src/dnsmasq.h

   1 /* dnsmasq is Copyright (c) 2000-2012 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) 2000-2012 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_LAST           41
 225
 226 /* extra flags for my_syslog, we use a couple of facilities since they are known
 227    not to occupy the same bits as priorities, no matter how syslog.h is set up. */
 228 #define MS_TFTP LOG_USER
 229 #define MS_DHCP LOG_DAEMON
 230
 231 struct all_addr {
 232   union {
 233     struct in_addr addr4;
 234 #ifdef HAVE_IPV6
 235     struct in6_addr addr6;
 236 #endif
 237   } addr;
 238 };
 239
 240 struct bogus_addr {
 241   struct in_addr addr;
 242   struct bogus_addr *next;
 243 };
 244
 245 /* dns doctor param */
 246 struct doctor {
 247   struct in_addr in, end, out, mask;
 248   struct doctor *next;
 249 };
 250
 251 struct mx_srv_record {
 252   char *name, *target;
 253   int issrv, srvport, priority, weight;
 254   unsigned int offset;
 255   struct mx_srv_record *next;
 256 };
 257
 258 struct naptr {
 259   char *name, *replace, *regexp, *services, *flags;
 260   unsigned int order, pref;
 261   struct naptr *next;
 262 };
 263
 264 struct txt_record {
 265   char *name;
 266   unsigned char *txt;
 267   unsigned short class, len;
 268   struct txt_record *next;
 269 };
 270
 271 struct ptr_record {
 272   char *name, *ptr;
 273   struct ptr_record *next;
 274 };
 275
 276 struct cname {
 277   char *alias, *target;
 278   struct cname *next;
 279 };
 280
 281 struct auth_zone {
 282   char *domain;
 283   struct subnet {
 284     int is6, prefixlen;
 285     struct in_addr addr4;
 286 #ifdef HAVE_IPV6
 287     struct in6_addr addr6;
 288 #endif
 289     struct subnet *next;
 290   } *subnet;
 291   struct auth_zone *next;
 292 };
 293
 294
 295 struct host_record {
 296   struct name_list {
 297     char *name;
 298     struct name_list *next;
 299   } *names;
 300   struct in_addr addr;
 301 #ifdef HAVE_IPV6
 302   struct in6_addr addr6;
 303 #endif
 304   struct host_record *next;
 305 };
 306
 307 struct interface_name {
 308   char *name; /* domain name */
 309   char *intr; /* interface name */
 310   struct interface_name *next;
 311 };
 312
 313 union bigname {
 314   char name[MAXDNAME];
 315   union bigname *next; /* freelist */
 316 };
 317
 318 struct keydata {
 319   struct keydata *next;
 320   unsigned char key[KEYBLOCK_LEN];
 321 };
 322
 323 struct crec {
 324   struct crec *next, *prev, *hash_next;
 325   /* union is 16 bytes when doing IPv6, 8 bytes on 32 bit machines without IPv6 */
 326   union {
 327     struct all_addr addr;
 328     struct {
 329       struct crec *cache;
 330       int uid;
 331     } cname;
 332     struct {
 333       struct keydata *keydata;
 334       unsigned char algo;
 335       unsigned char digest; /* DS only */
 336       unsigned short flags_or_keyid; /* flags for DNSKEY, keyid for DS */
 337     } key;
 338   } addr;
 339   time_t ttd; /* time to die */
 340   /* used as keylen if F_DS or F_DNSKEY, index to source for F_HOSTS */
 341   int uid;
 342   unsigned short flags;
 343   union {
 344     char sname[SMALLDNAME];
 345     union bigname *bname;
 346     char *namep;
 347   } name;
 348 };
 349
 350 #define F_IMMORTAL  (1u<<0)
 351 #define F_NAMEP     (1u<<1)
 352 #define F_REVERSE   (1u<<2)
 353 #define F_FORWARD   (1u<<3)
 354 #define F_DHCP      (1u<<4)
 355 #define F_NEG       (1u<<5)
 356 #define F_HOSTS     (1u<<6)
 357 #define F_IPV4      (1u<<7)
 358 #define F_IPV6      (1u<<8)
 359 #define F_BIGNAME   (1u<<9)
 360 #define F_NXDOMAIN  (1u<<10)
 361 #define F_CNAME     (1u<<11)
 362 #define F_DNSKEY    (1u<<12)
 363 #define F_CONFIG    (1u<<13)
 364 #define F_DS        (1u<<14)
 365 #define F_DNSSECOK  (1u<<15)
 366
 367 /* below here are only valid as args to log_query: cache
 368    entries are limited to 16 bits */
 369 #define F_UPSTREAM  (1u<<16)
 370 #define F_RRNAME    (1u<<17)
 371 #define F_SERVER    (1u<<18)
 372 #define F_QUERY     (1u<<19)
 373 #define F_NOERR     (1u<<20)
 374 #define F_AUTH      (1u<<21)
 375
 376 /* composites */
 377 #define F_TYPE      (F_IPV4 | F_IPV6 | F_DNSKEY | F_DS) /* Only one may be set */
 378
 379
 380
 381 /* struct sockaddr is not large enough to hold any address,
 382    and specifically not big enough to hold an IPv6 address.
 383    Blech. Roll our own. */
 384 union mysockaddr {
 385   struct sockaddr sa;
 386   struct sockaddr_in in;
 387 #if defined(HAVE_IPV6)
 388   struct sockaddr_in6 in6;
 389 #endif
 390 };
 391
 392 /* bits in flag param to IPv6 callbacks from iface_enumerate() */
 393 #define IFACE_TENTATIVE   1
 394 #define IFACE_DEPRECATED  2
 395
 396
 397 #define SERV_FROM_RESOLV       1  /* 1 for servers from resolv, 0 for command line. */
 398 #define SERV_NO_ADDR           2  /* no server, this domain is local only */
 399 #define SERV_LITERAL_ADDRESS   4  /* addr is the answer, not the server */
 400 #define SERV_HAS_DOMAIN        8  /* server for one domain only */
 401 #define SERV_HAS_SOURCE       16  /* source address defined */
 402 #define SERV_FOR_NODOTS       32  /* server for names with no domain part only */
 403 #define SERV_WARNED_RECURSIVE 64  /* avoid warning spam */
 404 #define SERV_FROM_DBUS       128  /* 1 if source is DBus */
 405 #define SERV_MARK            256  /* for mark-and-delete */
 406 #define SERV_TYPE    (SERV_HAS_DOMAIN | SERV_FOR_NODOTS)
 407 #define SERV_COUNTED         512  /* workspace for log code */
 408 #define SERV_USE_RESOLV     1024  /* forward this domain in the normal way */
 409 #define SERV_NO_REBIND      2048  /* inhibit dns-rebind protection */
 410
 411 struct serverfd {
 412   int fd;
 413   union mysockaddr source_addr;
 414   char interface[IF_NAMESIZE+1];
 415   struct serverfd *next;
 416 };
 417
 418 struct randfd {
 419   int fd;
 420   unsigned short refcount, family;
 421 };
 422
 423 struct server {
 424   union mysockaddr addr, source_addr;
 425   char interface[IF_NAMESIZE+1];
 426   struct serverfd *sfd;
 427   char *domain; /* set if this server only handles a domain. */
 428   int flags, tcpfd;
 429   unsigned int queries, failed_queries;
 430   struct server *next;
 431 };
 432
 433 struct irec {
 434   union mysockaddr addr;
 435   struct in_addr netmask; /* only valid for IPv4 */
 436   int tftp_ok, dhcp_ok, mtu, done, dad, dns_auth, index, multicast_done;
 437   char *name;
 438   struct irec *next;
 439 };
 440
 441 struct listener {
 442   int fd, tcpfd, tftpfd, family;
 443   struct irec *iface; /* only sometimes valid for non-wildcard */
 444   struct listener *next;
 445 };
 446
 447 /* interface and address parms from command line. */
 448 struct iname {
 449   char *name;
 450   union mysockaddr addr;
 451   int used;
 452   struct iname *next;
 453 };
 454
 455 /* resolv-file parms from command-line */
 456 struct resolvc {
 457   struct resolvc *next;
 458   int is_default, logged;
 459   time_t mtime;
 460   char *name;
 461 };
 462
 463 /* adn-hosts parms from command-line (also dhcp-hostsfile and dhcp-optsfile */
 464 #define AH_DIR      1
 465 #define AH_INACTIVE 2
 466 struct hostsfile {
 467   struct hostsfile *next;
 468   int flags;
 469   char *fname;
 470   int index; /* matches to cache entries for logging */
 471 };
 472
 473 #define FREC_NOREBIND           1
 474 #define FREC_CHECKING_DISABLED  2
 475
 476 struct frec {
 477   union mysockaddr source;
 478   struct all_addr dest;
 479   struct server *sentto; /* NULL means free */
 480   struct randfd *rfd4;
 481 #ifdef HAVE_IPV6
 482   struct randfd *rfd6;
 483 #endif
 484   unsigned int iface;
 485   unsigned short orig_id, new_id;
 486   int fd, forwardall, flags;
 487   unsigned int crc;
 488   time_t time;
 489   struct frec *next;
 490 };
 491
 492 /* flags in top of length field for DHCP-option tables */
 493 #define OT_ADDR_LIST    0x8000
 494 #define OT_RFC1035_NAME 0x4000
 495 #define OT_INTERNAL     0x2000
 496 #define OT_NAME         0x1000
 497 #define OT_CSTRING      0x0800
 498 #define OT_DEC          0x0400
 499 #define OT_TIME         0x0200
 500
 501 /* actions in the daemon->helper RPC */
 502 #define ACTION_DEL           1
 503 #define ACTION_OLD_HOSTNAME  2
 504 #define ACTION_OLD           3
 505 #define ACTION_ADD           4
 506 #define ACTION_TFTP          5
 507
 508 #define LEASE_NEW            1  /* newly created */
 509 #define LEASE_CHANGED        2  /* modified */
 510 #define LEASE_AUX_CHANGED    4  /* CLID or expiry changed */
 511 #define LEASE_AUTH_NAME      8  /* hostname came from config, not from client */
 512 #define LEASE_USED          16  /* used this DHCPv6 transaction */
 513 #define LEASE_NA            32  /* IPv6 no-temporary lease */
 514 #define LEASE_TA            64  /* IPv6 temporary lease */
 515 #define LEASE_HAVE_HWADDR  128  /* Have set hwaddress */
 516
 517 struct dhcp_lease {
 518   int clid_len;          /* length of client identifier */
 519   unsigned char *clid;   /* clientid */
 520   char *hostname, *fqdn; /* name from client-hostname option or config */
 521   char *old_hostname;    /* hostname before it moved to another lease */
 522   int flags;
 523   time_t expires;        /* lease expiry */
 524 #ifdef HAVE_BROKEN_RTC
 525   unsigned int length;
 526 #endif
 527   int hwaddr_len, hwaddr_type; /* hw_type used for iaid in v6 */
 528   unsigned char hwaddr[DHCP_CHADDR_MAX]; /* also IPv6 address */
 529   struct in_addr addr, override, giaddr;
 530   unsigned char *extradata;
 531   unsigned int extradata_len, extradata_size;
 532   int last_interface;
 533 #ifdef HAVE_DHCP6
 534   struct slaac_address {
 535     struct in6_addr addr, local;
 536     time_t ping_time;
 537     int backoff; /* zero -> confirmed */
 538     struct slaac_address *next;
 539   } *slaac_address;
 540 #endif
 541   struct dhcp_lease *next;
 542 };
 543
 544 struct dhcp_netid {
 545   char *net;
 546   struct dhcp_netid *next;
 547 };
 548
 549 struct dhcp_netid_list {
 550   struct dhcp_netid *list;
 551   struct dhcp_netid_list *next;
 552 };
 553
 554 struct tag_if {
 555   struct dhcp_netid_list *set;
 556   struct dhcp_netid *tag;
 557   struct tag_if *next;
 558 };
 559
 560 struct hwaddr_config {
 561   int hwaddr_len, hwaddr_type;
 562   unsigned char hwaddr[DHCP_CHADDR_MAX];
 563   unsigned int wildcard_mask;
 564   struct hwaddr_config *next;
 565 };
 566
 567 struct dhcp_config {
 568   unsigned int flags;
 569   int clid_len;          /* length of client identifier */
 570   unsigned char *clid;   /* clientid */
 571   char *hostname, *domain;
 572   struct dhcp_netid_list *netid;
 573 #ifdef HAVE_DHCP6
 574   struct in6_addr addr6;
 575 #endif
 576   struct in_addr addr;
 577   time_t decline_time;
 578   unsigned int lease_time;
 579   struct hwaddr_config *hwaddr;
 580   struct dhcp_config *next;
 581 };
 582
 583 #define have_config(config, mask) ((config) && ((config)->flags & (mask)))
 584
 585 #define CONFIG_DISABLE           1
 586 #define CONFIG_CLID              2
 587 #define CONFIG_TIME              8
 588 #define CONFIG_NAME             16
 589 #define CONFIG_ADDR             32
 590 #define CONFIG_NOCLID          128
 591 #define CONFIG_FROM_ETHERS     256    /* entry created by /etc/ethers */
 592 #define CONFIG_ADDR_HOSTS      512    /* address added by from /etc/hosts */
 593 #define CONFIG_DECLINED       1024    /* address declined by client */
 594 #define CONFIG_BANK           2048    /* from dhcp hosts file */
 595 #define CONFIG_ADDR6          4096
 596 #define CONFIG_WILDCARD       8192
 597
 598 struct dhcp_opt {
 599   int opt, len, flags;
 600   union {
 601     int encap;
 602     unsigned int wildcard_mask;
 603     unsigned char *vendor_class;
 604   } u;
 605   unsigned char *val;
 606   struct dhcp_netid *netid;
 607   struct dhcp_opt *next;
 608 };
 609
 610 #define DHOPT_ADDR               1
 611 #define DHOPT_STRING             2
 612 #define DHOPT_ENCAPSULATE        4
 613 #define DHOPT_ENCAP_MATCH        8
 614 #define DHOPT_FORCE             16
 615 #define DHOPT_BANK              32
 616 #define DHOPT_ENCAP_DONE        64
 617 #define DHOPT_MATCH            128
 618 #define DHOPT_VENDOR           256
 619 #define DHOPT_HEX              512
 620 #define DHOPT_VENDOR_MATCH    1024
 621 #define DHOPT_RFC3925         2048
 622 #define DHOPT_TAGOK           4096
 623 #define DHOPT_ADDR6           8192
 624
 625 struct dhcp_boot {
 626   char *file, *sname, *tftp_sname;
 627   struct in_addr next_server;
 628   struct dhcp_netid *netid;
 629   struct dhcp_boot *next;
 630 };
 631
 632 struct pxe_service {
 633   unsigned short CSA, type;
 634   char *menu, *basename, *sname;
 635   struct in_addr server;
 636   struct dhcp_netid *netid;
 637   struct pxe_service *next;
 638 };
 639
 640 #define MATCH_VENDOR     1
 641 #define MATCH_USER       2
 642 #define MATCH_CIRCUIT    3
 643 #define MATCH_REMOTE     4
 644 #define MATCH_SUBSCRIBER 5
 645
 646 /* vendorclass, userclass, remote-id or cicuit-id */
 647 struct dhcp_vendor {
 648   int len, match_type;
 649   unsigned int enterprise;
 650   char *data;
 651   struct dhcp_netid netid;
 652   struct dhcp_vendor *next;
 653 };
 654
 655 struct dhcp_mac {
 656   unsigned int mask;
 657   int hwaddr_len, hwaddr_type;
 658   unsigned char hwaddr[DHCP_CHADDR_MAX];
 659   struct dhcp_netid netid;
 660   struct dhcp_mac *next;
 661 };
 662
 663 struct dhcp_bridge {
 664   char iface[IF_NAMESIZE];
 665   struct dhcp_bridge *alias, *next;
 666 };
 667
 668 struct cond_domain {
 669   char *domain;
 670   struct in_addr start, end;
 671 #ifdef HAVE_IPV6
 672   struct in6_addr start6, end6;
 673 #endif
 674   int is6;
 675   struct cond_domain *next;
 676 };
 677
 678 struct dhcp_context {
 679   unsigned int lease_time, addr_epoch;
 680   struct in_addr netmask, broadcast;
 681   struct in_addr local, router;
 682   struct in_addr start, end; /* range of available addresses */
 683 #ifdef HAVE_DHCP6
 684   struct in6_addr start6, end6; /* range of available addresses */
 685   struct in6_addr local6;
 686   int prefix, if_index;
 687   unsigned int valid, preferred;
 688   time_t ra_time, ra_short_period_start;
 689   char *template_interface;
 690 #endif
 691   int flags;
 692   struct dhcp_netid netid, *filter;
 693   struct dhcp_context *next, *current;
 694 };
 695
 696 #define CONTEXT_STATIC         1
 697 #define CONTEXT_NETMASK        2
 698 #define CONTEXT_BRDCAST        4
 699 #define CONTEXT_PROXY          8
 700 #define CONTEXT_RA_ONLY       16
 701 #define CONTEXT_RA_DONE       32
 702 #define CONTEXT_RA_NAME       64
 703 #define CONTEXT_RA_STATELESS 128
 704 #define CONTEXT_DHCP         256
 705 #define CONTEXT_DEPRECATE    512
 706 #define CONTEXT_TEMPLATE    1024    /* create contexts using addresses */
 707 #define CONTEXT_CONSTRUCTED 2048
 708 #define CONTEXT_GC          4096
 709 #define CONTEXT_RA          8192
 710 #define CONTEXT_WILDCARD   16384
 711
 712 struct ping_result {
 713   struct in_addr addr;
 714   time_t time;
 715   unsigned int hash;
 716   struct ping_result *next;
 717 };
 718
 719 struct tftp_file {
 720   int refcount, fd;
 721   off_t size;
 722   dev_t dev;
 723   ino_t inode;
 724   char filename[];
 725 };
 726
 727 struct tftp_transfer {
 728   int sockfd;
 729   time_t timeout;
 730   int backoff;
 731   unsigned int block, blocksize, expansion;
 732   off_t offset;
 733   union mysockaddr peer;
 734   char opt_blocksize, opt_transize, netascii, carrylf;
 735   struct tftp_file *file;
 736   struct tftp_transfer *next;
 737 };
 738
 739 struct addr_list {
 740   struct in_addr addr;
 741   struct addr_list *next;
 742 };
 743
 744 struct tftp_prefix {
 745   char *interface;
 746   char *prefix;
 747   struct tftp_prefix *next;
 748 };
 749
 750
 751 extern struct daemon {
 752   /* datastuctures representing the command-line and
 753      config file arguments. All set (including defaults)
 754      in option.c */
 755
 756   unsigned int options, options2;
 757   struct resolvc default_resolv, *resolv_files;
 758   time_t last_resolv;
 759   struct mx_srv_record *mxnames;
 760   struct naptr *naptr;
 761   struct txt_record *txt, *rr;
 762   struct ptr_record *ptr;
 763   struct host_record *host_records, *host_records_tail;
 764   struct cname *cnames;
 765   struct auth_zone *auth_zones;
 766   struct interface_name *int_names;
 767   char *mxtarget;
 768   char *lease_file;
 769   char *username, *groupname, *scriptuser;
 770   char *luascript;
 771   char *authserver, *hostmaster;
 772   struct iname *authinterface;
 773   struct name_list *secondary_forward_server;
 774   int group_set, osport;
 775   char *domain_suffix;
 776   struct cond_domain *cond_domain;
 777   char *runfile;
 778   char *lease_change_command;
 779   struct iname *if_names, *if_addrs, *if_except, *dhcp_except, *auth_peers;
 780   struct bogus_addr *bogus_addr;
 781   struct server *servers;
 782   int log_fac; /* log facility */
 783   char *log_file; /* optional log file */
 784   int max_logs;  /* queue limit */
 785   int cachesize, ftabsize;
 786   int port, query_port, min_port;
 787   unsigned long local_ttl, neg_ttl, max_ttl, max_cache_ttl, auth_ttl;
 788   struct hostsfile *addn_hosts;
 789   struct dhcp_context *dhcp, *dhcp6;
 790   struct dhcp_config *dhcp_conf;
 791   struct dhcp_opt *dhcp_opts, *dhcp_match, *dhcp_opts6, *dhcp_match6;
 792   struct dhcp_vendor *dhcp_vendors;
 793   struct dhcp_mac *dhcp_macs;
 794   struct dhcp_boot *boot_config;
 795   struct pxe_service *pxe_services;
 796   struct tag_if *tag_if;
 797   struct addr_list *override_relays;
 798   int override;
 799   int enable_pxe;
 800   int doing_ra, doing_dhcp6;
 801   struct dhcp_netid_list *dhcp_ignore, *dhcp_ignore_names, *dhcp_gen_names;
 802   struct dhcp_netid_list *force_broadcast, *bootp_dynamic;
 803   struct hostsfile *dhcp_hosts_file, *dhcp_opts_file;
 804   int dhcp_max, tftp_max;
 805   int dhcp_server_port, dhcp_client_port;
 806   int start_tftp_port, end_tftp_port;
 807   unsigned int min_leasetime;
 808   struct doctor *doctors;
 809   unsigned short edns_pktsz;
 810   char *tftp_prefix;
 811   struct tftp_prefix *if_prefix; /* per-interface TFTP prefixes */
 812   unsigned int duid_enterprise, duid_config_len;
 813   unsigned char *duid_config;
 814   char *dbus_name;
 815   unsigned long soa_sn, soa_refresh, soa_retry, soa_expiry;
 816
 817   /* globally used stuff for DNS */
 818   char *packet; /* packet buffer */
 819   int packet_buff_sz; /* size of above */
 820   char *namebuff; /* MAXDNAME size buffer */
 821   unsigned int local_answer, queries_forwarded;
 822   struct frec *frec_list;
 823   struct serverfd *sfds;
 824   struct irec *interfaces;
 825   struct listener *listeners;
 826   struct server *last_server;
 827   time_t forwardtime;
 828   int forwardcount;
 829   struct server *srv_save; /* Used for resend on DoD */
 830   size_t packet_len;       /*      "        "        */
 831   struct randfd *rfd_save; /*      "        "        */
 832   pid_t tcp_pids[MAX_PROCS];
 833   struct randfd randomsocks[RANDOM_SOCKS];
 834   int v6pktinfo;
 835
 836   /* DHCP state */
 837   int dhcpfd, helperfd, pxefd;
 838 #if defined(HAVE_LINUX_NETWORK)
 839   int netlinkfd;
 840 #elif defined(HAVE_BSD_NETWORK)
 841   int dhcp_raw_fd, dhcp_icmp_fd;
 842 #endif
 843   struct iovec dhcp_packet;
 844   char *dhcp_buff, *dhcp_buff2, *dhcp_buff3;
 845   struct ping_result *ping_results;
 846   FILE *lease_stream;
 847   struct dhcp_bridge *bridges;
 848 #ifdef HAVE_DHCP6
 849   int duid_len;
 850   unsigned char *duid;
 851   struct iovec outpacket;
 852   int dhcp6fd, icmp6fd;
 853 #endif
 854   /* DBus stuff */
 855   /* void * here to avoid depending on dbus headers outside dbus.c */
 856   void *dbus;
 857 #ifdef HAVE_DBUS
 858   struct watch *watches;
 859 #endif
 860
 861   /* TFTP stuff */
 862   struct tftp_transfer *tftp_trans, *tftp_done_trans;
 863
 864   /* utility string buffer, hold max sized IP address as string */
 865   char *addrbuff;
 866
 867 } *daemon;
 868
 869 /* cache.c */
 870 void cache_init(void);
 871 void log_query(unsigned int flags, char *name, struct all_addr *addr, char *arg);
 872 char *record_source(int index);
 873 void querystr(char *desc, char *str, unsigned short type);
 874 struct crec *cache_find_by_addr(struct crec *crecp,
 875                                 struct all_addr *addr, time_t now,
 876                                 unsigned short prot);
 877 struct crec *cache_find_by_name(struct crec *crecp,
 878                                 char *name, time_t now, unsigned short  prot);
 879 void cache_end_insert(void);
 880 void cache_start_insert(void);
 881 struct crec *cache_insert(char *name, struct all_addr *addr,
 882                           time_t now, unsigned long ttl, unsigned short flags);
 883 void cache_reload(void);
 884 void cache_add_dhcp_entry(char *host_name, int prot, struct all_addr *host_address, time_t ttd);
 885 struct in_addr a_record_from_hosts(char *name, time_t now);
 886 void cache_unhash_dhcp(void);
 887 void dump_cache(time_t now);
 888 char *cache_get_name(struct crec *crecp);
 889 struct crec *cache_enumerate(int init);
 890 char *get_domain(struct in_addr addr);
 891 #ifdef HAVE_IPV6
 892 char *get_domain6(struct in6_addr *addr);
 893 #endif
 894 #ifdef HAVE_DNSSEC
 895 struct keydata *keydata_alloc(char *data, size_t len);
 896 void keydata_free(struct keydata *blocks);
 897 #endif
 898
 899 /* rfc1035.c */
 900 unsigned int extract_request(struct dns_header *header, size_t qlen,
 901                                char *name, unsigned short *typep);
 902 size_t setup_reply(struct dns_header *header, size_t  qlen,
 903                    struct all_addr *addrp, unsigned int flags,
 904                    unsigned long local_ttl);
 905 int extract_addresses(struct dns_header *header, size_t qlen, char *namebuff,
 906                       time_t now, int is_sign, int checkrebind, int checking_disabled);
 907 size_t answer_request(struct dns_header *header, char *limit, size_t qlen,
 908                    struct in_addr local_addr, struct in_addr local_netmask, time_t now);
 909 int check_for_bogus_wildcard(struct dns_header *header, size_t qlen, char *name,
 910                              struct bogus_addr *addr, time_t now);
 911 unsigned char *find_pseudoheader(struct dns_header *header, size_t plen,
 912                                  size_t *len, unsigned char **p, int *is_sign);
 913 int check_for_local_domain(char *name, time_t now);
 914 unsigned int questions_crc(struct dns_header *header, size_t plen, char *buff);
 915 size_t resize_packet(struct dns_header *header, size_t plen,
 916                   unsigned char *pheader, size_t hlen);
 917 size_t add_mac(struct dns_header *header, size_t plen, char *limit, union mysockaddr *l3);
 918 int add_resource_record(struct dns_header *header, char *limit, int *truncp,
 919                         int nameoffset, unsigned char **pp, unsigned long ttl,
 920                         int *offset, unsigned short type, unsigned short class, char *format, ...);
 921 unsigned char *skip_questions(struct dns_header *header, size_t plen);
 922 int extract_name(struct dns_header *header, size_t plen, unsigned char **pp,
 923                  char *name, int isExtract, int extrabytes);
 924 int in_arpa_name_2_addr(char *namein, struct all_addr *addrp);
 925
 926 /* auth.c */
 927 #ifdef HAVE_AUTH
 928 size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t now, union mysockaddr *peer_addr);
 929 #endif
 930
 931 /* util.c */
 932 void rand_init(void);
 933 unsigned short rand16(void);
 934 int legal_hostname(char *c);
 935 char *canonicalise(char *s, int *nomem);
 936 unsigned char *do_rfc1035_name(unsigned char *p, char *sval);
 937 void *safe_malloc(size_t size);
 938 void safe_pipe(int *fd, int read_noblock);
 939 void *whine_malloc(size_t size);
 940 int sa_len(union mysockaddr *addr);
 941 int sockaddr_isequal(union mysockaddr *s1, union mysockaddr *s2);
 942 int hostname_isequal(const char *a, const char *b);
 943 time_t dnsmasq_time(void);
 944 int is_same_net(struct in_addr a, struct in_addr b, struct in_addr mask);
 945 #ifdef HAVE_IPV6
 946 int is_same_net6(struct in6_addr *a, struct in6_addr *b, int prefixlen);
 947 u64 addr6part(struct in6_addr *addr);
 948 void setaddr6part(struct in6_addr *addr, u64 host);
 949 #endif
 950 int retry_send(void);
 951 void prettyprint_time(char *buf, unsigned int t);
 952 int prettyprint_addr(union mysockaddr *addr, char *buf);
 953 int parse_hex(char *in, unsigned char *out, int maxlen,
 954               unsigned int *wildcard_mask, int *mac_type);
 955 int memcmp_masked(unsigned char *a, unsigned char *b, int len,
 956                   unsigned int mask);
 957 int expand_buf(struct iovec *iov, size_t size);
 958 char *print_mac(char *buff, unsigned char *mac, int len);
 959 void bump_maxfd(int fd, int *max);
 960 int read_write(int fd, unsigned char *packet, int size, int rw);
 961
 962 /* log.c */
 963 void die(char *message, char *arg1, int exit_code);
 964 int log_start(struct passwd *ent_pw, int errfd);
 965 int log_reopen(char *log_file);
 966 void my_syslog(int priority, const char *format, ...);
 967 void set_log_writer(fd_set *set, int *maxfdp);
 968 void check_log_writer(fd_set *set);
 969 void flush_log(void);
 970
 971 /* option.c */
 972 void read_opts (int argc, char **argv, char *compile_opts);
 973 char *option_string(int prot, unsigned int opt, unsigned char *val,
 974                     int opt_len, char *buf, int buf_len);
 975 void reread_dhcp(void);
 976 void set_option_bool(unsigned int opt);
 977 void reset_option_bool(unsigned int opt);
 978 struct hostsfile *expand_filelist(struct hostsfile *list);
 979 char *parse_server(char *arg, union mysockaddr *addr,
 980                    union mysockaddr *source_addr, char *interface, int *flags);
 981
 982 /* forward.c */
 983 void reply_query(int fd, int family, time_t now);
 984 void receive_query(struct listener *listen, time_t now);
 985 unsigned char *tcp_request(int confd, time_t now,
 986                            union mysockaddr *local_addr, struct in_addr netmask, int auth_dns);
 987 void server_gone(struct server *server);
 988 struct frec *get_new_frec(time_t now, int *wait);
 989 int send_from(int fd, int nowild, char *packet, size_t len,
 990                union mysockaddr *to, struct all_addr *source,
 991                unsigned int iface);
 992
 993 /* network.c */
 994 int indextoname(int fd, int index, char *name);
 995 int local_bind(int fd, union mysockaddr *addr, char *intname, int is_tcp);
 996 int random_sock(int family);
 997 void pre_allocate_sfds(void);
 998 int reload_servers(char *fname);
 999 void check_servers(void);
1000 int enumerate_interfaces();
1001 void create_wildcard_listeners(void);
1002 void create_bound_listeners(int die);
1003 int is_dad_listeners(void);
1004 int iface_check(int family, struct all_addr *addr, char *name, int *auth_dns);
1005 int loopback_exception(int fd, int family, struct all_addr *addr, char *name);
1006 int fix_fd(int fd);
1007 int tcp_interface(int fd, int af);
1008 struct in_addr get_ifaddr(char *intr);
1009 #ifdef HAVE_IPV6
1010 int set_ipv6pktinfo(int fd);
1011 #endif
1012 #ifdef HAVE_DHCP6
1013 void join_multicast(int dienow);
1014 #endif
1015
1016 /* dhcp.c */
1017 #ifdef HAVE_DHCP
1018 void dhcp_init(void);
1019 void dhcp_packet(time_t now, int pxe_fd);
1020 struct dhcp_context *address_available(struct dhcp_context *context,
1021                                        struct in_addr addr,
1022                                        struct dhcp_netid *netids);
1023 struct dhcp_context *narrow_context(struct dhcp_context *context,
1024                                     struct in_addr taddr,
1025                                     struct dhcp_netid *netids);
1026 int address_allocate(struct dhcp_context *context,
1027                      struct in_addr *addrp, unsigned char *hwaddr, int hw_len,
1028                      struct dhcp_netid *netids, time_t now);
1029 int config_has_mac(struct dhcp_config *config, unsigned char *hwaddr, int len, int type);
1030 struct dhcp_config *find_config(struct dhcp_config *configs,
1031                                 struct dhcp_context *context,
1032                                 unsigned char *clid, int clid_len,
1033                                 unsigned char *hwaddr, int hw_len,
1034                                 int hw_type, char *hostname);
1035 void dhcp_read_ethers(void);
1036 struct dhcp_config *config_find_by_address(struct dhcp_config *configs, struct in_addr addr);
1037 char *host_from_dns(struct in_addr addr);
1038 #endif
1039
1040 /* lease.c */
1041 #ifdef HAVE_DHCP
1042 void lease_update_file(time_t now);
1043 void lease_update_dns(int force);
1044 void lease_init(time_t now);
1045 struct dhcp_lease *lease4_allocate(struct in_addr addr);
1046 #ifdef HAVE_DHCP6
1047 struct dhcp_lease *lease6_allocate(struct in6_addr *addrp, int lease_type);
1048 struct dhcp_lease *lease6_find(unsigned char *clid, int clid_len,
1049                                int lease_type, int iaid, struct in6_addr *addr);
1050 void lease6_filter(int lease_type, int iaid, struct dhcp_context *context);
1051 struct dhcp_lease *lease6_find_by_addr(struct in6_addr *net, int prefix, u64 addr);
1052 u64 lease_find_max_addr6(struct dhcp_context *context);
1053 void lease_ping_reply(struct in6_addr *sender, unsigned char *packet, char *interface);
1054 void lease_update_slaac(time_t now);
1055 #endif
1056 void lease_set_hwaddr(struct dhcp_lease *lease, unsigned char *hwaddr,
1057                       unsigned char *clid, int hw_len, int hw_type, int clid_len, time_t now, int force);
1058 void lease_set_hostname(struct dhcp_lease *lease, char *name, int auth, char *domain, char *config_domain);
1059 void lease_set_expires(struct dhcp_lease *lease, unsigned int len, time_t now);
1060 void lease_set_interface(struct dhcp_lease *lease, int interface, time_t now);
1061 struct dhcp_lease *lease_find_by_client(unsigned char *hwaddr, int hw_len, int hw_type,
1062                                         unsigned char *clid, int clid_len);
1063 struct dhcp_lease *lease_find_by_addr(struct in_addr addr);
1064 struct in_addr lease_find_max_addr(struct dhcp_context *context);
1065 void lease_prune(struct dhcp_lease *target, time_t now);
1066 void lease_update_from_configs(void);
1067 int do_script_run(time_t now);
1068 void rerun_scripts(void);
1069 void lease_find_interfaces(time_t now);
1070 #ifdef HAVE_SCRIPT
1071 void lease_add_extradata(struct dhcp_lease *lease, unsigned char *data,
1072                          unsigned int len, int delim);
1073 #endif
1074 #endif
1075
1076 /* rfc2131.c */
1077 #ifdef HAVE_DHCP
1078 size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
1079                   size_t sz, time_t now, int unicast_dest, int *is_inform, int pxe_fd, struct in_addr fallback);
1080 unsigned char *extended_hwaddr(int hwtype, int hwlen, unsigned char *hwaddr,
1081                                int clid_len, unsigned char *clid, int *len_out);
1082 #endif
1083
1084 /* dnsmasq.c */
1085 #ifdef HAVE_DHCP
1086 int make_icmp_sock(void);
1087 int icmp_ping(struct in_addr addr);
1088 #endif
1089 void send_alarm(time_t event, time_t now);
1090 void send_event(int fd, int event, int data, char *msg);
1091 void clear_cache_and_reload(time_t now);
1092 void poll_resolv(int force, int do_reload, time_t now);
1093
1094 /* netlink.c */
1095 #ifdef HAVE_LINUX_NETWORK
1096 void netlink_init(void);
1097 void netlink_multicast(time_t now);
1098 #endif
1099
1100 /* bpf.c */
1101 #ifdef HAVE_BSD_NETWORK
1102 void init_bpf(void);
1103 void send_via_bpf(struct dhcp_packet *mess, size_t len,
1104                   struct in_addr iface_addr, struct ifreq *ifr);
1105 #endif
1106
1107 /* bpf.c or netlink.c */
1108 int iface_enumerate(int family, void *parm, int (callback)());
1109
1110 /* dbus.c */
1111 #ifdef HAVE_DBUS
1112 char *dbus_init(void);
1113 void check_dbus_listeners(fd_set *rset, fd_set *wset, fd_set *eset);
1114 void set_dbus_listeners(int *maxfdp, fd_set *rset, fd_set *wset, fd_set *eset);
1115 #  ifdef HAVE_DHCP
1116 void emit_dbus_signal(int action, struct dhcp_lease *lease, char *hostname);
1117 #  endif
1118 #endif
1119
1120 /* helper.c */
1121 #if defined(HAVE_SCRIPT)
1122 int create_helper(int event_fd, int err_fd, uid_t uid, gid_t gid, long max_fd);
1123 void helper_write(void);
1124 void queue_script(int action, struct dhcp_lease *lease,
1125                   char *hostname, time_t now);
1126 #ifdef HAVE_TFTP
1127 void queue_tftp(off_t file_len, char *filename, union mysockaddr *peer);
1128 #endif
1129 int helper_buf_empty(void);
1130 #endif
1131
1132 /* tftp.c */
1133 #ifdef HAVE_TFTP
1134 void tftp_request(struct listener *listen, time_t now);
1135 void check_tftp_listeners(fd_set *rset, time_t now);
1136 int do_tftp_script_run(void);
1137 #endif
1138
1139 /* conntrack.c */
1140 #ifdef HAVE_CONNTRACK
1141 int get_incoming_mark(union mysockaddr *peer_addr, struct all_addr *local_addr,
1142                       int istcp, unsigned int *markp);
1143 #endif
1144
1145 /* dhcp6.c */
1146 #ifdef HAVE_DHCP6
1147 void dhcp6_init(void);
1148 void dhcp6_packet(time_t now);
1149 int address6_allocate(struct dhcp_context *context,  unsigned char *clid, int clid_len,
1150                       int serial, struct dhcp_netid *netids, struct in6_addr *ans);
1151 int is_addr_in_context6(struct dhcp_context *context, struct in6_addr *addr);
1152 struct dhcp_context *address6_available(struct dhcp_context *context,
1153                                         struct in6_addr *taddr,
1154                                         struct dhcp_netid *netids);
1155 struct dhcp_context *address6_valid(struct dhcp_context *context,
1156                                     struct in6_addr *taddr,
1157                                     struct dhcp_netid *netids);
1158 struct dhcp_context *narrow_context6(struct dhcp_context *context,
1159                                      struct in6_addr *taddr,
1160                                      struct dhcp_netid *netids);
1161 struct dhcp_config *find_config6(struct dhcp_config *configs,
1162                                  struct dhcp_context *context,
1163                                  unsigned char *duid, int duid_len,
1164                                  char *hostname);
1165 struct dhcp_config *config_find_by_address6(struct dhcp_config *configs, struct in6_addr *net,
1166                                             int prefix, u64 addr);
1167 void make_duid(time_t now);
1168 void dhcp_construct_contexts(time_t now);
1169 #endif
1170
1171 /* rfc3315.c */
1172 #ifdef HAVE_DHCP6
1173 unsigned short dhcp6_reply(struct dhcp_context *context, int interface, char *iface_name,
1174                            struct in6_addr *fallback, size_t sz, int is_multicast, time_t now);
1175 #endif
1176
1177 /* dhcp-common.c */
1178 #ifdef HAVE_DHCP
1179 void dhcp_common_init(void);
1180 ssize_t recv_dhcp_packet(int fd, struct msghdr *msg);
1181 struct dhcp_netid *run_tag_if(struct dhcp_netid *input);
1182 struct dhcp_netid *option_filter(struct dhcp_netid *tags, struct dhcp_netid *context_tags,
1183                                  struct dhcp_opt *opts);
1184 int match_netid(struct dhcp_netid *check, struct dhcp_netid *pool, int negonly);
1185 char *strip_hostname(char *hostname);
1186 void log_tags(struct dhcp_netid *netid, u32 xid);
1187 int match_bytes(struct dhcp_opt *o, unsigned char *p, int len);
1188 void dhcp_update_configs(struct dhcp_config *configs);
1189 void display_opts(void);
1190 u16 lookup_dhcp_opt(int prot, char *name);
1191 u16 lookup_dhcp_len(int prot, u16 val);
1192 char *option_string(int prot, unsigned int opt, unsigned char *val,
1193                     int opt_len, char *buf, int buf_len);
1194 #ifdef HAVE_LINUX_NETWORK
1195 void bindtodevice(int fd);
1196 #endif
1197 #  ifdef HAVE_DHCP6
1198 void display_opts6(void);
1199 #  endif
1200 void log_context(int family, struct dhcp_context *context);
1201 #endif
1202
1203 /* outpacket.c */
1204 #ifdef HAVE_DHCP6
1205 void end_opt6(int container);
1206 int save_counter(int newval);
1207 void *expand(size_t headroom);
1208 int new_opt6(int opt);
1209 void *put_opt6(void *data, size_t len);
1210 void put_opt6_long(unsigned int val);
1211 void put_opt6_short(unsigned int val);
1212 void put_opt6_char(unsigned int val);
1213 void put_opt6_string(char *s);
1214 #endif
1215
1216 /* radv.c */
1217 #ifdef HAVE_DHCP6
1218 void ra_init(time_t now);
1219 void icmp6_packet(time_t now);
1220 time_t periodic_ra(time_t now);
1221 void ra_start_unsolicted(time_t now, struct dhcp_context *context);
1222 #endif
1223
1224 /* slaac.c */
1225 #ifdef HAVE_DHCP6
1226 void slaac_add_addrs(struct dhcp_lease *lease, time_t now, int force);
1227 time_t periodic_slaac(time_t now, struct dhcp_lease *leases);
1228 void slaac_ping_reply(struct in6_addr *sender, unsigned char *packet, char *interface, struct dhcp_lease *leases);
1229 #endif