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BBA/BuiltIn: Move functions to anonymous namespace
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Sepalani
parent
b950d038b9
commit
be2ede6109
@ -12,12 +12,123 @@
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namespace ExpansionInterface
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{
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namespace
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{
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u64 GetTickCountStd()
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{
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using namespace std::chrono;
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return duration_cast<milliseconds>(steady_clock::now().time_since_epoch()).count();
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}
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std::vector<u8> BuildFINFrame(StackRef* ref)
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{
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const Common::TCPPacket result(ref->bba_mac, ref->my_mac, ref->from, ref->to, ref->seq_num,
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ref->ack_num, TCP_FLAG_FIN | TCP_FLAG_ACK | TCP_FLAG_RST);
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for (auto& tcp_buf : ref->tcp_buffers)
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tcp_buf.used = false;
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return result.Build();
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}
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std::vector<u8> BuildAckFrame(StackRef* ref)
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{
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const Common::TCPPacket result(ref->bba_mac, ref->my_mac, ref->from, ref->to, ref->seq_num,
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ref->ack_num, TCP_FLAG_ACK);
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return result.Build();
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}
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// Change the IP identification and recompute the checksum
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void SetIPIdentification(u8* ptr, std::size_t size, u16 value)
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{
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if (size < Common::EthernetHeader::SIZE + Common::IPv4Header::SIZE)
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return;
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u8* const ip_ptr = ptr + Common::EthernetHeader::SIZE;
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const u8 ip_header_size = (*ip_ptr & 0xf) * 4;
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if (size < Common::EthernetHeader::SIZE + ip_header_size)
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return;
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u8* const ip_id_ptr = ip_ptr + offsetof(Common::IPv4Header, identification);
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Common::BitCastPtr<u16>(ip_id_ptr) = htons(value);
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u8* const ip_checksum_ptr = ip_ptr + offsetof(Common::IPv4Header, header_checksum);
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auto checksum_bitcast_ptr = Common::BitCastPtr<u16>(ip_checksum_ptr);
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checksum_bitcast_ptr = u16(0);
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checksum_bitcast_ptr = htons(Common::ComputeNetworkChecksum(ip_ptr, ip_header_size));
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}
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std::optional<std::vector<u8>> TryGetDataFromSocket(StackRef* ref)
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{
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size_t datasize = 0; // Set by socket.receive using a non-const reference
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unsigned short remote_port;
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switch (ref->type)
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{
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case IPPROTO_UDP:
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{
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std::array<u8, MAX_UDP_LENGTH> buffer;
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ref->udp_socket.receive(buffer.data(), MAX_UDP_LENGTH, datasize, ref->target, remote_port);
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if (datasize > 0)
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{
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ref->from.sin_port = htons(remote_port);
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ref->from.sin_addr.s_addr = htonl(ref->target.toInteger());
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const std::vector<u8> udp_data(buffer.begin(), buffer.begin() + datasize);
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const Common::UDPPacket packet(ref->bba_mac, ref->my_mac, ref->from, ref->to, udp_data);
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return packet.Build();
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}
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break;
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}
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case IPPROTO_TCP:
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sf::Socket::Status st = sf::Socket::Status::Done;
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TcpBuffer* tcp_buffer = nullptr;
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for (auto& tcp_buf : ref->tcp_buffers)
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{
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if (tcp_buf.used)
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continue;
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tcp_buffer = &tcp_buf;
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break;
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}
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// set default size to 0 to avoid issue
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datasize = 0;
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const bool can_go = (GetTickCountStd() - ref->poke_time > 100 || ref->window_size > 2000);
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std::array<u8, MAX_TCP_LENGTH> buffer;
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if (tcp_buffer != nullptr && ref->ready && can_go)
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st = ref->tcp_socket.receive(buffer.data(), MAX_TCP_LENGTH, datasize);
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if (datasize > 0)
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{
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Common::TCPPacket packet(ref->bba_mac, ref->my_mac, ref->from, ref->to, ref->seq_num,
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ref->ack_num, TCP_FLAG_ACK);
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packet.data = std::vector<u8>(buffer.begin(), buffer.begin() + datasize);
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// build buffer
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tcp_buffer->seq_id = ref->seq_num;
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tcp_buffer->tick = GetTickCountStd();
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tcp_buffer->data = packet.Build();
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tcp_buffer->seq_id = ref->seq_num;
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tcp_buffer->used = true;
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ref->seq_num += static_cast<u32>(datasize);
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ref->poke_time = GetTickCountStd();
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return tcp_buffer->data;
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}
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if (GetTickCountStd() - ref->delay > 3000)
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{
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if (st == sf::Socket::Disconnected || st == sf::Socket::Error)
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{
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ref->ip = 0;
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ref->tcp_socket.disconnect();
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return BuildFINFrame(ref);
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}
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}
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break;
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}
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return std::nullopt;
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}
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} // namespace
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bool CEXIETHERNET::BuiltInBBAInterface::Activate()
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{
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if (IsActivated())
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@ -177,23 +288,6 @@ StackRef* CEXIETHERNET::BuiltInBBAInterface::GetTCPSlot(u16 src_port, u16 dst_po
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return nullptr;
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}
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std::vector<u8> BuildFINFrame(StackRef* ref)
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{
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const Common::TCPPacket result(ref->bba_mac, ref->my_mac, ref->from, ref->to, ref->seq_num,
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ref->ack_num, TCP_FLAG_FIN | TCP_FLAG_ACK | TCP_FLAG_RST);
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for (auto& tcp_buf : ref->tcp_buffers)
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tcp_buf.used = false;
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return result.Build();
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}
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std::vector<u8> BuildAckFrame(StackRef* ref)
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{
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const Common::TCPPacket result(ref->bba_mac, ref->my_mac, ref->from, ref->to, ref->seq_num,
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ref->ack_num, TCP_FLAG_ACK);
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return result.Build();
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}
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void CEXIETHERNET::BuiltInBBAInterface::HandleTCPFrame(const Common::TCPPacket& packet)
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{
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const auto& [hwdata, ip_header, tcp_header, ip_options, tcp_options, data] = packet;
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@ -482,97 +576,6 @@ bool CEXIETHERNET::BuiltInBBAInterface::SendFrame(const u8* frame, u32 size)
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return true;
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}
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std::optional<std::vector<u8>> TryGetDataFromSocket(StackRef* ref)
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{
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size_t datasize = 0; // Set by socket.receive using a non-const reference
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unsigned short remote_port;
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switch (ref->type)
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{
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case IPPROTO_UDP:
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{
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std::array<u8, MAX_UDP_LENGTH> buffer;
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ref->udp_socket.receive(buffer.data(), MAX_UDP_LENGTH, datasize, ref->target, remote_port);
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if (datasize > 0)
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{
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ref->from.sin_port = htons(remote_port);
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ref->from.sin_addr.s_addr = htonl(ref->target.toInteger());
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const std::vector<u8> udp_data(buffer.begin(), buffer.begin() + datasize);
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const Common::UDPPacket packet(ref->bba_mac, ref->my_mac, ref->from, ref->to, udp_data);
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return packet.Build();
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}
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break;
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}
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case IPPROTO_TCP:
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sf::Socket::Status st = sf::Socket::Status::Done;
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TcpBuffer* tcp_buffer = nullptr;
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for (auto& tcp_buf : ref->tcp_buffers)
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{
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if (tcp_buf.used)
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continue;
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tcp_buffer = &tcp_buf;
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break;
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}
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// set default size to 0 to avoid issue
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datasize = 0;
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const bool can_go = (GetTickCountStd() - ref->poke_time > 100 || ref->window_size > 2000);
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std::array<u8, MAX_TCP_LENGTH> buffer;
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if (tcp_buffer != nullptr && ref->ready && can_go)
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st = ref->tcp_socket.receive(buffer.data(), MAX_TCP_LENGTH, datasize);
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if (datasize > 0)
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{
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Common::TCPPacket packet(ref->bba_mac, ref->my_mac, ref->from, ref->to, ref->seq_num,
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ref->ack_num, TCP_FLAG_ACK);
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packet.data = std::vector<u8>(buffer.begin(), buffer.begin() + datasize);
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// build buffer
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tcp_buffer->seq_id = ref->seq_num;
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tcp_buffer->tick = GetTickCountStd();
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tcp_buffer->data = packet.Build();
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tcp_buffer->seq_id = ref->seq_num;
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tcp_buffer->used = true;
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ref->seq_num += static_cast<u32>(datasize);
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ref->poke_time = GetTickCountStd();
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return tcp_buffer->data;
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}
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if (GetTickCountStd() - ref->delay > 3000)
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{
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if (st == sf::Socket::Disconnected || st == sf::Socket::Error)
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{
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ref->ip = 0;
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ref->tcp_socket.disconnect();
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return BuildFINFrame(ref);
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}
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}
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break;
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}
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return std::nullopt;
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}
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// Change the IP identification and recompute the checksum
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static void SetIPIdentification(u8* ptr, std::size_t size, u16 value)
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{
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if (size < Common::EthernetHeader::SIZE + Common::IPv4Header::SIZE)
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return;
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u8* const ip_ptr = ptr + Common::EthernetHeader::SIZE;
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const u8 ip_header_size = (*ip_ptr & 0xf) * 4;
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if (size < Common::EthernetHeader::SIZE + ip_header_size)
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return;
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u8* const ip_id_ptr = ip_ptr + offsetof(Common::IPv4Header, identification);
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Common::BitCastPtr<u16>(ip_id_ptr) = htons(value);
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u8* const ip_checksum_ptr = ip_ptr + offsetof(Common::IPv4Header, header_checksum);
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auto checksum_bitcast_ptr = Common::BitCastPtr<u16>(ip_checksum_ptr);
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checksum_bitcast_ptr = u16(0);
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checksum_bitcast_ptr = htons(Common::ComputeNetworkChecksum(ip_ptr, ip_header_size));
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}
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void CEXIETHERNET::BuiltInBBAInterface::ReadThreadHandler(CEXIETHERNET::BuiltInBBAInterface* self)
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{
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while (!self->m_read_thread_shutdown.IsSet())
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