Socket/Protocols/INet/INet6Address.cc

   1 // $Id$
   2 //
   3 // Copyright (C) 2007
   4 // Fraunhofer Institute for Open Communication Systems (FOKUS)
   5 // Competence Center NETwork research (NET), St. Augustin, GERMANY
   6 //     Stefan Bund <g0dil@berlios.de>
   7 //
   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.
  12 //
  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.
  17 //
  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.
  22
  23 /** \file
  24     \brief INet6Address non-inline non-template implementation */
  25
  26 #include "INet6Address.hh"
  27 #include "INet6Address.ih"
  28
  29 // Custom includes
  30 #include <sys/types.h>
  31 #include <sys/socket.h>
  32 #include <netinet/in.h>
  33 #include <arpa/inet.h>
  34 #include <netdb.h>
  35 #include <boost/lexical_cast.hpp>
  36
  37 //#include "INet6Address.mpp"
  38 #define prefix_
  39 ///////////////////////////////cc.p////////////////////////////////////////
  40
  41 ///////////////////////////////////////////////////////////////////////////
  42 // senf::INet6Address
  43
  44 prefix_ senf::INet6Address senf::INet6Address::from_string(std::string const & s,
  45                                                            Resolve_t resolve)
  46 {
  47     struct in6_addr ina;
  48     if (::inet_pton(AF_INET6,s.c_str(),&ina) > 0)
  49         return senf::INet6Address::from_data(&ina.s6_addr[0]);
  50
  51     if (s.empty())
  52         throw SyntaxException();
  53
  54     int herr (0);
  55
  56     // If available, we use the reentrant GNU variant. This has the additional advantage, that we
  57     // can explicitly ask for IPv4 addresses
  58
  59 #   ifdef __GLIBC__
  60
  61     struct hostent entbuf;
  62     char buffer[4096];
  63     struct hostent * ent (0);
  64     ::gethostbyname2_r(s.c_str(), AF_INET6, &entbuf, buffer, sizeof(buffer), &ent, &herr);
  65
  66 #   else // ! __GLIBC__
  67
  68 #   ifdef _REENTRANT
  69     static boost::mutex mutex;
  70     boost::mutex::scoped_lock lock(mutex);
  71 #   endif
  72     struct hostent * ent (::gethostbyname(s.c_str()));
  73     herr = h_errno;
  74
  75 #   endif // __GLIBC__
  76
  77     if (ent && ent->h_addrtype == AF_INET6)
  78         // We are only interested in the first address ...
  79         return senf::INet6Address::from_data(
  80             &reinterpret_cast<in6_addr*>(*(ent->h_addr_list))->s6_addr[0]);
  81
  82     if (resolve == ResolveINet4)
  83         try {
  84             return from_inet4address(INet4Address::from_string(s));
  85         } catch (INet4Address::SyntaxException const & ex) {
  86             throw SyntaxException();
  87         } catch (INet4Address::UnknownHostnameException const & ex) {
  88             throw UnknownHostnameException();
  89         }
  90     else
  91         throw UnknownHostnameException();
  92 }
  93
  94 prefix_ std::ostream & senf::operator<<(std::ostream & os, INet6Address const & addr)
  95 {
  96     ::in6_addr ina;
  97     char buffer[5*8];
  98     std::copy(addr.begin(),addr.end(),&ina.s6_addr[0]);
  99     ::inet_ntop(AF_INET6,&ina,buffer,sizeof(buffer));
 100     buffer[sizeof(buffer)-1] = 0;
 101     os << buffer;
 102     return os;
 103 }
 104
 105 senf::INet6Address const senf::INet6Address::None;
 106 senf::INet6Address const senf::INet6Address::Loopback   (0u,0u,0u,0u,0u,0u,0u,1u);
 107 senf::INet6Address const senf::INet6Address::AllNodes   (0xFF02u,0u,0u,0u,0u,0u,0u,1u);
 108 senf::INet6Address const senf::INet6Address::AllRouters (0xFF02u,0u,0u,0u,0u,0u,0u,2u);
 109
 110 ///////////////////////////////////////////////////////////////////////////
 111 // senf::INet6Network
 112
 113 prefix_ senf::INet6Network::INet6Network(std::string s)
 114 {
 115     using boost::lambda::_1;
 116     using boost::lambda::_2;
 117     std::string::size_type i (s.find('/'));
 118     if (i == std::string::npos)
 119         throw INet6Address::SyntaxException();
 120     try {
 121         prefix_len_ = boost::lexical_cast<unsigned>(std::string(s,i+1));
 122     } catch (boost::bad_lexical_cast const &) {
 123         throw INet6Address::SyntaxException();
 124     }
 125     address_ = INet6Address::from_string(std::string(s, 0, i));
 126     detail::apply_mask(prefix_len_, address_.begin(), address_.end(), _1 &= _2);
 127 }
 128
 129 ///////////////////////////////cc.e////////////////////////////////////////
 130 #undef prefix_
 131 //#include "INet6Address.mpp"
 132
 133 \f
 134 // Local Variables:
 135 // mode: c++
 136 // fill-column: 100
 137 // comment-column: 40
 138 // c-file-style: "senf"
 139 // indent-tabs-mode: nil
 140 // ispell-local-dictionary: "american"
 141 // compile-command: "scons -u test"
 142 // End: