void TUNInterface::read_cb(ev::io& /*w*/, int /*revents*/)
{
IPv6::Packet packet = IPv6::Packet::read(_fd);
// For now ignore foreign traffic
if(packet.destination().address[0] != 0x04)
return;
_receive_cb(std::string(reinterpret_cast<char*>(packet.destination().address)+1,
15),
std::string(1, packet.next_header())+
std::string(reinterpret_cast<char*>(packet.payload()),
packet.payload_length()));
}
void TUNInterface::read_cb(ev::io& /*w*/, int /*revents*/)
{
IPv6::Packet packet = IPv6::Packet::read(_fd);
// For now ignore foreign traffic
if(packet.destination().address[0] != 0x04)
return;
// RFC 2460 - Internet Protocol, Version 6 (IPv6)
// 4. IPv6 Extension Headers
//
// If, as a result of processing a header, a node is required to proceed
// to the next header but the Next Header value in the current header is
// unrecognized by the node, it should discard the packet and send an
// ICMP Parameter Problem message to the source of the packet, with an
// ICMP Code value of 1 ("unrecognized Next Header type encountered")
// and the ICMP Pointer field containing the offset of the unrecognized
// value within the original packet. The same action should be taken if
// a node encounters a Next Header value of zero in any header other
// than an IPv6 header.
if(packet.next_header() == 0 || // Hop-by-Hop Options
packet.next_header() == 43 || // Routing
packet.next_header() == 44 || // Fragment
packet.next_header() == 50 || // Encapsulating Security Payload (ESP)
packet.next_header() == 51 || // Authentication Header (AH)
packet.next_header() == 60 || // Destination Options
packet.next_header() == 135) { // Mobility
send(IPv6::Packet::generate_ICMPv6(packet.destination(), packet.source(),
4, 1, std::string("\x06\x00\x00\x00", 4)));
return;
}
_receive_cb(std::string(reinterpret_cast<char*>(packet.destination().address)+1,
15),
std::string(1, packet.next_header())+
std::string(reinterpret_cast<char*>(packet.payload()),
packet.payload_length()));
}
void TUNInterface::send(const IPv6::Packet &packet)
{
write(_fd, packet.data(), IPv6::Packet::header_length+packet.payload_length());
}