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Diffstat (limited to '')
-rw-r--r-- | source4/nbt_server/query.c | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/source4/nbt_server/query.c b/source4/nbt_server/query.c new file mode 100644 index 0000000..7e1a760 --- /dev/null +++ b/source4/nbt_server/query.c @@ -0,0 +1,102 @@ +/* + Unix SMB/CIFS implementation. + + answer name queries + + 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 3 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, see <http://www.gnu.org/licenses/>. +*/ + +#include "includes.h" +#include "../lib/util/dlinklist.h" +#include "system/network.h" +#include "nbt_server/nbt_server.h" +#include "nbt_server/wins/winsserver.h" +#include "samba/service_task.h" +#include "librpc/gen_ndr/ndr_nbt.h" +#include "lib/socket/socket.h" +#include "param/param.h" + +/* + answer a name query +*/ +void nbtd_request_query(struct nbt_name_socket *nbtsock, + struct nbt_name_packet *packet, + struct socket_address *src) +{ + struct nbtd_iface_name *iname; + struct nbt_name *name; + struct nbtd_interface *iface = talloc_get_type(nbtsock->incoming.private_data, + struct nbtd_interface); + + /* see if its a node status query */ + if (packet->qdcount == 1 && + packet->questions[0].question_type == NBT_QTYPE_STATUS) { + nbtd_query_status(nbtsock, packet, src); + return; + } + + NBTD_ASSERT_PACKET(packet, src, packet->qdcount == 1); + NBTD_ASSERT_PACKET(packet, src, + packet->questions[0].question_type == NBT_QTYPE_NETBIOS); + NBTD_ASSERT_PACKET(packet, src, + packet->questions[0].question_class == NBT_QCLASS_IP); + + /* see if we have the requested name on this interface */ + name = &packet->questions[0].name; + + iname = nbtd_find_iname(iface, name, 0); + if (iname == NULL) { + /* don't send negative replies to broadcast queries */ + if (packet->operation & NBT_FLAG_BROADCAST) { + return; + } + + if (packet->operation & NBT_FLAG_RECURSION_DESIRED) { + nbtd_winsserver_request(nbtsock, packet, src); + return; + } + + /* otherwise send a negative reply */ + nbtd_negative_name_query_reply(nbtsock, packet, src); + return; + } + + /* + * normally we should forward all queries with the + * recursion desired flag to the wins server, but this + * breaks are winsclient code, when doing mhomed registrations + */ + if (!(packet->operation & NBT_FLAG_BROADCAST) && + (packet->operation & NBT_FLAG_RECURSION_DESIRED) && + (iname->nb_flags & NBT_NM_GROUP) && + lpcfg_we_are_a_wins_server(iface->nbtsrv->task->lp_ctx)) { + nbtd_winsserver_request(nbtsock, packet, src); + return; + } + + /* if the name is not yet active and its a broadcast query then + ignore it for now */ + if (!(iname->nb_flags & NBT_NM_ACTIVE) && + (packet->operation & NBT_FLAG_BROADCAST)) { + DEBUG(7,("Query for %s from %s - name not active yet on %s\n", + nbt_name_string(packet, name), src->addr, iface->ip_address)); + return; + } + + nbtd_name_query_reply(nbtsock, packet, src, + &iname->name, iname->ttl, iname->nb_flags, + nbtd_address_list(iface, packet)); +} |