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/*
Unix SMB/CIFS implementation.
defend our names against name registration 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 "dlinklist.h"
#include "system/network.h"
#include "nbt_server/nbt_server.h"
/*
defend our registered names against registration or name refresh
requests
*/
void nbtd_request_defense(struct nbt_name_socket *nbtsock,
struct nbt_name_packet *packet,
const char *src_address, int src_port)
{
struct nbtd_iface_name *iname;
struct nbt_name *name;
struct nbtd_interface *iface = talloc_get_type(nbtsock->incoming.private,
struct nbtd_interface);
NBTD_ASSERT_PACKET(packet, src_address, packet->qdcount == 1);
NBTD_ASSERT_PACKET(packet, src_address, packet->arcount == 1);
NBTD_ASSERT_PACKET(packet, src_address,
packet->questions[0].question_type == NBT_QTYPE_NETBIOS);
NBTD_ASSERT_PACKET(packet, src_address,
packet->questions[0].question_class == NBT_QCLASS_IP);
NBTD_ASSERT_PACKET(packet, src_address,
packet->additional[0].rr_type == NBT_QTYPE_NETBIOS);
NBTD_ASSERT_PACKET(packet, src_address,
packet->additional[0].rr_class == NBT_QCLASS_IP);
NBTD_ASSERT_PACKET(packet, src_address,
packet->additional[0].rdata.netbios.length == 6);
/* see if we have the requested name on this interface */
name = &packet->questions[0].name;
iname = nbtd_find_iname(iface, name, NBT_NM_ACTIVE);
if (iname != NULL && !(iname->nb_flags & NBT_NM_GROUP)) {
DEBUG(2,("Defending name %s on %s against %s\n",
nbt_name_string(packet, name),
iface->bcast_address, src_address));
nbtd_negative_name_registration_reply(nbtsock, packet,
src_address, src_port);
} else {
nbtd_winsserver_request(nbtsock, packet, src_address, src_port);
}
}
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