1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
package portmapper
import (
"net"
"sync"
"github.com/docker/libnetwork/iptables"
"github.com/docker/libnetwork/portallocator"
)
// PortMapper manages the network address translation
type PortMapper struct {
bridgeName string
// udp:ip:port
currentMappings map[string]*mapping
lock sync.Mutex
proxyPath string
Allocator *portallocator.PortAllocator
chain *iptables.ChainInfo
}
// SetIptablesChain sets the specified chain into portmapper
func (pm *PortMapper) SetIptablesChain(c *iptables.ChainInfo, bridgeName string) {
pm.chain = c
pm.bridgeName = bridgeName
}
// AppendForwardingTableEntry adds a port mapping to the forwarding table
func (pm *PortMapper) AppendForwardingTableEntry(proto string, sourceIP net.IP, sourcePort int, containerIP string, containerPort int) error {
return pm.forward(iptables.Append, proto, sourceIP, sourcePort, containerIP, containerPort)
}
// DeleteForwardingTableEntry removes a port mapping from the forwarding table
func (pm *PortMapper) DeleteForwardingTableEntry(proto string, sourceIP net.IP, sourcePort int, containerIP string, containerPort int) error {
return pm.forward(iptables.Delete, proto, sourceIP, sourcePort, containerIP, containerPort)
}
func (pm *PortMapper) forward(action iptables.Action, proto string, sourceIP net.IP, sourcePort int, containerIP string, containerPort int) error {
if pm.chain == nil {
return nil
}
return pm.chain.Forward(action, sourceIP, sourcePort, proto, containerIP, containerPort, pm.bridgeName)
}
|
