我做了一个简单的基于进程的并行套接字程序。
我的客户端代码到达连接部分并抛出一个Invalid argument错误，而我的服务器没有输出任何东西。只是光标...
我把终端分成两部分来运行代码。
我运行代码：

gcc -o p-server p-server.c -Wall
./p-server

gcc -o p-client p-client.c -Wall

输出为
[C]正在连接...
[C]无法连接到服务器：无效参数

p-server.c

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/types.h>
//#include <sys/wait.h>

#define BUFFSIZE 4096
#define SERVERPORT 7799

int main(void){
    int i, j, s_sock, c_sock;
    struct sockaddr_in server_addr, client_addr;
    socklen_t c_addr_size;
    char buf[BUFFSIZE] = {0};
    char hello[] = "Hello~ I am Server!\n";
    
    //int option = 1;
    //setsockopt(s_sock, SOL_SOCKET, SO_REUSEADDR, &option, sizeof(option));
    
    bzero(&server_addr, sizeof(server_addr));
    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(SERVERPORT);
    server_addr.sin_addr.s_addr = inet_addr("10.0.0.131");

    s_sock = socket(AF_INET, SOCK_STREAM, 0);

  
    if (bind(s_sock, (struct sockaddr *) &server_addr, sizeof(server_addr)) == -1) {
        perror("[S] Can't bind a socket");
        exit(1);
    }

    if(listen(s_sock, 5)) {
        perror("[S] Can't listen");
        exit(1);
    }
    
    c_addr_size = sizeof(client_addr);

    
    for ( i=0; i<3; i++) {
        if ((c_sock = accept(s_sock, (struct sockaddr *) &client_addr, sizeof(client_addr))) == -1 ){
            perror("[S] Can't accept a connection");
            exit(1);
        }

        printf("[S] Connected: client IP addr=%s port=%d\n", inet_ntoa(client_addr.sin_addr), ntohs(client_addr.sin_port));

        
        //fork
        switch(fork()){
            case 0:
                close(s_sock);
                //1. say hello to client
                if(send(c_sock, hello, sizeof(hello)+1, 0) == -1) {
                    perror("[S] Can't send message");
                    exit(1);
                }

                printf("[S] I said Hello to Client!\n");

                //2. recv msg from client
                if(recv(c_sock, buf, BUFFSIZE, 0) == -1) {
                    perror("[S] Can't receive message");
                    exit(1);
                }

                printf("[S] Client says: %s\n", buf);
                exit(0);
        } 
        
        close(c_sock);
    }

    
    /*
    for(j=0; j<3; j++){
        wait(&status);
        printf("Patren waits %d\n"), wstatus;
    }*/
}

p-client.c

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

#define BUFFSIZE 4096
#define SERVERPORT 7799

int main(void){
    int c_sock;
    struct sockaddr_in server_addr;
    socklen_t c_addr_size;
    char buf[BUFFSIZE] = {0};
    char hello[] = "Hi~I am Client!\n";

    if((c_sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
        perror("socket");
        exit(1);
    }
    
    bzero(&server_addr, sizeof(server_addr));
    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(SERVERPORT);
    server_addr.sin_addr.s_addr = inet_addr("10.0.0.131");

    printf("[C] Connecting...\n");

    if (connect(c_sock, (struct sockaddr *) &server_addr, sizeof(server_addr) == -1)) {
        perror("[C] Can't connect to a Server");
        exit(1);
    }

    printf("[C] connected!\n");

    //1. recv msg from server (maybe it's "hello")
    if (recv(c_sock, buf, BUFFSIZE, 0) == -1) {
        perror("[C] Can't receive message");
        exit(1);
    }

    printf("[C] Server says: %s\n", buf);

    //2. say hi to server
    if(send(c_sock, hello, sizeof(hello)+1, 0) == -1) {
        perror("[C] Can't send message");
        exit(1);
    }

    printf("[C] I said Hi to Server!!\n");

    printf("[C] I am going to sleep...\n");
    sleep(10);

    close(c_sock);

    return 0;
}