yggdrasil-network/yggdrasil-go
1
0
Fork 0
mirror of https://github.com/yggdrasil-network/yggdrasil-go.git synced 2025-04-28 22:25:07 +03:00
Code Issues Projects Releases Packages Wiki Activity Actions

Fix MTU issues with TAP adapters

Browse source
This commit is contained in:
Neil Alexander 2018-01-25 17:44:56 +00:00
parent d52fab8af6
commit e44f64bea0
2 changed files with 31 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

17
src/yggdrasil/tun.go
View file

@ -5,6 +5,7 @@ package yggdrasil
import ethernet "github.com/songgao/packets/ethernet"
const IPv6_HEADER_LENGTH = 40
const ETHER_HEADER_LENGTH = 14
type tunInterface interface {
IsTUN() bool
@ -40,13 +41,13 @@ func (tun *tunDevice) write() error {
ethernet.NotTagged, // VLAN tagging
ethernet.IPv6, // Ethertype
len(data)) // Payload length
copy(frame[14:], data[:])
copy(frame[ETHER_HEADER_LENGTH:], data[:])
if _, err := tun.iface.Write(frame); err != nil {
return err
panic(err)
}
} else {
if _, err := tun.iface.Write(data); err != nil {
return err
panic(err)
}
}
util_putBytes(data)
@ -54,15 +55,19 @@ func (tun *tunDevice) write() error {
}
func (tun *tunDevice) read() error {
buf := make([]byte, tun.mtu)
mtu := tun.mtu
if tun.iface.IsTAP() {
mtu += ETHER_HEADER_LENGTH
}
buf := make([]byte, mtu)
for {
n, err := tun.iface.Read(buf)
if err != nil {
return err
panic(err)
}
o := 0
if tun.iface.IsTAP() {
o = 14
o = ETHER_HEADER_LENGTH
b := make([]byte, n)
copy(b, buf)
tun.ndp.recv <- b