1 /*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "android-base/parsenetaddress.h"
18
19 #include <algorithm>
20
21 #include "android-base/stringprintf.h"
22 #include "android-base/strings.h"
23
24 namespace android {
25 namespace base {
26
ParseNetAddress(const std::string & address,std::string * host,int * port,std::string * canonical_address,std::string * error)27 bool ParseNetAddress(const std::string& address, std::string* host, int* port,
28 std::string* canonical_address, std::string* error) {
29 host->clear();
30
31 bool ipv6 = true;
32 bool saw_port = false;
33 size_t colons = std::count(address.begin(), address.end(), ':');
34 size_t dots = std::count(address.begin(), address.end(), '.');
35 std::string port_str;
36 if (address[0] == '[') {
37 // [::1]:123
38 if (address.rfind("]:") == std::string::npos) {
39 *error = StringPrintf("bad IPv6 address '%s'", address.c_str());
40 return false;
41 }
42 *host = address.substr(1, (address.find("]:") - 1));
43 port_str = address.substr(address.rfind("]:") + 2);
44 saw_port = true;
45 } else if (dots == 0 && colons >= 2 && colons <= 7) {
46 // ::1
47 *host = address;
48 } else if (colons <= 1) {
49 // 1.2.3.4 or some.accidental.domain.com
50 ipv6 = false;
51 std::vector<std::string> pieces = Split(address, ":");
52 *host = pieces[0];
53 if (pieces.size() > 1) {
54 port_str = pieces[1];
55 saw_port = true;
56 }
57 }
58
59 if (host->empty()) {
60 *error = StringPrintf("no host in '%s'", address.c_str());
61 return false;
62 }
63
64 if (saw_port) {
65 if (sscanf(port_str.c_str(), "%d", port) != 1 || *port <= 0 ||
66 *port > 65535) {
67 *error = StringPrintf("bad port number '%s' in '%s'", port_str.c_str(),
68 address.c_str());
69 return false;
70 }
71 }
72
73 if (canonical_address != nullptr) {
74 *canonical_address =
75 StringPrintf(ipv6 ? "[%s]:%d" : "%s:%d", host->c_str(), *port);
76 }
77
78 return true;
79 }
80
81 } // namespace base
82 } // namespace android
83