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plugin/rewrite: add handling of TTL field rewrites (#2048)

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Resolves: #1981

Signed-off-by: Paul Greenberg <greenpau@outlook.com>
This commit is contained in:
Paul G
2018-08-29 10:41:03 -04:00
committed by GitHub
parent 52147cd657
commit 38051b9089
6 changed files with 453 additions and 25 deletions
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19
plugin/rewrite/rewrite.go
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@@ -50,7 +50,6 @@ func (rw Rewrite) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.Msg
state.Req.Question[0] = wr.originalQuestion
return dns.RcodeServerFailure, fmt.Errorf("invalid name after rewrite: %s", x)
}
respRule := rule.GetResponseRule()
if respRule.Active == true {
wr.ResponseRewrite = true
@@ -111,23 +110,25 @@ func newRule(args ...string) (Rule, error) {
startArg = 1
}
if ruleType == "answer" {
return nil, fmt.Errorf("response rewrites must begin with a name rule")
}
if ruleType != "edns0" && ruleType != "name" && expectNumArgs != 3 {
return nil, fmt.Errorf("%s rules must have exactly two arguments", ruleType)
}
switch ruleType {
case "answer":
return nil, fmt.Errorf("response rewrites must begin with a name rule")
case "name":
return newNameRule(mode, args[startArg:]...)
case "class":
if expectNumArgs != 3 {
return nil, fmt.Errorf("%s rules must have exactly two arguments", ruleType)
}
return newClassRule(mode, args[startArg:]...)
case "type":
if expectNumArgs != 3 {
return nil, fmt.Errorf("%s rules must have exactly two arguments", ruleType)
}
return newTypeRule(mode, args[startArg:]...)
case "edns0":
return newEdns0Rule(mode, args[startArg:]...)
case "ttl":
return newTtlRule(mode, args[startArg:]...)
default:
return nil, fmt.Errorf("invalid rule type %q", args[0])
}