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
249
package/network/services/hostapd/src/wpa_supplicant/ubus.c
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249
package/network/services/hostapd/src/wpa_supplicant/ubus.c
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@@ -0,0 +1,249 @@
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/*
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* wpa_supplicant / ubus support
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* Copyright (c) 2018, Daniel Golle <daniel@makrotopia.org>
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* Copyright (c) 2013, Felix Fietkau <nbd@nbd.name>
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*
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* This software may be distributed under the terms of the BSD license.
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* See README for more details.
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*/
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#include "utils/includes.h"
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#include "utils/common.h"
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#include "utils/eloop.h"
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#include "utils/wpabuf.h"
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#include "common/ieee802_11_defs.h"
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#include "wpa_supplicant_i.h"
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#include "wps_supplicant.h"
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#include "ubus.h"
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static struct ubus_context *ctx;
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static struct blob_buf b;
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static int ctx_ref;
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static inline struct wpa_supplicant *get_wpas_from_object(struct ubus_object *obj)
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{
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return container_of(obj, struct wpa_supplicant, ubus.obj);
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}
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static void ubus_receive(int sock, void *eloop_ctx, void *sock_ctx)
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{
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struct ubus_context *ctx = eloop_ctx;
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ubus_handle_event(ctx);
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}
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static void ubus_reconnect_timeout(void *eloop_data, void *user_ctx)
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{
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if (ubus_reconnect(ctx, NULL)) {
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eloop_register_timeout(1, 0, ubus_reconnect_timeout, ctx, NULL);
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return;
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}
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eloop_register_read_sock(ctx->sock.fd, ubus_receive, ctx, NULL);
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}
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static void wpas_ubus_connection_lost(struct ubus_context *ctx)
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{
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eloop_unregister_read_sock(ctx->sock.fd);
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eloop_register_timeout(1, 0, ubus_reconnect_timeout, ctx, NULL);
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}
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static bool wpas_ubus_init(void)
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{
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if (ctx)
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return true;
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ctx = ubus_connect(NULL);
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if (!ctx)
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return false;
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ctx->connection_lost = wpas_ubus_connection_lost;
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eloop_register_read_sock(ctx->sock.fd, ubus_receive, ctx, NULL);
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return true;
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}
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static void wpas_ubus_ref_inc(void)
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{
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ctx_ref++;
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}
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static void wpas_ubus_ref_dec(void)
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{
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ctx_ref--;
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if (!ctx)
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return;
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if (ctx_ref)
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return;
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eloop_unregister_read_sock(ctx->sock.fd);
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ubus_free(ctx);
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ctx = NULL;
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}
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static int
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wpas_bss_get_features(struct ubus_context *ctx, struct ubus_object *obj,
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struct ubus_request_data *req, const char *method,
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struct blob_attr *msg)
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{
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struct wpa_supplicant *wpa_s = get_wpas_from_object(obj);
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blob_buf_init(&b, 0);
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blobmsg_add_u8(&b, "ht_supported", ht_supported(wpa_s->hw.modes));
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blobmsg_add_u8(&b, "vht_supported", vht_supported(wpa_s->hw.modes));
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ubus_send_reply(ctx, req, b.head);
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return 0;
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}
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#ifdef CONFIG_WPS
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static int
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wpas_bss_wps_start(struct ubus_context *ctx, struct ubus_object *obj,
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struct ubus_request_data *req, const char *method,
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struct blob_attr *msg)
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{
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int rc;
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struct wpa_supplicant *wpa_s = get_wpas_from_object(obj);
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rc = wpas_wps_start_pbc(wpa_s, NULL, 0);
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if (rc != 0)
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return UBUS_STATUS_NOT_SUPPORTED;
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return 0;
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}
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static int
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wpas_bss_wps_cancel(struct ubus_context *ctx, struct ubus_object *obj,
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struct ubus_request_data *req, const char *method,
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struct blob_attr *msg)
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{
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int rc;
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struct wpa_supplicant *wpa_s = get_wpas_from_object(obj);
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rc = wpas_wps_cancel(wpa_s);
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if (rc != 0)
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return UBUS_STATUS_NOT_SUPPORTED;
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return 0;
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}
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#endif
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static const struct ubus_method bss_methods[] = {
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#ifdef CONFIG_WPS
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UBUS_METHOD_NOARG("wps_start", wpas_bss_wps_start),
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UBUS_METHOD_NOARG("wps_cancel", wpas_bss_wps_cancel),
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#endif
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UBUS_METHOD_NOARG("get_features", wpas_bss_get_features),
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};
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static struct ubus_object_type bss_object_type =
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UBUS_OBJECT_TYPE("wpas_bss", bss_methods);
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void wpas_ubus_add_bss(struct wpa_supplicant *wpa_s)
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{
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struct ubus_object *obj = &wpa_s->ubus.obj;
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char *name;
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int ret;
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if (!wpas_ubus_init())
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return;
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if (asprintf(&name, "wpa_supplicant.%s", wpa_s->ifname) < 0)
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return;
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obj->name = name;
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obj->type = &bss_object_type;
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obj->methods = bss_object_type.methods;
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obj->n_methods = bss_object_type.n_methods;
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ret = ubus_add_object(ctx, obj);
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wpas_ubus_ref_inc();
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}
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void wpas_ubus_free_bss(struct wpa_supplicant *wpa_s)
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{
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struct ubus_object *obj = &wpa_s->ubus.obj;
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char *name = (char *) obj->name;
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if (!ctx)
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return;
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if (obj->id) {
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ubus_remove_object(ctx, obj);
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wpas_ubus_ref_dec();
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}
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free(name);
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}
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#ifdef CONFIG_WPS
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void wpas_ubus_notify(struct wpa_supplicant *wpa_s, const struct wps_credential *cred)
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{
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u16 auth_type;
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char *ifname, *encryption, *ssid, *key;
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size_t ifname_len;
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if (!cred)
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return;
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auth_type = cred->auth_type;
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if (auth_type == (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK))
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auth_type = WPS_AUTH_WPA2PSK;
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if (auth_type != WPS_AUTH_OPEN &&
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auth_type != WPS_AUTH_WPAPSK &&
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auth_type != WPS_AUTH_WPA2PSK) {
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wpa_printf(MSG_DEBUG, "WPS: Ignored credentials for "
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"unsupported authentication type 0x%x",
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auth_type);
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return;
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}
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if (auth_type == WPS_AUTH_WPAPSK || auth_type == WPS_AUTH_WPA2PSK) {
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if (cred->key_len < 8 || cred->key_len > 2 * PMK_LEN) {
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wpa_printf(MSG_ERROR, "WPS: Reject PSK credential with "
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"invalid Network Key length %lu",
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(unsigned long) cred->key_len);
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return;
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}
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}
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blob_buf_init(&b, 0);
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ifname_len = strlen(wpa_s->ifname);
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ifname = blobmsg_alloc_string_buffer(&b, "ifname", ifname_len + 1);
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memcpy(ifname, wpa_s->ifname, ifname_len + 1);
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ifname[ifname_len] = '\0';
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blobmsg_add_string_buffer(&b);
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switch (auth_type) {
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case WPS_AUTH_WPA2PSK:
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encryption = "psk2";
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break;
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case WPS_AUTH_WPAPSK:
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encryption = "psk";
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break;
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default:
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encryption = "none";
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break;
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}
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blobmsg_add_string(&b, "encryption", encryption);
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ssid = blobmsg_alloc_string_buffer(&b, "ssid", cred->ssid_len + 1);
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memcpy(ssid, cred->ssid, cred->ssid_len);
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ssid[cred->ssid_len] = '\0';
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blobmsg_add_string_buffer(&b);
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if (cred->key_len > 0) {
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key = blobmsg_alloc_string_buffer(&b, "key", cred->key_len + 1);
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memcpy(key, cred->key, cred->key_len);
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key[cred->key_len] = '\0';
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blobmsg_add_string_buffer(&b);
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}
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// ubus_notify(ctx, &wpa_s->ubus.obj, "wps_credentials", b.head, -1);
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ubus_send_event(ctx, "wps_credentials", b.head);
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}
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#endif /* CONFIG_WPS */
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53
package/network/services/hostapd/src/wpa_supplicant/ubus.h
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53
package/network/services/hostapd/src/wpa_supplicant/ubus.h
Normal file
@@ -0,0 +1,53 @@
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/*
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* wpa_supplicant / ubus support
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* Copyright (c) 2018, Daniel Golle <daniel@makrotopia.org>
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* Copyright (c) 2013, Felix Fietkau <nbd@nbd.name>
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*
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* This software may be distributed under the terms of the BSD license.
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* See README for more details.
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*/
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#ifndef __WPAS_UBUS_H
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#define __WPAS_UBUS_H
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struct wpa_supplicant;
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#include "wps_supplicant.h"
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#ifdef UBUS_SUPPORT
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#include <libubus.h>
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struct wpas_ubus_bss {
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struct ubus_object obj;
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};
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void wpas_ubus_add_bss(struct wpa_supplicant *wpa_s);
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void wpas_ubus_free_bss(struct wpa_supplicant *wpa_s);
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#ifdef CONFIG_WPS
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void wpas_ubus_notify(struct wpa_supplicant *wpa_s, const struct wps_credential *cred);
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#endif
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#else
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struct wpas_ubus_bss {};
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static inline void wpas_ubus_add_iface(struct wpa_supplicant *wpa_s)
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{
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}
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static inline void wpas_ubus_free_iface(struct wpa_supplicant *wpa_s)
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{
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}
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static inline void wpas_ubus_add_bss(struct wpa_supplicant *wpa_s)
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{
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}
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static inline void wpas_ubus_free_bss(struct wpa_supplicant *wpa_s)
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{
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}
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static inline void wpas_ubus_notify(struct wpa_supplicant *wpa_s, struct wps_credential *cred)
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{
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}
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#endif
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#endif
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