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

   1 /* dnsmasq is Copyright (c) 2000-2013 Simon Kelley
   2
   3    This program is free software; you can redistribute it and/or modify
   4    it under the terms of the GNU General Public License as published by
   5    the Free Software Foundation; version 2 dated June, 1991, or
   6    (at your option) version 3 dated 29 June, 2007.
   7
   8    This program is distributed in the hope that it will be useful,
   9    but WITHOUT ANY WARRANTY; without even the implied warranty of
  10    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11    GNU General Public License for more details.
  12
  13    You should have received a copy of the GNU General Public License
  14    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15 */
  16
  17 #define COPYRIGHT "Copyright (c) 2000-2013 Simon Kelley"
  18
  19 #ifndef NO_LARGEFILE
  20 /* Ensure we can use files >2GB (log files may grow this big) */
  21 #  define _LARGEFILE_SOURCE 1
  22 #  define _FILE_OFFSET_BITS 64
  23 #endif
  24
  25 /* Get linux C library versions and define _GNU_SOURCE for kFreeBSD. */
  26 #if defined(__linux__) || defined(__GLIBC__)
  27 #  ifndef __ANDROID__
  28 #      define _GNU_SOURCE
  29 #  endif
  30 #  include <features.h>
  31 #endif
  32
  33 /* Need these defined early */
  34 #if defined(__sun) || defined(__sun__)
  35 #  define _XPG4_2
  36 #  define __EXTENSIONS__
  37 #endif
  38
  39 /* get these before config.h  for IPv6 stuff... */
  40 #include <sys/types.h>
  41 #include <sys/socket.h>
  42
  43 #ifdef __APPLE__
  44 /* Define before netinet/in.h to select API. OSX Lion onwards. */
  45 #  define __APPLE_USE_RFC_3542
  46 #endif
  47 #include <netinet/in.h>
  48
  49 /* Also needed before config.h. */
  50 #include <getopt.h>
  51
  52 #include "config.h"
  53
  54 typedef unsigned char u8;
  55 typedef unsigned short u16;
  56 typedef unsigned int u32;
  57 typedef unsigned long long u64;
  58
  59 #include "dns-protocol.h"
  60 #include "dhcp-protocol.h"
  61 #ifdef HAVE_DHCP6
  62 #include "dhcp6-protocol.h"
  63 #include "radv-protocol.h"
  64 #endif
  65
  66 #define gettext_noop(S) (S)
  67 #ifndef LOCALEDIR
  68 #  define _(S) (S)
  69 #else
  70 #  include <libintl.h>
  71 #  include <locale.h>
  72 #  define _(S) gettext(S)
  73 #endif
  74
  75 #include <arpa/inet.h>
  76 #include <sys/stat.h>
  77 #include <sys/ioctl.h>
  78 #if defined(HAVE_SOLARIS_NETWORK)
  79 #  include <sys/sockio.h>
  80 #endif
  81 #include <sys/select.h>
  82 #include <sys/wait.h>
  83 #include <sys/time.h>
  84 #include <sys/un.h>
  85 #include <limits.h>
  86 #include <net/if.h>
  87 #if defined(HAVE_SOLARIS_NETWORK) && !defined(ifr_mtu)
  88 /* Some solaris net/if./h omit this. */
  89 #  define ifr_mtu  ifr_ifru.ifru_metric
  90 #endif
  91 #include <unistd.h>
  92 #include <stdio.h>
  93 #include <string.h>
  94 #include <stdlib.h>
  95 #include <fcntl.h>
  96 #include <ctype.h>
  97 #include <signal.h>
  98 #include <stddef.h>
  99 #include <time.h>
 100 #include <errno.h>
 101 #include <pwd.h>
 102 #include <grp.h>
 103 #include <stdarg.h>
 104 #if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__sun__) || defined (__sun) || defined (__ANDROID__)
 105 #  include <netinet/if_ether.h>
 106 #else
 107 #  include <net/ethernet.h>
 108 #endif
 109 #include <net/if_arp.h>
 110 #include <netinet/in_systm.h>
 111 #include <netinet/ip.h>
 112 #include <netinet/ip_icmp.h>
 113 #include <sys/uio.h>
 114 #include <syslog.h>
 115 #include <dirent.h>
 116 #ifndef HAVE_LINUX_NETWORK
 117 #  include <net/if_dl.h>
 118 #endif
 119
 120 #if defined(HAVE_LINUX_NETWORK)
 121 #include <linux/capability.h>
 122 /* There doesn't seem to be a universally-available
 123    userpace header for these. */
 124 extern int capset(cap_user_header_t header, cap_user_data_t data);
 125 extern int capget(cap_user_header_t header, cap_user_data_t data);
 126 #define LINUX_CAPABILITY_VERSION_1  0x19980330
 127 #define LINUX_CAPABILITY_VERSION_2  0x20071026
 128 #define LINUX_CAPABILITY_VERSION_3  0x20080522
 129
 130 #include <sys/prctl.h>
 131 #elif defined(HAVE_SOLARIS_NETWORK)
 132 #include <priv.h>
 133 #endif
 134
 135 /* daemon is function in the C library.... */
 136 #define daemon dnsmasq_daemon
 137
 138 /* Async event queue */
 139 struct event_desc {
 140   int event, data, msg_sz;
 141 };
 142
 143 #define EVENT_RELOAD    1
 144 #define EVENT_DUMP      2
 145 #define EVENT_ALARM     3
 146 #define EVENT_TERM      4
 147 #define EVENT_CHILD     5
 148 #define EVENT_REOPEN    6
 149 #define EVENT_EXITED    7
 150 #define EVENT_KILLED    8
 151 #define EVENT_EXEC_ERR  9
 152 #define EVENT_PIPE_ERR  10
 153 #define EVENT_USER_ERR  11
 154 #define EVENT_CAP_ERR   12
 155 #define EVENT_PIDFILE   13
 156 #define EVENT_HUSER_ERR 14
 157 #define EVENT_GROUP_ERR 15
 158 #define EVENT_DIE       16
 159 #define EVENT_LOG_ERR   17
 160 #define EVENT_FORK_ERR  18
 161 #define EVENT_LUA_ERR   19
 162 #define EVENT_TFTP_ERR  20
 163
 164 /* Exit codes. */
 165 #define EC_GOOD        0
 166 #define EC_BADCONF     1
 167 #define EC_BADNET      2
 168 #define EC_FILE        3
 169 #define EC_NOMEM       4
 170 #define EC_MISC        5
 171 #define EC_INIT_OFFSET 10
 172
 173 /* Min buffer size: we check after adding each record, so there must be
 174    memory for the largest packet, and the largest record so the
 175    min for DNS is PACKETSZ+MAXDNAME+RRFIXEDSZ which is < 1000.
 176    This might be increased is EDNS packet size if greater than the minimum.
 177 */
 178 #define DNSMASQ_PACKETSZ PACKETSZ+MAXDNAME+RRFIXEDSZ
 179
 180 /* Trust the compiler dead-code eliminator.... */
 181 #define option_bool(x) (((x) < 32) ? daemon->options & (1u << (x)) : daemon->options2 & (1u << ((x) - 32)))
 182
 183 #define OPT_BOGUSPRIV      0
 184 #define OPT_FILTER         1
 185 #define OPT_LOG            2
 186 #define OPT_SELFMX         3
 187 #define OPT_NO_HOSTS       4
 188 #define OPT_NO_POLL        5
 189 #define OPT_DEBUG          6
 190 #define OPT_ORDER          7
 191 #define OPT_NO_RESOLV      8
 192 #define OPT_EXPAND         9
 193 #define OPT_LOCALMX        10
 194 #define OPT_NO_NEG         11
 195 #define OPT_NODOTS_LOCAL   12
 196 #define OPT_NOWILD         13
 197 #define OPT_ETHERS         14
 198 #define OPT_RESOLV_DOMAIN  15
 199 #define OPT_NO_FORK        16
 200 #define OPT_AUTHORITATIVE  17
 201 #define OPT_LOCALISE       18
 202 #define OPT_DBUS           19
 203 #define OPT_DHCP_FQDN      20
 204 #define OPT_NO_PING        21
 205 #define OPT_LEASE_RO       22
 206 #define OPT_ALL_SERVERS    23
 207 #define OPT_RELOAD         24
 208 #define OPT_LOCAL_REBIND   25
 209 #define OPT_TFTP_SECURE    26
 210 #define OPT_TFTP_NOBLOCK   27
 211 #define OPT_LOG_OPTS       28
 212 #define OPT_TFTP_APREF     29
 213 #define OPT_NO_OVERRIDE    30
 214 #define OPT_NO_REBIND      31
 215 #define OPT_ADD_MAC        32
 216 #define OPT_DNSSEC         33
 217 #define OPT_CONSEC_ADDR    34
 218 #define OPT_CONNTRACK      35
 219 #define OPT_FQDN_UPDATE    36
 220 #define OPT_RA             37
 221 #define OPT_TFTP_LC        38
 222 #define OPT_CLEVERBIND     39
 223 #define OPT_TFTP           40
 224 #define OPT_CLIENT_SUBNET  41
 225 #define OPT_QUIET_DHCP     42
 226 #define OPT_QUIET_DHCP6    43
 227 #define OPT_QUIET_RA       44
 228 #define OPT_LAST           45
 229
 230 /* extra flags for my_syslog, we use a couple of facilities since they are known
 231    not to occupy the same bits as priorities, no matter how syslog.h is set up. */
 232 #define MS_TFTP LOG_USER
 233 #define MS_DHCP LOG_DAEMON
 234
 235 struct all_addr {
 236   union {
 237     struct in_addr addr4;
 238 #ifdef HAVE_IPV6
 239     struct in6_addr addr6;
 240 #endif
 241   } addr;
 242 };
 243
 244 struct bogus_addr {
 245   struct in_addr addr;
 246   struct bogus_addr *next;
 247 };
 248
 249 /* dns doctor param */
 250 struct doctor {
 251   struct in_addr in, end, out, mask;
 252   struct doctor *next;
 253 };
 254
 255 struct mx_srv_record {
 256   char *name, *target;
 257   int issrv, srvport, priority, weight;
 258   unsigned int offset;
 259   struct mx_srv_record *next;
 260 };
 261
 262 struct naptr {
 263   char *name, *replace, *regexp, *services, *flags;
 264   unsigned int order, pref;
 265   struct naptr *next;
 266 };
 267
 268 struct txt_record {
 269   char *name;
 270   unsigned char *txt;
 271   unsigned short class, len;
 272   struct txt_record *next;
 273 };
 274
 275 struct ptr_record {
 276   char *name, *ptr;
 277   struct ptr_record *next;
 278 };
 279
 280 struct cname {
 281   char *alias, *target;
 282   struct cname *next;
 283 };
 284
 285 struct auth_zone {
 286   char *domain;
 287   struct subnet {
 288     int is6, prefixlen;
 289     struct in_addr addr4;
 290 #ifdef HAVE_IPV6
 291     struct in6_addr addr6;
 292 #endif
 293     struct subnet *next;
 294   } *subnet;
 295   struct auth_zone *next;
 296 };
 297
 298
 299 struct host_record {
 300   struct name_list {
 301     char *name;
 302     struct name_list *next;
 303   } *names;
 304   struct in_addr addr;
 305 #ifdef HAVE_IPV6
 306   struct in6_addr addr6;
 307 #endif
 308   struct host_record *next;
 309 };
 310
 311 struct interface_name {
 312   char *name; /* domain name */
 313   char *intr; /* interface name */
 314   struct addrlist {
 315     struct all_addr addr;
 316     struct addrlist *next;
 317   } *addr4;
 318 #ifdef HAVE_IPV6
 319   struct addrlist *addr6;
 320 #endif
 321   struct interface_name *next;
 322 };
 323
 324 union bigname {
 325   char name[MAXDNAME];
 326   union bigname *next; /* freelist */
 327 };
 328
 329 struct keydata {
 330   struct keydata *next;
 331   unsigned char key[KEYBLOCK_LEN];
 332 };
 333
 334 struct crec {
 335   struct crec *next, *prev, *hash_next;
 336   /* union is 16 bytes when doing IPv6, 8 bytes on 32 bit machines without IPv6 */
 337   union {
 338     struct all_addr addr;
 339     struct {
 340       union {
 341         struct crec *cache;
 342         struct interface_name *int_name;
 343       } target;
 344       int uid; /* -1 if union is interface-name */
 345     } cname;
 346     struct {
 347       struct keydata *keydata;
 348       unsigned char algo;
 349       unsigned char digest; /* DS only */
 350       unsigned short flags_or_keyid; /* flags for DNSKEY, keyid for DS */
 351     } key;
 352   } addr;
 353   time_t ttd; /* time to die */
 354   /* used as keylen if F_DS or F_DNSKEY, index to source for F_HOSTS */
 355   int uid;
 356   unsigned short flags;
 357   union {
 358     char sname[SMALLDNAME];
 359     union bigname *bname;
 360     char *namep;
 361   } name;
 362 };
 363
 364 #define F_IMMORTAL  (1u<<0)
 365 #define F_NAMEP     (1u<<1)
 366 #define F_REVERSE   (1u<<2)
 367 #define F_FORWARD   (1u<<3)
 368 #define F_DHCP      (1u<<4)
 369 #define F_NEG       (1u<<5)
 370 #define F_HOSTS     (1u<<6)
 371 #define F_IPV4      (1u<<7)
 372 #define F_IPV6      (1u<<8)
 373 #define F_BIGNAME   (1u<<9)
 374 #define F_NXDOMAIN  (1u<<10)
 375 #define F_CNAME     (1u<<11)
 376 #define F_DNSKEY    (1u<<12)
 377 #define F_CONFIG    (1u<<13)
 378 #define F_DS        (1u<<14)
 379 #define F_DNSSECOK  (1u<<15)
 380
 381 /* below here are only valid as args to log_query: cache
 382    entries are limited to 16 bits */
 383 #define F_UPSTREAM  (1u<<16)
 384 #define F_RRNAME    (1u<<17)
 385 #define F_SERVER    (1u<<18)
 386 #define F_QUERY     (1u<<19)
 387 #define F_NOERR     (1u<<20)
 388 #define F_AUTH      (1u<<21)
 389
 390 /* composites */
 391 #define F_TYPE      (F_IPV4 | F_IPV6 | F_DNSKEY | F_DS) /* Only one may be set */
 392
 393
 394
 395 /* struct sockaddr is not large enough to hold any address,
 396    and specifically not big enough to hold an IPv6 address.
 397    Blech. Roll our own. */
 398 union mysockaddr {
 399   struct sockaddr sa;
 400   struct sockaddr_in in;
 401 #if defined(HAVE_IPV6)
 402   struct sockaddr_in6 in6;
 403 #endif
 404 };
 405
 406 /* bits in flag param to IPv6 callbacks from iface_enumerate() */
 407 #define IFACE_TENTATIVE   1
 408 #define IFACE_DEPRECATED  2
 409 #define IFACE_PERMANENT   4
 410
 411
 412 #define SERV_FROM_RESOLV       1  /* 1 for servers from resolv, 0 for command line. */
 413 #define SERV_NO_ADDR           2  /* no server, this domain is local only */
 414 #define SERV_LITERAL_ADDRESS   4  /* addr is the answer, not the server */
 415 #define SERV_HAS_DOMAIN        8  /* server for one domain only */
 416 #define SERV_HAS_SOURCE       16  /* source address defined */
 417 #define SERV_FOR_NODOTS       32  /* server for names with no domain part only */
 418 #define SERV_WARNED_RECURSIVE 64  /* avoid warning spam */
 419 #define SERV_FROM_DBUS       128  /* 1 if source is DBus */
 420 #define SERV_MARK            256  /* for mark-and-delete */
 421 #define SERV_TYPE    (SERV_HAS_DOMAIN | SERV_FOR_NODOTS)
 422 #define SERV_COUNTED         512  /* workspace for log code */
 423 #define SERV_USE_RESOLV     1024  /* forward this domain in the normal way */
 424 #define SERV_NO_REBIND      2048  /* inhibit dns-rebind protection */
 425
 426 struct serverfd {
 427   int fd;
 428   union mysockaddr source_addr;
 429   char interface[IF_NAMESIZE+1];
 430   struct serverfd *next;
 431 };
 432
 433 struct randfd {
 434   int fd;
 435   unsigned short refcount, family;
 436 };
 437
 438 struct server {
 439   union mysockaddr addr, source_addr;
 440   char interface[IF_NAMESIZE+1];
 441   struct serverfd *sfd;
 442   char *domain; /* set if this server only handles a domain. */
 443   int flags, tcpfd;
 444   unsigned int queries, failed_queries;
 445   struct server *next;
 446 };
 447
 448 struct ipsets {
 449   char **sets;
 450   char *domain;
 451   struct ipsets *next;
 452 };
 453
 454 struct irec {
 455   union mysockaddr addr;
 456   struct in_addr netmask; /* only valid for IPv4 */
 457   int tftp_ok, dhcp_ok, mtu, done, warned, dad, dns_auth, index, multicast_done;
 458   char *name;
 459   struct irec *next;
 460 };
 461
 462 struct listener {
 463   int fd, tcpfd, tftpfd, family;
 464   struct irec *iface; /* only sometimes valid for non-wildcard */
 465   struct listener *next;
 466 };
 467
 468 /* interface and address parms from command line. */
 469 struct iname {
 470   char *name;
 471   union mysockaddr addr;
 472   int used;
 473   struct iname *next;
 474 };
 475
 476 /* resolv-file parms from command-line */
 477 struct resolvc {
 478   struct resolvc *next;
 479   int is_default, logged;
 480   time_t mtime;
 481   char *name;
 482 };
 483
 484 /* adn-hosts parms from command-line (also dhcp-hostsfile and dhcp-optsfile */
 485 #define AH_DIR      1
 486 #define AH_INACTIVE 2
 487 struct hostsfile {
 488   struct hostsfile *next;
 489   int flags;
 490   char *fname;
 491   int index; /* matches to cache entries for logging */
 492 };
 493
 494 #define FREC_NOREBIND           1
 495 #define FREC_CHECKING_DISABLED  2
 496 #define FREC_HAS_SUBNET         4
 497
 498 struct frec {
 499   union mysockaddr source;
 500   struct all_addr dest;
 501   struct server *sentto; /* NULL means free */
 502   struct randfd *rfd4;
 503 #ifdef HAVE_IPV6
 504   struct randfd *rfd6;
 505 #endif
 506   unsigned int iface;
 507   unsigned short orig_id, new_id;
 508   int fd, forwardall, flags;
 509   unsigned int crc;
 510   time_t time;
 511   struct frec *next;
 512 };
 513
 514 /* flags in top of length field for DHCP-option tables */
 515 #define OT_ADDR_LIST    0x8000
 516 #define OT_RFC1035_NAME 0x4000
 517 #define OT_INTERNAL     0x2000
 518 #define OT_NAME         0x1000
 519 #define OT_CSTRING      0x0800
 520 #define OT_DEC          0x0400
 521 #define OT_TIME         0x0200
 522
 523 /* actions in the daemon->helper RPC */
 524 #define ACTION_DEL           1
 525 #define ACTION_OLD_HOSTNAME  2
 526 #define ACTION_OLD           3
 527 #define ACTION_ADD           4
 528 #define ACTION_TFTP          5
 529
 530 #define LEASE_NEW            1  /* newly created */
 531 #define LEASE_CHANGED        2  /* modified */
 532 #define LEASE_AUX_CHANGED    4  /* CLID or expiry changed */
 533 #define LEASE_AUTH_NAME      8  /* hostname came from config, not from client */
 534 #define LEASE_USED          16  /* used this DHCPv6 transaction */
 535 #define LEASE_NA            32  /* IPv6 no-temporary lease */
 536 #define LEASE_TA            64  /* IPv6 temporary lease */
 537 #define LEASE_HAVE_HWADDR  128  /* Have set hwaddress */
 538
 539 struct dhcp_lease {
 540   int clid_len;          /* length of client identifier */
 541   unsigned char *clid;   /* clientid */
 542   char *hostname, *fqdn; /* name from client-hostname option or config */
 543   char *old_hostname;    /* hostname before it moved to another lease */
 544   int flags;
 545   time_t expires;        /* lease expiry */
 546 #ifdef HAVE_BROKEN_RTC
 547   unsigned int length;
 548 #endif
 549   int hwaddr_len, hwaddr_type;
 550   unsigned char hwaddr[DHCP_CHADDR_MAX];
 551   struct in_addr addr, override, giaddr;
 552   unsigned char *extradata;
 553   unsigned int extradata_len, extradata_size;
 554   int last_interface;
 555 #ifdef HAVE_DHCP6
 556   struct in6_addr addr6;
 557   int iaid;
 558   struct slaac_address {
 559     struct in6_addr addr, local;
 560     time_t ping_time;
 561     int backoff; /* zero -> confirmed */
 562     struct slaac_address *next;
 563   } *slaac_address;
 564   int vendorclass_count;
 565 #endif
 566   struct dhcp_lease *next;
 567 };
 568
 569 struct dhcp_netid {
 570   char *net;
 571   struct dhcp_netid *next;
 572 };
 573
 574 struct dhcp_netid_list {
 575   struct dhcp_netid *list;
 576   struct dhcp_netid_list *next;
 577 };
 578
 579 struct tag_if {
 580   struct dhcp_netid_list *set;
 581   struct dhcp_netid *tag;
 582   struct tag_if *next;
 583 };
 584
 585 struct hwaddr_config {
 586   int hwaddr_len, hwaddr_type;
 587   unsigned char hwaddr[DHCP_CHADDR_MAX];
 588   unsigned int wildcard_mask;
 589   struct hwaddr_config *next;
 590 };
 591
 592 struct dhcp_config {
 593   unsigned int flags;
 594   int clid_len;          /* length of client identifier */
 595   unsigned char *clid;   /* clientid */
 596   char *hostname, *domain;
 597   struct dhcp_netid_list *netid;
 598 #ifdef HAVE_DHCP6
 599   struct in6_addr addr6;
 600 #endif
 601   struct in_addr addr;
 602   time_t decline_time;
 603   unsigned int lease_time;
 604   struct hwaddr_config *hwaddr;
 605   struct dhcp_config *next;
 606 };
 607
 608 #define have_config(config, mask) ((config) && ((config)->flags & (mask)))
 609
 610 #define CONFIG_DISABLE           1
 611 #define CONFIG_CLID              2
 612 #define CONFIG_TIME              8
 613 #define CONFIG_NAME             16
 614 #define CONFIG_ADDR             32
 615 #define CONFIG_NOCLID          128
 616 #define CONFIG_FROM_ETHERS     256    /* entry created by /etc/ethers */
 617 #define CONFIG_ADDR_HOSTS      512    /* address added by from /etc/hosts */
 618 #define CONFIG_DECLINED       1024    /* address declined by client */
 619 #define CONFIG_BANK           2048    /* from dhcp hosts file */
 620 #define CONFIG_ADDR6          4096
 621 #define CONFIG_WILDCARD       8192
 622
 623 struct dhcp_opt {
 624   int opt, len, flags;
 625   union {
 626     int encap;
 627     unsigned int wildcard_mask;
 628     unsigned char *vendor_class;
 629   } u;
 630   unsigned char *val;
 631   struct dhcp_netid *netid;
 632   struct dhcp_opt *next;
 633 };
 634
 635 #define DHOPT_ADDR               1
 636 #define DHOPT_STRING             2
 637 #define DHOPT_ENCAPSULATE        4
 638 #define DHOPT_ENCAP_MATCH        8
 639 #define DHOPT_FORCE             16
 640 #define DHOPT_BANK              32
 641 #define DHOPT_ENCAP_DONE        64
 642 #define DHOPT_MATCH            128
 643 #define DHOPT_VENDOR           256
 644 #define DHOPT_HEX              512
 645 #define DHOPT_VENDOR_MATCH    1024
 646 #define DHOPT_RFC3925         2048
 647 #define DHOPT_TAGOK           4096
 648 #define DHOPT_ADDR6           8192
 649
 650 struct dhcp_boot {
 651   char *file, *sname, *tftp_sname;
 652   struct in_addr next_server;
 653   struct dhcp_netid *netid;
 654   struct dhcp_boot *next;
 655 };
 656
 657 struct pxe_service {
 658   unsigned short CSA, type;
 659   char *menu, *basename, *sname;
 660   struct in_addr server;
 661   struct dhcp_netid *netid;
 662   struct pxe_service *next;
 663 };
 664
 665 #define MATCH_VENDOR     1
 666 #define MATCH_USER       2
 667 #define MATCH_CIRCUIT    3
 668 #define MATCH_REMOTE     4
 669 #define MATCH_SUBSCRIBER 5
 670
 671 /* vendorclass, userclass, remote-id or cicuit-id */
 672 struct dhcp_vendor {
 673   int len, match_type;
 674   unsigned int enterprise;
 675   char *data;
 676   struct dhcp_netid netid;
 677   struct dhcp_vendor *next;
 678 };
 679
 680 struct dhcp_mac {
 681   unsigned int mask;
 682   int hwaddr_len, hwaddr_type;
 683   unsigned char hwaddr[DHCP_CHADDR_MAX];
 684   struct dhcp_netid netid;
 685   struct dhcp_mac *next;
 686 };
 687
 688 struct dhcp_bridge {
 689   char iface[IF_NAMESIZE];
 690   struct dhcp_bridge *alias, *next;
 691 };
 692
 693 struct cond_domain {
 694   char *domain, *prefix;
 695   struct in_addr start, end;
 696 #ifdef HAVE_IPV6
 697   struct in6_addr start6, end6;
 698 #endif
 699   int is6;
 700   struct cond_domain *next;
 701 };
 702
 703 #ifdef OPTION6_PREFIX_CLASS
 704 struct prefix_class {
 705   int class;
 706   struct dhcp_netid tag;
 707   struct prefix_class *next;
 708 };
 709 #endif
 710
 711 struct ra_interface {
 712   char *name;
 713   int interval, lifetime, prio;
 714   struct ra_interface *next;
 715 };
 716
 717 struct dhcp_context {
 718   unsigned int lease_time, addr_epoch;
 719   struct in_addr netmask, broadcast;
 720   struct in_addr local, router;
 721   struct in_addr start, end; /* range of available addresses */
 722 #ifdef HAVE_DHCP6
 723   struct in6_addr start6, end6; /* range of available addresses */
 724   struct in6_addr local6;
 725   int prefix, if_index;
 726   unsigned int valid, preferred, saved_valid;
 727   time_t ra_time, ra_short_period_start, address_lost_time;
 728   char *template_interface;
 729 #endif
 730   int flags;
 731   struct dhcp_netid netid, *filter;
 732   struct dhcp_context *next, *current;
 733 };
 734
 735 #define CONTEXT_STATIC         (1u<<0)
 736 #define CONTEXT_NETMASK        (1u<<1)
 737 #define CONTEXT_BRDCAST        (1u<<2)
 738 #define CONTEXT_PROXY          (1u<<3)
 739 #define CONTEXT_RA_ONLY        (1u<<4)
 740 #define CONTEXT_RA_DONE        (1u<<5)
 741 #define CONTEXT_RA_NAME        (1u<<6)
 742 #define CONTEXT_RA_STATELESS   (1u<<7)
 743 #define CONTEXT_DHCP           (1u<<8)
 744 #define CONTEXT_DEPRECATE      (1u<<9)
 745 #define CONTEXT_TEMPLATE       (1u<<10)    /* create contexts using addresses */
 746 #define CONTEXT_CONSTRUCTED    (1u<<11)
 747 #define CONTEXT_GC             (1u<<12)
 748 #define CONTEXT_RA             (1u<<13)
 749 #define CONTEXT_CONF_USED      (1u<<14)
 750 #define CONTEXT_USED           (1u<<15)
 751 #define CONTEXT_NOAUTH         (1u<<16)
 752 #define CONTEXT_OLD            (1u<<17)
 753 #define CONTEXT_V6             (1u<<18)
 754
 755
 756 struct ping_result {
 757   struct in_addr addr;
 758   time_t time;
 759   unsigned int hash;
 760   struct ping_result *next;
 761 };
 762
 763 struct tftp_file {
 764   int refcount, fd;
 765   off_t size;
 766   dev_t dev;
 767   ino_t inode;
 768   char filename[];
 769 };
 770
 771 struct tftp_transfer {
 772   int sockfd;
 773   time_t timeout;
 774   int backoff;
 775   unsigned int block, blocksize, expansion;
 776   off_t offset;
 777   union mysockaddr peer;
 778   char opt_blocksize, opt_transize, netascii, carrylf;
 779   struct tftp_file *file;
 780   struct tftp_transfer *next;
 781 };
 782
 783 struct addr_list {
 784   struct in_addr addr;
 785   struct addr_list *next;
 786 };
 787
 788 struct tftp_prefix {
 789   char *interface;
 790   char *prefix;
 791   struct tftp_prefix *next;
 792 };
 793
 794 struct dhcp_relay {
 795   struct all_addr local, server;
 796   char *interface; /* Allowable interface for replies from server, and dest for IPv6 multicast */
 797   int iface_index; /* working - interface in which requests arrived, for return */
 798   struct dhcp_relay *current, *next;
 799 };
 800
 801 extern struct daemon {
 802   /* datastuctures representing the command-line and
 803      config file arguments. All set (including defaults)
 804      in option.c */
 805
 806   unsigned int options, options2;
 807   struct resolvc default_resolv, *resolv_files;
 808   time_t last_resolv;
 809   struct mx_srv_record *mxnames;
 810   struct naptr *naptr;
 811   struct txt_record *txt, *rr;
 812   struct ptr_record *ptr;
 813   struct host_record *host_records, *host_records_tail;
 814   struct cname *cnames;
 815   struct auth_zone *auth_zones;
 816   struct interface_name *int_names;
 817   char *mxtarget;
 818   int addr4_netmask;
 819   int addr6_netmask;
 820   char *lease_file;
 821   char *username, *groupname, *scriptuser;
 822   char *luascript;
 823   char *authserver, *hostmaster;
 824   struct iname *authinterface;
 825   struct name_list *secondary_forward_server;
 826   int group_set, osport;
 827   char *domain_suffix;
 828   struct cond_domain *cond_domain, *synth_domains;
 829   char *runfile;
 830   char *lease_change_command;
 831   struct iname *if_names, *if_addrs, *if_except, *dhcp_except, *auth_peers, *tftp_interfaces;
 832   struct bogus_addr *bogus_addr;
 833   struct server *servers;
 834   struct ipsets *ipsets;
 835   int log_fac; /* log facility */
 836   char *log_file; /* optional log file */
 837   int max_logs;  /* queue limit */
 838   int cachesize, ftabsize;
 839   int port, query_port, min_port;
 840   unsigned long local_ttl, neg_ttl, max_ttl, max_cache_ttl, auth_ttl;
 841   struct hostsfile *addn_hosts;
 842   struct dhcp_context *dhcp, *dhcp6;
 843   struct ra_interface *ra_interfaces;
 844   struct dhcp_config *dhcp_conf;
 845   struct dhcp_opt *dhcp_opts, *dhcp_match, *dhcp_opts6, *dhcp_match6;
 846   struct dhcp_vendor *dhcp_vendors;
 847   struct dhcp_mac *dhcp_macs;
 848   struct dhcp_boot *boot_config;
 849   struct pxe_service *pxe_services;
 850   struct tag_if *tag_if;
 851   struct addr_list *override_relays;
 852   struct dhcp_relay *relay4, *relay6;
 853   int override;
 854   int enable_pxe;
 855   int doing_ra, doing_dhcp6;
 856   struct dhcp_netid_list *dhcp_ignore, *dhcp_ignore_names, *dhcp_gen_names;
 857   struct dhcp_netid_list *force_broadcast, *bootp_dynamic;
 858   struct hostsfile *dhcp_hosts_file, *dhcp_opts_file;
 859   int dhcp_max, tftp_max;
 860   int dhcp_server_port, dhcp_client_port;
 861   int start_tftp_port, end_tftp_port;
 862   unsigned int min_leasetime;
 863   struct doctor *doctors;
 864   unsigned short edns_pktsz;
 865   char *tftp_prefix;
 866   struct tftp_prefix *if_prefix; /* per-interface TFTP prefixes */
 867   unsigned int duid_enterprise, duid_config_len;
 868   unsigned char *duid_config;
 869   char *dbus_name;
 870   unsigned long soa_sn, soa_refresh, soa_retry, soa_expiry;
 871 #ifdef OPTION6_PREFIX_CLASS
 872   struct prefix_class *prefix_classes;
 873 #endif
 874
 875   /* globally used stuff for DNS */
 876   char *packet; /* packet buffer */
 877   int packet_buff_sz; /* size of above */
 878   char *namebuff; /* MAXDNAME size buffer */
 879   unsigned int local_answer, queries_forwarded, auth_answer;
 880   struct frec *frec_list;
 881   struct serverfd *sfds;
 882   struct irec *interfaces;
 883   struct listener *listeners;
 884   struct server *last_server;
 885   time_t forwardtime;
 886   int forwardcount;
 887   struct server *srv_save; /* Used for resend on DoD */
 888   size_t packet_len;       /*      "        "        */
 889   struct randfd *rfd_save; /*      "        "        */
 890   pid_t tcp_pids[MAX_PROCS];
 891   struct randfd randomsocks[RANDOM_SOCKS];
 892   int v6pktinfo;
 893
 894   /* DHCP state */
 895   int dhcpfd, helperfd, pxefd;
 896 #if defined(HAVE_LINUX_NETWORK)
 897   int netlinkfd;
 898 #elif defined(HAVE_BSD_NETWORK)
 899   int dhcp_raw_fd, dhcp_icmp_fd;
 900 #endif
 901   struct iovec dhcp_packet;
 902   char *dhcp_buff, *dhcp_buff2, *dhcp_buff3;
 903   struct ping_result *ping_results;
 904   FILE *lease_stream;
 905   struct dhcp_bridge *bridges;
 906 #ifdef HAVE_DHCP6
 907   int duid_len;
 908   unsigned char *duid;
 909   struct iovec outpacket;
 910   int dhcp6fd, icmp6fd;
 911 #endif
 912   /* DBus stuff */
 913   /* void * here to avoid depending on dbus headers outside dbus.c */
 914   void *dbus;
 915 #ifdef HAVE_DBUS
 916   struct watch *watches;
 917 #endif
 918
 919   /* TFTP stuff */
 920   struct tftp_transfer *tftp_trans, *tftp_done_trans;
 921
 922   /* utility string buffer, hold max sized IP address as string */
 923   char *addrbuff;
 924
 925 } *daemon;
 926
 927 /* cache.c */
 928 void cache_init(void);
 929 void log_query(unsigned int flags, char *name, struct all_addr *addr, char *arg);
 930 char *record_source(int index);
 931 void querystr(char *desc, char *str, unsigned short type);
 932 struct crec *cache_find_by_addr(struct crec *crecp,
 933                                 struct all_addr *addr, time_t now,
 934                                 unsigned short prot);
 935 struct crec *cache_find_by_name(struct crec *crecp,
 936                                 char *name, time_t now, unsigned short  prot);
 937 void cache_end_insert(void);
 938 void cache_start_insert(void);
 939 struct crec *cache_insert(char *name, struct all_addr *addr,
 940                           time_t now, unsigned long ttl, unsigned short flags);
 941 void cache_reload(void);
 942 void cache_add_dhcp_entry(char *host_name, int prot, struct all_addr *host_address, time_t ttd);
 943 struct in_addr a_record_from_hosts(char *name, time_t now);
 944 void cache_unhash_dhcp(void);
 945 void dump_cache(time_t now);
 946 char *cache_get_name(struct crec *crecp);
 947 char *cache_get_cname_target(struct crec *crecp);
 948 struct crec *cache_enumerate(int init);
 949 #ifdef HAVE_DNSSEC
 950 struct keydata *keydata_alloc(char *data, size_t len);
 951 void keydata_free(struct keydata *blocks);
 952 #endif
 953
 954 /* domain.c */
 955 char *get_domain(struct in_addr addr);
 956 #ifdef HAVE_IPV6
 957 char *get_domain6(struct in6_addr *addr);
 958 #endif
 959 int is_name_synthetic(int flags, char *name, struct all_addr *addr);
 960 int is_rev_synth(int flag, struct all_addr *addr, char *name);
 961
 962 /* rfc1035.c */
 963 unsigned int extract_request(struct dns_header *header, size_t qlen,
 964                                char *name, unsigned short *typep);
 965 size_t setup_reply(struct dns_header *header, size_t  qlen,
 966                    struct all_addr *addrp, unsigned int flags,
 967                    unsigned long local_ttl);
 968 int extract_addresses(struct dns_header *header, size_t qlen, char *namebuff,
 969                       time_t now, char **ipsets, int is_sign, int checkrebind,
 970                       int checking_disabled);
 971 size_t answer_request(struct dns_header *header, char *limit, size_t qlen,
 972                    struct in_addr local_addr, struct in_addr local_netmask, time_t now);
 973 int check_for_bogus_wildcard(struct dns_header *header, size_t qlen, char *name,
 974                              struct bogus_addr *addr, time_t now);
 975 unsigned char *find_pseudoheader(struct dns_header *header, size_t plen,
 976                                  size_t *len, unsigned char **p, int *is_sign);
 977 int check_for_local_domain(char *name, time_t now);
 978 unsigned int questions_crc(struct dns_header *header, size_t plen, char *buff);
 979 size_t resize_packet(struct dns_header *header, size_t plen,
 980                   unsigned char *pheader, size_t hlen);
 981 size_t add_mac(struct dns_header *header, size_t plen, char *limit, union mysockaddr *l3);
 982 size_t add_source_addr(struct dns_header *header, size_t plen, char *limit, union mysockaddr *source);
 983 int check_source(struct dns_header *header, size_t plen, unsigned char *pseudoheader, union mysockaddr *peer);
 984 int add_resource_record(struct dns_header *header, char *limit, int *truncp,
 985                         int nameoffset, unsigned char **pp, unsigned long ttl,
 986                         int *offset, unsigned short type, unsigned short class, char *format, ...);
 987 unsigned char *skip_questions(struct dns_header *header, size_t plen);
 988 int extract_name(struct dns_header *header, size_t plen, unsigned char **pp,
 989                  char *name, int isExtract, int extrabytes);
 990 int in_arpa_name_2_addr(char *namein, struct all_addr *addrp);
 991 int private_net(struct in_addr addr, int ban_localhost);
 992
 993 /* auth.c */
 994 #ifdef HAVE_AUTH
 995 size_t answer_auth(struct dns_header *header, char *limit, size_t qlen,
 996                    time_t now, union mysockaddr *peer_addr, int local_query);
 997 int in_zone(struct auth_zone *zone, char *name, char **cut);
 998 #endif
 999
1000 /* util.c */
1001 void rand_init(void);
1002 unsigned short rand16(void);
1003 int legal_hostname(char *c);
1004 char *canonicalise(char *s, int *nomem);
1005 unsigned char *do_rfc1035_name(unsigned char *p, char *sval);
1006 void *safe_malloc(size_t size);
1007 void safe_pipe(int *fd, int read_noblock);
1008 void *whine_malloc(size_t size);
1009 int sa_len(union mysockaddr *addr);
1010 int sockaddr_isequal(union mysockaddr *s1, union mysockaddr *s2);
1011 int hostname_isequal(const char *a, const char *b);
1012 time_t dnsmasq_time(void);
1013 int is_same_net(struct in_addr a, struct in_addr b, struct in_addr mask);
1014 #ifdef HAVE_IPV6
1015 int is_same_net6(struct in6_addr *a, struct in6_addr *b, int prefixlen);
1016 u64 addr6part(struct in6_addr *addr);
1017 void setaddr6part(struct in6_addr *addr, u64 host);
1018 #endif
1019 int retry_send(void);
1020 void prettyprint_time(char *buf, unsigned int t);
1021 int prettyprint_addr(union mysockaddr *addr, char *buf);
1022 int parse_hex(char *in, unsigned char *out, int maxlen,
1023               unsigned int *wildcard_mask, int *mac_type);
1024 int memcmp_masked(unsigned char *a, unsigned char *b, int len,
1025                   unsigned int mask);
1026 int expand_buf(struct iovec *iov, size_t size);
1027 char *print_mac(char *buff, unsigned char *mac, int len);
1028 void bump_maxfd(int fd, int *max);
1029 int read_write(int fd, unsigned char *packet, int size, int rw);
1030
1031 int wildcard_match(const char* wildcard, const char* match);
1032
1033 /* log.c */
1034 void die(char *message, char *arg1, int exit_code);
1035 int log_start(struct passwd *ent_pw, int errfd);
1036 int log_reopen(char *log_file);
1037 void my_syslog(int priority, const char *format, ...);
1038 void set_log_writer(fd_set *set, int *maxfdp);
1039 void check_log_writer(fd_set *set);
1040 void flush_log(void);
1041
1042 /* option.c */
1043 void read_opts (int argc, char **argv, char *compile_opts);
1044 char *option_string(int prot, unsigned int opt, unsigned char *val,
1045                     int opt_len, char *buf, int buf_len);
1046 void reread_dhcp(void);
1047 void set_option_bool(unsigned int opt);
1048 void reset_option_bool(unsigned int opt);
1049 struct hostsfile *expand_filelist(struct hostsfile *list);
1050 char *parse_server(char *arg, union mysockaddr *addr,
1051                    union mysockaddr *source_addr, char *interface, int *flags);
1052
1053 /* forward.c */
1054 void reply_query(int fd, int family, time_t now);
1055 void receive_query(struct listener *listen, time_t now);
1056 unsigned char *tcp_request(int confd, time_t now,
1057                            union mysockaddr *local_addr, struct in_addr netmask, int auth_dns);
1058 void server_gone(struct server *server);
1059 struct frec *get_new_frec(time_t now, int *wait);
1060 int send_from(int fd, int nowild, char *packet, size_t len,
1061                union mysockaddr *to, struct all_addr *source,
1062                unsigned int iface);
1063
1064 /* network.c */
1065 int indextoname(int fd, int index, char *name);
1066 int local_bind(int fd, union mysockaddr *addr, char *intname, int is_tcp);
1067 int random_sock(int family);
1068 void pre_allocate_sfds(void);
1069 int reload_servers(char *fname);
1070 void check_servers(void);
1071 int enumerate_interfaces(int reset);
1072 void create_wildcard_listeners(void);
1073 void create_bound_listeners(int die);
1074 void warn_bound_listeners(void);
1075 int is_dad_listeners(void);
1076 int iface_check(int family, struct all_addr *addr, char *name, int *auth_dns);
1077 int loopback_exception(int fd, int family, struct all_addr *addr, char *name);
1078 int label_exception(int index, int family, struct all_addr *addr);
1079 int fix_fd(int fd);
1080 int tcp_interface(int fd, int af);
1081 #ifdef HAVE_IPV6
1082 int set_ipv6pktinfo(int fd);
1083 #endif
1084 #ifdef HAVE_DHCP6
1085 void join_multicast(int dienow);
1086 #endif
1087
1088 /* dhcp.c */
1089 #ifdef HAVE_DHCP
1090 void dhcp_init(void);
1091 void dhcp_packet(time_t now, int pxe_fd);
1092 struct dhcp_context *address_available(struct dhcp_context *context,
1093                                        struct in_addr addr,
1094                                        struct dhcp_netid *netids);
1095 struct dhcp_context *narrow_context(struct dhcp_context *context,
1096                                     struct in_addr taddr,
1097                                     struct dhcp_netid *netids);
1098 int address_allocate(struct dhcp_context *context,
1099                      struct in_addr *addrp, unsigned char *hwaddr, int hw_len,
1100                      struct dhcp_netid *netids, time_t now);
1101 void dhcp_read_ethers(void);
1102 struct dhcp_config *config_find_by_address(struct dhcp_config *configs, struct in_addr addr);
1103 char *host_from_dns(struct in_addr addr);
1104 #endif
1105
1106 /* lease.c */
1107 #ifdef HAVE_DHCP
1108 void lease_update_file(time_t now);
1109 void lease_update_dns(int force);
1110 void lease_init(time_t now);
1111 struct dhcp_lease *lease4_allocate(struct in_addr addr);
1112 #ifdef HAVE_DHCP6
1113 struct dhcp_lease *lease6_allocate(struct in6_addr *addrp, int lease_type);
1114 struct dhcp_lease *lease6_find(unsigned char *clid, int clid_len,
1115                                int lease_type, int iaid, struct in6_addr *addr);
1116 void lease6_reset(void);
1117 struct dhcp_lease *lease6_find_by_client(struct dhcp_lease *first, int lease_type, unsigned char *clid, int clid_len, int iaid);
1118 struct dhcp_lease *lease6_find_by_addr(struct in6_addr *net, int prefix, u64 addr);
1119 u64 lease_find_max_addr6(struct dhcp_context *context);
1120 void lease_ping_reply(struct in6_addr *sender, unsigned char *packet, char *interface);
1121 void lease_update_slaac(time_t now);
1122 void lease_set_iaid(struct dhcp_lease *lease, int iaid);
1123 #endif
1124 void lease_set_hwaddr(struct dhcp_lease *lease, unsigned char *hwaddr,
1125                       unsigned char *clid, int hw_len, int hw_type, int clid_len, time_t now, int force);
1126 void lease_set_hostname(struct dhcp_lease *lease, char *name, int auth, char *domain, char *config_domain);
1127 void lease_set_expires(struct dhcp_lease *lease, unsigned int len, time_t now);
1128 void lease_set_interface(struct dhcp_lease *lease, int interface, time_t now);
1129 struct dhcp_lease *lease_find_by_client(unsigned char *hwaddr, int hw_len, int hw_type,
1130                                         unsigned char *clid, int clid_len);
1131 struct dhcp_lease *lease_find_by_addr(struct in_addr addr);
1132 struct in_addr lease_find_max_addr(struct dhcp_context *context);
1133 void lease_prune(struct dhcp_lease *target, time_t now);
1134 void lease_update_from_configs(void);
1135 int do_script_run(time_t now);
1136 void rerun_scripts(void);
1137 void lease_find_interfaces(time_t now);
1138 #ifdef HAVE_SCRIPT
1139 void lease_add_extradata(struct dhcp_lease *lease, unsigned char *data,
1140                          unsigned int len, int delim);
1141 #endif
1142 #endif
1143
1144 /* rfc2131.c */
1145 #ifdef HAVE_DHCP
1146 size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
1147                   size_t sz, time_t now, int unicast_dest, int *is_inform, int pxe_fd, struct in_addr fallback);
1148 unsigned char *extended_hwaddr(int hwtype, int hwlen, unsigned char *hwaddr,
1149                                int clid_len, unsigned char *clid, int *len_out);
1150 #endif
1151
1152 /* dnsmasq.c */
1153 #ifdef HAVE_DHCP
1154 int make_icmp_sock(void);
1155 int icmp_ping(struct in_addr addr);
1156 #endif
1157 #ifdef HAVE_TOMATO
1158 void tomato_helper(time_t now);
1159 #endif
1160 #ifdef HAVE_LEASEFILE_EXPIRE //originally TOMATO option
1161 void flush_lease_file(time_t now);
1162 #endif
1163 void send_alarm(time_t event, time_t now);
1164 void send_event(int fd, int event, int data, char *msg);
1165 void clear_cache_and_reload(time_t now);
1166 void poll_resolv(int force, int do_reload, time_t now);
1167
1168 /* netlink.c */
1169 #ifdef HAVE_LINUX_NETWORK
1170 void netlink_init(void);
1171 void netlink_multicast(time_t now);
1172 #endif
1173
1174 /* bpf.c */
1175 #ifdef HAVE_BSD_NETWORK
1176 void init_bpf(void);
1177 void send_via_bpf(struct dhcp_packet *mess, size_t len,
1178                   struct in_addr iface_addr, struct ifreq *ifr);
1179 #endif
1180
1181 /* bpf.c or netlink.c */
1182 int iface_enumerate(int family, void *parm, int (callback)());
1183
1184 /* dbus.c */
1185 #ifdef HAVE_DBUS
1186 char *dbus_init(void);
1187 void check_dbus_listeners(fd_set *rset, fd_set *wset, fd_set *eset);
1188 void set_dbus_listeners(int *maxfdp, fd_set *rset, fd_set *wset, fd_set *eset);
1189 #  ifdef HAVE_DHCP
1190 void emit_dbus_signal(int action, struct dhcp_lease *lease, char *hostname);
1191 #  endif
1192 #endif
1193
1194 /* ipset.c */
1195 #ifdef HAVE_IPSET
1196 void ipset_init(void);
1197 int add_to_ipset(const char *setname, const struct all_addr *ipaddr, int flags, int remove);
1198 #endif
1199
1200 /* helper.c */
1201 #if defined(HAVE_SCRIPT)
1202 int create_helper(int event_fd, int err_fd, uid_t uid, gid_t gid, long max_fd);
1203 void helper_write(void);
1204 void queue_script(int action, struct dhcp_lease *lease,
1205                   char *hostname, time_t now);
1206 #ifdef HAVE_TFTP
1207 void queue_tftp(off_t file_len, char *filename, union mysockaddr *peer);
1208 #endif
1209 int helper_buf_empty(void);
1210 #endif
1211
1212 /* tftp.c */
1213 #ifdef HAVE_TFTP
1214 void tftp_request(struct listener *listen, time_t now);
1215 void check_tftp_listeners(fd_set *rset, time_t now);
1216 int do_tftp_script_run(void);
1217 #endif
1218
1219 /* conntrack.c */
1220 #ifdef HAVE_CONNTRACK
1221 int get_incoming_mark(union mysockaddr *peer_addr, struct all_addr *local_addr,
1222                       int istcp, unsigned int *markp);
1223 #endif
1224
1225 /* dhcp6.c */
1226 #ifdef HAVE_DHCP6
1227 void dhcp6_init(void);
1228 void dhcp6_packet(time_t now);
1229 struct dhcp_context *address6_allocate(struct dhcp_context *context,  unsigned char *clid, int clid_len,
1230                                        int iaid, int serial, struct dhcp_netid *netids, int plain_range, struct in6_addr *ans);
1231 int config_valid(struct dhcp_config *config, struct dhcp_context *context, struct in6_addr *addr);
1232 struct dhcp_context *address6_available(struct dhcp_context *context,
1233                                         struct in6_addr *taddr,
1234                                         struct dhcp_netid *netids,
1235                                         int plain_range);
1236 struct dhcp_context *address6_valid(struct dhcp_context *context,
1237                                     struct in6_addr *taddr,
1238                                     struct dhcp_netid *netids,
1239                                     int plain_range);
1240 struct dhcp_config *config_find_by_address6(struct dhcp_config *configs, struct in6_addr *net,
1241                                             int prefix, u64 addr);
1242 void make_duid(time_t now);
1243 void dhcp_construct_contexts(time_t now);
1244 void get_client_mac(struct in6_addr *client, int iface, unsigned char *mac,
1245                     unsigned int *maclenp, unsigned int *mactypep);
1246 #endif
1247
1248 /* rfc3315.c */
1249 #ifdef HAVE_DHCP6
1250 unsigned short dhcp6_reply(struct dhcp_context *context, int interface, char *iface_name,
1251                            struct in6_addr *fallback, size_t sz, struct in6_addr *client_addr, time_t now);
1252 void relay_upstream6(struct dhcp_relay *relay, ssize_t sz, struct in6_addr *peer_address, u32 scope_id);
1253
1254 unsigned short relay_reply6( struct sockaddr_in6 *peer, ssize_t sz, char *arrival_interface);
1255 #endif
1256
1257 /* dhcp-common.c */
1258 #ifdef HAVE_DHCP
1259 void dhcp_common_init(void);
1260 ssize_t recv_dhcp_packet(int fd, struct msghdr *msg);
1261 struct dhcp_netid *run_tag_if(struct dhcp_netid *input);
1262 struct dhcp_netid *option_filter(struct dhcp_netid *tags, struct dhcp_netid *context_tags,
1263                                  struct dhcp_opt *opts);
1264 int match_netid(struct dhcp_netid *check, struct dhcp_netid *pool, int negonly);
1265 char *strip_hostname(char *hostname);
1266 void log_tags(struct dhcp_netid *netid, u32 xid);
1267 int match_bytes(struct dhcp_opt *o, unsigned char *p, int len);
1268 void dhcp_update_configs(struct dhcp_config *configs);
1269 void display_opts(void);
1270 int lookup_dhcp_opt(int prot, char *name);
1271 int lookup_dhcp_len(int prot, int val);
1272 char *option_string(int prot, unsigned int opt, unsigned char *val,
1273                     int opt_len, char *buf, int buf_len);
1274 struct dhcp_config *find_config(struct dhcp_config *configs,
1275                                 struct dhcp_context *context,
1276                                 unsigned char *clid, int clid_len,
1277                                 unsigned char *hwaddr, int hw_len,
1278                                 int hw_type, char *hostname);
1279 int config_has_mac(struct dhcp_config *config, unsigned char *hwaddr, int len, int type);
1280 #ifdef HAVE_LINUX_NETWORK
1281 char *whichdevice(void);
1282 void bindtodevice(char *device, int fd);
1283 #endif
1284 #  ifdef HAVE_DHCP6
1285 void display_opts6(void);
1286 #  endif
1287 void log_context(int family, struct dhcp_context *context);
1288 void log_relay(int family, struct dhcp_relay *relay);
1289 #endif
1290
1291 /* outpacket.c */
1292 #ifdef HAVE_DHCP6
1293 void end_opt6(int container);
1294 int save_counter(int newval);
1295 void *expand(size_t headroom);
1296 int new_opt6(int opt);
1297 void *put_opt6(void *data, size_t len);
1298 void put_opt6_long(unsigned int val);
1299 void put_opt6_short(unsigned int val);
1300 void put_opt6_char(unsigned int val);
1301 void put_opt6_string(char *s);
1302 #endif
1303
1304 /* radv.c */
1305 #ifdef HAVE_DHCP6
1306 void ra_init(time_t now);
1307 void icmp6_packet(time_t now);
1308 time_t periodic_ra(time_t now);
1309 void ra_start_unsolicted(time_t now, struct dhcp_context *context);
1310 #endif
1311
1312 /* slaac.c */
1313 #ifdef HAVE_DHCP6
1314 void slaac_add_addrs(struct dhcp_lease *lease, time_t now, int force);
1315 time_t periodic_slaac(time_t now, struct dhcp_lease *leases);
1316 void slaac_ping_reply(struct in6_addr *sender, unsigned char *packet, char *interface, struct dhcp_lease *leases);
1317 #endif