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