]>
Commit | Line | Data |
---|---|---|
ff73f02b | 1 | /* |
12471842 PL |
2 | * This file is part of PowerDNS or dnsdist. |
3 | * Copyright -- PowerDNS.COM B.V. and its contributors | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of version 2 of the GNU General Public License as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * In addition, for the avoidance of any doubt, permission is granted to | |
10 | * link this program with OpenSSL and to (re)distribute the binaries | |
11 | * produced as the result of such linking. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
21 | */ | |
e8c59f2d | 22 | #pragma once |
ff73f02b | 23 | #include "namespaces.hh" |
37063755 | 24 | #include "iputils.hh" |
ff73f02b RG |
25 | |
26 | struct EDNSCookiesOpt | |
27 | { | |
5a93bcbb PL |
28 | static const size_t EDNSCookieSecretSize = 32; |
29 | static const size_t EDNSCookieOptSize = 24; | |
30 | ||
37063755 PL |
31 | EDNSCookiesOpt(){}; |
32 | EDNSCookiesOpt(const std::string& option); | |
33 | EDNSCookiesOpt(const char* option, unsigned int len); | |
34 | ||
35 | bool makeFromString(const std::string& option); | |
36 | bool makeFromString(const char* option, unsigned int len); | |
37 | ||
38 | size_t size() const | |
39 | { | |
40 | return server.size() + client.size(); | |
41 | } | |
42 | ||
43 | bool isWellFormed() const | |
44 | { | |
45 | // RFC7873 section 5.2.2 | |
46 | // In summary, valid cookie lengths are 8 and 16 to 40 inclusive. | |
47 | return ( | |
48 | client.size() == 8 && (server.size() == 0 || (server.size() >= 8 && server.size() <= 32))); | |
49 | } | |
50 | ||
38118dcb | 51 | bool isValid(const string& secret, const ComboAddress& source) const; |
37063755 PL |
52 | bool makeServerCookie(const string& secret, const ComboAddress& source); |
53 | string makeOptString() const; | |
54 | string getServer() const | |
55 | { | |
56 | return server; | |
57 | } | |
58 | string getClient() const | |
59 | { | |
60 | return client; | |
61 | } | |
62 | ||
63 | private: | |
38118dcb | 64 | bool shouldRefresh() const; |
37063755 PL |
65 | |
66 | // the client cookie | |
ff73f02b | 67 | string client; |
37063755 | 68 | // the server cookie |
ff73f02b | 69 | string server; |
ff73f02b | 70 | |
37063755 PL |
71 | void getEDNSCookiesOptFromString(const char* option, unsigned int len); |
72 | }; |