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

Merge pull request #289 from neilalexander/tunicmpv6

Browse Source 
Don't process ICMPv6 messages when in TUN mode
This commit is contained in:
Neil Alexander 2018-12-26 23:18:23 +00:00 committed by GitHub
commit a71c5dd887
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 12 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
src/yggdrasil/icmpv6.go
View File

@ -156,6 +156,9 @@ func (i *icmpv6) parse_packet_tun(datain []byte, datamac *[]byte) ([]byte, error
// Check for a supported message type
switch icmpv6Header.Type {
case ipv6.ICMPTypeNeighborSolicitation:
if !i.tun.iface.IsTAP() {
return nil, errors.New("Ignoring Neighbor Solicitation in TUN mode")
}
response, err := i.handle_ndp(datain[ipv6.HeaderLen:])
if err == nil {
// Create our ICMPv6 response
@ -173,6 +176,9 @@ func (i *icmpv6) parse_packet_tun(datain []byte, datamac *[]byte) ([]byte, error
return nil, err
}
case ipv6.ICMPTypeNeighborAdvertisement:
if !i.tun.iface.IsTAP() {
return nil, errors.New("Ignoring Neighbor Advertisement in TUN mode")
}
if datamac != nil {
var addr address.Address
var target address.Address

11
src/yggdrasil/tun.go
View File

@ -214,11 +214,12 @@ func (tun *tunAdapter) read() error {
continue
}
if buf[o+6] == 58 {
// Found an ICMPv6 packet
b := make([]byte, n)
copy(b, buf)
// tun.icmpv6.recv <- b
go tun.icmpv6.parse_packet(b)
if tun.iface.IsTAP() {
// Found an ICMPv6 packet
b := make([]byte, n)
copy(b, buf)
go tun.icmpv6.parse_packet(b)
}
}
packet := append(util.GetBytes(), buf[o:n]...)
tun.send <- packet