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Make loginserver intelligently determine if the client is requesting from a RFC 1918 network instead of using a config string match

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Akkadius
2019-07-05 03:38:12 -05:00
parent 2c922876a9
commit feea52f79e
8 changed files with 155 additions and 52 deletions
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common/ip_util.cpp
+72
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/**
* EQEmulator: Everquest Server Emulator
* Copyright (C) 2001-2019 EQEmulator Development Team (https://github.com/EQEmu/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; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY except by those people which sell it, which
* are required to give you total support for your newly bought product;
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "ip_util.h"
/**
* @param ip
* @return
*/
uint32_t IpUtil::IPToUInt(const std::string &ip)
{
int a, b, c, d;
uint32_t addr = 0;
if (sscanf(ip.c_str(), "%d.%d.%d.%d", &a, &b, &c, &d) != 4) {
return 0;
}
addr = a << 24;
addr |= b << 16;
addr |= c << 8;
addr |= d;
return addr;
}
/**
* @param ip
* @param network
* @param mask
* @return
*/
bool IpUtil::IsIpInRange(const std::string &ip, const std::string &network, const std::string &mask)
{
uint32_t ip_addr = IpUtil::IPToUInt(ip);
uint32_t network_addr = IpUtil::IPToUInt(network);
uint32_t mask_addr = IpUtil::IPToUInt(mask);
uint32_t net_lower = (network_addr & mask_addr);
uint32_t net_upper = (net_lower | (~mask_addr));
return ip_addr >= net_lower && ip_addr <= net_upper;
}
/**
* @param ip
* @return
*/
bool IpUtil::IsIpInPrivateRfc1918(const std::string &ip)
{
return (
IpUtil::IsIpInRange(ip, "10.0.0.0", "255.0.0.0") ||
IpUtil::IsIpInRange(ip, "172.16.0.0", "255.240.0.0") ||
IpUtil::IsIpInRange(ip, "192.168.0.0", "255.255.0.0")
);
}