mirror of
https://github.com/kissste/rtl8710_Raw_Packets.git
synced 2024-11-28 01:00:29 +00:00
108 lines
1.6 KiB
C
108 lines
1.6 KiB
C
// checksum.cpp : Defines the entry point for the console application.
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/*
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Compile command:
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gcc -m32 -o tools/linux/checksum tools/linux/src/checksum.c -static
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*/
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#if 1
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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int main(int argc, char *argv[])
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{
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FILE *fp;
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unsigned int checksum = 0;
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//unsigned char buf[502000]; //MAX FW Size = 512K-44K/2 = 501760
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unsigned char *buf;
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int i;
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int size = 0;
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if(argc != 2) return -1;
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fp = fopen(argv[1], "rb+");
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if(!fp) return -2;
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fseek(fp,0L,SEEK_END);
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size = ftell(fp);
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fseek(fp,0L,SEEK_SET);
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buf = malloc(size+100);
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if(!buf){
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fclose(fp);
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return -3;
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}
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printf("size = %d \n\r", size);
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memset(buf, 0, size+100);
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fread(buf, 1, size, fp);
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for(i=0;i<size;i++){
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checksum += buf[i];
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}
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fseek(fp,0L,SEEK_END);
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fwrite(&checksum, sizeof(int), 1, fp);
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printf("checksum %x\n\r", checksum);
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free(buf);
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fclose(fp);
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}
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#else
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#include <stdio.h>
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#include <string.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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int main(int argc, char *argv[])
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{
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//FILE *fp;
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int fd;
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unsigned int checksum = 0;
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if(argc != 2) return -1;
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//fp = fopen(argv[1], "r+");
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//if(!fp) return -2;
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fd = open(argv[1], O_RDWR);
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if(fd<0) return -2;
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//fseek(fp, 0, SEEK_SET);
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lseek(fd, 0, SEEK_SET);
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int size = lseek(fd, 0, SEEK_END);
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lseek(fd, 0, SEEK_SET);
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printf("size = %d \n\r", size);
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unsigned char buf[size+100];
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memset(buf, 0, size+100);
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read(fd, buf, size);
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for(int i=0;i<size;i++){
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checksum += buf[i];
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}
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lseek(fd, 0, SEEK_END);
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write(fd, &checksum, sizeof(int));
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printf("checksum %x\n\r", checksum);
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close(fd);
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}
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#endif
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