windows socket 编程实例--TCP(2007-07-28 14:33)

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简单地实现了一下监听,连接,信息收发.

一直都没解决的就是一个奇怪的连接问题......两次都是只要碰到会用上new或delete(直接或间接的)的地方全都出现连接错误......暂时先不管了......

真正做起项目来就没这么容易了, 暂时也只是熟悉了一下API的使用.

win sock 编程到此为止~next...

客户端向服务器发信息, 收到后打印一下,再回发. 客户端收到信息后打印.

---------------这是服务器的------------------

#include "afxmt.h" 
#include "winsock2.h" 
#pragma     comment(lib,"WS2_32.LIB") 
int bufi;
class mserver{
private:
      SOCKET ssock,csock;
      sockaddr_in saddr,caddr;
      int len;
      char buf[4096];
public:
      mserver(){
      }
      mserver(int port,int maxclient){
          saddr.sin_family=AF_INET;
          saddr.sin_port=htons(port); 
          saddr.sin_addr.s_addr=INADDR_ANY;
          ssock=socket(AF_INET,SOCK_STREAM,0);
          if(ssock==INVALID_SOCKET){
              printf("build socket error/n");
          }
          if(bind(ssock,(struct sockaddr*)&saddr,sizeof(saddr))==SOCKET_ERROR){
              printf("socket bind fail/n");
          }
          len=sizeof(caddr);
      }
      void close(){
          closesocket(ssock);
          closesocket(csock);
      }
      void beginlisten(){
          if(listen(ssock,10)==SOCKET_ERROR){
              printf("listen fail/n");
          }
      }
      void maccept(){
          sockaddr a;
          csock=accept(ssock,(struct sockaddr*)&caddr,&len);
          if(csock==INVALID_SOCKET){
              printf("accept fail : %d/n",WSAGetLastError());
            
          }
          printf("client from %s connected/n",inet_ntoa(caddr.sin_addr));
      }
      int receive(){
          memset(buf,0,4096);
          if(recv(csock,buf,4096,0)==SOCKET_ERROR){
              return 0;
          }
          printf("message received : %s/n",buf);
          send(csock,buf,4096,0);
          return 1;
      }
    
};
int main()
{
      WSADATA wsaData;
      if (WSAStartup(MAKEWORD(2,1),&wsaData)){
           printf("Winsock initializing fail/n");
           WSACleanup();
           return 0;
      }
      mserver s(12345,10);
      s.beginlisten();
      s.maccept();
      while(s.receive());
      s.close();
      WSACleanup();
      return 0;
}

----------------这是客户端的-------------------

#include "stdio.h" 
#include "afxmt.h" 
#include "winsock2.h" 
#pragma     comment(lib,"WS2_32.LIB") 
class mclient{
private:
      SOCKET sock;
      sockaddr_in saddr;
      int len;
      char buf[4096];
public:
      mclient(){
          sock=socket(AF_INET,SOCK_STREAM,0);
          len=sizeof(saddr);
      }
      bool mconnect(char* addr,int port){
          saddr.sin_family=AF_INET;
          saddr.sin_port=htons(port); 
          saddr.sin_addr.s_addr=inet_addr(addr);
          if(connect(sock,(struct sockaddr*)&saddr,len)==SOCKET_ERROR){
              printf("connect fail : %d",WSAGetLastError());
              return false;
          }
          return true;
      }
      void close(){
          closesocket(sock);
      }
      void msend(char* mes){
          send(sock,mes,strlen(mes),0);
      }
      bool receive(){
          memset(buf,0,4096);
          if(recv(sock,buf,4096,0)==SOCKET_ERROR){
              return false;
          }
          else{
              printf("received from server : %s/n",buf);
              return true;
          }
      }
};
int main()
{
      WSADATA wsaData;
      if (WSAStartup(MAKEWORD(2,1),&wsaData)){
           printf("Winsock initializing fail/n");
           WSACleanup();
           return 0;
      }
      mclient a;
      if(!a.mconnect("172.18.48.7",12345)){
          return 0;
      }
      char buf[1024];
      while(scanf("%s",buf)){
          if(strcmp(buf,"quit")==0){
              break;
          }
          a.msend(buf);
          a.receive();
      }
      a.close();
      WSACleanup();
      return 0;
}