TheArchive/tailscale
1
0
Fork 0
mirror of https://github.com/tailscale/tailscale.git synced 2025-10-10 09:45:08 +00:00
Code Issues Packages Projects Releases Wiki Activity

wgengine/filter: don't filter GCP DNS.

Browse Source 
Signed-off-by: David Anderson <danderson@tailscale.com>
This commit is contained in:
David Anderson
2020-11-16 14:06:37 -08:00
parent 51c8fd1dfc
commit 3c508a58cc
2 changed files with 9 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
net/packet/ip4.go
View File

@@ -40,6 +40,13 @@ func (ip IP4) IsLinkLocalUnicast() bool {
return byte(ip>>24) == 169 && byte(ip>>16) == 254
}
// IsMostLinkLocalUnicast returns whether ip is a link-local unicast
// address other than the magical "169.254.169.254" address used by
// GCP DNS.
func (ip IP4) IsMostLinkLocalUnicast() bool {
return ip.IsLinkLocalUnicast() && ip != 0xA9FEA9FE
}
// ip4HeaderLength is the length of an IPv4 header with no IP options.
const ip4HeaderLength = 20