throttlectl.c

   1 #include <string.h>
   2 #include "l2tpns.h"
   3 #include "plugin.h"
   4 #include "control.h"
   5
   6 /* throttle control */
   7
   8 char const *cvs_id = "$Id: throttlectl.c,v 1.8 2005-10-11 07:59:09 bodea Exp $";
   9
  10 int plugin_api_version = PLUGIN_API_VERSION;
  11 static struct pluginfuncs *p = 0;
  12
  13 char *plugin_control_help[] = {
  14         "  throttle USER|SID [RATE|[in|out] RATE ...]  Throttle user traffic",
  15         "  unthrottle USER|SID                         Stop throttling user",
  16         0
  17 };
  18
  19 int plugin_control(struct param_control *data)
  20 {
  21         sessionidt session;
  22         sessiont *s = 0;
  23         int flag;
  24         char *end;
  25         int rate_in = 0;
  26         int rate_out = 0;
  27
  28         if (data->argc < 1)
  29                 return PLUGIN_RET_OK;
  30
  31         if (strcmp(data->argv[0], "throttle")
  32             && strcmp(data->argv[0], "unthrottle"))
  33                 return PLUGIN_RET_OK; // not for us
  34
  35         if (!data->iam_master)
  36                 return PLUGIN_RET_NOTMASTER;
  37
  38         flag = data->argv[0][0] == 't';
  39
  40         if (flag)
  41         {
  42                 if (data->argc < 2 || data->argc > 6)
  43                 {
  44                         data->response = NSCTL_RES_ERR;
  45                         data->additional = "requires username or session id and optional rate(s)";
  46                         return PLUGIN_RET_STOP;
  47                 }
  48         }
  49         else
  50         {
  51                 if (data->argc != 2)
  52                 {
  53                         data->response = NSCTL_RES_ERR;
  54                         data->additional = "requires username or session id";
  55                         return PLUGIN_RET_STOP;
  56                 }
  57         }
  58
  59         if (!(session = strtol(data->argv[1], &end, 10)) || *end)
  60                 session = p->get_session_by_username(data->argv[1]);
  61
  62         if (session)
  63                 s = p->get_session_by_id(session);
  64
  65         if (!s || !s->ip)
  66         {
  67                 data->response = NSCTL_RES_ERR;
  68                 data->additional = "session not found";
  69                 return PLUGIN_RET_STOP;
  70         }
  71
  72         if (flag)
  73         {
  74                 rate_in = rate_out = -1;
  75                 if (data->argc == 2)
  76                 {
  77                         unsigned long *rate = p->getconfig("throttle_speed", UNSIGNED_LONG);
  78                         rate_in = rate_out = *rate;
  79                 }
  80                 else if (data->argc == 3)
  81                 {
  82                         rate_in = rate_out = atoi(data->argv[2]);
  83                 }
  84                 else
  85                 {
  86                         int i;
  87                         for (i = 2; i < data->argc - 1; i += 2)
  88                         {
  89                                 int len = strlen(data->argv[i]);
  90                                 if (!strncmp(data->argv[i], "in", len))
  91                                 {
  92                                         rate_in = atoi(data->argv[i+1]);
  93                                 }
  94                                 else if (!strncmp(data->argv[i], "out", len))
  95                                 {
  96                                         rate_out = atoi(data->argv[i+1]);
  97                                 }
  98                                 else
  99                                 {
 100                                         data->response = NSCTL_RES_ERR;
 101                                         data->additional = "invalid rate";
 102                                         return PLUGIN_RET_STOP;
 103                                 }
 104                         }
 105                 }
 106
 107                 if (!rate_in || !rate_out)
 108                 {
 109                         data->response = NSCTL_RES_ERR;
 110                         data->additional = "invalid rate";
 111                         return PLUGIN_RET_STOP;
 112                 }
 113         }
 114
 115         if (rate_in != -1 && rate_in == s->throttle_in &&
 116             rate_out != -1 && rate_out == s->throttle_out)
 117         {
 118                 data->response = NSCTL_RES_ERR;
 119                 data->additional = flag ? "already throttled" : "not throttled";
 120                 return PLUGIN_RET_STOP;
 121         }
 122
 123         p->throttle(session, rate_in, rate_out);
 124         p->session_changed(session);
 125
 126         data->response = NSCTL_RES_OK;
 127         data->additional = 0;
 128
 129         return PLUGIN_RET_STOP;
 130 }
 131
 132 int plugin_init(struct pluginfuncs *funcs)
 133 {
 134         return ((p = funcs)) ? 1 : 0;
 135 }