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/types.h>
28 #include <sys/socket.h>
29 #include <sys/un.h>
30 #include <inttypes.h>
31 #include <stdarg.h>
32 #include <stdbool.h>
33 #include <stdlib.h>
34
35 #include "uc_common.h"
36 #include "t_generic.h"
37 #include "t_cmsgcred.h"
38 #include "t_cmsgcred_sockcred.h"
39
40 static int
t_cmsgcred_sockcred_server(int fd1)41 t_cmsgcred_sockcred_server(int fd1)
42 {
43 struct msghdr msghdr;
44 struct iovec iov[1];
45 struct cmsghdr *cmsghdr;
46 void *cmsg_data, *cmsg1_data, *cmsg2_data;
47 size_t cmsg_size, cmsg1_size, cmsg2_size;
48 u_int i;
49 int fd2, rv, val;
50
51 fd2 = -1;
52 rv = -2;
53
54 cmsg1_size = CMSG_SPACE(SOCKCREDSIZE(uc_cfg.proc_cred.gid_num));
55 cmsg2_size = CMSG_SPACE(sizeof(struct cmsgcred));
56 cmsg1_data = malloc(cmsg1_size);
57 cmsg2_data = malloc(cmsg2_size);
58 if (cmsg1_data == NULL || cmsg2_data == NULL) {
59 uc_logmsg("malloc");
60 goto done;
61 }
62
63 uc_dbgmsg("setting LOCAL_CREDS");
64 val = 1;
65 if (setsockopt(fd1, 0, LOCAL_CREDS, &val, sizeof(val)) < 0) {
66 uc_logmsg("setsockopt(LOCAL_CREDS)");
67 goto done;
68 }
69
70 if (uc_sync_send() < 0)
71 goto done;
72
73 if (uc_cfg.sock_type == SOCK_STREAM) {
74 fd2 = uc_socket_accept(fd1);
75 if (fd2 < 0)
76 goto done;
77 } else
78 fd2 = fd1;
79
80 cmsg_data = cmsg1_data;
81 cmsg_size = cmsg1_size;
82 rv = -1;
83 for (i = 1; i <= uc_cfg.ipc_msg.msg_num; ++i) {
84 uc_dbgmsg("message #%u", i);
85
86 uc_msghdr_init_server(&msghdr, iov, cmsg_data, cmsg_size);
87 if (uc_message_recv(fd2, &msghdr) < 0) {
88 rv = -2;
89 break;
90 }
91
92 if (uc_check_msghdr(&msghdr, sizeof(*cmsghdr)) < 0)
93 break;
94
95 cmsghdr = CMSG_FIRSTHDR(&msghdr);
96 if (i == 1 || uc_cfg.sock_type == SOCK_DGRAM) {
97 if (uc_check_scm_creds_sockcred(cmsghdr) < 0)
98 break;
99 } else {
100 if (uc_check_scm_creds_cmsgcred(cmsghdr) < 0)
101 break;
102 }
103
104 cmsg_data = cmsg2_data;
105 cmsg_size = cmsg2_size;
106 }
107 if (i > uc_cfg.ipc_msg.msg_num)
108 rv = 0;
109 done:
110 free(cmsg1_data);
111 free(cmsg2_data);
112 if (uc_cfg.sock_type == SOCK_STREAM && fd2 >= 0)
113 if (uc_socket_close(fd2) < 0)
114 rv = -2;
115 return (rv);
116 }
117
118 int
t_cmsgcred_sockcred(void)119 t_cmsgcred_sockcred(void)
120 {
121 return (t_generic(t_cmsgcred_client, t_cmsgcred_sockcred_server));
122 }
123