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Commit | Line | Data |
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d7837182 TL |
1 | /* dhcpd.c |
2 | ||
3 | DHCP Server Daemon. */ | |
4 | ||
5 | /* | |
7512d88b | 6 | * Copyright (c) 2004-2017 by Internet Systems Consortium, Inc. ("ISC") |
98311e4b | 7 | * Copyright (c) 1996-2003 by Internet Software Consortium |
d7837182 | 8 | * |
7512d88b TM |
9 | * This Source Code Form is subject to the terms of the Mozilla Public |
10 | * License, v. 2.0. If a copy of the MPL was not distributed with this | |
11 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. | |
d7837182 | 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. | |
d7837182 | 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/ |
49733f31 | 26 | * |
d7837182 TL |
27 | */ |
28 | ||
ae566556 | 29 | static const char copyright[] = |
fc4f62fe | 30 | "Copyright 2004-2017 Internet Systems Consortium."; |
ae566556 SR |
31 | static const char arr [] = "All rights reserved."; |
32 | static const char message [] = "Internet Systems Consortium DHCP Server"; | |
33 | static const char url [] = | |
2c85ac9b | 34 | "For info, please visit https://www.isc.org/software/dhcp/"; |
d7837182 TL |
35 | |
36 | #include "dhcpd.h" | |
68e50b9e | 37 | #include <omapip/omapip_p.h> |
fe5b0fdd | 38 | #include <syslog.h> |
47e8308d | 39 | #include <signal.h> |
a546f2a7 | 40 | #include <errno.h> |
e847f983 | 41 | #include <limits.h> |
28868515 | 42 | #include <sys/types.h> |
be62cf06 | 43 | #include <sys/time.h> |
7acd8753 | 44 | #include <isc/file.h> |
d7837182 | 45 | |
63971a83 DH |
46 | #if defined (PARANOIA) |
47 | # include <sys/types.h> | |
48 | # include <unistd.h> | |
49 | # include <pwd.h> | |
50 | /* get around the ISC declaration of group */ | |
51 | # define group real_group | |
52 | # include <grp.h> | |
53 | # undef group | |
7a6c9368 SR |
54 | |
55 | /* global values so db.c can look at them */ | |
56 | uid_t set_uid = 0; | |
57 | gid_t set_gid = 0; | |
63971a83 DH |
58 | #endif /* PARANOIA */ |
59 | ||
bf6f8fce FD |
60 | struct class unknown_class; |
61 | struct class known_class; | |
62 | ||
3b5a1486 TL |
63 | struct iaddr server_identifier; |
64 | int server_identifier_matched; | |
65 | ||
144cdb49 | 66 | #if defined (NSUPDATE) |
fafe8463 TL |
67 | |
68 | /* This stuff is always executed to figure the default values for certain | |
69 | ddns variables. */ | |
68f55908 | 70 | char std_nsupdate [] = " \n\ |
d7f6db15 | 71 | option server.ddns-hostname = \n\ |
d9b2a590 | 72 | pick (option fqdn.hostname, option host-name, config-option host-name); \n\ |
ac9c906a | 73 | option server.ddns-domainname = config-option domain-name; \n\ |
fafe8463 TL |
74 | option server.ddns-rev-domainname = \"in-addr.arpa.\";"; |
75 | ||
144cdb49 | 76 | #endif /* NSUPDATE */ |
98bf1607 | 77 | int ddns_update_style; |
cde11a4c | 78 | int dont_use_fsync = 0; /* 0 = default, use fsync, 1 = don't use fsync */ |
7116a34f | 79 | int server_id_check = 0; /* 0 = default, don't check server id, 1 = do check */ |
b53ba157 | 80 | int prefix_length_mode = PLM_PREFER; |
77222488 | 81 | |
347d4962 | 82 | int authoring_byte_order = 0; /* 0 = not set */ |
cc1bd34e | 83 | int lease_id_format = TOKEN_OCTAL; /* octal by default */ |
a5252220 | 84 | u_int32_t abandon_lease_time = DEFAULT_ABANDON_LEASE_TIME; |
347d4962 | 85 | |
b1b7b521 TL |
86 | const char *path_dhcpd_conf = _PATH_DHCPD_CONF; |
87 | const char *path_dhcpd_db = _PATH_DHCPD_DB; | |
88 | const char *path_dhcpd_pid = _PATH_DHCPD_PID; | |
4a5bfeac SR |
89 | /* False (default) => we write and use a pid file */ |
90 | isc_boolean_t no_pid_file = ISC_FALSE; | |
d7837182 | 91 | |
0a347607 TL |
92 | int dhcp_max_agent_option_packet_length = DHCP_MTU_MAX; |
93 | ||
49146f3c | 94 | static omapi_auth_key_t *omapi_key = (omapi_auth_key_t *)0; |
a920d3da TL |
95 | int omapi_port; |
96 | ||
97 | #if defined (TRACING) | |
98 | trace_type_t *trace_srandom; | |
99 | #endif | |
49146f3c | 100 | |
7acd8753 FD |
101 | char *progname; |
102 | ||
49146f3c DN |
103 | static isc_result_t verify_addr (omapi_object_t *l, omapi_addr_t *addr) { |
104 | return ISC_R_SUCCESS; | |
105 | } | |
106 | ||
107 | static isc_result_t verify_auth (omapi_object_t *p, omapi_auth_key_t *a) { | |
108 | if (a != omapi_key) | |
98bf1607 | 109 | return DHCP_R_INVALIDKEY; |
49146f3c DN |
110 | return ISC_R_SUCCESS; |
111 | } | |
112 | ||
d758ad8c TL |
113 | static void omapi_listener_start (void *foo) |
114 | { | |
115 | omapi_object_t *listener; | |
116 | isc_result_t result; | |
be62cf06 | 117 | struct timeval tv; |
d758ad8c TL |
118 | |
119 | listener = (omapi_object_t *)0; | |
120 | result = omapi_generic_new (&listener, MDL); | |
121 | if (result != ISC_R_SUCCESS) | |
122 | log_fatal ("Can't allocate new generic object: %s", | |
123 | isc_result_totext (result)); | |
124 | result = omapi_protocol_listen (listener, | |
125 | (unsigned)omapi_port, 1); | |
126 | if (result == ISC_R_SUCCESS && omapi_key) | |
127 | result = omapi_protocol_configure_security | |
128 | (listener, verify_addr, verify_auth); | |
129 | if (result != ISC_R_SUCCESS) { | |
130 | log_error ("Can't start OMAPI protocol: %s", | |
131 | isc_result_totext (result)); | |
5d082abd TM |
132 | tv.tv_sec = cur_tv.tv_sec + 5; |
133 | tv.tv_usec = cur_tv.tv_usec; | |
be62cf06 | 134 | add_timeout (&tv, omapi_listener_start, 0, 0, 0); |
d758ad8c TL |
135 | } |
136 | omapi_object_dereference (&listener, MDL); | |
137 | } | |
138 | ||
7a6c9368 SR |
139 | #ifndef UNIT_TEST |
140 | ||
68dfa910 FD |
141 | #define DHCPD_USAGE0 \ |
142 | "[-p <UDP port #>] [-f] [-d] [-q] [-t|-T]\n" | |
143 | ||
144 | #ifdef DHCPv6 | |
145 | #ifdef DHCP4o6 | |
146 | #define DHCPD_USAGE1 \ | |
147 | " [-4|-6] [-4o6 <port>]\n" \ | |
148 | " [-cf config-file] [-lf lease-file]\n" | |
149 | #else /* DHCP4o6 */ | |
150 | #define DHCPD_USAGE1 \ | |
151 | " [-4|-6] [-cf config-file] [-lf lease-file]\n" | |
152 | #endif /* DHCP4o6 */ | |
153 | #else /* !DHCPv6 */ | |
154 | #define DHCPD_USAGE1 \ | |
155 | " [-cf config-file] [-lf lease-file]\n" | |
156 | #endif /* DHCPv6 */ | |
157 | ||
158 | #if defined (PARANOIA) | |
159 | #define DHCPD_USAGEP \ | |
160 | " [-user user] [-group group] [-chroot dir]\n" | |
161 | #else | |
162 | #define DHCPD_USAGEP "" | |
163 | #endif /* PARANOIA */ | |
164 | ||
165 | #if defined (TRACING) | |
166 | #define DHCPD_USAGET \ | |
167 | " [-tf trace-output-file]\n" \ | |
168 | " [-play trace-input-file]\n" | |
169 | #else | |
170 | #define DHCPD_USAGET "" | |
171 | #endif /* TRACING */ | |
172 | ||
173 | #define DHCPD_USAGEC \ | |
174 | " [-pf pid-file] [--no-pid] [-s server]\n" \ | |
175 | " [if0 [...ifN]]" | |
176 | ||
177 | #define DHCPD_USAGEH "{--version|--help|-h}" | |
178 | ||
b2cb745b SR |
179 | /*! |
180 | * | |
181 | * \brief Print the generic usage message | |
182 | * | |
183 | * If the user has provided an incorrect command line print out | |
184 | * the description of the command line. The arguments provide | |
185 | * a way for the caller to request more specific information about | |
186 | * the error be printed as well. Mostly this will be that some | |
187 | * comamnd doesn't include its argument. | |
188 | * | |
189 | * \param sfmt - The basic string and format for the specific error | |
190 | * \param sarg - Generally the offending argument from the comamnd line. | |
191 | * | |
192 | * \return Nothing | |
193 | */ | |
194 | static char use_noarg[] = "No argument for command: %s "; | |
195 | ||
196 | static void | |
197 | usage(const char *sfmt, const char *sarg) { | |
198 | log_info("%s %s", message, PACKAGE_VERSION); | |
199 | log_info(copyright); | |
200 | log_info(arr); | |
fc4f62fe | 201 | log_info(url); |
b2cb745b SR |
202 | |
203 | /* If desired print out the specific error message */ | |
204 | #ifdef PRINT_SPECIFIC_CL_ERRORS | |
205 | if (sfmt != NULL) | |
206 | log_error(sfmt, sarg); | |
207 | #endif | |
208 | ||
68dfa910 FD |
209 | log_fatal("Usage: %s %s%s%s%s%s\n %s %s", |
210 | isc_file_basename(progname), | |
211 | DHCPD_USAGE0, | |
212 | DHCPD_USAGE1, | |
213 | DHCPD_USAGEP, | |
214 | DHCPD_USAGET, | |
215 | DHCPD_USAGEC, | |
216 | isc_file_basename(progname), | |
217 | DHCPD_USAGEH); | |
b2cb745b SR |
218 | } |
219 | ||
7a6c9368 SR |
220 | /* Note: If we add unit tests to test setup_chroot it will |
221 | * need to be moved to be outside the ifndef UNIT_TEST block. | |
222 | */ | |
223 | ||
63971a83 DH |
224 | #if defined (PARANOIA) |
225 | /* to be used in one of two possible scenarios */ | |
226 | static void setup_chroot (char *chroot_dir) { | |
227 | if (geteuid()) | |
228 | log_fatal ("you must be root to use chroot"); | |
229 | ||
230 | if (chroot(chroot_dir)) { | |
231 | log_fatal ("chroot(\"%s\"): %m", chroot_dir); | |
232 | } | |
233 | if (chdir ("/")) { | |
234 | /* probably permission denied */ | |
235 | log_fatal ("chdir(\"/\"): %m"); | |
236 | } | |
237 | } | |
238 | #endif /* PARANOIA */ | |
239 | ||
98bd7ca0 DH |
240 | int |
241 | main(int argc, char **argv) { | |
185d16f9 | 242 | int fd; |
c6dff01f | 243 | int i, status; |
d7837182 | 244 | struct servent *ent; |
28868515 | 245 | char *s; |
1ac5bc1a | 246 | int cftest = 0; |
8f450cac | 247 | int lftest = 0; |
d7837182 | 248 | int pid; |
c6dff01f | 249 | char pbuf [20]; |
001b9d53 | 250 | #ifndef DEBUG |
c6dff01f | 251 | int daemon = 1; |
29b23207 | 252 | int dfd[2] = { -1, -1 }; |
955d158b | 253 | #endif |
632d8396 | 254 | int quiet = 0; |
e3a84e35 | 255 | char *server = (char *)0; |
972bde18 | 256 | isc_result_t result; |
b1b7b521 | 257 | unsigned seed; |
972bde18 | 258 | struct interface_info *ip; |
98bf1607 | 259 | #if defined (NSUPDATE) |
77222488 TL |
260 | struct parse *parse; |
261 | int lose; | |
98bf1607 | 262 | #endif |
cfa7212d TL |
263 | int no_dhcpd_conf = 0; |
264 | int no_dhcpd_db = 0; | |
265 | int no_dhcpd_pid = 0; | |
c998be87 | 266 | #ifdef DHCPv6 |
98bd7ca0 | 267 | int local_family_set = 0; |
785c1a51 FD |
268 | #ifdef DHCP4o6 |
269 | u_int16_t dhcp4o6_port = 0; | |
270 | #endif /* DHCP4o6 */ | |
c998be87 | 271 | #endif /* DHCPv6 */ |
662df45a | 272 | #if defined (TRACING) |
a920d3da TL |
273 | char *traceinfile = (char *)0; |
274 | char *traceoutfile = (char *)0; | |
662df45a | 275 | #endif |
d7837182 | 276 | |
63971a83 DH |
277 | #if defined (PARANOIA) |
278 | char *set_user = 0; | |
279 | char *set_group = 0; | |
280 | char *set_chroot = 0; | |
63971a83 DH |
281 | #endif /* PARANOIA */ |
282 | ||
7acd8753 FD |
283 | #ifdef OLD_LOG_NAME |
284 | progname = "dhcpd"; | |
285 | #else | |
286 | progname = argv[0]; | |
287 | #endif | |
288 | ||
185d16f9 SK |
289 | /* Make sure that file descriptors 0 (stdin), 1, (stdout), and |
290 | 2 (stderr) are open. To do this, we assume that when we | |
20ae1aff | 291 | open a file the lowest available file descriptor is used. */ |
509df655 | 292 | fd = open("/dev/null", O_RDWR); |
185d16f9 | 293 | if (fd == 0) |
509df655 | 294 | fd = open("/dev/null", O_RDWR); |
185d16f9 | 295 | if (fd == 1) |
509df655 | 296 | fd = open("/dev/null", O_RDWR); |
185d16f9 SK |
297 | if (fd == 2) |
298 | log_perror = 0; /* No sense logging to /dev/null. */ | |
299 | else if (fd != -1) | |
509df655 | 300 | close(fd); |
fb5f8793 | 301 | |
29b23207 FD |
302 | /* Parse arguments changing daemon */ |
303 | for (i = 1; i < argc; i++) { | |
304 | if (!strcmp (argv [i], "-f")) { | |
305 | #ifndef DEBUG | |
306 | daemon = 0; | |
307 | #endif | |
308 | } else if (!strcmp (argv [i], "-d")) { | |
309 | #ifndef DEBUG | |
310 | daemon = 0; | |
311 | #endif | |
312 | } else if (!strcmp (argv [i], "-t")) { | |
313 | #ifndef DEBUG | |
314 | daemon = 0; | |
315 | #endif | |
316 | } else if (!strcmp (argv [i], "-T")) { | |
317 | #ifndef DEBUG | |
318 | daemon = 0; | |
319 | #endif | |
320 | } else if (!strcmp (argv [i], "--version")) { | |
321 | const char vstring[] = "isc-dhcpd-"; | |
322 | IGNORE_RET(write(STDERR_FILENO, vstring, | |
323 | strlen(vstring))); | |
324 | IGNORE_RET(write(STDERR_FILENO, | |
325 | PACKAGE_VERSION, | |
326 | strlen(PACKAGE_VERSION))); | |
327 | IGNORE_RET(write(STDERR_FILENO, "\n", 1)); | |
328 | exit (0); | |
68dfa910 FD |
329 | } else if (!strcmp(argv[i], "--help") || |
330 | !strcmp(argv[i], "-h")) { | |
331 | const char *pname = isc_file_basename(progname); | |
332 | IGNORE_RET(write(STDERR_FILENO, "Usage: ", 7)); | |
333 | IGNORE_RET(write(STDERR_FILENO, pname, strlen(pname))); | |
334 | IGNORE_RET(write(STDERR_FILENO, " ", 1)); | |
335 | IGNORE_RET(write(STDERR_FILENO, DHCPD_USAGE0, | |
336 | strlen(DHCPD_USAGE0))); | |
337 | IGNORE_RET(write(STDERR_FILENO, DHCPD_USAGE1, | |
338 | strlen(DHCPD_USAGE1))); | |
339 | #if defined (PARANOIA) | |
340 | IGNORE_RET(write(STDERR_FILENO, DHCPD_USAGEP, | |
341 | strlen(DHCPD_USAGEP))); | |
342 | #endif | |
343 | #if defined (TRACING) | |
344 | IGNORE_RET(write(STDERR_FILENO, DHCPD_USAGET, | |
345 | strlen(DHCPD_USAGET))); | |
346 | #endif | |
347 | IGNORE_RET(write(STDERR_FILENO, DHCPD_USAGEC, | |
348 | strlen(DHCPD_USAGEC))); | |
349 | IGNORE_RET(write(STDERR_FILENO, "\n", 1)); | |
350 | IGNORE_RET(write(STDERR_FILENO, " ", 7)); | |
351 | IGNORE_RET(write(STDERR_FILENO, pname, strlen(pname))); | |
352 | IGNORE_RET(write(STDERR_FILENO, " ", 1)); | |
353 | IGNORE_RET(write(STDERR_FILENO, DHCPD_USAGEH, | |
354 | strlen(DHCPD_USAGEH))); | |
355 | IGNORE_RET(write(STDERR_FILENO, "\n", 1)); | |
356 | exit(0); | |
29b23207 FD |
357 | #ifdef TRACING |
358 | } else if (!strcmp (argv [i], "-play")) { | |
359 | #ifndef DEBUG | |
360 | daemon = 0; | |
361 | #endif | |
362 | #endif | |
363 | } | |
364 | } | |
365 | ||
366 | #ifndef DEBUG | |
367 | /* When not forbidden prepare to become a daemon */ | |
368 | if (daemon) { | |
369 | if (pipe(dfd) == -1) | |
370 | log_fatal("Can't get pipe: %m"); | |
371 | if ((pid = fork ()) < 0) | |
372 | log_fatal("Can't fork daemon: %m"); | |
373 | if (pid != 0) { | |
374 | /* Parent: wait for the child to start */ | |
375 | int n; | |
376 | ||
377 | (void) close(dfd[1]); | |
378 | do { | |
379 | char buf; | |
380 | ||
381 | n = read(dfd[0], &buf, 1); | |
382 | if (n == 1) | |
383 | _exit((int)buf); | |
384 | } while (n == -1 && errno == EINTR); | |
385 | _exit(1); | |
386 | } | |
387 | /* Child */ | |
388 | (void) close(dfd[0]); | |
389 | } | |
390 | #endif | |
391 | ||
98bf1607 | 392 | /* Set up the isc and dns library managers */ |
61ef216b SR |
393 | status = dhcp_context_create(DHCP_CONTEXT_PRE_DB, |
394 | NULL, NULL); | |
98bf1607 SR |
395 | if (status != ISC_R_SUCCESS) |
396 | log_fatal("Can't initialize context: %s", | |
397 | isc_result_totext(status)); | |
398 | ||
f3a05d72 TL |
399 | /* Set up the client classification system. */ |
400 | classification_setup (); | |
401 | ||
402 | /* Initialize the omapi system. */ | |
403 | result = omapi_init (); | |
404 | if (result != ISC_R_SUCCESS) | |
405 | log_fatal ("Can't initialize OMAPI: %s", | |
406 | isc_result_totext (result)); | |
407 | ||
fafe8463 TL |
408 | /* Set up the OMAPI wrappers for common objects. */ |
409 | dhcp_db_objects_setup (); | |
f3a05d72 TL |
410 | /* Set up the OMAPI wrappers for various server database internal |
411 | objects. */ | |
f3a05d72 TL |
412 | dhcp_common_objects_setup (); |
413 | ||
c6dff01f | 414 | /* Initially, log errors to stderr as well as to syslogd. */ |
7acd8753 FD |
415 | openlog (isc_file_basename(progname), |
416 | DHCP_LOG_OPTIONS, DHCPD_LOG_FACILITY); | |
40950384 | 417 | |
d7837182 TL |
418 | for (i = 1; i < argc; i++) { |
419 | if (!strcmp (argv [i], "-p")) { | |
420 | if (++i == argc) | |
b2cb745b | 421 | usage(use_noarg, argv[i-1]); |
59112e84 | 422 | local_port = validate_port (argv [i]); |
8ae2d595 | 423 | log_debug ("binding to user-specified port %d", |
a60076f9 | 424 | ntohs (local_port)); |
c6dff01f TL |
425 | } else if (!strcmp (argv [i], "-f")) { |
426 | #ifndef DEBUG | |
29b23207 | 427 | /* daemon = 0; */ |
c6dff01f TL |
428 | #endif |
429 | } else if (!strcmp (argv [i], "-d")) { | |
77549355 | 430 | #ifndef DEBUG |
29b23207 | 431 | /* daemon = 0; */ |
77549355 | 432 | #endif |
f5d07a38 | 433 | log_perror = -1; |
e3a84e35 TL |
434 | } else if (!strcmp (argv [i], "-s")) { |
435 | if (++i == argc) | |
b2cb745b | 436 | usage(use_noarg, argv[i-1]); |
e3a84e35 | 437 | server = argv [i]; |
63971a83 DH |
438 | #if defined (PARANOIA) |
439 | } else if (!strcmp (argv [i], "-user")) { | |
440 | if (++i == argc) | |
b2cb745b | 441 | usage(use_noarg, argv[i-1]); |
63971a83 DH |
442 | set_user = argv [i]; |
443 | } else if (!strcmp (argv [i], "-group")) { | |
444 | if (++i == argc) | |
b2cb745b | 445 | usage(use_noarg, argv[i-1]); |
63971a83 DH |
446 | set_group = argv [i]; |
447 | } else if (!strcmp (argv [i], "-chroot")) { | |
448 | if (++i == argc) | |
b2cb745b | 449 | usage(use_noarg, argv[i-1]); |
63971a83 DH |
450 | set_chroot = argv [i]; |
451 | #endif /* PARANOIA */ | |
840bd203 TL |
452 | } else if (!strcmp (argv [i], "-cf")) { |
453 | if (++i == argc) | |
b2cb745b | 454 | usage(use_noarg, argv[i-1]); |
840bd203 | 455 | path_dhcpd_conf = argv [i]; |
cfa7212d | 456 | no_dhcpd_conf = 1; |
840bd203 TL |
457 | } else if (!strcmp (argv [i], "-lf")) { |
458 | if (++i == argc) | |
b2cb745b | 459 | usage(use_noarg, argv[i-1]); |
840bd203 | 460 | path_dhcpd_db = argv [i]; |
cfa7212d | 461 | no_dhcpd_db = 1; |
23b21725 TL |
462 | } else if (!strcmp (argv [i], "-pf")) { |
463 | if (++i == argc) | |
b2cb745b | 464 | usage(use_noarg, argv[i-1]); |
23b21725 | 465 | path_dhcpd_pid = argv [i]; |
cfa7212d | 466 | no_dhcpd_pid = 1; |
4a5bfeac SR |
467 | } else if (!strcmp(argv[i], "--no-pid")) { |
468 | no_pid_file = ISC_TRUE; | |
40f63fcd TL |
469 | } else if (!strcmp (argv [i], "-t")) { |
470 | /* test configurations only */ | |
471 | #ifndef DEBUG | |
29b23207 | 472 | /* daemon = 0; */ |
40f63fcd TL |
473 | #endif |
474 | cftest = 1; | |
475 | log_perror = -1; | |
8f450cac TL |
476 | } else if (!strcmp (argv [i], "-T")) { |
477 | /* test configurations and lease file only */ | |
478 | #ifndef DEBUG | |
29b23207 | 479 | /* daemon = 0; */ |
8f450cac TL |
480 | #endif |
481 | cftest = 1; | |
482 | lftest = 1; | |
483 | log_perror = -1; | |
deb0cb72 | 484 | } else if (!strcmp (argv [i], "-q")) { |
632d8396 TL |
485 | quiet = 1; |
486 | quiet_interface_discovery = 1; | |
75135a3f | 487 | #ifdef DHCPv6 |
98bd7ca0 DH |
488 | } else if (!strcmp(argv[i], "-4")) { |
489 | if (local_family_set && (local_family != AF_INET)) { | |
490 | log_fatal("Server cannot run in both IPv4 and " | |
491 | "IPv6 mode at the same time."); | |
492 | } | |
493 | local_family = AF_INET; | |
494 | local_family_set = 1; | |
495 | } else if (!strcmp(argv[i], "-6")) { | |
496 | if (local_family_set && (local_family != AF_INET6)) { | |
497 | log_fatal("Server cannot run in both IPv4 and " | |
498 | "IPv6 mode at the same time."); | |
499 | } | |
500 | local_family = AF_INET6; | |
501 | local_family_set = 1; | |
785c1a51 FD |
502 | #ifdef DHCP4o6 |
503 | } else if (!strcmp(argv[i], "-4o6")) { | |
504 | if (++i == argc) | |
505 | usage(use_noarg, argv[i-1]); | |
506 | dhcp4o6_port = validate_port_pair(argv[i]); | |
507 | ||
508 | log_debug("DHCPv4 over DHCPv6 over ::1 port %d and %d", | |
509 | ntohs(dhcp4o6_port), | |
510 | ntohs(dhcp4o6_port) + 1); | |
511 | dhcpv4_over_dhcpv6 = 1; | |
512 | #endif /* DHCP4o6 */ | |
75135a3f | 513 | #endif /* DHCPv6 */ |
662df45a | 514 | #if defined (TRACING) |
a920d3da TL |
515 | } else if (!strcmp (argv [i], "-tf")) { |
516 | if (++i == argc) | |
b2cb745b | 517 | usage(use_noarg, argv[i-1]); |
a920d3da TL |
518 | traceoutfile = argv [i]; |
519 | } else if (!strcmp (argv [i], "-play")) { | |
520 | if (++i == argc) | |
b2cb745b | 521 | usage(use_noarg, argv[i-1]); |
a920d3da TL |
522 | traceinfile = argv [i]; |
523 | trace_replay_init (); | |
662df45a | 524 | #endif /* TRACING */ |
d992e204 | 525 | } else if (argv [i][0] == '-') { |
b2cb745b | 526 | usage("Unknown command %s", argv[i]); |
d992e204 TL |
527 | } else { |
528 | struct interface_info *tmp = | |
f3a05d72 | 529 | (struct interface_info *)0; |
66be0ad1 SR |
530 | if (strlen(argv[i]) >= sizeof(tmp->name)) |
531 | log_fatal("%s: interface name too long " | |
532 | "(is %ld)", | |
533 | argv[i], (long)strlen(argv[i])); | |
f3a05d72 TL |
534 | result = interface_allocate (&tmp, MDL); |
535 | if (result != ISC_R_SUCCESS) | |
536 | log_fatal ("Insufficient memory to %s %s: %s", | |
537 | "record interface", argv [i], | |
538 | isc_result_totext (result)); | |
d992e204 | 539 | strcpy (tmp -> name, argv [i]); |
f3a05d72 TL |
540 | if (interfaces) { |
541 | interface_reference (&tmp -> next, | |
542 | interfaces, MDL); | |
543 | interface_dereference (&interfaces, MDL); | |
544 | } | |
545 | interface_reference (&interfaces, tmp, MDL); | |
d992e204 | 546 | tmp -> flags = INTERFACE_REQUESTED; |
d992e204 | 547 | } |
d7837182 TL |
548 | } |
549 | ||
785c1a51 FD |
550 | #if defined(DHCPv6) && defined(DHCP4o6) |
551 | if (dhcpv4_over_dhcpv6) { | |
552 | if (!local_family_set) | |
553 | log_error("please specify the address family " | |
554 | "with DHPv4 over DHCPv6 [-4|-6]."); | |
555 | if ((local_family == AF_INET) && (interfaces != NULL)) | |
556 | log_fatal("DHCPv4 server in DHPv4 over DHCPv6 " | |
557 | "mode with command line specified " | |
558 | "interfaces."); | |
559 | } | |
560 | #endif /* DHCPv6 && DHCP4o6 */ | |
561 | ||
cfa7212d TL |
562 | if (!no_dhcpd_conf && (s = getenv ("PATH_DHCPD_CONF"))) { |
563 | path_dhcpd_conf = s; | |
564 | } | |
75135a3f EH |
565 | |
566 | #ifdef DHCPv6 | |
567 | if (local_family == AF_INET6) { | |
568 | /* DHCPv6: override DHCPv4 lease and pid filenames */ | |
569 | if (!no_dhcpd_db) { | |
570 | if ((s = getenv ("PATH_DHCPD6_DB"))) | |
571 | path_dhcpd_db = s; | |
572 | else | |
573 | path_dhcpd_db = _PATH_DHCPD6_DB; | |
574 | } | |
575 | if (!no_dhcpd_pid) { | |
576 | if ((s = getenv ("PATH_DHCPD6_PID"))) | |
577 | path_dhcpd_pid = s; | |
578 | else | |
579 | path_dhcpd_pid = _PATH_DHCPD6_PID; | |
580 | } | |
581 | } else | |
582 | #else /* !DHCPv6 */ | |
583 | { | |
584 | if (!no_dhcpd_db && (s = getenv ("PATH_DHCPD_DB"))) { | |
585 | path_dhcpd_db = s; | |
586 | } | |
587 | if (!no_dhcpd_pid && (s = getenv ("PATH_DHCPD_PID"))) { | |
588 | path_dhcpd_pid = s; | |
589 | } | |
590 | } | |
591 | #endif /* DHCPv6 */ | |
cfa7212d | 592 | |
a546f2a7 EH |
593 | /* |
594 | * convert relative path names to absolute, for files that need | |
595 | * to be reopened after chdir() has been called | |
596 | */ | |
597 | if (path_dhcpd_db[0] != '/') { | |
32e651c4 SR |
598 | const char *path = path_dhcpd_db; |
599 | path_dhcpd_db = realpath(path_dhcpd_db, NULL); | |
a546f2a7 | 600 | if (path_dhcpd_db == NULL) |
32e651c4 SR |
601 | log_fatal("Failed to get realpath for %s: %s", path, |
602 | strerror(errno)); | |
a546f2a7 EH |
603 | } |
604 | ||
632d8396 | 605 | if (!quiet) { |
fe5b0fdd | 606 | log_info("%s %s", message, PACKAGE_VERSION); |
8ae2d595 TL |
607 | log_info (copyright); |
608 | log_info (arr); | |
8ae2d595 | 609 | log_info (url); |
77222488 | 610 | } else { |
77222488 TL |
611 | log_perror = 0; |
612 | } | |
c6dff01f | 613 | |
a920d3da TL |
614 | #if defined (TRACING) |
615 | trace_init (set_time, MDL); | |
98311e4b DH |
616 | if (traceoutfile) { |
617 | result = trace_begin (traceoutfile, MDL); | |
618 | if (result != ISC_R_SUCCESS) | |
619 | log_fatal ("Unable to begin trace: %s", | |
620 | isc_result_totext (result)); | |
621 | } | |
a920d3da TL |
622 | interface_trace_setup (); |
623 | parse_trace_setup (); | |
624 | trace_srandom = trace_type_register ("random-seed", (void *)0, | |
625 | trace_seed_input, | |
626 | trace_seed_stop, MDL); | |
158a34fb | 627 | #if defined (NSUPDATE) |
7aa153b8 | 628 | trace_ddns_init(); |
158a34fb | 629 | #endif /* NSUPDATE */ |
a920d3da TL |
630 | #endif |
631 | ||
63971a83 DH |
632 | #if defined (PARANOIA) |
633 | /* get user and group info if those options were given */ | |
634 | if (set_user) { | |
635 | struct passwd *tmp_pwd; | |
636 | ||
637 | if (geteuid()) | |
638 | log_fatal ("you must be root to set user"); | |
639 | ||
640 | if (!(tmp_pwd = getpwnam(set_user))) | |
641 | log_fatal ("no such user: %s", set_user); | |
642 | ||
643 | set_uid = tmp_pwd->pw_uid; | |
644 | ||
645 | /* use the user's group as the default gid */ | |
646 | if (!set_group) | |
647 | set_gid = tmp_pwd->pw_gid; | |
648 | } | |
649 | ||
650 | if (set_group) { | |
651 | /* get around the ISC declaration of group */ | |
652 | #define group real_group | |
653 | struct group *tmp_grp; | |
654 | ||
655 | if (geteuid()) | |
656 | log_fatal ("you must be root to set group"); | |
657 | ||
658 | if (!(tmp_grp = getgrnam(set_group))) | |
659 | log_fatal ("no such group: %s", set_group); | |
660 | ||
661 | set_gid = tmp_grp->gr_gid; | |
662 | #undef group | |
663 | } | |
664 | ||
665 | # if defined (EARLY_CHROOT) | |
666 | if (set_chroot) setup_chroot (set_chroot); | |
667 | # endif /* EARLY_CHROOT */ | |
668 | #endif /* PARANOIA */ | |
669 | ||
d7837182 | 670 | /* Default to the DHCP/BOOTP port. */ |
a60076f9 | 671 | if (!local_port) |
d7837182 | 672 | { |
a920d3da | 673 | if ((s = getenv ("DHCPD_PORT"))) { |
59112e84 | 674 | local_port = validate_port (s); |
a920d3da TL |
675 | log_debug ("binding to environment-specified port %d", |
676 | ntohs (local_port)); | |
677 | } else { | |
98bd7ca0 DH |
678 | if (local_family == AF_INET) { |
679 | ent = getservbyname("dhcp", "udp"); | |
680 | if (ent == NULL) { | |
681 | local_port = htons(67); | |
682 | } else { | |
683 | local_port = ent->s_port; | |
684 | } | |
685 | } else { | |
686 | /* INSIST(local_family == AF_INET6); */ | |
687 | ent = getservbyname("dhcpv6-server", "udp"); | |
688 | if (ent == NULL) { | |
689 | local_port = htons(547); | |
690 | } else { | |
691 | local_port = ent->s_port; | |
692 | } | |
693 | } | |
1e39d101 | 694 | #ifndef __CYGWIN32__ /* XXX */ |
a920d3da | 695 | endservent (); |
1e39d101 | 696 | #endif |
a920d3da | 697 | } |
d7837182 TL |
698 | } |
699 | ||
98bd7ca0 DH |
700 | if (local_family == AF_INET) { |
701 | remote_port = htons(ntohs(local_port) + 1); | |
702 | } else { | |
703 | /* INSIST(local_family == AF_INET6); */ | |
704 | ent = getservbyname("dhcpv6-client", "udp"); | |
705 | if (ent == NULL) { | |
706 | remote_port = htons(546); | |
707 | } else { | |
708 | remote_port = ent->s_port; | |
709 | } | |
710 | } | |
a60076f9 | 711 | |
e3a84e35 | 712 | if (server) { |
2e13ba55 SK |
713 | if (local_family != AF_INET) { |
714 | log_fatal("You can only specify address to send " | |
715 | "replies to when running an IPv4 server."); | |
716 | } | |
e3a84e35 TL |
717 | if (!inet_aton (server, &limited_broadcast)) { |
718 | struct hostent *he; | |
719 | he = gethostbyname (server); | |
720 | if (he) { | |
721 | memcpy (&limited_broadcast, | |
722 | he -> h_addr_list [0], | |
723 | sizeof limited_broadcast); | |
724 | } else | |
725 | limited_broadcast.s_addr = INADDR_BROADCAST; | |
726 | } | |
727 | } else { | |
728 | limited_broadcast.s_addr = INADDR_BROADCAST; | |
729 | } | |
730 | ||
d7837182 | 731 | /* Get the current time... */ |
be62cf06 | 732 | gettimeofday(&cur_tv, NULL); |
d7837182 | 733 | |
77222488 TL |
734 | /* Set up the initial dhcp option universe. */ |
735 | initialize_common_option_spaces (); | |
736 | initialize_server_option_spaces (); | |
737 | ||
fafe8463 TL |
738 | /* Add the ddns update style enumeration prior to parsing. */ |
739 | add_enumeration (&ddns_styles); | |
ee5a7404 | 740 | add_enumeration (&syslog_enum); |
33692791 DH |
741 | #if defined (LDAP_CONFIGURATION) |
742 | add_enumeration (&ldap_methods); | |
743 | #if defined (LDAP_USE_SSL) | |
744 | add_enumeration (&ldap_ssl_usage_enum); | |
745 | add_enumeration (&ldap_tls_reqcert_enum); | |
746 | add_enumeration (&ldap_tls_crlcheck_enum); | |
747 | #endif | |
748 | #endif | |
fafe8463 | 749 | |
20916cae TL |
750 | if (!group_allocate (&root_group, MDL)) |
751 | log_fatal ("Can't allocate root group!"); | |
752 | root_group -> authoritative = 0; | |
77222488 | 753 | |
a920d3da TL |
754 | /* Set up various hooks. */ |
755 | dhcp_interface_setup_hook = dhcpd_interface_setup_hook; | |
756 | bootp_packet_handler = do_packet; | |
fe5b0fdd | 757 | #ifdef DHCPv6 |
1a006ff6 | 758 | add_enumeration (&prefix_length_modes); |
98bd7ca0 | 759 | dhcpv6_packet_handler = do_packet6; |
fe5b0fdd | 760 | #endif /* DHCPv6 */ |
a920d3da | 761 | |
144cdb49 | 762 | #if defined (NSUPDATE) |
77222488 | 763 | /* Set up the standard name service updater routine. */ |
c40e954c EH |
764 | parse = NULL; |
765 | status = new_parse(&parse, -1, std_nsupdate, sizeof(std_nsupdate) - 1, | |
dc66a995 | 766 | "standard name service update routine", 0); |
77222488 | 767 | if (status != ISC_R_SUCCESS) |
d8e1567c | 768 | log_fatal ("can't begin parsing name service updater!"); |
77222488 | 769 | |
c40e954c EH |
770 | if (parse != NULL) { |
771 | lose = 0; | |
772 | if (!(parse_executable_statements(&root_group->statements, | |
773 | parse, &lose, context_any))) { | |
774 | end_parse(&parse); | |
775 | log_fatal("can't parse standard name service updater!"); | |
776 | } | |
777 | end_parse(&parse); | |
77222488 | 778 | } |
144cdb49 | 779 | #endif |
77222488 | 780 | |
a920d3da | 781 | /* Initialize icmp support... */ |
30a122ee TL |
782 | if (!cftest && !lftest) |
783 | icmp_startup (1, lease_pinged); | |
a920d3da TL |
784 | |
785 | #if defined (TRACING) | |
786 | if (traceinfile) { | |
787 | if (!no_dhcpd_db) { | |
788 | log_error ("%s", ""); | |
789 | log_error ("** You must specify a lease file with -lf."); | |
790 | log_error (" Dhcpd will not overwrite your default"); | |
791 | log_fatal (" lease file when playing back a trace. **"); | |
792 | } | |
793 | trace_file_replay (traceinfile); | |
d758ad8c | 794 | |
98311e4b | 795 | #if defined (DEBUG_MEMORY_LEAKAGE) && \ |
d758ad8c TL |
796 | defined (DEBUG_MEMORY_LEAKAGE_ON_EXIT) |
797 | free_everything (); | |
798 | omapi_print_dmalloc_usage_by_caller (); | |
799 | #endif | |
800 | ||
a920d3da TL |
801 | exit (0); |
802 | } | |
803 | #endif | |
804 | ||
98bd7ca0 | 805 | #ifdef DHCPv6 |
1d9774ab | 806 | /* set up DHCPv6 hashes */ |
9322442f | 807 | if (!ia_new_hash(&ia_na_active, DEFAULT_HASH_SIZE, MDL)) { |
1d9774ab FD |
808 | log_fatal("Out of memory creating hash for active IA_NA."); |
809 | } | |
9322442f | 810 | if (!ia_new_hash(&ia_ta_active, DEFAULT_HASH_SIZE, MDL)) { |
1d9774ab FD |
811 | log_fatal("Out of memory creating hash for active IA_TA."); |
812 | } | |
9322442f | 813 | if (!ia_new_hash(&ia_pd_active, DEFAULT_HASH_SIZE, MDL)) { |
1d9774ab | 814 | log_fatal("Out of memory creating hash for active IA_PD."); |
98bd7ca0 DH |
815 | } |
816 | #endif /* DHCPv6 */ | |
817 | ||
d7837182 | 818 | /* Read the dhcpd.conf file... */ |
8f450cac | 819 | if (readconf () != ISC_R_SUCCESS) |
8ae2d595 | 820 | log_fatal ("Configuration file errors encountered -- exiting"); |
d7837182 | 821 | |
d758ad8c | 822 | postconf_initialization (quiet); |
3956569b | 823 | |
6ec59010 TM |
824 | #if defined (FAILOVER_PROTOCOL) |
825 | dhcp_failover_sanity_check(); | |
826 | #endif | |
827 | ||
785c1a51 FD |
828 | #if defined(DHCPv6) && defined(DHCP4o6) |
829 | if (dhcpv4_over_dhcpv6) { | |
830 | if ((local_family == AF_INET) && (interfaces != NULL)) | |
831 | log_fatal("DHCPv4 server in DHPv4 over DHCPv6 " | |
832 | "mode with config file specified " | |
833 | "interfaces."); | |
834 | } | |
835 | #endif /* DHCPv6 && DHCP4o6 */ | |
836 | ||
63971a83 DH |
837 | #if defined (PARANOIA) && !defined (EARLY_CHROOT) |
838 | if (set_chroot) setup_chroot (set_chroot); | |
839 | #endif /* PARANOIA && !EARLY_CHROOT */ | |
d758ad8c | 840 | |
fb98e02e TM |
841 | #ifdef DHCPv6 |
842 | /* log info about ipv6_ponds with large address ranges */ | |
843 | report_jumbo_ranges(); | |
844 | #endif | |
845 | ||
40f63fcd | 846 | /* test option should cause an early exit */ |
8f450cac | 847 | if (cftest && !lftest) |
40f63fcd TL |
848 | exit(0); |
849 | ||
992dc765 SR |
850 | /* |
851 | * First part of dealing with pid files. Check to see if | |
852 | * we should continue running or not. We run if: | |
853 | * - we are testing the lease file out | |
854 | * - we don't have a pid file to check | |
855 | * - there is no other process running | |
856 | */ | |
857 | if ((lftest == 0) && (no_pid_file == ISC_FALSE)) { | |
858 | /*Read previous pid file. */ | |
859 | if ((i = open(path_dhcpd_pid, O_RDONLY)) >= 0) { | |
860 | status = read(i, pbuf, (sizeof pbuf) - 1); | |
861 | close(i); | |
862 | if (status > 0) { | |
863 | pbuf[status] = 0; | |
864 | pid = atoi(pbuf); | |
865 | ||
866 | /* | |
867 | * If there was a previous server process and | |
868 | * it is still running, abort | |
869 | */ | |
870 | if (!pid || | |
871 | (pid != getpid() && kill(pid, 0) == 0)) | |
872 | log_fatal("There's already a " | |
873 | "DHCP server running."); | |
874 | } | |
875 | } | |
876 | } | |
877 | ||
a920d3da TL |
878 | group_write_hook = group_writer; |
879 | ||
880 | /* Start up the database... */ | |
881 | db_startup (lftest); | |
882 | ||
883 | if (lftest) | |
884 | exit (0); | |
885 | ||
886 | /* Discover all the network interfaces and initialize them. */ | |
785c1a51 FD |
887 | #if defined(DHCPv6) && defined(DHCP4o6) |
888 | if (dhcpv4_over_dhcpv6) { | |
889 | int real_family = local_family; | |
890 | local_family = AF_INET6; | |
891 | /* The DHCPv4 side of DHCPv4-over-DHCPv6 service | |
892 | uses a specific discovery which doesn't register | |
893 | DHCPv6 sockets. */ | |
894 | if (real_family == AF_INET) | |
895 | discover_interfaces(DISCOVER_SERVER46); | |
896 | else | |
897 | discover_interfaces(DISCOVER_SERVER); | |
898 | local_family = real_family; | |
899 | } else | |
900 | #endif /* DHCPv6 && DHCP4o6 */ | |
98bd7ca0 DH |
901 | discover_interfaces(DISCOVER_SERVER); |
902 | ||
903 | #ifdef DHCPv6 | |
904 | /* | |
905 | * Remove addresses from our pools that we should not issue | |
906 | * to clients. | |
c61eba3b SK |
907 | * |
908 | * We currently have no support for this in IPv4. It is not | |
909 | * as important in IPv4, as making pools with ranges that | |
910 | * leave out interfaces and hosts is fairly straightforward | |
911 | * using range notation, but not so handy with CIDR notation. | |
98bd7ca0 | 912 | */ |
c61eba3b SK |
913 | if (local_family == AF_INET6) { |
914 | mark_hosts_unavailable(); | |
80c9fdb0 | 915 | mark_phosts_unavailable(); |
c61eba3b SK |
916 | mark_interfaces_unavailable(); |
917 | } | |
98bd7ca0 DH |
918 | #endif /* DHCPv6 */ |
919 | ||
a920d3da TL |
920 | /* Make up a seed for the random number generator from current |
921 | time plus the sum of the last four bytes of each | |
922 | interface's hardware address interpreted as an integer. | |
923 | Not much entropy, but we're booting, so we're not likely to | |
924 | find anything better. */ | |
925 | seed = 0; | |
926 | for (ip = interfaces; ip; ip = ip -> next) { | |
927 | int junk; | |
928 | memcpy (&junk, | |
929 | &ip -> hw_address.hbuf [ip -> hw_address.hlen - | |
930 | sizeof seed], sizeof seed); | |
931 | seed += junk; | |
932 | } | |
933 | srandom (seed + cur_time); | |
934 | #if defined (TRACING) | |
935 | trace_seed_stash (trace_srandom, seed + cur_time); | |
936 | #endif | |
d758ad8c | 937 | postdb_startup (); |
a920d3da | 938 | |
fe5b0fdd | 939 | #ifdef DHCPv6 |
98bd7ca0 | 940 | /* |
90a062fb SR |
941 | * Set server DHCPv6 identifier - we go in order: |
942 | * dhcp6.server-id in the config file | |
943 | * server-duid from the lease file | |
944 | * server-duid from the config file (the config file is read first | |
945 | * and the lease file overwrites the config file information) | |
785c1a51 | 946 | * generate a new one from the interface hardware addresses. |
90a062fb | 947 | * In all cases we write it out to the lease file. |
98bd7ca0 DH |
948 | * See dhcpv6.c for discussion of setting DUID. |
949 | */ | |
90a062fb SR |
950 | if ((set_server_duid_from_option() != ISC_R_SUCCESS) && |
951 | (!server_duid_isset()) && | |
952 | (generate_new_server_duid() != ISC_R_SUCCESS)) { | |
953 | log_fatal("Unable to set server identifier."); | |
98bd7ca0 | 954 | } |
90a062fb | 955 | write_server_duid(); |
785c1a51 FD |
956 | #ifdef DHCP4o6 |
957 | if (dhcpv4_over_dhcpv6) | |
958 | dhcp4o6_setup(dhcp4o6_port); | |
959 | #endif /* DHCP4o6 */ | |
fe5b0fdd | 960 | #endif /* DHCPv6 */ |
98bd7ca0 | 961 | |
a920d3da | 962 | #ifndef DEBUG |
4a5bfeac | 963 | /* |
992dc765 SR |
964 | * Second part of dealing with pid files. Now |
965 | * that we have forked we can write our pid if | |
966 | * appropriate. | |
4a5bfeac SR |
967 | */ |
968 | if (no_pid_file == ISC_FALSE) { | |
4a5bfeac SR |
969 | i = open(path_dhcpd_pid, O_WRONLY|O_CREAT|O_TRUNC, 0644); |
970 | if (i >= 0) { | |
971 | sprintf(pbuf, "%d\n", (int) getpid()); | |
992dc765 | 972 | IGNORE_RET(write(i, pbuf, strlen(pbuf))); |
4a5bfeac SR |
973 | close(i); |
974 | } else { | |
975 | log_error("Can't create PID file %s: %m.", | |
976 | path_dhcpd_pid); | |
977 | } | |
978 | } | |
182b187e | 979 | |
d8c7c34e SR |
980 | #if defined (PARANOIA) |
981 | /* change uid to the specified one */ | |
982 | ||
983 | if (set_gid) { | |
984 | if (setgroups (0, (void *)0)) | |
985 | log_fatal ("setgroups: %m"); | |
986 | if (setgid (set_gid)) | |
987 | log_fatal ("setgid(%d): %m", (int) set_gid); | |
988 | } | |
989 | ||
990 | if (set_uid) { | |
991 | if (setuid (set_uid)) | |
992 | log_fatal ("setuid(%d): %m", (int) set_uid); | |
993 | } | |
994 | #endif /* PARANOIA */ | |
995 | ||
a920d3da TL |
996 | /* If we were requested to log to stdout on the command line, |
997 | keep doing so; otherwise, stop. */ | |
998 | if (log_perror == -1) | |
999 | log_perror = 1; | |
1000 | else | |
1001 | log_perror = 0; | |
1002 | ||
1003 | if (daemon) { | |
29b23207 FD |
1004 | if (dfd[0] != -1 && dfd[1] != -1) { |
1005 | char buf = 0; | |
1006 | ||
1007 | if (write(dfd[1], &buf, 1) != 1) | |
1008 | log_fatal("write to parent: %m"); | |
1009 | (void) close(dfd[1]); | |
1010 | dfd[0] = dfd[1] = -1; | |
1011 | } | |
1012 | ||
a920d3da | 1013 | /* Become session leader and get pid... */ |
dc9d7b08 | 1014 | (void) setsid(); |
185d16f9 SK |
1015 | |
1016 | /* Close standard I/O descriptors. */ | |
dc9d7b08 MA |
1017 | (void) close(0); |
1018 | (void) close(1); | |
1019 | (void) close(2); | |
185d16f9 SK |
1020 | |
1021 | /* Reopen them on /dev/null. */ | |
dc9d7b08 MA |
1022 | (void) open("/dev/null", O_RDWR); |
1023 | (void) open("/dev/null", O_RDWR); | |
1024 | (void) open("/dev/null", O_RDWR); | |
185d16f9 | 1025 | log_perror = 0; /* No sense logging to /dev/null. */ |
a920d3da | 1026 | |
ae566556 | 1027 | IGNORE_RET (chdir("/")); |
a920d3da TL |
1028 | } |
1029 | #endif /* !DEBUG */ | |
1030 | ||
d758ad8c TL |
1031 | #if defined (DEBUG_MEMORY_LEAKAGE) || defined (DEBUG_MALLOC_POOL) || \ |
1032 | defined (DEBUG_MEMORY_LEAKAGE_ON_EXIT) | |
a920d3da TL |
1033 | dmalloc_cutoff_generation = dmalloc_generation; |
1034 | dmalloc_longterm = dmalloc_outstanding; | |
1035 | dmalloc_outstanding = 0; | |
1036 | #endif | |
1037 | ||
d758ad8c TL |
1038 | omapi_set_int_value ((omapi_object_t *)dhcp_control_object, |
1039 | (omapi_object_t *)0, "state", server_running); | |
1040 | ||
e9326fd0 SR |
1041 | #if defined(ENABLE_GENTLE_SHUTDOWN) |
1042 | /* no signal handlers until we deal with the side effects */ | |
47e8308d SR |
1043 | /* install signal handlers */ |
1044 | signal(SIGINT, dhcp_signal_handler); /* control-c */ | |
1045 | signal(SIGTERM, dhcp_signal_handler); /* kill */ | |
e9326fd0 | 1046 | #endif |
47e8308d | 1047 | |
f88446f1 SR |
1048 | /* Log that we are about to start working */ |
1049 | log_info("Server starting service."); | |
1050 | ||
47e8308d SR |
1051 | /* |
1052 | * Receive packets and dispatch them... | |
0895c955 | 1053 | * dispatch() will never return. |
47e8308d | 1054 | */ |
a920d3da TL |
1055 | dispatch (); |
1056 | ||
47e8308d | 1057 | /* Let's return status code */ |
a920d3da TL |
1058 | return 0; |
1059 | } | |
98bd7ca0 | 1060 | #endif /* !UNIT_TEST */ |
a920d3da TL |
1061 | |
1062 | void postconf_initialization (int quiet) | |
1063 | { | |
cde11a4c | 1064 | struct option_state *options = NULL; |
a920d3da TL |
1065 | struct data_string db; |
1066 | struct option_cache *oc; | |
1067 | char *s; | |
1068 | isc_result_t result; | |
a920d3da | 1069 | int tmp; |
61ef216b SR |
1070 | #if defined (NSUPDATE) |
1071 | struct in_addr local4, *local4_ptr = NULL; | |
1072 | struct in6_addr local6, *local6_ptr = NULL; | |
1073 | #endif | |
a920d3da | 1074 | |
b62e4418 | 1075 | /* Now try to get the lease file name. */ |
cde11a4c | 1076 | option_state_allocate(&options, MDL); |
b62e4418 | 1077 | |
a7341359 SR |
1078 | execute_statements_in_scope(NULL, NULL, NULL, NULL, NULL, |
1079 | options, &global_scope, root_group, | |
1080 | NULL, NULL); | |
cde11a4c SR |
1081 | memset(&db, 0, sizeof db); |
1082 | oc = lookup_option(&server_universe, options, SV_LEASE_FILE_NAME); | |
b62e4418 | 1083 | if (oc && |
cde11a4c SR |
1084 | evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, |
1085 | &global_scope, oc, MDL)) { | |
1086 | s = dmalloc(db.len + 1, MDL); | |
b62e4418 | 1087 | if (!s) |
cde11a4c SR |
1088 | log_fatal("no memory for lease db filename."); |
1089 | memcpy(s, db.data, db.len); | |
1090 | s[db.len] = 0; | |
1091 | data_string_forget(&db, MDL); | |
b62e4418 TL |
1092 | path_dhcpd_db = s; |
1093 | } | |
75135a3f | 1094 | |
cde11a4c | 1095 | oc = lookup_option(&server_universe, options, SV_PID_FILE_NAME); |
b62e4418 | 1096 | if (oc && |
cde11a4c SR |
1097 | evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, |
1098 | &global_scope, oc, MDL)) { | |
1099 | s = dmalloc(db.len + 1, MDL); | |
b62e4418 | 1100 | if (!s) |
cde11a4c SR |
1101 | log_fatal("no memory for pid filename."); |
1102 | memcpy(s, db.data, db.len); | |
1103 | s[db.len] = 0; | |
1104 | data_string_forget(&db, MDL); | |
b62e4418 TL |
1105 | path_dhcpd_pid = s; |
1106 | } | |
1107 | ||
75135a3f EH |
1108 | #ifdef DHCPv6 |
1109 | if (local_family == AF_INET6) { | |
1110 | /* | |
1111 | * Override lease file name with dhcpv6 lease file name, | |
1112 | * if it was set; then, do the same with the pid file name | |
1113 | */ | |
1114 | oc = lookup_option(&server_universe, options, | |
1115 | SV_DHCPV6_LEASE_FILE_NAME); | |
1116 | if (oc && | |
cde11a4c SR |
1117 | evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, |
1118 | &global_scope, oc, MDL)) { | |
1119 | s = dmalloc(db.len + 1, MDL); | |
75135a3f | 1120 | if (!s) |
cde11a4c SR |
1121 | log_fatal("no memory for lease db filename."); |
1122 | memcpy(s, db.data, db.len); | |
1123 | s[db.len] = 0; | |
1124 | data_string_forget(&db, MDL); | |
75135a3f EH |
1125 | path_dhcpd_db = s; |
1126 | } | |
1127 | ||
1128 | oc = lookup_option(&server_universe, options, | |
1129 | SV_DHCPV6_PID_FILE_NAME); | |
1130 | if (oc && | |
cde11a4c SR |
1131 | evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, |
1132 | &global_scope, oc, MDL)) { | |
1133 | s = dmalloc(db.len + 1, MDL); | |
75135a3f | 1134 | if (!s) |
cde11a4c SR |
1135 | log_fatal("no memory for pid filename."); |
1136 | memcpy(s, db.data, db.len); | |
1137 | s[db.len] = 0; | |
1138 | data_string_forget(&db, MDL); | |
75135a3f EH |
1139 | path_dhcpd_pid = s; |
1140 | } | |
1141 | } | |
1142 | #endif /* DHCPv6 */ | |
1143 | ||
312a6a35 | 1144 | omapi_port = -1; |
cde11a4c | 1145 | oc = lookup_option(&server_universe, options, SV_OMAPI_PORT); |
ece9e253 | 1146 | if (oc && |
cde11a4c SR |
1147 | evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, |
1148 | &global_scope, oc, MDL)) { | |
ece9e253 | 1149 | if (db.len == 2) { |
cde11a4c | 1150 | omapi_port = getUShort(db.data); |
ece9e253 | 1151 | } else |
cde11a4c SR |
1152 | log_fatal("invalid omapi port data length"); |
1153 | data_string_forget(&db, MDL); | |
ece9e253 TL |
1154 | } |
1155 | ||
cde11a4c | 1156 | oc = lookup_option(&server_universe, options, SV_OMAPI_KEY); |
49146f3c | 1157 | if (oc && |
cde11a4c SR |
1158 | evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, |
1159 | &global_scope, oc, MDL)) { | |
1160 | s = dmalloc(db.len + 1, MDL); | |
49146f3c | 1161 | if (!s) |
cde11a4c SR |
1162 | log_fatal("no memory for OMAPI key filename."); |
1163 | memcpy(s, db.data, db.len); | |
1164 | s[db.len] = 0; | |
1165 | data_string_forget(&db, MDL); | |
1166 | result = omapi_auth_key_lookup_name(&omapi_key, s); | |
1167 | dfree(s, MDL); | |
49146f3c | 1168 | if (result != ISC_R_SUCCESS) |
cde11a4c SR |
1169 | log_fatal("OMAPI key %s: %s", |
1170 | s, isc_result_totext (result)); | |
49146f3c DN |
1171 | } |
1172 | ||
cde11a4c | 1173 | oc = lookup_option(&server_universe, options, SV_LOCAL_PORT); |
ece9e253 | 1174 | if (oc && |
cde11a4c SR |
1175 | evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, |
1176 | &global_scope, oc, MDL)) { | |
ece9e253 | 1177 | if (db.len == 2) { |
cde11a4c | 1178 | local_port = htons(getUShort (db.data)); |
ece9e253 | 1179 | } else |
cde11a4c SR |
1180 | log_fatal("invalid local port data length"); |
1181 | data_string_forget(&db, MDL); | |
ece9e253 TL |
1182 | } |
1183 | ||
cde11a4c | 1184 | oc = lookup_option(&server_universe, options, SV_REMOTE_PORT); |
ece9e253 | 1185 | if (oc && |
cde11a4c SR |
1186 | evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, |
1187 | &global_scope, oc, MDL)) { | |
ece9e253 | 1188 | if (db.len == 2) { |
cde11a4c | 1189 | remote_port = htons(getUShort (db.data)); |
ece9e253 | 1190 | } else |
cde11a4c SR |
1191 | log_fatal("invalid remote port data length"); |
1192 | data_string_forget(&db, MDL); | |
ece9e253 TL |
1193 | } |
1194 | ||
cde11a4c SR |
1195 | oc = lookup_option(&server_universe, options, |
1196 | SV_LIMITED_BROADCAST_ADDRESS); | |
ece9e253 | 1197 | if (oc && |
cde11a4c SR |
1198 | evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, |
1199 | &global_scope, oc, MDL)) { | |
ece9e253 | 1200 | if (db.len == 4) { |
cde11a4c | 1201 | memcpy(&limited_broadcast, db.data, 4); |
ece9e253 | 1202 | } else |
cde11a4c SR |
1203 | log_fatal("invalid broadcast address data length"); |
1204 | data_string_forget(&db, MDL); | |
ece9e253 TL |
1205 | } |
1206 | ||
cde11a4c | 1207 | oc = lookup_option(&server_universe, options, SV_LOCAL_ADDRESS); |
ece9e253 | 1208 | if (oc && |
cde11a4c SR |
1209 | evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, |
1210 | &global_scope, oc, MDL)) { | |
ece9e253 | 1211 | if (db.len == 4) { |
cde11a4c | 1212 | memcpy(&local_address, db.data, 4); |
ece9e253 | 1213 | } else |
cde11a4c SR |
1214 | log_fatal("invalid local address data length"); |
1215 | data_string_forget(&db, MDL); | |
ece9e253 TL |
1216 | } |
1217 | ||
cde11a4c | 1218 | oc = lookup_option(&server_universe, options, SV_DDNS_UPDATE_STYLE); |
fafe8463 | 1219 | if (oc) { |
cde11a4c SR |
1220 | if (evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, |
1221 | &global_scope, oc, MDL)) { | |
fafe8463 | 1222 | if (db.len == 1) { |
cde11a4c | 1223 | ddns_update_style = db.data[0]; |
fafe8463 | 1224 | } else |
cde11a4c SR |
1225 | log_fatal("invalid dns update type"); |
1226 | data_string_forget(&db, MDL); | |
fafe8463 | 1227 | } |
d7f6db15 | 1228 | } else { |
884a458f | 1229 | ddns_update_style = DDNS_UPDATE_STYLE_NONE; |
d7f6db15 | 1230 | } |
98bf1607 SR |
1231 | #if defined (NSUPDATE) |
1232 | /* We no longer support ad_hoc, tell the user */ | |
1233 | if (ddns_update_style == DDNS_UPDATE_STYLE_AD_HOC) { | |
1234 | log_fatal("ddns-update-style ad_hoc no longer supported"); | |
1235 | } | |
61ef216b SR |
1236 | |
1237 | oc = lookup_option(&server_universe, options, SV_DDNS_LOCAL_ADDRESS4); | |
1238 | if (oc) { | |
1239 | if (evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, | |
1240 | &global_scope, oc, MDL)) { | |
1241 | if (db.len == 4) { | |
1242 | memcpy(&local4, db.data, 4); | |
1243 | local4_ptr = &local4; | |
1244 | } | |
1245 | data_string_forget(&db, MDL); | |
1246 | } | |
1247 | } | |
1248 | ||
1249 | oc = lookup_option(&server_universe, options, SV_DDNS_LOCAL_ADDRESS6); | |
1250 | if (oc) { | |
1251 | if (evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, | |
1252 | &global_scope, oc, MDL)) { | |
1253 | if (db.len == 16) { | |
1254 | memcpy(&local6, db.data, 16); | |
1255 | local6_ptr = &local6; | |
1256 | } | |
1257 | data_string_forget(&db, MDL); | |
1258 | } | |
1259 | } | |
1260 | ||
ca22af89 TM |
1261 | /* Don't init DNS client if update style is none. This avoids |
1262 | * listening ports that aren't needed. We don't use ddns-udpates | |
1263 | * as that has multiple levels of scope. */ | |
1264 | if (ddns_update_style != DDNS_UPDATE_STYLE_NONE) { | |
1265 | if (dhcp_context_create(DHCP_CONTEXT_POST_DB, | |
1266 | local4_ptr, local6_ptr) | |
1267 | != ISC_R_SUCCESS) { | |
1268 | log_fatal("Unable to complete ddns initialization"); | |
1269 | } | |
1270 | } | |
98bf1607 SR |
1271 | #else |
1272 | /* If we don't have support for updates compiled in tell the user */ | |
1273 | if (ddns_update_style != DDNS_UPDATE_STYLE_NONE) { | |
1274 | log_fatal("Support for ddns-update-style not compiled in"); | |
1275 | } | |
1276 | #endif | |
fafe8463 | 1277 | |
3956569b TM |
1278 | if (!quiet) { |
1279 | log_info ("Config file: %s", path_dhcpd_conf); | |
1280 | log_info ("Database file: %s", path_dhcpd_db); | |
1281 | log_info ("PID file: %s", path_dhcpd_pid); | |
1282 | } | |
1283 | ||
cde11a4c | 1284 | oc = lookup_option(&server_universe, options, SV_LOG_FACILITY); |
ee5a7404 | 1285 | if (oc) { |
cde11a4c SR |
1286 | if (evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, |
1287 | &global_scope, oc, MDL)) { | |
ee5a7404 TL |
1288 | if (db.len == 1) { |
1289 | closelog (); | |
7acd8753 FD |
1290 | openlog(isc_file_basename(progname), |
1291 | DHCP_LOG_OPTIONS, db.data[0]); | |
a920d3da TL |
1292 | /* Log the startup banner into the new |
1293 | log file. */ | |
3956569b TM |
1294 | /* Don't log to stderr twice. */ |
1295 | tmp = log_perror; | |
1296 | log_perror = 0; | |
1297 | log_info("%s %s", message, PACKAGE_VERSION); | |
1298 | log_info(copyright); | |
1299 | log_info(arr); | |
1300 | log_info(url); | |
1301 | log_perror = tmp; | |
ee5a7404 | 1302 | } else |
cde11a4c SR |
1303 | log_fatal("invalid log facility"); |
1304 | data_string_forget(&db, MDL); | |
ee5a7404 TL |
1305 | } |
1306 | } | |
e422b8c7 TM |
1307 | |
1308 | #if defined(DELAYED_ACK) | |
6368a1bd DH |
1309 | oc = lookup_option(&server_universe, options, SV_DELAYED_ACK); |
1310 | if (oc && | |
1311 | evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, | |
1312 | &global_scope, oc, MDL)) { | |
1313 | if (db.len == 2) { | |
1314 | max_outstanding_acks = htons(getUShort(db.data)); | |
1315 | } else { | |
1316 | log_fatal("invalid max delayed ACK count "); | |
1317 | } | |
1318 | data_string_forget(&db, MDL); | |
1319 | } | |
ee5a7404 | 1320 | |
f8cbf390 DH |
1321 | oc = lookup_option(&server_universe, options, SV_MAX_ACK_DELAY); |
1322 | if (oc && | |
1323 | evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, | |
1324 | &global_scope, oc, MDL)) { | |
1325 | u_int32_t timeval; | |
1326 | ||
1327 | if (db.len != 4) | |
1328 | log_fatal("invalid max ack delay configuration"); | |
1329 | ||
1330 | timeval = getULong(db.data); | |
1331 | max_ack_delay_secs = timeval / 1000000; | |
1332 | max_ack_delay_usecs = timeval % 1000000; | |
1333 | ||
1334 | data_string_forget(&db, MDL); | |
1335 | } | |
e422b8c7 | 1336 | #endif |
f8cbf390 | 1337 | |
cde11a4c SR |
1338 | oc = lookup_option(&server_universe, options, SV_DONT_USE_FSYNC); |
1339 | if ((oc != NULL) && | |
1340 | evaluate_boolean_option_cache(NULL, NULL, NULL, NULL, options, NULL, | |
1341 | &global_scope, oc, MDL)) { | |
1342 | dont_use_fsync = 1; | |
1343 | log_error("Not using fsync() to flush lease writes"); | |
1344 | } | |
1345 | ||
7116a34f TM |
1346 | oc = lookup_option(&server_universe, options, SV_SERVER_ID_CHECK); |
1347 | if ((oc != NULL) && | |
1348 | evaluate_boolean_option_cache(NULL, NULL, NULL, NULL, options, NULL, | |
1349 | &global_scope, oc, MDL)) { | |
1350 | log_info("Setting server-id-check true"); | |
1351 | server_id_check = 1; | |
1352 | } | |
1353 | ||
1a006ff6 TM |
1354 | oc = lookup_option(&server_universe, options, SV_PREFIX_LEN_MODE); |
1355 | if ((oc != NULL) && | |
1356 | evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, | |
1357 | &global_scope, oc, MDL)) { | |
1358 | if (db.len == 1) { | |
1359 | prefix_length_mode = db.data[0]; | |
1360 | } else { | |
1361 | log_fatal("invalid prefix-len-mode"); | |
1362 | } | |
1363 | ||
1364 | data_string_forget(&db, MDL); | |
1365 | } | |
1366 | ||
a5252220 TM |
1367 | // Set global abandon-lease-time option. |
1368 | oc = lookup_option (&server_universe, options, SV_ABANDON_LEASE_TIME); | |
1369 | if ((oc != NULL) && | |
1370 | evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, | |
1371 | &global_scope, oc, MDL)) { | |
1372 | if (db.len == sizeof (u_int32_t)) { | |
1373 | abandon_lease_time = getULong (db.data); | |
1374 | } else { | |
1375 | log_fatal("invalid abandon-lease-time"); | |
1376 | } | |
1377 | ||
1378 | data_string_forget (&db, MDL); | |
1379 | } | |
1380 | ||
30593241 TM |
1381 | #if defined (FAILOVER_PROTOCOL) |
1382 | oc = lookup_option(&server_universe, options, SV_CHECK_SECS_BYTE_ORDER); | |
1383 | if ((oc != NULL) && | |
1384 | evaluate_boolean_option_cache(NULL, NULL, NULL, NULL, options, NULL, | |
1385 | &global_scope, oc, MDL)) { | |
1386 | check_secs_byte_order = 1; | |
1387 | } | |
1388 | #endif | |
1389 | ||
3933e2aa SR |
1390 | #if defined (BINARY_LEASES) |
1391 | if (local_family == AF_INET) { | |
1392 | log_info("Source compiled to use binary-leases"); | |
1393 | } | |
1394 | #endif | |
1395 | ||
b62e4418 | 1396 | /* Don't need the options anymore. */ |
cde11a4c | 1397 | option_state_dereference(&options, MDL); |
d7837182 TL |
1398 | } |
1399 | ||
d758ad8c TL |
1400 | void postdb_startup (void) |
1401 | { | |
1402 | /* Initialize the omapi listener state. */ | |
1403 | if (omapi_port != -1) { | |
1404 | omapi_listener_start (0); | |
1405 | } | |
1406 | ||
1407 | #if defined (FAILOVER_PROTOCOL) | |
1408 | /* Initialize the failover listener state. */ | |
1409 | dhcp_failover_startup (); | |
1410 | #endif | |
d9b43370 SK |
1411 | |
1412 | /* | |
1413 | * Begin our lease timeout background task. | |
1414 | */ | |
1415 | schedule_all_ipv6_lease_timeouts(); | |
d758ad8c TL |
1416 | } |
1417 | ||
9acb0bab TL |
1418 | void lease_pinged (from, packet, length) |
1419 | struct iaddr from; | |
1420 | u_int8_t *packet; | |
1421 | int length; | |
1422 | { | |
1423 | struct lease *lp; | |
1424 | ||
1425 | /* Don't try to look up a pinged lease if we aren't trying to | |
1426 | ping one - otherwise somebody could easily make us churn by | |
1427 | just forging repeated ICMP EchoReply packets for us to look | |
1428 | up. */ | |
1429 | if (!outstanding_pings) | |
1430 | return; | |
1431 | ||
20916cae TL |
1432 | lp = (struct lease *)0; |
1433 | if (!find_lease_by_ip_addr (&lp, from, MDL)) { | |
1434 | log_debug ("unexpected ICMP Echo Reply from %s", | |
1435 | piaddr (from)); | |
9acb0bab TL |
1436 | return; |
1437 | } | |
1438 | ||
1439 | if (!lp -> state) { | |
d8e1567c | 1440 | #if defined (FAILOVER_PROTOCOL) |
b73c184a TL |
1441 | if (!lp -> pool || |
1442 | !lp -> pool -> failover_peer) | |
d8e1567c | 1443 | #endif |
b73c184a TL |
1444 | log_debug ("ICMP Echo Reply for %s late or spurious.", |
1445 | piaddr (from)); | |
20916cae | 1446 | goto out; |
9acb0bab TL |
1447 | } |
1448 | ||
c0a8b011 | 1449 | if (lp -> ends > cur_time) { |
b73c184a | 1450 | log_debug ("ICMP Echo reply while lease %s valid.", |
4bd8800e | 1451 | piaddr (from)); |
c0a8b011 TL |
1452 | } |
1453 | ||
9acb0bab TL |
1454 | /* At this point it looks like we pinged a lease and got a |
1455 | response, which shouldn't have happened. */ | |
4bd8800e TL |
1456 | data_string_forget (&lp -> state -> parameter_request_list, MDL); |
1457 | free_lease_state (lp -> state, MDL); | |
9acb0bab TL |
1458 | lp -> state = (struct lease_state *)0; |
1459 | ||
1460 | abandon_lease (lp, "pinged before offer"); | |
1461 | cancel_timeout (lease_ping_timeout, lp); | |
1462 | --outstanding_pings; | |
20916cae TL |
1463 | out: |
1464 | lease_dereference (&lp, MDL); | |
9acb0bab TL |
1465 | } |
1466 | ||
1467 | void lease_ping_timeout (vlp) | |
1468 | void *vlp; | |
1469 | { | |
1470 | struct lease *lp = vlp; | |
1471 | ||
77222488 TL |
1472 | #if defined (DEBUG_MEMORY_LEAKAGE) |
1473 | unsigned long previous_outstanding = dmalloc_outstanding; | |
1474 | #endif | |
1475 | ||
9acb0bab TL |
1476 | --outstanding_pings; |
1477 | dhcp_reply (lp); | |
77222488 TL |
1478 | |
1479 | #if defined (DEBUG_MEMORY_LEAKAGE) | |
1480 | log_info ("generation %ld: %ld new, %ld outstanding, %ld long-term", | |
1481 | dmalloc_generation, | |
1482 | dmalloc_outstanding - previous_outstanding, | |
1483 | dmalloc_outstanding, dmalloc_longterm); | |
1484 | #endif | |
d758ad8c | 1485 | #if defined (DEBUG_MEMORY_LEAKAGE) |
77222488 TL |
1486 | dmalloc_dump_outstanding (); |
1487 | #endif | |
9acb0bab | 1488 | } |
20916cae TL |
1489 | |
1490 | int dhcpd_interface_setup_hook (struct interface_info *ip, struct iaddr *ia) | |
1491 | { | |
1492 | struct subnet *subnet; | |
1493 | struct shared_network *share; | |
1494 | isc_result_t status; | |
1495 | ||
1496 | /* Special case for fallback network - not sure why this is | |
1497 | necessary. */ | |
1498 | if (!ia) { | |
1499 | const char *fnn = "fallback-net"; | |
20916cae TL |
1500 | status = shared_network_allocate (&ip -> shared_network, MDL); |
1501 | if (status != ISC_R_SUCCESS) | |
1502 | log_fatal ("No memory for shared subnet: %s", | |
1503 | isc_result_totext (status)); | |
1504 | ip -> shared_network -> name = dmalloc (strlen (fnn) + 1, MDL); | |
88c3ff5d TM |
1505 | if (!ip -> shared_network -> name) |
1506 | log_fatal("no memory for shared network"); | |
20916cae TL |
1507 | strcpy (ip -> shared_network -> name, fnn); |
1508 | return 1; | |
1509 | } | |
1510 | ||
1511 | /* If there's a registered subnet for this address, | |
1512 | connect it together... */ | |
1513 | subnet = (struct subnet *)0; | |
1514 | if (find_subnet (&subnet, *ia, MDL)) { | |
1515 | /* If this interface has multiple aliases on the same | |
1516 | subnet, ignore all but the first we encounter. */ | |
1517 | if (!subnet -> interface) { | |
d758ad8c | 1518 | interface_reference (&subnet -> interface, ip, MDL); |
20916cae TL |
1519 | subnet -> interface_address = *ia; |
1520 | } else if (subnet -> interface != ip) { | |
1521 | log_error ("Multiple interfaces match the %s: %s %s", | |
1522 | "same subnet", | |
1523 | subnet -> interface -> name, ip -> name); | |
1524 | } | |
1525 | share = subnet -> shared_network; | |
1526 | if (ip -> shared_network && | |
1527 | ip -> shared_network != share) { | |
1528 | log_fatal ("Interface %s matches multiple shared %s", | |
1529 | ip -> name, "networks"); | |
1530 | } else { | |
1531 | if (!ip -> shared_network) | |
1532 | shared_network_reference | |
1533 | (&ip -> shared_network, share, MDL); | |
1534 | } | |
1535 | ||
1536 | if (!share -> interface) { | |
1537 | interface_reference (&share -> interface, ip, MDL); | |
1538 | } else if (share -> interface != ip) { | |
1539 | log_error ("Multiple interfaces match the %s: %s %s", | |
1540 | "same shared network", | |
1541 | share -> interface -> name, ip -> name); | |
1542 | } | |
d758ad8c | 1543 | subnet_dereference (&subnet, MDL); |
20916cae TL |
1544 | } |
1545 | return 1; | |
1546 | } | |
d758ad8c TL |
1547 | |
1548 | static TIME shutdown_time; | |
1549 | static int omapi_connection_count; | |
1550 | enum dhcp_shutdown_state shutdown_state; | |
1551 | ||
1552 | isc_result_t dhcp_io_shutdown (omapi_object_t *obj, void *foo) | |
1553 | { | |
1554 | /* Shut down all listeners. */ | |
1555 | if (shutdown_state == shutdown_listeners && | |
1556 | obj -> type == omapi_type_listener && | |
1557 | obj -> inner && | |
1558 | obj -> inner -> type == omapi_type_protocol_listener) { | |
1559 | omapi_listener_destroy (obj, MDL); | |
1560 | return ISC_R_SUCCESS; | |
1561 | } | |
1562 | ||
1563 | /* Shut down all existing omapi connections. */ | |
1564 | if (obj -> type == omapi_type_connection && | |
1565 | obj -> inner && | |
1566 | obj -> inner -> type == omapi_type_protocol) { | |
1567 | if (shutdown_state == shutdown_drop_omapi_connections) { | |
1568 | omapi_disconnect (obj, 1); | |
1569 | } | |
1570 | omapi_connection_count++; | |
1571 | if (shutdown_state == shutdown_omapi_connections) { | |
1572 | omapi_disconnect (obj, 0); | |
1573 | return ISC_R_SUCCESS; | |
1574 | } | |
1575 | } | |
1576 | ||
1577 | /* Shutdown all DHCP interfaces. */ | |
1578 | if (obj -> type == dhcp_type_interface && | |
1579 | shutdown_state == shutdown_dhcp) { | |
1580 | dhcp_interface_remove (obj, (omapi_object_t *)0); | |
1581 | return ISC_R_SUCCESS; | |
1582 | } | |
1583 | return ISC_R_SUCCESS; | |
1584 | } | |
1585 | ||
1586 | static isc_result_t dhcp_io_shutdown_countdown (void *vlp) | |
1587 | { | |
d758ad8c | 1588 | #if defined (FAILOVER_PROTOCOL) |
66cebfcb | 1589 | dhcp_failover_state_t *state; |
d758ad8c TL |
1590 | int failover_connection_count = 0; |
1591 | #endif | |
be62cf06 | 1592 | struct timeval tv; |
d758ad8c TL |
1593 | |
1594 | oncemore: | |
1595 | if (shutdown_state == shutdown_listeners || | |
1596 | shutdown_state == shutdown_omapi_connections || | |
1597 | shutdown_state == shutdown_drop_omapi_connections || | |
1598 | shutdown_state == shutdown_dhcp) { | |
1599 | omapi_connection_count = 0; | |
1600 | omapi_io_state_foreach (dhcp_io_shutdown, 0); | |
1601 | } | |
1602 | ||
1603 | if ((shutdown_state == shutdown_listeners || | |
1604 | shutdown_state == shutdown_omapi_connections || | |
1605 | shutdown_state == shutdown_drop_omapi_connections) && | |
1606 | omapi_connection_count == 0) { | |
1607 | shutdown_state = shutdown_dhcp; | |
1608 | shutdown_time = cur_time; | |
1609 | goto oncemore; | |
1610 | } else if (shutdown_state == shutdown_listeners && | |
1611 | cur_time - shutdown_time > 4) { | |
1612 | shutdown_state = shutdown_omapi_connections; | |
1613 | shutdown_time = cur_time; | |
1614 | } else if (shutdown_state == shutdown_omapi_connections && | |
1615 | cur_time - shutdown_time > 4) { | |
1616 | shutdown_state = shutdown_drop_omapi_connections; | |
1617 | shutdown_time = cur_time; | |
1618 | } else if (shutdown_state == shutdown_drop_omapi_connections && | |
1619 | cur_time - shutdown_time > 4) { | |
1620 | shutdown_state = shutdown_dhcp; | |
1621 | shutdown_time = cur_time; | |
1622 | goto oncemore; | |
1623 | } else if (shutdown_state == shutdown_dhcp && | |
1624 | cur_time - shutdown_time > 4) { | |
1625 | shutdown_state = shutdown_done; | |
1626 | shutdown_time = cur_time; | |
1627 | } | |
1628 | ||
1629 | #if defined (FAILOVER_PROTOCOL) | |
1630 | /* Set all failover peers into the shutdown state. */ | |
1631 | if (shutdown_state == shutdown_dhcp) { | |
1632 | for (state = failover_states; state; state = state -> next) { | |
1633 | if (state -> me.state == normal) { | |
1634 | dhcp_failover_set_state (state, shut_down); | |
1635 | failover_connection_count++; | |
1636 | } | |
1637 | if (state -> me.state == shut_down && | |
1638 | state -> partner.state != partner_down) | |
1639 | failover_connection_count++; | |
1640 | } | |
1641 | } | |
1642 | ||
1643 | if (shutdown_state == shutdown_done) { | |
1644 | for (state = failover_states; state; state = state -> next) { | |
1645 | if (state -> me.state == shut_down) { | |
1646 | if (state -> link_to_peer) | |
1647 | dhcp_failover_link_dereference (&state -> link_to_peer, | |
1648 | MDL); | |
1649 | dhcp_failover_set_state (state, recover); | |
1650 | } | |
1651 | } | |
98311e4b | 1652 | #if defined (DEBUG_MEMORY_LEAKAGE) && \ |
d758ad8c TL |
1653 | defined (DEBUG_MEMORY_LEAKAGE_ON_EXIT) |
1654 | free_everything (); | |
1655 | omapi_print_dmalloc_usage_by_caller (); | |
1656 | #endif | |
f950de77 SR |
1657 | if (no_pid_file == ISC_FALSE) |
1658 | (void) unlink(path_dhcpd_pid); | |
d758ad8c TL |
1659 | exit (0); |
1660 | } | |
1661 | #else | |
1662 | if (shutdown_state == shutdown_done) { | |
98311e4b DH |
1663 | #if defined (DEBUG_MEMORY_LEAKAGE) && \ |
1664 | defined (DEBUG_MEMORY_LEAKAGE_ON_EXIT) | |
1665 | free_everything (); | |
1666 | omapi_print_dmalloc_usage_by_caller (); | |
d758ad8c | 1667 | #endif |
f950de77 SR |
1668 | if (no_pid_file == ISC_FALSE) |
1669 | (void) unlink(path_dhcpd_pid); | |
d758ad8c TL |
1670 | exit (0); |
1671 | } | |
1672 | #endif | |
1673 | if (shutdown_state == shutdown_dhcp && | |
33e1cb2b DH |
1674 | #if defined(FAILOVER_PROTOCOL) |
1675 | !failover_connection_count && | |
1676 | #endif | |
1677 | ISC_TRUE) { | |
d758ad8c TL |
1678 | shutdown_state = shutdown_done; |
1679 | shutdown_time = cur_time; | |
1680 | goto oncemore; | |
1681 | } | |
be62cf06 FD |
1682 | tv.tv_sec = cur_tv.tv_sec + 1; |
1683 | tv.tv_usec = cur_tv.tv_usec; | |
1684 | add_timeout (&tv, | |
d758ad8c TL |
1685 | (void (*)(void *))dhcp_io_shutdown_countdown, 0, 0, 0); |
1686 | return ISC_R_SUCCESS; | |
1687 | } | |
1688 | ||
1689 | isc_result_t dhcp_set_control_state (control_object_state_t oldstate, | |
1690 | control_object_state_t newstate) | |
1691 | { | |
0895c955 SR |
1692 | struct timeval tv; |
1693 | ||
1694 | if (newstate != server_shutdown) | |
1695 | return DHCP_R_INVALIDARG; | |
1696 | /* Re-entry. */ | |
1697 | if (shutdown_signal == SIGUSR1) | |
1698 | return ISC_R_SUCCESS; | |
1699 | shutdown_time = cur_time; | |
1700 | shutdown_state = shutdown_listeners; | |
1701 | /* Called by user. */ | |
1702 | if (shutdown_signal == 0) { | |
1703 | shutdown_signal = SIGUSR1; | |
d758ad8c TL |
1704 | dhcp_io_shutdown_countdown (0); |
1705 | return ISC_R_SUCCESS; | |
1706 | } | |
0895c955 SR |
1707 | /* Called on signal. */ |
1708 | log_info("Received signal %d, initiating shutdown.", shutdown_signal); | |
1709 | shutdown_signal = SIGUSR1; | |
1710 | ||
1711 | /* | |
1712 | * Prompt the shutdown event onto the timer queue | |
1713 | * and return to the dispatch loop. | |
1714 | */ | |
1715 | tv.tv_sec = cur_tv.tv_sec; | |
1716 | tv.tv_usec = cur_tv.tv_usec + 1; | |
1717 | add_timeout(&tv, | |
1718 | (void (*)(void *))dhcp_io_shutdown_countdown, 0, 0, 0); | |
1719 | return ISC_R_SUCCESS; | |
d758ad8c | 1720 | } |