d1f17fa7e0
Move all (almost all) Go files in middleware into their own packages. This makes for better naming and discoverability. Lot of changes elsewhere to make this change. The middleware.State was renamed to request.Request which is better, but still does not cover all use-cases. It was also moved out middleware because it is used by `dnsserver` as well. A pkg/dnsutil packages was added for shared, handy, dns util functions. All normalize functions are now put in normalize.go
59 lines
1.4 KiB
Go
59 lines
1.4 KiB
Go
package file
|
|
|
|
import (
|
|
"fmt"
|
|
"log"
|
|
|
|
"github.com/miekg/coredns/request"
|
|
|
|
"github.com/miekg/dns"
|
|
"golang.org/x/net/context"
|
|
)
|
|
|
|
type (
|
|
Xfr struct {
|
|
*Zone
|
|
}
|
|
)
|
|
|
|
// Serve an AXFR (and fallback of IXFR) as well.
|
|
func (x Xfr) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) (int, error) {
|
|
state := request.Request{W: w, Req: r}
|
|
if !x.TransferAllowed(state) {
|
|
return dns.RcodeServerFailure, nil
|
|
}
|
|
if state.QType() != dns.TypeAXFR && state.QType() != dns.TypeIXFR {
|
|
return 0, fmt.Errorf("xfr called with non transfer type: %d", state.QType())
|
|
}
|
|
|
|
records := x.All()
|
|
if len(records) == 0 {
|
|
return dns.RcodeServerFailure, nil
|
|
}
|
|
|
|
ch := make(chan *dns.Envelope)
|
|
defer close(ch)
|
|
tr := new(dns.Transfer)
|
|
go tr.Out(w, r, ch)
|
|
|
|
j, l := 0, 0
|
|
records = append(records, records[0]) // add closing SOA to the end
|
|
log.Printf("[INFO] Outgoing transfer of %d records of zone %s to %s started", len(records), x.origin, state.IP())
|
|
for i, r := range records {
|
|
l += dns.Len(r)
|
|
if l > transferLength {
|
|
ch <- &dns.Envelope{RR: records[j:i]}
|
|
l = 0
|
|
j = i
|
|
}
|
|
}
|
|
if j < len(records) {
|
|
ch <- &dns.Envelope{RR: records[j:]}
|
|
}
|
|
|
|
w.Hijack()
|
|
// w.Close() // Client closes connection
|
|
return dns.RcodeSuccess, nil
|
|
}
|
|
|
|
const transferLength = 1000 // Start a new envelop after message reaches this size in bytes. Intentionally small to test multi envelope parsing.
|