monitor: Add support for storing btsnoop formatted logs

4 files changed, 206 insertions, 0 deletions

diff --git a/monitor/btsnoop.c b/monitor/btsnoop.c
new file mode 100644
index 00000000..09c5e257
--- /dev/null
+++ b/monitor/btsnoop.c
@@ -0,0 +1,145 @@
+/*
+ *
+ *  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 <fcntl.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <arpa/inet.h>
+
+#include "btsnoop.h"
+
+static inline uint64_t ntoh64(uint64_t n)
+{
+	uint64_t h;
+	uint64_t tmp = ntohl(n & 0x00000000ffffffff);
+
+	h = ntohl(n >> 32);
+	h |= tmp << 32;
+
+	return h;
+}
+
+#define hton64(x)     ntoh64(x)
+
+struct btsnoop_hdr {
+	uint8_t		id[8];		/* Identification Pattern */
+	uint32_t	version;	/* Version Number = 1 */
+	uint32_t	type;		/* Datalink Type */
+} __attribute__ ((packed));
+#define BTSNOOP_HDR_SIZE (sizeof(struct btsnoop_hdr))
+
+struct btsnoop_pkt {
+	uint32_t	size;		/* Original Length */
+	uint32_t	len;		/* Included Length */
+	uint32_t	flags;		/* Packet Flags */
+	uint32_t	drops;		/* Cumulative Drops */
+	uint64_t	ts;		/* Timestamp microseconds */
+	uint8_t		data[0];	/* Packet Data */
+} __attribute__ ((packed));
+#define BTSNOOP_PKT_SIZE (sizeof(struct btsnoop_pkt))
+
+static const uint8_t btsnoop_id[] = { 0x62, 0x74, 0x73, 0x6e,
+				      0x6f, 0x6f, 0x70, 0x00 };
+
+static const uint32_t btsnoop_version = 1;
+static const uint32_t btsnoop_type = 1001;
+
+static int btsnoop_fd = -1;
+static uint16_t btsnoop_index = 0xffff;
+
+void btsnoop_open(const char *path)
+{
+	if (btsnoop_fd >= 0)
+		return;
+
+	btsnoop_fd = open(path, O_WRONLY | O_CREAT | O_TRUNC,
+				S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
+}
+
+void btsnoop_write(struct timeval *tv, uint16_t index, uint32_t flags,
+					const void *data, uint16_t size)
+{
+	struct btsnoop_hdr hdr;
+	struct btsnoop_pkt pkt;
+	uint64_t ts;
+	ssize_t written;
+
+	if (!tv)
+		return;
+
+	if (btsnoop_fd < 0)
+		return;
+
+	if (btsnoop_index == 0xffff) {
+		memcpy(hdr.id, btsnoop_id, sizeof(btsnoop_id));
+		hdr.version = htonl(btsnoop_version);
+		hdr.type = htonl(btsnoop_type);
+
+		written = write(btsnoop_fd, &hdr, BTSNOOP_HDR_SIZE);
+		if (written < 0)
+			return;
+
+		btsnoop_index = index;
+	}
+
+	if (index != btsnoop_index)
+		return;
+
+	ts = (tv->tv_sec - 946684800ll) * 1000000ll + tv->tv_usec;
+
+	pkt.size  = htonl(size);
+	pkt.len   = htonl(size);
+	pkt.flags = htonl(flags);
+	pkt.drops = htonl(0);
+	pkt.ts    = hton64(ts + 0x00E03AB44A676000ll);
+
+	written = write(btsnoop_fd, &pkt, BTSNOOP_PKT_SIZE);
+	if (written < 0)
+		return;
+
+	if (data && size > 0) {
+		written = write(btsnoop_fd, data, size);
+		if (written < 0)
+			return;
+	}
+}
+
+void btsnoop_close(void)
+{
+	if (btsnoop_fd < 0)
+		return;
+
+	close(btsnoop_fd);
+	btsnoop_fd = -1;
+
+	btsnoop_index = 0xffff;
+}
diff --git a/monitor/btsnoop.h b/monitor/btsnoop.h
new file mode 100644
index 00000000..9472d1a2
--- /dev/null
+++ b/monitor/btsnoop.h
@@ -0,0 +1,30 @@
+/*
+ *
+ *  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
+ *
+ */
+
+#include <sys/time.h>
+
+void btsnoop_open(const char *path);
+void btsnoop_write(struct timeval *tv, uint16_t index, uint32_t flags,
+					const void *data, uint16_t size);
+void btsnoop_close(void);
diff --git a/monitor/main.c b/monitor/main.c
index b4781e8b..9021133c 100644
--- a/monitor/main.c
+++ b/monitor/main.c
@@ -28,11 +28,13 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <getopt.h>
 
 #include "mainloop.h"
 #include "packet.h"
 #include "control.h"
 #include "hcidump.h"
+#include "btsnoop.h"
 
 static void signal_callback(int signum, void *user_data)
 {
@@ -44,6 +46,11 @@ static void signal_callback(int signum, void *user_data)
 	}
 }
 
+static const struct option main_options[] = {
+	{ "btsnoop",	required_argument, NULL, 'b'	},
+	{ }
+};
+
 int main(int argc, char *argv[])
 {
 	unsigned long filter_mask = 0;
@@ -51,6 +58,23 @@ int main(int argc, char *argv[])
 
 	mainloop_init();
 
+	for (;;) {
+		int opt;
+
+		opt = getopt_long(argc, argv, "b", main_options, NULL);
+		if (opt < 0)
+			break;
+
+		switch (opt) {
+		case 'b':
+			btsnoop_open(optarg);
+			break;
+		default:
+			return EXIT_FAILURE;
+		}
+	}
+
+
 	sigemptyset(&mask);
 	sigaddset(&mask, SIGINT);
 	sigaddset(&mask, SIGTERM);
diff --git a/monitor/packet.c b/monitor/packet.c
index a445bd70..356e0a30 100644
--- a/monitor/packet.c
+++ b/monitor/packet.c
@@ -41,6 +41,7 @@
 #include <bluetooth/hci_lib.h>
 
 #include "control.h"
+#include "btsnoop.h"
 #include "packet.h"
 
 static unsigned long filter_mask = 0;
@@ -570,6 +571,8 @@ void packet_hci_command(struct timeval *tv, uint16_t index,
 	uint16_t ogf = cmd_opcode_ogf(opcode);
 	uint16_t ocf = cmd_opcode_ocf(opcode);
 
+	btsnoop_write(tv, index, 0x02, data, size);
+
 	print_header(tv, index);
 
 	if (size < HCI_COMMAND_HDR_SIZE) {
@@ -591,6 +594,8 @@ void packet_hci_event(struct timeval *tv, uint16_t index,
 {
 	const hci_event_hdr *hdr = data;
 
+	btsnoop_write(tv, index, 0x03, data, size);
+
 	print_header(tv, index);
 
 	if (size < HCI_EVENT_HDR_SIZE) {
@@ -615,6 +620,8 @@ void packet_hci_acldata(struct timeval *tv, uint16_t index, bool in,
 	uint16_t dlen = btohs(hdr->dlen);
 	uint8_t flags = acl_flags(handle);
 
+	btsnoop_write(tv, index, in ? 0x01 : 0x00, data, size);
+
 	print_header(tv, index);
 
 	if (size < HCI_ACL_HDR_SIZE) {