51 lines
1.4 KiB
C
51 lines
1.4 KiB
C
//
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// Created by epagris on 2022.11.03..
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//
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#ifndef ETHERLIB_ETHERNET_FRAME_H
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#define ETHERLIB_ETHERNET_FRAME_H
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#include <stdint.h>
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#include "../../packet_registry.h"
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#include "../../packet_sieve.h"
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#define ETH_HW_ADDR_LEN (6)
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#define ETH_ETHERNET_HEADER_SIZE (14)
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#define HEADER_FETCH_PROPS(T,h) (T *)(&((h)->props))
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#define ALLOC_HEADER_ELEMENT(T) (PcktHeaderElement *) dynmem_alloc(ETH_PCKT_HEADER_ELEMENT_HEAD_SIZE + sizeof(T))
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typedef uint8_t EthernetAddress[ETH_HW_ADDR_LEN];
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/**
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* @struct EthernetProps
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* Ethernet frame properties
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*/
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typedef struct {
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PcktPropsHeader;
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EthernetAddress destAddr[ETH_HW_ADDR_LEN]; ///< destination address
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EthernetAddress sourceAddr[ETH_HW_ADDR_LEN]; ///< source address
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uint16_t length_type; ///< frame length_type
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} EthernetProps;
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struct EthInterface_;
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/**
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* Parse raw Ethernet frames.
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* @param hdr pointer to the Ethernet packet header
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* @param size total frame size
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* @param pcktHdrLe pointer to property storage
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* @return EtherType or 0 (if size is less than 1500) on success or -1 on error
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*/
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int parse_ethernet(const uint8_t *hdr, uint32_t size, PcktHeaderElement *pcktHdrLe, struct EthInterface_ *intf);
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/**
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* Insert Ethernet header to specified address.
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* @param hdr space where the header is to be inserted
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* @param headers linked list of header, top is always relevant
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*/
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void insert_ethernet_header(uint8_t * hdr, const PcktHeaderElement * headers);
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#endif //ETHERLIB_ETHERNET_FRAME_H
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