Socket通讯

最新推荐文章于 2025-10-10 09:54:17 发布

原创最新推荐文章于 2025-10-10 09:54:17 发布 · 978 阅读

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文章标签：

#socket #struct #stream #通讯 #server #服务器

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这是一个同学做的。放在这里供以后参考。

##############################

server.c

##############################

#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
/**
*title: 似乎是之前的上机练习
*Author:Eric Jia
*desc: 网络编程似乎是要发送一段消息给另一方接收，互相聊天
*add: 这是客户端，运行是需要先运行服务端，然后再运行客户端。客户端运行时候请把服务器ip作为参数加入。
* 比如本机通讯的话，再运行了服务端之后，运行客户端： ./client 127.0.0.1
* 然后客户端和服务端就可以聊high了。。
*/
#define SEND_MAX 256
#define PORT 7227
#define MAX_CONNECTION 10

void err_exit(char* msg){
printf("%s",msg);
exit(1);
return;
}

void err(char* msg){
printf("%s",msg);
return ;
}

void recv_try(int sockfd){
int n;
char buf[SEND_MAX];
while((n=recv(sockfd, buf, SEND_MAX, 0))>0){
  printf("**Others Said:**\r\n");
  printf("%s\r\n", buf);
  printf("******\n\n");
}
if(n<0)
  printf("**Recive Error**\n");
else
  printf("**Seems Client Has Disconnected Connection**\n");
}

int main(int argc, char* argv[]){
int  sock;
struct sockaddr_in sin;

  if((sock=socket(AF_INET, SOCK_STREAM, 0))<0){
  err_exit("**Seems a Error Caused In Getting a Socket :( **\n");
}
sin.sin_family = AF_INET;
sin.sin_addr.s_addr= inet_addr("127.0.0.1");
sin.sin_port = PORT;
if(bind(sock,(struct sockaddr*)&sin,sizeof(sin)))
  err_exit("Err Bind\n");
else if(listen(sock,MAX_CONNECTION))
  err_exit("ERR Listen\n");
struct sockaddr_in client;
int sin_size=sizeof(client);
int new_sock = accept(sock, (struct sockaddr* )&client, (socklen_t* )&sin_size);

pid_t pid;
if((pid=fork())<0)
  err_exit("Fork Error\n");
else if(pid==0){
  recv_try(new_sock);
}else{
  while(1){
   char buf[SEND_MAX];
   memset(buf,0,SEND_MAX);
   gets(buf);
   if(!strcmp(buf,"::cmd_exit")){
    close(new_sock);
    break;
   }
   write(new_sock,buf,SEND_MAX);
   printf("\n");
  }
}

return 0;
}

#########################

client.c

########################

void err_exit(char* msg){
printf("%s",msg);
exit(1);
return;
}

void err(char* msg){
printf("%s",msg);
return ;
}

int main(int argc, char* argv[]){
int  sock;
struct sockaddr_in sin;

if(argc!=2){
  err_exit("usage: [ProgramName] [HostIP]\r\n");
}else if((sock=socket(AF_INET, SOCK_STREAM, 0))<0){
  err_exit("**Seems a Error Caused In Getting a Socket :( **\r\n");
}
sin.sin_family = AF_INET;
sin.sin_addr.s_addr= inet_addr(argv[1]);
sin.sin_port = PORT;

if(connect(sock, (struct sockaddr*)&sin, sizeof(sin))<0) {
  err_exit("**Seems the Server is Not Ready :( **\r\n");
}else{
  printf("**Successful Connected! ;D**\n\n");
}
pid_t pid;
if((pid=fork())<0)
  err_exit("Fork Error\r\n");
else if(pid==0){
  recv_try(sock);
}else{
  while(1){
   char buf[SEND_MAX];
   memset(buf,0,SEND_MAX);
   gets(buf);
   if(!strcmp(buf,"::cmd_exit")){
    close(sock);
    break;
   }
   write(sock,buf,SEND_MAX);
   printf("\n");
  }
}
return 0;
}