ad1ad5c8e3
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.
88 lines
2.6 KiB
C
88 lines
2.6 KiB
C
/*-*- 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 "util.h"
|
|
#include "lldp.h"
|
|
#include "list.h"
|
|
|
|
typedef struct tlv_packet tlv_packet;
|
|
typedef struct tlv_section tlv_section;
|
|
|
|
struct tlv_section {
|
|
uint16_t type;
|
|
uint16_t length;
|
|
|
|
uint8_t *read_pos;
|
|
uint8_t *data;
|
|
|
|
LIST_FIELDS(tlv_section, section);
|
|
};
|
|
|
|
int tlv_section_new(tlv_section **ret);
|
|
void tlv_section_free(tlv_section *ret);
|
|
|
|
struct tlv_packet {
|
|
uint16_t type;
|
|
uint16_t length;
|
|
usec_t ts;
|
|
|
|
uint8_t *container_pos;
|
|
uint8_t pdu[ETHER_MAX_LEN];
|
|
|
|
void *userdata;
|
|
|
|
struct ether_addr mac;
|
|
tlv_section *container;
|
|
|
|
LIST_HEAD(tlv_section, sections);
|
|
};
|
|
|
|
int tlv_packet_new(tlv_packet **ret);
|
|
void tlv_packet_free(tlv_packet *m);
|
|
|
|
DEFINE_TRIVIAL_CLEANUP_FUNC(tlv_packet*, tlv_packet_free);
|
|
#define _cleanup_tlv_packet_free_ _cleanup_(tlv_packet_freep)
|
|
|
|
int lldp_tlv_packet_open_container(tlv_packet *m, uint16_t type);
|
|
int lldp_tlv_packet_close_container(tlv_packet *m);
|
|
|
|
int tlv_packet_append_bytes(tlv_packet *m, const void *data, size_t data_length);
|
|
int tlv_packet_append_u8(tlv_packet *m, uint8_t data);
|
|
int tlv_packet_append_u16(tlv_packet *m, uint16_t data);
|
|
int tlv_packet_append_u32(tlv_packet *m, uint32_t data);
|
|
int tlv_packet_append_string(tlv_packet *m, char *data, uint16_t size);
|
|
|
|
int lldp_tlv_packet_enter_container(tlv_packet *m, uint16_t type);
|
|
int lldp_tlv_packet_exit_container(tlv_packet *m);
|
|
|
|
int tlv_packet_read_bytes(tlv_packet *m, uint8_t **data, uint16_t *data_length);
|
|
int tlv_packet_read_string(tlv_packet *m, char **data, uint16_t *data_length);
|
|
int tlv_packet_read_u8(tlv_packet *m, uint8_t *data);
|
|
int tlv_packet_read_u16(tlv_packet *m, uint16_t *data);
|
|
int tlv_packet_read_u32(tlv_packet *m, uint32_t *data);
|
|
|
|
int tlv_packet_parse_pdu(tlv_packet *t, uint16_t size);
|