NS-3 based Named Data Networking (NDN) simulator
ndnSIM: NDN, CCN, CCNx, content centric networks
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attr.cc
1 /* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
2 /*
3  * Copyright (c) 2011 University of California, Los Angeles
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License version 2 as
7  * published by the Free Software Foundation;
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program; if not, write to the Free Software
16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17  *
18  * Author: Alexander Afanasyev <alexander.afanasyev@ucla.edu>
19  */
20 
21 #include "attr.h"
22 #include "../common.h"
23 
24 NDN_NAMESPACE_BEGIN
25 
26 namespace wire {
27 namespace CcnbParser {
28 
29 // length length in octets of UTF-8 encoding of tag name - 1 (minimum tag name length is 1)
30 Attr::Attr (Buffer::Iterator &start, uint32_t length)
31 {
32  m_attr.reserve (length+2); // extra byte for potential \0 at the end
33  uint32_t i = 0;
34  for (; !start.IsEnd () && i < (length+1); i++)
35  {
36  m_attr.push_back (start.ReadU8 ());
37  }
38  if (i < (length+1) && start.IsEnd ())
39  throw CcnbDecodingException ();
40  m_value = DynamicCast<Udata> (Block::ParseBlock (start));
41  if (m_value == 0)
42  throw CcnbDecodingException (); // "ATTR must be followed by UDATA field"
43 }
44 
45 } // namespace CcnbParser
46 } // namespace wire
47 
48 NDN_NAMESPACE_END
Exception thrown if there is a parsing error.
Definition: common.h:50