Line data    Source code

       1             : /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
       2             : 
       3             : #pragma once
       4             : 
       5             : /***
       6             :   This file is part of systemd.
       7             : 
       8             :   Copyright (C) 2013 Intel Corporation. All rights reserved.
       9             :   Copyright (C) 2014 Tom Gundersen
      10             : 
      11             :   systemd is free software; you can redistribute it and/or modify it
      12             :   under the terms of the GNU Lesser General Public License as published by
      13             :   the Free Software Foundation; either version 2.1 of the License, or
      14             :   (at your option) any later version.
      15             : 
      16             :   systemd is distributed in the hope that it will be useful, but
      17             :   WITHOUT ANY WARRANTY; without even the implied warranty of
      18             :   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
      19             :   Lesser General Public License for more details.
      20             : 
      21             :   You should have received a copy of the GNU Lesser General Public License
      22             :   along with systemd; If not, see <http://www.gnu.org/licenses/>.
      23             : ***/
      24             : 
      25             : #include <stdint.h>
      26             : #include <linux/if_packet.h>
      27             : #include <net/if_arp.h>
      28             : #include <net/ethernet.h>
      29             : 
      30             : #include "socket-util.h"
      31             : 
      32             : #include "sd-dhcp-client.h"
      33             : #include "dhcp-protocol.h"
      34             : 
      35             : int dhcp_network_bind_raw_socket(int index, union sockaddr_union *link,
      36             :                                  uint32_t xid, const uint8_t *mac_addr,
      37             :                                  size_t mac_addr_len, uint16_t arp_type);
      38             : int dhcp_network_bind_udp_socket(be32_t address, uint16_t port);
      39             : int dhcp_network_send_raw_socket(int s, const union sockaddr_union *link,
      40             :                                  const void *packet, size_t len);
      41             : int dhcp_network_send_udp_socket(int s, be32_t address, uint16_t port,
      42             :                                  const void *packet, size_t len);
      43             : 
      44             : int dhcp_option_append(DHCPMessage *message, size_t size, size_t *offset, uint8_t overload,
      45             :                        uint8_t code, size_t optlen, const void *optval);
      46             : 
      47             : typedef int (*dhcp_option_cb_t)(uint8_t code, uint8_t len,
      48             :                                 const uint8_t *option, void *user_data);
      49             : 
      50             : int dhcp_option_parse(DHCPMessage *message, size_t len,
      51             :                       dhcp_option_cb_t cb, void *user_data);
      52             : 
      53             : int dhcp_message_init(DHCPMessage *message, uint8_t op, uint32_t xid,
      54             :                       uint8_t type, uint16_t arp_type, size_t optlen,
      55             :                       size_t *optoffset);
      56             : 
      57             : uint16_t dhcp_packet_checksum(uint8_t *buf, size_t len);
      58             : 
      59             : void dhcp_packet_append_ip_headers(DHCPPacket *packet, be32_t source_addr,
      60             :                                    uint16_t source, be32_t destination_addr,
      61             :                                    uint16_t destination, uint16_t len);
      62             : 
      63             : int dhcp_packet_verify_headers(DHCPPacket *packet, size_t len, bool checksum);
      64             : 
      65          12 : DEFINE_TRIVIAL_CLEANUP_FUNC(sd_dhcp_client*, sd_dhcp_client_unref);
      66             : #define _cleanup_dhcp_client_unref_ _cleanup_(sd_dhcp_client_unrefp)
      67             : 
      68             : /* If we are invoking callbacks of a dhcp-client, ensure unreffing the
      69             :  * client from the callback doesn't destroy the object we are working
      70             :  * on */
      71             : #define DHCP_CLIENT_DONT_DESTROY(client) \
      72             :         _cleanup_dhcp_client_unref_ _unused_ sd_dhcp_client *_dont_destroy_##client = sd_dhcp_client_ref(client)
      73             : 
      74             : #define log_dhcp_client(client, fmt, ...) log_internal(LOG_DEBUG, 0, __FILE__, __LINE__, __func__, "DHCP CLIENT (0x%x): " fmt, client->xid, ##__VA_ARGS__)