1001 lines
35 KiB
Go
1001 lines
35 KiB
Go
package main
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import (
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"encoding/json"
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"errors"
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"flag"
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"fmt"
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"math/rand"
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"net"
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"net/http"
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"net/url"
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"os"
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"path"
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"path/filepath"
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"strconv"
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"strings"
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"time"
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"github.com/BurntSushi/toml"
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"github.com/jedisct1/dlog"
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stamps "github.com/jedisct1/go-dnsstamps"
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netproxy "golang.org/x/net/proxy"
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)
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const (
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MaxTimeout = 3600
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DefaultNetprobeAddress = "9.9.9.9:53"
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)
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type Config struct {
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LogLevel int `toml:"log_level"`
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LogFile *string `toml:"log_file"`
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LogFileLatest bool `toml:"log_file_latest"`
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UseSyslog bool `toml:"use_syslog"`
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ServerNames []string `toml:"server_names"`
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DisabledServerNames []string `toml:"disabled_server_names"`
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ListenAddresses []string `toml:"listen_addresses"`
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LocalDoH LocalDoHConfig `toml:"local_doh"`
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UserName string `toml:"user_name"`
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ForceTCP bool `toml:"force_tcp"`
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HTTP3 bool `toml:"http3"`
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Timeout int `toml:"timeout"`
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KeepAlive int `toml:"keepalive"`
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Proxy string `toml:"proxy"`
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CertRefreshConcurrency int `toml:"cert_refresh_concurrency"`
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CertRefreshDelay int `toml:"cert_refresh_delay"`
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CertIgnoreTimestamp bool `toml:"cert_ignore_timestamp"`
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EphemeralKeys bool `toml:"dnscrypt_ephemeral_keys"`
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LBStrategy string `toml:"lb_strategy"`
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LBEstimator bool `toml:"lb_estimator"`
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BlockIPv6 bool `toml:"block_ipv6"`
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BlockUnqualified bool `toml:"block_unqualified"`
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BlockUndelegated bool `toml:"block_undelegated"`
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Cache bool
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CacheSize int `toml:"cache_size"`
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CacheNegTTL uint32 `toml:"cache_neg_ttl"`
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CacheNegMinTTL uint32 `toml:"cache_neg_min_ttl"`
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CacheNegMaxTTL uint32 `toml:"cache_neg_max_ttl"`
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CacheMinTTL uint32 `toml:"cache_min_ttl"`
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CacheMaxTTL uint32 `toml:"cache_max_ttl"`
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RejectTTL uint32 `toml:"reject_ttl"`
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CloakTTL uint32 `toml:"cloak_ttl"`
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QueryLog QueryLogConfig `toml:"query_log"`
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NxLog NxLogConfig `toml:"nx_log"`
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BlockName BlockNameConfig `toml:"blocked_names"`
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BlockNameLegacy BlockNameConfigLegacy `toml:"blacklist"`
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WhitelistNameLegacy WhitelistNameConfigLegacy `toml:"whitelist"`
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AllowedName AllowedNameConfig `toml:"allowed_names"`
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BlockIP BlockIPConfig `toml:"blocked_ips"`
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BlockIPLegacy BlockIPConfigLegacy `toml:"ip_blacklist"`
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AllowIP AllowIPConfig `toml:"allowed_ips"`
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ForwardFile string `toml:"forwarding_rules"`
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CloakFile string `toml:"cloaking_rules"`
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CaptivePortals CaptivePortalsConfig `toml:"captive_portals"`
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StaticsConfig map[string]StaticConfig `toml:"static"`
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SourcesConfig map[string]SourceConfig `toml:"sources"`
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BrokenImplementations BrokenImplementationsConfig `toml:"broken_implementations"`
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SourceRequireDNSSEC bool `toml:"require_dnssec"`
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SourceRequireNoLog bool `toml:"require_nolog"`
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SourceRequireNoFilter bool `toml:"require_nofilter"`
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SourceDNSCrypt bool `toml:"dnscrypt_servers"`
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SourceDoH bool `toml:"doh_servers"`
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SourceODoH bool `toml:"odoh_servers"`
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SourceIPv4 bool `toml:"ipv4_servers"`
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SourceIPv6 bool `toml:"ipv6_servers"`
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MaxClients uint32 `toml:"max_clients"`
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BootstrapResolversLegacy []string `toml:"fallback_resolvers"`
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BootstrapResolvers []string `toml:"bootstrap_resolvers"`
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IgnoreSystemDNS bool `toml:"ignore_system_dns"`
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AllWeeklyRanges map[string]WeeklyRangesStr `toml:"schedules"`
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LogMaxSize int `toml:"log_files_max_size"`
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LogMaxAge int `toml:"log_files_max_age"`
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LogMaxBackups int `toml:"log_files_max_backups"`
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TLSDisableSessionTickets bool `toml:"tls_disable_session_tickets"`
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TLSCipherSuite []uint16 `toml:"tls_cipher_suite"`
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TLSKeyLogFile string `toml:"tls_key_log_file"`
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NetprobeAddress string `toml:"netprobe_address"`
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NetprobeTimeout int `toml:"netprobe_timeout"`
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OfflineMode bool `toml:"offline_mode"`
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HTTPProxyURL string `toml:"http_proxy"`
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RefusedCodeInResponses bool `toml:"refused_code_in_responses"`
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BlockedQueryResponse string `toml:"blocked_query_response"`
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QueryMeta []string `toml:"query_meta"`
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CloakedPTR bool `toml:"cloak_ptr"`
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AnonymizedDNS AnonymizedDNSConfig `toml:"anonymized_dns"`
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DoHClientX509Auth DoHClientX509AuthConfig `toml:"doh_client_x509_auth"`
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DoHClientX509AuthLegacy DoHClientX509AuthConfig `toml:"tls_client_auth"`
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DNS64 DNS64Config `toml:"dns64"`
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EDNSClientSubnet []string `toml:"edns_client_subnet"`
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}
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func newConfig() Config {
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return Config{
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LogLevel: int(dlog.LogLevel()),
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LogFileLatest: true,
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ListenAddresses: []string{"127.0.0.1:53"},
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LocalDoH: LocalDoHConfig{Path: "/dns-query"},
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Timeout: 5000,
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KeepAlive: 5,
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CertRefreshConcurrency: 10,
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CertRefreshDelay: 240,
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HTTP3: false,
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CertIgnoreTimestamp: false,
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EphemeralKeys: false,
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Cache: true,
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CacheSize: 512,
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CacheNegTTL: 0,
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CacheNegMinTTL: 60,
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CacheNegMaxTTL: 600,
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CacheMinTTL: 60,
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CacheMaxTTL: 86400,
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RejectTTL: 600,
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CloakTTL: 600,
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SourceRequireNoLog: true,
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SourceRequireNoFilter: true,
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SourceIPv4: true,
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SourceIPv6: false,
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SourceDNSCrypt: true,
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SourceDoH: true,
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SourceODoH: false,
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MaxClients: 250,
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BootstrapResolvers: []string{DefaultBootstrapResolver},
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IgnoreSystemDNS: false,
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LogMaxSize: 10,
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LogMaxAge: 7,
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LogMaxBackups: 1,
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TLSDisableSessionTickets: false,
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TLSCipherSuite: nil,
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TLSKeyLogFile: "",
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NetprobeTimeout: 60,
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OfflineMode: false,
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RefusedCodeInResponses: false,
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LBEstimator: true,
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BlockedQueryResponse: "hinfo",
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BrokenImplementations: BrokenImplementationsConfig{
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FragmentsBlocked: []string{
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"cisco", "cisco-ipv6", "cisco-familyshield", "cisco-familyshield-ipv6",
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"cleanbrowsing-adult", "cleanbrowsing-adult-ipv6", "cleanbrowsing-family", "cleanbrowsing-family-ipv6", "cleanbrowsing-security", "cleanbrowsing-security-ipv6",
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},
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},
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AnonymizedDNS: AnonymizedDNSConfig{
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DirectCertFallback: true,
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},
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CloakedPTR: false,
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}
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}
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type StaticConfig struct {
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Stamp string
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}
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type SourceConfig struct {
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URL string
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URLs []string
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MinisignKeyStr string `toml:"minisign_key"`
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CacheFile string `toml:"cache_file"`
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FormatStr string `toml:"format"`
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RefreshDelay int `toml:"refresh_delay"`
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Prefix string
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}
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type QueryLogConfig struct {
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File string
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Format string
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IgnoredQtypes []string `toml:"ignored_qtypes"`
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}
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type NxLogConfig struct {
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File string
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Format string
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}
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type BlockNameConfig struct {
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File string `toml:"blocked_names_file"`
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LogFile string `toml:"log_file"`
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Format string `toml:"log_format"`
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}
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type BlockNameConfigLegacy struct {
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File string `toml:"blacklist_file"`
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LogFile string `toml:"log_file"`
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Format string `toml:"log_format"`
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}
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type WhitelistNameConfigLegacy struct {
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File string `toml:"whitelist_file"`
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LogFile string `toml:"log_file"`
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Format string `toml:"log_format"`
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}
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type AllowedNameConfig struct {
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File string `toml:"allowed_names_file"`
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LogFile string `toml:"log_file"`
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Format string `toml:"log_format"`
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}
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type BlockIPConfig struct {
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File string `toml:"blocked_ips_file"`
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LogFile string `toml:"log_file"`
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Format string `toml:"log_format"`
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}
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type BlockIPConfigLegacy struct {
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File string `toml:"blacklist_file"`
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LogFile string `toml:"log_file"`
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Format string `toml:"log_format"`
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}
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type AllowIPConfig struct {
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File string `toml:"allowed_ips_file"`
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LogFile string `toml:"log_file"`
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Format string `toml:"log_format"`
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}
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type AnonymizedDNSRouteConfig struct {
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ServerName string `toml:"server_name"`
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RelayNames []string `toml:"via"`
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}
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type AnonymizedDNSConfig struct {
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Routes []AnonymizedDNSRouteConfig `toml:"routes"`
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SkipIncompatible bool `toml:"skip_incompatible"`
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DirectCertFallback bool `toml:"direct_cert_fallback"`
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}
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type BrokenImplementationsConfig struct {
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BrokenQueryPadding []string `toml:"broken_query_padding"`
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FragmentsBlocked []string `toml:"fragments_blocked"`
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}
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type LocalDoHConfig struct {
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ListenAddresses []string `toml:"listen_addresses"`
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Path string `toml:"path"`
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CertFile string `toml:"cert_file"`
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CertKeyFile string `toml:"cert_key_file"`
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}
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type ServerSummary struct {
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Name string `json:"name"`
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Proto string `json:"proto"`
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IPv6 bool `json:"ipv6"`
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Addrs []string `json:"addrs,omitempty"`
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Ports []int `json:"ports"`
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DNSSEC *bool `json:"dnssec,omitempty"`
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NoLog bool `json:"nolog"`
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NoFilter bool `json:"nofilter"`
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Description string `json:"description,omitempty"`
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Stamp string `json:"stamp"`
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}
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type TLSClientAuthCredsConfig struct {
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ServerName string `toml:"server_name"`
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ClientCert string `toml:"client_cert"`
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ClientKey string `toml:"client_key"`
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RootCA string `toml:"root_ca"`
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}
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type DoHClientX509AuthConfig struct {
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Creds []TLSClientAuthCredsConfig `toml:"creds"`
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}
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type DNS64Config struct {
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Prefixes []string `toml:"prefix"`
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Resolvers []string `toml:"resolver"`
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}
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type CaptivePortalsConfig struct {
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MapFile string `toml:"map_file"`
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}
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type ConfigFlags struct {
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Resolve *string
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List *bool
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ListAll *bool
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IncludeRelays *bool
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JSONOutput *bool
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Check *bool
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ConfigFile *string
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Child *bool
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NetprobeTimeoutOverride *int
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ShowCerts *bool
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}
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func findConfigFile(configFile *string) (string, error) {
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if _, err := os.Stat(*configFile); os.IsNotExist(err) {
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cdLocal()
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if _, err := os.Stat(*configFile); err != nil {
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return "", err
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}
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}
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pwd, err := os.Getwd()
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if err != nil {
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return "", err
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}
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if filepath.IsAbs(*configFile) {
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return *configFile, nil
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}
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return path.Join(pwd, *configFile), nil
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}
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func ConfigLoad(proxy *Proxy, flags *ConfigFlags) error {
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foundConfigFile, err := findConfigFile(flags.ConfigFile)
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if err != nil {
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return fmt.Errorf(
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"Unable to load the configuration file [%s] -- Maybe use the -config command-line switch?",
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*flags.ConfigFile,
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)
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}
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WarnIfMaybeWritableByOtherUsers(foundConfigFile)
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config := newConfig()
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md, err := toml.DecodeFile(foundConfigFile, &config)
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if err != nil {
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return err
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}
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if flags.Resolve != nil && len(*flags.Resolve) > 0 {
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addr := "127.0.0.1:53"
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if len(config.ListenAddresses) > 0 {
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addr = config.ListenAddresses[0]
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}
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Resolve(addr, *flags.Resolve, len(config.ServerNames) == 1)
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os.Exit(0)
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}
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if err := cdFileDir(foundConfigFile); err != nil {
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return err
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}
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if config.LogLevel >= 0 && config.LogLevel < int(dlog.SeverityLast) {
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dlog.SetLogLevel(dlog.Severity(config.LogLevel))
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}
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if dlog.LogLevel() <= dlog.SeverityDebug && os.Getenv("DEBUG") == "" {
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dlog.SetLogLevel(dlog.SeverityInfo)
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}
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dlog.TruncateLogFile(config.LogFileLatest)
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proxy.showCerts = *flags.ShowCerts || len(os.Getenv("SHOW_CERTS")) > 0
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isCommandMode := *flags.Check || proxy.showCerts || *flags.List || *flags.ListAll
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if isCommandMode {
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} else if config.UseSyslog {
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dlog.UseSyslog(true)
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} else if config.LogFile != nil {
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dlog.UseLogFile(*config.LogFile)
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if !*flags.Child {
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FileDescriptors = append(FileDescriptors, dlog.GetFileDescriptor())
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} else {
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dlog.SetFileDescriptor(os.NewFile(uintptr(InheritedDescriptorsBase+FileDescriptorNum), "logFile"))
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FileDescriptorNum++
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}
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}
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if !*flags.Child {
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dlog.Noticef("dnscrypt-proxy %s", AppVersion)
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}
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undecoded := md.Undecoded()
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if len(undecoded) > 0 {
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return fmt.Errorf("Unsupported key in configuration file: [%s]", undecoded[0])
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}
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proxy.logMaxSize = config.LogMaxSize
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proxy.logMaxAge = config.LogMaxAge
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proxy.logMaxBackups = config.LogMaxBackups
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proxy.userName = config.UserName
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proxy.child = *flags.Child
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proxy.xTransport = NewXTransport()
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proxy.xTransport.tlsDisableSessionTickets = config.TLSDisableSessionTickets
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proxy.xTransport.tlsCipherSuite = config.TLSCipherSuite
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proxy.xTransport.mainProto = proxy.mainProto
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proxy.xTransport.http3 = config.HTTP3
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if len(config.BootstrapResolvers) == 0 && len(config.BootstrapResolversLegacy) > 0 {
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dlog.Warnf("fallback_resolvers was renamed to bootstrap_resolvers - Please update your configuration")
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config.BootstrapResolvers = config.BootstrapResolversLegacy
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}
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if len(config.BootstrapResolvers) > 0 {
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for _, resolver := range config.BootstrapResolvers {
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if err := isIPAndPort(resolver); err != nil {
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return fmt.Errorf("Bootstrap resolver [%v]: %v", resolver, err)
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}
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}
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proxy.xTransport.ignoreSystemDNS = config.IgnoreSystemDNS
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}
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proxy.xTransport.bootstrapResolvers = config.BootstrapResolvers
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proxy.xTransport.useIPv4 = config.SourceIPv4
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proxy.xTransport.useIPv6 = config.SourceIPv6
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proxy.xTransport.keepAlive = time.Duration(config.KeepAlive) * time.Second
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if len(config.HTTPProxyURL) > 0 {
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httpProxyURL, err := url.Parse(config.HTTPProxyURL)
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if err != nil {
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return fmt.Errorf("Unable to parse the HTTP proxy URL [%v]", config.HTTPProxyURL)
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}
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proxy.xTransport.httpProxyFunction = http.ProxyURL(httpProxyURL)
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}
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if len(config.Proxy) > 0 {
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proxyDialerURL, err := url.Parse(config.Proxy)
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if err != nil {
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return fmt.Errorf("Unable to parse the proxy URL [%v]", config.Proxy)
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}
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proxyDialer, err := netproxy.FromURL(proxyDialerURL, netproxy.Direct)
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if err != nil {
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return fmt.Errorf("Unable to use the proxy: [%v]", err)
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}
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proxy.xTransport.proxyDialer = &proxyDialer
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proxy.mainProto = "tcp"
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}
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proxy.xTransport.rebuildTransport()
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if md.IsDefined("refused_code_in_responses") {
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dlog.Notice("config option `refused_code_in_responses` is deprecated, use `blocked_query_response`")
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if config.RefusedCodeInResponses {
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config.BlockedQueryResponse = "refused"
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} else {
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config.BlockedQueryResponse = "hinfo"
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}
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}
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proxy.blockedQueryResponse = config.BlockedQueryResponse
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proxy.timeout = time.Duration(config.Timeout) * time.Millisecond
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proxy.maxClients = config.MaxClients
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proxy.mainProto = "udp"
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if config.ForceTCP {
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proxy.mainProto = "tcp"
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}
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proxy.certRefreshConcurrency = Max(1, config.CertRefreshConcurrency)
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proxy.certRefreshDelay = time.Duration(Max(60, config.CertRefreshDelay)) * time.Minute
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proxy.certRefreshDelayAfterFailure = time.Duration(10 * time.Second)
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proxy.certIgnoreTimestamp = config.CertIgnoreTimestamp
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proxy.ephemeralKeys = config.EphemeralKeys
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if len(config.ListenAddresses) == 0 && len(config.LocalDoH.ListenAddresses) == 0 {
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dlog.Debug("No local IP/port configured")
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}
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lbStrategy := LBStrategy(DefaultLBStrategy)
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switch lbStrategyStr := strings.ToLower(config.LBStrategy); lbStrategyStr {
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case "":
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// default
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case "p2":
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lbStrategy = LBStrategyP2{}
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case "ph":
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lbStrategy = LBStrategyPH{}
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case "fastest":
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case "first":
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lbStrategy = LBStrategyFirst{}
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case "random":
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lbStrategy = LBStrategyRandom{}
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default:
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if strings.HasPrefix(lbStrategyStr, "p") {
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n, err := strconv.ParseInt(strings.TrimPrefix(lbStrategyStr, "p"), 10, 32)
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if err != nil || n <= 0 {
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dlog.Warnf("Invalid load balancing strategy: [%s]", config.LBStrategy)
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} else {
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lbStrategy = LBStrategyPN{n: int(n)}
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}
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} else {
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dlog.Warnf("Unknown load balancing strategy: [%s]", config.LBStrategy)
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}
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}
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proxy.serversInfo.lbStrategy = lbStrategy
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proxy.serversInfo.lbEstimator = config.LBEstimator
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|
|
proxy.listenAddresses = config.ListenAddresses
|
|
proxy.localDoHListenAddresses = config.LocalDoH.ListenAddresses
|
|
if len(config.LocalDoH.Path) > 0 && config.LocalDoH.Path[0] != '/' {
|
|
return fmt.Errorf("local DoH: [%s] cannot be a valid URL path. Read the documentation", config.LocalDoH.Path)
|
|
}
|
|
proxy.localDoHPath = config.LocalDoH.Path
|
|
proxy.localDoHCertFile = config.LocalDoH.CertFile
|
|
proxy.localDoHCertKeyFile = config.LocalDoH.CertKeyFile
|
|
proxy.pluginBlockIPv6 = config.BlockIPv6
|
|
proxy.pluginBlockUnqualified = config.BlockUnqualified
|
|
proxy.pluginBlockUndelegated = config.BlockUndelegated
|
|
proxy.cache = config.Cache
|
|
proxy.cacheSize = config.CacheSize
|
|
|
|
if config.CacheNegTTL > 0 {
|
|
proxy.cacheNegMinTTL = config.CacheNegTTL
|
|
proxy.cacheNegMaxTTL = config.CacheNegTTL
|
|
} else {
|
|
proxy.cacheNegMinTTL = config.CacheNegMinTTL
|
|
proxy.cacheNegMaxTTL = config.CacheNegMaxTTL
|
|
}
|
|
|
|
proxy.cacheMinTTL = config.CacheMinTTL
|
|
proxy.cacheMaxTTL = config.CacheMaxTTL
|
|
proxy.rejectTTL = config.RejectTTL
|
|
proxy.cloakTTL = config.CloakTTL
|
|
proxy.cloakedPTR = config.CloakedPTR
|
|
|
|
proxy.queryMeta = config.QueryMeta
|
|
|
|
if len(config.EDNSClientSubnet) != 0 {
|
|
proxy.ednsClientSubnets = make([]*net.IPNet, 0)
|
|
for _, cidr := range config.EDNSClientSubnet {
|
|
_, net, err := net.ParseCIDR(cidr)
|
|
if err != nil {
|
|
return fmt.Errorf("Invalid EDNS-client-subnet CIDR: [%v]", cidr)
|
|
}
|
|
proxy.ednsClientSubnets = append(proxy.ednsClientSubnets, net)
|
|
}
|
|
}
|
|
|
|
if len(config.QueryLog.Format) == 0 {
|
|
config.QueryLog.Format = "tsv"
|
|
} else {
|
|
config.QueryLog.Format = strings.ToLower(config.QueryLog.Format)
|
|
}
|
|
if config.QueryLog.Format != "tsv" && config.QueryLog.Format != "ltsv" {
|
|
return errors.New("Unsupported query log format")
|
|
}
|
|
proxy.queryLogFile = config.QueryLog.File
|
|
proxy.queryLogFormat = config.QueryLog.Format
|
|
proxy.queryLogIgnoredQtypes = config.QueryLog.IgnoredQtypes
|
|
|
|
if len(config.NxLog.Format) == 0 {
|
|
config.NxLog.Format = "tsv"
|
|
} else {
|
|
config.NxLog.Format = strings.ToLower(config.NxLog.Format)
|
|
}
|
|
if config.NxLog.Format != "tsv" && config.NxLog.Format != "ltsv" {
|
|
return errors.New("Unsupported NX log format")
|
|
}
|
|
proxy.nxLogFile = config.NxLog.File
|
|
proxy.nxLogFormat = config.NxLog.Format
|
|
|
|
if len(config.BlockName.File) > 0 && len(config.BlockNameLegacy.File) > 0 {
|
|
return errors.New("Don't specify both [blocked_names] and [blacklist] sections - Update your config file")
|
|
}
|
|
if len(config.BlockNameLegacy.File) > 0 {
|
|
dlog.Notice("Use of [blacklist] is deprecated - Update your config file")
|
|
config.BlockName.File = config.BlockNameLegacy.File
|
|
config.BlockName.Format = config.BlockNameLegacy.Format
|
|
config.BlockName.LogFile = config.BlockNameLegacy.LogFile
|
|
}
|
|
if len(config.BlockName.Format) == 0 {
|
|
config.BlockName.Format = "tsv"
|
|
} else {
|
|
config.BlockName.Format = strings.ToLower(config.BlockName.Format)
|
|
}
|
|
if config.BlockName.Format != "tsv" && config.BlockName.Format != "ltsv" {
|
|
return errors.New("Unsupported block log format")
|
|
}
|
|
proxy.blockNameFile = config.BlockName.File
|
|
proxy.blockNameFormat = config.BlockName.Format
|
|
proxy.blockNameLogFile = config.BlockName.LogFile
|
|
|
|
if len(config.AllowedName.File) > 0 && len(config.WhitelistNameLegacy.File) > 0 {
|
|
return errors.New("Don't specify both [whitelist] and [allowed_names] sections - Update your config file")
|
|
}
|
|
if len(config.WhitelistNameLegacy.File) > 0 {
|
|
dlog.Notice("Use of [whitelist] is deprecated - Update your config file")
|
|
config.AllowedName.File = config.WhitelistNameLegacy.File
|
|
config.AllowedName.Format = config.WhitelistNameLegacy.Format
|
|
config.AllowedName.LogFile = config.WhitelistNameLegacy.LogFile
|
|
}
|
|
if len(config.AllowedName.Format) == 0 {
|
|
config.AllowedName.Format = "tsv"
|
|
} else {
|
|
config.AllowedName.Format = strings.ToLower(config.AllowedName.Format)
|
|
}
|
|
if config.AllowedName.Format != "tsv" && config.AllowedName.Format != "ltsv" {
|
|
return errors.New("Unsupported allowed_names log format")
|
|
}
|
|
proxy.allowNameFile = config.AllowedName.File
|
|
proxy.allowNameFormat = config.AllowedName.Format
|
|
proxy.allowNameLogFile = config.AllowedName.LogFile
|
|
|
|
if len(config.BlockIP.File) > 0 && len(config.BlockIPLegacy.File) > 0 {
|
|
return errors.New("Don't specify both [blocked_ips] and [ip_blacklist] sections - Update your config file")
|
|
}
|
|
if len(config.BlockIPLegacy.File) > 0 {
|
|
dlog.Notice("Use of [ip_blacklist] is deprecated - Update your config file")
|
|
config.BlockIP.File = config.BlockIPLegacy.File
|
|
config.BlockIP.Format = config.BlockIPLegacy.Format
|
|
config.BlockIP.LogFile = config.BlockIPLegacy.LogFile
|
|
}
|
|
if len(config.BlockIP.Format) == 0 {
|
|
config.BlockIP.Format = "tsv"
|
|
} else {
|
|
config.BlockIP.Format = strings.ToLower(config.BlockIP.Format)
|
|
}
|
|
if config.BlockIP.Format != "tsv" && config.BlockIP.Format != "ltsv" {
|
|
return errors.New("Unsupported IP block log format")
|
|
}
|
|
proxy.blockIPFile = config.BlockIP.File
|
|
proxy.blockIPFormat = config.BlockIP.Format
|
|
proxy.blockIPLogFile = config.BlockIP.LogFile
|
|
|
|
if len(config.AllowIP.Format) == 0 {
|
|
config.AllowIP.Format = "tsv"
|
|
} else {
|
|
config.AllowIP.Format = strings.ToLower(config.AllowIP.Format)
|
|
}
|
|
if config.AllowIP.Format != "tsv" && config.AllowIP.Format != "ltsv" {
|
|
return errors.New("Unsupported allowed_ips log format")
|
|
}
|
|
proxy.allowedIPFile = config.AllowIP.File
|
|
proxy.allowedIPFormat = config.AllowIP.Format
|
|
proxy.allowedIPLogFile = config.AllowIP.LogFile
|
|
|
|
proxy.forwardFile = config.ForwardFile
|
|
proxy.cloakFile = config.CloakFile
|
|
proxy.captivePortalMapFile = config.CaptivePortals.MapFile
|
|
|
|
allWeeklyRanges, err := ParseAllWeeklyRanges(config.AllWeeklyRanges)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
proxy.allWeeklyRanges = allWeeklyRanges
|
|
|
|
if configRoutes := config.AnonymizedDNS.Routes; configRoutes != nil {
|
|
routes := make(map[string][]string)
|
|
for _, configRoute := range configRoutes {
|
|
routes[configRoute.ServerName] = configRoute.RelayNames
|
|
}
|
|
proxy.routes = &routes
|
|
}
|
|
proxy.skipAnonIncompatibleResolvers = config.AnonymizedDNS.SkipIncompatible
|
|
proxy.anonDirectCertFallback = config.AnonymizedDNS.DirectCertFallback
|
|
|
|
if len(config.TLSKeyLogFile) > 0 {
|
|
f, err := os.OpenFile(config.TLSKeyLogFile, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0o600)
|
|
if err != nil {
|
|
dlog.Fatalf("Unable to create key log file [%s]: [%s]", config.TLSKeyLogFile, err)
|
|
}
|
|
dlog.Warnf("TLS key log file [%s] enabled", config.TLSKeyLogFile)
|
|
proxy.xTransport.keyLogWriter = f
|
|
proxy.xTransport.rebuildTransport()
|
|
}
|
|
|
|
if config.DoHClientX509AuthLegacy.Creds != nil {
|
|
return errors.New("[tls_client_auth] has been renamed to [doh_client_x509_auth] - Update your config file")
|
|
}
|
|
dohClientCreds := config.DoHClientX509Auth.Creds
|
|
if len(dohClientCreds) > 0 {
|
|
dlog.Noticef("Enabling TLS authentication")
|
|
configClientCred := dohClientCreds[0]
|
|
if len(dohClientCreds) > 1 {
|
|
dlog.Fatal("Only one tls_client_auth entry is currently supported")
|
|
}
|
|
proxy.xTransport.tlsClientCreds = DOHClientCreds{
|
|
clientCert: configClientCred.ClientCert,
|
|
clientKey: configClientCred.ClientKey,
|
|
rootCA: configClientCred.RootCA,
|
|
}
|
|
proxy.xTransport.rebuildTransport()
|
|
}
|
|
|
|
// Backwards compatibility
|
|
config.BrokenImplementations.FragmentsBlocked = append(
|
|
config.BrokenImplementations.FragmentsBlocked,
|
|
config.BrokenImplementations.BrokenQueryPadding...)
|
|
|
|
proxy.serversBlockingFragments = config.BrokenImplementations.FragmentsBlocked
|
|
|
|
proxy.dns64Prefixes = config.DNS64.Prefixes
|
|
proxy.dns64Resolvers = config.DNS64.Resolvers
|
|
|
|
if *flags.ListAll {
|
|
config.ServerNames = nil
|
|
config.DisabledServerNames = nil
|
|
config.SourceRequireDNSSEC = false
|
|
config.SourceRequireNoFilter = false
|
|
config.SourceRequireNoLog = false
|
|
config.SourceIPv4 = true
|
|
config.SourceIPv6 = true
|
|
config.SourceDNSCrypt = true
|
|
config.SourceDoH = true
|
|
config.SourceODoH = true
|
|
}
|
|
|
|
var requiredProps stamps.ServerInformalProperties
|
|
if config.SourceRequireDNSSEC {
|
|
requiredProps |= stamps.ServerInformalPropertyDNSSEC
|
|
}
|
|
if config.SourceRequireNoLog {
|
|
requiredProps |= stamps.ServerInformalPropertyNoLog
|
|
}
|
|
if config.SourceRequireNoFilter {
|
|
requiredProps |= stamps.ServerInformalPropertyNoFilter
|
|
}
|
|
proxy.requiredProps = requiredProps
|
|
proxy.ServerNames = config.ServerNames
|
|
proxy.DisabledServerNames = config.DisabledServerNames
|
|
proxy.SourceIPv4 = config.SourceIPv4
|
|
proxy.SourceIPv6 = config.SourceIPv6
|
|
proxy.SourceDNSCrypt = config.SourceDNSCrypt
|
|
proxy.SourceDoH = config.SourceDoH
|
|
proxy.SourceODoH = config.SourceODoH
|
|
|
|
netprobeTimeout := config.NetprobeTimeout
|
|
flag.Visit(func(flag *flag.Flag) {
|
|
if flag.Name == "netprobe-timeout" && flags.NetprobeTimeoutOverride != nil {
|
|
netprobeTimeout = *flags.NetprobeTimeoutOverride
|
|
}
|
|
})
|
|
netprobeAddress := DefaultNetprobeAddress
|
|
if len(config.NetprobeAddress) > 0 {
|
|
netprobeAddress = config.NetprobeAddress
|
|
} else if len(config.BootstrapResolvers) > 0 {
|
|
netprobeAddress = config.BootstrapResolvers[0]
|
|
}
|
|
if !isCommandMode {
|
|
if err := NetProbe(proxy, netprobeAddress, netprobeTimeout); err != nil {
|
|
return err
|
|
}
|
|
for _, listenAddrStr := range proxy.listenAddresses {
|
|
proxy.addDNSListener(listenAddrStr)
|
|
}
|
|
for _, listenAddrStr := range proxy.localDoHListenAddresses {
|
|
proxy.addLocalDoHListener(listenAddrStr)
|
|
}
|
|
if err := proxy.addSystemDListeners(); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
// if 'userName' is set and we are the parent process drop privilege and exit
|
|
if len(proxy.userName) > 0 && !proxy.child {
|
|
proxy.dropPrivilege(proxy.userName, FileDescriptors)
|
|
return errors.New(
|
|
"Dropping privileges is not supporting on this operating system. Unset `user_name` in the configuration file",
|
|
)
|
|
}
|
|
if !config.OfflineMode {
|
|
if err := config.loadSources(proxy); err != nil {
|
|
return err
|
|
}
|
|
if len(proxy.registeredServers) == 0 {
|
|
return errors.New("No servers configured")
|
|
}
|
|
}
|
|
if *flags.List || *flags.ListAll {
|
|
if err := config.printRegisteredServers(proxy, *flags.JSONOutput, *flags.IncludeRelays); err != nil {
|
|
return err
|
|
}
|
|
os.Exit(0)
|
|
}
|
|
if proxy.routes != nil && len(*proxy.routes) > 0 {
|
|
hasSpecificRoutes := false
|
|
for _, server := range proxy.registeredServers {
|
|
if via, ok := (*proxy.routes)[server.name]; ok {
|
|
if server.stamp.Proto != stamps.StampProtoTypeDNSCrypt &&
|
|
server.stamp.Proto != stamps.StampProtoTypeODoHTarget {
|
|
dlog.Errorf(
|
|
"DNS anonymization is only supported with the DNSCrypt and ODoH protocols - Connections to [%v] cannot be anonymized",
|
|
server.name,
|
|
)
|
|
} else {
|
|
dlog.Noticef("Anonymized DNS: routing [%v] via %v", server.name, via)
|
|
}
|
|
hasSpecificRoutes = true
|
|
}
|
|
}
|
|
if via, ok := (*proxy.routes)["*"]; ok {
|
|
if hasSpecificRoutes {
|
|
dlog.Noticef("Anonymized DNS: routing everything else via %v", via)
|
|
} else {
|
|
dlog.Noticef("Anonymized DNS: routing everything via %v", via)
|
|
}
|
|
}
|
|
}
|
|
if *flags.Check {
|
|
dlog.Notice("Configuration successfully checked")
|
|
os.Exit(0)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (config *Config) printRegisteredServers(proxy *Proxy, jsonOutput bool, includeRelays bool) error {
|
|
var summary []ServerSummary
|
|
if includeRelays {
|
|
for _, registeredRelay := range proxy.registeredRelays {
|
|
addrStr, port := registeredRelay.stamp.ServerAddrStr, stamps.DefaultPort
|
|
var hostAddr string
|
|
hostAddr, port = ExtractHostAndPort(addrStr, port)
|
|
addrs := make([]string, 0)
|
|
if (registeredRelay.stamp.Proto == stamps.StampProtoTypeDoH || registeredRelay.stamp.Proto == stamps.StampProtoTypeODoHTarget) &&
|
|
len(registeredRelay.stamp.ProviderName) > 0 {
|
|
providerName := registeredRelay.stamp.ProviderName
|
|
var host string
|
|
host, port = ExtractHostAndPort(providerName, port)
|
|
addrs = append(addrs, host)
|
|
}
|
|
if len(addrStr) > 0 {
|
|
addrs = append(addrs, hostAddr)
|
|
}
|
|
nolog := true
|
|
nofilter := true
|
|
if registeredRelay.stamp.Proto == stamps.StampProtoTypeODoHRelay {
|
|
nolog = registeredRelay.stamp.Props&stamps.ServerInformalPropertyNoLog != 0
|
|
}
|
|
serverSummary := ServerSummary{
|
|
Name: registeredRelay.name,
|
|
Proto: registeredRelay.stamp.Proto.String(),
|
|
IPv6: strings.HasPrefix(addrStr, "["),
|
|
Ports: []int{port},
|
|
Addrs: addrs,
|
|
NoLog: nolog,
|
|
NoFilter: nofilter,
|
|
Description: registeredRelay.description,
|
|
Stamp: registeredRelay.stamp.String(),
|
|
}
|
|
if jsonOutput {
|
|
summary = append(summary, serverSummary)
|
|
} else {
|
|
fmt.Println(serverSummary.Name)
|
|
}
|
|
}
|
|
}
|
|
for _, registeredServer := range proxy.registeredServers {
|
|
addrStr, port := registeredServer.stamp.ServerAddrStr, stamps.DefaultPort
|
|
var hostAddr string
|
|
hostAddr, port = ExtractHostAndPort(addrStr, port)
|
|
addrs := make([]string, 0)
|
|
if (registeredServer.stamp.Proto == stamps.StampProtoTypeDoH || registeredServer.stamp.Proto == stamps.StampProtoTypeODoHTarget) &&
|
|
len(registeredServer.stamp.ProviderName) > 0 {
|
|
providerName := registeredServer.stamp.ProviderName
|
|
var host string
|
|
host, port = ExtractHostAndPort(providerName, port)
|
|
addrs = append(addrs, host)
|
|
}
|
|
if len(addrStr) > 0 {
|
|
addrs = append(addrs, hostAddr)
|
|
}
|
|
dnssec := registeredServer.stamp.Props&stamps.ServerInformalPropertyDNSSEC != 0
|
|
serverSummary := ServerSummary{
|
|
Name: registeredServer.name,
|
|
Proto: registeredServer.stamp.Proto.String(),
|
|
IPv6: strings.HasPrefix(addrStr, "["),
|
|
Ports: []int{port},
|
|
Addrs: addrs,
|
|
DNSSEC: &dnssec,
|
|
NoLog: registeredServer.stamp.Props&stamps.ServerInformalPropertyNoLog != 0,
|
|
NoFilter: registeredServer.stamp.Props&stamps.ServerInformalPropertyNoFilter != 0,
|
|
Description: registeredServer.description,
|
|
Stamp: registeredServer.stamp.String(),
|
|
}
|
|
if jsonOutput {
|
|
summary = append(summary, serverSummary)
|
|
} else {
|
|
fmt.Println(serverSummary.Name)
|
|
}
|
|
}
|
|
if jsonOutput {
|
|
jsonStr, err := json.MarshalIndent(summary, "", " ")
|
|
if err != nil {
|
|
return err
|
|
}
|
|
fmt.Print(string(jsonStr))
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (config *Config) loadSources(proxy *Proxy) error {
|
|
for cfgSourceName, cfgSource_ := range config.SourcesConfig {
|
|
cfgSource := cfgSource_
|
|
rand.Shuffle(len(cfgSource.URLs), func(i, j int) {
|
|
cfgSource.URLs[i], cfgSource.URLs[j] = cfgSource.URLs[j], cfgSource.URLs[i]
|
|
})
|
|
if err := config.loadSource(proxy, cfgSourceName, &cfgSource); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
for name, config := range config.StaticsConfig {
|
|
if stamp, err := stamps.NewServerStampFromString(config.Stamp); err == nil {
|
|
if stamp.Proto == stamps.StampProtoTypeDNSCryptRelay || stamp.Proto == stamps.StampProtoTypeODoHRelay {
|
|
dlog.Debugf("Adding [%s] to the set of available static relays", name)
|
|
registeredServer := RegisteredServer{name: name, stamp: stamp, description: "static relay"}
|
|
proxy.registeredRelays = append(proxy.registeredRelays, registeredServer)
|
|
}
|
|
}
|
|
}
|
|
if len(config.ServerNames) == 0 {
|
|
for serverName := range config.StaticsConfig {
|
|
config.ServerNames = append(config.ServerNames, serverName)
|
|
}
|
|
}
|
|
for _, serverName := range config.ServerNames {
|
|
staticConfig, ok := config.StaticsConfig[serverName]
|
|
if !ok {
|
|
continue
|
|
}
|
|
if len(staticConfig.Stamp) == 0 {
|
|
return fmt.Errorf("Missing stamp for the static [%s] definition", serverName)
|
|
}
|
|
stamp, err := stamps.NewServerStampFromString(staticConfig.Stamp)
|
|
if err != nil {
|
|
return fmt.Errorf("Stamp error for the static [%s] definition: [%v]", serverName, err)
|
|
}
|
|
proxy.registeredServers = append(proxy.registeredServers, RegisteredServer{name: serverName, stamp: stamp})
|
|
}
|
|
if err := proxy.updateRegisteredServers(); err != nil {
|
|
return err
|
|
}
|
|
rs1 := proxy.registeredServers
|
|
rs2 := proxy.serversInfo.registeredServers
|
|
rand.Shuffle(len(rs1), func(i, j int) {
|
|
rs1[i], rs1[j] = rs1[j], rs1[i]
|
|
})
|
|
rand.Shuffle(len(rs2), func(i, j int) {
|
|
rs2[i], rs2[j] = rs2[j], rs2[i]
|
|
})
|
|
return nil
|
|
}
|
|
|
|
func (config *Config) loadSource(proxy *Proxy, cfgSourceName string, cfgSource *SourceConfig) error {
|
|
if len(cfgSource.URLs) == 0 {
|
|
if len(cfgSource.URL) == 0 {
|
|
dlog.Debugf("Missing URLs for source [%s]", cfgSourceName)
|
|
} else {
|
|
cfgSource.URLs = []string{cfgSource.URL}
|
|
}
|
|
}
|
|
if cfgSource.MinisignKeyStr == "" {
|
|
return fmt.Errorf("Missing Minisign key for source [%s]", cfgSourceName)
|
|
}
|
|
if cfgSource.CacheFile == "" {
|
|
return fmt.Errorf("Missing cache file for source [%s]", cfgSourceName)
|
|
}
|
|
if cfgSource.FormatStr == "" {
|
|
cfgSource.FormatStr = "v2"
|
|
}
|
|
if cfgSource.RefreshDelay <= 0 {
|
|
cfgSource.RefreshDelay = 72
|
|
}
|
|
cfgSource.RefreshDelay = Min(168, Max(24, cfgSource.RefreshDelay))
|
|
source, err := NewSource(
|
|
cfgSourceName,
|
|
proxy.xTransport,
|
|
cfgSource.URLs,
|
|
cfgSource.MinisignKeyStr,
|
|
cfgSource.CacheFile,
|
|
cfgSource.FormatStr,
|
|
time.Duration(cfgSource.RefreshDelay)*time.Hour,
|
|
cfgSource.Prefix,
|
|
)
|
|
if err != nil {
|
|
if len(source.bin) <= 0 {
|
|
dlog.Criticalf("Unable to retrieve source [%s]: [%s]", cfgSourceName, err)
|
|
return err
|
|
}
|
|
dlog.Infof("Downloading [%s] failed: %v, using cache file to startup", source.name, err)
|
|
}
|
|
proxy.sources = append(proxy.sources, source)
|
|
return nil
|
|
}
|
|
|
|
func includesName(names []string, name string) bool {
|
|
for _, found := range names {
|
|
if strings.EqualFold(found, name) {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
func cdFileDir(fileName string) error {
|
|
return os.Chdir(filepath.Dir(fileName))
|
|
}
|
|
|
|
func cdLocal() {
|
|
exeFileName, err := os.Executable()
|
|
if err != nil {
|
|
dlog.Warnf(
|
|
"Unable to determine the executable directory: [%s] -- You will need to specify absolute paths in the configuration file",
|
|
err,
|
|
)
|
|
} else if err := os.Chdir(filepath.Dir(exeFileName)); err != nil {
|
|
dlog.Warnf("Unable to change working directory to [%s]: %s", exeFileName, err)
|
|
}
|
|
}
|
|
|
|
func isIPAndPort(addrStr string) error {
|
|
host, port := ExtractHostAndPort(addrStr, -1)
|
|
if ip := ParseIP(host); ip == nil {
|
|
return fmt.Errorf("Host does not parse as IP '%s'", addrStr)
|
|
} else if port == -1 {
|
|
return fmt.Errorf("Port missing '%s'", addrStr)
|
|
} else if _, err := strconv.ParseUint(strconv.Itoa(port), 10, 16); err != nil {
|
|
return fmt.Errorf("Port does not parse '%s' [%v]", addrStr, err)
|
|
}
|
|
return nil
|
|
}
|