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#include "ip.hpp"
// ip.cpp - Implementation of IP address functions.
//
// Copyright © 2013 Ben Longbons <b.r.longbons@gmail.com>
//
// This file is part of The Mana World (Athena server)
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
#include "../strings/xstring.hpp"
#include "../strings/vstring.hpp"
#include "../io/cxxstdio.hpp"
#include "../io/extract.hpp"
#include "../poison.hpp"
namespace tmwa
{
bool impl_extract(XString str, IP4Address *rv)
{
if (str.endswith('.'))
return false;
uint8_t buf[4];
if (extract(str, record<'.'>(&buf[0], &buf[1], &buf[2], &buf[3])))
{
*rv = IP4Address(buf);
return true;
}
return false;
}
bool impl_extract(XString str, IP4Mask *rv)
{
IP4Address a, m;
unsigned b;
XString l, r;
if (str.endswith('/'))
return false;
if (extract(str, record<'/'>(&l, &r)))
{
// a.b.c.d/e.f.g.h or a.b.c.d/n
if (!extract(l, &a))
return false;
if (extract(r, &m))
{
*rv = IP4Mask(a, m);
return true;
}
if (!extract(r, &b) || b > 32)
return false;
}
else
{
// a.b.c.d or a.b.c.d. or a.b.c. or a.b. or a.
if (extract(str, &a))
{
*rv = IP4Mask(a, IP4_BROADCAST);
return true;
}
if (!str.endswith('.'))
return false;
uint8_t d[4] {};
if (extract(str, record<'.'>(&d[0], &d[1], &d[2], &d[3])))
b = 32;
else if (extract(str, record<'.'>(&d[0], &d[1], &d[2])))
b = 24;
else if (extract(str, record<'.'>(&d[0], &d[1])))
b = 16;
else if (extract(str, record<'.'>(&d[0])))
b = 8;
else
return false;
a = IP4Address(d);
}
// a is set; need to construct m from b
if (b == 0)
m = IP4Address();
else if (b == 32)
m = IP4_BROADCAST;
else
{
uint32_t s = -1;
s <<= (32 - b);
m = IP4Address({
static_cast<uint8_t>(s >> 24),
static_cast<uint8_t>(s >> 16),
static_cast<uint8_t>(s >> 8),
static_cast<uint8_t>(s >> 0),
});
}
*rv = IP4Mask(a, m);
return true;
}
VString<15> convert_for_printf(IP4Address a_)
{
const uint8_t *a = a_.bytes();
return STRNPRINTF(16, "%hhu.%hhu.%hhu.%hhu"_fmt, a[0], a[1], a[2], a[3]);
}
VString<31> convert_for_printf(IP4Mask a)
{
return STRNPRINTF(32, "%s/%s"_fmt,
a.addr(), a.mask());
}
} // namespace tmwa
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