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rippled/beast/net/impl/IPAddress.cpp
Nicholas Dudfield 30648a1819 Fix IPAddress::V4::Proxy
2013-11-05 03:02:20 -08:00

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//------------------------------------------------------------------------------
/*
This file is part of Beast: https://github.com/vinniefalco/Beast
Copyright 2013, Vinnie Falco <vinnie.falco@gmail.com>
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
//==============================================================================
#include "../IPAddress.h"
namespace beast {
IPAddress::V4::V4 ()
: value (0)
{
}
IPAddress::V4::V4 (uint32 value_)
: value (value_)
{
}
IPAddress::V4::V4 (uint8 a, uint8 b, uint8 c, uint8 d)
: value ((a<<24)|(b<<16)|(c<<8)|d)
{
}
IPAddress::V4::V4 (V4 const& other)
: value (other.value)
{
}
IPAddress::V4& IPAddress::V4::operator= (V4 const& other)
{
value = other.value;
return *this;
}
IPAddress::V4 IPAddress::V4::localBroadcastAddress ()
{
return V4 (0xffffffff);
}
IPAddress::V4 IPAddress::V4::broadcastAddress () const
{
switch (getClass())
{
case 'A': return V4 ((value&0xff000000)|0x00ffffff);
case 'B': return V4 ((value&0xffff0000)|0x0000ffff);
case 'C': return V4 ((value&0xffffff00)|0x000000ff);
default:
case 'D':
bassertfalse;
break;
}
return V4();
}
char IPAddress::V4::getClass () const
{
static char const* table = "AAAABBCD";
return table[(value&0xE0000000)>>29];
}
bool IPAddress::V4::isPublic () const
{
return !isPrivate() && !isBroadcast() && !isMulticast();
}
bool IPAddress::V4::isPrivate () const
{
return
((value&0xff000000)==0x0a000000) || // Prefix /8, 10.##.#.#
((value&0xfff00000)==0xac100000) || // Prefix /12 172.16.#.# - 172.31.#.#
((value&0xffff0000)==0xc0a80000) || // Prefix /16 192.168.#.#
isLoopback();
}
bool IPAddress::V4::isBroadcast () const
{
return (value == broadcastAddress().value);
}
bool IPAddress::V4::isMulticast () const
{
return getClass() == 'D';
}
bool IPAddress::V4::isLoopback () const
{
return (value&0xff000000)==0x7f000000;
}
IPAddress::V4::Proxy <true> IPAddress::V4::operator[] (std::size_t index) const
{
switch (index)
{
default:
bassertfalse;
case 0: return Proxy <true> (24, &value);
case 1: return Proxy <true> (16, &value);
case 2: return Proxy <true> ( 8, &value);
case 3: return Proxy <true> ( 0, &value);
};
};
IPAddress::V4::Proxy <false> IPAddress::V4::operator[] (std::size_t index)
{
switch (index)
{
default:
bassertfalse;
case 0: return Proxy <false> (24, &value);
case 1: return Proxy <false> (16, &value);
case 2: return Proxy <false> ( 8, &value);
case 3: return Proxy <false> ( 0, &value);
};
};
std::string IPAddress::V4::to_string () const
{
std::string s;
s.reserve (15);
s.append (numberToString ((int)((*this)[0]))); s.push_back ('.');
s.append (numberToString ((int)((*this)[1]))); s.push_back ('.');
s.append (numberToString ((int)((*this)[2]))); s.push_back ('.');
s.append (numberToString ((int)((*this)[3])));
return s;
}
IPAddress::V4::operator std::string () const
{
return to_string();
}
//------------------------------------------------------------------------------
IPAddress::IPAddress ()
: m_type (none)
{
}
IPAddress::IPAddress (V4 const& v4, uint16 port)
: m_type (ipv4)
, m_port (port)
, m_v4 (v4)
{
}
IPAddress::IPAddress (V6 const& v6, uint16 port)
: m_type (ipv6)
, m_port (port)
, m_v6 (v6)
{
}
IPAddress::IPAddress (IPAddress const& other)
: m_type (other.m_type)
, m_port (other.m_port)
{
switch (m_type)
{
case ipv4: m_v4 = other.m_v4; break;
case ipv6: m_v6 = other.m_v6; break;
default:
case none:
break;
};
}
IPAddress& IPAddress::operator= (IPAddress const& other)
{
m_type = other.m_type;
m_port = other.m_port;
switch (m_type)
{
case ipv4: m_v4 = other.m_v4; break;
case ipv6: m_v6 = other.m_v6; break;
default:
case none:
break;
};
return *this;
}
IPAddress IPAddress::from_string (std::string const& s)
{
std::stringstream is (s);
IPAddress ep;
is >> ep;
if (! is.fail() && is.rdbuf()->in_avail() == 0)
return ep;
return IPAddress();
}
IPAddress& IPAddress::operator= (V4 const& address)
{
m_type = ipv4;
m_port = 0;
m_v4 = address;
return *this;
}
IPAddress& IPAddress::operator= (V6 const& address)
{
m_type = ipv6;
m_port = 0;
m_v6 = address;
return *this;
}
IPAddress IPAddress::withPort (uint16 port) const
{
switch (m_type)
{
case ipv4: return IPAddress (m_v4, port);
case ipv6: return IPAddress (m_v6, port);
default:
case none:
bassertfalse;
break;
};
return IPAddress();
}
bool IPAddress::empty () const
{
return m_type == none;
}
bool IPAddress::isNull () const
{
return empty ();
}
bool IPAddress::isNotNull () const
{
return ! empty ();
}
IPAddress::Type IPAddress::type () const
{
return m_type;
}
bool IPAddress::isV4 () const
{
return m_type == ipv4;
}
bool IPAddress::isV6 () const
{
return m_type == ipv6;
}
IPAddress::V4 const& IPAddress::v4 () const
{
return m_v4;
}
IPAddress::V6 const& IPAddress::v6 () const
{
return m_v6;
}
uint16 IPAddress::port () const
{
return m_port;
}
bool IPAddress::isPublic () const
{
switch (m_type)
{
case ipv4: return m_v4.isPublic();
case ipv6: return m_v6.isPublic();
default:
bassertfalse;
case none:
break;
};
return false;
}
bool IPAddress::isPrivate () const
{
switch (m_type)
{
case ipv4: return m_v4.isPrivate();
case ipv6: return m_v6.isPrivate();
default:
bassertfalse;
case none:
break;
};
return false;
}
bool IPAddress::isBroadcast () const
{
switch (m_type)
{
case ipv4: return m_v4.isBroadcast();
case ipv6: return m_v6.isBroadcast();
default:
bassertfalse;
case none:
break;
};
return false;
}
bool IPAddress::isMulticast () const
{
switch (m_type)
{
case ipv4: return m_v4.isMulticast();
case ipv6: return m_v6.isMulticast();
default:
bassertfalse;
case none:
break;
};
return false;
}
bool IPAddress::isLoopback () const
{
switch (m_type)
{
case ipv4: return m_v4.isLoopback();
case ipv6: return m_v6.isLoopback();
default:
bassertfalse;
case none:
break;
};
return false;
}
std::string IPAddress::to_string () const
{
switch (m_type)
{
case ipv4:
{
std::string s (m_v4.to_string());
if (m_port != 0)
{
s.append (":");
s.append (numberToString (m_port));
}
return s;
}
case ipv6:
return m_v6.to_string();
default:
case none:
bassertfalse;
break;
};
return std::string();
}
IPAddress::operator std::string () const
{
return to_string();
}
//------------------------------------------------------------------------------
namespace parse
{
/** Require and consume the specified character from the input.
@return `true` if the character matched.
*/
bool expect (std::istream& is, char v)
{
char c;
if (is.get(c) && v == c)
return true;
is.unget();
is.setstate (std::ios_base::failbit);
return false;
}
namespace detail
{
/** Used to disambiguate 8-bit integers from characters. */
template <typename IntType>
struct integer_holder
{
IntType* pi;
explicit integer_holder (IntType& i)
: pi (&i)
{
}
template <typename OtherIntType>
IntType& operator= (OtherIntType o) const
{
*pi = o;
return *pi;
}
};
/** Parse 8-bit unsigned integer. */
std::istream& operator>> (std::istream& is, integer_holder <uint8> const& i)
{
uint16 v;
is >> v;
if (! (v>=0 && v<=255))
{
is.setstate (std::ios_base::failbit);
return is;
}
i = uint8(v);
return is;
}
}
/** Free function for template argument deduction. */
template <typename IntType>
detail::integer_holder <IntType> integer (IntType& i)
{
return detail::integer_holder <IntType> (i);
}
}
/** Parse IPv4 address. */
std::istream& operator>> (std::istream &is, IPAddress::V4& addr)
{
uint8 octets [4];
is >> parse::integer (octets [0]);
for (int i = 1; i < 4; ++i)
{
if (!is || !parse::expect (is, '.'))
return is;
is >> parse::integer (octets [i]);
if (!is)
return is;
}
addr = IPAddress::V4 (octets[0], octets[1], octets[2], octets[3]);
return is;
}
/** Parse an IPAddress.
@note Currently only IPv4 addresses are supported.
*/
std::istream& operator>> (std::istream &is, IPAddress& ep)
{
IPAddress::V4 v4;
is >> v4;
if (is.fail())
return is;
if (is.rdbuf()->in_avail()>0)
{
char c;
is.get(c);
if (c != ':')
{
is.unget();
ep = IPAddress (v4);
return is;
}
uint16 port;
is >> port;
if (is.fail())
return is;
ep = IPAddress (v4, port);
}
else
{
ep = IPAddress (v4);
}
return is;
}
//------------------------------------------------------------------------------
IPAddress IPAddress::from_string_altform (std::string const& s)
{
// Accept the regular form if it parses
{
IPAddress ep (IPAddress::from_string (s));
if (! ep.empty())
return ep;
}
// Now try the alt form
std::stringstream is (s);
IPAddress::V4 v4;
is >> v4;
if (! is.fail())
{
IPAddress ep (v4);
if (is.rdbuf()->in_avail()>0)
{
if (! parse::expect (is, ' '))
return IPAddress();
while (is.rdbuf()->in_avail()>0)
{
char c;
is.get(c);
if (c != ' ')
{
is.unget();
break;
}
}
uint16 port;
is >> port;
if (is.fail())
return IPAddress();
return ep.withPort (port);
}
else
{
// Just an address with no port
return ep;
}
}
// Could be V6 here...
return IPAddress();
}
//------------------------------------------------------------------------------
int compare (IPAddress::V4 const& lhs, IPAddress::V4 const& rhs)
{
if (lhs.value < rhs.value)
return -1;
else if (lhs.value > rhs.value)
return 1;
return 0;
}
bool operator== (IPAddress::V4 const& lhs, IPAddress::V4 const& rhs) { return compare (lhs, rhs) == 0; }
bool operator!= (IPAddress::V4 const& lhs, IPAddress::V4 const& rhs) { return compare (lhs, rhs) != 0; }
bool operator< (IPAddress::V4 const& lhs, IPAddress::V4 const& rhs) { return compare (lhs, rhs) < 0; }
bool operator<= (IPAddress::V4 const& lhs, IPAddress::V4 const& rhs) { return compare (lhs, rhs) <= 0; }
bool operator> (IPAddress::V4 const& lhs, IPAddress::V4 const& rhs) { return compare (lhs, rhs) > 0; }
bool operator>= (IPAddress::V4 const& lhs, IPAddress::V4 const& rhs) { return compare (lhs, rhs) >= 0; }
static int type_compare (IPAddress const& lhs, IPAddress const& rhs)
{
if (lhs.type() < rhs.type())
return -1;
else if (lhs.type() > rhs.type())
return 1;
return 0;
}
int compare (IPAddress const& lhs, IPAddress const& rhs)
{
int const tc (type_compare (lhs, rhs));
if (tc < 0)
return -1;
else if (tc > 0)
return 1;
switch (lhs.type())
{
case IPAddress::none: return 0;
case IPAddress::ipv4: return compare (lhs.v4(), rhs.v4());
default:
case IPAddress::ipv6:
break;
};
bassertfalse;
return 0;
}
bool operator== (IPAddress const& lhs, IPAddress const& rhs) { return compare (lhs, rhs) == 0; }
bool operator!= (IPAddress const& lhs, IPAddress const& rhs) { return compare (lhs, rhs) != 0; }
bool operator< (IPAddress const& lhs, IPAddress const& rhs) { return compare (lhs, rhs) < 0; }
bool operator<= (IPAddress const& lhs, IPAddress const& rhs) { return compare (lhs, rhs) <= 0; }
bool operator> (IPAddress const& lhs, IPAddress const& rhs) { return compare (lhs, rhs) > 0; }
bool operator>= (IPAddress const& lhs, IPAddress const& rhs) { return compare (lhs, rhs) >= 0; }
std::ostream& operator<< (std::ostream &os, IPAddress::V4 const& addr)
{
os << addr.to_string();
return os;
}
std::ostream& operator<< (std::ostream &os, IPAddress::V6 const& addr)
{
os << addr.to_string();
return os;
}
std::ostream& operator<< (std::ostream &os, IPAddress const& ep)
{
os << ep.to_string();
return os;
}
//------------------------------------------------------------------------------
class IPAddressTests : public UnitTest
{
public:
bool parse (char const* text, IPAddress& ep)
{
std::string input (text);
std::istringstream stream (input);
stream >> ep;
return !stream.fail();
}
void shouldPass (char const* text)
{
IPAddress ep;
expect (parse (text, ep));
expect (ep.to_string() == std::string(text));
}
void shouldFail (char const* text)
{
IPAddress ep;
unexpected (parse (text, ep));
}
void testParse ()
{
beginTestCase ("parse");
shouldPass ("0.0.0.0");
shouldPass ("192.168.0.1");
shouldPass ("168.127.149.132");
shouldPass ("168.127.149.132:80");
shouldPass ("168.127.149.132:54321");
shouldFail ("");
shouldFail ("255");
shouldFail ("512");
shouldFail ("1.2.3.256");
shouldFail ("1.2.3:80");
}
void testV4Proxy ()
{
beginTestCase("v4 proxy");
IPAddress::V4 v4 (10, 0, 0, 1);
expect (v4[0]==10);
expect (v4[1]==0);
expect (v4[2]==0);
expect (v4[3]==1);
expect((!((0xff)<<16)) == 0x00000000);
expect((~((0xff)<<16)) == 0xff00ffff);
v4[1] = 10;
expect (v4[0]==10);
expect (v4[1]==10);
expect (v4[2]==0);
expect (v4[3]==1);
}
void testPrint ()
{
beginTestCase ("addresses");
IPAddress ep;
ep = IPAddress(IPAddress::V4(127,0,0,1)).withPort (80);
expect (!ep.isPublic());
expect ( ep.isPrivate());
expect (!ep.isBroadcast());
expect (!ep.isMulticast());
expect ( ep.isLoopback());
expect (ep.to_string() == "127.0.0.1:80");
ep = IPAddress::V4(10,0,0,1);
expect ( ep.v4().getClass() == 'A');
expect (!ep.isPublic());
expect ( ep.isPrivate());
expect (!ep.isBroadcast());
expect (!ep.isMulticast());
expect (!ep.isLoopback());
expect (ep.to_string() == "10.0.0.1");
ep = IPAddress::V4(166,78,151,147);
expect ( ep.isPublic());
expect (!ep.isPrivate());
expect (!ep.isBroadcast());
expect (!ep.isMulticast());
expect (!ep.isLoopback());
expect (ep.to_string() == "166.78.151.147");
}
void runTest ()
{
testPrint();
testParse();
testV4Proxy();
}
IPAddressTests () : UnitTest ("IPAddress", "beast")
{
}
};
static IPAddressTests ipEndpointTests;
}
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