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/*
Unix SMB/CIFS implementation.
make nbt name query requests
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
#include "libcli/nbt/libnbt.h"
#include "system/network.h"
/*
send a nbt name query
*/
struct nbt_name_request *nbt_name_query_send(struct nbt_name_socket *nbtsock,
struct nbt_name_query *io)
{
struct nbt_name_request *req;
struct nbt_name_packet *packet;
packet = talloc_zero(nbtsock, struct nbt_name_packet);
if (packet == NULL) return NULL;
packet->qdcount = 1;
packet->operation = NBT_OPCODE_QUERY;
if (io->in.broadcast) {
packet->operation |= NBT_FLAG_BROADCAST;
}
if (io->in.wins_lookup) {
packet->operation |= NBT_FLAG_RECURSION_DESIRED;
}
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;
req = nbt_name_request_send(nbtsock, io->in.dest_addr, NBT_NAME_SERVICE_PORT, packet,
timeval_current_ofs(io->in.timeout, 0), False);
if (req == NULL) goto failed;
talloc_steal(req, packet);
return req;
failed:
talloc_free(packet);
return NULL;
}
/*
wait for a name query replu
*/
NTSTATUS nbt_name_query_recv(struct nbt_name_request *req,
TALLOC_CTX *mem_ctx, struct nbt_name_query *io)
{
NTSTATUS status;
struct nbt_name_packet *packet;
const char *addr;
struct in_addr in;
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].reply_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.name = packet->answers[0].name;
in.s_addr = htonl(packet->answers[0].rdata.netbios.ipaddr);
addr = inet_ntoa(in);
if (addr == NULL) {
talloc_free(req);
return NT_STATUS_NO_MEMORY;
}
io->out.reply_addr = talloc_strdup(mem_ctx, addr);
talloc_steal(mem_ctx, io->out.name.name);
talloc_steal(mem_ctx, io->out.name.scope);
talloc_free(req);
return NT_STATUS_OK;
}
/*
wait for a name query replu
*/
NTSTATUS nbt_name_query(struct nbt_name_socket *nbtsock,
TALLOC_CTX *mem_ctx, struct nbt_name_query *io)
{
struct nbt_name_request *req = nbt_name_query_send(nbtsock, io);
return nbt_name_query_recv(req, mem_ctx, io);
}
/*
send a nbt name status
*/
struct nbt_name_request *nbt_name_status_send(struct nbt_name_socket *nbtsock,
struct nbt_name_status *io)
{
struct nbt_name_request *req;
struct nbt_name_packet *packet;
packet = talloc_zero(nbtsock, struct nbt_name_packet);
if (packet == NULL) return NULL;
packet->qdcount = 1;
packet->operation = NBT_OPCODE_QUERY;
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_STATUS;
packet->questions[0].question_class = NBT_QCLASS_IP;
req = nbt_name_request_send(nbtsock, io->in.dest_addr, NBT_NAME_SERVICE_PORT, packet,
timeval_current_ofs(io->in.timeout, 0), False);
if (req == NULL) goto failed;
talloc_steal(req, packet);
return req;
failed:
talloc_free(packet);
return NULL;
}
/*
wait for a name status replu
*/
NTSTATUS nbt_name_status_recv(struct nbt_name_request *req,
TALLOC_CTX *mem_ctx, struct nbt_name_status *io)
{
NTSTATUS status;
struct nbt_name_packet *packet;
int i;
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].reply_addr);
if (packet->ancount != 1 ||
packet->answers[0].rr_type != NBT_QTYPE_STATUS ||
packet->answers[0].rr_class != NBT_QCLASS_IP) {
talloc_free(req);
return NT_STATUS_INVALID_NETWORK_RESPONSE;
}
io->out.name = packet->answers[0].name;
talloc_steal(mem_ctx, io->out.name.name);
talloc_steal(mem_ctx, io->out.name.scope);
io->out.status = packet->answers[0].rdata.status;
talloc_steal(mem_ctx, io->out.status.names);
for (i=0;i<io->out.status.num_names;i++) {
talloc_steal(io->out.status.names, io->out.status.names[i].name);
}
talloc_free(req);
return NT_STATUS_OK;
}
/*
wait for a name status replu
*/
NTSTATUS nbt_name_status(struct nbt_name_socket *nbtsock,
TALLOC_CTX *mem_ctx, struct nbt_name_status *io)
{
struct nbt_name_request *req = nbt_name_status_send(nbtsock, io);
return nbt_name_status_recv(req, mem_ctx, io);
}
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