]>
Commit | Line | Data |
---|---|---|
469cf3a4 | 1 | /* dhclient.c |
95821729 | 2 | |
9bdb9271 | 3 | DHCP Client. */ |
95821729 TL |
4 | |
5 | /* | |
66be0ad1 | 6 | * Copyright (c) 2004-2010 by Internet Systems Consortium, Inc. ("ISC") |
98311e4b | 7 | * Copyright (c) 1995-2003 by Internet Software Consortium |
95821729 | 8 | * |
98311e4b DH |
9 | * Permission to use, copy, modify, and distribute this software for any |
10 | * purpose with or without fee is hereby granted, provided that the above | |
11 | * copyright notice and this permission notice appear in all copies. | |
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" |
fe5b0fdd DH |
34 | #include <syslog.h> |
35 | #include <signal.h> | |
36 | #include <errno.h> | |
be62cf06 | 37 | #include <sys/time.h> |
fe5b0fdd | 38 | #include <sys/wait.h> |
e847f983 | 39 | #include <limits.h> |
98bf1607 | 40 | #include <dns/result.h> |
e581d615 | 41 | |
4a0d788a TL |
42 | TIME default_lease_time = 43200; /* 12 hours... */ |
43 | TIME max_lease_time = 86400; /* 24 hours... */ | |
44 | ||
b1b7b521 | 45 | const char *path_dhclient_conf = _PATH_DHCLIENT_CONF; |
98bd7ca0 DH |
46 | const char *path_dhclient_db = NULL; |
47 | const char *path_dhclient_pid = NULL; | |
420d8b3f | 48 | static char path_dhclient_script_array[] = _PATH_DHCLIENT_SCRIPT; |
c08637bb | 49 | char *path_dhclient_script = path_dhclient_script_array; |
cc26de46 | 50 | |
36f5cb7c TL |
51 | int dhcp_max_agent_option_packet_length = 0; |
52 | ||
b8cf055d TL |
53 | int interfaces_requested = 0; |
54 | ||
cc26de46 TL |
55 | struct iaddr iaddr_broadcast = { 4, { 255, 255, 255, 255 } }; |
56 | struct iaddr iaddr_any = { 4, { 0, 0, 0, 0 } }; | |
48d68880 | 57 | struct in_addr inaddr_any; |
cc26de46 | 58 | struct sockaddr_in sockaddr_broadcast; |
11373fb6 | 59 | struct in_addr giaddr; |
98bd7ca0 | 60 | struct data_string default_duid; |
a41d7a25 | 61 | int duid_type = 0; |
469cf3a4 | 62 | |
cc26de46 TL |
63 | /* ASSERT_STATE() does nothing now; it used to be |
64 | assert (state_is == state_shouldbe). */ | |
65 | #define ASSERT_STATE(state_is, state_shouldbe) {} | |
469cf3a4 | 66 | |
ae566556 SR |
67 | static const char copyright[] = "Copyright 2004-2009 Internet Systems Consortium."; |
68 | static const char arr [] = "All rights reserved."; | |
69 | static const char message [] = "Internet Systems Consortium DHCP Client"; | |
2c85ac9b | 70 | static const char url [] = "For info, please visit https://www.isc.org/software/dhcp/"; |
c1503c57 | 71 | |
420d8b3f FD |
72 | u_int16_t local_port = 0; |
73 | u_int16_t remote_port = 0; | |
74 | int no_daemon = 0; | |
75 | struct string_list *client_env = NULL; | |
76 | int client_env_count = 0; | |
77 | int onetry = 0; | |
78 | int quiet = 1; | |
79 | int nowait = 0; | |
80 | int stateless = 0; | |
81 | int wanted_ia_na = -1; /* the absolute value is the real one. */ | |
82 | int wanted_ia_ta = 0; | |
83 | int wanted_ia_pd = 0; | |
98bd7ca0 | 84 | char *mockup_relay = NULL; |
c1503c57 | 85 | |
3dbe2246 FD |
86 | void run_stateless(int exit_mode); |
87 | ||
420d8b3f | 88 | static void usage(void); |
95821729 | 89 | |
98bd7ca0 DH |
90 | static isc_result_t write_duid(struct data_string *duid); |
91 | ||
bea17697 SR |
92 | static int check_domain_name(const char *ptr, size_t len, int dots); |
93 | static int check_domain_name_list(const char *ptr, size_t len, int dots); | |
94 | static int check_option_values(struct universe *universe, unsigned int opt, | |
95 | const char *ptr, size_t len); | |
96 | ||
3dbe2246 | 97 | int |
98bd7ca0 | 98 | main(int argc, char **argv) { |
185d16f9 | 99 | int fd; |
c1503c57 | 100 | int i; |
cc26de46 | 101 | struct interface_info *ip; |
02d9e453 | 102 | struct client_state *client; |
b1b7b521 | 103 | unsigned seed; |
420d8b3f | 104 | char *server = NULL; |
628beb0e | 105 | isc_result_t status; |
3dbe2246 FD |
106 | int exit_mode = 0; |
107 | int release_mode = 0; | |
be62cf06 | 108 | struct timeval tv; |
347de8bd TL |
109 | omapi_object_t *listener; |
110 | isc_result_t result; | |
134ceef8 | 111 | int persist = 0; |
cfa7212d TL |
112 | int no_dhclient_conf = 0; |
113 | int no_dhclient_db = 0; | |
114 | int no_dhclient_pid = 0; | |
c08637bb | 115 | int no_dhclient_script = 0; |
c998be87 | 116 | #ifdef DHCPv6 |
98bd7ca0 | 117 | int local_family_set = 0; |
c998be87 | 118 | #endif /* DHCPv6 */ |
cfa7212d | 119 | char *s; |
6c6d5928 | 120 | |
98bd7ca0 DH |
121 | /* Initialize client globals. */ |
122 | memset(&default_duid, 0, sizeof(default_duid)); | |
123 | ||
3dbe2246 FD |
124 | /* Make sure that file descriptors 0 (stdin), 1, (stdout), and |
125 | 2 (stderr) are open. To do this, we assume that when we | |
126 | open a file the lowest available file descriptor is used. */ | |
127 | fd = open("/dev/null", O_RDWR); | |
128 | if (fd == 0) | |
129 | fd = open("/dev/null", O_RDWR); | |
130 | if (fd == 1) | |
131 | fd = open("/dev/null", O_RDWR); | |
132 | if (fd == 2) | |
133 | log_perror = 0; /* No sense logging to /dev/null. */ | |
134 | else if (fd != -1) | |
135 | close(fd); | |
ee8a3653 | 136 | |
420d8b3f | 137 | openlog("dhclient", LOG_NDELAY, LOG_DAEMON); |
95821729 | 138 | |
420d8b3f FD |
139 | #if !(defined(DEBUG) || defined(__CYGWIN32__)) |
140 | setlogmask(LOG_UPTO(LOG_INFO)); | |
3dbe2246 | 141 | #endif |
c1503c57 | 142 | |
98bf1607 SR |
143 | /* Set up the isc and dns library managers */ |
144 | status = dhcp_context_create(); | |
145 | if (status != ISC_R_SUCCESS) | |
146 | log_fatal("Can't initialize context: %s", | |
147 | isc_result_totext(status)); | |
148 | ||
67569fa6 | 149 | /* Set up the OMAPI. */ |
420d8b3f | 150 | status = omapi_init(); |
67569fa6 | 151 | if (status != ISC_R_SUCCESS) |
420d8b3f FD |
152 | log_fatal("Can't initialize OMAPI: %s", |
153 | isc_result_totext(status)); | |
67569fa6 TL |
154 | |
155 | /* Set up the OMAPI wrappers for various server database internal | |
156 | objects. */ | |
420d8b3f | 157 | dhcp_common_objects_setup(); |
67569fa6 TL |
158 | |
159 | dhcp_interface_discovery_hook = dhclient_interface_discovery_hook; | |
160 | dhcp_interface_shutdown_hook = dhclient_interface_shutdown_hook; | |
57710b89 | 161 | dhcp_interface_startup_hook = dhclient_interface_startup_hook; |
67569fa6 | 162 | |
c1503c57 | 163 | for (i = 1; i < argc; i++) { |
3dbe2246 | 164 | if (!strcmp(argv[i], "-r")) { |
182b187e EH |
165 | release_mode = 1; |
166 | no_daemon = 1; | |
167 | #ifdef DHCPv6 | |
168 | } else if (!strcmp(argv[i], "-4")) { | |
98bd7ca0 DH |
169 | if (local_family_set && local_family != AF_INET) |
170 | log_fatal("Client can only do v4 or v6, not " | |
171 | "both."); | |
172 | local_family_set = 1; | |
173 | local_family = AF_INET; | |
174 | } else if (!strcmp(argv[i], "-6")) { | |
175 | if (local_family_set && local_family != AF_INET6) | |
176 | log_fatal("Client can only do v4 or v6, not " | |
177 | "both."); | |
178 | local_family_set = 1; | |
179 | local_family = AF_INET6; | |
182b187e | 180 | #endif /* DHCPv6 */ |
420d8b3f | 181 | } else if (!strcmp(argv[i], "-x")) { /* eXit, no release */ |
3dbe2246 FD |
182 | release_mode = 0; |
183 | no_daemon = 0; | |
184 | exit_mode = 1; | |
420d8b3f | 185 | } else if (!strcmp(argv[i], "-p")) { |
c1503c57 | 186 | if (++i == argc) |
420d8b3f | 187 | usage(); |
59112e84 | 188 | local_port = validate_port(argv[i]); |
420d8b3f FD |
189 | log_debug("binding to user-specified port %d", |
190 | ntohs(local_port)); | |
191 | } else if (!strcmp(argv[i], "-d")) { | |
b00d3884 | 192 | no_daemon = 1; |
8ea19a71 | 193 | quiet = 0; |
420d8b3f | 194 | } else if (!strcmp(argv[i], "-pf")) { |
3dbe2246 | 195 | if (++i == argc) |
420d8b3f FD |
196 | usage(); |
197 | path_dhclient_pid = argv[i]; | |
cfa7212d | 198 | no_dhclient_pid = 1; |
420d8b3f | 199 | } else if (!strcmp(argv[i], "-cf")) { |
3dbe2246 | 200 | if (++i == argc) |
420d8b3f FD |
201 | usage(); |
202 | path_dhclient_conf = argv[i]; | |
cfa7212d | 203 | no_dhclient_conf = 1; |
420d8b3f | 204 | } else if (!strcmp(argv[i], "-lf")) { |
3dbe2246 | 205 | if (++i == argc) |
420d8b3f FD |
206 | usage(); |
207 | path_dhclient_db = argv[i]; | |
cfa7212d | 208 | no_dhclient_db = 1; |
420d8b3f | 209 | } else if (!strcmp(argv[i], "-sf")) { |
c08637bb | 210 | if (++i == argc) |
420d8b3f FD |
211 | usage(); |
212 | path_dhclient_script = argv[i]; | |
c08637bb | 213 | no_dhclient_script = 1; |
420d8b3f | 214 | } else if (!strcmp(argv[i], "-1")) { |
c08637bb | 215 | onetry = 1; |
420d8b3f | 216 | } else if (!strcmp(argv[i], "-q")) { |
62d0cb47 | 217 | quiet = 1; |
420d8b3f | 218 | } else if (!strcmp(argv[i], "-s")) { |
3020a2c1 | 219 | if (++i == argc) |
420d8b3f FD |
220 | usage(); |
221 | server = argv[i]; | |
222 | } else if (!strcmp(argv[i], "-g")) { | |
11373fb6 | 223 | if (++i == argc) |
420d8b3f FD |
224 | usage(); |
225 | mockup_relay = argv[i]; | |
226 | } else if (!strcmp(argv[i], "-nw")) { | |
98311e4b | 227 | nowait = 1; |
420d8b3f | 228 | } else if (!strcmp(argv[i], "-n")) { |
347de8bd | 229 | /* do not start up any interfaces */ |
3dbe2246 | 230 | interfaces_requested = -1; |
420d8b3f | 231 | } else if (!strcmp(argv[i], "-w")) { |
134ceef8 TL |
232 | /* do not exit if there are no broadcast interfaces. */ |
233 | persist = 1; | |
420d8b3f | 234 | } else if (!strcmp(argv[i], "-e")) { |
b1423aed TL |
235 | struct string_list *tmp; |
236 | if (++i == argc) | |
420d8b3f FD |
237 | usage(); |
238 | tmp = dmalloc(strlen(argv[i]) + sizeof *tmp, MDL); | |
b1423aed | 239 | if (!tmp) |
420d8b3f FD |
240 | log_fatal("No memory for %s", argv[i]); |
241 | strcpy(tmp->string, argv[i]); | |
242 | tmp->next = client_env; | |
b1423aed TL |
243 | client_env = tmp; |
244 | client_env_count++; | |
420d8b3f | 245 | #ifdef DHCPv6 |
3dbe2246 FD |
246 | } else if (!strcmp(argv[i], "-S")) { |
247 | if (local_family_set && (local_family == AF_INET)) { | |
420d8b3f | 248 | usage(); |
3dbe2246 FD |
249 | } |
250 | local_family_set = 1; | |
251 | local_family = AF_INET6; | |
420d8b3f | 252 | wanted_ia_na = 0; |
3dbe2246 | 253 | stateless = 1; |
420d8b3f FD |
254 | } else if (!strcmp(argv[i], "-N")) { |
255 | if (local_family_set && (local_family == AF_INET)) { | |
256 | usage(); | |
257 | } | |
258 | local_family_set = 1; | |
259 | local_family = AF_INET6; | |
260 | if (wanted_ia_na < 0) { | |
261 | wanted_ia_na = 0; | |
262 | } | |
263 | wanted_ia_na++; | |
264 | } else if (!strcmp(argv[i], "-T")) { | |
265 | if (local_family_set && (local_family == AF_INET)) { | |
266 | usage(); | |
267 | } | |
268 | local_family_set = 1; | |
269 | local_family = AF_INET6; | |
270 | if (wanted_ia_na < 0) { | |
271 | wanted_ia_na = 0; | |
272 | } | |
273 | wanted_ia_ta++; | |
274 | } else if (!strcmp(argv[i], "-P")) { | |
275 | if (local_family_set && (local_family == AF_INET)) { | |
276 | usage(); | |
277 | } | |
278 | local_family_set = 1; | |
279 | local_family = AF_INET6; | |
280 | if (wanted_ia_na < 0) { | |
281 | wanted_ia_na = 0; | |
282 | } | |
283 | wanted_ia_pd++; | |
a41d7a25 PS |
284 | } else if (!strcmp(argv[i], "-D")) { |
285 | if (local_family_set && (local_family == AF_INET)) { | |
286 | usage(); | |
287 | } | |
288 | local_family_set = 1; | |
289 | local_family = AF_INET6; | |
290 | if (++i == argc) | |
291 | usage(); | |
292 | if (!strcasecmp(argv[i], "LL")) { | |
293 | duid_type = DUID_LL; | |
294 | } else if (!strcasecmp(argv[i], "LLT")) { | |
295 | duid_type = DUID_LLT; | |
296 | } else { | |
297 | usage(); | |
298 | } | |
420d8b3f | 299 | #endif /* DHCPv6 */ |
8ea19a71 DH |
300 | } else if (!strcmp(argv[i], "-v")) { |
301 | quiet = 0; | |
420d8b3f FD |
302 | } else if (!strcmp(argv[i], "--version")) { |
303 | log_info("isc-dhclient-%s", PACKAGE_VERSION); | |
304 | exit(0); | |
305 | } else if (argv[i][0] == '-') { | |
306 | usage(); | |
3dbe2246 | 307 | } else if (interfaces_requested < 0) { |
420d8b3f | 308 | usage(); |
98311e4b | 309 | } else { |
420d8b3f FD |
310 | struct interface_info *tmp = NULL; |
311 | ||
312 | status = interface_allocate(&tmp, MDL); | |
3dbe2246 | 313 | if (status != ISC_R_SUCCESS) |
420d8b3f FD |
314 | log_fatal("Can't record interface %s:%s", |
315 | argv[i], isc_result_totext(status)); | |
88cd8aca DH |
316 | if (strlen(argv[i]) >= sizeof(tmp->name)) |
317 | log_fatal("%s: interface name too long (is %ld)", | |
420d8b3f | 318 | argv[i], (long)strlen(argv[i])); |
88cd8aca | 319 | strcpy(tmp->name, argv[i]); |
20916cae | 320 | if (interfaces) { |
420d8b3f FD |
321 | interface_reference(&tmp->next, |
322 | interfaces, MDL); | |
323 | interface_dereference(&interfaces, MDL); | |
20916cae | 324 | } |
420d8b3f FD |
325 | interface_reference(&interfaces, tmp, MDL); |
326 | tmp->flags = INTERFACE_REQUESTED; | |
3dbe2246 FD |
327 | interfaces_requested++; |
328 | } | |
c1503c57 | 329 | } |
62d0cb47 | 330 | |
420d8b3f FD |
331 | if (wanted_ia_na < 0) { |
332 | wanted_ia_na = 1; | |
333 | } | |
334 | ||
335 | /* Support only one (requested) interface for Prefix Delegation. */ | |
336 | if (wanted_ia_pd && (interfaces_requested != 1)) { | |
337 | usage(); | |
338 | } | |
339 | ||
340 | if (!no_dhclient_conf && (s = getenv("PATH_DHCLIENT_CONF"))) { | |
cfa7212d TL |
341 | path_dhclient_conf = s; |
342 | } | |
420d8b3f | 343 | if (!no_dhclient_db && (s = getenv("PATH_DHCLIENT_DB"))) { |
cfa7212d TL |
344 | path_dhclient_db = s; |
345 | } | |
420d8b3f | 346 | if (!no_dhclient_pid && (s = getenv("PATH_DHCLIENT_PID"))) { |
cfa7212d TL |
347 | path_dhclient_pid = s; |
348 | } | |
420d8b3f | 349 | if (!no_dhclient_script && (s = getenv("PATH_DHCLIENT_SCRIPT"))) { |
c08637bb TL |
350 | path_dhclient_script = s; |
351 | } | |
cfa7212d | 352 | |
98bd7ca0 DH |
353 | /* Set up the initial dhcp option universe. */ |
354 | initialize_common_option_spaces(); | |
355 | ||
356 | /* Assign v4 or v6 specific running parameters. */ | |
357 | if (local_family == AF_INET) | |
358 | dhcpv4_client_assignments(); | |
fe5b0fdd | 359 | #ifdef DHCPv6 |
98bd7ca0 DH |
360 | else if (local_family == AF_INET6) |
361 | dhcpv6_client_assignments(); | |
fe5b0fdd | 362 | #endif /* DHCPv6 */ |
98bd7ca0 DH |
363 | else |
364 | log_fatal("Impossible condition at %s:%d.", MDL); | |
365 | ||
a546f2a7 EH |
366 | /* |
367 | * convert relative path names to absolute, for files that need | |
368 | * to be reopened after chdir() has been called | |
369 | */ | |
370 | if (path_dhclient_db[0] != '/') { | |
371 | char *path = dmalloc(PATH_MAX, MDL); | |
372 | if (path == NULL) | |
373 | log_fatal("No memory for filename\n"); | |
420d8b3f | 374 | path_dhclient_db = realpath(path_dhclient_db, path); |
a546f2a7 EH |
375 | if (path_dhclient_db == NULL) |
376 | log_fatal("%s: %s", path, strerror(errno)); | |
377 | } | |
3dbe2246 | 378 | |
a546f2a7 EH |
379 | if (path_dhclient_script[0] != '/') { |
380 | char *path = dmalloc(PATH_MAX, MDL); | |
381 | if (path == NULL) | |
382 | log_fatal("No memory for filename\n"); | |
420d8b3f | 383 | path_dhclient_script = realpath(path_dhclient_script, path); |
a546f2a7 EH |
384 | if (path_dhclient_script == NULL) |
385 | log_fatal("%s: %s", path, strerror(errno)); | |
386 | } | |
3dbe2246 | 387 | |
a546f2a7 | 388 | /* first kill off any currently running client */ |
af5fa176 | 389 | if (release_mode || exit_mode) { |
98311e4b DH |
390 | FILE *pidfd; |
391 | pid_t oldpid; | |
392 | long temp; | |
393 | int e; | |
394 | ||
395 | oldpid = 0; | |
396 | if ((pidfd = fopen(path_dhclient_pid, "r")) != NULL) { | |
397 | e = fscanf(pidfd, "%ld\n", &temp); | |
398 | oldpid = (pid_t)temp; | |
399 | ||
400 | if (e != 0 && e != EOF) { | |
182b187e EH |
401 | if (oldpid) |
402 | kill(oldpid, SIGTERM); | |
98311e4b DH |
403 | } |
404 | fclose(pidfd); | |
405 | } | |
347de8bd TL |
406 | } |
407 | ||
62d0cb47 | 408 | if (!quiet) { |
420d8b3f FD |
409 | log_info("%s %s", message, PACKAGE_VERSION); |
410 | log_info(copyright); | |
411 | log_info(arr); | |
412 | log_info(url); | |
413 | log_info("%s", ""); | |
8ea19a71 | 414 | } else { |
78a33b82 | 415 | log_perror = 0; |
8ea19a71 DH |
416 | quiet_interface_discovery = 1; |
417 | } | |
62d0cb47 | 418 | |
11373fb6 TL |
419 | /* If we're given a relay agent address to insert, for testing |
420 | purposes, figure out what it is. */ | |
98bd7ca0 | 421 | if (mockup_relay) { |
420d8b3f | 422 | if (!inet_aton(mockup_relay, &giaddr)) { |
11373fb6 | 423 | struct hostent *he; |
420d8b3f | 424 | he = gethostbyname(mockup_relay); |
11373fb6 | 425 | if (he) { |
420d8b3f FD |
426 | memcpy(&giaddr, he->h_addr_list[0], |
427 | sizeof giaddr); | |
11373fb6 | 428 | } else { |
420d8b3f | 429 | log_fatal("%s: no such host", mockup_relay); |
11373fb6 TL |
430 | } |
431 | } | |
432 | } | |
433 | ||
95821729 | 434 | /* Get the current time... */ |
be62cf06 | 435 | gettimeofday(&cur_tv, NULL); |
95821729 | 436 | |
b00d3884 | 437 | sockaddr_broadcast.sin_family = AF_INET; |
cc26de46 | 438 | sockaddr_broadcast.sin_port = remote_port; |
3020a2c1 | 439 | if (server) { |
420d8b3f | 440 | if (!inet_aton(server, &sockaddr_broadcast.sin_addr)) { |
3020a2c1 | 441 | struct hostent *he; |
420d8b3f | 442 | he = gethostbyname(server); |
3020a2c1 | 443 | if (he) { |
420d8b3f FD |
444 | memcpy(&sockaddr_broadcast.sin_addr, |
445 | he->h_addr_list[0], | |
446 | sizeof sockaddr_broadcast.sin_addr); | |
3020a2c1 TL |
447 | } else |
448 | sockaddr_broadcast.sin_addr.s_addr = | |
449 | INADDR_BROADCAST; | |
450 | } | |
451 | } else { | |
452 | sockaddr_broadcast.sin_addr.s_addr = INADDR_BROADCAST; | |
453 | } | |
11373fb6 | 454 | |
48d68880 | 455 | inaddr_any.s_addr = INADDR_ANY; |
469cf3a4 | 456 | |
3dbe2246 FD |
457 | /* Stateless special case. */ |
458 | if (stateless) { | |
420d8b3f FD |
459 | if (release_mode || (wanted_ia_na > 0) || |
460 | wanted_ia_ta || wanted_ia_pd || | |
461 | (interfaces_requested != 1)) { | |
462 | usage(); | |
3dbe2246 | 463 | } |
420d8b3f | 464 | run_stateless(exit_mode); |
3dbe2246 FD |
465 | return 0; |
466 | } | |
467 | ||
cc26de46 | 468 | /* Discover all the network interfaces. */ |
420d8b3f | 469 | discover_interfaces(DISCOVER_UNCONFIGURED); |
469cf3a4 | 470 | |
cc26de46 | 471 | /* Parse the dhclient.conf file. */ |
420d8b3f | 472 | read_client_conf(); |
469cf3a4 | 473 | |
cc26de46 | 474 | /* Parse the lease database. */ |
420d8b3f | 475 | read_client_leases(); |
469cf3a4 | 476 | |
cc26de46 | 477 | /* Rewrite the lease database... */ |
420d8b3f | 478 | rewrite_client_leases(); |
469cf3a4 | 479 | |
ce0ec46d TL |
480 | /* XXX */ |
481 | /* config_counter(&snd_counter, &rcv_counter); */ | |
482 | ||
420d8b3f FD |
483 | /* |
484 | * If no broadcast interfaces were discovered, call the script | |
485 | * and tell it so. | |
486 | */ | |
cc26de46 | 487 | if (!interfaces) { |
420d8b3f FD |
488 | /* |
489 | * Call dhclient-script with the NBI flag, | |
490 | * in case somebody cares. | |
491 | */ | |
492 | script_init(NULL, "NBI", NULL); | |
493 | script_go(NULL); | |
494 | ||
495 | /* | |
496 | * If we haven't been asked to persist, waiting for new | |
497 | * interfaces, then just exit. | |
498 | */ | |
134ceef8 TL |
499 | if (!persist) { |
500 | /* Nothing more to do. */ | |
420d8b3f FD |
501 | log_info("No broadcast interfaces found - exiting."); |
502 | exit(0); | |
134ceef8 | 503 | } |
af5fa176 | 504 | } else if (!release_mode && !exit_mode) { |
cc26de46 | 505 | /* Call the script with the list of interfaces. */ |
420d8b3f FD |
506 | for (ip = interfaces; ip; ip = ip->next) { |
507 | /* | |
508 | * If interfaces were specified, don't configure | |
509 | * interfaces that weren't specified! | |
510 | */ | |
3dbe2246 | 511 | if ((interfaces_requested > 0) && |
420d8b3f FD |
512 | ((ip->flags & (INTERFACE_REQUESTED | |
513 | INTERFACE_AUTOMATIC)) != | |
62d0cb47 | 514 | INTERFACE_REQUESTED)) |
5c2f78b4 | 515 | continue; |
98bd7ca0 DH |
516 | |
517 | if (local_family == AF_INET6) { | |
518 | script_init(ip->client, "PREINIT6", NULL); | |
519 | } else { | |
520 | script_init(ip->client, "PREINIT", NULL); | |
521 | if (ip->client->alias != NULL) | |
522 | script_write_params(ip->client, | |
523 | "alias_", | |
524 | ip->client->alias); | |
525 | } | |
420d8b3f | 526 | script_go(ip->client); |
cc26de46 TL |
527 | } |
528 | } | |
469cf3a4 | 529 | |
cc26de46 TL |
530 | /* At this point, all the interfaces that the script thinks |
531 | are relevant should be running, so now we once again call | |
532 | discover_interfaces(), and this time ask it to actually set | |
533 | up the interfaces. */ | |
420d8b3f FD |
534 | discover_interfaces(interfaces_requested != 0 |
535 | ? DISCOVER_REQUESTED | |
536 | : DISCOVER_RUNNING); | |
cc26de46 | 537 | |
66f973e4 TL |
538 | /* Make up a seed for the random number generator from current |
539 | time plus the sum of the last four bytes of each | |
540 | interface's hardware address interpreted as an integer. | |
541 | Not much entropy, but we're booting, so we're not likely to | |
542 | find anything better. */ | |
02d9e453 | 543 | seed = 0; |
420d8b3f | 544 | for (ip = interfaces; ip; ip = ip->next) { |
66f973e4 | 545 | int junk; |
420d8b3f FD |
546 | memcpy(&junk, |
547 | &ip->hw_address.hbuf[ip->hw_address.hlen - | |
548 | sizeof seed], sizeof seed); | |
66f973e4 TL |
549 | seed += junk; |
550 | } | |
66be0ad1 | 551 | srandom(seed + cur_time + (unsigned)getpid()); |
66f973e4 | 552 | |
cc26de46 | 553 | /* Start a configuration state machine for each interface. */ |
fe5b0fdd | 554 | #ifdef DHCPv6 |
98bd7ca0 | 555 | if (local_family == AF_INET6) { |
98bd7ca0 DH |
556 | /* Establish a default DUID. This may be moved to the |
557 | * DHCPv4 area later. | |
558 | */ | |
559 | if (default_duid.len == 0) { | |
560 | if (default_duid.buffer != NULL) | |
561 | data_string_forget(&default_duid, MDL); | |
562 | ||
563 | form_duid(&default_duid, MDL); | |
564 | write_duid(&default_duid); | |
565 | } | |
566 | ||
567 | for (ip = interfaces ; ip != NULL ; ip = ip->next) { | |
568 | for (client = ip->client ; client != NULL ; | |
569 | client = client->next) { | |
3dbe2246 FD |
570 | if (release_mode) { |
571 | start_release6(client); | |
572 | continue; | |
573 | } else if (exit_mode) { | |
574 | unconfigure6(client, "STOP6"); | |
575 | continue; | |
576 | } | |
af5fa176 | 577 | |
98bd7ca0 DH |
578 | /* If we have a previous binding, Confirm |
579 | * that we can (or can't) still use it. | |
580 | */ | |
cabdb9b1 FD |
581 | if ((client->active_lease != NULL) && |
582 | !client->active_lease->released) | |
98bd7ca0 DH |
583 | start_confirm6(client); |
584 | else | |
585 | start_init6(client); | |
586 | } | |
587 | } | |
3dbe2246 | 588 | } else |
fe5b0fdd DH |
589 | #endif /* DHCPv6 */ |
590 | { | |
98bd7ca0 DH |
591 | for (ip = interfaces ; ip ; ip = ip->next) { |
592 | ip->flags |= INTERFACE_RUNNING; | |
593 | for (client = ip->client ; client ; | |
594 | client = client->next) { | |
3dbe2246 FD |
595 | if (exit_mode) |
596 | state_stop(client); | |
597 | else if (release_mode) | |
98bd7ca0 DH |
598 | do_release(client); |
599 | else { | |
600 | client->state = S_INIT; | |
601 | /* Set up a timeout to start the | |
602 | * initialization process. | |
603 | */ | |
be62cf06 FD |
604 | tv.tv_sec = cur_time + random() % 5; |
605 | tv.tv_usec = 0; | |
606 | add_timeout(&tv, state_reboot, | |
607 | client, 0, 0); | |
98bd7ca0 | 608 | } |
347de8bd | 609 | } |
02d9e453 | 610 | } |
cc26de46 | 611 | } |
469cf3a4 | 612 | |
87202683 | 613 | if (exit_mode) |
347de8bd | 614 | return 0; |
87202683 FD |
615 | if (release_mode) { |
616 | #ifndef DHCPv6 | |
617 | return 0; | |
618 | #else | |
619 | if (local_family == AF_INET6) { | |
620 | if (onetry) | |
621 | return 0; | |
622 | } else | |
623 | return 0; | |
624 | #endif /* DHCPv6 */ | |
625 | } | |
347de8bd TL |
626 | |
627 | /* Start up a listener for the object management API protocol. */ | |
40a59753 | 628 | if (top_level_config.omapi_port != -1) { |
420d8b3f FD |
629 | listener = NULL; |
630 | result = omapi_generic_new(&listener, MDL); | |
40a59753 | 631 | if (result != ISC_R_SUCCESS) |
420d8b3f FD |
632 | log_fatal("Can't allocate new generic object: %s\n", |
633 | isc_result_totext(result)); | |
634 | result = omapi_protocol_listen(listener, | |
635 | (unsigned) | |
636 | top_level_config.omapi_port, | |
637 | 1); | |
40a59753 | 638 | if (result != ISC_R_SUCCESS) |
420d8b3f FD |
639 | log_fatal("Can't start OMAPI protocol: %s", |
640 | isc_result_totext (result)); | |
40a59753 | 641 | } |
347de8bd | 642 | |
84c4adde TL |
643 | /* Set up the bootp packet handler... */ |
644 | bootp_packet_handler = do_packet; | |
fe5b0fdd | 645 | #ifdef DHCPv6 |
98bd7ca0 | 646 | dhcpv6_packet_handler = do_packet6; |
fe5b0fdd | 647 | #endif /* DHCPv6 */ |
84c4adde | 648 | |
420d8b3f FD |
649 | #if defined(DEBUG_MEMORY_LEAKAGE) || defined(DEBUG_MALLOC_POOL) || \ |
650 | defined(DEBUG_MEMORY_LEAKAGE_ON_EXIT) | |
1c44f6bd TL |
651 | dmalloc_cutoff_generation = dmalloc_generation; |
652 | dmalloc_longterm = dmalloc_outstanding; | |
653 | dmalloc_outstanding = 0; | |
654 | #endif | |
655 | ||
37c1f13f TL |
656 | /* If we're not supposed to wait before getting the address, |
657 | don't. */ | |
658 | if (nowait) | |
420d8b3f | 659 | go_daemon(); |
37c1f13f | 660 | |
b1423aed TL |
661 | /* If we're not going to daemonize, write the pid file |
662 | now. */ | |
37c1f13f | 663 | if (no_daemon || nowait) |
420d8b3f | 664 | write_client_pid_file(); |
b1423aed | 665 | |
cc26de46 | 666 | /* Start dispatching packets and timeouts... */ |
420d8b3f | 667 | dispatch(); |
84c4adde | 668 | |
cc26de46 TL |
669 | /*NOTREACHED*/ |
670 | return 0; | |
469cf3a4 TL |
671 | } |
672 | ||
420d8b3f | 673 | static void usage() |
c1503c57 | 674 | { |
420d8b3f FD |
675 | log_info("%s %s", message, PACKAGE_VERSION); |
676 | log_info(copyright); | |
677 | log_info(arr); | |
678 | log_info(url); | |
89c425dd | 679 | |
420d8b3f | 680 | log_error("Usage: dhclient %s %s", |
182b187e | 681 | #ifdef DHCPv6 |
a41d7a25 | 682 | "[-4|-6] [-SNTP1dvrx] [-nw] [-p <port>] [-D LL|LLT]", |
182b187e | 683 | #else /* DHCPv6 */ |
420d8b3f | 684 | "[-1dvrx] [-nw] [-p <port>]", |
182b187e | 685 | #endif /* DHCPv6 */ |
420d8b3f FD |
686 | "[-s server]"); |
687 | log_error(" [-cf config-file] [-lf lease-file]%s", | |
688 | "[-pf pid-file] [-e VAR=val]"); | |
689 | log_fatal(" [-sf script-file] [interface]"); | |
c1503c57 TL |
690 | } |
691 | ||
3dbe2246 FD |
692 | void run_stateless(int exit_mode) |
693 | { | |
420d8b3f | 694 | #ifdef DHCPv6 |
3dbe2246 FD |
695 | struct client_state *client; |
696 | omapi_object_t *listener; | |
697 | isc_result_t result; | |
698 | ||
699 | /* Discover the network interface. */ | |
700 | discover_interfaces(DISCOVER_REQUESTED); | |
701 | ||
702 | if (!interfaces) | |
703 | usage(); | |
704 | ||
705 | /* Parse the dhclient.conf file. */ | |
706 | read_client_conf(); | |
707 | ||
708 | /* Parse the lease database. */ | |
709 | read_client_leases(); | |
710 | ||
711 | /* Establish a default DUID. */ | |
712 | if (default_duid.len == 0) { | |
713 | if (default_duid.buffer != NULL) | |
714 | data_string_forget(&default_duid, MDL); | |
715 | ||
716 | form_duid(&default_duid, MDL); | |
717 | } | |
718 | ||
719 | /* Start a configuration state machine. */ | |
720 | for (client = interfaces->client ; | |
721 | client != NULL ; | |
722 | client = client->next) { | |
723 | if (exit_mode) { | |
724 | unconfigure6(client, "STOP6"); | |
725 | continue; | |
726 | } | |
727 | start_info_request6(client); | |
728 | } | |
729 | if (exit_mode) | |
730 | return; | |
731 | ||
732 | /* Start up a listener for the object management API protocol. */ | |
733 | if (top_level_config.omapi_port != -1) { | |
420d8b3f | 734 | listener = NULL; |
3dbe2246 FD |
735 | result = omapi_generic_new(&listener, MDL); |
736 | if (result != ISC_R_SUCCESS) | |
737 | log_fatal("Can't allocate new generic object: %s\n", | |
738 | isc_result_totext(result)); | |
739 | result = omapi_protocol_listen(listener, | |
740 | (unsigned) | |
741 | top_level_config.omapi_port, | |
742 | 1); | |
743 | if (result != ISC_R_SUCCESS) | |
744 | log_fatal("Can't start OMAPI protocol: %s", | |
745 | isc_result_totext(result)); | |
746 | } | |
747 | ||
748 | /* Set up the packet handler... */ | |
749 | dhcpv6_packet_handler = do_packet6; | |
750 | ||
420d8b3f FD |
751 | #if defined(DEBUG_MEMORY_LEAKAGE) || defined(DEBUG_MALLOC_POOL) || \ |
752 | defined(DEBUG_MEMORY_LEAKAGE_ON_EXIT) | |
3dbe2246 FD |
753 | dmalloc_cutoff_generation = dmalloc_generation; |
754 | dmalloc_longterm = dmalloc_outstanding; | |
755 | dmalloc_outstanding = 0; | |
756 | #endif | |
757 | ||
758 | /* If we're not supposed to wait before getting the address, | |
759 | don't. */ | |
760 | if (nowait) | |
761 | go_daemon(); | |
762 | ||
763 | /* If we're not going to daemonize, write the pid file | |
764 | now. */ | |
765 | if (no_daemon || nowait) | |
766 | write_client_pid_file(); | |
767 | ||
768 | /* Start dispatching packets and timeouts... */ | |
769 | dispatch(); | |
770 | ||
771 | /*NOTREACHED*/ | |
420d8b3f | 772 | #endif /* DHCPv6 */ |
3dbe2246 FD |
773 | return; |
774 | } | |
775 | ||
20916cae TL |
776 | isc_result_t find_class (struct class **c, |
777 | const char *s, const char *file, int line) | |
02a015fb | 778 | { |
20916cae | 779 | return 0; |
02a015fb TL |
780 | } |
781 | ||
da38df14 | 782 | int check_collection (packet, lease, collection) |
02a015fb | 783 | struct packet *packet; |
da38df14 | 784 | struct lease *lease; |
02a015fb TL |
785 | struct collection *collection; |
786 | { | |
787 | return 0; | |
788 | } | |
789 | ||
790 | void classify (packet, class) | |
791 | struct packet *packet; | |
792 | struct class *class; | |
793 | { | |
794 | } | |
795 | ||
73530742 TL |
796 | int unbill_class (lease, class) |
797 | struct lease *lease; | |
798 | struct class *class; | |
799 | { | |
800 | return 0; | |
801 | } | |
802 | ||
20916cae TL |
803 | int find_subnet (struct subnet **sp, |
804 | struct iaddr addr, const char *file, int line) | |
bfdb842e | 805 | { |
20916cae | 806 | return 0; |
bfdb842e TL |
807 | } |
808 | ||
469cf3a4 | 809 | /* Individual States: |
3dbe2246 | 810 | * |
469cf3a4 TL |
811 | * Each routine is called from the dhclient_state_machine() in one of |
812 | * these conditions: | |
813 | * -> entering INIT state | |
814 | * -> recvpacket_flag == 0: timeout in this state | |
815 | * -> otherwise: received a packet in this state | |
816 | * | |
817 | * Return conditions as handled by dhclient_state_machine(): | |
818 | * Returns 1, sendpacket_flag = 1: send packet, reset timer. | |
819 | * Returns 1, sendpacket_flag = 0: just reset the timer (wait for a milestone). | |
820 | * Returns 0: finish the nap which was interrupted for no good reason. | |
821 | * | |
cc26de46 TL |
822 | * Several per-interface variables are used to keep track of the process: |
823 | * active_lease: the lease that is being used on the interface | |
824 | * (null pointer if not configured yet). | |
825 | * offered_leases: leases corresponding to DHCPOFFER messages that have | |
826 | * been sent to us by DHCP servers. | |
827 | * acked_leases: leases corresponding to DHCPACK messages that have been | |
828 | * sent to us by DHCP servers. | |
829 | * sendpacket: DHCP packet we're trying to send. | |
469cf3a4 | 830 | * destination: IP address to send sendpacket to |
cc26de46 | 831 | * In addition, there are several relevant per-lease variables. |
469cf3a4 | 832 | * T1_expiry, T2_expiry, lease_expiry: lease milestones |
cc26de46 TL |
833 | * In the active lease, these control the process of renewing the lease; |
834 | * In leases on the acked_leases list, this simply determines when we | |
835 | * can no longer legitimately use the lease. | |
469cf3a4 TL |
836 | */ |
837 | ||
02d9e453 TL |
838 | void state_reboot (cpp) |
839 | void *cpp; | |
deff2d59 | 840 | { |
02d9e453 | 841 | struct client_state *client = cpp; |
84c4adde | 842 | |
deff2d59 | 843 | /* If we don't remember an active lease, go straight to INIT. */ |
02d9e453 | 844 | if (!client -> active || |
d758ad8c TL |
845 | client -> active -> is_bootp || |
846 | client -> active -> expiry <= cur_time) { | |
02d9e453 | 847 | state_init (client); |
deff2d59 TL |
848 | return; |
849 | } | |
850 | ||
851 | /* We are in the rebooting state. */ | |
02d9e453 | 852 | client -> state = S_REBOOTING; |
deff2d59 | 853 | |
420d8b3f FD |
854 | /* |
855 | * make_request doesn't initialize xid because it normally comes | |
856 | * from the DHCPDISCOVER, but we haven't sent a DHCPDISCOVER, | |
857 | * so pick an xid now. | |
858 | */ | |
02d9e453 | 859 | client -> xid = random (); |
5c2f78b4 | 860 | |
420d8b3f FD |
861 | /* |
862 | * Make a DHCPREQUEST packet, and set | |
863 | * appropriate per-interface flags. | |
864 | */ | |
02d9e453 TL |
865 | make_request (client, client -> active); |
866 | client -> destination = iaddr_broadcast; | |
867 | client -> first_sending = cur_time; | |
868 | client -> interval = client -> config -> initial_interval; | |
deff2d59 | 869 | |
b8cf055d | 870 | /* Zap the medium list... */ |
420d8b3f | 871 | client -> medium = NULL; |
b8cf055d TL |
872 | |
873 | /* Send out the first DHCPREQUEST packet. */ | |
02d9e453 | 874 | send_request (client); |
deff2d59 TL |
875 | } |
876 | ||
877 | /* Called when a lease has completely expired and we've been unable to | |
878 | renew it. */ | |
cc26de46 | 879 | |
02d9e453 TL |
880 | void state_init (cpp) |
881 | void *cpp; | |
469cf3a4 | 882 | { |
02d9e453 | 883 | struct client_state *client = cpp; |
84c4adde | 884 | |
469cf3a4 TL |
885 | ASSERT_STATE(state, S_INIT); |
886 | ||
cc26de46 TL |
887 | /* Make a DHCPDISCOVER packet, and set appropriate per-interface |
888 | flags. */ | |
02d9e453 TL |
889 | make_discover (client, client -> active); |
890 | client -> xid = client -> packet.xid; | |
891 | client -> destination = iaddr_broadcast; | |
892 | client -> state = S_SELECTING; | |
893 | client -> first_sending = cur_time; | |
894 | client -> interval = client -> config -> initial_interval; | |
cc26de46 TL |
895 | |
896 | /* Add an immediate timeout to cause the first DHCPDISCOVER packet | |
897 | to go out. */ | |
02d9e453 | 898 | send_discover (client); |
469cf3a4 TL |
899 | } |
900 | ||
420d8b3f FD |
901 | /* |
902 | * state_selecting is called when one or more DHCPOFFER packets have been | |
903 | * received and a configurable period of time has passed. | |
904 | */ | |
cc26de46 | 905 | |
02d9e453 TL |
906 | void state_selecting (cpp) |
907 | void *cpp; | |
469cf3a4 | 908 | { |
02d9e453 | 909 | struct client_state *client = cpp; |
b00d3884 TL |
910 | struct client_lease *lp, *next, *picked; |
911 | ||
02d9e453 | 912 | |
469cf3a4 TL |
913 | ASSERT_STATE(state, S_SELECTING); |
914 | ||
420d8b3f FD |
915 | /* |
916 | * Cancel state_selecting and send_discover timeouts, since either | |
917 | * one could have got us here. | |
918 | */ | |
02d9e453 TL |
919 | cancel_timeout (state_selecting, client); |
920 | cancel_timeout (send_discover, client); | |
cc26de46 | 921 | |
420d8b3f FD |
922 | /* |
923 | * We have received one or more DHCPOFFER packets. Currently, | |
924 | * the only criterion by which we judge leases is whether or | |
925 | * not we get a response when we arp for them. | |
926 | */ | |
927 | picked = NULL; | |
02d9e453 | 928 | for (lp = client -> offered_leases; lp; lp = next) { |
b00d3884 TL |
929 | next = lp -> next; |
930 | ||
420d8b3f FD |
931 | /* |
932 | * Check to see if we got an ARPREPLY for the address | |
933 | * in this particular lease. | |
934 | */ | |
b00d3884 | 935 | if (!picked) { |
b00d3884 | 936 | picked = lp; |
420d8b3f | 937 | picked -> next = NULL; |
b00d3884 | 938 | } else { |
02a015fb | 939 | destroy_client_lease (lp); |
b00d3884 TL |
940 | } |
941 | } | |
420d8b3f | 942 | client -> offered_leases = NULL; |
b00d3884 | 943 | |
420d8b3f FD |
944 | /* |
945 | * If we just tossed all the leases we were offered, go back | |
946 | * to square one. | |
947 | */ | |
b00d3884 | 948 | if (!picked) { |
02d9e453 TL |
949 | client -> state = S_INIT; |
950 | state_init (client); | |
b00d3884 TL |
951 | return; |
952 | } | |
953 | ||
66f973e4 | 954 | /* If it was a BOOTREPLY, we can just take the address right now. */ |
2455808f | 955 | if (picked -> is_bootp) { |
02d9e453 | 956 | client -> new = picked; |
66f973e4 TL |
957 | |
958 | /* Make up some lease expiry times | |
959 | XXX these should be configurable. */ | |
02d9e453 TL |
960 | client -> new -> expiry = cur_time + 12000; |
961 | client -> new -> renewal += cur_time + 8000; | |
962 | client -> new -> rebind += cur_time + 10000; | |
66f973e4 | 963 | |
02d9e453 | 964 | client -> state = S_REQUESTING; |
66f973e4 TL |
965 | |
966 | /* Bind to the address we received. */ | |
02d9e453 | 967 | bind_lease (client); |
66f973e4 TL |
968 | return; |
969 | } | |
970 | ||
b00d3884 | 971 | /* Go to the REQUESTING state. */ |
02d9e453 TL |
972 | client -> destination = iaddr_broadcast; |
973 | client -> state = S_REQUESTING; | |
974 | client -> first_sending = cur_time; | |
975 | client -> interval = client -> config -> initial_interval; | |
cc26de46 | 976 | |
b00d3884 | 977 | /* Make a DHCPREQUEST packet from the lease we picked. */ |
02d9e453 TL |
978 | make_request (client, picked); |
979 | client -> xid = client -> packet.xid; | |
469cf3a4 | 980 | |
b00d3884 | 981 | /* Toss the lease we picked - we'll get it back in a DHCPACK. */ |
02a015fb | 982 | destroy_client_lease (picked); |
b00d3884 | 983 | |
cc26de46 | 984 | /* Add an immediate timeout to send the first DHCPREQUEST packet. */ |
02d9e453 | 985 | send_request (client); |
3dbe2246 | 986 | } |
469cf3a4 | 987 | |
cc26de46 TL |
988 | /* state_requesting is called when we receive a DHCPACK message after |
989 | having sent out one or more DHCPREQUEST packets. */ | |
469cf3a4 | 990 | |
cc26de46 TL |
991 | void dhcpack (packet) |
992 | struct packet *packet; | |
469cf3a4 | 993 | { |
cc26de46 | 994 | struct interface_info *ip = packet -> interface; |
02d9e453 | 995 | struct client_state *client; |
cc26de46 | 996 | struct client_lease *lease; |
02a015fb TL |
997 | struct option_cache *oc; |
998 | struct data_string ds; | |
3dbe2246 | 999 | |
cc26de46 TL |
1000 | /* If we're not receptive to an offer right now, or if the offer |
1001 | has an unrecognizable transaction id, then just drop it. */ | |
02d9e453 TL |
1002 | for (client = ip -> client; client; client = client -> next) { |
1003 | if (client -> xid == packet -> raw -> xid) | |
1004 | break; | |
1005 | } | |
1006 | if (!client || | |
31730f17 | 1007 | (packet -> interface -> hw_address.hlen - 1 != |
5c2f78b4 | 1008 | packet -> raw -> hlen) || |
31730f17 | 1009 | (memcmp (&packet -> interface -> hw_address.hbuf [1], |
fcaec4ef | 1010 | packet -> raw -> chaddr, packet -> raw -> hlen))) { |
2d1b06e0 | 1011 | #if defined (DEBUG) |
8ae2d595 | 1012 | log_debug ("DHCPACK in wrong transaction."); |
2d1b06e0 | 1013 | #endif |
cc26de46 | 1014 | return; |
469cf3a4 | 1015 | } |
469cf3a4 | 1016 | |
02d9e453 TL |
1017 | if (client -> state != S_REBOOTING && |
1018 | client -> state != S_REQUESTING && | |
1019 | client -> state != S_RENEWING && | |
1020 | client -> state != S_REBINDING) { | |
2d1b06e0 | 1021 | #if defined (DEBUG) |
8ae2d595 | 1022 | log_debug ("DHCPACK in wrong state."); |
2d1b06e0 | 1023 | #endif |
cc26de46 | 1024 | return; |
469cf3a4 TL |
1025 | } |
1026 | ||
8ae2d595 | 1027 | log_info ("DHCPACK from %s", piaddr (packet -> client_addr)); |
34fdad6c | 1028 | |
6ceb9118 | 1029 | lease = packet_to_lease (packet, client); |
cc26de46 | 1030 | if (!lease) { |
8ae2d595 | 1031 | log_info ("packet_to_lease failed."); |
cc26de46 | 1032 | return; |
469cf3a4 TL |
1033 | } |
1034 | ||
02d9e453 | 1035 | client -> new = lease; |
cc26de46 TL |
1036 | |
1037 | /* Stop resending DHCPREQUEST. */ | |
02d9e453 | 1038 | cancel_timeout (send_request, client); |
cc26de46 TL |
1039 | |
1040 | /* Figure out the lease time. */ | |
230e73e4 | 1041 | oc = lookup_option (&dhcp_universe, client -> new -> options, |
02a015fb TL |
1042 | DHO_DHCP_LEASE_TIME); |
1043 | memset (&ds, 0, sizeof ds); | |
1044 | if (oc && | |
66e9cecf | 1045 | evaluate_option_cache (&ds, packet, (struct lease *)0, client, |
0852a27f | 1046 | packet -> options, client -> new -> options, |
cf78bf20 | 1047 | &global_scope, oc, MDL)) { |
02a015fb | 1048 | if (ds.len > 3) |
02d9e453 | 1049 | client -> new -> expiry = getULong (ds.data); |
02a015fb | 1050 | else |
02d9e453 | 1051 | client -> new -> expiry = 0; |
cf78bf20 | 1052 | data_string_forget (&ds, MDL); |
02a015fb | 1053 | } else |
02d9e453 | 1054 | client -> new -> expiry = 0; |
02a015fb | 1055 | |
02d9e453 | 1056 | if (!client -> new -> expiry) { |
8ae2d595 | 1057 | log_error ("no expiry time on offered lease."); |
02a015fb | 1058 | /* XXX this is going to be bad - if this _does_ |
3dbe2246 | 1059 | XXX happen, we should probably dynamically |
02a015fb TL |
1060 | XXX disqualify the DHCP server that gave us the |
1061 | XXX bad packet from future selections and | |
1062 | XXX then go back into the init state. */ | |
02d9e453 | 1063 | state_init (client); |
02a015fb TL |
1064 | return; |
1065 | } | |
cc26de46 | 1066 | |
62d0cb47 TL |
1067 | /* A number that looks negative here is really just very large, |
1068 | because the lease expiry offset is unsigned. */ | |
1069 | if (client -> new -> expiry < 0) | |
1070 | client -> new -> expiry = TIME_MAX; | |
02a015fb | 1071 | /* Take the server-provided renewal time if there is one. */ |
230e73e4 | 1072 | oc = lookup_option (&dhcp_universe, client -> new -> options, |
02a015fb TL |
1073 | DHO_DHCP_RENEWAL_TIME); |
1074 | if (oc && | |
66e9cecf | 1075 | evaluate_option_cache (&ds, packet, (struct lease *)0, client, |
0852a27f | 1076 | packet -> options, client -> new -> options, |
cf78bf20 | 1077 | &global_scope, oc, MDL)) { |
02a015fb | 1078 | if (ds.len > 3) |
02d9e453 | 1079 | client -> new -> renewal = getULong (ds.data); |
02a015fb | 1080 | else |
02d9e453 | 1081 | client -> new -> renewal = 0; |
cf78bf20 | 1082 | data_string_forget (&ds, MDL); |
02a015fb | 1083 | } else |
02d9e453 | 1084 | client -> new -> renewal = 0; |
02a015fb TL |
1085 | |
1086 | /* If it wasn't specified by the server, calculate it. */ | |
02d9e453 | 1087 | if (!client -> new -> renewal) |
98311e4b DH |
1088 | client -> new -> renewal = client -> new -> expiry / 2 + 1; |
1089 | ||
1090 | if (client -> new -> renewal <= 0) | |
1091 | client -> new -> renewal = TIME_MAX; | |
cc26de46 | 1092 | |
11373fb6 | 1093 | /* Now introduce some randomness to the renewal time: */ |
88cd8aca DH |
1094 | if (client->new->renewal <= ((TIME_MAX / 3) - 3)) |
1095 | client->new->renewal = (((client->new->renewal * 3) + 3) / 4) + | |
1096 | (((random() % client->new->renewal) + 3) / 4); | |
11373fb6 | 1097 | |
cc26de46 | 1098 | /* Same deal with the rebind time. */ |
230e73e4 | 1099 | oc = lookup_option (&dhcp_universe, client -> new -> options, |
02a015fb TL |
1100 | DHO_DHCP_REBINDING_TIME); |
1101 | if (oc && | |
66e9cecf | 1102 | evaluate_option_cache (&ds, packet, (struct lease *)0, client, |
0852a27f | 1103 | packet -> options, client -> new -> options, |
cf78bf20 | 1104 | &global_scope, oc, MDL)) { |
02a015fb | 1105 | if (ds.len > 3) |
02d9e453 | 1106 | client -> new -> rebind = getULong (ds.data); |
02a015fb | 1107 | else |
02d9e453 | 1108 | client -> new -> rebind = 0; |
cf78bf20 | 1109 | data_string_forget (&ds, MDL); |
02a015fb | 1110 | } else |
02d9e453 | 1111 | client -> new -> rebind = 0; |
02a015fb | 1112 | |
98311e4b DH |
1113 | if (client -> new -> rebind <= 0) { |
1114 | if (client -> new -> expiry <= TIME_MAX / 7) | |
1115 | client -> new -> rebind = | |
1116 | client -> new -> expiry * 7 / 8; | |
1117 | else | |
1118 | client -> new -> rebind = | |
1119 | client -> new -> expiry / 8 * 7; | |
1120 | } | |
11373fb6 TL |
1121 | |
1122 | /* Make sure our randomness didn't run the renewal time past the | |
1123 | rebind time. */ | |
98311e4b DH |
1124 | if (client -> new -> renewal > client -> new -> rebind) { |
1125 | if (client -> new -> rebind <= TIME_MAX / 3) | |
1126 | client -> new -> renewal = | |
1127 | client -> new -> rebind * 3 / 4; | |
1128 | else | |
1129 | client -> new -> renewal = | |
1130 | client -> new -> rebind / 4 * 3; | |
1131 | } | |
cc26de46 | 1132 | |
02d9e453 | 1133 | client -> new -> expiry += cur_time; |
62d0cb47 TL |
1134 | /* Lease lengths can never be negative. */ |
1135 | if (client -> new -> expiry < cur_time) | |
1136 | client -> new -> expiry = TIME_MAX; | |
02d9e453 | 1137 | client -> new -> renewal += cur_time; |
62d0cb47 TL |
1138 | if (client -> new -> renewal < cur_time) |
1139 | client -> new -> renewal = TIME_MAX; | |
02d9e453 | 1140 | client -> new -> rebind += cur_time; |
62d0cb47 TL |
1141 | if (client -> new -> rebind < cur_time) |
1142 | client -> new -> rebind = TIME_MAX; | |
cc26de46 | 1143 | |
02d9e453 | 1144 | bind_lease (client); |
66f973e4 TL |
1145 | } |
1146 | ||
02d9e453 TL |
1147 | void bind_lease (client) |
1148 | struct client_state *client; | |
66f973e4 | 1149 | { |
be62cf06 FD |
1150 | struct timeval tv; |
1151 | ||
9bdb9271 | 1152 | /* Remember the medium. */ |
02d9e453 | 1153 | client -> new -> medium = client -> medium; |
9bdb9271 | 1154 | |
cc26de46 | 1155 | /* Run the client script with the new parameters. */ |
02d9e453 | 1156 | script_init (client, (client -> state == S_REQUESTING |
cc26de46 | 1157 | ? "BOUND" |
02d9e453 | 1158 | : (client -> state == S_RENEWING |
cc26de46 | 1159 | ? "RENEW" |
02d9e453 | 1160 | : (client -> state == S_REBOOTING |
77967680 | 1161 | ? "REBOOT" : "REBIND"))), |
02d9e453 TL |
1162 | client -> new -> medium); |
1163 | if (client -> active && client -> state != S_REBOOTING) | |
1164 | script_write_params (client, "old_", client -> active); | |
1165 | script_write_params (client, "new_", client -> new); | |
1166 | if (client -> alias) | |
1167 | script_write_params (client, "alias_", client -> alias); | |
e16f4c3e TL |
1168 | |
1169 | /* If the BOUND/RENEW code detects another machine using the | |
1170 | offered address, it exits nonzero. We need to send a | |
1171 | DHCPDECLINE and toss the lease. */ | |
1172 | if (script_go (client)) { | |
1173 | make_decline (client, client -> new); | |
1174 | send_decline (client); | |
1175 | destroy_client_lease (client -> new); | |
7d3bc735 | 1176 | client -> new = (struct client_lease *)0; |
e16f4c3e TL |
1177 | state_init (client); |
1178 | return; | |
1179 | } | |
1180 | ||
1181 | /* Write out the new lease. */ | |
007e3ee4 | 1182 | write_client_lease (client, client -> new, 0, 0); |
cc26de46 TL |
1183 | |
1184 | /* Replace the old active lease with the new one. */ | |
02d9e453 TL |
1185 | if (client -> active) |
1186 | destroy_client_lease (client -> active); | |
1187 | client -> active = client -> new; | |
1188 | client -> new = (struct client_lease *)0; | |
cc26de46 TL |
1189 | |
1190 | /* Set up a timeout to start the renewal process. */ | |
be62cf06 FD |
1191 | tv . tv_sec = client -> active -> renewal; |
1192 | tv . tv_usec = 0; | |
1193 | add_timeout (&tv, state_bound, client, 0, 0); | |
cc26de46 | 1194 | |
ab58ff49 | 1195 | log_info ("bound to %s -- renewal in %ld seconds.", |
02d9e453 | 1196 | piaddr (client -> active -> address), |
ab58ff49 | 1197 | (long)(client -> active -> renewal - cur_time)); |
02d9e453 | 1198 | client -> state = S_BOUND; |
b00d3884 TL |
1199 | reinitialize_interfaces (); |
1200 | go_daemon (); | |
98bf1607 | 1201 | #if defined (NSUPDATE) |
98bd7ca0 | 1202 | if (client->config->do_forward_update) |
98bf1607 SR |
1203 | dhclient_schedule_updates(client, &client->active->address, 1); |
1204 | #endif | |
3dbe2246 | 1205 | } |
469cf3a4 | 1206 | |
cc26de46 TL |
1207 | /* state_bound is called when we've successfully bound to a particular |
1208 | lease, but the renewal time on that lease has expired. We are | |
1209 | expected to unicast a DHCPREQUEST to the server that gave us our | |
1210 | original lease. */ | |
469cf3a4 | 1211 | |
02d9e453 TL |
1212 | void state_bound (cpp) |
1213 | void *cpp; | |
469cf3a4 | 1214 | { |
02d9e453 | 1215 | struct client_state *client = cpp; |
02a015fb TL |
1216 | struct option_cache *oc; |
1217 | struct data_string ds; | |
84c4adde | 1218 | |
cc26de46 | 1219 | ASSERT_STATE(state, S_BOUND); |
469cf3a4 | 1220 | |
cc26de46 | 1221 | /* T1 has expired. */ |
02d9e453 TL |
1222 | make_request (client, client -> active); |
1223 | client -> xid = client -> packet.xid; | |
469cf3a4 | 1224 | |
02a015fb | 1225 | memset (&ds, 0, sizeof ds); |
230e73e4 | 1226 | oc = lookup_option (&dhcp_universe, client -> active -> options, |
02a015fb TL |
1227 | DHO_DHCP_SERVER_IDENTIFIER); |
1228 | if (oc && | |
0852a27f | 1229 | evaluate_option_cache (&ds, (struct packet *)0, (struct lease *)0, |
66e9cecf | 1230 | client, (struct option_state *)0, |
da38df14 | 1231 | client -> active -> options, |
cf78bf20 | 1232 | &global_scope, oc, MDL)) { |
02a015fb | 1233 | if (ds.len > 3) { |
02d9e453 TL |
1234 | memcpy (client -> destination.iabuf, ds.data, 4); |
1235 | client -> destination.len = 4; | |
02a015fb | 1236 | } else |
02d9e453 | 1237 | client -> destination = iaddr_broadcast; |
98311e4b DH |
1238 | |
1239 | data_string_forget (&ds, MDL); | |
cc26de46 | 1240 | } else |
02d9e453 | 1241 | client -> destination = iaddr_broadcast; |
469cf3a4 | 1242 | |
02d9e453 TL |
1243 | client -> first_sending = cur_time; |
1244 | client -> interval = client -> config -> initial_interval; | |
1245 | client -> state = S_RENEWING; | |
cc26de46 TL |
1246 | |
1247 | /* Send the first packet immediately. */ | |
02d9e453 | 1248 | send_request (client); |
3dbe2246 | 1249 | } |
469cf3a4 | 1250 | |
d758ad8c TL |
1251 | /* state_stop is called when we've been told to shut down. We unconfigure |
1252 | the interfaces, and then stop operating until told otherwise. */ | |
1253 | ||
1254 | void state_stop (cpp) | |
1255 | void *cpp; | |
1256 | { | |
1257 | struct client_state *client = cpp; | |
d758ad8c TL |
1258 | |
1259 | /* Cancel all timeouts. */ | |
af5fa176 EH |
1260 | cancel_timeout(state_selecting, client); |
1261 | cancel_timeout(send_discover, client); | |
1262 | cancel_timeout(send_request, client); | |
1263 | cancel_timeout(state_bound, client); | |
d758ad8c TL |
1264 | |
1265 | /* If we have an address, unconfigure it. */ | |
af5fa176 EH |
1266 | if (client->active) { |
1267 | script_init(client, "STOP", client->active->medium); | |
1268 | script_write_params(client, "old_", client->active); | |
1269 | if (client->alias) | |
1270 | script_write_params(client, "alias_", client->alias); | |
1271 | script_go(client); | |
d758ad8c | 1272 | } |
3dbe2246 | 1273 | } |
d758ad8c | 1274 | |
c1503c57 TL |
1275 | int commit_leases () |
1276 | { | |
1277 | return 0; | |
1278 | } | |
1279 | ||
1280 | int write_lease (lease) | |
1281 | struct lease *lease; | |
1282 | { | |
1283 | return 0; | |
95821729 TL |
1284 | } |
1285 | ||
628beb0e TL |
1286 | int write_host (host) |
1287 | struct host_decl *host; | |
1288 | { | |
1289 | return 0; | |
1290 | } | |
1291 | ||
7d7a35fa TL |
1292 | void db_startup (testp) |
1293 | int testp; | |
c1503c57 TL |
1294 | { |
1295 | } | |
1296 | ||
1297 | void bootp (packet) | |
1298 | struct packet *packet; | |
1299 | { | |
febbd402 DH |
1300 | struct iaddrmatchlist *ap; |
1301 | char addrbuf[4*16]; | |
1302 | char maskbuf[4*16]; | |
fa2b3e59 TL |
1303 | |
1304 | if (packet -> raw -> op != BOOTREPLY) | |
1305 | return; | |
1306 | ||
1307 | /* If there's a reject list, make sure this packet's sender isn't | |
1308 | on it. */ | |
1309 | for (ap = packet -> interface -> client -> config -> reject_list; | |
1310 | ap; ap = ap -> next) { | |
febbd402 DH |
1311 | if (addr_match(&packet->client_addr, &ap->match)) { |
1312 | ||
1313 | /* piaddr() returns its result in a static | |
1314 | buffer sized 4*16 (see common/inet.c). */ | |
1315 | ||
1316 | strcpy(addrbuf, piaddr(ap->match.addr)); | |
1317 | strcpy(maskbuf, piaddr(ap->match.mask)); | |
1318 | ||
1319 | log_info("BOOTREPLY from %s rejected by rule %s " | |
1320 | "mask %s.", piaddr(packet->client_addr), | |
1321 | addrbuf, maskbuf); | |
fa2b3e59 TL |
1322 | return; |
1323 | } | |
1324 | } | |
3dbe2246 | 1325 | |
fa2b3e59 | 1326 | dhcpoffer (packet); |
66f973e4 | 1327 | |
c1503c57 | 1328 | } |
95821729 | 1329 | |
c1503c57 TL |
1330 | void dhcp (packet) |
1331 | struct packet *packet; | |
95821729 | 1332 | { |
febbd402 | 1333 | struct iaddrmatchlist *ap; |
ea65d407 | 1334 | void (*handler) PROTO ((struct packet *)); |
b1b7b521 | 1335 | const char *type; |
febbd402 DH |
1336 | char addrbuf[4*16]; |
1337 | char maskbuf[4*16]; | |
fa2b3e59 | 1338 | |
c1503c57 TL |
1339 | switch (packet -> packet_type) { |
1340 | case DHCPOFFER: | |
fa2b3e59 TL |
1341 | handler = dhcpoffer; |
1342 | type = "DHCPOFFER"; | |
95821729 | 1343 | break; |
c1503c57 TL |
1344 | |
1345 | case DHCPNAK: | |
fa2b3e59 TL |
1346 | handler = dhcpnak; |
1347 | type = "DHCPNACK"; | |
c1503c57 TL |
1348 | break; |
1349 | ||
1350 | case DHCPACK: | |
fa2b3e59 TL |
1351 | handler = dhcpack; |
1352 | type = "DHCPACK"; | |
c1503c57 TL |
1353 | break; |
1354 | ||
95821729 | 1355 | default: |
fa2b3e59 TL |
1356 | return; |
1357 | } | |
1358 | ||
1359 | /* If there's a reject list, make sure this packet's sender isn't | |
1360 | on it. */ | |
1361 | for (ap = packet -> interface -> client -> config -> reject_list; | |
1362 | ap; ap = ap -> next) { | |
febbd402 DH |
1363 | if (addr_match(&packet->client_addr, &ap->match)) { |
1364 | ||
1365 | /* piaddr() returns its result in a static | |
1366 | buffer sized 4*16 (see common/inet.c). */ | |
1367 | ||
1368 | strcpy(addrbuf, piaddr(ap->match.addr)); | |
1369 | strcpy(maskbuf, piaddr(ap->match.mask)); | |
1370 | ||
1371 | log_info("%s from %s rejected by rule %s mask %s.", | |
1372 | type, piaddr(packet->client_addr), | |
1373 | addrbuf, maskbuf); | |
fa2b3e59 TL |
1374 | return; |
1375 | } | |
95821729 | 1376 | } |
fa2b3e59 | 1377 | (*handler) (packet); |
95821729 TL |
1378 | } |
1379 | ||
fe5b0fdd | 1380 | #ifdef DHCPv6 |
3dbe2246 | 1381 | void |
98bd7ca0 DH |
1382 | dhcpv6(struct packet *packet) { |
1383 | struct iaddrmatchlist *ap; | |
1384 | struct client_state *client; | |
1385 | char addrbuf[sizeof("ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff")]; | |
1386 | ||
1387 | /* Silently drop bogus messages. */ | |
1388 | if (packet->dhcpv6_msg_type >= dhcpv6_type_name_max) | |
1389 | return; | |
1390 | ||
1391 | /* Discard, with log, packets from quenched sources. */ | |
1392 | for (ap = packet->interface->client->config->reject_list ; | |
1393 | ap ; ap = ap->next) { | |
1394 | if (addr_match(&packet->client_addr, &ap->match)) { | |
1395 | strcpy(addrbuf, piaddr(packet->client_addr)); | |
1396 | log_info("%s from %s rejected by rule %s", | |
1397 | dhcpv6_type_names[packet->dhcpv6_msg_type], | |
1398 | addrbuf, | |
1399 | piaddrmask(&ap->match.addr, &ap->match.mask)); | |
1400 | return; | |
1401 | } | |
1402 | } | |
1403 | ||
1404 | /* Screen out nonsensical messages. */ | |
1405 | switch(packet->dhcpv6_msg_type) { | |
1406 | case DHCPV6_ADVERTISE: | |
98bd7ca0 | 1407 | case DHCPV6_RECONFIGURE: |
3dbe2246 FD |
1408 | if (stateless) |
1409 | return; | |
1410 | /* Falls through */ | |
1411 | case DHCPV6_REPLY: | |
98bd7ca0 DH |
1412 | log_info("RCV: %s message on %s from %s.", |
1413 | dhcpv6_type_names[packet->dhcpv6_msg_type], | |
1414 | packet->interface->name, piaddr(packet->client_addr)); | |
1415 | break; | |
1416 | ||
1417 | default: | |
1418 | return; | |
1419 | } | |
1420 | ||
1421 | /* Find a client state that matches the incoming XID. */ | |
1422 | for (client = packet->interface->client ; client ; | |
1423 | client = client->next) { | |
1424 | if (memcmp(&client->dhcpv6_transaction_id, | |
1425 | packet->dhcpv6_transaction_id, 3) == 0) { | |
1426 | client->v6_handler(packet, client); | |
1427 | return; | |
1428 | } | |
1429 | } | |
1430 | ||
20ae1aff | 1431 | /* XXX: temporary log for debugging */ |
98bd7ca0 DH |
1432 | log_info("Packet received, but nothing done with it."); |
1433 | } | |
fe5b0fdd | 1434 | #endif /* DHCPv6 */ |
98bd7ca0 | 1435 | |
c1503c57 TL |
1436 | void dhcpoffer (packet) |
1437 | struct packet *packet; | |
95821729 | 1438 | { |
cc26de46 | 1439 | struct interface_info *ip = packet -> interface; |
02d9e453 | 1440 | struct client_state *client; |
b00d3884 | 1441 | struct client_lease *lease, *lp; |
0c20eab3 | 1442 | struct option **req; |
cc26de46 | 1443 | int i; |
e16f4c3e | 1444 | int stop_selecting; |
b1b7b521 | 1445 | const char *name = packet -> packet_type ? "DHCPOFFER" : "BOOTREPLY"; |
d758ad8c | 1446 | char obuf [1024]; |
be62cf06 | 1447 | struct timeval tv; |
3dbe2246 | 1448 | |
cc26de46 | 1449 | #ifdef DEBUG_PACKET |
c1503c57 | 1450 | dump_packet (packet); |
3dbe2246 | 1451 | #endif |
cc26de46 | 1452 | |
02d9e453 TL |
1453 | /* Find a client state that matches the xid... */ |
1454 | for (client = ip -> client; client; client = client -> next) | |
1455 | if (client -> xid == packet -> raw -> xid) | |
1456 | break; | |
1457 | ||
cc26de46 TL |
1458 | /* If we're not receptive to an offer right now, or if the offer |
1459 | has an unrecognizable transaction id, then just drop it. */ | |
02d9e453 | 1460 | if (!client || |
73530742 | 1461 | client -> state != S_SELECTING || |
31730f17 | 1462 | (packet -> interface -> hw_address.hlen - 1 != |
fcaec4ef | 1463 | packet -> raw -> hlen) || |
31730f17 | 1464 | (memcmp (&packet -> interface -> hw_address.hbuf [1], |
fcaec4ef | 1465 | packet -> raw -> chaddr, packet -> raw -> hlen))) { |
2d1b06e0 | 1466 | #if defined (DEBUG) |
8ae2d595 | 1467 | log_debug ("%s in wrong transaction.", name); |
2d1b06e0 | 1468 | #endif |
cc26de46 TL |
1469 | return; |
1470 | } | |
1471 | ||
d758ad8c | 1472 | sprintf (obuf, "%s from %s", name, piaddr (packet -> client_addr)); |
34fdad6c | 1473 | |
b8cf055d | 1474 | |
0c20eab3 DH |
1475 | /* If this lease doesn't supply the minimum required DHCPv4 parameters, |
1476 | * ignore it. | |
1477 | */ | |
1478 | req = client->config->required_options; | |
1479 | if (req != NULL) { | |
1480 | for (i = 0 ; req[i] != NULL ; i++) { | |
1481 | if ((req[i]->universe == &dhcp_universe) && | |
1482 | !lookup_option(&dhcp_universe, packet->options, | |
1483 | req[i]->code)) { | |
1484 | struct option *option = NULL; | |
1485 | unsigned code = req[i]->code; | |
1486 | ||
1487 | option_code_hash_lookup(&option, | |
1488 | dhcp_universe.code_hash, | |
1489 | &code, 0, MDL); | |
1490 | ||
1491 | if (option) | |
1492 | log_info("%s: no %s option.", obuf, | |
1493 | option->name); | |
1494 | else | |
1495 | log_info("%s: no unknown-%u option.", | |
1496 | obuf, code); | |
f7fdb216 | 1497 | |
0c20eab3 | 1498 | option_dereference(&option, MDL); |
f7fdb216 | 1499 | |
0c20eab3 DH |
1500 | return; |
1501 | } | |
cc26de46 TL |
1502 | } |
1503 | } | |
1504 | ||
1505 | /* If we've already seen this lease, don't record it again. */ | |
02d9e453 | 1506 | for (lease = client -> offered_leases; lease; lease = lease -> next) { |
cc26de46 TL |
1507 | if (lease -> address.len == sizeof packet -> raw -> yiaddr && |
1508 | !memcmp (lease -> address.iabuf, | |
1509 | &packet -> raw -> yiaddr, lease -> address.len)) { | |
d758ad8c | 1510 | log_debug ("%s: already seen.", obuf); |
cc26de46 TL |
1511 | return; |
1512 | } | |
1513 | } | |
1514 | ||
6ceb9118 | 1515 | lease = packet_to_lease (packet, client); |
cc26de46 | 1516 | if (!lease) { |
d758ad8c | 1517 | log_info ("%s: packet_to_lease failed.", obuf); |
cc26de46 TL |
1518 | return; |
1519 | } | |
1520 | ||
66f973e4 TL |
1521 | /* If this lease was acquired through a BOOTREPLY, record that |
1522 | fact. */ | |
02a015fb | 1523 | if (!packet -> options_valid || !packet -> packet_type) |
66f973e4 TL |
1524 | lease -> is_bootp = 1; |
1525 | ||
9bdb9271 | 1526 | /* Record the medium under which this lease was offered. */ |
02d9e453 | 1527 | lease -> medium = client -> medium; |
9bdb9271 | 1528 | |
b00d3884 | 1529 | /* Figure out when we're supposed to stop selecting. */ |
02d9e453 TL |
1530 | stop_selecting = (client -> first_sending + |
1531 | client -> config -> select_interval); | |
b00d3884 TL |
1532 | |
1533 | /* If this is the lease we asked for, put it at the head of the | |
1534 | list, and don't mess with the arp request timeout. */ | |
02d9e453 | 1535 | if (lease -> address.len == client -> requested_address.len && |
b00d3884 | 1536 | !memcmp (lease -> address.iabuf, |
02d9e453 TL |
1537 | client -> requested_address.iabuf, |
1538 | client -> requested_address.len)) { | |
1539 | lease -> next = client -> offered_leases; | |
1540 | client -> offered_leases = lease; | |
b00d3884 | 1541 | } else { |
b00d3884 TL |
1542 | /* Put the lease at the end of the list. */ |
1543 | lease -> next = (struct client_lease *)0; | |
02d9e453 TL |
1544 | if (!client -> offered_leases) |
1545 | client -> offered_leases = lease; | |
b00d3884 | 1546 | else { |
02d9e453 | 1547 | for (lp = client -> offered_leases; lp -> next; |
b00d3884 TL |
1548 | lp = lp -> next) |
1549 | ; | |
1550 | lp -> next = lease; | |
1551 | } | |
1552 | } | |
1553 | ||
cc26de46 TL |
1554 | /* If the selecting interval has expired, go immediately to |
1555 | state_selecting(). Otherwise, time out into | |
1556 | state_selecting at the select interval. */ | |
b00d3884 | 1557 | if (stop_selecting <= 0) |
d758ad8c | 1558 | state_selecting (client); |
84c4adde | 1559 | else { |
be62cf06 FD |
1560 | tv . tv_sec = stop_selecting; |
1561 | tv . tv_usec = 0; | |
1562 | add_timeout (&tv, state_selecting, client, 0, 0); | |
02d9e453 | 1563 | cancel_timeout (send_discover, client); |
84c4adde | 1564 | } |
d758ad8c | 1565 | log_info ("%s", obuf); |
95821729 | 1566 | } |
e581d615 | 1567 | |
cc26de46 TL |
1568 | /* Allocate a client_lease structure and initialize it from the parameters |
1569 | in the specified packet. */ | |
1570 | ||
6ceb9118 | 1571 | struct client_lease *packet_to_lease (packet, client) |
c1503c57 | 1572 | struct packet *packet; |
6ceb9118 | 1573 | struct client_state *client; |
e581d615 | 1574 | { |
cc26de46 | 1575 | struct client_lease *lease; |
b5f904a9 | 1576 | unsigned i; |
02a015fb | 1577 | struct option_cache *oc; |
f7fdb216 | 1578 | struct option *option = NULL; |
02a015fb | 1579 | struct data_string data; |
cc26de46 | 1580 | |
cf78bf20 | 1581 | lease = (struct client_lease *)new_client_lease (MDL); |
cc26de46 TL |
1582 | |
1583 | if (!lease) { | |
89c425dd | 1584 | log_error ("packet_to_lease: no memory to record lease.\n"); |
cc26de46 TL |
1585 | return (struct client_lease *)0; |
1586 | } | |
1587 | ||
1588 | memset (lease, 0, sizeof *lease); | |
1589 | ||
1590 | /* Copy the lease options. */ | |
cf78bf20 | 1591 | option_state_reference (&lease -> options, packet -> options, MDL); |
cc26de46 TL |
1592 | |
1593 | lease -> address.len = sizeof (packet -> raw -> yiaddr); | |
1594 | memcpy (lease -> address.iabuf, &packet -> raw -> yiaddr, | |
1595 | lease -> address.len); | |
1596 | ||
98311e4b DH |
1597 | memset (&data, 0, sizeof data); |
1598 | ||
b5f904a9 TL |
1599 | if (client -> config -> vendor_space_name) { |
1600 | i = DHO_VENDOR_ENCAPSULATED_OPTIONS; | |
1601 | ||
1602 | /* See if there was a vendor encapsulation option. */ | |
1603 | oc = lookup_option (&dhcp_universe, lease -> options, i); | |
b5f904a9 TL |
1604 | if (oc && |
1605 | client -> config -> vendor_space_name && | |
66e9cecf TL |
1606 | evaluate_option_cache (&data, packet, |
1607 | (struct lease *)0, client, | |
b5f904a9 TL |
1608 | packet -> options, lease -> options, |
1609 | &global_scope, oc, MDL)) { | |
1610 | if (data.len) { | |
f7fdb216 DH |
1611 | if (!option_code_hash_lookup(&option, |
1612 | dhcp_universe.code_hash, | |
1613 | &i, 0, MDL)) | |
1614 | log_fatal("Unable to find VENDOR " | |
1615 | "option (%s:%d).", MDL); | |
b5f904a9 | 1616 | parse_encapsulated_suboptions |
f7fdb216 | 1617 | (packet -> options, option, |
b5f904a9 TL |
1618 | data.data, data.len, &dhcp_universe, |
1619 | client -> config -> vendor_space_name | |
1620 | ); | |
f7fdb216 DH |
1621 | |
1622 | option_dereference(&option, MDL); | |
b5f904a9 TL |
1623 | } |
1624 | data_string_forget (&data, MDL); | |
1625 | } | |
1626 | } else | |
1627 | i = 0; | |
1628 | ||
02a015fb | 1629 | /* Figure out the overload flag. */ |
230e73e4 | 1630 | oc = lookup_option (&dhcp_universe, lease -> options, |
02a015fb | 1631 | DHO_DHCP_OPTION_OVERLOAD); |
02a015fb | 1632 | if (oc && |
66e9cecf | 1633 | evaluate_option_cache (&data, packet, (struct lease *)0, client, |
0852a27f | 1634 | packet -> options, lease -> options, |
cf78bf20 | 1635 | &global_scope, oc, MDL)) { |
02a015fb TL |
1636 | if (data.len > 0) |
1637 | i = data.data [0]; | |
1638 | else | |
1639 | i = 0; | |
cf78bf20 | 1640 | data_string_forget (&data, MDL); |
02a015fb TL |
1641 | } else |
1642 | i = 0; | |
1643 | ||
cc26de46 | 1644 | /* If the server name was filled out, copy it. */ |
02a015fb | 1645 | if (!(i & 2) && packet -> raw -> sname [0]) { |
b1b7b521 | 1646 | unsigned len; |
cc26de46 | 1647 | /* Don't count on the NUL terminator. */ |
e2624b82 | 1648 | for (len = 0; len < DHCP_SNAME_LEN; len++) |
cc26de46 TL |
1649 | if (!packet -> raw -> sname [len]) |
1650 | break; | |
cf78bf20 | 1651 | lease -> server_name = dmalloc (len + 1, MDL); |
cc26de46 | 1652 | if (!lease -> server_name) { |
98311e4b | 1653 | log_error ("dhcpoffer: no memory for server name.\n"); |
02a015fb | 1654 | destroy_client_lease (lease); |
cc26de46 TL |
1655 | return (struct client_lease *)0; |
1656 | } else { | |
1657 | memcpy (lease -> server_name, | |
1658 | packet -> raw -> sname, len); | |
1659 | lease -> server_name [len] = 0; | |
1660 | } | |
1661 | } | |
1662 | ||
1663 | /* Ditto for the filename. */ | |
0852a27f | 1664 | if (!(i & 1) && packet -> raw -> file [0]) { |
b1b7b521 | 1665 | unsigned len; |
cc26de46 | 1666 | /* Don't count on the NUL terminator. */ |
e2624b82 | 1667 | for (len = 0; len < DHCP_FILE_LEN; len++) |
cc26de46 TL |
1668 | if (!packet -> raw -> file [len]) |
1669 | break; | |
cf78bf20 | 1670 | lease -> filename = dmalloc (len + 1, MDL); |
cc26de46 | 1671 | if (!lease -> filename) { |
8ae2d595 | 1672 | log_error ("dhcpoffer: no memory for filename.\n"); |
02a015fb | 1673 | destroy_client_lease (lease); |
cc26de46 TL |
1674 | return (struct client_lease *)0; |
1675 | } else { | |
1676 | memcpy (lease -> filename, | |
1677 | packet -> raw -> file, len); | |
1678 | lease -> filename [len] = 0; | |
1679 | } | |
1680 | } | |
89c425dd TL |
1681 | |
1682 | execute_statements_in_scope ((struct binding_value **)0, | |
1683 | (struct packet *)packet, | |
66e9cecf TL |
1684 | (struct lease *)0, client, |
1685 | lease -> options, lease -> options, | |
1686 | &global_scope, | |
89c425dd TL |
1687 | client -> config -> on_receipt, |
1688 | (struct group *)0); | |
1689 | ||
cc26de46 | 1690 | return lease; |
3dbe2246 | 1691 | } |
e581d615 | 1692 | |
c1503c57 TL |
1693 | void dhcpnak (packet) |
1694 | struct packet *packet; | |
1695 | { | |
deff2d59 | 1696 | struct interface_info *ip = packet -> interface; |
02d9e453 TL |
1697 | struct client_state *client; |
1698 | ||
1699 | /* Find a client state that matches the xid... */ | |
1700 | for (client = ip -> client; client; client = client -> next) | |
1701 | if (client -> xid == packet -> raw -> xid) | |
1702 | break; | |
deff2d59 | 1703 | |
deff2d59 TL |
1704 | /* If we're not receptive to an offer right now, or if the offer |
1705 | has an unrecognizable transaction id, then just drop it. */ | |
02d9e453 | 1706 | if (!client || |
31730f17 | 1707 | (packet -> interface -> hw_address.hlen - 1 != |
fcaec4ef | 1708 | packet -> raw -> hlen) || |
31730f17 | 1709 | (memcmp (&packet -> interface -> hw_address.hbuf [1], |
fcaec4ef | 1710 | packet -> raw -> chaddr, packet -> raw -> hlen))) { |
2d1b06e0 | 1711 | #if defined (DEBUG) |
8ae2d595 | 1712 | log_debug ("DHCPNAK in wrong transaction."); |
2d1b06e0 | 1713 | #endif |
deff2d59 TL |
1714 | return; |
1715 | } | |
1716 | ||
02d9e453 TL |
1717 | if (client -> state != S_REBOOTING && |
1718 | client -> state != S_REQUESTING && | |
1719 | client -> state != S_RENEWING && | |
1720 | client -> state != S_REBINDING) { | |
2d1b06e0 | 1721 | #if defined (DEBUG) |
8ae2d595 | 1722 | log_debug ("DHCPNAK in wrong state."); |
2d1b06e0 | 1723 | #endif |
deff2d59 TL |
1724 | return; |
1725 | } | |
1726 | ||
8ae2d595 | 1727 | log_info ("DHCPNAK from %s", piaddr (packet -> client_addr)); |
34fdad6c | 1728 | |
02d9e453 | 1729 | if (!client -> active) { |
2d1b06e0 | 1730 | #if defined (DEBUG) |
8ae2d595 | 1731 | log_info ("DHCPNAK with no active lease.\n"); |
2d1b06e0 | 1732 | #endif |
deff2d59 TL |
1733 | return; |
1734 | } | |
1735 | ||
6cbc6629 DH |
1736 | /* If we get a DHCPNAK, we use the EXPIRE dhclient-script state |
1737 | * to indicate that we want all old bindings to be removed. (It | |
1738 | * is possible that we may get a NAK while in the RENEW state, | |
1739 | * so we might have bindings active at that time) | |
1740 | */ | |
1741 | script_init(client, "EXPIRE", NULL); | |
1742 | script_write_params(client, "old_", client->active); | |
1743 | if (client->alias) | |
1744 | script_write_params(client, "alias_", client->alias); | |
1745 | script_go(client); | |
1746 | ||
02d9e453 TL |
1747 | destroy_client_lease (client -> active); |
1748 | client -> active = (struct client_lease *)0; | |
deff2d59 TL |
1749 | |
1750 | /* Stop sending DHCPREQUEST packets... */ | |
02d9e453 | 1751 | cancel_timeout (send_request, client); |
deff2d59 | 1752 | |
0a73b7b6 SK |
1753 | /* On some scripts, 'EXPIRE' causes the interface to be ifconfig'd |
1754 | * down (this expunges any routes and arp cache). This makes the | |
1755 | * interface unusable by state_init(), which we call next. So, we | |
1756 | * need to 'PREINIT' the interface to bring it back up. | |
1757 | */ | |
1758 | script_init(client, "PREINIT", NULL); | |
1759 | if (client->alias) | |
1760 | script_write_params(client, "alias_", client->alias); | |
1761 | script_go(client); | |
1762 | ||
02d9e453 TL |
1763 | client -> state = S_INIT; |
1764 | state_init (client); | |
e581d615 TL |
1765 | } |
1766 | ||
cc26de46 | 1767 | /* Send out a DHCPDISCOVER packet, and set a timeout to send out another |
66f973e4 TL |
1768 | one after the right interval has expired. If we don't get an offer by |
1769 | the time we reach the panic interval, call the panic function. */ | |
469cf3a4 | 1770 | |
02d9e453 TL |
1771 | void send_discover (cpp) |
1772 | void *cpp; | |
469cf3a4 | 1773 | { |
02d9e453 | 1774 | struct client_state *client = cpp; |
84c4adde | 1775 | |
cc26de46 TL |
1776 | int result; |
1777 | int interval; | |
9bdb9271 | 1778 | int increase = 1; |
be62cf06 | 1779 | struct timeval tv; |
cc26de46 TL |
1780 | |
1781 | /* Figure out how long it's been since we started transmitting. */ | |
02d9e453 | 1782 | interval = cur_time - client -> first_sending; |
cc26de46 TL |
1783 | |
1784 | /* If we're past the panic timeout, call the script and tell it | |
1785 | we haven't found anything for this interface yet. */ | |
02d9e453 TL |
1786 | if (interval > client -> config -> timeout) { |
1787 | state_panic (client); | |
b00d3884 | 1788 | return; |
cc26de46 | 1789 | } |
469cf3a4 | 1790 | |
9bdb9271 TL |
1791 | /* If we're selecting media, try the whole list before doing |
1792 | the exponential backoff, but if we've already received an | |
1793 | offer, stop looping, because we obviously have it right. */ | |
02d9e453 TL |
1794 | if (!client -> offered_leases && |
1795 | client -> config -> media) { | |
9bdb9271 TL |
1796 | int fail = 0; |
1797 | again: | |
02d9e453 TL |
1798 | if (client -> medium) { |
1799 | client -> medium = client -> medium -> next; | |
9bdb9271 | 1800 | increase = 0; |
3dbe2246 | 1801 | } |
02d9e453 | 1802 | if (!client -> medium) { |
9bdb9271 | 1803 | if (fail) |
8ae2d595 | 1804 | log_fatal ("No valid media types for %s!", |
02d9e453 TL |
1805 | client -> interface -> name); |
1806 | client -> medium = | |
1807 | client -> config -> media; | |
9bdb9271 TL |
1808 | increase = 1; |
1809 | } | |
3dbe2246 | 1810 | |
8ae2d595 | 1811 | log_info ("Trying medium \"%s\" %d", |
b1423aed | 1812 | client -> medium -> string, increase); |
02d9e453 TL |
1813 | script_init (client, "MEDIUM", client -> medium); |
1814 | if (script_go (client)) { | |
b1423aed | 1815 | fail = 1; |
9bdb9271 TL |
1816 | goto again; |
1817 | } | |
1818 | } | |
cc26de46 | 1819 | |
9bdb9271 TL |
1820 | /* If we're supposed to increase the interval, do so. If it's |
1821 | currently zero (i.e., we haven't sent any packets yet), set | |
98311e4b DH |
1822 | it to initial_interval; otherwise, add to it a random number |
1823 | between zero and two times itself. On average, this means | |
1824 | that it will double with every transmission. */ | |
9bdb9271 | 1825 | if (increase) { |
88cd8aca DH |
1826 | if (!client->interval) |
1827 | client->interval = client->config->initial_interval; | |
b1423aed | 1828 | else |
88cd8aca | 1829 | client->interval += random() % (2 * client->interval); |
cc26de46 | 1830 | |
34fdad6c | 1831 | /* Don't backoff past cutoff. */ |
88cd8aca DH |
1832 | if (client->interval > client->config->backoff_cutoff) |
1833 | client->interval = (client->config->backoff_cutoff / 2) | |
1834 | + (random() % client->config->backoff_cutoff); | |
1835 | } else if (!client->interval) | |
1836 | client->interval = client->config->initial_interval; | |
3dbe2246 | 1837 | |
cc26de46 TL |
1838 | /* If the backoff would take us to the panic timeout, just use that |
1839 | as the interval. */ | |
02d9e453 TL |
1840 | if (cur_time + client -> interval > |
1841 | client -> first_sending + client -> config -> timeout) | |
1842 | client -> interval = | |
1843 | (client -> first_sending + | |
1844 | client -> config -> timeout) - cur_time + 1; | |
cc26de46 | 1845 | |
34fdad6c | 1846 | /* Record the number of seconds since we started sending. */ |
af6df788 TL |
1847 | if (interval < 65536) |
1848 | client -> packet.secs = htons (interval); | |
34fdad6c | 1849 | else |
af6df788 TL |
1850 | client -> packet.secs = htons (65535); |
1851 | client -> secs = client -> packet.secs; | |
34fdad6c | 1852 | |
8ae2d595 | 1853 | log_info ("DHCPDISCOVER on %s to %s port %d interval %ld", |
02d9e453 | 1854 | client -> name ? client -> name : client -> interface -> name, |
66f973e4 | 1855 | inet_ntoa (sockaddr_broadcast.sin_addr), |
c4661845 | 1856 | ntohs (sockaddr_broadcast.sin_port), (long)(client -> interval)); |
66f973e4 | 1857 | |
cc26de46 | 1858 | /* Send out a packet. */ |
02d9e453 TL |
1859 | result = send_packet (client -> interface, (struct packet *)0, |
1860 | &client -> packet, | |
1861 | client -> packet_length, | |
cc26de46 TL |
1862 | inaddr_any, &sockaddr_broadcast, |
1863 | (struct hardware *)0); | |
469cf3a4 | 1864 | |
be62cf06 FD |
1865 | tv . tv_sec = cur_time + client -> interval; |
1866 | tv . tv_usec = 0; | |
1867 | add_timeout (&tv, send_discover, client, 0, 0); | |
469cf3a4 TL |
1868 | } |
1869 | ||
b00d3884 TL |
1870 | /* state_panic gets called if we haven't received any offers in a preset |
1871 | amount of time. When this happens, we try to use existing leases that | |
1872 | haven't yet expired, and failing that, we call the client script and | |
1873 | hope it can do something. */ | |
1874 | ||
02d9e453 TL |
1875 | void state_panic (cpp) |
1876 | void *cpp; | |
b00d3884 | 1877 | { |
02d9e453 TL |
1878 | struct client_state *client = cpp; |
1879 | struct client_lease *loop; | |
b00d3884 | 1880 | struct client_lease *lp; |
be62cf06 | 1881 | struct timeval tv; |
b00d3884 | 1882 | |
02d9e453 TL |
1883 | loop = lp = client -> active; |
1884 | ||
8ae2d595 | 1885 | log_info ("No DHCPOFFERS received."); |
b00d3884 | 1886 | |
deff2d59 TL |
1887 | /* We may not have an active lease, but we may have some |
1888 | predefined leases that we can try. */ | |
02d9e453 | 1889 | if (!client -> active && client -> leases) |
deff2d59 | 1890 | goto activate_next; |
deff2d59 | 1891 | |
b00d3884 | 1892 | /* Run through the list of leases and see if one can be used. */ |
02d9e453 TL |
1893 | while (client -> active) { |
1894 | if (client -> active -> expiry > cur_time) { | |
8ae2d595 | 1895 | log_info ("Trying recorded lease %s", |
02d9e453 | 1896 | piaddr (client -> active -> address)); |
b00d3884 TL |
1897 | /* Run the client script with the existing |
1898 | parameters. */ | |
02d9e453 TL |
1899 | script_init (client, "TIMEOUT", |
1900 | client -> active -> medium); | |
1901 | script_write_params (client, "new_", client -> active); | |
1902 | if (client -> alias) | |
1903 | script_write_params (client, "alias_", | |
1904 | client -> alias); | |
b00d3884 TL |
1905 | |
1906 | /* If the old lease is still good and doesn't | |
1907 | yet need renewal, go into BOUND state and | |
1908 | timeout at the renewal time. */ | |
02d9e453 | 1909 | if (!script_go (client)) { |
1c016679 TL |
1910 | if (cur_time < client -> active -> renewal) { |
1911 | client -> state = S_BOUND; | |
1912 | log_info ("bound: renewal in %ld %s.", | |
1913 | (long)(client -> active -> renewal - | |
1914 | cur_time), "seconds"); | |
be62cf06 FD |
1915 | tv . tv_sec = client -> active -> renewal; |
1916 | tv . tv_usec = 0; | |
1917 | add_timeout (&tv, state_bound, client, 0, 0); | |
1c016679 TL |
1918 | } else { |
1919 | client -> state = S_BOUND; | |
1920 | log_info ("bound: immediate renewal."); | |
1921 | state_bound (client); | |
1922 | } | |
1923 | reinitialize_interfaces (); | |
1924 | go_daemon (); | |
1925 | return; | |
b00d3884 TL |
1926 | } |
1927 | } | |
1928 | ||
1929 | /* If there are no other leases, give up. */ | |
02d9e453 TL |
1930 | if (!client -> leases) { |
1931 | client -> leases = client -> active; | |
1932 | client -> active = (struct client_lease *)0; | |
b00d3884 TL |
1933 | break; |
1934 | } | |
1935 | ||
deff2d59 | 1936 | activate_next: |
b00d3884 TL |
1937 | /* Otherwise, put the active lease at the end of the |
1938 | lease list, and try another lease.. */ | |
02d9e453 | 1939 | for (lp = client -> leases; lp -> next; lp = lp -> next) |
b00d3884 | 1940 | ; |
02d9e453 | 1941 | lp -> next = client -> active; |
34fdad6c TL |
1942 | if (lp -> next) { |
1943 | lp -> next -> next = (struct client_lease *)0; | |
1944 | } | |
02d9e453 TL |
1945 | client -> active = client -> leases; |
1946 | client -> leases = client -> leases -> next; | |
b00d3884 TL |
1947 | |
1948 | /* If we already tried this lease, we've exhausted the | |
1949 | set of leases, so we might as well give up for | |
1950 | now. */ | |
02d9e453 | 1951 | if (client -> active == loop) |
b00d3884 | 1952 | break; |
66f973e4 | 1953 | else if (!loop) |
02d9e453 | 1954 | loop = client -> active; |
b00d3884 TL |
1955 | } |
1956 | ||
1957 | /* No leases were available, or what was available didn't work, so | |
1958 | tell the shell script that we failed to allocate an address, | |
1959 | and try again later. */ | |
c08637bb TL |
1960 | if (onetry) { |
1961 | if (!quiet) | |
1962 | log_info ("Unable to obtain a lease on first try.%s", | |
1963 | " Exiting."); | |
1964 | exit (2); | |
1965 | } | |
1966 | ||
11373fb6 | 1967 | log_info ("No working leases in persistent database - sleeping."); |
02d9e453 TL |
1968 | script_init (client, "FAIL", (struct string_list *)0); |
1969 | if (client -> alias) | |
1970 | script_write_params (client, "alias_", client -> alias); | |
1971 | script_go (client); | |
1972 | client -> state = S_INIT; | |
be62cf06 | 1973 | tv . tv_sec = cur_time + |
11373fb6 | 1974 | ((client -> config -> retry_interval + 1) / 2 + |
be62cf06 FD |
1975 | (random () % client -> config -> retry_interval)); |
1976 | tv . tv_usec = 0; | |
1977 | add_timeout (&tv, state_init, client, 0, 0); | |
ae04fa03 | 1978 | go_daemon (); |
b00d3884 TL |
1979 | } |
1980 | ||
02d9e453 TL |
1981 | void send_request (cpp) |
1982 | void *cpp; | |
e581d615 | 1983 | { |
02d9e453 | 1984 | struct client_state *client = cpp; |
84c4adde | 1985 | |
c1503c57 | 1986 | int result; |
cc26de46 TL |
1987 | int interval; |
1988 | struct sockaddr_in destination; | |
1989 | struct in_addr from; | |
be62cf06 | 1990 | struct timeval tv; |
cc26de46 TL |
1991 | |
1992 | /* Figure out how long it's been since we started transmitting. */ | |
02d9e453 | 1993 | interval = cur_time - client -> first_sending; |
cc26de46 | 1994 | |
34fdad6c TL |
1995 | /* If we're in the INIT-REBOOT or REQUESTING state and we're |
1996 | past the reboot timeout, go to INIT and see if we can | |
1997 | DISCOVER an address... */ | |
1998 | /* XXX In the INIT-REBOOT state, if we don't get an ACK, it | |
1999 | means either that we're on a network with no DHCP server, | |
2000 | or that our server is down. In the latter case, assuming | |
2001 | that there is a backup DHCP server, DHCPDISCOVER will get | |
2002 | us a new address, but we could also have successfully | |
2003 | reused our old address. In the former case, we're hosed | |
2004 | anyway. This is not a win-prone situation. */ | |
02d9e453 TL |
2005 | if ((client -> state == S_REBOOTING || |
2006 | client -> state == S_REQUESTING) && | |
2007 | interval > client -> config -> reboot_timeout) { | |
b8cf055d | 2008 | cancel: |
02d9e453 TL |
2009 | client -> state = S_INIT; |
2010 | cancel_timeout (send_request, client); | |
2011 | state_init (client); | |
deff2d59 TL |
2012 | return; |
2013 | } | |
2014 | ||
b8cf055d TL |
2015 | /* If we're in the reboot state, make sure the media is set up |
2016 | correctly. */ | |
02d9e453 TL |
2017 | if (client -> state == S_REBOOTING && |
2018 | !client -> medium && | |
2019 | client -> active -> medium ) { | |
2020 | script_init (client, "MEDIUM", client -> active -> medium); | |
b8cf055d TL |
2021 | |
2022 | /* If the medium we chose won't fly, go to INIT state. */ | |
02d9e453 | 2023 | if (script_go (client)) |
b8cf055d TL |
2024 | goto cancel; |
2025 | ||
2026 | /* Record the medium. */ | |
02d9e453 | 2027 | client -> medium = client -> active -> medium; |
b8cf055d TL |
2028 | } |
2029 | ||
cc26de46 TL |
2030 | /* If the lease has expired, relinquish the address and go back |
2031 | to the INIT state. */ | |
02d9e453 TL |
2032 | if (client -> state != S_REQUESTING && |
2033 | cur_time > client -> active -> expiry) { | |
cc26de46 | 2034 | /* Run the client script with the new parameters. */ |
02d9e453 TL |
2035 | script_init (client, "EXPIRE", (struct string_list *)0); |
2036 | script_write_params (client, "old_", client -> active); | |
2037 | if (client -> alias) | |
2038 | script_write_params (client, "alias_", | |
2039 | client -> alias); | |
2040 | script_go (client); | |
2041 | ||
62d0cb47 TL |
2042 | /* Now do a preinit on the interface so that we can |
2043 | discover a new address. */ | |
2044 | script_init (client, "PREINIT", (struct string_list *)0); | |
2045 | if (client -> alias) | |
2046 | script_write_params (client, "alias_", | |
2047 | client -> alias); | |
2048 | script_go (client); | |
2049 | ||
02d9e453 TL |
2050 | client -> state = S_INIT; |
2051 | state_init (client); | |
cc26de46 TL |
2052 | return; |
2053 | } | |
2054 | ||
2055 | /* Do the exponential backoff... */ | |
02d9e453 TL |
2056 | if (!client -> interval) |
2057 | client -> interval = client -> config -> initial_interval; | |
34fdad6c | 2058 | else { |
02d9e453 TL |
2059 | client -> interval += ((random () >> 2) % |
2060 | (2 * client -> interval)); | |
34fdad6c | 2061 | } |
3dbe2246 | 2062 | |
34fdad6c | 2063 | /* Don't backoff past cutoff. */ |
02d9e453 TL |
2064 | if (client -> interval > |
2065 | client -> config -> backoff_cutoff) | |
2066 | client -> interval = | |
2067 | ((client -> config -> backoff_cutoff / 2) | |
98311e4b DH |
2068 | + ((random () >> 2) % |
2069 | client -> config -> backoff_cutoff)); | |
cc26de46 TL |
2070 | |
2071 | /* If the backoff would take us to the expiry time, just set the | |
2072 | timeout to the expiry time. */ | |
02d9e453 TL |
2073 | if (client -> state != S_REQUESTING && |
2074 | cur_time + client -> interval > client -> active -> expiry) | |
2075 | client -> interval = | |
2076 | client -> active -> expiry - cur_time + 1; | |
cc26de46 TL |
2077 | |
2078 | /* If the lease T2 time has elapsed, or if we're not yet bound, | |
2079 | broadcast the DHCPREQUEST rather than unicasting. */ | |
02d9e453 | 2080 | if (client -> state == S_REQUESTING || |
62d0cb47 | 2081 | client -> state == S_REBOOTING || |
02d9e453 | 2082 | cur_time > client -> active -> rebind) |
3020a2c1 | 2083 | destination.sin_addr = sockaddr_broadcast.sin_addr; |
cc26de46 TL |
2084 | else |
2085 | memcpy (&destination.sin_addr.s_addr, | |
02d9e453 | 2086 | client -> destination.iabuf, |
cc26de46 TL |
2087 | sizeof destination.sin_addr.s_addr); |
2088 | destination.sin_port = remote_port; | |
b00d3884 TL |
2089 | destination.sin_family = AF_INET; |
2090 | #ifdef HAVE_SA_LEN | |
2091 | destination.sin_len = sizeof destination; | |
2092 | #endif | |
cc26de46 | 2093 | |
7d3bc735 TL |
2094 | if (client -> state == S_RENEWING || |
2095 | client -> state == S_REBINDING) | |
02d9e453 | 2096 | memcpy (&from, client -> active -> address.iabuf, |
cc26de46 TL |
2097 | sizeof from); |
2098 | else | |
2099 | from.s_addr = INADDR_ANY; | |
2100 | ||
34fdad6c | 2101 | /* Record the number of seconds since we started sending. */ |
af6df788 TL |
2102 | if (client -> state == S_REQUESTING) |
2103 | client -> packet.secs = client -> secs; | |
2104 | else { | |
2105 | if (interval < 65536) | |
2106 | client -> packet.secs = htons (interval); | |
2107 | else | |
2108 | client -> packet.secs = htons (65535); | |
2109 | } | |
34fdad6c | 2110 | |
8ae2d595 | 2111 | log_info ("DHCPREQUEST on %s to %s port %d", |
02d9e453 | 2112 | client -> name ? client -> name : client -> interface -> name, |
cc26de46 TL |
2113 | inet_ntoa (destination.sin_addr), |
2114 | ntohs (destination.sin_port)); | |
2115 | ||
62d0cb47 TL |
2116 | if (destination.sin_addr.s_addr != INADDR_BROADCAST && |
2117 | fallback_interface) | |
2118 | result = send_packet (fallback_interface, | |
2119 | (struct packet *)0, | |
2120 | &client -> packet, | |
2121 | client -> packet_length, | |
2122 | from, &destination, | |
2123 | (struct hardware *)0); | |
cc26de46 | 2124 | else |
cc26de46 | 2125 | /* Send out a packet. */ |
02d9e453 TL |
2126 | result = send_packet (client -> interface, (struct packet *)0, |
2127 | &client -> packet, | |
2128 | client -> packet_length, | |
cc26de46 TL |
2129 | from, &destination, |
2130 | (struct hardware *)0); | |
469cf3a4 | 2131 | |
be62cf06 FD |
2132 | tv . tv_sec = cur_time + client -> interval; |
2133 | tv . tv_usec = 0; | |
2134 | add_timeout (&tv, send_request, client, 0, 0); | |
469cf3a4 TL |
2135 | } |
2136 | ||
02d9e453 TL |
2137 | void send_decline (cpp) |
2138 | void *cpp; | |
b00d3884 | 2139 | { |
02d9e453 | 2140 | struct client_state *client = cpp; |
84c4adde | 2141 | |
b00d3884 TL |
2142 | int result; |
2143 | ||
8ae2d595 | 2144 | log_info ("DHCPDECLINE on %s to %s port %d", |
02d9e453 | 2145 | client -> name ? client -> name : client -> interface -> name, |
b00d3884 TL |
2146 | inet_ntoa (sockaddr_broadcast.sin_addr), |
2147 | ntohs (sockaddr_broadcast.sin_port)); | |
2148 | ||
2149 | /* Send out a packet. */ | |
02d9e453 TL |
2150 | result = send_packet (client -> interface, (struct packet *)0, |
2151 | &client -> packet, | |
2152 | client -> packet_length, | |
b00d3884 TL |
2153 | inaddr_any, &sockaddr_broadcast, |
2154 | (struct hardware *)0); | |
b00d3884 TL |
2155 | } |
2156 | ||
02d9e453 TL |
2157 | void send_release (cpp) |
2158 | void *cpp; | |
b00d3884 | 2159 | { |
02d9e453 | 2160 | struct client_state *client = cpp; |
84c4adde | 2161 | |
b00d3884 | 2162 | int result; |
007e3ee4 TL |
2163 | struct sockaddr_in destination; |
2164 | struct in_addr from; | |
2165 | ||
2166 | memcpy (&from, client -> active -> address.iabuf, | |
2167 | sizeof from); | |
2168 | memcpy (&destination.sin_addr.s_addr, | |
2169 | client -> destination.iabuf, | |
2170 | sizeof destination.sin_addr.s_addr); | |
2171 | destination.sin_port = remote_port; | |
2172 | destination.sin_family = AF_INET; | |
2173 | #ifdef HAVE_SA_LEN | |
2174 | destination.sin_len = sizeof destination; | |
2175 | #endif | |
2176 | ||
007e3ee4 TL |
2177 | /* Set the lease to end now, so that we don't accidentally |
2178 | reuse it if we restart before the old expiry time. */ | |
2179 | client -> active -> expiry = | |
2180 | client -> active -> renewal = | |
2181 | client -> active -> rebind = cur_time; | |
2182 | if (!write_client_lease (client, client -> active, 1, 1)) { | |
2183 | log_error ("Can't release lease: lease write failed."); | |
2184 | return; | |
2185 | } | |
b00d3884 | 2186 | |
8ae2d595 | 2187 | log_info ("DHCPRELEASE on %s to %s port %d", |
02d9e453 | 2188 | client -> name ? client -> name : client -> interface -> name, |
007e3ee4 TL |
2189 | inet_ntoa (destination.sin_addr), |
2190 | ntohs (destination.sin_port)); | |
b00d3884 | 2191 | |
007e3ee4 TL |
2192 | if (fallback_interface) |
2193 | result = send_packet (fallback_interface, | |
2194 | (struct packet *)0, | |
2195 | &client -> packet, | |
2196 | client -> packet_length, | |
2197 | from, &destination, | |
2198 | (struct hardware *)0); | |
2199 | else | |
2200 | /* Send out a packet. */ | |
2201 | result = send_packet (client -> interface, (struct packet *)0, | |
2202 | &client -> packet, | |
2203 | client -> packet_length, | |
2204 | from, &destination, | |
2205 | (struct hardware *)0); | |
b00d3884 TL |
2206 | } |
2207 | ||
0c20eab3 DH |
2208 | void |
2209 | make_client_options(struct client_state *client, struct client_lease *lease, | |
2210 | u_int8_t *type, struct option_cache *sid, | |
2211 | struct iaddr *rip, struct option **prl, | |
2212 | struct option_state **op) | |
469cf3a4 | 2213 | { |
b1b7b521 | 2214 | unsigned i; |
02a015fb | 2215 | struct option_cache *oc; |
f7fdb216 | 2216 | struct option *option = NULL; |
02a015fb TL |
2217 | struct buffer *bp = (struct buffer *)0; |
2218 | ||
d758ad8c TL |
2219 | /* If there are any leftover options, get rid of them. */ |
2220 | if (*op) | |
2221 | option_state_dereference (op, MDL); | |
2222 | ||
230e73e4 | 2223 | /* Allocate space for options. */ |
cf78bf20 | 2224 | option_state_allocate (op, MDL); |
02a015fb TL |
2225 | |
2226 | /* Send the server identifier if provided. */ | |
2227 | if (sid) | |
230e73e4 | 2228 | save_option (&dhcp_universe, *op, sid); |
02a015fb | 2229 | |
2455808f TL |
2230 | oc = (struct option_cache *)0; |
2231 | ||
02a015fb TL |
2232 | /* Send the requested address if provided. */ |
2233 | if (rip) { | |
02d9e453 | 2234 | client -> requested_address = *rip; |
f7fdb216 DH |
2235 | i = DHO_DHCP_REQUESTED_ADDRESS; |
2236 | if (!(option_code_hash_lookup(&option, dhcp_universe.code_hash, | |
2237 | &i, 0, MDL) && | |
2238 | make_const_option_cache(&oc, NULL, rip->iabuf, rip->len, | |
2239 | option, MDL))) | |
230e73e4 | 2240 | log_error ("can't make requested address cache."); |
02a015fb | 2241 | else { |
230e73e4 | 2242 | save_option (&dhcp_universe, *op, oc); |
cf78bf20 | 2243 | option_cache_dereference (&oc, MDL); |
02a015fb | 2244 | } |
f7fdb216 | 2245 | option_dereference(&option, MDL); |
b00d3884 | 2246 | } else { |
02d9e453 | 2247 | client -> requested_address.len = 0; |
cc26de46 | 2248 | } |
c1503c57 | 2249 | |
f7fdb216 DH |
2250 | i = DHO_DHCP_MESSAGE_TYPE; |
2251 | if (!(option_code_hash_lookup(&option, dhcp_universe.code_hash, &i, 0, | |
2252 | MDL) && | |
2253 | make_const_option_cache(&oc, NULL, type, 1, option, MDL))) | |
8ae2d595 | 2254 | log_error ("can't make message type."); |
02a015fb | 2255 | else { |
230e73e4 | 2256 | save_option (&dhcp_universe, *op, oc); |
cf78bf20 | 2257 | option_cache_dereference (&oc, MDL); |
02a015fb | 2258 | } |
f7fdb216 | 2259 | option_dereference(&option, MDL); |
02a015fb TL |
2260 | |
2261 | if (prl) { | |
0c20eab3 DH |
2262 | int len; |
2263 | ||
2264 | /* Probe the length of the list. */ | |
2265 | len = 0; | |
2266 | for (i = 0 ; prl[i] != NULL ; i++) | |
2267 | if (prl[i]->universe == &dhcp_universe) | |
2268 | len++; | |
2269 | ||
2270 | if (!buffer_allocate (&bp, len, MDL)) | |
230e73e4 | 2271 | log_error ("can't make parameter list buffer."); |
02a015fb | 2272 | else { |
d6614ea2 DH |
2273 | unsigned code = DHO_DHCP_PARAMETER_REQUEST_LIST; |
2274 | ||
0c20eab3 DH |
2275 | len = 0; |
2276 | for (i = 0 ; prl[i] != NULL ; i++) | |
2277 | if (prl[i]->universe == &dhcp_universe) | |
2278 | bp->data[len++] = prl[i]->code; | |
2279 | ||
f7fdb216 DH |
2280 | if (!(option_code_hash_lookup(&option, |
2281 | dhcp_universe.code_hash, | |
d6614ea2 | 2282 | &code, 0, MDL) && |
0c20eab3 | 2283 | make_const_option_cache(&oc, &bp, NULL, len, |
f7fdb216 | 2284 | option, MDL))) |
8ae2d595 | 2285 | log_error ("can't make option cache"); |
02a015fb | 2286 | else { |
230e73e4 | 2287 | save_option (&dhcp_universe, *op, oc); |
cf78bf20 | 2288 | option_cache_dereference (&oc, MDL); |
02a015fb | 2289 | } |
f7fdb216 | 2290 | option_dereference(&option, MDL); |
deff2d59 TL |
2291 | } |
2292 | } | |
2293 | ||
02a015fb | 2294 | /* Run statements that need to be run on transmission. */ |
73530742 TL |
2295 | if (client -> config -> on_transmission) |
2296 | execute_statements_in_scope | |
1b234d44 | 2297 | ((struct binding_value **)0, |
66e9cecf | 2298 | (struct packet *)0, (struct lease *)0, client, |
da38df14 | 2299 | (lease ? lease -> options : (struct option_state *)0), |
cf78bf20 TL |
2300 | *op, &global_scope, |
2301 | client -> config -> on_transmission, | |
73530742 | 2302 | (struct group *)0); |
02a015fb TL |
2303 | } |
2304 | ||
02d9e453 TL |
2305 | void make_discover (client, lease) |
2306 | struct client_state *client; | |
02a015fb TL |
2307 | struct client_lease *lease; |
2308 | { | |
02a015fb | 2309 | unsigned char discover = DHCPDISCOVER; |
230e73e4 | 2310 | struct option_state *options = (struct option_state *)0; |
02a015fb | 2311 | |
02d9e453 | 2312 | memset (&client -> packet, 0, sizeof (client -> packet)); |
02a015fb | 2313 | |
02d9e453 TL |
2314 | make_client_options (client, |
2315 | lease, &discover, (struct option_cache *)0, | |
02a015fb | 2316 | lease ? &lease -> address : (struct iaddr *)0, |
02d9e453 | 2317 | client -> config -> requested_options, |
02a015fb TL |
2318 | &options); |
2319 | ||
c1503c57 | 2320 | /* Set up the option buffer... */ |
02d9e453 | 2321 | client -> packet_length = |
da38df14 | 2322 | cons_options ((struct packet *)0, &client -> packet, |
98311e4b DH |
2323 | (struct lease *)0, client, |
2324 | /* maximum packet size */1500, | |
2325 | (struct option_state *)0, | |
2326 | options, | |
2327 | /* scope */ &global_scope, | |
2328 | /* overload */ 0, | |
2329 | /* terminate */0, | |
2330 | /* bootpp */0, | |
2331 | (struct data_string *)0, | |
ce75142f | 2332 | client -> config -> vendor_space_name); |
98311e4b DH |
2333 | |
2334 | option_state_dereference (&options, MDL); | |
02d9e453 TL |
2335 | if (client -> packet_length < BOOTP_MIN_LEN) |
2336 | client -> packet_length = BOOTP_MIN_LEN; | |
2337 | ||
2338 | client -> packet.op = BOOTREQUEST; | |
31730f17 TL |
2339 | client -> packet.htype = client -> interface -> hw_address.hbuf [0]; |
2340 | client -> packet.hlen = client -> interface -> hw_address.hlen - 1; | |
02d9e453 TL |
2341 | client -> packet.hops = 0; |
2342 | client -> packet.xid = random (); | |
2343 | client -> packet.secs = 0; /* filled in by send_discover. */ | |
f345b36d TL |
2344 | |
2345 | if (can_receive_unicast_unconfigured (client -> interface)) | |
2346 | client -> packet.flags = 0; | |
2347 | else | |
2348 | client -> packet.flags = htons (BOOTP_BROADCAST); | |
2349 | ||
02d9e453 TL |
2350 | memset (&(client -> packet.ciaddr), |
2351 | 0, sizeof client -> packet.ciaddr); | |
2352 | memset (&(client -> packet.yiaddr), | |
2353 | 0, sizeof client -> packet.yiaddr); | |
2354 | memset (&(client -> packet.siaddr), | |
2355 | 0, sizeof client -> packet.siaddr); | |
11373fb6 | 2356 | client -> packet.giaddr = giaddr; |
31730f17 TL |
2357 | if (client -> interface -> hw_address.hlen > 0) |
2358 | memcpy (client -> packet.chaddr, | |
2359 | &client -> interface -> hw_address.hbuf [1], | |
2360 | (unsigned)(client -> interface -> hw_address.hlen - 1)); | |
c1503c57 TL |
2361 | |
2362 | #ifdef DEBUG_PACKET | |
01aeb18a | 2363 | dump_raw ((unsigned char *)&client -> packet, client -> packet_length); |
c1503c57 | 2364 | #endif |
c1503c57 TL |
2365 | } |
2366 | ||
469cf3a4 | 2367 | |
02d9e453 TL |
2368 | void make_request (client, lease) |
2369 | struct client_state *client; | |
cc26de46 | 2370 | struct client_lease *lease; |
c1503c57 | 2371 | { |
c1503c57 | 2372 | unsigned char request = DHCPREQUEST; |
02a015fb | 2373 | struct option_cache *oc; |
c1503c57 | 2374 | |
02d9e453 | 2375 | memset (&client -> packet, 0, sizeof (client -> packet)); |
469cf3a4 | 2376 | |
02d9e453 | 2377 | if (client -> state == S_REQUESTING) |
230e73e4 | 2378 | oc = lookup_option (&dhcp_universe, lease -> options, |
02a015fb TL |
2379 | DHO_DHCP_SERVER_IDENTIFIER); |
2380 | else | |
2381 | oc = (struct option_cache *)0; | |
8dba80a6 | 2382 | |
98311e4b DH |
2383 | if (client -> sent_options) |
2384 | option_state_dereference (&client -> sent_options, MDL); | |
2385 | ||
02d9e453 TL |
2386 | make_client_options (client, lease, &request, oc, |
2387 | ((client -> state == S_REQUESTING || | |
2388 | client -> state == S_REBOOTING) | |
02a015fb TL |
2389 | ? &lease -> address |
2390 | : (struct iaddr *)0), | |
02d9e453 | 2391 | client -> config -> requested_options, |
d758ad8c | 2392 | &client -> sent_options); |
deff2d59 | 2393 | |
c1503c57 | 2394 | /* Set up the option buffer... */ |
02d9e453 | 2395 | client -> packet_length = |
da38df14 | 2396 | cons_options ((struct packet *)0, &client -> packet, |
98311e4b DH |
2397 | (struct lease *)0, client, |
2398 | /* maximum packet size */1500, | |
2399 | (struct option_state *)0, | |
3dbe2246 | 2400 | client -> sent_options, |
98311e4b DH |
2401 | /* scope */ &global_scope, |
2402 | /* overload */ 0, | |
2403 | /* terminate */0, | |
2404 | /* bootpp */0, | |
2405 | (struct data_string *)0, | |
ce75142f | 2406 | client -> config -> vendor_space_name); |
98311e4b | 2407 | |
02d9e453 TL |
2408 | if (client -> packet_length < BOOTP_MIN_LEN) |
2409 | client -> packet_length = BOOTP_MIN_LEN; | |
cc26de46 | 2410 | |
02d9e453 | 2411 | client -> packet.op = BOOTREQUEST; |
31730f17 TL |
2412 | client -> packet.htype = client -> interface -> hw_address.hbuf [0]; |
2413 | client -> packet.hlen = client -> interface -> hw_address.hlen - 1; | |
02d9e453 TL |
2414 | client -> packet.hops = 0; |
2415 | client -> packet.xid = client -> xid; | |
2416 | client -> packet.secs = 0; /* Filled in by send_request. */ | |
cc26de46 TL |
2417 | |
2418 | /* If we own the address we're requesting, put it in ciaddr; | |
2419 | otherwise set ciaddr to zero. */ | |
02d9e453 TL |
2420 | if (client -> state == S_BOUND || |
2421 | client -> state == S_RENEWING || | |
62d0cb47 | 2422 | client -> state == S_REBINDING) { |
02d9e453 | 2423 | memcpy (&client -> packet.ciaddr, |
cc26de46 | 2424 | lease -> address.iabuf, lease -> address.len); |
339b0231 | 2425 | client -> packet.flags = 0; |
62d0cb47 | 2426 | } else { |
02d9e453 TL |
2427 | memset (&client -> packet.ciaddr, 0, |
2428 | sizeof client -> packet.ciaddr); | |
f345b36d TL |
2429 | if (can_receive_unicast_unconfigured (client -> interface)) |
2430 | client -> packet.flags = 0; | |
2431 | else | |
2432 | client -> packet.flags = htons (BOOTP_BROADCAST); | |
62d0cb47 | 2433 | } |
02d9e453 TL |
2434 | |
2435 | memset (&client -> packet.yiaddr, 0, | |
2436 | sizeof client -> packet.yiaddr); | |
2437 | memset (&client -> packet.siaddr, 0, | |
2438 | sizeof client -> packet.siaddr); | |
1c44f6bd TL |
2439 | if (client -> state != S_BOUND && |
2440 | client -> state != S_RENEWING) | |
2441 | client -> packet.giaddr = giaddr; | |
2442 | else | |
2443 | memset (&client -> packet.giaddr, 0, | |
2444 | sizeof client -> packet.giaddr); | |
31730f17 TL |
2445 | if (client -> interface -> hw_address.hlen > 0) |
2446 | memcpy (client -> packet.chaddr, | |
2447 | &client -> interface -> hw_address.hbuf [1], | |
2448 | (unsigned)(client -> interface -> hw_address.hlen - 1)); | |
c1503c57 TL |
2449 | |
2450 | #ifdef DEBUG_PACKET | |
01aeb18a | 2451 | dump_raw ((unsigned char *)&client -> packet, client -> packet_length); |
c1503c57 | 2452 | #endif |
469cf3a4 | 2453 | } |
c1503c57 | 2454 | |
02d9e453 TL |
2455 | void make_decline (client, lease) |
2456 | struct client_state *client; | |
cc26de46 | 2457 | struct client_lease *lease; |
469cf3a4 | 2458 | { |
cc26de46 | 2459 | unsigned char decline = DHCPDECLINE; |
02a015fb | 2460 | struct option_cache *oc; |
c1503c57 | 2461 | |
230e73e4 | 2462 | struct option_state *options = (struct option_state *)0; |
c1503c57 | 2463 | |
40ec5f38 | 2464 | /* Create the options cache. */ |
230e73e4 | 2465 | oc = lookup_option (&dhcp_universe, lease -> options, |
02a015fb | 2466 | DHO_DHCP_SERVER_IDENTIFIER); |
0c20eab3 DH |
2467 | make_client_options(client, lease, &decline, oc, &lease->address, |
2468 | NULL, &options); | |
ca25f4ab | 2469 | |
40ec5f38 | 2470 | /* Consume the options cache into the option buffer. */ |
230e73e4 | 2471 | memset (&client -> packet, 0, sizeof (client -> packet)); |
02d9e453 | 2472 | client -> packet_length = |
da38df14 | 2473 | cons_options ((struct packet *)0, &client -> packet, |
66e9cecf | 2474 | (struct lease *)0, client, 0, |
0852a27f | 2475 | (struct option_state *)0, options, |
ce75142f TL |
2476 | &global_scope, 0, 0, 0, (struct data_string *)0, |
2477 | client -> config -> vendor_space_name); | |
40ec5f38 DH |
2478 | |
2479 | /* Destroy the options cache. */ | |
98311e4b | 2480 | option_state_dereference (&options, MDL); |
40ec5f38 | 2481 | |
02d9e453 TL |
2482 | if (client -> packet_length < BOOTP_MIN_LEN) |
2483 | client -> packet_length = BOOTP_MIN_LEN; | |
cc26de46 | 2484 | |
02d9e453 | 2485 | client -> packet.op = BOOTREQUEST; |
31730f17 TL |
2486 | client -> packet.htype = client -> interface -> hw_address.hbuf [0]; |
2487 | client -> packet.hlen = client -> interface -> hw_address.hlen - 1; | |
02d9e453 TL |
2488 | client -> packet.hops = 0; |
2489 | client -> packet.xid = client -> xid; | |
2490 | client -> packet.secs = 0; /* Filled in by send_request. */ | |
7d3bc735 TL |
2491 | if (can_receive_unicast_unconfigured (client -> interface)) |
2492 | client -> packet.flags = 0; | |
2493 | else | |
2494 | client -> packet.flags = htons (BOOTP_BROADCAST); | |
cc26de46 TL |
2495 | |
2496 | /* ciaddr must always be zero. */ | |
02d9e453 TL |
2497 | memset (&client -> packet.ciaddr, 0, |
2498 | sizeof client -> packet.ciaddr); | |
2499 | memset (&client -> packet.yiaddr, 0, | |
2500 | sizeof client -> packet.yiaddr); | |
2501 | memset (&client -> packet.siaddr, 0, | |
2502 | sizeof client -> packet.siaddr); | |
11373fb6 | 2503 | client -> packet.giaddr = giaddr; |
02d9e453 | 2504 | memcpy (client -> packet.chaddr, |
31730f17 | 2505 | &client -> interface -> hw_address.hbuf [1], |
02d9e453 | 2506 | client -> interface -> hw_address.hlen); |
cc26de46 TL |
2507 | |
2508 | #ifdef DEBUG_PACKET | |
01aeb18a | 2509 | dump_raw ((unsigned char *)&client -> packet, client -> packet_length); |
cc26de46 TL |
2510 | #endif |
2511 | } | |
2512 | ||
02d9e453 TL |
2513 | void make_release (client, lease) |
2514 | struct client_state *client; | |
cc26de46 TL |
2515 | struct client_lease *lease; |
2516 | { | |
2517 | unsigned char request = DHCPRELEASE; | |
02a015fb | 2518 | struct option_cache *oc; |
cc26de46 | 2519 | |
230e73e4 | 2520 | struct option_state *options = (struct option_state *)0; |
cc26de46 | 2521 | |
02d9e453 | 2522 | memset (&client -> packet, 0, sizeof (client -> packet)); |
469cf3a4 | 2523 | |
230e73e4 | 2524 | oc = lookup_option (&dhcp_universe, lease -> options, |
02a015fb | 2525 | DHO_DHCP_SERVER_IDENTIFIER); |
0c20eab3 | 2526 | make_client_options(client, lease, &request, oc, NULL, NULL, &options); |
469cf3a4 TL |
2527 | |
2528 | /* Set up the option buffer... */ | |
02d9e453 | 2529 | client -> packet_length = |
da38df14 | 2530 | cons_options ((struct packet *)0, &client -> packet, |
98311e4b DH |
2531 | (struct lease *)0, client, |
2532 | /* maximum packet size */1500, | |
2533 | (struct option_state *)0, | |
2534 | options, | |
2535 | /* scope */ &global_scope, | |
2536 | /* overload */ 0, | |
2537 | /* terminate */0, | |
2538 | /* bootpp */0, | |
2539 | (struct data_string *)0, | |
ce75142f | 2540 | client -> config -> vendor_space_name); |
98311e4b | 2541 | |
02d9e453 TL |
2542 | if (client -> packet_length < BOOTP_MIN_LEN) |
2543 | client -> packet_length = BOOTP_MIN_LEN; | |
cf78bf20 | 2544 | option_state_dereference (&options, MDL); |
02d9e453 TL |
2545 | |
2546 | client -> packet.op = BOOTREQUEST; | |
31730f17 TL |
2547 | client -> packet.htype = client -> interface -> hw_address.hbuf [0]; |
2548 | client -> packet.hlen = client -> interface -> hw_address.hlen - 1; | |
02d9e453 | 2549 | client -> packet.hops = 0; |
74f45f96 | 2550 | client -> packet.xid = random (); |
02d9e453 TL |
2551 | client -> packet.secs = 0; |
2552 | client -> packet.flags = 0; | |
2553 | memcpy (&client -> packet.ciaddr, | |
cc26de46 | 2554 | lease -> address.iabuf, lease -> address.len); |
02d9e453 TL |
2555 | memset (&client -> packet.yiaddr, 0, |
2556 | sizeof client -> packet.yiaddr); | |
2557 | memset (&client -> packet.siaddr, 0, | |
2558 | sizeof client -> packet.siaddr); | |
11373fb6 | 2559 | client -> packet.giaddr = giaddr; |
02d9e453 | 2560 | memcpy (client -> packet.chaddr, |
bdcaf7b9 | 2561 | &client -> interface -> hw_address.hbuf [1], |
02d9e453 | 2562 | client -> interface -> hw_address.hlen); |
469cf3a4 TL |
2563 | |
2564 | #ifdef DEBUG_PACKET | |
01aeb18a | 2565 | dump_raw ((unsigned char *)&client -> packet, client -> packet_length); |
469cf3a4 | 2566 | #endif |
e581d615 | 2567 | } |
cc26de46 | 2568 | |
02a015fb | 2569 | void destroy_client_lease (lease) |
cc26de46 TL |
2570 | struct client_lease *lease; |
2571 | { | |
cc26de46 | 2572 | if (lease -> server_name) |
cf78bf20 | 2573 | dfree (lease -> server_name, MDL); |
cc26de46 | 2574 | if (lease -> filename) |
cf78bf20 TL |
2575 | dfree (lease -> filename, MDL); |
2576 | option_state_dereference (&lease -> options, MDL); | |
2577 | free_client_lease (lease, MDL); | |
cc26de46 TL |
2578 | } |
2579 | ||
98bd7ca0 DH |
2580 | FILE *leaseFile = NULL; |
2581 | int leases_written = 0; | |
cc26de46 TL |
2582 | |
2583 | void rewrite_client_leases () | |
2584 | { | |
2585 | struct interface_info *ip; | |
02d9e453 | 2586 | struct client_state *client; |
cc26de46 TL |
2587 | struct client_lease *lp; |
2588 | ||
98bd7ca0 | 2589 | if (leaseFile != NULL) |
cc26de46 TL |
2590 | fclose (leaseFile); |
2591 | leaseFile = fopen (path_dhclient_db, "w"); | |
98bd7ca0 | 2592 | if (leaseFile == NULL) { |
ee8a3653 TL |
2593 | log_error ("can't create %s: %m", path_dhclient_db); |
2594 | return; | |
2595 | } | |
b00d3884 | 2596 | |
98bd7ca0 DH |
2597 | /* If there is a default duid, write it out. */ |
2598 | if (default_duid.len != 0) | |
2599 | write_duid(&default_duid); | |
2600 | ||
b00d3884 TL |
2601 | /* Write out all the leases attached to configured interfaces that |
2602 | we know about. */ | |
cc26de46 | 2603 | for (ip = interfaces; ip; ip = ip -> next) { |
02d9e453 TL |
2604 | for (client = ip -> client; client; client = client -> next) { |
2605 | for (lp = client -> leases; lp; lp = lp -> next) { | |
007e3ee4 | 2606 | write_client_lease (client, lp, 1, 0); |
02d9e453 TL |
2607 | } |
2608 | if (client -> active) | |
2609 | write_client_lease (client, | |
007e3ee4 | 2610 | client -> active, 1, 0); |
98bd7ca0 DH |
2611 | |
2612 | if (client->active_lease != NULL) | |
2613 | write_client6_lease(client, | |
2614 | client->active_lease, | |
2615 | 1, 0); | |
cc26de46 | 2616 | } |
cc26de46 | 2617 | } |
b00d3884 TL |
2618 | |
2619 | /* Write out any leases that are attached to interfaces that aren't | |
2620 | currently configured. */ | |
2621 | for (ip = dummy_interfaces; ip; ip = ip -> next) { | |
02d9e453 TL |
2622 | for (client = ip -> client; client; client = client -> next) { |
2623 | for (lp = client -> leases; lp; lp = lp -> next) { | |
007e3ee4 | 2624 | write_client_lease (client, lp, 1, 0); |
02d9e453 TL |
2625 | } |
2626 | if (client -> active) | |
2627 | write_client_lease (client, | |
007e3ee4 | 2628 | client -> active, 1, 0); |
98bd7ca0 DH |
2629 | |
2630 | if (client->active_lease != NULL) | |
2631 | write_client6_lease(client, | |
2632 | client->active_lease, | |
2633 | 1, 0); | |
b00d3884 | 2634 | } |
b00d3884 | 2635 | } |
cc26de46 TL |
2636 | fflush (leaseFile); |
2637 | } | |
2638 | ||
c0504523 TL |
2639 | void write_lease_option (struct option_cache *oc, |
2640 | struct packet *packet, struct lease *lease, | |
66e9cecf | 2641 | struct client_state *client_state, |
c0504523 TL |
2642 | struct option_state *in_options, |
2643 | struct option_state *cfg_options, | |
2644 | struct binding_scope **scope, | |
2645 | struct universe *u, void *stuff) | |
2646 | { | |
2647 | const char *name, *dot; | |
2648 | struct data_string ds; | |
98bd7ca0 | 2649 | char *preamble = stuff; |
b5f904a9 | 2650 | |
c0504523 TL |
2651 | memset (&ds, 0, sizeof ds); |
2652 | ||
2653 | if (u != &dhcp_universe) { | |
2654 | name = u -> name; | |
2655 | dot = "."; | |
2656 | } else { | |
2657 | name = ""; | |
2658 | dot = ""; | |
2659 | } | |
66e9cecf | 2660 | if (evaluate_option_cache (&ds, packet, lease, client_state, |
c0504523 | 2661 | in_options, cfg_options, scope, oc, MDL)) { |
98bd7ca0 DH |
2662 | fprintf(leaseFile, "%soption %s%s%s %s;\n", preamble, |
2663 | name, dot, oc->option->name, | |
2664 | pretty_print_option(oc->option, ds.data, ds.len, | |
2665 | 1, 1)); | |
c0504523 TL |
2666 | data_string_forget (&ds, MDL); |
2667 | } | |
2668 | } | |
2669 | ||
98bd7ca0 DH |
2670 | /* Write an option cache to the lease store. */ |
2671 | static void | |
2672 | write_options(struct client_state *client, struct option_state *options, | |
06eb8bab | 2673 | const char *preamble) |
98bd7ca0 DH |
2674 | { |
2675 | int i; | |
2676 | ||
2677 | for (i = 0; i < options->universe_count; i++) { | |
2678 | option_space_foreach(NULL, NULL, client, NULL, options, | |
3dbe2246 | 2679 | &global_scope, universes[i], |
06eb8bab | 2680 | (char *)preamble, write_lease_option); |
98bd7ca0 DH |
2681 | } |
2682 | } | |
2683 | ||
2684 | /* Write the default DUID to the lease store. */ | |
2685 | static isc_result_t | |
2686 | write_duid(struct data_string *duid) | |
2687 | { | |
2688 | char *str; | |
2689 | int stat; | |
2690 | ||
2691 | if ((duid == NULL) || (duid->len <= 2)) | |
98bf1607 | 2692 | return DHCP_R_INVALIDARG; |
98bd7ca0 DH |
2693 | |
2694 | if (leaseFile == NULL) { /* XXX? */ | |
2695 | leaseFile = fopen(path_dhclient_db, "w"); | |
2696 | if (leaseFile == NULL) { | |
2697 | log_error("can't create %s: %m", path_dhclient_db); | |
2698 | return ISC_R_IOERROR; | |
2699 | } | |
2700 | } | |
2701 | ||
2702 | /* It would make more sense to write this as a hex string, | |
2703 | * but our function to do that (print_hex_n) uses a fixed | |
2704 | * length buffer...and we can't guarantee a duid would be | |
2705 | * less than the fixed length. | |
2706 | */ | |
2707 | str = quotify_buf(duid->data, duid->len, MDL); | |
2708 | if (str == NULL) | |
2709 | return ISC_R_NOMEMORY; | |
2710 | ||
2711 | stat = fprintf(leaseFile, "default-duid \"%s\";\n", str); | |
2712 | dfree(str, MDL); | |
2713 | if (stat <= 0) | |
2714 | return ISC_R_IOERROR; | |
2715 | ||
2716 | if (fflush(leaseFile) != 0) | |
2717 | return ISC_R_IOERROR; | |
6705543f DH |
2718 | |
2719 | return ISC_R_SUCCESS; | |
98bd7ca0 DH |
2720 | } |
2721 | ||
2722 | /* Write a DHCPv6 lease to the store. */ | |
2723 | isc_result_t | |
2724 | write_client6_lease(struct client_state *client, struct dhc6_lease *lease, | |
2725 | int rewrite, int sync) | |
2726 | { | |
2727 | struct dhc6_ia *ia; | |
2728 | struct dhc6_addr *addr; | |
2729 | int stat; | |
1d9774ab | 2730 | const char *ianame; |
98bd7ca0 DH |
2731 | |
2732 | /* This should include the current lease. */ | |
2733 | if (!rewrite && (leases_written++ > 20)) { | |
2734 | rewrite_client_leases(); | |
2735 | leases_written = 0; | |
2736 | return ISC_R_SUCCESS; | |
2737 | } | |
2738 | ||
2739 | if (client == NULL || lease == NULL) | |
98bf1607 | 2740 | return DHCP_R_INVALIDARG; |
98bd7ca0 DH |
2741 | |
2742 | if (leaseFile == NULL) { /* XXX? */ | |
2743 | leaseFile = fopen(path_dhclient_db, "w"); | |
2744 | if (leaseFile == NULL) { | |
2745 | log_error("can't create %s: %m", path_dhclient_db); | |
2746 | return ISC_R_IOERROR; | |
2747 | } | |
2748 | } | |
2749 | ||
2750 | stat = fprintf(leaseFile, "lease6 {\n"); | |
2751 | if (stat <= 0) | |
2752 | return ISC_R_IOERROR; | |
2753 | ||
2754 | stat = fprintf(leaseFile, " interface \"%s\";\n", | |
2755 | client->interface->name); | |
2756 | if (stat <= 0) | |
2757 | return ISC_R_IOERROR; | |
2758 | ||
2759 | for (ia = lease->bindings ; ia != NULL ; ia = ia->next) { | |
1d9774ab FD |
2760 | switch (ia->ia_type) { |
2761 | case D6O_IA_NA: | |
2762 | default: | |
2763 | ianame = "ia-na"; | |
2764 | break; | |
2765 | case D6O_IA_TA: | |
2766 | ianame = "ia-ta"; | |
2767 | break; | |
2768 | case D6O_IA_PD: | |
2769 | ianame = "ia-pd"; | |
2770 | break; | |
2771 | } | |
2772 | stat = fprintf(leaseFile, " %s %s {\n", | |
2773 | ianame, print_hex_1(4, ia->iaid, 12)); | |
98bd7ca0 DH |
2774 | if (stat <= 0) |
2775 | return ISC_R_IOERROR; | |
2776 | ||
1d9774ab FD |
2777 | if (ia->ia_type != D6O_IA_TA) |
2778 | stat = fprintf(leaseFile, " starts %d;\n" | |
2779 | " renew %u;\n" | |
2780 | " rebind %u;\n", | |
2781 | (int)ia->starts, ia->renew, ia->rebind); | |
2782 | else | |
2783 | stat = fprintf(leaseFile, " starts %d;\n", | |
2784 | (int)ia->starts); | |
98bd7ca0 DH |
2785 | if (stat <= 0) |
2786 | return ISC_R_IOERROR; | |
2787 | ||
2788 | for (addr = ia->addrs ; addr != NULL ; addr = addr->next) { | |
1d9774ab FD |
2789 | if (ia->ia_type != D6O_IA_PD) |
2790 | stat = fprintf(leaseFile, | |
2791 | " iaaddr %s {\n", | |
2792 | piaddr(addr->address)); | |
2793 | else | |
2794 | stat = fprintf(leaseFile, | |
2795 | " iaprefix %s/%d {\n", | |
2796 | piaddr(addr->address), | |
2797 | (int)addr->plen); | |
98bd7ca0 DH |
2798 | if (stat <= 0) |
2799 | return ISC_R_IOERROR; | |
2800 | ||
2801 | stat = fprintf(leaseFile, " starts %d;\n" | |
2802 | " preferred-life %u;\n" | |
2803 | " max-life %u;\n", | |
6705543f | 2804 | (int)addr->starts, addr->preferred_life, |
98bd7ca0 DH |
2805 | addr->max_life); |
2806 | if (stat <= 0) | |
2807 | return ISC_R_IOERROR; | |
2808 | ||
2809 | if (addr->options != NULL) | |
2810 | write_options(client, addr->options, " "); | |
2811 | ||
2812 | stat = fprintf(leaseFile, " }\n"); | |
2813 | if (stat <= 0) | |
2814 | return ISC_R_IOERROR; | |
2815 | } | |
2816 | ||
2817 | if (ia->options != NULL) | |
2818 | write_options(client, ia->options, " "); | |
2819 | ||
2820 | stat = fprintf(leaseFile, " }\n"); | |
2821 | if (stat <= 0) | |
2822 | return ISC_R_IOERROR; | |
2823 | } | |
2824 | ||
cabdb9b1 FD |
2825 | if (lease->released) { |
2826 | stat = fprintf(leaseFile, " released;\n"); | |
2827 | if (stat <= 0) | |
2828 | return ISC_R_IOERROR; | |
2829 | } | |
2830 | ||
98bd7ca0 DH |
2831 | if (lease->options != NULL) |
2832 | write_options(client, lease->options, " "); | |
2833 | ||
2834 | stat = fprintf(leaseFile, "}\n"); | |
2835 | if (stat <= 0) | |
2836 | return ISC_R_IOERROR; | |
2837 | ||
2838 | if (fflush(leaseFile) != 0) | |
2839 | return ISC_R_IOERROR; | |
2840 | ||
2841 | if (sync) { | |
2842 | if (fsync(fileno(leaseFile)) < 0) { | |
2843 | log_error("write_client_lease: fsync(): %m"); | |
2844 | return ISC_R_IOERROR; | |
2845 | } | |
2846 | } | |
6705543f DH |
2847 | |
2848 | return ISC_R_SUCCESS; | |
98bd7ca0 DH |
2849 | } |
2850 | ||
007e3ee4 | 2851 | int write_client_lease (client, lease, rewrite, makesure) |
02d9e453 | 2852 | struct client_state *client; |
cc26de46 | 2853 | struct client_lease *lease; |
5c2f78b4 | 2854 | int rewrite; |
007e3ee4 | 2855 | int makesure; |
cc26de46 | 2856 | { |
02a015fb | 2857 | struct data_string ds; |
007e3ee4 | 2858 | int errors = 0; |
dd215f30 | 2859 | char *s; |
5e864416 | 2860 | const char *tval; |
5c2f78b4 TL |
2861 | |
2862 | if (!rewrite) { | |
2863 | if (leases_written++ > 20) { | |
2864 | rewrite_client_leases (); | |
2865 | leases_written = 0; | |
2866 | } | |
2867 | } | |
cc26de46 | 2868 | |
b00d3884 TL |
2869 | /* If the lease came from the config file, we don't need to stash |
2870 | a copy in the lease database. */ | |
2871 | if (lease -> is_static) | |
007e3ee4 | 2872 | return 1; |
b00d3884 | 2873 | |
98bd7ca0 | 2874 | if (leaseFile == NULL) { /* XXX */ |
cc26de46 | 2875 | leaseFile = fopen (path_dhclient_db, "w"); |
98bd7ca0 | 2876 | if (leaseFile == NULL) { |
ee8a3653 TL |
2877 | log_error ("can't create %s: %m", path_dhclient_db); |
2878 | return 0; | |
2879 | } | |
cc26de46 TL |
2880 | } |
2881 | ||
007e3ee4 | 2882 | errno = 0; |
cc26de46 | 2883 | fprintf (leaseFile, "lease {\n"); |
dd215f30 | 2884 | if (lease -> is_bootp) { |
66f973e4 | 2885 | fprintf (leaseFile, " bootp;\n"); |
dd215f30 TL |
2886 | if (errno) { |
2887 | ++errors; | |
2888 | errno = 0; | |
2889 | } | |
2890 | } | |
02d9e453 TL |
2891 | fprintf (leaseFile, " interface \"%s\";\n", |
2892 | client -> interface -> name); | |
dd215f30 TL |
2893 | if (errno) { |
2894 | ++errors; | |
2895 | errno = 0; | |
2896 | } | |
2897 | if (client -> name) { | |
02d9e453 | 2898 | fprintf (leaseFile, " name \"%s\";\n", client -> name); |
dd215f30 TL |
2899 | if (errno) { |
2900 | ++errors; | |
2901 | errno = 0; | |
2902 | } | |
2903 | } | |
cc26de46 TL |
2904 | fprintf (leaseFile, " fixed-address %s;\n", |
2905 | piaddr (lease -> address)); | |
dd215f30 TL |
2906 | if (errno) { |
2907 | ++errors; | |
2908 | errno = 0; | |
2909 | } | |
2910 | if (lease -> filename) { | |
2911 | s = quotify_string (lease -> filename, MDL); | |
2912 | if (s) { | |
2913 | fprintf (leaseFile, " filename \"%s\";\n", s); | |
2914 | if (errno) { | |
2915 | ++errors; | |
2916 | errno = 0; | |
2917 | } | |
2918 | dfree (s, MDL); | |
2919 | } else | |
2920 | errors++; | |
2921 | ||
2922 | } | |
23e10d37 DH |
2923 | if (lease->server_name != NULL) { |
2924 | s = quotify_string(lease->server_name, MDL); | |
2925 | if (s != NULL) { | |
2926 | fprintf(leaseFile, " server-name \"%s\";\n", s); | |
dd215f30 TL |
2927 | if (errno) { |
2928 | ++errors; | |
2929 | errno = 0; | |
2930 | } | |
23e10d37 | 2931 | dfree(s, MDL); |
dd215f30 TL |
2932 | } else |
2933 | ++errors; | |
2934 | } | |
2935 | if (lease -> medium) { | |
2936 | s = quotify_string (lease -> medium -> string, MDL); | |
2937 | if (s) { | |
2938 | fprintf (leaseFile, " medium \"%s\";\n", s); | |
2939 | if (errno) { | |
2940 | ++errors; | |
2941 | errno = 0; | |
2942 | } | |
2943 | dfree (s, MDL); | |
2944 | } else | |
2945 | errors++; | |
2946 | } | |
007e3ee4 TL |
2947 | if (errno != 0) { |
2948 | errors++; | |
2949 | errno = 0; | |
2950 | } | |
2455808f TL |
2951 | |
2952 | memset (&ds, 0, sizeof ds); | |
230e73e4 | 2953 | |
98bd7ca0 | 2954 | write_options(client, lease->options, " "); |
5c2f78b4 | 2955 | |
5e864416 DH |
2956 | tval = print_time(lease->renewal); |
2957 | if (tval == NULL || | |
2958 | fprintf(leaseFile, " renew %s\n", tval) < 0) | |
dd215f30 | 2959 | errors++; |
5e864416 DH |
2960 | |
2961 | tval = print_time(lease->rebind); | |
2962 | if (tval == NULL || | |
2963 | fprintf(leaseFile, " rebind %s\n", tval) < 0) | |
dd215f30 | 2964 | errors++; |
5e864416 DH |
2965 | |
2966 | tval = print_time(lease->expiry); | |
2967 | if (tval == NULL || | |
2968 | fprintf(leaseFile, " expire %s\n", tval) < 0) | |
dd215f30 | 2969 | errors++; |
5e864416 DH |
2970 | |
2971 | if (fprintf(leaseFile, "}\n") < 0) | |
dd215f30 | 2972 | errors++; |
5e864416 DH |
2973 | |
2974 | if (fflush(leaseFile) != 0) | |
007e3ee4 | 2975 | errors++; |
5e864416 | 2976 | |
007e3ee4 TL |
2977 | if (!errors && makesure) { |
2978 | if (fsync (fileno (leaseFile)) < 0) { | |
2979 | log_info ("write_client_lease: %m"); | |
2980 | return 0; | |
2981 | } | |
2982 | } | |
2983 | return errors ? 0 : 1; | |
cc26de46 TL |
2984 | } |
2985 | ||
2986 | /* Variables holding name of script and file pointer for writing to | |
2987 | script. Needless to say, this is not reentrant - only one script | |
2988 | can be invoked at a time. */ | |
2989 | char scriptName [256]; | |
2990 | FILE *scriptFile; | |
2991 | ||
02d9e453 TL |
2992 | void script_init (client, reason, medium) |
2993 | struct client_state *client; | |
b1b7b521 | 2994 | const char *reason; |
9bdb9271 | 2995 | struct string_list *medium; |
cc26de46 | 2996 | { |
32a47563 | 2997 | struct string_list *sl, *next; |
cc26de46 | 2998 | |
02d9e453 | 2999 | if (client) { |
32a47563 TL |
3000 | for (sl = client -> env; sl; sl = next) { |
3001 | next = sl -> next; | |
3002 | dfree (sl, MDL); | |
3003 | } | |
3004 | client -> env = (struct string_list *)0; | |
3005 | client -> envc = 0; | |
3dbe2246 | 3006 | |
02d9e453 | 3007 | if (client -> interface) { |
32a47563 TL |
3008 | client_envadd (client, "", "interface", "%s", |
3009 | client -> interface -> name); | |
02d9e453 TL |
3010 | } |
3011 | if (client -> name) | |
32a47563 TL |
3012 | client_envadd (client, |
3013 | "", "client", "%s", client -> name); | |
3014 | if (medium) | |
3015 | client_envadd (client, | |
3016 | "", "medium", "%s", medium -> string); | |
3017 | ||
3018 | client_envadd (client, "", "reason", "%s", reason); | |
6f7081bd | 3019 | client_envadd (client, "", "pid", "%ld", (long int)getpid ()); |
9bdb9271 | 3020 | } |
cc26de46 TL |
3021 | } |
3022 | ||
c0504523 TL |
3023 | void client_option_envadd (struct option_cache *oc, |
3024 | struct packet *packet, struct lease *lease, | |
66e9cecf | 3025 | struct client_state *client_state, |
c0504523 TL |
3026 | struct option_state *in_options, |
3027 | struct option_state *cfg_options, | |
3028 | struct binding_scope **scope, | |
3029 | struct universe *u, void *stuff) | |
3030 | { | |
3031 | struct envadd_state *es = stuff; | |
3032 | struct data_string data; | |
3033 | memset (&data, 0, sizeof data); | |
3034 | ||
66e9cecf | 3035 | if (evaluate_option_cache (&data, packet, lease, client_state, |
c0504523 TL |
3036 | in_options, cfg_options, scope, oc, MDL)) { |
3037 | if (data.len) { | |
3038 | char name [256]; | |
3039 | if (dhcp_option_ev_name (name, sizeof name, | |
bea17697 SR |
3040 | oc->option)) { |
3041 | const char *value; | |
3042 | value = pretty_print_option(oc->option, | |
3043 | data.data, | |
3044 | data.len, 0, 0); | |
3045 | size_t length = strlen(value); | |
3046 | ||
3047 | if (check_option_values(oc->option->universe, | |
3048 | oc->option->code, | |
3049 | value, length) == 0) { | |
3050 | client_envadd(es->client, es->prefix, | |
3051 | name, "%s", value); | |
3052 | } else { | |
3053 | log_error("suspect value in %s " | |
3054 | "option - discarded", | |
3055 | name); | |
3056 | } | |
c0504523 TL |
3057 | data_string_forget (&data, MDL); |
3058 | } | |
3059 | } | |
3060 | } | |
3061 | } | |
3062 | ||
02d9e453 TL |
3063 | void script_write_params (client, prefix, lease) |
3064 | struct client_state *client; | |
b1b7b521 | 3065 | const char *prefix; |
cc26de46 TL |
3066 | struct client_lease *lease; |
3067 | { | |
3068 | int i; | |
02a015fb TL |
3069 | struct data_string data; |
3070 | struct option_cache *oc; | |
c0504523 TL |
3071 | struct envadd_state es; |
3072 | ||
3073 | es.client = client; | |
3074 | es.prefix = prefix; | |
cc26de46 | 3075 | |
32a47563 TL |
3076 | client_envadd (client, |
3077 | prefix, "ip_address", "%s", piaddr (lease -> address)); | |
c6abd205 TL |
3078 | |
3079 | /* For the benefit of Linux (and operating systems which may | |
3080 | have similar needs), compute the network address based on | |
3081 | the supplied ip address and netmask, if provided. Also | |
3082 | compute the broadcast address (the host address all ones | |
3083 | broadcast address, not the host address all zeroes | |
3084 | broadcast address). */ | |
3085 | ||
02a015fb | 3086 | memset (&data, 0, sizeof data); |
230e73e4 | 3087 | oc = lookup_option (&dhcp_universe, lease -> options, DHO_SUBNET_MASK); |
66e9cecf TL |
3088 | if (oc && evaluate_option_cache (&data, (struct packet *)0, |
3089 | (struct lease *)0, client, | |
0852a27f | 3090 | (struct option_state *)0, |
da38df14 | 3091 | lease -> options, |
cf78bf20 | 3092 | &global_scope, oc, MDL)) { |
02a015fb TL |
3093 | if (data.len > 3) { |
3094 | struct iaddr netmask, subnet, broadcast; | |
3095 | ||
8a4e543b DH |
3096 | /* |
3097 | * No matter the length of the subnet-mask option, | |
3098 | * use only the first four octets. Note that | |
3099 | * subnet-mask options longer than 4 octets are not | |
3100 | * in conformance with RFC 2132, but servers with this | |
3101 | * flaw do exist. | |
3102 | */ | |
3103 | memcpy(netmask.iabuf, data.data, 4); | |
3104 | netmask.len = 4; | |
cf78bf20 | 3105 | data_string_forget (&data, MDL); |
02a015fb TL |
3106 | |
3107 | subnet = subnet_number (lease -> address, netmask); | |
3108 | if (subnet.len) { | |
32a47563 TL |
3109 | client_envadd (client, prefix, "network_number", |
3110 | "%s", piaddr (subnet)); | |
3111 | ||
3112 | oc = lookup_option (&dhcp_universe, | |
3113 | lease -> options, | |
3114 | DHO_BROADCAST_ADDRESS); | |
3115 | if (!oc || | |
3116 | !(evaluate_option_cache | |
3117 | (&data, (struct packet *)0, | |
66e9cecf | 3118 | (struct lease *)0, client, |
32a47563 TL |
3119 | (struct option_state *)0, |
3120 | lease -> options, | |
3121 | &global_scope, oc, MDL))) { | |
3122 | broadcast = broadcast_addr (subnet, netmask); | |
3123 | if (broadcast.len) { | |
3124 | client_envadd (client, | |
3125 | prefix, "broadcast_address", | |
a8c190df | 3126 | "%s", piaddr (broadcast)); |
c6abd205 | 3127 | } |
32a47563 | 3128 | } |
c6abd205 TL |
3129 | } |
3130 | } | |
cf78bf20 | 3131 | data_string_forget (&data, MDL); |
c6abd205 TL |
3132 | } |
3133 | ||
bea17697 SR |
3134 | if (lease->filename) { |
3135 | if (check_option_values(NULL, DHO_ROOT_PATH, | |
3136 | lease->filename, | |
3137 | strlen(lease->filename)) == 0) { | |
3138 | client_envadd(client, prefix, "filename", | |
3139 | "%s", lease->filename); | |
3140 | } else { | |
3141 | log_error("suspect value in %s " | |
3142 | "option - discarded", | |
3143 | lease->filename); | |
3144 | } | |
3145 | } | |
3146 | ||
3147 | if (lease->server_name) { | |
3148 | if (check_option_values(NULL, DHO_HOST_NAME, | |
3149 | lease->server_name, | |
3150 | strlen(lease->server_name)) == 0 ) { | |
3151 | client_envadd (client, prefix, "server_name", | |
3152 | "%s", lease->server_name); | |
3153 | } else { | |
3154 | log_error("suspect value in %s " | |
3155 | "option - discarded", | |
3156 | lease->server_name); | |
3157 | } | |
3158 | } | |
3159 | ||
02a015fb | 3160 | |
c0504523 TL |
3161 | for (i = 0; i < lease -> options -> universe_count; i++) { |
3162 | option_space_foreach ((struct packet *)0, (struct lease *)0, | |
66e9cecf | 3163 | client, (struct option_state *)0, |
c0504523 TL |
3164 | lease -> options, &global_scope, |
3165 | universes [i], | |
3166 | &es, client_option_envadd); | |
cc26de46 | 3167 | } |
32a47563 | 3168 | client_envadd (client, prefix, "expiry", "%d", (int)(lease -> expiry)); |
cc26de46 TL |
3169 | } |
3170 | ||
02d9e453 TL |
3171 | int script_go (client) |
3172 | struct client_state *client; | |
cc26de46 | 3173 | { |
32a47563 TL |
3174 | char *scriptName; |
3175 | char *argv [2]; | |
3176 | char **envp; | |
32a47563 TL |
3177 | char reason [] = "REASON=NBI"; |
3178 | static char client_path [] = CLIENT_PATH; | |
3179 | int i; | |
3180 | struct string_list *sp, *next; | |
3181 | int pid, wpid, wstatus; | |
cc26de46 | 3182 | |
b1423aed | 3183 | if (client) |
32a47563 | 3184 | scriptName = client -> config -> script_name; |
b1423aed TL |
3185 | else |
3186 | scriptName = top_level_config.script_name; | |
3187 | ||
3188 | envp = dmalloc (((client ? client -> envc : 2) + | |
3189 | client_env_count + 2) * sizeof (char *), MDL); | |
3190 | if (!envp) { | |
3191 | log_error ("No memory for client script environment."); | |
3192 | return 0; | |
3193 | } | |
3194 | i = 0; | |
3195 | /* Copy out the environment specified on the command line, | |
3196 | if any. */ | |
3197 | for (sp = client_env; sp; sp = sp -> next) { | |
3198 | envp [i++] = sp -> string; | |
3199 | } | |
3200 | /* Copy out the environment specified by dhclient. */ | |
3201 | if (client) { | |
32a47563 TL |
3202 | for (sp = client -> env; sp; sp = sp -> next) { |
3203 | envp [i++] = sp -> string; | |
3204 | } | |
32a47563 | 3205 | } else { |
b1423aed | 3206 | envp [i++] = reason; |
32a47563 | 3207 | } |
b1423aed TL |
3208 | /* Set $PATH. */ |
3209 | envp [i++] = client_path; | |
3210 | envp [i] = (char *)0; | |
32a47563 TL |
3211 | |
3212 | argv [0] = scriptName; | |
3213 | argv [1] = (char *)0; | |
3214 | ||
3215 | pid = fork (); | |
3216 | if (pid < 0) { | |
3217 | log_error ("fork: %m"); | |
3218 | wstatus = 0; | |
3219 | } else if (pid) { | |
3220 | do { | |
3221 | wpid = wait (&wstatus); | |
3222 | } while (wpid != pid && wpid > 0); | |
3223 | if (wpid < 0) { | |
3224 | log_error ("wait: %m"); | |
3225 | wstatus = 0; | |
3226 | } | |
3227 | } else { | |
4d97a043 DH |
3228 | /* We don't want to pass an open file descriptor for |
3229 | * dhclient.leases when executing dhclient-script. | |
3230 | */ | |
3231 | if (leaseFile != NULL) | |
3232 | fclose(leaseFile); | |
32a47563 TL |
3233 | execve (scriptName, argv, envp); |
3234 | log_error ("execve (%s, ...): %m", scriptName); | |
3235 | exit (0); | |
3236 | } | |
3237 | ||
3238 | if (client) { | |
3239 | for (sp = client -> env; sp; sp = next) { | |
3240 | next = sp -> next; | |
3241 | dfree (sp, MDL); | |
3242 | } | |
3243 | client -> env = (struct string_list *)0; | |
3244 | client -> envc = 0; | |
32a47563 | 3245 | } |
b1423aed | 3246 | dfree (envp, MDL); |
be62cf06 | 3247 | gettimeofday(&cur_tv, NULL); |
ed0f73ab TL |
3248 | return (WIFEXITED (wstatus) ? |
3249 | WEXITSTATUS (wstatus) : -WTERMSIG (wstatus)); | |
32a47563 TL |
3250 | } |
3251 | ||
3252 | void client_envadd (struct client_state *client, | |
3253 | const char *prefix, const char *name, const char *fmt, ...) | |
3254 | { | |
3255 | char spbuf [1024]; | |
3256 | char *s; | |
28868515 | 3257 | unsigned len; |
32a47563 TL |
3258 | struct string_list *val; |
3259 | va_list list; | |
3260 | ||
3261 | va_start (list, fmt); | |
3262 | len = vsnprintf (spbuf, sizeof spbuf, fmt, list); | |
3263 | va_end (list); | |
3264 | ||
3265 | val = dmalloc (strlen (prefix) + strlen (name) + 1 /* = */ + | |
3266 | len + sizeof *val, MDL); | |
3267 | if (!val) | |
3268 | return; | |
3269 | s = val -> string; | |
3270 | strcpy (s, prefix); | |
3271 | strcat (s, name); | |
3272 | s += strlen (s); | |
3273 | *s++ = '='; | |
3274 | if (len >= sizeof spbuf) { | |
3275 | va_start (list, fmt); | |
3276 | vsnprintf (s, len + 1, fmt, list); | |
3277 | va_end (list); | |
3278 | } else | |
3279 | strcpy (s, spbuf); | |
3280 | val -> next = client -> env; | |
3281 | client -> env = val; | |
3282 | client -> envc++; | |
cc26de46 TL |
3283 | } |
3284 | ||
32a47563 TL |
3285 | int dhcp_option_ev_name (buf, buflen, option) |
3286 | char *buf; | |
6ceb9118 | 3287 | size_t buflen; |
cc26de46 TL |
3288 | struct option *option; |
3289 | { | |
c0504523 TL |
3290 | int i, j; |
3291 | const char *s; | |
cc26de46 | 3292 | |
c0504523 TL |
3293 | j = 0; |
3294 | if (option -> universe != &dhcp_universe) { | |
3295 | s = option -> universe -> name; | |
3296 | i = 0; | |
3dbe2246 | 3297 | } else { |
c0504523 TL |
3298 | s = option -> name; |
3299 | i = 1; | |
cc26de46 TL |
3300 | } |
3301 | ||
c0504523 TL |
3302 | do { |
3303 | while (*s) { | |
3304 | if (j + 1 == buflen) | |
3305 | return 0; | |
3306 | if (*s == '-') | |
3307 | buf [j++] = '_'; | |
3308 | else | |
3309 | buf [j++] = *s; | |
3310 | ++s; | |
3311 | } | |
3312 | if (!i) { | |
3313 | s = option -> name; | |
3314 | if (j + 1 == buflen) | |
3315 | return 0; | |
3316 | buf [j++] = '_'; | |
3317 | } | |
3318 | ++i; | |
3319 | } while (i != 2); | |
3320 | ||
3321 | buf [j] = 0; | |
32a47563 | 3322 | return 1; |
cc26de46 | 3323 | } |
b00d3884 TL |
3324 | |
3325 | void go_daemon () | |
3326 | { | |
3327 | static int state = 0; | |
3328 | int pid; | |
3329 | ||
3330 | /* Don't become a daemon if the user requested otherwise. */ | |
b8cf055d TL |
3331 | if (no_daemon) { |
3332 | write_client_pid_file (); | |
b00d3884 | 3333 | return; |
b8cf055d | 3334 | } |
b00d3884 TL |
3335 | |
3336 | /* Only do it once. */ | |
3337 | if (state) | |
3338 | return; | |
3339 | state = 1; | |
3340 | ||
3341 | /* Stop logging to stderr... */ | |
3342 | log_perror = 0; | |
3343 | ||
3344 | /* Become a daemon... */ | |
3345 | if ((pid = fork ()) < 0) | |
8ae2d595 | 3346 | log_fatal ("Can't fork daemon: %m"); |
b00d3884 TL |
3347 | else if (pid) |
3348 | exit (0); | |
3349 | /* Become session leader and get pid... */ | |
3350 | pid = setsid (); | |
b8cf055d | 3351 | |
62d0cb47 | 3352 | /* Close standard I/O descriptors. */ |
3dbe2246 FD |
3353 | close(0); |
3354 | close(1); | |
3355 | close(2); | |
62d0cb47 | 3356 | |
a609e69b | 3357 | /* Reopen them on /dev/null. */ |
509df655 SK |
3358 | open("/dev/null", O_RDWR); |
3359 | open("/dev/null", O_RDWR); | |
3360 | open("/dev/null", O_RDWR); | |
a609e69b | 3361 | |
b8cf055d | 3362 | write_client_pid_file (); |
a546f2a7 | 3363 | |
ae566556 | 3364 | IGNORE_RET (chdir("/")); |
b8cf055d TL |
3365 | } |
3366 | ||
3367 | void write_client_pid_file () | |
3368 | { | |
3369 | FILE *pf; | |
3370 | int pfdesc; | |
3371 | ||
3372 | pfdesc = open (path_dhclient_pid, O_CREAT | O_TRUNC | O_WRONLY, 0644); | |
3373 | ||
3374 | if (pfdesc < 0) { | |
8ae2d595 | 3375 | log_error ("Can't create %s: %m", path_dhclient_pid); |
b8cf055d TL |
3376 | return; |
3377 | } | |
3378 | ||
3379 | pf = fdopen (pfdesc, "w"); | |
3380 | if (!pf) | |
8ae2d595 | 3381 | log_error ("Can't fdopen %s: %m", path_dhclient_pid); |
b8cf055d | 3382 | else { |
19ea90f7 | 3383 | fprintf (pf, "%ld\n", (long)getpid ()); |
b8cf055d TL |
3384 | fclose (pf); |
3385 | } | |
3386 | } | |
3387 | ||
b8cf055d TL |
3388 | void client_location_changed () |
3389 | { | |
3390 | struct interface_info *ip; | |
02d9e453 | 3391 | struct client_state *client; |
b8cf055d TL |
3392 | |
3393 | for (ip = interfaces; ip; ip = ip -> next) { | |
02d9e453 TL |
3394 | for (client = ip -> client; client; client = client -> next) { |
3395 | switch (client -> state) { | |
3396 | case S_SELECTING: | |
3397 | cancel_timeout (send_discover, client); | |
3398 | break; | |
b8cf055d | 3399 | |
02d9e453 TL |
3400 | case S_BOUND: |
3401 | cancel_timeout (state_bound, client); | |
3402 | break; | |
b8cf055d | 3403 | |
02d9e453 TL |
3404 | case S_REBOOTING: |
3405 | case S_REQUESTING: | |
3406 | case S_RENEWING: | |
3407 | cancel_timeout (send_request, client); | |
3408 | break; | |
b8cf055d | 3409 | |
02d9e453 TL |
3410 | case S_INIT: |
3411 | case S_REBINDING: | |
57710b89 | 3412 | case S_STOPPED: |
02d9e453 TL |
3413 | break; |
3414 | } | |
3415 | client -> state = S_INIT; | |
3416 | state_reboot (client); | |
b8cf055d | 3417 | } |
b8cf055d TL |
3418 | } |
3419 | } | |
6767b592 | 3420 | |
3dbe2246 | 3421 | void do_release(client) |
347de8bd TL |
3422 | struct client_state *client; |
3423 | { | |
007e3ee4 TL |
3424 | struct data_string ds; |
3425 | struct option_cache *oc; | |
3426 | ||
57710b89 | 3427 | /* Pick a random xid. */ |
347de8bd TL |
3428 | client -> xid = random (); |
3429 | ||
bdcaf7b9 TL |
3430 | /* is there even a lease to release? */ |
3431 | if (client -> active) { | |
3432 | /* Make a DHCPRELEASE packet, and set appropriate per-interface | |
3433 | flags. */ | |
3434 | make_release (client, client -> active); | |
007e3ee4 TL |
3435 | |
3436 | memset (&ds, 0, sizeof ds); | |
3437 | oc = lookup_option (&dhcp_universe, | |
3438 | client -> active -> options, | |
3439 | DHO_DHCP_SERVER_IDENTIFIER); | |
3440 | if (oc && | |
3441 | evaluate_option_cache (&ds, (struct packet *)0, | |
66e9cecf | 3442 | (struct lease *)0, client, |
007e3ee4 TL |
3443 | (struct option_state *)0, |
3444 | client -> active -> options, | |
3445 | &global_scope, oc, MDL)) { | |
3446 | if (ds.len > 3) { | |
3447 | memcpy (client -> destination.iabuf, | |
3448 | ds.data, 4); | |
3449 | client -> destination.len = 4; | |
3450 | } else | |
3451 | client -> destination = iaddr_broadcast; | |
98311e4b DH |
3452 | |
3453 | data_string_forget (&ds, MDL); | |
007e3ee4 TL |
3454 | } else |
3455 | client -> destination = iaddr_broadcast; | |
bdcaf7b9 TL |
3456 | client -> first_sending = cur_time; |
3457 | client -> interval = client -> config -> initial_interval; | |
3dbe2246 | 3458 | |
bdcaf7b9 TL |
3459 | /* Zap the medium list... */ |
3460 | client -> medium = (struct string_list *)0; | |
3dbe2246 | 3461 | |
bdcaf7b9 TL |
3462 | /* Send out the first and only DHCPRELEASE packet. */ |
3463 | send_release (client); | |
347de8bd | 3464 | |
007e3ee4 | 3465 | /* Do the client script RELEASE operation. */ |
bdcaf7b9 TL |
3466 | script_init (client, |
3467 | "RELEASE", (struct string_list *)0); | |
3468 | if (client -> alias) | |
3469 | script_write_params (client, "alias_", | |
3470 | client -> alias); | |
d758ad8c | 3471 | script_write_params (client, "old_", client -> active); |
bdcaf7b9 TL |
3472 | script_go (client); |
3473 | } | |
007e3ee4 | 3474 | |
57710b89 TL |
3475 | /* Cancel any timeouts. */ |
3476 | cancel_timeout (state_bound, client); | |
3477 | cancel_timeout (send_discover, client); | |
3478 | cancel_timeout (state_init, client); | |
3479 | cancel_timeout (send_request, client); | |
3480 | cancel_timeout (state_reboot, client); | |
3481 | client -> state = S_STOPPED; | |
347de8bd TL |
3482 | } |
3483 | ||
20916cae TL |
3484 | int dhclient_interface_shutdown_hook (struct interface_info *interface) |
3485 | { | |
3486 | do_release (interface -> client); | |
57710b89 | 3487 | |
20916cae TL |
3488 | return 1; |
3489 | } | |
347de8bd | 3490 | |
20916cae TL |
3491 | int dhclient_interface_discovery_hook (struct interface_info *tmp) |
3492 | { | |
3493 | struct interface_info *last, *ip; | |
3494 | /* See if we can find the client from dummy_interfaces */ | |
3495 | last = 0; | |
3496 | for (ip = dummy_interfaces; ip; ip = ip -> next) { | |
3497 | if (!strcmp (ip -> name, tmp -> name)) { | |
3498 | /* Remove from dummy_interfaces */ | |
3499 | if (last) { | |
3500 | ip = (struct interface_info *)0; | |
3501 | interface_reference (&ip, last -> next, MDL); | |
3502 | interface_dereference (&last -> next, MDL); | |
3503 | if (ip -> next) { | |
3504 | interface_reference (&last -> next, | |
3505 | ip -> next, MDL); | |
3506 | interface_dereference (&ip -> next, | |
3507 | MDL); | |
3508 | } | |
3509 | } else { | |
3510 | ip = (struct interface_info *)0; | |
3511 | interface_reference (&ip, | |
3512 | dummy_interfaces, MDL); | |
3513 | interface_dereference (&dummy_interfaces, MDL); | |
3514 | if (ip -> next) { | |
3515 | interface_reference (&dummy_interfaces, | |
3516 | ip -> next, MDL); | |
3517 | interface_dereference (&ip -> next, | |
3518 | MDL); | |
3519 | } | |
3520 | } | |
3521 | /* Copy "client" to tmp */ | |
3522 | if (ip -> client) { | |
3523 | tmp -> client = ip -> client; | |
3524 | tmp -> client -> interface = tmp; | |
3525 | } | |
3526 | interface_dereference (&ip, MDL); | |
3527 | break; | |
3528 | } | |
3529 | last = ip; | |
3530 | } | |
3531 | return 1; | |
3532 | } | |
347de8bd | 3533 | |
57710b89 TL |
3534 | isc_result_t dhclient_interface_startup_hook (struct interface_info *interface) |
3535 | { | |
3536 | struct interface_info *ip; | |
3537 | struct client_state *client; | |
be62cf06 | 3538 | struct timeval tv; |
57710b89 TL |
3539 | |
3540 | /* This code needs some rethinking. It doesn't test against | |
3541 | a signal name, and it just kind of bulls into doing something | |
3542 | that may or may not be appropriate. */ | |
3543 | ||
3544 | if (interfaces) { | |
3545 | interface_reference (&interface -> next, interfaces, MDL); | |
3546 | interface_dereference (&interfaces, MDL); | |
3547 | } | |
3548 | interface_reference (&interfaces, interface, MDL); | |
3549 | ||
3550 | discover_interfaces (DISCOVER_UNCONFIGURED); | |
3551 | ||
3552 | for (ip = interfaces; ip; ip = ip -> next) { | |
3553 | /* If interfaces were specified, don't configure | |
3554 | interfaces that weren't specified! */ | |
3555 | if (ip -> flags & INTERFACE_RUNNING || | |
3556 | (ip -> flags & (INTERFACE_REQUESTED | | |
3557 | INTERFACE_AUTOMATIC)) != | |
3558 | INTERFACE_REQUESTED) | |
3559 | continue; | |
3560 | script_init (ip -> client, | |
3561 | "PREINIT", (struct string_list *)0); | |
3562 | if (ip -> client -> alias) | |
3563 | script_write_params (ip -> client, "alias_", | |
3564 | ip -> client -> alias); | |
3565 | script_go (ip -> client); | |
3566 | } | |
3dbe2246 FD |
3567 | |
3568 | discover_interfaces (interfaces_requested != 0 | |
57710b89 TL |
3569 | ? DISCOVER_REQUESTED |
3570 | : DISCOVER_RUNNING); | |
3571 | ||
3572 | for (ip = interfaces; ip; ip = ip -> next) { | |
3573 | if (ip -> flags & INTERFACE_RUNNING) | |
3574 | continue; | |
3575 | ip -> flags |= INTERFACE_RUNNING; | |
3576 | for (client = ip -> client; client; client = client -> next) { | |
3577 | client -> state = S_INIT; | |
3578 | /* Set up a timeout to start the initialization | |
3579 | process. */ | |
be62cf06 FD |
3580 | tv . tv_sec = cur_time + random () % 5; |
3581 | tv . tv_usec = 0; | |
3582 | add_timeout (&tv, state_reboot, client, 0, 0); | |
57710b89 TL |
3583 | } |
3584 | } | |
3585 | return ISC_R_SUCCESS; | |
3586 | } | |
3587 | ||
6767b592 TL |
3588 | /* The client should never receive a relay agent information option, |
3589 | so if it does, log it and discard it. */ | |
3590 | ||
3591 | int parse_agent_information_option (packet, len, data) | |
3592 | struct packet *packet; | |
3593 | int len; | |
3594 | u_int8_t *data; | |
3595 | { | |
6767b592 TL |
3596 | return 1; |
3597 | } | |
3598 | ||
3599 | /* The client never sends relay agent information options. */ | |
3600 | ||
3601 | unsigned cons_agent_information_options (cfg_options, outpacket, | |
3602 | agentix, length) | |
3603 | struct option_state *cfg_options; | |
3604 | struct dhcp_packet *outpacket; | |
3605 | unsigned agentix; | |
3606 | unsigned length; | |
3607 | { | |
3608 | return length; | |
3609 | } | |
d758ad8c TL |
3610 | |
3611 | static void shutdown_exit (void *foo) | |
3612 | { | |
3613 | exit (0); | |
3614 | } | |
3615 | ||
98bf1607 SR |
3616 | #if defined (NSUPDATE) |
3617 | /* | |
3618 | * If the first query fails, the updater MUST NOT delete the DNS name. It | |
3619 | * may be that the host whose lease on the server has expired has moved | |
3620 | * to another network and obtained a lease from a different server, | |
3621 | * which has caused the client's A RR to be replaced. It may also be | |
3622 | * that some other client has been configured with a name that matches | |
3623 | * the name of the DHCP client, and the policy was that the last client | |
3624 | * to specify the name would get the name. In this case, the DHCID RR | |
3625 | * will no longer match the updater's notion of the client-identity of | |
3626 | * the host pointed to by the DNS name. | |
3627 | * -- "Interaction between DHCP and DNS" | |
3628 | */ | |
3629 | ||
3630 | /* The first and second stages are pretty similar so we combine them */ | |
3631 | void | |
3632 | client_dns_remove_action(dhcp_ddns_cb_t *ddns_cb, | |
3633 | isc_result_t eresult) | |
3634 | { | |
3635 | ||
3636 | isc_result_t result; | |
3637 | ||
3638 | if ((eresult == ISC_R_SUCCESS) && | |
3639 | (ddns_cb->state == DDNS_STATE_REM_FW_YXDHCID)) { | |
3640 | /* Do the second stage of the FWD removal */ | |
3641 | ddns_cb->state = DDNS_STATE_REM_FW_NXRR; | |
3642 | ||
3643 | result = ddns_modify_fwd(ddns_cb); | |
3644 | if (result == ISC_R_SUCCESS) { | |
3645 | return; | |
3646 | } | |
3647 | } | |
3648 | ||
3649 | /* If we are done or have an error clean up */ | |
3650 | ddns_cb_free(ddns_cb, MDL); | |
3651 | return; | |
3652 | } | |
3653 | ||
3654 | void | |
3655 | client_dns_remove(struct client_state *client, | |
3656 | struct iaddr *addr) | |
3657 | { | |
3658 | dhcp_ddns_cb_t *ddns_cb; | |
3659 | isc_result_t result; | |
3660 | ||
3661 | /* if we have an old ddns request for this client, cancel it */ | |
3662 | if (client->ddns_cb != NULL) { | |
3663 | ddns_cancel(client->ddns_cb); | |
3664 | client->ddns_cb = NULL; | |
3665 | } | |
3666 | ||
3667 | ddns_cb = ddns_cb_alloc(MDL); | |
3668 | if (ddns_cb != NULL) { | |
3669 | ddns_cb->address = *addr; | |
3670 | ddns_cb->timeout = 0; | |
3671 | ||
3672 | ddns_cb->state = DDNS_STATE_REM_FW_YXDHCID; | |
3673 | ddns_cb->flags = DDNS_UPDATE_ADDR; | |
3674 | ddns_cb->cur_func = client_dns_remove_action; | |
3675 | ||
3676 | result = client_dns_update(client, ddns_cb); | |
3677 | ||
3678 | if (result != ISC_R_TIMEDOUT) { | |
3679 | ddns_cb_free(ddns_cb, MDL); | |
3680 | } | |
3681 | } | |
3682 | } | |
3683 | #endif | |
3684 | ||
d758ad8c TL |
3685 | isc_result_t dhcp_set_control_state (control_object_state_t oldstate, |
3686 | control_object_state_t newstate) | |
3687 | { | |
3688 | struct interface_info *ip; | |
3689 | struct client_state *client; | |
be62cf06 | 3690 | struct timeval tv; |
d758ad8c TL |
3691 | |
3692 | /* Do the right thing for each interface. */ | |
3693 | for (ip = interfaces; ip; ip = ip -> next) { | |
3694 | for (client = ip -> client; client; client = client -> next) { | |
3695 | switch (newstate) { | |
3696 | case server_startup: | |
3697 | return ISC_R_SUCCESS; | |
3698 | ||
3699 | case server_running: | |
3700 | return ISC_R_SUCCESS; | |
3701 | ||
3702 | case server_shutdown: | |
3703 | if (client -> active && | |
3704 | client -> active -> expiry > cur_time) { | |
98bf1607 SR |
3705 | #if defined (NSUPDATE) |
3706 | if (client->config->do_forward_update) { | |
3707 | client_dns_remove(client, | |
3708 | &client->active->address); | |
3709 | } | |
3710 | #endif | |
d758ad8c TL |
3711 | do_release (client); |
3712 | } | |
3713 | break; | |
3714 | ||
3715 | case server_hibernate: | |
3716 | state_stop (client); | |
3717 | break; | |
3718 | ||
3719 | case server_awaken: | |
3720 | state_reboot (client); | |
3721 | break; | |
3722 | } | |
3723 | } | |
3724 | } | |
af5fa176 | 3725 | |
be62cf06 FD |
3726 | if (newstate == server_shutdown) { |
3727 | tv . tv_sec = cur_tv . tv_sec + 1; | |
3728 | tv . tv_usec = cur_tv . tv_usec; | |
3729 | add_timeout (&tv, shutdown_exit, 0, 0, 0); | |
3730 | } | |
d758ad8c TL |
3731 | return ISC_R_SUCCESS; |
3732 | } | |
3733 | ||
98bf1607 SR |
3734 | #if defined (NSUPDATE) |
3735 | /* | |
3736 | * Called after a timeout if the DNS update failed on the previous try. | |
3737 | * Starts the retry process. If the retry times out it will schedule | |
3738 | * this routine to run again after a 10x wait. | |
98bd7ca0 DH |
3739 | */ |
3740 | void | |
98bf1607 | 3741 | client_dns_update_timeout (void *cp) |
98bd7ca0 | 3742 | { |
98bf1607 SR |
3743 | dhcp_ddns_cb_t *ddns_cb = (dhcp_ddns_cb_t *)cp; |
3744 | struct client_state *client = (struct client_state *)ddns_cb->lease; | |
3745 | isc_result_t status = ISC_R_FAILURE; | |
98bd7ca0 | 3746 | |
98bf1607 SR |
3747 | if ((client != NULL) && |
3748 | ((client->active != NULL) || | |
3749 | (client->active_lease != NULL))) | |
3750 | status = client_dns_update(client, ddns_cb); | |
98bd7ca0 | 3751 | |
98bf1607 SR |
3752 | /* |
3753 | * A status of timedout indicates that we started the update and | |
3754 | * have released control of the control block. Any other status | |
3755 | * indicates that we should clean up the control block. We either | |
3756 | * got a success which indicates that we didn't really need to | |
3757 | * send an update or some other error in which case we weren't able | |
3758 | * to start the update process. In both cases we still own | |
3759 | * the control block and should free it. | |
3760 | */ | |
3761 | if (status != ISC_R_TIMEDOUT) { | |
3762 | if (client != NULL) { | |
3763 | client->ddns_cb = NULL; | |
3764 | } | |
3765 | ddns_cb_free(ddns_cb, MDL); | |
98bd7ca0 DH |
3766 | } |
3767 | } | |
3768 | ||
98bf1607 SR |
3769 | /* |
3770 | * If the first query succeeds, the updater can conclude that it | |
3771 | * has added a new name whose only RRs are the A and DHCID RR records. | |
3772 | * The A RR update is now complete (and a client updater is finished, | |
3773 | * while a server might proceed to perform a PTR RR update). | |
3774 | * -- "Interaction between DHCP and DNS" | |
3775 | * | |
3776 | * If the second query succeeds, the updater can conclude that the current | |
3777 | * client was the last client associated with the domain name, and that | |
3778 | * the name now contains the updated A RR. The A RR update is now | |
3779 | * complete (and a client updater is finished, while a server would | |
3780 | * then proceed to perform a PTR RR update). | |
3781 | * -- "Interaction between DHCP and DNS" | |
3782 | * | |
3783 | * If the second query fails with NXRRSET, the updater must conclude | |
3784 | * that the client's desired name is in use by another host. At this | |
3785 | * juncture, the updater can decide (based on some administrative | |
3786 | * configuration outside of the scope of this document) whether to let | |
3787 | * the existing owner of the name keep that name, and to (possibly) | |
3788 | * perform some name disambiguation operation on behalf of the current | |
3789 | * client, or to replace the RRs on the name with RRs that represent | |
3790 | * the current client. If the configured policy allows replacement of | |
3791 | * existing records, the updater submits a query that deletes the | |
3792 | * existing A RR and the existing DHCID RR, adding A and DHCID RRs that | |
3793 | * represent the IP address and client-identity of the new client. | |
3794 | * -- "Interaction between DHCP and DNS" | |
3795 | */ | |
98311e4b | 3796 | |
98bf1607 SR |
3797 | /* The first and second stages are pretty similar so we combine them */ |
3798 | void | |
3799 | client_dns_update_action(dhcp_ddns_cb_t *ddns_cb, | |
3800 | isc_result_t eresult) | |
98311e4b | 3801 | { |
98bf1607 | 3802 | isc_result_t result; |
be62cf06 | 3803 | struct timeval tv; |
98311e4b | 3804 | |
98bf1607 SR |
3805 | switch(eresult) { |
3806 | case ISC_R_SUCCESS: | |
3807 | default: | |
3808 | /* Either we succeeded or broke in a bad way, clean up */ | |
3809 | break; | |
3810 | ||
3811 | case DNS_R_YXRRSET: | |
3812 | /* | |
3813 | * This is the only difference between the two stages, | |
3814 | * check to see if it is the first stage, in which case | |
3815 | * start the second stage | |
3816 | */ | |
3817 | if (ddns_cb->state == DDNS_STATE_ADD_FW_NXDOMAIN) { | |
3818 | ddns_cb->state = DDNS_STATE_ADD_FW_YXDHCID; | |
3819 | ddns_cb->cur_func = client_dns_update_action; | |
3820 | ||
3821 | result = ddns_modify_fwd(ddns_cb); | |
3822 | if (result == ISC_R_SUCCESS) { | |
3823 | return; | |
3824 | } | |
3825 | } | |
3826 | break; | |
3827 | ||
3828 | case ISC_R_TIMEDOUT: | |
3829 | /* | |
3830 | * We got a timeout response from the DNS module. Schedule | |
3831 | * another attempt for later. We forget the name, dhcid and | |
3832 | * zone so if it gets changed we will get the new information. | |
3833 | */ | |
3834 | data_string_forget(&ddns_cb->fwd_name, MDL); | |
3835 | data_string_forget(&ddns_cb->dhcid, MDL); | |
3836 | if (ddns_cb->zone != NULL) { | |
3837 | forget_zone((struct dns_zone **)&ddns_cb->zone); | |
3838 | } | |
3839 | ||
3840 | /* Reset to doing the first stage */ | |
3841 | ddns_cb->state = DDNS_STATE_ADD_FW_NXDOMAIN; | |
3842 | ddns_cb->cur_func = client_dns_update_action; | |
3843 | ||
3844 | /* and update our timer */ | |
3845 | if (ddns_cb->timeout < 3600) | |
3846 | ddns_cb->timeout *= 10; | |
3847 | tv.tv_sec = cur_time + ddns_cb->timeout; | |
be62cf06 FD |
3848 | tv.tv_usec = 0; |
3849 | add_timeout(&tv, client_dns_update_timeout, | |
98bf1607 SR |
3850 | ddns_cb, NULL, NULL); |
3851 | return; | |
3852 | } | |
3853 | ||
3854 | ddns_cb_free(ddns_cb, MDL); | |
3855 | return; | |
98311e4b DH |
3856 | } |
3857 | ||
d758ad8c TL |
3858 | /* See if we should do a DNS update, and if so, do it. */ |
3859 | ||
98bf1607 SR |
3860 | isc_result_t |
3861 | client_dns_update(struct client_state *client, dhcp_ddns_cb_t *ddns_cb) | |
d758ad8c | 3862 | { |
98bf1607 | 3863 | struct data_string client_identifier; |
d758ad8c TL |
3864 | struct option_cache *oc; |
3865 | int ignorep; | |
3866 | int result; | |
3867 | isc_result_t rcode; | |
3868 | ||
3869 | /* If we didn't send an FQDN option, we certainly aren't going to | |
3870 | be doing an update. */ | |
3871 | if (!client -> sent_options) | |
98311e4b | 3872 | return ISC_R_SUCCESS; |
d758ad8c TL |
3873 | |
3874 | /* If we don't have a lease, we can't do an update. */ | |
98bd7ca0 | 3875 | if ((client->active == NULL) && (client->active_lease == NULL)) |
98311e4b | 3876 | return ISC_R_SUCCESS; |
d758ad8c TL |
3877 | |
3878 | /* If we set the no client update flag, don't do the update. */ | |
3879 | if ((oc = lookup_option (&fqdn_universe, client -> sent_options, | |
3880 | FQDN_NO_CLIENT_UPDATE)) && | |
3881 | evaluate_boolean_option_cache (&ignorep, (struct packet *)0, | |
3882 | (struct lease *)0, client, | |
3883 | client -> sent_options, | |
3884 | (struct option_state *)0, | |
3885 | &global_scope, oc, MDL)) | |
98311e4b | 3886 | return ISC_R_SUCCESS; |
3dbe2246 | 3887 | |
d758ad8c TL |
3888 | /* If we set the "server, please update" flag, or didn't set it |
3889 | to false, don't do the update. */ | |
3890 | if (!(oc = lookup_option (&fqdn_universe, client -> sent_options, | |
3891 | FQDN_SERVER_UPDATE)) || | |
3892 | evaluate_boolean_option_cache (&ignorep, (struct packet *)0, | |
3893 | (struct lease *)0, client, | |
3894 | client -> sent_options, | |
3895 | (struct option_state *)0, | |
3896 | &global_scope, oc, MDL)) | |
98311e4b | 3897 | return ISC_R_SUCCESS; |
3dbe2246 | 3898 | |
d758ad8c | 3899 | /* If no FQDN option was supplied, don't do the update. */ |
d758ad8c TL |
3900 | if (!(oc = lookup_option (&fqdn_universe, client -> sent_options, |
3901 | FQDN_FQDN)) || | |
98bf1607 | 3902 | !evaluate_option_cache (&ddns_cb->fwd_name, (struct packet *)0, |
d758ad8c TL |
3903 | (struct lease *)0, client, |
3904 | client -> sent_options, | |
3905 | (struct option_state *)0, | |
3906 | &global_scope, oc, MDL)) | |
98311e4b | 3907 | return ISC_R_SUCCESS; |
d758ad8c | 3908 | |
98bd7ca0 DH |
3909 | /* If this is a DHCPv6 client update, make a dhcid string out of |
3910 | * the DUID. If this is a DHCPv4 client update, choose either | |
3911 | * the client identifier, if there is one, or the interface's | |
3912 | * MAC address. | |
3913 | */ | |
6705543f | 3914 | result = 0; |
98bd7ca0 DH |
3915 | memset(&client_identifier, 0, sizeof(client_identifier)); |
3916 | if (client->active_lease != NULL) { | |
3917 | if (((oc = | |
3918 | lookup_option(&dhcpv6_universe, client->sent_options, | |
3919 | D6O_CLIENTID)) != NULL) && | |
3920 | evaluate_option_cache(&client_identifier, NULL, NULL, | |
3921 | client, client->sent_options, NULL, | |
3922 | &global_scope, oc, MDL)) { | |
3923 | /* RFC4701 defines type '2' as being for the DUID | |
3924 | * field. We aren't using RFC4701 DHCID RR's yet, | |
3925 | * but this is as good a value as any. | |
3926 | */ | |
98bf1607 | 3927 | result = get_dhcid(&ddns_cb->dhcid, 2, |
98bd7ca0 DH |
3928 | client_identifier.data, |
3929 | client_identifier.len); | |
3930 | data_string_forget(&client_identifier, MDL); | |
3931 | } else | |
3932 | log_fatal("Impossible condition at %s:%d.", MDL); | |
3933 | } else { | |
3934 | if (((oc = | |
3935 | lookup_option(&dhcp_universe, client->sent_options, | |
3936 | DHO_DHCP_CLIENT_IDENTIFIER)) != NULL) && | |
3937 | evaluate_option_cache(&client_identifier, NULL, NULL, | |
3938 | client, client->sent_options, NULL, | |
3939 | &global_scope, oc, MDL)) { | |
98bf1607 | 3940 | result = get_dhcid(&ddns_cb->dhcid, |
98bd7ca0 DH |
3941 | DHO_DHCP_CLIENT_IDENTIFIER, |
3942 | client_identifier.data, | |
3943 | client_identifier.len); | |
3944 | data_string_forget(&client_identifier, MDL); | |
3945 | } else | |
98bf1607 | 3946 | result = get_dhcid(&ddns_cb->dhcid, 0, |
98bd7ca0 DH |
3947 | client->interface->hw_address.hbuf, |
3948 | client->interface->hw_address.hlen); | |
3949 | } | |
d758ad8c | 3950 | if (!result) { |
98311e4b | 3951 | return ISC_R_SUCCESS; |
d758ad8c TL |
3952 | } |
3953 | ||
d758ad8c TL |
3954 | /* |
3955 | * Perform updates. | |
3956 | */ | |
98bf1607 SR |
3957 | if (ddns_cb->fwd_name.len && ddns_cb->dhcid.len) { |
3958 | rcode = ddns_modify_fwd(ddns_cb); | |
98311e4b DH |
3959 | } else |
3960 | rcode = ISC_R_FAILURE; | |
3dbe2246 | 3961 | |
98bf1607 SR |
3962 | /* |
3963 | * A success from the modify routine means we are performing | |
3964 | * async processing, for which we use the timedout error message. | |
3965 | */ | |
3966 | if (rcode == ISC_R_SUCCESS) { | |
3967 | rcode = ISC_R_TIMEDOUT; | |
3968 | } | |
3969 | ||
98311e4b | 3970 | return rcode; |
d758ad8c | 3971 | } |
98bd7ca0 | 3972 | |
98bf1607 SR |
3973 | |
3974 | /* | |
3975 | * Schedule the first update. They will continue to retry occasionally | |
3976 | * until they no longer time out (or fail). | |
3977 | */ | |
3978 | void | |
3979 | dhclient_schedule_updates(struct client_state *client, | |
3980 | struct iaddr *addr, | |
3981 | int offset) | |
3982 | { | |
3983 | dhcp_ddns_cb_t *ddns_cb; | |
3984 | struct timeval tv; | |
3985 | ||
3986 | if (!client->config->do_forward_update) | |
3987 | return; | |
3988 | ||
3989 | /* cancel any outstanding ddns requests */ | |
3990 | if (client->ddns_cb != NULL) { | |
3991 | ddns_cancel(client->ddns_cb); | |
3992 | client->ddns_cb = NULL; | |
3993 | } | |
3994 | ||
3995 | ddns_cb = ddns_cb_alloc(MDL); | |
3996 | ||
3997 | if (ddns_cb != NULL) { | |
3998 | ddns_cb->lease = (void *)client; | |
3999 | ddns_cb->address = *addr; | |
4000 | ddns_cb->timeout = 1; | |
4001 | ||
4002 | /* | |
4003 | * XXX: DNS TTL is a problem we need to solve properly. | |
4004 | * Until that time, 300 is a placeholder default for | |
4005 | * something that is less insane than a value scaled | |
4006 | * by lease timeout. | |
4007 | */ | |
4008 | ddns_cb->ttl = 300; | |
4009 | ||
4010 | ddns_cb->state = DDNS_STATE_ADD_FW_NXDOMAIN; | |
4011 | ddns_cb->cur_func = client_dns_update_action; | |
4012 | ddns_cb->flags = DDNS_UPDATE_ADDR | DDNS_INCLUDE_RRSET; | |
4013 | ||
4014 | client->ddns_cb = ddns_cb; | |
4015 | ||
4016 | tv.tv_sec = cur_time + offset; | |
4017 | tv.tv_usec = 0; | |
4018 | add_timeout(&tv, client_dns_update_timeout, | |
4019 | ddns_cb, NULL, NULL); | |
4020 | } else { | |
4021 | log_error("Unable to allocate dns update state for %s", | |
4022 | piaddr(*addr)); | |
4023 | } | |
4024 | } | |
4025 | #endif | |
4026 | ||
98bd7ca0 DH |
4027 | void |
4028 | dhcpv4_client_assignments(void) | |
4029 | { | |
4030 | struct servent *ent; | |
4031 | ||
4032 | if (path_dhclient_pid == NULL) | |
4033 | path_dhclient_pid = _PATH_DHCLIENT_PID; | |
4034 | if (path_dhclient_db == NULL) | |
4035 | path_dhclient_db = _PATH_DHCLIENT_DB; | |
4036 | ||
4037 | /* Default to the DHCP/BOOTP port. */ | |
4038 | if (!local_port) { | |
4039 | /* If we're faking a relay agent, and we're not using loopback, | |
4040 | use the server port, not the client port. */ | |
4041 | if (mockup_relay && giaddr.s_addr != htonl (INADDR_LOOPBACK)) { | |
4042 | local_port = htons(67); | |
4043 | } else { | |
4044 | ent = getservbyname ("dhcpc", "udp"); | |
4045 | if (!ent) | |
4046 | local_port = htons (68); | |
4047 | else | |
4048 | local_port = ent -> s_port; | |
4049 | #ifndef __CYGWIN32__ | |
4050 | endservent (); | |
4051 | #endif | |
4052 | } | |
4053 | } | |
4054 | ||
4055 | /* If we're faking a relay agent, and we're not using loopback, | |
4056 | we're using the server port, not the client port. */ | |
4057 | if (mockup_relay && giaddr.s_addr != htonl (INADDR_LOOPBACK)) { | |
4058 | remote_port = local_port; | |
4059 | } else | |
4060 | remote_port = htons (ntohs (local_port) - 1); /* XXX */ | |
4061 | } | |
bea17697 SR |
4062 | |
4063 | /* | |
4064 | * The following routines are used to check that certain | |
4065 | * strings are reasonable before we pass them to the scripts. | |
4066 | * This avoids some problems with scripts treating the strings | |
4067 | * as commands - see ticket 23722 | |
4068 | * The domain checking code should be done as part of assembling | |
4069 | * the string but we are doing it here for now due to time | |
4070 | * constraints. | |
4071 | */ | |
4072 | ||
4073 | static int check_domain_name(const char *ptr, size_t len, int dots) | |
4074 | { | |
4075 | const char *p; | |
4076 | ||
4077 | /* not empty or complete length not over 255 characters */ | |
4078 | if ((len == 0) || (len > 256)) | |
4079 | return(-1); | |
4080 | ||
4081 | /* consists of [[:alnum:]-]+ labels separated by [.] */ | |
4082 | /* a [_] is against RFC but seems to be "widely used"... */ | |
4083 | for (p=ptr; (*p != 0) && (len-- > 0); p++) { | |
4084 | if ((*p == '-') || (*p == '_')) { | |
4085 | /* not allowed at begin or end of a label */ | |
4086 | if (((p - ptr) == 0) || (len == 0) || (p[1] == '.')) | |
4087 | return(-1); | |
4088 | } else if (*p == '.') { | |
4089 | /* each label has to be 1-63 characters; | |
4090 | we allow [.] at the end ('foo.bar.') */ | |
4091 | size_t d = p - ptr; | |
4092 | if ((d <= 0) || (d >= 64)) | |
4093 | return(-1); | |
4094 | ptr = p + 1; /* jump to the next label */ | |
4095 | if ((dots > 0) && (len > 0)) | |
4096 | dots--; | |
4097 | } else if (isalnum((unsigned char)*p) == 0) { | |
4098 | /* also numbers at the begin are fine */ | |
4099 | return(-1); | |
4100 | } | |
4101 | } | |
4102 | return(dots ? -1 : 0); | |
4103 | } | |
4104 | ||
4105 | static int check_domain_name_list(const char *ptr, size_t len, int dots) | |
4106 | { | |
4107 | const char *p; | |
4108 | int ret = -1; /* at least one needed */ | |
4109 | ||
4110 | if ((ptr == NULL) || (len == 0)) | |
4111 | return(-1); | |
4112 | ||
4113 | for (p=ptr; (*p != 0) && (len > 0); p++, len--) { | |
4114 | if (*p != ' ') | |
4115 | continue; | |
4116 | if (p > ptr) { | |
4117 | if (check_domain_name(ptr, p - ptr, dots) != 0) | |
4118 | return(-1); | |
4119 | ret = 0; | |
4120 | } | |
4121 | ptr = p + 1; | |
4122 | } | |
4123 | if (p > ptr) | |
4124 | return(check_domain_name(ptr, p - ptr, dots)); | |
4125 | else | |
4126 | return(ret); | |
4127 | } | |
4128 | ||
4129 | static int check_option_values(struct universe *universe, | |
4130 | unsigned int opt, | |
4131 | const char *ptr, | |
4132 | size_t len) | |
4133 | { | |
4134 | if (ptr == NULL) | |
4135 | return(-1); | |
4136 | ||
4137 | /* just reject options we want to protect, will be escaped anyway */ | |
4138 | if ((universe == NULL) || (universe == &dhcp_universe)) { | |
4139 | switch(opt) { | |
4140 | case DHO_HOST_NAME: | |
4141 | case DHO_DOMAIN_NAME: | |
4142 | case DHO_NIS_DOMAIN: | |
4143 | case DHO_NETBIOS_SCOPE: | |
4144 | return check_domain_name(ptr, len, 0); | |
4145 | break; | |
4146 | case DHO_DOMAIN_SEARCH: | |
4147 | return check_domain_name_list(ptr, len, 0); | |
4148 | break; | |
4149 | case DHO_ROOT_PATH: | |
4150 | if (len == 0) | |
4151 | return(-1); | |
4152 | for (; (*ptr != 0) && (len-- > 0); ptr++) { | |
4153 | if(!(isalnum((unsigned char)*ptr) || | |
4154 | *ptr == '#' || *ptr == '%' || | |
4155 | *ptr == '+' || *ptr == '-' || | |
4156 | *ptr == '_' || *ptr == ':' || | |
4157 | *ptr == '.' || *ptr == ',' || | |
4158 | *ptr == '@' || *ptr == '~' || | |
4159 | *ptr == '\\' || *ptr == '/' || | |
4160 | *ptr == '[' || *ptr == ']' || | |
4161 | *ptr == '=' || *ptr == ' ')) | |
4162 | return(-1); | |
4163 | } | |
4164 | return(0); | |
4165 | break; | |
4166 | } | |
4167 | } | |
4168 | ||
4169 | #ifdef DHCPv6 | |
4170 | if (universe == &dhcpv6_universe) { | |
4171 | switch(opt) { | |
4172 | case D6O_SIP_SERVERS_DNS: | |
4173 | case D6O_DOMAIN_SEARCH: | |
4174 | case D6O_NIS_DOMAIN_NAME: | |
4175 | case D6O_NISP_DOMAIN_NAME: | |
4176 | return check_domain_name_list(ptr, len, 0); | |
4177 | break; | |
4178 | } | |
4179 | } | |
4180 | #endif | |
4181 | ||
4182 | return(0); | |
4183 | } | |
4184 | ||
4185 | ||
4186 |