ip_aux.cxx

// C++
#include <type_traits>
 
// Cosmos
#include <cosmos/error/RuntimeError.hxx>
#include <cosmos/net/IPAddress.hxx>
#include <cosmos/net/ip_aux.hxx>
#include <cosmos/net/traits.hxx>
 
namespace cosmos {
 
static_assert(sizeof(IP4SocketError) == sizeof(struct sock_extended_err), "size mismatch between SocketError and struct sock_extended_err!");
 
template <SocketFamily FAMILY>
void SocketErrorMessage<FAMILY>::deserialize(const ReceiveMessageHeader::ControlMessage &msg) {
        this->checkMsg(msg, FamilyTraits<FAMILY>::CtrlMsg::RECVERR);
 
        m_data.clear();
        auto data = msg.data();
 
        // The SocketError can carry additional piggyback data not declared in
        // the struct (notably: the offender sockaddr). Thus we need to be
        // prepared to allocate more memory than sizeof(SocketError). For this
        // reason we use a vector as memory backend for the error.
 
        if (msg.dataLength() < sizeof(SocketError)) {
                cosmos_throw (RuntimeError("IP_RECVERR ancillary message too small"));
        }
 
        m_data.resize(msg.dataLength());
 
        std::memcpy(m_data.data(), data, msg.dataLength());
}
 
template class SocketErrorMessage<SocketFamily::INET>;
template class SocketErrorMessage<SocketFamily::INET6>;
 
} // end ns