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,
  13                        struct nl_msg *msg, int argc, char **argv,
  14                        enum id_input id)
  15 {
  16         struct nl_msg *cqm = NULL;
  17         int thold = 0;
  18         int hyst = 0;
  19         int ret = -ENOSPC;
  20
  21         /* get the required args */
  22         if (argc < 1 || argc > 2)
  23                 return 1;
  24
  25         if (strcmp(argv[0], "off")) {
  26                 thold = atoi(argv[0]);
  27
  28                 if (thold == 0)
  29                         return -EINVAL;
  30
  31                 if (argc == 2)
  32                         hyst = atoi(argv[1]);
  33         }
  34
  35         /* connection quality monitor attributes */
  36         cqm = nlmsg_alloc();
  37         if (!cqm)
  38                 return -ENOMEM;
  39
  40         NLA_PUT_U32(cqm, NL80211_ATTR_CQM_RSSI_THOLD, thold);
  41         NLA_PUT_U32(cqm, NL80211_ATTR_CQM_RSSI_HYST, hyst);
  42
  43         nla_put_nested(msg, NL80211_ATTR_CQM, cqm);
  44         ret = 0;
  45
  46  nla_put_failure:
  47         nlmsg_free(cqm);
  48         return ret;
  49 }
  50
  51 TOPLEVEL(cqm, "",
  52          0, 0, CIB_NETDEV, NULL,
  53          "Configure the WLAN connection quality monitor.\n");
  54
  55 COMMAND(cqm, rssi, "<threshold|off> [<hysteresis>]",
  56         NL80211_CMD_SET_CQM, 0, CIB_NETDEV, iw_cqm_rssi,
  57         "Set connection quality monitor RSSI threshold.\n");