00001 /* 00002 * IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING. By 00003 * downloading, copying, installing or using the software you agree to 00004 * this license. If you do not agree to this license, do not download, 00005 * install, copy or use the software. 00006 * 00007 * Intel Open Source License 00008 * 00009 * Copyright (c) 2004 Intel Corporation. All rights reserved. 00010 * 00011 * Redistribution and use in source and binary forms, with or without 00012 * modification, are permitted provided that the following conditions are 00013 * met: 00014 * 00015 * Redistributions of source code must retain the above copyright 00016 * notice, this list of conditions and the following disclaimer. 00017 * 00018 * Redistributions in binary form must reproduce the above copyright 00019 * notice, this list of conditions and the following disclaimer in the 00020 * documentation and/or other materials provided with the distribution. 00021 * 00022 * Neither the name of the Intel Corporation nor the names of its 00023 * contributors may be used to endorse or promote products derived from 00024 * this software without specific prior written permission. 00025 * 00026 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 00027 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 00028 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 00029 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE INTEL OR 00030 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 00031 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 00032 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 00033 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 00034 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 00035 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 00036 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00037 */ 00038 #ifndef __FRAGMENT_MANAGER_H__ 00039 #define __FRAGMENT_MANAGER_H__ 00040 00041 #include <string> 00042 #include <oasys/debug/Log.h> 00043 #include <oasys/util/StringUtils.h> 00044 00045 namespace oasys { 00046 class SpinLock; 00047 } 00048 00049 namespace dtn { 00050 00051 class Bundle; 00052 class BundleList; 00053 00054 // XXX/demmer should change the overall flow of the reassembly so all 00055 // arriving bundle fragments are enqueued onto the appropriate 00056 // reassembly state list immediately -- in fact all the fragmentation 00057 // and reassembly stuff needs rework 00058 00066 class FragmentManager : public oasys::Logger { 00067 public: 00071 FragmentManager(); 00072 00092 Bundle* create_fragment(Bundle* bundle, size_t offset, size_t length); 00093 00100 void convert_to_fragment(Bundle* bundle, size_t length); 00101 00111 int proactively_fragment(Bundle* bundle, size_t max_length); 00112 00119 bool try_to_reactively_fragment(Bundle* bundle, size_t bytes_sent); 00120 00127 void process_for_reassembly(Bundle* fragment); 00128 00129 protected: 00131 struct ReassemblyState { 00132 ReassemblyState() 00133 : bundle_("reassembly_state"), fragments_("reassembly_state") 00134 {} 00135 00136 BundleRef bundle_; 00137 BundleList fragments_; 00138 }; 00139 00143 void get_hash_key(const Bundle*, std::string* key); 00144 00148 bool check_completed(ReassemblyState* state); 00149 00151 typedef oasys::StringHashMap<ReassemblyState*> ReassemblyTable; 00152 ReassemblyTable reassembly_table_; 00153 }; 00154 00155 } // namespace dtn 00156 00157 #endif /* __FRAGMENT_MANAGER_H__ */