512 lines
11 KiB
C
512 lines
11 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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eree 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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static __attribute__ ((unused)) const char rcsid[] =
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"$Id$";
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#ifdef HAVE_WINDOWS_H
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# include "winquake.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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#include <sys/types.h>
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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_NETINET_IN_H
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# define model_t sun_model_t
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# include <netinet/in.h>
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# undef model_t
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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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#ifdef HAVE_WINSOCK_H
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# include <winsock.h>
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#endif
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#ifdef HAVE_NETDB_H
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# include <netdb.h>
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#endif
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#ifdef HAVE_SYS_UIO_H
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# include <sys/uio.h>
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#endif
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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 <getopt.h>
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#include <stdarg.h>
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#include "protocol.h"
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static void __attribute__ ((format (printf, 1, 2)))
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ma_log (const char *fmt, ...)
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{
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va_list args;
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time_t mytime = 0;
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struct tm *local = NULL;
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char stamp[1024];
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mytime = time (NULL);
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local = localtime (&mytime);
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strftime (stamp, sizeof (stamp), "[%b %e %X] ", local);
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fprintf (stdout, "%s", stamp);
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va_start (args, fmt);
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vfprintf (stdout, fmt, args);
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va_end (args);
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fflush (stdout);
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}
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#ifdef HAVE_IN_PKTINFO
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static int
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qf_sendmsg (int sock, void *data, size_t len, struct msghdr *msghdr)
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{
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struct iovec iovec = {data, len};
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msghdr->msg_iov = &iovec;
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msghdr->msg_iovlen = 1;
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return sendmsg (sock, msghdr, 0);
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}
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static int
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qf_recvmsg (int sock, void *data, size_t len, struct msghdr *msghdr)
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{
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struct iovec iovec = {data, len};
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msghdr->msg_iov = &iovec;
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msghdr->msg_iovlen = 1;
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return recvmsg (sock, msghdr, 0);
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}
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static int
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qf_initsocket (int sock)
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{
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int ip_pktinfo = 1;
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if (setsockopt (sock, SOL_IP, IP_PKTINFO, &ip_pktinfo,
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sizeof (ip_pktinfo)) == -1) {
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perror ("setsockopt");
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return -1;
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}
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return 0;
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}
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#define MSGHDR \
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char ancillary[CMSG_SPACE (sizeof (struct in_pktinfo))]; \
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struct sockaddr_in recvaddr; \
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struct msghdr msghdr = { \
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&recvaddr, \
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sizeof (recvaddr), \
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0, 0, \
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ancillary, \
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sizeof (ancillary), \
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0 \
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}
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typedef struct msghdr msghdr_t;
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#else
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static int
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qf_sendmsg (int sock, void *data, size_t len, struct sockaddr_in *addr)
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{
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return sendto (sock, data, len, 0, (struct sockaddr *)addr, sizeof (*addr));
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}
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static int
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qf_recvmsg (int sock, void *data, size_t len, struct sockaddr_in *addr)
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{
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#ifdef HAVE_SOCKLEN_T
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socklen_t addr_len = sizeof (*addr);
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#else
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int addr_len = sizeof (*addr);
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#endif
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return recvfrom (sock, data, len, 0, (struct sockaddr *)addr, &addr_len);
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}
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static int
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qf_initsocket (int sock)
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{
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return 0;
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}
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#define MSGHDR struct sockaddr_in msghdr
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#define recvaddr msghdr
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typedef struct sockaddr_in msghdr_t;
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#endif
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#define MASTER_TIMEOUT 600
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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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qboolean notimeout;
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} server_t;
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static int
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QW_AddHeartbeat (server_t **servers_p, int slen,
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struct sockaddr_in *addr, const char *buf, qboolean notimeout)
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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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ma_log ("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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memset (&newservers[i], 0, sizeof (newservers[i]));
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freeslot = slen;
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slen += SLIST_MULTIPLE;
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*servers_p = newservers;
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servers = *servers_p;
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}
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servers[freeslot].addr = *addr;
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servers[freeslot].notimeout = notimeout;
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#if 1
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ma_log ("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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static 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].notimeout) {
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servers[i].updated = 0;
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#if 1
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ma_log ("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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static 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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ma_log ("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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static void
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QW_SendHearts (int sock, msghdr_t *msghdr, server_t *servers, 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; // connectionless packet
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out[4] = M2C_MASTER_REPLY;
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out[5] = '\n';
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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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qf_sendmsg (sock, out, (count + 1) * 6, msghdr);
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free (out);
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}
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static void
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QW_Pong (int sock, msghdr_t *msghdr)
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{
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// connectionless packet
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char data[6] = {0xFF, 0xFF, 0xFF, 0xFF, A2A_ACK, 0};
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//ma_log ("Ping\n");
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qf_sendmsg (sock, data, sizeof (data), msghdr);
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}
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int serverlen = SLIST_MULTIPLE;
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server_t *servers;
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static 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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if (!servers) {
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printf ("initial malloc failed\n");
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return;
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}
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sock = socket (AF_INET, SOCK_DGRAM, IPPROTO_UDP);
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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 (qf_initsocket (sock) == -1)
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return;
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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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while (1) {
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int size;
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char buf[31];
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MSGHDR;
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buf[30] = '\0'; // a sentinal for string ops
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size = qf_recvmsg (sock, buf, sizeof (buf) - 1, &msghdr);
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if (size == -1) {
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perror ("qf_recvmsg failed\n");
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continue;
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}
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#if 0
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ma_log ("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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ma_log ("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, &msghdr, 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, false);
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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, &msghdr);
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break;
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default:
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ma_log ("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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static int
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make_host_addr (const char *host, int port, struct sockaddr_in *host_addr)
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{
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struct hostent *host_ent;
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host_ent = gethostbyname (host);
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if (!host_ent)
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return -1;
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host_addr->sin_family = AF_INET;
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memcpy (&host_addr->sin_addr, host_ent->h_addr_list[0],
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sizeof (host_addr->sin_addr));
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host_addr->sin_port = htons (port);
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return 0;
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}
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static void
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read_hosts (const char *fname)
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{
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FILE *host_file;
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int host_port;
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char host_name[256];
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static const char *fake_heartbeat = " ";
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char *buf;
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struct sockaddr_in host_addr;
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host_file = fopen (fname, "rt");
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if (!host_file) {
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fprintf (stderr, "could not open `%s'\n", fname);
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return;
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}
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while (fgets (host_name, sizeof (host_name), host_file)) {
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for (buf = host_name; *buf && !isspace ((byte)*buf) && *buf !=':';
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buf++)
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;
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if (*buf)
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*buf++ = 0;
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if (*buf)
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host_port = atoi (buf);
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else
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host_port = PORT_SERVER;
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if (make_host_addr (host_name, host_port, &host_addr) == -1) {
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fprintf (stderr, "could not resolve `%s', skipping", host_name);
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continue;
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}
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serverlen = QW_AddHeartbeat (&servers, serverlen, &host_addr,
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fake_heartbeat, true);
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}
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fclose (host_file);
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}
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static int
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net_init (void)
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{
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#ifdef _WIN32
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int i;
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WSADATA winsockdata;
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i = WSAStartup (MAKEWORD (1, 1), &winsockdata);
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if (i) {
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printf ("Winsock initialization failed.\n");
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return 0;
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}
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#endif
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return 1;
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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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struct sockaddr_in addr;
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int c;
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if (!net_init ())
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return 1;
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servers = calloc (sizeof (server_t), serverlen);
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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 (PORT_MASTER);
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while ((c = getopt (argc, argv, "b:p:f:")) != -1) {
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switch (c) {
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case 'b':
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c = inet_addr (optarg);
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if (c == -1) {
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fprintf (stderr, "bad bind address %s\n", optarg);
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return 1;
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}
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addr.sin_addr.s_addr = c;
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break;
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case 'f':
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read_hosts (optarg);
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break;
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case 'p':
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addr.sin_port = htons (atoi (optarg));
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break;
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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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