1 /*
2 * Copyright (c) 2021, The OpenThread Authors.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * 3. Neither the name of the copyright holder nor the
13 * names of its contributors may be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 /**
30 * @file
31 * This file implements IPv4 address related functionality.
32 */
33
34 #include "ip4_address.hpp"
35
36 #include "common/code_utils.hpp"
37 #include "common/numeric_limits.hpp"
38
39 namespace ot {
40 namespace Ip4 {
41
FromString(const char * aString)42 Error Address::FromString(const char *aString)
43 {
44 constexpr char kSeperatorChar = '.';
45 constexpr char kNullChar = '\0';
46
47 Error error = kErrorParse;
48
49 for (uint8_t index = 0;; index++)
50 {
51 uint16_t value = 0;
52 uint8_t hasFirstDigit = false;
53
54 for (char digitChar = *aString;; ++aString, digitChar = *aString)
55 {
56 if ((digitChar < '0') || (digitChar > '9'))
57 {
58 break;
59 }
60
61 value = static_cast<uint16_t>((value * 10) + static_cast<uint8_t>(digitChar - '0'));
62 VerifyOrExit(value <= NumericLimits<uint8_t>::kMax);
63 hasFirstDigit = true;
64 }
65
66 VerifyOrExit(hasFirstDigit);
67
68 mBytes[index] = static_cast<uint8_t>(value);
69
70 if (index == sizeof(Address) - 1)
71 {
72 break;
73 }
74
75 VerifyOrExit(*aString == kSeperatorChar);
76 aString++;
77 }
78
79 VerifyOrExit(*aString == kNullChar);
80 error = kErrorNone;
81
82 exit:
83 return error;
84 }
85
ToString(void) const86 Address::InfoString Address::ToString(void) const
87 {
88 InfoString string;
89
90 string.Append("%d.%d.%d.%d", mBytes[0], mBytes[1], mBytes[2], mBytes[3]);
91
92 return string;
93 }
94
95 } // namespace Ip4
96 } // namespace ot
97
