2 Unix SMB/CIFS implementation.
3 NBT netbios library routines
4 Copyright (C) Andrew Tridgell 1994-1998
5 Copyright (C) Luke Kenneth Casson Leighton 1994-1998
6 Copyright (C) Jeremy Allison 1994-1998
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 int num_response_packets
= 0;
28 /***************************************************************************
29 Add an expected response record into the list
30 **************************************************************************/
32 static void add_response_record(struct subnet_record
*subrec
,
33 struct response_record
*rrec
)
35 struct response_record
*rrec2
;
37 num_response_packets
++; /* count of total number of packets still around */
39 DEBUG(4,("add_response_record: adding response record id:%hu to subnet %s. num_records:%d\n",
40 rrec
->response_id
, subrec
->subnet_name
, num_response_packets
));
42 if (!subrec
->responselist
) {
43 subrec
->responselist
= rrec
;
49 for (rrec2
= subrec
->responselist
; rrec2
->next
; rrec2
= rrec2
->next
)
57 /***************************************************************************
58 Remove an expected response record from the list
59 **************************************************************************/
61 void remove_response_record(struct subnet_record
*subrec
,
62 struct response_record
*rrec
)
65 rrec
->prev
->next
= rrec
->next
;
67 rrec
->next
->prev
= rrec
->prev
;
69 if (subrec
->responselist
== rrec
)
70 subrec
->responselist
= rrec
->next
;
73 if(rrec
->userdata
->free_fn
) {
74 (*rrec
->userdata
->free_fn
)(rrec
->userdata
);
76 ZERO_STRUCTP(rrec
->userdata
);
77 SAFE_FREE(rrec
->userdata
);
81 /* Ensure we can delete. */
82 rrec
->packet
->locked
= False
;
83 free_packet(rrec
->packet
);
88 num_response_packets
--; /* count of total number of packets still around */
91 /****************************************************************************
92 Create a response record for an outgoing packet.
93 **************************************************************************/
95 struct response_record
*make_response_record( struct subnet_record
*subrec
,
96 struct packet_struct
*p
,
97 response_function resp_fn
,
98 timeout_response_function timeout_fn
,
99 success_function success_fn
,
100 fail_function fail_fn
,
101 struct userdata_struct
*userdata
)
103 struct response_record
*rrec
;
104 struct nmb_packet
*nmb
= &p
->packet
.nmb
;
106 if (!(rrec
= SMB_MALLOC_P(struct response_record
))) {
107 DEBUG(0,("make_response_queue_record: malloc fail for response_record.\n"));
111 memset((char *)rrec
, '\0', sizeof(*rrec
));
113 rrec
->response_id
= nmb
->header
.name_trn_id
;
115 rrec
->resp_fn
= resp_fn
;
116 rrec
->timeout_fn
= timeout_fn
;
117 rrec
->success_fn
= success_fn
;
118 rrec
->fail_fn
= fail_fn
;
123 /* Intelligent userdata. */
124 if(userdata
->copy_fn
) {
125 if((rrec
->userdata
= (*userdata
->copy_fn
)(userdata
)) == NULL
) {
126 DEBUG(0,("make_response_queue_record: copy fail for userdata.\n"));
132 /* Primitive userdata, do a memcpy. */
133 if((rrec
->userdata
= (struct userdata_struct
*)
134 SMB_MALLOC(sizeof(struct userdata_struct
)+userdata
->userdata_len
)) == NULL
) {
135 DEBUG(0,("make_response_queue_record: malloc fail for userdata.\n"));
140 rrec
->userdata
->copy_fn
= userdata
->copy_fn
;
141 rrec
->userdata
->free_fn
= userdata
->free_fn
;
142 rrec
->userdata
->userdata_len
= userdata
->userdata_len
;
143 memcpy(rrec
->userdata
->data
, userdata
->data
, userdata
->userdata_len
);
146 rrec
->userdata
= NULL
;
151 if(!nmb
->header
.nm_flags
.bcast
)
152 rrec
->repeat_interval
= 5; /* 5 seconds for unicast packets. */
154 rrec
->repeat_interval
= 1; /* XXXX should be in ms */
155 rrec
->repeat_count
= 3; /* 3 retries */
156 rrec
->repeat_time
= time(NULL
) + rrec
->repeat_interval
; /* initial retry time */
158 /* This packet is not being processed. */
159 rrec
->in_expiration_processing
= False
;
161 /* Lock the packet so we won't lose it while it's on the list. */
164 add_response_record(subrec
, rrec
);
169 /****************************************************************************
170 Find a response in a subnet's name query response list.
171 **************************************************************************/
173 static struct response_record
*find_response_record_on_subnet(
174 struct subnet_record
*subrec
, uint16 id
)
176 struct response_record
*rrec
= NULL
;
178 for (rrec
= subrec
->responselist
; rrec
; rrec
= rrec
->next
) {
179 if (rrec
->response_id
== id
) {
180 DEBUG(4, ("find_response_record: found response record id = %hu on subnet %s\n",
181 id
, subrec
->subnet_name
));
188 /****************************************************************************
189 Find a response in any subnet's name query response list.
190 **************************************************************************/
192 struct response_record
*find_response_record(struct subnet_record
**ppsubrec
,
195 struct response_record
*rrec
= NULL
;
197 for ((*ppsubrec
) = FIRST_SUBNET
; (*ppsubrec
);
198 (*ppsubrec
) = NEXT_SUBNET_INCLUDING_UNICAST(*ppsubrec
)) {
199 if((rrec
= find_response_record_on_subnet(*ppsubrec
, id
)) != NULL
)
203 /* There should never be response records on the remote_broadcast subnet.
204 Sanity check to ensure this is so. */
205 if(remote_broadcast_subnet
->responselist
!= NULL
) {
206 DEBUG(0,("find_response_record: response record found on subnet %s. This should \
207 never happen !\n", remote_broadcast_subnet
->subnet_name
));
210 /* Now check the WINS server subnet if it exists. */
211 if(wins_server_subnet
!= NULL
) {
212 *ppsubrec
= wins_server_subnet
;
213 if((rrec
= find_response_record_on_subnet(*ppsubrec
, id
))!= NULL
)
217 DEBUG(0,("find_response_record: response packet id %hu received with no \
218 matching record.\n", id
));
225 /****************************************************************************
226 Check if a refresh is queued for a particular name on a particular subnet.
227 **************************************************************************/
229 BOOL
is_refresh_already_queued(struct subnet_record
*subrec
, struct name_record
*namerec
)
231 struct response_record
*rrec
= NULL
;
233 for (rrec
= subrec
->responselist
; rrec
; rrec
= rrec
->next
) {
234 struct packet_struct
*p
= rrec
->packet
;
235 struct nmb_packet
*nmb
= &p
->packet
.nmb
;
237 if((nmb
->header
.opcode
== NMB_NAME_REFRESH_OPCODE_8
) ||
238 (nmb
->header
.opcode
== NMB_NAME_REFRESH_OPCODE_9
)) {
239 /* Yes it's a queued refresh - check if the name is correct. */
240 if(nmb_name_equal(&nmb
->question
.question_name
, &namerec
->name
))