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ether-addr-util: introduce several helper functions

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This commit is contained in:
Yu Watanabe 2021-11-06 12:15:12 +09:00
parent aac977c892
commit 1f86a3fe52
1 changed files with 22 additions and 0 deletions
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22
src/basic/ether-addr-util.h
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@ -6,6 +6,8 @@
#include <stdbool.h>
#include "hash-funcs.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. */
@ -60,6 +62,26 @@ static inline bool ether_addr_is_null(const struct ether_addr *addr) {
return ether_addr_equal(addr, &ETHER_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);
}
int ether_addr_from_string(const char *s, struct ether_addr *ret);
extern const struct hash_ops ether_addr_hash_ops;