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 "wpa_supplicant_i.h"
  18 #include "driver_i.h"
  19 #include "config.h"
  20 #include "bss.h"
  21 #include "gas_query.h"
  22 #include "interworking.h"
  23 #include "hs20_supplicant.h"
  24
  25
  26 void wpas_hs20_add_indication(struct wpabuf *buf, int pps_mo_id)
  27 {
  28         u8 conf;
  29
  30         wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC);
  31         wpabuf_put_u8(buf, pps_mo_id >= 0 ? 7 : 5);
  32         wpabuf_put_be24(buf, OUI_WFA);
  33         wpabuf_put_u8(buf, HS20_INDICATION_OUI_TYPE);
  34         conf = HS20_VERSION;
  35         if (pps_mo_id >= 0)
  36                 conf |= HS20_PPS_MO_ID_PRESENT;
  37         wpabuf_put_u8(buf, conf);
  38         if (pps_mo_id >= 0)
  39                 wpabuf_put_le16(buf, pps_mo_id);
  40 }
  41
  42
  43 int is_hs20_network(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid,
  44                     struct wpa_bss *bss)
  45 {
  46         if (!wpa_s->conf->hs20 || !ssid)
  47                 return 0;
  48
  49         if (ssid->parent_cred)
  50                 return 1;
  51
  52         if (bss && !wpa_bss_get_vendor_ie(bss, HS20_IE_VENDOR_TYPE))
  53                 return 0;
  54
  55         /*
  56          * This may catch some non-Hotspot 2.0 cases, but it is safer to do that
  57          * than cause Hotspot 2.0 connections without indication element getting
  58          * added. Non-Hotspot 2.0 APs should ignore the unknown vendor element.
  59          */
  60
  61         if (!(ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X))
  62                 return 0;
  63         if (!(ssid->pairwise_cipher & WPA_CIPHER_CCMP))
  64                 return 0;
  65         if (ssid->proto != WPA_PROTO_RSN)
  66                 return 0;
  67
  68         return 1;
  69 }
  70
  71
  72 int hs20_get_pps_mo_id(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid)
  73 {
  74         struct wpa_cred *cred;
  75
  76         if (ssid == NULL || ssid->parent_cred == NULL)
  77                 return 0;
  78
  79         for (cred = wpa_s->conf->cred; cred; cred = cred->next) {
  80                 if (ssid->parent_cred == cred)
  81                         return cred->update_identifier;
  82         }
  83
  84         return 0;
  85 }
  86
  87
  88 struct wpabuf * hs20_build_anqp_req(u32 stypes, const u8 *payload,
  89                                     size_t payload_len)
  90 {
  91         struct wpabuf *buf;
  92         u8 *len_pos;
  93
  94         buf = gas_anqp_build_initial_req(0, 100 + payload_len);
  95         if (buf == NULL)
  96                 return NULL;
  97
  98         len_pos = gas_anqp_add_element(buf, ANQP_VENDOR_SPECIFIC);
  99         wpabuf_put_be24(buf, OUI_WFA);
 100         wpabuf_put_u8(buf, HS20_ANQP_OUI_TYPE);
 101         if (stypes == BIT(HS20_STYPE_NAI_HOME_REALM_QUERY)) {
 102                 wpabuf_put_u8(buf, HS20_STYPE_NAI_HOME_REALM_QUERY);
 103                 wpabuf_put_u8(buf, 0); /* Reserved */
 104                 if (payload)
 105                         wpabuf_put_data(buf, payload, payload_len);
 106         } else {
 107                 u8 i;
 108                 wpabuf_put_u8(buf, HS20_STYPE_QUERY_LIST);
 109                 wpabuf_put_u8(buf, 0); /* Reserved */
 110                 for (i = 0; i < 32; i++) {
 111                         if (stypes & BIT(i))
 112                                 wpabuf_put_u8(buf, i);
 113                 }
 114         }
 115         gas_anqp_set_element_len(buf, len_pos);
 116
 117         gas_anqp_set_len(buf);
 118
 119         return buf;
 120 }
 121
 122
 123 int hs20_anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst, u32 stypes,
 124                        const u8 *payload, size_t payload_len)
 125 {
 126         struct wpabuf *buf;
 127         int ret = 0;
 128         int freq;
 129         struct wpa_bss *bss;
 130         int res;
 131
 132         freq = wpa_s->assoc_freq;
 133         bss = wpa_bss_get_bssid(wpa_s, dst);
 134         if (bss) {
 135                 wpa_bss_anqp_unshare_alloc(bss);
 136                 freq = bss->freq;
 137         }
 138         if (freq <= 0)
 139                 return -1;
 140
 141         wpa_printf(MSG_DEBUG, "HS20: ANQP Query Request to " MACSTR " for "
 142                    "subtypes 0x%x", MAC2STR(dst), stypes);
 143
 144         buf = hs20_build_anqp_req(stypes, payload, payload_len);
 145         if (buf == NULL)
 146                 return -1;
 147
 148         res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s);
 149         if (res < 0) {
 150                 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
 151                 wpabuf_free(buf);
 152                 ret = -1;
 153         } else
 154                 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
 155                            "%u", res);
 156
 157         return ret;
 158 }
 159
 160
 161 void hs20_parse_rx_hs20_anqp_resp(struct wpa_supplicant *wpa_s,
 162                                   const u8 *sa, const u8 *data, size_t slen)
 163 {
 164         const u8 *pos = data;
 165         u8 subtype;
 166         struct wpa_bss *bss = wpa_bss_get_bssid(wpa_s, sa);
 167         struct wpa_bss_anqp *anqp = NULL;
 168
 169         if (slen < 2)
 170                 return;
 171
 172         if (bss)
 173                 anqp = bss->anqp;
 174
 175         subtype = *pos++;
 176         slen--;
 177
 178         pos++; /* Reserved */
 179         slen--;
 180
 181         switch (subtype) {
 182         case HS20_STYPE_CAPABILITY_LIST:
 183                 wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
 184                         " HS Capability List", MAC2STR(sa));
 185                 wpa_hexdump_ascii(MSG_DEBUG, "HS Capability List", pos, slen);
 186                 break;
 187         case HS20_STYPE_OPERATOR_FRIENDLY_NAME:
 188                 wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
 189                         " Operator Friendly Name", MAC2STR(sa));
 190                 wpa_hexdump_ascii(MSG_DEBUG, "oper friendly name", pos, slen);
 191                 if (anqp) {
 192                         wpabuf_free(anqp->hs20_operator_friendly_name);
 193                         anqp->hs20_operator_friendly_name =
 194                                 wpabuf_alloc_copy(pos, slen);
 195                 }
 196                 break;
 197         case HS20_STYPE_WAN_METRICS:
 198                 wpa_hexdump(MSG_DEBUG, "WAN Metrics", pos, slen);
 199                 if (slen < 13) {
 200                         wpa_dbg(wpa_s, MSG_DEBUG, "HS 2.0: Too short WAN "
 201                                 "Metrics value from " MACSTR, MAC2STR(sa));
 202                         break;
 203                 }
 204                 wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
 205                         " WAN Metrics %02x:%u:%u:%u:%u:%u", MAC2STR(sa),
 206                         pos[0], WPA_GET_LE32(pos + 1), WPA_GET_LE32(pos + 5),
 207                         pos[9], pos[10], WPA_GET_LE16(pos + 11));
 208                 if (anqp) {
 209                         wpabuf_free(anqp->hs20_wan_metrics);
 210                         anqp->hs20_wan_metrics = wpabuf_alloc_copy(pos, slen);
 211                 }
 212                 break;
 213         case HS20_STYPE_CONNECTION_CAPABILITY:
 214                 wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
 215                         " Connection Capability", MAC2STR(sa));
 216                 wpa_hexdump_ascii(MSG_DEBUG, "conn capability", pos, slen);
 217                 if (anqp) {
 218                         wpabuf_free(anqp->hs20_connection_capability);
 219                         anqp->hs20_connection_capability =
 220                                 wpabuf_alloc_copy(pos, slen);
 221                 }
 222                 break;
 223         case HS20_STYPE_OPERATING_CLASS:
 224                 wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
 225                         " Operating Class", MAC2STR(sa));
 226                 wpa_hexdump_ascii(MSG_DEBUG, "Operating Class", pos, slen);
 227                 if (anqp) {
 228                         wpabuf_free(anqp->hs20_operating_class);
 229                         anqp->hs20_operating_class =
 230                                 wpabuf_alloc_copy(pos, slen);
 231                 }
 232                 break;
 233         default:
 234                 wpa_printf(MSG_DEBUG, "HS20: Unsupported subtype %u", subtype);
 235                 break;
 236         }
 237 }
 238
 239
 240 void hs20_rx_subscription_remediation(struct wpa_supplicant *wpa_s,
 241                                       const char *url, u8 osu_method)
 242 {
 243         if (url)
 244                 wpa_msg(wpa_s, MSG_INFO, HS20_SUBSCRIPTION_REMEDIATION "%u %s",
 245                         osu_method, url);
 246         else
 247                 wpa_msg(wpa_s, MSG_INFO, HS20_SUBSCRIPTION_REMEDIATION);
 248 }