1 #pragma once 2 #include "dbus_singleton.hpp" 3 #include "logging.hpp" 4 5 #include <boost/asio/ip/address.hpp> 6 #include <boost/asio/ip/basic_endpoint.hpp> 7 #include <boost/asio/ip/tcp.hpp> 8 #include <sdbusplus/message.hpp> 9 10 #include <charconv> 11 #include <iostream> 12 #include <memory> 13 14 namespace async_resolve 15 { 16 17 inline bool endpointFromResolveTuple(const std::vector<uint8_t>& ipAddress, 18 boost::asio::ip::tcp::endpoint& endpoint) 19 { 20 if (ipAddress.size() == 4) // ipv4 address 21 { 22 BMCWEB_LOG_DEBUG("ipv4 address"); 23 boost::asio::ip::address_v4 ipv4Addr( 24 {ipAddress[0], ipAddress[1], ipAddress[2], ipAddress[3]}); 25 endpoint.address(ipv4Addr); 26 } 27 else if (ipAddress.size() == 16) // ipv6 address 28 { 29 BMCWEB_LOG_DEBUG("ipv6 address"); 30 boost::asio::ip::address_v6 ipv6Addr( 31 {ipAddress[0], ipAddress[1], ipAddress[2], ipAddress[3], 32 ipAddress[4], ipAddress[5], ipAddress[6], ipAddress[7], 33 ipAddress[8], ipAddress[9], ipAddress[10], ipAddress[11], 34 ipAddress[12], ipAddress[13], ipAddress[14], ipAddress[15]}); 35 endpoint.address(ipv6Addr); 36 } 37 else 38 { 39 BMCWEB_LOG_ERROR("Resolve failed to fetch the IP address"); 40 return false; 41 } 42 return true; 43 } 44 45 class Resolver 46 { 47 public: 48 // unused io param used to keep interface identical to 49 // boost::asio::tcp:::resolver 50 explicit Resolver(boost::asio::io_context& /*io*/) {} 51 52 ~Resolver() = default; 53 54 Resolver(const Resolver&) = delete; 55 Resolver(Resolver&&) = delete; 56 Resolver& operator=(const Resolver&) = delete; 57 Resolver& operator=(Resolver&&) = delete; 58 59 using results_type = std::vector<boost::asio::ip::tcp::endpoint>; 60 61 template <typename ResolveHandler> 62 // This function is kept using snake case so that it is interoperable with 63 // boost::asio::ip::tcp::resolver 64 // NOLINTNEXTLINE(readability-identifier-naming) 65 void async_resolve(std::string_view host, std::string_view port, 66 ResolveHandler&& handler) 67 { 68 BMCWEB_LOG_DEBUG("Trying to resolve: {}:{}", host, port); 69 70 uint16_t portNum = 0; 71 72 auto it = std::from_chars(&*port.begin(), &*port.end(), portNum); 73 if (it.ec != std::errc()) 74 { 75 BMCWEB_LOG_ERROR("Failed to get the Port"); 76 handler(std::make_error_code(std::errc::invalid_argument), 77 results_type{}); 78 79 return; 80 } 81 82 uint64_t flag = 0; 83 crow::connections::systemBus->async_method_call( 84 [host{std::string(host)}, portNum, 85 handler = std::forward<ResolveHandler>(handler)]( 86 const boost::system::error_code& ec, 87 const std::vector< 88 std::tuple<int32_t, int32_t, std::vector<uint8_t>>>& resp, 89 const std::string& hostName, const uint64_t flagNum) { 90 results_type endpointList; 91 if (ec) 92 { 93 BMCWEB_LOG_ERROR("Resolve failed: {}", ec.message()); 94 handler(ec, endpointList); 95 return; 96 } 97 BMCWEB_LOG_DEBUG("ResolveHostname returned: {}:{}", hostName, 98 flagNum); 99 // Extract the IP address from the response 100 for (const std::tuple<int32_t, int32_t, std::vector<uint8_t>>& 101 resolveList : resp) 102 { 103 boost::asio::ip::tcp::endpoint endpoint; 104 endpoint.port(portNum); 105 if (!endpointFromResolveTuple(std::get<2>(resolveList), 106 endpoint)) 107 { 108 boost::system::error_code ecErr = make_error_code( 109 boost::system::errc::address_not_available); 110 handler(ecErr, endpointList); 111 } 112 BMCWEB_LOG_DEBUG("resolved endpoint is : {}", 113 endpoint.address().to_string()); 114 endpointList.push_back(endpoint); 115 } 116 // All the resolved data is filled in the endpointList 117 handler(ec, endpointList); 118 }, 119 "org.freedesktop.resolve1", "/org/freedesktop/resolve1", 120 "org.freedesktop.resolve1.Manager", "ResolveHostname", 0, host, 121 AF_UNSPEC, flag); 122 } 123 }; 124 125 } // namespace async_resolve 126