source4/dns_server/dns_server.h

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    DNS structures
   5
   6    Copyright (C) 2010 Kai Blin  <kai@samba.org>
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #ifndef __DNS_SERVER_H__
  23 #define __DNS_SERVER_H__
  24
  25 #include "librpc/gen_ndr/dns.h"
  26 #include "librpc/gen_ndr/ndr_dnsp.h"
  27
  28 struct tsocket_address;
  29
  30 struct dns_server_zone {
  31         struct dns_server_zone *prev, *next;
  32         const char *name;
  33         struct ldb_dn *dn;
  34 };
  35
  36 struct dns_server_tkey {
  37         const char *name;
  38         enum dns_tkey_mode mode;
  39         const char *algorithm;
  40         struct auth_session_info *session_info;
  41         struct gensec_security *gensec;
  42         bool complete;
  43 };
  44
  45 #define TKEY_BUFFER_SIZE 128
  46
  47 struct dns_server_tkey_store {
  48         struct dns_server_tkey **tkeys;
  49         uint16_t next_idx;
  50         uint16_t size;
  51 };
  52
  53 struct dns_server {
  54         struct task_server *task;
  55         struct ldb_context *samdb;
  56         struct dns_server_zone *zones;
  57         struct dns_server_tkey_store *tkeys;
  58         struct cli_credentials *server_credentials;
  59         uint16_t max_payload;
  60 };
  61
  62 struct dns_request_state {
  63         uint16_t flags;
  64         bool authenticated;
  65         bool sign;
  66         char *key_name;
  67         struct dns_res_rec *tsig;
  68         uint16_t tsig_error;
  69 };
  70
  71 struct tevent_req *dns_server_process_query_send(
  72         TALLOC_CTX *mem_ctx, struct tevent_context *ev,
  73         struct dns_server *dns, struct dns_request_state *req_state,
  74         const struct dns_name_packet *in);
  75 WERROR dns_server_process_query_recv(
  76         struct tevent_req *req, TALLOC_CTX *mem_ctx,
  77         struct dns_res_rec **answers,    uint16_t *ancount,
  78         struct dns_res_rec **nsrecs,     uint16_t *nscount,
  79         struct dns_res_rec **additional, uint16_t *arcount);
  80
  81 WERROR dns_server_process_update(struct dns_server *dns,
  82                                  struct dns_request_state *state,
  83                                  TALLOC_CTX *mem_ctx,
  84                                  struct dns_name_packet *in,
  85                                  struct dns_res_rec **prereqs,    uint16_t *prereq_count,
  86                                  struct dns_res_rec **updates,    uint16_t *update_count,
  87                                  struct dns_res_rec **additional, uint16_t *arcount);
  88
  89 uint8_t werr_to_dns_err(WERROR werror);
  90 bool dns_name_match(const char *zone, const char *name, size_t *host_part_len);
  91 bool dns_name_equal(const char *name1, const char *name2);
  92 bool dns_records_match(struct dnsp_DnssrvRpcRecord *rec1,
  93                        struct dnsp_DnssrvRpcRecord *rec2);
  94 bool dns_authorative_for_zone(struct dns_server *dns,
  95                               const char *name);
  96 WERROR dns_lookup_records(struct dns_server *dns,
  97                           TALLOC_CTX *mem_ctx,
  98                           struct ldb_dn *dn,
  99                           struct dnsp_DnssrvRpcRecord **records,
 100                           uint16_t *rec_count);
 101 WERROR dns_replace_records(struct dns_server *dns,
 102                            TALLOC_CTX *mem_ctx,
 103                            struct ldb_dn *dn,
 104                            bool needs_add,
 105                            const struct dnsp_DnssrvRpcRecord *records,
 106                            uint16_t rec_count);
 107 WERROR dns_name2dn(struct dns_server *dns,
 108                    TALLOC_CTX *mem_ctx,
 109                    const char *name,
 110                    struct ldb_dn **_dn);
 111 WERROR dns_generate_options(struct dns_server *dns,
 112                             TALLOC_CTX *mem_ctx,
 113                             struct dns_res_rec **options);
 114 struct dns_server_tkey *dns_find_tkey(struct dns_server_tkey_store *store,
 115                                       const char *name);
 116 WERROR dns_verify_tsig(struct dns_server *dns,
 117                        TALLOC_CTX *mem_ctx,
 118                        struct dns_request_state *state,
 119                        struct dns_name_packet *packet,
 120                        DATA_BLOB *in);
 121 WERROR dns_sign_tsig(struct dns_server *dns,
 122                      TALLOC_CTX *mem_ctx,
 123                      struct dns_request_state *state,
 124                      struct dns_name_packet *packet,
 125                      uint16_t error);
 126
 127 #define DNS_ERR(err_str) WERR_DNS_ERROR_RCODE_##err_str
 128 #endif /* __DNS_SERVER_H__ */