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9.68 sys/socket.h ¶

POSIX specification:
https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/sys_socket.h.html

Gnulib module: sys_socket-h

Portability problems fixed by Gnulib:

• This header file is missing on some platforms: mingw, MSVC 14.
• This header file is not self-contained on some platforms: it requires <sys/types.h> to be included first.
• This header file does not define the type struct iovec on some platforms: OpenBSD 4.4.
• This header file is lacking the SHUT_RD, SHUT_WR, SHUT_RDWR macros on some platforms, despite having the shutdown functions: emx+gcc.
• The struct sockaddr_storage type does not have a member ss_family on some platforms: AIX 7.1.
• The CMSG_SPACE and CMSG_LEN macros are not provided on some platforms: OpenVMS.
• This header file does not define the SO_REUSEPORT macro on some platforms: Minix 3.1.8, Solaris 10, Cygwin, mingw, MSVC 14.

Portability problems not fixed by Gnulib:

• This header file does not declare the msg_control and msg_controllen members of struct msghdr on some platforms. This can be detected by the absence of the CMSG_FIRSTHDR macro: gnulib replacement header, old BSD
• This header file does not define the macro SOCK_NONBLOCK on some platforms: macOS 15, AIX 7.3, Solaris 10, mingw, MSVC 14.
• This header file does not define the macros SOCK_CLOEXEC and MSG_CMSG_CLOEXEC on some platforms: macOS 15, AIX 7.3, Solaris 10, mingw, MSVC 14.
• This header file does not define the macro MSG_CMSG_CLOEXEC on some platforms: Solaris 11 OmniOS.
• Although POSIX.1-2024 standardized SOCK_CLOFORK and MSG_CMSG_CLOFORK, no known platform supports them.
• This header file does not define the macro SO_DOMAIN on some platforms: macOS 15, NetBSD 10.0, AIX 7.3, Cygwin 3.5, mingw, MSVC 14.
• This header file does not define the macro SO_PROTOCOL on some platforms: macOS 15, NetBSD 10.0, AIX 7.3, Solaris 11.4, Cygwin 3.5, mingw, MSVC 14.
• This header file does not define the macro MSG_NOSIGNAL on some platforms: Solaris 10, mingw, MSVC 14.
• This header file does not define the macro MSG_EOR on some platforms: mingw, MSVC 14.
• This header file does not define the macros MSG_CTRUNC and MSG_TRUNC on some platforms: mingw.
• This header file does not define the macro MSG_WAITALL on some platforms: MSVC 14.
• This header file does not define the type struct cmsghdr and the constant SCM_RIGHTS on some platforms: mingw, MSVC 14.
• This header file does not define the constant SOCK_CLOFORK on some platforms: glibc 2.42, musl libc, macOS, FreeBSD, NetBSD, OpenBSD, AIX, Solaris 11.3, Cygwin, mingw, MSVC, Android.
• This header file does not define the constant MSG_CMSG_CLOFORK on some platforms: glibc 2.42, musl libc, macOS, FreeBSD, NetBSD, OpenBSD, AIX, Solaris 11.4, Cygwin, mingw, MSVC, Android.