ibss.c

   1 #ifndef _POSIX_SOURCE
   2 #define _POSIX_SOURCE
   3 #endif
   4 #include <errno.h>
   5 #include <string.h>
   6 #include <strings.h>
   7
   8 #include <netlink/genl/genl.h>
   9 #include <netlink/genl/family.h>
  10 #include <netlink/genl/ctrl.h>
  11 #include <netlink/msg.h>
  12 #include <netlink/attr.h>
  13
  14 #include "nl80211.h"
  15 #include "iw.h"
  16
  17 SECTION(ibss);
  18
  19 static int join_ibss(struct nl80211_state *state,
  20                      struct nl_msg *msg,
  21                      int argc, char **argv,
  22                      enum id_input id)
  23 {
  24         char *end;
  25         unsigned char abssid[6];
  26         unsigned char rates[NL80211_MAX_SUPP_RATES];
  27         int n_rates = 0;
  28         char *value = NULL, *sptr = NULL;
  29         float rate;
  30         int bintval;
  31         unsigned int i;
  32         unsigned long freq;
  33         const struct chanmode *chanmode_selected = NULL;
  34         static const struct chanmode chanmode[] = {
  35                 { .name = "HT20",
  36                   .width = NL80211_CHAN_WIDTH_20,
  37                   .freq1_diff = 0,
  38                   .chantype = NL80211_CHAN_HT20 },
  39                 { .name = "HT40+",
  40                   .width = NL80211_CHAN_WIDTH_40,
  41                   .freq1_diff = 10,
  42                   .chantype = NL80211_CHAN_HT40PLUS },
  43                 { .name = "HT40-",
  44                   .width = NL80211_CHAN_WIDTH_40,
  45                   .freq1_diff = -10,
  46                   .chantype = NL80211_CHAN_HT40MINUS },
  47                 { .name = "NOHT",
  48                   .width = NL80211_CHAN_WIDTH_20_NOHT,
  49                   .freq1_diff = 0,
  50                   .chantype = NL80211_CHAN_NO_HT },
  51                 { .name = "5MHz",
  52                   .width = NL80211_CHAN_WIDTH_5,
  53                   .freq1_diff = 0,
  54                   .chantype = -1 },
  55                 { .name = "10MHz",
  56                   .width = NL80211_CHAN_WIDTH_10,
  57                   .freq1_diff = 0,
  58                   .chantype = -1 },
  59                 { .name = "80MHz",
  60                   .width = NL80211_CHAN_WIDTH_80,
  61                   .freq1_diff = 0,
  62                   .chantype = -1 },
  63         };
  64
  65         if (argc < 2)
  66                 return 1;
  67
  68         /* SSID */
  69         NLA_PUT(msg, NL80211_ATTR_SSID, strlen(argv[0]), argv[0]);
  70         argv++;
  71         argc--;
  72
  73         /* freq */
  74         freq = strtoul(argv[0], &end, 10);
  75         if (*end != '\0')
  76                 return 1;
  77
  78         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
  79         argv++;
  80         argc--;
  81
  82         if (argc) {
  83                 for (i = 0; i < ARRAY_SIZE(chanmode); i++) {
  84                         if (strcasecmp(chanmode[i].name, argv[0]) == 0) {
  85                                 chanmode_selected = &chanmode[i];
  86                                 break;
  87                         }
  88                 }
  89                 if (chanmode_selected) {
  90                         NLA_PUT_U32(msg, NL80211_ATTR_CHANNEL_WIDTH,
  91                                     chanmode_selected->width);
  92                         NLA_PUT_U32(msg, NL80211_ATTR_CENTER_FREQ1,
  93                                     get_cf1(chanmode_selected, freq));
  94                         if (chanmode_selected->chantype != -1)
  95                                 NLA_PUT_U32(msg,
  96                                             NL80211_ATTR_WIPHY_CHANNEL_TYPE,
  97                                             chanmode_selected->chantype);
  98
  99                         argv++;
 100                         argc--;
 101                 }
 102
 103         }
 104
 105         if (argc && strcmp(argv[0], "fixed-freq") == 0) {
 106                 NLA_PUT_FLAG(msg, NL80211_ATTR_FREQ_FIXED);
 107                 argv++;
 108                 argc--;
 109         }
 110
 111         if (argc) {
 112                 if (mac_addr_a2n(abssid, argv[0]) == 0) {
 113                         NLA_PUT(msg, NL80211_ATTR_MAC, 6, abssid);
 114                         argv++;
 115                         argc--;
 116                 }
 117         }
 118
 119         if (argc > 1 && strcmp(argv[0], "beacon-interval") == 0) {
 120                 argv++;
 121                 argc--;
 122                 bintval = strtoul(argv[0], &end, 10);
 123                 if (*end != '\0')
 124                         return 1;
 125                 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, bintval);
 126                 argv++;
 127                 argc--;
 128         }
 129
 130         /* basic rates */
 131         if (argc > 1 && strcmp(argv[0], "basic-rates") == 0) {
 132                 argv++;
 133                 argc--;
 134
 135                 value = strtok_r(argv[0], ",", &sptr);
 136
 137                 while (value && n_rates < NL80211_MAX_SUPP_RATES) {
 138                         rate = strtod(value, &end);
 139                         rates[n_rates] = rate * 2;
 140
 141                         /* filter out suspicious values  */
 142                         if (*end != '\0' || !rates[n_rates] ||
 143                             rate*2 != rates[n_rates])
 144                                 return 1;
 145
 146                         n_rates++;
 147                         value = strtok_r(NULL, ",", &sptr);
 148                 }
 149
 150                 NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, n_rates, rates);
 151
 152                 argv++;
 153                 argc--;
 154         }
 155
 156         /* multicast rate */
 157         if (argc > 1 && strcmp(argv[0], "mcast-rate") == 0) {
 158                 argv++;
 159                 argc--;
 160
 161                 rate = strtod(argv[0], &end);
 162                 if (*end != '\0')
 163                         return 1;
 164
 165                 NLA_PUT_U32(msg, NL80211_ATTR_MCAST_RATE, (int)(rate * 10));
 166                 argv++;
 167                 argc--;
 168         }
 169
 170         if (!argc)
 171                 return 0;
 172
 173         if (strcmp(*argv, "key") != 0 && strcmp(*argv, "keys") != 0)
 174                 return 1;
 175
 176         argv++;
 177         argc--;
 178
 179         return parse_keys(msg, argv, argc);
 180  nla_put_failure:
 181         return -ENOSPC;
 182 }
 183
 184 static int leave_ibss(struct nl80211_state *state,
 185                       struct nl_msg *msg,
 186                       int argc, char **argv,
 187                       enum id_input id)
 188 {
 189         return 0;
 190 }
 191 COMMAND(ibss, leave, NULL,
 192         NL80211_CMD_LEAVE_IBSS, 0, CIB_NETDEV, leave_ibss,
 193         "Leave the current IBSS cell.");
 194 COMMAND(ibss, join,
 195         "<SSID> <freq in MHz> [NOHT|HT20|HT40+|HT40-|5MHz|10MHz|80MHz] [fixed-freq] [<fixed bssid>] [beacon-interval <TU>]"
 196         " [basic-rates <rate in Mbps,rate2,...>] [mcast-rate <rate in Mbps>] "
 197         "[key d:0:abcde]",
 198         NL80211_CMD_JOIN_IBSS, 0, CIB_NETDEV, join_ibss,
 199         "Join the IBSS cell with the given SSID, if it doesn't exist create\n"
 200         "it on the given frequency. When fixed frequency is requested, don't\n"
 201         "join/create a cell on a different frequency. When a fixed BSSID is\n"
 202         "requested use that BSSID and do not adopt another cell's BSSID even\n"
 203         "if it has higher TSF and the same SSID. If an IBSS is created, create\n"
 204         "it with the specified basic-rates, multicast-rate and beacon-interval.");