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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.
101 lines
3.1 KiB
C
101 lines
3.1 KiB
C
/*
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Unix SMB/CIFS implementation.
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answer name queries
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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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answer a name query
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*/
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void nbtd_request_query(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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/* see if its a node status query */
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if (packet->qdcount == 1 &&
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packet->questions[0].question_type == NBT_QTYPE_STATUS) {
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nbtd_query_status(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,
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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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/* 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, 0);
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if (iname == NULL) {
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/* don't send negative replies to broadcast queries */
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if (packet->operation & NBT_FLAG_BROADCAST) {
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return;
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}
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if (packet->operation & NBT_FLAG_RECURSION_DESIRED) {
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nbtd_winsserver_request(nbtsock, packet, src);
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return;
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}
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/* otherwise send a negative reply */
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nbtd_negative_name_query_reply(nbtsock, packet, src);
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return;
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}
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/*
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* normally we should forward all queries with the
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* recursion desired flag to the wins server, but this
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* breaks are winsclient code, when doing mhomed registrations
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*/
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if (!(packet->operation & NBT_FLAG_BROADCAST) &&
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(packet->operation & NBT_FLAG_RECURSION_DESIRED) &&
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(iname->nb_flags & NBT_NM_GROUP) &&
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lp_wins_support()) {
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nbtd_winsserver_request(nbtsock, packet, src);
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return;
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}
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/* if the name is not yet active and its a broadcast query then
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ignore it for now */
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if (!(iname->nb_flags & NBT_NM_ACTIVE) &&
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(packet->operation & NBT_FLAG_BROADCAST)) {
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DEBUG(7,("Query for %s from %s - name not active yet on %s\n",
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nbt_name_string(packet, name), src->addr, iface->ip_address));
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return;
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}
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nbtd_name_query_reply(nbtsock, packet, src,
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&iname->name, iname->ttl, iname->nb_flags,
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nbtd_address_list(iface, packet));
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}
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