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control/controlclient: add debug knob to force node to only IPv6 self addr

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Updates #2268

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick 2021-06-28 15:25:58 -07:00
parent 722859b476
commit fd7fddd44f
1 changed files with 20 additions and 1 deletions
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21
control/controlclient/map.go
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@ -6,8 +6,11 @@
import ( import (
"log" "log"
"os"
"sort" "sort"
"strconv"
"inet.af/netaddr"
"tailscale.com/tailcfg" "tailscale.com/tailcfg"
"tailscale.com/types/logger" "tailscale.com/types/logger"
"tailscale.com/types/netmap" "tailscale.com/types/netmap"
@ -124,7 +127,7 @@ func (ms *mapSession) netmapForResponse(resp *tailcfg.MapResponse) *netmap.Netwo
nm.SelfNode = node nm.SelfNode = node
nm.Expiry = node.KeyExpiry nm.Expiry = node.KeyExpiry
nm.Name = node.Name nm.Name = node.Name
nm.Addresses = node.Addresses nm.Addresses = filterSelfAddresses(node.Addresses)
nm.User = node.User nm.User = node.User
nm.Hostinfo = node.Hostinfo nm.Hostinfo = node.Hostinfo
if node.MachineAuthorized { if node.MachineAuthorized {
@ -280,3 +283,19 @@ func cloneNodes(v1 []*tailcfg.Node) []*tailcfg.Node {
} }
return v2 return v2
} }
var debugSelfIPv6Only, _ = strconv.ParseBool(os.Getenv("TS_DEBUG_SELF_V6_ONLY"))
func filterSelfAddresses(in []netaddr.IPPrefix) (ret []netaddr.IPPrefix) {
switch {
default:
return in
case debugSelfIPv6Only:
for _, a := range in {
if a.IP().Is6() {
ret = append(ret, a)
}
}
return ret
}
}