package router import ( "context" "strings" "v2ray.com/core/common/session" "v2ray.com/core/app/dispatcher" "v2ray.com/core/common/net" "v2ray.com/core/common/protocol" "v2ray.com/core/common/strmatcher" "v2ray.com/core/proxy" ) type Condition interface { Apply(ctx context.Context) bool } type ConditionChan []Condition func NewConditionChan() *ConditionChan { var condChan ConditionChan = make([]Condition, 0, 8) return &condChan } func (v *ConditionChan) Add(cond Condition) *ConditionChan { *v = append(*v, cond) return v } func (v *ConditionChan) Apply(ctx context.Context) bool { for _, cond := range *v { if !cond.Apply(ctx) { return false } } return true } func (v *ConditionChan) Len() int { return len(*v) } type AnyCondition []Condition func NewAnyCondition() *AnyCondition { var anyCond AnyCondition = make([]Condition, 0, 8) return &anyCond } func (v *AnyCondition) Add(cond Condition) *AnyCondition { *v = append(*v, cond) return v } func (v *AnyCondition) Apply(ctx context.Context) bool { for _, cond := range *v { if cond.Apply(ctx) { return true } } return false } func (v *AnyCondition) Len() int { return len(*v) } var matcherTypeMap = map[Domain_Type]strmatcher.Type{ Domain_Plain: strmatcher.Substr, Domain_Regex: strmatcher.Regex, Domain_Domain: strmatcher.Domain, Domain_Full: strmatcher.Full, } func domainToMatcher(domain *Domain) (strmatcher.Matcher, error) { matcherType, f := matcherTypeMap[domain.Type] if !f { return nil, newError("unsupported domain type", domain.Type) } matcher, err := matcherType.New(domain.Value) if err != nil { return nil, newError("failed to create domain matcher").Base(err) } return matcher, nil } type DomainMatcher struct { matchers strmatcher.IndexMatcher } func NewDomainMatcher(domains []*Domain) (*DomainMatcher, error) { g := new(strmatcher.MatcherGroup) for _, d := range domains { m, err := domainToMatcher(d) if err != nil { return nil, err } g.Add(m) } return &DomainMatcher{ matchers: g, }, nil } func (m *DomainMatcher) ApplyDomain(domain string) bool { return m.matchers.Match(domain) > 0 } func (m *DomainMatcher) Apply(ctx context.Context) bool { outbound := session.OutboundFromContext(ctx) if outbound == nil || !outbound.Target.IsValid() { return false } dest := outbound.Target if !dest.Address.Family().IsDomain() { return false } return m.ApplyDomain(dest.Address.Domain()) } type CIDRMatcher struct { cidr *net.IPNet onSource bool } func NewCIDRMatcher(ip []byte, mask uint32, onSource bool) (*CIDRMatcher, error) { cidr := &net.IPNet{ IP: net.IP(ip), Mask: net.CIDRMask(int(mask), len(ip)*8), } return &CIDRMatcher{ cidr: cidr, onSource: onSource, }, nil } func sourceFromContext(ctx context.Context) net.Destination { inbound := session.InboundFromContext(ctx) if inbound == nil { return net.Destination{} } return inbound.Source } func targetFromContent(ctx context.Context) net.Destination { outbound := session.OutboundFromContext(ctx) if outbound == nil { return net.Destination{} } return outbound.Target } func (v *CIDRMatcher) Apply(ctx context.Context) bool { ips := make([]net.IP, 0, 4) if resolver, ok := proxy.ResolvedIPsFromContext(ctx); ok { resolvedIPs := resolver.Resolve() for _, rip := range resolvedIPs { if !rip.Family().IsIPv6() { continue } ips = append(ips, rip.IP()) } } var dest net.Destination if v.onSource { dest = sourceFromContext(ctx) } else { dest = targetFromContent(ctx) } if dest.IsValid() && dest.Address.Family().IsIPv6() { ips = append(ips, dest.Address.IP()) } for _, ip := range ips { if v.cidr.Contains(ip) { return true } } return false } type IPv4Matcher struct { ipv4net *net.IPNetTable onSource bool } func NewIPv4Matcher(ipnet *net.IPNetTable, onSource bool) *IPv4Matcher { return &IPv4Matcher{ ipv4net: ipnet, onSource: onSource, } } func (v *IPv4Matcher) Apply(ctx context.Context) bool { ips := make([]net.IP, 0, 4) if resolver, ok := proxy.ResolvedIPsFromContext(ctx); ok { resolvedIPs := resolver.Resolve() for _, rip := range resolvedIPs { if !rip.Family().IsIPv4() { continue } ips = append(ips, rip.IP()) } } var dest net.Destination if v.onSource { dest = sourceFromContext(ctx) } else { dest = targetFromContent(ctx) } if dest.IsValid() && dest.Address.Family().IsIPv4() { ips = append(ips, dest.Address.IP()) } for _, ip := range ips { if v.ipv4net.Contains(ip) { return true } } return false } type PortMatcher struct { port net.PortRange } func NewPortMatcher(portRange net.PortRange) *PortMatcher { return &PortMatcher{ port: portRange, } } func (v *PortMatcher) Apply(ctx context.Context) bool { outbound := session.OutboundFromContext(ctx) if outbound == nil || !outbound.Target.IsValid() { return false } return v.port.Contains(outbound.Target.Port) } type NetworkMatcher struct { network *net.NetworkList } func NewNetworkMatcher(network *net.NetworkList) *NetworkMatcher { return &NetworkMatcher{ network: network, } } func (v *NetworkMatcher) Apply(ctx context.Context) bool { outbound := session.OutboundFromContext(ctx) if outbound == nil || !outbound.Target.IsValid() { return false } return v.network.HasNetwork(outbound.Target.Network) } type UserMatcher struct { user []string } func NewUserMatcher(users []string) *UserMatcher { usersCopy := make([]string, 0, len(users)) for _, user := range users { if len(user) > 0 { usersCopy = append(usersCopy, user) } } return &UserMatcher{ user: usersCopy, } } func (v *UserMatcher) Apply(ctx context.Context) bool { user := protocol.UserFromContext(ctx) if user == nil { return false } for _, u := range v.user { if u == user.Email { return true } } return false } type InboundTagMatcher struct { tags []string } func NewInboundTagMatcher(tags []string) *InboundTagMatcher { tagsCopy := make([]string, 0, len(tags)) for _, tag := range tags { if len(tag) > 0 { tagsCopy = append(tagsCopy, tag) } } return &InboundTagMatcher{ tags: tagsCopy, } } func (v *InboundTagMatcher) Apply(ctx context.Context) bool { inbound := session.InboundFromContext(ctx) if inbound == nil || len(inbound.Tag) == 0 { return false } tag := inbound.Tag for _, t := range v.tags { if t == tag { return true } } return false } type ProtocolMatcher struct { protocols []string } func NewProtocolMatcher(protocols []string) *ProtocolMatcher { pCopy := make([]string, 0, len(protocols)) for _, p := range protocols { if len(p) > 0 { pCopy = append(pCopy, p) } } return &ProtocolMatcher{ protocols: pCopy, } } func (m *ProtocolMatcher) Apply(ctx context.Context) bool { result := dispatcher.SniffingResultFromContext(ctx) if result == nil { return false } protocol := result.Protocol() for _, p := range m.protocols { if strings.HasPrefix(protocol, p) { return true } } return false }