/* ** This file is a part of PassiveDNS. ** ** Copyright (C) 2010-2013, Edward Fjellskål ** ** 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; either version 2 of the License, or ** (at your option) any later version. ** ** 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, write to the Free Software ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. ** */ #ifndef DNS_H #define DNS_H #include /* Default flags for types to handle */ #define DNS_CHK_AAAA 0x00000001 #define DNS_CHK_A 0x00000002 #define DNS_CHK_PTR 0x00000004 #define DNS_CHK_CNAME 0x00000008 #define DNS_CHK_DNAME 0x00000010 #define DNS_CHK_NAPTR 0x00000020 #define DNS_CHK_RP 0x00000040 #define DNS_CHK_SRV 0x00000080 #define DNS_CHK_TXT 0x00000100 #define DNS_CHK_SOA 0x00000200 #define DNS_CHK_MX 0x00000400 #define DNS_CHK_NS 0x00000800 #define DNS_CHK_DNSSEC 0x00001000 #define DNS_CHK_LOC 0x00002000 #define DNS_CHK_SPF 0x00004000 #define DNS_CHK_SSHFP 0x00008000 #define DNS_CHK_HINFO 0x00010000 #define DNS_CHK_ALL 0x80000000 /* Default flags for Server Errors to handle */ #define DNS_SE_CHK_FORMERR 0x0001 #define DNS_SE_CHK_SERVFAIL 0x0002 #define DNS_SE_CHK_NXDOMAIN 0x0004 #define DNS_SE_CHK_NOTIMPL 0x0008 #define DNS_SE_CHK_REFUSED 0x0010 #define DNS_SE_CHK_YXDOMAIN 0x0020 #define DNS_SE_CHK_YXRRSET 0x0040 #define DNS_SE_CHK_NXRRSET 0x0080 #define DNS_SE_CHK_NOTAUTH 0x0100 #define DNS_SE_CHK_NOTZONE 0x0200 #define DNS_SE_CHK_ALL 0x8000 /* Flag for indicating an NXDOMAIN */ #define DNS_NXDOMAIN 0x01 /* Flags for which fields to print */ #define FIELD_TIMESTAMP_S 0x00001 #define FIELD_TIMESTAMP_MS 0x00002 #define FIELD_CLIENT 0x00004 #define FIELD_SERVER 0x00008 #define FIELD_CLASS 0x00010 #define FIELD_QUERY 0x00020 #define FIELD_TYPE 0x00040 #define FIELD_ANSWER 0x00080 #define FIELD_TTL 0x00100 #define FIELD_COUNT 0x00200 #define FIELD_TIMESTAMP_YMDHMS 0x00400 #define FIELD_PROTO 0x00800 #define FIELD_HOSTNAME 0x01000 #define FIELD_QUERY_LEN 0x02000 #define FIELD_ANSWER_LEN 0x04000 #define FIELD_CLT_HWADDR 0x08000 #define FIELD_SRV_HWADDR 0x10000 /* Static values for print_passet() */ #define PASSET_ERR_TTL 0 #define PASSET_ERR_COUNT 1 /* Syslog */ #define PDNS_IDENT "passivedns" /* JSON fields used when printing PDNS */ #define JSON_TIMESTAMP "timestamp" #define JSON_TIMESTAMP_S "timestamp_s" #define JSON_TIMESTAMP_MS "timestamp_ms" #define JSON_CLIENT "client" #define JSON_SERVER "server" #define JSON_PROTO "proto" #define JSON_CLASS "class" #define JSON_QUERY "query" #define JSON_QUERY_LEN "query_len" #define JSON_TYPE "type" #define JSON_ANSWER "answer" #define JSON_ANSWER_LEN "answer_len" #define JSON_TTL "ttl" #define JSON_COUNT "count" #define JSON_HOSTNAME "hostname" /* To avoid spaming the logfile with duplicate dns info * we only print a dns record one time each 24H. This way * you will get a last seen timestamp update once a day * at least. If the record changes, it will be classified * as a new record, and printent. If a record expires and * it has been updated since last_print time, it will be * printed again. */ #define DNSPRINTTIME 86400 /* 24H = 86400 sec */ /* How long we should hold a dns record in our internal * cache. It should preferably not be less than DNSPRINTTIME, * as that will make it possible to get more than one instance * of the record each day in the logfile. That said, setting * DNSCACHETIMEOUT to DNSPRINTTIME/2 etc, might help memory * usage if that is a concern AND you probably will get a better * granularity on the DNS time stamps in the log file. * My recomendations are DNSPRINTTIME == 24h and * DNSCACHETIMEOUT == 12h. */ #define DNSCACHETIMEOUT 43200 /* 12h=43200sec */ /* HASH: * [DOMAIN_HASH_BUCKET]_ * |__[Q-TYPE_BUCKET]_<--- PTR,MX,A... * |__[RESPONCE-NAME] <--- FOR PTR is the IPv4/IPv6 */ typedef struct _pdns_asset { struct timeval first_seen; /* First seen (unix timestamp) */ struct timeval last_seen; /* Last seen (unix timestamp) */ struct timeval last_print; /* Last time asset was printet */ struct ldns_struct_rr *rr; /* PTR,MX,TXT,A,AAAA... */ uint64_t seen; /* Number of times seen */ unsigned char *answer; /* Answer, like 8.8.8.8 or 2001:67c:21e0::16 */ uint32_t af; /* IP version (4/6) AF_INET */ struct in6_addr sip; /* DNS Server IP (v4/6) */ u_char smac[6]; /* DNS Server MAC address */ struct in6_addr cip; /* DNS Client IP (v4/6) */ u_char cmac[6]; /* DNS Client MAC address */ struct _pdns_asset *next; /* Next dns asset */ struct _pdns_asset *prev; /* Prev dns asset */ } pdns_asset; typedef struct _pdns_record { struct timeval first_seen; /* First seen (unix timestamp) */ struct timeval last_seen; /* Last seen (unix timestamp) */ struct timeval last_print; /* Last time record(NXD) was printet */ uint64_t seen; /* Number of times seen */ unsigned char *qname; /* Query name (gamelinux.org) */ uint8_t nxflag; /* Flag to indicate if this is a NXDOMAIN */ uint32_t af; /* IP version (4/6) AF_INET */ struct in6_addr sip; /* DNS Server IP (v4/6) */ u_char smac[6]; /* DNS Server MAC address */ struct in6_addr cip; /* DNS Client IP (v4/6) */ u_char cmac[6]; /* DNS Client MAC address */ uint8_t proto; /* Protocol */ pdns_asset *passet; /* Head of dns assets */ struct _pdns_record *next; /* Next dns record */ struct _pdns_record *prev; /* Prev dns record */ } pdns_record; /* Declare */ int process_dns_answer (packetinfo *pi, ldns_pkt *decoded_dns); int cache_dns_objects (packetinfo *pi, ldns_rdf *rdf_data, ldns_buffer *buff, ldns_pkt *dns_pkt); pdns_record *get_pdns_record (uint64_t dnshash, packetinfo *pi, unsigned char *domain_name); const char *u_ntop (const struct in6_addr ip_addr, int af, char *dest); void dns_parser (packetinfo *pi); void update_pdns_record_asset (packetinfo *pi, pdns_record *pr, ldns_rr *rr, unsigned char *rdomain_name); void print_passet (pdns_record *l, pdns_asset *p, ldns_rr *rr, ldns_rdf *lname, uint16_t rcode); void expire_dns_assets (pdns_record *pdnsr, time_t expire_t); void expire_dns_records(); void expire_all_dns_records(); void delete_dns_record (pdns_record *pdnsr, pdns_record **bucket_ptr); void delete_dns_asset (pdns_asset **passet_head, pdns_asset *passet); void update_config_mem_counters(); void parse_field_flags (char *args); void parse_dns_flags (char *args); void update_dns_stats(packetinfo *pi, uint8_t code); uint16_t pdns_chk_dnsfe(uint16_t rcode); #endif /* DNS_H */