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         unsigned char abssid[6];
  17         unsigned char rates[NL80211_MAX_SUPP_RATES];
  18         int n_rates = 0;
  19         char *value = NULL, *sptr = NULL;
  20         float rate;
  21         int bintval;
  22         unsigned int i;
  23         unsigned long freq;
  24         const struct chanmode *chanmode_selected = NULL;
  25         static const struct chanmode chanmode[] = {
  26                 { .name = "HT20",
  27                   .width = NL80211_CHAN_WIDTH_20,
  28                   .freq1_diff = 0,
  29                   .chantype = NL80211_CHAN_HT20 },
  30                 { .name = "HT40+",
  31                   .width = NL80211_CHAN_WIDTH_40,
  32                   .freq1_diff = 10,
  33                   .chantype = NL80211_CHAN_HT40PLUS },
  34                 { .name = "HT40-",
  35                   .width = NL80211_CHAN_WIDTH_40,
  36                   .freq1_diff = -10,
  37                   .chantype = NL80211_CHAN_HT40MINUS },
  38                 { .name = "NOHT",
  39                   .width = NL80211_CHAN_WIDTH_20_NOHT,
  40                   .freq1_diff = 0,
  41                   .chantype = NL80211_CHAN_NO_HT },
  42                 { .name = "5MHz",
  43                   .width = NL80211_CHAN_WIDTH_5,
  44                   .freq1_diff = 0,
  45                   .chantype = -1 },
  46                 { .name = "10MHz",
  47                   .width = NL80211_CHAN_WIDTH_10,
  48                   .freq1_diff = 0,
  49                   .chantype = -1 },
  50                 { .name = "80MHz",
  51                   .width = NL80211_CHAN_WIDTH_80,
  52                   .freq1_diff = 0,
  53                   .chantype = -1 },
  54         };
  55
  56         if (argc < 2)
  57                 return 1;
  58
  59         /* SSID */
  60         NLA_PUT(msg, NL80211_ATTR_SSID, strlen(argv[0]), argv[0]);
  61         argv++;
  62         argc--;
  63
  64         /* freq */
  65         freq = strtoul(argv[0], &end, 10);
  66         if (*end != '\0')
  67                 return 1;
  68
  69         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
  70         argv++;
  71         argc--;
  72
  73         if (argc) {
  74                 for (i = 0; i < ARRAY_SIZE(chanmode); i++) {
  75                         if (strcasecmp(chanmode[i].name, argv[0]) == 0) {
  76                                 chanmode_selected = &chanmode[i];
  77                                 break;
  78                         }
  79                 }
  80                 if (chanmode_selected) {
  81                         NLA_PUT_U32(msg, NL80211_ATTR_CHANNEL_WIDTH,
  82                                     chanmode_selected->width);
  83                         NLA_PUT_U32(msg, NL80211_ATTR_CENTER_FREQ1,
  84                                     get_cf1(chanmode_selected, freq));
  85                         if (chanmode_selected->chantype != -1)
  86                                 NLA_PUT_U32(msg,
  87                                             NL80211_ATTR_WIPHY_CHANNEL_TYPE,
  88                                             chanmode_selected->chantype);
  89
  90                         argv++;
  91                         argc--;
  92                 }
  93
  94         }
  95
  96         if (argc && strcmp(argv[0], "fixed-freq") == 0) {
  97                 NLA_PUT_FLAG(msg, NL80211_ATTR_FREQ_FIXED);
  98                 argv++;
  99                 argc--;
 100         }
 101
 102         if (argc) {
 103                 if (mac_addr_a2n(abssid, argv[0]) == 0) {
 104                         NLA_PUT(msg, NL80211_ATTR_MAC, 6, abssid);
 105                         argv++;
 106                         argc--;
 107                 }
 108         }
 109
 110         if (argc > 1 && strcmp(argv[0], "beacon-interval") == 0) {
 111                 argv++;
 112                 argc--;
 113                 bintval = strtoul(argv[0], &end, 10);
 114                 if (*end != '\0')
 115                         return 1;
 116                 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, bintval);
 117                 argv++;
 118                 argc--;
 119         }
 120
 121         /* basic rates */
 122         if (argc > 1 && strcmp(argv[0], "basic-rates") == 0) {
 123                 argv++;
 124                 argc--;
 125
 126                 value = strtok_r(argv[0], ",", &sptr);
 127
 128                 while (value && n_rates < NL80211_MAX_SUPP_RATES) {
 129                         rate = strtod(value, &end);
 130                         rates[n_rates] = rate * 2;
 131
 132                         /* filter out suspicious values  */
 133                         if (*end != '\0' || !rates[n_rates] ||
 134                             rate*2 != rates[n_rates])
 135                                 return 1;
 136
 137                         n_rates++;
 138                         value = strtok_r(NULL, ",", &sptr);
 139                 }
 140
 141                 NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, n_rates, rates);
 142
 143                 argv++;
 144                 argc--;
 145         }
 146
 147         /* multicast rate */
 148         if (argc > 1 && strcmp(argv[0], "mcast-rate") == 0) {
 149                 argv++;
 150                 argc--;
 151
 152                 rate = strtod(argv[0], &end);
 153                 if (*end != '\0')
 154                         return 1;
 155
 156                 NLA_PUT_U32(msg, NL80211_ATTR_MCAST_RATE, (int)(rate * 10));
 157                 argv++;
 158                 argc--;
 159         }
 160
 161         if (!argc)
 162                 return 0;
 163
 164         if (strcmp(*argv, "key") != 0 && strcmp(*argv, "keys") != 0)
 165                 return 1;
 166
 167         argv++;
 168         argc--;
 169
 170         return parse_keys(msg, argv, argc);
 171  nla_put_failure:
 172         return -ENOSPC;
 173 }
 174
 175 static int leave_ibss(struct nl80211_state *state,
 176                       struct nl_msg *msg,
 177                       int argc, char **argv,
 178                       enum id_input id)
 179 {
 180         return 0;
 181 }
 182 COMMAND(ibss, leave, NULL,
 183         NL80211_CMD_LEAVE_IBSS, 0, CIB_NETDEV, leave_ibss,
 184         "Leave the current IBSS cell.");
 185 COMMAND(ibss, join,
 186         "<SSID> <freq in MHz> [NOHT|HT20|HT40+|HT40-|5MHz|10MHz|80MHz] [fixed-freq] [<fixed bssid>] [beacon-interval <TU>]"
 187         " [basic-rates <rate in Mbps,rate2,...>] [mcast-rate <rate in Mbps>] "
 188         "[key d:0:abcde]",
 189         NL80211_CMD_JOIN_IBSS, 0, CIB_NETDEV, join_ibss,
 190         "Join the IBSS cell with the given SSID, if it doesn't exist create\n"
 191         "it on the given frequency. When fixed frequency is requested, don't\n"
 192         "join/create a cell on a different frequency. When a fixed BSSID is\n"
 193         "requested use that BSSID and do not adopt another cell's BSSID even\n"
 194         "if it has higher TSF and the same SSID. If an IBSS is created, create\n"
 195         "it with the specified basic-rates, multicast-rate and beacon-interval.");