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Commit | Line | Data |
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d7837182 TL |
1 | /* dhcpd.c |
2 | ||
3 | DHCP Server Daemon. */ | |
4 | ||
5 | /* | |
109fa1d0 | 6 | * Copyright (c) 2004-2020 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 | 21 | * Internet Systems Consortium, Inc. |
429a56d7 TM |
22 | * PO Box 360 |
23 | * Newmarket, NH 03857 USA | |
98311e4b | 24 | * <info@isc.org> |
2c85ac9b | 25 | * https://www.isc.org/ |
49733f31 | 26 | * |
d7837182 TL |
27 | */ |
28 | ||
ae566556 | 29 | static const char copyright[] = |
109fa1d0 | 30 | "Copyright 2004-2020 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 */ | |
905c58b9 | 51 | # define group real_group |
63971a83 DH |
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 | ||
905c58b9 TM |
76 | /* Stores configured DDNS conflict detection flags */ |
77 | u_int16_t ddns_conflict_mask; | |
144cdb49 | 78 | #endif /* NSUPDATE */ |
905c58b9 | 79 | |
98bf1607 | 80 | int ddns_update_style; |
cde11a4c | 81 | int dont_use_fsync = 0; /* 0 = default, use fsync, 1 = don't use fsync */ |
7116a34f | 82 | int server_id_check = 0; /* 0 = default, don't check server id, 1 = do check */ |
bafa7b74 TM |
83 | |
84 | #ifdef DHCPv6 | |
b53ba157 | 85 | int prefix_length_mode = PLM_PREFER; |
bafa7b74 TM |
86 | int do_release_on_roam = 0; /* 0 = default, do not release v6 leases on roam */ |
87 | #endif | |
77222488 | 88 | |
c2e5ee28 TM |
89 | #ifdef EUI_64 |
90 | int persist_eui64 = 1; /* 1 = write EUI64 leases to disk, 0 = don't */ | |
91 | #endif | |
92 | ||
347d4962 | 93 | int authoring_byte_order = 0; /* 0 = not set */ |
cc1bd34e | 94 | int lease_id_format = TOKEN_OCTAL; /* octal by default */ |
a5252220 | 95 | u_int32_t abandon_lease_time = DEFAULT_ABANDON_LEASE_TIME; |
347d4962 | 96 | |
b1b7b521 TL |
97 | const char *path_dhcpd_conf = _PATH_DHCPD_CONF; |
98 | const char *path_dhcpd_db = _PATH_DHCPD_DB; | |
99 | const char *path_dhcpd_pid = _PATH_DHCPD_PID; | |
4a5bfeac SR |
100 | /* False (default) => we write and use a pid file */ |
101 | isc_boolean_t no_pid_file = ISC_FALSE; | |
d7837182 | 102 | |
0a347607 TL |
103 | int dhcp_max_agent_option_packet_length = DHCP_MTU_MAX; |
104 | ||
49146f3c | 105 | static omapi_auth_key_t *omapi_key = (omapi_auth_key_t *)0; |
a920d3da TL |
106 | int omapi_port; |
107 | ||
108 | #if defined (TRACING) | |
109 | trace_type_t *trace_srandom; | |
110 | #endif | |
49146f3c | 111 | |
7acd8753 FD |
112 | char *progname; |
113 | ||
49146f3c DN |
114 | static isc_result_t verify_addr (omapi_object_t *l, omapi_addr_t *addr) { |
115 | return ISC_R_SUCCESS; | |
116 | } | |
117 | ||
118 | static isc_result_t verify_auth (omapi_object_t *p, omapi_auth_key_t *a) { | |
119 | if (a != omapi_key) | |
98bf1607 | 120 | return DHCP_R_INVALIDKEY; |
49146f3c DN |
121 | return ISC_R_SUCCESS; |
122 | } | |
123 | ||
d758ad8c TL |
124 | static void omapi_listener_start (void *foo) |
125 | { | |
126 | omapi_object_t *listener; | |
127 | isc_result_t result; | |
be62cf06 | 128 | struct timeval tv; |
d758ad8c TL |
129 | |
130 | listener = (omapi_object_t *)0; | |
131 | result = omapi_generic_new (&listener, MDL); | |
132 | if (result != ISC_R_SUCCESS) | |
133 | log_fatal ("Can't allocate new generic object: %s", | |
134 | isc_result_totext (result)); | |
135 | result = omapi_protocol_listen (listener, | |
136 | (unsigned)omapi_port, 1); | |
137 | if (result == ISC_R_SUCCESS && omapi_key) | |
138 | result = omapi_protocol_configure_security | |
139 | (listener, verify_addr, verify_auth); | |
140 | if (result != ISC_R_SUCCESS) { | |
141 | log_error ("Can't start OMAPI protocol: %s", | |
142 | isc_result_totext (result)); | |
5d082abd TM |
143 | tv.tv_sec = cur_tv.tv_sec + 5; |
144 | tv.tv_usec = cur_tv.tv_usec; | |
be62cf06 | 145 | add_timeout (&tv, omapi_listener_start, 0, 0, 0); |
d758ad8c TL |
146 | } |
147 | omapi_object_dereference (&listener, MDL); | |
148 | } | |
149 | ||
7a6c9368 SR |
150 | #ifndef UNIT_TEST |
151 | ||
68dfa910 FD |
152 | #define DHCPD_USAGE0 \ |
153 | "[-p <UDP port #>] [-f] [-d] [-q] [-t|-T]\n" | |
154 | ||
155 | #ifdef DHCPv6 | |
156 | #ifdef DHCP4o6 | |
157 | #define DHCPD_USAGE1 \ | |
158 | " [-4|-6] [-4o6 <port>]\n" \ | |
159 | " [-cf config-file] [-lf lease-file]\n" | |
160 | #else /* DHCP4o6 */ | |
161 | #define DHCPD_USAGE1 \ | |
162 | " [-4|-6] [-cf config-file] [-lf lease-file]\n" | |
163 | #endif /* DHCP4o6 */ | |
164 | #else /* !DHCPv6 */ | |
165 | #define DHCPD_USAGE1 \ | |
166 | " [-cf config-file] [-lf lease-file]\n" | |
167 | #endif /* DHCPv6 */ | |
168 | ||
169 | #if defined (PARANOIA) | |
170 | #define DHCPD_USAGEP \ | |
171 | " [-user user] [-group group] [-chroot dir]\n" | |
172 | #else | |
173 | #define DHCPD_USAGEP "" | |
174 | #endif /* PARANOIA */ | |
175 | ||
176 | #if defined (TRACING) | |
177 | #define DHCPD_USAGET \ | |
178 | " [-tf trace-output-file]\n" \ | |
179 | " [-play trace-input-file]\n" | |
180 | #else | |
181 | #define DHCPD_USAGET "" | |
182 | #endif /* TRACING */ | |
183 | ||
184 | #define DHCPD_USAGEC \ | |
185 | " [-pf pid-file] [--no-pid] [-s server]\n" \ | |
186 | " [if0 [...ifN]]" | |
187 | ||
188 | #define DHCPD_USAGEH "{--version|--help|-h}" | |
189 | ||
b2cb745b SR |
190 | /*! |
191 | * | |
192 | * \brief Print the generic usage message | |
193 | * | |
194 | * If the user has provided an incorrect command line print out | |
195 | * the description of the command line. The arguments provide | |
196 | * a way for the caller to request more specific information about | |
197 | * the error be printed as well. Mostly this will be that some | |
0c03eaef | 198 | * command doesn't include its argument. |
b2cb745b SR |
199 | * |
200 | * \param sfmt - The basic string and format for the specific error | |
0c03eaef | 201 | * \param sarg - Generally the offending argument from the command line. |
b2cb745b SR |
202 | * |
203 | * \return Nothing | |
204 | */ | |
205 | static char use_noarg[] = "No argument for command: %s "; | |
206 | ||
207 | static void | |
208 | usage(const char *sfmt, const char *sarg) { | |
209 | log_info("%s %s", message, PACKAGE_VERSION); | |
210 | log_info(copyright); | |
211 | log_info(arr); | |
fc4f62fe | 212 | log_info(url); |
b2cb745b SR |
213 | |
214 | /* If desired print out the specific error message */ | |
215 | #ifdef PRINT_SPECIFIC_CL_ERRORS | |
216 | if (sfmt != NULL) | |
217 | log_error(sfmt, sarg); | |
218 | #endif | |
219 | ||
68dfa910 FD |
220 | log_fatal("Usage: %s %s%s%s%s%s\n %s %s", |
221 | isc_file_basename(progname), | |
222 | DHCPD_USAGE0, | |
223 | DHCPD_USAGE1, | |
224 | DHCPD_USAGEP, | |
225 | DHCPD_USAGET, | |
226 | DHCPD_USAGEC, | |
227 | isc_file_basename(progname), | |
228 | DHCPD_USAGEH); | |
b2cb745b SR |
229 | } |
230 | ||
7a6c9368 SR |
231 | /* Note: If we add unit tests to test setup_chroot it will |
232 | * need to be moved to be outside the ifndef UNIT_TEST block. | |
233 | */ | |
234 | ||
63971a83 DH |
235 | #if defined (PARANOIA) |
236 | /* to be used in one of two possible scenarios */ | |
237 | static void setup_chroot (char *chroot_dir) { | |
238 | if (geteuid()) | |
239 | log_fatal ("you must be root to use chroot"); | |
240 | ||
241 | if (chroot(chroot_dir)) { | |
242 | log_fatal ("chroot(\"%s\"): %m", chroot_dir); | |
243 | } | |
244 | if (chdir ("/")) { | |
245 | /* probably permission denied */ | |
246 | log_fatal ("chdir(\"/\"): %m"); | |
247 | } | |
248 | } | |
249 | #endif /* PARANOIA */ | |
250 | ||
905c58b9 | 251 | int |
98bd7ca0 | 252 | main(int argc, char **argv) { |
185d16f9 | 253 | int fd; |
c6dff01f | 254 | int i, status; |
d7837182 | 255 | struct servent *ent; |
28868515 | 256 | char *s; |
1ac5bc1a | 257 | int cftest = 0; |
8f450cac | 258 | int lftest = 0; |
d7837182 | 259 | int pid; |
c6dff01f | 260 | char pbuf [20]; |
001b9d53 | 261 | #ifndef DEBUG |
c6dff01f | 262 | int daemon = 1; |
29b23207 | 263 | int dfd[2] = { -1, -1 }; |
955d158b | 264 | #endif |
632d8396 | 265 | int quiet = 0; |
e3a84e35 | 266 | char *server = (char *)0; |
972bde18 | 267 | isc_result_t result; |
b1b7b521 | 268 | unsigned seed; |
972bde18 | 269 | struct interface_info *ip; |
98bf1607 | 270 | #if defined (NSUPDATE) |
77222488 TL |
271 | struct parse *parse; |
272 | int lose; | |
98bf1607 | 273 | #endif |
ab77c8b8 TM |
274 | int have_dhcpd_conf = 0; |
275 | int have_dhcpd_db = 0; | |
276 | int have_dhcpd_pid = 0; | |
c998be87 | 277 | #ifdef DHCPv6 |
98bd7ca0 | 278 | int local_family_set = 0; |
785c1a51 FD |
279 | #ifdef DHCP4o6 |
280 | u_int16_t dhcp4o6_port = 0; | |
281 | #endif /* DHCP4o6 */ | |
c998be87 | 282 | #endif /* DHCPv6 */ |
662df45a | 283 | #if defined (TRACING) |
a920d3da TL |
284 | char *traceinfile = (char *)0; |
285 | char *traceoutfile = (char *)0; | |
662df45a | 286 | #endif |
d7837182 | 287 | |
63971a83 DH |
288 | #if defined (PARANOIA) |
289 | char *set_user = 0; | |
290 | char *set_group = 0; | |
291 | char *set_chroot = 0; | |
63971a83 DH |
292 | #endif /* PARANOIA */ |
293 | ||
7acd8753 FD |
294 | #ifdef OLD_LOG_NAME |
295 | progname = "dhcpd"; | |
296 | #else | |
297 | progname = argv[0]; | |
298 | #endif | |
299 | ||
185d16f9 SK |
300 | /* Make sure that file descriptors 0 (stdin), 1, (stdout), and |
301 | 2 (stderr) are open. To do this, we assume that when we | |
20ae1aff | 302 | open a file the lowest available file descriptor is used. */ |
509df655 | 303 | fd = open("/dev/null", O_RDWR); |
185d16f9 | 304 | if (fd == 0) |
509df655 | 305 | fd = open("/dev/null", O_RDWR); |
185d16f9 | 306 | if (fd == 1) |
509df655 | 307 | fd = open("/dev/null", O_RDWR); |
185d16f9 SK |
308 | if (fd == 2) |
309 | log_perror = 0; /* No sense logging to /dev/null. */ | |
310 | else if (fd != -1) | |
509df655 | 311 | close(fd); |
fb5f8793 | 312 | |
29b23207 FD |
313 | /* Parse arguments changing daemon */ |
314 | for (i = 1; i < argc; i++) { | |
315 | if (!strcmp (argv [i], "-f")) { | |
316 | #ifndef DEBUG | |
317 | daemon = 0; | |
318 | #endif | |
319 | } else if (!strcmp (argv [i], "-d")) { | |
320 | #ifndef DEBUG | |
321 | daemon = 0; | |
322 | #endif | |
323 | } else if (!strcmp (argv [i], "-t")) { | |
324 | #ifndef DEBUG | |
325 | daemon = 0; | |
326 | #endif | |
327 | } else if (!strcmp (argv [i], "-T")) { | |
328 | #ifndef DEBUG | |
329 | daemon = 0; | |
330 | #endif | |
331 | } else if (!strcmp (argv [i], "--version")) { | |
332 | const char vstring[] = "isc-dhcpd-"; | |
333 | IGNORE_RET(write(STDERR_FILENO, vstring, | |
334 | strlen(vstring))); | |
335 | IGNORE_RET(write(STDERR_FILENO, | |
336 | PACKAGE_VERSION, | |
337 | strlen(PACKAGE_VERSION))); | |
338 | IGNORE_RET(write(STDERR_FILENO, "\n", 1)); | |
339 | exit (0); | |
68dfa910 FD |
340 | } else if (!strcmp(argv[i], "--help") || |
341 | !strcmp(argv[i], "-h")) { | |
342 | const char *pname = isc_file_basename(progname); | |
343 | IGNORE_RET(write(STDERR_FILENO, "Usage: ", 7)); | |
344 | IGNORE_RET(write(STDERR_FILENO, pname, strlen(pname))); | |
345 | IGNORE_RET(write(STDERR_FILENO, " ", 1)); | |
346 | IGNORE_RET(write(STDERR_FILENO, DHCPD_USAGE0, | |
347 | strlen(DHCPD_USAGE0))); | |
348 | IGNORE_RET(write(STDERR_FILENO, DHCPD_USAGE1, | |
349 | strlen(DHCPD_USAGE1))); | |
350 | #if defined (PARANOIA) | |
351 | IGNORE_RET(write(STDERR_FILENO, DHCPD_USAGEP, | |
352 | strlen(DHCPD_USAGEP))); | |
353 | #endif | |
354 | #if defined (TRACING) | |
355 | IGNORE_RET(write(STDERR_FILENO, DHCPD_USAGET, | |
356 | strlen(DHCPD_USAGET))); | |
357 | #endif | |
358 | IGNORE_RET(write(STDERR_FILENO, DHCPD_USAGEC, | |
359 | strlen(DHCPD_USAGEC))); | |
360 | IGNORE_RET(write(STDERR_FILENO, "\n", 1)); | |
361 | IGNORE_RET(write(STDERR_FILENO, " ", 7)); | |
362 | IGNORE_RET(write(STDERR_FILENO, pname, strlen(pname))); | |
363 | IGNORE_RET(write(STDERR_FILENO, " ", 1)); | |
364 | IGNORE_RET(write(STDERR_FILENO, DHCPD_USAGEH, | |
365 | strlen(DHCPD_USAGEH))); | |
366 | IGNORE_RET(write(STDERR_FILENO, "\n", 1)); | |
367 | exit(0); | |
29b23207 FD |
368 | #ifdef TRACING |
369 | } else if (!strcmp (argv [i], "-play")) { | |
370 | #ifndef DEBUG | |
371 | daemon = 0; | |
372 | #endif | |
373 | #endif | |
374 | } | |
375 | } | |
376 | ||
377 | #ifndef DEBUG | |
378 | /* When not forbidden prepare to become a daemon */ | |
379 | if (daemon) { | |
380 | if (pipe(dfd) == -1) | |
381 | log_fatal("Can't get pipe: %m"); | |
382 | if ((pid = fork ()) < 0) | |
383 | log_fatal("Can't fork daemon: %m"); | |
384 | if (pid != 0) { | |
385 | /* Parent: wait for the child to start */ | |
386 | int n; | |
387 | ||
388 | (void) close(dfd[1]); | |
389 | do { | |
390 | char buf; | |
391 | ||
392 | n = read(dfd[0], &buf, 1); | |
393 | if (n == 1) | |
394 | _exit((int)buf); | |
395 | } while (n == -1 && errno == EINTR); | |
396 | _exit(1); | |
397 | } | |
398 | /* Child */ | |
399 | (void) close(dfd[0]); | |
400 | } | |
401 | #endif | |
402 | ||
98bf1607 | 403 | /* Set up the isc and dns library managers */ |
61ef216b SR |
404 | status = dhcp_context_create(DHCP_CONTEXT_PRE_DB, |
405 | NULL, NULL); | |
98bf1607 SR |
406 | if (status != ISC_R_SUCCESS) |
407 | log_fatal("Can't initialize context: %s", | |
408 | isc_result_totext(status)); | |
409 | ||
f3a05d72 TL |
410 | /* Set up the client classification system. */ |
411 | classification_setup (); | |
412 | ||
413 | /* Initialize the omapi system. */ | |
414 | result = omapi_init (); | |
415 | if (result != ISC_R_SUCCESS) | |
416 | log_fatal ("Can't initialize OMAPI: %s", | |
417 | isc_result_totext (result)); | |
418 | ||
fafe8463 TL |
419 | /* Set up the OMAPI wrappers for common objects. */ |
420 | dhcp_db_objects_setup (); | |
f3a05d72 TL |
421 | /* Set up the OMAPI wrappers for various server database internal |
422 | objects. */ | |
f3a05d72 TL |
423 | dhcp_common_objects_setup (); |
424 | ||
c6dff01f | 425 | /* Initially, log errors to stderr as well as to syslogd. */ |
7acd8753 FD |
426 | openlog (isc_file_basename(progname), |
427 | DHCP_LOG_OPTIONS, DHCPD_LOG_FACILITY); | |
40950384 | 428 | |
d7837182 TL |
429 | for (i = 1; i < argc; i++) { |
430 | if (!strcmp (argv [i], "-p")) { | |
431 | if (++i == argc) | |
b2cb745b | 432 | usage(use_noarg, argv[i-1]); |
59112e84 | 433 | local_port = validate_port (argv [i]); |
8ae2d595 | 434 | log_debug ("binding to user-specified port %d", |
a60076f9 | 435 | ntohs (local_port)); |
c6dff01f TL |
436 | } else if (!strcmp (argv [i], "-f")) { |
437 | #ifndef DEBUG | |
29b23207 | 438 | /* daemon = 0; */ |
c6dff01f TL |
439 | #endif |
440 | } else if (!strcmp (argv [i], "-d")) { | |
77549355 | 441 | #ifndef DEBUG |
29b23207 | 442 | /* daemon = 0; */ |
77549355 | 443 | #endif |
f5d07a38 | 444 | log_perror = -1; |
e3a84e35 TL |
445 | } else if (!strcmp (argv [i], "-s")) { |
446 | if (++i == argc) | |
b2cb745b | 447 | usage(use_noarg, argv[i-1]); |
e3a84e35 | 448 | server = argv [i]; |
63971a83 DH |
449 | #if defined (PARANOIA) |
450 | } else if (!strcmp (argv [i], "-user")) { | |
451 | if (++i == argc) | |
b2cb745b | 452 | usage(use_noarg, argv[i-1]); |
63971a83 DH |
453 | set_user = argv [i]; |
454 | } else if (!strcmp (argv [i], "-group")) { | |
455 | if (++i == argc) | |
b2cb745b | 456 | usage(use_noarg, argv[i-1]); |
63971a83 DH |
457 | set_group = argv [i]; |
458 | } else if (!strcmp (argv [i], "-chroot")) { | |
459 | if (++i == argc) | |
b2cb745b | 460 | usage(use_noarg, argv[i-1]); |
63971a83 DH |
461 | set_chroot = argv [i]; |
462 | #endif /* PARANOIA */ | |
840bd203 TL |
463 | } else if (!strcmp (argv [i], "-cf")) { |
464 | if (++i == argc) | |
b2cb745b | 465 | usage(use_noarg, argv[i-1]); |
840bd203 | 466 | path_dhcpd_conf = argv [i]; |
ab77c8b8 | 467 | have_dhcpd_conf = 1; |
840bd203 TL |
468 | } else if (!strcmp (argv [i], "-lf")) { |
469 | if (++i == argc) | |
b2cb745b | 470 | usage(use_noarg, argv[i-1]); |
840bd203 | 471 | path_dhcpd_db = argv [i]; |
ab77c8b8 | 472 | have_dhcpd_db = 1; |
23b21725 TL |
473 | } else if (!strcmp (argv [i], "-pf")) { |
474 | if (++i == argc) | |
b2cb745b | 475 | usage(use_noarg, argv[i-1]); |
23b21725 | 476 | path_dhcpd_pid = argv [i]; |
ab77c8b8 | 477 | have_dhcpd_pid = 1; |
4a5bfeac SR |
478 | } else if (!strcmp(argv[i], "--no-pid")) { |
479 | no_pid_file = ISC_TRUE; | |
40f63fcd TL |
480 | } else if (!strcmp (argv [i], "-t")) { |
481 | /* test configurations only */ | |
482 | #ifndef DEBUG | |
29b23207 | 483 | /* daemon = 0; */ |
40f63fcd TL |
484 | #endif |
485 | cftest = 1; | |
486 | log_perror = -1; | |
8f450cac TL |
487 | } else if (!strcmp (argv [i], "-T")) { |
488 | /* test configurations and lease file only */ | |
489 | #ifndef DEBUG | |
29b23207 | 490 | /* daemon = 0; */ |
8f450cac TL |
491 | #endif |
492 | cftest = 1; | |
493 | lftest = 1; | |
494 | log_perror = -1; | |
deb0cb72 | 495 | } else if (!strcmp (argv [i], "-q")) { |
632d8396 TL |
496 | quiet = 1; |
497 | quiet_interface_discovery = 1; | |
75135a3f | 498 | #ifdef DHCPv6 |
98bd7ca0 DH |
499 | } else if (!strcmp(argv[i], "-4")) { |
500 | if (local_family_set && (local_family != AF_INET)) { | |
501 | log_fatal("Server cannot run in both IPv4 and " | |
502 | "IPv6 mode at the same time."); | |
503 | } | |
504 | local_family = AF_INET; | |
505 | local_family_set = 1; | |
506 | } else if (!strcmp(argv[i], "-6")) { | |
507 | if (local_family_set && (local_family != AF_INET6)) { | |
508 | log_fatal("Server cannot run in both IPv4 and " | |
509 | "IPv6 mode at the same time."); | |
510 | } | |
511 | local_family = AF_INET6; | |
512 | local_family_set = 1; | |
785c1a51 FD |
513 | #ifdef DHCP4o6 |
514 | } else if (!strcmp(argv[i], "-4o6")) { | |
515 | if (++i == argc) | |
516 | usage(use_noarg, argv[i-1]); | |
517 | dhcp4o6_port = validate_port_pair(argv[i]); | |
518 | ||
519 | log_debug("DHCPv4 over DHCPv6 over ::1 port %d and %d", | |
520 | ntohs(dhcp4o6_port), | |
521 | ntohs(dhcp4o6_port) + 1); | |
522 | dhcpv4_over_dhcpv6 = 1; | |
523 | #endif /* DHCP4o6 */ | |
75135a3f | 524 | #endif /* DHCPv6 */ |
662df45a | 525 | #if defined (TRACING) |
a920d3da TL |
526 | } else if (!strcmp (argv [i], "-tf")) { |
527 | if (++i == argc) | |
b2cb745b | 528 | usage(use_noarg, argv[i-1]); |
a920d3da TL |
529 | traceoutfile = argv [i]; |
530 | } else if (!strcmp (argv [i], "-play")) { | |
531 | if (++i == argc) | |
b2cb745b | 532 | usage(use_noarg, argv[i-1]); |
a920d3da TL |
533 | traceinfile = argv [i]; |
534 | trace_replay_init (); | |
662df45a | 535 | #endif /* TRACING */ |
d992e204 | 536 | } else if (argv [i][0] == '-') { |
b2cb745b | 537 | usage("Unknown command %s", argv[i]); |
d992e204 TL |
538 | } else { |
539 | struct interface_info *tmp = | |
f3a05d72 | 540 | (struct interface_info *)0; |
66be0ad1 SR |
541 | if (strlen(argv[i]) >= sizeof(tmp->name)) |
542 | log_fatal("%s: interface name too long " | |
543 | "(is %ld)", | |
544 | argv[i], (long)strlen(argv[i])); | |
f3a05d72 TL |
545 | result = interface_allocate (&tmp, MDL); |
546 | if (result != ISC_R_SUCCESS) | |
547 | log_fatal ("Insufficient memory to %s %s: %s", | |
548 | "record interface", argv [i], | |
549 | isc_result_totext (result)); | |
d992e204 | 550 | strcpy (tmp -> name, argv [i]); |
f3a05d72 TL |
551 | if (interfaces) { |
552 | interface_reference (&tmp -> next, | |
553 | interfaces, MDL); | |
554 | interface_dereference (&interfaces, MDL); | |
555 | } | |
556 | interface_reference (&interfaces, tmp, MDL); | |
d992e204 | 557 | tmp -> flags = INTERFACE_REQUESTED; |
d992e204 | 558 | } |
d7837182 TL |
559 | } |
560 | ||
785c1a51 FD |
561 | #if defined(DHCPv6) && defined(DHCP4o6) |
562 | if (dhcpv4_over_dhcpv6) { | |
563 | if (!local_family_set) | |
564 | log_error("please specify the address family " | |
565 | "with DHPv4 over DHCPv6 [-4|-6]."); | |
566 | if ((local_family == AF_INET) && (interfaces != NULL)) | |
567 | log_fatal("DHCPv4 server in DHPv4 over DHCPv6 " | |
568 | "mode with command line specified " | |
569 | "interfaces."); | |
570 | } | |
571 | #endif /* DHCPv6 && DHCP4o6 */ | |
572 | ||
ab77c8b8 | 573 | if (!have_dhcpd_conf && (s = getenv ("PATH_DHCPD_CONF"))) { |
cfa7212d TL |
574 | path_dhcpd_conf = s; |
575 | } | |
75135a3f EH |
576 | |
577 | #ifdef DHCPv6 | |
578 | if (local_family == AF_INET6) { | |
579 | /* DHCPv6: override DHCPv4 lease and pid filenames */ | |
ab77c8b8 | 580 | if (!have_dhcpd_db) { |
75135a3f EH |
581 | if ((s = getenv ("PATH_DHCPD6_DB"))) |
582 | path_dhcpd_db = s; | |
583 | else | |
584 | path_dhcpd_db = _PATH_DHCPD6_DB; | |
585 | } | |
ab77c8b8 | 586 | if (!have_dhcpd_pid) { |
75135a3f EH |
587 | if ((s = getenv ("PATH_DHCPD6_PID"))) |
588 | path_dhcpd_pid = s; | |
589 | else | |
590 | path_dhcpd_pid = _PATH_DHCPD6_PID; | |
591 | } | |
592 | } else | |
ab77c8b8 | 593 | #endif /* DHCPv6 */ |
75135a3f | 594 | { |
ab77c8b8 | 595 | if (!have_dhcpd_db && (s = getenv ("PATH_DHCPD_DB"))) { |
75135a3f | 596 | path_dhcpd_db = s; |
ab77c8b8 | 597 | have_dhcpd_db = 1; |
75135a3f | 598 | } |
ab77c8b8 | 599 | if (!have_dhcpd_pid && (s = getenv ("PATH_DHCPD_PID"))) { |
75135a3f | 600 | path_dhcpd_pid = s; |
ab77c8b8 | 601 | have_dhcpd_pid = 1; |
75135a3f EH |
602 | } |
603 | } | |
cfa7212d | 604 | |
a546f2a7 EH |
605 | /* |
606 | * convert relative path names to absolute, for files that need | |
607 | * to be reopened after chdir() has been called | |
608 | */ | |
ab77c8b8 | 609 | if (have_dhcpd_db && path_dhcpd_db[0] != '/') { |
db4e4aa2 | 610 | path_dhcpd_db = absolute_path(path_dhcpd_db); |
a546f2a7 EH |
611 | } |
612 | ||
632d8396 | 613 | if (!quiet) { |
fe5b0fdd | 614 | log_info("%s %s", message, PACKAGE_VERSION); |
8ae2d595 TL |
615 | log_info (copyright); |
616 | log_info (arr); | |
8ae2d595 | 617 | log_info (url); |
77222488 | 618 | } else { |
77222488 TL |
619 | log_perror = 0; |
620 | } | |
c6dff01f | 621 | |
a920d3da TL |
622 | #if defined (TRACING) |
623 | trace_init (set_time, MDL); | |
98311e4b DH |
624 | if (traceoutfile) { |
625 | result = trace_begin (traceoutfile, MDL); | |
626 | if (result != ISC_R_SUCCESS) | |
627 | log_fatal ("Unable to begin trace: %s", | |
628 | isc_result_totext (result)); | |
629 | } | |
a920d3da TL |
630 | interface_trace_setup (); |
631 | parse_trace_setup (); | |
632 | trace_srandom = trace_type_register ("random-seed", (void *)0, | |
633 | trace_seed_input, | |
634 | trace_seed_stop, MDL); | |
158a34fb | 635 | #if defined (NSUPDATE) |
7aa153b8 | 636 | trace_ddns_init(); |
158a34fb | 637 | #endif /* NSUPDATE */ |
a920d3da TL |
638 | #endif |
639 | ||
63971a83 DH |
640 | #if defined (PARANOIA) |
641 | /* get user and group info if those options were given */ | |
642 | if (set_user) { | |
643 | struct passwd *tmp_pwd; | |
644 | ||
645 | if (geteuid()) | |
646 | log_fatal ("you must be root to set user"); | |
647 | ||
648 | if (!(tmp_pwd = getpwnam(set_user))) | |
649 | log_fatal ("no such user: %s", set_user); | |
650 | ||
651 | set_uid = tmp_pwd->pw_uid; | |
652 | ||
653 | /* use the user's group as the default gid */ | |
654 | if (!set_group) | |
655 | set_gid = tmp_pwd->pw_gid; | |
656 | } | |
657 | ||
658 | if (set_group) { | |
659 | /* get around the ISC declaration of group */ | |
660 | #define group real_group | |
661 | struct group *tmp_grp; | |
662 | ||
663 | if (geteuid()) | |
664 | log_fatal ("you must be root to set group"); | |
665 | ||
666 | if (!(tmp_grp = getgrnam(set_group))) | |
667 | log_fatal ("no such group: %s", set_group); | |
668 | ||
669 | set_gid = tmp_grp->gr_gid; | |
670 | #undef group | |
671 | } | |
672 | ||
673 | # if defined (EARLY_CHROOT) | |
674 | if (set_chroot) setup_chroot (set_chroot); | |
675 | # endif /* EARLY_CHROOT */ | |
676 | #endif /* PARANOIA */ | |
677 | ||
d7837182 | 678 | /* Default to the DHCP/BOOTP port. */ |
a60076f9 | 679 | if (!local_port) |
d7837182 | 680 | { |
a920d3da | 681 | if ((s = getenv ("DHCPD_PORT"))) { |
59112e84 | 682 | local_port = validate_port (s); |
a920d3da TL |
683 | log_debug ("binding to environment-specified port %d", |
684 | ntohs (local_port)); | |
685 | } else { | |
98bd7ca0 DH |
686 | if (local_family == AF_INET) { |
687 | ent = getservbyname("dhcp", "udp"); | |
688 | if (ent == NULL) { | |
689 | local_port = htons(67); | |
690 | } else { | |
691 | local_port = ent->s_port; | |
692 | } | |
693 | } else { | |
694 | /* INSIST(local_family == AF_INET6); */ | |
695 | ent = getservbyname("dhcpv6-server", "udp"); | |
696 | if (ent == NULL) { | |
697 | local_port = htons(547); | |
698 | } else { | |
699 | local_port = ent->s_port; | |
700 | } | |
701 | } | |
1e39d101 | 702 | #ifndef __CYGWIN32__ /* XXX */ |
a920d3da | 703 | endservent (); |
1e39d101 | 704 | #endif |
a920d3da | 705 | } |
d7837182 | 706 | } |
905c58b9 | 707 | |
98bd7ca0 DH |
708 | if (local_family == AF_INET) { |
709 | remote_port = htons(ntohs(local_port) + 1); | |
710 | } else { | |
711 | /* INSIST(local_family == AF_INET6); */ | |
712 | ent = getservbyname("dhcpv6-client", "udp"); | |
713 | if (ent == NULL) { | |
714 | remote_port = htons(546); | |
715 | } else { | |
716 | remote_port = ent->s_port; | |
717 | } | |
718 | } | |
a60076f9 | 719 | |
e3a84e35 | 720 | if (server) { |
2e13ba55 SK |
721 | if (local_family != AF_INET) { |
722 | log_fatal("You can only specify address to send " | |
723 | "replies to when running an IPv4 server."); | |
724 | } | |
e3a84e35 TL |
725 | if (!inet_aton (server, &limited_broadcast)) { |
726 | struct hostent *he; | |
727 | he = gethostbyname (server); | |
728 | if (he) { | |
729 | memcpy (&limited_broadcast, | |
730 | he -> h_addr_list [0], | |
731 | sizeof limited_broadcast); | |
732 | } else | |
733 | limited_broadcast.s_addr = INADDR_BROADCAST; | |
734 | } | |
735 | } else { | |
736 | limited_broadcast.s_addr = INADDR_BROADCAST; | |
737 | } | |
738 | ||
d7837182 | 739 | /* Get the current time... */ |
be62cf06 | 740 | gettimeofday(&cur_tv, NULL); |
d7837182 | 741 | |
77222488 TL |
742 | /* Set up the initial dhcp option universe. */ |
743 | initialize_common_option_spaces (); | |
744 | initialize_server_option_spaces (); | |
745 | ||
fafe8463 TL |
746 | /* Add the ddns update style enumeration prior to parsing. */ |
747 | add_enumeration (&ddns_styles); | |
ee5a7404 | 748 | add_enumeration (&syslog_enum); |
33692791 DH |
749 | #if defined (LDAP_CONFIGURATION) |
750 | add_enumeration (&ldap_methods); | |
751 | #if defined (LDAP_USE_SSL) | |
752 | add_enumeration (&ldap_ssl_usage_enum); | |
753 | add_enumeration (&ldap_tls_reqcert_enum); | |
754 | add_enumeration (&ldap_tls_crlcheck_enum); | |
755 | #endif | |
756 | #endif | |
fafe8463 | 757 | |
20916cae TL |
758 | if (!group_allocate (&root_group, MDL)) |
759 | log_fatal ("Can't allocate root group!"); | |
760 | root_group -> authoritative = 0; | |
77222488 | 761 | |
a920d3da TL |
762 | /* Set up various hooks. */ |
763 | dhcp_interface_setup_hook = dhcpd_interface_setup_hook; | |
764 | bootp_packet_handler = do_packet; | |
fe5b0fdd | 765 | #ifdef DHCPv6 |
1a006ff6 | 766 | add_enumeration (&prefix_length_modes); |
98bd7ca0 | 767 | dhcpv6_packet_handler = do_packet6; |
fe5b0fdd | 768 | #endif /* DHCPv6 */ |
a920d3da | 769 | |
144cdb49 | 770 | #if defined (NSUPDATE) |
77222488 | 771 | /* Set up the standard name service updater routine. */ |
c40e954c EH |
772 | parse = NULL; |
773 | status = new_parse(&parse, -1, std_nsupdate, sizeof(std_nsupdate) - 1, | |
dc66a995 | 774 | "standard name service update routine", 0); |
77222488 | 775 | if (status != ISC_R_SUCCESS) |
d8e1567c | 776 | log_fatal ("can't begin parsing name service updater!"); |
77222488 | 777 | |
c40e954c EH |
778 | if (parse != NULL) { |
779 | lose = 0; | |
780 | if (!(parse_executable_statements(&root_group->statements, | |
781 | parse, &lose, context_any))) { | |
782 | end_parse(&parse); | |
783 | log_fatal("can't parse standard name service updater!"); | |
784 | } | |
785 | end_parse(&parse); | |
77222488 | 786 | } |
144cdb49 | 787 | #endif |
77222488 | 788 | |
a920d3da | 789 | /* Initialize icmp support... */ |
30a122ee TL |
790 | if (!cftest && !lftest) |
791 | icmp_startup (1, lease_pinged); | |
a920d3da TL |
792 | |
793 | #if defined (TRACING) | |
794 | if (traceinfile) { | |
ab77c8b8 | 795 | if (!have_dhcpd_db) { |
a920d3da TL |
796 | log_error ("%s", ""); |
797 | log_error ("** You must specify a lease file with -lf."); | |
798 | log_error (" Dhcpd will not overwrite your default"); | |
799 | log_fatal (" lease file when playing back a trace. **"); | |
905c58b9 | 800 | } |
a920d3da | 801 | trace_file_replay (traceinfile); |
d758ad8c | 802 | |
98311e4b | 803 | #if defined (DEBUG_MEMORY_LEAKAGE) && \ |
d758ad8c TL |
804 | defined (DEBUG_MEMORY_LEAKAGE_ON_EXIT) |
805 | free_everything (); | |
905c58b9 | 806 | omapi_print_dmalloc_usage_by_caller (); |
d758ad8c TL |
807 | #endif |
808 | ||
a920d3da TL |
809 | exit (0); |
810 | } | |
811 | #endif | |
812 | ||
98bd7ca0 | 813 | #ifdef DHCPv6 |
1d9774ab | 814 | /* set up DHCPv6 hashes */ |
9322442f | 815 | if (!ia_new_hash(&ia_na_active, DEFAULT_HASH_SIZE, MDL)) { |
1d9774ab FD |
816 | log_fatal("Out of memory creating hash for active IA_NA."); |
817 | } | |
9322442f | 818 | if (!ia_new_hash(&ia_ta_active, DEFAULT_HASH_SIZE, MDL)) { |
1d9774ab FD |
819 | log_fatal("Out of memory creating hash for active IA_TA."); |
820 | } | |
9322442f | 821 | if (!ia_new_hash(&ia_pd_active, DEFAULT_HASH_SIZE, MDL)) { |
1d9774ab | 822 | log_fatal("Out of memory creating hash for active IA_PD."); |
98bd7ca0 DH |
823 | } |
824 | #endif /* DHCPv6 */ | |
825 | ||
d7837182 | 826 | /* Read the dhcpd.conf file... */ |
8f450cac | 827 | if (readconf () != ISC_R_SUCCESS) |
8ae2d595 | 828 | log_fatal ("Configuration file errors encountered -- exiting"); |
d7837182 | 829 | |
d758ad8c | 830 | postconf_initialization (quiet); |
3956569b | 831 | |
6ec59010 TM |
832 | #if defined (FAILOVER_PROTOCOL) |
833 | dhcp_failover_sanity_check(); | |
834 | #endif | |
835 | ||
785c1a51 FD |
836 | #if defined(DHCPv6) && defined(DHCP4o6) |
837 | if (dhcpv4_over_dhcpv6) { | |
838 | if ((local_family == AF_INET) && (interfaces != NULL)) | |
839 | log_fatal("DHCPv4 server in DHPv4 over DHCPv6 " | |
840 | "mode with config file specified " | |
841 | "interfaces."); | |
842 | } | |
843 | #endif /* DHCPv6 && DHCP4o6 */ | |
844 | ||
63971a83 DH |
845 | #if defined (PARANOIA) && !defined (EARLY_CHROOT) |
846 | if (set_chroot) setup_chroot (set_chroot); | |
847 | #endif /* PARANOIA && !EARLY_CHROOT */ | |
d758ad8c | 848 | |
fb98e02e TM |
849 | #ifdef DHCPv6 |
850 | /* log info about ipv6_ponds with large address ranges */ | |
851 | report_jumbo_ranges(); | |
852 | #endif | |
853 | ||
40f63fcd | 854 | /* test option should cause an early exit */ |
c2e5ee28 | 855 | if (cftest && !lftest) { |
40f63fcd | 856 | exit(0); |
c2e5ee28 | 857 | } |
40f63fcd | 858 | |
992dc765 SR |
859 | /* |
860 | * First part of dealing with pid files. Check to see if | |
861 | * we should continue running or not. We run if: | |
862 | * - we are testing the lease file out | |
863 | * - we don't have a pid file to check | |
864 | * - there is no other process running | |
865 | */ | |
866 | if ((lftest == 0) && (no_pid_file == ISC_FALSE)) { | |
867 | /*Read previous pid file. */ | |
868 | if ((i = open(path_dhcpd_pid, O_RDONLY)) >= 0) { | |
869 | status = read(i, pbuf, (sizeof pbuf) - 1); | |
870 | close(i); | |
871 | if (status > 0) { | |
872 | pbuf[status] = 0; | |
873 | pid = atoi(pbuf); | |
874 | ||
875 | /* | |
876 | * If there was a previous server process and | |
877 | * it is still running, abort | |
878 | */ | |
879 | if (!pid || | |
880 | (pid != getpid() && kill(pid, 0) == 0)) | |
881 | log_fatal("There's already a " | |
882 | "DHCP server running."); | |
883 | } | |
884 | } | |
885 | } | |
886 | ||
a920d3da TL |
887 | group_write_hook = group_writer; |
888 | ||
889 | /* Start up the database... */ | |
890 | db_startup (lftest); | |
891 | ||
892 | if (lftest) | |
893 | exit (0); | |
894 | ||
895 | /* Discover all the network interfaces and initialize them. */ | |
785c1a51 FD |
896 | #if defined(DHCPv6) && defined(DHCP4o6) |
897 | if (dhcpv4_over_dhcpv6) { | |
898 | int real_family = local_family; | |
899 | local_family = AF_INET6; | |
900 | /* The DHCPv4 side of DHCPv4-over-DHCPv6 service | |
901 | uses a specific discovery which doesn't register | |
902 | DHCPv6 sockets. */ | |
903 | if (real_family == AF_INET) | |
904 | discover_interfaces(DISCOVER_SERVER46); | |
905 | else | |
906 | discover_interfaces(DISCOVER_SERVER); | |
907 | local_family = real_family; | |
908 | } else | |
909 | #endif /* DHCPv6 && DHCP4o6 */ | |
98bd7ca0 DH |
910 | discover_interfaces(DISCOVER_SERVER); |
911 | ||
912 | #ifdef DHCPv6 | |
913 | /* | |
914 | * Remove addresses from our pools that we should not issue | |
915 | * to clients. | |
c61eba3b | 916 | * |
905c58b9 TM |
917 | * We currently have no support for this in IPv4. It is not |
918 | * as important in IPv4, as making pools with ranges that | |
c61eba3b SK |
919 | * leave out interfaces and hosts is fairly straightforward |
920 | * using range notation, but not so handy with CIDR notation. | |
98bd7ca0 | 921 | */ |
c61eba3b SK |
922 | if (local_family == AF_INET6) { |
923 | mark_hosts_unavailable(); | |
80c9fdb0 | 924 | mark_phosts_unavailable(); |
c61eba3b SK |
925 | mark_interfaces_unavailable(); |
926 | } | |
98bd7ca0 DH |
927 | #endif /* DHCPv6 */ |
928 | ||
a920d3da TL |
929 | /* Make up a seed for the random number generator from current |
930 | time plus the sum of the last four bytes of each | |
931 | interface's hardware address interpreted as an integer. | |
932 | Not much entropy, but we're booting, so we're not likely to | |
933 | find anything better. */ | |
934 | seed = 0; | |
935 | for (ip = interfaces; ip; ip = ip -> next) { | |
936 | int junk; | |
937 | memcpy (&junk, | |
938 | &ip -> hw_address.hbuf [ip -> hw_address.hlen - | |
939 | sizeof seed], sizeof seed); | |
940 | seed += junk; | |
941 | } | |
942 | srandom (seed + cur_time); | |
943 | #if defined (TRACING) | |
944 | trace_seed_stash (trace_srandom, seed + cur_time); | |
945 | #endif | |
d758ad8c | 946 | postdb_startup (); |
a920d3da | 947 | |
fe5b0fdd | 948 | #ifdef DHCPv6 |
98bd7ca0 | 949 | /* |
90a062fb SR |
950 | * Set server DHCPv6 identifier - we go in order: |
951 | * dhcp6.server-id in the config file | |
952 | * server-duid from the lease file | |
953 | * server-duid from the config file (the config file is read first | |
954 | * and the lease file overwrites the config file information) | |
785c1a51 | 955 | * generate a new one from the interface hardware addresses. |
90a062fb | 956 | * In all cases we write it out to the lease file. |
98bd7ca0 DH |
957 | * See dhcpv6.c for discussion of setting DUID. |
958 | */ | |
90a062fb SR |
959 | if ((set_server_duid_from_option() != ISC_R_SUCCESS) && |
960 | (!server_duid_isset()) && | |
961 | (generate_new_server_duid() != ISC_R_SUCCESS)) { | |
962 | log_fatal("Unable to set server identifier."); | |
98bd7ca0 | 963 | } |
90a062fb | 964 | write_server_duid(); |
785c1a51 FD |
965 | #ifdef DHCP4o6 |
966 | if (dhcpv4_over_dhcpv6) | |
967 | dhcp4o6_setup(dhcp4o6_port); | |
968 | #endif /* DHCP4o6 */ | |
fe5b0fdd | 969 | #endif /* DHCPv6 */ |
98bd7ca0 | 970 | |
a920d3da | 971 | #ifndef DEBUG |
4a5bfeac | 972 | /* |
992dc765 SR |
973 | * Second part of dealing with pid files. Now |
974 | * that we have forked we can write our pid if | |
975 | * appropriate. | |
4a5bfeac SR |
976 | */ |
977 | if (no_pid_file == ISC_FALSE) { | |
4a5bfeac SR |
978 | i = open(path_dhcpd_pid, O_WRONLY|O_CREAT|O_TRUNC, 0644); |
979 | if (i >= 0) { | |
980 | sprintf(pbuf, "%d\n", (int) getpid()); | |
992dc765 | 981 | IGNORE_RET(write(i, pbuf, strlen(pbuf))); |
4a5bfeac SR |
982 | close(i); |
983 | } else { | |
984 | log_error("Can't create PID file %s: %m.", | |
985 | path_dhcpd_pid); | |
986 | } | |
987 | } | |
182b187e | 988 | |
d8c7c34e SR |
989 | #if defined (PARANOIA) |
990 | /* change uid to the specified one */ | |
991 | ||
992 | if (set_gid) { | |
993 | if (setgroups (0, (void *)0)) | |
994 | log_fatal ("setgroups: %m"); | |
995 | if (setgid (set_gid)) | |
996 | log_fatal ("setgid(%d): %m", (int) set_gid); | |
905c58b9 | 997 | } |
d8c7c34e SR |
998 | |
999 | if (set_uid) { | |
1000 | if (setuid (set_uid)) | |
1001 | log_fatal ("setuid(%d): %m", (int) set_uid); | |
1002 | } | |
1003 | #endif /* PARANOIA */ | |
1004 | ||
a920d3da TL |
1005 | /* If we were requested to log to stdout on the command line, |
1006 | keep doing so; otherwise, stop. */ | |
1007 | if (log_perror == -1) | |
1008 | log_perror = 1; | |
1009 | else | |
1010 | log_perror = 0; | |
1011 | ||
1012 | if (daemon) { | |
29b23207 FD |
1013 | if (dfd[0] != -1 && dfd[1] != -1) { |
1014 | char buf = 0; | |
1015 | ||
1016 | if (write(dfd[1], &buf, 1) != 1) | |
1017 | log_fatal("write to parent: %m"); | |
1018 | (void) close(dfd[1]); | |
1019 | dfd[0] = dfd[1] = -1; | |
1020 | } | |
1021 | ||
a920d3da | 1022 | /* Become session leader and get pid... */ |
dc9d7b08 | 1023 | (void) setsid(); |
185d16f9 SK |
1024 | |
1025 | /* Close standard I/O descriptors. */ | |
dc9d7b08 MA |
1026 | (void) close(0); |
1027 | (void) close(1); | |
1028 | (void) close(2); | |
185d16f9 SK |
1029 | |
1030 | /* Reopen them on /dev/null. */ | |
dc9d7b08 MA |
1031 | (void) open("/dev/null", O_RDWR); |
1032 | (void) open("/dev/null", O_RDWR); | |
1033 | (void) open("/dev/null", O_RDWR); | |
185d16f9 | 1034 | log_perror = 0; /* No sense logging to /dev/null. */ |
a920d3da | 1035 | |
ae566556 | 1036 | IGNORE_RET (chdir("/")); |
a920d3da TL |
1037 | } |
1038 | #endif /* !DEBUG */ | |
1039 | ||
d758ad8c TL |
1040 | #if defined (DEBUG_MEMORY_LEAKAGE) || defined (DEBUG_MALLOC_POOL) || \ |
1041 | defined (DEBUG_MEMORY_LEAKAGE_ON_EXIT) | |
a920d3da TL |
1042 | dmalloc_cutoff_generation = dmalloc_generation; |
1043 | dmalloc_longterm = dmalloc_outstanding; | |
1044 | dmalloc_outstanding = 0; | |
1045 | #endif | |
1046 | ||
d758ad8c TL |
1047 | omapi_set_int_value ((omapi_object_t *)dhcp_control_object, |
1048 | (omapi_object_t *)0, "state", server_running); | |
1049 | ||
e9326fd0 SR |
1050 | #if defined(ENABLE_GENTLE_SHUTDOWN) |
1051 | /* no signal handlers until we deal with the side effects */ | |
47e8308d SR |
1052 | /* install signal handlers */ |
1053 | signal(SIGINT, dhcp_signal_handler); /* control-c */ | |
1054 | signal(SIGTERM, dhcp_signal_handler); /* kill */ | |
e9326fd0 | 1055 | #endif |
47e8308d | 1056 | |
f88446f1 SR |
1057 | /* Log that we are about to start working */ |
1058 | log_info("Server starting service."); | |
1059 | ||
47e8308d SR |
1060 | /* |
1061 | * Receive packets and dispatch them... | |
0895c955 | 1062 | * dispatch() will never return. |
47e8308d | 1063 | */ |
a920d3da TL |
1064 | dispatch (); |
1065 | ||
47e8308d | 1066 | /* Let's return status code */ |
a920d3da TL |
1067 | return 0; |
1068 | } | |
98bd7ca0 | 1069 | #endif /* !UNIT_TEST */ |
a920d3da TL |
1070 | |
1071 | void postconf_initialization (int quiet) | |
1072 | { | |
cde11a4c | 1073 | struct option_state *options = NULL; |
a920d3da TL |
1074 | struct data_string db; |
1075 | struct option_cache *oc; | |
1076 | char *s; | |
1077 | isc_result_t result; | |
a920d3da | 1078 | int tmp; |
61ef216b SR |
1079 | #if defined (NSUPDATE) |
1080 | struct in_addr local4, *local4_ptr = NULL; | |
1081 | struct in6_addr local6, *local6_ptr = NULL; | |
1082 | #endif | |
a920d3da | 1083 | |
b62e4418 | 1084 | /* Now try to get the lease file name. */ |
cde11a4c | 1085 | option_state_allocate(&options, MDL); |
b62e4418 | 1086 | |
a7341359 SR |
1087 | execute_statements_in_scope(NULL, NULL, NULL, NULL, NULL, |
1088 | options, &global_scope, root_group, | |
1089 | NULL, NULL); | |
cde11a4c SR |
1090 | memset(&db, 0, sizeof db); |
1091 | oc = lookup_option(&server_universe, options, SV_LEASE_FILE_NAME); | |
b62e4418 | 1092 | if (oc && |
cde11a4c SR |
1093 | evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, |
1094 | &global_scope, oc, MDL)) { | |
1095 | s = dmalloc(db.len + 1, MDL); | |
b62e4418 | 1096 | if (!s) |
cde11a4c SR |
1097 | log_fatal("no memory for lease db filename."); |
1098 | memcpy(s, db.data, db.len); | |
1099 | s[db.len] = 0; | |
1100 | data_string_forget(&db, MDL); | |
b62e4418 TL |
1101 | path_dhcpd_db = s; |
1102 | } | |
75135a3f | 1103 | |
cde11a4c | 1104 | oc = lookup_option(&server_universe, options, SV_PID_FILE_NAME); |
b62e4418 | 1105 | if (oc && |
cde11a4c SR |
1106 | evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, |
1107 | &global_scope, oc, MDL)) { | |
1108 | s = dmalloc(db.len + 1, MDL); | |
b62e4418 | 1109 | if (!s) |
cde11a4c SR |
1110 | log_fatal("no memory for pid filename."); |
1111 | memcpy(s, db.data, db.len); | |
1112 | s[db.len] = 0; | |
1113 | data_string_forget(&db, MDL); | |
b62e4418 TL |
1114 | path_dhcpd_pid = s; |
1115 | } | |
1116 | ||
75135a3f EH |
1117 | #ifdef DHCPv6 |
1118 | if (local_family == AF_INET6) { | |
1119 | /* | |
1120 | * Override lease file name with dhcpv6 lease file name, | |
1121 | * if it was set; then, do the same with the pid file name | |
1122 | */ | |
1123 | oc = lookup_option(&server_universe, options, | |
1124 | SV_DHCPV6_LEASE_FILE_NAME); | |
1125 | if (oc && | |
cde11a4c SR |
1126 | evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, |
1127 | &global_scope, oc, MDL)) { | |
1128 | s = dmalloc(db.len + 1, MDL); | |
75135a3f | 1129 | if (!s) |
cde11a4c SR |
1130 | log_fatal("no memory for lease db filename."); |
1131 | memcpy(s, db.data, db.len); | |
1132 | s[db.len] = 0; | |
1133 | data_string_forget(&db, MDL); | |
75135a3f EH |
1134 | path_dhcpd_db = s; |
1135 | } | |
1136 | ||
1137 | oc = lookup_option(&server_universe, options, | |
1138 | SV_DHCPV6_PID_FILE_NAME); | |
1139 | if (oc && | |
cde11a4c SR |
1140 | evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, |
1141 | &global_scope, oc, MDL)) { | |
1142 | s = dmalloc(db.len + 1, MDL); | |
75135a3f | 1143 | if (!s) |
cde11a4c SR |
1144 | log_fatal("no memory for pid filename."); |
1145 | memcpy(s, db.data, db.len); | |
1146 | s[db.len] = 0; | |
1147 | data_string_forget(&db, MDL); | |
75135a3f EH |
1148 | path_dhcpd_pid = s; |
1149 | } | |
a2a0f98c FD |
1150 | |
1151 | oc = lookup_option(&server_universe, options, | |
1152 | SV_LOCAL_ADDRESS6); | |
1153 | if (oc && | |
1154 | evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, | |
1155 | &global_scope, oc, MDL)) { | |
1156 | if (db.len == 16) { | |
1157 | memcpy(&local_address6, db.data, 16); | |
1158 | } else | |
1159 | log_fatal("invalid local address " | |
1160 | "data length"); | |
1161 | data_string_forget(&db, MDL); | |
1162 | } | |
1163 | ||
1164 | oc = lookup_option(&server_universe, options, | |
1165 | SV_BIND_LOCAL_ADDRESS6); | |
1166 | if (oc && | |
1167 | evaluate_boolean_option_cache(NULL, NULL, NULL, | |
1168 | NULL, options, NULL, | |
1169 | &global_scope, oc, MDL)) { | |
1170 | bind_local_address6 = 1; | |
1171 | } | |
1172 | ||
75135a3f EH |
1173 | } |
1174 | #endif /* DHCPv6 */ | |
1175 | ||
312a6a35 | 1176 | omapi_port = -1; |
cde11a4c | 1177 | oc = lookup_option(&server_universe, options, SV_OMAPI_PORT); |
ece9e253 | 1178 | if (oc && |
cde11a4c SR |
1179 | evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, |
1180 | &global_scope, oc, MDL)) { | |
ece9e253 | 1181 | if (db.len == 2) { |
cde11a4c | 1182 | omapi_port = getUShort(db.data); |
ece9e253 | 1183 | } else |
cde11a4c SR |
1184 | log_fatal("invalid omapi port data length"); |
1185 | data_string_forget(&db, MDL); | |
ece9e253 TL |
1186 | } |
1187 | ||
cde11a4c | 1188 | oc = lookup_option(&server_universe, options, SV_OMAPI_KEY); |
49146f3c | 1189 | if (oc && |
cde11a4c SR |
1190 | evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, |
1191 | &global_scope, oc, MDL)) { | |
1192 | s = dmalloc(db.len + 1, MDL); | |
49146f3c | 1193 | if (!s) |
cde11a4c SR |
1194 | log_fatal("no memory for OMAPI key filename."); |
1195 | memcpy(s, db.data, db.len); | |
1196 | s[db.len] = 0; | |
1197 | data_string_forget(&db, MDL); | |
1198 | result = omapi_auth_key_lookup_name(&omapi_key, s); | |
1199 | dfree(s, MDL); | |
49146f3c | 1200 | if (result != ISC_R_SUCCESS) |
cde11a4c SR |
1201 | log_fatal("OMAPI key %s: %s", |
1202 | s, isc_result_totext (result)); | |
49146f3c DN |
1203 | } |
1204 | ||
cde11a4c | 1205 | oc = lookup_option(&server_universe, options, SV_LOCAL_PORT); |
ece9e253 | 1206 | if (oc && |
cde11a4c SR |
1207 | evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, |
1208 | &global_scope, oc, MDL)) { | |
ece9e253 | 1209 | if (db.len == 2) { |
cde11a4c | 1210 | local_port = htons(getUShort (db.data)); |
ece9e253 | 1211 | } else |
cde11a4c SR |
1212 | log_fatal("invalid local port data length"); |
1213 | data_string_forget(&db, MDL); | |
ece9e253 TL |
1214 | } |
1215 | ||
cde11a4c | 1216 | oc = lookup_option(&server_universe, options, SV_REMOTE_PORT); |
ece9e253 | 1217 | if (oc && |
cde11a4c SR |
1218 | evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, |
1219 | &global_scope, oc, MDL)) { | |
ece9e253 | 1220 | if (db.len == 2) { |
cde11a4c | 1221 | remote_port = htons(getUShort (db.data)); |
ece9e253 | 1222 | } else |
cde11a4c SR |
1223 | log_fatal("invalid remote port data length"); |
1224 | data_string_forget(&db, MDL); | |
ece9e253 TL |
1225 | } |
1226 | ||
cde11a4c SR |
1227 | oc = lookup_option(&server_universe, options, |
1228 | SV_LIMITED_BROADCAST_ADDRESS); | |
ece9e253 | 1229 | if (oc && |
cde11a4c SR |
1230 | evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, |
1231 | &global_scope, oc, MDL)) { | |
ece9e253 | 1232 | if (db.len == 4) { |
cde11a4c | 1233 | memcpy(&limited_broadcast, db.data, 4); |
ece9e253 | 1234 | } else |
cde11a4c SR |
1235 | log_fatal("invalid broadcast address data length"); |
1236 | data_string_forget(&db, MDL); | |
ece9e253 TL |
1237 | } |
1238 | ||
cde11a4c | 1239 | oc = lookup_option(&server_universe, options, SV_LOCAL_ADDRESS); |
ece9e253 | 1240 | if (oc && |
cde11a4c SR |
1241 | evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, |
1242 | &global_scope, oc, MDL)) { | |
ece9e253 | 1243 | if (db.len == 4) { |
cde11a4c | 1244 | memcpy(&local_address, db.data, 4); |
ece9e253 | 1245 | } else |
cde11a4c SR |
1246 | log_fatal("invalid local address data length"); |
1247 | data_string_forget(&db, MDL); | |
ece9e253 TL |
1248 | } |
1249 | ||
cde11a4c | 1250 | oc = lookup_option(&server_universe, options, SV_DDNS_UPDATE_STYLE); |
fafe8463 | 1251 | if (oc) { |
cde11a4c SR |
1252 | if (evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, |
1253 | &global_scope, oc, MDL)) { | |
fafe8463 | 1254 | if (db.len == 1) { |
cde11a4c | 1255 | ddns_update_style = db.data[0]; |
fafe8463 | 1256 | } else |
cde11a4c SR |
1257 | log_fatal("invalid dns update type"); |
1258 | data_string_forget(&db, MDL); | |
fafe8463 | 1259 | } |
d7f6db15 | 1260 | } else { |
884a458f | 1261 | ddns_update_style = DDNS_UPDATE_STYLE_NONE; |
d7f6db15 | 1262 | } |
98bf1607 SR |
1263 | #if defined (NSUPDATE) |
1264 | /* We no longer support ad_hoc, tell the user */ | |
1265 | if (ddns_update_style == DDNS_UPDATE_STYLE_AD_HOC) { | |
1266 | log_fatal("ddns-update-style ad_hoc no longer supported"); | |
1267 | } | |
61ef216b SR |
1268 | |
1269 | oc = lookup_option(&server_universe, options, SV_DDNS_LOCAL_ADDRESS4); | |
1270 | if (oc) { | |
1271 | if (evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, | |
1272 | &global_scope, oc, MDL)) { | |
1273 | if (db.len == 4) { | |
1274 | memcpy(&local4, db.data, 4); | |
1275 | local4_ptr = &local4; | |
1276 | } | |
1277 | data_string_forget(&db, MDL); | |
1278 | } | |
1279 | } | |
1280 | ||
1281 | oc = lookup_option(&server_universe, options, SV_DDNS_LOCAL_ADDRESS6); | |
1282 | if (oc) { | |
1283 | if (evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, | |
1284 | &global_scope, oc, MDL)) { | |
1285 | if (db.len == 16) { | |
1286 | memcpy(&local6, db.data, 16); | |
1287 | local6_ptr = &local6; | |
1288 | } | |
1289 | data_string_forget(&db, MDL); | |
1290 | } | |
1291 | } | |
1292 | ||
ca22af89 TM |
1293 | /* Don't init DNS client if update style is none. This avoids |
1294 | * listening ports that aren't needed. We don't use ddns-udpates | |
1295 | * as that has multiple levels of scope. */ | |
1296 | if (ddns_update_style != DDNS_UPDATE_STYLE_NONE) { | |
1297 | if (dhcp_context_create(DHCP_CONTEXT_POST_DB, | |
1298 | local4_ptr, local6_ptr) | |
1299 | != ISC_R_SUCCESS) { | |
1300 | log_fatal("Unable to complete ddns initialization"); | |
1301 | } | |
1302 | } | |
905c58b9 TM |
1303 | |
1304 | /* Set the conflict detection flag mask based on globally | |
1305 | * defined DDNS configuration params. This mask should be | |
1306 | * to init ddns_cb::flags before for every DDNS transaction. */ | |
1307 | ddns_conflict_mask = get_conflict_mask(options); | |
1308 | ||
98bf1607 SR |
1309 | #else |
1310 | /* If we don't have support for updates compiled in tell the user */ | |
1311 | if (ddns_update_style != DDNS_UPDATE_STYLE_NONE) { | |
1312 | log_fatal("Support for ddns-update-style not compiled in"); | |
1313 | } | |
1314 | #endif | |
fafe8463 | 1315 | |
3956569b TM |
1316 | if (!quiet) { |
1317 | log_info ("Config file: %s", path_dhcpd_conf); | |
1318 | log_info ("Database file: %s", path_dhcpd_db); | |
1319 | log_info ("PID file: %s", path_dhcpd_pid); | |
1320 | } | |
1321 | ||
cde11a4c | 1322 | oc = lookup_option(&server_universe, options, SV_LOG_FACILITY); |
ee5a7404 | 1323 | if (oc) { |
cde11a4c SR |
1324 | if (evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, |
1325 | &global_scope, oc, MDL)) { | |
ee5a7404 TL |
1326 | if (db.len == 1) { |
1327 | closelog (); | |
7acd8753 FD |
1328 | openlog(isc_file_basename(progname), |
1329 | DHCP_LOG_OPTIONS, db.data[0]); | |
a920d3da TL |
1330 | /* Log the startup banner into the new |
1331 | log file. */ | |
3956569b TM |
1332 | /* Don't log to stderr twice. */ |
1333 | tmp = log_perror; | |
1334 | log_perror = 0; | |
1335 | log_info("%s %s", message, PACKAGE_VERSION); | |
1336 | log_info(copyright); | |
1337 | log_info(arr); | |
1338 | log_info(url); | |
1339 | log_perror = tmp; | |
ee5a7404 | 1340 | } else |
cde11a4c SR |
1341 | log_fatal("invalid log facility"); |
1342 | data_string_forget(&db, MDL); | |
ee5a7404 TL |
1343 | } |
1344 | } | |
e422b8c7 TM |
1345 | |
1346 | #if defined(DELAYED_ACK) | |
6368a1bd DH |
1347 | oc = lookup_option(&server_universe, options, SV_DELAYED_ACK); |
1348 | if (oc && | |
1349 | evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, | |
1350 | &global_scope, oc, MDL)) { | |
1351 | if (db.len == 2) { | |
1352 | max_outstanding_acks = htons(getUShort(db.data)); | |
1353 | } else { | |
1354 | log_fatal("invalid max delayed ACK count "); | |
1355 | } | |
1356 | data_string_forget(&db, MDL); | |
1357 | } | |
700e3fca TM |
1358 | #if defined(DHCP4o6) |
1359 | /* Delayed acks and DHCPv4-over-DHCPv6 are incompatible */ | |
1360 | if (dhcpv4_over_dhcpv6) { | |
1361 | if (max_outstanding_acks > 0) { | |
1362 | log_debug("DHCP4o6 enabled, " | |
1363 | "setting delayed-ack to zero (incompatible)"); | |
1364 | } | |
1365 | ||
1366 | max_outstanding_acks = 0; | |
1367 | } | |
1368 | #endif | |
ee5a7404 | 1369 | |
f8cbf390 DH |
1370 | oc = lookup_option(&server_universe, options, SV_MAX_ACK_DELAY); |
1371 | if (oc && | |
1372 | evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, | |
1373 | &global_scope, oc, MDL)) { | |
1374 | u_int32_t timeval; | |
1375 | ||
1376 | if (db.len != 4) | |
1377 | log_fatal("invalid max ack delay configuration"); | |
1378 | ||
1379 | timeval = getULong(db.data); | |
1380 | max_ack_delay_secs = timeval / 1000000; | |
1381 | max_ack_delay_usecs = timeval % 1000000; | |
1382 | ||
1383 | data_string_forget(&db, MDL); | |
1384 | } | |
e422b8c7 | 1385 | #endif |
f8cbf390 | 1386 | |
cde11a4c SR |
1387 | oc = lookup_option(&server_universe, options, SV_DONT_USE_FSYNC); |
1388 | if ((oc != NULL) && | |
1389 | evaluate_boolean_option_cache(NULL, NULL, NULL, NULL, options, NULL, | |
1390 | &global_scope, oc, MDL)) { | |
1391 | dont_use_fsync = 1; | |
1392 | log_error("Not using fsync() to flush lease writes"); | |
1393 | } | |
1394 | ||
7116a34f TM |
1395 | oc = lookup_option(&server_universe, options, SV_SERVER_ID_CHECK); |
1396 | if ((oc != NULL) && | |
1397 | evaluate_boolean_option_cache(NULL, NULL, NULL, NULL, options, NULL, | |
1398 | &global_scope, oc, MDL)) { | |
1399 | log_info("Setting server-id-check true"); | |
1400 | server_id_check = 1; | |
1401 | } | |
1402 | ||
bafa7b74 | 1403 | #ifdef DHCPv6 |
1a006ff6 | 1404 | oc = lookup_option(&server_universe, options, SV_PREFIX_LEN_MODE); |
905c58b9 | 1405 | if ((oc != NULL) && |
1a006ff6 TM |
1406 | evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, |
1407 | &global_scope, oc, MDL)) { | |
1408 | if (db.len == 1) { | |
1409 | prefix_length_mode = db.data[0]; | |
1410 | } else { | |
1411 | log_fatal("invalid prefix-len-mode"); | |
1412 | } | |
1413 | ||
1414 | data_string_forget(&db, MDL); | |
1415 | } | |
bafa7b74 | 1416 | #endif |
1a006ff6 | 1417 | |
a5252220 TM |
1418 | // Set global abandon-lease-time option. |
1419 | oc = lookup_option (&server_universe, options, SV_ABANDON_LEASE_TIME); | |
1420 | if ((oc != NULL) && | |
1421 | evaluate_option_cache(&db, NULL, NULL, NULL, options, NULL, | |
1422 | &global_scope, oc, MDL)) { | |
1423 | if (db.len == sizeof (u_int32_t)) { | |
1424 | abandon_lease_time = getULong (db.data); | |
1425 | } else { | |
1426 | log_fatal("invalid abandon-lease-time"); | |
1427 | } | |
1428 | ||
1429 | data_string_forget (&db, MDL); | |
1430 | } | |
1431 | ||
30593241 TM |
1432 | #if defined (FAILOVER_PROTOCOL) |
1433 | oc = lookup_option(&server_universe, options, SV_CHECK_SECS_BYTE_ORDER); | |
1434 | if ((oc != NULL) && | |
1435 | evaluate_boolean_option_cache(NULL, NULL, NULL, NULL, options, NULL, | |
1436 | &global_scope, oc, MDL)) { | |
1437 | check_secs_byte_order = 1; | |
1438 | } | |
1439 | #endif | |
c2e5ee28 TM |
1440 | |
1441 | #ifdef EUI_64 | |
1442 | oc = lookup_option(&server_universe, options, SV_PERSIST_EUI_64_LEASES); | |
1443 | if (oc != NULL) { | |
1444 | persist_eui64 = evaluate_boolean_option_cache(NULL, NULL, NULL, | |
1445 | NULL, options, | |
1446 | NULL, | |
1447 | &global_scope, | |
1448 | oc, MDL); | |
1449 | } | |
1450 | ||
1451 | if (!persist_eui64) { | |
1452 | log_info("EUI64 leases will not be written to lease file"); | |
1453 | } | |
1454 | #endif | |
bafa7b74 TM |
1455 | |
1456 | #ifdef DHCPv6 | |
1457 | oc = lookup_option(&server_universe, options, SV_RELEASE_ON_ROAM); | |
1458 | if (oc != NULL) { | |
1459 | do_release_on_roam = | |
1460 | evaluate_boolean_option_cache(NULL, NULL, NULL, NULL, | |
1461 | options, NULL, | |
1462 | &global_scope, oc, MDL); | |
1463 | } | |
1464 | #endif | |
30593241 | 1465 | |
3933e2aa SR |
1466 | #if defined (BINARY_LEASES) |
1467 | if (local_family == AF_INET) { | |
1468 | log_info("Source compiled to use binary-leases"); | |
1469 | } | |
1470 | #endif | |
1471 | ||
b62e4418 | 1472 | /* Don't need the options anymore. */ |
cde11a4c | 1473 | option_state_dereference(&options, MDL); |
d7837182 TL |
1474 | } |
1475 | ||
d758ad8c TL |
1476 | void postdb_startup (void) |
1477 | { | |
1478 | /* Initialize the omapi listener state. */ | |
1479 | if (omapi_port != -1) { | |
1480 | omapi_listener_start (0); | |
1481 | } | |
1482 | ||
1483 | #if defined (FAILOVER_PROTOCOL) | |
1484 | /* Initialize the failover listener state. */ | |
1485 | dhcp_failover_startup (); | |
1486 | #endif | |
d9b43370 SK |
1487 | |
1488 | /* | |
1489 | * Begin our lease timeout background task. | |
1490 | */ | |
1491 | schedule_all_ipv6_lease_timeouts(); | |
d758ad8c TL |
1492 | } |
1493 | ||
9acb0bab TL |
1494 | void lease_pinged (from, packet, length) |
1495 | struct iaddr from; | |
1496 | u_int8_t *packet; | |
1497 | int length; | |
1498 | { | |
1499 | struct lease *lp; | |
1500 | ||
1501 | /* Don't try to look up a pinged lease if we aren't trying to | |
1502 | ping one - otherwise somebody could easily make us churn by | |
1503 | just forging repeated ICMP EchoReply packets for us to look | |
1504 | up. */ | |
1505 | if (!outstanding_pings) | |
1506 | return; | |
1507 | ||
20916cae TL |
1508 | lp = (struct lease *)0; |
1509 | if (!find_lease_by_ip_addr (&lp, from, MDL)) { | |
1510 | log_debug ("unexpected ICMP Echo Reply from %s", | |
1511 | piaddr (from)); | |
9acb0bab TL |
1512 | return; |
1513 | } | |
1514 | ||
1515 | if (!lp -> state) { | |
d8e1567c | 1516 | #if defined (FAILOVER_PROTOCOL) |
b73c184a TL |
1517 | if (!lp -> pool || |
1518 | !lp -> pool -> failover_peer) | |
d8e1567c | 1519 | #endif |
b73c184a TL |
1520 | log_debug ("ICMP Echo Reply for %s late or spurious.", |
1521 | piaddr (from)); | |
20916cae | 1522 | goto out; |
9acb0bab TL |
1523 | } |
1524 | ||
c0a8b011 | 1525 | if (lp -> ends > cur_time) { |
b73c184a | 1526 | log_debug ("ICMP Echo reply while lease %s valid.", |
4bd8800e | 1527 | piaddr (from)); |
c0a8b011 TL |
1528 | } |
1529 | ||
9acb0bab TL |
1530 | /* At this point it looks like we pinged a lease and got a |
1531 | response, which shouldn't have happened. */ | |
4bd8800e TL |
1532 | data_string_forget (&lp -> state -> parameter_request_list, MDL); |
1533 | free_lease_state (lp -> state, MDL); | |
9acb0bab TL |
1534 | lp -> state = (struct lease_state *)0; |
1535 | ||
1536 | abandon_lease (lp, "pinged before offer"); | |
1537 | cancel_timeout (lease_ping_timeout, lp); | |
1538 | --outstanding_pings; | |
20916cae TL |
1539 | out: |
1540 | lease_dereference (&lp, MDL); | |
9acb0bab TL |
1541 | } |
1542 | ||
1543 | void lease_ping_timeout (vlp) | |
1544 | void *vlp; | |
1545 | { | |
1546 | struct lease *lp = vlp; | |
1547 | ||
77222488 TL |
1548 | #if defined (DEBUG_MEMORY_LEAKAGE) |
1549 | unsigned long previous_outstanding = dmalloc_outstanding; | |
1550 | #endif | |
1551 | ||
9acb0bab TL |
1552 | --outstanding_pings; |
1553 | dhcp_reply (lp); | |
77222488 TL |
1554 | |
1555 | #if defined (DEBUG_MEMORY_LEAKAGE) | |
1556 | log_info ("generation %ld: %ld new, %ld outstanding, %ld long-term", | |
1557 | dmalloc_generation, | |
1558 | dmalloc_outstanding - previous_outstanding, | |
1559 | dmalloc_outstanding, dmalloc_longterm); | |
1560 | #endif | |
d758ad8c | 1561 | #if defined (DEBUG_MEMORY_LEAKAGE) |
77222488 TL |
1562 | dmalloc_dump_outstanding (); |
1563 | #endif | |
9acb0bab | 1564 | } |
20916cae TL |
1565 | |
1566 | int dhcpd_interface_setup_hook (struct interface_info *ip, struct iaddr *ia) | |
1567 | { | |
1568 | struct subnet *subnet; | |
1569 | struct shared_network *share; | |
1570 | isc_result_t status; | |
1571 | ||
1572 | /* Special case for fallback network - not sure why this is | |
1573 | necessary. */ | |
1574 | if (!ia) { | |
1575 | const char *fnn = "fallback-net"; | |
20916cae TL |
1576 | status = shared_network_allocate (&ip -> shared_network, MDL); |
1577 | if (status != ISC_R_SUCCESS) | |
1578 | log_fatal ("No memory for shared subnet: %s", | |
1579 | isc_result_totext (status)); | |
1580 | ip -> shared_network -> name = dmalloc (strlen (fnn) + 1, MDL); | |
88c3ff5d TM |
1581 | if (!ip -> shared_network -> name) |
1582 | log_fatal("no memory for shared network"); | |
20916cae TL |
1583 | strcpy (ip -> shared_network -> name, fnn); |
1584 | return 1; | |
1585 | } | |
1586 | ||
1587 | /* If there's a registered subnet for this address, | |
1588 | connect it together... */ | |
1589 | subnet = (struct subnet *)0; | |
1590 | if (find_subnet (&subnet, *ia, MDL)) { | |
1591 | /* If this interface has multiple aliases on the same | |
1592 | subnet, ignore all but the first we encounter. */ | |
1593 | if (!subnet -> interface) { | |
d758ad8c | 1594 | interface_reference (&subnet -> interface, ip, MDL); |
20916cae TL |
1595 | subnet -> interface_address = *ia; |
1596 | } else if (subnet -> interface != ip) { | |
905c58b9 | 1597 | log_error ("Multiple interfaces match the %s: %s %s", |
20916cae TL |
1598 | "same subnet", |
1599 | subnet -> interface -> name, ip -> name); | |
1600 | } | |
1601 | share = subnet -> shared_network; | |
1602 | if (ip -> shared_network && | |
1603 | ip -> shared_network != share) { | |
1604 | log_fatal ("Interface %s matches multiple shared %s", | |
1605 | ip -> name, "networks"); | |
1606 | } else { | |
1607 | if (!ip -> shared_network) | |
1608 | shared_network_reference | |
1609 | (&ip -> shared_network, share, MDL); | |
1610 | } | |
905c58b9 | 1611 | |
20916cae TL |
1612 | if (!share -> interface) { |
1613 | interface_reference (&share -> interface, ip, MDL); | |
1614 | } else if (share -> interface != ip) { | |
905c58b9 | 1615 | log_error ("Multiple interfaces match the %s: %s %s", |
20916cae TL |
1616 | "same shared network", |
1617 | share -> interface -> name, ip -> name); | |
1618 | } | |
d758ad8c | 1619 | subnet_dereference (&subnet, MDL); |
20916cae TL |
1620 | } |
1621 | return 1; | |
1622 | } | |
d758ad8c TL |
1623 | |
1624 | static TIME shutdown_time; | |
1625 | static int omapi_connection_count; | |
1626 | enum dhcp_shutdown_state shutdown_state; | |
1627 | ||
1628 | isc_result_t dhcp_io_shutdown (omapi_object_t *obj, void *foo) | |
1629 | { | |
1630 | /* Shut down all listeners. */ | |
1631 | if (shutdown_state == shutdown_listeners && | |
1632 | obj -> type == omapi_type_listener && | |
1633 | obj -> inner && | |
1634 | obj -> inner -> type == omapi_type_protocol_listener) { | |
1635 | omapi_listener_destroy (obj, MDL); | |
1636 | return ISC_R_SUCCESS; | |
1637 | } | |
1638 | ||
1639 | /* Shut down all existing omapi connections. */ | |
1640 | if (obj -> type == omapi_type_connection && | |
1641 | obj -> inner && | |
1642 | obj -> inner -> type == omapi_type_protocol) { | |
1643 | if (shutdown_state == shutdown_drop_omapi_connections) { | |
1644 | omapi_disconnect (obj, 1); | |
1645 | } | |
1646 | omapi_connection_count++; | |
1647 | if (shutdown_state == shutdown_omapi_connections) { | |
1648 | omapi_disconnect (obj, 0); | |
1649 | return ISC_R_SUCCESS; | |
1650 | } | |
1651 | } | |
1652 | ||
1653 | /* Shutdown all DHCP interfaces. */ | |
1654 | if (obj -> type == dhcp_type_interface && | |
1655 | shutdown_state == shutdown_dhcp) { | |
1656 | dhcp_interface_remove (obj, (omapi_object_t *)0); | |
1657 | return ISC_R_SUCCESS; | |
1658 | } | |
1659 | return ISC_R_SUCCESS; | |
1660 | } | |
1661 | ||
1662 | static isc_result_t dhcp_io_shutdown_countdown (void *vlp) | |
1663 | { | |
d758ad8c | 1664 | #if defined (FAILOVER_PROTOCOL) |
66cebfcb | 1665 | dhcp_failover_state_t *state; |
d758ad8c TL |
1666 | int failover_connection_count = 0; |
1667 | #endif | |
be62cf06 | 1668 | struct timeval tv; |
d758ad8c TL |
1669 | |
1670 | oncemore: | |
1671 | if (shutdown_state == shutdown_listeners || | |
1672 | shutdown_state == shutdown_omapi_connections || | |
1673 | shutdown_state == shutdown_drop_omapi_connections || | |
1674 | shutdown_state == shutdown_dhcp) { | |
1675 | omapi_connection_count = 0; | |
1676 | omapi_io_state_foreach (dhcp_io_shutdown, 0); | |
1677 | } | |
1678 | ||
1679 | if ((shutdown_state == shutdown_listeners || | |
1680 | shutdown_state == shutdown_omapi_connections || | |
1681 | shutdown_state == shutdown_drop_omapi_connections) && | |
1682 | omapi_connection_count == 0) { | |
1683 | shutdown_state = shutdown_dhcp; | |
1684 | shutdown_time = cur_time; | |
1685 | goto oncemore; | |
1686 | } else if (shutdown_state == shutdown_listeners && | |
1687 | cur_time - shutdown_time > 4) { | |
1688 | shutdown_state = shutdown_omapi_connections; | |
1689 | shutdown_time = cur_time; | |
1690 | } else if (shutdown_state == shutdown_omapi_connections && | |
1691 | cur_time - shutdown_time > 4) { | |
1692 | shutdown_state = shutdown_drop_omapi_connections; | |
1693 | shutdown_time = cur_time; | |
1694 | } else if (shutdown_state == shutdown_drop_omapi_connections && | |
1695 | cur_time - shutdown_time > 4) { | |
1696 | shutdown_state = shutdown_dhcp; | |
1697 | shutdown_time = cur_time; | |
1698 | goto oncemore; | |
1699 | } else if (shutdown_state == shutdown_dhcp && | |
1700 | cur_time - shutdown_time > 4) { | |
1701 | shutdown_state = shutdown_done; | |
1702 | shutdown_time = cur_time; | |
1703 | } | |
1704 | ||
1705 | #if defined (FAILOVER_PROTOCOL) | |
1706 | /* Set all failover peers into the shutdown state. */ | |
1707 | if (shutdown_state == shutdown_dhcp) { | |
1708 | for (state = failover_states; state; state = state -> next) { | |
1709 | if (state -> me.state == normal) { | |
1710 | dhcp_failover_set_state (state, shut_down); | |
1711 | failover_connection_count++; | |
1712 | } | |
1713 | if (state -> me.state == shut_down && | |
1714 | state -> partner.state != partner_down) | |
1715 | failover_connection_count++; | |
1716 | } | |
1717 | } | |
1718 | ||
1719 | if (shutdown_state == shutdown_done) { | |
1720 | for (state = failover_states; state; state = state -> next) { | |
1721 | if (state -> me.state == shut_down) { | |
1722 | if (state -> link_to_peer) | |
1723 | dhcp_failover_link_dereference (&state -> link_to_peer, | |
1724 | MDL); | |
1725 | dhcp_failover_set_state (state, recover); | |
1726 | } | |
1727 | } | |
98311e4b | 1728 | #if defined (DEBUG_MEMORY_LEAKAGE) && \ |
d758ad8c TL |
1729 | defined (DEBUG_MEMORY_LEAKAGE_ON_EXIT) |
1730 | free_everything (); | |
1731 | omapi_print_dmalloc_usage_by_caller (); | |
1732 | #endif | |
f950de77 SR |
1733 | if (no_pid_file == ISC_FALSE) |
1734 | (void) unlink(path_dhcpd_pid); | |
d758ad8c | 1735 | exit (0); |
905c58b9 | 1736 | } |
d758ad8c TL |
1737 | #else |
1738 | if (shutdown_state == shutdown_done) { | |
98311e4b DH |
1739 | #if defined (DEBUG_MEMORY_LEAKAGE) && \ |
1740 | defined (DEBUG_MEMORY_LEAKAGE_ON_EXIT) | |
1741 | free_everything (); | |
905c58b9 | 1742 | omapi_print_dmalloc_usage_by_caller (); |
d758ad8c | 1743 | #endif |
f950de77 SR |
1744 | if (no_pid_file == ISC_FALSE) |
1745 | (void) unlink(path_dhcpd_pid); | |
d758ad8c TL |
1746 | exit (0); |
1747 | } | |
1748 | #endif | |
1749 | if (shutdown_state == shutdown_dhcp && | |
33e1cb2b DH |
1750 | #if defined(FAILOVER_PROTOCOL) |
1751 | !failover_connection_count && | |
1752 | #endif | |
1753 | ISC_TRUE) { | |
d758ad8c TL |
1754 | shutdown_state = shutdown_done; |
1755 | shutdown_time = cur_time; | |
1756 | goto oncemore; | |
1757 | } | |
be62cf06 FD |
1758 | tv.tv_sec = cur_tv.tv_sec + 1; |
1759 | tv.tv_usec = cur_tv.tv_usec; | |
1760 | add_timeout (&tv, | |
d758ad8c TL |
1761 | (void (*)(void *))dhcp_io_shutdown_countdown, 0, 0, 0); |
1762 | return ISC_R_SUCCESS; | |
1763 | } | |
1764 | ||
1765 | isc_result_t dhcp_set_control_state (control_object_state_t oldstate, | |
1766 | control_object_state_t newstate) | |
1767 | { | |
0895c955 SR |
1768 | struct timeval tv; |
1769 | ||
1770 | if (newstate != server_shutdown) | |
1771 | return DHCP_R_INVALIDARG; | |
1772 | /* Re-entry. */ | |
1773 | if (shutdown_signal == SIGUSR1) | |
1774 | return ISC_R_SUCCESS; | |
1775 | shutdown_time = cur_time; | |
1776 | shutdown_state = shutdown_listeners; | |
1777 | /* Called by user. */ | |
1778 | if (shutdown_signal == 0) { | |
1779 | shutdown_signal = SIGUSR1; | |
d758ad8c TL |
1780 | dhcp_io_shutdown_countdown (0); |
1781 | return ISC_R_SUCCESS; | |
1782 | } | |
0895c955 SR |
1783 | /* Called on signal. */ |
1784 | log_info("Received signal %d, initiating shutdown.", shutdown_signal); | |
1785 | shutdown_signal = SIGUSR1; | |
905c58b9 | 1786 | |
0895c955 SR |
1787 | /* |
1788 | * Prompt the shutdown event onto the timer queue | |
1789 | * and return to the dispatch loop. | |
1790 | */ | |
1791 | tv.tv_sec = cur_tv.tv_sec; | |
1792 | tv.tv_usec = cur_tv.tv_usec + 1; | |
1793 | add_timeout(&tv, | |
1794 | (void (*)(void *))dhcp_io_shutdown_countdown, 0, 0, 0); | |
1795 | return ISC_R_SUCCESS; | |
d758ad8c | 1796 | } |