1 /******************************************************************************
2  *
3  *  Copyright 2019 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 "hci/address.h"
20 
21 #include <stdint.h>
22 #include <algorithm>
23 #include <sstream>
24 #include <vector>
25 
26 #include "os/log.h"
27 
28 namespace bluetooth {
29 namespace hci {
30 
31 static_assert(sizeof(Address) == 6, "Address must be 6 bytes long!");
32 
33 const Address Address::kAny{{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}};
34 const Address Address::kEmpty{{0x00, 0x00, 0x00, 0x00, 0x00, 0x00}};
35 
36 Address::Address(const uint8_t (&addr)[6]) {
37   std::copy(addr, addr + kLength, address);
38 };
39 
40 std::string Address::ToString() const {
41   char buffer[] = "00:00:00:00:00:00";
42   std::snprintf(&buffer[0], sizeof(buffer), "%02x:%02x:%02x:%02x:%02x:%02x", address[5], address[4], address[3],
43                 address[2], address[1], address[0]);
44   std::string str(buffer);
45   return str;
46 }
47 
48 bool Address::FromString(const std::string& from, Address& to) {
49   Address new_addr;
50   if (from.length() != 17) {
51     return false;
52   }
53 
54   std::istringstream stream(from);
55   std::string token;
56   int index = 0;
57   while (getline(stream, token, ':')) {
58     if (index >= 6) {
59       return false;
60     }
61 
62     if (token.length() != 2) {
63       return false;
64     }
65 
66     char* temp = nullptr;
67     new_addr.address[5 - index] = strtol(token.c_str(), &temp, 16);
68     if (*temp != '\0') {
69       return false;
70     }
71 
72     index++;
73   }
74 
75   if (index != 6) {
76     return false;
77   }
78 
79   to = new_addr;
80   return true;
81 }
82 
83 size_t Address::FromOctets(const uint8_t* from) {
84   std::copy(from, from + kLength, address);
85   return kLength;
86 };
87 
88 bool Address::IsValidAddress(const std::string& address) {
89   Address tmp;
90   return Address::FromString(address, tmp);
91 }
92 
93 }  // namespace hci
94 }  // namespace bluetooth
95