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Don't process ICMPv6 messages when in TUN mode

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This commit is contained in:
Neil Alexander 2018-12-26 22:45:21 +00:00
parent cc2b6f093c
commit 4e03bdb054
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GPG Key ID: A02A2019A2BB0944
2 changed files with 12 additions and 5 deletions
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6
src/yggdrasil/icmpv6.go
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@ -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