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 #pragma ident "%Z%%M% %I% %E% SMI" 23*0Sstevel@tonic-gate 24*0Sstevel@tonic-gate /* 25*0Sstevel@tonic-gate * Copyright (c) 1990 by Sun Microsystems, Inc. 26*0Sstevel@tonic-gate * 27*0Sstevel@tonic-gate * All routines necessary to deal with the file /etc/ethers. The file 28*0Sstevel@tonic-gate * contains mappings from 48 bit ethernet addresses to their corresponding 29*0Sstevel@tonic-gate * hosts name. The addresses have an ascii representation of the form 30*0Sstevel@tonic-gate * "x:x:x:x:x:x" where x is a hex number between 0x00 and 0xff; the 31*0Sstevel@tonic-gate * bytes are always in network order. 32*0Sstevel@tonic-gate */ 33*0Sstevel@tonic-gate 34*0Sstevel@tonic-gate #include <stdio.h> 35*0Sstevel@tonic-gate #include <sys/types.h> 36*0Sstevel@tonic-gate #include <sys/socket.h> 37*0Sstevel@tonic-gate #include <net/if.h> 38*0Sstevel@tonic-gate #include <netinet/in.h> 39*0Sstevel@tonic-gate #include <net/if_arp.h> 40*0Sstevel@tonic-gate #include <netinet/if_ether.h> 41*0Sstevel@tonic-gate 42*0Sstevel@tonic-gate static char *domain; /* NIS domain name */ 43*0Sstevel@tonic-gate static int usingyellow; 44*0Sstevel@tonic-gate static char *ethers = "/etc/ethers"; 45*0Sstevel@tonic-gate 46*0Sstevel@tonic-gate /* 47*0Sstevel@tonic-gate * Parses a line from /etc/ethers into its components. The line has the form 48*0Sstevel@tonic-gate * 8:0:20:1:17:c8 krypton 49*0Sstevel@tonic-gate * where the first part is a 48 bit ethernet addrerss and the second is 50*0Sstevel@tonic-gate * the corresponding hosts name. 51*0Sstevel@tonic-gate * Returns zero if successful, non-zero otherwise. 52*0Sstevel@tonic-gate */ 53*0Sstevel@tonic-gate ether_line(s, e, hostname) 54*0Sstevel@tonic-gate char *s; /* the string to be parsed */ 55*0Sstevel@tonic-gate struct ether_addr *e; /* ethernet address struct to be filled in */ 56*0Sstevel@tonic-gate char *hostname; /* hosts name to be set */ 57*0Sstevel@tonic-gate { 58*0Sstevel@tonic-gate register int i; 59*0Sstevel@tonic-gate unsigned int t[6]; 60*0Sstevel@tonic-gate 61*0Sstevel@tonic-gate i = sscanf(s, " %x:%x:%x:%x:%x:%x %s", 62*0Sstevel@tonic-gate &t[0], &t[1], &t[2], &t[3], &t[4], &t[5], hostname); 63*0Sstevel@tonic-gate if (i != 7) { 64*0Sstevel@tonic-gate return (7 - i); 65*0Sstevel@tonic-gate } 66*0Sstevel@tonic-gate for (i = 0; i < 6; i++) 67*0Sstevel@tonic-gate e->ether_addr_octet[i] = t[i]; 68*0Sstevel@tonic-gate return (0); 69*0Sstevel@tonic-gate } 70*0Sstevel@tonic-gate 71*0Sstevel@tonic-gate /* 72*0Sstevel@tonic-gate * Converts a 48 bit ethernet number to its string representation. 73*0Sstevel@tonic-gate */ 74*0Sstevel@tonic-gate #define EI(i) (unsigned int)(e->ether_addr_octet[(i)]) 75*0Sstevel@tonic-gate char * 76*0Sstevel@tonic-gate ether_ntoa(e) 77*0Sstevel@tonic-gate struct ether_addr *e; 78*0Sstevel@tonic-gate { 79*0Sstevel@tonic-gate static char *s; 80*0Sstevel@tonic-gate 81*0Sstevel@tonic-gate if (s == 0) { 82*0Sstevel@tonic-gate s = (char *)malloc(18); 83*0Sstevel@tonic-gate if (s == 0) 84*0Sstevel@tonic-gate return (0); 85*0Sstevel@tonic-gate } 86*0Sstevel@tonic-gate s[0] = 0; 87*0Sstevel@tonic-gate sprintf(s, "%x:%x:%x:%x:%x:%x", 88*0Sstevel@tonic-gate EI(0), EI(1), EI(2), EI(3), EI(4), EI(5)); 89*0Sstevel@tonic-gate return (s); 90*0Sstevel@tonic-gate } 91*0Sstevel@tonic-gate 92*0Sstevel@tonic-gate /* 93*0Sstevel@tonic-gate * Converts a ethernet address representation back into its 48 bits. 94*0Sstevel@tonic-gate */ 95*0Sstevel@tonic-gate struct ether_addr * 96*0Sstevel@tonic-gate ether_aton(s) 97*0Sstevel@tonic-gate char *s; 98*0Sstevel@tonic-gate { 99*0Sstevel@tonic-gate static struct ether_addr *ep; 100*0Sstevel@tonic-gate register int i; 101*0Sstevel@tonic-gate unsigned int t[6]; 102*0Sstevel@tonic-gate 103*0Sstevel@tonic-gate if (ep == 0) { 104*0Sstevel@tonic-gate ep = (struct ether_addr *)calloc(1, sizeof (struct ether_addr)); 105*0Sstevel@tonic-gate if (ep == 0) 106*0Sstevel@tonic-gate return (0); 107*0Sstevel@tonic-gate } 108*0Sstevel@tonic-gate i = sscanf(s, " %x:%x:%x:%x:%x:%x", 109*0Sstevel@tonic-gate &t[0], &t[1], &t[2], &t[3], &t[4], &t[5]); 110*0Sstevel@tonic-gate if (i != 6) 111*0Sstevel@tonic-gate return ((struct ether_addr *)NULL); 112*0Sstevel@tonic-gate for (i = 0; i < 6; i++) 113*0Sstevel@tonic-gate ep->ether_addr_octet[i] = t[i]; 114*0Sstevel@tonic-gate return (ep); 115*0Sstevel@tonic-gate } 116