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693 user890104 1 
#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <libusb-1.0/libusb.h>
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#include "usb.h"
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#include "dfu.h"
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#include "crc32.h"
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#include "misc.h"
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#include "ipoddfu.h"
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int main(int argc, char *argv[]) {
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	int res = 0;
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	unsigned char reattach = 0, *data;
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	FILE *fp;
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	long int size;
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	unsigned int checksum;
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	if (2 != argc) {
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		fprintf(stderr, "usage: %s <file>\n", argv[0]);
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		return 1;
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	}
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	fp = fopen(argv[1], "r");
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	if (!fp) {
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		perror("fopen");
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		return 1;
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	}
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	size = fgetsize(fp);
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	if (-1L == size) {
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		return 1;
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	}
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	data = (unsigned char *) malloc(size + 4);
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	if ((unsigned long int) size != fread(data, sizeof(unsigned char), size, fp)) {
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		perror("fread");
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		return 1;
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	}
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	if (fclose(fp)) {
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		perror("fclose");
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		return 1;
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	}
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	crc32_init();
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	checksum = crc32(data, size, CRC32_DEFAULT_SEED);
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	memcpy(data + size, &checksum, 4);
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	res = usb_init();
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	if (LIBUSB_SUCCESS == res) {
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		res = usb_find(&reattach);
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	}
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	if (LIBUSB_SUCCESS == res) {
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		res = dfu_send((unsigned long int) size + 4, data);
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	}
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	if (data) {
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		free(data);
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	}
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	if (0 != res) {
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		print_error(res);
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	}
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	if (usb_handle) {
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		usb_close(reattach);
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	}
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	if (usb_ctx) {
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		usb_exit();
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	}
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	if (res < 0) {
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		res = -res;
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	}
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	return res;
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}