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
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
/**************************************************************************/
/* */
/* 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"
#ifdef FEATURE_NX_IPV6
#include "nx_ipv6.h"
#endif
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_ip_interface_attach PORTABLE C */
/* 6.1.8 */
/* AUTHOR */
/* */
/* Yuxin Zhou, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function attaches a physical network interface to the IP */
/* instance, invokes the associated device driver to initialize and */
/* enable the device. */
/* */
/* If this function is called before the IP thread starts running, */
/* the deivce initialization is executed as part of the device */
/* initialization during IP thread start up phase. If this function */
/* is called after the IP thread has been started, the device */
/* initialization is executed as part of this function call. */
/* */
/* */
/* INPUT */
/* */
/* ip_ptr_value Pointer to IP control block */
/* interface_name Name of this interface */
/* ip_address Interface IP Address, in host */
/* byte order */
/* network_mask Network Mask, in host byte */
/* order */
/* ip_link_driver User supplied link driver */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* tx_mutex_get Obtain protection mutex */
/* tx_mutex_put Release protection mutex */
/* (ip_link_driver) User supplied link driver */
/* _nx_ipv6_multicast_join Join IPv6 multicast group */
/* */
/* 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 */
/* 08-02-2021 Yuxin Zhou Modified comment(s), and */
/* supported TCP/IP offload, */
/* resulting in version 6.1.8 */
/* */
/**************************************************************************/
UINT _nx_ip_interface_attach(NX_IP *ip_ptr, CHAR *interface_name, ULONG ip_address, ULONG network_mask, VOID (*ip_link_driver)(struct NX_IP_DRIVER_STRUCT *))
{
INT i;
NX_INTERFACE *nx_interface = NX_NULL;
NX_IP_DRIVER driver_request;
UINT status = NX_SUCCESS;
#if defined(FEATURE_NX_IPV6) && !defined(NX_DISABLE_ICMPV6_ROUTER_SOLICITATION)
ULONG address[4];
#endif
#ifdef NX_DISABLE_IPV4
NX_PARAMETER_NOT_USED(ip_address);
NX_PARAMETER_NOT_USED(network_mask);
#else
/* Perform duplicate address detection. */
for (i = 0; i < NX_MAX_PHYSICAL_INTERFACES; i++)
{
if ((ip_ptr -> nx_ip_interface[i].nx_interface_ip_address == ip_address) &&
(ip_address != 0))
{
/* The IPv4 address already exists. */
return(NX_DUPLICATED_ENTRY);
}
}
#endif /* !NX_DISABLE_IPV4 */
for (i = 0; i < NX_MAX_PHYSICAL_INTERFACES; i++)
{
nx_interface = &(ip_ptr -> nx_ip_interface[i]);
if (!(nx_interface -> nx_interface_valid))
{
/* Find a valid entry. */
break;
}
}
if (i == NX_MAX_PHYSICAL_INTERFACES)
{
/* No more free entry. return. */
return(NX_NO_MORE_ENTRIES);
}
/* Obtain the IP internal mutex before calling the driver. */
tx_mutex_get(&(ip_ptr -> nx_ip_protection), TX_WAIT_FOREVER);
/* Mark the entry as valid. */
nx_interface -> nx_interface_valid = NX_TRUE;
/* Fill in the interface information. */
#ifndef NX_DISABLE_IPV4
nx_interface -> nx_interface_ip_address = ip_address;
nx_interface -> nx_interface_ip_network_mask = network_mask;
nx_interface -> nx_interface_ip_network = ip_address & network_mask;
#endif /* !NX_DISABLE_IPV4 */
nx_interface -> nx_interface_link_driver_entry = ip_link_driver;
nx_interface -> nx_interface_name = interface_name;
/* If trace is enabled, insert this event into the trace buffer. */
NX_TRACE_IN_LINE_INSERT(NX_TRACE_IP_INTERFACE_ATTACH, ip_ptr, ip_address, i, 0, NX_TRACE_IP_EVENTS, 0, 0);
/* If the IP thread is already running, this service needs to go through the rest of the initializeation process. */
if (ip_ptr -> nx_ip_initialize_done == NX_TRUE)
{
#ifdef NX_ENABLE_INTERFACE_CAPABILITY
/* Clear capability flag. */
ip_ptr -> nx_ip_interface[i].nx_interface_capability_flag = 0;
#endif /* NX_ENABLE_INTERFACE_CAPABILITY */
/* First attach the interface to the device. */
driver_request.nx_ip_driver_ptr = ip_ptr;
driver_request.nx_ip_driver_command = NX_LINK_INTERFACE_ATTACH;
driver_request.nx_ip_driver_interface = &(ip_ptr -> nx_ip_interface[i]);
(ip_ptr -> nx_ip_interface[i].nx_interface_link_driver_entry)(&driver_request);
#ifdef NX_ENABLE_TCPIP_OFFLOAD
if (ip_ptr -> nx_ip_interface[i].nx_interface_capability_flag & NX_INTERFACE_CAPABILITY_TCPIP_OFFLOAD)
{
/* Set checksum capability for TCP/IP offload interface. */
ip_ptr -> nx_ip_interface[i].nx_interface_capability_flag |= NX_INTERFACE_CAPABILITY_CHECKSUM_ALL;
}
#endif /* NX_ENABLE_TCPIP_OFFLOAD */
/* Call the link driver to initialize the hardware. Among other
responsibilities, the driver is required to provide the
Maximum Transfer Unit (MTU) for the physical layer. The MTU
should represent the actual physical layer transfer size
less the physical layer headers and trailers. */
driver_request.nx_ip_driver_ptr = ip_ptr;
driver_request.nx_ip_driver_command = NX_LINK_INITIALIZE;
/* If trace is enabled, insert this event into the trace buffer. */
NX_TRACE_IN_LINE_INSERT(NX_TRACE_INTERNAL_IO_DRIVER_INITIALIZE, ip_ptr, 0, 0, 0, NX_TRACE_INTERNAL_EVENTS, 0, 0);
/*
When an IP instance is created, the first interface (nx_ip_interface[0]) is configured using parameters
provided in the IP create call.
When IP thread runs, it invokes the 1st interface link driver for link initialization.
*/
(ip_ptr -> nx_ip_interface[i].nx_interface_link_driver_entry)(&driver_request);
/* Call the link driver again to enable the interface. */
driver_request.nx_ip_driver_ptr = ip_ptr;
driver_request.nx_ip_driver_command = NX_LINK_ENABLE;
/* If trace is enabled, insert this event into the trace buffer. */
NX_TRACE_IN_LINE_INSERT(NX_TRACE_INTERNAL_IO_DRIVER_LINK_ENABLE, ip_ptr, 0, 0, 0, NX_TRACE_INTERNAL_EVENTS, 0, 0);
(ip_ptr -> nx_ip_interface[i].nx_interface_link_driver_entry)(&driver_request);
/* Also configure the all-node multicast address. */
#if defined(FEATURE_NX_IPV6) && !defined(NX_DISABLE_ICMPV6_ROUTER_SOLICITATION)
/* Create the all-node multicast group address, */
address[0] = 0xFF020000;
address[1] = 0;
address[2] = 0;
address[3] = 1;
/* Join all-node multicast group. */
status = _nx_ipv6_multicast_join(ip_ptr, address, &ip_ptr -> nx_ip_interface[i]);
#endif
}
/* Release the IP internal mutex. */
tx_mutex_put(&(ip_ptr -> nx_ip_protection));
/* All done. Return. */
return(status);
}
Details ![]()
Show: from Types: Columns: ![]( "Show Project Names")
![]( "Show Locations")
![]( "Show Referring Symbols")
![]( "Show Scope")
This file uses the notable symbols shown below. Click anywhere in the file to view more details.