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