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 /*
23 * Copyright 2003 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #include <sys/types.h>
28 #include <stddef.h>
29 #include <stdlib.h>
30 #include <strings.h>
31 #include <netinet/in.h>
32 #include <netinet/dhcp.h>
33 #include "dhcp_impl.h"
34
35 /*
36 * Fetch a copy of the DHCP-supplied value of the parameter requested
37 * by code in value, and the parameter value length in *vallenp.
38 *
39 * Return values:
40 *
41 * B_FALSE If invalid code, or no parameter value.
42 *
43 * B_TRUE Valid code which has a parameter value.
44 * *vallenp is set to the parameter value length.
45 * If the parameter value length is less than or
46 * equal to *vallenp, value is set to the parameter
47 * value.
48 */
49
50 boolean_t
dhcp_getinfo_pl(PKT_LIST * pl,uchar_t optcat,uint16_t code,uint16_t optsize,void * value,size_t * vallenp)51 dhcp_getinfo_pl(PKT_LIST *pl, uchar_t optcat, uint16_t code, uint16_t optsize,
52 void *value, size_t *vallenp)
53 {
54
55 if (pl == NULL)
56 return (B_FALSE);
57
58 if (optcat == DSYM_STANDARD) {
59 if (code > DHCP_LAST_OPT)
60 return (B_FALSE);
61
62 if (pl->opts[code] == NULL)
63 return (B_FALSE);
64
65 if (*vallenp < pl->opts[code]->len) {
66 *vallenp = pl->opts[code]->len;
67 return (B_TRUE);
68 }
69
70 bcopy(pl->opts[code]->value, value, pl->opts[code]->len);
71 *vallenp = pl->opts[code]->len;
72
73 } else if (optcat == DSYM_VENDOR) {
74 if (code > VS_OPTION_END)
75 return (B_FALSE);
76
77 if (pl->vs[code] == NULL)
78 return (B_FALSE);
79
80 if (*vallenp < pl->vs[code]->len) {
81 *vallenp = pl->vs[code]->len;
82 return (B_TRUE);
83 }
84
85 bcopy(pl->vs[code]->value, value, pl->vs[code]->len);
86 *vallenp = pl->vs[code]->len;
87
88 } else if (optcat == DSYM_FIELD) {
89 if (code + optsize > sizeof (PKT))
90 return (B_FALSE);
91
92 if (*vallenp < optsize) {
93 *vallenp = optsize;
94 return (B_TRUE);
95 }
96
97 *vallenp = optsize;
98 bcopy((caddr_t)pl->pkt + code, value, optsize);
99
100 } else
101 return (B_FALSE);
102
103 return (B_TRUE);
104 }
105