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wgengine/filter: drop multicast packets out, don't log about them

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Eventually we'll probably support multicast. For now it's just log spam.

Fixes #629
This commit is contained in:
Brad Fitzpatrick
2020-09-25 11:06:48 -07:00
parent bbb56f2303
commit 5f807c389e
3 changed files with 24 additions and 0 deletions
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4
wgengine/packet/ip.go
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@@ -39,6 +39,10 @@ func (ip IP) String() string {
return fmt.Sprintf("%d.%d.%d.%d", byte(ip>>24), byte(ip>>16), byte(ip>>8), byte(ip))
}
func (ip IP) IsMulticast() bool {
return byte(ip>>24)&0xf0 == 0xe0
}
// IPProto is either a real IP protocol (ITCP, UDP, ...) or an special value like Unknown.
// If it is a real IP protocol, its value corresponds to its IP protocol number.
type IPProto uint8