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Diffstat (limited to 'src/nm-netlink-utils.c')
| -rw-r--r-- | src/nm-netlink-utils.c | 465 |
1 files changed, 0 insertions, 465 deletions
diff --git a/src/nm-netlink-utils.c b/src/nm-netlink-utils.c deleted file mode 100644 index 0ec538975..000000000 --- a/src/nm-netlink-utils.c +++ /dev/null @@ -1,465 +0,0 @@ -/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */ -/* NetworkManager -- Network link manager - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - * - * Copyright (C) 2011 Red Hat, Inc. - */ - -#include "logging/nm-logging.h" -#include "nm-netlink-utils.h" -#include "nm-netlink-monitor.h" -#include "nm-netlink-compat.h" - -#include <arpa/inet.h> -#include <netinet/in.h> -#include <netlink/route/addr.h> - -typedef struct { - int ifindex; - int family; - void *addr; - int addrlen; - int prefix; - gboolean found; -} FindAddrInfo; - -static void -find_one_address (struct nl_object *object, void *user_data) -{ - FindAddrInfo *info = user_data; - struct rtnl_addr *addr = (struct rtnl_addr *) object; - struct nl_addr *local; - void *binaddr; - - if (info->found) - return; - - if (rtnl_addr_get_ifindex (addr) != info->ifindex) - return; - if (rtnl_addr_get_family (addr) != info->family) - return; - - if (rtnl_addr_get_prefixlen (addr) != info->prefix) - return; - - local = rtnl_addr_get_local (addr); - if (nl_addr_get_family (local) != info->family) - return; - if (nl_addr_get_len (local) != info->addrlen) - return; - binaddr = nl_addr_get_binary_addr (local); - if (binaddr) { - if (memcmp (binaddr, info->addr, info->addrlen) == 0) - info->found = TRUE; /* Yay, found it */ - } -} - -/** - * 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; -} - -struct rtnl_route * -nm_netlink_route_new (int ifindex, - int family, - int mss, - ...) -{ - va_list var_args; - struct rtnl_route *route; - NmNlProp prop = NMNL_PROP_INVALID; - int value; - - route = rtnl_route_alloc (); - g_return_val_if_fail (route != NULL, NULL); - - if (ifindex > 0) - rtnl_route_set_oif (route, ifindex); - if (family != AF_UNSPEC) - rtnl_route_set_family (route, family); - if (mss > 0) - rtnl_route_set_metric (route, RTAX_ADVMSS, mss); - - va_start (var_args, mss); - prop = va_arg (var_args, NmNlProp); - while (prop != NMNL_PROP_INVALID) { - value = va_arg (var_args, int); - - if (prop == NMNL_PROP_PROT && value != RTPROT_UNSPEC) - rtnl_route_set_protocol (route, value); - else if (prop == NMNL_PROP_TABLE && value != RT_TABLE_UNSPEC) - rtnl_route_set_table (route, value); - else if (prop == NMNL_PROP_SCOPE && value != RT_SCOPE_NOWHERE) - rtnl_route_set_scope (route, value); - else if (prop == NMNL_PROP_PRIO && value > 0) - rtnl_route_set_priority (route, value); - - prop = va_arg (var_args, NmNlProp); - } - va_end (var_args); - - return route; -} - -/** - * _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; -} - -/** - * nm_netlink_route4_add: - * @route: the route to add - * @dest: the route destination address in network byte order - * @dest_prefix: the CIDR prefix of @dest - * @gateway: the gateway through which to reach @dest, if any, in network byte order - * @flags: flags to pass to rtnl_route_add(), eg %NLM_F_REPLACE - * - * Adds an IPv4 route with the given parameters. - * - * Returns: zero if succeeded or the netlink error otherwise. - **/ -int -nm_netlink_route4_add (struct rtnl_route *route, - guint32 *dst, - int prefix, - guint32 *gw, - int flags) -{ - return _route_add (route, AF_INET, dst, prefix, gw, flags); -} - -/** - * nm_netlink_route6_add: - * @route: the route to add - * @dest: the route destination address - * @dest_prefix: the CIDR prefix of @dest - * @gateway: the gateway through which to reach @dest, if any - * @flags: flags to pass to rtnl_route_add(), eg %NLM_F_REPLACE - * - * Adds an IPv6 route with the given parameters. - * - * Returns: zero if succeeded or the netlink error otherwise. - **/ -int -nm_netlink_route6_add (struct rtnl_route *route, - const struct in6_addr *dst, - int prefix, - const struct in6_addr *gw, - int flags) -{ - return _route_add (route, AF_INET6, dst, prefix, gw, flags); -} - -/** - * 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; -} - - -static void -dump_route (struct rtnl_route *route) -{ - char buf6[INET6_ADDRSTRLEN]; - char buf4[INET_ADDRSTRLEN]; - struct nl_addr *nl; - struct in6_addr *addr6 = NULL; - struct in_addr *addr4 = NULL; - int prefixlen = 0; - const char *sf = "UNSPEC"; - int family = rtnl_route_get_family (route); - guint32 log_level = LOGD_IP4 | LOGD_IP6; - - memset (buf6, 0, sizeof (buf6)); - memset (buf4, 0, sizeof (buf4)); - nl = rtnl_route_get_dst (route); - if (nl) { - if (nl_addr_get_family (nl) == AF_INET) { - addr4 = nl_addr_get_binary_addr (nl); - if (addr4) - inet_ntop (AF_INET, addr4, &buf4[0], sizeof (buf4)); - } else if (nl_addr_get_family (nl) == AF_INET6) { - addr6 = nl_addr_get_binary_addr (nl); - if (addr6) - inet_ntop (AF_INET6, addr6, &buf6[0], sizeof (buf6)); - } - prefixlen = nl_addr_get_prefixlen (nl); - } - - if (family == AF_INET) { - sf = "INET"; - log_level = LOGD_IP4; - } else if (family == AF_INET6) { - sf = "INET6"; - log_level = LOGD_IP6; - } - - nm_log_dbg (log_level, " route idx %d family %s (%d) addr %s/%d", - rtnl_route_get_oif (route), - sf, family, - strlen (buf4) ? buf4 : (strlen (buf6) ? buf6 : "<unknown>"), - prefixlen); -} - - -typedef struct { - int ifindex; - int family; - int scope; - gboolean ignore_inet6_ll_mc; - char *iface; - NlRouteForeachFunc callback; - gpointer user_data; - struct rtnl_route *out_route; -} ForeachRouteInfo; - -static void -foreach_route_cb (struct nl_object *object, void *user_data) -{ - ForeachRouteInfo *info = user_data; - struct rtnl_route *route = (struct rtnl_route *) object; - struct nl_addr *dst; - - if (info->out_route) - return; - - if (nm_logging_level_enabled (LOGL_DEBUG)) - dump_route (route); - - if ( info->ifindex > 0 - && rtnl_route_get_oif (route) != info->ifindex) - return; - - if ( info->scope != RT_SCOPE_UNIVERSE - && rtnl_route_get_scope (route) != info->scope) - return; - - if ( info->family != AF_UNSPEC - && rtnl_route_get_family (route) != info->family) - return; - - dst = rtnl_route_get_dst (route); - - /* Check for IPv6 LL and MC routes that might need to be ignored */ - if ( (info->family == AF_INET6 || info->family == AF_UNSPEC) - && (rtnl_route_get_family (route) == AF_INET6)) { - struct in6_addr *addr = NULL; - - if (dst) - addr = nl_addr_get_binary_addr (dst); - if (addr) { - if ( IN6_IS_ADDR_LINKLOCAL (addr) - || IN6_IS_ADDR_MC_LINKLOCAL (addr) - || (IN6_IS_ADDR_MULTICAST (addr) && (nl_addr_get_prefixlen (dst) == 8))) - return; - } - } - - info->out_route = info->callback (route, dst, info->iface, info->user_data); - if (info->out_route) { - /* Ref the route so it sticks around after the cache is cleared */ - rtnl_route_get (info->out_route); - } -} - -/** - * 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; -} - - |