孙鑫深入浅出UDP实例输出问题
服务端:
#include<Winsock2.h>
#include<stdio.h>
void main()
{
WORD wVersionRequested;
WSADATA wsaData;
int err;
wVersionRequested = MAKEWORD( 1, 1 );
err = WSAStartup(wVersionRequested, &wsaData);
if ( err != 0 )
{
return;
}
if ( LOBYTE( wsaData.wVersion ) != 1 || HIBYTE( wsaData.wVersion ) != 1 )
{
WSACleanup();
return;
}
SOCKET sockSrv = socket(AF_INET, SOCK_DGRAM, 0);
SOCKADDR_IN addrSrv;
addrSrv.sin_addr.S_un.S_addr = htonl(INADDR_ANY);
addrSrv.sin_family = AF_INET;
addrSrv.sin_port = htons(6000);
int retval = bind(sockSrv, (SOCKADDR*)&addrSrv, sizeof(SOCKADDR));
SOCKADDR_IN addrClient;
int len = sizeof(SOCKADDR);
char recvBuf[100];
int flag = recvfrom(sockSrv, recvBuf, 100, 0, (SOCKADDR*)&addrClient, &len);
printf("%s\n", recvBuf);
closesocket(sockSrv);
WSACleanup();
}
客户端:
#include<Winsock2.h>
#include<stdio.h>
void main()
{
WORD wVersionRequested;
WSADATA wsaData;
int err;
wVersionRequested = MAKEWORD( 1, 1 );
err = WSAStartup( wVersionRequested, &wsaData );
if ( err != 0 )
{
return;
}
if ( LOBYTE( wsaData.wVersion ) != 1 || HIBYTE( wsaData.wVersion ) != 1 )
{
WSACleanup();
return;
}
SOCKET sockClient = socket(AF_INET, SOCK_DGRAM, 0);
SOCKADDR_IN addrSrv;
addrSrv.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
addrSrv.sin_family = AF_INET;
addrSrv.sin_port = htons(6000);
sendto(sockClient, "Hello", strlen("Hello")+1, 0, (SOCKADDR*)&addrSrv, sizeof(SOCKADDR));
closesocket(sockClient);
WSACleanup();
}
使用VC6.0,在同一工作区,先运行服务端,输出结果全是"烫",看了下中间过程,好像是bind没有成功,返回的-1,麻烦各位帮忙看哪个地方出错了。