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DPP: Integration for hostapd

Browse Source 
This adds DPP bootstrapping, authentication, and configuration into
hostapd similarly to how the design was integrated in wpa_supplicant.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
This commit is contained in:
Jouni Malinen 2017-06-15 22:16:45 +03:00 committed by Jouni Malinen
parent 9beb2892de
commit 9c2b8204e6
14 changed files with 1863 additions and 2 deletions
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20
hostapd/Android.mk
View File

@ -532,6 +532,22 @@ endif
endif
ifdef CONFIG_DPP
L_CFLAGS += -DCONFIG_DPP
OBJS += src/common/dpp.c
OBJS += src/ap/dpp_hostapd.c
OBJS += src/ap/gas_query_ap.c
NEED_AES_SIV=y
NEED_HMAC_SHA256_KDF=y
NEED_HMAC_SHA384_KDF=y
NEED_HMAC_SHA512_KDF=y
NEED_SHA256=y
NEED_SHA384=y
NEED_SHA512=y
NEED_JSON=y
NEED_GAS=y
endif
ifdef CONFIG_EAP_IKEV2
L_CFLAGS += -DEAP_SERVER_IKEV2
OBJS += src/eap_server/eap_server_ikev2.c src/eap_server/ikev2.c
@ -979,6 +995,10 @@ endif
ifdef CONFIG_INTERWORKING
L_CFLAGS += -DCONFIG_INTERWORKING
NEED_GAS=y
endif
ifdef NEED_GAS
OBJS += src/common/gas.c
OBJS += src/ap/gas_serv.c
endif

20
hostapd/Makefile
View File

@ -566,6 +566,22 @@ endif
endif
ifdef CONFIG_DPP
CFLAGS += -DCONFIG_DPP
OBJS += ../src/common/dpp.o
OBJS += ../src/ap/dpp_hostapd.o
OBJS += ../src/ap/gas_query_ap.o
NEED_AES_SIV=y
NEED_HMAC_SHA256_KDF=y
NEED_HMAC_SHA384_KDF=y
NEED_HMAC_SHA512_KDF=y
NEED_SHA256=y
NEED_SHA384=y
NEED_SHA512=y
NEED_JSON=y
NEED_GAS=y
endif
ifdef CONFIG_EAP_IKEV2
CFLAGS += -DEAP_SERVER_IKEV2
OBJS += ../src/eap_server/eap_server_ikev2.o ../src/eap_server/ikev2.o
@ -1069,6 +1085,10 @@ endif
ifdef CONFIG_INTERWORKING
CFLAGS += -DCONFIG_INTERWORKING
NEED_GAS=y
endif
ifdef NEED_GAS
OBJS += ../src/common/gas.o
OBJS += ../src/ap/gas_serv.o
endif

55
hostapd/ctrl_iface.c
View File

@ -50,6 +50,7 @@
#include "ap/beacon.h"
#include "ap/neighbor_db.h"
#include "ap/rrm.h"
#include "ap/dpp_hostapd.h"
#include "wps/wps_defs.h"
#include "wps/wps.h"
#include "fst/fst_ctrl_iface.h"
@ -1278,6 +1279,23 @@ static int hostapd_ctrl_iface_set(struct hostapd_data *hapd, char *cmd)
hapd->ext_mgmt_frame_handling = atoi(value);
} else if (os_strcasecmp(cmd, "ext_eapol_frame_io") == 0) {
hapd->ext_eapol_frame_io = atoi(value);
#ifdef CONFIG_DPP
} else if (os_strcasecmp(cmd, "dpp_config_obj_override") == 0) {
os_free(hapd->dpp_config_obj_override);
hapd->dpp_config_obj_override = os_strdup(value);
} else if (os_strcasecmp(cmd, "dpp_discovery_override") == 0) {
os_free(hapd->dpp_discovery_override);
hapd->dpp_discovery_override = os_strdup(value);
} else if (os_strcasecmp(cmd, "dpp_groups_override") == 0) {
os_free(hapd->dpp_groups_override);
hapd->dpp_groups_override = os_strdup(value);
} else if (os_strcasecmp(cmd, "dpp_devices_override") == 0) {
os_free(hapd->dpp_devices_override);
hapd->dpp_devices_override = os_strdup(value);
} else if (os_strcasecmp(cmd,
"dpp_ignore_netaccesskey_mismatch") == 0) {
hapd->dpp_ignore_netaccesskey_mismatch = atoi(value);
#endif /* CONFIG_DPP */
#endif /* CONFIG_TESTING_OPTIONS */
#ifdef CONFIG_MBO
} else if (os_strcasecmp(cmd, "mbo_assoc_disallow") == 0) {
@ -2622,6 +2640,43 @@ static int hostapd_ctrl_iface_receive_process(struct hostapd_data *hapd,
reply_size);
} else if (os_strcmp(buf, "TERMINATE") == 0) {
eloop_terminate();
#ifdef CONFIG_DPP
} else if (os_strncmp(buf, "DPP_QR_CODE ", 12) == 0) {
res = hostapd_dpp_qr_code(hapd, buf + 12);
if (res < 0) {
reply_len = -1;
} else {
reply_len = os_snprintf(reply, reply_size, "%d", res);
if (os_snprintf_error(reply_size, reply_len))
reply_len = -1;
}
} else if (os_strncmp(buf, "DPP_BOOTSTRAP_GEN ", 18) == 0) {
res = hostapd_dpp_bootstrap_gen(hapd, buf + 18);
if (res < 0) {
reply_len = -1;
} else {
reply_len = os_snprintf(reply, reply_size, "%d", res);
if (os_snprintf_error(reply_size, reply_len))
reply_len = -1;
}
} else if (os_strncmp(buf, "DPP_BOOTSTRAP_REMOVE ", 21) == 0) {
if (hostapd_dpp_bootstrap_remove(hapd, buf + 21) < 0)
reply_len = -1;
} else if (os_strncmp(buf, "DPP_BOOTSTRAP_GET_URI ", 22) == 0) {
const char *uri;
uri = hostapd_dpp_bootstrap_get_uri(hapd, atoi(buf + 22));
if (!uri) {
reply_len = -1;
} else {
reply_len = os_snprintf(reply, reply_size, "%s", uri);
if (os_snprintf_error(reply_size, reply_len))
reply_len = -1;
}
} else if (os_strncmp(buf, "DPP_AUTH_INIT ", 14) == 0) {
if (hostapd_dpp_auth_init(hapd, buf + 13) < 0)
reply_len = -1;
#endif /* CONFIG_DPP */
} else {
os_memcpy(reply, "UNKNOWN COMMAND\n", 16);
reply_len = 16;

863
src/ap/dpp_hostapd.c Normal file
View File

@ -0,0 +1,863 @@
/*
* hostapd / DPP integration
* Copyright (c) 2017, Qualcomm Atheros, Inc.
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#include "utils/includes.h"
#include "utils/common.h"
#include "utils/eloop.h"
#include "common/dpp.h"
#include "common/gas.h"
#include "common/wpa_ctrl.h"
#include "hostapd.h"
#include "ap_drv_ops.h"
#include "gas_query_ap.h"
#include "dpp_hostapd.h"
static void hostapd_dpp_auth_success(struct hostapd_data *hapd, int initiator);
static const u8 broadcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
static unsigned int hapd_dpp_next_id(struct hostapd_data *hapd)
{
struct dpp_bootstrap_info *bi;
unsigned int max_id = 0;
dl_list_for_each(bi, &hapd->dpp_bootstrap, struct dpp_bootstrap_info,
list) {
if (bi->id > max_id)
max_id = bi->id;
}
return max_id + 1;
}
/**
* hostapd_dpp_qr_code - Parse and add DPP bootstrapping info from a QR Code
* @hapd: Pointer to hostapd_data
* @cmd: DPP URI read from a QR Code
* Returns: Identifier of the stored info or -1 on failure
*/
int hostapd_dpp_qr_code(struct hostapd_data *hapd, const char *cmd)
{
struct dpp_bootstrap_info *bi;
struct dpp_authentication *auth = hapd->dpp_auth;
bi = dpp_parse_qr_code(cmd);
if (!bi)
return -1;
bi->id = hapd_dpp_next_id(hapd);
dl_list_add(&hapd->dpp_bootstrap, &bi->list);
if (auth && auth->response_pending &&
dpp_notify_new_qr_code(auth, bi) == 1) {
struct wpabuf *msg;
wpa_printf(MSG_DEBUG,
"DPP: Sending out pending authentication response");
msg = dpp_alloc_msg(DPP_PA_AUTHENTICATION_RESP,
wpabuf_len(auth->resp_attr));
if (!msg)
goto out;
wpabuf_put_buf(msg, hapd->dpp_auth->resp_attr);
hostapd_drv_send_action(hapd, auth->curr_freq, 0,
auth->peer_mac_addr,
wpabuf_head(msg), wpabuf_len(msg));
wpabuf_free(msg);
}
out:
return bi->id;
}
static char * get_param(const char *cmd, const char *param)
{
const char *pos, *end;
char *val;
size_t len;
pos = os_strstr(cmd, param);
if (!pos)
return NULL;
pos += os_strlen(param);
end = os_strchr(pos, ' ');
if (end)
len = end - pos;
else
len = os_strlen(pos);
val = os_malloc(len + 1);
if (!val)
return NULL;
os_memcpy(val, pos, len);
val[len] = '\0';
return val;
}
int hostapd_dpp_bootstrap_gen(struct hostapd_data *hapd, const char *cmd)
{
char *chan = NULL, *mac = NULL, *info = NULL, *pk = NULL, *curve = NULL;
char *key = NULL;
u8 *privkey = NULL;
size_t privkey_len = 0;
size_t len;
int ret = -1;
struct dpp_bootstrap_info *bi;
bi = os_zalloc(sizeof(*bi));
if (!bi)
goto fail;
if (os_strstr(cmd, "type=qrcode"))
bi->type = DPP_BOOTSTRAP_QR_CODE;
else
goto fail;
chan = get_param(cmd, " chan=");
mac = get_param(cmd, " mac=");
info = get_param(cmd, " info=");
curve = get_param(cmd, " curve=");
key = get_param(cmd, " key=");
if (key) {
privkey_len = os_strlen(key) / 2;
privkey = os_malloc(privkey_len);
if (!privkey ||
hexstr2bin(key, privkey, privkey_len) < 0)
goto fail;
}
pk = dpp_keygen(bi, curve, privkey, privkey_len);
if (!pk)
goto fail;
len = 4; /* "DPP:" */
if (chan) {
if (dpp_parse_uri_chan_list(bi, chan) < 0)
goto fail;
len += 3 + os_strlen(chan); /* C:...; */
}
if (mac) {
if (dpp_parse_uri_mac(bi, mac) < 0)
goto fail;
len += 3 + os_strlen(mac); /* M:...; */
}
if (info) {
if (dpp_parse_uri_info(bi, info) < 0)
goto fail;
len += 3 + os_strlen(info); /* I:...; */
}
len += 4 + os_strlen(pk);
bi->uri = os_malloc(len + 1);
if (!bi->uri)
goto fail;
os_snprintf(bi->uri, len + 1, "DPP:%s%s%s%s%s%s%s%s%sK:%s;;",
chan ? "C:" : "", chan ? chan : "", chan ? ";" : "",
mac ? "M:" : "", mac ? mac : "", mac ? ";" : "",
info ? "I:" : "", info ? info : "", info ? ";" : "",
pk);
bi->id = hapd_dpp_next_id(hapd);
dl_list_add(&hapd->dpp_bootstrap, &bi->list);
ret = bi->id;
bi = NULL;
fail:
os_free(curve);
os_free(pk);
os_free(chan);
os_free(mac);
os_free(info);
str_clear_free(key);
bin_clear_free(privkey, privkey_len);
dpp_bootstrap_info_free(bi);
return ret;
}
static struct dpp_bootstrap_info *
dpp_bootstrap_get_id(struct hostapd_data *hapd, unsigned int id)
{
struct dpp_bootstrap_info *bi;
dl_list_for_each(bi, &hapd->dpp_bootstrap, struct dpp_bootstrap_info,
list) {
if (bi->id == id)
return bi;
}
return NULL;
}
static int dpp_bootstrap_del(struct hostapd_data *hapd, unsigned int id)
{
struct dpp_bootstrap_info *bi, *tmp;
int found = 0;
dl_list_for_each_safe(bi, tmp, &hapd->dpp_bootstrap,
struct dpp_bootstrap_info, list) {
if (id && bi->id != id)
continue;
found = 1;
dl_list_del(&bi->list);
dpp_bootstrap_info_free(bi);
}
if (id == 0)
return 0; /* flush succeeds regardless of entries found */
return found ? 0 : -1;
}
int hostapd_dpp_bootstrap_remove(struct hostapd_data *hapd, const char *id)
{
unsigned int id_val;
if (os_strcmp(id, "*") == 0) {
id_val = 0;
} else {
id_val = atoi(id);
if (id_val == 0)
return -1;
}
return dpp_bootstrap_del(hapd, id_val);
}
const char * hostapd_dpp_bootstrap_get_uri(struct hostapd_data *hapd,
unsigned int id)
{
struct dpp_bootstrap_info *bi;
bi = dpp_bootstrap_get_id(hapd, id);
if (!bi)
return NULL;
return bi->uri;
}
void hostapd_dpp_tx_status(struct hostapd_data *hapd, const u8 *dst,
const u8 *data, size_t data_len, int ok)
{
wpa_printf(MSG_DEBUG, "DPP: TX status: dst=" MACSTR " ok=%d",
MAC2STR(dst), ok);
if (!hapd->dpp_auth) {
wpa_printf(MSG_DEBUG,
"DPP: Ignore TX status since there is no ongoing authentication exchange");
return;
}
if (hapd->dpp_auth->remove_on_tx_status) {
wpa_printf(MSG_DEBUG,
"DPP: Terminate authentication exchange due to an earlier error");
dpp_auth_deinit(hapd->dpp_auth);
hapd->dpp_auth = NULL;
return;
}
if (hapd->dpp_auth_ok_on_ack)
hostapd_dpp_auth_success(hapd, 1);
}
static void hostapd_dpp_set_testing_options(struct hostapd_data *hapd,
struct dpp_authentication *auth)
{
#ifdef CONFIG_TESTING_OPTIONS
if (hapd->dpp_config_obj_override)
auth->config_obj_override =
os_strdup(hapd->dpp_config_obj_override);
if (hapd->dpp_discovery_override)
auth->discovery_override =
os_strdup(hapd->dpp_discovery_override);
if (hapd->dpp_groups_override)
auth->groups_override = os_strdup(hapd->dpp_groups_override);
if (hapd->dpp_devices_override)
auth->devices_override = os_strdup(hapd->dpp_devices_override);
auth->ignore_netaccesskey_mismatch =
hapd->dpp_ignore_netaccesskey_mismatch;
#endif /* CONFIG_TESTING_OPTIONS */
}
int hostapd_dpp_auth_init(struct hostapd_data *hapd, const char *cmd)
{
const char *pos;
struct dpp_bootstrap_info *peer_bi, *own_bi = NULL;
struct wpabuf *msg;
const u8 *dst;
int res;
int configurator = 1;
struct dpp_configuration *conf_sta = NULL, *conf_ap = NULL;
pos = os_strstr(cmd, " peer=");
if (!pos)
return -1;
pos += 6;
peer_bi = dpp_bootstrap_get_id(hapd, atoi(pos));
if (!peer_bi) {
wpa_printf(MSG_INFO,
"DPP: Could not find bootstrapping info for the identified peer");
return -1;
}
pos = os_strstr(cmd, " own=");
if (pos) {
pos += 5;
own_bi = dpp_bootstrap_get_id(hapd, atoi(pos));
if (!own_bi) {
wpa_printf(MSG_INFO,
"DPP: Could not find bootstrapping info for the identified local entry");
return -1;
}
if (peer_bi->curve != own_bi->curve) {
wpa_printf(MSG_INFO,
"DPP: Mismatching curves in bootstrapping info (peer=%s own=%s)",
peer_bi->curve->name, own_bi->curve->name);
return -1;
}
}
pos = os_strstr(cmd, " role=");
if (pos) {
pos += 6;
if (os_strncmp(pos, "configurator", 12) == 0)
configurator = 1;
else if (os_strncmp(pos, "enrollee", 8) == 0)
configurator = 0;
else
goto fail;
}
if (os_strstr(cmd, " conf=sta-")) {
conf_sta = os_zalloc(sizeof(struct dpp_configuration));
if (!conf_sta)
goto fail;
/* TODO: Configuration of network parameters from upper layers
*/
os_memcpy(conf_sta->ssid, "test", 4);
conf_sta->ssid_len = 4;
if (os_strstr(cmd, " conf=sta-psk")) {
conf_sta->dpp = 0;
conf_sta->passphrase = os_strdup("secret passphrase");
if (!conf_sta->passphrase)
goto fail;
} else if (os_strstr(cmd, " conf=sta-dpp")) {
conf_sta->dpp = 1;
} else {
goto fail;
}
}
if (os_strstr(cmd, " conf=ap-")) {
conf_ap = os_zalloc(sizeof(struct dpp_configuration));
if (!conf_ap)
goto fail;
/* TODO: Configuration of network parameters from upper layers
*/
os_memcpy(conf_ap->ssid, "test", 4);
conf_ap->ssid_len = 4;
if (os_strstr(cmd, " conf=ap-psk")) {
conf_ap->dpp = 0;
conf_ap->passphrase = os_strdup("secret passphrase");
if (!conf_ap->passphrase)
goto fail;
} else if (os_strstr(cmd, " conf=ap-dpp")) {
conf_ap->dpp = 1;
} else {
goto fail;
}
}
pos = os_strstr(cmd, " expiry=");
if (pos) {
long int val;
pos += 8;
val = strtol(pos, NULL, 0);
if (val <= 0)
goto fail;
if (conf_sta)
conf_sta->netaccesskey_expiry = val;
if (conf_ap)
conf_ap->netaccesskey_expiry = val;
}
if (hapd->dpp_auth)
dpp_auth_deinit(hapd->dpp_auth);
hapd->dpp_auth = dpp_auth_init(hapd, peer_bi, own_bi, configurator);
if (!hapd->dpp_auth)
goto fail;
hostapd_dpp_set_testing_options(hapd, hapd->dpp_auth);
hapd->dpp_auth->conf_sta = conf_sta;
hapd->dpp_auth->conf_ap = conf_ap;
/* TODO: Support iteration over all frequencies and filtering of
* frequencies based on locally enabled channels that allow initiation
* of transmission. */
if (peer_bi->num_freq > 0)
hapd->dpp_auth->curr_freq = peer_bi->freq[0];
else
hapd->dpp_auth->curr_freq = 2412;
msg = dpp_alloc_msg(DPP_PA_AUTHENTICATION_REQ,
wpabuf_len(hapd->dpp_auth->req_attr));
if (!msg)
return -1;
wpabuf_put_buf(msg, hapd->dpp_auth->req_attr);
if (is_zero_ether_addr(peer_bi->mac_addr)) {
dst = broadcast;
} else {
dst = peer_bi->mac_addr;
os_memcpy(hapd->dpp_auth->peer_mac_addr, peer_bi->mac_addr,
ETH_ALEN);
}
hapd->dpp_auth_ok_on_ack = 0;
res = hostapd_drv_send_action(hapd, hapd->dpp_auth->curr_freq, 0,
dst, wpabuf_head(msg), wpabuf_len(msg));
wpabuf_free(msg);
return res;
fail:
dpp_configuration_free(conf_sta);
dpp_configuration_free(conf_ap);
return -1;
}
static void hostapd_dpp_rx_auth_req(struct hostapd_data *hapd, const u8 *src,
const u8 *buf, size_t len, unsigned int freq)
{
const u8 *r_bootstrap, *i_bootstrap, *wrapped_data;
u16 r_bootstrap_len, i_bootstrap_len, wrapped_data_len;
struct dpp_bootstrap_info *bi, *own_bi = NULL, *peer_bi = NULL;
struct wpabuf *msg;
wpa_printf(MSG_DEBUG, "DPP: Authentication Request from " MACSTR,
MAC2STR(src));
wrapped_data = dpp_get_attr(buf, len, DPP_ATTR_WRAPPED_DATA,
&wrapped_data_len);
if (!wrapped_data) {
wpa_printf(MSG_DEBUG,
"DPP: Missing required Wrapped data attribute");
return;
}
wpa_hexdump(MSG_MSGDUMP, "DPP: Wrapped data",
wrapped_data, wrapped_data_len);
r_bootstrap = dpp_get_attr(buf, len, DPP_ATTR_R_BOOTSTRAP_KEY_HASH,
&r_bootstrap_len);
if (!r_bootstrap || r_bootstrap > wrapped_data ||
r_bootstrap_len != SHA256_MAC_LEN) {
wpa_printf(MSG_DEBUG,
"DPP: Missing or invalid required Responder Bootstrapping Key Hash attribute");
return;
}
wpa_hexdump(MSG_MSGDUMP, "DPP: Responder Bootstrapping Key Hash",
r_bootstrap, r_bootstrap_len);
i_bootstrap = dpp_get_attr(buf, len, DPP_ATTR_I_BOOTSTRAP_KEY_HASH,
&i_bootstrap_len);
if (!i_bootstrap || i_bootstrap > wrapped_data ||
i_bootstrap_len != SHA256_MAC_LEN) {
wpa_printf(MSG_DEBUG,
"DPP: Missing or invalid required Initiator Bootstrapping Key Hash attribute");
return;
}
wpa_hexdump(MSG_MSGDUMP, "DPP: Initiator Bootstrapping Key Hash",
i_bootstrap, i_bootstrap_len);
/* Try to find own and peer bootstrapping key matches based on the
* received hash values */
dl_list_for_each(bi, &hapd->dpp_bootstrap, struct dpp_bootstrap_info,
list) {
if (!own_bi && bi->own &&
os_memcmp(bi->pubkey_hash, r_bootstrap,
SHA256_MAC_LEN) == 0) {
wpa_printf(MSG_DEBUG,
"DPP: Found matching own bootstrapping information");
own_bi = bi;
}
if (!peer_bi && !bi->own &&
os_memcmp(bi->pubkey_hash, i_bootstrap,
SHA256_MAC_LEN) == 0) {
wpa_printf(MSG_DEBUG,
"DPP: Found matching peer bootstrapping information");
peer_bi = bi;
}
if (own_bi && peer_bi)
break;
}
if (!own_bi) {
wpa_printf(MSG_DEBUG,
"DPP: No matching own bootstrapping key found - ignore message");
return;
}
if (hapd->dpp_auth) {
wpa_printf(MSG_DEBUG,
"DPP: Already in DPP authentication exchange - ignore new one");
return;
}
hapd->dpp_auth_ok_on_ack = 0;
hapd->dpp_auth = dpp_auth_req_rx(hapd->msg_ctx, hapd->dpp_allowed_roles,
hapd->dpp_qr_mutual,
peer_bi, own_bi, freq, buf,
wrapped_data, wrapped_data_len);
if (!hapd->dpp_auth) {
wpa_printf(MSG_DEBUG, "DPP: No response generated");
return;
}
hostapd_dpp_set_testing_options(hapd, hapd->dpp_auth);
os_memcpy(hapd->dpp_auth->peer_mac_addr, src, ETH_ALEN);
msg = dpp_alloc_msg(DPP_PA_AUTHENTICATION_RESP,
wpabuf_len(hapd->dpp_auth->resp_attr));
if (!msg)
return;
wpabuf_put_buf(msg, hapd->dpp_auth->resp_attr);
hostapd_drv_send_action(hapd, hapd->dpp_auth->curr_freq, 0,
src, wpabuf_head(msg), wpabuf_len(msg));
wpabuf_free(msg);
}
static void hostapd_dpp_gas_resp_cb(void *ctx, const u8 *addr, u8 dialog_token,
enum gas_query_ap_result result,
const struct wpabuf *adv_proto,
const struct wpabuf *resp, u16 status_code)
{
struct hostapd_data *hapd = ctx;
const u8 *pos;
struct dpp_authentication *auth = hapd->dpp_auth;
if (!auth || !auth->auth_success) {
wpa_printf(MSG_DEBUG, "DPP: No matching exchange in progress");
return;
}
if (!resp || status_code != WLAN_STATUS_SUCCESS) {
wpa_printf(MSG_DEBUG, "DPP: GAS query did not succeed");
goto fail;
}
wpa_hexdump_buf(MSG_DEBUG, "DPP: Configuration Response adv_proto",
adv_proto);
wpa_hexdump_buf(MSG_DEBUG, "DPP: Configuration Response (GAS response)",
resp);
if (wpabuf_len(adv_proto) != 10 ||
!(pos = wpabuf_head(adv_proto)) ||
pos[0] != WLAN_EID_ADV_PROTO ||
pos[1] != 8 ||
pos[3] != WLAN_EID_VENDOR_SPECIFIC ||
pos[4] != 5 ||
WPA_GET_BE24(&pos[5]) != OUI_WFA ||
pos[8] != 0x1a ||
pos[9] != 1) {
wpa_printf(MSG_DEBUG,
"DPP: Not a DPP Advertisement Protocol ID");
goto fail;
}
if (dpp_conf_resp_rx(auth, resp) < 0) {
wpa_printf(MSG_DEBUG, "DPP: Configuration attempt failed");
goto fail;
}
wpa_msg(hapd->msg_ctx, MSG_INFO, DPP_EVENT_CONF_RECEIVED);
if (auth->ssid_len)
wpa_msg(hapd->msg_ctx, MSG_INFO, DPP_EVENT_CONFOBJ_SSID "%s",
wpa_ssid_txt(auth->ssid, auth->ssid_len));
if (auth->connector) {
/* TODO: Save the Connector and consider using a command
* to fetch the value instead of sending an event with
* it. The Connector could end up being larger than what
* most clients are ready to receive as an event
* message. */
wpa_msg(hapd->msg_ctx, MSG_INFO, DPP_EVENT_CONNECTOR "%s",
auth->connector);
}
if (auth->c_sign_key) {
char *hex;
size_t hexlen;
hexlen = 2 * wpabuf_len(auth->c_sign_key) + 1;
hex = os_malloc(hexlen);
if (hex) {
wpa_snprintf_hex(hex, hexlen,
wpabuf_head(auth->c_sign_key),
wpabuf_len(auth->c_sign_key));
if (auth->c_sign_key_expiry)
wpa_msg(hapd->msg_ctx, MSG_INFO,
DPP_EVENT_C_SIGN_KEY "%s %lu", hex,
(unsigned long)
auth->c_sign_key_expiry);
else
wpa_msg(hapd->msg_ctx, MSG_INFO,
DPP_EVENT_C_SIGN_KEY "%s", hex);
os_free(hex);
}
}
if (auth->net_access_key) {
char *hex;
size_t hexlen;
hexlen = 2 * wpabuf_len(auth->net_access_key) + 1;
hex = os_malloc(hexlen);
if (hex) {
wpa_snprintf_hex(hex, hexlen,
wpabuf_head(auth->net_access_key),
wpabuf_len(auth->net_access_key));
if (auth->net_access_key_expiry)
wpa_msg(hapd->msg_ctx, MSG_INFO,
DPP_EVENT_NET_ACCESS_KEY "%s %lu", hex,
(unsigned long)
auth->net_access_key_expiry);
else
wpa_msg(hapd->msg_ctx, MSG_INFO,
DPP_EVENT_NET_ACCESS_KEY "%s", hex);
os_free(hex);
}
}
dpp_auth_deinit(hapd->dpp_auth);
hapd->dpp_auth = NULL;
return;
fail:
wpa_msg(hapd->msg_ctx, MSG_INFO, DPP_EVENT_CONF_FAILED);
dpp_auth_deinit(hapd->dpp_auth);
hapd->dpp_auth = NULL;
}
static void hostapd_dpp_start_gas_client(struct hostapd_data *hapd)
{
struct dpp_authentication *auth = hapd->dpp_auth;
struct wpabuf *buf, *conf_req;
char json[100];
int res;
int netrole_ap = 1;
os_snprintf(json, sizeof(json),
"{\"name\":\"Test\","
"\"wi-fi_tech\":\"infra\","
"\"netRole\":\"%s\"}",
netrole_ap ? "ap" : "sta");
wpa_printf(MSG_DEBUG, "DPP: GAS Config Attributes: %s", json);
conf_req = dpp_build_conf_req(auth, json);
if (!conf_req) {
wpa_printf(MSG_DEBUG,
"DPP: No configuration request data available");
return;
}
buf = gas_build_initial_req(0, 10 + 2 + wpabuf_len(conf_req));
if (!buf) {
wpabuf_free(conf_req);
return;
}
/* Advertisement Protocol IE */
wpabuf_put_u8(buf, WLAN_EID_ADV_PROTO);
wpabuf_put_u8(buf, 8); /* Length */
wpabuf_put_u8(buf, 0x7f);
wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC);
wpabuf_put_u8(buf, 5);
wpabuf_put_be24(buf, OUI_WFA);
wpabuf_put_u8(buf, DPP_OUI_TYPE);
wpabuf_put_u8(buf, 0x01);
/* GAS Query */
wpabuf_put_le16(buf, wpabuf_len(conf_req));
wpabuf_put_buf(buf, conf_req);
wpabuf_free(conf_req);
wpa_printf(MSG_DEBUG, "DPP: GAS request to " MACSTR " (freq %u MHz)",
MAC2STR(auth->peer_mac_addr), auth->curr_freq);
res = gas_query_ap_req(hapd->gas, auth->peer_mac_addr, auth->curr_freq,
buf, hostapd_dpp_gas_resp_cb, hapd);
if (res < 0) {
wpa_msg(hapd->msg_ctx, MSG_DEBUG,
"GAS: Failed to send Query Request");
wpabuf_free(buf);
} else {
wpa_printf(MSG_DEBUG,
"DPP: GAS query started with dialog token %u", res);
}
}
static void hostapd_dpp_auth_success(struct hostapd_data *hapd, int initiator)
{
wpa_printf(MSG_DEBUG, "DPP: Authentication succeeded");
wpa_msg(hapd->msg_ctx, MSG_INFO, DPP_EVENT_AUTH_SUCCESS "init=%d",
initiator);
if (!hapd->dpp_auth->configurator)
hostapd_dpp_start_gas_client(hapd);
}
static void hostapd_dpp_rx_auth_resp(struct hostapd_data *hapd, const u8 *src,
const u8 *buf, size_t len)
{
struct dpp_authentication *auth = hapd->dpp_auth;
struct wpabuf *msg, *attr;
wpa_printf(MSG_DEBUG, "DPP: Authentication Response from " MACSTR,
MAC2STR(src));
if (!auth) {
wpa_printf(MSG_DEBUG,
"DPP: No DPP Authentication in progress - drop");
return;
}
if (!is_zero_ether_addr(auth->peer_mac_addr) &&
os_memcmp(src, auth->peer_mac_addr, ETH_ALEN) != 0) {
wpa_printf(MSG_DEBUG, "DPP: MAC address mismatch (expected "
MACSTR ") - drop", MAC2STR(auth->peer_mac_addr));
return;
}
attr = dpp_auth_resp_rx(auth, buf, len);
if (!attr) {
if (auth->auth_resp_status == DPP_STATUS_RESPONSE_PENDING) {
wpa_printf(MSG_DEBUG, "DPP: Wait for full response");
return;
}
wpa_printf(MSG_DEBUG, "DPP: No confirm generated");
return;
}
os_memcpy(auth->peer_mac_addr, src, ETH_ALEN);
msg = dpp_alloc_msg(DPP_PA_AUTHENTICATION_CONF, wpabuf_len(attr));
if (!msg) {
wpabuf_free(attr);
return;
}
wpabuf_put_buf(msg, attr);
wpabuf_free(attr);
hostapd_drv_send_action(hapd, auth->curr_freq, 0, src,
wpabuf_head(msg), wpabuf_len(msg));
wpabuf_free(msg);
hapd->dpp_auth_ok_on_ack = 1;
}
static void hostapd_dpp_rx_auth_conf(struct hostapd_data *hapd, const u8 *src,
const u8 *buf, size_t len)
{
struct dpp_authentication *auth = hapd->dpp_auth;
wpa_printf(MSG_DEBUG, "DPP: Authentication Confirmation from " MACSTR,
MAC2STR(src));
if (!auth) {
wpa_printf(MSG_DEBUG,
"DPP: No DPP Authentication in progress - drop");
return;
}
if (os_memcmp(src, auth->peer_mac_addr, ETH_ALEN) != 0) {
wpa_printf(MSG_DEBUG, "DPP: MAC address mismatch (expected "
MACSTR ") - drop", MAC2STR(auth->peer_mac_addr));
return;
}
if (dpp_auth_conf_rx(auth, buf, len) < 0) {
wpa_printf(MSG_DEBUG, "DPP: Authentication failed");
return;
}
hostapd_dpp_auth_success(hapd, 0);
}
void hostapd_dpp_rx_action(struct hostapd_data *hapd, const u8 *src,
const u8 *buf, size_t len, unsigned int freq)
{
enum dpp_public_action_frame_type type;
if (len < 1)
return;
type = buf[0];
buf++;
len--;
wpa_printf(MSG_DEBUG,
"DPP: Received DPP Public Action frame type %d from "
MACSTR " freq=%u",
type, MAC2STR(src), freq);
wpa_hexdump(MSG_MSGDUMP, "DPP: Received message attributes", buf, len);
if (dpp_check_attrs(buf, len) < 0)
return;
switch (type) {
case DPP_PA_AUTHENTICATION_REQ:
hostapd_dpp_rx_auth_req(hapd, src, buf, len, freq);
break;
case DPP_PA_AUTHENTICATION_RESP:
hostapd_dpp_rx_auth_resp(hapd, src, buf, len);
break;
case DPP_PA_AUTHENTICATION_CONF:
hostapd_dpp_rx_auth_conf(hapd, src, buf, len);
break;
default:
wpa_printf(MSG_DEBUG,
"DPP: Ignored unsupported frame subtype %d", type);
break;
}
}
int hostapd_dpp_init(struct hostapd_data *hapd)
{
dl_list_init(&hapd->dpp_bootstrap);
hapd->dpp_allowed_roles = DPP_CAPAB_CONFIGURATOR | DPP_CAPAB_ENROLLEE;
hapd->dpp_init_done = 1;
return 0;
}
void hostapd_dpp_deinit(struct hostapd_data *hapd)
{
#ifdef CONFIG_TESTING_OPTIONS
os_free(hapd->dpp_config_obj_override);
hapd->dpp_config_obj_override = NULL;
os_free(hapd->dpp_discovery_override);
hapd->dpp_discovery_override = NULL;
os_free(hapd->dpp_groups_override);
hapd->dpp_groups_override = NULL;
os_free(hapd->dpp_devices_override);
hapd->dpp_devices_override = NULL;
hapd->dpp_ignore_netaccesskey_mismatch = 0;
#endif /* CONFIG_TESTING_OPTIONS */
if (!hapd->dpp_init_done)
return;
dpp_bootstrap_del(hapd, 0);
dpp_auth_deinit(hapd->dpp_auth);
hapd->dpp_auth = NULL;
}

25
src/ap/dpp_hostapd.h Normal file
View File

@ -0,0 +1,25 @@
/*
* hostapd / DPP integration
* Copyright (c) 2017, Qualcomm Atheros, Inc.
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#ifndef DPP_HOSTAPD_H
#define DPP_HOSTAPD_H
int hostapd_dpp_qr_code(struct hostapd_data *hapd, const char *cmd);
int hostapd_dpp_bootstrap_gen(struct hostapd_data *hapd, const char *cmd);
int hostapd_dpp_bootstrap_remove(struct hostapd_data *hapd, const char *id);
const char * hostapd_dpp_bootstrap_get_uri(struct hostapd_data *hapd,
unsigned int id);
int hostapd_dpp_auth_init(struct hostapd_data *hapd, const char *cmd);
void hostapd_dpp_rx_action(struct hostapd_data *hapd, const u8 *src,
const u8 *buf, size_t len, unsigned int freq);
void hostapd_dpp_tx_status(struct hostapd_data *hapd, const u8 *dst,
const u8 *data, size_t data_len, int ok);
int hostapd_dpp_init(struct hostapd_data *hapd);
void hostapd_dpp_deinit(struct hostapd_data *hapd);
#endif /* DPP_HOSTAPD_H */

18
src/ap/drv_callbacks.c
View File

@ -14,6 +14,7 @@
#include "drivers/driver.h"
#include "common/ieee802_11_defs.h"
#include "common/ieee802_11_common.h"
#include "common/dpp.h"
#include "common/wpa_ctrl.h"
#include "crypto/random.h"
#include "p2p/p2p.h"
@ -36,6 +37,7 @@
#include "dfs.h"
#include "beacon.h"
#include "mbo_ap.h"
#include "dpp_hostapd.h"
int hostapd_notif_assoc(struct hostapd_data *hapd, const u8 *addr,
@ -890,7 +892,23 @@ static void hostapd_action_rx(struct hostapd_data *hapd,
return;
}
#endif /* CONFIG_FST */
#ifdef CONFIG_DPP
if (plen >= 1 + 4 &&
mgmt->u.action.u.vs_public_action.action ==
WLAN_PA_VENDOR_SPECIFIC &&
WPA_GET_BE24(mgmt->u.action.u.vs_public_action.oui) ==
OUI_WFA &&
mgmt->u.action.u.vs_public_action.variable[0] ==
DPP_OUI_TYPE) {
const u8 *pos, *end;
pos = &mgmt->u.action.u.vs_public_action.variable[1];
end = drv_mgmt->frame + drv_mgmt->frame_len;
hostapd_dpp_rx_action(hapd, mgmt->sa, pos, end - pos,
drv_mgmt->freq);
return;
}
#endif /* CONFIG_DPP */
}

714
src/ap/gas_query_ap.c Normal file
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@ -0,0 +1,714 @@
/*
* Generic advertisement service (GAS) query (hostapd)
* Copyright (c) 2009, Atheros Communications
* Copyright (c) 2011-2017, Qualcomm Atheros, Inc.
* Copyright (c) 2011-2014, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#include "includes.h"
#include "common.h"
#include "utils/eloop.h"
#include "utils/list.h"
#include "common/ieee802_11_defs.h"
#include "common/gas.h"
#include "common/wpa_ctrl.h"
#include "hostapd.h"
#include "sta_info.h"
#include "ap_drv_ops.h"
#include "gas_query_ap.h"
/** GAS query timeout in seconds */
#define GAS_QUERY_TIMEOUT_PERIOD 2
/* GAS query wait-time / duration in ms */
#define GAS_QUERY_WAIT_TIME_INITIAL 1000
#define GAS_QUERY_WAIT_TIME_COMEBACK 150
/**
* struct gas_query_pending - Pending GAS query
*/
struct gas_query_pending {
struct dl_list list;
struct gas_query_ap *gas;
u8 addr[ETH_ALEN];
u8 dialog_token;
u8 next_frag_id;
unsigned int wait_comeback:1;
unsigned int offchannel_tx_started:1;
unsigned int retry:1;
int freq;
u16 status_code;
struct wpabuf *req;
struct wpabuf *adv_proto;
struct wpabuf *resp;
struct os_reltime last_oper;
void (*cb)(void *ctx, const u8 *dst, u8 dialog_token,
enum gas_query_ap_result result,
const struct wpabuf *adv_proto,
const struct wpabuf *resp, u16 status_code);
void *ctx;
u8 sa[ETH_ALEN];
};
/**
* struct gas_query_ap - Internal GAS query data
*/
struct gas_query_ap {
struct hostapd_data *hapd;
void *msg_ctx;
struct dl_list pending; /* struct gas_query_pending */
struct gas_query_pending *current;
};
static void gas_query_tx_comeback_timeout(void *eloop_data, void *user_ctx);
static void gas_query_timeout(void *eloop_data, void *user_ctx);
static void gas_query_rx_comeback_timeout(void *eloop_data, void *user_ctx);
static void gas_query_tx_initial_req(struct gas_query_ap *gas,
struct gas_query_pending *query);
static int gas_query_new_dialog_token(struct gas_query_ap *gas, const u8 *dst);
static int ms_from_time(struct os_reltime *last)
{
struct os_reltime now, res;
os_get_reltime(&now);
os_reltime_sub(&now, last, &res);
return res.sec * 1000 + res.usec / 1000;
}
/**
* gas_query_ap_init - Initialize GAS query component
* @hapd: Pointer to hostapd data
* Returns: Pointer to GAS query data or %NULL on failure
*/
struct gas_query_ap * gas_query_ap_init(struct hostapd_data *hapd,
void *msg_ctx)
{
struct gas_query_ap *gas;
gas = os_zalloc(sizeof(*gas));
if (!gas)
return NULL;
gas->hapd = hapd;
gas->msg_ctx = msg_ctx;
dl_list_init(&gas->pending);
return gas;
}
static const char * gas_result_txt(enum gas_query_ap_result result)
{
switch (result) {
case GAS_QUERY_AP_SUCCESS:
return "SUCCESS";
case GAS_QUERY_AP_FAILURE:
return "FAILURE";
case GAS_QUERY_AP_TIMEOUT:
return "TIMEOUT";
case GAS_QUERY_AP_PEER_ERROR:
return "PEER_ERROR";
case GAS_QUERY_AP_INTERNAL_ERROR:
return "INTERNAL_ERROR";
case GAS_QUERY_AP_DELETED_AT_DEINIT:
return "DELETED_AT_DEINIT";
}
return "N/A";
}
static void gas_query_free(struct gas_query_pending *query, int del_list)
{
if (del_list)
dl_list_del(&query->list);
wpabuf_free(query->req);
wpabuf_free(query->adv_proto);
wpabuf_free(query->resp);
os_free(query);
}
static void gas_query_done(struct gas_query_ap *gas,
struct gas_query_pending *query,
enum gas_query_ap_result result)
{
wpa_msg(gas->msg_ctx, MSG_INFO, GAS_QUERY_DONE "addr=" MACSTR
" dialog_token=%u freq=%d status_code=%u result=%s",
MAC2STR(query->addr), query->dialog_token, query->freq,
query->status_code, gas_result_txt(result));
if (gas->current == query)
gas->current = NULL;
eloop_cancel_timeout(gas_query_tx_comeback_timeout, gas, query);
eloop_cancel_timeout(gas_query_timeout, gas, query);
eloop_cancel_timeout(gas_query_rx_comeback_timeout, gas, query);
dl_list_del(&query->list);
query->cb(query->ctx, query->addr, query->dialog_token, result,
query->adv_proto, query->resp, query->status_code);
gas_query_free(query, 0);
}
/**
* gas_query_ap_deinit - Deinitialize GAS query component
* @gas: GAS query data from gas_query_init()
*/
void gas_query_ap_deinit(struct gas_query_ap *gas)
{
struct gas_query_pending *query, *next;
if (gas == NULL)
return;
dl_list_for_each_safe(query, next, &gas->pending,
struct gas_query_pending, list)
gas_query_done(gas, query, GAS_QUERY_AP_DELETED_AT_DEINIT);
os_free(gas);
}
static struct gas_query_pending *
gas_query_get_pending(struct gas_query_ap *gas, const u8 *addr, u8 dialog_token)
{
struct gas_query_pending *q;
dl_list_for_each(q, &gas->pending, struct gas_query_pending, list) {
if (os_memcmp(q->addr, addr, ETH_ALEN) == 0 &&
q->dialog_token == dialog_token)
return q;
}
return NULL;
}
static int gas_query_append(struct gas_query_pending *query, const u8 *data,
size_t len)
{
if (wpabuf_resize(&query->resp, len) < 0) {
wpa_printf(MSG_DEBUG, "GAS: No memory to store the response");
return -1;
}
wpabuf_put_data(query->resp, data, len);
return 0;
}
void gas_query_ap_tx_status(struct gas_query_ap *gas, const u8 *dst,
const u8 *data, size_t data_len, int ok)
{
struct gas_query_pending *query;
int dur;
if (!gas || !gas->current) {
wpa_printf(MSG_DEBUG, "GAS: Unexpected TX status: dst=" MACSTR
" ok=%d - no query in progress", MAC2STR(dst), ok);
return;
}
query = gas->current;
dur = ms_from_time(&query->last_oper);
wpa_printf(MSG_DEBUG, "GAS: TX status: dst=" MACSTR
" ok=%d query=%p dialog_token=%u dur=%d ms",
MAC2STR(dst), ok, query, query->dialog_token, dur);
if (os_memcmp(dst, query->addr, ETH_ALEN) != 0) {
wpa_printf(MSG_DEBUG, "GAS: TX status for unexpected destination");
return;
}
os_get_reltime(&query->last_oper);
eloop_cancel_timeout(gas_query_timeout, gas, query);
if (!ok) {
wpa_printf(MSG_DEBUG, "GAS: No ACK to GAS request");
eloop_register_timeout(0, 250000, gas_query_timeout,
gas, query);
} else {
eloop_register_timeout(GAS_QUERY_TIMEOUT_PERIOD, 0,
gas_query_timeout, gas, query);
}
if (query->wait_comeback && !query->retry) {
eloop_cancel_timeout(gas_query_rx_comeback_timeout,
gas, query);
eloop_register_timeout(
0, (GAS_QUERY_WAIT_TIME_COMEBACK + 10) * 1000,
gas_query_rx_comeback_timeout, gas, query);
}
}
static int pmf_in_use(struct hostapd_data *hapd, const u8 *addr)
{
struct sta_info *sta;
sta = ap_get_sta(hapd, addr);
return sta && (sta->flags & WLAN_STA_MFP);
}
static int gas_query_tx(struct gas_query_ap *gas,
struct gas_query_pending *query,
struct wpabuf *req, unsigned int wait_time)
{
int res, prot = pmf_in_use(gas->hapd, query->addr);
wpa_printf(MSG_DEBUG, "GAS: Send action frame to " MACSTR " len=%u "
"freq=%d prot=%d using src addr " MACSTR,
MAC2STR(query->addr), (unsigned int) wpabuf_len(req),
query->freq, prot, MAC2STR(query->sa));
if (prot) {
u8 *categ = wpabuf_mhead_u8(req);
*categ = WLAN_ACTION_PROTECTED_DUAL;
}
os_get_reltime(&query->last_oper);
res = hostapd_drv_send_action(gas->hapd, query->freq, wait_time,
query->addr, wpabuf_head(req),
wpabuf_len(req));
return res;
}
static void gas_query_tx_comeback_req(struct gas_query_ap *gas,
struct gas_query_pending *query)
{
struct wpabuf *req;
unsigned int wait_time;
req = gas_build_comeback_req(query->dialog_token);
if (req == NULL) {
gas_query_done(gas, query, GAS_QUERY_AP_INTERNAL_ERROR);
return;
}
wait_time = (query->retry || !query->offchannel_tx_started) ?
GAS_QUERY_WAIT_TIME_INITIAL : GAS_QUERY_WAIT_TIME_COMEBACK;
if (gas_query_tx(gas, query, req, wait_time) < 0) {
wpa_printf(MSG_DEBUG, "GAS: Failed to send Action frame to "
MACSTR, MAC2STR(query->addr));
gas_query_done(gas, query, GAS_QUERY_AP_INTERNAL_ERROR);
}
wpabuf_free(req);
}
static void gas_query_rx_comeback_timeout(void *eloop_data, void *user_ctx)
{
struct gas_query_ap *gas = eloop_data;
struct gas_query_pending *query = user_ctx;
int dialog_token;
wpa_printf(MSG_DEBUG,
"GAS: No response to comeback request received (retry=%u)",
query->retry);
if (gas->current != query || query->retry)
return;
dialog_token = gas_query_new_dialog_token(gas, query->addr);
if (dialog_token < 0)
return;
wpa_printf(MSG_DEBUG,
"GAS: Retry GAS query due to comeback response timeout");
query->retry = 1;
query->dialog_token = dialog_token;
*(wpabuf_mhead_u8(query->req) + 2) = dialog_token;
query->wait_comeback = 0;
query->next_frag_id = 0;
wpabuf_free(query->adv_proto);
query->adv_proto = NULL;
eloop_cancel_timeout(gas_query_tx_comeback_timeout, gas, query);
eloop_cancel_timeout(gas_query_timeout, gas, query);
gas_query_tx_initial_req(gas, query);
}
static void gas_query_tx_comeback_timeout(void *eloop_data, void *user_ctx)
{
struct gas_query_ap *gas = eloop_data;
struct gas_query_pending *query = user_ctx;
wpa_printf(MSG_DEBUG, "GAS: Comeback timeout for request to " MACSTR,
MAC2STR(query->addr));
gas_query_tx_comeback_req(gas, query);
}
static void gas_query_tx_comeback_req_delay(struct gas_query_ap *gas,
struct gas_query_pending *query,
u16 comeback_delay)
{
unsigned int secs, usecs;
secs = (comeback_delay * 1024) / 1000000;
usecs = comeback_delay * 1024 - secs * 1000000;
wpa_printf(MSG_DEBUG, "GAS: Send comeback request to " MACSTR
" in %u secs %u usecs", MAC2STR(query->addr), secs, usecs);
eloop_cancel_timeout(gas_query_tx_comeback_timeout, gas, query);
eloop_register_timeout(secs, usecs, gas_query_tx_comeback_timeout,
gas, query);
}
static void gas_query_rx_initial(struct gas_query_ap *gas,
struct gas_query_pending *query,
const u8 *adv_proto, const u8 *resp,
size_t len, u16 comeback_delay)
{
wpa_printf(MSG_DEBUG, "GAS: Received initial response from "
MACSTR " (dialog_token=%u comeback_delay=%u)",
MAC2STR(query->addr), query->dialog_token, comeback_delay);
query->adv_proto = wpabuf_alloc_copy(adv_proto, 2 + adv_proto[1]);
if (query->adv_proto == NULL) {
gas_query_done(gas, query, GAS_QUERY_AP_INTERNAL_ERROR);
return;
}
if (comeback_delay) {
eloop_cancel_timeout(gas_query_timeout, gas, query);
query->wait_comeback = 1;
gas_query_tx_comeback_req_delay(gas, query, comeback_delay);
return;
}
/* Query was completed without comeback mechanism */
if (gas_query_append(query, resp, len) < 0) {
gas_query_done(gas, query, GAS_QUERY_AP_INTERNAL_ERROR);
return;
}
gas_query_done(gas, query, GAS_QUERY_AP_SUCCESS);
}
static void gas_query_rx_comeback(struct gas_query_ap *gas,
struct gas_query_pending *query,
const u8 *adv_proto, const u8 *resp,
size_t len, u8 frag_id, u8 more_frags,
u16 comeback_delay)
{
wpa_printf(MSG_DEBUG, "GAS: Received comeback response from "
MACSTR " (dialog_token=%u frag_id=%u more_frags=%u "
"comeback_delay=%u)",
MAC2STR(query->addr), query->dialog_token, frag_id,
more_frags, comeback_delay);
eloop_cancel_timeout(gas_query_rx_comeback_timeout, gas, query);
if ((size_t) 2 + adv_proto[1] != wpabuf_len(query->adv_proto) ||
os_memcmp(adv_proto, wpabuf_head(query->adv_proto),
wpabuf_len(query->adv_proto)) != 0) {
wpa_printf(MSG_DEBUG, "GAS: Advertisement Protocol changed "
"between initial and comeback response from "
MACSTR, MAC2STR(query->addr));
gas_query_done(gas, query, GAS_QUERY_AP_PEER_ERROR);
return;
}
if (comeback_delay) {
if (frag_id) {
wpa_printf(MSG_DEBUG, "GAS: Invalid comeback response "
"with non-zero frag_id and comeback_delay "
"from " MACSTR, MAC2STR(query->addr));
gas_query_done(gas, query, GAS_QUERY_AP_PEER_ERROR);
return;
}
gas_query_tx_comeback_req_delay(gas, query, comeback_delay);
return;
}
if (frag_id != query->next_frag_id) {
wpa_printf(MSG_DEBUG, "GAS: Unexpected frag_id in response "
"from " MACSTR, MAC2STR(query->addr));
if (frag_id + 1 == query->next_frag_id) {
wpa_printf(MSG_DEBUG, "GAS: Drop frame as possible "
"retry of previous fragment");
return;
}
gas_query_done(gas, query, GAS_QUERY_AP_PEER_ERROR);
return;
}
query->next_frag_id++;
if (gas_query_append(query, resp, len) < 0) {
gas_query_done(gas, query, GAS_QUERY_AP_INTERNAL_ERROR);
return;
}
if (more_frags) {
gas_query_tx_comeback_req(gas, query);
return;
}
gas_query_done(gas, query, GAS_QUERY_AP_SUCCESS);
}
/**
* gas_query_ap_rx - Indicate reception of a Public Action or Protected Dual
* frame
* @gas: GAS query data from gas_query_init()
* @sa: Source MAC address of the Action frame
* @categ: Category of the Action frame
* @data: Payload of the Action frame
* @len: Length of @data
* @freq: Frequency (in MHz) on which the frame was received
* Returns: 0 if the Public Action frame was a GAS frame or -1 if not
*/
int gas_query_ap_rx(struct gas_query_ap *gas, const u8 *sa, u8 categ,
const u8 *data, size_t len, int freq)
{
struct gas_query_pending *query;
u8 action, dialog_token, frag_id = 0, more_frags = 0;
u16 comeback_delay, resp_len;
const u8 *pos, *adv_proto;
int prot, pmf;
unsigned int left;
if (!gas || len < 4)
return -1;
pos = data;
action = *pos++;
dialog_token = *pos++;
if (action != WLAN_PA_GAS_INITIAL_RESP &&
action != WLAN_PA_GAS_COMEBACK_RESP)
return -1; /* Not a GAS response */
prot = categ == WLAN_ACTION_PROTECTED_DUAL;
pmf = pmf_in_use(gas->hapd, sa);
if (prot && !pmf) {
wpa_printf(MSG_DEBUG, "GAS: Drop unexpected protected GAS frame when PMF is disabled");
return 0;
}
if (!prot && pmf) {
wpa_printf(MSG_DEBUG, "GAS: Drop unexpected unprotected GAS frame when PMF is enabled");
return 0;
}
query = gas_query_get_pending(gas, sa, dialog_token);
if (query == NULL) {
wpa_printf(MSG_DEBUG, "GAS: No pending query found for " MACSTR
" dialog token %u", MAC2STR(sa), dialog_token);
return -1;
}
wpa_printf(MSG_DEBUG, "GAS: Response in %d ms from " MACSTR,
ms_from_time(&query->last_oper), MAC2STR(sa));
if (query->wait_comeback && action == WLAN_PA_GAS_INITIAL_RESP) {
wpa_printf(MSG_DEBUG, "GAS: Unexpected initial response from "
MACSTR " dialog token %u when waiting for comeback "
"response", MAC2STR(sa), dialog_token);
return 0;
}
if (!query->wait_comeback && action == WLAN_PA_GAS_COMEBACK_RESP) {
wpa_printf(MSG_DEBUG, "GAS: Unexpected comeback response from "
MACSTR " dialog token %u when waiting for initial "
"response", MAC2STR(sa), dialog_token);
return 0;
}
query->status_code = WPA_GET_LE16(pos);
pos += 2;
if (query->status_code == WLAN_STATUS_QUERY_RESP_OUTSTANDING &&
action == WLAN_PA_GAS_COMEBACK_RESP) {
wpa_printf(MSG_DEBUG, "GAS: Allow non-zero status for outstanding comeback response");
} else if (query->status_code != WLAN_STATUS_SUCCESS) {
wpa_printf(MSG_DEBUG, "GAS: Query to " MACSTR " dialog token "
"%u failed - status code %u",
MAC2STR(sa), dialog_token, query->status_code);
gas_query_done(gas, query, GAS_QUERY_AP_FAILURE);
return 0;
}
if (action == WLAN_PA_GAS_COMEBACK_RESP) {
if (pos + 1 > data + len)
return 0;
frag_id = *pos & 0x7f;
more_frags = (*pos & 0x80) >> 7;
pos++;
}
/* Comeback Delay */
if (pos + 2 > data + len)
return 0;
comeback_delay = WPA_GET_LE16(pos);
pos += 2;
/* Advertisement Protocol element */
if (pos + 2 > data + len || pos + 2 + pos[1] > data + len) {
wpa_printf(MSG_DEBUG, "GAS: No room for Advertisement "
"Protocol element in the response from " MACSTR,
MAC2STR(sa));
return 0;
}
if (*pos != WLAN_EID_ADV_PROTO) {
wpa_printf(MSG_DEBUG, "GAS: Unexpected Advertisement "
"Protocol element ID %u in response from " MACSTR,
*pos, MAC2STR(sa));
return 0;
}
adv_proto = pos;
pos += 2 + pos[1];
/* Query Response Length */
if (pos + 2 > data + len) {
wpa_printf(MSG_DEBUG, "GAS: No room for GAS Response Length");
return 0;
}
resp_len = WPA_GET_LE16(pos);
pos += 2;
left = data + len - pos;
if (resp_len > left) {
wpa_printf(MSG_DEBUG, "GAS: Truncated Query Response in "
"response from " MACSTR, MAC2STR(sa));
return 0;
}
if (resp_len < left) {
wpa_printf(MSG_DEBUG, "GAS: Ignore %u octets of extra data "
"after Query Response from " MACSTR,
left - resp_len, MAC2STR(sa));
}
if (action == WLAN_PA_GAS_COMEBACK_RESP)
gas_query_rx_comeback(gas, query, adv_proto, pos, resp_len,
frag_id, more_frags, comeback_delay);
else
gas_query_rx_initial(gas, query, adv_proto, pos, resp_len,
comeback_delay);
return 0;
}
static void gas_query_timeout(void *eloop_data, void *user_ctx)
{
struct gas_query_ap *gas = eloop_data;
struct gas_query_pending *query = user_ctx;
wpa_printf(MSG_DEBUG, "GAS: No response received for query to " MACSTR
" dialog token %u",
MAC2STR(query->addr), query->dialog_token);
gas_query_done(gas, query, GAS_QUERY_AP_TIMEOUT);
}
static int gas_query_dialog_token_available(struct gas_query_ap *gas,
const u8 *dst, u8 dialog_token)
{
struct gas_query_pending *q;
dl_list_for_each(q, &gas->pending, struct gas_query_pending, list) {
if (os_memcmp(dst, q->addr, ETH_ALEN) == 0 &&
dialog_token == q->dialog_token)
return 0;
}
return 1;
}
static void gas_query_tx_initial_req(struct gas_query_ap *gas,
struct gas_query_pending *query)
{
if (gas_query_tx(gas, query, query->req,
GAS_QUERY_WAIT_TIME_INITIAL) < 0) {
wpa_printf(MSG_DEBUG, "GAS: Failed to send Action frame to "
MACSTR, MAC2STR(query->addr));
gas_query_done(gas, query, GAS_QUERY_AP_INTERNAL_ERROR);
return;
}
gas->current = query;
wpa_printf(MSG_DEBUG, "GAS: Starting query timeout for dialog token %u",
query->dialog_token);
eloop_register_timeout(GAS_QUERY_TIMEOUT_PERIOD, 0,
gas_query_timeout, gas, query);
}
static int gas_query_new_dialog_token(struct gas_query_ap *gas, const u8 *dst)
{
static int next_start = 0;
int dialog_token;
for (dialog_token = 0; dialog_token < 256; dialog_token++) {
if (gas_query_dialog_token_available(
gas, dst, (next_start + dialog_token) % 256))
break;
}
if (dialog_token == 256)
return -1; /* Too many pending queries */
dialog_token = (next_start + dialog_token) % 256;
next_start = (dialog_token + 1) % 256;
return dialog_token;
}
/**
* gas_query_ap_req - Request a GAS query
* @gas: GAS query data from gas_query_init()
* @dst: Destination MAC address for the query
* @freq: Frequency (in MHz) for the channel on which to send the query
* @req: GAS query payload (to be freed by gas_query module in case of success
* return)
* @cb: Callback function for reporting GAS query result and response
* @ctx: Context pointer to use with the @cb call
* Returns: dialog token (>= 0) on success or -1 on failure
*/
int gas_query_ap_req(struct gas_query_ap *gas, const u8 *dst, int freq,
struct wpabuf *req,
void (*cb)(void *ctx, const u8 *dst, u8 dialog_token,
enum gas_query_ap_result result,
const struct wpabuf *adv_proto,
const struct wpabuf *resp, u16 status_code),
void *ctx)
{
struct gas_query_pending *query;
int dialog_token;
if (!gas || wpabuf_len(req) < 3)
return -1;
dialog_token = gas_query_new_dialog_token(gas, dst);
if (dialog_token < 0)
return -1;
query = os_zalloc(sizeof(*query));
if (query == NULL)
return -1;
query->gas = gas;
os_memcpy(query->addr, dst, ETH_ALEN);
query->dialog_token = dialog_token;
query->freq = freq;
query->cb = cb;
query->ctx = ctx;
query->req = req;
dl_list_add(&gas->pending, &query->list);
*(wpabuf_mhead_u8(req) + 2) = dialog_token;
wpa_msg(gas->msg_ctx, MSG_INFO, GAS_QUERY_START "addr=" MACSTR
" dialog_token=%u freq=%d",
MAC2STR(query->addr), query->dialog_token, query->freq);
gas_query_tx_initial_req(gas, query);
return dialog_token;
}

43
src/ap/gas_query_ap.h Normal file
View File

@ -0,0 +1,43 @@
/*
* Generic advertisement service (GAS) query
* Copyright (c) 2009, Atheros Communications
* Copyright (c) 2011-2017, Qualcomm Atheros
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#ifndef GAS_QUERY_AP_H
#define GAS_QUERY_AP_H
struct gas_query_ap;
struct gas_query_ap * gas_query_ap_init(struct hostapd_data *hapd,
void *msg_ctx);
void gas_query_ap_deinit(struct gas_query_ap *gas);
int gas_query_ap_rx(struct gas_query_ap *gas, const u8 *sa, u8 categ,
const u8 *data, size_t len, int freq);
/**
* enum gas_query_ap_result - GAS query result
*/
enum gas_query_ap_result {
GAS_QUERY_AP_SUCCESS,
GAS_QUERY_AP_FAILURE,
GAS_QUERY_AP_TIMEOUT,
GAS_QUERY_AP_PEER_ERROR,
GAS_QUERY_AP_INTERNAL_ERROR,
GAS_QUERY_AP_DELETED_AT_DEINIT
};
int gas_query_ap_req(struct gas_query_ap *gas, const u8 *dst, int freq,
struct wpabuf *req,
void (*cb)(void *ctx, const u8 *dst, u8 dialog_token,
enum gas_query_ap_result result,
const struct wpabuf *adv_proto,
const struct wpabuf *resp, u16 status_code),
void *ctx);
void gas_query_ap_tx_status(struct gas_query_ap *gas, const u8 *dst,
const u8 *data, size_t data_len, int ok);
#endif /* GAS_QUERY_AP_H */

14
src/ap/hostapd.c
View File

@ -31,6 +31,8 @@
#include "vlan_init.h"
#include "wpa_auth.h"
#include "wps_hostapd.h"
#include "dpp_hostapd.h"
#include "gas_query_ap.h"
#include "hw_features.h"
#include "wpa_auth_glue.h"
#include "ap_drv_ops.h"
@ -302,6 +304,10 @@ static void hostapd_free_hapd_data(struct hostapd_data *hapd)
#endif /* CONFIG_NO_RADIUS */
hostapd_deinit_wps(hapd);
#ifdef CONFIG_DPP
hostapd_dpp_deinit(hapd);
gas_query_ap_deinit(hapd->gas);
#endif /* CONFIG_DPP */
authsrv_deinit(hapd);
@ -1077,6 +1083,14 @@ static int hostapd_setup_bss(struct hostapd_data *hapd, int first)
if (hostapd_init_wps(hapd, conf))
return -1;
#ifdef CONFIG_DPP
hapd->gas = gas_query_ap_init(hapd, hapd->msg_ctx);
if (!hapd->gas)
return -1;
if (hostapd_dpp_init(hapd))
return -1;
#endif /* CONFIG_DPP */
if (authsrv_init(hapd) < 0)
return -1;

17
src/ap/hostapd.h
View File

@ -319,6 +319,23 @@ struct hostapd_data {
unsigned int range_req_active:1;
int dhcp_sock; /* UDP socket used with the DHCP server */
#ifdef CONFIG_DPP
struct dl_list dpp_bootstrap; /* struct dpp_bootstrap_info */
int dpp_init_done;
struct dpp_authentication *dpp_auth;
u8 dpp_allowed_roles;
int dpp_qr_mutual;
int dpp_auth_ok_on_ack;
struct gas_query_ap *gas;
#ifdef CONFIG_TESTING_OPTIONS
char *dpp_config_obj_override;
char *dpp_discovery_override;
char *dpp_groups_override;
char *dpp_devices_override;
unsigned int dpp_ignore_netaccesskey_mismatch:1;
#endif /* CONFIG_TESTING_OPTIONS */
#endif /* CONFIG_DPP */
};

64
src/ap/ieee802_11.c
View File

@ -19,6 +19,7 @@
#include "common/ieee802_11_common.h"
#include "common/wpa_ctrl.h"
#include "common/sae.h"
#include "common/dpp.h"
#include "radius/radius.h"
#include "radius/radius_client.h"
#include "p2p/p2p.h"
@ -46,6 +47,8 @@
#include "rrm.h"
#include "taxonomy.h"
#include "fils_hlp.h"
#include "dpp_hostapd.h"
#include "gas_query_ap.h"
#ifdef CONFIG_FILS
@ -3451,6 +3454,37 @@ static int handle_action(struct hostapd_data *hapd,
return 1;
}
#endif /* CONFIG_IEEE80211N */
#ifdef CONFIG_DPP
if (len >= IEEE80211_HDRLEN + 6 &&
mgmt->u.action.u.vs_public_action.action ==
WLAN_PA_VENDOR_SPECIFIC &&
WPA_GET_BE24(mgmt->u.action.u.vs_public_action.oui) ==
OUI_WFA &&
mgmt->u.action.u.vs_public_action.variable[0] ==
DPP_OUI_TYPE) {
const u8 *pos, *end;
pos = &mgmt->u.action.u.vs_public_action.variable[1];
end = ((const u8 *) mgmt) + len;
hostapd_dpp_rx_action(hapd, mgmt->sa, pos, end - pos,
hapd->iface->freq);
return 1;
}
if (len >= IEEE80211_HDRLEN + 2 &&
(mgmt->u.action.u.public_action.action ==
WLAN_PA_GAS_INITIAL_RESP ||
mgmt->u.action.u.public_action.action ==
WLAN_PA_GAS_COMEBACK_RESP)) {
const u8 *pos, *end;
pos = &mgmt->u.action.u.public_action.action;
end = ((const u8 *) mgmt) + len;
gas_query_ap_rx(hapd->gas, mgmt->sa,
mgmt->u.action.category,
pos, end - pos, hapd->iface->freq);
return 1;
}
#endif /* CONFIG_DPP */
if (hapd->public_action_cb) {
hapd->public_action_cb(hapd->public_action_cb_ctx,
(u8 *) mgmt, len,
@ -3905,6 +3939,36 @@ static void handle_action_cb(struct hostapd_data *hapd,
if (is_multicast_ether_addr(mgmt->da))
return;
#ifdef CONFIG_DPP
if (len >= IEEE80211_HDRLEN + 6 &&
mgmt->u.action.category == WLAN_ACTION_PUBLIC &&
mgmt->u.action.u.vs_public_action.action ==
WLAN_PA_VENDOR_SPECIFIC &&
WPA_GET_BE24(mgmt->u.action.u.vs_public_action.oui) ==
OUI_WFA &&
mgmt->u.action.u.vs_public_action.variable[0] ==
DPP_OUI_TYPE) {
const u8 *pos, *end;
pos = &mgmt->u.action.u.vs_public_action.variable[1];
end = ((const u8 *) mgmt) + len;
hostapd_dpp_tx_status(hapd, mgmt->da, pos, end - pos, ok);
return;
}
if (len >= IEEE80211_HDRLEN + 2 &&
mgmt->u.action.category == WLAN_ACTION_PUBLIC &&
(mgmt->u.action.u.public_action.action ==
WLAN_PA_GAS_INITIAL_REQ ||
mgmt->u.action.u.public_action.action ==
WLAN_PA_GAS_COMEBACK_REQ)) {
const u8 *pos, *end;
pos = mgmt->u.action.u.public_action.variable;
end = ((const u8 *) mgmt) + len;
gas_query_ap_tx_status(hapd->gas, mgmt->da, pos, end - pos, ok);
return;
}
#endif /* CONFIG_DPP */
sta = ap_get_sta(hapd, mgmt->da);
if (!sta) {
wpa_printf(MSG_DEBUG, "handle_action_cb: STA " MACSTR

4
src/ap/sta_info.h
View File

@ -174,11 +174,11 @@ struct sta_info {
struct os_reltime sa_query_start;
#endif /* CONFIG_IEEE80211W */
#ifdef CONFIG_INTERWORKING
#if defined(CONFIG_INTERWORKING) || defined(CONFIG_DPP)
#define GAS_DIALOG_MAX 8 /* Max concurrent dialog number */
struct gas_dialog_info *gas_dialog;
u8 gas_dialog_next;
#endif /* CONFIG_INTERWORKING */
#endif /* CONFIG_INTERWORKING || CONFIG_DPP */
struct wpabuf *wps_ie; /* WPS IE from (Re)Association Request */
struct wpabuf *p2p_ie; /* P2P IE from (Re)Association Request */

4
wpa_supplicant/Android.mk
View File

@ -899,6 +899,10 @@ L_CFLAGS += -DEAP_SERVER_WSC
OBJS += src/ap/wps_hostapd.c
OBJS += src/eap_server/eap_server_wsc.c
endif
ifdef CONFIG_DPP
OBJS += src/ap/dpp_hostapd.c
OBJS += src/ap/gas_query_ap.c
endif
ifdef CONFIG_INTERWORKING
OBJS += src/ap/gas_serv.c
endif

4
wpa_supplicant/Makefile
View File

@ -941,6 +941,10 @@ CFLAGS += -DEAP_SERVER_WSC
OBJS += ../src/ap/wps_hostapd.o
OBJS += ../src/eap_server/eap_server_wsc.o
endif
ifdef CONFIG_DPP
OBJS += ../src/ap/dpp_hostapd.o
OBJS += ../src/ap/gas_query_ap.o
endif
ifdef CONFIG_INTERWORKING
OBJS += ../src/ap/gas_serv.o
endif