net/tipc/Kconfig


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#
# TIPC configuration
#

menuconfig TIPC
	tristate "The TIPC Protocol (EXPERIMENTAL)"
	depends on INET && EXPERIMENTAL
	---help---
	  The Transparent Inter Process Communication (TIPC) protocol is
	  specially designed for intra cluster communication. This protocol
	  originates from Ericsson where it has been used in carrier grade
	  cluster applications for many years.

	  For more information about TIPC, see http://tipc.sourceforge.net.

	  This protocol support is also available as a module ( = code which
	  can be inserted in and removed from the running kernel whenever you
	  want). The module will be called tipc. If you want to compile it
	  as a module, say M here and read <file:Documentation/kbuild/modules.txt>.

	  If in doubt, say N.

if TIPC

config TIPC_ADVANCED
	bool "Advanced TIPC configuration"
	default n
	help
	  Saying Y here will open some advanced configuration for TIPC.
	  Most users do not need to bother; if unsure, just say N.

config TIPC_PORTS
	int "Maximum number of ports in a node"
	depends on TIPC_ADVANCED
	range 127 65535
	default "8191"
	help
	  Specifies how many ports can be supported by a node.
	  Can range from 127 to 65535 ports; default is 8191.

	  Setting this to a smaller value saves some memory,
	  setting it to higher allows for more ports.

endif # TIPC
/*
 * Parser/loader for IHEX formatted data.
 *
 * Copyright © 2008 David Woodhouse <dwmw2@infradead.org>
 * Copyright © 2005 Jan Harkes <jaharkes@cs.cmu.edu>
 *
 * 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.
 */

#include <stdint.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#define _GNU_SOURCE
#include <getopt.h>


struct ihex_binrec {
	struct ihex_binrec *next; /* not part of the real data structure */
        uint32_t addr;
        uint16_t len;
        uint8_t data[];
};

/**
 * nybble/hex are little helpers to parse hexadecimal numbers to a byte value
 **/
static uint8_t nybble(const uint8_t n)
{
       if      (n >= '0' && n <= '9') return n - '0';
       else if (n >= 'A' && n <= 'F') return n - ('A' - 10);
       else if (n >= 'a' && n <= 'f') return n - ('a' - 10);
       return 0;
}

static uint8_t hex(const uint8_t *data, uint8_t *crc)
{
       uint8_t val = (nybble(data[0]) << 4) | nybble(data[1]);
       *crc += val;
       return val;
}

static int process_ihex(uint8_t *data, ssize_t size);
static void file_record(struct ihex_binrec *record);
static int output_records(int outfd);

static int sort_records = 0;
static int wide_records = 0;
static int include_jump = 0;

static int usage(void)
{
	fprintf(stderr, "ihex2fw: Convert ihex files into binary "
		"representation for use by Linux kernel\n");
	fprintf(stderr, "usage: ihex2fw [<options>] <src.HEX> <dst.fw>\n");
	fprintf(stderr, "       -w: wide records (16-bit length)\n");
	fprintf(stderr, "       -s: sort records by address\n");
	fprintf(stderr, "       -j: include records for CS:IP/EIP address\n");
	return 1;
}

int main(int argc, char **argv)
{
	int infd, outfd;
	struct stat st;
	uint8_t *data;
	int opt;

	while ((opt = getopt(argc, argv, "wsj")) != -1) {
		switch (opt) {
		case 'w':
			wide_records = 1;
			break;
		case 's':
			sort_records = 1;
			break;
		case 'j':
			include_jump = 1;
			break;
			return usage();
		}
	}

	if (optind + 2 != argc)
		return usage();

	if (!strcmp(argv[optind], "-"))
	    infd = 0;
	else
		infd = open(argv[optind], O_RDONLY);
	if (infd == -1) {
		fprintf(stderr, "Failed to open source file: %s",
			strerror(errno));
		return usage();
	}
	if (fstat(infd, &st)) {
		perror("stat");
		return 1;
	}
	data = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, infd, 0);
	if (data == MAP_FAILED) {
		perror("mmap");
		return 1;
	}

	if (!strcmp(argv[optind+1], "-"))
	    outfd = 1;
	else
		outfd = open(argv[optind+1], O_TRUNC|O_CREAT|O_WRONLY, 0644);
	if (outfd == -1) {
		fprintf(stderr, "Failed to open destination file: %s",
			strerror(errno));
		return usage();
	}
	if (process_ihex(data, st.st_size))
		return 1;

	return output_records(outfd);
}

static int process_ihex(uint8_t *data, ssize_t size)
{
	struct ihex_binrec *record;
	uint32_t offset = 0;
	uint32_t data32;
	uint8_t type, crc = 0, crcbyte = 0;
	int i, j;
	int line = 1;
	int len;

	i = 0;
next_record:
	/* search for the start of record character */
	while (i < size) {
		if (data[i] == '\n') line++;
		if (data[i++] == ':') break;
	}

	/* Minimum record length would be about 10 characters */
	if (i + 10 > size) {
		fprintf(stderr, "Can't find valid record at line %d\n", line);
		return -EINVAL;
	}

	len = hex(data + i, &crc); i += 2;
	if (wide_records) {
		len <<= 8;
		len += hex(data + i, &crc); i += 2;
	}
	record = malloc((sizeof (*record) + len + 3) & ~3);
	if (!record) {
		fprintf(stderr, "out of memory for records\n");
		return -ENOMEM;
	}
	memset(record, 0, (sizeof(*record) + len + 3) & ~3);
	record->len = len;

	/* now check if we have enough data to read everything */
	if (i + 8 + (record->len * 2) > size) {
		fprintf(stderr, "Not enough data to read complete record at line %d\n",
			line);
		return -EINVAL;
	}

	record->addr  = hex(data + i, &crc) << 8; i += 2;
	record->addr |= hex(data + i, &crc); i += 2;
	type = hex(data + i, &crc); i += 2;

	for (j = 0; j < record->len; j++, i += 2)
		record->data[j] = hex(data + i, &crc);

	/* check CRC */
	crcbyte = hex(data + i, &crc); i += 2;
	if (crc != 0) {
		fprintf(stderr, "CRC failure at line %d: got 0x%X, expected 0x%X\n",
			line, crcbyte, (unsigned char)(crcbyte-crc));
		return -EINVAL;
	}

	/* Done reading the record */
	switch (type) {
	case 0:
		/* old style EOF record? */
		if (!record->len)
			break;

		record->addr += offset;
		file_record(record);
		goto next_record;

	case 1: /* End-Of-File Record */
		if (record->addr || record->len) {
			fprintf(stderr, "Bad EOF record (type 01) format at line %d",
				line);
			return -EINVAL;
		}
		break;

	case 2: /* Extended Segment Address Record (HEX86) */
	case 4: /* Extended Linear Address Record (HEX386) */
		if (record->addr || record->len != 2) {
			fprintf(stderr, "Bad HEX86/HEX386 record (type %02X) at line %d\n",
				type, line);
			return -EINVAL;
		}

		/* We shouldn't really be using the offset for HEX86 because
		 * the wraparound case is specified quite differently. */
		offset = record->data[0] << 8 | record->data[1];
		offset <<= (type == 2 ? 4 : 16);
		goto next_record;

	case 3: /* Start Segment Address Record */
	case 5: /* Start Linear Address Record */
		if (record->addr || record->len != 4) {
			fprintf(stderr, "Bad Start Address record (type %02X) at line %d\n",
				type, line);
			return -EINVAL;
		}

		memcpy(&data32, &record->data[0], sizeof(data32));
		data32 = htonl(data32);
		memcpy(&record->data[0], &data32, sizeof(data32));

		/* These records contain the CS/IP or EIP where execution
		 * starts. If requested output this as a record. */
		if (include_jump)
			file_record(record);
		goto next_record;

	default:
		fprintf(stderr, "Unknown record (type %02X)\n", type);
		return -EINVAL;
	}

	return 0;
}

static struct ihex_binrec *records;

static void file_record(struct ihex_binrec *record)
{
	struct ihex_binrec **p = &records;

	while ((*p) && (!sort_records || (*p)->addr < record->addr))
		p = &((*p)->next);

	record->next = *p;
	*p = record;
}

static int output_records(int outfd)
{
	unsigned char zeroes[6] = {0, 0, 0, 0, 0, 0};
	struct ihex_binrec *p = records;

	while (p) {
		uint16_t writelen = (p->len + 9) & ~3;

		p->addr = htonl(p->addr);
		p->len = htons(p->len);
		if (write(outfd, &p->addr, writelen) != writelen)
			return 1;
		p = p->next;
	}
	/* EOF record is zero length, since we don't bother to represent
	   the type field in the binary version */
	if (write(outfd, zeroes, 6) != 6)
		return 1;
	return 0;
}