mirror of
https://github.com/mjl-/mox.git
synced 2024-12-29 09:53:47 +03:00
44 lines
1.1 KiB
Go
44 lines
1.1 KiB
Go
// Copyright 2010 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package adns
|
|
|
|
import (
|
|
"context"
|
|
"net"
|
|
|
|
"github.com/mjl-/adns/internal/bytealg"
|
|
)
|
|
|
|
func parseNetwork(ctx context.Context, network string, needsProto bool) (afnet string, proto int, err error) {
|
|
i := bytealg.LastIndexByteString(network, ':')
|
|
if i < 0 { // no colon
|
|
switch network {
|
|
case "tcp", "tcp4", "tcp6":
|
|
case "udp", "udp4", "udp6":
|
|
case "ip", "ip4", "ip6":
|
|
if needsProto {
|
|
return "", 0, net.UnknownNetworkError(network)
|
|
}
|
|
case "unix", "unixgram", "unixpacket":
|
|
default:
|
|
return "", 0, net.UnknownNetworkError(network)
|
|
}
|
|
return network, 0, nil
|
|
}
|
|
afnet = network[:i]
|
|
switch afnet {
|
|
case "ip", "ip4", "ip6":
|
|
protostr := network[i+1:]
|
|
proto, i, ok := dtoi(protostr)
|
|
if !ok || i != len(protostr) {
|
|
proto, err = lookupProtocol(ctx, protostr)
|
|
if err != nil {
|
|
return "", 0, err
|
|
}
|
|
}
|
|
return afnet, proto, nil
|
|
}
|
|
return "", 0, net.UnknownNetworkError(network)
|
|
}
|