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git.ipfire.org Git - people/ms/dnsmasq.git/blob - src/dnsmasq.h
1 /* dnsmasq is Copyright (c) 2000-2013 Simon Kelley
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.
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.
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/>.
17 #define COPYRIGHT "Copyright (c) 2000-2013 Simon Kelley"
20 /* Ensure we can use files >2GB (log files may grow this big) */
21 # define _LARGEFILE_SOURCE 1
22 # define _FILE_OFFSET_BITS 64
25 /* Get linux C library versions and define _GNU_SOURCE for kFreeBSD. */
26 #if defined(__linux__) || defined(__GLIBC__)
30 # include <features.h>
33 /* Need these defined early */
34 #if defined(__sun) || defined(__sun__)
36 # define __EXTENSIONS__
39 /* get these before config.h for IPv6 stuff... */
40 #include <sys/types.h>
41 #include <sys/socket.h>
44 /* Define before netinet/in.h to select API. OSX Lion onwards. */
45 # define __APPLE_USE_RFC_3542
47 #include <netinet/in.h>
49 /* Also needed before config.h. */
54 typedef unsigned char u8
;
55 typedef unsigned short u16
;
56 typedef unsigned int u32
;
57 typedef unsigned long long u64
;
59 #include "dns-protocol.h"
60 #include "dhcp-protocol.h"
62 #include "dhcp6-protocol.h"
63 #include "radv-protocol.h"
66 #define gettext_noop(S) (S)
72 # define _(S) gettext(S)
75 #include <arpa/inet.h>
77 #include <sys/ioctl.h>
78 #if defined(HAVE_SOLARIS_NETWORK)
79 # include <sys/sockio.h>
81 #include <sys/select.h>
87 #if defined(HAVE_SOLARIS_NETWORK) && !defined(ifr_mtu)
88 /* Some solaris net/if./h omit this. */
89 # define ifr_mtu ifr_ifru.ifru_metric
104 #if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__sun__) || defined (__sun) || defined (__ANDROID__)
105 # include <netinet/if_ether.h>
107 # include <net/ethernet.h>
109 #include <net/if_arp.h>
110 #include <netinet/in_systm.h>
111 #include <netinet/ip.h>
112 #include <netinet/ip_icmp.h>
116 #ifndef HAVE_LINUX_NETWORK
117 # include <net/if_dl.h>
120 #if defined(HAVE_LINUX_NETWORK)
121 #include <linux/capability.h>
122 /* There doesn't seem to be a universally-available
123 userpace header for these. */
124 extern int capset(cap_user_header_t header
, cap_user_data_t data
);
125 extern int capget(cap_user_header_t header
, cap_user_data_t data
);
126 #define LINUX_CAPABILITY_VERSION_1 0x19980330
127 #define LINUX_CAPABILITY_VERSION_2 0x20071026
128 #define LINUX_CAPABILITY_VERSION_3 0x20080522
130 #include <sys/prctl.h>
131 #elif defined(HAVE_SOLARIS_NETWORK)
135 /* daemon is function in the C library.... */
136 #define daemon dnsmasq_daemon
138 /* Async event queue */
140 int event
, data
, msg_sz
;
143 #define EVENT_RELOAD 1
145 #define EVENT_ALARM 3
147 #define EVENT_CHILD 5
148 #define EVENT_REOPEN 6
149 #define EVENT_EXITED 7
150 #define EVENT_KILLED 8
151 #define EVENT_EXEC_ERR 9
152 #define EVENT_PIPE_ERR 10
153 #define EVENT_USER_ERR 11
154 #define EVENT_CAP_ERR 12
155 #define EVENT_PIDFILE 13
156 #define EVENT_HUSER_ERR 14
157 #define EVENT_GROUP_ERR 15
159 #define EVENT_LOG_ERR 17
160 #define EVENT_FORK_ERR 18
161 #define EVENT_LUA_ERR 19
162 #define EVENT_TFTP_ERR 20
171 #define EC_INIT_OFFSET 10
173 /* Min buffer size: we check after adding each record, so there must be
174 memory for the largest packet, and the largest record so the
175 min for DNS is PACKETSZ+MAXDNAME+RRFIXEDSZ which is < 1000.
176 This might be increased is EDNS packet size if greater than the minimum.
178 #define DNSMASQ_PACKETSZ PACKETSZ+MAXDNAME+RRFIXEDSZ
180 /* Trust the compiler dead-code eliminator.... */
181 #define option_bool(x) (((x) < 32) ? daemon->options & (1u << (x)) : daemon->options2 & (1u << ((x) - 32)))
183 #define OPT_BOGUSPRIV 0
187 #define OPT_NO_HOSTS 4
188 #define OPT_NO_POLL 5
191 #define OPT_NO_RESOLV 8
193 #define OPT_LOCALMX 10
194 #define OPT_NO_NEG 11
195 #define OPT_NODOTS_LOCAL 12
196 #define OPT_NOWILD 13
197 #define OPT_ETHERS 14
198 #define OPT_RESOLV_DOMAIN 15
199 #define OPT_NO_FORK 16
200 #define OPT_AUTHORITATIVE 17
201 #define OPT_LOCALISE 18
203 #define OPT_DHCP_FQDN 20
204 #define OPT_NO_PING 21
205 #define OPT_LEASE_RO 22
206 #define OPT_ALL_SERVERS 23
207 #define OPT_RELOAD 24
208 #define OPT_LOCAL_REBIND 25
209 #define OPT_TFTP_SECURE 26
210 #define OPT_TFTP_NOBLOCK 27
211 #define OPT_LOG_OPTS 28
212 #define OPT_TFTP_APREF 29
213 #define OPT_NO_OVERRIDE 30
214 #define OPT_NO_REBIND 31
215 #define OPT_ADD_MAC 32
216 #define OPT_DNSSEC 33
217 #define OPT_CONSEC_ADDR 34
218 #define OPT_CONNTRACK 35
219 #define OPT_FQDN_UPDATE 36
221 #define OPT_TFTP_LC 38
222 #define OPT_CLEVERBIND 39
224 #define OPT_CLIENT_SUBNET 41
225 #define OPT_QUIET_DHCP 42
226 #define OPT_QUIET_DHCP6 43
227 #define OPT_QUIET_RA 44
230 /* extra flags for my_syslog, we use a couple of facilities since they are known
231 not to occupy the same bits as priorities, no matter how syslog.h is set up. */
232 #define MS_TFTP LOG_USER
233 #define MS_DHCP LOG_DAEMON
237 struct in_addr addr4
;
239 struct in6_addr addr6
;
246 struct bogus_addr
*next
;
249 /* dns doctor param */
251 struct in_addr in
, end
, out
, mask
;
255 struct mx_srv_record
{
257 int issrv
, srvport
, priority
, weight
;
259 struct mx_srv_record
*next
;
263 char *name
, *replace
, *regexp
, *services
, *flags
;
264 unsigned int order
, pref
;
271 unsigned short class, len
;
272 struct txt_record
*next
;
277 struct ptr_record
*next
;
281 char *alias
, *target
;
285 #define ADDRLIST_LITERAL 1
286 #define ADDRLIST_IPV6 2
289 struct all_addr addr
;
290 int flags
, prefixlen
;
291 struct addrlist
*next
;
299 struct auth_name_list
{
302 struct auth_name_list
*next
;
304 struct addrlist
*subnet
;
305 struct auth_zone
*next
;
312 struct name_list
*next
;
316 struct in6_addr addr6
;
318 struct host_record
*next
;
321 struct interface_name
{
322 char *name
; /* domain name */
323 char *intr
; /* interface name */
324 int family
; /* AF_INET, AF_INET6 or zero for both */
325 struct addrlist
*addr
;
326 struct interface_name
*next
;
331 union bigname
*next
; /* freelist */
335 struct keydata
*next
;
336 unsigned char key
[KEYBLOCK_LEN
];
340 struct crec
*next
, *prev
, *hash_next
;
341 /* union is 16 bytes when doing IPv6, 8 bytes on 32 bit machines without IPv6 */
343 struct all_addr addr
;
347 struct interface_name
*int_name
;
349 int uid
; /* -1 if union is interface-name */
352 struct keydata
*keydata
;
354 unsigned char digest
; /* DS only */
355 unsigned short flags_or_keyid
; /* flags for DNSKEY, keyid for DS */
358 time_t ttd
; /* time to die */
359 /* used as keylen if F_DS or F_DNSKEY, index to source for F_HOSTS */
361 unsigned short flags
;
363 char sname
[SMALLDNAME
];
364 union bigname
*bname
;
369 #define F_IMMORTAL (1u<<0)
370 #define F_NAMEP (1u<<1)
371 #define F_REVERSE (1u<<2)
372 #define F_FORWARD (1u<<3)
373 #define F_DHCP (1u<<4)
374 #define F_NEG (1u<<5)
375 #define F_HOSTS (1u<<6)
376 #define F_IPV4 (1u<<7)
377 #define F_IPV6 (1u<<8)
378 #define F_BIGNAME (1u<<9)
379 #define F_NXDOMAIN (1u<<10)
380 #define F_CNAME (1u<<11)
381 #define F_DNSKEY (1u<<12)
382 #define F_CONFIG (1u<<13)
383 #define F_DS (1u<<14)
384 #define F_DNSSECOK (1u<<15)
386 /* below here are only valid as args to log_query: cache
387 entries are limited to 16 bits */
388 #define F_UPSTREAM (1u<<16)
389 #define F_RRNAME (1u<<17)
390 #define F_SERVER (1u<<18)
391 #define F_QUERY (1u<<19)
392 #define F_NOERR (1u<<20)
393 #define F_AUTH (1u<<21)
396 #define F_TYPE (F_IPV4 | F_IPV6 | F_DNSKEY | F_DS) /* Only one may be set */
400 /* struct sockaddr is not large enough to hold any address,
401 and specifically not big enough to hold an IPv6 address.
402 Blech. Roll our own. */
405 struct sockaddr_in in
;
406 #if defined(HAVE_IPV6)
407 struct sockaddr_in6 in6
;
411 /* bits in flag param to IPv6 callbacks from iface_enumerate() */
412 #define IFACE_TENTATIVE 1
413 #define IFACE_DEPRECATED 2
414 #define IFACE_PERMANENT 4
417 #define SERV_FROM_RESOLV 1 /* 1 for servers from resolv, 0 for command line. */
418 #define SERV_NO_ADDR 2 /* no server, this domain is local only */
419 #define SERV_LITERAL_ADDRESS 4 /* addr is the answer, not the server */
420 #define SERV_HAS_DOMAIN 8 /* server for one domain only */
421 #define SERV_HAS_SOURCE 16 /* source address defined */
422 #define SERV_FOR_NODOTS 32 /* server for names with no domain part only */
423 #define SERV_WARNED_RECURSIVE 64 /* avoid warning spam */
424 #define SERV_FROM_DBUS 128 /* 1 if source is DBus */
425 #define SERV_MARK 256 /* for mark-and-delete */
426 #define SERV_TYPE (SERV_HAS_DOMAIN | SERV_FOR_NODOTS)
427 #define SERV_COUNTED 512 /* workspace for log code */
428 #define SERV_USE_RESOLV 1024 /* forward this domain in the normal way */
429 #define SERV_NO_REBIND 2048 /* inhibit dns-rebind protection */
433 union mysockaddr source_addr
;
434 char interface
[IF_NAMESIZE
+1];
435 struct serverfd
*next
;
440 unsigned short refcount
, family
;
444 union mysockaddr addr
, source_addr
;
445 char interface
[IF_NAMESIZE
+1];
446 struct serverfd
*sfd
;
447 char *domain
; /* set if this server only handles a domain. */
449 unsigned int queries
, failed_queries
;
460 union mysockaddr addr
;
461 struct in_addr netmask
; /* only valid for IPv4 */
462 int tftp_ok
, dhcp_ok
, mtu
, done
, warned
, dad
, dns_auth
, index
, multicast_done
, found
;
468 int fd
, tcpfd
, tftpfd
, family
;
469 struct irec
*iface
; /* only sometimes valid for non-wildcard */
470 struct listener
*next
;
473 /* interface and address parms from command line. */
476 union mysockaddr addr
;
481 /* resolv-file parms from command-line */
483 struct resolvc
*next
;
484 int is_default
, logged
;
489 /* adn-hosts parms from command-line (also dhcp-hostsfile and dhcp-optsfile */
491 #define AH_INACTIVE 2
493 struct hostsfile
*next
;
496 int index
; /* matches to cache entries for logging */
499 #define FREC_NOREBIND 1
500 #define FREC_CHECKING_DISABLED 2
501 #define FREC_HAS_SUBNET 4
504 union mysockaddr source
;
505 struct all_addr dest
;
506 struct server
*sentto
; /* NULL means free */
512 unsigned short orig_id
, new_id
;
513 int fd
, forwardall
, flags
;
519 /* flags in top of length field for DHCP-option tables */
520 #define OT_ADDR_LIST 0x8000
521 #define OT_RFC1035_NAME 0x4000
522 #define OT_INTERNAL 0x2000
523 #define OT_NAME 0x1000
524 #define OT_CSTRING 0x0800
525 #define OT_DEC 0x0400
526 #define OT_TIME 0x0200
528 /* actions in the daemon->helper RPC */
530 #define ACTION_OLD_HOSTNAME 2
533 #define ACTION_TFTP 5
535 #define LEASE_NEW 1 /* newly created */
536 #define LEASE_CHANGED 2 /* modified */
537 #define LEASE_AUX_CHANGED 4 /* CLID or expiry changed */
538 #define LEASE_AUTH_NAME 8 /* hostname came from config, not from client */
539 #define LEASE_USED 16 /* used this DHCPv6 transaction */
540 #define LEASE_NA 32 /* IPv6 no-temporary lease */
541 #define LEASE_TA 64 /* IPv6 temporary lease */
542 #define LEASE_HAVE_HWADDR 128 /* Have set hwaddress */
545 int clid_len
; /* length of client identifier */
546 unsigned char *clid
; /* clientid */
547 char *hostname
, *fqdn
; /* name from client-hostname option or config */
548 char *old_hostname
; /* hostname before it moved to another lease */
550 time_t expires
; /* lease expiry */
551 #ifdef HAVE_BROKEN_RTC
554 int hwaddr_len
, hwaddr_type
;
555 unsigned char hwaddr
[DHCP_CHADDR_MAX
];
556 struct in_addr addr
, override
, giaddr
;
557 unsigned char *extradata
;
558 unsigned int extradata_len
, extradata_size
;
561 struct in6_addr addr6
;
563 struct slaac_address
{
564 struct in6_addr addr
, local
;
566 int backoff
; /* zero -> confirmed */
567 struct slaac_address
*next
;
569 int vendorclass_count
;
571 struct dhcp_lease
*next
;
576 struct dhcp_netid
*next
;
579 struct dhcp_netid_list
{
580 struct dhcp_netid
*list
;
581 struct dhcp_netid_list
*next
;
585 struct dhcp_netid_list
*set
;
586 struct dhcp_netid
*tag
;
590 struct hwaddr_config
{
591 int hwaddr_len
, hwaddr_type
;
592 unsigned char hwaddr
[DHCP_CHADDR_MAX
];
593 unsigned int wildcard_mask
;
594 struct hwaddr_config
*next
;
599 int clid_len
; /* length of client identifier */
600 unsigned char *clid
; /* clientid */
601 char *hostname
, *domain
;
602 struct dhcp_netid_list
*netid
;
604 struct in6_addr addr6
;
608 unsigned int lease_time
;
609 struct hwaddr_config
*hwaddr
;
610 struct dhcp_config
*next
;
613 #define have_config(config, mask) ((config) && ((config)->flags & (mask)))
615 #define CONFIG_DISABLE 1
616 #define CONFIG_CLID 2
617 #define CONFIG_TIME 8
618 #define CONFIG_NAME 16
619 #define CONFIG_ADDR 32
620 #define CONFIG_NOCLID 128
621 #define CONFIG_FROM_ETHERS 256 /* entry created by /etc/ethers */
622 #define CONFIG_ADDR_HOSTS 512 /* address added by from /etc/hosts */
623 #define CONFIG_DECLINED 1024 /* address declined by client */
624 #define CONFIG_BANK 2048 /* from dhcp hosts file */
625 #define CONFIG_ADDR6 4096
626 #define CONFIG_WILDCARD 8192
632 unsigned int wildcard_mask
;
633 unsigned char *vendor_class
;
636 struct dhcp_netid
*netid
;
637 struct dhcp_opt
*next
;
641 #define DHOPT_STRING 2
642 #define DHOPT_ENCAPSULATE 4
643 #define DHOPT_ENCAP_MATCH 8
644 #define DHOPT_FORCE 16
645 #define DHOPT_BANK 32
646 #define DHOPT_ENCAP_DONE 64
647 #define DHOPT_MATCH 128
648 #define DHOPT_VENDOR 256
649 #define DHOPT_HEX 512
650 #define DHOPT_VENDOR_MATCH 1024
651 #define DHOPT_RFC3925 2048
652 #define DHOPT_TAGOK 4096
653 #define DHOPT_ADDR6 8192
656 char *file
, *sname
, *tftp_sname
;
657 struct in_addr next_server
;
658 struct dhcp_netid
*netid
;
659 struct dhcp_boot
*next
;
663 unsigned short CSA
, type
;
664 char *menu
, *basename
, *sname
;
665 struct in_addr server
;
666 struct dhcp_netid
*netid
;
667 struct pxe_service
*next
;
670 #define MATCH_VENDOR 1
672 #define MATCH_CIRCUIT 3
673 #define MATCH_REMOTE 4
674 #define MATCH_SUBSCRIBER 5
676 /* vendorclass, userclass, remote-id or cicuit-id */
679 unsigned int enterprise
;
681 struct dhcp_netid netid
;
682 struct dhcp_vendor
*next
;
687 int hwaddr_len
, hwaddr_type
;
688 unsigned char hwaddr
[DHCP_CHADDR_MAX
];
689 struct dhcp_netid netid
;
690 struct dhcp_mac
*next
;
694 char iface
[IF_NAMESIZE
];
695 struct dhcp_bridge
*alias
, *next
;
699 char *domain
, *prefix
;
700 struct in_addr start
, end
;
702 struct in6_addr start6
, end6
;
705 struct cond_domain
*next
;
708 #ifdef OPTION6_PREFIX_CLASS
709 struct prefix_class
{
711 struct dhcp_netid tag
;
712 struct prefix_class
*next
;
716 struct ra_interface
{
718 int interval
, lifetime
, prio
;
719 struct ra_interface
*next
;
722 struct dhcp_context
{
723 unsigned int lease_time
, addr_epoch
;
724 struct in_addr netmask
, broadcast
;
725 struct in_addr local
, router
;
726 struct in_addr start
, end
; /* range of available addresses */
728 struct in6_addr start6
, end6
; /* range of available addresses */
729 struct in6_addr local6
;
730 int prefix
, if_index
;
731 unsigned int valid
, preferred
, saved_valid
;
732 time_t ra_time
, ra_short_period_start
, address_lost_time
;
733 char *template_interface
;
736 struct dhcp_netid netid
, *filter
;
737 struct dhcp_context
*next
, *current
;
740 #define CONTEXT_STATIC (1u<<0)
741 #define CONTEXT_NETMASK (1u<<1)
742 #define CONTEXT_BRDCAST (1u<<2)
743 #define CONTEXT_PROXY (1u<<3)
744 #define CONTEXT_RA_ONLY (1u<<4)
745 #define CONTEXT_RA_DONE (1u<<5)
746 #define CONTEXT_RA_NAME (1u<<6)
747 #define CONTEXT_RA_STATELESS (1u<<7)
748 #define CONTEXT_DHCP (1u<<8)
749 #define CONTEXT_DEPRECATE (1u<<9)
750 #define CONTEXT_TEMPLATE (1u<<10) /* create contexts using addresses */
751 #define CONTEXT_CONSTRUCTED (1u<<11)
752 #define CONTEXT_GC (1u<<12)
753 #define CONTEXT_RA (1u<<13)
754 #define CONTEXT_CONF_USED (1u<<14)
755 #define CONTEXT_USED (1u<<15)
756 #define CONTEXT_OLD (1u<<16)
757 #define CONTEXT_V6 (1u<<17)
764 struct ping_result
*next
;
775 struct tftp_transfer
{
779 unsigned int block
, blocksize
, expansion
;
781 union mysockaddr peer
;
782 char opt_blocksize
, opt_transize
, netascii
, carrylf
;
783 struct tftp_file
*file
;
784 struct tftp_transfer
*next
;
789 struct addr_list
*next
;
795 struct tftp_prefix
*next
;
799 struct all_addr local
, server
;
800 char *interface
; /* Allowable interface for replies from server, and dest for IPv6 multicast */
801 int iface_index
; /* working - interface in which requests arrived, for return */
802 struct dhcp_relay
*current
, *next
;
805 extern struct daemon
{
806 /* datastuctures representing the command-line and
807 config file arguments. All set (including defaults)
810 unsigned int options
, options2
;
811 struct resolvc default_resolv
, *resolv_files
;
813 struct mx_srv_record
*mxnames
;
815 struct txt_record
*txt
, *rr
;
816 struct ptr_record
*ptr
;
817 struct host_record
*host_records
, *host_records_tail
;
818 struct cname
*cnames
;
819 struct auth_zone
*auth_zones
;
820 struct interface_name
*int_names
;
825 char *username
, *groupname
, *scriptuser
;
827 char *authserver
, *hostmaster
;
828 struct iname
*authinterface
;
829 struct name_list
*secondary_forward_server
;
830 int group_set
, osport
;
832 struct cond_domain
*cond_domain
, *synth_domains
;
834 char *lease_change_command
;
835 struct iname
*if_names
, *if_addrs
, *if_except
, *dhcp_except
, *auth_peers
, *tftp_interfaces
;
836 struct bogus_addr
*bogus_addr
;
837 struct server
*servers
;
838 struct ipsets
*ipsets
;
839 int log_fac
; /* log facility */
840 char *log_file
; /* optional log file */
841 int max_logs
; /* queue limit */
842 int cachesize
, ftabsize
;
843 int port
, query_port
, min_port
;
844 unsigned long local_ttl
, neg_ttl
, max_ttl
, max_cache_ttl
, auth_ttl
;
845 struct hostsfile
*addn_hosts
;
846 struct dhcp_context
*dhcp
, *dhcp6
;
847 struct ra_interface
*ra_interfaces
;
848 struct dhcp_config
*dhcp_conf
;
849 struct dhcp_opt
*dhcp_opts
, *dhcp_match
, *dhcp_opts6
, *dhcp_match6
;
850 struct dhcp_vendor
*dhcp_vendors
;
851 struct dhcp_mac
*dhcp_macs
;
852 struct dhcp_boot
*boot_config
;
853 struct pxe_service
*pxe_services
;
854 struct tag_if
*tag_if
;
855 struct addr_list
*override_relays
;
856 struct dhcp_relay
*relay4
, *relay6
;
859 int doing_ra
, doing_dhcp6
;
860 struct dhcp_netid_list
*dhcp_ignore
, *dhcp_ignore_names
, *dhcp_gen_names
;
861 struct dhcp_netid_list
*force_broadcast
, *bootp_dynamic
;
862 struct hostsfile
*dhcp_hosts_file
, *dhcp_opts_file
;
863 int dhcp_max
, tftp_max
;
864 int dhcp_server_port
, dhcp_client_port
;
865 int start_tftp_port
, end_tftp_port
;
866 unsigned int min_leasetime
;
867 struct doctor
*doctors
;
868 unsigned short edns_pktsz
;
870 struct tftp_prefix
*if_prefix
; /* per-interface TFTP prefixes */
871 unsigned int duid_enterprise
, duid_config_len
;
872 unsigned char *duid_config
;
874 unsigned long soa_sn
, soa_refresh
, soa_retry
, soa_expiry
;
875 #ifdef OPTION6_PREFIX_CLASS
876 struct prefix_class
*prefix_classes
;
879 /* globally used stuff for DNS */
880 char *packet
; /* packet buffer */
881 int packet_buff_sz
; /* size of above */
882 char *namebuff
; /* MAXDNAME size buffer */
883 unsigned int local_answer
, queries_forwarded
, auth_answer
;
884 struct frec
*frec_list
;
885 struct serverfd
*sfds
;
886 struct irec
*interfaces
;
887 struct listener
*listeners
;
888 struct server
*last_server
;
891 struct server
*srv_save
; /* Used for resend on DoD */
892 size_t packet_len
; /* " " */
893 struct randfd
*rfd_save
; /* " " */
894 pid_t tcp_pids
[MAX_PROCS
];
895 struct randfd randomsocks
[RANDOM_SOCKS
];
899 int dhcpfd
, helperfd
, pxefd
;
900 #if defined(HAVE_LINUX_NETWORK)
902 #elif defined(HAVE_BSD_NETWORK)
903 int dhcp_raw_fd
, dhcp_icmp_fd
, routefd
;
905 struct iovec dhcp_packet
;
906 char *dhcp_buff
, *dhcp_buff2
, *dhcp_buff3
;
907 struct ping_result
*ping_results
;
909 struct dhcp_bridge
*bridges
;
913 struct iovec outpacket
;
914 int dhcp6fd
, icmp6fd
;
917 /* void * here to avoid depending on dbus headers outside dbus.c */
920 struct watch
*watches
;
924 struct tftp_transfer
*tftp_trans
, *tftp_done_trans
;
926 /* utility string buffer, hold max sized IP address as string */
932 void cache_init(void);
933 void log_query(unsigned int flags
, char *name
, struct all_addr
*addr
, char *arg
);
934 char *record_source(int index
);
935 void querystr(char *desc
, char *str
, unsigned short type
);
936 struct crec
*cache_find_by_addr(struct crec
*crecp
,
937 struct all_addr
*addr
, time_t now
,
938 unsigned short prot
);
939 struct crec
*cache_find_by_name(struct crec
*crecp
,
940 char *name
, time_t now
, unsigned short prot
);
941 void cache_end_insert(void);
942 void cache_start_insert(void);
943 struct crec
*cache_insert(char *name
, struct all_addr
*addr
,
944 time_t now
, unsigned long ttl
, unsigned short flags
);
945 void cache_reload(void);
946 void cache_add_dhcp_entry(char *host_name
, int prot
, struct all_addr
*host_address
, time_t ttd
);
947 struct in_addr
a_record_from_hosts(char *name
, time_t now
);
948 void cache_unhash_dhcp(void);
949 void dump_cache(time_t now
);
950 char *cache_get_name(struct crec
*crecp
);
951 char *cache_get_cname_target(struct crec
*crecp
);
952 struct crec
*cache_enumerate(int init
);
954 struct keydata
*keydata_alloc(char *data
, size_t len
);
955 void keydata_free(struct keydata
*blocks
);
959 char *get_domain(struct in_addr addr
);
961 char *get_domain6(struct in6_addr
*addr
);
963 int is_name_synthetic(int flags
, char *name
, struct all_addr
*addr
);
964 int is_rev_synth(int flag
, struct all_addr
*addr
, char *name
);
967 unsigned int extract_request(struct dns_header
*header
, size_t qlen
,
968 char *name
, unsigned short *typep
);
969 size_t setup_reply(struct dns_header
*header
, size_t qlen
,
970 struct all_addr
*addrp
, unsigned int flags
,
971 unsigned long local_ttl
);
972 int extract_addresses(struct dns_header
*header
, size_t qlen
, char *namebuff
,
973 time_t now
, char **ipsets
, int is_sign
, int checkrebind
,
974 int checking_disabled
);
975 size_t answer_request(struct dns_header
*header
, char *limit
, size_t qlen
,
976 struct in_addr local_addr
, struct in_addr local_netmask
, time_t now
);
977 int check_for_bogus_wildcard(struct dns_header
*header
, size_t qlen
, char *name
,
978 struct bogus_addr
*addr
, time_t now
);
979 unsigned char *find_pseudoheader(struct dns_header
*header
, size_t plen
,
980 size_t *len
, unsigned char **p
, int *is_sign
);
981 int check_for_local_domain(char *name
, time_t now
);
982 unsigned int questions_crc(struct dns_header
*header
, size_t plen
, char *buff
);
983 size_t resize_packet(struct dns_header
*header
, size_t plen
,
984 unsigned char *pheader
, size_t hlen
);
985 size_t add_mac(struct dns_header
*header
, size_t plen
, char *limit
, union mysockaddr
*l3
);
986 size_t add_source_addr(struct dns_header
*header
, size_t plen
, char *limit
, union mysockaddr
*source
);
987 int check_source(struct dns_header
*header
, size_t plen
, unsigned char *pseudoheader
, union mysockaddr
*peer
);
988 int add_resource_record(struct dns_header
*header
, char *limit
, int *truncp
,
989 int nameoffset
, unsigned char **pp
, unsigned long ttl
,
990 int *offset
, unsigned short type
, unsigned short class, char *format
, ...);
991 unsigned char *skip_questions(struct dns_header
*header
, size_t plen
);
992 int extract_name(struct dns_header
*header
, size_t plen
, unsigned char **pp
,
993 char *name
, int isExtract
, int extrabytes
);
994 int in_arpa_name_2_addr(char *namein
, struct all_addr
*addrp
);
995 int private_net(struct in_addr addr
, int ban_localhost
);
999 size_t answer_auth(struct dns_header
*header
, char *limit
, size_t qlen
,
1000 time_t now
, union mysockaddr
*peer_addr
, int local_query
);
1001 int in_zone(struct auth_zone
*zone
, char *name
, char **cut
);
1005 void rand_init(void);
1006 unsigned short rand16(void);
1008 int legal_hostname(char *c
);
1009 char *canonicalise(char *s
, int *nomem
);
1010 unsigned char *do_rfc1035_name(unsigned char *p
, char *sval
);
1011 void *safe_malloc(size_t size
);
1012 void safe_pipe(int *fd
, int read_noblock
);
1013 void *whine_malloc(size_t size
);
1014 int sa_len(union mysockaddr
*addr
);
1015 int sockaddr_isequal(union mysockaddr
*s1
, union mysockaddr
*s2
);
1016 int hostname_isequal(const char *a
, const char *b
);
1017 time_t dnsmasq_time(void);
1018 int is_same_net(struct in_addr a
, struct in_addr b
, struct in_addr mask
);
1020 int is_same_net6(struct in6_addr
*a
, struct in6_addr
*b
, int prefixlen
);
1021 u64
addr6part(struct in6_addr
*addr
);
1022 void setaddr6part(struct in6_addr
*addr
, u64 host
);
1024 int retry_send(void);
1025 void prettyprint_time(char *buf
, unsigned int t
);
1026 int prettyprint_addr(union mysockaddr
*addr
, char *buf
);
1027 int parse_hex(char *in
, unsigned char *out
, int maxlen
,
1028 unsigned int *wildcard_mask
, int *mac_type
);
1029 int memcmp_masked(unsigned char *a
, unsigned char *b
, int len
,
1031 int expand_buf(struct iovec
*iov
, size_t size
);
1032 char *print_mac(char *buff
, unsigned char *mac
, int len
);
1033 void bump_maxfd(int fd
, int *max
);
1034 int read_write(int fd
, unsigned char *packet
, int size
, int rw
);
1036 int wildcard_match(const char* wildcard
, const char* match
);
1039 void die(char *message
, char *arg1
, int exit_code
);
1040 int log_start(struct passwd
*ent_pw
, int errfd
);
1041 int log_reopen(char *log_file
);
1042 void my_syslog(int priority
, const char *format
, ...);
1043 void set_log_writer(fd_set
*set
, int *maxfdp
);
1044 void check_log_writer(fd_set
*set
);
1045 void flush_log(void);
1048 void read_opts (int argc
, char **argv
, char *compile_opts
);
1049 char *option_string(int prot
, unsigned int opt
, unsigned char *val
,
1050 int opt_len
, char *buf
, int buf_len
);
1051 void reread_dhcp(void);
1052 void set_option_bool(unsigned int opt
);
1053 void reset_option_bool(unsigned int opt
);
1054 struct hostsfile
*expand_filelist(struct hostsfile
*list
);
1055 char *parse_server(char *arg
, union mysockaddr
*addr
,
1056 union mysockaddr
*source_addr
, char *interface
, int *flags
);
1059 void reply_query(int fd
, int family
, time_t now
);
1060 void receive_query(struct listener
*listen
, time_t now
);
1061 unsigned char *tcp_request(int confd
, time_t now
,
1062 union mysockaddr
*local_addr
, struct in_addr netmask
, int auth_dns
);
1063 void server_gone(struct server
*server
);
1064 struct frec
*get_new_frec(time_t now
, int *wait
);
1065 int send_from(int fd
, int nowild
, char *packet
, size_t len
,
1066 union mysockaddr
*to
, struct all_addr
*source
,
1067 unsigned int iface
);
1070 int indextoname(int fd
, int index
, char *name
);
1071 int local_bind(int fd
, union mysockaddr
*addr
, char *intname
, int is_tcp
);
1072 int random_sock(int family
);
1073 void pre_allocate_sfds(void);
1074 int reload_servers(char *fname
);
1075 void check_servers(void);
1076 int enumerate_interfaces(int reset
);
1077 void create_wildcard_listeners(void);
1078 void create_bound_listeners(int die
);
1079 void warn_bound_listeners(void);
1080 void warn_int_names(void);
1081 int is_dad_listeners(void);
1082 int iface_check(int family
, struct all_addr
*addr
, char *name
, int *auth_dns
);
1083 int loopback_exception(int fd
, int family
, struct all_addr
*addr
, char *name
);
1084 int label_exception(int index
, int family
, struct all_addr
*addr
);
1086 int tcp_interface(int fd
, int af
);
1088 int set_ipv6pktinfo(int fd
);
1091 void join_multicast(int dienow
);
1093 #if defined(HAVE_LINUX_NETWORK) || defined(HAVE_BSD_NETWORK)
1094 void newaddress(time_t now
);
1100 void dhcp_init(void);
1101 void dhcp_packet(time_t now
, int pxe_fd
);
1102 struct dhcp_context
*address_available(struct dhcp_context
*context
,
1103 struct in_addr addr
,
1104 struct dhcp_netid
*netids
);
1105 struct dhcp_context
*narrow_context(struct dhcp_context
*context
,
1106 struct in_addr taddr
,
1107 struct dhcp_netid
*netids
);
1108 int address_allocate(struct dhcp_context
*context
,
1109 struct in_addr
*addrp
, unsigned char *hwaddr
, int hw_len
,
1110 struct dhcp_netid
*netids
, time_t now
);
1111 void dhcp_read_ethers(void);
1112 struct dhcp_config
*config_find_by_address(struct dhcp_config
*configs
, struct in_addr addr
);
1113 char *host_from_dns(struct in_addr addr
);
1118 void lease_update_file(time_t now
);
1119 void lease_update_dns(int force
);
1120 void lease_init(time_t now
);
1121 struct dhcp_lease
*lease4_allocate(struct in_addr addr
);
1123 struct dhcp_lease
*lease6_allocate(struct in6_addr
*addrp
, int lease_type
);
1124 struct dhcp_lease
*lease6_find(unsigned char *clid
, int clid_len
,
1125 int lease_type
, int iaid
, struct in6_addr
*addr
);
1126 void lease6_reset(void);
1127 struct dhcp_lease
*lease6_find_by_client(struct dhcp_lease
*first
, int lease_type
, unsigned char *clid
, int clid_len
, int iaid
);
1128 struct dhcp_lease
*lease6_find_by_addr(struct in6_addr
*net
, int prefix
, u64 addr
);
1129 u64
lease_find_max_addr6(struct dhcp_context
*context
);
1130 void lease_ping_reply(struct in6_addr
*sender
, unsigned char *packet
, char *interface
);
1131 void lease_update_slaac(time_t now
);
1132 void lease_set_iaid(struct dhcp_lease
*lease
, int iaid
);
1133 void lease_make_duid(time_t now
);
1135 void lease_set_hwaddr(struct dhcp_lease
*lease
, unsigned char *hwaddr
,
1136 unsigned char *clid
, int hw_len
, int hw_type
, int clid_len
, time_t now
, int force
);
1137 void lease_set_hostname(struct dhcp_lease
*lease
, char *name
, int auth
, char *domain
, char *config_domain
);
1138 void lease_set_expires(struct dhcp_lease
*lease
, unsigned int len
, time_t now
);
1139 void lease_set_interface(struct dhcp_lease
*lease
, int interface
, time_t now
);
1140 struct dhcp_lease
*lease_find_by_client(unsigned char *hwaddr
, int hw_len
, int hw_type
,
1141 unsigned char *clid
, int clid_len
);
1142 struct dhcp_lease
*lease_find_by_addr(struct in_addr addr
);
1143 struct in_addr
lease_find_max_addr(struct dhcp_context
*context
);
1144 void lease_prune(struct dhcp_lease
*target
, time_t now
);
1145 void lease_update_from_configs(void);
1146 int do_script_run(time_t now
);
1147 void rerun_scripts(void);
1148 void lease_find_interfaces(time_t now
);
1150 void lease_add_extradata(struct dhcp_lease
*lease
, unsigned char *data
,
1151 unsigned int len
, int delim
);
1157 size_t dhcp_reply(struct dhcp_context
*context
, char *iface_name
, int int_index
,
1158 size_t sz
, time_t now
, int unicast_dest
, int *is_inform
, int pxe_fd
, struct in_addr fallback
);
1159 unsigned char *extended_hwaddr(int hwtype
, int hwlen
, unsigned char *hwaddr
,
1160 int clid_len
, unsigned char *clid
, int *len_out
);
1165 int make_icmp_sock(void);
1166 int icmp_ping(struct in_addr addr
);
1168 void send_alarm(time_t event
, time_t now
);
1169 void send_event(int fd
, int event
, int data
, char *msg
);
1170 void clear_cache_and_reload(time_t now
);
1171 void poll_resolv(int force
, int do_reload
, time_t now
);
1174 #ifdef HAVE_LINUX_NETWORK
1175 void netlink_init(void);
1176 void netlink_multicast(time_t now
);
1180 #ifdef HAVE_BSD_NETWORK
1181 void init_bpf(void);
1182 void send_via_bpf(struct dhcp_packet
*mess
, size_t len
,
1183 struct in_addr iface_addr
, struct ifreq
*ifr
);
1184 void route_init(void);
1185 void route_sock(time_t now
);
1188 /* bpf.c or netlink.c */
1189 int iface_enumerate(int family
, void *parm
, int (callback
)());
1193 char *dbus_init(void);
1194 void check_dbus_listeners(fd_set
*rset
, fd_set
*wset
, fd_set
*eset
);
1195 void set_dbus_listeners(int *maxfdp
, fd_set
*rset
, fd_set
*wset
, fd_set
*eset
);
1197 void emit_dbus_signal(int action
, struct dhcp_lease
*lease
, char *hostname
);
1203 void ipset_init(void);
1204 int add_to_ipset(const char *setname
, const struct all_addr
*ipaddr
, int flags
, int remove
);
1208 #if defined(HAVE_SCRIPT)
1209 int create_helper(int event_fd
, int err_fd
, uid_t uid
, gid_t gid
, long max_fd
);
1210 void helper_write(void);
1211 void queue_script(int action
, struct dhcp_lease
*lease
,
1212 char *hostname
, time_t now
);
1214 void queue_tftp(off_t file_len
, char *filename
, union mysockaddr
*peer
);
1216 int helper_buf_empty(void);
1221 void tftp_request(struct listener
*listen
, time_t now
);
1222 void check_tftp_listeners(fd_set
*rset
, time_t now
);
1223 int do_tftp_script_run(void);
1227 #ifdef HAVE_CONNTRACK
1228 int get_incoming_mark(union mysockaddr
*peer_addr
, struct all_addr
*local_addr
,
1229 int istcp
, unsigned int *markp
);
1234 void dhcp6_init(void);
1235 void dhcp6_packet(time_t now
);
1236 struct dhcp_context
*address6_allocate(struct dhcp_context
*context
, unsigned char *clid
, int clid_len
, int temp_addr
,
1237 int iaid
, int serial
, struct dhcp_netid
*netids
, int plain_range
, struct in6_addr
*ans
);
1238 int config_valid(struct dhcp_config
*config
, struct dhcp_context
*context
, struct in6_addr
*addr
);
1239 struct dhcp_context
*address6_available(struct dhcp_context
*context
,
1240 struct in6_addr
*taddr
,
1241 struct dhcp_netid
*netids
,
1243 struct dhcp_context
*address6_valid(struct dhcp_context
*context
,
1244 struct in6_addr
*taddr
,
1245 struct dhcp_netid
*netids
,
1247 struct dhcp_config
*config_find_by_address6(struct dhcp_config
*configs
, struct in6_addr
*net
,
1248 int prefix
, u64 addr
);
1249 void make_duid(time_t now
);
1250 void dhcp_construct_contexts(time_t now
);
1251 void get_client_mac(struct in6_addr
*client
, int iface
, unsigned char *mac
,
1252 unsigned int *maclenp
, unsigned int *mactypep
);
1257 unsigned short dhcp6_reply(struct dhcp_context
*context
, int interface
, char *iface_name
,
1258 struct in6_addr
*fallback
, size_t sz
, struct in6_addr
*client_addr
, time_t now
);
1259 void relay_upstream6(struct dhcp_relay
*relay
, ssize_t sz
, struct in6_addr
*peer_address
, u32 scope_id
);
1261 unsigned short relay_reply6( struct sockaddr_in6
*peer
, ssize_t sz
, char *arrival_interface
);
1266 void dhcp_common_init(void);
1267 ssize_t
recv_dhcp_packet(int fd
, struct msghdr
*msg
);
1268 struct dhcp_netid
*run_tag_if(struct dhcp_netid
*input
);
1269 struct dhcp_netid
*option_filter(struct dhcp_netid
*tags
, struct dhcp_netid
*context_tags
,
1270 struct dhcp_opt
*opts
);
1271 int match_netid(struct dhcp_netid
*check
, struct dhcp_netid
*pool
, int negonly
);
1272 char *strip_hostname(char *hostname
);
1273 void log_tags(struct dhcp_netid
*netid
, u32 xid
);
1274 int match_bytes(struct dhcp_opt
*o
, unsigned char *p
, int len
);
1275 void dhcp_update_configs(struct dhcp_config
*configs
);
1276 void display_opts(void);
1277 int lookup_dhcp_opt(int prot
, char *name
);
1278 int lookup_dhcp_len(int prot
, int val
);
1279 char *option_string(int prot
, unsigned int opt
, unsigned char *val
,
1280 int opt_len
, char *buf
, int buf_len
);
1281 struct dhcp_config
*find_config(struct dhcp_config
*configs
,
1282 struct dhcp_context
*context
,
1283 unsigned char *clid
, int clid_len
,
1284 unsigned char *hwaddr
, int hw_len
,
1285 int hw_type
, char *hostname
);
1286 int config_has_mac(struct dhcp_config
*config
, unsigned char *hwaddr
, int len
, int type
);
1287 #ifdef HAVE_LINUX_NETWORK
1288 char *whichdevice(void);
1289 void bindtodevice(char *device
, int fd
);
1292 void display_opts6(void);
1294 void log_context(int family
, struct dhcp_context
*context
);
1295 void log_relay(int family
, struct dhcp_relay
*relay
);
1300 void end_opt6(int container
);
1301 int save_counter(int newval
);
1302 void *expand(size_t headroom
);
1303 int new_opt6(int opt
);
1304 void *put_opt6(void *data
, size_t len
);
1305 void put_opt6_long(unsigned int val
);
1306 void put_opt6_short(unsigned int val
);
1307 void put_opt6_char(unsigned int val
);
1308 void put_opt6_string(char *s
);
1313 void ra_init(time_t now
);
1314 void icmp6_packet(time_t now
);
1315 time_t periodic_ra(time_t now
);
1316 void ra_start_unsolicted(time_t now
, struct dhcp_context
*context
);
1321 void slaac_add_addrs(struct dhcp_lease
*lease
, time_t now
, int force
);
1322 time_t periodic_slaac(time_t now
, struct dhcp_lease
*leases
);
1323 void slaac_ping_reply(struct in6_addr
*sender
, unsigned char *packet
, char *interface
, struct dhcp_lease
*leases
);