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v2fly/app/router/condition.go

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package router
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import (
"context"
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"strings"
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"v2ray.com/core/app/dispatcher"
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"v2ray.com/core/common/net"
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"v2ray.com/core/common/session"
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"v2ray.com/core/common/strmatcher"
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)
type Condition interface {
Apply(ctx context.Context) bool
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}
type ConditionChan []Condition
func NewConditionChan() *ConditionChan {
var condChan ConditionChan = make([]Condition, 0, 8)
return &condChan
}
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func (v *ConditionChan) Add(cond Condition) *ConditionChan {
*v = append(*v, cond)
return v
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}
func (v *ConditionChan) Apply(ctx context.Context) bool {
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for _, cond := range *v {
if !cond.Apply(ctx) {
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return false
}
}
return true
}
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func (v *ConditionChan) Len() int {
return len(*v)
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}
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var matcherTypeMap = map[Domain_Type]strmatcher.Type{
Domain_Plain: strmatcher.Substr,
Domain_Regex: strmatcher.Regex,
Domain_Domain: strmatcher.Domain,
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Domain_Full: strmatcher.Full,
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}
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func domainToMatcher(domain *Domain) (strmatcher.Matcher, error) {
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matcherType, f := matcherTypeMap[domain.Type]
if !f {
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return nil, newError("unsupported domain type", domain.Type)
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}
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matcher, err := matcherType.New(domain.Value)
if err != nil {
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return nil, newError("failed to create domain matcher").Base(err)
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}
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return matcher, nil
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}
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type DomainMatcher struct {
matchers strmatcher.IndexMatcher
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}
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func NewDomainMatcher(domains []*Domain) (*DomainMatcher, error) {
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g := new(strmatcher.MatcherGroup)
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for _, d := range domains {
m, err := domainToMatcher(d)
if err != nil {
return nil, err
}
g.Add(m)
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}
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return &DomainMatcher{
matchers: g,
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}, nil
}
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func (m *DomainMatcher) ApplyDomain(domain string) bool {
return m.matchers.Match(domain) > 0
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}
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func (m *DomainMatcher) Apply(ctx context.Context) bool {
outbound := session.OutboundFromContext(ctx)
if outbound == nil || !outbound.Target.IsValid() {
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return false
}
dest := outbound.Target
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if !dest.Address.Family().IsDomain() {
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return false
}
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return m.ApplyDomain(dest.Address.Domain())
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}
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
}
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func resolvedIPFromContext(ctx context.Context) []net.IP {
outbound := session.OutboundFromContext(ctx)
if outbound == nil {
return nil
}
return outbound.ResolvedIPs
}
type MultiGeoIPMatcher struct {
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matchers []*GeoIPMatcher
destFunc func(context.Context) net.Destination
resolvedIPFunc func(context.Context) []net.IP
}
func NewMultiGeoIPMatcher(geoips []*GeoIP, onSource bool) (*MultiGeoIPMatcher, error) {
var matchers []*GeoIPMatcher
for _, geoip := range geoips {
matcher, err := globalGeoIPContainer.Add(geoip)
if err != nil {
return nil, err
}
matchers = append(matchers, matcher)
}
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matcher := &MultiGeoIPMatcher{
matchers: matchers,
}
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if onSource {
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matcher.destFunc = sourceFromContext
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} else {
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matcher.destFunc = targetFromContent
matcher.resolvedIPFunc = resolvedIPFromContext
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}
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return matcher, nil
}
func (m *MultiGeoIPMatcher) Apply(ctx context.Context) bool {
ips := make([]net.IP, 0, 4)
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dest := m.destFunc(ctx)
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if dest.IsValid() && dest.Address.Family().IsIP() {
ips = append(ips, dest.Address.IP())
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}
if m.resolvedIPFunc != nil {
rips := m.resolvedIPFunc(ctx)
if len(rips) > 0 {
ips = append(ips, rips...)
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}
}
for _, ip := range ips {
for _, matcher := range m.matchers {
if matcher.Match(ip) {
return true
}
}
}
return false
}
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type PortMatcher struct {
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port net.PortRange
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}
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func NewPortMatcher(portRange net.PortRange) *PortMatcher {
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return &PortMatcher{
port: portRange,
}
}
func (v *PortMatcher) Apply(ctx context.Context) bool {
outbound := session.OutboundFromContext(ctx)
if outbound == nil || !outbound.Target.IsValid() {
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return false
}
return v.port.Contains(outbound.Target.Port)
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}
type NetworkMatcher struct {
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list [8]bool
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}
func NewNetworkMatcher(network []net.Network) NetworkMatcher {
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var matcher NetworkMatcher
for _, n := range network {
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matcher.list[int(n)] = true
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}
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return matcher
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}
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func (v NetworkMatcher) Apply(ctx context.Context) bool {
outbound := session.OutboundFromContext(ctx)
if outbound == nil || !outbound.Target.IsValid() {
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return false
}
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return v.list[int(outbound.Target.Network)]
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}
type UserMatcher struct {
user []string
}
func NewUserMatcher(users []string) *UserMatcher {
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usersCopy := make([]string, 0, len(users))
for _, user := range users {
if len(user) > 0 {
usersCopy = append(usersCopy, user)
}
}
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return &UserMatcher{
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user: usersCopy,
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}
}
func (v *UserMatcher) Apply(ctx context.Context) bool {
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inbound := session.InboundFromContext(ctx)
if inbound == nil {
return false
}
user := inbound.User
if user == nil {
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return false
}
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for _, u := range v.user {
if u == user.Email {
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return true
}
}
return false
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}
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type InboundTagMatcher struct {
tags []string
}
func NewInboundTagMatcher(tags []string) *InboundTagMatcher {
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tagsCopy := make([]string, 0, len(tags))
for _, tag := range tags {
if len(tag) > 0 {
tagsCopy = append(tagsCopy, tag)
}
}
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return &InboundTagMatcher{
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tags: tagsCopy,
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}
}
func (v *InboundTagMatcher) Apply(ctx context.Context) bool {
inbound := session.InboundFromContext(ctx)
if inbound == nil || len(inbound.Tag) == 0 {
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return false
}
tag := inbound.Tag
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for _, t := range v.tags {
if t == tag {
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return true
}
}
return false
}
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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
}