diff options
Diffstat (limited to 'libcli/nbt/namerelease.c')
| -rw-r--r-- | libcli/nbt/namerelease.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/libcli/nbt/namerelease.c b/libcli/nbt/namerelease.c new file mode 100644 index 0000000..68c8252 --- /dev/null +++ b/libcli/nbt/namerelease.c @@ -0,0 +1,134 @@ +/* + 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, 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); +} |