internal_network: only poll for accept on blocking sockets

src/core/internal_network/network.cpp

@@ -693,6 +693,8 @@ std::pair<SocketBase::AcceptResult, Errno> Socket::Accept() {
     sockaddr_in addr;
     socklen_t addrlen = sizeof(addr);
 
+    const bool wait_for_accept = !is_non_blocking;
+    if (wait_for_accept) {
         std::vector<WSAPOLLFD> host_pollfds{
             WSAPOLLFD{fd, POLLIN, 0},
             WSAPOLLFD{GetInterruptSocket(), POLLIN, 0},
@@ -709,6 +711,7 @@ std::pair<SocketBase::AcceptResult, Errno> Socket::Accept() {
                 break;
             }
         }
+    }
 
     const SOCKET new_socket = accept(fd, reinterpret_cast<sockaddr*>(&addr), &addrlen);
 
@@ -913,6 +916,7 @@ Errno Socket::SetRcvTimeo(u32 value) {
 
 Errno Socket::SetNonBlock(bool enable) {
     if (EnableNonBlock(fd, enable)) {
+        is_non_blocking = enable;
         return Errno::SUCCESS;
     }
     return GetAndLogLastError();

src/core/internal_network/sockets.h

@@ -166,6 +166,9 @@ public:
     bool IsOpened() const override;
 
     void HandleProxyPacket(const ProxyPacket& packet) override;
+
+private:
+    bool is_non_blocking = false;
 };
 
 std::pair<s32, Errno> Poll(std::vector<PollFD>& poll_fds, s32 timeout);