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)
  27 {
  28         wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC);
  29         wpabuf_put_u8(buf, 5);
  30         wpabuf_put_be24(buf, OUI_WFA);
  31         wpabuf_put_u8(buf, HS20_INDICATION_OUI_TYPE);
  32         wpabuf_put_u8(buf, 0x00); /* Hotspot Configuration */
  33 }
  34
  35
  36 int is_hs20_network(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid,
  37                     struct wpa_bss *bss)
  38 {
  39         if (!wpa_s->conf->hs20 || !ssid)
  40                 return 0;
  41
  42         if (ssid->parent_cred)
  43                 return 1;
  44
  45         if (bss && !wpa_bss_get_vendor_ie(bss, HS20_IE_VENDOR_TYPE))
  46                 return 0;
  47
  48         /*
  49          * This may catch some non-Hotspot 2.0 cases, but it is safer to do that
  50          * than cause Hotspot 2.0 connections without indication element getting
  51          * added. Non-Hotspot 2.0 APs should ignore the unknown vendor element.
  52          */
  53
  54         if (!(ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X))
  55                 return 0;
  56         if (!(ssid->pairwise_cipher & WPA_CIPHER_CCMP))
  57                 return 0;
  58         if (ssid->proto != WPA_PROTO_RSN)
  59                 return 0;
  60
  61         return 1;
  62 }
  63
  64
  65 struct wpabuf * hs20_build_anqp_req(u32 stypes, const u8 *payload,
  66                                     size_t payload_len)
  67 {
  68         struct wpabuf *buf;
  69         u8 *len_pos;
  70
  71         buf = gas_anqp_build_initial_req(0, 100 + payload_len);
  72         if (buf == NULL)
  73                 return NULL;
  74
  75         len_pos = gas_anqp_add_element(buf, ANQP_VENDOR_SPECIFIC);
  76         wpabuf_put_be24(buf, OUI_WFA);
  77         wpabuf_put_u8(buf, HS20_ANQP_OUI_TYPE);
  78         if (stypes == BIT(HS20_STYPE_NAI_HOME_REALM_QUERY)) {
  79                 wpabuf_put_u8(buf, HS20_STYPE_NAI_HOME_REALM_QUERY);
  80                 wpabuf_put_u8(buf, 0); /* Reserved */
  81                 if (payload)
  82                         wpabuf_put_data(buf, payload, payload_len);
  83         } else {
  84                 u8 i;
  85                 wpabuf_put_u8(buf, HS20_STYPE_QUERY_LIST);
  86                 wpabuf_put_u8(buf, 0); /* Reserved */
  87                 for (i = 0; i < 32; i++) {
  88                         if (stypes & BIT(i))
  89                                 wpabuf_put_u8(buf, i);
  90                 }
  91         }
  92         gas_anqp_set_element_len(buf, len_pos);
  93
  94         gas_anqp_set_len(buf);
  95
  96         return buf;
  97 }
  98
  99
 100 int hs20_anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst, u32 stypes,
 101                        const u8 *payload, size_t payload_len)
 102 {
 103         struct wpabuf *buf;
 104         int ret = 0;
 105         int freq;
 106         struct wpa_bss *bss;
 107         int res;
 108
 109         freq = wpa_s->assoc_freq;
 110         bss = wpa_bss_get_bssid(wpa_s, dst);
 111         if (bss) {
 112                 wpa_bss_anqp_unshare_alloc(bss);
 113                 freq = bss->freq;
 114         }
 115         if (freq <= 0)
 116                 return -1;
 117
 118         wpa_printf(MSG_DEBUG, "HS20: ANQP Query Request to " MACSTR " for "
 119                    "subtypes 0x%x", MAC2STR(dst), stypes);
 120
 121         buf = hs20_build_anqp_req(stypes, payload, payload_len);
 122         if (buf == NULL)
 123                 return -1;
 124
 125         res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s);
 126         if (res < 0) {
 127                 wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
 128                 ret = -1;
 129         } else
 130                 wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
 131                            "%u", res);
 132
 133         wpabuf_free(buf);
 134         return ret;
 135 }
 136
 137
 138 void hs20_parse_rx_hs20_anqp_resp(struct wpa_supplicant *wpa_s,
 139                                   const u8 *sa, const u8 *data, size_t slen)
 140 {
 141         const u8 *pos = data;
 142         u8 subtype;
 143         struct wpa_bss *bss = wpa_bss_get_bssid(wpa_s, sa);
 144         struct wpa_bss_anqp *anqp = NULL;
 145
 146         if (slen < 2)
 147                 return;
 148
 149         if (bss)
 150                 anqp = bss->anqp;
 151
 152         subtype = *pos++;
 153         slen--;
 154
 155         pos++; /* Reserved */
 156         slen--;
 157
 158         switch (subtype) {
 159         case HS20_STYPE_CAPABILITY_LIST:
 160                 wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
 161                         " HS Capability List", MAC2STR(sa));
 162                 wpa_hexdump_ascii(MSG_DEBUG, "HS Capability List", pos, slen);
 163                 break;
 164         case HS20_STYPE_OPERATOR_FRIENDLY_NAME:
 165                 wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
 166                         " Operator Friendly Name", MAC2STR(sa));
 167                 wpa_hexdump_ascii(MSG_DEBUG, "oper friendly name", pos, slen);
 168                 if (anqp) {
 169                         wpabuf_free(anqp->hs20_operator_friendly_name);
 170                         anqp->hs20_operator_friendly_name =
 171                                 wpabuf_alloc_copy(pos, slen);
 172                 }
 173                 break;
 174         case HS20_STYPE_WAN_METRICS:
 175                 wpa_hexdump(MSG_DEBUG, "WAN Metrics", pos, slen);
 176                 if (slen < 13) {
 177                         wpa_dbg(wpa_s, MSG_DEBUG, "HS 2.0: Too short WAN "
 178                                 "Metrics value from " MACSTR, MAC2STR(sa));
 179                         break;
 180                 }
 181                 wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
 182                         " WAN Metrics %02x:%u:%u:%u:%u:%u", MAC2STR(sa),
 183                         pos[0], WPA_GET_LE32(pos + 1), WPA_GET_LE32(pos + 5),
 184                         pos[9], pos[10], WPA_GET_LE16(pos + 11));
 185                 if (anqp) {
 186                         wpabuf_free(anqp->hs20_wan_metrics);
 187                         anqp->hs20_wan_metrics = wpabuf_alloc_copy(pos, slen);
 188                 }
 189                 break;
 190         case HS20_STYPE_CONNECTION_CAPABILITY:
 191                 wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
 192                         " Connection Capability", MAC2STR(sa));
 193                 wpa_hexdump_ascii(MSG_DEBUG, "conn capability", pos, slen);
 194                 if (anqp) {
 195                         wpabuf_free(anqp->hs20_connection_capability);
 196                         anqp->hs20_connection_capability =
 197                                 wpabuf_alloc_copy(pos, slen);
 198                 }
 199                 break;
 200         case HS20_STYPE_OPERATING_CLASS:
 201                 wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
 202                         " Operating Class", MAC2STR(sa));
 203                 wpa_hexdump_ascii(MSG_DEBUG, "Operating Class", pos, slen);
 204                 if (anqp) {
 205                         wpabuf_free(anqp->hs20_operating_class);
 206                         anqp->hs20_operating_class =
 207                                 wpabuf_alloc_copy(pos, slen);
 208                 }
 209                 break;
 210         default:
 211                 wpa_printf(MSG_DEBUG, "HS20: Unsupported subtype %u", subtype);
 212                 break;
 213         }
 214 }