src/dnsmasq.h

   1 /* dnsmasq is Copyright (c) 2000-2007 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.
   6
   7    This program is distributed in the hope that it will be useful,
   8    but WITHOUT ANY WARRANTY; without even the implied warranty of
   9    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10    GNU General Public License for more details.
  11 */
  12
  13 #define COPYRIGHT "Copyright (C) 2000-2007 Simon Kelley"
  14
  15 /* get these before config.h  for IPv6 stuff... */
  16 #include <sys/types.h>
  17 #include <netinet/in.h>
  18
  19 #ifdef __APPLE__
  20 /* need this before arpa/nameser.h */
  21 #  define BIND_8_COMPAT
  22 #endif
  23 #include <arpa/nameser.h>
  24
  25 /* and this. */
  26 #include <getopt.h>
  27
  28 #include "config.h"
  29
  30 #define gettext_noop(S) (S)
  31 #ifdef NO_GETTEXT
  32 #  define _(S) (S)
  33 #else
  34 #  include <libintl.h>
  35 #  include <locale.h>
  36 #  define _(S) gettext(S)
  37 #endif
  38
  39 #include <arpa/inet.h>
  40 #include <sys/stat.h>
  41 #include <sys/socket.h>
  42 #include <sys/ioctl.h>
  43 #include <sys/select.h>
  44 #include <sys/wait.h>
  45 #include <sys/time.h>
  46 #include <limits.h>
  47 #include <net/if.h>
  48 #include <unistd.h>
  49 #include <stdio.h>
  50 #include <string.h>
  51 #include <stdlib.h>
  52 #include <fcntl.h>
  53 #include <ctype.h>
  54 #include <signal.h>
  55 #include <time.h>
  56 #include <errno.h>
  57 #include <pwd.h>
  58 #include <grp.h>
  59 #include <stdarg.h>
  60 #if defined(__OpenBSD__) || defined(__NetBSD__)
  61 #  include <netinet/if_ether.h>
  62 #else
  63 #  include <net/ethernet.h>
  64 #endif
  65 #include <net/if_arp.h>
  66 #include <netinet/in_systm.h>
  67 #include <netinet/ip.h>
  68 #include <netinet/ip_icmp.h>
  69 #include <sys/uio.h>
  70 #include <syslog.h>
  71 #include <dirent.h>
  72 #ifndef HAVE_LINUX_NETWORK
  73 #  include <net/if_dl.h>
  74 #endif
  75
  76 #ifdef HAVE_LINUX_NETWORK
  77 #include <linux/capability.h>
  78 /* There doesn't seem to be a universally-available
  79    userpace header for this. */
  80 extern int capset(cap_user_header_t header, cap_user_data_t data);
  81 #include <sys/prctl.h>
  82 #endif
  83
  84 /* Min buffer size: we check after adding each record, so there must be
  85    memory for the largest packet, and the largest record so the
  86    min for DNS is PACKETSZ+MAXDNAME+RRFIXEDSZ which is < 1000.
  87    This might be increased is EDNS packet size if greater than the minimum.
  88 */
  89 #define DNSMASQ_PACKETSZ PACKETSZ+MAXDNAME+RRFIXEDSZ
  90
  91 #define OPT_BOGUSPRIV      (1<<0)
  92 #define OPT_FILTER         (1<<1)
  93 #define OPT_LOG            (1<<2)
  94 #define OPT_SELFMX         (1<<3)
  95 #define OPT_NO_HOSTS       (1<<4)
  96 #define OPT_NO_POLL        (1<<5)
  97 #define OPT_DEBUG          (1<<6)
  98 #define OPT_ORDER          (1<<7)
  99 #define OPT_NO_RESOLV      (1<<8)
 100 #define OPT_EXPAND         (1<<9)
 101 #define OPT_LOCALMX        (1<<10)
 102 #define OPT_NO_NEG         (1<<11)
 103 #define OPT_NODOTS_LOCAL   (1<<12)
 104 #define OPT_NOWILD         (1<<13)
 105 #define OPT_ETHERS         (1<<14)
 106 #define OPT_RESOLV_DOMAIN  (1<<15)
 107 #define OPT_NO_FORK        (1<<16)
 108 #define OPT_AUTHORITATIVE  (1<<17)
 109 #define OPT_LOCALISE       (1<<18)
 110 #define OPT_DBUS           (1<<19)
 111 #define OPT_BOOTP_DYNAMIC  (1<<20)
 112 #define OPT_NO_PING        (1<<21)
 113 #define OPT_LEASE_RO       (1<<22)
 114 #define OPT_RELOAD         (1<<24)
 115 #define OPT_TFTP           (1<<25)
 116 #define OPT_TFTP_SECURE    (1<<26)
 117
 118 struct all_addr {
 119   union {
 120     struct in_addr addr4;
 121 #ifdef HAVE_IPV6
 122     struct in6_addr addr6;
 123 #endif
 124   } addr;
 125 };
 126
 127 struct bogus_addr {
 128   struct in_addr addr;
 129   struct bogus_addr *next;
 130 };
 131
 132 /* dns doctor param */
 133 struct doctor {
 134   struct in_addr in, out, mask;
 135   struct doctor *next;
 136 };
 137
 138 struct mx_srv_record {
 139   char *name, *target;
 140   int issrv, srvport, priority, weight;
 141   unsigned int offset;
 142   struct mx_srv_record *next;
 143 };
 144
 145 struct txt_record {
 146   char *name, *txt;
 147   unsigned short class, len;
 148   struct txt_record *next;
 149 };
 150
 151 struct ptr_record {
 152   char *name, *ptr;
 153   struct ptr_record *next;
 154 };
 155
 156 union bigname {
 157   char name[MAXDNAME];
 158   union bigname *next; /* freelist */
 159 };
 160
 161 struct crec {
 162   struct crec *next, *prev, *hash_next;
 163   time_t ttd; /* time to die */
 164   int uid;
 165   union {
 166     struct all_addr addr;
 167     struct {
 168       struct crec *cache;
 169       int uid;
 170     } cname;
 171   } addr;
 172   unsigned short flags;
 173   union {
 174     char sname[SMALLDNAME];
 175     union bigname *bname;
 176     char *namep;
 177   } name;
 178 };
 179
 180 #define F_IMMORTAL  1
 181 #define F_CONFIG    2
 182 #define F_REVERSE   4
 183 #define F_FORWARD   8
 184 #define F_DHCP      16
 185 #define F_NEG       32
 186 #define F_HOSTS     64
 187 #define F_IPV4      128
 188 #define F_IPV6      256
 189 #define F_BIGNAME   512
 190 #define F_UPSTREAM  1024
 191 #define F_SERVER    2048
 192 #define F_NXDOMAIN  4096
 193 #define F_QUERY     8192
 194 #define F_CNAME     16384
 195 #define F_NOERR     32768
 196
 197 /* struct sockaddr is not large enough to hold any address,
 198    and specifically not big enough to hold an IPv6 address.
 199    Blech. Roll our own. */
 200 union mysockaddr {
 201   struct sockaddr sa;
 202   struct sockaddr_in in;
 203 #ifdef HAVE_BROKEN_SOCKADDR_IN6
 204   /* early versions of glibc don't include sin6_scope_id in sockaddr_in6
 205      but latest kernels _require_ it to be set. The choice is to have
 206      dnsmasq fail to compile on back-level libc or fail to run
 207      on latest kernels with IPv6. Or to do this: sorry that it's so gross. */
 208   struct my_sockaddr_in6 {
 209     sa_family_t     sin6_family;    /* AF_INET6 */
 210     uint16_t        sin6_port;      /* transport layer port # */
 211     uint32_t        sin6_flowinfo;  /* IPv6 traffic class & flow info */
 212     struct in6_addr sin6_addr;      /* IPv6 address */
 213     uint32_t        sin6_scope_id;  /* set of interfaces for a scope */
 214   } in6;
 215 #elif defined(HAVE_IPV6)
 216   struct sockaddr_in6 in6;
 217 #endif
 218 };
 219
 220 #define SERV_FROM_RESOLV       1  /* 1 for servers from resolv, 0 for command line. */
 221 #define SERV_NO_ADDR           2  /* no server, this domain is local only */
 222 #define SERV_LITERAL_ADDRESS   4  /* addr is the answer, not the server */
 223 #define SERV_HAS_SOURCE        8  /* source address specified */
 224 #define SERV_HAS_DOMAIN       16  /* server for one domain only */
 225 #define SERV_FOR_NODOTS       32  /* server for names with no domain part only */
 226 #define SERV_WARNED_RECURSIVE 64  /* avoid warning spam */
 227 #define SERV_FROM_DBUS       128  /* 1 if source is DBus */
 228 #define SERV_MARK            256  /* for mark-and-delete */
 229 #define SERV_TYPE    (SERV_HAS_DOMAIN | SERV_FOR_NODOTS)
 230
 231
 232 struct serverfd {
 233   int fd;
 234   union mysockaddr source_addr;
 235   struct serverfd *next;
 236 };
 237
 238 struct server {
 239   union mysockaddr addr, source_addr;
 240   struct serverfd *sfd;
 241   char *domain; /* set if this server only handles a domain. */
 242   int flags, tcpfd;
 243   struct server *next;
 244 };
 245
 246 struct irec {
 247   union mysockaddr addr;
 248   struct in_addr netmask; /* only valid for IPv4 */
 249   int dhcp_ok;
 250   struct irec *next;
 251 };
 252
 253 struct listener {
 254   int fd, tcpfd, tftpfd, family;
 255   struct irec *iface; /* only valid for non-wildcard */
 256   struct listener *next;
 257 };
 258
 259 /* interface and address parms from command line. */
 260 struct iname {
 261   char *name;
 262   union mysockaddr addr;
 263   int isloop, used;
 264   struct iname *next;
 265 };
 266
 267 /* resolv-file parms from command-line */
 268 struct resolvc {
 269   struct resolvc *next;
 270   int is_default, logged;
 271   time_t mtime;
 272   char *name;
 273 };
 274
 275 /* adn-hosts parms from command-line */
 276 struct hostsfile {
 277   struct hostsfile *next;
 278   char *fname;
 279   int index; /* matches to cache entries for logging */
 280 };
 281
 282 struct frec {
 283   union mysockaddr source;
 284   struct all_addr dest;
 285   struct server *sentto; /* NULL means free */
 286   unsigned int iface;
 287   unsigned short orig_id, new_id;
 288   int fd, forwardall;
 289   unsigned int crc;
 290   time_t time;
 291   struct frec *next;
 292 };
 293
 294 /* actions in the daemon->helper RPC */
 295 #define ACTION_DEL           1
 296 #define ACTION_OLD_HOSTNAME  2
 297 #define ACTION_OLD           3
 298 #define ACTION_ADD           4
 299
 300 #define DHCP_CHADDR_MAX 16
 301
 302 struct dhcp_lease {
 303   int clid_len;          /* length of client identifier */
 304   unsigned char *clid;   /* clientid */
 305   char *hostname, *fqdn; /* name from client-hostname option or config */
 306   char *old_hostname;    /* hostname before it moved to another lease */
 307   char auth_name;        /* hostname came from config, not from client */
 308   char new;              /* newly created */
 309   char changed;          /* modified */
 310   char aux_changed;      /* CLID or expiry changed */
 311   time_t expires;        /* lease expiry */
 312 #ifdef HAVE_BROKEN_RTC
 313   unsigned int length;
 314 #endif
 315   int hwaddr_len, hwaddr_type;
 316   unsigned char hwaddr[DHCP_CHADDR_MAX];
 317   struct in_addr addr;
 318   unsigned char *vendorclass, *userclass;
 319   unsigned int vendorclass_len, userclass_len;
 320   struct dhcp_lease *next;
 321 };
 322
 323 struct dhcp_netid {
 324   char *net;
 325   struct dhcp_netid *next;
 326 };
 327
 328 struct dhcp_netid_list {
 329   struct dhcp_netid *list;
 330   struct dhcp_netid_list *next;
 331 };
 332
 333 struct dhcp_config {
 334   unsigned int flags;
 335   int clid_len;          /* length of client identifier */
 336   unsigned char *clid;   /* clientid */
 337   int hwaddr_len, hwaddr_type;
 338   unsigned char hwaddr[DHCP_CHADDR_MAX];
 339   char *hostname;
 340   struct dhcp_netid netid;
 341   struct in_addr addr;
 342   time_t decline_time;
 343   unsigned int lease_time, wildcard_mask;
 344   struct dhcp_config *next;
 345 };
 346
 347 #define CONFIG_DISABLE           1
 348 #define CONFIG_CLID              2
 349 #define CONFIG_HWADDR            4
 350 #define CONFIG_TIME              8
 351 #define CONFIG_NAME             16
 352 #define CONFIG_ADDR             32
 353 #define CONFIG_NETID            64
 354 #define CONFIG_NOCLID          128
 355 #define CONFIG_FROM_ETHERS     256    /* entry created by /etc/ethers */
 356 #define CONFIG_ADDR_HOSTS      512    /* address added by from /etc/hosts */
 357 #define CONFIG_DECLINED       1024    /* address declined by client */
 358
 359 struct dhcp_opt {
 360   int opt, len, flags;
 361   unsigned char *val, *vendor_class;
 362   struct dhcp_netid *netid;
 363   struct dhcp_opt *next;
 364 };
 365
 366 #define DHOPT_ADDR               1
 367 #define DHOPT_STRING             2
 368 #define DHOPT_VENDOR_MATCH       4
 369
 370 struct dhcp_boot {
 371   char *file, *sname;
 372   struct in_addr next_server;
 373   struct dhcp_netid *netid;
 374   struct dhcp_boot *next;
 375 };
 376
 377 struct dhcp_vendor {
 378   int len, is_vendor;
 379   char *data;
 380   struct dhcp_netid netid;
 381   struct dhcp_vendor *next;
 382 };
 383
 384 struct dhcp_mac {
 385   unsigned int mask;
 386   int hwaddr_len, hwaddr_type;
 387   unsigned char hwaddr[DHCP_CHADDR_MAX];
 388   struct dhcp_netid netid;
 389   struct dhcp_mac *next;
 390 };
 391
 392 #if defined(__FreeBSD__) || defined(__DragonFly__)
 393 struct dhcp_bridge {
 394   char iface[IF_NAMESIZE];
 395   struct dhcp_bridge *alias, *next;
 396 };
 397 #endif
 398
 399 struct dhcp_context {
 400   unsigned int lease_time, addr_epoch;
 401   struct in_addr netmask, broadcast;
 402   struct in_addr local, router;
 403   struct in_addr start, end; /* range of available addresses */
 404   int flags;
 405   struct dhcp_netid netid, *filter;
 406   struct dhcp_context *next, *current;
 407 };
 408
 409 #define CONTEXT_STATIC    1
 410 #define CONTEXT_NETMASK   2
 411 #define CONTEXT_BRDCAST   4
 412
 413
 414 typedef unsigned char u8;
 415 typedef unsigned short u16;
 416 typedef unsigned int u32;
 417
 418
 419 struct dhcp_packet {
 420   u8 op, htype, hlen, hops;
 421   u32 xid;
 422   u16 secs, flags;
 423   struct in_addr ciaddr, yiaddr, siaddr, giaddr;
 424   u8 chaddr[DHCP_CHADDR_MAX], sname[64], file[128];
 425   u8 options[312];
 426 };
 427
 428 struct ping_result {
 429   struct in_addr addr;
 430   time_t time;
 431   struct ping_result *next;
 432 };
 433
 434 struct tftp_file {
 435   int refcount, fd;
 436   off_t size;
 437   char filename[];
 438 };
 439
 440 struct tftp_transfer {
 441   int sockfd;
 442   time_t timeout;
 443   int backoff;
 444   unsigned int block, blocksize;
 445   struct sockaddr_in peer;
 446   char opt_blocksize, opt_transize;
 447   struct tftp_file *file;
 448   struct tftp_transfer *next;
 449 };
 450
 451 struct daemon {
 452   /* datastuctures representing the command-line and
 453      config file arguments. All set (including defaults)
 454      in option.c */
 455
 456   unsigned int options;
 457   struct resolvc default_resolv, *resolv_files;
 458   struct mx_srv_record *mxnames;
 459   struct txt_record *txt;
 460   struct ptr_record *ptr;
 461   char *mxtarget;
 462   char *lease_file;
 463   char *username, *groupname;
 464   char *domain_suffix;
 465   char *runfile;
 466   char *lease_change_command;
 467   struct iname *if_names, *if_addrs, *if_except, *dhcp_except;
 468   struct bogus_addr *bogus_addr;
 469   struct server *servers;
 470   int log_fac; /* log facility */
 471   int cachesize, ftabsize;
 472   int port, query_port;
 473   unsigned long local_ttl;
 474   struct hostsfile *addn_hosts;
 475   struct dhcp_context *dhcp;
 476   struct dhcp_config *dhcp_conf;
 477   struct dhcp_opt *dhcp_opts, *vendor_opts;
 478   struct dhcp_vendor *dhcp_vendors;
 479   struct dhcp_mac *dhcp_macs;
 480   struct dhcp_boot *boot_config;
 481   struct dhcp_netid_list *dhcp_ignore, *dhcp_ignore_names;
 482   int dhcp_max, tftp_max;
 483   unsigned int min_leasetime;
 484   struct doctor *doctors;
 485   unsigned short edns_pktsz;
 486
 487   /* globally used stuff for DNS */
 488   char *packet; /* packet buffer */
 489   int packet_buff_sz; /* size of above */
 490   char *namebuff; /* MAXDNAME size buffer */
 491   struct serverfd *sfds;
 492   struct irec *interfaces;
 493   struct listener *listeners;
 494   struct server *last_server;
 495   struct server *srv_save; /* Used for resend on DoD */
 496   size_t packet_len;       /*      "        "        */
 497   pid_t tcp_pids[MAX_PROCS];
 498
 499   /* DHCP state */
 500   int dhcpfd, helperfd;
 501 #ifdef HAVE_LINUX_NETWORK
 502   int netlinkfd;
 503 #else
 504   int dhcp_raw_fd, dhcp_icmp_fd;
 505 #endif
 506   struct iovec dhcp_packet;
 507   char *dhcp_buff, *dhcp_buff2;
 508   struct ping_result *ping_results;
 509   FILE *lease_stream;
 510 #if defined(__FreeBSD__) || defined(__DragonFly__)
 511   struct dhcp_bridge *bridges;
 512 #endif
 513
 514   /* DBus stuff */
 515   /* void * here to avoid depending on dbus headers outside dbus.c */
 516   void *dbus;
 517 #ifdef HAVE_DBUS
 518   struct watch *watches;
 519 #endif
 520
 521   /* TFTP stuff */
 522   struct tftp_transfer *tftp_trans;
 523   char *tftp_prefix;
 524 };
 525
 526 /* cache.c */
 527 void cache_init(int cachesize, int log);
 528 void log_query(unsigned short flags, char *name, struct all_addr *addr,
 529                unsigned short type, struct hostsfile *addn_hosts, int index);
 530 struct crec *cache_find_by_addr(struct crec *crecp,
 531                                 struct all_addr *addr, time_t now,
 532                                 unsigned short prot);
 533 struct crec *cache_find_by_name(struct crec *crecp,
 534                                 char *name, time_t now, unsigned short  prot);
 535 void cache_end_insert(void);
 536 void cache_start_insert(void);
 537 struct crec *cache_insert(char *name, struct all_addr *addr,
 538                           time_t now, unsigned long ttl, unsigned short flags);
 539 void cache_reload(int opts, char *buff, char *domain_suffix, struct hostsfile  *addn_hosts);
 540 void cache_add_dhcp_entry(struct daemon *daemon, char *host_name, struct in_addr *host_address, time_t ttd);
 541 void cache_unhash_dhcp(void);
 542 void dump_cache(struct daemon *daemon, time_t now);
 543 char *cache_get_name(struct crec *crecp);
 544
 545 /* rfc1035.c */
 546 unsigned short extract_request(HEADER *header, size_t qlen,
 547                                char *name, unsigned short *typep);
 548 size_t setup_reply(HEADER *header, size_t  qlen,
 549                    struct all_addr *addrp, unsigned short flags,
 550                    unsigned long local_ttl);
 551 void extract_addresses(HEADER *header, size_t qlen, char *namebuff,
 552                        time_t now, struct daemon *daemon);
 553 size_t answer_request(HEADER *header, char *limit, size_t qlen, struct daemon *daemon,
 554                    struct in_addr local_addr, struct in_addr local_netmask, time_t now);
 555 int check_for_bogus_wildcard(HEADER *header, size_t qlen, char *name,
 556                              struct bogus_addr *addr, time_t now);
 557 unsigned char *find_pseudoheader(HEADER *header, size_t plen,
 558                                  size_t *len, unsigned char **p, int *is_sign);
 559 int check_for_local_domain(char *name, time_t now, struct daemon *daemon);
 560 unsigned int questions_crc(HEADER *header, size_t plen, char *buff);
 561 size_t resize_packet(HEADER *header, size_t plen,
 562                   unsigned char *pheader, size_t hlen);
 563
 564 /* util.c */
 565 unsigned short rand16(void);
 566 int legal_char(char c);
 567 int canonicalise(char *s);
 568 unsigned char *do_rfc1035_name(unsigned char *p, char *sval);
 569 void die(char *message, char *arg1);
 570 void complain(char *message, int lineno, char *file);
 571 void *safe_malloc(size_t size);
 572 int sa_len(union mysockaddr *addr);
 573 int sockaddr_isequal(union mysockaddr *s1, union mysockaddr *s2);
 574 int hostname_isequal(char *a, char *b);
 575 time_t dnsmasq_time(void);
 576 int is_same_net(struct in_addr a, struct in_addr b, struct in_addr mask);
 577 int retry_send(void);
 578 void prettyprint_time(char *buf, unsigned int t);
 579 int prettyprint_addr(union mysockaddr *addr, char *buf);
 580 int parse_hex(char *in, unsigned char *out, int maxlen,
 581               unsigned int *wildcard_mask, int *mac_type);
 582 int memcmp_masked(unsigned char *a, unsigned char *b, int len,
 583                   unsigned int mask);
 584 int expand_buf(struct iovec *iov, size_t size);
 585 char *print_mac(struct daemon *daemon, unsigned char *mac, int len);
 586 void bump_maxfd(int fd, int *max);
 587 void log_start(struct daemon *daemon);
 588 int read_write(int fd, unsigned char *packet, int size, int rw);
 589
 590 /* option.c */
 591 struct daemon *read_opts (int argc, char **argv, char *compile_opts);
 592
 593 /* forward.c */
 594 void reply_query(struct serverfd *sfd, struct daemon *daemon, time_t now);
 595 void receive_query(struct listener *listen, struct daemon *daemon, time_t now);
 596 unsigned char *tcp_request(struct daemon *daemon, int confd, time_t now,
 597                            struct in_addr local_addr, struct in_addr netmask);
 598 void server_gone(struct daemon *daemon, struct server *server);
 599 struct frec *get_new_frec(struct daemon *daemon, time_t now, int *wait);
 600
 601 /* network.c */
 602 struct serverfd *allocate_sfd(union mysockaddr *addr, struct serverfd **sfds);
 603 int reload_servers(char *fname, struct daemon *daemon);
 604 void check_servers(struct daemon *daemon);
 605 int enumerate_interfaces(struct daemon *daemon);
 606 struct listener *create_wildcard_listeners(int port, int have_tftp);
 607 struct listener *create_bound_listeners(struct daemon *daemon);
 608 int iface_check(struct daemon *daemon, int family, struct all_addr *addr,
 609                 struct ifreq *ifr, int *indexp);
 610 int fix_fd(int fd);
 611
 612 /* dhcp.c */
 613 void dhcp_init(struct daemon *daemon);
 614 void dhcp_packet(struct daemon *daemon, time_t now);
 615
 616 struct dhcp_context *address_available(struct dhcp_context *context, struct in_addr addr);
 617 struct dhcp_context *narrow_context(struct dhcp_context *context, struct in_addr taddr);
 618 int match_netid(struct dhcp_netid *check, struct dhcp_netid *pool, int negonly);
 619 int address_allocate(struct dhcp_context *context, struct daemon *daemon,
 620                      struct in_addr *addrp, unsigned char *hwaddr, int hw_len,
 621                      struct dhcp_netid *netids, time_t now);
 622 struct dhcp_config *find_config(struct dhcp_config *configs,
 623                                 struct dhcp_context *context,
 624                                 unsigned char *clid, int clid_len,
 625                                 unsigned char *hwaddr, int hw_len,
 626                                 int hw_type, char *hostname);
 627 void dhcp_update_configs(struct dhcp_config *configs);
 628 void dhcp_read_ethers(struct daemon *daemon);
 629 struct dhcp_config *config_find_by_address(struct dhcp_config *configs, struct in_addr addr);
 630 char *strip_hostname(struct daemon *daemon, char *hostname);
 631 char *host_from_dns(struct daemon *daemon, struct in_addr addr);
 632
 633 /* lease.c */
 634 void lease_update_file(struct daemon *daemon, time_t now);
 635 void lease_update_dns(struct daemon *daemon);
 636 void lease_init(struct daemon *daemon, time_t now);
 637 struct dhcp_lease *lease_allocate(struct in_addr addr);
 638 void lease_set_hwaddr(struct dhcp_lease *lease, unsigned char *hwaddr,
 639                       unsigned char *clid, int hw_len, int hw_type, int clid_len);
 640 void lease_set_hostname(struct dhcp_lease *lease, char *name,
 641                         char *suffix, int auth);
 642 void lease_set_expires(struct dhcp_lease *lease, unsigned int len, time_t now);
 643 struct dhcp_lease *lease_find_by_client(unsigned char *hwaddr, int hw_len, int hw_type,
 644                                         unsigned char *clid, int clid_len);
 645 struct dhcp_lease *lease_find_by_addr(struct in_addr addr);
 646 void lease_prune(struct dhcp_lease *target, time_t now);
 647 void lease_update_from_configs(struct daemon *daemon);
 648 int do_script_run(struct daemon *daemon);
 649
 650 /* rfc2131.c */
 651 size_t dhcp_reply(struct daemon *daemon, struct dhcp_context *context, char *iface_name, size_t sz, time_t now, int unicast_dest);
 652
 653 /* dnsmasq.c */
 654 int make_icmp_sock(void);
 655 int icmp_ping(struct daemon *daemon, struct in_addr addr);
 656 void clear_cache_and_reload(struct daemon *daemon, time_t now);
 657
 658 /* isc.c */
 659 #ifdef HAVE_ISC_READER
 660 void load_dhcp(struct daemon *daemon, time_t now);
 661 #endif
 662
 663 /* netlink.c */
 664 #ifdef HAVE_LINUX_NETWORK
 665 void netlink_init(struct daemon *daemon);
 666 int iface_enumerate(struct daemon *daemon, void *parm,
 667                     int (*ipv4_callback)(), int (*ipv6_callback)());
 668 void netlink_multicast(struct daemon *daemon);
 669 #endif
 670
 671 /* bpf.c */
 672 #ifndef HAVE_LINUX_NETWORK
 673 void init_bpf(struct daemon *daemon);
 674 void send_via_bpf(struct daemon *daemon, struct dhcp_packet *mess, size_t len,
 675                   struct in_addr iface_addr, struct ifreq *ifr);
 676 int iface_enumerate(struct daemon *daemon, void *parm,
 677                     int (*ipv4_callback)(), int (*ipv6_callback)());
 678 #endif
 679
 680 /* dbus.c */
 681 #ifdef HAVE_DBUS
 682 char *dbus_init(struct daemon *daemon);
 683 void check_dbus_listeners(struct daemon *daemon,
 684                           fd_set *rset, fd_set *wset, fd_set *eset);
 685 void set_dbus_listeners(struct daemon *daemon, int *maxfdp,
 686                         fd_set *rset, fd_set *wset, fd_set *eset);
 687 #endif
 688
 689 /* helper.c */
 690 int create_helper(struct daemon *daemon);
 691 void helper_write(struct daemon *daemon);
 692 void queue_script(struct daemon *daemon, int action,
 693                   struct dhcp_lease *lease, char *hostname);
 694 int helper_buf_empty(void);
 695
 696 /* tftp.c */
 697 #ifdef HAVE_TFTP
 698 void tftp_request(struct listener *listen, struct daemon *daemon, time_t now);
 699 void check_tftp_listeners(struct daemon *daemon, fd_set *rset, time_t now);
 700 #endif