94 lines
2.9 KiB
C++
94 lines
2.9 KiB
C++
/*
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* nghttp2 - HTTP/2 C Library
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*
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* Copyright (c) 2016 Tatsuhiro Tsujikawa
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "shrpx_dual_dns_resolver.h"
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namespace shrpx {
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DualDNSResolver::DualDNSResolver(struct ev_loop *loop, int family)
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: family_(family), resolv4_(loop), resolv6_(loop) {
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auto cb = [this](DNSResolverStatus, const Address *) {
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Address result;
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auto status = this->get_status(&result);
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switch (status) {
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case DNSResolverStatus::ERROR:
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case DNSResolverStatus::OK:
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break;
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default:
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return;
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}
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auto cb = this->get_complete_cb();
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cb(status, &result);
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};
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if (family_ == AF_UNSPEC || family_ == AF_INET) {
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resolv4_.set_complete_cb(cb);
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}
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if (family_ == AF_UNSPEC || family_ == AF_INET6) {
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resolv6_.set_complete_cb(cb);
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}
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}
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int DualDNSResolver::resolve(const StringRef &host) {
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int rv4 = 0, rv6 = 0;
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if (family_ == AF_UNSPEC || family_ == AF_INET) {
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rv4 = resolv4_.resolve(host, AF_INET);
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}
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if (family_ == AF_UNSPEC || family_ == AF_INET6) {
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rv6 = resolv6_.resolve(host, AF_INET6);
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}
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if (rv4 != 0 && rv6 != 0) {
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return -1;
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}
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return 0;
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}
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CompleteCb DualDNSResolver::get_complete_cb() const { return complete_cb_; }
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void DualDNSResolver::set_complete_cb(CompleteCb cb) { complete_cb_ = cb; }
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DNSResolverStatus DualDNSResolver::get_status(Address *result) const {
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auto rv6 = resolv6_.get_status(result);
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if (rv6 == DNSResolverStatus::OK) {
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return DNSResolverStatus::OK;
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}
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auto rv4 = resolv4_.get_status(result);
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if (rv4 == DNSResolverStatus::OK) {
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return DNSResolverStatus::OK;
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}
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if (rv4 == DNSResolverStatus::RUNNING || rv6 == DNSResolverStatus::RUNNING) {
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return DNSResolverStatus::RUNNING;
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}
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if (rv4 == DNSResolverStatus::ERROR || rv6 == DNSResolverStatus::ERROR) {
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return DNSResolverStatus::ERROR;
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}
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return DNSResolverStatus::IDLE;
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}
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} // namespace shrpx
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