1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate * CDDL HEADER START
3*0Sstevel@tonic-gate *
4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*0Sstevel@tonic-gate * with the License.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate * and limitations under the License.
13*0Sstevel@tonic-gate *
14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate *
20*0Sstevel@tonic-gate * CDDL HEADER END
21*0Sstevel@tonic-gate */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
24*0Sstevel@tonic-gate * Use is subject to license terms.
25*0Sstevel@tonic-gate */
26*0Sstevel@tonic-gate
27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
28*0Sstevel@tonic-gate
29*0Sstevel@tonic-gate /*
30*0Sstevel@tonic-gate * chargen inetd service - both stream and dgram based.
31*0Sstevel@tonic-gate */
32*0Sstevel@tonic-gate
33*0Sstevel@tonic-gate #include <sys/types.h>
34*0Sstevel@tonic-gate #include <sys/socket.h>
35*0Sstevel@tonic-gate #include <unistd.h>
36*0Sstevel@tonic-gate #include <stdio.h>
37*0Sstevel@tonic-gate #include <strings.h>
38*0Sstevel@tonic-gate #include <netinet/in.h>
39*0Sstevel@tonic-gate #include <sys/sysmacros.h>
40*0Sstevel@tonic-gate #include <ctype.h>
41*0Sstevel@tonic-gate #include <inetsvc.h>
42*0Sstevel@tonic-gate
43*0Sstevel@tonic-gate
44*0Sstevel@tonic-gate #define LINESIZE 72
45*0Sstevel@tonic-gate #define RINGSIZE 128
46*0Sstevel@tonic-gate
47*0Sstevel@tonic-gate
48*0Sstevel@tonic-gate static char ring[RINGSIZE];
49*0Sstevel@tonic-gate static char *endring;
50*0Sstevel@tonic-gate
51*0Sstevel@tonic-gate
52*0Sstevel@tonic-gate static void
initring(void)53*0Sstevel@tonic-gate initring(void)
54*0Sstevel@tonic-gate {
55*0Sstevel@tonic-gate unsigned char ch;
56*0Sstevel@tonic-gate
57*0Sstevel@tonic-gate endring = ring;
58*0Sstevel@tonic-gate
59*0Sstevel@tonic-gate for (ch = 0; ch <= RINGSIZE; ++ch) {
60*0Sstevel@tonic-gate if (isprint(ch))
61*0Sstevel@tonic-gate *endring++ = ch;
62*0Sstevel@tonic-gate }
63*0Sstevel@tonic-gate }
64*0Sstevel@tonic-gate
65*0Sstevel@tonic-gate static void
chargen_stream(int s,char * argv[])66*0Sstevel@tonic-gate chargen_stream(int s, char *argv[])
67*0Sstevel@tonic-gate {
68*0Sstevel@tonic-gate char text[LINESIZE+2];
69*0Sstevel@tonic-gate int i;
70*0Sstevel@tonic-gate char *rp;
71*0Sstevel@tonic-gate char *dp;
72*0Sstevel@tonic-gate char *rs = ring;
73*0Sstevel@tonic-gate
74*0Sstevel@tonic-gate setproctitle("chargen", s, argv);
75*0Sstevel@tonic-gate
76*0Sstevel@tonic-gate for (;;) {
77*0Sstevel@tonic-gate if (rs >= endring)
78*0Sstevel@tonic-gate rs = ring;
79*0Sstevel@tonic-gate rp = rs++;
80*0Sstevel@tonic-gate dp = text;
81*0Sstevel@tonic-gate i = MIN(LINESIZE, endring - rp);
82*0Sstevel@tonic-gate (void) memmove(dp, rp, i);
83*0Sstevel@tonic-gate dp += i;
84*0Sstevel@tonic-gate if ((rp += i) >= endring)
85*0Sstevel@tonic-gate rp = ring;
86*0Sstevel@tonic-gate if (i < LINESIZE) {
87*0Sstevel@tonic-gate i = LINESIZE - i;
88*0Sstevel@tonic-gate (void) memmove(dp, rp, i);
89*0Sstevel@tonic-gate dp += i;
90*0Sstevel@tonic-gate if ((rp += i) >= endring)
91*0Sstevel@tonic-gate rp = ring;
92*0Sstevel@tonic-gate }
93*0Sstevel@tonic-gate
94*0Sstevel@tonic-gate *dp++ = '\r';
95*0Sstevel@tonic-gate *dp++ = '\n';
96*0Sstevel@tonic-gate
97*0Sstevel@tonic-gate if (safe_write(s, text, dp - text) != 0)
98*0Sstevel@tonic-gate break;
99*0Sstevel@tonic-gate }
100*0Sstevel@tonic-gate }
101*0Sstevel@tonic-gate
102*0Sstevel@tonic-gate /* ARGSUSED3 */
103*0Sstevel@tonic-gate static void
chargen_dg(int s,const struct sockaddr * sap,int sa_size,const void * buf,size_t sz)104*0Sstevel@tonic-gate chargen_dg(int s, const struct sockaddr *sap, int sa_size, const void *buf,
105*0Sstevel@tonic-gate size_t sz)
106*0Sstevel@tonic-gate {
107*0Sstevel@tonic-gate char text[LINESIZE+2];
108*0Sstevel@tonic-gate int i;
109*0Sstevel@tonic-gate char *rp;
110*0Sstevel@tonic-gate static char *rs = ring;
111*0Sstevel@tonic-gate
112*0Sstevel@tonic-gate rp = rs;
113*0Sstevel@tonic-gate if (rs++ >= endring)
114*0Sstevel@tonic-gate rs = ring;
115*0Sstevel@tonic-gate i = MIN(LINESIZE, endring - rp);
116*0Sstevel@tonic-gate (void) memmove(text, rp, i);
117*0Sstevel@tonic-gate if ((rp += i) >= endring)
118*0Sstevel@tonic-gate rp = ring;
119*0Sstevel@tonic-gate if (i < LINESIZE) {
120*0Sstevel@tonic-gate (void) memmove(text, rp, i);
121*0Sstevel@tonic-gate if ((rp += i) >= endring)
122*0Sstevel@tonic-gate rp = ring;
123*0Sstevel@tonic-gate }
124*0Sstevel@tonic-gate
125*0Sstevel@tonic-gate text[LINESIZE - 2] = '\r';
126*0Sstevel@tonic-gate text[LINESIZE - 1] = '\n';
127*0Sstevel@tonic-gate
128*0Sstevel@tonic-gate (void) safe_sendto(s, text, sizeof (text), 0, sap, sa_size);
129*0Sstevel@tonic-gate }
130*0Sstevel@tonic-gate
131*0Sstevel@tonic-gate int
main(int argc,char * argv[])132*0Sstevel@tonic-gate main(int argc, char *argv[])
133*0Sstevel@tonic-gate {
134*0Sstevel@tonic-gate opterr = 0; /* disable getopt error msgs */
135*0Sstevel@tonic-gate
136*0Sstevel@tonic-gate initring();
137*0Sstevel@tonic-gate
138*0Sstevel@tonic-gate switch (getopt(argc, argv, "ds")) {
139*0Sstevel@tonic-gate case 'd':
140*0Sstevel@tonic-gate dg_template(chargen_dg, STDIN_FILENO, NULL, 0);
141*0Sstevel@tonic-gate break;
142*0Sstevel@tonic-gate case 's':
143*0Sstevel@tonic-gate chargen_stream(STDIN_FILENO, argv);
144*0Sstevel@tonic-gate break;
145*0Sstevel@tonic-gate default:
146*0Sstevel@tonic-gate return (1);
147*0Sstevel@tonic-gate }
148*0Sstevel@tonic-gate
149*0Sstevel@tonic-gate return (0);
150*0Sstevel@tonic-gate }
151