off by one

[l2tpns.git] / autothrottle.c

diff --git a/autothrottle.c b/autothrottle.c
index 24e97db..1a37809 100644 (file)
--- a/autothrottle.c
+++ b/autothrottle.c
@@ -4,78 +4,108 @@
 
 /* set up throttling based on RADIUS reply */
 
-char const *cvs_id = "$Id: autothrottle.c,v 1.6 2004/11/05 02:39:35 bodea Exp $";
+/*
+ * lcp:interface-config#1=service-policy input N
+ * lcp:interface-config#2=service-policy output N
+ *
+ * throttle=N
+ * throttle=yes (use throttle_rate from config)
+ * throttle=no
+ */
 
-int __plugin_api_version = 1;
+char const *cvs_id = "$Id: autothrottle.c,v 1.14 2005/05/13 05:28:16 bodea Exp $";
+
+int plugin_api_version = PLUGIN_API_VERSION;
 struct pluginfuncs *p;
 
 #define THROTTLE_KEY "lcp:interface-config"
 
 int plugin_radius_response(struct param_radius_response *data)
 {
-       char *t;
-       int i = 0;
-       int rate;
-
-       if (strncmp(data->key, THROTTLE_KEY, strlen(THROTTLE_KEY)) == 0)
+       if (!strncmp(data->key, THROTTLE_KEY, sizeof(THROTTLE_KEY) - 1))
        {
-               char *pt = strdup(data->value);
-               while ((t = strsep(&pt, " ")) != NULL)
+               char *sp = strchr(data->value, ' ');
+               char type;
+               int rate;
+
+               if (!sp || sp - data->value < 4 ||
+                   strncmp("service-policy", data->value, sp - data->value))
+                       return PLUGIN_RET_OK;
+
+               while (*sp == ' ') sp++;
+               data->value = sp;
+
+               if (!(sp = strchr(data->value, ' ')) ||
+                   (strncmp("input", data->value, sp - data->value) &&
+                   strncmp("output", data->value, sp - data->value)))
                {
-                       if (strcmp(t, "serv") == 0)
-                               i = 1;
-                       else if (strcmp(t, "o") && i == 1)
-                               i = 2;
-                       else if (strcmp(t, "i") && i == 1)
-                               i = 3;
-                       else if (i > 1 && (rate = atoi(t)) > 0)
-                       {
-                               switch (i)
-                               {
-                                       case 2: // output
-                                               data->s->throttle_out = rate;
-                                               free(pt);
-                                               p->_log(3, 0, p->get_id_by_session(data->s), data->s->tunnel, "      Set output throttle rate %dkb/s\n", rate);
-                                               return PLUGIN_RET_OK;
-
-                                       case 3: //input
-                                               data->s->throttle_in = rate;
-                                               free(pt);
-                                               p->_log(3, 0, p->get_id_by_session(data->s), data->s->tunnel, "      Set input throttle rate %dkb/s\n", rate);
-                                               return PLUGIN_RET_OK;
-
-                                       default:
-                                               p->_log(1, 0, p->get_id_by_session(data->s), data->s->tunnel, "Syntax error in rate limit AV pair: %s=%s\n", data->key, data->value);
-                                               free(pt);
-                                               return PLUGIN_RET_OK;
-                               }
-                       }
-                       else
-                       {
-                               free(pt);
-                               p->_log(1, 0, p->get_id_by_session(data->s), data->s->tunnel, "Syntax error in rate limit AV pair: %s=%s\n",
-                                       data->key, data->value);
-                               return PLUGIN_RET_OK;
-                       }
+                       p->log(3, p->get_id_by_session(data->s), data->s->tunnel,
+                               "         Not throttling user (invalid type %.*s)\n",
+                               sp - data->value, data->value);
+
+                       return PLUGIN_RET_OK;
                }
-               free(pt);
-       }
-       else if (strcmp(data->key, "throttle") == 0)
-       {
-               if (strcmp(data->value, "yes") == 0)
+
+               type = *data->value;
+
+               while (*sp == ' ') sp++;
+               data->value = sp;
+
+               if ((rate = strtol(data->value, &sp, 10)) < 0 || *sp)
                {
-                       p->_log(3, 0, p->get_id_by_session(data->s), data->s->tunnel, "         Throttling user\n");
-                       data->s->throttle_in = data->s->throttle_out = config->rl_rate;
+                       p->log(3, p->get_id_by_session(data->s), data->s->tunnel,
+                               "         Not throttling user (invalid rate %s)\n",
+                               data->value);
+
+                       return PLUGIN_RET_OK;
+               }
+
+               if (type == 'i')
+               {
+                       data->s->throttle_in = rate;
+                       p->log(3, p->get_id_by_session(data->s), data->s->tunnel,
+                               "         Throttling user input to %dkb/s\n",
+                               rate);
                }
-               else if (strcmp(data->value, "no") == 0)
+               else
                {
-                       p->_log(3, 0, p->get_id_by_session(data->s), data->s->tunnel, "         Not throttling user\n");
-                       data->s->throttle_in = data->s->throttle_out = 0;
+                       data->s->throttle_out = rate;
+                       p->log(3, p->get_id_by_session(data->s), data->s->tunnel,
+                               "         Throttling user output to %dkb/s\n",
+                               rate);
                }
        }
 
-       p->_log(4, 0, p->get_id_by_session(data->s), data->s->tunnel, "autothrottle module ignoring AV pair %s=%s\n",
-               data->key, data->value);
+       if (!strcmp(data->key, "throttle"))
+       {
+               char *e;
+               int rate;
+
+               if ((rate = strtol(data->value, &e, 10)) < 0 || *e)
+               {
+                       rate = -1;
+                       if (!strcmp(data->value, "yes"))
+                       {
+                               unsigned long *ts = p->getconfig("throttle_speed", UNSIGNED_LONG);
+                               if (ts)
+                                       rate = *ts;
+                       }
+                       else if (!strcmp(data->value, "no"))
+                               rate = 0;
+               }
+
+               if (rate < 0)
+                       return PLUGIN_RET_OK;
+
+               if (rate)
+                       p->log(3, p->get_id_by_session(data->s), data->s->tunnel,
+                               "         Throttling user to %dkb/s\n", rate);
+               else
+                       p->log(3, p->get_id_by_session(data->s), data->s->tunnel,
+                               "         Not throttling user\n");
+
+               data->s->throttle_in = data->s->throttle_out = rate;
+       }
 
        return PLUGIN_RET_OK;
 }