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