package libbox import ( "net" "net/netip" "github.com/sagernet/sing-box/option" "github.com/sagernet/sing-tun" "github.com/sagernet/sing/common" E "github.com/sagernet/sing/common/exceptions" ) type TunOptions interface { GetInet4Address() RoutePrefixIterator GetInet6Address() RoutePrefixIterator GetDNSServerAddress() (string, error) GetMTU() int32 GetAutoRoute() bool GetStrictRoute() bool GetInet4RouteAddress() RoutePrefixIterator GetInet6RouteAddress() RoutePrefixIterator GetInet4RouteExcludeAddress() RoutePrefixIterator GetInet6RouteExcludeAddress() RoutePrefixIterator GetInet4RouteRange() RoutePrefixIterator GetInet6RouteRange() RoutePrefixIterator GetIncludePackage() StringIterator GetExcludePackage() StringIterator IsHTTPProxyEnabled() bool GetHTTPProxyServer() string GetHTTPProxyServerPort() int32 } type RoutePrefix struct { address netip.Addr prefix int } func (p *RoutePrefix) Address() string { return p.address.String() } func (p *RoutePrefix) Prefix() int32 { return int32(p.prefix) } func (p *RoutePrefix) Mask() string { var bits int if p.address.Is6() { bits = 128 } else { bits = 32 } return net.IP(net.CIDRMask(p.prefix, bits)).String() } func (p *RoutePrefix) String() string { return netip.PrefixFrom(p.address, p.prefix).String() } type RoutePrefixIterator interface { Next() *RoutePrefix HasNext() bool } func mapRoutePrefix(prefixes []netip.Prefix) RoutePrefixIterator { return newIterator(common.Map(prefixes, func(prefix netip.Prefix) *RoutePrefix { return &RoutePrefix{ address: prefix.Addr(), prefix: prefix.Bits(), } })) } var _ TunOptions = (*tunOptions)(nil) type tunOptions struct { *tun.Options routeRanges []netip.Prefix option.TunPlatformOptions } func (o *tunOptions) GetInet4Address() RoutePrefixIterator { return mapRoutePrefix(o.Inet4Address) } func (o *tunOptions) GetInet6Address() RoutePrefixIterator { return mapRoutePrefix(o.Inet6Address) } func (o *tunOptions) GetDNSServerAddress() (string, error) { if len(o.Inet4Address) == 0 || o.Inet4Address[0].Bits() == 32 { return "", E.New("need one more IPv4 address for DNS hijacking") } return o.Inet4Address[0].Addr().Next().String(), nil } func (o *tunOptions) GetMTU() int32 { return int32(o.MTU) } func (o *tunOptions) GetAutoRoute() bool { return o.AutoRoute } func (o *tunOptions) GetStrictRoute() bool { return o.StrictRoute } func (o *tunOptions) GetInet4RouteAddress() RoutePrefixIterator { return mapRoutePrefix(o.Inet4RouteAddress) } func (o *tunOptions) GetInet6RouteAddress() RoutePrefixIterator { return mapRoutePrefix(o.Inet6RouteAddress) } func (o *tunOptions) GetInet4RouteExcludeAddress() RoutePrefixIterator { return mapRoutePrefix(o.Inet4RouteExcludeAddress) } func (o *tunOptions) GetInet6RouteExcludeAddress() RoutePrefixIterator { return mapRoutePrefix(o.Inet6RouteExcludeAddress) } func (o *tunOptions) GetInet4RouteRange() RoutePrefixIterator { return mapRoutePrefix(common.Filter(o.routeRanges, func(it netip.Prefix) bool { return it.Addr().Is4() })) } func (o *tunOptions) GetInet6RouteRange() RoutePrefixIterator { return mapRoutePrefix(common.Filter(o.routeRanges, func(it netip.Prefix) bool { return it.Addr().Is6() })) } func (o *tunOptions) GetIncludePackage() StringIterator { return newIterator(o.IncludePackage) } func (o *tunOptions) GetExcludePackage() StringIterator { return newIterator(o.ExcludePackage) } func (o *tunOptions) IsHTTPProxyEnabled() bool { if o.TunPlatformOptions.HTTPProxy == nil { return false } return o.TunPlatformOptions.HTTPProxy.Enabled } func (o *tunOptions) GetHTTPProxyServer() string { return o.TunPlatformOptions.HTTPProxy.Server } func (o *tunOptions) GetHTTPProxyServerPort() int32 { return int32(o.TunPlatformOptions.HTTPProxy.ServerPort) }