1 /******************************************************************************
2  *
3  *  Copyright 2017 The Android Open Source Project
4  *
5  *  Licensed under the Apache License, Version 2.0 (the "License");
6  *  you may not use this file except in compliance with the License.
7  *  You may obtain a copy of the License at:
8  *
9  *  http://www.apache.org/licenses/LICENSE-2.0
10  *
11  *  Unless required by applicable law or agreed to in writing, software
12  *  distributed under the License is distributed on an "AS IS" BASIS,
13  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  *  See the License for the specific language governing permissions and
15  *  limitations under the License.
16  *
17  ******************************************************************************/
18 
19 #include "raw_address.h"
20 
21 #include <base/strings/string_split.h>
22 #include <base/strings/stringprintf.h>
23 #include <stdint.h>
24 #include <algorithm>
25 #include <vector>
26 
27 static_assert(sizeof(RawAddress) == 6, "RawAddress must be 6 bytes long!");
28 
29 const RawAddress RawAddress::kAny{{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}};
30 const RawAddress RawAddress::kEmpty{{0x00, 0x00, 0x00, 0x00, 0x00, 0x00}};
31 
32 RawAddress::RawAddress(const uint8_t (&addr)[6]) {
33   std::copy(addr, addr + kLength, address);
34 };
35 
36 std::string RawAddress::ToString() const {
37   return base::StringPrintf("%02x:%02x:%02x:%02x:%02x:%02x", address[0],
38                             address[1], address[2], address[3], address[4],
39                             address[5]);
40 }
41 
42 bool RawAddress::FromString(const std::string& from, RawAddress& to) {
43   RawAddress new_addr;
44   if (from.length() != 17) return false;
45 
46   std::vector<std::string> byte_tokens =
47       base::SplitString(from, ":", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
48 
49   if (byte_tokens.size() != 6) return false;
50 
51   for (int i = 0; i < 6; i++) {
52     const auto& token = byte_tokens[i];
53 
54     if (token.length() != 2) return false;
55 
56     char* temp = nullptr;
57     new_addr.address[i] = strtol(token.c_str(), &temp, 16);
58     if (*temp != '\0') return false;
59   }
60 
61   to = new_addr;
62   return true;
63 }
64 
65 size_t RawAddress::FromOctets(const uint8_t* from) {
66   std::copy(from, from + kLength, address);
67   return kLength;
68 };
69 
70 bool RawAddress::IsValidAddress(const std::string& address) {
71   RawAddress tmp;
72   return RawAddress::FromString(address, tmp);
73 }
74