| /* |
| * Copyright 2021 Google LLC |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef PLATFORMS_NEMORA_PORTABLE_NET_TYPES_H_ |
| #define PLATFORMS_NEMORA_PORTABLE_NET_TYPES_H_ |
| |
| #include <stdint.h> |
| |
| // Buffer big enough for largest frame we expect |
| // to receive from EMAC (in bytes) |
| // 1500 (max payload IEEE 802.3) + |
| // 14 (header) + |
| // 4 (crc, if not stripped by EMAC) + |
| // 4 (optional VLAN tag, if not stripped by EMAC) |
| #define ETH_BUFFER_SIZE 1522 |
| #define IPV4_ETHERTYPE 0x0800 |
| #define IPV6_ADDR_SIZE 16 |
| #define MAC_ADDR_SIZE 6 |
| |
| #ifndef __packed |
| #define __packed __attribute__((packed)) |
| #endif |
| |
| /* MAC address */ |
| typedef struct __packed { |
| uint8_t octet[MAC_ADDR_SIZE]; // network order |
| } mac_addr_t; |
| |
| /* |
| * Ethernet header. |
| * Note: This assumes a packet without VLAN tags. |
| * TODO: configure HW to strip VLAN field. |
| */ |
| typedef struct __packed { |
| mac_addr_t dest; |
| mac_addr_t src; |
| uint16_t ethertype; |
| } eth_hdr_t; |
| |
| #endif // PLATFORMS_NEMORA_PORTABLE_NET_TYPES_H_ |