tools: Add simple test utility for L2CAP connectionless channels

1 files changed, 277 insertions, 0 deletions

diff --git a/tools/cltest.c b/tools/cltest.c
new file mode 100644
index 000000000..16b7553bc
--- /dev/null
+++ b/tools/cltest.c
@@ -0,0 +1,277 @@
+/*
+ *
+ *  BlueZ - Bluetooth protocol stack for Linux
+ *
+ *  Copyright (C) 2011-2012  Intel Corporation
+ *  Copyright (C) 2004-2010  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 as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <errno.h>
+#include <unistd.h>
+#include <alloca.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <sys/poll.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+
+#include <bluetooth/bluetooth.h>
+#include <bluetooth/hci.h>
+#include <bluetooth/hci_lib.h>
+#include <bluetooth/l2cap.h>
+
+#include "monitor/mainloop.h"
+
+static bool send_message(const bdaddr_t *src, const bdaddr_t *dst,
+							uint16_t psm)
+{
+	const unsigned char buf[] = { 0x42, 0x23 };
+	struct sockaddr_l2 addr;
+	ssize_t len;
+	int fd;
+
+	fd = socket(PF_BLUETOOTH, SOCK_DGRAM | SOCK_CLOEXEC, BTPROTO_L2CAP);
+	if (fd < 0) {
+		perror("Failed to create transmitter socket");
+		return false;
+	}
+
+	memset(&addr, 0, sizeof(addr));
+	addr.l2_family = AF_BLUETOOTH;
+	bacpy(&addr.l2_bdaddr, src);
+
+	if (bind(fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
+		perror("Failed to bind transmitter socket");
+		close(fd);
+		return false;
+	}
+
+	memset(&addr, 0, sizeof(addr));
+	addr.l2_family = AF_BLUETOOTH;
+	bacpy(&addr.l2_bdaddr, dst);
+	addr.l2_psm = htobs(psm);
+
+	if (connect(fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
+		perror("Failed to connect transmitter socket");
+		close(fd);
+		return false;
+	}
+
+	len = send(fd, buf, sizeof(buf), 0);
+	if (len < 0) {
+		perror("Failed to send message");
+		close(fd);
+		return false;
+	}
+
+	return true;
+}
+
+static void receiver_callback(int fd, uint32_t events, void *user_data)
+{
+	unsigned char buf[512];
+	struct sockaddr_l2 addr;
+	socklen_t addrlen = sizeof(addr);
+	char str[18];
+	ssize_t len, i;
+
+	if (events & (EPOLLERR | EPOLLHUP)) {
+		close(fd);
+		mainloop_remove_fd(fd);
+		return;
+	}
+
+	len = recvfrom(fd, buf, sizeof(buf), 0,
+				(struct sockaddr *) &addr, &addrlen);
+	if (len < 0) {
+		perror("Failed to receive data");
+		return;
+	}
+
+	if (addrlen > 0) {
+		ba2str(&addr.l2_bdaddr, str);
+		printf("RX Address: %s PSM: %d CID: %d\n", str,
+				btohs(addr.l2_psm), btohs(addr.l2_cid));
+	}
+
+	printf("RX Data:");
+	for (i = 0; i < len; i++)
+		printf(" 0x%02x", buf[i]);
+	printf("\n");
+}
+
+static bool create_receiver(const bdaddr_t *bdaddr, uint16_t psm)
+{
+	struct sockaddr_l2 addr;
+	int fd;
+
+	fd = socket(PF_BLUETOOTH, SOCK_DGRAM | SOCK_CLOEXEC, BTPROTO_L2CAP);
+	if (fd < 0) {
+		perror("Failed to create receiver socket");
+		return false;
+	}
+
+	memset(&addr, 0, sizeof(addr));
+	addr.l2_family = AF_BLUETOOTH;
+	bacpy(&addr.l2_bdaddr, bdaddr);
+	addr.l2_psm = htobs(psm);
+
+	if (bind(fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
+		perror("Failed to bind receiver socket");
+		close(fd);
+		return false;
+	}
+
+	mainloop_add_fd(fd, EPOLLIN, receiver_callback, NULL, NULL);
+
+	return true;
+}
+
+static bool activate_controller(int fd, struct hci_dev_info *di)
+{
+	if (!hci_test_bit(HCI_UP, &di->flags)) {
+		char addr[18];
+
+		ba2str(&di->bdaddr, addr);
+		printf("Activating controller %s\n", addr);
+
+		if (ioctl(fd, HCIDEVUP, di->dev_id) < 0) {
+			if (errno != EALREADY) {
+				perror("Failed to bring up HCI device");
+				return false;
+			}
+		}
+	}
+	return true;
+}
+
+static bool enable_connections(int fd, struct hci_dev_info *di)
+{
+	if (!hci_test_bit(HCI_PSCAN, &di->flags)) {
+		struct hci_dev_req dr;
+		char addr[18];
+
+		ba2str(&di->bdaddr, addr);
+		printf("Enabling connections on %s\n", addr);
+
+		dr.dev_id  = di->dev_id;
+		dr.dev_opt = SCAN_PAGE;
+
+		if (ioctl(fd, HCISETSCAN, (unsigned long) &dr) < 0) {
+			perror("Failed to enable connections");
+			return false;
+		}
+	}
+	return true;
+}
+
+static bdaddr_t bdaddr_src;
+static bdaddr_t bdaddr_dst;
+
+static bool find_controllers(void)
+{
+	struct hci_dev_list_req *dl;
+	struct hci_dev_req *dr;
+	bool result;
+	int fd, i;
+
+	fd = socket(AF_BLUETOOTH, SOCK_RAW, BTPROTO_HCI);
+	if (fd < 0) {
+		perror("Failed to open raw HCI socket");
+		return false;
+	}
+
+	dl = malloc(HCI_MAX_DEV * sizeof(struct hci_dev_req) + sizeof(uint16_t));
+	if (!dl) {
+		perror("Failed allocate HCI device request memory");
+		result = false;
+		goto done;
+	}
+
+	dl->dev_num = HCI_MAX_DEV;
+	dr = dl->dev_req;
+
+	if (ioctl(fd, HCIGETDEVLIST, (void *) dl) < 0) {
+		perror("Failed to get HCI device list");
+		result = false;
+		goto done;
+	}
+
+	result = true;
+
+	for (i = 0; i< dl->dev_num && result; i++) {
+		struct hci_dev_info di;
+
+		di.dev_id = (dr + i)->dev_id;
+
+		if (ioctl(fd, HCIGETDEVINFO, (void *) &di) < 0)
+			continue;
+
+		if (((di.type & 0x30) >> 4) != HCI_BREDR)
+			continue;
+
+		if (!bacmp(&bdaddr_src, BDADDR_ANY)) {
+			bacpy(&bdaddr_src, &di.bdaddr);
+			result = activate_controller(fd, &di);
+		} else if (!bacmp(&bdaddr_dst, BDADDR_ANY)) {
+			bacpy(&bdaddr_dst, &di.bdaddr);
+			result = activate_controller(fd, &di);
+			if (result)
+				result = enable_connections(fd, &di);
+		}
+	}
+
+done:
+	close(fd);
+	return result;
+}
+
+int main(int argc ,char *argv[])
+{
+	char addr_src[18], addr_dst[18];
+
+	bacpy(&bdaddr_src, BDADDR_ANY);
+	bacpy(&bdaddr_dst, BDADDR_ANY);
+
+	if (!find_controllers())
+		return EXIT_FAILURE;
+
+	if (!bacmp(&bdaddr_src, BDADDR_ANY) ||
+				!bacmp(&bdaddr_dst, BDADDR_ANY)) {
+		fprintf(stderr, "Two controllers are required\n");
+		return EXIT_FAILURE;
+	}
+
+	ba2str(&bdaddr_src, addr_src);
+	ba2str(&bdaddr_dst, addr_dst);
+
+	printf("%s -> %s\n", addr_src, addr_dst);
+
+	mainloop_init();
+
+	create_receiver(&bdaddr_dst, 0x0021);
+	send_message(&bdaddr_src, &bdaddr_dst, 0x0021);
+
+	return mainloop_run();
+}