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/**************************************************************************/
/* */
/* Copyright (c) Microsoft Corporation. All rights reserved. */
/* */
/* This software is licensed under the Microsoft Software License */
/* Terms for Microsoft Azure RTOS. Full text of the license can be */
/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
/* and in the root directory of this software. */
/* */
/**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** NetX Component */
/** */
/** Address Resolution Protocol (ARP) */
/** */
/**************************************************************************/
/**************************************************************************/
#define NX_SOURCE_CODE
/* Include necessary system files. */
#include "nx_api.h"
#include "nx_arp.h"
#include "nx_packet.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_arp_gratuitous_send PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Yuxin Zhou, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function goes through all the physical interfaces to transmit */
/* gratuitous ARP message as long as the interface IP address is */
/* valid. If a response is received at a later time, the supplied */
/* response handler is called. */
/* */
/* INPUT */
/* */
/* ip_ptr Pointer to IP instance */
/* response_handler Pointer to function to handle */
/* Gratuitous ARP response */
/* */
/* OUTPUT */
/* */
/* NX_SUCCESS Successful completion status */
/* */
/* CALLS */
/* */
/* _nx_arp_announce_send Send ARP announce */
/* tx_mutex_get Get protection mutex */
/* tx_mutex_put Put protection mutex */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Yuxin Zhou Initial Version 6.0 */
/* 09-30-2020 Yuxin Zhou Modified comment(s), */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
UINT _nx_arp_gratuitous_send(NX_IP *ip_ptr, VOID (*response_handler)(NX_IP *ip_ptr, NX_PACKET *packet_ptr))
{
#ifndef NX_DISABLE_IPV4
ULONG i;
/* Get mutex protection. */
tx_mutex_get(&(ip_ptr -> nx_ip_protection), TX_WAIT_FOREVER);
/* Save the response handler in the IP structure. */
ip_ptr -> nx_ip_arp_gratuitous_response_handler = response_handler;
/* Release mutex protection. */
tx_mutex_put(&(ip_ptr -> nx_ip_protection));
/* Loop to send ARP announce for all interfaces. */
for (i = 0; i < NX_MAX_PHYSICAL_INTERFACES; i++)
{
/* Skip the entry the IP address is invalid */
/*lint -e{539} suppress positive indentation. */
if (ip_ptr -> nx_ip_interface[i].nx_interface_ip_address == 0)
{
continue;
}
/* Send ARP announce. */
_nx_arp_announce_send(ip_ptr, i);
}
/* Return a successful completion. */
return(NX_SUCCESS);
#else /* NX_DISABLE_IPV4 */
NX_PARAMETER_NOT_USED(ip_ptr);
NX_PARAMETER_NOT_USED(response_handler);
return(NX_NOT_SUPPORTED);
#endif /* !NX_DISABLE_IPV4 */
}
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