libsystemd-rtnl: merge into libsystemd

1 files changed, 100 insertions, 0 deletions

diff --git a/src/libsystemd/rtnl-util.c b/src/libsystemd/rtnl-util.c
new file mode 100644
index 0000000000..dfc0050def
--- /dev/null
+++ b/src/libsystemd/rtnl-util.c
@@ -0,0 +1,100 @@
+/*-*- 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;
+}