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