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