New simulator TCP link do not work with Windows Cygwin Toolchain

[bys1123]

I saw @julianoes updated the simulator_mavlink.cpp file yesterday. #10648 Thanks for your work.

And I tried in Cygwin toolchain, seems not work well.

error:

WARN  [simulator] Failed sending mavlink message: Address family not supported by protocol

[bys1123]

I guess this bug maybe is around here:

simulator_mavlink.cpp
start line 654:

	struct sockaddr_in _myaddr {};
	_myaddr.sin_family = AF_INET;
	_myaddr.sin_addr.s_addr = htonl(INADDR_ANY);
	_myaddr.sin_port = htons(port);

or 514:

ssize_t len = sendto(_fd, buf, bufLen, 0, (struct sockaddr *)&_srcaddr, sizeof(_srcaddr));

[MaEtUgR]

When I revert simulator and jMAVsim back to UDP it's even worse. I don't see the Address faily not supported error anymore but that's probably because the simulator is hanging after it connected successfully. At least when I try to use uorb top everything freezes completely.

[TSC21]

It can be related with the lockstep instead. @julianoes

[julianoes]

I think I had fixed this and maybe stashed it away. It could be that we need to use send( instead of sendto on Win. Let me check.