fix: correct DNS record type constants (A=1, AAAA=28)

haochangjiu · claude · haochangjiu · commit 20ea3c1da48d · 2026-05-20T20:37:16.000+08:00
The DNS type constants were incorrectly defined using iota (0, 1),
but RFC 1035 defines A record as type 1 and RFC 3596 defines AAAA
record as type 28. This caused AAAA queries to bypass the NHP
knocking logic entirely.

Co-Authored-By: Claude Opus 4.5 &lt;noreply@anthropic.com&gt;
diff --git a/common/constant.go b/common/constant.go
@@ -8,8 +8,8 @@ const (
 )
 
 const (
-	Type_A = iota
-	Type_AAAA
+	Type_A    = 1  // DNS A record type (RFC 1035)
+	Type_AAAA = 28 // DNS AAAA record type (RFC 3596)
 )
 
 const (

Original file line number	Diff line number	Diff line change
`@@ -8,8 +8,8 @@ const (`
`8`	`8`	`)`
`9`	`9`
`10`	`10`	`const (`
`11`		`- Type_A = iota`
`12`		`- Type_AAAA`
	`11`	`+ Type_A = 1 // DNS A record type (RFC 1035)`
	`12`	`+ Type_AAAA = 28 // DNS AAAA record type (RFC 3596)`
`13`	`13`	`)`
`14`	`14`
`15`	`15`	`const (`