1: /* dnsmasq is Copyright (c) 2000-2022 Simon Kelley
2:
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
5: the Free Software Foundation; version 2 dated June, 1991, or
6: (at your option) version 3 dated 29 June, 2007.
7:
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.
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/>.
15: */
16:
17: #define COPYRIGHT "Copyright (c) 2000-2022 Simon Kelley"
18:
19: /* We do defines that influence behavior of stdio.h, so complain
20: if included too early. */
21: #ifdef _STDIO_H
22: # error "Header file stdio.h included too early!"
23: #endif
24:
25: #ifndef NO_LARGEFILE
26: /* Ensure we can use files >2GB (log files may grow this big) */
27: # define _LARGEFILE_SOURCE 1
28: # define _FILE_OFFSET_BITS 64
29: #endif
30:
31: /* Get linux C library versions and define _GNU_SOURCE for kFreeBSD. */
32: #if defined(__linux__) || defined(__GLIBC__)
33: # ifndef __ANDROID__
34: # define _GNU_SOURCE
35: # endif
36: # include <features.h>
37: #endif
38:
39: /* Need these defined early */
40: #if defined(__sun) || defined(__sun__)
41: # define _XPG4_2
42: # define __EXTENSIONS__
43: #endif
44:
45: #if (defined(__GNUC__) && __GNUC__ >= 3) || defined(__clang__)
46: #define ATTRIBUTE_NORETURN __attribute__ ((noreturn))
47: #else
48: #define ATTRIBUTE_NORETURN
49: #endif
50:
51: /* get these before config.h for IPv6 stuff... */
52: #include <sys/types.h>
53: #include <sys/socket.h>
54:
55: #ifdef __APPLE__
56: /* Define before netinet/in.h to select API. OSX Lion onwards. */
57: # define __APPLE_USE_RFC_3542
58: #endif
59: #include <netinet/in.h>
60:
61: /* Also needed before config.h. */
62: #include <getopt.h>
63:
64: #include "config.h"
65: #include "ip6addr.h"
66: #include "metrics.h"
67:
68: typedef unsigned char u8;
69: typedef unsigned short u16;
70: typedef unsigned int u32;
71: typedef unsigned long long u64;
72:
73: #define countof(x) (long)(sizeof(x) / sizeof(x[0]))
74: #define MIN(a,b) ((a) < (b) ? (a) : (b))
75:
76: #include "dns-protocol.h"
77: #include "dhcp-protocol.h"
78: #ifdef HAVE_DHCP6
79: #include "dhcp6-protocol.h"
80: #include "radv-protocol.h"
81: #endif
82:
83: #define gettext_noop(S) (S)
84: #ifndef LOCALEDIR
85: # define _(S) (S)
86: #else
87: # include <libintl.h>
88: # include <locale.h>
89: # define _(S) gettext(S)
90: #endif
91:
92: #include <arpa/inet.h>
93: #include <sys/stat.h>
94: #include <sys/ioctl.h>
95: #if defined(HAVE_SOLARIS_NETWORK)
96: # include <sys/sockio.h>
97: #endif
98: #include <poll.h>
99: #include <sys/wait.h>
100: #include <sys/time.h>
101: #include <sys/un.h>
102: #include <limits.h>
103: #include <net/if.h>
104: #if defined(HAVE_SOLARIS_NETWORK) && !defined(ifr_mtu)
105: /* Some solaris net/if./h omit this. */
106: # define ifr_mtu ifr_ifru.ifru_metric
107: #endif
108: #include <unistd.h>
109: #include <stdio.h>
110: #include <stdint.h>
111: #include <string.h>
112: #include <stdlib.h>
113: #include <fcntl.h>
114: #include <ctype.h>
115: #include <signal.h>
116: #include <stddef.h>
117: #include <time.h>
118: #include <errno.h>
119: #include <pwd.h>
120: #include <grp.h>
121: #include <stdarg.h>
122: #if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__sun__) || defined (__sun) || defined (__ANDROID__)
123: # include <netinet/if_ether.h>
124: #else
125: # include <net/ethernet.h>
126: #endif
127: #include <net/if_arp.h>
128: #include <netinet/in_systm.h>
129: #include <netinet/ip.h>
130: #include <netinet/ip6.h>
131: #include <netinet/ip_icmp.h>
132: #include <netinet/tcp.h>
133: #include <sys/uio.h>
134: #include <syslog.h>
135: #include <dirent.h>
136: #include <netdb.h>
137: #ifndef HAVE_LINUX_NETWORK
138: # include <net/if_dl.h>
139: #endif
140:
141: #if defined(HAVE_LINUX_NETWORK)
142: #include <linux/version.h>
143: #include <linux/sockios.h>
144: #include <linux/capability.h>
145: /* There doesn't seem to be a universally-available
146: userspace header for these. */
147: extern int capset(cap_user_header_t header, cap_user_data_t data);
148: extern int capget(cap_user_header_t header, cap_user_data_t data);
149: #define LINUX_CAPABILITY_VERSION_1 0x19980330
150: #define LINUX_CAPABILITY_VERSION_2 0x20071026
151: #define LINUX_CAPABILITY_VERSION_3 0x20080522
152:
153: #include <sys/prctl.h>
154: #elif defined(HAVE_SOLARIS_NETWORK)
155: #include <priv.h>
156: #endif
157:
158: /* Backwards compat with 2.83 */
159: #if defined(HAVE_NETTLEHASH)
160: # define HAVE_CRYPTOHASH
161: #endif
162: #if defined(HAVE_DNSSEC) || defined(HAVE_CRYPTOHASH)
163: # include <nettle/nettle-meta.h>
164: #endif
165:
166: /* daemon is function in the C library.... */
167: #define daemon dnsmasq_daemon
168:
169: #define ADDRSTRLEN INET6_ADDRSTRLEN
170:
171: /* Async event queue */
172: struct event_desc {
173: int event, data, msg_sz;
174: };
175:
176: #define EVENT_RELOAD 1
177: #define EVENT_DUMP 2
178: #define EVENT_ALARM 3
179: #define EVENT_TERM 4
180: #define EVENT_CHILD 5
181: #define EVENT_REOPEN 6
182: #define EVENT_EXITED 7
183: #define EVENT_KILLED 8
184: #define EVENT_EXEC_ERR 9
185: #define EVENT_PIPE_ERR 10
186: #define EVENT_USER_ERR 11
187: #define EVENT_CAP_ERR 12
188: #define EVENT_PIDFILE 13
189: #define EVENT_HUSER_ERR 14
190: #define EVENT_GROUP_ERR 15
191: #define EVENT_DIE 16
192: #define EVENT_LOG_ERR 17
193: #define EVENT_FORK_ERR 18
194: #define EVENT_LUA_ERR 19
195: #define EVENT_TFTP_ERR 20
196: #define EVENT_INIT 21
197: #define EVENT_NEWADDR 22
198: #define EVENT_NEWROUTE 23
199: #define EVENT_TIME_ERR 24
200: #define EVENT_SCRIPT_LOG 25
201: #define EVENT_TIME 26
202:
203: /* Exit codes. */
204: #define EC_GOOD 0
205: #define EC_BADCONF 1
206: #define EC_BADNET 2
207: #define EC_FILE 3
208: #define EC_NOMEM 4
209: #define EC_MISC 5
210: #define EC_INIT_OFFSET 10
211:
212: #define OPT_BOGUSPRIV 0
213: #define OPT_FILTER 1
214: #define OPT_LOG 2
215: #define OPT_SELFMX 3
216: #define OPT_NO_HOSTS 4
217: #define OPT_NO_POLL 5
218: #define OPT_DEBUG 6
219: #define OPT_ORDER 7
220: #define OPT_NO_RESOLV 8
221: #define OPT_EXPAND 9
222: #define OPT_LOCALMX 10
223: #define OPT_NO_NEG 11
224: #define OPT_NODOTS_LOCAL 12
225: #define OPT_NOWILD 13
226: #define OPT_ETHERS 14
227: #define OPT_RESOLV_DOMAIN 15
228: #define OPT_NO_FORK 16
229: #define OPT_AUTHORITATIVE 17
230: #define OPT_LOCALISE 18
231: #define OPT_DBUS 19
232: #define OPT_DHCP_FQDN 20
233: #define OPT_NO_PING 21
234: #define OPT_LEASE_RO 22
235: #define OPT_ALL_SERVERS 23
236: #define OPT_RELOAD 24
237: #define OPT_LOCAL_REBIND 25
238: #define OPT_TFTP_SECURE 26
239: #define OPT_TFTP_NOBLOCK 27
240: #define OPT_LOG_OPTS 28
241: #define OPT_TFTP_APREF_IP 29
242: #define OPT_NO_OVERRIDE 30
243: #define OPT_NO_REBIND 31
244: #define OPT_ADD_MAC 32
245: #define OPT_DNSSEC_PROXY 33
246: #define OPT_CONSEC_ADDR 34
247: #define OPT_CONNTRACK 35
248: #define OPT_FQDN_UPDATE 36
249: #define OPT_RA 37
250: #define OPT_TFTP_LC 38
251: #define OPT_CLEVERBIND 39
252: #define OPT_TFTP 40
253: #define OPT_CLIENT_SUBNET 41
254: #define OPT_QUIET_DHCP 42
255: #define OPT_QUIET_DHCP6 43
256: #define OPT_QUIET_RA 44
257: #define OPT_DNSSEC_VALID 45
258: #define OPT_DNSSEC_TIME 46
259: #define OPT_DNSSEC_DEBUG 47
260: #define OPT_DNSSEC_IGN_NS 48
261: #define OPT_LOCAL_SERVICE 49
262: #define OPT_LOOP_DETECT 50
263: #define OPT_EXTRALOG 51
264: #define OPT_TFTP_NO_FAIL 52
265: #define OPT_SCRIPT_ARP 53
266: #define OPT_MAC_B64 54
267: #define OPT_MAC_HEX 55
268: #define OPT_TFTP_APREF_MAC 56
269: #define OPT_RAPID_COMMIT 57
270: #define OPT_UBUS 58
271: #define OPT_IGNORE_CLID 59
272: #define OPT_SINGLE_PORT 60
273: #define OPT_LEASE_RENEW 61
274: #define OPT_LOG_DEBUG 62
275: #define OPT_UMBRELLA 63
276: #define OPT_UMBRELLA_DEVID 64
277: #define OPT_CMARK_ALST_EN 65
278: #define OPT_QUIET_TFTP 66
279: #define OPT_FILTER_A 67
280: #define OPT_FILTER_AAAA 68
281: #define OPT_STRIP_ECS 69
282: #define OPT_STRIP_MAC 70
283: #define OPT_NORR 71
284: #define OPT_NO_IDENT 72
285: #define OPT_LAST 73
286:
287: #define OPTION_BITS (sizeof(unsigned int)*8)
288: #define OPTION_SIZE ( (OPT_LAST/OPTION_BITS)+((OPT_LAST%OPTION_BITS)!=0) )
289: #define option_var(x) (daemon->options[(x) / OPTION_BITS])
290: #define option_val(x) ((1u) << ((x) % OPTION_BITS))
291: #define option_bool(x) (option_var(x) & option_val(x))
292:
293: /* extra flags for my_syslog, we use facilities since they are known
294: not to occupy the same bits as priorities, no matter how syslog.h is set up.
295: MS_DEBUG messages are suppressed unless --log-debug is set. */
296: #define MS_TFTP LOG_USER
297: #define MS_DHCP LOG_DAEMON
298: #define MS_SCRIPT LOG_MAIL
299: #define MS_DEBUG LOG_NEWS
300:
301: /* Note that this is used widely as a container for IPv4/IPv6 addresses,
302: so for that reason, was well as to avoid wasting memory in almost every
303: cache entry, the other variants should not be larger than
304: sizeof(struct in6_addr) - 16 bytes.
305: */
306: union all_addr {
307: struct in_addr addr4;
308: struct in6_addr addr6;
309: struct {
310: union {
311: struct crec *cache;
312: char *name;
313: } target;
314: unsigned int uid;
315: int is_name_ptr; /* disciminates target union */
316: } cname;
317: struct {
318: struct blockdata *keydata;
319: unsigned short keylen, flags, keytag;
320: unsigned char algo;
321: } key;
322: struct {
323: struct blockdata *keydata;
324: unsigned short keylen, keytag;
325: unsigned char algo;
326: unsigned char digest;
327: } ds;
328: struct {
329: struct blockdata *target;
330: unsigned short targetlen, srvport, priority, weight;
331: } srv;
332: /* for log_query */
333: struct {
334: unsigned short keytag, algo, digest, rcode;
335: int ede;
336: } log;
337: };
338:
339:
340: struct bogus_addr {
341: int is6, prefix;
342: union all_addr addr;
343: struct bogus_addr *next;
344: };
345:
346: /* dns doctor param */
347: struct doctor {
348: struct in_addr in, end, out, mask;
349: struct doctor *next;
350: };
351:
352: struct mx_srv_record {
353: char *name, *target;
354: int issrv, srvport, priority, weight;
355: unsigned int offset;
356: struct mx_srv_record *next;
357: };
358:
359: struct naptr {
360: char *name, *replace, *regexp, *services, *flags;
361: unsigned int order, pref;
362: struct naptr *next;
363: };
364:
365: #ifndef NO_ID
366: #define TXT_STAT_CACHESIZE 1
367: #define TXT_STAT_INSERTS 2
368: #define TXT_STAT_EVICTIONS 3
369: #define TXT_STAT_MISSES 4
370: #define TXT_STAT_HITS 5
371: #define TXT_STAT_AUTH 6
372: #define TXT_STAT_SERVERS 7
373: #endif
374:
375: struct txt_record {
376: char *name;
377: unsigned char *txt;
378: unsigned short class, len;
379: int stat;
380: struct txt_record *next;
381: };
382:
383: struct ptr_record {
384: char *name, *ptr;
385: struct ptr_record *next;
386: };
387:
388: struct cname {
389: int ttl, flag;
390: char *alias, *target;
391: struct cname *next, *targetp;
392: };
393:
394: struct ds_config {
395: char *name, *digest;
396: int digestlen, class, algo, keytag, digest_type;
397: struct ds_config *next;
398: };
399:
400: #define ADDRLIST_LITERAL 1
401: #define ADDRLIST_IPV6 2
402: #define ADDRLIST_REVONLY 4
403: #define ADDRLIST_PREFIX 8
404: #define ADDRLIST_WILDCARD 16
405: #define ADDRLIST_DECLINED 32
406:
407: struct addrlist {
408: union all_addr addr;
409: int flags, prefixlen;
410: time_t decline_time;
411: struct addrlist *next;
412: };
413:
414: #define AUTH6 1
415: #define AUTH4 2
416:
417: struct auth_zone {
418: char *domain;
419: struct auth_name_list {
420: char *name;
421: int flags;
422: struct auth_name_list *next;
423: } *interface_names;
424: struct addrlist *subnet;
425: struct addrlist *exclude;
426: struct auth_zone *next;
427: };
428:
429: #define HR_6 1
430: #define HR_4 2
431:
432: struct host_record {
433: int ttl, flags;
434: struct name_list {
435: char *name;
436: struct name_list *next;
437: } *names;
438: struct in_addr addr;
439: struct in6_addr addr6;
440: struct host_record *next;
441: };
442:
443: #define IN4 1
444: #define IN6 2
445: #define INP4 4
446: #define INP6 8
447:
448: struct interface_name {
449: char *name; /* domain name */
450: char *intr; /* interface name */
451: int flags;
452: struct in_addr proto4;
453: struct in6_addr proto6;
454: struct addrlist *addr;
455: struct interface_name *next;
456: };
457:
458: union bigname {
459: char name[MAXDNAME];
460: union bigname *next; /* freelist */
461: };
462:
463: struct blockdata {
464: struct blockdata *next;
465: unsigned char key[KEYBLOCK_LEN];
466: };
467:
468: struct crec {
469: struct crec *next, *prev, *hash_next;
470: union all_addr addr;
471: time_t ttd; /* time to die */
472: /* used as class if DNSKEY/DS, index to source for F_HOSTS */
473: unsigned int uid;
474: unsigned int flags;
475: union {
476: char sname[SMALLDNAME];
477: union bigname *bname;
478: char *namep;
479: } name;
480: };
481:
482: #define SIZEOF_BARE_CREC (sizeof(struct crec) - SMALLDNAME)
483: #define SIZEOF_POINTER_CREC (sizeof(struct crec) + sizeof(char *) - SMALLDNAME)
484:
485: #define F_IMMORTAL (1u<<0)
486: #define F_NAMEP (1u<<1)
487: #define F_REVERSE (1u<<2)
488: #define F_FORWARD (1u<<3)
489: #define F_DHCP (1u<<4)
490: #define F_NEG (1u<<5)
491: #define F_HOSTS (1u<<6)
492: #define F_IPV4 (1u<<7)
493: #define F_IPV6 (1u<<8)
494: #define F_BIGNAME (1u<<9)
495: #define F_NXDOMAIN (1u<<10)
496: #define F_CNAME (1u<<11)
497: #define F_DNSKEY (1u<<12)
498: #define F_CONFIG (1u<<13)
499: #define F_DS (1u<<14)
500: #define F_DNSSECOK (1u<<15)
501: #define F_UPSTREAM (1u<<16)
502: #define F_RRNAME (1u<<17)
503: #define F_SERVER (1u<<18)
504: #define F_QUERY (1u<<19)
505: #define F_NOERR (1u<<20)
506: #define F_AUTH (1u<<21)
507: #define F_DNSSEC (1u<<22)
508: #define F_KEYTAG (1u<<23)
509: #define F_SECSTAT (1u<<24)
510: #define F_NO_RR (1u<<25)
511: #define F_IPSET (1u<<26)
512: #define F_NOEXTRA (1u<<27)
513: #define F_DOMAINSRV (1u<<28)
514: #define F_RCODE (1u<<29)
515: #define F_SRV (1u<<30)
516: #define F_STALE (1u<<31)
517:
518: #define UID_NONE 0
519: /* Values of uid in crecs with F_CONFIG bit set. */
520: #define SRC_CONFIG 1
521: #define SRC_HOSTS 2
522: #define SRC_AH 3
523:
524:
525: /* struct sockaddr is not large enough to hold any address,
526: and specifically not big enough to hold an IPv6 address.
527: Blech. Roll our own. */
528: union mysockaddr {
529: struct sockaddr sa;
530: struct sockaddr_in in;
531: struct sockaddr_in6 in6;
532: };
533:
534: /* bits in flag param to IPv6 callbacks from iface_enumerate() */
535: #define IFACE_TENTATIVE 1
536: #define IFACE_DEPRECATED 2
537: #define IFACE_PERMANENT 4
538:
539:
540: /* The actual values here matter, since we sort on them to get records in the order
541: IPv6 addr, IPv4 addr, all zero return, resolvconf servers, upstream server, no-data return */
542: #define SERV_LITERAL_ADDRESS 1 /* addr is the answer, or NoDATA is the answer, depending on the next four flags */
543: #define SERV_USE_RESOLV 2 /* forward this domain in the normal way */
544: #define SERV_ALL_ZEROS 4 /* return all zeros for A and AAAA */
545: #define SERV_4ADDR 8 /* addr is IPv4 */
546: #define SERV_6ADDR 16 /* addr is IPv6 */
547: #define SERV_HAS_SOURCE 32 /* source address defined */
548: #define SERV_FOR_NODOTS 64 /* server for names with no domain part only */
549: #define SERV_WARNED_RECURSIVE 128 /* avoid warning spam */
550: #define SERV_FROM_DBUS 256 /* 1 if source is DBus */
551: #define SERV_MARK 512 /* for mark-and-delete and log code */
552: #define SERV_WILDCARD 1024 /* domain has leading '*' */
553: #define SERV_FROM_RESOLV 2048 /* 1 for servers from resolv, 0 for command line. */
554: #define SERV_FROM_FILE 4096 /* read from --servers-file */
555: #define SERV_LOOP 8192 /* server causes forwarding loop */
556: #define SERV_DO_DNSSEC 16384 /* Validate DNSSEC when using this server */
557: #define SERV_GOT_TCP 32768 /* Got some data from the TCP connection */
558:
559: struct serverfd {
560: int fd;
561: union mysockaddr source_addr;
562: char interface[IF_NAMESIZE+1];
563: unsigned int ifindex, used, preallocated;
564: struct serverfd *next;
565: };
566:
567: struct randfd {
568: struct server *serv;
569: int fd;
570: unsigned short refcount; /* refcount == 0xffff means overflow record. */
571: };
572:
573: struct randfd_list {
574: struct randfd *rfd;
575: struct randfd_list *next;
576: };
577:
578:
579: struct server {
580: u16 flags, domain_len;
581: char *domain;
582: struct server *next;
583: int serial, arrayposn;
584: int last_server;
585: union mysockaddr addr, source_addr;
586: char interface[IF_NAMESIZE+1];
587: unsigned int ifindex; /* corresponding to interface, above */
588: struct serverfd *sfd;
589: int tcpfd, edns_pktsz;
590: time_t pktsz_reduced;
591: unsigned int queries, failed_queries, nxdomain_replies, retrys;
592: unsigned int query_latency, mma_latency;
593: time_t forwardtime;
594: int forwardcount;
595: #ifdef HAVE_LOOP
596: u32 uid;
597: #endif
598: };
599:
600: /* First four fields must match struct server in next three definitions.. */
601: struct serv_addr4 {
602: u16 flags, domain_len;
603: char *domain;
604: struct server *next;
605: struct in_addr addr;
606: };
607:
608: struct serv_addr6 {
609: u16 flags, domain_len;
610: char *domain;
611: struct server *next;
612: struct in6_addr addr;
613: };
614:
615: struct serv_local {
616: u16 flags, domain_len;
617: char *domain;
618: struct server *next;
619: };
620:
621: struct rebind_domain {
622: char *domain;
623: struct rebind_domain *next;
624: };
625:
626: struct ipsets {
627: char **sets;
628: char *domain;
629: struct ipsets *next;
630: };
631:
632: struct allowlist {
633: u32 mark, mask;
634: char **patterns;
635: struct allowlist *next;
636: };
637:
638: struct irec {
639: union mysockaddr addr;
640: struct in_addr netmask; /* only valid for IPv4 */
641: int tftp_ok, dhcp_ok, mtu, done, warned, dad, dns_auth, index, multicast_done, found, label;
642: char *name;
643: struct irec *next;
644: };
645:
646: struct listener {
647: int fd, tcpfd, tftpfd, used;
648: union mysockaddr addr;
649: struct irec *iface; /* only sometimes valid for non-wildcard */
650: struct listener *next;
651: };
652:
653: /* interface and address parms from command line. */
654: struct iname {
655: char *name;
656: union mysockaddr addr;
657: int used;
658: struct iname *next;
659: };
660:
661: /* subnet parameters from command line */
662: struct mysubnet {
663: union mysockaddr addr;
664: int addr_used;
665: int mask;
666: };
667:
668: /* resolv-file parms from command-line */
669: struct resolvc {
670: struct resolvc *next;
671: int is_default, logged;
672: time_t mtime;
673: ino_t ino;
674: char *name;
675: #ifdef HAVE_INOTIFY
676: int wd; /* inotify watch descriptor */
677: char *file; /* pointer to file part if path */
678: #endif
679: };
680:
681: /* adn-hosts parms from command-line (also dhcp-hostsfile and dhcp-optsfile and dhcp-hostsdir*/
682: #define AH_DIR 1
683: #define AH_INACTIVE 2
684: #define AH_WD_DONE 4
685: #define AH_HOSTS 8
686: #define AH_DHCP_HST 16
687: #define AH_DHCP_OPT 32
688: struct hostsfile {
689: struct hostsfile *next;
690: int flags;
691: char *fname;
692: unsigned int index; /* matches to cache entries for logging */
693: };
694:
695: struct dyndir {
696: struct dyndir *next;
697: struct hostsfile *files;
698: int flags;
699: char *dname;
700: #ifdef HAVE_INOTIFY
701: int wd; /* inotify watch descriptor */
702: #endif
703: };
704:
705: /* packet-dump flags */
706: #define DUMP_QUERY 0x0001
707: #define DUMP_REPLY 0x0002
708: #define DUMP_UP_QUERY 0x0004
709: #define DUMP_UP_REPLY 0x0008
710: #define DUMP_SEC_QUERY 0x0010
711: #define DUMP_SEC_REPLY 0x0020
712: #define DUMP_BOGUS 0x0040
713: #define DUMP_SEC_BOGUS 0x0080
714: #define DUMP_DHCP 0x1000
715: #define DUMP_DHCPV6 0x2000
716: #define DUMP_RA 0x4000
717: #define DUMP_TFTP 0x8000
718:
719: /* DNSSEC status values. */
720: #define STAT_SECURE 0x10000
721: #define STAT_INSECURE 0x20000
722: #define STAT_BOGUS 0x30000
723: #define STAT_NEED_DS 0x40000
724: #define STAT_NEED_KEY 0x50000
725: #define STAT_TRUNCATED 0x60000
726: #define STAT_SECURE_WILDCARD 0x70000
727: #define STAT_OK 0x80000
728: #define STAT_ABANDONED 0x90000
729:
730: #define DNSSEC_FAIL_NYV 0x0001 /* key not yet valid */
731: #define DNSSEC_FAIL_EXP 0x0002 /* key expired */
732: #define DNSSEC_FAIL_INDET 0x0004 /* indetermined */
733: #define DNSSEC_FAIL_NOKEYSUP 0x0008 /* no supported key algo. */
734: #define DNSSEC_FAIL_NOSIG 0x0010 /* No RRsigs */
735: #define DNSSEC_FAIL_NOZONE 0x0020 /* No Zone bit set */
736: #define DNSSEC_FAIL_NONSEC 0x0040 /* No NSEC */
737: #define DNSSEC_FAIL_NODSSUP 0x0080 /* no supported DS algo. */
738: #define DNSSEC_FAIL_NOKEY 0x0100 /* no DNSKEY */
739:
740: #define STAT_ISEQUAL(a, b) (((a) & 0xffff0000) == (b))
741:
742: #define FREC_NOREBIND 1
743: #define FREC_CHECKING_DISABLED 2
744: #define FREC_NO_CACHE 4
745: #define FREC_DNSKEY_QUERY 8
746: #define FREC_DS_QUERY 16
747: #define FREC_AD_QUESTION 32
748: #define FREC_DO_QUESTION 64
749: #define FREC_ADDED_PHEADER 128
750: #define FREC_TEST_PKTSZ 256
751: #define FREC_HAS_EXTRADATA 512
752: #define FREC_HAS_PHEADER 1024
753:
754: #define HASH_SIZE 32 /* SHA-256 digest size */
755:
756: struct frec {
757: struct frec_src {
758: union mysockaddr source;
759: union all_addr dest;
760: unsigned int iface, log_id;
761: int fd;
762: unsigned short orig_id;
763: struct frec_src *next;
764: } frec_src;
765: struct server *sentto; /* NULL means free */
766: struct randfd_list *rfds;
767: unsigned short new_id;
768: int forwardall, flags;
769: time_t time;
770: u32 forward_timestamp;
771: int forward_delay;
772: unsigned char *hash[HASH_SIZE];
773: struct blockdata *stash; /* Saved reply, whilst we validate */
774: size_t stash_len;
775: #ifdef HAVE_DNSSEC
776: int class, work_counter;
777: struct frec *dependent; /* Query awaiting internally-generated DNSKEY or DS query */
778: struct frec *next_dependent; /* list of above. */
779: struct frec *blocking_query; /* Query which is blocking us. */
780: #endif
781: struct frec *next;
782: };
783:
784: /* flags in top of length field for DHCP-option tables */
785: #define OT_ADDR_LIST 0x8000
786: #define OT_RFC1035_NAME 0x4000
787: #define OT_INTERNAL 0x2000
788: #define OT_NAME 0x1000
789: #define OT_CSTRING 0x0800
790: #define OT_DEC 0x0400
791: #define OT_TIME 0x0200
792:
793: /* actions in the daemon->helper RPC */
794: #define ACTION_DEL 1
795: #define ACTION_OLD_HOSTNAME 2
796: #define ACTION_OLD 3
797: #define ACTION_ADD 4
798: #define ACTION_TFTP 5
799: #define ACTION_ARP 6
800: #define ACTION_ARP_DEL 7
801: #define ACTION_RELAY_SNOOP 8
802:
803: #define LEASE_NEW 1 /* newly created */
804: #define LEASE_CHANGED 2 /* modified */
805: #define LEASE_AUX_CHANGED 4 /* CLID or expiry changed */
806: #define LEASE_AUTH_NAME 8 /* hostname came from config, not from client */
807: #define LEASE_USED 16 /* used this DHCPv6 transaction */
808: #define LEASE_NA 32 /* IPv6 no-temporary lease */
809: #define LEASE_TA 64 /* IPv6 temporary lease */
810: #define LEASE_HAVE_HWADDR 128 /* Have set hwaddress */
811: #define LEASE_EXP_CHANGED 256 /* Lease expiry time changed */
812:
813: struct dhcp_lease {
814: int clid_len; /* length of client identifier */
815: unsigned char *clid; /* clientid */
816: char *hostname, *fqdn; /* name from client-hostname option or config */
817: char *old_hostname; /* hostname before it moved to another lease */
818: int flags;
819: time_t expires; /* lease expiry */
820: #ifdef HAVE_BROKEN_RTC
821: unsigned int length;
822: #endif
823: int hwaddr_len, hwaddr_type;
824: unsigned char hwaddr[DHCP_CHADDR_MAX];
825: struct in_addr addr, override, giaddr;
826: unsigned char *extradata;
827: unsigned int extradata_len, extradata_size;
828: int last_interface;
829: int new_interface; /* save possible originated interface */
830: int new_prefixlen; /* and its prefix length */
831: #ifdef HAVE_DHCP6
832: struct in6_addr addr6;
833: unsigned int iaid;
834: struct slaac_address {
835: struct in6_addr addr;
836: time_t ping_time;
837: int backoff; /* zero -> confirmed */
838: struct slaac_address *next;
839: } *slaac_address;
840: int vendorclass_count;
841: #endif
842: struct dhcp_lease *next;
843: };
844:
845: struct dhcp_netid {
846: char *net;
847: struct dhcp_netid *next;
848: };
849:
850: struct dhcp_netid_list {
851: struct dhcp_netid *list;
852: struct dhcp_netid_list *next;
853: };
854:
855: struct tag_if {
856: struct dhcp_netid_list *set;
857: struct dhcp_netid *tag;
858: struct tag_if *next;
859: };
860:
861: struct delay_config {
862: int delay;
863: struct dhcp_netid *netid;
864: struct delay_config *next;
865: };
866:
867: struct hwaddr_config {
868: int hwaddr_len, hwaddr_type;
869: unsigned char hwaddr[DHCP_CHADDR_MAX];
870: unsigned int wildcard_mask;
871: struct hwaddr_config *next;
872: };
873:
874: struct dhcp_config {
875: unsigned int flags;
876: int clid_len; /* length of client identifier */
877: unsigned char *clid; /* clientid */
878: char *hostname, *domain;
879: struct dhcp_netid_list *netid;
880: struct dhcp_netid *filter;
881: #ifdef HAVE_DHCP6
882: struct addrlist *addr6;
883: #endif
884: struct in_addr addr;
885: time_t decline_time;
886: unsigned int lease_time;
887: struct hwaddr_config *hwaddr;
888: struct dhcp_config *next;
889: };
890:
891: #define have_config(config, mask) ((config) && ((config)->flags & (mask)))
892:
893: #define CONFIG_DISABLE 1
894: #define CONFIG_CLID 2
895: #define CONFIG_TIME 8
896: #define CONFIG_NAME 16
897: #define CONFIG_ADDR 32
898: #define CONFIG_NOCLID 128
899: #define CONFIG_FROM_ETHERS 256 /* entry created by /etc/ethers */
900: #define CONFIG_ADDR_HOSTS 512 /* address added by from /etc/hosts */
901: #define CONFIG_DECLINED 1024 /* address declined by client */
902: #define CONFIG_BANK 2048 /* from dhcp hosts file */
903: #define CONFIG_ADDR6 4096
904: #define CONFIG_ADDR6_HOSTS 16384 /* address added by from /etc/hosts */
905:
906: struct dhcp_opt {
907: int opt, len, flags;
908: union {
909: int encap;
910: unsigned int wildcard_mask;
911: unsigned char *vendor_class;
912: } u;
913: unsigned char *val;
914: struct dhcp_netid *netid;
915: struct dhcp_opt *next;
916: };
917:
918: #define DHOPT_ADDR 1
919: #define DHOPT_STRING 2
920: #define DHOPT_ENCAPSULATE 4
921: #define DHOPT_ENCAP_MATCH 8
922: #define DHOPT_FORCE 16
923: #define DHOPT_BANK 32
924: #define DHOPT_ENCAP_DONE 64
925: #define DHOPT_MATCH 128
926: #define DHOPT_VENDOR 256
927: #define DHOPT_HEX 512
928: #define DHOPT_VENDOR_MATCH 1024
929: #define DHOPT_RFC3925 2048
930: #define DHOPT_TAGOK 4096
931: #define DHOPT_ADDR6 8192
932: #define DHOPT_VENDOR_PXE 16384
933:
934: struct dhcp_boot {
935: char *file, *sname, *tftp_sname;
936: struct in_addr next_server;
937: struct dhcp_netid *netid;
938: struct dhcp_boot *next;
939: };
940:
941: struct dhcp_match_name {
942: char *name;
943: int wildcard;
944: struct dhcp_netid *netid;
945: struct dhcp_match_name *next;
946: };
947:
948: struct pxe_service {
949: unsigned short CSA, type;
950: char *menu, *basename, *sname;
951: struct in_addr server;
952: struct dhcp_netid *netid;
953: struct pxe_service *next;
954: };
955:
956: #define DHCP_PXE_DEF_VENDOR "PXEClient"
957:
958: #define MATCH_VENDOR 1
959: #define MATCH_USER 2
960: #define MATCH_CIRCUIT 3
961: #define MATCH_REMOTE 4
962: #define MATCH_SUBSCRIBER 5
963:
964: /* vendorclass, userclass, remote-id or circuit-id */
965: struct dhcp_vendor {
966: int len, match_type;
967: unsigned int enterprise;
968: char *data;
969: struct dhcp_netid netid;
970: struct dhcp_vendor *next;
971: };
972:
973: struct dhcp_pxe_vendor {
974: char *data;
975: struct dhcp_pxe_vendor *next;
976: };
977:
978: struct dhcp_mac {
979: unsigned int mask;
980: int hwaddr_len, hwaddr_type;
981: unsigned char hwaddr[DHCP_CHADDR_MAX];
982: struct dhcp_netid netid;
983: struct dhcp_mac *next;
984: };
985:
986: struct dhcp_bridge {
987: char iface[IF_NAMESIZE];
988: struct dhcp_bridge *alias, *next;
989: };
990:
991: struct cond_domain {
992: char *domain, *prefix; /* prefix is text-prefix on domain name */
993: char *interface; /* These two set when domain comes from interface. */
994: struct addrlist *al;
995: struct in_addr start, end;
996: struct in6_addr start6, end6;
997: int is6, indexed, prefixlen;
998: struct cond_domain *next;
999: };
1000:
1001: struct ra_interface {
1002: char *name;
1003: char *mtu_name;
1004: int interval, lifetime, prio, mtu;
1005: struct ra_interface *next;
1006: };
1007:
1008: struct dhcp_context {
1009: unsigned int lease_time, addr_epoch;
1010: struct in_addr netmask, broadcast;
1011: struct in_addr local, router;
1012: struct in_addr start, end; /* range of available addresses */
1013: #ifdef HAVE_DHCP6
1014: struct in6_addr start6, end6; /* range of available addresses */
1015: struct in6_addr local6;
1016: int prefix, if_index;
1017: unsigned int valid, preferred, saved_valid;
1018: time_t ra_time, ra_short_period_start, address_lost_time;
1019: char *template_interface;
1020: #endif
1021: int flags;
1022: struct dhcp_netid netid, *filter;
1023: struct dhcp_context *next, *current;
1024: };
1025:
1026: struct shared_network {
1027: int if_index;
1028: struct in_addr match_addr, shared_addr;
1029: #ifdef HAVE_DHCP6
1030: /* shared_addr == 0 for IP6 entries. */
1031: struct in6_addr match_addr6, shared_addr6;
1032: #endif
1033: struct shared_network *next;
1034: };
1035:
1036: #define CONTEXT_STATIC (1u<<0)
1037: #define CONTEXT_NETMASK (1u<<1)
1038: #define CONTEXT_BRDCAST (1u<<2)
1039: #define CONTEXT_PROXY (1u<<3)
1040: #define CONTEXT_RA_ROUTER (1u<<4)
1041: #define CONTEXT_RA_DONE (1u<<5)
1042: #define CONTEXT_RA_NAME (1u<<6)
1043: #define CONTEXT_RA_STATELESS (1u<<7)
1044: #define CONTEXT_DHCP (1u<<8)
1045: #define CONTEXT_DEPRECATE (1u<<9)
1046: #define CONTEXT_TEMPLATE (1u<<10) /* create contexts using addresses */
1047: #define CONTEXT_CONSTRUCTED (1u<<11)
1048: #define CONTEXT_GC (1u<<12)
1049: #define CONTEXT_RA (1u<<13)
1050: #define CONTEXT_CONF_USED (1u<<14)
1051: #define CONTEXT_USED (1u<<15)
1052: #define CONTEXT_OLD (1u<<16)
1053: #define CONTEXT_V6 (1u<<17)
1054: #define CONTEXT_RA_OFF_LINK (1u<<18)
1055: #define CONTEXT_SETLEASE (1u<<19)
1056:
1057: struct ping_result {
1058: struct in_addr addr;
1059: time_t time;
1060: unsigned int hash;
1061: struct ping_result *next;
1062: };
1063:
1064: struct tftp_file {
1065: int refcount, fd;
1066: off_t size;
1067: dev_t dev;
1068: ino_t inode;
1069: char filename[];
1070: };
1071:
1072: struct tftp_transfer {
1073: int sockfd;
1074: time_t timeout;
1075: int backoff;
1076: unsigned int block, blocksize, expansion;
1077: off_t offset;
1078: union mysockaddr peer;
1079: union all_addr source;
1080: int if_index;
1081: char opt_blocksize, opt_transize, netascii, carrylf;
1082: struct tftp_file *file;
1083: struct tftp_transfer *next;
1084: };
1085:
1086: struct addr_list {
1087: struct in_addr addr;
1088: struct addr_list *next;
1089: };
1090:
1091: struct tftp_prefix {
1092: char *interface;
1093: char *prefix;
1094: int missing;
1095: struct tftp_prefix *next;
1096: };
1097:
1098: struct dhcp_relay {
1099: union all_addr local, server;
1100: char *interface; /* Allowable interface for replies from server, and dest for IPv6 multicast */
1101: int iface_index; /* working - interface in which requests arrived, for return */
1102: int port; /* Port of relay we forward to. */
1103: #ifdef HAVE_SCRIPT
1104: struct snoop_record {
1105: struct in6_addr client, prefix;
1106: int prefix_len;
1107: struct snoop_record *next;
1108: } *snoop_records;
1109: #endif
1110: struct dhcp_relay *next;
1111: };
1112:
1113: extern struct daemon {
1114: /* datastuctures representing the command-line and
1115: config file arguments. All set (including defaults)
1116: in option.c */
1117:
1118: unsigned int options[OPTION_SIZE];
1119: struct resolvc default_resolv, *resolv_files;
1120: time_t last_resolv;
1121: char *servers_file;
1122: struct mx_srv_record *mxnames;
1123: struct naptr *naptr;
1124: struct txt_record *txt, *rr;
1125: struct ptr_record *ptr;
1126: struct host_record *host_records, *host_records_tail;
1127: struct cname *cnames;
1128: struct auth_zone *auth_zones;
1129: struct interface_name *int_names;
1130: char *mxtarget;
1131: struct mysubnet *add_subnet4;
1132: struct mysubnet *add_subnet6;
1133: char *lease_file;
1134: char *username, *groupname, *scriptuser;
1135: char *luascript;
1136: char *authserver, *hostmaster;
1137: struct iname *authinterface;
1138: struct name_list *secondary_forward_server;
1139: int group_set, osport;
1140: char *domain_suffix;
1141: struct cond_domain *cond_domain, *synth_domains;
1142: char *runfile;
1143: char *lease_change_command;
1144: struct iname *if_names, *if_addrs, *if_except, *dhcp_except, *auth_peers, *tftp_interfaces;
1145: struct bogus_addr *bogus_addr, *ignore_addr;
1146: struct server *servers, *servers_tail, *local_domains, **serverarray;
1147: struct rebind_domain *no_rebind;
1148: int server_has_wildcard;
1149: int serverarraysz, serverarrayhwm;
1150: struct ipsets *ipsets, *nftsets;
1151: u32 allowlist_mask;
1152: struct allowlist *allowlists;
1153: int log_fac; /* log facility */
1154: char *log_file; /* optional log file */
1155: int max_logs; /* queue limit */
1156: int randport_limit; /* Maximum number of source ports for query. */
1157: int cachesize, ftabsize;
1158: int port, query_port, min_port, max_port;
1159: unsigned long local_ttl, neg_ttl, max_ttl, min_cache_ttl, max_cache_ttl, auth_ttl, dhcp_ttl, use_dhcp_ttl;
1160: char *dns_client_id;
1161: u32 umbrella_org;
1162: u32 umbrella_asset;
1163: u8 umbrella_device[8];
1164: int host_index;
1165: struct hostsfile *addn_hosts;
1166: struct dhcp_context *dhcp, *dhcp6;
1167: struct ra_interface *ra_interfaces;
1168: struct dhcp_config *dhcp_conf;
1169: struct dhcp_opt *dhcp_opts, *dhcp_match, *dhcp_opts6, *dhcp_match6;
1170: struct dhcp_match_name *dhcp_name_match;
1171: struct dhcp_pxe_vendor *dhcp_pxe_vendors;
1172: struct dhcp_vendor *dhcp_vendors;
1173: struct dhcp_mac *dhcp_macs;
1174: struct dhcp_boot *boot_config;
1175: struct pxe_service *pxe_services;
1176: struct tag_if *tag_if;
1177: struct addr_list *override_relays;
1178: struct dhcp_relay *relay4, *relay6;
1179: struct delay_config *delay_conf;
1180: int override;
1181: int enable_pxe;
1182: int doing_ra, doing_dhcp6;
1183: struct dhcp_netid_list *dhcp_ignore, *dhcp_ignore_names, *dhcp_gen_names;
1184: struct dhcp_netid_list *force_broadcast, *bootp_dynamic;
1185: struct hostsfile *dhcp_hosts_file, *dhcp_opts_file;
1186: struct dyndir *dynamic_dirs;
1187: int dhcp_max, tftp_max, tftp_mtu;
1188: int dhcp_server_port, dhcp_client_port;
1189: int start_tftp_port, end_tftp_port;
1190: unsigned int min_leasetime;
1191: struct doctor *doctors;
1192: unsigned short edns_pktsz;
1193: char *tftp_prefix;
1194: struct tftp_prefix *if_prefix; /* per-interface TFTP prefixes */
1195: unsigned int duid_enterprise, duid_config_len;
1196: unsigned char *duid_config;
1197: char *dbus_name;
1198: char *ubus_name;
1199: char *dump_file;
1200: int dump_mask;
1201: unsigned long soa_sn, soa_refresh, soa_retry, soa_expiry;
1202: u32 metrics[__METRIC_MAX];
1203: int fast_retry_time, fast_retry_timeout;
1204: int cache_max_expiry;
1205: #ifdef HAVE_DNSSEC
1206: struct ds_config *ds;
1207: char *timestamp_file;
1208: #endif
1209:
1210: /* globally used stuff for DNS */
1211: char *packet; /* packet buffer */
1212: int packet_buff_sz; /* size of above */
1213: char *namebuff; /* MAXDNAME size buffer */
1214: #if (defined(HAVE_CONNTRACK) && defined(HAVE_UBUS)) || defined(HAVE_DNSSEC)
1215: /* CONNTRACK UBUS code uses this buffer, as well as DNSSEC code. */
1216: char *workspacename;
1217: #endif
1218: #ifdef HAVE_DNSSEC
1219: char *keyname; /* MAXDNAME size buffer */
1220: unsigned long *rr_status; /* ceiling in TTL from DNSSEC or zero for insecure */
1221: int rr_status_sz;
1222: int dnssec_no_time_check;
1223: int back_to_the_future;
1224: #endif
1225: struct frec *frec_list;
1226: struct frec_src *free_frec_src;
1227: int frec_src_count;
1228: struct serverfd *sfds;
1229: struct irec *interfaces;
1230: struct listener *listeners;
1231: struct server *srv_save; /* Used for resend on DoD */
1232: size_t packet_len; /* " " */
1233: int fd_save; /* " " */
1234: pid_t tcp_pids[MAX_PROCS];
1235: int tcp_pipes[MAX_PROCS];
1236: int pipe_to_parent;
1237: int numrrand;
1238: struct randfd *randomsocks;
1239: struct randfd_list *rfl_spare, *rfl_poll;
1240: int v6pktinfo;
1241: struct addrlist *interface_addrs; /* list of all addresses/prefix lengths associated with all local interfaces */
1242: int log_id, log_display_id; /* ids of transactions for logging */
1243: union mysockaddr *log_source_addr;
1244:
1245: /* DHCP state */
1246: int dhcpfd, helperfd, pxefd;
1247: #ifdef HAVE_INOTIFY
1248: int inotifyfd;
1249: #endif
1250: #if defined(HAVE_LINUX_NETWORK)
1251: int netlinkfd, kernel_version;
1252: #elif defined(HAVE_BSD_NETWORK)
1253: int dhcp_raw_fd, dhcp_icmp_fd, routefd;
1254: #endif
1255: struct iovec dhcp_packet;
1256: char *dhcp_buff, *dhcp_buff2, *dhcp_buff3;
1257: struct ping_result *ping_results;
1258: FILE *lease_stream;
1259: struct dhcp_bridge *bridges;
1260: struct shared_network *shared_networks;
1261: #ifdef HAVE_DHCP6
1262: int duid_len;
1263: unsigned char *duid;
1264: struct iovec outpacket;
1265: int dhcp6fd, icmp6fd;
1266: # ifdef HAVE_SCRIPT
1267: struct snoop_record *free_snoops;
1268: # endif
1269: #endif
1270:
1271: /* DBus stuff */
1272: /* void * here to avoid depending on dbus headers outside dbus.c */
1273: void *dbus;
1274: #ifdef HAVE_DBUS
1275: struct watch *watches;
1276: #endif
1277:
1278: /* UBus stuff */
1279: #ifdef HAVE_UBUS
1280: /* void * here to avoid depending on ubus headers outside ubus.c */
1281: void *ubus;
1282: #endif
1283:
1284: /* TFTP stuff */
1285: struct tftp_transfer *tftp_trans, *tftp_done_trans;
1286:
1287: /* utility string buffer, hold max sized IP address as string */
1288: char *addrbuff;
1289: char *addrbuff2; /* only allocated when OPT_EXTRALOG */
1290:
1291: #ifdef HAVE_DUMPFILE
1292: /* file for packet dumps. */
1293: int dumpfd;
1294: #endif
1295: } *daemon;
1296:
1297: struct server_details {
1298: union mysockaddr *addr, *source_addr;
1299: struct addrinfo *hostinfo, *orig_hostinfo;
1300: char *interface, *source, *scope_id, *interface_opt;
1301: int serv_port, source_port, addr_type, scope_index, valid;
1302: u16 *flags;
1303: };
1304:
1305: /* cache.c */
1306: void cache_init(void);
1307: void next_uid(struct crec *crecp);
1308: void log_query(unsigned int flags, char *name, union all_addr *addr, char *arg, unsigned short type);
1309: char *record_source(unsigned int index);
1310: int cache_find_non_terminal(char *name, time_t now);
1311: struct crec *cache_find_by_addr(struct crec *crecp,
1312: union all_addr *addr, time_t now,
1313: unsigned int prot);
1314: struct crec *cache_find_by_name(struct crec *crecp,
1315: char *name, time_t now, unsigned int prot);
1316: void cache_end_insert(void);
1317: void cache_start_insert(void);
1318: unsigned int cache_remove_uid(const unsigned int uid);
1319: int cache_recv_insert(time_t now, int fd);
1320: struct crec *cache_insert(char *name, union all_addr *addr, unsigned short class,
1321: time_t now, unsigned long ttl, unsigned int flags);
1322: void cache_reload(void);
1323: void cache_add_dhcp_entry(char *host_name, int prot, union all_addr *host_address, time_t ttd);
1324: struct in_addr a_record_from_hosts(char *name, time_t now);
1325: void cache_unhash_dhcp(void);
1326: void dump_cache(time_t now);
1327: #ifndef NO_ID
1328: int cache_make_stat(struct txt_record *t);
1329: #endif
1330: char *cache_get_name(struct crec *crecp);
1331: char *cache_get_cname_target(struct crec *crecp);
1332: struct crec *cache_enumerate(int init);
1333: int read_hostsfile(char *filename, unsigned int index, int cache_size,
1334: struct crec **rhash, int hashsz);
1335:
1336: /* blockdata.c */
1337: void blockdata_init(void);
1338: void blockdata_report(void);
1339: struct blockdata *blockdata_alloc(char *data, size_t len);
1340: void *blockdata_retrieve(struct blockdata *block, size_t len, void *data);
1341: struct blockdata *blockdata_read(int fd, size_t len);
1342: void blockdata_write(struct blockdata *block, size_t len, int fd);
1343: void blockdata_free(struct blockdata *blocks);
1344:
1345: /* domain.c */
1346: char *get_domain(struct in_addr addr);
1347: char *get_domain6(struct in6_addr *addr);
1348: int is_name_synthetic(int flags, char *name, union all_addr *addr);
1349: int is_rev_synth(int flag, union all_addr *addr, char *name);
1350:
1351: /* rfc1035.c */
1352: int extract_name(struct dns_header *header, size_t plen, unsigned char **pp,
1353: char *name, int isExtract, int extrabytes);
1354: unsigned char *skip_name(unsigned char *ansp, struct dns_header *header, size_t plen, int extrabytes);
1355: unsigned char *skip_questions(struct dns_header *header, size_t plen);
1356: unsigned char *skip_section(unsigned char *ansp, int count, struct dns_header *header, size_t plen);
1357: unsigned int extract_request(struct dns_header *header, size_t qlen,
1358: char *name, unsigned short *typep);
1359: void setup_reply(struct dns_header *header, unsigned int flags, int ede);
1360: int extract_addresses(struct dns_header *header, size_t qlen, char *name,
1361: time_t now, struct ipsets *ipsets, struct ipsets *nftsets, int is_sign,
1362: int check_rebind, int no_cache_dnssec, int secure, int *doctored);
1363: #if defined(HAVE_CONNTRACK) && defined(HAVE_UBUS)
1364: void report_addresses(struct dns_header *header, size_t len, u32 mark);
1365: #endif
1366: size_t answer_request(struct dns_header *header, char *limit, size_t qlen,
1367: struct in_addr local_addr, struct in_addr local_netmask,
1368: time_t now, int ad_reqd, int do_bit, int have_pseudoheader,
1369: int *stale);
1370: int check_for_bogus_wildcard(struct dns_header *header, size_t qlen, char *name,
1371: time_t now);
1372: int check_for_ignored_address(struct dns_header *header, size_t qlen);
1373: int check_for_local_domain(char *name, time_t now);
1374: size_t resize_packet(struct dns_header *header, size_t plen,
1375: unsigned char *pheader, size_t hlen);
1376: int add_resource_record(struct dns_header *header, char *limit, int *truncp,
1377: int nameoffset, unsigned char **pp, unsigned long ttl,
1378: int *offset, unsigned short type, unsigned short class, char *format, ...);
1379: int in_arpa_name_2_addr(char *namein, union all_addr *addrp);
1380: int private_net(struct in_addr addr, int ban_localhost);
1381:
1382: /* auth.c */
1383: #ifdef HAVE_AUTH
1384: size_t answer_auth(struct dns_header *header, char *limit, size_t qlen,
1385: time_t now, union mysockaddr *peer_addr, int local_query,
1386: int do_bit, int have_pseudoheader);
1387: int in_zone(struct auth_zone *zone, char *name, char **cut);
1388: #endif
1389:
1390: /* dnssec.c */
1391: #ifdef HAVE_DNSSEC
1392: size_t dnssec_generate_query(struct dns_header *header, unsigned char *end, char *name, int class, int type, int edns_pktsz);
1393: int dnssec_validate_by_ds(time_t now, struct dns_header *header, size_t plen, char *name, char *keyname, int class);
1394: int dnssec_validate_ds(time_t now, struct dns_header *header, size_t plen, char *name, char *keyname, int class);
1395: int dnssec_validate_reply(time_t now, struct dns_header *header, size_t plen, char *name, char *keyname, int *class,
1396: int check_unsigned, int *neganswer, int *nons, int *nsec_ttl);
1397: int dnskey_keytag(int alg, int flags, unsigned char *key, int keylen);
1398: size_t filter_rrsigs(struct dns_header *header, size_t plen);
1399: int setup_timestamp(void);
1400: int errflags_to_ede(int status);
1401: #endif
1402:
1403: /* hash_questions.c */
1404: void hash_questions_init(void);
1405: unsigned char *hash_questions(struct dns_header *header, size_t plen, char *name);
1406:
1407: /* crypto.c */
1408: const struct nettle_hash *hash_find(char *name);
1409: int hash_init(const struct nettle_hash *hash, void **ctxp, unsigned char **digestp);
1410: int verify(struct blockdata *key_data, unsigned int key_len, unsigned char *sig, size_t sig_len,
1411: unsigned char *digest, size_t digest_len, int algo);
1412: char *ds_digest_name(int digest);
1413: char *algo_digest_name(int algo);
1414: char *nsec3_digest_name(int digest);
1415:
1416: /* util.c */
1417: void rand_init(void);
1418: unsigned short rand16(void);
1419: u32 rand32(void);
1420: u64 rand64(void);
1421: int legal_hostname(char *name);
1422: char *canonicalise(char *in, int *nomem);
1423: unsigned char *do_rfc1035_name(unsigned char *p, char *sval, char *limit);
1424: void *safe_malloc(size_t size);
1425: void safe_strncpy(char *dest, const char *src, size_t size);
1426: void safe_pipe(int *fd, int read_noblock);
1427: void *whine_malloc(size_t size);
1428: void *whine_realloc(void *ptr, size_t size);
1429: int sa_len(union mysockaddr *addr);
1430: int sockaddr_isequal(const union mysockaddr *s1, const union mysockaddr *s2);
1431: int sockaddr_isnull(const union mysockaddr *s);
1432: int hostname_order(const char *a, const char *b);
1433: int hostname_isequal(const char *a, const char *b);
1434: int hostname_issubdomain(char *a, char *b);
1435: time_t dnsmasq_time(void);
1436: u32 dnsmasq_milliseconds(void);
1437: int netmask_length(struct in_addr mask);
1438: int is_same_net(struct in_addr a, struct in_addr b, struct in_addr mask);
1439: int is_same_net_prefix(struct in_addr a, struct in_addr b, int prefix);
1440: int is_same_net6(struct in6_addr *a, struct in6_addr *b, int prefixlen);
1441: u64 addr6part(struct in6_addr *addr);
1442: void setaddr6part(struct in6_addr *addr, u64 host);
1443: int retry_send(ssize_t rc);
1444: void prettyprint_time(char *buf, unsigned int t);
1445: int prettyprint_addr(union mysockaddr *addr, char *buf);
1446: int parse_hex(char *in, unsigned char *out, int maxlen,
1447: unsigned int *wildcard_mask, int *mac_type);
1448: int memcmp_masked(unsigned char *a, unsigned char *b, int len,
1449: unsigned int mask);
1450: int expand_buf(struct iovec *iov, size_t size);
1451: char *print_mac(char *buff, unsigned char *mac, int len);
1452: int read_write(int fd, unsigned char *packet, int size, int rw);
1453: void close_fds(long max_fd, int spare1, int spare2, int spare3);
1454: int wildcard_match(const char* wildcard, const char* match);
1455: int wildcard_matchn(const char* wildcard, const char* match, int num);
1456: #ifdef HAVE_LINUX_NETWORK
1457: int kernel_version(void);
1458: #endif
1459:
1460: /* log.c */
1461: void die(char *message, char *arg1, int exit_code) ATTRIBUTE_NORETURN;
1462: int log_start(struct passwd *ent_pw, int errfd);
1463: int log_reopen(char *log_file);
1464:
1465: void my_syslog(int priority, const char *format, ...);
1466:
1467: void set_log_writer(void);
1468: void check_log_writer(int force);
1469: void flush_log(void);
1470:
1471: /* option.c */
1472: void read_opts (int argc, char **argv, char *compile_opts);
1473: char *option_string(int prot, unsigned int opt, unsigned char *val,
1474: int opt_len, char *buf, int buf_len);
1475: void reread_dhcp(void);
1476: void read_servers_file(void);
1477: void set_option_bool(unsigned int opt);
1478: void reset_option_bool(unsigned int opt);
1479: struct hostsfile *expand_filelist(struct hostsfile *list);
1480: char *parse_server(char *arg, struct server_details *sdetails);
1481: char *parse_server_addr(struct server_details *sdetails);
1482: int parse_server_next(struct server_details *sdetails);
1483: int option_read_dynfile(char *file, int flags);
1484:
1485: /* forward.c */
1486: void reply_query(int fd, time_t now);
1487: void receive_query(struct listener *listen, time_t now);
1488: unsigned char *tcp_request(int confd, time_t now,
1489: union mysockaddr *local_addr, struct in_addr netmask, int auth_dns);
1490: void server_gone(struct server *server);
1491: int send_from(int fd, int nowild, char *packet, size_t len,
1492: union mysockaddr *to, union all_addr *source,
1493: unsigned int iface);
1494: void resend_query(void);
1495: int allocate_rfd(struct randfd_list **fdlp, struct server *serv);
1496: void free_rfds(struct randfd_list **fdlp);
1497: int fast_retry(time_t now);
1498:
1499: /* network.c */
1500: int indextoname(int fd, int index, char *name);
1501: int local_bind(int fd, union mysockaddr *addr, char *intname, unsigned int ifindex, int is_tcp);
1502: void pre_allocate_sfds(void);
1503: int reload_servers(char *fname);
1504: void check_servers(int no_loop_call);
1505: int enumerate_interfaces(int reset);
1506: void create_wildcard_listeners(void);
1507: void create_bound_listeners(int dienow);
1508: void warn_bound_listeners(void);
1509: void warn_wild_labels(void);
1510: void warn_int_names(void);
1511: int is_dad_listeners(void);
1512: int iface_check(int family, union all_addr *addr, char *name, int *auth);
1513: int loopback_exception(int fd, int family, union all_addr *addr, char *name);
1514: int label_exception(int index, int family, union all_addr *addr);
1515: int fix_fd(int fd);
1516: int tcp_interface(int fd, int af);
1517: int set_ipv6pktinfo(int fd);
1518: #ifdef HAVE_DHCP6
1519: void join_multicast(int dienow);
1520: #endif
1521: #if defined(HAVE_LINUX_NETWORK) || defined(HAVE_BSD_NETWORK)
1522: void newaddress(time_t now);
1523: #endif
1524:
1525:
1526: /* dhcp.c */
1527: #ifdef HAVE_DHCP
1528: void dhcp_init(void);
1529: void dhcp_packet(time_t now, int pxe_fd);
1530: struct dhcp_context *address_available(struct dhcp_context *context,
1531: struct in_addr taddr,
1532: struct dhcp_netid *netids);
1533: struct dhcp_context *narrow_context(struct dhcp_context *context,
1534: struct in_addr taddr,
1535: struct dhcp_netid *netids);
1536: struct ping_result *do_icmp_ping(time_t now, struct in_addr addr,
1537: unsigned int hash, int loopback);
1538: int address_allocate(struct dhcp_context *context,
1539: struct in_addr *addrp, unsigned char *hwaddr, int hw_len,
1540: struct dhcp_netid *netids, time_t now, int loopback);
1541: void dhcp_read_ethers(void);
1542: struct dhcp_config *config_find_by_address(struct dhcp_config *configs, struct in_addr addr);
1543: char *host_from_dns(struct in_addr addr);
1544: #endif
1545:
1546: /* lease.c */
1547: #ifdef HAVE_DHCP
1548: void lease_update_file(time_t now);
1549: void lease_update_dns(int force);
1550: void lease_init(time_t now);
1551: struct dhcp_lease *lease4_allocate(struct in_addr addr);
1552: #ifdef HAVE_DHCP6
1553: struct dhcp_lease *lease6_allocate(struct in6_addr *addrp, int lease_type);
1554: struct dhcp_lease *lease6_find(unsigned char *clid, int clid_len,
1555: int lease_type, unsigned int iaid, struct in6_addr *addr);
1556: void lease6_reset(void);
1557: struct dhcp_lease *lease6_find_by_client(struct dhcp_lease *first, int lease_type,
1558: unsigned char *clid, int clid_len, unsigned int iaid);
1559: struct dhcp_lease *lease6_find_by_addr(struct in6_addr *net, int prefix, u64 addr);
1560: u64 lease_find_max_addr6(struct dhcp_context *context);
1561: void lease_ping_reply(struct in6_addr *sender, unsigned char *packet, char *interface);
1562: void lease_update_slaac(time_t now);
1563: void lease_set_iaid(struct dhcp_lease *lease, unsigned int iaid);
1564: void lease_make_duid(time_t now);
1565: #endif
1566: void lease_set_hwaddr(struct dhcp_lease *lease, const unsigned char *hwaddr,
1567: const unsigned char *clid, int hw_len, int hw_type,
1568: int clid_len, time_t now, int force);
1569: void lease_set_hostname(struct dhcp_lease *lease, const char *name, int auth, char *domain, char *config_domain);
1570: void lease_set_expires(struct dhcp_lease *lease, unsigned int len, time_t now);
1571: void lease_set_interface(struct dhcp_lease *lease, int interface, time_t now);
1572: struct dhcp_lease *lease_find_by_client(unsigned char *hwaddr, int hw_len, int hw_type,
1573: unsigned char *clid, int clid_len);
1574: struct dhcp_lease *lease_find_by_addr(struct in_addr addr);
1575: struct in_addr lease_find_max_addr(struct dhcp_context *context);
1576: void lease_prune(struct dhcp_lease *target, time_t now);
1577: void lease_update_from_configs(void);
1578: int do_script_run(time_t now);
1579: void rerun_scripts(void);
1580: void lease_find_interfaces(time_t now);
1581: #ifdef HAVE_SCRIPT
1582: void lease_add_extradata(struct dhcp_lease *lease, unsigned char *data,
1583: unsigned int len, int delim);
1584: #endif
1585: #endif
1586:
1587: /* rfc2131.c */
1588: #ifdef HAVE_DHCP
1589: size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
1590: size_t sz, time_t now, int unicast_dest, int loopback,
1591: int *is_inform, int pxe, struct in_addr fallback, time_t recvtime);
1592: unsigned char *extended_hwaddr(int hwtype, int hwlen, unsigned char *hwaddr,
1593: int clid_len, unsigned char *clid, int *len_out);
1594: #endif
1595:
1596: /* dnsmasq.c */
1597: #ifdef HAVE_DHCP
1598: int make_icmp_sock(void);
1599: int icmp_ping(struct in_addr addr);
1600: int delay_dhcp(time_t start, int sec, int fd, uint32_t addr, unsigned short id);
1601: #endif
1602: void queue_event(int event);
1603: void send_alarm(time_t event, time_t now);
1604: void send_event(int fd, int event, int data, char *msg);
1605: void clear_cache_and_reload(time_t now);
1606:
1607: /* netlink.c */
1608: #ifdef HAVE_LINUX_NETWORK
1609: char *netlink_init(void);
1610: void netlink_multicast(void);
1611: #endif
1612:
1613: /* bpf.c */
1614: #ifdef HAVE_BSD_NETWORK
1615: void init_bpf(void);
1616: void send_via_bpf(struct dhcp_packet *mess, size_t len,
1617: struct in_addr iface_addr, struct ifreq *ifr);
1618: void route_init(void);
1619: void route_sock(void);
1620: #endif
1621:
1622: /* bpf.c or netlink.c */
1623: int iface_enumerate(int family, void *parm, int (callback)());
1624:
1625: /* dbus.c */
1626: #ifdef HAVE_DBUS
1627: char *dbus_init(void);
1628: void check_dbus_listeners(void);
1629: void set_dbus_listeners(void);
1630: # ifdef HAVE_DHCP
1631: void emit_dbus_signal(int action, struct dhcp_lease *lease, char *hostname);
1632: # endif
1633: #endif
1634:
1635: /* ubus.c */
1636: #ifdef HAVE_UBUS
1637: char *ubus_init(void);
1638: void set_ubus_listeners(void);
1639: void check_ubus_listeners(void);
1640: void ubus_event_bcast(const char *type, const char *mac, const char *ip, const char *name, const char *interface);
1641: # ifdef HAVE_CONNTRACK
1642: void ubus_event_bcast_connmark_allowlist_refused(u32 mark, const char *name);
1643: void ubus_event_bcast_connmark_allowlist_resolved(u32 mark, const char *pattern, const char *ip, u32 ttl);
1644: # endif
1645: #endif
1646:
1647: /* ipset.c */
1648: #ifdef HAVE_IPSET
1649: void ipset_init(void);
1650: int add_to_ipset(const char *setname, const union all_addr *ipaddr, int flags, int remove);
1651: #endif
1652:
1653: /* nftset.c */
1654: #ifdef HAVE_NFTSET
1655: void nftset_init(void);
1656: int add_to_nftset(const char *setpath, const union all_addr *ipaddr, int flags, int remove);
1657: #endif
1658:
1659: /* pattern.c */
1660: #ifdef HAVE_CONNTRACK
1661: int is_valid_dns_name(const char *value);
1662: int is_valid_dns_name_pattern(const char *value);
1663: int is_dns_name_matching_pattern(const char *name, const char *pattern);
1664: #endif
1665:
1666: /* helper.c */
1667: #if defined(HAVE_SCRIPT)
1668: int create_helper(int event_fd, int err_fd, uid_t uid, gid_t gid, long max_fd);
1669: void helper_write(void);
1670: void queue_script(int action, struct dhcp_lease *lease,
1671: char *hostname, time_t now);
1672: #ifdef HAVE_TFTP
1673: void queue_tftp(off_t file_len, char *filename, union mysockaddr *peer);
1674: #endif
1675: void queue_arp(int action, unsigned char *mac, int maclen,
1676: int family, union all_addr *addr);
1677: int helper_buf_empty(void);
1678: #ifdef HAVE_DHCP6
1679: void queue_relay_snoop(struct in6_addr *client, int if_index, struct in6_addr *prefix, int prefix_len);
1680: #endif
1681: #endif
1682:
1683: /* tftp.c */
1684: #ifdef HAVE_TFTP
1685: void tftp_request(struct listener *listen, time_t now);
1686: void check_tftp_listeners(time_t now);
1687: int do_tftp_script_run(void);
1688: #endif
1689:
1690: /* conntrack.c */
1691: #ifdef HAVE_CONNTRACK
1692: int get_incoming_mark(union mysockaddr *peer_addr, union all_addr *local_addr,
1693: int istcp, unsigned int *markp);
1694: #endif
1695:
1696: /* dhcp6.c */
1697: #ifdef HAVE_DHCP6
1698: void dhcp6_init(void);
1699: void dhcp6_packet(time_t now);
1700: struct dhcp_context *address6_allocate(struct dhcp_context *context, unsigned char *clid, int clid_len, int temp_addr,
1701: unsigned int iaid, int serial, struct dhcp_netid *netids, int plain_range, struct in6_addr *ans);
1702: struct dhcp_context *address6_available(struct dhcp_context *context,
1703: struct in6_addr *taddr,
1704: struct dhcp_netid *netids,
1705: int plain_range);
1706: struct dhcp_context *address6_valid(struct dhcp_context *context,
1707: struct in6_addr *taddr,
1708: struct dhcp_netid *netids,
1709: int plain_range);
1710: struct dhcp_config *config_find_by_address6(struct dhcp_config *configs, struct in6_addr *net,
1711: int prefix, struct in6_addr *addr);
1712: void make_duid(time_t now);
1713: void dhcp_construct_contexts(time_t now);
1714: void get_client_mac(struct in6_addr *client, int iface, unsigned char *mac,
1715: unsigned int *maclenp, unsigned int *mactypep, time_t now);
1716: #endif
1717:
1718: /* rfc3315.c */
1719: #ifdef HAVE_DHCP6
1720: unsigned short dhcp6_reply(struct dhcp_context *context, int interface, char *iface_name,
1721: struct in6_addr *fallback, struct in6_addr *ll_addr, struct in6_addr *ula_addr,
1722: size_t sz, struct in6_addr *client_addr, time_t now);
1723: int relay_upstream6(int iface_index, ssize_t sz, struct in6_addr *peer_address,
1724: u32 scope_id, time_t now);
1725:
1726: int relay_reply6( struct sockaddr_in6 *peer, ssize_t sz, char *arrival_interface);
1727: # ifdef HAVE_SCRIPT
1728: int do_snoop_script_run(void);
1729: # endif
1730: #endif
1731:
1732: /* dhcp-common.c */
1733: #ifdef HAVE_DHCP
1734: void dhcp_common_init(void);
1735: ssize_t recv_dhcp_packet(int fd, struct msghdr *msg);
1736: struct dhcp_netid *run_tag_if(struct dhcp_netid *tags);
1737: struct dhcp_netid *option_filter(struct dhcp_netid *tags, struct dhcp_netid *context_tags,
1738: struct dhcp_opt *opts);
1739: int match_netid(struct dhcp_netid *check, struct dhcp_netid *pool, int tagnotneeded);
1740: char *strip_hostname(char *hostname);
1741: void log_tags(struct dhcp_netid *netid, u32 xid);
1742: int match_bytes(struct dhcp_opt *o, unsigned char *p, int len);
1743: void dhcp_update_configs(struct dhcp_config *configs);
1744: void display_opts(void);
1745: int lookup_dhcp_opt(int prot, char *name);
1746: int lookup_dhcp_len(int prot, int val);
1747: struct dhcp_config *find_config(struct dhcp_config *configs,
1748: struct dhcp_context *context,
1749: unsigned char *clid, int clid_len,
1750: unsigned char *hwaddr, int hw_len,
1751: int hw_type, char *hostname,
1752: struct dhcp_netid *filter);
1753: int config_has_mac(struct dhcp_config *config, unsigned char *hwaddr, int len, int type);
1754: #ifdef HAVE_LINUX_NETWORK
1755: char *whichdevice(void);
1756: int bind_dhcp_devices(char *bound_device);
1757: #endif
1758: # ifdef HAVE_DHCP6
1759: void display_opts6(void);
1760: # endif
1761: void log_context(int family, struct dhcp_context *context);
1762: void log_relay(int family, struct dhcp_relay *relay);
1763: #endif
1764:
1765: /* outpacket.c */
1766: #ifdef HAVE_DHCP6
1767: void end_opt6(int container);
1768: void reset_counter(void);
1769: int save_counter(int newval);
1770: void *expand(size_t headroom);
1771: int new_opt6(int opt);
1772: void *put_opt6(void *data, size_t len);
1773: void put_opt6_long(unsigned int val);
1774: void put_opt6_short(unsigned int val);
1775: void put_opt6_char(unsigned int val);
1776: void put_opt6_string(char *s);
1777: #endif
1778:
1779: /* radv.c */
1780: #ifdef HAVE_DHCP6
1781: void ra_init(time_t now);
1782: void icmp6_packet(time_t now);
1783: time_t periodic_ra(time_t now);
1784: void ra_start_unsolicited(time_t now, struct dhcp_context *context);
1785: #endif
1786:
1787: /* slaac.c */
1788: #ifdef HAVE_DHCP6
1789: void slaac_add_addrs(struct dhcp_lease *lease, time_t now, int force);
1790: time_t periodic_slaac(time_t now, struct dhcp_lease *leases);
1791: void slaac_ping_reply(struct in6_addr *sender, unsigned char *packet, char *interface, struct dhcp_lease *leases);
1792: #endif
1793:
1794: /* loop.c */
1795: #ifdef HAVE_LOOP
1796: void loop_send_probes(void);
1797: int detect_loop(char *query, int type);
1798: #endif
1799:
1800: /* inotify.c */
1801: #ifdef HAVE_INOTIFY
1802: void inotify_dnsmasq_init(void);
1803: int inotify_check(time_t now);
1804: void set_dynamic_inotify(int flag, int total_size, struct crec **rhash, int revhashsz);
1805: #endif
1806:
1807: /* poll.c */
1808: void poll_reset(void);
1809: int poll_check(int fd, short event);
1810: void poll_listen(int fd, short event);
1811: int do_poll(int timeout);
1812:
1813: /* rrfilter.c */
1814: size_t rrfilter(struct dns_header *header, size_t plen, int mode);
1815: u16 *rrfilter_desc(int type);
1816: int expand_workspace(unsigned char ***wkspc, int *szp, int new);
1817: /* modes. */
1818: #define RRFILTER_EDNS0 0
1819: #define RRFILTER_DNSSEC 1
1820: #define RRFILTER_A 2
1821: #define RRFILTER_AAAA 3
1822: /* edns0.c */
1823: unsigned char *find_pseudoheader(struct dns_header *header, size_t plen,
1824: size_t *len, unsigned char **p, int *is_sign, int *is_last);
1825: size_t add_pseudoheader(struct dns_header *header, size_t plen, unsigned char *limit,
1826: unsigned short udp_sz, int optno, unsigned char *opt, size_t optlen, int set_do, int replace);
1827: size_t add_do_bit(struct dns_header *header, size_t plen, unsigned char *limit);
1828: size_t add_edns0_config(struct dns_header *header, size_t plen, unsigned char *limit,
1829: union mysockaddr *source, time_t now, int *cacheable);
1830: int check_source(struct dns_header *header, size_t plen, unsigned char *pseudoheader, union mysockaddr *peer);
1831:
1832: /* arp.c */
1833: int find_mac(union mysockaddr *addr, unsigned char *mac, int lazy, time_t now);
1834: int do_arp_script_run(void);
1835:
1836: /* dump.c */
1837: #ifdef HAVE_DUMPFILE
1838: void dump_init(void);
1839: void dump_packet_udp(int mask, void *packet, size_t len, union mysockaddr *src,
1840: union mysockaddr *dst, int fd);
1841: void dump_packet_icmp(int mask, void *packet, size_t len, union mysockaddr *src,
1842: union mysockaddr *dst);
1843: #endif
1844:
1845: /* domain-match.c */
1846: void build_server_array(void);
1847: int lookup_domain(char *qdomain, int flags, int *lowout, int *highout);
1848: int filter_servers(int seed, int flags, int *lowout, int *highout);
1849: int is_local_answer(time_t now, int first, char *name);
1850: size_t make_local_answer(int flags, int gotname, size_t size, struct dns_header *header,
1851: char *name, char *limit, int first, int last, int ede);
1852: int server_samegroup(struct server *a, struct server *b);
1853: #ifdef HAVE_DNSSEC
1854: int dnssec_server(struct server *server, char *keyname, int *firstp, int *lastp);
1855: #endif
1856: void mark_servers(int flag);
1857: void cleanup_servers(void);
1858: int add_update_server(int flags,
1859: union mysockaddr *addr,
1860: union mysockaddr *source_addr,
1861: const char *interface,
1862: const char *domain,
1863: union all_addr *local_addr);
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