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#ifndef __NF_CONNTRACK_SIP_H__
#define __NF_CONNTRACK_SIP_H__
#ifdef __KERNEL__
#define SIP_PORT 5060
#define SIP_TIMEOUT 3600
struct sip_header {
const char *name;
const char *cname;
const char *search;
unsigned int len;
unsigned int clen;
unsigned int slen;
int (*match_len)(const struct nf_conn *ct,
const char *dptr, const char *limit,
int *shift);
};
#define __SIP_HDR(__name, __cname, __search, __match) \
{ \
.name = (__name), \
.len = sizeof(__name) - 1, \
.cname = (__cname), \
.clen = (__cname) ? sizeof(__cname) - 1 : 0, \
.search = (__search), \
.slen = (__search) ? sizeof(__search) - 1 : 0, \
.match_len = (__match), \
}
#define SIP_HDR(__name, __cname, __search, __match) \
__SIP_HDR(__name, __cname, __search, __match)
#define SDP_HDR(__name, __search, __match) \
__SIP_HDR(__name, NULL, __search, __match)
enum sip_header_types {
SIP_HDR_FROM,
SIP_HDR_TO,
SIP_HDR_CONTACT,
SIP_HDR_VIA,
SIP_HDR_CONTENT_LENGTH,
};
enum sdp_header_types {
SDP_HDR_UNSPEC,
SDP_HDR_VERSION,
SDP_HDR_OWNER_IP4,
SDP_HDR_CONNECTION_IP4,
SDP_HDR_OWNER_IP6,
SDP_HDR_CONNECTION_IP6,
SDP_HDR_MEDIA,
};
extern unsigned int (*nf_nat_sip_hook)(struct sk_buff *skb,
const char **dptr,
unsigned int *datalen);
extern unsigned int (*nf_nat_sdp_hook)(struct sk_buff *skb,
const char **dptr,
unsigned int *datalen,
struct nf_conntrack_expect *exp);
extern int ct_sip_parse_request(const struct nf_conn *ct,
const char *dptr, unsigned int datalen,
unsigned int *matchoff, unsigned int *matchlen);
extern int ct_sip_get_header(const struct nf_conn *ct, const char *dptr,
unsigned int dataoff, unsigned int datalen,
enum sip_header_types type,
unsigned int *matchoff, unsigned int *matchlen);
extern int ct_sip_get_sdp_header(const struct nf_conn *ct, const char *dptr,
unsigned int dataoff, unsigned int datalen,
enum sdp_header_types type,
enum sdp_header_types term,
unsigned int *matchoff, unsigned int *matchlen);
#endif /* __KERNEL__ */
#endif /* __NF_CONNTRACK_SIP_H__ */
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