kamailio/modules/sctp/sctp_options.h

/* 
 * $Id$
 * 
 * Copyright (C) 2008 iptelorg GmbH
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
/* 
 * sctp options
 */
/*
 * History:
 * --------
 *  2008-08-07  initial version (andrei)
 *  2009-05-26  runtime cfg support (andrei)
 */

#ifndef _sctp_options_h
#define _sctp_options_h

#ifndef NO_SCTP_CONN_REUSE
/* SCTP connection reuse by default */
#define SCTP_CONN_REUSE
#endif

#define DEFAULT_SCTP_AUTOCLOSE 180 /* seconds */
#define DEFAULT_SCTP_SEND_TTL  32000 /* in ms (32s)  */
#define DEFAULT_SCTP_SEND_RETRIES 0
#define MAX_SCTP_SEND_RETRIES 9


struct cfg_group_sctp{
	int so_rcvbuf;
	int so_sndbuf;
	unsigned int autoclose; /* in seconds */
	unsigned int send_ttl; /* in milliseconds */
	unsigned int send_retries;
	int assoc_tracking; /* track associations */
	int assoc_reuse; /* reuse the request connection for sending the reply,
					    depends on assoc_tracking */
	int max_assocs; /* maximum associations, -1 means disabled */
	unsigned int srto_initial; /** initial retr. timeout */
	unsigned int srto_max;     /** max retr. timeout */
	unsigned int srto_min;     /** min retr. timeout */
	unsigned int asocmaxrxt; /** max. retr. attempts per association */
	unsigned int init_max_attempts; /** max., INIT retr. attempts */
	unsigned int init_max_timeo; /** rto max for INIT */
	unsigned int hbinterval;  /** heartbeat interval in msecs */
	unsigned int pathmaxrxt;  /** max. retr. attempts per path */
	unsigned int sack_delay; /** msecs after which a delayed SACK is sent */
	unsigned int sack_freq; /** no. of packets after which a SACK is sent */
	unsigned int max_burst; /** maximum burst of packets per assoc. */
};

extern struct cfg_group_sctp sctp_default_cfg;

/* sctp config handle */
extern void* sctp_cfg;

void init_sctp_options(void);
void sctp_options_check(void);
int sctp_register_cfg(void);
void sctp_options_get(struct cfg_group_sctp *s);
int sctp_get_os_defaults(struct cfg_group_sctp *s);
int sctp_get_cfg_from_sock(int s, struct cfg_group_sctp* cfg);

#endif /* _sctp_options_h */