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platform: ignore permanent MAC addresses of all ones (FF:FF:FF:FF:FF:FF)

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Drivers are stupid, and just like the platform ignores an all zeros
permanent address, so should it ignore all ones.

NetworkManager[509]: <debug> [1453743778.854919] [devices/nm-device.c:8885] nm_device_update_hw_address(): [0x190370] (eth0): hardware address now 86:18:52:xx:xx:xx
NetworkManager[509]: <debug> [1453743778.855438] [devices/nm-device.c:9138] constructed(): [0x190370] (eth0): read initial MAC address 86:18:52:xx:xx:xx
NetworkManager[509]: <debug> [1453743778.861602] [devices/nm-device.c:9148] constructed(): [0x190370] (eth0): read permanent MAC address FF:FF:FF:FF:FF:FF
This commit is contained in:
Dan Williams
2016-01-26 11:33:49 -06:00
parent 2d1638bba9
commit d442dcd174
1 changed files with 8 additions and 1 deletions
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9
src/platform/nm-platform-utils.c
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@@ -142,7 +142,8 @@ nmp_utils_ethtool_get_permanent_address (const char *ifname,
struct ethtool_perm_addr e;
guint8 _extra_data[NM_UTILS_HWADDR_LEN_MAX + 1];
} edata;
guint zeros[NM_UTILS_HWADDR_LEN_MAX] = { 0 };
static const guint8 zeros[NM_UTILS_HWADDR_LEN_MAX] = { 0 };
static guint8 ones[NM_UTILS_HWADDR_LEN_MAX] = { 0 };
if (!ifname)
return FALSE;
@@ -161,6 +162,12 @@ nmp_utils_ethtool_get_permanent_address (const char *ifname,
if (memcmp (edata.e.data, zeros, edata.e.size) == 0)
return FALSE;
/* Some drivers return a permanent address of all ones. Reject that too */
if (G_UNLIKELY (ones[0] != 0xFF))
memset (ones, 0xFF, sizeof (ones));
if (memcmp (edata.e.data, ones, edata.e.size) == 0)
return FALSE;
memcpy (buf, edata.e.data, edata.e.size);
*length = edata.e.size;
return TRUE;