[unix-history] / usr / src / usr.bin / finger / net.c

/*
 * Copyright (c) 1989 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Tony Nardo of the Johns Hopkins University/Applied Physics Lab.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static char sccsid[] = "@(#)net.c	5.5 (Berkeley) 6/1/90";
#endif /* not lint */

#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <stdio.h>
#include <ctype.h>

netfinger(name)
	char *name;
{
	extern int lflag;
	register FILE *fp;
	register int c, lastc;
	struct in_addr defaddr;
	struct hostent *hp, def;
	struct servent *sp;
	struct sockaddr_in sin;
	int s;
	char *alist[1], *host, *rindex();
	u_long inet_addr();

	if (!(host = rindex(name, '@')))
		return;
	*host++ = NULL;
	if (!(hp = gethostbyname(host))) {
		defaddr.s_addr = inet_addr(host);
		if (defaddr.s_addr == -1) {
			(void)fprintf(stderr,
			    "finger: unknown host: %s\n", host);
			return;
		}
		def.h_name = host;
		def.h_addr_list = alist;
		def.h_addr = (char *)&defaddr;
		def.h_length = sizeof(struct in_addr);
		def.h_addrtype = AF_INET;
		def.h_aliases = 0;
		hp = &def;
	}
	if (!(sp = getservbyname("finger", "tcp"))) {
		(void)fprintf(stderr, "finger: tcp/finger: unknown service\n");
		return;
	}
	sin.sin_family = hp->h_addrtype;
	bcopy(hp->h_addr, (char *)&sin.sin_addr, hp->h_length);
	sin.sin_port = sp->s_port;
	if ((s = socket(hp->h_addrtype, SOCK_STREAM, 0)) < 0) {
		perror("finger: socket");
		return;
	}

	/* have network connection; identify the host connected with */
	(void)printf("[%s]\n", hp->h_name);
	if (connect(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
		perror("finger: connect");
		(void)close(s);
		return;
	}

	/* -l flag for remote fingerd  */
	if (lflag)
		write(s, "/W ", 3);
	/* send the name followed by <CR><LF> */
	(void)write(s, name, strlen(name));
	(void)write(s, "\r\n", 2);

	/*
	 * Read from the remote system; once we're connected, we assume some
	 * data.  If none arrives, we hang until the user interrupts.
	 *
	 * If we see a <CR> or a <CR> with the high bit set, treat it as
	 * a newline; if followed by a newline character, only output one
	 * newline.
	 *
	 * Otherwise, all high bits are stripped; if it isn't printable and
	 * it isn't a space, we can simply set the 7th bit.  Every ASCII
	 * character with bit 7 set is printable.
	 */ 
	if (fp = fdopen(s, "r"))
		while ((c = getc(fp)) != EOF) {
			c &= 0x7f;
			if (c == 0x0d) {
				c = '\n';
				lastc = '\r';
			} else {
				if (!isprint(c) && !isspace(c))
					c |= 0x40;
				if (lastc != '\r' || c != '\n')
					lastc = c;
				else {
					lastc = '\n';
					continue;
				}
			}
			putchar(c);
		}
	if (lastc != '\n')
		putchar('\n');
	(void)fclose(fp);
}
Commit	Line	Data
bcf953e4 WJ	1	/*
	2	* Copyright (c) 1989 The Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* This code is derived from software contributed to Berkeley by
	6	* Tony Nardo of the Johns Hopkins University/Applied Physics Lab.
	7	*
	8	* Redistribution and use in source and binary forms, with or without
	9	* modification, are permitted provided that the following conditions
	10	* are met:
	11	* 1. Redistributions of source code must retain the above copyright
	12	* notice, this list of conditions and the following disclaimer.
	13	* 2. Redistributions in binary form must reproduce the above copyright
	14	* notice, this list of conditions and the following disclaimer in the
	15	* documentation and/or other materials provided with the distribution.
	16	* 3. All advertising materials mentioning features or use of this software
	17	* must display the following acknowledgement:
	18	* This product includes software developed by the University of
	19	* California, Berkeley and its contributors.
	20	* 4. Neither the name of the University nor the names of its contributors
	21	* may be used to endorse or promote products derived from this software
	22	* without specific prior written permission.
	23	*
	24	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	25	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	26	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	27	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	28	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	29	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	30	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	31	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	32	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	33	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	34	* SUCH DAMAGE.
	35	*/
	36
	37	#ifndef lint
	38	static char sccsid[] = "@(#)net.c 5.5 (Berkeley) 6/1/90";
	39	#endif /* not lint */
	40
	41	#include <sys/types.h>
	42	#include <sys/socket.h>
	43	#include <netinet/in.h>
	44	#include <netdb.h>
	45	#include <stdio.h>
	46	#include <ctype.h>
	47
	48	netfinger(name)
	49	char *name;
	50	{
	51	extern int lflag;
	52	register FILE *fp;
	53	register int c, lastc;
	54	struct in_addr defaddr;
	55	struct hostent *hp, def;
	56	struct servent *sp;
	57	struct sockaddr_in sin;
	58	int s;
	59	char alist[1], host, *rindex();
	60	u_long inet_addr();
	61
	62	if (!(host = rindex(name, '@')))
	63	return;
	64	*host++ = NULL;
65	if (!(hp = gethostbyname(host))) {
66	defaddr.s_addr = inet_addr(host);
67	if (defaddr.s_addr == -1) {
68	(void)fprintf(stderr,
69	"finger: unknown host: %s\n", host);
70	return;
71	}
72	def.h_name = host;
73	def.h_addr_list = alist;
74	def.h_addr = (char *)&defaddr;
75	def.h_length = sizeof(struct in_addr);
76	def.h_addrtype = AF_INET;
77	def.h_aliases = 0;
78	hp = &def;
79	}
80	if (!(sp = getservbyname("finger", "tcp"))) {
81	(void)fprintf(stderr, "finger: tcp/finger: unknown service\n");
82	return;
83	}
84	sin.sin_family = hp->h_addrtype;
85	bcopy(hp->h_addr, (char *)&sin.sin_addr, hp->h_length);
86	sin.sin_port = sp->s_port;
87	if ((s = socket(hp->h_addrtype, SOCK_STREAM, 0)) < 0) {
88	perror("finger: socket");
89	return;
90	}
91
92	/* have network connection; identify the host connected with */
93	(void)printf("[%s]\n", hp->h_name);
94	if (connect(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
95	perror("finger: connect");
96	(void)close(s);
97	return;
98	}
99
100	/* -l flag for remote fingerd */
101	if (lflag)
102	write(s, "/W ", 3);
103	/* send the name followed by <CR><LF> */
104	(void)write(s, name, strlen(name));
105	(void)write(s, "\r\n", 2);
106
107	/*
108	* Read from the remote system; once we're connected, we assume some
109	* data. If none arrives, we hang until the user interrupts.
110	*
111	* If we see a <CR> or a <CR> with the high bit set, treat it as
112	* a newline; if followed by a newline character, only output one
113	* newline.
114	*
115	* Otherwise, all high bits are stripped; if it isn't printable and
116	* it isn't a space, we can simply set the 7th bit. Every ASCII
117	* character with bit 7 set is printable.
118	*/
119	if (fp = fdopen(s, "r"))
120	while ((c = getc(fp)) != EOF) {
121	c &= 0x7f;
122	if (c == 0x0d) {
123	c = '\n';
124	lastc = '\r';
125	} else {
126	if (!isprint(c) && !isspace(c))
127	c \|= 0x40;
128	if (lastc != '\r' \|\| c != '\n')
129	lastc = c;
130	else {
131	lastc = '\n';
132	continue;
133	}
134	}
135	putchar(c);
136	}
137	if (lastc != '\n')
138	putchar('\n');
139	(void)fclose(fp);
140	}