cqm.c

   1 #include <errno.h>
   2
   3 #include <netlink/genl/genl.h>
   4 #include <netlink/genl/family.h>
   5 #include <netlink/genl/ctrl.h>
   6 #include <netlink/msg.h>
   7 #include <netlink/attr.h>
   8
   9 #include "nl80211.h"
  10 #include "iw.h"
  11
  12 static int iw_cqm_rssi(struct nl80211_state *state, struct nl_cb *cb,
  13                        struct nl_msg *msg, int argc, char **argv)
  14 {
  15         struct nl_msg *cqm = NULL;
  16         int thold = 0;
  17         int hyst = 0;
  18         int ret = -ENOSPC;
  19
  20         /* get the required args */
  21         if (argc < 1 || argc > 2)
  22                 return 1;
  23
  24         if (strcmp(argv[0], "off")) {
  25                 thold = atoi(argv[0]);
  26
  27                 if (thold == 0)
  28                         return -EINVAL;
  29
  30                 if (argc == 2)
  31                         hyst = atoi(argv[1]);
  32         }
  33
  34         /* connection quality monitor attributes */
  35         cqm = nlmsg_alloc();
  36
  37         NLA_PUT_U32(cqm, NL80211_ATTR_CQM_RSSI_THOLD, thold);
  38         NLA_PUT_U32(cqm, NL80211_ATTR_CQM_RSSI_HYST, hyst);
  39
  40         nla_put_nested(msg, NL80211_ATTR_CQM, cqm);
  41         ret = 0;
  42
  43  nla_put_failure:
  44         nlmsg_free(cqm);
  45         return ret;
  46 }
  47
  48 TOPLEVEL(cqm, "",
  49          0, 0, CIB_NETDEV, NULL,
  50          "Configure the WLAN connection quality monitor.\n");
  51
  52 COMMAND(cqm, rssi, "<threshold|off> [<hysteresis>]",
  53         NL80211_CMD_SET_CQM, 0, CIB_NETDEV, iw_cqm_rssi,
  54         "Set connection quality monitor RSSI threshold.\n");