wpa_supplicant/hs20_supplicant.c

   1 /*
   2  * Copyright (c) 2009, Atheros Communications, Inc.
   3  * Copyright (c) 2011-2012, Qualcomm Atheros, Inc.
   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
  11 #include "common.h"
  12 #include "eloop.h"
  13 #include "common/ieee802_11_common.h"
  14 #include "common/ieee802_11_defs.h"
  15 #include "common/gas.h"
  16 #include "common/wpa_ctrl.h"
  17 #include "rsn_supp/wpa.h"
  18 #include "wpa_supplicant_i.h"
  19 #include "driver_i.h"
  20 #include "config.h"
  21 #include "bss.h"
  22 #include "blacklist.h"
  23 #include "gas_query.h"
  24 #include "interworking.h"
  25 #include "hs20_supplicant.h"
  26
  27
  28 void wpas_hs20_add_indication(struct wpabuf *buf, int pps_mo_id)
  29 {
  30         u8 conf;
  31
  32         wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC);
  33         wpabuf_put_u8(buf, pps_mo_id >= 0 ? 7 : 5);
  34         wpabuf_put_be24(buf, OUI_WFA);
  35         wpabuf_put_u8(buf, HS20_INDICATION_OUI_TYPE);
  36         conf = HS20_VERSION;
  37         if (pps_mo_id >= 0)
  38                 conf |= HS20_PPS_MO_ID_PRESENT;
  39         wpabuf_put_u8(buf, conf);
  40         if (pps_mo_id >= 0)
  41                 wpabuf_put_le16(buf, pps_mo_id);
  42 }
  43
  44
  45 int is_hs20_network(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid,
  46                     struct wpa_bss *bss)
  47 {
  48         if (!wpa_s->conf->hs20 || !ssid)
  49                 return 0;
  50
  51         if (ssid->parent_cred)
  52                 return 1;
  53
  54         if (bss && !wpa_bss_get_vendor_ie(bss, HS20_IE_VENDOR_TYPE))
  55                 return 0;
  56
  57         /*
  58          * This may catch some non-Hotspot 2.0 cases, but it is safer to do that
  59          * than cause Hotspot 2.0 connections without indication element getting
  60          * added. Non-Hotspot 2.0 APs should ignore the unknown vendor element.
  61          */
  62
  63         if (!(ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X))
  64                 return 0;
  65         if (!(ssid->pairwise_cipher & WPA_CIPHER_CCMP))
  66                 return 0;
  67         if (ssid->proto != WPA_PROTO_RSN)
  68                 return 0;
  69
  70         return 1;
  71 }
  72
  73
  74 int hs20_get_pps_mo_id(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid)
  75 {
  76         struct wpa_cred *cred;
  77
  78         if (ssid == NULL || ssid->parent_cred == NULL)
  79                 return 0;
  80
  81         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
  82                 if (ssid->parent_cred == cred)
  83                         return cred->update_identifier;
  84         }
  85
  86         return 0;
  87 }
  88
  89
  90 struct wpabuf * hs20_build_anqp_req(u32 stypes, const u8 *payload,
  91                                     size_t payload_len)
  92 {
  93         struct wpabuf *buf;
  94         u8 *len_pos;
  95
  96         buf = gas_anqp_build_initial_req(0, 100 + payload_len);
  97         if (buf == NULL)
  98                 return NULL;
  99
 100         len_pos = gas_anqp_add_element(buf, ANQP_VENDOR_SPECIFIC);
 101         wpabuf_put_be24(buf, OUI_WFA);
 102         wpabuf_put_u8(buf, HS20_ANQP_OUI_TYPE);
 103         if (stypes == BIT(HS20_STYPE_NAI_HOME_REALM_QUERY)) {
 104                 wpabuf_put_u8(buf, HS20_STYPE_NAI_HOME_REALM_QUERY);
 105                 wpabuf_put_u8(buf, 0); /* Reserved */
 106                 if (payload)
 107                         wpabuf_put_data(buf, payload, payload_len);
 108         } else {
 109                 u8 i;
 110                 wpabuf_put_u8(buf, HS20_STYPE_QUERY_LIST);
 111                 wpabuf_put_u8(buf, 0); /* Reserved */
 112                 for (i = 0; i < 32; i++) {
 113                         if (stypes & BIT(i))
 114                                 wpabuf_put_u8(buf, i);
 115                 }
 116         }
 117         gas_anqp_set_element_len(buf, len_pos);
 118
 119         gas_anqp_set_len(buf);
 120
 121         return buf;
 122 }
 123
 124
 125 int hs20_anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst, u32 stypes,
 126                        const u8 *payload, size_t payload_len)
 127 {
 128         struct wpabuf *buf;
 129         int ret = 0;
 130         int freq;
 131         struct wpa_bss *bss;
 132         int res;
 133
 134         freq = wpa_s->assoc_freq;
 135         bss = wpa_bss_get_bssid(wpa_s, dst);
 136         if (bss) {
 137                 wpa_bss_anqp_unshare_alloc(bss);
 138                 freq = bss->freq;
 139         }
 140         if (freq <= 0)
 141                 return -1;
 142
 143         wpa_printf(MSG_DEBUG, "HS20: ANQP Query Request to " MACSTR " for "
 144                    "subtypes 0x%x", MAC2STR(dst), stypes);
 145
 146         buf = hs20_build_anqp_req(stypes, payload, payload_len);
 147         if (buf == NULL)
 148                 return -1;
 149
 150         res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s);
 151         if (res < 0) {
 152                 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
 153                 wpabuf_free(buf);
 154                 ret = -1;
 155         } else
 156                 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
 157                            "%u", res);
 158
 159         return ret;
 160 }
 161
 162
 163 void hs20_parse_rx_hs20_anqp_resp(struct wpa_supplicant *wpa_s,
 164                                   const u8 *sa, const u8 *data, size_t slen)
 165 {
 166         const u8 *pos = data;
 167         u8 subtype;
 168         struct wpa_bss *bss = wpa_bss_get_bssid(wpa_s, sa);
 169         struct wpa_bss_anqp *anqp = NULL;
 170
 171         if (slen < 2)
 172                 return;
 173
 174         if (bss)
 175                 anqp = bss->anqp;
 176
 177         subtype = *pos++;
 178         slen--;
 179
 180         pos++; /* Reserved */
 181         slen--;
 182
 183         switch (subtype) {
 184         case HS20_STYPE_CAPABILITY_LIST:
 185                 wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
 186                         " HS Capability List", MAC2STR(sa));
 187                 wpa_hexdump_ascii(MSG_DEBUG, "HS Capability List", pos, slen);
 188                 break;
 189         case HS20_STYPE_OPERATOR_FRIENDLY_NAME:
 190                 wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
 191                         " Operator Friendly Name", MAC2STR(sa));
 192                 wpa_hexdump_ascii(MSG_DEBUG, "oper friendly name", pos, slen);
 193                 if (anqp) {
 194                         wpabuf_free(anqp->hs20_operator_friendly_name);
 195                         anqp->hs20_operator_friendly_name =
 196                                 wpabuf_alloc_copy(pos, slen);
 197                 }
 198                 break;
 199         case HS20_STYPE_WAN_METRICS:
 200                 wpa_hexdump(MSG_DEBUG, "WAN Metrics", pos, slen);
 201                 if (slen < 13) {
 202                         wpa_dbg(wpa_s, MSG_DEBUG, "HS 2.0: Too short WAN "
 203                                 "Metrics value from " MACSTR, MAC2STR(sa));
 204                         break;
 205                 }
 206                 wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
 207                         " WAN Metrics %02x:%u:%u:%u:%u:%u", MAC2STR(sa),
 208                         pos[0], WPA_GET_LE32(pos + 1), WPA_GET_LE32(pos + 5),
 209                         pos[9], pos[10], WPA_GET_LE16(pos + 11));
 210                 if (anqp) {
 211                         wpabuf_free(anqp->hs20_wan_metrics);
 212                         anqp->hs20_wan_metrics = wpabuf_alloc_copy(pos, slen);
 213                 }
 214                 break;
 215         case HS20_STYPE_CONNECTION_CAPABILITY:
 216                 wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
 217                         " Connection Capability", MAC2STR(sa));
 218                 wpa_hexdump_ascii(MSG_DEBUG, "conn capability", pos, slen);
 219                 if (anqp) {
 220                         wpabuf_free(anqp->hs20_connection_capability);
 221                         anqp->hs20_connection_capability =
 222                                 wpabuf_alloc_copy(pos, slen);
 223                 }
 224                 break;
 225         case HS20_STYPE_OPERATING_CLASS:
 226                 wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
 227                         " Operating Class", MAC2STR(sa));
 228                 wpa_hexdump_ascii(MSG_DEBUG, "Operating Class", pos, slen);
 229                 if (anqp) {
 230                         wpabuf_free(anqp->hs20_operating_class);
 231                         anqp->hs20_operating_class =
 232                                 wpabuf_alloc_copy(pos, slen);
 233                 }
 234                 break;
 235         default:
 236                 wpa_printf(MSG_DEBUG, "HS20: Unsupported subtype %u", subtype);
 237                 break;
 238         }
 239 }
 240
 241
 242 void hs20_rx_subscription_remediation(struct wpa_supplicant *wpa_s,
 243                                       const char *url, u8 osu_method)
 244 {
 245         if (url)
 246                 wpa_msg(wpa_s, MSG_INFO, HS20_SUBSCRIPTION_REMEDIATION "%u %s",
 247                         osu_method, url);
 248         else
 249                 wpa_msg(wpa_s, MSG_INFO, HS20_SUBSCRIPTION_REMEDIATION);
 250 }
 251
 252
 253 void hs20_rx_deauth_imminent_notice(struct wpa_supplicant *wpa_s, u8 code,
 254                                     u16 reauth_delay, const char *url)
 255 {
 256         if (!wpa_sm_pmf_enabled(wpa_s->wpa)) {
 257                 wpa_printf(MSG_DEBUG, "HS 2.0: Ignore deauthentication imminent notice since PMF was not enabled");
 258                 return;
 259         }
 260
 261         wpa_msg(wpa_s, MSG_INFO, HS20_DEAUTH_IMMINENT_NOTICE "%u %u %s",
 262                 code, reauth_delay, url);
 263
 264         if (code == HS20_DEAUTH_REASON_CODE_BSS) {
 265                 wpa_printf(MSG_DEBUG, "HS 2.0: Add BSS to blacklist");
 266                 wpa_blacklist_add(wpa_s, wpa_s->bssid);
 267         }
 268
 269         if (code == HS20_DEAUTH_REASON_CODE_ESS && wpa_s->current_ssid) {
 270                 struct os_time now;
 271                 os_get_time(&now);
 272                 if (now.sec + reauth_delay <=
 273                     wpa_s->current_ssid->disabled_until.sec)
 274                         return;
 275                 wpa_printf(MSG_DEBUG, "HS 2.0: Disable network for %u seconds",
 276                            reauth_delay);
 277                 wpa_s->current_ssid->disabled_until.sec =
 278                         now.sec + reauth_delay;
 279         }
 280 }