parser.c

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

/*
 *
 *  Bluetooth packet analyzer - Common parser functions
 *
 *  Copyright (C) 2000-2002  Maxim Krasnyansky <[e-mail]>
 *  Copyright (C) 2003-2005  Marcel Holtmann <[e-mail]>
 *
 *
 *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *
 *  $Id: parser.c,v 1.25 2005/02/01 14:36:59 holtmann Exp $
 */

#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <ctype.h>

#include <sys/types.h>
#include <netinet/in.h>

#include "parser.h"
#include "rfcomm.h"

struct parser_t parser;

void init_parser(unsigned long flags, unsigned long filter,
		unsigned short defpsm, unsigned short defcompid)
{
	if ((flags & DUMP_RAW) && !(flags & DUMP_TYPE_MASK))
		flags |= DUMP_HEX;

	parser.flags     = flags;
	parser.filter    = filter;
	parser.defpsm    = defpsm;
	parser.defcompid = defcompid;
	parser.state     = 0;
}

#define PROTO_TABLE_SIZE 20

static struct {
	uint16_t handle;
	uint16_t psm;
	uint8_t  channel;
	uint32_t proto;
} proto_table[PROTO_TABLE_SIZE];

void set_proto(uint16_t handle, uint16_t psm, uint8_t channel, uint32_t proto)
{
	int i, pos = -1;

	if (psm > 0 && psm < 0x1000 && !channel)
		return;

	if (!psm && channel)
		psm = RFCOMM_PSM; 

	for (i = 0; i < PROTO_TABLE_SIZE; i++) {
		if (proto_table[i].handle == handle && proto_table[i].psm == psm && proto_table[i].channel == channel) {
			pos = i;
			break;
		}

		if (pos < 0 && !proto_table[i].handle && !proto_table[i].psm && !proto_table[i].channel)
			pos = i;
	}

	if (pos < 0)
		return;

	proto_table[pos].handle  = handle;
	proto_table[pos].psm     = psm;
	proto_table[pos].channel = channel;
	proto_table[pos].proto   = proto;
}

uint32_t get_proto(uint16_t handle, uint16_t psm, uint8_t channel)
{
	int i, pos = -1;

	if (!psm && channel)
		psm = RFCOMM_PSM;

	for (i = 0; i < PROTO_TABLE_SIZE; i++) {
		if (proto_table[i].handle == handle && proto_table[i].psm == psm && proto_table[i].channel == channel)
			return proto_table[i].proto;

		if (!proto_table[i].handle) {
			if (proto_table[i].psm == psm && proto_table[i].channel == channel)
				pos = i;
		}
	}

	return (pos < 0) ? 0 : proto_table[pos].proto;
}

void ascii_dump(int level, struct frame *frm, int num)
{
	unsigned char *buf = frm->ptr;
	register int i, n;

	if ((num < 0) || (num > frm->len))
		num = frm->len;

	for (i = 0, n = 1; i < num; i++, n++) {
		if (n == 1)
			p_indent(level, frm);
		printf("%1c ", isprint(buf[i]) ? buf[i] : '.');
		if (n == DUMP_WIDTH) {
			printf("\n");
			n = 0;
		}
	}
	if (i && n != 1)
		printf("\n");
}

void hex_dump(int level, struct frame *frm, int num)
{
	unsigned char *buf = frm->ptr;
	register int i, n;

	if ((num < 0) || (num > frm->len))
		num = frm->len;

	for (i = 0, n = 1; i < num; i++, n++) {
		if (n == 1)
			p_indent(level, frm);
		printf("%2.2X ", buf[i]);
		if (n == DUMP_WIDTH) {
			printf("\n");
			n = 0;
		}
	}
	if (i && n != 1)
		printf("\n");
}

void ext_dump(int level, struct frame *frm, int num)
{
	unsigned char *buf = frm->ptr;
	register int i, n = 0, size;

	if ((num < 0) || (num > frm->len))
		num = frm->len;

	while (num > 0) {
		p_indent(level, frm);
		printf("%04x: ", n);

		size = num > 16 ? 16 : num;

		for (i = 0; i < size; i++)
			printf("%02x%s", buf[i], (i + 1) % 8 ? " " : "  ");
		for (i = size; i < 16; i++)
			printf("  %s", (i + 1) % 8 ? " " : "  ");

		for (i = 0; i < size; i++)
			printf("%1c", isprint(buf[i]) ? buf[i] : '.');
		printf("\n");

		buf  += size;
		num  -= size;
		n    += size;
	}
}

void raw_ndump(int level, struct frame *frm, int num)
{
	if (!frm->len)
		return;

	switch (parser.flags & DUMP_TYPE_MASK) {
	case DUMP_ASCII:
		ascii_dump(level, frm, num);
		break;

	case DUMP_HEX:
		hex_dump(level, frm, num);
		break;

	case DUMP_EXT:
		ext_dump(level, frm, num);
		break;
	}
}

void raw_dump(int level, struct frame *frm)
{
	raw_ndump(level, frm, -1);
}