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