source: src/router/dnsmasq/src/dnsmasq.h @ 31703

Last change on this file since 31703 was 31703, checked in by brainslayer, 2 months ago

latest dnsmasq

File size: 46.9 KB
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1/* dnsmasq is Copyright (c) 2000-2016 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) 2000-2016 Simon Kelley"
18
19#ifndef NO_LARGEFILE
20/* Ensure we can use files >2GB (log files may grow this big) */
21#  define _LARGEFILE_SOURCE 1
22#  define _FILE_OFFSET_BITS 64
23#endif
24
25/* Get linux C library versions and define _GNU_SOURCE for kFreeBSD. */
26#if defined(__linux__) || defined(__GLIBC__)
27#  ifndef __ANDROID__
28#      define _GNU_SOURCE
29#  endif
30#  include <features.h>
31#endif
32
33/* Need these defined early */
34#if defined(__sun) || defined(__sun__)
35#  define _XPG4_2
36#  define __EXTENSIONS__
37#endif
38
39/* get these before config.h  for IPv6 stuff... */
40#include <sys/types.h>
41#include <sys/socket.h>
42
43#ifdef __APPLE__
44/* Define before netinet/in.h to select API. OSX Lion onwards. */
45#  define __APPLE_USE_RFC_3542
46#endif
47#include <netinet/in.h>
48
49/* Also needed before config.h. */
50#include <getopt.h>
51
52#include "config.h"
53#include "ip6addr.h"
54
55typedef unsigned char u8;
56typedef unsigned short u16;
57typedef unsigned int u32;
58typedef unsigned long long u64;
59
60#define countof(x)      (long)(sizeof(x) / sizeof(x[0]))
61#define MIN(a,b)        ((a) < (b) ? (a) : (b))
62
63#include "dns-protocol.h"
64#include "dhcp-protocol.h"
65#ifdef HAVE_DHCP6
66#include "dhcp6-protocol.h"
67#include "radv-protocol.h"
68#endif
69
70#define gettext_noop(S) (S)
71#ifndef LOCALEDIR
72#  define _(S) (S)
73#else
74#  include <libintl.h>
75#  include <locale.h>   
76#  define _(S) gettext(S)
77#endif
78
79#include <arpa/inet.h>
80#include <sys/stat.h>
81#include <sys/ioctl.h>
82#if defined(HAVE_SOLARIS_NETWORK)
83#  include <sys/sockio.h>
84#endif
85#include <sys/poll.h>
86#include <sys/wait.h>
87#include <sys/time.h>
88#include <sys/un.h>
89#include <limits.h>
90#include <net/if.h>
91#if defined(HAVE_SOLARIS_NETWORK) && !defined(ifr_mtu)
92/* Some solaris net/if./h omit this. */
93#  define ifr_mtu  ifr_ifru.ifru_metric
94#endif
95#include <unistd.h>
96#include <stdio.h>
97#include <string.h>
98#include <stdlib.h>
99#include <fcntl.h>
100#include <ctype.h>
101#include <signal.h>
102#include <stddef.h>
103#include <time.h>
104#include <errno.h>
105#include <pwd.h>
106#include <grp.h>
107#include <stdarg.h>
108#if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__sun__) || defined (__sun) || defined (__ANDROID__)
109#  include <netinet/if_ether.h>
110#else
111#  include <net/ethernet.h>
112#endif
113#include <net/if_arp.h>
114#include <netinet/in_systm.h>
115#include <netinet/ip.h>
116#include <netinet/ip_icmp.h>
117#include <sys/uio.h>
118#include <syslog.h>
119#include <dirent.h>
120#include <utime.h>
121#ifndef HAVE_LINUX_NETWORK
122#  include <net/if_dl.h>
123#endif
124
125#if defined(HAVE_LINUX_NETWORK)
126#include <linux/capability.h>
127/* There doesn't seem to be a universally-available
128   userspace header for these. */
129extern int capset(cap_user_header_t header, cap_user_data_t data);
130extern int capget(cap_user_header_t header, cap_user_data_t data);
131#define LINUX_CAPABILITY_VERSION_1  0x19980330
132#define LINUX_CAPABILITY_VERSION_2  0x20071026
133#define LINUX_CAPABILITY_VERSION_3  0x20080522
134
135#include <sys/prctl.h>
136#elif defined(HAVE_SOLARIS_NETWORK)
137#include <priv.h>
138#endif
139
140/* daemon is function in the C library.... */
141#define daemon dnsmasq_daemon
142
143/* Async event queue */
144struct event_desc {
145  int event, data, msg_sz;
146};
147
148#define EVENT_RELOAD    1
149#define EVENT_DUMP      2
150#define EVENT_ALARM     3
151#define EVENT_TERM      4
152#define EVENT_CHILD     5
153#define EVENT_REOPEN    6
154#define EVENT_EXITED    7
155#define EVENT_KILLED    8
156#define EVENT_EXEC_ERR  9
157#define EVENT_PIPE_ERR  10
158#define EVENT_USER_ERR  11
159#define EVENT_CAP_ERR   12
160#define EVENT_PIDFILE   13
161#define EVENT_HUSER_ERR 14
162#define EVENT_GROUP_ERR 15
163#define EVENT_DIE       16
164#define EVENT_LOG_ERR   17
165#define EVENT_FORK_ERR  18
166#define EVENT_LUA_ERR   19
167#define EVENT_TFTP_ERR  20
168#define EVENT_INIT      21
169#define EVENT_NEWADDR   22
170#define EVENT_NEWROUTE  23
171#define EVENT_TIME_ERR  24
172
173/* Exit codes. */
174#define EC_GOOD        0
175#define EC_BADCONF     1
176#define EC_BADNET      2
177#define EC_FILE        3
178#define EC_NOMEM       4
179#define EC_MISC        5
180#define EC_INIT_OFFSET 10
181
182/* Trust the compiler dead-code eliminator.... */
183#define option_bool(x) (((x) < 32) ? daemon->options & (1u << (x)) : daemon->options2 & (1u << ((x) - 32)))
184
185#define OPT_BOGUSPRIV      0
186#define OPT_FILTER         1
187#define OPT_LOG            2
188#define OPT_SELFMX         3
189#define OPT_NO_HOSTS       4
190#define OPT_NO_POLL        5
191#define OPT_DEBUG          6
192#define OPT_ORDER          7
193#define OPT_NO_RESOLV      8
194#define OPT_EXPAND         9
195#define OPT_LOCALMX        10
196#define OPT_NO_NEG         11
197#define OPT_NODOTS_LOCAL   12
198#define OPT_NOWILD         13
199#define OPT_ETHERS         14
200#define OPT_RESOLV_DOMAIN  15
201#define OPT_NO_FORK        16
202#define OPT_AUTHORITATIVE  17
203#define OPT_LOCALISE       18
204#define OPT_DBUS           19
205#define OPT_DHCP_FQDN      20
206#define OPT_NO_PING        21
207#define OPT_LEASE_RO       22
208#define OPT_ALL_SERVERS    23
209#define OPT_RELOAD         24
210#define OPT_LOCAL_REBIND   25 
211#define OPT_TFTP_SECURE    26
212#define OPT_TFTP_NOBLOCK   27
213#define OPT_LOG_OPTS       28
214#define OPT_TFTP_APREF     29
215#define OPT_NO_OVERRIDE    30
216#define OPT_NO_REBIND      31
217#define OPT_ADD_MAC        32
218#define OPT_DNSSEC_PROXY   33
219#define OPT_CONSEC_ADDR    34
220#define OPT_CONNTRACK      35
221#define OPT_FQDN_UPDATE    36
222#define OPT_RA             37
223#define OPT_TFTP_LC        38
224#define OPT_CLEVERBIND     39
225#define OPT_TFTP           40
226#define OPT_CLIENT_SUBNET  41
227#define OPT_QUIET_DHCP     42
228#define OPT_QUIET_DHCP6    43
229#define OPT_QUIET_RA       44
230#define OPT_DNSSEC_VALID   45
231#define OPT_DNSSEC_TIME    46
232#define OPT_DNSSEC_DEBUG   47
233#define OPT_DNSSEC_NO_SIGN 48
234#define OPT_LOCAL_SERVICE  49
235#define OPT_LOOP_DETECT    50
236#define OPT_EXTRALOG       51
237#define OPT_TFTP_NO_FAIL   52
238#define OPT_SCRIPT_ARP     53
239#define OPT_MAC_B64        54
240#define OPT_MAC_HEX        55
241#define OPT_LAST           56
242
243/* extra flags for my_syslog, we use a couple of facilities since they are known
244   not to occupy the same bits as priorities, no matter how syslog.h is set up. */
245#define MS_TFTP LOG_USER
246#define MS_DHCP LOG_DAEMON
247
248struct all_addr {
249  union {
250    struct in_addr addr4;
251#ifdef HAVE_IPV6
252    struct in6_addr addr6;
253#endif
254    /* for log_query */
255    struct {
256      unsigned short keytag, algo, digest;
257    } log;
258    /* for cache_insert of DNSKEY, DS */
259    struct {
260      unsigned short class, type;
261    } dnssec;     
262  } addr;
263};
264
265struct bogus_addr {
266  struct in_addr addr;
267  struct bogus_addr *next;
268};
269
270/* dns doctor param */
271struct doctor {
272  struct in_addr in, end, out, mask;
273  struct doctor *next;
274};
275
276struct mx_srv_record {
277  char *name, *target;
278  int issrv, srvport, priority, weight;
279  unsigned int offset;
280  struct mx_srv_record *next;
281};
282
283struct naptr {
284  char *name, *replace, *regexp, *services, *flags;
285  unsigned int order, pref;
286  struct naptr *next;
287};
288
289#ifndef NO_ID
290#define TXT_STAT_CACHESIZE     1
291#define TXT_STAT_INSERTS       2
292#define TXT_STAT_EVICTIONS     3
293#define TXT_STAT_MISSES        4
294#define TXT_STAT_HITS          5
295#define TXT_STAT_AUTH          6
296#define TXT_STAT_SERVERS       7
297#endif
298
299struct txt_record {
300  char *name;
301  unsigned char *txt;
302  unsigned short class, len;
303  int stat;
304  struct txt_record *next;
305};
306
307struct ptr_record {
308  char *name, *ptr;
309  struct ptr_record *next;
310};
311
312struct cname {
313  int ttl, flag;
314  char *alias, *target;
315  struct cname *next, *targetp;
316};
317
318struct ds_config {
319  char *name, *digest;
320  int digestlen, class, algo, keytag, digest_type;
321  struct ds_config *next;
322};
323
324#define ADDRLIST_LITERAL 1
325#define ADDRLIST_IPV6    2
326#define ADDRLIST_REVONLY 4
327
328struct addrlist {
329  struct all_addr addr;
330  int flags, prefixlen;
331  struct addrlist *next;
332};
333
334#define AUTH6     1
335#define AUTH4     2
336
337struct auth_zone {
338  char *domain;
339  struct auth_name_list {
340    char *name;
341    int flags;
342    struct auth_name_list *next;
343  } *interface_names;
344  struct addrlist *subnet;
345  struct addrlist *exclude;
346  struct auth_zone *next;
347};
348
349
350struct host_record {
351  int ttl;
352  struct name_list {
353    char *name;
354    struct name_list *next;
355  } *names;
356  struct in_addr addr;
357#ifdef HAVE_IPV6
358  struct in6_addr addr6;
359#endif
360  struct host_record *next;
361};
362
363struct interface_name {
364  char *name; /* domain name */
365  char *intr; /* interface name */
366  int family; /* AF_INET, AF_INET6 or zero for both */
367  struct addrlist *addr;
368  struct interface_name *next;
369};
370
371union bigname {
372  char name[MAXDNAME+1];
373  union bigname *next; /* freelist */
374};
375
376struct blockdata {
377  struct blockdata *next;
378  unsigned char key[KEYBLOCK_LEN];
379};
380
381struct crec {
382  struct crec *next, *prev, *hash_next;
383  /* union is 16 bytes when doing IPv6, 8 bytes on 32 bit machines without IPv6 */
384  union {
385    struct all_addr addr;
386    struct {
387      union {
388        struct crec *cache;
389        struct interface_name *int_name;
390      } target;
391      unsigned int uid; /* 0 if union is interface-name */
392    } cname;
393    struct {
394      struct blockdata *keydata;
395      unsigned short keylen, flags, keytag;
396      unsigned char algo;
397    } key;
398    struct {
399      struct blockdata *keydata;
400      unsigned short keylen, keytag;
401      unsigned char algo;
402      unsigned char digest;
403    } ds;
404  } addr;
405  time_t ttd; /* time to die */
406  /* used as class if DNSKEY/DS, index to source for F_HOSTS */
407  unsigned int uid;
408  unsigned short flags;
409  union {
410    char sname[SMALLDNAME+1];
411    union bigname *bname;
412    char *namep;
413  } name;
414};
415
416#define F_IMMORTAL  (1u<<0)
417#define F_NAMEP     (1u<<1)
418#define F_REVERSE   (1u<<2)
419#define F_FORWARD   (1u<<3)
420#define F_DHCP      (1u<<4)
421#define F_NEG       (1u<<5)       
422#define F_HOSTS     (1u<<6)
423#define F_IPV4      (1u<<7)
424#define F_IPV6      (1u<<8)
425#define F_BIGNAME   (1u<<9)
426#define F_NXDOMAIN  (1u<<10)
427#define F_CNAME     (1u<<11)
428#define F_DNSKEY    (1u<<12)
429#define F_CONFIG    (1u<<13)
430#define F_DS        (1u<<14)
431#define F_DNSSECOK  (1u<<15)
432
433/* below here are only valid as args to log_query: cache
434   entries are limited to 16 bits */
435#define F_UPSTREAM  (1u<<16)
436#define F_RRNAME    (1u<<17)
437#define F_SERVER    (1u<<18)
438#define F_QUERY     (1u<<19)
439#define F_NOERR     (1u<<20)
440#define F_AUTH      (1u<<21)
441#define F_DNSSEC    (1u<<22)
442#define F_KEYTAG    (1u<<23)
443#define F_SECSTAT   (1u<<24)
444#define F_NO_RR     (1u<<25)
445#define F_IPSET     (1u<<26)
446#define F_NOEXTRA   (1u<<27)
447
448/* Values of uid in crecs with F_CONFIG bit set. */
449#define SRC_INTERFACE 0
450#define SRC_CONFIG    1
451#define SRC_HOSTS     2
452#define SRC_AH        3
453
454
455/* struct sockaddr is not large enough to hold any address,
456   and specifically not big enough to hold an IPv6 address.
457   Blech. Roll our own. */
458union mysockaddr {
459  struct sockaddr sa;
460  struct sockaddr_in in;
461#if defined(HAVE_IPV6)
462  struct sockaddr_in6 in6;
463#endif
464};
465
466/* bits in flag param to IPv6 callbacks from iface_enumerate() */
467#define IFACE_TENTATIVE   1
468#define IFACE_DEPRECATED  2
469#define IFACE_PERMANENT   4
470
471
472#define SERV_FROM_RESOLV       1  /* 1 for servers from resolv, 0 for command line. */
473#define SERV_NO_ADDR           2  /* no server, this domain is local only */
474#define SERV_LITERAL_ADDRESS   4  /* addr is the answer, not the server */
475#define SERV_HAS_DOMAIN        8  /* server for one domain only */
476#define SERV_HAS_SOURCE       16  /* source address defined */
477#define SERV_FOR_NODOTS       32  /* server for names with no domain part only */
478#define SERV_WARNED_RECURSIVE 64  /* avoid warning spam */
479#define SERV_FROM_DBUS       128  /* 1 if source is DBus */
480#define SERV_MARK            256  /* for mark-and-delete */
481#define SERV_TYPE    (SERV_HAS_DOMAIN | SERV_FOR_NODOTS)
482#define SERV_COUNTED         512  /* workspace for log code */
483#define SERV_USE_RESOLV     1024  /* forward this domain in the normal way */
484#define SERV_NO_REBIND      2048  /* inhibit dns-rebind protection */
485#define SERV_FROM_FILE      4096  /* read from --servers-file */
486#define SERV_LOOP           8192  /* server causes forwarding loop */
487#define SERV_DO_DNSSEC     16384  /* Validate DNSSEC when using this server */
488#define SERV_GOT_TCP       32768  /* Got some data from the TCP connection */
489
490struct serverfd {
491  int fd;
492  union mysockaddr source_addr;
493  char interface[IF_NAMESIZE+1];
494  unsigned int ifindex, used;
495  struct serverfd *next;
496};
497
498struct randfd {
499  int fd;
500  unsigned short refcount, family;
501};
502 
503struct server {
504  union mysockaddr addr, source_addr;
505  char interface[IF_NAMESIZE+1];
506  struct serverfd *sfd;
507  char *domain; /* set if this server only handles a domain. */
508  int flags, tcpfd, edns_pktsz;
509  unsigned int queries, failed_queries;
510#ifdef HAVE_LOOP
511  u32 uid;
512#endif
513  struct server *next;
514};
515
516struct ipsets {
517  char **sets;
518  char *domain;
519  struct ipsets *next;
520};
521
522struct irec {
523  union mysockaddr addr;
524  struct in_addr netmask; /* only valid for IPv4 */
525  int tftp_ok, dhcp_ok, mtu, done, warned, dad, dns_auth, index, multicast_done, found, label;
526  char *name;
527  struct irec *next;
528};
529
530struct listener {
531  int fd, tcpfd, tftpfd, family;
532  struct irec *iface; /* only sometimes valid for non-wildcard */
533  struct listener *next;
534};
535
536/* interface and address parms from command line. */
537struct iname {
538  char *name;
539  union mysockaddr addr;
540  int used;
541  struct iname *next;
542};
543
544/* subnet parameters from command line */
545struct mysubnet {
546  union mysockaddr addr;
547  int addr_used;
548  int mask;
549};
550
551/* resolv-file parms from command-line */
552struct resolvc {
553  struct resolvc *next;
554  int is_default, logged;
555  time_t mtime;
556  char *name;
557#ifdef HAVE_INOTIFY
558  int wd; /* inotify watch descriptor */
559  char *file; /* pointer to file part if path */
560#endif
561};
562
563/* adn-hosts parms from command-line (also dhcp-hostsfile and dhcp-optsfile and dhcp-hostsdir*/
564#define AH_DIR      1
565#define AH_INACTIVE 2
566#define AH_WD_DONE  4
567#define AH_HOSTS    8
568#define AH_DHCP_HST 16
569#define AH_DHCP_OPT 32
570struct hostsfile {
571  struct hostsfile *next;
572  int flags;
573  char *fname;
574#ifdef HAVE_INOTIFY
575  int wd; /* inotify watch descriptor */
576#endif
577  unsigned int index; /* matches to cache entries for logging */
578};
579
580
581/* DNSSEC status values. */
582#define STAT_SECURE             1
583#define STAT_INSECURE           2
584#define STAT_BOGUS              3
585#define STAT_NEED_DS            4
586#define STAT_NEED_KEY           5
587#define STAT_TRUNCATED          6
588#define STAT_SECURE_WILDCARD    7
589#define STAT_OK                 8
590#define STAT_ABANDONED          9
591
592#define FREC_NOREBIND           1
593#define FREC_CHECKING_DISABLED  2
594#define FREC_HAS_SUBNET         4
595#define FREC_DNSKEY_QUERY       8
596#define FREC_DS_QUERY          16
597#define FREC_AD_QUESTION       32
598#define FREC_DO_QUESTION       64
599#define FREC_ADDED_PHEADER    128
600#define FREC_TEST_PKTSZ       256
601#define FREC_HAS_EXTRADATA    512       
602
603#ifdef HAVE_DNSSEC
604#define HASH_SIZE 20 /* SHA-1 digest size */
605#else
606#define HASH_SIZE sizeof(int)
607#endif
608
609struct frec {
610  union mysockaddr source;
611  struct all_addr dest;
612  struct server *sentto; /* NULL means free */
613  struct randfd *rfd4;
614#ifdef HAVE_IPV6
615  struct randfd *rfd6;
616#endif
617  unsigned int iface;
618  unsigned short orig_id, new_id;
619  int log_id, fd, forwardall, flags;
620  time_t time;
621  unsigned char *hash[HASH_SIZE];
622#ifdef HAVE_DNSSEC
623  int class, work_counter;
624  struct blockdata *stash; /* Saved reply, whilst we validate */
625  size_t stash_len;
626  struct frec *dependent; /* Query awaiting internally-generated DNSKEY or DS query */
627  struct frec *blocking_query; /* Query which is blocking us. */
628#endif
629  struct frec *next;
630};
631
632/* flags in top of length field for DHCP-option tables */
633#define OT_ADDR_LIST    0x8000
634#define OT_RFC1035_NAME 0x4000
635#define OT_INTERNAL     0x2000
636#define OT_NAME         0x1000
637#define OT_CSTRING      0x0800
638#define OT_DEC          0x0400
639#define OT_TIME         0x0200
640
641/* actions in the daemon->helper RPC */
642#define ACTION_DEL           1
643#define ACTION_OLD_HOSTNAME  2
644#define ACTION_OLD           3
645#define ACTION_ADD           4
646#define ACTION_TFTP          5
647#define ACTION_ARP           6
648#define ACTION_ARP_DEL       7
649
650#define LEASE_NEW            1  /* newly created */
651#define LEASE_CHANGED        2  /* modified */
652#define LEASE_AUX_CHANGED    4  /* CLID or expiry changed */
653#define LEASE_AUTH_NAME      8  /* hostname came from config, not from client */
654#define LEASE_USED          16  /* used this DHCPv6 transaction */
655#define LEASE_NA            32  /* IPv6 no-temporary lease */
656#define LEASE_TA            64  /* IPv6 temporary lease */
657#define LEASE_HAVE_HWADDR  128  /* Have set hwaddress */
658
659struct dhcp_lease {
660  int clid_len;          /* length of client identifier */
661  unsigned char *clid;   /* clientid */
662  char *hostname, *fqdn; /* name from client-hostname option or config */
663  char *old_hostname;    /* hostname before it moved to another lease */
664  int flags;
665  time_t expires;        /* lease expiry */
666#ifdef HAVE_BROKEN_RTC
667  unsigned int length;
668#endif
669  int hwaddr_len, hwaddr_type;
670  unsigned char hwaddr[DHCP_CHADDR_MAX];
671  struct in_addr addr, override, giaddr;
672  unsigned char *extradata;
673  unsigned int extradata_len, extradata_size;
674  int last_interface;
675  int new_interface;     /* save possible originated interface */
676  int new_prefixlen;     /* and its prefix length */
677#ifdef HAVE_DHCP6
678  struct in6_addr addr6;
679  int iaid;
680  struct slaac_address {
681    struct in6_addr addr;
682    time_t ping_time;
683    int backoff; /* zero -> confirmed */
684    struct slaac_address *next;
685  } *slaac_address;
686  int vendorclass_count;
687#endif
688  struct dhcp_lease *next;
689};
690
691struct dhcp_netid {
692  char *net;
693  struct dhcp_netid *next;
694};
695
696struct dhcp_netid_list {
697  struct dhcp_netid *list;
698  struct dhcp_netid_list *next;
699};
700
701struct tag_if {
702  struct dhcp_netid_list *set;
703  struct dhcp_netid *tag;
704  struct tag_if *next;
705};
706
707struct hwaddr_config {
708  int hwaddr_len, hwaddr_type;
709  unsigned char hwaddr[DHCP_CHADDR_MAX];
710  unsigned int wildcard_mask;
711  struct hwaddr_config *next;
712};
713
714struct dhcp_config {
715  unsigned int flags;
716  int clid_len;          /* length of client identifier */
717  unsigned char *clid;   /* clientid */
718  char *hostname, *domain;
719  struct dhcp_netid_list *netid;
720#ifdef HAVE_DHCP6
721  struct in6_addr addr6;
722#endif
723  struct in_addr addr;
724  time_t decline_time;
725  unsigned int lease_time;
726  struct hwaddr_config *hwaddr;
727  struct dhcp_config *next;
728};
729
730#define have_config(config, mask) ((config) && ((config)->flags & (mask)))
731
732#define CONFIG_DISABLE           1
733#define CONFIG_CLID              2
734#define CONFIG_TIME              8
735#define CONFIG_NAME             16
736#define CONFIG_ADDR             32
737#define CONFIG_NOCLID          128
738#define CONFIG_FROM_ETHERS     256    /* entry created by /etc/ethers */
739#define CONFIG_ADDR_HOSTS      512    /* address added by from /etc/hosts */
740#define CONFIG_DECLINED       1024    /* address declined by client */
741#define CONFIG_BANK           2048    /* from dhcp hosts file */
742#define CONFIG_ADDR6          4096
743#define CONFIG_WILDCARD       8192
744
745struct dhcp_opt {
746  int opt, len, flags;
747  union {
748    int encap;
749    unsigned int wildcard_mask;
750    unsigned char *vendor_class;
751  } u;
752  unsigned char *val;
753  struct dhcp_netid *netid;
754  struct dhcp_opt *next;
755};
756
757#define DHOPT_ADDR               1
758#define DHOPT_STRING             2
759#define DHOPT_ENCAPSULATE        4
760#define DHOPT_ENCAP_MATCH        8
761#define DHOPT_FORCE             16
762#define DHOPT_BANK              32
763#define DHOPT_ENCAP_DONE        64
764#define DHOPT_MATCH            128
765#define DHOPT_VENDOR           256
766#define DHOPT_HEX              512
767#define DHOPT_VENDOR_MATCH    1024
768#define DHOPT_RFC3925         2048
769#define DHOPT_TAGOK           4096
770#define DHOPT_ADDR6           8192
771
772struct dhcp_boot {
773  char *file, *sname, *tftp_sname;
774  struct in_addr next_server;
775  struct dhcp_netid *netid;
776  struct dhcp_boot *next;
777};
778
779struct pxe_service {
780  unsigned short CSA, type;
781  char *menu, *basename, *sname;
782  struct in_addr server;
783  struct dhcp_netid *netid;
784  struct pxe_service *next;
785};
786
787#define MATCH_VENDOR     1
788#define MATCH_USER       2
789#define MATCH_CIRCUIT    3
790#define MATCH_REMOTE     4
791#define MATCH_SUBSCRIBER 5
792
793/* vendorclass, userclass, remote-id or circuit-id */
794struct dhcp_vendor {
795  int len, match_type;
796  unsigned int enterprise;
797  char *data;
798  struct dhcp_netid netid;
799  struct dhcp_vendor *next;
800};
801
802struct dhcp_mac {
803  unsigned int mask;
804  int hwaddr_len, hwaddr_type;
805  unsigned char hwaddr[DHCP_CHADDR_MAX];
806  struct dhcp_netid netid;
807  struct dhcp_mac *next;
808};
809
810struct dhcp_bridge {
811  char iface[IF_NAMESIZE];
812  struct dhcp_bridge *alias, *next;
813};
814
815struct cond_domain {
816  char *domain, *prefix;
817  struct in_addr start, end;
818#ifdef HAVE_IPV6
819  struct in6_addr start6, end6;
820#endif
821  int is6;
822  struct cond_domain *next;
823};
824
825#ifdef OPTION6_PREFIX_CLASS
826struct prefix_class {
827  int class;
828  struct dhcp_netid tag;
829  struct prefix_class *next;
830};
831#endif
832
833struct ra_interface {
834  char *name;
835  int interval, lifetime, prio;
836  struct ra_interface *next;
837};
838
839struct dhcp_context {
840  unsigned int lease_time, addr_epoch;
841  struct in_addr netmask, broadcast;
842  struct in_addr local, router;
843  struct in_addr start, end; /* range of available addresses */
844#ifdef HAVE_DHCP6
845  struct in6_addr start6, end6; /* range of available addresses */
846  struct in6_addr local6;
847  int prefix, if_index;
848  unsigned int valid, preferred, saved_valid;
849  time_t ra_time, ra_short_period_start, address_lost_time;
850  char *template_interface;
851#endif
852  int flags;
853  struct dhcp_netid netid, *filter;
854  struct dhcp_context *next, *current;
855};
856
857#define CONTEXT_STATIC         (1u<<0)
858#define CONTEXT_NETMASK        (1u<<1)
859#define CONTEXT_BRDCAST        (1u<<2)
860#define CONTEXT_PROXY          (1u<<3)
861#define CONTEXT_RA_ROUTER      (1u<<4)
862#define CONTEXT_RA_DONE        (1u<<5)
863#define CONTEXT_RA_NAME        (1u<<6)
864#define CONTEXT_RA_STATELESS   (1u<<7)
865#define CONTEXT_DHCP           (1u<<8)
866#define CONTEXT_DEPRECATE      (1u<<9)
867#define CONTEXT_TEMPLATE       (1u<<10)    /* create contexts using addresses */
868#define CONTEXT_CONSTRUCTED    (1u<<11)
869#define CONTEXT_GC             (1u<<12)
870#define CONTEXT_RA             (1u<<13)
871#define CONTEXT_CONF_USED      (1u<<14)
872#define CONTEXT_USED           (1u<<15)
873#define CONTEXT_OLD            (1u<<16)
874#define CONTEXT_V6             (1u<<17)
875#define CONTEXT_RA_OFF_LINK    (1u<<18)
876
877struct ping_result {
878  struct in_addr addr;
879  time_t time;
880  unsigned int hash;
881  struct ping_result *next;
882};
883
884struct tftp_file {
885  int refcount, fd;
886  off_t size;
887  dev_t dev;
888  ino_t inode;
889  char filename[];
890};
891
892struct tftp_transfer {
893  int sockfd;
894  time_t timeout;
895  int backoff;
896  unsigned int block, blocksize, expansion;
897  off_t offset;
898  union mysockaddr peer;
899  char opt_blocksize, opt_transize, netascii, carrylf;
900  struct tftp_file *file;
901  struct tftp_transfer *next;
902};
903
904struct addr_list {
905  struct in_addr addr;
906  struct addr_list *next;
907};
908
909struct tftp_prefix {
910  char *interface;
911  char *prefix;
912  int missing;
913  struct tftp_prefix *next;
914};
915
916struct dhcp_relay {
917  struct all_addr local, server;
918  char *interface; /* Allowable interface for replies from server, and dest for IPv6 multicast */
919  int iface_index; /* working - interface in which requests arrived, for return */
920  struct dhcp_relay *current, *next;
921};
922
923extern struct daemon {
924  /* datastuctures representing the command-line and
925     config file arguments. All set (including defaults)
926     in option.c */
927
928  unsigned int options, options2;
929  struct resolvc default_resolv, *resolv_files;
930  time_t last_resolv;
931  char *servers_file;
932  struct mx_srv_record *mxnames;
933  struct naptr *naptr;
934  struct txt_record *txt, *rr;
935  struct ptr_record *ptr;
936  struct host_record *host_records, *host_records_tail;
937  struct cname *cnames;
938  struct auth_zone *auth_zones;
939  struct interface_name *int_names;
940  char *mxtarget;
941  struct mysubnet *add_subnet4;
942  struct mysubnet *add_subnet6;
943  char *lease_file;
944  char *username, *groupname, *scriptuser;
945  char *luascript;
946  char *authserver, *hostmaster;
947  struct iname *authinterface;
948  struct name_list *secondary_forward_server;
949  int group_set, osport;
950  char *domain_suffix;
951  struct cond_domain *cond_domain, *synth_domains;
952  char *runfile;
953  char *lease_change_command;
954  struct iname *if_names, *if_addrs, *if_except, *dhcp_except, *auth_peers, *tftp_interfaces;
955  struct bogus_addr *bogus_addr, *ignore_addr;
956  struct server *servers;
957  struct ipsets *ipsets;
958  int log_fac; /* log facility */
959  char *log_file; /* optional log file */
960  int max_logs;  /* queue limit */
961  int cachesize, ftabsize;
962  int port, query_port, min_port, max_port;
963  unsigned long local_ttl, neg_ttl, max_ttl, min_cache_ttl, max_cache_ttl, auth_ttl, dhcp_ttl, use_dhcp_ttl;
964  char *dns_client_id;
965  struct hostsfile *addn_hosts;
966  struct dhcp_context *dhcp, *dhcp6;
967  struct ra_interface *ra_interfaces;
968  struct dhcp_config *dhcp_conf;
969  struct dhcp_opt *dhcp_opts, *dhcp_match, *dhcp_opts6, *dhcp_match6;
970  struct dhcp_vendor *dhcp_vendors;
971  struct dhcp_mac *dhcp_macs;
972  struct dhcp_boot *boot_config;
973  struct pxe_service *pxe_services;
974  struct tag_if *tag_if;
975  struct addr_list *override_relays;
976  struct dhcp_relay *relay4, *relay6;
977  int override;
978  int enable_pxe;
979  int doing_ra, doing_dhcp6;
980  struct dhcp_netid_list *dhcp_ignore, *dhcp_ignore_names, *dhcp_gen_names;
981  struct dhcp_netid_list *force_broadcast, *bootp_dynamic;
982  struct hostsfile *dhcp_hosts_file, *dhcp_opts_file, *dynamic_dirs;
983  int dhcp_max, tftp_max, tftp_mtu;
984  int dhcp_server_port, dhcp_client_port;
985  int start_tftp_port, end_tftp_port;
986  unsigned int min_leasetime;
987  struct doctor *doctors;
988  unsigned short edns_pktsz;
989  char *tftp_prefix;
990  struct tftp_prefix *if_prefix; /* per-interface TFTP prefixes */
991  unsigned int duid_enterprise, duid_config_len;
992  unsigned char *duid_config;
993  char *dbus_name;
994  unsigned long soa_sn, soa_refresh, soa_retry, soa_expiry;
995#ifdef OPTION6_PREFIX_CLASS
996  struct prefix_class *prefix_classes;
997#endif
998#ifdef HAVE_DNSSEC
999  struct ds_config *ds;
1000  int dnssec_no_time_check;
1001  int back_to_the_future;
1002  char *timestamp_file;
1003#endif
1004
1005  /* globally used stuff for DNS */
1006  char *packet; /* packet buffer */
1007  int packet_buff_sz; /* size of above */
1008  char *namebuff; /* MAXDNAME size buffer */
1009#ifdef HAVE_DNSSEC
1010  char *keyname; /* MAXDNAME size buffer */
1011  char *workspacename; /* ditto */
1012#endif
1013  unsigned int local_answer, queries_forwarded, auth_answer;
1014  struct frec *frec_list;
1015  struct serverfd *sfds;
1016  struct irec *interfaces;
1017  struct listener *listeners;
1018  struct server *last_server;
1019  time_t forwardtime;
1020  int forwardcount;
1021  struct server *srv_save; /* Used for resend on DoD */
1022  size_t packet_len;       /*      "        "        */
1023  struct randfd *rfd_save; /*      "        "        */
1024  pid_t tcp_pids[MAX_PROCS];
1025  struct randfd randomsocks[RANDOM_SOCKS];
1026  int v6pktinfo;
1027  struct addrlist *interface_addrs; /* list of all addresses/prefix lengths associated with all local interfaces */
1028  int log_id, log_display_id; /* ids of transactions for logging */
1029  union mysockaddr *log_source_addr;
1030
1031  /* DHCP state */
1032  int dhcpfd, helperfd, pxefd;
1033#ifdef HAVE_INOTIFY
1034  int inotifyfd;
1035#endif
1036#if defined(HAVE_LINUX_NETWORK)
1037  int netlinkfd;
1038#elif defined(HAVE_BSD_NETWORK)
1039  int dhcp_raw_fd, dhcp_icmp_fd, routefd;
1040#endif
1041  struct iovec dhcp_packet;
1042  char *dhcp_buff, *dhcp_buff2, *dhcp_buff3;
1043  struct ping_result *ping_results;
1044  FILE *lease_stream;
1045  struct dhcp_bridge *bridges;
1046#ifdef HAVE_DHCP6
1047  int duid_len;
1048  unsigned char *duid;
1049  struct iovec outpacket;
1050  int dhcp6fd, icmp6fd;
1051#endif
1052  /* DBus stuff */
1053  /* void * here to avoid depending on dbus headers outside dbus.c */
1054  void *dbus;
1055#ifdef HAVE_DBUS
1056  struct watch *watches;
1057#endif
1058
1059  /* TFTP stuff */
1060  struct tftp_transfer *tftp_trans, *tftp_done_trans;
1061
1062  /* utility string buffer, hold max sized IP address as string */
1063  char *addrbuff;
1064  char *addrbuff2; /* only allocated when OPT_EXTRALOG */
1065
1066} *daemon;
1067
1068/* cache.c */
1069void cache_init(void);
1070void log_query(unsigned int flags, char *name, struct all_addr *addr, char *arg);
1071char *record_source(unsigned int index);
1072char *querystr(char *desc, unsigned short type);
1073struct crec *cache_find_by_addr(struct crec *crecp,
1074                                struct all_addr *addr, time_t now,
1075                                unsigned int prot);
1076struct crec *cache_find_by_name(struct crec *crecp,
1077                                char *name, time_t now, unsigned int prot);
1078void cache_end_insert(void);
1079void cache_start_insert(void);
1080struct crec *cache_insert(char *name, struct all_addr *addr,
1081                          time_t now, unsigned long ttl, unsigned short flags);
1082void cache_reload(void);
1083void cache_add_dhcp_entry(char *host_name, int prot, struct all_addr *host_address, time_t ttd);
1084struct in_addr a_record_from_hosts(char *name, time_t now);
1085void cache_unhash_dhcp(void);
1086void dump_cache(time_t now);
1087#ifndef NO_ID
1088int cache_make_stat(struct txt_record *t);
1089#endif
1090char *cache_get_name(struct crec *crecp);
1091char *cache_get_cname_target(struct crec *crecp);
1092struct crec *cache_enumerate(int init);
1093int read_hostsfile(char *filename, unsigned int index, int cache_size,
1094                   struct crec **rhash, int hashsz);
1095
1096/* blockdata.c */
1097#ifdef HAVE_DNSSEC
1098void blockdata_init(void);
1099void blockdata_report(void);
1100struct blockdata *blockdata_alloc(char *data, size_t len);
1101void *blockdata_retrieve(struct blockdata *block, size_t len, void *data);
1102void blockdata_free(struct blockdata *blocks);
1103#endif
1104
1105/* domain.c */
1106char *get_domain(struct in_addr addr);
1107#ifdef HAVE_IPV6
1108char *get_domain6(struct in6_addr *addr);
1109#endif
1110int is_name_synthetic(int flags, char *name, struct all_addr *addr);
1111int is_rev_synth(int flag, struct all_addr *addr, char *name);
1112
1113/* rfc1035.c */
1114int extract_name(struct dns_header *header, size_t plen, unsigned char **pp,
1115                 char *name, int isExtract, int extrabytes);
1116unsigned char *skip_name(unsigned char *ansp, struct dns_header *header, size_t plen, int extrabytes);
1117unsigned char *skip_questions(struct dns_header *header, size_t plen);
1118unsigned char *skip_section(unsigned char *ansp, int count, struct dns_header *header, size_t plen);
1119unsigned int extract_request(struct dns_header *header, size_t qlen,
1120                               char *name, unsigned short *typep);
1121size_t setup_reply(struct dns_header *header, size_t  qlen,
1122                   struct all_addr *addrp, unsigned int flags,
1123                   unsigned long local_ttl);
1124int extract_addresses(struct dns_header *header, size_t qlen, char *namebuff,
1125                      time_t now, char **ipsets, int is_sign, int checkrebind,
1126                      int no_cache, int secure, int *doctored);
1127size_t answer_request(struct dns_header *header, char *limit, size_t qlen, 
1128                      struct in_addr local_addr, struct in_addr local_netmask,
1129                      time_t now, int ad_reqd, int do_bit, int have_pseudoheader);
1130int check_for_bogus_wildcard(struct dns_header *header, size_t qlen, char *name,
1131                             struct bogus_addr *addr, time_t now);
1132int check_for_ignored_address(struct dns_header *header, size_t qlen, struct bogus_addr *baddr);
1133int check_for_local_domain(char *name, time_t now);
1134unsigned int questions_crc(struct dns_header *header, size_t plen, char *buff);
1135size_t resize_packet(struct dns_header *header, size_t plen,
1136                  unsigned char *pheader, size_t hlen);
1137int add_resource_record(struct dns_header *header, char *limit, int *truncp,
1138                        int nameoffset, unsigned char **pp, unsigned long ttl,
1139                        int *offset, unsigned short type, unsigned short class, char *format, ...);
1140unsigned char *skip_questions(struct dns_header *header, size_t plen);
1141int extract_name(struct dns_header *header, size_t plen, unsigned char **pp,
1142                 char *name, int isExtract, int extrabytes);
1143int in_arpa_name_2_addr(char *namein, struct all_addr *addrp);
1144int private_net(struct in_addr addr, int ban_localhost);
1145
1146/* auth.c */
1147#ifdef HAVE_AUTH
1148size_t answer_auth(struct dns_header *header, char *limit, size_t qlen,
1149                   time_t now, union mysockaddr *peer_addr, int local_query,
1150                   int do_bit, int have_pseudoheader);
1151int in_zone(struct auth_zone *zone, char *name, char **cut);
1152#endif
1153
1154/* dnssec.c */
1155size_t dnssec_generate_query(struct dns_header *header, unsigned char *end, char *name, int class, int type, union mysockaddr *addr, int edns_pktsz);
1156int dnssec_validate_by_ds(time_t now, struct dns_header *header, size_t n, char *name, char *keyname, int class);
1157int dnssec_validate_ds(time_t now, struct dns_header *header, size_t plen, char *name, char *keyname, int class);
1158int dnssec_validate_reply(time_t now, struct dns_header *header, size_t plen, char *name, char *keyname, int *class,
1159                          int check_unsigned, int *neganswer, int *nons);
1160int dnskey_keytag(int alg, int flags, unsigned char *rdata, int rdlen);
1161size_t filter_rrsigs(struct dns_header *header, size_t plen);
1162unsigned char* hash_questions(struct dns_header *header, size_t plen, char *name);
1163int setup_timestamp(void);
1164
1165/* util.c */
1166void rand_init(void);
1167unsigned short rand16(void);
1168u32 rand32(void);
1169u64 rand64(void);
1170int legal_hostname(char *c);
1171char *canonicalise(char *s, int *nomem);
1172unsigned char *do_rfc1035_name(unsigned char *p, char *sval);
1173void *safe_malloc(size_t size);
1174void safe_pipe(int *fd, int read_noblock);
1175void *whine_malloc(size_t size);
1176int sa_len(union mysockaddr *addr);
1177int sockaddr_isequal(union mysockaddr *s1, union mysockaddr *s2);
1178int hostname_isequal(const char *a, const char *b);
1179time_t dnsmasq_time(void);
1180int netmask_length(struct in_addr mask);
1181int is_same_net(struct in_addr a, struct in_addr b, struct in_addr mask);
1182#ifdef HAVE_IPV6
1183int is_same_net6(struct in6_addr *a, struct in6_addr *b, int prefixlen);
1184u64 addr6part(struct in6_addr *addr);
1185void setaddr6part(struct in6_addr *addr, u64 host);
1186#endif
1187int retry_send(ssize_t rc);
1188void prettyprint_time(char *buf, unsigned int t);
1189int prettyprint_addr(union mysockaddr *addr, char *buf);
1190int parse_hex(char *in, unsigned char *out, int maxlen,
1191              unsigned int *wildcard_mask, int *mac_type);
1192int memcmp_masked(unsigned char *a, unsigned char *b, int len,
1193                  unsigned int mask);
1194int expand_buf(struct iovec *iov, size_t size);
1195char *print_mac(char *buff, unsigned char *mac, int len);
1196int read_write(int fd, unsigned char *packet, int size, int rw);
1197
1198int wildcard_match(const char* wildcard, const char* match);
1199int wildcard_matchn(const char* wildcard, const char* match, int num);
1200
1201/* log.c */
1202#ifdef NEED_PRINTF
1203void die(char *message, char *arg1, int exit_code);
1204int log_start(struct passwd *ent_pw, int errfd);
1205int log_reopen(char *log_file);
1206void my_syslog(int priority, const char *format, ...);
1207void set_log_writer(void);
1208void check_log_writer(int force);
1209void flush_log(void);
1210#else
1211#define my_syslog(prio,fmt,...) do {  } while(0)
1212#define die(message, a, exit_code) exit(exit_code)
1213static int inline log_start(struct passwd *ent_pw, int errfd) {
1214return 0;
1215}
1216#define log_reopen(file)  do {  } while(0)
1217#define set_log_writer()  do {  } while(0)
1218#define check_log_writer(set)  do {  } while(0)
1219#define flush_log()  do {  } while(0)
1220#endif
1221/* option.c */
1222void read_opts (int argc, char **argv, char *compile_opts);
1223char *option_string(int prot, unsigned int opt, unsigned char *val,
1224                    int opt_len, char *buf, int buf_len);
1225void reread_dhcp(void);
1226void read_servers_file(void);
1227void set_option_bool(unsigned int opt);
1228void reset_option_bool(unsigned int opt);
1229struct hostsfile *expand_filelist(struct hostsfile *list);
1230char *parse_server(char *arg, union mysockaddr *addr,
1231                   union mysockaddr *source_addr, char *interface, int *flags);
1232int option_read_dynfile(char *file, int flags);
1233
1234/* forward.c */
1235void reply_query(int fd, int family, time_t now);
1236void receive_query(struct listener *listen, time_t now);
1237unsigned char *tcp_request(int confd, time_t now,
1238                           union mysockaddr *local_addr, struct in_addr netmask, int auth_dns);
1239void server_gone(struct server *server);
1240struct frec *get_new_frec(time_t now, int *wait, int force);
1241int send_from(int fd, int nowild, char *packet, size_t len,
1242               union mysockaddr *to, struct all_addr *source,
1243               unsigned int iface);
1244void resend_query();
1245struct randfd *allocate_rfd(int family);
1246void free_rfd(struct randfd *rfd);
1247
1248/* network.c */
1249int indextoname(int fd, int index, char *name);
1250int local_bind(int fd, union mysockaddr *addr, char *intname, int is_tcp);
1251int random_sock(int family);
1252void pre_allocate_sfds(void);
1253int reload_servers(char *fname);
1254void mark_servers(int flag);
1255void cleanup_servers(void);
1256void add_update_server(int flags,
1257                       union mysockaddr *addr,
1258                       union mysockaddr *source_addr,
1259                       const char *interface,
1260                       const char *domain);
1261void check_servers(void);
1262int enumerate_interfaces(int reset);
1263void create_wildcard_listeners(void);
1264void create_bound_listeners(int die);
1265void warn_bound_listeners(void);
1266void warn_wild_labels(void);
1267void warn_int_names(void);
1268int is_dad_listeners(void);
1269int iface_check(int family, struct all_addr *addr, char *name, int *auth_dns);
1270int loopback_exception(int fd, int family, struct all_addr *addr, char *name);
1271int label_exception(int index, int family, struct all_addr *addr);
1272int fix_fd(int fd);
1273int tcp_interface(int fd, int af);
1274#ifdef HAVE_IPV6
1275int set_ipv6pktinfo(int fd);
1276#endif
1277#ifdef HAVE_DHCP6
1278void join_multicast(int dienow);
1279#endif
1280#if defined(HAVE_LINUX_NETWORK) || defined(HAVE_BSD_NETWORK)
1281void newaddress(time_t now);
1282#endif
1283
1284
1285/* dhcp.c */
1286#ifdef HAVE_DHCP
1287void dhcp_init(void);
1288void dhcp_packet(time_t now, int pxe_fd);
1289struct dhcp_context *address_available(struct dhcp_context *context,
1290                                       struct in_addr addr,
1291                                       struct dhcp_netid *netids);
1292struct dhcp_context *narrow_context(struct dhcp_context *context,
1293                                    struct in_addr taddr,
1294                                    struct dhcp_netid *netids);
1295int address_allocate(struct dhcp_context *context,
1296                     struct in_addr *addrp, unsigned char *hwaddr, int hw_len,
1297                     struct dhcp_netid *netids, time_t now);
1298void dhcp_read_ethers(void);
1299struct dhcp_config *config_find_by_address(struct dhcp_config *configs, struct in_addr addr);
1300char *host_from_dns(struct in_addr addr);
1301#endif
1302
1303/* lease.c */
1304#ifdef HAVE_DHCP
1305void lease_update_file(time_t now);
1306void lease_update_dns(int force);
1307void lease_init(time_t now);
1308struct dhcp_lease *lease4_allocate(struct in_addr addr);
1309#ifdef HAVE_DHCP6
1310struct dhcp_lease *lease6_allocate(struct in6_addr *addrp, int lease_type);
1311struct dhcp_lease *lease6_find(unsigned char *clid, int clid_len,
1312                               int lease_type, int iaid, struct in6_addr *addr);
1313void lease6_reset(void);
1314struct dhcp_lease *lease6_find_by_client(struct dhcp_lease *first, int lease_type, unsigned char *clid, int clid_len, int iaid);
1315struct dhcp_lease *lease6_find_by_addr(struct in6_addr *net, int prefix, u64 addr);
1316u64 lease_find_max_addr6(struct dhcp_context *context);
1317void lease_ping_reply(struct in6_addr *sender, unsigned char *packet, char *interface);
1318void lease_update_slaac(time_t now);
1319void lease_set_iaid(struct dhcp_lease *lease, int iaid);
1320void lease_make_duid(time_t now);
1321#endif
1322void lease_set_hwaddr(struct dhcp_lease *lease, const unsigned char *hwaddr,
1323                      const unsigned char *clid, int hw_len, int hw_type,
1324                      int clid_len, time_t now, int force);
1325void lease_set_hostname(struct dhcp_lease *lease, const char *name, int auth, char *domain, char *config_domain);
1326void lease_set_expires(struct dhcp_lease *lease, unsigned int len, time_t now);
1327void lease_set_interface(struct dhcp_lease *lease, int interface, time_t now);
1328struct dhcp_lease *lease_find_by_client(unsigned char *hwaddr, int hw_len, int hw_type, 
1329                                        unsigned char *clid, int clid_len);
1330struct dhcp_lease *lease_find_by_addr(struct in_addr addr);
1331struct in_addr lease_find_max_addr(struct dhcp_context *context);
1332void lease_prune(struct dhcp_lease *target, time_t now);
1333void lease_update_from_configs(void);
1334int do_script_run(time_t now);
1335void rerun_scripts(void);
1336void lease_find_interfaces(time_t now);
1337#ifdef HAVE_SCRIPT
1338void lease_add_extradata(struct dhcp_lease *lease, unsigned char *data,
1339                         unsigned int len, int delim);
1340#endif
1341#endif
1342
1343/* rfc2131.c */
1344#ifdef HAVE_DHCP
1345size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
1346                  size_t sz, time_t now, int unicast_dest, int *is_inform, int pxe_fd, struct in_addr fallback);
1347unsigned char *extended_hwaddr(int hwtype, int hwlen, unsigned char *hwaddr,
1348                               int clid_len, unsigned char *clid, int *len_out);
1349#endif
1350
1351/* dnsmasq.c */
1352#ifdef HAVE_DHCP
1353int make_icmp_sock(void);
1354int icmp_ping(struct in_addr addr);
1355#endif
1356void queue_event(int event);
1357void send_alarm(time_t event, time_t now);
1358void send_event(int fd, int event, int data, char *msg);
1359void clear_cache_and_reload(time_t now);
1360
1361/* netlink.c */
1362#ifdef HAVE_LINUX_NETWORK
1363void netlink_init(void);
1364void netlink_multicast(void);
1365#endif
1366
1367/* bpf.c */
1368#ifdef HAVE_BSD_NETWORK
1369void init_bpf(void);
1370void send_via_bpf(struct dhcp_packet *mess, size_t len,
1371                  struct in_addr iface_addr, struct ifreq *ifr);
1372void route_init(void);
1373void route_sock(void);
1374#endif
1375
1376/* bpf.c or netlink.c */
1377int iface_enumerate(int family, void *parm, int (callback)());
1378
1379/* dbus.c */
1380#ifdef HAVE_DBUS
1381char *dbus_init(void);
1382void check_dbus_listeners(void);
1383void set_dbus_listeners(void);
1384#  ifdef HAVE_DHCP
1385void emit_dbus_signal(int action, struct dhcp_lease *lease, char *hostname);
1386#  endif
1387#endif
1388
1389/* ipset.c */
1390#ifdef HAVE_IPSET
1391void ipset_init(void);
1392int add_to_ipset(const char *setname, const struct all_addr *ipaddr, int flags, int remove);
1393#endif
1394
1395/* helper.c */
1396#if defined(HAVE_SCRIPT)
1397int create_helper(int event_fd, int err_fd, uid_t uid, gid_t gid, long max_fd);
1398void helper_write(void);
1399void queue_script(int action, struct dhcp_lease *lease,
1400                  char *hostname, time_t now);
1401#ifdef HAVE_TFTP
1402void queue_tftp(off_t file_len, char *filename, union mysockaddr *peer);
1403#endif
1404void queue_arp(int action, unsigned char *mac, int maclen,
1405               int family, struct all_addr *addr);
1406int helper_buf_empty(void);
1407#endif
1408
1409/* tftp.c */
1410#ifdef HAVE_TFTP
1411void tftp_request(struct listener *listen, time_t now);
1412void check_tftp_listeners(time_t now);
1413int do_tftp_script_run(void);
1414#endif
1415
1416/* conntrack.c */
1417#ifdef HAVE_CONNTRACK
1418int get_incoming_mark(union mysockaddr *peer_addr, struct all_addr *local_addr,
1419                      int istcp, unsigned int *markp);
1420#endif
1421
1422/* dhcp6.c */
1423#ifdef HAVE_DHCP6
1424void dhcp6_init(void);
1425void dhcp6_packet(time_t now);
1426struct dhcp_context *address6_allocate(struct dhcp_context *context,  unsigned char *clid, int clid_len, int temp_addr,
1427                                       int iaid, int serial, struct dhcp_netid *netids, int plain_range, struct in6_addr *ans);
1428int config_valid(struct dhcp_config *config, struct dhcp_context *context, struct in6_addr *addr);
1429struct dhcp_context *address6_available(struct dhcp_context *context,
1430                                        struct in6_addr *taddr,
1431                                        struct dhcp_netid *netids,
1432                                        int plain_range);
1433struct dhcp_context *address6_valid(struct dhcp_context *context,
1434                                    struct in6_addr *taddr,
1435                                    struct dhcp_netid *netids,
1436                                    int plain_range);
1437struct dhcp_config *config_find_by_address6(struct dhcp_config *configs, struct in6_addr *net,
1438                                            int prefix, u64 addr);
1439void make_duid(time_t now);
1440void dhcp_construct_contexts(time_t now);
1441void get_client_mac(struct in6_addr *client, int iface, unsigned char *mac,
1442                    unsigned int *maclenp, unsigned int *mactypep, time_t now);
1443#endif
1444 
1445/* rfc3315.c */
1446#ifdef HAVE_DHCP6
1447unsigned short dhcp6_reply(struct dhcp_context *context, int interface, char *iface_name, 
1448                           struct in6_addr *fallback, struct in6_addr *ll_addr, struct in6_addr *ula_addr,
1449                           size_t sz, struct in6_addr *client_addr, time_t now);
1450void relay_upstream6(struct dhcp_relay *relay, ssize_t sz, struct in6_addr *peer_address,
1451                     u32 scope_id, time_t now);
1452
1453unsigned short relay_reply6( struct sockaddr_in6 *peer, ssize_t sz, char *arrival_interface);
1454#endif
1455
1456/* dhcp-common.c */
1457#ifdef HAVE_DHCP
1458void dhcp_common_init(void);
1459ssize_t recv_dhcp_packet(int fd, struct msghdr *msg);
1460struct dhcp_netid *run_tag_if(struct dhcp_netid *input);
1461struct dhcp_netid *option_filter(struct dhcp_netid *tags, struct dhcp_netid *context_tags,
1462                                 struct dhcp_opt *opts);
1463int match_netid(struct dhcp_netid *check, struct dhcp_netid *pool, int negonly);
1464char *strip_hostname(char *hostname);
1465void log_tags(struct dhcp_netid *netid, u32 xid);
1466int match_bytes(struct dhcp_opt *o, unsigned char *p, int len);
1467void dhcp_update_configs(struct dhcp_config *configs);
1468void display_opts(void);
1469int lookup_dhcp_opt(int prot, char *name);
1470int lookup_dhcp_len(int prot, int val);
1471char *option_string(int prot, unsigned int opt, unsigned char *val,
1472                    int opt_len, char *buf, int buf_len);
1473struct dhcp_config *find_config(struct dhcp_config *configs,
1474                                struct dhcp_context *context,
1475                                unsigned char *clid, int clid_len,
1476                                unsigned char *hwaddr, int hw_len,
1477                                int hw_type, char *hostname);
1478int config_has_mac(struct dhcp_config *config, unsigned char *hwaddr, int len, int type);
1479#ifdef HAVE_LINUX_NETWORK
1480char *whichdevice(void);
1481void bindtodevice(char *device, int fd);
1482#endif
1483#  ifdef HAVE_DHCP6
1484void display_opts6(void);
1485#  endif
1486void log_context(int family, struct dhcp_context *context);
1487void log_relay(int family, struct dhcp_relay *relay);
1488#endif
1489
1490/* outpacket.c */
1491#ifdef HAVE_DHCP6
1492void end_opt6(int container);
1493void reset_counter(void);
1494int save_counter(int newval);
1495void *expand(size_t headroom);
1496int new_opt6(int opt);
1497void *put_opt6(void *data, size_t len);
1498void put_opt6_long(unsigned int val);
1499void put_opt6_short(unsigned int val);
1500void put_opt6_char(unsigned int val);
1501void put_opt6_string(char *s);
1502#endif
1503
1504/* radv.c */
1505#ifdef HAVE_DHCP6
1506void ra_init(time_t now);
1507void icmp6_packet(time_t now);
1508time_t periodic_ra(time_t now);
1509void ra_start_unsolicited(time_t now, struct dhcp_context *context);
1510#endif
1511
1512/* slaac.c */
1513#ifdef HAVE_DHCP6
1514void slaac_add_addrs(struct dhcp_lease *lease, time_t now, int force);
1515time_t periodic_slaac(time_t now, struct dhcp_lease *leases);
1516void slaac_ping_reply(struct in6_addr *sender, unsigned char *packet, char *interface, struct dhcp_lease *leases);
1517#endif
1518
1519/* loop.c */
1520#ifdef HAVE_LOOP
1521void loop_send_probes();
1522int detect_loop(char *query, int type);
1523#endif
1524
1525/* inotify.c */
1526#ifdef HAVE_INOTIFY
1527void inotify_dnsmasq_init();
1528int inotify_check(time_t now);
1529void set_dynamic_inotify(int flag, int total_size, struct crec **rhash, int revhashsz);
1530#endif
1531
1532/* poll.c */
1533void poll_reset(void);
1534int poll_check(int fd, short event);
1535void poll_listen(int fd, short event);
1536int do_poll(int timeout);
1537
1538/* rrfilter.c */
1539size_t rrfilter(struct dns_header *header, size_t plen, int mode);
1540u16 *rrfilter_desc(int type);
1541int expand_workspace(unsigned char ***wkspc, int *szp, int new);
1542
1543/* edns0.c */
1544unsigned char *find_pseudoheader(struct dns_header *header, size_t plen,
1545                                   size_t *len, unsigned char **p, int *is_sign, int *is_last);
1546size_t add_pseudoheader(struct dns_header *header, size_t plen, unsigned char *limit,
1547                        unsigned short udp_sz, int optno, unsigned char *opt, size_t optlen, int set_do, int replace);
1548size_t add_do_bit(struct dns_header *header, size_t plen, unsigned char *limit);
1549size_t add_edns0_config(struct dns_header *header, size_t plen, unsigned char *limit,
1550                        union mysockaddr *source, time_t now, int *check_subnet);
1551int check_source(struct dns_header *header, size_t plen, unsigned char *pseudoheader, union mysockaddr *peer);
1552
1553/* arp.c */
1554int find_mac(union mysockaddr *addr, unsigned char *mac, int lazy, time_t now);
1555int do_arp_script_run(void);
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