Enum nix::sys::socket::ControlMessage
source · #[non_exhaustive]pub enum ControlMessage<'a> {
ScmRights(&'a [RawFd]),
Ipv4PacketInfo(&'a in_pktinfo),
Ipv6PacketInfo(&'a in6_pktinfo),
Ipv6HopLimit(&'a c_int),
}
socket
and uio
only.Expand description
A type-safe zero-copy wrapper around a single control message, as used with
sendmsg
. More types may be added to this enum; do not exhaustively
pattern-match it.
Variants (Non-exhaustive)§
This enum is marked as non-exhaustive
ScmRights(&'a [RawFd])
A message of type SCM_RIGHTS
, containing an array of file
descriptors passed between processes.
See the description in the “Ancillary messages” section of the unix(7) man page.
Using multiple ScmRights
messages for a single sendmsg
call isn’t
recommended since it causes platform-dependent behaviour: It might
swallow all but the first ScmRights
message or fail with EINVAL
.
Instead, you can put all fds to be passed into a single ScmRights
message.
Ipv4PacketInfo(&'a in_pktinfo)
net
only.Configure the sending addressing and interface for v4.
For further information, please refer to the
ip(7)
man page.
Ipv6PacketInfo(&'a in6_pktinfo)
net
only.Configure the sending addressing and interface for v6.
For further information, please refer to the
ipv6(7)
man page.
Ipv6HopLimit(&'a c_int)
net
only.Configure the hop limit for v6 multicast traffic.
Set the IPv6 hop limit for this message. The argument is an integer
between 0 and 255. A value of -1 will set the hop limit to the route
default if possible on the interface. Without this cmsg, packets sent
with sendmsg have a hop limit of 1 and will not leave the local network.
For further information, please refer to the
ipv6(7)
man page.
Trait Implementations§
source§impl<'a> Clone for ControlMessage<'a>
impl<'a> Clone for ControlMessage<'a>
source§fn clone(&self) -> ControlMessage<'a>
fn clone(&self) -> ControlMessage<'a>
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl<'a> Debug for ControlMessage<'a>
impl<'a> Debug for ControlMessage<'a>
source§impl<'a> PartialEq for ControlMessage<'a>
impl<'a> PartialEq for ControlMessage<'a>
source§fn eq(&self, other: &ControlMessage<'a>) -> bool
fn eq(&self, other: &ControlMessage<'a>) -> bool
self
and other
values to be equal, and is used
by ==
.