WinSocket 编程

/*下面是服务端的连接的初始化函数， SOCKET sockserver(const char *service,const char *transport,int qlen) SOCKET TCPserver(const char * service,int qlen) SOCKET UDPserver(const char * service,int qlen) 直接调用下面三个函数，就可以对socket 进行初始化，有了它，我们进行socket 编程非常的方面笔者还作了客户端的函数，及网络编程的例子，如有需要者，请E-mail:cangzhu@163.com */
#include "stdlib.h"
#include "winsock.h"
#include "stdio.h"
#include "iostream.h"
#include "string.h" #ifndef INADDR_NONE
#define INADDR_NONE 0xffffffff
#endif SOCKET sockserver(const char *service,const char *transport,int qlen) {
strUCt protoent *protoin;
struct sockaddr_in ipaddr;
struct servent *servin;
int type;
SOCKET sock; memset(&ipaddr,0,sizeof(ipaddr));
ipaddr.sin_family=AF_INET;
ipaddr.sin_addr.s_addr=INADDR_ANY; if(servin=getservbyname(service,transport))
  ipaddr.sin_port=ntohs((u_short)servin->s_port);
else
  if((ipaddr.sin_port=htons((u_short)atoi(service)))==0)
  {
   printf("get portnum error");
   WSACleanup();
   getchar();
   exit(1);
  } if((protoin=getprotobyname(transport))==0)
{
  printf("get protocol error");
  WSACleanup();
  getchar();
  exit(1);
} if(strcmp(transport,"udp")==0)
  type=SOCK_DGRAM;
else
  type=SOCK_STREAM; sock=socket(PF_INET,type,protoin->p_proto); if(sock==INVALID_SOCKET)
{
  printf("create socket error");
  WSACleanup();
  getchar();
  exit(1);
}

if(bind(sock,(struct sockaddr*)&ipaddr,sizeof(ipaddr))==SOCKET_ERROR)
{
  printf("sock bind error");
  WSACleanup();
  getchar();
  exit(1);
} if(type==SOCK_STREAM)
{
  if(listen(sock,qlen)==SOCKET_ERROR)
  {
   printf("sock bind error");
   WSACleanup();
   getchar();
   exit(1);
  }
} return sock;
} SOCKET TCPserver(const char * service,int qlen)
{
return sockserver(service,"tcp",qlen);
} SOCKET UDPserver(const char * service,int qlen)
{
return sockserver(service,"udp",qlen);
}