mirror of
https://github.com/XTLS/Xray-core.git
synced 2024-12-23 20:03:32 +02:00
658 lines
16 KiB
Go
658 lines
16 KiB
Go
package conf
|
|
|
|
import (
|
|
"encoding/json"
|
|
"runtime"
|
|
"strconv"
|
|
"strings"
|
|
|
|
"github.com/xtls/xray-core/app/router"
|
|
"github.com/xtls/xray-core/common/errors"
|
|
"github.com/xtls/xray-core/common/net"
|
|
"github.com/xtls/xray-core/common/platform/filesystem"
|
|
"github.com/xtls/xray-core/common/serial"
|
|
"google.golang.org/protobuf/proto"
|
|
)
|
|
|
|
// StrategyConfig represents a strategy config
|
|
type StrategyConfig struct {
|
|
Type string `json:"type"`
|
|
Settings *json.RawMessage `json:"settings"`
|
|
}
|
|
|
|
type BalancingRule struct {
|
|
Tag string `json:"tag"`
|
|
Selectors StringList `json:"selector"`
|
|
Strategy StrategyConfig `json:"strategy"`
|
|
FallbackTag string `json:"fallbackTag"`
|
|
}
|
|
|
|
// Build builds the balancing rule
|
|
func (r *BalancingRule) Build() (*router.BalancingRule, error) {
|
|
if r.Tag == "" {
|
|
return nil, errors.New("empty balancer tag")
|
|
}
|
|
if len(r.Selectors) == 0 {
|
|
return nil, errors.New("empty selector list")
|
|
}
|
|
|
|
r.Strategy.Type = strings.ToLower(r.Strategy.Type)
|
|
switch r.Strategy.Type {
|
|
case "":
|
|
r.Strategy.Type = strategyRandom
|
|
case strategyRandom, strategyLeastLoad, strategyLeastPing, strategyRoundRobin:
|
|
default:
|
|
return nil, errors.New("unknown balancing strategy: " + r.Strategy.Type)
|
|
}
|
|
|
|
settings := []byte("{}")
|
|
if r.Strategy.Settings != nil {
|
|
settings = ([]byte)(*r.Strategy.Settings)
|
|
}
|
|
rawConfig, err := strategyConfigLoader.LoadWithID(settings, r.Strategy.Type)
|
|
if err != nil {
|
|
return nil, errors.New("failed to parse to strategy config.").Base(err)
|
|
}
|
|
var ts proto.Message
|
|
if builder, ok := rawConfig.(Buildable); ok {
|
|
ts, err = builder.Build()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
return &router.BalancingRule{
|
|
Strategy: r.Strategy.Type,
|
|
StrategySettings: serial.ToTypedMessage(ts),
|
|
FallbackTag: r.FallbackTag,
|
|
OutboundSelector: r.Selectors,
|
|
Tag: r.Tag,
|
|
}, nil
|
|
}
|
|
|
|
type RouterConfig struct {
|
|
RuleList []json.RawMessage `json:"rules"`
|
|
DomainStrategy *string `json:"domainStrategy"`
|
|
Balancers []*BalancingRule `json:"balancers"`
|
|
|
|
DomainMatcher string `json:"domainMatcher"`
|
|
}
|
|
|
|
func (c *RouterConfig) getDomainStrategy() router.Config_DomainStrategy {
|
|
ds := ""
|
|
if c.DomainStrategy != nil {
|
|
ds = *c.DomainStrategy
|
|
}
|
|
|
|
switch strings.ToLower(ds) {
|
|
case "alwaysip":
|
|
return router.Config_UseIp
|
|
case "ipifnonmatch":
|
|
return router.Config_IpIfNonMatch
|
|
case "ipondemand":
|
|
return router.Config_IpOnDemand
|
|
default:
|
|
return router.Config_AsIs
|
|
}
|
|
}
|
|
|
|
func (c *RouterConfig) Build() (*router.Config, error) {
|
|
config := new(router.Config)
|
|
config.DomainStrategy = c.getDomainStrategy()
|
|
|
|
var rawRuleList []json.RawMessage
|
|
if c != nil {
|
|
rawRuleList = c.RuleList
|
|
}
|
|
|
|
for _, rawRule := range rawRuleList {
|
|
rule, err := ParseRule(rawRule)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if rule.DomainMatcher == "" {
|
|
rule.DomainMatcher = c.DomainMatcher
|
|
}
|
|
|
|
config.Rule = append(config.Rule, rule)
|
|
}
|
|
for _, rawBalancer := range c.Balancers {
|
|
balancer, err := rawBalancer.Build()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
config.BalancingRule = append(config.BalancingRule, balancer)
|
|
}
|
|
return config, nil
|
|
}
|
|
|
|
type RouterRule struct {
|
|
RuleTag string `json:"ruleTag"`
|
|
Type string `json:"type"`
|
|
OutboundTag string `json:"outboundTag"`
|
|
BalancerTag string `json:"balancerTag"`
|
|
|
|
DomainMatcher string `json:"domainMatcher"`
|
|
}
|
|
|
|
func ParseIP(s string) (*router.CIDR, error) {
|
|
var addr, mask string
|
|
i := strings.Index(s, "/")
|
|
if i < 0 {
|
|
addr = s
|
|
} else {
|
|
addr = s[:i]
|
|
mask = s[i+1:]
|
|
}
|
|
ip := net.ParseAddress(addr)
|
|
switch ip.Family() {
|
|
case net.AddressFamilyIPv4:
|
|
bits := uint32(32)
|
|
if len(mask) > 0 {
|
|
bits64, err := strconv.ParseUint(mask, 10, 32)
|
|
if err != nil {
|
|
return nil, errors.New("invalid network mask for router: ", mask).Base(err)
|
|
}
|
|
bits = uint32(bits64)
|
|
}
|
|
if bits > 32 {
|
|
return nil, errors.New("invalid network mask for router: ", bits)
|
|
}
|
|
return &router.CIDR{
|
|
Ip: []byte(ip.IP()),
|
|
Prefix: bits,
|
|
}, nil
|
|
case net.AddressFamilyIPv6:
|
|
bits := uint32(128)
|
|
if len(mask) > 0 {
|
|
bits64, err := strconv.ParseUint(mask, 10, 32)
|
|
if err != nil {
|
|
return nil, errors.New("invalid network mask for router: ", mask).Base(err)
|
|
}
|
|
bits = uint32(bits64)
|
|
}
|
|
if bits > 128 {
|
|
return nil, errors.New("invalid network mask for router: ", bits)
|
|
}
|
|
return &router.CIDR{
|
|
Ip: []byte(ip.IP()),
|
|
Prefix: bits,
|
|
}, nil
|
|
default:
|
|
return nil, errors.New("unsupported address for router: ", s)
|
|
}
|
|
}
|
|
|
|
func loadGeoIP(code string) ([]*router.CIDR, error) {
|
|
return loadIP("geoip.dat", code)
|
|
}
|
|
|
|
var (
|
|
FileCache = make(map[string][]byte)
|
|
IPCache = make(map[string]*router.GeoIP)
|
|
SiteCache = make(map[string]*router.GeoSite)
|
|
)
|
|
|
|
func loadFile(file string) ([]byte, error) {
|
|
if FileCache[file] == nil {
|
|
bs, err := filesystem.ReadAsset(file)
|
|
if err != nil {
|
|
return nil, errors.New("failed to open file: ", file).Base(err)
|
|
}
|
|
if len(bs) == 0 {
|
|
return nil, errors.New("empty file: ", file)
|
|
}
|
|
// Do not cache file, may save RAM when there
|
|
// are many files, but consume CPU each time.
|
|
return bs, nil
|
|
FileCache[file] = bs
|
|
}
|
|
return FileCache[file], nil
|
|
}
|
|
|
|
func loadIP(file, code string) ([]*router.CIDR, error) {
|
|
index := file + ":" + code
|
|
if IPCache[index] == nil {
|
|
bs, err := loadFile(file)
|
|
if err != nil {
|
|
return nil, errors.New("failed to load file: ", file).Base(err)
|
|
}
|
|
bs = find(bs, []byte(code))
|
|
if bs == nil {
|
|
return nil, errors.New("code not found in ", file, ": ", code)
|
|
}
|
|
var geoip router.GeoIP
|
|
if err := proto.Unmarshal(bs, &geoip); err != nil {
|
|
return nil, errors.New("error unmarshal IP in ", file, ": ", code).Base(err)
|
|
}
|
|
defer runtime.GC() // or debug.FreeOSMemory()
|
|
return geoip.Cidr, nil // do not cache geoip
|
|
IPCache[index] = &geoip
|
|
}
|
|
return IPCache[index].Cidr, nil
|
|
}
|
|
|
|
func loadSite(file, code string) ([]*router.Domain, error) {
|
|
index := file + ":" + code
|
|
if SiteCache[index] == nil {
|
|
bs, err := loadFile(file)
|
|
if err != nil {
|
|
return nil, errors.New("failed to load file: ", file).Base(err)
|
|
}
|
|
bs = find(bs, []byte(code))
|
|
if bs == nil {
|
|
return nil, errors.New("list not found in ", file, ": ", code)
|
|
}
|
|
var geosite router.GeoSite
|
|
if err := proto.Unmarshal(bs, &geosite); err != nil {
|
|
return nil, errors.New("error unmarshal Site in ", file, ": ", code).Base(err)
|
|
}
|
|
defer runtime.GC() // or debug.FreeOSMemory()
|
|
return geosite.Domain, nil // do not cache geosite
|
|
SiteCache[index] = &geosite
|
|
}
|
|
return SiteCache[index].Domain, nil
|
|
}
|
|
|
|
func DecodeVarint(buf []byte) (x uint64, n int) {
|
|
for shift := uint(0); shift < 64; shift += 7 {
|
|
if n >= len(buf) {
|
|
return 0, 0
|
|
}
|
|
b := uint64(buf[n])
|
|
n++
|
|
x |= (b & 0x7F) << shift
|
|
if (b & 0x80) == 0 {
|
|
return x, n
|
|
}
|
|
}
|
|
|
|
// The number is too large to represent in a 64-bit value.
|
|
return 0, 0
|
|
}
|
|
|
|
func find(data, code []byte) []byte {
|
|
codeL := len(code)
|
|
if codeL == 0 {
|
|
return nil
|
|
}
|
|
for {
|
|
dataL := len(data)
|
|
if dataL < 2 {
|
|
return nil
|
|
}
|
|
x, y := DecodeVarint(data[1:])
|
|
if x == 0 && y == 0 {
|
|
return nil
|
|
}
|
|
headL, bodyL := 1+y, int(x)
|
|
dataL -= headL
|
|
if dataL < bodyL {
|
|
return nil
|
|
}
|
|
data = data[headL:]
|
|
if int(data[1]) == codeL {
|
|
for i := 0; i < codeL && data[2+i] == code[i]; i++ {
|
|
if i+1 == codeL {
|
|
return data[:bodyL]
|
|
}
|
|
}
|
|
}
|
|
if dataL == bodyL {
|
|
return nil
|
|
}
|
|
data = data[bodyL:]
|
|
}
|
|
}
|
|
|
|
type AttributeMatcher interface {
|
|
Match(*router.Domain) bool
|
|
}
|
|
|
|
type BooleanMatcher string
|
|
|
|
func (m BooleanMatcher) Match(domain *router.Domain) bool {
|
|
for _, attr := range domain.Attribute {
|
|
if attr.Key == string(m) {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
type AttributeList struct {
|
|
matcher []AttributeMatcher
|
|
}
|
|
|
|
func (al *AttributeList) Match(domain *router.Domain) bool {
|
|
for _, matcher := range al.matcher {
|
|
if !matcher.Match(domain) {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
func (al *AttributeList) IsEmpty() bool {
|
|
return len(al.matcher) == 0
|
|
}
|
|
|
|
func parseAttrs(attrs []string) *AttributeList {
|
|
al := new(AttributeList)
|
|
for _, attr := range attrs {
|
|
lc := strings.ToLower(attr)
|
|
al.matcher = append(al.matcher, BooleanMatcher(lc))
|
|
}
|
|
return al
|
|
}
|
|
|
|
func loadGeositeWithAttr(file string, siteWithAttr string) ([]*router.Domain, error) {
|
|
parts := strings.Split(siteWithAttr, "@")
|
|
if len(parts) == 0 {
|
|
return nil, errors.New("empty site")
|
|
}
|
|
country := strings.ToUpper(parts[0])
|
|
attrs := parseAttrs(parts[1:])
|
|
domains, err := loadSite(file, country)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if attrs.IsEmpty() {
|
|
return domains, nil
|
|
}
|
|
|
|
filteredDomains := make([]*router.Domain, 0, len(domains))
|
|
for _, domain := range domains {
|
|
if attrs.Match(domain) {
|
|
filteredDomains = append(filteredDomains, domain)
|
|
}
|
|
}
|
|
|
|
return filteredDomains, nil
|
|
}
|
|
|
|
func parseDomainRule(domain string) ([]*router.Domain, error) {
|
|
if strings.HasPrefix(domain, "geosite:") {
|
|
country := strings.ToUpper(domain[8:])
|
|
domains, err := loadGeositeWithAttr("geosite.dat", country)
|
|
if err != nil {
|
|
return nil, errors.New("failed to load geosite: ", country).Base(err)
|
|
}
|
|
return domains, nil
|
|
}
|
|
isExtDatFile := 0
|
|
{
|
|
const prefix = "ext:"
|
|
if strings.HasPrefix(domain, prefix) {
|
|
isExtDatFile = len(prefix)
|
|
}
|
|
const prefixQualified = "ext-domain:"
|
|
if strings.HasPrefix(domain, prefixQualified) {
|
|
isExtDatFile = len(prefixQualified)
|
|
}
|
|
}
|
|
if isExtDatFile != 0 {
|
|
kv := strings.Split(domain[isExtDatFile:], ":")
|
|
if len(kv) != 2 {
|
|
return nil, errors.New("invalid external resource: ", domain)
|
|
}
|
|
filename := kv[0]
|
|
country := kv[1]
|
|
domains, err := loadGeositeWithAttr(filename, country)
|
|
if err != nil {
|
|
return nil, errors.New("failed to load external sites: ", country, " from ", filename).Base(err)
|
|
}
|
|
return domains, nil
|
|
}
|
|
|
|
domainRule := new(router.Domain)
|
|
switch {
|
|
case strings.HasPrefix(domain, "regexp:"):
|
|
domainRule.Type = router.Domain_Regex
|
|
domainRule.Value = domain[7:]
|
|
|
|
case strings.HasPrefix(domain, "domain:"):
|
|
domainRule.Type = router.Domain_Domain
|
|
domainRule.Value = domain[7:]
|
|
|
|
case strings.HasPrefix(domain, "full:"):
|
|
domainRule.Type = router.Domain_Full
|
|
domainRule.Value = domain[5:]
|
|
|
|
case strings.HasPrefix(domain, "keyword:"):
|
|
domainRule.Type = router.Domain_Plain
|
|
domainRule.Value = domain[8:]
|
|
|
|
case strings.HasPrefix(domain, "dotless:"):
|
|
domainRule.Type = router.Domain_Regex
|
|
switch substr := domain[8:]; {
|
|
case substr == "":
|
|
domainRule.Value = "^[^.]*$"
|
|
case !strings.Contains(substr, "."):
|
|
domainRule.Value = "^[^.]*" + substr + "[^.]*$"
|
|
default:
|
|
return nil, errors.New("substr in dotless rule should not contain a dot: ", substr)
|
|
}
|
|
|
|
default:
|
|
domainRule.Type = router.Domain_Plain
|
|
domainRule.Value = domain
|
|
}
|
|
return []*router.Domain{domainRule}, nil
|
|
}
|
|
|
|
func ToCidrList(ips StringList) ([]*router.GeoIP, error) {
|
|
var geoipList []*router.GeoIP
|
|
var customCidrs []*router.CIDR
|
|
|
|
for _, ip := range ips {
|
|
if strings.HasPrefix(ip, "geoip:") {
|
|
country := ip[6:]
|
|
isReverseMatch := false
|
|
if strings.HasPrefix(ip, "geoip:!") {
|
|
country = ip[7:]
|
|
isReverseMatch = true
|
|
}
|
|
if len(country) == 0 {
|
|
return nil, errors.New("empty country name in rule")
|
|
}
|
|
geoip, err := loadGeoIP(strings.ToUpper(country))
|
|
if err != nil {
|
|
return nil, errors.New("failed to load GeoIP: ", country).Base(err)
|
|
}
|
|
|
|
geoipList = append(geoipList, &router.GeoIP{
|
|
CountryCode: strings.ToUpper(country),
|
|
Cidr: geoip,
|
|
ReverseMatch: isReverseMatch,
|
|
})
|
|
continue
|
|
}
|
|
isExtDatFile := 0
|
|
{
|
|
const prefix = "ext:"
|
|
if strings.HasPrefix(ip, prefix) {
|
|
isExtDatFile = len(prefix)
|
|
}
|
|
const prefixQualified = "ext-ip:"
|
|
if strings.HasPrefix(ip, prefixQualified) {
|
|
isExtDatFile = len(prefixQualified)
|
|
}
|
|
}
|
|
if isExtDatFile != 0 {
|
|
kv := strings.Split(ip[isExtDatFile:], ":")
|
|
if len(kv) != 2 {
|
|
return nil, errors.New("invalid external resource: ", ip)
|
|
}
|
|
|
|
filename := kv[0]
|
|
country := kv[1]
|
|
if len(filename) == 0 || len(country) == 0 {
|
|
return nil, errors.New("empty filename or empty country in rule")
|
|
}
|
|
|
|
isReverseMatch := false
|
|
if strings.HasPrefix(country, "!") {
|
|
country = country[1:]
|
|
isReverseMatch = true
|
|
}
|
|
geoip, err := loadIP(filename, strings.ToUpper(country))
|
|
if err != nil {
|
|
return nil, errors.New("failed to load IPs: ", country, " from ", filename).Base(err)
|
|
}
|
|
|
|
geoipList = append(geoipList, &router.GeoIP{
|
|
CountryCode: strings.ToUpper(filename + "_" + country),
|
|
Cidr: geoip,
|
|
ReverseMatch: isReverseMatch,
|
|
})
|
|
|
|
continue
|
|
}
|
|
|
|
ipRule, err := ParseIP(ip)
|
|
if err != nil {
|
|
return nil, errors.New("invalid IP: ", ip).Base(err)
|
|
}
|
|
customCidrs = append(customCidrs, ipRule)
|
|
}
|
|
|
|
if len(customCidrs) > 0 {
|
|
geoipList = append(geoipList, &router.GeoIP{
|
|
Cidr: customCidrs,
|
|
})
|
|
}
|
|
|
|
return geoipList, nil
|
|
}
|
|
|
|
func parseFieldRule(msg json.RawMessage) (*router.RoutingRule, error) {
|
|
type RawFieldRule struct {
|
|
RouterRule
|
|
Domain *StringList `json:"domain"`
|
|
Domains *StringList `json:"domains"`
|
|
IP *StringList `json:"ip"`
|
|
Port *PortList `json:"port"`
|
|
Network *NetworkList `json:"network"`
|
|
SourceIP *StringList `json:"source"`
|
|
SourcePort *PortList `json:"sourcePort"`
|
|
User *StringList `json:"user"`
|
|
InboundTag *StringList `json:"inboundTag"`
|
|
Protocols *StringList `json:"protocol"`
|
|
Attributes map[string]string `json:"attrs"`
|
|
}
|
|
rawFieldRule := new(RawFieldRule)
|
|
err := json.Unmarshal(msg, rawFieldRule)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
rule := new(router.RoutingRule)
|
|
rule.RuleTag = rawFieldRule.RuleTag
|
|
switch {
|
|
case len(rawFieldRule.OutboundTag) > 0:
|
|
rule.TargetTag = &router.RoutingRule_Tag{
|
|
Tag: rawFieldRule.OutboundTag,
|
|
}
|
|
case len(rawFieldRule.BalancerTag) > 0:
|
|
rule.TargetTag = &router.RoutingRule_BalancingTag{
|
|
BalancingTag: rawFieldRule.BalancerTag,
|
|
}
|
|
default:
|
|
return nil, errors.New("neither outboundTag nor balancerTag is specified in routing rule")
|
|
}
|
|
|
|
if rawFieldRule.DomainMatcher != "" {
|
|
rule.DomainMatcher = rawFieldRule.DomainMatcher
|
|
}
|
|
|
|
if rawFieldRule.Domain != nil {
|
|
for _, domain := range *rawFieldRule.Domain {
|
|
rules, err := parseDomainRule(domain)
|
|
if err != nil {
|
|
return nil, errors.New("failed to parse domain rule: ", domain).Base(err)
|
|
}
|
|
rule.Domain = append(rule.Domain, rules...)
|
|
}
|
|
}
|
|
|
|
if rawFieldRule.Domains != nil {
|
|
for _, domain := range *rawFieldRule.Domains {
|
|
rules, err := parseDomainRule(domain)
|
|
if err != nil {
|
|
return nil, errors.New("failed to parse domain rule: ", domain).Base(err)
|
|
}
|
|
rule.Domain = append(rule.Domain, rules...)
|
|
}
|
|
}
|
|
|
|
if rawFieldRule.IP != nil {
|
|
geoipList, err := ToCidrList(*rawFieldRule.IP)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
rule.Geoip = geoipList
|
|
}
|
|
|
|
if rawFieldRule.Port != nil {
|
|
rule.PortList = rawFieldRule.Port.Build()
|
|
}
|
|
|
|
if rawFieldRule.Network != nil {
|
|
rule.Networks = rawFieldRule.Network.Build()
|
|
}
|
|
|
|
if rawFieldRule.SourceIP != nil {
|
|
geoipList, err := ToCidrList(*rawFieldRule.SourceIP)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
rule.SourceGeoip = geoipList
|
|
}
|
|
|
|
if rawFieldRule.SourcePort != nil {
|
|
rule.SourcePortList = rawFieldRule.SourcePort.Build()
|
|
}
|
|
|
|
if rawFieldRule.User != nil {
|
|
for _, s := range *rawFieldRule.User {
|
|
rule.UserEmail = append(rule.UserEmail, s)
|
|
}
|
|
}
|
|
|
|
if rawFieldRule.InboundTag != nil {
|
|
for _, s := range *rawFieldRule.InboundTag {
|
|
rule.InboundTag = append(rule.InboundTag, s)
|
|
}
|
|
}
|
|
|
|
if rawFieldRule.Protocols != nil {
|
|
for _, s := range *rawFieldRule.Protocols {
|
|
rule.Protocol = append(rule.Protocol, s)
|
|
}
|
|
}
|
|
|
|
if len(rawFieldRule.Attributes) > 0 {
|
|
rule.Attributes = rawFieldRule.Attributes
|
|
}
|
|
|
|
return rule, nil
|
|
}
|
|
|
|
func ParseRule(msg json.RawMessage) (*router.RoutingRule, error) {
|
|
rawRule := new(RouterRule)
|
|
err := json.Unmarshal(msg, rawRule)
|
|
if err != nil {
|
|
return nil, errors.New("invalid router rule").Base(err)
|
|
}
|
|
if rawRule.Type == "" || strings.EqualFold(rawRule.Type, "field") {
|
|
fieldrule, err := parseFieldRule(msg)
|
|
if err != nil {
|
|
return nil, errors.New("invalid field rule").Base(err)
|
|
}
|
|
return fieldrule, nil
|
|
}
|
|
return nil, errors.New("unknown router rule type: ", rawRule.Type)
|
|
}
|