1/* dnsmasq is Copyright (c) 2000-2015 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) 2000-2015 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 55typedef unsigned char u8; 56typedef unsigned short u16; 57typedef unsigned int u32; 58typedef 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/poll.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#include <utime.h> 121#ifndef HAVE_LINUX_NETWORK 122# include <net/if_dl.h> 123#endif 124 125#if defined(HAVE_LINUX_NETWORK) 126#include <linux/capability.h> 127/* There doesn't seem to be a universally-available 128 userpace header for these. */ 129extern int capset(cap_user_header_t header, cap_user_data_t data); 130extern int capget(cap_user_header_t header, cap_user_data_t data); 131#define LINUX_CAPABILITY_VERSION_1 0x19980330 132#define LINUX_CAPABILITY_VERSION_2 0x20071026 133#define LINUX_CAPABILITY_VERSION_3 0x20080522 134 135#include <sys/prctl.h> 136#elif defined(HAVE_SOLARIS_NETWORK) 137#include <priv.h> 138#endif 139 140/* daemon is function in the C library.... */ 141#define daemon dnsmasq_daemon 142 143/* Async event queue */ 144struct event_desc { 145 int event, data, msg_sz; 146}; 147 148#define EVENT_RELOAD 1 149#define EVENT_DUMP 2 150#define EVENT_ALARM 3 151#define EVENT_TERM 4 152#define EVENT_CHILD 5 153#define EVENT_REOPEN 6 154#define EVENT_EXITED 7 155#define EVENT_KILLED 8 156#define EVENT_EXEC_ERR 9 157#define EVENT_PIPE_ERR 10 158#define EVENT_USER_ERR 11 159#define EVENT_CAP_ERR 12 160#define EVENT_PIDFILE 13 161#define EVENT_HUSER_ERR 14 162#define EVENT_GROUP_ERR 15 163#define EVENT_DIE 16 164#define EVENT_LOG_ERR 17 165#define EVENT_FORK_ERR 18 166#define EVENT_LUA_ERR 19 167#define EVENT_TFTP_ERR 20 168#define EVENT_INIT 21 169#define EVENT_NEWADDR 22 170#define EVENT_NEWROUTE 23 171#define EVENT_TIME_ERR 24 172 173/* Exit codes. */ 174#define EC_GOOD 0 175#define EC_BADCONF 1 176#define EC_BADNET 2 177#define EC_FILE 3 178#define EC_NOMEM 4 179#define EC_MISC 5 180#define EC_INIT_OFFSET 10 181 182/* Min buffer size: we check after adding each record, so there must be 183 memory for the largest packet, and the largest record so the 184 min for DNS is PACKETSZ+MAXDNAME+RRFIXEDSZ which is < 1000. 185 This might be increased is EDNS packet size if greater than the minimum. 186*/ 187#define DNSMASQ_PACKETSZ PACKETSZ+MAXDNAME+RRFIXEDSZ 188 189/* Trust the compiler dead-code eliminator.... */ 190#define option_bool(x) (((x) < 32) ? daemon->options & (1u << (x)) : daemon->options2 & (1u << ((x) - 32))) 191 192#define OPT_BOGUSPRIV 0 193#define OPT_FILTER 1 194#define OPT_LOG 2 195#define OPT_SELFMX 3 196#define OPT_NO_HOSTS 4 197#define OPT_NO_POLL 5 198#define OPT_DEBUG 6 199#define OPT_ORDER 7 200#define OPT_NO_RESOLV 8 201#define OPT_EXPAND 9 202#define OPT_LOCALMX 10 203#define OPT_NO_NEG 11 204#define OPT_NODOTS_LOCAL 12 205#define OPT_NOWILD 13 206#define OPT_ETHERS 14 207#define OPT_RESOLV_DOMAIN 15 208#define OPT_NO_FORK 16 209#define OPT_AUTHORITATIVE 17 210#define OPT_LOCALISE 18 211#define OPT_DBUS 19 212#define OPT_DHCP_FQDN 20 213#define OPT_NO_PING 21 214#define OPT_LEASE_RO 22 215#define OPT_ALL_SERVERS 23 216#define OPT_RELOAD 24 217#define OPT_LOCAL_REBIND 25 218#define OPT_TFTP_SECURE 26 219#define OPT_TFTP_NOBLOCK 27 220#define OPT_LOG_OPTS 28 221#define OPT_TFTP_APREF 29 222#define OPT_NO_OVERRIDE 30 223#define OPT_NO_REBIND 31 224#define OPT_ADD_MAC 32 225#define OPT_DNSSEC_PROXY 33 226#define OPT_CONSEC_ADDR 34 227#define OPT_CONNTRACK 35 228#define OPT_FQDN_UPDATE 36 229#define OPT_RA 37 230#define OPT_TFTP_LC 38 231#define OPT_CLEVERBIND 39 232#define OPT_TFTP 40 233#define OPT_CLIENT_SUBNET 41 234#define OPT_QUIET_DHCP 42 235#define OPT_QUIET_DHCP6 43 236#define OPT_QUIET_RA 44 237#define OPT_DNSSEC_VALID 45 238#define OPT_DNSSEC_TIME 46 239#define OPT_DNSSEC_DEBUG 47 240#define OPT_DNSSEC_NO_SIGN 48 241#define OPT_LOCAL_SERVICE 49 242#define OPT_LOOP_DETECT 50 243#define OPT_EXTRALOG 51 244#define OPT_TFTP_NO_FAIL 52 245#define OPT_LAST 53 246 247/* extra flags for my_syslog, we use a couple of facilities since they are known 248 not to occupy the same bits as priorities, no matter how syslog.h is set up. */ 249#define MS_TFTP LOG_USER 250#define MS_DHCP LOG_DAEMON 251 252struct all_addr { 253 union { 254 struct in_addr addr4; 255#ifdef HAVE_IPV6 256 struct in6_addr addr6; 257#endif 258 /* for log_query */ 259 unsigned int keytag; 260 /* for cache_insert if RRSIG, DNSKEY, DS */ 261 struct { 262 unsigned short class, type; 263 } dnssec; 264 } addr; 265}; 266 267struct bogus_addr { 268 struct in_addr addr; 269 struct bogus_addr *next; 270}; 271 272/* dns doctor param */ 273struct doctor { 274 struct in_addr in, end, out, mask; 275 struct doctor *next; 276}; 277 278struct mx_srv_record { 279 char *name, *target; 280 int issrv, srvport, priority, weight; 281 unsigned int offset; 282 struct mx_srv_record *next; 283}; 284 285struct naptr { 286 char *name, *replace, *regexp, *services, *flags; 287 unsigned int order, pref; 288 struct naptr *next; 289}; 290 291#define TXT_STAT_CACHESIZE 1 292#define TXT_STAT_INSERTS 2 293#define TXT_STAT_EVICTIONS 3 294#define TXT_STAT_MISSES 4 295#define TXT_STAT_HITS 5 296#define TXT_STAT_AUTH 6 297#define TXT_STAT_SERVERS 7 298 299struct txt_record { 300 char *name; 301 unsigned char *txt; 302 unsigned short class, len; 303 int stat; 304 struct txt_record *next; 305}; 306 307struct ptr_record { 308 char *name, *ptr; 309 struct ptr_record *next; 310}; 311 312struct cname { 313 char *alias, *target; 314 struct cname *next; 315}; 316 317struct ds_config { 318 char *name, *digest; 319 int digestlen, class, algo, keytag, digest_type; 320 struct ds_config *next; 321}; 322 323#define ADDRLIST_LITERAL 1 324#define ADDRLIST_IPV6 2 325#define ADDRLIST_REVONLY 4 326 327struct addrlist { 328 struct all_addr addr; 329 int flags, prefixlen; 330 struct addrlist *next; 331}; 332 333#define AUTH6 1 334#define AUTH4 2 335 336struct auth_zone { 337 char *domain; 338 struct auth_name_list { 339 char *name; 340 int flags; 341 struct auth_name_list *next; 342 } *interface_names; 343 struct addrlist *subnet; 344 struct auth_zone *next; 345}; 346 347 348struct host_record { 349 struct name_list { 350 char *name; 351 struct name_list *next; 352 } *names; 353 struct in_addr addr; 354#ifdef HAVE_IPV6 355 struct in6_addr addr6; 356#endif 357 struct host_record *next; 358}; 359 360struct interface_name { 361 char *name; /* domain name */ 362 char *intr; /* interface name */ 363 int family; /* AF_INET, AF_INET6 or zero for both */ 364 struct addrlist *addr; 365 struct interface_name *next; 366}; 367 368union bigname { 369 char name[MAXDNAME]; 370 union bigname *next; /* freelist */ 371}; 372 373struct blockdata { 374 struct blockdata *next; 375 unsigned char key[KEYBLOCK_LEN]; 376}; 377 378struct crec { 379 struct crec *next, *prev, *hash_next; 380 /* union is 16 bytes when doing IPv6, 8 bytes on 32 bit machines without IPv6 */ 381 union { 382 struct all_addr addr; 383 struct { 384 union { 385 struct crec *cache; 386 struct interface_name *int_name; 387 } target; 388 unsigned int uid; /* 0 if union is interface-name */ 389 } cname; 390 struct { 391 struct blockdata *keydata; 392 unsigned short keylen, flags, keytag; 393 unsigned char algo; 394 } key; 395 struct { 396 struct blockdata *keydata; 397 unsigned short keylen, keytag; 398 unsigned char algo; 399 unsigned char digest; 400 } ds; 401 struct { 402 struct blockdata *keydata; 403 unsigned short keylen, type_covered, keytag; 404 char algo; 405 } sig; 406 } addr; 407 time_t ttd; /* time to die */ 408 /* used as class if DNSKEY/DS/RRSIG, index to source for F_HOSTS */ 409 unsigned int uid; 410 unsigned short flags; 411 union { 412 char sname[SMALLDNAME]; 413 union bigname *bname; 414 char *namep; 415 } name; 416}; 417 418#define F_IMMORTAL (1u<<0) 419#define F_NAMEP (1u<<1) 420#define F_REVERSE (1u<<2) 421#define F_FORWARD (1u<<3) 422#define F_DHCP (1u<<4) 423#define F_NEG (1u<<5) 424#define F_HOSTS (1u<<6) 425#define F_IPV4 (1u<<7) 426#define F_IPV6 (1u<<8) 427#define F_BIGNAME (1u<<9) 428#define F_NXDOMAIN (1u<<10) 429#define F_CNAME (1u<<11) 430#define F_DNSKEY (1u<<12) 431#define F_CONFIG (1u<<13) 432#define F_DS (1u<<14) 433#define F_DNSSECOK (1u<<15) 434 435/* below here are only valid as args to log_query: cache 436 entries are limited to 16 bits */ 437#define F_UPSTREAM (1u<<16) 438#define F_RRNAME (1u<<17) 439#define F_SERVER (1u<<18) 440#define F_QUERY (1u<<19) 441#define F_NOERR (1u<<20) 442#define F_AUTH (1u<<21) 443#define F_DNSSEC (1u<<22) 444#define F_KEYTAG (1u<<23) 445#define F_SECSTAT (1u<<24) 446#define F_NO_RR (1u<<25) 447#define F_IPSET (1u<<26) 448#define F_NSIGMATCH (1u<<27) 449#define F_NOEXTRA (1u<<28) 450 451/* Values of uid in crecs with F_CONFIG bit set. */ 452#define SRC_INTERFACE 0 453#define SRC_CONFIG 1 454#define SRC_HOSTS 2 455#define SRC_AH 3 456 457 458/* struct sockaddr is not large enough to hold any address, 459 and specifically not big enough to hold an IPv6 address. 460 Blech. Roll our own. */ 461union mysockaddr { 462 struct sockaddr sa; 463 struct sockaddr_in in; 464#if defined(HAVE_IPV6) 465 struct sockaddr_in6 in6; 466#endif 467}; 468 469/* bits in flag param to IPv6 callbacks from iface_enumerate() */ 470#define IFACE_TENTATIVE 1 471#define IFACE_DEPRECATED 2 472#define IFACE_PERMANENT 4 473 474 475#define SERV_FROM_RESOLV 1 /* 1 for servers from resolv, 0 for command line. */ 476#define SERV_NO_ADDR 2 /* no server, this domain is local only */ 477#define SERV_LITERAL_ADDRESS 4 /* addr is the answer, not the server */ 478#define SERV_HAS_DOMAIN 8 /* server for one domain only */ 479#define SERV_HAS_SOURCE 16 /* source address defined */ 480#define SERV_FOR_NODOTS 32 /* server for names with no domain part only */ 481#define SERV_WARNED_RECURSIVE 64 /* avoid warning spam */ 482#define SERV_FROM_DBUS 128 /* 1 if source is DBus */ 483#define SERV_MARK 256 /* for mark-and-delete */ 484#define SERV_TYPE (SERV_HAS_DOMAIN | SERV_FOR_NODOTS) 485#define SERV_COUNTED 512 /* workspace for log code */ 486#define SERV_USE_RESOLV 1024 /* forward this domain in the normal way */ 487#define SERV_NO_REBIND 2048 /* inhibit dns-rebind protection */ 488#define SERV_FROM_FILE 4096 /* read from --servers-file */ 489#define SERV_LOOP 8192 /* server causes forwarding loop */ 490 491struct serverfd { 492 int fd; 493 union mysockaddr source_addr; 494 char interface[IF_NAMESIZE+1]; 495 struct serverfd *next; 496}; 497 498struct randfd { 499 int fd; 500 unsigned short refcount, family; 501}; 502 503struct server { 504 union mysockaddr addr, source_addr; 505 char interface[IF_NAMESIZE+1]; 506 struct serverfd *sfd; 507 char *domain; /* set if this server only handles a domain. */ 508 int flags, tcpfd, edns_pktsz; 509 unsigned int queries, failed_queries; 510#ifdef HAVE_LOOP 511 u32 uid; 512#endif 513 struct server *next; 514}; 515 516struct ipsets { 517 char **sets; 518 char *domain; 519 struct ipsets *next; 520}; 521 522struct irec { 523 union mysockaddr addr; 524 struct in_addr netmask; /* only valid for IPv4 */ 525 int tftp_ok, dhcp_ok, mtu, done, warned, dad, dns_auth, index, multicast_done, found; 526 char *name; 527 struct irec *next; 528}; 529 530struct listener { 531 int fd, tcpfd, tftpfd, family; 532 struct irec *iface; /* only sometimes valid for non-wildcard */ 533 struct listener *next; 534}; 535 536/* interface and address parms from command line. */ 537struct iname { 538 char *name; 539 union mysockaddr addr; 540 int used; 541 struct iname *next; 542}; 543 544/* subnet parameters from command line */ 545struct mysubnet { 546 union mysockaddr addr; 547 int addr_used; 548 int mask; 549}; 550 551/* resolv-file parms from command-line */ 552struct resolvc { 553 struct resolvc *next; 554 int is_default, logged; 555 time_t mtime; 556 char *name; 557#ifdef HAVE_INOTIFY 558 int wd; /* inotify watch descriptor */ 559 char *file; /* pointer to file part if path */ 560#endif 561}; 562 563/* adn-hosts parms from command-line (also dhcp-hostsfile and dhcp-optsfile and dhcp-hostsdir*/ 564#define AH_DIR 1 565#define AH_INACTIVE 2 566#define AH_WD_DONE 4 567#define AH_HOSTS 8 568#define AH_DHCP_HST 16 569#define AH_DHCP_OPT 32 570struct hostsfile { 571 struct hostsfile *next; 572 int flags; 573 char *fname; 574#ifdef HAVE_INOTIFY 575 int wd; /* inotify watch descriptor */ 576#endif 577 unsigned int index; /* matches to cache entries for logging */ 578}; 579 580 581/* DNSSEC status values. */ 582#define STAT_SECURE 1 583#define STAT_INSECURE 2 584#define STAT_BOGUS 3 585#define STAT_NEED_DS 4 586#define STAT_NEED_KEY 5 587#define STAT_TRUNCATED 6 588#define STAT_SECURE_WILDCARD 7 589#define STAT_NO_SIG 8 590#define STAT_NO_DS 9 591#define STAT_NO_NS 10 592#define STAT_NEED_DS_NEG 11 593#define STAT_CHASE_CNAME 12 594#define STAT_INSECURE_DS 13 595 596#define FREC_NOREBIND 1 597#define FREC_CHECKING_DISABLED 2 598#define FREC_HAS_SUBNET 4 599#define FREC_DNSKEY_QUERY 8 600#define FREC_DS_QUERY 16 601#define FREC_AD_QUESTION 32 602#define FREC_DO_QUESTION 64 603#define FREC_ADDED_PHEADER 128 604#define FREC_CHECK_NOSIGN 256 605#define FREC_TEST_PKTSZ 512 606 607#ifdef HAVE_DNSSEC 608#define HASH_SIZE 20 /* SHA-1 digest size */ 609#else 610#define HASH_SIZE sizeof(int) 611#endif 612 613struct frec { 614 union mysockaddr source; 615 struct all_addr dest; 616 struct server *sentto; /* NULL means free */ 617 struct randfd *rfd4; 618#ifdef HAVE_IPV6 619 struct randfd *rfd6; 620#endif 621 unsigned int iface; 622 unsigned short orig_id, new_id; 623 int log_id, fd, forwardall, flags; 624 time_t time; 625 unsigned char *hash[HASH_SIZE]; 626#ifdef HAVE_DNSSEC 627 int class, work_counter; 628 struct blockdata *stash; /* Saved reply, whilst we validate */ 629 struct blockdata *orig_domain; /* domain of original query, whilst 630 we're seeing is if in unsigned domain */ 631 size_t stash_len, name_start, name_len; 632 struct frec *dependent; /* Query awaiting internally-generated DNSKEY or DS query */ 633 struct frec *blocking_query; /* Query which is blocking us. */ 634#endif 635 struct frec *next; 636}; 637 638/* flags in top of length field for DHCP-option tables */ 639#define OT_ADDR_LIST 0x8000 640#define OT_RFC1035_NAME 0x4000 641#define OT_INTERNAL 0x2000 642#define OT_NAME 0x1000 643#define OT_CSTRING 0x0800 644#define OT_DEC 0x0400 645#define OT_TIME 0x0200 646 647/* actions in the daemon->helper RPC */ 648#define ACTION_DEL 1 649#define ACTION_OLD_HOSTNAME 2 650#define ACTION_OLD 3 651#define ACTION_ADD 4 652#define ACTION_TFTP 5 653 654#define LEASE_NEW 1 /* newly created */ 655#define LEASE_CHANGED 2 /* modified */ 656#define LEASE_AUX_CHANGED 4 /* CLID or expiry changed */ 657#define LEASE_AUTH_NAME 8 /* hostname came from config, not from client */ 658#define LEASE_USED 16 /* used this DHCPv6 transaction */ 659#define LEASE_NA 32 /* IPv6 no-temporary lease */ 660#define LEASE_TA 64 /* IPv6 temporary lease */ 661#define LEASE_HAVE_HWADDR 128 /* Have set hwaddress */ 662 663struct dhcp_lease { 664 int clid_len; /* length of client identifier */ 665 unsigned char *clid; /* clientid */ 666 char *hostname, *fqdn; /* name from client-hostname option or config */ 667 char *old_hostname; /* hostname before it moved to another lease */ 668 int flags; 669 time_t expires; /* lease expiry */ 670#ifdef HAVE_BROKEN_RTC 671 unsigned int length; 672#endif 673 int hwaddr_len, hwaddr_type; 674 unsigned char hwaddr[DHCP_CHADDR_MAX]; 675 struct in_addr addr, override, giaddr; 676 unsigned char *extradata; 677 unsigned int extradata_len, extradata_size; 678 int last_interface; 679 int new_interface; /* save possible originated interface */ 680 int new_prefixlen; /* and its prefix length */ 681#ifdef HAVE_DHCP6 682 struct in6_addr addr6; 683 int iaid; 684 struct slaac_address { 685 struct in6_addr addr; 686 time_t ping_time; 687 int backoff; /* zero -> confirmed */ 688 struct slaac_address *next; 689 } *slaac_address; 690 int vendorclass_count; 691#endif 692 struct dhcp_lease *next; 693}; 694 695struct dhcp_netid { 696 char *net; 697 struct dhcp_netid *next; 698}; 699 700struct dhcp_netid_list { 701 struct dhcp_netid *list; 702 struct dhcp_netid_list *next; 703}; 704 705struct tag_if { 706 struct dhcp_netid_list *set; 707 struct dhcp_netid *tag; 708 struct tag_if *next; 709}; 710 711struct hwaddr_config { 712 int hwaddr_len, hwaddr_type; 713 unsigned char hwaddr[DHCP_CHADDR_MAX]; 714 unsigned int wildcard_mask; 715 struct hwaddr_config *next; 716}; 717 718struct dhcp_config { 719 unsigned int flags; 720 int clid_len; /* length of client identifier */ 721 unsigned char *clid; /* clientid */ 722 char *hostname, *domain; 723 struct dhcp_netid_list *netid; 724#ifdef HAVE_DHCP6 725 struct in6_addr addr6; 726#endif 727 struct in_addr addr; 728 time_t decline_time; 729 unsigned int lease_time; 730 struct hwaddr_config *hwaddr; 731 struct dhcp_config *next; 732}; 733 734#define have_config(config, mask) ((config) && ((config)->flags & (mask))) 735 736#define CONFIG_DISABLE 1 737#define CONFIG_CLID 2 738#define CONFIG_TIME 8 739#define CONFIG_NAME 16 740#define CONFIG_ADDR 32 741#define CONFIG_NOCLID 128 742#define CONFIG_FROM_ETHERS 256 /* entry created by /etc/ethers */ 743#define CONFIG_ADDR_HOSTS 512 /* address added by from /etc/hosts */ 744#define CONFIG_DECLINED 1024 /* address declined by client */ 745#define CONFIG_BANK 2048 /* from dhcp hosts file */ 746#define CONFIG_ADDR6 4096 747#define CONFIG_WILDCARD 8192 748 749struct dhcp_opt { 750 int opt, len, flags; 751 union { 752 int encap; 753 unsigned int wildcard_mask; 754 unsigned char *vendor_class; 755 } u; 756 unsigned char *val; 757 struct dhcp_netid *netid; 758 struct dhcp_opt *next; 759}; 760 761#define DHOPT_ADDR 1 762#define DHOPT_STRING 2 763#define DHOPT_ENCAPSULATE 4 764#define DHOPT_ENCAP_MATCH 8 765#define DHOPT_FORCE 16 766#define DHOPT_BANK 32 767#define DHOPT_ENCAP_DONE 64 768#define DHOPT_MATCH 128 769#define DHOPT_VENDOR 256 770#define DHOPT_HEX 512 771#define DHOPT_VENDOR_MATCH 1024 772#define DHOPT_RFC3925 2048 773#define DHOPT_TAGOK 4096 774#define DHOPT_ADDR6 8192 775 776struct dhcp_boot { 777 char *file, *sname, *tftp_sname; 778 struct in_addr next_server; 779 struct dhcp_netid *netid; 780 struct dhcp_boot *next; 781}; 782 783struct pxe_service { 784 unsigned short CSA, type; 785 char *menu, *basename, *sname; 786 struct in_addr server; 787 struct dhcp_netid *netid; 788 struct pxe_service *next; 789}; 790 791#define MATCH_VENDOR 1 792#define MATCH_USER 2 793#define MATCH_CIRCUIT 3 794#define MATCH_REMOTE 4 795#define MATCH_SUBSCRIBER 5 796 797/* vendorclass, userclass, remote-id or cicuit-id */ 798struct dhcp_vendor { 799 int len, match_type; 800 unsigned int enterprise; 801 char *data; 802 struct dhcp_netid netid; 803 struct dhcp_vendor *next; 804}; 805 806struct dhcp_mac { 807 unsigned int mask; 808 int hwaddr_len, hwaddr_type; 809 unsigned char hwaddr[DHCP_CHADDR_MAX]; 810 struct dhcp_netid netid; 811 struct dhcp_mac *next; 812}; 813 814struct dhcp_bridge { 815 char iface[IF_NAMESIZE]; 816 struct dhcp_bridge *alias, *next; 817}; 818 819struct cond_domain { 820 char *domain, *prefix; 821 struct in_addr start, end; 822#ifdef HAVE_IPV6 823 struct in6_addr start6, end6; 824#endif 825 int is6; 826 struct cond_domain *next; 827}; 828 829#ifdef OPTION6_PREFIX_CLASS 830struct prefix_class { 831 int class; 832 struct dhcp_netid tag; 833 struct prefix_class *next; 834}; 835#endif 836 837struct ra_interface { 838 char *name; 839 int interval, lifetime, prio; 840 struct ra_interface *next; 841}; 842 843struct dhcp_context { 844 unsigned int lease_time, addr_epoch; 845 struct in_addr netmask, broadcast; 846 struct in_addr local, router; 847 struct in_addr start, end; /* range of available addresses */ 848#ifdef HAVE_DHCP6 849 struct in6_addr start6, end6; /* range of available addresses */ 850 struct in6_addr local6; 851 int prefix, if_index; 852 unsigned int valid, preferred, saved_valid; 853 time_t ra_time, ra_short_period_start, address_lost_time; 854 char *template_interface; 855#endif 856 int flags; 857 struct dhcp_netid netid, *filter; 858 struct dhcp_context *next, *current; 859}; 860 861#define CONTEXT_STATIC (1u<<0) 862#define CONTEXT_NETMASK (1u<<1) 863#define CONTEXT_BRDCAST (1u<<2) 864#define CONTEXT_PROXY (1u<<3) 865#define CONTEXT_RA_ROUTER (1u<<4) 866#define CONTEXT_RA_DONE (1u<<5) 867#define CONTEXT_RA_NAME (1u<<6) 868#define CONTEXT_RA_STATELESS (1u<<7) 869#define CONTEXT_DHCP (1u<<8) 870#define CONTEXT_DEPRECATE (1u<<9) 871#define CONTEXT_TEMPLATE (1u<<10) /* create contexts using addresses */ 872#define CONTEXT_CONSTRUCTED (1u<<11) 873#define CONTEXT_GC (1u<<12) 874#define CONTEXT_RA (1u<<13) 875#define CONTEXT_CONF_USED (1u<<14) 876#define CONTEXT_USED (1u<<15) 877#define CONTEXT_OLD (1u<<16) 878#define CONTEXT_V6 (1u<<17) 879#define CONTEXT_RA_OFF_LINK (1u<<18) 880 881struct ping_result { 882 struct in_addr addr; 883 time_t time; 884 unsigned int hash; 885 struct ping_result *next; 886}; 887 888struct tftp_file { 889 int refcount, fd; 890 off_t size; 891 dev_t dev; 892 ino_t inode; 893 char filename[]; 894}; 895 896struct tftp_transfer { 897 int sockfd; 898 time_t timeout; 899 int backoff; 900 unsigned int block, blocksize, expansion; 901 off_t offset; 902 union mysockaddr peer; 903 char opt_blocksize, opt_transize, netascii, carrylf; 904 struct tftp_file *file; 905 struct tftp_transfer *next; 906}; 907 908struct addr_list { 909 struct in_addr addr; 910 struct addr_list *next; 911}; 912 913struct tftp_prefix { 914 char *interface; 915 char *prefix; 916 int missing; 917 struct tftp_prefix *next; 918}; 919 920struct dhcp_relay { 921 struct all_addr local, server; 922 char *interface; /* Allowable interface for replies from server, and dest for IPv6 multicast */ 923 int iface_index; /* working - interface in which requests arrived, for return */ 924 struct dhcp_relay *current, *next; 925}; 926 927extern struct daemon { 928 /* datastuctures representing the command-line and 929 config file arguments. All set (including defaults) 930 in option.c */ 931 932 unsigned int options, options2; 933 struct resolvc default_resolv, *resolv_files; 934 time_t last_resolv; 935 char *servers_file; 936 struct mx_srv_record *mxnames; 937 struct naptr *naptr; 938 struct txt_record *txt, *rr; 939 struct ptr_record *ptr; 940 struct host_record *host_records, *host_records_tail; 941 struct cname *cnames; 942 struct auth_zone *auth_zones; 943 struct interface_name *int_names; 944 char *mxtarget; 945 struct mysubnet *add_subnet4; 946 struct mysubnet *add_subnet6; 947 char *lease_file; 948 char *username, *groupname, *scriptuser; 949 char *luascript; 950 char *authserver, *hostmaster; 951 struct iname *authinterface; 952 struct name_list *secondary_forward_server; 953 int group_set, osport; 954 char *domain_suffix; 955 struct cond_domain *cond_domain, *synth_domains; 956 char *runfile; 957 char *lease_change_command; 958 struct iname *if_names, *if_addrs, *if_except, *dhcp_except, *auth_peers, *tftp_interfaces; 959 struct bogus_addr *bogus_addr, *ignore_addr; 960 struct server *servers; 961 struct ipsets *ipsets; 962 int log_fac; /* log facility */ 963 char *log_file; /* optional log file */ 964 int max_logs; /* queue limit */ 965 int cachesize, ftabsize; 966 int port, query_port, min_port; 967 unsigned long local_ttl, neg_ttl, max_ttl, min_cache_ttl, max_cache_ttl, auth_ttl; 968 struct hostsfile *addn_hosts; 969 struct dhcp_context *dhcp, *dhcp6; 970 struct ra_interface *ra_interfaces; 971 struct dhcp_config *dhcp_conf; 972 struct dhcp_opt *dhcp_opts, *dhcp_match, *dhcp_opts6, *dhcp_match6; 973 struct dhcp_vendor *dhcp_vendors; 974 struct dhcp_mac *dhcp_macs; 975 struct dhcp_boot *boot_config; 976 struct pxe_service *pxe_services; 977 struct tag_if *tag_if; 978 struct addr_list *override_relays; 979 struct dhcp_relay *relay4, *relay6; 980 int override; 981 int enable_pxe; 982 int doing_ra, doing_dhcp6; 983 struct dhcp_netid_list *dhcp_ignore, *dhcp_ignore_names, *dhcp_gen_names; 984 struct dhcp_netid_list *force_broadcast, *bootp_dynamic; 985 struct hostsfile *dhcp_hosts_file, *dhcp_opts_file, *dynamic_dirs; 986 int dhcp_max, tftp_max; 987 int dhcp_server_port, dhcp_client_port; 988 int start_tftp_port, end_tftp_port; 989 unsigned int min_leasetime; 990 struct doctor *doctors; 991 unsigned short edns_pktsz; 992 char *tftp_prefix; 993 struct tftp_prefix *if_prefix; /* per-interface TFTP prefixes */ 994 unsigned int duid_enterprise, duid_config_len; 995 unsigned char *duid_config; 996 char *dbus_name; 997 unsigned long soa_sn, soa_refresh, soa_retry, soa_expiry; 998#ifdef OPTION6_PREFIX_CLASS 999 struct prefix_class *prefix_classes; 1000#endif 1001#ifdef HAVE_DNSSEC 1002 struct ds_config *ds; 1003 int back_to_the_future; 1004 char *timestamp_file; 1005#endif 1006 1007 /* globally used stuff for DNS */ 1008 char *packet; /* packet buffer */ 1009 int packet_buff_sz; /* size of above */ 1010 char *namebuff; /* MAXDNAME size buffer */ 1011#ifdef HAVE_DNSSEC 1012 char *keyname; /* MAXDNAME size buffer */ 1013 char *workspacename; /* ditto */ 1014#endif 1015 unsigned int local_answer, queries_forwarded, auth_answer; 1016 struct frec *frec_list; 1017 struct serverfd *sfds; 1018 struct irec *interfaces; 1019 struct listener *listeners; 1020 struct server *last_server; 1021 time_t forwardtime; 1022 int forwardcount; 1023 struct server *srv_save; /* Used for resend on DoD */ 1024 size_t packet_len; /* " " */ 1025 struct randfd *rfd_save; /* " " */ 1026 pid_t tcp_pids[MAX_PROCS]; 1027 struct randfd randomsocks[RANDOM_SOCKS]; 1028 int v6pktinfo; 1029 struct addrlist *interface_addrs; /* list of all addresses/prefix lengths associated with all local interfaces */ 1030 int log_id, log_display_id; /* ids of transactions for logging */ 1031 union mysockaddr *log_source_addr; 1032 1033 /* DHCP state */ 1034 int dhcpfd, helperfd, pxefd; 1035#ifdef HAVE_INOTIFY 1036 int inotifyfd; 1037#endif 1038#if defined(HAVE_LINUX_NETWORK) 1039 int netlinkfd; 1040#elif defined(HAVE_BSD_NETWORK) 1041 int dhcp_raw_fd, dhcp_icmp_fd, routefd; 1042#endif 1043 struct iovec dhcp_packet; 1044 char *dhcp_buff, *dhcp_buff2, *dhcp_buff3; 1045 struct ping_result *ping_results; 1046 FILE *lease_stream; 1047 struct dhcp_bridge *bridges; 1048#ifdef HAVE_DHCP6 1049 int duid_len; 1050 unsigned char *duid; 1051 struct iovec outpacket; 1052 int dhcp6fd, icmp6fd; 1053#endif 1054 /* DBus stuff */ 1055 /* void * here to avoid depending on dbus headers outside dbus.c */ 1056 void *dbus; 1057#ifdef HAVE_DBUS 1058 struct watch *watches; 1059#endif 1060 1061 /* TFTP stuff */ 1062 struct tftp_transfer *tftp_trans, *tftp_done_trans; 1063 1064 /* utility string buffer, hold max sized IP address as string */ 1065 char *addrbuff; 1066 char *addrbuff2; /* only allocated when OPT_EXTRALOG */ 1067 1068} *daemon; 1069 1070/* cache.c */ 1071void cache_init(void); 1072void log_query(unsigned int flags, char *name, struct all_addr *addr, char *arg); 1073char *record_source(unsigned int index); 1074char *querystr(char *desc, unsigned short type); 1075struct crec *cache_find_by_addr(struct crec *crecp, 1076 struct all_addr *addr, time_t now, 1077 unsigned int prot); 1078struct crec *cache_find_by_name(struct crec *crecp, 1079 char *name, time_t now, unsigned int prot); 1080void cache_end_insert(void); 1081void cache_start_insert(void); 1082struct crec *cache_insert(char *name, struct all_addr *addr, 1083 time_t now, unsigned long ttl, unsigned short flags); 1084void cache_reload(void); 1085void cache_add_dhcp_entry(char *host_name, int prot, struct all_addr *host_address, time_t ttd); 1086struct in_addr a_record_from_hosts(char *name, time_t now); 1087void cache_unhash_dhcp(void); 1088void dump_cache(time_t now); 1089int cache_make_stat(struct txt_record *t); 1090char *cache_get_name(struct crec *crecp); 1091char *cache_get_cname_target(struct crec *crecp); 1092struct crec *cache_enumerate(int init); 1093int read_hostsfile(char *filename, unsigned int index, int cache_size, 1094 struct crec **rhash, int hashsz); 1095 1096/* blockdata.c */ 1097#ifdef HAVE_DNSSEC 1098void blockdata_init(void); 1099void blockdata_report(void); 1100struct blockdata *blockdata_alloc(char *data, size_t len); 1101void *blockdata_retrieve(struct blockdata *block, size_t len, void *data); 1102void blockdata_free(struct blockdata *blocks); 1103#endif 1104 1105/* domain.c */ 1106char *get_domain(struct in_addr addr); 1107#ifdef HAVE_IPV6 1108char *get_domain6(struct in6_addr *addr); 1109#endif 1110int is_name_synthetic(int flags, char *name, struct all_addr *addr); 1111int is_rev_synth(int flag, struct all_addr *addr, char *name); 1112 1113/* rfc1035.c */ 1114int extract_name(struct dns_header *header, size_t plen, unsigned char **pp, 1115 char *name, int isExtract, int extrabytes); 1116unsigned char *skip_name(unsigned char *ansp, struct dns_header *header, size_t plen, int extrabytes); 1117unsigned char *skip_questions(struct dns_header *header, size_t plen); 1118unsigned char *skip_section(unsigned char *ansp, int count, struct dns_header *header, size_t plen); 1119unsigned int extract_request(struct dns_header *header, size_t qlen, 1120 char *name, unsigned short *typep); 1121size_t setup_reply(struct dns_header *header, size_t qlen, 1122 struct all_addr *addrp, unsigned int flags, 1123 unsigned long local_ttl); 1124int extract_addresses(struct dns_header *header, size_t qlen, char *namebuff, 1125 time_t now, char **ipsets, int is_sign, int checkrebind, 1126 int no_cache, int secure, int *doctored); 1127size_t answer_request(struct dns_header *header, char *limit, size_t qlen, 1128 struct in_addr local_addr, struct in_addr local_netmask, 1129 time_t now, int *ad_reqd, int *do_bit); 1130int check_for_bogus_wildcard(struct dns_header *header, size_t qlen, char *name, 1131 struct bogus_addr *addr, time_t now); 1132int check_for_ignored_address(struct dns_header *header, size_t qlen, struct bogus_addr *baddr); 1133unsigned char *find_pseudoheader(struct dns_header *header, size_t plen, 1134 size_t *len, unsigned char **p, int *is_sign); 1135int check_for_local_domain(char *name, time_t now); 1136unsigned int questions_crc(struct dns_header *header, size_t plen, char *buff); 1137size_t resize_packet(struct dns_header *header, size_t plen, 1138 unsigned char *pheader, size_t hlen); 1139size_t add_mac(struct dns_header *header, size_t plen, char *limit, union mysockaddr *l3); 1140size_t add_source_addr(struct dns_header *header, size_t plen, char *limit, union mysockaddr *source); 1141#ifdef HAVE_DNSSEC 1142size_t add_do_bit(struct dns_header *header, size_t plen, char *limit); 1143#endif 1144int check_source(struct dns_header *header, size_t plen, unsigned char *pseudoheader, union mysockaddr *peer); 1145int add_resource_record(struct dns_header *header, char *limit, int *truncp, 1146 int nameoffset, unsigned char **pp, unsigned long ttl, 1147 int *offset, unsigned short type, unsigned short class, char *format, ...); 1148unsigned char *skip_questions(struct dns_header *header, size_t plen); 1149int extract_name(struct dns_header *header, size_t plen, unsigned char **pp, 1150 char *name, int isExtract, int extrabytes); 1151int in_arpa_name_2_addr(char *namein, struct all_addr *addrp); 1152int private_net(struct in_addr addr, int ban_localhost); 1153 1154/* auth.c */ 1155#ifdef HAVE_AUTH 1156size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, 1157 time_t now, union mysockaddr *peer_addr, int local_query); 1158int in_zone(struct auth_zone *zone, char *name, char **cut); 1159#endif 1160 1161/* dnssec.c */ 1162size_t dnssec_generate_query(struct dns_header *header, char *end, char *name, int class, int type, union mysockaddr *addr, int edns_pktsz); 1163int dnssec_validate_by_ds(time_t now, struct dns_header *header, size_t n, char *name, char *keyname, int class); 1164int dnssec_validate_ds(time_t now, struct dns_header *header, size_t plen, char *name, char *keyname, int class); 1165int dnssec_validate_reply(time_t now, struct dns_header *header, size_t plen, char *name, char *keyname, int *class, int *neganswer, int *nons); 1166int dnssec_chase_cname(time_t now, struct dns_header *header, size_t plen, char *name, char *keyname); 1167int dnskey_keytag(int alg, int flags, unsigned char *rdata, int rdlen); 1168size_t filter_rrsigs(struct dns_header *header, size_t plen); 1169unsigned char* hash_questions(struct dns_header *header, size_t plen, char *name); 1170int setup_timestamp(void); 1171 1172/* util.c */ 1173void rand_init(void); 1174unsigned short rand16(void); 1175u32 rand32(void); 1176u64 rand64(void); 1177int legal_hostname(char *c); 1178char *canonicalise(char *s, int *nomem); 1179unsigned char *do_rfc1035_name(unsigned char *p, char *sval); 1180void *safe_malloc(size_t size); 1181void safe_pipe(int *fd, int read_noblock); 1182void *whine_malloc(size_t size); 1183int sa_len(union mysockaddr *addr); 1184int sockaddr_isequal(union mysockaddr *s1, union mysockaddr *s2); 1185int hostname_isequal(const char *a, const char *b); 1186time_t dnsmasq_time(void); 1187int netmask_length(struct in_addr mask); 1188int is_same_net(struct in_addr a, struct in_addr b, struct in_addr mask); 1189#ifdef HAVE_IPV6 1190int is_same_net6(struct in6_addr *a, struct in6_addr *b, int prefixlen); 1191u64 addr6part(struct in6_addr *addr); 1192void setaddr6part(struct in6_addr *addr, u64 host); 1193#endif 1194int retry_send(ssize_t rc); 1195void prettyprint_time(char *buf, unsigned int t); 1196int prettyprint_addr(union mysockaddr *addr, char *buf); 1197int parse_hex(char *in, unsigned char *out, int maxlen, 1198 unsigned int *wildcard_mask, int *mac_type); 1199int memcmp_masked(unsigned char *a, unsigned char *b, int len, 1200 unsigned int mask); 1201int expand_buf(struct iovec *iov, size_t size); 1202char *print_mac(char *buff, unsigned char *mac, int len); 1203int read_write(int fd, unsigned char *packet, int size, int rw); 1204 1205int wildcard_match(const char* wildcard, const char* match); 1206int wildcard_matchn(const char* wildcard, const char* match, int num); 1207 1208/* log.c */ 1209void die(char *message, char *arg1, int exit_code); 1210int log_start(struct passwd *ent_pw, int errfd); 1211int log_reopen(char *log_file); 1212void my_syslog(int priority, const char *format, ...); 1213void set_log_writer(void); 1214void check_log_writer(int force); 1215void flush_log(void); 1216 1217/* option.c */ 1218void read_opts (int argc, char **argv, char *compile_opts); 1219char *option_string(int prot, unsigned int opt, unsigned char *val, 1220 int opt_len, char *buf, int buf_len); 1221void reread_dhcp(void); 1222void read_servers_file(void); 1223void set_option_bool(unsigned int opt); 1224void reset_option_bool(unsigned int opt); 1225struct hostsfile *expand_filelist(struct hostsfile *list); 1226char *parse_server(char *arg, union mysockaddr *addr, 1227 union mysockaddr *source_addr, char *interface, int *flags); 1228int option_read_dynfile(char *file, int flags); 1229 1230/* forward.c */ 1231void reply_query(int fd, int family, time_t now); 1232void receive_query(struct listener *listen, time_t now); 1233unsigned char *tcp_request(int confd, time_t now, 1234 union mysockaddr *local_addr, struct in_addr netmask, int auth_dns); 1235void server_gone(struct server *server); 1236struct frec *get_new_frec(time_t now, int *wait, int force); 1237int send_from(int fd, int nowild, char *packet, size_t len, 1238 union mysockaddr *to, struct all_addr *source, 1239 unsigned int iface); 1240void resend_query(); 1241struct randfd *allocate_rfd(int family); 1242void free_rfd(struct randfd *rfd); 1243 1244/* network.c */ 1245int indextoname(int fd, int index, char *name); 1246int local_bind(int fd, union mysockaddr *addr, char *intname, int is_tcp); 1247int random_sock(int family); 1248void pre_allocate_sfds(void); 1249int reload_servers(char *fname); 1250void mark_servers(int flag); 1251void cleanup_servers(void); 1252void add_update_server(int flags, 1253 union mysockaddr *addr, 1254 union mysockaddr *source_addr, 1255 const char *interface, 1256 const char *domain); 1257void check_servers(void); 1258int enumerate_interfaces(int reset); 1259void create_wildcard_listeners(void); 1260void create_bound_listeners(int die); 1261void warn_bound_listeners(void); 1262void warn_int_names(void); 1263int is_dad_listeners(void); 1264int iface_check(int family, struct all_addr *addr, char *name, int *auth_dns); 1265int loopback_exception(int fd, int family, struct all_addr *addr, char *name); 1266int label_exception(int index, int family, struct all_addr *addr); 1267int fix_fd(int fd); 1268int tcp_interface(int fd, int af); 1269#ifdef HAVE_IPV6 1270int set_ipv6pktinfo(int fd); 1271#endif 1272#ifdef HAVE_DHCP6 1273void join_multicast(int dienow); 1274#endif 1275#if defined(HAVE_LINUX_NETWORK) || defined(HAVE_BSD_NETWORK) 1276void newaddress(time_t now); 1277#endif 1278 1279 1280/* dhcp.c */ 1281#ifdef HAVE_DHCP 1282void dhcp_init(void); 1283void dhcp_packet(time_t now, int pxe_fd); 1284struct dhcp_context *address_available(struct dhcp_context *context, 1285 struct in_addr addr, 1286 struct dhcp_netid *netids); 1287struct dhcp_context *narrow_context(struct dhcp_context *context, 1288 struct in_addr taddr, 1289 struct dhcp_netid *netids); 1290int address_allocate(struct dhcp_context *context, 1291 struct in_addr *addrp, unsigned char *hwaddr, int hw_len, 1292 struct dhcp_netid *netids, time_t now); 1293void dhcp_read_ethers(void); 1294struct dhcp_config *config_find_by_address(struct dhcp_config *configs, struct in_addr addr); 1295char *host_from_dns(struct in_addr addr); 1296#endif 1297 1298/* lease.c */ 1299#ifdef HAVE_DHCP 1300#ifdef HAVE_LEASEFILE_EXPIRE 1301void lease_flush_file(time_t now); 1302#endif 1303void lease_update_file(time_t now); 1304void lease_update_dns(int force); 1305void lease_init(time_t now); 1306struct dhcp_lease *lease4_allocate(struct in_addr addr); 1307#ifdef HAVE_DHCP6 1308struct dhcp_lease *lease6_allocate(struct in6_addr *addrp, int lease_type); 1309struct dhcp_lease *lease6_find(unsigned char *clid, int clid_len, 1310 int lease_type, int iaid, struct in6_addr *addr); 1311void lease6_reset(void); 1312struct dhcp_lease *lease6_find_by_client(struct dhcp_lease *first, int lease_type, unsigned char *clid, int clid_len, int iaid); 1313struct dhcp_lease *lease6_find_by_addr(struct in6_addr *net, int prefix, u64 addr); 1314u64 lease_find_max_addr6(struct dhcp_context *context); 1315void lease_ping_reply(struct in6_addr *sender, unsigned char *packet, char *interface); 1316void lease_update_slaac(time_t now); 1317void lease_set_iaid(struct dhcp_lease *lease, int iaid); 1318void lease_make_duid(time_t now); 1319#endif 1320void lease_set_hwaddr(struct dhcp_lease *lease, const unsigned char *hwaddr, 1321 const unsigned char *clid, int hw_len, int hw_type, 1322 int clid_len, time_t now, int force); 1323void lease_set_hostname(struct dhcp_lease *lease, const char *name, int auth, char *domain, char *config_domain); 1324void lease_set_expires(struct dhcp_lease *lease, unsigned int len, time_t now); 1325void lease_set_interface(struct dhcp_lease *lease, int interface, time_t now); 1326struct dhcp_lease *lease_find_by_client(unsigned char *hwaddr, int hw_len, int hw_type, 1327 unsigned char *clid, int clid_len); 1328struct dhcp_lease *lease_find_by_addr(struct in_addr addr); 1329struct in_addr lease_find_max_addr(struct dhcp_context *context); 1330void lease_prune(struct dhcp_lease *target, time_t now); 1331void lease_update_from_configs(void); 1332int do_script_run(time_t now); 1333void rerun_scripts(void); 1334void lease_find_interfaces(time_t now); 1335#ifdef HAVE_SCRIPT 1336void lease_add_extradata(struct dhcp_lease *lease, unsigned char *data, 1337 unsigned int len, int delim); 1338#endif 1339#endif 1340 1341/* rfc2131.c */ 1342#ifdef HAVE_DHCP 1343size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index, 1344 size_t sz, time_t now, int unicast_dest, int *is_inform, int pxe_fd, struct in_addr fallback); 1345unsigned char *extended_hwaddr(int hwtype, int hwlen, unsigned char *hwaddr, 1346 int clid_len, unsigned char *clid, int *len_out); 1347#endif 1348 1349/* dnsmasq.c */ 1350#ifdef HAVE_DHCP 1351int make_icmp_sock(void); 1352int icmp_ping(struct in_addr addr); 1353#endif 1354void queue_event(int event); 1355void send_alarm(time_t event, time_t now); 1356void send_event(int fd, int event, int data, char *msg); 1357void clear_cache_and_reload(time_t now); 1358 1359/* netlink.c */ 1360#ifdef HAVE_LINUX_NETWORK 1361void netlink_init(void); 1362void netlink_multicast(void); 1363#endif 1364 1365/* bpf.c */ 1366#ifdef HAVE_BSD_NETWORK 1367void init_bpf(void); 1368void send_via_bpf(struct dhcp_packet *mess, size_t len, 1369 struct in_addr iface_addr, struct ifreq *ifr); 1370void route_init(void); 1371void route_sock(void); 1372#endif 1373 1374/* bpf.c or netlink.c */ 1375int iface_enumerate(int family, void *parm, int (callback)()); 1376 1377/* dbus.c */ 1378#ifdef HAVE_DBUS 1379char *dbus_init(void); 1380void check_dbus_listeners(void); 1381void set_dbus_listeners(void); 1382# ifdef HAVE_DHCP 1383void emit_dbus_signal(int action, struct dhcp_lease *lease, char *hostname); 1384# endif 1385#endif 1386 1387/* ipset.c */ 1388#ifdef HAVE_IPSET 1389void ipset_init(void); 1390int add_to_ipset(const char *setname, const struct all_addr *ipaddr, int flags, int remove); 1391#endif 1392 1393/* helper.c */ 1394#if defined(HAVE_SCRIPT) 1395int create_helper(int event_fd, int err_fd, uid_t uid, gid_t gid, long max_fd); 1396void helper_write(void); 1397void queue_script(int action, struct dhcp_lease *lease, 1398 char *hostname, time_t now); 1399#ifdef HAVE_TFTP 1400void queue_tftp(off_t file_len, char *filename, union mysockaddr *peer); 1401#endif 1402int helper_buf_empty(void); 1403#endif 1404 1405/* tftp.c */ 1406#ifdef HAVE_TFTP 1407void tftp_request(struct listener *listen, time_t now); 1408void check_tftp_listeners(time_t now); 1409int do_tftp_script_run(void); 1410#endif 1411 1412/* conntrack.c */ 1413#ifdef HAVE_CONNTRACK 1414int get_incoming_mark(union mysockaddr *peer_addr, struct all_addr *local_addr, 1415 int istcp, unsigned int *markp); 1416#endif 1417 1418/* dhcp6.c */ 1419#ifdef HAVE_DHCP6 1420void dhcp6_init(void); 1421void dhcp6_packet(time_t now); 1422struct dhcp_context *address6_allocate(struct dhcp_context *context, unsigned char *clid, int clid_len, int temp_addr, 1423 int iaid, int serial, struct dhcp_netid *netids, int plain_range, struct in6_addr *ans); 1424int config_valid(struct dhcp_config *config, struct dhcp_context *context, struct in6_addr *addr); 1425struct dhcp_context *address6_available(struct dhcp_context *context, 1426 struct in6_addr *taddr, 1427 struct dhcp_netid *netids, 1428 int plain_range); 1429struct dhcp_context *address6_valid(struct dhcp_context *context, 1430 struct in6_addr *taddr, 1431 struct dhcp_netid *netids, 1432 int plain_range); 1433struct dhcp_config *config_find_by_address6(struct dhcp_config *configs, struct in6_addr *net, 1434 int prefix, u64 addr); 1435void make_duid(time_t now); 1436void dhcp_construct_contexts(time_t now); 1437void get_client_mac(struct in6_addr *client, int iface, unsigned char *mac, 1438 unsigned int *maclenp, unsigned int *mactypep); 1439#endif 1440 1441/* rfc3315.c */ 1442#ifdef HAVE_DHCP6 1443unsigned short dhcp6_reply(struct dhcp_context *context, int interface, char *iface_name, 1444 struct in6_addr *fallback, struct in6_addr *ll_addr, struct in6_addr *ula_addr, 1445 size_t sz, struct in6_addr *client_addr, time_t now); 1446void relay_upstream6(struct dhcp_relay *relay, ssize_t sz, struct in6_addr *peer_address, u32 scope_id); 1447 1448unsigned short relay_reply6( struct sockaddr_in6 *peer, ssize_t sz, char *arrival_interface); 1449#endif 1450 1451/* dhcp-common.c */ 1452#ifdef HAVE_DHCP 1453void dhcp_common_init(void); 1454ssize_t recv_dhcp_packet(int fd, struct msghdr *msg); 1455struct dhcp_netid *run_tag_if(struct dhcp_netid *input); 1456struct dhcp_netid *option_filter(struct dhcp_netid *tags, struct dhcp_netid *context_tags, 1457 struct dhcp_opt *opts); 1458int match_netid(struct dhcp_netid *check, struct dhcp_netid *pool, int negonly); 1459char *strip_hostname(char *hostname); 1460void log_tags(struct dhcp_netid *netid, u32 xid); 1461int match_bytes(struct dhcp_opt *o, unsigned char *p, int len); 1462void dhcp_update_configs(struct dhcp_config *configs); 1463void display_opts(void); 1464int lookup_dhcp_opt(int prot, char *name); 1465int lookup_dhcp_len(int prot, int val); 1466char *option_string(int prot, unsigned int opt, unsigned char *val, 1467 int opt_len, char *buf, int buf_len); 1468struct dhcp_config *find_config(struct dhcp_config *configs, 1469 struct dhcp_context *context, 1470 unsigned char *clid, int clid_len, 1471 unsigned char *hwaddr, int hw_len, 1472 int hw_type, char *hostname); 1473int config_has_mac(struct dhcp_config *config, unsigned char *hwaddr, int len, int type); 1474#ifdef HAVE_LINUX_NETWORK 1475char *whichdevice(void); 1476void bindtodevice(char *device, int fd); 1477#endif 1478# ifdef HAVE_DHCP6 1479void display_opts6(void); 1480# endif 1481void log_context(int family, struct dhcp_context *context); 1482void log_relay(int family, struct dhcp_relay *relay); 1483#endif 1484 1485/* outpacket.c */ 1486#ifdef HAVE_DHCP6 1487void end_opt6(int container); 1488int save_counter(int newval); 1489void *expand(size_t headroom); 1490int new_opt6(int opt); 1491void *put_opt6(void *data, size_t len); 1492void put_opt6_long(unsigned int val); 1493void put_opt6_short(unsigned int val); 1494void put_opt6_char(unsigned int val); 1495void put_opt6_string(char *s); 1496#endif 1497 1498/* radv.c */ 1499#ifdef HAVE_DHCP6 1500void ra_init(time_t now); 1501void icmp6_packet(time_t now); 1502time_t periodic_ra(time_t now); 1503void ra_start_unsolicted(time_t now, struct dhcp_context *context); 1504#endif 1505 1506/* slaac.c */ 1507#ifdef HAVE_DHCP6 1508void slaac_add_addrs(struct dhcp_lease *lease, time_t now, int force); 1509time_t periodic_slaac(time_t now, struct dhcp_lease *leases); 1510void slaac_ping_reply(struct in6_addr *sender, unsigned char *packet, char *interface, struct dhcp_lease *leases); 1511#endif 1512 1513/* loop.c */ 1514#ifdef HAVE_LOOP 1515void loop_send_probes(); 1516int detect_loop(char *query, int type); 1517#endif 1518 1519/* inotify.c */ 1520#ifdef HAVE_INOTIFY 1521void inotify_dnsmasq_init(); 1522int inotify_check(time_t now); 1523void set_dynamic_inotify(int flag, int total_size, struct crec **rhash, int revhashsz); 1524#endif 1525 1526/* poll.c */ 1527void poll_reset(void); 1528int poll_check(int fd, short event); 1529void poll_listen(int fd, short event); 1530int do_poll(int timeout); 1531 1532