4 * The secure anycast tunneling protocol (satp) defines a protocol used
5 * for communication between any combination of unicast and anycast
6 * tunnel endpoints. It has less protocol overhead than IPSec in Tunnel
7 * mode and allows tunneling of every ETHER TYPE protocol (e.g.
8 * ethernet, ip, arp ...). satp directly includes cryptography and
9 * message authentication based on the methodes used by SRTP. It is
10 * intended to deliver a generic, scaleable and secure solution for
11 * tunneling and relaying of packets of any protocol.
14 * Copyright (C) 2007-2008 Othmar Gsenger, Erwin Nindl,
15 * Christian Pointner <satp@wirdorange.org>
17 * This file is part of Anytun.
19 * Anytun is free software: you can redistribute it and/or modify
20 * it under the terms of the GNU General Public License version 3 as
21 * published by the Free Software Foundation.
23 * Anytun is distributed in the hope that it will be useful,
24 * but WITHOUT ANY WARRANTY; without even the implied warranty of
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26 * GNU General Public License for more details.
28 * You should have received a copy of the GNU General Public License
29 * along with anytun. If not, see <http://www.gnu.org/licenses/>.
37 #include <boost/archive/text_oarchive.hpp>
38 #include <boost/archive/text_iarchive.hpp>
39 #include "datatypes.h"
42 Buffer::Buffer(bool allow_realloc) : buf_(0), length_(0), real_length_(0), allow_realloc_(allow_realloc)
46 Buffer::Buffer(u_int32_t length, bool allow_realloc) : length_(length), real_length_(length_ + Buffer::OVER_SIZE_),
47 allow_realloc_(allow_realloc)
49 buf_ = new u_int8_t[real_length_];
53 throw std::bad_alloc();
55 std::memset(buf_, 0, real_length_);
58 Buffer::Buffer(u_int8_t* data, u_int32_t length, bool allow_realloc) : length_(length), real_length_(length + Buffer::OVER_SIZE_),
59 allow_realloc_(allow_realloc)
67 buf_ = new u_int8_t[real_length_];
71 throw std::bad_alloc();
73 std::memcpy(buf_, data, length_);
76 Buffer::Buffer(std::string hex_data, bool allow_realloc) : length_(static_cast<u_int32_t>(hex_data.size())/2),
77 real_length_(length_ + Buffer::OVER_SIZE_),
78 allow_realloc_(allow_realloc)
80 buf_ = new u_int8_t[real_length_];
84 throw std::bad_alloc();
87 for(u_int32_t i=0; i<length_; ++i)
90 std::istringstream ss(std::string(hex_data.c_str(), i*2, 2));
91 if(!(ss >> std::hex >> tmp)) tmp = 0;
92 buf_[i] = static_cast<u_int8_t>(tmp);
102 Buffer::Buffer(const Buffer &src) : length_(src.length_), real_length_(src.real_length_), allow_realloc_(src.allow_realloc_)
104 buf_ = new u_int8_t[real_length_];
108 throw std::bad_alloc();
110 std::memcpy(buf_, src.buf_, length_);
113 void Buffer::operator=(const Buffer &src)
118 length_ = src.length_;
119 real_length_ = src.real_length_;
120 allow_realloc_ = src.allow_realloc_;
122 buf_ = new u_int8_t[real_length_];
126 throw std::bad_alloc();
128 std::memcpy(buf_, src.buf_, length_);
131 bool Buffer::operator==(const Buffer &cmp) const
133 if(length_ != cmp.length_)
136 if(!std::memcmp(buf_, cmp.buf_, length_))
142 Buffer Buffer::operator^(const Buffer &xor_by) const
144 u_int32_t res_length = (xor_by.length_ > length_) ? xor_by.length_ : length_;
145 u_int32_t min_length = (xor_by.length_ < length_) ? xor_by.length_ : length_;
146 Buffer res(res_length);
148 for( u_int32_t index = 0; index < min_length; index++ )
149 res[index] = buf_[index] ^ xor_by[index];
154 u_int32_t Buffer::getLength() const
159 void Buffer::setLength(u_int32_t new_length)
161 if(new_length == length_)
164 if(new_length > real_length_)
167 throw std::out_of_range("buffer::setLength() - reallocation not allowed for this Buffer");
169 u_int8_t* old_buf = buf_;
170 u_int32_t old_length = length_;
172 length_ = new_length;
173 real_length_ = length_ + Buffer::OVER_SIZE_;
175 buf_ = new u_int8_t[real_length_];
182 throw std::bad_alloc();
184 std::memcpy(buf_, old_buf, old_length);
189 old_buf = &buf_[old_length];
190 std::memset(old_buf, 0, real_length_ - old_length);
193 length_ = new_length;
199 u_int8_t* Buffer::getBuf()
204 u_int8_t& Buffer::operator[](u_int32_t index)
207 throw std::out_of_range("buffer::operator[]");
212 u_int8_t Buffer::operator[](u_int32_t index) const
215 throw std::out_of_range("buffer::operator[] const");
220 Buffer::operator u_int8_t*()
225 std::string Buffer::getHexDump() const
227 std::stringstream ss;
228 ss << "Length=" << length_ << std::endl << std::hex << std::uppercase;
229 for( u_int32_t index = 0; index < length_; index++ )
231 ss << std::setw(2) << std::setfill('0') << u_int32_t(buf_[index]) << " ";
232 if(!((index+1) % 16)) {
242 std::string Buffer::getHexDumpOneLine() const
244 std::stringstream ss;
245 ss << length_ << " Bytes,'" << std::hex << std::uppercase;
246 for( u_int32_t index = 0; index < length_; index++ )
248 ss << std::setw(2) << std::setfill('0') << u_int32_t(buf_[index]);
254 bool Buffer::isReallocAllowed() const
256 return allow_realloc_;