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 3 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, see <http://www.gnu.org/licenses/>.
25 int num_response_packets = 0;
27 /***************************************************************************
28 Add an expected response record into the list
29 **************************************************************************/
31 static void add_response_record(struct subnet_record *subrec,
32 struct response_record *rrec)
34 struct response_record *rrec2;
36 num_response_packets++; /* count of total number of packets still around */
38 DEBUG(4,("add_response_record: adding response record id:%hu to subnet %s. num_records:%d\n",
39 rrec->response_id, subrec->subnet_name, num_response_packets));
41 if (!subrec->responselist) {
42 subrec->responselist = rrec;
48 for (rrec2 = subrec->responselist; rrec2->next; rrec2 = rrec2->next)
56 /***************************************************************************
57 Remove an expected response record from the list
58 **************************************************************************/
60 void remove_response_record(struct subnet_record *subrec,
61 struct response_record *rrec)
64 rrec->prev->next = rrec->next;
66 rrec->next->prev = rrec->prev;
68 if (subrec->responselist == rrec)
69 subrec->responselist = rrec->next;
72 if(rrec->userdata->free_fn) {
73 (*rrec->userdata->free_fn)(rrec->userdata);
75 ZERO_STRUCTP(rrec->userdata);
76 SAFE_FREE(rrec->userdata);
80 /* Ensure we can delete. */
81 rrec->packet->locked = False;
82 free_packet(rrec->packet);
87 num_response_packets--; /* count of total number of packets still around */
90 /****************************************************************************
91 Create a response record for an outgoing packet.
92 **************************************************************************/
94 struct response_record *make_response_record( struct subnet_record *subrec,
95 struct packet_struct *p,
96 response_function resp_fn,
97 timeout_response_function timeout_fn,
98 success_function success_fn,
99 fail_function fail_fn,
100 struct userdata_struct *userdata)
102 struct response_record *rrec;
103 struct nmb_packet *nmb = &p->packet.nmb;
105 if (!(rrec = SMB_MALLOC_P(struct response_record))) {
106 DEBUG(0,("make_response_queue_record: malloc fail for response_record.\n"));
110 memset((char *)rrec, '\0', sizeof(*rrec));
112 rrec->response_id = nmb->header.name_trn_id;
114 rrec->resp_fn = resp_fn;
115 rrec->timeout_fn = timeout_fn;
116 rrec->success_fn = success_fn;
117 rrec->fail_fn = fail_fn;
122 /* Intelligent userdata. */
123 if(userdata->copy_fn) {
124 if((rrec->userdata = (*userdata->copy_fn)(userdata)) == NULL) {
125 DEBUG(0,("make_response_queue_record: copy fail for userdata.\n"));
131 /* Primitive userdata, do a memcpy. */
132 if((rrec->userdata = (struct userdata_struct *)
133 SMB_MALLOC(sizeof(struct userdata_struct)+userdata->userdata_len)) == NULL) {
134 DEBUG(0,("make_response_queue_record: malloc fail for userdata.\n"));
139 rrec->userdata->copy_fn = userdata->copy_fn;
140 rrec->userdata->free_fn = userdata->free_fn;
141 rrec->userdata->userdata_len = userdata->userdata_len;
142 memcpy(rrec->userdata->data, userdata->data, userdata->userdata_len);
145 rrec->userdata = NULL;
150 if(!nmb->header.nm_flags.bcast)
151 rrec->repeat_interval = 5; /* 5 seconds for unicast packets. */
153 rrec->repeat_interval = 1; /* XXXX should be in ms */
154 rrec->repeat_count = 3; /* 3 retries */
155 rrec->repeat_time = time(NULL) + rrec->repeat_interval; /* initial retry time */
157 /* This packet is not being processed. */
158 rrec->in_expiration_processing = False;
160 /* Lock the packet so we won't lose it while it's on the list. */
163 add_response_record(subrec, rrec);
168 /****************************************************************************
169 Find a response in a subnet's name query response list.
170 **************************************************************************/
172 static struct response_record *find_response_record_on_subnet(
173 struct subnet_record *subrec, uint16 id)
175 struct response_record *rrec = NULL;
177 for (rrec = subrec->responselist; rrec; rrec = rrec->next) {
178 if (rrec->response_id == id) {
179 DEBUG(4, ("find_response_record: found response record id = %hu on subnet %s\n",
180 id, subrec->subnet_name));
187 /****************************************************************************
188 Find a response in any subnet's name query response list.
189 **************************************************************************/
191 struct response_record *find_response_record(struct subnet_record **ppsubrec,
194 struct response_record *rrec = NULL;
196 for ((*ppsubrec) = FIRST_SUBNET; (*ppsubrec);
197 (*ppsubrec) = NEXT_SUBNET_INCLUDING_UNICAST(*ppsubrec)) {
198 if((rrec = find_response_record_on_subnet(*ppsubrec, id)) != NULL)
202 /* There should never be response records on the remote_broadcast subnet.
203 Sanity check to ensure this is so. */
204 if(remote_broadcast_subnet->responselist != NULL) {
205 DEBUG(0,("find_response_record: response record found on subnet %s. This should \
206 never happen !\n", remote_broadcast_subnet->subnet_name));
209 /* Now check the WINS server subnet if it exists. */
210 if(wins_server_subnet != NULL) {
211 *ppsubrec = wins_server_subnet;
212 if((rrec = find_response_record_on_subnet(*ppsubrec, id))!= NULL)
216 DEBUG(3,("find_response_record: response packet id %hu received with no \
217 matching record.\n", id));
224 /****************************************************************************
225 Check if a refresh is queued for a particular name on a particular subnet.
226 **************************************************************************/
228 bool is_refresh_already_queued(struct subnet_record *subrec, struct name_record *namerec)
230 struct response_record *rrec = NULL;
232 for (rrec = subrec->responselist; rrec; rrec = rrec->next) {
233 struct packet_struct *p = rrec->packet;
234 struct nmb_packet *nmb = &p->packet.nmb;
236 if((nmb->header.opcode == NMB_NAME_REFRESH_OPCODE_8) ||
237 (nmb->header.opcode == NMB_NAME_REFRESH_OPCODE_9)) {
238 /* Yes it's a queued refresh - check if the name is correct. */
239 if(nmb_name_equal(&nmb->question.question_name, &namerec->name))