GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.bin/finger/net.c Lines: 0 45 0.0 %
Date: 2017-11-07 Branches: 0 40 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: net.c,v 1.13 2015/01/16 06:40:07 deraadt Exp $	*/
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/*
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 * Copyright (c) 1989 The Regents of the University of California.
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 * All rights reserved.
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 *
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 * This code is derived from software contributed to Berkeley by
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 * Tony Nardo of the Johns Hopkins University/Applied Physics Lab.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of the University nor the names of its contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <stdio.h>
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#include <string.h>
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#include <ctype.h>
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#include <unistd.h>
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#include <err.h>
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#include "finger.h"
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#include "extern.h"
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void
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netfinger(name)
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	char *name;
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{
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	FILE *fp;
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	int c, lastc;
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	int s;
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	char *host;
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	struct addrinfo hints, *res0, *res;
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	int error;
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	char hbuf[NI_MAXHOST];
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	lastc = 0;
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	if (!(host = strrchr(name, '@')))
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		return;
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	*host++ = '\0';
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	memset(&hints, 0, sizeof(hints));
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	hints.ai_family = PF_UNSPEC;
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	hints.ai_socktype = SOCK_STREAM;
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	error = getaddrinfo(host, "finger", &hints, &res0);
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	if (error) {
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		warnx("%s", gai_strerror(error));
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		return;
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	}
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	s = -1;
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	for (res = res0; res; res = res->ai_next) {
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		if ((s = socket(res->ai_family, res->ai_socktype,
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				res->ai_protocol)) < 0) {
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			continue;
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		}
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		if (connect(s, res->ai_addr, res->ai_addrlen) < 0) {
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			(void)close(s);
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			s = -1;
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			continue;
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		}
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		break;
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	}
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	if (s < 0) {
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		perror("finger");
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		freeaddrinfo(res0);
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		return;
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	}
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	/* have network connection; identify the host connected with */
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	if (getnameinfo(res->ai_addr, res->ai_addrlen, hbuf, sizeof(hbuf),
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	    NULL, 0, NI_NUMERICHOST) != 0) {
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		strlcpy(hbuf, "(invalid)", sizeof hbuf);
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	}
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	(void)printf("[%s/%s]\n", host, hbuf);
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	freeaddrinfo(res0);
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	/* -l flag for remote fingerd  */
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	if (lflag)
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		write(s, "/W ", 3);
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	/* send the name followed by <CR><LF> */
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	(void)write(s, name, strlen(name));
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	(void)write(s, "\r\n", 2);
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	/*
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	 * Read from the remote system; once we're connected, we assume some
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	 * data.  If none arrives, we hang until the user interrupts.
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	 *
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	 * If we see a <CR> or a <CR> with the high bit set, treat it as
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	 * a newline; if followed by a newline character, only output one
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	 * newline.
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	 *
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	 * Otherwise, all high bits are stripped; if it isn't printable and
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	 * it isn't a space, we can simply set the 7th bit.  Every ASCII
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	 * character with bit 7 set is printable.
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	 */
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	if ((fp = fdopen(s, "r")) != NULL)
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		while ((c = getc(fp)) != EOF) {
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			c &= 0x7f;
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			if (c == '\r') {
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				if (lastc == '\r')
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					continue;
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				c = '\n';
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				lastc = '\r';
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			} else {
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				if (!isprint(c) && !isspace(c))
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					c |= 0x40;
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				if (lastc != '\r' || c != '\n')
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					lastc = c;
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				else {
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					lastc = '\n';
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					continue;
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				}
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			}
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			putchar(c);
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		}
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	if (lastc != '\n')
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		putchar('\n');
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	(void)fclose(fp);
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}