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
185
186
187
/**************************************************************************/
/* */
/* 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 */
/** */
/** Internet Protocol (IP) */
/** */
/**************************************************************************/
/**************************************************************************/
#define NX_SOURCE_CODE
/* Include necessary system files. */
#include "nx_api.h"
#include "nx_ip.h"
#include "nx_ipv6.h"
#include "nx_packet.h"
/* Bring in externs for caller checking code. */
NX_CALLER_CHECKING_EXTERNS
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nxde_ip_raw_packet_send PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Yuxin Zhou, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function sends a raw IP packet through the specified IPv6 */
/* interface. */
/* */
/* INPUT */
/* */
/* ip_ptr Pointer to IP control block */
/* packet_ptr Pointer to packet to send */
/* destination_ip Destination IP address */
/* protocol Value for the protocol field */
/* ttl Value for ttl or hop limit */
/* tos Value for tos or traffic */
/* class and flow label */
/* */
/* OUTPUT */
/* */
/* status Actual completion status */
/* NX_PTR_ERROR Invalid pointer input */
/* NX_NOT_ENABLED Raw IP not enabled */
/* NX_IP_ADDRESS_ERROR Invalid address version */
/* NX_INVALID_PARAMETERS Invalid protocol specified */
/* NX_UNDERFLOW Invalid packet header */
/* */
/* CALLS */
/* */
/* _nxd_ip_raw_packet_source_send Actual raw packet send */
/* function. */
/* */
/* CALLED BY */
/* */
/* Application */
/* */
/* 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 */
/* */
/**************************************************************************/
UINT _nxde_ip_raw_packet_send(NX_IP *ip_ptr, NX_PACKET **packet_ptr_ptr,
NXD_ADDRESS *destination_ip, ULONG protocol, UINT ttl, ULONG tos)
{
NX_PACKET *packet_ptr;
/* Setup packet pointer. */
packet_ptr = *packet_ptr_ptr;
/* Check for invalid input pointers. */
/* Cast the ULONG into a packet pointer. Since this is exactly what we wish to do, disable the lint warning with the following comment: */
/*lint -e{923} suppress cast of ULONG to pointer. */
if ((ip_ptr == NX_NULL) || (ip_ptr -> nx_ip_id != NX_IP_ID) || (packet_ptr == NX_NULL) ||
(packet_ptr -> nx_packet_union_next.nx_packet_tcp_queue_next != ((NX_PACKET *)NX_PACKET_ALLOCATED)))
{
return(NX_PTR_ERROR);
}
/* Check to see if IP raw packet processing is enabled. */
if (!ip_ptr -> nx_ip_raw_ip_processing)
{
return(NX_NOT_ENABLED);
}
/* Check for invalid IP address. */
if (!destination_ip || ((destination_ip -> nxd_ip_version != NX_IP_VERSION_V6) &&
(destination_ip -> nxd_ip_version != NX_IP_VERSION_V4)))
{
return(NX_IP_ADDRESS_ERROR);
}
/* Check for valid protocol. */
if ((protocol & 0x000000FF) != protocol)
{
return(NX_INVALID_PARAMETERS);
}
#ifndef NX_DISABLE_IPV4
if (destination_ip -> nxd_ip_version == NX_IP_VERSION_V4)
{
/* Check for an invalid packet prepend pointer for IPv4 packet. */
/*lint -e{946} suppress pointer subtraction, since it is necessary. */
if ((packet_ptr -> nx_packet_prepend_ptr - sizeof(NX_IPV4_HEADER)) < packet_ptr -> nx_packet_data_start)
{
return(NX_UNDERFLOW);
}
if (destination_ip -> nxd_ip_address.v4 == 0)
{
return(NX_IP_ADDRESS_ERROR);
}
}
#endif /* !NX_DISABLE_IPV4 */
#ifdef FEATURE_NX_IPV6
if (destination_ip -> nxd_ip_version == NX_IP_VERSION_V6)
{
/* Check for an invalid packet prepend pointer for IPv6 packet. */
/*lint -e{946} suppress pointer subtraction, since it is necessary. */
if ((packet_ptr -> nx_packet_prepend_ptr - sizeof(NX_IPV6_HEADER)) < packet_ptr -> nx_packet_data_start)
{
return(NX_UNDERFLOW);
}
if (CHECK_UNSPECIFIED_ADDRESS(&destination_ip -> nxd_ip_address.v6[0]))
{
return(NX_IP_ADDRESS_ERROR);
}
}
#endif /* FEATURE_NX_IPV6 */
/* Check for an invalid packet append pointer. */
/*lint -e{946} suppress pointer subtraction, since it is necessary. */
if (packet_ptr -> nx_packet_append_ptr > packet_ptr -> nx_packet_data_end)
{
return(NX_OVERFLOW);
}
/* Check for appropriate caller. */
NX_THREADS_ONLY_CALLER_CHECKING
_nxd_ip_raw_packet_source_send(ip_ptr, packet_ptr, destination_ip, 0, protocol, ttl, tos);
/* Now clear the application's packet pointer so it can't be accidentally
used again by the application. This is only done when error checking is
enabled. */
*packet_ptr_ptr = NX_NULL;
/* Return completion status. */
return(NX_SUCCESS);
}