Add file missing in 44026571

psiphon/server/dsl.go

@@ -0,0 +1,92 @@
+/*
+ * Copyright (c) 2025, Psiphon Inc.
+ * All rights reserved.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+package server
+
+import (
+	"context"
+	"time"
+
+	"github.com/Psiphon-Labs/psiphon-tunnel-core/psiphon/common"
+	"github.com/Psiphon-Labs/psiphon-tunnel-core/psiphon/common/dsl"
+	"github.com/Psiphon-Labs/psiphon-tunnel-core/psiphon/common/errors"
+	"github.com/Psiphon-Labs/psiphon-tunnel-core/psiphon/common/parameters"
+)
+
+func dslReloadRelayTactics(support *SupportServices) error {
+
+	// Assumes no GeoIP targeting for DSL relay tactics.
+
+	dslRelay := support.dslRelay
+
+	if dslRelay == nil {
+		return nil
+	}
+
+	p, err := support.ServerTacticsParametersCache.Get(NewGeoIPData())
+	if err != nil {
+		return errors.Trace(err)
+	}
+	defer p.Close()
+	if p.IsNil() {
+		return nil
+	}
+
+	dslRelay.SetRequestParameters(
+		p.Int(parameters.DSLRelayMaxHttpConns),
+		p.Int(parameters.DSLRelayMaxHttpIdleConns),
+		p.Duration(parameters.DSLRelayHttpIdleConnTimeout),
+		p.Duration(parameters.DSLRelayRequestTimeout),
+		p.Int(parameters.DSLRelayRetryCount))
+
+	dslRelay.SetCacheParameters(
+		p.Duration(parameters.DSLRelayCacheTTL),
+		p.Int(parameters.DSLRelayCacheMaxSize))
+
+	return nil
+}
+
+func dslHandleRequest(
+	ctx context.Context,
+	support *SupportServices,
+	extendTimeout func(time.Duration),
+	clientIP string,
+	clientGeoIPData common.GeoIPData,
+	requestPayload []byte) ([]byte, error) {
+
+	relay := support.dslRelay
+
+	if relay == nil {
+		return dsl.GetRelayGenericErrorResponse(),
+			errors.TraceNew("DSL relay not configured")
+	}
+
+	responsePayload, err := relay.HandleRequest(
+		ctx,
+		extendTimeout,
+		clientIP,
+		clientGeoIPData,
+		requestPayload)
+	if err != nil {
+		return dsl.GetRelayGenericErrorResponse(),
+			errors.Trace(err)
+	}
+
+	return responsePayload, nil
+}