cff19c17c4
Minimal frame size is 60 bytes, but IP frame might be smaller than this size minus the ethernet header. In that case, Ethernet frames are padded so it does reach this minimal size. In this case, ethernet L2 should update the buffer list so it remove the padding length from the whole. Change-Id: Id370cad09ad82bb54febeb60b05f7e430cc8f963 Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
77 lines
1.7 KiB
C
77 lines
1.7 KiB
C
/** @file
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@brief Ethernet
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This is not to be included by the application.
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*/
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/*
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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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#ifndef __ETHERNET_H
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#define __ETHERNET_H
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#include <stdint.h>
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#include <stdbool.h>
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#include <net/net_ip.h>
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#include <net/nbuf.h>
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#include <misc/util.h>
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#define NET_ETH_BUF(buf) ((struct net_eth_hdr *)net_nbuf_ll(buf))
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#define NET_ETH_PTYPE_ARP 0x0806
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#define NET_ETH_PTYPE_IP 0x0800
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#define NET_ETH_PTYPE_IPV6 0x86dd
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#define NET_ETH_MINIMAL_FRAME_SIZE 60
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struct net_eth_addr {
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uint8_t addr[6];
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};
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struct net_eth_hdr {
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struct net_eth_addr dst;
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struct net_eth_addr src;
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uint16_t type;
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} __packed;
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static inline bool net_eth_is_addr_broadcast(struct net_eth_addr *addr)
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{
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if (addr->addr[0] == 0xff &&
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addr->addr[1] == 0xff &&
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addr->addr[2] == 0xff &&
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addr->addr[3] == 0xff &&
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addr->addr[4] == 0xff &&
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addr->addr[5] == 0xff) {
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return true;
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}
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return false;
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}
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static inline bool net_eth_is_addr_multicast(struct net_eth_addr *addr)
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{
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if (addr->addr[0] == 0x33 &&
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addr->addr[1] == 0x33) {
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return true;
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}
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return false;
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}
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const struct net_eth_addr *net_eth_broadcast_addr(void);
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#endif /* __ETHERNET_H */
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