1 /*-
2 * Copyright (c) 2005 Andrey Simonenko
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 #include <sys/types.h>
29 #include <sys/socket.h>
30 #include <sys/un.h>
31 #include <inttypes.h>
32 #include <stdarg.h>
33 #include <stdbool.h>
34 #include <stdlib.h>
35
36 #include "uc_common.h"
37 #include "t_generic.h"
38 #include "t_cmsgcred.h"
39
40 int
t_cmsgcred_client(int fd)41 t_cmsgcred_client(int fd)
42 {
43 struct msghdr msghdr;
44 struct iovec iov[1];
45 void *cmsg_data;
46 size_t cmsg_size;
47 int rv;
48
49 if (uc_sync_recv() < 0)
50 return (-2);
51
52 rv = -2;
53
54 cmsg_size = CMSG_SPACE(sizeof(struct cmsgcred));
55 cmsg_data = malloc(cmsg_size);
56 if (cmsg_data == NULL) {
57 uc_logmsg("malloc");
58 goto done;
59 }
60 uc_msghdr_init_client(&msghdr, iov, cmsg_data, cmsg_size,
61 SCM_CREDS, sizeof(struct cmsgcred));
62
63 if (uc_socket_connect(fd) < 0)
64 goto done;
65
66 if (uc_message_sendn(fd, &msghdr) < 0)
67 goto done;
68
69 rv = 0;
70 done:
71 free(cmsg_data);
72 return (rv);
73 }
74
75 static int
t_cmsgcred_server(int fd1)76 t_cmsgcred_server(int fd1)
77 {
78 struct msghdr msghdr;
79 struct iovec iov[1];
80 struct cmsghdr *cmsghdr;
81 void *cmsg_data;
82 size_t cmsg_size;
83 u_int i;
84 int fd2, rv;
85
86 if (uc_sync_send() < 0)
87 return (-2);
88
89 fd2 = -1;
90 rv = -2;
91
92 cmsg_size = CMSG_SPACE(sizeof(struct cmsgcred));
93 cmsg_data = malloc(cmsg_size);
94 if (cmsg_data == NULL) {
95 uc_logmsg("malloc");
96 goto done;
97 }
98
99 if (uc_cfg.sock_type == SOCK_STREAM) {
100 fd2 = uc_socket_accept(fd1);
101 if (fd2 < 0)
102 goto done;
103 } else
104 fd2 = fd1;
105
106 rv = -1;
107 for (i = 1; i <= uc_cfg.ipc_msg.msg_num; ++i) {
108 uc_dbgmsg("message #%u", i);
109
110 uc_msghdr_init_server(&msghdr, iov, cmsg_data, cmsg_size);
111 if (uc_message_recv(fd2, &msghdr) < 0) {
112 rv = -2;
113 break;
114 }
115
116 if (uc_check_msghdr(&msghdr, sizeof(*cmsghdr)) < 0)
117 break;
118
119 cmsghdr = CMSG_FIRSTHDR(&msghdr);
120 if (uc_check_scm_creds_cmsgcred(cmsghdr) < 0)
121 break;
122 }
123 if (i > uc_cfg.ipc_msg.msg_num)
124 rv = 0;
125 done:
126 free(cmsg_data);
127 if (uc_cfg.sock_type == SOCK_STREAM && fd2 >= 0)
128 if (uc_socket_close(fd2) < 0)
129 rv = -2;
130 return (rv);
131 }
132
133 int
t_cmsgcred(void)134 t_cmsgcred(void)
135 {
136 return (t_generic(t_cmsgcred_client, t_cmsgcred_server));
137 }
138