resource manager: add optional resource id.
[dragonfly.git] / usr.sbin / pflogd / privsep_fdpass.c
blob50bfad0627f36429b03fe968fd32b86fd3dca230
1 /* $OpenBSD: privsep_fdpass.c,v 1.1 2003/10/22 18:51:55 canacar Exp $ */
2 /* $DragonFly: src/usr.sbin/pflogd/privsep_fdpass.c,v 1.1 2004/09/21 21:25:28 joerg Exp $ */
4 /*
5 * Copyright 2001 Niels Provos <provos@citi.umich.edu>
6 * All rights reserved.
8 * Copyright (c) 2002 Matthieu Herrb
9 * All rights reserved.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
15 * - Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * - Redistributions in binary form must reproduce the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer in the documentation and/or other materials provided
20 * with the distribution.
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
25 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
26 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
28 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
29 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
30 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
32 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
33 * POSSIBILITY OF SUCH DAMAGE.
35 #include <sys/param.h>
36 #include <sys/uio.h>
37 #include <sys/types.h>
38 #include <sys/socket.h>
39 #include <sys/stat.h>
40 #include <err.h>
41 #include <errno.h>
42 #include <fcntl.h>
43 #include <signal.h>
44 #include <stdio.h>
45 #include <stdlib.h>
46 #include <string.h>
47 #include <unistd.h>
48 #include "pflogd.h"
50 void
51 send_fd(int sock, int fd)
53 struct msghdr msg;
54 char tmp[CMSG_SPACE(sizeof(int))];
55 struct cmsghdr *cmsg;
56 struct iovec vec;
57 int result = 0;
58 ssize_t n;
60 memset(&msg, 0, sizeof(msg));
62 if (fd >= 0) {
63 msg.msg_control = (caddr_t)tmp;
64 msg.msg_controllen = CMSG_LEN(sizeof(int));
65 cmsg = CMSG_FIRSTHDR(&msg);
66 cmsg->cmsg_len = CMSG_LEN(sizeof(int));
67 cmsg->cmsg_level = SOL_SOCKET;
68 cmsg->cmsg_type = SCM_RIGHTS;
69 *(int *)CMSG_DATA(cmsg) = fd;
70 } else {
71 result = errno;
74 vec.iov_base = (caddr_t)&result;
75 vec.iov_len = sizeof(int);
76 msg.msg_iov = &vec;
77 msg.msg_iovlen = 1;
79 if ((n = sendmsg(sock, &msg, 0)) == -1)
80 warn("%s: sendmsg(%d)", __func__, sock);
81 if (n != sizeof(int))
82 warnx("%s: sendmsg: expected sent 1 got %ld",
83 __func__, (long)n);
86 int
87 receive_fd(int sock)
89 struct msghdr msg;
90 char tmp[CMSG_SPACE(sizeof(int))];
91 struct cmsghdr *cmsg;
92 struct iovec vec;
93 ssize_t n;
94 int result;
95 int fd;
97 memset(&msg, 0, sizeof(msg));
98 vec.iov_base = (caddr_t)&result;
99 vec.iov_len = sizeof(int);
100 msg.msg_iov = &vec;
101 msg.msg_iovlen = 1;
102 msg.msg_control = tmp;
103 msg.msg_controllen = sizeof(tmp);
105 if ((n = recvmsg(sock, &msg, 0)) == -1)
106 warn("%s: recvmsg", __func__);
107 if (n != sizeof(int))
108 warnx("%s: recvmsg: expected received 1 got %ld",
109 __func__, (long)n);
110 if (result == 0) {
111 cmsg = CMSG_FIRSTHDR(&msg);
112 if (cmsg->cmsg_type != SCM_RIGHTS)
113 warnx("%s: expected type %d got %d", __func__,
114 SCM_RIGHTS, cmsg->cmsg_type);
115 fd = (*(int *)CMSG_DATA(cmsg));
116 return fd;
117 } else {
118 errno = result;
119 return -1;