mirror of
https://github.com/cwinfo/yggdrasil-go.git
synced 2024-11-09 16:20:26 +00:00
Merge pull request #23 from neilalexander/bsd
Add support for running OpenBSD
This commit is contained in:
commit
99d0740eaa
@ -7,7 +7,7 @@ import (
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"os/exec"
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"time"
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"github.com/songgao/water"
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"github.com/neilalexander/water"
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)
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const mtu = 65535
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@ -6,7 +6,7 @@ import (
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"net"
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"os/exec"
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"github.com/songgao/water"
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"github.com/neilalexander/water"
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)
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const mtu = 65535
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@ -6,7 +6,7 @@ import (
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"net"
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"os/exec"
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"github.com/songgao/water"
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"github.com/neilalexander/water"
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)
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const mtu = 65535
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@ -159,6 +159,20 @@ func (c *Core) DEBUG_getDHTSize() int {
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return total
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}
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// TUN defaults
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func (c *Core) DEBUG_GetTUNDefaultIfName() string {
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return getDefaults().defaultIfName
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}
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func (c *Core) DEBUG_GetTUNDefaultIfMTU() int {
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return getDefaults().defaultIfMTU
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}
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func (c *Core) DEBUG_GetTUNDefaultIfTAPMode() bool {
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return getDefaults().defaultIfTAPMode
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}
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// udpInterface
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// FIXME udpInterface isn't exported
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// So debug functions need to work differently...
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@ -2,6 +2,7 @@ package yggdrasil
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// This manages the tun driver to send/recv packets to/from applications
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import "os"
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import ethernet "github.com/songgao/packets/ethernet"
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const IPv6_HEADER_LENGTH = 40
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@ -14,6 +15,7 @@ type tunInterface interface {
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Read(to []byte) (int, error)
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Write(from []byte) (int, error)
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Close() error
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FD() *os.File
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}
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type tunDevice struct {
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@ -25,6 +27,20 @@ type tunDevice struct {
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iface tunInterface
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}
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type tunDefaultParameters struct {
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maximumIfMTU int
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defaultIfMTU int
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defaultIfName string
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defaultIfTAPMode bool
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}
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func getSupportedMTU(mtu int) int {
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if mtu > getDefaults().maximumIfMTU {
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return getDefaults().maximumIfMTU
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}
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return mtu
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}
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func (tun *tunDevice) init(core *Core) {
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tun.core = core
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tun.icmpv6.init(tun)
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@ -8,7 +8,16 @@ import "strconv"
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import "encoding/binary"
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import "golang.org/x/sys/unix"
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import water "github.com/songgao/water"
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import water "github.com/neilalexander/water"
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func getDefaults() tunDefaultParameters {
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return tunDefaultParameters{
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maximumIfMTU: 65535,
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defaultIfMTU: 65535,
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defaultIfName: "auto",
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defaultIfTAPMode: false,
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}
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}
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func (tun *tunDevice) setup(ifname string, iftapmode bool, addr string, mtu int) error {
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if iftapmode {
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@ -20,7 +29,7 @@ func (tun *tunDevice) setup(ifname string, iftapmode bool, addr string, mtu int)
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panic(err)
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}
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tun.iface = iface
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tun.mtu = mtu
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tun.mtu = getSupportedMTU(mtu)
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return tun.setupAddress(addr)
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}
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@ -7,7 +7,16 @@ import "fmt"
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import "os/exec"
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import "strings"
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import water "github.com/songgao/water"
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import water "github.com/neilalexander/water"
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func getDefaults() tunDefaultParameters {
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return tunDefaultParameters{
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maximumIfMTU: 65535,
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defaultIfMTU: 65535,
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defaultIfName: "auto",
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defaultIfTAPMode: false,
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}
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}
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func (tun *tunDevice) setup(ifname string, iftapmode bool, addr string, mtu int) error {
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var config water.Config
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@ -24,7 +33,7 @@ func (tun *tunDevice) setup(ifname string, iftapmode bool, addr string, mtu int)
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panic(err)
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}
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tun.iface = iface
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tun.mtu = mtu //1280 // Lets default to the smallest thing allowed for now
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tun.mtu = getSupportedMTU(mtu)
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return tun.setupAddress(addr)
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}
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144
src/yggdrasil/tun_openbsd.go
Normal file
144
src/yggdrasil/tun_openbsd.go
Normal file
@ -0,0 +1,144 @@
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// +build openbsd
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package yggdrasil
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import "os/exec"
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import "unsafe"
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import "syscall"
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import "golang.org/x/sys/unix"
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import water "github.com/neilalexander/water"
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// This is to catch OpenBSD
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// TODO: Fix TUN mode for OpenBSD. It turns out that OpenBSD doesn't have a way
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// to disable the PI header when in TUN mode, so we need to modify the read/
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// writes to handle those first four bytes
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func getDefaults() tunDefaultParameters {
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return tunDefaultParameters{
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maximumIfMTU: 16384,
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defaultIfMTU: 16384,
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defaultIfName: "/dev/tap0",
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defaultIfTAPMode: true,
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}
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}
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// Warning! When porting this to other BSDs, the tuninfo struct can appear with
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// the fields in a different order, and the consts below might also have
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// different values
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type tuninfo struct {
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tun_mtu uint16
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tun_type uint32
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tun_flags uint32
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tun_dummy uint16
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}
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const TUNSIFINFO = (0x80000000) | ((12 & 0x1fff) << 16) | uint32(byte('t'))<<8 | 91
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const TUNGIFINFO = (0x40000000) | ((12 & 0x1fff) << 16) | uint32(byte('t'))<<8 | 92
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const SIOCAIFADDR_IN6 = (0x80000000) | ((4 & 0x1fff) << 16) | uint32(byte('i'))<<8 | 27
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// Below this point seems to be fairly standard at least...
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type in6_addrlifetime struct {
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ia6t_expire float64
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ia6t_preferred float64
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ia6t_vltime uint32
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ia6t_pltime uint32
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}
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type sockaddr_in6 struct {
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sin6_len uint8
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sin6_family uint8
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sin6_port uint8
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sin6_flowinfo uint32
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sin6_addr [8]uint16
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sin6_scope_id uint32
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}
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type in6_aliasreq struct {
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ifra_name [16]byte
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ifra_addr sockaddr_in6
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ifra_dstaddr sockaddr_in6
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ifra_prefixmask sockaddr_in6
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ifra_flags uint32
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ifra_lifetime in6_addrlifetime
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}
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func (tun *tunDevice) setup(ifname string, iftapmode bool, addr string, mtu int) error {
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var config water.Config
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if ifname[:4] == "auto" {
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ifname = "/dev/tap0"
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}
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if len(ifname) < 9 {
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panic("TUN/TAP name must be in format /dev/tunX or /dev/tapX")
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}
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switch {
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case iftapmode || ifname[:8] == "/dev/tap":
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config = water.Config{DeviceType: water.TAP}
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case !iftapmode || ifname[:8] == "/dev/tun":
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// config = water.Config{DeviceType: water.TUN}
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panic("TUN mode is not currently supported on OpenBSD, please use TAP instead")
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default:
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panic("TUN/TAP name must be in format /dev/tunX or /dev/tapX")
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}
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config.Name = ifname
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iface, err := water.New(config)
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if err != nil {
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panic(err)
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}
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tun.iface = iface
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tun.mtu = getSupportedMTU(mtu)
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return tun.setupAddress(addr)
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}
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func (tun *tunDevice) setupAddress(addr string) error {
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fd := tun.iface.FD().Fd()
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var err error
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var ti tuninfo
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tun.core.log.Printf("Interface name: %s", tun.iface.Name())
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tun.core.log.Printf("Interface IPv6: %s", addr)
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tun.core.log.Printf("Interface MTU: %d", tun.mtu)
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// Get the existing interface flags
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if _, _, errno := unix.Syscall(unix.SYS_IOCTL, uintptr(fd), uintptr(TUNGIFINFO), uintptr(unsafe.Pointer(&ti))); errno != 0 {
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err = errno
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tun.core.log.Printf("Error in TUNGIFINFO: %v", errno)
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return err
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}
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//tun.core.log.Printf("TUNGIFINFO: %+v", ti)
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// Set the new MTU
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ti.tun_mtu = uint16(tun.mtu)
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// Set the new interface flags
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ti.tun_flags |= syscall.IFF_UP
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switch {
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case tun.iface.IsTAP():
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ti.tun_flags |= syscall.IFF_MULTICAST
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ti.tun_flags |= syscall.IFF_BROADCAST
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case tun.iface.IsTUN():
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ti.tun_flags |= syscall.IFF_POINTOPOINT
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}
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// Set the new interface flags
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//tun.core.log.Printf("TUNSIFINFO: %+v", ti)
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if _, _, errno := unix.Syscall(unix.SYS_IOCTL, uintptr(fd), uintptr(TUNSIFINFO), uintptr(unsafe.Pointer(&ti))); errno != 0 {
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err = errno
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tun.core.log.Printf("Error in TUNSIFINFO: %v", errno)
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return err
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}
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// Set address
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cmd := exec.Command("ifconfig", tun.iface.Name(), "inet6", addr)
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//tun.core.log.Printf("ifconfig command: %v", strings.Join(cmd.Args, " "))
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output, err := cmd.CombinedOutput()
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if err != nil {
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tun.core.log.Printf("ifconfig failed: %v.", err)
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tun.core.log.Println(string(output))
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}
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return nil
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}
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@ -1,14 +1,21 @@
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// +build !linux
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// +build !darwin
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// +build !windows
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// +build !linux,!darwin,!windows,!openbsd
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package yggdrasil
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import water "github.com/songgao/water"
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import water "github.com/neilalexander/water"
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// This is to catch unsupported platforms
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// If your platform supports tun devices, you could try configuring it manually
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func getDefaults() tunDefaultParameters {
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return tunDefaultParameters{
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maximumIfMTU: 65535,
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defaultIfMTU: 65535,
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defaultIfName: "none",
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defaultIfTAPMode: false,
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}
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}
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func (tun *tunDevice) setup(ifname string, iftapmode bool, addr string, mtu int) error {
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var config water.Config
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if iftapmode {
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@ -21,7 +28,7 @@ func (tun *tunDevice) setup(ifname string, iftapmode bool, addr string, mtu int)
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panic(err)
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}
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tun.iface = iface
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tun.mtu = mtu //1280 // Lets default to the smallest thing allowed for now
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tun.mtu = getSupportedMTU(mtu)
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return tun.setupAddress(addr)
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}
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@ -1,12 +1,21 @@
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package yggdrasil
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import water "github.com/songgao/water"
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import water "github.com/neilalexander/water"
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import "os/exec"
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import "strings"
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import "fmt"
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// This is to catch Windows platforms
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func getDefaults() tunDefaultParameters {
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return tunDefaultParameters{
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maximumIfMTU: 65535,
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defaultIfMTU: 65535,
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defaultIfName: "auto",
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defaultIfTAPMode: true,
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}
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}
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func (tun *tunDevice) setup(ifname string, iftapmode bool, addr string, mtu int) error {
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if !iftapmode {
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tun.core.log.Printf("TUN mode is not supported on this platform, defaulting to TAP")
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@ -41,7 +50,7 @@ func (tun *tunDevice) setup(ifname string, iftapmode bool, addr string, mtu int)
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panic(err)
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}
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tun.iface = iface
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tun.mtu = mtu
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tun.mtu = getSupportedMTU(mtu)
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err = tun.setupMTU(tun.mtu)
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if err != nil {
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panic(err)
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10
yggdrasil.go
10
yggdrasil.go
@ -117,13 +117,9 @@ func generateConfig() *nodeConfig {
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cfg.Peers = []string{}
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cfg.Multicast = true
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cfg.LinkLocal = ""
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cfg.IfName = "auto"
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cfg.IfMTU = 1280
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if runtime.GOOS == "windows" {
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cfg.IfTAPMode = true
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} else {
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cfg.IfTAPMode = false
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}
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cfg.IfName = core.DEBUG_GetTUNDefaultIfName()
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cfg.IfMTU = core.DEBUG_GetTUNDefaultIfMTU()
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cfg.IfTAPMode = core.DEBUG_GetTUNDefaultIfTAPMode()
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return &cfg
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}
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