[thirdparty/systemd.git] / src / libsystemd-network / dhcp6-protocol.h

/* SPDX-License-Identifier: LGPL-2.1-or-later */
#pragma once

/***
  Copyright © 2014 Intel Corporation. All rights reserved.
***/

#include "forward.h"
#include "sparse-endian.h"

struct DHCP6Message {
        union {
                struct {
                        uint8_t type;
                        uint8_t _pad[3];
                } _packed_;
                be32_t transaction_id;
        };
        uint8_t options[];
} _packed_;

typedef struct DHCP6Message DHCP6Message;

#define DHCP6_MIN_OPTIONS_SIZE \
        1280 - sizeof(struct ip6_hdr) - sizeof(struct udphdr)

#define IN6_ADDR_ALL_DHCP6_RELAY_AGENTS_AND_SERVERS                 \
        ((const struct in6_addr) { { {                              \
                0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     \
                0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x02,     \
         } } } )

enum {
        DHCP6_PORT_SERVER                       = 547,
        DHCP6_PORT_CLIENT                       = 546,
};

#define DHCP6_INF_TIMEOUT                       (1 * USEC_PER_SEC)
#define DHCP6_INF_MAX_RT                        (120 * USEC_PER_SEC)
#define DHCP6_SOL_MAX_DELAY                     (1 * USEC_PER_SEC)
#define DHCP6_SOL_TIMEOUT                       (1 * USEC_PER_SEC)
#define DHCP6_SOL_MAX_RT                        (120 * USEC_PER_SEC)
#define DHCP6_REQ_TIMEOUT                       (1 * USEC_PER_SEC)
#define DHCP6_REQ_MAX_RT                        (120 * USEC_PER_SEC)
#define DHCP6_REQ_MAX_RC                        10
#define DHCP6_REN_TIMEOUT                       (10 * USEC_PER_SEC)
#define DHCP6_REN_MAX_RT                        (600 * USEC_PER_SEC)
#define DHCP6_REB_TIMEOUT                       (10 * USEC_PER_SEC)
#define DHCP6_REB_MAX_RT                        (600 * USEC_PER_SEC)

typedef enum DHCP6State {
        DHCP6_STATE_STOPPED,
        DHCP6_STATE_INFORMATION_REQUEST,
        DHCP6_STATE_SOLICITATION,
        DHCP6_STATE_REQUEST,
        DHCP6_STATE_BOUND,
        DHCP6_STATE_RENEW,
        DHCP6_STATE_REBIND,
        DHCP6_STATE_STOPPING,
        _DHCP6_STATE_MAX,
        _DHCP6_STATE_INVALID = -EINVAL,
} DHCP6State;

/* https://www.iana.org/assignments/dhcpv6-parameters/dhcpv6-parameters.xhtml#dhcpv6-parameters-1 */
typedef enum DHCP6MessageType {
        DHCP6_MESSAGE_SOLICIT                   = 1,  /* RFC 8415 */
        DHCP6_MESSAGE_ADVERTISE                 = 2,  /* RFC 8415 */
        DHCP6_MESSAGE_REQUEST                   = 3,  /* RFC 8415 */
        DHCP6_MESSAGE_CONFIRM                   = 4,  /* RFC 8415 */
        DHCP6_MESSAGE_RENEW                     = 5,  /* RFC 8415 */
        DHCP6_MESSAGE_REBIND                    = 6,  /* RFC 8415 */
        DHCP6_MESSAGE_REPLY                     = 7,  /* RFC 8415 */
        DHCP6_MESSAGE_RELEASE                   = 8,  /* RFC 8415 */
        DHCP6_MESSAGE_DECLINE                   = 9,  /* RFC 8415 */
        DHCP6_MESSAGE_RECONFIGURE               = 10, /* RFC 8415 */
        DHCP6_MESSAGE_INFORMATION_REQUEST       = 11, /* RFC 8415 */
        DHCP6_MESSAGE_RELAY_FORWARD             = 12, /* RFC 8415 */
        DHCP6_MESSAGE_RELAY_REPLY               = 13, /* RFC 8415 */
        DHCP6_MESSAGE_LEASE_QUERY               = 14, /* RFC 5007 */
        DHCP6_MESSAGE_LEASE_QUERY_REPLY         = 15, /* RFC 5007 */
        DHCP6_MESSAGE_LEASE_QUERY_DONE          = 16, /* RFC 5460 */
        DHCP6_MESSAGE_LEASE_QUERY_DATA          = 17, /* RFC 5460 */
        DHCP6_MESSAGE_RECONFIGURE_REQUEST       = 18, /* RFC 6977 */
        DHCP6_MESSAGE_RECONFIGURE_REPLY         = 19, /* RFC 6977 */
        DHCP6_MESSAGE_DHCPV4_QUERY              = 20, /* RFC 7341 */
        DHCP6_MESSAGE_DHCPV4_RESPONSE           = 21, /* RFC 7341 */
        DHCP6_MESSAGE_ACTIVE_LEASE_QUERY        = 22, /* RFC 7653 */
        DHCP6_MESSAGE_START_TLS                 = 23, /* RFC 7653 */
        DHCP6_MESSAGE_BINDING_UPDATE            = 24, /* RFC 8156 */
        DHCP6_MESSAGE_BINDING_REPLY             = 25, /* RFC 8156 */
        DHCP6_MESSAGE_POOL_REQUEST              = 26, /* RFC 8156 */
        DHCP6_MESSAGE_POOL_RESPONSE             = 27, /* RFC 8156 */
        DHCP6_MESSAGE_UPDATE_REQUEST            = 28, /* RFC 8156 */
        DHCP6_MESSAGE_UPDATE_REQUEST_ALL        = 29, /* RFC 8156 */
        DHCP6_MESSAGE_UPDATE_DONE               = 30, /* RFC 8156 */
        DHCP6_MESSAGE_CONNECT                   = 31, /* RFC 8156 */
        DHCP6_MESSAGE_CONNECT_REPLY             = 32, /* RFC 8156 */
        DHCP6_MESSAGE_DISCONNECT                = 33, /* RFC 8156 */
        DHCP6_MESSAGE_STATE                     = 34, /* RFC 8156 */
        DHCP6_MESSAGE_CONTACT                   = 35, /* RFC 8156 */
        _DHCP6_MESSAGE_TYPE_MAX,
        _DHCP6_MESSAGE_TYPE_INVALID             = -EINVAL,
} DHCP6MessageType;

typedef enum DHCP6NTPSubOption {
        DHCP6_NTP_SUBOPTION_SRV_ADDR            = 1,
        DHCP6_NTP_SUBOPTION_MC_ADDR             = 2,
        DHCP6_NTP_SUBOPTION_SRV_FQDN            = 3,
        _DHCP6_NTP_SUBOPTION_MAX,
        _DHCP6_NTP_SUBOPTION_INVALID            = -EINVAL,
} DHCP6NTPSubOption;

/*
 * RFC 8415, RFC 5007 and RFC 7653 status codes:
 * https://www.iana.org/assignments/dhcpv6-parameters/dhcpv6-parameters.xhtml#dhcpv6-parameters-5
 */
typedef enum DHCP6Status {
        DHCP6_STATUS_SUCCESS                      = 0,
        DHCP6_STATUS_UNSPEC_FAIL                  = 1,
        DHCP6_STATUS_NO_ADDRS_AVAIL               = 2,
        DHCP6_STATUS_NO_BINDING                   = 3,
        DHCP6_STATUS_NOT_ON_LINK                  = 4,
        DHCP6_STATUS_USE_MULTICAST                = 5,
        DHCP6_STATUS_NO_PREFIX_AVAIL              = 6,
        DHCP6_STATUS_UNKNOWN_QUERY_TYPE           = 7,
        DHCP6_STATUS_MALFORMED_QUERY              = 8,
        DHCP6_STATUS_NOT_CONFIGURED               = 9,
        DHCP6_STATUS_NOT_ALLOWED                  = 10,
        DHCP6_STATUS_QUERY_TERMINATED             = 11,
        DHCP6_STATUS_DATA_MISSING                 = 12,
        DHCP6_STATUS_CATCHUP_COMPLETE             = 13,
        DHCP6_STATUS_NOT_SUPPORTED                = 14,
        DHCP6_STATUS_TLS_CONNECTION_REFUSED       = 15,
        DHCP6_STATUS_ADDRESS_IN_USE               = 16,
        DHCP6_STATUS_CONFIGURATION_CONFLICT       = 17,
        DHCP6_STATUS_MISSING_BINDING_INFORMATION  = 18,
        DHCP6_STATUS_OUTDATED_BINDING_INFORMATION = 19,
        DHCP6_STATUS_SERVER_SHUTTING_DOWN         = 20,
        DHCP6_STATUS_DNS_UPDATE_NOT_SUPPORTED     = 21,
        DHCP6_STATUS_EXCESSIVE_TIME_SKEW          = 22,
        _DHCP6_STATUS_MAX,
        _DHCP6_STATUS_INVALID                     = -EINVAL,
} DHCP6Status;

typedef enum DHCP6FQDNFlag {
        DHCP6_FQDN_FLAG_S = 1 << 0,
        DHCP6_FQDN_FLAG_O = 1 << 1,
        DHCP6_FQDN_FLAG_N = 1 << 2,
} DHCP6FQDNFlag;

const char* dhcp6_state_to_string(DHCP6State s) _const_;
const char* dhcp6_message_type_to_string(DHCP6MessageType s) _const_;
DHCP6MessageType dhcp6_message_type_from_string(const char *s) _pure_;
const char* dhcp6_message_status_to_string(DHCP6Status s) _const_;
DHCP6Status dhcp6_message_status_from_string(const char *s) _pure_;
int dhcp6_message_status_to_errno(DHCP6Status s);
Commit	Line	Data
	1	/* SPDX-License-Identifier: LGPL-2.1-or-later */
	2	#pragma once
	3
	4	/***
	5	Copyright © 2014 Intel Corporation. All rights reserved.
	6	***/
	7
	8	#include "forward.h"
	9	#include "sparse-endian.h"
	10
	11	struct DHCP6Message {
	12	union {
	13	struct {
	14	uint8_t type;
	15	uint8_t _pad[3];
	16	} _packed_;
	17	be32_t transaction_id;
	18	};
	19	uint8_t options[];
	20	} _packed_;
	21
	22	typedef struct DHCP6Message DHCP6Message;
	23
	24	#define DHCP6_MIN_OPTIONS_SIZE \
	25	1280 - sizeof(struct ip6_hdr) - sizeof(struct udphdr)
	26
	27	#define IN6_ADDR_ALL_DHCP6_RELAY_AGENTS_AND_SERVERS \
	28	((const struct in6_addr) { { { \
	29	0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
	30	0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x02, \
	31	} } } )
	32
	33	enum {
	34	DHCP6_PORT_SERVER = 547,
	35	DHCP6_PORT_CLIENT = 546,
	36	};
	37
	38	#define DHCP6_INF_TIMEOUT (1 * USEC_PER_SEC)
	39	#define DHCP6_INF_MAX_RT (120 * USEC_PER_SEC)
	40	#define DHCP6_SOL_MAX_DELAY (1 * USEC_PER_SEC)
	41	#define DHCP6_SOL_TIMEOUT (1 * USEC_PER_SEC)
	42	#define DHCP6_SOL_MAX_RT (120 * USEC_PER_SEC)
	43	#define DHCP6_REQ_TIMEOUT (1 * USEC_PER_SEC)
	44	#define DHCP6_REQ_MAX_RT (120 * USEC_PER_SEC)
	45	#define DHCP6_REQ_MAX_RC 10
	46	#define DHCP6_REN_TIMEOUT (10 * USEC_PER_SEC)
	47	#define DHCP6_REN_MAX_RT (600 * USEC_PER_SEC)
	48	#define DHCP6_REB_TIMEOUT (10 * USEC_PER_SEC)
	49	#define DHCP6_REB_MAX_RT (600 * USEC_PER_SEC)
	50
	51	typedef enum DHCP6State {
	52	DHCP6_STATE_STOPPED,
	53	DHCP6_STATE_INFORMATION_REQUEST,
	54	DHCP6_STATE_SOLICITATION,
	55	DHCP6_STATE_REQUEST,
	56	DHCP6_STATE_BOUND,
	57	DHCP6_STATE_RENEW,
	58	DHCP6_STATE_REBIND,
	59	DHCP6_STATE_STOPPING,
	60	_DHCP6_STATE_MAX,
	61	_DHCP6_STATE_INVALID = -EINVAL,
	62	} DHCP6State;
	63
	64	/* https://www.iana.org/assignments/dhcpv6-parameters/dhcpv6-parameters.xhtml#dhcpv6-parameters-1 */
	65	typedef enum DHCP6MessageType {
	66	DHCP6_MESSAGE_SOLICIT = 1, /* RFC 8415 */
	67	DHCP6_MESSAGE_ADVERTISE = 2, /* RFC 8415 */
	68	DHCP6_MESSAGE_REQUEST = 3, /* RFC 8415 */
	69	DHCP6_MESSAGE_CONFIRM = 4, /* RFC 8415 */
	70	DHCP6_MESSAGE_RENEW = 5, /* RFC 8415 */
	71	DHCP6_MESSAGE_REBIND = 6, /* RFC 8415 */
	72	DHCP6_MESSAGE_REPLY = 7, /* RFC 8415 */
	73	DHCP6_MESSAGE_RELEASE = 8, /* RFC 8415 */
	74	DHCP6_MESSAGE_DECLINE = 9, /* RFC 8415 */
	75	DHCP6_MESSAGE_RECONFIGURE = 10, /* RFC 8415 */
	76	DHCP6_MESSAGE_INFORMATION_REQUEST = 11, /* RFC 8415 */
	77	DHCP6_MESSAGE_RELAY_FORWARD = 12, /* RFC 8415 */
	78	DHCP6_MESSAGE_RELAY_REPLY = 13, /* RFC 8415 */
	79	DHCP6_MESSAGE_LEASE_QUERY = 14, /* RFC 5007 */
	80	DHCP6_MESSAGE_LEASE_QUERY_REPLY = 15, /* RFC 5007 */
	81	DHCP6_MESSAGE_LEASE_QUERY_DONE = 16, /* RFC 5460 */
	82	DHCP6_MESSAGE_LEASE_QUERY_DATA = 17, /* RFC 5460 */
	83	DHCP6_MESSAGE_RECONFIGURE_REQUEST = 18, /* RFC 6977 */
	84	DHCP6_MESSAGE_RECONFIGURE_REPLY = 19, /* RFC 6977 */
	85	DHCP6_MESSAGE_DHCPV4_QUERY = 20, /* RFC 7341 */
	86	DHCP6_MESSAGE_DHCPV4_RESPONSE = 21, /* RFC 7341 */
	87	DHCP6_MESSAGE_ACTIVE_LEASE_QUERY = 22, /* RFC 7653 */
	88	DHCP6_MESSAGE_START_TLS = 23, /* RFC 7653 */
	89	DHCP6_MESSAGE_BINDING_UPDATE = 24, /* RFC 8156 */
	90	DHCP6_MESSAGE_BINDING_REPLY = 25, /* RFC 8156 */
	91	DHCP6_MESSAGE_POOL_REQUEST = 26, /* RFC 8156 */
	92	DHCP6_MESSAGE_POOL_RESPONSE = 27, /* RFC 8156 */
	93	DHCP6_MESSAGE_UPDATE_REQUEST = 28, /* RFC 8156 */
	94	DHCP6_MESSAGE_UPDATE_REQUEST_ALL = 29, /* RFC 8156 */
	95	DHCP6_MESSAGE_UPDATE_DONE = 30, /* RFC 8156 */
	96	DHCP6_MESSAGE_CONNECT = 31, /* RFC 8156 */
	97	DHCP6_MESSAGE_CONNECT_REPLY = 32, /* RFC 8156 */
	98	DHCP6_MESSAGE_DISCONNECT = 33, /* RFC 8156 */
	99	DHCP6_MESSAGE_STATE = 34, /* RFC 8156 */
	100	DHCP6_MESSAGE_CONTACT = 35, /* RFC 8156 */
	101	_DHCP6_MESSAGE_TYPE_MAX,
	102	_DHCP6_MESSAGE_TYPE_INVALID = -EINVAL,
	103	} DHCP6MessageType;
	104
	105	typedef enum DHCP6NTPSubOption {
	106	DHCP6_NTP_SUBOPTION_SRV_ADDR = 1,
	107	DHCP6_NTP_SUBOPTION_MC_ADDR = 2,
	108	DHCP6_NTP_SUBOPTION_SRV_FQDN = 3,
	109	_DHCP6_NTP_SUBOPTION_MAX,
	110	_DHCP6_NTP_SUBOPTION_INVALID = -EINVAL,
	111	} DHCP6NTPSubOption;
	112
	113	/*
	114	* RFC 8415, RFC 5007 and RFC 7653 status codes:
	115	* https://www.iana.org/assignments/dhcpv6-parameters/dhcpv6-parameters.xhtml#dhcpv6-parameters-5
	116	*/
	117	typedef enum DHCP6Status {
	118	DHCP6_STATUS_SUCCESS = 0,
	119	DHCP6_STATUS_UNSPEC_FAIL = 1,
	120	DHCP6_STATUS_NO_ADDRS_AVAIL = 2,
	121	DHCP6_STATUS_NO_BINDING = 3,
	122	DHCP6_STATUS_NOT_ON_LINK = 4,
	123	DHCP6_STATUS_USE_MULTICAST = 5,
	124	DHCP6_STATUS_NO_PREFIX_AVAIL = 6,
	125	DHCP6_STATUS_UNKNOWN_QUERY_TYPE = 7,
	126	DHCP6_STATUS_MALFORMED_QUERY = 8,
	127	DHCP6_STATUS_NOT_CONFIGURED = 9,
	128	DHCP6_STATUS_NOT_ALLOWED = 10,
	129	DHCP6_STATUS_QUERY_TERMINATED = 11,
	130	DHCP6_STATUS_DATA_MISSING = 12,
	131	DHCP6_STATUS_CATCHUP_COMPLETE = 13,
	132	DHCP6_STATUS_NOT_SUPPORTED = 14,
	133	DHCP6_STATUS_TLS_CONNECTION_REFUSED = 15,
	134	DHCP6_STATUS_ADDRESS_IN_USE = 16,
	135	DHCP6_STATUS_CONFIGURATION_CONFLICT = 17,
	136	DHCP6_STATUS_MISSING_BINDING_INFORMATION = 18,
	137	DHCP6_STATUS_OUTDATED_BINDING_INFORMATION = 19,
	138	DHCP6_STATUS_SERVER_SHUTTING_DOWN = 20,
	139	DHCP6_STATUS_DNS_UPDATE_NOT_SUPPORTED = 21,
	140	DHCP6_STATUS_EXCESSIVE_TIME_SKEW = 22,
	141	_DHCP6_STATUS_MAX,
	142	_DHCP6_STATUS_INVALID = -EINVAL,
	143	} DHCP6Status;
	144
	145	typedef enum DHCP6FQDNFlag {
	146	DHCP6_FQDN_FLAG_S = 1 << 0,
	147	DHCP6_FQDN_FLAG_O = 1 << 1,
	148	DHCP6_FQDN_FLAG_N = 1 << 2,
	149	} DHCP6FQDNFlag;
	150
	151	const char* dhcp6_state_to_string(DHCP6State s) _const_;
	152	const char* dhcp6_message_type_to_string(DHCP6MessageType s) _const_;
	153	DHCP6MessageType dhcp6_message_type_from_string(const char *s) _pure_;
	154	const char* dhcp6_message_status_to_string(DHCP6Status s) _const_;
	155	DHCP6Status dhcp6_message_status_from_string(const char *s) _pure_;
	156	int dhcp6_message_status_to_errno(DHCP6Status s);