Function nix::sys::socket::sendmsg
pub fn sendmsg(fd: RawFd, iov: &[IoVec<&[u8]>], cmsgs: &[ControlMessage<'_>], flags: MsgFlags, addr: Option<&SockAddr>) -> Result<usize>Documentation
Send data in scatter-gather vectors to a socket, possibly accompanied by ancillary data. Optionally direct the message at the given address, as with sendto.
Allocates if cmsgs is nonempty.