release/src/router/dnsmasq/src/dnsmasq.h

   1 /* dnsmasq is Copyright (c) 2000-2013 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) 2000-2013 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
  54 typedef unsigned char u8;
  55 typedef unsigned short u16;
  56 typedef unsigned int u32;
  57 typedef unsigned long long u64;
  58
  59 #include "dns-protocol.h"
  60 #include "dhcp-protocol.h"
  61 #ifdef HAVE_DHCP6
  62 #include "dhcp6-protocol.h"
  63 #include "radv-protocol.h"
  64 #endif
  65
  66 #define gettext_noop(S) (S)
  67 #ifndef LOCALEDIR
  68 #  define _(S) (S)
  69 #else
  70 #  include <libintl.h>
  71 #  include <locale.h>
  72 #  define _(S) gettext(S)
  73 #endif
  74
  75 #include <arpa/inet.h>
  76 #include <sys/stat.h>
  77 #include <sys/ioctl.h>
  78 #if defined(HAVE_SOLARIS_NETWORK)
  79 #  include <sys/sockio.h>
  80 #endif
  81 #include <sys/select.h>
  82 #include <sys/wait.h>
  83 #include <sys/time.h>
  84 #include <sys/un.h>
  85 #include <limits.h>
  86 #include <net/if.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
  90 #endif
  91 #include <unistd.h>
  92 #include <stdio.h>
  93 #include <string.h>
  94 #include <stdlib.h>
  95 #include <fcntl.h>
  96 #include <ctype.h>
  97 #include <signal.h>
  98 #include <stddef.h>
  99 #include <time.h>
 100 #include <errno.h>
 101 #include <pwd.h>
 102 #include <grp.h>
 103 #include <stdarg.h>
 104 #if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__sun__) || defined (__sun) || defined (__ANDROID__)
 105 #  include <netinet/if_ether.h>
 106 #else
 107 #  include <net/ethernet.h>
 108 #endif
 109 #include <net/if_arp.h>
 110 #include <netinet/in_systm.h>
 111 #include <netinet/ip.h>
 112 #include <netinet/ip_icmp.h>
 113 #include <sys/uio.h>
 114 #include <syslog.h>
 115 #include <dirent.h>
 116 #ifndef HAVE_LINUX_NETWORK
 117 #  include <net/if_dl.h>
 118 #endif
 119
 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
 129
 130 #include <sys/prctl.h>
 131 #elif defined(HAVE_SOLARIS_NETWORK)
 132 #include <priv.h>
 133 #endif
 134
 135 /* daemon is function in the C library.... */
 136 #define daemon dnsmasq_daemon
 137
 138 /* Async event queue */
 139 struct event_desc {
 140   int event, data, msg_sz;
 141 };
 142
 143 #define EVENT_RELOAD    1
 144 #define EVENT_DUMP      2
 145 #define EVENT_ALARM     3
 146 #define EVENT_TERM      4
 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
 158 #define EVENT_DIE       16
 159 #define EVENT_LOG_ERR   17
 160 #define EVENT_FORK_ERR  18
 161 #define EVENT_LUA_ERR   19
 162 #define EVENT_TFTP_ERR  20
 163
 164 /* Exit codes. */
 165 #define EC_GOOD        0
 166 #define EC_BADCONF     1
 167 #define EC_BADNET      2
 168 #define EC_FILE        3
 169 #define EC_NOMEM       4
 170 #define EC_MISC        5
 171 #define EC_INIT_OFFSET 10
 172
 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.
 177 */
 178 #define DNSMASQ_PACKETSZ PACKETSZ+MAXDNAME+RRFIXEDSZ
 179
 180 /* Trust the compiler dead-code eliminator.... */
 181 #define option_bool(x) (((x) < 32) ? daemon->options & (1u << (x)) : daemon->options2 & (1u << ((x) - 32)))
 182
 183 #define OPT_BOGUSPRIV      0
 184 #define OPT_FILTER         1
 185 #define OPT_LOG            2
 186 #define OPT_SELFMX         3
 187 #define OPT_NO_HOSTS       4
 188 #define OPT_NO_POLL        5
 189 #define OPT_DEBUG          6
 190 #define OPT_ORDER          7
 191 #define OPT_NO_RESOLV      8
 192 #define OPT_EXPAND         9
 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
 202 #define OPT_DBUS           19
 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
 220 #define OPT_RA             37
 221 #define OPT_TFTP_LC        38
 222 #define OPT_CLEVERBIND     39
 223 #define OPT_TFTP           40
 224
 225 #ifdef HAVE_QUIET_DHCP  //Originally a TOMATO option
 226   #define OPT_QUIET_DHCP 41
 227   #define OPT_QUIET_DHCP6 42
 228   #define OPT_QUIET_RA   43
 229   #define OPT_LAST      44
 230 #else
 231   #define OPT_LAST      41
 232 #endif //HAVE_QUIET_DHCP
 233
 234
 235 /* extra flags for my_syslog, we use a couple of facilities since they are known
 236    not to occupy the same bits as priorities, no matter how syslog.h is set up. */
 237 #define MS_TFTP LOG_USER
 238 #define MS_DHCP LOG_DAEMON
 239
 240 struct all_addr {
 241   union {
 242     struct in_addr addr4;
 243 #ifdef HAVE_IPV6
 244     struct in6_addr addr6;
 245 #endif
 246   } addr;
 247 };
 248
 249 struct bogus_addr {
 250   struct in_addr addr;
 251   struct bogus_addr *next;
 252 };
 253
 254 /* dns doctor param */
 255 struct doctor {
 256   struct in_addr in, end, out, mask;
 257   struct doctor *next;
 258 };
 259
 260 struct mx_srv_record {
 261   char *name, *target;
 262   int issrv, srvport, priority, weight;
 263   unsigned int offset;
 264   struct mx_srv_record *next;
 265 };
 266
 267 struct naptr {
 268   char *name, *replace, *regexp, *services, *flags;
 269   unsigned int order, pref;
 270   struct naptr *next;
 271 };
 272
 273 struct txt_record {
 274   char *name;
 275   unsigned char *txt;
 276   unsigned short class, len;
 277   struct txt_record *next;
 278 };
 279
 280 struct ptr_record {
 281   char *name, *ptr;
 282   struct ptr_record *next;
 283 };
 284
 285 struct cname {
 286   char *alias, *target;
 287   struct cname *next;
 288 };
 289
 290 struct auth_zone {
 291   char *domain;
 292   struct subnet {
 293     int is6, prefixlen;
 294     struct in_addr addr4;
 295 #ifdef HAVE_IPV6
 296     struct in6_addr addr6;
 297 #endif
 298     struct subnet *next;
 299   } *subnet;
 300   struct auth_zone *next;
 301 };
 302
 303
 304 struct host_record {
 305   struct name_list {
 306     char *name;
 307     struct name_list *next;
 308   } *names;
 309   struct in_addr addr;
 310 #ifdef HAVE_IPV6
 311   struct in6_addr addr6;
 312 #endif
 313   struct host_record *next;
 314 };
 315
 316 struct interface_name {
 317   char *name; /* domain name */
 318   char *intr; /* interface name */
 319   struct addrlist {
 320     struct all_addr addr;
 321     struct addrlist *next;
 322   } *addr4;
 323 #ifdef HAVE_IPV6
 324   struct addrlist *addr6;
 325 #endif
 326   struct interface_name *next;
 327 };
 328
 329 union bigname {
 330   char name[MAXDNAME];
 331   union bigname *next; /* freelist */
 332 };
 333
 334 struct keydata {
 335   struct keydata *next;
 336   unsigned char key[KEYBLOCK_LEN];
 337 };
 338
 339 struct crec {
 340   struct crec *next, *prev, *hash_next;
 341   /* union is 16 bytes when doing IPv6, 8 bytes on 32 bit machines without IPv6 */
 342   union {
 343     struct all_addr addr;
 344     struct {
 345       struct crec *cache;
 346       int uid;
 347     } cname;
 348     struct {
 349       struct keydata *keydata;
 350       unsigned char algo;
 351       unsigned char digest; /* DS only */
 352       unsigned short flags_or_keyid; /* flags for DNSKEY, keyid for DS */
 353     } key;
 354   } addr;
 355   time_t ttd; /* time to die */
 356   /* used as keylen if F_DS or F_DNSKEY, index to source for F_HOSTS */
 357   int uid;
 358   unsigned short flags;
 359   union {
 360     char sname[SMALLDNAME];
 361     union bigname *bname;
 362     char *namep;
 363   } name;
 364 };
 365
 366 #define F_IMMORTAL  (1u<<0)
 367 #define F_NAMEP     (1u<<1)
 368 #define F_REVERSE   (1u<<2)
 369 #define F_FORWARD   (1u<<3)
 370 #define F_DHCP      (1u<<4)
 371 #define F_NEG       (1u<<5)
 372 #define F_HOSTS     (1u<<6)
 373 #define F_IPV4      (1u<<7)
 374 #define F_IPV6      (1u<<8)
 375 #define F_BIGNAME   (1u<<9)
 376 #define F_NXDOMAIN  (1u<<10)
 377 #define F_CNAME     (1u<<11)
 378 #define F_DNSKEY    (1u<<12)
 379 #define F_CONFIG    (1u<<13)
 380 #define F_DS        (1u<<14)
 381 #define F_DNSSECOK  (1u<<15)
 382
 383 /* below here are only valid as args to log_query: cache
 384    entries are limited to 16 bits */
 385 #define F_UPSTREAM  (1u<<16)
 386 #define F_RRNAME    (1u<<17)
 387 #define F_SERVER    (1u<<18)
 388 #define F_QUERY     (1u<<19)
 389 #define F_NOERR     (1u<<20)
 390 #define F_AUTH      (1u<<21)
 391
 392 /* composites */
 393 #define F_TYPE      (F_IPV4 | F_IPV6 | F_DNSKEY | F_DS) /* Only one may be set */
 394
 395
 396
 397 /* struct sockaddr is not large enough to hold any address,
 398    and specifically not big enough to hold an IPv6 address.
 399    Blech. Roll our own. */
 400 union mysockaddr {
 401   struct sockaddr sa;
 402   struct sockaddr_in in;
 403 #if defined(HAVE_IPV6)
 404   struct sockaddr_in6 in6;
 405 #endif
 406 };
 407
 408 /* bits in flag param to IPv6 callbacks from iface_enumerate() */
 409 #define IFACE_TENTATIVE   1
 410 #define IFACE_DEPRECATED  2
 411
 412
 413 #define SERV_FROM_RESOLV       1  /* 1 for servers from resolv, 0 for command line. */
 414 #define SERV_NO_ADDR           2  /* no server, this domain is local only */
 415 #define SERV_LITERAL_ADDRESS   4  /* addr is the answer, not the server */
 416 #define SERV_HAS_DOMAIN        8  /* server for one domain only */
 417 #define SERV_HAS_SOURCE       16  /* source address defined */
 418 #define SERV_FOR_NODOTS       32  /* server for names with no domain part only */
 419 #define SERV_WARNED_RECURSIVE 64  /* avoid warning spam */
 420 #define SERV_FROM_DBUS       128  /* 1 if source is DBus */
 421 #define SERV_MARK            256  /* for mark-and-delete */
 422 #define SERV_TYPE    (SERV_HAS_DOMAIN | SERV_FOR_NODOTS)
 423 #define SERV_COUNTED         512  /* workspace for log code */
 424 #define SERV_USE_RESOLV     1024  /* forward this domain in the normal way */
 425 #define SERV_NO_REBIND      2048  /* inhibit dns-rebind protection */
 426
 427 struct serverfd {
 428   int fd;
 429   union mysockaddr source_addr;
 430   char interface[IF_NAMESIZE+1];
 431   struct serverfd *next;
 432 };
 433
 434 struct randfd {
 435   int fd;
 436   unsigned short refcount, family;
 437 };
 438
 439 struct server {
 440   union mysockaddr addr, source_addr;
 441   char interface[IF_NAMESIZE+1];
 442   struct serverfd *sfd;
 443   char *domain; /* set if this server only handles a domain. */
 444   int flags, tcpfd;
 445   unsigned int queries, failed_queries;
 446   struct server *next;
 447 };
 448
 449 struct ipsets {
 450   char **sets;
 451   char *domain;
 452   struct ipsets *next;
 453 };
 454
 455 struct irec {
 456   union mysockaddr addr;
 457   struct in_addr netmask; /* only valid for IPv4 */
 458   int tftp_ok, dhcp_ok, mtu, done, dad, dns_auth, index, multicast_done;
 459   char *name;
 460   struct irec *next;
 461 };
 462
 463 struct listener {
 464   int fd, tcpfd, tftpfd, family;
 465   struct irec *iface; /* only sometimes valid for non-wildcard */
 466   struct listener *next;
 467 };
 468
 469 /* interface and address parms from command line. */
 470 struct iname {
 471   char *name;
 472   union mysockaddr addr;
 473   int used;
 474   struct iname *next;
 475 };
 476
 477 /* resolv-file parms from command-line */
 478 struct resolvc {
 479   struct resolvc *next;
 480   int is_default, logged;
 481   time_t mtime;
 482   char *name;
 483 };
 484
 485 /* adn-hosts parms from command-line (also dhcp-hostsfile and dhcp-optsfile */
 486 #define AH_DIR      1
 487 #define AH_INACTIVE 2
 488 struct hostsfile {
 489   struct hostsfile *next;
 490   int flags;
 491   char *fname;
 492   int index; /* matches to cache entries for logging */
 493 };
 494
 495 #define FREC_NOREBIND           1
 496 #define FREC_CHECKING_DISABLED  2
 497
 498 struct frec {
 499   union mysockaddr source;
 500   struct all_addr dest;
 501   struct server *sentto; /* NULL means free */
 502   struct randfd *rfd4;
 503 #ifdef HAVE_IPV6
 504   struct randfd *rfd6;
 505 #endif
 506   unsigned int iface;
 507   unsigned short orig_id, new_id;
 508   int fd, forwardall, flags;
 509   unsigned int crc;
 510   time_t time;
 511   struct frec *next;
 512 };
 513
 514 /* flags in top of length field for DHCP-option tables */
 515 #define OT_ADDR_LIST    0x8000
 516 #define OT_RFC1035_NAME 0x4000
 517 #define OT_INTERNAL     0x2000
 518 #define OT_NAME         0x1000
 519 #define OT_CSTRING      0x0800
 520 #define OT_DEC          0x0400
 521 #define OT_TIME         0x0200
 522
 523 /* actions in the daemon->helper RPC */
 524 #define ACTION_DEL           1
 525 #define ACTION_OLD_HOSTNAME  2
 526 #define ACTION_OLD           3
 527 #define ACTION_ADD           4
 528 #define ACTION_TFTP          5
 529
 530 #define LEASE_NEW            1  /* newly created */
 531 #define LEASE_CHANGED        2  /* modified */
 532 #define LEASE_AUX_CHANGED    4  /* CLID or expiry changed */
 533 #define LEASE_AUTH_NAME      8  /* hostname came from config, not from client */
 534 #define LEASE_USED          16  /* used this DHCPv6 transaction */
 535 #define LEASE_NA            32  /* IPv6 no-temporary lease */
 536 #define LEASE_TA            64  /* IPv6 temporary lease */
 537 #define LEASE_HAVE_HWADDR  128  /* Have set hwaddress */
 538
 539 struct dhcp_lease {
 540   int clid_len;          /* length of client identifier */
 541   unsigned char *clid;   /* clientid */
 542   char *hostname, *fqdn; /* name from client-hostname option or config */
 543   char *old_hostname;    /* hostname before it moved to another lease */
 544   int flags;
 545   time_t expires;        /* lease expiry */
 546 #ifdef HAVE_BROKEN_RTC
 547   unsigned int length;
 548 #endif
 549   int hwaddr_len, hwaddr_type; /* hw_type used for iaid in v6 */
 550   unsigned char hwaddr[DHCP_CHADDR_MAX]; /* also IPv6 address */
 551   struct in_addr addr, override, giaddr;
 552   unsigned char *extradata;
 553   unsigned int extradata_len, extradata_size;
 554   int last_interface;
 555 #ifdef HAVE_DHCP6
 556   struct slaac_address {
 557     struct in6_addr addr, local;
 558     time_t ping_time;
 559     int backoff; /* zero -> confirmed */
 560     struct slaac_address *next;
 561   } *slaac_address;
 562   int vendorclass_count;
 563 #endif
 564   struct dhcp_lease *next;
 565 };
 566
 567 struct dhcp_netid {
 568   char *net;
 569   struct dhcp_netid *next;
 570 };
 571
 572 struct dhcp_netid_list {
 573   struct dhcp_netid *list;
 574   struct dhcp_netid_list *next;
 575 };
 576
 577 struct tag_if {
 578   struct dhcp_netid_list *set;
 579   struct dhcp_netid *tag;
 580   struct tag_if *next;
 581 };
 582
 583 struct hwaddr_config {
 584   int hwaddr_len, hwaddr_type;
 585   unsigned char hwaddr[DHCP_CHADDR_MAX];
 586   unsigned int wildcard_mask;
 587   struct hwaddr_config *next;
 588 };
 589
 590 struct dhcp_config {
 591   unsigned int flags;
 592   int clid_len;          /* length of client identifier */
 593   unsigned char *clid;   /* clientid */
 594   char *hostname, *domain;
 595   struct dhcp_netid_list *netid;
 596 #ifdef HAVE_DHCP6
 597   struct in6_addr addr6;
 598 #endif
 599   struct in_addr addr;
 600   time_t decline_time;
 601   unsigned int lease_time;
 602   struct hwaddr_config *hwaddr;
 603   struct dhcp_config *next;
 604 };
 605
 606 #define have_config(config, mask) ((config) && ((config)->flags & (mask)))
 607
 608 #define CONFIG_DISABLE           1
 609 #define CONFIG_CLID              2
 610 #define CONFIG_TIME              8
 611 #define CONFIG_NAME             16
 612 #define CONFIG_ADDR             32
 613 #define CONFIG_NOCLID          128
 614 #define CONFIG_FROM_ETHERS     256    /* entry created by /etc/ethers */
 615 #define CONFIG_ADDR_HOSTS      512    /* address added by from /etc/hosts */
 616 #define CONFIG_DECLINED       1024    /* address declined by client */
 617 #define CONFIG_BANK           2048    /* from dhcp hosts file */
 618 #define CONFIG_ADDR6          4096
 619 #define CONFIG_WILDCARD       8192
 620
 621 struct dhcp_opt {
 622   int opt, len, flags;
 623   union {
 624     int encap;
 625     unsigned int wildcard_mask;
 626     unsigned char *vendor_class;
 627   } u;
 628   unsigned char *val;
 629   struct dhcp_netid *netid;
 630   struct dhcp_opt *next;
 631 };
 632
 633 #define DHOPT_ADDR               1
 634 #define DHOPT_STRING             2
 635 #define DHOPT_ENCAPSULATE        4
 636 #define DHOPT_ENCAP_MATCH        8
 637 #define DHOPT_FORCE             16
 638 #define DHOPT_BANK              32
 639 #define DHOPT_ENCAP_DONE        64
 640 #define DHOPT_MATCH            128
 641 #define DHOPT_VENDOR           256
 642 #define DHOPT_HEX              512
 643 #define DHOPT_VENDOR_MATCH    1024
 644 #define DHOPT_RFC3925         2048
 645 #define DHOPT_TAGOK           4096
 646 #define DHOPT_ADDR6           8192
 647
 648 struct dhcp_boot {
 649   char *file, *sname, *tftp_sname;
 650   struct in_addr next_server;
 651   struct dhcp_netid *netid;
 652   struct dhcp_boot *next;
 653 };
 654
 655 struct pxe_service {
 656   unsigned short CSA, type;
 657   char *menu, *basename, *sname;
 658   struct in_addr server;
 659   struct dhcp_netid *netid;
 660   struct pxe_service *next;
 661 };
 662
 663 #define MATCH_VENDOR     1
 664 #define MATCH_USER       2
 665 #define MATCH_CIRCUIT    3
 666 #define MATCH_REMOTE     4
 667 #define MATCH_SUBSCRIBER 5
 668
 669 /* vendorclass, userclass, remote-id or cicuit-id */
 670 struct dhcp_vendor {
 671   int len, match_type;
 672   unsigned int enterprise;
 673   char *data;
 674   struct dhcp_netid netid;
 675   struct dhcp_vendor *next;
 676 };
 677
 678 struct dhcp_mac {
 679   unsigned int mask;
 680   int hwaddr_len, hwaddr_type;
 681   unsigned char hwaddr[DHCP_CHADDR_MAX];
 682   struct dhcp_netid netid;
 683   struct dhcp_mac *next;
 684 };
 685
 686 struct dhcp_bridge {
 687   char iface[IF_NAMESIZE];
 688   struct dhcp_bridge *alias, *next;
 689 };
 690
 691 struct cond_domain {
 692   char *domain, *prefix;
 693   struct in_addr start, end;
 694 #ifdef HAVE_IPV6
 695   struct in6_addr start6, end6;
 696 #endif
 697   int is6;
 698   struct cond_domain *next;
 699 };
 700
 701 #ifdef OPTION6_PREFIX_CLASS
 702 struct prefix_class {
 703   int class;
 704   struct dhcp_netid tag;
 705   struct prefix_class *next;
 706 };
 707 #endif
 708
 709 struct dhcp_context {
 710   unsigned int lease_time, addr_epoch;
 711   struct in_addr netmask, broadcast;
 712   struct in_addr local, router;
 713   struct in_addr start, end; /* range of available addresses */
 714 #ifdef HAVE_DHCP6
 715   struct in6_addr start6, end6; /* range of available addresses */
 716   struct in6_addr local6;
 717   int prefix, if_index;
 718   unsigned int valid, preferred;
 719   time_t ra_time, ra_short_period_start;
 720   char *template_interface;
 721 #endif
 722   int flags;
 723   struct dhcp_netid netid, *filter;
 724   struct dhcp_context *next, *current;
 725 };
 726
 727 #define CONTEXT_STATIC         1
 728 #define CONTEXT_NETMASK        2
 729 #define CONTEXT_BRDCAST        4
 730 #define CONTEXT_PROXY          8
 731 #define CONTEXT_RA_ONLY       16
 732 #define CONTEXT_RA_DONE       32
 733 #define CONTEXT_RA_NAME       64
 734 #define CONTEXT_RA_STATELESS 128
 735 #define CONTEXT_DHCP         256
 736 #define CONTEXT_DEPRECATE    512
 737 #define CONTEXT_TEMPLATE    1024    /* create contexts using addresses */
 738 #define CONTEXT_CONSTRUCTED 2048
 739 #define CONTEXT_GC          4096
 740 #define CONTEXT_RA          8192
 741 #define CONTEXT_CONF_USED  16384
 742 #define CONTEXT_USED       32768
 743 #define CONTEXT_NOAUTH     65536
 744
 745 struct ping_result {
 746   struct in_addr addr;
 747   time_t time;
 748   unsigned int hash;
 749   struct ping_result *next;
 750 };
 751
 752 struct tftp_file {
 753   int refcount, fd;
 754   off_t size;
 755   dev_t dev;
 756   ino_t inode;
 757   char filename[];
 758 };
 759
 760 struct tftp_transfer {
 761   int sockfd;
 762   time_t timeout;
 763   int backoff;
 764   unsigned int block, blocksize, expansion;
 765   off_t offset;
 766   union mysockaddr peer;
 767   char opt_blocksize, opt_transize, netascii, carrylf;
 768   struct tftp_file *file;
 769   struct tftp_transfer *next;
 770 };
 771
 772 struct addr_list {
 773   struct in_addr addr;
 774   struct addr_list *next;
 775 };
 776
 777 struct tftp_prefix {
 778   char *interface;
 779   char *prefix;
 780   struct tftp_prefix *next;
 781 };
 782
 783
 784 extern struct daemon {
 785   /* datastuctures representing the command-line and
 786      config file arguments. All set (including defaults)
 787      in option.c */
 788
 789   unsigned int options, options2;
 790   struct resolvc default_resolv, *resolv_files;
 791   time_t last_resolv;
 792   struct mx_srv_record *mxnames;
 793   struct naptr *naptr;
 794   struct txt_record *txt, *rr;
 795   struct ptr_record *ptr;
 796   struct host_record *host_records, *host_records_tail;
 797   struct cname *cnames;
 798   struct auth_zone *auth_zones;
 799   struct interface_name *int_names;
 800   char *mxtarget;
 801   char *lease_file;
 802   char *username, *groupname, *scriptuser;
 803   char *luascript;
 804   char *authserver, *hostmaster;
 805   struct iname *authinterface;
 806   struct name_list *secondary_forward_server;
 807   int group_set, osport;
 808   char *domain_suffix;
 809   struct cond_domain *cond_domain, *synth_domains;
 810   char *runfile;
 811   char *lease_change_command;
 812   struct iname *if_names, *if_addrs, *if_except, *dhcp_except, *auth_peers;
 813   struct bogus_addr *bogus_addr;
 814   struct server *servers;
 815   struct ipsets *ipsets;
 816   int log_fac; /* log facility */
 817   char *log_file; /* optional log file */
 818   int max_logs;  /* queue limit */
 819   int cachesize, ftabsize;
 820   int port, query_port, min_port;
 821   unsigned long local_ttl, neg_ttl, max_ttl, max_cache_ttl, auth_ttl;
 822   struct hostsfile *addn_hosts;
 823   struct dhcp_context *dhcp, *dhcp6;
 824   struct dhcp_config *dhcp_conf;
 825   struct dhcp_opt *dhcp_opts, *dhcp_match, *dhcp_opts6, *dhcp_match6;
 826   struct dhcp_vendor *dhcp_vendors;
 827   struct dhcp_mac *dhcp_macs;
 828   struct dhcp_boot *boot_config;
 829   struct pxe_service *pxe_services;
 830   struct tag_if *tag_if;
 831   struct addr_list *override_relays;
 832   int override;
 833   int enable_pxe;
 834   int doing_ra, doing_dhcp6;
 835   struct dhcp_netid_list *dhcp_ignore, *dhcp_ignore_names, *dhcp_gen_names;
 836   struct dhcp_netid_list *force_broadcast, *bootp_dynamic;
 837   struct hostsfile *dhcp_hosts_file, *dhcp_opts_file;
 838   int dhcp_max, tftp_max;
 839   int dhcp_server_port, dhcp_client_port;
 840   int start_tftp_port, end_tftp_port;
 841   unsigned int min_leasetime;
 842   struct doctor *doctors;
 843   unsigned short edns_pktsz;
 844   char *tftp_prefix;
 845   struct tftp_prefix *if_prefix; /* per-interface TFTP prefixes */
 846   unsigned int duid_enterprise, duid_config_len;
 847   unsigned char *duid_config;
 848   char *dbus_name;
 849   unsigned long soa_sn, soa_refresh, soa_retry, soa_expiry;
 850 #ifdef OPTION6_PREFIX_CLASS
 851   struct prefix_class *prefix_classes;
 852 #endif
 853
 854   /* globally used stuff for DNS */
 855   char *packet; /* packet buffer */
 856   int packet_buff_sz; /* size of above */
 857   char *namebuff; /* MAXDNAME size buffer */
 858   unsigned int local_answer, queries_forwarded;
 859   struct frec *frec_list;
 860   struct serverfd *sfds;
 861   struct irec *interfaces;
 862   struct listener *listeners;
 863   struct server *last_server;
 864   time_t forwardtime;
 865   int forwardcount;
 866   struct server *srv_save; /* Used for resend on DoD */
 867   size_t packet_len;       /*      "        "        */
 868   struct randfd *rfd_save; /*      "        "        */
 869   pid_t tcp_pids[MAX_PROCS];
 870   struct randfd randomsocks[RANDOM_SOCKS];
 871   int v6pktinfo;
 872
 873   /* DHCP state */
 874   int dhcpfd, helperfd, pxefd;
 875 #if defined(HAVE_LINUX_NETWORK)
 876   int netlinkfd;
 877 #elif defined(HAVE_BSD_NETWORK)
 878   int dhcp_raw_fd, dhcp_icmp_fd;
 879 #endif
 880   struct iovec dhcp_packet;
 881   char *dhcp_buff, *dhcp_buff2, *dhcp_buff3;
 882   struct ping_result *ping_results;
 883   FILE *lease_stream;
 884   struct dhcp_bridge *bridges;
 885 #ifdef HAVE_DHCP6
 886   int duid_len;
 887   unsigned char *duid;
 888   struct iovec outpacket;
 889   int dhcp6fd, icmp6fd;
 890 #endif
 891   /* DBus stuff */
 892   /* void * here to avoid depending on dbus headers outside dbus.c */
 893   void *dbus;
 894 #ifdef HAVE_DBUS
 895   struct watch *watches;
 896 #endif
 897
 898   /* TFTP stuff */
 899   struct tftp_transfer *tftp_trans, *tftp_done_trans;
 900
 901   /* utility string buffer, hold max sized IP address as string */
 902   char *addrbuff;
 903
 904 } *daemon;
 905
 906 /* cache.c */
 907 void cache_init(void);
 908 void log_query(unsigned int flags, char *name, struct all_addr *addr, char *arg);
 909 char *record_source(int index);
 910 void querystr(char *desc, char *str, unsigned short type);
 911 struct crec *cache_find_by_addr(struct crec *crecp,
 912                                 struct all_addr *addr, time_t now,
 913                                 unsigned short prot);
 914 struct crec *cache_find_by_name(struct crec *crecp,
 915                                 char *name, time_t now, unsigned short  prot);
 916 void cache_end_insert(void);
 917 void cache_start_insert(void);
 918 struct crec *cache_insert(char *name, struct all_addr *addr,
 919                           time_t now, unsigned long ttl, unsigned short flags);
 920 void cache_reload(void);
 921 void cache_add_dhcp_entry(char *host_name, int prot, struct all_addr *host_address, time_t ttd);
 922 struct in_addr a_record_from_hosts(char *name, time_t now);
 923 void cache_unhash_dhcp(void);
 924 void dump_cache(time_t now);
 925 char *cache_get_name(struct crec *crecp);
 926 struct crec *cache_enumerate(int init);
 927 #ifdef HAVE_DNSSEC
 928 struct keydata *keydata_alloc(char *data, size_t len);
 929 void keydata_free(struct keydata *blocks);
 930 #endif
 931
 932 /* domain.c */
 933 char *get_domain(struct in_addr addr);
 934 #ifdef HAVE_IPV6
 935 char *get_domain6(struct in6_addr *addr);
 936 #endif
 937 int is_name_synthetic(int flags, char *name, struct all_addr *addr);
 938 int is_rev_synth(int flag, struct all_addr *addr, char *name);
 939
 940 /* rfc1035.c */
 941 unsigned int extract_request(struct dns_header *header, size_t qlen,
 942                                char *name, unsigned short *typep);
 943 size_t setup_reply(struct dns_header *header, size_t  qlen,
 944                    struct all_addr *addrp, unsigned int flags,
 945                    unsigned long local_ttl);
 946 int extract_addresses(struct dns_header *header, size_t qlen, char *namebuff,
 947                       time_t now, char **ipsets, int is_sign, int checkrebind,
 948                       int checking_disabled);
 949 size_t answer_request(struct dns_header *header, char *limit, size_t qlen,
 950                    struct in_addr local_addr, struct in_addr local_netmask, time_t now);
 951 int check_for_bogus_wildcard(struct dns_header *header, size_t qlen, char *name,
 952                              struct bogus_addr *addr, time_t now);
 953 unsigned char *find_pseudoheader(struct dns_header *header, size_t plen,
 954                                  size_t *len, unsigned char **p, int *is_sign);
 955 int check_for_local_domain(char *name, time_t now);
 956 unsigned int questions_crc(struct dns_header *header, size_t plen, char *buff);
 957 size_t resize_packet(struct dns_header *header, size_t plen,
 958                   unsigned char *pheader, size_t hlen);
 959 size_t add_mac(struct dns_header *header, size_t plen, char *limit, union mysockaddr *l3);
 960 int add_resource_record(struct dns_header *header, char *limit, int *truncp,
 961                         int nameoffset, unsigned char **pp, unsigned long ttl,
 962                         int *offset, unsigned short type, unsigned short class, char *format, ...);
 963 unsigned char *skip_questions(struct dns_header *header, size_t plen);
 964 int extract_name(struct dns_header *header, size_t plen, unsigned char **pp,
 965                  char *name, int isExtract, int extrabytes);
 966 int in_arpa_name_2_addr(char *namein, struct all_addr *addrp);
 967
 968 /* auth.c */
 969 #ifdef HAVE_AUTH
 970 size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t now, union mysockaddr *peer_addr);
 971 #endif
 972
 973 /* util.c */
 974 void rand_init(void);
 975 unsigned short rand16(void);
 976 int legal_hostname(char *c);
 977 char *canonicalise(char *s, int *nomem);
 978 unsigned char *do_rfc1035_name(unsigned char *p, char *sval);
 979 void *safe_malloc(size_t size);
 980 void safe_pipe(int *fd, int read_noblock);
 981 void *whine_malloc(size_t size);
 982 int sa_len(union mysockaddr *addr);
 983 int sockaddr_isequal(union mysockaddr *s1, union mysockaddr *s2);
 984 int hostname_isequal(const char *a, const char *b);
 985 time_t dnsmasq_time(void);
 986 int is_same_net(struct in_addr a, struct in_addr b, struct in_addr mask);
 987 #ifdef HAVE_IPV6
 988 int is_same_net6(struct in6_addr *a, struct in6_addr *b, int prefixlen);
 989 u64 addr6part(struct in6_addr *addr);
 990 void setaddr6part(struct in6_addr *addr, u64 host);
 991 #endif
 992 int retry_send(void);
 993 void prettyprint_time(char *buf, unsigned int t);
 994 int prettyprint_addr(union mysockaddr *addr, char *buf);
 995 int parse_hex(char *in, unsigned char *out, int maxlen,
 996               unsigned int *wildcard_mask, int *mac_type);
 997 int memcmp_masked(unsigned char *a, unsigned char *b, int len,
 998                   unsigned int mask);
 999 int expand_buf(struct iovec *iov, size_t size);
1000 char *print_mac(char *buff, unsigned char *mac, int len);
1001 void bump_maxfd(int fd, int *max);
1002 int read_write(int fd, unsigned char *packet, int size, int rw);
1003
1004 int wildcard_match(const char* wildcard, const char* match);
1005
1006 /* log.c */
1007 void die(char *message, char *arg1, int exit_code);
1008 int log_start(struct passwd *ent_pw, int errfd);
1009 int log_reopen(char *log_file);
1010 void my_syslog(int priority, const char *format, ...);
1011 void set_log_writer(fd_set *set, int *maxfdp);
1012 void check_log_writer(fd_set *set);
1013 void flush_log(void);
1014
1015 /* option.c */
1016 void read_opts (int argc, char **argv, char *compile_opts);
1017 char *option_string(int prot, unsigned int opt, unsigned char *val,
1018                     int opt_len, char *buf, int buf_len);
1019 void reread_dhcp(void);
1020 void set_option_bool(unsigned int opt);
1021 void reset_option_bool(unsigned int opt);
1022 struct hostsfile *expand_filelist(struct hostsfile *list);
1023 char *parse_server(char *arg, union mysockaddr *addr,
1024                    union mysockaddr *source_addr, char *interface, int *flags);
1025
1026 /* forward.c */
1027 void reply_query(int fd, int family, time_t now);
1028 void receive_query(struct listener *listen, time_t now);
1029 unsigned char *tcp_request(int confd, time_t now,
1030                            union mysockaddr *local_addr, struct in_addr netmask, int auth_dns);
1031 void server_gone(struct server *server);
1032 struct frec *get_new_frec(time_t now, int *wait);
1033 int send_from(int fd, int nowild, char *packet, size_t len,
1034                union mysockaddr *to, struct all_addr *source,
1035                unsigned int iface);
1036
1037 /* network.c */
1038 int indextoname(int fd, int index, char *name);
1039 int local_bind(int fd, union mysockaddr *addr, char *intname, int is_tcp);
1040 int random_sock(int family);
1041 void pre_allocate_sfds(void);
1042 int reload_servers(char *fname);
1043 void check_servers(void);
1044 int enumerate_interfaces(int reset);
1045 void create_wildcard_listeners(void);
1046 void create_bound_listeners(int die);
1047 int is_dad_listeners(void);
1048 int iface_check(int family, struct all_addr *addr, char *name, int *auth_dns);
1049 int loopback_exception(int fd, int family, struct all_addr *addr, char *name);
1050 int label_exception(int index, int family, struct all_addr *addr);
1051 int fix_fd(int fd);
1052 int tcp_interface(int fd, int af);
1053 #ifdef HAVE_IPV6
1054 int set_ipv6pktinfo(int fd);
1055 #endif
1056 #ifdef HAVE_DHCP6
1057 void join_multicast(int dienow);
1058 #endif
1059
1060 /* dhcp.c */
1061 #ifdef HAVE_DHCP
1062 void dhcp_init(void);
1063 void dhcp_packet(time_t now, int pxe_fd);
1064 struct dhcp_context *address_available(struct dhcp_context *context,
1065                                        struct in_addr addr,
1066                                        struct dhcp_netid *netids);
1067 struct dhcp_context *narrow_context(struct dhcp_context *context,
1068                                     struct in_addr taddr,
1069                                     struct dhcp_netid *netids);
1070 int address_allocate(struct dhcp_context *context,
1071                      struct in_addr *addrp, unsigned char *hwaddr, int hw_len,
1072                      struct dhcp_netid *netids, time_t now);
1073 int config_has_mac(struct dhcp_config *config, unsigned char *hwaddr, int len, int type);
1074 struct dhcp_config *find_config(struct dhcp_config *configs,
1075                                 struct dhcp_context *context,
1076                                 unsigned char *clid, int clid_len,
1077                                 unsigned char *hwaddr, int hw_len,
1078                                 int hw_type, char *hostname);
1079 void dhcp_read_ethers(void);
1080 struct dhcp_config *config_find_by_address(struct dhcp_config *configs, struct in_addr addr);
1081 char *host_from_dns(struct in_addr addr);
1082 #endif
1083
1084 /* lease.c */
1085 #ifdef HAVE_DHCP
1086 void lease_update_file(time_t now);
1087 void lease_update_dns(int force);
1088 void lease_init(time_t now);
1089 struct dhcp_lease *lease4_allocate(struct in_addr addr);
1090 #ifdef HAVE_DHCP6
1091 struct dhcp_lease *lease6_allocate(struct in6_addr *addrp, int lease_type);
1092 struct dhcp_lease *lease6_find(unsigned char *clid, int clid_len,
1093                                int lease_type, int iaid, struct in6_addr *addr);
1094 void lease6_reset(void);
1095 struct dhcp_lease *lease6_find_by_client(struct dhcp_lease *first, int lease_type, unsigned char *clid, int clid_len, int iaid);
1096 struct dhcp_lease *lease6_find_by_addr(struct in6_addr *net, int prefix, u64 addr);
1097 u64 lease_find_max_addr6(struct dhcp_context *context);
1098 void lease_ping_reply(struct in6_addr *sender, unsigned char *packet, char *interface);
1099 void lease_update_slaac(time_t now);
1100 #endif
1101 void lease_set_hwaddr(struct dhcp_lease *lease, unsigned char *hwaddr,
1102                       unsigned char *clid, int hw_len, int hw_type, int clid_len, time_t now, int force);
1103 void lease_set_hostname(struct dhcp_lease *lease, char *name, int auth, char *domain, char *config_domain);
1104 void lease_set_expires(struct dhcp_lease *lease, unsigned int len, time_t now);
1105 void lease_set_interface(struct dhcp_lease *lease, int interface, time_t now);
1106 struct dhcp_lease *lease_find_by_client(unsigned char *hwaddr, int hw_len, int hw_type,
1107                                         unsigned char *clid, int clid_len);
1108 struct dhcp_lease *lease_find_by_addr(struct in_addr addr);
1109 struct in_addr lease_find_max_addr(struct dhcp_context *context);
1110 void lease_prune(struct dhcp_lease *target, time_t now);
1111 void lease_update_from_configs(void);
1112 int do_script_run(time_t now);
1113 void rerun_scripts(void);
1114 void lease_find_interfaces(time_t now);
1115 #ifdef HAVE_SCRIPT
1116 void lease_add_extradata(struct dhcp_lease *lease, unsigned char *data,
1117                          unsigned int len, int delim);
1118 #endif
1119 #endif
1120
1121 /* rfc2131.c */
1122 #ifdef HAVE_DHCP
1123 size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
1124                   size_t sz, time_t now, int unicast_dest, int *is_inform, int pxe_fd, struct in_addr fallback);
1125 unsigned char *extended_hwaddr(int hwtype, int hwlen, unsigned char *hwaddr,
1126                                int clid_len, unsigned char *clid, int *len_out);
1127 #endif
1128
1129 /* dnsmasq.c */
1130 #ifdef HAVE_DHCP
1131 int make_icmp_sock(void);
1132 int icmp_ping(struct in_addr addr);
1133 #endif
1134 #ifdef HAVE_TOMATO
1135 void tomato_helper(time_t now);
1136 #endif
1137 #ifdef HAVE_LEASEFILE_EXPIRE //originally TOMATO option
1138 void flush_lease_file(time_t now);
1139 #endif
1140 void send_alarm(time_t event, time_t now);
1141 void send_event(int fd, int event, int data, char *msg);
1142 void clear_cache_and_reload(time_t now);
1143 void poll_resolv(int force, int do_reload, time_t now);
1144
1145 /* netlink.c */
1146 #ifdef HAVE_LINUX_NETWORK
1147 void netlink_init(void);
1148 void netlink_multicast(time_t now);
1149 #endif
1150
1151 /* bpf.c */
1152 #ifdef HAVE_BSD_NETWORK
1153 void init_bpf(void);
1154 void send_via_bpf(struct dhcp_packet *mess, size_t len,
1155                   struct in_addr iface_addr, struct ifreq *ifr);
1156 #endif
1157
1158 /* bpf.c or netlink.c */
1159 int iface_enumerate(int family, void *parm, int (callback)());
1160
1161 /* dbus.c */
1162 #ifdef HAVE_DBUS
1163 char *dbus_init(void);
1164 void check_dbus_listeners(fd_set *rset, fd_set *wset, fd_set *eset);
1165 void set_dbus_listeners(int *maxfdp, fd_set *rset, fd_set *wset, fd_set *eset);
1166 #  ifdef HAVE_DHCP
1167 void emit_dbus_signal(int action, struct dhcp_lease *lease, char *hostname);
1168 #  endif
1169 #endif
1170
1171 /* ipset.c */
1172 #ifdef HAVE_IPSET
1173 void ipset_init(void);
1174 int add_to_ipset(const char *setname, const struct all_addr *ipaddr, int flags, int remove);
1175 #endif
1176
1177 /* helper.c */
1178 #if defined(HAVE_SCRIPT)
1179 int create_helper(int event_fd, int err_fd, uid_t uid, gid_t gid, long max_fd);
1180 void helper_write(void);
1181 void queue_script(int action, struct dhcp_lease *lease,
1182                   char *hostname, time_t now);
1183 #ifdef HAVE_TFTP
1184 void queue_tftp(off_t file_len, char *filename, union mysockaddr *peer);
1185 #endif
1186 int helper_buf_empty(void);
1187 #endif
1188
1189 /* tftp.c */
1190 #ifdef HAVE_TFTP
1191 void tftp_request(struct listener *listen, time_t now);
1192 void check_tftp_listeners(fd_set *rset, time_t now);
1193 int do_tftp_script_run(void);
1194 #endif
1195
1196 /* conntrack.c */
1197 #ifdef HAVE_CONNTRACK
1198 int get_incoming_mark(union mysockaddr *peer_addr, struct all_addr *local_addr,
1199                       int istcp, unsigned int *markp);
1200 #endif
1201
1202 /* dhcp6.c */
1203 #ifdef HAVE_DHCP6
1204 void dhcp6_init(void);
1205 void dhcp6_packet(time_t now);
1206 struct dhcp_context *address6_allocate(struct dhcp_context *context,  unsigned char *clid, int clid_len,
1207                                        int iaid, int serial, struct dhcp_netid *netids, int plain_range, struct in6_addr *ans);
1208 int config_valid(struct dhcp_config *config, struct dhcp_context *context, struct in6_addr *addr);
1209 struct dhcp_context *address6_available(struct dhcp_context *context,
1210                                         struct in6_addr *taddr,
1211                                         struct dhcp_netid *netids,
1212                                         int plain_range);
1213 struct dhcp_context *address6_valid(struct dhcp_context *context,
1214                                     struct in6_addr *taddr,
1215                                     struct dhcp_netid *netids,
1216                                     int plain_range);
1217 struct dhcp_config *find_config6(struct dhcp_config *configs,
1218                                  struct dhcp_context *context,
1219                                  unsigned char *duid, int duid_len,
1220                                  char *hostname);
1221 struct dhcp_config *config_find_by_address6(struct dhcp_config *configs, struct in6_addr *net,
1222                                             int prefix, u64 addr);
1223 void make_duid(time_t now);
1224 void dhcp_construct_contexts(time_t now);
1225 #endif
1226
1227 /* rfc3315.c */
1228 #ifdef HAVE_DHCP6
1229 unsigned short dhcp6_reply(struct dhcp_context *context, int interface, char *iface_name,
1230                            struct in6_addr *fallback, size_t sz, int is_multicast, time_t now);
1231 #endif
1232
1233 /* dhcp-common.c */
1234 #ifdef HAVE_DHCP
1235 void dhcp_common_init(void);
1236 ssize_t recv_dhcp_packet(int fd, struct msghdr *msg);
1237 struct dhcp_netid *run_tag_if(struct dhcp_netid *input);
1238 struct dhcp_netid *option_filter(struct dhcp_netid *tags, struct dhcp_netid *context_tags,
1239                                  struct dhcp_opt *opts);
1240 int match_netid(struct dhcp_netid *check, struct dhcp_netid *pool, int negonly);
1241 char *strip_hostname(char *hostname);
1242 void log_tags(struct dhcp_netid *netid, u32 xid);
1243 int match_bytes(struct dhcp_opt *o, unsigned char *p, int len);
1244 void dhcp_update_configs(struct dhcp_config *configs);
1245 void display_opts(void);
1246 int lookup_dhcp_opt(int prot, char *name);
1247 int lookup_dhcp_len(int prot, int val);
1248 char *option_string(int prot, unsigned int opt, unsigned char *val,
1249                     int opt_len, char *buf, int buf_len);
1250 #ifdef HAVE_LINUX_NETWORK
1251 void bindtodevice(int fd);
1252 #endif
1253 #  ifdef HAVE_DHCP6
1254 void display_opts6(void);
1255 #  endif
1256 void log_context(int family, struct dhcp_context *context);
1257 #endif
1258
1259 /* outpacket.c */
1260 #ifdef HAVE_DHCP6
1261 void end_opt6(int container);
1262 int save_counter(int newval);
1263 void *expand(size_t headroom);
1264 int new_opt6(int opt);
1265 void *put_opt6(void *data, size_t len);
1266 void put_opt6_long(unsigned int val);
1267 void put_opt6_short(unsigned int val);
1268 void put_opt6_char(unsigned int val);
1269 void put_opt6_string(char *s);
1270 #endif
1271
1272 /* radv.c */
1273 #ifdef HAVE_DHCP6
1274 void ra_init(time_t now);
1275 void icmp6_packet(time_t now);
1276 time_t periodic_ra(time_t now);
1277 void ra_start_unsolicted(time_t now, struct dhcp_context *context);
1278 #endif
1279
1280 /* slaac.c */
1281 #ifdef HAVE_DHCP6
1282 void slaac_add_addrs(struct dhcp_lease *lease, time_t now, int force);
1283 time_t periodic_slaac(time_t now, struct dhcp_lease *leases);
1284 void slaac_ping_reply(struct in6_addr *sender, unsigned char *packet, char *interface, struct dhcp_lease *leases);
1285 #endif