networkd: ndisc - split out from dhcp6 code

1 files changed, 94 insertions, 0 deletions

diff --git a/src/network/networkd-ndisc.c b/src/network/networkd-ndisc.c
new file mode 100644
index 0000000000..1721cb36b6
--- /dev/null
+++ b/src/network/networkd-ndisc.c
@@ -0,0 +1,94 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright (C) 2014 Intel Corporation. All rights reserved.
+
+  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 <netinet/ether.h>
+#include <linux/if.h>
+
+#include "networkd-link.h"
+
+#include "sd-ndisc.h"
+
+static void ndisc_router_handler(sd_ndisc *nd, int event, void *userdata) {
+        Link *link = userdata;
+
+        assert(link);
+        assert(link->network);
+        assert(link->manager);
+
+        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+                return;
+
+        switch(event) {
+        case SD_NDISC_EVENT_ROUTER_ADVERTISMENT_NONE:
+                return;
+
+        case SD_NDISC_EVENT_ROUTER_ADVERTISMENT_OTHER:
+                dhcp6_configure(link, true);
+
+                break;
+        case SD_NDISC_EVENT_ROUTER_ADVERTISMENT_TIMEOUT:
+        case SD_NDISC_EVENT_ROUTER_ADVERTISMENT_MANAGED:
+                dhcp6_configure(link, false);
+
+                break;
+
+        case SD_NDISC_EVENT_ROUTER_ADVERTISMENT_PREFIX_EXPIRED:
+                if (!link->rtnl_extended_attrs)
+                        dhcp6_prefix_expired(link);
+
+                break;
+
+        default:
+                if (event < 0)
+                        log_link_warning_errno(link, event, "IPv6 Neighbor Discover error: %m");
+                else
+                        log_link_warning(link, "IPv6 Neighbor Discovery unknown event: %d", event);
+
+                break;
+        }
+}
+
+int ndisc_configure(Link *link) {
+        int r;
+
+        assert_return(link, -EINVAL);
+
+        r = sd_ndisc_new(&link->ndisc_router_discovery);
+        if (r < 0)
+                return r;
+
+        r = sd_ndisc_attach_event(link->ndisc_router_discovery, NULL, 0);
+        if (r < 0)
+                return r;
+
+        r = sd_ndisc_set_mac(link->ndisc_router_discovery, &link->mac);
+        if (r < 0)
+                return r;
+
+        r = sd_ndisc_set_index(link->ndisc_router_discovery, link->ifindex);
+        if (r < 0)
+                return r;
+
+        r = sd_ndisc_set_callback(link->ndisc_router_discovery,
+                                  ndisc_router_handler, link);
+
+        return r;
+}