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, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
23 /* All Rights Reserved */
24
25 /*
26 *
27 * nlsrequest(3):
28 *
29 * Send service request message to remote listener
30 * on previously established virtual circuit to remote
31 * listener process.
32 *
33 * If an error occurrs, t_errno will contain an error code.
34 *
35 * Setting the external integer "_nlslog" to any non-zero
36 * value before calling nlsrequest, will cause nlsrequest
37 * to print debug information on stderr.
38 *
39 * client/server process pairs should include their own
40 * initial handshake to insure connectivity.
41 *
42 * This version of nlsrequest includes the
43 * service request response message.
44 */
45
46
47 #include <stdio.h>
48 #include <ctype.h>
49 #include <fcntl.h>
50 #include <errno.h>
51 #include <string.h>
52 #include <stdlib.h>
53 #include <sys/tiuser.h>
54 #include "listen.h"
55
56 extern int _nlslog; /* non-zero allows use of stderr */
57 char *_nlsrmsg = (char *)0;
58 static char _nlsbuf[256];
59
60
61 int
nlsrequest(int fd,char * svc_code)62 nlsrequest(int fd, char *svc_code)
63 {
64 int len, err, flags;
65 char buf[256];
66 char *p;
67 int ret;
68 extern int t_errno;
69
70 t_errno = 0; /* indicates a 'name' problem */
71 buf[0] = 0;
72
73 /*
74 * Validate service code
75 */
76
77 if (!svc_code || !strlen(svc_code) ||
78 (strlen(svc_code) >= (size_t)SVC_CODE_SZ)) {
79 if (_nlslog) {
80 fprintf(stderr,
81 "nlsrequest: invalid service code format\n");
82 }
83 return (-1);
84 }
85
86 /*
87 * send protocol message requesting the service
88 */
89
90 len = sprintf(buf, nls_v2_msg, svc_code) + 1; /* inc trailing null */
91
92 if (t_snd(fd, buf, len, 0) < len) {
93 if (_nlslog)
94 t_error("t_snd of listener request message failed");
95 return (-1);
96 }
97
98 p = _nlsbuf;
99 len = 0;
100
101 do {
102 if (++len > sizeof (_nlsbuf)) {
103 if (_nlslog) {
104 fprintf(stderr,
105 "nlsrequest: _nlsbuf not large enough\n");
106 }
107 return (-1);
108 }
109 if (t_rcv(fd, p, sizeof (char), &flags) != sizeof (char)) {
110 if (_nlslog) {
111 t_error("t_rcv of listener response msg "
112 "failed");
113 }
114 return (-1);
115 }
116
117 } while (*p++ != '\0');
118
119
120 if ((p = strtok(_nlsbuf, ":")) == NULL)
121 goto parsefail;
122
123 /*
124 * We ignore the version number here as we do not have any use for it.
125 * Previous versions of the code looked at it by calling atoi() on it,
126 * which did not mutate the actual string and did not use it.
127 */
128
129 if ((p = strtok(NULL, ":")) == NULL)
130 goto parsefail;
131 ret = atoi(p);
132 _nlsrmsg = p + strlen(p) + 1;
133 if (ret && _nlslog)
134 fprintf(stderr, "%s\n", _nlsrmsg); /* debug only */
135 return (ret);
136
137 parsefail:
138 if (_nlslog) {
139 fprintf(stderr,
140 "nlsrequest: failed parse of response message\n");
141 }
142 return (-1);
143 }
144