1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate /* 30*0Sstevel@tonic-gate * Function implementations to convert between link layer addresses and 31*0Sstevel@tonic-gate * ascii representations of the form "x:x:x:...:x:x:x" where x is a hex 32*0Sstevel@tonic-gate * number between 0x00 and 0xff; the bytes are always in network order. 33*0Sstevel@tonic-gate */ 34*0Sstevel@tonic-gate 35*0Sstevel@tonic-gate #include <stdio.h> 36*0Sstevel@tonic-gate #include <ctype.h> 37*0Sstevel@tonic-gate #include <stdlib.h> 38*0Sstevel@tonic-gate #include <sys/types.h> 39*0Sstevel@tonic-gate #include <net/if_dl.h> 40*0Sstevel@tonic-gate 41*0Sstevel@tonic-gate /* 42*0Sstevel@tonic-gate * Converts a "size" bytes long mac address to its string representation. 43*0Sstevel@tonic-gate * Currently, the "mactype" is unused, but in the future, the string 44*0Sstevel@tonic-gate * can be modulated by "mactype" (IFT_* value from <net/if_types.h>) 45*0Sstevel@tonic-gate */ 46*0Sstevel@tonic-gate /* ARGSUSED */ 47*0Sstevel@tonic-gate char * 48*0Sstevel@tonic-gate _link_ntoa(const unsigned char *macaddr, char *str, int size, int mactype) 49*0Sstevel@tonic-gate { 50*0Sstevel@tonic-gate char *buf; 51*0Sstevel@tonic-gate int i, n; 52*0Sstevel@tonic-gate 53*0Sstevel@tonic-gate if (((buf = str) == NULL) && 54*0Sstevel@tonic-gate ((buf = malloc(3 * size)) == NULL)) 55*0Sstevel@tonic-gate return (NULL); 56*0Sstevel@tonic-gate n = sprintf(buf, "%x", *macaddr++); 57*0Sstevel@tonic-gate for (i = 0; i < (size - 1); i++) 58*0Sstevel@tonic-gate n += sprintf(buf+n, ":%x", *macaddr++); 59*0Sstevel@tonic-gate return (buf); 60*0Sstevel@tonic-gate } 61*0Sstevel@tonic-gate 62*0Sstevel@tonic-gate /* 63*0Sstevel@tonic-gate * Converts a string possibly representing a link address into its 64*0Sstevel@tonic-gate * bit format, returning length of the address in bytes. 65*0Sstevel@tonic-gate */ 66*0Sstevel@tonic-gate uchar_t * 67*0Sstevel@tonic-gate _link_aton(const char *ascaddr, int *maclen) 68*0Sstevel@tonic-gate { 69*0Sstevel@tonic-gate unsigned char cval, num = 0; 70*0Sstevel@tonic-gate int idx = 0, numcolons = 0, digits = 0; 71*0Sstevel@tonic-gate uchar_t *netaddr; 72*0Sstevel@tonic-gate const char *cptr; 73*0Sstevel@tonic-gate char lastc = ':'; 74*0Sstevel@tonic-gate 75*0Sstevel@tonic-gate while (isspace(*ascaddr)) 76*0Sstevel@tonic-gate ascaddr++; 77*0Sstevel@tonic-gate 78*0Sstevel@tonic-gate /* 79*0Sstevel@tonic-gate * Find how many :'s in the string. Also sanity check 80*0Sstevel@tonic-gate * the string for valid hex chars, absence of white 81*0Sstevel@tonic-gate * spaces, not starting or ending with :, absence of 82*0Sstevel@tonic-gate * consecutive :'s, excessive digits per element 83*0Sstevel@tonic-gate * and non-null string. 84*0Sstevel@tonic-gate */ 85*0Sstevel@tonic-gate cptr = ascaddr; 86*0Sstevel@tonic-gate while ((cval = *cptr++) != '\0') { 87*0Sstevel@tonic-gate if (cval == ':') { 88*0Sstevel@tonic-gate if (lastc == ':') 89*0Sstevel@tonic-gate break; 90*0Sstevel@tonic-gate numcolons++; 91*0Sstevel@tonic-gate digits = 0; 92*0Sstevel@tonic-gate } else if (!isxdigit(cval)) { 93*0Sstevel@tonic-gate break; 94*0Sstevel@tonic-gate } else { 95*0Sstevel@tonic-gate digits++; 96*0Sstevel@tonic-gate } 97*0Sstevel@tonic-gate 98*0Sstevel@tonic-gate if (digits > 2) 99*0Sstevel@tonic-gate break; 100*0Sstevel@tonic-gate 101*0Sstevel@tonic-gate lastc = cval; 102*0Sstevel@tonic-gate } 103*0Sstevel@tonic-gate if ((lastc == ':') || (cval != '\0' && !isspace(cval)) || 104*0Sstevel@tonic-gate (digits > 2)) { 105*0Sstevel@tonic-gate *maclen = -1; 106*0Sstevel@tonic-gate return (NULL); 107*0Sstevel@tonic-gate } 108*0Sstevel@tonic-gate 109*0Sstevel@tonic-gate if ((netaddr = malloc(numcolons)) == NULL) { 110*0Sstevel@tonic-gate *maclen = 0; 111*0Sstevel@tonic-gate return (NULL); 112*0Sstevel@tonic-gate } 113*0Sstevel@tonic-gate 114*0Sstevel@tonic-gate for (;;) { 115*0Sstevel@tonic-gate cval = *ascaddr++; 116*0Sstevel@tonic-gate if (isdigit(cval)) { 117*0Sstevel@tonic-gate num = (num << 4) | (cval - '0'); 118*0Sstevel@tonic-gate } else if (isxdigit(cval)) { 119*0Sstevel@tonic-gate num = (num << 4) | 120*0Sstevel@tonic-gate (cval - (isupper(cval) ? 'A' : 'a') + 10); 121*0Sstevel@tonic-gate } else if (cval == ':') { 122*0Sstevel@tonic-gate netaddr[idx++] = num; 123*0Sstevel@tonic-gate num = 0; 124*0Sstevel@tonic-gate } else { 125*0Sstevel@tonic-gate /* 126*0Sstevel@tonic-gate * We must have hit a whitespace. Stop 127*0Sstevel@tonic-gate * parsing now. 128*0Sstevel@tonic-gate */ 129*0Sstevel@tonic-gate netaddr[idx++] = num; 130*0Sstevel@tonic-gate break; 131*0Sstevel@tonic-gate } 132*0Sstevel@tonic-gate } 133*0Sstevel@tonic-gate *maclen = idx; 134*0Sstevel@tonic-gate return (netaddr); 135*0Sstevel@tonic-gate } 136