ibss.c

   1 #include <errno.h>
   2 #include <string.h>
   3 #include <strings.h>
   4
   5 #include "nl80211.h"
   6 #include "iw.h"
   7
   8 SECTION(ibss);
   9
  10 static int join_ibss(struct nl80211_state *state,
  11                      struct nl_msg *msg,
  12                      int argc, char **argv,
  13                      enum id_input id)
  14 {
  15         char *end;
  16         struct chandef chandef;
  17         unsigned char abssid[6];
  18         unsigned char rates[NL80211_MAX_SUPP_RATES];
  19         int n_rates = 0;
  20         char *value = NULL, *sptr = NULL;
  21         float rate;
  22         int bintval;
  23         int parsed, err;
  24
  25         if (argc < 2)
  26                 return 1;
  27
  28         /* SSID */
  29         NLA_PUT(msg, NL80211_ATTR_SSID, strlen(argv[0]), argv[0]);
  30         argv++;
  31         argc--;
  32
  33         err = parse_freqchan(&chandef, false, argc, argv, &parsed);
  34         if (err)
  35                 return err;
  36
  37         argv += parsed;
  38         argc -= parsed;
  39
  40         err = put_chandef(msg, &chandef);
  41         if (err)
  42                 return err;
  43
  44         if (argc && strcmp(argv[0], "fixed-freq") == 0) {
  45                 NLA_PUT_FLAG(msg, NL80211_ATTR_FREQ_FIXED);
  46                 argv++;
  47                 argc--;
  48         }
  49
  50         if (argc) {
  51                 if (mac_addr_a2n(abssid, argv[0]) == 0) {
  52                         NLA_PUT(msg, NL80211_ATTR_MAC, 6, abssid);
  53                         argv++;
  54                         argc--;
  55                 }
  56         }
  57
  58         if (argc > 1 && strcmp(argv[0], "beacon-interval") == 0) {
  59                 argv++;
  60                 argc--;
  61                 bintval = strtoul(argv[0], &end, 10);
  62                 if (*end != '\0')
  63                         return 1;
  64                 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, bintval);
  65                 argv++;
  66                 argc--;
  67         }
  68
  69         /* basic rates */
  70         if (argc > 1 && strcmp(argv[0], "basic-rates") == 0) {
  71                 argv++;
  72                 argc--;
  73
  74                 value = strtok_r(argv[0], ",", &sptr);
  75
  76                 while (value && n_rates < NL80211_MAX_SUPP_RATES) {
  77                         rate = strtod(value, &end);
  78                         rates[n_rates] = rate * 2;
  79
  80                         /* filter out suspicious values  */
  81                         if (*end != '\0' || !rates[n_rates] ||
  82                             rate*2 != rates[n_rates])
  83                                 return 1;
  84
  85                         n_rates++;
  86                         value = strtok_r(NULL, ",", &sptr);
  87                 }
  88
  89                 NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, n_rates, rates);
  90
  91                 argv++;
  92                 argc--;
  93         }
  94
  95         /* multicast rate */
  96         if (argc > 1 && strcmp(argv[0], "mcast-rate") == 0) {
  97                 argv++;
  98                 argc--;
  99
 100                 rate = strtod(argv[0], &end);
 101                 if (*end != '\0')
 102                         return 1;
 103
 104                 NLA_PUT_U32(msg, NL80211_ATTR_MCAST_RATE, (int)(rate * 10));
 105                 argv++;
 106                 argc--;
 107         }
 108
 109         if (!argc)
 110                 return 0;
 111
 112         if (strcmp(*argv, "key") != 0 && strcmp(*argv, "keys") != 0)
 113                 return 1;
 114
 115         argv++;
 116         argc--;
 117
 118         return parse_keys(msg, &argv, &argc);
 119  nla_put_failure:
 120         return -ENOSPC;
 121 }
 122
 123 static int leave_ibss(struct nl80211_state *state,
 124                       struct nl_msg *msg,
 125                       int argc, char **argv,
 126                       enum id_input id)
 127 {
 128         return 0;
 129 }
 130 COMMAND(ibss, leave, NULL,
 131         NL80211_CMD_LEAVE_IBSS, 0, CIB_NETDEV, leave_ibss,
 132         "Leave the current IBSS cell.");
 133 COMMAND(ibss, join,
 134         "<SSID> <freq in MHz> [NOHT|HT20|HT40+|HT40-|5MHz|10MHz|80MHz] [fixed-freq] [<fixed bssid>] [beacon-interval <TU>]"
 135         " [basic-rates <rate in Mbps,rate2,...>] [mcast-rate <rate in Mbps>] "
 136         "[key d:0:abcde]",
 137         NL80211_CMD_JOIN_IBSS, 0, CIB_NETDEV, join_ibss,
 138         "Join the IBSS cell with the given SSID, if it doesn't exist create\n"
 139         "it on the given frequency. When fixed frequency is requested, don't\n"
 140         "join/create a cell on a different frequency. When a fixed BSSID is\n"
 141         "requested use that BSSID and do not adopt another cell's BSSID even\n"
 142         "if it has higher TSF and the same SSID. If an IBSS is created, create\n"
 143         "it with the specified basic-rates, multicast-rate and beacon-interval.");