src/drivers/driver_common.c

   1 /*
   2  * Common driver-related functions
   3  * Copyright (c) 2003-2017, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "includes.h"
  10 #include "utils/common.h"
  11 #include "driver.h"
  12
  13 void wpa_scan_results_free(struct wpa_scan_results *res)
  14 {
  15         size_t i;
  16
  17         if (res == NULL)
  18                 return;
  19
  20         for (i = 0; i < res->num; i++)
  21                 os_free(res->res[i]);
  22         os_free(res->res);
  23         os_free(res);
  24 }
  25
  26
  27 const char * event_to_string(enum wpa_event_type event)
  28 {
  29 #define E2S(n) case EVENT_ ## n: return #n
  30         switch (event) {
  31         E2S(ASSOC);
  32         E2S(DISASSOC);
  33         E2S(MICHAEL_MIC_FAILURE);
  34         E2S(SCAN_RESULTS);
  35         E2S(ASSOCINFO);
  36         E2S(INTERFACE_STATUS);
  37         E2S(PMKID_CANDIDATE);
  38         E2S(TDLS);
  39         E2S(FT_RESPONSE);
  40         E2S(IBSS_RSN_START);
  41         E2S(AUTH);
  42         E2S(DEAUTH);
  43         E2S(ASSOC_REJECT);
  44         E2S(AUTH_TIMED_OUT);
  45         E2S(ASSOC_TIMED_OUT);
  46         E2S(WPS_BUTTON_PUSHED);
  47         E2S(TX_STATUS);
  48         E2S(RX_FROM_UNKNOWN);
  49         E2S(RX_MGMT);
  50         E2S(REMAIN_ON_CHANNEL);
  51         E2S(CANCEL_REMAIN_ON_CHANNEL);
  52         E2S(RX_PROBE_REQ);
  53         E2S(NEW_STA);
  54         E2S(EAPOL_RX);
  55         E2S(SIGNAL_CHANGE);
  56         E2S(INTERFACE_ENABLED);
  57         E2S(INTERFACE_DISABLED);
  58         E2S(CHANNEL_LIST_CHANGED);
  59         E2S(INTERFACE_UNAVAILABLE);
  60         E2S(BEST_CHANNEL);
  61         E2S(UNPROT_DEAUTH);
  62         E2S(UNPROT_DISASSOC);
  63         E2S(STATION_LOW_ACK);
  64         E2S(IBSS_PEER_LOST);
  65         E2S(DRIVER_GTK_REKEY);
  66         E2S(SCHED_SCAN_STOPPED);
  67         E2S(DRIVER_CLIENT_POLL_OK);
  68         E2S(EAPOL_TX_STATUS);
  69         E2S(CH_SWITCH);
  70         E2S(WNM);
  71         E2S(CONNECT_FAILED_REASON);
  72         E2S(DFS_RADAR_DETECTED);
  73         E2S(DFS_CAC_FINISHED);
  74         E2S(DFS_CAC_ABORTED);
  75         E2S(DFS_NOP_FINISHED);
  76         E2S(SURVEY);
  77         E2S(SCAN_STARTED);
  78         E2S(AVOID_FREQUENCIES);
  79         E2S(NEW_PEER_CANDIDATE);
  80         E2S(ACS_CHANNEL_SELECTED);
  81         E2S(DFS_CAC_STARTED);
  82         E2S(P2P_LO_STOP);
  83         E2S(BEACON_LOSS);
  84         E2S(DFS_PRE_CAC_EXPIRED);
  85         E2S(EXTERNAL_AUTH);
  86         E2S(PORT_AUTHORIZED);
  87         E2S(STATION_OPMODE_CHANGED);
  88         E2S(INTERFACE_MAC_CHANGED);
  89         E2S(WDS_STA_INTERFACE_STATUS);
  90         }
  91
  92         return "UNKNOWN";
  93 #undef E2S
  94 }
  95
  96
  97 const char * channel_width_to_string(enum chan_width width)
  98 {
  99         switch (width) {
 100         case CHAN_WIDTH_20_NOHT:
 101                 return "20 MHz (no HT)";
 102         case CHAN_WIDTH_20:
 103                 return "20 MHz";
 104         case CHAN_WIDTH_40:
 105                 return "40 MHz";
 106         case CHAN_WIDTH_80:
 107                 return "80 MHz";
 108         case CHAN_WIDTH_80P80:
 109                 return "80+80 MHz";
 110         case CHAN_WIDTH_160:
 111                 return "160 MHz";
 112         default:
 113                 return "unknown";
 114         }
 115 }
 116
 117
 118 int ht_supported(const struct hostapd_hw_modes *mode)
 119 {
 120         if (!(mode->flags & HOSTAPD_MODE_FLAG_HT_INFO_KNOWN)) {
 121                 /*
 122                  * The driver did not indicate whether it supports HT. Assume
 123                  * it does to avoid connection issues.
 124                  */
 125                 return 1;
 126         }
 127
 128         /*
 129          * IEEE Std 802.11n-2009 20.1.1:
 130          * An HT non-AP STA shall support all EQM rates for one spatial stream.
 131          */
 132         return mode->mcs_set[0] == 0xff;
 133 }
 134
 135
 136 int vht_supported(const struct hostapd_hw_modes *mode)
 137 {
 138         if (!(mode->flags & HOSTAPD_MODE_FLAG_VHT_INFO_KNOWN)) {
 139                 /*
 140                  * The driver did not indicate whether it supports VHT. Assume
 141                  * it does to avoid connection issues.
 142                  */
 143                 return 1;
 144         }
 145
 146         /*
 147          * A VHT non-AP STA shall support MCS 0-7 for one spatial stream.
 148          * TODO: Verify if this complies with the standard
 149          */
 150         return (mode->vht_mcs_set[0] & 0x3) != 3;
 151 }
 152
 153
 154 static int wpa_check_wowlan_trigger(const char *start, const char *trigger,
 155                                     int capa_trigger, u8 *param_trigger)
 156 {
 157         if (os_strcmp(start, trigger) != 0)
 158                 return 0;
 159         if (!capa_trigger)
 160                 return 0;
 161
 162         *param_trigger = 1;
 163         return 1;
 164 }
 165
 166
 167 struct wowlan_triggers *
 168 wpa_get_wowlan_triggers(const char *wowlan_triggers,
 169                         const struct wpa_driver_capa *capa)
 170 {
 171         struct wowlan_triggers *triggers;
 172         char *start, *end, *buf;
 173         int last;
 174
 175         if (!wowlan_triggers)
 176                 return NULL;
 177
 178         buf = os_strdup(wowlan_triggers);
 179         if (buf == NULL)
 180                 return NULL;
 181
 182         triggers = os_zalloc(sizeof(*triggers));
 183         if (triggers == NULL)
 184                 goto out;
 185
 186 #define CHECK_TRIGGER(trigger) \
 187         wpa_check_wowlan_trigger(start, #trigger,                       \
 188                                   capa->wowlan_triggers.trigger,        \
 189                                   &triggers->trigger)
 190
 191         start = buf;
 192         while (*start != '\0') {
 193                 while (isblank((unsigned char) *start))
 194                         start++;
 195                 if (*start == '\0')
 196                         break;
 197                 end = start;
 198                 while (!isblank((unsigned char) *end) && *end != '\0')
 199                         end++;
 200                 last = *end == '\0';
 201                 *end = '\0';
 202
 203                 if (!CHECK_TRIGGER(any) &&
 204                     !CHECK_TRIGGER(disconnect) &&
 205                     !CHECK_TRIGGER(magic_pkt) &&
 206                     !CHECK_TRIGGER(gtk_rekey_failure) &&
 207                     !CHECK_TRIGGER(eap_identity_req) &&
 208                     !CHECK_TRIGGER(four_way_handshake) &&
 209                     !CHECK_TRIGGER(rfkill_release)) {
 210                         wpa_printf(MSG_DEBUG,
 211                                    "Unknown/unsupported wowlan trigger '%s'",
 212                                    start);
 213                         os_free(triggers);
 214                         triggers = NULL;
 215                         goto out;
 216                 }
 217
 218                 if (last)
 219                         break;
 220                 start = end + 1;
 221         }
 222 #undef CHECK_TRIGGER
 223
 224 out:
 225         os_free(buf);
 226         return triggers;
 227 }
 228
 229
 230 const char * driver_flag_to_string(u64 flag)
 231 {
 232 #define DF2S(x) case WPA_DRIVER_FLAGS_ ## x: return #x
 233         switch (flag) {
 234         DF2S(DRIVER_IE);
 235         DF2S(SET_KEYS_AFTER_ASSOC);
 236         DF2S(DFS_OFFLOAD);
 237         DF2S(4WAY_HANDSHAKE);
 238         DF2S(WIRED);
 239         DF2S(SME);
 240         DF2S(AP);
 241         DF2S(SET_KEYS_AFTER_ASSOC_DONE);
 242         DF2S(HT_2040_COEX);
 243         DF2S(P2P_CONCURRENT);
 244         DF2S(P2P_DEDICATED_INTERFACE);
 245         DF2S(P2P_CAPABLE);
 246         DF2S(AP_TEARDOWN_SUPPORT);
 247         DF2S(P2P_MGMT_AND_NON_P2P);
 248         DF2S(SANE_ERROR_CODES);
 249         DF2S(OFFCHANNEL_TX);
 250         DF2S(EAPOL_TX_STATUS);
 251         DF2S(DEAUTH_TX_STATUS);
 252         DF2S(BSS_SELECTION);
 253         DF2S(TDLS_SUPPORT);
 254         DF2S(TDLS_EXTERNAL_SETUP);
 255         DF2S(PROBE_RESP_OFFLOAD);
 256         DF2S(AP_UAPSD);
 257         DF2S(INACTIVITY_TIMER);
 258         DF2S(AP_MLME);
 259         DF2S(SAE);
 260         DF2S(OBSS_SCAN);
 261         DF2S(IBSS);
 262         DF2S(RADAR);
 263         DF2S(DEDICATED_P2P_DEVICE);
 264         DF2S(QOS_MAPPING);
 265         DF2S(AP_CSA);
 266         DF2S(MESH);
 267         DF2S(ACS_OFFLOAD);
 268         DF2S(KEY_MGMT_OFFLOAD);
 269         DF2S(TDLS_CHANNEL_SWITCH);
 270         DF2S(HT_IBSS);
 271         DF2S(VHT_IBSS);
 272         DF2S(SUPPORT_HW_MODE_ANY);
 273         DF2S(OFFCHANNEL_SIMULTANEOUS);
 274         DF2S(FULL_AP_CLIENT_STATE);
 275         DF2S(P2P_LISTEN_OFFLOAD);
 276         }
 277         return "UNKNOWN";
 278 #undef DF2S
 279 }