/* Linux DNS client library implementation Copyright (C) 2006 Krishna Ganugapati Copyright (C) 2006 Gerald Carter ** NOTE! The following LGPL license applies to the libaddns ** library. This does NOT imply that all of Samba is released ** under the LGPL This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, see . */ #ifndef _DNS_H #define _DNS_H #include "../replace/replace.h" #include "system/network.h" #include "system/kerberos.h" #include "system/gssapi.h" /* make sure we have included the correct config.h */ #ifndef NO_CONFIG_H /* for some tests */ #ifndef CONFIG_H_IS_FROM_SAMBA #error "make sure you have removed all config.h files from standalone builds!" #error "the included config.h isn't from samba!" #endif #endif /* NO_CONFIG_H */ #include #include #include #include #include "dnserr.h" #define DNS_TCP 1 #define DNS_UDP 2 #define DNS_OPCODE_UPDATE 1 /* DNS Class Types */ #define DNS_CLASS_IN 1 #define DNS_CLASS_ANY 255 #define DNS_CLASS_NONE 254 /* DNS RR Types */ #define DNS_RR_A 1 #define DNS_TCP_PORT 53 #define DNS_UDP_PORT 53 #define QTYPE_A 1 #define QTYPE_NS 2 #define QTYPE_MD 3 #define QTYPE_CNAME 5 #define QTYPE_SOA 6 #define QTYPE_AAAA 28 #define QTYPE_ANY 255 #define QTYPE_TKEY 249 #define QTYPE_TSIG 250 /* MF 4 a mail forwarder (Obsolete - use MX) CNAME 5 the canonical name for an alias SOA 6 marks the start of a zone of authority MB 7 a mailbox domain name (EXPERIMENTAL) MG 8 a mail group member (EXPERIMENTAL) MR 9 a mail rename domain name (EXPERIMENTAL) NULL 10 a null RR (EXPERIMENTAL) WKS 11 a well known service description PTR 12 a domain name pointer HINFO 13 host information MINFO 14 mailbox or mail list information MX 15 mail exchange TXT 16 text strings */ #define QR_QUERY 0x0000 #define QR_RESPONSE 0x0001 #define OPCODE_QUERY 0x00 #define OPCODE_IQUERY 0x01 #define OPCODE_STATUS 0x02 #define AA 1 #define RECURSION_DESIRED 0x01 #define RCODE_NOERROR 0 #define RCODE_FORMATERROR 1 #define RCODE_SERVER_FAILURE 2 #define RCODE_NAME_ERROR 3 #define RCODE_NOTIMPLEMENTED 4 #define RCODE_REFUSED 5 #define SENDBUFFER_SIZE 65536 #define RECVBUFFER_SIZE 65536 /* * TKEY Modes from rfc2930 */ #define DNS_TKEY_MODE_SERVER 1 #define DNS_TKEY_MODE_DH 2 #define DNS_TKEY_MODE_GSSAPI 3 #define DNS_TKEY_MODE_RESOLVER 4 #define DNS_TKEY_MODE_DELETE 5 #define DNS_ONE_DAY_IN_SECS 86400 #define DNS_TEN_HOURS_IN_SECS 36000 #define SOCKET_ERROR -1 #define INVALID_SOCKET -1 #define DNS_NO_ERROR 0 #define DNS_FORMAT_ERROR 1 #define DNS_SERVER_FAILURE 2 #define DNS_NAME_ERROR 3 #define DNS_NOT_IMPLEMENTED 4 #define DNS_REFUSED 5 typedef long HANDLE; enum dns_ServerType { DNS_SRV_ANY, DNS_SRV_WIN2000, DNS_SRV_WIN2003 }; struct dns_domain_label { struct dns_domain_label *next; char *label; size_t len; }; struct dns_domain_name { struct dns_domain_label *pLabelList; }; struct dns_question { struct dns_domain_name *name; uint16_t q_type; uint16_t q_class; }; /* * Before changing the definition of dns_zone, look * dns_marshall_update_request(), we rely on this being the same as * dns_question right now. */ struct dns_zone { struct dns_domain_name *name; uint16_t z_type; uint16_t z_class; }; struct dns_rrec { struct dns_domain_name *name; uint16_t type; uint16_t r_class; uint32_t ttl; uint16_t data_length; uint8_t *data; }; struct dns_tkey_record { struct dns_domain_name *algorithm; time_t inception; time_t expiration; uint16_t mode; uint16_t error; uint16_t key_length; uint8_t *key; }; struct dns_request { uint16_t id; uint16_t flags; uint16_t num_questions; uint16_t num_answers; uint16_t num_auths; uint16_t num_additionals; struct dns_question **questions; struct dns_rrec **answers; struct dns_rrec **auths; struct dns_rrec **additionals; }; /* * Before changing the definition of dns_update_request, look * dns_marshall_update_request(), we rely on this being the same as * dns_request right now. */ struct dns_update_request { uint16_t id; uint16_t flags; uint16_t num_zones; uint16_t num_preqs; uint16_t num_updates; uint16_t num_additionals; struct dns_zone **zones; struct dns_rrec **preqs; struct dns_rrec **updates; struct dns_rrec **additionals; }; struct dns_connection { int32_t hType; int s; struct sockaddr RecvAddr; }; struct dns_buffer { uint8_t *data; size_t size; size_t offset; DNS_ERROR error; }; /* from dnsutils.c */ DNS_ERROR dns_domain_name_from_string( TALLOC_CTX *mem_ctx, const char *pszDomainName, struct dns_domain_name **presult ); char *dns_generate_keyname( TALLOC_CTX *mem_ctx ); /* from dnsrecord.c */ DNS_ERROR dns_create_query( TALLOC_CTX *mem_ctx, const char *name, uint16_t q_type, uint16_t q_class, struct dns_request **preq ); DNS_ERROR dns_create_update( TALLOC_CTX *mem_ctx, const char *name, struct dns_update_request **preq ); DNS_ERROR dns_create_probe(TALLOC_CTX *mem_ctx, const char *zone, const char *host, int num_ips, const struct sockaddr_storage *sslist, struct dns_update_request **preq); DNS_ERROR dns_create_rrec(TALLOC_CTX *mem_ctx, const char *name, uint16_t type, uint16_t r_class, uint32_t ttl, uint16_t data_length, uint8_t *data, struct dns_rrec **prec); DNS_ERROR dns_add_rrec(TALLOC_CTX *mem_ctx, struct dns_rrec *rec, uint16_t *num_records, struct dns_rrec ***records); DNS_ERROR dns_create_tkey_record(TALLOC_CTX *mem_ctx, const char *keyname, const char *algorithm_name, time_t inception, time_t expiration, uint16_t mode, uint16_t error, uint16_t key_length, const uint8_t *key, struct dns_rrec **prec); DNS_ERROR dns_create_name_in_use_record(TALLOC_CTX *mem_ctx, const char *name, const struct sockaddr_storage *ip, struct dns_rrec **prec); DNS_ERROR dns_create_delete_record(TALLOC_CTX *mem_ctx, const char *name, uint16_t type, uint16_t r_class, struct dns_rrec **prec); DNS_ERROR dns_create_name_not_in_use_record(TALLOC_CTX *mem_ctx, const char *name, uint32_t type, struct dns_rrec **prec); DNS_ERROR dns_create_a_record(TALLOC_CTX *mem_ctx, const char *host, uint32_t ttl, const struct sockaddr_storage *pss, struct dns_rrec **prec); DNS_ERROR dns_create_aaaa_record(TALLOC_CTX *mem_ctx, const char *host, uint32_t ttl, const struct sockaddr_storage *pss, struct dns_rrec **prec); DNS_ERROR dns_unmarshall_tkey_record(TALLOC_CTX *mem_ctx, struct dns_rrec *rec, struct dns_tkey_record **ptkey); DNS_ERROR dns_create_tsig_record(TALLOC_CTX *mem_ctx, const char *keyname, const char *algorithm_name, time_t time_signed, uint16_t fudge, uint16_t mac_length, const uint8_t *mac, uint16_t original_id, uint16_t error, struct dns_rrec **prec); DNS_ERROR dns_add_rrec(TALLOC_CTX *mem_ctx, struct dns_rrec *rec, uint16_t *num_records, struct dns_rrec ***records); DNS_ERROR dns_create_update_request(TALLOC_CTX *mem_ctx, const char *domainname, const char *hostname, const struct sockaddr_storage *ip_addr, size_t num_adds, struct dns_update_request **preq); /* from dnssock.c */ DNS_ERROR dns_open_connection( const char *nameserver, int32_t dwType, TALLOC_CTX *mem_ctx, struct dns_connection **conn ); DNS_ERROR dns_send(struct dns_connection *conn, const struct dns_buffer *buf); DNS_ERROR dns_receive(TALLOC_CTX *mem_ctx, struct dns_connection *conn, struct dns_buffer **presult); DNS_ERROR dns_transaction(TALLOC_CTX *mem_ctx, struct dns_connection *conn, const struct dns_request *req, struct dns_request **resp); DNS_ERROR dns_update_transaction(TALLOC_CTX *mem_ctx, struct dns_connection *conn, struct dns_update_request *up_req, struct dns_update_request **up_resp); /* from dnsmarshall.c */ struct dns_buffer *dns_create_buffer(TALLOC_CTX *mem_ctx); void dns_marshall_buffer(struct dns_buffer *buf, const uint8_t *data, size_t len); void dns_marshall_uint16(struct dns_buffer *buf, uint16_t val); void dns_marshall_uint32(struct dns_buffer *buf, uint32_t val); void dns_unmarshall_buffer(struct dns_buffer *buf, uint8_t *data, size_t len); void dns_unmarshall_uint16(struct dns_buffer *buf, uint16_t *val); void dns_unmarshall_uint32(struct dns_buffer *buf, uint32_t *val); void dns_unmarshall_domain_name(TALLOC_CTX *mem_ctx, struct dns_buffer *buf, struct dns_domain_name **pname); void dns_marshall_domain_name(struct dns_buffer *buf, const struct dns_domain_name *name); void dns_unmarshall_domain_name(TALLOC_CTX *mem_ctx, struct dns_buffer *buf, struct dns_domain_name **pname); DNS_ERROR dns_marshall_request(TALLOC_CTX *mem_ctx, const struct dns_request *req, struct dns_buffer **pbuf); DNS_ERROR dns_unmarshall_request(TALLOC_CTX *mem_ctx, struct dns_buffer *buf, struct dns_request **preq); DNS_ERROR dns_marshall_update_request(TALLOC_CTX *mem_ctx, struct dns_update_request *update, struct dns_buffer **pbuf); DNS_ERROR dns_unmarshall_update_request(TALLOC_CTX *mem_ctx, struct dns_buffer *buf, struct dns_update_request **pupreq); struct dns_request *dns_update2request(struct dns_update_request *update); struct dns_update_request *dns_request2update(struct dns_request *request); uint16_t dns_response_code(uint16_t flags); const char *dns_errstr(DNS_ERROR err); /* from dnsgss.c */ #ifdef HAVE_GSSAPI void display_status( const char *msg, OM_uint32 maj_stat, OM_uint32 min_stat ); DNS_ERROR dns_negotiate_sec_ctx( const char *target_realm, const char *servername, const char *keyname, gss_ctx_id_t *gss_ctx, enum dns_ServerType srv_type ); DNS_ERROR dns_sign_update(struct dns_update_request *req, gss_ctx_id_t gss_ctx, const char *keyname, const char *algorithmname, time_t time_signed, uint16_t fudge); #endif /* HAVE_GSSAPI */ #endif /* _DNS_H */