2 * This file is part of PowerDNS or dnsdist.
3 * Copyright -- PowerDNS.COM B.V. and its contributors
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.
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.
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.
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.
22 #ifndef PDNS_EDNSOPTIONS_HH
23 #define PDNS_EDNSOPTIONS_HH
25 #include "namespaces.hh"
29 enum EDNSOptionCodeEnum {NSID=3, DAU=4, DHU=6, N3U=7, ECS=8, EXPIRE=9, COOKIE=10, TCPKEEPALIVE=11, PADDING=12, CHAIN=13};
32 /* extract a specific EDNS0 option from a pointer on the beginning rdLen of the OPT RR */
33 int getEDNSOption(char* optRR, size_t len, uint16_t wantedOption, char ** optionValue, size_t * optionValueSize);
37 const char* content{nullptr};
41 /* extract all EDNS0 options from a pointer on the beginning rdLen of the OPT RR */
42 int getEDNSOptions(const char* optRR, size_t len, std::map<uint16_t, EDNSOptionView>& options);
44 void generateEDNSOption(uint16_t optionCode, const std::string& payload, std::string& res);