src/: add rda_protocol.{c,h} for generic remote protocol support.

2 files changed, 261 insertions, 0 deletions

diff --git a/src/rda_protocol.c b/src/rda_protocol.c
new file mode 100644
index 0000000..91a0f2c
--- /dev/null
+++ b/src/rda_protocol.c
@@ -0,0 +1,203 @@
+/* -*- Mode: C; c-set-style: linux indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
+
+/* rda_protocol.c - Generic protocol support for remote sessions
+
+   Copyright (C) 2023 Mihai Moldovan <ionic@ionic.de>
+   All rights reserved.
+
+   The RDA Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The RDA Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the Mate Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+   Boston, MA 02110-1301, USA.
+ */
+
+#include <glib.h>
+#include <glib/gi18n.h>
+
+#include <rda_protocol.h>
+#include <rda.h>
+#include <rda_x2go.h>
+#include <rda_ogon.h>
+
+static guint supported_protos[RDA_PROTOCOL_MAX] = { };
+static gboolean supported_protos_init = FALSE;
+
+rda_protocol_t
+rda_protocol = RDA_PROTOCOL_MAX;
+
+guint
+rda_get_protocol(void)
+{
+	if (RDA_PROTOCOL_MAX == rda_protocol)
+	{
+		rda_init();
+	}
+
+	return rda_protocol;
+}
+
+static const gchar*
+rda_protocol_name_nx(void)
+{
+	return _("NX");
+}
+
+static const gchar*
+rda_protocol_name_kdrive(void)
+{
+	return _("KDrive");
+}
+
+static const gchar*
+rda_protocol_name_rdp(void)
+{
+	return _("RDP");
+}
+
+static const gchar*
+rda_protocol_name_vnc(void)
+{
+	return _("VNC");
+}
+
+gchar*
+rda_get_protocol_name (void)
+{
+	if (RDA_PROTOCOL_MAX == rda_protocol)
+		rda_init();
+
+	gchar* rda_protocol_name;
+
+	switch(rda_protocol) {
+
+		case RDA_PROTOCOL_NONE:
+			rda_protocol_name = g_strdup(_("local"));
+			break;
+
+		case RDA_PROTOCOL_NX:
+			rda_protocol_name = g_strdup(rda_protocol_name_nx());
+			break;
+
+		case RDA_PROTOCOL_KDRIVE:
+			rda_protocol_name = g_strdup(rda_protocol_name_kdrive());
+			break;
+
+		case RDA_PROTOCOL_RDP:
+			rda_protocol_name = g_strdup(rda_protocol_name_rdp());
+			break;
+
+		case RDA_PROTOCOL_VNC:
+			rda_protocol_name = g_strdup(rda_protocol_name_vnc());
+			break;
+
+		case RDA_PROTOCOL_UNKNOWN:
+			rda_protocol_name = g_strdup(_("unknown"));
+
+		default:
+			rda_protocol_name = g_strdup("");
+
+	}
+
+	/*
+	 * Moving g_strdup() down here might sound tempting, but don't do
+	 * that.
+	 *
+	 * Even though, at the time of writing this comment, all functions
+	 * used in here actually return a string literal (and as such, a
+	 * "const gchar*"), this may not be true forever and it's too easy
+	 * to leak memory by copying an already heap-allocated string.
+	 */
+	return rda_protocol_name;
+}
+
+static void
+init_supported_protos(void)
+{
+	if (!(supported_protos_init))
+	{
+		/* Initialize the list. */
+#define merge_arr(name) \
+	do \
+	{ \
+		for (gsize i = 0; i < rda_supported_protocols_ ## name ## _len; ++i) \
+		{ \
+			supported_protos[rda_supported_protocols_ ## name [i]] = TRUE; \
+		} \
+	} \
+	while (0)
+
+#ifdef WITH_REMOTE_AWARENESS_X2GO
+		merge_arr(x2go);
+#endif
+
+#ifdef WITH_REMOTE_AWARENESS_OGON
+		merge_arr(ogon);
+#endif
+
+#undef merge_arr
+		supported_protos_init = TRUE;
+	}
+}
+
+GList*
+rda_supported_protocols(void)
+{
+	GList *proto_list = NULL;
+
+	init_supported_protos();
+
+	for (gsize i = 0; i < RDA_PROTOCOL_MAX; ++i)
+	{
+		if (supported_protos[i])
+		{
+			proto_list = g_list_append (proto_list, GUINT_TO_POINTER(i));
+		}
+	}
+
+	return proto_list;
+}
+
+GList*
+rda_supported_protocols_by_name(void)
+{
+	GList *proto_list_by_name = NULL;
+
+	init_supported_protos();
+
+	for (gsize i = 0; i < RDA_PROTOCOL_MAX; ++i)
+	{
+		if (supported_protos[i])
+		{
+			switch (i)
+			{
+				case RDA_PROTOCOL_NX:
+					proto_list_by_name = g_list_append (proto_list_by_name, g_strdup(rda_protocol_name_nx()));
+					break;
+
+				case RDA_PROTOCOL_KDRIVE:
+					proto_list_by_name = g_list_append (proto_list_by_name, g_strdup(rda_protocol_name_kdrive()));
+					break;
+
+				case RDA_PROTOCOL_RDP:
+					proto_list_by_name = g_list_append (proto_list_by_name, g_strdup(rda_protocol_name_rdp()));
+					break;
+
+				case RDA_PROTOCOL_VNC:
+					proto_list_by_name = g_list_append (proto_list_by_name, g_strdup(rda_protocol_name_vnc()));
+					break;
+			}
+		}
+	}
+
+	return proto_list_by_name;
+}
diff --git a/src/rda_protocol.h b/src/rda_protocol.h
new file mode 100644
index 0000000..982b916
--- /dev/null
+++ b/src/rda_protocol.h
@@ -0,0 +1,58 @@
+/* -*- Mode: C; c-set-style: linux indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
+
+/* rda_protocol.h - Generic protocol support for remote sessions
+
+   Copyright (C) 2023 Mihai Moldovan <ionic@ionic.de>
+   All rights reserved.
+
+   The RDA Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The RDA Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the Mate Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+   Boston, MA  02110-1301, USA.
+ */
+
+#ifndef RDA_PROTOCOL_H
+#define RDA_PROTOCOL_H
+
+#include <glib.h>
+
+G_BEGIN_DECLS
+
+typedef enum {
+	RDA_PROTOCOL_UNKNOWN = 0,
+	RDA_PROTOCOL_NONE,
+	RDA_PROTOCOL_VNC,
+	RDA_PROTOCOL_RDP,
+	RDA_PROTOCOL_NX,
+	RDA_PROTOCOL_KDRIVE,
+	RDA_PROTOCOL_MAX,
+} rda_protocol_t;
+
+extern rda_protocol_t
+rda_protocol;
+
+guint
+rda_get_protocol(void);
+
+gchar*
+rda_get_protocol_name(void);
+
+GList*
+rda_supported_protocols(void);
+
+GList*
+rda_supported_protocols_by_name(void);
+
+G_END_DECLS
+
+#endif /* RDA_PROTOCOL_H */