Question

我正在尝试在C中创建一个线程聊天服务器，但是无法弄清楚如何不将消息回显给用户。我希望能够连接两个或更多客户端，并通过我的服务器相互聊天。

我哪里错了：

#include<stdio.h>
#include<string.h>  //strlen
#include<stdlib.h>  //strlen
#include<sys/socket.h>
#include<arpa/inet.h>   //inet_addr
#include<unistd.h>  //write
#include<pthread.h> //for threading , link with lpthread
#include<errno.h>

void *connectionHandler(void * soc_desc);

typedef struct { 
    int reader;
    int writer;
}args;

int main(int arc, char* argv[]){

    int *new_socket;
    int socFD;
    int client_sock;
    struct sockaddr_in serveraddr;
    struct sockaddr_in clientaddr;
    args t1args, t2args;
    int listenFd;
    //socklen_t clientSize= size(struct sockaddr_in);
    int c;
    int acceptFD;
    int client_sockets[2];

    socFD=socket(AF_INET, SOCK_STREAM, 0);

    puts("Socket created");

    bzero((char*) &serveraddr, sizeof(serveraddr));

    serveraddr.sin_family= AF_INET;

    serveraddr.sin_addr.s_addr=INADDR_ANY;

    serveraddr.sin_port= htons(2000);

    bind(socFD, (struct sockaddr*) &serveraddr, sizeof(serveraddr));

    puts("bind done");

    listen(socFD, 3);

    puts("Waiting for incoming connections...");
    c= sizeof(struct sockaddr_in);

    while((client_sock=accept(socFD, (struct sockaddr *)&clientaddr,(socklen_t *)&c)))
    {

        printf("%d", client_sock);
        puts("IN WHILE LOOP");

        pthread_t t1;
        new_socket= malloc(1);
        *new_socket=client_sock;

        if(pthread_create(&t1, NULL, connectionHandler, (void *)new_socket)<0){
                perror("Could not create thread");
                return -1;
        }
    }

    if(client_sock < 0)
    {
        perror("accept failed");
        return -1;
    }

        return 0;
}

void *connectionHandler(void * soc_desc)
{
    //Get the socket descriptor
//      args *temp= (args*)soc_desc; 
        int sock= *(int*)soc_desc;
        int read_size;
        char *message , client_message[2000];
        char buff[80];
/*
        while(1){
             bzero(buff,sizeof(buff));
             recv(temp->reader,buff,sizeof(buff),0);
             send(temp->writer,buff,sizeof(buff),0);

        }*/
    //Receive a message from client
        while( (read_size = recv(sock , client_message , 2000 , 0)) >0 )
        {
            //Send the message back to client
            write(sock, client_message ,strlen(client_message));
        }

        if(read_size == 0)
        {
            puts("Client disconnected");
            fflush(stdout);
        }
        else if(read_size == -1)
        {
            perror("recv failed");
        }

        //Free the socket pointer
        free(soc_desc);
        return 0;
}

Answer 1

http://beej.us/guide/bgnet/html/single/bgnet.html

我大约3年前用C做套接字编程，这就是我所遵循的。帮助了我很多。

聊天服务器套接字

1 个答案: