/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* University Copyright- Copyright (c) 1982, 1986, 1988
* The Regents of the University of California
* All Rights Reserved
*
* University Acknowledgment- Portions of this document are derived from
* software developed by the University of California, Berkeley, and its
* contributors.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <stdio.h>
#include <netdb.h>
#include <errno.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <libintl.h>
#ifdef SYSV
#define bcopy(a, b, c) (void) memcpy((b), (a), (c))
#endif
#define MAX_SHORTSTRLEN 6
void _ruserpass(const char *host, char **aname, char **apass);
int rexec(char **ahost, unsigned short rport, const char *name,
const char *pass, const char *cmd, int *fd2p)
{
return (rexec_af(ahost, rport, name, pass, cmd, fd2p, AF_INET));
}
int rexec_af(char **ahost, unsigned short rport, const char *name,
const char *pass, const char *cmd, int *fd2p, int af)
{
int s, timo = 1, s3;
char c;
ushort_t port;
static char hostname[MAXHOSTNAMELEN];
int rc;
struct addrinfo *res;
struct addrinfo hints;
char aport[MAX_SHORTSTRLEN];
if (!(af == AF_INET || af == AF_INET6 || af == AF_UNSPEC)) {
(void) fprintf(stderr,
dgettext(TEXT_DOMAIN, "%d: Address family not "
"supported\n"), af);
errno = EAFNOSUPPORT;
return (-1);
}
memset(&hints, 0, sizeof (hints));
(void) snprintf(aport, MAX_SHORTSTRLEN, "%u", ntohs(rport));
hints.ai_flags = AI_CANONNAME|AI_ADDRCONFIG|AI_V4MAPPED;
hints.ai_socktype = SOCK_STREAM;
hints.ai_family = af;
rc = getaddrinfo(*ahost, aport, &hints, &res);
if (rc != 0) {
(void) fprintf(stderr,
dgettext(TEXT_DOMAIN, "%s: unknown host\n"),
*ahost);
return (-1);
}
(void) strlcpy(hostname, res->ai_canonname, MAXHOSTNAMELEN);
*ahost = hostname;
_ruserpass(res->ai_canonname, (char **)&name, (char **)&pass);
retry:
s = socket(res->ai_addr->sa_family, res->ai_socktype, res->ai_protocol);
if (s < 0) {
perror("rexec: socket");
freeaddrinfo(res);
return (-1);
}
if (connect(s, res->ai_addr, res->ai_addrlen) != 0) {
if (errno == ECONNREFUSED && timo <= 16) {
(void) close(s);
(void) sleep(timo);
timo *= 2;
goto retry;
}
perror(*ahost);
(void) close(s);
freeaddrinfo(res);
return (-1);
}
if (fd2p == 0) {
(void) write(s, "", 1);
port = 0;
} else {
int s2;
socklen_t sin2len;
struct sockaddr_storage sin2, from;
s2 = socket(res->ai_family, SOCK_STREAM, 0);
if (s2 < 0) {
(void) close(s);
freeaddrinfo(res);
return (-1);
}
(void) listen(s2, 1);
sin2len = (socklen_t)sizeof (sin2);
if (getsockname(s2, (struct sockaddr *)&sin2, &sin2len) < 0) {
perror("getsockname");
(void) close(s2);
goto bad;
}
if (res->ai_family == AF_INET6) {
port = ntohs(((struct sockaddr_in6 *)&sin2)->sin6_port);
} else {
port = ntohs(((struct sockaddr_in *)&sin2)->sin_port);
}
(void) snprintf(aport, MAX_SHORTSTRLEN, "%u", port);
(void) write(s, aport, strlen(aport)+1);
{
socklen_t len = (socklen_t)sizeof (from);
s3 = accept(s2, (struct sockaddr *)&from, &len);
(void) close(s2);
if (s3 < 0) {
perror("accept");
port = 0;
goto bad;
}
}
*fd2p = s3;
}
(void) write(s, name, strlen(name) + 1);
/* should public key encypt the password here */
(void) write(s, pass, strlen(pass) + 1);
(void) write(s, cmd, strlen(cmd) + 1);
if (read(s, &c, 1) != 1) {
perror(*ahost);
goto bad;
}
if (c != 0) {
while (read(s, &c, 1) == 1) {
(void) write(2, &c, 1);
if (c == '\n')
break;
}
goto bad;
}
freeaddrinfo(res);
return (s);
bad:
if (port)
(void) close(*fd2p);
(void) close(s);
freeaddrinfo(res);
return (-1);
}