/**
* nm_netlink_foreach_route:
* @ifindex: the interface index to filter routes for
* @family: the address family to filter routes for
* @scope: route scope, eg RT_SCOPE_LINK
* @ignore_inet6_ll_mc: if %TRUE ignore IPv6 link-local and multi-cast routes
* @callback: function called when a route matches the filter
* @user_data: data passed to @callback
*
* Filters each route in the routing table against the given @ifindex and
* @family (if given) and calls @callback for each matching route.
*
* Returns: a route if @callback returned one; the caller must dispose of the
* route using rtnl_route_put() when it is no longer required.
**/
struct rtnl_route *
nm_netlink_foreach_route (int ifindex,
int family,
int scope,
gboolean ignore_inet6_ll_mc,
NlRouteForeachFunc callback,
gpointer user_data)
{
struct nl_cache *cache;
ForeachRouteInfo info;
memset (&info, 0, sizeof (info));
info.ifindex = ifindex;
info.family = family;
info.scope = scope;
info.ignore_inet6_ll_mc = ignore_inet6_ll_mc;
info.callback = callback;
info.user_data = user_data;
info.iface = nm_netlink_index_to_iface (ifindex);
rtnl_route_alloc_cache (nm_netlink_get_default_handle (), family, 0, &cache);
g_warn_if_fail (cache != NULL);
if (cache) {
nl_cache_foreach (cache, foreach_route_cb, &info);
nl_cache_free (cache);
}
g_free (info.iface);
return info.out_route;
}
static void
nm_ip6_manager_init (NMIP6Manager *manager)
{
NMIP6ManagerPrivate *priv = NM_IP6_MANAGER_GET_PRIVATE (manager);
priv->devices = g_hash_table_new_full (g_direct_hash, g_direct_equal,
NULL,
(GDestroyNotify) nm_ip6_device_destroy);
priv->monitor = nm_netlink_monitor_get ();
nm_netlink_monitor_subscribe (priv->monitor, RTNLGRP_IPV6_IFADDR, NULL);
nm_netlink_monitor_subscribe (priv->monitor, RTNLGRP_IPV6_PREFIX, NULL);
nm_netlink_monitor_subscribe (priv->monitor, RTNLGRP_IPV6_ROUTE, NULL);
nm_netlink_monitor_subscribe (priv->monitor, RTNLGRP_ND_USEROPT, NULL);
nm_netlink_monitor_subscribe (priv->monitor, RTNLGRP_LINK, NULL);
priv->netlink_id = g_signal_connect (priv->monitor, "notification",
G_CALLBACK (netlink_notification), manager);
priv->nlh = nm_netlink_get_default_handle ();
rtnl_addr_alloc_cache (priv->nlh, &priv->addr_cache);
g_warn_if_fail (priv->addr_cache != NULL);
rtnl_route_alloc_cache (priv->nlh, NETLINK_ROUTE, NL_AUTO_PROVIDE, &priv->route_cache);
g_warn_if_fail (priv->route_cache != NULL);
}
/**
* nm_netlink_route_delete:
* @route: the route to delete
*
* Returns: %TRUE if the request was successful, %FALSE if it failed
**/
gboolean
nm_netlink_route_delete (struct rtnl_route *route)
{
struct nl_sock *nlh;
int err = 0;
g_return_val_if_fail (route != NULL, FALSE);
nlh = nm_netlink_get_default_handle ();
err = rtnl_route_delete (nlh, route, 0);
if (err)
nm_log_dbg (LOGD_IP4 | LOGD_IP6, "%s (%d)", nl_geterror(err), err);
/* Workaround libnl BUG: ESRCH is aliased to generic NLE_FAILURE
* See: http://git.kernel.org/?p=libs/netlink/libnl.git;a=commit;h=7e9d5f */
if (err == -NLE_FAILURE)
err = -NLE_OBJ_NOTFOUND;
return (err && (err != -NLE_OBJ_NOTFOUND) && (err != -NLE_RANGE) ) ? FALSE : TRUE;
}
/**
* nm_netlink_find_address:
* @ifindex: interface index
* @family: address family, either AF_INET or AF_INET6
* @addr: binary address, either struct in_addr* or struct in6_addr*
* @prefix: prefix length
*
* Searches for a matching address on the given interface.
*
* Returns: %TRUE if the given address was found on the interface, %FALSE if it
* was not found or an error occurred.
**/
gboolean
nm_netlink_find_address (int ifindex,
int family,
void *addr, /* struct in_addr or struct in6_addr */
int prefix)
{
struct nl_sock *nlh = NULL;
struct nl_cache *cache = NULL;
FindAddrInfo info;
g_return_val_if_fail (ifindex > 0, FALSE);
g_return_val_if_fail (family == AF_INET || family == AF_INET6, FALSE);
g_return_val_if_fail (addr != NULL, FALSE);
g_return_val_if_fail (prefix >= 0, FALSE);
memset (&info, 0, sizeof (info));
info.ifindex = ifindex;
info.family = family;
info.prefix = prefix;
info.addr = addr;
if (family == AF_INET)
info.addrlen = sizeof (struct in_addr);
else if (family == AF_INET6)
info.addrlen = sizeof (struct in6_addr);
else
g_assert_not_reached ();
nlh = nm_netlink_get_default_handle ();
if (nlh) {
rtnl_addr_alloc_cache(nlh, &cache);
if (cache) {
nl_cache_mngt_provide (cache);
nl_cache_foreach (cache, find_one_address, &info);
nl_cache_free (cache);
}
}
return info.found;
}
/**
* _route_add:
* @route: the route to add
* @family: address family, either %AF_INET or %AF_INET6
* @dest: the route destination address, either a struct in_addr or a struct
* in6_addr depending on @family
* @dest_prefix: the CIDR prefix of @dest
* @gateway: the gateway through which to reach @dest, if any; given as a
* struct in_addr or struct in6_addr depending on @family
* @flags: flags to pass to rtnl_route_add(), eg %NLM_F_REPLACE
*
* Returns: zero if succeeded or the netlink error otherwise.
**/
static int
_route_add (struct rtnl_route *route,
int family,
const void *dest, /* in_addr or in6_addr */
int dest_prefix,
const void *gateway, /* in_addr or in6_addr */
int flags)
{
struct nl_sock *sk;
struct nl_addr *dest_addr, *gw_addr;
void *tmp_addr;
int addrlen, err, log;
if (family == AF_INET) {
addrlen = sizeof (struct in_addr);
log = LOGD_IP4;
} else if (family == AF_INET6) {
addrlen = sizeof (struct in6_addr);
log = LOGD_IP6;
} else
g_assert_not_reached ();
sk = nm_netlink_get_default_handle ();
/* Build up the destination address */
if (dest) {
/* Copy to preserve const */
tmp_addr = g_malloc0 (addrlen);
memcpy (tmp_addr, dest, addrlen);
dest_addr = nl_addr_build (family, tmp_addr, addrlen);
g_free (tmp_addr);
g_return_val_if_fail (dest_addr != NULL, -NLE_INVAL);
nl_addr_set_prefixlen (dest_addr, dest_prefix);
rtnl_route_set_dst (route, dest_addr);
nl_addr_put (dest_addr);
}
/* Build up the gateway address */
if (gateway) {
tmp_addr = g_malloc0 (addrlen);
memcpy (tmp_addr, gateway, addrlen);
gw_addr = nl_addr_build (family, tmp_addr, addrlen);
g_free (tmp_addr);
if (gw_addr) {
nl_addr_set_prefixlen (gw_addr, 0);
rtnl_route_set_gateway (route, gw_addr);
rtnl_route_set_scope (route, RT_SCOPE_UNIVERSE);
nl_addr_put (gw_addr);
} else
nm_log_err (LOGD_DEVICE | log, "Invalid gateway");
}
err = rtnl_route_add (sk, route, flags);
/* LIBNL Bug: Aliased ESRCH */
if (err == -NLE_FAILURE)
err = -NLE_OBJ_NOTFOUND;
return err;
}
