320 lines
7.0 KiB
C
320 lines
7.0 KiB
C
/*
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master.c
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Quakeworld master server
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Copyright (C) 1996-1997 Id Software, Inc.
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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:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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/* afternoon hack (james was here.)
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FIXME: I coded this outside of the QF tree so it has non-quake
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stuff like malloc and things... ie, it's POSIX, not quake. */
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef HAVE_UNISTD_H
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# include "unistd.h"
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#endif
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#ifdef HAVE_SYS_SOCKET_H
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# include <sys/socket.h>
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#endif
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#ifdef HAVE_ARPA_INET_H
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# include <arpa/inet.h>
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#endif
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#include <sys/types.h>
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#include <time.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include "protocol.h"
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#if 0
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#define S2C_CHALLENGE 'c'
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#define S2M_HEARTBEAT 'a'
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#define S2M_SHUTDOWN 'C'
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#endif
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#define MASTER_TIMEOUT 300
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#define SLIST_MULTIPLE 1
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typedef struct {
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struct sockaddr_in addr;
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time_t updated;
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} server_t;
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int
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QW_AddHeartbeat (server_t **servers_p, int slen,
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struct sockaddr_in *addr, char *buf)
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{
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server_t *servers = *servers_p;
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int freeslot = -1;
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int i;
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int sequence, players;
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char *c;
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sequence = atoi (buf + 2);
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c = strchr (buf + 2, '\n');
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players = c ? atoi (c + 1) : 0;
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for (i = 0; i < slen; i++) {
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if (servers[i].updated
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&& servers[i].addr.sin_addr.s_addr == addr->sin_addr.s_addr
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&& servers[i].addr.sin_port == addr->sin_port) {
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time (&servers[i].updated);
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#if 1
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printf ("Refreshed %s:%d (seq %d, players %d)\n",
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inet_ntoa (servers[i].addr.sin_addr),
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ntohs (servers[i].addr.sin_port),
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sequence, players);
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#endif
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return slen;
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} else if (freeslot == -1 && servers[i].updated == 0) {
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freeslot = i;
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}
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}
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if (freeslot == -1) {
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server_t *newservers;
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newservers = realloc (servers, sizeof (server_t)
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* (slen + SLIST_MULTIPLE));
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if (!newservers) {
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printf ("realloc failed\n");
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return slen; // boo.
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}
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for (i = slen; i < slen + SLIST_MULTIPLE; i++)
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newservers[i].updated = 0;
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freeslot = slen;
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slen += SLIST_MULTIPLE;
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*servers_p = newservers;
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}
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servers[freeslot].addr = *addr;
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#if 1
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printf ("Added %s:%d (seq %d, players %d)\n",
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inet_ntoa (servers[freeslot].addr.sin_addr),
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ntohs (servers[freeslot].addr.sin_port),
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sequence, players);
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#endif
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time (&(servers[freeslot].updated));
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return slen;
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}
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void
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QW_TimeoutHearts (server_t *servers, int slen)
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{
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time_t t;
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int i;
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time (&t);
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for (i = 0; i < slen; i++) {
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if (servers[i].updated != 0
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&& servers[i].updated < t - MASTER_TIMEOUT) {
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servers[i].updated = 0;
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#if 1
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printf ("Removed %s:%d (timeout)\n",
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inet_ntoa (servers[i].addr.sin_addr),
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ntohs (servers[i].addr.sin_port));
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#endif
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}
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}
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}
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void
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QW_HeartShutdown (struct sockaddr_in *addr, server_t *servers,
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int slen)
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{
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int i;
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for (i = 0; i < slen; i++) {
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if (servers[i].addr.sin_addr.s_addr == addr->sin_addr.s_addr
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&& servers[i].addr.sin_port == addr->sin_port) {
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servers[i].updated = 0;
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#if 1
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printf ("Removed %s:%d\n",
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inet_ntoa (servers[i].addr.sin_addr),
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ntohs (servers[i].addr.sin_port));
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#endif
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return;
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}
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}
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}
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void
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QW_SendHearts (int sock, struct sockaddr_in *addr, server_t *servers,
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int serverlen)
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{
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unsigned char *out;
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int count, cpos;
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int i;
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count = 0;
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for (i = 0; i < serverlen; i++)
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if (servers[i].updated != 0)
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count++;
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out = malloc ((count + 1) * 6);
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if (!out) {
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printf ("malloc failed\n");
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return;
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}
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cpos = 1;
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out[0] = out[1] = out[2] = out[3] = 0xff;
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out[4] = 0x64;
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out[5] = 0x0a;
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for (i = 0; i < serverlen; i++) {
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if (servers[i].updated != 0) {
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unsigned char *p = out + (cpos * 6);
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p[0] = ((unsigned char *) &servers[i].addr.sin_addr.s_addr)[0];
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p[1] = ((unsigned char *) &servers[i].addr.sin_addr.s_addr)[1];
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p[2] = ((unsigned char *) &servers[i].addr.sin_addr.s_addr)[2];
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p[3] = ((unsigned char *) &servers[i].addr.sin_addr.s_addr)[3];
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p[4] = (unsigned char) (ntohs(servers[i].addr.sin_port) >> 8);
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p[5] = (unsigned char) (ntohs(servers[i].addr.sin_port) & 0xFF);
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++cpos;
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}
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}
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sendto (sock, out, (count + 1) * 6, 0, (struct sockaddr *) addr,
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sizeof (struct sockaddr_in));
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free (out);
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}
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void
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QW_Pong (int sock, struct sockaddr_in *addr)
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{
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char data[6] = {0xFF, 0xFF, 0xFF, 0xFF, A2A_ACK, 0};
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printf ("Ping\n");
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sendto (sock, data, sizeof (data), 0,
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(struct sockaddr *) addr, sizeof (struct sockaddr_in));
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}
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void
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QW_Master (struct sockaddr_in *addr)
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{
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int sock;
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server_t *servers;
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int serverlen = SLIST_MULTIPLE;
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int i;
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servers = malloc (sizeof (server_t) * serverlen);
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if (!servers) {
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printf ("initial malloc failed\n");
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return;
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}
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for (i = 0; i < serverlen; i++)
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servers[i].updated = 0;
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sock = socket (AF_INET, SOCK_DGRAM, 0);
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if (sock < 0) {
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printf ("socket failed\n");
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return;
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}
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if (bind (sock, (struct sockaddr *) addr, sizeof (struct sockaddr_in))) {
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printf ("bind failed\n");
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return;
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}
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listen (sock, 4); // probably don't need this.
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while (1) {
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char buf[31];
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struct sockaddr_in recvaddr;
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int recvsize = sizeof (struct sockaddr_in);
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int size;
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buf[30] = '\0'; // a sentinal for string ops
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size = recvfrom (sock, buf, sizeof (buf) - 1, 0,
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(struct sockaddr *) &recvaddr, &recvsize);
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if (size == -1) {
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printf ("recvfrom failed\n");
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continue;
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}
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#if 0
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printf ("Got %d bytes: 0x%x from %s\n", size, buf[0],
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inet_ntoa (recvaddr.sin_addr));
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#endif
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#if 0
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printf ("Message Contents: '");
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{ // so that 'j' isn't unused when commented out
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int j;
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for (j = 0; j < size; j++)
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if (isprint (buf[j]))
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printf ("%c", buf[j]);
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else
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switch (buf[j]) {
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case '\n': printf ("\\n"); break;
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case '\0': printf ("\\0"); break;
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default: printf ("(%02x)", buf[j]);
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}
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}
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printf ("'\n");
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#endif
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QW_TimeoutHearts (servers, serverlen);
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switch (buf[0]) {
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case S2C_CHALLENGE:
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QW_SendHearts (sock, &recvaddr, servers, serverlen);
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break;
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case S2M_HEARTBEAT:
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serverlen = QW_AddHeartbeat (&servers, serverlen,
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&recvaddr, buf);
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break;
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case S2M_SHUTDOWN:
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QW_HeartShutdown (&recvaddr, servers, serverlen);
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break;
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case A2A_PING:
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QW_Pong (sock, &recvaddr);
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break;
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default:
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printf ("Unknown 0x%x\n", buf[0]);
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break;
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}
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}
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free (servers);
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}
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int
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main (int argc, char **argv)
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{
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int c;
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struct sockaddr_in addr;
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addr.sin_family = AF_INET;
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addr.sin_addr.s_addr = INADDR_ANY;
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addr.sin_port = htons (27000);
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while ((c = getopt (argc, argv, "p:")) != -1) {
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if (c == 'p') {
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addr.sin_port = htons (atoi (optarg));
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}
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}
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QW_Master (&addr);
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return 0;
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}
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