1 /**************************************************************************/
2 /* */
3 /* Copyright (c) Microsoft Corporation. All rights reserved. */
4 /* */
5 /* This software is licensed under the Microsoft Software License */
6 /* Terms for Microsoft Azure RTOS. Full text of the license can be */
7 /* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
8 /* and in the root directory of this software. */
9 /* */
10 /**************************************************************************/
11
12
13 /**************************************************************************/
14 /**************************************************************************/
15 /** */
16 /** NetX Component */
17 /** */
18 /** Internet Protocol (IP) */
19 /** */
20 /**************************************************************************/
21 /**************************************************************************/
22
23 #define NX_SOURCE_CODE
24
25
26 /* Include necessary system files. */
27
28 #include "nx_api.h"
29 #include "nx_ip.h"
30 #include "tx_timer.h"
31
32
33 /**************************************************************************/
34 /* */
35 /* FUNCTION RELEASE */
36 /* */
37 /* _nx_ip_periodic_timer_entry PORTABLE C */
38 /* 6.1 */
39 /* AUTHOR */
40 /* */
41 /* Yuxin Zhou, Microsoft Corporation */
42 /* */
43 /* DESCRIPTION */
44 /* */
45 /* This function handles waking up the IP helper thread on a periodic */
46 /* basis. Periodic IP processing includes ARP requests, IP fragment */
47 /* timeouts, and TCP timeouts. All of which are driven from this */
48 /* single periodic timer. */
49 /* */
50 /* INPUT */
51 /* */
52 /* ip_address IP address in a ULONG */
53 /* */
54 /* OUTPUT */
55 /* */
56 /* None */
57 /* */
58 /* CALLS */
59 /* */
60 /* tx_event_flags_set Set event flags to wakeup */
61 /* IP helper thread */
62 /* */
63 /* CALLED BY */
64 /* */
65 /* ThreadX system timer thread */
66 /* */
67 /* RELEASE HISTORY */
68 /* */
69 /* DATE NAME DESCRIPTION */
70 /* */
71 /* 05-19-2020 Yuxin Zhou Initial Version 6.0 */
72 /* 09-30-2020 Yuxin Zhou Modified comment(s), */
73 /* resulting in version 6.1 */
74 /* */
75 /**************************************************************************/
_nx_ip_periodic_timer_entry(ULONG ip_address)76 VOID _nx_ip_periodic_timer_entry(ULONG ip_address)
77 {
78
79 NX_IP *ip_ptr;
80
81
82 /* Setup IP pointer. */
83 NX_TIMER_EXTENSION_PTR_GET(ip_ptr, NX_IP, ip_address)
84
85 /* Wakeup this IP's helper thread. */
86 tx_event_flags_set(&(ip_ptr -> nx_ip_events), NX_IP_PERIODIC_EVENT, TX_OR);
87 }
88
89
