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
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
/**************************************************************************/
/* */
/* 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 */
/** */
/** Transmission Control Protocol (TCP) */
/** */
/**************************************************************************/
/**************************************************************************/
#define NX_SOURCE_CODE
/* Include necessary system files. */
#include "nx_api.h"
#include "tx_thread.h"
#include "tx_timer.h"
#include "nx_ip.h"
#include "nx_tcp.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_tcp_disconnect_cleanup PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Yuxin Zhou, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function processes TCP disconnect timeout and thread terminate */
/* actions that require the TCP socket data structures to be cleaned */
/* up. */
/* */
/* INPUT */
/* */
/* thread_ptr Pointer to suspended thread's */
/* control block */
/* */
/* OUTPUT */
/* */
/* None */
/* */
/* CALLS */
/* */
/* tx_event_flags_set Set event flag */
/* _tx_thread_system_resume Resume thread service */
/* */
/* CALLED BY */
/* */
/* _nx_tcp_deferred_cleanup_check Deferred cleanup processing */
/* _nx_tcp_socket_connection_reset Connection reset processing */
/* _nx_tcp_socket_disconnect Socket disconnect */
/* _tx_thread_timeout Thread timeout processing */
/* _tx_thread_terminate Thread terminate processing */
/* */
/* 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 */
/* */
/**************************************************************************/
VOID _nx_tcp_disconnect_cleanup(TX_THREAD *thread_ptr NX_CLEANUP_PARAMETER)
{
TX_INTERRUPT_SAVE_AREA
NX_IP *ip_ptr;
NX_TCP_SOCKET *socket_ptr; /* Working socket pointer */
NX_CLEANUP_EXTENSION
/* Disable interrupts. */
TX_DISABLE
/* Setup pointer to TCP socket control block. */
socket_ptr = (NX_TCP_SOCKET *)thread_ptr -> tx_thread_suspend_control_block;
/* Determine if the socket pointer is valid. */
if ((!socket_ptr) || (socket_ptr -> nx_tcp_socket_id != NX_TCP_ID))
{
/* Restore interrupts. */
TX_RESTORE
return;
}
/* Determine if the cleanup is still required. */
if (!(thread_ptr -> tx_thread_suspend_cleanup))
{
/* Restore interrupts. */
TX_RESTORE
return;
}
/* Determine if the caller is an ISR or the system timer thread. */
#ifndef TX_TIMER_PROCESS_IN_ISR
if ((TX_THREAD_GET_SYSTEM_STATE()) || (_tx_thread_current_ptr == &_tx_timer_thread))
#else
if (TX_THREAD_GET_SYSTEM_STATE())
#endif
{
/* Yes, defer the processing to the NetX IP thread. */
/* Yes, change the suspend cleanup routine to indicate the cleanup is deferred. */
thread_ptr -> tx_thread_suspend_cleanup = _nx_tcp_cleanup_deferred;
/* Pickup the IP pointer. */
ip_ptr = socket_ptr -> nx_tcp_socket_ip_ptr;
/* Restore interrupts. */
TX_RESTORE
/* Set the deferred cleanup flag for the IP thread. */
tx_event_flags_set(&(ip_ptr -> nx_ip_events), NX_IP_TCP_CLEANUP_DEFERRED, TX_OR);
/* Return to caller. */
return;
}
else
{
/* Yes, we still have thread suspension! */
/* Clear the suspension cleanup flag. */
thread_ptr -> tx_thread_suspend_cleanup = TX_NULL;
/* Clear the suspension pointer. */
socket_ptr -> nx_tcp_socket_disconnect_suspended_thread = NX_NULL;
/* Now we need to determine if this cleanup is from a terminate, timeout,
or from a wait abort. */
if (thread_ptr -> tx_thread_state == TX_TCP_IP)
{
/* Thread still suspended on the TCP socket. Setup return error status and
resume the thread. */
/* Setup return status. */
thread_ptr -> tx_thread_suspend_status = NX_DISCONNECT_FAILED;
/* Temporarily disable preemption. */
_tx_thread_preempt_disable++;
/* Restore interrupts. */
TX_RESTORE
/* Resume the thread! Check for preemption even though we are executing
from the system timer thread right now which normally executes at the
highest priority. */
_tx_thread_system_resume(thread_ptr);
/* Finished, just return. */
return;
}
}
/* Restore interrupts. */
TX_RESTORE
}