tcpPacketsCanCoalesce evaluates if pkt can be coalesced with the packet described by item. This function makes considerations that match the kernel's

* Should be called after an authenticated data packet is received. */

* Should be called after an authenticated data packet is sent. */

* Should be called after a handshake initiation message is sent. */

tryDialPipe attempts to dial the specified pipe until cancellation or timeout.

upLocked attempts to bring the device up and reports whether it succeeded. The caller must hold device.state.mu and is responsible for updating device

TODO: When all Binds handle IdealBatchSize, remove this dynamic function and rename the IdealBatchSize constant to BatchSize.

TODO: When all Binds handle IdealBatchSize, remove this dynamic function and rename the IdealBatchSize constant to BatchSize.

BatchSize returns the preferred/max number of packets that can be read or written in a single read/write call. BatchSize must not change over the life

Close closes a file.

CloseWrite closes the write side of a message pipe in byte mode.

CreateTUN creates a Wintun interface with the given name. Should a Wintun interface with the same name exist, it is reused.

CreateUnmonitoredTUNFromFD creates a Device from the provided file descriptor.

DisableSomeRoamingForBrokenMobileSemantics should ideally be called before peers are created, though it will try to deal with it, and race maybe, if c

Function for use in Logger for discarding logged lines.

See control_default,linux, etc for implementations of SrcIP and SrcIfidx.