基于linux c++的使用sock实现客户端和服务的消息回复和发送的通信demo

本例程进行了sock通信C++的类的封装,简化了sock通信主函数的代码量,其中类的封装亦可用于其他项目的移植.

0功能演示

1所需要的头文件(不是所有都需要,此头文件是我经常用到的头文件)

/*
 * author:jill
 * name:_myhead.h
 * date:2019-10-02
 * function:all the head file you can use
 */
#ifndef _HEAD_H
#define _HEAD_H 1
#include <stdio.h>
#include<unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netdb.h>
#include<stdlib.h>
#include<sys/stat.h>
#include<time.h>
#include <stdarg.h>
#endif

2服务端程序

/*
*author:jill
*nameinitsever_for_class.cpp
*date:2019-10-02
*function:服务端socket的class封装.port端口号
 *
*
*/
#include"/home/jill/mylib/_myhead.h"
class CServer
{
private:
  int m_listenfd;
  int m_clientfd;
public:
  CServer();
  ~CServer();
  bool initserver(const int port);
  bool Accept();
  ssize_t Recv(void *buf,ssize_t len);
  ssize_t Send(const void *buf,ssize_t len);
};
CServer::CServer()
{
  m_listenfd=0;
  m_clientfd=0;
}
CServer::~CServer()
{
  if(m_listenfd>0)  close(m_listenfd);
  if(m_clientfd>0)  close(m_clientfd);
}
bool CServer::initserver(const int port)
{
  m_listenfd=socket(AF_INET,SOCK_STREAM,0);//监听
  struct sockaddr_in serveaddr;
  memset(&serveaddr,0,sizeof(serveaddr));
  serveaddr.sin_family=AF_INET;   //ipv4协议族
  serveaddr.sin_addr.s_addr=htonl(INADDR_ANY);
  serveaddr.sin_port=htons(port);
  if(bind (m_listenfd,(const struct sockaddr*)&serveaddr,sizeof(serveaddr))!=0){
    perror("bind");close(m_listenfd);return false;}
  if(listen(m_listenfd,5)!=0){
    perror("listen");close(m_listenfd);return false;}
return true;
}
bool CServer::Accept()
{
  int socklen;
  struct sockaddr_in clientaddr;  //客户端的地址信息
  m_clientfd=accept(m_listenfd,(struct sockaddr *)&clientaddr,
(socklen_t*)&socklen);
  if(m_clientfd<0)  return false;
  return true;
}
ssize_t CServer::Recv(void *buf,ssize_t len)
{
  memset(buf,0,len);
  return recv(m_clientfd,buf,len,0);
}
ssize_t CServer::Send(const void *buf,ssize_t len)
{
  return send(m_clientfd,buf,len,0);
}
//-------------------------------------
int main()
{
  CServer server;
  if(server.initserver(5000)==false)  return -1;
  if(server.Accept()==false)  return -1;
  char buffer[1024];
  while(true)
{
  CServer server;
  if(server.initserver(5000)==false)  return -1;
   if(server.Accept()==false)  return -1;
  char buffer[1024];
  while(true)
  {
    if(server.Recv(buffer,sizeof(buffer))<=0)  break;
    printf("收到来信:%s\n",buffer);
    if(strcmp(buffer,"bye")==0)  break;
    memset(buffer,0,sizeof(buffer));
    printf("请键入消息并回车键发送:");
    scanf("%s",buffer);
    if(server.Send(buffer,strlen(buffer))<=0)  break;
  }
return 0;
}

3客户端程序

/*
 *author:jill
 *name:connecttosever_for_class.cpp
 *date:2019-10-02
 *function:客户段socket的class封装,serveip:客服端的ip地址,port端口号
 */
#include"/home/jill/mylib/_myhead.h"
class CClient
{
private:
  int m_clientfd;
public:
  CClient();
  ~CClient();
  bool connect_to_server(const char *serveip,const int port);
  ssize_t Recv(void *buf, size_t len);
  ssize_t Send(const void *buf, size_t len);
};
CClient::CClient()
{
  m_clientfd=0;
}
CClient::~CClient()
{
  if(m_clientfd>0)  close(m_clientfd);
}
bool CClient::connect_to_server(const char *serveip,const int port)
{
  m_clientfd=socket(AF_INET,SOCK_STREAM,0);
  struct hostent* h;
  memset(h,0,sizeof(h));
  h=gethostbyname(serveip);
  if(h==0)
  {
    close(m_clientfd);
    m_clientfd=0;
    return false;
  }
  struct sockaddr_in serveaddr;
  memset(&serveaddr,0,sizeof(serveaddr));
  serveaddr.sin_family=AF_INET;   //ipv4协议族
  serveaddr.sin_port=htons(port);
  memcpy(&serveaddr.sin_addr,h->h_addr,h->h_length);
  if(connect(m_clientfd,(struct sockaddr *)&serveaddr,sizeof(s
erveaddr))!=0)
  {
    perror("connect");
    close(m_clientfd);
  return false;
  }
return true;
}
ssize_t CClient::Recv(void *buf,size_t len)
{
  memset(buf,0,len);
  return recv(m_clientfd,buf,len,0);
}
ssize_t CClient::Send(const void *buf,size_t len)
{
  return send(m_clientfd,buf,len,0);
}
//------------------------------------------------------
int main( )
{
  CClient client;
  if(client.connect_to_server("192.168.226.1",5000)==false)  return -1;
  char buffer[1024];
  while(true)
  {
    printf("请键入消息回车键发送:");
    scanf("%s",buffer);
    if(client.Send(buffer,strlen(buffer))<=0)  break;
    memset(buffer,0,sizeof(buffer));
    if(client.Recv(buffer,sizeof(buffer))<=0)  break;
    printf("收到来信:%s\n",buffer);
  }
return 0;
}