1 /* $OpenBSD: print.c,v 1.11 2016/02/06 23:50:10 krw Exp $ */ 2 3 /* Turn data structures into printable text. */ 4 5 /* 6 * Copyright (c) 1995, 1996, 1997, 1998 The Internet Software Consortium. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of The Internet Software Consortium nor the names 19 * of its contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND 23 * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 24 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 26 * DISCLAIMED. IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR 27 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 29 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 30 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 31 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 32 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 33 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * This software has been written for the Internet Software Consortium 37 * by Ted Lemon <mellon@fugue.com> in cooperation with Vixie 38 * Enterprises. To learn more about the Internet Software Consortium, 39 * see ``http://www.vix.com/isc''. To learn more about Vixie 40 * Enterprises, see ``http://www.vix.com''. 41 */ 42 43 #include <sys/types.h> 44 #include <sys/socket.h> 45 46 #include <net/if.h> 47 48 #include <netinet/in.h> 49 50 #include <stdio.h> 51 #include <string.h> 52 53 #include "dhcp.h" 54 #include "tree.h" 55 #include "dhcpd.h" 56 57 char * 58 print_hw_addr(int htype, int hlen, unsigned char *data) 59 { 60 static char habuf[49]; 61 int i, j, slen = sizeof(habuf); 62 char *s = habuf; 63 64 if (htype == 0 || hlen == 0) { 65 bad: 66 strlcpy(habuf, "<null>", sizeof habuf); 67 return habuf; 68 } 69 70 for (i = 0; i < hlen; i++) { 71 j = snprintf(s, slen, "%02x", data[i]); 72 if (j <= 0 || j >= slen) 73 goto bad; 74 j = strlen(s); 75 s += j; 76 slen -= (j + 1); 77 *s++ = ':'; 78 } 79 *--s = '\0'; 80 return habuf; 81 } 82