hostapd/tests/fuzzing/wnm/wnm.c

/*
 * wpa_supplicant - WNM fuzzer
 * Copyright (c) 2015-2019, Jouni Malinen <j@w1.fi>
 *
 * 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 "common/ieee802_11_defs.h"
#include "rsn_supp/wpa.h"
#include "rsn_supp/wpa_i.h"
#include "wpa_supplicant_i.h"
#include "bss.h"
#include "wnm_sta.h"
#include "../../../wpa_supplicant/config.h"
#include "../fuzzer-common.h"


struct arg_ctx {
	const u8 *data;
	size_t data_len;
	struct wpa_supplicant wpa_s;
	struct wpa_bss bss;
	struct wpa_driver_ops driver;
	struct wpa_sm wpa;
	struct wpa_config conf;
};


static void test_send_wnm(void *eloop_data, void *user_ctx)
{
	struct arg_ctx *ctx = eloop_data;
	const struct ieee80211_mgmt *mgmt;

	wpa_hexdump(MSG_MSGDUMP, "fuzzer - WNM", ctx->data, ctx->data_len);

	mgmt = (const struct ieee80211_mgmt *) ctx->data;
	ieee802_11_rx_wnm_action(&ctx->wpa_s, mgmt, ctx->data_len);

	eloop_terminate();
}


static int init_wpa(struct arg_ctx *ctx)
{
	ctx->wpa_s.wpa_state = WPA_COMPLETED;
	os_memcpy(ctx->wpa_s.bssid, "\x02\x00\x00\x00\x03\x00", ETH_ALEN);
	ctx->wpa_s.current_bss = &ctx->bss;
	ctx->wpa_s.driver = &ctx->driver;
	ctx->wpa_s.wpa = &ctx->wpa;
	ctx->wpa_s.conf = &ctx->conf;
	if (wpa_bss_init(&ctx->wpa_s) < 0)
		return -1;

	return 0;
}


static void deinit_wpa(struct arg_ctx *ctx)
{
	wnm_btm_reset(&ctx->wpa_s);
	wpa_bss_flush(&ctx->wpa_s);
}


int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
{
	struct arg_ctx ctx;

	wpa_fuzzer_set_debug_level();

	if (os_program_init())
		return 0;

	if (eloop_init()) {
		wpa_printf(MSG_ERROR, "Failed to initialize event loop");
		return 0;
	}

	os_memset(&ctx, 0, sizeof(ctx));
	ctx.data = data;
	ctx.data_len = size;
	if (init_wpa(&ctx))
		goto fail;

	eloop_register_timeout(0, 0, test_send_wnm, &ctx, NULL);

	wpa_printf(MSG_DEBUG, "Starting eloop");
	eloop_run();
	wpa_printf(MSG_DEBUG, "eloop done");
	deinit_wpa(&ctx);

fail:
	eloop_destroy();
	os_program_deinit();

	return 0;
}