+// $Id$
+//
// Copyright (C) 2007
-// Fraunhofer Institut fuer offene Kommunikationssysteme (FOKUS)
-// Kompetenzzentrum fuer Satelitenkommunikation (SatCom)
+// Fraunhofer Institute for Open Communication Systems (FOKUS)
+// Competence Center NETwork research (NET), St. Augustin, GERMANY
// Stefan Bund <g0dil@berlios.de>
//
// This program is free software; you can redistribute it and/or modify
#include <iostream>
#include <string>
#include <boost/cstdint.hpp>
-#include <boost/function.hpp>
#include <boost/array.hpp>
-#include "Utils/SafeBool.hh"
+#include <boost/operators.hpp>
+#include "../../../Utils/safe_bool.hh"
+#include "../../../Utils/Tags.hh"
#include "INet4Address.hh"
//#include "INet6Address.mpp"
namespace senf {
- /** \brief IpV6 network address
+ /** \brief IPv6 network address
- This implementation of an IpV6 address is based strictly on RFC 4291: Internet Protocol
+ This implementation of an IPv6 address is based strictly on
+ <a href="http://tools.ietf.org/html/rfc4291">RFC 4291</a>: Internet Protocol
Version 6 (IPv6) Addressing Architecture. This class provides accessors to all the
information fields defined in this document.
- The IpV6 addressing architecture however has several other components defined in other
+ The IPv6 addressing architecture however has several other components defined in other
RFC's. These RFC's should be implemented in additional modules:
- \li RFC4193: Unique Local Addresses (ULA). Defines the fc00::/7 prefix
- \li RFC3306: Unicast-Prefix-based IPv6 Multicast Addresses. Defines the ff30::/12 prefix
- \li RFC3956: Embedding the Rendezvous Point (RP) Address in an IPv6 Multicast
+ \li <a href="http://tools.ietf.org/html/rfc4193">RFC 4193</a>:
+ Unique Local Addresses (ULA). Defines the fc00::/7 prefix
+ \li <a href="http://tools.ietf.org/html/rfc3306">RFC 3306</a>:
+ Unicast-Prefix-based IPv6 Multicast Addresses. Defines the ff30::/12 prefix
+ \li <a href="http://tools.ietf.org/html/rfc3956">RFC 3956</a>:
+ Embedding the Rendezvous Point (RP) Address in an IPv6 Multicast
Address. Defines the ff70::/12 prefix
- \li RFC3056: Connection of IPv6 Domains via IPv4 Clouds. Defines 6to4 tunneling and the
+ \li <a href="http://tools.ietf.org/html/rfc3056">RFC 3056</a>:
+ Connection of IPv6 Domains via IPv4 Clouds. Defines 6to4 tunneling and the
2002::/16 prefix
- \li RFC3849: IPv6 Address Prefix Reserved for Documentation. Defines the 2001:db8::/32
- prefix
+ \li <a href="http://tools.ietf.org/html/rfc3849">RFC 3849</a>:
+ IPv6 Address Prefix Reserved for Documentation. Defines the 2001:db8::/32 prefix
Here an overview of well-known prefixes:
<table class="senf">
<tr><th>Prefix</th> <th>Description</th> <th>Definition</th> <th>Note</th></tr>
- <tr><td><tt>::/96</tt></td> <td>IpV4 compatible IpV6 address</td> <td>RFC4291</td> <td>deprecated</td></tr>
- <tr><td><tt>::ffff:0:0/96</tt></td> <td>IpV6 mapped IpV4 address</td> <td>RFC4291</td> <td></td></tr>
+ <tr><td><tt>::/96</tt></td> <td>IPv4 compatible IPv6 address</td> <td>RFC4291</td> <td>deprecated</td></tr>
+ <tr><td><tt>::ffff:0:0/96</tt></td> <td>IPv6 mapped IPv4 address</td> <td>RFC4291</td> <td></td></tr>
<tr><td><tt>2000::/3</tt></td> <td>Global unicast addresses</td> <td>RFC3587</td> <td>only noted, not defined</td></tr>
<tr><td><tt>2001:db8::/32</tt></td> <td>Documentation-only prefix</td> <td>RFC3849</td> <td></td></tr>
<tr><td><tt>2002::/16</tt></td> <td>6to4 addressing</td> <td>RFC3056</td> <td></td></tr>
The INet6Address class is based on \c boost::array and is built as a fixed-size sequence of
16 bytes.
- \see CheckINet6Network Helper to check address against an arbitrary fixed network prefix
+ \see CheckINet6Network \n INet6Network
\ingroup addr_group
+
+ \implementation We awkwardly need to use static named constructors (<tt>from_</tt> members)
+ instead of ordinarily overloaded constructors for one simple reason: <tt>char *</tt>
+ doubles as string literal and as arbitrary data iterator. The iterator constructor can
+ therefore not be distinguished from initialization with a string literal. Therefore we
+ need to disambiguate using the named constructors.
*/
class INet6Address
: public boost::array<boost::uint8_t,16>,
- public ComparableSafeBool<INet6Address>
+ public comparable_safe_bool<INet6Address>
{
public:
///////////////////////////////////////////////////////////////////////////
// Types
- typedef boost::function<void (INet6Address const &)> Callback;
- ///< Callback for asynchronous from_string call
-
static INet6Address const None; ///< The empty (::0) address
static INet6Address const Loopback; ///< The loopback (::1) address
static INet6Address const AllNodes; ///< The 'all nodes' link-local multicast address
static INet6Address const AllRouters; ///< The 'all routers' link-local multicast address
- enum NoInit_t { noinit };
enum Resolve_t { ResolveINet6, ResolveINet4 };
/** \brief Possible scope values
List of all possible scope values. This list includes all scope values defined for
- multicast addresses in RFC4291. The values \ref LinkScope, \ref SiteScope and \ref
- GlobalScope are also used with unicast addresses.
+ multicast addresses in <a href="http://tools.ietf.org/html/rfc4291">RFC 4291</a>.
+ The values \ref LinkScope, \ref SiteScope and \ref GlobalScope are also used with
+ unicast addresses.
*/
enum ScopeId {
InterfaceScope = 1 /**< Interface only scope */
///\name Structors and default members
///@{
- explicit INet6Address(NoInit_t); ///< Construct uninitialized (!) address
+ explicit INet6Address(senf::NoInit_t); ///< Construct uninitialized (!) address
INet6Address(boost::uint16_t a0=0u, boost::uint16_t a1=0u, boost::uint16_t a2=0u,
boost::uint16_t a3=0u, boost::uint16_t a4=0u, boost::uint16_t a5=0u,
boost::uint16_t a6=0u, boost::uint16_t a7=0u);
\param[in] s Address literal or hostname
\param[in] resolve If this is set to \c ResolveINet4,
the call will additionally try to interpret \a s as
- an IpV4 address if no valid IpV6 address is
- found. The address will be returned as mapped IpV6
+ an IPv4 address if no valid IPv6 address is
+ found. The address will be returned as mapped IPv6
address. */
- static void from_string(std::string const & s, Callback const & cb,
- Resolve_t resolve = ResolveINet6);
- ///< Convert string to address (async/non-blocking)
- /**< This member works like
- from_string(std::string const &). However unlike
- from_string(std::string const &), this call will not
- block. Instead it will call \a cb passing the
- INet6Address instance as soon as the address has been
- resolved (which may be immediate if the address
- represents an IP literal). \par
- On error, the address passed to \a cb will be empty.
- \param[in] s Address literal or hostname
- \param[in] cb Callback to pass the address to
- \param[in] resolve If this is set to \c ResolveINet4,
- the call will additionally try to interpret \a s as
- an IpV4 address if no valid IpV6 address is
- found. The address will be returned as mapped IpV6
- address.
- \fixme Implement */
-
template <class InputIterator>
static INet6Address from_data(InputIterator i);
///< Construct address from 16 bytes of raw data
network byte order. */
static INet6Address from_inet4address(INet4Address addr);
- ///< Construct an IpV6-mapped IpV4 address
+ ///< Construct an IPv6-mapped IPv4 address
/**< This will construct an address of the form
<tt>::FFFF::w.x.y.z</tt> where <tt>w.x.y.z</tt> is
the INet4Address value. This kind of address is called
- an IpV6-mapped IpV4 address (see RFC4291). \par
- IpV4 compatible IpV6 addresses are not directly
+ an IPv6-mapped IPv4 address (see
+ <a href="http://tools.ietf.org/html/rfc4291">RFC 4291</a>).
+ \par
+ IPv4 compatible IPv6 addresses are not directly
supported, they are deprecated in the RFC. */
///@}
///////////////////////////////////////////////////////////////////////////
bool globalScope() const; ///< \c true, if address is global unicast or multicast
bool linkScope() const; ///< \c true, if address is link-local unicast or multicast
- INet4Address inet4address() const; ///< Return embedded IpV4 address
- /**< Returns the IpV4 address embedded within an IpV4
- compatible or IpV4 mapped unicast address. This address
- is given by the last 32 bits of the IpV6 address. \par
- The value returned is only a valid IpV4 address if
+ INet4Address inet4address() const; ///< Return embedded IPv4 address
+ /**< Returns the IPv4 address embedded within an IPv4
+ compatible or IPv4 mapped unicast address. This address
+ is given by the last 32 bits of the IPv6 address. \par
+ The value returned is only a valid IPv4 address if
either ipv4Compatible() or ipv4Mapped() return \c
true. */
- bool ipv4Compatible() const; ///< \c true, if address is IpV4 compatible
- /**< IpV4 compatible IpV6 addresses are deprecated. */
- bool ipv4Mapped() const; ///< \c true, if address is IpV4 mapped
+ bool ipv4Compatible() const; ///< \c true, if address is IPv4 compatible
+ /**< IPv4 compatible IPv6 addresses are deprecated. */
+ bool ipv4Mapped() const; ///< \c true, if address is IPv4 mapped
bool globalMulticastAddr() const; ///< \c true, if T bit is \e not set
/**< Any multicast address with a cleared T bit must be
- globally assigned. See RFC4291. */
+ globally assigned. See
+ <a href="http://tools.ietf.org/html/rfc4291">RFC 4291</a>. */
bool prefixMulticastAddr() const; ///< \c true, if P bit is set
- /**< In RFC4291, the P bit is specified as defining a
- unicast prefix based multicast address. See RFC3306. */
+ /**< In <a href="http://tools.ietf.org/html/rfc4291">RFC 4291</a>,
+ the P bit is specified as defining a
+ unicast prefix based multicast address. See
+ <a href="http://tools.ietf.org/html/rfc3306">RFC 3306</a>. */
bool embeddedRpAddr() const; ///< \c true, if R bit is set
- /** In RFC4291, the R bit is specified as defining a
- multicast address with embedded rendezvous point. See
- RFC3956. */
+ /**< In <a href="http://tools.ietf.org/html/rfc4291">RFC 4291</a>,
+ the R bit is specified as defining a multicast address
+ with embedded rendezvous point. See
+ <a href="http://tools.ietf.org/html/rfc3956">RFC 3956</a>. */
bool boolean_test() const; ///< \c true, if address != '::' (None)
///@}
- /** \brief Invalid IpV6 address syntax */
- struct SyntaxException : public std::exception
- { virtual char const * what() const throw() { return "Invalid IpV6 address syntax"; } };
+ /** \brief Base-class for INet6Address exceptions */
+ struct AddressException : public std::exception {};
+
+ /** \brief Invalid INet4 address syntax */
+ struct SyntaxException : public AddressException
+ { virtual char const * what() const throw()
+ { return "invalid INet6 address syntax"; } };
+
+ /** \brief Resolver failure */
+ struct UnknownHostnameException : public AddressException
+ { virtual char const * what() const throw()
+ { return "failed to resolve INet6 hostname"; } };
};
/** \brief Output INet6Address instance as it's string representation
*/
std::ostream & operator<<(std::ostream & os, INet6Address const & addr);
- /** \brief Check address against a fixed network prefix
+ /** \brief Check INet6Address against a fixed network prefix
+
+ This helper allows to easily and efficiently check an INet6Address against an arbitrary but
+ constant network prefix. It takes from 1 to 8 arguments for the network address and an
+ additional last argument providing the prefix length. So
+
+ \par ""
+ <tt>senf::CheckINet6Network<</tt> <i>addr_1</i> <tt>,</tt> <i>addr_2</i> <tt>,</tt>
+ ... <tt>,</tt> <i>prefix_len</i> <tt>></tt>
+
+ represents the network
+
+ \par ""
+ <i>addr_1</i> <tt>:</tt> <i>addr_2</i> <tt>:</tt> ... <tt>::/</tt> <i>prefix_len</i> .
+
+ The class exposes a single static member <tt>match(</tt> <i>addr</i> <tt>)</tt> which
+ matches the INet6Address \a addr against the prefix:
- This helper allows to easily and efficiently check an address against an arbitrary network
- prefix:
\code
if (senf::CheckINet6Network<0x2000u,0xDB8u,32u>::match(addr)) {
// 'addr' is within in the 2001:db8::/32 documentation-only network
}
\endcode
- The code generated by this call is highly optimized and as probably as efficient as it can
- get.
-
- \related INet6Address
+ The code generated by this call is highly optimized and probably as efficient as it can get.
*/
template <unsigned a0, unsigned a1, unsigned a2=0u, unsigned a3=0u, unsigned a4=0u,
unsigned a5=0u, unsigned a6=0u, unsigned a7=0u, unsigned a8=0u>
: public detail::CheckINet6Network_impl<a0,a1,a2,a3,a4,a5,a6,a7,a8>
{};
+ /** \brief IPv6 network prefix
+
+ This class represents an IPv6 network prefix in CIDR notation.
+ */
+ class INet6Network
+ : public boost::equality_comparable<INet6Network>,
+ public comparable_safe_bool<INet6Network>
+ {
+ public:
+ ///////////////////////////////////////////////////////////////////////////
+ ///\name Structors and default members
+ ///@{
+
+ INet6Network(); ///< Construct empty (::/0) network
+ INet6Network(INet6Address address, unsigned prefix_len);
+ ///< Construct network from given address and prefix length
+ explicit INet6Network(std::string s); ///< Construct network from CIDR notation
+
+ ///@}
+ ///////////////////////////////////////////////////////////////////////////
+
+ INet6Address const & address() const; ///< Get the network address
+ unsigned prefix_len() const; ///< Get the network prefix length
+
+ bool boolean_test() const; ///< \c true, if INet6Network is non-empty
+ bool operator==(INet6Network const & other) const;
+ ///< Compare two networks for equality
+
+ bool match(INet6Address addr) const; ///< \c true, if the network includes \a addr
+ bool match(INet6Network net) const; ///< \c true, if the network includes \a net
+ /**< The is true, if \a net is sub-network (or the same as)
+ \c this. */
+ INet6Address host(boost::uint64_t id); ///< Return the host with the given id
+ /**< Returns the host with the given number within the
+ network. This call replaces the lower 64 bits of the
+ network address with the given id. */
+
+ INet6Network subnet(boost::uint64_t net, unsigned prefix_len);
+ ///< Return the given subnet of \c this
+ /**< The returned INet6Network will be a subnet of \c this
+ with the given network number. The network number is
+ comprised by the bits above \a prefix_len:
+ \code
+ INet6Network("2001:db8::/32").subnet(0x12u,40u) == INet6Network("2001:db8:1200::/40")
+ INet6Network("2001:db8:1200::/40").subnet(0x2345,64u) == INet6Network("2001:db8:1200:2345::/64")
+ \endcode
+ \param[in] net network number
+ \param[in] prefix_len length of subnet prefix */
+
+ protected:
+
+ private:
+ unsigned prefix_len_;
+ INet6Address address_;
+ };
+
+ /** \brief Output INet6Network instance as it's string representation
+ \related INet6Network
+ */
+ std::ostream & operator<<(std::ostream & os, INet6Network const & addr);
}
///////////////////////////////hh.e////////////////////////////////////////
projects / senf.git / blobdiff