l2test.c

Bluezan implementation of the Bluetooth&#8482 wireless standards specifications for Linux. The code

		FD_SET(sk, &rset);

		if (select(sk + 1, &rset, NULL, NULL, NULL) < 0)
			return;

		if (!FD_ISSET(sk, &rset))
			continue;

		len = read(sk, buf, data_size);
		if (len <= 0) {
			if (len < 0) {
				if (reliable && (errno == ECOMM)) {
					syslog(LOG_INFO, "L2CAP Error ECOMM - clearing error and continuing.");
					optlen = sizeof(opt);
					if (getsockopt(sk, SOL_SOCKET, SO_ERROR, &opt, &optlen) < 0) {
						syslog(LOG_ERR, "Couldn't getsockopt(SO_ERROR): %s (%d)",
							strerror(errno), errno);
						return;
					}
					continue;
				} else {
					syslog(LOG_ERR, "Read error: %s(%d)",
							strerror(errno), errno);
				}
			}
			return;
		}

		syslog(LOG_INFO, "Recevied %d bytes", len);
		hexdump(buf,len);
	}
}

static void recv_mode(int sk)
{
	struct timeval tv_beg, tv_end, tv_diff;
	struct pollfd p;
	long total;
	uint32_t seq;
	socklen_t optlen;
	int opt;

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

	p.fd = sk;
	p.events = POLLIN | POLLERR | POLLHUP;

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

			p.revents = 0;
			if (poll(&p, 1, -1) <= 0)
				return;

			if (p.revents & (POLLERR | POLLHUP))
				return;

			len = recv(sk, buf, data_size, 0);
			if (len < 0) {
				if (reliable && (errno == ECOMM)) {
					syslog(LOG_INFO, "L2CAP Error ECOMM - clearing error and continuing.\n");
					optlen = sizeof(opt);
					if (getsockopt(sk, SOL_SOCKET, SO_ERROR, &opt, &optlen) < 0) {
						syslog(LOG_ERR, "Couldn't getsockopt(SO_ERROR): %s (%d)",
							strerror(errno), errno);
						return;
					}
					continue;
				} else {
					syslog(LOG_ERR, "Read failed: %s (%d)",
						strerror(errno), errno);
				}
			}

			if (len < 6)
				break;

			/* 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 (len != l) {
				syslog(LOG_INFO, "size missmatch: %d -> %d", len, l);
				continue;
			}

			/* Verify data */
			for (i = 6; i < len; i++) {
				if (buf[i] != 0x7f)
					syslog(LOG_INFO, "data missmatch: byte %d 0x%2.2x", i, buf[i]);
			}

			total += len;
		}
		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);
	}
}

static void send_mode(int sk)
{
	uint32_t seq;
	int i, len;

	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++;

		len = send(sk, buf, data_size, 0);
		if (len < 0 || len != data_size) {
			syslog(LOG_ERR, "Send failed: %s (%d)", strerror(errno), errno);
			exit(1);
		}
	}

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

static void senddump_mode(int sk)
{
	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(sk, buf, data_size, 0) <= 0) {
			syslog(LOG_ERR, "Send failed: %s (%d)", strerror(errno), errno);
			exit(1);
		}
	}

	dump_mode(sk);
}

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

static void connect_mode(char *svr)
{
	struct pollfd p;
	int sk;

	if ((sk = do_connect(svr)) < 0)
		exit(1);

	p.fd = sk;
	p.events = POLLERR | POLLHUP;

	while (1) {
		p.revents = 0;
		if (poll(&p, 1, 100))
			break;
	}

	syslog(LOG_INFO, "Disconnected");

	close(sk);
}

static 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);
	}
}

static void usage(void)
{
	printf("l2test - L2CAP testing\n"
		"Usage:\n");
	printf("\tl2test <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-x listen, then send, then dump incoming data\n"
		"\t-s connect and send\n"
		"\t-u connect and receive\n"
		"\t-n connect and be silent\n"
		"\t-y connect, then send, then dump incoming data\n"
		"\t-c connect, disconnect, connect, ...\n"
		"\t-m multiple connects\n");

	printf("Options:\n"
		"\t[-b bytes] [-i device] [-P psm]\n"
		"\t[-I imtu] [-O omtu]\n"
		"\t[-N num] send num frames (default = infinite)\n"
		"\t[-L seconds] enable SO_LINGER\n"
		"\t[-R] reliable mode\n"
		"\t[-D] use connectionless channel (datagram)\n"
		"\t[-F] enable flow control\n"
		"\t[-A] request authentication\n"
		"\t[-E] request encryption\n"
		"\t[-S] secure connection\n"
		"\t[-M] become master\n");
}

int main(int argc ,char *argv[])
{
	struct sigaction sa;
	int opt, sk, mode = RECV, need_addr = 0;

	bacpy(&bdaddr, BDADDR_ANY);

	while ((opt=getopt(argc,argv,"rdscuwmnxyb:i:P:I:O:N:L:RDFAESM")) != 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 'x':
			mode = LSENDDUMP;
			break;

		case 'y':
			mode = SENDDUMP;
			break;

		case 'i':
			if (!strncasecmp(optarg, "hci", 3))
				hci_devba(atoi(optarg + 3), &bdaddr);
			else
				str2ba(optarg, &bdaddr);
			break;

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

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

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

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

		case 'R':
			reliable = 1;
			break;

		case 'M':
			master = 1;
			break;

		case 'F':
			flowctl = 1;
			break;

		case 'A':
			auth = 1;
			break;

		case 'E':
			encrypt = 1;
			break;

		case 'S':
			secure = 1;
			break;

		case 'D':
			socktype = SOCK_DGRAM;
			break;

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

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

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

	if (data_size < 0) {
		data_size = 48;
		if (imtu > data_size)
			data_size = imtu;
		if (omtu > data_size)
			data_size = omtu;
	}

	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("l2test", LOG_PERROR | LOG_PID, LOG_LOCAL0);

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

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

		case DUMP:
			do_listen(dump_mode);
			break;

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

		case SENDDUMP:
			sk = do_connect(argv[optind]);
			if (sk < 0)
				exit(1);
			senddump_mode(sk);
			break;

		case LSENDDUMP:
			do_listen(senddump_mode);
			break;
	}

	syslog(LOG_INFO, "Exit");

	closelog();

	return 0;
}