1 /* dnsmasq is Copyright (c) 2000-2010 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) 2000-2010 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__)
28 # include <features.h>
31 /* Need these defined early */
32 #if defined(__sun) || defined(__sun__)
34 # define __EXTENSIONS__
37 /* get these before config.h for IPv6 stuff... */
38 #include <sys/types.h>
39 #include <sys/socket.h>
40 #include <netinet/in.h>
44 # include <arpa/nameser_compat.h>
46 # include <arpa/nameser.h>
54 #define gettext_noop(S) (S)
60 # define _(S) gettext(S)
63 #include <arpa/inet.h>
65 #include <sys/ioctl.h>
66 #if defined(HAVE_SOLARIS_NETWORK)
67 # include <sys/sockio.h>
69 #include <sys/select.h>
75 #if defined(HAVE_SOLARIS_NETWORK) && !defined(ifr_mtu)
76 /* Some solaris net/if./h omit this. */
77 # define ifr_mtu ifr_ifru.ifru_metric
92 #if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__sun__) || defined (__sun)
93 # include <netinet/if_ether.h>
95 # include <net/ethernet.h>
97 #include <net/if_arp.h>
98 #include <netinet/in_systm.h>
99 #include <netinet/ip.h>
100 #include <netinet/ip_icmp.h>
104 #ifndef HAVE_LINUX_NETWORK
105 # include <net/if_dl.h>
108 #if defined(HAVE_LINUX_NETWORK)
109 #include <linux/capability.h>
110 /* There doesn't seem to be a universally-available
111 userpace header for these. */
112 extern int capset(cap_user_header_t header
, cap_user_data_t data
);
113 extern int capget(cap_user_header_t header
, cap_user_data_t data
);
114 #define LINUX_CAPABILITY_VERSION_1 0x19980330
115 #define LINUX_CAPABILITY_VERSION_2 0x20071026
116 #define LINUX_CAPABILITY_VERSION_3 0x20080522
118 #include <linux/prctl.h>
119 #elif defined(HAVE_SOLARIS_NETWORK)
123 /* daemon is function in the C library.... */
124 #define daemon dnsmasq_daemon
126 /* Async event queue */
131 #define EVENT_RELOAD 1
133 #define EVENT_ALARM 3
135 #define EVENT_CHILD 5
136 #define EVENT_REOPEN 6
137 #define EVENT_EXITED 7
138 #define EVENT_KILLED 8
139 #define EVENT_EXEC_ERR 9
140 #define EVENT_PIPE_ERR 10
141 #define EVENT_USER_ERR 11
142 #define EVENT_CAP_ERR 12
143 #define EVENT_PIDFILE 13
144 #define EVENT_HUSER_ERR 14
145 #define EVENT_GROUP_ERR 15
147 #define EVENT_LOG_ERR 17
148 #define EVENT_FORK_ERR 18
157 #define EC_INIT_OFFSET 10
159 /* Min buffer size: we check after adding each record, so there must be
160 memory for the largest packet, and the largest record so the
161 min for DNS is PACKETSZ+MAXDNAME+RRFIXEDSZ which is < 1000.
162 This might be increased is EDNS packet size if greater than the minimum.
164 #define DNSMASQ_PACKETSZ PACKETSZ+MAXDNAME+RRFIXEDSZ
166 #define OPT_BOGUSPRIV (1u<<0)
167 #define OPT_FILTER (1u<<1)
168 #define OPT_LOG (1u<<2)
169 #define OPT_SELFMX (1u<<3)
170 #define OPT_NO_HOSTS (1u<<4)
171 #define OPT_NO_POLL (1u<<5)
172 #define OPT_DEBUG (1u<<6)
173 #define OPT_ORDER (1u<<7)
174 #define OPT_NO_RESOLV (1u<<8)
175 #define OPT_EXPAND (1u<<9)
176 #define OPT_LOCALMX (1u<<10)
177 #define OPT_NO_NEG (1u<<11)
178 #define OPT_NODOTS_LOCAL (1u<<12)
179 #define OPT_NOWILD (1u<<13)
180 #define OPT_ETHERS (1u<<14)
181 #define OPT_RESOLV_DOMAIN (1u<<15)
182 #define OPT_NO_FORK (1u<<16)
183 #define OPT_AUTHORITATIVE (1u<<17)
184 #define OPT_LOCALISE (1u<<18)
185 #define OPT_DBUS (1u<<19)
186 #define OPT_DHCP_FQDN (1u<<20)
187 #define OPT_NO_PING (1u<<21)
188 #define OPT_LEASE_RO (1u<<22)
189 #define OPT_ALL_SERVERS (1u<<23)
190 #define OPT_RELOAD (1u<<24)
191 #define OPT_LOCAL_REBIND (1u<<25)
192 #define OPT_TFTP_SECURE (1u<<26)
193 #define OPT_TFTP_NOBLOCK (1u<<27)
194 #define OPT_LOG_OPTS (1u<<28)
195 #define OPT_TFTP_APREF (1u<<29)
196 #define OPT_NO_OVERRIDE (1u<<30)
197 #define OPT_NO_REBIND (1u<<31)
199 /* extra flags for my_syslog, we use a couple of facilities since they are known
200 not to occupy the same bits as priorities, no matter how syslog.h is set up. */
201 #define MS_TFTP LOG_USER
202 #define MS_DHCP LOG_DAEMON
206 struct in_addr addr4
;
208 struct in6_addr addr6
;
215 struct bogus_addr
*next
;
218 /* dns doctor param */
220 struct in_addr in
, end
, out
, mask
;
224 struct mx_srv_record
{
226 int issrv
, srvport
, priority
, weight
;
228 struct mx_srv_record
*next
;
232 char *name
, *replace
, *regexp
, *services
, *flags
;
233 unsigned int order
, pref
;
239 unsigned short class, len
;
240 struct txt_record
*next
;
245 struct ptr_record
*next
;
249 char *alias
, *target
;
253 struct interface_name
{
254 char *name
; /* domain name */
255 char *intr
; /* interface name */
256 struct interface_name
*next
;
261 union bigname
*next
; /* freelist */
265 struct crec
*next
, *prev
, *hash_next
;
266 time_t ttd
; /* time to die */
269 struct all_addr addr
;
275 unsigned short flags
;
277 char sname
[SMALLDNAME
];
278 union bigname
*bname
;
292 #define F_BIGNAME 512
293 #define F_UPSTREAM 1024
294 #define F_SERVER 2048
295 #define F_NXDOMAIN 4096
297 #define F_CNAME 16384
298 #define F_NOERR 32768
300 /* struct sockaddr is not large enough to hold any address,
301 and specifically not big enough to hold an IPv6 address.
302 Blech. Roll our own. */
305 struct sockaddr_in in
;
306 #if defined(HAVE_IPV6)
307 struct sockaddr_in6 in6
;
311 #define SERV_FROM_RESOLV 1 /* 1 for servers from resolv, 0 for command line. */
312 #define SERV_NO_ADDR 2 /* no server, this domain is local only */
313 #define SERV_LITERAL_ADDRESS 4 /* addr is the answer, not the server */
314 #define SERV_HAS_DOMAIN 8 /* server for one domain only */
315 #define SERV_HAS_SOURCE 16 /* source address defined */
316 #define SERV_FOR_NODOTS 32 /* server for names with no domain part only */
317 #define SERV_WARNED_RECURSIVE 64 /* avoid warning spam */
318 #define SERV_FROM_DBUS 128 /* 1 if source is DBus */
319 #define SERV_MARK 256 /* for mark-and-delete */
320 #define SERV_TYPE (SERV_HAS_DOMAIN | SERV_FOR_NODOTS)
321 #define SERV_COUNTED 512 /* workspace for log code */
322 #define SERV_USE_RESOLV 1024 /* forward this domain in the normal way */
323 #define SERV_NO_REBIND 2048 /* inhibit dns-rebind protection */
327 union mysockaddr source_addr
;
328 char interface
[IF_NAMESIZE
+1];
329 struct serverfd
*next
;
334 unsigned short refcount
, family
;
338 union mysockaddr addr
, source_addr
;
339 char interface
[IF_NAMESIZE
+1];
340 struct serverfd
*sfd
;
341 char *domain
; /* set if this server only handles a domain. */
343 unsigned int queries
, failed_queries
;
348 union mysockaddr addr
;
349 struct in_addr netmask
; /* only valid for IPv4 */
356 int fd
, tcpfd
, tftpfd
, family
;
357 struct irec
*iface
; /* only valid for non-wildcard */
358 struct listener
*next
;
361 /* interface and address parms from command line. */
364 union mysockaddr addr
;
369 /* resolv-file parms from command-line */
371 struct resolvc
*next
;
372 int is_default
, logged
;
377 /* adn-hosts parms from command-line */
379 #define AH_INACTIVE 2
381 struct hostsfile
*next
;
384 int index
; /* matches to cache entries for logging */
388 union mysockaddr source
;
389 struct all_addr dest
;
390 struct server
*sentto
; /* NULL means free */
396 unsigned short orig_id
, new_id
;
397 int fd
, forwardall
, norebind
;
403 /* actions in the daemon->helper RPC */
405 #define ACTION_OLD_HOSTNAME 2
409 #define DHCP_CHADDR_MAX 16
412 int clid_len
; /* length of client identifier */
413 unsigned char *clid
; /* clientid */
414 char *hostname
, *fqdn
; /* name from client-hostname option or config */
415 char *old_hostname
; /* hostname before it moved to another lease */
416 char auth_name
; /* hostname came from config, not from client */
417 char new; /* newly created */
418 char changed
; /* modified */
419 char aux_changed
; /* CLID or expiry changed */
420 time_t expires
; /* lease expiry */
421 #ifdef HAVE_BROKEN_RTC
424 int hwaddr_len
, hwaddr_type
;
425 unsigned char hwaddr
[DHCP_CHADDR_MAX
];
426 struct in_addr addr
, override
, giaddr
;
427 unsigned char *extradata
;
428 unsigned int extradata_len
, extradata_size
;
430 struct dhcp_lease
*next
;
435 struct dhcp_netid
*next
;
438 struct dhcp_netid_list
{
439 struct dhcp_netid
*list
;
440 struct dhcp_netid_list
*next
;
444 struct dhcp_netid_list
*set
;
445 struct dhcp_netid
*tag
;
449 struct hwaddr_config
{
450 int hwaddr_len
, hwaddr_type
;
451 unsigned char hwaddr
[DHCP_CHADDR_MAX
];
452 unsigned int wildcard_mask
;
453 struct hwaddr_config
*next
;
458 int clid_len
; /* length of client identifier */
459 unsigned char *clid
; /* clientid */
460 char *hostname
, *domain
;
461 struct dhcp_netid_list
*netid
;
464 unsigned int lease_time
;
465 struct hwaddr_config
*hwaddr
;
466 struct dhcp_config
*next
;
469 #define CONFIG_DISABLE 1
470 #define CONFIG_CLID 2
471 #define CONFIG_TIME 8
472 #define CONFIG_NAME 16
473 #define CONFIG_ADDR 32
474 #define CONFIG_NOCLID 128
475 #define CONFIG_FROM_ETHERS 256 /* entry created by /etc/ethers */
476 #define CONFIG_ADDR_HOSTS 512 /* address added by from /etc/hosts */
477 #define CONFIG_DECLINED 1024 /* address declined by client */
478 #define CONFIG_BANK 2048 /* from dhcp hosts file */
484 unsigned int wildcard_mask
;
485 unsigned char *vendor_class
;
488 struct dhcp_netid
*netid
;
489 struct dhcp_opt
*next
;
493 #define DHOPT_STRING 2
494 #define DHOPT_ENCAPSULATE 4
495 #define DHOPT_ENCAP_MATCH 8
496 #define DHOPT_FORCE 16
497 #define DHOPT_BANK 32
498 #define DHOPT_ENCAP_DONE 64
499 #define DHOPT_MATCH 128
500 #define DHOPT_VENDOR 256
501 #define DHOPT_HEX 512
502 #define DHOPT_VENDOR_MATCH 1024
503 #define DHOPT_RFC3925 2048
507 struct in_addr next_server
;
508 struct dhcp_netid
*netid
;
509 struct dhcp_boot
*next
;
513 unsigned short CSA
, type
;
514 char *menu
, *basename
;
515 struct in_addr server
;
516 struct dhcp_netid
*netid
;
517 struct pxe_service
*next
;
520 #define MATCH_VENDOR 1
522 #define MATCH_CIRCUIT 3
523 #define MATCH_REMOTE 4
524 #define MATCH_SUBSCRIBER 5
526 /* vendorclass, userclass, remote-id or cicuit-id */
528 int len
, match_type
, option
;
530 struct dhcp_netid netid
;
531 struct dhcp_vendor
*next
;
536 int hwaddr_len
, hwaddr_type
;
537 unsigned char hwaddr
[DHCP_CHADDR_MAX
];
538 struct dhcp_netid netid
;
539 struct dhcp_mac
*next
;
543 char iface
[IF_NAMESIZE
];
544 struct dhcp_bridge
*alias
, *next
;
549 struct in_addr start
, end
;
550 struct cond_domain
*next
;
553 struct dhcp_context
{
554 unsigned int lease_time
, addr_epoch
;
555 struct in_addr netmask
, broadcast
;
556 struct in_addr local
, router
;
557 struct in_addr start
, end
; /* range of available addresses */
560 struct dhcp_netid netid
, *filter
;
561 struct dhcp_context
*next
, *current
;
564 #define CONTEXT_STATIC 1
565 #define CONTEXT_NETMASK 2
566 #define CONTEXT_BRDCAST 4
567 #define CONTEXT_PROXY 8
570 typedef unsigned char u8
;
571 typedef unsigned short u16
;
572 typedef unsigned int u32
;
576 u8 op
, htype
, hlen
, hops
;
579 struct in_addr ciaddr
, yiaddr
, siaddr
, giaddr
;
580 u8 chaddr
[DHCP_CHADDR_MAX
], sname
[64], file
[128];
587 struct ping_result
*next
;
598 struct tftp_transfer
{
602 unsigned int block
, blocksize
, expansion
;
604 struct sockaddr_in peer
;
605 char opt_blocksize
, opt_transize
, netascii
, carrylf
;
606 struct tftp_file
*file
;
607 struct tftp_transfer
*next
;
612 struct addr_list
*next
;
615 struct interface_list
{
617 struct interface_list
*next
;
623 struct tftp_prefix
*next
;
627 extern struct daemon
{
628 /* datastuctures representing the command-line and
629 config file arguments. All set (including defaults)
632 unsigned int options
;
633 struct resolvc default_resolv
, *resolv_files
;
635 struct mx_srv_record
*mxnames
;
637 struct txt_record
*txt
;
638 struct ptr_record
*ptr
;
639 struct cname
*cnames
;
640 struct interface_name
*int_names
;
643 char *username
, *groupname
, *scriptuser
;
644 int group_set
, osport
;
646 struct cond_domain
*cond_domain
;
648 char *lease_change_command
;
649 struct iname
*if_names
, *if_addrs
, *if_except
, *dhcp_except
;
650 struct bogus_addr
*bogus_addr
;
651 struct server
*servers
;
652 int log_fac
; /* log facility */
653 char *log_file
; /* optional log file */
654 int max_logs
; /* queue limit */
655 int cachesize
, ftabsize
;
656 int port
, query_port
, min_port
;
657 unsigned long local_ttl
, neg_ttl
, max_ttl
;
658 struct hostsfile
*addn_hosts
;
659 struct dhcp_context
*dhcp
;
660 struct dhcp_config
*dhcp_conf
;
661 struct dhcp_opt
*dhcp_opts
, *dhcp_match
;
662 struct dhcp_vendor
*dhcp_vendors
;
663 struct dhcp_mac
*dhcp_macs
;
664 struct dhcp_boot
*boot_config
;
665 struct pxe_service
*pxe_services
;
666 struct tag_if
*tag_if
;
667 struct addr_list
*override_relays
;
670 struct dhcp_netid_list
*dhcp_ignore
, *dhcp_ignore_names
, *dhcp_gen_names
;
671 struct dhcp_netid_list
*force_broadcast
, *bootp_dynamic
;
672 char *dhcp_hosts_file
, *dhcp_opts_file
;
673 int dhcp_max
, tftp_max
;
674 int dhcp_server_port
, dhcp_client_port
;
675 int start_tftp_port
, end_tftp_port
;
676 unsigned int min_leasetime
;
677 struct doctor
*doctors
;
678 unsigned short edns_pktsz
;
680 struct tftp_prefix
*if_prefix
; /* per-interface TFTP prefixes */
681 struct interface_list
*tftp_interfaces
; /* interfaces for limited TFTP service */
684 /* globally used stuff for DNS */
685 char *packet
; /* packet buffer */
686 int packet_buff_sz
; /* size of above */
687 char *namebuff
; /* MAXDNAME size buffer */
688 unsigned int local_answer
, queries_forwarded
;
689 struct frec
*frec_list
;
690 struct serverfd
*sfds
;
691 struct irec
*interfaces
;
692 struct listener
*listeners
;
693 struct server
*last_server
;
696 struct server
*srv_save
; /* Used for resend on DoD */
697 size_t packet_len
; /* " " */
698 struct randfd
*rfd_save
; /* " " */
699 pid_t tcp_pids
[MAX_PROCS
];
700 struct randfd randomsocks
[RANDOM_SOCKS
];
704 int dhcpfd
, helperfd
, pxefd
;
705 #if defined(HAVE_LINUX_NETWORK)
707 #elif defined(HAVE_BSD_NETWORK)
708 int dhcp_raw_fd
, dhcp_icmp_fd
;
710 struct iovec dhcp_packet
;
711 char *dhcp_buff
, *dhcp_buff2
, *dhcp_buff3
;
712 struct ping_result
*ping_results
;
714 struct dhcp_bridge
*bridges
;
717 /* void * here to avoid depending on dbus headers outside dbus.c */
720 struct watch
*watches
;
724 struct tftp_transfer
*tftp_trans
;
729 void cache_init(void);
730 void log_query(unsigned short flags
, char *name
, struct all_addr
*addr
, char *arg
);
731 char *record_source(int index
);
732 void querystr(char *str
, unsigned short type
);
733 struct crec
*cache_find_by_addr(struct crec
*crecp
,
734 struct all_addr
*addr
, time_t now
,
735 unsigned short prot
);
736 struct crec
*cache_find_by_name(struct crec
*crecp
,
737 char *name
, time_t now
, unsigned short prot
);
738 void cache_end_insert(void);
739 void cache_start_insert(void);
740 struct crec
*cache_insert(char *name
, struct all_addr
*addr
,
741 time_t now
, unsigned long ttl
, unsigned short flags
);
742 void cache_reload(void);
743 void cache_add_dhcp_entry(char *host_name
, struct in_addr
*host_address
, time_t ttd
);
744 void cache_unhash_dhcp(void);
745 void dump_cache(time_t now
);
746 char *cache_get_name(struct crec
*crecp
);
747 char *get_domain(struct in_addr addr
);
750 unsigned short extract_request(HEADER
*header
, size_t qlen
,
751 char *name
, unsigned short *typep
);
752 size_t setup_reply(HEADER
*header
, size_t qlen
,
753 struct all_addr
*addrp
, unsigned short flags
,
754 unsigned long local_ttl
);
755 int extract_addresses(HEADER
*header
, size_t qlen
, char *namebuff
,
756 time_t now
, int is_sign
, int checkrebind
);
757 size_t answer_request(HEADER
*header
, char *limit
, size_t qlen
,
758 struct in_addr local_addr
, struct in_addr local_netmask
, time_t now
);
759 int check_for_bogus_wildcard(HEADER
*header
, size_t qlen
, char *name
,
760 struct bogus_addr
*addr
, time_t now
);
761 unsigned char *find_pseudoheader(HEADER
*header
, size_t plen
,
762 size_t *len
, unsigned char **p
, int *is_sign
);
763 int check_for_local_domain(char *name
, time_t now
);
764 unsigned int questions_crc(HEADER
*header
, size_t plen
, char *buff
);
765 size_t resize_packet(HEADER
*header
, size_t plen
,
766 unsigned char *pheader
, size_t hlen
);
769 void rand_init(void);
770 unsigned short rand16(void);
771 int legal_hostname(char *c
);
772 char *canonicalise(char *s
, int *nomem
);
773 unsigned char *do_rfc1035_name(unsigned char *p
, char *sval
);
774 void *safe_malloc(size_t size
);
775 void safe_pipe(int *fd
, int read_noblock
);
776 void *whine_malloc(size_t size
);
777 int sa_len(union mysockaddr
*addr
);
778 int sockaddr_isequal(union mysockaddr
*s1
, union mysockaddr
*s2
);
779 int hostname_isequal(char *a
, char *b
);
780 time_t dnsmasq_time(void);
781 int is_same_net(struct in_addr a
, struct in_addr b
, struct in_addr mask
);
782 int retry_send(void);
783 void prettyprint_time(char *buf
, unsigned int t
);
784 int prettyprint_addr(union mysockaddr
*addr
, char *buf
);
785 int parse_hex(char *in
, unsigned char *out
, int maxlen
,
786 unsigned int *wildcard_mask
, int *mac_type
);
787 int memcmp_masked(unsigned char *a
, unsigned char *b
, int len
,
789 int expand_buf(struct iovec
*iov
, size_t size
);
790 char *print_mac(char *buff
, unsigned char *mac
, int len
);
791 void bump_maxfd(int fd
, int *max
);
792 int read_write(int fd
, unsigned char *packet
, int size
, int rw
);
795 void die(char *message
, char *arg1
, int exit_code
);
796 int log_start(struct passwd
*ent_pw
, int errfd
);
797 int log_reopen(char *log_file
);
798 void my_syslog(int priority
, const char *format
, ...);
799 void set_log_writer(fd_set
*set
, int *maxfdp
);
800 void check_log_writer(fd_set
*set
);
801 void flush_log(void);
804 void read_opts (int argc
, char **argv
, char *compile_opts
);
805 char *option_string(unsigned char opt
, int *is_ip
, int *is_name
);
806 void reread_dhcp(void);
809 void reply_query(int fd
, int family
, time_t now
);
810 void receive_query(struct listener
*listen
, time_t now
);
811 unsigned char *tcp_request(int confd
, time_t now
,
812 struct in_addr local_addr
, struct in_addr netmask
);
813 void server_gone(struct server
*server
);
814 struct frec
*get_new_frec(time_t now
, int *wait
);
817 int indextoname(int fd
, int index
, char *name
);
818 int local_bind(int fd
, union mysockaddr
*addr
, char *intname
, int is_tcp
);
819 int random_sock(int family
);
820 void pre_allocate_sfds(void);
821 int reload_servers(char *fname
);
822 void check_servers(void);
823 int enumerate_interfaces();
824 struct listener
*create_wildcard_listeners(void);
825 struct listener
*create_bound_listeners(void);
826 int iface_check(int family
, struct all_addr
*addr
, char *name
, int *indexp
);
828 struct in_addr
get_ifaddr(char *intr
);
832 void dhcp_init(void);
833 void dhcp_packet(time_t now
, int pxe_fd
);
834 struct dhcp_context
*address_available(struct dhcp_context
*context
,
836 struct dhcp_netid
*netids
);
837 struct dhcp_context
*narrow_context(struct dhcp_context
*context
,
838 struct in_addr taddr
,
839 struct dhcp_netid
*netids
);
840 int match_netid(struct dhcp_netid
*check
, struct dhcp_netid
*pool
, int negonly
);
841 int address_allocate(struct dhcp_context
*context
,
842 struct in_addr
*addrp
, unsigned char *hwaddr
, int hw_len
,
843 struct dhcp_netid
*netids
, time_t now
);
844 struct dhcp_netid
*run_tag_if(struct dhcp_netid
*input
);
845 int config_has_mac(struct dhcp_config
*config
, unsigned char *hwaddr
, int len
, int type
);
846 struct dhcp_config
*find_config(struct dhcp_config
*configs
,
847 struct dhcp_context
*context
,
848 unsigned char *clid
, int clid_len
,
849 unsigned char *hwaddr
, int hw_len
,
850 int hw_type
, char *hostname
);
851 void dhcp_update_configs(struct dhcp_config
*configs
);
852 void dhcp_read_ethers(void);
853 void check_dhcp_hosts(int fatal
);
854 struct dhcp_config
*config_find_by_address(struct dhcp_config
*configs
, struct in_addr addr
);
855 char *strip_hostname(char *hostname
);
856 char *host_from_dns(struct in_addr addr
);
857 char *get_domain(struct in_addr addr
);
862 void lease_update_file(time_t now
);
863 void lease_update_dns();
864 void lease_init(time_t now
);
865 struct dhcp_lease
*lease_allocate(struct in_addr addr
);
866 void lease_set_hwaddr(struct dhcp_lease
*lease
, unsigned char *hwaddr
,
867 unsigned char *clid
, int hw_len
, int hw_type
, int clid_len
);
868 void lease_set_hostname(struct dhcp_lease
*lease
, char *name
, int auth
);
869 void lease_set_expires(struct dhcp_lease
*lease
, unsigned int len
, time_t now
);
870 void lease_set_interface(struct dhcp_lease
*lease
, int interface
);
871 struct dhcp_lease
*lease_find_by_client(unsigned char *hwaddr
, int hw_len
, int hw_type
,
872 unsigned char *clid
, int clid_len
);
873 struct dhcp_lease
*lease_find_by_addr(struct in_addr addr
);
874 void lease_prune(struct dhcp_lease
*target
, time_t now
);
875 void lease_update_from_configs(void);
876 int do_script_run(time_t now
);
877 void rerun_scripts(void);
882 size_t dhcp_reply(struct dhcp_context
*context
, char *iface_name
, int int_index
,
883 size_t sz
, time_t now
, int unicast_dest
, int *is_inform
, int pxe_fd
);
884 unsigned char *extended_hwaddr(int hwtype
, int hwlen
, unsigned char *hwaddr
,
885 int clid_len
, unsigned char *clid
, int *len_out
);
890 int make_icmp_sock(void);
891 int icmp_ping(struct in_addr addr
);
893 void send_event(int fd
, int event
, int data
);
894 void clear_cache_and_reload(time_t now
);
895 void poll_resolv(int force
, int do_reload
, time_t now
);
898 #ifdef HAVE_LINUX_NETWORK
899 void netlink_init(void);
900 void netlink_multicast(void);
904 #ifdef HAVE_BSD_NETWORK
906 void send_via_bpf(struct dhcp_packet
*mess
, size_t len
,
907 struct in_addr iface_addr
, struct ifreq
*ifr
);
910 /* bpf.c or netlink.c */
911 int iface_enumerate(void *parm
, int (*ipv4_callback
)(), int (*ipv6_callback
)());
915 char *dbus_init(void);
916 void check_dbus_listeners(fd_set
*rset
, fd_set
*wset
, fd_set
*eset
);
917 void set_dbus_listeners(int *maxfdp
, fd_set
*rset
, fd_set
*wset
, fd_set
*eset
);
919 void emit_dbus_signal(int action
, struct dhcp_lease
*lease
, char *hostname
);
924 #if defined(HAVE_DHCP) && !defined(NO_FORK)
925 int create_helper(int event_fd
, int err_fd
, uid_t uid
, gid_t gid
, long max_fd
);
926 void helper_write(void);
927 void queue_script(int action
, struct dhcp_lease
*lease
,
928 char *hostname
, time_t now
);
929 int helper_buf_empty(void);
934 void tftp_request(struct listener
*listen
, time_t now
);
935 void check_tftp_listeners(fd_set
*rset
, time_t now
);