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utp_packedsockaddr.cpp
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utp_packedsockaddr.cpp
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// vim:set ts=4 sw=4 ai:
/*
* Copyright (c) 2010-2013 BitTorrent, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <string.h>
#include <assert.h>
#include <stdio.h>
#include "utp_types.h"
#include "utp_hash.h"
#include "utp_packedsockaddr.h"
#include "libutp_inet_ntop.h"
byte PackedSockAddr::get_family() const
{
#if defined(__sh__)
return ((_sin6d[0] == 0) && (_sin6d[1] == 0) && (_sin6d[2] == htonl(0xffff)) != 0) ?
AF_INET : AF_INET6;
#else
return (IN6_IS_ADDR_V4MAPPED(&_in._in6addr) != 0) ? AF_INET : AF_INET6;
#endif // defined(__sh__)
}
bool PackedSockAddr::operator==(const PackedSockAddr& rhs) const
{
if (&rhs == this)
return true;
if (_port != rhs._port)
return false;
return memcmp(_sin6, rhs._sin6, sizeof(_sin6)) == 0;
}
bool PackedSockAddr::operator!=(const PackedSockAddr& rhs) const
{
return !(*this == rhs);
}
uint32 PackedSockAddr::compute_hash() const {
return utp_hash_mem(&_in, sizeof(_in)) ^ _port;
}
void PackedSockAddr::set(const SOCKADDR_STORAGE* sa, socklen_t len)
{
if (sa->ss_family == AF_INET) {
assert(len >= sizeof(sockaddr_in));
const sockaddr_in *sin = (sockaddr_in*)sa;
_sin6w[0] = 0;
_sin6w[1] = 0;
_sin6w[2] = 0;
_sin6w[3] = 0;
_sin6w[4] = 0;
_sin6w[5] = 0xffff;
_sin4 = sin->sin_addr.s_addr;
_port = ntohs(sin->sin_port);
} else {
assert(len >= sizeof(sockaddr_in6));
const sockaddr_in6 *sin6 = (sockaddr_in6*)sa;
_in._in6addr = sin6->sin6_addr;
_port = ntohs(sin6->sin6_port);
}
}
PackedSockAddr::PackedSockAddr(const SOCKADDR_STORAGE* sa, socklen_t len)
{
set(sa, len);
}
PackedSockAddr::PackedSockAddr(void)
{
SOCKADDR_STORAGE sa;
socklen_t len = sizeof(SOCKADDR_STORAGE);
memset(&sa, 0, len);
sa.ss_family = AF_INET;
set(&sa, len);
}
SOCKADDR_STORAGE PackedSockAddr::get_sockaddr_storage(socklen_t *len = NULL) const
{
SOCKADDR_STORAGE sa;
const byte family = get_family();
if (family == AF_INET) {
sockaddr_in *sin = (sockaddr_in*)&sa;
if (len) *len = sizeof(sockaddr_in);
memset(sin, 0, sizeof(sockaddr_in));
sin->sin_family = family;
sin->sin_port = htons(_port);
sin->sin_addr.s_addr = _sin4;
} else {
sockaddr_in6 *sin6 = (sockaddr_in6*)&sa;
memset(sin6, 0, sizeof(sockaddr_in6));
if (len) *len = sizeof(sockaddr_in6);
sin6->sin6_family = family;
sin6->sin6_addr = _in._in6addr;
sin6->sin6_port = htons(_port);
}
return sa;
}
// #define addrfmt(x, s) x.fmt(s, sizeof(s))
cstr PackedSockAddr::fmt(str s, size_t len) const
{
memset(s, 0, len);
const byte family = get_family();
str i;
if (family == AF_INET) {
INET_NTOP(family, (uint32*)&_sin4, s, len);
i = s;
while (*++i) {}
} else {
i = s;
*i++ = '[';
INET_NTOP(family, (in6_addr*)&_in._in6addr, i, len-1);
while (*++i) {}
*i++ = ']';
}
snprintf(i, len - (i-s), ":%u", _port);
return s;
}