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author | des <des@FreeBSD.org> | 2008-07-22 18:58:19 +0000 |
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committer | des <des@FreeBSD.org> | 2008-07-22 18:58:19 +0000 |
commit | 666aa9cc1660793c97ef29a6cb66dfbb894dde8f (patch) | |
tree | 209e642fbe2a816041f67bc27c9800879f5541bc /crypto/openssh/monitor_fdpass.c | |
parent | 624d93001f28e236c027516d88282351eb7bffbe (diff) | |
download | FreeBSD-src-666aa9cc1660793c97ef29a6cb66dfbb894dde8f.zip FreeBSD-src-666aa9cc1660793c97ef29a6cb66dfbb894dde8f.tar.gz |
Revert part of 180714 - the intent was to flatten dist, not to nuke it.
Diffstat (limited to 'crypto/openssh/monitor_fdpass.c')
-rw-r--r-- | crypto/openssh/monitor_fdpass.c | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/crypto/openssh/monitor_fdpass.c b/crypto/openssh/monitor_fdpass.c new file mode 100644 index 0000000..9f8e9cd --- /dev/null +++ b/crypto/openssh/monitor_fdpass.c @@ -0,0 +1,139 @@ +/* $OpenBSD: monitor_fdpass.c,v 1.12 2006/08/03 03:34:42 deraadt Exp $ */ +/* + * 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" + +#include <sys/types.h> +#include <sys/socket.h> +#include <sys/uio.h> +#ifdef HAVE_SYS_UN_H +#include <sys/un.h> +#endif + +#include <errno.h> +#include <string.h> +#include <stdarg.h> + +#include "log.h" +#include "monitor_fdpass.h" + +void +mm_send_fd(int sock, 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(sock, &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 sock) +{ +#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(sock, &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); + if (cmsg == NULL) + fatal("%s: no message header", __func__); +#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 +} |