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Linux Cubed Series 8: LINUX Games
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Linux Cubed Series 8 - LINUX Games.iso
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RWHO
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clilib.c
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C/C++ Source or Header
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1991-07-11
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3KB
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177 lines
/*
Copyright (C) 1991, Marcus J. Ranum. All rights reserved.
*/
#ifndef lint
static char RCSid[] = "$Header: /usr/users/mjr/hacks/umud/RWHO/RCS/clilib.c,v 1.1 91/06/17 14:39:26 mjr Rel $";
#endif
/*
code to interface client MUDs with rwho server
this is a standalone library.
*/
#include <stdio.h>
#include <ctype.h>
#include <fcntl.h>
#include <sys/file.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#define DGRAMPORT 6888
#ifndef NO_HUGE_RESOLVER_CODE
extern struct hostent *gethostbyname();
#endif
extern char *malloc();
static int dgramfd = -1;
static char *password;
static char *localnam;
static char *lcomment;
static struct sockaddr_in addr;
time_t senttime;
/* enable RWHO and send the server a "we are up" message */
rwhocli_setup(server,serverpw,myname,comment)
char *server;
char *serverpw;
char *myname;
char *comment;
{
#ifndef NO_HUGE_RESOLVER_CODE
struct hostent *hp;
#endif
char pbuf[512];
char *p;
if(dgramfd != -1)
return(1);
password = malloc(strlen(serverpw) + 1);
localnam = malloc(strlen(myname) + 1);
lcomment = malloc(strlen(comment) + 1);
if(password == (char *)0 || localnam == (char *)0 || lcomment == (char *)0)
return(1);
strcpy(password,serverpw);
strcpy(localnam,myname);
strcpy(lcomment,comment);
p = server;
while(*p != '\0' && (*p == '.' || isdigit(*p)))
p++;
if(*p != '\0') {
#ifndef NO_HUGE_RESOLVER_CODE
if((hp = gethostbyname(server)) == (struct hostent *)0)
return(1);
(void)bcopy(hp->h_addr,(char *)&addr.sin_addr,hp->h_length);
#else
return(1);
#endif
} else {
unsigned long f;
if((f = inet_addr(server)) == -1L)
return(1);
(void)bcopy((char *)&f,(char *)&addr.sin_addr,sizeof(f));
}
addr.sin_port = htons(DGRAMPORT);
addr.sin_family = AF_INET;
if((dgramfd = socket(AF_INET,SOCK_DGRAM,0)) < 0)
return(1);
time(&senttime);
sprintf(pbuf,"U\t%.20s\t%.20s\t%.20s\t%.10d\t0\t%.25s",
localnam,password,localnam,senttime,comment);
sendto(dgramfd,pbuf,strlen(pbuf),0,&addr,sizeof(addr));
return(0);
}
/* disable RWHO */
rwhocli_shutdown()
{
char pbuf[512];
if(dgramfd != -1) {
sprintf(pbuf,"D\t%.20s\t%.20s\t%.20s",localnam,password,localnam);
sendto(dgramfd,pbuf,strlen(pbuf),0,&addr,sizeof(addr));
close(dgramfd);
dgramfd = -1;
free(password);
free(localnam);
}
return(0);
}
/* send an update ping that we're alive */
rwhocli_pingalive()
{
char pbuf[512];
if(dgramfd != -1) {
sprintf(pbuf,"M\t%.20s\t%.20s\t%.20s\t%.10d\t0\t%.25s",
localnam,password,localnam,senttime,lcomment);
sendto(dgramfd,pbuf,strlen(pbuf),0,&addr,sizeof(addr));
}
return(0);
}
/* send a "so-and-so-logged in" message */
rwhocli_userlogin(uid,name,tim)
char *uid;
char *name;
time_t tim;
{
char pbuf[512];
if(dgramfd != -1) {
sprintf(pbuf,"A\t%.20s\t%.20s\t%.20s\t%.20s\t%.10d\t0\t%.20s",
localnam,password,localnam,uid,tim,name);
sendto(dgramfd,pbuf,strlen(pbuf),0,&addr,sizeof(addr));
}
return(0);
}
/* send a "so-and-so-logged out" message */
rwhocli_userlogout(uid)
char *uid;
{
char pbuf[512];
if(dgramfd != -1) {
sprintf(pbuf,"Z\t%.20s\t%.20s\t%.20s\t%.20s",
localnam,password,localnam,uid);
sendto(dgramfd,pbuf,strlen(pbuf),0,&addr,sizeof(addr));
}
return(0);
}