Line data    Source code

       1             : /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
       2             : 
       3             : /***
       4             :   This file is part of systemd.
       5             : 
       6             :   Copyright (C) 2014 Tom Gundersen
       7             :   Copyright (C) 2014 Susant Sahani
       8             : 
       9             :   systemd is free software; you can redistribute it and/or modify it
      10             :   under the terms of the GNU Lesser General Public License as published by
      11             :   the Free Software Foundation; either version 2.1 of the License, or
      12             :   (at your option) any later version.
      13             : 
      14             :   systemd is distributed in the hope that it will be useful, but
      15             :   WITHOUT ANY WARRANTY; without even the implied warranty of
      16             :   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
      17             :   Lesser General Public License for more details.
      18             : 
      19             :   You should have received a copy of the GNU Lesser General Public License
      20             :   along with systemd; If not, see <http://www.gnu.org/licenses/>.
      21             : ***/
      22             : 
      23             : #pragma once
      24             : 
      25             : #include <net/ethernet.h>
      26             : 
      27             : #include "util.h"
      28             : #include "lldp.h"
      29             : #include "list.h"
      30             : 
      31             : typedef struct tlv_packet tlv_packet;
      32             : typedef struct tlv_section tlv_section;
      33             : 
      34             : struct tlv_section {
      35             :         uint16_t type;
      36             :         uint16_t length;
      37             : 
      38             :         uint8_t *read_pos;
      39             :         uint8_t *data;
      40             : 
      41             :         LIST_FIELDS(tlv_section, section);
      42             : };
      43             : 
      44             : int tlv_section_new(tlv_section **ret);
      45             : void tlv_section_free(tlv_section *ret);
      46             : 
      47             : struct tlv_packet {
      48             :         uint16_t type;
      49             :         uint16_t length;
      50             :         usec_t ts;
      51             : 
      52             :         uint8_t *container_pos;
      53             :         uint8_t pdu[ETHER_MAX_LEN];
      54             : 
      55             :         void *userdata;
      56             : 
      57             :         struct ether_addr mac;
      58             :         tlv_section *container;
      59             : 
      60             :         LIST_HEAD(tlv_section, sections);
      61             : };
      62             : 
      63             : int tlv_packet_new(tlv_packet **ret);
      64             : void tlv_packet_free(tlv_packet *m);
      65             : 
      66           2 : DEFINE_TRIVIAL_CLEANUP_FUNC(tlv_packet*, tlv_packet_free);
      67             : #define _cleanup_tlv_packet_free_ _cleanup_(tlv_packet_freep)
      68             : 
      69             : int lldp_tlv_packet_open_container(tlv_packet *m, uint16_t type);
      70             : int lldp_tlv_packet_close_container(tlv_packet *m);
      71             : 
      72             : int tlv_packet_append_bytes(tlv_packet *m, const void *data, size_t data_length);
      73             : int tlv_packet_append_u8(tlv_packet *m, uint8_t data);
      74             : int tlv_packet_append_u16(tlv_packet *m, uint16_t data);
      75             : int tlv_packet_append_u32(tlv_packet *m, uint32_t data);
      76             : int tlv_packet_append_string(tlv_packet *m, char *data, uint16_t size);
      77             : 
      78             : int lldp_tlv_packet_enter_container(tlv_packet *m, uint16_t type);
      79             : int lldp_tlv_packet_exit_container(tlv_packet *m);
      80             : 
      81             : int tlv_packet_read_bytes(tlv_packet *m, uint8_t **data, uint16_t *data_length);
      82             : int tlv_packet_read_string(tlv_packet *m, char **data, uint16_t *data_length);
      83             : int tlv_packet_read_u8(tlv_packet *m, uint8_t *data);
      84             : int tlv_packet_read_u16(tlv_packet *m, uint16_t *data);
      85             : int tlv_packet_read_u32(tlv_packet *m, uint32_t *data);
      86             : 
      87             : int tlv_packet_parse_pdu(tlv_packet *t, uint16_t size);