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 "../libcli/nbt/nbt_proto.h"
  25 #include "lib/socket/socket.h"
  26 #include "param/param.h"
  27
  28 /**
  29   send a nbt name query
  30 */
  31 _PUBLIC_ struct nbt_name_request *nbt_name_query_send(struct nbt_name_socket *nbtsock,
  32                                              struct nbt_name_query *io)
  33 {
  34         struct nbt_name_request *req;
  35         struct nbt_name_packet *packet;
  36         struct socket_address *dest;
  37
  38         packet = talloc_zero(nbtsock, struct nbt_name_packet);
  39         if (packet == NULL) return NULL;
  40
  41         packet->qdcount = 1;
  42         packet->operation = NBT_OPCODE_QUERY;
  43         if (io->in.broadcast) {
  44                 packet->operation |= NBT_FLAG_BROADCAST;
  45         }
  46         if (io->in.wins_lookup) {
  47                 packet->operation |= NBT_FLAG_RECURSION_DESIRED;
  48         }
  49
  50         packet->questions = talloc_array(packet, struct nbt_name_question, 1);
  51         if (packet->questions == NULL) goto failed;
  52
  53         packet->questions[0].name = io->in.name;
  54         packet->questions[0].question_type = NBT_QTYPE_NETBIOS;
  55         packet->questions[0].question_class = NBT_QCLASS_IP;
  56
  57         dest = socket_address_from_strings(packet, nbtsock->sock->backend_name,
  58                                            io->in.dest_addr, io->in.dest_port);
  59         if (dest == NULL) goto failed;
  60         req = nbt_name_request_send(nbtsock, dest, packet,
  61                                     io->in.timeout, io->in.retries, false);
  62         if (req == NULL) goto failed;
  63
  64         talloc_free(packet);
  65         return req;
  66
  67 failed:
  68         talloc_free(packet);
  69         return NULL;
  70 }
  71
  72 /**
  73   wait for a name query reply
  74 */
  75 _PUBLIC_ NTSTATUS nbt_name_query_recv(struct nbt_name_request *req,
  76                              TALLOC_CTX *mem_ctx, struct nbt_name_query *io)
  77 {
  78         NTSTATUS status;
  79         struct nbt_name_packet *packet;
  80         int i;
  81
  82         status = nbt_name_request_recv(req);
  83         if (!NT_STATUS_IS_OK(status) ||
  84             req->num_replies == 0) {
  85                 talloc_free(req);
  86                 return status;
  87         }
  88
  89         packet = req->replies[0].packet;
  90         io->out.reply_from = talloc_steal(mem_ctx, req->replies[0].dest->addr);
  91
  92         if ((packet->operation & NBT_RCODE) != 0) {
  93                 status = nbt_rcode_to_ntstatus(packet->operation & NBT_RCODE);
  94                 talloc_free(req);
  95                 return status;
  96         }
  97
  98         if (packet->ancount != 1 ||
  99             packet->answers[0].rr_type != NBT_QTYPE_NETBIOS ||
 100             packet->answers[0].rr_class != NBT_QCLASS_IP) {
 101                 talloc_free(req);
 102                 return status;
 103         }
 104
 105         io->out.name = packet->answers[0].name;
 106         io->out.num_addrs = packet->answers[0].rdata.netbios.length / 6;
 107         io->out.reply_addrs = talloc_array(mem_ctx, const char *, io->out.num_addrs+1);
 108         if (io->out.reply_addrs == NULL) {
 109                 talloc_free(req);
 110                 return NT_STATUS_NO_MEMORY;
 111         }
 112
 113         for (i=0;i<io->out.num_addrs;i++) {
 114                 io->out.reply_addrs[i] = talloc_steal(io->out.reply_addrs,
 115                                                       packet->answers[0].rdata.netbios.addresses[i].ipaddr);
 116         }
 117         io->out.reply_addrs[i] = NULL;
 118
 119         talloc_steal(mem_ctx, io->out.name.name);
 120         talloc_steal(mem_ctx, io->out.name.scope);
 121
 122         talloc_free(req);
 123
 124         return NT_STATUS_OK;
 125 }
 126
 127 /**
 128   wait for a name query reply
 129 */
 130 _PUBLIC_ NTSTATUS nbt_name_query(struct nbt_name_socket *nbtsock,
 131                         TALLOC_CTX *mem_ctx, struct nbt_name_query *io)
 132 {
 133         struct nbt_name_request *req = nbt_name_query_send(nbtsock, io);
 134         return nbt_name_query_recv(req, mem_ctx, io);
 135 }
 136
 137
 138 /**
 139   send a nbt name status
 140 */
 141 _PUBLIC_ struct nbt_name_request *nbt_name_status_send(struct nbt_name_socket *nbtsock,
 142                                               struct nbt_name_status *io)
 143 {
 144         struct nbt_name_request *req;
 145         struct nbt_name_packet *packet;
 146         struct socket_address *dest;
 147
 148         packet = talloc_zero(nbtsock, struct nbt_name_packet);
 149         if (packet == NULL) return NULL;
 150
 151         packet->qdcount = 1;
 152         packet->operation = NBT_OPCODE_QUERY;
 153
 154         packet->questions = talloc_array(packet, struct nbt_name_question, 1);
 155         if (packet->questions == NULL) goto failed;
 156
 157         packet->questions[0].name = io->in.name;
 158         packet->questions[0].question_type = NBT_QTYPE_STATUS;
 159         packet->questions[0].question_class = NBT_QCLASS_IP;
 160
 161         dest = socket_address_from_strings(packet, nbtsock->sock->backend_name,
 162                                            io->in.dest_addr, io->in.dest_port);
 163         if (dest == NULL) goto failed;
 164         req = nbt_name_request_send(nbtsock, dest, packet,
 165                                     io->in.timeout, io->in.retries, false);
 166         if (req == NULL) goto failed;
 167
 168         talloc_free(packet);
 169         return req;
 170
 171 failed:
 172         talloc_free(packet);
 173         return NULL;
 174 }
 175
 176 /**
 177   wait for a name status reply
 178 */
 179 _PUBLIC_ NTSTATUS nbt_name_status_recv(struct nbt_name_request *req,
 180                              TALLOC_CTX *mem_ctx, struct nbt_name_status *io)
 181 {
 182         NTSTATUS status;
 183         struct nbt_name_packet *packet;
 184         int i;
 185
 186         status = nbt_name_request_recv(req);
 187         if (!NT_STATUS_IS_OK(status) ||
 188             req->num_replies == 0) {
 189                 talloc_free(req);
 190                 return status;
 191         }
 192
 193         packet = req->replies[0].packet;
 194         io->out.reply_from = talloc_steal(mem_ctx, req->replies[0].dest->addr);
 195
 196         if ((packet->operation & NBT_RCODE) != 0) {
 197                 status = nbt_rcode_to_ntstatus(packet->operation & NBT_RCODE);
 198                 talloc_free(req);
 199                 return status;
 200         }
 201
 202         if (packet->ancount != 1 ||
 203             packet->answers[0].rr_type != NBT_QTYPE_STATUS ||
 204             packet->answers[0].rr_class != NBT_QCLASS_IP) {
 205                 talloc_free(req);
 206                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
 207         }
 208
 209         io->out.name = packet->answers[0].name;
 210         talloc_steal(mem_ctx, io->out.name.name);
 211         talloc_steal(mem_ctx, io->out.name.scope);
 212
 213         io->out.status = packet->answers[0].rdata.status;
 214         talloc_steal(mem_ctx, io->out.status.names);
 215         for (i=0;i<io->out.status.num_names;i++) {
 216                 talloc_steal(io->out.status.names, io->out.status.names[i].name);
 217         }
 218
 219
 220         talloc_free(req);
 221
 222         return NT_STATUS_OK;
 223 }
 224
 225 /**
 226   wait for a name status reply
 227 */
 228 _PUBLIC_ NTSTATUS nbt_name_status(struct nbt_name_socket *nbtsock,
 229                         TALLOC_CTX *mem_ctx, struct nbt_name_status *io)
 230 {
 231         struct nbt_name_request *req = nbt_name_status_send(nbtsock, io);
 232         return nbt_name_status_recv(req, mem_ctx, io);
 233 }
 234
 235