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
31
32 /**************************************************************************/
33 /* */
34 /* FUNCTION RELEASE */
35 /* */
36 /* _nx_ip_fragment_enable PORTABLE C */
37 /* 6.1 */
38 /* AUTHOR */
39 /* */
40 /* Yuxin Zhou, Microsoft Corporation */
41 /* */
42 /* DESCRIPTION */
43 /* */
44 /* This function enables the IP fragment processing by setting up the */
45 /* function pointers responsible for fragmenting and unfragmenting IP */
46 /* packets. */
47 /* */
48 /* INPUT */
49 /* */
50 /* ip_ptr Pointer to IP instance */
51 /* */
52 /* OUTPUT */
53 /* */
54 /* status Completion status */
55 /* */
56 /* CALLS */
57 /* */
58 /* None */
59 /* */
60 /* CALLED BY */
61 /* */
62 /* Application */
63 /* */
64 /* RELEASE HISTORY */
65 /* */
66 /* DATE NAME DESCRIPTION */
67 /* */
68 /* 05-19-2020 Yuxin Zhou Initial Version 6.0 */
69 /* 09-30-2020 Yuxin Zhou Modified comment(s), */
70 /* resulting in version 6.1 */
71 /* */
72 /**************************************************************************/
_nx_ip_fragment_enable(NX_IP * ip_ptr)73 UINT _nx_ip_fragment_enable(NX_IP *ip_ptr)
74 {
75 #ifndef NX_DISABLE_FRAGMENTATION
76 TX_INTERRUPT_SAVE_AREA
77
78 /* If trace is enabled, insert this event into the trace buffer. */
79 NX_TRACE_IN_LINE_INSERT(NX_TRACE_IP_FRAGMENT_ENABLE, ip_ptr, 0, 0, 0, NX_TRACE_IP_EVENTS, 0, 0);
80
81 /* Disable interrupts temporarily. */
82 TX_DISABLE
83
84 /* Setup the IP fragment processing routine pointer. */
85 ip_ptr -> nx_ip_fragment_processing = _nx_ip_fragment_packet;
86
87 /* Setup the IP fragment assembly routine pointer. */
88 ip_ptr -> nx_ip_fragment_assembly = _nx_ip_fragment_assembly;
89
90 /* Setup the IP fragment timeout routine pointer. */
91 ip_ptr -> nx_ip_fragment_timeout_check = _nx_ip_fragment_timeout_check;
92
93 /* Restore interrupts. */
94 TX_RESTORE
95
96 /* Return success to the caller. */
97 return(NX_SUCCESS);
98
99 #else /* NX_DISABLE_FRAGMENTATION */
100 NX_PARAMETER_NOT_USED(ip_ptr);
101
102 return(NX_NOT_ENABLED);
103
104 #endif /* NX_DISABLE_FRAGMENTATION */
105 }
106
107
