/**
* Add a link to a bond (enslave)
* @arg sock netlink socket
* @arg master ifindex of bonding master
* @arg slave ifindex of slave link to add to bond
*
* This function is identical to rtnl_link_bond_enslave() except that
* it takes interface indices instead of rtnl_link objcets.
*
* @see rtnl_link_bond_enslave()
*
* @return 0 on success or a negative error code.
*/
int rtnl_link_bond_enslave_ifindex(struct nl_sock *sock, int master,
int slave)
{
struct rtnl_link *link;
int err;
if (!(link = rtnl_link_alloc()))
return -NLE_NOMEM;
if ((err = rtnl_link_set_type(link, "bond")) < 0)
goto errout;
rtnl_link_set_ifindex(link, slave);
rtnl_link_set_master(link, master);
if ((err = rtnl_link_change(sock, link, link, 0)) < 0)
goto errout;
rtnl_link_put(link);
/*
* Due to the kernel not signaling whether this opertion is
* supported or not, we will retrieve the attribute to see if the
* request was successful. If the master assigned remains unchanged
* we will return NLE_OPNOTSUPP to allow performing backwards
* compatibility of some sort.
*/
if ((err = rtnl_link_get_kernel(sock, slave, NULL, &link)) < 0)
return err;
if (rtnl_link_get_master(link) != master)
err = -NLE_OPNOTSUPP;
errout:
rtnl_link_put(link);
return err;
}
gboolean
nm_netlink_monitor_get_flags_sync (NMNetlinkMonitor *self,
guint32 ifindex,
guint32 *ifflags,
GError **error)
{
NMNetlinkMonitorPrivate *priv;
GetFlagsInfo info;
struct rtnl_link *filter;
int err;
g_return_val_if_fail (self != NULL, FALSE);
g_return_val_if_fail (NM_IS_NETLINK_MONITOR (self), FALSE);
g_return_val_if_fail (ifflags != NULL, FALSE);
priv = NM_NETLINK_MONITOR_GET_PRIVATE (self);
/* Update the link cache with the latest information */
err = nl_cache_refill (priv->nlh_sync, priv->link_cache);
if (err < 0) {
g_set_error (error,
NM_NETLINK_MONITOR_ERROR,
NM_NETLINK_MONITOR_ERROR_LINK_CACHE_UPDATE,
_("error updating link cache: %s"),
nl_geterror (err));
return FALSE;
}
/* HACK: Apparently to get it working we have to refill the cache twice;
* otherwise some kernels (or maybe libnl?) only send a few of the
* interfaces in the refill request.
*/
if (nl_cache_refill (priv->nlh_sync, priv->link_cache)) {
g_set_error (error,
NM_NETLINK_MONITOR_ERROR,
NM_NETLINK_MONITOR_ERROR_LINK_CACHE_UPDATE,
_("error updating link cache: %s"),
nl_geterror (err));
return FALSE;
}
/* Set up the filter */
filter = rtnl_link_alloc ();
if (!filter) {
g_set_error (error,
NM_NETLINK_MONITOR_ERROR,
NM_NETLINK_MONITOR_ERROR_BAD_ALLOC,
_("error processing netlink message: %s"),
nl_geterror (err));
return FALSE;
}
rtnl_link_set_ifindex (filter, ifindex);
memset (&info, 0, sizeof (info));
info.self = self;
info.filter = filter;
info.error = NULL;
nl_cache_foreach_filter (priv->link_cache, NULL, get_flags_sync_cb, &info);
rtnl_link_put (filter);
if (info.error) {
if (error)
*error = info.error;
else
g_error_free (info.error);
return FALSE;
} else
*ifflags = info.flags;
return TRUE; /* success */
}
/**
* Query NETLINK for ethernet configuration
*
* @param ethinf Pointer to an available struct etherinfo element. The 'device' member
* must contain a valid string to the device to query for information
* @param nlc Pointer to the libnl handle, which is used for the query against NETLINK
* @param query What to query for. Must be NLQRY_LINK or NLQRY_ADDR.
*
* @return Returns 1 on success, otherwise 0.
*/
int get_etherinfo(struct etherinfo_obj_data *data, nlQuery query)
{
struct nl_cache *link_cache;
struct nl_cache *addr_cache;
struct rtnl_addr *addr;
struct rtnl_link *link;
struct etherinfo *ethinf = NULL;
int ret = 0;
if( !data || !data->ethinfo ) {
return 0;
}
ethinf = data->ethinfo;
/* Open a NETLINK connection on-the-fly */
if( !open_netlink(data) ) {
PyErr_Format(PyExc_RuntimeError,
"Could not open a NETLINK connection for %s",
ethinf->device);
return 0;
}
/* Find the interface index we're looking up.
* As we don't expect it to change, we're reusing a "cached"
* interface index if we have that
*/
if( ethinf->index < 0 ) {
link_cache = rtnl_link_alloc_cache(*data->nlc);
ethinf->index = rtnl_link_name2i(link_cache, ethinf->device);
if( ethinf->index < 0 ) {
return 0;
}
nl_cache_free(link_cache);
}
/* Query the for requested info vai NETLINK */
switch( query ) {
case NLQRY_LINK:
/* Extract MAC/hardware address of the interface */
link_cache = rtnl_link_alloc_cache(*data->nlc);
link = rtnl_link_alloc();
rtnl_link_set_ifindex(link, ethinf->index);
nl_cache_foreach_filter(link_cache, (struct nl_object *)link, callback_nl_link, ethinf);
rtnl_link_put(link);
nl_cache_free(link_cache);
ret = 1;
break;
case NLQRY_ADDR:
/* Extract IP address information */
addr_cache = rtnl_addr_alloc_cache(*data->nlc);
addr = rtnl_addr_alloc();
rtnl_addr_set_ifindex(addr, ethinf->index);
/* Make sure we don't have any old IPv6 addresses saved */
if( ethinf->ipv6_addresses ) {
free_ipv6addresses(ethinf->ipv6_addresses);
ethinf->ipv6_addresses = NULL;
}
/* Retrieve all address information */
nl_cache_foreach_filter(addr_cache, (struct nl_object *)addr, callback_nl_address, ethinf);
rtnl_addr_put(addr);
nl_cache_free(addr_cache);
ret = 1;
break;
default:
ret = 0;
}
return ret;
}