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package main
import (
"net"
"strings"
"github.com/containers/common/pkg/machine"
rkport "github.com/rootless-containers/rootlesskit/pkg/port"
)
// WSL machines do not relay ipv4 traffic to dual-stack ports, simulate instead
func splitDualStackSpecIfWsl(spec rkport.Spec) []rkport.Spec {
specs := []rkport.Spec{spec}
protocol := spec.Proto
if machine.MachineHostType() != machine.Wsl || strings.HasSuffix(protocol, "4") || strings.HasSuffix(protocol, "6") {
return specs
}
ip := net.ParseIP(spec.ParentIP)
splitLoopback := ip.IsLoopback() && ip.To4() == nil
// Map ::1 and 0.0.0.0/:: to ipv4 + ipv6 to simulate dual-stack
if ip.IsUnspecified() || splitLoopback {
specs = append(specs, spec)
specs[0].Proto = protocol + "4"
specs[1].Proto = protocol + "6"
if splitLoopback {
// Hacky, but we will only have one ipv4 loopback with WSL config
specs[0].ParentIP = "127.0.0.1"
}
if ip.IsUnspecified() {
specs[0].ParentIP = "0.0.0.0"
specs[1].ParentIP = "::"
}
}
return specs
}
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