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Sourcecode: l2tpns version File versions

throttlectl.c

#include <string.h>
#include "l2tpns.h"
#include "plugin.h"
#include "control.h"

/* throttle control */

char const *cvs_id = "$Id: throttlectl.c,v 1.6 2004/12/01 04:44:29 bodea Exp $";

int plugin_api_version = PLUGIN_API_VERSION;
static struct pluginfuncs *p = 0;

char *plugin_control_help[] = {
      "  throttle USER|SID [RATE|[in|out] RATE ...]  Throttle user traffic",
      "  unthrottle USER|SID                         Stop throttling user",
      0
};

int plugin_init(struct pluginfuncs *funcs)
{
      if (!funcs)
            return 0;

      p = funcs;
      return 1;
}

int plugin_control(struct param_control *data)
{
      sessionidt session;
      sessiont *s = 0;
      int flag;
      char *end;
      int rate_in = 0;
      int rate_out = 0;

      if (data->argc < 1)
            return PLUGIN_RET_OK;

      if (strcmp(data->argv[0], "throttle")
          && strcmp(data->argv[0], "unthrottle"))
            return PLUGIN_RET_OK; // not for us

      if (!data->iam_master)
            return PLUGIN_RET_NOTMASTER;

      flag = data->argv[0][0] == 't';

      if (flag)
      {
            if (data->argc < 2 || data->argc > 6)
            {
                  data->response = NSCTL_RES_ERR;
                  data->additional = "requires username or session id and optional rate(s)";
                  return PLUGIN_RET_STOP;
            }
      }
      else
      {
            if (data->argc != 2)
            {
                  data->response = NSCTL_RES_ERR;
                  data->additional = "requires username or session id";
                  return PLUGIN_RET_STOP;
            }
      }

      if (!(session = strtol(data->argv[1], &end, 10)) || *end)
            session = p->get_session_by_username(data->argv[1]);

      if (session)
            s = p->get_session_by_id(session);

      if (!s || !s->ip)
      {
            data->response = NSCTL_RES_ERR;
            data->additional = "session not found";
            return PLUGIN_RET_STOP;
      }

      if (flag)
      {
            rate_in = rate_out = -1;
            if (data->argc == 2)
            {
                  unsigned long *rate = p->getconfig("throttle_speed", UNSIGNED_LONG);
                  rate_in = rate_out = *rate;
            }
            else if (data->argc == 3)
            {
                  rate_in = rate_out = atoi(data->argv[2]);
            }
            else
            {
                  int i;
                  for (i = 2; i < data->argc - 1; i += 2)
                  {
                        int len = strlen(data->argv[i]);
                        if (!strncmp(data->argv[i], "in", len))
                        {
                              rate_in = atoi(data->argv[i+1]);
                        }
                        else if (!strncmp(data->argv[i], "out", len))
                        {
                              rate_out = atoi(data->argv[i+1]);
                        }
                        else
                        {
                              data->response = NSCTL_RES_ERR;
                              data->additional = "invalid rate";
                              return PLUGIN_RET_STOP;
                        }
                  }
            }

            if (!rate_in || !rate_out)
            {
                  data->response = NSCTL_RES_ERR;
                  data->additional = "invalid rate";
                  return PLUGIN_RET_STOP;
            }
      }

      if (rate_in != -1 && rate_in == s->throttle_in &&
          rate_out != -1 && rate_out == s->throttle_out)
      {
            data->response = NSCTL_RES_ERR;
            data->additional = flag ? "already throttled" : "not throttled";
            return PLUGIN_RET_STOP;
      }

      p->throttle(session, rate_in, rate_out);
      p->session_changed(session);

      data->response = NSCTL_RES_OK;
      data->additional = 0;

      return PLUGIN_RET_STOP;
}

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