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 /** Address Resolution Protocol (ARP) */
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 #include "nx_arp.h"
31
32 /* Bring in externs for caller checking code. */
33
34 NX_CALLER_CHECKING_EXTERNS
35
36
37 /**************************************************************************/
38 /* */
39 /* FUNCTION RELEASE */
40 /* */
41 /* _nxe_arp_hardware_address_find PORTABLE C */
42 /* 6.1 */
43 /* AUTHOR */
44 /* */
45 /* Yuxin Zhou, Microsoft Corporation */
46 /* */
47 /* DESCRIPTION */
48 /* */
49 /* This function checks for errors in the ARP hardware address find */
50 /* function call. */
51 /* */
52 /* INPUT */
53 /* */
54 /* ip_ptr IP instance pointer */
55 /* ip_address IP Address to search for */
56 /* physical_msw Physical address MSW pointer */
57 /* physical_lsw Physical address LSW pointer */
58 /* */
59 /* OUTPUT */
60 /* */
61 /* status Completion status */
62 /* */
63 /* CALLS */
64 /* */
65 /* _nx_arp_hardware_address_find Actual hardware address find */
66 /* function */
67 /* */
68 /* CALLED BY */
69 /* */
70 /* Application Code */
71 /* */
72 /* RELEASE HISTORY */
73 /* */
74 /* DATE NAME DESCRIPTION */
75 /* */
76 /* 05-19-2020 Yuxin Zhou Initial Version 6.0 */
77 /* 09-30-2020 Yuxin Zhou Modified comment(s), */
78 /* resulting in version 6.1 */
79 /* */
80 /**************************************************************************/
_nxe_arp_hardware_address_find(NX_IP * ip_ptr,ULONG ip_address,ULONG * physical_msw,ULONG * physical_lsw)81 UINT _nxe_arp_hardware_address_find(NX_IP *ip_ptr, ULONG ip_address,
82 ULONG *physical_msw, ULONG *physical_lsw)
83 {
84
85 #ifndef NX_DISABLE_IPV4
86 UINT status;
87
88
89 /* Check for invalid input pointers. */
90 if ((ip_ptr == NX_NULL) || (ip_ptr -> nx_ip_id != NX_IP_ID) || (physical_msw == NX_NULL) || (physical_lsw == NX_NULL))
91 {
92 return(NX_PTR_ERROR);
93 }
94
95 /* Check for invalid IP address. */
96 if (!ip_address)
97 {
98 return(NX_IP_ADDRESS_ERROR);
99 }
100
101 /* Check to see if ARP is enabled. */
102 if (!ip_ptr -> nx_ip_arp_allocate)
103 {
104 return(NX_NOT_ENABLED);
105 }
106
107 /* Check for appropriate caller. */
108 NX_THREADS_ONLY_CALLER_CHECKING
109
110 /* Call actual ARP hardware address find function. */
111 status = _nx_arp_hardware_address_find(ip_ptr, ip_address, physical_msw, physical_lsw);
112
113 /* Return completion status. */
114 return(status);
115 #else /* NX_DISABLE_IPV4 */
116 NX_PARAMETER_NOT_USED(ip_ptr);
117 NX_PARAMETER_NOT_USED(ip_address);
118 NX_PARAMETER_NOT_USED(physical_msw);
119 NX_PARAMETER_NOT_USED(physical_lsw);
120
121 return(NX_NOT_SUPPORTED);
122 #endif /* !NX_DISABLE_IPV4 */
123 }
124
125
