/*
 *
 *  BlueZ - Bluetooth protocol stack for Linux
 *
 *  Copyright (C) 2002-2003  Maxim Krasnyansky <maxk@qualcomm.com>
 *  Copyright (C) 2002-2004  Marcel Holtmann <marcel@holtmann.org>
 *
 *
 *  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;
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
 *  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
 *  CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES 
 *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 
 *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 
 *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 *  ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, 
 *  COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS 
 *  SOFTWARE IS DISCLAIMED.
 *
 *
 *  $Id$
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/time.h>
#include <unistd.h>
#include <syslog.h>
#include <string.h>
#include <errno.h>
#include <signal.h>

#include <netinet/in.h>
#include <arpa/inet.h>
#include <resolv.h>
#include <netdb.h>
#include <sys/socket.h>

#include <bluetooth/bluetooth.h>
#include <bluetooth/rfcomm.h>

/* Test modes */
enum {
	SEND,
	RECV,
	RECONNECT,
	MULTY,
	DUMP,
	CONNECT,
	CRECV,
	LSEND
};

unsigned char *buf;

/* Default mtu */
int imtu = 672;
int omtu = 0;

/* Default data size */
long data_size = 127;
long num_frames = -1;

/* Default addr and channel */
bdaddr_t bdaddr;
uint8_t  channel = 10;

int master = 0;
int auth = 0;
int encrypt = 0;
int socktype = SOCK_STREAM;
int linger = 0;

float tv2fl(struct timeval tv)
{
	return (float)tv.tv_sec + (float)(tv.tv_usec/1000000.0);
}

int do_connect(char *svr)
{
	struct sockaddr_rc rem_addr, loc_addr;
	int s;

	if( (s = socket(PF_BLUETOOTH, socktype, BTPROTO_RFCOMM)) < 0 ) {
		syslog(LOG_ERR, "Can't create socket. %s(%d)", strerror(errno), errno);
		return -1;
	}

	/* Enable SO_LINGER */
	if (linger) {
		struct linger l = { .l_onoff = 1, .l_linger = linger };
		if (setsockopt(s, SOL_SOCKET, SO_LINGER, &l, sizeof(l)) < 0) {
			syslog(LOG_ERR, "Can't enable SO_LINGER. %s(%d)",
				strerror(errno), errno);
			return -1;
		}
	}

	memset(&loc_addr, 0, sizeof(loc_addr));
	loc_addr.rc_family = AF_BLUETOOTH;
	loc_addr.rc_bdaddr = bdaddr;
	if( bind(s, (struct sockaddr *) &loc_addr, sizeof(loc_addr)) < 0 ) {
		syslog(LOG_ERR, "Can't bind socket. %s(%d)", strerror(errno), errno);
		exit(1);
	}

	memset(&rem_addr, 0, sizeof(rem_addr));
	rem_addr.rc_family = AF_BLUETOOTH;
	baswap(&rem_addr.rc_bdaddr, strtoba(svr));
	rem_addr.rc_channel = channel;
	if( connect(s, (struct sockaddr *)&rem_addr, sizeof(rem_addr)) < 0 ){
		syslog(LOG_ERR, "Can't connect. %s(%d)", strerror(errno), errno);
		close(s);
		return -1;
	}

	syslog(LOG_INFO, "Connected");

	return s;
}

void do_listen( void (*handler)(int sk) )
{
	struct sockaddr_rc loc_addr, rem_addr;
	int  s, s1, opt;
	bdaddr_t ba;

	if( (s = socket(PF_BLUETOOTH, socktype, BTPROTO_RFCOMM)) < 0 ) {
		syslog(LOG_ERR, "Can't create socket. %s(%d)", strerror(errno), errno);
		exit(1);
	}

	loc_addr.rc_family = AF_BLUETOOTH;
	loc_addr.rc_bdaddr = bdaddr;
	loc_addr.rc_channel = channel;
	if( bind(s, (struct sockaddr *) &loc_addr, sizeof(loc_addr)) < 0 ) {
		syslog(LOG_ERR, "Can't bind socket. %s(%d)", strerror(errno), errno);
		exit(1);
	}

	/* Set link mode */
	opt = 0;
	if (master)
		 opt |= RFCOMM_LM_MASTER;

	if (auth)
		 opt |= RFCOMM_LM_AUTH;

	if (encrypt)
		 opt |= RFCOMM_LM_ENCRYPT;

	if (setsockopt(s, SOL_RFCOMM, RFCOMM_LM, &opt, sizeof(opt)) < 0) {
		syslog(LOG_ERR, "Can't set L2CAP link mode. %s(%d)", strerror(errno), errno);
		exit(1);
	}

	if( listen(s, 10) ) {
		syslog(LOG_ERR,"Can not listen on the socket. %s(%d)", strerror(errno), errno);
		exit(1);
	}

	syslog(LOG_INFO,"Waiting for connection on channel %d ...", channel);

	while(1) {
		opt = sizeof(rem_addr);
		if( (s1 = accept(s, (struct sockaddr *)&rem_addr, &opt)) < 0 ) {
			syslog(LOG_ERR,"Accept failed. %s(%d)", strerror(errno), errno);
			exit(1);
		}
		if( fork() ) {
			/* Parent */
			close(s1);
			continue;
		}
		/* Child */

		close(s);

		baswap(&ba, &rem_addr.rc_bdaddr);
		syslog(LOG_INFO, "Connect from %s \n", batostr(&ba));

		/* Enable SO_LINGER */
		if (linger) {
			struct linger l = { .l_onoff = 1, .l_linger = linger };
			if (setsockopt(s, SOL_SOCKET, SO_LINGER, &l, sizeof(l)) < 0) {
				syslog(LOG_ERR, "Can't enable SO_LINGER. %s(%d)",
					strerror(errno), errno);
				exit(1);
			}
		}

		handler(s1);

		syslog(LOG_INFO, "Disconnect\n");
		exit(0);
	}
}

void dump_mode(int s)
{
	int len;

	syslog(LOG_INFO, "Receiving ...");
	while ((len = read(s, buf, data_size)) > 0)
		syslog(LOG_INFO, "Recevied %d bytes\n", len);
}

void recv_mode(int s)
{
	struct timeval tv_beg,tv_end,tv_diff;
	long total;
	uint32_t seq;

	syslog(LOG_INFO,"Receiving ...");

	seq = 0;
	while (1) {
		gettimeofday(&tv_beg,NULL);
		total = 0;
		while (total < data_size) {
			//uint32_t sq;
			//uint16_t l;
			int r;

			if ((r = recv(s, buf, data_size, 0)) <= 0) {
				if (r < 0)
					syslog(LOG_ERR, "Read failed. %s(%d)",
							strerror(errno), errno);
				return;	
			}
#if 0
			/* Check sequence */
			sq = btohl(*(uint32_t *)buf);
			if (seq != sq) {
				syslog(LOG_INFO, "seq missmatch: %d -> %d", seq, sq);
				seq = sq;
			}
			seq++;
			
			/* Check length */
			l = btohs(*(uint16_t *)(buf+4));
			if (r != l) {
				syslog(LOG_INFO, "size missmatch: %d -> %d", r, l);
				continue;
			}
			
			/* Verify data */	
			for (i=6; i < r; i++) {
				if (buf[i] != 0x7f)
					syslog(LOG_INFO, "data missmatch: byte %d 0x%2.2x", i, buf[i]);
			}
#endif
			total += r;
		}
		gettimeofday(&tv_end,NULL);

		timersub(&tv_end,&tv_beg,&tv_diff);

		syslog(LOG_INFO,"%ld bytes in %.2f sec, %.2f kB/s",total,
		       tv2fl(tv_diff), (float)(total / tv2fl(tv_diff) ) / 1024.0);
	}
}

void send_mode(int s)
{
	uint32_t seq;
	int i;

	syslog(LOG_INFO,"Sending ...");

	for(i=6; i < data_size; i++)
		buf[i]=0x7f;

	seq = 0;
	while ((num_frames == -1) || (num_frames-- > 0)) {
		*(uint32_t *) buf = htobl(seq);
		*(uint16_t *)(buf+4) = htobs(data_size);
		seq++;
		
		if (send(s, buf, data_size, 0) <= 0) {
			syslog(LOG_ERR, "Send failed. %s(%d)", strerror(errno), errno);
			exit(1);
		}
	}

	syslog(LOG_INFO, "Closing channel ...");
	if (shutdown(s, SHUT_RDWR) < 0)
		syslog(LOG_INFO, "Close failed. %m.");
	else
		syslog(LOG_INFO, "Done");
}

void reconnect_mode(char *svr)
{
	while(1) {
		int s = do_connect(svr);
		close(s);
	}
}

void multi_connect_mode(char *svr)
{
	while (1) {
		int i, s;
		for (i=0; i<10; i++) {
			if (fork()) continue;

			/* Child */
			s = do_connect(svr);
			usleep(500);
			close(s);
			exit(0);
		}
		sleep(2);
	}
}

void usage(void)
{
	printf("rctest - RFCOMM testing\n"
		"Usage:\n");
	printf("\trctest <mode> [options] [bdaddr]\n");
	printf("Modes:\n"
		"\t-r listen and receive\n"
		"\t-w listen and send\n"
		"\t-d listen and dump incoming data\n"
		"\t-s connect and send\n"
		"\t-u connect and receive\n"
		"\t-n connect and be silent\n"
		"\t-c connect, disconnect, connect, ...\n"
		"\t-m multiple connects\n");

	printf("Options:\n"
		"\t[-b bytes] [-S bdaddr] [-P channel]\n"
	       	"\t[-I imtu] [-O omtu]\n"
	       	"\t[-L seconds] enabled SO_LINGER option\n"
	       	"\t[-N num] number of frames to send\n"
		"\t[-A] request authentication\n"
		"\t[-E] request encryption\n"
	       	"\t[-M] become master\n");
}

extern int optind,opterr,optopt;
extern char *optarg;

int main(int argc ,char *argv[])
{
	int opt, mode, s, need_addr;
	struct sigaction sa;

	mode = RECV; need_addr = 0;
	
	while ((opt=getopt(argc,argv,"rdscuwmnb:P:I:O:S:MAEL:N:")) != EOF) {
		switch(opt) {
		case 'r':
			mode = RECV;
			break;
		
		case 's':
			mode = SEND;
			need_addr = 1;
			break;

		case 'w':
			mode = LSEND;
			break;

		case 'u':
			mode = CRECV;
			need_addr = 1;
			break;

		case 'd':
			mode = DUMP;
			break;

		case 'c':
			mode = RECONNECT;
			need_addr = 1;
			break;

		case 'n':
			mode = CONNECT;
			need_addr = 1;
			break;

		case 'm':
			mode = MULTY;
			need_addr = 1;
			break;

		case 'b':
			data_size = atoi(optarg);
			break;

		case 'S':
			baswap(&bdaddr, strtoba(optarg));
			break;

		case 'P':
			channel = atoi(optarg);
			break;

		case 'I':
			imtu = atoi(optarg);
			break;

		case 'O':
			omtu = atoi(optarg);
			break;

		case 'M':
			master = 1;
			break;

		case 'A':
			auth = 1;
			break;

		case 'E':
			encrypt = 1;
			break;

		case 'L':
			linger = atoi(optarg);
			break;

		case 'N':
			num_frames = atoi(optarg);
			break;

		default:
			usage();
			exit(1);
		}
	}

	if (need_addr && !(argc - optind)) {
		usage();
		exit(1);
	}

	if (!(buf = malloc(data_size))) {
		perror("Can't allocate data buffer");
		exit(1);
	}

	memset(&sa, 0, sizeof(sa));
	sa.sa_handler = SIG_IGN;
	sa.sa_flags   = SA_NOCLDSTOP;
	sigaction(SIGCHLD, &sa, NULL);

	openlog("rctest", LOG_PERROR | LOG_PID, LOG_LOCAL0);

	switch( mode ){
		case RECV:
			do_listen(recv_mode);
			break;

		case CRECV:
			s = do_connect(argv[optind]);
			if (s < 0)
				exit(1);
			recv_mode(s);
			break;

		case DUMP:
			do_listen(dump_mode);
			break;

		case SEND:
			s = do_connect(argv[optind]);
			if (s < 0)
				exit(1);
			send_mode(s);
			break;

		case LSEND:
			do_listen(send_mode);
			break;

		case RECONNECT:
			reconnect_mode(argv[optind]);
			break;

		case MULTY:
			multi_connect_mode(argv[optind]);
			break;

		case CONNECT:
			s = do_connect(argv[optind]);
			if (s < 0)
				exit(1);
			dump_mode(s);
			break;
	}
	syslog(LOG_INFO, "Exit");

	closelog();

	return 0;
}