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Andrew Hutchings
3720a9496c
Merging TranslateReturnCode into wolfSSL_LastError dropped the IP_SOCK_getsockopt(SO_ERROR) lookup emNET integrations need to retrieve the canonical IP_ERR_* for a failed recv/send, leaving a broken branch that returned the raw value and mishandled the POSIX-facade convention. Restore the historic lookup (fixing the optlen pointer-vs-int typo along the way) and add a CI test that builds wolfSSL with -DWOLFSSL_EMNET against a clean-room shim providing an emNET-faithful IP_SOCK_getsockopt (SO_ERROR-then-errno fallback, since Linux does not stash EAGAIN in SO_ERROR); recv/send fall through to glibc.