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" M "github.com/sagernet/sing/common/metadata" ) type TunOptions interface { GetInet4Address() RoutePrefixIterator GetInet6Address() RoutePrefixIterator GetDNSServerAddress() (string, error) GetMTU() int32 GetAutoRoute() bool GetStrictRoute() bool GetInet4RouteAddress() RoutePrefixIterator GetInet6RouteAddress() RoutePrefixIterator GetIncludePackage() StringIterator GetExcludePackage() StringIterator IsHTTPProxyEnabled() bool GetHTTPProxyServer() string GetHTTPProxyServerPort() int32 } type RoutePrefix struct { Address string Prefix int32 } func (p *RoutePrefix) Mask() string { var bits int if M.ParseSocksaddr(p.Address).Addr.Is6() { bits = 128 } else { bits = 32 } return net.IP(net.CIDRMask(int(p.Prefix), bits)).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().String(), Prefix: int32(prefix.Bits()), } })) } var _ TunOptions = (*tunOptions)(nil) type tunOptions struct { tun.Options 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) 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) }