/* Unix SMB/CIFS implementation. send out a name release request Copyright (C) Andrew Tridgell 2005 This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include "includes.h" #include "../libcli/nbt/libnbt.h" #include "../libcli/nbt/nbt_proto.h" #include "lib/socket/socket.h" /* send a nbt name release request */ _PUBLIC_ struct nbt_name_request *nbt_name_release_send(struct nbt_name_socket *nbtsock, struct nbt_name_release *io) { struct nbt_name_request *req; struct nbt_name_packet *packet; struct socket_address *dest; packet = talloc_zero(nbtsock, struct nbt_name_packet); if (packet == NULL) return NULL; packet->qdcount = 1; packet->arcount = 1; packet->operation = NBT_OPCODE_RELEASE; if (io->in.broadcast) { packet->operation |= NBT_FLAG_BROADCAST; } packet->questions = talloc_array(packet, struct nbt_name_question, 1); if (packet->questions == NULL) goto failed; packet->questions[0].name = io->in.name; packet->questions[0].question_type = NBT_QTYPE_NETBIOS; packet->questions[0].question_class = NBT_QCLASS_IP; packet->additional = talloc_array(packet, struct nbt_res_rec, 1); if (packet->additional == NULL) goto failed; packet->additional[0].name = io->in.name; packet->additional[0].rr_type = NBT_QTYPE_NETBIOS; packet->additional[0].rr_class = NBT_QCLASS_IP; packet->additional[0].ttl = 0; packet->additional[0].rdata.netbios.length = 6; packet->additional[0].rdata.netbios.addresses = talloc_array(packet->additional, struct nbt_rdata_address, 1); if (packet->additional[0].rdata.netbios.addresses == NULL) goto failed; packet->additional[0].rdata.netbios.addresses[0].nb_flags = io->in.nb_flags; packet->additional[0].rdata.netbios.addresses[0].ipaddr = talloc_strdup(packet->additional, io->in.address); dest = socket_address_from_strings(packet, nbtsock->sock->backend_name, io->in.dest_addr, io->in.dest_port); if (dest == NULL) goto failed; req = nbt_name_request_send(nbtsock, dest, packet, io->in.timeout, io->in.retries, false); if (req == NULL) goto failed; talloc_free(packet); return req; failed: talloc_free(packet); return NULL; } /* wait for a release reply */ _PUBLIC_ NTSTATUS nbt_name_release_recv(struct nbt_name_request *req, TALLOC_CTX *mem_ctx, struct nbt_name_release *io) { NTSTATUS status; struct nbt_name_packet *packet; status = nbt_name_request_recv(req); if (!NT_STATUS_IS_OK(status) || req->num_replies == 0) { talloc_free(req); return status; } packet = req->replies[0].packet; io->out.reply_from = talloc_steal(mem_ctx, req->replies[0].dest->addr); if (packet->ancount != 1 || packet->answers[0].rr_type != NBT_QTYPE_NETBIOS || packet->answers[0].rr_class != NBT_QCLASS_IP) { talloc_free(req); return NT_STATUS_INVALID_NETWORK_RESPONSE; } io->out.rcode = packet->operation & NBT_RCODE; io->out.name = packet->answers[0].name; if (packet->answers[0].rdata.netbios.length < 6) { talloc_free(req); return NT_STATUS_INVALID_NETWORK_RESPONSE; } io->out.reply_addr = talloc_steal(mem_ctx, packet->answers[0].rdata.netbios.addresses[0].ipaddr); talloc_steal(mem_ctx, io->out.name.name); talloc_steal(mem_ctx, io->out.name.scope); talloc_free(req); return NT_STATUS_OK; } /* synchronous name release request */ _PUBLIC_ NTSTATUS nbt_name_release(struct nbt_name_socket *nbtsock, TALLOC_CTX *mem_ctx, struct nbt_name_release *io) { struct nbt_name_request *req = nbt_name_release_send(nbtsock, io); return nbt_name_release_recv(req, mem_ctx, io); }