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Merge pull request #23 from neilalexander/bsd

Add support for running OpenBSD
This commit is contained in:
Arceliar 2018-03-03 11:01:24 -06:00 committed by GitHub
commit 99d0740eaa
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GPG Key ID: 4AEE18F83AFDEB23
11 changed files with 225 additions and 21 deletions

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@ -7,7 +7,7 @@ import (
"os/exec"
"time"
"github.com/songgao/water"
"github.com/neilalexander/water"
)
const mtu = 65535

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@ -6,7 +6,7 @@ import (
"net"
"os/exec"
"github.com/songgao/water"
"github.com/neilalexander/water"
)
const mtu = 65535

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@ -6,7 +6,7 @@ import (
"net"
"os/exec"
"github.com/songgao/water"
"github.com/neilalexander/water"
)
const mtu = 65535

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@ -159,6 +159,20 @@ func (c *Core) DEBUG_getDHTSize() int {
return total
}
// TUN defaults
func (c *Core) DEBUG_GetTUNDefaultIfName() string {
return getDefaults().defaultIfName
}
func (c *Core) DEBUG_GetTUNDefaultIfMTU() int {
return getDefaults().defaultIfMTU
}
func (c *Core) DEBUG_GetTUNDefaultIfTAPMode() bool {
return getDefaults().defaultIfTAPMode
}
// udpInterface
// FIXME udpInterface isn't exported
// So debug functions need to work differently...

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@ -2,6 +2,7 @@ package yggdrasil
// This manages the tun driver to send/recv packets to/from applications
import "os"
import ethernet "github.com/songgao/packets/ethernet"
const IPv6_HEADER_LENGTH = 40
@ -14,6 +15,7 @@ type tunInterface interface {
Read(to []byte) (int, error)
Write(from []byte) (int, error)
Close() error
FD() *os.File
}
type tunDevice struct {
@ -25,6 +27,20 @@ type tunDevice struct {
iface tunInterface
}
type tunDefaultParameters struct {
maximumIfMTU int
defaultIfMTU int
defaultIfName string
defaultIfTAPMode bool
}
func getSupportedMTU(mtu int) int {
if mtu > getDefaults().maximumIfMTU {
return getDefaults().maximumIfMTU
}
return mtu
}
func (tun *tunDevice) init(core *Core) {
tun.core = core
tun.icmpv6.init(tun)

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@ -8,7 +8,16 @@ import "strconv"
import "encoding/binary"
import "golang.org/x/sys/unix"
import water "github.com/songgao/water"
import water "github.com/neilalexander/water"
func getDefaults() tunDefaultParameters {
return tunDefaultParameters{
maximumIfMTU: 65535,
defaultIfMTU: 65535,
defaultIfName: "auto",
defaultIfTAPMode: false,
}
}
func (tun *tunDevice) setup(ifname string, iftapmode bool, addr string, mtu int) error {
if iftapmode {
@ -20,7 +29,7 @@ func (tun *tunDevice) setup(ifname string, iftapmode bool, addr string, mtu int)
panic(err)
}
tun.iface = iface
tun.mtu = mtu
tun.mtu = getSupportedMTU(mtu)
return tun.setupAddress(addr)
}

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@ -7,7 +7,16 @@ import "fmt"
import "os/exec"
import "strings"
import water "github.com/songgao/water"
import water "github.com/neilalexander/water"
func getDefaults() tunDefaultParameters {
return tunDefaultParameters{
maximumIfMTU: 65535,
defaultIfMTU: 65535,
defaultIfName: "auto",
defaultIfTAPMode: false,
}
}
func (tun *tunDevice) setup(ifname string, iftapmode bool, addr string, mtu int) error {
var config water.Config
@ -24,7 +33,7 @@ func (tun *tunDevice) setup(ifname string, iftapmode bool, addr string, mtu int)
panic(err)
}
tun.iface = iface
tun.mtu = mtu //1280 // Lets default to the smallest thing allowed for now
tun.mtu = getSupportedMTU(mtu)
return tun.setupAddress(addr)
}

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@ -0,0 +1,144 @@
// +build openbsd
package yggdrasil
import "os/exec"
import "unsafe"
import "syscall"
import "golang.org/x/sys/unix"
import water "github.com/neilalexander/water"
// This is to catch OpenBSD
// TODO: Fix TUN mode for OpenBSD. It turns out that OpenBSD doesn't have a way
// to disable the PI header when in TUN mode, so we need to modify the read/
// writes to handle those first four bytes
func getDefaults() tunDefaultParameters {
return tunDefaultParameters{
maximumIfMTU: 16384,
defaultIfMTU: 16384,
defaultIfName: "/dev/tap0",
defaultIfTAPMode: true,
}
}
// Warning! When porting this to other BSDs, the tuninfo struct can appear with
// the fields in a different order, and the consts below might also have
// different values
type tuninfo struct {
tun_mtu uint16
tun_type uint32
tun_flags uint32
tun_dummy uint16
}
const TUNSIFINFO = (0x80000000) | ((12 & 0x1fff) << 16) | uint32(byte('t'))<<8 | 91
const TUNGIFINFO = (0x40000000) | ((12 & 0x1fff) << 16) | uint32(byte('t'))<<8 | 92
const SIOCAIFADDR_IN6 = (0x80000000) | ((4 & 0x1fff) << 16) | uint32(byte('i'))<<8 | 27
// Below this point seems to be fairly standard at least...
type in6_addrlifetime struct {
ia6t_expire float64
ia6t_preferred float64
ia6t_vltime uint32
ia6t_pltime uint32
}
type sockaddr_in6 struct {
sin6_len uint8
sin6_family uint8
sin6_port uint8
sin6_flowinfo uint32
sin6_addr [8]uint16
sin6_scope_id uint32
}
type in6_aliasreq struct {
ifra_name [16]byte
ifra_addr sockaddr_in6
ifra_dstaddr sockaddr_in6
ifra_prefixmask sockaddr_in6
ifra_flags uint32
ifra_lifetime in6_addrlifetime
}
func (tun *tunDevice) setup(ifname string, iftapmode bool, addr string, mtu int) error {
var config water.Config
if ifname[:4] == "auto" {
ifname = "/dev/tap0"
}
if len(ifname) < 9 {
panic("TUN/TAP name must be in format /dev/tunX or /dev/tapX")
}
switch {
case iftapmode || ifname[:8] == "/dev/tap":
config = water.Config{DeviceType: water.TAP}
case !iftapmode || ifname[:8] == "/dev/tun":
// config = water.Config{DeviceType: water.TUN}
panic("TUN mode is not currently supported on OpenBSD, please use TAP instead")
default:
panic("TUN/TAP name must be in format /dev/tunX or /dev/tapX")
}
config.Name = ifname
iface, err := water.New(config)
if err != nil {
panic(err)
}
tun.iface = iface
tun.mtu = getSupportedMTU(mtu)
return tun.setupAddress(addr)
}
func (tun *tunDevice) setupAddress(addr string) error {
fd := tun.iface.FD().Fd()
var err error
var ti tuninfo
tun.core.log.Printf("Interface name: %s", tun.iface.Name())
tun.core.log.Printf("Interface IPv6: %s", addr)
tun.core.log.Printf("Interface MTU: %d", tun.mtu)
// Get the existing interface flags
if _, _, errno := unix.Syscall(unix.SYS_IOCTL, uintptr(fd), uintptr(TUNGIFINFO), uintptr(unsafe.Pointer(&ti))); errno != 0 {
err = errno
tun.core.log.Printf("Error in TUNGIFINFO: %v", errno)
return err
}
//tun.core.log.Printf("TUNGIFINFO: %+v", ti)
// Set the new MTU
ti.tun_mtu = uint16(tun.mtu)
// Set the new interface flags
ti.tun_flags |= syscall.IFF_UP
switch {
case tun.iface.IsTAP():
ti.tun_flags |= syscall.IFF_MULTICAST
ti.tun_flags |= syscall.IFF_BROADCAST
case tun.iface.IsTUN():
ti.tun_flags |= syscall.IFF_POINTOPOINT
}
// Set the new interface flags
//tun.core.log.Printf("TUNSIFINFO: %+v", ti)
if _, _, errno := unix.Syscall(unix.SYS_IOCTL, uintptr(fd), uintptr(TUNSIFINFO), uintptr(unsafe.Pointer(&ti))); errno != 0 {
err = errno
tun.core.log.Printf("Error in TUNSIFINFO: %v", errno)
return err
}
// Set address
cmd := exec.Command("ifconfig", tun.iface.Name(), "inet6", addr)
//tun.core.log.Printf("ifconfig command: %v", strings.Join(cmd.Args, " "))
output, err := cmd.CombinedOutput()
if err != nil {
tun.core.log.Printf("ifconfig failed: %v.", err)
tun.core.log.Println(string(output))
}
return nil
}

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@ -1,14 +1,21 @@
// +build !linux
// +build !darwin
// +build !windows
// +build !linux,!darwin,!windows,!openbsd
package yggdrasil
import water "github.com/songgao/water"
import water "github.com/neilalexander/water"
// This is to catch unsupported platforms
// If your platform supports tun devices, you could try configuring it manually
func getDefaults() tunDefaultParameters {
return tunDefaultParameters{
maximumIfMTU: 65535,
defaultIfMTU: 65535,
defaultIfName: "none",
defaultIfTAPMode: false,
}
}
func (tun *tunDevice) setup(ifname string, iftapmode bool, addr string, mtu int) error {
var config water.Config
if iftapmode {
@ -21,7 +28,7 @@ func (tun *tunDevice) setup(ifname string, iftapmode bool, addr string, mtu int)
panic(err)
}
tun.iface = iface
tun.mtu = mtu //1280 // Lets default to the smallest thing allowed for now
tun.mtu = getSupportedMTU(mtu)
return tun.setupAddress(addr)
}

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@ -1,12 +1,21 @@
package yggdrasil
import water "github.com/songgao/water"
import water "github.com/neilalexander/water"
import "os/exec"
import "strings"
import "fmt"
// This is to catch Windows platforms
func getDefaults() tunDefaultParameters {
return tunDefaultParameters{
maximumIfMTU: 65535,
defaultIfMTU: 65535,
defaultIfName: "auto",
defaultIfTAPMode: true,
}
}
func (tun *tunDevice) 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")
@ -41,7 +50,7 @@ func (tun *tunDevice) setup(ifname string, iftapmode bool, addr string, mtu int)
panic(err)
}
tun.iface = iface
tun.mtu = mtu
tun.mtu = getSupportedMTU(mtu)
err = tun.setupMTU(tun.mtu)
if err != nil {
panic(err)

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@ -117,13 +117,9 @@ func generateConfig() *nodeConfig {
cfg.Peers = []string{}
cfg.Multicast = true
cfg.LinkLocal = ""
cfg.IfName = "auto"
cfg.IfMTU = 1280
if runtime.GOOS == "windows" {
cfg.IfTAPMode = true
} else {
cfg.IfTAPMode = false
}
cfg.IfName = core.DEBUG_GetTUNDefaultIfName()
cfg.IfMTU = core.DEBUG_GetTUNDefaultIfMTU()
cfg.IfTAPMode = core.DEBUG_GetTUNDefaultIfTAPMode()
return &cfg
}