Enum nng::options::transport::tcp::KeepAlive [−][src]
pub enum KeepAlive {}
Expand description
Enable the sending of keep-alive messages on the underlying TCP stream.
This option is false
by default. When enabled, if no messages are
seen for a period of time, then a zero length TCP message is sent
with the ACK flag set in an attempt to tickle some traffic from the
peer. If none is still seen (after some platform-specific number of
retries and timeouts), then the remote peer is presumed dead, and
the connection is closed.
This option has two purposes. First, it can be used to detect dead peers on an otherwise quiescent network. Second, it can be used to keep connection table entries in NAT and other middleware from being expiring due to lack of activity.
Support
- Dialers and Listeners can use this option with the following transports:
- TCP
- TLS
- Pipes can read this value on the following transports:
- TCP
- TLS
- Sockets can use this to set a default value.
Trait Implementations
This method returns an ordering between self
and other
values if one exists. Read more
This method tests less than (for self
and other
) and is used by the <
operator. Read more
This method tests less than or equal to (for self
and other
) and is used by the <=
operator. Read more
This method tests greater than (for self
and other
) and is used by the >
operator. Read more
Auto Trait Implementations
impl RefUnwindSafe for KeepAlive
impl UnwindSafe for KeepAlive
Blanket Implementations
Mutably borrows from an owned value. Read more