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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#pragma once
#include <inttypes.h>
#include <net/ethernet.h>
#include <netinet/icmp6.h>
#include <netinet/in.h>
#include <netinet/ip6.h>
#include <sys/uio.h>
#include "sd-ndisc-protocol.h"
#include "icmp6-packet.h"
#include "macro.h"
#include "set.h"
#include "time-util.h"
typedef struct sd_ndisc_raw {
uint8_t *bytes;
size_t length;
} sd_ndisc_raw;
/* Mostly equivalent to struct nd_opt_prefix_info, but using usec_t. */
typedef struct sd_ndisc_prefix {
uint8_t flags;
uint8_t prefixlen;
struct in6_addr address;
usec_t valid_lifetime;
usec_t preferred_lifetime;
/* timestamp in CLOCK_BOOTTIME, used when sending option for adjusting lifetime. */
usec_t valid_until;
usec_t preferred_until;
} sd_ndisc_prefix;
typedef struct sd_ndisc_home_agent {
uint16_t preference;
usec_t lifetime;
usec_t valid_until;
} sd_ndisc_home_agent;
typedef struct sd_ndisc_route {
uint8_t preference;
uint8_t prefixlen;
struct in6_addr address;
usec_t lifetime;
usec_t valid_until;
} sd_ndisc_route;
typedef struct sd_ndisc_rdnss {
size_t n_addresses;
struct in6_addr *addresses;
usec_t lifetime;
usec_t valid_until;
} sd_ndisc_rdnss;
typedef struct sd_ndisc_dnssl {
char **domains;
usec_t lifetime;
usec_t valid_until;
} sd_ndisc_dnssl;
typedef struct sd_ndisc_prefix64 {
uint8_t prefixlen;
struct in6_addr prefix;
usec_t lifetime;
usec_t valid_until;
} sd_ndisc_prefix64;
typedef struct sd_ndisc_option {
uint8_t type;
size_t offset;
union {
sd_ndisc_raw raw; /* for testing or unsupported options */
struct ether_addr mac; /* SD_NDISC_OPTION_SOURCE_LL_ADDRESS or SD_NDISC_OPTION_TARGET_LL_ADDRESS */
sd_ndisc_prefix prefix; /* SD_NDISC_OPTION_PREFIX_INFORMATION */
struct ip6_hdr hdr; /* SD_NDISC_OPTION_REDIRECTED_HEADER */
uint32_t mtu; /* SD_NDISC_OPTION_MTU */
sd_ndisc_home_agent home_agent; /* SD_NDISC_OPTION_HOME_AGENT */
sd_ndisc_route route; /* SD_NDISC_OPTION_ROUTE_INFORMATION */
sd_ndisc_rdnss rdnss; /* SD_NDISC_OPTION_RDNSS */
uint64_t extended_flags; /* SD_NDISC_OPTION_FLAGS_EXTENSION */
sd_ndisc_dnssl dnssl; /* SD_NDISC_OPTION_DNSSL */
char *captive_portal; /* SD_NDISC_OPTION_CAPTIVE_PORTAL */
sd_ndisc_prefix64 prefix64; /* SD_NDISC_OPTION_PREF64 */
};
} sd_ndisc_option;
/* RFC 8781: PREF64 or (NAT64 prefix) */
#define PREF64_SCALED_LIFETIME_MASK 0xfff8
#define PREF64_PLC_MASK 0x0007
#define PREF64_MAX_LIFETIME_USEC (65528 * USEC_PER_SEC)
typedef enum PrefixLengthCode {
PREFIX_LENGTH_CODE_96,
PREFIX_LENGTH_CODE_64,
PREFIX_LENGTH_CODE_56,
PREFIX_LENGTH_CODE_48,
PREFIX_LENGTH_CODE_40,
PREFIX_LENGTH_CODE_32,
_PREFIX_LENGTH_CODE_MAX,
_PREFIX_LENGTH_CODE_INVALID = -EINVAL,
} PrefixLengthCode;
/* rfc8781: section 4 - Scaled Lifetime: 13-bit unsigned integer. PREFIX_LEN (Prefix Length Code): 3-bit unsigned integer */
struct nd_opt_prefix64_info {
uint8_t type;
uint8_t length;
uint16_t lifetime_and_plc;
uint8_t prefix[12];
} _packed_;
int pref64_prefix_length_to_plc(uint8_t prefixlen, uint8_t *ret);
sd_ndisc_option* ndisc_option_free(sd_ndisc_option *option);
int ndisc_option_parse(
ICMP6Packet *p,
size_t offset,
uint8_t *ret_type,
size_t *ret_len,
const uint8_t **ret_opt);
int ndisc_parse_options(ICMP6Packet *p, Set **ret_options);
static inline sd_ndisc_option* ndisc_option_get(Set *options, const sd_ndisc_option *p) {
return set_get(options, ASSERT_PTR(p));
}
static inline sd_ndisc_option* ndisc_option_get_by_type(Set *options, uint8_t type) {
return ndisc_option_get(options, &(const sd_ndisc_option) { .type = type });
}
int ndisc_option_get_mac(Set *options, uint8_t type, struct ether_addr *ret);
static inline void ndisc_option_remove(Set *options, const sd_ndisc_option *p) {
ndisc_option_free(set_remove(options, ASSERT_PTR(p)));
}
static inline void ndisc_option_remove_by_type(Set *options, uint8_t type) {
ndisc_option_remove(options, &(const sd_ndisc_option) { .type = type });
}
int ndisc_option_set_raw(
Set **options,
size_t length,
const uint8_t *bytes);
int ndisc_option_add_link_layer_address(
Set **options,
uint8_t type,
size_t offset,
const struct ether_addr *mac);
static inline int ndisc_option_set_link_layer_address(
Set **options,
uint8_t type,
const struct ether_addr *mac) {
return ndisc_option_add_link_layer_address(options, type, 0, mac);
}
int ndisc_option_add_prefix_internal(
Set **options,
size_t offset,
uint8_t flags,
uint8_t prefixlen,
const struct in6_addr *address,
usec_t valid_lifetime,
usec_t preferred_lifetime,
usec_t valid_until,
usec_t preferred_until);
static inline int ndisc_option_add_prefix(
Set **options,
size_t offset,
uint8_t flags,
uint8_t prefixlen,
const struct in6_addr *address,
usec_t valid_lifetime,
usec_t preferred_lifetime) {
return ndisc_option_add_prefix_internal(options, offset, flags, prefixlen, address,
valid_lifetime, preferred_lifetime,
USEC_INFINITY, USEC_INFINITY);
}
static inline int ndisc_option_set_prefix(
Set **options,
uint8_t flags,
uint8_t prefixlen,
const struct in6_addr *address,
usec_t valid_lifetime,
usec_t preferred_lifetime,
usec_t valid_until,
usec_t preferred_until) {
return ndisc_option_add_prefix_internal(options, 0, flags, prefixlen, address,
valid_lifetime, preferred_lifetime,
valid_until, preferred_until);
}
int ndisc_option_add_redirected_header(
Set **options,
size_t offset,
const struct ip6_hdr *hdr);
int ndisc_option_add_mtu(
Set **options,
size_t offset,
uint32_t mtu);
static inline int ndisc_option_set_mtu(
Set **options,
uint32_t mtu) {
return ndisc_option_add_mtu(options, 0, mtu);
}
int ndisc_option_add_home_agent_internal(
Set **options,
size_t offset,
uint16_t preference,
usec_t lifetime,
usec_t valid_until);
static inline int ndisc_option_add_home_agent(
Set **options,
size_t offset,
uint16_t preference,
usec_t lifetime) {
return ndisc_option_add_home_agent_internal(options, offset, preference, lifetime, USEC_INFINITY);
}
static inline int ndisc_option_set_home_agent(
Set **options,
uint16_t preference,
usec_t lifetime,
usec_t valid_until) {
return ndisc_option_add_home_agent_internal(options, 0, preference, lifetime, valid_until);
}
int ndisc_option_add_route_internal(
Set **options,
size_t offset,
uint8_t preference,
uint8_t prefixlen,
const struct in6_addr *prefix,
usec_t lifetime,
usec_t valid_until);
static inline int ndisc_option_add_route(
Set **options,
size_t offset,
uint8_t preference,
uint8_t prefixlen,
const struct in6_addr *prefix,
usec_t lifetime) {
return ndisc_option_add_route_internal(options, offset, preference, prefixlen, prefix, lifetime, USEC_INFINITY);
}
static inline int ndisc_option_set_route(
Set **options,
uint8_t preference,
uint8_t prefixlen,
const struct in6_addr *prefix,
usec_t lifetime,
usec_t valid_until) {
return ndisc_option_add_route_internal(options, 0, preference, prefixlen, prefix, lifetime, valid_until);
}
int ndisc_option_add_rdnss_internal(
Set **options,
size_t offset,
size_t n_addresses,
const struct in6_addr *addresses,
usec_t lifetime,
usec_t valid_until);
static inline int ndisc_option_add_rdnss(
Set **options,
size_t offset,
size_t n_addresses,
const struct in6_addr *addresses,
usec_t lifetime) {
return ndisc_option_add_rdnss_internal(options, offset, n_addresses, addresses, lifetime, USEC_INFINITY);
}
static inline int ndisc_option_set_rdnss(
Set **options,
size_t n_addresses,
const struct in6_addr *addresses,
usec_t lifetime,
usec_t valid_until) {
return ndisc_option_add_rdnss_internal(options, 0, n_addresses, addresses, lifetime, valid_until);
}
int ndisc_option_add_flags_extension(
Set **options,
size_t offset,
uint64_t flags);
int ndisc_option_add_dnssl_internal(
Set **options,
size_t offset,
char * const *domains,
usec_t lifetime,
usec_t valid_until);
static inline int ndisc_option_add_dnssl(
Set **options,
size_t offset,
char * const *domains,
usec_t lifetime) {
return ndisc_option_add_dnssl_internal(options, offset, domains, lifetime, USEC_INFINITY);
}
static inline int ndisc_option_set_dnssl(
Set **options,
char * const *domains,
usec_t lifetime,
usec_t valid_until) {
return ndisc_option_add_dnssl_internal(options, 0, domains, lifetime, valid_until);
}
int ndisc_option_add_captive_portal(
Set **options,
size_t offset,
const char *portal);
static inline int ndisc_option_set_captive_portal(
Set **options,
const char *portal) {
return ndisc_option_add_captive_portal(options, 0, portal);
}
int ndisc_option_add_prefix64_internal(
Set **options,
size_t offset,
uint8_t prefixlen,
const struct in6_addr *prefix,
usec_t lifetime,
usec_t valid_until);
static inline int ndisc_option_add_prefix64(
Set **options,
size_t offset,
uint8_t prefixlen,
const struct in6_addr *prefix,
usec_t lifetime) {
return ndisc_option_add_prefix64_internal(options, offset, prefixlen, prefix, lifetime, USEC_INFINITY);
}
static inline int ndisc_option_set_prefix64(
Set **options,
uint8_t prefixlen,
const struct in6_addr *prefix,
usec_t lifetime,
usec_t valid_until) {
return ndisc_option_add_prefix64_internal(options, 0, prefixlen, prefix, lifetime, valid_until);
}
int ndisc_send(int fd, const struct sockaddr_in6 *dst, const struct icmp6_hdr *hdr, Set *options, usec_t timestamp);
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