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9a6a339e4a
Fix a typing error in a conditional compiling directive
(reported by Vasil Dimov: Thanks !),
and improve their nesting ("MAIN" independent of platform).
mysys/my_gethwaddr.c:
Fix a typing error, reported by Vasil Dimov (thanks !):
The condition is meant to apply to FreeBSD or Linux.
Improve the nesting of conditional compiling directives,
handle "MAIN" and the platform issues independent of each other.
132 lines
2.9 KiB
C
132 lines
2.9 KiB
C
/* Copyright (C) 2004 MySQL AB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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/* get hardware address for an interface */
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/* if there are many available, any non-zero one can be used */
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#include "mysys_priv.h"
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#include <m_string.h>
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#ifndef MAIN
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#if defined(__FreeBSD__) || defined(__linux__)
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static my_bool memcpy_and_test(uchar *to, uchar *from, uint len)
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{
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uint i, res=1;
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for (i=0; i < len; i++)
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if ((*to++= *from++))
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res=0;
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return res;
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}
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#endif /* FreeBSD || linux */
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#ifdef __FreeBSD__
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#include <net/ethernet.h>
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#include <sys/sysctl.h>
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#include <net/route.h>
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#include <net/if.h>
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#include <net/if_dl.h>
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my_bool my_gethwaddr(uchar *to)
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{
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size_t len;
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uchar *buf, *next, *end, *addr;
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struct if_msghdr *ifm;
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struct sockaddr_dl *sdl;
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int i, res=1, mib[6]={CTL_NET, AF_ROUTE, 0, AF_LINK, NET_RT_IFLIST, 0};
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if (sysctl(mib, 6, NULL, &len, NULL, 0) == -1)
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goto err;
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if (!(buf = alloca(len)))
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goto err;
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if (sysctl(mib, 6, buf, &len, NULL, 0) < 0)
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goto err;
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end = buf + len;
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for (next = buf ; res && next < end ; next += ifm->ifm_msglen)
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{
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ifm = (struct if_msghdr *)next;
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if (ifm->ifm_type == RTM_IFINFO)
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{
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sdl = (struct sockaddr_dl *)(ifm + 1);
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addr=LLADDR(sdl);
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res=memcpy_and_test(to, addr, ETHER_ADDR_LEN);
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}
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}
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err:
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return res;
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}
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#elif __linux__
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#include <net/if.h>
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#include <sys/ioctl.h>
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#include <net/ethernet.h>
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my_bool my_gethwaddr(uchar *to)
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{
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int fd, res=1;
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struct ifreq ifr;
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fd = socket(AF_INET, SOCK_DGRAM, 0);
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if (fd < 0)
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goto err;
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bzero(&ifr, sizeof(ifr));
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strnmov(ifr.ifr_name, "eth0", sizeof(ifr.ifr_name) - 1);
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do {
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if (ioctl(fd, SIOCGIFHWADDR, &ifr) >= 0)
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res=memcpy_and_test(to, (uchar *)&ifr.ifr_hwaddr.sa_data, ETHER_ADDR_LEN);
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} while (res && (errno == 0 || errno == ENODEV) && ifr.ifr_name[3]++ < '6');
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close(fd);
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err:
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return res;
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}
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#else /* FreeBSD elif linux */
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/* just fail */
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my_bool my_gethwaddr(uchar *to __attribute__((unused)))
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{
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return 1;
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}
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#endif
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#else /* MAIN */
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int main(int argc __attribute__((unused)),char **argv)
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{
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uchar mac[6];
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uint i;
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MY_INIT(argv[0]);
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if (my_gethwaddr(mac))
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{
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printf("my_gethwaddr failed with errno %d\n", errno);
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exit(1);
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}
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for (i=0; i < sizeof(mac); i++)
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{
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if (i) printf(":");
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printf("%02x", mac[i]);
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}
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printf("\n");
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return 0;
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}
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#endif
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