hostap/wpa_supplicant/hs20_supplicant.c
Kyeyoon Park 24c694b465 GAS: Delay GAS query Tx while another query is in progress
It would be possible to issue another GAS query when a previous one is
still in progress and this could result in conflicting offchannel
operations. Prevent that by delaying GAS query initiation until the
previous operation has been completed.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2013-10-21 13:13:42 +03:00

214 lines
5.3 KiB
C

/*
* Copyright (c) 2009, Atheros Communications, Inc.
* Copyright (c) 2011-2012, Qualcomm Atheros, Inc.
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#include "includes.h"
#include "common.h"
#include "eloop.h"
#include "common/ieee802_11_common.h"
#include "common/ieee802_11_defs.h"
#include "common/gas.h"
#include "common/wpa_ctrl.h"
#include "wpa_supplicant_i.h"
#include "driver_i.h"
#include "config.h"
#include "bss.h"
#include "gas_query.h"
#include "interworking.h"
#include "hs20_supplicant.h"
void wpas_hs20_add_indication(struct wpabuf *buf)
{
wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC);
wpabuf_put_u8(buf, 5);
wpabuf_put_be24(buf, OUI_WFA);
wpabuf_put_u8(buf, HS20_INDICATION_OUI_TYPE);
wpabuf_put_u8(buf, 0x00); /* Hotspot Configuration */
}
int is_hs20_network(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid,
struct wpa_bss *bss)
{
if (!wpa_s->conf->hs20 || !ssid)
return 0;
if (ssid->parent_cred)
return 1;
if (bss && !wpa_bss_get_vendor_ie(bss, HS20_IE_VENDOR_TYPE))
return 0;
/*
* This may catch some non-Hotspot 2.0 cases, but it is safer to do that
* than cause Hotspot 2.0 connections without indication element getting
* added. Non-Hotspot 2.0 APs should ignore the unknown vendor element.
*/
if (!(ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X))
return 0;
if (!(ssid->pairwise_cipher & WPA_CIPHER_CCMP))
return 0;
if (ssid->proto != WPA_PROTO_RSN)
return 0;
return 1;
}
struct wpabuf * hs20_build_anqp_req(u32 stypes, const u8 *payload,
size_t payload_len)
{
struct wpabuf *buf;
u8 *len_pos;
buf = gas_anqp_build_initial_req(0, 100 + payload_len);
if (buf == NULL)
return NULL;
len_pos = gas_anqp_add_element(buf, ANQP_VENDOR_SPECIFIC);
wpabuf_put_be24(buf, OUI_WFA);
wpabuf_put_u8(buf, HS20_ANQP_OUI_TYPE);
if (stypes == BIT(HS20_STYPE_NAI_HOME_REALM_QUERY)) {
wpabuf_put_u8(buf, HS20_STYPE_NAI_HOME_REALM_QUERY);
wpabuf_put_u8(buf, 0); /* Reserved */
if (payload)
wpabuf_put_data(buf, payload, payload_len);
} else {
u8 i;
wpabuf_put_u8(buf, HS20_STYPE_QUERY_LIST);
wpabuf_put_u8(buf, 0); /* Reserved */
for (i = 0; i < 32; i++) {
if (stypes & BIT(i))
wpabuf_put_u8(buf, i);
}
}
gas_anqp_set_element_len(buf, len_pos);
gas_anqp_set_len(buf);
return buf;
}
int hs20_anqp_send_req(struct wpa_supplicant *wpa_s, const u8 *dst, u32 stypes,
const u8 *payload, size_t payload_len)
{
struct wpabuf *buf;
int ret = 0;
int freq;
struct wpa_bss *bss;
int res;
freq = wpa_s->assoc_freq;
bss = wpa_bss_get_bssid(wpa_s, dst);
if (bss) {
wpa_bss_anqp_unshare_alloc(bss);
freq = bss->freq;
}
if (freq <= 0)
return -1;
wpa_printf(MSG_DEBUG, "HS20: ANQP Query Request to " MACSTR " for "
"subtypes 0x%x", MAC2STR(dst), stypes);
buf = hs20_build_anqp_req(stypes, payload, payload_len);
if (buf == NULL)
return -1;
res = gas_query_req(wpa_s->gas, dst, freq, buf, anqp_resp_cb, wpa_s);
if (res < 0) {
wpa_printf(MSG_DEBUG, "ANQP: Failed to send Query Request");
wpabuf_free(buf);
ret = -1;
} else
wpa_printf(MSG_DEBUG, "ANQP: Query started with dialog token "
"%u", res);
return ret;
}
void hs20_parse_rx_hs20_anqp_resp(struct wpa_supplicant *wpa_s,
const u8 *sa, const u8 *data, size_t slen)
{
const u8 *pos = data;
u8 subtype;
struct wpa_bss *bss = wpa_bss_get_bssid(wpa_s, sa);
struct wpa_bss_anqp *anqp = NULL;
if (slen < 2)
return;
if (bss)
anqp = bss->anqp;
subtype = *pos++;
slen--;
pos++; /* Reserved */
slen--;
switch (subtype) {
case HS20_STYPE_CAPABILITY_LIST:
wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
" HS Capability List", MAC2STR(sa));
wpa_hexdump_ascii(MSG_DEBUG, "HS Capability List", pos, slen);
break;
case HS20_STYPE_OPERATOR_FRIENDLY_NAME:
wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
" Operator Friendly Name", MAC2STR(sa));
wpa_hexdump_ascii(MSG_DEBUG, "oper friendly name", pos, slen);
if (anqp) {
wpabuf_free(anqp->hs20_operator_friendly_name);
anqp->hs20_operator_friendly_name =
wpabuf_alloc_copy(pos, slen);
}
break;
case HS20_STYPE_WAN_METRICS:
wpa_hexdump(MSG_DEBUG, "WAN Metrics", pos, slen);
if (slen < 13) {
wpa_dbg(wpa_s, MSG_DEBUG, "HS 2.0: Too short WAN "
"Metrics value from " MACSTR, MAC2STR(sa));
break;
}
wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
" WAN Metrics %02x:%u:%u:%u:%u:%u", MAC2STR(sa),
pos[0], WPA_GET_LE32(pos + 1), WPA_GET_LE32(pos + 5),
pos[9], pos[10], WPA_GET_LE16(pos + 11));
if (anqp) {
wpabuf_free(anqp->hs20_wan_metrics);
anqp->hs20_wan_metrics = wpabuf_alloc_copy(pos, slen);
}
break;
case HS20_STYPE_CONNECTION_CAPABILITY:
wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
" Connection Capability", MAC2STR(sa));
wpa_hexdump_ascii(MSG_DEBUG, "conn capability", pos, slen);
if (anqp) {
wpabuf_free(anqp->hs20_connection_capability);
anqp->hs20_connection_capability =
wpabuf_alloc_copy(pos, slen);
}
break;
case HS20_STYPE_OPERATING_CLASS:
wpa_msg(wpa_s, MSG_INFO, "RX-HS20-ANQP " MACSTR
" Operating Class", MAC2STR(sa));
wpa_hexdump_ascii(MSG_DEBUG, "Operating Class", pos, slen);
if (anqp) {
wpabuf_free(anqp->hs20_operating_class);
anqp->hs20_operating_class =
wpabuf_alloc_copy(pos, slen);
}
break;
default:
wpa_printf(MSG_DEBUG, "HS20: Unsupported subtype %u", subtype);
break;
}
}