autothrottle.c

   1 #include <string.h>
   2 #include "l2tpns.h"
   3 #include "plugin.h"
   4
   5 /* set up throttling based on RADIUS reply */
   6
   7 /*
   8  * lcp:interface-config#1=service-policy input N
   9  * lcp:interface-config#2=service-policy output N
  10  *
  11  * throttle=N
  12  * throttle=yes (use throttle_rate from config)
  13  * throttle=no
  14  */
  15
  16 char const *cvs_id = "$Id: autothrottle.c,v 1.14 2005-05-13 05:28:16 bodea Exp $";
  17
  18 int plugin_api_version = PLUGIN_API_VERSION;
  19 struct pluginfuncs *p;
  20
  21 #define THROTTLE_KEY "lcp:interface-config"
  22
  23 int plugin_radius_response(struct param_radius_response *data)
  24 {
  25         if (!strncmp(data->key, THROTTLE_KEY, sizeof(THROTTLE_KEY) - 1))
  26         {
  27                 char *sp = strchr(data->value, ' ');
  28                 char type;
  29                 int rate;
  30
  31                 if (!sp || sp - data->value < 4 ||
  32                     strncmp("service-policy", data->value, sp - data->value))
  33                         return PLUGIN_RET_OK;
  34
  35                 while (*sp == ' ') sp++;
  36                 data->value = sp;
  37
  38                 if (!(sp = strchr(data->value, ' ')) ||
  39                     (strncmp("input", data->value, sp - data->value) &&
  40                     strncmp("output", data->value, sp - data->value)))
  41                 {
  42                         p->log(3, p->get_id_by_session(data->s), data->s->tunnel,
  43                                 "         Not throttling user (invalid type %.*s)\n",
  44                                 sp - data->value, data->value);
  45
  46                         return PLUGIN_RET_OK;
  47                 }
  48
  49                 type = *data->value;
  50
  51                 while (*sp == ' ') sp++;
  52                 data->value = sp;
  53
  54                 if ((rate = strtol(data->value, &sp, 10)) < 0 || *sp)
  55                 {
  56                         p->log(3, p->get_id_by_session(data->s), data->s->tunnel,
  57                                 "         Not throttling user (invalid rate %s)\n",
  58                                 data->value);
  59
  60                         return PLUGIN_RET_OK;
  61                 }
  62
  63                 if (type == 'i')
  64                 {
  65                         data->s->throttle_in = rate;
  66                         p->log(3, p->get_id_by_session(data->s), data->s->tunnel,
  67                                 "         Throttling user input to %dkb/s\n",
  68                                 rate);
  69                 }
  70                 else
  71                 {
  72                         data->s->throttle_out = rate;
  73                         p->log(3, p->get_id_by_session(data->s), data->s->tunnel,
  74                                 "         Throttling user output to %dkb/s\n",
  75                                 rate);
  76                 }
  77         }
  78
  79         if (!strcmp(data->key, "throttle"))
  80         {
  81                 char *e;
  82                 int rate;
  83
  84                 if ((rate = strtol(data->value, &e, 10)) < 0 || *e)
  85                 {
  86                         rate = -1;
  87                         if (!strcmp(data->value, "yes"))
  88                         {
  89                                 unsigned long *ts = p->getconfig("throttle_speed", UNSIGNED_LONG);
  90                                 if (ts)
  91                                         rate = *ts;
  92                         }
  93                         else if (!strcmp(data->value, "no"))
  94                                 rate = 0;
  95                 }
  96
  97                 if (rate < 0)
  98                         return PLUGIN_RET_OK;
  99
 100                 if (rate)
 101                         p->log(3, p->get_id_by_session(data->s), data->s->tunnel,
 102                                 "         Throttling user to %dkb/s\n", rate);
 103                 else
 104                         p->log(3, p->get_id_by_session(data->s), data->s->tunnel,
 105                                 "         Not throttling user\n");
 106
 107                 data->s->throttle_in = data->s->throttle_out = rate;
 108         }
 109
 110         return PLUGIN_RET_OK;
 111 }
 112
 113 int plugin_init(struct pluginfuncs *funcs)
 114 {
 115         return ((p = funcs)) ? 1 : 0;
 116 }