source4/libcli/nbt/namequery.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    make nbt name query requests
   5
   6    Copyright (C) Andrew Tridgell 2005
   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 #include "includes.h"
  23 #include "libcli/nbt/libnbt.h"
  24 #include "lib/socket/socket.h"
  25
  26 /**
  27   send a nbt name query
  28 */
  29 _PUBLIC_ struct nbt_name_request *nbt_name_query_send(struct nbt_name_socket *nbtsock,
  30                                              struct nbt_name_query *io)
  31 {
  32         struct nbt_name_request *req;
  33         struct nbt_name_packet *packet;
  34         struct socket_address *dest;
  35
  36         packet = talloc_zero(nbtsock, struct nbt_name_packet);
  37         if (packet == NULL) return NULL;
  38
  39         packet->qdcount = 1;
  40         packet->operation = NBT_OPCODE_QUERY;
  41         if (io->in.broadcast) {
  42                 packet->operation |= NBT_FLAG_BROADCAST;
  43         }
  44         if (io->in.wins_lookup) {
  45                 packet->operation |= NBT_FLAG_RECURSION_DESIRED;
  46         }
  47
  48         packet->questions = talloc_array(packet, struct nbt_name_question, 1);
  49         if (packet->questions == NULL) goto failed;
  50
  51         packet->questions[0].name = io->in.name;
  52         packet->questions[0].question_type = NBT_QTYPE_NETBIOS;
  53         packet->questions[0].question_class = NBT_QCLASS_IP;
  54
  55         dest = socket_address_from_strings(packet, nbtsock->sock->backend_name,
  56                                            io->in.dest_addr, lp_nbt_port());
  57         if (dest == NULL) goto failed;
  58         req = nbt_name_request_send(nbtsock, dest, packet,
  59                                     io->in.timeout, io->in.retries, False);
  60         if (req == NULL) goto failed;
  61
  62         talloc_free(packet);
  63         return req;
  64
  65 failed:
  66         talloc_free(packet);
  67         return NULL;
  68 }
  69
  70 /**
  71   wait for a name query reply
  72 */
  73 _PUBLIC_ NTSTATUS nbt_name_query_recv(struct nbt_name_request *req,
  74                              TALLOC_CTX *mem_ctx, struct nbt_name_query *io)
  75 {
  76         NTSTATUS status;
  77         struct nbt_name_packet *packet;
  78         int i;
  79
  80         status = nbt_name_request_recv(req);
  81         if (!NT_STATUS_IS_OK(status) ||
  82             req->num_replies == 0) {
  83                 talloc_free(req);
  84                 return status;
  85         }
  86
  87         packet = req->replies[0].packet;
  88         io->out.reply_from = talloc_steal(mem_ctx, req->replies[0].dest->addr);
  89
  90         if ((packet->operation & NBT_RCODE) != 0) {
  91                 status = nbt_rcode_to_ntstatus(packet->operation & NBT_RCODE);
  92                 talloc_free(req);
  93                 return status;
  94         }
  95
  96         if (packet->ancount != 1 ||
  97             packet->answers[0].rr_type != NBT_QTYPE_NETBIOS ||
  98             packet->answers[0].rr_class != NBT_QCLASS_IP) {
  99                 talloc_free(req);
 100                 return status;
 101         }
 102
 103         io->out.name = packet->answers[0].name;
 104         io->out.num_addrs = packet->answers[0].rdata.netbios.length / 6;
 105         io->out.reply_addrs = talloc_array(mem_ctx, const char *, io->out.num_addrs+1);
 106         if (io->out.reply_addrs == NULL) {
 107                 talloc_free(req);
 108                 return NT_STATUS_NO_MEMORY;
 109         }
 110
 111         for (i=0;i<io->out.num_addrs;i++) {
 112                 io->out.reply_addrs[i] = talloc_steal(io->out.reply_addrs,
 113                                                       packet->answers[0].rdata.netbios.addresses[i].ipaddr);
 114         }
 115         io->out.reply_addrs[i] = NULL;
 116
 117         talloc_steal(mem_ctx, io->out.name.name);
 118         talloc_steal(mem_ctx, io->out.name.scope);
 119
 120         talloc_free(req);
 121
 122         return NT_STATUS_OK;
 123 }
 124
 125 /**
 126   wait for a name query reply
 127 */
 128 _PUBLIC_ NTSTATUS nbt_name_query(struct nbt_name_socket *nbtsock,
 129                         TALLOC_CTX *mem_ctx, struct nbt_name_query *io)
 130 {
 131         struct nbt_name_request *req = nbt_name_query_send(nbtsock, io);
 132         return nbt_name_query_recv(req, mem_ctx, io);
 133 }
 134
 135
 136 /**
 137   send a nbt name status
 138 */
 139 _PUBLIC_ struct nbt_name_request *nbt_name_status_send(struct nbt_name_socket *nbtsock,
 140                                               struct nbt_name_status *io)
 141 {
 142         struct nbt_name_request *req;
 143         struct nbt_name_packet *packet;
 144         struct socket_address *dest;
 145
 146         packet = talloc_zero(nbtsock, struct nbt_name_packet);
 147         if (packet == NULL) return NULL;
 148
 149         packet->qdcount = 1;
 150         packet->operation = NBT_OPCODE_QUERY;
 151
 152         packet->questions = talloc_array(packet, struct nbt_name_question, 1);
 153         if (packet->questions == NULL) goto failed;
 154
 155         packet->questions[0].name = io->in.name;
 156         packet->questions[0].question_type = NBT_QTYPE_STATUS;
 157         packet->questions[0].question_class = NBT_QCLASS_IP;
 158
 159         dest = socket_address_from_strings(packet, nbtsock->sock->backend_name,
 160                                            io->in.dest_addr, lp_nbt_port());
 161         if (dest == NULL) goto failed;
 162         req = nbt_name_request_send(nbtsock, dest, packet,
 163                                     io->in.timeout, io->in.retries, False);
 164         if (req == NULL) goto failed;
 165
 166         talloc_free(packet);
 167         return req;
 168
 169 failed:
 170         talloc_free(packet);
 171         return NULL;
 172 }
 173
 174 /**
 175   wait for a name status reply
 176 */
 177 _PUBLIC_ NTSTATUS nbt_name_status_recv(struct nbt_name_request *req,
 178                              TALLOC_CTX *mem_ctx, struct nbt_name_status *io)
 179 {
 180         NTSTATUS status;
 181         struct nbt_name_packet *packet;
 182         int i;
 183
 184         status = nbt_name_request_recv(req);
 185         if (!NT_STATUS_IS_OK(status) ||
 186             req->num_replies == 0) {
 187                 talloc_free(req);
 188                 return status;
 189         }
 190
 191         packet = req->replies[0].packet;
 192         io->out.reply_from = talloc_steal(mem_ctx, req->replies[0].dest->addr);
 193
 194         if ((packet->operation & NBT_RCODE) != 0) {
 195                 status = nbt_rcode_to_ntstatus(packet->operation & NBT_RCODE);
 196                 talloc_free(req);
 197                 return status;
 198         }
 199
 200         if (packet->ancount != 1 ||
 201             packet->answers[0].rr_type != NBT_QTYPE_STATUS ||
 202             packet->answers[0].rr_class != NBT_QCLASS_IP) {
 203                 talloc_free(req);
 204                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
 205         }
 206
 207         io->out.name = packet->answers[0].name;
 208         talloc_steal(mem_ctx, io->out.name.name);
 209         talloc_steal(mem_ctx, io->out.name.scope);
 210
 211         io->out.status = packet->answers[0].rdata.status;
 212         talloc_steal(mem_ctx, io->out.status.names);
 213         for (i=0;i<io->out.status.num_names;i++) {
 214                 talloc_steal(io->out.status.names, io->out.status.names[i].name);
 215         }
 216
 217
 218         talloc_free(req);
 219
 220         return NT_STATUS_OK;
 221 }
 222
 223 /**
 224   wait for a name status reply
 225 */
 226 _PUBLIC_ NTSTATUS nbt_name_status(struct nbt_name_socket *nbtsock,
 227                         TALLOC_CTX *mem_ctx, struct nbt_name_status *io)
 228 {
 229         struct nbt_name_request *req = nbt_name_status_send(nbtsock, io);
 230         return nbt_name_status_recv(req, mem_ctx, io);
 231 }
 232
 233