1305 lines
39 KiB
C++
1305 lines
39 KiB
C++
/*
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Copyright (C) 1996-2001 Id Software, Inc.
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Copyright (C) 2010-2014 QuakeSpasm developers
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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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.
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See the GNU General Public License for more details.
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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, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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// This is enables a simple IP banning mechanism
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#define BAN_TEST
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#include "q_stdinc.hpp"
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#include "arch_def.hpp"
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#include "net_sys.hpp"
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#include "quakedef.hpp"
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#include "net_defs.hpp"
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#include "net_dgrm.hpp"
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#include <cstring>
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// these two macros are to make the code more readable
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#define sfunc net_landrivers[sock->landriver]
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#define dfunc net_landrivers[net_landriverlevel]
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static int net_landriverlevel;
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/* statistic counters */
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static int packetsSent = 0;
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static int packetsReSent = 0;
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static int packetsReceived = 0;
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static int receivedDuplicateCount = 0;
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static int shortPacketCount = 0;
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static int droppedDatagrams;
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static struct {
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unsigned int length;
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unsigned int sequence;
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byte data[MAX_DATAGRAM];
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} packetBuffer;
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static int myDriverLevel;
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extern bool m_return_onerror;
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extern char m_return_reason[32];
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static char *StrAddr(struct qsockaddr *addr) {
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static char buf[34];
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byte *p = (byte *) addr;
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int n;
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for (n = 0; n < 16; n++)
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sprintf(buf + n * 2, "%02x", *p++);
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return buf;
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}
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#ifdef BAN_TEST
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static struct in_addr banAddr;
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static struct in_addr banMask;
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static void NET_Ban_f(void) {
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char addrStr[32];
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char maskStr[32];
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void (*print_fn)(const char *fmt, ...) FUNCP_PRINTF(1, 2);
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if (command::last_source == command::source::command) {
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if (!sv.active) {
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command::forward_to_server();
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return;
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}
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print_fn = console::info;
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} else {
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if (pr_global_struct->deathmatch)
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return;
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print_fn = SV_ClientPrintf;
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}
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switch (command::argc()) {
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case 1:
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if (banAddr.s_addr != INADDR_ANY) {
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std::strcpy(addrStr, inet_ntoa(banAddr));
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std::strcpy(maskStr, inet_ntoa(banMask));
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print_fn("Banning %s [%s]\n", addrStr, maskStr);
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} else
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print_fn("Banning not active\n");
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break;
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case 2:
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if (q_strcasecmp(command::argv(1)->c_str(), "off") == 0)
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banAddr.s_addr = INADDR_ANY;
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else
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banAddr.s_addr = inet_addr(command::argv(1)->c_str());
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banMask.s_addr = INADDR_NONE;
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break;
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case 3:
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banAddr.s_addr = inet_addr(command::argv(1)->c_str());
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banMask.s_addr = inet_addr(command::argv(2)->c_str());
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break;
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default:
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print_fn("BAN ip_address [mask]\n");
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break;
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}
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}
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#endif // BAN_TEST
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int Datagram_SendMessage(qsocket_t *sock, net::msg &msg) {
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unsigned int packetLen;
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unsigned int dataLen;
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unsigned int eom;
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#ifdef DEBUG
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if (data->cursize == 0)
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Sys_Error("Datagram_SendMessage: zero length message");
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if (data->cursize > NET_MAXMESSAGE)
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Sys_Error("Datagram_SendMessage: message too big: %u", data->cursize);
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if (sock->canSend == false)
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Sys_Error("SendMessage: called with canSend == false");
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#endif
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std::memcpy(sock->sendMessage, msg.data(), msg.size());
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sock->sendMessageLength = msg.size();
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if (msg.size() <= MAX_DATAGRAM) {
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dataLen = msg.size();
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eom = NETFLAG_EOM;
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} else {
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dataLen = MAX_DATAGRAM;
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eom = 0;
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}
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packetLen = NET_HEADERSIZE + dataLen;
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packetBuffer.length = BigLong(packetLen | (NETFLAG_DATA | eom));
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packetBuffer.sequence = BigLong(sock->sendSequence++);
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std::memcpy(packetBuffer.data, sock->sendMessage, dataLen);
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sock->canSend = false;
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if (sfunc.Write(sock->socket, (byte *) &packetBuffer, packetLen, &sock->addr) == -1)
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return -1;
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sock->lastSendTime = net_time;
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packetsSent++;
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return 1;
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}
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static int SendMessageNext(qsocket_t *sock) {
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unsigned int packetLen;
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unsigned int dataLen;
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unsigned int eom;
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if (sock->sendMessageLength <= MAX_DATAGRAM) {
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dataLen = sock->sendMessageLength;
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eom = NETFLAG_EOM;
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} else {
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dataLen = MAX_DATAGRAM;
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eom = 0;
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}
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packetLen = NET_HEADERSIZE + dataLen;
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packetBuffer.length = BigLong(packetLen | (NETFLAG_DATA | eom));
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packetBuffer.sequence = BigLong(sock->sendSequence++);
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std::memcpy(packetBuffer.data, sock->sendMessage, dataLen);
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sock->sendNext = false;
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if (sfunc.Write(sock->socket, (byte *) &packetBuffer, packetLen, &sock->addr) == -1)
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return -1;
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sock->lastSendTime = net_time;
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packetsSent++;
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return 1;
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}
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static int ReSendMessage(qsocket_t *sock) {
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unsigned int packetLen;
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unsigned int dataLen;
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unsigned int eom;
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if (sock->sendMessageLength <= MAX_DATAGRAM) {
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dataLen = sock->sendMessageLength;
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eom = NETFLAG_EOM;
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} else {
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dataLen = MAX_DATAGRAM;
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eom = 0;
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}
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packetLen = NET_HEADERSIZE + dataLen;
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packetBuffer.length = BigLong(packetLen | (NETFLAG_DATA | eom));
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packetBuffer.sequence = BigLong(sock->sendSequence - 1);
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std::memcpy(packetBuffer.data, sock->sendMessage, dataLen);
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sock->sendNext = false;
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if (sfunc.Write(sock->socket, (byte *) &packetBuffer, packetLen, &sock->addr) == -1)
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return -1;
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sock->lastSendTime = net_time;
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packetsReSent++;
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return 1;
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}
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bool Datagram_CanSendMessage(qsocket_t *sock) {
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if (sock->sendNext)
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SendMessageNext(sock);
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return sock->canSend;
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}
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bool Datagram_CanSendUnreliableMessage(qsocket_t *sock) {
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return true;
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}
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int Datagram_SendUnreliableMessage(qsocket_t *sock, net::msg &msg) {
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int packetLen;
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#ifdef DEBUG
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if (data->cursize == 0)
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Sys_Error("Datagram_SendUnreliableMessage: zero length message");
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if (data->cursize > MAX_DATAGRAM)
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Sys_Error("Datagram_SendUnreliableMessage: message too big: %u", data->cursize);
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#endif
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packetLen = NET_HEADERSIZE + msg.size();
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packetBuffer.length = BigLong(packetLen | NETFLAG_UNRELIABLE);
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packetBuffer.sequence = BigLong(sock->unreliableSendSequence++);
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std::memcpy(packetBuffer.data, msg.data(), msg.size());
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if (sfunc.Write(sock->socket, (byte *) &packetBuffer, packetLen, &sock->addr) == -1)
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return -1;
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packetsSent++;
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return 1;
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}
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int Datagram_GetMessage(qsocket_t *sock) {
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unsigned int length;
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unsigned int flags;
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int ret = 0;
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struct qsockaddr readaddr;
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unsigned int sequence;
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unsigned int count;
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if (!sock->canSend)
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if ((net_time - sock->lastSendTime) > 1.0)
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ReSendMessage(sock);
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while (1) {
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length = (unsigned int) sfunc.Read(sock->socket, (byte *) &packetBuffer,
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NET_DATAGRAMSIZE, &readaddr);
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// if ((rand() & 255) > 220)
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// continue;
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if (length == 0)
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break;
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if (length == (unsigned int) -1) {
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console::info("Read error\n");
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return -1;
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}
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if (sfunc.AddrCompare(&readaddr, &sock->addr) != 0) {
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console::info("Forged packet received\n");
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console::info("Expected: %s\n", StrAddr(&sock->addr));
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console::info("Received: %s\n", StrAddr(&readaddr));
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continue;
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}
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if (length < NET_HEADERSIZE) {
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shortPacketCount++;
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continue;
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}
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length = BigLong(packetBuffer.length);
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flags = length & (~NETFLAG_LENGTH_MASK);
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length &= NETFLAG_LENGTH_MASK;
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if (flags & NETFLAG_CTL)
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continue;
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sequence = BigLong(packetBuffer.sequence);
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packetsReceived++;
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if (flags & NETFLAG_UNRELIABLE) {
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if (sequence < sock->unreliableReceiveSequence) {
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console::debug("Got a stale datagram\n");
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ret = 0;
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break;
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}
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if (sequence != sock->unreliableReceiveSequence) {
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count = sequence - sock->unreliableReceiveSequence;
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droppedDatagrams += count;
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console::debug("Dropped %u datagram(s)\n", count);
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}
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sock->unreliableReceiveSequence = sequence + 1;
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length -= NET_HEADERSIZE;
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net_message.clear();
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net_message.write(packetBuffer.data, length);
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ret = 2;
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break;
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}
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if (flags & NETFLAG_ACK) {
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if (sequence != (sock->sendSequence - 1)) {
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console::debug("Stale ACK received\n");
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continue;
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}
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if (sequence == sock->ackSequence) {
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sock->ackSequence++;
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if (sock->ackSequence != sock->sendSequence)
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console::debug("ack sequencing error\n");
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} else {
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console::debug("Duplicate ACK received\n");
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continue;
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}
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sock->sendMessageLength -= MAX_DATAGRAM;
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if (sock->sendMessageLength > 0) {
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memmove(sock->sendMessage, sock->sendMessage + MAX_DATAGRAM, sock->sendMessageLength);
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sock->sendNext = true;
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} else {
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sock->sendMessageLength = 0;
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sock->canSend = true;
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}
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continue;
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}
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if (flags & NETFLAG_DATA) {
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packetBuffer.length = BigLong(NET_HEADERSIZE | NETFLAG_ACK);
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packetBuffer.sequence = BigLong(sequence);
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sfunc.Write(sock->socket, (byte *) &packetBuffer, NET_HEADERSIZE, &readaddr);
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if (sequence != sock->receiveSequence) {
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receivedDuplicateCount++;
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continue;
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}
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sock->receiveSequence++;
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length -= NET_HEADERSIZE;
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if (flags & NETFLAG_EOM) {
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net_message.clear();
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net_message.write(sock->receiveMessage, sock->receiveMessageLength);
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net_message.write(packetBuffer.data, length);
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sock->receiveMessageLength = 0;
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ret = 1;
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break;
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}
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std::memcpy(sock->receiveMessage + sock->receiveMessageLength, packetBuffer.data, length);
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sock->receiveMessageLength += length;
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continue;
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}
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}
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if (sock->sendNext)
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SendMessageNext(sock);
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return ret;
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}
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static void PrintStats(qsocket_t *s) {
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console::info("canSend = %4u \n", s->canSend);
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console::info("sendSeq = %4u ", s->sendSequence);
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console::info("recvSeq = %4u \n", s->receiveSequence);
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console::info("\n");
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}
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static void NET_Stats_f(void) {
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qsocket_t *s;
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if (command::argc() == 1) {
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console::info("unreliable messages sent = %i\n", unreliableMessagesSent);
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console::info("unreliable messages recv = %i\n", unreliableMessagesReceived);
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console::info("reliable messages sent = %i\n", messagesSent);
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console::info("reliable messages received = %i\n", messagesReceived);
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console::info("packetsSent = %i\n", packetsSent);
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console::info("packetsReSent = %i\n", packetsReSent);
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console::info("packetsReceived = %i\n", packetsReceived);
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console::info("receivedDuplicateCount = %i\n", receivedDuplicateCount);
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console::info("shortPacketCount = %i\n", shortPacketCount);
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console::info("droppedDatagrams = %i\n", droppedDatagrams);
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} else if (std::strcmp(command::argv(1)->c_str(), "*") == 0) {
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for (s = net_activeSockets; s; s = s->next)
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PrintStats(s);
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for (s = net_freeSockets; s; s = s->next)
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PrintStats(s);
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} else {
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for (s = net_activeSockets; s; s = s->next) {
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if (q_strcasecmp(command::argv(1)->c_str(), s->address) == 0)
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break;
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}
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if (s == NULL) {
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for (s = net_freeSockets; s; s = s->next) {
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if (q_strcasecmp(command::argv(1)->c_str(), s->address) == 0)
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break;
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}
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}
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if (s == NULL)
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return;
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PrintStats(s);
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}
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}
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// recognize ip:port (based on ProQuake)
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static const char *Strip_Port(const char *host) {
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static char noport[MAX_QPATH];
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/* array size as in Host_Connect_f() */
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char *p;
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int port;
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if (!host || !*host)
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return host;
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q_strlcpy(noport, host, sizeof(noport));
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if ((p = std::strrchr(noport, ':')) == NULL)
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return host;
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*p++ = '\0';
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port = std::atoi(p);
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if (port > 0 && port < 65536 && port != net_hostport) {
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net_hostport = port;
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console::info("Port set to %d\n", net_hostport);
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}
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return noport;
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}
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static bool testInProgress = false;
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static int testPollCount;
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static int testDriver;
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static sys_socket_t testSocket;
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static void Test_Poll(void *);
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static PollProcedure testPollProcedure = {NULL, 0.0, Test_Poll};
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static void Test_Poll(void *unused) {
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struct qsockaddr clientaddr;
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int control;
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int len;
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char name[32];
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char address[64];
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int colors;
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int frags;
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int connectTime;
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net_landriverlevel = testDriver;
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while (1) {
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const auto buf = new std::uint8_t[MAX_DATAGRAM];
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len = dfunc.Read(testSocket, &buf[0], MAX_DATAGRAM, &clientaddr);
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if (len < (int) sizeof(int)) {
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delete []buf;
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break;
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}
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net_message.write(buf, len);
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delete []buf;
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|
|
|
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net_message.begin_reading();
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control = BigLong(*((int *) net_message.data()));
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net_message.read_long();
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if (control == -1)
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break;
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if ((control & (~NETFLAG_LENGTH_MASK)) != (int) NETFLAG_CTL)
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break;
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if ((control & NETFLAG_LENGTH_MASK) != len)
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break;
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|
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if (net_message.read_byte().value() != CCREP_PLAYER_INFO)
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Sys_Error("Unexpected response to Player Info request\n");
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net_message.read_byte().value(); /* playerNumber */
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std::strcpy(name, net_message.read_string().value().c_str());
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colors = net_message.read_long().value();
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frags = net_message.read_long().value();
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connectTime = net_message.read_long().value();
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std::strcpy(address, net_message.read_string().value().c_str());
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console::info("%s\n frags:%3i colors:%d %d time:%d\n %s\n", name, frags, colors >> 4, colors & 0x0f,
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connectTime / 60, address);
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}
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|
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testPollCount--;
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if (testPollCount) {
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SchedulePollProcedure(&testPollProcedure, 0.1);
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} else {
|
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dfunc.Close_Socket(testSocket);
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testInProgress = false;
|
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}
|
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}
|
|
|
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static void Test_f(void) {
|
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const char *host;
|
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int n;
|
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int maxusers = MAX_SCOREBOARD;
|
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struct qsockaddr sendaddr;
|
|
|
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if (testInProgress)
|
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return;
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|
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host = Strip_Port(command::argv(1).value_or("").c_str());
|
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|
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if (host && hostCacheCount) {
|
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for (n = 0; n < hostCacheCount; n++) {
|
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if (q_strcasecmp(host, hostcache[n].name) == 0) {
|
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if (hostcache[n].driver != myDriverLevel)
|
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continue;
|
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net_landriverlevel = hostcache[n].ldriver;
|
|
maxusers = hostcache[n].maxusers;
|
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std::memcpy(&sendaddr, &hostcache[n].addr, sizeof(struct qsockaddr));
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break;
|
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}
|
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}
|
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|
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if (n < hostCacheCount)
|
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goto JustDoIt;
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|
}
|
|
|
|
for (net_landriverlevel = 0; net_landriverlevel < net_numlandrivers; net_landriverlevel++) {
|
|
if (!net_landrivers[net_landriverlevel].initialized)
|
|
continue;
|
|
|
|
// see if we can resolve the host name
|
|
if (dfunc.GetAddrFromName(host, &sendaddr) != -1)
|
|
break;
|
|
}
|
|
|
|
if (net_landriverlevel == net_numlandrivers) {
|
|
console::info("Could not resolve %s\n", host);
|
|
return;
|
|
}
|
|
|
|
JustDoIt:
|
|
testSocket = dfunc.Open_Socket(0);
|
|
if (testSocket == INVALID_SOCKET)
|
|
return;
|
|
|
|
testInProgress = true;
|
|
testPollCount = 20;
|
|
testDriver = net_landriverlevel;
|
|
|
|
for (n = 0; n < maxusers; n++) {
|
|
net_message.clear();
|
|
// save space for the header, filled in later
|
|
net_message.write_long(0);
|
|
net_message.write_byte(CCREQ_PLAYER_INFO);
|
|
net_message.write_byte(n);
|
|
*((int *) net_message.data()) = BigLong(NETFLAG_CTL | (net_message.size() & NETFLAG_LENGTH_MASK));
|
|
dfunc.Write(testSocket, net_message.data(), net_message.size(), &sendaddr);
|
|
}
|
|
net_message.clear();
|
|
SchedulePollProcedure(&testPollProcedure, 0.1);
|
|
}
|
|
|
|
|
|
static bool test2InProgress = false;
|
|
static int test2Driver;
|
|
static sys_socket_t test2Socket;
|
|
|
|
static void Test2_Poll(void *);
|
|
|
|
static PollProcedure test2PollProcedure = {NULL, 0.0, Test2_Poll};
|
|
|
|
static void Test2_Poll(void *unused) {
|
|
struct qsockaddr clientaddr;
|
|
int control;
|
|
int len;
|
|
char name[256];
|
|
char value[256];
|
|
|
|
net_landriverlevel = test2Driver;
|
|
name[0] = 0;
|
|
|
|
auto buf = new std::uint8_t[MAX_DATAGRAM];
|
|
len = dfunc.Read(test2Socket, &buf[0], MAX_DATAGRAM, &clientaddr);
|
|
if (len < (int) sizeof(int)) {
|
|
delete []buf;
|
|
goto Reschedule;
|
|
}
|
|
net_message.write(buf, len);
|
|
delete []buf;
|
|
|
|
|
|
net_message.begin_reading();
|
|
control = BigLong(*((int *) net_message.data()));
|
|
net_message.read_long();
|
|
if (control == -1)
|
|
goto Error;
|
|
if ((control & (~NETFLAG_LENGTH_MASK)) != (int) NETFLAG_CTL)
|
|
goto Error;
|
|
if ((control & NETFLAG_LENGTH_MASK) != len)
|
|
goto Error;
|
|
|
|
if (net_message.read_byte().value() != CCREP_RULE_INFO)
|
|
goto Error;
|
|
|
|
std::strcpy(name, net_message.read_string().value().c_str());
|
|
if (name[0] == 0)
|
|
goto Done;
|
|
std::strcpy(value, net_message.read_string().value().c_str());
|
|
|
|
console::info("%-16.16s %-16.16s\n", name, value);
|
|
|
|
net_message.clear();
|
|
// save space for the header, filled in later
|
|
net_message.write_long(0);
|
|
net_message.write_byte(CCREQ_RULE_INFO);
|
|
net_message.write_string(name);
|
|
*((int *) net_message.data()) = BigLong(NETFLAG_CTL | (net_message.size() & NETFLAG_LENGTH_MASK));
|
|
dfunc.Write(test2Socket, net_message.data(), net_message.size(), &clientaddr);
|
|
net_message.clear();
|
|
|
|
Reschedule:
|
|
SchedulePollProcedure(&test2PollProcedure, 0.05);
|
|
return;
|
|
|
|
Error:
|
|
console::info("Unexpected response to Rule Info request\n");
|
|
Done:
|
|
dfunc.Close_Socket(test2Socket);
|
|
test2InProgress = false;
|
|
return;
|
|
}
|
|
|
|
static void Test2_f(void) {
|
|
const char *host;
|
|
int n;
|
|
struct qsockaddr sendaddr;
|
|
|
|
if (test2InProgress)
|
|
return;
|
|
|
|
host = Strip_Port(command::argv(1).value_or("").c_str());
|
|
|
|
if (host && hostCacheCount) {
|
|
for (n = 0; n < hostCacheCount; n++) {
|
|
if (q_strcasecmp(host, hostcache[n].name) == 0) {
|
|
if (hostcache[n].driver != myDriverLevel)
|
|
continue;
|
|
net_landriverlevel = hostcache[n].ldriver;
|
|
std::memcpy(&sendaddr, &hostcache[n].addr, sizeof(struct qsockaddr));
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (n < hostCacheCount)
|
|
goto JustDoIt;
|
|
}
|
|
|
|
for (net_landriverlevel = 0; net_landriverlevel < net_numlandrivers; net_landriverlevel++) {
|
|
if (!net_landrivers[net_landriverlevel].initialized)
|
|
continue;
|
|
|
|
// see if we can resolve the host name
|
|
if (dfunc.GetAddrFromName(host, &sendaddr) != -1)
|
|
break;
|
|
}
|
|
|
|
if (net_landriverlevel == net_numlandrivers) {
|
|
console::info("Could not resolve %s\n", host);
|
|
return;
|
|
}
|
|
|
|
JustDoIt:
|
|
test2Socket = dfunc.Open_Socket(0);
|
|
if (test2Socket == INVALID_SOCKET)
|
|
return;
|
|
|
|
test2InProgress = true;
|
|
test2Driver = net_landriverlevel;
|
|
|
|
net_message.clear();
|
|
// save space for the header, filled in later
|
|
net_message.write_long(0);
|
|
net_message.write_byte(CCREQ_RULE_INFO);
|
|
net_message.write_string("");
|
|
*((int *) net_message.data()) = BigLong(NETFLAG_CTL | (net_message.size() & NETFLAG_LENGTH_MASK));
|
|
dfunc.Write(test2Socket, net_message.data(), net_message.size(), &sendaddr);
|
|
net_message.clear();
|
|
SchedulePollProcedure(&test2PollProcedure, 0.05);
|
|
}
|
|
|
|
|
|
int Datagram_Init(void) {
|
|
int i, num_inited;
|
|
sys_socket_t csock;
|
|
|
|
#ifdef BAN_TEST
|
|
banAddr.s_addr = INADDR_ANY;
|
|
banMask.s_addr = INADDR_NONE;
|
|
#endif
|
|
myDriverLevel = net_driverlevel;
|
|
|
|
command::add("net_stats", NET_Stats_f);
|
|
|
|
if (safemode || common::check_param("-nolan").has_value())
|
|
return -1;
|
|
|
|
num_inited = 0;
|
|
for (i = 0; i < net_numlandrivers; i++) {
|
|
csock = net_landrivers[i].Init();
|
|
if (csock == INVALID_SOCKET)
|
|
continue;
|
|
net_landrivers[i].initialized = true;
|
|
net_landrivers[i].controlSock = csock;
|
|
num_inited++;
|
|
}
|
|
|
|
if (num_inited == 0)
|
|
return -1;
|
|
|
|
#ifdef BAN_TEST
|
|
command::add("ban", NET_Ban_f);
|
|
#endif
|
|
command::add("test", Test_f);
|
|
command::add("test2", Test2_f);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
void Datagram_Shutdown(void) {
|
|
int i;
|
|
|
|
//
|
|
// shutdown the lan drivers
|
|
//
|
|
for (i = 0; i < net_numlandrivers; i++) {
|
|
if (net_landrivers[i].initialized) {
|
|
net_landrivers[i].Shutdown();
|
|
net_landrivers[i].initialized = false;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void Datagram_Close(qsocket_t *sock) {
|
|
sfunc.Close_Socket(sock->socket);
|
|
}
|
|
|
|
|
|
void Datagram_Listen(bool state) {
|
|
int i;
|
|
|
|
for (i = 0; i < net_numlandrivers; i++) {
|
|
if (net_landrivers[i].initialized)
|
|
net_landrivers[i].Listen(state);
|
|
}
|
|
}
|
|
|
|
|
|
static qsocket_t *_Datagram_CheckNewConnections(void) {
|
|
struct qsockaddr clientaddr;
|
|
struct qsockaddr newaddr;
|
|
sys_socket_t newsock;
|
|
sys_socket_t acceptsock;
|
|
qsocket_t *sock;
|
|
qsocket_t *s;
|
|
int len;
|
|
int command;
|
|
int control;
|
|
int ret;
|
|
|
|
acceptsock = dfunc.CheckNewConnections();
|
|
if (acceptsock == INVALID_SOCKET)
|
|
return NULL;
|
|
|
|
net_message.clear();
|
|
|
|
auto buf = new byte[MAX_DATAGRAM];
|
|
len = dfunc.Read(acceptsock, &buf[0], MAX_DATAGRAM, &clientaddr);
|
|
if (len < (int) sizeof(int)) {
|
|
delete []buf;
|
|
return nullptr;
|
|
}
|
|
net_message.write(buf, len);
|
|
delete []buf;
|
|
|
|
net_message.begin_reading();
|
|
control = BigLong(*((int *) net_message.data()));
|
|
net_message.read_long();
|
|
if (control == -1)
|
|
return NULL;
|
|
if ((control & (~NETFLAG_LENGTH_MASK)) != (int) NETFLAG_CTL)
|
|
return NULL;
|
|
if ((control & NETFLAG_LENGTH_MASK) != len)
|
|
return NULL;
|
|
|
|
command = net_message.read_byte().value();
|
|
if (command == CCREQ_SERVER_INFO) {
|
|
if (std::strcmp(net_message.read_string().value().c_str(), "QUAKE") != 0)
|
|
return NULL;
|
|
|
|
net_message.clear();
|
|
// save space for the header, filled in later
|
|
net_message.write_long(0);
|
|
net_message.write_byte(CCREP_SERVER_INFO);
|
|
dfunc.GetSocketAddr(acceptsock, &newaddr);
|
|
net_message.write_string(dfunc.AddrToString(&newaddr));
|
|
net_message.write_string(hostname.string);
|
|
net_message.write_string(sv.name);
|
|
net_message.write_byte(net_activeconnections);
|
|
net_message.write_byte(svs.maxclients);
|
|
net_message.write_byte(NET_PROTOCOL_VERSION);
|
|
*((int *) net_message.data()) = BigLong(NETFLAG_CTL | (net_message.size() & NETFLAG_LENGTH_MASK));
|
|
dfunc.Write(acceptsock, net_message.data(), net_message.size(), &clientaddr);
|
|
net_message.clear();
|
|
return NULL;
|
|
}
|
|
|
|
if (command == CCREQ_PLAYER_INFO) {
|
|
int playerNumber;
|
|
int activeNumber;
|
|
int clientNumber;
|
|
client_t *client;
|
|
|
|
playerNumber = net_message.read_byte().value();
|
|
activeNumber = -1;
|
|
|
|
for (clientNumber = 0, client = svs.clients; clientNumber < svs.maxclients; clientNumber++, client++) {
|
|
if (client->active) {
|
|
activeNumber++;
|
|
if (activeNumber == playerNumber)
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (clientNumber == svs.maxclients)
|
|
return NULL;
|
|
|
|
net_message.clear();
|
|
// save space for the header, filled in later
|
|
net_message.write_long(0);
|
|
net_message.write_byte(CCREP_PLAYER_INFO);
|
|
net_message.write_byte(playerNumber);
|
|
net_message.write_string(client->name);
|
|
net_message.write_long(client->colors);
|
|
net_message.write_long((int) client->edict->v.frags);
|
|
net_message.write_long((int) (net_time - client->netconnection->connecttime));
|
|
net_message.write_string(client->netconnection->address);
|
|
*((int *) net_message.data()) = BigLong(NETFLAG_CTL | (net_message.size() & NETFLAG_LENGTH_MASK));
|
|
dfunc.Write(acceptsock, net_message.data(), net_message.size(), &clientaddr);
|
|
net_message.clear();
|
|
|
|
return NULL;
|
|
}
|
|
|
|
if (command == CCREQ_RULE_INFO) {
|
|
// find the search start location
|
|
auto prevCvarName = net_message.read_string().value();
|
|
auto var = convar::find_var_after(prevCvarName, std::nullopt);
|
|
|
|
// send the response
|
|
net_message.clear();
|
|
// save space for the header, filled in later
|
|
net_message.write_long(0);
|
|
net_message.write_byte(CCREP_RULE_INFO);
|
|
if (var) {
|
|
net_message.write_string(var.value()->name.c_str());
|
|
net_message.write_string(var.value()->string);
|
|
}
|
|
*((int *) net_message.data()) = BigLong(NETFLAG_CTL | (net_message.size() & NETFLAG_LENGTH_MASK));
|
|
dfunc.Write(acceptsock, net_message.data(), net_message.size(), &clientaddr);
|
|
net_message.clear();
|
|
|
|
return NULL;
|
|
}
|
|
|
|
if (command != CCREQ_CONNECT)
|
|
return NULL;
|
|
|
|
if (std::strcmp(net_message.read_string().value().c_str(), "QUAKE") != 0)
|
|
return NULL;
|
|
|
|
if (net_message.read_byte().value() != NET_PROTOCOL_VERSION) {
|
|
net_message.clear();
|
|
// save space for the header, filled in later
|
|
net_message.write_long(0);
|
|
net_message.write_byte(CCREP_REJECT);
|
|
net_message.write_string("Incompatible version.\n");
|
|
*((int *) net_message.data()) = BigLong(NETFLAG_CTL | (net_message.size() & NETFLAG_LENGTH_MASK));
|
|
dfunc.Write(acceptsock, net_message.data(), net_message.size(), &clientaddr);
|
|
net_message.clear();
|
|
return NULL;
|
|
}
|
|
|
|
#ifdef BAN_TEST
|
|
// check for a ban
|
|
if (clientaddr.qsa_family == AF_INET) {
|
|
in_addr_t testAddr;
|
|
testAddr = ((struct sockaddr_in *) &clientaddr)->sin_addr.s_addr;
|
|
if ((testAddr & banMask.s_addr) == banAddr.s_addr) {
|
|
net_message.clear();
|
|
// save space for the header, filled in later
|
|
net_message.write_long(0);
|
|
net_message.write_byte(CCREP_REJECT);
|
|
net_message.write_string("You have been banned.\n");
|
|
*((int *) net_message.data()) = BigLong(NETFLAG_CTL | (net_message.size() & NETFLAG_LENGTH_MASK));
|
|
dfunc.Write(acceptsock, net_message.data(), net_message.size(), &clientaddr);
|
|
net_message.clear();
|
|
return NULL;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
// see if this guy is already connected
|
|
for (s = net_activeSockets; s; s = s->next) {
|
|
if (s->driver != net_driverlevel)
|
|
continue;
|
|
ret = dfunc.AddrCompare(&clientaddr, &s->addr);
|
|
if (ret >= 0) {
|
|
// is this a duplicate connection reqeust?
|
|
if (ret == 0 && net_time - s->connecttime < 2.0) {
|
|
// yes, so send a duplicate reply
|
|
net_message.clear();
|
|
// save space for the header, filled in later
|
|
net_message.write_long(0);
|
|
net_message.write_byte(CCREP_ACCEPT);
|
|
dfunc.GetSocketAddr(s->socket, &newaddr);
|
|
net_message.write_long(dfunc.GetSocketPort(&newaddr));
|
|
*((int *) net_message.data()) = BigLong(NETFLAG_CTL | (net_message.size() & NETFLAG_LENGTH_MASK));
|
|
dfunc.Write(acceptsock, net_message.data(), net_message.size(), &clientaddr);
|
|
net_message.clear();
|
|
return NULL;
|
|
}
|
|
// it's somebody coming back in from a crash/disconnect
|
|
// so close the old qsocket and let their retry get them back in
|
|
NET_Close(s);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
// allocate a QSocket
|
|
sock = NET_NewQSocket();
|
|
if (sock == NULL) // no room; try to let him know
|
|
{
|
|
net_message.clear();
|
|
// save space for the header, filled in later
|
|
net_message.write_long(0);
|
|
net_message.write_byte(CCREP_REJECT);
|
|
net_message.write_string("Server is full.\n");
|
|
*((int *) net_message.data()) = BigLong(NETFLAG_CTL | (net_message.size() & NETFLAG_LENGTH_MASK));
|
|
dfunc.Write(acceptsock, net_message.data(), net_message.size(), &clientaddr);
|
|
net_message.clear();
|
|
return NULL;
|
|
}
|
|
|
|
// allocate a network socket
|
|
newsock = dfunc.Open_Socket(0);
|
|
if (newsock == INVALID_SOCKET) {
|
|
NET_FreeQSocket(sock);
|
|
return NULL;
|
|
}
|
|
|
|
// connect to the client
|
|
if (dfunc.Connect(newsock, &clientaddr) == -1) {
|
|
dfunc.Close_Socket(newsock);
|
|
NET_FreeQSocket(sock);
|
|
return NULL;
|
|
}
|
|
|
|
// everything is allocated, just fill in the details
|
|
sock->socket = newsock;
|
|
sock->landriver = net_landriverlevel;
|
|
sock->addr = clientaddr;
|
|
std::strcpy(sock->address, dfunc.AddrToString(&clientaddr));
|
|
|
|
// send him back the info about the server connection he has been allocated
|
|
net_message.clear();
|
|
// save space for the header, filled in later
|
|
net_message.write_long(0);
|
|
net_message.write_byte(CCREP_ACCEPT);
|
|
dfunc.GetSocketAddr(newsock, &newaddr);
|
|
net_message.write_long(dfunc.GetSocketPort(&newaddr));
|
|
// MSG_WriteString(&net_message, dfunc.AddrToString(&newaddr));
|
|
*((int *) net_message.data()) = BigLong(NETFLAG_CTL | (net_message.size() & NETFLAG_LENGTH_MASK));
|
|
dfunc.Write(acceptsock, net_message.data(), net_message.size(), &clientaddr);
|
|
net_message.clear();
|
|
|
|
return sock;
|
|
}
|
|
|
|
qsocket_t *Datagram_CheckNewConnections(void) {
|
|
qsocket_t *ret = NULL;
|
|
|
|
for (net_landriverlevel = 0; net_landriverlevel < net_numlandrivers; net_landriverlevel++) {
|
|
if (net_landrivers[net_landriverlevel].initialized) {
|
|
if ((ret = _Datagram_CheckNewConnections()) != NULL)
|
|
break;
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
static void _Datagram_SearchForHosts(bool xmit) {
|
|
int ret;
|
|
int n;
|
|
int i;
|
|
struct qsockaddr readaddr;
|
|
struct qsockaddr myaddr;
|
|
int control;
|
|
|
|
dfunc.GetSocketAddr(dfunc.controlSock, &myaddr);
|
|
if (xmit) {
|
|
net_message.clear();
|
|
// save space for the header, filled in later
|
|
net_message.write_long(0);
|
|
net_message.write_byte(CCREQ_SERVER_INFO);
|
|
net_message.write_string("QUAKE");
|
|
net_message.write_byte(NET_PROTOCOL_VERSION);
|
|
*((int *) net_message.data()) = BigLong(NETFLAG_CTL | (net_message.size() & NETFLAG_LENGTH_MASK));
|
|
dfunc.Broadcast(dfunc.controlSock, net_message.data(), net_message.size());
|
|
net_message.clear();
|
|
}
|
|
|
|
auto buf = new std::uint8_t[MAX_DATAGRAM];
|
|
while ((ret = dfunc.Read(dfunc.controlSock, &buf[0], MAX_DATAGRAM, &readaddr)) > 0) {
|
|
if (ret < (int) sizeof(int))
|
|
continue;
|
|
net_message.write(buf, ret);
|
|
|
|
// don't answer our own query
|
|
if (dfunc.AddrCompare(&readaddr, &myaddr) >= 0)
|
|
continue;
|
|
|
|
// is the cache full?
|
|
if (hostCacheCount == HOSTCACHESIZE)
|
|
continue;
|
|
|
|
net_message.begin_reading();
|
|
control = BigLong(*((int *) net_message.data()));
|
|
net_message.read_long();
|
|
if (control == -1)
|
|
continue;
|
|
if ((control & (~NETFLAG_LENGTH_MASK)) != (int) NETFLAG_CTL)
|
|
continue;
|
|
if ((control & NETFLAG_LENGTH_MASK) != ret)
|
|
continue;
|
|
|
|
if (net_message.read_byte().value() != CCREP_SERVER_INFO)
|
|
continue;
|
|
|
|
dfunc.GetAddrFromName(net_message.read_string().value().c_str(), &readaddr);
|
|
// search the cache for this server
|
|
for (n = 0; n < hostCacheCount; n++) {
|
|
if (dfunc.AddrCompare(&readaddr, &hostcache[n].addr) == 0)
|
|
break;
|
|
}
|
|
|
|
// is it already there?
|
|
if (n < hostCacheCount)
|
|
continue;
|
|
|
|
// add it
|
|
hostCacheCount++;
|
|
std::strcpy(hostcache[n].name, net_message.read_string().value().c_str());
|
|
std::strcpy(hostcache[n].map, net_message.read_string().value().c_str());
|
|
hostcache[n].users = net_message.read_byte().value();
|
|
hostcache[n].maxusers = net_message.read_byte().value();
|
|
if (net_message.read_byte().value() != NET_PROTOCOL_VERSION) {
|
|
std::strcpy(hostcache[n].cname, hostcache[n].name);
|
|
hostcache[n].cname[14] = 0;
|
|
std::strcpy(hostcache[n].name, "*");
|
|
std::strcat(hostcache[n].name, hostcache[n].cname);
|
|
}
|
|
std::memcpy(&hostcache[n].addr, &readaddr, sizeof(struct qsockaddr));
|
|
hostcache[n].driver = net_driverlevel;
|
|
hostcache[n].ldriver = net_landriverlevel;
|
|
std::strcpy(hostcache[n].cname, dfunc.AddrToString(&readaddr));
|
|
|
|
// check for a name conflict
|
|
for (i = 0; i < hostCacheCount; i++) {
|
|
if (i == n)
|
|
continue;
|
|
if (q_strcasecmp(hostcache[n].name, hostcache[i].name) == 0) {
|
|
i = std::strlen(hostcache[n].name);
|
|
if (i < 15 && hostcache[n].name[i - 1] > '8') {
|
|
hostcache[n].name[i] = '0';
|
|
hostcache[n].name[i + 1] = 0;
|
|
} else
|
|
hostcache[n].name[i - 1]++;
|
|
|
|
i = -1;
|
|
}
|
|
}
|
|
}
|
|
delete []buf;
|
|
}
|
|
|
|
void Datagram_SearchForHosts(bool xmit) {
|
|
for (net_landriverlevel = 0; net_landriverlevel < net_numlandrivers; net_landriverlevel++) {
|
|
if (hostCacheCount == HOSTCACHESIZE)
|
|
break;
|
|
if (net_landrivers[net_landriverlevel].initialized)
|
|
_Datagram_SearchForHosts(xmit);
|
|
}
|
|
}
|
|
|
|
|
|
static qsocket_t *_Datagram_Connect(const char *host) {
|
|
struct qsockaddr sendaddr;
|
|
struct qsockaddr readaddr;
|
|
qsocket_t *sock;
|
|
sys_socket_t newsock;
|
|
int ret;
|
|
int reps;
|
|
double start_time;
|
|
int control;
|
|
std::string reason;
|
|
|
|
// see if we can resolve the host name
|
|
if (dfunc.GetAddrFromName(host, &sendaddr) == -1) {
|
|
console::info("Could not resolve %s\n", host);
|
|
return NULL;
|
|
}
|
|
|
|
newsock = dfunc.Open_Socket(0);
|
|
if (newsock == INVALID_SOCKET)
|
|
return NULL;
|
|
|
|
sock = NET_NewQSocket();
|
|
if (sock == NULL)
|
|
goto ErrorReturn2;
|
|
sock->socket = newsock;
|
|
sock->landriver = net_landriverlevel;
|
|
|
|
// connect to the host
|
|
if (dfunc.Connect(newsock, &sendaddr) == -1)
|
|
goto ErrorReturn;
|
|
|
|
// send the connection request
|
|
console::info("trying...\n");
|
|
SCR_UpdateScreen();
|
|
start_time = net_time;
|
|
|
|
for (reps = 0; reps < 3; reps++) {
|
|
net_message.clear();
|
|
// save space for the header, filled in later
|
|
net_message.write_long(0);
|
|
net_message.write_byte(CCREQ_CONNECT);
|
|
net_message.write_string("QUAKE");
|
|
net_message.write_byte(NET_PROTOCOL_VERSION);
|
|
*((int *) net_message.data()) = BigLong(NETFLAG_CTL | (net_message.size() & NETFLAG_LENGTH_MASK));
|
|
dfunc.Write(newsock, net_message.data(), net_message.size(), &sendaddr);
|
|
net_message.clear();
|
|
auto buf = new std::uint8_t[MAX_DATAGRAM];
|
|
do {
|
|
ret = dfunc.Read(newsock, &buf[0], MAX_DATAGRAM, &readaddr);
|
|
// if we got something, validate it
|
|
if (ret > 0) {
|
|
// is it from the right place?
|
|
if (sfunc.AddrCompare(&readaddr, &sendaddr) != 0) {
|
|
console::info("wrong reply address\n");
|
|
console::info("Expected: %s | %s\n", dfunc.AddrToString(&sendaddr), StrAddr(&sendaddr));
|
|
console::info("Received: %s | %s\n", dfunc.AddrToString(&readaddr), StrAddr(&readaddr));
|
|
SCR_UpdateScreen();
|
|
ret = 0;
|
|
continue;
|
|
}
|
|
|
|
if (ret < (int) sizeof(int)) {
|
|
ret = 0;
|
|
continue;
|
|
}
|
|
|
|
net_message.write(buf, ret);
|
|
net_message.begin_reading();
|
|
|
|
control = BigLong(*((int *) net_message.data()));
|
|
net_message.read_long();
|
|
if (control == -1) {
|
|
ret = 0;
|
|
continue;
|
|
}
|
|
if ((control & (~NETFLAG_LENGTH_MASK)) != (int) NETFLAG_CTL) {
|
|
ret = 0;
|
|
continue;
|
|
}
|
|
if ((control & NETFLAG_LENGTH_MASK) != ret) {
|
|
ret = 0;
|
|
continue;
|
|
}
|
|
}
|
|
} while (ret == 0 && (SetNetTime() - start_time) < 2.5);
|
|
delete []buf;
|
|
|
|
if (ret)
|
|
break;
|
|
|
|
console::info("still trying...\n");
|
|
SCR_UpdateScreen();
|
|
start_time = SetNetTime();
|
|
}
|
|
|
|
if (ret == 0) {
|
|
reason = "No Response";
|
|
console::info("%s\n", reason.c_str());
|
|
std::strcpy(m_return_reason, reason.c_str());
|
|
goto ErrorReturn;
|
|
}
|
|
|
|
if (ret == -1) {
|
|
reason = "Network Error";
|
|
console::info("%s\n", reason.c_str());
|
|
std::strcpy(m_return_reason, reason.c_str());
|
|
goto ErrorReturn;
|
|
}
|
|
|
|
ret = net_message.read_byte().value();
|
|
if (ret == CCREP_REJECT) {
|
|
reason = net_message.read_string().value();
|
|
console::info("%s\n", reason.c_str());
|
|
q_strlcpy(m_return_reason, reason.c_str(), sizeof(m_return_reason));
|
|
goto ErrorReturn;
|
|
}
|
|
|
|
if (ret == CCREP_ACCEPT) {
|
|
std::memcpy(&sock->addr, &sendaddr, sizeof(struct qsockaddr));
|
|
dfunc.SetSocketPort(&sock->addr, net_message.read_long().value());
|
|
} else {
|
|
reason = "Bad Response";
|
|
console::info("%s\n", reason.c_str());
|
|
std::strcpy(m_return_reason, reason.c_str());
|
|
goto ErrorReturn;
|
|
}
|
|
|
|
dfunc.GetNameFromAddr(&sendaddr, sock->address);
|
|
|
|
console::info("Connection accepted\n");
|
|
sock->lastMessageTime = SetNetTime();
|
|
|
|
// switch the connection to the specified address
|
|
if (dfunc.Connect(newsock, &sock->addr) == -1) {
|
|
reason = "Connect to Game failed";
|
|
console::info("%s\n", reason.c_str());
|
|
std::strcpy(m_return_reason, reason.c_str());
|
|
goto ErrorReturn;
|
|
}
|
|
|
|
m_return_onerror = false;
|
|
return sock;
|
|
|
|
ErrorReturn:
|
|
NET_FreeQSocket(sock);
|
|
ErrorReturn2:
|
|
dfunc.Close_Socket(newsock);
|
|
if (m_return_onerror) {
|
|
IN_Deactivate(modestate == MS_WINDOWED);
|
|
key_dest = key_menu;
|
|
m_state = m_return_state;
|
|
m_return_onerror = false;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
qsocket_t *Datagram_Connect(const char *host) {
|
|
qsocket_t *ret = NULL;
|
|
|
|
host = Strip_Port(host);
|
|
for (net_landriverlevel = 0; net_landriverlevel < net_numlandrivers; net_landriverlevel++) {
|
|
if (net_landrivers[net_landriverlevel].initialized) {
|
|
if ((ret = _Datagram_Connect(host)) != NULL)
|
|
break;
|
|
}
|
|
}
|
|
return ret;
|
|
}
|