hostap/wpa_supplicant/preauth_test.c
Jouni Malinen 3e2ad1b932 Fixed race condition between disassociation event and group key handshake
This avoids getting stuck in state where wpa_supplicant has canceled scans,
but the driver is actually in disassociated state. The previously used code
that controlled scan timeout from WPA module is not really needed anymore
(and has not been needed for past four years since authentication timeout
was separated from scan request timeout), so this can simply be removed to
resolved the race condition. As an extra bonus, this simplifies the
interface to WPA module.
[Bug 261]
2008-06-09 16:26:47 +03:00

375 lines
8.8 KiB
C

/*
* WPA Supplicant - test code for pre-authentication
* Copyright (c) 2003-2007, Jouni Malinen <j@w1.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Alternatively, this software may be distributed under the terms of BSD
* license.
*
* See README and COPYING for more details.
*
* IEEE 802.1X Supplicant test code (to be used in place of wpa_supplicant.c.
* Not used in production version.
*/
#include "includes.h"
#include <assert.h>
#include "common.h"
#include "config.h"
#include "eapol_supp/eapol_supp_sm.h"
#include "eloop.h"
#include "wpa.h"
#include "eap_peer/eap.h"
#include "wpa_supplicant_i.h"
#include "l2_packet/l2_packet.h"
#include "ctrl_iface.h"
#include "pcsc_funcs.h"
#include "preauth.h"
#include "pmksa_cache.h"
extern int wpa_debug_level;
extern int wpa_debug_show_keys;
struct wpa_driver_ops *wpa_supplicant_drivers[] = { NULL };
struct preauth_test_data {
int auth_timed_out;
};
static void _wpa_supplicant_disassociate(void *wpa_s, int reason_code)
{
wpa_supplicant_disassociate(wpa_s, reason_code);
}
static void _wpa_supplicant_deauthenticate(void *wpa_s, int reason_code)
{
wpa_supplicant_deauthenticate(wpa_s, reason_code);
}
static u8 * wpa_alloc_eapol(const struct wpa_supplicant *wpa_s, u8 type,
const void *data, u16 data_len,
size_t *msg_len, void **data_pos)
{
struct ieee802_1x_hdr *hdr;
*msg_len = sizeof(*hdr) + data_len;
hdr = os_malloc(*msg_len);
if (hdr == NULL)
return NULL;
hdr->version = wpa_s->conf->eapol_version;
hdr->type = type;
hdr->length = htons(data_len);
if (data)
os_memcpy(hdr + 1, data, data_len);
else
os_memset(hdr + 1, 0, data_len);
if (data_pos)
*data_pos = hdr + 1;
return (u8 *) hdr;
}
static u8 * _wpa_alloc_eapol(void *wpa_s, u8 type,
const void *data, u16 data_len,
size_t *msg_len, void **data_pos)
{
return wpa_alloc_eapol(wpa_s, type, data, data_len, msg_len, data_pos);
}
static void _wpa_supplicant_set_state(void *ctx, wpa_states state)
{
struct wpa_supplicant *wpa_s = ctx;
wpa_s->wpa_state = state;
}
static wpa_states _wpa_supplicant_get_state(void *ctx)
{
struct wpa_supplicant *wpa_s = ctx;
return wpa_s->wpa_state;
}
static int wpa_ether_send(void *wpa_s, const u8 *dest, u16 proto,
const u8 *buf, size_t len)
{
printf("%s - not implemented\n", __func__);
return -1;
}
static void * wpa_supplicant_get_network_ctx(void *wpa_s)
{
return wpa_supplicant_get_ssid(wpa_s);
}
static void _wpa_supplicant_cancel_auth_timeout(void *wpa_s)
{
wpa_supplicant_cancel_auth_timeout(wpa_s);
}
static int wpa_supplicant_get_beacon_ie(void *wpa_s)
{
printf("%s - not implemented\n", __func__);
return -1;
}
static int wpa_supplicant_get_bssid(void *wpa_s, u8 *bssid)
{
printf("%s - not implemented\n", __func__);
return -1;
}
static int wpa_supplicant_set_key(void *wpa_s, wpa_alg alg,
const u8 *addr, int key_idx, int set_tx,
const u8 *seq, size_t seq_len,
const u8 *key, size_t key_len)
{
printf("%s - not implemented\n", __func__);
return -1;
}
static int wpa_supplicant_mlme_setprotection(void *wpa_s, const u8 *addr,
int protection_type,
int key_type)
{
printf("%s - not implemented\n", __func__);
return -1;
}
static int wpa_supplicant_add_pmkid(void *wpa_s,
const u8 *bssid, const u8 *pmkid)
{
printf("%s - not implemented\n", __func__);
return -1;
}
static int wpa_supplicant_remove_pmkid(void *wpa_s,
const u8 *bssid, const u8 *pmkid)
{
printf("%s - not implemented\n", __func__);
return -1;
}
static void wpa_supplicant_set_config_blob(void *ctx,
struct wpa_config_blob *blob)
{
struct wpa_supplicant *wpa_s = ctx;
wpa_config_set_blob(wpa_s->conf, blob);
}
static const struct wpa_config_blob *
wpa_supplicant_get_config_blob(void *ctx, const char *name)
{
struct wpa_supplicant *wpa_s = ctx;
return wpa_config_get_blob(wpa_s->conf, name);
}
static void test_eapol_clean(struct wpa_supplicant *wpa_s)
{
rsn_preauth_deinit(wpa_s->wpa);
pmksa_candidate_free(wpa_s->wpa);
wpa_sm_deinit(wpa_s->wpa);
scard_deinit(wpa_s->scard);
if (wpa_s->ctrl_iface) {
wpa_supplicant_ctrl_iface_deinit(wpa_s->ctrl_iface);
wpa_s->ctrl_iface = NULL;
}
wpa_config_free(wpa_s->conf);
}
static void eapol_test_timeout(void *eloop_ctx, void *timeout_ctx)
{
struct preauth_test_data *p = eloop_ctx;
printf("EAPOL test timed out\n");
p->auth_timed_out = 1;
eloop_terminate();
}
static void eapol_test_poll(void *eloop_ctx, void *timeout_ctx)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
if (!rsn_preauth_in_progress(wpa_s->wpa))
eloop_terminate();
else {
eloop_register_timeout(0, 100000, eapol_test_poll, eloop_ctx,
timeout_ctx);
}
}
static struct wpa_driver_ops dummy_driver;
static void wpa_init_conf(struct wpa_supplicant *wpa_s, const char *ifname)
{
struct l2_packet_data *l2;
struct wpa_sm_ctx *ctx;
os_memset(&dummy_driver, 0, sizeof(dummy_driver));
wpa_s->driver = &dummy_driver;
ctx = os_zalloc(sizeof(*ctx));
assert(ctx != NULL);
ctx->ctx = wpa_s;
ctx->set_state = _wpa_supplicant_set_state;
ctx->get_state = _wpa_supplicant_get_state;
ctx->deauthenticate = _wpa_supplicant_deauthenticate;
ctx->disassociate = _wpa_supplicant_disassociate;
ctx->set_key = wpa_supplicant_set_key;
ctx->get_network_ctx = wpa_supplicant_get_network_ctx;
ctx->get_bssid = wpa_supplicant_get_bssid;
ctx->ether_send = wpa_ether_send;
ctx->get_beacon_ie = wpa_supplicant_get_beacon_ie;
ctx->alloc_eapol = _wpa_alloc_eapol;
ctx->cancel_auth_timeout = _wpa_supplicant_cancel_auth_timeout;
ctx->add_pmkid = wpa_supplicant_add_pmkid;
ctx->remove_pmkid = wpa_supplicant_remove_pmkid;
ctx->set_config_blob = wpa_supplicant_set_config_blob;
ctx->get_config_blob = wpa_supplicant_get_config_blob;
ctx->mlme_setprotection = wpa_supplicant_mlme_setprotection;
wpa_s->wpa = wpa_sm_init(ctx);
assert(wpa_s->wpa != NULL);
wpa_sm_set_param(wpa_s->wpa, WPA_PARAM_PROTO, WPA_PROTO_RSN);
os_strlcpy(wpa_s->ifname, ifname, sizeof(wpa_s->ifname));
wpa_sm_set_ifname(wpa_s->wpa, wpa_s->ifname, NULL);
l2 = l2_packet_init(wpa_s->ifname, NULL, ETH_P_RSN_PREAUTH, NULL,
NULL, 0);
assert(l2 != NULL);
if (l2_packet_get_own_addr(l2, wpa_s->own_addr)) {
wpa_printf(MSG_WARNING, "Failed to get own L2 address\n");
exit(-1);
}
l2_packet_deinit(l2);
wpa_sm_set_own_addr(wpa_s->wpa, wpa_s->own_addr);
}
static void eapol_test_terminate(int sig, void *eloop_ctx,
void *signal_ctx)
{
struct wpa_supplicant *wpa_s = eloop_ctx;
wpa_msg(wpa_s, MSG_INFO, "Signal %d received - terminating", sig);
eloop_terminate();
}
int main(int argc, char *argv[])
{
struct wpa_supplicant wpa_s;
int ret = 1;
u8 bssid[ETH_ALEN];
struct preauth_test_data preauth_test;
if (os_program_init())
return -1;
os_memset(&preauth_test, 0, sizeof(preauth_test));
wpa_debug_level = 0;
wpa_debug_show_keys = 1;
if (argc != 4) {
printf("usage: preauth_test <conf> <target MAC address> "
"<ifname>\n");
return -1;
}
if (hwaddr_aton(argv[2], bssid)) {
printf("Failed to parse target address '%s'.\n", argv[2]);
return -1;
}
if (eap_peer_register_methods()) {
wpa_printf(MSG_ERROR, "Failed to register EAP methods");
return -1;
}
if (eloop_init(&wpa_s)) {
wpa_printf(MSG_ERROR, "Failed to initialize event loop");
return -1;
}
os_memset(&wpa_s, 0, sizeof(wpa_s));
wpa_s.conf = wpa_config_read(argv[1]);
if (wpa_s.conf == NULL) {
printf("Failed to parse configuration file '%s'.\n", argv[1]);
return -1;
}
if (wpa_s.conf->ssid == NULL) {
printf("No networks defined.\n");
return -1;
}
wpa_init_conf(&wpa_s, argv[3]);
wpa_s.ctrl_iface = wpa_supplicant_ctrl_iface_init(&wpa_s);
if (wpa_s.ctrl_iface == NULL) {
printf("Failed to initialize control interface '%s'.\n"
"You may have another preauth_test process already "
"running or the file was\n"
"left by an unclean termination of preauth_test in "
"which case you will need\n"
"to manually remove this file before starting "
"preauth_test again.\n",
wpa_s.conf->ctrl_interface);
return -1;
}
if (wpa_supplicant_scard_init(&wpa_s, wpa_s.conf->ssid))
return -1;
if (rsn_preauth_init(wpa_s.wpa, bssid, &wpa_s.conf->ssid->eap))
return -1;
eloop_register_timeout(30, 0, eapol_test_timeout, &preauth_test, NULL);
eloop_register_timeout(0, 100000, eapol_test_poll, &wpa_s, NULL);
eloop_register_signal_terminate(eapol_test_terminate, NULL);
eloop_register_signal_reconfig(eapol_test_terminate, NULL);
eloop_run();
if (preauth_test.auth_timed_out)
ret = -2;
else {
ret = pmksa_cache_set_current(wpa_s.wpa, NULL, bssid, NULL, 0)
? 0 : -3;
}
test_eapol_clean(&wpa_s);
eap_peer_unregister_methods();
eloop_destroy();
os_program_deinit();
return ret;
}