Implement provider::Wifi::GetConnectedSsid()

am: 20f03a2966

* commit '20f03a2966652cf76ea2e7449cebaedb6b457acc':
  Implement provider::Wifi::GetConnectedSsid()

2 files changed, 23 insertions, 0 deletions

diff --git a/buffet/shill_client.cc b/buffet/shill_client.cc
index 5649762..8e6e1e9 100644
--- a/buffet/shill_client.cc
+++ b/buffet/shill_client.cc
@@ -18,6 +18,7 @@
 
 #include <base/message_loop/message_loop.h>
 #include <base/stl_util.h>
+#include <base/strings/string_number_conversions.h>
 #include <brillo/any.h>
 #include <brillo/errors/error.h>
 #include <brillo/variant_dictionary.h>
@@ -215,6 +216,27 @@ void ShillClient::StopAccessPoint() {
   ap_manager_client_->Stop();
 }
 
+std::string ShillClient::GetConnectedSsid() const {
+  for (const auto& kv : devices_) {
+    VariantDictionary properties;
+    if (!kv.second.selected_service->GetProperties(&properties, nullptr))
+      continue;
+
+    auto property_it = properties.find(shill::kWifiHexSsid);
+    if (property_it == properties.end()) continue;
+
+    string ssid_hex = property_it->second.TryGet<string>();
+    if (ssid_hex.empty()) continue;
+
+    std::vector<uint8_t> data;
+    if (!base::HexStringToBytes(ssid_hex, &data) || data.empty()) continue;
+
+    return std::string(data.begin(), data.end());
+  }
+
+  return "";
+}
+
 void ShillClient::AddConnectionChangedCallback(
     const ConnectionChangedCallback& listener) {
   connectivity_listeners_.push_back(listener);
diff --git a/buffet/shill_client.h b/buffet/shill_client.h
index 517cd91..63cdd98 100644
--- a/buffet/shill_client.h
+++ b/buffet/shill_client.h
@@ -58,6 +58,7 @@ class ShillClient final : public weave::provider::Network,
   void StopAccessPoint() override;
   bool IsWifi24Supported() const override { return is_24_supported_; }
   bool IsWifi50Supported() const override { return is_50_supported_; }
+  std::string GetConnectedSsid() const;
 
  private:
   struct DeviceState {