mirror of
https://git.kernel.org/pub/scm/network/wireless/iwd.git
synced 2024-12-22 12:42:51 +01:00
adhoc: adhoc implementation
This commit is contained in:
James Prestwood
Denis Kenzior
parent
88bd69269e
commit
55cb9aa2e9
@ -109,6 +109,7 @@ src_iwd_SOURCES = src/main.c linux/nl80211.h \
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src/eap-gtc.c \
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src/eap-pwd.c \
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src/ecc.h src/ecc.c \
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src/adhoc.h src/adhoc.c \
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$(builtin_sources)
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src_iwd_LDADD = ell/libell-internal.la -ldl
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550
src/adhoc.c
Normal file
550
src/adhoc.c
Normal file
@ -0,0 +1,550 @@
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/*
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*
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* Wireless daemon for Linux
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*
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* Copyright (C) 2018 Intel Corporation. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <ell/ell.h>
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#include "src/iwd.h"
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#include "src/device.h"
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#include "src/netdev.h"
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#include "src/wiphy.h"
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#include "src/crypto.h"
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#include "src/ie.h"
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#include "src/util.h"
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#include "src/eapol.h"
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#include "src/handshake.h"
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#include "src/mpdu.h"
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#include "src/adhoc.h"
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#include "src/dbus.h"
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struct adhoc_state {
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struct device *device;
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char *ssid;
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uint8_t pmk[32];
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struct l_queue *sta_states;
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uint32_t sta_watch_id;
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uint32_t netdev_watch_id;
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struct l_dbus_message *pending;
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bool started : 1;
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bool open : 1;
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};
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struct sta_state {
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uint8_t addr[6];
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struct adhoc_state *adhoc;
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struct eapol_sm *sm;
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struct handshake_state *hs_sta;
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struct eapol_sm *sm_a;
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struct handshake_state *hs_auth;
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bool authenticated : 1;
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};
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static void adhoc_sta_free(void *data)
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{
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struct sta_state *sta = data;
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if (sta->adhoc->open)
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goto end;
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if (sta->sm)
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eapol_sm_free(sta->sm);
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handshake_state_free(sta->hs_sta);
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if (sta->sm_a)
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eapol_sm_free(sta->sm_a);
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handshake_state_free(sta->hs_auth);
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end:
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l_free(sta);
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}
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static void adhoc_remove_sta(struct sta_state *sta)
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{
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if (!l_queue_remove(sta->adhoc->sta_states, sta)) {
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l_error("station %p was not found", sta);
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return;
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}
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/* signal station has been removed */
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if (sta->authenticated) {
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l_dbus_property_changed(dbus_get_bus(),
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device_get_path(sta->adhoc->device),
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IWD_ADHOC_INTERFACE, "ConnectedPeers");
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}
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adhoc_sta_free(sta);
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}
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static void adhoc_reset(struct adhoc_state *adhoc)
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{
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if (adhoc->pending)
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dbus_pending_reply(&adhoc->pending,
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dbus_error_aborted(adhoc->pending));
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l_free(adhoc->ssid);
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netdev_station_watch_remove(device_get_netdev(adhoc->device),
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adhoc->sta_watch_id);
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l_queue_destroy(adhoc->sta_states, adhoc_sta_free);
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adhoc->started = false;
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}
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static void adhoc_set_rsn_info(struct adhoc_state *adhoc,
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struct ie_rsn_info *rsn)
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{
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memset(rsn, 0, sizeof(*rsn));
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rsn->akm_suites = IE_RSN_AKM_SUITE_PSK;
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rsn->pairwise_ciphers = wiphy_select_cipher(
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device_get_wiphy(adhoc->device), 0xffff);
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rsn->group_cipher = IE_RSN_CIPHER_SUITE_NO_GROUP_TRAFFIC;
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}
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static bool ap_sta_match_addr(const void *a, const void *b)
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{
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const struct sta_state *sta = a;
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return !memcmp(sta->addr, b, 6);
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}
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static void adhoc_handshake_event(struct handshake_state *hs,
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enum handshake_event event, void *event_data, void *user_data)
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{
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struct sta_state *sta = user_data;
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struct adhoc_state *adhoc = sta->adhoc;
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switch (event) {
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case HANDSHAKE_EVENT_FAILED:
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l_error("handshake failed with STA "MAC, MAC_STR(sta->addr));
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/*
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* eapol frees the state machines upon handshake failure. Since
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* this is only a failure on one of the handshakes we need to
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* set the failing SM to NULL so it will not get double freed
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* by adhoc_remove_sta.
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*/
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if (sta->hs_auth == hs)
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sta->sm_a = NULL;
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else
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sta->sm = NULL;
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/* fall through */
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case HANDSHAKE_EVENT_SETTING_KEYS_FAILED:
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adhoc_remove_sta(sta);
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return;
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case HANDSHAKE_EVENT_COMPLETE:
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if ((sta->hs_auth == hs || sta->hs_sta == hs) &&
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!sta->authenticated) {
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sta->authenticated = true;
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l_dbus_property_changed(dbus_get_bus(),
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device_get_path(adhoc->device),
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IWD_ADHOC_INTERFACE, "ConnectedPeers");
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}
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break;
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default:
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break;
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}
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}
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static void adhoc_netdev_notify(struct netdev *netdev,
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enum netdev_watch_event event, void *user_data)
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{
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struct adhoc_state *ap = user_data;
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switch (event) {
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case NETDEV_WATCH_EVENT_DOWN:
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adhoc_reset(ap);
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break;
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default:
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break;
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}
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}
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static struct eapol_sm *adhoc_new_sm(struct sta_state *sta, bool authenticator)
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{
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struct netdev *netdev = device_get_netdev(sta->adhoc->device);
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struct adhoc_state *adhoc = sta->adhoc;
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const uint8_t *own_addr = netdev_get_address(netdev);
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struct ie_rsn_info rsn;
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uint8_t bss_rsne[24];
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struct handshake_state *hs;
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struct eapol_sm *sm;
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/* fill in only what handshake setup requires */
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adhoc_set_rsn_info(adhoc, &rsn);
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ie_build_rsne(&rsn, bss_rsne);
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hs = netdev_handshake_state_new(netdev);
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if (!hs) {
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l_error("could not create handshake object");
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return NULL;
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}
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handshake_state_set_event_func(hs, adhoc_handshake_event, sta);
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handshake_state_set_ssid(hs, (void *)adhoc->ssid, strlen(adhoc->ssid));
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/* we dont have the connecting peer rsn info, so just set ap == own */
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handshake_state_set_ap_rsn(hs, bss_rsne);
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handshake_state_set_own_rsn(hs, bss_rsne);
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handshake_state_set_pmk(hs, adhoc->pmk, 32);
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if (authenticator) {
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handshake_state_set_authenticator_address(hs, own_addr);
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handshake_state_set_supplicant_address(hs, sta->addr);
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} else {
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handshake_state_set_authenticator_address(hs, sta->addr);
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handshake_state_set_supplicant_address(hs, own_addr);
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}
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sm = eapol_sm_new(hs);
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if (!sm) {
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l_error("could not create sm object");
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return NULL;
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}
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eapol_sm_set_listen_interval(sm, 100);
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eapol_sm_set_protocol_version(sm, EAPOL_PROTOCOL_VERSION_2004);
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if (authenticator)
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sta->hs_auth = hs;
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else
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sta->hs_sta = hs;
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return sm;
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}
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static void adhoc_free(struct adhoc_state *adhoc)
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{
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adhoc_reset(adhoc);
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netdev_watch_remove(device_get_netdev(adhoc->device),
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adhoc->netdev_watch_id);
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l_free(adhoc);
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}
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static void adhoc_new_station(struct adhoc_state *adhoc, const uint8_t *mac)
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{
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struct sta_state *sta;
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sta = l_queue_find(adhoc->sta_states, ap_sta_match_addr, mac);
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if (sta) {
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l_warn("new station event with already connected STA");
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return;
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}
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sta = l_new(struct sta_state, 1);
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memset(sta, 0, sizeof(struct sta_state));
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memcpy(sta->addr, mac, 6);
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sta->adhoc = adhoc;
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l_queue_push_tail(adhoc->sta_states, sta);
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l_info("new Station: "MAC" adhoc=%p", MAC_STR(mac), adhoc);
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/* with open networks nothing else is required */
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if (sta->adhoc->open) {
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sta->authenticated = true;
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l_dbus_property_changed(dbus_get_bus(),
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device_get_path(adhoc->device),
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IWD_ADHOC_INTERFACE, "ConnectedPeers");
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return;
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}
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sta->sm_a = adhoc_new_sm(sta, true);
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if (!sta->sm_a) {
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l_error("could not create authenticator state machine");
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goto failed;
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}
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sta->sm = adhoc_new_sm(sta, false);
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if (!sta->sm) {
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l_error("could not create station state machine");
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goto failed;
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}
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eapol_register(sta->sm);
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eapol_register_authenticator(sta->sm_a);
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eapol_start(sta->sm);
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return;
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failed:
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adhoc_remove_sta(sta);
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}
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static void adhoc_del_station(struct adhoc_state *adhoc, const uint8_t *mac)
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{
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struct sta_state *sta;
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sta = l_queue_find(adhoc->sta_states, ap_sta_match_addr, mac);
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if (!sta) {
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l_warn("could not find station "MAC" in list", MAC_STR(mac));
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return;
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}
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l_debug("lost station "MAC, MAC_STR(mac));
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adhoc_remove_sta(sta);
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}
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static void adhoc_station_changed_cb(struct netdev *netdev,
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const uint8_t *mac, bool added, void *user_data)
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{
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struct adhoc_state *adhoc = user_data;
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if (added)
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adhoc_new_station(adhoc, mac);
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else
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adhoc_del_station(adhoc, mac);
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}
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static void adhoc_join_cb(struct netdev *netdev, int result, void *user_data)
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{
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struct adhoc_state *adhoc = user_data;
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struct l_dbus_message *reply;
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if (result < 0) {
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l_error("Failed to join adhoc network, %i", result);
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dbus_pending_reply(&adhoc->pending,
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dbus_error_failed(adhoc->pending));
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return;
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}
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adhoc->sta_watch_id = netdev_station_watch_add(netdev,
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adhoc_station_changed_cb, adhoc);
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reply = l_dbus_message_new_method_return(adhoc->pending);
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dbus_pending_reply(&adhoc->pending, reply);
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adhoc->started = true;
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}
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static struct l_dbus_message *adhoc_dbus_start(struct l_dbus *dbus,
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struct l_dbus_message *message,
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void *user_data)
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{
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struct adhoc_state *adhoc = user_data;
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struct device *device = adhoc->device;
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struct netdev *netdev = device_get_netdev(device);
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struct wiphy *wiphy = netdev_get_wiphy(netdev);
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const char *ssid, *wpa2_psk;
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struct ie_rsn_info rsn;
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struct iovec rsn_ie;
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uint8_t ie_elems[32];
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if (adhoc->pending)
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return dbus_error_busy(message);
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if (!l_dbus_message_get_arguments(message, "ss", &ssid, &wpa2_psk))
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return dbus_error_invalid_args(message);
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adhoc->ssid = l_strdup(ssid);
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adhoc->pending = l_dbus_message_ref(message);
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adhoc->sta_states = l_queue_new();
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memset(&rsn, 0, sizeof(rsn));
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rsn.akm_suites = IE_RSN_AKM_SUITE_PSK;
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rsn.pairwise_ciphers = wiphy_select_cipher(wiphy, 0xffff);
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rsn.group_cipher = IE_RSN_CIPHER_SUITE_NO_GROUP_TRAFFIC;
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ie_build_rsne(&rsn, ie_elems);
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rsn_ie.iov_base = ie_elems;
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rsn_ie.iov_len = ie_elems[1] + 2;
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if (crypto_psk_from_passphrase(wpa2_psk, (uint8_t *) ssid,
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strlen(ssid), adhoc->pmk))
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return dbus_error_invalid_args(message);
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if (netdev_join_adhoc(netdev, ssid, &rsn_ie, 1, true, adhoc_join_cb,
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adhoc))
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return dbus_error_invalid_args(message);
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return NULL;
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}
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static struct l_dbus_message *adhoc_dbus_start_open(struct l_dbus *dbus,
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struct l_dbus_message *message, void *user_data)
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{
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struct adhoc_state *adhoc = user_data;
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struct device *device = adhoc->device;
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struct netdev *netdev = device_get_netdev(device);
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const char *ssid;
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struct iovec rsn_ie;
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uint8_t ie_elems[10];
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if (adhoc->pending)
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return dbus_error_busy(message);
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if (!l_dbus_message_get_arguments(message, "s", &ssid))
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return dbus_error_invalid_args(message);
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adhoc->ssid = l_strdup(ssid);
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adhoc->pending = l_dbus_message_ref(message);
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adhoc->sta_states = l_queue_new();
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adhoc->open = true;
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/* Mac/iPhone seem to require the extended capabilities field */
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memset(ie_elems, 0, sizeof(ie_elems));
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ie_elems[0] = IE_TYPE_EXTENDED_CAPABILITIES;
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ie_elems[1] = 8;
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rsn_ie.iov_base = ie_elems;
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rsn_ie.iov_len = ie_elems[1] + 2;
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if (netdev_join_adhoc(netdev, ssid, &rsn_ie, 1, false, adhoc_join_cb,
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adhoc))
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return dbus_error_invalid_args(message);
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return NULL;
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}
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static void adhoc_leave_cb(struct netdev *netdev, int result, void *user_data)
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{
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struct adhoc_state *adhoc = user_data;
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if (result < 0) {
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l_error("Failed to leave adhoc network, %i", result);
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dbus_pending_reply(&adhoc->pending,
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dbus_error_failed(adhoc->pending));
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return;
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}
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dbus_pending_reply(&adhoc->pending,
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l_dbus_message_new_method_return(adhoc->pending));
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adhoc_reset(adhoc);
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}
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static struct l_dbus_message *adhoc_dbus_stop(struct l_dbus *dbus,
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struct l_dbus_message *message,
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void *user_data)
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{
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struct adhoc_state *adhoc = user_data;
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if (adhoc->pending)
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return dbus_error_busy(message);
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/* already stopped, no-op */
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if (!adhoc->started)
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return l_dbus_message_new_method_return(message);
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if (!netdev_leave_adhoc(device_get_netdev(adhoc->device),
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adhoc_leave_cb, adhoc))
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return dbus_error_failed(message);
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return NULL;
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}
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static void sta_append(void *data, void *user_data)
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{
|
||||
struct sta_state *sta = data;
|
||||
struct l_dbus_message_builder *builder = user_data;
|
||||
const char* macstr;
|
||||
|
||||
if (!sta->addr)
|
||||
return;
|
||||
|
||||
if (!sta->authenticated)
|
||||
return;
|
||||
|
||||
macstr = util_address_to_string(sta->addr);
|
||||
|
||||
l_dbus_message_builder_append_basic(builder, 's', macstr);
|
||||
}
|
||||
|
||||
static bool adhoc_property_get_peers(struct l_dbus *dbus,
|
||||
struct l_dbus_message *message,
|
||||
struct l_dbus_message_builder *builder,
|
||||
void *user_data)
|
||||
{
|
||||
struct adhoc_state *adhoc = user_data;
|
||||
|
||||
l_dbus_message_builder_enter_array(builder, "s");
|
||||
|
||||
l_queue_foreach(adhoc->sta_states, sta_append, builder);
|
||||
|
||||
l_dbus_message_builder_leave_array(builder);
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
static void adhoc_setup_interface(struct l_dbus_interface *interface)
|
||||
{
|
||||
l_dbus_interface_method(interface, "Start", 0, adhoc_dbus_start, "",
|
||||
"ss", "ssid", "wpa2_psk");
|
||||
l_dbus_interface_method(interface, "Stop", 0, adhoc_dbus_stop, "", "");
|
||||
l_dbus_interface_method(interface, "StartOpen", 0,
|
||||
adhoc_dbus_start_open, "", "s", "ssid");
|
||||
l_dbus_interface_property(interface, "ConnectedPeers", 0, "as",
|
||||
adhoc_property_get_peers, NULL);
|
||||
}
|
||||
|
||||
static void adhoc_destroy_interface(void *user_data)
|
||||
{
|
||||
struct adhoc_state *adhoc = user_data;
|
||||
|
||||
adhoc_free(adhoc);
|
||||
}
|
||||
|
||||
bool adhoc_init(void)
|
||||
{
|
||||
return l_dbus_register_interface(dbus_get_bus(), IWD_ADHOC_INTERFACE,
|
||||
adhoc_setup_interface, adhoc_destroy_interface, false);
|
||||
}
|
||||
|
||||
void adhoc_exit(void)
|
||||
{
|
||||
l_dbus_unregister_interface(dbus_get_bus(), IWD_ADHOC_INTERFACE);
|
||||
}
|
||||
|
||||
bool adhoc_add_interface(struct device *device)
|
||||
{
|
||||
struct adhoc_state *adhoc;
|
||||
|
||||
/* just allocate/set device, Start method will complete setup */
|
||||
adhoc = l_new(struct adhoc_state, 1);
|
||||
adhoc->device = device;
|
||||
|
||||
adhoc->netdev_watch_id = netdev_watch_add(device_get_netdev(device),
|
||||
adhoc_netdev_notify, adhoc);
|
||||
|
||||
/* setup ap dbus interface */
|
||||
return l_dbus_object_add_interface(dbus_get_bus(),
|
||||
device_get_path(device), IWD_ADHOC_INTERFACE, adhoc);
|
||||
}
|
||||
|
||||
bool adhoc_remove_interface(struct device *device)
|
||||
{
|
||||
return l_dbus_object_remove_interface(dbus_get_bus(),
|
||||
device_get_path(device), IWD_ADHOC_INTERFACE);
|
||||
}
|
||||
29
src/adhoc.h
Normal file
29
src/adhoc.h
Normal file
@ -0,0 +1,29 @@
|
||||
/*
|
||||
*
|
||||
* Wireless daemon for Linux
|
||||
*
|
||||
* Copyright (C) 2017 Intel Corporation. All rights reserved.
|
||||
*
|
||||
* This library is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Lesser General Public
|
||||
* License as published by the Free Software Foundation; either
|
||||
* version 2.1 of the License, or (at your option) any later version.
|
||||
*
|
||||
* This library is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with this library; if not, write to the Free Software
|
||||
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
*
|
||||
*/
|
||||
|
||||
struct device;
|
||||
|
||||
bool adhoc_add_interface(struct device *device);
|
||||
bool adhoc_remove_interface(struct device *device);
|
||||
|
||||
bool adhoc_init(void);
|
||||
void adhoc_exit(void);
|
||||
Loading…
Reference in New Issue
Block a user