fix(libSceNet): describe sockets made with socket() in sceNetGetSockInfo - #9948

…o (upstream boykopovar#11242, boykopovar#11243, boykopovar#9948) (#25)

* fix(libSceNet): register libkernel sockets with sceNetEpollControl

Human Fall Flat (PPSA02429) opens its sockets with libkernel's socket()
and registers them with sceNetEpollControl. libSceNet only looked in its
own socket table, so every ADD and DEL failed with SCE_NET_ERROR_EBADF.
The game retries without pause: on box 2 it made more than 1.6 million
failing calls on 14 descriptors in its first seconds, all of them
libkernel sockets.

sceNetEpollControl now accepts a descriptor libkernel has open as a
socket, as sceNetSocketClose and sceNetSetsockopt already do for MXGP 26
(PPSA30839). sceNetEpollWait looks up the host socket of such a
registration through libkernel after g_mutex is released, because that
lookup asks libSceNet's own table for descriptors libkernel does not
own, and keeps the owner alive across the host poll. libkernel's close()
retires the registrations of the closed socket; a wait drops a
registration whose socket is gone.

guest_sce_net registers a libkernel UDP socket, waits for it to become
readable and then writable, deletes it twice, closes registered sockets
through close() and sceKernelClose and waits again, and checks that a
descriptor that was never open still fails with EBADF.


From boykopovar#11242

* fix(libkernel): retire epoll registrations of a socket closed with sceKernelClose


From boykopovar#11242

* fix(libSceNet): read an option of a libkernel socket through sceNetGetsockopt

Human Fall Flat (PPSA02429) opens its sockets with libkernel's socket()
and reads options of them with sceNetGetsockopt. libSceNet only looked
in its own socket table, so each call failed with SCE_NET_ERROR_EBADF.
On the console both calls work on the same kernel sockets, the position
sceNetSetsockopt already takes for MXGP 26 (PPSA30839).

A descriptor libSceNet does not own but libkernel has open as a socket
now goes to libkernel's getsockopt(), which answers the options it
models. Anything else still fails with EBADF. The fallback runs after
g_mutex is released.

guest_sce_net reads SO_SNDBUF and TCP_NODELAY of a libkernel TCP socket
through sceNetGetsockopt, checks that an unknown level fails with
EINVAL, and that the call fails with EBADF once the socket is closed.


From boykopovar#11243

* fix(libSceNet): report the receive queue length in sceNetGetSockInfo

sceNetGetSockInfo always reported 0 in recv_queue_length, so a title that
reads a socket only when its record shows queued data never reads. The
record now carries the host's FIONREAD count; a socket the host refuses
FIONREAD for keeps 0, the value a PS4 Pro on firmware 10.71 reports for
an empty queue. The datagram difference between hosts and the other
measured values of the record are recorded as technical debt.


From boykopovar#9948

* fix(libSceNet): describe sockets made with socket() in sceNetGetSockInfo

The console shares one descriptor space between the kernel socket calls
and libSceNet, and sceNetGetSockInfo on a PS4 Pro (firmware 10.71)
describes and lists a socket made with socket() as it does one made with
sceNetSocket. AnyPS5 answered EBADF for such a descriptor and left it out
of the s < 0 list. libkernel now describes one of its sockets (native
handle with its owner, family, type, non-blocking mode) and lists its
descriptors; sceNetGetSockInfo reads its own table first and the kernel's
otherwise, without adopting the socket into libSceNet.


From boykopovar#9948

* test(libSceNet): drop libkernel declarations that Api.hpp already provides

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Co-authored-by: Josip Parlov <josipparlov@protonmail.com>
Co-authored-by: ntamas94 <ntamas@live.com>