| /* 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; |