Linux c实现服务端与客户端聊天

主要利用socket通信实现，具体代码如下

客户端：

 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
 #include <unistd.h>
 #define MAXLINE 511

 char *EXIT_STRING = "exit";
 int input_and_send(int sd);
 int recv_and_print(int sd);

 int main(int argc, char *argv[]){
     pid_t pid;
      int s;
     static struct sockaddr_in servaddr;

     if(argc != ){
         printf("사용법: %s server_ip port \n",argv[]);
         exit();
     }
     if((s = socket(PF_INET, SOCK_STREAM, )) < ){
         printf("Client: Can't open stream socket.\n");
         exit();
     }

     bzero((char *)&servaddr,sizeof(servaddr));
     servaddr.sin_family = AF_INET;
     inet_pton(AF_INET, argv[], &servaddr.sin_addr);
     servaddr.sin_port = htons(atoi(argv[]));

     if(connect(s,(struct sockaddr *)&servaddr,sizeof(servaddr)) < ){
         printf("Client: can't connect to server.\n");
         exit();
     }
     if( (pid=fork())> )
         input_and_sent1(s);
     else if(pid == )
         recv_and_print(s);
     close(s);
     return ;
 }

 int input_and_sent1(int sd){

     char buf[MAXLINE+];
     int nbyte;
     while(fgets(buf, sizeof(buf),stdin) != NULL){
         nbyte = strlen(buf);
         write(sd, buf, strlen(buf));
         if(strstr(buf,EXIT_STRING) != NULL){
             puts("Good Bye!");
             close(sd);
             exit();
         }
     }
      return ;
 }

 int recv_and_print(int sd){
     char buf[MAXLINE+];
     int nbyte;
     while(){
         if((nbyte=read(sd, buf,MAXLINE))<){
             perror("read fail");
             close(sd);
             exit();
         }
     buf[nbyte] = ;
     if(strstr(buf,EXIT_STRING) != NULL)
         break;
     printf("Girl: %s",buf);
     }
     return ;
 }

服务器端：

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

char *EXIT_STRING = "exit";
int recv_and_print(int sd);
int input_and_send(int sd);
#define MAXLINE 511

int main(int argc, char *argv[])
{
    struct sockaddr_in cliaddr, servaddr;
    int listen_sock,accp_sock,addrlen = sizeof(cliaddr);
    pid_t pid;
    if(argc != ){
        printf("사용법: %s port\n",argv[]);
        exit();
    }

    if((listen_sock=socket(PF_INET, SOCK_STREAM, )) < ){
        perror("socket fail");
        exit();
    }

    bzero((char *)&servaddr, sizeof(servaddr));
    servaddr.sin_family = AF_INET;
    servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
    servaddr.sin_port = htons(atoi(argv[]));

    if(bind(listen_sock, (struct sockaddr *)&servaddr, sizeof(servaddr)) < ){
        perror("bind fail");
        exit();
    }
    puts("等待连接......");
    listen(listen_sock, );

    if((accp_sock = accept(listen_sock,(struct sockaddr *)&cliaddr, &addrlen)) < ){
        perror("accept fail");
        exit();
    }

    puts("连接成功.....");
    if((pid = fork()) > )
        input_and_send(accp_sock);
    else if(pid == )
        recv_and_print(accp_sock);
    close(listen_sock);
    close(accp_sock);
    return ;
}

int input_and_send(int sd){
    char buf[MAXLINE+];
    int nbyte;
    while(fgets(buf, sizeof(buf),stdin) != NULL){
        nbyte = strlen(buf);
        write(sd, buf ,strlen(buf));
        if(strstr(buf, EXIT_STRING) != NULL){
            puts("Good Bye.");
            close(sd);
            exit();
        }
    }
    return ;
}

int recv_and_print(int sd){
    char buf[MAXLINE+];
    int nbyte;
    while(){
        if((nbyte=read(sd, buf, MAXLINE)) < ){
            perror("read fail");
            close(sd);
            exit();
        }
    buf[nbyte] = ;
    if(strstr(buf, EXIT_STRING) != NULL)
        break;
    printf("Harley Gwak: %s",buf);
    }
    return ;
}

第一次写博客，一直都是伸手党，今天就把我之前写过的东西分享下，代码正常运行的，仅供参考。