LXR qemu/net/util.c

   1/*
   2 * QEMU System Emulator
   3 *
   4 * Copyright (c) 2003-2008 Fabrice Bellard
   5 *
   6 * Permission is hereby granted, free of charge, to any person obtaining a copy
   7 * of this software and associated documentation files (the "Software"), to deal
   8 * in the Software without restriction, including without limitation the rights
   9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10 * copies of the Software, and to permit persons to whom the Software is
  11 * furnished to do so, subject to the following conditions:
  12 *
  13 * The above copyright notice and this permission notice shall be included in
  14 * all copies or substantial portions of the Software.
  15 *
  16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22 * THE SOFTWARE.
  23 */
  24
  25#include "net/util.h"
  26#include <errno.h>
  27#include <stdlib.h>
  28
  29int net_parse_macaddr(uint8_t *macaddr, const char *p)
  30{
  31    int i;
  32    char *last_char;
  33    long int offset;
  34
  35    errno = 0;
  36    offset = strtol(p, &last_char, 0);
  37    if (errno == 0 && *last_char == '\0' &&
  38        offset >= 0 && offset <= 0xFFFFFF) {
  39        macaddr[3] = (offset & 0xFF0000) >> 16;
  40        macaddr[4] = (offset & 0xFF00) >> 8;
  41        macaddr[5] = offset & 0xFF;
  42        return 0;
  43    }
  44
  45    for (i = 0; i < 6; i++) {
  46        macaddr[i] = strtol(p, (char **)&p, 16);
  47        if (i == 5) {
  48            if (*p != '\0') {
  49                return -1;
  50            }
  51        } else {
  52            if (*p != ':' && *p != '-') {
  53                return -1;
  54            }
  55            p++;
  56        }
  57    }
  58
  59    return 0;
  60}
  61