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
144
145
146
147
148
149
150
|
/***************************************************************************
* 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 version 6 Default Router Table (IPv6 router) */
/** */
/**************************************************************************/
/**************************************************************************/
#define NX_SOURCE_CODE
/* Include necessary system files. */
#include "nx_api.h"
#include "nx_ipv6.h"
#ifdef FEATURE_NX_IPV6
#include "nx_nd_cache.h"
#include "nx_icmpv6.h"
#endif /* FEATURE_NX_IPV6 */
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nxd_ipv6_default_router_delete PORTABLE C */
/* 6.4.3 */
/* AUTHOR */
/* */
/* Yuxin Zhou, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function deletes an IPv6 routing table entry. */
/* */
/* INPUT */
/* */
/* ip_ptr Pointer to IP control block */
/* router_addr Pointer to router address to */
/* delete */
/* */
/* OUTPUT */
/* */
/* NX_SUCCESS Successful completion status */
/* */
/* CALLS */
/* */
/* tx_mutex_get Obtain protection mutex */
/* tx_mutex_put Release protection mutex */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/**************************************************************************/
UINT _nxd_ipv6_default_router_delete(NX_IP *ip_ptr, NXD_ADDRESS *router_address)
{
#ifdef FEATURE_NX_IPV6
INT i;
NX_IPV6_DEFAULT_ROUTER_ENTRY *rt_entry;
NX_TRACE_IN_LINE_INSERT(NXD_TRACE_IPV6_DEFAULT_ROUTER_DELETE,
ip_ptr, router_address -> nxd_ip_address.v6[3], 0, 0, NX_TRACE_IP_EVENTS, 0, 0);
/* Obtain protection on this IP instance for access into the default router table. */
tx_mutex_get(&(ip_ptr -> nx_ip_protection), TX_WAIT_FOREVER);
/* If our default route table is empty, just return */
if (ip_ptr -> nx_ipv6_default_router_table_size == 0)
{
/* Release the mutex. */
tx_mutex_put(&(ip_ptr -> nx_ip_protection));
return(NX_SUCCESS);
}
/* Search the entire table for a matching entry. */
for (i = 0; i < NX_IPV6_DEFAULT_ROUTER_TABLE_SIZE; i++)
{
/*Set local pointer for convenience. */
rt_entry = &ip_ptr -> nx_ipv6_default_router_table[i];
/* Does this slot contain a router? */
if (rt_entry -> nx_ipv6_default_router_entry_flag & NX_IPV6_ROUTE_TYPE_VALID)
{
/* Does it match the router address to search for? */
if (CHECK_IPV6_ADDRESSES_SAME(router_address -> nxd_ip_address.v6,
rt_entry -> nx_ipv6_default_router_entry_router_address))
{
/* Yes, does it have a pointer into the cache table? */
if (rt_entry -> nx_ipv6_default_router_entry_neighbor_cache_ptr)
{
/* Clear the router status. This will enable the entry
to time out eventually. */
rt_entry -> nx_ipv6_default_router_entry_neighbor_cache_ptr -> nx_nd_cache_is_router = NX_NULL;
}
/* Clean any entries in the destination table for this router. */
_nx_invalidate_destination_entry(ip_ptr, rt_entry -> nx_ipv6_default_router_entry_router_address);
/* Mark the entry as empty. */
rt_entry -> nx_ipv6_default_router_entry_flag = 0;
/* Clear the interface pointer .*/
rt_entry -> nx_ipv6_default_router_entry_interface_ptr = NX_NULL;
/* Decrease the count of available routers. */
ip_ptr -> nx_ipv6_default_router_table_size--;
/* Release the mutex. */
tx_mutex_put(&(ip_ptr -> nx_ip_protection));
return(NX_SUCCESS);
}
}
}
/* Release the mutex. */
tx_mutex_put(&(ip_ptr -> nx_ip_protection));
return(NX_NOT_FOUND);
#else /* !FEATURE_NX_IPV6 */
NX_PARAMETER_NOT_USED(ip_ptr);
NX_PARAMETER_NOT_USED(router_address);
return(NX_NOT_SUPPORTED);
#endif /* FEATURE_NX_IPV6 */
}
|
