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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* chargen inetd service - both stream and dgram based.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <unistd.h>
#include <stdio.h>
#include <strings.h>
#include <netinet/in.h>
#include <sys/sysmacros.h>
#include <ctype.h>
#include <inetsvc.h>
#define LINESIZE 72
#define RINGSIZE 128
static char ring[RINGSIZE];
static char *endring;
static void
initring(void)
{
unsigned char ch;
endring = ring;
for (ch = 0; ch <= RINGSIZE; ++ch) {
if (isprint(ch))
*endring++ = ch;
}
}
static void
chargen_stream(int s, char *argv[])
{
char text[LINESIZE+2];
int i;
char *rp;
char *dp;
char *rs = ring;
setproctitle("chargen", s, argv);
for (;;) {
if (rs >= endring)
rs = ring;
rp = rs++;
dp = text;
i = MIN(LINESIZE, endring - rp);
(void) memmove(dp, rp, i);
dp += i;
if ((rp += i) >= endring)
rp = ring;
if (i < LINESIZE) {
i = LINESIZE - i;
(void) memmove(dp, rp, i);
dp += i;
if ((rp += i) >= endring)
rp = ring;
}
*dp++ = '\r';
*dp++ = '\n';
if (safe_write(s, text, dp - text) != 0)
break;
}
}
/* ARGSUSED3 */
static void
chargen_dg(int s, const struct sockaddr *sap, int sa_size, const void *buf,
size_t sz)
{
char text[LINESIZE+2];
int i;
char *rp;
static char *rs = ring;
rp = rs;
if (rs++ >= endring)
rs = ring;
i = MIN(LINESIZE, endring - rp);
(void) memmove(text, rp, i);
if ((rp += i) >= endring)
rp = ring;
if (i < LINESIZE) {
(void) memmove(text, rp, i);
if ((rp += i) >= endring)
rp = ring;
}
text[LINESIZE - 2] = '\r';
text[LINESIZE - 1] = '\n';
(void) safe_sendto(s, text, sizeof (text), 0, sap, sa_size);
}
int
main(int argc, char *argv[])
{
opterr = 0; /* disable getopt error msgs */
initring();
switch (getopt(argc, argv, "ds")) {
case 'd':
dg_template(chargen_dg, STDIN_FILENO, NULL, 0);
break;
case 's':
chargen_stream(STDIN_FILENO, argv);
break;
default:
return (1);
}
return (0);
}
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