f5d6af13d0
It was only accessed through methods on PortMapper, and in tests. Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
46 lines
1.5 KiB
Go
46 lines
1.5 KiB
Go
package portmapper
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import (
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"net"
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"sync"
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"github.com/docker/docker/libnetwork/iptables"
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"github.com/docker/docker/libnetwork/portallocator"
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)
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// PortMapper manages the network address translation
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type PortMapper struct {
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bridgeName string
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// udp:ip:port
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currentMappings map[string]*mapping
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lock sync.Mutex
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proxyPath string
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allocator *portallocator.PortAllocator
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chain *iptables.ChainInfo
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}
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// SetIptablesChain sets the specified chain into portmapper
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func (pm *PortMapper) SetIptablesChain(c *iptables.ChainInfo, bridgeName string) {
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pm.chain = c
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pm.bridgeName = bridgeName
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}
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// AppendForwardingTableEntry adds a port mapping to the forwarding table
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func (pm *PortMapper) AppendForwardingTableEntry(proto string, sourceIP net.IP, sourcePort int, containerIP string, containerPort int) error {
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return pm.forward(iptables.Append, proto, sourceIP, sourcePort, containerIP, containerPort)
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}
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// DeleteForwardingTableEntry removes a port mapping from the forwarding table
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func (pm *PortMapper) DeleteForwardingTableEntry(proto string, sourceIP net.IP, sourcePort int, containerIP string, containerPort int) error {
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return pm.forward(iptables.Delete, proto, sourceIP, sourcePort, containerIP, containerPort)
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}
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func (pm *PortMapper) forward(action iptables.Action, proto string, sourceIP net.IP, sourcePort int, containerIP string, containerPort int) error {
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if pm.chain == nil {
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return nil
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}
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return pm.chain.Forward(action, sourceIP, sourcePort, proto, containerIP, containerPort, pm.bridgeName)
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}
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