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platform: be more resilient to unexpected libnl objects

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Signed-off-by: Thomas Haller <thaller@redhat.com>
This commit is contained in:
Thomas Haller 2014-02-17 12:48:05 +01:00
parent 11d8f21b68
commit 59394aef74
1 changed files with 60 additions and 25 deletions
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85
src/platform/nm-linux-platform.c
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@ -781,15 +781,15 @@ udev_get_driver (NMPlatform *platform, GUdevDevice *device, int ifindex)
return driver;
}
static void
static gboolean
init_link (NMPlatform *platform, NMPlatformLink *info, struct rtnl_link *rtnllink)
{
NMLinuxPlatformPrivate *priv = NM_LINUX_PLATFORM_GET_PRIVATE (platform);
GUdevDevice *udev_device;
memset (info, 0, sizeof (*info));
g_return_val_if_fail (rtnllink, FALSE);
g_assert (rtnllink);
memset (info, 0, sizeof (*info));
info->ifindex = rtnl_link_get_ifindex (rtnllink);
g_strlcpy (info->name, rtnl_link_get_name (rtnllink), sizeof (info->name));
@ -812,6 +812,8 @@ init_link (NMPlatform *platform, NMPlatformLink *info, struct rtnl_link *rtnllin
info->driver = "unknown";
info->udi = g_udev_device_get_sysfs_path (udev_device);
}
return TRUE;
}
/* Hack: Empty bridges and bonds have IFF_LOWER_UP flag and therefore they break
@ -858,13 +860,13 @@ hack_empty_master_iff_lower_up (NMPlatform *platform, struct nl_object *object)
rtnl_link_unset_flags (rtnllink, IFF_LOWER_UP);
}
static void
static gboolean
init_ip4_address (NMPlatformIP4Address *address, struct rtnl_addr *rtnladdr)
{
struct nl_addr *nladdr = rtnl_addr_get_local (rtnladdr);
struct nl_addr *nlpeer = rtnl_addr_get_peer (rtnladdr);
g_assert (nladdr);
g_return_val_if_fail (nladdr, FALSE);
memset (address, 0, sizeof (*address));
@ -873,15 +875,23 @@ init_ip4_address (NMPlatformIP4Address *address, struct rtnl_addr *rtnladdr)
address->timestamp = nm_utils_get_monotonic_timestamp_s ();
address->lifetime = rtnl_addr_get_valid_lifetime (rtnladdr);
address->preferred = rtnl_addr_get_preferred_lifetime (rtnladdr);
g_assert (nl_addr_get_len (nladdr) == sizeof (address->address));
if (!nladdr || nl_addr_get_len (nladdr) != sizeof (address->address)) {
g_return_val_if_reached (FALSE);
return FALSE;
}
memcpy (&address->address, nl_addr_get_binary_addr (nladdr), sizeof (address->address));
if (nlpeer) {
g_assert (nl_addr_get_len (nlpeer) == sizeof (address->peer_address));
if (nl_addr_get_len (nlpeer) != sizeof (address->peer_address)) {
g_return_val_if_reached (FALSE);
return FALSE;
}
memcpy (&address->peer_address, nl_addr_get_binary_addr (nlpeer), sizeof (address->peer_address));
}
return TRUE;
}
static void
static gboolean
init_ip6_address (NMPlatformIP6Address *address, struct rtnl_addr *rtnladdr)
{
struct nl_addr *nladdr = rtnl_addr_get_local (rtnladdr);
@ -895,12 +905,20 @@ init_ip6_address (NMPlatformIP6Address *address, struct rtnl_addr *rtnladdr)
address->lifetime = rtnl_addr_get_valid_lifetime (rtnladdr);
address->preferred = rtnl_addr_get_preferred_lifetime (rtnladdr);
address->flags = rtnl_addr_get_flags (rtnladdr);
g_assert (nl_addr_get_len (nladdr) == sizeof (address->address));
if (!nladdr || nl_addr_get_len (nladdr) != sizeof (address->address)) {
g_return_val_if_reached (FALSE);
return FALSE;
}
memcpy (&address->address, nl_addr_get_binary_addr (nladdr), sizeof (address->address));
if (nlpeer) {
g_assert (nl_addr_get_len (nlpeer) == sizeof (address->peer_address));
if (nl_addr_get_len (nlpeer) != sizeof (address->peer_address)) {
g_return_val_if_reached (FALSE);
return FALSE;
}
memcpy (&address->peer_address, nl_addr_get_binary_addr (nlpeer), sizeof (address->peer_address));
}
return TRUE;
}
static gboolean
@ -923,11 +941,17 @@ init_ip4_route (NMPlatformIP4Route *route, struct rtnl_route *rtnlroute)
route->plen = nl_addr_get_prefixlen (dst);
/* Workaround on previous workaround for libnl default route prefixlen bug. */
if (nl_addr_get_len (dst)) {
g_assert (nl_addr_get_len (dst) == sizeof (route->network));
if (nl_addr_get_len (dst) != sizeof (route->network)) {
g_return_val_if_reached (FALSE);
return FALSE;
}
memcpy (&route->network, nl_addr_get_binary_addr (dst), sizeof (route->network));
}
if (gw) {
g_assert (nl_addr_get_len (gw) == sizeof (route->network));
if (nl_addr_get_len (gw) != sizeof (route->network)) {
g_return_val_if_reached (FALSE);
return FALSE;
}
memcpy (&route->gateway, nl_addr_get_binary_addr (gw), sizeof (route->gateway));
}
route->metric = rtnl_route_get_priority (rtnlroute);
@ -956,11 +980,17 @@ init_ip6_route (NMPlatformIP6Route *route, struct rtnl_route *rtnlroute)
route->plen = nl_addr_get_prefixlen (dst);
/* Workaround on previous workaround for libnl default route prefixlen bug. */
if (nl_addr_get_len (dst)) {
g_assert (nl_addr_get_len (dst) == sizeof (route->network));
if (nl_addr_get_len (dst) != sizeof (route->network)) {
g_return_val_if_reached (FALSE);
return FALSE;
}
memcpy (&route->network, nl_addr_get_binary_addr (dst), sizeof (route->network));
}
if (gw) {
g_assert (nl_addr_get_len (gw) == sizeof (route->network));
if (nl_addr_get_len (gw) != sizeof (route->network)) {
g_return_val_if_reached (FALSE);
return FALSE;
}
memcpy (&route->gateway, nl_addr_get_binary_addr (gw), sizeof (route->gateway));
}
route->metric = rtnl_route_get_priority (rtnlroute);
@ -1059,7 +1089,8 @@ announce_object (NMPlatform *platform, const struct nl_object *object, ObjectSta
NMPlatformLink device;
struct rtnl_link *rtnl_link = (struct rtnl_link *) object;
init_link (platform, &device, rtnl_link);
if (!init_link (platform, &device, rtnl_link))
return;
/* Skip hardware devices not yet discovered by udev. They will be
* announced by udev_device_added(). This doesn't apply to removed
@ -1103,7 +1134,8 @@ announce_object (NMPlatform *platform, const struct nl_object *object, ObjectSta
{
NMPlatformIP4Address address;
init_ip4_address (&address, (struct rtnl_addr *) object);
if (!init_ip4_address (&address, (struct rtnl_addr *) object))
return;
/* Address deletion is sometimes accompanied by route deletion. We need to
* check all routes belonging to the same interface.
@ -1123,7 +1155,8 @@ announce_object (NMPlatform *platform, const struct nl_object *object, ObjectSta
{
NMPlatformIP6Address address;
init_ip6_address (&address, (struct rtnl_addr *) object);
if (!init_ip6_address (&address, (struct rtnl_addr *) object))
return;
g_signal_emit_by_name (platform, sig, address.ifindex, &address, reason);
}
return;
@ -1608,8 +1641,8 @@ link_get_all (NMPlatform *platform)
struct rtnl_link *rtnl_link = (struct rtnl_link *) object;
if (link_is_announceable (platform, rtnl_link)) {
init_link (platform, &device, rtnl_link);
g_array_append_val (links, device);
if (init_link (platform, &device, rtnl_link))
g_array_append_val (links, device);
}
}
@ -2570,9 +2603,10 @@ ip4_address_get_all (NMPlatform *platform, int ifindex)
for (object = nl_cache_get_first (priv->address_cache); object; object = nl_cache_get_next (object)) {
if (nl_object_is_marked (object)) {
init_ip4_address (&address, (struct rtnl_addr *) object);
address.source = NM_PLATFORM_SOURCE_KERNEL;
g_array_append_val (addresses, address);
if (init_ip4_address (&address, (struct rtnl_addr *) object)) {
address.source = NM_PLATFORM_SOURCE_KERNEL;
g_array_append_val (addresses, address);
}
nl_object_unmark (object);
}
}
@ -2594,9 +2628,10 @@ ip6_address_get_all (NMPlatform *platform, int ifindex)
for (object = nl_cache_get_first (priv->address_cache); object; object = nl_cache_get_next (object)) {
if (nl_object_is_marked (object)) {
init_ip6_address (&address, (struct rtnl_addr *) object);
address.source = NM_PLATFORM_SOURCE_KERNEL;
g_array_append_val (addresses, address);
if (init_ip6_address (&address, (struct rtnl_addr *) object)) {
address.source = NM_PLATFORM_SOURCE_KERNEL;
g_array_append_val (addresses, address);
}
nl_object_unmark (object);
}
}