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