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Implement a DNS zone

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Full implementation, DNS (and in the future DNSSEC). Returns answer in a
hopefully standards compliant way.
Testing with my miek.nl zone are included as well.
This should correctly handle nodata, nxdomain and cnames.
This commit is contained in:
Miek Gieben
2016-03-27 07:37:23 +01:00
parent 9eeb2b0259
commit 5387c162c9
10 changed files with 983 additions and 86 deletions
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34
core/setup/file.go
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@@ -1,13 +1,10 @@
package setup
import (
"log"
"os"
"github.com/miekg/coredns/middleware"
"github.com/miekg/coredns/middleware/file"
"github.com/miekg/dns"
)
// File sets up the file middleware.
@@ -23,8 +20,7 @@ func File(c *Controller) (middleware.Middleware, error) {
}
func fileParse(c *Controller) (file.Zones, error) {
// Maybe multiple, each for each zone.
z := make(map[string]file.Zone)
z := make(map[string]*file.Zone)
names := []string{}
for c.Next() {
if c.Val() == "file" {
@@ -42,7 +38,12 @@ func fileParse(c *Controller) (file.Zones, error) {
// normalize this origin
origin = middleware.Host(origin).StandardHost()
zone, err := parseZone(origin, fileName)
reader, err := os.Open(fileName)
if err != nil {
return file.Zones{}, err
}
zone, err := file.Parse(reader, origin, fileName)
if err == nil {
z[origin] = zone
}
@@ -51,24 +52,3 @@ func fileParse(c *Controller) (file.Zones, error) {
}
return file.Zones{Z: z, Names: names}, nil
}
//
// parsrZone parses the zone in filename and returns a []RR or an error.
func parseZone(origin, fileName string) (file.Zone, error) {
f, err := os.Open(fileName)
if err != nil {
return nil, err
}
tokens := dns.ParseZone(f, origin, fileName)
zone := make([]dns.RR, 0, defaultZoneSize)
for x := range tokens {
if x.Error != nil {
log.Printf("[ERROR] failed to parse %s: %v", origin, x.Error)
return nil, x.Error
}
zone = append(zone, x.RR)
}
return file.Zone(zone), nil
}
const defaultZoneSize = 20 // A made up number.