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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#pragma once
#include <linux/if_infiniband.h>
#include <net/ethernet.h>
#include <stdbool.h>
#include "hash-funcs.h"
#include "in-addr-util.h"
#include "macro.h"
#include "memory-util.h"
/* This is MAX_ADDR_LEN as defined in linux/netdevice.h, but net/if_arp.h
* defines a macro of the same name with a much lower size. */
#define HW_ADDR_MAX_SIZE 32
struct hw_addr_data {
size_t length;
union {
struct ether_addr ether;
uint8_t infiniband[INFINIBAND_ALEN];
struct in_addr in;
struct in6_addr in6;
uint8_t bytes[HW_ADDR_MAX_SIZE];
};
};
int parse_hw_addr_full(const char *s, size_t expected_len, struct hw_addr_data *ret);
static inline int parse_hw_addr(const char *s, struct hw_addr_data *ret) {
return parse_hw_addr_full(s, 0, ret);
}
int parse_ether_addr(const char *s, struct ether_addr *ret);
typedef enum HardwareAddressToStringFlags {
HW_ADDR_TO_STRING_NO_COLON = 1 << 0,
} HardwareAddressToStringFlags;
#define HW_ADDR_TO_STRING_MAX (3*HW_ADDR_MAX_SIZE)
char *hw_addr_to_string_full(
const struct hw_addr_data *addr,
HardwareAddressToStringFlags flags,
char buffer[static HW_ADDR_TO_STRING_MAX]);
static inline char *hw_addr_to_string(const struct hw_addr_data *addr, char buffer[static HW_ADDR_TO_STRING_MAX]) {
return hw_addr_to_string_full(addr, 0, buffer);
}
/* Note: the lifetime of the compound literal is the immediately surrounding block,
* see C11 ยง6.5.2.5, and
* https://stackoverflow.com/questions/34880638/compound-literal-lifetime-and-if-blocks */
#define HW_ADDR_TO_STR_FULL(hw_addr, flags) hw_addr_to_string_full((hw_addr), flags, (char[HW_ADDR_TO_STRING_MAX]){})
#define HW_ADDR_TO_STR(hw_addr) HW_ADDR_TO_STR_FULL(hw_addr, 0)
#define HW_ADDR_NULL ((const struct hw_addr_data){})
struct hw_addr_data *hw_addr_set(struct hw_addr_data *addr, const uint8_t *bytes, size_t length);
void hw_addr_hash_func(const struct hw_addr_data *p, struct siphash *state);
int hw_addr_compare(const struct hw_addr_data *a, const struct hw_addr_data *b);
static inline bool hw_addr_equal(const struct hw_addr_data *a, const struct hw_addr_data *b) {
return hw_addr_compare(a, b) == 0;
}
static inline bool hw_addr_is_null(const struct hw_addr_data *addr) {
assert(addr);
return addr->length == 0 || memeqzero(addr->bytes, addr->length);
}
extern const struct hash_ops hw_addr_hash_ops;
extern const struct hash_ops hw_addr_hash_ops_free;
#define ETHER_ADDR_FORMAT_STR "%02X%02X%02X%02X%02X%02X"
#define ETHER_ADDR_FORMAT_VAL(x) (x).ether_addr_octet[0], (x).ether_addr_octet[1], (x).ether_addr_octet[2], (x).ether_addr_octet[3], (x).ether_addr_octet[4], (x).ether_addr_octet[5]
#define ETHER_ADDR_TO_STRING_MAX (3*6)
char* ether_addr_to_string(const struct ether_addr *addr, char buffer[ETHER_ADDR_TO_STRING_MAX]);
int ether_addr_to_string_alloc(const struct ether_addr *addr, char **ret);
/* Use only as function argument, never stand-alone! */
#define ETHER_ADDR_TO_STR(addr) ether_addr_to_string((addr), (char[ETHER_ADDR_TO_STRING_MAX]){})
int ether_addr_compare(const struct ether_addr *a, const struct ether_addr *b);
static inline bool ether_addr_equal(const struct ether_addr *a, const struct ether_addr *b) {
return ether_addr_compare(a, b) == 0;
}
#define ETHER_ADDR_NULL ((const struct ether_addr){})
static inline bool ether_addr_is_null(const struct ether_addr *addr) {
return ether_addr_equal(addr, ÐER_ADDR_NULL);
}
static inline bool ether_addr_is_broadcast(const struct ether_addr *addr) {
assert(addr);
return memeqbyte(0xff, addr->ether_addr_octet, ETH_ALEN);
}
static inline bool ether_addr_is_multicast(const struct ether_addr *addr) {
assert(addr);
return FLAGS_SET(addr->ether_addr_octet[0], 0x01);
}
static inline bool ether_addr_is_unicast(const struct ether_addr *addr) {
return !ether_addr_is_multicast(addr);
}
static inline bool ether_addr_is_local(const struct ether_addr *addr) {
/* Determine if the Ethernet address is locally-assigned one (IEEE 802) */
assert(addr);
return FLAGS_SET(addr->ether_addr_octet[0], 0x02);
}
static inline bool ether_addr_is_global(const struct ether_addr *addr) {
return !ether_addr_is_local(addr);
}
extern const struct hash_ops ether_addr_hash_ops;
extern const struct hash_ops ether_addr_hash_ops_free;
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