1 files changed, 90 insertions, 0 deletions
diff --git a/metis/ccnx/forwarder/metis/io/metis_UdpTunnel.c b/metis/ccnx/forwarder/metis/io/metis_UdpTunnel.c
new file mode 100644
index 00000000..77424dce
--- /dev/null
+++ b/metis/ccnx/forwarder/metis/io/metis_UdpTunnel.c
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * 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.
+ */
+
+
+#include <config.h>
+#include <stdio.h>
+#include <stdbool.h>
+#include <string.h>
+#include <errno.h>
+
+#include <ccnx/forwarder/metis/io/metis_UdpTunnel.h>
+#include <ccnx/forwarder/metis/io/metis_UdpConnection.h>
+
+#include <LongBow/runtime.h>
+
+MetisIoOperations *
+metisUdpTunnel_CreateOnListener(MetisForwarder *metis, MetisListenerOps *localListener, const CPIAddress *remoteAddress)
+{
+    assertNotNull(metis, "Parameter metis must be non-null");
+    assertNotNull(localListener, "Parameter localListener must be non-null");
+    assertNotNull(remoteAddress, "Parameter remoteAddress must be non-null");
+
+    MetisLogger *logger = metisForwarder_GetLogger(metis);
+
+    MetisIoOperations *ops = NULL;
+    if (localListener->getEncapType(localListener) == METIS_ENCAP_UDP) {
+        const CPIAddress *localAddress = localListener->getListenAddress(localListener);
+        CPIAddressType localType = cpiAddress_GetType(localAddress);
+        CPIAddressType remoteType = cpiAddress_GetType(remoteAddress);
+
+        if (localType == remoteType) {
+            MetisAddressPair *pair = metisAddressPair_Create(localAddress, remoteAddress);
+            bool isLocal = false;
+            int fd = localListener->getSocket(localListener);
+            ops = metisUdpConnection_Create(metis, fd, pair, isLocal);
+            
+            metisAddressPair_Release(&pair);
+        } else {
+            if (metisLogger_IsLoggable(logger, MetisLoggerFacility_IO, PARCLogLevel_Error)) {
+                metisLogger_Log(logger, MetisLoggerFacility_IO, PARCLogLevel_Error, __func__,
+                                "Local listener of type %s and remote type %s, cannot establish tunnel",
+                                cpiAddress_TypeToString(localType),
+                                cpiAddress_TypeToString(remoteType));
+            }
+        }
+    } else {
+        if (metisLogger_IsLoggable(logger, MetisLoggerFacility_IO, PARCLogLevel_Error)) {
+            metisLogger_Log(logger, MetisLoggerFacility_IO, PARCLogLevel_Error, __func__,
+                            "Local listener %p is not type UDP, cannot establish tunnel", (void *) localListener);
+        }
+    }
+
+    return ops;
+}
+
+/*
+ * wrapper for metisUdpTunnel_CreateOnListener.  Lookup to see if we have a listener on the local address.
+ * If so, call metisUdpTunnel_CreateOnListener, otherwise return NULL
+ */
+MetisIoOperations *
+metisUdpTunnel_Create(MetisForwarder *metis, const CPIAddress *localAddress, const CPIAddress *remoteAddress)
+{
+    MetisListenerSet *set = metisForwarder_GetListenerSet(metis);
+    MetisListenerOps *listener = metisListenerSet_Find(set, METIS_ENCAP_UDP, localAddress);
+    MetisIoOperations *ops = NULL;
+    if (listener) {
+        ops = metisUdpTunnel_CreateOnListener(metis, listener, remoteAddress);
+    } else {
+        if (metisLogger_IsLoggable(metisForwarder_GetLogger(metis), MetisLoggerFacility_IO, PARCLogLevel_Error)) {
+            char *str = cpiAddress_ToString(localAddress);
+            metisLogger_Log(metisForwarder_GetLogger(metis), MetisLoggerFacility_IO, PARCLogLevel_Error, __func__,
+                            "Could not find listener to match address %s", str);
+            parcMemory_Deallocate((void **) &str);
+        }
+    }
+    return ops;
+}
+