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 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