OpenWrt – Rev 1
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/*
* 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
enum {
WPS_START_MULTI_AP,
__WPS_START_MAX
};
static const struct blobmsg_policy wps_start_policy[] = {
[WPS_START_MULTI_AP] = { "multi_ap", BLOBMSG_TYPE_BOOL },
};
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);
struct blob_attr *tb[__WPS_START_MAX], *cur;
int multi_ap = 0;
blobmsg_parse(wps_start_policy, __WPS_START_MAX, tb, blobmsg_data(msg), blobmsg_data_len(msg));
if (tb[WPS_START_MULTI_AP])
multi_ap = blobmsg_get_bool(tb[WPS_START_MULTI_AP]);
rc = wpas_wps_start_pbc(wpa_s, NULL, 0, multi_ap);
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 */