blob: 2a28387b07525b4ccd3d00b0ce6b5a0dd45056fe (
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
|
/***************************************************************************
* 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 */
/** */
/** Reverse Address Resolution Protocol (RARP) */
/** */
/**************************************************************************/
/**************************************************************************/
#define NX_SOURCE_CODE
/* Include necessary system files. */
#include "nx_api.h"
#include "nx_ip.h"
#include "nx_packet.h"
#include "nx_rarp.h"
#ifndef NX_DISABLE_IPV4
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_rarp_packet_deferred_receive PORTABLE C */
/* 6.4.3 */
/* AUTHOR */
/* */
/* Yuxin Zhou, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function receives an RARP packet from the link driver (usually */
/* the link driver's input ISR) and places it in the deferred receive */
/* RARP packet queue. This moves the minimal receive RARP packet */
/* processing from the ISR to the IP helper thread. */
/* */
/* INPUT */
/* */
/* ip_ptr Pointer to IP control block */
/* packet_ptr Pointer to packet to send */
/* */
/* OUTPUT */
/* */
/* None */
/* */
/* CALLS */
/* */
/* tx_event_flags_set Wakeup IP helper thread */
/* */
/* CALLED BY */
/* */
/* Application I/O Driver */
/* */
/**************************************************************************/
VOID _nx_rarp_packet_deferred_receive(NX_IP *ip_ptr, NX_PACKET *packet_ptr)
{
TX_INTERRUPT_SAVE_AREA
/* Disable interrupts. */
TX_DISABLE
/* Add debug information. */
NX_PACKET_DEBUG(__FILE__, __LINE__, packet_ptr);
/* Check to see if RARP is enabled on this IP instance. */
if (!ip_ptr -> nx_ip_rarp_queue_process)
{
/* RARP is not enabled. */
#ifndef NX_DISABLE_RARP_INFO
/* Increment the RARP invalid messages count... */
ip_ptr -> nx_ip_rarp_invalid_messages++;
#endif
/* Restore interrupts. */
TX_RESTORE
/* Since RARP is not enabled, just release the packet. */
_nx_packet_release(packet_ptr);
/* Return to caller. */
return;
}
/* Check to see if the RARP deferred processing queue is empty. */
if (ip_ptr -> nx_ip_rarp_deferred_received_packet_head)
{
/* Not empty, just place the packet at the end of the RARP deferred queue. */
(ip_ptr -> nx_ip_rarp_deferred_received_packet_tail) -> nx_packet_queue_next = packet_ptr;
packet_ptr -> nx_packet_queue_next = NX_NULL;
ip_ptr -> nx_ip_rarp_deferred_received_packet_tail = packet_ptr;
/* Restore interrupts. */
TX_RESTORE
}
else
{
/* Empty RARP deferred receive processing queue. Just setup the head pointers and
set the event flags to ensure the IP helper thread looks at the RARP deferred
processing queue. */
ip_ptr -> nx_ip_rarp_deferred_received_packet_head = packet_ptr;
ip_ptr -> nx_ip_rarp_deferred_received_packet_tail = packet_ptr;
packet_ptr -> nx_packet_queue_next = NX_NULL;
/* Restore interrupts. */
TX_RESTORE
/* Wakeup IP helper thread to process the RARP deferred receive. */
tx_event_flags_set(&(ip_ptr -> nx_ip_events), NX_IP_RARP_REC_EVENT, TX_OR);
}
}
#endif /* !NX_DISABLE_IPV4 */
|
