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infiniband: only check the last 8 bytes when doing hwaddr matches

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IPoIB "hardware addresses" are only partly based on the hardware, and
partly based on the InfiniBand configuration. So when checking if a
configuration matches a device, we should only match the fixed part.
This commit is contained in:
Dan Winship 2013-09-16 16:27:38 -04:00
parent 5a39715f2d
commit 17607e74a2
2 changed files with 40 additions and 2 deletions
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4
libnm-glib/nm-device-infiniband.c
View file

@ -169,7 +169,9 @@ connection_compatible (NMDevice *device, NMConnection *connection, GError **erro
return FALSE;
}
mac = nm_setting_infiniband_get_mac_address (s_infiniband);
if (mac && hwaddr && memcmp (mac->data, hwaddr, INFINIBAND_ALEN)) {
/* We only match against the last 8 bytes */
if (mac && hwaddr && memcmp (mac->data + INFINIBAND_ALEN - 8, hwaddr + INFINIBAND_ALEN - 8, 8)) {
g_set_error (error, NM_DEVICE_INFINIBAND_ERROR, NM_DEVICE_INFINIBAND_ERROR_MAC_MISMATCH,
"The MACs of the device and the connection didn't match.");
return FALSE;

38
src/devices/nm-device-infiniband.c
View file

@ -236,7 +236,10 @@ check_connection_compatible (NMDevice *device,
if (s_infiniband) {
mac = nm_setting_infiniband_get_mac_address (s_infiniband);
if (mac && memcmp (mac->data, nm_device_get_hw_address (device, NULL), INFINIBAND_ALEN)) {
/* We only compare the last 8 bytes */
if (mac && memcmp (mac->data + INFINIBAND_ALEN - 8,
nm_device_get_hw_address (device, NULL) + INFINIBAND_ALEN - 8,
8)) {
g_set_error (error,
NM_INFINIBAND_ERROR,
NM_INFINIBAND_ERROR_CONNECTION_INCOMPATIBLE,
@ -306,6 +309,38 @@ match_l2_config (NMDevice *self, NMConnection *connection)
return TRUE;
}
static gboolean
spec_match_list (NMDevice *device, const GSList *specs)
{
char *hwaddr_str, *spec_str;
const GSList *iter;
if (NM_DEVICE_CLASS (nm_device_infiniband_parent_class)->spec_match_list (device, specs))
return TRUE;
hwaddr_str = nm_utils_hwaddr_ntoa (nm_device_get_hw_address (device, NULL),
ARPHRD_INFINIBAND);
/* InfiniBand hardware address matches only need to match the last
* 8 bytes. In string format, that means we skip the first 36
* characters of hwaddr_str, and the first 40 of the spec (to skip
* "mac:" too).
*/
for (iter = specs; iter; iter = g_slist_next (iter)) {
spec_str = iter->data;
if ( !g_ascii_strncasecmp (spec_str, "mac:", 4)
&& strlen (spec_str) > 40
&& !g_ascii_strcasecmp (spec_str + 40, hwaddr_str + 36)) {
g_free (hwaddr_str);
return TRUE;
}
}
g_free (hwaddr_str);
return FALSE;
}
static void
get_property (GObject *object, guint prop_id,
GValue *value, GParamSpec *pspec)
@ -344,6 +379,7 @@ nm_device_infiniband_class_init (NMDeviceInfinibandClass *klass)
parent_class->get_generic_capabilities = get_generic_capabilities;
parent_class->check_connection_compatible = check_connection_compatible;
parent_class->complete_connection = complete_connection;
parent_class->spec_match_list = spec_match_list;
parent_class->act_stage1_prepare = act_stage1_prepare;
parent_class->ip4_config_pre_commit = ip4_config_pre_commit;