mirror of
https://github.com/freebsd/freebsd-src.git
synced 2024-12-05 01:30:43 +00:00
8c9589bdea
characters was reversed, resulting in some network appliances, including at least some NAS devices from Ascend, not recognizing our finger(1) request. PR: 45914 Submitted by: J R Matthews <jrm@delta-e.com.au> Approved by: re (rwatson) MFC after: 2 weeks
247 lines
6.3 KiB
C
247 lines
6.3 KiB
C
/*
|
|
* Copyright (c) 1989, 1993
|
|
* 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.
|
|
*/
|
|
|
|
#if 0
|
|
#ifndef lint
|
|
static char sccsid[] = "@(#)net.c 8.4 (Berkeley) 4/28/95";
|
|
#endif
|
|
#endif
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/uio.h>
|
|
#include <ctype.h>
|
|
#include <db.h>
|
|
#include <err.h>
|
|
#include <netdb.h>
|
|
#include <pwd.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <utmp.h>
|
|
#include "finger.h"
|
|
|
|
static void cleanup(int sig);;
|
|
static int do_protocol(const char *name, const struct addrinfo *ai);
|
|
static void trying(const struct addrinfo *ai);
|
|
|
|
void
|
|
netfinger(char *name)
|
|
{
|
|
int error, multi;
|
|
char *host;
|
|
struct addrinfo *ai, *ai0;
|
|
static struct addrinfo hint;
|
|
|
|
host = strrchr(name, '@');
|
|
if (host == 0)
|
|
return;
|
|
*host++ = '\0';
|
|
signal(SIGALRM, cleanup);
|
|
alarm(TIME_LIMIT);
|
|
|
|
hint.ai_flags = AI_CANONNAME;
|
|
hint.ai_family = family;
|
|
hint.ai_socktype = SOCK_STREAM;
|
|
|
|
error = getaddrinfo(host, "finger", &hint, &ai0);
|
|
if (error) {
|
|
warnx("%s: %s", host, gai_strerror(error));
|
|
return;
|
|
}
|
|
|
|
multi = (ai0->ai_next) != 0;
|
|
|
|
/* ai_canonname may not be filled in if the user specified an IP. */
|
|
if (ai0->ai_canonname == 0)
|
|
printf("[%s]\n", host);
|
|
else
|
|
printf("[%s]\n", ai0->ai_canonname);
|
|
|
|
for (ai = ai0; ai != 0; ai = ai->ai_next) {
|
|
if (multi)
|
|
trying(ai);
|
|
|
|
error = do_protocol(name, ai);
|
|
if (!error)
|
|
break;
|
|
}
|
|
alarm(0);
|
|
freeaddrinfo(ai0);
|
|
}
|
|
|
|
static int
|
|
do_protocol(const char *name, const struct addrinfo *ai)
|
|
{
|
|
int cnt, line_len, s;
|
|
FILE *fp;
|
|
int c, lastc;
|
|
struct iovec iov[3];
|
|
struct msghdr msg;
|
|
static char slash_w[] = "/W ";
|
|
static char neteol[] = "\r\n";
|
|
|
|
s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
|
|
if (s < 0) {
|
|
warn("socket(%d, %d, %d)", ai->ai_family, ai->ai_socktype,
|
|
ai->ai_protocol);
|
|
return -1;
|
|
}
|
|
|
|
msg.msg_name = (void *)ai->ai_addr;
|
|
msg.msg_namelen = ai->ai_addrlen;
|
|
msg.msg_iov = iov;
|
|
msg.msg_iovlen = 0;
|
|
msg.msg_control = 0;
|
|
msg.msg_controllen = 0;
|
|
msg.msg_flags = 0;
|
|
|
|
/* -l flag for remote fingerd */
|
|
if (lflag) {
|
|
iov[msg.msg_iovlen].iov_base = slash_w;
|
|
iov[msg.msg_iovlen++].iov_len = 3;
|
|
}
|
|
/* send the name followed by <CR><LF> */
|
|
iov[msg.msg_iovlen].iov_base = strdup(name);
|
|
iov[msg.msg_iovlen++].iov_len = strlen(name);
|
|
iov[msg.msg_iovlen].iov_base = neteol;
|
|
iov[msg.msg_iovlen++].iov_len = 2;
|
|
|
|
/*
|
|
* -T disables data-on-SYN: compatibility option to finger broken
|
|
* hosts. Also, the implicit-open API is broken on IPv6, so do
|
|
* the explicit connect there, too.
|
|
*/
|
|
if ((Tflag || ai->ai_addr->sa_family == AF_INET6)
|
|
&& connect(s, ai->ai_addr, ai->ai_addrlen) < 0) {
|
|
warn("connect");
|
|
close(s);
|
|
return -1;
|
|
}
|
|
|
|
if (sendmsg(s, &msg, 0) < 0) {
|
|
warn("sendmsg");
|
|
close(s);
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
lastc = 0;
|
|
if ((fp = fdopen(s, "r")) != NULL) {
|
|
cnt = 0;
|
|
line_len = 0;
|
|
while ((c = getc(fp)) != EOF) {
|
|
if (++cnt > OUTPUT_MAX) {
|
|
printf("\n\n Output truncated at %d bytes...\n",
|
|
cnt - 1);
|
|
break;
|
|
}
|
|
if (c == 0x0d) {
|
|
if (lastc == '\r') /* ^M^M - skip dupes */
|
|
continue;
|
|
c = '\n';
|
|
lastc = '\r';
|
|
} else {
|
|
if (!isprint(c) && !isspace(c)) {
|
|
c &= 0x7f;
|
|
c |= 0x40;
|
|
}
|
|
if (lastc != '\r' || c != '\n')
|
|
lastc = c;
|
|
else {
|
|
lastc = '\n';
|
|
continue;
|
|
}
|
|
}
|
|
putchar(c);
|
|
if (c != '\n' && ++line_len > _POSIX2_LINE_MAX) {
|
|
putchar('\\');
|
|
putchar('\n');
|
|
lastc = '\r';
|
|
}
|
|
if (lastc == '\n' || lastc == '\r')
|
|
line_len = 0;
|
|
}
|
|
if (ferror(fp)) {
|
|
/*
|
|
* Assume that whatever it was set errno...
|
|
*/
|
|
warn("reading from network");
|
|
}
|
|
if (lastc != '\n')
|
|
putchar('\n');
|
|
|
|
fclose(fp);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
trying(const struct addrinfo *ai)
|
|
{
|
|
char buf[NI_MAXHOST];
|
|
|
|
if (getnameinfo(ai->ai_addr, ai->ai_addrlen, buf, sizeof buf,
|
|
(char *)0, 0, NI_NUMERICHOST) != 0)
|
|
return; /* XXX can't happen */
|
|
|
|
printf("Trying %s...\n", buf);
|
|
}
|
|
|
|
void
|
|
cleanup(int sig __unused)
|
|
{
|
|
#define ERRSTR "Timed out.\n"
|
|
write(STDERR_FILENO, ERRSTR, sizeof ERRSTR);
|
|
exit(1);
|
|
}
|
|
|