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, 115 insertions, 0 deletions

diff --git a/src/libsystemd-network/lldp.h b/src/libsystemd-network/lldp.h
new file mode 100644
index 0000000000..5e4b283e26
--- /dev/null
+++ b/src/libsystemd-network/lldp.h
@@ -0,0 +1,115 @@
+/*-*- 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
+
+#define LLDP_MULTICAST_ADDR     { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x0e }
+
+#define ETHERTYPE_LLDP          0x88cc
+
+/* IEEE 802.3AB Clause 9: TLV Types */
+typedef enum LLDPTypes {
+        LLDP_TYPE_END                  =   0,
+        LLDP_TYPE_CHASSIS_ID           =   1,
+        LLDP_TYPE_PORT_ID              =   2,
+        LLDP_TYPE_TTL                  =   3,
+        LLDP_TYPE_PORT_DESCRIPTION     =   4,
+        LLDP_TYPE_SYSTEM_NAME          =   5,
+        LLDP_TYPE_SYSTEM_DESCRIPTION   =   6,
+        LLDP_TYPE_SYSTEM_CAPABILITIES  =   7,
+        LLDP_TYPE_MGMT_ADDRESS         =   8,
+        LLDP_TYPE_PRIVATE              =   127,
+        _LLDP_TYPE_MAX,
+        _LLDP_TYPE_INVALID             = -1,
+} LLDPTypes;
+
+/* IEEE 802.3AB Clause 9.5.2: Chassis subtypes */
+typedef enum LLDPChassisSubtypes {
+        LLDP_CHASSIS_SUBTYPE_RESERVED            = 0,
+        LLDP_CHASSIS_SUBTYPE_CHASSIS_COMPONENT   = 1,
+        LLDP_CHASSIS_SUBTYPE_INTERFACE_ALIAS     = 2,
+        LLDP_CHASSIS_SUBTYPE_PORT_COMPONENT      = 3,
+        LLDP_CHASSIS_SUBTYPE_MAC_ADDRESS         = 4,
+        LLDP_CHASSIS_SUBTYPE_NETWORK_ADDRESS     = 5,
+        LLDP_CHASSIS_SUBTYPE_INTERFACE_NAME      = 6,
+        LLDP_CHASSIS_SUBTYPE_LOCALLY_ASSIGNED    = 7,
+        _LLDP_CHASSIS_SUBTYPE_MAX,
+        _LLDP_CHASSIS_SUBTYPE_INVALID            = -1,
+} LLDPChassisSubtypes;
+
+/* IEEE 802.3AB Clause 9.5.3: Port subtype */
+typedef enum LLDPPortSubtypes  {
+        LLDP_PORT_SUBTYPE_RESERVED           = 0,
+        LLDP_PORT_SUBTYPE_INTERFACE_ALIAS    = 1,
+        LLDP_PORT_SUBTYPE_PORT_COMPONENT     = 2,
+        LLDP_PORT_SUBTYPE_MAC_ADDRESS        = 3,
+        LLDP_PORT_SUBTYPE_NETWORK            = 4,
+        LLDP_PORT_SUBTYPE_INTERFACE_NAME     = 5,
+        LLDP_PORT_SUBTYPE_AGENT_CIRCUIT_ID   = 6,
+        LLDP_PORT_SUBTYPE_LOCALLY_ASSIGNED   = 7,
+        _LLDP_PORT_SUBTYPE_MAX,
+        _LLDP_PORT_SUBTYPE_INVALID           = -1
+} LLDPPortSubtypes;
+
+typedef enum LLDPSystemCapabilities {
+        LLDP_SYSTEM_CAPABILITIES_OTHER        = 1 << 0,
+        LLDP_SYSTEM_CAPABILITIES_REPEATER     = 1 << 1,
+        LLDP_SYSTEM_CAPABILITIES_BRIDGE       = 1 << 2,
+        LLDP_SYSTEM_CAPABILITIES_WLAN_AP      = 1 << 3,
+        LLDP_SYSTEM_CAPABILITIES_ROUTER       = 1 << 4,
+        LLDP_SYSTEM_CAPABILITIES_PHONE        = 1 << 5,
+        LLDP_SYSTEM_CAPABILITIES_DOCSIS       = 1 << 6,
+        LLDP_SYSTEM_CAPABILITIES_STATION      = 1 << 7,
+        LLDP_SYSTEM_CAPABILITIES_CVLAN        = 1 << 8,
+        LLDP_SYSTEM_CAPABILITIES_SVLAN        = 1 << 9,
+        LLDP_SYSTEM_CAPABILITIES_TPMR         = 1 << 10,
+        _LLDP_SYSTEM_CAPABILITIES_MAX,
+        _LLDP_SYSTEM_CAPABILITIES_INVALID     = -1,
+} LLDPSystemCapabilities;
+
+typedef enum LLDPMedSubtype {
+        LLDP_MED_SUBTYPE_RESERVED          = 0,
+        LLDP_MED_SUBTYPE_CAPABILITIES      = 1,
+        LLDP_MED_SUBTYPE_NETWORK_POLICY    = 2,
+        LLDP_MED_SUBTYPE_LOCATION_ID       = 3,
+        LLDP_MED_SUBTYPE_EXTENDED_PVMDI    = 4,
+        LLDP_MED_SUBTYPE_INV_HWREV         = 5,
+        LLDP_MED_SUBTYPE_INV_FWREV         = 6,
+        LLDP_MED_SUBTYPE_INV_SWREV         = 7,
+        LLDP_MED_SUBTYPE_INV_SERIAL        = 8,
+        LLDP_MED_SUBTYPE_INV_MANUFACTURER  = 9,
+        LLDP_MED_SUBTYPE_INV_MODELNAME     = 10,
+        LLDP_MED_SUBTYPE_INV_ASSETID       = 11,
+        _LLDP_MED_SUBTYPE_MAX,
+        _LLDP_MED_SUBTYPE_INVALID          = -1,
+} LLDPMedSubtype;
+
+typedef enum LLDPMedCapability {
+        LLDP_MED_CAPABILITY_CAPAPILITIES   = 1 << 0,
+        LLDP_MED_CAPABILITY_NETWORK_POLICY = 1 << 1,
+        LLDP_MED_CAPABILITY_LOCATION_ID    = 1 << 2,
+        LLDP_MED_CAPABILITY_EXTENDED_PSE   = 1 << 3,
+        LLDP_MED_CAPABILITY_EXTENDED_PD    = 1 << 4,
+        LLDP_MED_CAPABILITY_INVENTORY      = 1 << 5,
+        LLDP_MED_CAPABILITY_MAX,
+        LLDP_MED_CAPABILITY_INVALID        = -1,
+} LLDPMedCapability;