| 1 | package portal |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "crypto/tls" |
| 6 | "errors" |
| 7 | "fmt" |
| 8 | "io" |
| 9 | "net" |
| 10 | "net/http" |
| 11 | "net/url" |
| 12 | "strings" |
| 13 | "time" |
| 14 | |
| 15 | "github.com/rs/zerolog/log" |
| 16 | |
| 17 | "github.com/gosuda/portal-tunnel/v2/portal/auth" |
| 18 | "github.com/gosuda/portal-tunnel/v2/portal/identity" |
| 19 | "github.com/gosuda/portal-tunnel/v2/portal/keyless" |
| 20 | "github.com/gosuda/portal-tunnel/v2/portal/x402" |
| 21 | "github.com/gosuda/portal-tunnel/v2/types" |
| 22 | "github.com/gosuda/portal-tunnel/v2/utils" |
| 23 | ) |
| 24 | |
| 25 | type apiError struct { |
| 26 | code string |
| 27 | msg string |
| 28 | status int |
| 29 | } |
| 30 | |
| 31 | func (e *apiError) Error() string { return e.msg } |
| 32 | |
| 33 | var ( |
| 34 | errFeatureUnavailable = &apiError{types.APIErrorCodeFeatureUnavailable, "feature unavailable", http.StatusServiceUnavailable} |
| 35 | errHostnameConflict = &apiError{types.APIErrorCodeHostnameConflict, "hostname conflict", http.StatusConflict} |
| 36 | errIPBanned = &apiError{types.APIErrorCodeIPBanned, "request denied because source IP is banned", http.StatusForbidden} |
| 37 | errLeaseNotFound = &apiError{types.APIErrorCodeLeaseNotFound, "lease not found", http.StatusNotFound} |
| 38 | errLeaseRejected = &apiError{types.APIErrorCodeLeaseRejected, "lease is not approved for routing", http.StatusForbidden} |
| 39 | errTransportMismatch = &apiError{types.APIErrorCodeTransportMismatch, "transport mismatch", http.StatusConflict} |
| 40 | errUnauthorized = &apiError{types.APIErrorCodeUnauthorized, "unauthorized", http.StatusForbidden} |
| 41 | errUDPDisabled = &apiError{types.APIErrorCodeUDPDisabled, "udp disabled", http.StatusForbidden} |
| 42 | errUDPCapacityExceeded = &apiError{types.APIErrorCodeUDPCapacityExceeded, "udp capacity exceeded", http.StatusServiceUnavailable} |
| 43 | errUDPPortExhausted = &apiError{types.APIErrorCodeUDPPortExhausted, "no udp ports available", http.StatusServiceUnavailable} |
| 44 | errTCPPortDisabled = &apiError{types.APIErrorCodeTCPPortDisabled, "tcp port disabled", http.StatusForbidden} |
| 45 | errTCPPortCapacityExceeded = &apiError{types.APIErrorCodeTCPPortCapacityExceeded, "tcp port capacity exceeded", http.StatusServiceUnavailable} |
| 46 | errTCPPortExhausted = &apiError{types.APIErrorCodeTCPPortExhausted, "no tcp ports available", http.StatusServiceUnavailable} |
| 47 | errRegisterChallengePending = &apiError{types.APIErrorCodeRateLimited, "too many pending register challenges", http.StatusTooManyRequests} |
| 48 | ) |
| 49 | |
| 50 | func writeAPIErrorResponse(w http.ResponseWriter, err error) { |
| 51 | var ae *apiError |
| 52 | if errors.As(err, &ae) { |
| 53 | utils.WriteAPIError(w, ae.status, ae.code, ae.msg) |
| 54 | return |
| 55 | } |
| 56 | utils.InvalidRequestError(err).Write(w) |
| 57 | } |
| 58 | |
| 59 | func (s *Server) newAPIServer(listener net.Listener, apiMux *http.ServeMux, apiTLS keyless.TLSMaterialConfig) (net.Listener, *http.Server, io.Closer, error) { |
| 60 | var keylessSignerHandler http.Handler |
| 61 | if len(apiTLS.KeyPEM) > 0 { |
| 62 | signer, err := keyless.NewSigner(apiTLS.KeyPEM) |
| 63 | if err != nil { |
| 64 | return nil, nil, nil, fmt.Errorf("configure api signer: %w", err) |
| 65 | } |
| 66 | keylessSignerHandler = signer.Handler() |
| 67 | } |
| 68 | |
| 69 | apiServer := &http.Server{ |
| 70 | Handler: s.apiHandler(apiMux, keylessSignerHandler), |
| 71 | ReadHeaderTimeout: 10 * time.Second, |
| 72 | TLSNextProto: make(map[string]func(*http.Server, *tls.Conn, http.Handler)), |
| 73 | } |
| 74 | |
| 75 | apiCloser, err := keyless.AttachToHTTPServer(apiServer, apiTLS) |
| 76 | if err != nil { |
| 77 | return nil, nil, nil, fmt.Errorf("configure api tls: %w", err) |
| 78 | } |
| 79 | |
| 80 | return tls.NewListener(listener, apiServer.TLSConfig), apiServer, apiCloser, nil |
| 81 | } |
| 82 | |
| 83 | func (s *Server) apiHandler(base *http.ServeMux, keylessSignerHandler http.Handler) http.Handler { |
| 84 | if base == nil { |
| 85 | base = http.NewServeMux() |
| 86 | base.HandleFunc("/{$}", s.handleRoot) |
| 87 | } |
| 88 | |
| 89 | return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { |
| 90 | if utils.HandleAPICORS(w, r) { |
| 91 | return |
| 92 | } |
| 93 | switch strings.TrimSpace(r.URL.Path) { |
| 94 | case types.PathHealthz: |
| 95 | s.handleHealthz(w, r) |
| 96 | case types.PathSDKDomain: |
| 97 | s.handleDomain(w, r) |
| 98 | case types.PathSDKRegisterChallenge: |
| 99 | s.handleRegisterChallenge(w, r) |
| 100 | case types.PathSDKRegister: |
| 101 | s.handleRegister(w, r) |
| 102 | case types.PathSDKRenew: |
| 103 | s.handleRenew(w, r) |
| 104 | case types.PathSDKUnregister: |
| 105 | s.handleUnregister(w, r) |
| 106 | case types.PathSDKHop: |
| 107 | s.handleHop(w, r) |
| 108 | case types.PathSDKConnect: |
| 109 | s.handleConnect(w, r) |
| 110 | case types.PathDiscovery: |
| 111 | if !s.config().DiscoveryEnabled { |
| 112 | base.ServeHTTP(w, r) |
| 113 | return |
| 114 | } |
| 115 | s.handleRelayDiscovery(w, r) |
| 116 | case types.PathDiscoveryAnnounce: |
| 117 | if !s.config().DiscoveryEnabled { |
| 118 | base.ServeHTTP(w, r) |
| 119 | return |
| 120 | } |
| 121 | s.handleRelayDiscoveryAnnounce(w, r) |
| 122 | case types.PathV1Sign: |
| 123 | if keylessSignerHandler == nil { |
| 124 | http.NotFound(w, r) |
| 125 | return |
| 126 | } |
| 127 | if err := s.registry.verifySigningAccessToken(r.Header.Get(types.HeaderAccessToken)); err != nil { |
| 128 | writeAPIErrorResponse(w, err) |
| 129 | return |
| 130 | } |
| 131 | keylessSignerHandler.ServeHTTP(w, r) |
| 132 | default: |
| 133 | base.ServeHTTP(w, r) |
| 134 | } |
| 135 | }) |
| 136 | } |
| 137 | |
| 138 | func (s *Server) handleRoot(w http.ResponseWriter, _ *http.Request) { |
| 139 | utils.WriteAPIData(w, http.StatusOK, map[string]any{ |
| 140 | "service": "portal-relay", |
| 141 | "root": s.identity.Name, |
| 142 | }) |
| 143 | } |
| 144 | |
| 145 | func (s *Server) handleHealthz(w http.ResponseWriter, _ *http.Request) { |
| 146 | utils.WriteAPIData(w, http.StatusOK, map[string]any{"status": "ok"}) |
| 147 | } |
| 148 | |
| 149 | func (s *Server) handleRelayDiscovery(w http.ResponseWriter, r *http.Request) { |
| 150 | if !utils.RequireMethod(w, r, http.MethodGet) { |
| 151 | return |
| 152 | } |
| 153 | if s.relaySet == nil { |
| 154 | utils.WriteAPIError(w, http.StatusServiceUnavailable, types.APIErrorCodeFeatureUnavailable, "relay discovery disabled") |
| 155 | return |
| 156 | } |
| 157 | |
| 158 | now := time.Now().UTC() |
| 159 | self, err := s.newSelfDescriptor(now) |
| 160 | if err != nil { |
| 161 | utils.WriteAPIError(w, http.StatusInternalServerError, types.APIErrorCodeInternal, err.Error()) |
| 162 | return |
| 163 | } |
| 164 | |
| 165 | utils.WriteAPIData(w, http.StatusOK, types.DiscoveryResponse{ |
| 166 | ProtocolVersion: types.DiscoveryVersion, |
| 167 | GeneratedAt: now, |
| 168 | Relays: s.relaySet.Descriptors(self), |
| 169 | }) |
| 170 | } |
| 171 | |
| 172 | func (s *Server) handleRelayDiscoveryAnnounce(w http.ResponseWriter, r *http.Request) { |
| 173 | if !utils.RequireMethod(w, r, http.MethodPost) { |
| 174 | return |
| 175 | } |
| 176 | if s.relaySet == nil { |
| 177 | utils.WriteAPIError(w, http.StatusServiceUnavailable, types.APIErrorCodeFeatureUnavailable, "relay discovery disabled") |
| 178 | return |
| 179 | } |
| 180 | clientIP, ok := s.extractAllowedClientIP(w, r) |
| 181 | if !ok { |
| 182 | return |
| 183 | } |
| 184 | if !s.announceLimiter.Allow(clientIP) { |
| 185 | utils.WriteAPIError(w, http.StatusTooManyRequests, types.APIErrorCodeRateLimited, "announce rate limit exceeded") |
| 186 | return |
| 187 | } |
| 188 | |
| 189 | req, ok := utils.DecodeJSONRequest[types.DiscoveryAnnounceRequest](w, r, defaultControlBodyLimit) |
| 190 | if !ok { |
| 191 | return |
| 192 | } |
| 193 | if req.ProtocolVersion != "" && req.ProtocolVersion != types.DiscoveryVersion { |
| 194 | utils.WriteAPIError(w, http.StatusBadRequest, types.APIErrorCodeInvalidRequest, |
| 195 | fmt.Sprintf("announce protocol mismatch: relay=%q client=%q", types.DiscoveryVersion, req.ProtocolVersion)) |
| 196 | return |
| 197 | } |
| 198 | |
| 199 | desc, err := identity.NormalizeRelayDescriptor(req.Descriptor) |
| 200 | if err != nil { |
| 201 | utils.WriteAPIError(w, http.StatusBadRequest, types.APIErrorCodeInvalidRequest, err.Error()) |
| 202 | return |
| 203 | } |
| 204 | // Self-announce guard: the relay's own URL is established locally, not |
| 205 | // gossiped through the announce endpoint. Validate the normalized URL so |
| 206 | // scheme-less inputs are checked the same way signature verification will |
| 207 | // check them later. |
| 208 | announceURL, err := url.Parse(desc.APIHTTPSAddr) |
| 209 | if err != nil { |
| 210 | utils.WriteAPIError(w, http.StatusBadRequest, types.APIErrorCodeInvalidRequest, err.Error()) |
| 211 | return |
| 212 | } |
| 213 | host := utils.NormalizeHostname(announceURL.Hostname()) |
| 214 | if utils.IsLocalRelayHost(host) { |
| 215 | utils.WriteAPIError(w, http.StatusBadRequest, types.APIErrorCodeInvalidRequest, |
| 216 | fmt.Sprintf("self-announce rejected: host %q is local-only", host)) |
| 217 | return |
| 218 | } |
| 219 | cfg := s.config() |
| 220 | if selfURL, err := utils.NormalizeRelayURL(cfg.PortalURL); err == nil && desc.APIHTTPSAddr == selfURL { |
| 221 | utils.WriteAPIError(w, http.StatusBadRequest, types.APIErrorCodeInvalidRequest, |
| 222 | fmt.Sprintf("self-announce rejected: %q matches receiving relay url", desc.APIHTTPSAddr)) |
| 223 | return |
| 224 | } |
| 225 | if host != "" && host == utils.NormalizeHostname(s.identity.Name) { |
| 226 | utils.WriteAPIError(w, http.StatusBadRequest, types.APIErrorCodeInvalidRequest, |
| 227 | fmt.Sprintf("self-announce rejected: host %q matches receiving relay host", host)) |
| 228 | return |
| 229 | } |
| 230 | |
| 231 | now := time.Now().UTC() |
| 232 | if err := s.relaySet.InsertAnnounced(desc, now); err != nil { |
| 233 | utils.WriteAPIError(w, http.StatusBadRequest, types.APIErrorCodeInvalidRequest, err.Error()) |
| 234 | return |
| 235 | } |
| 236 | |
| 237 | log.Info(). |
| 238 | Str("relay", desc.APIHTTPSAddr). |
| 239 | Str("source_ip", clientIP). |
| 240 | Msg("relay discovery announce accepted") |
| 241 | |
| 242 | utils.WriteAPIData(w, http.StatusAccepted, types.DiscoveryAnnounceResponse{ |
| 243 | ProtocolVersion: types.DiscoveryVersion, |
| 244 | Accepted: true, |
| 245 | }) |
| 246 | } |
| 247 | |
| 248 | func (s *Server) handleDomain(w http.ResponseWriter, r *http.Request) { |
| 249 | if !utils.RequireMethod(w, r, http.MethodGet) { |
| 250 | return |
| 251 | } |
| 252 | cfg := s.config() |
| 253 | x402Info := types.X402FacilitatorInfo{Enabled: cfg.X402Enabled} |
| 254 | if cfg.X402Enabled { |
| 255 | baseURL := strings.TrimRight(cfg.PortalURL, "/") |
| 256 | network := x402.Network(cfg.X402Testnet) |
| 257 | x402Info.URL = baseURL + types.PathX402Facilitator |
| 258 | x402Info.Network = network |
| 259 | x402Info.NetworkName = x402.NetworkDisplayName(network) |
| 260 | x402Info.SupportedURL = baseURL + types.X402SupportedPath |
| 261 | x402Info.PayTo = cfg.X402PayTo |
| 262 | } |
| 263 | |
| 264 | utils.WriteAPIData(w, http.StatusOK, types.DomainResponse{ |
| 265 | ProtocolVersion: types.SDKVersion, |
| 266 | ReleaseVersion: types.ReleaseVersion, |
| 267 | ENS: s.acmeManager.ENSStatus(), |
| 268 | X402: x402Info, |
| 269 | }) |
| 270 | } |
| 271 | |
| 272 | func (s *Server) handleRegister(w http.ResponseWriter, r *http.Request) { |
| 273 | if !utils.RequireMethod(w, r, http.MethodPost) { |
| 274 | return |
| 275 | } |
| 276 | |
| 277 | clientIP, ok := s.extractAllowedClientIP(w, r) |
| 278 | if !ok { |
| 279 | return |
| 280 | } |
| 281 | |
| 282 | req, ok := utils.DecodeJSONRequest[types.RegisterRequest](w, r, defaultControlBodyLimit) |
| 283 | if !ok { |
| 284 | return |
| 285 | } |
| 286 | |
| 287 | challenge, err := s.registry.consumeVerifiedRegisterChallenge(req) |
| 288 | if err != nil { |
| 289 | switch { |
| 290 | case errors.Is(err, auth.ErrRegisterChallengeInvalidSignature): |
| 291 | utils.WriteAPIError(w, http.StatusForbidden, types.APIErrorCodeUnauthorized, err.Error()) |
| 292 | default: |
| 293 | utils.InvalidRequestError(err).Write(w) |
| 294 | } |
| 295 | return |
| 296 | } |
| 297 | |
| 298 | record, resp, err := s.registry.Register(challenge.Request, clientIP, req.ReportedIP) |
| 299 | if err != nil { |
| 300 | writeAPIErrorResponse(w, err) |
| 301 | return |
| 302 | } |
| 303 | dnsCtx, cancel := context.WithTimeout(context.WithoutCancel(r.Context()), defaultClaimTimeout) |
| 304 | err = record.syncENSGaslessDNS(dnsCtx, s.acmeManager) |
| 305 | cancel() |
| 306 | if err != nil { |
| 307 | removed, _ := s.registry.Unregister(types.UnregisterRequest{AccessToken: resp.AccessToken}) |
| 308 | if removed == nil { |
| 309 | record.Close() |
| 310 | removed = record |
| 311 | } |
| 312 | cleanupCtx, cleanupCancel := context.WithTimeout(context.WithoutCancel(r.Context()), defaultClaimTimeout) |
| 313 | removed.deleteDNS(cleanupCtx, s.acmeManager, false) |
| 314 | cleanupCancel() |
| 315 | writeAPIErrorResponse(w, err) |
| 316 | return |
| 317 | } |
| 318 | s.registry.promoteECHDNS(record, s.acmeManager, s.config().SNIPort) |
| 319 | |
| 320 | utils.WriteAPIData(w, http.StatusCreated, resp) |
| 321 | } |
| 322 | |
| 323 | func (s *Server) handleRegisterChallenge(w http.ResponseWriter, r *http.Request) { |
| 324 | if !utils.RequireMethod(w, r, http.MethodPost) { |
| 325 | return |
| 326 | } |
| 327 | |
| 328 | clientIP, ok := s.extractAllowedClientIP(w, r) |
| 329 | if !ok { |
| 330 | return |
| 331 | } |
| 332 | |
| 333 | req, ok := utils.DecodeJSONRequest[types.RegisterChallengeRequest](w, r, defaultControlBodyLimit) |
| 334 | if !ok { |
| 335 | return |
| 336 | } |
| 337 | |
| 338 | scheme := "https" |
| 339 | if r.TLS == nil { |
| 340 | scheme = "http" |
| 341 | } |
| 342 | domain := strings.TrimSpace(r.Host) |
| 343 | if domain == "" { |
| 344 | domain = s.identity.Name |
| 345 | } |
| 346 | registerURI := (&url.URL{ |
| 347 | Scheme: scheme, |
| 348 | Host: domain, |
| 349 | Path: types.PathSDKRegister, |
| 350 | }).String() |
| 351 | |
| 352 | if strings.TrimSpace(req.HopToken) != "" && s.overlay == nil { |
| 353 | utils.WriteAPIError(w, http.StatusServiceUnavailable, types.APIErrorCodeFeatureUnavailable, errFeatureUnavailable.Error()) |
| 354 | return |
| 355 | } |
| 356 | if req.UDPEnabled && !s.supportsUDP() { |
| 357 | utils.WriteAPIError(w, http.StatusServiceUnavailable, types.APIErrorCodeFeatureUnavailable, errFeatureUnavailable.Error()) |
| 358 | return |
| 359 | } |
| 360 | if req.TCPEnabled && !s.supportsTCP() { |
| 361 | utils.WriteAPIError(w, http.StatusServiceUnavailable, types.APIErrorCodeFeatureUnavailable, errFeatureUnavailable.Error()) |
| 362 | return |
| 363 | } |
| 364 | |
| 365 | resp, err := s.registry.issueRegisterChallenge(req, domain, registerURI, clientIP) |
| 366 | if err != nil { |
| 367 | writeAPIErrorResponse(w, err) |
| 368 | return |
| 369 | } |
| 370 | |
| 371 | utils.WriteAPIData(w, http.StatusCreated, resp) |
| 372 | } |
| 373 | |
| 374 | func (s *Server) handleRenew(w http.ResponseWriter, r *http.Request) { |
| 375 | if !utils.RequireMethod(w, r, http.MethodPost) { |
| 376 | return |
| 377 | } |
| 378 | |
| 379 | clientIP, ok := s.extractAllowedClientIP(w, r) |
| 380 | if !ok { |
| 381 | return |
| 382 | } |
| 383 | |
| 384 | req, ok := utils.DecodeJSONRequest[types.RenewRequest](w, r, defaultControlBodyLimit) |
| 385 | if !ok { |
| 386 | return |
| 387 | } |
| 388 | |
| 389 | resp, err := s.registry.Renew(req, clientIP) |
| 390 | if err != nil { |
| 391 | writeAPIErrorResponse(w, err) |
| 392 | return |
| 393 | } |
| 394 | |
| 395 | utils.WriteAPIData(w, http.StatusOK, resp) |
| 396 | } |
| 397 | |
| 398 | func (s *Server) handleUnregister(w http.ResponseWriter, r *http.Request) { |
| 399 | if !utils.RequireMethod(w, r, http.MethodPost) { |
| 400 | return |
| 401 | } |
| 402 | |
| 403 | req, ok := utils.DecodeJSONRequest[types.UnregisterRequest](w, r, defaultControlBodyLimit) |
| 404 | if !ok { |
| 405 | return |
| 406 | } |
| 407 | record, err := s.registry.Unregister(req) |
| 408 | if err != nil { |
| 409 | writeAPIErrorResponse(w, err) |
| 410 | return |
| 411 | } |
| 412 | dnsCtx, cancel := context.WithTimeout(context.WithoutCancel(r.Context()), defaultClaimTimeout) |
| 413 | record.deleteDNS(dnsCtx, s.acmeManager, true) |
| 414 | cancel() |
| 415 | |
| 416 | utils.WriteAPIData(w, http.StatusOK, map[string]any{}) |
| 417 | } |
| 418 | |
| 419 | func (s *Server) handleHop(w http.ResponseWriter, r *http.Request) { |
| 420 | switch r.Method { |
| 421 | case http.MethodPost, http.MethodDelete: |
| 422 | default: |
| 423 | utils.MethodNotAllowedError().Write(w) |
| 424 | return |
| 425 | } |
| 426 | if s.overlay == nil || s.relaySet == nil { |
| 427 | utils.WriteAPIError(w, http.StatusServiceUnavailable, types.APIErrorCodeFeatureUnavailable, errFeatureUnavailable.Error()) |
| 428 | return |
| 429 | } |
| 430 | if _, ok := s.extractAllowedClientIP(w, r); !ok { |
| 431 | return |
| 432 | } |
| 433 | |
| 434 | route, ok := utils.DecodeJSONRequest[types.HopRoute](w, r, defaultControlBodyLimit) |
| 435 | if !ok { |
| 436 | return |
| 437 | } |
| 438 | route, err := auth.VerifyHopRoute(r.Method, route) |
| 439 | if errors.Is(err, auth.ErrHopRouteSignatureInvalid) { |
| 440 | utils.WriteAPIError(w, http.StatusForbidden, types.APIErrorCodeUnauthorized, "hop route signature is invalid") |
| 441 | return |
| 442 | } |
| 443 | if err != nil { |
| 444 | utils.InvalidRequestError(err).Write(w) |
| 445 | return |
| 446 | } |
| 447 | cfg := s.config() |
| 448 | if route.RelayURL != cfg.PortalURL { |
| 449 | utils.WriteAPIError(w, http.StatusForbidden, types.APIErrorCodeUnauthorized, "hop route relay url does not match receiving relay") |
| 450 | return |
| 451 | } |
| 452 | if r.Method == http.MethodDelete { |
| 453 | record := s.registry.DeleteHopRoute(&route) |
| 454 | dnsCtx, cancel := context.WithTimeout(context.WithoutCancel(r.Context()), defaultClaimTimeout) |
| 455 | record.deleteDNS(dnsCtx, s.acmeManager, true) |
| 456 | cancel() |
| 457 | utils.WriteAPIData(w, http.StatusOK, map[string]any{}) |
| 458 | return |
| 459 | } |
| 460 | |
| 461 | now := time.Now().UTC() |
| 462 | if !route.ExpiresAt.UTC().After(now) { |
| 463 | utils.InvalidRequestError(errors.New("route expiry must be in the future")).Write(w) |
| 464 | return |
| 465 | } |
| 466 | forwardRelay, err := auth.VerifyRelayDescriptor(route.ForwardRelay) |
| 467 | if err != nil { |
| 468 | utils.InvalidRequestError(fmt.Errorf("forward relay: %w", err)).Write(w) |
| 469 | return |
| 470 | } |
| 471 | if !forwardRelay.HasOverlayPeer() { |
| 472 | utils.InvalidRequestError(errors.New("forward relay wireguard overlay metadata is required")).Write(w) |
| 473 | return |
| 474 | } |
| 475 | route.ForwardRelay = forwardRelay |
| 476 | if err := s.relaySet.InsertAnnounced(forwardRelay, now); err != nil { |
| 477 | utils.InvalidRequestError(fmt.Errorf("forward relay: %w", err)).Write(w) |
| 478 | return |
| 479 | } |
| 480 | if err := s.overlay.Sync(s.relaySet.OverlayPeerDescriptor()); err != nil { |
| 481 | utils.WriteAPIError(w, http.StatusInternalServerError, types.APIErrorCodeInternal, err.Error()) |
| 482 | return |
| 483 | } |
| 484 | record, err := s.registry.RegisterHopRoute(&route, now) |
| 485 | if err != nil { |
| 486 | writeAPIErrorResponse(w, err) |
| 487 | return |
| 488 | } |
| 489 | dnsCtx, cancel := context.WithTimeout(context.WithoutCancel(r.Context()), defaultClaimTimeout) |
| 490 | err = record.syncENSGaslessDNS(dnsCtx, s.acmeManager) |
| 491 | cancel() |
| 492 | if err != nil { |
| 493 | removed := s.registry.DeleteHopRoute(&route) |
| 494 | if removed == nil { |
| 495 | removed = record |
| 496 | } |
| 497 | cleanupCtx, cleanupCancel := context.WithTimeout(context.WithoutCancel(r.Context()), defaultClaimTimeout) |
| 498 | removed.deleteDNS(cleanupCtx, s.acmeManager, false) |
| 499 | cleanupCancel() |
| 500 | writeAPIErrorResponse(w, err) |
| 501 | return |
| 502 | } |
| 503 | s.registry.promoteECHDNS(record, s.acmeManager, cfg.SNIPort) |
| 504 | var accessToken string |
| 505 | if record.isPublicEntry() { |
| 506 | accessToken, err = s.registry.issueLeaseAccessToken(record, now) |
| 507 | if err != nil { |
| 508 | writeAPIErrorResponse(w, &apiError{types.APIErrorCodeInternal, err.Error(), http.StatusInternalServerError}) |
| 509 | return |
| 510 | } |
| 511 | } |
| 512 | utils.WriteAPIData(w, http.StatusOK, types.HopRouteResponse{ |
| 513 | AccessToken: accessToken, |
| 514 | SNIPort: cfg.SNIPort, |
| 515 | }) |
| 516 | } |
| 517 | |
| 518 | func (s *Server) handleConnect(w http.ResponseWriter, r *http.Request) { |
| 519 | if !utils.RequireMethod(w, r, http.MethodGet) { |
| 520 | return |
| 521 | } |
| 522 | if r.ProtoMajor != 1 { |
| 523 | utils.WriteAPIError(w, http.StatusHTTPVersionNotSupported, types.APIErrorCodeHTTP11Only, "reverse connect requires HTTP/1.1") |
| 524 | return |
| 525 | } |
| 526 | |
| 527 | token := strings.TrimSpace(r.Header.Get(types.HeaderAccessToken)) |
| 528 | clientIP, ok := s.extractAllowedClientIP(w, r) |
| 529 | if !ok { |
| 530 | return |
| 531 | } |
| 532 | |
| 533 | lease, err := s.registry.admitLeaseByToken(token, false) |
| 534 | if err != nil { |
| 535 | writeAPIErrorResponse(w, err) |
| 536 | return |
| 537 | } |
| 538 | |
| 539 | hijacker, ok := w.(http.Hijacker) |
| 540 | if !ok { |
| 541 | utils.WriteAPIError(w, http.StatusInternalServerError, types.APIErrorCodeHijackUnsupported, "hijacking is not supported") |
| 542 | return |
| 543 | } |
| 544 | |
| 545 | conn, rw, err := hijacker.Hijack() |
| 546 | if err != nil { |
| 547 | utils.WriteAPIError(w, http.StatusInternalServerError, types.APIErrorCodeHijackFailed, err.Error()) |
| 548 | return |
| 549 | } |
| 550 | |
| 551 | if _, err := rw.WriteString("HTTP/1.1 101 Switching Protocols\r\nUpgrade: raw\r\nConnection: Upgrade\r\n\r\n"); err != nil { |
| 552 | _ = conn.Close() |
| 553 | return |
| 554 | } |
| 555 | if err := rw.Flush(); err != nil { |
| 556 | _ = conn.Close() |
| 557 | return |
| 558 | } |
| 559 | |
| 560 | remoteAddr := "" |
| 561 | if conn.RemoteAddr() != nil { |
| 562 | remoteAddr = conn.RemoteAddr().String() |
| 563 | } |
| 564 | if err := lease.stream.OfferConn(conn); err != nil { |
| 565 | log.Warn(). |
| 566 | Err(err). |
| 567 | Str("address", lease.Address). |
| 568 | Str("lease_name", lease.Name). |
| 569 | Str("remote_addr", remoteAddr). |
| 570 | Msg("sdk reverse rejected") |
| 571 | return |
| 572 | } |
| 573 | |
| 574 | s.registry.Touch(lease.Key(), clientIP, time.Now()) |
| 575 | log.Info(). |
| 576 | Str("address", lease.Address). |
| 577 | Str("lease_name", lease.Name). |
| 578 | Str("remote_addr", remoteAddr). |
| 579 | Int("ready", lease.stream.ReadyCount()). |
| 580 | Msg("sdk reverse connected") |
| 581 | } |
| 582 | |
| 583 | func (s *Server) extractAllowedClientIP(w http.ResponseWriter, r *http.Request) (string, bool) { |
| 584 | clientIP := s.registry.policy.ExtractClientIP(r) |
| 585 | if !s.registry.policy.IPFilter().IsIPBanned(clientIP) { |
| 586 | return clientIP, true |
| 587 | } |
| 588 | utils.WriteAPIError(w, http.StatusForbidden, types.APIErrorCodeIPBanned, "request denied because source IP is banned") |
| 589 | return "", false |
| 590 | } |