otrx: new package with tiny app verifying TRX images

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>

SVN-Revision: 45315

package/utils/otrx/Makefile

@@ -0,0 +1,43 @@
+#
+# Copyright (C) 2015 Rafał Miłecki <zajec5@gmail.com>
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=otrx
+PKG_RELEASE:=1
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/otrx
+  SECTION:=utils
+  CATEGORY:=Base system
+  TITLE:=Utility for opening (analyzing) TRX firmware images
+  MAINTAINER:=Rafał Miłecki <zajec5@gmail.com>
+  DEPENDS:=@TARGET_brcm47xx||@TARGET_bcm53xx
+endef
+
+define Package/otrx/description
+ This package contains an utility that allows validating TRX images.
+endef
+
+define Build/Prepare
+	mkdir -p $(PKG_BUILD_DIR)
+	$(CP) ./src/* $(PKG_BUILD_DIR)/
+endef
+
+define Build/Compile
+	$(MAKE) -C $(PKG_BUILD_DIR) \
+		CC="$(TARGET_CC)" \
+		CFLAGS="$(TARGET_CFLAGS) -Wall"
+endef
+
+define Package/otrx/install
+	$(INSTALL_DIR) $(1)/usr/bin
+	$(INSTALL_BIN) $(PKG_BUILD_DIR)/otrx $(1)/usr/bin/
+endef
+
+$(eval $(call BuildPackage,otrx))

package/utils/otrx/src/Makefile

@@ -0,0 +1,7 @@
+all: otrx
+
+otrx:
+	$(CC) $(CFLAGS) -o $@ otrx.c
+
+clean:
+	rm -f otrx

package/utils/otrx/src/otrx.c

@@ -0,0 +1,237 @@
+/*
+ * otrx
+ *
+ * Copyright (C) 2015 Rafał Miłecki <zajec5@gmail.com>
+ *
+ * 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.
+ */
+
+#include <errno.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#if __BYTE_ORDER == __BIG_ENDIAN
+#define cpu_to_le32(x)	bswap_32(x)
+#define le32_to_cpu(x)	bswap_32(x)
+#elif __BYTE_ORDER == __LITTLE_ENDIAN
+#define cpu_to_le32(x)	(x)
+#define le32_to_cpu(x)	(x)
+#else
+#error "Unsupported endianness"
+#endif
+
+#define TRX_MAGIC			0x30524448
+#define TRX_FLAGS_OFFSET		12
+
+struct trx_header {
+	uint32_t magic;
+	uint32_t length;
+	uint32_t crc32;
+	uint16_t flags;
+	uint16_t version;
+	uint32_t offset[3];
+};
+
+enum mode {
+	MODE_UNKNOWN,
+	MODE_CHECK,
+};
+
+enum mode mode = MODE_UNKNOWN;
+
+char *trx_path;
+size_t trx_offset = 0;
+
+/**************************************************
+ * CRC32
+ **************************************************/
+
+uint32_t otrx_crc32(uint8_t *buf, size_t len) {
+	static const uint32_t t[] = {
+		0x00000000, 0x77073096, 0xee0e612c, 0x990951ba,
+		0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
+		0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
+		0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
+		0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
+		0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
+		0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec,
+		0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
+		0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
+		0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
+		0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940,
+		0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
+		0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116,
+		0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
+		0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
+		0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
+		0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a,
+		0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
+		0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818,
+		0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
+		0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
+		0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
+		0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c,
+		0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
+		0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
+		0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
+		0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
+		0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
+		0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086,
+		0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
+		0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4,
+		0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
+		0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
+		0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
+		0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
+		0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
+		0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe,
+		0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
+		0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
+		0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
+		0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252,
+		0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
+		0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60,
+		0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
+		0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
+		0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
+		0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04,
+		0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
+		0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a,
+		0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
+		0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
+		0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
+		0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e,
+		0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
+		0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
+		0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
+		0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
+		0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
+		0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0,
+		0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
+		0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6,
+		0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
+		0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
+		0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d,
+	};
+	uint32_t crc = 0xffffffff;
+
+	while (len) {
+		crc = t[(crc ^ *buf) & 0xff] ^ (crc >> 8);
+		buf++;
+		len--;
+	}
+
+	return crc;
+}
+
+/**************************************************
+ * Check
+ **************************************************/
+
+static int otrx_check() {
+	FILE *trx;
+	struct trx_header hdr;
+	size_t bytes, length;
+	uint8_t *buf;
+	uint32_t crc32;
+	int err = 0;
+
+	trx = fopen(trx_path, "r");
+	if (!trx) {
+		fprintf(stderr, "Couldn't open %s\n", trx_path);
+		err = -EACCES;
+		goto out;
+	}
+
+	fseek(trx, trx_offset, SEEK_SET);
+	bytes = fread(&hdr, 1, sizeof(hdr), trx);
+	if (bytes != sizeof(hdr)) {
+		fprintf(stderr, "Couldn't read %s header\n", trx_path);
+		err =  -EIO;
+		goto err_close;
+	}
+
+	if (le32_to_cpu(hdr.magic) != TRX_MAGIC) {
+		fprintf(stderr, "Invalid TRX magic: 0x%08x\n", le32_to_cpu(hdr.magic));
+		err =  -EINVAL;
+		goto err_close;
+	}
+
+	length = le32_to_cpu(hdr.length);
+	buf = malloc(length);
+	if (!buf) {
+		fprintf(stderr, "Couldn't alloc %d B buffer\n", length);
+		err =  -ENOMEM;
+		goto err_close;
+	}
+
+	fseek(trx, trx_offset, SEEK_SET);
+	bytes = fread(buf, 1, length, trx);
+	if (bytes != length) {
+		fprintf(stderr, "Couldn't read %d B of data from %s\n", length, trx_path);
+		err =  -ENOMEM;
+		goto err_free_buf;
+	}
+
+	crc32 = otrx_crc32(buf + TRX_FLAGS_OFFSET, length - TRX_FLAGS_OFFSET);
+	if (crc32 != le32_to_cpu(hdr.crc32)) {
+		fprintf(stderr, "Invalid data crc32: 0x%08x instead of 0x%08x\n", crc32, le32_to_cpu(hdr.crc32));
+		err =  -EINVAL;
+		goto err_free_buf;
+	}
+
+	printf("Found a valid TRX version %d\n", le32_to_cpu(hdr.version));
+
+err_free_buf:
+	free(buf);
+err_close:
+	fclose(trx);
+out:
+	return err;
+}
+
+/**************************************************
+ * Start
+ **************************************************/
+
+static void parse_options(int argc, char **argv) {
+	int c;
+
+	while ((c = getopt(argc, argv, "c:o:")) != -1) {
+		switch (c) {
+		case 'c':
+			mode = MODE_CHECK;
+			trx_path = optarg;
+			break;
+		case 'o':
+			trx_offset = atoi(optarg);
+			break;
+		}
+	}
+}
+
+static void usage() {
+	printf("Usage:\n");
+	printf("\n");
+	printf("Checking TRX file:\n");
+	printf("\t-c file\t\tcheck if file is a valid TRX\n");
+	printf("\t-o offset\toffset of TRX data in file (default: 0)\n");
+}
+
+int main(int argc, char **argv) {
+	parse_options(argc, argv);
+
+	switch (mode) {
+	case MODE_CHECK:
+		return otrx_check();
+	default:
+		usage();
+	}
+
+	return 0;
+}