#include <stdio.h>

#include <sys/socket.h>

#include <sys/types.h>

#include <string.h>

#include <netinet/in.h>

#include <stdlib.h>

#include <errno.h>

#include <unistd.h>

#include <arpa/inet.h>

#define MAXLINE 1024

int main(int argc,char **argv)

{

    int listenfd,connfd;

    struct sockaddr_in sockaddr;

    char buff[MAXLINE];

    int n;

    memset(&sockaddr,0,sizeof(sockaddr));

    sockaddr.sin_family = AF_INET;

    sockaddr.sin_addr.s_addr = htonl(INADDR_ANY);

    sockaddr.sin_port = htons(10004);

    listenfd = socket(AF_INET,SOCK_STREAM,0);

    bind(listenfd,(struct sockaddr *) &sockaddr,sizeof(sockaddr));

    listen(listenfd,1024);

    printf("Please wait for the client information\n");

    for(;;)

    {

        if((connfd = accept(listenfd,(struct sockaddr*)NULL,NULL))==-1)

        {

            printf("accpet socket error: %s errno :%d\n",strerror(errno),errno);

            continue;

        }

        n = recv(connfd,buff,MAXLINE,0);

        buff[n] = '\0';

        printf("recv msg from client:%s",buff);

        close(connfd);

    }

    close(listenfd);

}

#include <stdio.h>

#include <sys/socket.h>

#include <sys/types.h>

#include <stdlib.h>

#include <netinet/in.h>

#include <errno.h>

#include <string.h>

#include <arpa/inet.h>

#include <unistd.h>

#define MAXLINE 1024

void sendMsgToServer(char *xxx){

    char *servInetAddr = "1.2.3.4";

    int socketfd;

    struct sockaddr_in sockaddr;

    char recvline[MAXLINE],sendline[MAXLINE];

    int n;

    memcpy(sendline,xxx,1000);

    socketfd = socket(AF_INET,SOCK_STREAM,0);

    memset(&sockaddr,0,sizeof(sockaddr));

    sockaddr.sin_family = AF_INET;

    sockaddr.sin_port = htons(10004);

    inet_pton(AF_INET,servInetAddr,&sockaddr.sin_addr);

    if((connect(socketfd,(struct sockaddr*)&sockaddr,sizeof(sockaddr))) < 0 )

    {

        printf("connect error %s errno: %d\n",strerror(errno),errno);

        exit(0);

    }

    printf("send message to server\n");

    if((send(socketfd,sendline,strlen(sendline),0)) < 0)

    {

        printf("send mes error: %s errno : %d",strerror(errno),errno);

        exit(0);

    }

    close(socketfd);

    printf("over\n");

}

int main(int argc,char **argv)

{

    char abc[1000];

    while(fgets(abc,1024,stdin) != EOF){

        sendMsgToServer(abc);

    }

    return 0;

}