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824af85b SK |
1 | /* dnsmasq is Copyright (c) 2000-2008 Simon Kelley |
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 SK |
12 | |
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 | ||
824af85b | 17 | #define COPYRIGHT "Copyright (C) 2000-2008 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 SK |
24 | |
25 | /* Get linux C library versions. */ | |
26 | #ifdef __linux__ | |
27 | # define _GNU_SOURCE | |
28 | # include <features.h> | |
29 | #endif | |
30 | ||
9e4abcb5 | 31 | /* get these before config.h for IPv6 stuff... */ |
44a2a316 | 32 | #include <sys/types.h> |
9e4abcb5 SK |
33 | #include <netinet/in.h> |
34 | ||
f6b7dc47 SK |
35 | #ifdef __APPLE__ |
36 | /* need this before arpa/nameser.h */ | |
37 | # define BIND_8_COMPAT | |
38 | #endif | |
3be34541 | 39 | #include <arpa/nameser.h> |
9e4abcb5 | 40 | |
59353a6b SK |
41 | /* and this. */ |
42 | #include <getopt.h> | |
43 | ||
9e4abcb5 | 44 | #include "config.h" |
b8187c80 SK |
45 | |
46 | #define gettext_noop(S) (S) | |
824af85b | 47 | #ifndef LOCALEDIR |
b8187c80 SK |
48 | # define _(S) (S) |
49 | #else | |
50 | # include <libintl.h> | |
51 | # include <locale.h> | |
52 | # define _(S) gettext(S) | |
53 | #endif | |
54 | ||
9e4abcb5 SK |
55 | #include <arpa/inet.h> |
56 | #include <sys/stat.h> | |
57 | #include <sys/socket.h> | |
9e4abcb5 | 58 | #include <sys/ioctl.h> |
824af85b SK |
59 | #if defined(HAVE_SOLARIS_NETWORK) |
60 | #include <sys/sockio.h> | |
61 | #endif | |
9e4abcb5 | 62 | #include <sys/select.h> |
feba5c1d | 63 | #include <sys/wait.h> |
9e4abcb5 | 64 | #include <sys/time.h> |
f2621c7f | 65 | #include <sys/un.h> |
8a911ccc | 66 | #include <limits.h> |
9e4abcb5 SK |
67 | #include <net/if.h> |
68 | #include <unistd.h> | |
69 | #include <stdio.h> | |
70 | #include <string.h> | |
71 | #include <stdlib.h> | |
72 | #include <fcntl.h> | |
73 | #include <ctype.h> | |
74 | #include <signal.h> | |
9e038946 | 75 | #include <stddef.h> |
9e4abcb5 SK |
76 | #include <time.h> |
77 | #include <errno.h> | |
78 | #include <pwd.h> | |
79 | #include <grp.h> | |
f6b7dc47 | 80 | #include <stdarg.h> |
1a6bca81 | 81 | #if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__sun__) || defined (__sun) |
44a2a316 SK |
82 | # include <netinet/if_ether.h> |
83 | #else | |
84 | # include <net/ethernet.h> | |
85 | #endif | |
9e4abcb5 SK |
86 | #include <net/if_arp.h> |
87 | #include <netinet/in_systm.h> | |
88 | #include <netinet/ip.h> | |
3be34541 | 89 | #include <netinet/ip_icmp.h> |
5e9e0efb | 90 | #include <sys/uio.h> |
849a8357 SK |
91 | #include <syslog.h> |
92 | #include <dirent.h> | |
5e9e0efb | 93 | #ifndef HAVE_LINUX_NETWORK |
44a2a316 | 94 | # include <net/if_dl.h> |
9e4abcb5 | 95 | #endif |
5e9e0efb | 96 | |
824af85b | 97 | #if defined(HAVE_LINUX_NETWORK) |
5e9e0efb SK |
98 | #include <linux/capability.h> |
99 | /* There doesn't seem to be a universally-available | |
9e038946 | 100 | userpace header for these. */ |
5e9e0efb | 101 | extern int capset(cap_user_header_t header, cap_user_data_t data); |
9e038946 SK |
102 | extern int capget(cap_user_header_t header, cap_user_data_t data); |
103 | #define LINUX_CAPABILITY_VERSION_1 0x19980330 | |
104 | #define LINUX_CAPABILITY_VERSION_2 0x20071026 | |
1a6bca81 | 105 | #define LINUX_CAPABILITY_VERSION_3 0x20080522 |
9e038946 | 106 | |
5e9e0efb | 107 | #include <sys/prctl.h> |
824af85b SK |
108 | #elif defined(HAVE_SOLARIS_PRIVS) |
109 | #include <priv.h> | |
5e9e0efb | 110 | #endif |
9e4abcb5 | 111 | |
824af85b | 112 | /* daemon is function in the C library.... */ |
5aabfc78 SK |
113 | #define daemon dnsmasq_daemon |
114 | ||
115 | /* Async event queue */ | |
116 | struct event_desc { | |
117 | int event, data; | |
118 | }; | |
119 | ||
120 | #define EVENT_RELOAD 1 | |
121 | #define EVENT_DUMP 2 | |
122 | #define EVENT_ALARM 3 | |
123 | #define EVENT_TERM 4 | |
124 | #define EVENT_CHILD 5 | |
125 | #define EVENT_REOPEN 6 | |
126 | #define EVENT_EXITED 7 | |
127 | #define EVENT_KILLED 8 | |
128 | #define EVENT_EXEC_ERR 9 | |
129 | #define EVENT_PIPE_ERR 10 | |
9e038946 | 130 | #define EVENT_USER_ERR 11 |
1a6bca81 SK |
131 | #define EVENT_CAP_ERR 12 |
132 | #define EVENT_PIDFILE 13 | |
133 | #define EVENT_HUSER_ERR 14 | |
134 | #define EVENT_GROUP_ERR 15 | |
135 | #define EVENT_DIE 16 | |
136 | #define EVENT_LOG_ERR 17 | |
5aabfc78 SK |
137 | |
138 | /* Exit codes. */ | |
139 | #define EC_GOOD 0 | |
140 | #define EC_BADCONF 1 | |
141 | #define EC_BADNET 2 | |
142 | #define EC_FILE 3 | |
143 | #define EC_NOMEM 4 | |
144 | #define EC_MISC 5 | |
145 | #define EC_INIT_OFFSET 10 | |
146 | ||
0a852541 SK |
147 | /* Min buffer size: we check after adding each record, so there must be |
148 | memory for the largest packet, and the largest record so the | |
149 | min for DNS is PACKETSZ+MAXDNAME+RRFIXEDSZ which is < 1000. | |
150 | This might be increased is EDNS packet size if greater than the minimum. | |
cdeda28f SK |
151 | */ |
152 | #define DNSMASQ_PACKETSZ PACKETSZ+MAXDNAME+RRFIXEDSZ | |
44a2a316 | 153 | |
1a6bca81 SK |
154 | #define OPT_BOGUSPRIV (1u<<0) |
155 | #define OPT_FILTER (1u<<1) | |
156 | #define OPT_LOG (1u<<2) | |
157 | #define OPT_SELFMX (1u<<3) | |
158 | #define OPT_NO_HOSTS (1u<<4) | |
159 | #define OPT_NO_POLL (1u<<5) | |
160 | #define OPT_DEBUG (1u<<6) | |
161 | #define OPT_ORDER (1u<<7) | |
162 | #define OPT_NO_RESOLV (1u<<8) | |
163 | #define OPT_EXPAND (1u<<9) | |
164 | #define OPT_LOCALMX (1u<<10) | |
165 | #define OPT_NO_NEG (1u<<11) | |
166 | #define OPT_NODOTS_LOCAL (1u<<12) | |
167 | #define OPT_NOWILD (1u<<13) | |
168 | #define OPT_ETHERS (1u<<14) | |
169 | #define OPT_RESOLV_DOMAIN (1u<<15) | |
170 | #define OPT_NO_FORK (1u<<16) | |
171 | #define OPT_AUTHORITATIVE (1u<<17) | |
172 | #define OPT_LOCALISE (1u<<18) | |
173 | #define OPT_DBUS (1u<<19) | |
174 | #define OPT_BOOTP_DYNAMIC (1u<<20) | |
175 | #define OPT_NO_PING (1u<<21) | |
176 | #define OPT_LEASE_RO (1u<<22) | |
177 | #define OPT_ALL_SERVERS (1u<<23) | |
178 | #define OPT_RELOAD (1u<<24) | |
179 | #define OPT_TFTP (1u<<25) | |
180 | #define OPT_TFTP_SECURE (1u<<26) | |
181 | #define OPT_TFTP_NOBLOCK (1u<<27) | |
182 | #define OPT_LOG_OPTS (1u<<28) | |
183 | #define OPT_TFTP_APREF (1u<<29) | |
184 | #define OPT_NO_OVERRIDE (1u<<30) | |
185 | #define OPT_NO_REBIND (1u<<31) | |
9e4abcb5 SK |
186 | |
187 | struct all_addr { | |
188 | union { | |
189 | struct in_addr addr4; | |
190 | #ifdef HAVE_IPV6 | |
191 | struct in6_addr addr6; | |
192 | #endif | |
193 | } addr; | |
194 | }; | |
195 | ||
196 | struct bogus_addr { | |
197 | struct in_addr addr; | |
198 | struct bogus_addr *next; | |
199 | }; | |
200 | ||
1cff166d SK |
201 | /* dns doctor param */ |
202 | struct doctor { | |
203 | struct in_addr in, out, mask; | |
204 | struct doctor *next; | |
205 | }; | |
206 | ||
0a852541 SK |
207 | struct mx_srv_record { |
208 | char *name, *target; | |
3d8df260 SK |
209 | int issrv, srvport, priority, weight; |
210 | unsigned int offset; | |
0a852541 | 211 | struct mx_srv_record *next; |
de37951c SK |
212 | }; |
213 | ||
1a6bca81 SK |
214 | struct naptr { |
215 | char *name, *replace, *regexp, *services, *flags; | |
216 | unsigned int order, pref; | |
217 | struct naptr *next; | |
218 | }; | |
219 | ||
0a852541 SK |
220 | struct txt_record { |
221 | char *name, *txt; | |
222 | unsigned short class, len; | |
223 | struct txt_record *next; | |
f6b7dc47 SK |
224 | }; |
225 | ||
832af0ba SK |
226 | struct ptr_record { |
227 | char *name, *ptr; | |
228 | struct ptr_record *next; | |
229 | }; | |
230 | ||
f2621c7f SK |
231 | struct interface_name { |
232 | char *name; /* domain name */ | |
233 | char *intr; /* interface name */ | |
234 | struct interface_name *next; | |
235 | }; | |
236 | ||
9e4abcb5 SK |
237 | union bigname { |
238 | char name[MAXDNAME]; | |
239 | union bigname *next; /* freelist */ | |
240 | }; | |
241 | ||
242 | struct crec { | |
243 | struct crec *next, *prev, *hash_next; | |
244 | time_t ttd; /* time to die */ | |
fd9fa481 SK |
245 | int uid; |
246 | union { | |
247 | struct all_addr addr; | |
248 | struct { | |
249 | struct crec *cache; | |
250 | int uid; | |
251 | } cname; | |
252 | } addr; | |
9e4abcb5 SK |
253 | unsigned short flags; |
254 | union { | |
255 | char sname[SMALLDNAME]; | |
256 | union bigname *bname; | |
257 | char *namep; | |
258 | } name; | |
259 | }; | |
260 | ||
261 | #define F_IMMORTAL 1 | |
fd9fa481 | 262 | #define F_CONFIG 2 |
9e4abcb5 SK |
263 | #define F_REVERSE 4 |
264 | #define F_FORWARD 8 | |
265 | #define F_DHCP 16 | |
266 | #define F_NEG 32 | |
267 | #define F_HOSTS 64 | |
268 | #define F_IPV4 128 | |
269 | #define F_IPV6 256 | |
270 | #define F_BIGNAME 512 | |
271 | #define F_UPSTREAM 1024 | |
272 | #define F_SERVER 2048 | |
273 | #define F_NXDOMAIN 4096 | |
274 | #define F_QUERY 8192 | |
fd9fa481 | 275 | #define F_CNAME 16384 |
9e4abcb5 SK |
276 | #define F_NOERR 32768 |
277 | ||
278 | /* struct sockaddr is not large enough to hold any address, | |
cdeda28f | 279 | and specifically not big enough to hold an IPv6 address. |
9e4abcb5 SK |
280 | Blech. Roll our own. */ |
281 | union mysockaddr { | |
282 | struct sockaddr sa; | |
283 | struct sockaddr_in in; | |
284 | #ifdef HAVE_BROKEN_SOCKADDR_IN6 | |
285 | /* early versions of glibc don't include sin6_scope_id in sockaddr_in6 | |
286 | but latest kernels _require_ it to be set. The choice is to have | |
287 | dnsmasq fail to compile on back-level libc or fail to run | |
288 | on latest kernels with IPv6. Or to do this: sorry that it's so gross. */ | |
289 | struct my_sockaddr_in6 { | |
290 | sa_family_t sin6_family; /* AF_INET6 */ | |
291 | uint16_t sin6_port; /* transport layer port # */ | |
292 | uint32_t sin6_flowinfo; /* IPv6 traffic class & flow info */ | |
293 | struct in6_addr sin6_addr; /* IPv6 address */ | |
294 | uint32_t sin6_scope_id; /* set of interfaces for a scope */ | |
295 | } in6; | |
296 | #elif defined(HAVE_IPV6) | |
297 | struct sockaddr_in6 in6; | |
298 | #endif | |
299 | }; | |
300 | ||
0a852541 SK |
301 | #define SERV_FROM_RESOLV 1 /* 1 for servers from resolv, 0 for command line. */ |
302 | #define SERV_NO_ADDR 2 /* no server, this domain is local only */ | |
303 | #define SERV_LITERAL_ADDRESS 4 /* addr is the answer, not the server */ | |
5aabfc78 SK |
304 | #define SERV_HAS_DOMAIN 8 /* server for one domain only */ |
305 | #define SERV_HAS_SOURCE 16 /* source address defined */ | |
0a852541 SK |
306 | #define SERV_FOR_NODOTS 32 /* server for names with no domain part only */ |
307 | #define SERV_WARNED_RECURSIVE 64 /* avoid warning spam */ | |
3d8df260 SK |
308 | #define SERV_FROM_DBUS 128 /* 1 if source is DBus */ |
309 | #define SERV_MARK 256 /* for mark-and-delete */ | |
9e4abcb5 | 310 | #define SERV_TYPE (SERV_HAS_DOMAIN | SERV_FOR_NODOTS) |
824af85b | 311 | #define SERV_COUNTED 512 /* workspace for log code */ |
9e4abcb5 SK |
312 | |
313 | struct serverfd { | |
314 | int fd; | |
315 | union mysockaddr source_addr; | |
824af85b | 316 | char interface[IF_NAMESIZE+1]; |
9e4abcb5 SK |
317 | struct serverfd *next; |
318 | }; | |
319 | ||
1a6bca81 SK |
320 | struct randfd { |
321 | int fd; | |
322 | unsigned short refcount, family; | |
323 | }; | |
324 | ||
9e4abcb5 SK |
325 | struct server { |
326 | union mysockaddr addr, source_addr; | |
824af85b | 327 | char interface[IF_NAMESIZE+1]; |
1697269c | 328 | struct serverfd *sfd; |
9e4abcb5 | 329 | char *domain; /* set if this server only handles a domain. */ |
feba5c1d | 330 | int flags, tcpfd; |
824af85b | 331 | unsigned int queries, failed_queries; |
9e4abcb5 SK |
332 | struct server *next; |
333 | }; | |
334 | ||
9e4abcb5 SK |
335 | struct irec { |
336 | union mysockaddr addr; | |
f6b7dc47 | 337 | struct in_addr netmask; /* only valid for IPv4 */ |
832af0ba | 338 | int dhcp_ok; |
9e4abcb5 SK |
339 | struct irec *next; |
340 | }; | |
341 | ||
44a2a316 | 342 | struct listener { |
832af0ba | 343 | int fd, tcpfd, tftpfd, family; |
f6b7dc47 | 344 | struct irec *iface; /* only valid for non-wildcard */ |
44a2a316 SK |
345 | struct listener *next; |
346 | }; | |
347 | ||
9e4abcb5 SK |
348 | /* interface and address parms from command line. */ |
349 | struct iname { | |
350 | char *name; | |
351 | union mysockaddr addr; | |
de37951c | 352 | int isloop, used; |
9e4abcb5 SK |
353 | struct iname *next; |
354 | }; | |
355 | ||
356 | /* resolv-file parms from command-line */ | |
357 | struct resolvc { | |
358 | struct resolvc *next; | |
3d8df260 SK |
359 | int is_default, logged; |
360 | time_t mtime; | |
9e4abcb5 SK |
361 | char *name; |
362 | }; | |
363 | ||
fd9fa481 SK |
364 | /* adn-hosts parms from command-line */ |
365 | struct hostsfile { | |
366 | struct hostsfile *next; | |
367 | char *fname; | |
cdeda28f | 368 | int index; /* matches to cache entries for logging */ |
fd9fa481 SK |
369 | }; |
370 | ||
9e4abcb5 SK |
371 | struct frec { |
372 | union mysockaddr source; | |
44a2a316 | 373 | struct all_addr dest; |
832af0ba | 374 | struct server *sentto; /* NULL means free */ |
1a6bca81 SK |
375 | struct randfd *rfd4; |
376 | #ifdef HAVE_IPV6 | |
377 | struct randfd *rfd6; | |
378 | #endif | |
dfa666f2 | 379 | unsigned int iface; |
9e4abcb5 | 380 | unsigned short orig_id, new_id; |
0a852541 | 381 | int fd, forwardall; |
fd9fa481 | 382 | unsigned int crc; |
9e4abcb5 SK |
383 | time_t time; |
384 | struct frec *next; | |
385 | }; | |
386 | ||
1697269c SK |
387 | /* actions in the daemon->helper RPC */ |
388 | #define ACTION_DEL 1 | |
389 | #define ACTION_OLD_HOSTNAME 2 | |
390 | #define ACTION_OLD 3 | |
391 | #define ACTION_ADD 4 | |
392 | ||
cdeda28f SK |
393 | #define DHCP_CHADDR_MAX 16 |
394 | ||
9e4abcb5 SK |
395 | struct dhcp_lease { |
396 | int clid_len; /* length of client identifier */ | |
397 | unsigned char *clid; /* clientid */ | |
398 | char *hostname, *fqdn; /* name from client-hostname option or config */ | |
1697269c | 399 | char *old_hostname; /* hostname before it moved to another lease */ |
7cebd20f SK |
400 | char auth_name; /* hostname came from config, not from client */ |
401 | char new; /* newly created */ | |
208b65c5 SK |
402 | char changed; /* modified */ |
403 | char aux_changed; /* CLID or expiry changed */ | |
9e4abcb5 | 404 | time_t expires; /* lease expiry */ |
5e9e0efb SK |
405 | #ifdef HAVE_BROKEN_RTC |
406 | unsigned int length; | |
407 | #endif | |
cdeda28f SK |
408 | int hwaddr_len, hwaddr_type; |
409 | unsigned char hwaddr[DHCP_CHADDR_MAX]; | |
1a6bca81 | 410 | struct in_addr addr, override; |
1697269c SK |
411 | unsigned char *vendorclass, *userclass; |
412 | unsigned int vendorclass_len, userclass_len; | |
824af85b | 413 | int last_interface; |
9e4abcb5 SK |
414 | struct dhcp_lease *next; |
415 | }; | |
416 | ||
a222641c SK |
417 | struct dhcp_netid { |
418 | char *net; | |
419 | struct dhcp_netid *next; | |
420 | }; | |
421 | ||
26128d27 SK |
422 | struct dhcp_netid_list { |
423 | struct dhcp_netid *list; | |
424 | struct dhcp_netid_list *next; | |
425 | }; | |
1697269c | 426 | |
9e4abcb5 | 427 | struct dhcp_config { |
33820b7e | 428 | unsigned int flags; |
9e4abcb5 SK |
429 | int clid_len; /* length of client identifier */ |
430 | unsigned char *clid; /* clientid */ | |
cdeda28f SK |
431 | int hwaddr_len, hwaddr_type; |
432 | unsigned char hwaddr[DHCP_CHADDR_MAX]; | |
a222641c SK |
433 | char *hostname; |
434 | struct dhcp_netid netid; | |
9e4abcb5 | 435 | struct in_addr addr; |
849a8357 | 436 | time_t decline_time; |
0a852541 | 437 | unsigned int lease_time, wildcard_mask; |
9e4abcb5 SK |
438 | struct dhcp_config *next; |
439 | }; | |
440 | ||
0a852541 SK |
441 | #define CONFIG_DISABLE 1 |
442 | #define CONFIG_CLID 2 | |
443 | #define CONFIG_HWADDR 4 | |
444 | #define CONFIG_TIME 8 | |
445 | #define CONFIG_NAME 16 | |
446 | #define CONFIG_ADDR 32 | |
447 | #define CONFIG_NETID 64 | |
448 | #define CONFIG_NOCLID 128 | |
849a8357 SK |
449 | #define CONFIG_FROM_ETHERS 256 /* entry created by /etc/ethers */ |
450 | #define CONFIG_ADDR_HOSTS 512 /* address added by from /etc/hosts */ | |
451 | #define CONFIG_DECLINED 1024 /* address declined by client */ | |
5aabfc78 | 452 | #define CONFIG_BANK 2048 /* from dhcp hosts file */ |
33820b7e | 453 | |
9e4abcb5 | 454 | struct dhcp_opt { |
cdeda28f | 455 | int opt, len, flags; |
91dccd09 | 456 | unsigned char *val, *vendor_class; |
26128d27 | 457 | struct dhcp_netid *netid; |
9e4abcb5 | 458 | struct dhcp_opt *next; |
a84fa1d0 SK |
459 | }; |
460 | ||
cdeda28f SK |
461 | #define DHOPT_ADDR 1 |
462 | #define DHOPT_STRING 2 | |
6b01084f SK |
463 | #define DHOPT_ENCAPSULATE 4 |
464 | #define DHOPT_VENDOR_MATCH 8 | |
465 | #define DHOPT_FORCE 16 | |
824af85b | 466 | #define DHOPT_BANK 32 |
cdeda28f | 467 | |
26128d27 SK |
468 | struct dhcp_boot { |
469 | char *file, *sname; | |
470 | struct in_addr next_server; | |
471 | struct dhcp_netid *netid; | |
472 | struct dhcp_boot *next; | |
473 | }; | |
474 | ||
f2621c7f SK |
475 | #define MATCH_VENDOR 1 |
476 | #define MATCH_USER 2 | |
477 | #define MATCH_CIRCUIT 3 | |
478 | #define MATCH_REMOTE 4 | |
479 | #define MATCH_SUBSCRIBER 5 | |
824af85b | 480 | #define MATCH_OPTION 6 |
f2621c7f SK |
481 | |
482 | /* vendorclass, userclass, remote-id or cicuit-id */ | |
a84fa1d0 | 483 | struct dhcp_vendor { |
824af85b | 484 | int len, match_type, option; |
a222641c SK |
485 | char *data; |
486 | struct dhcp_netid netid; | |
a84fa1d0 SK |
487 | struct dhcp_vendor *next; |
488 | }; | |
9e4abcb5 | 489 | |
cdeda28f SK |
490 | struct dhcp_mac { |
491 | unsigned int mask; | |
492 | int hwaddr_len, hwaddr_type; | |
493 | unsigned char hwaddr[DHCP_CHADDR_MAX]; | |
494 | struct dhcp_netid netid; | |
495 | struct dhcp_mac *next; | |
496 | }; | |
497 | ||
9e038946 | 498 | #ifdef HAVE_BSD_BRIDGE |
832af0ba SK |
499 | struct dhcp_bridge { |
500 | char iface[IF_NAMESIZE]; | |
501 | struct dhcp_bridge *alias, *next; | |
502 | }; | |
503 | #endif | |
504 | ||
9e4abcb5 | 505 | struct dhcp_context { |
feba5c1d | 506 | unsigned int lease_time, addr_epoch; |
0a852541 SK |
507 | struct in_addr netmask, broadcast; |
508 | struct in_addr local, router; | |
a84fa1d0 | 509 | struct in_addr start, end; /* range of available addresses */ |
0a852541 | 510 | int flags; |
cdeda28f | 511 | struct dhcp_netid netid, *filter; |
36717eee | 512 | struct dhcp_context *next, *current; |
9e4abcb5 SK |
513 | }; |
514 | ||
0a852541 | 515 | #define CONTEXT_STATIC 1 |
cdeda28f SK |
516 | #define CONTEXT_NETMASK 2 |
517 | #define CONTEXT_BRDCAST 4 | |
0a852541 SK |
518 | |
519 | ||
9e4abcb5 SK |
520 | typedef unsigned char u8; |
521 | typedef unsigned short u16; | |
522 | typedef unsigned int u32; | |
523 | ||
524 | ||
5e9e0efb SK |
525 | struct dhcp_packet { |
526 | u8 op, htype, hlen, hops; | |
527 | u32 xid; | |
528 | u16 secs, flags; | |
529 | struct in_addr ciaddr, yiaddr, siaddr, giaddr; | |
530 | u8 chaddr[DHCP_CHADDR_MAX], sname[64], file[128]; | |
531 | u8 options[312]; | |
9e4abcb5 SK |
532 | }; |
533 | ||
3d8df260 SK |
534 | struct ping_result { |
535 | struct in_addr addr; | |
536 | time_t time; | |
537 | struct ping_result *next; | |
538 | }; | |
9e4abcb5 | 539 | |
832af0ba SK |
540 | struct tftp_file { |
541 | int refcount, fd; | |
542 | off_t size; | |
5aabfc78 SK |
543 | dev_t dev; |
544 | ino_t inode; | |
832af0ba SK |
545 | char filename[]; |
546 | }; | |
547 | ||
548 | struct tftp_transfer { | |
549 | int sockfd; | |
550 | time_t timeout; | |
551 | int backoff; | |
9e038946 SK |
552 | unsigned int block, blocksize, expansion; |
553 | off_t offset; | |
832af0ba | 554 | struct sockaddr_in peer; |
9e038946 | 555 | char opt_blocksize, opt_transize, netascii, carrylf; |
832af0ba SK |
556 | struct tftp_file *file; |
557 | struct tftp_transfer *next; | |
558 | }; | |
559 | ||
5aabfc78 | 560 | extern struct daemon { |
3be34541 SK |
561 | /* datastuctures representing the command-line and |
562 | config file arguments. All set (including defaults) | |
563 | in option.c */ | |
564 | ||
565 | unsigned int options; | |
566 | struct resolvc default_resolv, *resolv_files; | |
0a852541 | 567 | struct mx_srv_record *mxnames; |
1a6bca81 | 568 | struct naptr *naptr; |
0a852541 | 569 | struct txt_record *txt; |
832af0ba | 570 | struct ptr_record *ptr; |
f2621c7f | 571 | struct interface_name *int_names; |
3be34541 SK |
572 | char *mxtarget; |
573 | char *lease_file; | |
9e038946 | 574 | char *username, *groupname, *scriptuser; |
1a6bca81 | 575 | int group_set, osport; |
3be34541 SK |
576 | char *domain_suffix; |
577 | char *runfile; | |
7cebd20f | 578 | char *lease_change_command; |
3d8df260 | 579 | struct iname *if_names, *if_addrs, *if_except, *dhcp_except; |
3be34541 SK |
580 | struct bogus_addr *bogus_addr; |
581 | struct server *servers; | |
849a8357 | 582 | int log_fac; /* log facility */ |
f2621c7f SK |
583 | char *log_file; /* optional log file */ |
584 | int max_logs; /* queue limit */ | |
208b65c5 | 585 | int cachesize, ftabsize; |
1a6bca81 | 586 | int port, query_port, min_port; |
824af85b | 587 | unsigned long local_ttl, neg_ttl; |
fd9fa481 | 588 | struct hostsfile *addn_hosts; |
3be34541 SK |
589 | struct dhcp_context *dhcp; |
590 | struct dhcp_config *dhcp_conf; | |
6b01084f | 591 | struct dhcp_opt *dhcp_opts; |
3be34541 | 592 | struct dhcp_vendor *dhcp_vendors; |
cdeda28f | 593 | struct dhcp_mac *dhcp_macs; |
26128d27 | 594 | struct dhcp_boot *boot_config; |
824af85b SK |
595 | struct dhcp_netid_list *dhcp_ignore, *dhcp_ignore_names, *force_broadcast; |
596 | char *dhcp_hosts_file, *dhcp_opts_file; | |
597 | int dhcp_max, tftp_max; | |
9e038946 | 598 | int dhcp_server_port, dhcp_client_port; |
824af85b | 599 | int start_tftp_port, end_tftp_port; |
3be34541 SK |
600 | unsigned int min_leasetime; |
601 | struct doctor *doctors; | |
602 | unsigned short edns_pktsz; | |
824af85b | 603 | char *tftp_prefix; |
3be34541 SK |
604 | |
605 | /* globally used stuff for DNS */ | |
606 | char *packet; /* packet buffer */ | |
0a852541 | 607 | int packet_buff_sz; /* size of above */ |
3be34541 | 608 | char *namebuff; /* MAXDNAME size buffer */ |
824af85b | 609 | unsigned int local_answer, queries_forwarded; |
1a6bca81 | 610 | struct frec *frec_list; |
3be34541 | 611 | struct serverfd *sfds; |
3d8df260 | 612 | struct irec *interfaces; |
3be34541 SK |
613 | struct listener *listeners; |
614 | struct server *last_server; | |
cdeda28f SK |
615 | struct server *srv_save; /* Used for resend on DoD */ |
616 | size_t packet_len; /* " " */ | |
1697269c | 617 | pid_t tcp_pids[MAX_PROCS]; |
1a6bca81 SK |
618 | struct randfd randomsocks[RANDOM_SOCKS]; |
619 | ||
3be34541 | 620 | /* DHCP state */ |
1697269c | 621 | int dhcpfd, helperfd; |
5e9e0efb | 622 | #ifdef HAVE_LINUX_NETWORK |
0a852541 | 623 | int netlinkfd; |
5e9e0efb SK |
624 | #else |
625 | int dhcp_raw_fd, dhcp_icmp_fd; | |
0a852541 | 626 | #endif |
5e9e0efb | 627 | struct iovec dhcp_packet; |
3be34541 | 628 | char *dhcp_buff, *dhcp_buff2; |
3d8df260 | 629 | struct ping_result *ping_results; |
cdeda28f | 630 | FILE *lease_stream; |
9e038946 | 631 | #ifdef HAVE_BSD_BRIDGE |
832af0ba SK |
632 | struct dhcp_bridge *bridges; |
633 | #endif | |
3d8df260 SK |
634 | |
635 | /* DBus stuff */ | |
3d8df260 SK |
636 | /* void * here to avoid depending on dbus headers outside dbus.c */ |
637 | void *dbus; | |
832af0ba | 638 | #ifdef HAVE_DBUS |
3d8df260 SK |
639 | struct watch *watches; |
640 | #endif | |
641 | ||
832af0ba SK |
642 | /* TFTP stuff */ |
643 | struct tftp_transfer *tftp_trans; | |
824af85b | 644 | |
5aabfc78 | 645 | } *daemon; |
3be34541 | 646 | |
9e4abcb5 | 647 | /* cache.c */ |
5aabfc78 | 648 | void cache_init(void); |
1a6bca81 SK |
649 | void log_query(unsigned short flags, char *name, struct all_addr *addr, char *arg); |
650 | char *record_source(struct hostsfile *addn_hosts, int index); | |
651 | void querystr(char *str, unsigned short type); | |
9e4abcb5 SK |
652 | struct crec *cache_find_by_addr(struct crec *crecp, |
653 | struct all_addr *addr, time_t now, | |
654 | unsigned short prot); | |
655 | struct crec *cache_find_by_name(struct crec *crecp, | |
656 | char *name, time_t now, unsigned short prot); | |
657 | void cache_end_insert(void); | |
658 | void cache_start_insert(void); | |
fd9fa481 SK |
659 | struct crec *cache_insert(char *name, struct all_addr *addr, |
660 | time_t now, unsigned long ttl, unsigned short flags); | |
661 | void cache_reload(int opts, char *buff, char *domain_suffix, struct hostsfile *addn_hosts); | |
5aabfc78 | 662 | void cache_add_dhcp_entry(char *host_name, struct in_addr *host_address, time_t ttd); |
9e4abcb5 | 663 | void cache_unhash_dhcp(void); |
5aabfc78 | 664 | void dump_cache(time_t now); |
9e4abcb5 SK |
665 | char *cache_get_name(struct crec *crecp); |
666 | ||
667 | /* rfc1035.c */ | |
cdeda28f | 668 | unsigned short extract_request(HEADER *header, size_t qlen, |
c1bb8504 | 669 | char *name, unsigned short *typep); |
cdeda28f SK |
670 | size_t setup_reply(HEADER *header, size_t qlen, |
671 | struct all_addr *addrp, unsigned short flags, | |
672 | unsigned long local_ttl); | |
824af85b | 673 | int extract_addresses(HEADER *header, size_t qlen, char *namebuff, time_t now); |
5aabfc78 | 674 | size_t answer_request(HEADER *header, char *limit, size_t qlen, |
f6b7dc47 | 675 | struct in_addr local_addr, struct in_addr local_netmask, time_t now); |
cdeda28f | 676 | int check_for_bogus_wildcard(HEADER *header, size_t qlen, char *name, |
9e4abcb5 | 677 | struct bogus_addr *addr, time_t now); |
cdeda28f | 678 | unsigned char *find_pseudoheader(HEADER *header, size_t plen, |
832af0ba | 679 | size_t *len, unsigned char **p, int *is_sign); |
5aabfc78 | 680 | int check_for_local_domain(char *name, time_t now); |
cdeda28f SK |
681 | unsigned int questions_crc(HEADER *header, size_t plen, char *buff); |
682 | size_t resize_packet(HEADER *header, size_t plen, | |
683 | unsigned char *pheader, size_t hlen); | |
9e4abcb5 SK |
684 | |
685 | /* util.c */ | |
1a6bca81 | 686 | void rand_init(void); |
9e4abcb5 SK |
687 | unsigned short rand16(void); |
688 | int legal_char(char c); | |
689 | int canonicalise(char *s); | |
3d8df260 | 690 | unsigned char *do_rfc1035_name(unsigned char *p, char *sval); |
0a852541 | 691 | void *safe_malloc(size_t size); |
1a6bca81 | 692 | void safe_pipe(int *fd, int read_noblock); |
5aabfc78 | 693 | void *whine_malloc(size_t size); |
9e4abcb5 SK |
694 | int sa_len(union mysockaddr *addr); |
695 | int sockaddr_isequal(union mysockaddr *s1, union mysockaddr *s2); | |
3d8df260 | 696 | int hostname_isequal(char *a, char *b); |
5e9e0efb | 697 | time_t dnsmasq_time(void); |
a84fa1d0 | 698 | int is_same_net(struct in_addr a, struct in_addr b, struct in_addr mask); |
fd9fa481 | 699 | int retry_send(void); |
0a852541 | 700 | void prettyprint_time(char *buf, unsigned int t); |
3d8df260 | 701 | int prettyprint_addr(union mysockaddr *addr, char *buf); |
0a852541 | 702 | int parse_hex(char *in, unsigned char *out, int maxlen, |
cdeda28f | 703 | unsigned int *wildcard_mask, int *mac_type); |
5e9e0efb SK |
704 | int memcmp_masked(unsigned char *a, unsigned char *b, int len, |
705 | unsigned int mask); | |
706 | int expand_buf(struct iovec *iov, size_t size); | |
5aabfc78 | 707 | char *print_mac(char *buff, unsigned char *mac, int len); |
1697269c | 708 | void bump_maxfd(int fd, int *max); |
1697269c | 709 | int read_write(int fd, unsigned char *packet, int size, int rw); |
7cebd20f | 710 | |
f2621c7f | 711 | /* log.c */ |
5aabfc78 | 712 | void die(char *message, char *arg1, int exit_code); |
1a6bca81 | 713 | int log_start(struct passwd *ent_pw, int errfd); |
5aabfc78 | 714 | int log_reopen(char *log_file); |
f2621c7f SK |
715 | void my_syslog(int priority, const char *format, ...); |
716 | void set_log_writer(fd_set *set, int *maxfdp); | |
717 | void check_log_writer(fd_set *set); | |
5aabfc78 | 718 | void flush_log(void); |
f2621c7f | 719 | |
9e4abcb5 | 720 | /* option.c */ |
5aabfc78 | 721 | void read_opts (int argc, char **argv, char *compile_opts); |
f2621c7f | 722 | char *option_string(unsigned char opt); |
824af85b | 723 | void reread_dhcp(void); |
9e4abcb5 SK |
724 | |
725 | /* forward.c */ | |
1a6bca81 | 726 | void reply_query(int fd, int family, time_t now); |
5aabfc78 SK |
727 | void receive_query(struct listener *listen, time_t now); |
728 | unsigned char *tcp_request(int confd, time_t now, | |
3d8df260 | 729 | struct in_addr local_addr, struct in_addr netmask); |
5aabfc78 SK |
730 | void server_gone(struct server *server); |
731 | struct frec *get_new_frec(time_t now, int *wait); | |
3be34541 | 732 | |
9e4abcb5 | 733 | /* network.c */ |
824af85b | 734 | int local_bind(int fd, union mysockaddr *addr, char *intname, int is_tcp); |
1a6bca81 | 735 | int random_sock(int family); |
824af85b | 736 | void pre_allocate_sfds(void); |
5aabfc78 SK |
737 | int reload_servers(char *fname); |
738 | void check_servers(void); | |
739 | int enumerate_interfaces(); | |
740 | struct listener *create_wildcard_listeners(void); | |
741 | struct listener *create_bound_listeners(void); | |
742 | int iface_check(int family, struct all_addr *addr, | |
832af0ba | 743 | struct ifreq *ifr, int *indexp); |
7cebd20f | 744 | int fix_fd(int fd); |
5aabfc78 | 745 | struct in_addr get_ifaddr(char *intr); |
3be34541 | 746 | |
9e4abcb5 | 747 | /* dhcp.c */ |
5aabfc78 SK |
748 | void dhcp_init(void); |
749 | void dhcp_packet(time_t now); | |
3be34541 | 750 | |
824af85b SK |
751 | struct dhcp_context *address_available(struct dhcp_context *context, |
752 | struct in_addr addr, | |
753 | struct dhcp_netid *netids); | |
754 | struct dhcp_context *narrow_context(struct dhcp_context *context, | |
755 | struct in_addr taddr, | |
756 | struct dhcp_netid *netids); | |
cdeda28f | 757 | int match_netid(struct dhcp_netid *check, struct dhcp_netid *pool, int negonly); |
5aabfc78 | 758 | int address_allocate(struct dhcp_context *context, |
cdeda28f | 759 | struct in_addr *addrp, unsigned char *hwaddr, int hw_len, |
3d8df260 | 760 | struct dhcp_netid *netids, time_t now); |
9e4abcb5 SK |
761 | struct dhcp_config *find_config(struct dhcp_config *configs, |
762 | struct dhcp_context *context, | |
763 | unsigned char *clid, int clid_len, | |
cdeda28f SK |
764 | unsigned char *hwaddr, int hw_len, |
765 | int hw_type, char *hostname); | |
44a2a316 | 766 | void dhcp_update_configs(struct dhcp_config *configs); |
5aabfc78 | 767 | void dhcp_read_ethers(void); |
824af85b | 768 | void check_dhcp_hosts(int fatal); |
dfa666f2 | 769 | struct dhcp_config *config_find_by_address(struct dhcp_config *configs, struct in_addr addr); |
5aabfc78 SK |
770 | char *strip_hostname(char *hostname); |
771 | char *host_from_dns(struct in_addr addr); | |
3be34541 | 772 | |
9e4abcb5 | 773 | /* lease.c */ |
5aabfc78 SK |
774 | void lease_update_file(time_t now); |
775 | void lease_update_dns(); | |
776 | void lease_init(time_t now); | |
7cebd20f SK |
777 | struct dhcp_lease *lease_allocate(struct in_addr addr); |
778 | void lease_set_hwaddr(struct dhcp_lease *lease, unsigned char *hwaddr, | |
cdeda28f | 779 | unsigned char *clid, int hw_len, int hw_type, int clid_len); |
b8187c80 SK |
780 | void lease_set_hostname(struct dhcp_lease *lease, char *name, |
781 | char *suffix, int auth); | |
5e9e0efb | 782 | void lease_set_expires(struct dhcp_lease *lease, unsigned int len, time_t now); |
824af85b | 783 | void lease_set_interface(struct dhcp_lease *lease, int interface); |
cdeda28f | 784 | struct dhcp_lease *lease_find_by_client(unsigned char *hwaddr, int hw_len, int hw_type, |
0a852541 | 785 | unsigned char *clid, int clid_len); |
9e4abcb5 SK |
786 | struct dhcp_lease *lease_find_by_addr(struct in_addr addr); |
787 | void lease_prune(struct dhcp_lease *target, time_t now); | |
5aabfc78 SK |
788 | void lease_update_from_configs(void); |
789 | int do_script_run(time_t now); | |
790 | void rerun_scripts(void); | |
a84fa1d0 | 791 | |
9e4abcb5 | 792 | /* rfc2131.c */ |
824af85b | 793 | size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index, |
5aabfc78 | 794 | size_t sz, time_t now, int unicast_dest, int *is_inform); |
3be34541 SK |
795 | |
796 | /* dnsmasq.c */ | |
5e9e0efb | 797 | int make_icmp_sock(void); |
5aabfc78 SK |
798 | int icmp_ping(struct in_addr addr); |
799 | void send_event(int fd, int event, int data); | |
800 | void clear_cache_and_reload(time_t now); | |
44a2a316 | 801 | |
33820b7e SK |
802 | /* isc.c */ |
803 | #ifdef HAVE_ISC_READER | |
5aabfc78 | 804 | void load_dhcp(time_t now); |
33820b7e | 805 | #endif |
feba5c1d | 806 | |
0a852541 | 807 | /* netlink.c */ |
5e9e0efb | 808 | #ifdef HAVE_LINUX_NETWORK |
5aabfc78 | 809 | void netlink_init(void); |
5aabfc78 | 810 | void netlink_multicast(void); |
5e9e0efb SK |
811 | #endif |
812 | ||
813 | /* bpf.c */ | |
824af85b | 814 | #ifdef HAVE_BSD_NETWORK |
5aabfc78 SK |
815 | void init_bpf(void); |
816 | void send_via_bpf(struct dhcp_packet *mess, size_t len, | |
5e9e0efb | 817 | struct in_addr iface_addr, struct ifreq *ifr); |
0a852541 | 818 | #endif |
3d8df260 | 819 | |
824af85b SK |
820 | /* bpf.c or netlink.c */ |
821 | int iface_enumerate(void *parm, int (*ipv4_callback)(), int (*ipv6_callback)()); | |
822 | ||
3d8df260 SK |
823 | /* dbus.c */ |
824 | #ifdef HAVE_DBUS | |
5aabfc78 SK |
825 | char *dbus_init(void); |
826 | void check_dbus_listeners(fd_set *rset, fd_set *wset, fd_set *eset); | |
827 | void set_dbus_listeners(int *maxfdp, fd_set *rset, fd_set *wset, fd_set *eset); | |
3d8df260 | 828 | #endif |
1697269c SK |
829 | |
830 | /* helper.c */ | |
5aabfc78 | 831 | #ifndef NO_FORK |
1a6bca81 | 832 | int create_helper(int event_fd, int err_fd, uid_t uid, gid_t gid, long max_fd); |
5aabfc78 SK |
833 | void helper_write(void); |
834 | void queue_script(int action, struct dhcp_lease *lease, | |
835 | char *hostname, time_t now); | |
1697269c | 836 | int helper_buf_empty(void); |
5aabfc78 | 837 | #endif |
832af0ba SK |
838 | |
839 | /* tftp.c */ | |
840 | #ifdef HAVE_TFTP | |
5aabfc78 SK |
841 | void tftp_request(struct listener *listen, time_t now); |
842 | void check_tftp_listeners(fd_set *rset, time_t now); | |
832af0ba | 843 | #endif |