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git.ipfire.org Git - people/ms/dnsmasq.git/blob - src/dnsmasq.h
1 /* dnsmasq is Copyright (c) 2000-2012 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) 2000-2012 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
170 #define EC_INIT_OFFSET 10
172 /* Min buffer size: we check after adding each record, so there must be
173 memory for the largest packet, and the largest record so the
174 min for DNS is PACKETSZ+MAXDNAME+RRFIXEDSZ which is < 1000.
175 This might be increased is EDNS packet size if greater than the minimum.
177 #define DNSMASQ_PACKETSZ PACKETSZ+MAXDNAME+RRFIXEDSZ
179 /* Trust the compiler dead-code eliminator.... */
180 #define option_bool(x) (((x) < 32) ? daemon->options & (1u << (x)) : daemon->options2 & (1u << ((x) - 32)))
182 #define OPT_BOGUSPRIV 0
186 #define OPT_NO_HOSTS 4
187 #define OPT_NO_POLL 5
190 #define OPT_NO_RESOLV 8
192 #define OPT_LOCALMX 10
193 #define OPT_NO_NEG 11
194 #define OPT_NODOTS_LOCAL 12
195 #define OPT_NOWILD 13
196 #define OPT_ETHERS 14
197 #define OPT_RESOLV_DOMAIN 15
198 #define OPT_NO_FORK 16
199 #define OPT_AUTHORITATIVE 17
200 #define OPT_LOCALISE 18
202 #define OPT_DHCP_FQDN 20
203 #define OPT_NO_PING 21
204 #define OPT_LEASE_RO 22
205 #define OPT_ALL_SERVERS 23
206 #define OPT_RELOAD 24
207 #define OPT_LOCAL_REBIND 25
208 #define OPT_TFTP_SECURE 26
209 #define OPT_TFTP_NOBLOCK 27
210 #define OPT_LOG_OPTS 28
211 #define OPT_TFTP_APREF 29
212 #define OPT_NO_OVERRIDE 30
213 #define OPT_NO_REBIND 31
214 #define OPT_ADD_MAC 32
215 #define OPT_DNSSEC 33
216 #define OPT_CONSEC_ADDR 34
217 #define OPT_CONNTRACK 35
218 #define OPT_FQDN_UPDATE 36
222 /* extra flags for my_syslog, we use a couple of facilities since they are known
223 not to occupy the same bits as priorities, no matter how syslog.h is set up. */
224 #define MS_TFTP LOG_USER
225 #define MS_DHCP LOG_DAEMON
229 struct in_addr addr4
;
231 struct in6_addr addr6
;
238 struct bogus_addr
*next
;
241 /* dns doctor param */
243 struct in_addr in
, end
, out
, mask
;
247 struct mx_srv_record
{
249 int issrv
, srvport
, priority
, weight
;
251 struct mx_srv_record
*next
;
255 char *name
, *replace
, *regexp
, *services
, *flags
;
256 unsigned int order
, pref
;
263 unsigned short class, len
;
264 struct txt_record
*next
;
269 struct ptr_record
*next
;
273 char *alias
, *target
;
280 struct name_list
*next
;
284 struct in6_addr addr6
;
286 struct host_record
*next
;
289 struct interface_name
{
290 char *name
; /* domain name */
291 char *intr
; /* interface name */
292 struct interface_name
*next
;
297 union bigname
*next
; /* freelist */
301 struct crec
*next
, *prev
, *hash_next
;
302 time_t ttd
; /* time to die */
305 struct all_addr addr
;
311 unsigned short flags
;
313 char sname
[SMALLDNAME
];
314 union bigname
*bname
;
319 #define F_IMMORTAL (1u<<0)
320 #define F_NAMEP (1u<<1)
321 #define F_REVERSE (1u<<2)
322 #define F_FORWARD (1u<<3)
323 #define F_DHCP (1u<<4)
324 #define F_NEG (1u<<5)
325 #define F_HOSTS (1u<<6)
326 #define F_IPV4 (1u<<7)
327 #define F_IPV6 (1u<<8)
328 #define F_BIGNAME (1u<<9)
329 #define F_NXDOMAIN (1u<<10)
330 #define F_CNAME (1u<<11)
331 #define F_NOERR (1u<<12)
332 #define F_CONFIG (1u<<13)
333 /* below here are only valid as args to log_query: cache
334 entries are limited to 16 bits */
335 #define F_UPSTREAM (1u<<16)
336 #define F_RRNAME (1u<<17)
337 #define F_SERVER (1u<<18)
338 #define F_QUERY (1u<<19)
341 /* struct sockaddr is not large enough to hold any address,
342 and specifically not big enough to hold an IPv6 address.
343 Blech. Roll our own. */
346 struct sockaddr_in in
;
347 #if defined(HAVE_IPV6)
348 struct sockaddr_in6 in6
;
352 #define SERV_FROM_RESOLV 1 /* 1 for servers from resolv, 0 for command line. */
353 #define SERV_NO_ADDR 2 /* no server, this domain is local only */
354 #define SERV_LITERAL_ADDRESS 4 /* addr is the answer, not the server */
355 #define SERV_HAS_DOMAIN 8 /* server for one domain only */
356 #define SERV_HAS_SOURCE 16 /* source address defined */
357 #define SERV_FOR_NODOTS 32 /* server for names with no domain part only */
358 #define SERV_WARNED_RECURSIVE 64 /* avoid warning spam */
359 #define SERV_FROM_DBUS 128 /* 1 if source is DBus */
360 #define SERV_MARK 256 /* for mark-and-delete */
361 #define SERV_TYPE (SERV_HAS_DOMAIN | SERV_FOR_NODOTS)
362 #define SERV_COUNTED 512 /* workspace for log code */
363 #define SERV_USE_RESOLV 1024 /* forward this domain in the normal way */
364 #define SERV_NO_REBIND 2048 /* inhibit dns-rebind protection */
368 union mysockaddr source_addr
;
369 char interface
[IF_NAMESIZE
+1];
370 struct serverfd
*next
;
375 unsigned short refcount
, family
;
379 union mysockaddr addr
, source_addr
;
380 char interface
[IF_NAMESIZE
+1];
381 struct serverfd
*sfd
;
382 char *domain
; /* set if this server only handles a domain. */
384 unsigned int queries
, failed_queries
;
389 union mysockaddr addr
;
390 struct in_addr netmask
; /* only valid for IPv4 */
391 int tftp_ok
, dhcp_ok
, mtu
, done
, dad
;
397 int fd
, tcpfd
, tftpfd
, family
;
398 struct irec
*iface
; /* only sometimes valid for non-wildcard */
399 struct listener
*next
;
402 /* interface and address parms from command line. */
405 union mysockaddr addr
;
410 /* resolv-file parms from command-line */
412 struct resolvc
*next
;
413 int is_default
, logged
;
418 /* adn-hosts parms from command-line (also dhcp-hostsfile and dhcp-optsfile */
420 #define AH_INACTIVE 2
422 struct hostsfile
*next
;
425 int index
; /* matches to cache entries for logging */
428 #define FREC_NOREBIND 1
429 #define FREC_CHECKING_DISABLED 2
432 union mysockaddr source
;
433 struct all_addr dest
;
434 struct server
*sentto
; /* NULL means free */
440 unsigned short orig_id
, new_id
;
441 int fd
, forwardall
, flags
;
447 /* flags in top of length field for DHCP-option tables */
448 #define OT_ADDR_LIST 0x8000
449 #define OT_RFC1035_NAME 0x4000
450 #define OT_INTERNAL 0x2000
451 #define OT_NAME 0x1000
452 #define OT_CSTRING 0x0800
453 #define OT_DEC 0x0400
456 /* actions in the daemon->helper RPC */
458 #define ACTION_OLD_HOSTNAME 2
461 #define ACTION_TFTP 5
463 #define LEASE_NEW 1 /* newly created */
464 #define LEASE_CHANGED 2 /* modified */
465 #define LEASE_AUX_CHANGED 4 /* CLID or expiry changed */
466 #define LEASE_AUTH_NAME 8 /* hostname came from config, not from client */
467 #define LEASE_USED 16 /* used this DHCPv6 transaction */
468 #define LEASE_NA 32 /* IPv6 no-temporary lease */
469 #define LEASE_TA 64 /* IPv6 temporary lease */
470 #define LEASE_HAVE_HWADDR 128 /* Have set hwaddress */
473 int clid_len
; /* length of client identifier */
474 unsigned char *clid
; /* clientid */
475 char *hostname
, *fqdn
; /* name from client-hostname option or config */
476 char *old_hostname
; /* hostname before it moved to another lease */
478 time_t expires
; /* lease expiry */
479 #ifdef HAVE_BROKEN_RTC
482 int hwaddr_len
, hwaddr_type
; /* hw_type used for iaid in v6 */
483 unsigned char hwaddr
[DHCP_CHADDR_MAX
]; /* also IPv6 address */
484 struct in_addr addr
, override
, giaddr
;
485 unsigned char *extradata
;
486 unsigned int extradata_len
, extradata_size
;
489 struct slaac_address
{
490 struct in6_addr addr
, local
;
492 int backoff
; /* zero -> confirmed */
493 struct slaac_address
*next
;
496 struct dhcp_lease
*next
;
501 struct dhcp_netid
*next
;
504 struct dhcp_netid_list
{
505 struct dhcp_netid
*list
;
506 struct dhcp_netid_list
*next
;
510 struct dhcp_netid_list
*set
;
511 struct dhcp_netid
*tag
;
515 struct hwaddr_config
{
516 int hwaddr_len
, hwaddr_type
;
517 unsigned char hwaddr
[DHCP_CHADDR_MAX
];
518 unsigned int wildcard_mask
;
519 struct hwaddr_config
*next
;
524 int clid_len
; /* length of client identifier */
525 unsigned char *clid
; /* clientid */
526 char *hostname
, *domain
;
527 struct dhcp_netid_list
*netid
;
529 struct in6_addr addr6
;
533 unsigned int lease_time
;
534 struct hwaddr_config
*hwaddr
;
535 struct dhcp_config
*next
;
538 #define have_config(config, mask) ((config) && ((config)->flags & (mask)))
540 #define CONFIG_DISABLE 1
541 #define CONFIG_CLID 2
542 #define CONFIG_TIME 8
543 #define CONFIG_NAME 16
544 #define CONFIG_ADDR 32
545 #define CONFIG_NOCLID 128
546 #define CONFIG_FROM_ETHERS 256 /* entry created by /etc/ethers */
547 #define CONFIG_ADDR_HOSTS 512 /* address added by from /etc/hosts */
548 #define CONFIG_DECLINED 1024 /* address declined by client */
549 #define CONFIG_BANK 2048 /* from dhcp hosts file */
550 #define CONFIG_ADDR6 4096
556 unsigned int wildcard_mask
;
557 unsigned char *vendor_class
;
560 struct dhcp_netid
*netid
;
561 struct dhcp_opt
*next
;
565 #define DHOPT_STRING 2
566 #define DHOPT_ENCAPSULATE 4
567 #define DHOPT_ENCAP_MATCH 8
568 #define DHOPT_FORCE 16
569 #define DHOPT_BANK 32
570 #define DHOPT_ENCAP_DONE 64
571 #define DHOPT_MATCH 128
572 #define DHOPT_VENDOR 256
573 #define DHOPT_HEX 512
574 #define DHOPT_VENDOR_MATCH 1024
575 #define DHOPT_RFC3925 2048
576 #define DHOPT_TAGOK 4096
577 #define DHOPT_ADDR6 8192
580 char *file
, *sname
, *tftp_sname
;
581 struct in_addr next_server
;
582 struct dhcp_netid
*netid
;
583 struct dhcp_boot
*next
;
587 unsigned short CSA
, type
;
588 char *menu
, *basename
, *sname
;
589 struct in_addr server
;
590 struct dhcp_netid
*netid
;
591 struct pxe_service
*next
;
594 #define MATCH_VENDOR 1
596 #define MATCH_CIRCUIT 3
597 #define MATCH_REMOTE 4
598 #define MATCH_SUBSCRIBER 5
600 /* vendorclass, userclass, remote-id or cicuit-id */
603 unsigned int enterprise
;
605 struct dhcp_netid netid
;
606 struct dhcp_vendor
*next
;
611 int hwaddr_len
, hwaddr_type
;
612 unsigned char hwaddr
[DHCP_CHADDR_MAX
];
613 struct dhcp_netid netid
;
614 struct dhcp_mac
*next
;
618 char iface
[IF_NAMESIZE
];
619 struct dhcp_bridge
*alias
, *next
;
624 struct in_addr start
, end
;
626 struct in6_addr start6
, end6
;
629 struct cond_domain
*next
;
632 struct dhcp_context
{
633 unsigned int lease_time
, addr_epoch
;
634 struct in_addr netmask
, broadcast
;
635 struct in_addr local
, router
;
636 struct in_addr start
, end
; /* range of available addresses */
638 struct in6_addr start6
, end6
; /* range of available addresses */
639 struct in6_addr local6
;
640 int prefix
, if_index
;
645 struct dhcp_netid netid
, *filter
;
646 struct dhcp_context
*next
, *current
;
649 #define CONTEXT_STATIC 1
650 #define CONTEXT_NETMASK 2
651 #define CONTEXT_BRDCAST 4
652 #define CONTEXT_PROXY 8
653 #define CONTEXT_RA_ONLY 16
654 #define CONTEXT_RA_DONE 32
655 #define CONTEXT_RA_NAME 64
656 #define CONTEXT_RA_STATELESS 128
657 #define CONTEXT_DHCP 256
658 #define CONTEXT_DEPRECATE 512
664 struct ping_result
*next
;
675 struct tftp_transfer
{
679 unsigned int block
, blocksize
, expansion
;
681 union mysockaddr peer
;
682 char opt_blocksize
, opt_transize
, netascii
, carrylf
;
683 struct tftp_file
*file
;
684 struct tftp_transfer
*next
;
689 struct addr_list
*next
;
692 struct interface_list
{
694 struct interface_list
*next
;
700 struct tftp_prefix
*next
;
704 extern struct daemon
{
705 /* datastuctures representing the command-line and
706 config file arguments. All set (including defaults)
709 unsigned int options
, options2
;
710 struct resolvc default_resolv
, *resolv_files
;
712 struct mx_srv_record
*mxnames
;
714 struct txt_record
*txt
;
715 struct ptr_record
*ptr
;
716 struct host_record
*host_records
, *host_records_tail
;
717 struct cname
*cnames
;
718 struct interface_name
*int_names
;
721 char *username
, *groupname
, *scriptuser
;
723 int group_set
, osport
;
725 struct cond_domain
*cond_domain
;
727 char *lease_change_command
;
728 struct iname
*if_names
, *if_addrs
, *if_except
, *dhcp_except
;
729 struct bogus_addr
*bogus_addr
;
730 struct server
*servers
;
731 int log_fac
; /* log facility */
732 char *log_file
; /* optional log file */
733 int max_logs
; /* queue limit */
734 int cachesize
, ftabsize
;
735 int port
, query_port
, min_port
;
736 unsigned long local_ttl
, neg_ttl
, max_ttl
;
737 struct hostsfile
*addn_hosts
;
738 struct dhcp_context
*dhcp
, *dhcp6
, *ra_contexts
;
739 struct dhcp_config
*dhcp_conf
;
740 struct dhcp_opt
*dhcp_opts
, *dhcp_match
, *dhcp_opts6
, *dhcp_match6
;
741 struct dhcp_vendor
*dhcp_vendors
;
742 struct dhcp_mac
*dhcp_macs
;
743 struct dhcp_boot
*boot_config
;
744 struct pxe_service
*pxe_services
;
745 struct tag_if
*tag_if
;
746 struct addr_list
*override_relays
;
749 struct dhcp_netid_list
*dhcp_ignore
, *dhcp_ignore_names
, *dhcp_gen_names
;
750 struct dhcp_netid_list
*force_broadcast
, *bootp_dynamic
;
751 struct hostsfile
*dhcp_hosts_file
, *dhcp_opts_file
;
752 int dhcp_max
, tftp_max
;
753 int dhcp_server_port
, dhcp_client_port
;
754 int start_tftp_port
, end_tftp_port
;
755 unsigned int min_leasetime
;
756 struct doctor
*doctors
;
757 unsigned short edns_pktsz
;
759 struct tftp_prefix
*if_prefix
; /* per-interface TFTP prefixes */
760 struct interface_list
*tftp_interfaces
; /* interfaces for limited TFTP service */
762 unsigned int duid_enterprise
, duid_config_len
;
763 unsigned char *duid_config
;
765 /* globally used stuff for DNS */
766 char *packet
; /* packet buffer */
767 int packet_buff_sz
; /* size of above */
768 char *namebuff
; /* MAXDNAME size buffer */
769 unsigned int local_answer
, queries_forwarded
;
770 struct frec
*frec_list
;
771 struct serverfd
*sfds
;
772 struct irec
*interfaces
;
773 struct listener
*listeners
;
774 struct server
*last_server
;
777 struct server
*srv_save
; /* Used for resend on DoD */
778 size_t packet_len
; /* " " */
779 struct randfd
*rfd_save
; /* " " */
780 pid_t tcp_pids
[MAX_PROCS
];
781 struct randfd randomsocks
[RANDOM_SOCKS
];
785 int dhcpfd
, helperfd
, pxefd
;
786 #if defined(HAVE_LINUX_NETWORK)
788 #elif defined(HAVE_BSD_NETWORK)
789 int dhcp_raw_fd
, dhcp_icmp_fd
;
791 struct iovec dhcp_packet
;
792 char *dhcp_buff
, *dhcp_buff2
, *dhcp_buff3
;
793 struct ping_result
*ping_results
;
795 struct dhcp_bridge
*bridges
;
799 struct iovec outpacket
;
800 int dhcp6fd
, icmp6fd
;
803 /* void * here to avoid depending on dbus headers outside dbus.c */
806 struct watch
*watches
;
810 struct tftp_transfer
*tftp_trans
, *tftp_done_trans
;
812 /* utility string buffer, hold max sized IP address as string */
818 void cache_init(void);
819 void log_query(unsigned int flags
, char *name
, struct all_addr
*addr
, char *arg
);
820 char *record_source(int index
);
821 void querystr(char *str
, unsigned short type
);
822 struct crec
*cache_find_by_addr(struct crec
*crecp
,
823 struct all_addr
*addr
, time_t now
,
824 unsigned short prot
);
825 struct crec
*cache_find_by_name(struct crec
*crecp
,
826 char *name
, time_t now
, unsigned short prot
);
827 void cache_end_insert(void);
828 void cache_start_insert(void);
829 struct crec
*cache_insert(char *name
, struct all_addr
*addr
,
830 time_t now
, unsigned long ttl
, unsigned short flags
);
831 void cache_reload(void);
832 void cache_add_dhcp_entry(char *host_name
, int prot
, struct all_addr
*host_address
, time_t ttd
);
833 struct in_addr
a_record_from_hosts(char *name
, time_t now
);
834 void cache_unhash_dhcp(void);
835 void dump_cache(time_t now
);
836 char *cache_get_name(struct crec
*crecp
);
837 char *get_domain(struct in_addr addr
);
839 char *get_domain6(struct in6_addr
*addr
);
843 unsigned int extract_request(struct dns_header
*header
, size_t qlen
,
844 char *name
, unsigned short *typep
);
845 size_t setup_reply(struct dns_header
*header
, size_t qlen
,
846 struct all_addr
*addrp
, unsigned int flags
,
847 unsigned long local_ttl
);
848 int extract_addresses(struct dns_header
*header
, size_t qlen
, char *namebuff
,
849 time_t now
, int is_sign
, int checkrebind
, int checking_disabled
);
850 size_t answer_request(struct dns_header
*header
, char *limit
, size_t qlen
,
851 struct in_addr local_addr
, struct in_addr local_netmask
, time_t now
);
852 int check_for_bogus_wildcard(struct dns_header
*header
, size_t qlen
, char *name
,
853 struct bogus_addr
*addr
, time_t now
);
854 unsigned char *find_pseudoheader(struct dns_header
*header
, size_t plen
,
855 size_t *len
, unsigned char **p
, int *is_sign
);
856 int check_for_local_domain(char *name
, time_t now
);
857 unsigned int questions_crc(struct dns_header
*header
, size_t plen
, char *buff
);
858 size_t resize_packet(struct dns_header
*header
, size_t plen
,
859 unsigned char *pheader
, size_t hlen
);
860 size_t add_mac(struct dns_header
*header
, size_t plen
, char *limit
, union mysockaddr
*l3
);
863 void rand_init(void);
864 unsigned short rand16(void);
865 int legal_hostname(char *c
);
866 char *canonicalise(char *s
, int *nomem
);
867 unsigned char *do_rfc1035_name(unsigned char *p
, char *sval
);
868 void *safe_malloc(size_t size
);
869 void safe_pipe(int *fd
, int read_noblock
);
870 void *whine_malloc(size_t size
);
871 int sa_len(union mysockaddr
*addr
);
872 int sockaddr_isequal(union mysockaddr
*s1
, union mysockaddr
*s2
);
873 int hostname_isequal(char *a
, char *b
);
874 time_t dnsmasq_time(void);
875 int is_same_net(struct in_addr a
, struct in_addr b
, struct in_addr mask
);
877 int is_same_net6(struct in6_addr
*a
, struct in6_addr
*b
, int prefixlen
);
878 u64
addr6part(struct in6_addr
*addr
);
879 void setaddr6part(struct in6_addr
*addr
, u64 host
);
881 int retry_send(void);
882 void prettyprint_time(char *buf
, unsigned int t
);
883 int prettyprint_addr(union mysockaddr
*addr
, char *buf
);
884 int parse_hex(char *in
, unsigned char *out
, int maxlen
,
885 unsigned int *wildcard_mask
, int *mac_type
);
886 int memcmp_masked(unsigned char *a
, unsigned char *b
, int len
,
888 int expand_buf(struct iovec
*iov
, size_t size
);
889 char *print_mac(char *buff
, unsigned char *mac
, int len
);
890 void bump_maxfd(int fd
, int *max
);
891 int read_write(int fd
, unsigned char *packet
, int size
, int rw
);
894 void die(char *message
, char *arg1
, int exit_code
);
895 int log_start(struct passwd
*ent_pw
, int errfd
);
896 int log_reopen(char *log_file
);
897 void my_syslog(int priority
, const char *format
, ...);
898 void set_log_writer(fd_set
*set
, int *maxfdp
);
899 void check_log_writer(fd_set
*set
);
900 void flush_log(void);
903 void read_opts (int argc
, char **argv
, char *compile_opts
);
904 char *option_string(int prot
, unsigned int opt
, unsigned char *val
,
905 int opt_len
, char *buf
, int buf_len
);
906 void reread_dhcp(void);
907 void set_option_bool(unsigned int opt
);
908 struct hostsfile
*expand_filelist(struct hostsfile
*list
);
911 void reply_query(int fd
, int family
, time_t now
);
912 void receive_query(struct listener
*listen
, time_t now
);
913 unsigned char *tcp_request(int confd
, time_t now
,
914 union mysockaddr
*local_addr
, struct in_addr netmask
);
915 void server_gone(struct server
*server
);
916 struct frec
*get_new_frec(time_t now
, int *wait
);
917 int send_from(int fd
, int nowild
, char *packet
, size_t len
,
918 union mysockaddr
*to
, struct all_addr
*source
,
922 int indextoname(int fd
, int index
, char *name
);
923 int local_bind(int fd
, union mysockaddr
*addr
, char *intname
, int is_tcp
);
924 int random_sock(int family
);
925 void pre_allocate_sfds(void);
926 int reload_servers(char *fname
);
927 void check_servers(void);
928 int enumerate_interfaces();
929 void create_wildcard_listeners(void);
930 void create_bound_listeners(int die
);
931 int is_dad_listeners(void);
932 int iface_check(int family
, struct all_addr
*addr
, char *name
);
934 struct in_addr
get_ifaddr(char *intr
);
936 int set_ipv6pktinfo(int fd
);
941 void dhcp_init(void);
942 void dhcp_packet(time_t now
, int pxe_fd
);
943 struct dhcp_context
*address_available(struct dhcp_context
*context
,
945 struct dhcp_netid
*netids
);
946 struct dhcp_context
*narrow_context(struct dhcp_context
*context
,
947 struct in_addr taddr
,
948 struct dhcp_netid
*netids
);
949 int address_allocate(struct dhcp_context
*context
,
950 struct in_addr
*addrp
, unsigned char *hwaddr
, int hw_len
,
951 struct dhcp_netid
*netids
, time_t now
);
952 int config_has_mac(struct dhcp_config
*config
, unsigned char *hwaddr
, int len
, int type
);
953 struct dhcp_config
*find_config(struct dhcp_config
*configs
,
954 struct dhcp_context
*context
,
955 unsigned char *clid
, int clid_len
,
956 unsigned char *hwaddr
, int hw_len
,
957 int hw_type
, char *hostname
);
958 void dhcp_read_ethers(void);
959 struct dhcp_config
*config_find_by_address(struct dhcp_config
*configs
, struct in_addr addr
);
960 char *host_from_dns(struct in_addr addr
);
965 void lease_update_file(time_t now
);
966 void lease_update_dns(int force
);
967 void lease_init(time_t now
);
968 struct dhcp_lease
*lease4_allocate(struct in_addr addr
);
970 struct dhcp_lease
*lease6_allocate(struct in6_addr
*addrp
, int lease_type
);
971 struct dhcp_lease
*lease6_find(unsigned char *clid
, int clid_len
,
972 int lease_type
, int iaid
, struct in6_addr
*addr
);
973 struct dhcp_lease
*lease6_find_by_addr(struct in6_addr
*net
, int prefix
, u64 addr
);
974 u64
lease_find_max_addr6(struct dhcp_context
*context
);
975 void lease_ping_reply(struct in6_addr
*sender
, unsigned char *packet
, char *interface
);
977 void lease_set_hwaddr(struct dhcp_lease
*lease
, unsigned char *hwaddr
,
978 unsigned char *clid
, int hw_len
, int hw_type
, int clid_len
, time_t now
);
979 void lease_set_hostname(struct dhcp_lease
*lease
, char *name
, int auth
, char *domain
, char *config_domain
);
980 void lease_set_expires(struct dhcp_lease
*lease
, unsigned int len
, time_t now
);
981 void lease_set_interface(struct dhcp_lease
*lease
, int interface
, time_t now
);
982 struct dhcp_lease
*lease_find_by_client(unsigned char *hwaddr
, int hw_len
, int hw_type
,
983 unsigned char *clid
, int clid_len
);
984 struct dhcp_lease
*lease_find_by_addr(struct in_addr addr
);
985 struct in_addr
lease_find_max_addr(struct dhcp_context
*context
);
986 void lease_prune(struct dhcp_lease
*target
, time_t now
);
987 void lease_update_from_configs(void);
988 int do_script_run(time_t now
);
989 void rerun_scripts(void);
990 void lease_find_interfaces(time_t now
);
992 void lease_add_extradata(struct dhcp_lease
*lease
, unsigned char *data
,
993 unsigned int len
, int delim
);
999 size_t dhcp_reply(struct dhcp_context
*context
, char *iface_name
, int int_index
,
1000 size_t sz
, time_t now
, int unicast_dest
, int *is_inform
, int pxe_fd
, struct in_addr fallback
);
1001 unsigned char *extended_hwaddr(int hwtype
, int hwlen
, unsigned char *hwaddr
,
1002 int clid_len
, unsigned char *clid
, int *len_out
);
1007 int make_icmp_sock(void);
1008 int icmp_ping(struct in_addr addr
);
1010 void send_alarm(time_t event
, time_t now
);
1011 void send_event(int fd
, int event
, int data
, char *msg
);
1012 void clear_cache_and_reload(time_t now
);
1013 void poll_resolv(int force
, int do_reload
, time_t now
);
1016 #ifdef HAVE_LINUX_NETWORK
1017 void netlink_init(void);
1018 void netlink_multicast(void);
1022 #ifdef HAVE_BSD_NETWORK
1023 void init_bpf(void);
1024 void send_via_bpf(struct dhcp_packet
*mess
, size_t len
,
1025 struct in_addr iface_addr
, struct ifreq
*ifr
);
1028 /* bpf.c or netlink.c */
1029 int iface_enumerate(int family
, void *parm
, int (callback
)());
1033 char *dbus_init(void);
1034 void check_dbus_listeners(fd_set
*rset
, fd_set
*wset
, fd_set
*eset
);
1035 void set_dbus_listeners(int *maxfdp
, fd_set
*rset
, fd_set
*wset
, fd_set
*eset
);
1037 void emit_dbus_signal(int action
, struct dhcp_lease
*lease
, char *hostname
);
1042 #if defined(HAVE_SCRIPT)
1043 int create_helper(int event_fd
, int err_fd
, uid_t uid
, gid_t gid
, long max_fd
);
1044 void helper_write(void);
1045 void queue_script(int action
, struct dhcp_lease
*lease
,
1046 char *hostname
, time_t now
);
1048 void queue_tftp(off_t file_len
, char *filename
, union mysockaddr
*peer
);
1050 int helper_buf_empty(void);
1055 void tftp_request(struct listener
*listen
, time_t now
);
1056 void check_tftp_listeners(fd_set
*rset
, time_t now
);
1057 int do_tftp_script_run(void);
1061 #ifdef HAVE_CONNTRACK
1062 int get_incoming_mark(union mysockaddr
*peer_addr
, struct all_addr
*local_addr
,
1063 int istcp
, unsigned int *markp
);
1068 void dhcp6_init(void);
1069 void dhcp6_packet(time_t now
);
1070 int address6_allocate(struct dhcp_context
*context
, unsigned char *clid
, int clid_len
,
1071 int serial
, struct dhcp_netid
*netids
, struct in6_addr
*ans
);
1072 struct dhcp_context
*address6_available(struct dhcp_context
*context
,
1073 struct in6_addr
*taddr
,
1074 struct dhcp_netid
*netids
);
1075 struct dhcp_context
*narrow_context6(struct dhcp_context
*context
,
1076 struct in6_addr
*taddr
,
1077 struct dhcp_netid
*netids
);
1078 struct dhcp_config
*find_config6(struct dhcp_config
*configs
,
1079 struct dhcp_context
*context
,
1080 unsigned char *duid
, int duid_len
,
1082 struct dhcp_config
*config_find_by_address6(struct dhcp_config
*configs
, struct in6_addr
*net
,
1083 int prefix
, u64 addr
);
1084 void make_duid(time_t now
);
1089 unsigned short dhcp6_reply(struct dhcp_context
*context
, int interface
, char *iface_name
,
1090 struct in6_addr
*fallback
, size_t sz
, int is_multicast
, time_t now
);
1095 void dhcp_common_init(void);
1096 ssize_t
recv_dhcp_packet(int fd
, struct msghdr
*msg
);
1097 struct dhcp_netid
*run_tag_if(struct dhcp_netid
*input
);
1098 struct dhcp_netid
*option_filter(struct dhcp_netid
*tags
, struct dhcp_netid
*context_tags
,
1099 struct dhcp_opt
*opts
);
1100 int match_netid(struct dhcp_netid
*check
, struct dhcp_netid
*pool
, int negonly
);
1101 char *strip_hostname(char *hostname
);
1102 void log_tags(struct dhcp_netid
*netid
, u32 xid
);
1103 int match_bytes(struct dhcp_opt
*o
, unsigned char *p
, int len
);
1104 void dhcp_update_configs(struct dhcp_config
*configs
);
1105 void check_dhcp_hosts(int fatal
);
1106 void display_opts(void);
1107 u16
lookup_dhcp_opt(int prot
, char *name
);
1108 u16
lookup_dhcp_len(int prot
, u16 val
);
1109 char *option_string(int prot
, unsigned int opt
, unsigned char *val
,
1110 int opt_len
, char *buf
, int buf_len
);
1111 #ifdef HAVE_LINUX_NETWORK
1112 void bindtodevice(int fd
);
1115 void display_opts6(void);
1116 void join_multicast(void);
1122 void end_opt6(int container
);
1123 int save_counter(int newval
);
1124 void *expand(size_t headroom
);
1125 int new_opt6(int opt
);
1126 void *put_opt6(void *data
, size_t len
);
1127 void put_opt6_long(unsigned int val
);
1128 void put_opt6_short(unsigned int val
);
1129 void put_opt6_char(unsigned int val
);
1130 void put_opt6_string(char *s
);
1135 void ra_init(time_t now
);
1136 void icmp6_packet(void);
1137 time_t periodic_ra(time_t now
);
1138 void ra_start_unsolicted(time_t now
, struct dhcp_context
*context
);
1143 void build_subnet_map(void);
1144 void slaac_add_addrs(struct dhcp_lease
*lease
, time_t now
);
1145 time_t periodic_slaac(time_t now
, struct dhcp_lease
*leases
);
1146 void slaac_ping_reply(struct in6_addr
*sender
, unsigned char *packet
, char *interface
, struct dhcp_lease
*leases
);
1147 void schedule_subnet_map(void);