linux下Socket编程实例

时间：2010-12-02 来源：bluesky2254

说明：主要有2个文件：tcp_ser.c和tcp_cli.c /*文件1:tcp_ser.c,服务器*/ #include <netinet/in.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <string.h> //服务器 main()
{
int lisenfd,connfd;
struct sockaddr_in ser_addr,cli_addr;
int cli_len;
int len = 0;
char recv_buf[1024];
char send_buf[1024]; lisenfd = socket(AF_INET,SOCK_STREAM,0);
if(-1 == lisenfd)
{
  perror("Failed to socket");
  return -1;
} memset(&ser_addr,0,sizeof(ser_addr));
ser_addr.sin_family = AF_INET;
ser_addr.sin_port = htons(5050); //这里输入服务器端口号
ser_addr.sin_addr.s_addr = htonl(INADDR_ANY); //INADDR_ANY表示本机IP if(-1 == bind(lisenfd,(struct sockaddr *)&ser_addr,sizeof(ser_addr)))
{
  perror("Failed to bind");
  return -1;
} printf("Now listen...\n"); if(-1 == listen(lisenfd,10))
{
  perror("Failed to listen");
  return -2;
} while(1)
{
  memset(&cli_addr,0,sizeof(cli_addr));
  cli_len = sizeof(cli_addr);   printf("Now accept...\n");   connfd = accept(lisenfd,(struct sockaddr *)&cli_addr,&cli_len);   if(-1 == connfd)
  {
   perror("Failed to accept");
   return -1;
  }   memset(recv_buf,0,sizeof(recv_buf));   printf("Now recv...\n");
  len = recv(connfd,recv_buf,sizeof(recv_buf),0);   if(-1 == len)
  {
   perror("Failed to recv");
   return -1;
  }
  printf("Recv from client is %s\n",recv_buf);   printf("Now send...\n");   memset(send_buf,0,sizeof(send_buf));
  sprintf(send_buf,"Hello!client tcp terminal.测试发送");
  len = send(connfd,send_buf,strlen(send_buf),0);
  if(-1 == len)
  {
   perror("Failed to send");
   return -1;
  }   printf("Send msg to client %s\n",send_buf);

  close(connfd);
} close(lisenfd); return 0; } /*文件2,tcp_cli.c客户端*/ #include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h> int main()
{
int sockfd;
unsigned short port;
in_addr_t addr_in;
struct sockaddr_in ser_addr;
int len = 0;
char send_buf[1024];
char recv_buf[1024];

sockfd = socket(AF_INET,SOCK_STREAM,0);
if(-1 == sockfd)
{
  perror("Failed to sockfd");
  return -1;
}

memset(&ser_addr,0,sizeof(ser_addr));
ser_addr.sin_family = AF_INET;
ser_addr.sin_port = htons(5050);
ser_addr.sin_addr.s_addr = inet_addr("192.168.1.20"); if(-1 == connect(sockfd,(struct sockaddr *)&ser_addr,sizeof(ser_addr)))
{
  perror("Failed to connect");
  return -1;
} memset(send_buf,0,sizeof(send_buf));
sprintf(send_buf,"Hello!Server terminal 发送测试");
len = send(sockfd,send_buf,strlen(send_buf),0); if(-1 ==len)
{
  perror("Failed to send");
  return -1;
} memset(recv_buf,0,sizeof(recv_buf)); printf("Now recv...\n"); len = recv(sockfd,recv_buf,sizeof(recv_buf),0);
if(-1 == len)
{
  perror("Failed to recv");
  return -1;
} printf("Receive message:%s\n",recv_buf); close(sockfd); return 0;
}