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Set monitor connections to non-blocking

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Better to just drop monitor connections when the quality is bad than to
risk blocking the shard thread.
This commit is contained in:
dongresource 2020-12-05 23:16:09 +01:00
parent 6b257887b7
commit 53d8cb67ba
3 changed files with 15 additions and 1 deletions
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2
src/CNProtocol.cpp
View File

@ -214,7 +214,7 @@ void CNSocket::step() {
}
}
static bool setSockNonblocking(SOCKET listener, SOCKET newSock) {
bool setSockNonblocking(SOCKET listener, SOCKET newSock) {
#ifdef _WIN32
unsigned long mode = 1;
if (ioctlsocket(newSock, FIONBIO, &mode) != 0) {

2
src/CNProtocol.hpp
View File

@ -117,6 +117,8 @@ inline bool validInVarPacket(size_t base, int32_t npayloads, size_t plsize, size
return true;
}
bool setSockNonblocking(SOCKET listener, SOCKET newSock);
namespace CNSocketEncryption {
// you won't believe how complicated they made it in the client :facepalm:
static constexpr const char* defaultKey = "m@rQn~W#";

12
src/Monitor.cpp
View File

@ -46,6 +46,16 @@ void Monitor::init() {
exit(1);
}
#ifdef _WIN32
unsigned long mode = 1;
if (ioctlsocket(listener, FIONBIO, &mode) != 0) {
#else
if (fcntl(listener, F_SETFL, (fcntl(listener, F_GETFL, 0) | O_NONBLOCK)) != 0) {
#endif
std::cerr << "[FATAL] OpenFusion: fcntl failed" << std::endl;
exit(EXIT_FAILURE);
}
std::cout << "Monitor listening on *:" << settings::MONITORPORT << std::endl;
REGISTER_SHARD_TIMER(tick, settings::MONITORINTERVAL);
@ -117,6 +127,8 @@ void Monitor::start(void *unused) {
if (SOCKETERROR(sock))
continue;
setSockNonblocking(listener, sock);
std::cout << "[INFO] New monitor connection from " << inet_ntoa(address.sin_addr) << std::endl;
{