networkd: Introduce Link Layer Discovery Protocol (LLDP)

This patch introduces LLDP support to networkd. it implements the
receiver side of the protocol.

The Link Layer Discovery Protocol (LLDP) is an industry-standard,
vendor-neutral method to allow networked devices to advertise
capabilities, identity, and other information onto a LAN. The Layer 2
protocol, detailed in IEEE 802.1AB-2005.LLDP allows network devices
that operate at the lower layers of a protocol stack (such as
Layer 2 bridges and switches) to learn some of the capabilities
and characteristics of LAN devices available to higher
layer protocols.

1 files changed, 61 insertions, 0 deletions

diff --git a/src/libsystemd-network/lldp-port.h b/src/libsystemd-network/lldp-port.h
new file mode 100644
index 0000000000..1b1ae040d1
--- /dev/null
+++ b/src/libsystemd-network/lldp-port.h
@@ -0,0 +1,61 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright (C) 2014 Tom Gundersen
+  Copyright (C) 2014 Susant Sahani
+
+  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/>.
+***/
+
+#pragma once
+
+#include <net/ethernet.h>
+
+#include "sd-event.h"
+#include "sd-lldp.h"
+
+typedef struct lldp_port lldp_port;
+
+struct lldp_port {
+        LLDPPortStatus status;
+
+        int ifindex;
+        char *ifname;
+
+        struct ether_addr mac;
+
+        int rawfd;
+
+        sd_event *event;
+        sd_event_source *lldp_port_rx;
+
+        int event_priority;
+
+        void *userdata;
+};
+
+int lldp_port_new(int ifindex,
+                  char *ifname,
+                  const struct ether_addr *addr,
+                  void *userdata,
+                  lldp_port **ret);
+void lldp_port_free(lldp_port *p);
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(lldp_port*, lldp_port_free);
+#define _cleanup_lldp_port_free_ _cleanup_(lldp_port_freep)
+
+int lldp_port_start(lldp_port *p);
+int lldp_port_stop(lldp_port *p);