[thirdparty/systemd.git] / src / libsystemd-network / dhcp-protocol.h

/*-*- 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_CLASSLESS_STATIC_ROUTE      = 121,
        DHCP_OPTION_PRIVATE_BASE                = 224,
        DHCP_OPTION_PRIVATE_LAST                = 254,
        DHCP_OPTION_END                         = 255,
};
Commit	Line	Data
5f404b1e PF	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
	10	systemd is free software; you can redistribute it and/or modify it
	11	under the terms of the GNU Lesser General Public License as published by
	12	the Free Software Foundation; either version 2.1 of the License, or
	13	(at your option) any later version.
	14
	15	systemd is distributed in the hope that it will be useful, but
	16	WITHOUT ANY WARRANTY; without even the implied warranty of
	17	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	18	Lesser General Public License for more details.
	19
	20	You should have received a copy of the GNU Lesser General Public License
	21	along with systemd; If not, see <http://www.gnu.org/licenses/>.
	22	***/
	23
	24	#include <netinet/udp.h>
	25	#include <netinet/ip.h>
	26	#include <stdint.h>
	27
	28	#include "macro.h"
	29	#include "sparse-endian.h"
	30
	31	struct DHCPMessage {
	32	uint8_t op;
	33	uint8_t htype;
	34	uint8_t hlen;
	35	uint8_t hops;
	36	be32_t xid;
	37	be16_t secs;
	38	be16_t flags;
3b349af6 PF	39	be32_t ciaddr;
	40	be32_t yiaddr;
	41	be32_t siaddr;
	42	be32_t giaddr;
5f404b1e PF	43	uint8_t chaddr[16];
	44	uint8_t sname[64];
	45	uint8_t file[128];
3b7ca119	46	be32_t magic;
20b958bf	47	uint8_t options[0];
5f404b1e PF	48	} _packed_;
	49
	50	typedef struct DHCPMessage DHCPMessage;
	51
	52	struct DHCPPacket {
	53	struct iphdr ip;
	54	struct udphdr udp;
	55	DHCPMessage dhcp;
	56	} _packed_;
	57
	58	typedef struct DHCPPacket DHCPPacket;
	59
8c00042c PF	60	#define DHCP_IP_SIZE (int32_t)(sizeof(struct iphdr))
	61	#define DHCP_IP_UDP_SIZE (int32_t)(sizeof(struct udphdr) + DHCP_IP_SIZE)
	62	#define DHCP_MESSAGE_SIZE (int32_t)(sizeof(DHCPMessage))
324f8187 TG	63	#define DHCP_DEFAULT_MIN_SIZE 576 /* the minimum internet hosts must be able to receive */
324f8187 TG	64	#define DHCP_MIN_OPTIONS_SIZE DHCP_DEFAULT_MIN_SIZE - DHCP_IP_UDP_SIZE - DHCP_MESSAGE_SIZE
3b7ca119	65	#define DHCP_MAGIC_COOKIE (uint32_t)(0x63825363)
8c00042c	66
46a66b79 PF	67	enum {
	68	DHCP_PORT_SERVER = 67,
	69	DHCP_PORT_CLIENT = 68,
	70	};
	71
5f404b1e PF	72	enum DHCPState {
	73	DHCP_STATE_INIT = 0,
	74	DHCP_STATE_SELECTING = 1,
	75	DHCP_STATE_INIT_REBOOT = 2,
	76	DHCP_STATE_REBOOTING = 3,
	77	DHCP_STATE_REQUESTING = 4,
	78	DHCP_STATE_BOUND = 5,
	79	DHCP_STATE_RENEWING = 6,
	80	DHCP_STATE_REBINDING = 7,
781ca7a1	81	DHCP_STATE_STOPPED = 8,
5f404b1e PF	82	};
	83
	84	typedef enum DHCPState DHCPState;
	85
	86	enum {
	87	BOOTREQUEST = 1,
	88	BOOTREPLY = 2,
	89	};
	90
	91	enum {
	92	DHCP_DISCOVER = 1,
	93	DHCP_OFFER = 2,
	94	DHCP_REQUEST = 3,
	95	DHCP_DECLINE = 4,
	96	DHCP_ACK = 5,
	97	DHCP_NAK = 6,
	98	DHCP_RELEASE = 7,
615c1467 TG	99	DHCP_INFORM = 8,
615c1467 TG	100	DHCP_FORCERENEW = 9,
5f404b1e PF	101	};
	102
	103	enum {
	104	DHCP_OVERLOAD_FILE = 1,
	105	DHCP_OVERLOAD_SNAME = 2,
	106	};
	107
	108	enum {
	109	DHCP_OPTION_PAD = 0,
	110	DHCP_OPTION_SUBNET_MASK = 1,
f5c0c00f	111	DHCP_OPTION_TIME_OFFSET = 2,
5f404b1e PF	112	DHCP_OPTION_ROUTER = 3,
	113	DHCP_OPTION_DOMAIN_NAME_SERVER = 6,
	114	DHCP_OPTION_HOST_NAME = 12,
f5c0c00f	115	DHCP_OPTION_BOOT_FILE_SIZE = 13,
5f404b1e	116	DHCP_OPTION_DOMAIN_NAME = 15,
ce78df79	117	DHCP_OPTION_ROOT_PATH = 17,
f5c0c00f TG	118	DHCP_OPTION_ENABLE_IP_FORWARDING = 19,
	119	DHCP_OPTION_ENABLE_IP_FORWARDING_NL = 20,
	120	DHCP_OPTION_POLICY_FILTER = 21,
	121	DHCP_OPTION_INTERFACE_MDR = 22,
	122	DHCP_OPTION_INTERFACE_TTL = 23,
	123	DHCP_OPTION_INTERFACE_MTU_AGING_TIMEOUT = 24,
4f882b2a	124	DHCP_OPTION_INTERFACE_MTU = 26,
f5c0c00f TG	125	DHCP_OPTION_BROADCAST = 28,
f5c0c00f TG	126	DHCP_OPTION_STATIC_ROUTE = 33,
5f404b1e	127	DHCP_OPTION_NTP_SERVER = 42,
e43a8393	128	DHCP_OPTION_VENDOR_SPECIFIC = 43,
5f404b1e	129	DHCP_OPTION_REQUESTED_IP_ADDRESS = 50,
8c00042c	130	DHCP_OPTION_IP_ADDRESS_LEASE_TIME = 51,
5f404b1e PF	131	DHCP_OPTION_OVERLOAD = 52,
5f404b1e PF	132	DHCP_OPTION_MESSAGE_TYPE = 53,
8c00042c	133	DHCP_OPTION_SERVER_IDENTIFIER = 54,
5f404b1e	134	DHCP_OPTION_PARAMETER_REQUEST_LIST = 55,
564ba3b0	135	DHCP_OPTION_MAXIMUM_MESSAGE_SIZE = 57,
51debc1e PF	136	DHCP_OPTION_RENEWAL_T1_TIME = 58,
51debc1e PF	137	DHCP_OPTION_REBINDING_T2_TIME = 59,
edb85f0d	138	DHCP_OPTION_VENDOR_CLASS_IDENTIFIER = 60,
46a66b79	139	DHCP_OPTION_CLIENT_IDENTIFIER = 61,
e1ea665e	140	DHCP_OPTION_CLASSLESS_STATIC_ROUTE = 121,
85e22bfc AC	141	DHCP_OPTION_PRIVATE_BASE = 224,
85e22bfc AC	142	DHCP_OPTION_PRIVATE_LAST = 254,
5f404b1e PF	143	DHCP_OPTION_END = 255,
5f404b1e PF	144	};