info.c

   1 #include <stdbool.h>
   2 #include <errno.h>
   3 #include <net/if.h>
   4
   5 #include <netlink/genl/genl.h>
   6 #include <netlink/genl/family.h>
   7 #include <netlink/genl/ctrl.h>
   8 #include <netlink/msg.h>
   9 #include <netlink/attr.h>
  10
  11 #include "nl80211.h"
  12 #include "iw.h"
  13
  14 static void print_flag(const char *name, int *open)
  15 {
  16         if (!*open)
  17                 printf(" (");
  18         else
  19                 printf(", ");
  20         printf("%s", name);
  21         *open = 1;
  22 }
  23
  24 static int print_phy_handler(struct nl_msg *msg, void *arg)
  25 {
  26         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
  27         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
  28
  29         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
  30
  31         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
  32         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
  33                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
  34                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
  35                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
  36                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
  37                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
  38                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
  39         };
  40
  41         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
  42         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
  43                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
  44                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
  45         };
  46
  47         struct nlattr *nl_band;
  48         struct nlattr *nl_freq;
  49         struct nlattr *nl_rate;
  50         struct nlattr *nl_mode;
  51         struct nlattr *nl_cmd;
  52         struct nlattr *nl_if, *nl_ftype;
  53         int bandidx = 1;
  54         int rem_band, rem_freq, rem_rate, rem_mode, rem_cmd, rem_ftype, rem_if;
  55         int open;
  56
  57         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
  58                   genlmsg_attrlen(gnlh, 0), NULL);
  59
  60         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
  61                 return NL_SKIP;
  62
  63         if (tb_msg[NL80211_ATTR_WIPHY_NAME])
  64                 printf("Wiphy %s\n", nla_get_string(tb_msg[NL80211_ATTR_WIPHY_NAME]));
  65
  66         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
  67                 printf("\tBand %d:\n", bandidx);
  68                 bandidx++;
  69
  70                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
  71                           nla_len(nl_band), NULL);
  72
  73 #ifdef NL80211_BAND_ATTR_HT_CAPA
  74                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
  75                         __u16 cap = nla_get_u16(tb_band[NL80211_BAND_ATTR_HT_CAPA]);
  76                         print_ht_capability(cap);
  77                 }
  78                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) {
  79                         __u8 exponent = nla_get_u8(tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]);
  80                         print_ampdu_length(exponent);
  81                 }
  82                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) {
  83                         __u8 spacing = nla_get_u8(tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]);
  84                         print_ampdu_spacing(spacing);
  85                 }
  86                 if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
  87                     nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]) == 16)
  88                         print_ht_mcs(nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]));
  89 #endif
  90
  91                 printf("\t\tFrequencies:\n");
  92
  93                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
  94                         uint32_t freq;
  95                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
  96                                   nla_len(nl_freq), freq_policy);
  97                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
  98                                 continue;
  99                         freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
 100                         printf("\t\t\t* %d MHz [%d]", freq, ieee80211_frequency_to_channel(freq));
 101
 102                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
 103                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
 104                                 printf(" (%.1f dBm)", 0.01 * nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]));
 105
 106                         open = 0;
 107                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED]) {
 108                                 print_flag("disabled", &open);
 109                                 goto next;
 110                         }
 111                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
 112                                 print_flag("passive scanning", &open);
 113                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
 114                                 print_flag("no IBSS", &open);
 115                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
 116                                 print_flag("radar detection", &open);
 117  next:
 118                         if (open)
 119                                 printf(")");
 120                         printf("\n");
 121                 }
 122
 123                 printf("\t\tBitrates (non-HT):\n");
 124
 125                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
 126                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
 127                                   nla_len(nl_rate), rate_policy);
 128                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
 129                                 continue;
 130                         printf("\t\t\t* %2.1f Mbps", 0.1 * nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]));
 131                         open = 0;
 132                         if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
 133                                 print_flag("short preamble supported", &open);
 134                         if (open)
 135                                 printf(")");
 136                         printf("\n");
 137                 }
 138         }
 139
 140         if (tb_msg[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
 141                 printf("\tmax # scan SSIDs: %d\n",
 142                        nla_get_u8(tb_msg[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]));
 143         if (tb_msg[NL80211_ATTR_MAX_SCAN_IE_LEN])
 144                 printf("\tmax scan IEs length: %d bytes\n",
 145                        nla_get_u16(tb_msg[NL80211_ATTR_MAX_SCAN_IE_LEN]));
 146
 147         if (tb_msg[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
 148                 unsigned int frag;
 149
 150                 frag = nla_get_u32(tb_msg[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
 151                 if (frag != (unsigned int)-1)
 152                         printf("\tFragmentation threshold: %d\n", frag);
 153         }
 154
 155         if (tb_msg[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
 156                 unsigned int rts;
 157
 158                 rts = nla_get_u32(tb_msg[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
 159                 if (rts != (unsigned int)-1)
 160                         printf("\tRTS threshold: %d\n", rts);
 161         }
 162
 163         if (tb_msg[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
 164                 unsigned char coverage;
 165
 166                 coverage = nla_get_u8(tb_msg[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
 167                 /* See handle_distance() for an explanation where the '450' comes from */
 168                 printf("\tCoverage class: %d (up to %dm)\n", coverage, 450 * coverage);
 169         }
 170
 171         if (tb_msg[NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX] &&
 172             tb_msg[NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX])
 173                 printf("\tAvailable Antennas: TX %#x RX %#x\n",
 174                        nla_get_u32(tb_msg[NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX]),
 175                        nla_get_u32(tb_msg[NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX]));
 176
 177         if (tb_msg[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
 178             tb_msg[NL80211_ATTR_WIPHY_ANTENNA_RX])
 179                 printf("\tConfigured Antennas: TX %#x RX %#x\n",
 180                        nla_get_u32(tb_msg[NL80211_ATTR_WIPHY_ANTENNA_TX]),
 181                        nla_get_u32(tb_msg[NL80211_ATTR_WIPHY_ANTENNA_RX]));
 182
 183         if (tb_msg[NL80211_ATTR_SUPPORTED_IFTYPES]) {
 184                 printf("\tSupported interface modes:\n");
 185                 nla_for_each_nested(nl_mode, tb_msg[NL80211_ATTR_SUPPORTED_IFTYPES], rem_mode)
 186                         printf("\t\t * %s\n", iftype_name(nla_type(nl_mode)));
 187         }
 188
 189         if (tb_msg[NL80211_ATTR_SOFTWARE_IFTYPES]) {
 190                 printf("\tsoftware interface modes (can always be added):\n");
 191                 nla_for_each_nested(nl_mode, tb_msg[NL80211_ATTR_SOFTWARE_IFTYPES], rem_mode)
 192                         printf("\t\t * %s\n", iftype_name(nla_type(nl_mode)));
 193         }
 194
 195         if (tb_msg[NL80211_ATTR_INTERFACE_COMBINATIONS]) {
 196                 struct nlattr *nl_combi;
 197                 int rem_combi;
 198
 199                 printf("\tvalid interface combinations:\n");
 200
 201                 nla_for_each_nested(nl_combi, tb_msg[NL80211_ATTR_INTERFACE_COMBINATIONS], rem_combi) {
 202                         static struct nla_policy iface_combination_policy[NUM_NL80211_IFACE_COMB] = {
 203                                 [NL80211_IFACE_COMB_LIMITS] = { .type = NLA_NESTED },
 204                                 [NL80211_IFACE_COMB_MAXNUM] = { .type = NLA_U32 },
 205                                 [NL80211_IFACE_COMB_STA_AP_BI_MATCH] = { .type = NLA_FLAG },
 206                                 [NL80211_IFACE_COMB_NUM_CHANNELS] = { .type = NLA_U32 },
 207                         };
 208                         struct nlattr *tb_comb[NUM_NL80211_IFACE_COMB];
 209                         static struct nla_policy iface_limit_policy[NUM_NL80211_IFACE_LIMIT] = {
 210                                 [NL80211_IFACE_LIMIT_TYPES] = { .type = NLA_NESTED },
 211                                 [NL80211_IFACE_LIMIT_MAX] = { .type = NLA_U32 },
 212                         };
 213                         struct nlattr *tb_limit[NUM_NL80211_IFACE_LIMIT];
 214                         struct nlattr *nl_limit;
 215                         int err, rem_limit;
 216                         bool comma = false;
 217
 218                         printf("\t\t * ");
 219
 220                         err = nla_parse_nested(tb_comb, MAX_NL80211_IFACE_COMB,
 221                                                nl_combi, iface_combination_policy);
 222                         if (err || !tb_comb[NL80211_IFACE_COMB_LIMITS] ||
 223                             !tb_comb[NL80211_IFACE_COMB_MAXNUM] ||
 224                             !tb_comb[NL80211_IFACE_COMB_NUM_CHANNELS]) {
 225                                 printf(" <failed to parse>\n");
 226                                 goto broken_combination;
 227                         }
 228
 229                         nla_for_each_nested(nl_limit, tb_comb[NL80211_IFACE_COMB_LIMITS], rem_limit) {
 230                                 bool ift_comma = false;
 231
 232                                 err = nla_parse_nested(tb_limit, MAX_NL80211_IFACE_LIMIT,
 233                                                        nl_limit, iface_limit_policy);
 234                                 if (err || !tb_limit[NL80211_IFACE_LIMIT_TYPES]) {
 235                                         printf("<failed to parse>\n");
 236                                         goto broken_combination;
 237                                 }
 238
 239                                 if (comma)
 240                                         printf(", ");
 241                                 comma = true;
 242                                 printf("#{");
 243
 244                                 nla_for_each_nested(nl_mode, tb_limit[NL80211_IFACE_LIMIT_TYPES], rem_mode) {
 245                                         printf("%s %s", ift_comma ? "," : "",
 246                                                 iftype_name(nla_type(nl_mode)));
 247                                         ift_comma = true;
 248                                 }
 249                                 printf(" } <= %u", nla_get_u32(tb_limit[NL80211_IFACE_LIMIT_MAX]));
 250                         }
 251                         printf(",\n\t\t   ");
 252
 253                         printf("total <= %d, #channels <= %d%s\n",
 254                                 nla_get_u32(tb_comb[NL80211_IFACE_COMB_MAXNUM]),
 255                                 nla_get_u32(tb_comb[NL80211_IFACE_COMB_NUM_CHANNELS]),
 256                                 tb_comb[NL80211_IFACE_COMB_STA_AP_BI_MATCH] ?
 257                                         ", STA/AP BI must match" : "");
 258 broken_combination:
 259                         ;
 260                 }
 261         }
 262
 263         if (tb_msg[NL80211_ATTR_SUPPORTED_COMMANDS]) {
 264                 printf("\tSupported commands:\n");
 265                 nla_for_each_nested(nl_cmd, tb_msg[NL80211_ATTR_SUPPORTED_COMMANDS], rem_cmd)
 266                         printf("\t\t * %s\n", command_name(nla_get_u32(nl_cmd)));
 267         }
 268
 269         if (tb_msg[NL80211_ATTR_TX_FRAME_TYPES]) {
 270                 printf("\tSupported TX frame types:\n");
 271                 nla_for_each_nested(nl_if, tb_msg[NL80211_ATTR_TX_FRAME_TYPES], rem_if) {
 272                         bool printed = false;
 273                         nla_for_each_nested(nl_ftype, nl_if, rem_ftype) {
 274                                 if (!printed)
 275                                         printf("\t\t * %s:", iftype_name(nla_type(nl_if)));
 276                                 printed = true;
 277                                 printf(" 0x%.4x", nla_get_u16(nl_ftype));
 278                         }
 279                         if (printed)
 280                                 printf("\n");
 281                 }
 282         }
 283
 284         if (tb_msg[NL80211_ATTR_RX_FRAME_TYPES]) {
 285                 printf("\tSupported RX frame types:\n");
 286                 nla_for_each_nested(nl_if, tb_msg[NL80211_ATTR_RX_FRAME_TYPES], rem_if) {
 287                         bool printed = false;
 288                         nla_for_each_nested(nl_ftype, nl_if, rem_ftype) {
 289                                 if (!printed)
 290                                         printf("\t\t * %s:", iftype_name(nla_type(nl_if)));
 291                                 printed = true;
 292                                 printf(" 0x%.4x", nla_get_u16(nl_ftype));
 293                         }
 294                         if (printed)
 295                                 printf("\n");
 296                 }
 297         }
 298
 299         if (tb_msg[NL80211_ATTR_SUPPORT_IBSS_RSN])
 300                 printf("\tDevice supports RSN-IBSS.\n");
 301
 302         if (tb_msg[NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED]) {
 303                 struct nlattr *tb_wowlan[NUM_NL80211_WOWLAN_TRIG];
 304                 static struct nla_policy wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 305                         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 306                         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 307                         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 308                         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = {
 309                                 .minlen = sizeof(struct nl80211_wowlan_pattern_support),
 310                         },
 311                 };
 312                 struct nl80211_wowlan_pattern_support *pat;
 313                 int err;
 314
 315                 err = nla_parse_nested(tb_wowlan, MAX_NL80211_WOWLAN_TRIG,
 316                                        tb_msg[NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED],
 317                                        wowlan_policy);
 318                 printf("\tWoWLAN support:");
 319                 if (err) {
 320                         printf(" <failed to parse>\n");
 321                 } else {
 322                         printf("\n");
 323                         if (tb_wowlan[NL80211_WOWLAN_TRIG_ANY])
 324                                 printf("\t\t * any (device continues operating)\n");
 325                         if (tb_wowlan[NL80211_WOWLAN_TRIG_DISCONNECT])
 326                                 printf("\t\t * disconnect\n");
 327                         if (tb_wowlan[NL80211_WOWLAN_TRIG_MAGIC_PKT])
 328                                 printf("\t\t * magic packet\n");
 329                         if (tb_wowlan[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
 330                                 pat = nla_data(tb_wowlan[NL80211_WOWLAN_TRIG_PKT_PATTERN]);
 331                                 printf("\t\t * up to %u patterns of %u-%u bytes\n",
 332                                         pat->max_patterns, pat->min_pattern_len, pat->max_pattern_len);
 333                         }
 334                 }
 335         }
 336
 337         return NL_SKIP;
 338 }
 339
 340 static int handle_info(struct nl80211_state *state,
 341                        struct nl_cb *cb,
 342                        struct nl_msg *msg,
 343                        int argc, char **argv)
 344 {
 345         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, print_phy_handler, NULL);
 346
 347         return 0;
 348 }
 349 __COMMAND(NULL, info, "info", NULL, NL80211_CMD_GET_WIPHY, 0, 0, CIB_PHY, handle_info,
 350          "Show capabilities for the specified wireless device.", NULL);
 351 TOPLEVEL(list, NULL, NL80211_CMD_GET_WIPHY, NLM_F_DUMP, CIB_NONE, handle_info,
 352          "List all wireless devices and their capabilities.");
 353 TOPLEVEL(phy, NULL, NL80211_CMD_GET_WIPHY, NLM_F_DUMP, CIB_NONE, handle_info, NULL);