3772e4fc97
util/term/term.c:
Reindent.
util/term/term.c:
Assume localhost if only port number is given on command line.
--HG--
extra : convert_revision : 768e61a56339a0795ca258cca788e9a2c20cbaae
314 lines
8.8 KiB
C
314 lines
8.8 KiB
C
/* $OpenBSD: netcat.c,v 1.57 2002/12/30 18:00:18 stevesk Exp $ */
|
|
/*
|
|
* Copyright (c) 2001 Eric Jackson <ericj@monkey.org>
|
|
*
|
|
* 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. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/termios.h>
|
|
#include <sys/time.h>
|
|
#include <sys/un.h>
|
|
|
|
#include <netinet/in.h>
|
|
#include <arpa/telnet.h>
|
|
|
|
#include <err.h>
|
|
#include <errno.h>
|
|
#include <netdb.h>
|
|
#include <poll.h>
|
|
#include <stdarg.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
|
|
ssize_t atomicio(ssize_t (*)(), int, void *, size_t);
|
|
void readwrite(int);
|
|
int remote_connect(char *, char *, struct addrinfo);
|
|
|
|
struct termios saved_ios;
|
|
void raw_term();
|
|
void restore_term();
|
|
|
|
char progname[256];
|
|
void usage(int);
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
int ch, s, ret;
|
|
char *host, *port, *endp;
|
|
struct addrinfo hints;
|
|
socklen_t len;
|
|
|
|
ret = 1;
|
|
s = 0;
|
|
host = NULL;
|
|
port = NULL;
|
|
endp = NULL;
|
|
|
|
strncpy(progname, argv[0], sizeof progname);
|
|
|
|
/* Cruft to make sure options are clean, and used properly. */
|
|
if (argc == 2) {
|
|
host = "localhost";
|
|
port = argv[1];
|
|
} else if (argc == 3) {
|
|
host = argv[1];
|
|
port = argv[2];
|
|
} else {
|
|
usage(1);
|
|
}
|
|
|
|
if (!isatty(STDIN_FILENO))
|
|
errx(1, "not attached to a terminal");
|
|
|
|
raw_term();
|
|
|
|
/* Initialize addrinfo structure */
|
|
memset(&hints, 0, sizeof(struct addrinfo));
|
|
hints.ai_family = AF_UNSPEC;
|
|
hints.ai_socktype = SOCK_STREAM;
|
|
hints.ai_protocol = IPPROTO_TCP;
|
|
|
|
s = remote_connect(host, port, hints);
|
|
ret = 0;
|
|
readwrite(s);
|
|
|
|
if (s)
|
|
close(s);
|
|
|
|
exit(ret);
|
|
}
|
|
|
|
/*
|
|
* remote_connect()
|
|
* Return's a socket connected to a remote host. Properly bind's to a local
|
|
* port or source address if needed. Return's -1 on failure.
|
|
*/
|
|
int
|
|
remote_connect(char *host, char *port, struct addrinfo hints)
|
|
{
|
|
struct addrinfo *res, *res0;
|
|
int s, error;
|
|
|
|
if ((error = getaddrinfo(host, port, &hints, &res)))
|
|
errx(1, "getaddrinfo: %s", gai_strerror(error));
|
|
|
|
res0 = res;
|
|
do {
|
|
if ((s = socket(res0->ai_family, res0->ai_socktype,
|
|
res0->ai_protocol)) < 0)
|
|
continue;
|
|
|
|
if (connect(s, res0->ai_addr, res0->ai_addrlen) == 0)
|
|
break;
|
|
|
|
close(s);
|
|
s = -1;
|
|
} while ((res0 = res0->ai_next) != NULL);
|
|
|
|
freeaddrinfo(res);
|
|
|
|
return (s);
|
|
}
|
|
|
|
/*
|
|
* readwrite()
|
|
* Loop that polls on the network file descriptor and stdin.
|
|
*/
|
|
void
|
|
readwrite(int nfd)
|
|
{
|
|
struct pollfd pfd[2];
|
|
char buf[BUFSIZ];
|
|
int wfd = fileno(stdin), n, ret;
|
|
int lfd = fileno(stdout);
|
|
int escape = 0;
|
|
|
|
/* Setup Network FD */
|
|
pfd[0].fd = nfd;
|
|
pfd[0].events = POLLIN;
|
|
|
|
/* Setup STDIN FD */
|
|
pfd[1].fd = wfd;
|
|
pfd[1].events = POLLIN;
|
|
|
|
while (pfd[0].fd != -1) {
|
|
if ((n = poll(pfd, 2, -1)) < 0) {
|
|
close(nfd);
|
|
err(1, "Polling Error");
|
|
}
|
|
|
|
if (n == 0)
|
|
return;
|
|
|
|
if (pfd[0].revents & POLLIN) {
|
|
if ((n = read(nfd, buf, sizeof(buf))) < 0)
|
|
return;
|
|
else if (n == 0) {
|
|
shutdown(nfd, SHUT_RD);
|
|
pfd[0].fd = -1;
|
|
pfd[0].events = 0;
|
|
} else {
|
|
if ((ret = atomicio(write, lfd, buf, n)) != n)
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (pfd[1].revents & POLLIN) {
|
|
if ((n = read(wfd, buf, sizeof(buf))) < 0)
|
|
return;
|
|
else if (n == 0) {
|
|
shutdown(nfd, SHUT_WR);
|
|
pfd[1].fd = -1;
|
|
pfd[1].events = 0;
|
|
} else {
|
|
if (escape) {
|
|
char buf2[] = "~";
|
|
if (*buf == '.') {
|
|
printf("quit!\n");
|
|
return;
|
|
}
|
|
escape = 0;
|
|
if (*buf != '~' &&
|
|
(ret = atomicio(write, nfd, buf2, 1)) != n)
|
|
return;
|
|
} else {
|
|
escape = (*buf == '~');
|
|
if (escape)
|
|
continue;
|
|
}
|
|
|
|
if ((ret = atomicio(write, nfd, buf, n)) != n)
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
usage(int ret)
|
|
{
|
|
fprintf(stderr, "usage: %s hostname port\n", progname);
|
|
if (ret)
|
|
exit(1);
|
|
}
|
|
|
|
/*
|
|
* Copyright (c) 1995,1999 Theo de Raadt. All rights reserved.
|
|
* All rights reserved.
|
|
*
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
|
|
*/
|
|
|
|
/*
|
|
* ensure all of data on socket comes through. f==read || f==write
|
|
*/
|
|
ssize_t
|
|
atomicio(ssize_t (*f) (), int fd, void *_s, size_t n)
|
|
{
|
|
char *s = _s;
|
|
ssize_t res, pos = 0;
|
|
|
|
while (n > pos) {
|
|
res = (f) (fd, s + pos, n - pos);
|
|
switch (res) {
|
|
case -1:
|
|
if (errno == EINTR || errno == EAGAIN)
|
|
continue;
|
|
case 0:
|
|
return (res);
|
|
default:
|
|
pos += res;
|
|
}
|
|
}
|
|
return (pos);
|
|
}
|
|
|
|
/*
|
|
* Copyright (c) 2003 Nathan L. Binkert <binkertn@umich.edu>
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
|
|
void
|
|
raw_term()
|
|
{
|
|
struct termios ios;
|
|
|
|
if (tcgetattr(STDIN_FILENO, &ios) < 0)
|
|
errx(1, "tcgetagttr\n");
|
|
|
|
memcpy(&saved_ios, &ios, sizeof(struct termios));
|
|
|
|
ios.c_iflag &= ~(ISTRIP|ICRNL|IGNCR|ICRNL|IXOFF|IXON);
|
|
ios.c_oflag &= ~(OPOST);
|
|
ios.c_oflag &= (ONLCR);
|
|
ios.c_lflag &= ~(ISIG|ICANON|ECHO);
|
|
ios.c_cc[VMIN] = 1;
|
|
ios.c_cc[VTIME] = 0;
|
|
|
|
if (tcsetattr(STDIN_FILENO, TCSANOW, &ios) < 0)
|
|
errx(1, "tcsetattr\n");
|
|
|
|
atexit(restore_term);
|
|
}
|
|
|
|
void
|
|
restore_term()
|
|
{
|
|
tcsetattr(STDIN_FILENO, TCSANOW, &saved_ios);
|
|
}
|