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ee8f481d94
This fixes the following bug: While we reply with a WACK response to a client. Instead of waiting for the final reply some windows client just resends the request using the same name_trn_id in the nbt_name_packet. We handled this as a new request and send a WACK response (and the challenges) again. Then the first request gets its final success response, but the when we try to send the success for the "second" request we notice that the record was changed in between and we return an error. Windows 2003 (and I assume all other versions as well) detect the packet is just a resent of a currently pending request and ignores it. So we now keep a list of all pending WINS name register requests which result in a WACK response. On each incoming name register request we search through the list to find duplicate requests and ignore them. In theory we should do that for all requests, but name register requests are the only requests we response async and only if we have to go via the WACK code path. metze (from samba4wins tree 382e7d384b70d03e9f81c7bb353afaed288d80f0)
95 lines
2.4 KiB
C
95 lines
2.4 KiB
C
/*
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Unix SMB/CIFS implementation.
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NBT server structures
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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 "../libcli/nbt/libnbt.h"
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#include "libcli/wrepl/winsrepl.h"
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#include "libcli/dgram/libdgram.h"
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#include "librpc/gen_ndr/irpc.h"
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#include "lib/messaging/irpc.h"
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/*
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a list of our registered names on each interface
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*/
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struct nbtd_iface_name {
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struct nbtd_iface_name *next, *prev;
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struct nbtd_interface *iface;
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struct nbt_name name;
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uint16_t nb_flags;
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struct timeval registration_time;
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uint32_t ttl;
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/* if registered with a wins server, then this lists the server being
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used */
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const char *wins_server;
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};
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struct nbtd_wins_wack_state;
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/* a list of network interfaces we are listening on */
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struct nbtd_interface {
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struct nbtd_interface *next, *prev;
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struct nbtd_server *nbtsrv;
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const char *ip_address;
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const char *bcast_address;
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const char *netmask;
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struct nbt_name_socket *nbtsock;
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struct nbt_dgram_socket *dgmsock;
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struct nbtd_iface_name *names;
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struct nbtd_wins_wack_state *wack_queue;
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};
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/*
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top level context structure for the nbt server
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*/
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struct nbtd_server {
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struct task_server *task;
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/* the list of local network interfaces */
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struct nbtd_interface *interfaces;
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/* broadcast interface used for receiving packets only */
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struct nbtd_interface *bcast_interface;
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/* wins client interface - used for registering and refreshing
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our names with a WINS server */
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struct nbtd_interface *wins_interface;
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struct wins_server *winssrv;
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struct nbtd_statistics stats;
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struct ldb_context *sam_ctx;
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};
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/* check a condition on an incoming packet */
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#define NBTD_ASSERT_PACKET(packet, src, test) do { \
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if (!(test)) { \
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nbtd_bad_packet(packet, src, #test); \
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return; \
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} \
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} while (0)
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struct interface;
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#include "nbt_server/nbt_server_proto.h"
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