| /* dnsmasq is Copyright (c) 2000-2021 Simon Kelley |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; version 2 dated June, 1991, or |
| (at your option) version 3 dated 29 June, 2007. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #define COPYRIGHT "Copyright (c) 2000-2021 Simon Kelley" |
| |
| /* We do defines that influence behavior of stdio.h, so complain |
| if included too early. */ |
| #ifdef _STDIO_H |
| # error "Header file stdio.h included too early!" |
| #endif |
| |
| #ifndef NO_LARGEFILE |
| /* Ensure we can use files >2GB (log files may grow this big) */ |
| # define _LARGEFILE_SOURCE 1 |
| # define _FILE_OFFSET_BITS 64 |
| #endif |
| |
| /* Get linux C library versions and define _GNU_SOURCE for kFreeBSD. */ |
| #if defined(__linux__) || defined(__GLIBC__) |
| # ifndef __ANDROID__ |
| # define _GNU_SOURCE |
| # endif |
| # include <features.h> |
| #endif |
| |
| /* Need these defined early */ |
| #if defined(__sun) || defined(__sun__) |
| # define _XPG4_2 |
| # define __EXTENSIONS__ |
| #endif |
| |
| #if (defined(__GNUC__) && __GNUC__ >= 3) || defined(__clang__) |
| #define ATTRIBUTE_NORETURN __attribute__ ((noreturn)) |
| #else |
| #define ATTRIBUTE_NORETURN |
| #endif |
| |
| /* get these before config.h for IPv6 stuff... */ |
| #include <sys/types.h> |
| #include <sys/socket.h> |
| |
| #ifdef __APPLE__ |
| /* Define before netinet/in.h to select API. OSX Lion onwards. */ |
| # define __APPLE_USE_RFC_3542 |
| #endif |
| #include <netinet/in.h> |
| |
| /* Also needed before config.h. */ |
| #include <getopt.h> |
| |
| #include "config.h" |
| #include "ip6addr.h" |
| #include "metrics.h" |
| |
| typedef unsigned char u8; |
| typedef unsigned short u16; |
| typedef unsigned int u32; |
| typedef unsigned long long u64; |
| |
| #define countof(x) (long)(sizeof(x) / sizeof(x[0])) |
| #define MIN(a,b) ((a) < (b) ? (a) : (b)) |
| |
| #include "dns-protocol.h" |
| #include "dhcp-protocol.h" |
| #ifdef HAVE_DHCP6 |
| #include "dhcp6-protocol.h" |
| #include "radv-protocol.h" |
| #endif |
| |
| #define gettext_noop(S) (S) |
| #ifndef LOCALEDIR |
| # define _(S) (S) |
| #else |
| # include <libintl.h> |
| # include <locale.h> |
| # define _(S) gettext(S) |
| #endif |
| |
| #include <arpa/inet.h> |
| #include <sys/stat.h> |
| #include <sys/ioctl.h> |
| #if defined(HAVE_SOLARIS_NETWORK) |
| # include <sys/sockio.h> |
| #endif |
| #if defined(HAVE_POLL_H) |
| # include <poll.h> |
| #else |
| # include <sys/poll.h> |
| #endif |
| #include <sys/wait.h> |
| #include <sys/time.h> |
| #include <sys/un.h> |
| #include <limits.h> |
| #include <net/if.h> |
| #if defined(HAVE_SOLARIS_NETWORK) && !defined(ifr_mtu) |
| /* Some solaris net/if./h omit this. */ |
| # define ifr_mtu ifr_ifru.ifru_metric |
| #endif |
| #include <unistd.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <stdlib.h> |
| #include <fcntl.h> |
| #include <ctype.h> |
| #include <signal.h> |
| #include <stddef.h> |
| #include <time.h> |
| #include <errno.h> |
| #include <pwd.h> |
| #include <grp.h> |
| #include <stdarg.h> |
| #if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__sun__) || defined (__sun) || defined (__ANDROID__) |
| # include <netinet/if_ether.h> |
| #else |
| # include <net/ethernet.h> |
| #endif |
| #include <net/if_arp.h> |
| #include <netinet/in_systm.h> |
| #include <netinet/ip.h> |
| #include <netinet/ip6.h> |
| #include <netinet/ip_icmp.h> |
| #include <netinet/tcp.h> |
| #include <sys/uio.h> |
| #include <syslog.h> |
| #include <dirent.h> |
| #ifndef HAVE_LINUX_NETWORK |
| # include <net/if_dl.h> |
| #endif |
| |
| #if defined(HAVE_LINUX_NETWORK) |
| #include <linux/version.h> |
| #include <linux/sockios.h> |
| #include <linux/capability.h> |
| /* There doesn't seem to be a universally-available |
| userspace header for these. */ |
| extern int capset(cap_user_header_t header, cap_user_data_t data); |
| extern int capget(cap_user_header_t header, cap_user_data_t data); |
| #define LINUX_CAPABILITY_VERSION_1 0x19980330 |
| #define LINUX_CAPABILITY_VERSION_2 0x20071026 |
| #define LINUX_CAPABILITY_VERSION_3 0x20080522 |
| |
| #include <sys/prctl.h> |
| #elif defined(HAVE_SOLARIS_NETWORK) |
| #include <priv.h> |
| #endif |
| |
| /* Backwards compat with 2.83 */ |
| #if defined(HAVE_NETTLEHASH) |
| # define HAVE_CRYPTOHASH |
| #endif |
| #if defined(HAVE_DNSSEC) || defined(HAVE_CRYPTOHASH) |
| # include <nettle/nettle-meta.h> |
| #endif |
| |
| /* daemon is function in the C library.... */ |
| #define daemon dnsmasq_daemon |
| |
| #define ADDRSTRLEN INET6_ADDRSTRLEN |
| |
| /* Async event queue */ |
| struct event_desc { |
| int event, data, msg_sz; |
| }; |
| |
| #define EVENT_RELOAD 1 |
| #define EVENT_DUMP 2 |
| #define EVENT_ALARM 3 |
| #define EVENT_TERM 4 |
| #define EVENT_CHILD 5 |
| #define EVENT_REOPEN 6 |
| #define EVENT_EXITED 7 |
| #define EVENT_KILLED 8 |
| #define EVENT_EXEC_ERR 9 |
| #define EVENT_PIPE_ERR 10 |
| #define EVENT_USER_ERR 11 |
| #define EVENT_CAP_ERR 12 |
| #define EVENT_PIDFILE 13 |
| #define EVENT_HUSER_ERR 14 |
| #define EVENT_GROUP_ERR 15 |
| #define EVENT_DIE 16 |
| #define EVENT_LOG_ERR 17 |
| #define EVENT_FORK_ERR 18 |
| #define EVENT_LUA_ERR 19 |
| #define EVENT_TFTP_ERR 20 |
| #define EVENT_INIT 21 |
| #define EVENT_NEWADDR 22 |
| #define EVENT_NEWROUTE 23 |
| #define EVENT_TIME_ERR 24 |
| #define EVENT_SCRIPT_LOG 25 |
| #define EVENT_TIME 26 |
| |
| /* Exit codes. */ |
| #define EC_GOOD 0 |
| #define EC_BADCONF 1 |
| #define EC_BADNET 2 |
| #define EC_FILE 3 |
| #define EC_NOMEM 4 |
| #define EC_MISC 5 |
| #define EC_INIT_OFFSET 10 |
| |
| #define OPT_BOGUSPRIV 0 |
| #define OPT_FILTER 1 |
| #define OPT_LOG 2 |
| #define OPT_SELFMX 3 |
| #define OPT_NO_HOSTS 4 |
| #define OPT_NO_POLL 5 |
| #define OPT_DEBUG 6 |
| #define OPT_ORDER 7 |
| #define OPT_NO_RESOLV 8 |
| #define OPT_EXPAND 9 |
| #define OPT_LOCALMX 10 |
| #define OPT_NO_NEG 11 |
| #define OPT_NODOTS_LOCAL 12 |
| #define OPT_NOWILD 13 |
| #define OPT_ETHERS 14 |
| #define OPT_RESOLV_DOMAIN 15 |
| #define OPT_NO_FORK 16 |
| #define OPT_AUTHORITATIVE 17 |
| #define OPT_LOCALISE 18 |
| #define OPT_DBUS 19 |
| #define OPT_DHCP_FQDN 20 |
| #define OPT_NO_PING 21 |
| #define OPT_LEASE_RO 22 |
| #define OPT_ALL_SERVERS 23 |
| #define OPT_RELOAD 24 |
| #define OPT_LOCAL_REBIND 25 |
| #define OPT_TFTP_SECURE 26 |
| #define OPT_TFTP_NOBLOCK 27 |
| #define OPT_LOG_OPTS 28 |
| #define OPT_TFTP_APREF_IP 29 |
| #define OPT_NO_OVERRIDE 30 |
| #define OPT_NO_REBIND 31 |
| #define OPT_ADD_MAC 32 |
| #define OPT_DNSSEC_PROXY 33 |
| #define OPT_CONSEC_ADDR 34 |
| #define OPT_CONNTRACK 35 |
| #define OPT_FQDN_UPDATE 36 |
| #define OPT_RA 37 |
| #define OPT_TFTP_LC 38 |
| #define OPT_CLEVERBIND 39 |
| #define OPT_TFTP 40 |
| #define OPT_CLIENT_SUBNET 41 |
| #define OPT_QUIET_DHCP 42 |
| #define OPT_QUIET_DHCP6 43 |
| #define OPT_QUIET_RA 44 |
| #define OPT_DNSSEC_VALID 45 |
| #define OPT_DNSSEC_TIME 46 |
| #define OPT_DNSSEC_DEBUG 47 |
| #define OPT_DNSSEC_IGN_NS 48 |
| #define OPT_LOCAL_SERVICE 49 |
| #define OPT_LOOP_DETECT 50 |
| #define OPT_EXTRALOG 51 |
| #define OPT_TFTP_NO_FAIL 52 |
| #define OPT_SCRIPT_ARP 53 |
| #define OPT_MAC_B64 54 |
| #define OPT_MAC_HEX 55 |
| #define OPT_TFTP_APREF_MAC 56 |
| #define OPT_RAPID_COMMIT 57 |
| #define OPT_UBUS 58 |
| #define OPT_IGNORE_CLID 59 |
| #define OPT_SINGLE_PORT 60 |
| #define OPT_LEASE_RENEW 61 |
| #define OPT_LAST 62 |
| |
| #define OPTION_BITS (sizeof(unsigned int)*8) |
| #define OPTION_SIZE ( (OPT_LAST/OPTION_BITS)+((OPT_LAST%OPTION_BITS)!=0) ) |
| #define option_var(x) (daemon->options[(x) / OPTION_BITS]) |
| #define option_val(x) ((1u) << ((x) % OPTION_BITS)) |
| #define option_bool(x) (option_var(x) & option_val(x)) |
| |
| /* extra flags for my_syslog, we use a couple of facilities since they are known |
| not to occupy the same bits as priorities, no matter how syslog.h is set up. */ |
| #define MS_TFTP LOG_USER |
| #define MS_DHCP LOG_DAEMON |
| #define MS_SCRIPT LOG_MAIL |
| |
| /* Note that this is used widely as a container for IPv4/IPv6 addresses, |
| so for that reason, was well as to avoid wasting memory in almost every |
| cache entry, the other variants should not be larger than |
| sizeof(struct in6_addr) - 16 bytes. |
| */ |
| union all_addr { |
| struct in_addr addr4; |
| struct in6_addr addr6; |
| struct { |
| union { |
| struct crec *cache; |
| char *name; |
| } target; |
| unsigned int uid; |
| int is_name_ptr; /* disciminates target union */ |
| } cname; |
| struct { |
| struct blockdata *keydata; |
| unsigned short keylen, flags, keytag; |
| unsigned char algo; |
| } key; |
| struct { |
| struct blockdata *keydata; |
| unsigned short keylen, keytag; |
| unsigned char algo; |
| unsigned char digest; |
| } ds; |
| struct { |
| struct blockdata *target; |
| unsigned short targetlen, srvport, priority, weight; |
| } srv; |
| /* for log_query */ |
| struct { |
| unsigned short keytag, algo, digest, rcode; |
| } log; |
| }; |
| |
| |
| struct bogus_addr { |
| struct in_addr addr; |
| struct bogus_addr *next; |
| }; |
| |
| /* dns doctor param */ |
| struct doctor { |
| struct in_addr in, end, out, mask; |
| struct doctor *next; |
| }; |
| |
| struct mx_srv_record { |
| char *name, *target; |
| int issrv, srvport, priority, weight; |
| unsigned int offset; |
| struct mx_srv_record *next; |
| }; |
| |
| struct naptr { |
| char *name, *replace, *regexp, *services, *flags; |
| unsigned int order, pref; |
| struct naptr *next; |
| }; |
| |
| #ifndef NO_ID |
| #define TXT_STAT_CACHESIZE 1 |
| #define TXT_STAT_INSERTS 2 |
| #define TXT_STAT_EVICTIONS 3 |
| #define TXT_STAT_MISSES 4 |
| #define TXT_STAT_HITS 5 |
| #define TXT_STAT_AUTH 6 |
| #define TXT_STAT_SERVERS 7 |
| #endif |
| |
| struct txt_record { |
| char *name; |
| unsigned char *txt; |
| unsigned short class, len; |
| int stat; |
| struct txt_record *next; |
| }; |
| |
| struct ptr_record { |
| char *name, *ptr; |
| struct ptr_record *next; |
| }; |
| |
| struct cname { |
| int ttl, flag; |
| char *alias, *target; |
| struct cname *next, *targetp; |
| }; |
| |
| struct ds_config { |
| char *name, *digest; |
| int digestlen, class, algo, keytag, digest_type; |
| struct ds_config *next; |
| }; |
| |
| #define ADDRLIST_LITERAL 1 |
| #define ADDRLIST_IPV6 2 |
| #define ADDRLIST_REVONLY 4 |
| #define ADDRLIST_PREFIX 8 |
| #define ADDRLIST_WILDCARD 16 |
| #define ADDRLIST_DECLINED 32 |
| |
| struct addrlist { |
| union all_addr addr; |
| int flags, prefixlen; |
| time_t decline_time; |
| struct addrlist *next; |
| }; |
| |
| #define AUTH6 1 |
| #define AUTH4 2 |
| |
| struct auth_zone { |
| char *domain; |
| struct auth_name_list { |
| char *name; |
| int flags; |
| struct auth_name_list *next; |
| } *interface_names; |
| struct addrlist *subnet; |
| struct addrlist *exclude; |
| struct auth_zone *next; |
| }; |
| |
| #define HR_6 1 |
| #define HR_4 2 |
| |
| struct host_record { |
| int ttl, flags; |
| struct name_list { |
| char *name; |
| struct name_list *next; |
| } *names; |
| struct in_addr addr; |
| struct in6_addr addr6; |
| struct host_record *next; |
| }; |
| |
| struct interface_name { |
| char *name; /* domain name */ |
| char *intr; /* interface name */ |
| int family; /* AF_INET, AF_INET6 or zero for both */ |
| struct addrlist *addr; |
| struct interface_name *next; |
| }; |
| |
| union bigname { |
| char name[MAXDNAME]; |
| union bigname *next; /* freelist */ |
| }; |
| |
| struct blockdata { |
| struct blockdata *next; |
| unsigned char key[KEYBLOCK_LEN]; |
| }; |
| |
| struct crec { |
| struct crec *next, *prev, *hash_next; |
| union all_addr addr; |
| time_t ttd; /* time to die */ |
| /* used as class if DNSKEY/DS, index to source for F_HOSTS */ |
| unsigned int uid; |
| unsigned int flags; |
| union { |
| char sname[SMALLDNAME]; |
| union bigname *bname; |
| char *namep; |
| } name; |
| }; |
| |
| #define SIZEOF_BARE_CREC (sizeof(struct crec) - SMALLDNAME) |
| #define SIZEOF_POINTER_CREC (sizeof(struct crec) + sizeof(char *) - SMALLDNAME) |
| |
| #define F_IMMORTAL (1u<<0) |
| #define F_NAMEP (1u<<1) |
| #define F_REVERSE (1u<<2) |
| #define F_FORWARD (1u<<3) |
| #define F_DHCP (1u<<4) |
| #define F_NEG (1u<<5) |
| #define F_HOSTS (1u<<6) |
| #define F_IPV4 (1u<<7) |
| #define F_IPV6 (1u<<8) |
| #define F_BIGNAME (1u<<9) |
| #define F_NXDOMAIN (1u<<10) |
| #define F_CNAME (1u<<11) |
| #define F_DNSKEY (1u<<12) |
| #define F_CONFIG (1u<<13) |
| #define F_DS (1u<<14) |
| #define F_DNSSECOK (1u<<15) |
| #define F_UPSTREAM (1u<<16) |
| #define F_RRNAME (1u<<17) |
| #define F_SERVER (1u<<18) |
| #define F_QUERY (1u<<19) |
| #define F_NOERR (1u<<20) |
| #define F_AUTH (1u<<21) |
| #define F_DNSSEC (1u<<22) |
| #define F_KEYTAG (1u<<23) |
| #define F_SECSTAT (1u<<24) |
| #define F_NO_RR (1u<<25) |
| #define F_IPSET (1u<<26) |
| #define F_NOEXTRA (1u<<27) |
| #define F_SERVFAIL (1u<<28) /* currently unused. */ |
| #define F_RCODE (1u<<29) |
| #define F_SRV (1u<<30) |
| |
| #define UID_NONE 0 |
| /* Values of uid in crecs with F_CONFIG bit set. */ |
| #define SRC_CONFIG 1 |
| #define SRC_HOSTS 2 |
| #define SRC_AH 3 |
| |
| |
| /* struct sockaddr is not large enough to hold any address, |
| and specifically not big enough to hold an IPv6 address. |
| Blech. Roll our own. */ |
| union mysockaddr { |
| struct sockaddr sa; |
| struct sockaddr_in in; |
| struct sockaddr_in6 in6; |
| }; |
| |
| /* bits in flag param to IPv6 callbacks from iface_enumerate() */ |
| #define IFACE_TENTATIVE 1 |
| #define IFACE_DEPRECATED 2 |
| #define IFACE_PERMANENT 4 |
| |
| |
| #define SERV_FROM_RESOLV 1 /* 1 for servers from resolv, 0 for command line. */ |
| #define SERV_NO_ADDR 2 /* no server, this domain is local only */ |
| #define SERV_LITERAL_ADDRESS 4 /* addr is the answer, not the server */ |
| #define SERV_HAS_DOMAIN 8 /* server for one domain only */ |
| #define SERV_HAS_SOURCE 16 /* source address defined */ |
| #define SERV_FOR_NODOTS 32 /* server for names with no domain part only */ |
| #define SERV_WARNED_RECURSIVE 64 /* avoid warning spam */ |
| #define SERV_FROM_DBUS 128 /* 1 if source is DBus */ |
| #define SERV_MARK 256 /* for mark-and-delete */ |
| #define SERV_TYPE (SERV_HAS_DOMAIN | SERV_FOR_NODOTS) |
| #define SERV_COUNTED 512 /* workspace for log code */ |
| #define SERV_USE_RESOLV 1024 /* forward this domain in the normal way */ |
| #define SERV_NO_REBIND 2048 /* inhibit dns-rebind protection */ |
| #define SERV_FROM_FILE 4096 /* read from --servers-file */ |
| #define SERV_LOOP 8192 /* server causes forwarding loop */ |
| #define SERV_DO_DNSSEC 16384 /* Validate DNSSEC when using this server */ |
| #define SERV_GOT_TCP 32768 /* Got some data from the TCP connection */ |
| |
| struct serverfd { |
| int fd; |
| union mysockaddr source_addr; |
| char interface[IF_NAMESIZE+1]; |
| unsigned int ifindex, used, preallocated; |
| struct serverfd *next; |
| }; |
| |
| struct randfd { |
| int fd; |
| unsigned short refcount, family; |
| }; |
| |
| struct server { |
| union mysockaddr addr, source_addr; |
| char interface[IF_NAMESIZE+1]; |
| struct serverfd *sfd; |
| char *domain; /* set if this server only handles a domain. */ |
| int flags, tcpfd, edns_pktsz; |
| time_t pktsz_reduced; |
| unsigned int queries, failed_queries; |
| #ifdef HAVE_LOOP |
| u32 uid; |
| #endif |
| struct server *next; |
| }; |
| |
| struct ipsets { |
| char **sets; |
| char *domain; |
| struct ipsets *next; |
| }; |
| |
| struct irec { |
| union mysockaddr addr; |
| struct in_addr netmask; /* only valid for IPv4 */ |
| int tftp_ok, dhcp_ok, mtu, done, warned, dad, dns_auth, index, multicast_done, found, label; |
| char *name; |
| struct irec *next; |
| }; |
| |
| struct listener { |
| int fd, tcpfd, tftpfd, used; |
| union mysockaddr addr; |
| struct irec *iface; /* only sometimes valid for non-wildcard */ |
| struct listener *next; |
| }; |
| |
| /* interface and address parms from command line. */ |
| struct iname { |
| char *name; |
| union mysockaddr addr; |
| int used; |
| struct iname *next; |
| }; |
| |
| /* subnet parameters from command line */ |
| struct mysubnet { |
| union mysockaddr addr; |
| int addr_used; |
| int mask; |
| }; |
| |
| /* resolv-file parms from command-line */ |
| struct resolvc { |
| struct resolvc *next; |
| int is_default, logged; |
| time_t mtime; |
| char *name; |
| #ifdef HAVE_INOTIFY |
| int wd; /* inotify watch descriptor */ |
| char *file; /* pointer to file part if path */ |
| #endif |
| }; |
| |
| /* adn-hosts parms from command-line (also dhcp-hostsfile and dhcp-optsfile and dhcp-hostsdir*/ |
| #define AH_DIR 1 |
| #define AH_INACTIVE 2 |
| #define AH_WD_DONE 4 |
| #define AH_HOSTS 8 |
| #define AH_DHCP_HST 16 |
| #define AH_DHCP_OPT 32 |
| struct hostsfile { |
| struct hostsfile *next; |
| int flags; |
| char *fname; |
| #ifdef HAVE_INOTIFY |
| int wd; /* inotify watch descriptor */ |
| #endif |
| unsigned int index; /* matches to cache entries for logging */ |
| }; |
| |
| /* packet-dump flags */ |
| #define DUMP_QUERY 0x0001 |
| #define DUMP_REPLY 0x0002 |
| #define DUMP_UP_QUERY 0x0004 |
| #define DUMP_UP_REPLY 0x0008 |
| #define DUMP_SEC_QUERY 0x0010 |
| #define DUMP_SEC_REPLY 0x0020 |
| #define DUMP_BOGUS 0x0040 |
| #define DUMP_SEC_BOGUS 0x0080 |
| |
| |
| /* DNSSEC status values. */ |
| #define STAT_SECURE 1 |
| #define STAT_INSECURE 2 |
| #define STAT_BOGUS 3 |
| #define STAT_NEED_DS 4 |
| #define STAT_NEED_KEY 5 |
| #define STAT_TRUNCATED 6 |
| #define STAT_SECURE_WILDCARD 7 |
| #define STAT_OK 8 |
| #define STAT_ABANDONED 9 |
| |
| #define FREC_NOREBIND 1 |
| #define FREC_CHECKING_DISABLED 2 |
| #define FREC_HAS_SUBNET 4 |
| #define FREC_DNSKEY_QUERY 8 |
| #define FREC_DS_QUERY 16 |
| #define FREC_AD_QUESTION 32 |
| #define FREC_DO_QUESTION 64 |
| #define FREC_ADDED_PHEADER 128 |
| #define FREC_TEST_PKTSZ 256 |
| #define FREC_HAS_EXTRADATA 512 |
| #define FREC_HAS_PHEADER 1024 |
| #define FREC_NO_CACHE 2048 |
| |
| #define HASH_SIZE 32 /* SHA-256 digest size */ |
| |
| struct frec { |
| struct frec_src { |
| union mysockaddr source; |
| union all_addr dest; |
| unsigned int iface, log_id; |
| int fd; |
| unsigned short orig_id; |
| struct frec_src *next; |
| } frec_src; |
| struct server *sentto; /* NULL means free */ |
| struct randfd *rfd4; |
| struct randfd *rfd6; |
| unsigned short new_id; |
| int forwardall, flags; |
| time_t time; |
| unsigned char *hash[HASH_SIZE]; |
| #ifdef HAVE_DNSSEC |
| int class, work_counter; |
| struct blockdata *stash; /* Saved reply, whilst we validate */ |
| size_t stash_len; |
| struct frec *dependent; /* Query awaiting internally-generated DNSKEY or DS query */ |
| struct frec *blocking_query; /* Query which is blocking us. */ |
| #endif |
| struct frec *next; |
| }; |
| |
| /* flags in top of length field for DHCP-option tables */ |
| #define OT_ADDR_LIST 0x8000 |
| #define OT_RFC1035_NAME 0x4000 |
| #define OT_INTERNAL 0x2000 |
| #define OT_NAME 0x1000 |
| #define OT_CSTRING 0x0800 |
| #define OT_DEC 0x0400 |
| #define OT_TIME 0x0200 |
| |
| /* actions in the daemon->helper RPC */ |
| #define ACTION_DEL 1 |
| #define ACTION_OLD_HOSTNAME 2 |
| #define ACTION_OLD 3 |
| #define ACTION_ADD 4 |
| #define ACTION_TFTP 5 |
| #define ACTION_ARP 6 |
| #define ACTION_ARP_DEL 7 |
| |
| #define LEASE_NEW 1 /* newly created */ |
| #define LEASE_CHANGED 2 /* modified */ |
| #define LEASE_AUX_CHANGED 4 /* CLID or expiry changed */ |
| #define LEASE_AUTH_NAME 8 /* hostname came from config, not from client */ |
| #define LEASE_USED 16 /* used this DHCPv6 transaction */ |
| #define LEASE_NA 32 /* IPv6 no-temporary lease */ |
| #define LEASE_TA 64 /* IPv6 temporary lease */ |
| #define LEASE_HAVE_HWADDR 128 /* Have set hwaddress */ |
| #define LEASE_EXP_CHANGED 256 /* Lease expiry time changed */ |
| |
| struct dhcp_lease { |
| int clid_len; /* length of client identifier */ |
| unsigned char *clid; /* clientid */ |
| char *hostname, *fqdn; /* name from client-hostname option or config */ |
| char *old_hostname; /* hostname before it moved to another lease */ |
| int flags; |
| time_t expires; /* lease expiry */ |
| #ifdef HAVE_BROKEN_RTC |
| unsigned int length; |
| #endif |
| int hwaddr_len, hwaddr_type; |
| unsigned char hwaddr[DHCP_CHADDR_MAX]; |
| struct in_addr addr, override, giaddr; |
| unsigned char *extradata; |
| unsigned int extradata_len, extradata_size; |
| int last_interface; |
| int new_interface; /* save possible originated interface */ |
| int new_prefixlen; /* and its prefix length */ |
| #ifdef HAVE_DHCP6 |
| struct in6_addr addr6; |
| unsigned int iaid; |
| struct slaac_address { |
| struct in6_addr addr; |
| time_t ping_time; |
| int backoff; /* zero -> confirmed */ |
| struct slaac_address *next; |
| } *slaac_address; |
| int vendorclass_count; |
| #endif |
| struct dhcp_lease *next; |
| }; |
| |
| struct dhcp_netid { |
| char *net; |
| struct dhcp_netid *next; |
| }; |
| |
| struct dhcp_netid_list { |
| struct dhcp_netid *list; |
| struct dhcp_netid_list *next; |
| }; |
| |
| struct tag_if { |
| struct dhcp_netid_list *set; |
| struct dhcp_netid *tag; |
| struct tag_if *next; |
| }; |
| |
| struct delay_config { |
| int delay; |
| struct dhcp_netid *netid; |
| struct delay_config *next; |
| }; |
| |
| struct hwaddr_config { |
| int hwaddr_len, hwaddr_type; |
| unsigned char hwaddr[DHCP_CHADDR_MAX]; |
| unsigned int wildcard_mask; |
| struct hwaddr_config *next; |
| }; |
| |
| struct dhcp_config { |
| unsigned int flags; |
| int clid_len; /* length of client identifier */ |
| unsigned char *clid; /* clientid */ |
| char *hostname, *domain; |
| struct dhcp_netid_list *netid; |
| struct dhcp_netid *filter; |
| #ifdef HAVE_DHCP6 |
| struct addrlist *addr6; |
| #endif |
| struct in_addr addr; |
| time_t decline_time; |
| unsigned int lease_time; |
| struct hwaddr_config *hwaddr; |
| struct dhcp_config *next; |
| }; |
| |
| #define have_config(config, mask) ((config) && ((config)->flags & (mask))) |
| |
| #define CONFIG_DISABLE 1 |
| #define CONFIG_CLID 2 |
| #define CONFIG_TIME 8 |
| #define CONFIG_NAME 16 |
| #define CONFIG_ADDR 32 |
| #define CONFIG_NOCLID 128 |
| #define CONFIG_FROM_ETHERS 256 /* entry created by /etc/ethers */ |
| #define CONFIG_ADDR_HOSTS 512 /* address added by from /etc/hosts */ |
| #define CONFIG_DECLINED 1024 /* address declined by client */ |
| #define CONFIG_BANK 2048 /* from dhcp hosts file */ |
| #define CONFIG_ADDR6 4096 |
| #define CONFIG_ADDR6_HOSTS 16384 /* address added by from /etc/hosts */ |
| |
| struct dhcp_opt { |
| int opt, len, flags; |
| union { |
| int encap; |
| unsigned int wildcard_mask; |
| unsigned char *vendor_class; |
| } u; |
| unsigned char *val; |
| struct dhcp_netid *netid; |
| struct dhcp_opt *next; |
| }; |
| |
| #define DHOPT_ADDR 1 |
| #define DHOPT_STRING 2 |
| #define DHOPT_ENCAPSULATE 4 |
| #define DHOPT_ENCAP_MATCH 8 |
| #define DHOPT_FORCE 16 |
| #define DHOPT_BANK 32 |
| #define DHOPT_ENCAP_DONE 64 |
| #define DHOPT_MATCH 128 |
| #define DHOPT_VENDOR 256 |
| #define DHOPT_HEX 512 |
| #define DHOPT_VENDOR_MATCH 1024 |
| #define DHOPT_RFC3925 2048 |
| #define DHOPT_TAGOK 4096 |
| #define DHOPT_ADDR6 8192 |
| #define DHOPT_VENDOR_PXE 16384 |
| |
| struct dhcp_boot { |
| char *file, *sname, *tftp_sname; |
| struct in_addr next_server; |
| struct dhcp_netid *netid; |
| struct dhcp_boot *next; |
| }; |
| |
| struct dhcp_match_name { |
| char *name; |
| int wildcard; |
| struct dhcp_netid *netid; |
| struct dhcp_match_name *next; |
| }; |
| |
| struct pxe_service { |
| unsigned short CSA, type; |
| char *menu, *basename, *sname; |
| struct in_addr server; |
| struct dhcp_netid *netid; |
| struct pxe_service *next; |
| }; |
| |
| #define DHCP_PXE_DEF_VENDOR "PXEClient" |
| |
| #define MATCH_VENDOR 1 |
| #define MATCH_USER 2 |
| #define MATCH_CIRCUIT 3 |
| #define MATCH_REMOTE 4 |
| #define MATCH_SUBSCRIBER 5 |
| |
| /* vendorclass, userclass, remote-id or circuit-id */ |
| struct dhcp_vendor { |
| int len, match_type; |
| unsigned int enterprise; |
| char *data; |
| struct dhcp_netid netid; |
| struct dhcp_vendor *next; |
| }; |
| |
| struct dhcp_pxe_vendor { |
| char *data; |
| struct dhcp_pxe_vendor *next; |
| }; |
| |
| struct dhcp_mac { |
| unsigned int mask; |
| int hwaddr_len, hwaddr_type; |
| unsigned char hwaddr[DHCP_CHADDR_MAX]; |
| struct dhcp_netid netid; |
| struct dhcp_mac *next; |
| }; |
| |
| struct dhcp_bridge { |
| char iface[IF_NAMESIZE]; |
| struct dhcp_bridge *alias, *next; |
| }; |
| |
| struct cond_domain { |
| char *domain, *prefix; |
| struct in_addr start, end; |
| struct in6_addr start6, end6; |
| int is6, indexed; |
| struct cond_domain *next; |
| }; |
| |
| struct ra_interface { |
| char *name; |
| char *mtu_name; |
| int interval, lifetime, prio, mtu; |
| struct ra_interface *next; |
| }; |
| |
| struct dhcp_context { |
| unsigned int lease_time, addr_epoch; |
| struct in_addr netmask, broadcast; |
| struct in_addr local, router; |
| struct in_addr start, end; /* range of available addresses */ |
| #ifdef HAVE_DHCP6 |
| struct in6_addr start6, end6; /* range of available addresses */ |
| struct in6_addr local6; |
| int prefix, if_index; |
| unsigned int valid, preferred, saved_valid; |
| time_t ra_time, ra_short_period_start, address_lost_time; |
| char *template_interface; |
| #endif |
| int flags; |
| struct dhcp_netid netid, *filter; |
| struct dhcp_context *next, *current; |
| }; |
| |
| struct shared_network { |
| int if_index; |
| struct in_addr match_addr, shared_addr; |
| #ifdef HAVE_DHCP6 |
| /* shared_addr == 0 for IP6 entries. */ |
| struct in6_addr match_addr6, shared_addr6; |
| #endif |
| struct shared_network *next; |
| }; |
| |
| #define CONTEXT_STATIC (1u<<0) |
| #define CONTEXT_NETMASK (1u<<1) |
| #define CONTEXT_BRDCAST (1u<<2) |
| #define CONTEXT_PROXY (1u<<3) |
| #define CONTEXT_RA_ROUTER (1u<<4) |
| #define CONTEXT_RA_DONE (1u<<5) |
| #define CONTEXT_RA_NAME (1u<<6) |
| #define CONTEXT_RA_STATELESS (1u<<7) |
| #define CONTEXT_DHCP (1u<<8) |
| #define CONTEXT_DEPRECATE (1u<<9) |
| #define CONTEXT_TEMPLATE (1u<<10) /* create contexts using addresses */ |
| #define CONTEXT_CONSTRUCTED (1u<<11) |
| #define CONTEXT_GC (1u<<12) |
| #define CONTEXT_RA (1u<<13) |
| #define CONTEXT_CONF_USED (1u<<14) |
| #define CONTEXT_USED (1u<<15) |
| #define CONTEXT_OLD (1u<<16) |
| #define CONTEXT_V6 (1u<<17) |
| #define CONTEXT_RA_OFF_LINK (1u<<18) |
| #define CONTEXT_SETLEASE (1u<<19) |
| |
| struct ping_result { |
| struct in_addr addr; |
| time_t time; |
| unsigned int hash; |
| struct ping_result *next; |
| }; |
| |
| struct tftp_file { |
| int refcount, fd; |
| off_t size; |
| dev_t dev; |
| ino_t inode; |
| char filename[]; |
| }; |
| |
| struct tftp_transfer { |
| int sockfd; |
| time_t timeout; |
| int backoff; |
| unsigned int block, blocksize, expansion; |
| off_t offset; |
| union mysockaddr peer; |
| union all_addr source; |
| int if_index; |
| char opt_blocksize, opt_transize, netascii, carrylf; |
| struct tftp_file *file; |
| struct tftp_transfer *next; |
| }; |
| |
| struct addr_list { |
| struct in_addr addr; |
| struct addr_list *next; |
| }; |
| |
| struct tftp_prefix { |
| char *interface; |
| char *prefix; |
| int missing; |
| struct tftp_prefix *next; |
| }; |
| |
| struct dhcp_relay { |
| union all_addr local, server; |
| char *interface; /* Allowable interface for replies from server, and dest for IPv6 multicast */ |
| int iface_index; /* working - interface in which requests arrived, for return */ |
| struct dhcp_relay *current, *next; |
| }; |
| |
| extern struct daemon { |
| /* datastuctures representing the command-line and |
| config file arguments. All set (including defaults) |
| in option.c */ |
| |
| unsigned int options[OPTION_SIZE]; |
| struct resolvc default_resolv, *resolv_files; |
| time_t last_resolv; |
| char *servers_file; |
| struct mx_srv_record *mxnames; |
| struct naptr *naptr; |
| struct txt_record *txt, *rr; |
| struct ptr_record *ptr; |
| struct host_record *host_records, *host_records_tail; |
| struct cname *cnames; |
| struct auth_zone *auth_zones; |
| struct interface_name *int_names; |
| char *mxtarget; |
| struct mysubnet *add_subnet4; |
| struct mysubnet *add_subnet6; |
| char *lease_file; |
| char *username, *groupname, *scriptuser; |
| char *luascript; |
| char *authserver, *hostmaster; |
| struct iname *authinterface; |
| struct name_list *secondary_forward_server; |
| int group_set, osport; |
| char *domain_suffix; |
| struct cond_domain *cond_domain, *synth_domains; |
| char *runfile; |
| char *lease_change_command; |
| struct iname *if_names, *if_addrs, *if_except, *dhcp_except, *auth_peers, *tftp_interfaces; |
| struct bogus_addr *bogus_addr, *ignore_addr; |
| struct server *servers; |
| struct ipsets *ipsets; |
| int log_fac; /* log facility */ |
| char *log_file; /* optional log file */ |
| int max_logs; /* queue limit */ |
| int cachesize, ftabsize; |
| int port, query_port, min_port, max_port; |
| unsigned long local_ttl, neg_ttl, max_ttl, min_cache_ttl, max_cache_ttl, auth_ttl, dhcp_ttl, use_dhcp_ttl; |
| char *dns_client_id; |
| struct hostsfile *addn_hosts; |
| struct dhcp_context *dhcp, *dhcp6; |
| struct ra_interface *ra_interfaces; |
| struct dhcp_config *dhcp_conf; |
| struct dhcp_opt *dhcp_opts, *dhcp_match, *dhcp_opts6, *dhcp_match6; |
| struct dhcp_match_name *dhcp_name_match; |
| struct dhcp_pxe_vendor *dhcp_pxe_vendors; |
| struct dhcp_vendor *dhcp_vendors; |
| struct dhcp_mac *dhcp_macs; |
| struct dhcp_boot *boot_config; |
| struct pxe_service *pxe_services; |
| struct tag_if *tag_if; |
| struct addr_list *override_relays; |
| struct dhcp_relay *relay4, *relay6; |
| struct delay_config *delay_conf; |
| int override; |
| int enable_pxe; |
| int doing_ra, doing_dhcp6; |
| struct dhcp_netid_list *dhcp_ignore, *dhcp_ignore_names, *dhcp_gen_names; |
| struct dhcp_netid_list *force_broadcast, *bootp_dynamic; |
| struct hostsfile *dhcp_hosts_file, *dhcp_opts_file, *dynamic_dirs; |
| int dhcp_max, tftp_max, tftp_mtu; |
| int dhcp_server_port, dhcp_client_port; |
| int start_tftp_port, end_tftp_port; |
| unsigned int min_leasetime; |
| struct doctor *doctors; |
| unsigned short edns_pktsz; |
| char *tftp_prefix; |
| struct tftp_prefix *if_prefix; /* per-interface TFTP prefixes */ |
| unsigned int duid_enterprise, duid_config_len; |
| unsigned char *duid_config; |
| char *dbus_name; |
| char *ubus_name; |
| char *dump_file; |
| int dump_mask; |
| unsigned long soa_sn, soa_refresh, soa_retry, soa_expiry; |
| u32 metrics[__METRIC_MAX]; |
| #ifdef HAVE_DNSSEC |
| struct ds_config *ds; |
| char *timestamp_file; |
| #endif |
| |
| /* globally used stuff for DNS */ |
| char *packet; /* packet buffer */ |
| int packet_buff_sz; /* size of above */ |
| char *namebuff; /* MAXDNAME size buffer */ |
| #ifdef HAVE_DNSSEC |
| char *keyname; /* MAXDNAME size buffer */ |
| char *workspacename; /* ditto */ |
| unsigned long *rr_status; /* ceiling in TTL from DNSSEC or zero for insecure */ |
| int rr_status_sz; |
| int dnssec_no_time_check; |
| int back_to_the_future; |
| #endif |
| struct frec *frec_list; |
| struct frec_src *free_frec_src; |
| int frec_src_count; |
| struct serverfd *sfds; |
| struct irec *interfaces; |
| struct listener *listeners; |
| struct server *last_server; |
| time_t forwardtime; |
| int forwardcount; |
| struct server *srv_save; /* Used for resend on DoD */ |
| size_t packet_len; /* " " */ |
| struct randfd *rfd_save; /* " " */ |
| pid_t tcp_pids[MAX_PROCS]; |
| int tcp_pipes[MAX_PROCS]; |
| int pipe_to_parent; |
| struct randfd randomsocks[RANDOM_SOCKS]; |
| int v6pktinfo; |
| struct addrlist *interface_addrs; /* list of all addresses/prefix lengths associated with all local interfaces */ |
| int log_id, log_display_id; /* ids of transactions for logging */ |
| union mysockaddr *log_source_addr; |
| |
| /* DHCP state */ |
| int dhcpfd, helperfd, pxefd; |
| #ifdef HAVE_INOTIFY |
| int inotifyfd; |
| #endif |
| #if defined(HAVE_LINUX_NETWORK) |
| int netlinkfd, kernel_version; |
| #elif defined(HAVE_BSD_NETWORK) |
| int dhcp_raw_fd, dhcp_icmp_fd, routefd; |
| #endif |
| struct iovec dhcp_packet; |
| char *dhcp_buff, *dhcp_buff2, *dhcp_buff3; |
| struct ping_result *ping_results; |
| FILE *lease_stream; |
| struct dhcp_bridge *bridges; |
| struct shared_network *shared_networks; |
| #ifdef HAVE_DHCP6 |
| int duid_len; |
| unsigned char *duid; |
| struct iovec outpacket; |
| int dhcp6fd, icmp6fd; |
| #endif |
| /* DBus stuff */ |
| /* void * here to avoid depending on dbus headers outside dbus.c */ |
| void *dbus; |
| #ifdef HAVE_DBUS |
| struct watch *watches; |
| #endif |
| /* UBus stuff */ |
| #ifdef HAVE_UBUS |
| /* void * here to avoid depending on ubus headers outside ubus.c */ |
| void *ubus; |
| #endif |
| |
| /* TFTP stuff */ |
| struct tftp_transfer *tftp_trans, *tftp_done_trans; |
| |
| /* utility string buffer, hold max sized IP address as string */ |
| char *addrbuff; |
| char *addrbuff2; /* only allocated when OPT_EXTRALOG */ |
| |
| #ifdef HAVE_DUMPFILE |
| /* file for packet dumps. */ |
| int dumpfd; |
| #endif |
| } *daemon; |
| |
| /* cache.c */ |
| void cache_init(void); |
| void next_uid(struct crec *crecp); |
| void log_query(unsigned int flags, char *name, union all_addr *addr, char *arg); |
| char *record_source(unsigned int index); |
| char *querystr(char *desc, unsigned short type); |
| int cache_find_non_terminal(char *name, time_t now); |
| struct crec *cache_find_by_addr(struct crec *crecp, |
| union all_addr *addr, time_t now, |
| unsigned int prot); |
| struct crec *cache_find_by_name(struct crec *crecp, |
| char *name, time_t now, unsigned int prot); |
| void cache_end_insert(void); |
| void cache_start_insert(void); |
| int cache_recv_insert(time_t now, int fd); |
| struct crec *cache_insert(char *name, union all_addr *addr, unsigned short class, |
| time_t now, unsigned long ttl, unsigned int flags); |
| void cache_reload(void); |
| void cache_add_dhcp_entry(char *host_name, int prot, union all_addr *host_address, time_t ttd); |
| struct in_addr a_record_from_hosts(char *name, time_t now); |
| void cache_unhash_dhcp(void); |
| void dump_cache(time_t now); |
| #ifndef NO_ID |
| int cache_make_stat(struct txt_record *t); |
| #endif |
| char *cache_get_name(struct crec *crecp); |
| char *cache_get_cname_target(struct crec *crecp); |
| struct crec *cache_enumerate(int init); |
| int read_hostsfile(char *filename, unsigned int index, int cache_size, |
| struct crec **rhash, int hashsz); |
| |
| /* blockdata.c */ |
| void blockdata_init(void); |
| void blockdata_report(void); |
| struct blockdata *blockdata_alloc(char *data, size_t len); |
| void *blockdata_retrieve(struct blockdata *block, size_t len, void *data); |
| struct blockdata *blockdata_read(int fd, size_t len); |
| void blockdata_write(struct blockdata *block, size_t len, int fd); |
| void blockdata_free(struct blockdata *blocks); |
| |
| /* domain.c */ |
| char *get_domain(struct in_addr addr); |
| char *get_domain6(struct in6_addr *addr); |
| int is_name_synthetic(int flags, char *name, union all_addr *addr); |
| int is_rev_synth(int flag, union all_addr *addr, char *name); |
| |
| /* rfc1035.c */ |
| int extract_name(struct dns_header *header, size_t plen, unsigned char **pp, |
| char *name, int isExtract, int extrabytes); |
| unsigned char *skip_name(unsigned char *ansp, struct dns_header *header, size_t plen, int extrabytes); |
| unsigned char *skip_questions(struct dns_header *header, size_t plen); |
| unsigned char *skip_section(unsigned char *ansp, int count, struct dns_header *header, size_t plen); |
| unsigned int extract_request(struct dns_header *header, size_t qlen, |
| char *name, unsigned short *typep); |
| size_t setup_reply(struct dns_header *header, size_t qlen, |
| union all_addr *addrp, unsigned int flags, |
| unsigned long ttl); |
| int extract_addresses(struct dns_header *header, size_t qlen, char *name, |
| time_t now, char **ipsets, int is_sign, int check_rebind, |
| int no_cache_dnssec, int secure, int *doctored); |
| size_t answer_request(struct dns_header *header, char *limit, size_t qlen, |
| struct in_addr local_addr, struct in_addr local_netmask, |
| time_t now, int ad_reqd, int do_bit, int have_pseudoheader); |
| int check_for_bogus_wildcard(struct dns_header *header, size_t qlen, char *name, |
| struct bogus_addr *baddr, time_t now); |
| int check_for_ignored_address(struct dns_header *header, size_t qlen, struct bogus_addr *baddr); |
| int check_for_local_domain(char *name, time_t now); |
| size_t resize_packet(struct dns_header *header, size_t plen, |
| unsigned char *pheader, size_t hlen); |
| int add_resource_record(struct dns_header *header, char *limit, int *truncp, |
| int nameoffset, unsigned char **pp, unsigned long ttl, |
| int *offset, unsigned short type, unsigned short class, char *format, ...); |
| int in_arpa_name_2_addr(char *namein, union all_addr *addrp); |
| int private_net(struct in_addr addr, int ban_localhost); |
| |
| /* auth.c */ |
| #ifdef HAVE_AUTH |
| size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, |
| time_t now, union mysockaddr *peer_addr, int local_query, |
| int do_bit, int have_pseudoheader); |
| int in_zone(struct auth_zone *zone, char *name, char **cut); |
| #endif |
| |
| /* dnssec.c */ |
| size_t dnssec_generate_query(struct dns_header *header, unsigned char *end, char *name, int class, int type, int edns_pktsz); |
| int dnssec_validate_by_ds(time_t now, struct dns_header *header, size_t plen, char *name, char *keyname, int class); |
| int dnssec_validate_ds(time_t now, struct dns_header *header, size_t plen, char *name, char *keyname, int class); |
| int dnssec_validate_reply(time_t now, struct dns_header *header, size_t plen, char *name, char *keyname, int *class, |
| int check_unsigned, int *neganswer, int *nons, int *nsec_ttl); |
| int dnskey_keytag(int alg, int flags, unsigned char *key, int keylen); |
| size_t filter_rrsigs(struct dns_header *header, size_t plen); |
| int setup_timestamp(void); |
| |
| /* hash_questions.c */ |
| void hash_questions_init(void); |
| unsigned char *hash_questions(struct dns_header *header, size_t plen, char *name); |
| |
| /* crypto.c */ |
| const struct nettle_hash *hash_find(char *name); |
| int hash_init(const struct nettle_hash *hash, void **ctxp, unsigned char **digestp); |
| int verify(struct blockdata *key_data, unsigned int key_len, unsigned char *sig, size_t sig_len, |
| unsigned char *digest, size_t digest_len, int algo); |
| char *ds_digest_name(int digest); |
| char *algo_digest_name(int algo); |
| char *nsec3_digest_name(int digest); |
| |
| /* util.c */ |
| void rand_init(void); |
| unsigned short rand16(void); |
| u32 rand32(void); |
| u64 rand64(void); |
| int legal_hostname(char *name); |
| char *canonicalise(char *in, int *nomem); |
| unsigned char *do_rfc1035_name(unsigned char *p, char *sval, char *limit); |
| void *safe_malloc(size_t size); |
| void safe_strncpy(char *dest, const char *src, size_t size); |
| void safe_pipe(int *fd, int read_noblock); |
| void *whine_malloc(size_t size); |
| int sa_len(union mysockaddr *addr); |
| int sockaddr_isequal(union mysockaddr *s1, union mysockaddr *s2); |
| int hostname_isequal(const char *a, const char *b); |
| int hostname_issubdomain(char *a, char *b); |
| time_t dnsmasq_time(void); |
| int netmask_length(struct in_addr mask); |
| int is_same_net(struct in_addr a, struct in_addr b, struct in_addr mask); |
| int is_same_net6(struct in6_addr *a, struct in6_addr *b, int prefixlen); |
| u64 addr6part(struct in6_addr *addr); |
| void setaddr6part(struct in6_addr *addr, u64 host); |
| int retry_send(ssize_t rc); |
| void prettyprint_time(char *buf, unsigned int t); |
| int prettyprint_addr(union mysockaddr *addr, char *buf); |
| int parse_hex(char *in, unsigned char *out, int maxlen, |
| unsigned int *wildcard_mask, int *mac_type); |
| int memcmp_masked(unsigned char *a, unsigned char *b, int len, |
| unsigned int mask); |
| int expand_buf(struct iovec *iov, size_t size); |
| char *print_mac(char *buff, unsigned char *mac, int len); |
| int read_write(int fd, unsigned char *packet, int size, int rw); |
| void close_fds(long max_fd, int spare1, int spare2, int spare3); |
| int wildcard_match(const char* wildcard, const char* match); |
| int wildcard_matchn(const char* wildcard, const char* match, int num); |
| #ifdef HAVE_LINUX_NETWORK |
| int kernel_version(void); |
| #endif |
| |
| /* log.c */ |
| void die(char *message, char *arg1, int exit_code) ATTRIBUTE_NORETURN; |
| int log_start(struct passwd *ent_pw, int errfd); |
| int log_reopen(char *log_file); |
| |
| void my_syslog(int priority, const char *format, ...); |
| |
| void set_log_writer(void); |
| void check_log_writer(int force); |
| void flush_log(void); |
| |
| /* option.c */ |
| void read_opts (int argc, char **argv, char *compile_opts); |
| char *option_string(int prot, unsigned int opt, unsigned char *val, |
| int opt_len, char *buf, int buf_len); |
| void reread_dhcp(void); |
| void read_servers_file(void); |
| void set_option_bool(unsigned int opt); |
| void reset_option_bool(unsigned int opt); |
| struct hostsfile *expand_filelist(struct hostsfile *list); |
| char *parse_server(char *arg, union mysockaddr *addr, |
| union mysockaddr *source_addr, char *interface, int *flags); |
| int option_read_dynfile(char *file, int flags); |
| |
| /* forward.c */ |
| void reply_query(int fd, int family, time_t now); |
| void receive_query(struct listener *listen, time_t now); |
| unsigned char *tcp_request(int confd, time_t now, |
| union mysockaddr *local_addr, struct in_addr netmask, int auth_dns); |
| void server_gone(struct server *server); |
| struct frec *get_new_frec(time_t now, int *wait, struct frec *force); |
| int send_from(int fd, int nowild, char *packet, size_t len, |
| union mysockaddr *to, union all_addr *source, |
| unsigned int iface); |
| void resend_query(void); |
| struct randfd *allocate_rfd(int family); |
| void free_rfd(struct randfd *rfd); |
| |
| /* network.c */ |
| int indextoname(int fd, int index, char *name); |
| int local_bind(int fd, union mysockaddr *addr, char *intname, unsigned int ifindex, int is_tcp); |
| int random_sock(int family); |
| void pre_allocate_sfds(void); |
| int reload_servers(char *fname); |
| void mark_servers(int flag); |
| void cleanup_servers(void); |
| void add_update_server(int flags, |
| union mysockaddr *addr, |
| union mysockaddr *source_addr, |
| const char *interface, |
| const char *domain); |
| void check_servers(void); |
| int enumerate_interfaces(int reset); |
| void create_wildcard_listeners(void); |
| void create_bound_listeners(int dienow); |
| void warn_bound_listeners(void); |
| void warn_wild_labels(void); |
| void warn_int_names(void); |
| int is_dad_listeners(void); |
| int iface_check(int family, union all_addr *addr, char *name, int *auth); |
| int loopback_exception(int fd, int family, union all_addr *addr, char *name); |
| int label_exception(int index, int family, union all_addr *addr); |
| int fix_fd(int fd); |
| int tcp_interface(int fd, int af); |
| int set_ipv6pktinfo(int fd); |
| #ifdef HAVE_DHCP6 |
| void join_multicast(int dienow); |
| #endif |
| #if defined(HAVE_LINUX_NETWORK) || defined(HAVE_BSD_NETWORK) |
| void newaddress(time_t now); |
| #endif |
| |
| |
| /* dhcp.c */ |
| #ifdef HAVE_DHCP |
| void dhcp_init(void); |
| void dhcp_packet(time_t now, int pxe_fd); |
| struct dhcp_context *address_available(struct dhcp_context *context, |
| struct in_addr taddr, |
| struct dhcp_netid *netids); |
| struct dhcp_context *narrow_context(struct dhcp_context *context, |
| struct in_addr taddr, |
| struct dhcp_netid *netids); |
| struct ping_result *do_icmp_ping(time_t now, struct in_addr addr, |
| unsigned int hash, int loopback); |
| int address_allocate(struct dhcp_context *context, |
| struct in_addr *addrp, unsigned char *hwaddr, int hw_len, |
| struct dhcp_netid *netids, time_t now, int loopback); |
| void dhcp_read_ethers(void); |
| struct dhcp_config *config_find_by_address(struct dhcp_config *configs, struct in_addr addr); |
| char *host_from_dns(struct in_addr addr); |
| #endif |
| |
| /* lease.c */ |
| #ifdef HAVE_DHCP |
| void lease_update_file(time_t now); |
| void lease_update_dns(int force); |
| void lease_init(time_t now); |
| struct dhcp_lease *lease4_allocate(struct in_addr addr); |
| #ifdef HAVE_DHCP6 |
| struct dhcp_lease *lease6_allocate(struct in6_addr *addrp, int lease_type); |
| struct dhcp_lease *lease6_find(unsigned char *clid, int clid_len, |
| int lease_type, unsigned int iaid, struct in6_addr *addr); |
| void lease6_reset(void); |
| struct dhcp_lease *lease6_find_by_client(struct dhcp_lease *first, int lease_type, |
| unsigned char *clid, int clid_len, unsigned int iaid); |
| struct dhcp_lease *lease6_find_by_addr(struct in6_addr *net, int prefix, u64 addr); |
| u64 lease_find_max_addr6(struct dhcp_context *context); |
| void lease_ping_reply(struct in6_addr *sender, unsigned char *packet, char *interface); |
| void lease_update_slaac(time_t now); |
| void lease_set_iaid(struct dhcp_lease *lease, unsigned int iaid); |
| void lease_make_duid(time_t now); |
| #endif |
| void lease_set_hwaddr(struct dhcp_lease *lease, const unsigned char *hwaddr, |
| const unsigned char *clid, int hw_len, int hw_type, |
| int clid_len, time_t now, int force); |
| void lease_set_hostname(struct dhcp_lease *lease, const char *name, int auth, char *domain, char *config_domain); |
| void lease_set_expires(struct dhcp_lease *lease, unsigned int len, time_t now); |
| void lease_set_interface(struct dhcp_lease *lease, int interface, time_t now); |
| struct dhcp_lease *lease_find_by_client(unsigned char *hwaddr, int hw_len, int hw_type, |
| unsigned char *clid, int clid_len); |
| struct dhcp_lease *lease_find_by_addr(struct in_addr addr); |
| struct in_addr lease_find_max_addr(struct dhcp_context *context); |
| void lease_prune(struct dhcp_lease *target, time_t now); |
| void lease_update_from_configs(void); |
| int do_script_run(time_t now); |
| void rerun_scripts(void); |
| void lease_find_interfaces(time_t now); |
| #ifdef HAVE_SCRIPT |
| void lease_add_extradata(struct dhcp_lease *lease, unsigned char *data, |
| unsigned int len, int delim); |
| #endif |
| #endif |
| |
| /* rfc2131.c */ |
| #ifdef HAVE_DHCP |
| size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index, |
| size_t sz, time_t now, int unicast_dest, int loopback, |
| int *is_inform, int pxe, struct in_addr fallback, time_t recvtime); |
| unsigned char *extended_hwaddr(int hwtype, int hwlen, unsigned char *hwaddr, |
| int clid_len, unsigned char *clid, int *len_out); |
| #endif |
| |
| /* dnsmasq.c */ |
| #ifdef HAVE_DHCP |
| int make_icmp_sock(void); |
| int icmp_ping(struct in_addr addr); |
| int delay_dhcp(time_t start, int sec, int fd, uint32_t addr, unsigned short id); |
| #endif |
| void queue_event(int event); |
| void send_alarm(time_t event, time_t now); |
| void send_event(int fd, int event, int data, char *msg); |
| void clear_cache_and_reload(time_t now); |
| |
| /* netlink.c */ |
| #ifdef HAVE_LINUX_NETWORK |
| char *netlink_init(void); |
| void netlink_multicast(void); |
| #endif |
| |
| /* bpf.c */ |
| #ifdef HAVE_BSD_NETWORK |
| void init_bpf(void); |
| void send_via_bpf(struct dhcp_packet *mess, size_t len, |
| struct in_addr iface_addr, struct ifreq *ifr); |
| void route_init(void); |
| void route_sock(void); |
| #endif |
| |
| /* bpf.c or netlink.c */ |
| int iface_enumerate(int family, void *parm, int (callback)()); |
| |
| /* dbus.c */ |
| #ifdef HAVE_DBUS |
| char *dbus_init(void); |
| void check_dbus_listeners(void); |
| void set_dbus_listeners(void); |
| # ifdef HAVE_DHCP |
| void emit_dbus_signal(int action, struct dhcp_lease *lease, char *hostname); |
| # endif |
| #endif |
| |
| /* ubus.c */ |
| #ifdef HAVE_UBUS |
| void ubus_init(void); |
| void set_ubus_listeners(void); |
| void check_ubus_listeners(void); |
| void ubus_event_bcast(const char *type, const char *mac, const char *ip, const char *name, const char *interface); |
| #endif |
| |
| /* ipset.c */ |
| #ifdef HAVE_IPSET |
| void ipset_init(void); |
| int add_to_ipset(const char *setname, const union all_addr *ipaddr, int flags, int remove); |
| #endif |
| |
| /* helper.c */ |
| #if defined(HAVE_SCRIPT) |
| int create_helper(int event_fd, int err_fd, uid_t uid, gid_t gid, long max_fd); |
| void helper_write(void); |
| void queue_script(int action, struct dhcp_lease *lease, |
| char *hostname, time_t now); |
| #ifdef HAVE_TFTP |
| void queue_tftp(off_t file_len, char *filename, union mysockaddr *peer); |
| #endif |
| void queue_arp(int action, unsigned char *mac, int maclen, |
| int family, union all_addr *addr); |
| int helper_buf_empty(void); |
| #endif |
| |
| /* tftp.c */ |
| #ifdef HAVE_TFTP |
| void tftp_request(struct listener *listen, time_t now); |
| void check_tftp_listeners(time_t now); |
| int do_tftp_script_run(void); |
| #endif |
| |
| /* conntrack.c */ |
| #ifdef HAVE_CONNTRACK |
| int get_incoming_mark(union mysockaddr *peer_addr, union all_addr *local_addr, |
| int istcp, unsigned int *markp); |
| #endif |
| |
| /* dhcp6.c */ |
| #ifdef HAVE_DHCP6 |
| void dhcp6_init(void); |
| void dhcp6_packet(time_t now); |
| struct dhcp_context *address6_allocate(struct dhcp_context *context, unsigned char *clid, int clid_len, int temp_addr, |
| unsigned int iaid, int serial, struct dhcp_netid *netids, int plain_range, struct in6_addr *ans); |
| struct dhcp_context *address6_available(struct dhcp_context *context, |
| struct in6_addr *taddr, |
| struct dhcp_netid *netids, |
| int plain_range); |
| struct dhcp_context *address6_valid(struct dhcp_context *context, |
| struct in6_addr *taddr, |
| struct dhcp_netid *netids, |
| int plain_range); |
| struct dhcp_config *config_find_by_address6(struct dhcp_config *configs, struct in6_addr *net, |
| int prefix, struct in6_addr *addr); |
| void make_duid(time_t now); |
| void dhcp_construct_contexts(time_t now); |
| void get_client_mac(struct in6_addr *client, int iface, unsigned char *mac, |
| unsigned int *maclenp, unsigned int *mactypep, time_t now); |
| #endif |
| |
| /* rfc3315.c */ |
| #ifdef HAVE_DHCP6 |
| unsigned short dhcp6_reply(struct dhcp_context *context, int interface, char *iface_name, |
| struct in6_addr *fallback, struct in6_addr *ll_addr, struct in6_addr *ula_addr, |
| size_t sz, struct in6_addr *client_addr, time_t now); |
| void relay_upstream6(struct dhcp_relay *relay, ssize_t sz, struct in6_addr *peer_address, |
| u32 scope_id, time_t now); |
| |
| unsigned short relay_reply6( struct sockaddr_in6 *peer, ssize_t sz, char *arrival_interface); |
| #endif |
| |
| /* dhcp-common.c */ |
| #ifdef HAVE_DHCP |
| void dhcp_common_init(void); |
| ssize_t recv_dhcp_packet(int fd, struct msghdr *msg); |
| struct dhcp_netid *run_tag_if(struct dhcp_netid *tags); |
| struct dhcp_netid *option_filter(struct dhcp_netid *tags, struct dhcp_netid *context_tags, |
| struct dhcp_opt *opts); |
| int match_netid(struct dhcp_netid *check, struct dhcp_netid *pool, int tagnotneeded); |
| char *strip_hostname(char *hostname); |
| void log_tags(struct dhcp_netid *netid, u32 xid); |
| int match_bytes(struct dhcp_opt *o, unsigned char *p, int len); |
| void dhcp_update_configs(struct dhcp_config *configs); |
| void display_opts(void); |
| int lookup_dhcp_opt(int prot, char *name); |
| int lookup_dhcp_len(int prot, int val); |
| struct dhcp_config *find_config(struct dhcp_config *configs, |
| struct dhcp_context *context, |
| unsigned char *clid, int clid_len, |
| unsigned char *hwaddr, int hw_len, |
| int hw_type, char *hostname, |
| struct dhcp_netid *filter); |
| int config_has_mac(struct dhcp_config *config, unsigned char *hwaddr, int len, int type); |
| #ifdef HAVE_LINUX_NETWORK |
| char *whichdevice(void); |
| void bindtodevice(char *device, int fd); |
| #endif |
| # ifdef HAVE_DHCP6 |
| void display_opts6(void); |
| # endif |
| void log_context(int family, struct dhcp_context *context); |
| void log_relay(int family, struct dhcp_relay *relay); |
| #endif |
| |
| /* outpacket.c */ |
| #ifdef HAVE_DHCP6 |
| void end_opt6(int container); |
| void reset_counter(void); |
| int save_counter(int newval); |
| void *expand(size_t headroom); |
| int new_opt6(int opt); |
| void *put_opt6(void *data, size_t len); |
| void put_opt6_long(unsigned int val); |
| void put_opt6_short(unsigned int val); |
| void put_opt6_char(unsigned int val); |
| void put_opt6_string(char *s); |
| #endif |
| |
| /* radv.c */ |
| #ifdef HAVE_DHCP6 |
| void ra_init(time_t now); |
| void icmp6_packet(time_t now); |
| time_t periodic_ra(time_t now); |
| void ra_start_unsolicited(time_t now, struct dhcp_context *context); |
| #endif |
| |
| /* slaac.c */ |
| #ifdef HAVE_DHCP6 |
| void slaac_add_addrs(struct dhcp_lease *lease, time_t now, int force); |
| time_t periodic_slaac(time_t now, struct dhcp_lease *leases); |
| void slaac_ping_reply(struct in6_addr *sender, unsigned char *packet, char *interface, struct dhcp_lease *leases); |
| #endif |
| |
| /* loop.c */ |
| #ifdef HAVE_LOOP |
| void loop_send_probes(void); |
| int detect_loop(char *query, int type); |
| #endif |
| |
| /* inotify.c */ |
| #ifdef HAVE_INOTIFY |
| void inotify_dnsmasq_init(void); |
| int inotify_check(time_t now); |
| void set_dynamic_inotify(int flag, int total_size, struct crec **rhash, int revhashsz); |
| #endif |
| |
| /* poll.c */ |
| void poll_reset(void); |
| int poll_check(int fd, short event); |
| void poll_listen(int fd, short event); |
| int do_poll(int timeout); |
| |
| /* rrfilter.c */ |
| size_t rrfilter(struct dns_header *header, size_t plen, int mode); |
| u16 *rrfilter_desc(int type); |
| int expand_workspace(unsigned char ***wkspc, int *szp, int new); |
| |
| /* edns0.c */ |
| unsigned char *find_pseudoheader(struct dns_header *header, size_t plen, |
| size_t *len, unsigned char **p, int *is_sign, int *is_last); |
| size_t add_pseudoheader(struct dns_header *header, size_t plen, unsigned char *limit, |
| unsigned short udp_sz, int optno, unsigned char *opt, size_t optlen, int set_do, int replace); |
| size_t add_do_bit(struct dns_header *header, size_t plen, unsigned char *limit); |
| size_t add_edns0_config(struct dns_header *header, size_t plen, unsigned char *limit, |
| union mysockaddr *source, time_t now, int *check_subnet, int *cacheable); |
| int check_source(struct dns_header *header, size_t plen, unsigned char *pseudoheader, union mysockaddr *peer); |
| |
| /* arp.c */ |
| int find_mac(union mysockaddr *addr, unsigned char *mac, int lazy, time_t now); |
| int do_arp_script_run(void); |
| |
| /* dump.c */ |
| #ifdef HAVE_DUMPFILE |
| void dump_init(void); |
| void dump_packet(int mask, void *packet, size_t len, union mysockaddr *src, union mysockaddr *dst); |
| #endif |