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tailcfg: add DNS address list for IsWireGuardOnly nodes

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Tailscale exit nodes provide DNS service over the peer API, however
IsWireGuardOnly nodes do not have a peer API, and instead need client
DNS parameters passed in their node description.

For Mullvad nodes this will contain the in network 10.64.0.1 address.

Updates #9377

Signed-off-by: James Tucker <james@tailscale.com>
This commit is contained in:
James Tucker
2023-09-14 10:04:31 -07:00
committed by James Tucker
parent 335a5aaf9a
commit e7727db553
9 changed files with 160 additions and 2 deletions
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35
control/controlclient/map_test.go
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@@ -20,6 +20,7 @@ import (
"tailscale.com/tailcfg"
"tailscale.com/tstest"
"tailscale.com/tstime"
"tailscale.com/types/dnstype"
"tailscale.com/types/key"
"tailscale.com/types/logger"
"tailscale.com/types/netmap"
@@ -835,6 +836,40 @@ func TestPatchifyPeersChanged(t *testing.T) {
},
},
},
{
name: "change_exitnodednsresolvers",
mr0: &tailcfg.MapResponse{
Node: &tailcfg.Node{Name: "foo.bar.ts.net."},
Peers: []*tailcfg.Node{
{ID: 1, ExitNodeDNSResolvers: []*dnstype.Resolver{{Addr: "dns.exmaple.com"}}, Hostinfo: hi},
},
},
mr1: &tailcfg.MapResponse{
PeersChanged: []*tailcfg.Node{
{ID: 1, ExitNodeDNSResolvers: []*dnstype.Resolver{{Addr: "dns2.exmaple.com"}}, Hostinfo: hi},
},
},
want: &tailcfg.MapResponse{
PeersChanged: []*tailcfg.Node{
{ID: 1, ExitNodeDNSResolvers: []*dnstype.Resolver{{Addr: "dns2.exmaple.com"}}, Hostinfo: hi},
},
},
},
{
name: "same_exitnoderesolvers",
mr0: &tailcfg.MapResponse{
Node: &tailcfg.Node{Name: "foo.bar.ts.net."},
Peers: []*tailcfg.Node{
{ID: 1, ExitNodeDNSResolvers: []*dnstype.Resolver{{Addr: "dns.exmaple.com"}}, Hostinfo: hi},
},
},
mr1: &tailcfg.MapResponse{
PeersChanged: []*tailcfg.Node{
{ID: 1, ExitNodeDNSResolvers: []*dnstype.Resolver{{Addr: "dns.exmaple.com"}}, Hostinfo: hi},
},
},
want: &tailcfg.MapResponse{},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {