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e95b81c2fd
When we parse <mac address="00:00:00:00:00:00"/> we keep that in memory and pass it down to the hypervisor. However, that MAC address is not strictly valid as it is not marked as locally administered (bit 0x02) but it is not even globally unique. It is also used for loopback device on Linux, for example. And QEMU sees such MAC address just as "not specified" and generates a new one that libvirt does not even know about. So to make the overall experience better we now generate it if the supplied one is all clear. Resolves: https://issues.redhat.com/browse/RHEL-974 Signed-off-by: Martin Kletzander <mkletzan@redhat.com> Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
65 lines
2.5 KiB
C
65 lines
2.5 KiB
C
/*
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* virmacaddr.h: MAC address handling
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*
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* Copyright (C) 2006-2013 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include "internal.h"
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#define VIR_MAC_BUFLEN 6
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#define VIR_MAC_HEXLEN (VIR_MAC_BUFLEN * 2)
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#define VIR_MAC_PREFIX_BUFLEN 3
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#define VIR_MAC_STRING_BUFLEN (VIR_MAC_BUFLEN * 3)
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typedef struct _virMacAddr virMacAddr;
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struct _virMacAddr {
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unsigned char addr[VIR_MAC_BUFLEN];
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};
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/* This struct is used as a part of a larger struct that is
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* overlaid on an ethernet packet captured with libpcap, so it
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* must not have any extra members added - it must remain exactly
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* 6 bytes in length.
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*/
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G_STATIC_ASSERT(sizeof(struct _virMacAddr) == 6);
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int virMacAddrCompare(const char *mac1, const char *mac2);
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int virMacAddrCmp(const virMacAddr *mac1, const virMacAddr *mac2);
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int virMacAddrCmpRaw(const virMacAddr *mac1,
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const unsigned char s[VIR_MAC_BUFLEN]);
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void virMacAddrSet(virMacAddr *dst, const virMacAddr *src);
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void virMacAddrSetRaw(virMacAddr *dst, const unsigned char s[VIR_MAC_BUFLEN]);
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void virMacAddrGetRaw(const virMacAddr *src, unsigned char dst[VIR_MAC_BUFLEN]);
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const char *virMacAddrFormat(const virMacAddr *addr,
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char *str);
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void virMacAddrGenerate(const unsigned char prefix[VIR_MAC_PREFIX_BUFLEN],
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virMacAddr *addr) G_NO_INLINE;
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int virMacAddrParse(const char* str,
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virMacAddr *addr) G_GNUC_WARN_UNUSED_RESULT;
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int virMacAddrParseHex(const char* str,
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virMacAddr *addr)
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ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) G_GNUC_WARN_UNUSED_RESULT;
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bool virMacAddrIsUnicast(const virMacAddr *addr);
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bool virMacAddrIsMulticast(const virMacAddr *addr);
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bool virMacAddrIsBroadcastRaw(const unsigned char s[VIR_MAC_BUFLEN]);
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bool virMacAddrIsAllClear(const virMacAddr *addr);
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void virMacAddrFree(virMacAddr *addr);
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G_DEFINE_AUTOPTR_CLEANUP_FUNC(virMacAddr, virMacAddrFree);
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