1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <netinet/ether.h> 30 31 #include <stdio.h> 32 ether_aton_r(const char * asc,ether_addr * addr)33 ether_addr* ether_aton_r(const char* asc, ether_addr* addr) { 34 int bytes[ETHER_ADDR_LEN], end; 35 int n = sscanf(asc, "%x:%x:%x:%x:%x:%x%n", 36 &bytes[0], &bytes[1], &bytes[2], 37 &bytes[3], &bytes[4], &bytes[5], &end); 38 if (n != ETHER_ADDR_LEN || asc[end] != '\0') return NULL; 39 for (int i = 0; i < ETHER_ADDR_LEN; i++) { 40 if (bytes[i] > 0xff) return NULL; 41 addr->ether_addr_octet[i] = bytes[i]; 42 } 43 return addr; 44 } 45 ether_aton(const char * asc)46 struct ether_addr* ether_aton(const char* asc) { 47 static ether_addr addr; 48 return ether_aton_r(asc, &addr); 49 } 50 ether_ntoa_r(const ether_addr * addr,char * buf)51 char* ether_ntoa_r(const ether_addr* addr, char* buf) { 52 snprintf(buf, 18, "%02x:%02x:%02x:%02x:%02x:%02x", 53 addr->ether_addr_octet[0], addr->ether_addr_octet[1], 54 addr->ether_addr_octet[2], addr->ether_addr_octet[3], 55 addr->ether_addr_octet[4], addr->ether_addr_octet[5]); 56 return buf; 57 } 58 ether_ntoa(const ether_addr * addr)59 char* ether_ntoa(const ether_addr* addr) { 60 static char buf[18]; 61 return ether_ntoa_r(addr, buf); 62 } 63