nsrsbc.h

简单的基于SIP的会话边界控制器

/* symbolic return state */
#define STS_SUCCESS	0	/* SUCCESS				*/
#define STS_TRUE	0	/* TRUE					*/
#define STS_FAILURE	1	/* FAILURE				*/
#define STS_FALSE	1	/* FALSE				*/

/*
 * some constant definitions
 */
#define SIP_LISTENING_PORT 5060	/* default port to listen */
#define INTERFACE_SENDING_PORT 5065  /* default port to send message to interface */
#define INTERFACE_LISTENING_PORT 9010 /* default port to listen of interface */
#define DEFAULT_MAXFWD	70	/* default Max-Forward count */
#define DEFAULT_EXPIRES	60	/* default Expires timeout */

#define RTPPROXY_SIZE	128	/* number of rtp proxy entries		*/
				/* this limits the number of calls!	*/

#define BUFFER_SIZE	8196 /* input buffer for read from socket	*/
#define RTP_BUFFER_SIZE	512	/* max size of an RTP frame		*/
#define URL_STRING_SIZE	128	/* max size of an URL/URI string	*/
#define STATUSCODE_SIZE 5	/* size of string representation of status */
#define IFADR_CACHE_SIZE 32	/* number of entries in internal IFADR cache */
#define IFADR_MAX_AGE	5	/* max. age of the IF address cache (sec) */
#define IFNAME_SIZE	16	/* max string length of a interface name */

#define HOSTNAME_SIZE	128	/* max string length of a hostname	*/
#define PORT_SIZE	6	/* max string length of a port number	*/
#define USERNAME_SIZE	128	/* max string length of a username (auth) */
#define PASSWORD_SIZE	128	/* max string length of a password (auth) */
#define VIA_BRANCH_SIZE 128	/* max string length for via branch param */
				/* scratch buffer for gethostbyname_r() */
#define CALLID_SIZE	256	/* max string length of call id header */

#define PROTO_UNKN -1
#define PROTO_UDP  1
#define PROTO_TCP  2
#define REQTYP_INCOMING		1
#define REQTYP_OUTGOING		2
#define RESTYP_INCOMING		3
#define RESTYP_OUTGOING		4

/* symbolic direction of data */
#define DIR_INCOMING	1
#define DIR_OUTGOING	2

/*
 * SIP ticket
 */
typedef struct {
	osip_message_t *sipmsg;		/* SIP */
	struct sockaddr_in from;	/* received from */
	int protocol;			/* received by protocol */
	int direction;			/* direction as determined by proxy */
}sip_ticket_t;


/* sip_sock.c */
int sipsock_listen(void);
int sipsock_wait(void);
int sipsock_read(void *buf, size_t bufsize, struct sockaddr_in *from, int *protocol);
int sipsock_send(struct in_addr addr, int port,	int protocol, char *buffer, size_t size);
int sockbind(struct in_addr ipaddr, int localport);

/* proxy.c */
int proxy_request(sip_ticket_t *ticket);
int proxy_response(sip_ticket_t *ticket);
int proxy_rewrite_register(sip_ticket_t *ticket);
int proxy_rewrite_register_response(sip_ticket_t *ticket);
int sip_rewrite_sdp(sip_ticket_t *ticket, int direction);
char *osip_call_id_new_random(void);

/* sip_utils.c */
int sip_rewrite_requri(osip_message_t *mymsg, int type, int idx);
int sip_calculate_branch_id(sip_ticket_t *ticket, char *id);
int sip_find_direction(sip_ticket_t *ticket);
int is_via_local(osip_via_t *via);
int sip_add_myvia(sip_ticket_t *ticket);
int sip_del_myvia(sip_ticket_t *ticket);
int sip_rewrite_via(osip_message_t *mymsg, int type, int idx);
int sip_rewrite_contact(osip_message_t *mymsg);
int sip_rewrite_from(osip_message_t *mymsg, int type, int idx);
int sip_rewrite_to(osip_message_t *mymsg, int type, int idx);
int sip_rewrite_callid(osip_message_t *mymsg, char *ncid, int direction, int idx);
int sip_add_recordroute(sip_ticket_t *ticket);
int sip_del_route(sip_ticket_t *ticket);
int sip_purge_recordroute(sip_ticket_t *ticket);
int compare_callid(osip_call_id_t *cid1, osip_call_id_t *cid2);

/* accessctl.c */
int accesslist_check(struct sockaddr_in from);

/* rtpproxy.c */
int  rtpproxy_init( void );						
int  rtp_start_fwd (osip_call_id_t *callid, char *client_id,           
                    int direction, int media_stream_no,
                    struct in_addr outbound_ipaddr, int *outboundport,
                    struct in_addr lcl_client_ipaddr, int lcl_clientport);
int  rtp_stop_fwd (osip_call_id_t *callid, int direction);