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https://github.com/samba-team/samba.git
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fcf38a38ac
There are still a few tidyups of old FSF addresses to come (in both s3 and s4). More commits soon.
80 lines
2.7 KiB
C
80 lines
2.7 KiB
C
/*
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Unix SMB/CIFS implementation.
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defend our names against name registration requests
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Copyright (C) Andrew Tridgell 2005
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "lib/util/dlinklist.h"
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#include "system/network.h"
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#include "nbt_server/nbt_server.h"
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#include "nbt_server/wins/winsserver.h"
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#include "librpc/gen_ndr/ndr_nbt.h"
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#include "lib/socket/socket.h"
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/*
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defend our registered names against registration or name refresh
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requests
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*/
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void nbtd_request_defense(struct nbt_name_socket *nbtsock,
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struct nbt_name_packet *packet,
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struct socket_address *src)
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{
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struct nbtd_iface_name *iname;
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struct nbt_name *name;
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struct nbtd_interface *iface = talloc_get_type(nbtsock->incoming.private,
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struct nbtd_interface);
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/*
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* if the packet comes from one of our interfaces
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* it must be our winsclient trying to reach the winsserver
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*/
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if (nbtd_self_packet(nbtsock, packet, src)) {
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nbtd_winsserver_request(nbtsock, packet, src);
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return;
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}
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NBTD_ASSERT_PACKET(packet, src, packet->qdcount == 1);
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NBTD_ASSERT_PACKET(packet, src, packet->arcount == 1);
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NBTD_ASSERT_PACKET(packet, src,
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packet->questions[0].question_type == NBT_QTYPE_NETBIOS);
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NBTD_ASSERT_PACKET(packet, src,
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packet->questions[0].question_class == NBT_QCLASS_IP);
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NBTD_ASSERT_PACKET(packet, src,
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packet->additional[0].rr_type == NBT_QTYPE_NETBIOS);
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NBTD_ASSERT_PACKET(packet, src,
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packet->additional[0].rr_class == NBT_QCLASS_IP);
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NBTD_ASSERT_PACKET(packet, src,
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packet->additional[0].rdata.netbios.length == 6);
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/* see if we have the requested name on this interface */
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name = &packet->questions[0].name;
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iname = nbtd_find_iname(iface, name, NBT_NM_ACTIVE);
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if (iname != NULL &&
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!(name->type == NBT_NAME_LOGON || iname->nb_flags & NBT_NM_GROUP)) {
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DEBUG(2,("Defending name %s on %s against %s\n",
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nbt_name_string(packet, name),
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iface->bcast_address, src->addr));
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nbtd_name_registration_reply(nbtsock, packet, src, NBT_RCODE_ACT);
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} else {
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nbtd_winsserver_request(nbtsock, packet, src);
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}
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}
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