237 lines
5.3 KiB
C
237 lines
5.3 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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#include <sys/socket.h>
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#include <arpa/inet.h>
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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 <unistd.h>
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#include <stdlib.h>
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#include <string.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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#ifndef MASTER_TIMEOUT
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# define MASTER_TIMEOUT 300
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#endif
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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, struct sockaddr_in *addr)
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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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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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time(&servers[i].updated);
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#if 1
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printf("Refreshed %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 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=(server_t*)realloc(servers,sizeof(server_t)*(slen+50));
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if (newservers==NULL) {
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return slen; // boo.
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}
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for (i=slen;i<slen+50;i++) {
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newservers[i].updated=0;
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}
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memcpy(newservers,servers,slen*sizeof(server_t));
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freeslot=slen;
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slen+=50;
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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\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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#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 && 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 QW_HeartShutdown(struct sockaddr_in *addr,server_t *servers, int slen) {
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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,
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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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}
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out=(unsigned char *)malloc((count+1)*6*sizeof(unsigned char));
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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*6*sizeof(unsigned char),0,
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(struct sockaddr*)addr,sizeof(struct sockaddr_in));
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free(out);
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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=(server_t*)malloc(sizeof(server_t)*50);
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int serverlen=50;
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int i;
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if (servers==NULL) return;
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for (i=0;i<50;i++) {
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servers[i].updated=0;
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}
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sock=socket(AF_INET,SOCK_DGRAM,0);
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if (sock<0) {
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return;
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}
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if (bind(sock,(struct sockaddr*)addr,sizeof(struct sockaddr_in))!=0)
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return;
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listen(sock,4); // probably don't need this.
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while (1) {
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char buf[3];
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struct sockaddr_in recvaddr;
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int recvsize;
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recvfrom(sock,buf,3,0,(struct sockaddr*)&recvaddr,&recvsize);
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printf("Got 0x%x\n",buf[0]);
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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,&recvaddr);
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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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}
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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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