Wiesner András
ac5fc9c529
-PcktSieve special return functionality added -ARP multicast learning bug fixed -include guards have been refactored -Doxygen style tweaked
65 lines
1.5 KiB
C
65 lines
1.5 KiB
C
//
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// Created by epagris on 2022.12.08..
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//
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#ifndef ETHERLIB_ARP_PACKET_H
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#define ETHERLIB_ARP_PACKET_H
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#include <stdint.h>
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#include "ipv4_types.h"
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#include "../../packet_registry.h"
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#include "../../packet_sieve.h"
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#define ETH_ARP_PACKET_CLASS (0x0806)
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#define ETH_ARP_HEADER_SIZE (28)
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/**
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* Arp operations
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*/
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typedef enum {
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ARPOP_REQ = 1, ///< ARP Request
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ARPOP_REP = 2 ///< ARP Reply
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} ArpOp;
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typedef enum {
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ARP_HWTYPE_ETHERNET = 1
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} ArpHwType;
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/**
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* ARP properties.
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*/
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typedef struct {
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PcktPropsHeader
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uint16_t HTYPE; ///< Hardware type (Ethernet: 1)
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uint16_t PTYPE; ///< Protocol type (IP: 0x0800)
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uint8_t HLEN; ///< Hardware address length
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uint8_t PLEN; ///< Protocol address length
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uint16_t OPER; ///< Operation
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uint8_t SHA[6]; ///< Array of addresses (SHA, SPA, THA, TPA)
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ip4_addr SPA;
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uint8_t THA[6];
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ip4_addr TPA;
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} ArpProps;
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/**
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* Parse ARP packet.
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* @param hdr pointer to the packet buffer beginning with ARP header
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* @param size size of processable buffer area
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* @param pcktHdrLe linked list of packet headers
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* @param intf Ethernet interface
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* @return always 0 OR -1 on failure
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*/
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int parse_arp(const uint8_t *hdr, uint32_t size, PcktHeaderElement *pcktHdrLe, struct EthInterface_ *intf, PcktProcFnPassbackData *pb);
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/**
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* Insert ARP header into packet.
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* @param hdr pointer to the packet buffer where the ARP header is to be written
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* @param headers linked list of packet headers
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*/
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void insert_arp_header(uint8_t *hdr, const PcktHeaderElement *headers);
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#endif //ETHERLIB_ARP_PACKET_H
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