/* SPDX-License-Identifier: LGPL-2.1-or-later */

#pragma once

/***

  Copyright © 2014-2015 Intel Corporation. All rights reserved.

***/

#include <net/ethernet.h>

#include <netinet/in.h>

#include "sd-event.h"

#include "list.h"

#include "hashmap.h"

#include "macro.h"

#include "sparse-endian.h"

typedef struct sd_dhcp6_option {

        unsigned n_ref;

        uint32_t enterprise_identifier;

        uint16_t option;

        void *data;

        size_t length;

} sd_dhcp6_option;

extern const struct hash_ops dhcp6_option_hash_ops;

/* Common option header */

typedef struct DHCP6Option {

        be16_t code;

        be16_t len;

        uint8_t data[];

} _packed_ DHCP6Option;

/* Address option */

struct iaaddr {

        struct in6_addr address;

        be32_t lifetime_preferred;

        be32_t lifetime_valid;

} _packed_;

/* Prefix Delegation Prefix option */

struct iapdprefix {

        be32_t lifetime_preferred;

        be32_t lifetime_valid;

        uint8_t prefixlen;

        struct in6_addr address;

} _packed_;

typedef struct DHCP6Address DHCP6Address;

struct DHCP6Address {

        LIST_FIELDS(DHCP6Address, addresses);

        union {

                struct iaaddr iaaddr;

                struct iapdprefix iapdprefix;

        };

};

/* Non-temporary Address option */

struct ia_na {

        be32_t id;

        be32_t lifetime_t1;

        be32_t lifetime_t2;

} _packed_;

/* Prefix Delegation option */

struct ia_pd {

        be32_t id;

        be32_t lifetime_t1;

        be32_t lifetime_t2;

} _packed_;

/* Temporary Address option */

struct ia_ta {

        be32_t id;

} _packed_;

struct DHCP6IA {

        uint16_t type;

        union {

                struct ia_na ia_na;

                struct ia_pd ia_pd;

                struct ia_ta ia_ta;

        };

        LIST_HEAD(DHCP6Address, addresses);

};

typedef struct DHCP6IA DHCP6IA;

#define log_dhcp6_client_errno(p, error, fmt, ...) log_internal(LOG_DEBUG, error, PROJECT_FILE, __LINE__, __func__, "DHCPv6 CLIENT: " fmt, ##__VA_ARGS__)

#define log_dhcp6_client(p, fmt, ...) log_dhcp6_client_errno(p, 0, fmt, ##__VA_ARGS__)

int dhcp6_option_append(uint8_t **buf, size_t *buflen, uint16_t code,

                        size_t optlen, const void *optval);

int dhcp6_option_append_ia(uint8_t **buf, size_t *buflen, const DHCP6IA *ia);

int dhcp6_option_append_pd(uint8_t *buf, size_t len, const DHCP6IA *pd, DHCP6Address *hint_pd_prefix);

int dhcp6_option_append_fqdn(uint8_t **buf, size_t *buflen, const char *fqdn);

int dhcp6_option_append_user_class(uint8_t **buf, size_t *buflen, char **user_class);

int dhcp6_option_append_vendor_class(uint8_t **buf, size_t *buflen, char **user_class);

int dhcp6_option_append_vendor_option(uint8_t **buf, size_t *buflen, OrderedHashmap *vendor_options);

int dhcp6_option_parse(uint8_t **buf, size_t *buflen, uint16_t *optcode,

                       size_t *optlen, uint8_t **optvalue);

int dhcp6_option_parse_status(DHCP6Option *option, size_t len);

int dhcp6_option_parse_ia(DHCP6Option *iaoption, DHCP6IA *ia, uint16_t *ret_status_code);

int dhcp6_option_parse_ip6addrs(uint8_t *optval, uint16_t optlen,

                                struct in6_addr **addrs, size_t count,

                                size_t *allocated);

int dhcp6_option_parse_domainname_list(const uint8_t *optval, uint16_t optlen,

                                       char ***str_arr);

int dhcp6_option_parse_domainname(const uint8_t *optval, uint16_t optlen, char **str);

int dhcp6_network_bind_udp_socket(int ifindex, struct in6_addr *address);

int dhcp6_network_send_udp_socket(int s, struct in6_addr *address,

                                  const void *packet, size_t len);

const char *dhcp6_message_type_to_string(int s) _const_;

int dhcp6_message_type_from_string(const char *s) _pure_;

const char *dhcp6_message_status_to_string(int s) _const_;

int dhcp6_message_status_from_string(const char *s) _pure_;