blob: 067a09c24c50f7d30dd57e6ff0dcea16b3e1dea8 (
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
|
/***************************************************************************
* 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 */
/** */
/** Internet Protocol (IP) */
/** */
/**************************************************************************/
/**************************************************************************/
#define NX_SOURCE_CODE
/* Include necessary system files. */
#include "nx_api.h"
#include "nx_ipv6.h"
#include "nx_icmpv6.h"
#ifdef FEATURE_NX_IPV6
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_ipv6_option_error PORTABLE C */
/* 6.4.3 */
/* AUTHOR */
/* */
/* Yuxin Zhou, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function handles an invalid Options header packet by examining */
/* the option header option type's most significant bits and */
/* determining if an error message is sent and if the rest of the */
/* packet should be processed or discarded. */
/* */
/* INPUT */
/* */
/* ip_ptr Pointer to IP control block */
/* packet_ptr Pointer to packet to send */
/* option_type The type of option */
/* offset Where the error occurs */
/* */
/* */
/* OUTPUT */
/* */
/* NX_SUCCESS Skip this option; no errors */
/* NX_OPTION_HEADER_ERROR Error; Drop the entire packet*/
/* */
/* CALLS */
/* */
/* None */
/* */
/* CALLED BY */
/* */
/* _nx_ipv6_process_hop_by_hop_option */
/* */
/**************************************************************************/
UINT _nx_ipv6_option_error(NX_IP *ip_ptr, NX_PACKET *packet_ptr, UCHAR option_type, UINT offset)
{
UINT rv = NX_SUCCESS;
/*lint -e{927} -e{826} suppress cast of pointer to pointer, since it is necessary */
NX_IPV6_HEADER *ip_header_ptr = (NX_IPV6_HEADER *)packet_ptr -> nx_packet_ip_header;
/* Top 2 bits of the option type indicate how we shall process this option
in case of an error. */
switch (option_type >> 6)
{
case 3: /* Discard the packet and send ICMP Parameter Problem to unicast address */
if ((ip_header_ptr -> nx_ip_header_destination_ip[0] & (ULONG)0xFF000000) == (ULONG)0xFF000000)
{
/* If the destination address is a multicast address, we discard the packet. */
rv = NX_OPTION_HEADER_ERROR;
break;
}
/*
No need to break here: execute the next two cases:
(1) transmit ICMP error message
(2) release the packet.
*/
/*lint -e{825} suppress fallthrough, since it is necessary. */ /* fallthrough */
case 2: /* Discard the packet and send ICMP Parameter Problem */
#ifndef NX_DISABLE_ICMPV6_ERROR_MESSAGE
NX_ICMPV6_SEND_PARAMETER_PROBLEM(ip_ptr, packet_ptr, 2, (ULONG)(offset + sizeof(NX_IPV6_HEADER)));
#else
NX_PARAMETER_NOT_USED(ip_ptr);
NX_PARAMETER_NOT_USED(offset);
#endif
/* No break here. Execute the next statement to release the packet. */
/*lint -e{825} suppress fallthrough, since it is necessary. */ /* fallthrough */
case 1: /* Discard the packet */
/* Error status - Drop the packet */
rv = NX_OPTION_HEADER_ERROR;
break;
case 0: /* Skip over this option and continue processing the rest of the packet. */
default:
break;
}
return(rv);
}
#endif /* FEATURE_NX_IPV6 */
|
