1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* from kerbd_handle.c 1.3 92/01/29 SMI */
28
29 /*
30 * kwarnd_handle.c, Interface to kwarnd
31 *
32 */
33
34 #include <unistd.h>
35 #include <rpc/rpc.h>
36 #include <rpc/clnt.h>
37 #include <stdio.h>
38 #include <string.h>
39 #include <netconfig.h>
40 #include <sys/utsname.h>
41 #include "kwarnd.h"
42
43 #ifdef DEBUG
44 #define dprt(msg)
45 #else
46 #define dprt(msg)
47 #endif /* DEBUG */
48
49 CLIENT *kwarn_clnt;
50
51 /*
52 * Keep the handle cached. This call may be made quite often.
53 */
54
55 CLIENT *
getkwarnd_handle(void)56 getkwarnd_handle(void)
57 {
58 void *localhandle;
59 struct netconfig *nconf;
60 struct netconfig *tpconf;
61 struct timeval wait_time;
62 struct utsname u;
63 static char *hostname;
64 static bool_t first_time = TRUE;
65
66 /*
67 * Total timeout (in seconds) talking to kwarnd.
68 */
69 #define TOTAL_TIMEOUT 5
70
71 if (kwarn_clnt)
72 return (kwarn_clnt);
73 if (!(localhandle = setnetconfig()))
74 return (NULL);
75 tpconf = NULL;
76 if (first_time == TRUE) {
77 if (uname(&u) == -1) {
78 (void) endnetconfig(localhandle);
79 return ((CLIENT *)NULL);
80 }
81 if ((hostname = strdup(u.nodename)) == (char *)NULL) {
82 (void) endnetconfig(localhandle);
83 return ((CLIENT *)NULL);
84 }
85 first_time = FALSE;
86 }
87 while (nconf = getnetconfig(localhandle)) {
88 if (strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) {
89 if (nconf->nc_semantics == NC_TPI_COTS_ORD) {
90 kwarn_clnt = clnt_tp_create(hostname,
91 KWARNPROG, KWARNVERS, nconf);
92 if (kwarn_clnt) {
93 dprt("got COTS_ORD\n");
94 break;
95 }
96 } else {
97 tpconf = nconf;
98 }
99 }
100 }
101 if ((kwarn_clnt == NULL) && (tpconf)) {
102
103 /* Now, try the connection-oriented loopback transport */
104
105 kwarn_clnt = clnt_tp_create(hostname, KWARNPROG, KWARNVERS,
106 tpconf);
107 #ifdef DEBUG
108 if (kwarn_clnt) {
109 dprt("got COTS\n");
110 }
111 #endif /* DEBUG */
112 }
113 (void) endnetconfig(localhandle);
114
115 /*
116 * This bit of code uses an as yet unimplemented argument to
117 * clnt_control(). CLSET_SVC_PRIV specifies that the underlying
118 * loopback transport should be checked to ensure it is
119 * connected to a process running as root. If so, the clnt_control()
120 * call returns TRUE. If not, it returns FALSE.
121 */
122
123 #ifdef CLSET_SVC_PRIV
124
125 if (clnt_control(kwarn_clnt, CLSET_SVC_PRIV, NULL) != TRUE) {
126 clnt_destroy(kwarn_clnt);
127 kwarn_clnt = NULL;
128 return (NULL);
129 {
130 #endif
131 if (kwarn_clnt == NULL)
132 return (NULL);
133
134 kwarn_clnt->cl_auth = authsys_create("", getuid(), 0, 0, NULL);
135 if (kwarn_clnt->cl_auth == NULL) {
136 clnt_destroy(kwarn_clnt);
137 kwarn_clnt = NULL;
138 return (NULL);
139 }
140 wait_time.tv_sec = TOTAL_TIMEOUT;
141 wait_time.tv_usec = 0;
142 (void) clnt_control(kwarn_clnt, CLSET_TIMEOUT, (char *)&wait_time);
143
144 return (kwarn_clnt);
145 }
146
147 void
148 resetkwarnd_handle(void)
149 {
150 auth_destroy(kwarn_clnt->cl_auth);
151 clnt_destroy(kwarn_clnt);
152 kwarn_clnt = NULL;
153 }
154