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/*
Unix SMB/CIFS implementation.
send out a name refresh 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 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 "libcli/raw/libcliraw.h"
#include "libcli/composite/composite.h"
#include "system/network.h"
/*
send a nbt name refresh request
*/
struct nbt_name_request *nbt_name_refresh_send(struct nbt_name_socket *nbtsock,
struct nbt_name_refresh *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->arcount = 1;
packet->operation = NBT_OPCODE_REFRESH;
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 = io->in.ttl;
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);
req = nbt_name_request_send(nbtsock, io->in.dest_addr, lp_nbt_port(), packet,
timeval_current_ofs(io->in.timeout, 0), False);
if (req == NULL) goto failed;
talloc_free(packet);
return req;
failed:
talloc_free(packet);
return NULL;
}
/*
wait for a refresh reply
*/
NTSTATUS nbt_name_refresh_recv(struct nbt_name_request *req,
TALLOC_CTX *mem_ctx, struct nbt_name_refresh *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].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.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 refresh request
*/
NTSTATUS nbt_name_refresh(struct nbt_name_socket *nbtsock,
TALLOC_CTX *mem_ctx, struct nbt_name_refresh *io)
{
struct nbt_name_request *req = nbt_name_refresh_send(nbtsock, io);
return nbt_name_refresh_recv(req, mem_ctx, io);
}
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