1 files changed, 81 insertions, 0 deletions
diff --git a/sources/hv-collector-server/src/main/kotlin/org/onap/dcae/collectors/veshv/impl/networking.kt b/sources/hv-collector-server/src/main/kotlin/org/onap/dcae/collectors/veshv/impl/networking.kt
new file mode 100644
index 00000000..eb51cf4b
--- /dev/null
+++ b/sources/hv-collector-server/src/main/kotlin/org/onap/dcae/collectors/veshv/impl/networking.kt
@@ -0,0 +1,81 @@
+/*
+ * ============LICENSE_START=======================================================
+ * dcaegen2-collectors-veshv
+ * ================================================================================
+ * Copyright (C) 2019 NOKIA
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.dcae.collectors.veshv.impl
+
+import arrow.core.Option
+import arrow.core.Try
+import arrow.syntax.collections.firstOption
+import io.netty.handler.ssl.SslHandler
+import io.netty.util.concurrent.Future
+import org.onap.dcae.collectors.veshv.domain.logging.ClientContext
+import reactor.core.publisher.Mono
+import reactor.netty.ByteBufFlux
+import reactor.netty.Connection
+import reactor.netty.NettyInbound
+import reactor.netty.NettyOutbound
+import java.net.InetAddress
+import java.security.cert.X509Certificate
+import javax.net.ssl.SSLSession
+
+internal fun InetAddress.isLocalClientAddress() = hostAddress == "127.0.0.1" || hostName == "localhost"
+
+internal fun Connection.getSslSession(): Option<SSLSession> =
+        Option.fromNullable(
+                channel()
+                        .pipeline()
+                        .get(SslHandler::class.java)
+                        ?.engine()
+                        ?.session
+        )
+
+internal fun SSLSession.findClientCert(): Option<X509Certificate> =
+        peerCertificates
+                .firstOption()
+                .flatMap { Option.fromNullable(it as? X509Certificate) }
+
+internal fun withConnectionFrom(nettyInboud: NettyInbound, task: (Connection) -> Unit) =
+        nettyInboud.withConnection(task)
+
+internal fun Connection.closeChannel() = channel().close()
+
+internal fun Connection.closeChannelAndThen(task: (Future<in Void>) -> Unit) =
+        closeChannel().addListener { task(it) }
+
+internal fun <T> NettyInbound.closeConnectionAndReturn(returnValue: T): T =
+        withConnectionFrom(this) { it.closeChannel() }.let { returnValue }
+
+internal fun NettyInbound.createDataStream(): ByteBufFlux = receive().retain()
+
+//
+// ClientContext related
+//
+
+internal inline fun withNewClientContextFrom(nettyInbound: NettyInbound,
+                                             nettyOutbound: NettyOutbound,
+                                             reactiveTask: (ClientContext) -> Mono<Void>) =
+        ClientContext(nettyOutbound.alloc())
+                .also { populateClientContextFromInbound(it, nettyInbound) }
+                .run(reactiveTask)
+
+internal fun populateClientContextFromInbound(clientContext: ClientContext, nettyInbound: NettyInbound) =
+        withConnectionFrom(nettyInbound) { connection ->
+            clientContext.clientAddress = Try { connection.address().address }.toOption()
+            clientContext.clientCert = connection.getSslSession().flatMap { it.findClientCert() }
+        }