sing-box/route/rule_item_ipversion.go

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package route
import (
"github.com/sagernet/sing-box/adapter"
)
var _ RuleItem = (*IPVersionItem)(nil)
type IPVersionItem struct {
isIPv6 bool
}
func NewIPVersionItem(isIPv6 bool) *IPVersionItem {
return &IPVersionItem{isIPv6}
}
func (r *IPVersionItem) Match(metadata *adapter.InboundContext) bool {
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return metadata.IPVersion != 0 && metadata.IPVersion == 6 == r.isIPv6 ||
metadata.Destination.IsIP() && metadata.Destination.IsIPv6() == r.isIPv6
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}
func (r *IPVersionItem) String() string {
var versionStr string
if r.isIPv6 {
versionStr = "6"
} else {
versionStr = "4"
}
return "ip_version=" + versionStr
}