4 // Fraunhofer Institute for Open Communication Systems (FOKUS)
5 // Competence Center NETwork research (NET), St. Augustin, GERMANY
6 // Stefan Bund <g0dil@berlios.de>
8 // This program is free software; you can redistribute it and/or modify
9 // it under the terms of the GNU General Public License as published by
10 // the Free Software Foundation; either version 2 of the License, or
11 // (at your option) any later version.
13 // This program is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 // GNU General Public License for more details.
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the
20 // Free Software Foundation, Inc.,
21 // 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24 \brief PacketType non-inline template implementation */
26 //#include "PacketType.ih"
31 ///////////////////////////////ct.p////////////////////////////////////////
33 ///////////////////////////////////////////////////////////////////////////
34 // senf::PacketTypeMixin<Self,void>
37 prefix_ senf::PacketInterpreterBase::optional_range
38 senf::PacketTypeMixin<Self,void>::nextPacketRange(Packet const & p)
40 typename Self::size_type sz (Self::initHeadSize());
41 ///\idea This if condition could be replaced with a compile time switch by checking, wether
42 /// (the function address) Self::initHeadSize is different from PacketTypeBase::initHeadSize
43 if (sz == PacketTypeBase::size_type(-1)) {
44 typename Self::size_type headsz (bytes(p.as< ConcretePacket<Self> >().parser()));
45 return p.data().size() < headsz ?
46 PacketTypeBase::no_range() :
47 PacketInterpreterBase::optional_range(
48 PacketTypeBase::range(boost::next(p.data().begin(), headsz),
52 // If we have a trailer, we do *not* use the 'bytes' value but initSize/initHeadSize, this
53 // is much safer since the bytes() value will probably not be very correct anyways (what
54 // should it return ? the size of the header only, the combined size of header and trailer
55 // or the size of the packet from header to trailer including payload?).
57 // So, the helper only works with fixed-size parsers if the packet has a trailer.
58 return p.data().size() < Self::initSize() ?
59 PacketTypeBase::no_range() :
60 PacketInterpreterBase::optional_range(
61 PacketTypeBase::range(boost::next(p.data().begin(),sz),
62 boost::prior(p.data().end(),Self::initSize()-sz)));
65 ///////////////////////////////ct.e////////////////////////////////////////
73 // c-file-style: "senf"
74 // indent-tabs-mode: nil
75 // ispell-local-dictionary: "american"
76 // compile-command: "scons -u test"