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
|
/***************************************************************************
* 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 */
/** */
/** User Datagram Protocol (UDP) */
/** */
/**************************************************************************/
/**************************************************************************/
#define NX_SOURCE_CODE
/* Include necessary system files. */
#include "nx_api.h"
#include "nx_udp.h"
#include "nx_ipv6.h"
#include "nx_ipv4.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nxd_udp_socket_extract PORTABLE C */
/* 6.4.3 */
/* AUTHOR */
/* */
/* Yuxin Zhou, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function extracts the source IP address and UDP port number */
/* from the packet received on a host UDP socket. It is up to the */
/* caller to verify the source port and ip address are valid (non null)*/
/* data. */
/* */
/* INPUT */
/* */
/* packet_ptr Pointer to UDP packet pointer */
/* ip_address Pointer to source IP address */
/* port Pointer to source UDP port */
/* */
/* OUTPUT */
/* */
/* status Actual completion status */
/* */
/* CALLS */
/* */
/* None */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/**************************************************************************/
UINT _nxd_udp_source_extract(NX_PACKET *packet_ptr, NXD_ADDRESS *ip_address, UINT *port)
{
#ifdef TX_ENABLE_EVENT_TRACE
ULONG ip_address_word3 = 0;
ULONG ip_version;
#endif
ULONG *temp_ptr;
/* Build an address to the current top of the packet. */
/*lint -e{927} -e{826} suppress cast of pointer to pointer, since it is necessary */
temp_ptr = (ULONG *)packet_ptr -> nx_packet_prepend_ptr;
/* Pickup the source port from the UDP header. */
*port = (UINT)(*(temp_ptr - 2) >> NX_SHIFT_BY_16);
/* Determine IPv4 or IPv6 connectivity. */
ip_address -> nxd_ip_version = packet_ptr -> nx_packet_ip_version;
#ifndef NX_DISABLE_IPV4
if (ip_address -> nxd_ip_version == NX_IP_VERSION_V4)
{
NX_IPV4_HEADER *ipv4_header;
/* Obtain the IPv4 header. */
/*lint -e{927} -e{826} suppress cast of pointer to pointer, since it is necessary */
ipv4_header = (NX_IPV4_HEADER *)packet_ptr -> nx_packet_ip_header;
/* Pickup the source IP address. */
ip_address -> nxd_ip_address.v4 = ipv4_header -> nx_ip_header_source_ip;
#ifdef TX_ENABLE_EVENT_TRACE
ip_version = NX_IP_VERSION_V4;
ip_address_word3 = ip_address -> nxd_ip_address.v4;
#endif /* TX_ENABLE_EVENT_TRACE */
}
#endif /* NX_DISABLE_IPV4 */
#ifdef FEATURE_NX_IPV6
if (ip_address -> nxd_ip_version == NX_IP_VERSION_V6)
{
NX_IPV6_HEADER *ipv6_header;
/* Obtain the IPv6 header. */
/*lint -e{927} -e{826} suppress cast of pointer to pointer, since it is necessary */
ipv6_header = (NX_IPV6_HEADER *)packet_ptr -> nx_packet_ip_header;
COPY_IPV6_ADDRESS(ipv6_header -> nx_ip_header_source_ip,
ip_address -> nxd_ip_address.v6);
#ifdef TX_ENABLE_EVENT_TRACE
ip_version = NX_IP_VERSION_V6;
ip_address_word3 = ip_address -> nxd_ip_address.v6[3];
#endif /* TX_ENABLE_EVENT_TRACE */
}
#endif /* FEATURE_NX_IPV6 */
#ifdef TX_ENABLE_EVENT_TRACE
/* If trace is enabled, insert this event into the trace buffer. */
NX_TRACE_IN_LINE_INSERT(NXD_TRACE_UDP_SOURCE_EXTRACT, packet_ptr, ip_version, ip_address_word3, *port, NX_TRACE_UDP_EVENTS, 0, 0);
#endif /* TX_ENABLE_EVENT_TRACE */
return(NX_SUCCESS);
}
|
