14 lines
4.1 KiB
Markdown
14 lines
4.1 KiB
Markdown
# libSceNet technical debt
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### Unknown function info
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- PPSA01530 and PPSA13356 imports declared without parameters, signatures unknown, added without an implementation because the titles fail to load without them: [sceNetShowIfconfig](../../../core/libs/prx/libSceNet/Export.cpp) (libSceNet), [sce::Json::Value::setNullAccessCallBack](../../../core/libs/prx/libSceJson2/Export.cpp) (libSceJson2), and [scePadUnknown_n3kSX62fgNo](../../../core/libs/prx/libScePad/Export.cpp) (libScePad), whose real name is unknown. [_sceUltWaitingQueueResourcePoolCreate, _sceUltSemaphoreCreate, _sceUltMutexOptParamInitialize, _sceUltMutexCreate, _sceUltQueueDataResourcePoolCreate and _sceUltQueueCreate](../../../core/libs/prx/libSceUlt/Export.cpp) (libSceUlt) forward to the exports without the underscore; that their argument lists match is inferred from the other underscore Ult exports, not measured.
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- [sceHttp2GetMemoryPoolStats, sceSslGetMemoryPoolStats, sceNetGetMemoryPoolStats](../../../core/libs/prx/libSceNet/Export.cpp) (libSceHttp2, libSceSsl, libSceNet) - the signatures `(int id, stats*)`, the layouts (pool size, peak and current use, and for Http2 and Ssl a 32-bit reserved field) and the error codes were measured on a PS5 (firmware 13.60). The pool size is the one given at init or pool creation; nothing is allocated from these pools, so the peak and current use are 0, where the console already reports use right after initialization (0x15C0 bytes for Ssl, 0x1640 for Http2 and 4 for a Net pool)
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- [sceNetShowNetstat](../../../core/libs/prx/libSceNet/Export.cpp) (libSceNet) - imported by PPSA11386 and not called during its start-up; unknown signature, declared without parameters
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### Functional
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- [sceNetSetsockopt](../../../core/libs/prx/libSceNet/Export.cpp) (libSceNet) sets `SO_RCVTIMEO` and `SO_SNDTIMEO` as the host socket's timeouts. On Windows a receive or send on a stream socket that times out fails with `ETIMEDOUT`, where FreeBSD returns `EAGAIN` or the partial count: Winsock leaves the connection in an indeterminate state after a timeout and reports no partial count ([SOL_SOCKET options](https://learn.microsoft.com/en-us/windows/win32/winsock/sol-socket-socket-options)), so FreeBSD's behaviour needs the timeout waited for without the host option. A receive on a datagram socket that times out fails with `EAGAIN`
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- [sceNetSendmsg and sceNetRecvmsg](../../../core/libs/prx/libSceNet/Export.cpp) (libSceNet) copy the scatter/gather list through one host buffer and accept only the flags `sceNetSend`/`sceNetRecv` accept. Sending control data throws; a receive never returns control data (`msg_controllen` 0), since no socket option that queues it is supported
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- [sceNetResolverAbort and sceNetResolverStartNtoaMultipleRecords](../../../core/libs/prx/libSceNet/Export.cpp) (libSceNet) follow shadPS4 ([net.cpp](https://github.com/shadps4-emu/shadPS4/blob/811bfcd7d17ed8ae975c477d9ff28abc744e1ca8/src/core/libraries/net/net.cpp), [net_resolver.cpp](https://github.com/shadps4-emu/shadPS4/blob/811bfcd7d17ed8ae975c477d9ff28abc744e1ca8/src/core/libraries/net/net_resolver.cpp)); the `(int rid, int flags)` signature of the abort also matches [SharpProspero](https://github.com/SvenGDK/SharpProspero/blob/5dfdb4b0b166e83dc9ae275001afb695f12c7174/src/SharpProspero/Interop/Net/Socket.cs). Unverified on hardware. Lookups run synchronously over the host resolver, which cannot be interrupted: an abort while a lookup runs on another thread returns at once, and that lookup fails with `EINTR` without writing its output only when the host call returns; the abort flags are then ignored, as shadPS4 does for a running lookup. With nothing running, abort flag 1 (NTOA preservation) or 2 (ATON preservation) makes the next `sceNetResolverStartNtoa*` or `sceNetResolverStartAton` call on that resolver fail with `EINTR`, reported by `sceNetResolverGetError`, after its arguments are checked. Unlike shadPS4, which ignores them, other abort flag bits throw, and `sceNetResolverStartNtoaMultipleRecords` throws for any flag, including async (1) and 0x10000 (IP address literals disabled), as `sceNetResolverStartNtoaMultipleRecordsEx` does
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