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

   1 /* dnsmasq is Copyright (c) 2000-2014 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) 2000-2014 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 #include "ip6addr.h"
  54
  55 typedef unsigned char u8;
  56 typedef unsigned short u16;
  57 typedef unsigned int u32;
  58 typedef unsigned long long u64;
  59
  60 #define countof(x)      (long)(sizeof(x) / sizeof(x[0]))
  61 #define MIN(a,b)        ((a) < (b) ? (a) : (b))
  62
  63 #include "dns-protocol.h"
  64 #include "dhcp-protocol.h"
  65 #ifdef HAVE_DHCP6
  66 #include "dhcp6-protocol.h"
  67 #include "radv-protocol.h"
  68 #endif
  69
  70 #define gettext_noop(S) (S)
  71 #ifndef LOCALEDIR
  72 #  define _(S) (S)
  73 #else
  74 #  include <libintl.h>
  75 #  include <locale.h>
  76 #  define _(S) gettext(S)
  77 #endif
  78
  79 #include <arpa/inet.h>
  80 #include <sys/stat.h>
  81 #include <sys/ioctl.h>
  82 #if defined(HAVE_SOLARIS_NETWORK)
  83 #  include <sys/sockio.h>
  84 #endif
  85 #include <sys/select.h>
  86 #include <sys/wait.h>
  87 #include <sys/time.h>
  88 #include <sys/un.h>
  89 #include <limits.h>
  90 #include <net/if.h>
  91 #if defined(HAVE_SOLARIS_NETWORK) && !defined(ifr_mtu)
  92 /* Some solaris net/if./h omit this. */
  93 #  define ifr_mtu  ifr_ifru.ifru_metric
  94 #endif
  95 #include <unistd.h>
  96 #include <stdio.h>
  97 #include <string.h>
  98 #include <stdlib.h>
  99 #include <fcntl.h>
 100 #include <ctype.h>
 101 #include <signal.h>
 102 #include <stddef.h>
 103 #include <time.h>
 104 #include <errno.h>
 105 #include <pwd.h>
 106 #include <grp.h>
 107 #include <stdarg.h>
 108 #if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__sun__) || defined (__sun) || defined (__ANDROID__)
 109 #  include <netinet/if_ether.h>
 110 #else
 111 #  include <net/ethernet.h>
 112 #endif
 113 #include <net/if_arp.h>
 114 #include <netinet/in_systm.h>
 115 #include <netinet/ip.h>
 116 #include <netinet/ip_icmp.h>
 117 #include <sys/uio.h>
 118 #include <syslog.h>
 119 #include <dirent.h>
 120 #ifndef HAVE_LINUX_NETWORK
 121 #  include <net/if_dl.h>
 122 #endif
 123
 124 #if defined(HAVE_LINUX_NETWORK)
 125 #include <linux/capability.h>
 126 /* There doesn't seem to be a universally-available
 127    userpace header for these. */
 128 extern int capset(cap_user_header_t header, cap_user_data_t data);
 129 extern int capget(cap_user_header_t header, cap_user_data_t data);
 130 #define LINUX_CAPABILITY_VERSION_1  0x19980330
 131 #define LINUX_CAPABILITY_VERSION_2  0x20071026
 132 #define LINUX_CAPABILITY_VERSION_3  0x20080522
 133
 134 #include <sys/prctl.h>
 135 #elif defined(HAVE_SOLARIS_NETWORK)
 136 #include <priv.h>
 137 #endif
 138
 139 /* daemon is function in the C library.... */
 140 #define daemon dnsmasq_daemon
 141
 142 /* Async event queue */
 143 struct event_desc {
 144   int event, data, msg_sz;
 145 };
 146
 147 #define EVENT_RELOAD    1
 148 #define EVENT_DUMP      2
 149 #define EVENT_ALARM     3
 150 #define EVENT_TERM      4
 151 #define EVENT_CHILD     5
 152 #define EVENT_REOPEN    6
 153 #define EVENT_EXITED    7
 154 #define EVENT_KILLED    8
 155 #define EVENT_EXEC_ERR  9
 156 #define EVENT_PIPE_ERR  10
 157 #define EVENT_USER_ERR  11
 158 #define EVENT_CAP_ERR   12
 159 #define EVENT_PIDFILE   13
 160 #define EVENT_HUSER_ERR 14
 161 #define EVENT_GROUP_ERR 15
 162 #define EVENT_DIE       16
 163 #define EVENT_LOG_ERR   17
 164 #define EVENT_FORK_ERR  18
 165 #define EVENT_LUA_ERR   19
 166 #define EVENT_TFTP_ERR  20
 167 #define EVENT_INIT      21
 168 #define EVENT_NEWADDR   22
 169 #define EVENT_NEWROUTE  23
 170
 171 /* Exit codes. */
 172 #define EC_GOOD        0
 173 #define EC_BADCONF     1
 174 #define EC_BADNET      2
 175 #define EC_FILE        3
 176 #define EC_NOMEM       4
 177 #define EC_MISC        5
 178 #define EC_INIT_OFFSET 10
 179
 180 /* Min buffer size: we check after adding each record, so there must be
 181    memory for the largest packet, and the largest record so the
 182    min for DNS is PACKETSZ+MAXDNAME+RRFIXEDSZ which is < 1000.
 183    This might be increased is EDNS packet size if greater than the minimum.
 184 */
 185 #define DNSMASQ_PACKETSZ PACKETSZ+MAXDNAME+RRFIXEDSZ
 186
 187 /* Trust the compiler dead-code eliminator.... */
 188 #define option_bool(x) (((x) < 32) ? daemon->options & (1u << (x)) : daemon->options2 & (1u << ((x) - 32)))
 189
 190 #define OPT_BOGUSPRIV      0
 191 #define OPT_FILTER         1
 192 #define OPT_LOG            2
 193 #define OPT_SELFMX         3
 194 #define OPT_NO_HOSTS       4
 195 #define OPT_NO_POLL        5
 196 #define OPT_DEBUG          6
 197 #define OPT_ORDER          7
 198 #define OPT_NO_RESOLV      8
 199 #define OPT_EXPAND         9
 200 #define OPT_LOCALMX        10
 201 #define OPT_NO_NEG         11
 202 #define OPT_NODOTS_LOCAL   12
 203 #define OPT_NOWILD         13
 204 #define OPT_ETHERS         14
 205 #define OPT_RESOLV_DOMAIN  15
 206 #define OPT_NO_FORK        16
 207 #define OPT_AUTHORITATIVE  17
 208 #define OPT_LOCALISE       18
 209 #define OPT_DBUS           19
 210 #define OPT_DHCP_FQDN      20
 211 #define OPT_NO_PING        21
 212 #define OPT_LEASE_RO       22
 213 #define OPT_ALL_SERVERS    23
 214 #define OPT_RELOAD         24
 215 #define OPT_LOCAL_REBIND   25
 216 #define OPT_TFTP_SECURE    26
 217 #define OPT_TFTP_NOBLOCK   27
 218 #define OPT_LOG_OPTS       28
 219 #define OPT_TFTP_APREF     29
 220 #define OPT_NO_OVERRIDE    30
 221 #define OPT_NO_REBIND      31
 222 #define OPT_ADD_MAC        32
 223 #define OPT_DNSSEC_PROXY   33
 224 #define OPT_CONSEC_ADDR    34
 225 #define OPT_CONNTRACK      35
 226 #define OPT_FQDN_UPDATE    36
 227 #define OPT_RA             37
 228 #define OPT_TFTP_LC        38
 229 #define OPT_CLEVERBIND     39
 230 #define OPT_TFTP           40
 231 #define OPT_CLIENT_SUBNET  41
 232 #define OPT_QUIET_DHCP     42
 233 #define OPT_QUIET_DHCP6    43
 234 #define OPT_QUIET_RA       44
 235 #define OPT_DNSSEC_VALID   45
 236 #define OPT_DNSSEC_TIME    46
 237 #define OPT_DNSSEC_DEBUG   47
 238 #define OPT_DNSSEC_NO_SIGN 48
 239 #define OPT_LOCAL_SERVICE  49
 240 #define OPT_LOOP_DETECT    50
 241 #define OPT_LAST           51
 242
 243 /* extra flags for my_syslog, we use a couple of facilities since they are known
 244    not to occupy the same bits as priorities, no matter how syslog.h is set up. */
 245 #define MS_TFTP LOG_USER
 246 #define MS_DHCP LOG_DAEMON
 247
 248 struct all_addr {
 249   union {
 250     struct in_addr addr4;
 251 #ifdef HAVE_IPV6
 252     struct in6_addr addr6;
 253 #endif
 254     /* for log_query */
 255     unsigned int keytag;
 256     /* for cache_insert if RRSIG, DNSKEY, DS */
 257     struct {
 258       unsigned short class, type;
 259     } dnssec;
 260   } addr;
 261 };
 262
 263 struct bogus_addr {
 264   struct in_addr addr;
 265   struct bogus_addr *next;
 266 };
 267
 268 /* dns doctor param */
 269 struct doctor {
 270   struct in_addr in, end, out, mask;
 271   struct doctor *next;
 272 };
 273
 274 struct mx_srv_record {
 275   char *name, *target;
 276   int issrv, srvport, priority, weight;
 277   unsigned int offset;
 278   struct mx_srv_record *next;
 279 };
 280
 281 struct naptr {
 282   char *name, *replace, *regexp, *services, *flags;
 283   unsigned int order, pref;
 284   struct naptr *next;
 285 };
 286
 287 #define TXT_STAT_CACHESIZE     1
 288 #define TXT_STAT_INSERTS       2
 289 #define TXT_STAT_EVICTIONS     3
 290 #define TXT_STAT_MISSES        4
 291 #define TXT_STAT_HITS          5
 292 #define TXT_STAT_AUTH          6
 293 #define TXT_STAT_SERVERS       7
 294
 295 struct txt_record {
 296   char *name;
 297   unsigned char *txt;
 298   unsigned short class, len;
 299   int stat;
 300   struct txt_record *next;
 301 };
 302
 303 struct ptr_record {
 304   char *name, *ptr;
 305   struct ptr_record *next;
 306 };
 307
 308 struct cname {
 309   char *alias, *target;
 310   struct cname *next;
 311 };
 312
 313 struct ds_config {
 314   char *name, *digest;
 315   int digestlen, class, algo, keytag, digest_type;
 316   struct ds_config *next;
 317 };
 318
 319 #define ADDRLIST_LITERAL 1
 320 #define ADDRLIST_IPV6    2
 321
 322 struct addrlist {
 323   struct all_addr addr;
 324   int flags, prefixlen;
 325   struct addrlist *next;
 326 };
 327
 328 #define AUTH6     1
 329 #define AUTH4     2
 330
 331 struct auth_zone {
 332   char *domain;
 333   struct auth_name_list {
 334     char *name;
 335     int flags;
 336     struct auth_name_list *next;
 337   } *interface_names;
 338   struct addrlist *subnet;
 339   struct auth_zone *next;
 340 };
 341
 342
 343 struct host_record {
 344   struct name_list {
 345     char *name;
 346     struct name_list *next;
 347   } *names;
 348   struct in_addr addr;
 349 #ifdef HAVE_IPV6
 350   struct in6_addr addr6;
 351 #endif
 352   struct host_record *next;
 353 };
 354
 355 struct interface_name {
 356   char *name; /* domain name */
 357   char *intr; /* interface name */
 358   int family; /* AF_INET, AF_INET6 or zero for both */
 359   struct addrlist *addr;
 360   struct interface_name *next;
 361 };
 362
 363 union bigname {
 364   char name[MAXDNAME];
 365   union bigname *next; /* freelist */
 366 };
 367
 368 struct blockdata {
 369   struct blockdata *next;
 370   unsigned char key[KEYBLOCK_LEN];
 371 };
 372
 373 struct crec {
 374   struct crec *next, *prev, *hash_next;
 375   /* union is 16 bytes when doing IPv6, 8 bytes on 32 bit machines without IPv6 */
 376   union {
 377     struct all_addr addr;
 378     struct {
 379       union {
 380         struct crec *cache;
 381         struct interface_name *int_name;
 382       } target;
 383       unsigned int uid; /* 0 if union is interface-name */
 384     } cname;
 385     struct {
 386       struct blockdata *keydata;
 387       unsigned short keylen, flags, keytag;
 388       unsigned char algo;
 389     } key;
 390     struct {
 391       struct blockdata *keydata;
 392       unsigned short keylen, keytag;
 393       unsigned char algo;
 394       unsigned char digest;
 395     } ds;
 396     struct {
 397       struct blockdata *keydata;
 398       unsigned short keylen, type_covered, keytag;
 399       char algo;
 400     } sig;
 401   } addr;
 402   time_t ttd; /* time to die */
 403   /* used as class if DNSKEY/DS/RRSIG, index to source for F_HOSTS */
 404   unsigned int uid;
 405   unsigned short flags;
 406   union {
 407     char sname[SMALLDNAME];
 408     union bigname *bname;
 409     char *namep;
 410   } name;
 411 };
 412
 413 #define F_IMMORTAL  (1u<<0)
 414 #define F_NAMEP     (1u<<1)
 415 #define F_REVERSE   (1u<<2)
 416 #define F_FORWARD   (1u<<3)
 417 #define F_DHCP      (1u<<4)
 418 #define F_NEG       (1u<<5)
 419 #define F_HOSTS     (1u<<6)
 420 #define F_IPV4      (1u<<7)
 421 #define F_IPV6      (1u<<8)
 422 #define F_BIGNAME   (1u<<9)
 423 #define F_NXDOMAIN  (1u<<10)
 424 #define F_CNAME     (1u<<11)
 425 #define F_DNSKEY    (1u<<12)
 426 #define F_CONFIG    (1u<<13)
 427 #define F_DS        (1u<<14)
 428 #define F_DNSSECOK  (1u<<15)
 429
 430 /* below here are only valid as args to log_query: cache
 431    entries are limited to 16 bits */
 432 #define F_UPSTREAM  (1u<<16)
 433 #define F_RRNAME    (1u<<17)
 434 #define F_SERVER    (1u<<18)
 435 #define F_QUERY     (1u<<19)
 436 #define F_NOERR     (1u<<20)
 437 #define F_AUTH      (1u<<21)
 438 #define F_DNSSEC    (1u<<22)
 439 #define F_KEYTAG    (1u<<23)
 440 #define F_SECSTAT   (1u<<24)
 441 #define F_NO_RR     (1u<<25)
 442 #define F_IPSET     (1u<<26)
 443 #define F_NSIGMATCH (1u<<27)
 444
 445 /* Values of uid in crecs with F_CONFIG bit set. */
 446 #define SRC_INTERFACE 0
 447 #define SRC_CONFIG    1
 448 #define SRC_HOSTS     2
 449 #define SRC_AH        3
 450
 451
 452 /* struct sockaddr is not large enough to hold any address,
 453    and specifically not big enough to hold an IPv6 address.
 454    Blech. Roll our own. */
 455 union mysockaddr {
 456   struct sockaddr sa;
 457   struct sockaddr_in in;
 458 #if defined(HAVE_IPV6)
 459   struct sockaddr_in6 in6;
 460 #endif
 461 };
 462
 463 /* bits in flag param to IPv6 callbacks from iface_enumerate() */
 464 #define IFACE_TENTATIVE   1
 465 #define IFACE_DEPRECATED  2
 466 #define IFACE_PERMANENT   4
 467
 468
 469 #define SERV_FROM_RESOLV       1  /* 1 for servers from resolv, 0 for command line. */
 470 #define SERV_NO_ADDR           2  /* no server, this domain is local only */
 471 #define SERV_LITERAL_ADDRESS   4  /* addr is the answer, not the server */
 472 #define SERV_HAS_DOMAIN        8  /* server for one domain only */
 473 #define SERV_HAS_SOURCE       16  /* source address defined */
 474 #define SERV_FOR_NODOTS       32  /* server for names with no domain part only */
 475 #define SERV_WARNED_RECURSIVE 64  /* avoid warning spam */
 476 #define SERV_FROM_DBUS       128  /* 1 if source is DBus */
 477 #define SERV_MARK            256  /* for mark-and-delete */
 478 #define SERV_TYPE    (SERV_HAS_DOMAIN | SERV_FOR_NODOTS)
 479 #define SERV_COUNTED         512  /* workspace for log code */
 480 #define SERV_USE_RESOLV     1024  /* forward this domain in the normal way */
 481 #define SERV_NO_REBIND      2048  /* inhibit dns-rebind protection */
 482 #define SERV_FROM_FILE      4096  /* read from --servers-file */
 483 #define SERV_LOOP           8192  /* server causes forwarding loop */
 484
 485 struct serverfd {
 486   int fd;
 487   union mysockaddr source_addr;
 488   char interface[IF_NAMESIZE+1];
 489   struct serverfd *next;
 490 };
 491
 492 struct randfd {
 493   int fd;
 494   unsigned short refcount, family;
 495 };
 496
 497 struct server {
 498   union mysockaddr addr, source_addr;
 499   char interface[IF_NAMESIZE+1];
 500   struct serverfd *sfd;
 501   char *domain; /* set if this server only handles a domain. */
 502   int flags, tcpfd;
 503   unsigned int queries, failed_queries;
 504 #ifdef HAVE_LOOP
 505   u32 uid;
 506 #endif
 507   struct server *next;
 508 };
 509
 510 struct ipsets {
 511   char **sets;
 512   char *domain;
 513   struct ipsets *next;
 514 };
 515
 516 struct irec {
 517   union mysockaddr addr;
 518   struct in_addr netmask; /* only valid for IPv4 */
 519   int tftp_ok, dhcp_ok, mtu, done, warned, dad, dns_auth, index, multicast_done, found;
 520   char *name;
 521   struct irec *next;
 522 };
 523
 524 struct listener {
 525   int fd, tcpfd, tftpfd, family;
 526   struct irec *iface; /* only sometimes valid for non-wildcard */
 527   struct listener *next;
 528 };
 529
 530 /* interface and address parms from command line. */
 531 struct iname {
 532   char *name;
 533   union mysockaddr addr;
 534   int used;
 535   struct iname *next;
 536 };
 537
 538 /* resolv-file parms from command-line */
 539 struct resolvc {
 540   struct resolvc *next;
 541   int is_default, logged;
 542   time_t mtime;
 543   char *name;
 544 };
 545
 546 /* adn-hosts parms from command-line (also dhcp-hostsfile and dhcp-optsfile */
 547 #define AH_DIR      1
 548 #define AH_INACTIVE 2
 549 struct hostsfile {
 550   struct hostsfile *next;
 551   int flags;
 552   char *fname;
 553   unsigned int index; /* matches to cache entries for logging */
 554 };
 555
 556
 557 /* DNSSEC status values. */
 558 #define STAT_SECURE             1
 559 #define STAT_INSECURE           2
 560 #define STAT_BOGUS              3
 561 #define STAT_NEED_DS            4
 562 #define STAT_NEED_KEY           5
 563 #define STAT_TRUNCATED          6
 564 #define STAT_SECURE_WILDCARD    7
 565 #define STAT_NO_SIG             8
 566 #define STAT_NO_DS              9
 567 #define STAT_NEED_DS_NEG       10
 568 #define STAT_CHASE_CNAME       11
 569
 570 #define FREC_NOREBIND           1
 571 #define FREC_CHECKING_DISABLED  2
 572 #define FREC_HAS_SUBNET         4
 573 #define FREC_DNSKEY_QUERY       8
 574 #define FREC_DS_QUERY          16
 575 #define FREC_AD_QUESTION       32
 576 #define FREC_DO_QUESTION       64
 577 #define FREC_ADDED_PHEADER    128
 578 #define FREC_CHECK_NOSIGN     256
 579
 580 #ifdef HAVE_DNSSEC
 581 #define HASH_SIZE 20 /* SHA-1 digest size */
 582 #else
 583 #define HASH_SIZE sizeof(int)
 584 #endif
 585
 586 struct frec {
 587   union mysockaddr source;
 588   struct all_addr dest;
 589   struct server *sentto; /* NULL means free */
 590   struct randfd *rfd4;
 591 #ifdef HAVE_IPV6
 592   struct randfd *rfd6;
 593 #endif
 594   unsigned int iface;
 595   unsigned short orig_id, new_id;
 596   int fd, forwardall, flags;
 597   time_t time;
 598   unsigned char *hash[HASH_SIZE];
 599 #ifdef HAVE_DNSSEC
 600   int class, work_counter;
 601   struct blockdata *stash; /* Saved reply, whilst we validate */
 602   size_t stash_len;
 603   struct frec *dependent; /* Query awaiting internally-generated DNSKEY or DS query */
 604   struct frec *blocking_query; /* Query which is blocking us. */
 605 #endif
 606   struct frec *next;
 607 };
 608
 609 /* flags in top of length field for DHCP-option tables */
 610 #define OT_ADDR_LIST    0x8000
 611 #define OT_RFC1035_NAME 0x4000
 612 #define OT_INTERNAL     0x2000
 613 #define OT_NAME         0x1000
 614 #define OT_CSTRING      0x0800
 615 #define OT_DEC          0x0400
 616 #define OT_TIME         0x0200
 617
 618 /* actions in the daemon->helper RPC */
 619 #define ACTION_DEL           1
 620 #define ACTION_OLD_HOSTNAME  2
 621 #define ACTION_OLD           3
 622 #define ACTION_ADD           4
 623 #define ACTION_TFTP          5
 624
 625 #define LEASE_NEW            1  /* newly created */
 626 #define LEASE_CHANGED        2  /* modified */
 627 #define LEASE_AUX_CHANGED    4  /* CLID or expiry changed */
 628 #define LEASE_AUTH_NAME      8  /* hostname came from config, not from client */
 629 #define LEASE_USED          16  /* used this DHCPv6 transaction */
 630 #define LEASE_NA            32  /* IPv6 no-temporary lease */
 631 #define LEASE_TA            64  /* IPv6 temporary lease */
 632 #define LEASE_HAVE_HWADDR  128  /* Have set hwaddress */
 633
 634 struct dhcp_lease {
 635   int clid_len;          /* length of client identifier */
 636   unsigned char *clid;   /* clientid */
 637   char *hostname, *fqdn; /* name from client-hostname option or config */
 638   char *old_hostname;    /* hostname before it moved to another lease */
 639   int flags;
 640   time_t expires;        /* lease expiry */
 641 #ifdef HAVE_BROKEN_RTC
 642   unsigned int length;
 643 #endif
 644   int hwaddr_len, hwaddr_type;
 645   unsigned char hwaddr[DHCP_CHADDR_MAX];
 646   struct in_addr addr, override, giaddr;
 647   unsigned char *extradata;
 648   unsigned int extradata_len, extradata_size;
 649   int last_interface;
 650   int new_interface;     /* save possible originated interface */
 651   int new_prefixlen;     /* and its prefix length */
 652 #ifdef HAVE_DHCP6
 653   struct in6_addr addr6;
 654   int iaid;
 655   struct slaac_address {
 656     struct in6_addr addr;
 657     time_t ping_time;
 658     int backoff; /* zero -> confirmed */
 659     struct slaac_address *next;
 660   } *slaac_address;
 661   int vendorclass_count;
 662 #endif
 663   struct dhcp_lease *next;
 664 };
 665
 666 struct dhcp_netid {
 667   char *net;
 668   struct dhcp_netid *next;
 669 };
 670
 671 struct dhcp_netid_list {
 672   struct dhcp_netid *list;
 673   struct dhcp_netid_list *next;
 674 };
 675
 676 struct tag_if {
 677   struct dhcp_netid_list *set;
 678   struct dhcp_netid *tag;
 679   struct tag_if *next;
 680 };
 681
 682 struct hwaddr_config {
 683   int hwaddr_len, hwaddr_type;
 684   unsigned char hwaddr[DHCP_CHADDR_MAX];
 685   unsigned int wildcard_mask;
 686   struct hwaddr_config *next;
 687 };
 688
 689 struct dhcp_config {
 690   unsigned int flags;
 691   int clid_len;          /* length of client identifier */
 692   unsigned char *clid;   /* clientid */
 693   char *hostname, *domain;
 694   struct dhcp_netid_list *netid;
 695 #ifdef HAVE_DHCP6
 696   struct in6_addr addr6;
 697 #endif
 698   struct in_addr addr;
 699   time_t decline_time;
 700   unsigned int lease_time;
 701   struct hwaddr_config *hwaddr;
 702   struct dhcp_config *next;
 703 };
 704
 705 #define have_config(config, mask) ((config) && ((config)->flags & (mask)))
 706
 707 #define CONFIG_DISABLE           1
 708 #define CONFIG_CLID              2
 709 #define CONFIG_TIME              8
 710 #define CONFIG_NAME             16
 711 #define CONFIG_ADDR             32
 712 #define CONFIG_NOCLID          128
 713 #define CONFIG_FROM_ETHERS     256    /* entry created by /etc/ethers */
 714 #define CONFIG_ADDR_HOSTS      512    /* address added by from /etc/hosts */
 715 #define CONFIG_DECLINED       1024    /* address declined by client */
 716 #define CONFIG_BANK           2048    /* from dhcp hosts file */
 717 #define CONFIG_ADDR6          4096
 718 #define CONFIG_WILDCARD       8192
 719
 720 struct dhcp_opt {
 721   int opt, len, flags;
 722   union {
 723     int encap;
 724     unsigned int wildcard_mask;
 725     unsigned char *vendor_class;
 726   } u;
 727   unsigned char *val;
 728   struct dhcp_netid *netid;
 729   struct dhcp_opt *next;
 730 };
 731
 732 #define DHOPT_ADDR               1
 733 #define DHOPT_STRING             2
 734 #define DHOPT_ENCAPSULATE        4
 735 #define DHOPT_ENCAP_MATCH        8
 736 #define DHOPT_FORCE             16
 737 #define DHOPT_BANK              32
 738 #define DHOPT_ENCAP_DONE        64
 739 #define DHOPT_MATCH            128
 740 #define DHOPT_VENDOR           256
 741 #define DHOPT_HEX              512
 742 #define DHOPT_VENDOR_MATCH    1024
 743 #define DHOPT_RFC3925         2048
 744 #define DHOPT_TAGOK           4096
 745 #define DHOPT_ADDR6           8192
 746
 747 struct dhcp_boot {
 748   char *file, *sname, *tftp_sname;
 749   struct in_addr next_server;
 750   struct dhcp_netid *netid;
 751   struct dhcp_boot *next;
 752 };
 753
 754 struct pxe_service {
 755   unsigned short CSA, type;
 756   char *menu, *basename, *sname;
 757   struct in_addr server;
 758   struct dhcp_netid *netid;
 759   struct pxe_service *next;
 760 };
 761
 762 #define MATCH_VENDOR     1
 763 #define MATCH_USER       2
 764 #define MATCH_CIRCUIT    3
 765 #define MATCH_REMOTE     4
 766 #define MATCH_SUBSCRIBER 5
 767
 768 /* vendorclass, userclass, remote-id or cicuit-id */
 769 struct dhcp_vendor {
 770   int len, match_type;
 771   unsigned int enterprise;
 772   char *data;
 773   struct dhcp_netid netid;
 774   struct dhcp_vendor *next;
 775 };
 776
 777 struct dhcp_mac {
 778   unsigned int mask;
 779   int hwaddr_len, hwaddr_type;
 780   unsigned char hwaddr[DHCP_CHADDR_MAX];
 781   struct dhcp_netid netid;
 782   struct dhcp_mac *next;
 783 };
 784
 785 struct dhcp_bridge {
 786   char iface[IF_NAMESIZE];
 787   struct dhcp_bridge *alias, *next;
 788 };
 789
 790 struct cond_domain {
 791   char *domain, *prefix;
 792   struct in_addr start, end;
 793 #ifdef HAVE_IPV6
 794   struct in6_addr start6, end6;
 795 #endif
 796   int is6;
 797   struct cond_domain *next;
 798 };
 799
 800 #ifdef OPTION6_PREFIX_CLASS
 801 struct prefix_class {
 802   int class;
 803   struct dhcp_netid tag;
 804   struct prefix_class *next;
 805 };
 806 #endif
 807
 808 struct ra_interface {
 809   char *name;
 810   int interval, lifetime, prio;
 811   struct ra_interface *next;
 812 };
 813
 814 struct dhcp_context {
 815   unsigned int lease_time, addr_epoch;
 816   struct in_addr netmask, broadcast;
 817   struct in_addr local, router;
 818   struct in_addr start, end; /* range of available addresses */
 819 #ifdef HAVE_DHCP6
 820   struct in6_addr start6, end6; /* range of available addresses */
 821   struct in6_addr local6;
 822   int prefix, if_index;
 823   unsigned int valid, preferred, saved_valid;
 824   time_t ra_time, ra_short_period_start, address_lost_time;
 825   char *template_interface;
 826 #endif
 827   int flags;
 828   struct dhcp_netid netid, *filter;
 829   struct dhcp_context *next, *current;
 830 };
 831
 832 #define CONTEXT_STATIC         (1u<<0)
 833 #define CONTEXT_NETMASK        (1u<<1)
 834 #define CONTEXT_BRDCAST        (1u<<2)
 835 #define CONTEXT_PROXY          (1u<<3)
 836 #define CONTEXT_RA_ROUTER      (1u<<4)
 837 #define CONTEXT_RA_DONE        (1u<<5)
 838 #define CONTEXT_RA_NAME        (1u<<6)
 839 #define CONTEXT_RA_STATELESS   (1u<<7)
 840 #define CONTEXT_DHCP           (1u<<8)
 841 #define CONTEXT_DEPRECATE      (1u<<9)
 842 #define CONTEXT_TEMPLATE       (1u<<10)    /* create contexts using addresses */
 843 #define CONTEXT_CONSTRUCTED    (1u<<11)
 844 #define CONTEXT_GC             (1u<<12)
 845 #define CONTEXT_RA             (1u<<13)
 846 #define CONTEXT_CONF_USED      (1u<<14)
 847 #define CONTEXT_USED           (1u<<15)
 848 #define CONTEXT_OLD            (1u<<16)
 849 #define CONTEXT_V6             (1u<<17)
 850
 851 struct ping_result {
 852   struct in_addr addr;
 853   time_t time;
 854   unsigned int hash;
 855   struct ping_result *next;
 856 };
 857
 858 struct tftp_file {
 859   int refcount, fd;
 860   off_t size;
 861   dev_t dev;
 862   ino_t inode;
 863   char filename[];
 864 };
 865
 866 struct tftp_transfer {
 867   int sockfd;
 868   time_t timeout;
 869   int backoff;
 870   unsigned int block, blocksize, expansion;
 871   off_t offset;
 872   union mysockaddr peer;
 873   char opt_blocksize, opt_transize, netascii, carrylf;
 874   struct tftp_file *file;
 875   struct tftp_transfer *next;
 876 };
 877
 878 struct addr_list {
 879   struct in_addr addr;
 880   struct addr_list *next;
 881 };
 882
 883 struct tftp_prefix {
 884   char *interface;
 885   char *prefix;
 886   struct tftp_prefix *next;
 887 };
 888
 889 struct dhcp_relay {
 890   struct all_addr local, server;
 891   char *interface; /* Allowable interface for replies from server, and dest for IPv6 multicast */
 892   int iface_index; /* working - interface in which requests arrived, for return */
 893   struct dhcp_relay *current, *next;
 894 };
 895
 896 extern struct daemon {
 897   /* datastuctures representing the command-line and
 898      config file arguments. All set (including defaults)
 899      in option.c */
 900
 901   unsigned int options, options2;
 902   struct resolvc default_resolv, *resolv_files;
 903   time_t last_resolv;
 904   char *servers_file;
 905   struct mx_srv_record *mxnames;
 906   struct naptr *naptr;
 907   struct txt_record *txt, *rr;
 908   struct ptr_record *ptr;
 909   struct host_record *host_records, *host_records_tail;
 910   struct cname *cnames;
 911   struct auth_zone *auth_zones;
 912   struct interface_name *int_names;
 913   char *mxtarget;
 914   int addr4_netmask;
 915   int addr6_netmask;
 916   char *lease_file;
 917   char *username, *groupname, *scriptuser;
 918   char *luascript;
 919   char *authserver, *hostmaster;
 920   struct iname *authinterface;
 921   struct name_list *secondary_forward_server;
 922   int group_set, osport;
 923   char *domain_suffix;
 924   struct cond_domain *cond_domain, *synth_domains;
 925   char *runfile;
 926   char *lease_change_command;
 927   struct iname *if_names, *if_addrs, *if_except, *dhcp_except, *auth_peers, *tftp_interfaces;
 928   struct bogus_addr *bogus_addr;
 929   struct server *servers;
 930   struct ipsets *ipsets;
 931   int log_fac; /* log facility */
 932   char *log_file; /* optional log file */
 933   int max_logs;  /* queue limit */
 934   int cachesize, ftabsize;
 935   int port, query_port, min_port;
 936   unsigned long local_ttl, neg_ttl, max_ttl, max_cache_ttl, auth_ttl;
 937   struct hostsfile *addn_hosts;
 938   struct dhcp_context *dhcp, *dhcp6;
 939   struct ra_interface *ra_interfaces;
 940   struct dhcp_config *dhcp_conf;
 941   struct dhcp_opt *dhcp_opts, *dhcp_match, *dhcp_opts6, *dhcp_match6;
 942   struct dhcp_vendor *dhcp_vendors;
 943   struct dhcp_mac *dhcp_macs;
 944   struct dhcp_boot *boot_config;
 945   struct pxe_service *pxe_services;
 946   struct tag_if *tag_if;
 947   struct addr_list *override_relays;
 948   struct dhcp_relay *relay4, *relay6;
 949   int override;
 950   int enable_pxe;
 951   int doing_ra, doing_dhcp6;
 952   struct dhcp_netid_list *dhcp_ignore, *dhcp_ignore_names, *dhcp_gen_names;
 953   struct dhcp_netid_list *force_broadcast, *bootp_dynamic;
 954   struct hostsfile *dhcp_hosts_file, *dhcp_opts_file;
 955   int dhcp_max, tftp_max;
 956   int dhcp_server_port, dhcp_client_port;
 957   int start_tftp_port, end_tftp_port;
 958   unsigned int min_leasetime;
 959   struct doctor *doctors;
 960   unsigned short edns_pktsz;
 961   char *tftp_prefix;
 962   struct tftp_prefix *if_prefix; /* per-interface TFTP prefixes */
 963   unsigned int duid_enterprise, duid_config_len;
 964   unsigned char *duid_config;
 965   char *dbus_name;
 966   unsigned long soa_sn, soa_refresh, soa_retry, soa_expiry;
 967 #ifdef OPTION6_PREFIX_CLASS
 968   struct prefix_class *prefix_classes;
 969 #endif
 970 #ifdef HAVE_DNSSEC
 971   struct ds_config *ds;
 972 #endif
 973
 974   /* globally used stuff for DNS */
 975   char *packet; /* packet buffer */
 976   int packet_buff_sz; /* size of above */
 977   char *namebuff; /* MAXDNAME size buffer */
 978 #ifdef HAVE_DNSSEC
 979   char *keyname; /* MAXDNAME size buffer */
 980   char *workspacename; /* ditto */
 981 #endif
 982   unsigned int local_answer, queries_forwarded, auth_answer;
 983   struct frec *frec_list;
 984   struct serverfd *sfds;
 985   struct irec *interfaces;
 986   struct listener *listeners;
 987   struct server *last_server;
 988   time_t forwardtime;
 989   int forwardcount;
 990   struct server *srv_save; /* Used for resend on DoD */
 991   size_t packet_len;       /*      "        "        */
 992   struct randfd *rfd_save; /*      "        "        */
 993   pid_t tcp_pids[MAX_PROCS];
 994   struct randfd randomsocks[RANDOM_SOCKS];
 995   int v6pktinfo;
 996   struct addrlist *interface_addrs; /* list of all addresses/prefix lengths associated with all local interfaces */
 997
 998   /* DHCP state */
 999   int dhcpfd, helperfd, pxefd;
1000 #if defined(HAVE_LINUX_NETWORK)
1001   int netlinkfd;
1002 #elif defined(HAVE_BSD_NETWORK)
1003   int dhcp_raw_fd, dhcp_icmp_fd, routefd;
1004 #endif
1005   struct iovec dhcp_packet;
1006   char *dhcp_buff, *dhcp_buff2, *dhcp_buff3;
1007   struct ping_result *ping_results;
1008   FILE *lease_stream;
1009   struct dhcp_bridge *bridges;
1010 #ifdef HAVE_DHCP6
1011   int duid_len;
1012   unsigned char *duid;
1013   struct iovec outpacket;
1014   int dhcp6fd, icmp6fd;
1015 #endif
1016   /* DBus stuff */
1017   /* void * here to avoid depending on dbus headers outside dbus.c */
1018   void *dbus;
1019 #ifdef HAVE_DBUS
1020   struct watch *watches;
1021 #endif
1022
1023   /* TFTP stuff */
1024   struct tftp_transfer *tftp_trans, *tftp_done_trans;
1025
1026   /* utility string buffer, hold max sized IP address as string */
1027   char *addrbuff;
1028
1029 } *daemon;
1030
1031 /* cache.c */
1032 void cache_init(void);
1033 void log_query(unsigned int flags, char *name, struct all_addr *addr, char *arg);
1034 char *record_source(unsigned int index);
1035 char *querystr(char *desc, unsigned short type);
1036 struct crec *cache_find_by_addr(struct crec *crecp,
1037                                 struct all_addr *addr, time_t now,
1038                                 unsigned int prot);
1039 struct crec *cache_find_by_name(struct crec *crecp,
1040                                 char *name, time_t now, unsigned int prot);
1041 void cache_end_insert(void);
1042 void cache_start_insert(void);
1043 struct crec *cache_insert(char *name, struct all_addr *addr,
1044                           time_t now, unsigned long ttl, unsigned short flags);
1045 void cache_reload(void);
1046 void cache_add_dhcp_entry(char *host_name, int prot, struct all_addr *host_address, time_t ttd);
1047 struct in_addr a_record_from_hosts(char *name, time_t now);
1048 void cache_unhash_dhcp(void);
1049 void dump_cache(time_t now);
1050 int cache_make_stat(struct txt_record *t);
1051 char *cache_get_name(struct crec *crecp);
1052 char *cache_get_cname_target(struct crec *crecp);
1053 struct crec *cache_enumerate(int init);
1054
1055 /* blockdata.c */
1056 #ifdef HAVE_DNSSEC
1057 void blockdata_init(void);
1058 void blockdata_report(void);
1059 struct blockdata *blockdata_alloc(char *data, size_t len);
1060 void *blockdata_retrieve(struct blockdata *block, size_t len, void *data);
1061 void blockdata_free(struct blockdata *blocks);
1062 #endif
1063
1064 /* domain.c */
1065 char *get_domain(struct in_addr addr);
1066 #ifdef HAVE_IPV6
1067 char *get_domain6(struct in6_addr *addr);
1068 #endif
1069 int is_name_synthetic(int flags, char *name, struct all_addr *addr);
1070 int is_rev_synth(int flag, struct all_addr *addr, char *name);
1071
1072 /* rfc1035.c */
1073 int extract_name(struct dns_header *header, size_t plen, unsigned char **pp,
1074                  char *name, int isExtract, int extrabytes);
1075 unsigned char *skip_name(unsigned char *ansp, struct dns_header *header, size_t plen, int extrabytes);
1076 unsigned char *skip_questions(struct dns_header *header, size_t plen);
1077 unsigned char *skip_section(unsigned char *ansp, int count, struct dns_header *header, size_t plen);
1078 unsigned int extract_request(struct dns_header *header, size_t qlen,
1079                                char *name, unsigned short *typep);
1080 size_t setup_reply(struct dns_header *header, size_t  qlen,
1081                    struct all_addr *addrp, unsigned int flags,
1082                    unsigned long local_ttl);
1083 int extract_addresses(struct dns_header *header, size_t qlen, char *namebuff,
1084                       time_t now, char **ipsets, int is_sign, int checkrebind,
1085                       int no_cache, int secure, int *doctored);
1086 size_t answer_request(struct dns_header *header, char *limit, size_t qlen,
1087                       struct in_addr local_addr, struct in_addr local_netmask,
1088                       time_t now, int *ad_reqd, int *do_bit);
1089 int check_for_bogus_wildcard(struct dns_header *header, size_t qlen, char *name,
1090                              struct bogus_addr *addr, time_t now);
1091 unsigned char *find_pseudoheader(struct dns_header *header, size_t plen,
1092                                  size_t *len, unsigned char **p, int *is_sign);
1093 int check_for_local_domain(char *name, time_t now);
1094 unsigned int questions_crc(struct dns_header *header, size_t plen, char *buff);
1095 size_t resize_packet(struct dns_header *header, size_t plen,
1096                   unsigned char *pheader, size_t hlen);
1097 size_t add_mac(struct dns_header *header, size_t plen, char *limit, union mysockaddr *l3);
1098 size_t add_source_addr(struct dns_header *header, size_t plen, char *limit, union mysockaddr *source);
1099 #ifdef HAVE_DNSSEC
1100 size_t add_do_bit(struct dns_header *header, size_t plen, char *limit);
1101 #endif
1102 int check_source(struct dns_header *header, size_t plen, unsigned char *pseudoheader, union mysockaddr *peer);
1103 int add_resource_record(struct dns_header *header, char *limit, int *truncp,
1104                         int nameoffset, unsigned char **pp, unsigned long ttl,
1105                         int *offset, unsigned short type, unsigned short class, char *format, ...);
1106 unsigned char *skip_questions(struct dns_header *header, size_t plen);
1107 int extract_name(struct dns_header *header, size_t plen, unsigned char **pp,
1108                  char *name, int isExtract, int extrabytes);
1109 int in_arpa_name_2_addr(char *namein, struct all_addr *addrp);
1110 int private_net(struct in_addr addr, int ban_localhost);
1111
1112 /* auth.c */
1113 #ifdef HAVE_AUTH
1114 size_t answer_auth(struct dns_header *header, char *limit, size_t qlen,
1115                    time_t now, union mysockaddr *peer_addr, int local_query);
1116 int in_zone(struct auth_zone *zone, char *name, char **cut);
1117 #endif
1118
1119 /* dnssec.c */
1120 size_t dnssec_generate_query(struct dns_header *header, char *end, char *name, int class, int type, union mysockaddr *addr);
1121 int dnssec_validate_by_ds(time_t now, struct dns_header *header, size_t n, char *name, char *keyname, int class);
1122 int dnssec_validate_ds(time_t now, struct dns_header *header, size_t plen, char *name, char *keyname, int class);
1123 int dnssec_validate_reply(time_t now, struct dns_header *header, size_t plen, char *name, char *keyname, int *class, int *neganswer);
1124 int dnssec_chase_cname(time_t now, struct dns_header *header, size_t plen, char *name, char *keyname);
1125 int dnskey_keytag(int alg, int flags, unsigned char *rdata, int rdlen);
1126 size_t filter_rrsigs(struct dns_header *header, size_t plen);
1127 unsigned char* hash_questions(struct dns_header *header, size_t plen, char *name);
1128
1129 /* util.c */
1130 void rand_init(void);
1131 unsigned short rand16(void);
1132 u32 rand32(void);
1133 u64 rand64(void);
1134 int legal_hostname(char *c);
1135 char *canonicalise(char *s, int *nomem);
1136 unsigned char *do_rfc1035_name(unsigned char *p, char *sval);
1137 void *safe_malloc(size_t size);
1138 void safe_pipe(int *fd, int read_noblock);
1139 void *whine_malloc(size_t size);
1140 int sa_len(union mysockaddr *addr);
1141 int sockaddr_isequal(union mysockaddr *s1, union mysockaddr *s2);
1142 int hostname_isequal(const char *a, const char *b);
1143 time_t dnsmasq_time(void);
1144 int netmask_length(struct in_addr mask);
1145 int is_same_net(struct in_addr a, struct in_addr b, struct in_addr mask);
1146 #ifdef HAVE_IPV6
1147 int is_same_net6(struct in6_addr *a, struct in6_addr *b, int prefixlen);
1148 u64 addr6part(struct in6_addr *addr);
1149 void setaddr6part(struct in6_addr *addr, u64 host);
1150 #endif
1151 int retry_send(void);
1152 void prettyprint_time(char *buf, unsigned int t);
1153 int prettyprint_addr(union mysockaddr *addr, char *buf);
1154 int parse_hex(char *in, unsigned char *out, int maxlen,
1155               unsigned int *wildcard_mask, int *mac_type);
1156 int memcmp_masked(unsigned char *a, unsigned char *b, int len,
1157                   unsigned int mask);
1158 int expand_buf(struct iovec *iov, size_t size);
1159 char *print_mac(char *buff, unsigned char *mac, int len);
1160 void bump_maxfd(int fd, int *max);
1161 int read_write(int fd, unsigned char *packet, int size, int rw);
1162
1163 int wildcard_match(const char* wildcard, const char* match);
1164 int wildcard_matchn(const char* wildcard, const char* match, int num);
1165
1166 /* log.c */
1167 void die(char *message, char *arg1, int exit_code);
1168 int log_start(struct passwd *ent_pw, int errfd);
1169 int log_reopen(char *log_file);
1170 void my_syslog(int priority, const char *format, ...);
1171 void set_log_writer(fd_set *set, int *maxfdp);
1172 void check_log_writer(fd_set *set);
1173 void flush_log(void);
1174
1175 /* option.c */
1176 void read_opts (int argc, char **argv, char *compile_opts);
1177 char *option_string(int prot, unsigned int opt, unsigned char *val,
1178                     int opt_len, char *buf, int buf_len);
1179 void reread_dhcp(void);
1180 void read_servers_file(void);
1181 void set_option_bool(unsigned int opt);
1182 void reset_option_bool(unsigned int opt);
1183 struct hostsfile *expand_filelist(struct hostsfile *list);
1184 char *parse_server(char *arg, union mysockaddr *addr,
1185                    union mysockaddr *source_addr, char *interface, int *flags);
1186
1187 /* forward.c */
1188 void reply_query(int fd, int family, time_t now);
1189 void receive_query(struct listener *listen, time_t now);
1190 unsigned char *tcp_request(int confd, time_t now,
1191                            union mysockaddr *local_addr, struct in_addr netmask, int auth_dns);
1192 void server_gone(struct server *server);
1193 struct frec *get_new_frec(time_t now, int *wait, int force);
1194 int send_from(int fd, int nowild, char *packet, size_t len,
1195                union mysockaddr *to, struct all_addr *source,
1196                unsigned int iface);
1197 void resend_query();
1198 struct randfd *allocate_rfd(int family);
1199 void free_rfd(struct randfd *rfd);
1200
1201 /* network.c */
1202 int indextoname(int fd, int index, char *name);
1203 int local_bind(int fd, union mysockaddr *addr, char *intname, int is_tcp);
1204 int random_sock(int family);
1205 void pre_allocate_sfds(void);
1206 int reload_servers(char *fname);
1207 void mark_servers(int flag);
1208 void cleanup_servers(void);
1209 void add_update_server(int flags,
1210                        union mysockaddr *addr,
1211                        union mysockaddr *source_addr,
1212                        const char *interface,
1213                        const char *domain);
1214 void check_servers(void);
1215 int enumerate_interfaces(int reset);
1216 void create_wildcard_listeners(void);
1217 void create_bound_listeners(int die);
1218 void warn_bound_listeners(void);
1219 void warn_int_names(void);
1220 int is_dad_listeners(void);
1221 int iface_check(int family, struct all_addr *addr, char *name, int *auth_dns);
1222 int loopback_exception(int fd, int family, struct all_addr *addr, char *name);
1223 int label_exception(int index, int family, struct all_addr *addr);
1224 int fix_fd(int fd);
1225 int tcp_interface(int fd, int af);
1226 #ifdef HAVE_IPV6
1227 int set_ipv6pktinfo(int fd);
1228 #endif
1229 #ifdef HAVE_DHCP6
1230 void join_multicast(int dienow);
1231 #endif
1232 #if defined(HAVE_LINUX_NETWORK) || defined(HAVE_BSD_NETWORK)
1233 void newaddress(time_t now);
1234 #endif
1235
1236
1237 /* dhcp.c */
1238 #ifdef HAVE_DHCP
1239 void dhcp_init(void);
1240 void dhcp_packet(time_t now, int pxe_fd);
1241 struct dhcp_context *address_available(struct dhcp_context *context,
1242                                        struct in_addr addr,
1243                                        struct dhcp_netid *netids);
1244 struct dhcp_context *narrow_context(struct dhcp_context *context,
1245                                     struct in_addr taddr,
1246                                     struct dhcp_netid *netids);
1247 int address_allocate(struct dhcp_context *context,
1248                      struct in_addr *addrp, unsigned char *hwaddr, int hw_len,
1249                      struct dhcp_netid *netids, time_t now);
1250 void dhcp_read_ethers(void);
1251 struct dhcp_config *config_find_by_address(struct dhcp_config *configs, struct in_addr addr);
1252 char *host_from_dns(struct in_addr addr);
1253 #endif
1254
1255 /* lease.c */
1256 #ifdef HAVE_DHCP
1257 void lease_update_file(time_t now);
1258 void lease_update_dns(int force);
1259 void lease_init(time_t now);
1260 struct dhcp_lease *lease4_allocate(struct in_addr addr);
1261 #ifdef HAVE_DHCP6
1262 struct dhcp_lease *lease6_allocate(struct in6_addr *addrp, int lease_type);
1263 struct dhcp_lease *lease6_find(unsigned char *clid, int clid_len,
1264                                int lease_type, int iaid, struct in6_addr *addr);
1265 void lease6_reset(void);
1266 struct dhcp_lease *lease6_find_by_client(struct dhcp_lease *first, int lease_type, unsigned char *clid, int clid_len, int iaid);
1267 struct dhcp_lease *lease6_find_by_addr(struct in6_addr *net, int prefix, u64 addr);
1268 u64 lease_find_max_addr6(struct dhcp_context *context);
1269 void lease_ping_reply(struct in6_addr *sender, unsigned char *packet, char *interface);
1270 void lease_update_slaac(time_t now);
1271 void lease_set_iaid(struct dhcp_lease *lease, int iaid);
1272 void lease_make_duid(time_t now);
1273 #endif
1274 void lease_set_hwaddr(struct dhcp_lease *lease, unsigned char *hwaddr,
1275                       unsigned char *clid, int hw_len, int hw_type, int clid_len, time_t now, int force);
1276 void lease_set_hostname(struct dhcp_lease *lease, char *name, int auth, char *domain, char *config_domain);
1277 void lease_set_expires(struct dhcp_lease *lease, unsigned int len, time_t now);
1278 void lease_set_interface(struct dhcp_lease *lease, int interface, time_t now);
1279 struct dhcp_lease *lease_find_by_client(unsigned char *hwaddr, int hw_len, int hw_type,
1280                                         unsigned char *clid, int clid_len);
1281 struct dhcp_lease *lease_find_by_addr(struct in_addr addr);
1282 struct in_addr lease_find_max_addr(struct dhcp_context *context);
1283 void lease_prune(struct dhcp_lease *target, time_t now);
1284 void lease_update_from_configs(void);
1285 int do_script_run(time_t now);
1286 void rerun_scripts(void);
1287 void lease_find_interfaces(time_t now);
1288 #ifdef HAVE_SCRIPT
1289 void lease_add_extradata(struct dhcp_lease *lease, unsigned char *data,
1290                          unsigned int len, int delim);
1291 #endif
1292 #endif
1293
1294 /* rfc2131.c */
1295 #ifdef HAVE_DHCP
1296 size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
1297                   size_t sz, time_t now, int unicast_dest, int *is_inform, int pxe_fd, struct in_addr fallback);
1298 unsigned char *extended_hwaddr(int hwtype, int hwlen, unsigned char *hwaddr,
1299                                int clid_len, unsigned char *clid, int *len_out);
1300 #endif
1301
1302 /* dnsmasq.c */
1303 #ifdef HAVE_DHCP
1304 int make_icmp_sock(void);
1305 int icmp_ping(struct in_addr addr);
1306 #endif
1307 #ifdef HAVE_TOMATO
1308 void tomato_helper(time_t now);
1309 #endif
1310 #ifdef HAVE_LEASEFILE_EXPIRE //originally TOMATO option
1311 void flush_lease_file(time_t now);
1312 #endif
1313 void queue_event(int event);
1314 void send_alarm(time_t event, time_t now);
1315 void send_event(int fd, int event, int data, char *msg);
1316 void clear_cache_and_reload(time_t now);
1317
1318 /* netlink.c */
1319 #ifdef HAVE_LINUX_NETWORK
1320 void netlink_init(void);
1321 void netlink_multicast(void);
1322 #endif
1323
1324 /* bpf.c */
1325 #ifdef HAVE_BSD_NETWORK
1326 void init_bpf(void);
1327 void send_via_bpf(struct dhcp_packet *mess, size_t len,
1328                   struct in_addr iface_addr, struct ifreq *ifr);
1329 void route_init(void);
1330 void route_sock(time_t now);
1331 void route_sock(void);
1332 #endif
1333
1334 /* bpf.c or netlink.c */
1335 int iface_enumerate(int family, void *parm, int (callback)());
1336
1337 /* dbus.c */
1338 #ifdef HAVE_DBUS
1339 char *dbus_init(void);
1340 void check_dbus_listeners(fd_set *rset, fd_set *wset, fd_set *eset);
1341 void set_dbus_listeners(int *maxfdp, fd_set *rset, fd_set *wset, fd_set *eset);
1342 #  ifdef HAVE_DHCP
1343 void emit_dbus_signal(int action, struct dhcp_lease *lease, char *hostname);
1344 #  endif
1345 #endif
1346
1347 /* ipset.c */
1348 #ifdef HAVE_IPSET
1349 void ipset_init(void);
1350 int add_to_ipset(const char *setname, const struct all_addr *ipaddr, int flags, int remove);
1351 #endif
1352
1353 /* helper.c */
1354 #if defined(HAVE_SCRIPT)
1355 int create_helper(int event_fd, int err_fd, uid_t uid, gid_t gid, long max_fd);
1356 void helper_write(void);
1357 void queue_script(int action, struct dhcp_lease *lease,
1358                   char *hostname, time_t now);
1359 #ifdef HAVE_TFTP
1360 void queue_tftp(off_t file_len, char *filename, union mysockaddr *peer);
1361 #endif
1362 int helper_buf_empty(void);
1363 #endif
1364
1365 /* tftp.c */
1366 #ifdef HAVE_TFTP
1367 void tftp_request(struct listener *listen, time_t now);
1368 void check_tftp_listeners(fd_set *rset, time_t now);
1369 int do_tftp_script_run(void);
1370 #endif
1371
1372 /* conntrack.c */
1373 #ifdef HAVE_CONNTRACK
1374 int get_incoming_mark(union mysockaddr *peer_addr, struct all_addr *local_addr,
1375                       int istcp, unsigned int *markp);
1376 #endif
1377
1378 /* dhcp6.c */
1379 #ifdef HAVE_DHCP6
1380 void dhcp6_init(void);
1381 void dhcp6_packet(time_t now);
1382 struct dhcp_context *address6_allocate(struct dhcp_context *context,  unsigned char *clid, int clid_len, int temp_addr,
1383                                        int iaid, int serial, struct dhcp_netid *netids, int plain_range, struct in6_addr *ans);
1384 int config_valid(struct dhcp_config *config, struct dhcp_context *context, struct in6_addr *addr);
1385 struct dhcp_context *address6_available(struct dhcp_context *context,
1386                                         struct in6_addr *taddr,
1387                                         struct dhcp_netid *netids,
1388                                         int plain_range);
1389 struct dhcp_context *address6_valid(struct dhcp_context *context,
1390                                     struct in6_addr *taddr,
1391                                     struct dhcp_netid *netids,
1392                                     int plain_range);
1393 struct dhcp_config *config_find_by_address6(struct dhcp_config *configs, struct in6_addr *net,
1394                                             int prefix, u64 addr);
1395 void make_duid(time_t now);
1396 void dhcp_construct_contexts(time_t now);
1397 void get_client_mac(struct in6_addr *client, int iface, unsigned char *mac,
1398                     unsigned int *maclenp, unsigned int *mactypep);
1399 #endif
1400
1401 /* rfc3315.c */
1402 #ifdef HAVE_DHCP6
1403 unsigned short dhcp6_reply(struct dhcp_context *context, int interface, char *iface_name,
1404                            struct in6_addr *fallback, struct in6_addr *ll_addr, struct in6_addr *ula_addr,
1405                            size_t sz, struct in6_addr *client_addr, time_t now);
1406 void relay_upstream6(struct dhcp_relay *relay, ssize_t sz, struct in6_addr *peer_address, u32 scope_id);
1407
1408 unsigned short relay_reply6( struct sockaddr_in6 *peer, ssize_t sz, char *arrival_interface);
1409 #endif
1410
1411 /* dhcp-common.c */
1412 #ifdef HAVE_DHCP
1413 void dhcp_common_init(void);
1414 ssize_t recv_dhcp_packet(int fd, struct msghdr *msg);
1415 struct dhcp_netid *run_tag_if(struct dhcp_netid *input);
1416 struct dhcp_netid *option_filter(struct dhcp_netid *tags, struct dhcp_netid *context_tags,
1417                                  struct dhcp_opt *opts);
1418 int match_netid(struct dhcp_netid *check, struct dhcp_netid *pool, int negonly);
1419 char *strip_hostname(char *hostname);
1420 void log_tags(struct dhcp_netid *netid, u32 xid);
1421 int match_bytes(struct dhcp_opt *o, unsigned char *p, int len);
1422 void dhcp_update_configs(struct dhcp_config *configs);
1423 void display_opts(void);
1424 int lookup_dhcp_opt(int prot, char *name);
1425 int lookup_dhcp_len(int prot, int val);
1426 char *option_string(int prot, unsigned int opt, unsigned char *val,
1427                     int opt_len, char *buf, int buf_len);
1428 struct dhcp_config *find_config(struct dhcp_config *configs,
1429                                 struct dhcp_context *context,
1430                                 unsigned char *clid, int clid_len,
1431                                 unsigned char *hwaddr, int hw_len,
1432                                 int hw_type, char *hostname);
1433 int config_has_mac(struct dhcp_config *config, unsigned char *hwaddr, int len, int type);
1434 #ifdef HAVE_LINUX_NETWORK
1435 char *whichdevice(void);
1436 void bindtodevice(char *device, int fd);
1437 #endif
1438 #  ifdef HAVE_DHCP6
1439 void display_opts6(void);
1440 #  endif
1441 void log_context(int family, struct dhcp_context *context);
1442 void log_relay(int family, struct dhcp_relay *relay);
1443 #endif
1444
1445 /* outpacket.c */
1446 #ifdef HAVE_DHCP6
1447 void end_opt6(int container);
1448 int save_counter(int newval);
1449 void *expand(size_t headroom);
1450 int new_opt6(int opt);
1451 void *put_opt6(void *data, size_t len);
1452 void put_opt6_long(unsigned int val);
1453 void put_opt6_short(unsigned int val);
1454 void put_opt6_char(unsigned int val);
1455 void put_opt6_string(char *s);
1456 #endif
1457
1458 /* radv.c */
1459 #ifdef HAVE_DHCP6
1460 void ra_init(time_t now);
1461 void icmp6_packet(time_t now);
1462 time_t periodic_ra(time_t now);
1463 void ra_start_unsolicted(time_t now, struct dhcp_context *context);
1464 #endif
1465
1466 /* slaac.c */
1467 #ifdef HAVE_DHCP6
1468 void slaac_add_addrs(struct dhcp_lease *lease, time_t now, int force);
1469 time_t periodic_slaac(time_t now, struct dhcp_lease *leases);
1470 void slaac_ping_reply(struct in6_addr *sender, unsigned char *packet, char *interface, struct dhcp_lease *leases);
1471 #endif
1472
1473 /* loop.c */
1474 #ifdef HAVE_LOOP
1475 void loop_send_probes();
1476 int detect_loop(char *query, int type);
1477 #endif