From 7338775de72ecaccb37a8c1fd0cbfd4772fba44e Mon Sep 17 00:00:00 2001
From: Juan Font <juanfontalonso@gmail.com>
Date: Sat, 6 May 2023 09:30:15 +0000
Subject: [PATCH] Give a warning when users have set an unsupported prefix
Fix minor log issue
Removed debug meessage
---
config.go | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/config.go b/config.go
index c0dd1c9..9f074de 100644
--- a/config.go
+++ b/config.go
@@ -16,6 +16,7 @@ import (
"github.com/rs/zerolog/log"
"github.com/spf13/viper"
"go4.org/netipx"
+ "tailscale.com/net/tsaddr"
"tailscale.com/tailcfg"
"tailscale.com/types/dnstype"
)
@@ -515,6 +516,29 @@ func GetHeadscaleConfig() (*Config, error) {
if err != nil {
panic(fmt.Errorf("failed to parse ip_prefixes[%d]: %w", i, err))
}
+
+ if prefix.Addr().Is4() {
+ builder := netipx.IPSetBuilder{}
+ builder.AddPrefix(tsaddr.CGNATRange())
+ ipSet, _ := builder.IPSet()
+ if !ipSet.ContainsPrefix(prefix) {
+ log.Warn().
+ Msgf("Prefix %s is not in the %s range. This is an unsupported configuration.",
+ prefixInConfig, tsaddr.CGNATRange())
+ }
+ }
+
+ if prefix.Addr().Is6() {
+ builder := netipx.IPSetBuilder{}
+ builder.AddPrefix(tsaddr.TailscaleULARange())
+ ipSet, _ := builder.IPSet()
+ if !ipSet.ContainsPrefix(prefix) {
+ log.Warn().
+ Msgf("Prefix %s is not in the %s range. This is an unsupported configuration.",
+ prefixInConfig, tsaddr.TailscaleULARange())
+ }
+ }
+
parsedPrefixes = append(parsedPrefixes, prefix)
}