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TESTING: protocol version 2

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This commit is contained in:
DcruBro
2026-02-10 13:27:15 +01:00
parent 316498c745
commit 14298453b3
15 changed files with 110 additions and 74 deletions
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31
src/server/net/udp/udp_server.cpp
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@@ -26,16 +26,17 @@ namespace ColumnLynx::Net::UDP {
}
void UDPServer::mHandlePacket(std::size_t bytes) {
if (bytes < sizeof(UDPPacketHeader))
if (bytes < sizeof(UDPPacketHeader) + sizeof(uint32_t))
return;
const auto* hdr = reinterpret_cast<UDPPacketHeader*>(mRecvBuffer.data());
// Get plaintext session ID (assuming first 8 bytes after nonce (header))
uint64_t sessionID = 0;
std::memcpy(&sessionID, mRecvBuffer.data() + sizeof(UDPPacketHeader), sizeof(uint64_t));
// Get plaintext session ID (assuming first 4 bytes after nonce (header))
uint32_t sessionIDNet = 0;
std::memcpy(&sessionIDNet, mRecvBuffer.data() + sizeof(UDPPacketHeader), sizeof(uint32_t));
uint32_t sessionID = ntohl(sessionIDNet);
auto it = mRecvBuffer.begin() + sizeof(UDPPacketHeader) + sizeof(uint64_t);
auto it = mRecvBuffer.begin() + sizeof(UDPPacketHeader) + sizeof(uint32_t);
std::vector<uint8_t> encryptedPayload(it, mRecvBuffer.begin() + bytes);
// Get associated session state
@@ -54,7 +55,7 @@ namespace ColumnLynx::Net::UDP {
encryptedPayload.data(), encryptedPayload.size(),
session->aesKey,
hdr->nonce, "udp-data"
//std::string(reinterpret_cast<const char*>(&sessionID), sizeof(uint64_t))
//std::string(reinterpret_cast<const char*>(&sessionID), sizeof(uint32_t))
);
Utils::debug("Passed decryption");
@@ -76,7 +77,7 @@ namespace ColumnLynx::Net::UDP {
}
}
void UDPServer::sendData(const uint64_t sessionID, const std::string& data) {
void UDPServer::sendData(uint32_t sessionID, const std::string& data) {
// Find the IPv4/IPv6 endpoint for the session
std::shared_ptr<const SessionState> session = SessionRegistry::getInstance().get(sessionID);
if (!session) {
@@ -92,23 +93,29 @@ namespace ColumnLynx::Net::UDP {
// Prepare packet
UDPPacketHeader hdr{};
randombytes_buf(hdr.nonce.data(), hdr.nonce.size());
uint8_t nonce[12];
uint32_t prefix = session->noncePrefix;
uint64_t sendCount = const_cast<SessionState*>(session.get())->send_ctr.fetch_add(1, std::memory_order_relaxed);
memcpy(nonce, &prefix, sizeof(uint32_t)); // Prefix nonce
memcpy(nonce + sizeof(uint32_t), &sendCount, sizeof(uint64_t)); // Use send count as nonce suffix to ensure uniqueness
std::copy_n(nonce, 12, hdr.nonce.data());
auto encryptedPayload = Utils::LibSodiumWrapper::encryptMessage(
reinterpret_cast<const uint8_t*>(data.data()), data.size(),
session->aesKey, hdr.nonce, "udp-data"
//std::string(reinterpret_cast<const char*>(&sessionID), sizeof(uint64_t))
//std::string(reinterpret_cast<const char*>(&sessionID), sizeof(uint32_t))
);
std::vector<uint8_t> packet;
packet.reserve(sizeof(UDPPacketHeader) + sizeof(uint64_t) + encryptedPayload.size());
packet.reserve(sizeof(UDPPacketHeader) + sizeof(uint32_t) + encryptedPayload.size());
packet.insert(packet.end(),
reinterpret_cast<uint8_t*>(&hdr),
reinterpret_cast<uint8_t*>(&hdr) + sizeof(UDPPacketHeader)
);
uint32_t sessionIDNet = htonl(sessionID);
packet.insert(packet.end(),
reinterpret_cast<const uint8_t*>(&sessionID),
reinterpret_cast<const uint8_t*>(&sessionID) + sizeof(sessionID)
reinterpret_cast<const uint8_t*>(&sessionIDNet),
reinterpret_cast<const uint8_t*>(&sessionIDNet) + sizeof(sessionIDNet)
);
packet.insert(packet.end(), encryptedPayload.begin(), encryptedPayload.end());