hostapd: add support for WPS pushbutton station

similar to hostapd, also add a ubus interface for wpa_supplicant
which will allow handling WPS push-button just as it works for hostapd.
In order to have wpa_supplicant running without any network
configuration (so you can use it to retrieve credentials via WPS),
configure wifi-iface in /etc/config/wireless:

  config wifi-iface 'default_radio0'
      option device 'radio0'
      option network 'wwan'
      option mode 'sta'
      option encryption 'wps'

This section will automatically be edited if credentials have
successfully been acquired via WPS.

Size difference (mips_24kc): roughly +4kb for the 'full' variants of
wpa_supplicant and wpad which do support WPS.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
This commit is contained in:
Daniel Golle 2018-11-22 20:53:09 +01:00
parent 5beedcddc3
commit f5753aae23
10 changed files with 468 additions and 15 deletions

View File

@ -7,7 +7,7 @@
include $(TOPDIR)/rules.mk
PKG_NAME:=hostapd
PKG_RELEASE:=6
PKG_RELEASE:=7
PKG_SOURCE_URL:=http://w1.fi/hostap.git
PKG_SOURCE_PROTO:=git
@ -296,7 +296,7 @@ define Package/wpa-supplicant/Default
CATEGORY:=Network
TITLE:=WPA Supplicant
URL:=http://hostap.epitest.fi/wpa_supplicant/
DEPENDS:=$(DRV_DEPENDS)
DEPENDS:=$(DRV_DEPENDS) +hostapd-common +libubus
PROVIDES:=wpa-supplicant
CONFLICTS:=$(SUPPLICANT_PROVIDERS)
SUPPLICANT_PROVIDERS+=$(1)
@ -444,10 +444,7 @@ TARGET_CPPFLAGS := \
$(if $(CONFIG_WPA_MSG_MIN_PRIORITY),-DCONFIG_MSG_MIN_PRIORITY=$(CONFIG_WPA_MSG_MIN_PRIORITY))
TARGET_CFLAGS += -ffunction-sections -fdata-sections -flto
TARGET_LDFLAGS += -Wl,--gc-sections -flto=jobserver -fuse-linker-plugin
ifeq ($(findstring supplicant,$(BUILD_VARIANT)),)
TARGET_LDFLAGS += -lubox -lubus
endif
TARGET_LDFLAGS += -Wl,--gc-sections -flto=jobserver -fuse-linker-plugin -lubox -lubus
ifdef CONFIG_PACKAGE_kmod-cfg80211
TARGET_LDFLAGS += -lm -lnl-tiny
@ -534,8 +531,9 @@ define Install/supplicant
endef
define Package/hostapd-common/install
$(INSTALL_DIR) $(1)/lib/netifd
$(INSTALL_DIR) $(1)/lib/netifd $(1)/etc/rc.button
$(INSTALL_DATA) ./files/hostapd.sh $(1)/lib/netifd/hostapd.sh
$(INSTALL_BIN) ./files/wps-hotplug.sh $(1)/etc/rc.button/wps
endef
define Package/hostapd/install
@ -549,9 +547,8 @@ Package/hostapd-wolfssl/install = $(Package/hostapd/install)
ifneq ($(LOCAL_TYPE),supplicant)
define Package/hostapd-utils/install
$(INSTALL_DIR) $(1)/usr/sbin $(1)/etc/rc.button
$(INSTALL_DIR) $(1)/usr/sbin
$(INSTALL_BIN) $(PKG_BUILD_DIR)/hostapd/hostapd_cli $(1)/usr/sbin/
$(INSTALL_BIN) ./files/wps-hotplug.sh $(1)/etc/rc.button/wps
endef
endif

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@ -762,6 +762,9 @@ wpa_supplicant_add_network() {
hostapd_append_wep_key network_data
append network_data "wep_tx_keyidx=$wep_keyidx" "$N$T"
;;
wps)
key_mgmt='WPS'
;;
psk|sae|psk-sae)
local passphrase
@ -869,7 +872,10 @@ wpa_supplicant_add_network() {
append network_data "mcast_rate=$mc_rate" "$N$T"
}
cat >> "$_config" <<EOF
if [ "$key_mgnt" = "WPS" ]; then
echo "wps_cred_processing=1" >> "$_config"
else
cat >> "$_config" <<EOF
network={
$scan_ssid
ssid="$ssid"
@ -877,6 +883,7 @@ network={
$network_data
}
EOF
fi
return 0
}

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@ -591,3 +591,8 @@ CONFIG_NO_RANDOM_POOL=y
# Opportunistic Wireless Encryption (OWE)
# Experimental implementation of draft-harkins-owe-07.txt
#CONFIG_OWE=y
# uBus IPC/RPC System
# Services can connect to the bus and provide methods
# that can be called by other services or clients.
CONFIG_UBUS=y

View File

@ -593,3 +593,8 @@ CONFIG_IBSS_RSN=y
# Opportunistic Wireless Encryption (OWE)
# Experimental implementation of draft-harkins-owe-07.txt
#CONFIG_OWE=y
# uBus IPC/RPC System
# Services can connect to the bus and provide methods
# that can be called by other services or clients.
CONFIG_UBUS=y

View File

@ -593,3 +593,8 @@ CONFIG_NO_RANDOM_POOL=y
# Opportunistic Wireless Encryption (OWE)
# Experimental implementation of draft-harkins-owe-07.txt
#CONFIG_OWE=y
# uBus IPC/RPC System
# Services can connect to the bus and provide methods
# that can be called by other services or clients.
CONFIG_UBUS=y

View File

@ -593,3 +593,8 @@ CONFIG_IBSS_RSN=y
# Opportunistic Wireless Encryption (OWE)
# Experimental implementation of draft-harkins-owe-07.txt
#CONFIG_OWE=y
# uBus IPC/RPC System
# Services can connect to the bus and provide methods
# that can be called by other services or clients.
CONFIG_UBUS=y

View File

@ -1,11 +1,56 @@
#!/bin/sh
if [ "$ACTION" = "pressed" -a "$BUTTON" = "wps" ]; then
cd /var/run/hostapd
for socket in *; do
[ -S "$socket" ] || continue
hostapd_cli -i "$socket" wps_pbc
wps_catch_credentials() {
local iface ifaces ifc ifname ssid encryption key radio radios
local found=0
. /usr/share/libubox/jshn.sh
ubus -S -t 30 listen wps_credentials | while read creds; do
json_init
json_load "$creds"
json_select wps_credentials || continue
json_get_vars ifname ssid key encryption
local ifcname="$ifname"
json_init
json_load "$(ubus -S call network.wireless status)"
json_get_keys radios
for radio in $radios; do
json_select $radio
json_select interfaces
json_get_keys ifaces
for ifc in $ifaces; do
json_select $ifc
json_get_vars ifname
[ "$ifname" = "$ifcname" ] && {
ubus -S call uci set "{\"config\":\"wireless\", \"type\":\"wifi-iface\", \
\"match\": { \"device\": \"$radio\", \"encryption\": \"wps\" }, \
\"values\": { \"encryption\": \"$encryption\", \
\"ssid\": \"$ssid\", \
\"key\": \"$key\" } }"
ubus -S call uci commit '{"config": "wireless"}'
ubus -S call uci apply
}
json_select ..
done
json_select ..
json_select ..
done
done
}
if [ "$ACTION" = "pressed" -a "$BUTTON" = "wps" ]; then
wps_done=0
ubusobjs="$( ubus -S list hostapd.* )"
for ubusobj in $ubusobjs; do
ubus -S call $ubusobj wps_start && wps_done=1
done
[ $wps_done = 0 ] || return 0
wps_done=0
ubusobjs="$( ubus -S list wpa_supplicant.* )"
for ubusobj in $ubusobjs; do
ubus -S call $ubusobj wps_start && wps_done=1
done
[ $wps_done = 0 ] || wps_catch_credentials &
fi
return 0

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@ -341,3 +341,85 @@
}
--- a/wpa_supplicant/Makefile
+++ b/wpa_supplicant/Makefile
@@ -189,6 +189,12 @@ ifdef CONFIG_EAPOL_TEST
CFLAGS += -Werror -DEAPOL_TEST
endif
+ifdef CONFIG_UBUS
+CFLAGS += -DUBUS_SUPPORT
+OBJS += ubus.o
+LIBS += -lubox -lubus
+endif
+
ifdef CONFIG_CODE_COVERAGE
CFLAGS += -O0 -fprofile-arcs -ftest-coverage
LIBS += -lgcov
@@ -915,6 +921,9 @@ endif
ifdef CONFIG_IEEE80211AX
OBJS += ../src/ap/ieee802_11_he.o
endif
+ifdef CONFIG_UBUS
+OBJS += ../src/ap/ubus.o
+endif
endif
ifdef CONFIG_WNM_AP
CFLAGS += -DCONFIG_WNM_AP
--- a/wpa_supplicant/wpa_supplicant.c
+++ b/wpa_supplicant/wpa_supplicant.c
@@ -5998,6 +5998,8 @@ struct wpa_supplicant * wpa_supplicant_a
}
#endif /* CONFIG_P2P */
+ wpas_ubus_add_bss(wpa_s);
+
return wpa_s;
}
@@ -6024,6 +6026,8 @@ int wpa_supplicant_remove_iface(struct w
struct wpa_supplicant *parent = wpa_s->parent;
#endif /* CONFIG_MESH */
+ wpas_ubus_free_bss(wpa_s);
+
/* Remove interface from the global list of interfaces */
prev = global->ifaces;
if (prev == wpa_s) {
--- a/wpa_supplicant/wpa_supplicant_i.h
+++ b/wpa_supplicant/wpa_supplicant_i.h
@@ -17,6 +17,7 @@
#include "wps/wps_defs.h"
#include "config_ssid.h"
#include "wmm_ac.h"
+#include "ubus.h"
extern const char *const wpa_supplicant_version;
extern const char *const wpa_supplicant_license;
@@ -500,6 +501,7 @@ struct wpa_supplicant {
unsigned char own_addr[ETH_ALEN];
unsigned char perm_addr[ETH_ALEN];
char ifname[100];
+ struct wpas_ubus_bss ubus;
#ifdef CONFIG_MATCH_IFACE
int matched;
#endif /* CONFIG_MATCH_IFACE */
--- a/wpa_supplicant/wps_supplicant.c
+++ b/wpa_supplicant/wps_supplicant.c
@@ -33,6 +33,7 @@
#include "p2p/p2p.h"
#include "p2p_supplicant.h"
#include "wps_supplicant.h"
+#include "ubus.h"
#ifndef WPS_PIN_SCAN_IGNORE_SEL_REG
@@ -388,6 +389,8 @@ static int wpa_supplicant_wps_cred(void
wpa_hexdump_key(MSG_DEBUG, "WPS: Received Credential attribute",
cred->cred_attr, cred->cred_attr_len);
+ wpas_ubus_notify(wpa_s, cred);
+
if (wpa_s->conf->wps_cred_processing == 1)
return 0;

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@ -0,0 +1,249 @@
/*
* wpa_supplicant / ubus support
* Copyright (c) 2018, Daniel Golle <daniel@makrotopia.org>
* Copyright (c) 2013, Felix Fietkau <nbd@nbd.name>
*
* 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 "utils/wpabuf.h"
#include "common/ieee802_11_defs.h"
#include "wpa_supplicant_i.h"
#include "wps_supplicant.h"
#include "ubus.h"
static struct ubus_context *ctx;
static struct blob_buf b;
static int ctx_ref;
static inline struct wpa_supplicant *get_wpas_from_object(struct ubus_object *obj)
{
return container_of(obj, struct wpa_supplicant, ubus.obj);
}
static void ubus_receive(int sock, void *eloop_ctx, void *sock_ctx)
{
struct ubus_context *ctx = eloop_ctx;
ubus_handle_event(ctx);
}
static void ubus_reconnect_timeout(void *eloop_data, void *user_ctx)
{
if (ubus_reconnect(ctx, NULL)) {
eloop_register_timeout(1, 0, ubus_reconnect_timeout, ctx, NULL);
return;
}
eloop_register_read_sock(ctx->sock.fd, ubus_receive, ctx, NULL);
}
static void wpas_ubus_connection_lost(struct ubus_context *ctx)
{
eloop_unregister_read_sock(ctx->sock.fd);
eloop_register_timeout(1, 0, ubus_reconnect_timeout, ctx, NULL);
}
static bool wpas_ubus_init(void)
{
if (ctx)
return true;
ctx = ubus_connect(NULL);
if (!ctx)
return false;
ctx->connection_lost = wpas_ubus_connection_lost;
eloop_register_read_sock(ctx->sock.fd, ubus_receive, ctx, NULL);
return true;
}
static void wpas_ubus_ref_inc(void)
{
ctx_ref++;
}
static void wpas_ubus_ref_dec(void)
{
ctx_ref--;
if (!ctx)
return;
if (ctx_ref)
return;
eloop_unregister_read_sock(ctx->sock.fd);
ubus_free(ctx);
ctx = NULL;
}
static int
wpas_bss_get_features(struct ubus_context *ctx, struct ubus_object *obj,
struct ubus_request_data *req, const char *method,
struct blob_attr *msg)
{
struct wpa_supplicant *wpa_s = get_wpas_from_object(obj);
blob_buf_init(&b, 0);
blobmsg_add_u8(&b, "ht_supported", ht_supported(wpa_s->hw.modes));
blobmsg_add_u8(&b, "vht_supported", vht_supported(wpa_s->hw.modes));
ubus_send_reply(ctx, req, b.head);
return 0;
}
#ifdef CONFIG_WPS
static int
wpas_bss_wps_start(struct ubus_context *ctx, struct ubus_object *obj,
struct ubus_request_data *req, const char *method,
struct blob_attr *msg)
{
int rc;
struct wpa_supplicant *wpa_s = get_wpas_from_object(obj);
rc = wpas_wps_start_pbc(wpa_s, NULL, 0);
if (rc != 0)
return UBUS_STATUS_NOT_SUPPORTED;
return 0;
}
static int
wpas_bss_wps_cancel(struct ubus_context *ctx, struct ubus_object *obj,
struct ubus_request_data *req, const char *method,
struct blob_attr *msg)
{
int rc;
struct wpa_supplicant *wpa_s = get_wpas_from_object(obj);
rc = wpas_wps_cancel(wpa_s);
if (rc != 0)
return UBUS_STATUS_NOT_SUPPORTED;
return 0;
}
#endif
static const struct ubus_method bss_methods[] = {
#ifdef CONFIG_WPS
UBUS_METHOD_NOARG("wps_start", wpas_bss_wps_start),
UBUS_METHOD_NOARG("wps_cancel", wpas_bss_wps_cancel),
#endif
UBUS_METHOD_NOARG("get_features", wpas_bss_get_features),
};
static struct ubus_object_type bss_object_type =
UBUS_OBJECT_TYPE("wpas_bss", bss_methods);
void wpas_ubus_add_bss(struct wpa_supplicant *wpa_s)
{
struct ubus_object *obj = &wpa_s->ubus.obj;
char *name;
int ret;
if (!wpas_ubus_init())
return;
if (asprintf(&name, "wpa_supplicant.%s", wpa_s->ifname) < 0)
return;
obj->name = name;
obj->type = &bss_object_type;
obj->methods = bss_object_type.methods;
obj->n_methods = bss_object_type.n_methods;
ret = ubus_add_object(ctx, obj);
wpas_ubus_ref_inc();
}
void wpas_ubus_free_bss(struct wpa_supplicant *wpa_s)
{
struct ubus_object *obj = &wpa_s->ubus.obj;
char *name = (char *) obj->name;
if (!ctx)
return;
if (obj->id) {
ubus_remove_object(ctx, obj);
wpas_ubus_ref_dec();
}
free(name);
}
#ifdef CONFIG_WPS
void wpas_ubus_notify(struct wpa_supplicant *wpa_s, const struct wps_credential *cred)
{
u16 auth_type;
char *ifname, *encryption, *ssid, *key;
size_t ifname_len;
if (!cred)
return;
auth_type = cred->auth_type;
if (auth_type == (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK))
auth_type = WPS_AUTH_WPA2PSK;
if (auth_type != WPS_AUTH_OPEN &&
auth_type != WPS_AUTH_WPAPSK &&
auth_type != WPS_AUTH_WPA2PSK) {
wpa_printf(MSG_DEBUG, "WPS: Ignored credentials for "
"unsupported authentication type 0x%x",
auth_type);
return;
}
if (auth_type == WPS_AUTH_WPAPSK || auth_type == WPS_AUTH_WPA2PSK) {
if (cred->key_len < 8 || cred->key_len > 2 * PMK_LEN) {
wpa_printf(MSG_ERROR, "WPS: Reject PSK credential with "
"invalid Network Key length %lu",
(unsigned long) cred->key_len);
return;
}
}
blob_buf_init(&b, 0);
ifname_len = strlen(wpa_s->ifname);
ifname = blobmsg_alloc_string_buffer(&b, "ifname", ifname_len + 1);
memcpy(ifname, wpa_s->ifname, ifname_len + 1);
ifname[ifname_len] = '\0';
blobmsg_add_string_buffer(&b);
switch (auth_type) {
case WPS_AUTH_WPA2PSK:
encryption = "psk2";
break;
case WPS_AUTH_WPAPSK:
encryption = "psk";
break;
default:
encryption = "none";
break;
}
blobmsg_add_string(&b, "encryption", encryption);
ssid = blobmsg_alloc_string_buffer(&b, "ssid", cred->ssid_len + 1);
memcpy(ssid, cred->ssid, cred->ssid_len);
ssid[cred->ssid_len] = '\0';
blobmsg_add_string_buffer(&b);
if (cred->key_len > 0) {
key = blobmsg_alloc_string_buffer(&b, "key", cred->key_len + 1);
memcpy(key, cred->key, cred->key_len);
key[cred->key_len] = '\0';
blobmsg_add_string_buffer(&b);
}
// ubus_notify(ctx, &wpa_s->ubus.obj, "wps_credentials", b.head, -1);
ubus_send_event(ctx, "wps_credentials", b.head);
}
#endif /* CONFIG_WPS */

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@ -0,0 +1,53 @@
/*
* wpa_supplicant / ubus support
* Copyright (c) 2018, Daniel Golle <daniel@makrotopia.org>
* Copyright (c) 2013, Felix Fietkau <nbd@nbd.name>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#ifndef __WPAS_UBUS_H
#define __WPAS_UBUS_H
struct wpa_supplicant;
#include "wps_supplicant.h"
#ifdef UBUS_SUPPORT
#include <libubus.h>
struct wpas_ubus_bss {
struct ubus_object obj;
};
void wpas_ubus_add_bss(struct wpa_supplicant *wpa_s);
void wpas_ubus_free_bss(struct wpa_supplicant *wpa_s);
#ifdef CONFIG_WPS
void wpas_ubus_notify(struct wpa_supplicant *wpa_s, const struct wps_credential *cred);
#endif
#else
struct wpas_ubus_bss {};
static inline void wpas_ubus_add_iface(struct wpa_supplicant *wpa_s)
{
}
static inline void wpas_ubus_free_iface(struct wpa_supplicant *wpa_s)
{
}
static inline void wpas_ubus_add_bss(struct wpa_supplicant *wpa_s)
{
}
static inline void wpas_ubus_free_bss(struct wpa_supplicant *wpa_s)
{
}
static inline void wpas_ubus_notify(struct wpa_supplicant *wpa_s, struct wps_credential *cred)
{
}
#endif
#endif