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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 */
/** */
/** Internet Group Management Protocol (IGMP) */
/** */
/**************************************************************************/
/**************************************************************************/
#define NX_SOURCE_CODE
/* Include necessary system files. */
#include "nx_api.h"
#include "nx_igmp.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_igmp_loopback_enable PORTABLE C */
/* 6.4.3 */
/* AUTHOR */
/* */
/* Yuxin Zhou, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function enables loopback for all subsequent IGMP groups */
/* joined by the host. */
/* */
/* INPUT */
/* */
/* ip_ptr IP instance pointer */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* _tx_mutex_get Obtain the mutex */
/* _tx_mutex_put Release the mutex */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/**************************************************************************/
UINT _nx_igmp_loopback_enable(NX_IP *ip_ptr)
{
#ifndef NX_DISABLE_IPV4
/* If trace is enabled, insert this event into the trace buffer. */
NX_TRACE_IN_LINE_INSERT(NX_TRACE_IGMP_LOOPBACK_ENABLE, ip_ptr, 0, 0, 0, NX_TRACE_IGMP_EVENTS, 0, 0);
/* Obtain the IP mutex so we can search the multicast join list. */
tx_mutex_get(&(ip_ptr -> nx_ip_protection), TX_WAIT_FOREVER);
/* Set the global IGMP loopback flag. All subsequent IGMP group join
requests will have loopback enabled. */
ip_ptr -> nx_ip_igmp_global_loopback_enable = NX_TRUE;
/* Release the protection over the IP instance. */
tx_mutex_put(&(ip_ptr -> nx_ip_protection));
/* Return a successful status! */
return(NX_SUCCESS);
#else /* NX_DISABLE_IPV4 */
NX_PARAMETER_NOT_USED(ip_ptr);
return(NX_NOT_SUPPORTED);
#endif /* !NX_DISABLE_IPV4 */
}
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