windows下设置socket的connect超时
// widonws: 默认设置socket TCP client connect为阻塞模式void TcpConnect(char* strIP, UINT nPort)
{
struct sockaddr_in serverAddress;
SOCKET hSocket = NULL;
hSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if( hSocket==INVALID_SOCKET)
{
return;
}
memset(&serverAddress, 0, sizeof(serverAddress));
serverAddress.sin_family = AF_INET;
serverAddress.sin_addr.s_addr = inet_addr(strIP);
serverAddress.sin_port = htons((short)nPort);
int iTimeOut = 3000;
setsockopt(hSocket,SOL_SOCKET,SO_RCVTIMEO,(char*)&iTimeOut,sizeof(iTimeOut));
setsockopt(hSocket,SOL_SOCKET,SO_SNDTIMEO,(char*)&iTimeOut,sizeof(iTimeOut));
if( SOCKET_ERROR==connect(hSocket, (sockaddr*)&serverAddress, sizeof(serverAddress)) )
{
closesocket(hSocket);
DWORD gle = WSAGetLastError();
return;
}
char buff[] = "hello";
int sl=::send(hSocket,(char*)buff, sizeof(buff), 0);
if( sl<0 )
{
closesocket(hSocket);
return ;
}
closesocket(hSocket);
}
// widonws: 设置socket TCP client connect非阻塞模式
void SockSelect(char* strIP, UINT nPort)
{
SOCKET/*int*/ sockfd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if(sockfd < 0)
{
return;
}
struct sockaddr_in serv_addr;
//以服务器地址填充结构serv_addr
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = inet_addr(strIP);
serv_addr.sin_port = htons(nPort);
int error = -1;
int len = sizeof(int);
timeval tm;
fd_set set;
unsigned long ul = 1;
ioctlsocket(sockfd, FIONBIO, &ul); //设置为非阻塞模式
bool ret = false;
if( connect(sockfd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) == -1)
{
tm.tv_sec= 3;
tm.tv_usec = 0;
FD_ZERO(&set);
FD_SET(sockfd, &set);
if( select(sockfd+1, NULL, &set, NULL, &tm) > 0)
{
getsockopt(sockfd, SOL_SOCKET, SO_ERROR, (char *)&error, /*(socklen_t *)*/&len);
if(error == 0)
ret = true;
else
ret = false;
}
else
ret = false;
}
else
ret = true;
ul = 0;
ioctlsocket(sockfd, FIONBIO, &ul); //设置为阻塞模式
if(!ret)
{
closesocket( sockfd );
fprintf(stderr , "Cannot Connect the server!/n");
return;
}
fprintf( stderr , "Connected!/n");
char buff[] = "hello";
int sl=::send(sockfd,(char*)buff, sizeof(buff), 0);
closesocket( sockfd );
}
页:
[1]