Missing Unix socket features.

Also known as Unix domain sockets.

This is required by some software. The related issues are as follows:

• #1427

Current Status / Supported Features

We currently support the following Unix socket features:

• socket, bind, accept, connect, and socketpair
• write, read, close and (fpath)
• getsockopt and setsockopt with support for SO_PASSCRED
• sendmsg and recvmsg with support for SCM_RIGHTS and SCM_CREDENTIALS
• MSG_TRUNC and MSG_CTRUNC flags
• All of the above for both SOCK_STREAM and SOCK_DGRAM

Missing Features / To-Do

However, some features are still missing.

These include:

• Functions
  • sendto and recvfrom (using sendmsg/recvmsg)
• Flags
  • MSG_PEEK
  • MSG_DONTWAIT (Wayland)
  • MSG_CMSG_CLOEXEC (Wayland(Optional?), D-Bus)
  • MSG_WAITALL
  • MSG_NOSIGNAL (Wayland, D-Bus)
• Options
  • SO_PEERCRED (Wayland, D-Bus)
  • SO_PEEK_OFF
  • (SO_PASSSEC)
  • (SO_PEERSEC) (D-Bus)
  • SO_ACCEPTCONN
  • SO_DOMAIN
  • SO_ERROR
  • SO_PROTOCOL
  • SO_SNDBUF (Wayland(Optional))
  • SO_TYPE
  • SO_TIMESTAMP
  • SO_TIMESTAMPNS
• Ancillary Data
  • SCM_TIMESTAMP
  • SCM_TIMESTAMPNS
  • (SCM_SECURITY)

Notes

• The changes for sendto and recvfrom are expected to be on the relibc side only. Most other features above will likely require changes on both the relibc and scheme sides.
• () means the feature needs SELinux support.
• Feature-name ([software-name]) indicates features known to be required by specific software.

References

• socket(7) - Linux manual page
• unix(7) - Linux manual page