Message* Message::deserialize(const char* bytes, unsigned len)
{
if (len == 0)
return nullptr;
uint8_t TYPE = *bytes;
bytes++, len--;
switch (TYPE) {
case GAME_CREATE: return GameCreateMessage::deserialize(bytes, len);
case GAME_JOIN: return GameJoinMessage::deserialize(bytes, len);
case GAME_LEAVE: return GameLeaveMessage::deserialize(bytes, len);
case ACCOUNT_REGISTER: return AccountRegisterMessage::deserialize(bytes, len);
case ACCOUNT_LOGIN: return AccountLoginMessage::deserialize(bytes, len);
case GET_GAME_LISTING: return new EmptyMessage(GET_GAME_LISTING);
case GET_GAME_STATE: return GetGameMessage::deserialize(bytes, len);
case PLAYER_DIED: return PlayerDeathMessage::deserialize(bytes, len);
case GAME_FINISHED: return GameEndMessage::deserialize(bytes, len);
case PLANE_LOCATIONS: return PlaneLocationsMessage::deserialize(bytes, len);
case ATTACK_CELL: return AttackCellMessage::deserialize(bytes, len);
case EVENT_PLAYER_JOINED_GAME: return PlayerJoinedMessage::deserialize(bytes, len);
case SERVER_RESPONSE: return ResponseMessage::deserialize(bytes, len);
default:
throw ProtocolViolationException("Message type has no associated class."
"Sent wrong type, or forgot to define a class?");
}
}
Stream::ptr tunnel(HTTP::StreamBroker::ptr streamBroker, const URI &proxy,
IPAddress::ptr targetIP, const std::string &targetDomain,
unsigned short targetPort, unsigned char version)
{
MORDOR_ASSERT(version == 4 || version == 5);
MORDOR_ASSERT(version == 5 || !targetIP ||
targetIP->family() == AF_INET);
MORDOR_ASSERT(streamBroker);
MORDOR_ASSERT(targetIP || !targetDomain.empty());
std::string buffer;
buffer.resize(std::max<size_t>(targetDomain.size() + 1u, 16u) + 9);
Stream::ptr stream = streamBroker->getStream(proxy);
if (version == 5) {
buffer[0] = version;
buffer[1] = 1;
buffer[2] = 0;
size_t written = 0;
while (written < 3)
written += stream->write(buffer.data() + written, 3 - written);
if (stream->read(&buffer[0], 1) == 0)
MORDOR_THROW_EXCEPTION(UnexpectedEofException());
if (buffer[0] != 5)
MORDOR_THROW_EXCEPTION(ProtocolViolationException());
if (stream->read(&buffer[0], 1) == 0)
MORDOR_THROW_EXCEPTION(UnexpectedEofException());
if ((unsigned char)buffer[0] == 0xff)
MORDOR_THROW_EXCEPTION(NoAcceptableAuthenticationMethodException());
if (buffer[0] != 0)
MORDOR_THROW_EXCEPTION(ProtocolViolationException());
}
buffer[0] = version;
buffer[1] = 1;
size_t size;
if (version == 4) {
if (targetIP)
*(unsigned short *)&buffer[2] = htons(targetIP->port());
else
*(unsigned short *)&buffer[2] = htons(targetPort);
if (targetIP)
*(unsigned int *)&buffer[4] = htonl((unsigned int)(((sockaddr_in *)targetIP->name())->sin_addr.s_addr));
else
*(unsigned int *)&buffer[4] = htonl(0x00000001);
buffer[8] = 0;
if (!targetIP) {
memcpy(&buffer[9], targetDomain.c_str(), targetDomain.size());
buffer[9 + targetDomain.size()] = 0;
}
size = 9 + targetDomain.size() + (targetDomain.empty() ? 0 : 1);
} else {
buffer[2] = 0;
if (targetIP) {
if (targetIP->family() == AF_INET) {
buffer[3] = 1;
*(unsigned int *)&buffer[4] = htonl((unsigned int)(((sockaddr_in *)targetIP->name())->sin_addr.s_addr));
size = 7;
} else {
buffer[3] = 4;
memcpy(&buffer[4], &((sockaddr_in6 *)targetIP->name())->sin6_addr, 16);
size = 19;
}
} else {
buffer[3] = 3;
buffer[4] = (unsigned char)targetDomain.size();
memcpy(&buffer[5], targetDomain.c_str(), targetDomain.size());
size = 5 + targetDomain.size();
}
if (targetIP)
*(unsigned short *)&buffer[size] = htons(targetIP->port());
else
*(unsigned short *)&buffer[size] = htons(targetPort);
size += 2;
}
size_t written = 0;
while (written < size)
written += stream->write(buffer.data() + written, size - written);
if (stream->read(&buffer[0], 1) == 0)
MORDOR_THROW_EXCEPTION(UnexpectedEofException());
if ((version == 4 && buffer[0] != 0) || (version == 5 && buffer[0] != 5))
MORDOR_THROW_EXCEPTION(ProtocolViolationException());
if (stream->read(&buffer[0], 1) == 0)
MORDOR_THROW_EXCEPTION(UnexpectedEofException());
if ((version == 4 && buffer[0] != 0x5a) || (version == 5 && buffer[0] != 0))
MORDOR_THROW_EXCEPTION(InvalidResponseException(buffer[0]));
if (version == 4) {
size = 0;
while (size < 6) {
written = stream->read(&buffer[0], 6 - size);
if (written == 0)
MORDOR_THROW_EXCEPTION(UnexpectedEofException());
size += written;
}
} else {
if (stream->read(&buffer[0], 1) == 0)
MORDOR_THROW_EXCEPTION(UnexpectedEofException());
if (buffer[0] != 0)
MORDOR_THROW_EXCEPTION(InvalidResponseException(buffer[0]));
if (stream->read(&buffer[0], 1) == 0)
MORDOR_THROW_EXCEPTION(UnexpectedEofException());
if (buffer[1] == 3) {
if (buffer[0] != 0)
MORDOR_THROW_EXCEPTION(ProtocolViolationException());
size = buffer[1] + 2;
} else if (buffer[1] == 1) {
size = 6;
} else if (buffer[1] == 4) {
size = 18;
} else {
MORDOR_THROW_EXCEPTION(ProtocolViolationException());
}
while (size > 0) {
written = stream->read(&buffer[0], size);
if (written == 0)
MORDOR_THROW_EXCEPTION(UnexpectedEofException());
size -= written;
}
}
return stream;
}