release/src/router/pppd/pppd/plugins/minconn.c

   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
  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
  61 void plugin_init(void)
  62 {
  63         info("plugin_init");
  64         add_options(my_options);
  65         idle_time_hook = my_get_idle;
  66 }