dhcp-internal.h revision e473522841f630bfd25725b06605462e5e30587f
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
#pragma once
/***
This file is part of systemd.
Copyright (C) 2013 Intel Corporation. All rights reserved.
Copyright (C) 2014 Tom Gundersen
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/>.
***/
#include <stdint.h>
#include <linux/if_packet.h>
#include <net/if_arp.h>
#include <net/ethernet.h>
#include "socket-util.h"
#include "sd-dhcp-client.h"
#include "dhcp-protocol.h"
int dhcp_network_bind_raw_socket(int index, union sockaddr_union *link,
uint32_t xid, const uint8_t *mac_addr,
size_t mac_addr_len, uint16_t arp_type);
int dhcp_network_bind_udp_socket(be32_t address, uint16_t port);
int dhcp_network_send_raw_socket(int s, const union sockaddr_union *link,
const void *packet, size_t len);
int dhcp_network_send_udp_socket(int s, be32_t address, uint16_t port,
const void *packet, size_t len);
int dhcp_option_append(DHCPMessage *message, size_t size, size_t *offset, uint8_t overload,
uint8_t code, size_t optlen, const void *optval);
typedef int (*dhcp_option_cb_t)(uint8_t code, uint8_t len,
const void *option, void *userdata);
int dhcp_option_parse(DHCPMessage *message, size_t len,
dhcp_option_cb_t cb, void *userdata);
int dhcp_message_init(DHCPMessage *message, uint8_t op, uint32_t xid,
uint8_t type, uint16_t arp_type, size_t optlen,
size_t *optoffset);
uint16_t dhcp_packet_checksum(uint8_t *buf, size_t len);
void dhcp_packet_append_ip_headers(DHCPPacket *packet, be32_t source_addr,
uint16_t source, be32_t destination_addr,
uint16_t destination, uint16_t len);
int dhcp_packet_verify_headers(DHCPPacket *packet, size_t len, bool checksum);
DEFINE_TRIVIAL_CLEANUP_FUNC(sd_dhcp_client*, sd_dhcp_client_unref);
#define _cleanup_dhcp_client_unref_ _cleanup_(sd_dhcp_client_unrefp)
/* If we are invoking callbacks of a dhcp-client, ensure unreffing the
* client from the callback doesn't destroy the object we are working
* on */
#define DHCP_CLIENT_DONT_DESTROY(client) \
_cleanup_dhcp_client_unref_ _unused_ sd_dhcp_client *_dont_destroy_##client = sd_dhcp_client_ref(client)
#define log_dhcp_client(client, fmt, ...) log_internal(LOG_DEBUG, 0, __FILE__, __LINE__, __func__, "DHCP CLIENT (0x%x): " fmt, client->xid, ##__VA_ARGS__)