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/*
* libipvs.h: header file for the library ipvs
*
* Version: $Id: libipvs.h,v 1.7 2003/06/08 09:31:39 wensong Exp $
*
* Authors: Wensong Zhang <wensong@linuxvirtualserver.org>
*
*/
#ifndef _LIBIPVS_H
#define _LIBIPVS_H
#include "ip_vs.h"
#define MINIMUM_IPVS_VERSION_MAJOR 1
#define MINIMUM_IPVS_VERSION_MINOR 1
#define MINIMUM_IPVS_VERSION_PATCH 4
#ifndef IPVS_VERSION
#define IPVS_VERSION(x,y,z) (((x)<<16)+((y)<<8)+(z))
#endif
/*
* The default IPVS_SVC_PERSISTENT_TIMEOUT is a little larger than average
* connection time plus IPVS TCP FIN timeout (2*60 seconds). Because the
* connection template won't be released until its controlled connection
* entries are expired.
* If IPVS_SVC_PERSISTENT_TIMEOUT is too less, the template will expire
* soon and will be put in expire again and again, which causes additional
* overhead. If it is too large, the same will always visit the same
* server, which may make dynamic load imbalance worse.
*/
#define IPVS_SVC_PERSISTENT_TIMEOUT (6*60)
typedef struct ip_vs_service_user ipvs_service_t;
typedef struct ip_vs_dest_user ipvs_dest_t;
typedef struct ip_vs_timeout_user ipvs_timeout_t;
typedef struct ip_vs_daemon_user ipvs_daemon_t;
typedef struct ip_vs_service_entry ipvs_service_entry_t;
typedef struct ip_vs_dest_entry ipvs_dest_entry_t;
/* ipvs info variable */
extern struct ip_vs_getinfo ipvs_info;
/* init socket and get ipvs info */
extern int ipvs_init(void);
/* get ipvs info separately */
extern int ipvs_getinfo(void);
/* get the version number */
extern unsigned int ipvs_version(void);
/* flush all the rules */
extern int ipvs_flush(void);
/* add a virtual service */
extern int ipvs_add_service(ipvs_service_t *svc);
/* update a virtual service with new options */
extern int ipvs_update_service(ipvs_service_t *svc);
/* delete a virtual service */
extern int ipvs_del_service(ipvs_service_t *svc);
/* zero the counters of a service or all */
extern int ipvs_zero_service(ipvs_service_t *svc);
/* add a destination server into a service */
extern int ipvs_add_dest(ipvs_service_t *svc, ipvs_dest_t *dest);
/* update a destination server with new options */
extern int ipvs_update_dest(ipvs_service_t *svc, ipvs_dest_t *dest);
/* remove a destination server from a service */
extern int ipvs_del_dest(ipvs_service_t *svc, ipvs_dest_t *dest);
/* set timeout */
extern int ipvs_set_timeout(ipvs_timeout_t *to);
/* start a connection synchronizaiton daemon (master/backup) */
extern int ipvs_start_daemon(ipvs_daemon_t *dm);
/* stop a connection synchronizaiton daemon (master/backup) */
extern int ipvs_stop_daemon(ipvs_daemon_t *dm);
/* get all the ipvs services */
extern struct ip_vs_get_services *ipvs_get_services(void);
/* sort the service entries */
typedef int (*ipvs_service_cmp_t)(ipvs_service_entry_t *,
ipvs_service_entry_t *);
extern int ipvs_cmp_services(ipvs_service_entry_t *s1,
ipvs_service_entry_t *s2);
extern void ipvs_sort_services(struct ip_vs_get_services *s,
ipvs_service_cmp_t f);
/* get the destination array of the specified service */
extern struct ip_vs_get_dests *ipvs_get_dests(ipvs_service_entry_t *svc);
/* sort the destination entries */
typedef int (*ipvs_dest_cmp_t)(ipvs_dest_entry_t *,
ipvs_dest_entry_t *);
extern int ipvs_cmp_dests(ipvs_dest_entry_t *d1,
ipvs_dest_entry_t *d2);
extern void ipvs_sort_dests(struct ip_vs_get_dests *d,
ipvs_dest_cmp_t f);
/* get an ipvs service entry */
extern ipvs_service_entry_t *
ipvs_get_service(__u32 fwmark, __u16 af, __u16 protocol, union nf_inet_addr addr, __u16 port);
/* get ipvs timeout */
extern ipvs_timeout_t *ipvs_get_timeout(void);
/* get ipvs daemon information */
extern ipvs_daemon_t *ipvs_get_daemon(void);
/* close the socket */
extern void ipvs_close(void);
extern const char *ipvs_strerror(int err);
#endif /* _LIBIPVS_H */
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