mirror of
https://github.com/electronicarts/CnC_Renegade.git
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Initial commit of Command & Conquer Renegade source code.
This commit is contained in:
LFeenanEA
@@ -0,0 +1,488 @@
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/*
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** Command & Conquer Renegade(tm)
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** Copyright 2025 Electronic Arts Inc.
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**
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** This program is free software: you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation, either version 3 of the License, or
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** (at your option) any later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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//
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// Filename: nicenum.cpp
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// Author: Tom Spencer-Smith
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// Date: Dec 1999
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// Description:
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//
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#include "nicenum.h"
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#include <winsock.h>
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#include <stdio.h>
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#include "wwdebug.h"
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#include "netutil.h"
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#include "useroptions.h"
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#include "GameSpy_QnR.h"
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//
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// Class statics
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//
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ULONG cNicEnum::NicList[];
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USHORT cNicEnum::NumNics = 0;
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ULONG cNicEnum::GSNicList[];
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USHORT cNicEnum::NumGSNics = 0;
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//----------------------------------------------------------------------------------
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void
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cNicEnum::Init
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(
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void
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)
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{
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WWDEBUG_SAY(("cNicEnum::Init\n"));
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WSADATA wsa_data;
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int startup_rc = ::WSAStartup(MAKEWORD(1, 1), &wsa_data);
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if (startup_rc != 0)
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{
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WWDEBUG_SAY((" WSAStartup failed!\n"));
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return;
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}
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//
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// Retrieve list of nic's
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//
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ULONG local_addresses[MAX_NICS];
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ULONG num_addresses = Enumerate_Nics(local_addresses, MAX_NICS);
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WWASSERT(num_addresses <= MAX_NICS);
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WWDEBUG_SAY((" Found %d NIC(s)\n", num_addresses));
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USHORT index = 0;
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USHORT class_1 = 0;
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USHORT class_2 = 0;
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//
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// First, extract the non-internet addressable nicks, ordered on general usage.
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//
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ULONG lan_addresses[MAX_NICS];
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ULONG num_lan_addresses = 0;
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//
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// First, scan for 10.*.*.* addresses
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//
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for (index = 0; index < num_addresses; index++)
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{
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class_1 = (::ntohl(local_addresses[index]) & 0xff000000) >> 24;
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if (class_1 == 10)
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{
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lan_addresses[num_lan_addresses++] = local_addresses[index];
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local_addresses[index] = 0;
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}
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}
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//
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// Next, scan for 192.168.*.* addresses
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//
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for (index = 0; index < num_addresses; index++)
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{
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class_1 = (::ntohl(local_addresses[index]) & 0xff000000) >> 24;
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class_2 = (::ntohl(local_addresses[index]) & 0x00ff0000) >> 16;
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if (class_1 == 192 && class_2 == 168)
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{
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lan_addresses[num_lan_addresses++] = local_addresses[index];
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local_addresses[index] = 0;
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}
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}
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//
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// Next, scan for 172.16-31.*.* addresses
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//
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for (index = 0; index < num_addresses; index++)
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{
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class_1 = (::ntohl(local_addresses[index]) & 0xff000000) >> 24;
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class_2 = (::ntohl(local_addresses[index]) & 0x00ff0000) >> 16;
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if (class_1 == 172 && class_2 >= 16 && class_2 <= 31)
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{
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lan_addresses[num_lan_addresses++] = local_addresses[index];
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local_addresses[index] = 0;
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}
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}
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//
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// Finally, scan for 169.254.*.* addresses (IP autoconfiguration)
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//
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for (index = 0; index < num_addresses; index++)
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{
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class_1 = (::ntohl(local_addresses[index]) & 0xff000000) >> 24;
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class_2 = (::ntohl(local_addresses[index]) & 0x00ff0000) >> 16;
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if (class_1 == 169 && class_2 == 254)
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{
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lan_addresses[num_lan_addresses++] = local_addresses[index];
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local_addresses[index] = 0;
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}
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}
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WWDEBUG_SAY((" Of which %d are non-internet addressable.\n", num_lan_addresses));
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//
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// Next, copy the Internet addressable addresses. Weed out localhost and multicast
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// addresses.
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//
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ULONG internet_addresses[MAX_NICS];
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ULONG num_internet_addresses = 0;
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for (index = 0; index < num_addresses; index++)
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{
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if (local_addresses[index] != 0)
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{
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class_1 = (::ntohl(local_addresses[index]) & 0xff000000) >> 24;
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if (class_1 != 127 && class_1 != 224)
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{
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internet_addresses[num_internet_addresses++] = local_addresses[index];
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local_addresses[index] = 0;
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}
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}
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}
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//
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// Now build the LAN and GameSpy NIC lists. They contain the same entries.
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// The only difference is that the LAN list puts the non-internet addressable
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// NIC's first, the GameSpy list puts them last.
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//
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NumNics = 0;
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NumGSNics = 0;
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for (index = 0; index < num_lan_addresses; index++)
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{
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NicList[NumNics++] = lan_addresses[index];
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}
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for (index = 0; index < num_internet_addresses; index++)
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{
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NicList[NumNics++] = internet_addresses[index];
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}
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for (index = 0; index < num_internet_addresses; index++)
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{
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GSNicList[NumGSNics++] = internet_addresses[index];
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}
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for (index = 0; index < num_lan_addresses; index++)
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{
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GSNicList[NumGSNics++] = lan_addresses[index];
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}
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WWASSERT(NumNics == NumGSNics);
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//
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// Initialize or update PreferredLanNic if required.
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//
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bool is_nic_valid = false;
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for (index = 0; index < NumNics; index++)
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{
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if ((ULONG) cUserOptions::PreferredLanNic.Get() == NicList[index])
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{
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is_nic_valid = true;
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break;
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}
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}
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if (!is_nic_valid)
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{
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if (NumNics > 0)
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{
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cUserOptions::PreferredLanNic.Set(NicList[0]);
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}
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else
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{
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cUserOptions::PreferredLanNic.Set(0);
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}
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}
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//
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// Initialize or update PreferredGameSpyNic if required.
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//
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is_nic_valid = false;
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for (index = 0; index < NumGSNics; index++)
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{
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if ((ULONG) cUserOptions::PreferredGameSpyNic.Get() == GSNicList[index])
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{
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is_nic_valid = true;
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break;
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}
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}
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if (!is_nic_valid)
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{
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if (NumGSNics > 0)
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{
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cUserOptions::PreferredGameSpyNic.Set(GSNicList[0]);
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}
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else
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{
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cUserOptions::PreferredGameSpyNic.Set(0);
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}
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}
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WWDEBUG_SAY((" PreferredLanNic is %u (%s)\n",
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(ULONG) cUserOptions::PreferredLanNic.Get(),
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cNetUtil::Address_To_String(cUserOptions::PreferredLanNic.Get())));
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WWDEBUG_SAY((" PreferredGameSpyNic is %u (%s)\n",
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(ULONG) cUserOptions::PreferredGameSpyNic.Get(),
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cNetUtil::Address_To_String(cUserOptions::PreferredGameSpyNic.Get())));
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int cleanup_rc = ::WSACleanup();
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WWASSERT(cleanup_rc != SOCKET_ERROR);
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}
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//---------------------------------------------------------------------------
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ULONG
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cNicEnum::Enumerate_Nics
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(
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ULONG * addresses,
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ULONG max_nics
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)
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{
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WWASSERT(addresses != NULL);
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WWASSERT(max_nics > 0);
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WWDEBUG_SAY(("cNicEnum::Enumerate_Nics\n"));
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//
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// Get the local hostname
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//
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char local_host_name[300];
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int gethostname_rc = ::gethostname(local_host_name, sizeof(local_host_name));
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WWASSERT(gethostname_rc != SOCKET_ERROR);
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//
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// Resolve hostname for local adapter addresses.
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// This does a DNS lookup (name resolution)
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//
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LPHOSTENT p_hostent = ::gethostbyname(local_host_name);
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if (p_hostent == NULL)
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{
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DIE;
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}
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ULONG num_addresses = 0;
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while (num_addresses < max_nics && p_hostent->h_addr_list[num_addresses] != NULL)
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{
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IN_ADDR in_addr;
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::memcpy(&in_addr, p_hostent->h_addr_list[num_addresses], sizeof(in_addr));
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addresses[num_addresses] = in_addr.s_addr;
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WWDEBUG_SAY((" NIC: %s\n", cNetUtil::Address_To_String(addresses[num_addresses])));
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num_addresses++;
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}
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return num_addresses;
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}
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/*
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void
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cNicEnum::Init
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(
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void
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)
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{
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WWDEBUG_SAY(("cNicEnum::Init\n"));
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WSADATA wsa_data;
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int startup_rc = ::WSAStartup(MAKEWORD(1, 1), &wsa_data);
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if (startup_rc != 0)
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{
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WWDEBUG_SAY((" WSAStartup failed!\n"));
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return;
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}
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//
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// Retrieve list of nic's
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//
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ULONG local_addresses[MAX_NICS];
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ULONG num_addresses = Enumerate_Nics(local_addresses, MAX_NICS);
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WWASSERT(num_addresses <= MAX_NICS);
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WWDEBUG_SAY((" Found %d NIC(s)\n", num_addresses));
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//
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// We are going to discard anything that is internet addressable.
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// The non-internet-addressable NIC's are:
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// 10.*.*.*
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// 192.168.*.*
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// 172.16-31.*.*
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// We will order these as above to promote the more common choice.
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//
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USHORT index = 0;
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USHORT class_1 = 0;
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USHORT class_2 = 0;
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NumNics = 0;
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NumGSNics = 0;
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//
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// Create a seperate list of GameSpy compatible NIC's that includes
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// local and internet addressable
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//
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// Don't add the following interfaces to the list.
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// 127.* (localhost)
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// 224.* (multicast)
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//
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for (index = 0; index < num_addresses; index++)
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{
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class_1 = (::ntohl(local_addresses[index]) & 0xff000000) >> 24;
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if (class_1 != 127 && class_1 != 224)
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{
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GSNicList[NumGSNics++] = local_addresses[index];
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}
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}
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//
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// First, scan for 10.*.*.* addresses
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//
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for (index = 0; index < num_addresses; index++)
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{
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class_1 = (::ntohl(local_addresses[index]) & 0xff000000) >> 24;
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if (class_1 == 10)
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{
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NicList[NumNics++] = local_addresses[index];
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}
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}
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//
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// Next, scan for 192.168.*.* addresses
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//
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for (index = 0; index < num_addresses; index++)
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{
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class_1 = (::ntohl(local_addresses[index]) & 0xff000000) >> 24;
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class_2 = (::ntohl(local_addresses[index]) & 0x00ff0000) >> 16;
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if (class_1 == 192 && class_2 == 168)
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{
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NicList[NumNics++] = local_addresses[index];
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}
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}
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//
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// Finally, scan for 172.16-31.*.* addresses
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//
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for (index = 0; index < num_addresses; index++)
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{
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class_1 = (::ntohl(local_addresses[index]) & 0xff000000) >> 24;
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class_2 = (::ntohl(local_addresses[index]) & 0x00ff0000) >> 16;
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if (class_1 == 172 && class_2 >= 16 && class_2 <= 31)
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{
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NicList[NumNics++] = local_addresses[index];
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}
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}
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WWDEBUG_SAY((" Of which %d are non-internet addressable.\n", NumNics));
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//
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// Initialize or update PreferredLanNic if required.
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//
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bool is_nic_valid = false;
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for (index = 0; index < NumNics; index++)
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{
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if ((ULONG) cUserOptions::PreferredLanNic.Get() == NicList[index])
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{
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is_nic_valid = true;
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break;
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}
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}
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if (!is_nic_valid)
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{
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if (NumNics > 0)
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{
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cUserOptions::PreferredLanNic.Set(NicList[0]);
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}
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else
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{
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cUserOptions::PreferredLanNic.Set(0);
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}
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}
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is_nic_valid = false;
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for (index = 0; index < NumGSNics; index++)
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{
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if ((ULONG) cUserOptions::PreferredGameSpyNic.Get() == GSNicList[index])
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{
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is_nic_valid = true;
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break;
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}
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}
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if (!is_nic_valid)
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{
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if (NumGSNics > 0)
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{
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cUserOptions::PreferredGameSpyNic.Set(GSNicList[0]);
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}
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else
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{
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cUserOptions::PreferredGameSpyNic.Set(0);
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}
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}
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WWDEBUG_SAY((" PreferredLanNic is %u (%s)\n",
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(ULONG) cUserOptions::PreferredLanNic.Get(),
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cNetUtil::Address_To_String(cUserOptions::PreferredLanNic.Get())));
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WWDEBUG_SAY((" PreferredGameSpyNic is %u (%s)\n",
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(ULONG) cUserOptions::PreferredGameSpyNic.Get(),
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cNetUtil::Address_To_String(cUserOptions::PreferredGameSpyNic.Get())));
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int cleanup_rc = ::WSACleanup();
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WWASSERT(cleanup_rc != SOCKET_ERROR);
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}
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*/
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