WIP: wifi direct support. merged from upstream

internal/platform/implementation/linux/wifi_direct_utils.cc

@@ -0,0 +1,65 @@
+// Copyright 2026 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "internal/platform/implementation/linux/wifi_direct_utils.h"
+
+#include <cstdint>
+#include <optional>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "absl/strings/match.h"
+
+namespace nearby::linux::wifi_direct_internal {
+namespace {
+
+constexpr std::uint32_t kWpsMethodPushButton = 0x4;
+
+}  // namespace
+
+std::optional<PeerInfo> SelectPeerByName(const std::vector<PeerInfo>& peers,
+                                         absl::string_view device_name) {
+  std::optional<PeerInfo> selected;
+  for (const PeerInfo& peer : peers) {
+    if (peer.hardware_address.empty() ||
+        !absl::EqualsIgnoreCase(peer.name, device_name)) {
+      continue;
+    }
+    if (!selected.has_value() || peer.strength > selected->strength ||
+        (peer.strength == selected->strength &&
+         peer.last_seen > selected->last_seen)) {
+      selected = peer;
+    }
+  }
+  return selected;
+}
+
+ConnectionSettings BuildGcConnectionSettings(absl::string_view uuid,
+                                             absl::string_view peer_address) {
+  return {
+      {"connection",
+       {{"uuid", sdbus::Variant(std::string(uuid))},
+        {"id", sdbus::Variant(std::string("Nearby Wi-Fi Direct"))},
+        {"type", sdbus::Variant(std::string("wifi-p2p"))},
+        {"autoconnect", sdbus::Variant(false)}}},
+      {"wifi-p2p",
+       {{"peer", sdbus::Variant(std::string(peer_address))},
+        {"wps-method", sdbus::Variant(kWpsMethodPushButton)}}},
+      {"ipv4", {{"method", sdbus::Variant(std::string("auto"))}}},
+      {"ipv6", {{"method", sdbus::Variant(std::string("disabled"))}}},
+  };
+}
+
+}  // namespace nearby::linux::wifi_direct_internal