| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <sys/types.h> |
| #include <net/if_ether.h> |
| #include <ctype.h> |
| |
| static inline int |
| xdigit (char c) { |
| unsigned d; |
| d = (unsigned)(c-'0'); |
| if (d < 10) return (int)d; |
| d = (unsigned)(c-'a'); |
| if (d < 6) return (int)(10+d); |
| d = (unsigned)(c-'A'); |
| if (d < 6) return (int)(10+d); |
| return -1; |
| } |
| |
| /* |
| * Convert Ethernet address in the standard hex-digits-and-colons to binary |
| * representation. |
| * Re-entrant version (GNU extensions) |
| */ |
| struct ether_addr * |
| ether_aton_r (const char *asc, struct ether_addr * addr) |
| { |
| int i, val0, val1; |
| for (i = 0; i < ETHER_ADDR_LEN; ++i) { |
| val0 = xdigit(*asc); |
| asc++; |
| if (val0 < 0) |
| return NULL; |
| |
| val1 = xdigit(*asc); |
| asc++; |
| if (val1 < 0) |
| return NULL; |
| |
| addr->ether_addr_octet[i] = (u_int8_t)((val0 << 4) + val1); |
| |
| if (i < ETHER_ADDR_LEN - 1) { |
| if (*asc != ':') |
| return NULL; |
| asc++; |
| } |
| } |
| if (*asc != '\0') |
| return NULL; |
| return addr; |
| } |
| |
| /* |
| * Convert Ethernet address in the standard hex-digits-and-colons to binary |
| * representation. |
| */ |
| struct ether_addr * |
| ether_aton (const char *asc) |
| { |
| static struct ether_addr addr; |
| return ether_aton_r(asc, &addr); |
| } |