2 * Copyright 2001 Niels Provos <provos@citi.umich.edu>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 RCSID("$OpenBSD: monitor_fdpass.c,v 1.2 2002/03/24 17:53:16 stevesk Exp $");
32 #include "monitor_fdpass.h"
35 mm_send_fd(int socket, int fd)
37 #if defined(HAVE_SENDMSG) && (defined(HAVE_ACCRIGHTS_IN_MSGHDR) || defined(HAVE_CONTROL_IN_MSGHDR))
42 #ifndef HAVE_ACCRIGHTS_IN_MSGHDR
43 char tmp[CMSG_SPACE(sizeof(int))];
47 memset(&msg, 0, sizeof(msg));
48 #ifdef HAVE_ACCRIGHTS_IN_MSGHDR
49 msg.msg_accrights = (caddr_t)&fd;
50 msg.msg_accrightslen = sizeof(fd);
52 msg.msg_control = (caddr_t)tmp;
53 msg.msg_controllen = CMSG_LEN(sizeof(int));
54 cmsg = CMSG_FIRSTHDR(&msg);
55 cmsg->cmsg_len = CMSG_LEN(sizeof(int));
56 cmsg->cmsg_level = SOL_SOCKET;
57 cmsg->cmsg_type = SCM_RIGHTS;
58 *(int *)CMSG_DATA(cmsg) = fd;
66 if ((n = sendmsg(socket, &msg, 0)) == -1)
67 fatal("%s: sendmsg(%d): %s", __FUNCTION__, fd,
70 fatal("%s: sendmsg: expected sent 1 got %d",
73 fatal("%s: UsePrivilegeSeparation=yes not supported",
79 mm_receive_fd(int socket)
81 #if defined(HAVE_RECVMSG) && (defined(HAVE_ACCRIGHTS_IN_MSGHDR) || defined(HAVE_CONTROL_IN_MSGHDR))
86 #ifndef HAVE_ACCRIGHTS_IN_MSGHDR
87 char tmp[CMSG_SPACE(sizeof(int))];
91 memset(&msg, 0, sizeof(msg));
96 #ifdef HAVE_ACCRIGHTS_IN_MSGHDR
97 msg.msg_accrights = (caddr_t)&fd;
98 msg.msg_accrightslen = sizeof(fd);
100 msg.msg_control = tmp;
101 msg.msg_controllen = sizeof(tmp);
104 if ((n = recvmsg(socket, &msg, 0)) == -1)
105 fatal("%s: recvmsg: %s", __FUNCTION__, strerror(errno));
107 fatal("%s: recvmsg: expected received 1 got %d",
110 #ifdef HAVE_ACCRIGHTS_IN_MSGHDR
111 if (msg.msg_accrightslen != sizeof(fd))
112 fatal("%s: no fd", __FUNCTION__);
114 cmsg = CMSG_FIRSTHDR(&msg);
115 if (cmsg->cmsg_type != SCM_RIGHTS)
116 fatal("%s: expected type %d got %d", __FUNCTION__,
117 SCM_RIGHTS, cmsg->cmsg_type);
118 fd = (*(int *)CMSG_DATA(cmsg));
122 fatal("%s: UsePrivilegeSeparation=yes not supported",