#3 - DNS support + IPv6

modules/network/include/Address.hpp

@@ -1,5 +1,7 @@
 #pragma once
 
+#include "io/HostResolver.hpp"
+
 #include <arpa/inet.h>
 #include <spdlog/spdlog.h>
 #include <string>
@@ -7,6 +9,7 @@
 #include <optional>
 #include <sys/socket.h>
 #include <format>
+#include <tl/expected.hpp>
 
 namespace tw::net {
 
@@ -38,6 +41,24 @@ public:
         : m_storage(storage)
     { }
 
+    /**
+     * Look a host up, accepting a name where the constructor above takes only
+     * an address literal.
+     *
+     * `family` should be the family of the socket the address will be used
+     * with. The default suits an address that is only being validated or
+     * displayed, and takes whatever the name resolves to.
+     */
+    static tl::expected<Address, ResolutionError>
+    resolve(const std::string& host, int port, sa_family_t family = AF_UNSPEC) {
+        auto storage_r = resolve_host(host, port, family);
+        if(!storage_r) {
+            return tl::make_unexpected(storage_r.error());
+        }
+
+        return Address(std::move(storage_r.value()));
+    }
+
     /** Return a const pointer suitable for connect / sendto / bind. */
     const struct sockaddr* sockaddr() const {
         return reinterpret_cast<const struct sockaddr*>(&m_storage);