嵌入式开发板中使用c的TCP客户端服务器程序arm64 arch

问题描述

我有从 github 下载的 TCP 客户端-服务器 c 程序。代码在主机（x86）中运行良好。但是当我为arm64架构板编译并运行相同的程序时，客户端“连接被拒绝”错误来了。

测试设置和程序

目标板和主机使用单个以太网连接。
分配静态 IP 以便两者都在同一网络中。
目标板和主机都能够 PING 对方。
服务器在 arm64 目标板和主机上的客户端中运行。

输出：

套接字创建成功.. 与服务器的连接失败...：连接被拒绝

观察

当客户端和服务器都在目标板上运行时，连接正在建立。当 TCP 服务器和客户端在两种不同的架构中运行时会遇到此问题。

以下是代码

**// Server code
//#include <netdb.h> 
#include <netinet/in.h> 
#include <stdio.h> 
#include <stdlib.h> 
#include <unistd.h>
#include <string.h> 
#include <sys/socket.h> 
#include <sys/types.h> 
#define MAX 80 
#define PORT 10500
#define SA struct sockaddr 
//print error message and exit process
void die(char *msg)
{
    perror(msg);
    exit(0); // EXIT_FAILURE
}
// Function designed for chat between client and server. 
void func(int sockfd) 
{ 
    char buff[MAX]; 
    int n; 
    // infinite loop for chat 
    for (;;) { 
        bzero(buff,MAX); 
        // read the message from client and copy it in buffer 
        read(sockfd,buff,sizeof(buff)); 
        // print buffer which contains the client contents 
        printf("From client: %s\t To client : ",buff); 
        bzero(buff,MAX); 
        n = 0; 
        // copy server message in the buffer 
        while ((buff[n++] = getchar()) != '\n') 
            ; 
        // and send that buffer to client 
        write(sockfd,sizeof(buff)); 
        // if msg contains "Exit" then server exit and chat ended. 
        if (strncmp("exit",4) == 0) { 
            printf("Server Exit...\n"); 
            break; 
        } 
    } 
} 
// Driver function 
int main() 
{ 
    int sockfd,connfd;
    unsigned int len; 
    struct sockaddr_in servaddr,cli; 
    // socket create and verification 
    sockfd = socket(AF_INET,SOCK_STREAM,0); // same as socket(AF_INET,IPPROTO_TCP)
    if (sockfd == -1)
        die("socket creation Failed...");  
    else
        printf("Socket successfully created..\n"); 
        
    bzero(&servaddr,sizeof(servaddr)); // memset
    // assign IP,PORT 
    servaddr.sin_family = AF_INET; // IPv4
    servaddr.sin_addr.s_addr = htonl(INADDR_ANY); /* host-to-network endian */
    servaddr.sin_port = htons(PORT); /* for listening */
    // Binding newly created socket to given IP and verification 
    if ((bind(sockfd,(SA*)&servaddr,sizeof(servaddr))) != 0) 
        die("socket bind Failed..."); 
    else
        printf("Socket successfully binded..\n"); 
    // Now server is ready to listen and verification 
    if ((listen(sockfd,5)) != 0)   // max 5 connections
        die("Listen Failed...");
    else
        printf("Server listening for any client..\n"); 
        
    len = sizeof(cli); 
    // Accept the data packet from client and verification 
    connfd = accept(sockfd,(SA*)&cli,&len); 
    if (connfd < 0)
        die("server acccept Failed..."); 
    else
        printf("server acccepted the client connection...\n"); 
    // Function for chatting between client and server 
    func(connfd); 
    // After chatting close the socket 
    close(sockfd); 
}**

//client code
// Write CPP code here 
//#include <netdb.h> 
#include <stdio.h> 
#include <stdlib.h> 
#include <unistd.h>
#include <string.h> 
#include <sys/socket.h> 
#include <arpa/inet.h> 
//#include <netinet/in.h> 

#define MAX 80 
#define PORT 10500
#define SA struct sockaddr 

void die(char *msg)
{
    perror(msg);
    exit(0); // EXIT_FAILURE
}

void func(int sockfd) 
{ 
    char buff[MAX]; 
    int n; 
    for (;;) { 
        bzero(buff,sizeof(buff)); 
        printf("Enter the string for sending to server: "); 
        n = 0; 
        while ((buff[n++] = getchar()) != '\n') 
            ; 
        write(sockfd,sizeof(buff));
         
        bzero(buff,sizeof(buff)); 
        read(sockfd,sizeof(buff)); 
        printf("From Server : %s",buff); 
        if ((strncmp(buff,"exit",4)) == 0) { // if Exit message received from Server
            printf("Client Exit...\n"); 
            break; //chat ended
        } 
    } 
} 

int main() 
{ 
    int sockfd; 
    struct sockaddr_in servaddr; 

    // socket create and varification 
    sockfd = socket(AF_INET,IPPROTO_TCP); 
    if (sockfd == -1)
        die("socket creation Failed..."); 
    else
        printf("Socket successfully created..\n"); 
        
    bzero(&servaddr,sizeof(servaddr)); // memset

    // assign IP,PORT 
    servaddr.sin_family = AF_INET; // IPv4
    servaddr.sin_addr.s_addr = inet_addr("127.0.0.1");
    servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
    servaddr.sin_port = htons(PORT); /* for connecting */

    // connect the client socket to server socket 
    if (connect(sockfd,sizeof(servaddr)) != 0)
        die("connection with the server Failed...");
    else
        printf("connected to the server..\n"); 

    // function for chat 
    func(sockfd); 

    // close the socket 
    close(sockfd); 
}

这个问题令人困惑。我请求帮助我解决问题。

解决方法

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c sockets target