1 /*
2  * minconn.c - pppd plugin to implement a `minconnect' option.
3  *
4  * Copyright (c) 1999 Paul Mackerras. All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  *
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  *
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in
15  *    the documentation and/or other materials provided with the
16  *    distribution.
17  *
18  * 3. The name(s) of the authors of this software must not be used to
19  *    endorse or promote products derived from this software without
20  *    prior written permission.
21  *
22  * 4. Redistributions of any form whatsoever must retain the following
23  *    acknowledgment:
24  *    "This product includes software developed by Paul Mackerras
25  *     <paulus@samba.org>".
26  *
27  * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
28  * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
29  * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
30  * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
31  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
32  * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
33  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
34  */
35 #include <stddef.h>
36 #include <time.h>
37 #include "pppd.h"
38 
39 char pppd_version[] = VERSION;
40 
41 static int minconnect = 0;
42 
43 static option_t my_options[] = {
44 	{ "minconnect", o_int, &minconnect,
45 	  "Set minimum connect time before idle timeout applies" },
46 	{ NULL }
47 };
48 
my_get_idle(struct ppp_idle * idle)49 static int my_get_idle(struct ppp_idle *idle)
50 {
51 	time_t t;
52 
53 	if (idle == NULL)
54 		return minconnect? minconnect: idle_time_limit;
55 	t = idle->xmit_idle;
56 	if (idle->recv_idle < t)
57 		t = idle->recv_idle;
58 	return idle_time_limit - t;
59 }
60 
plugin_init(void)61 void plugin_init(void)
62 {
63 	info("plugin_init");
64 	add_options(my_options);
65 	idle_time_hook = my_get_idle;
66 }
67