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Diffstat (limited to 'src/libsystemd/rtnl-util.c')
-rw-r--r--src/libsystemd/rtnl-util.c100
1 files changed, 100 insertions, 0 deletions
diff --git a/src/libsystemd/rtnl-util.c b/src/libsystemd/rtnl-util.c
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+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright (C) 2013 Tom Gundersen <teg@jklm.no>
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <linux/rtnetlink.h>
+#include <netinet/ether.h>
+
+#include "sd-rtnl.h"
+
+#include "rtnl-util.h"
+
+int rtnl_set_link_name(sd_rtnl *rtnl, int ifindex, const char *name) {
+ _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *message = NULL;
+ int r;
+
+ assert(rtnl);
+ assert(ifindex > 0);
+ assert(name);
+
+ r = sd_rtnl_message_link_new(RTM_SETLINK, ifindex, &message);
+ if (r < 0)
+ return r;
+
+ r = sd_rtnl_message_append_string(message, IFLA_IFNAME, name);
+ if (r < 0)
+ return r;
+
+ r = sd_rtnl_call(rtnl, message, 0, NULL);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+int rtnl_set_link_properties(sd_rtnl *rtnl, int ifindex, const char *alias,
+ const struct ether_addr *mac, unsigned mtu) {
+ _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *message = NULL;
+ bool need_update = false;
+ int r;
+
+ assert(rtnl);
+ assert(ifindex > 0);
+
+ if (!alias && !mac && mtu == 0)
+ return 0;
+
+ r = sd_rtnl_message_link_new(RTM_SETLINK, ifindex, &message);
+ if (r < 0)
+ return r;
+
+ if (alias) {
+ r = sd_rtnl_message_append_string(message, IFLA_IFALIAS, alias);
+ if (r < 0)
+ return r;
+
+ need_update = true;
+
+ }
+
+ if (mac) {
+ r = sd_rtnl_message_append_ether_addr(message, IFLA_ADDRESS, mac);
+ if (r < 0)
+ return r;
+
+ need_update = true;
+ }
+
+ if (mtu > 0) {
+ r = sd_rtnl_message_append_u32(message, IFLA_MTU, mtu);
+ if (r < 0)
+ return r;
+
+ need_update = true;
+ }
+
+ if (need_update) {
+ r = sd_rtnl_call(rtnl, message, 0, NULL);
+ if (r < 0)
+ return r;
+ }
+
+ return 0;
+}