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469cf3a4 | 1 | /* dhclient.c |
95821729 | 2 | |
9bdb9271 | 3 | DHCP Client. */ |
95821729 TL |
4 | |
5 | /* | |
397599cb | 6 | * Copyright (c) 2004-2018 by Internet Systems Consortium, Inc. ("ISC") |
98311e4b | 7 | * Copyright (c) 1995-2003 by Internet Software Consortium |
95821729 | 8 | * |
7512d88b TM |
9 | * This Source Code Form is subject to the terms of the Mozilla Public |
10 | * License, v. 2.0. If a copy of the MPL was not distributed with this | |
11 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. | |
95821729 | 12 | * |
98311e4b DH |
13 | * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES |
14 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
15 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR | |
16 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
17 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
18 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT | |
19 | * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
95821729 | 20 | * |
98311e4b DH |
21 | * Internet Systems Consortium, Inc. |
22 | * 950 Charter Street | |
23 | * Redwood City, CA 94063 | |
24 | * <info@isc.org> | |
2c85ac9b | 25 | * https://www.isc.org/ |
31730f17 | 26 | * |
3b106356 TL |
27 | * This code is based on the original client state machine that was |
28 | * written by Elliot Poger. The code has been extensively hacked on | |
29 | * by Ted Lemon since then, so any mistakes you find are probably his | |
30 | * fault and not Elliot's. | |
95821729 TL |
31 | */ |
32 | ||
c1503c57 | 33 | #include "dhcpd.h" |
e39b4193 TM |
34 | #include <isc/util.h> |
35 | #include <isc/file.h> | |
36 | #include <dns/result.h> | |
fe5b0fdd DH |
37 | #include <syslog.h> |
38 | #include <signal.h> | |
39 | #include <errno.h> | |
be62cf06 | 40 | #include <sys/time.h> |
fe5b0fdd | 41 | #include <sys/wait.h> |
e847f983 | 42 | #include <limits.h> |
e581d615 | 43 | |
4a0d788a TL |
44 | TIME default_lease_time = 43200; /* 12 hours... */ |
45 | TIME max_lease_time = 86400; /* 24 hours... */ | |
46 | ||
b1b7b521 | 47 | const char *path_dhclient_conf = _PATH_DHCLIENT_CONF; |
98bd7ca0 DH |
48 | const char *path_dhclient_db = NULL; |
49 | const char *path_dhclient_pid = NULL; | |
420d8b3f | 50 | static char path_dhclient_script_array[] = _PATH_DHCLIENT_SCRIPT; |
c08637bb | 51 | char *path_dhclient_script = path_dhclient_script_array; |
79818c93 | 52 | const char *path_dhclient_duid = NULL; |
cc26de46 | 53 | |
4a5bfeac SR |
54 | /* False (default) => we write and use a pid file */ |
55 | isc_boolean_t no_pid_file = ISC_FALSE; | |
56 | ||
36f5cb7c TL |
57 | int dhcp_max_agent_option_packet_length = 0; |
58 | ||
b8cf055d TL |
59 | int interfaces_requested = 0; |
60 | ||
cc26de46 TL |
61 | struct iaddr iaddr_broadcast = { 4, { 255, 255, 255, 255 } }; |
62 | struct iaddr iaddr_any = { 4, { 0, 0, 0, 0 } }; | |
48d68880 | 63 | struct in_addr inaddr_any; |
cc26de46 | 64 | struct sockaddr_in sockaddr_broadcast; |
11373fb6 | 65 | struct in_addr giaddr; |
98bd7ca0 | 66 | struct data_string default_duid; |
a41d7a25 | 67 | int duid_type = 0; |
d7d9c0c7 SR |
68 | int duid_v4 = 0; |
69 | int std_dhcid = 0; | |
469cf3a4 | 70 | |
3e88222f TM |
71 | int decline_wait_time = 10; /* Default to 10 secs per, RFC 2131, 3.1.5 */ |
72 | ||
cc26de46 TL |
73 | /* ASSERT_STATE() does nothing now; it used to be |
74 | assert (state_is == state_shouldbe). */ | |
75 | #define ASSERT_STATE(state_is, state_shouldbe) {} | |
469cf3a4 | 76 | |
eda1d0aa | 77 | #ifndef UNIT_TEST |
397599cb | 78 | static const char copyright[] = "Copyright 2004-2018 Internet Systems Consortium."; |
ae566556 SR |
79 | static const char arr [] = "All rights reserved."; |
80 | static const char message [] = "Internet Systems Consortium DHCP Client"; | |
2c85ac9b | 81 | static const char url [] = "For info, please visit https://www.isc.org/software/dhcp/"; |
eda1d0aa | 82 | #endif /* UNIT_TEST */ |
c1503c57 | 83 | |
420d8b3f FD |
84 | u_int16_t local_port = 0; |
85 | u_int16_t remote_port = 0; | |
785c1a51 FD |
86 | #if defined(DHCPv6) && defined(DHCP4o6) |
87 | int dhcp4o6_state = -1; /* -1 = stopped, 0 = polling, 1 = started */ | |
88 | #endif | |
420d8b3f | 89 | int no_daemon = 0; |
29b23207 | 90 | int dfd[2] = { -1, -1 }; |
420d8b3f FD |
91 | struct string_list *client_env = NULL; |
92 | int client_env_count = 0; | |
93 | int onetry = 0; | |
94 | int quiet = 1; | |
95 | int nowait = 0; | |
96 | int stateless = 0; | |
97 | int wanted_ia_na = -1; /* the absolute value is the real one. */ | |
98 | int wanted_ia_ta = 0; | |
99 | int wanted_ia_pd = 0; | |
c88dfebd SR |
100 | int require_all_ias = 0; /* If the user requires all of the IAs to |
101 | be available before accepting a lease | |
102 | 0 = no, 1 = requries */ | |
c0e9661e | 103 | #if defined(DHCPv6) |
a68ec967 | 104 | int dad_wait_time = 0; |
c0e9661e TM |
105 | int prefix_len_hint = 0; |
106 | #endif | |
107 | ||
140612c8 | 108 | int address_prefix_len = DHCLIENT_DEFAULT_PREFIX_LEN; |
98bd7ca0 | 109 | char *mockup_relay = NULL; |
c1503c57 | 110 | |
7acd8753 FD |
111 | char *progname = NULL; |
112 | ||
785c1a51 | 113 | void run_stateless(int exit_mode, u_int16_t port); |
3dbe2246 | 114 | |
98bd7ca0 | 115 | static isc_result_t write_duid(struct data_string *duid); |
5d082abd | 116 | static void add_reject(struct packet *packet); |
98bd7ca0 | 117 | |
bea17697 SR |
118 | static int check_domain_name(const char *ptr, size_t len, int dots); |
119 | static int check_domain_name_list(const char *ptr, size_t len, int dots); | |
120 | static int check_option_values(struct universe *universe, unsigned int opt, | |
121 | const char *ptr, size_t len); | |
122 | ||
cca6a648 | 123 | static void dhclient_ddns_cb_free(dhcp_ddns_cb_t *ddns_cb, |
124 | char* file, int line); | |
125 | ||
b2cb745b SR |
126 | /*! |
127 | * | |
128 | * \brief Print the generic usage message | |
129 | * | |
130 | * If the user has provided an incorrect command line print out | |
131 | * the description of the command line. The arguments provide | |
132 | * a way for the caller to request more specific information about | |
133 | * the error be printed as well. Mostly this will be that some | |
134 | * comamnd doesn't include its argument. | |
135 | * | |
136 | * \param sfmt - The basic string and format for the specific error | |
137 | * \param sarg - Generally the offending argument from the comamnd line. | |
138 | * | |
139 | * \return Nothing | |
140 | */ | |
141 | ||
785c1a51 FD |
142 | #if defined(DHCPv6) && defined(DHCP4o6) |
143 | static void dhcp4o6_poll(void *dummy); | |
144 | static void dhcp4o6_resume(void); | |
145 | static void recv_dhcpv4_response(struct data_string *raw); | |
146 | static int send_dhcpv4_query(struct client_state *client, int broadcast); | |
147 | ||
148 | static void dhcp4o6_stop(void); | |
149 | static void forw_dhcpv4_response(struct packet *packet); | |
150 | static void forw_dhcpv4_query(struct data_string *raw); | |
151 | #endif | |
152 | ||
b2cb745b SR |
153 | #ifndef UNIT_TEST |
154 | /* These are only used when we call usage() from the main routine | |
155 | * which isn't compiled when building for unit tests | |
156 | */ | |
157 | static const char use_noarg[] = "No argument for command: %s"; | |
eda1d0aa | 158 | #ifdef DHCPv6 |
b2cb745b | 159 | static const char use_v6command[] = "Command not used for DHCPv4: %s"; |
eda1d0aa | 160 | #endif |
b2cb745b | 161 | |
68dfa910 FD |
162 | #ifdef DHCPv6 |
163 | #ifdef DHCP4o6 | |
164 | #define DHCLIENT_USAGE0 \ | |
3e88222f TM |
165 | "[-4|-6] [-SNTPRI1dvrxi] [-nw] -4o6 <port>] [-p <port>] [-D LL|LLT]\n" \ |
166 | " [--dad-wait-time <seconds>] [--prefix-len-hint <length>]\n" \ | |
140612c8 | 167 | " [--decline-wait-time <seconds>]\n" \ |
a804fcc0 | 168 | " [--address-prefix-len <length>]\n" |
68dfa910 FD |
169 | #else /* DHCP4o6 */ |
170 | #define DHCLIENT_USAGE0 \ | |
a68ec967 | 171 | "[-4|-6] [-SNTPRI1dvrxi] [-nw] [-p <port>] [-D LL|LLT]\n" \ |
3e88222f | 172 | " [--dad-wait-time <seconds>] [--prefix-len-hint <length>]\n" \ |
140612c8 | 173 | " [--decline-wait-time <seconds>]\n" \ |
a804fcc0 | 174 | " [--address-prefix-len <length>]\n" |
68dfa910 FD |
175 | #endif |
176 | #else /* DHCPv6 */ | |
177 | #define DHCLIENT_USAGE0 \ | |
3e88222f TM |
178 | "[-I1dvrxi] [-nw] [-p <port>] [-D LL|LLT] \n" \ |
179 | " [--decline-wait-time <seconds>]\n" | |
68dfa910 FD |
180 | #endif |
181 | ||
182 | #define DHCLIENT_USAGEC \ | |
183 | " [-s server-addr] [-cf config-file]\n" \ | |
184 | " [-df duid-file] [-lf lease-file]\n" \ | |
185 | " [-pf pid-file] [--no-pid] [-e VAR=val]\n" \ | |
186 | " [-sf script-file] [interface]*" | |
187 | ||
188 | #define DHCLIENT_USAGEH "{--version|--help|-h}" | |
189 | ||
b2cb745b SR |
190 | static void |
191 | usage(const char *sfmt, const char *sarg) | |
192 | { | |
193 | log_info("%s %s", message, PACKAGE_VERSION); | |
194 | log_info(copyright); | |
195 | log_info(arr); | |
196 | log_info(url); | |
197 | ||
198 | /* If desired print out the specific error message */ | |
199 | #ifdef PRINT_SPECIFIC_CL_ERRORS | |
200 | if (sfmt != NULL) | |
201 | log_error(sfmt, sarg); | |
202 | #endif | |
203 | ||
86bda88b | 204 | log_fatal("Usage: %s %s%s\n %s %s", |
68dfa910 FD |
205 | isc_file_basename(progname), |
206 | DHCLIENT_USAGE0, | |
207 | DHCLIENT_USAGEC, | |
208 | isc_file_basename(progname), | |
209 | DHCLIENT_USAGEH); | |
b2cb745b SR |
210 | } |
211 | ||
c0a64ef0 TM |
212 | extern void initialize_client_option_spaces(); |
213 | ||
3dbe2246 | 214 | int |
98bd7ca0 | 215 | main(int argc, char **argv) { |
185d16f9 | 216 | int fd; |
c1503c57 | 217 | int i; |
cc26de46 | 218 | struct interface_info *ip; |
02d9e453 | 219 | struct client_state *client; |
b1b7b521 | 220 | unsigned seed; |
420d8b3f | 221 | char *server = NULL; |
628beb0e | 222 | isc_result_t status; |
3dbe2246 FD |
223 | int exit_mode = 0; |
224 | int release_mode = 0; | |
be62cf06 | 225 | struct timeval tv; |
347de8bd TL |
226 | omapi_object_t *listener; |
227 | isc_result_t result; | |
134ceef8 | 228 | int persist = 0; |
cfa7212d TL |
229 | int no_dhclient_conf = 0; |
230 | int no_dhclient_db = 0; | |
231 | int no_dhclient_pid = 0; | |
c08637bb | 232 | int no_dhclient_script = 0; |
c998be87 | 233 | #ifdef DHCPv6 |
98bd7ca0 | 234 | int local_family_set = 0; |
785c1a51 FD |
235 | #ifdef DHCP4o6 |
236 | u_int16_t dhcp4o6_port = 0; | |
237 | #endif /* DHCP4o6 */ | |
c998be87 | 238 | #endif /* DHCPv6 */ |
cfa7212d | 239 | char *s; |
6c6d5928 | 240 | |
7acd8753 FD |
241 | #ifdef OLD_LOG_NAME |
242 | progname = "dhclient"; | |
243 | #else | |
244 | progname = argv[0]; | |
245 | #endif | |
98bd7ca0 DH |
246 | /* Initialize client globals. */ |
247 | memset(&default_duid, 0, sizeof(default_duid)); | |
248 | ||
3dbe2246 FD |
249 | /* Make sure that file descriptors 0 (stdin), 1, (stdout), and |
250 | 2 (stderr) are open. To do this, we assume that when we | |
251 | open a file the lowest available file descriptor is used. */ | |
252 | fd = open("/dev/null", O_RDWR); | |
253 | if (fd == 0) | |
254 | fd = open("/dev/null", O_RDWR); | |
255 | if (fd == 1) | |
256 | fd = open("/dev/null", O_RDWR); | |
257 | if (fd == 2) | |
258 | log_perror = 0; /* No sense logging to /dev/null. */ | |
259 | else if (fd != -1) | |
260 | close(fd); | |
ee8a3653 | 261 | |
7acd8753 | 262 | openlog(isc_file_basename(progname), DHCP_LOG_OPTIONS, LOG_DAEMON); |
95821729 | 263 | |
420d8b3f FD |
264 | #if !(defined(DEBUG) || defined(__CYGWIN32__)) |
265 | setlogmask(LOG_UPTO(LOG_INFO)); | |
3dbe2246 | 266 | #endif |
c1503c57 | 267 | |
29b23207 FD |
268 | /* Parse arguments changing no_daemon */ |
269 | for (i = 1; i < argc; i++) { | |
270 | if (!strcmp(argv[i], "-r")) { | |
271 | no_daemon = 1; | |
272 | } else if (!strcmp(argv[i], "-x")) { | |
273 | no_daemon = 0; | |
274 | } else if (!strcmp(argv[i], "-d")) { | |
275 | no_daemon = 1; | |
276 | } else if (!strcmp(argv[i], "--version")) { | |
277 | const char vstring[] = "isc-dhclient-"; | |
278 | IGNORE_RET(write(STDERR_FILENO, vstring, | |
279 | strlen(vstring))); | |
280 | IGNORE_RET(write(STDERR_FILENO, | |
281 | PACKAGE_VERSION, | |
282 | strlen(PACKAGE_VERSION))); | |
283 | IGNORE_RET(write(STDERR_FILENO, "\n", 1)); | |
284 | exit(0); | |
68dfa910 FD |
285 | } else if (!strcmp(argv[i], "--help") || |
286 | !strcmp(argv[i], "-h")) { | |
287 | const char *pname = isc_file_basename(progname); | |
288 | IGNORE_RET(write(STDERR_FILENO, "Usage: ", 7)); | |
289 | IGNORE_RET(write(STDERR_FILENO, pname, strlen(pname))); | |
290 | IGNORE_RET(write(STDERR_FILENO, " ", 1)); | |
291 | IGNORE_RET(write(STDERR_FILENO, DHCLIENT_USAGE0, | |
292 | strlen(DHCLIENT_USAGE0))); | |
293 | IGNORE_RET(write(STDERR_FILENO, DHCLIENT_USAGEC, | |
294 | strlen(DHCLIENT_USAGEC))); | |
295 | IGNORE_RET(write(STDERR_FILENO, "\n", 1)); | |
296 | IGNORE_RET(write(STDERR_FILENO, " ", 7)); | |
297 | IGNORE_RET(write(STDERR_FILENO, pname, strlen(pname))); | |
298 | IGNORE_RET(write(STDERR_FILENO, " ", 1)); | |
299 | IGNORE_RET(write(STDERR_FILENO, DHCLIENT_USAGEH, | |
300 | strlen(DHCLIENT_USAGEH))); | |
301 | IGNORE_RET(write(STDERR_FILENO, "\n", 1)); | |
302 | exit(0); | |
29b23207 FD |
303 | } |
304 | } | |
305 | /* When not forbidden prepare to become a daemon */ | |
306 | if (!no_daemon) { | |
307 | int pid; | |
308 | ||
309 | if (pipe(dfd) == -1) | |
310 | log_fatal("Can't get pipe: %m"); | |
311 | if ((pid = fork ()) < 0) | |
312 | log_fatal("Can't fork daemon: %m"); | |
313 | if (pid != 0) { | |
314 | /* Parent: wait for the child to start */ | |
315 | int n; | |
316 | ||
317 | (void) close(dfd[1]); | |
318 | do { | |
319 | char buf; | |
320 | ||
321 | n = read(dfd[0], &buf, 1); | |
322 | if (n == 1) | |
323 | _exit((int)buf); | |
324 | } while (n == -1 && errno == EINTR); | |
325 | _exit(1); | |
326 | } | |
327 | /* Child */ | |
328 | (void) close(dfd[0]); | |
329 | } | |
330 | ||
98bf1607 | 331 | /* Set up the isc and dns library managers */ |
ca22af89 TM |
332 | status = dhcp_context_create(DHCP_CONTEXT_PRE_DB | DHCP_CONTEXT_POST_DB |
333 | | DHCP_DNS_CLIENT_LAZY_INIT, NULL, NULL); | |
98bf1607 SR |
334 | if (status != ISC_R_SUCCESS) |
335 | log_fatal("Can't initialize context: %s", | |
336 | isc_result_totext(status)); | |
337 | ||
67569fa6 | 338 | /* Set up the OMAPI. */ |
420d8b3f | 339 | status = omapi_init(); |
67569fa6 | 340 | if (status != ISC_R_SUCCESS) |
420d8b3f FD |
341 | log_fatal("Can't initialize OMAPI: %s", |
342 | isc_result_totext(status)); | |
67569fa6 TL |
343 | |
344 | /* Set up the OMAPI wrappers for various server database internal | |
345 | objects. */ | |
420d8b3f | 346 | dhcp_common_objects_setup(); |
67569fa6 TL |
347 | |
348 | dhcp_interface_discovery_hook = dhclient_interface_discovery_hook; | |
349 | dhcp_interface_shutdown_hook = dhclient_interface_shutdown_hook; | |
57710b89 | 350 | dhcp_interface_startup_hook = dhclient_interface_startup_hook; |
67569fa6 | 351 | |
c1503c57 | 352 | for (i = 1; i < argc; i++) { |
3dbe2246 | 353 | if (!strcmp(argv[i], "-r")) { |
182b187e | 354 | release_mode = 1; |
29b23207 | 355 | /* no_daemon = 1; */ |
182b187e EH |
356 | #ifdef DHCPv6 |
357 | } else if (!strcmp(argv[i], "-4")) { | |
98bd7ca0 DH |
358 | if (local_family_set && local_family != AF_INET) |
359 | log_fatal("Client can only do v4 or v6, not " | |
360 | "both."); | |
361 | local_family_set = 1; | |
362 | local_family = AF_INET; | |
363 | } else if (!strcmp(argv[i], "-6")) { | |
364 | if (local_family_set && local_family != AF_INET6) | |
365 | log_fatal("Client can only do v4 or v6, not " | |
366 | "both."); | |
367 | local_family_set = 1; | |
368 | local_family = AF_INET6; | |
785c1a51 FD |
369 | #ifdef DHCP4o6 |
370 | } else if (!strcmp(argv[i], "-4o6")) { | |
371 | if (++i == argc) | |
372 | usage(use_noarg, argv[i-1]); | |
373 | dhcp4o6_port = validate_port_pair(argv[i]); | |
374 | ||
375 | log_debug("DHCPv4 over DHCPv6 over ::1 port %d and %d", | |
376 | ntohs(dhcp4o6_port), | |
377 | ntohs(dhcp4o6_port) + 1); | |
378 | dhcpv4_over_dhcpv6 = 1; | |
379 | #endif /* DHCP4o6 */ | |
182b187e | 380 | #endif /* DHCPv6 */ |
420d8b3f | 381 | } else if (!strcmp(argv[i], "-x")) { /* eXit, no release */ |
3dbe2246 | 382 | release_mode = 0; |
29b23207 | 383 | /* no_daemon = 0; */ |
3dbe2246 | 384 | exit_mode = 1; |
420d8b3f | 385 | } else if (!strcmp(argv[i], "-p")) { |
c1503c57 | 386 | if (++i == argc) |
b2cb745b | 387 | usage(use_noarg, argv[i-1]); |
59112e84 | 388 | local_port = validate_port(argv[i]); |
420d8b3f FD |
389 | log_debug("binding to user-specified port %d", |
390 | ntohs(local_port)); | |
391 | } else if (!strcmp(argv[i], "-d")) { | |
29b23207 | 392 | /* no_daemon = 1; */ |
8ea19a71 | 393 | quiet = 0; |
420d8b3f | 394 | } else if (!strcmp(argv[i], "-pf")) { |
3dbe2246 | 395 | if (++i == argc) |
b2cb745b | 396 | usage(use_noarg, argv[i-1]); |
420d8b3f | 397 | path_dhclient_pid = argv[i]; |
cfa7212d | 398 | no_dhclient_pid = 1; |
4a5bfeac SR |
399 | } else if (!strcmp(argv[i], "--no-pid")) { |
400 | no_pid_file = ISC_TRUE; | |
420d8b3f | 401 | } else if (!strcmp(argv[i], "-cf")) { |
3dbe2246 | 402 | if (++i == argc) |
b2cb745b | 403 | usage(use_noarg, argv[i-1]); |
420d8b3f | 404 | path_dhclient_conf = argv[i]; |
cfa7212d | 405 | no_dhclient_conf = 1; |
79818c93 SR |
406 | } else if (!strcmp(argv[i], "-df")) { |
407 | if (++i == argc) | |
b2cb745b | 408 | usage(use_noarg, argv[i-1]); |
79818c93 | 409 | path_dhclient_duid = argv[i]; |
420d8b3f | 410 | } else if (!strcmp(argv[i], "-lf")) { |
3dbe2246 | 411 | if (++i == argc) |
b2cb745b | 412 | usage(use_noarg, argv[i-1]); |
420d8b3f | 413 | path_dhclient_db = argv[i]; |
cfa7212d | 414 | no_dhclient_db = 1; |
420d8b3f | 415 | } else if (!strcmp(argv[i], "-sf")) { |
c08637bb | 416 | if (++i == argc) |
b2cb745b | 417 | usage(use_noarg, argv[i-1]); |
420d8b3f | 418 | path_dhclient_script = argv[i]; |
c08637bb | 419 | no_dhclient_script = 1; |
420d8b3f | 420 | } else if (!strcmp(argv[i], "-1")) { |
c08637bb | 421 | onetry = 1; |
420d8b3f | 422 | } else if (!strcmp(argv[i], "-q")) { |
62d0cb47 | 423 | quiet = 1; |
420d8b3f | 424 | } else if (!strcmp(argv[i], "-s")) { |
3020a2c1 | 425 | if (++i == argc) |
b2cb745b | 426 | usage(use_noarg, argv[i-1]); |
420d8b3f FD |
427 | server = argv[i]; |
428 | } else if (!strcmp(argv[i], "-g")) { | |
11373fb6 | 429 | if (++i == argc) |
b2cb745b | 430 | usage(use_noarg, argv[i-1]); |
420d8b3f FD |
431 | mockup_relay = argv[i]; |
432 | } else if (!strcmp(argv[i], "-nw")) { | |
98311e4b | 433 | nowait = 1; |
420d8b3f | 434 | } else if (!strcmp(argv[i], "-n")) { |
347de8bd | 435 | /* do not start up any interfaces */ |
3dbe2246 | 436 | interfaces_requested = -1; |
420d8b3f | 437 | } else if (!strcmp(argv[i], "-w")) { |
134ceef8 TL |
438 | /* do not exit if there are no broadcast interfaces. */ |
439 | persist = 1; | |
420d8b3f | 440 | } else if (!strcmp(argv[i], "-e")) { |
b1423aed TL |
441 | struct string_list *tmp; |
442 | if (++i == argc) | |
b2cb745b | 443 | usage(use_noarg, argv[i-1]); |
420d8b3f | 444 | tmp = dmalloc(strlen(argv[i]) + sizeof *tmp, MDL); |
b1423aed | 445 | if (!tmp) |
420d8b3f FD |
446 | log_fatal("No memory for %s", argv[i]); |
447 | strcpy(tmp->string, argv[i]); | |
448 | tmp->next = client_env; | |
b1423aed TL |
449 | client_env = tmp; |
450 | client_env_count++; | |
420d8b3f | 451 | #ifdef DHCPv6 |
3dbe2246 FD |
452 | } else if (!strcmp(argv[i], "-S")) { |
453 | if (local_family_set && (local_family == AF_INET)) { | |
b2cb745b | 454 | usage(use_v6command, argv[i]); |
3dbe2246 FD |
455 | } |
456 | local_family_set = 1; | |
457 | local_family = AF_INET6; | |
420d8b3f | 458 | wanted_ia_na = 0; |
3dbe2246 | 459 | stateless = 1; |
420d8b3f FD |
460 | } else if (!strcmp(argv[i], "-N")) { |
461 | if (local_family_set && (local_family == AF_INET)) { | |
b2cb745b | 462 | usage(use_v6command, argv[i]); |
420d8b3f FD |
463 | } |
464 | local_family_set = 1; | |
465 | local_family = AF_INET6; | |
466 | if (wanted_ia_na < 0) { | |
467 | wanted_ia_na = 0; | |
468 | } | |
469 | wanted_ia_na++; | |
470 | } else if (!strcmp(argv[i], "-T")) { | |
471 | if (local_family_set && (local_family == AF_INET)) { | |
b2cb745b | 472 | usage(use_v6command, argv[i]); |
420d8b3f FD |
473 | } |
474 | local_family_set = 1; | |
475 | local_family = AF_INET6; | |
476 | if (wanted_ia_na < 0) { | |
477 | wanted_ia_na = 0; | |
478 | } | |
479 | wanted_ia_ta++; | |
480 | } else if (!strcmp(argv[i], "-P")) { | |
481 | if (local_family_set && (local_family == AF_INET)) { | |
b2cb745b | 482 | usage(use_v6command, argv[i]); |
420d8b3f FD |
483 | } |
484 | local_family_set = 1; | |
485 | local_family = AF_INET6; | |
486 | if (wanted_ia_na < 0) { | |
487 | wanted_ia_na = 0; | |
488 | } | |
489 | wanted_ia_pd++; | |
c88dfebd SR |
490 | } else if (!strcmp(argv[i], "-R")) { |
491 | if (local_family_set && (local_family == AF_INET)) { | |
b2cb745b | 492 | usage(use_v6command, argv[i]); |
c88dfebd SR |
493 | } |
494 | local_family_set = 1; | |
495 | local_family = AF_INET6; | |
496 | require_all_ias = 1; | |
a68ec967 MS |
497 | } else if (!strcmp(argv[i], "--dad-wait-time")) { |
498 | if (++i == argc) { | |
499 | usage(use_noarg, argv[i-1]); | |
500 | } | |
83f1dd95 | 501 | errno = 0; |
a68ec967 MS |
502 | dad_wait_time = (int)strtol(argv[i], &s, 10); |
503 | if (errno || (*s != '\0') || (dad_wait_time < 0)) { | |
83f1dd95 TM |
504 | usage("Invalid value for --dad-wait-time: %s", |
505 | argv[i]); | |
a68ec967 | 506 | } |
c0e9661e TM |
507 | } else if (!strcmp(argv[i], "--prefix-len-hint")) { |
508 | if (++i == argc) { | |
509 | usage(use_noarg, argv[i-1]); | |
510 | } | |
a68ec967 | 511 | |
c0e9661e TM |
512 | errno = 0; |
513 | prefix_len_hint = (int)strtol(argv[i], &s, 10); | |
514 | if (errno || (*s != '\0') || (prefix_len_hint < 0)) { | |
515 | usage("Invalid value for --prefix-len-hint: %s", | |
516 | argv[i]); | |
517 | } | |
140612c8 TM |
518 | } else if (!strcmp(argv[i], "--address-prefix-len")) { |
519 | if (++i == argc) { | |
520 | usage(use_noarg, argv[i-1]); | |
521 | } | |
522 | errno = 0; | |
523 | address_prefix_len = (int)strtol(argv[i], &s, 10); | |
524 | if (errno || (*s != '\0') || | |
525 | (address_prefix_len < 0)) { | |
526 | usage("Invalid value for" | |
527 | " --address-prefix-len: %s", argv[i]); | |
528 | } | |
d7d9c0c7 | 529 | #endif /* DHCPv6 */ |
3e88222f TM |
530 | } else if (!strcmp(argv[i], "--decline-wait-time")) { |
531 | if (++i == argc) { | |
532 | usage(use_noarg, argv[i-1]); | |
533 | } | |
534 | ||
535 | errno = 0; | |
536 | decline_wait_time = (int)strtol(argv[i], &s, 10); | |
537 | if (errno || (*s != '\0') || | |
538 | (decline_wait_time < 0)) { | |
539 | usage("Invalid value for " | |
540 | "--decline-wait-time: %s", argv[i]); | |
541 | } | |
a41d7a25 | 542 | } else if (!strcmp(argv[i], "-D")) { |
d7d9c0c7 | 543 | duid_v4 = 1; |
a41d7a25 | 544 | if (++i == argc) |
b2cb745b | 545 | usage(use_noarg, argv[i-1]); |
a41d7a25 PS |
546 | if (!strcasecmp(argv[i], "LL")) { |
547 | duid_type = DUID_LL; | |
548 | } else if (!strcasecmp(argv[i], "LLT")) { | |
549 | duid_type = DUID_LLT; | |
550 | } else { | |
b2cb745b | 551 | usage("Unknown argument to -D: %s", argv[i]); |
a41d7a25 | 552 | } |
d7d9c0c7 SR |
553 | } else if (!strcmp(argv[i], "-i")) { |
554 | /* enable DUID support for DHCPv4 clients */ | |
555 | duid_v4 = 1; | |
556 | } else if (!strcmp(argv[i], "-I")) { | |
557 | /* enable standard DHCID support for DDNS updates */ | |
558 | std_dhcid = 1; | |
8ea19a71 DH |
559 | } else if (!strcmp(argv[i], "-v")) { |
560 | quiet = 0; | |
420d8b3f | 561 | } else if (argv[i][0] == '-') { |
b2cb745b | 562 | usage("Unknown command: %s", argv[i]); |
3dbe2246 | 563 | } else if (interfaces_requested < 0) { |
b2cb745b SR |
564 | usage("No interfaces comamnd -n and " |
565 | " requested interface %s", argv[i]); | |
98311e4b | 566 | } else { |
420d8b3f FD |
567 | struct interface_info *tmp = NULL; |
568 | ||
569 | status = interface_allocate(&tmp, MDL); | |
3dbe2246 | 570 | if (status != ISC_R_SUCCESS) |
420d8b3f FD |
571 | log_fatal("Can't record interface %s:%s", |
572 | argv[i], isc_result_totext(status)); | |
88cd8aca DH |
573 | if (strlen(argv[i]) >= sizeof(tmp->name)) |
574 | log_fatal("%s: interface name too long (is %ld)", | |
420d8b3f | 575 | argv[i], (long)strlen(argv[i])); |
88cd8aca | 576 | strcpy(tmp->name, argv[i]); |
20916cae | 577 | if (interfaces) { |
420d8b3f FD |
578 | interface_reference(&tmp->next, |
579 | interfaces, MDL); | |
580 | interface_dereference(&interfaces, MDL); | |
20916cae | 581 | } |
420d8b3f FD |
582 | interface_reference(&interfaces, tmp, MDL); |
583 | tmp->flags = INTERFACE_REQUESTED; | |
3dbe2246 FD |
584 | interfaces_requested++; |
585 | } | |
c1503c57 | 586 | } |
62d0cb47 | 587 | |
420d8b3f FD |
588 | if (wanted_ia_na < 0) { |
589 | wanted_ia_na = 1; | |
590 | } | |
591 | ||
592 | /* Support only one (requested) interface for Prefix Delegation. */ | |
593 | if (wanted_ia_pd && (interfaces_requested != 1)) { | |
b2cb745b | 594 | usage("PD %s only supports one requested interface", "-P"); |
420d8b3f FD |
595 | } |
596 | ||
785c1a51 FD |
597 | #if defined(DHCPv6) && defined(DHCP4o6) |
598 | if ((local_family == AF_INET6) && dhcpv4_over_dhcpv6 && | |
599 | (exit_mode || release_mode)) | |
600 | log_error("Can't relay DHCPv4-over-DHCPv6 " | |
601 | "without a persistent DHCPv6 client"); | |
602 | if ((local_family == AF_INET) && dhcpv4_over_dhcpv6 && | |
603 | (interfaces_requested != 1)) | |
604 | log_fatal("DHCPv4-over-DHCPv6 requires an explicit " | |
605 | "interface on which to be applied"); | |
606 | #endif | |
607 | ||
420d8b3f | 608 | if (!no_dhclient_conf && (s = getenv("PATH_DHCLIENT_CONF"))) { |
cfa7212d TL |
609 | path_dhclient_conf = s; |
610 | } | |
420d8b3f | 611 | if (!no_dhclient_db && (s = getenv("PATH_DHCLIENT_DB"))) { |
cfa7212d TL |
612 | path_dhclient_db = s; |
613 | } | |
420d8b3f | 614 | if (!no_dhclient_pid && (s = getenv("PATH_DHCLIENT_PID"))) { |
cfa7212d TL |
615 | path_dhclient_pid = s; |
616 | } | |
420d8b3f | 617 | if (!no_dhclient_script && (s = getenv("PATH_DHCLIENT_SCRIPT"))) { |
c08637bb TL |
618 | path_dhclient_script = s; |
619 | } | |
cfa7212d | 620 | |
98bd7ca0 DH |
621 | /* Set up the initial dhcp option universe. */ |
622 | initialize_common_option_spaces(); | |
623 | ||
c0a64ef0 TM |
624 | /* Set up the initial client option universe. */ |
625 | initialize_client_option_spaces(); | |
626 | ||
98bd7ca0 DH |
627 | /* Assign v4 or v6 specific running parameters. */ |
628 | if (local_family == AF_INET) | |
629 | dhcpv4_client_assignments(); | |
fe5b0fdd | 630 | #ifdef DHCPv6 |
98bd7ca0 DH |
631 | else if (local_family == AF_INET6) |
632 | dhcpv6_client_assignments(); | |
fe5b0fdd | 633 | #endif /* DHCPv6 */ |
98bd7ca0 DH |
634 | else |
635 | log_fatal("Impossible condition at %s:%d.", MDL); | |
636 | ||
a546f2a7 EH |
637 | /* |
638 | * convert relative path names to absolute, for files that need | |
639 | * to be reopened after chdir() has been called | |
640 | */ | |
641 | if (path_dhclient_db[0] != '/') { | |
32e651c4 SR |
642 | const char *old_path = path_dhclient_db; |
643 | path_dhclient_db = realpath(path_dhclient_db, NULL); | |
a546f2a7 | 644 | if (path_dhclient_db == NULL) |
32e651c4 | 645 | log_fatal("Failed to get realpath for %s: %s", old_path, strerror(errno)); |
a546f2a7 | 646 | } |
3dbe2246 | 647 | |
a546f2a7 | 648 | if (path_dhclient_script[0] != '/') { |
32e651c4 SR |
649 | const char *old_path = path_dhclient_script; |
650 | path_dhclient_script = realpath(path_dhclient_script, NULL); | |
a546f2a7 | 651 | if (path_dhclient_script == NULL) |
32e651c4 | 652 | log_fatal("Failed to get realpath for %s: %s", old_path, strerror(errno)); |
a546f2a7 | 653 | } |
3dbe2246 | 654 | |
4a5bfeac SR |
655 | /* |
656 | * See if we should kill off any currently running client | |
657 | * we don't try to kill it off if the user told us not | |
658 | * to write a pid file - we assume they are controlling | |
659 | * the process in some other fashion. | |
660 | */ | |
661 | if ((release_mode || exit_mode) && (no_pid_file == ISC_FALSE)) { | |
98311e4b DH |
662 | FILE *pidfd; |
663 | pid_t oldpid; | |
664 | long temp; | |
665 | int e; | |
666 | ||
98311e4b DH |
667 | if ((pidfd = fopen(path_dhclient_pid, "r")) != NULL) { |
668 | e = fscanf(pidfd, "%ld\n", &temp); | |
669 | oldpid = (pid_t)temp; | |
670 | ||
f950de77 SR |
671 | if (e != 0 && e != EOF && oldpid) { |
672 | if (kill(oldpid, SIGTERM) == 0) { | |
673 | log_info("Killed old client process"); | |
674 | (void) unlink(path_dhclient_pid); | |
ad4001ce SR |
675 | /* |
676 | * wait for the old process to | |
677 | * cleanly terminate. | |
678 | * Note kill() with sig=0 could | |
679 | * detect termination but only | |
680 | * the parent can be signaled... | |
681 | */ | |
682 | sleep(1); | |
f950de77 SR |
683 | } else if (errno == ESRCH) { |
684 | log_info("Removed stale PID file"); | |
685 | (void) unlink(path_dhclient_pid); | |
ad4001ce | 686 | } |
98311e4b DH |
687 | } |
688 | fclose(pidfd); | |
689 | } | |
347de8bd TL |
690 | } |
691 | ||
62d0cb47 | 692 | if (!quiet) { |
420d8b3f FD |
693 | log_info("%s %s", message, PACKAGE_VERSION); |
694 | log_info(copyright); | |
695 | log_info(arr); | |
696 | log_info(url); | |
697 | log_info("%s", ""); | |
8ea19a71 | 698 | } else { |
78a33b82 | 699 | log_perror = 0; |
8ea19a71 DH |
700 | quiet_interface_discovery = 1; |
701 | } | |
62d0cb47 | 702 | |
11373fb6 TL |
703 | /* If we're given a relay agent address to insert, for testing |
704 | purposes, figure out what it is. */ | |
98bd7ca0 | 705 | if (mockup_relay) { |
420d8b3f | 706 | if (!inet_aton(mockup_relay, &giaddr)) { |
11373fb6 | 707 | struct hostent *he; |
420d8b3f | 708 | he = gethostbyname(mockup_relay); |
11373fb6 | 709 | if (he) { |
420d8b3f FD |
710 | memcpy(&giaddr, he->h_addr_list[0], |
711 | sizeof giaddr); | |
11373fb6 | 712 | } else { |
420d8b3f | 713 | log_fatal("%s: no such host", mockup_relay); |
11373fb6 TL |
714 | } |
715 | } | |
716 | } | |
717 | ||
95821729 | 718 | /* Get the current time... */ |
be62cf06 | 719 | gettimeofday(&cur_tv, NULL); |
95821729 | 720 | |
b00d3884 | 721 | sockaddr_broadcast.sin_family = AF_INET; |
cc26de46 | 722 | sockaddr_broadcast.sin_port = remote_port; |
3020a2c1 | 723 | if (server) { |
420d8b3f | 724 | if (!inet_aton(server, &sockaddr_broadcast.sin_addr)) { |
3020a2c1 | 725 | struct hostent *he; |
420d8b3f | 726 | he = gethostbyname(server); |
3020a2c1 | 727 | if (he) { |
420d8b3f FD |
728 | memcpy(&sockaddr_broadcast.sin_addr, |
729 | he->h_addr_list[0], | |
730 | sizeof sockaddr_broadcast.sin_addr); | |
3020a2c1 TL |
731 | } else |
732 | sockaddr_broadcast.sin_addr.s_addr = | |
733 | INADDR_BROADCAST; | |
734 | } | |
735 | } else { | |
736 | sockaddr_broadcast.sin_addr.s_addr = INADDR_BROADCAST; | |
737 | } | |
11373fb6 | 738 | |
48d68880 | 739 | inaddr_any.s_addr = INADDR_ANY; |
469cf3a4 | 740 | |
3dbe2246 FD |
741 | /* Stateless special case. */ |
742 | if (stateless) { | |
420d8b3f FD |
743 | if (release_mode || (wanted_ia_na > 0) || |
744 | wanted_ia_ta || wanted_ia_pd || | |
745 | (interfaces_requested != 1)) { | |
29b23207 | 746 | usage("Stateless command: %s incompatibile with " |
b2cb745b | 747 | "other commands", "-S"); |
3dbe2246 | 748 | } |
785c1a51 FD |
749 | #if defined(DHCPv6) && defined(DHCP4o6) |
750 | run_stateless(exit_mode, dhcp4o6_port); | |
751 | #else | |
752 | run_stateless(exit_mode, 0); | |
753 | #endif | |
29b23207 | 754 | finish(0); |
3dbe2246 FD |
755 | } |
756 | ||
cc26de46 | 757 | /* Discover all the network interfaces. */ |
420d8b3f | 758 | discover_interfaces(DISCOVER_UNCONFIGURED); |
469cf3a4 | 759 | |
cc26de46 | 760 | /* Parse the dhclient.conf file. */ |
420d8b3f | 761 | read_client_conf(); |
469cf3a4 | 762 | |
cc26de46 | 763 | /* Parse the lease database. */ |
420d8b3f | 764 | read_client_leases(); |
469cf3a4 | 765 | |
79818c93 SR |
766 | /* If desired parse the secondary lease database for a DUID */ |
767 | if ((default_duid.len == 0) && (path_dhclient_duid != NULL)) { | |
768 | read_client_duid(); | |
769 | } | |
770 | ||
cc26de46 | 771 | /* Rewrite the lease database... */ |
420d8b3f | 772 | rewrite_client_leases(); |
469cf3a4 | 773 | |
ce0ec46d TL |
774 | /* XXX */ |
775 | /* config_counter(&snd_counter, &rcv_counter); */ | |
776 | ||
420d8b3f FD |
777 | /* |
778 | * If no broadcast interfaces were discovered, call the script | |
779 | * and tell it so. | |
780 | */ | |
cc26de46 | 781 | if (!interfaces) { |
420d8b3f FD |
782 | /* |
783 | * Call dhclient-script with the NBI flag, | |
784 | * in case somebody cares. | |
785 | */ | |
786 | script_init(NULL, "NBI", NULL); | |
787 | script_go(NULL); | |
788 | ||
789 | /* | |
790 | * If we haven't been asked to persist, waiting for new | |
791 | * interfaces, then just exit. | |
792 | */ | |
134ceef8 TL |
793 | if (!persist) { |
794 | /* Nothing more to do. */ | |
420d8b3f | 795 | log_info("No broadcast interfaces found - exiting."); |
29b23207 | 796 | finish(0); |
134ceef8 | 797 | } |
af5fa176 | 798 | } else if (!release_mode && !exit_mode) { |
cc26de46 | 799 | /* Call the script with the list of interfaces. */ |
420d8b3f FD |
800 | for (ip = interfaces; ip; ip = ip->next) { |
801 | /* | |
802 | * If interfaces were specified, don't configure | |
803 | * interfaces that weren't specified! | |
804 | */ | |
3dbe2246 | 805 | if ((interfaces_requested > 0) && |
420d8b3f FD |
806 | ((ip->flags & (INTERFACE_REQUESTED | |
807 | INTERFACE_AUTOMATIC)) != | |
62d0cb47 | 808 | INTERFACE_REQUESTED)) |
5c2f78b4 | 809 | continue; |
98bd7ca0 DH |
810 | |
811 | if (local_family == AF_INET6) { | |
812 | script_init(ip->client, "PREINIT6", NULL); | |
813 | } else { | |
814 | script_init(ip->client, "PREINIT", NULL); | |
815 | if (ip->client->alias != NULL) | |
816 | script_write_params(ip->client, | |
817 | "alias_", | |
818 | ip->client->alias); | |
819 | } | |
420d8b3f | 820 | script_go(ip->client); |
cc26de46 TL |
821 | } |
822 | } | |
469cf3a4 | 823 | |
cc26de46 TL |
824 | /* At this point, all the interfaces that the script thinks |
825 | are relevant should be running, so now we once again call | |
826 | discover_interfaces(), and this time ask it to actually set | |
827 | up the interfaces. */ | |
420d8b3f FD |
828 | discover_interfaces(interfaces_requested != 0 |
829 | ? DISCOVER_REQUESTED | |
830 | : DISCOVER_RUNNING); | |
cc26de46 | 831 | |
66f973e4 TL |
832 | /* Make up a seed for the random number generator from current |
833 | time plus the sum of the last four bytes of each | |
834 | interface's hardware address interpreted as an integer. | |
835 | Not much entropy, but we're booting, so we're not likely to | |
836 | find anything better. */ | |
02d9e453 | 837 | seed = 0; |
420d8b3f | 838 | for (ip = interfaces; ip; ip = ip->next) { |
66f973e4 | 839 | int junk; |
420d8b3f FD |
840 | memcpy(&junk, |
841 | &ip->hw_address.hbuf[ip->hw_address.hlen - | |
842 | sizeof seed], sizeof seed); | |
66f973e4 TL |
843 | seed += junk; |
844 | } | |
66be0ad1 | 845 | srandom(seed + cur_time + (unsigned)getpid()); |
66f973e4 | 846 | |
d7d9c0c7 SR |
847 | |
848 | /* | |
849 | * Establish a default DUID. We always do so for v6 and | |
850 | * do so if desired for v4 via the -D or -i options | |
851 | */ | |
852 | if ((local_family == AF_INET6) || | |
853 | ((local_family == AF_INET) && (duid_v4 == 1))) { | |
98bd7ca0 DH |
854 | if (default_duid.len == 0) { |
855 | if (default_duid.buffer != NULL) | |
856 | data_string_forget(&default_duid, MDL); | |
857 | ||
858 | form_duid(&default_duid, MDL); | |
859 | write_duid(&default_duid); | |
860 | } | |
d7d9c0c7 | 861 | } |
98bd7ca0 | 862 | |
785c1a51 FD |
863 | #if defined(DHCPv6) && defined(DHCP4o6) |
864 | if (dhcpv4_over_dhcpv6 && !exit_mode) | |
865 | dhcp4o6_setup(dhcp4o6_port); | |
866 | #endif | |
867 | ||
d7d9c0c7 SR |
868 | /* Start a configuration state machine for each interface. */ |
869 | #ifdef DHCPv6 | |
870 | if (local_family == AF_INET6) { | |
98bd7ca0 DH |
871 | for (ip = interfaces ; ip != NULL ; ip = ip->next) { |
872 | for (client = ip->client ; client != NULL ; | |
873 | client = client->next) { | |
3dbe2246 FD |
874 | if (release_mode) { |
875 | start_release6(client); | |
876 | continue; | |
877 | } else if (exit_mode) { | |
878 | unconfigure6(client, "STOP6"); | |
879 | continue; | |
880 | } | |
af5fa176 | 881 | |
98bd7ca0 DH |
882 | /* If we have a previous binding, Confirm |
883 | * that we can (or can't) still use it. | |
884 | */ | |
cabdb9b1 FD |
885 | if ((client->active_lease != NULL) && |
886 | !client->active_lease->released) | |
98bd7ca0 DH |
887 | start_confirm6(client); |
888 | else | |
889 | start_init6(client); | |
890 | } | |
891 | } | |
3dbe2246 | 892 | } else |
fe5b0fdd DH |
893 | #endif /* DHCPv6 */ |
894 | { | |
98bd7ca0 DH |
895 | for (ip = interfaces ; ip ; ip = ip->next) { |
896 | ip->flags |= INTERFACE_RUNNING; | |
897 | for (client = ip->client ; client ; | |
898 | client = client->next) { | |
3dbe2246 FD |
899 | if (exit_mode) |
900 | state_stop(client); | |
785c1a51 | 901 | if (release_mode) |
98bd7ca0 DH |
902 | do_release(client); |
903 | else { | |
904 | client->state = S_INIT; | |
5d082abd TM |
905 | |
906 | if (top_level_config.initial_delay>0) | |
907 | { | |
908 | tv.tv_sec = 0; | |
909 | if (top_level_config. | |
910 | initial_delay>1) | |
911 | tv.tv_sec = cur_time | |
912 | + random() | |
913 | % (top_level_config. | |
914 | initial_delay-1); | |
915 | tv.tv_usec = random() | |
916 | % 1000000; | |
917 | /* | |
918 | * this gives better | |
919 | * distribution than just | |
920 | *whole seconds | |
921 | */ | |
922 | add_timeout(&tv, state_reboot, | |
923 | client, 0, 0); | |
924 | } else { | |
925 | state_reboot(client); | |
926 | } | |
98bd7ca0 | 927 | } |
347de8bd | 928 | } |
02d9e453 | 929 | } |
cc26de46 | 930 | } |
469cf3a4 | 931 | |
87202683 | 932 | if (exit_mode) |
29b23207 | 933 | finish(0); |
87202683 FD |
934 | if (release_mode) { |
935 | #ifndef DHCPv6 | |
29b23207 | 936 | finish(0); |
87202683 | 937 | #else |
785c1a51 | 938 | if ((local_family == AF_INET6) || dhcpv4_over_dhcpv6) { |
87202683 | 939 | if (onetry) |
29b23207 | 940 | finish(0); |
87202683 | 941 | } else |
29b23207 | 942 | finish(0); |
87202683 FD |
943 | #endif /* DHCPv6 */ |
944 | } | |
347de8bd TL |
945 | |
946 | /* Start up a listener for the object management API protocol. */ | |
40a59753 | 947 | if (top_level_config.omapi_port != -1) { |
420d8b3f FD |
948 | listener = NULL; |
949 | result = omapi_generic_new(&listener, MDL); | |
40a59753 | 950 | if (result != ISC_R_SUCCESS) |
420d8b3f FD |
951 | log_fatal("Can't allocate new generic object: %s\n", |
952 | isc_result_totext(result)); | |
953 | result = omapi_protocol_listen(listener, | |
954 | (unsigned) | |
955 | top_level_config.omapi_port, | |
956 | 1); | |
40a59753 | 957 | if (result != ISC_R_SUCCESS) |
420d8b3f FD |
958 | log_fatal("Can't start OMAPI protocol: %s", |
959 | isc_result_totext (result)); | |
40a59753 | 960 | } |
347de8bd | 961 | |
84c4adde TL |
962 | /* Set up the bootp packet handler... */ |
963 | bootp_packet_handler = do_packet; | |
fe5b0fdd | 964 | #ifdef DHCPv6 |
98bd7ca0 | 965 | dhcpv6_packet_handler = do_packet6; |
fe5b0fdd | 966 | #endif /* DHCPv6 */ |
84c4adde | 967 | |
420d8b3f FD |
968 | #if defined(DEBUG_MEMORY_LEAKAGE) || defined(DEBUG_MALLOC_POOL) || \ |
969 | defined(DEBUG_MEMORY_LEAKAGE_ON_EXIT) | |
1c44f6bd TL |
970 | dmalloc_cutoff_generation = dmalloc_generation; |
971 | dmalloc_longterm = dmalloc_outstanding; | |
972 | dmalloc_outstanding = 0; | |
973 | #endif | |
974 | ||
e9326fd0 SR |
975 | #if defined(ENABLE_GENTLE_SHUTDOWN) |
976 | /* no signal handlers until we deal with the side effects */ | |
47e8308d SR |
977 | /* install signal handlers */ |
978 | signal(SIGINT, dhcp_signal_handler); /* control-c */ | |
979 | signal(SIGTERM, dhcp_signal_handler); /* kill */ | |
e9326fd0 | 980 | #endif |
47e8308d | 981 | |
37c1f13f TL |
982 | /* If we're not supposed to wait before getting the address, |
983 | don't. */ | |
984 | if (nowait) | |
29b23207 | 985 | detach(); |
37c1f13f | 986 | |
b1423aed TL |
987 | /* If we're not going to daemonize, write the pid file |
988 | now. */ | |
37c1f13f | 989 | if (no_daemon || nowait) |
420d8b3f | 990 | write_client_pid_file(); |
b1423aed | 991 | |
cc26de46 | 992 | /* Start dispatching packets and timeouts... */ |
420d8b3f | 993 | dispatch(); |
84c4adde | 994 | |
0895c955 | 995 | /* In fact dispatch() never returns. */ |
cc26de46 | 996 | return 0; |
469cf3a4 TL |
997 | } |
998 | ||
785c1a51 FD |
999 | /* |
1000 | * \brief Run the DHCPv6 stateless client (dhclient -6 -S) | |
1001 | * | |
1002 | * \param exist_mode set to 1 when dhclient was called with -x | |
1003 | * \param port DHCPv4-over-DHCPv6 client inter-process communication | |
1004 | * UDP port pair (port,port+1 with port in network byte order) | |
1005 | */ | |
1006 | ||
1007 | void run_stateless(int exit_mode, u_int16_t port) | |
3dbe2246 | 1008 | { |
420d8b3f | 1009 | #ifdef DHCPv6 |
3dbe2246 FD |
1010 | struct client_state *client; |
1011 | omapi_object_t *listener; | |
1012 | isc_result_t result; | |
1013 | ||
785c1a51 FD |
1014 | #ifndef DHCP4o6 |
1015 | IGNORE_UNUSED(port); | |
1016 | #endif | |
1017 | ||
3dbe2246 FD |
1018 | /* Discover the network interface. */ |
1019 | discover_interfaces(DISCOVER_REQUESTED); | |
1020 | ||
1021 | if (!interfaces) | |
b2cb745b | 1022 | usage("No interfaces available for stateless command: %s", "-S"); |
3dbe2246 FD |
1023 | |
1024 | /* Parse the dhclient.conf file. */ | |
785c1a51 FD |
1025 | #ifdef DHCP4o6 |
1026 | if (dhcpv4_over_dhcpv6) { | |
1027 | /* Mark we want to request IRT too! */ | |
1028 | dhcpv4_over_dhcpv6++; | |
1029 | } | |
1030 | #endif | |
3dbe2246 FD |
1031 | read_client_conf(); |
1032 | ||
1033 | /* Parse the lease database. */ | |
1034 | read_client_leases(); | |
1035 | ||
79818c93 SR |
1036 | /* If desired parse the secondary lease database for a DUID */ |
1037 | if ((default_duid.len == 0) && (path_dhclient_duid != NULL)) { | |
1038 | read_client_duid(); | |
1039 | } | |
1040 | ||
3dbe2246 FD |
1041 | /* Establish a default DUID. */ |
1042 | if (default_duid.len == 0) { | |
1043 | if (default_duid.buffer != NULL) | |
1044 | data_string_forget(&default_duid, MDL); | |
1045 | ||
1046 | form_duid(&default_duid, MDL); | |
1047 | } | |
1048 | ||
785c1a51 FD |
1049 | #ifdef DHCP4o6 |
1050 | if (dhcpv4_over_dhcpv6 && !exit_mode) | |
1051 | dhcp4o6_setup(port); | |
1052 | #endif | |
1053 | ||
3dbe2246 FD |
1054 | /* Start a configuration state machine. */ |
1055 | for (client = interfaces->client ; | |
1056 | client != NULL ; | |
1057 | client = client->next) { | |
1058 | if (exit_mode) { | |
1059 | unconfigure6(client, "STOP6"); | |
1060 | continue; | |
1061 | } | |
1062 | start_info_request6(client); | |
1063 | } | |
1064 | if (exit_mode) | |
1065 | return; | |
1066 | ||
1067 | /* Start up a listener for the object management API protocol. */ | |
1068 | if (top_level_config.omapi_port != -1) { | |
420d8b3f | 1069 | listener = NULL; |
3dbe2246 FD |
1070 | result = omapi_generic_new(&listener, MDL); |
1071 | if (result != ISC_R_SUCCESS) | |
1072 | log_fatal("Can't allocate new generic object: %s\n", | |
1073 | isc_result_totext(result)); | |
1074 | result = omapi_protocol_listen(listener, | |
1075 | (unsigned) | |
1076 | top_level_config.omapi_port, | |
1077 | 1); | |
1078 | if (result != ISC_R_SUCCESS) | |
1079 | log_fatal("Can't start OMAPI protocol: %s", | |
1080 | isc_result_totext(result)); | |
1081 | } | |
1082 | ||
1083 | /* Set up the packet handler... */ | |
1084 | dhcpv6_packet_handler = do_packet6; | |
1085 | ||
420d8b3f FD |
1086 | #if defined(DEBUG_MEMORY_LEAKAGE) || defined(DEBUG_MALLOC_POOL) || \ |
1087 | defined(DEBUG_MEMORY_LEAKAGE_ON_EXIT) | |
3dbe2246 FD |
1088 | dmalloc_cutoff_generation = dmalloc_generation; |
1089 | dmalloc_longterm = dmalloc_outstanding; | |
1090 | dmalloc_outstanding = 0; | |
1091 | #endif | |
1092 | ||
1093 | /* If we're not supposed to wait before getting the address, | |
1094 | don't. */ | |
1095 | if (nowait) | |
29b23207 | 1096 | detach(); |
3dbe2246 FD |
1097 | |
1098 | /* If we're not going to daemonize, write the pid file | |
1099 | now. */ | |
1100 | if (no_daemon || nowait) | |
1101 | write_client_pid_file(); | |
1102 | ||
1103 | /* Start dispatching packets and timeouts... */ | |
1104 | dispatch(); | |
1105 | ||
420d8b3f | 1106 | #endif /* DHCPv6 */ |
3dbe2246 FD |
1107 | return; |
1108 | } | |
eda1d0aa | 1109 | #endif /* !UNIT_TEST */ |
3dbe2246 | 1110 | |
20916cae TL |
1111 | isc_result_t find_class (struct class **c, |
1112 | const char *s, const char *file, int line) | |
02a015fb | 1113 | { |
20916cae | 1114 | return 0; |
02a015fb TL |
1115 | } |
1116 | ||
da38df14 | 1117 | int check_collection (packet, lease, collection) |
02a015fb | 1118 | struct packet *packet; |
da38df14 | 1119 | struct lease *lease; |
02a015fb TL |
1120 | struct collection *collection; |
1121 | { | |
1122 | return 0; | |
1123 | } | |
1124 | ||
1125 | void classify (packet, class) | |
1126 | struct packet *packet; | |
1127 | struct class *class; | |
1128 | { | |
1129 | } | |
1130 | ||
6a39bcf0 | 1131 | void unbill_class (lease) |
73530742 | 1132 | struct lease *lease; |
73530742 | 1133 | { |
73530742 TL |
1134 | } |
1135 | ||
20916cae TL |
1136 | int find_subnet (struct subnet **sp, |
1137 | struct iaddr addr, const char *file, int line) | |
bfdb842e | 1138 | { |
20916cae | 1139 | return 0; |
bfdb842e TL |
1140 | } |
1141 | ||
469cf3a4 | 1142 | /* Individual States: |
3dbe2246 | 1143 | * |
469cf3a4 TL |
1144 | * Each routine is called from the dhclient_state_machine() in one of |
1145 | * these conditions: | |
1146 | * -> entering INIT state | |
1147 | * -> recvpacket_flag == 0: timeout in this state | |
1148 | * -> otherwise: received a packet in this state | |
1149 | * | |
1150 | * Return conditions as handled by dhclient_state_machine(): | |
1151 | * Returns 1, sendpacket_flag = 1: send packet, reset timer. | |
1152 | * Returns 1, sendpacket_flag = 0: just reset the timer (wait for a milestone). | |
1153 | * Returns 0: finish the nap which was interrupted for no good reason. | |
1154 | * | |
cc26de46 TL |
1155 | * Several per-interface variables are used to keep track of the process: |
1156 | * active_lease: the lease that is being used on the interface | |
1157 | * (null pointer if not configured yet). | |
1158 | * offered_leases: leases corresponding to DHCPOFFER messages that have | |
1159 | * been sent to us by DHCP servers. | |
1160 | * acked_leases: leases corresponding to DHCPACK messages that have been | |
1161 | * sent to us by DHCP servers. | |
1162 | * sendpacket: DHCP packet we're trying to send. | |
469cf3a4 | 1163 | * destination: IP address to send sendpacket to |
cc26de46 | 1164 | * In addition, there are several relevant per-lease variables. |
469cf3a4 | 1165 | * T1_expiry, T2_expiry, lease_expiry: lease milestones |
cc26de46 TL |
1166 | * In the active lease, these control the process of renewing the lease; |
1167 | * In leases on the acked_leases list, this simply determines when we | |
1168 | * can no longer legitimately use the lease. | |
469cf3a4 TL |
1169 | */ |
1170 | ||
02d9e453 TL |
1171 | void state_reboot (cpp) |
1172 | void *cpp; | |
deff2d59 | 1173 | { |
02d9e453 | 1174 | struct client_state *client = cpp; |
84c4adde | 1175 | |
785c1a51 FD |
1176 | #if defined(DHCPv6) && defined(DHCP4o6) |
1177 | if (dhcpv4_over_dhcpv6 && (dhcp4o6_state <= 0)) { | |
1178 | if (dhcp4o6_state < 0) | |
1179 | dhcp4o6_poll(NULL); | |
1180 | client->pending = P_REBOOT; | |
1181 | return; | |
1182 | } | |
1183 | #endif | |
1184 | ||
1185 | client->pending= P_NONE; | |
1186 | ||
deff2d59 | 1187 | /* If we don't remember an active lease, go straight to INIT. */ |
02d9e453 | 1188 | if (!client -> active || |
d758ad8c TL |
1189 | client -> active -> is_bootp || |
1190 | client -> active -> expiry <= cur_time) { | |
02d9e453 | 1191 | state_init (client); |
deff2d59 TL |
1192 | return; |
1193 | } | |
1194 | ||
1195 | /* We are in the rebooting state. */ | |
02d9e453 | 1196 | client -> state = S_REBOOTING; |
deff2d59 | 1197 | |
420d8b3f FD |
1198 | /* |
1199 | * make_request doesn't initialize xid because it normally comes | |
1200 | * from the DHCPDISCOVER, but we haven't sent a DHCPDISCOVER, | |
1201 | * so pick an xid now. | |
1202 | */ | |
02d9e453 | 1203 | client -> xid = random (); |
5c2f78b4 | 1204 | |
420d8b3f FD |
1205 | /* |
1206 | * Make a DHCPREQUEST packet, and set | |
1207 | * appropriate per-interface flags. | |
1208 | */ | |
02d9e453 TL |
1209 | make_request (client, client -> active); |
1210 | client -> destination = iaddr_broadcast; | |
1211 | client -> first_sending = cur_time; | |
1212 | client -> interval = client -> config -> initial_interval; | |
deff2d59 | 1213 | |
b8cf055d | 1214 | /* Zap the medium list... */ |
420d8b3f | 1215 | client -> medium = NULL; |
b8cf055d TL |
1216 | |
1217 | /* Send out the first DHCPREQUEST packet. */ | |
02d9e453 | 1218 | send_request (client); |
deff2d59 TL |
1219 | } |
1220 | ||
1221 | /* Called when a lease has completely expired and we've been unable to | |
1222 | renew it. */ | |
cc26de46 | 1223 | |
02d9e453 TL |
1224 | void state_init (cpp) |
1225 | void *cpp; | |
469cf3a4 | 1226 | { |
02d9e453 | 1227 | struct client_state *client = cpp; |
84c4adde | 1228 | |
469cf3a4 TL |
1229 | ASSERT_STATE(state, S_INIT); |
1230 | ||
cc26de46 TL |
1231 | /* Make a DHCPDISCOVER packet, and set appropriate per-interface |
1232 | flags. */ | |
02d9e453 TL |
1233 | make_discover (client, client -> active); |
1234 | client -> xid = client -> packet.xid; | |
1235 | client -> destination = iaddr_broadcast; | |
1236 | client -> state = S_SELECTING; | |
1237 | client -> first_sending = cur_time; | |
1238 | client -> interval = client -> config -> initial_interval; | |
cc26de46 TL |
1239 | |
1240 | /* Add an immediate timeout to cause the first DHCPDISCOVER packet | |
1241 | to go out. */ | |
02d9e453 | 1242 | send_discover (client); |
469cf3a4 TL |
1243 | } |
1244 | ||
420d8b3f FD |
1245 | /* |
1246 | * state_selecting is called when one or more DHCPOFFER packets have been | |
1247 | * received and a configurable period of time has passed. | |
1248 | */ | |
cc26de46 | 1249 | |
02d9e453 TL |
1250 | void state_selecting (cpp) |
1251 | void *cpp; | |
469cf3a4 | 1252 | { |
02d9e453 | 1253 | struct client_state *client = cpp; |
b00d3884 TL |
1254 | struct client_lease *lp, *next, *picked; |
1255 | ||
02d9e453 | 1256 | |
469cf3a4 TL |
1257 | ASSERT_STATE(state, S_SELECTING); |
1258 | ||
420d8b3f FD |
1259 | /* |
1260 | * Cancel state_selecting and send_discover timeouts, since either | |
1261 | * one could have got us here. | |
1262 | */ | |
02d9e453 TL |
1263 | cancel_timeout (state_selecting, client); |
1264 | cancel_timeout (send_discover, client); | |
cc26de46 | 1265 | |
420d8b3f FD |
1266 | /* |
1267 | * We have received one or more DHCPOFFER packets. Currently, | |
1268 | * the only criterion by which we judge leases is whether or | |
1269 | * not we get a response when we arp for them. | |
1270 | */ | |
1271 | picked = NULL; | |
02d9e453 | 1272 | for (lp = client -> offered_leases; lp; lp = next) { |
b00d3884 TL |
1273 | next = lp -> next; |
1274 | ||
420d8b3f FD |
1275 | /* |
1276 | * Check to see if we got an ARPREPLY for the address | |
1277 | * in this particular lease. | |
1278 | */ | |
b00d3884 | 1279 | if (!picked) { |
b00d3884 | 1280 | picked = lp; |
420d8b3f | 1281 | picked -> next = NULL; |
b00d3884 | 1282 | } else { |
02a015fb | 1283 | destroy_client_lease (lp); |
b00d3884 TL |
1284 | } |
1285 | } | |
420d8b3f | 1286 | client -> offered_leases = NULL; |
b00d3884 | 1287 | |
420d8b3f FD |
1288 | /* |
1289 | * If we just tossed all the leases we were offered, go back | |
1290 | * to square one. | |
1291 | */ | |
b00d3884 | 1292 | if (!picked) { |
02d9e453 TL |
1293 | client -> state = S_INIT; |
1294 | state_init (client); | |
b00d3884 TL |
1295 | return; |
1296 | } | |
1297 | ||
66f973e4 | 1298 | /* If it was a BOOTREPLY, we can just take the address right now. */ |
2455808f | 1299 | if (picked -> is_bootp) { |
02d9e453 | 1300 | client -> new = picked; |
66f973e4 TL |
1301 | |
1302 | /* Make up some lease expiry times | |
1303 | XXX these should be configurable. */ | |
02d9e453 TL |
1304 | client -> new -> expiry = cur_time + 12000; |
1305 | client -> new -> renewal += cur_time + 8000; | |
1306 | client -> new -> rebind += cur_time + 10000; | |
66f973e4 | 1307 | |
02d9e453 | 1308 | client -> state = S_REQUESTING; |
66f973e4 TL |
1309 | |
1310 | /* Bind to the address we received. */ | |
02d9e453 | 1311 | bind_lease (client); |
66f973e4 TL |
1312 | return; |
1313 | } | |
1314 | ||
b00d3884 | 1315 | /* Go to the REQUESTING state. */ |
02d9e453 TL |
1316 | client -> destination = iaddr_broadcast; |
1317 | client -> state = S_REQUESTING; | |
1318 | client -> first_sending = cur_time; | |
1319 | client -> interval = client -> config -> initial_interval; | |
cc26de46 | 1320 | |
b00d3884 | 1321 | /* Make a DHCPREQUEST packet from the lease we picked. */ |
02d9e453 TL |
1322 | make_request (client, picked); |
1323 | client -> xid = client -> packet.xid; | |
469cf3a4 | 1324 | |
b00d3884 | 1325 | /* Toss the lease we picked - we'll get it back in a DHCPACK. */ |
02a015fb | 1326 | destroy_client_lease (picked); |
b00d3884 | 1327 | |
cc26de46 | 1328 | /* Add an immediate timeout to send the first DHCPREQUEST packet. */ |
02d9e453 | 1329 | send_request (client); |
3dbe2246 | 1330 | } |
469cf3a4 | 1331 | |
cc26de46 TL |
1332 | /* state_requesting is called when we receive a DHCPACK message after |
1333 | having sent out one or more DHCPREQUEST packets. */ | |
469cf3a4 | 1334 | |
cc26de46 TL |
1335 | void dhcpack (packet) |
1336 | struct packet *packet; | |
469cf3a4 | 1337 | { |
cc26de46 | 1338 | struct interface_info *ip = packet -> interface; |
02d9e453 | 1339 | struct client_state *client; |
cc26de46 | 1340 | struct client_lease *lease; |
02a015fb TL |
1341 | struct option_cache *oc; |
1342 | struct data_string ds; | |
3dbe2246 | 1343 | |
cc26de46 TL |
1344 | /* If we're not receptive to an offer right now, or if the offer |
1345 | has an unrecognizable transaction id, then just drop it. */ | |
02d9e453 TL |
1346 | for (client = ip -> client; client; client = client -> next) { |
1347 | if (client -> xid == packet -> raw -> xid) | |
1348 | break; | |
1349 | } | |
1350 | if (!client || | |
31730f17 | 1351 | (packet -> interface -> hw_address.hlen - 1 != |
5c2f78b4 | 1352 | packet -> raw -> hlen) || |
31730f17 | 1353 | (memcmp (&packet -> interface -> hw_address.hbuf [1], |
fcaec4ef | 1354 | packet -> raw -> chaddr, packet -> raw -> hlen))) { |
2d1b06e0 | 1355 | #if defined (DEBUG) |
8ae2d595 | 1356 | log_debug ("DHCPACK in wrong transaction."); |
2d1b06e0 | 1357 | #endif |
cc26de46 | 1358 | return; |
469cf3a4 | 1359 | } |
469cf3a4 | 1360 | |
02d9e453 TL |
1361 | if (client -> state != S_REBOOTING && |
1362 | client -> state != S_REQUESTING && | |
1363 | client -> state != S_RENEWING && | |
1364 | client -> state != S_REBINDING) { | |
2d1b06e0 | 1365 | #if defined (DEBUG) |
8ae2d595 | 1366 | log_debug ("DHCPACK in wrong state."); |
2d1b06e0 | 1367 | #endif |
cc26de46 | 1368 | return; |
469cf3a4 TL |
1369 | } |
1370 | ||
35e86889 TM |
1371 | log_info ("DHCPACK of %s from %s", |
1372 | inet_ntoa(packet->raw->yiaddr), | |
1373 | piaddr (packet->client_addr)); | |
34fdad6c | 1374 | |
6ceb9118 | 1375 | lease = packet_to_lease (packet, client); |
cc26de46 | 1376 | if (!lease) { |
8ae2d595 | 1377 | log_info ("packet_to_lease failed."); |
cc26de46 | 1378 | return; |
469cf3a4 TL |
1379 | } |
1380 | ||
02d9e453 | 1381 | client -> new = lease; |
cc26de46 TL |
1382 | |
1383 | /* Stop resending DHCPREQUEST. */ | |
02d9e453 | 1384 | cancel_timeout (send_request, client); |
cc26de46 TL |
1385 | |
1386 | /* Figure out the lease time. */ | |
230e73e4 | 1387 | oc = lookup_option (&dhcp_universe, client -> new -> options, |
02a015fb TL |
1388 | DHO_DHCP_LEASE_TIME); |
1389 | memset (&ds, 0, sizeof ds); | |
1390 | if (oc && | |
66e9cecf | 1391 | evaluate_option_cache (&ds, packet, (struct lease *)0, client, |
0852a27f | 1392 | packet -> options, client -> new -> options, |
cf78bf20 | 1393 | &global_scope, oc, MDL)) { |
02a015fb | 1394 | if (ds.len > 3) |
02d9e453 | 1395 | client -> new -> expiry = getULong (ds.data); |
02a015fb | 1396 | else |
02d9e453 | 1397 | client -> new -> expiry = 0; |
cf78bf20 | 1398 | data_string_forget (&ds, MDL); |
02a015fb | 1399 | } else |
02d9e453 | 1400 | client -> new -> expiry = 0; |
02a015fb | 1401 | |
5d082abd TM |
1402 | if (client->new->expiry == 0) { |
1403 | struct timeval tv; | |
1404 | ||
8ae2d595 | 1405 | log_error ("no expiry time on offered lease."); |
5d082abd TM |
1406 | |
1407 | /* Quench this (broken) server. Return to INIT to reselect. */ | |
1408 | add_reject(packet); | |
1409 | ||
1410 | /* 1/2 second delay to restart at INIT. */ | |
1411 | tv.tv_sec = cur_tv.tv_sec; | |
1412 | tv.tv_usec = cur_tv.tv_usec + 500000; | |
1413 | ||
1414 | if (tv.tv_usec >= 1000000) { | |
1415 | tv.tv_sec++; | |
1416 | tv.tv_usec -= 1000000; | |
1417 | } | |
1418 | ||
1419 | add_timeout(&tv, state_init, client, 0, 0); | |
02a015fb TL |
1420 | return; |
1421 | } | |
cc26de46 | 1422 | |
5d082abd TM |
1423 | /* |
1424 | * A number that looks negative here is really just very large, | |
1425 | * because the lease expiry offset is unsigned. | |
1426 | */ | |
1427 | if (client->new->expiry < 0) | |
1428 | client->new->expiry = TIME_MAX; | |
1429 | ||
02a015fb | 1430 | /* Take the server-provided renewal time if there is one. */ |
230e73e4 | 1431 | oc = lookup_option (&dhcp_universe, client -> new -> options, |
02a015fb TL |
1432 | DHO_DHCP_RENEWAL_TIME); |
1433 | if (oc && | |
66e9cecf | 1434 | evaluate_option_cache (&ds, packet, (struct lease *)0, client, |
0852a27f | 1435 | packet -> options, client -> new -> options, |
cf78bf20 | 1436 | &global_scope, oc, MDL)) { |
02a015fb | 1437 | if (ds.len > 3) |
02d9e453 | 1438 | client -> new -> renewal = getULong (ds.data); |
02a015fb | 1439 | else |
02d9e453 | 1440 | client -> new -> renewal = 0; |
cf78bf20 | 1441 | data_string_forget (&ds, MDL); |
02a015fb | 1442 | } else |
02d9e453 | 1443 | client -> new -> renewal = 0; |
02a015fb TL |
1444 | |
1445 | /* If it wasn't specified by the server, calculate it. */ | |
02d9e453 | 1446 | if (!client -> new -> renewal) |
98311e4b DH |
1447 | client -> new -> renewal = client -> new -> expiry / 2 + 1; |
1448 | ||
1449 | if (client -> new -> renewal <= 0) | |
1450 | client -> new -> renewal = TIME_MAX; | |
cc26de46 | 1451 | |
11373fb6 | 1452 | /* Now introduce some randomness to the renewal time: */ |
88cd8aca DH |
1453 | if (client->new->renewal <= ((TIME_MAX / 3) - 3)) |
1454 | client->new->renewal = (((client->new->renewal * 3) + 3) / 4) + | |
1455 | (((random() % client->new->renewal) + 3) / 4); | |
11373fb6 | 1456 | |
cc26de46 | 1457 | /* Same deal with the rebind time. */ |
230e73e4 | 1458 | oc = lookup_option (&dhcp_universe, client -> new -> options, |
02a015fb TL |
1459 | DHO_DHCP_REBINDING_TIME); |
1460 | if (oc && | |
66e9cecf | 1461 | evaluate_option_cache (&ds, packet, (struct lease *)0, client, |
0852a27f | 1462 | packet -> options, client -> new -> options, |
cf78bf20 | 1463 | &global_scope, oc, MDL)) { |
02a015fb | 1464 | if (ds.len > 3) |
02d9e453 | 1465 | client -> new -> rebind = getULong (ds.data); |
02a015fb | 1466 | else |
02d9e453 | 1467 | client -> new -> rebind = 0; |
cf78bf20 | 1468 | data_string_forget (&ds, MDL); |
02a015fb | 1469 | } else |
02d9e453 | 1470 | client -> new -> rebind = 0; |
02a015fb | 1471 | |
98311e4b DH |
1472 | if (client -> new -> rebind <= 0) { |
1473 | if (client -> new -> expiry <= TIME_MAX / 7) | |
1474 | client -> new -> rebind = | |
1475 | client -> new -> expiry * 7 / 8; | |
1476 | else | |
1477 | client -> new -> rebind = | |
1478 | client -> new -> expiry / 8 * 7; | |
1479 | } | |
11373fb6 TL |
1480 | |
1481 | /* Make sure our randomness didn't run the renewal time past the | |
1482 | rebind time. */ | |
98311e4b DH |
1483 | if (client -> new -> renewal > client -> new -> rebind) { |
1484 | if (client -> new -> rebind <= TIME_MAX / 3) | |
1485 | client -> new -> renewal = | |
1486 | client -> new -> rebind * 3 / 4; | |
1487 | else | |
1488 | client -> new -> renewal = | |
1489 | client -> new -> rebind / 4 * 3; | |
1490 | } | |
cc26de46 | 1491 | |
02d9e453 | 1492 | client -> new -> expiry += cur_time; |
62d0cb47 TL |
1493 | /* Lease lengths can never be negative. */ |
1494 | if (client -> new -> expiry < cur_time) | |
1495 | client -> new -> expiry = TIME_MAX; | |
02d9e453 | 1496 | client -> new -> renewal += cur_time; |
62d0cb47 TL |
1497 | if (client -> new -> renewal < cur_time) |
1498 | client -> new -> renewal = TIME_MAX; | |
02d9e453 | 1499 | client -> new -> rebind += cur_time; |
62d0cb47 TL |
1500 | if (client -> new -> rebind < cur_time) |
1501 | client -> new -> rebind = TIME_MAX; | |
cc26de46 | 1502 | |
02d9e453 | 1503 | bind_lease (client); |
66f973e4 TL |
1504 | } |
1505 | ||
02d9e453 TL |
1506 | void bind_lease (client) |
1507 | struct client_state *client; | |
66f973e4 | 1508 | { |
be62cf06 FD |
1509 | struct timeval tv; |
1510 | ||
9bdb9271 | 1511 | /* Remember the medium. */ |
02b0bdc3 | 1512 | client->new->medium = client->medium; |
9bdb9271 | 1513 | |
cc26de46 | 1514 | /* Run the client script with the new parameters. */ |
02b0bdc3 | 1515 | script_init(client, (client->state == S_REQUESTING ? "BOUND" : |
cca6a648 | 1516 | (client->state == S_RENEWING ? "RENEW" : |
02b0bdc3 SR |
1517 | (client->state == S_REBOOTING ? "REBOOT" : |
1518 | "REBIND"))), | |
1519 | client->new->medium); | |
1520 | if (client->active && client->state != S_REBOOTING) | |
1521 | script_write_params(client, "old_", client->active); | |
27be804f | 1522 | script_write_params(client, "new_", client->new); |
10613724 | 1523 | script_write_requested(client); |
02b0bdc3 SR |
1524 | if (client->alias) |
1525 | script_write_params(client, "alias_", client->alias); | |
e16f4c3e TL |
1526 | |
1527 | /* If the BOUND/RENEW code detects another machine using the | |
1528 | offered address, it exits nonzero. We need to send a | |
1529 | DHCPDECLINE and toss the lease. */ | |
02b0bdc3 SR |
1530 | if (script_go(client)) { |
1531 | make_decline(client, client->new); | |
1532 | send_decline(client); | |
1533 | destroy_client_lease(client->new); | |
1534 | client->new = NULL; | |
1535 | if (onetry) { | |
5c03ed37 | 1536 | if (!quiet) { |
02b0bdc3 SR |
1537 | log_info("Unable to obtain a lease on first " |
1538 | "try (declined). Exiting."); | |
5c03ed37 | 1539 | } |
c788d4f8 | 1540 | |
5c03ed37 | 1541 | #if defined (CALL_SCRIPT_ON_ONETRY_FAIL) |
c788d4f8 TM |
1542 | /* Let's call a script and we're done */ |
1543 | script_init(client, "FAIL", (struct string_list *)0); | |
1544 | script_go(client); | |
5c03ed37 | 1545 | #endif |
29b23207 | 1546 | finish(2); |
02b0bdc3 | 1547 | } else { |
3e88222f TM |
1548 | struct timeval tv; |
1549 | tv.tv_sec = cur_tv.tv_sec + decline_wait_time; | |
1550 | tv.tv_usec = cur_tv.tv_usec; | |
1551 | add_timeout(&tv, state_init, client, 0, 0); | |
02b0bdc3 SR |
1552 | return; |
1553 | } | |
e16f4c3e TL |
1554 | } |
1555 | ||
5d082abd TM |
1556 | /* Write out the new lease if it has been long enough. */ |
1557 | if (!client->last_write || | |
1558 | (cur_time - client->last_write) >= MIN_LEASE_WRITE) | |
8a2e40cf | 1559 | write_client_lease(client, client->new, 0, 1); |
cc26de46 TL |
1560 | |
1561 | /* Replace the old active lease with the new one. */ | |
02b0bdc3 SR |
1562 | if (client->active) |
1563 | destroy_client_lease(client->active); | |
1564 | client->active = client->new; | |
1565 | client->new = NULL; | |
cc26de46 TL |
1566 | |
1567 | /* Set up a timeout to start the renewal process. */ | |
5d082abd TM |
1568 | tv.tv_sec = client->active->renewal; |
1569 | tv.tv_usec = ((client->active->renewal - cur_tv.tv_sec) > 1) ? | |
1570 | random() % 1000000 : cur_tv.tv_usec; | |
1571 | add_timeout(&tv, state_bound, client, 0, 0); | |
cc26de46 | 1572 | |
02b0bdc3 SR |
1573 | log_info("bound to %s -- renewal in %ld seconds.", |
1574 | piaddr(client->active->address), | |
1575 | (long)(client->active->renewal - cur_time)); | |
1576 | client->state = S_BOUND; | |
1577 | reinitialize_interfaces(); | |
29b23207 | 1578 | detach(); |
98bf1607 | 1579 | #if defined (NSUPDATE) |
98bd7ca0 | 1580 | if (client->config->do_forward_update) |
98bf1607 SR |
1581 | dhclient_schedule_updates(client, &client->active->address, 1); |
1582 | #endif | |
3dbe2246 | 1583 | } |
469cf3a4 | 1584 | |
cc26de46 TL |
1585 | /* state_bound is called when we've successfully bound to a particular |
1586 | lease, but the renewal time on that lease has expired. We are | |
1587 | expected to unicast a DHCPREQUEST to the server that gave us our | |
1588 | original lease. */ | |
469cf3a4 | 1589 | |
02d9e453 TL |
1590 | void state_bound (cpp) |
1591 | void *cpp; | |
469cf3a4 | 1592 | { |
02d9e453 | 1593 | struct client_state *client = cpp; |
02a015fb TL |
1594 | struct option_cache *oc; |
1595 | struct data_string ds; | |
84c4adde | 1596 | |
cc26de46 | 1597 | ASSERT_STATE(state, S_BOUND); |
469cf3a4 | 1598 | |
cc26de46 | 1599 | /* T1 has expired. */ |
02d9e453 TL |
1600 | make_request (client, client -> active); |
1601 | client -> xid = client -> packet.xid; | |
469cf3a4 | 1602 | |
02a015fb | 1603 | memset (&ds, 0, sizeof ds); |
230e73e4 | 1604 | oc = lookup_option (&dhcp_universe, client -> active -> options, |
02a015fb TL |
1605 | DHO_DHCP_SERVER_IDENTIFIER); |
1606 | if (oc && | |
0852a27f | 1607 | evaluate_option_cache (&ds, (struct packet *)0, (struct lease *)0, |
66e9cecf | 1608 | client, (struct option_state *)0, |
da38df14 | 1609 | client -> active -> options, |
cf78bf20 | 1610 | &global_scope, oc, MDL)) { |
02a015fb | 1611 | if (ds.len > 3) { |
02d9e453 TL |
1612 | memcpy (client -> destination.iabuf, ds.data, 4); |
1613 | client -> destination.len = 4; | |
02a015fb | 1614 | } else |
02d9e453 | 1615 | client -> destination = iaddr_broadcast; |
98311e4b DH |
1616 | |
1617 | data_string_forget (&ds, MDL); | |
cc26de46 | 1618 | } else |
02d9e453 | 1619 | client -> destination = iaddr_broadcast; |
469cf3a4 | 1620 | |
02d9e453 TL |
1621 | client -> first_sending = cur_time; |
1622 | client -> interval = client -> config -> initial_interval; | |
1623 | client -> state = S_RENEWING; | |
cc26de46 TL |
1624 | |
1625 | /* Send the first packet immediately. */ | |
02d9e453 | 1626 | send_request (client); |
3dbe2246 | 1627 | } |
469cf3a4 | 1628 | |
d758ad8c TL |
1629 | /* state_stop is called when we've been told to shut down. We unconfigure |
1630 | the interfaces, and then stop operating until told otherwise. */ | |
1631 | ||
1632 | void state_stop (cpp) | |
1633 | void *cpp; | |
1634 | { | |
1635 | struct client_state *client = cpp; | |
d758ad8c | 1636 | |
785c1a51 FD |
1637 | client->pending = P_NONE; |
1638 | ||
d758ad8c | 1639 | /* Cancel all timeouts. */ |
af5fa176 EH |
1640 | cancel_timeout(state_selecting, client); |
1641 | cancel_timeout(send_discover, client); | |
1642 | cancel_timeout(send_request, client); | |
1643 | cancel_timeout(state_bound, client); | |
d758ad8c TL |
1644 | |
1645 | /* If we have an address, unconfigure it. */ | |
af5fa176 EH |
1646 | if (client->active) { |
1647 | script_init(client, "STOP", client->active->medium); | |
1648 | script_write_params(client, "old_", client->active); | |
10613724 | 1649 | script_write_requested(client); |
af5fa176 EH |
1650 | if (client->alias) |
1651 | script_write_params(client, "alias_", client->alias); | |
1652 | script_go(client); | |
d758ad8c | 1653 | } |
3dbe2246 | 1654 | } |
d758ad8c | 1655 | |
c1503c57 TL |
1656 | int commit_leases () |
1657 | { | |
1658 | return 0; | |
1659 | } | |
1660 | ||
1661 | int write_lease (lease) | |
1662 | struct lease *lease; | |
1663 | { | |
1664 | return 0; | |
95821729 TL |
1665 | } |
1666 | ||
628beb0e TL |
1667 | int write_host (host) |
1668 | struct host_decl *host; | |
1669 | { | |
1670 | return 0; | |
1671 | } | |
1672 | ||
7d7a35fa TL |
1673 | void db_startup (testp) |
1674 | int testp; | |
c1503c57 TL |
1675 | { |
1676 | } | |
1677 | ||
1678 | void bootp (packet) | |
1679 | struct packet *packet; | |
1680 | { | |
febbd402 DH |
1681 | struct iaddrmatchlist *ap; |
1682 | char addrbuf[4*16]; | |
1683 | char maskbuf[4*16]; | |
fa2b3e59 TL |
1684 | |
1685 | if (packet -> raw -> op != BOOTREPLY) | |
1686 | return; | |
1687 | ||
1688 | /* If there's a reject list, make sure this packet's sender isn't | |
1689 | on it. */ | |
1690 | for (ap = packet -> interface -> client -> config -> reject_list; | |
1691 | ap; ap = ap -> next) { | |
febbd402 DH |
1692 | if (addr_match(&packet->client_addr, &ap->match)) { |
1693 | ||
1694 | /* piaddr() returns its result in a static | |
1695 | buffer sized 4*16 (see common/inet.c). */ | |
1696 | ||
1697 | strcpy(addrbuf, piaddr(ap->match.addr)); | |
1698 | strcpy(maskbuf, piaddr(ap->match.mask)); | |
1699 | ||
1700 | log_info("BOOTREPLY from %s rejected by rule %s " | |
1701 | "mask %s.", piaddr(packet->client_addr), | |
1702 | addrbuf, maskbuf); | |
fa2b3e59 TL |
1703 | return; |
1704 | } | |
1705 | } | |
3dbe2246 | 1706 | |
fa2b3e59 | 1707 | dhcpoffer (packet); |
66f973e4 | 1708 | |
c1503c57 | 1709 | } |
95821729 | 1710 | |
c1503c57 TL |
1711 | void dhcp (packet) |
1712 | struct packet *packet; | |
95821729 | 1713 | { |
febbd402 | 1714 | struct iaddrmatchlist *ap; |
a34feb7d | 1715 | void (*handler) (struct packet *); |
b1b7b521 | 1716 | const char *type; |
febbd402 DH |
1717 | char addrbuf[4*16]; |
1718 | char maskbuf[4*16]; | |
fa2b3e59 | 1719 | |
c1503c57 TL |
1720 | switch (packet -> packet_type) { |
1721 | case DHCPOFFER: | |
fa2b3e59 TL |
1722 | handler = dhcpoffer; |
1723 | type = "DHCPOFFER"; | |
95821729 | 1724 | break; |
c1503c57 TL |
1725 | |
1726 | case DHCPNAK: | |
fa2b3e59 TL |
1727 | handler = dhcpnak; |
1728 | type = "DHCPNACK"; | |
c1503c57 TL |
1729 | break; |
1730 | ||
1731 | case DHCPACK: | |
fa2b3e59 TL |
1732 | handler = dhcpack; |
1733 | type = "DHCPACK"; | |
c1503c57 TL |
1734 | break; |
1735 | ||
95821729 | 1736 | default: |
fa2b3e59 TL |
1737 | return; |
1738 | } | |
1739 | ||
1740 | /* If there's a reject list, make sure this packet's sender isn't | |
1741 | on it. */ | |
1742 | for (ap = packet -> interface -> client -> config -> reject_list; | |
1743 | ap; ap = ap -> next) { | |
febbd402 DH |
1744 | if (addr_match(&packet->client_addr, &ap->match)) { |
1745 | ||
1746 | /* piaddr() returns its result in a static | |
1747 | buffer sized 4*16 (see common/inet.c). */ | |
1748 | ||
1749 | strcpy(addrbuf, piaddr(ap->match.addr)); | |
1750 | strcpy(maskbuf, piaddr(ap->match.mask)); | |
1751 | ||
1752 | log_info("%s from %s rejected by rule %s mask %s.", | |
1753 | type, piaddr(packet->client_addr), | |
1754 | addrbuf, maskbuf); | |
fa2b3e59 TL |
1755 | return; |
1756 | } | |
95821729 | 1757 | } |
fa2b3e59 | 1758 | (*handler) (packet); |
95821729 TL |
1759 | } |
1760 | ||
fe5b0fdd | 1761 | #ifdef DHCPv6 |
3dbe2246 | 1762 | void |
98bd7ca0 DH |
1763 | dhcpv6(struct packet *packet) { |
1764 | struct iaddrmatchlist *ap; | |
1765 | struct client_state *client; | |
1766 | char addrbuf[sizeof("ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff")]; | |
1767 | ||
1768 | /* Silently drop bogus messages. */ | |
1769 | if (packet->dhcpv6_msg_type >= dhcpv6_type_name_max) | |
1770 | return; | |
1771 | ||
1772 | /* Discard, with log, packets from quenched sources. */ | |
1773 | for (ap = packet->interface->client->config->reject_list ; | |
1774 | ap ; ap = ap->next) { | |
1775 | if (addr_match(&packet->client_addr, &ap->match)) { | |
1776 | strcpy(addrbuf, piaddr(packet->client_addr)); | |
1777 | log_info("%s from %s rejected by rule %s", | |
1778 | dhcpv6_type_names[packet->dhcpv6_msg_type], | |
1779 | addrbuf, | |
1780 | piaddrmask(&ap->match.addr, &ap->match.mask)); | |
1781 | return; | |
1782 | } | |
1783 | } | |
1784 | ||
1785 | /* Screen out nonsensical messages. */ | |
1786 | switch(packet->dhcpv6_msg_type) { | |
785c1a51 FD |
1787 | #ifdef DHCP4o6 |
1788 | case DHCPV6_DHCPV4_RESPONSE: | |
1789 | if (dhcpv4_over_dhcpv6) { | |
1790 | log_info("RCV: %s message on %s from %s.", | |
1791 | dhcpv6_type_names[packet->dhcpv6_msg_type], | |
1792 | packet->interface->name, | |
1793 | piaddr(packet->client_addr)); | |
1794 | forw_dhcpv4_response(packet); | |
1795 | } | |
1796 | return; | |
1797 | #endif | |
98bd7ca0 | 1798 | case DHCPV6_ADVERTISE: |
98bd7ca0 | 1799 | case DHCPV6_RECONFIGURE: |
3dbe2246 FD |
1800 | if (stateless) |
1801 | return; | |
1802 | /* Falls through */ | |
1803 | case DHCPV6_REPLY: | |
98bd7ca0 DH |
1804 | log_info("RCV: %s message on %s from %s.", |
1805 | dhcpv6_type_names[packet->dhcpv6_msg_type], | |
1806 | packet->interface->name, piaddr(packet->client_addr)); | |
1807 | break; | |
1808 | ||
1809 | default: | |
1810 | return; | |
1811 | } | |
1812 | ||
1813 | /* Find a client state that matches the incoming XID. */ | |
1814 | for (client = packet->interface->client ; client ; | |
1815 | client = client->next) { | |
1816 | if (memcmp(&client->dhcpv6_transaction_id, | |
1817 | packet->dhcpv6_transaction_id, 3) == 0) { | |
1818 | client->v6_handler(packet, client); | |
1819 | return; | |
1820 | } | |
1821 | } | |
1822 | ||
20ae1aff | 1823 | /* XXX: temporary log for debugging */ |
98bd7ca0 DH |
1824 | log_info("Packet received, but nothing done with it."); |
1825 | } | |
785c1a51 FD |
1826 | |
1827 | #ifdef DHCP4o6 | |
1828 | /* | |
1829 | * \brief Forward a DHCPv4-response to the DHCPv4 client. | |
1830 | * (DHCPv6 client function) | |
1831 | * | |
1832 | * The DHCPv6 client receives a DHCPv4-response which is forwarded | |
1833 | * to the DHCPv4 client. | |
1834 | * Format: address:16 + DHCPv4 message content | |
1835 | * (we have no state to keep the address so it is transported in | |
1836 | * DHCPv6 <-> DHCPv6 inter-process messages) | |
1837 | * | |
1838 | * \param packet the DHCPv4-response packet | |
1839 | */ | |
1840 | static void forw_dhcpv4_response(struct packet *packet) | |
1841 | { | |
1842 | struct option_cache *oc; | |
1843 | struct data_string enc_opt_data; | |
1844 | struct data_string ds; | |
1845 | int cc; | |
1846 | ||
1847 | /* | |
1848 | * Discard if relay is not ready. | |
1849 | */ | |
1850 | if (dhcp4o6_state == -1) { | |
1851 | log_info("forw_dhcpv4_response: not ready."); | |
1852 | return; | |
1853 | } | |
1854 | ||
1855 | if (packet->client_addr.len != 16) { | |
1856 | log_error("forw_dhcpv4_response: bad address"); | |
1857 | return; | |
1858 | } | |
1859 | ||
1860 | /* | |
1861 | * Get our encapsulated DHCPv4 message. | |
1862 | */ | |
1863 | oc = lookup_option(&dhcpv6_universe, packet->options, D6O_DHCPV4_MSG); | |
1864 | if (oc == NULL) { | |
1865 | log_info("DHCPv4-response from %s missing " | |
1866 | "DHCPv4 Message option.", | |
1867 | piaddr(packet->client_addr)); | |
1868 | return; | |
1869 | } | |
1870 | ||
1871 | memset(&enc_opt_data, 0, sizeof(enc_opt_data)); | |
1872 | if (!evaluate_option_cache(&enc_opt_data, NULL, NULL, NULL, | |
1873 | NULL, NULL, &global_scope, oc, MDL)) { | |
1874 | log_error("forw_dhcpv4_response: error evaluating " | |
1875 | "DHCPv4 message."); | |
1876 | data_string_forget(&enc_opt_data, MDL); | |
1877 | return; | |
1878 | } | |
1879 | ||
1880 | if (enc_opt_data.len < DHCP_FIXED_NON_UDP) { | |
1881 | log_error("forw_dhcpv4_response: " | |
1882 | "no memory for encapsulated packet."); | |
1883 | data_string_forget(&enc_opt_data, MDL); | |
1884 | return; | |
1885 | } | |
1886 | ||
1887 | /* | |
1888 | * Append address. | |
1889 | */ | |
1890 | memset(&ds, 0, sizeof(ds)); | |
1891 | if (!buffer_allocate(&ds.buffer, enc_opt_data.len + 16, MDL)) { | |
1892 | log_error("forw_dhcpv4_response: no memory buffer."); | |
1893 | data_string_forget(&enc_opt_data, MDL); | |
1894 | return; | |
1895 | } | |
1896 | ds.data = ds.buffer->data; | |
1897 | ds.len = enc_opt_data.len + 16; | |
1898 | memcpy(ds.buffer->data, enc_opt_data.data, enc_opt_data.len); | |
1899 | memcpy(ds.buffer->data + enc_opt_data.len, | |
1900 | packet->client_addr.iabuf, 16); | |
1901 | data_string_forget(&enc_opt_data, MDL); | |
1902 | ||
1903 | /* | |
1904 | * Forward them. | |
1905 | */ | |
1906 | cc = send(dhcp4o6_fd, ds.data, ds.len, 0); | |
1907 | if (cc < 0) | |
1908 | log_error("forw_dhcpv4_response: send(): %m"); | |
1909 | ||
1910 | data_string_forget(&ds, MDL); | |
1911 | } | |
1912 | ||
1913 | /* | |
1914 | * \brief Receive a DHCPv4-response from the DHCPv6 client. | |
1915 | * (DHCPv4 client function) | |
1916 | * | |
1917 | * The DHCPv4 client receives a DHCPv4-response forwarded | |
1918 | * by the DHCPv6 client (using \ref forw_dhcpv4_response()) | |
1919 | * | |
1920 | * \param raw the DHCPv4-response raw packet | |
1921 | */ | |
1922 | static void recv_dhcpv4_response(struct data_string *raw) | |
1923 | { | |
1924 | struct packet *packet; | |
1925 | struct iaddr from; | |
1926 | ||
1927 | if (interfaces == NULL) { | |
1928 | log_error("recv_dhcpv4_response: no interfaces."); | |
1929 | return; | |
1930 | } | |
1931 | ||
1932 | from.len = 16; | |
1933 | memcpy(from.iabuf, raw->data + (raw->len - 16), 16); | |
1934 | ||
1935 | /* | |
1936 | * Build a packet structure. | |
1937 | */ | |
1938 | packet = NULL; | |
1939 | if (!packet_allocate(&packet, MDL)) { | |
1940 | log_error("recv_dhcpv4_response: no memory for packet."); | |
1941 | return; | |
1942 | } | |
1943 | ||
1944 | packet->raw = (struct dhcp_packet *) raw->data; | |
1945 | packet->packet_length = raw->len - 16; | |
1946 | packet->client_port = remote_port; | |
1947 | packet->client_addr = from; | |
1948 | interface_reference(&packet->interface, interfaces, MDL); | |
1949 | ||
1950 | /* Allocate packet->options now so it is non-null for all packets */ | |
1951 | if (!option_state_allocate (&packet->options, MDL)) { | |
1952 | log_error("recv_dhcpv4_response: no memory for options."); | |
1953 | packet_dereference (&packet, MDL); | |
1954 | return; | |
1955 | } | |
1956 | ||
1957 | /* If there's an option buffer, try to parse it. */ | |
1958 | if (packet->packet_length >= DHCP_FIXED_NON_UDP + 4) { | |
1959 | struct option_cache *op; | |
1960 | if (!parse_options(packet)) { | |
1961 | if (packet->options) | |
1962 | option_state_dereference | |
1963 | (&packet->options, MDL); | |
1964 | packet_dereference (&packet, MDL); | |
1965 | return; | |
1966 | } | |
1967 | ||
1968 | if (packet->options_valid && | |
1969 | (op = lookup_option(&dhcp_universe, | |
1970 | packet->options, | |
1971 | DHO_DHCP_MESSAGE_TYPE))) { | |
1972 | struct data_string dp; | |
1973 | memset(&dp, 0, sizeof dp); | |
1974 | evaluate_option_cache(&dp, packet, NULL, NULL, | |
1975 | packet->options, NULL, | |
1976 | NULL, op, MDL); | |
1977 | if (dp.len > 0) | |
1978 | packet->packet_type = dp.data[0]; | |
1979 | else | |
1980 | packet->packet_type = 0; | |
1981 | data_string_forget(&dp, MDL); | |
1982 | } | |
1983 | } | |
1984 | ||
1985 | if (validate_packet(packet) != 0) { | |
1986 | if (packet->packet_type) | |
1987 | dhcp(packet); | |
1988 | else | |
1989 | bootp(packet); | |
1990 | } | |
1991 | ||
1992 | /* If the caller kept the packet, they'll have upped the refcnt. */ | |
1993 | packet_dereference(&packet, MDL); | |
1994 | } | |
1995 | #endif /* DHCP4o6 */ | |
fe5b0fdd | 1996 | #endif /* DHCPv6 */ |
98bd7ca0 | 1997 | |
c1503c57 TL |
1998 | void dhcpoffer (packet) |
1999 | struct packet *packet; | |
95821729 | 2000 | { |
cc26de46 | 2001 | struct interface_info *ip = packet -> interface; |
02d9e453 | 2002 | struct client_state *client; |
b00d3884 | 2003 | struct client_lease *lease, *lp; |
0c20eab3 | 2004 | struct option **req; |
cc26de46 | 2005 | int i; |
e16f4c3e | 2006 | int stop_selecting; |
b1b7b521 | 2007 | const char *name = packet -> packet_type ? "DHCPOFFER" : "BOOTREPLY"; |
d758ad8c | 2008 | char obuf [1024]; |
be62cf06 | 2009 | struct timeval tv; |
3dbe2246 | 2010 | |
cc26de46 | 2011 | #ifdef DEBUG_PACKET |
c1503c57 | 2012 | dump_packet (packet); |
3dbe2246 | 2013 | #endif |
cc26de46 | 2014 | |
02d9e453 TL |
2015 | /* Find a client state that matches the xid... */ |
2016 | for (client = ip -> client; client; client = client -> next) | |
2017 | if (client -> xid == packet -> raw -> xid) | |
2018 | break; | |
2019 | ||
cc26de46 TL |
2020 | /* If we're not receptive to an offer right now, or if the offer |
2021 | has an unrecognizable transaction id, then just drop it. */ | |
02d9e453 | 2022 | if (!client || |
73530742 | 2023 | client -> state != S_SELECTING || |
31730f17 | 2024 | (packet -> interface -> hw_address.hlen - 1 != |
fcaec4ef | 2025 | packet -> raw -> hlen) || |
31730f17 | 2026 | (memcmp (&packet -> interface -> hw_address.hbuf [1], |
fcaec4ef | 2027 | packet -> raw -> chaddr, packet -> raw -> hlen))) { |
2d1b06e0 | 2028 | #if defined (DEBUG) |
8ae2d595 | 2029 | log_debug ("%s in wrong transaction.", name); |
2d1b06e0 | 2030 | #endif |
cc26de46 TL |
2031 | return; |
2032 | } | |
2033 | ||
35e86889 TM |
2034 | sprintf (obuf, "%s of %s from %s", name, |
2035 | inet_ntoa(packet->raw->yiaddr), | |
2036 | piaddr(packet->client_addr)); | |
b8cf055d | 2037 | |
0c20eab3 DH |
2038 | /* If this lease doesn't supply the minimum required DHCPv4 parameters, |
2039 | * ignore it. | |
2040 | */ | |
2041 | req = client->config->required_options; | |
2042 | if (req != NULL) { | |
2043 | for (i = 0 ; req[i] != NULL ; i++) { | |
2044 | if ((req[i]->universe == &dhcp_universe) && | |
2045 | !lookup_option(&dhcp_universe, packet->options, | |
2046 | req[i]->code)) { | |
2047 | struct option *option = NULL; | |
2048 | unsigned code = req[i]->code; | |
2049 | ||
2050 | option_code_hash_lookup(&option, | |
2051 | dhcp_universe.code_hash, | |
2052 | &code, 0, MDL); | |
2053 | ||
2054 | if (option) | |
2055 | log_info("%s: no %s option.", obuf, | |
2056 | option->name); | |
2057 | else | |
2058 | log_info("%s: no unknown-%u option.", | |
2059 | obuf, code); | |
f7fdb216 | 2060 | |
0c20eab3 | 2061 | option_dereference(&option, MDL); |
f7fdb216 | 2062 | |
0c20eab3 DH |
2063 | return; |
2064 | } | |
cc26de46 TL |
2065 | } |
2066 | } | |
2067 | ||
2068 | /* If we've already seen this lease, don't record it again. */ | |
02d9e453 | 2069 | for (lease = client -> offered_leases; lease; lease = lease -> next) { |
cc26de46 TL |
2070 | if (lease -> address.len == sizeof packet -> raw -> yiaddr && |
2071 | !memcmp (lease -> address.iabuf, | |
2072 | &packet -> raw -> yiaddr, lease -> address.len)) { | |
d758ad8c | 2073 | log_debug ("%s: already seen.", obuf); |
cc26de46 TL |
2074 | return; |
2075 | } | |
2076 | } | |
2077 | ||
6ceb9118 | 2078 | lease = packet_to_lease (packet, client); |
cc26de46 | 2079 | if (!lease) { |
d758ad8c | 2080 | log_info ("%s: packet_to_lease failed.", obuf); |
cc26de46 TL |
2081 | return; |
2082 | } | |
2083 | ||
35e86889 TM |
2084 | /* log it now, so it emits before the request goes out */ |
2085 | log_info("%s", obuf); | |
2086 | ||
66f973e4 TL |
2087 | /* If this lease was acquired through a BOOTREPLY, record that |
2088 | fact. */ | |
02a015fb | 2089 | if (!packet -> options_valid || !packet -> packet_type) |
66f973e4 TL |
2090 | lease -> is_bootp = 1; |
2091 | ||
9bdb9271 | 2092 | /* Record the medium under which this lease was offered. */ |
02d9e453 | 2093 | lease -> medium = client -> medium; |
9bdb9271 | 2094 | |
b00d3884 | 2095 | /* Figure out when we're supposed to stop selecting. */ |
02d9e453 TL |
2096 | stop_selecting = (client -> first_sending + |
2097 | client -> config -> select_interval); | |
b00d3884 TL |
2098 | |
2099 | /* If this is the lease we asked for, put it at the head of the | |
2100 | list, and don't mess with the arp request timeout. */ | |
02d9e453 | 2101 | if (lease -> address.len == client -> requested_address.len && |
b00d3884 | 2102 | !memcmp (lease -> address.iabuf, |
02d9e453 TL |
2103 | client -> requested_address.iabuf, |
2104 | client -> requested_address.len)) { | |
2105 | lease -> next = client -> offered_leases; | |
2106 | client -> offered_leases = lease; | |
b00d3884 | 2107 | } else { |
b00d3884 TL |
2108 | /* Put the lease at the end of the list. */ |
2109 | lease -> next = (struct client_lease *)0; | |
02d9e453 TL |
2110 | if (!client -> offered_leases) |
2111 | client -> offered_leases = lease; | |
b00d3884 | 2112 | else { |
02d9e453 | 2113 | for (lp = client -> offered_leases; lp -> next; |
b00d3884 TL |
2114 | lp = lp -> next) |
2115 | ; | |
2116 | lp -> next = lease; | |
2117 | } | |
2118 | } | |
2119 | ||
cc26de46 TL |
2120 | /* If the selecting interval has expired, go immediately to |
2121 | state_selecting(). Otherwise, time out into | |
2122 | state_selecting at the select interval. */ | |
5d082abd | 2123 | if (stop_selecting <= cur_tv.tv_sec) |
d758ad8c | 2124 | state_selecting (client); |
84c4adde | 2125 | else { |
5d082abd TM |
2126 | tv.tv_sec = stop_selecting; |
2127 | tv.tv_usec = cur_tv.tv_usec; | |
2128 | add_timeout(&tv, state_selecting, client, 0, 0); | |
2129 | cancel_timeout(send_discover, client); | |
84c4adde | 2130 | } |
95821729 | 2131 | } |
e581d615 | 2132 | |
cc26de46 TL |
2133 | /* Allocate a client_lease structure and initialize it from the parameters |
2134 | in the specified packet. */ | |
2135 | ||
6ceb9118 | 2136 | struct client_lease *packet_to_lease (packet, client) |
c1503c57 | 2137 | struct packet *packet; |
6ceb9118 | 2138 | struct client_state *client; |
e581d615 | 2139 | { |
cc26de46 | 2140 | struct client_lease *lease; |
b5f904a9 | 2141 | unsigned i; |
02a015fb | 2142 | struct option_cache *oc; |
f7fdb216 | 2143 | struct option *option = NULL; |
02a015fb | 2144 | struct data_string data; |
cc26de46 | 2145 | |
cf78bf20 | 2146 | lease = (struct client_lease *)new_client_lease (MDL); |
cc26de46 TL |
2147 | |
2148 | if (!lease) { | |
02b0bdc3 SR |
2149 | log_error("packet_to_lease: no memory to record lease.\n"); |
2150 | return NULL; | |
cc26de46 TL |
2151 | } |
2152 | ||
02b0bdc3 | 2153 | memset(lease, 0, sizeof(*lease)); |
cc26de46 TL |
2154 | |
2155 | /* Copy the lease options. */ | |
02b0bdc3 | 2156 | option_state_reference(&lease->options, packet->options, MDL); |
cc26de46 | 2157 | |
02b0bdc3 SR |
2158 | lease->address.len = sizeof(packet->raw->yiaddr); |
2159 | memcpy(lease->address.iabuf, &packet->raw->yiaddr, | |
2160 | lease->address.len); | |
cc26de46 | 2161 | |
02b0bdc3 SR |
2162 | lease->next_srv_addr.len = sizeof(packet->raw->siaddr); |
2163 | memcpy(lease->next_srv_addr.iabuf, &packet->raw->siaddr, | |
2164 | lease->next_srv_addr.len); | |
cca6a648 | 2165 | |
02b0bdc3 | 2166 | memset(&data, 0, sizeof(data)); |
98311e4b | 2167 | |
b5f904a9 TL |
2168 | if (client -> config -> vendor_space_name) { |
2169 | i = DHO_VENDOR_ENCAPSULATED_OPTIONS; | |
2170 | ||
2171 | /* See if there was a vendor encapsulation option. */ | |
2172 | oc = lookup_option (&dhcp_universe, lease -> options, i); | |
b5f904a9 TL |
2173 | if (oc && |
2174 | client -> config -> vendor_space_name && | |
66e9cecf TL |
2175 | evaluate_option_cache (&data, packet, |
2176 | (struct lease *)0, client, | |
b5f904a9 TL |
2177 | packet -> options, lease -> options, |
2178 | &global_scope, oc, MDL)) { | |
2179 | if (data.len) { | |
f7fdb216 DH |
2180 | if (!option_code_hash_lookup(&option, |
2181 | dhcp_universe.code_hash, | |
2182 | &i, 0, MDL)) | |
2183 | log_fatal("Unable to find VENDOR " | |
2184 | "option (%s:%d).", MDL); | |
b5f904a9 | 2185 | parse_encapsulated_suboptions |
f7fdb216 | 2186 | (packet -> options, option, |
b5f904a9 TL |
2187 | data.data, data.len, &dhcp_universe, |
2188 | client -> config -> vendor_space_name | |
2189 | ); | |
f7fdb216 DH |
2190 | |
2191 | option_dereference(&option, MDL); | |
b5f904a9 TL |
2192 | } |
2193 | data_string_forget (&data, MDL); | |
2194 | } | |
2195 | } else | |
2196 | i = 0; | |
2197 | ||
02a015fb | 2198 | /* Figure out the overload flag. */ |
230e73e4 | 2199 | oc = lookup_option (&dhcp_universe, lease -> options, |
02a015fb | 2200 | DHO_DHCP_OPTION_OVERLOAD); |
02a015fb | 2201 | if (oc && |
66e9cecf | 2202 | evaluate_option_cache (&data, packet, (struct lease *)0, client, |
0852a27f | 2203 | packet -> options, lease -> options, |
cf78bf20 | 2204 | &global_scope, oc, MDL)) { |
02a015fb TL |
2205 | if (data.len > 0) |
2206 | i = data.data [0]; | |
2207 | else | |
2208 | i = 0; | |
cf78bf20 | 2209 | data_string_forget (&data, MDL); |
02a015fb TL |
2210 | } else |
2211 | i = 0; | |
2212 | ||
cc26de46 | 2213 | /* If the server name was filled out, copy it. */ |
02a015fb | 2214 | if (!(i & 2) && packet -> raw -> sname [0]) { |
b1b7b521 | 2215 | unsigned len; |
cc26de46 | 2216 | /* Don't count on the NUL terminator. */ |
e2624b82 | 2217 | for (len = 0; len < DHCP_SNAME_LEN; len++) |
cc26de46 TL |
2218 | if (!packet -> raw -> sname [len]) |
2219 | break; | |
cf78bf20 | 2220 | lease -> server_name = dmalloc (len + 1, MDL); |
cc26de46 | 2221 | if (!lease -> server_name) { |
98311e4b | 2222 | log_error ("dhcpoffer: no memory for server name.\n"); |
02a015fb | 2223 | destroy_client_lease (lease); |
cc26de46 TL |
2224 | return (struct client_lease *)0; |
2225 | } else { | |
2226 | memcpy (lease -> server_name, | |
2227 | packet -> raw -> sname, len); | |
2228 | lease -> server_name [len] = 0; | |
2229 | } | |
2230 | } | |
2231 | ||
2232 | /* Ditto for the filename. */ | |
0852a27f | 2233 | if (!(i & 1) && packet -> raw -> file [0]) { |
b1b7b521 | 2234 | unsigned len; |
cc26de46 | 2235 | /* Don't count on the NUL terminator. */ |
e2624b82 | 2236 | for (len = 0; len < DHCP_FILE_LEN; len++) |
cc26de46 TL |
2237 | if (!packet -> raw -> file [len]) |
2238 | break; | |
cf78bf20 | 2239 | lease -> filename = dmalloc (len + 1, MDL); |
cc26de46 | 2240 | if (!lease -> filename) { |
8ae2d595 | 2241 | log_error ("dhcpoffer: no memory for filename.\n"); |
02a015fb | 2242 | destroy_client_lease (lease); |
cc26de46 TL |
2243 | return (struct client_lease *)0; |
2244 | } else { | |
2245 | memcpy (lease -> filename, | |
2246 | packet -> raw -> file, len); | |
2247 | lease -> filename [len] = 0; | |
2248 | } | |
2249 | } | |
89c425dd | 2250 | |
a7341359 SR |
2251 | execute_statements_in_scope(NULL, (struct packet *)packet, NULL, |
2252 | client, lease->options, lease->options, | |
2253 | &global_scope, client->config->on_receipt, | |
2254 | NULL, NULL); | |
89c425dd | 2255 | |
cc26de46 | 2256 | return lease; |
3dbe2246 | 2257 | } |
e581d615 | 2258 | |
c1503c57 TL |
2259 | void dhcpnak (packet) |
2260 | struct packet *packet; | |
2261 | { | |
deff2d59 | 2262 | struct interface_info *ip = packet -> interface; |
02d9e453 TL |
2263 | struct client_state *client; |
2264 | ||
2265 | /* Find a client state that matches the xid... */ | |
2266 | for (client = ip -> client; client; client = client -> next) | |
2267 | if (client -> xid == packet -> raw -> xid) | |
2268 | break; | |
deff2d59 | 2269 | |
deff2d59 TL |
2270 | /* If we're not receptive to an offer right now, or if the offer |
2271 | has an unrecognizable transaction id, then just drop it. */ | |
02d9e453 | 2272 | if (!client || |
31730f17 | 2273 | (packet -> interface -> hw_address.hlen - 1 != |
fcaec4ef | 2274 | packet -> raw -> hlen) || |
31730f17 | 2275 | (memcmp (&packet -> interface -> hw_address.hbuf [1], |
fcaec4ef | 2276 | packet -> raw -> chaddr, packet -> raw -> hlen))) { |
2d1b06e0 | 2277 | #if defined (DEBUG) |
8ae2d595 | 2278 | log_debug ("DHCPNAK in wrong transaction."); |
2d1b06e0 | 2279 | #endif |
deff2d59 TL |
2280 | return; |
2281 | } | |
2282 | ||
02d9e453 TL |
2283 | if (client -> state != S_REBOOTING && |
2284 | client -> state != S_REQUESTING && | |
2285 | client -> state != S_RENEWING && | |
2286 | client -> state != S_REBINDING) { | |
2d1b06e0 | 2287 | #if defined (DEBUG) |
8ae2d595 | 2288 | log_debug ("DHCPNAK in wrong state."); |
2d1b06e0 | 2289 | #endif |
deff2d59 TL |
2290 | return; |
2291 | } | |
2292 | ||
8ae2d595 | 2293 | log_info ("DHCPNAK from %s", piaddr (packet -> client_addr)); |
34fdad6c | 2294 | |
02d9e453 | 2295 | if (!client -> active) { |
2d1b06e0 | 2296 | #if defined (DEBUG) |
8ae2d595 | 2297 | log_info ("DHCPNAK with no active lease.\n"); |
2d1b06e0 | 2298 | #endif |
deff2d59 TL |
2299 | return; |
2300 | } | |
2301 | ||
6cbc6629 DH |
2302 | /* If we get a DHCPNAK, we use the EXPIRE dhclient-script state |
2303 | * to indicate that we want all old bindings to be removed. (It | |
2304 | * is possible that we may get a NAK while in the RENEW state, | |
2305 | * so we might have bindings active at that time) | |
2306 | */ | |
2307 | script_init(client, "EXPIRE", NULL); | |
2308 | script_write_params(client, "old_", client->active); | |
10613724 | 2309 | script_write_requested(client); |
6cbc6629 DH |
2310 | if (client->alias) |
2311 | script_write_params(client, "alias_", client->alias); | |
2312 | script_go(client); | |
2313 | ||
02d9e453 TL |
2314 | destroy_client_lease (client -> active); |
2315 | client -> active = (struct client_lease *)0; | |
deff2d59 TL |
2316 | |
2317 | /* Stop sending DHCPREQUEST packets... */ | |
02d9e453 | 2318 | cancel_timeout (send_request, client); |
deff2d59 | 2319 | |
0a73b7b6 SK |
2320 | /* On some scripts, 'EXPIRE' causes the interface to be ifconfig'd |
2321 | * down (this expunges any routes and arp cache). This makes the | |
2322 | * interface unusable by state_init(), which we call next. So, we | |
2323 | * need to 'PREINIT' the interface to bring it back up. | |
2324 | */ | |
2325 | script_init(client, "PREINIT", NULL); | |
2326 | if (client->alias) | |
2327 | script_write_params(client, "alias_", client->alias); | |
2328 | script_go(client); | |
2329 | ||
02d9e453 TL |
2330 | client -> state = S_INIT; |
2331 | state_init (client); | |
e581d615 TL |
2332 | } |
2333 | ||
cc26de46 | 2334 | /* Send out a DHCPDISCOVER packet, and set a timeout to send out another |
66f973e4 TL |
2335 | one after the right interval has expired. If we don't get an offer by |
2336 | the time we reach the panic interval, call the panic function. */ | |
469cf3a4 | 2337 | |
02d9e453 TL |
2338 | void send_discover (cpp) |
2339 | void *cpp; | |
469cf3a4 | 2340 | { |
02d9e453 | 2341 | struct client_state *client = cpp; |
84c4adde | 2342 | |
cc26de46 TL |
2343 | int result; |
2344 | int interval; | |
9bdb9271 | 2345 | int increase = 1; |
be62cf06 | 2346 | struct timeval tv; |
cc26de46 TL |
2347 | |
2348 | /* Figure out how long it's been since we started transmitting. */ | |
02d9e453 | 2349 | interval = cur_time - client -> first_sending; |
cc26de46 TL |
2350 | |
2351 | /* If we're past the panic timeout, call the script and tell it | |
2352 | we haven't found anything for this interface yet. */ | |
02d9e453 TL |
2353 | if (interval > client -> config -> timeout) { |
2354 | state_panic (client); | |
b00d3884 | 2355 | return; |
cc26de46 | 2356 | } |
469cf3a4 | 2357 | |
9bdb9271 TL |
2358 | /* If we're selecting media, try the whole list before doing |
2359 | the exponential backoff, but if we've already received an | |
2360 | offer, stop looping, because we obviously have it right. */ | |
02d9e453 TL |
2361 | if (!client -> offered_leases && |
2362 | client -> config -> media) { | |
9bdb9271 TL |
2363 | int fail = 0; |
2364 | again: | |
02d9e453 TL |
2365 | if (client -> medium) { |
2366 | client -> medium = client -> medium -> next; | |
9bdb9271 | 2367 | increase = 0; |
3dbe2246 | 2368 | } |
02d9e453 | 2369 | if (!client -> medium) { |
9bdb9271 | 2370 | if (fail) |
8ae2d595 | 2371 | log_fatal ("No valid media types for %s!", |
02d9e453 TL |
2372 | client -> interface -> name); |
2373 | client -> medium = | |
2374 | client -> config -> media; | |
9bdb9271 TL |
2375 | increase = 1; |
2376 | } | |
3dbe2246 | 2377 | |
8ae2d595 | 2378 | log_info ("Trying medium \"%s\" %d", |
b1423aed | 2379 | client -> medium -> string, increase); |
27be804f TM |
2380 | script_init(client, "MEDIUM", client -> medium); |
2381 | if (script_go(client)) { | |
b1423aed | 2382 | fail = 1; |
9bdb9271 TL |
2383 | goto again; |
2384 | } | |
2385 | } | |
cc26de46 | 2386 | |
9bdb9271 TL |
2387 | /* If we're supposed to increase the interval, do so. If it's |
2388 | currently zero (i.e., we haven't sent any packets yet), set | |
98311e4b DH |
2389 | it to initial_interval; otherwise, add to it a random number |
2390 | between zero and two times itself. On average, this means | |
2391 | that it will double with every transmission. */ | |
9bdb9271 | 2392 | if (increase) { |
88cd8aca DH |
2393 | if (!client->interval) |
2394 | client->interval = client->config->initial_interval; | |
b1423aed | 2395 | else |
88cd8aca | 2396 | client->interval += random() % (2 * client->interval); |
cc26de46 | 2397 | |
34fdad6c | 2398 | /* Don't backoff past cutoff. */ |
88cd8aca DH |
2399 | if (client->interval > client->config->backoff_cutoff) |
2400 | client->interval = (client->config->backoff_cutoff / 2) | |
2401 | + (random() % client->config->backoff_cutoff); | |
2402 | } else if (!client->interval) | |
2403 | client->interval = client->config->initial_interval; | |
3dbe2246 | 2404 | |
cc26de46 TL |
2405 | /* If the backoff would take us to the panic timeout, just use that |
2406 | as the interval. */ | |
02d9e453 TL |
2407 | if (cur_time + client -> interval > |
2408 | client -> first_sending + client -> config -> timeout) | |
2409 | client -> interval = | |
2410 | (client -> first_sending + | |
2411 | client -> config -> timeout) - cur_time + 1; | |
cc26de46 | 2412 | |
34fdad6c | 2413 | /* Record the number of seconds since we started sending. */ |
af6df788 TL |
2414 | if (interval < 65536) |
2415 | client -> packet.secs = htons (interval); | |
34fdad6c | 2416 | else |
af6df788 TL |
2417 | client -> packet.secs = htons (65535); |
2418 | client -> secs = client -> packet.secs; | |
34fdad6c | 2419 | |
785c1a51 FD |
2420 | #if defined(DHCPv6) && defined(DHCP4o6) |
2421 | if (dhcpv4_over_dhcpv6) { | |
2422 | log_info ("DHCPDISCOVER interval %ld", | |
2423 | (long)(client -> interval)); | |
2424 | } else | |
2425 | #endif | |
8ae2d595 | 2426 | log_info ("DHCPDISCOVER on %s to %s port %d interval %ld", |
02d9e453 | 2427 | client -> name ? client -> name : client -> interface -> name, |
66f973e4 | 2428 | inet_ntoa (sockaddr_broadcast.sin_addr), |
c4661845 | 2429 | ntohs (sockaddr_broadcast.sin_port), (long)(client -> interval)); |
66f973e4 | 2430 | |
cc26de46 | 2431 | /* Send out a packet. */ |
785c1a51 FD |
2432 | #if defined(DHCPv6) && defined(DHCP4o6) |
2433 | if (dhcpv4_over_dhcpv6) { | |
2434 | result = send_dhcpv4_query(client, 1); | |
2435 | } else | |
2436 | #endif | |
dd9237c3 TM |
2437 | result = send_packet(client->interface, NULL, &client->packet, |
2438 | client->packet_length, inaddr_any, | |
2439 | &sockaddr_broadcast, NULL); | |
2440 | if (result < 0) { | |
785c1a51 FD |
2441 | #if defined(DHCPv6) && defined(DHCP4o6) |
2442 | if (dhcpv4_over_dhcpv6) { | |
2443 | log_error("%s:%d: Failed to send %d byte long packet.", | |
2444 | MDL, client->packet_length); | |
2445 | } else | |
2446 | #endif | |
dd9237c3 TM |
2447 | log_error("%s:%d: Failed to send %d byte long packet over %s " |
2448 | "interface.", MDL, client->packet_length, | |
2449 | client->interface->name); | |
2450 | } | |
469cf3a4 | 2451 | |
5d082abd TM |
2452 | /* |
2453 | * If we used 0 microseconds here, and there were other clients on the | |
2454 | * same network with a synchronized local clock (ntp), and a similar | |
2455 | * zero-microsecond-scheduler behavior, then we could be participating | |
2456 | * in a sub-second DOS ttck. | |
2457 | */ | |
2458 | tv.tv_sec = cur_tv.tv_sec + client->interval; | |
2459 | tv.tv_usec = client->interval > 1 ? random() % 1000000 : cur_tv.tv_usec; | |
2460 | add_timeout(&tv, send_discover, client, 0, 0); | |
469cf3a4 TL |
2461 | } |
2462 | ||
b00d3884 TL |
2463 | /* state_panic gets called if we haven't received any offers in a preset |
2464 | amount of time. When this happens, we try to use existing leases that | |
2465 | haven't yet expired, and failing that, we call the client script and | |
2466 | hope it can do something. */ | |
2467 | ||
02d9e453 TL |
2468 | void state_panic (cpp) |
2469 | void *cpp; | |
b00d3884 | 2470 | { |
02d9e453 TL |
2471 | struct client_state *client = cpp; |
2472 | struct client_lease *loop; | |
b00d3884 | 2473 | struct client_lease *lp; |
be62cf06 | 2474 | struct timeval tv; |
b00d3884 | 2475 | |
02d9e453 TL |
2476 | loop = lp = client -> active; |
2477 | ||
8ae2d595 | 2478 | log_info ("No DHCPOFFERS received."); |
b00d3884 | 2479 | |
deff2d59 TL |
2480 | /* We may not have an active lease, but we may have some |
2481 | predefined leases that we can try. */ | |
02d9e453 | 2482 | if (!client -> active && client -> leases) |
deff2d59 | 2483 | goto activate_next; |
deff2d59 | 2484 | |
b00d3884 | 2485 | /* Run through the list of leases and see if one can be used. */ |
02d9e453 TL |
2486 | while (client -> active) { |
2487 | if (client -> active -> expiry > cur_time) { | |
8ae2d595 | 2488 | log_info ("Trying recorded lease %s", |
02d9e453 | 2489 | piaddr (client -> active -> address)); |
b00d3884 TL |
2490 | /* Run the client script with the existing |
2491 | parameters. */ | |
27be804f | 2492 | script_init(client, "TIMEOUT", |
02d9e453 | 2493 | client -> active -> medium); |
27be804f | 2494 | script_write_params(client, "new_", client -> active); |
10613724 | 2495 | script_write_requested(client); |
02d9e453 | 2496 | if (client -> alias) |
27be804f TM |
2497 | script_write_params(client, "alias_", |
2498 | client -> alias); | |
b00d3884 TL |
2499 | |
2500 | /* If the old lease is still good and doesn't | |
2501 | yet need renewal, go into BOUND state and | |
2502 | timeout at the renewal time. */ | |
27be804f | 2503 | if (!script_go(client)) { |
1c016679 TL |
2504 | if (cur_time < client -> active -> renewal) { |
2505 | client -> state = S_BOUND; | |
2506 | log_info ("bound: renewal in %ld %s.", | |
2507 | (long)(client -> active -> renewal - | |
2508 | cur_time), "seconds"); | |
5d082abd TM |
2509 | tv.tv_sec = client->active->renewal; |
2510 | tv.tv_usec = ((client->active->renewal - | |
2511 | cur_time) > 1) ? | |
2512 | random() % 1000000 : | |
2513 | cur_tv.tv_usec; | |
2514 | add_timeout(&tv, state_bound, client, 0, 0); | |
1c016679 TL |
2515 | } else { |
2516 | client -> state = S_BOUND; | |
2517 | log_info ("bound: immediate renewal."); | |
2518 | state_bound (client); | |
2519 | } | |
2520 | reinitialize_interfaces (); | |
29b23207 | 2521 | detach (); |
1c016679 | 2522 | return; |
b00d3884 TL |
2523 | } |
2524 | } | |
2525 | ||
2526 | /* If there are no other leases, give up. */ | |
02d9e453 TL |
2527 | if (!client -> leases) { |
2528 | client -> leases = client -> active; | |
2529 | client -> active = (struct client_lease *)0; | |
b00d3884 TL |
2530 | break; |
2531 | } | |
2532 | ||
deff2d59 | 2533 | activate_next: |
b00d3884 TL |
2534 | /* Otherwise, put the active lease at the end of the |
2535 | lease list, and try another lease.. */ | |
02d9e453 | 2536 | for (lp = client -> leases; lp -> next; lp = lp -> next) |
b00d3884 | 2537 | ; |
02d9e453 | 2538 | lp -> next = client -> active; |
34fdad6c TL |
2539 | if (lp -> next) { |
2540 | lp -> next -> next = (struct client_lease *)0; | |
2541 | } | |
02d9e453 TL |
2542 | client -> active = client -> leases; |
2543 | client -> leases = client -> leases -> next; | |
b00d3884 TL |
2544 | |
2545 | /* If we already tried this lease, we've exhausted the | |
2546 | set of leases, so we might as well give up for | |
2547 | now. */ | |
02d9e453 | 2548 | if (client -> active == loop) |
b00d3884 | 2549 | break; |
66f973e4 | 2550 | else if (!loop) |
02d9e453 | 2551 | loop = client -> active; |
b00d3884 TL |
2552 | } |
2553 | ||
2554 | /* No leases were available, or what was available didn't work, so | |
2555 | tell the shell script that we failed to allocate an address, | |
2556 | and try again later. */ | |
c08637bb | 2557 | if (onetry) { |
5c03ed37 | 2558 | if (!quiet) { |
c08637bb TL |
2559 | log_info ("Unable to obtain a lease on first try.%s", |
2560 | " Exiting."); | |
5c03ed37 | 2561 | } |
c788d4f8 | 2562 | |
5c03ed37 | 2563 | #if defined (CALL_SCRIPT_ON_ONETRY_FAIL) |
c788d4f8 TM |
2564 | /* Let's call a script and we're done */ |
2565 | script_init(client, "FAIL", (struct string_list *)0); | |
2566 | script_go(client); | |
5c03ed37 | 2567 | #endif |
29b23207 | 2568 | finish(2); |
c08637bb TL |
2569 | } |
2570 | ||
11373fb6 | 2571 | log_info ("No working leases in persistent database - sleeping."); |
27be804f | 2572 | script_init(client, "FAIL", (struct string_list *)0); |
02d9e453 | 2573 | if (client -> alias) |
27be804f TM |
2574 | script_write_params(client, "alias_", client -> alias); |
2575 | script_go(client); | |
02d9e453 | 2576 | client -> state = S_INIT; |
5d082abd TM |
2577 | tv.tv_sec = cur_tv.tv_sec + ((client->config->retry_interval + 1) / 2 + |
2578 | (random() % client->config->retry_interval)); | |
2579 | tv.tv_usec = ((tv.tv_sec - cur_tv.tv_sec) > 1) ? | |
2580 | random() % 1000000 : cur_tv.tv_usec; | |
2581 | add_timeout(&tv, state_init, client, 0, 0); | |
29b23207 | 2582 | detach (); |
b00d3884 TL |
2583 | } |
2584 | ||
02d9e453 TL |
2585 | void send_request (cpp) |
2586 | void *cpp; | |
e581d615 | 2587 | { |
02d9e453 | 2588 | struct client_state *client = cpp; |
84c4adde | 2589 | |
c1503c57 | 2590 | int result; |
cc26de46 TL |
2591 | int interval; |
2592 | struct sockaddr_in destination; | |
2593 | struct in_addr from; | |
be62cf06 | 2594 | struct timeval tv; |
35e86889 TM |
2595 | char rip_buf[128]; |
2596 | const char* rip_str = ""; | |
cc26de46 TL |
2597 | |
2598 | /* Figure out how long it's been since we started transmitting. */ | |
02d9e453 | 2599 | interval = cur_time - client -> first_sending; |
cc26de46 | 2600 | |
34fdad6c TL |
2601 | /* If we're in the INIT-REBOOT or REQUESTING state and we're |
2602 | past the reboot timeout, go to INIT and see if we can | |
2603 | DISCOVER an address... */ | |
2604 | /* XXX In the INIT-REBOOT state, if we don't get an ACK, it | |
2605 | means either that we're on a network with no DHCP server, | |
2606 | or that our server is down. In the latter case, assuming | |
2607 | that there is a backup DHCP server, DHCPDISCOVER will get | |
2608 | us a new address, but we could also have successfully | |
2609 | reused our old address. In the former case, we're hosed | |
2610 | anyway. This is not a win-prone situation. */ | |
02d9e453 TL |
2611 | if ((client -> state == S_REBOOTING || |
2612 | client -> state == S_REQUESTING) && | |
2613 | interval > client -> config -> reboot_timeout) { | |
b8cf055d | 2614 | cancel: |
02d9e453 TL |
2615 | client -> state = S_INIT; |
2616 | cancel_timeout (send_request, client); | |
2617 | state_init (client); | |
deff2d59 TL |
2618 | return; |
2619 | } | |
2620 | ||
b8cf055d TL |
2621 | /* If we're in the reboot state, make sure the media is set up |
2622 | correctly. */ | |
02d9e453 TL |
2623 | if (client -> state == S_REBOOTING && |
2624 | !client -> medium && | |
2625 | client -> active -> medium ) { | |
27be804f | 2626 | script_init(client, "MEDIUM", client -> active -> medium); |
b8cf055d TL |
2627 | |
2628 | /* If the medium we chose won't fly, go to INIT state. */ | |
27be804f | 2629 | if (script_go(client)) |
b8cf055d TL |
2630 | goto cancel; |
2631 | ||
2632 | /* Record the medium. */ | |
02d9e453 | 2633 | client -> medium = client -> active -> medium; |
b8cf055d TL |
2634 | } |
2635 | ||
cc26de46 TL |
2636 | /* If the lease has expired, relinquish the address and go back |
2637 | to the INIT state. */ | |
02d9e453 TL |
2638 | if (client -> state != S_REQUESTING && |
2639 | cur_time > client -> active -> expiry) { | |
cc26de46 | 2640 | /* Run the client script with the new parameters. */ |
27be804f TM |
2641 | script_init(client, "EXPIRE", (struct string_list *)0); |
2642 | script_write_params(client, "old_", client -> active); | |
10613724 | 2643 | script_write_requested(client); |
02d9e453 | 2644 | if (client -> alias) |
27be804f TM |
2645 | script_write_params(client, "alias_", |
2646 | client -> alias); | |
2647 | script_go(client); | |
02d9e453 | 2648 | |
62d0cb47 TL |
2649 | /* Now do a preinit on the interface so that we can |
2650 | discover a new address. */ | |
27be804f | 2651 | script_init(client, "PREINIT", (struct string_list *)0); |
62d0cb47 | 2652 | if (client -> alias) |
27be804f TM |
2653 | script_write_params(client, "alias_", |
2654 | client -> alias); | |
2655 | script_go(client); | |
62d0cb47 | 2656 | |
02d9e453 TL |
2657 | client -> state = S_INIT; |
2658 | state_init (client); | |
cc26de46 TL |
2659 | return; |
2660 | } | |
2661 | ||
2662 | /* Do the exponential backoff... */ | |
02d9e453 TL |
2663 | if (!client -> interval) |
2664 | client -> interval = client -> config -> initial_interval; | |
34fdad6c | 2665 | else { |
02d9e453 TL |
2666 | client -> interval += ((random () >> 2) % |
2667 | (2 * client -> interval)); | |
34fdad6c | 2668 | } |
3dbe2246 | 2669 | |
34fdad6c | 2670 | /* Don't backoff past cutoff. */ |
02d9e453 TL |
2671 | if (client -> interval > |
2672 | client -> config -> backoff_cutoff) | |
2673 | client -> interval = | |
2674 | ((client -> config -> backoff_cutoff / 2) | |
98311e4b DH |
2675 | + ((random () >> 2) % |
2676 | client -> config -> backoff_cutoff)); | |
cc26de46 TL |
2677 | |
2678 | /* If the backoff would take us to the expiry time, just set the | |
2679 | timeout to the expiry time. */ | |
02d9e453 TL |
2680 | if (client -> state != S_REQUESTING && |
2681 | cur_time + client -> interval > client -> active -> expiry) | |
2682 | client -> interval = | |
2683 | client -> active -> expiry - cur_time + 1; | |
cc26de46 TL |
2684 | |
2685 | /* If the lease T2 time has elapsed, or if we're not yet bound, | |
2686 | broadcast the DHCPREQUEST rather than unicasting. */ | |
02d9e453 | 2687 | if (client -> state == S_REQUESTING || |
62d0cb47 | 2688 | client -> state == S_REBOOTING || |
02d9e453 | 2689 | cur_time > client -> active -> rebind) |
3020a2c1 | 2690 | destination.sin_addr = sockaddr_broadcast.sin_addr; |
cc26de46 TL |
2691 | else |
2692 | memcpy (&destination.sin_addr.s_addr, | |
02d9e453 | 2693 | client -> destination.iabuf, |
cc26de46 TL |
2694 | sizeof destination.sin_addr.s_addr); |
2695 | destination.sin_port = remote_port; | |
b00d3884 TL |
2696 | destination.sin_family = AF_INET; |
2697 | #ifdef HAVE_SA_LEN | |
2698 | destination.sin_len = sizeof destination; | |
2699 | #endif | |
cc26de46 | 2700 | |
7d3bc735 TL |
2701 | if (client -> state == S_RENEWING || |
2702 | client -> state == S_REBINDING) | |
02d9e453 | 2703 | memcpy (&from, client -> active -> address.iabuf, |
cc26de46 TL |
2704 | sizeof from); |
2705 | else | |
2706 | from.s_addr = INADDR_ANY; | |
2707 | ||
34fdad6c | 2708 | /* Record the number of seconds since we started sending. */ |
af6df788 TL |
2709 | if (client -> state == S_REQUESTING) |
2710 | client -> packet.secs = client -> secs; | |
2711 | else { | |
2712 | if (interval < 65536) | |
2713 | client -> packet.secs = htons (interval); | |
2714 | else | |
2715 | client -> packet.secs = htons (65535); | |
2716 | } | |
34fdad6c | 2717 | |
785c1a51 FD |
2718 | #if defined(DHCPv6) && defined(DHCP4o6) |
2719 | if (dhcpv4_over_dhcpv6) { | |
2720 | log_info ("DHCPREQUEST"); | |
2721 | } else | |
2722 | #endif | |
35e86889 TM |
2723 | memset(rip_buf, 0x0, sizeof(rip_buf)); |
2724 | if (client->state == S_BOUND || client->state == S_RENEWING || | |
2725 | client->state == S_REBINDING) { | |
2726 | rip_str = inet_ntoa(client->packet.ciaddr); | |
2727 | } else { | |
2728 | rip_str = piaddr(client->requested_address); | |
2729 | } | |
2730 | ||
2731 | strncpy(rip_buf, rip_str, sizeof(rip_buf)-1); | |
2732 | log_info ("DHCPREQUEST for %s on %s to %s port %d", rip_buf, | |
2733 | client->name ? client->name : client->interface->name, | |
2734 | inet_ntoa(destination.sin_addr), | |
2735 | ntohs (destination.sin_port)); | |
cc26de46 | 2736 | |
785c1a51 FD |
2737 | #if defined(DHCPv6) && defined(DHCP4o6) |
2738 | if (dhcpv4_over_dhcpv6) { | |
2739 | int broadcast = 0; | |
2740 | if (destination.sin_addr.s_addr == INADDR_BROADCAST) | |
2741 | broadcast = 1; | |
2742 | result = send_dhcpv4_query(client, broadcast); | |
2743 | if (result < 0) { | |
2744 | log_error("%s:%d: Failed to send %d byte long packet.", | |
2745 | MDL, client->packet_length); | |
2746 | } | |
2747 | } else | |
2748 | #endif | |
62d0cb47 | 2749 | if (destination.sin_addr.s_addr != INADDR_BROADCAST && |
dd9237c3 TM |
2750 | fallback_interface) { |
2751 | result = send_packet(fallback_interface, NULL, &client->packet, | |
2752 | client->packet_length, from, &destination, | |
2753 | NULL); | |
2754 | if (result < 0) { | |
2755 | log_error("%s:%d: Failed to send %d byte long packet " | |
2756 | "over %s interface.", MDL, | |
2757 | client->packet_length, | |
2758 | fallback_interface->name); | |
2759 | } | |
2760 | } | |
2761 | else { | |
cc26de46 | 2762 | /* Send out a packet. */ |
dd9237c3 TM |
2763 | result = send_packet(client->interface, NULL, &client->packet, |
2764 | client->packet_length, from, &destination, | |
2765 | NULL); | |
2766 | if (result < 0) { | |
2767 | log_error("%s:%d: Failed to send %d byte long packet" | |
2768 | " over %s interface.", MDL, | |
2769 | client->packet_length, | |
2770 | client->interface->name); | |
2771 | } | |
2772 | } | |
469cf3a4 | 2773 | |
5d082abd TM |
2774 | tv.tv_sec = cur_tv.tv_sec + client->interval; |
2775 | tv.tv_usec = ((tv.tv_sec - cur_tv.tv_sec) > 1) ? | |
2776 | random() % 1000000 : cur_tv.tv_usec; | |
2777 | add_timeout(&tv, send_request, client, 0, 0); | |
469cf3a4 TL |
2778 | } |
2779 | ||
02d9e453 TL |
2780 | void send_decline (cpp) |
2781 | void *cpp; | |
b00d3884 | 2782 | { |
02d9e453 | 2783 | struct client_state *client = cpp; |
84c4adde | 2784 | |
b00d3884 TL |
2785 | int result; |
2786 | ||
785c1a51 FD |
2787 | #if defined(DHCPv6) && defined(DHCP4o6) |
2788 | if (dhcpv4_over_dhcpv6) { | |
2789 | log_info ("DHCPDECLINE"); | |
2790 | } else | |
2791 | #endif | |
35e86889 TM |
2792 | log_info ("DHCPDECLINE of %s on %s to %s port %d", |
2793 | piaddr(client->requested_address), | |
2794 | (client->name ? client->name : client->interface->name), | |
2795 | inet_ntoa(sockaddr_broadcast.sin_addr), | |
2796 | ntohs(sockaddr_broadcast.sin_port)); | |
b00d3884 TL |
2797 | |
2798 | /* Send out a packet. */ | |
785c1a51 FD |
2799 | #if defined(DHCPv6) && defined(DHCP4o6) |
2800 | if (dhcpv4_over_dhcpv6) { | |
2801 | result = send_dhcpv4_query(client, 1); | |
2802 | } else | |
2803 | #endif | |
dd9237c3 TM |
2804 | result = send_packet(client->interface, NULL, &client->packet, |
2805 | client->packet_length, inaddr_any, | |
2806 | &sockaddr_broadcast, NULL); | |
2807 | if (result < 0) { | |
785c1a51 FD |
2808 | #if defined(DHCPv6) && defined(DHCP4o6) |
2809 | if (dhcpv4_over_dhcpv6) { | |
2810 | log_error("%s:%d: Failed to send %d byte long packet.", | |
2811 | MDL, client->packet_length); | |
2812 | } else | |
2813 | #endif | |
dd9237c3 TM |
2814 | log_error("%s:%d: Failed to send %d byte long packet over %s" |
2815 | " interface.", MDL, client->packet_length, | |
2816 | client->interface->name); | |
2817 | } | |
b00d3884 TL |
2818 | } |
2819 | ||
02d9e453 TL |
2820 | void send_release (cpp) |
2821 | void *cpp; | |
b00d3884 | 2822 | { |
02d9e453 | 2823 | struct client_state *client = cpp; |
84c4adde | 2824 | |
b00d3884 | 2825 | int result; |
007e3ee4 TL |
2826 | struct sockaddr_in destination; |
2827 | struct in_addr from; | |
2828 | ||
2829 | memcpy (&from, client -> active -> address.iabuf, | |
2830 | sizeof from); | |
2831 | memcpy (&destination.sin_addr.s_addr, | |
2832 | client -> destination.iabuf, | |
2833 | sizeof destination.sin_addr.s_addr); | |
2834 | destination.sin_port = remote_port; | |
2835 | destination.sin_family = AF_INET; | |
2836 | #ifdef HAVE_SA_LEN | |
2837 | destination.sin_len = sizeof destination; | |
2838 | #endif | |
2839 | ||
007e3ee4 TL |
2840 | /* Set the lease to end now, so that we don't accidentally |
2841 | reuse it if we restart before the old expiry time. */ | |
2842 | client -> active -> expiry = | |
2843 | client -> active -> renewal = | |
2844 | client -> active -> rebind = cur_time; | |
2845 | if (!write_client_lease (client, client -> active, 1, 1)) { | |
2846 | log_error ("Can't release lease: lease write failed."); | |
2847 | return; | |
2848 | } | |
b00d3884 | 2849 | |
785c1a51 FD |
2850 | #if defined(DHCPv6) && defined(DHCP4o6) |
2851 | if (dhcpv4_over_dhcpv6) { | |
2852 | log_info ("DHCPRELEASE"); | |
2853 | } else | |
2854 | #endif | |
35e86889 TM |
2855 | log_info ("DHCPRELEASE of %s on %s to %s port %d", |
2856 | piaddr(client->active->address), | |
2857 | client->name ? client->name : client->interface->name, | |
2858 | inet_ntoa (destination.sin_addr), | |
2859 | ntohs (destination.sin_port)); | |
b00d3884 | 2860 | |
785c1a51 FD |
2861 | #if defined(DHCPv6) && defined(DHCP4o6) |
2862 | if (dhcpv4_over_dhcpv6) { | |
2863 | int broadcast = 0; | |
2864 | if (destination.sin_addr.s_addr == INADDR_BROADCAST) | |
2865 | broadcast = 1; | |
2866 | result = send_dhcpv4_query(client, broadcast); | |
2867 | if (result < 0) { | |
2868 | log_error("%s:%d: Failed to send %d byte long packet.", | |
2869 | MDL, client->packet_length); | |
2870 | } | |
2871 | } else | |
2872 | #endif | |
dd9237c3 TM |
2873 | if (fallback_interface) { |
2874 | result = send_packet(fallback_interface, NULL, &client->packet, | |
2875 | client->packet_length, from, &destination, | |
2876 | NULL); | |
2877 | if (result < 0) { | |
2878 | log_error("%s:%d: Failed to send %d byte long packet" | |
2879 | " over %s interface.", MDL, | |
2880 | client->packet_length, | |
2881 | fallback_interface->name); | |
2882 | } | |
2883 | } else { | |
007e3ee4 | 2884 | /* Send out a packet. */ |
dd9237c3 TM |
2885 | result = send_packet(client->interface, NULL, &client->packet, |
2886 | client->packet_length, from, &destination, | |
2887 | NULL); | |
2888 | if (result < 0) { | |
2889 | log_error ("%s:%d: Failed to send %d byte long packet" | |
2890 | " over %s interface.", MDL, | |
2891 | client->packet_length, | |
2892 | client->interface->name); | |
2893 | } | |
2894 | ||
2895 | } | |
b00d3884 TL |
2896 | } |
2897 | ||
785c1a51 FD |
2898 | #if defined(DHCPv6) && defined(DHCP4o6) |
2899 | /* | |
2900 | * \brief Send a DHCPv4-query to the DHCPv6 client | |
2901 | * (DHCPv4 client function) | |
2902 | * | |
2903 | * The DHCPv4 client sends a DHCPv4-query to the DHCPv6 client over | |
2904 | * the inter-process communication socket. | |
2905 | * | |
2906 | * \param client the DHCPv4 client state | |
2907 | * \param broadcast the broadcast flag | |
2908 | * \return the sent byte count (-1 on error) | |
2909 | */ | |
2910 | static int send_dhcpv4_query(struct client_state *client, int broadcast) { | |
2911 | struct data_string ds; | |
2912 | struct dhcpv4_over_dhcpv6_packet *query; | |
2913 | int ofs, len, cc; | |
2914 | ||
2915 | if (dhcp4o6_state <= 0) { | |
2916 | log_info("send_dhcpv4_query: not ready."); | |
2917 | return -1; | |
2918 | } | |
2919 | ||
2920 | /* | |
2921 | * Compute buffer length and allocate it. | |
2922 | */ | |
2923 | len = ofs = (int)(offsetof(struct dhcpv4_over_dhcpv6_packet, options)); | |
2924 | len += dhcpv6_universe.tag_size + dhcpv6_universe.length_size; | |
2925 | len += client->packet_length; | |
2926 | memset(&ds, 0, sizeof(ds)); | |
2927 | if (!buffer_allocate(&ds.buffer, len, MDL)) { | |
2928 | log_error("Unable to allocate memory for DHCPv4-query."); | |
2929 | return -1; | |
2930 | } | |
2931 | ds.data = ds.buffer->data; | |
2932 | ds.len = len; | |
2933 | ||
2934 | /* | |
2935 | * Fill header. | |
2936 | */ | |
2937 | query = (struct dhcpv4_over_dhcpv6_packet *)ds.data; | |
2938 | query->msg_type = DHCPV6_DHCPV4_QUERY; | |
2939 | query->flags[0] = query->flags[1] = query->flags[2] = 0; | |
2940 | if (!broadcast) | |
2941 | query->flags[0] |= DHCP4O6_QUERY_UNICAST; | |
2942 | ||
2943 | /* | |
2944 | * Append DHCPv4 message. | |
2945 | */ | |
2946 | dhcpv6_universe.store_tag(ds.buffer->data + ofs, D6O_DHCPV4_MSG); | |
2947 | ofs += dhcpv6_universe.tag_size; | |
2948 | dhcpv6_universe.store_length(ds.buffer->data + ofs, | |
2949 | client->packet_length); | |
2950 | ofs += dhcpv6_universe.length_size; | |
2951 | memcpy(ds.buffer->data + ofs, &client->packet, client->packet_length); | |
2952 | ||
2953 | /* | |
2954 | * Send DHCPv6 message. | |
2955 | */ | |
2956 | cc = send(dhcp4o6_fd, ds.data, ds.len, 0); | |
2957 | if (cc < 0) | |
2958 | log_error("send_dhcpv4_query: send(): %m"); | |
2959 | ||
2960 | data_string_forget(&ds, MDL); | |
2961 | ||
2962 | return cc; | |
2963 | } | |
2964 | ||
2965 | /* | |
2966 | * \brief Forward a DHCPv4-query to all DHCPv4 over DHCPv6 server addresses. | |
2967 | * (DHCPv6 client function) | |
2968 | * | |
2969 | * \param raw the DHCPv6 DHCPv4-query message raw content | |
2970 | */ | |
2971 | static void forw_dhcpv4_query(struct data_string *raw) { | |
2972 | struct interface_info *ip; | |
2973 | struct client_state *client; | |
2974 | struct dhc6_lease *lease; | |
2975 | struct option_cache *oc; | |
2976 | struct data_string addrs; | |
2977 | struct sockaddr_in6 sin6; | |
2978 | int i, send_ret, attempt, success; | |
2979 | ||
2980 | attempt = success = 0; | |
2981 | memset(&sin6, 0, sizeof(sin6)); | |
2982 | sin6.sin6_family = AF_INET6; | |
2983 | sin6.sin6_port = remote_port; | |
2984 | #ifdef HAVE_SA_LEN | |
2985 | sin6.sin6_len = sizeof(sin6); | |
2986 | #endif | |
2987 | memset(&addrs, 0, sizeof(addrs)); | |
2988 | for (ip = interfaces; ip != NULL; ip = ip->next) { | |
2989 | for (client = ip->client; client != NULL; | |
2990 | client = client->next) { | |
2991 | if ((client->state != S_BOUND) && | |
2992 | (client->state != S_RENEWING) && | |
2993 | (client->state != S_REBINDING)) | |
2994 | continue; | |
2995 | lease = client->active_lease; | |
2996 | if ((lease == NULL) || lease->released) | |
2997 | continue; | |
2998 | oc = lookup_option(&dhcpv6_universe, | |
2999 | lease->options, | |
3000 | D6O_DHCP4_O_DHCP6_SERVER); | |
3001 | if ((oc == NULL) || | |
3002 | !evaluate_option_cache(&addrs, NULL, NULL, NULL, | |
3003 | lease->options, NULL, | |
3004 | &global_scope, oc, MDL) || | |
3005 | ((addrs.len % sizeof(sin6.sin6_addr)) != 0)) { | |
3006 | data_string_forget(&addrs, MDL); | |
3007 | continue; | |
3008 | } | |
3009 | if (addrs.len == 0) { | |
3010 | /* note there is nothing to forget */ | |
3011 | inet_pton(AF_INET6, | |
3012 | All_DHCP_Relay_Agents_and_Servers, | |
3013 | &sin6.sin6_addr); | |
3014 | attempt++; | |
3015 | send_ret = send_packet6(ip, raw->data, | |
3016 | raw->len, &sin6); | |
3017 | if (send_ret == raw->len) | |
3018 | success++; | |
3019 | continue; | |
3020 | } | |
3021 | for (i = 0; i < addrs.len; | |
3022 | i += sizeof(sin6.sin6_addr)) { | |
3023 | memcpy(&sin6.sin6_addr, addrs.data + i, | |
3024 | sizeof(sin6.sin6_addr)); | |
3025 | attempt++; | |
3026 | send_ret = send_packet6(ip, raw->data, | |
3027 | raw->len, &sin6); | |
3028 | if (send_ret == raw->len) | |
3029 | success++; | |
3030 | } | |
3031 | data_string_forget(&addrs, MDL); | |
3032 | } | |
3033 | } | |
3034 | ||
3035 | log_info("forw_dhcpv4_query: sent(%d): %d/%d", | |
3036 | raw->len, success, attempt); | |
3037 | ||
3038 | if (attempt == 0) | |
3039 | dhcp4o6_stop(); | |
3040 | } | |
3041 | #endif | |
3042 | ||
0c20eab3 DH |
3043 | void |
3044 | make_client_options(struct client_state *client, struct client_lease *lease, | |
3045 | u_int8_t *type, struct option_cache *sid, | |
3046 | struct iaddr *rip, struct option **prl, | |
3047 | struct option_state **op) | |
469cf3a4 | 3048 | { |
b1b7b521 | 3049 | unsigned i; |
02a015fb | 3050 | struct option_cache *oc; |
f7fdb216 | 3051 | struct option *option = NULL; |
d7d9c0c7 | 3052 | struct buffer *bp = NULL; |
02a015fb | 3053 | |
d758ad8c TL |
3054 | /* If there are any leftover options, get rid of them. */ |
3055 | if (*op) | |
d7d9c0c7 | 3056 | option_state_dereference(op, MDL); |
d758ad8c | 3057 | |
230e73e4 | 3058 | /* Allocate space for options. */ |
d7d9c0c7 | 3059 | option_state_allocate(op, MDL); |
02a015fb TL |
3060 | |
3061 | /* Send the server identifier if provided. */ | |
3062 | if (sid) | |
d7d9c0c7 | 3063 | save_option(&dhcp_universe, *op, sid); |
02a015fb | 3064 | |
d7d9c0c7 | 3065 | oc = NULL; |
2455808f | 3066 | |
02a015fb TL |
3067 | /* Send the requested address if provided. */ |
3068 | if (rip) { | |
d7d9c0c7 | 3069 | client->requested_address = *rip; |
f7fdb216 DH |
3070 | i = DHO_DHCP_REQUESTED_ADDRESS; |
3071 | if (!(option_code_hash_lookup(&option, dhcp_universe.code_hash, | |
3072 | &i, 0, MDL) && | |
3073 | make_const_option_cache(&oc, NULL, rip->iabuf, rip->len, | |
3074 | option, MDL))) | |
230e73e4 | 3075 | log_error ("can't make requested address cache."); |
02a015fb | 3076 | else { |
d7d9c0c7 SR |
3077 | save_option(&dhcp_universe, *op, oc); |
3078 | option_cache_dereference(&oc, MDL); | |
02a015fb | 3079 | } |
f7fdb216 | 3080 | option_dereference(&option, MDL); |
b00d3884 | 3081 | } else { |
d7d9c0c7 | 3082 | client->requested_address.len = 0; |
cc26de46 | 3083 | } |
c1503c57 | 3084 | |
f7fdb216 DH |
3085 | i = DHO_DHCP_MESSAGE_TYPE; |
3086 | if (!(option_code_hash_lookup(&option, dhcp_universe.code_hash, &i, 0, | |
3087 | MDL) && | |
3088 | make_const_option_cache(&oc, NULL, type, 1, option, MDL))) | |
d7d9c0c7 | 3089 | log_error("can't make message type."); |
02a015fb | 3090 | else { |
d7d9c0c7 SR |
3091 | save_option(&dhcp_universe, *op, oc); |
3092 | option_cache_dereference(&oc, MDL); | |
02a015fb | 3093 | } |
f7fdb216 | 3094 | option_dereference(&option, MDL); |
02a015fb TL |
3095 | |
3096 | if (prl) { | |
0c20eab3 DH |
3097 | int len; |
3098 | ||
3099 | /* Probe the length of the list. */ | |
3100 | len = 0; | |
3101 | for (i = 0 ; prl[i] != NULL ; i++) | |
3102 | if (prl[i]->universe == &dhcp_universe) | |
3103 | len++; | |
3104 | ||
d7d9c0c7 SR |
3105 | if (!buffer_allocate(&bp, len, MDL)) |
3106 | log_error("can't make parameter list buffer."); | |
02a015fb | 3107 | else { |
d6614ea2 DH |
3108 | unsigned code = DHO_DHCP_PARAMETER_REQUEST_LIST; |
3109 | ||
0c20eab3 DH |
3110 | len = 0; |
3111 | for (i = 0 ; prl[i] != NULL ; i++) | |
3112 | if (prl[i]->universe == &dhcp_universe) | |
3113 | bp->data[len++] = prl[i]->code; | |
3114 | ||
f7fdb216 DH |
3115 | if (!(option_code_hash_lookup(&option, |
3116 | dhcp_universe.code_hash, | |
d6614ea2 | 3117 | &code, 0, MDL) && |
0c20eab3 | 3118 | make_const_option_cache(&oc, &bp, NULL, len, |
b05e05b7 SR |
3119 | option, MDL))) { |
3120 | if (bp != NULL) | |
3121 | buffer_dereference(&bp, MDL); | |
3122 | log_error ("can't make option cache"); | |
3123 | } else { | |
d7d9c0c7 SR |
3124 | save_option(&dhcp_universe, *op, oc); |
3125 | option_cache_dereference(&oc, MDL); | |
02a015fb | 3126 | } |
f7fdb216 | 3127 | option_dereference(&option, MDL); |
deff2d59 TL |
3128 | } |
3129 | } | |
3130 | ||
d7d9c0c7 SR |
3131 | /* |
3132 | * If requested (duid_v4 == 1) add an RFC4361 compliant client-identifier | |
3133 | * This can be overridden by including a client id in the configuration | |
3134 | * file. | |
3135 | */ | |
3136 | if (duid_v4 == 1) { | |
3137 | struct data_string client_identifier; | |
3138 | int hw_idx, hw_len; | |
3139 | ||
3140 | memset(&client_identifier, 0, sizeof(client_identifier)); | |
3141 | client_identifier.len = 1 + 4 + default_duid.len; | |
3142 | if (!buffer_allocate(&client_identifier.buffer, | |
3143 | client_identifier.len, MDL)) | |
3144 | log_fatal("no memory for default DUID!"); | |
3145 | client_identifier.data = client_identifier.buffer->data; | |
3146 | ||
3147 | i = DHO_DHCP_CLIENT_IDENTIFIER; | |
3148 | ||
3149 | /* Client-identifier type : 1 byte */ | |
3150 | *client_identifier.buffer->data = 255; | |
cca6a648 | 3151 | |
d7d9c0c7 SR |
3152 | /* IAID : 4 bytes |
3153 | * we use the low 4 bytes from the interface address | |
3154 | */ | |
3155 | if (client->interface->hw_address.hlen > 4) { | |
3156 | hw_idx = client->interface->hw_address.hlen - 4; | |
3157 | hw_len = 4; | |
3158 | } else { | |
3159 | hw_idx = 0; | |
3160 | hw_len = client->interface->hw_address.hlen; | |
3161 | } | |
3162 | memcpy(&client_identifier.buffer->data + 5 - hw_len, | |
3163 | client->interface->hw_address.hbuf + hw_idx, | |
3164 | hw_len); | |
cca6a648 | 3165 | |
d7d9c0c7 SR |
3166 | /* Add the default duid */ |
3167 | memcpy(&client_identifier.buffer->data+(1+4), | |
3168 | default_duid.data, default_duid.len); | |
3169 | ||
3170 | /* And save the option */ | |
3171 | if (!(option_code_hash_lookup(&option, dhcp_universe.code_hash, | |
3172 | &i, 0, MDL) && | |
3173 | make_const_option_cache(&oc, NULL, | |
3174 | (u_int8_t *)client_identifier.data, | |
3175 | client_identifier.len, | |
3176 | option, MDL))) | |
3177 | log_error ("can't make requested client id cache.."); | |
3178 | else { | |
3179 | save_option (&dhcp_universe, *op, oc); | |
3180 | option_cache_dereference (&oc, MDL); | |
3181 | } | |
3182 | option_dereference(&option, MDL); | |
3183 | } | |
3184 | ||
02a015fb | 3185 | /* Run statements that need to be run on transmission. */ |
a7341359 SR |
3186 | if (client->config->on_transmission) |
3187 | execute_statements_in_scope(NULL, NULL, NULL, client, | |
3188 | (lease ? lease->options : NULL), | |
3189 | *op, &global_scope, | |
3190 | client->config->on_transmission, | |
3191 | NULL, NULL); | |
02a015fb TL |
3192 | } |
3193 | ||
02d9e453 TL |
3194 | void make_discover (client, lease) |
3195 | struct client_state *client; | |
02a015fb TL |
3196 | struct client_lease *lease; |
3197 | { | |
02a015fb | 3198 | unsigned char discover = DHCPDISCOVER; |
230e73e4 | 3199 | struct option_state *options = (struct option_state *)0; |
02a015fb | 3200 | |
02d9e453 | 3201 | memset (&client -> packet, 0, sizeof (client -> packet)); |
02a015fb | 3202 | |
02d9e453 TL |
3203 | make_client_options (client, |
3204 | lease, &discover, (struct option_cache *)0, | |
02a015fb | 3205 | lease ? &lease -> address : (struct iaddr *)0, |
02d9e453 | 3206 | client -> config -> requested_options, |
02a015fb TL |
3207 | &options); |
3208 | ||
c1503c57 | 3209 | /* Set up the option buffer... */ |
02d9e453 | 3210 | client -> packet_length = |
da38df14 | 3211 | cons_options ((struct packet *)0, &client -> packet, |
98311e4b DH |
3212 | (struct lease *)0, client, |
3213 | /* maximum packet size */1500, | |
3214 | (struct option_state *)0, | |
3215 | options, | |
3216 | /* scope */ &global_scope, | |
3217 | /* overload */ 0, | |
3218 | /* terminate */0, | |
3219 | /* bootpp */0, | |
3220 | (struct data_string *)0, | |
ce75142f | 3221 | client -> config -> vendor_space_name); |
98311e4b DH |
3222 | |
3223 | option_state_dereference (&options, MDL); | |
02d9e453 TL |
3224 | if (client -> packet_length < BOOTP_MIN_LEN) |
3225 | client -> packet_length = BOOTP_MIN_LEN; | |
3226 | ||
3227 | client -> packet.op = BOOTREQUEST; | |
31730f17 | 3228 | client -> packet.htype = client -> interface -> hw_address.hbuf [0]; |
785c1a51 | 3229 | /* Assumes hw_address is known, otherwise a random value may result */ |
31730f17 | 3230 | client -> packet.hlen = client -> interface -> hw_address.hlen - 1; |
02d9e453 TL |
3231 | client -> packet.hops = 0; |
3232 | client -> packet.xid = random (); | |
3233 | client -> packet.secs = 0; /* filled in by send_discover. */ | |
f345b36d TL |
3234 | |
3235 | if (can_receive_unicast_unconfigured (client -> interface)) | |
3236 | client -> packet.flags = 0; | |
3237 | else | |
3238 | client -> packet.flags = htons (BOOTP_BROADCAST); | |
3239 | ||
02d9e453 TL |
3240 | memset (&(client -> packet.ciaddr), |
3241 | 0, sizeof client -> packet.ciaddr); | |
3242 | memset (&(client -> packet.yiaddr), | |
3243 | 0, sizeof client -> packet.yiaddr); | |
3244 | memset (&(client -> packet.siaddr), | |
3245 | 0, sizeof client -> packet.siaddr); | |
11373fb6 | 3246 | client -> packet.giaddr = giaddr; |
31730f17 TL |
3247 | if (client -> interface -> hw_address.hlen > 0) |
3248 | memcpy (client -> packet.chaddr, | |
3249 | &client -> interface -> hw_address.hbuf [1], | |
3250 | (unsigned)(client -> interface -> hw_address.hlen - 1)); | |
c1503c57 TL |
3251 | |
3252 | #ifdef DEBUG_PACKET | |
01aeb18a | 3253 | dump_raw ((unsigned char *)&client -> packet, client -> packet_length); |
c1503c57 | 3254 | #endif |
c1503c57 TL |
3255 | } |
3256 | ||
469cf3a4 | 3257 | |
02d9e453 TL |
3258 | void make_request (client, lease) |
3259 | struct client_state *client; | |
cc26de46 | 3260 | struct client_lease *lease; |
c1503c57 | 3261 | { |
c1503c57 | 3262 | unsigned char request = DHCPREQUEST; |
02a015fb | 3263 | struct option_cache *oc; |
c1503c57 | 3264 | |
02d9e453 | 3265 | memset (&client -> packet, 0, sizeof (client -> packet)); |
469cf3a4 | 3266 | |
02d9e453 | 3267 | if (client -> state == S_REQUESTING) |
230e73e4 | 3268 | oc = lookup_option (&dhcp_universe, lease -> options, |
02a015fb TL |
3269 | DHO_DHCP_SERVER_IDENTIFIER); |
3270 | else | |
3271 | oc = (struct option_cache *)0; | |
8dba80a6 | 3272 | |
98311e4b DH |
3273 | if (client -> sent_options) |
3274 | option_state_dereference (&client -> sent_options, MDL); | |
3275 | ||
02d9e453 TL |
3276 | make_client_options (client, lease, &request, oc, |
3277 | ((client -> state == S_REQUESTING || | |
3278 | client -> state == S_REBOOTING) | |
02a015fb TL |
3279 | ? &lease -> address |
3280 | : (struct iaddr *)0), | |
02d9e453 | 3281 | client -> config -> requested_options, |
d758ad8c | 3282 | &client -> sent_options); |
deff2d59 | 3283 | |
c1503c57 | 3284 | /* Set up the option buffer... */ |
02d9e453 | 3285 | client -> packet_length = |
da38df14 | 3286 | cons_options ((struct packet *)0, &client -> packet, |
98311e4b DH |
3287 | (struct lease *)0, client, |
3288 | /* maximum packet size */1500, | |
3289 | (struct option_state *)0, | |
3dbe2246 | 3290 | client -> sent_options, |
98311e4b DH |
3291 | /* scope */ &global_scope, |
3292 | /* overload */ 0, | |
3293 | /* terminate */0, | |
3294 | /* bootpp */0, | |
3295 | (struct data_string *)0, | |
ce75142f | 3296 | client -> config -> vendor_space_name); |
98311e4b | 3297 | |
02d9e453 TL |
3298 | if (client -> packet_length < BOOTP_MIN_LEN) |
3299 | client -> packet_length = BOOTP_MIN_LEN; | |
cc26de46 | 3300 | |
02d9e453 | 3301 | client -> packet.op = BOOTREQUEST; |
31730f17 | 3302 | client -> packet.htype = client -> interface -> hw_address.hbuf [0]; |
785c1a51 | 3303 | /* Assumes hw_address is known, otherwise a random value may result */ |
31730f17 | 3304 | client -> packet.hlen = client -> interface -> hw_address.hlen - 1; |
02d9e453 TL |
3305 | client -> packet.hops = 0; |
3306 | client -> packet.xid = client -> xid; | |
3307 | client -> packet.secs = 0; /* Filled in by send_request. */ | |
cc26de46 TL |
3308 | |
3309 | /* If we own the address we're requesting, put it in ciaddr; | |
3310 | otherwise set ciaddr to zero. */ | |
02d9e453 TL |
3311 | if (client -> state == S_BOUND || |
3312 | client -> state == S_RENEWING || | |
62d0cb47 | 3313 | client -> state == S_REBINDING) { |
02d9e453 | 3314 | memcpy (&client -> packet.ciaddr, |
cc26de46 | 3315 | lease -> address.iabuf, lease -> address.len); |
339b0231 | 3316 | client -> packet.flags = 0; |
62d0cb47 | 3317 | } else { |
02d9e453 TL |
3318 | memset (&client -> packet.ciaddr, 0, |
3319 | sizeof client -> packet.ciaddr); | |
f345b36d TL |
3320 | if (can_receive_unicast_unconfigured (client -> interface)) |
3321 | client -> packet.flags = 0; | |
3322 | else | |
3323 | client -> packet.flags = htons (BOOTP_BROADCAST); | |
62d0cb47 | 3324 | } |
02d9e453 TL |
3325 | |
3326 | memset (&client -> packet.yiaddr, 0, | |
3327 | sizeof client -> packet.yiaddr); | |
3328 | memset (&client -> packet.siaddr, 0, | |
3329 | sizeof client -> packet.siaddr); | |
1c44f6bd TL |
3330 | if (client -> state != S_BOUND && |
3331 | client -> state != S_RENEWING) | |
3332 | client -> packet.giaddr = giaddr; | |
3333 | else | |
3334 | memset (&client -> packet.giaddr, 0, | |
3335 | sizeof client -> packet.giaddr); | |
31730f17 TL |
3336 | if (client -> interface -> hw_address.hlen > 0) |
3337 | memcpy (client -> packet.chaddr, | |
3338 | &client -> interface -> hw_address.hbuf [1], | |
3339 | (unsigned)(client -> interface -> hw_address.hlen - 1)); | |
c1503c57 TL |
3340 | |
3341 | #ifdef DEBUG_PACKET | |
01aeb18a | 3342 | dump_raw ((unsigned char *)&client -> packet, client -> packet_length); |
c1503c57 | 3343 | #endif |
469cf3a4 | 3344 | } |
c1503c57 | 3345 | |
02d9e453 TL |
3346 | void make_decline (client, lease) |
3347 | struct client_state *client; | |
cc26de46 | 3348 | struct client_lease *lease; |
469cf3a4 | 3349 | { |
cc26de46 | 3350 | unsigned char decline = DHCPDECLINE; |
02a015fb | 3351 | struct option_cache *oc; |
c1503c57 | 3352 | |
230e73e4 | 3353 | struct option_state *options = (struct option_state *)0; |
c1503c57 | 3354 | |
40ec5f38 | 3355 | /* Create the options cache. */ |
230e73e4 | 3356 | oc = lookup_option (&dhcp_universe, lease -> options, |
02a015fb | 3357 | DHO_DHCP_SERVER_IDENTIFIER); |
0c20eab3 DH |
3358 | make_client_options(client, lease, &decline, oc, &lease->address, |
3359 | NULL, &options); | |
ca25f4ab | 3360 | |
40ec5f38 | 3361 | /* Consume the options cache into the option buffer. */ |
230e73e4 | 3362 | memset (&client -> packet, 0, sizeof (client -> packet)); |
02d9e453 | 3363 | client -> packet_length = |
da38df14 | 3364 | cons_options ((struct packet *)0, &client -> packet, |
66e9cecf | 3365 | (struct lease *)0, client, 0, |
0852a27f | 3366 | (struct option_state *)0, options, |
ce75142f TL |
3367 | &global_scope, 0, 0, 0, (struct data_string *)0, |
3368 | client -> config -> vendor_space_name); | |
40ec5f38 DH |
3369 | |
3370 | /* Destroy the options cache. */ | |
98311e4b | 3371 | option_state_dereference (&options, MDL); |
40ec5f38 | 3372 | |
02d9e453 TL |
3373 | if (client -> packet_length < BOOTP_MIN_LEN) |
3374 | client -> packet_length = BOOTP_MIN_LEN; | |
cc26de46 | 3375 | |
02d9e453 | 3376 | client -> packet.op = BOOTREQUEST; |
31730f17 | 3377 | client -> packet.htype = client -> interface -> hw_address.hbuf [0]; |
785c1a51 | 3378 | /* Assumes hw_address is known, otherwise a random value may result */ |
31730f17 | 3379 | client -> packet.hlen = client -> interface -> hw_address.hlen - 1; |
02d9e453 TL |
3380 | client -> packet.hops = 0; |
3381 | client -> packet.xid = client -> xid; | |
3382 | client -> packet.secs = 0; /* Filled in by send_request. */ | |
7d3bc735 TL |
3383 | if (can_receive_unicast_unconfigured (client -> interface)) |
3384 | client -> packet.flags = 0; | |
3385 | else | |
3386 | client -> packet.flags = htons (BOOTP_BROADCAST); | |
cc26de46 TL |
3387 | |
3388 | /* ciaddr must always be zero. */ | |
02d9e453 TL |
3389 | memset (&client -> packet.ciaddr, 0, |
3390 | sizeof client -> packet.ciaddr); | |
3391 | memset (&client -> packet.yiaddr, 0, | |
3392 | sizeof client -> packet.yiaddr); | |
3393 | memset (&client -> packet.siaddr, 0, | |
3394 | sizeof client -> packet.siaddr); | |
11373fb6 | 3395 | client -> packet.giaddr = giaddr; |
02d9e453 | 3396 | memcpy (client -> packet.chaddr, |
31730f17 | 3397 | &client -> interface -> hw_address.hbuf [1], |
02d9e453 | 3398 | client -> interface -> hw_address.hlen); |
cc26de46 TL |
3399 | |
3400 | #ifdef DEBUG_PACKET | |
01aeb18a | 3401 | dump_raw ((unsigned char *)&client -> packet, client -> packet_length); |
cc26de46 TL |
3402 | #endif |
3403 | } | |
3404 | ||
02d9e453 TL |
3405 | void make_release (client, lease) |
3406 | struct client_state *client; | |
cc26de46 TL |
3407 | struct client_lease *lease; |
3408 | { | |
3409 | unsigned char request = DHCPRELEASE; | |
02a015fb | 3410 | struct option_cache *oc; |
cc26de46 | 3411 | |
230e73e4 | 3412 | struct option_state *options = (struct option_state *)0; |
cc26de46 | 3413 | |
02d9e453 | 3414 | memset (&client -> packet, 0, sizeof (client -> packet)); |
469cf3a4 | 3415 | |
230e73e4 | 3416 | oc = lookup_option (&dhcp_universe, lease -> options, |
02a015fb | 3417 | DHO_DHCP_SERVER_IDENTIFIER); |
0c20eab3 | 3418 | make_client_options(client, lease, &request, oc, NULL, NULL, &options); |
469cf3a4 TL |
3419 | |
3420 | /* Set up the option buffer... */ | |
02d9e453 | 3421 | client -> packet_length = |
da38df14 | 3422 | cons_options ((struct packet *)0, &client -> packet, |
98311e4b DH |
3423 | (struct lease *)0, client, |
3424 | /* maximum packet size */1500, | |
3425 | (struct option_state *)0, | |
3426 | options, | |
3427 | /* scope */ &global_scope, | |
3428 | /* overload */ 0, | |
3429 | /* terminate */0, | |
3430 | /* bootpp */0, | |
3431 | (struct data_string *)0, | |
ce75142f | 3432 | client -> config -> vendor_space_name); |
98311e4b | 3433 | |
02d9e453 TL |
3434 | if (client -> packet_length < BOOTP_MIN_LEN) |
3435 | client -> packet_length = BOOTP_MIN_LEN; | |
cf78bf20 | 3436 | option_state_dereference (&options, MDL); |
02d9e453 TL |
3437 | |
3438 | client -> packet.op = BOOTREQUEST; | |
31730f17 | 3439 | client -> packet.htype = client -> interface -> hw_address.hbuf [0]; |
785c1a51 | 3440 | /* Assumes hw_address is known, otherwise a random value may result */ |
31730f17 | 3441 | client -> packet.hlen = client -> interface -> hw_address.hlen - 1; |
02d9e453 | 3442 | client -> packet.hops = 0; |
74f45f96 | 3443 | client -> packet.xid = random (); |
02d9e453 TL |
3444 | client -> packet.secs = 0; |
3445 | client -> packet.flags = 0; | |
3446 | memcpy (&client -> packet.ciaddr, | |
cc26de46 | 3447 | lease -> address.iabuf, lease -> address.len); |
02d9e453 TL |
3448 | memset (&client -> packet.yiaddr, 0, |
3449 | sizeof client -> packet.yiaddr); | |
3450 | memset (&client -> packet.siaddr, 0, | |
3451 | sizeof client -> packet.siaddr); | |
11373fb6 | 3452 | client -> packet.giaddr = giaddr; |
02d9e453 | 3453 | memcpy (client -> packet.chaddr, |
bdcaf7b9 | 3454 | &client -> interface -> hw_address.hbuf [1], |
02d9e453 | 3455 | client -> interface -> hw_address.hlen); |
469cf3a4 TL |
3456 | |
3457 | #ifdef DEBUG_PACKET | |
01aeb18a | 3458 | dump_raw ((unsigned char *)&client -> packet, client -> packet_length); |
469cf3a4 | 3459 | #endif |
e581d615 | 3460 | } |
cc26de46 | 3461 | |
02a015fb | 3462 | void destroy_client_lease (lease) |
cc26de46 TL |
3463 | struct client_lease *lease; |
3464 | { | |
cc26de46 | 3465 | if (lease -> server_name) |
cf78bf20 | 3466 | dfree (lease -> server_name, MDL); |
cc26de46 | 3467 | if (lease -> filename) |
cf78bf20 TL |
3468 | dfree (lease -> filename, MDL); |
3469 | option_state_dereference (&lease -> options, MDL); | |
3470 | free_client_lease (lease, MDL); | |
cc26de46 TL |
3471 | } |
3472 | ||
98bd7ca0 DH |
3473 | FILE *leaseFile = NULL; |
3474 | int leases_written = 0; | |
cc26de46 TL |
3475 | |
3476 | void rewrite_client_leases () | |
3477 | { | |
3478 | struct interface_info *ip; | |
02d9e453 | 3479 | struct client_state *client; |
cc26de46 TL |
3480 | struct client_lease *lp; |
3481 | ||
98bd7ca0 | 3482 | if (leaseFile != NULL) |
cc26de46 TL |
3483 | fclose (leaseFile); |
3484 | leaseFile = fopen (path_dhclient_db, "w"); | |
98bd7ca0 | 3485 | if (leaseFile == NULL) { |
ee8a3653 TL |
3486 | log_error ("can't create %s: %m", path_dhclient_db); |
3487 | return; | |
3488 | } | |
b00d3884 | 3489 | |
98bd7ca0 DH |
3490 | /* If there is a default duid, write it out. */ |
3491 | if (default_duid.len != 0) | |
3492 | write_duid(&default_duid); | |
3493 | ||
b00d3884 TL |
3494 | /* Write out all the leases attached to configured interfaces that |
3495 | we know about. */ | |
cc26de46 | 3496 | for (ip = interfaces; ip; ip = ip -> next) { |
02d9e453 TL |
3497 | for (client = ip -> client; client; client = client -> next) { |
3498 | for (lp = client -> leases; lp; lp = lp -> next) { | |
007e3ee4 | 3499 | write_client_lease (client, lp, 1, 0); |
02d9e453 TL |
3500 | } |
3501 | if (client -> active) | |
3502 | write_client_lease (client, | |
007e3ee4 | 3503 | client -> active, 1, 0); |
98bd7ca0 DH |
3504 | |
3505 | if (client->active_lease != NULL) | |
3506 | write_client6_lease(client, | |
3507 | client->active_lease, | |
3508 | 1, 0); | |
5d082abd TM |
3509 | |
3510 | /* Reset last_write after rewrites. */ | |
3511 | client->last_write = 0; | |
cc26de46 | 3512 | } |
cc26de46 | 3513 | } |
b00d3884 TL |
3514 | |
3515 | /* Write out any leases that are attached to interfaces that aren't | |
3516 | currently configured. */ | |
3517 | for (ip = dummy_interfaces; ip; ip = ip -> next) { | |
02d9e453 TL |
3518 | for (client = ip -> client; client; client = client -> next) { |
3519 | for (lp = client -> leases; lp; lp = lp -> next) { | |
007e3ee4 | 3520 | write_client_lease (client, lp, 1, 0); |
02d9e453 TL |
3521 | } |
3522 | if (client -> active) | |
3523 | write_client_lease (client, | |
007e3ee4 | 3524 | client -> active, 1, 0); |
98bd7ca0 DH |
3525 | |
3526 | if (client->active_lease != NULL) | |
3527 | write_client6_lease(client, | |
3528 | client->active_lease, | |
3529 | 1, 0); | |
5d082abd TM |
3530 | |
3531 | /* Reset last_write after rewrites. */ | |
3532 | client->last_write = 0; | |
b00d3884 | 3533 | } |
b00d3884 | 3534 | } |
cc26de46 TL |
3535 | fflush (leaseFile); |
3536 | } | |
3537 | ||
c0504523 TL |
3538 | void write_lease_option (struct option_cache *oc, |
3539 | struct packet *packet, struct lease *lease, | |
66e9cecf | 3540 | struct client_state *client_state, |
c0504523 TL |
3541 | struct option_state *in_options, |
3542 | struct option_state *cfg_options, | |
3543 | struct binding_scope **scope, | |
3544 | struct universe *u, void *stuff) | |
3545 | { | |
3546 | const char *name, *dot; | |
3547 | struct data_string ds; | |
98bd7ca0 | 3548 | char *preamble = stuff; |
b5f904a9 | 3549 | |
c0504523 TL |
3550 | memset (&ds, 0, sizeof ds); |
3551 | ||
3552 | if (u != &dhcp_universe) { | |
3553 | name = u -> name; | |
3554 | dot = "."; | |
3555 | } else { | |
3556 | name = ""; | |
3557 | dot = ""; | |
3558 | } | |
66e9cecf | 3559 | if (evaluate_option_cache (&ds, packet, lease, client_state, |
c0504523 | 3560 | in_options, cfg_options, scope, oc, MDL)) { |
35de6c8c SR |
3561 | /* The option name */ |
3562 | fprintf(leaseFile, "%soption %s%s%s", preamble, | |
3563 | name, dot, oc->option->name); | |
3564 | ||
3565 | /* The option value if there is one */ | |
3566 | if ((oc->option->format == NULL) || | |
3567 | (oc->option->format[0] != 'Z')) { | |
3568 | fprintf(leaseFile, " %s", | |
3569 | pretty_print_option(oc->option, ds.data, | |
3570 | ds.len, 1, 1)); | |
3571 | } | |
3572 | ||
3573 | /* The closing semi-colon and newline */ | |
3574 | fprintf(leaseFile, ";\n"); | |
3575 | ||
c0504523 TL |
3576 | data_string_forget (&ds, MDL); |
3577 | } | |
3578 | } | |
3579 | ||
98bd7ca0 DH |
3580 | /* Write an option cache to the lease store. */ |
3581 | static void | |
3582 | write_options(struct client_state *client, struct option_state *options, | |
06eb8bab | 3583 | const char *preamble) |
98bd7ca0 DH |
3584 | { |
3585 | int i; | |
3586 | ||
3587 | for (i = 0; i < options->universe_count; i++) { | |
3588 | option_space_foreach(NULL, NULL, client, NULL, options, | |
3dbe2246 | 3589 | &global_scope, universes[i], |
06eb8bab | 3590 | (char *)preamble, write_lease_option); |
98bd7ca0 DH |
3591 | } |
3592 | } | |
3593 | ||
d7d9c0c7 SR |
3594 | /* |
3595 | * The "best" default DUID, since we cannot predict any information | |
3596 | * about the system (such as whether or not the hardware addresses are | |
3597 | * integrated into the motherboard or similar), is the "LLT", link local | |
3598 | * plus time, DUID. For real stateless "LL" is better. | |
3599 | * | |
3600 | * Once generated, this duid is stored into the state database, and | |
3601 | * retained across restarts. | |
3602 | * | |
3603 | * For the time being, there is probably a different state database for | |
3604 | * every daemon, so this winds up being a per-interface identifier...which | |
3605 | * is not how it is intended. Upcoming rearchitecting the client should | |
3606 | * address this "one daemon model." | |
3607 | */ | |
3608 | void | |
3609 | form_duid(struct data_string *duid, const char *file, int line) | |
3610 | { | |
3611 | struct interface_info *ip; | |
3612 | int len; | |
79818c93 | 3613 | char *str; |
d7d9c0c7 SR |
3614 | |
3615 | /* For now, just use the first interface on the list. */ | |
3616 | ip = interfaces; | |
3617 | ||
3618 | if (ip == NULL) | |
3619 | log_fatal("Impossible condition at %s:%d.", MDL); | |
3620 | ||
3621 | if ((ip->hw_address.hlen == 0) || | |
3622 | (ip->hw_address.hlen > sizeof(ip->hw_address.hbuf))) | |
3623 | log_fatal("Impossible hardware address length at %s:%d.", MDL); | |
3624 | ||
3625 | if (duid_type == 0) | |
3626 | duid_type = stateless ? DUID_LL : DUID_LLT; | |
3627 | ||
3628 | /* | |
3629 | * 2 bytes for the 'duid type' field. | |
3630 | * 2 bytes for the 'htype' field. | |
3631 | * (DUID_LLT) 4 bytes for the 'current time'. | |
3632 | * enough bytes for the hardware address (note that hw_address has | |
3633 | * the 'htype' on byte zero). | |
3634 | */ | |
3635 | len = 4 + (ip->hw_address.hlen - 1); | |
3636 | if (duid_type == DUID_LLT) | |
3637 | len += 4; | |
3638 | if (!buffer_allocate(&duid->buffer, len, MDL)) | |
3639 | log_fatal("no memory for default DUID!"); | |
3640 | duid->data = duid->buffer->data; | |
3641 | duid->len = len; | |
3642 | ||
3643 | /* Basic Link Local Address type of DUID. */ | |
3644 | if (duid_type == DUID_LLT) { | |
3645 | putUShort(duid->buffer->data, DUID_LLT); | |
3646 | putUShort(duid->buffer->data + 2, ip->hw_address.hbuf[0]); | |
3647 | putULong(duid->buffer->data + 4, cur_time - DUID_TIME_EPOCH); | |
3648 | memcpy(duid->buffer->data + 8, ip->hw_address.hbuf + 1, | |
3649 | ip->hw_address.hlen - 1); | |
3650 | } else { | |
3651 | putUShort(duid->buffer->data, DUID_LL); | |
3652 | putUShort(duid->buffer->data + 2, ip->hw_address.hbuf[0]); | |
3653 | memcpy(duid->buffer->data + 4, ip->hw_address.hbuf + 1, | |
3654 | ip->hw_address.hlen - 1); | |
3655 | } | |
79818c93 | 3656 | |
cc1bd34e TM |
3657 | /* Now format the output based on lease-id-format */ |
3658 | str = format_lease_id(duid->data, duid->len, | |
3659 | top_level_config.lease_id_format, MDL); | |
3660 | if (str == NULL) { | |
3661 | log_info("form_duid: Couldn't allocate memory to log duid!"); | |
3662 | } else { | |
79818c93 SR |
3663 | log_info("Created duid %s.", str); |
3664 | dfree(str, MDL); | |
3665 | } | |
d7d9c0c7 SR |
3666 | } |
3667 | ||
98bd7ca0 DH |
3668 | /* Write the default DUID to the lease store. */ |
3669 | static isc_result_t | |
3670 | write_duid(struct data_string *duid) | |
3671 | { | |
3672 | char *str; | |
3673 | int stat; | |
3674 | ||
3675 | if ((duid == NULL) || (duid->len <= 2)) | |
98bf1607 | 3676 | return DHCP_R_INVALIDARG; |
98bd7ca0 DH |
3677 | |
3678 | if (leaseFile == NULL) { /* XXX? */ | |
3679 | leaseFile = fopen(path_dhclient_db, "w"); | |
3680 | if (leaseFile == NULL) { | |
3681 | log_error("can't create %s: %m", path_dhclient_db); | |
3682 | return ISC_R_IOERROR; | |
3683 | } | |
3684 | } | |
3685 | ||
cc1bd34e TM |
3686 | /* Generate a formatted duid string per lease-id-format */ |
3687 | str = format_lease_id(duid->data, duid->len, | |
3688 | top_level_config.lease_id_format, MDL); | |
98bd7ca0 DH |
3689 | if (str == NULL) |
3690 | return ISC_R_NOMEMORY; | |
3691 | ||
cc1bd34e | 3692 | stat = fprintf(leaseFile, "default-duid %s;\n", str); |
98bd7ca0 DH |
3693 | dfree(str, MDL); |
3694 | if (stat <= 0) | |
3695 | return ISC_R_IOERROR; | |
3696 | ||
3697 | if (fflush(leaseFile) != 0) | |
3698 | return ISC_R_IOERROR; | |
6705543f DH |
3699 | |
3700 | return ISC_R_SUCCESS; | |
98bd7ca0 DH |
3701 | } |
3702 | ||
3703 | /* Write a DHCPv6 lease to the store. */ | |
3704 | isc_result_t | |
3705 | write_client6_lease(struct client_state *client, struct dhc6_lease *lease, | |
3706 | int rewrite, int sync) | |
3707 | { | |
3708 | struct dhc6_ia *ia; | |
3709 | struct dhc6_addr *addr; | |
3710 | int stat; | |
1d9774ab | 3711 | const char *ianame; |
98bd7ca0 DH |
3712 | |
3713 | /* This should include the current lease. */ | |
3714 | if (!rewrite && (leases_written++ > 20)) { | |
3715 | rewrite_client_leases(); | |
3716 | leases_written = 0; | |
3717 | return ISC_R_SUCCESS; | |
3718 | } | |
3719 | ||
3720 | if (client == NULL || lease == NULL) | |
98bf1607 | 3721 | return DHCP_R_INVALIDARG; |
98bd7ca0 DH |
3722 | |
3723 | if (leaseFile == NULL) { /* XXX? */ | |
3724 | leaseFile = fopen(path_dhclient_db, "w"); | |
3725 | if (leaseFile == NULL) { | |
3726 | log_error("can't create %s: %m", path_dhclient_db); | |
3727 | return ISC_R_IOERROR; | |
3728 | } | |
3729 | } | |
3730 | ||
3731 | stat = fprintf(leaseFile, "lease6 {\n"); | |
3732 | if (stat <= 0) | |
3733 | return ISC_R_IOERROR; | |
3734 | ||
3735 | stat = fprintf(leaseFile, " interface \"%s\";\n", | |
3736 | client->interface->name); | |
3737 | if (stat <= 0) | |
3738 | return ISC_R_IOERROR; | |
3739 | ||
3740 | for (ia = lease->bindings ; ia != NULL ; ia = ia->next) { | |
1d9774ab FD |
3741 | switch (ia->ia_type) { |
3742 | case D6O_IA_NA: | |
3743 | default: | |
3744 | ianame = "ia-na"; | |
3745 | break; | |
3746 | case D6O_IA_TA: | |
3747 | ianame = "ia-ta"; | |
3748 | break; | |
3749 | case D6O_IA_PD: | |
3750 | ianame = "ia-pd"; | |
3751 | break; | |
3752 | } | |
cc1bd34e TM |
3753 | |
3754 | /* For some reason IAID was never octal or hex, but string or | |
3755 | * hex. Go figure. So for compatibilty's sake we will either | |
3756 | * do hex or "legacy" i.e string rather than octal. What a | |
3757 | * cluster. */ | |
3758 | switch(top_level_config.lease_id_format) { | |
3759 | case TOKEN_HEX: { | |
3760 | char* iaid_str = format_lease_id( | |
3761 | (const unsigned char *) &ia->iaid, 4, | |
3762 | top_level_config.lease_id_format, MDL); | |
3763 | ||
3764 | if (!iaid_str) { | |
3765 | log_error("Can't format iaid"); | |
3766 | return ISC_R_IOERROR; | |
3767 | } | |
3768 | ||
3769 | stat = fprintf(leaseFile, " %s %s {\n", | |
3770 | ianame, iaid_str); | |
3771 | dfree(iaid_str, MDL); | |
3772 | break; | |
3773 | } | |
3774 | ||
3775 | case TOKEN_OCTAL: | |
3776 | default: | |
3777 | stat = fprintf(leaseFile, " %s %s {\n", ianame, | |
3778 | print_hex_1(4, ia->iaid, 12)); | |
3779 | break; | |
3780 | } | |
3781 | ||
98bd7ca0 DH |
3782 | if (stat <= 0) |
3783 | return ISC_R_IOERROR; | |
3784 | ||
1d9774ab FD |
3785 | if (ia->ia_type != D6O_IA_TA) |
3786 | stat = fprintf(leaseFile, " starts %d;\n" | |
3787 | " renew %u;\n" | |
3788 | " rebind %u;\n", | |
3789 | (int)ia->starts, ia->renew, ia->rebind); | |
3790 | else | |
3791 | stat = fprintf(leaseFile, " starts %d;\n", | |
3792 | (int)ia->starts); | |
98bd7ca0 DH |
3793 | if (stat <= 0) |
3794 | return ISC_R_IOERROR; | |
3795 | ||
3796 | for (addr = ia->addrs ; addr != NULL ; addr = addr->next) { | |
1d9774ab FD |
3797 | if (ia->ia_type != D6O_IA_PD) |
3798 | stat = fprintf(leaseFile, | |
3799 | " iaaddr %s {\n", | |
3800 | piaddr(addr->address)); | |
3801 | else | |
3802 | stat = fprintf(leaseFile, | |
3803 | " iaprefix %s/%d {\n", | |
3804 | piaddr(addr->address), | |
3805 | (int)addr->plen); | |
98bd7ca0 DH |
3806 | if (stat <= 0) |
3807 | return ISC_R_IOERROR; | |
3808 | ||
3809 | stat = fprintf(leaseFile, " starts %d;\n" | |
3810 | " preferred-life %u;\n" | |
3811 | " max-life %u;\n", | |
6705543f | 3812 | (int)addr->starts, addr->preferred_life, |
98bd7ca0 DH |
3813 | addr->max_life); |
3814 | if (stat <= 0) | |
3815 | return ISC_R_IOERROR; | |
3816 | ||
3817 | if (addr->options != NULL) | |
3818 | write_options(client, addr->options, " "); | |
3819 | ||
3820 | stat = fprintf(leaseFile, " }\n"); | |
3821 | if (stat <= 0) | |
3822 | return ISC_R_IOERROR; | |
3823 | } | |
3824 | ||
3825 | if (ia->options != NULL) | |
3826 | write_options(client, ia->options, " "); | |
3827 | ||
3828 | stat = fprintf(leaseFile, " }\n"); | |
3829 | if (stat <= 0) | |
3830 | return ISC_R_IOERROR; | |
3831 | } | |
3832 | ||
cabdb9b1 FD |
3833 | if (lease->released) { |
3834 | stat = fprintf(leaseFile, " released;\n"); | |
3835 | if (stat <= 0) | |
3836 | return ISC_R_IOERROR; | |
3837 | } | |
3838 | ||
98bd7ca0 DH |
3839 | if (lease->options != NULL) |
3840 | write_options(client, lease->options, " "); | |
3841 | ||
3842 | stat = fprintf(leaseFile, "}\n"); | |
3843 | if (stat <= 0) | |
3844 | return ISC_R_IOERROR; | |
3845 | ||
3846 | if (fflush(leaseFile) != 0) | |
3847 | return ISC_R_IOERROR; | |
3848 | ||
3849 | if (sync) { | |
3850 | if (fsync(fileno(leaseFile)) < 0) { | |
3851 | log_error("write_client_lease: fsync(): %m"); | |
3852 | return ISC_R_IOERROR; | |
3853 | } | |
3854 | } | |
6705543f DH |
3855 | |
3856 | return ISC_R_SUCCESS; | |
98bd7ca0 DH |
3857 | } |
3858 | ||
007e3ee4 | 3859 | int write_client_lease (client, lease, rewrite, makesure) |
02d9e453 | 3860 | struct client_state *client; |
cc26de46 | 3861 | struct client_lease *lease; |
5c2f78b4 | 3862 | int rewrite; |
007e3ee4 | 3863 | int makesure; |
cc26de46 | 3864 | { |
02a015fb | 3865 | struct data_string ds; |
007e3ee4 | 3866 | int errors = 0; |
dd215f30 | 3867 | char *s; |
5e864416 | 3868 | const char *tval; |
5c2f78b4 TL |
3869 | |
3870 | if (!rewrite) { | |
3871 | if (leases_written++ > 20) { | |
3872 | rewrite_client_leases (); | |
3873 | leases_written = 0; | |
3874 | } | |
3875 | } | |
cc26de46 | 3876 | |
b00d3884 TL |
3877 | /* If the lease came from the config file, we don't need to stash |
3878 | a copy in the lease database. */ | |
3879 | if (lease -> is_static) | |
007e3ee4 | 3880 | return 1; |
b00d3884 | 3881 | |
98bd7ca0 | 3882 | if (leaseFile == NULL) { /* XXX */ |
cc26de46 | 3883 | leaseFile = fopen (path_dhclient_db, "w"); |
98bd7ca0 | 3884 | if (leaseFile == NULL) { |
ee8a3653 TL |
3885 | log_error ("can't create %s: %m", path_dhclient_db); |
3886 | return 0; | |
3887 | } | |
cc26de46 TL |
3888 | } |
3889 | ||
007e3ee4 | 3890 | errno = 0; |
cc26de46 | 3891 | fprintf (leaseFile, "lease {\n"); |
dd215f30 | 3892 | if (lease -> is_bootp) { |
66f973e4 | 3893 | fprintf (leaseFile, " bootp;\n"); |
dd215f30 TL |
3894 | if (errno) { |
3895 | ++errors; | |
3896 | errno = 0; | |
3897 | } | |
3898 | } | |
02d9e453 TL |
3899 | fprintf (leaseFile, " interface \"%s\";\n", |
3900 | client -> interface -> name); | |
dd215f30 TL |
3901 | if (errno) { |
3902 | ++errors; | |
3903 | errno = 0; | |
3904 | } | |
3905 | if (client -> name) { | |
02d9e453 | 3906 | fprintf (leaseFile, " name \"%s\";\n", client -> name); |
dd215f30 TL |
3907 | if (errno) { |
3908 | ++errors; | |
3909 | errno = 0; | |
3910 | } | |
3911 | } | |
cc26de46 TL |
3912 | fprintf (leaseFile, " fixed-address %s;\n", |
3913 | piaddr (lease -> address)); | |
dd215f30 TL |
3914 | if (errno) { |
3915 | ++errors; | |
3916 | errno = 0; | |
3917 | } | |
3918 | if (lease -> filename) { | |
3919 | s = quotify_string (lease -> filename, MDL); | |
3920 | if (s) { | |
3921 | fprintf (leaseFile, " filename \"%s\";\n", s); | |
3922 | if (errno) { | |
3923 | ++errors; | |
3924 | errno = 0; | |
3925 | } | |
3926 | dfree (s, MDL); | |
3927 | } else | |
3928 | errors++; | |
3929 | ||
3930 | } | |
23e10d37 DH |
3931 | if (lease->server_name != NULL) { |
3932 | s = quotify_string(lease->server_name, MDL); | |
3933 | if (s != NULL) { | |
3934 | fprintf(leaseFile, " server-name \"%s\";\n", s); | |
dd215f30 TL |
3935 | if (errno) { |
3936 | ++errors; | |
3937 | errno = 0; | |
3938 | } | |
23e10d37 | 3939 | dfree(s, MDL); |
dd215f30 TL |
3940 | } else |
3941 | ++errors; | |
3942 | } | |
3943 | if (lease -> medium) { | |
3944 | s = quotify_string (lease -> medium -> string, MDL); | |
3945 | if (s) { | |
3946 | fprintf (leaseFile, " medium \"%s\";\n", s); | |
3947 | if (errno) { | |
3948 | ++errors; | |
3949 | errno = 0; | |
3950 | } | |
3951 | dfree (s, MDL); | |
3952 | } else | |
3953 | errors++; | |
3954 | } | |
007e3ee4 TL |
3955 | if (errno != 0) { |
3956 | errors++; | |
3957 | errno = 0; | |
3958 | } | |
2455808f TL |
3959 | |
3960 | memset (&ds, 0, sizeof ds); | |
230e73e4 | 3961 | |
98bd7ca0 | 3962 | write_options(client, lease->options, " "); |
5c2f78b4 | 3963 | |
5e864416 DH |
3964 | tval = print_time(lease->renewal); |
3965 | if (tval == NULL || | |
3966 | fprintf(leaseFile, " renew %s\n", tval) < 0) | |
dd215f30 | 3967 | errors++; |
5e864416 DH |
3968 | |
3969 | tval = print_time(lease->rebind); | |
3970 | if (tval == NULL || | |
3971 | fprintf(leaseFile, " rebind %s\n", tval) < 0) | |
dd215f30 | 3972 | errors++; |
5e864416 DH |
3973 | |
3974 | tval = print_time(lease->expiry); | |
3975 | if (tval == NULL || | |
3976 | fprintf(leaseFile, " expire %s\n", tval) < 0) | |
dd215f30 | 3977 | errors++; |
5e864416 DH |
3978 | |
3979 | if (fprintf(leaseFile, "}\n") < 0) | |
dd215f30 | 3980 | errors++; |
5e864416 DH |
3981 | |
3982 | if (fflush(leaseFile) != 0) | |
007e3ee4 | 3983 | errors++; |
5e864416 | 3984 | |
5d082abd TM |
3985 | client->last_write = cur_time; |
3986 | ||
007e3ee4 TL |
3987 | if (!errors && makesure) { |
3988 | if (fsync (fileno (leaseFile)) < 0) { | |
3989 | log_info ("write_client_lease: %m"); | |
3990 | return 0; | |
3991 | } | |
3992 | } | |
5d082abd | 3993 | |
007e3ee4 | 3994 | return errors ? 0 : 1; |
cc26de46 TL |
3995 | } |
3996 | ||
3997 | /* Variables holding name of script and file pointer for writing to | |
3998 | script. Needless to say, this is not reentrant - only one script | |
3999 | can be invoked at a time. */ | |
4000 | char scriptName [256]; | |
4001 | FILE *scriptFile; | |
4002 | ||
27be804f TM |
4003 | /** |
4004 | * @brief Initializes basic variables for a script | |
4005 | * | |
4006 | * This function is called as an initial preparation for calling a script. | |
4007 | * It sets up a number of common env. variables that will be passed to | |
4008 | * the script. For actual script calling, see @ref script_go . | |
4009 | * | |
4010 | * @param client variables will be stored here (if null, the whole function | |
4011 | * is no-op) | |
4012 | * @param reason specified the reason for calling a script (must be non-null) | |
4013 | * @param medium if specified, defines medium type (may be null) | |
4014 | */ | |
4015 | void script_init(struct client_state *client, const char *reason, | |
4016 | struct string_list *medium) | |
cc26de46 | 4017 | { |
32a47563 | 4018 | struct string_list *sl, *next; |
cc26de46 | 4019 | |
02d9e453 | 4020 | if (client) { |
32a47563 TL |
4021 | for (sl = client -> env; sl; sl = next) { |
4022 | next = sl -> next; | |
4023 | dfree (sl, MDL); | |
4024 | } | |
4025 | client -> env = (struct string_list *)0; | |
4026 | client -> envc = 0; | |
3dbe2246 | 4027 | |
02d9e453 | 4028 | if (client -> interface) { |
32a47563 TL |
4029 | client_envadd (client, "", "interface", "%s", |
4030 | client -> interface -> name); | |
02d9e453 TL |
4031 | } |
4032 | if (client -> name) | |
32a47563 TL |
4033 | client_envadd (client, |
4034 | "", "client", "%s", client -> name); | |
4035 | if (medium) | |
4036 | client_envadd (client, | |
4037 | "", "medium", "%s", medium -> string); | |
4038 | ||
4039 | client_envadd (client, "", "reason", "%s", reason); | |
6f7081bd | 4040 | client_envadd (client, "", "pid", "%ld", (long int)getpid ()); |
3e88222f | 4041 | #if defined(DHCPv6) |
a68ec967 MS |
4042 | client_envadd (client, "", "dad_wait_time", "%ld", |
4043 | (long int)dad_wait_time); | |
3e88222f | 4044 | #endif |
9bdb9271 | 4045 | } |
cc26de46 TL |
4046 | } |
4047 | ||
c0504523 TL |
4048 | void client_option_envadd (struct option_cache *oc, |
4049 | struct packet *packet, struct lease *lease, | |
66e9cecf | 4050 | struct client_state *client_state, |
c0504523 TL |
4051 | struct option_state *in_options, |
4052 | struct option_state *cfg_options, | |
4053 | struct binding_scope **scope, | |
4054 | struct universe *u, void *stuff) | |
4055 | { | |
4056 | struct envadd_state *es = stuff; | |
4057 | struct data_string data; | |
4058 | memset (&data, 0, sizeof data); | |
4059 | ||
66e9cecf | 4060 | if (evaluate_option_cache (&data, packet, lease, client_state, |
c0504523 TL |
4061 | in_options, cfg_options, scope, oc, MDL)) { |
4062 | if (data.len) { | |
4063 | char name [256]; | |
4064 | if (dhcp_option_ev_name (name, sizeof name, | |
bea17697 SR |
4065 | oc->option)) { |
4066 | const char *value; | |
1405aa2d | 4067 | size_t length; |
bea17697 SR |
4068 | value = pretty_print_option(oc->option, |
4069 | data.data, | |
4070 | data.len, 0, 0); | |
1405aa2d | 4071 | length = strlen(value); |
bea17697 SR |
4072 | |
4073 | if (check_option_values(oc->option->universe, | |
4074 | oc->option->code, | |
4075 | value, length) == 0) { | |
4076 | client_envadd(es->client, es->prefix, | |
4077 | name, "%s", value); | |
4078 | } else { | |
4079 | log_error("suspect value in %s " | |
4080 | "option - discarded", | |
4081 | name); | |
4082 | } | |
c0504523 TL |
4083 | data_string_forget (&data, MDL); |
4084 | } | |
4085 | } | |
4086 | } | |
4087 | } | |
4088 | ||
27be804f TM |
4089 | /** |
4090 | * @brief Adds parameters to environment variables for a script | |
4091 | * | |
4092 | * This function add details of specified lease to a list of env. variables | |
4093 | * to be passed to a script. The lease details will be prepended with | |
4094 | * specified prefix (e.g. "old_") and added to the list stored in client. | |
4095 | * Following variables may be set: | |
4096 | * - ip_address | |
4097 | * - next_server | |
4098 | * - network_number | |
4099 | * - broadcast_address | |
4100 | * - filename | |
4101 | * - server_name | |
4102 | * - expiry | |
4103 | * | |
4104 | * @param client env. variables will be stored here | |
4105 | * @param prefix textual prefix to be added to each variable (e.g. "old_") | |
4106 | * @param lease lease details will be extracted from here | |
4107 | */ | |
4108 | void script_write_params(struct client_state *client, const char *prefix, | |
4109 | struct client_lease *lease) | |
cc26de46 TL |
4110 | { |
4111 | int i; | |
02a015fb TL |
4112 | struct data_string data; |
4113 | struct option_cache *oc; | |
c0504523 TL |
4114 | struct envadd_state es; |
4115 | ||
4116 | es.client = client; | |
4117 | es.prefix = prefix; | |
cc26de46 | 4118 | |
32a47563 TL |
4119 | client_envadd (client, |
4120 | prefix, "ip_address", "%s", piaddr (lease -> address)); | |
c6abd205 | 4121 | |
02b0bdc3 SR |
4122 | /* If we've set the next server address in the lease structure |
4123 | put it into an environment variable for the script */ | |
4124 | if (lease->next_srv_addr.len != 0) { | |
4125 | client_envadd(client, prefix, "next_server", "%s", | |
4126 | piaddr(lease->next_srv_addr)); | |
4127 | } | |
4128 | ||
c6abd205 TL |
4129 | /* For the benefit of Linux (and operating systems which may |
4130 | have similar needs), compute the network address based on | |
4131 | the supplied ip address and netmask, if provided. Also | |
4132 | compute the broadcast address (the host address all ones | |
4133 | broadcast address, not the host address all zeroes | |
4134 | broadcast address). */ | |
4135 | ||
02a015fb | 4136 | memset (&data, 0, sizeof data); |
230e73e4 | 4137 | oc = lookup_option (&dhcp_universe, lease -> options, DHO_SUBNET_MASK); |
66e9cecf TL |
4138 | if (oc && evaluate_option_cache (&data, (struct packet *)0, |
4139 | (struct lease *)0, client, | |
0852a27f | 4140 | (struct option_state *)0, |
da38df14 | 4141 | lease -> options, |
cf78bf20 | 4142 | &global_scope, oc, MDL)) { |
02a015fb TL |
4143 | if (data.len > 3) { |
4144 | struct iaddr netmask, subnet, broadcast; | |
4145 | ||
8a4e543b DH |
4146 | /* |
4147 | * No matter the length of the subnet-mask option, | |
4148 | * use only the first four octets. Note that | |
4149 | * subnet-mask options longer than 4 octets are not | |
4150 | * in conformance with RFC 2132, but servers with this | |
4151 | * flaw do exist. | |
4152 | */ | |
4153 | memcpy(netmask.iabuf, data.data, 4); | |
4154 | netmask.len = 4; | |
cf78bf20 | 4155 | data_string_forget (&data, MDL); |
02a015fb TL |
4156 | |
4157 | subnet = subnet_number (lease -> address, netmask); | |
4158 | if (subnet.len) { | |
32a47563 TL |
4159 | client_envadd (client, prefix, "network_number", |
4160 | "%s", piaddr (subnet)); | |
4161 | ||
4162 | oc = lookup_option (&dhcp_universe, | |
4163 | lease -> options, | |
4164 | DHO_BROADCAST_ADDRESS); | |
4165 | if (!oc || | |
4166 | !(evaluate_option_cache | |
4167 | (&data, (struct packet *)0, | |
66e9cecf | 4168 | (struct lease *)0, client, |
32a47563 TL |
4169 | (struct option_state *)0, |
4170 | lease -> options, | |
4171 | &global_scope, oc, MDL))) { | |
4172 | broadcast = broadcast_addr (subnet, netmask); | |
4173 | if (broadcast.len) { | |
4174 | client_envadd (client, | |
4175 | prefix, "broadcast_address", | |
a8c190df | 4176 | "%s", piaddr (broadcast)); |
c6abd205 | 4177 | } |
32a47563 | 4178 | } |
c6abd205 TL |
4179 | } |
4180 | } | |
cf78bf20 | 4181 | data_string_forget (&data, MDL); |
c6abd205 TL |
4182 | } |
4183 | ||
bea17697 SR |
4184 | if (lease->filename) { |
4185 | if (check_option_values(NULL, DHO_ROOT_PATH, | |
4186 | lease->filename, | |
4187 | strlen(lease->filename)) == 0) { | |
4188 | client_envadd(client, prefix, "filename", | |
4189 | "%s", lease->filename); | |
4190 | } else { | |
4191 | log_error("suspect value in %s " | |
4192 | "option - discarded", | |
4193 | lease->filename); | |
4194 | } | |
4195 | } | |
4196 | ||
4197 | if (lease->server_name) { | |
4198 | if (check_option_values(NULL, DHO_HOST_NAME, | |
4199 | lease->server_name, | |
4200 | strlen(lease->server_name)) == 0 ) { | |
4201 | client_envadd (client, prefix, "server_name", | |
4202 | "%s", lease->server_name); | |
4203 | } else { | |
4204 | log_error("suspect value in %s " | |
4205 | "option - discarded", | |
4206 | lease->server_name); | |
4207 | } | |
4208 | } | |
02a015fb | 4209 | |
c0504523 TL |
4210 | for (i = 0; i < lease -> options -> universe_count; i++) { |
4211 | option_space_foreach ((struct packet *)0, (struct lease *)0, | |
66e9cecf | 4212 | client, (struct option_state *)0, |
c0504523 TL |
4213 | lease -> options, &global_scope, |
4214 | universes [i], | |
4215 | &es, client_option_envadd); | |
cc26de46 | 4216 | } |
86bda88b TM |
4217 | |
4218 | client_envadd (client, prefix, "expiry", "%lu", | |
4219 | (unsigned long)(lease -> expiry)); | |
cc26de46 TL |
4220 | } |
4221 | ||
27be804f TM |
4222 | /** |
4223 | * @brief Write out the environent variable the client requested. | |
10613724 SR |
4224 | * Write out the environment variables for the objects that the |
4225 | * client requested. If the object was requested the variable will be: | |
4226 | * requested_<option_name>=1 | |
4227 | * If it wasn't requested there won't be a variable. | |
27be804f TM |
4228 | * |
4229 | * @param client client structure | |
10613724 | 4230 | */ |
27be804f | 4231 | void script_write_requested(struct client_state *client) |
10613724 SR |
4232 | { |
4233 | int i; | |
4234 | struct option **req; | |
4235 | char name[256]; | |
4236 | req = client->config->requested_options; | |
4237 | ||
4238 | if (req == NULL) | |
4239 | return; | |
4240 | ||
4241 | for (i = 0 ; req[i] != NULL ; i++) { | |
4242 | if ((req[i]->universe == &dhcp_universe) && | |
4243 | dhcp_option_ev_name(name, sizeof(name), req[i])) { | |
4244 | client_envadd(client, "requested_", name, "%d", 1); | |
4245 | } | |
4246 | } | |
4247 | } | |
4248 | ||
27be804f TM |
4249 | /** |
4250 | * @brief Calls external script. | |
4251 | * | |
4252 | * External script is specified either using -sf command line or | |
4253 | * script parameter in the configuration file. | |
4254 | * | |
4255 | * @param client specifies client information (environment variables, | |
4256 | * and other parameters will be extracted and passed to the script. | |
4257 | * @return If positive, it contains exit code of the process running script. | |
4258 | * If negative, returns the signal number that cause the script process | |
4259 | * to terminate. | |
4260 | */ | |
4261 | int script_go(struct client_state *client) | |
cc26de46 | 4262 | { |
32a47563 TL |
4263 | char *scriptName; |
4264 | char *argv [2]; | |
4265 | char **envp; | |
32a47563 TL |
4266 | char reason [] = "REASON=NBI"; |
4267 | static char client_path [] = CLIENT_PATH; | |
4268 | int i; | |
4269 | struct string_list *sp, *next; | |
4270 | int pid, wpid, wstatus; | |
cc26de46 | 4271 | |
b1423aed | 4272 | if (client) |
32a47563 | 4273 | scriptName = client -> config -> script_name; |
b1423aed TL |
4274 | else |
4275 | scriptName = top_level_config.script_name; | |
4276 | ||
4277 | envp = dmalloc (((client ? client -> envc : 2) + | |
4278 | client_env_count + 2) * sizeof (char *), MDL); | |
4279 | if (!envp) { | |
4280 | log_error ("No memory for client script environment."); | |
4281 | return 0; | |
4282 | } | |
4283 | i = 0; | |
4284 | /* Copy out the environment specified on the command line, | |
4285 | if any. */ | |
4286 | for (sp = client_env; sp; sp = sp -> next) { | |
4287 | envp [i++] = sp -> string; | |
4288 | } | |
4289 | /* Copy out the environment specified by dhclient. */ | |
4290 | if (client) { | |
32a47563 TL |
4291 | for (sp = client -> env; sp; sp = sp -> next) { |
4292 | envp [i++] = sp -> string; | |
4293 | } | |
32a47563 | 4294 | } else { |
b1423aed | 4295 | envp [i++] = reason; |
32a47563 | 4296 | } |
b1423aed TL |
4297 | /* Set $PATH. */ |
4298 | envp [i++] = client_path; | |
4299 | envp [i] = (char *)0; | |
32a47563 TL |
4300 | |
4301 | argv [0] = scriptName; | |
4302 | argv [1] = (char *)0; | |
4303 | ||
4304 | pid = fork (); | |
4305 | if (pid < 0) { | |
4306 | log_error ("fork: %m"); | |
4307 | wstatus = 0; | |
4308 | } else if (pid) { | |
4309 | do { | |
4310 | wpid = wait (&wstatus); | |
4311 | } while (wpid != pid && wpid > 0); | |
4312 | if (wpid < 0) { | |
4313 | log_error ("wait: %m"); | |
4314 | wstatus = 0; | |
4315 | } | |
4316 | } else { | |
4d97a043 DH |
4317 | /* We don't want to pass an open file descriptor for |
4318 | * dhclient.leases when executing dhclient-script. | |
4319 | */ | |
4320 | if (leaseFile != NULL) | |
4321 | fclose(leaseFile); | |
32a47563 TL |
4322 | execve (scriptName, argv, envp); |
4323 | log_error ("execve (%s, ...): %m", scriptName); | |
4324 | exit (0); | |
4325 | } | |
4326 | ||
4327 | if (client) { | |
4328 | for (sp = client -> env; sp; sp = next) { | |
4329 | next = sp -> next; | |
4330 | dfree (sp, MDL); | |
4331 | } | |
4332 | client -> env = (struct string_list *)0; | |
4333 | client -> envc = 0; | |
32a47563 | 4334 | } |
b1423aed | 4335 | dfree (envp, MDL); |
be62cf06 | 4336 | gettimeofday(&cur_tv, NULL); |
ed0f73ab TL |
4337 | return (WIFEXITED (wstatus) ? |
4338 | WEXITSTATUS (wstatus) : -WTERMSIG (wstatus)); | |
32a47563 TL |
4339 | } |
4340 | ||
4341 | void client_envadd (struct client_state *client, | |
4342 | const char *prefix, const char *name, const char *fmt, ...) | |
4343 | { | |
4344 | char spbuf [1024]; | |
4345 | char *s; | |
28868515 | 4346 | unsigned len; |
32a47563 TL |
4347 | struct string_list *val; |
4348 | va_list list; | |
4349 | ||
4350 | va_start (list, fmt); | |
4351 | len = vsnprintf (spbuf, sizeof spbuf, fmt, list); | |
4352 | va_end (list); | |
4353 | ||
4354 | val = dmalloc (strlen (prefix) + strlen (name) + 1 /* = */ + | |
4355 | len + sizeof *val, MDL); | |
8c785e79 TM |
4356 | if (!val) { |
4357 | log_error ("client_envadd: cannot allocate space for variable"); | |
32a47563 | 4358 | return; |
8c785e79 TM |
4359 | } |
4360 | ||
32a47563 TL |
4361 | s = val -> string; |
4362 | strcpy (s, prefix); | |
4363 | strcat (s, name); | |
4364 | s += strlen (s); | |
4365 | *s++ = '='; | |
4366 | if (len >= sizeof spbuf) { | |
4367 | va_start (list, fmt); | |
4368 | vsnprintf (s, len + 1, fmt, list); | |
4369 | va_end (list); | |
8c785e79 | 4370 | } else { |
32a47563 | 4371 | strcpy (s, spbuf); |
8c785e79 TM |
4372 | } |
4373 | ||
32a47563 TL |
4374 | val -> next = client -> env; |
4375 | client -> env = val; | |
4376 | client -> envc++; | |
cc26de46 TL |
4377 | } |
4378 | ||
32a47563 TL |
4379 | int dhcp_option_ev_name (buf, buflen, option) |
4380 | char *buf; | |
6ceb9118 | 4381 | size_t buflen; |
cc26de46 TL |
4382 | struct option *option; |
4383 | { | |
c0504523 TL |
4384 | int i, j; |
4385 | const char *s; | |
cc26de46 | 4386 | |
c0504523 TL |
4387 | j = 0; |
4388 | if (option -> universe != &dhcp_universe) { | |
4389 | s = option -> universe -> name; | |
4390 | i = 0; | |
3dbe2246 | 4391 | } else { |
c0504523 TL |
4392 | s = option -> name; |
4393 | i = 1; | |
cc26de46 TL |
4394 | } |
4395 | ||
c0504523 TL |
4396 | do { |
4397 | while (*s) { | |
4398 | if (j + 1 == buflen) | |
4399 | return 0; | |
4400 | if (*s == '-') | |
4401 | buf [j++] = '_'; | |
4402 | else | |
4403 | buf [j++] = *s; | |
4404 | ++s; | |
4405 | } | |
4406 | if (!i) { | |
4407 | s = option -> name; | |
4408 | if (j + 1 == buflen) | |
4409 | return 0; | |
4410 | buf [j++] = '_'; | |
4411 | } | |
4412 | ++i; | |
4413 | } while (i != 2); | |
4414 | ||
4415 | buf [j] = 0; | |
32a47563 | 4416 | return 1; |
cc26de46 | 4417 | } |
b00d3884 | 4418 | |
29b23207 | 4419 | void finish (char ret) |
b00d3884 | 4420 | { |
29b23207 FD |
4421 | if (no_daemon || dfd[0] == -1 || dfd[1] == -1) |
4422 | exit((int)ret); | |
4423 | if (write(dfd[1], &ret, 1) != 1) | |
4424 | log_fatal("write to parent: %m"); | |
4425 | (void) close(dfd[1]); | |
4426 | dfd[0] = dfd[1] = -1; | |
4427 | exit((int)ret); | |
4428 | } | |
4429 | ||
4430 | void detach () | |
4431 | { | |
4432 | char buf = 0; | |
b00d3884 TL |
4433 | |
4434 | /* Don't become a daemon if the user requested otherwise. */ | |
b8cf055d TL |
4435 | if (no_daemon) { |
4436 | write_client_pid_file (); | |
b00d3884 | 4437 | return; |
b8cf055d | 4438 | } |
b00d3884 TL |
4439 | |
4440 | /* Only do it once. */ | |
29b23207 | 4441 | if (dfd[0] == -1 || dfd[1] == -1) |
b00d3884 | 4442 | return; |
29b23207 FD |
4443 | |
4444 | /* Signal parent we started successfully. */ | |
4445 | if (write(dfd[1], &buf, 1) != 1) | |
4446 | log_fatal("write to parent: %m"); | |
4447 | (void) close(dfd[1]); | |
4448 | dfd[0] = dfd[1] = -1; | |
b00d3884 TL |
4449 | |
4450 | /* Stop logging to stderr... */ | |
4451 | log_perror = 0; | |
4452 | ||
b00d3884 | 4453 | /* Become session leader and get pid... */ |
dc9d7b08 | 4454 | (void) setsid (); |
b8cf055d | 4455 | |
62d0cb47 | 4456 | /* Close standard I/O descriptors. */ |
dc9d7b08 MA |
4457 | (void) close(0); |
4458 | (void) close(1); | |
4459 | (void) close(2); | |
62d0cb47 | 4460 | |
a609e69b | 4461 | /* Reopen them on /dev/null. */ |
dc9d7b08 MA |
4462 | (void) open("/dev/null", O_RDWR); |
4463 | (void) open("/dev/null", O_RDWR); | |
4464 | (void) open("/dev/null", O_RDWR); | |
a609e69b | 4465 | |
b8cf055d | 4466 | write_client_pid_file (); |
a546f2a7 | 4467 | |
ae566556 | 4468 | IGNORE_RET (chdir("/")); |
29b23207 | 4469 | |
b8cf055d TL |
4470 | } |
4471 | ||
4472 | void write_client_pid_file () | |
4473 | { | |
4474 | FILE *pf; | |
4475 | int pfdesc; | |
4476 | ||
4a5bfeac SR |
4477 | /* nothing to do if the user doesn't want a pid file */ |
4478 | if (no_pid_file == ISC_TRUE) { | |
4479 | return; | |
4480 | } | |
4481 | ||
b8cf055d TL |
4482 | pfdesc = open (path_dhclient_pid, O_CREAT | O_TRUNC | O_WRONLY, 0644); |
4483 | ||
4484 | if (pfdesc < 0) { | |
8ae2d595 | 4485 | log_error ("Can't create %s: %m", path_dhclient_pid); |
b8cf055d TL |
4486 | return; |
4487 | } | |
4488 | ||
4489 | pf = fdopen (pfdesc, "w"); | |
fb30f3fc SR |
4490 | if (!pf) { |
4491 | close(pfdesc); | |
8ae2d595 | 4492 | log_error ("Can't fdopen %s: %m", path_dhclient_pid); |
fb30f3fc | 4493 | } else { |
19ea90f7 | 4494 | fprintf (pf, "%ld\n", (long)getpid ()); |
b8cf055d TL |
4495 | fclose (pf); |
4496 | } | |
4497 | } | |
4498 | ||
b8cf055d TL |
4499 | void client_location_changed () |
4500 | { | |
4501 | struct interface_info *ip; | |
02d9e453 | 4502 | struct client_state *client; |
b8cf055d TL |
4503 | |
4504 | for (ip = interfaces; ip; ip = ip -> next) { | |
02d9e453 TL |
4505 | for (client = ip -> client; client; client = client -> next) { |
4506 | switch (client -> state) { | |
4507 | case S_SELECTING: | |
4508 | cancel_timeout (send_discover, client); | |
4509 | break; | |
b8cf055d | 4510 | |
02d9e453 TL |
4511 | case S_BOUND: |
4512 | cancel_timeout (state_bound, client); | |
4513 | break; | |
b8cf055d | 4514 | |
02d9e453 TL |
4515 | case S_REBOOTING: |
4516 | case S_REQUESTING: | |
4517 | case S_RENEWING: | |
4518 | cancel_timeout (send_request, client); | |
4519 | break; | |
b8cf055d | 4520 | |
02d9e453 TL |
4521 | case S_INIT: |
4522 | case S_REBINDING: | |
57710b89 | 4523 | case S_STOPPED: |
0f69ff73 | 4524 | case S_DECLINING: |
02d9e453 TL |
4525 | break; |
4526 | } | |
4527 | client -> state = S_INIT; | |
4528 | state_reboot (client); | |
b8cf055d | 4529 | } |
b8cf055d TL |
4530 | } |
4531 | } | |
6767b592 | 4532 | |
3dbe2246 | 4533 | void do_release(client) |
347de8bd TL |
4534 | struct client_state *client; |
4535 | { | |
007e3ee4 TL |
4536 | struct data_string ds; |
4537 | struct option_cache *oc; | |
4538 | ||
785c1a51 FD |
4539 | #if defined(DHCPv6) && defined(DHCP4o6) |
4540 | if (dhcpv4_over_dhcpv6 && (dhcp4o6_state <= 0)) { | |
4541 | if (dhcp4o6_state < 0) | |
4542 | dhcp4o6_poll(NULL); | |
4543 | client->pending = P_RELEASE; | |
4544 | return; | |
4545 | } | |
4546 | #endif | |
4547 | ||
57710b89 | 4548 | /* Pick a random xid. */ |
347de8bd TL |
4549 | client -> xid = random (); |
4550 | ||
bdcaf7b9 TL |
4551 | /* is there even a lease to release? */ |
4552 | if (client -> active) { | |
4553 | /* Make a DHCPRELEASE packet, and set appropriate per-interface | |
4554 | flags. */ | |
4555 | make_release (client, client -> active); | |
007e3ee4 TL |
4556 | |
4557 | memset (&ds, 0, sizeof ds); | |
4558 | oc = lookup_option (&dhcp_universe, | |
4559 | client -> active -> options, | |
4560 | DHO_DHCP_SERVER_IDENTIFIER); | |
4561 | if (oc && | |
4562 | evaluate_option_cache (&ds, (struct packet *)0, | |
66e9cecf | 4563 | (struct lease *)0, client, |
007e3ee4 TL |
4564 | (struct option_state *)0, |
4565 | client -> active -> options, | |
4566 | &global_scope, oc, MDL)) { | |
4567 | if (ds.len > 3) { | |
4568 | memcpy (client -> destination.iabuf, | |
4569 | ds.data, 4); | |
4570 | client -> destination.len = 4; | |
4571 | } else | |
4572 | client -> destination = iaddr_broadcast; | |
98311e4b DH |
4573 | |
4574 | data_string_forget (&ds, MDL); | |
007e3ee4 TL |
4575 | } else |
4576 | client -> destination = iaddr_broadcast; | |
bdcaf7b9 TL |
4577 | client -> first_sending = cur_time; |
4578 | client -> interval = client -> config -> initial_interval; | |
3dbe2246 | 4579 | |
bdcaf7b9 TL |
4580 | /* Zap the medium list... */ |
4581 | client -> medium = (struct string_list *)0; | |
3dbe2246 | 4582 | |
bdcaf7b9 TL |
4583 | /* Send out the first and only DHCPRELEASE packet. */ |
4584 | send_release (client); | |
347de8bd | 4585 | |
007e3ee4 | 4586 | /* Do the client script RELEASE operation. */ |
bdcaf7b9 TL |
4587 | script_init (client, |
4588 | "RELEASE", (struct string_list *)0); | |
4589 | if (client -> alias) | |
27be804f TM |
4590 | script_write_params(client, "alias_", |
4591 | client -> alias); | |
4592 | script_write_params(client, "old_", client -> active); | |
10613724 | 4593 | script_write_requested(client); |
27be804f | 4594 | script_go(client); |
bdcaf7b9 | 4595 | } |
007e3ee4 | 4596 | |
57710b89 TL |
4597 | /* Cancel any timeouts. */ |
4598 | cancel_timeout (state_bound, client); | |
4599 | cancel_timeout (send_discover, client); | |
4600 | cancel_timeout (state_init, client); | |
4601 | cancel_timeout (send_request, client); | |
4602 | cancel_timeout (state_reboot, client); | |
4603 | client -> state = S_STOPPED; | |
785c1a51 FD |
4604 | |
4605 | #if defined(DHCPv6) && defined(DHCP4o6) | |
4606 | if (dhcpv4_over_dhcpv6) | |
29b23207 | 4607 | finish(0); |
785c1a51 | 4608 | #endif |
347de8bd TL |
4609 | } |
4610 | ||
20916cae TL |
4611 | int dhclient_interface_shutdown_hook (struct interface_info *interface) |
4612 | { | |
4613 | do_release (interface -> client); | |
57710b89 | 4614 | |
20916cae TL |
4615 | return 1; |
4616 | } | |
347de8bd | 4617 | |
20916cae TL |
4618 | int dhclient_interface_discovery_hook (struct interface_info *tmp) |
4619 | { | |
4620 | struct interface_info *last, *ip; | |
4621 | /* See if we can find the client from dummy_interfaces */ | |
4622 | last = 0; | |
4623 | for (ip = dummy_interfaces; ip; ip = ip -> next) { | |
4624 | if (!strcmp (ip -> name, tmp -> name)) { | |
4625 | /* Remove from dummy_interfaces */ | |
4626 | if (last) { | |
4627 | ip = (struct interface_info *)0; | |
4628 | interface_reference (&ip, last -> next, MDL); | |
4629 | interface_dereference (&last -> next, MDL); | |
4630 | if (ip -> next) { | |
4631 | interface_reference (&last -> next, | |
4632 | ip -> next, MDL); | |
4633 | interface_dereference (&ip -> next, | |
4634 | MDL); | |
4635 | } | |
4636 | } else { | |
4637 | ip = (struct interface_info *)0; | |
4638 | interface_reference (&ip, | |
4639 | dummy_interfaces, MDL); | |
4640 | interface_dereference (&dummy_interfaces, MDL); | |
4641 | if (ip -> next) { | |
4642 | interface_reference (&dummy_interfaces, | |
4643 | ip -> next, MDL); | |
4644 | interface_dereference (&ip -> next, | |
4645 | MDL); | |
4646 | } | |
4647 | } | |
4648 | /* Copy "client" to tmp */ | |
4649 | if (ip -> client) { | |
4650 | tmp -> client = ip -> client; | |
4651 | tmp -> client -> interface = tmp; | |
4652 | } | |
4653 | interface_dereference (&ip, MDL); | |
4654 | break; | |
4655 | } | |
4656 | last = ip; | |
4657 | } | |
4658 | return 1; | |
4659 | } | |
347de8bd | 4660 | |
57710b89 TL |
4661 | isc_result_t dhclient_interface_startup_hook (struct interface_info *interface) |
4662 | { | |
4663 | struct interface_info *ip; | |
4664 | struct client_state *client; | |
4665 | ||
4666 | /* This code needs some rethinking. It doesn't test against | |
4667 | a signal name, and it just kind of bulls into doing something | |
4668 | that may or may not be appropriate. */ | |
4669 | ||
4670 | if (interfaces) { | |
4671 | interface_reference (&interface -> next, interfaces, MDL); | |
4672 | interface_dereference (&interfaces, MDL); | |
4673 | } | |
4674 | interface_reference (&interfaces, interface, MDL); | |
4675 | ||
4676 | discover_interfaces (DISCOVER_UNCONFIGURED); | |
4677 | ||
4678 | for (ip = interfaces; ip; ip = ip -> next) { | |
4679 | /* If interfaces were specified, don't configure | |
4680 | interfaces that weren't specified! */ | |
4681 | if (ip -> flags & INTERFACE_RUNNING || | |
4682 | (ip -> flags & (INTERFACE_REQUESTED | | |
4683 | INTERFACE_AUTOMATIC)) != | |
4684 | INTERFACE_REQUESTED) | |
4685 | continue; | |
4686 | script_init (ip -> client, | |
4687 | "PREINIT", (struct string_list *)0); | |
4688 | if (ip -> client -> alias) | |
27be804f TM |
4689 | script_write_params(ip -> client, "alias_", |
4690 | ip -> client -> alias); | |
4691 | script_go(ip -> client); | |
57710b89 | 4692 | } |
3dbe2246 FD |
4693 | |
4694 | discover_interfaces (interfaces_requested != 0 | |
57710b89 TL |
4695 | ? DISCOVER_REQUESTED |
4696 | : DISCOVER_RUNNING); | |
4697 | ||
4698 | for (ip = interfaces; ip; ip = ip -> next) { | |
4699 | if (ip -> flags & INTERFACE_RUNNING) | |
4700 | continue; | |
4701 | ip -> flags |= INTERFACE_RUNNING; | |
5d082abd TM |
4702 | for (client = ip->client ; client ; client = client->next) { |
4703 | client->state = S_INIT; | |
4704 | state_reboot(client); | |
57710b89 TL |
4705 | } |
4706 | } | |
4707 | return ISC_R_SUCCESS; | |
4708 | } | |
4709 | ||
6767b592 TL |
4710 | /* The client should never receive a relay agent information option, |
4711 | so if it does, log it and discard it. */ | |
4712 | ||
4713 | int parse_agent_information_option (packet, len, data) | |
4714 | struct packet *packet; | |
4715 | int len; | |
4716 | u_int8_t *data; | |
4717 | { | |
6767b592 TL |
4718 | return 1; |
4719 | } | |
4720 | ||
4721 | /* The client never sends relay agent information options. */ | |
4722 | ||
4723 | unsigned cons_agent_information_options (cfg_options, outpacket, | |
4724 | agentix, length) | |
4725 | struct option_state *cfg_options; | |
4726 | struct dhcp_packet *outpacket; | |
4727 | unsigned agentix; | |
4728 | unsigned length; | |
4729 | { | |
4730 | return length; | |
4731 | } | |
d758ad8c TL |
4732 | |
4733 | static void shutdown_exit (void *foo) | |
4734 | { | |
f950de77 SR |
4735 | /* get rid of the pid if we can */ |
4736 | if (no_pid_file == ISC_FALSE) | |
4737 | (void) unlink(path_dhclient_pid); | |
29b23207 | 4738 | finish(0); |
d758ad8c TL |
4739 | } |
4740 | ||
98bf1607 SR |
4741 | #if defined (NSUPDATE) |
4742 | /* | |
4743 | * If the first query fails, the updater MUST NOT delete the DNS name. It | |
4744 | * may be that the host whose lease on the server has expired has moved | |
4745 | * to another network and obtained a lease from a different server, | |
4746 | * which has caused the client's A RR to be replaced. It may also be | |
4747 | * that some other client has been configured with a name that matches | |
4748 | * the name of the DHCP client, and the policy was that the last client | |
4749 | * to specify the name would get the name. In this case, the DHCID RR | |
4750 | * will no longer match the updater's notion of the client-identity of | |
4751 | * the host pointed to by the DNS name. | |
4752 | * -- "Interaction between DHCP and DNS" | |
4753 | */ | |
4754 | ||
4755 | /* The first and second stages are pretty similar so we combine them */ | |
4756 | void | |
4757 | client_dns_remove_action(dhcp_ddns_cb_t *ddns_cb, | |
4758 | isc_result_t eresult) | |
4759 | { | |
4760 | ||
4761 | isc_result_t result; | |
4762 | ||
4763 | if ((eresult == ISC_R_SUCCESS) && | |
4764 | (ddns_cb->state == DDNS_STATE_REM_FW_YXDHCID)) { | |
4765 | /* Do the second stage of the FWD removal */ | |
4766 | ddns_cb->state = DDNS_STATE_REM_FW_NXRR; | |
4767 | ||
87132514 | 4768 | result = ddns_modify_fwd(ddns_cb, MDL); |
98bf1607 SR |
4769 | if (result == ISC_R_SUCCESS) { |
4770 | return; | |
4771 | } | |
4772 | } | |
4773 | ||
4774 | /* If we are done or have an error clean up */ | |
cca6a648 | 4775 | dhclient_ddns_cb_free(ddns_cb, MDL); |
98bf1607 SR |
4776 | return; |
4777 | } | |
4778 | ||
4779 | void | |
4780 | client_dns_remove(struct client_state *client, | |
4781 | struct iaddr *addr) | |
4782 | { | |
4783 | dhcp_ddns_cb_t *ddns_cb; | |
4784 | isc_result_t result; | |
4785 | ||
4786 | /* if we have an old ddns request for this client, cancel it */ | |
4787 | if (client->ddns_cb != NULL) { | |
87132514 | 4788 | ddns_cancel(client->ddns_cb, MDL); |
98bf1607 SR |
4789 | client->ddns_cb = NULL; |
4790 | } | |
cca6a648 | 4791 | |
98bf1607 SR |
4792 | ddns_cb = ddns_cb_alloc(MDL); |
4793 | if (ddns_cb != NULL) { | |
4794 | ddns_cb->address = *addr; | |
4795 | ddns_cb->timeout = 0; | |
4796 | ||
4797 | ddns_cb->state = DDNS_STATE_REM_FW_YXDHCID; | |
4798 | ddns_cb->flags = DDNS_UPDATE_ADDR; | |
4799 | ddns_cb->cur_func = client_dns_remove_action; | |
4800 | ||
4801 | result = client_dns_update(client, ddns_cb); | |
4802 | ||
4803 | if (result != ISC_R_TIMEDOUT) { | |
cca6a648 | 4804 | dhclient_ddns_cb_free(ddns_cb, MDL); |
98bf1607 SR |
4805 | } |
4806 | } | |
4807 | } | |
4808 | #endif | |
4809 | ||
d758ad8c TL |
4810 | isc_result_t dhcp_set_control_state (control_object_state_t oldstate, |
4811 | control_object_state_t newstate) | |
4812 | { | |
4813 | struct interface_info *ip; | |
4814 | struct client_state *client; | |
be62cf06 | 4815 | struct timeval tv; |
d758ad8c | 4816 | |
0895c955 SR |
4817 | if (newstate == server_shutdown) { |
4818 | /* Re-entry */ | |
4819 | if (shutdown_signal == SIGUSR1) | |
4820 | return ISC_R_SUCCESS; | |
4821 | /* Log shutdown on signal. */ | |
4822 | if ((shutdown_signal == SIGINT) || | |
4823 | (shutdown_signal == SIGTERM)) { | |
4824 | log_info("Received signal %d, initiating shutdown.", | |
4825 | shutdown_signal); | |
4826 | } | |
4827 | /* Mark it was called. */ | |
4828 | shutdown_signal = SIGUSR1; | |
4829 | } | |
4830 | ||
d758ad8c TL |
4831 | /* Do the right thing for each interface. */ |
4832 | for (ip = interfaces; ip; ip = ip -> next) { | |
4833 | for (client = ip -> client; client; client = client -> next) { | |
4834 | switch (newstate) { | |
4835 | case server_startup: | |
4836 | return ISC_R_SUCCESS; | |
4837 | ||
4838 | case server_running: | |
4839 | return ISC_R_SUCCESS; | |
4840 | ||
4841 | case server_shutdown: | |
4842 | if (client -> active && | |
4843 | client -> active -> expiry > cur_time) { | |
98bf1607 SR |
4844 | #if defined (NSUPDATE) |
4845 | if (client->config->do_forward_update) { | |
4846 | client_dns_remove(client, | |
4847 | &client->active->address); | |
4848 | } | |
4849 | #endif | |
d758ad8c TL |
4850 | do_release (client); |
4851 | } | |
4852 | break; | |
4853 | ||
4854 | case server_hibernate: | |
4855 | state_stop (client); | |
4856 | break; | |
4857 | ||
4858 | case server_awaken: | |
4859 | state_reboot (client); | |
4860 | break; | |
4861 | } | |
4862 | } | |
4863 | } | |
af5fa176 | 4864 | |
be62cf06 | 4865 | if (newstate == server_shutdown) { |
5d082abd TM |
4866 | tv.tv_sec = cur_tv.tv_sec; |
4867 | tv.tv_usec = cur_tv.tv_usec + 1; | |
4868 | add_timeout(&tv, shutdown_exit, 0, 0, 0); | |
be62cf06 | 4869 | } |
d758ad8c TL |
4870 | return ISC_R_SUCCESS; |
4871 | } | |
4872 | ||
98bf1607 SR |
4873 | #if defined (NSUPDATE) |
4874 | /* | |
4875 | * Called after a timeout if the DNS update failed on the previous try. | |
4876 | * Starts the retry process. If the retry times out it will schedule | |
4877 | * this routine to run again after a 10x wait. | |
98bd7ca0 DH |
4878 | */ |
4879 | void | |
98bf1607 | 4880 | client_dns_update_timeout (void *cp) |
98bd7ca0 | 4881 | { |
98bf1607 SR |
4882 | dhcp_ddns_cb_t *ddns_cb = (dhcp_ddns_cb_t *)cp; |
4883 | struct client_state *client = (struct client_state *)ddns_cb->lease; | |
4884 | isc_result_t status = ISC_R_FAILURE; | |
98bd7ca0 | 4885 | |
98bf1607 SR |
4886 | if ((client != NULL) && |
4887 | ((client->active != NULL) || | |
4888 | (client->active_lease != NULL))) | |
4889 | status = client_dns_update(client, ddns_cb); | |
98bd7ca0 | 4890 | |
98bf1607 SR |
4891 | /* |
4892 | * A status of timedout indicates that we started the update and | |
4893 | * have released control of the control block. Any other status | |
4894 | * indicates that we should clean up the control block. We either | |
4895 | * got a success which indicates that we didn't really need to | |
4896 | * send an update or some other error in which case we weren't able | |
4897 | * to start the update process. In both cases we still own | |
4898 | * the control block and should free it. | |
4899 | */ | |
4900 | if (status != ISC_R_TIMEDOUT) { | |
cca6a648 | 4901 | dhclient_ddns_cb_free(ddns_cb, MDL); |
98bd7ca0 DH |
4902 | } |
4903 | } | |
4904 | ||
98bf1607 SR |
4905 | /* |
4906 | * If the first query succeeds, the updater can conclude that it | |
4907 | * has added a new name whose only RRs are the A and DHCID RR records. | |
4908 | * The A RR update is now complete (and a client updater is finished, | |
4909 | * while a server might proceed to perform a PTR RR update). | |
4910 | * -- "Interaction between DHCP and DNS" | |
4911 | * | |
4912 | * If the second query succeeds, the updater can conclude that the current | |
4913 | * client was the last client associated with the domain name, and that | |
4914 | * the name now contains the updated A RR. The A RR update is now | |
4915 | * complete (and a client updater is finished, while a server would | |
4916 | * then proceed to perform a PTR RR update). | |
4917 | * -- "Interaction between DHCP and DNS" | |
4918 | * | |
4919 | * If the second query fails with NXRRSET, the updater must conclude | |
4920 | * that the client's desired name is in use by another host. At this | |
4921 | * juncture, the updater can decide (based on some administrative | |
4922 | * configuration outside of the scope of this document) whether to let | |
4923 | * the existing owner of the name keep that name, and to (possibly) | |
4924 | * perform some name disambiguation operation on behalf of the current | |
4925 | * client, or to replace the RRs on the name with RRs that represent | |
4926 | * the current client. If the configured policy allows replacement of | |
4927 | * existing records, the updater submits a query that deletes the | |
4928 | * existing A RR and the existing DHCID RR, adding A and DHCID RRs that | |
4929 | * represent the IP address and client-identity of the new client. | |
4930 | * -- "Interaction between DHCP and DNS" | |
4931 | */ | |
98311e4b | 4932 | |
98bf1607 SR |
4933 | /* The first and second stages are pretty similar so we combine them */ |
4934 | void | |
4935 | client_dns_update_action(dhcp_ddns_cb_t *ddns_cb, | |
4936 | isc_result_t eresult) | |
98311e4b | 4937 | { |
98bf1607 | 4938 | isc_result_t result; |
be62cf06 | 4939 | struct timeval tv; |
98311e4b | 4940 | |
98bf1607 SR |
4941 | switch(eresult) { |
4942 | case ISC_R_SUCCESS: | |
4943 | default: | |
4944 | /* Either we succeeded or broke in a bad way, clean up */ | |
4945 | break; | |
4946 | ||
4947 | case DNS_R_YXRRSET: | |
4948 | /* | |
4949 | * This is the only difference between the two stages, | |
4950 | * check to see if it is the first stage, in which case | |
4951 | * start the second stage | |
4952 | */ | |
4953 | if (ddns_cb->state == DDNS_STATE_ADD_FW_NXDOMAIN) { | |
4954 | ddns_cb->state = DDNS_STATE_ADD_FW_YXDHCID; | |
4955 | ddns_cb->cur_func = client_dns_update_action; | |
4956 | ||
87132514 | 4957 | result = ddns_modify_fwd(ddns_cb, MDL); |
98bf1607 SR |
4958 | if (result == ISC_R_SUCCESS) { |
4959 | return; | |
4960 | } | |
4961 | } | |
4962 | break; | |
4963 | ||
4964 | case ISC_R_TIMEDOUT: | |
4965 | /* | |
4966 | * We got a timeout response from the DNS module. Schedule | |
4967 | * another attempt for later. We forget the name, dhcid and | |
4968 | * zone so if it gets changed we will get the new information. | |
4969 | */ | |
4970 | data_string_forget(&ddns_cb->fwd_name, MDL); | |
4971 | data_string_forget(&ddns_cb->dhcid, MDL); | |
4972 | if (ddns_cb->zone != NULL) { | |
4973 | forget_zone((struct dns_zone **)&ddns_cb->zone); | |
4974 | } | |
4975 | ||
4976 | /* Reset to doing the first stage */ | |
4977 | ddns_cb->state = DDNS_STATE_ADD_FW_NXDOMAIN; | |
4978 | ddns_cb->cur_func = client_dns_update_action; | |
4979 | ||
4980 | /* and update our timer */ | |
4981 | if (ddns_cb->timeout < 3600) | |
4982 | ddns_cb->timeout *= 10; | |
5d082abd TM |
4983 | tv.tv_sec = cur_tv.tv_sec + ddns_cb->timeout; |
4984 | tv.tv_usec = cur_tv.tv_usec; | |
be62cf06 | 4985 | add_timeout(&tv, client_dns_update_timeout, |
98bf1607 SR |
4986 | ddns_cb, NULL, NULL); |
4987 | return; | |
4988 | } | |
4989 | ||
cca6a648 | 4990 | dhclient_ddns_cb_free(ddns_cb, MDL); |
98bf1607 | 4991 | return; |
98311e4b DH |
4992 | } |
4993 | ||
d758ad8c TL |
4994 | /* See if we should do a DNS update, and if so, do it. */ |
4995 | ||
98bf1607 SR |
4996 | isc_result_t |
4997 | client_dns_update(struct client_state *client, dhcp_ddns_cb_t *ddns_cb) | |
d758ad8c | 4998 | { |
98bf1607 | 4999 | struct data_string client_identifier; |
d758ad8c TL |
5000 | struct option_cache *oc; |
5001 | int ignorep; | |
5002 | int result; | |
d7d9c0c7 | 5003 | int ddns_v4_type; |
d758ad8c TL |
5004 | isc_result_t rcode; |
5005 | ||
5006 | /* If we didn't send an FQDN option, we certainly aren't going to | |
5007 | be doing an update. */ | |
5008 | if (!client -> sent_options) | |
98311e4b | 5009 | return ISC_R_SUCCESS; |
d758ad8c TL |
5010 | |
5011 | /* If we don't have a lease, we can't do an update. */ | |
98bd7ca0 | 5012 | if ((client->active == NULL) && (client->active_lease == NULL)) |
98311e4b | 5013 | return ISC_R_SUCCESS; |
d758ad8c TL |
5014 | |
5015 | /* If we set the no client update flag, don't do the update. */ | |
5016 | if ((oc = lookup_option (&fqdn_universe, client -> sent_options, | |
5017 | FQDN_NO_CLIENT_UPDATE)) && | |
5018 | evaluate_boolean_option_cache (&ignorep, (struct packet *)0, | |
5019 | (struct lease *)0, client, | |
5020 | client -> sent_options, | |
5021 | (struct option_state *)0, | |
5022 | &global_scope, oc, MDL)) | |
98311e4b | 5023 | return ISC_R_SUCCESS; |
3dbe2246 | 5024 | |
d758ad8c TL |
5025 | /* If we set the "server, please update" flag, or didn't set it |
5026 | to false, don't do the update. */ | |
5027 | if (!(oc = lookup_option (&fqdn_universe, client -> sent_options, | |
5028 | FQDN_SERVER_UPDATE)) || | |
5029 | evaluate_boolean_option_cache (&ignorep, (struct packet *)0, | |
5030 | (struct lease *)0, client, | |
5031 | client -> sent_options, | |
5032 | (struct option_state *)0, | |
5033 | &global_scope, oc, MDL)) | |
98311e4b | 5034 | return ISC_R_SUCCESS; |
3dbe2246 | 5035 | |
d758ad8c | 5036 | /* If no FQDN option was supplied, don't do the update. */ |
d758ad8c TL |
5037 | if (!(oc = lookup_option (&fqdn_universe, client -> sent_options, |
5038 | FQDN_FQDN)) || | |
98bf1607 | 5039 | !evaluate_option_cache (&ddns_cb->fwd_name, (struct packet *)0, |
d758ad8c TL |
5040 | (struct lease *)0, client, |
5041 | client -> sent_options, | |
5042 | (struct option_state *)0, | |
5043 | &global_scope, oc, MDL)) | |
98311e4b | 5044 | return ISC_R_SUCCESS; |
d758ad8c | 5045 | |
d7d9c0c7 SR |
5046 | /* |
5047 | * Construct the DHCID value for use in the DDNS update process | |
5048 | * We have the newer standard version and the older interim version | |
5049 | * chosen by the '-I' option. The interim version is left as is | |
5050 | * for backwards compatibility. The standard version is based on | |
5051 | * RFC 4701 section 3.3 | |
98bd7ca0 | 5052 | */ |
d7d9c0c7 | 5053 | |
6705543f | 5054 | result = 0; |
dc9d7b08 | 5055 | POST(result); |
98bd7ca0 | 5056 | memset(&client_identifier, 0, sizeof(client_identifier)); |
d7d9c0c7 SR |
5057 | |
5058 | if (std_dhcid == 1) { | |
5059 | /* standard style */ | |
5060 | ddns_cb->dhcid_class = dns_rdatatype_dhcid; | |
5061 | ddns_v4_type = 1; | |
5062 | } else { | |
5063 | /* interim style */ | |
5064 | ddns_cb->dhcid_class = dns_rdatatype_txt; | |
5065 | /* for backwards compatibility */ | |
5066 | ddns_v4_type = DHO_DHCP_CLIENT_IDENTIFIER; | |
5067 | } | |
98bd7ca0 | 5068 | if (client->active_lease != NULL) { |
d7d9c0c7 | 5069 | /* V6 request, get the client identifier, then |
cca6a648 | 5070 | * construct the dhcid for either standard |
d7d9c0c7 SR |
5071 | * or interim */ |
5072 | if (((oc = lookup_option(&dhcpv6_universe, | |
5073 | client->sent_options, | |
5074 | D6O_CLIENTID)) != NULL) && | |
5075 | evaluate_option_cache(&client_identifier, NULL, | |
5076 | NULL, client, | |
5077 | client->sent_options, NULL, | |
98bd7ca0 | 5078 | &global_scope, oc, MDL)) { |
d7d9c0c7 | 5079 | result = get_dhcid(ddns_cb, 2, |
98bd7ca0 DH |
5080 | client_identifier.data, |
5081 | client_identifier.len); | |
5082 | data_string_forget(&client_identifier, MDL); | |
5083 | } else | |
5084 | log_fatal("Impossible condition at %s:%d.", MDL); | |
5085 | } else { | |
d7d9c0c7 SR |
5086 | /* |
5087 | * V4 request, use the client id if there is one or the | |
5088 | * mac address if there isn't. If we have a client id | |
5089 | * we check to see if it is an embedded DUID. | |
5090 | */ | |
5091 | if (((oc = lookup_option(&dhcp_universe, | |
5092 | client->sent_options, | |
5093 | DHO_DHCP_CLIENT_IDENTIFIER)) != NULL) && | |
5094 | evaluate_option_cache(&client_identifier, NULL, | |
5095 | NULL, client, | |
5096 | client->sent_options, NULL, | |
98bd7ca0 | 5097 | &global_scope, oc, MDL)) { |
d7d9c0c7 SR |
5098 | if ((std_dhcid == 1) && (duid_v4 == 1) && |
5099 | (client_identifier.data[0] == 255)) { | |
5100 | /* | |
5101 | * This appears to be an embedded DUID, | |
5102 | * extract it and treat it as such | |
5103 | */ | |
5104 | if (client_identifier.len <= 5) | |
5105 | log_fatal("Impossible condition at %s:%d.", | |
5106 | MDL); | |
5107 | result = get_dhcid(ddns_cb, 2, | |
5108 | client_identifier.data + 5, | |
5109 | client_identifier.len - 5); | |
5110 | } else { | |
5111 | result = get_dhcid(ddns_cb, ddns_v4_type, | |
5112 | client_identifier.data, | |
5113 | client_identifier.len); | |
5114 | } | |
98bd7ca0 DH |
5115 | data_string_forget(&client_identifier, MDL); |
5116 | } else | |
d7d9c0c7 | 5117 | result = get_dhcid(ddns_cb, 0, |
98bd7ca0 DH |
5118 | client->interface->hw_address.hbuf, |
5119 | client->interface->hw_address.hlen); | |
5120 | } | |
d7d9c0c7 | 5121 | |
d758ad8c | 5122 | if (!result) { |
98311e4b | 5123 | return ISC_R_SUCCESS; |
d758ad8c TL |
5124 | } |
5125 | ||
d758ad8c TL |
5126 | /* |
5127 | * Perform updates. | |
5128 | */ | |
98bf1607 | 5129 | if (ddns_cb->fwd_name.len && ddns_cb->dhcid.len) { |
87132514 | 5130 | rcode = ddns_modify_fwd(ddns_cb, MDL); |
98311e4b DH |
5131 | } else |
5132 | rcode = ISC_R_FAILURE; | |
3dbe2246 | 5133 | |
98bf1607 SR |
5134 | /* |
5135 | * A success from the modify routine means we are performing | |
5136 | * async processing, for which we use the timedout error message. | |
5137 | */ | |
5138 | if (rcode == ISC_R_SUCCESS) { | |
5139 | rcode = ISC_R_TIMEDOUT; | |
5140 | } | |
5141 | ||
98311e4b | 5142 | return rcode; |
d758ad8c | 5143 | } |
98bd7ca0 | 5144 | |
98bf1607 SR |
5145 | |
5146 | /* | |
5147 | * Schedule the first update. They will continue to retry occasionally | |
5148 | * until they no longer time out (or fail). | |
5149 | */ | |
5150 | void | |
5151 | dhclient_schedule_updates(struct client_state *client, | |
5152 | struct iaddr *addr, | |
5153 | int offset) | |
5154 | { | |
5155 | dhcp_ddns_cb_t *ddns_cb; | |
5156 | struct timeval tv; | |
5157 | ||
5158 | if (!client->config->do_forward_update) | |
5159 | return; | |
5160 | ||
5161 | /* cancel any outstanding ddns requests */ | |
5162 | if (client->ddns_cb != NULL) { | |
87132514 | 5163 | ddns_cancel(client->ddns_cb, MDL); |
98bf1607 SR |
5164 | client->ddns_cb = NULL; |
5165 | } | |
5166 | ||
5167 | ddns_cb = ddns_cb_alloc(MDL); | |
5168 | ||
5169 | if (ddns_cb != NULL) { | |
5170 | ddns_cb->lease = (void *)client; | |
5171 | ddns_cb->address = *addr; | |
5172 | ddns_cb->timeout = 1; | |
5173 | ||
5174 | /* | |
5175 | * XXX: DNS TTL is a problem we need to solve properly. | |
5176 | * Until that time, 300 is a placeholder default for | |
5177 | * something that is less insane than a value scaled | |
5178 | * by lease timeout. | |
5179 | */ | |
5180 | ddns_cb->ttl = 300; | |
5181 | ||
5182 | ddns_cb->state = DDNS_STATE_ADD_FW_NXDOMAIN; | |
5183 | ddns_cb->cur_func = client_dns_update_action; | |
5184 | ddns_cb->flags = DDNS_UPDATE_ADDR | DDNS_INCLUDE_RRSET; | |
5185 | ||
5186 | client->ddns_cb = ddns_cb; | |
5d082abd TM |
5187 | tv.tv_sec = cur_tv.tv_sec + offset; |
5188 | tv.tv_usec = cur_tv.tv_usec; | |
98bf1607 SR |
5189 | add_timeout(&tv, client_dns_update_timeout, |
5190 | ddns_cb, NULL, NULL); | |
5191 | } else { | |
5192 | log_error("Unable to allocate dns update state for %s", | |
5193 | piaddr(*addr)); | |
5194 | } | |
5195 | } | |
5196 | #endif | |
5197 | ||
98bd7ca0 DH |
5198 | void |
5199 | dhcpv4_client_assignments(void) | |
5200 | { | |
5201 | struct servent *ent; | |
5202 | ||
5203 | if (path_dhclient_pid == NULL) | |
5204 | path_dhclient_pid = _PATH_DHCLIENT_PID; | |
5205 | if (path_dhclient_db == NULL) | |
5206 | path_dhclient_db = _PATH_DHCLIENT_DB; | |
5207 | ||
5208 | /* Default to the DHCP/BOOTP port. */ | |
5209 | if (!local_port) { | |
5210 | /* If we're faking a relay agent, and we're not using loopback, | |
5211 | use the server port, not the client port. */ | |
02b0bdc3 | 5212 | if (mockup_relay && giaddr.s_addr != htonl(INADDR_LOOPBACK)) { |
98bd7ca0 DH |
5213 | local_port = htons(67); |
5214 | } else { | |
02b0bdc3 SR |
5215 | ent = getservbyname("dhcpc", "udp"); |
5216 | if (ent == NULL) | |
5217 | ent = getservbyname("bootpc", "udp"); | |
5218 | if (ent == NULL) | |
5219 | local_port = htons(68); | |
98bd7ca0 | 5220 | else |
02b0bdc3 | 5221 | local_port = ent->s_port; |
98bd7ca0 DH |
5222 | #ifndef __CYGWIN32__ |
5223 | endservent (); | |
5224 | #endif | |
5225 | } | |
5226 | } | |
5227 | ||
5228 | /* If we're faking a relay agent, and we're not using loopback, | |
5229 | we're using the server port, not the client port. */ | |
02b0bdc3 | 5230 | if (mockup_relay && giaddr.s_addr != htonl(INADDR_LOOPBACK)) { |
98bd7ca0 DH |
5231 | remote_port = local_port; |
5232 | } else | |
02b0bdc3 | 5233 | remote_port = htons(ntohs(local_port) - 1); /* XXX */ |
98bd7ca0 | 5234 | } |
bea17697 SR |
5235 | |
5236 | /* | |
5237 | * The following routines are used to check that certain | |
5238 | * strings are reasonable before we pass them to the scripts. | |
5239 | * This avoids some problems with scripts treating the strings | |
5240 | * as commands - see ticket 23722 | |
5241 | * The domain checking code should be done as part of assembling | |
5242 | * the string but we are doing it here for now due to time | |
5243 | * constraints. | |
5244 | */ | |
5245 | ||
5246 | static int check_domain_name(const char *ptr, size_t len, int dots) | |
5247 | { | |
5248 | const char *p; | |
5249 | ||
5250 | /* not empty or complete length not over 255 characters */ | |
5251 | if ((len == 0) || (len > 256)) | |
5252 | return(-1); | |
5253 | ||
5254 | /* consists of [[:alnum:]-]+ labels separated by [.] */ | |
5255 | /* a [_] is against RFC but seems to be "widely used"... */ | |
5256 | for (p=ptr; (*p != 0) && (len-- > 0); p++) { | |
5257 | if ((*p == '-') || (*p == '_')) { | |
5258 | /* not allowed at begin or end of a label */ | |
5259 | if (((p - ptr) == 0) || (len == 0) || (p[1] == '.')) | |
5260 | return(-1); | |
5261 | } else if (*p == '.') { | |
5262 | /* each label has to be 1-63 characters; | |
5263 | we allow [.] at the end ('foo.bar.') */ | |
5264 | size_t d = p - ptr; | |
5265 | if ((d <= 0) || (d >= 64)) | |
5266 | return(-1); | |
5267 | ptr = p + 1; /* jump to the next label */ | |
5268 | if ((dots > 0) && (len > 0)) | |
5269 | dots--; | |
5270 | } else if (isalnum((unsigned char)*p) == 0) { | |
5271 | /* also numbers at the begin are fine */ | |
5272 | return(-1); | |
5273 | } | |
5274 | } | |
5275 | return(dots ? -1 : 0); | |
5276 | } | |
5277 | ||
5278 | static int check_domain_name_list(const char *ptr, size_t len, int dots) | |
5279 | { | |
5280 | const char *p; | |
5281 | int ret = -1; /* at least one needed */ | |
5282 | ||
5283 | if ((ptr == NULL) || (len == 0)) | |
5284 | return(-1); | |
5285 | ||
5286 | for (p=ptr; (*p != 0) && (len > 0); p++, len--) { | |
5287 | if (*p != ' ') | |
5288 | continue; | |
5289 | if (p > ptr) { | |
5290 | if (check_domain_name(ptr, p - ptr, dots) != 0) | |
5291 | return(-1); | |
5292 | ret = 0; | |
5293 | } | |
5294 | ptr = p + 1; | |
5295 | } | |
5296 | if (p > ptr) | |
5297 | return(check_domain_name(ptr, p - ptr, dots)); | |
5298 | else | |
5299 | return(ret); | |
5300 | } | |
5301 | ||
5302 | static int check_option_values(struct universe *universe, | |
5303 | unsigned int opt, | |
5304 | const char *ptr, | |
5305 | size_t len) | |
5306 | { | |
5307 | if (ptr == NULL) | |
5308 | return(-1); | |
5309 | ||
5310 | /* just reject options we want to protect, will be escaped anyway */ | |
5311 | if ((universe == NULL) || (universe == &dhcp_universe)) { | |
5312 | switch(opt) { | |
bea17697 | 5313 | case DHO_DOMAIN_NAME: |
d15aa964 TM |
5314 | #ifdef ACCEPT_LIST_IN_DOMAIN_NAME |
5315 | return check_domain_name_list(ptr, len, 0); | |
5316 | #else | |
5317 | return check_domain_name(ptr, len, 0); | |
5318 | #endif | |
5319 | case DHO_HOST_NAME: | |
bea17697 SR |
5320 | case DHO_NIS_DOMAIN: |
5321 | case DHO_NETBIOS_SCOPE: | |
5322 | return check_domain_name(ptr, len, 0); | |
5323 | break; | |
5324 | case DHO_DOMAIN_SEARCH: | |
5325 | return check_domain_name_list(ptr, len, 0); | |
5326 | break; | |
5327 | case DHO_ROOT_PATH: | |
5328 | if (len == 0) | |
5329 | return(-1); | |
5330 | for (; (*ptr != 0) && (len-- > 0); ptr++) { | |
5331 | if(!(isalnum((unsigned char)*ptr) || | |
5332 | *ptr == '#' || *ptr == '%' || | |
5333 | *ptr == '+' || *ptr == '-' || | |
5334 | *ptr == '_' || *ptr == ':' || | |
5335 | *ptr == '.' || *ptr == ',' || | |
5336 | *ptr == '@' || *ptr == '~' || | |
5337 | *ptr == '\\' || *ptr == '/' || | |
5338 | *ptr == '[' || *ptr == ']' || | |
5339 | *ptr == '=' || *ptr == ' ')) | |
5340 | return(-1); | |
5341 | } | |
5342 | return(0); | |
5343 | break; | |
5344 | } | |
5345 | } | |
5346 | ||
5347 | #ifdef DHCPv6 | |
5348 | if (universe == &dhcpv6_universe) { | |
5349 | switch(opt) { | |
5350 | case D6O_SIP_SERVERS_DNS: | |
5351 | case D6O_DOMAIN_SEARCH: | |
5352 | case D6O_NIS_DOMAIN_NAME: | |
5353 | case D6O_NISP_DOMAIN_NAME: | |
5354 | return check_domain_name_list(ptr, len, 0); | |
5355 | break; | |
5356 | } | |
5357 | } | |
5358 | #endif | |
5359 | ||
5360 | return(0); | |
5361 | } | |
bea17697 | 5362 | |
5d082abd TM |
5363 | static void |
5364 | add_reject(struct packet *packet) { | |
5365 | struct iaddrmatchlist *list; | |
cca6a648 | 5366 | |
5d082abd TM |
5367 | list = dmalloc(sizeof(struct iaddrmatchlist), MDL); |
5368 | if (!list) | |
5369 | log_fatal ("no memory for reject list!"); | |
bea17697 | 5370 | |
5d082abd TM |
5371 | /* |
5372 | * client_addr is misleading - it is set to source address in common | |
5373 | * code. | |
5374 | */ | |
5375 | list->match.addr = packet->client_addr; | |
5376 | /* Set mask to indicate host address. */ | |
5377 | list->match.mask.len = list->match.addr.len; | |
5378 | memset(list->match.mask.iabuf, 0xff, sizeof(list->match.mask.iabuf)); | |
5379 | ||
5380 | /* Append to reject list for the source interface. */ | |
5381 | list->next = packet->interface->client->config->reject_list; | |
5382 | packet->interface->client->config->reject_list = list; | |
5383 | ||
5384 | /* | |
5385 | * We should inform user that we won't be accepting this server | |
5386 | * anymore. | |
5387 | */ | |
5388 | log_info("Server added to list of rejected servers."); | |
5389 | } | |
d7d9c0c7 | 5390 | |
cca6a648 | 5391 | /* Wrapper function around common ddns_cb_free function that ensures |
5392 | * we set the client_state pointer to the control block to NULL. */ | |
5393 | static void | |
5394 | dhclient_ddns_cb_free(dhcp_ddns_cb_t *ddns_cb, char* file, int line) { | |
5395 | if (ddns_cb) { | |
5396 | struct client_state *client = (struct client_state *)ddns_cb->lease; | |
5397 | if (client != NULL) { | |
5398 | client->ddns_cb = NULL; | |
5399 | } | |
5400 | ||
5401 | ddns_cb_free(ddns_cb, file, line); | |
5402 | } | |
5403 | } | |
785c1a51 FD |
5404 | |
5405 | #if defined(DHCPv6) && defined(DHCP4o6) | |
5406 | /* | |
5407 | * \brief Omapi I/O handler | |
5408 | * | |
5409 | * The inter-process communication receive handler. | |
5410 | * | |
5411 | * On the DHCPv6 side, the message is either a POLL (which is answered | |
5412 | * by a START or a STOP) or a DHCPv4-QUERY (which is forwarded to | |
5413 | * DHCPv4 over DHCPv6 servers by forw_dhcpv4_query()). | |
5414 | * | |
5415 | * On the DHCPv4 side, the message is either a START, a STOP | |
5416 | * (both for the DHCP4 over DHCPv6 state machine) or a DHCPv4-RESPONSE | |
5417 | * (which is processed by recv_dhcpv4_response()). | |
5418 | * | |
5419 | * \param h the OMAPI object | |
5420 | * \return a result for I/O success or error (used by the I/O subsystem) | |
5421 | */ | |
5422 | isc_result_t dhcpv4o6_handler(omapi_object_t *h) { | |
5423 | char buf[65536]; | |
5424 | char start_msg[5] = { 'S', 'T', 'A', 'R', 'T' }; | |
5425 | char stop_msg[4] = { 'S', 'T', 'O', 'P' }; | |
5426 | char poll_msg[4] = { 'P', 'O', 'L', 'L' }; | |
5427 | struct data_string raw; | |
5428 | int cc; | |
5429 | ||
5430 | if (h->type != dhcp4o6_type) | |
5431 | return DHCP_R_INVALIDARG; | |
5432 | ||
5433 | cc = recv(dhcp4o6_fd, buf, sizeof(buf), 0); | |
5434 | if (cc <= 0) | |
5435 | return ISC_R_UNEXPECTED; | |
5436 | ||
5437 | if (local_family == AF_INET6) { | |
5438 | if ((cc == 4) && | |
5439 | (memcmp(buf, poll_msg, sizeof(poll_msg)) == 0)) { | |
5440 | log_info("RCV: POLL"); | |
5441 | if (dhcp4o6_state < 0) | |
5442 | cc = send(dhcp4o6_fd, stop_msg, | |
5443 | sizeof(stop_msg), 0); | |
5444 | else | |
5445 | cc = send(dhcp4o6_fd, start_msg, | |
5446 | sizeof(start_msg), 0); | |
5447 | if (cc < 0) { | |
5448 | log_error("dhcpv4o6_handler: send(): %m"); | |
5449 | return ISC_R_IOERROR; | |
5450 | } | |
5451 | } else { | |
5452 | if (cc < DHCP_FIXED_NON_UDP + 8) | |
5453 | return ISC_R_UNEXPECTED; | |
5454 | memset(&raw, 0, sizeof(raw)); | |
5455 | if (!buffer_allocate(&raw.buffer, cc, MDL)) { | |
5456 | log_error("dhcpv4o6_handler: " | |
5457 | "no memory buffer."); | |
5458 | return ISC_R_NOMEMORY; | |
5459 | } | |
5460 | raw.data = raw.buffer->data; | |
5461 | raw.len = cc; | |
5462 | memcpy(raw.buffer->data, buf, cc); | |
5463 | ||
5464 | forw_dhcpv4_query(&raw); | |
5465 | ||
5466 | data_string_forget(&raw, MDL); | |
5467 | } | |
5468 | } else { | |
5469 | if ((cc == 4) && | |
5470 | (memcmp(buf, stop_msg, sizeof(stop_msg)) == 0)) { | |
5471 | log_info("RCV: STOP"); | |
5472 | if (dhcp4o6_state > 0) { | |
5473 | dhcp4o6_state = 0; | |
5474 | dhcp4o6_poll(NULL); | |
5475 | } | |
5476 | } else if ((cc == 5) && | |
5477 | (memcmp(buf, start_msg, sizeof(start_msg)) == 0)) { | |
5478 | log_info("RCV: START"); | |
5479 | if (dhcp4o6_state == 0) | |
5480 | cancel_timeout(dhcp4o6_poll, NULL); | |
5481 | dhcp4o6_state = 1; | |
5482 | dhcp4o6_resume(); | |
5483 | } else { | |
5484 | if (cc < DHCP_FIXED_NON_UDP + 16) | |
5485 | return ISC_R_UNEXPECTED; | |
5486 | memset(&raw, 0, sizeof(raw)); | |
5487 | if (!buffer_allocate(&raw.buffer, cc, MDL)) { | |
5488 | log_error("dhcpv4o6_handler: " | |
5489 | "no memory buffer."); | |
5490 | return ISC_R_NOMEMORY; | |
5491 | } | |
5492 | raw.data = raw.buffer->data; | |
5493 | raw.len = cc; | |
5494 | memcpy(raw.buffer->data, buf, cc); | |
5495 | ||
5496 | recv_dhcpv4_response(&raw); | |
5497 | ||
5498 | data_string_forget(&raw, MDL); | |
5499 | } | |
5500 | } | |
5501 | ||
5502 | return ISC_R_SUCCESS; | |
5503 | } | |
5504 | ||
5505 | /* | |
5506 | * \brief Poll the DHCPv6 client | |
5507 | * (DHCPv4 client function) | |
5508 | * | |
5509 | * A POLL message is sent to the DHCPv6 client periodically to check | |
5510 | * if the DHCPv6 is ready (i.e., has a valid DHCPv4-over-DHCPv6 server | |
5511 | * address option). | |
5512 | */ | |
5513 | static void dhcp4o6_poll(void *dummy) { | |
5514 | char msg[4] = { 'P', 'O', 'L', 'L' }; | |
5515 | struct timeval tv; | |
5516 | int cc; | |
5517 | ||
5518 | IGNORE_UNUSED(dummy); | |
5519 | ||
5520 | if (dhcp4o6_state < 0) | |
5521 | dhcp4o6_state = 0; | |
5522 | ||
5523 | log_info("POLL"); | |
5524 | ||
5525 | cc = send(dhcp4o6_fd, msg, sizeof(msg), 0); | |
5526 | if (cc < 0) | |
5527 | log_error("dhcp4o6_poll: send(): %m"); | |
5528 | ||
5529 | tv.tv_sec = cur_time + 60; | |
5530 | tv.tv_usec = random() % 1000000; | |
5531 | ||
5532 | add_timeout(&tv, dhcp4o6_poll, NULL, 0, 0); | |
5533 | } | |
5534 | ||
5535 | /* | |
5536 | * \brief Resume pending operations | |
5537 | * (DHCPv4 client function) | |
5538 | * | |
5539 | * A START message was received from the DHCPv6 client so pending | |
5540 | * operations (RELEASE or REBOOT) must be resumed. | |
5541 | */ | |
5542 | static void dhcp4o6_resume() { | |
5543 | struct interface_info *ip; | |
5544 | struct client_state *client; | |
5545 | ||
5546 | for (ip = interfaces; ip != NULL; ip = ip->next) { | |
5547 | for (client = ip->client; client != NULL; | |
5548 | client = client->next) { | |
5549 | if (client->pending == P_RELEASE) | |
5550 | do_release(client); | |
5551 | else if (client->pending == P_REBOOT) | |
5552 | state_reboot(client); | |
5553 | } | |
5554 | } | |
5555 | } | |
5556 | ||
5557 | /* | |
5558 | * \brief Send a START to the DHCPv4 client | |
5559 | * (DHCPv6 client function) | |
5560 | * | |
5561 | * First check if there is a valid DHCPv4-over-DHCPv6 server address option, | |
5562 | * and when found go UP and on a transition from another state send | |
5563 | * a START message to the DHCPv4 client. | |
5564 | */ | |
5565 | void dhcp4o6_start() { | |
5566 | struct interface_info *ip; | |
5567 | struct client_state *client; | |
5568 | struct dhc6_lease *lease; | |
5569 | struct option_cache *oc; | |
5570 | struct data_string addrs; | |
5571 | char msg[5] = { 'S', 'T', 'A', 'R', 'T' }; | |
5572 | int cc; | |
5573 | ||
5574 | memset(&addrs, 0, sizeof(addrs)); | |
5575 | for (ip = interfaces; ip != NULL; ip = ip->next) { | |
5576 | for (client = ip->client; client != NULL; | |
5577 | client = client->next) { | |
5578 | if ((client->state != S_BOUND) && | |
5579 | (client->state != S_RENEWING) && | |
5580 | (client->state != S_REBINDING)) | |
5581 | continue; | |
5582 | lease = client->active_lease; | |
5583 | if ((lease == NULL) || lease->released) | |
5584 | continue; | |
5585 | oc = lookup_option(&dhcpv6_universe, | |
5586 | lease->options, | |
5587 | D6O_DHCP4_O_DHCP6_SERVER); | |
5588 | if ((oc == NULL) || | |
5589 | !evaluate_option_cache(&addrs, NULL, NULL, NULL, | |
5590 | lease->options, NULL, | |
5591 | &global_scope, oc, MDL)) | |
5592 | continue; | |
5593 | if ((addrs.len % 16) != 0) { | |
5594 | data_string_forget(&addrs, MDL); | |
5595 | continue; | |
5596 | } | |
5597 | data_string_forget(&addrs, MDL); | |
5598 | goto found; | |
5599 | } | |
5600 | } | |
5601 | log_info("dhcp4o6_start: failed"); | |
5602 | dhcp4o6_stop(); | |
5603 | return; | |
5604 | ||
5605 | found: | |
5606 | if (dhcp4o6_state == 1) | |
5607 | return; | |
5608 | log_info("dhcp4o6_start: go to UP"); | |
5609 | dhcp4o6_state = 1; | |
5610 | ||
5611 | cc = send(dhcp4o6_fd, msg, sizeof(msg), 0); | |
5612 | if (cc < 0) | |
5613 | log_info("dhcp4o6_start: send(): %m"); | |
5614 | } | |
5615 | ||
5616 | /* | |
5617 | * Send a STOP to the DHCPv4 client | |
5618 | * (DHCPv6 client function) | |
5619 | * | |
5620 | * Go DOWN and on a transition from another state send a STOP message | |
5621 | * to the DHCPv4 client. | |
5622 | */ | |
5623 | static void dhcp4o6_stop() { | |
5624 | char msg[4] = { 'S', 'T', 'O', 'P' }; | |
5625 | int cc; | |
5626 | ||
5627 | if (dhcp4o6_state == -1) | |
5628 | return; | |
5629 | ||
5630 | log_info("dhcp4o6_stop: go to DOWN"); | |
5631 | dhcp4o6_state = -1; | |
5632 | ||
5633 | cc = send(dhcp4o6_fd, msg, sizeof(msg), 0); | |
5634 | if (cc < 0) | |
5635 | log_error("dhcp4o6_stop: send(): %m"); | |
5636 | } | |
5637 | #endif /* DHCPv6 && DHCP4o6 */ |