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https://github.com/zephyrproject-rtos/zephyr
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dfc1e66780
The net_linkaddr_cmp() will compare two link layer addresses and return true if they are the same. Change-Id: I13f5ee9e7976a4118e891aefdb6e7c08f098c0b6 Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
100 lines
2.3 KiB
C
100 lines
2.3 KiB
C
/*
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* Copyright (c) 2016 Intel Corporation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* @file
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* @brief Public API for network link address
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*/
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#ifndef __NET_LINKADDR_H__
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#define __NET_LINKADDR_H__
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#include <stdint.h>
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#include <stdbool.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief Hardware link address structure
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*
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* Used to hold the link address information
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*/
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struct net_linkaddr {
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/** The array of byte representing the address */
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uint8_t *addr;
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/** Length of that address array */
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uint8_t len;
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};
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/**
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* @brief Hardware link address structure
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*
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* Used to hold the link address information. This variant is needed
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* when we have to store the link layer address.
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* Note that you cannot cast this to net_linkaddr as they store
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* different things.
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*/
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struct net_linkaddr_storage {
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/** The real length of the ll address. */
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uint8_t len;
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union {
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/** The array of bytes representing the address */
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uint8_t addr[0];
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struct {
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/* The integer array allocate total of 8 bytes
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* that can hold currently all the supported
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* link layer addresses. These int's can be
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* used when comparing lladdr instead of using
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* memcmp()
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*/
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uint32_t storage[2];
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};
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};
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};
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/**
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* @brief Compare two link layer addresses.
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*
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* @param lladdr1 Pointer to a link layer address
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* @param lladdr2 Pointer to a link layer address
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*
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* @return True if the addresses are the same, false otherwise.
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*/
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static inline bool net_linkaddr_cmp(struct net_linkaddr *lladdr1,
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struct net_linkaddr *lladdr2)
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{
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if (!lladdr1 || !lladdr2) {
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return false;
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}
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if (lladdr1->len != lladdr2->len) {
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return false;
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}
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return !memcmp(lladdr1->addr, lladdr2->addr, lladdr1->len);
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* __NET_LINKADDR_H__ */
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