blob: aa9bcef65ef372541886cdfcd82617f41fce1b61 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
|
/***************************************************************************
* 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 Protocol (IPv6) */
/** */
/**************************************************************************/
/**************************************************************************/
#define NX_SOURCE_CODE
/* Include necessary system files. */
#include "nx_api.h"
#include "nx_ipv6.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nxd_ipv6_multicast_interface_leave PORTABLE C */
/* 6.4.3 */
/* AUTHOR */
/* */
/* Yuxin Zhou, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This service removes the specific IPv6 multicast address from the */
/* sepcific physical interface. The link driver is also notified of */
/* the removal of the IPv6 multicast address. */
/* */
/* INPUT */
/* */
/* ip_ptr IP instance pointer */
/* group_address IPv6 multicast address */
/* interface_index Index to physical interface */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* tx_mutex_get Obtain protection mutex */
/* tx_mutex_put Release protection mutex */
/* memset Clear the memory */
/* (ip_link_driver) Device driver entry point */
/* */
/* CALLED BY */
/* */
/* Application */
/* */
/**************************************************************************/
UINT _nxd_ipv6_multicast_interface_leave(NX_IP *ip_ptr, NXD_ADDRESS *group_address, UINT interface_index)
{
#if defined(NX_ENABLE_IPV6_MULTICAST) && defined(FEATURE_NX_IPV6)
UINT i;
NX_IP_DRIVER driver_request;
NX_INTERFACE *nx_interface;
/* Obtain the IP mutex so we can search the multicast join list. */
tx_mutex_get(&(ip_ptr -> nx_ip_protection), TX_WAIT_FOREVER);
nx_interface = &ip_ptr -> nx_ip_interface[interface_index];
for (i = 0; i < NX_MAX_MULTICAST_GROUPS; i++)
{
/* Determine if the specified entry is present. */
if ((nx_interface == ip_ptr -> nx_ipv6_multicast_entry[i].nx_ip_mld_join_interface_list) && (CHECK_IPV6_ADDRESSES_SAME(ip_ptr -> nx_ipv6_multicast_entry[i].nx_ip_mld_join_list, group_address -> nxd_ip_address.v6)))
{
/* Yes, we have found the same entry. */
/* Decrease the join count. */
ip_ptr -> nx_ipv6_multicast_entry[i].nx_ip_mld_join_count--;
/* Determine if there are no other join requests for this group address. */
if (ip_ptr -> nx_ipv6_multicast_entry[i].nx_ip_mld_join_count == 0)
{
/* Clear the group join value. */
memset(ip_ptr -> nx_ipv6_multicast_entry[i].nx_ip_mld_join_list, 0, 4 * sizeof(ULONG));
/* Decrement the MLD groups joined count. */
ip_ptr -> nx_ipv6_multicast_groups_joined--;
/* Un-register the new multicast group with the underlying driver. */
driver_request.nx_ip_driver_ptr = ip_ptr;
driver_request.nx_ip_driver_command = NX_LINK_MULTICAST_LEAVE;
driver_request.nx_ip_driver_physical_address_msw = 0x00003333;
driver_request.nx_ip_driver_physical_address_lsw = group_address -> nxd_ip_address.v6[3];
driver_request.nx_ip_driver_interface = nx_interface;
(ip_ptr -> nx_ipv6_multicast_entry[i].nx_ip_mld_join_interface_list -> nx_interface_link_driver_entry)(&driver_request);
/* Now clear the interface entry. */
ip_ptr -> nx_ipv6_multicast_entry[i].nx_ip_mld_join_interface_list = NX_NULL;
}
/* Release the IP protection. */
tx_mutex_put(&(ip_ptr -> nx_ip_protection));
/* Return success! */
return(NX_SUCCESS);
}
}
/* At this point we know that the supplied entry was not found. */
/* Release the protection of the IP instance. */
tx_mutex_put(&(ip_ptr -> nx_ip_protection));
/* Return an error code. */
return(NX_ENTRY_NOT_FOUND);
#else
NX_PARAMETER_NOT_USED(ip_ptr);
NX_PARAMETER_NOT_USED(group_address);
NX_PARAMETER_NOT_USED(interface_index);
return(NX_NOT_SUPPORTED);
#endif /* NX_ENABLE_IPV6_MULTICAST && FEATURE_NX_IPV6 */
}
|
