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#ifndef _IP_CONNTRACK_SIP_H
#define _IP_CONNTRACK_SIP_H
/* SIP tracking. */
#ifdef __KERNEL__
#include <linux/netfilter_ipv4/lockhelp.h>
/* Protects sip part of conntracks */
DECLARE_LOCK_EXTERN(ip_sip_lock);
#define SIP_PORT 5060 /* UDP */
#define SIP_EXPIRES 3600 /* seconds */
#define RTP_TIMEOUT 180 /* seconds */
#endif /* __KERNEL__ */
/* SIP Request */
#define SIP_INVITE 0x01
#define SIP_ACK 0x02
#define SIP_BYE 0x04
/* SIP Response */
#define SIP_100 0x10
#define SIP_200 0x20
#define SIP_200_BYE 0x40
/* SIP session direction */
#define SIP_OUTGOING 0
#define SIP_INCOMING 1
enum ip_ct_conntype
{
CONN_SIP,
CONN_RTP,
CONN_RTCP,
};
/* This structure is per expected connection */
struct ip_ct_sip_expect
{
u_int16_t port; /* TCP port that was to be used */
enum ip_ct_conntype type;
int nated;
};
/* This structure exists only once per master */
struct ip_ct_sip_master {
int mangled;
u_int16_t rtpport;
};
extern u_int16_t find_sdp_audio_port(const char *data, size_t dlen,
unsigned int *numoff, unsigned int *numlen);
extern int find_sdp_rtp_addr(const char *data, size_t dlen,
unsigned int *numoff, unsigned int *numlen, u_int32_t *addr);
#endif /* _IP_CONNTRACK_SIP_H */
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