Outline ![]()
Files ![]()
loading...
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
/**************************************************************************/
/* */
/* 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"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_arp_dynamic_entries_invalidate PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Yuxin Zhou, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function invalidates all ARP dynamic entries currently in */
/* the ARP cache. */
/* */
/* INPUT */
/* */
/* ip_ptr IP instance pointer */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* tx_mutex_get Obtain protection mutex */
/* tx_mutex_put Release protection mutex */
/* _nx_arp_dynamic_entry_delete Delete dynamic ARP entry */
/* */
/* 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_dynamic_entries_invalidate(NX_IP *ip_ptr)
{
#ifndef NX_DISABLE_IPV4
NX_ARP *arp_entry;
/* If trace is enabled, insert this event into the trace buffer. */
NX_TRACE_IN_LINE_INSERT(NX_TRACE_ARP_DYNAMIC_ENTRIES_INVALIDATE, ip_ptr, ip_ptr -> nx_ip_arp_dynamic_active_count, 0, 0, NX_TRACE_ARP_EVENTS, 0, 0);
/* Obtain protection on this IP instance for access into the ARP dynamic
list. */
tx_mutex_get(&(ip_ptr -> nx_ip_protection), TX_WAIT_FOREVER);
/* Setup pointers to the starting and ending ARP entries in the dynamic list. */
arp_entry = ip_ptr -> nx_ip_arp_dynamic_list;
/* Walk through the dynamic ARP list until there are no more active entries. */
while ((arp_entry) && (ip_ptr -> nx_ip_arp_dynamic_active_count))
{
/* Remove from the dynamic list. */
_nx_arp_dynamic_entry_delete(ip_ptr, arp_entry);
/* Cleanup the nx_arp_ip_interface field. */
arp_entry -> nx_arp_ip_interface = NX_NULL;
/* Determine if we are at the end of the dynamic list. */
if (arp_entry -> nx_arp_pool_next != ip_ptr -> nx_ip_arp_dynamic_list)
{
/* No, simply move to the next dynamic entry. */
arp_entry = arp_entry -> nx_arp_pool_next;
}
else
{
/* Yes, we are at the end of the dynamic list, break out of the loop. */
break;
}
}
/* Release the mutex. */
tx_mutex_put(&(ip_ptr -> nx_ip_protection));
/* Return successful status to the caller. */
return(NX_SUCCESS);
#else /* NX_DISABLE_IPV4 */
NX_PARAMETER_NOT_USED(ip_ptr);
return(NX_NOT_SUPPORTED);
#endif /* !NX_DISABLE_IPV4 */
}