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 1.3 2004-11-18 06:41:03 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_init(struct pluginfuncs *funcs)
  20 {
  21         if (!funcs)
  22                 return 0;
  23
  24         p = funcs;
  25         return 1;
  26 }
  27
  28 int plugin_control(struct param_control *data)
  29 {
  30         sessionidt session;
  31         sessiont *s = 0;
  32         int flag;
  33         char *end;
  34         int rate_in = 0;
  35         int rate_out = 0;
  36
  37         if (data->argc < 1)
  38                 return PLUGIN_RET_OK;
  39
  40         if (strcmp(data->argv[0], "throttle")
  41             && strcmp(data->argv[0], "unthrottle"))
  42                 return PLUGIN_RET_OK; // not for us
  43
  44         if (!data->iam_master)
  45                 return PLUGIN_RET_NOTMASTER;
  46
  47         flag = data->argv[0][0] != 'g';
  48
  49         if (flag)
  50         {
  51                 if (data->argc < 2 || data->argc > 4)
  52                 {
  53                         data->response = NSCTL_RES_ERR;
  54                         data->additional = "requires username or session id and optional rate(s)";
  55                         return PLUGIN_RET_STOP;
  56                 }
  57         }
  58         else
  59         {
  60                 if (data->argc != 2)
  61                 {
  62                         data->response = NSCTL_RES_ERR;
  63                         data->additional = "requires username or session id";
  64                         return PLUGIN_RET_STOP;
  65                 }
  66         }
  67
  68         if (!(session = strtol(data->argv[1], &end, 10)) || *end)
  69                 session = p->get_session_by_username(data->argv[1]);
  70
  71         if (session)
  72                 s = p->get_session_by_id(session);
  73
  74         if (!s || !s->ip)
  75         {
  76                 data->response = NSCTL_RES_ERR;
  77                 data->additional = "session not found";
  78                 return PLUGIN_RET_STOP;
  79         }
  80
  81         if (flag)
  82         {
  83                 rate_in = rate_out = -1;
  84                 if (data->argc == 2)
  85                 {
  86                         unsigned long *rate = p->getconfig("throttle_speed", UNSIGNED_LONG);
  87                         rate_in = rate_out = *rate;
  88                 }
  89                 else if (data->argc == 3)
  90                 {
  91                         rate_in = rate_out = atoi(data->argv[2]);
  92                 }
  93                 else
  94                 {
  95                         int i;
  96                         for (i = 2; i < data->argc - 1; i += 2)
  97                         {
  98                                 int len = strlen(data->argv[i]);
  99                                 if (!strncmp(data->argv[i], "in", len))
 100                                 {
 101                                         rate_in = atoi(data->argv[i+1]);
 102                                 }
 103                                 else if (!strncmp(data->argv[i], "out", len))
 104                                 {
 105                                         rate_out = atoi(data->argv[i+1]);
 106                                 }
 107                                 else
 108                                 {
 109                                         data->response = NSCTL_RES_ERR;
 110                                         data->additional = "invalid rate";
 111                                         return PLUGIN_RET_STOP;
 112                                 }
 113                         }
 114                 }
 115
 116                 if (!rate_in || !rate_out)
 117                 {
 118                         data->response = NSCTL_RES_ERR;
 119                         data->additional = "invalid rate";
 120                         return PLUGIN_RET_STOP;
 121                 }
 122         }
 123
 124         if (rate_in != -1 && rate_in == s->throttle_in &&
 125             rate_out != -1 && rate_out == s->throttle_out)
 126         {
 127                 data->response = NSCTL_RES_ERR;
 128                 data->additional = flag ? "already throttled" : "not throttled";
 129                 return PLUGIN_RET_STOP;
 130         }
 131
 132         p->throttle(session, rate_in, rate_out);
 133         p->session_changed(session);
 134
 135         data->response = NSCTL_RES_OK;
 136         data->additional = 0;
 137
 138         return PLUGIN_RET_STOP;
 139 }