Defined on-the-wire format used on lookip socket

src/libcharon/plugins/lookip/Makefile.am

@@ -2,6 +2,9 @@
 INCLUDES = -I$(top_srcdir)/src/libstrongswan -I$(top_srcdir)/src/libhydra \
 	-I$(top_srcdir)/src/libcharon
 
+AM_CFLAGS = -rdynamic \
+	-DIPSEC_PIDDIR=\"${piddir}\"
+
 if MONOLITHIC
 noinst_LTLIBRARIES = libstrongswan-lookip.la
 else
@@ -9,6 +12,6 @@ plugin_LTLIBRARIES = libstrongswan-lookip.la
 endif
 
 libstrongswan_lookip_la_SOURCES = lookip_plugin.h lookip_plugin.c \
-	lookip_listener.h lookip_listener.c
+	lookip_listener.h lookip_listener.c lookip_msg.h
 
 libstrongswan_lookip_la_LDFLAGS = -module -avoid-version

src/libcharon/plugins/lookip/lookip_msg.h

@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2012 Martin Willi
+ * Copyright (C) 2012 revosec AG
+ *
+ * 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.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * 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.
+ */
+
+/**
+ * @defgroup lookip_msg lookip_msg
+ * @{ @ingroup lookip
+ */
+
+#ifndef LOOKIP_MSG_H_
+#define LOOKIP_MSG_H_
+
+#define LOOKIP_SOCKET IPSEC_PIDDIR "/charon.lkp"
+
+typedef struct lookip_request_t lookip_request_t;
+typedef struct lookip_response_t lookip_response_t;
+
+/**
+ * Message type.
+ *
+ * The client can send a batch of request messages, containing DUMP, LOOKUP or
+ * REGISTER_* messages. The server immediately starts sending responses for
+ * these messages, using ENTRY or NOTIFY_* messages.
+ * A client MUST send an END message to complete a batch. The server will
+ * send any remaining responses, but will not accept new requests and closes
+ * the connection when complete.
+ */
+enum {
+	/** request a dump of all entries */
+	LOOKIP_DUMP = 1,
+	/** lookup a specific virtual IP */
+	LOOKIP_LOOKUP = 2,
+	/** reply message for DUMP and LOOKUP */
+	LOOKIP_ENTRY = 3,
+	/** register for notifications about new virtual IPs */
+	LOOKIP_REGISTER_UP = 4,
+	/** register for notifications about virtual IPs released */
+	LOOKIP_REGISTER_DOWN = 5,
+	/** notify reply message for REGISTER_UP */
+	LOOKIP_NOTIFY_UP = 6,
+	/** notify reply message for REGISTER_DOWN */
+	LOOKIP_NOTIFY_DOWN = 7,
+	/** end of request batch */
+	LOOKIP_END = 8,
+};
+
+/**
+ * Request message sent from client.
+ *
+ * Valid request message types are DUMP, LOOKUP, REGISTER_UP/DOWN and END.
+ *
+ * The vip field is used only in LOOKUP requests, but ignored otherwise.
+ */
+struct lookip_request_t {
+	/** request message type */
+	int type;
+	/** null terminated string representation of virtual IP */
+	char vip[40];
+};
+
+/**
+ * Response message sent to client.
+ *
+ * Valid response message types are ENTRY and NOTIFY_UP/DOWN.
+ */
+struct lookip_response_t {
+	/** response message type */
+	int type;
+	/** null terminated string representation of virtual IP */
+	char vip[40];
+	/** null terminated string representation of outer IP */
+	char ip[40];
+	/** null terminated peer identity */
+	char id[128];
+	/** null connection name */
+	char name[44];
+};
+
+#endif /** LOOKIP_MSG_H_ @}*/