1/* 2 Unix SMB/CIFS implementation. 3 4 send out a name release request 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 27/* 28 send a nbt name release request 29*/ 30_PUBLIC_ struct nbt_name_request *nbt_name_release_send(struct nbt_name_socket *nbtsock, 31 struct nbt_name_release *io) 32{ 33 struct nbt_name_request *req; 34 struct nbt_name_packet *packet; 35 struct socket_address *dest; 36 37 packet = talloc_zero(nbtsock, struct nbt_name_packet); 38 if (packet == NULL) return NULL; 39 40 packet->qdcount = 1; 41 packet->arcount = 1; 42 packet->operation = NBT_OPCODE_RELEASE; 43 if (io->in.broadcast) { 44 packet->operation |= NBT_FLAG_BROADCAST; 45 } 46 47 packet->questions = talloc_array(packet, struct nbt_name_question, 1); 48 if (packet->questions == NULL) goto failed; 49 50 packet->questions[0].name = io->in.name; 51 packet->questions[0].question_type = NBT_QTYPE_NETBIOS; 52 packet->questions[0].question_class = NBT_QCLASS_IP; 53 54 packet->additional = talloc_array(packet, struct nbt_res_rec, 1); 55 if (packet->additional == NULL) goto failed; 56 57 packet->additional[0].name = io->in.name; 58 packet->additional[0].rr_type = NBT_QTYPE_NETBIOS; 59 packet->additional[0].rr_class = NBT_QCLASS_IP; 60 packet->additional[0].ttl = 0; 61 packet->additional[0].rdata.netbios.length = 6; 62 packet->additional[0].rdata.netbios.addresses = talloc_array(packet->additional, 63 struct nbt_rdata_address, 1); 64 if (packet->additional[0].rdata.netbios.addresses == NULL) goto failed; 65 packet->additional[0].rdata.netbios.addresses[0].nb_flags = io->in.nb_flags; 66 packet->additional[0].rdata.netbios.addresses[0].ipaddr = 67 talloc_strdup(packet->additional, io->in.address); 68 69 dest = socket_address_from_strings(packet, nbtsock->sock->backend_name, 70 io->in.dest_addr, io->in.dest_port); 71 if (dest == NULL) goto failed; 72 req = nbt_name_request_send(nbtsock, dest, packet, 73 io->in.timeout, io->in.retries, false); 74 if (req == NULL) goto failed; 75 76 talloc_free(packet); 77 return req; 78 79failed: 80 talloc_free(packet); 81 return NULL; 82} 83 84/* 85 wait for a release reply 86*/ 87_PUBLIC_ NTSTATUS nbt_name_release_recv(struct nbt_name_request *req, 88 TALLOC_CTX *mem_ctx, struct nbt_name_release *io) 89{ 90 NTSTATUS status; 91 struct nbt_name_packet *packet; 92 93 status = nbt_name_request_recv(req); 94 if (!NT_STATUS_IS_OK(status) || 95 req->num_replies == 0) { 96 talloc_free(req); 97 return status; 98 } 99 100 packet = req->replies[0].packet; 101 io->out.reply_from = talloc_steal(mem_ctx, req->replies[0].dest->addr); 102 103 if (packet->ancount != 1 || 104 packet->answers[0].rr_type != NBT_QTYPE_NETBIOS || 105 packet->answers[0].rr_class != NBT_QCLASS_IP) { 106 talloc_free(req); 107 return NT_STATUS_INVALID_NETWORK_RESPONSE; 108 } 109 110 io->out.rcode = packet->operation & NBT_RCODE; 111 io->out.name = packet->answers[0].name; 112 if (packet->answers[0].rdata.netbios.length < 6) { 113 talloc_free(req); 114 return NT_STATUS_INVALID_NETWORK_RESPONSE; 115 } 116 io->out.reply_addr = talloc_steal(mem_ctx, 117 packet->answers[0].rdata.netbios.addresses[0].ipaddr); 118 talloc_steal(mem_ctx, io->out.name.name); 119 talloc_steal(mem_ctx, io->out.name.scope); 120 121 talloc_free(req); 122 123 return NT_STATUS_OK; 124} 125 126/* 127 synchronous name release request 128*/ 129_PUBLIC_ NTSTATUS nbt_name_release(struct nbt_name_socket *nbtsock, 130 TALLOC_CTX *mem_ctx, struct nbt_name_release *io) 131{ 132 struct nbt_name_request *req = nbt_name_release_send(nbtsock, io); 133 return nbt_name_release_recv(req, mem_ctx, io); 134} 135