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61744359 | 1 | /* dnsmasq is Copyright (c) 2000-2013 Simon Kelley |
824af85b | 2 | |
9e4abcb5 SK |
3 | This program is free software; you can redistribute it and/or modify |
4 | it under the terms of the GNU General Public License as published by | |
824af85b SK |
5 | the Free Software Foundation; version 2 dated June, 1991, or |
6 | (at your option) version 3 dated 29 June, 2007. | |
7 | ||
9e4abcb5 SK |
8 | This program is distributed in the hope that it will be useful, |
9 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | GNU General Public License for more details. | |
824af85b | 12 | |
73a08a24 SK |
13 | You should have received a copy of the GNU General Public License |
14 | along with this program. If not, see <http://www.gnu.org/licenses/>. | |
9e4abcb5 SK |
15 | */ |
16 | ||
61744359 | 17 | #define COPYRIGHT "Copyright (c) 2000-2013 Simon Kelley" |
9e4abcb5 | 18 | |
1a6bca81 | 19 | #ifndef NO_LARGEFILE |
9e038946 | 20 | /* Ensure we can use files >2GB (log files may grow this big) */ |
1a6bca81 SK |
21 | # define _LARGEFILE_SOURCE 1 |
22 | # define _FILE_OFFSET_BITS 64 | |
23 | #endif | |
9e038946 | 24 | |
8ef5ada2 SK |
25 | /* Get linux C library versions and define _GNU_SOURCE for kFreeBSD. */ |
26 | #if defined(__linux__) || defined(__GLIBC__) | |
572b41eb SK |
27 | # ifndef __ANDROID__ |
28 | # define _GNU_SOURCE | |
29 | # endif | |
9e038946 SK |
30 | # include <features.h> |
31 | #endif | |
32 | ||
316e2730 SK |
33 | /* Need these defined early */ |
34 | #if defined(__sun) || defined(__sun__) | |
35 | # define _XPG4_2 | |
36 | # define __EXTENSIONS__ | |
37 | #endif | |
38 | ||
9e4abcb5 | 39 | /* get these before config.h for IPv6 stuff... */ |
44a2a316 | 40 | #include <sys/types.h> |
1f15b81d | 41 | #include <sys/socket.h> |
c72daea8 SK |
42 | |
43 | #ifdef __APPLE__ | |
44 | /* Define before netinet/in.h to select API. OSX Lion onwards. */ | |
45 | # define __APPLE_USE_RFC_3542 | |
46 | #endif | |
9e4abcb5 SK |
47 | #include <netinet/in.h> |
48 | ||
c72daea8 | 49 | /* Also needed before config.h. */ |
59353a6b SK |
50 | #include <getopt.h> |
51 | ||
9e4abcb5 | 52 | #include "config.h" |
b8187c80 | 53 | |
572b41eb SK |
54 | typedef unsigned char u8; |
55 | typedef unsigned short u16; | |
56 | typedef unsigned int u32; | |
52b92f4d | 57 | typedef unsigned long long u64; |
572b41eb | 58 | |
c239f7de SK |
59 | #include "dns-protocol.h" |
60 | #include "dhcp-protocol.h" | |
c72daea8 | 61 | #ifdef HAVE_DHCP6 |
c239f7de SK |
62 | #include "dhcp6-protocol.h" |
63 | #include "radv-protocol.h" | |
c72daea8 | 64 | #endif |
572b41eb | 65 | |
b8187c80 | 66 | #define gettext_noop(S) (S) |
824af85b | 67 | #ifndef LOCALEDIR |
b8187c80 SK |
68 | # define _(S) (S) |
69 | #else | |
70 | # include <libintl.h> | |
71 | # include <locale.h> | |
72 | # define _(S) gettext(S) | |
73 | #endif | |
74 | ||
9e4abcb5 SK |
75 | #include <arpa/inet.h> |
76 | #include <sys/stat.h> | |
9e4abcb5 | 77 | #include <sys/ioctl.h> |
824af85b | 78 | #if defined(HAVE_SOLARIS_NETWORK) |
316e2730 | 79 | # include <sys/sockio.h> |
824af85b | 80 | #endif |
9e4abcb5 | 81 | #include <sys/select.h> |
feba5c1d | 82 | #include <sys/wait.h> |
9e4abcb5 | 83 | #include <sys/time.h> |
f2621c7f | 84 | #include <sys/un.h> |
8a911ccc | 85 | #include <limits.h> |
9e4abcb5 | 86 | #include <net/if.h> |
316e2730 SK |
87 | #if defined(HAVE_SOLARIS_NETWORK) && !defined(ifr_mtu) |
88 | /* Some solaris net/if./h omit this. */ | |
89 | # define ifr_mtu ifr_ifru.ifru_metric | |
90 | #endif | |
9e4abcb5 SK |
91 | #include <unistd.h> |
92 | #include <stdio.h> | |
93 | #include <string.h> | |
94 | #include <stdlib.h> | |
95 | #include <fcntl.h> | |
96 | #include <ctype.h> | |
97 | #include <signal.h> | |
9e038946 | 98 | #include <stddef.h> |
9e4abcb5 SK |
99 | #include <time.h> |
100 | #include <errno.h> | |
101 | #include <pwd.h> | |
102 | #include <grp.h> | |
f6b7dc47 | 103 | #include <stdarg.h> |
572b41eb | 104 | #if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__sun__) || defined (__sun) || defined (__ANDROID__) |
44a2a316 SK |
105 | # include <netinet/if_ether.h> |
106 | #else | |
107 | # include <net/ethernet.h> | |
108 | #endif | |
9e4abcb5 SK |
109 | #include <net/if_arp.h> |
110 | #include <netinet/in_systm.h> | |
111 | #include <netinet/ip.h> | |
3be34541 | 112 | #include <netinet/ip_icmp.h> |
5e9e0efb | 113 | #include <sys/uio.h> |
849a8357 SK |
114 | #include <syslog.h> |
115 | #include <dirent.h> | |
5e9e0efb | 116 | #ifndef HAVE_LINUX_NETWORK |
44a2a316 | 117 | # include <net/if_dl.h> |
9e4abcb5 | 118 | #endif |
5e9e0efb | 119 | |
824af85b | 120 | #if defined(HAVE_LINUX_NETWORK) |
5e9e0efb SK |
121 | #include <linux/capability.h> |
122 | /* There doesn't seem to be a universally-available | |
9e038946 | 123 | userpace header for these. */ |
5e9e0efb | 124 | extern int capset(cap_user_header_t header, cap_user_data_t data); |
9e038946 SK |
125 | extern int capget(cap_user_header_t header, cap_user_data_t data); |
126 | #define LINUX_CAPABILITY_VERSION_1 0x19980330 | |
127 | #define LINUX_CAPABILITY_VERSION_2 0x20071026 | |
1a6bca81 | 128 | #define LINUX_CAPABILITY_VERSION_3 0x20080522 |
9e038946 | 129 | |
5e9e0efb | 130 | #include <sys/prctl.h> |
7622fc06 | 131 | #elif defined(HAVE_SOLARIS_NETWORK) |
824af85b | 132 | #include <priv.h> |
5e9e0efb | 133 | #endif |
9e4abcb5 | 134 | |
824af85b | 135 | /* daemon is function in the C library.... */ |
5aabfc78 SK |
136 | #define daemon dnsmasq_daemon |
137 | ||
138 | /* Async event queue */ | |
139 | struct event_desc { | |
c72daea8 | 140 | int event, data, msg_sz; |
5aabfc78 SK |
141 | }; |
142 | ||
143 | #define EVENT_RELOAD 1 | |
144 | #define EVENT_DUMP 2 | |
145 | #define EVENT_ALARM 3 | |
146 | #define EVENT_TERM 4 | |
147 | #define EVENT_CHILD 5 | |
148 | #define EVENT_REOPEN 6 | |
149 | #define EVENT_EXITED 7 | |
150 | #define EVENT_KILLED 8 | |
151 | #define EVENT_EXEC_ERR 9 | |
152 | #define EVENT_PIPE_ERR 10 | |
9e038946 | 153 | #define EVENT_USER_ERR 11 |
1a6bca81 SK |
154 | #define EVENT_CAP_ERR 12 |
155 | #define EVENT_PIDFILE 13 | |
156 | #define EVENT_HUSER_ERR 14 | |
157 | #define EVENT_GROUP_ERR 15 | |
158 | #define EVENT_DIE 16 | |
159 | #define EVENT_LOG_ERR 17 | |
7622fc06 | 160 | #define EVENT_FORK_ERR 18 |
c72daea8 | 161 | #define EVENT_LUA_ERR 19 |
8b3ae2fd | 162 | #define EVENT_TFTP_ERR 20 |
5aabfc78 SK |
163 | |
164 | /* Exit codes. */ | |
165 | #define EC_GOOD 0 | |
166 | #define EC_BADCONF 1 | |
167 | #define EC_BADNET 2 | |
168 | #define EC_FILE 3 | |
169 | #define EC_NOMEM 4 | |
170 | #define EC_MISC 5 | |
171 | #define EC_INIT_OFFSET 10 | |
172 | ||
0a852541 SK |
173 | /* Min buffer size: we check after adding each record, so there must be |
174 | memory for the largest packet, and the largest record so the | |
175 | min for DNS is PACKETSZ+MAXDNAME+RRFIXEDSZ which is < 1000. | |
176 | This might be increased is EDNS packet size if greater than the minimum. | |
cdeda28f SK |
177 | */ |
178 | #define DNSMASQ_PACKETSZ PACKETSZ+MAXDNAME+RRFIXEDSZ | |
44a2a316 | 179 | |
572b41eb | 180 | /* Trust the compiler dead-code eliminator.... */ |
28866e95 SK |
181 | #define option_bool(x) (((x) < 32) ? daemon->options & (1u << (x)) : daemon->options2 & (1u << ((x) - 32))) |
182 | ||
183 | #define OPT_BOGUSPRIV 0 | |
184 | #define OPT_FILTER 1 | |
185 | #define OPT_LOG 2 | |
186 | #define OPT_SELFMX 3 | |
187 | #define OPT_NO_HOSTS 4 | |
188 | #define OPT_NO_POLL 5 | |
189 | #define OPT_DEBUG 6 | |
190 | #define OPT_ORDER 7 | |
191 | #define OPT_NO_RESOLV 8 | |
192 | #define OPT_EXPAND 9 | |
193 | #define OPT_LOCALMX 10 | |
194 | #define OPT_NO_NEG 11 | |
195 | #define OPT_NODOTS_LOCAL 12 | |
196 | #define OPT_NOWILD 13 | |
197 | #define OPT_ETHERS 14 | |
198 | #define OPT_RESOLV_DOMAIN 15 | |
199 | #define OPT_NO_FORK 16 | |
200 | #define OPT_AUTHORITATIVE 17 | |
201 | #define OPT_LOCALISE 18 | |
202 | #define OPT_DBUS 19 | |
203 | #define OPT_DHCP_FQDN 20 | |
204 | #define OPT_NO_PING 21 | |
205 | #define OPT_LEASE_RO 22 | |
206 | #define OPT_ALL_SERVERS 23 | |
207 | #define OPT_RELOAD 24 | |
208 | #define OPT_LOCAL_REBIND 25 | |
209 | #define OPT_TFTP_SECURE 26 | |
210 | #define OPT_TFTP_NOBLOCK 27 | |
211 | #define OPT_LOG_OPTS 28 | |
212 | #define OPT_TFTP_APREF 29 | |
213 | #define OPT_NO_OVERRIDE 30 | |
214 | #define OPT_NO_REBIND 31 | |
215 | #define OPT_ADD_MAC 32 | |
216 | #define OPT_DNSSEC 33 | |
7de060b0 SK |
217 | #define OPT_CONSEC_ADDR 34 |
218 | #define OPT_CONNTRACK 35 | |
c72daea8 | 219 | #define OPT_FQDN_UPDATE 36 |
c5ad4e79 | 220 | #define OPT_RA 37 |
61ce600b | 221 | #define OPT_TFTP_LC 38 |
54dd393f | 222 | #define OPT_CLEVERBIND 39 |
8bc4cece SK |
223 | #define OPT_TFTP 40 |
224 | #define OPT_LAST 41 | |
9e4abcb5 | 225 | |
7622fc06 SK |
226 | /* extra flags for my_syslog, we use a couple of facilities since they are known |
227 | not to occupy the same bits as priorities, no matter how syslog.h is set up. */ | |
228 | #define MS_TFTP LOG_USER | |
229 | #define MS_DHCP LOG_DAEMON | |
230 | ||
9e4abcb5 SK |
231 | struct all_addr { |
232 | union { | |
233 | struct in_addr addr4; | |
234 | #ifdef HAVE_IPV6 | |
235 | struct in6_addr addr6; | |
236 | #endif | |
237 | } addr; | |
238 | }; | |
239 | ||
240 | struct bogus_addr { | |
241 | struct in_addr addr; | |
242 | struct bogus_addr *next; | |
243 | }; | |
244 | ||
1cff166d SK |
245 | /* dns doctor param */ |
246 | struct doctor { | |
73a08a24 | 247 | struct in_addr in, end, out, mask; |
1cff166d SK |
248 | struct doctor *next; |
249 | }; | |
250 | ||
0a852541 SK |
251 | struct mx_srv_record { |
252 | char *name, *target; | |
3d8df260 SK |
253 | int issrv, srvport, priority, weight; |
254 | unsigned int offset; | |
0a852541 | 255 | struct mx_srv_record *next; |
de37951c SK |
256 | }; |
257 | ||
1a6bca81 SK |
258 | struct naptr { |
259 | char *name, *replace, *regexp, *services, *flags; | |
260 | unsigned int order, pref; | |
261 | struct naptr *next; | |
262 | }; | |
263 | ||
0a852541 | 264 | struct txt_record { |
28866e95 SK |
265 | char *name; |
266 | unsigned char *txt; | |
0a852541 SK |
267 | unsigned short class, len; |
268 | struct txt_record *next; | |
f6b7dc47 SK |
269 | }; |
270 | ||
832af0ba SK |
271 | struct ptr_record { |
272 | char *name, *ptr; | |
273 | struct ptr_record *next; | |
274 | }; | |
275 | ||
9009d746 SK |
276 | struct cname { |
277 | char *alias, *target; | |
278 | struct cname *next; | |
279 | }; | |
280 | ||
4f7b304f SK |
281 | struct auth_zone { |
282 | char *domain; | |
283 | struct subnet { | |
284 | int is6, prefixlen; | |
285 | struct in_addr addr4; | |
286 | #ifdef HAVE_IPV6 | |
287 | struct in6_addr addr6; | |
288 | #endif | |
289 | struct subnet *next; | |
290 | } *subnet; | |
291 | struct auth_zone *next; | |
292 | }; | |
293 | ||
294 | ||
e759d426 SK |
295 | struct host_record { |
296 | struct name_list { | |
297 | char *name; | |
298 | struct name_list *next; | |
299 | } *names; | |
300 | struct in_addr addr; | |
301 | #ifdef HAVE_IPV6 | |
302 | struct in6_addr addr6; | |
303 | #endif | |
304 | struct host_record *next; | |
305 | }; | |
306 | ||
f2621c7f SK |
307 | struct interface_name { |
308 | char *name; /* domain name */ | |
309 | char *intr; /* interface name */ | |
115ac3e4 SK |
310 | struct addrlist { |
311 | struct all_addr addr; | |
312 | struct addrlist *next; | |
313 | } *addr4; | |
314 | #ifdef HAVE_IPV6 | |
315 | struct addrlist *addr6; | |
316 | #endif | |
f2621c7f SK |
317 | struct interface_name *next; |
318 | }; | |
319 | ||
9e4abcb5 SK |
320 | union bigname { |
321 | char name[MAXDNAME]; | |
322 | union bigname *next; /* freelist */ | |
323 | }; | |
324 | ||
7b4ad2eb SK |
325 | struct keydata { |
326 | struct keydata *next; | |
327 | unsigned char key[KEYBLOCK_LEN]; | |
328 | }; | |
329 | ||
9e4abcb5 SK |
330 | struct crec { |
331 | struct crec *next, *prev, *hash_next; | |
cdbee9a4 | 332 | /* union is 16 bytes when doing IPv6, 8 bytes on 32 bit machines without IPv6 */ |
fd9fa481 SK |
333 | union { |
334 | struct all_addr addr; | |
335 | struct { | |
336 | struct crec *cache; | |
337 | int uid; | |
338 | } cname; | |
7b4ad2eb SK |
339 | struct { |
340 | struct keydata *keydata; | |
341 | unsigned char algo; | |
cdbee9a4 SK |
342 | unsigned char digest; /* DS only */ |
343 | unsigned short flags_or_keyid; /* flags for DNSKEY, keyid for DS */ | |
7b4ad2eb | 344 | } key; |
fd9fa481 | 345 | } addr; |
cdbee9a4 SK |
346 | time_t ttd; /* time to die */ |
347 | /* used as keylen if F_DS or F_DNSKEY, index to source for F_HOSTS */ | |
348 | int uid; | |
9e4abcb5 SK |
349 | unsigned short flags; |
350 | union { | |
351 | char sname[SMALLDNAME]; | |
352 | union bigname *bname; | |
353 | char *namep; | |
354 | } name; | |
355 | }; | |
356 | ||
28866e95 SK |
357 | #define F_IMMORTAL (1u<<0) |
358 | #define F_NAMEP (1u<<1) | |
359 | #define F_REVERSE (1u<<2) | |
360 | #define F_FORWARD (1u<<3) | |
361 | #define F_DHCP (1u<<4) | |
362 | #define F_NEG (1u<<5) | |
363 | #define F_HOSTS (1u<<6) | |
364 | #define F_IPV4 (1u<<7) | |
365 | #define F_IPV6 (1u<<8) | |
366 | #define F_BIGNAME (1u<<9) | |
367 | #define F_NXDOMAIN (1u<<10) | |
368 | #define F_CNAME (1u<<11) | |
7b4ad2eb | 369 | #define F_DNSKEY (1u<<12) |
28866e95 | 370 | #define F_CONFIG (1u<<13) |
7b4ad2eb SK |
371 | #define F_DS (1u<<14) |
372 | #define F_DNSSECOK (1u<<15) | |
373 | ||
28866e95 SK |
374 | /* below here are only valid as args to log_query: cache |
375 | entries are limited to 16 bits */ | |
376 | #define F_UPSTREAM (1u<<16) | |
377 | #define F_RRNAME (1u<<17) | |
378 | #define F_SERVER (1u<<18) | |
379 | #define F_QUERY (1u<<19) | |
7b4ad2eb | 380 | #define F_NOERR (1u<<20) |
4f7b304f SK |
381 | #define F_AUTH (1u<<21) |
382 | ||
7b4ad2eb SK |
383 | /* composites */ |
384 | #define F_TYPE (F_IPV4 | F_IPV6 | F_DNSKEY | F_DS) /* Only one may be set */ | |
385 | ||
28866e95 | 386 | |
9e4abcb5 SK |
387 | |
388 | /* struct sockaddr is not large enough to hold any address, | |
cdeda28f | 389 | and specifically not big enough to hold an IPv6 address. |
9e4abcb5 SK |
390 | Blech. Roll our own. */ |
391 | union mysockaddr { | |
392 | struct sockaddr sa; | |
393 | struct sockaddr_in in; | |
7622fc06 | 394 | #if defined(HAVE_IPV6) |
9e4abcb5 SK |
395 | struct sockaddr_in6 in6; |
396 | #endif | |
397 | }; | |
398 | ||
bad7b875 SK |
399 | /* bits in flag param to IPv6 callbacks from iface_enumerate() */ |
400 | #define IFACE_TENTATIVE 1 | |
401 | #define IFACE_DEPRECATED 2 | |
402 | ||
403 | ||
0a852541 SK |
404 | #define SERV_FROM_RESOLV 1 /* 1 for servers from resolv, 0 for command line. */ |
405 | #define SERV_NO_ADDR 2 /* no server, this domain is local only */ | |
406 | #define SERV_LITERAL_ADDRESS 4 /* addr is the answer, not the server */ | |
5aabfc78 SK |
407 | #define SERV_HAS_DOMAIN 8 /* server for one domain only */ |
408 | #define SERV_HAS_SOURCE 16 /* source address defined */ | |
0a852541 SK |
409 | #define SERV_FOR_NODOTS 32 /* server for names with no domain part only */ |
410 | #define SERV_WARNED_RECURSIVE 64 /* avoid warning spam */ | |
3d8df260 SK |
411 | #define SERV_FROM_DBUS 128 /* 1 if source is DBus */ |
412 | #define SERV_MARK 256 /* for mark-and-delete */ | |
9e4abcb5 | 413 | #define SERV_TYPE (SERV_HAS_DOMAIN | SERV_FOR_NODOTS) |
824af85b | 414 | #define SERV_COUNTED 512 /* workspace for log code */ |
8ef5ada2 SK |
415 | #define SERV_USE_RESOLV 1024 /* forward this domain in the normal way */ |
416 | #define SERV_NO_REBIND 2048 /* inhibit dns-rebind protection */ | |
9e4abcb5 SK |
417 | |
418 | struct serverfd { | |
419 | int fd; | |
420 | union mysockaddr source_addr; | |
824af85b | 421 | char interface[IF_NAMESIZE+1]; |
9e4abcb5 SK |
422 | struct serverfd *next; |
423 | }; | |
424 | ||
1a6bca81 SK |
425 | struct randfd { |
426 | int fd; | |
427 | unsigned short refcount, family; | |
428 | }; | |
429 | ||
9e4abcb5 SK |
430 | struct server { |
431 | union mysockaddr addr, source_addr; | |
824af85b | 432 | char interface[IF_NAMESIZE+1]; |
1697269c | 433 | struct serverfd *sfd; |
9e4abcb5 | 434 | char *domain; /* set if this server only handles a domain. */ |
feba5c1d | 435 | int flags, tcpfd; |
824af85b | 436 | unsigned int queries, failed_queries; |
9e4abcb5 SK |
437 | struct server *next; |
438 | }; | |
439 | ||
13d86c73 JD |
440 | struct ipsets { |
441 | char **sets; | |
442 | char *domain; | |
443 | struct ipsets *next; | |
444 | }; | |
445 | ||
9e4abcb5 SK |
446 | struct irec { |
447 | union mysockaddr addr; | |
f6b7dc47 | 448 | struct in_addr netmask; /* only valid for IPv4 */ |
5d162f20 SK |
449 | int tftp_ok, dhcp_ok, mtu, done, dad, dns_auth, index, multicast_done; |
450 | char *name; | |
9e4abcb5 SK |
451 | struct irec *next; |
452 | }; | |
453 | ||
44a2a316 | 454 | struct listener { |
832af0ba | 455 | int fd, tcpfd, tftpfd, family; |
52d4abf2 | 456 | struct irec *iface; /* only sometimes valid for non-wildcard */ |
44a2a316 SK |
457 | struct listener *next; |
458 | }; | |
459 | ||
9e4abcb5 SK |
460 | /* interface and address parms from command line. */ |
461 | struct iname { | |
462 | char *name; | |
463 | union mysockaddr addr; | |
4ce4f377 | 464 | int used; |
9e4abcb5 SK |
465 | struct iname *next; |
466 | }; | |
467 | ||
468 | /* resolv-file parms from command-line */ | |
469 | struct resolvc { | |
470 | struct resolvc *next; | |
3d8df260 SK |
471 | int is_default, logged; |
472 | time_t mtime; | |
9e4abcb5 SK |
473 | char *name; |
474 | }; | |
475 | ||
28866e95 | 476 | /* adn-hosts parms from command-line (also dhcp-hostsfile and dhcp-optsfile */ |
7622fc06 SK |
477 | #define AH_DIR 1 |
478 | #define AH_INACTIVE 2 | |
fd9fa481 SK |
479 | struct hostsfile { |
480 | struct hostsfile *next; | |
7622fc06 | 481 | int flags; |
fd9fa481 | 482 | char *fname; |
cdeda28f | 483 | int index; /* matches to cache entries for logging */ |
fd9fa481 SK |
484 | }; |
485 | ||
28866e95 SK |
486 | #define FREC_NOREBIND 1 |
487 | #define FREC_CHECKING_DISABLED 2 | |
488 | ||
9e4abcb5 SK |
489 | struct frec { |
490 | union mysockaddr source; | |
44a2a316 | 491 | struct all_addr dest; |
832af0ba | 492 | struct server *sentto; /* NULL means free */ |
1a6bca81 SK |
493 | struct randfd *rfd4; |
494 | #ifdef HAVE_IPV6 | |
495 | struct randfd *rfd6; | |
496 | #endif | |
dfa666f2 | 497 | unsigned int iface; |
9e4abcb5 | 498 | unsigned short orig_id, new_id; |
28866e95 | 499 | int fd, forwardall, flags; |
fd9fa481 | 500 | unsigned int crc; |
9e4abcb5 SK |
501 | time_t time; |
502 | struct frec *next; | |
503 | }; | |
504 | ||
40ef23b5 SK |
505 | /* flags in top of length field for DHCP-option tables */ |
506 | #define OT_ADDR_LIST 0x8000 | |
507 | #define OT_RFC1035_NAME 0x4000 | |
508 | #define OT_INTERNAL 0x2000 | |
509 | #define OT_NAME 0x1000 | |
510 | #define OT_CSTRING 0x0800 | |
511 | #define OT_DEC 0x0400 | |
23245c0c | 512 | #define OT_TIME 0x0200 |
40ef23b5 | 513 | |
1697269c SK |
514 | /* actions in the daemon->helper RPC */ |
515 | #define ACTION_DEL 1 | |
516 | #define ACTION_OLD_HOSTNAME 2 | |
517 | #define ACTION_OLD 3 | |
518 | #define ACTION_ADD 4 | |
a9530964 | 519 | #define ACTION_TFTP 5 |
1697269c | 520 | |
4cb1b320 SK |
521 | #define LEASE_NEW 1 /* newly created */ |
522 | #define LEASE_CHANGED 2 /* modified */ | |
523 | #define LEASE_AUX_CHANGED 4 /* CLID or expiry changed */ | |
524 | #define LEASE_AUTH_NAME 8 /* hostname came from config, not from client */ | |
525 | #define LEASE_USED 16 /* used this DHCPv6 transaction */ | |
526 | #define LEASE_NA 32 /* IPv6 no-temporary lease */ | |
527 | #define LEASE_TA 64 /* IPv6 temporary lease */ | |
353ae4d2 | 528 | #define LEASE_HAVE_HWADDR 128 /* Have set hwaddress */ |
4cb1b320 | 529 | |
9e4abcb5 SK |
530 | struct dhcp_lease { |
531 | int clid_len; /* length of client identifier */ | |
532 | unsigned char *clid; /* clientid */ | |
533 | char *hostname, *fqdn; /* name from client-hostname option or config */ | |
1697269c | 534 | char *old_hostname; /* hostname before it moved to another lease */ |
4cb1b320 | 535 | int flags; |
9e4abcb5 | 536 | time_t expires; /* lease expiry */ |
5e9e0efb SK |
537 | #ifdef HAVE_BROKEN_RTC |
538 | unsigned int length; | |
539 | #endif | |
52b92f4d SK |
540 | int hwaddr_len, hwaddr_type; /* hw_type used for iaid in v6 */ |
541 | unsigned char hwaddr[DHCP_CHADDR_MAX]; /* also IPv6 address */ | |
1f15b81d | 542 | struct in_addr addr, override, giaddr; |
316e2730 SK |
543 | unsigned char *extradata; |
544 | unsigned int extradata_len, extradata_size; | |
824af85b | 545 | int last_interface; |
353ae4d2 SK |
546 | #ifdef HAVE_DHCP6 |
547 | struct slaac_address { | |
548 | struct in6_addr addr, local; | |
549 | time_t ping_time; | |
550 | int backoff; /* zero -> confirmed */ | |
551 | struct slaac_address *next; | |
552 | } *slaac_address; | |
6f9aaa93 | 553 | int vendorclass_count; |
353ae4d2 | 554 | #endif |
9e4abcb5 SK |
555 | struct dhcp_lease *next; |
556 | }; | |
557 | ||
a222641c SK |
558 | struct dhcp_netid { |
559 | char *net; | |
560 | struct dhcp_netid *next; | |
561 | }; | |
562 | ||
26128d27 SK |
563 | struct dhcp_netid_list { |
564 | struct dhcp_netid *list; | |
565 | struct dhcp_netid_list *next; | |
566 | }; | |
1697269c | 567 | |
8ef5ada2 SK |
568 | struct tag_if { |
569 | struct dhcp_netid_list *set; | |
570 | struct dhcp_netid *tag; | |
571 | struct tag_if *next; | |
572 | }; | |
573 | ||
9009d746 SK |
574 | struct hwaddr_config { |
575 | int hwaddr_len, hwaddr_type; | |
576 | unsigned char hwaddr[DHCP_CHADDR_MAX]; | |
577 | unsigned int wildcard_mask; | |
578 | struct hwaddr_config *next; | |
579 | }; | |
580 | ||
9e4abcb5 | 581 | struct dhcp_config { |
33820b7e | 582 | unsigned int flags; |
9e4abcb5 SK |
583 | int clid_len; /* length of client identifier */ |
584 | unsigned char *clid; /* clientid */ | |
9009d746 | 585 | char *hostname, *domain; |
8ef5ada2 | 586 | struct dhcp_netid_list *netid; |
52b92f4d SK |
587 | #ifdef HAVE_DHCP6 |
588 | struct in6_addr addr6; | |
589 | #endif | |
9e4abcb5 | 590 | struct in_addr addr; |
849a8357 | 591 | time_t decline_time; |
9009d746 SK |
592 | unsigned int lease_time; |
593 | struct hwaddr_config *hwaddr; | |
9e4abcb5 SK |
594 | struct dhcp_config *next; |
595 | }; | |
596 | ||
4cb1b320 SK |
597 | #define have_config(config, mask) ((config) && ((config)->flags & (mask))) |
598 | ||
0a852541 SK |
599 | #define CONFIG_DISABLE 1 |
600 | #define CONFIG_CLID 2 | |
0a852541 SK |
601 | #define CONFIG_TIME 8 |
602 | #define CONFIG_NAME 16 | |
603 | #define CONFIG_ADDR 32 | |
0a852541 | 604 | #define CONFIG_NOCLID 128 |
849a8357 SK |
605 | #define CONFIG_FROM_ETHERS 256 /* entry created by /etc/ethers */ |
606 | #define CONFIG_ADDR_HOSTS 512 /* address added by from /etc/hosts */ | |
607 | #define CONFIG_DECLINED 1024 /* address declined by client */ | |
5aabfc78 | 608 | #define CONFIG_BANK 2048 /* from dhcp hosts file */ |
52b92f4d | 609 | #define CONFIG_ADDR6 4096 |
30393100 | 610 | #define CONFIG_WILDCARD 8192 |
33820b7e | 611 | |
9e4abcb5 | 612 | struct dhcp_opt { |
cdeda28f | 613 | int opt, len, flags; |
73a08a24 SK |
614 | union { |
615 | int encap; | |
616 | unsigned int wildcard_mask; | |
617 | unsigned char *vendor_class; | |
618 | } u; | |
619 | unsigned char *val; | |
26128d27 | 620 | struct dhcp_netid *netid; |
9e4abcb5 | 621 | struct dhcp_opt *next; |
a84fa1d0 SK |
622 | }; |
623 | ||
cdeda28f SK |
624 | #define DHOPT_ADDR 1 |
625 | #define DHOPT_STRING 2 | |
6b01084f | 626 | #define DHOPT_ENCAPSULATE 4 |
73a08a24 | 627 | #define DHOPT_ENCAP_MATCH 8 |
6b01084f | 628 | #define DHOPT_FORCE 16 |
824af85b | 629 | #define DHOPT_BANK 32 |
73a08a24 SK |
630 | #define DHOPT_ENCAP_DONE 64 |
631 | #define DHOPT_MATCH 128 | |
632 | #define DHOPT_VENDOR 256 | |
633 | #define DHOPT_HEX 512 | |
7622fc06 | 634 | #define DHOPT_VENDOR_MATCH 1024 |
316e2730 | 635 | #define DHOPT_RFC3925 2048 |
7de060b0 | 636 | #define DHOPT_TAGOK 4096 |
4cb1b320 | 637 | #define DHOPT_ADDR6 8192 |
cdeda28f | 638 | |
26128d27 | 639 | struct dhcp_boot { |
7de060b0 | 640 | char *file, *sname, *tftp_sname; |
26128d27 SK |
641 | struct in_addr next_server; |
642 | struct dhcp_netid *netid; | |
643 | struct dhcp_boot *next; | |
644 | }; | |
645 | ||
7622fc06 SK |
646 | struct pxe_service { |
647 | unsigned short CSA, type; | |
751d6f4a | 648 | char *menu, *basename, *sname; |
7622fc06 SK |
649 | struct in_addr server; |
650 | struct dhcp_netid *netid; | |
651 | struct pxe_service *next; | |
652 | }; | |
653 | ||
f2621c7f SK |
654 | #define MATCH_VENDOR 1 |
655 | #define MATCH_USER 2 | |
656 | #define MATCH_CIRCUIT 3 | |
657 | #define MATCH_REMOTE 4 | |
658 | #define MATCH_SUBSCRIBER 5 | |
659 | ||
660 | /* vendorclass, userclass, remote-id or cicuit-id */ | |
a84fa1d0 | 661 | struct dhcp_vendor { |
a5c72ab5 SK |
662 | int len, match_type; |
663 | unsigned int enterprise; | |
a222641c SK |
664 | char *data; |
665 | struct dhcp_netid netid; | |
a84fa1d0 SK |
666 | struct dhcp_vendor *next; |
667 | }; | |
9e4abcb5 | 668 | |
cdeda28f SK |
669 | struct dhcp_mac { |
670 | unsigned int mask; | |
671 | int hwaddr_len, hwaddr_type; | |
672 | unsigned char hwaddr[DHCP_CHADDR_MAX]; | |
673 | struct dhcp_netid netid; | |
674 | struct dhcp_mac *next; | |
675 | }; | |
676 | ||
832af0ba SK |
677 | struct dhcp_bridge { |
678 | char iface[IF_NAMESIZE]; | |
679 | struct dhcp_bridge *alias, *next; | |
680 | }; | |
832af0ba | 681 | |
9009d746 | 682 | struct cond_domain { |
48fd1c4d | 683 | char *domain, *prefix; |
9009d746 | 684 | struct in_addr start, end; |
d74942a0 SK |
685 | #ifdef HAVE_IPV6 |
686 | struct in6_addr start6, end6; | |
687 | #endif | |
688 | int is6; | |
9009d746 | 689 | struct cond_domain *next; |
1f776932 | 690 | }; |
9009d746 | 691 | |
a6ebfacf SK |
692 | #ifdef OPTION6_PREFIX_CLASS |
693 | struct prefix_class { | |
694 | int class; | |
c630924d | 695 | struct dhcp_netid tag; |
a6ebfacf SK |
696 | struct prefix_class *next; |
697 | }; | |
698 | #endif | |
699 | ||
9e4abcb5 | 700 | struct dhcp_context { |
feba5c1d | 701 | unsigned int lease_time, addr_epoch; |
0a852541 SK |
702 | struct in_addr netmask, broadcast; |
703 | struct in_addr local, router; | |
a84fa1d0 | 704 | struct in_addr start, end; /* range of available addresses */ |
c72daea8 SK |
705 | #ifdef HAVE_DHCP6 |
706 | struct in6_addr start6, end6; /* range of available addresses */ | |
e44ddcac | 707 | struct in6_addr local6; |
353ae4d2 | 708 | int prefix, if_index; |
3bc0d932 | 709 | unsigned int valid, preferred; |
1b75c1e6 | 710 | time_t ra_time, ra_short_period_start; |
1f776932 | 711 | char *template_interface; |
c72daea8 | 712 | #endif |
0a852541 | 713 | int flags; |
cdeda28f | 714 | struct dhcp_netid netid, *filter; |
36717eee | 715 | struct dhcp_context *next, *current; |
9e4abcb5 SK |
716 | }; |
717 | ||
30cd9666 SK |
718 | #define CONTEXT_STATIC 1 |
719 | #define CONTEXT_NETMASK 2 | |
720 | #define CONTEXT_BRDCAST 4 | |
721 | #define CONTEXT_PROXY 8 | |
722 | #define CONTEXT_RA_ONLY 16 | |
723 | #define CONTEXT_RA_DONE 32 | |
724 | #define CONTEXT_RA_NAME 64 | |
725 | #define CONTEXT_RA_STATELESS 128 | |
726 | #define CONTEXT_DHCP 256 | |
c8257540 | 727 | #define CONTEXT_DEPRECATE 512 |
1f776932 SK |
728 | #define CONTEXT_TEMPLATE 1024 /* create contexts using addresses */ |
729 | #define CONTEXT_CONSTRUCTED 2048 | |
730 | #define CONTEXT_GC 4096 | |
731 | #define CONTEXT_RA 8192 | |
49333cbd | 732 | #define CONTEXT_CONF_USED 16384 |
a6ebfacf | 733 | #define CONTEXT_USED 32768 |
921360ce | 734 | #define CONTEXT_NOAUTH 65536 |
0a852541 | 735 | |
3d8df260 SK |
736 | struct ping_result { |
737 | struct in_addr addr; | |
738 | time_t time; | |
7de060b0 | 739 | unsigned int hash; |
3d8df260 SK |
740 | struct ping_result *next; |
741 | }; | |
9e4abcb5 | 742 | |
832af0ba SK |
743 | struct tftp_file { |
744 | int refcount, fd; | |
745 | off_t size; | |
5aabfc78 SK |
746 | dev_t dev; |
747 | ino_t inode; | |
832af0ba SK |
748 | char filename[]; |
749 | }; | |
750 | ||
751 | struct tftp_transfer { | |
752 | int sockfd; | |
753 | time_t timeout; | |
754 | int backoff; | |
9e038946 SK |
755 | unsigned int block, blocksize, expansion; |
756 | off_t offset; | |
28866e95 | 757 | union mysockaddr peer; |
9e038946 | 758 | char opt_blocksize, opt_transize, netascii, carrylf; |
832af0ba SK |
759 | struct tftp_file *file; |
760 | struct tftp_transfer *next; | |
761 | }; | |
762 | ||
8ef5ada2 SK |
763 | struct addr_list { |
764 | struct in_addr addr; | |
765 | struct addr_list *next; | |
766 | }; | |
767 | ||
8ef5ada2 SK |
768 | struct tftp_prefix { |
769 | char *interface; | |
770 | char *prefix; | |
771 | struct tftp_prefix *next; | |
772 | }; | |
773 | ||
774 | ||
5aabfc78 | 775 | extern struct daemon { |
3be34541 SK |
776 | /* datastuctures representing the command-line and |
777 | config file arguments. All set (including defaults) | |
778 | in option.c */ | |
779 | ||
28866e95 | 780 | unsigned int options, options2; |
3be34541 | 781 | struct resolvc default_resolv, *resolv_files; |
9009d746 | 782 | time_t last_resolv; |
0a852541 | 783 | struct mx_srv_record *mxnames; |
1a6bca81 | 784 | struct naptr *naptr; |
9f7f3b12 | 785 | struct txt_record *txt, *rr; |
832af0ba | 786 | struct ptr_record *ptr; |
e759d426 | 787 | struct host_record *host_records, *host_records_tail; |
9009d746 | 788 | struct cname *cnames; |
4f7b304f | 789 | struct auth_zone *auth_zones; |
f2621c7f | 790 | struct interface_name *int_names; |
3be34541 SK |
791 | char *mxtarget; |
792 | char *lease_file; | |
9e038946 | 793 | char *username, *groupname, *scriptuser; |
c72daea8 | 794 | char *luascript; |
429798fd SK |
795 | char *authserver, *hostmaster; |
796 | struct iname *authinterface; | |
e1ff419c | 797 | struct name_list *secondary_forward_server; |
1a6bca81 | 798 | int group_set, osport; |
3be34541 | 799 | char *domain_suffix; |
2bb73af7 | 800 | struct cond_domain *cond_domain, *synth_domains; |
3be34541 | 801 | char *runfile; |
7cebd20f | 802 | char *lease_change_command; |
49678767 | 803 | struct iname *if_names, *if_addrs, *if_except, *dhcp_except, *auth_peers; |
3be34541 SK |
804 | struct bogus_addr *bogus_addr; |
805 | struct server *servers; | |
13d86c73 | 806 | struct ipsets *ipsets; |
849a8357 | 807 | int log_fac; /* log facility */ |
f2621c7f SK |
808 | char *log_file; /* optional log file */ |
809 | int max_logs; /* queue limit */ | |
208b65c5 | 810 | int cachesize, ftabsize; |
1a6bca81 | 811 | int port, query_port, min_port; |
4f7b304f | 812 | unsigned long local_ttl, neg_ttl, max_ttl, max_cache_ttl, auth_ttl; |
fd9fa481 | 813 | struct hostsfile *addn_hosts; |
1f776932 | 814 | struct dhcp_context *dhcp, *dhcp6; |
3be34541 | 815 | struct dhcp_config *dhcp_conf; |
3634c54e | 816 | struct dhcp_opt *dhcp_opts, *dhcp_match, *dhcp_opts6, *dhcp_match6; |
3be34541 | 817 | struct dhcp_vendor *dhcp_vendors; |
cdeda28f | 818 | struct dhcp_mac *dhcp_macs; |
26128d27 | 819 | struct dhcp_boot *boot_config; |
7622fc06 | 820 | struct pxe_service *pxe_services; |
8ef5ada2 SK |
821 | struct tag_if *tag_if; |
822 | struct addr_list *override_relays; | |
823 | int override; | |
1f15b81d | 824 | int enable_pxe; |
1f776932 | 825 | int doing_ra, doing_dhcp6; |
8ef5ada2 SK |
826 | struct dhcp_netid_list *dhcp_ignore, *dhcp_ignore_names, *dhcp_gen_names; |
827 | struct dhcp_netid_list *force_broadcast, *bootp_dynamic; | |
28866e95 | 828 | struct hostsfile *dhcp_hosts_file, *dhcp_opts_file; |
824af85b | 829 | int dhcp_max, tftp_max; |
9e038946 | 830 | int dhcp_server_port, dhcp_client_port; |
824af85b | 831 | int start_tftp_port, end_tftp_port; |
3be34541 SK |
832 | unsigned int min_leasetime; |
833 | struct doctor *doctors; | |
834 | unsigned short edns_pktsz; | |
824af85b | 835 | char *tftp_prefix; |
8ef5ada2 | 836 | struct tftp_prefix *if_prefix; /* per-interface TFTP prefixes */ |
8b372704 SK |
837 | unsigned int duid_enterprise, duid_config_len; |
838 | unsigned char *duid_config; | |
ad094275 | 839 | char *dbus_name; |
4f7b304f | 840 | unsigned long soa_sn, soa_refresh, soa_retry, soa_expiry; |
c630924d SK |
841 | #ifdef OPTION6_PREFIX_CLASS |
842 | struct prefix_class *prefix_classes; | |
843 | #endif | |
3be34541 SK |
844 | |
845 | /* globally used stuff for DNS */ | |
846 | char *packet; /* packet buffer */ | |
0a852541 | 847 | int packet_buff_sz; /* size of above */ |
3be34541 | 848 | char *namebuff; /* MAXDNAME size buffer */ |
824af85b | 849 | unsigned int local_answer, queries_forwarded; |
1a6bca81 | 850 | struct frec *frec_list; |
3be34541 | 851 | struct serverfd *sfds; |
3d8df260 | 852 | struct irec *interfaces; |
3be34541 SK |
853 | struct listener *listeners; |
854 | struct server *last_server; | |
1f15b81d SK |
855 | time_t forwardtime; |
856 | int forwardcount; | |
cdeda28f SK |
857 | struct server *srv_save; /* Used for resend on DoD */ |
858 | size_t packet_len; /* " " */ | |
3927da46 | 859 | struct randfd *rfd_save; /* " " */ |
7622fc06 | 860 | pid_t tcp_pids[MAX_PROCS]; |
1a6bca81 | 861 | struct randfd randomsocks[RANDOM_SOCKS]; |
316e2730 | 862 | int v6pktinfo; |
1a6bca81 | 863 | |
3be34541 | 864 | /* DHCP state */ |
316e2730 | 865 | int dhcpfd, helperfd, pxefd; |
7622fc06 | 866 | #if defined(HAVE_LINUX_NETWORK) |
0a852541 | 867 | int netlinkfd; |
7622fc06 | 868 | #elif defined(HAVE_BSD_NETWORK) |
5e9e0efb | 869 | int dhcp_raw_fd, dhcp_icmp_fd; |
0a852541 | 870 | #endif |
5e9e0efb | 871 | struct iovec dhcp_packet; |
8ef5ada2 | 872 | char *dhcp_buff, *dhcp_buff2, *dhcp_buff3; |
3d8df260 | 873 | struct ping_result *ping_results; |
cdeda28f | 874 | FILE *lease_stream; |
832af0ba | 875 | struct dhcp_bridge *bridges; |
c72daea8 SK |
876 | #ifdef HAVE_DHCP6 |
877 | int duid_len; | |
878 | unsigned char *duid; | |
879 | struct iovec outpacket; | |
c5ad4e79 | 880 | int dhcp6fd, icmp6fd; |
c72daea8 | 881 | #endif |
3d8df260 | 882 | /* DBus stuff */ |
3d8df260 SK |
883 | /* void * here to avoid depending on dbus headers outside dbus.c */ |
884 | void *dbus; | |
832af0ba | 885 | #ifdef HAVE_DBUS |
3d8df260 SK |
886 | struct watch *watches; |
887 | #endif | |
888 | ||
832af0ba | 889 | /* TFTP stuff */ |
a9530964 | 890 | struct tftp_transfer *tftp_trans, *tftp_done_trans; |
824af85b | 891 | |
c72daea8 SK |
892 | /* utility string buffer, hold max sized IP address as string */ |
893 | char *addrbuff; | |
894 | ||
5aabfc78 | 895 | } *daemon; |
3be34541 | 896 | |
9e4abcb5 | 897 | /* cache.c */ |
5aabfc78 | 898 | void cache_init(void); |
28866e95 | 899 | void log_query(unsigned int flags, char *name, struct all_addr *addr, char *arg); |
7622fc06 | 900 | char *record_source(int index); |
4f7b304f | 901 | void querystr(char *desc, char *str, unsigned short type); |
9e4abcb5 SK |
902 | struct crec *cache_find_by_addr(struct crec *crecp, |
903 | struct all_addr *addr, time_t now, | |
904 | unsigned short prot); | |
905 | struct crec *cache_find_by_name(struct crec *crecp, | |
906 | char *name, time_t now, unsigned short prot); | |
907 | void cache_end_insert(void); | |
908 | void cache_start_insert(void); | |
fd9fa481 SK |
909 | struct crec *cache_insert(char *name, struct all_addr *addr, |
910 | time_t now, unsigned long ttl, unsigned short flags); | |
7622fc06 | 911 | void cache_reload(void); |
4cb1b320 | 912 | void cache_add_dhcp_entry(char *host_name, int prot, struct all_addr *host_address, time_t ttd); |
7de060b0 | 913 | struct in_addr a_record_from_hosts(char *name, time_t now); |
9e4abcb5 | 914 | void cache_unhash_dhcp(void); |
5aabfc78 | 915 | void dump_cache(time_t now); |
9e4abcb5 | 916 | char *cache_get_name(struct crec *crecp); |
b75e9363 | 917 | struct crec *cache_enumerate(int init); |
7b4ad2eb SK |
918 | #ifdef HAVE_DNSSEC |
919 | struct keydata *keydata_alloc(char *data, size_t len); | |
920 | void keydata_free(struct keydata *blocks); | |
921 | #endif | |
9e4abcb5 | 922 | |
2bb73af7 SK |
923 | /* domain.c */ |
924 | char *get_domain(struct in_addr addr); | |
925 | #ifdef HAVE_IPV6 | |
926 | char *get_domain6(struct in6_addr *addr); | |
927 | #endif | |
928 | int is_name_synthetic(int flags, char *name, struct all_addr *addr); | |
929 | int is_rev_synth(int flag, struct all_addr *addr, char *name); | |
930 | ||
9e4abcb5 | 931 | /* rfc1035.c */ |
572b41eb | 932 | unsigned int extract_request(struct dns_header *header, size_t qlen, |
c1bb8504 | 933 | char *name, unsigned short *typep); |
572b41eb | 934 | size_t setup_reply(struct dns_header *header, size_t qlen, |
28866e95 | 935 | struct all_addr *addrp, unsigned int flags, |
cdeda28f | 936 | unsigned long local_ttl); |
572b41eb | 937 | int extract_addresses(struct dns_header *header, size_t qlen, char *namebuff, |
13d86c73 JD |
938 | time_t now, char **ipsets, int is_sign, int checkrebind, |
939 | int checking_disabled); | |
572b41eb | 940 | size_t answer_request(struct dns_header *header, char *limit, size_t qlen, |
f6b7dc47 | 941 | struct in_addr local_addr, struct in_addr local_netmask, time_t now); |
572b41eb | 942 | int check_for_bogus_wildcard(struct dns_header *header, size_t qlen, char *name, |
9e4abcb5 | 943 | struct bogus_addr *addr, time_t now); |
572b41eb | 944 | unsigned char *find_pseudoheader(struct dns_header *header, size_t plen, |
832af0ba | 945 | size_t *len, unsigned char **p, int *is_sign); |
5aabfc78 | 946 | int check_for_local_domain(char *name, time_t now); |
572b41eb SK |
947 | unsigned int questions_crc(struct dns_header *header, size_t plen, char *buff); |
948 | size_t resize_packet(struct dns_header *header, size_t plen, | |
cdeda28f | 949 | unsigned char *pheader, size_t hlen); |
572b41eb | 950 | size_t add_mac(struct dns_header *header, size_t plen, char *limit, union mysockaddr *l3); |
4f7b304f | 951 | int add_resource_record(struct dns_header *header, char *limit, int *truncp, |
b75e9363 | 952 | int nameoffset, unsigned char **pp, unsigned long ttl, |
e1ff419c | 953 | int *offset, unsigned short type, unsigned short class, char *format, ...); |
4f7b304f SK |
954 | unsigned char *skip_questions(struct dns_header *header, size_t plen); |
955 | int extract_name(struct dns_header *header, size_t plen, unsigned char **pp, | |
956 | char *name, int isExtract, int extrabytes); | |
957 | int in_arpa_name_2_addr(char *namein, struct all_addr *addrp); | |
958 | ||
959 | /* auth.c */ | |
4820dce9 | 960 | #ifdef HAVE_AUTH |
49678767 | 961 | size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t now, union mysockaddr *peer_addr); |
4820dce9 | 962 | #endif |
9e4abcb5 SK |
963 | |
964 | /* util.c */ | |
1a6bca81 | 965 | void rand_init(void); |
9e4abcb5 | 966 | unsigned short rand16(void); |
1f15b81d SK |
967 | int legal_hostname(char *c); |
968 | char *canonicalise(char *s, int *nomem); | |
3d8df260 | 969 | unsigned char *do_rfc1035_name(unsigned char *p, char *sval); |
0a852541 | 970 | void *safe_malloc(size_t size); |
1a6bca81 | 971 | void safe_pipe(int *fd, int read_noblock); |
5aabfc78 | 972 | void *whine_malloc(size_t size); |
9e4abcb5 SK |
973 | int sa_len(union mysockaddr *addr); |
974 | int sockaddr_isequal(union mysockaddr *s1, union mysockaddr *s2); | |
c99df938 | 975 | int hostname_isequal(const char *a, const char *b); |
5e9e0efb | 976 | time_t dnsmasq_time(void); |
a84fa1d0 | 977 | int is_same_net(struct in_addr a, struct in_addr b, struct in_addr mask); |
c72daea8 SK |
978 | #ifdef HAVE_IPV6 |
979 | int is_same_net6(struct in6_addr *a, struct in6_addr *b, int prefixlen); | |
52b92f4d SK |
980 | u64 addr6part(struct in6_addr *addr); |
981 | void setaddr6part(struct in6_addr *addr, u64 host); | |
c72daea8 | 982 | #endif |
fd9fa481 | 983 | int retry_send(void); |
0a852541 | 984 | void prettyprint_time(char *buf, unsigned int t); |
3d8df260 | 985 | int prettyprint_addr(union mysockaddr *addr, char *buf); |
0a852541 | 986 | int parse_hex(char *in, unsigned char *out, int maxlen, |
cdeda28f | 987 | unsigned int *wildcard_mask, int *mac_type); |
5e9e0efb SK |
988 | int memcmp_masked(unsigned char *a, unsigned char *b, int len, |
989 | unsigned int mask); | |
990 | int expand_buf(struct iovec *iov, size_t size); | |
5aabfc78 | 991 | char *print_mac(char *buff, unsigned char *mac, int len); |
1697269c | 992 | void bump_maxfd(int fd, int *max); |
1697269c | 993 | int read_write(int fd, unsigned char *packet, int size, int rw); |
7cebd20f | 994 | |
49333cbd SK |
995 | int wildcard_match(const char* wildcard, const char* match); |
996 | ||
f2621c7f | 997 | /* log.c */ |
5aabfc78 | 998 | void die(char *message, char *arg1, int exit_code); |
1a6bca81 | 999 | int log_start(struct passwd *ent_pw, int errfd); |
5aabfc78 | 1000 | int log_reopen(char *log_file); |
f2621c7f SK |
1001 | void my_syslog(int priority, const char *format, ...); |
1002 | void set_log_writer(fd_set *set, int *maxfdp); | |
1003 | void check_log_writer(fd_set *set); | |
5aabfc78 | 1004 | void flush_log(void); |
f2621c7f | 1005 | |
9e4abcb5 | 1006 | /* option.c */ |
5aabfc78 | 1007 | void read_opts (int argc, char **argv, char *compile_opts); |
4cb1b320 SK |
1008 | char *option_string(int prot, unsigned int opt, unsigned char *val, |
1009 | int opt_len, char *buf, int buf_len); | |
824af85b | 1010 | void reread_dhcp(void); |
28866e95 | 1011 | void set_option_bool(unsigned int opt); |
2b5bae9a | 1012 | void reset_option_bool(unsigned int opt); |
28866e95 | 1013 | struct hostsfile *expand_filelist(struct hostsfile *list); |
faafb3f7 SK |
1014 | char *parse_server(char *arg, union mysockaddr *addr, |
1015 | union mysockaddr *source_addr, char *interface, int *flags); | |
9e4abcb5 SK |
1016 | |
1017 | /* forward.c */ | |
1a6bca81 | 1018 | void reply_query(int fd, int family, time_t now); |
5aabfc78 SK |
1019 | void receive_query(struct listener *listen, time_t now); |
1020 | unsigned char *tcp_request(int confd, time_t now, | |
4f7b304f | 1021 | union mysockaddr *local_addr, struct in_addr netmask, int auth_dns); |
5aabfc78 SK |
1022 | void server_gone(struct server *server); |
1023 | struct frec *get_new_frec(time_t now, int *wait); | |
29689cfa | 1024 | int send_from(int fd, int nowild, char *packet, size_t len, |
c72daea8 | 1025 | union mysockaddr *to, struct all_addr *source, |
50303b19 | 1026 | unsigned int iface); |
3be34541 | 1027 | |
9e4abcb5 | 1028 | /* network.c */ |
7622fc06 | 1029 | int indextoname(int fd, int index, char *name); |
824af85b | 1030 | int local_bind(int fd, union mysockaddr *addr, char *intname, int is_tcp); |
1a6bca81 | 1031 | int random_sock(int family); |
824af85b | 1032 | void pre_allocate_sfds(void); |
5aabfc78 SK |
1033 | int reload_servers(char *fname); |
1034 | void check_servers(void); | |
115ac3e4 | 1035 | int enumerate_interfaces(int reset); |
74c95c25 SK |
1036 | void create_wildcard_listeners(void); |
1037 | void create_bound_listeners(int die); | |
1038 | int is_dad_listeners(void); | |
4f7b304f | 1039 | int iface_check(int family, struct all_addr *addr, char *name, int *auth_dns); |
e25db1f2 | 1040 | int loopback_exception(int fd, int family, struct all_addr *addr, char *name); |
3f2873d4 | 1041 | int label_exception(int index, int family, struct all_addr *addr); |
7cebd20f | 1042 | int fix_fd(int fd); |
22ce550e | 1043 | int tcp_interface(int fd, int af); |
c72daea8 SK |
1044 | #ifdef HAVE_IPV6 |
1045 | int set_ipv6pktinfo(int fd); | |
1046 | #endif | |
5d162f20 SK |
1047 | #ifdef HAVE_DHCP6 |
1048 | void join_multicast(int dienow); | |
1049 | #endif | |
3be34541 | 1050 | |
9e4abcb5 | 1051 | /* dhcp.c */ |
7622fc06 | 1052 | #ifdef HAVE_DHCP |
5aabfc78 | 1053 | void dhcp_init(void); |
316e2730 | 1054 | void dhcp_packet(time_t now, int pxe_fd); |
824af85b SK |
1055 | struct dhcp_context *address_available(struct dhcp_context *context, |
1056 | struct in_addr addr, | |
1057 | struct dhcp_netid *netids); | |
1058 | struct dhcp_context *narrow_context(struct dhcp_context *context, | |
1059 | struct in_addr taddr, | |
1060 | struct dhcp_netid *netids); | |
8ef5ada2 | 1061 | int address_allocate(struct dhcp_context *context, |
cdeda28f | 1062 | struct in_addr *addrp, unsigned char *hwaddr, int hw_len, |
3d8df260 | 1063 | struct dhcp_netid *netids, time_t now); |
9009d746 | 1064 | int config_has_mac(struct dhcp_config *config, unsigned char *hwaddr, int len, int type); |
9e4abcb5 SK |
1065 | struct dhcp_config *find_config(struct dhcp_config *configs, |
1066 | struct dhcp_context *context, | |
1067 | unsigned char *clid, int clid_len, | |
cdeda28f SK |
1068 | unsigned char *hwaddr, int hw_len, |
1069 | int hw_type, char *hostname); | |
5aabfc78 | 1070 | void dhcp_read_ethers(void); |
dfa666f2 | 1071 | struct dhcp_config *config_find_by_address(struct dhcp_config *configs, struct in_addr addr); |
5aabfc78 | 1072 | char *host_from_dns(struct in_addr addr); |
7622fc06 | 1073 | #endif |
3be34541 | 1074 | |
9e4abcb5 | 1075 | /* lease.c */ |
7622fc06 | 1076 | #ifdef HAVE_DHCP |
5aabfc78 | 1077 | void lease_update_file(time_t now); |
353ae4d2 | 1078 | void lease_update_dns(int force); |
5aabfc78 | 1079 | void lease_init(time_t now); |
52b92f4d | 1080 | struct dhcp_lease *lease4_allocate(struct in_addr addr); |
c72daea8 | 1081 | #ifdef HAVE_DHCP6 |
4cb1b320 SK |
1082 | struct dhcp_lease *lease6_allocate(struct in6_addr *addrp, int lease_type); |
1083 | struct dhcp_lease *lease6_find(unsigned char *clid, int clid_len, | |
1084 | int lease_type, int iaid, struct in6_addr *addr); | |
a6ebfacf SK |
1085 | void lease6_reset(void); |
1086 | struct dhcp_lease *lease6_find_by_client(struct dhcp_lease *first, int lease_type, unsigned char *clid, int clid_len, int iaid); | |
52b92f4d | 1087 | struct dhcp_lease *lease6_find_by_addr(struct in6_addr *net, int prefix, u64 addr); |
0793380b | 1088 | u64 lease_find_max_addr6(struct dhcp_context *context); |
353ae4d2 | 1089 | void lease_ping_reply(struct in6_addr *sender, unsigned char *packet, char *interface); |
0c050242 | 1090 | void lease_update_slaac(time_t now); |
c72daea8 | 1091 | #endif |
7cebd20f | 1092 | void lease_set_hwaddr(struct dhcp_lease *lease, unsigned char *hwaddr, |
a9ab732e | 1093 | unsigned char *clid, int hw_len, int hw_type, int clid_len, time_t now, int force); |
70c5e3e0 | 1094 | void lease_set_hostname(struct dhcp_lease *lease, char *name, int auth, char *domain, char *config_domain); |
5e9e0efb | 1095 | void lease_set_expires(struct dhcp_lease *lease, unsigned int len, time_t now); |
353ae4d2 | 1096 | void lease_set_interface(struct dhcp_lease *lease, int interface, time_t now); |
cdeda28f | 1097 | struct dhcp_lease *lease_find_by_client(unsigned char *hwaddr, int hw_len, int hw_type, |
0a852541 | 1098 | unsigned char *clid, int clid_len); |
9e4abcb5 | 1099 | struct dhcp_lease *lease_find_by_addr(struct in_addr addr); |
7de060b0 | 1100 | struct in_addr lease_find_max_addr(struct dhcp_context *context); |
9e4abcb5 | 1101 | void lease_prune(struct dhcp_lease *target, time_t now); |
5aabfc78 SK |
1102 | void lease_update_from_configs(void); |
1103 | int do_script_run(time_t now); | |
1104 | void rerun_scripts(void); | |
8b372704 | 1105 | void lease_find_interfaces(time_t now); |
ceae00dd SK |
1106 | #ifdef HAVE_SCRIPT |
1107 | void lease_add_extradata(struct dhcp_lease *lease, unsigned char *data, | |
1108 | unsigned int len, int delim); | |
1109 | #endif | |
7622fc06 | 1110 | #endif |
a84fa1d0 | 1111 | |
9e4abcb5 | 1112 | /* rfc2131.c */ |
7622fc06 | 1113 | #ifdef HAVE_DHCP |
824af85b | 1114 | size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index, |
7de060b0 | 1115 | size_t sz, time_t now, int unicast_dest, int *is_inform, int pxe_fd, struct in_addr fallback); |
9009d746 SK |
1116 | unsigned char *extended_hwaddr(int hwtype, int hwlen, unsigned char *hwaddr, |
1117 | int clid_len, unsigned char *clid, int *len_out); | |
7622fc06 | 1118 | #endif |
3be34541 SK |
1119 | |
1120 | /* dnsmasq.c */ | |
7622fc06 | 1121 | #ifdef HAVE_DHCP |
5e9e0efb | 1122 | int make_icmp_sock(void); |
5aabfc78 | 1123 | int icmp_ping(struct in_addr addr); |
7622fc06 | 1124 | #endif |
353ae4d2 | 1125 | void send_alarm(time_t event, time_t now); |
c72daea8 | 1126 | void send_event(int fd, int event, int data, char *msg); |
5aabfc78 | 1127 | void clear_cache_and_reload(time_t now); |
8ef5ada2 | 1128 | void poll_resolv(int force, int do_reload, time_t now); |
44a2a316 | 1129 | |
0a852541 | 1130 | /* netlink.c */ |
5e9e0efb | 1131 | #ifdef HAVE_LINUX_NETWORK |
5aabfc78 | 1132 | void netlink_init(void); |
1f776932 | 1133 | void netlink_multicast(time_t now); |
5e9e0efb SK |
1134 | #endif |
1135 | ||
1136 | /* bpf.c */ | |
824af85b | 1137 | #ifdef HAVE_BSD_NETWORK |
5aabfc78 SK |
1138 | void init_bpf(void); |
1139 | void send_via_bpf(struct dhcp_packet *mess, size_t len, | |
5e9e0efb | 1140 | struct in_addr iface_addr, struct ifreq *ifr); |
0a852541 | 1141 | #endif |
3d8df260 | 1142 | |
824af85b | 1143 | /* bpf.c or netlink.c */ |
28866e95 | 1144 | int iface_enumerate(int family, void *parm, int (callback)()); |
824af85b | 1145 | |
3d8df260 SK |
1146 | /* dbus.c */ |
1147 | #ifdef HAVE_DBUS | |
5aabfc78 SK |
1148 | char *dbus_init(void); |
1149 | void check_dbus_listeners(fd_set *rset, fd_set *wset, fd_set *eset); | |
1150 | void set_dbus_listeners(int *maxfdp, fd_set *rset, fd_set *wset, fd_set *eset); | |
316e2730 | 1151 | # ifdef HAVE_DHCP |
1f15b81d | 1152 | void emit_dbus_signal(int action, struct dhcp_lease *lease, char *hostname); |
316e2730 | 1153 | # endif |
3d8df260 | 1154 | #endif |
1697269c | 1155 | |
13d86c73 JD |
1156 | /* ipset.c */ |
1157 | #ifdef HAVE_IPSET | |
1158 | void ipset_init(void); | |
1159 | int add_to_ipset(const char *setname, const struct all_addr *ipaddr, int flags, int remove); | |
1160 | #endif | |
1161 | ||
1697269c | 1162 | /* helper.c */ |
0068301d | 1163 | #if defined(HAVE_SCRIPT) |
1a6bca81 | 1164 | int create_helper(int event_fd, int err_fd, uid_t uid, gid_t gid, long max_fd); |
5aabfc78 SK |
1165 | void helper_write(void); |
1166 | void queue_script(int action, struct dhcp_lease *lease, | |
1167 | char *hostname, time_t now); | |
a9530964 SK |
1168 | #ifdef HAVE_TFTP |
1169 | void queue_tftp(off_t file_len, char *filename, union mysockaddr *peer); | |
1170 | #endif | |
1697269c | 1171 | int helper_buf_empty(void); |
5aabfc78 | 1172 | #endif |
832af0ba SK |
1173 | |
1174 | /* tftp.c */ | |
1175 | #ifdef HAVE_TFTP | |
5aabfc78 SK |
1176 | void tftp_request(struct listener *listen, time_t now); |
1177 | void check_tftp_listeners(fd_set *rset, time_t now); | |
a9530964 | 1178 | int do_tftp_script_run(void); |
832af0ba | 1179 | #endif |
7de060b0 SK |
1180 | |
1181 | /* conntrack.c */ | |
1182 | #ifdef HAVE_CONNTRACK | |
1183 | int get_incoming_mark(union mysockaddr *peer_addr, struct all_addr *local_addr, | |
1184 | int istcp, unsigned int *markp); | |
1185 | #endif | |
c72daea8 | 1186 | |
52b92f4d SK |
1187 | /* dhcp6.c */ |
1188 | #ifdef HAVE_DHCP6 | |
1189 | void dhcp6_init(void); | |
1190 | void dhcp6_packet(time_t now); | |
a6ebfacf | 1191 | struct dhcp_context *address6_allocate(struct dhcp_context *context, unsigned char *clid, int clid_len, |
c630924d | 1192 | int iaid, int serial, struct dhcp_netid *netids, int plain_range, struct in6_addr *ans); |
de92b479 | 1193 | int config_valid(struct dhcp_config *config, struct dhcp_context *context, struct in6_addr *addr); |
52b92f4d SK |
1194 | struct dhcp_context *address6_available(struct dhcp_context *context, |
1195 | struct in6_addr *taddr, | |
c630924d SK |
1196 | struct dhcp_netid *netids, |
1197 | int plain_range); | |
37c9cceb SK |
1198 | struct dhcp_context *address6_valid(struct dhcp_context *context, |
1199 | struct in6_addr *taddr, | |
c630924d SK |
1200 | struct dhcp_netid *netids, |
1201 | int plain_range); | |
4cb1b320 SK |
1202 | struct dhcp_config *find_config6(struct dhcp_config *configs, |
1203 | struct dhcp_context *context, | |
1204 | unsigned char *duid, int duid_len, | |
1205 | char *hostname); | |
ceae00dd SK |
1206 | struct dhcp_config *config_find_by_address6(struct dhcp_config *configs, struct in6_addr *net, |
1207 | int prefix, u64 addr); | |
4cb1b320 | 1208 | void make_duid(time_t now); |
1f776932 | 1209 | void dhcp_construct_contexts(time_t now); |
52b92f4d SK |
1210 | #endif |
1211 | ||
c72daea8 SK |
1212 | /* rfc3315.c */ |
1213 | #ifdef HAVE_DHCP6 | |
1d0f91c4 SK |
1214 | unsigned short dhcp6_reply(struct dhcp_context *context, int interface, char *iface_name, |
1215 | struct in6_addr *fallback, size_t sz, int is_multicast, time_t now); | |
c72daea8 | 1216 | #endif |
4cb1b320 SK |
1217 | |
1218 | /* dhcp-common.c */ | |
ceae00dd | 1219 | #ifdef HAVE_DHCP |
4cb1b320 SK |
1220 | void dhcp_common_init(void); |
1221 | ssize_t recv_dhcp_packet(int fd, struct msghdr *msg); | |
1222 | struct dhcp_netid *run_tag_if(struct dhcp_netid *input); | |
1223 | struct dhcp_netid *option_filter(struct dhcp_netid *tags, struct dhcp_netid *context_tags, | |
1224 | struct dhcp_opt *opts); | |
1225 | int match_netid(struct dhcp_netid *check, struct dhcp_netid *pool, int negonly); | |
1226 | char *strip_hostname(char *hostname); | |
1227 | void log_tags(struct dhcp_netid *netid, u32 xid); | |
3634c54e | 1228 | int match_bytes(struct dhcp_opt *o, unsigned char *p, int len); |
ceae00dd | 1229 | void dhcp_update_configs(struct dhcp_config *configs); |
40ef23b5 | 1230 | void display_opts(void); |
bd08ae67 SK |
1231 | int lookup_dhcp_opt(int prot, char *name); |
1232 | int lookup_dhcp_len(int prot, int val); | |
40ef23b5 SK |
1233 | char *option_string(int prot, unsigned int opt, unsigned char *val, |
1234 | int opt_len, char *buf, int buf_len); | |
9380ba70 SK |
1235 | #ifdef HAVE_LINUX_NETWORK |
1236 | void bindtodevice(int fd); | |
1237 | #endif | |
843c96b4 | 1238 | # ifdef HAVE_DHCP6 |
40ef23b5 | 1239 | void display_opts6(void); |
843c96b4 | 1240 | # endif |
1f776932 | 1241 | void log_context(int family, struct dhcp_context *context); |
c72daea8 | 1242 | #endif |
c5ad4e79 SK |
1243 | |
1244 | /* outpacket.c */ | |
1245 | #ifdef HAVE_DHCP6 | |
1246 | void end_opt6(int container); | |
1247 | int save_counter(int newval); | |
1248 | void *expand(size_t headroom); | |
1249 | int new_opt6(int opt); | |
1250 | void *put_opt6(void *data, size_t len); | |
1251 | void put_opt6_long(unsigned int val); | |
1252 | void put_opt6_short(unsigned int val); | |
1253 | void put_opt6_char(unsigned int val); | |
1254 | void put_opt6_string(char *s); | |
1255 | #endif | |
1256 | ||
1257 | /* radv.c */ | |
1258 | #ifdef HAVE_DHCP6 | |
1259 | void ra_init(time_t now); | |
1f776932 | 1260 | void icmp6_packet(time_t now); |
c5ad4e79 | 1261 | time_t periodic_ra(time_t now); |
353ae4d2 SK |
1262 | void ra_start_unsolicted(time_t now, struct dhcp_context *context); |
1263 | #endif | |
1264 | ||
1265 | /* slaac.c */ | |
1266 | #ifdef HAVE_DHCP6 | |
a9ab732e | 1267 | void slaac_add_addrs(struct dhcp_lease *lease, time_t now, int force); |
353ae4d2 SK |
1268 | time_t periodic_slaac(time_t now, struct dhcp_lease *leases); |
1269 | void slaac_ping_reply(struct in6_addr *sender, unsigned char *packet, char *interface, struct dhcp_lease *leases); | |
c5ad4e79 | 1270 | #endif |