feat: add plasma-face-unlock

src/daemon/client.h

@@ -0,0 +1,57 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
+// One connection to the daemon.
+//
+// The kernel says who is on the other end (SO_PEERCRED), and that is the only
+// thing any decision here is based on. Nothing a client writes about itself is
+// taken on trust.
+
+#pragma once
+
+#include <QJsonObject>
+#include <QLocalSocket>
+#include <QObject>
+
+#include <sys/types.h>
+
+class Client : public QObject
+{
+    Q_OBJECT
+public:
+    Client(QLocalSocket *socket, QObject *parent);
+    ~Client() override;
+
+    uid_t uid() const
+    {
+        return m_uid;
+    }
+    pid_t pid() const
+    {
+        return m_pid;
+    }
+    bool credentialsKnown() const
+    {
+        return m_known;
+    }
+
+    void send(const QJsonObject &message);
+    void close();
+
+    // What this connection is for, once it has said so. A connection makes
+    // one request; "watch", "verify" and "enroll" keep it open.
+    QString role;
+
+Q_SIGNALS:
+    void request(Client *client, const QJsonObject &message);
+    void disconnected(Client *client);
+
+private:
+    void readLines();
+
+    QLocalSocket *m_socket;
+    QByteArray m_buffer;
+    uid_t m_uid = uid_t(-1);
+    pid_t m_pid = 0;
+    bool m_known = false;
+    bool m_gone = false;
+};