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 pstring myname;
33 extern struct in_addr ipzero;
35 int num_response_packets = 0;
37 /***************************************************************************
38 Add an expected response record into the list
39 **************************************************************************/
41 void add_response_record(struct subnet_record *subrec,
42 struct response_record *rrec)
44 struct response_record *rrec2;
46 num_response_packets++; /* count of total number of packets still around */
48 DEBUG(4,("add_response_record: adding response record id:%hu to subnet %s. num_records:%d\n",
49 rrec->response_id, subrec->subnet_name, num_response_packets));
51 if (!subrec->responselist)
53 subrec->responselist = rrec;
59 for (rrec2 = subrec->responselist; rrec2->next; rrec2 = rrec2->next)
67 /***************************************************************************
68 Remove an expected response record from the list
69 **************************************************************************/
71 void remove_response_record(struct subnet_record *subrec,
72 struct response_record *rrec)
75 rrec->prev->next = rrec->next;
77 rrec->next->prev = rrec->prev;
79 if (subrec->responselist == rrec)
80 subrec->responselist = rrec->next;
84 if(rrec->userdata->free_fn)
85 (*rrec->userdata->free_fn)(rrec->userdata);
87 free((char *)rrec->userdata);
90 /* Ensure we can delete. */
91 rrec->packet->locked = False;
92 free_packet(rrec->packet);
96 num_response_packets--; /* count of total number of packets still around */
99 /****************************************************************************
100 Create a response record for an outgoing packet.
101 **************************************************************************/
103 struct response_record *make_response_record( struct subnet_record *subrec,
104 struct packet_struct *p,
105 response_function resp_fn,
106 timeout_response_function timeout_fn,
107 success_function success_fn,
108 fail_function fail_fn,
109 struct userdata_struct *userdata)
111 struct response_record *rrec;
112 struct nmb_packet *nmb = &p->packet.nmb;
114 if (!(rrec = (struct response_record *)malloc(sizeof(*rrec))))
116 DEBUG(0,("make_response_queue_record: malloc fail for response_record.\n"));
120 bzero((char *)rrec, sizeof(*rrec));
122 rrec->response_id = nmb->header.name_trn_id;
124 rrec->resp_fn = resp_fn;
125 rrec->timeout_fn = timeout_fn;
126 rrec->success_fn = success_fn;
127 rrec->fail_fn = fail_fn;
133 /* Intelligent userdata. */
134 if(userdata->copy_fn)
136 if((rrec->userdata = (*userdata->copy_fn)(userdata)) == NULL)
138 DEBUG(0,("make_response_queue_record: copy fail for userdata.\n"));
145 /* Primitive userdata, do a memcpy. */
146 if((rrec->userdata = (struct userdata_struct *)
147 malloc(sizeof(struct userdata_struct)+userdata->userdata_len)) == NULL)
149 DEBUG(0,("make_response_queue_record: malloc fail for userdata.\n"));
153 rrec->userdata->copy_fn = userdata->copy_fn;
154 rrec->userdata->free_fn = userdata->free_fn;
155 rrec->userdata->userdata_len = userdata->userdata_len;
156 memcpy(rrec->userdata->data, userdata->data, userdata->userdata_len);
160 rrec->userdata = NULL;
164 if(!nmb->header.nm_flags.bcast)
165 rrec->repeat_interval = 5; /* 5 seconds for unicast packets. */
167 rrec->repeat_interval = 1; /* XXXX should be in ms */
168 rrec->repeat_count = 3; /* 3 retries */
169 rrec->repeat_time = time(NULL) + rrec->repeat_interval; /* initial retry time */
171 /* Lock the packet so we won't lose it while it's on the list. */
174 add_response_record(subrec, rrec);
179 /****************************************************************************
180 Find a response in a subnet's name query response list.
181 **************************************************************************/
183 static struct response_record *find_response_record_on_subnet(
184 struct subnet_record *subrec, uint16 id)
186 struct response_record *rrec = NULL;
188 for (rrec = subrec->responselist; rrec; rrec = rrec->next)
190 if (rrec->response_id == id)
192 DEBUG(4, ("find_response_record: found response record id = %hu on subnet %s\n",
193 id, subrec->subnet_name));
200 /****************************************************************************
201 Find a response in any subnet's name query response list.
202 **************************************************************************/
204 struct response_record *find_response_record(struct subnet_record **ppsubrec,
207 struct response_record *rrec = NULL;
209 for ((*ppsubrec) = FIRST_SUBNET; (*ppsubrec);
210 (*ppsubrec) = NEXT_SUBNET_INCLUDING_UNICAST(*ppsubrec))
212 if((rrec = find_response_record_on_subnet(*ppsubrec, id)) != NULL)
216 /* There should never be response records on the remote_broadcast subnet.
217 Sanity check to ensure this is so. */
218 if(remote_broadcast_subnet->responselist != NULL)
220 DEBUG(0,("find_response_record: response record found on subnet %s. This should \
221 never happen !\n", remote_broadcast_subnet->subnet_name));
224 /* Now check the WINS server subnet if it exists. */
225 if(wins_server_subnet != NULL)
227 *ppsubrec = wins_server_subnet;
228 if((rrec = find_response_record_on_subnet(*ppsubrec, id))!= NULL)
232 DEBUG(0,("find_response_record: response packet id %hu received with no \
233 matching record.\n", id));
240 /****************************************************************************
241 Check if a refresh is queued for a particular name on a particular subnet.
242 **************************************************************************/
244 BOOL is_refresh_already_queued(struct subnet_record *subrec, struct name_record *namerec)
246 struct response_record *rrec = NULL;
248 for (rrec = subrec->responselist; rrec; rrec = rrec->next)
250 struct packet_struct *p = rrec->packet;
251 struct nmb_packet *nmb = &p->packet.nmb;
253 if((nmb->header.opcode == NMB_NAME_REFRESH_OPCODE_8) ||
254 (nmb->header.opcode == NMB_NAME_REFRESH_OPCODE_9))
256 /* Yes it's a queued refresh - check if the name is correct. */
257 if(nmb_name_equal(&nmb->question.question_name, &namerec->name))