path: root/tools/l2ping.c

/* 
	BlueZ - Bluetooth protocol stack for Linux
	Copyright (C) 2000-2001 Qualcomm Incorporated

	Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>

	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.
*/

/*
 * $Id$
 */

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

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

#include <asm/types.h>
#include <asm/byteorder.h>

#include <bluetooth/bluetooth.h>
#include <bluetooth/l2cap.h>

/* Defaults */
bdaddr_t bdaddr;
int size  = 20;
int ident = 200;
int delay = 1;
int count = -1;

/* Stats */
int sent_pkt = 0, recv_pkt = 0;

static float tv2fl(struct timeval tv)
{
	return (float)(tv.tv_sec*1000.0) + (float)(tv.tv_usec/1000.0);
}

static void stat(int sig)
{
	int loss = sent_pkt ? (float)((sent_pkt-recv_pkt)/(sent_pkt/100.0)) : 0;
	printf("%d sent, %d received, %d%% loss\n", sent_pkt, recv_pkt, loss);
	exit(0);
}

static void ping(char *svr)
{
	struct sockaddr_l2 addr;
	struct sigaction sa;
	char buf[2048];
	char str[18];
	int s, i, opt, lost;
	uint8_t id;

	memset(&sa, 0, sizeof(sa));
	sa.sa_handler = stat;
	sigaction(SIGINT, &sa, NULL);

	if ((s = socket(PF_BLUETOOTH, SOCK_RAW, BTPROTO_L2CAP)) < 0) {
		perror("Can't create socket.");
		exit(1);
	}

	memset(&addr, 0, sizeof(addr));
	addr.l2_family = AF_BLUETOOTH;
	addr.l2_bdaddr = bdaddr;
        if (bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
		perror("Can't bind socket.");
		exit(1);
        }

	str2ba(svr, &addr.l2_bdaddr);
	if (connect(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
		perror("Can't connect.");
		exit(1);
	}

	/* Get local address */
	opt = sizeof(addr);
	if( getsockname(s, (struct sockaddr *)&addr, &opt) < 0 ) {
		perror("Can't get local address.");
		exit(1);
	}
	ba2str(&addr.l2_bdaddr, str);

	printf("Ping: %s from %s (data size %d) ...\n", svr, str, size);

	/* Initialize buffer */
	for(i = L2CAP_CMD_HDR_SIZE; i < sizeof(buf); i++)
		buf[i]=(i%40)+'A';

	id = ident;

	while( count == -1 || count-- > 0 ){
		struct timeval tv_send, tv_recv, tv_diff;
		l2cap_cmd_hdr *cmd = (l2cap_cmd_hdr *) buf;

		/* Build command header */
		cmd->code  = L2CAP_ECHO_REQ;
		cmd->ident = id;
		cmd->len   = __cpu_to_le16(size);

		gettimeofday(&tv_send, NULL);

		/* Send Echo Request */
		if( send(s, buf, size + L2CAP_CMD_HDR_SIZE, 0) <= 0 ){
			perror("Send failed");
			exit(1);
		}

		/* Wait for Echo Response */
		lost = 0;
		while( 1 ) {
			struct pollfd pf[1];
			register int err;

			pf[0].fd = s; pf[0].events = POLLIN;
			if( (err = poll(pf, 1, 10*1000)) < 0 ) {
				perror("Poll failed");
				exit(1);
			}

			if( !err ){
				lost = 1;
				break;
			}

			if( (err = recv(s, buf, sizeof(buf), 0)) < 0 ) {
				perror("Recv failed");
				exit(1);
			}

			if( !err ){
				printf("Disconnected\n");
				exit(1);
			}

			cmd->len = __le16_to_cpu(cmd->len);

			/* Check for our id */
			if( cmd->ident != id )
				continue;

			/* Check type */
			if( cmd->code == L2CAP_ECHO_RSP )
				break;
			if( cmd->code == L2CAP_COMMAND_REJ ){
				printf("Peer doesn't support Echo packets\n");
				exit(1);
			}

		}
		sent_pkt++;

		if( !lost ){
			recv_pkt++;

			gettimeofday(&tv_recv, NULL);
			timersub(&tv_recv, &tv_send, &tv_diff);

			printf("%d bytes from %s id %d time %.2fms\n", cmd->len, svr, id, tv2fl(tv_diff));

			if( delay ) sleep(delay);
		} else {
			printf("no response from %s: id %d\n", svr, id);
		}

		if( ++id > 254 ) id = ident;
	}
	stat(0);
}

static void usage(void)
{
	printf("l2ping - L2CAP ping\n");
	printf("Usage:\n");
	printf("\tl2ping [-S source addr] [-s size] [-c count] [-f] <bd_addr>\n");
}

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

int main(int argc, char *argv[])
{
	register int opt;

	/* Default options */
	bacpy(&bdaddr, BDADDR_ANY);

	while ((opt=getopt(argc,argv,"s:c:fS:")) != EOF) {
		switch(opt) {
		case 'f':
			/* Kinda flood ping */
			delay = 0;
			break;

		case 'c':
			count = atoi(optarg);
			break;

		case 's':
			size = atoi(optarg);
			break;

		case 'S':
			str2ba(optarg, &bdaddr);
			break;

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

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

	ping(argv[optind]);

	return 0;
}