mirror of
https://github.com/XTLS/Xray-core.git
synced 2024-12-23 22:19:49 +00:00
698 lines
17 KiB
Go
698 lines
17 KiB
Go
package conf
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import (
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"encoding/json"
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"runtime"
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"strconv"
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"strings"
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"github.com/xtls/xray-core/app/router"
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"github.com/xtls/xray-core/common/net"
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"github.com/xtls/xray-core/common/platform/filesystem"
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"google.golang.org/protobuf/proto"
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)
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type RouterRulesConfig struct {
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RuleList []json.RawMessage `json:"rules"`
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DomainStrategy string `json:"domainStrategy"`
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}
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// StrategyConfig represents a strategy config
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type StrategyConfig struct {
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Type string `json:"type"`
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Settings *json.RawMessage `json:"settings"`
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}
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type BalancingRule struct {
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Tag string `json:"tag"`
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Selectors StringList `json:"selector"`
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Strategy StrategyConfig `json:"strategy"`
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}
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func (r *BalancingRule) Build() (*router.BalancingRule, error) {
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if r.Tag == "" {
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return nil, newError("empty balancer tag")
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}
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if len(r.Selectors) == 0 {
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return nil, newError("empty selector list")
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}
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var strategy string
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switch strings.ToLower(r.Strategy.Type) {
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case strategyRandom, "":
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strategy = strategyRandom
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case strategyLeastPing:
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strategy = "leastPing"
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default:
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return nil, newError("unknown balancing strategy: " + r.Strategy.Type)
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}
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return &router.BalancingRule{
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Tag: r.Tag,
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OutboundSelector: []string(r.Selectors),
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Strategy: strategy,
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}, nil
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}
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type RouterConfig struct {
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Settings *RouterRulesConfig `json:"settings"` // Deprecated
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RuleList []json.RawMessage `json:"rules"`
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DomainStrategy *string `json:"domainStrategy"`
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Balancers []*BalancingRule `json:"balancers"`
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DomainMatcher string `json:"domainMatcher"`
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}
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func (c *RouterConfig) getDomainStrategy() router.Config_DomainStrategy {
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ds := ""
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if c.DomainStrategy != nil {
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ds = *c.DomainStrategy
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} else if c.Settings != nil {
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ds = c.Settings.DomainStrategy
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}
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switch strings.ToLower(ds) {
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case "alwaysip":
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return router.Config_UseIp
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case "ipifnonmatch":
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return router.Config_IpIfNonMatch
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case "ipondemand":
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return router.Config_IpOnDemand
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default:
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return router.Config_AsIs
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}
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}
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func (c *RouterConfig) Build() (*router.Config, error) {
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config := new(router.Config)
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config.DomainStrategy = c.getDomainStrategy()
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var rawRuleList []json.RawMessage
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if c != nil {
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rawRuleList = c.RuleList
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if c.Settings != nil {
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c.RuleList = append(c.RuleList, c.Settings.RuleList...)
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rawRuleList = c.RuleList
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}
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}
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for _, rawRule := range rawRuleList {
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rule, err := ParseRule(rawRule)
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if err != nil {
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return nil, err
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}
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if rule.DomainMatcher == "" {
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rule.DomainMatcher = c.DomainMatcher
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}
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config.Rule = append(config.Rule, rule)
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}
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for _, rawBalancer := range c.Balancers {
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balancer, err := rawBalancer.Build()
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if err != nil {
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return nil, err
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}
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config.BalancingRule = append(config.BalancingRule, balancer)
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}
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return config, nil
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}
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type RouterRule struct {
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Type string `json:"type"`
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OutboundTag string `json:"outboundTag"`
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BalancerTag string `json:"balancerTag"`
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DomainMatcher string `json:"domainMatcher"`
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}
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func ParseIP(s string) (*router.CIDR, error) {
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var addr, mask string
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i := strings.Index(s, "/")
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if i < 0 {
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addr = s
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} else {
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addr = s[:i]
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mask = s[i+1:]
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}
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ip := net.ParseAddress(addr)
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switch ip.Family() {
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case net.AddressFamilyIPv4:
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bits := uint32(32)
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if len(mask) > 0 {
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bits64, err := strconv.ParseUint(mask, 10, 32)
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if err != nil {
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return nil, newError("invalid network mask for router: ", mask).Base(err)
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}
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bits = uint32(bits64)
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}
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if bits > 32 {
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return nil, newError("invalid network mask for router: ", bits)
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}
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return &router.CIDR{
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Ip: []byte(ip.IP()),
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Prefix: bits,
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}, nil
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case net.AddressFamilyIPv6:
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bits := uint32(128)
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if len(mask) > 0 {
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bits64, err := strconv.ParseUint(mask, 10, 32)
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if err != nil {
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return nil, newError("invalid network mask for router: ", mask).Base(err)
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}
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bits = uint32(bits64)
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}
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if bits > 128 {
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return nil, newError("invalid network mask for router: ", bits)
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}
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return &router.CIDR{
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Ip: []byte(ip.IP()),
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Prefix: bits,
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}, nil
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default:
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return nil, newError("unsupported address for router: ", s)
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}
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}
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func loadGeoIP(code string) ([]*router.CIDR, error) {
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return loadIP("geoip.dat", code)
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}
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var (
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FileCache = make(map[string][]byte)
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IPCache = make(map[string]*router.GeoIP)
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SiteCache = make(map[string]*router.GeoSite)
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)
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func loadFile(file string) ([]byte, error) {
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if FileCache[file] == nil {
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bs, err := filesystem.ReadAsset(file)
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if err != nil {
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return nil, newError("failed to open file: ", file).Base(err)
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}
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if len(bs) == 0 {
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return nil, newError("empty file: ", file)
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}
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// Do not cache file, may save RAM when there
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// are many files, but consume CPU each time.
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return bs, nil
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FileCache[file] = bs
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}
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return FileCache[file], nil
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}
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func loadIP(file, code string) ([]*router.CIDR, error) {
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index := file + ":" + code
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if IPCache[index] == nil {
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bs, err := loadFile(file)
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if err != nil {
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return nil, newError("failed to load file: ", file).Base(err)
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}
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bs = find(bs, []byte(code))
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if bs == nil {
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return nil, newError("code not found in ", file, ": ", code)
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}
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var geoip router.GeoIP
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if err := proto.Unmarshal(bs, &geoip); err != nil {
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return nil, newError("error unmarshal IP in ", file, ": ", code).Base(err)
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}
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defer runtime.GC() // or debug.FreeOSMemory()
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return geoip.Cidr, nil // do not cache geoip
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IPCache[index] = &geoip
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}
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return IPCache[index].Cidr, nil
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}
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func loadSite(file, code string) ([]*router.Domain, error) {
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index := file + ":" + code
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if SiteCache[index] == nil {
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bs, err := loadFile(file)
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if err != nil {
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return nil, newError("failed to load file: ", file).Base(err)
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}
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bs = find(bs, []byte(code))
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if bs == nil {
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return nil, newError("list not found in ", file, ": ", code)
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}
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var geosite router.GeoSite
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if err := proto.Unmarshal(bs, &geosite); err != nil {
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return nil, newError("error unmarshal Site in ", file, ": ", code).Base(err)
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}
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defer runtime.GC() // or debug.FreeOSMemory()
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return geosite.Domain, nil // do not cache geosite
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SiteCache[index] = &geosite
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}
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return SiteCache[index].Domain, nil
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}
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func DecodeVarint(buf []byte) (x uint64, n int) {
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for shift := uint(0); shift < 64; shift += 7 {
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if n >= len(buf) {
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return 0, 0
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}
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b := uint64(buf[n])
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n++
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x |= (b & 0x7F) << shift
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if (b & 0x80) == 0 {
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return x, n
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}
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}
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// The number is too large to represent in a 64-bit value.
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return 0, 0
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}
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func find(data, code []byte) []byte {
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codeL := len(code)
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if codeL == 0 {
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return nil
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}
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for {
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dataL := len(data)
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if dataL < 2 {
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return nil
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}
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x, y := DecodeVarint(data[1:])
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if x == 0 && y == 0 {
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return nil
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}
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headL, bodyL := 1+y, int(x)
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dataL -= headL
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if dataL < bodyL {
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return nil
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}
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data = data[headL:]
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if int(data[1]) == codeL {
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for i := 0; i < codeL && data[2+i] == code[i]; i++ {
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if i+1 == codeL {
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return data[:bodyL]
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}
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}
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}
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if dataL == bodyL {
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return nil
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}
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data = data[bodyL:]
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}
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}
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type AttributeMatcher interface {
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Match(*router.Domain) bool
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}
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type BooleanMatcher string
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func (m BooleanMatcher) Match(domain *router.Domain) bool {
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for _, attr := range domain.Attribute {
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if attr.Key == string(m) {
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return true
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}
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}
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return false
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}
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type AttributeList struct {
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matcher []AttributeMatcher
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}
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func (al *AttributeList) Match(domain *router.Domain) bool {
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for _, matcher := range al.matcher {
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if !matcher.Match(domain) {
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return false
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}
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}
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return true
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}
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func (al *AttributeList) IsEmpty() bool {
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return len(al.matcher) == 0
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}
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func parseAttrs(attrs []string) *AttributeList {
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al := new(AttributeList)
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for _, attr := range attrs {
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lc := strings.ToLower(attr)
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al.matcher = append(al.matcher, BooleanMatcher(lc))
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}
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return al
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}
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func loadGeositeWithAttr(file string, siteWithAttr string) ([]*router.Domain, error) {
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parts := strings.Split(siteWithAttr, "@")
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if len(parts) == 0 {
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return nil, newError("empty site")
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}
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country := strings.ToUpper(parts[0])
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attrs := parseAttrs(parts[1:])
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domains, err := loadSite(file, country)
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if err != nil {
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return nil, err
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}
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if attrs.IsEmpty() {
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return domains, nil
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}
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filteredDomains := make([]*router.Domain, 0, len(domains))
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for _, domain := range domains {
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if attrs.Match(domain) {
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filteredDomains = append(filteredDomains, domain)
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}
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}
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return filteredDomains, nil
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}
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func parseDomainRule(domain string) ([]*router.Domain, error) {
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if strings.HasPrefix(domain, "geosite:") {
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country := strings.ToUpper(domain[8:])
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domains, err := loadGeositeWithAttr("geosite.dat", country)
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if err != nil {
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return nil, newError("failed to load geosite: ", country).Base(err)
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}
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return domains, nil
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}
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isExtDatFile := 0
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{
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const prefix = "ext:"
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if strings.HasPrefix(domain, prefix) {
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isExtDatFile = len(prefix)
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}
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const prefixQualified = "ext-domain:"
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if strings.HasPrefix(domain, prefixQualified) {
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isExtDatFile = len(prefixQualified)
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}
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}
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if isExtDatFile != 0 {
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kv := strings.Split(domain[isExtDatFile:], ":")
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if len(kv) != 2 {
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return nil, newError("invalid external resource: ", domain)
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}
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filename := kv[0]
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country := kv[1]
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domains, err := loadGeositeWithAttr(filename, country)
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if err != nil {
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return nil, newError("failed to load external sites: ", country, " from ", filename).Base(err)
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}
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return domains, nil
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}
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domainRule := new(router.Domain)
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switch {
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case strings.HasPrefix(domain, "regexp:"):
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domainRule.Type = router.Domain_Regex
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domainRule.Value = domain[7:]
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case strings.HasPrefix(domain, "domain:"):
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domainRule.Type = router.Domain_Domain
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domainRule.Value = domain[7:]
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case strings.HasPrefix(domain, "full:"):
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domainRule.Type = router.Domain_Full
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domainRule.Value = domain[5:]
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case strings.HasPrefix(domain, "keyword:"):
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domainRule.Type = router.Domain_Plain
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domainRule.Value = domain[8:]
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case strings.HasPrefix(domain, "dotless:"):
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domainRule.Type = router.Domain_Regex
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switch substr := domain[8:]; {
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case substr == "":
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domainRule.Value = "^[^.]*$"
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case !strings.Contains(substr, "."):
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domainRule.Value = "^[^.]*" + substr + "[^.]*$"
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default:
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return nil, newError("substr in dotless rule should not contain a dot: ", substr)
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}
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default:
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domainRule.Type = router.Domain_Plain
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domainRule.Value = domain
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}
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return []*router.Domain{domainRule}, nil
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}
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func ToCidrList(ips StringList) ([]*router.GeoIP, error) {
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var geoipList []*router.GeoIP
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var customCidrs []*router.CIDR
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for _, ip := range ips {
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if strings.HasPrefix(ip, "geoip:") {
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country := ip[6:]
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isReverseMatch := false
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if strings.HasPrefix(ip, "geoip:!") {
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country = ip[7:]
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isReverseMatch = true
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}
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if len(country) == 0 {
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return nil, newError("empty country name in rule")
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}
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geoip, err := loadGeoIP(strings.ToUpper(country))
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if err != nil {
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return nil, newError("failed to load GeoIP: ", country).Base(err)
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}
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geoipList = append(geoipList, &router.GeoIP{
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CountryCode: strings.ToUpper(country),
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Cidr: geoip,
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ReverseMatch: isReverseMatch,
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})
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continue
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}
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isExtDatFile := 0
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{
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const prefix = "ext:"
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if strings.HasPrefix(ip, prefix) {
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isExtDatFile = len(prefix)
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}
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const prefixQualified = "ext-ip:"
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if strings.HasPrefix(ip, prefixQualified) {
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isExtDatFile = len(prefixQualified)
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}
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}
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if isExtDatFile != 0 {
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kv := strings.Split(ip[isExtDatFile:], ":")
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if len(kv) != 2 {
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return nil, newError("invalid external resource: ", ip)
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}
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filename := kv[0]
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country := kv[1]
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if len(filename) == 0 || len(country) == 0 {
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return nil, newError("empty filename or empty country in rule")
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}
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isReverseMatch := false
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if strings.HasPrefix(country, "!") {
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country = country[1:]
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isReverseMatch = true
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}
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geoip, err := loadIP(filename, strings.ToUpper(country))
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if err != nil {
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return nil, newError("failed to load IPs: ", country, " from ", filename).Base(err)
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}
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geoipList = append(geoipList, &router.GeoIP{
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CountryCode: strings.ToUpper(filename + "_" + country),
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Cidr: geoip,
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ReverseMatch: isReverseMatch,
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})
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continue
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}
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ipRule, err := ParseIP(ip)
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if err != nil {
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return nil, newError("invalid IP: ", ip).Base(err)
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}
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customCidrs = append(customCidrs, ipRule)
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}
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if len(customCidrs) > 0 {
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geoipList = append(geoipList, &router.GeoIP{
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Cidr: customCidrs,
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})
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}
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return geoipList, nil
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}
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func parseFieldRule(msg json.RawMessage) (*router.RoutingRule, error) {
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type RawFieldRule struct {
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RouterRule
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Domain *StringList `json:"domain"`
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Domains *StringList `json:"domains"`
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IP *StringList `json:"ip"`
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Port *PortList `json:"port"`
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Network *NetworkList `json:"network"`
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SourceIP *StringList `json:"source"`
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SourcePort *PortList `json:"sourcePort"`
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User *StringList `json:"user"`
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InboundTag *StringList `json:"inboundTag"`
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Protocols *StringList `json:"protocol"`
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Attributes map[string]string `json:"attrs"`
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}
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rawFieldRule := new(RawFieldRule)
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err := json.Unmarshal(msg, rawFieldRule)
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if err != nil {
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return nil, err
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}
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rule := new(router.RoutingRule)
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switch {
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case len(rawFieldRule.OutboundTag) > 0:
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rule.TargetTag = &router.RoutingRule_Tag{
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Tag: rawFieldRule.OutboundTag,
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}
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case len(rawFieldRule.BalancerTag) > 0:
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rule.TargetTag = &router.RoutingRule_BalancingTag{
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BalancingTag: rawFieldRule.BalancerTag,
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}
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default:
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return nil, newError("neither outboundTag nor balancerTag is specified in routing rule")
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}
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if rawFieldRule.DomainMatcher != "" {
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rule.DomainMatcher = rawFieldRule.DomainMatcher
|
|
}
|
|
|
|
if rawFieldRule.Domain != nil {
|
|
for _, domain := range *rawFieldRule.Domain {
|
|
rules, err := parseDomainRule(domain)
|
|
if err != nil {
|
|
return nil, newError("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, newError("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, newError("invalid router rule").Base(err)
|
|
}
|
|
if strings.EqualFold(rawRule.Type, "field") {
|
|
fieldrule, err := parseFieldRule(msg)
|
|
if err != nil {
|
|
return nil, newError("invalid field rule").Base(err)
|
|
}
|
|
return fieldrule, nil
|
|
}
|
|
if strings.EqualFold(rawRule.Type, "chinaip") {
|
|
chinaiprule, err := parseChinaIPRule(msg)
|
|
if err != nil {
|
|
return nil, newError("invalid chinaip rule").Base(err)
|
|
}
|
|
return chinaiprule, nil
|
|
}
|
|
if strings.EqualFold(rawRule.Type, "chinasites") {
|
|
chinasitesrule, err := parseChinaSitesRule(msg)
|
|
if err != nil {
|
|
return nil, newError("invalid chinasites rule").Base(err)
|
|
}
|
|
return chinasitesrule, nil
|
|
}
|
|
return nil, newError("unknown router rule type: ", rawRule.Type)
|
|
}
|
|
|
|
func parseChinaIPRule(data []byte) (*router.RoutingRule, error) {
|
|
rawRule := new(RouterRule)
|
|
err := json.Unmarshal(data, rawRule)
|
|
if err != nil {
|
|
return nil, newError("invalid router rule").Base(err)
|
|
}
|
|
chinaIPs, err := loadGeoIP("CN")
|
|
if err != nil {
|
|
return nil, newError("failed to load geoip:cn").Base(err)
|
|
}
|
|
return &router.RoutingRule{
|
|
TargetTag: &router.RoutingRule_Tag{
|
|
Tag: rawRule.OutboundTag,
|
|
},
|
|
Cidr: chinaIPs,
|
|
}, nil
|
|
}
|
|
|
|
func parseChinaSitesRule(data []byte) (*router.RoutingRule, error) {
|
|
rawRule := new(RouterRule)
|
|
err := json.Unmarshal(data, rawRule)
|
|
if err != nil {
|
|
return nil, newError("invalid router rule").Base(err).AtError()
|
|
}
|
|
domains, err := loadGeositeWithAttr("geosite.dat", "CN")
|
|
if err != nil {
|
|
return nil, newError("failed to load geosite:cn.").Base(err)
|
|
}
|
|
return &router.RoutingRule{
|
|
TargetTag: &router.RoutingRule_Tag{
|
|
Tag: rawRule.OutboundTag,
|
|
},
|
|
Domain: domains,
|
|
}, nil
|
|
}
|