--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/servlib/bundling/UnknownBlockProcessor.cc	Thu Apr 21 14:57:45 2011 +0100
@@ -0,0 +1,146 @@
+/*
+ *    Copyright 2006 Intel Corporation
+ * 
+ *    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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include <dtn-config.h>
+#endif
+
+#include "UnknownBlockProcessor.h"
+
+#include "BlockInfo.h"
+#include "BundleProtocol.h"
+#include "Bundle.h"
+
+namespace dtn {
+
+template <> UnknownBlockProcessor*
+oasys::Singleton<UnknownBlockProcessor>::instance_ = NULL;
+
+//----------------------------------------------------------------------
+UnknownBlockProcessor::UnknownBlockProcessor()
+    : BlockProcessor(BundleProtocol::UNKNOWN_BLOCK)
+      // typecode is ignored for this processor
+      // pl -- this raises the interesting situation where
+      // source->type()                  returns the actual type, and
+      // source->owner_->block_type()    will return UNKNOWN_BLOCK
+{
+}
+
+//----------------------------------------------------------------------
+int
+UnknownBlockProcessor::prepare(const Bundle*    bundle,
+                               BlockInfoVec*    xmit_blocks,
+                               const BlockInfo* source,
+                               const LinkRef&   link,
+                               list_owner_t     list)
+{
+    ASSERT(source != NULL);
+    ASSERT(source->owner() == this);
+
+    if (source->flags() & BundleProtocol::BLOCK_FLAG_DISCARD_BLOCK_ONERROR) {
+        return BP_FAIL;
+    }
+
+    // If we're called for this type then security is not enabled
+    // and we should NEVER forward BAB
+    if (source->type() == BundleProtocol::BUNDLE_AUTHENTICATION_BLOCK) {
+        return BP_FAIL;
+    }
+
+    return BlockProcessor::prepare(bundle, xmit_blocks, source, link, list);
+}
+
+//----------------------------------------------------------------------
+int
+UnknownBlockProcessor::generate(const Bundle*  bundle,
+                                BlockInfoVec*  xmit_blocks,
+                                BlockInfo*     block,
+                                const LinkRef& link,
+                                bool           last)
+{
+    (void)bundle;
+    (void)link;
+    (void)xmit_blocks;
+    
+    // This can only be called if there was a corresponding block in
+    // the input path
+    const BlockInfo* source = block->source();
+    ASSERT(source != NULL);
+    ASSERT(source->owner() == this);
+
+    // We shouldn't be here if the block has the following flags set
+    ASSERT((source->flags() &
+            BundleProtocol::BLOCK_FLAG_DISCARD_BUNDLE_ONERROR) == 0);
+    ASSERT((source->flags() &
+            BundleProtocol::BLOCK_FLAG_DISCARD_BLOCK_ONERROR) == 0);
+    
+    // The source better have some contents, but doesn't need to have
+    // any data necessarily
+    ASSERT(source->contents().len() != 0);
+    ASSERT(source->data_offset() != 0);
+    
+    u_int8_t flags = source->flags();
+    if (last) {
+        flags |= BundleProtocol::BLOCK_FLAG_LAST_BLOCK;
+    } else {
+        flags &= ~BundleProtocol::BLOCK_FLAG_LAST_BLOCK;
+    }
+    flags |= BundleProtocol::BLOCK_FLAG_FORWARDED_UNPROCESSED;
+    
+    block->set_eid_list(source->eid_list());
+
+    generate_preamble(xmit_blocks, block, source->type(), flags,
+                      source->data_length());
+    ASSERT(block->data_length() == source->data_length());
+    
+    BlockInfo::DataBuffer* contents = block->writable_contents();
+    contents->reserve(block->full_length());
+    memcpy(contents->buf()          + block->data_offset(),
+           source->contents().buf() + source->data_offset(),
+           block->data_length());
+    contents->set_len(block->full_length());
+
+    return BP_SUCCESS;
+}
+
+//----------------------------------------------------------------------
+bool
+UnknownBlockProcessor::validate(const Bundle*           bundle,
+                                BlockInfoVec*           block_list,
+                                BlockInfo*              block,
+                                status_report_reason_t* reception_reason,
+                                status_report_reason_t* deletion_reason)
+{
+    // check for generic block errors
+    if (!BlockProcessor::validate(bundle, block_list, block,
+                                  reception_reason, deletion_reason)) {
+        return false;
+    }
+
+    // extension blocks of unknown type are considered to be "invalid"
+    if (block->flags() & BundleProtocol::BLOCK_FLAG_REPORT_ONERROR) {
+        *reception_reason = BundleProtocol::REASON_BLOCK_UNINTELLIGIBLE;
+    }
+
+    if (block->flags() & BundleProtocol::BLOCK_FLAG_DISCARD_BUNDLE_ONERROR) {
+        *deletion_reason = BundleProtocol::REASON_BLOCK_UNINTELLIGIBLE;
+        return false;
+    }
+
+    return true;
+}
+
+} // namespace dtn