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Merge pull request #15 from jbenet/feat/pluggable
make multiaddr-net more pluggable
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,128 @@ | ||
package manet | ||
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import ( | ||
"fmt" | ||
"net" | ||
"sync" | ||
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ma "github.com/jbenet/go-multiaddr" | ||
) | ||
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type FromNetAddrFunc func(a net.Addr) (ma.Multiaddr, error) | ||
type ToNetAddrFunc func(ma ma.Multiaddr) (net.Addr, error) | ||
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var defaultCodecs *CodecMap | ||
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func init() { | ||
defaultCodecs = NewCodecMap() | ||
defaultCodecs.RegisterNetCodec(tcpAddrSpec) | ||
defaultCodecs.RegisterNetCodec(udpAddrSpec) | ||
defaultCodecs.RegisterNetCodec(utpAddrSpec) | ||
defaultCodecs.RegisterNetCodec(ip4AddrSpec) | ||
defaultCodecs.RegisterNetCodec(ip6AddrSpec) | ||
} | ||
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type CodecMap struct { | ||
codecs map[string]*NetCodec | ||
addrParsers map[string]FromNetAddrFunc | ||
maddrParsers map[string]ToNetAddrFunc | ||
lk sync.Mutex | ||
} | ||
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func NewCodecMap() *CodecMap { | ||
return &CodecMap{ | ||
codecs: make(map[string]*NetCodec), | ||
addrParsers: make(map[string]FromNetAddrFunc), | ||
maddrParsers: make(map[string]ToNetAddrFunc), | ||
} | ||
} | ||
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type NetCodec struct { | ||
// NetAddrNetworks is an array of strings that may be returned | ||
// by net.Addr.Network() calls on addresses belonging to this type | ||
NetAddrNetworks []string | ||
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// ProtocolName is the string value for Multiaddr address keys | ||
ProtocolName string | ||
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// ParseNetAddr parses a net.Addr belonging to this type into a multiaddr | ||
ParseNetAddr FromNetAddrFunc | ||
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// ConvertMultiaddr converts a multiaddr of this type back into a net.Addr | ||
ConvertMultiaddr ToNetAddrFunc | ||
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// Protocol returns the multiaddr protocol struct for this type | ||
Protocol ma.Protocol | ||
} | ||
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func RegisterNetCodec(a *NetCodec) { | ||
defaultCodecs.RegisterNetCodec(a) | ||
} | ||
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func (cm *CodecMap) RegisterNetCodec(a *NetCodec) { | ||
cm.lk.Lock() | ||
defer cm.lk.Unlock() | ||
cm.codecs[a.ProtocolName] = a | ||
for _, n := range a.NetAddrNetworks { | ||
cm.addrParsers[n] = a.ParseNetAddr | ||
} | ||
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cm.maddrParsers[a.ProtocolName] = a.ConvertMultiaddr | ||
} | ||
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var tcpAddrSpec = &NetCodec{ | ||
ProtocolName: "tcp", | ||
NetAddrNetworks: []string{"tcp", "tcp4", "tcp6"}, | ||
ParseNetAddr: parseTcpNetAddr, | ||
ConvertMultiaddr: parseBasicNetMaddr, | ||
} | ||
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var udpAddrSpec = &NetCodec{ | ||
ProtocolName: "udp", | ||
NetAddrNetworks: []string{"udp", "udp4", "udp6"}, | ||
ParseNetAddr: parseUdpNetAddr, | ||
ConvertMultiaddr: parseBasicNetMaddr, | ||
} | ||
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var utpAddrSpec = &NetCodec{ | ||
ProtocolName: "utp", | ||
NetAddrNetworks: []string{"utp", "utp4", "utp6"}, | ||
ParseNetAddr: parseUtpNetAddr, | ||
ConvertMultiaddr: parseBasicNetMaddr, | ||
} | ||
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var ip4AddrSpec = &NetCodec{ | ||
ProtocolName: "ip4", | ||
NetAddrNetworks: []string{"ip4"}, | ||
ParseNetAddr: parseIpNetAddr, | ||
ConvertMultiaddr: parseBasicNetMaddr, | ||
} | ||
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var ip6AddrSpec = &NetCodec{ | ||
ProtocolName: "ip6", | ||
NetAddrNetworks: []string{"ip6"}, | ||
ParseNetAddr: parseIpNetAddr, | ||
ConvertMultiaddr: parseBasicNetMaddr, | ||
} | ||
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func (cm *CodecMap) getAddrParser(net string) (FromNetAddrFunc, error) { | ||
cm.lk.Lock() | ||
defer cm.lk.Unlock() | ||
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parser, ok := cm.addrParsers[net] | ||
if !ok { | ||
return nil, fmt.Errorf("unknown network %v", net) | ||
} | ||
return parser, nil | ||
} | ||
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func (cm *CodecMap) getMaddrParser(name string) (ToNetAddrFunc, error) { | ||
cm.lk.Lock() | ||
defer cm.lk.Unlock() | ||
p, ok := cm.maddrParsers[name] | ||
if !ok { | ||
return nil, fmt.Errorf("network not supported: %s", name) | ||
} | ||
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return p, nil | ||
} |
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