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/*-*- 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.
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 <netinet/udp.h>
#include <netinet/ip.h>
#include <stdint.h>
#include "macro.h"
#include "sparse-endian.h"
struct DHCPMessage {
uint8_t op;
uint8_t htype;
uint8_t hlen;
uint8_t hops;
be32_t xid;
be16_t secs;
be16_t flags;
be32_t ciaddr;
be32_t yiaddr;
be32_t siaddr;
be32_t giaddr;
uint8_t chaddr[16];
uint8_t sname[64];
uint8_t file[128];
be32_t magic;
uint8_t options[0];
} _packed_;
typedef struct DHCPMessage DHCPMessage;
struct DHCPPacket {
struct iphdr ip;
struct udphdr udp;
DHCPMessage dhcp;
} _packed_;
typedef struct DHCPPacket DHCPPacket;
#define DHCP_IP_SIZE (int32_t)(sizeof(struct iphdr))
#define DHCP_IP_UDP_SIZE (int32_t)(sizeof(struct udphdr) + DHCP_IP_SIZE)
#define DHCP_MESSAGE_SIZE (int32_t)(sizeof(DHCPMessage))
#define DHCP_DEFAULT_MIN_SIZE 576 /* the minimum internet hosts must be able to receive */
#define DHCP_MIN_OPTIONS_SIZE DHCP_DEFAULT_MIN_SIZE - DHCP_IP_UDP_SIZE - DHCP_MESSAGE_SIZE
#define DHCP_MAGIC_COOKIE (uint32_t)(0x63825363)
enum {
DHCP_PORT_SERVER = 67,
DHCP_PORT_CLIENT = 68,
};
enum DHCPState {
DHCP_STATE_INIT = 0,
DHCP_STATE_SELECTING = 1,
DHCP_STATE_INIT_REBOOT = 2,
DHCP_STATE_REBOOTING = 3,
DHCP_STATE_REQUESTING = 4,
DHCP_STATE_BOUND = 5,
DHCP_STATE_RENEWING = 6,
DHCP_STATE_REBINDING = 7,
DHCP_STATE_STOPPED = 8,
};
typedef enum DHCPState DHCPState;
enum {
BOOTREQUEST = 1,
BOOTREPLY = 2,
};
enum {
DHCP_DISCOVER = 1,
DHCP_OFFER = 2,
DHCP_REQUEST = 3,
DHCP_DECLINE = 4,
DHCP_ACK = 5,
DHCP_NAK = 6,
DHCP_RELEASE = 7,
DHCP_INFORM = 8,
DHCP_FORCERENEW = 9,
};
enum {
DHCP_OVERLOAD_FILE = 1,
DHCP_OVERLOAD_SNAME = 2,
};
enum {
DHCP_OPTION_PAD = 0,
DHCP_OPTION_SUBNET_MASK = 1,
DHCP_OPTION_TIME_OFFSET = 2,
DHCP_OPTION_ROUTER = 3,
DHCP_OPTION_DOMAIN_NAME_SERVER = 6,
DHCP_OPTION_HOST_NAME = 12,
DHCP_OPTION_BOOT_FILE_SIZE = 13,
DHCP_OPTION_DOMAIN_NAME = 15,
DHCP_OPTION_ROOT_PATH = 17,
DHCP_OPTION_ENABLE_IP_FORWARDING = 19,
DHCP_OPTION_ENABLE_IP_FORWARDING_NL = 20,
DHCP_OPTION_POLICY_FILTER = 21,
DHCP_OPTION_INTERFACE_MDR = 22,
DHCP_OPTION_INTERFACE_TTL = 23,
DHCP_OPTION_INTERFACE_MTU_AGING_TIMEOUT = 24,
DHCP_OPTION_INTERFACE_MTU = 26,
DHCP_OPTION_BROADCAST = 28,
DHCP_OPTION_STATIC_ROUTE = 33,
DHCP_OPTION_NTP_SERVER = 42,
DHCP_OPTION_VENDOR_SPECIFIC = 43,
DHCP_OPTION_REQUESTED_IP_ADDRESS = 50,
DHCP_OPTION_IP_ADDRESS_LEASE_TIME = 51,
DHCP_OPTION_OVERLOAD = 52,
DHCP_OPTION_MESSAGE_TYPE = 53,
DHCP_OPTION_SERVER_IDENTIFIER = 54,
DHCP_OPTION_PARAMETER_REQUEST_LIST = 55,
DHCP_OPTION_MAXIMUM_MESSAGE_SIZE = 57,
DHCP_OPTION_RENEWAL_T1_TIME = 58,
DHCP_OPTION_REBINDING_T2_TIME = 59,
DHCP_OPTION_VENDOR_CLASS_IDENTIFIER = 60,
DHCP_OPTION_CLIENT_IDENTIFIER = 61,
DHCP_OPTION_FQDN = 81,
DHCP_OPTION_NEW_POSIX_TIMEZONE = 100,
DHCP_OPTION_NEW_TZDB_TIMEZONE = 101,
DHCP_OPTION_CLASSLESS_STATIC_ROUTE = 121,
DHCP_OPTION_PRIVATE_BASE = 224,
DHCP_OPTION_PRIVATE_LAST = 254,
DHCP_OPTION_END = 255,
};
#define DHCP_MAX_FQDN_LENGTH 255
enum {
DHCP_FQDN_FLAG_S = (1 << 0),
DHCP_FQDN_FLAG_O = (1 << 1),
DHCP_FQDN_FLAG_E = (1 << 2),
DHCP_FQDN_FLAG_N = (1 << 3),
};
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