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xtcp: add configuration to disable assisted addresses in NAT traversal (#4951)

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fatedier
2025-08-25 15:52:52 +08:00
committed by GitHub
parent 14253afe2f
commit 80d3f332e1
8 changed files with 63 additions and 11 deletions
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19
pkg/nathole/nathole.go
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@@ -68,6 +68,13 @@ var (
DetectRoleReceiver = "receiver"
)
// PrepareOptions defines options for NAT traversal preparation
type PrepareOptions struct {
// DisableAssistedAddrs disables the use of local network interfaces
// for assisted connections during NAT traversal
DisableAssistedAddrs bool
}
type PrepareResult struct {
Addrs []string
AssistedAddrs []string
@@ -108,7 +115,7 @@ func PreCheck(
}
// Prepare is used to do some preparation work before penetration.
func Prepare(stunServers []string) (*PrepareResult, error) {
func Prepare(stunServers []string, opts PrepareOptions) (*PrepareResult, error) {
// discover for Nat type
addrs, localAddr, err := Discover(stunServers, "")
if err != nil {
@@ -133,9 +140,13 @@ func Prepare(stunServers []string) (*PrepareResult, error) {
return nil, fmt.Errorf("listen local udp addr error: %v", err)
}
assistedAddrs := make([]string, 0, len(localIPs))
for _, ip := range localIPs {
assistedAddrs = append(assistedAddrs, net.JoinHostPort(ip, strconv.Itoa(laddr.Port)))
// Apply NAT traversal options
var assistedAddrs []string
if !opts.DisableAssistedAddrs {
assistedAddrs = make([]string, 0, len(localIPs))
for _, ip := range localIPs {
assistedAddrs = append(assistedAddrs, net.JoinHostPort(ip, strconv.Itoa(laddr.Port)))
}
}
return &PrepareResult{
Addrs: addrs,