1*7c478bd9Sstevel@tonic-gate /*
2*7c478bd9Sstevel@tonic-gate * CDDL HEADER START
3*7c478bd9Sstevel@tonic-gate *
4*7c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*7c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*7c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*7c478bd9Sstevel@tonic-gate * with the License.
8*7c478bd9Sstevel@tonic-gate *
9*7c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*7c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*7c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions
12*7c478bd9Sstevel@tonic-gate * and limitations under the License.
13*7c478bd9Sstevel@tonic-gate *
14*7c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*7c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*7c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*7c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*7c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*7c478bd9Sstevel@tonic-gate *
20*7c478bd9Sstevel@tonic-gate * CDDL HEADER END
21*7c478bd9Sstevel@tonic-gate */
22*7c478bd9Sstevel@tonic-gate /*
23*7c478bd9Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
24*7c478bd9Sstevel@tonic-gate * Use is subject to license terms.
25*7c478bd9Sstevel@tonic-gate */
26*7c478bd9Sstevel@tonic-gate
27*7c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
28*7c478bd9Sstevel@tonic-gate
29*7c478bd9Sstevel@tonic-gate #include <sys/stat.h>
30*7c478bd9Sstevel@tonic-gate #include <sys/types.h>
31*7c478bd9Sstevel@tonic-gate #include <fcntl.h>
32*7c478bd9Sstevel@tonic-gate #include <sys/openpromio.h>
33*7c478bd9Sstevel@tonic-gate #include <stdlib.h>
34*7c478bd9Sstevel@tonic-gate #include <string.h>
35*7c478bd9Sstevel@tonic-gate #include <stdio.h> /* sprintf() */
36*7c478bd9Sstevel@tonic-gate #include <unistd.h>
37*7c478bd9Sstevel@tonic-gate
38*7c478bd9Sstevel@tonic-gate /*
39*7c478bd9Sstevel@tonic-gate * opp_zalloc(): allocates and initializes a struct openpromio
40*7c478bd9Sstevel@tonic-gate *
41*7c478bd9Sstevel@tonic-gate * input: size_t: the size of the variable-length part of the openpromio
42*7c478bd9Sstevel@tonic-gate * const char *: an initial value for oprom_array, if non-NULL
43*7c478bd9Sstevel@tonic-gate * output: struct openpromio: the allocated, initialized openpromio
44*7c478bd9Sstevel@tonic-gate */
45*7c478bd9Sstevel@tonic-gate
46*7c478bd9Sstevel@tonic-gate static struct openpromio *
opp_zalloc(size_t size,const char * prop)47*7c478bd9Sstevel@tonic-gate opp_zalloc(size_t size, const char *prop)
48*7c478bd9Sstevel@tonic-gate {
49*7c478bd9Sstevel@tonic-gate struct openpromio *opp = malloc(sizeof (struct openpromio) + size);
50*7c478bd9Sstevel@tonic-gate
51*7c478bd9Sstevel@tonic-gate if (opp != NULL) {
52*7c478bd9Sstevel@tonic-gate (void) memset(opp, 0, sizeof (struct openpromio) + size);
53*7c478bd9Sstevel@tonic-gate opp->oprom_size = size;
54*7c478bd9Sstevel@tonic-gate if (prop != NULL)
55*7c478bd9Sstevel@tonic-gate (void) strcpy(opp->oprom_array, prop);
56*7c478bd9Sstevel@tonic-gate }
57*7c478bd9Sstevel@tonic-gate return (opp);
58*7c478bd9Sstevel@tonic-gate }
59*7c478bd9Sstevel@tonic-gate
60*7c478bd9Sstevel@tonic-gate /*
61*7c478bd9Sstevel@tonic-gate * goto_rootnode(): moves to the root of the devinfo tree
62*7c478bd9Sstevel@tonic-gate *
63*7c478bd9Sstevel@tonic-gate * input: int: an open descriptor to /dev/openprom
64*7c478bd9Sstevel@tonic-gate * output: int: nonzero on success
65*7c478bd9Sstevel@tonic-gate */
66*7c478bd9Sstevel@tonic-gate
67*7c478bd9Sstevel@tonic-gate static int
goto_rootnode(int prom_fd)68*7c478bd9Sstevel@tonic-gate goto_rootnode(int prom_fd)
69*7c478bd9Sstevel@tonic-gate {
70*7c478bd9Sstevel@tonic-gate struct openpromio op = { sizeof (int), 0 };
71*7c478bd9Sstevel@tonic-gate
72*7c478bd9Sstevel@tonic-gate /* zero it explicitly since a union is involved */
73*7c478bd9Sstevel@tonic-gate op.oprom_node = 0;
74*7c478bd9Sstevel@tonic-gate return (ioctl(prom_fd, OPROMNEXT, &op) == 0);
75*7c478bd9Sstevel@tonic-gate }
76*7c478bd9Sstevel@tonic-gate
77*7c478bd9Sstevel@tonic-gate /*
78*7c478bd9Sstevel@tonic-gate * return_property(): returns the value of a given property
79*7c478bd9Sstevel@tonic-gate *
80*7c478bd9Sstevel@tonic-gate * input: int: an open descriptor to /dev/openprom
81*7c478bd9Sstevel@tonic-gate * const char *: the property to look for in the current devinfo node
82*7c478bd9Sstevel@tonic-gate * output: the value of that property (dynamically allocated)
83*7c478bd9Sstevel@tonic-gate */
84*7c478bd9Sstevel@tonic-gate
85*7c478bd9Sstevel@tonic-gate static char *
return_property(int prom_fd,const char * prop)86*7c478bd9Sstevel@tonic-gate return_property(int prom_fd, const char *prop)
87*7c478bd9Sstevel@tonic-gate {
88*7c478bd9Sstevel@tonic-gate int proplen;
89*7c478bd9Sstevel@tonic-gate char *result;
90*7c478bd9Sstevel@tonic-gate struct openpromio *opp = opp_zalloc(strlen(prop) + 1, prop);
91*7c478bd9Sstevel@tonic-gate
92*7c478bd9Sstevel@tonic-gate if (opp == NULL)
93*7c478bd9Sstevel@tonic-gate return (NULL);
94*7c478bd9Sstevel@tonic-gate
95*7c478bd9Sstevel@tonic-gate if (ioctl(prom_fd, OPROMGETPROPLEN, opp) == -1) {
96*7c478bd9Sstevel@tonic-gate free(opp);
97*7c478bd9Sstevel@tonic-gate return (NULL);
98*7c478bd9Sstevel@tonic-gate }
99*7c478bd9Sstevel@tonic-gate
100*7c478bd9Sstevel@tonic-gate proplen = opp->oprom_len;
101*7c478bd9Sstevel@tonic-gate if (proplen > (strlen(prop) + 1)) {
102*7c478bd9Sstevel@tonic-gate free(opp);
103*7c478bd9Sstevel@tonic-gate opp = opp_zalloc(proplen, prop);
104*7c478bd9Sstevel@tonic-gate if (opp == NULL)
105*7c478bd9Sstevel@tonic-gate return (NULL);
106*7c478bd9Sstevel@tonic-gate }
107*7c478bd9Sstevel@tonic-gate
108*7c478bd9Sstevel@tonic-gate if (ioctl(prom_fd, OPROMGETPROP, opp) == -1) {
109*7c478bd9Sstevel@tonic-gate free(opp);
110*7c478bd9Sstevel@tonic-gate return (NULL);
111*7c478bd9Sstevel@tonic-gate }
112*7c478bd9Sstevel@tonic-gate
113*7c478bd9Sstevel@tonic-gate result = strdup(opp->oprom_array);
114*7c478bd9Sstevel@tonic-gate free(opp);
115*7c478bd9Sstevel@tonic-gate return (result);
116*7c478bd9Sstevel@tonic-gate }
117*7c478bd9Sstevel@tonic-gate
118*7c478bd9Sstevel@tonic-gate /*
119*7c478bd9Sstevel@tonic-gate * sanitize_class_id(): translates the class id into a canonical format,
120*7c478bd9Sstevel@tonic-gate * so that it can be used easily with dhcptab(4).
121*7c478bd9Sstevel@tonic-gate *
122*7c478bd9Sstevel@tonic-gate * input: char *: the class id to canonicalize
123*7c478bd9Sstevel@tonic-gate * output: void
124*7c478bd9Sstevel@tonic-gate */
125*7c478bd9Sstevel@tonic-gate
126*7c478bd9Sstevel@tonic-gate static void
sanitize_class_id(char * src_ptr)127*7c478bd9Sstevel@tonic-gate sanitize_class_id(char *src_ptr)
128*7c478bd9Sstevel@tonic-gate {
129*7c478bd9Sstevel@tonic-gate char *dst_ptr = src_ptr;
130*7c478bd9Sstevel@tonic-gate
131*7c478bd9Sstevel@tonic-gate /* remove all spaces and change all commas to periods */
132*7c478bd9Sstevel@tonic-gate while (*src_ptr != '\0') {
133*7c478bd9Sstevel@tonic-gate
134*7c478bd9Sstevel@tonic-gate switch (*src_ptr) {
135*7c478bd9Sstevel@tonic-gate
136*7c478bd9Sstevel@tonic-gate case ' ':
137*7c478bd9Sstevel@tonic-gate break;
138*7c478bd9Sstevel@tonic-gate
139*7c478bd9Sstevel@tonic-gate case ',':
140*7c478bd9Sstevel@tonic-gate *dst_ptr++ = '.';
141*7c478bd9Sstevel@tonic-gate break;
142*7c478bd9Sstevel@tonic-gate
143*7c478bd9Sstevel@tonic-gate default:
144*7c478bd9Sstevel@tonic-gate *dst_ptr++ = *src_ptr;
145*7c478bd9Sstevel@tonic-gate break;
146*7c478bd9Sstevel@tonic-gate }
147*7c478bd9Sstevel@tonic-gate src_ptr++;
148*7c478bd9Sstevel@tonic-gate }
149*7c478bd9Sstevel@tonic-gate *dst_ptr = '\0';
150*7c478bd9Sstevel@tonic-gate }
151*7c478bd9Sstevel@tonic-gate
152*7c478bd9Sstevel@tonic-gate /*
153*7c478bd9Sstevel@tonic-gate * get_class_id(): retrieves the class id from the prom, then canonicalizes it
154*7c478bd9Sstevel@tonic-gate *
155*7c478bd9Sstevel@tonic-gate * input: void
156*7c478bd9Sstevel@tonic-gate * output: char *: the class id (dynamically allocated and sanitized)
157*7c478bd9Sstevel@tonic-gate */
158*7c478bd9Sstevel@tonic-gate
159*7c478bd9Sstevel@tonic-gate char *
get_class_id(void)160*7c478bd9Sstevel@tonic-gate get_class_id(void)
161*7c478bd9Sstevel@tonic-gate {
162*7c478bd9Sstevel@tonic-gate int prom_fd;
163*7c478bd9Sstevel@tonic-gate char *name, *class_id = NULL;
164*7c478bd9Sstevel@tonic-gate size_t len;
165*7c478bd9Sstevel@tonic-gate
166*7c478bd9Sstevel@tonic-gate prom_fd = open("/dev/openprom", O_RDONLY);
167*7c478bd9Sstevel@tonic-gate if (prom_fd == -1)
168*7c478bd9Sstevel@tonic-gate return (NULL);
169*7c478bd9Sstevel@tonic-gate
170*7c478bd9Sstevel@tonic-gate if (goto_rootnode(prom_fd) == 0) {
171*7c478bd9Sstevel@tonic-gate (void) close(prom_fd);
172*7c478bd9Sstevel@tonic-gate return (NULL);
173*7c478bd9Sstevel@tonic-gate }
174*7c478bd9Sstevel@tonic-gate
175*7c478bd9Sstevel@tonic-gate /*
176*7c478bd9Sstevel@tonic-gate * the `name' property is the same as the result of `uname -i', modulo
177*7c478bd9Sstevel@tonic-gate * some stylistic issues we fix up via sanitize_class_id() below.
178*7c478bd9Sstevel@tonic-gate */
179*7c478bd9Sstevel@tonic-gate
180*7c478bd9Sstevel@tonic-gate name = return_property(prom_fd, "name");
181*7c478bd9Sstevel@tonic-gate (void) close(prom_fd);
182*7c478bd9Sstevel@tonic-gate if (name == NULL)
183*7c478bd9Sstevel@tonic-gate return (NULL);
184*7c478bd9Sstevel@tonic-gate
185*7c478bd9Sstevel@tonic-gate /*
186*7c478bd9Sstevel@tonic-gate * if the name is not prefixed with a vendor name, add "SUNW," to make
187*7c478bd9Sstevel@tonic-gate * it more likely to be globally unique; see PSARC/2004/674.
188*7c478bd9Sstevel@tonic-gate */
189*7c478bd9Sstevel@tonic-gate
190*7c478bd9Sstevel@tonic-gate if (strchr(name, ',') == NULL) {
191*7c478bd9Sstevel@tonic-gate len = strlen(name) + sizeof ("SUNW,");
192*7c478bd9Sstevel@tonic-gate class_id = malloc(len);
193*7c478bd9Sstevel@tonic-gate if (class_id == NULL) {
194*7c478bd9Sstevel@tonic-gate free(name);
195*7c478bd9Sstevel@tonic-gate return (NULL);
196*7c478bd9Sstevel@tonic-gate }
197*7c478bd9Sstevel@tonic-gate (void) snprintf(class_id, len, "SUNW,%s", name);
198*7c478bd9Sstevel@tonic-gate free(name);
199*7c478bd9Sstevel@tonic-gate } else {
200*7c478bd9Sstevel@tonic-gate class_id = name;
201*7c478bd9Sstevel@tonic-gate }
202*7c478bd9Sstevel@tonic-gate
203*7c478bd9Sstevel@tonic-gate sanitize_class_id(class_id);
204*7c478bd9Sstevel@tonic-gate return (class_id);
205*7c478bd9Sstevel@tonic-gate }
206