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/***************************************************************************
* Copyright (c) 2024 Microsoft Corporation
* Copyright (c) 2025-present Eclipse ThreadX Contributors
*
* This program and the accompanying materials are made available under the
* terms of the MIT License which is available at
* https://opensource.org/licenses/MIT.
*
* SPDX-License-Identifier: MIT
**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** NetX Component */
/** */
/** Reverse Address Resolution Protocol (RARP) */
/** */
/**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/* */
/* COMPONENT DEFINITION RELEASE */
/* */
/* nx_rarp.h PORTABLE C */
/* 6.4.3 */
/* AUTHOR */
/* */
/* Yuxin Zhou, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This file defines the NetX Reverse Address Resolution Protocol */
/* component, including all data types and external references. It */
/* is assumed that nx_api.h and nx_port.h have already been included. */
/* */
/**************************************************************************/
#ifndef NX_RARP_H
#define NX_RARP_H
#include "nx_api.h"
#ifndef NX_DISABLE_IPV4
/* Define RARP Message format. This will get encapsulated by an Ethernet frame
as well. The Ethernet frame will typically have a 6-byte Ethernet destination
address, a 6-byte Ethernet source address, and a 2-byte Ethernet Frame type,
which is 0x8035. Regular IP frames have a frame type of 0x0800.
Byte offset Size Meaning
0 2 Hardware type (1 for Ethernet)
2 2 Protocol type (0x0800 for IP)
4 1 Number of bytes for hardware address (6 for Ethernet)
5 1 Number of bytes for IP address (4 for IP)
6 2 Operation, ARP request is 1, ARP reply is 2
8 6 Sender's Ethernet Address
14 4 Sender's IP Address
18 6 Target Ethernet Address
24 4 Target IP Address
*/
#define NX_RARP_HARDWARE_TYPE ((ULONG)0x0001)
#define NX_RARP_PROTOCOL_TYPE ((ULONG)0x0800)
#define NX_RARP_HARDWARE_SIZE ((ULONG)0x06)
#define NX_RARP_PROTOCOL_SIZE ((ULONG)0x04)
#define NX_RARP_OPTION_REQUEST ((ULONG)0x0003)
#define NX_RARP_OPTION_RESPONSE ((ULONG)0x0004)
#define NX_RARP_MESSAGE_SIZE 28
/* Define RARP internal function prototypes. */
VOID _nx_rarp_packet_send(NX_IP *ip_ptr);
VOID _nx_rarp_packet_receive(NX_IP *ip_ptr, NX_PACKET *packet_ptr);
VOID _nx_rarp_packet_deferred_receive(NX_IP *ip_ptr, NX_PACKET *packet_ptr);
VOID _nx_rarp_periodic_update(NX_IP *ip_ptr);
VOID _nx_rarp_queue_process(NX_IP *ip_ptr);
#endif /* NX_DISABLE_IPV4 */
/* Define RARP function prototypes. */
UINT _nx_rarp_enable(NX_IP *ip_ptr);
UINT _nx_rarp_disable(NX_IP *ip_ptr);
UINT _nx_rarp_info_get(NX_IP *ip_ptr, ULONG *rarp_requests_sent, ULONG *rarp_responses_received,
ULONG *rarp_invalid_messages);
/* Define error checking shells for RARP services. These are only referenced by the
application. */
UINT _nxe_rarp_enable(NX_IP *ip_ptr);
UINT _nxe_rarp_disable(NX_IP *ip_ptr);
UINT _nxe_rarp_info_get(NX_IP *ip_ptr, ULONG *rarp_requests_sent, ULONG *rarp_responses_received,
ULONG *rarp_invalid_messages);
#endif
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