1 /*
2 * services/outbound_list.c - keep list of outbound serviced queries.
3 *
4 * Copyright (c) 2007, NLnet Labs. All rights reserved.
5 *
6 * This software is open source.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * Redistributions of source code must retain the above copyright notice,
13 * this list of conditions and the following disclaimer.
14 *
15 * Redistributions in binary form must reproduce the above copyright notice,
16 * this list of conditions and the following disclaimer in the documentation
17 * and/or other materials provided with the distribution.
18 *
19 * Neither the name of the NLNET LABS nor the names of its contributors may
20 * be used to endorse or promote products derived from this software without
21 * specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
24 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
25 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
26 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
27 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
29 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
30 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 */
35
36 /**
37 * \file
38 *
39 * This file contains functions to help a module keep track of the
40 * queries it has outstanding to authoritative servers.
41 */
42 #include "config.h"
43 #include <sys/time.h>
44 #include "services/outbound_list.h"
45 #include "services/outside_network.h"
46
47 void
outbound_list_init(struct outbound_list * list)48 outbound_list_init(struct outbound_list* list)
49 {
50 list->first = NULL;
51 }
52
53 void
outbound_list_clear(struct outbound_list * list)54 outbound_list_clear(struct outbound_list* list)
55 {
56 struct outbound_entry *p, *np;
57 p = list->first;
58 while(p) {
59 np = p->next;
60 outnet_serviced_query_stop(p->qsent, p);
61 /* in region, no free needed */
62 p = np;
63 }
64 outbound_list_init(list);
65 }
66
67 void
outbound_list_insert(struct outbound_list * list,struct outbound_entry * e)68 outbound_list_insert(struct outbound_list* list, struct outbound_entry* e)
69 {
70 if(list->first)
71 list->first->prev = e;
72 e->next = list->first;
73 e->prev = NULL;
74 list->first = e;
75 }
76
77 void
outbound_list_remove(struct outbound_list * list,struct outbound_entry * e)78 outbound_list_remove(struct outbound_list* list, struct outbound_entry* e)
79 {
80 if(!e)
81 return;
82 outnet_serviced_query_stop(e->qsent, e);
83 if(e->next)
84 e->next->prev = e->prev;
85 if(e->prev)
86 e->prev->next = e->next;
87 else list->first = e->next;
88 /* in region, no free needed */
89 }
90