下面是两个linux下网络传输程序，server.c和client.c，分别发送和接收照片数据。照片大小32K。编译后在ubuntu下运行正常图片正确，但交叉编译后server在开发板上运行，client在ubuntu下运行，接收到的图片数据能显示，但有错位。请大家帮忙分析一下。
server.c如下：
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <sys/types.h>
#include <string.h>
#include "proto.h"
#define BUFSIZE 128 //1024
#define STRSIZE 40
static void server_job(int sd) {
char buf[BUFSIZE];
int len, i, count;
char jpgbuf[1024 * 500];
char statebuf[40];
FILE *input_file;
if ((input_file = fopen("1.jpg", "rb")) == NULL) {
fprintf(stderr, "can't open 1.jpg\n");
return;
}
fread(jpgbuf, 32768, 1, input_file);
for (count = 0; count < 32; count++) {
if (send(sd, jpgbuf+count*1024, 1024, 0) < 0) {
printf("Send File:\t JPEG picture Failed\n");
}
}
}
int main() {
char ipstr[STRSIZE];
int sd, newsd;
struct sockaddr_in laddr, raddr;
socklen_t raddr_len;
pid_t pid;
sd = socket(AF_INET, SOCK_STREAM, 0/*IPPROTO_TCP,IPPROTO_SCTP*/);
if (sd < 0) {
perror("socket()");
exit(1);
}
int val = 1;
if (setsockopt(sd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val)) < 0) {
perror("setsockopt(SO_REUSEADDR)");
}
laddr.sin_family = AF_INET;
laddr.sin_port = htons(atoi(SERVERPORT));
inet_pton(AF_INET, "0.0.0.0", &laddr.sin_addr);
if (bind(sd, (void *) &laddr, sizeof(laddr)) < 0) {
perror("bind()");
exit(1);
}
if (listen(sd, 200) < 0) {
perror("listen()");
exit(1);
}
raddr_len = sizeof(raddr); /*!!!!!!!!*/
while (1) {
newsd = accept(sd, (void *) &raddr, &raddr_len);
if (newsd < 0) {
perror("accept()");
exit(1);
}
pid = fork();
if (pid < 0) {
fprintf(stderr, "fork()");
exit(1);
}
if (pid == 0) {
close(sd);
inet_ntop(AF_INET, &raddr.sin_addr, ipstr, STRSIZE);
printf("Client:%s:%d\n", ipstr, ntohs(raddr.sin_port));
server_job(newsd);
close(newsd);
exit(1);
}
close(newsd);
wait(NULL);
}
exit(0);
}
client.c如下：
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include "proto.h"
/* Address to accept any incoming messages. */
#define INADDR_ANY ((in_addr_t) 0x00000000)
#define BUFFER_SIZE 1024
/* Set N bytes of S to 0. */
extern void bzero(void *__s, size_t __n)
__THROW __nonnull ((1));
char recieveBuffer[BUFFER_SIZE];
int leftRecieveChars;
int currentIndex = 0;
int sd;
char getOneChar() {
currentIndex++;
if (leftRecieveChars == 0) {
bzero(recieveBuffer, BUFFER_SIZE);
do {
leftRecieveChars = recv(sd, recieveBuffer, BUFFER_SIZE, 0);
if (leftRecieveChars < 0) {
printf("Server Recieve Data Failed!\n");
exit(1);
}
} while (leftRecieveChars == 0);
currentIndex = 0;
}
leftRecieveChars--;
return recieveBuffer[currentIndex];
}
int main(int argc, char *argv[]) {
FILE *fp;
int i, jpegSize;
long long stamp;
struct sockaddr_in raddr;
char numberBuf[20];
if (argc < 2) {
fprintf(stderr, "Usage...\n");
exit(1);
}
//创建用于internet的流协议(TCP)socket,用client_socket代表客户机socket
sd = socket(AF_INET, SOCK_STREAM, 0);
if (sd < 0) {
perror("socket()");
exit(1);
}
//设置一个socket地址结构client_addr,代表客户机internet地址, 端口
struct sockaddr_in client_addr;
bzero(&client_addr, sizeof(client_addr)); //把一段内存区的内容全部设置为0
client_addr.sin_family = AF_INET; //internet协议族
client_addr.sin_addr.s_addr = htons(INADDR_ANY); //INADDR_ANY表示自动获取本机地址
client_addr.sin_port = htons(0); //0表示让系统自动分配一个空闲端口
//把客户机的socket和客户机的socket地址结构联系起来
if (bind(sd, (struct sockaddr*) &client_addr, sizeof(client_addr))) {
printf("Client Bind Port Failed!\n");
exit(1);
}
raddr.sin_family = AF_INET;
raddr.sin_port = htons(atoi(SERVERPORT));
inet_pton(AF_INET, argv[1], &raddr.sin_addr);
if (connect(sd, (void *) &raddr, sizeof(raddr)) < 0) {
perror("connect()");
exit(1);
}
int count = 0, cnt = 0;
char name[20];
//while (1) {
printf("Begin recieve data.the num is %d!\n", cnt);
cnt++;
jpegSize = 32768;
char fileBuf[jpegSize];
bzero(fileBuf, jpegSize);
//printf("Begin receive JPG date !\n");
for (count = 0; count < 32; count++) {
leftRecieveChars = recv(sd, fileBuf + count * 1024, 1024, 0);
}
sprintf(name, "%d.jpg", count);
count++;
if (count >= 7)
count = 0;
fp = fopen(name, "w");
int writeLength = fwrite(fileBuf, sizeof(char), 32768, fp);
//printf("writeLength to file : %d\n", writeLength);
if (writeLength < 32768) {
printf("File:\t%s Write Failed\n", "1.jpeg");
fclose(fp);
exit(1);
}
fclose(fp);
return 0;
}
