package/network/services/hostapd/src/wpa_supplicant/ubus.c

   1 /*
   2  * wpa_supplicant / ubus support
   3  * Copyright (c) 2018, Daniel Golle <daniel@makrotopia.org>
   4  * Copyright (c) 2013, Felix Fietkau <nbd@nbd.name>
   5  *
   6  * This software may be distributed under the terms of the BSD license.
   7  * See README for more details.
   8  */
   9
  10 #include "utils/includes.h"
  11 #include "utils/common.h"
  12 #include "utils/eloop.h"
  13 #include "utils/wpabuf.h"
  14 #include "common/ieee802_11_defs.h"
  15 #include "wpa_supplicant_i.h"
  16 #include "wps_supplicant.h"
  17 #include "ubus.h"
  18
  19 static struct ubus_context *ctx;
  20 static struct blob_buf b;
  21 static int ctx_ref;
  22
  23 static inline struct wpa_supplicant *get_wpas_from_object(struct ubus_object *obj)
  24 {
  25         return container_of(obj, struct wpa_supplicant, ubus.obj);
  26 }
  27
  28 static void ubus_receive(int sock, void *eloop_ctx, void *sock_ctx)
  29 {
  30         struct ubus_context *ctx = eloop_ctx;
  31         ubus_handle_event(ctx);
  32 }
  33
  34 static void ubus_reconnect_timeout(void *eloop_data, void *user_ctx)
  35 {
  36         if (ubus_reconnect(ctx, NULL)) {
  37                 eloop_register_timeout(1, 0, ubus_reconnect_timeout, ctx, NULL);
  38                 return;
  39         }
  40
  41         eloop_register_read_sock(ctx->sock.fd, ubus_receive, ctx, NULL);
  42 }
  43
  44 static void wpas_ubus_connection_lost(struct ubus_context *ctx)
  45 {
  46         eloop_unregister_read_sock(ctx->sock.fd);
  47         eloop_register_timeout(1, 0, ubus_reconnect_timeout, ctx, NULL);
  48 }
  49
  50 static bool wpas_ubus_init(void)
  51 {
  52         if (ctx)
  53                 return true;
  54
  55         ctx = ubus_connect(NULL);
  56         if (!ctx)
  57                 return false;
  58
  59         ctx->connection_lost = wpas_ubus_connection_lost;
  60         eloop_register_read_sock(ctx->sock.fd, ubus_receive, ctx, NULL);
  61         return true;
  62 }
  63
  64 static void wpas_ubus_ref_inc(void)
  65 {
  66         ctx_ref++;
  67 }
  68
  69 static void wpas_ubus_ref_dec(void)
  70 {
  71         ctx_ref--;
  72         if (!ctx)
  73                 return;
  74
  75         if (ctx_ref)
  76                 return;
  77
  78         eloop_unregister_read_sock(ctx->sock.fd);
  79         ubus_free(ctx);
  80         ctx = NULL;
  81 }
  82
  83 static int
  84 wpas_bss_get_features(struct ubus_context *ctx, struct ubus_object *obj,
  85                         struct ubus_request_data *req, const char *method,
  86                         struct blob_attr *msg)
  87 {
  88         struct wpa_supplicant *wpa_s = get_wpas_from_object(obj);
  89
  90         blob_buf_init(&b, 0);
  91         blobmsg_add_u8(&b, "ht_supported", ht_supported(wpa_s->hw.modes));
  92         blobmsg_add_u8(&b, "vht_supported", vht_supported(wpa_s->hw.modes));
  93         ubus_send_reply(ctx, req, b.head);
  94
  95         return 0;
  96 }
  97
  98 #ifdef CONFIG_WPS
  99 static int
 100 wpas_bss_wps_start(struct ubus_context *ctx, struct ubus_object *obj,
 101                         struct ubus_request_data *req, const char *method,
 102                         struct blob_attr *msg)
 103 {
 104         int rc;
 105         struct wpa_supplicant *wpa_s = get_wpas_from_object(obj);
 106
 107         rc = wpas_wps_start_pbc(wpa_s, NULL, 0);
 108
 109         if (rc != 0)
 110                 return UBUS_STATUS_NOT_SUPPORTED;
 111
 112         return 0;
 113 }
 114
 115 static int
 116 wpas_bss_wps_cancel(struct ubus_context *ctx, struct ubus_object *obj,
 117                         struct ubus_request_data *req, const char *method,
 118                         struct blob_attr *msg)
 119 {
 120         int rc;
 121         struct wpa_supplicant *wpa_s = get_wpas_from_object(obj);
 122
 123         rc = wpas_wps_cancel(wpa_s);
 124
 125         if (rc != 0)
 126                 return UBUS_STATUS_NOT_SUPPORTED;
 127
 128         return 0;
 129 }
 130 #endif
 131
 132 static const struct ubus_method bss_methods[] = {
 133 #ifdef CONFIG_WPS
 134         UBUS_METHOD_NOARG("wps_start", wpas_bss_wps_start),
 135         UBUS_METHOD_NOARG("wps_cancel", wpas_bss_wps_cancel),
 136 #endif
 137         UBUS_METHOD_NOARG("get_features", wpas_bss_get_features),
 138 };
 139
 140 static struct ubus_object_type bss_object_type =
 141         UBUS_OBJECT_TYPE("wpas_bss", bss_methods);
 142
 143 void wpas_ubus_add_bss(struct wpa_supplicant *wpa_s)
 144 {
 145         struct ubus_object *obj = &wpa_s->ubus.obj;
 146         char *name;
 147         int ret;
 148
 149         if (!wpas_ubus_init())
 150                 return;
 151
 152         if (asprintf(&name, "wpa_supplicant.%s", wpa_s->ifname) < 0)
 153                 return;
 154
 155         obj->name = name;
 156         obj->type = &bss_object_type;
 157         obj->methods = bss_object_type.methods;
 158         obj->n_methods = bss_object_type.n_methods;
 159         ret = ubus_add_object(ctx, obj);
 160         wpas_ubus_ref_inc();
 161 }
 162
 163 void wpas_ubus_free_bss(struct wpa_supplicant *wpa_s)
 164 {
 165         struct ubus_object *obj = &wpa_s->ubus.obj;
 166         char *name = (char *) obj->name;
 167
 168         if (!ctx)
 169                 return;
 170
 171         if (obj->id) {
 172                 ubus_remove_object(ctx, obj);
 173                 wpas_ubus_ref_dec();
 174         }
 175
 176         free(name);
 177 }
 178
 179 #ifdef CONFIG_WPS
 180 void wpas_ubus_notify(struct wpa_supplicant *wpa_s, const struct wps_credential *cred)
 181 {
 182         u16 auth_type;
 183         char *ifname, *encryption, *ssid, *key;
 184         size_t ifname_len;
 185
 186         if (!cred)
 187                 return;
 188
 189         auth_type = cred->auth_type;
 190
 191         if (auth_type == (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK))
 192                 auth_type = WPS_AUTH_WPA2PSK;
 193
 194         if (auth_type != WPS_AUTH_OPEN &&
 195             auth_type != WPS_AUTH_WPAPSK &&
 196             auth_type != WPS_AUTH_WPA2PSK) {
 197                 wpa_printf(MSG_DEBUG, "WPS: Ignored credentials for "
 198                            "unsupported authentication type 0x%x",
 199                            auth_type);
 200                 return;
 201         }
 202
 203         if (auth_type == WPS_AUTH_WPAPSK || auth_type == WPS_AUTH_WPA2PSK) {
 204                 if (cred->key_len < 8 || cred->key_len > 2 * PMK_LEN) {
 205                         wpa_printf(MSG_ERROR, "WPS: Reject PSK credential with "
 206                                    "invalid Network Key length %lu",
 207                                    (unsigned long) cred->key_len);
 208                         return;
 209                 }
 210         }
 211
 212         blob_buf_init(&b, 0);
 213
 214         ifname_len = strlen(wpa_s->ifname);
 215         ifname = blobmsg_alloc_string_buffer(&b, "ifname", ifname_len + 1);
 216         memcpy(ifname, wpa_s->ifname, ifname_len + 1);
 217         ifname[ifname_len] = '\0';
 218         blobmsg_add_string_buffer(&b);
 219
 220         switch (auth_type) {
 221                 case WPS_AUTH_WPA2PSK:
 222                         encryption = "psk2";
 223                         break;
 224                 case WPS_AUTH_WPAPSK:
 225                         encryption = "psk";
 226                         break;
 227                 default:
 228                         encryption = "none";
 229                         break;
 230         }
 231
 232         blobmsg_add_string(&b, "encryption", encryption);
 233
 234         ssid = blobmsg_alloc_string_buffer(&b, "ssid", cred->ssid_len + 1);
 235         memcpy(ssid, cred->ssid, cred->ssid_len);
 236         ssid[cred->ssid_len] = '\0';
 237         blobmsg_add_string_buffer(&b);
 238
 239         if (cred->key_len > 0) {
 240                 key = blobmsg_alloc_string_buffer(&b, "key", cred->key_len + 1);
 241                 memcpy(key, cred->key, cred->key_len);
 242                 key[cred->key_len] = '\0';
 243                 blobmsg_add_string_buffer(&b);
 244         }
 245
 246 //      ubus_notify(ctx, &wpa_s->ubus.obj, "wps_credentials", b.head, -1);
 247         ubus_send_event(ctx, "wps_credentials", b.head);
 248 }
 249 #endif /* CONFIG_WPS */