Implemented BSD socket options improvements (#374)

2026-05-28T20:23:22Z

● - initial support - bsd: address PR review feedback - Fix build failure: so_linger was stored on NX_TCP_SOCKET which has no such field. Linger state is now kept in NX_BSD_SOCKET using the new nx_bsd_option_linger field and the existing NX_BSD_SOCKET_ENABLE_OPTION_LINGER flag. - Fix sign-conversion warning in setsockopt(IP_TOS): read the value as INT, validate range 0..0xFF, then cast to ULONG. - Reject out-of-range INT values (< 0 or > 255) in setsockopt(IP_TTL). - Add lower-bound check for IPPROTO_IP options in getsockopt and setsockopt so that SO_* option numbers are no longer silently accepted at the IPPROTO_IP level. - Add null check for raw sockets in IP_TOS and IP_TTL get/set paths; return ENOPROTOOPT instead of dereferencing a NULL pointer. - Validate *option_length before writing in SO_BROADCAST, TCP_NODELAY, SO_LINGER and IP_TOS getsockopt paths; set *option_length to the actual size returned on success. - Separate ENOPROTOOPT (wrong socket type) from EINVAL (wrong length) in SO_LINGER get/set error handling. - Remove unused so_linger local variable from getsockopt. - Replace C++-style // comments in the close/linger path with C99 /* */ comments. - Add regression test netx_bsd_socket_options_test covering SO_LINGER, IP_TOS, IP_TTL, SO_BROADCAST and TCP_NODELAY round-trips and error paths; register in bsd_test_cases in regression/CMakeLists.txt. Co-authored-by: Frédéric Desbiens frederic.desbiens@eclipse-foundation.org Co-authored-by: Copilot 223556219+Copilot@users.noreply.github.com

netxduo.git/test/regression/bsd_test/netx_bsd_socket_options_test.c, branch dev

Implemented BSD socket options improvements (#374)