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
 168 /* Exit codes. */
 169 #define EC_GOOD        0
 170 #define EC_BADCONF     1
 171 #define EC_BADNET      2
 172 #define EC_FILE        3
 173 #define EC_NOMEM       4
 174 #define EC_MISC        5
 175 #define EC_INIT_OFFSET 10
 176
 177 /* Min buffer size: we check after adding each record, so there must be
 178    memory for the largest packet, and the largest record so the
 179    min for DNS is PACKETSZ+MAXDNAME+RRFIXEDSZ which is < 1000.
 180    This might be increased is EDNS packet size if greater than the minimum.
 181 */
 182 #define DNSMASQ_PACKETSZ PACKETSZ+MAXDNAME+RRFIXEDSZ
 183
 184 /* Trust the compiler dead-code eliminator.... */
 185 #define option_bool(x) (((x) < 32) ? daemon->options & (1u << (x)) : daemon->options2 & (1u << ((x) - 32)))
 186
 187 #define OPT_BOGUSPRIV      0
 188 #define OPT_FILTER         1
 189 #define OPT_LOG            2
 190 #define OPT_SELFMX         3
 191 #define OPT_NO_HOSTS       4
 192 #define OPT_NO_POLL        5
 193 #define OPT_DEBUG          6
 194 #define OPT_ORDER          7
 195 #define OPT_NO_RESOLV      8
 196 #define OPT_EXPAND         9
 197 #define OPT_LOCALMX        10
 198 #define OPT_NO_NEG         11
 199 #define OPT_NODOTS_LOCAL   12
 200 #define OPT_NOWILD         13
 201 #define OPT_ETHERS         14
 202 #define OPT_RESOLV_DOMAIN  15
 203 #define OPT_NO_FORK        16
 204 #define OPT_AUTHORITATIVE  17
 205 #define OPT_LOCALISE       18
 206 #define OPT_DBUS           19
 207 #define OPT_DHCP_FQDN      20
 208 #define OPT_NO_PING        21
 209 #define OPT_LEASE_RO       22
 210 #define OPT_ALL_SERVERS    23
 211 #define OPT_RELOAD         24
 212 #define OPT_LOCAL_REBIND   25
 213 #define OPT_TFTP_SECURE    26
 214 #define OPT_TFTP_NOBLOCK   27
 215 #define OPT_LOG_OPTS       28
 216 #define OPT_TFTP_APREF     29
 217 #define OPT_NO_OVERRIDE    30
 218 #define OPT_NO_REBIND      31
 219 #define OPT_ADD_MAC        32
 220 #define OPT_DNSSEC_PROXY   33
 221 #define OPT_CONSEC_ADDR    34
 222 #define OPT_CONNTRACK      35
 223 #define OPT_FQDN_UPDATE    36
 224 #define OPT_RA             37
 225 #define OPT_TFTP_LC        38
 226 #define OPT_CLEVERBIND     39
 227 #define OPT_TFTP           40
 228 #define OPT_CLIENT_SUBNET  41
 229 #define OPT_QUIET_DHCP     42
 230 #define OPT_QUIET_DHCP6    43
 231 #define OPT_QUIET_RA       44
 232 #define OPT_DNSSEC_VALID   45
 233 #define OPT_DNSSEC_PERMISS 46
 234 #define OPT_DNSSEC_DEBUG   47
 235 #define OPT_LAST           48
 236
 237 /* extra flags for my_syslog, we use a couple of facilities since they are known
 238    not to occupy the same bits as priorities, no matter how syslog.h is set up. */
 239 #define MS_TFTP LOG_USER
 240 #define MS_DHCP LOG_DAEMON
 241
 242 struct all_addr {
 243   union {
 244     struct in_addr addr4;
 245 #ifdef HAVE_IPV6
 246     struct in6_addr addr6;
 247 #endif
 248     /* for log_query */
 249     unsigned int keytag;
 250     /* for cache_insert if RRSIG, DNSKEY, DS */
 251     struct {
 252       unsigned short class, type;
 253     } dnssec;
 254   } addr;
 255 };
 256
 257 struct bogus_addr {
 258   struct in_addr addr;
 259   struct bogus_addr *next;
 260 };
 261
 262 /* dns doctor param */
 263 struct doctor {
 264   struct in_addr in, end, out, mask;
 265   struct doctor *next;
 266 };
 267
 268 struct mx_srv_record {
 269   char *name, *target;
 270   int issrv, srvport, priority, weight;
 271   unsigned int offset;
 272   struct mx_srv_record *next;
 273 };
 274
 275 struct naptr {
 276   char *name, *replace, *regexp, *services, *flags;
 277   unsigned int order, pref;
 278   struct naptr *next;
 279 };
 280
 281 struct txt_record {
 282   char *name;
 283   unsigned char *txt;
 284   unsigned short class, len;
 285   struct txt_record *next;
 286 };
 287
 288 struct ptr_record {
 289   char *name, *ptr;
 290   struct ptr_record *next;
 291 };
 292
 293 struct cname {
 294   char *alias, *target;
 295   struct cname *next;
 296 };
 297
 298 struct dnskey {
 299   char *name, *key;
 300   int keylen, class, algo, flags;
 301   struct dnskey *next;
 302 };
 303
 304 #define ADDRLIST_LITERAL 1
 305 #define ADDRLIST_IPV6    2
 306
 307 struct addrlist {
 308   struct all_addr addr;
 309   int flags, prefixlen;
 310   struct addrlist *next;
 311 };
 312
 313 #define AUTH6     1
 314 #define AUTH4     2
 315
 316 struct auth_zone {
 317   char *domain;
 318   struct auth_name_list {
 319     char *name;
 320     int flags;
 321     struct auth_name_list *next;
 322   } *interface_names;
 323   struct addrlist *subnet;
 324   struct auth_zone *next;
 325 };
 326
 327
 328 struct host_record {
 329   struct name_list {
 330     char *name;
 331     struct name_list *next;
 332   } *names;
 333   struct in_addr addr;
 334 #ifdef HAVE_IPV6
 335   struct in6_addr addr6;
 336 #endif
 337   struct host_record *next;
 338 };
 339
 340 struct interface_name {
 341   char *name; /* domain name */
 342   char *intr; /* interface name */
 343   int family; /* AF_INET, AF_INET6 or zero for both */
 344   struct addrlist *addr;
 345   struct interface_name *next;
 346 };
 347
 348 union bigname {
 349   char name[MAXDNAME];
 350   union bigname *next; /* freelist */
 351 };
 352
 353 struct blockdata {
 354   struct blockdata *next;
 355   unsigned char key[KEYBLOCK_LEN];
 356 };
 357
 358 struct crec {
 359   struct crec *next, *prev, *hash_next;
 360   /* union is 16 bytes when doing IPv6, 8 bytes on 32 bit machines without IPv6 */
 361   union {
 362     struct all_addr addr;
 363     struct {
 364       union {
 365         struct crec *cache;
 366         struct interface_name *int_name;
 367       } target;
 368       int uid; /* -1 if union is interface-name */
 369     } cname;
 370     struct {
 371       struct blockdata *keydata;
 372       unsigned short keylen, flags, keytag;
 373       unsigned char algo;
 374     } key;
 375     struct {
 376       struct blockdata *keydata;
 377       unsigned short keylen, keytag;
 378       unsigned char algo;
 379       unsigned char digest;
 380     } ds;
 381     struct {
 382       struct blockdata *keydata;
 383       unsigned short keylen, type_covered, keytag;
 384       char algo;
 385     } sig;
 386   } addr;
 387   time_t ttd; /* time to die */
 388   /* used as class if DNSKEY/DS/RRSIG, index to source for F_HOSTS */
 389   int uid;
 390   unsigned short flags;
 391   union {
 392     char sname[SMALLDNAME];
 393     union bigname *bname;
 394     char *namep;
 395   } name;
 396 };
 397
 398 #define F_IMMORTAL  (1u<<0)
 399 #define F_NAMEP     (1u<<1)
 400 #define F_REVERSE   (1u<<2)
 401 #define F_FORWARD   (1u<<3)
 402 #define F_DHCP      (1u<<4)
 403 #define F_NEG       (1u<<5)
 404 #define F_HOSTS     (1u<<6)
 405 #define F_IPV4      (1u<<7)
 406 #define F_IPV6      (1u<<8)
 407 #define F_BIGNAME   (1u<<9)
 408 #define F_NXDOMAIN  (1u<<10)
 409 #define F_CNAME     (1u<<11)
 410 #define F_DNSKEY    (1u<<12)
 411 #define F_CONFIG    (1u<<13)
 412 #define F_DS        (1u<<14)
 413 #define F_DNSSECOK  (1u<<15)
 414
 415 /* below here are only valid as args to log_query: cache
 416    entries are limited to 16 bits */
 417 #define F_UPSTREAM  (1u<<16)
 418 #define F_RRNAME    (1u<<17)
 419 #define F_SERVER    (1u<<18)
 420 #define F_QUERY     (1u<<19)
 421 #define F_NOERR     (1u<<20)
 422 #define F_AUTH      (1u<<21)
 423 #define F_DNSSEC    (1u<<22)
 424 #define F_KEYTAG    (1u<<23)
 425 #define F_SECSTAT   (1u<<24)
 426
 427
 428 /* struct sockaddr is not large enough to hold any address,
 429    and specifically not big enough to hold an IPv6 address.
 430    Blech. Roll our own. */
 431 union mysockaddr {
 432   struct sockaddr sa;
 433   struct sockaddr_in in;
 434 #if defined(HAVE_IPV6)
 435   struct sockaddr_in6 in6;
 436 #endif
 437 };
 438
 439 /* bits in flag param to IPv6 callbacks from iface_enumerate() */
 440 #define IFACE_TENTATIVE   1
 441 #define IFACE_DEPRECATED  2
 442 #define IFACE_PERMANENT   4
 443
 444
 445 #define SERV_FROM_RESOLV       1  /* 1 for servers from resolv, 0 for command line. */
 446 #define SERV_NO_ADDR           2  /* no server, this domain is local only */
 447 #define SERV_LITERAL_ADDRESS   4  /* addr is the answer, not the server */
 448 #define SERV_HAS_DOMAIN        8  /* server for one domain only */
 449 #define SERV_HAS_SOURCE       16  /* source address defined */
 450 #define SERV_FOR_NODOTS       32  /* server for names with no domain part only */
 451 #define SERV_WARNED_RECURSIVE 64  /* avoid warning spam */
 452 #define SERV_FROM_DBUS       128  /* 1 if source is DBus */
 453 #define SERV_MARK            256  /* for mark-and-delete */
 454 #define SERV_TYPE    (SERV_HAS_DOMAIN | SERV_FOR_NODOTS)
 455 #define SERV_COUNTED         512  /* workspace for log code */
 456 #define SERV_USE_RESOLV     1024  /* forward this domain in the normal way */
 457 #define SERV_NO_REBIND      2048  /* inhibit dns-rebind protection */
 458
 459 struct serverfd {
 460   int fd;
 461   union mysockaddr source_addr;
 462   char interface[IF_NAMESIZE+1];
 463   struct serverfd *next;
 464 };
 465
 466 struct randfd {
 467   int fd;
 468   unsigned short refcount, family;
 469 };
 470
 471 struct server {
 472   union mysockaddr addr, source_addr;
 473   char interface[IF_NAMESIZE+1];
 474   struct serverfd *sfd;
 475   char *domain; /* set if this server only handles a domain. */
 476   int flags, tcpfd;
 477   unsigned int queries, failed_queries;
 478   struct server *next;
 479 };
 480
 481 struct ipsets {
 482   char **sets;
 483   char *domain;
 484   struct ipsets *next;
 485 };
 486
 487 struct irec {
 488   union mysockaddr addr;
 489   struct in_addr netmask; /* only valid for IPv4 */
 490   int tftp_ok, dhcp_ok, mtu, done, warned, dad, dns_auth, index, multicast_done, found;
 491   char *name;
 492   struct irec *next;
 493 };
 494
 495 struct listener {
 496   int fd, tcpfd, tftpfd, family;
 497   struct irec *iface; /* only sometimes valid for non-wildcard */
 498   struct listener *next;
 499 };
 500
 501 /* interface and address parms from command line. */
 502 struct iname {
 503   char *name;
 504   union mysockaddr addr;
 505   int used;
 506   struct iname *next;
 507 };
 508
 509 /* resolv-file parms from command-line */
 510 struct resolvc {
 511   struct resolvc *next;
 512   int is_default, logged;
 513   time_t mtime;
 514   char *name;
 515 };
 516
 517 /* adn-hosts parms from command-line (also dhcp-hostsfile and dhcp-optsfile */
 518 #define AH_DIR      1
 519 #define AH_INACTIVE 2
 520 struct hostsfile {
 521   struct hostsfile *next;
 522   int flags;
 523   char *fname;
 524   int index; /* matches to cache entries for logging */
 525 };
 526
 527
 528 /* DNSSEC status values. */
 529 #define STAT_SECURE             1
 530 #define STAT_INSECURE           2
 531 #define STAT_BOGUS              3
 532 #define STAT_NEED_DS            4
 533 #define STAT_NEED_KEY           5
 534 #define STAT_TRUNCATED          6
 535
 536 #define FREC_NOREBIND           1
 537 #define FREC_CHECKING_DISABLED  2
 538 #define FREC_HAS_SUBNET         4
 539 #define FREC_DNSKEY_QUERY       8
 540 #define FREC_DS_QUERY          16
 541
 542 #ifdef HAVE_DNSSEC
 543 #define HASH_SIZE 20 /* SHA-1 digest size */
 544 #else
 545 #define HASH_SIZE sizeof(int)
 546 #endif
 547
 548 struct frec {
 549   union mysockaddr source;
 550   struct all_addr dest;
 551   struct server *sentto; /* NULL means free */
 552   struct randfd *rfd4;
 553 #ifdef HAVE_IPV6
 554   struct randfd *rfd6;
 555 #endif
 556   unsigned int iface;
 557   unsigned short orig_id, new_id;
 558   int fd, forwardall, flags;
 559   time_t time;
 560   unsigned char *hash[HASH_SIZE];
 561 #ifdef HAVE_DNSSEC
 562   int class;
 563   struct blockdata *stash; /* Saved reply, whilst we validate */
 564   size_t stash_len;
 565   struct frec *dependent; /* Query awaiting internally-generated DNSKEY or DS query */
 566   struct frec *blocking_query; /* Query which is blocking us. */
 567 #endif
 568   struct frec *next;
 569 };
 570
 571 /* flags in top of length field for DHCP-option tables */
 572 #define OT_ADDR_LIST    0x8000
 573 #define OT_RFC1035_NAME 0x4000
 574 #define OT_INTERNAL     0x2000
 575 #define OT_NAME         0x1000
 576 #define OT_CSTRING      0x0800
 577 #define OT_DEC          0x0400
 578 #define OT_TIME         0x0200
 579
 580 /* actions in the daemon->helper RPC */
 581 #define ACTION_DEL           1
 582 #define ACTION_OLD_HOSTNAME  2
 583 #define ACTION_OLD           3
 584 #define ACTION_ADD           4
 585 #define ACTION_TFTP          5
 586
 587 #define LEASE_NEW            1  /* newly created */
 588 #define LEASE_CHANGED        2  /* modified */
 589 #define LEASE_AUX_CHANGED    4  /* CLID or expiry changed */
 590 #define LEASE_AUTH_NAME      8  /* hostname came from config, not from client */
 591 #define LEASE_USED          16  /* used this DHCPv6 transaction */
 592 #define LEASE_NA            32  /* IPv6 no-temporary lease */
 593 #define LEASE_TA            64  /* IPv6 temporary lease */
 594 #define LEASE_HAVE_HWADDR  128  /* Have set hwaddress */
 595
 596 struct dhcp_lease {
 597   int clid_len;          /* length of client identifier */
 598   unsigned char *clid;   /* clientid */
 599   char *hostname, *fqdn; /* name from client-hostname option or config */
 600   char *old_hostname;    /* hostname before it moved to another lease */
 601   int flags;
 602   time_t expires;        /* lease expiry */
 603 #ifdef HAVE_BROKEN_RTC
 604   unsigned int length;
 605 #endif
 606   int hwaddr_len, hwaddr_type;
 607   unsigned char hwaddr[DHCP_CHADDR_MAX];
 608   struct in_addr addr, override, giaddr;
 609   unsigned char *extradata;
 610   unsigned int extradata_len, extradata_size;
 611   int last_interface;
 612 #ifdef HAVE_DHCP6
 613   struct in6_addr addr6;
 614   int iaid;
 615   struct slaac_address {
 616     struct in6_addr addr;
 617     time_t ping_time;
 618     int backoff; /* zero -> confirmed */
 619     struct slaac_address *next;
 620   } *slaac_address;
 621   int vendorclass_count;
 622 #endif
 623   struct dhcp_lease *next;
 624 };
 625
 626 struct dhcp_netid {
 627   char *net;
 628   struct dhcp_netid *next;
 629 };
 630
 631 struct dhcp_netid_list {
 632   struct dhcp_netid *list;
 633   struct dhcp_netid_list *next;
 634 };
 635
 636 struct tag_if {
 637   struct dhcp_netid_list *set;
 638   struct dhcp_netid *tag;
 639   struct tag_if *next;
 640 };
 641
 642 struct hwaddr_config {
 643   int hwaddr_len, hwaddr_type;
 644   unsigned char hwaddr[DHCP_CHADDR_MAX];
 645   unsigned int wildcard_mask;
 646   struct hwaddr_config *next;
 647 };
 648
 649 struct dhcp_config {
 650   unsigned int flags;
 651   int clid_len;          /* length of client identifier */
 652   unsigned char *clid;   /* clientid */
 653   char *hostname, *domain;
 654   struct dhcp_netid_list *netid;
 655 #ifdef HAVE_DHCP6
 656   struct in6_addr addr6;
 657 #endif
 658   struct in_addr addr;
 659   time_t decline_time;
 660   unsigned int lease_time;
 661   struct hwaddr_config *hwaddr;
 662   struct dhcp_config *next;
 663 };
 664
 665 #define have_config(config, mask) ((config) && ((config)->flags & (mask)))
 666
 667 #define CONFIG_DISABLE           1
 668 #define CONFIG_CLID              2
 669 #define CONFIG_TIME              8
 670 #define CONFIG_NAME             16
 671 #define CONFIG_ADDR             32
 672 #define CONFIG_NOCLID          128
 673 #define CONFIG_FROM_ETHERS     256    /* entry created by /etc/ethers */
 674 #define CONFIG_ADDR_HOSTS      512    /* address added by from /etc/hosts */
 675 #define CONFIG_DECLINED       1024    /* address declined by client */
 676 #define CONFIG_BANK           2048    /* from dhcp hosts file */
 677 #define CONFIG_ADDR6          4096
 678 #define CONFIG_WILDCARD       8192
 679
 680 struct dhcp_opt {
 681   int opt, len, flags;
 682   union {
 683     int encap;
 684     unsigned int wildcard_mask;
 685     unsigned char *vendor_class;
 686   } u;
 687   unsigned char *val;
 688   struct dhcp_netid *netid;
 689   struct dhcp_opt *next;
 690 };
 691
 692 #define DHOPT_ADDR               1
 693 #define DHOPT_STRING             2
 694 #define DHOPT_ENCAPSULATE        4
 695 #define DHOPT_ENCAP_MATCH        8
 696 #define DHOPT_FORCE             16
 697 #define DHOPT_BANK              32
 698 #define DHOPT_ENCAP_DONE        64
 699 #define DHOPT_MATCH            128
 700 #define DHOPT_VENDOR           256
 701 #define DHOPT_HEX              512
 702 #define DHOPT_VENDOR_MATCH    1024
 703 #define DHOPT_RFC3925         2048
 704 #define DHOPT_TAGOK           4096
 705 #define DHOPT_ADDR6           8192
 706
 707 struct dhcp_boot {
 708   char *file, *sname, *tftp_sname;
 709   struct in_addr next_server;
 710   struct dhcp_netid *netid;
 711   struct dhcp_boot *next;
 712 };
 713
 714 struct pxe_service {
 715   unsigned short CSA, type;
 716   char *menu, *basename, *sname;
 717   struct in_addr server;
 718   struct dhcp_netid *netid;
 719   struct pxe_service *next;
 720 };
 721
 722 #define MATCH_VENDOR     1
 723 #define MATCH_USER       2
 724 #define MATCH_CIRCUIT    3
 725 #define MATCH_REMOTE     4
 726 #define MATCH_SUBSCRIBER 5
 727
 728 /* vendorclass, userclass, remote-id or cicuit-id */
 729 struct dhcp_vendor {
 730   int len, match_type;
 731   unsigned int enterprise;
 732   char *data;
 733   struct dhcp_netid netid;
 734   struct dhcp_vendor *next;
 735 };
 736
 737 struct dhcp_mac {
 738   unsigned int mask;
 739   int hwaddr_len, hwaddr_type;
 740   unsigned char hwaddr[DHCP_CHADDR_MAX];
 741   struct dhcp_netid netid;
 742   struct dhcp_mac *next;
 743 };
 744
 745 struct dhcp_bridge {
 746   char iface[IF_NAMESIZE];
 747   struct dhcp_bridge *alias, *next;
 748 };
 749
 750 struct cond_domain {
 751   char *domain, *prefix;
 752   struct in_addr start, end;
 753 #ifdef HAVE_IPV6
 754   struct in6_addr start6, end6;
 755 #endif
 756   int is6;
 757   struct cond_domain *next;
 758 };
 759
 760 #ifdef OPTION6_PREFIX_CLASS
 761 struct prefix_class {
 762   int class;
 763   struct dhcp_netid tag;
 764   struct prefix_class *next;
 765 };
 766 #endif
 767
 768 struct ra_interface {
 769   char *name;
 770   int interval, lifetime, prio;
 771   struct ra_interface *next;
 772 };
 773
 774 struct dhcp_context {
 775   unsigned int lease_time, addr_epoch;
 776   struct in_addr netmask, broadcast;
 777   struct in_addr local, router;
 778   struct in_addr start, end; /* range of available addresses */
 779 #ifdef HAVE_DHCP6
 780   struct in6_addr start6, end6; /* range of available addresses */
 781   struct in6_addr local6;
 782   int prefix, if_index;
 783   unsigned int valid, preferred, saved_valid;
 784   time_t ra_time, ra_short_period_start, address_lost_time;
 785   char *template_interface;
 786 #endif
 787   int flags;
 788   struct dhcp_netid netid, *filter;
 789   struct dhcp_context *next, *current;
 790 };
 791
 792 #define CONTEXT_STATIC         (1u<<0)
 793 #define CONTEXT_NETMASK        (1u<<1)
 794 #define CONTEXT_BRDCAST        (1u<<2)
 795 #define CONTEXT_PROXY          (1u<<3)
 796 #define CONTEXT_RA_ONLY        (1u<<4)
 797 #define CONTEXT_RA_DONE        (1u<<5)
 798 #define CONTEXT_RA_NAME        (1u<<6)
 799 #define CONTEXT_RA_STATELESS   (1u<<7)
 800 #define CONTEXT_DHCP           (1u<<8)
 801 #define CONTEXT_DEPRECATE      (1u<<9)
 802 #define CONTEXT_TEMPLATE       (1u<<10)    /* create contexts using addresses */
 803 #define CONTEXT_CONSTRUCTED    (1u<<11)
 804 #define CONTEXT_GC             (1u<<12)
 805 #define CONTEXT_RA             (1u<<13)
 806 #define CONTEXT_CONF_USED      (1u<<14)
 807 #define CONTEXT_USED           (1u<<15)
 808 #define CONTEXT_OLD            (1u<<16)
 809 #define CONTEXT_V6             (1u<<17)
 810
 811
 812 struct ping_result {
 813   struct in_addr addr;
 814   time_t time;
 815   unsigned int hash;
 816   struct ping_result *next;
 817 };
 818
 819 struct tftp_file {
 820   int refcount, fd;
 821   off_t size;
 822   dev_t dev;
 823   ino_t inode;
 824   char filename[];
 825 };
 826
 827 struct tftp_transfer {
 828   int sockfd;
 829   time_t timeout;
 830   int backoff;
 831   unsigned int block, blocksize, expansion;
 832   off_t offset;
 833   union mysockaddr peer;
 834   char opt_blocksize, opt_transize, netascii, carrylf;
 835   struct tftp_file *file;
 836   struct tftp_transfer *next;
 837 };
 838
 839 struct addr_list {
 840   struct in_addr addr;
 841   struct addr_list *next;
 842 };
 843
 844 struct tftp_prefix {
 845   char *interface;
 846   char *prefix;
 847   struct tftp_prefix *next;
 848 };
 849
 850 struct dhcp_relay {
 851   struct all_addr local, server;
 852   char *interface; /* Allowable interface for replies from server, and dest for IPv6 multicast */
 853   int iface_index; /* working - interface in which requests arrived, for return */
 854   struct dhcp_relay *current, *next;
 855 };
 856
 857 extern struct daemon {
 858   /* datastuctures representing the command-line and
 859      config file arguments. All set (including defaults)
 860      in option.c */
 861
 862   unsigned int options, options2;
 863   struct resolvc default_resolv, *resolv_files;
 864   time_t last_resolv;
 865   struct mx_srv_record *mxnames;
 866   struct naptr *naptr;
 867   struct txt_record *txt, *rr;
 868   struct ptr_record *ptr;
 869   struct host_record *host_records, *host_records_tail;
 870   struct cname *cnames;
 871   struct auth_zone *auth_zones;
 872   struct interface_name *int_names;
 873   char *mxtarget;
 874   int addr4_netmask;
 875   int addr6_netmask;
 876   char *lease_file;
 877   char *username, *groupname, *scriptuser;
 878   char *luascript;
 879   char *authserver, *hostmaster;
 880   struct iname *authinterface;
 881   struct name_list *secondary_forward_server;
 882   int group_set, osport;
 883   char *domain_suffix;
 884   struct cond_domain *cond_domain, *synth_domains;
 885   char *runfile;
 886   char *lease_change_command;
 887   struct iname *if_names, *if_addrs, *if_except, *dhcp_except, *auth_peers, *tftp_interfaces;
 888   struct bogus_addr *bogus_addr;
 889   struct server *servers;
 890   struct ipsets *ipsets;
 891   int log_fac; /* log facility */
 892   char *log_file; /* optional log file */
 893   int max_logs;  /* queue limit */
 894   int cachesize, ftabsize;
 895   int port, query_port, min_port;
 896   unsigned long local_ttl, neg_ttl, max_ttl, max_cache_ttl, auth_ttl;
 897   struct hostsfile *addn_hosts;
 898   struct dhcp_context *dhcp, *dhcp6;
 899   struct ra_interface *ra_interfaces;
 900   struct dhcp_config *dhcp_conf;
 901   struct dhcp_opt *dhcp_opts, *dhcp_match, *dhcp_opts6, *dhcp_match6;
 902   struct dhcp_vendor *dhcp_vendors;
 903   struct dhcp_mac *dhcp_macs;
 904   struct dhcp_boot *boot_config;
 905   struct pxe_service *pxe_services;
 906   struct tag_if *tag_if;
 907   struct addr_list *override_relays;
 908   struct dhcp_relay *relay4, *relay6;
 909   int override;
 910   int enable_pxe;
 911   int doing_ra, doing_dhcp6;
 912   struct dhcp_netid_list *dhcp_ignore, *dhcp_ignore_names, *dhcp_gen_names;
 913   struct dhcp_netid_list *force_broadcast, *bootp_dynamic;
 914   struct hostsfile *dhcp_hosts_file, *dhcp_opts_file;
 915   int dhcp_max, tftp_max;
 916   int dhcp_server_port, dhcp_client_port;
 917   int start_tftp_port, end_tftp_port;
 918   unsigned int min_leasetime;
 919   struct doctor *doctors;
 920   unsigned short edns_pktsz;
 921   char *tftp_prefix;
 922   struct tftp_prefix *if_prefix; /* per-interface TFTP prefixes */
 923   unsigned int duid_enterprise, duid_config_len;
 924   unsigned char *duid_config;
 925   char *dbus_name;
 926   unsigned long soa_sn, soa_refresh, soa_retry, soa_expiry;
 927 #ifdef OPTION6_PREFIX_CLASS
 928   struct prefix_class *prefix_classes;
 929 #endif
 930 #ifdef HAVE_DNSSEC
 931   struct dnskey *dnskeys;
 932 #endif
 933
 934   /* globally used stuff for DNS */
 935   char *packet; /* packet buffer */
 936   int packet_buff_sz; /* size of above */
 937   char *namebuff; /* MAXDNAME size buffer */
 938 #ifdef HAVE_DNSSEC
 939   char *keyname; /* MAXDNAME size buffer */
 940 #endif
 941   unsigned int local_answer, queries_forwarded, auth_answer;
 942   struct frec *frec_list;
 943   struct serverfd *sfds;
 944   struct irec *interfaces;
 945   struct listener *listeners;
 946   struct server *last_server;
 947   time_t forwardtime;
 948   int forwardcount;
 949   struct server *srv_save; /* Used for resend on DoD */
 950   size_t packet_len;       /*      "        "        */
 951   struct randfd *rfd_save; /*      "        "        */
 952   pid_t tcp_pids[MAX_PROCS];
 953   struct randfd randomsocks[RANDOM_SOCKS];
 954   int v6pktinfo;
 955
 956   /* DHCP state */
 957   int dhcpfd, helperfd, pxefd;
 958 #if defined(HAVE_LINUX_NETWORK)
 959   int netlinkfd;
 960 #elif defined(HAVE_BSD_NETWORK)
 961   int dhcp_raw_fd, dhcp_icmp_fd, routefd;
 962 #endif
 963   struct iovec dhcp_packet;
 964   char *dhcp_buff, *dhcp_buff2, *dhcp_buff3;
 965   struct ping_result *ping_results;
 966   FILE *lease_stream;
 967   struct dhcp_bridge *bridges;
 968 #ifdef HAVE_DHCP6
 969   int duid_len;
 970   unsigned char *duid;
 971   struct iovec outpacket;
 972   int dhcp6fd, icmp6fd;
 973 #endif
 974   /* DBus stuff */
 975   /* void * here to avoid depending on dbus headers outside dbus.c */
 976   void *dbus;
 977 #ifdef HAVE_DBUS
 978   struct watch *watches;
 979 #endif
 980
 981   /* TFTP stuff */
 982   struct tftp_transfer *tftp_trans, *tftp_done_trans;
 983
 984   /* utility string buffer, hold max sized IP address as string */
 985   char *addrbuff;
 986
 987 } *daemon;
 988
 989 /* cache.c */
 990 void cache_init(void);
 991 void log_query(unsigned int flags, char *name, struct all_addr *addr, char *arg);
 992 char *record_source(int index);
 993 void querystr(char *desc, char *str, unsigned short type);
 994 struct crec *cache_find_by_addr(struct crec *crecp,
 995                                 struct all_addr *addr, time_t now,
 996                                 unsigned short prot);
 997 struct crec *cache_find_by_name(struct crec *crecp,
 998                                 char *name, time_t now, unsigned short  prot);
 999 void cache_end_insert(void);
1000 void cache_start_insert(void);
1001 struct crec *cache_insert(char *name, struct all_addr *addr,
1002                           time_t now, unsigned long ttl, unsigned short flags);
1003 void cache_reload(void);
1004 void cache_add_dhcp_entry(char *host_name, int prot, struct all_addr *host_address, time_t ttd);
1005 struct in_addr a_record_from_hosts(char *name, time_t now);
1006 void cache_unhash_dhcp(void);
1007 void dump_cache(time_t now);
1008 char *cache_get_name(struct crec *crecp);
1009 char *cache_get_cname_target(struct crec *crecp);
1010 struct crec *cache_enumerate(int init);
1011
1012 /* blockdata.c */
1013 #ifdef HAVE_DNSSEC
1014 void blockdata_report(void);
1015 struct blockdata *blockdata_alloc(char *data, size_t len);
1016 void *blockdata_retrieve(struct blockdata *block, size_t len, void *data);
1017 void blockdata_free(struct blockdata *blocks);
1018 #endif
1019
1020 /* domain.c */
1021 char *get_domain(struct in_addr addr);
1022 #ifdef HAVE_IPV6
1023 char *get_domain6(struct in6_addr *addr);
1024 #endif
1025 int is_name_synthetic(int flags, char *name, struct all_addr *addr);
1026 int is_rev_synth(int flag, struct all_addr *addr, char *name);
1027
1028 /* rfc1035.c */
1029 int extract_name(struct dns_header *header, size_t plen, unsigned char **pp,
1030                  char *name, int isExtract, int extrabytes);
1031 unsigned char *skip_name(unsigned char *ansp, struct dns_header *header, size_t plen, int extrabytes);
1032 unsigned char *skip_questions(struct dns_header *header, size_t plen);
1033 unsigned int extract_request(struct dns_header *header, size_t qlen,
1034                                char *name, unsigned short *typep);
1035 size_t setup_reply(struct dns_header *header, size_t  qlen,
1036                    struct all_addr *addrp, unsigned int flags,
1037                    unsigned long local_ttl);
1038 int extract_addresses(struct dns_header *header, size_t qlen, char *namebuff,
1039                       time_t now, char **ipsets, int is_sign, int checkrebind,
1040                       int no_cache, int secure, int *doctored);
1041 size_t answer_request(struct dns_header *header, char *limit, size_t qlen,
1042                    struct in_addr local_addr, struct in_addr local_netmask, time_t now);
1043 int check_for_bogus_wildcard(struct dns_header *header, size_t qlen, char *name,
1044                              struct bogus_addr *addr, time_t now);
1045 unsigned char *find_pseudoheader(struct dns_header *header, size_t plen,
1046                                  size_t *len, unsigned char **p, int *is_sign);
1047 int check_for_local_domain(char *name, time_t now);
1048 unsigned int questions_crc(struct dns_header *header, size_t plen, char *buff);
1049 size_t resize_packet(struct dns_header *header, size_t plen,
1050                   unsigned char *pheader, size_t hlen);
1051 size_t add_mac(struct dns_header *header, size_t plen, char *limit, union mysockaddr *l3);
1052 size_t add_source_addr(struct dns_header *header, size_t plen, char *limit, union mysockaddr *source);
1053 #ifdef HAVE_DNSSEC
1054 size_t add_do_bit(struct dns_header *header, size_t plen, char *limit);
1055 #endif
1056 int check_source(struct dns_header *header, size_t plen, unsigned char *pseudoheader, union mysockaddr *peer);
1057 int add_resource_record(struct dns_header *header, char *limit, int *truncp,
1058                         int nameoffset, unsigned char **pp, unsigned long ttl,
1059                         int *offset, unsigned short type, unsigned short class, char *format, ...);
1060 unsigned char *skip_questions(struct dns_header *header, size_t plen);
1061 int extract_name(struct dns_header *header, size_t plen, unsigned char **pp,
1062                  char *name, int isExtract, int extrabytes);
1063 int in_arpa_name_2_addr(char *namein, struct all_addr *addrp);
1064 int private_net(struct in_addr addr, int ban_localhost);
1065
1066 /* auth.c */
1067 #ifdef HAVE_AUTH
1068 size_t answer_auth(struct dns_header *header, char *limit, size_t qlen,
1069                    time_t now, union mysockaddr *peer_addr, int local_query);
1070 int in_zone(struct auth_zone *zone, char *name, char **cut);
1071 #endif
1072
1073 /* dnssec.c */
1074 size_t dnssec_generate_query(struct dns_header *header, char *end, char *name, int class, int type, union mysockaddr *addr);
1075 int dnssec_validate_by_ds(time_t now, struct dns_header *header, size_t n, char *name, char *keyname, int class);
1076 int dnssec_validate_ds(time_t now, struct dns_header *header, size_t plen, char *name, char *keyname, int class);
1077 int dnssec_validate_reply(time_t now, struct dns_header *header, size_t plen, char *name, char *keyname, int *class);
1078 int dnskey_keytag(int alg, int flags, unsigned char *rdata, int rdlen);
1079 unsigned char* hash_questions(struct dns_header *header, size_t plen, char *name);
1080
1081 /* util.c */
1082 void rand_init(void);
1083 unsigned short rand16(void);
1084 u64 rand64(void);
1085 int legal_hostname(char *c);
1086 char *canonicalise(char *s, int *nomem);
1087 unsigned char *do_rfc1035_name(unsigned char *p, char *sval);
1088 void *safe_malloc(size_t size);
1089 void safe_pipe(int *fd, int read_noblock);
1090 void *whine_malloc(size_t size);
1091 int sa_len(union mysockaddr *addr);
1092 int sockaddr_isequal(union mysockaddr *s1, union mysockaddr *s2);
1093 int hostname_isequal(const char *a, const char *b);
1094 time_t dnsmasq_time(void);
1095 int is_same_net(struct in_addr a, struct in_addr b, struct in_addr mask);
1096 #ifdef HAVE_IPV6
1097 int is_same_net6(struct in6_addr *a, struct in6_addr *b, int prefixlen);
1098 u64 addr6part(struct in6_addr *addr);
1099 void setaddr6part(struct in6_addr *addr, u64 host);
1100 #endif
1101 int retry_send(void);
1102 void prettyprint_time(char *buf, unsigned int t);
1103 int prettyprint_addr(union mysockaddr *addr, char *buf);
1104 int parse_hex(char *in, unsigned char *out, int maxlen,
1105               unsigned int *wildcard_mask, int *mac_type);
1106 #ifdef HAVE_DNSSEC
1107 int parse_base64(char *in, char *out);
1108 #endif
1109 int memcmp_masked(unsigned char *a, unsigned char *b, int len,
1110                   unsigned int mask);
1111 int expand_buf(struct iovec *iov, size_t size);
1112 char *print_mac(char *buff, unsigned char *mac, int len);
1113 void bump_maxfd(int fd, int *max);
1114 int read_write(int fd, unsigned char *packet, int size, int rw);
1115
1116 int wildcard_match(const char* wildcard, const char* match);
1117
1118 /* log.c */
1119 void die(char *message, char *arg1, int exit_code);
1120 int log_start(struct passwd *ent_pw, int errfd);
1121 int log_reopen(char *log_file);
1122 void my_syslog(int priority, const char *format, ...);
1123 void set_log_writer(fd_set *set, int *maxfdp);
1124 void check_log_writer(fd_set *set);
1125 void flush_log(void);
1126
1127 /* option.c */
1128 void read_opts (int argc, char **argv, char *compile_opts);
1129 char *option_string(int prot, unsigned int opt, unsigned char *val,
1130                     int opt_len, char *buf, int buf_len);
1131 void reread_dhcp(void);
1132 void set_option_bool(unsigned int opt);
1133 void reset_option_bool(unsigned int opt);
1134 struct hostsfile *expand_filelist(struct hostsfile *list);
1135 char *parse_server(char *arg, union mysockaddr *addr,
1136                    union mysockaddr *source_addr, char *interface, int *flags);
1137
1138 /* forward.c */
1139 void reply_query(int fd, int family, time_t now);
1140 void receive_query(struct listener *listen, time_t now);
1141 unsigned char *tcp_request(int confd, time_t now,
1142                            union mysockaddr *local_addr, struct in_addr netmask, int auth_dns);
1143 void server_gone(struct server *server);
1144 struct frec *get_new_frec(time_t now, int *wait, int force);
1145 int send_from(int fd, int nowild, char *packet, size_t len,
1146                union mysockaddr *to, struct all_addr *source,
1147                unsigned int iface);
1148
1149 /* network.c */
1150 int indextoname(int fd, int index, char *name);
1151 int local_bind(int fd, union mysockaddr *addr, char *intname, int is_tcp);
1152 int random_sock(int family);
1153 void pre_allocate_sfds(void);
1154 int reload_servers(char *fname);
1155 void check_servers(void);
1156 int enumerate_interfaces(int reset);
1157 void create_wildcard_listeners(void);
1158 void create_bound_listeners(int die);
1159 void warn_bound_listeners(void);
1160 void warn_int_names(void);
1161 int is_dad_listeners(void);
1162 int iface_check(int family, struct all_addr *addr, char *name, int *auth_dns);
1163 int loopback_exception(int fd, int family, struct all_addr *addr, char *name);
1164 int label_exception(int index, int family, struct all_addr *addr);
1165 int fix_fd(int fd);
1166 int tcp_interface(int fd, int af);
1167 #ifdef HAVE_IPV6
1168 int set_ipv6pktinfo(int fd);
1169 #endif
1170 #ifdef HAVE_DHCP6
1171 void join_multicast(int dienow);
1172 #endif
1173 #if defined(HAVE_LINUX_NETWORK) || defined(HAVE_BSD_NETWORK)
1174 void newaddress(time_t now);
1175 #endif
1176
1177
1178 /* dhcp.c */
1179 #ifdef HAVE_DHCP
1180 void dhcp_init(void);
1181 void dhcp_packet(time_t now, int pxe_fd);
1182 struct dhcp_context *address_available(struct dhcp_context *context,
1183                                        struct in_addr addr,
1184                                        struct dhcp_netid *netids);
1185 struct dhcp_context *narrow_context(struct dhcp_context *context,
1186                                     struct in_addr taddr,
1187                                     struct dhcp_netid *netids);
1188 int address_allocate(struct dhcp_context *context,
1189                      struct in_addr *addrp, unsigned char *hwaddr, int hw_len,
1190                      struct dhcp_netid *netids, time_t now);
1191 void dhcp_read_ethers(void);
1192 struct dhcp_config *config_find_by_address(struct dhcp_config *configs, struct in_addr addr);
1193 char *host_from_dns(struct in_addr addr);
1194 #endif
1195
1196 /* lease.c */
1197 #ifdef HAVE_DHCP
1198 void lease_update_file(time_t now);
1199 void lease_update_dns(int force);
1200 void lease_init(time_t now);
1201 struct dhcp_lease *lease4_allocate(struct in_addr addr);
1202 #ifdef HAVE_DHCP6
1203 struct dhcp_lease *lease6_allocate(struct in6_addr *addrp, int lease_type);
1204 struct dhcp_lease *lease6_find(unsigned char *clid, int clid_len,
1205                                int lease_type, int iaid, struct in6_addr *addr);
1206 void lease6_reset(void);
1207 struct dhcp_lease *lease6_find_by_client(struct dhcp_lease *first, int lease_type, unsigned char *clid, int clid_len, int iaid);
1208 struct dhcp_lease *lease6_find_by_addr(struct in6_addr *net, int prefix, u64 addr);
1209 u64 lease_find_max_addr6(struct dhcp_context *context);
1210 void lease_ping_reply(struct in6_addr *sender, unsigned char *packet, char *interface);
1211 void lease_update_slaac(time_t now);
1212 void lease_set_iaid(struct dhcp_lease *lease, int iaid);
1213 void lease_make_duid(time_t now);
1214 #endif
1215 void lease_set_hwaddr(struct dhcp_lease *lease, unsigned char *hwaddr,
1216                       unsigned char *clid, int hw_len, int hw_type, int clid_len, time_t now, int force);
1217 void lease_set_hostname(struct dhcp_lease *lease, char *name, int auth, char *domain, char *config_domain);
1218 void lease_set_expires(struct dhcp_lease *lease, unsigned int len, time_t now);
1219 void lease_set_interface(struct dhcp_lease *lease, int interface, time_t now);
1220 struct dhcp_lease *lease_find_by_client(unsigned char *hwaddr, int hw_len, int hw_type,
1221                                         unsigned char *clid, int clid_len);
1222 struct dhcp_lease *lease_find_by_addr(struct in_addr addr);
1223 struct in_addr lease_find_max_addr(struct dhcp_context *context);
1224 void lease_prune(struct dhcp_lease *target, time_t now);
1225 void lease_update_from_configs(void);
1226 int do_script_run(time_t now);
1227 void rerun_scripts(void);
1228 void lease_find_interfaces(time_t now);
1229 #ifdef HAVE_SCRIPT
1230 void lease_add_extradata(struct dhcp_lease *lease, unsigned char *data,
1231                          unsigned int len, int delim);
1232 #endif
1233 #endif
1234
1235 /* rfc2131.c */
1236 #ifdef HAVE_DHCP
1237 size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
1238                   size_t sz, time_t now, int unicast_dest, int *is_inform, int pxe_fd, struct in_addr fallback);
1239 unsigned char *extended_hwaddr(int hwtype, int hwlen, unsigned char *hwaddr,
1240                                int clid_len, unsigned char *clid, int *len_out);
1241 #endif
1242
1243 /* dnsmasq.c */
1244 #ifdef HAVE_DHCP
1245 int make_icmp_sock(void);
1246 int icmp_ping(struct in_addr addr);
1247 #endif
1248 void send_alarm(time_t event, time_t now);
1249 void send_event(int fd, int event, int data, char *msg);
1250 void clear_cache_and_reload(time_t now);
1251 void poll_resolv(int force, int do_reload, time_t now);
1252
1253 /* netlink.c */
1254 #ifdef HAVE_LINUX_NETWORK
1255 void netlink_init(void);
1256 void netlink_multicast(time_t now);
1257 #endif
1258
1259 /* bpf.c */
1260 #ifdef HAVE_BSD_NETWORK
1261 void init_bpf(void);
1262 void send_via_bpf(struct dhcp_packet *mess, size_t len,
1263                   struct in_addr iface_addr, struct ifreq *ifr);
1264 void route_init(void);
1265 void route_sock(time_t now);
1266 #endif
1267
1268 /* bpf.c or netlink.c */
1269 int iface_enumerate(int family, void *parm, int (callback)());
1270
1271 /* dbus.c */
1272 #ifdef HAVE_DBUS
1273 char *dbus_init(void);
1274 void check_dbus_listeners(fd_set *rset, fd_set *wset, fd_set *eset);
1275 void set_dbus_listeners(int *maxfdp, fd_set *rset, fd_set *wset, fd_set *eset);
1276 #  ifdef HAVE_DHCP
1277 void emit_dbus_signal(int action, struct dhcp_lease *lease, char *hostname);
1278 #  endif
1279 #endif
1280
1281 /* ipset.c */
1282 #ifdef HAVE_IPSET
1283 void ipset_init(void);
1284 int add_to_ipset(const char *setname, const struct all_addr *ipaddr, int flags, int remove);
1285 #endif
1286
1287 /* helper.c */
1288 #if defined(HAVE_SCRIPT)
1289 int create_helper(int event_fd, int err_fd, uid_t uid, gid_t gid, long max_fd);
1290 void helper_write(void);
1291 void queue_script(int action, struct dhcp_lease *lease,
1292                   char *hostname, time_t now);
1293 #ifdef HAVE_TFTP
1294 void queue_tftp(off_t file_len, char *filename, union mysockaddr *peer);
1295 #endif
1296 int helper_buf_empty(void);
1297 #endif
1298
1299 /* tftp.c */
1300 #ifdef HAVE_TFTP
1301 void tftp_request(struct listener *listen, time_t now);
1302 void check_tftp_listeners(fd_set *rset, time_t now);
1303 int do_tftp_script_run(void);
1304 #endif
1305
1306 /* conntrack.c */
1307 #ifdef HAVE_CONNTRACK
1308 int get_incoming_mark(union mysockaddr *peer_addr, struct all_addr *local_addr,
1309                       int istcp, unsigned int *markp);
1310 #endif
1311
1312 /* dhcp6.c */
1313 #ifdef HAVE_DHCP6
1314 void dhcp6_init(void);
1315 void dhcp6_packet(time_t now);
1316 struct dhcp_context *address6_allocate(struct dhcp_context *context,  unsigned char *clid, int clid_len, int temp_addr,
1317                                        int iaid, int serial, struct dhcp_netid *netids, int plain_range, struct in6_addr *ans);
1318 int config_valid(struct dhcp_config *config, struct dhcp_context *context, struct in6_addr *addr);
1319 struct dhcp_context *address6_available(struct dhcp_context *context,
1320                                         struct in6_addr *taddr,
1321                                         struct dhcp_netid *netids,
1322                                         int plain_range);
1323 struct dhcp_context *address6_valid(struct dhcp_context *context,
1324                                     struct in6_addr *taddr,
1325                                     struct dhcp_netid *netids,
1326                                     int plain_range);
1327 struct dhcp_config *config_find_by_address6(struct dhcp_config *configs, struct in6_addr *net,
1328                                             int prefix, u64 addr);
1329 void make_duid(time_t now);
1330 void dhcp_construct_contexts(time_t now);
1331 void get_client_mac(struct in6_addr *client, int iface, unsigned char *mac,
1332                     unsigned int *maclenp, unsigned int *mactypep);
1333 #endif
1334
1335 /* rfc3315.c */
1336 #ifdef HAVE_DHCP6
1337 unsigned short dhcp6_reply(struct dhcp_context *context, int interface, char *iface_name,
1338                            struct in6_addr *fallback, struct in6_addr *ll_addr, struct in6_addr *ula_addr,
1339                            size_t sz, struct in6_addr *client_addr, time_t now);
1340 void relay_upstream6(struct dhcp_relay *relay, ssize_t sz, struct in6_addr *peer_address, u32 scope_id);
1341
1342 unsigned short relay_reply6( struct sockaddr_in6 *peer, ssize_t sz, char *arrival_interface);
1343 #endif
1344
1345 /* dhcp-common.c */
1346 #ifdef HAVE_DHCP
1347 void dhcp_common_init(void);
1348 ssize_t recv_dhcp_packet(int fd, struct msghdr *msg);
1349 struct dhcp_netid *run_tag_if(struct dhcp_netid *input);
1350 struct dhcp_netid *option_filter(struct dhcp_netid *tags, struct dhcp_netid *context_tags,
1351                                  struct dhcp_opt *opts);
1352 int match_netid(struct dhcp_netid *check, struct dhcp_netid *pool, int negonly);
1353 char *strip_hostname(char *hostname);
1354 void log_tags(struct dhcp_netid *netid, u32 xid);
1355 int match_bytes(struct dhcp_opt *o, unsigned char *p, int len);
1356 void dhcp_update_configs(struct dhcp_config *configs);
1357 void display_opts(void);
1358 int lookup_dhcp_opt(int prot, char *name);
1359 int lookup_dhcp_len(int prot, int val);
1360 char *option_string(int prot, unsigned int opt, unsigned char *val,
1361                     int opt_len, char *buf, int buf_len);
1362 struct dhcp_config *find_config(struct dhcp_config *configs,
1363                                 struct dhcp_context *context,
1364                                 unsigned char *clid, int clid_len,
1365                                 unsigned char *hwaddr, int hw_len,
1366                                 int hw_type, char *hostname);
1367 int config_has_mac(struct dhcp_config *config, unsigned char *hwaddr, int len, int type);
1368 #ifdef HAVE_LINUX_NETWORK
1369 char *whichdevice(void);
1370 void bindtodevice(char *device, int fd);
1371 #endif
1372 #  ifdef HAVE_DHCP6
1373 void display_opts6(void);
1374 #  endif
1375 void log_context(int family, struct dhcp_context *context);
1376 void log_relay(int family, struct dhcp_relay *relay);
1377 #endif
1378
1379 /* outpacket.c */
1380 #ifdef HAVE_DHCP6
1381 void end_opt6(int container);
1382 int save_counter(int newval);
1383 void *expand(size_t headroom);
1384 int new_opt6(int opt);
1385 void *put_opt6(void *data, size_t len);
1386 void put_opt6_long(unsigned int val);
1387 void put_opt6_short(unsigned int val);
1388 void put_opt6_char(unsigned int val);
1389 void put_opt6_string(char *s);
1390 #endif
1391
1392 /* radv.c */
1393 #ifdef HAVE_DHCP6
1394 void ra_init(time_t now);
1395 void icmp6_packet(time_t now);
1396 time_t periodic_ra(time_t now);
1397 void ra_start_unsolicted(time_t now, struct dhcp_context *context);
1398 #endif
1399
1400 /* slaac.c */
1401 #ifdef HAVE_DHCP6
1402 void slaac_add_addrs(struct dhcp_lease *lease, time_t now, int force);
1403 time_t periodic_slaac(time_t now, struct dhcp_lease *leases);
1404 void slaac_ping_reply(struct in6_addr *sender, unsigned char *packet, char *interface, struct dhcp_lease *leases);
1405 #endif