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authorSusant Sahani <susant@redhat.com>2014-11-23 09:46:36 +0530
committerSusant Sahani <susant@redhat.com>2014-12-19 08:02:45 +0530
commitad1ad5c8e36ea795034fcdac660b15d7c141d55b (patch)
tree6cbd058659041f88cce2d1f9617eb0aba5d6e449 /src/libsystemd-network/lldp-internal.h
parent266b538958932e6fc27dfce4917336e70e17e29e (diff)
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.
Diffstat (limited to 'src/libsystemd-network/lldp-internal.h')
-rw-r--r--src/libsystemd-network/lldp-internal.h93
1 files changed, 93 insertions, 0 deletions
diff --git a/src/libsystemd-network/lldp-internal.h b/src/libsystemd-network/lldp-internal.h
new file mode 100644
index 0000000000..dbaf389792
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+++ b/src/libsystemd-network/lldp-internal.h
@@ -0,0 +1,93 @@
+/*-*- 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 "log.h"
+#include "list.h"
+#include "refcnt.h"
+#include "lldp-tlv.h"
+#include "prioq.h"
+
+typedef struct lldp_neighbour_port lldp_neighbour_port;
+typedef struct lldp_chassis lldp_chassis;
+typedef struct lldp_chassis_id lldp_chassis_id;
+
+struct lldp_neighbour_port {
+ uint8_t type;
+ uint8_t *data;
+
+ uint16_t length;
+ usec_t until;
+
+ unsigned prioq_idx;
+
+ lldp_chassis *c;
+ tlv_packet *packet;
+
+ LIST_FIELDS(lldp_neighbour_port, port);
+};
+
+int lldp_neighbour_port_new(lldp_chassis *c, tlv_packet *tlv, lldp_neighbour_port **ret);
+void lldp_neighbour_port_free(lldp_neighbour_port *p);
+void lldp_neighbour_port_remove_and_free(lldp_neighbour_port *p);
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(lldp_neighbour_port *, lldp_neighbour_port_free);
+#define _cleanup_lldp_neighbour_port_free_ _cleanup_(lldp_neighbour_port_freep)
+
+struct lldp_chassis_id {
+ uint8_t type;
+ uint16_t length;
+
+ uint8_t *data;
+};
+
+struct lldp_chassis {
+ RefCount n_ref;
+
+ lldp_chassis_id chassis_id;
+
+ Prioq *by_expiry;
+ Hashmap *neighbour_mib;
+
+ LIST_HEAD(lldp_neighbour_port, ports);
+};
+
+int lldp_chassis_new(tlv_packet *tlv,
+ Prioq *by_expiry,
+ Hashmap *neighbour_mib,
+ lldp_chassis **ret);
+
+void lldp_chassis_free(lldp_chassis *c);
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(lldp_chassis *, lldp_chassis_free);
+#define _cleanup_lldp_chassis_free_ _cleanup_(lldp_chassis_freep)
+
+int lldp_mib_update_objects(lldp_chassis *c, tlv_packet *tlv);
+int lldp_mib_add_objects(Prioq *by_expiry, Hashmap *neighbour_mib, tlv_packet *tlv);
+int lldp_mib_remove_objects(lldp_chassis *c, tlv_packet *tlv);
+
+int lldp_read_chassis_id(tlv_packet *tlv, uint8_t *type, uint16_t *length, uint8_t **data);
+int lldp_read_port_id(tlv_packet *tlv, uint8_t *type, uint16_t *length, uint8_t **data);
+int lldp_read_ttl(tlv_packet *tlv, uint16_t *ttl);
+
+#define log_lldp(fmt, ...) log_internal(LOG_DEBUG, 0, __FILE__, __LINE__, __func__, "LLDP: " fmt, ##__VA_ARGS__)