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plugin/metadata: add metadata plugin (#1894)

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* plugin/metadata: add metadata plugin

* plugin/metadata: Add MD struct, refactor code, fix doc

* plugin/metadata: simplify metadata key

* plugin/metadata: improve setup_test

* Support of metadata by rewrite plugin. Move calculated variables to metadata.

* Move variables from metadata to pkg, add UTs, READMEs change, metadata small fixes

* Add client port validation to variables_test

* plugin/metadata: improve README

* plugin/metadata: rename methods

* plugin/metadata: Update Metadataer interface, update doc, cosmetic code changes

* plugin/metadata: move colllisions check to OnStartup(). Fix default variables metadataer.

* plugin/metadata: Fix comment for method setValue

* plugin/metadata: change variables order to fix linter warning

* plugin/metadata: rename Metadataer to Provider
This commit is contained in:
Eugen Kleiner
2018-06-29 12:44:16 +03:00
committed by Miek Gieben
parent dae506b563
commit 17d807f05f
19 changed files with 655 additions and 130 deletions
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11
plugin/rewrite/name.go
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@@ -1,6 +1,7 @@
package rewrite
import (
"context"
"fmt"
"regexp"
"strconv"
@@ -56,7 +57,7 @@ const (
// Rewrite rewrites the current request based upon exact match of the name
// in the question section of the request
func (rule *nameRule) Rewrite(w dns.ResponseWriter, r *dns.Msg) Result {
func (rule *nameRule) Rewrite(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) Result {
if rule.From == r.Question[0].Name {
r.Question[0].Name = rule.To
return RewriteDone
@@ -65,7 +66,7 @@ func (rule *nameRule) Rewrite(w dns.ResponseWriter, r *dns.Msg) Result {
}
// Rewrite rewrites the current request when the name begins with the matching string
func (rule *prefixNameRule) Rewrite(w dns.ResponseWriter, r *dns.Msg) Result {
func (rule *prefixNameRule) Rewrite(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) Result {
if strings.HasPrefix(r.Question[0].Name, rule.Prefix) {
r.Question[0].Name = rule.Replacement + strings.TrimLeft(r.Question[0].Name, rule.Prefix)
return RewriteDone
@@ -74,7 +75,7 @@ func (rule *prefixNameRule) Rewrite(w dns.ResponseWriter, r *dns.Msg) Result {
}
// Rewrite rewrites the current request when the name ends with the matching string
func (rule *suffixNameRule) Rewrite(w dns.ResponseWriter, r *dns.Msg) Result {
func (rule *suffixNameRule) Rewrite(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) Result {
if strings.HasSuffix(r.Question[0].Name, rule.Suffix) {
r.Question[0].Name = strings.TrimRight(r.Question[0].Name, rule.Suffix) + rule.Replacement
return RewriteDone
@@ -84,7 +85,7 @@ func (rule *suffixNameRule) Rewrite(w dns.ResponseWriter, r *dns.Msg) Result {
// Rewrite rewrites the current request based upon partial match of the
// name in the question section of the request
func (rule *substringNameRule) Rewrite(w dns.ResponseWriter, r *dns.Msg) Result {
func (rule *substringNameRule) Rewrite(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) Result {
if strings.Contains(r.Question[0].Name, rule.Substring) {
r.Question[0].Name = strings.Replace(r.Question[0].Name, rule.Substring, rule.Replacement, -1)
return RewriteDone
@@ -94,7 +95,7 @@ func (rule *substringNameRule) Rewrite(w dns.ResponseWriter, r *dns.Msg) Result
// Rewrite rewrites the current request when the name in the question
// section of the request matches a regular expression
func (rule *regexNameRule) Rewrite(w dns.ResponseWriter, r *dns.Msg) Result {
func (rule *regexNameRule) Rewrite(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) Result {
regexGroups := rule.Pattern.FindStringSubmatch(r.Question[0].Name)
if len(regexGroups) == 0 {
return RewriteIgnored