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/*
 * Copyright (C) 2015 Tobias Brunner
 * Copyright (C) 2006 Martin Willi
 * Hochschule fuer Technik Rapperswil
 *
 * 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.
 */

#ifndef STROKE_MSG_H_
#define STROKE_MSG_H_

#include <sys/types.h>

#include <library.h>

/**
 * Socket which is used to communicate between charon and stroke
 */
#define STROKE_SOCKET IPSEC_PIDDIR "/charon.ctl"

/**
 * Number of bytes by which the buffer is increased as needed
 */
#define STROKE_BUF_LEN_INC     1024

typedef enum list_flag_t list_flag_t;

/**
 * Definition of the LIST flags, used for
 * the various stroke list* commands.
 */
enum list_flag_t {
	/** don't list anything */
	LIST_NONE =			0x0000,
	/** list all raw public keys */
	LIST_PUBKEYS =		0x0001,
	/** list all host/user certs */
	LIST_CERTS =		0x0002,
	/** list all ca certs */
	LIST_CACERTS =		0x0004,
	/** list all ocsp signer certs */
	LIST_OCSPCERTS =	0x0008,
	/** list all aa certs */
	LIST_AACERTS =		0x0010,
	/** list all attribute certs */
	LIST_ACERTS =		0x0020,
	/** list all access control groups */
	LIST_GROUPS =		0x0040,
	/** list all ca information records */
	LIST_CAINFOS =		0x0080,
	/** list all crls */
	LIST_CRLS =			0x0100,
	/** list all ocsp cache entries */
	LIST_OCSP =			0x0200,
	/** list all supported algorithms */
	LIST_ALGS =			0x0400,
	/** list plugin information */
	LIST_PLUGINS =		0x0800,
	/** all list options */
	LIST_ALL =			0x0FFF,
};

typedef enum reread_flag_t reread_flag_t;

/**
 * Definition of the REREAD flags, used for
 * the various stroke reread* commands.
 */
enum reread_flag_t {
	/** don't reread anything */
	REREAD_NONE =		0x0000,
	/** reread all secret keys */
	REREAD_SECRETS =	0x0001,
	/** reread all ca certs */
	REREAD_CACERTS =	0x0002,
	/** reread all ocsp signer certs */
	REREAD_OCSPCERTS =	0x0004,
	/** reread all aa certs */
	REREAD_AACERTS =	0x0008,
	/** reread all attribute certs */
	REREAD_ACERTS =		0x0010,
	/** reread all crls */
	REREAD_CRLS =		0x0020,
	/** all reread options */
	REREAD_ALL =		0x003F,
};

typedef enum purge_flag_t purge_flag_t;

/**
 * Definition of the PURGE flags, currently used for
 * the stroke purgeocsp command.
 */
enum purge_flag_t {
	/** don't purge anything */
	PURGE_NONE =		0x0000,
	/** purge ocsp cache entries */
	PURGE_OCSP =		0x0001,
	/** purge CRL cache entries */
	PURGE_CRLS =		0x0002,
	/** purge X509 cache entries */
	PURGE_CERTS =		0x0004,
	/** purge IKE_SAs without a CHILD_SA */
	PURGE_IKE =			0x0008,
};

typedef enum export_flag_t export_flag_t;

/**
 * Definition of the export flags
 */
enum export_flag_t {
	/** export an X509 certificate */
	EXPORT_X509 =		0x0001,
	/** export an X509 end entity certificate for a connection */
	EXPORT_CONN_CERT =	0x0002,
	/** export the complete trust chain of a connection */
	EXPORT_CONN_CHAIN =	0x0004,
};

/**
 * CRL certificate validation policy
 */
typedef enum {
	CRL_STRICT_NO,
	CRL_STRICT_YES,
	CRL_STRICT_IFURI,
} crl_policy_t;


typedef struct stroke_end_t stroke_end_t;

/**
 * definition of a peer in a stroke message
 */
struct stroke_end_t {
	char *auth;
	char *auth2;
	char *id;
	char *id2;
	char *eap_id;
	char *rsakey;
	char *cert;
	char *cert2;
	char *ca;
	char *ca2;
	char *groups;
	char *groups2;
	char *cert_policy;
	char *updown;
	char *address;
	u_int16_t ikeport;
	char *sourceip;
	char *dns;
	char *subnets;
	int sendcert;
	int hostaccess;
	int tohost;
	int allow_any;
	u_int8_t protocol;
	u_int16_t from_port;
	u_int16_t to_port;
};

typedef struct stroke_msg_t stroke_msg_t;

/**
 * @brief A stroke message sent over the unix socket.
 */
struct stroke_msg_t {
	/* length of this message with all strings */
	u_int16_t length;

	/* type of the message */
	enum {
		/* initiate a connection */
		STR_INITIATE,
		/* install SPD entries for a policy */
		STR_ROUTE,
		/* uninstall SPD entries for a policy */
		STR_UNROUTE,
		/* add a connection */
		STR_ADD_CONN,
		/* delete a connection */
		STR_DEL_CONN,
		/* terminate connection */
		STR_TERMINATE,
		/* terminate connection by peers srcip/virtual ip */
		STR_TERMINATE_SRCIP,
		/* rekey a connection */
		STR_REKEY,
		/* show connection status */
		STR_STATUS,
		/* show verbose connection status */
		STR_STATUS_ALL,
		/* show verbose connection status, non-blocking variant */
		STR_STATUS_ALL_NOBLK,
		/* add a ca information record */
		STR_ADD_CA,
		/* delete ca information record */
		STR_DEL_CA,
		/* set a log type to log/not log */
		STR_LOGLEVEL,
		/* configure global options for stroke */
		STR_CONFIG,
		/* list various objects */
		STR_LIST,
		/* reread various objects */
		STR_REREAD,
		/* purge various objects */
		STR_PURGE,
		/* show pool leases */
		STR_LEASES,
		/* export credentials */
		STR_EXPORT,
		/* print memory usage details */
		STR_MEMUSAGE,
		/* set username and password for a connection */
		STR_USER_CREDS,
		/* print/reset counters */
		STR_COUNTERS,
		/* more to come */
	} type;

	/* verbosity of output returned from charon (-from -1=silent to 4=private)*/
	int output_verbosity;

	union {
		/* data for STR_INITIATE, STR_ROUTE, STR_UP, STR_DOWN, ... */
		struct {
			char *name;
		} initiate, route, unroute, terminate, rekey, status, del_conn, del_ca;

		/* data for STR_TERMINATE_SRCIP */
		struct {
			char *start;
			char *end;
		} terminate_srcip;

		/* data for STR_ADD_CONN */
		struct {
			char *name;
			int version;
			char *eap_identity;
			char *aaa_identity;
			char *xauth_identity;
			int mode;
			int mobike;
			int aggressive;
			int pushmode;
			int force_encap;
			int fragmentation;
			int ipcomp;
			time_t inactivity;
			int proxy_mode;
			int install_policy;
			int close_action;
			u_int32_t reqid;
			u_int32_t tfc;
			u_int8_t ikedscp;

			crl_policy_t crl_policy;
			int unique;
			struct {
				char *ike;
				char *esp;
				char *ah;
			} algorithms;
			struct {
				int reauth;
				time_t ipsec_lifetime;
				time_t ike_lifetime;
				time_t margin;
				u_int64_t life_bytes;
				u_int64_t margin_bytes;
				u_int64_t life_packets;
				u_int64_t margin_packets;
				unsigned long tries;
				unsigned long fuzz;
			} rekey;
			struct {
				time_t delay;
				time_t timeout;
				int action;
			} dpd;
			struct {
				int mediation;
				char *mediated_by;
				char *peerid;
			} ikeme;
			struct {
				u_int32_t value;
				u_int32_t mask;
			} mark_in, mark_out;
			stroke_end_t me, other;
			u_int32_t replay_window;
		} add_conn;

		/* data for STR_ADD_CA */
		struct {
			char *name;
			char *cacert;
			char *crluri;
			char *crluri2;
			char *ocspuri;
			char *ocspuri2;
			char *certuribase;
		} add_ca;

		/* data for STR_LOGLEVEL */
		struct {
			char *type;
			int level;
		} loglevel;

		/* data for STR_CONFIG */
		struct {
			int cachecrl;
		} config;

		/* data for STR_LIST */
		struct {
			list_flag_t flags;
			int utc;
		} list;

		/* data for STR_REREAD */
		struct {
			reread_flag_t flags;
		} reread;

		/* data for STR_PURGE */
		struct {
			purge_flag_t flags;
		} purge;

		/* data for STR_EXPORT */
		struct {
			export_flag_t flags;
			char *selector;
		} export;

		/* data for STR_LEASES */
		struct {
			char *pool;
			char *address;
		} leases;

		/* data for STR_USER_CREDS */
		struct {
			char *name;
			char *username;
			char *password;
		} user_creds;

		/* data for STR_COUNTERS */
		struct {
			/* reset or print counters? */
			int reset;
			char *name;
		} counters;
	};
	/* length of the string buffer */
	u_int16_t buflen;
	/* string buffer */
	char buffer[];
};

#endif /* STROKE_MSG_H_ */