5
0
mirror of https://github.com/cwinfo/yggdrasil-go.git synced 2024-11-10 04:00:37 +00:00

Define generic adapter type, rename tunDevice to tunAdapter

This commit is contained in:
Neil Alexander 2018-12-14 18:21:08 +00:00
parent f28360ce4d
commit 8045cb4dc3
No known key found for this signature in database
GPG Key ID: A02A2019A2BB0944
8 changed files with 25 additions and 24 deletions

View File

@ -24,7 +24,7 @@ type macAddress [6]byte
const len_ETHER = 14
type icmpv6 struct {
tun *tunDevice
tun *tunAdapter
mylladdr net.IP
mymac macAddress
peermacs map[address]neighbor
@ -57,7 +57,7 @@ func ipv6Header_Marshal(h *ipv6.Header) ([]byte, error) {
// Initialises the ICMPv6 module by assigning our link-local IPv6 address and
// our MAC address. ICMPv6 messages will always appear to originate from these
// addresses.
func (i *icmpv6) init(t *tunDevice) {
func (i *icmpv6) init(t *tunAdapter) {
i.tun = t
i.peermacs = make(map[address]neighbor)

View File

@ -31,7 +31,9 @@ import (
)
type adapter struct {
tunDevice
core *Core
send chan<- []byte
recv <-chan []byte
}
// The router struct has channels to/from the tun/tap device and a self peer (0), which is how messages are passed between this node and the peers/switch layer.
@ -43,7 +45,8 @@ type router struct {
in <-chan []byte // packets we received from the network, link to peer's "out"
out func([]byte) // packets we're sending to the network, link to peer's "in"
toRecv chan router_recvPacket // packets to handle via recvPacket()
tun tunDevice // TUN/TAP adapter
tun tunAdapter // TUN/TAP adapter
adapters []adapter // Other adapters
recv chan<- []byte // place where the tun pulls received packets from
send <-chan []byte // place where the tun puts outgoing packets
reset chan struct{} // signal that coords changed (re-init sessions/dht)

View File

@ -17,11 +17,9 @@ const tun_IPv6_HEADER_LENGTH = 40
const tun_ETHER_HEADER_LENGTH = 14
// Represents a running TUN/TAP interface.
type tunDevice struct {
core *Core
type tunAdapter struct {
adapter
icmpv6 icmpv6
send chan<- []byte
recv <-chan []byte
mtu int
iface *water.Interface
}
@ -36,7 +34,7 @@ func getSupportedMTU(mtu int) int {
}
// Initialises the TUN/TAP adapter.
func (tun *tunDevice) init(core *Core, send chan<- []byte, recv <-chan []byte) {
func (tun *tunAdapter) init(core *Core, send chan<- []byte, recv <-chan []byte) {
tun.core = core
tun.icmpv6.init(tun)
tun.send = send
@ -45,7 +43,7 @@ func (tun *tunDevice) init(core *Core, send chan<- []byte, recv <-chan []byte) {
// Starts the setup process for the TUN/TAP adapter, and if successful, starts
// the read/write goroutines to handle packets on that interface.
func (tun *tunDevice) start(ifname string, iftapmode bool, addr string, mtu int) error {
func (tun *tunAdapter) start(ifname string, iftapmode bool, addr string, mtu int) error {
if ifname == "none" {
return nil
}
@ -77,7 +75,7 @@ func (tun *tunDevice) start(ifname string, iftapmode bool, addr string, mtu int)
// Writes a packet to the TUN/TAP adapter. If the adapter is running in TAP
// mode then additional ethernet encapsulation is added for the benefit of the
// host operating system.
func (tun *tunDevice) write() error {
func (tun *tunAdapter) write() error {
for {
data := <-tun.recv
if tun.iface == nil {
@ -166,7 +164,7 @@ func (tun *tunDevice) write() error {
// is running in TAP mode then the ethernet headers will automatically be
// processed and stripped if necessary. If an ICMPv6 packet is found, then
// the relevant helper functions in icmpv6.go are called.
func (tun *tunDevice) read() error {
func (tun *tunAdapter) read() error {
mtu := tun.mtu
if tun.iface.IsTAP() {
mtu += tun_ETHER_HEADER_LENGTH
@ -203,7 +201,7 @@ func (tun *tunDevice) read() error {
// Closes the TUN/TAP adapter. This is only usually called when the Yggdrasil
// process stops. Typically this operation will happen quickly, but on macOS
// it can block until a read operation is completed.
func (tun *tunDevice) close() error {
func (tun *tunAdapter) close() error {
if tun.iface == nil {
return nil
}

View File

@ -77,7 +77,7 @@ type in6_ifreq_lifetime struct {
// a system socket and making syscalls to the kernel. This is not refined though
// and often doesn't work (if at all), therefore if a call fails, it resorts
// to calling "ifconfig" instead.
func (tun *tunDevice) setup(ifname string, iftapmode bool, addr string, mtu int) error {
func (tun *tunAdapter) setup(ifname string, iftapmode bool, addr string, mtu int) error {
var config water.Config
if ifname[:4] == "auto" {
ifname = "/dev/tap0"
@ -103,7 +103,7 @@ func (tun *tunDevice) setup(ifname string, iftapmode bool, addr string, mtu int)
return tun.setupAddress(addr)
}
func (tun *tunDevice) setupAddress(addr string) error {
func (tun *tunAdapter) setupAddress(addr string) error {
var sfd int
var err error

View File

@ -14,7 +14,7 @@ import (
)
// Configures the "utun" adapter with the correct IPv6 address and MTU.
func (tun *tunDevice) setup(ifname string, iftapmode bool, addr string, mtu int) error {
func (tun *tunAdapter) setup(ifname string, iftapmode bool, addr string, mtu int) error {
if iftapmode {
tun.core.log.Printf("TAP mode is not supported on this platform, defaulting to TUN")
}
@ -62,7 +62,7 @@ type ifreq struct {
// Sets the IPv6 address of the utun adapter. On Darwin/macOS this is done using
// a system socket and making direct syscalls to the kernel.
func (tun *tunDevice) setupAddress(addr string) error {
func (tun *tunAdapter) setupAddress(addr string) error {
var fd int
var err error

View File

@ -13,7 +13,7 @@ import (
)
// Configures the TAP adapter with the correct IPv6 address and MTU.
func (tun *tunDevice) setup(ifname string, iftapmode bool, addr string, mtu int) error {
func (tun *tunAdapter) setup(ifname string, iftapmode bool, addr string, mtu int) error {
var config water.Config
if iftapmode {
config = water.Config{DeviceType: water.TAP}
@ -48,7 +48,7 @@ func (tun *tunDevice) setup(ifname string, iftapmode bool, addr string, mtu int)
// is used to do this, so there is not a hard requirement on "ip" or "ifconfig"
// to exist on the system, but this will fail if Netlink is not present in the
// kernel (it nearly always is).
func (tun *tunDevice) setupAddress(addr string) error {
func (tun *tunAdapter) setupAddress(addr string) error {
// Set address
var netIF *net.Interface
ifces, err := net.Interfaces()

View File

@ -9,7 +9,7 @@ import water "github.com/yggdrasil-network/water"
// Creates the TUN/TAP adapter, if supported by the Water library. Note that
// no guarantees are made at this point on an unsupported platform.
func (tun *tunDevice) setup(ifname string, iftapmode bool, addr string, mtu int) error {
func (tun *tunAdapter) setup(ifname string, iftapmode bool, addr string, mtu int) error {
var config water.Config
if iftapmode {
config = water.Config{DeviceType: water.TAP}
@ -27,7 +27,7 @@ func (tun *tunDevice) setup(ifname string, iftapmode bool, addr string, mtu int)
// We don't know how to set the IPv6 address on an unknown platform, therefore
// write about it to stdout and don't try to do anything further.
func (tun *tunDevice) setupAddress(addr string) error {
func (tun *tunAdapter) setupAddress(addr string) error {
tun.core.log.Println("Platform not supported, you must set the address of", tun.iface.Name(), "to", addr)
return nil
}

View File

@ -13,7 +13,7 @@ import (
// Configures the TAP adapter with the correct IPv6 address and MTU. On Windows
// we don't make use of a direct operating system API to do this - we instead
// delegate the hard work to "netsh".
func (tun *tunDevice) setup(ifname string, iftapmode bool, addr string, mtu int) error {
func (tun *tunAdapter) setup(ifname string, iftapmode bool, addr string, mtu int) error {
if !iftapmode {
tun.core.log.Printf("TUN mode is not supported on this platform, defaulting to TAP")
}
@ -65,7 +65,7 @@ func (tun *tunDevice) setup(ifname string, iftapmode bool, addr string, mtu int)
}
// Sets the MTU of the TAP adapter.
func (tun *tunDevice) setupMTU(mtu int) error {
func (tun *tunAdapter) setupMTU(mtu int) error {
// Set MTU
cmd := exec.Command("netsh", "interface", "ipv6", "set", "subinterface",
fmt.Sprintf("interface=%s", tun.iface.Name()),
@ -82,7 +82,7 @@ func (tun *tunDevice) setupMTU(mtu int) error {
}
// Sets the IPv6 address of the TAP adapter.
func (tun *tunDevice) setupAddress(addr string) error {
func (tun *tunAdapter) setupAddress(addr string) error {
// Set address
cmd := exec.Command("netsh", "interface", "ipv6", "add", "address",
fmt.Sprintf("interface=%s", tun.iface.Name()),