func SetupPortMaps(containerip string, maps []pod.UserContainerPort) error {
if disableIptables || len(maps) == 0 {
return nil
}
for _, m := range maps {
var proto string
if strings.EqualFold(m.Protocol, "udp") {
proto = "udp"
} else {
proto = "tcp"
}
natArgs := []string{"-p", proto, "-m", proto, "--dport",
strconv.Itoa(m.HostPort), "-j", "DNAT", "--to-destination",
net.JoinHostPort(containerip, strconv.Itoa(m.ContainerPort))}
if iptables.PortMapExists("HYPER", natArgs) {
return nil
}
if iptables.PortMapUsed("HYPER", natArgs) {
return fmt.Errorf("Host port %d has aleady been used", m.HostPort)
}
err := iptables.OperatePortMap(iptables.Insert, "HYPER", natArgs)
if err != nil {
return err
}
err = PortMapper.AllocateMap(m.Protocol, m.HostPort, containerip, m.ContainerPort)
if err != nil {
return err
}
filterArgs := []string{"-d", containerip, "-p", proto, "-m", proto,
"--dport", strconv.Itoa(m.ContainerPort), "-j", "ACCEPT"}
if output, err := iptables.Raw(append([]string{"-I", "HYPER"}, filterArgs...)...); err != nil {
return fmt.Errorf("Unable to setup forward rule in HYPER chain: %s", err)
} else if len(output) != 0 {
return &iptables.ChainError{Chain: "HYPER", Output: output}
}
}
/* forbid to map ports twice */
return nil
}
func SetupPortMaps(vmId string, index int, containerip string, maps []pod.UserContainerPort) error {
if len(maps) == 0 {
return nil
}
for _, m := range maps {
var proto string
if strings.EqualFold(m.Protocol, "udp") {
proto = "udp"
} else {
proto = "tcp"
}
if iptables.PortMapExists(proto, strconv.Itoa(m.HostPort)) {
return nil
}
rule := virtualbox.PFRule{}
rule.Proto = virtualbox.PFProto(proto)
rule.HostIP = nil
rule.HostPort = uint16(m.HostPort)
rule.GuestIP = net.ParseIP(containerip)
rule.GuestPort = uint16(m.ContainerPort)
err := virtualbox.SetNATPF(vmId, 1, vmId, rule)
if err != nil {
return err
}
err = portMapper.AllocateMap(m.Protocol, m.HostPort, containerip, m.ContainerPort)
if err != nil {
return err
}
}
/* forbid to map ports twice */
return nil
}