| /* |
| * nghttp2 - HTTP/2 C Library |
| * |
| * Copyright (c) 2016 Tatsuhiro Tsujikawa |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining |
| * a copy of this software and associated documentation files (the |
| * "Software"), to deal in the Software without restriction, including |
| * without limitation the rights to use, copy, modify, merge, publish, |
| * distribute, sublicense, and/or sell copies of the Software, and to |
| * permit persons to whom the Software is furnished to do so, subject to |
| * the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be |
| * included in all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE |
| * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION |
| * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
| * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| */ |
| #ifndef SHRPX_DUAL_DNS_RESOLVER_H |
| #define SHRPX_DUAL_DNS_RESOLVER_H |
| |
| #include "shrpx.h" |
| |
| #include <ev.h> |
| |
| #include "shrpx_dns_resolver.h" |
| |
| using namespace nghttp2; |
| |
| namespace shrpx { |
| |
| // DualDNSResolver performs name resolution for both A and AAAA |
| // records at the same time. The first successful return (or if we |
| // have both successful results, prefer to AAAA) is chosen. This is |
| // wrapper around 2 DNSResolver inside. resolve(), get_status(), and |
| // how CompleteCb is called have the same semantics with DNSResolver. |
| class DualDNSResolver { |
| public: |
| DualDNSResolver(struct ev_loop *loop); |
| |
| // Resolves |host|. |host| must be NULL-terminated string. |
| int resolve(const StringRef &host); |
| CompleteCb get_complete_cb() const; |
| void set_complete_cb(CompleteCb cb); |
| int get_status(Address *result) const; |
| |
| private: |
| // For A record |
| DNSResolver resolv4_; |
| // For AAAA record |
| DNSResolver resolv6_; |
| CompleteCb complete_cb_; |
| }; |
| |
| } // namespace shrpx |
| |
| #endif // SHRPX_DUAL_DNS_RESOLVER_H |