bluez/tools/hcidump.c

/* 
	HCIDump - HCI packet analyzer	
	Copyright (C) 2000-2001 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 <termios.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/uio.h>
#include <errno.h>
#include <string.h>

#include <asm/types.h>

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

#include <pwd.h>
#include <argp.h>
    
#include "parser.h"
#include "hcidump.h"

/* Default options */
static int  device;
static int  snap_len = SNAP_LEN;
static int  mode  = PARSE;
static long flags; 
static char *dump_file;

static void process_frames(int dev, int sock, int file)
{
	struct cmsghdr *cmsg;
	struct msghdr msg;
	struct iovec  iv;
	struct dump_hdr *dh;
	struct frame frm;
	char *buf, *ctrl;

	if (snap_len < SNAP_LEN)
		snap_len = SNAP_LEN;

	if (!(buf = malloc(snap_len + DUMP_HDR_SIZE))) {
		perror("Can't allocate data buffer");
		exit(1);
	}
	dh = (void *) buf;
	frm.data = buf + DUMP_HDR_SIZE;
	
	if (!(ctrl = malloc(100))) {
		perror("Can't allocate control buffer");
		exit(1);
	}
	
	printf("device: hci%d snap_len: %d filter: none\n", dev, snap_len); 

	while (1) {
		iv.iov_base = frm.data;
		iv.iov_len  = snap_len;

		msg.msg_iov = &iv;
		msg.msg_iovlen = 1;
		msg.msg_control = ctrl;
		msg.msg_controllen = 100;

		if ((frm.data_len = recvmsg(sock, &msg, 0)) < 0) {
			perror("Receive failed");
			exit(1);
		}

		/* Process control message */
		frm.in = 0;
		cmsg = CMSG_FIRSTHDR(&msg);
		while (cmsg) {
			switch (cmsg->cmsg_type) {
			case HCI_CMSG_DIR:
				frm.in = *((int *)CMSG_DATA(cmsg));
				break;
			}
			cmsg = CMSG_NXTHDR(&msg, cmsg);
		}

		frm.ptr = frm.data;
		frm.len = frm.data_len;

		switch (mode) {
		case RAW:
			/* Print raw dump */
      			printf("%c ", (frm.in ? '>' : '<')); 
			raw_dump(0, &frm);
			fflush(stdout);
			break;

		case WRITE:
			/* Save dump */	
			dh->len = __cpu_to_le16(frm.data_len);
			dh->in  = frm.in;
			if (write_n(file, buf, frm.data_len + DUMP_HDR_SIZE) < 0) {
				perror("Write error");
				exit(1);
			}
			break;

		default:
			/* Parse and print */
			parse(&frm);
			break;
		}
	}
}

static void read_dump(int file)
{
	struct dump_hdr dh;
	struct frame frm;
	int err;

	if (!(frm.data = malloc(HCI_MAX_FRAME_SIZE))) {
		perror("Can't allocate data buffer");
		exit(1);
	}
	
	while (1) {
		if ((err = read_n(file, (void *) &dh, DUMP_HDR_SIZE)) < 0)
			goto failed;
		if (!err) return;
		
		frm.data_len = __le16_to_cpu(dh.len);

		if ((err = read_n(file, frm.data, frm.data_len)) < 0)
			goto failed;
		if (!err) return;

		frm.ptr = frm.data;
		frm.len = frm.data_len;
		frm.in  = dh.in;
		
		parse(&frm);
	}

failed:
	perror("Read failed");
	exit(1);
}

static int open_file(char *file, int mode)
{
	int f, flags;

	if (mode == WRITE)
		flags = O_WRONLY | O_CREAT | O_APPEND;
	else
		flags = O_RDONLY;

	if ((f = open(file, flags)) < 0) {
		perror("Can't open output file");
		exit(1);
	}
	return f;
}

static int open_socket(int dev)
{
	struct sockaddr_hci addr;
	struct hci_filter flt;
	int s, opt;

	/* Create HCI socket */
	if ((s=socket(AF_BLUETOOTH, SOCK_RAW, BTPROTO_HCI)) < 0) {
		perror("Can't create HCI socket");
		exit(1);
	}
	
	opt = 1;
	if (setsockopt(s, SOL_HCI, HCI_DATA_DIR, &opt, sizeof(opt)) < 0) {
		perror("Can't enable data direction info");
		exit(1);
	}

	/* Setup filter */
	flt.type_mask  = ~0;      // All packet types
	flt.event_mask[0] = ~0L;  // All events
	flt.event_mask[1] = ~0L;
	if (setsockopt(s, SOL_HCI, HCI_FILTER, &flt, sizeof(flt)) < 0) {
		perror("Can't set HCI filter");
		exit(1);
	}

	/* Bind socket to the HCI device */
	addr.hci_family = AF_BLUETOOTH;
	addr.hci_dev = dev;
	if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
		printf("Can't attach to device hci%d. %s(%d)\n", 
					dev, strerror(errno), errno);
		exit(1);
	}
	return s;
}

const char *argp_program_version = "HCIDump "VERSION;
const char *argp_program_bug_address = "<bluez-users@lists.sf.net>";
     
static struct argp_option options[] = {
	{"device", 	'i', "hci_dev", 0, "HCI device", 0  },
	{"snap-len", 	's', "len",  0, "Snap len (in bytes)", 1 },
	{"save-dump",	'w', "file", 0, "Save dump to a file", 2 },
	{"read-dump",	'r', "file", 0, "Read dump from a file", 2 },
	{"hex", 	'h', 0,  0, "Dump data in hex", 3 },
	{"ascii", 	'a', 0,  0, "Dump data in ascii", 3 },
	{"raw", 	'R', 0,  0, "Raw mode", 3 },
	{ 0 }
};

static error_t parse_opt(int key, char *arg, struct argp_state *state)
{
	switch (key) {
		case 'i':
			device = atoi(arg+3);
			break;

		case 'h':
			flags |= DUMP_HEX;
			break;

		case 'a': 
			flags |= DUMP_ASCII;
			break;

		case 's': 
			snap_len = atoi(arg);
			break;

		case 'R': 
			flags |= DUMP_HEX;
			mode = RAW;
			break;

		case 'r':
			mode = READ;
			dump_file = strdup(arg);
			break;

		case 'w':
			mode = WRITE;
			dump_file = strdup(arg);
			break;

		default:
			return ARGP_ERR_UNKNOWN;
	}
	return 0;
}
     
static struct argp parser = { 
	options, 
	parse_opt, 
	"",
	"HCIDump - HCI packet analyzer ver " VERSION
};

int main(int argc, char *argv[])
{
	argp_parse(&parser, argc, argv, 0, NULL, NULL);
	
	printf("HCIDump - HCI packet analyzer ver %s.\n", VERSION);

	switch (mode) {
	case RAW:
	case PARSE:
		init_parser(flags);
		process_frames(device, open_socket(device), -1);
		break;

	case WRITE:
		process_frames(device, open_socket(device), open_file(dump_file, mode));
		break;

	case READ:
		init_parser(flags);
		read_dump(open_file(dump_file, mode));
		break;
	}
	return 0;
}