yggdrasil-network/yggdrasil-go
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More godoc improvements

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Neil Alexander 2019-03-29 18:18:31 +00:00
parent b5ac65cacb
commit f19a4e4398
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GPG key ID: A02A2019A2BB0944
4 changed files with 44 additions and 14 deletions
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35
src/tuntap/tun.go
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@ -27,7 +27,10 @@ import (
const tun_IPv6_HEADER_LENGTH = 40
const tun_ETHER_HEADER_LENGTH = 14
// Represents a running TUN/TAP interface.
// TunAdapter represents a running TUN/TAP interface and extends the
// yggdrasil.Adapter type. In order to use the TUN/TAP adapter with Yggdrasil,
// you should pass this object to the yggdrasil.SetRouterAdapter() function
// before calling yggdrasil.Start().
type TunAdapter struct {
yggdrasil.Adapter
addr address.Address
@ -50,44 +53,50 @@ func getSupportedMTU(mtu int) int {
return mtu
}
// Get the adapter name
// Name returns the name of the adapter, e.g. "tun0". On Windows, this may
// return a canonical adapter name instead.
func (tun *TunAdapter) Name() string {
return tun.iface.Name()
}
// Get the adapter MTU
// MTU gets the adapter's MTU. This can range between 1280 and 65535, although
// the maximum value is determined by your platform. The returned value will
// never exceed that of MaximumMTU().
func (tun *TunAdapter) MTU() int {
return getSupportedMTU(tun.mtu)
}
// Get the adapter mode
// IsTAP returns true if the adapter is a TAP adapter (Layer 2) or false if it
// is a TUN adapter (Layer 3).
func (tun *TunAdapter) IsTAP() bool {
return tun.iface.IsTAP()
}
// Gets the default TUN/TAP interface name for your platform.
// DefaultName gets the default TUN/TAP interface name for your platform.
func DefaultName() string {
return defaults.GetDefaults().DefaultIfName
}
// Gets the default TUN/TAP interface MTU for your platform. This can be as high
// as 65535, depending on platform, but is never lower than 1280.
// DefaultMTU gets the default TUN/TAP interface MTU for your platform. This can
// be as high as MaximumMTU(), depending on platform, but is never lower than 1280.
func DefaultMTU() int {
return defaults.GetDefaults().DefaultIfMTU
}
// Gets the default TUN/TAP interface mode for your platform.
// DefaultIsTAP returns true if the default adapter mode for the current
// platform is TAP (Layer 2) and returns false for TUN (Layer 3).
func DefaultIsTAP() bool {
return defaults.GetDefaults().DefaultIfTAPMode
}
// Gets the maximum supported TUN/TAP interface MTU for your platform. This
// can be as high as 65535, depending on platform, but is never lower than 1280.
// MaximumMTU returns the maximum supported TUN/TAP interface MTU for your
// platform. This can be as high as 65535, depending on platform, but is never
// lower than 1280.
func MaximumMTU() int {
return defaults.GetDefaults().MaximumIfMTU
}
// Initialises the TUN/TAP adapter.
// Init initialises the TUN/TAP adapter.
func (tun *TunAdapter) Init(config *config.NodeState, log *log.Logger, send chan<- []byte, recv <-chan []byte, reject <-chan yggdrasil.RejectedPacket) {
tun.config = config
tun.log = log
@ -111,8 +120,8 @@ func (tun *TunAdapter) Init(config *config.NodeState, log *log.Logger, send chan
}()
}
// Starts the setup process for the TUN/TAP adapter, and if successful, starts
// the read/write goroutines to handle packets on that interface.
// Start the setup process for the TUN/TAP adapter. If successful, starts the
// read/write goroutines to handle packets on that interface.
func (tun *TunAdapter) Start(a address.Address, s address.Subnet) error {
tun.addr = a
tun.subnet = s