dns: implement GetHostByName redirection (backend TODO)

libraries/libstratosphere/source/socket/impl/socket_api.os.horizon.cpp

@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2018-2020 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <stratosphere.hpp>
+#include "socket_api.hpp"
+#include "socket_allocator.hpp"
+
+namespace ams::socket::impl {
+
+    void *Alloc(size_t size) {
+        /* TODO: expheap, heap generation. */
+        return ams::Malloc(size);
+    }
+
+    void *Calloc(size_t num, size_t size) {
+        if (void *ptr = Alloc(size * num); ptr != nullptr) {
+            std::memset(ptr, 0, size * num);
+            return ptr;
+        } else {
+            return nullptr;
+        }
+    }
+
+    void Free(void *ptr) {
+        /* TODO: expheap, heap generation. */
+        return ams::Free(ptr);
+    }
+
+    u32 InetHtonl(u32 host) {
+        if constexpr (util::IsBigEndian()) {
+            return host;
+        } else {
+            return util::SwapBytes(host);
+        }
+    }
+
+    u16 InetHtons(u16 host) {
+        if constexpr (util::IsBigEndian()) {
+            return host;
+        } else {
+            return util::SwapBytes(host);
+        }
+    }
+
+    u32 InetNtohl(u32 net) {
+        if constexpr (util::IsBigEndian()) {
+            return net;
+        } else {
+            return util::SwapBytes(net);
+        }
+    }
+
+    u16 InetNtohs(u16 net) {
+        if constexpr (util::IsBigEndian()) {
+            return net;
+        } else {
+            return util::SwapBytes(net);
+        }
+    }
+
+}