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