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network: UDPP2P

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This commit is contained in:
nmzik
2026-10-17 10:24:45 +02:00
parent 3ecc6b7d1b
commit 56d03f16e9
2 changed files with 70 additions and 6 deletions
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src/libs/network.cpp
+23 -6
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@@ -891,6 +891,7 @@ struct P2pEndpoint {
uint16_t virtual_port = 0;
int nonblocking = 0;
int broadcast = 0;
int use_crypto = 0;
int send_buffer = 9216;
int receive_buffer = 40 * 1024;
};
@@ -1095,6 +1096,7 @@ static int* P2pSocketOption(P2pEndpoint& endpoint, int option) {
case 0x1001: return &endpoint.send_buffer;
case 0x1002: return &endpoint.receive_buffer;
case 0x1200: return &endpoint.nonblocking;
case 0x20000: return &endpoint.use_crypto;
default: return nullptr;
}
}
@@ -2459,9 +2461,9 @@ int64_t KYTY_SYSV_ABI Recvfrom(int s, void* buf, uint64_t len, int flags, void*
return -1;
}
NativeSocket socket = INVALID_NATIVE_SOCKET;
std::shared_ptr<SocketTransport> transport;
if (!GetSocketBackend(s, &socket, nullptr, &transport)) {
NativeSocket socket = INVALID_NATIVE_SOCKET;
SocketSlot state;
if (!GetSocketBackend(s, &socket, &state)) {
return -1;
}
@@ -2469,6 +2471,21 @@ int64_t KYTY_SYSV_ABI Recvfrom(int s, void* buf, uint64_t len, int flags, void*
if (host_flags < 0) {
return -1;
}
if (state.p2p) {
if (!state.p2p->bound || (!state.p2p->nonblocking && (flags & 0x80) == 0)) {
return SetGuestSocketError(Posix::POSIX_EOPNOTSUPP);
}
char pending;
if (::recv(socket, &pending, sizeof(pending), MSG_PEEK) < 0) {
SetHostSocketError();
// Winsock reports a peeked datagram's truncation as EMSGSIZE.
if (*Posix::GetErrorAddr() != Posix::POSIX_EMSGSIZE) {
return -1;
}
}
// Pending UDPP2P packets still require framing and optional decryption.
return SetGuestSocketError(Posix::POSIX_EOPNOTSUPP);
}
const auto host_len = static_cast<SocketIoLength>(
std::min<uint64_t>(len, std::numeric_limits<SocketIoLength>::max()));
@@ -2476,12 +2493,12 @@ int64_t KYTY_SYSV_ABI Recvfrom(int s, void* buf, uint64_t len, int flags, void*
SocketLength host_addrlen = sizeof(host_addr);
int64_t result = 0;
#if defined(_WIN32)
if (transport->type == SOCK_STREAM) {
if (state.transport->type == SOCK_STREAM) {
if (addr != nullptr &&
::getpeername(socket, reinterpret_cast<sockaddr*>(&host_addr), &host_addrlen) != 0) {
return SetHostSocketError();
}
result = ReceiveStream(*transport, static_cast<char*>(buf), host_len, host_flags,
result = ReceiveStream(*state.transport, static_cast<char*>(buf), host_len, host_flags,
(flags & 0x80) != 0);
if (result < 0) {
return result;
@@ -2489,7 +2506,7 @@ int64_t KYTY_SYSV_ABI Recvfrom(int s, void* buf, uint64_t len, int flags, void*
} else
#endif
{
transport.reset();
state.transport.reset();
if (addr == nullptr) {
result = ::recv(socket, static_cast<char*>(buf), host_len, host_flags);
} else {