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 #define OPT_FAST_RA        41
 225
 226 #ifdef HAVE_QUIET_DHCP  //Originally a TOMATO option
 227 #define OPT_QUIET_DHCP     42
 228 #define OPT_QUIET_DHCP6    43
 229 #define OPT_QUIET_RA       44
 230 #define OPT_LAST           45
 231 #else
 232 #define OPT_LAST                   42
 233 #endif //HAVE_QUIET_DHCP
 234
 235
 236 /* extra flags for my_syslog, we use a couple of facilities since they are known
 237    not to occupy the same bits as priorities, no matter how syslog.h is set up. */
 238 #define MS_TFTP LOG_USER
 239 #define MS_DHCP LOG_DAEMON
 240
 241 struct all_addr {
 242   union {
 243     struct in_addr addr4;
 244 #ifdef HAVE_IPV6
 245     struct in6_addr addr6;
 246 #endif
 247   } addr;
 248 };
 249
 250 struct bogus_addr {
 251   struct in_addr addr;
 252   struct bogus_addr *next;
 253 };
 254
 255 /* dns doctor param */
 256 struct doctor {
 257   struct in_addr in, end, out, mask;
 258   struct doctor *next;
 259 };
 260
 261 struct mx_srv_record {
 262   char *name, *target;
 263   int issrv, srvport, priority, weight;
 264   unsigned int offset;
 265   struct mx_srv_record *next;
 266 };
 267
 268 struct naptr {
 269   char *name, *replace, *regexp, *services, *flags;
 270   unsigned int order, pref;
 271   struct naptr *next;
 272 };
 273
 274 struct txt_record {
 275   char *name;
 276   unsigned char *txt;
 277   unsigned short class, len;
 278   struct txt_record *next;
 279 };
 280
 281 struct ptr_record {
 282   char *name, *ptr;
 283   struct ptr_record *next;
 284 };
 285
 286 struct cname {
 287   char *alias, *target;
 288   struct cname *next;
 289 };
 290
 291 struct auth_zone {
 292   char *domain;
 293   struct subnet {
 294     int is6, prefixlen;
 295     struct in_addr addr4;
 296 #ifdef HAVE_IPV6
 297     struct in6_addr addr6;
 298 #endif
 299     struct subnet *next;
 300   } *subnet;
 301   struct auth_zone *next;
 302 };
 303
 304
 305 struct host_record {
 306   struct name_list {
 307     char *name;
 308     struct name_list *next;
 309   } *names;
 310   struct in_addr addr;
 311 #ifdef HAVE_IPV6
 312   struct in6_addr addr6;
 313 #endif
 314   struct host_record *next;
 315 };
 316
 317 struct interface_name {
 318   char *name; /* domain name */
 319   char *intr; /* interface name */
 320   struct addrlist {
 321     struct all_addr addr;
 322     struct addrlist *next;
 323   } *addr4;
 324 #ifdef HAVE_IPV6
 325   struct addrlist *addr6;
 326 #endif
 327   struct interface_name *next;
 328 };
 329
 330 union bigname {
 331   char name[MAXDNAME];
 332   union bigname *next; /* freelist */
 333 };
 334
 335 struct keydata {
 336   struct keydata *next;
 337   unsigned char key[KEYBLOCK_LEN];
 338 };
 339
 340 struct crec {
 341   struct crec *next, *prev, *hash_next;
 342   /* union is 16 bytes when doing IPv6, 8 bytes on 32 bit machines without IPv6 */
 343   union {
 344     struct all_addr addr;
 345     struct {
 346       struct crec *cache;
 347       int uid;
 348     } cname;
 349     struct {
 350       struct keydata *keydata;
 351       unsigned char algo;
 352       unsigned char digest; /* DS only */
 353       unsigned short flags_or_keyid; /* flags for DNSKEY, keyid for DS */
 354     } key;
 355   } addr;
 356   time_t ttd; /* time to die */
 357   /* used as keylen if F_DS or F_DNSKEY, index to source for F_HOSTS */
 358   int uid;
 359   unsigned short flags;
 360   union {
 361     char sname[SMALLDNAME];
 362     union bigname *bname;
 363     char *namep;
 364   } name;
 365 };
 366
 367 #define F_IMMORTAL  (1u<<0)
 368 #define F_NAMEP     (1u<<1)
 369 #define F_REVERSE   (1u<<2)
 370 #define F_FORWARD   (1u<<3)
 371 #define F_DHCP      (1u<<4)
 372 #define F_NEG       (1u<<5)
 373 #define F_HOSTS     (1u<<6)
 374 #define F_IPV4      (1u<<7)
 375 #define F_IPV6      (1u<<8)
 376 #define F_BIGNAME   (1u<<9)
 377 #define F_NXDOMAIN  (1u<<10)
 378 #define F_CNAME     (1u<<11)
 379 #define F_DNSKEY    (1u<<12)
 380 #define F_CONFIG    (1u<<13)
 381 #define F_DS        (1u<<14)
 382 #define F_DNSSECOK  (1u<<15)
 383
 384 /* below here are only valid as args to log_query: cache
 385    entries are limited to 16 bits */
 386 #define F_UPSTREAM  (1u<<16)
 387 #define F_RRNAME    (1u<<17)
 388 #define F_SERVER    (1u<<18)
 389 #define F_QUERY     (1u<<19)
 390 #define F_NOERR     (1u<<20)
 391 #define F_AUTH      (1u<<21)
 392
 393 /* composites */
 394 #define F_TYPE      (F_IPV4 | F_IPV6 | F_DNSKEY | F_DS) /* Only one may be set */
 395
 396
 397
 398 /* struct sockaddr is not large enough to hold any address,
 399    and specifically not big enough to hold an IPv6 address.
 400    Blech. Roll our own. */
 401 union mysockaddr {
 402   struct sockaddr sa;
 403   struct sockaddr_in in;
 404 #if defined(HAVE_IPV6)
 405   struct sockaddr_in6 in6;
 406 #endif
 407 };
 408
 409 /* bits in flag param to IPv6 callbacks from iface_enumerate() */
 410 #define IFACE_TENTATIVE   1
 411 #define IFACE_DEPRECATED  2
 412 #define IFACE_PERMANENT   4
 413
 414
 415 #define SERV_FROM_RESOLV       1  /* 1 for servers from resolv, 0 for command line. */
 416 #define SERV_NO_ADDR           2  /* no server, this domain is local only */
 417 #define SERV_LITERAL_ADDRESS   4  /* addr is the answer, not the server */
 418 #define SERV_HAS_DOMAIN        8  /* server for one domain only */
 419 #define SERV_HAS_SOURCE       16  /* source address defined */
 420 #define SERV_FOR_NODOTS       32  /* server for names with no domain part only */
 421 #define SERV_WARNED_RECURSIVE 64  /* avoid warning spam */
 422 #define SERV_FROM_DBUS       128  /* 1 if source is DBus */
 423 #define SERV_MARK            256  /* for mark-and-delete */
 424 #define SERV_TYPE    (SERV_HAS_DOMAIN | SERV_FOR_NODOTS)
 425 #define SERV_COUNTED         512  /* workspace for log code */
 426 #define SERV_USE_RESOLV     1024  /* forward this domain in the normal way */
 427 #define SERV_NO_REBIND      2048  /* inhibit dns-rebind protection */
 428
 429 struct serverfd {
 430   int fd;
 431   union mysockaddr source_addr;
 432   char interface[IF_NAMESIZE+1];
 433   struct serverfd *next;
 434 };
 435
 436 struct randfd {
 437   int fd;
 438   unsigned short refcount, family;
 439 };
 440
 441 struct server {
 442   union mysockaddr addr, source_addr;
 443   char interface[IF_NAMESIZE+1];
 444   struct serverfd *sfd;
 445   char *domain; /* set if this server only handles a domain. */
 446   int flags, tcpfd;
 447   unsigned int queries, failed_queries;
 448   struct server *next;
 449 };
 450
 451 struct ipsets {
 452   char **sets;
 453   char *domain;
 454   struct ipsets *next;
 455 };
 456
 457 struct irec {
 458   union mysockaddr addr;
 459   struct in_addr netmask; /* only valid for IPv4 */
 460   int tftp_ok, dhcp_ok, mtu, done, dad, dns_auth, index, multicast_done;
 461   char *name;
 462   struct irec *next;
 463 };
 464
 465 struct listener {
 466   int fd, tcpfd, tftpfd, family;
 467   struct irec *iface; /* only sometimes valid for non-wildcard */
 468   struct listener *next;
 469 };
 470
 471 /* interface and address parms from command line. */
 472 struct iname {
 473   char *name;
 474   union mysockaddr addr;
 475   int used;
 476   struct iname *next;
 477 };
 478
 479 /* resolv-file parms from command-line */
 480 struct resolvc {
 481   struct resolvc *next;
 482   int is_default, logged;
 483   time_t mtime;
 484   char *name;
 485 };
 486
 487 /* adn-hosts parms from command-line (also dhcp-hostsfile and dhcp-optsfile */
 488 #define AH_DIR      1
 489 #define AH_INACTIVE 2
 490 struct hostsfile {
 491   struct hostsfile *next;
 492   int flags;
 493   char *fname;
 494   int index; /* matches to cache entries for logging */
 495 };
 496
 497 #define FREC_NOREBIND           1
 498 #define FREC_CHECKING_DISABLED  2
 499
 500 struct frec {
 501   union mysockaddr source;
 502   struct all_addr dest;
 503   struct server *sentto; /* NULL means free */
 504   struct randfd *rfd4;
 505 #ifdef HAVE_IPV6
 506   struct randfd *rfd6;
 507 #endif
 508   unsigned int iface;
 509   unsigned short orig_id, new_id;
 510   int fd, forwardall, flags;
 511   unsigned int crc;
 512   time_t time;
 513   struct frec *next;
 514 };
 515
 516 /* flags in top of length field for DHCP-option tables */
 517 #define OT_ADDR_LIST    0x8000
 518 #define OT_RFC1035_NAME 0x4000
 519 #define OT_INTERNAL     0x2000
 520 #define OT_NAME         0x1000
 521 #define OT_CSTRING      0x0800
 522 #define OT_DEC          0x0400
 523 #define OT_TIME         0x0200
 524
 525 /* actions in the daemon->helper RPC */
 526 #define ACTION_DEL           1
 527 #define ACTION_OLD_HOSTNAME  2
 528 #define ACTION_OLD           3
 529 #define ACTION_ADD           4
 530 #define ACTION_TFTP          5
 531
 532 #define LEASE_NEW            1  /* newly created */
 533 #define LEASE_CHANGED        2  /* modified */
 534 #define LEASE_AUX_CHANGED    4  /* CLID or expiry changed */
 535 #define LEASE_AUTH_NAME      8  /* hostname came from config, not from client */
 536 #define LEASE_USED          16  /* used this DHCPv6 transaction */
 537 #define LEASE_NA            32  /* IPv6 no-temporary lease */
 538 #define LEASE_TA            64  /* IPv6 temporary lease */
 539 #define LEASE_HAVE_HWADDR  128  /* Have set hwaddress */
 540
 541 struct dhcp_lease {
 542   int clid_len;          /* length of client identifier */
 543   unsigned char *clid;   /* clientid */
 544   char *hostname, *fqdn; /* name from client-hostname option or config */
 545   char *old_hostname;    /* hostname before it moved to another lease */
 546   int flags;
 547   time_t expires;        /* lease expiry */
 548 #ifdef HAVE_BROKEN_RTC
 549   unsigned int length;
 550 #endif
 551   int hwaddr_len, hwaddr_type; /* hw_type used for iaid in v6 */
 552   unsigned char hwaddr[DHCP_CHADDR_MAX]; /* also IPv6 address */
 553   struct in_addr addr, override, giaddr;
 554   unsigned char *extradata;
 555   unsigned int extradata_len, extradata_size;
 556   int last_interface;
 557 #ifdef HAVE_DHCP6
 558   struct slaac_address {
 559     struct in6_addr addr, local;
 560     time_t ping_time;
 561     int backoff; /* zero -> confirmed */
 562     struct slaac_address *next;
 563   } *slaac_address;
 564   int vendorclass_count;
 565 #endif
 566   struct dhcp_lease *next;
 567 };
 568
 569 struct dhcp_netid {
 570   char *net;
 571   struct dhcp_netid *next;
 572 };
 573
 574 struct dhcp_netid_list {
 575   struct dhcp_netid *list;
 576   struct dhcp_netid_list *next;
 577 };
 578
 579 struct tag_if {
 580   struct dhcp_netid_list *set;
 581   struct dhcp_netid *tag;
 582   struct tag_if *next;
 583 };
 584
 585 struct hwaddr_config {
 586   int hwaddr_len, hwaddr_type;
 587   unsigned char hwaddr[DHCP_CHADDR_MAX];
 588   unsigned int wildcard_mask;
 589   struct hwaddr_config *next;
 590 };
 591
 592 struct dhcp_config {
 593   unsigned int flags;
 594   int clid_len;          /* length of client identifier */
 595   unsigned char *clid;   /* clientid */
 596   char *hostname, *domain;
 597   struct dhcp_netid_list *netid;
 598 #ifdef HAVE_DHCP6
 599   struct in6_addr addr6;
 600 #endif
 601   struct in_addr addr;
 602   time_t decline_time;
 603   unsigned int lease_time;
 604   struct hwaddr_config *hwaddr;
 605   struct dhcp_config *next;
 606 };
 607
 608 #define have_config(config, mask) ((config) && ((config)->flags & (mask)))
 609
 610 #define CONFIG_DISABLE           1
 611 #define CONFIG_CLID              2
 612 #define CONFIG_TIME              8
 613 #define CONFIG_NAME             16
 614 #define CONFIG_ADDR             32
 615 #define CONFIG_NOCLID          128
 616 #define CONFIG_FROM_ETHERS     256    /* entry created by /etc/ethers */
 617 #define CONFIG_ADDR_HOSTS      512    /* address added by from /etc/hosts */
 618 #define CONFIG_DECLINED       1024    /* address declined by client */
 619 #define CONFIG_BANK           2048    /* from dhcp hosts file */
 620 #define CONFIG_ADDR6          4096
 621 #define CONFIG_WILDCARD       8192
 622
 623 struct dhcp_opt {
 624   int opt, len, flags;
 625   union {
 626     int encap;
 627     unsigned int wildcard_mask;
 628     unsigned char *vendor_class;
 629   } u;
 630   unsigned char *val;
 631   struct dhcp_netid *netid;
 632   struct dhcp_opt *next;
 633 };
 634
 635 #define DHOPT_ADDR               1
 636 #define DHOPT_STRING             2
 637 #define DHOPT_ENCAPSULATE        4
 638 #define DHOPT_ENCAP_MATCH        8
 639 #define DHOPT_FORCE             16
 640 #define DHOPT_BANK              32
 641 #define DHOPT_ENCAP_DONE        64
 642 #define DHOPT_MATCH            128
 643 #define DHOPT_VENDOR           256
 644 #define DHOPT_HEX              512
 645 #define DHOPT_VENDOR_MATCH    1024
 646 #define DHOPT_RFC3925         2048
 647 #define DHOPT_TAGOK           4096
 648 #define DHOPT_ADDR6           8192
 649
 650 struct dhcp_boot {
 651   char *file, *sname, *tftp_sname;
 652   struct in_addr next_server;
 653   struct dhcp_netid *netid;
 654   struct dhcp_boot *next;
 655 };
 656
 657 struct pxe_service {
 658   unsigned short CSA, type;
 659   char *menu, *basename, *sname;
 660   struct in_addr server;
 661   struct dhcp_netid *netid;
 662   struct pxe_service *next;
 663 };
 664
 665 #define MATCH_VENDOR     1
 666 #define MATCH_USER       2
 667 #define MATCH_CIRCUIT    3
 668 #define MATCH_REMOTE     4
 669 #define MATCH_SUBSCRIBER 5
 670
 671 /* vendorclass, userclass, remote-id or cicuit-id */
 672 struct dhcp_vendor {
 673   int len, match_type;
 674   unsigned int enterprise;
 675   char *data;
 676   struct dhcp_netid netid;
 677   struct dhcp_vendor *next;
 678 };
 679
 680 struct dhcp_mac {
 681   unsigned int mask;
 682   int hwaddr_len, hwaddr_type;
 683   unsigned char hwaddr[DHCP_CHADDR_MAX];
 684   struct dhcp_netid netid;
 685   struct dhcp_mac *next;
 686 };
 687
 688 struct dhcp_bridge {
 689   char iface[IF_NAMESIZE];
 690   struct dhcp_bridge *alias, *next;
 691 };
 692
 693 struct cond_domain {
 694   char *domain, *prefix;
 695   struct in_addr start, end;
 696 #ifdef HAVE_IPV6
 697   struct in6_addr start6, end6;
 698 #endif
 699   int is6;
 700   struct cond_domain *next;
 701 };
 702
 703 #ifdef OPTION6_PREFIX_CLASS
 704 struct prefix_class {
 705   int class;
 706   struct dhcp_netid tag;
 707   struct prefix_class *next;
 708 };
 709 #endif
 710
 711 struct dhcp_context {
 712   unsigned int lease_time, addr_epoch;
 713   struct in_addr netmask, broadcast;
 714   struct in_addr local, router;
 715   struct in_addr start, end; /* range of available addresses */
 716 #ifdef HAVE_DHCP6
 717   struct in6_addr start6, end6; /* range of available addresses */
 718   struct in6_addr local6;
 719   int prefix, if_index;
 720   unsigned int valid, preferred, saved_valid;
 721   time_t ra_time, ra_short_period_start, address_lost_time;
 722   char *template_interface;
 723 #endif
 724   int flags;
 725   struct dhcp_netid netid, *filter;
 726   struct dhcp_context *next, *current;
 727 };
 728
 729 #define CONTEXT_STATIC         1
 730 #define CONTEXT_NETMASK        2
 731 #define CONTEXT_BRDCAST        4
 732 #define CONTEXT_PROXY          8
 733 #define CONTEXT_RA_ONLY       16
 734 #define CONTEXT_RA_DONE       32
 735 #define CONTEXT_RA_NAME       64
 736 #define CONTEXT_RA_STATELESS 128
 737 #define CONTEXT_DHCP         256
 738 #define CONTEXT_DEPRECATE    512
 739 #define CONTEXT_TEMPLATE    1024    /* create contexts using addresses */
 740 #define CONTEXT_CONSTRUCTED 2048
 741 #define CONTEXT_GC          4096
 742 #define CONTEXT_RA          8192
 743 #define CONTEXT_CONF_USED  16384
 744 #define CONTEXT_USED       32768
 745 #define CONTEXT_NOAUTH     65536
 746 #define CONTEXT_OLD       131072
 747
 748
 749 struct ping_result {
 750   struct in_addr addr;
 751   time_t time;
 752   unsigned int hash;
 753   struct ping_result *next;
 754 };
 755
 756 struct tftp_file {
 757   int refcount, fd;
 758   off_t size;
 759   dev_t dev;
 760   ino_t inode;
 761   char filename[];
 762 };
 763
 764 struct tftp_transfer {
 765   int sockfd;
 766   time_t timeout;
 767   int backoff;
 768   unsigned int block, blocksize, expansion;
 769   off_t offset;
 770   union mysockaddr peer;
 771   char opt_blocksize, opt_transize, netascii, carrylf;
 772   struct tftp_file *file;
 773   struct tftp_transfer *next;
 774 };
 775
 776 struct addr_list {
 777   struct in_addr addr;
 778   struct addr_list *next;
 779 };
 780
 781 struct tftp_prefix {
 782   char *interface;
 783   char *prefix;
 784   struct tftp_prefix *next;
 785 };
 786
 787 struct dhcp_relay {
 788   struct all_addr local, server;
 789   char *interface; /* Allowable interface for replies from server, and dest for IPv6 multicast */
 790   int iface_index; /* working - interface in which requests arrived, for return */
 791   struct dhcp_relay *current, *next;
 792 };
 793
 794 extern struct daemon {
 795   /* datastuctures representing the command-line and
 796      config file arguments. All set (including defaults)
 797      in option.c */
 798
 799   unsigned int options, options2;
 800   struct resolvc default_resolv, *resolv_files;
 801   time_t last_resolv;
 802   struct mx_srv_record *mxnames;
 803   struct naptr *naptr;
 804   struct txt_record *txt, *rr;
 805   struct ptr_record *ptr;
 806   struct host_record *host_records, *host_records_tail;
 807   struct cname *cnames;
 808   struct auth_zone *auth_zones;
 809   struct interface_name *int_names;
 810   char *mxtarget;
 811   char *lease_file;
 812   char *username, *groupname, *scriptuser;
 813   char *luascript;
 814   char *authserver, *hostmaster;
 815   struct iname *authinterface;
 816   struct name_list *secondary_forward_server;
 817   int group_set, osport;
 818   char *domain_suffix;
 819   struct cond_domain *cond_domain, *synth_domains;
 820   char *runfile;
 821   char *lease_change_command;
 822   struct iname *if_names, *if_addrs, *if_except, *dhcp_except, *auth_peers, *tftp_interfaces;
 823   struct bogus_addr *bogus_addr;
 824   struct server *servers;
 825   struct ipsets *ipsets;
 826   int log_fac; /* log facility */
 827   char *log_file; /* optional log file */
 828   int max_logs;  /* queue limit */
 829   int cachesize, ftabsize;
 830   int port, query_port, min_port;
 831   unsigned long local_ttl, neg_ttl, max_ttl, max_cache_ttl, auth_ttl;
 832   struct hostsfile *addn_hosts;
 833   struct dhcp_context *dhcp, *dhcp6;
 834   struct dhcp_config *dhcp_conf;
 835   struct dhcp_opt *dhcp_opts, *dhcp_match, *dhcp_opts6, *dhcp_match6;
 836   struct dhcp_vendor *dhcp_vendors;
 837   struct dhcp_mac *dhcp_macs;
 838   struct dhcp_boot *boot_config;
 839   struct pxe_service *pxe_services;
 840   struct tag_if *tag_if;
 841   struct addr_list *override_relays;
 842   struct dhcp_relay *relay4, *relay6;
 843   int override;
 844   int enable_pxe;
 845   int doing_ra, doing_dhcp6;
 846   struct dhcp_netid_list *dhcp_ignore, *dhcp_ignore_names, *dhcp_gen_names;
 847   struct dhcp_netid_list *force_broadcast, *bootp_dynamic;
 848   struct hostsfile *dhcp_hosts_file, *dhcp_opts_file;
 849   int dhcp_max, tftp_max;
 850   int dhcp_server_port, dhcp_client_port;
 851   int start_tftp_port, end_tftp_port;
 852   unsigned int min_leasetime;
 853   struct doctor *doctors;
 854   unsigned short edns_pktsz;
 855   char *tftp_prefix;
 856   struct tftp_prefix *if_prefix; /* per-interface TFTP prefixes */
 857   unsigned int duid_enterprise, duid_config_len;
 858   unsigned char *duid_config;
 859   char *dbus_name;
 860   unsigned long soa_sn, soa_refresh, soa_retry, soa_expiry;
 861 #ifdef OPTION6_PREFIX_CLASS
 862   struct prefix_class *prefix_classes;
 863 #endif
 864
 865   /* globally used stuff for DNS */
 866   char *packet; /* packet buffer */
 867   int packet_buff_sz; /* size of above */
 868   char *namebuff; /* MAXDNAME size buffer */
 869   unsigned int local_answer, queries_forwarded;
 870   struct frec *frec_list;
 871   struct serverfd *sfds;
 872   struct irec *interfaces;
 873   struct listener *listeners;
 874   struct server *last_server;
 875   time_t forwardtime;
 876   int forwardcount;
 877   struct server *srv_save; /* Used for resend on DoD */
 878   size_t packet_len;       /*      "        "        */
 879   struct randfd *rfd_save; /*      "        "        */
 880   pid_t tcp_pids[MAX_PROCS];
 881   struct randfd randomsocks[RANDOM_SOCKS];
 882   int v6pktinfo;
 883
 884   /* DHCP state */
 885   int dhcpfd, helperfd, pxefd;
 886 #if defined(HAVE_LINUX_NETWORK)
 887   int netlinkfd;
 888 #elif defined(HAVE_BSD_NETWORK)
 889   int dhcp_raw_fd, dhcp_icmp_fd;
 890 #endif
 891   struct iovec dhcp_packet;
 892   char *dhcp_buff, *dhcp_buff2, *dhcp_buff3;
 893   struct ping_result *ping_results;
 894   FILE *lease_stream;
 895   struct dhcp_bridge *bridges;
 896 #ifdef HAVE_DHCP6
 897   int duid_len;
 898   unsigned char *duid;
 899   struct iovec outpacket;
 900   int dhcp6fd, icmp6fd;
 901 #endif
 902   /* DBus stuff */
 903   /* void * here to avoid depending on dbus headers outside dbus.c */
 904   void *dbus;
 905 #ifdef HAVE_DBUS
 906   struct watch *watches;
 907 #endif
 908
 909   /* TFTP stuff */
 910   struct tftp_transfer *tftp_trans, *tftp_done_trans;
 911
 912   /* utility string buffer, hold max sized IP address as string */
 913   char *addrbuff;
 914
 915 } *daemon;
 916
 917 /* cache.c */
 918 void cache_init(void);
 919 void log_query(unsigned int flags, char *name, struct all_addr *addr, char *arg);
 920 char *record_source(int index);
 921 void querystr(char *desc, char *str, unsigned short type);
 922 struct crec *cache_find_by_addr(struct crec *crecp,
 923                                 struct all_addr *addr, time_t now,
 924                                 unsigned short prot);
 925 struct crec *cache_find_by_name(struct crec *crecp,
 926                                 char *name, time_t now, unsigned short  prot);
 927 void cache_end_insert(void);
 928 void cache_start_insert(void);
 929 struct crec *cache_insert(char *name, struct all_addr *addr,
 930                           time_t now, unsigned long ttl, unsigned short flags);
 931 void cache_reload(void);
 932 void cache_add_dhcp_entry(char *host_name, int prot, struct all_addr *host_address, time_t ttd);
 933 struct in_addr a_record_from_hosts(char *name, time_t now);
 934 void cache_unhash_dhcp(void);
 935 void dump_cache(time_t now);
 936 char *cache_get_name(struct crec *crecp);
 937 struct crec *cache_enumerate(int init);
 938 #ifdef HAVE_DNSSEC
 939 struct keydata *keydata_alloc(char *data, size_t len);
 940 void keydata_free(struct keydata *blocks);
 941 #endif
 942
 943 /* domain.c */
 944 char *get_domain(struct in_addr addr);
 945 #ifdef HAVE_IPV6
 946 char *get_domain6(struct in6_addr *addr);
 947 #endif
 948 int is_name_synthetic(int flags, char *name, struct all_addr *addr);
 949 int is_rev_synth(int flag, struct all_addr *addr, char *name);
 950
 951 /* rfc1035.c */
 952 unsigned int extract_request(struct dns_header *header, size_t qlen,
 953                                char *name, unsigned short *typep);
 954 size_t setup_reply(struct dns_header *header, size_t  qlen,
 955                    struct all_addr *addrp, unsigned int flags,
 956                    unsigned long local_ttl);
 957 int extract_addresses(struct dns_header *header, size_t qlen, char *namebuff,
 958                       time_t now, char **ipsets, int is_sign, int checkrebind,
 959                       int checking_disabled);
 960 size_t answer_request(struct dns_header *header, char *limit, size_t qlen,
 961                    struct in_addr local_addr, struct in_addr local_netmask, time_t now);
 962 int check_for_bogus_wildcard(struct dns_header *header, size_t qlen, char *name,
 963                              struct bogus_addr *addr, time_t now);
 964 unsigned char *find_pseudoheader(struct dns_header *header, size_t plen,
 965                                  size_t *len, unsigned char **p, int *is_sign);
 966 int check_for_local_domain(char *name, time_t now);
 967 unsigned int questions_crc(struct dns_header *header, size_t plen, char *buff);
 968 size_t resize_packet(struct dns_header *header, size_t plen,
 969                   unsigned char *pheader, size_t hlen);
 970 size_t add_mac(struct dns_header *header, size_t plen, char *limit, union mysockaddr *l3);
 971 int add_resource_record(struct dns_header *header, char *limit, int *truncp,
 972                         int nameoffset, unsigned char **pp, unsigned long ttl,
 973                         int *offset, unsigned short type, unsigned short class, char *format, ...);
 974 unsigned char *skip_questions(struct dns_header *header, size_t plen);
 975 int extract_name(struct dns_header *header, size_t plen, unsigned char **pp,
 976                  char *name, int isExtract, int extrabytes);
 977 int in_arpa_name_2_addr(char *namein, struct all_addr *addrp);
 978
 979 /* auth.c */
 980 #ifdef HAVE_AUTH
 981 size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t now, union mysockaddr *peer_addr);
 982 #endif
 983
 984 /* util.c */
 985 void rand_init(void);
 986 unsigned short rand16(void);
 987 int legal_hostname(char *c);
 988 char *canonicalise(char *s, int *nomem);
 989 unsigned char *do_rfc1035_name(unsigned char *p, char *sval);
 990 void *safe_malloc(size_t size);
 991 void safe_pipe(int *fd, int read_noblock);
 992 void *whine_malloc(size_t size);
 993 int sa_len(union mysockaddr *addr);
 994 int sockaddr_isequal(union mysockaddr *s1, union mysockaddr *s2);
 995 int hostname_isequal(const char *a, const char *b);
 996 time_t dnsmasq_time(void);
 997 int is_same_net(struct in_addr a, struct in_addr b, struct in_addr mask);
 998 #ifdef HAVE_IPV6
 999 int is_same_net6(struct in6_addr *a, struct in6_addr *b, int prefixlen);
1000 u64 addr6part(struct in6_addr *addr);
1001 void setaddr6part(struct in6_addr *addr, u64 host);
1002 #endif
1003 int retry_send(void);
1004 void prettyprint_time(char *buf, unsigned int t);
1005 int prettyprint_addr(union mysockaddr *addr, char *buf);
1006 int parse_hex(char *in, unsigned char *out, int maxlen,
1007               unsigned int *wildcard_mask, int *mac_type);
1008 int memcmp_masked(unsigned char *a, unsigned char *b, int len,
1009                   unsigned int mask);
1010 int expand_buf(struct iovec *iov, size_t size);
1011 char *print_mac(char *buff, unsigned char *mac, int len);
1012 void bump_maxfd(int fd, int *max);
1013 int read_write(int fd, unsigned char *packet, int size, int rw);
1014
1015 int wildcard_match(const char* wildcard, const char* match);
1016
1017 /* log.c */
1018 void die(char *message, char *arg1, int exit_code);
1019 int log_start(struct passwd *ent_pw, int errfd);
1020 int log_reopen(char *log_file);
1021 void my_syslog(int priority, const char *format, ...);
1022 void set_log_writer(fd_set *set, int *maxfdp);
1023 void check_log_writer(fd_set *set);
1024 void flush_log(void);
1025
1026 /* option.c */
1027 void read_opts (int argc, char **argv, char *compile_opts);
1028 char *option_string(int prot, unsigned int opt, unsigned char *val,
1029                     int opt_len, char *buf, int buf_len);
1030 void reread_dhcp(void);
1031 void set_option_bool(unsigned int opt);
1032 void reset_option_bool(unsigned int opt);
1033 struct hostsfile *expand_filelist(struct hostsfile *list);
1034 char *parse_server(char *arg, union mysockaddr *addr,
1035                    union mysockaddr *source_addr, char *interface, int *flags);
1036
1037 /* forward.c */
1038 void reply_query(int fd, int family, time_t now);
1039 void receive_query(struct listener *listen, time_t now);
1040 unsigned char *tcp_request(int confd, time_t now,
1041                            union mysockaddr *local_addr, struct in_addr netmask, int auth_dns);
1042 void server_gone(struct server *server);
1043 struct frec *get_new_frec(time_t now, int *wait);
1044 int send_from(int fd, int nowild, char *packet, size_t len,
1045                union mysockaddr *to, struct all_addr *source,
1046                unsigned int iface);
1047
1048 /* network.c */
1049 int indextoname(int fd, int index, char *name);
1050 int local_bind(int fd, union mysockaddr *addr, char *intname, int is_tcp);
1051 int random_sock(int family);
1052 void pre_allocate_sfds(void);
1053 int reload_servers(char *fname);
1054 void check_servers(void);
1055 int enumerate_interfaces(int reset);
1056 void create_wildcard_listeners(void);
1057 void create_bound_listeners(int die);
1058 int is_dad_listeners(void);
1059 int iface_check(int family, struct all_addr *addr, char *name, int *auth_dns);
1060 int loopback_exception(int fd, int family, struct all_addr *addr, char *name);
1061 int label_exception(int index, int family, struct all_addr *addr);
1062 int fix_fd(int fd);
1063 int tcp_interface(int fd, int af);
1064 #ifdef HAVE_IPV6
1065 int set_ipv6pktinfo(int fd);
1066 #endif
1067 #ifdef HAVE_DHCP6
1068 void join_multicast(int dienow);
1069 #endif
1070
1071 /* dhcp.c */
1072 #ifdef HAVE_DHCP
1073 void dhcp_init(void);
1074 void dhcp_packet(time_t now, int pxe_fd);
1075 struct dhcp_context *address_available(struct dhcp_context *context,
1076                                        struct in_addr addr,
1077                                        struct dhcp_netid *netids);
1078 struct dhcp_context *narrow_context(struct dhcp_context *context,
1079                                     struct in_addr taddr,
1080                                     struct dhcp_netid *netids);
1081 int address_allocate(struct dhcp_context *context,
1082                      struct in_addr *addrp, unsigned char *hwaddr, int hw_len,
1083                      struct dhcp_netid *netids, time_t now);
1084 int config_has_mac(struct dhcp_config *config, unsigned char *hwaddr, int len, int type);
1085 struct dhcp_config *find_config(struct dhcp_config *configs,
1086                                 struct dhcp_context *context,
1087                                 unsigned char *clid, int clid_len,
1088                                 unsigned char *hwaddr, int hw_len,
1089                                 int hw_type, char *hostname);
1090 void dhcp_read_ethers(void);
1091 struct dhcp_config *config_find_by_address(struct dhcp_config *configs, struct in_addr addr);
1092 char *host_from_dns(struct in_addr addr);
1093 #endif
1094
1095 /* lease.c */
1096 #ifdef HAVE_DHCP
1097 void lease_update_file(time_t now);
1098 void lease_update_dns(int force);
1099 void lease_init(time_t now);
1100 struct dhcp_lease *lease4_allocate(struct in_addr addr);
1101 #ifdef HAVE_DHCP6
1102 struct dhcp_lease *lease6_allocate(struct in6_addr *addrp, int lease_type);
1103 struct dhcp_lease *lease6_find(unsigned char *clid, int clid_len,
1104                                int lease_type, int iaid, struct in6_addr *addr);
1105 void lease6_reset(void);
1106 struct dhcp_lease *lease6_find_by_client(struct dhcp_lease *first, int lease_type, unsigned char *clid, int clid_len, int iaid);
1107 struct dhcp_lease *lease6_find_by_addr(struct in6_addr *net, int prefix, u64 addr);
1108 u64 lease_find_max_addr6(struct dhcp_context *context);
1109 void lease_ping_reply(struct in6_addr *sender, unsigned char *packet, char *interface);
1110 void lease_update_slaac(time_t now);
1111 #endif
1112 void lease_set_hwaddr(struct dhcp_lease *lease, unsigned char *hwaddr,
1113                       unsigned char *clid, int hw_len, int hw_type, int clid_len, time_t now, int force);
1114 void lease_set_hostname(struct dhcp_lease *lease, char *name, int auth, char *domain, char *config_domain);
1115 void lease_set_expires(struct dhcp_lease *lease, unsigned int len, time_t now);
1116 void lease_set_interface(struct dhcp_lease *lease, int interface, time_t now);
1117 struct dhcp_lease *lease_find_by_client(unsigned char *hwaddr, int hw_len, int hw_type,
1118                                         unsigned char *clid, int clid_len);
1119 struct dhcp_lease *lease_find_by_addr(struct in_addr addr);
1120 struct in_addr lease_find_max_addr(struct dhcp_context *context);
1121 void lease_prune(struct dhcp_lease *target, time_t now);
1122 void lease_update_from_configs(void);
1123 int do_script_run(time_t now);
1124 void rerun_scripts(void);
1125 void lease_find_interfaces(time_t now);
1126 #ifdef HAVE_SCRIPT
1127 void lease_add_extradata(struct dhcp_lease *lease, unsigned char *data,
1128                          unsigned int len, int delim);
1129 #endif
1130 #endif
1131
1132 /* rfc2131.c */
1133 #ifdef HAVE_DHCP
1134 size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
1135                   size_t sz, time_t now, int unicast_dest, int *is_inform, int pxe_fd, struct in_addr fallback);
1136 unsigned char *extended_hwaddr(int hwtype, int hwlen, unsigned char *hwaddr,
1137                                int clid_len, unsigned char *clid, int *len_out);
1138 #endif
1139
1140 /* dnsmasq.c */
1141 #ifdef HAVE_DHCP
1142 int make_icmp_sock(void);
1143 int icmp_ping(struct in_addr addr);
1144 #endif
1145 #ifdef HAVE_TOMATO
1146 void tomato_helper(time_t now);
1147 #endif
1148 #ifdef HAVE_LEASEFILE_EXPIRE //originally TOMATO option
1149 void flush_lease_file(time_t now);
1150 #endif
1151 void send_alarm(time_t event, time_t now);
1152 void send_event(int fd, int event, int data, char *msg);
1153 void clear_cache_and_reload(time_t now);
1154 void poll_resolv(int force, int do_reload, time_t now);
1155
1156 /* netlink.c */
1157 #ifdef HAVE_LINUX_NETWORK
1158 void netlink_init(void);
1159 void netlink_multicast(time_t now);
1160 #endif
1161
1162 /* bpf.c */
1163 #ifdef HAVE_BSD_NETWORK
1164 void init_bpf(void);
1165 void send_via_bpf(struct dhcp_packet *mess, size_t len,
1166                   struct in_addr iface_addr, struct ifreq *ifr);
1167 #endif
1168
1169 /* bpf.c or netlink.c */
1170 int iface_enumerate(int family, void *parm, int (callback)());
1171
1172 /* dbus.c */
1173 #ifdef HAVE_DBUS
1174 char *dbus_init(void);
1175 void check_dbus_listeners(fd_set *rset, fd_set *wset, fd_set *eset);
1176 void set_dbus_listeners(int *maxfdp, fd_set *rset, fd_set *wset, fd_set *eset);
1177 #  ifdef HAVE_DHCP
1178 void emit_dbus_signal(int action, struct dhcp_lease *lease, char *hostname);
1179 #  endif
1180 #endif
1181
1182 /* ipset.c */
1183 #ifdef HAVE_IPSET
1184 void ipset_init(void);
1185 int add_to_ipset(const char *setname, const struct all_addr *ipaddr, int flags, int remove);
1186 #endif
1187
1188 /* helper.c */
1189 #if defined(HAVE_SCRIPT)
1190 int create_helper(int event_fd, int err_fd, uid_t uid, gid_t gid, long max_fd);
1191 void helper_write(void);
1192 void queue_script(int action, struct dhcp_lease *lease,
1193                   char *hostname, time_t now);
1194 #ifdef HAVE_TFTP
1195 void queue_tftp(off_t file_len, char *filename, union mysockaddr *peer);
1196 #endif
1197 int helper_buf_empty(void);
1198 #endif
1199
1200 /* tftp.c */
1201 #ifdef HAVE_TFTP
1202 void tftp_request(struct listener *listen, time_t now);
1203 void check_tftp_listeners(fd_set *rset, time_t now);
1204 int do_tftp_script_run(void);
1205 #endif
1206
1207 /* conntrack.c */
1208 #ifdef HAVE_CONNTRACK
1209 int get_incoming_mark(union mysockaddr *peer_addr, struct all_addr *local_addr,
1210                       int istcp, unsigned int *markp);
1211 #endif
1212
1213 /* dhcp6.c */
1214 #ifdef HAVE_DHCP6
1215 void dhcp6_init(void);
1216 void dhcp6_packet(time_t now);
1217 struct dhcp_context *address6_allocate(struct dhcp_context *context,  unsigned char *clid, int clid_len,
1218                                        int iaid, int serial, struct dhcp_netid *netids, int plain_range, struct in6_addr *ans);
1219 int config_valid(struct dhcp_config *config, struct dhcp_context *context, struct in6_addr *addr);
1220 struct dhcp_context *address6_available(struct dhcp_context *context,
1221                                         struct in6_addr *taddr,
1222                                         struct dhcp_netid *netids,
1223                                         int plain_range);
1224 struct dhcp_context *address6_valid(struct dhcp_context *context,
1225                                     struct in6_addr *taddr,
1226                                     struct dhcp_netid *netids,
1227                                     int plain_range);
1228 struct dhcp_config *find_config6(struct dhcp_config *configs,
1229                                  struct dhcp_context *context,
1230                                  unsigned char *duid, int duid_len,
1231                                  char *hostname);
1232 struct dhcp_config *config_find_by_address6(struct dhcp_config *configs, struct in6_addr *net,
1233                                             int prefix, u64 addr);
1234 void make_duid(time_t now);
1235 void dhcp_construct_contexts(time_t now);
1236 #endif
1237
1238 /* rfc3315.c */
1239 #ifdef HAVE_DHCP6
1240 unsigned short dhcp6_reply(struct dhcp_context *context, int interface, char *iface_name,
1241                            struct in6_addr *fallback, size_t sz, int is_multicast, time_t now);
1242 void relay_upstream6(struct dhcp_relay *relay, ssize_t sz, struct in6_addr *peer_address, u32 scope_id);
1243
1244 unsigned short relay_reply6( struct sockaddr_in6 *peer, ssize_t sz, char *arrival_interface);
1245 #endif
1246
1247 /* dhcp-common.c */
1248 #ifdef HAVE_DHCP
1249 void dhcp_common_init(void);
1250 ssize_t recv_dhcp_packet(int fd, struct msghdr *msg);
1251 struct dhcp_netid *run_tag_if(struct dhcp_netid *input);
1252 struct dhcp_netid *option_filter(struct dhcp_netid *tags, struct dhcp_netid *context_tags,
1253                                  struct dhcp_opt *opts);
1254 int match_netid(struct dhcp_netid *check, struct dhcp_netid *pool, int negonly);
1255 char *strip_hostname(char *hostname);
1256 void log_tags(struct dhcp_netid *netid, u32 xid);
1257 int match_bytes(struct dhcp_opt *o, unsigned char *p, int len);
1258 void dhcp_update_configs(struct dhcp_config *configs);
1259 void display_opts(void);
1260 int lookup_dhcp_opt(int prot, char *name);
1261 int lookup_dhcp_len(int prot, int val);
1262 char *option_string(int prot, unsigned int opt, unsigned char *val,
1263                     int opt_len, char *buf, int buf_len);
1264 #ifdef HAVE_LINUX_NETWORK
1265 void bindtodevice(int fd);
1266 #endif
1267 #  ifdef HAVE_DHCP6
1268 void display_opts6(void);
1269 #  endif
1270 void log_context(int family, struct dhcp_context *context);
1271 void log_relay(int family, struct dhcp_relay *relay);
1272 #endif
1273
1274 /* outpacket.c */
1275 #ifdef HAVE_DHCP6
1276 void end_opt6(int container);
1277 int save_counter(int newval);
1278 void *expand(size_t headroom);
1279 int new_opt6(int opt);
1280 void *put_opt6(void *data, size_t len);
1281 void put_opt6_long(unsigned int val);
1282 void put_opt6_short(unsigned int val);
1283 void put_opt6_char(unsigned int val);
1284 void put_opt6_string(char *s);
1285 #endif
1286
1287 /* radv.c */
1288 #ifdef HAVE_DHCP6
1289 void ra_init(time_t now);
1290 void icmp6_packet(time_t now);
1291 time_t periodic_ra(time_t now);
1292 void ra_start_unsolicted(time_t now, struct dhcp_context *context);
1293 #endif
1294
1295 /* slaac.c */
1296 #ifdef HAVE_DHCP6
1297 void slaac_add_addrs(struct dhcp_lease *lease, time_t now, int force);
1298 time_t periodic_slaac(time_t now, struct dhcp_lease *leases);
1299 void slaac_ping_reply(struct in6_addr *sender, unsigned char *packet, char *interface, struct dhcp_lease *leases);
1300 #endif