2 Unix SMB/Netbios implementation.
4 NBT netbios library routines
5 Copyright (C) Andrew Tridgell 1994-1998
6 Copyright (C) Luke Kenneth Casson Leighton 1994-1998
7 Copyright (C) Jeremy Allison 1994-1998
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 extern int DEBUGLEVEL;
32 extern struct in_addr ipzero;
34 int num_response_packets = 0;
36 /***************************************************************************
37 Add an expected response record into the list
38 **************************************************************************/
40 static void add_response_record(struct subnet_record *subrec,
41 struct response_record *rrec)
43 struct response_record *rrec2;
45 num_response_packets++; /* count of total number of packets still around */
47 DEBUG(4,("add_response_record: adding response record id:%hu to subnet %s. num_records:%d\n",
48 rrec->response_id, subrec->subnet_name, num_response_packets));
50 if (!subrec->responselist)
52 subrec->responselist = rrec;
58 for (rrec2 = subrec->responselist; rrec2->next; rrec2 = rrec2->next)
66 /***************************************************************************
67 Remove an expected response record from the list
68 **************************************************************************/
70 void remove_response_record(struct subnet_record *subrec,
71 struct response_record *rrec)
74 rrec->prev->next = rrec->next;
76 rrec->next->prev = rrec->prev;
78 if (subrec->responselist == rrec)
79 subrec->responselist = rrec->next;
83 if(rrec->userdata->free_fn) {
84 (*rrec->userdata->free_fn)(rrec->userdata);
86 ZERO_STRUCTP(rrec->userdata);
87 free((char *)rrec->userdata);
91 /* Ensure we can delete. */
92 rrec->packet->locked = False;
93 free_packet(rrec->packet);
98 num_response_packets--; /* count of total number of packets still around */
101 /****************************************************************************
102 Create a response record for an outgoing packet.
103 **************************************************************************/
105 struct response_record *make_response_record( struct subnet_record *subrec,
106 struct packet_struct *p,
107 response_function resp_fn,
108 timeout_response_function timeout_fn,
109 success_function success_fn,
110 fail_function fail_fn,
111 struct userdata_struct *userdata)
113 struct response_record *rrec;
114 struct nmb_packet *nmb = &p->packet.nmb;
116 if (!(rrec = (struct response_record *)malloc(sizeof(*rrec))))
118 DEBUG(0,("make_response_queue_record: malloc fail for response_record.\n"));
122 memset((char *)rrec, '\0', sizeof(*rrec));
124 rrec->response_id = nmb->header.name_trn_id;
126 rrec->resp_fn = resp_fn;
127 rrec->timeout_fn = timeout_fn;
128 rrec->success_fn = success_fn;
129 rrec->fail_fn = fail_fn;
135 /* Intelligent userdata. */
136 if(userdata->copy_fn)
138 if((rrec->userdata = (*userdata->copy_fn)(userdata)) == NULL)
140 DEBUG(0,("make_response_queue_record: copy fail for userdata.\n"));
148 /* Primitive userdata, do a memcpy. */
149 if((rrec->userdata = (struct userdata_struct *)
150 malloc(sizeof(struct userdata_struct)+userdata->userdata_len)) == NULL)
152 DEBUG(0,("make_response_queue_record: malloc fail for userdata.\n"));
157 rrec->userdata->copy_fn = userdata->copy_fn;
158 rrec->userdata->free_fn = userdata->free_fn;
159 rrec->userdata->userdata_len = userdata->userdata_len;
160 memcpy(rrec->userdata->data, userdata->data, userdata->userdata_len);
164 rrec->userdata = NULL;
168 if(!nmb->header.nm_flags.bcast)
169 rrec->repeat_interval = 5; /* 5 seconds for unicast packets. */
171 rrec->repeat_interval = 1; /* XXXX should be in ms */
172 rrec->repeat_count = 3; /* 3 retries */
173 rrec->repeat_time = time(NULL) + rrec->repeat_interval; /* initial retry time */
175 /* This packet is not being processed. */
176 rrec->in_expiration_processing = False;
178 /* Lock the packet so we won't lose it while it's on the list. */
181 add_response_record(subrec, rrec);
186 /****************************************************************************
187 Find a response in a subnet's name query response list.
188 **************************************************************************/
190 static struct response_record *find_response_record_on_subnet(
191 struct subnet_record *subrec, uint16 id)
193 struct response_record *rrec = NULL;
195 for (rrec = subrec->responselist; rrec; rrec = rrec->next)
197 if (rrec->response_id == id)
199 DEBUG(4, ("find_response_record: found response record id = %hu on subnet %s\n",
200 id, subrec->subnet_name));
207 /****************************************************************************
208 Find a response in any subnet's name query response list.
209 **************************************************************************/
211 struct response_record *find_response_record(struct subnet_record **ppsubrec,
214 struct response_record *rrec = NULL;
216 for ((*ppsubrec) = FIRST_SUBNET; (*ppsubrec);
217 (*ppsubrec) = NEXT_SUBNET_INCLUDING_UNICAST(*ppsubrec))
219 if((rrec = find_response_record_on_subnet(*ppsubrec, id)) != NULL)
223 /* There should never be response records on the remote_broadcast subnet.
224 Sanity check to ensure this is so. */
225 if(remote_broadcast_subnet->responselist != NULL)
227 DEBUG(0,("find_response_record: response record found on subnet %s. This should \
228 never happen !\n", remote_broadcast_subnet->subnet_name));
231 /* Now check the WINS server subnet if it exists. */
232 if(wins_server_subnet != NULL)
234 *ppsubrec = wins_server_subnet;
235 if((rrec = find_response_record_on_subnet(*ppsubrec, id))!= NULL)
239 DEBUG(0,("find_response_record: response packet id %hu received with no \
240 matching record.\n", id));
247 /****************************************************************************
248 Check if a refresh is queued for a particular name on a particular subnet.
249 **************************************************************************/
251 BOOL is_refresh_already_queued(struct subnet_record *subrec, struct name_record *namerec)
253 struct response_record *rrec = NULL;
255 for (rrec = subrec->responselist; rrec; rrec = rrec->next)
257 struct packet_struct *p = rrec->packet;
258 struct nmb_packet *nmb = &p->packet.nmb;
260 if((nmb->header.opcode == NMB_NAME_REFRESH_OPCODE_8) ||
261 (nmb->header.opcode == NMB_NAME_REFRESH_OPCODE_9))
263 /* Yes it's a queued refresh - check if the name is correct. */
264 if(nmb_name_equal(&nmb->question.question_name, &namerec->name))