From 6525baae022ea244e567e52487bd7a78984ff6a5 Mon Sep 17 00:00:00 2001
From: Jakub Sławiński
Date: Mon, 31 May 2004 22:05:30 +0200
Subject: v0.5.4

	- Fixed: default password incompatibilities
	- Modified: Server listening behaviour
	- Added: Module support for client's packet filtering
	- Modified: client behaviour after unsuccessful connection
	- Fixed: printing ipv6 addresses
	- Added: IP protocol family strict choice: 'ipv4' and 'ipv6'
	- Added: flow control / packet buffering
	- Fixed: signal handling
	- Fixed: client freeze in udp reverse mode with zlib enabled
---
 exmodule.c | 66 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 exmodule.c

(limited to 'exmodule.c')

diff --git a/exmodule.c b/exmodule.c
new file mode 100644
index 0000000..133609c
--- /dev/null
+++ b/exmodule.c
@@ -0,0 +1,66 @@
+/*
+ * active port forwarder - software for secure forwarding
+ * Copyright (C) 2003,2004 jeremian <jeremian [at] poczta.fm>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ */
+
+/* This example module put IP of the connected user into a body of the message */
+#include <string.h>
+/* There is no required headers for module to work.
+ * We just need string.h for memcpy and strlen functions.
+ */
+
+/* info
+ * return values:
+ * info about module
+ */
+
+char*
+info(void)
+{
+	return "An example module";
+}
+
+/* allow
+ * return values:
+ * 0 - allow to connect
+ * !=0 - drop the connection
+ */
+
+int
+allow(char* host, char* port)
+{
+	return 0; /* allow to connect */
+}
+
+/* filter
+ * return values:
+ * 0 - allow to transfer
+ * 1 - drop the packet
+ * 2 - drop the connection
+ */
+
+int
+filter(char* host, unsigned char* message, int* length)
+{
+	int n;
+	n = strlen(host);
+	message[*length] = '|';
+	memcpy(&message[*length+1], host, n);
+	*length += n+1;
+	return 0; /* allow to transfer */
+}
-- 
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