本文整理汇总了C++中Datagram::SetBuffer方法的典型用法代码示例。如果您正苦于以下问题：C++ Datagram::SetBuffer方法的具体用法？C++ Datagram::SetBuffer怎么用？C++ Datagram::SetBuffer使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Datagram的用法示例。
在下文中一共展示了Datagram::SetBuffer方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: sizeof
bool
RawDatagramSocket::receive(InetAddress &outAddr, Datagram &outDG)
{
// The return address information
sockaddr_in addr;
int numBytes = 0;
#ifdef WIN32
int sas = sizeof(sockaddr);
#else
socklen_t sas = sizeof(sockaddr);
#endif
// Read pending datagram
if (!m_stripHeader)
{
// if we don't have to strip it's much more efficient as we can
// simply use the datagram's buffer directly
char* buffer = 0;
outDG.GetBuffer(&buffer);
outDG.SetBuffer(0, Datagram::MaxDatagramSize);
numBytes = recvfrom(m_socket, buffer, Datagram::MaxDatagramSize,
0, (sockaddr *) &addr, &sas);
if (numBytes < 0)
{
outDG.SetBuffer(0, 0);
return false;
}
outDG.SetBuffer(0, numBytes);
}
else
{
// stripping means we must have a temp buffer and pay for it :P
char buffer[Datagram::MaxDatagramSize + sizeof(ip)];
numBytes = recvfrom (m_socket, buffer, Datagram::MaxDatagramSize + sizeof(ip),
0, (sockaddr *) &addr, &sas);
if (numBytes < 0)
{
outDG.SetBuffer(0, 0);
return false;
}
// Find the number of bytes for the header of the message (the payload is
// immediately after)
ip *ipstr = (ip*) buffer;
int hlen = ipstr->ip_hl << 2; // 32-bit "words"
// hopefully payload has zero or more bytes...
if (numBytes < hlen)
{
outDG.SetBuffer(0, 0);
return false;
}
outDG.SetBuffer(buffer + hlen, numBytes - hlen);
}
outAddr.setIPAddress(addr.sin_addr);
return true;
}