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/*
* 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,
/** reply message for DUMP and LOOKUP */
LOOKIP_ENTRY,
/** reply message for LOOKUP if no such IP found */
LOOKIP_NOT_FOUND,
/** register for notifications about new virtual IPs */
LOOKIP_REGISTER_UP,
/** register for notifications about virtual IPs released */
LOOKIP_REGISTER_DOWN,
/** notify reply message for REGISTER_UP */
LOOKIP_NOTIFY_UP,
/** notify reply message for REGISTER_DOWN */
LOOKIP_NOTIFY_DOWN,
/** end of request batch */
LOOKIP_END,
};
/**
* 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];
} __attribute__((packed));
/**
* Response message sent to client.
*
* Valid response message types are ENTRY, NOT_FOUND and NOTIFY_UP/DOWN.
*
* All fields are set in all messages, except in NOT_FOUND: Only vip is set.
*/
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[256];
/** null terminated connection name */
char name[40];
/** unique connection id */
unsigned int unique_id;
} __attribute__((packed));
#endif /** LOOKIP_MSG_H_ @}*/
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