зеркало из https://github.com/Azure/sonic-openssh.git
129 строки
3.7 KiB
C
129 строки
3.7 KiB
C
/*
|
|
* Copyright 2001 Niels Provos <provos@citi.umich.edu>
|
|
* 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.
|
|
*/
|
|
|
|
#include "includes.h"
|
|
RCSID("$OpenBSD: monitor_fdpass.c,v 1.4 2002/06/26 14:50:04 deraadt Exp $");
|
|
|
|
#include <sys/uio.h>
|
|
|
|
#include "log.h"
|
|
#include "monitor_fdpass.h"
|
|
|
|
void
|
|
mm_send_fd(int socket, int fd)
|
|
{
|
|
#if defined(HAVE_SENDMSG) && (defined(HAVE_ACCRIGHTS_IN_MSGHDR) || defined(HAVE_CONTROL_IN_MSGHDR))
|
|
struct msghdr msg;
|
|
struct iovec vec;
|
|
char ch = '\0';
|
|
ssize_t n;
|
|
#ifndef HAVE_ACCRIGHTS_IN_MSGHDR
|
|
char tmp[CMSG_SPACE(sizeof(int))];
|
|
struct cmsghdr *cmsg;
|
|
#endif
|
|
|
|
memset(&msg, 0, sizeof(msg));
|
|
#ifdef HAVE_ACCRIGHTS_IN_MSGHDR
|
|
msg.msg_accrights = (caddr_t)&fd;
|
|
msg.msg_accrightslen = sizeof(fd);
|
|
#else
|
|
msg.msg_control = (caddr_t)tmp;
|
|
msg.msg_controllen = CMSG_LEN(sizeof(int));
|
|
cmsg = CMSG_FIRSTHDR(&msg);
|
|
cmsg->cmsg_len = CMSG_LEN(sizeof(int));
|
|
cmsg->cmsg_level = SOL_SOCKET;
|
|
cmsg->cmsg_type = SCM_RIGHTS;
|
|
*(int *)CMSG_DATA(cmsg) = fd;
|
|
#endif
|
|
|
|
vec.iov_base = &ch;
|
|
vec.iov_len = 1;
|
|
msg.msg_iov = &vec;
|
|
msg.msg_iovlen = 1;
|
|
|
|
if ((n = sendmsg(socket, &msg, 0)) == -1)
|
|
fatal("%s: sendmsg(%d): %s", __func__, fd,
|
|
strerror(errno));
|
|
if (n != 1)
|
|
fatal("%s: sendmsg: expected sent 1 got %ld",
|
|
__func__, (long)n);
|
|
#else
|
|
fatal("%s: UsePrivilegeSeparation=yes not supported",
|
|
__func__);
|
|
#endif
|
|
}
|
|
|
|
int
|
|
mm_receive_fd(int socket)
|
|
{
|
|
#if defined(HAVE_RECVMSG) && (defined(HAVE_ACCRIGHTS_IN_MSGHDR) || defined(HAVE_CONTROL_IN_MSGHDR))
|
|
struct msghdr msg;
|
|
struct iovec vec;
|
|
ssize_t n;
|
|
char ch;
|
|
int fd;
|
|
#ifndef HAVE_ACCRIGHTS_IN_MSGHDR
|
|
char tmp[CMSG_SPACE(sizeof(int))];
|
|
struct cmsghdr *cmsg;
|
|
#endif
|
|
|
|
memset(&msg, 0, sizeof(msg));
|
|
vec.iov_base = &ch;
|
|
vec.iov_len = 1;
|
|
msg.msg_iov = &vec;
|
|
msg.msg_iovlen = 1;
|
|
#ifdef HAVE_ACCRIGHTS_IN_MSGHDR
|
|
msg.msg_accrights = (caddr_t)&fd;
|
|
msg.msg_accrightslen = sizeof(fd);
|
|
#else
|
|
msg.msg_control = tmp;
|
|
msg.msg_controllen = sizeof(tmp);
|
|
#endif
|
|
|
|
if ((n = recvmsg(socket, &msg, 0)) == -1)
|
|
fatal("%s: recvmsg: %s", __func__, strerror(errno));
|
|
if (n != 1)
|
|
fatal("%s: recvmsg: expected received 1 got %ld",
|
|
__func__, (long)n);
|
|
|
|
#ifdef HAVE_ACCRIGHTS_IN_MSGHDR
|
|
if (msg.msg_accrightslen != sizeof(fd))
|
|
fatal("%s: no fd", __func__);
|
|
#else
|
|
cmsg = CMSG_FIRSTHDR(&msg);
|
|
#ifndef BROKEN_CMSG_TYPE
|
|
if (cmsg->cmsg_type != SCM_RIGHTS)
|
|
fatal("%s: expected type %d got %d", __func__,
|
|
SCM_RIGHTS, cmsg->cmsg_type);
|
|
#endif
|
|
fd = (*(int *)CMSG_DATA(cmsg));
|
|
#endif
|
|
return fd;
|
|
#else
|
|
fatal("%s: UsePrivilegeSeparation=yes not supported",
|
|
__func__);
|
|
#endif
|
|
}
|