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mirror of https://github.com/cwinfo/yggdrasil-go.git synced 2024-11-09 01:10:28 +00:00

Add FreeBSD support in TAP mode

This commit is contained in:
Neil Alexander 2018-03-04 16:24:50 +00:00
parent 57777b6152
commit c30792245a
9 changed files with 164 additions and 17 deletions

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

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

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

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@ -8,7 +8,7 @@ import "strconv"
import "encoding/binary"
import "golang.org/x/sys/unix"
import water "github.com/neilalexander/water"
import water "github.com/yggdrasil-network/water"
func getDefaults() tunDefaultParameters {
return tunDefaultParameters{

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@ -0,0 +1,138 @@
package yggdrasil
import "os/exec"
import "unsafe"
//import "syscall"
import "golang.org/x/sys/unix"
import water "github.com/yggdrasil-network/water"
// This is to catch FreeBSD and NetBSD
func getDefaults() tunDefaultParameters {
return tunDefaultParameters{
maximumIfMTU: 32767,
defaultIfMTU: 32767,
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
/*
FreeBSD/NetBSD, net/if_tun.h:
struct tuninfo {
int baudrate;
short mtu;
u_char type;
u_char dummy;
};
*/
type tuninfo struct {
tun_baudrate int32
tun_mtu int16
tun_type uint8
tun_dummy uint8
}
const TUNSIFINFO = (0x80000000) | ((8 & 0x1fff) << 16) | uint32(byte('t'))<<8 | 91
const TUNGIFINFO = (0x40000000) | ((8 & 0x1fff) << 16) | uint32(byte('t'))<<8 | 92
const TUNSIFHEAD = (0x80000000) | ((4 & 0x1fff) << 16) | uint32(byte('t'))<<8 | 96
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 this platform, 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
}
// Set the new MTU
ti.tun_mtu = int16(tun.mtu)
// Set the new interface flags
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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@ -7,7 +7,7 @@ import "errors"
import "fmt"
import "net"
import water "github.com/neilalexander/water"
import water "github.com/yggdrasil-network/water"
import "github.com/docker/libcontainer/netlink"

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@ -1,5 +1,3 @@
// +build openbsd
package yggdrasil
import "os/exec"
@ -7,7 +5,7 @@ import "unsafe"
import "syscall"
import "golang.org/x/sys/unix"
import water "github.com/neilalexander/water"
import water "github.com/yggdrasil-network/water"
// This is to catch OpenBSD
@ -28,11 +26,22 @@ func getDefaults() tunDefaultParameters {
// the fields in a different order, and the consts below might also have
// different values
/*
OpenBSD, net/if_tun.h:
struct tuninfo {
u_int mtu;
u_short type;
u_short flags;
u_int baudrate;
};
*/
type tuninfo struct {
tun_mtu uint16
tun_type uint32
tun_flags uint32
tun_dummy uint16
tun_mtu uint32
tun_type uint16
tun_flags uint16
tun_baudrate uint32
}
const TUNSIFINFO = (0x80000000) | ((12 & 0x1fff) << 16) | uint32(byte('t'))<<8 | 91
@ -79,7 +88,7 @@ func (tun *tunDevice) setup(ifname string, iftapmode bool, addr string, mtu int)
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")
panic("TUN mode is not currently supported on this platform, please use TAP instead")
default:
panic("TUN/TAP name must be in format /dev/tunX or /dev/tapX")
}
@ -111,7 +120,7 @@ func (tun *tunDevice) setupAddress(addr string) error {
//tun.core.log.Printf("TUNGIFINFO: %+v", ti)
// Set the new MTU
ti.tun_mtu = uint16(tun.mtu)
ti.tun_mtu = uint32(tun.mtu)
// Set the new interface flags
ti.tun_flags |= syscall.IFF_UP

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@ -1,8 +1,8 @@
// +build !linux,!darwin,!windows,!openbsd
// +build !linux,!darwin,!windows,!openbsd,!freebsd
package yggdrasil
import water "github.com/neilalexander/water"
import water "github.com/yggdrasil-network/water"
// This is to catch unsupported platforms
// If your platform supports tun devices, you could try configuring it manually

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@ -1,6 +1,6 @@
package yggdrasil
import water "github.com/neilalexander/water"
import water "github.com/yggdrasil-network/water"
import "os/exec"
import "strings"
import "fmt"