[deliverable/linux.git] / include / linux / netfilter / nf_conntrack_sip.h

#ifndef __NF_CONNTRACK_SIP_H__
#define __NF_CONNTRACK_SIP_H__
#ifdef __KERNEL__

#include <net/netfilter/nf_conntrack_expect.h>

#define SIP_PORT	5060
#define SIP_TIMEOUT	3600

struct nf_ct_sip_master {
	unsigned int	register_cseq;
	unsigned int	invite_cseq;
};

enum sip_expectation_classes {
	SIP_EXPECT_SIGNALLING,
	SIP_EXPECT_AUDIO,
	SIP_EXPECT_VIDEO,
	SIP_EXPECT_IMAGE,
	__SIP_EXPECT_MAX
};
#define SIP_EXPECT_MAX	(__SIP_EXPECT_MAX - 1)

struct sdp_media_type {
	const char			*name;
	unsigned int			len;
	enum sip_expectation_classes	class;
};

#define SDP_MEDIA_TYPE(__name, __class)					\
{									\
	.name	= (__name),						\
	.len	= sizeof(__name) - 1,					\
	.class	= (__class),						\
}

struct sip_handler {
	const char	*method;
	unsigned int	len;
	int		(*request)(struct sk_buff *skb, unsigned int protoff,
				   unsigned int dataoff,
				   const char **dptr, unsigned int *datalen,
				   unsigned int cseq);
	int		(*response)(struct sk_buff *skb, unsigned int protoff,
				    unsigned int dataoff,
				    const char **dptr, unsigned int *datalen,
				    unsigned int cseq, unsigned int code);
};

#define SIP_HANDLER(__method, __request, __response)			\
{									\
	.method		= (__method),					\
	.len		= sizeof(__method) - 1,				\
	.request	= (__request),					\
	.response	= (__response),					\
}

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_CSEQ,
	SIP_HDR_FROM,
	SIP_HDR_TO,
	SIP_HDR_CONTACT,
	SIP_HDR_VIA_UDP,
	SIP_HDR_VIA_TCP,
	SIP_HDR_EXPIRES,
	SIP_HDR_CONTENT_LENGTH,
	SIP_HDR_CALL_ID,
};

enum sdp_header_types {
	SDP_HDR_UNSPEC,
	SDP_HDR_VERSION,
	SDP_HDR_OWNER,
	SDP_HDR_CONNECTION,
	SDP_HDR_MEDIA,
};

extern unsigned int (*nf_nat_sip_hook)(struct sk_buff *skb,
				       unsigned int protoff,
				       unsigned int dataoff,
				       const char **dptr,
				       unsigned int *datalen);
extern void (*nf_nat_sip_seq_adjust_hook)(struct sk_buff *skb,
					  unsigned int protoff, s16 off);
extern unsigned int (*nf_nat_sip_expect_hook)(struct sk_buff *skb,
					      unsigned int protoff,
					      unsigned int dataoff,
					      const char **dptr,
					      unsigned int *datalen,
					      struct nf_conntrack_expect *exp,
					      unsigned int matchoff,
					      unsigned int matchlen);
extern unsigned int (*nf_nat_sdp_addr_hook)(struct sk_buff *skb,
					    unsigned int protoff,
					    unsigned int dataoff,
					    const char **dptr,
					    unsigned int *datalen,
					    unsigned int sdpoff,
					    enum sdp_header_types type,
					    enum sdp_header_types term,
					    const union nf_inet_addr *addr);
extern unsigned int (*nf_nat_sdp_port_hook)(struct sk_buff *skb,
					    unsigned int protoff,
					    unsigned int dataoff,
					    const char **dptr,
					    unsigned int *datalen,
					    unsigned int matchoff,
					    unsigned int matchlen,
					    u_int16_t port);
extern unsigned int (*nf_nat_sdp_session_hook)(struct sk_buff *skb,
					       unsigned int protoff,
					       unsigned int dataoff,
					       const char **dptr,
					       unsigned int *datalen,
					       unsigned int sdpoff,
					       const union nf_inet_addr *addr);
extern unsigned int (*nf_nat_sdp_media_hook)(struct sk_buff *skb,
					     unsigned int protoff,
					     unsigned int dataoff,
					     const char **dptr,
					     unsigned int *datalen,
					     struct nf_conntrack_expect *rtp_exp,
					     struct nf_conntrack_expect *rtcp_exp,
					     unsigned int mediaoff,
					     unsigned int medialen,
					     union nf_inet_addr *rtp_addr);

extern int ct_sip_parse_request(const struct nf_conn *ct,
				const char *dptr, unsigned int datalen,
				unsigned int *matchoff, unsigned int *matchlen,
				union nf_inet_addr *addr, __be16 *port);
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_parse_header_uri(const struct nf_conn *ct, const char *dptr,
				   unsigned int *dataoff, unsigned int datalen,
				   enum sip_header_types type, int *in_header,
				   unsigned int *matchoff, unsigned int *matchlen,
				   union nf_inet_addr *addr, __be16 *port);
extern int ct_sip_parse_address_param(const struct nf_conn *ct, const char *dptr,
				      unsigned int dataoff, unsigned int datalen,
				      const char *name,
				      unsigned int *matchoff, unsigned int *matchlen,
				      union nf_inet_addr *addr, bool delim);
extern int ct_sip_parse_numerical_param(const struct nf_conn *ct, const char *dptr,
					unsigned int off, unsigned int datalen,
					const char *name,
					unsigned int *matchoff, unsigned int *matchen,
					unsigned int *val);

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__ */
Commit	Line	Data
9fafcd7b PM	1	#ifndef __NF_CONNTRACK_SIP_H__
	2	#define __NF_CONNTRACK_SIP_H__
	3	#ifdef __KERNEL__
	4
1afc5679 PNA	5	#include <net/netfilter/nf_conntrack_expect.h>
1afc5679 PNA	6
9fafcd7b PM	7	#define SIP_PORT 5060
	8	#define SIP_TIMEOUT 3600
	9
0f32a40f PM	10	struct nf_ct_sip_master {
0f32a40f PM	11	unsigned int register_cseq;
ef75d49f	12	unsigned int invite_cseq;
0f32a40f PM	13	};
	14
	15	enum sip_expectation_classes {
	16	SIP_EXPECT_SIGNALLING,
	17	SIP_EXPECT_AUDIO,
0d0ab037	18	SIP_EXPECT_VIDEO,
9d288dff	19	SIP_EXPECT_IMAGE,
0f32a40f PM	20	__SIP_EXPECT_MAX
	21	};
	22	#define SIP_EXPECT_MAX (__SIP_EXPECT_MAX - 1)
	23
0d0ab037 PM	24	struct sdp_media_type {
	25	const char *name;
	26	unsigned int len;
	27	enum sip_expectation_classes class;
	28	};
	29
	30	#define SDP_MEDIA_TYPE(__name, __class) \
	31	{ \
	32	.name = (__name), \
	33	.len = sizeof(__name) - 1, \
	34	.class = (__class), \
	35	}
	36
30f33e6d PM	37	struct sip_handler {
	38	const char *method;
	39	unsigned int len;
051966c0 PM	40	int (request)(struct sk_buff skb, unsigned int protoff,
051966c0 PM	41	unsigned int dataoff,
30f33e6d PM	42	const char *dptr, unsigned int datalen,
30f33e6d PM	43	unsigned int cseq);
051966c0 PM	44	int (response)(struct sk_buff skb, unsigned int protoff,
051966c0 PM	45	unsigned int dataoff,
30f33e6d PM	46	const char *dptr, unsigned int datalen,
	47	unsigned int cseq, unsigned int code);
	48	};
	49
	50	#define SIP_HANDLER(__method, __request, __response) \
	51	{ \
	52	.method = (__method), \
	53	.len = sizeof(__method) - 1, \
	54	.request = (__request), \
	55	.response = (__response), \
	56	}
	57
3e9b4600 PM	58	struct sip_header {
	59	const char *name;
	60	const char *cname;
	61	const char *search;
	62	unsigned int len;
	63	unsigned int clen;
	64	unsigned int slen;
	65	int (match_len)(const struct nf_conn ct,
	66	const char dptr, const char limit,
	67	int *shift);
	68	};
	69
	70	#define __SIP_HDR(__name, __cname, __search, __match) \
	71	{ \
	72	.name = (__name), \
	73	.len = sizeof(__name) - 1, \
	74	.cname = (__cname), \
	75	.clen = (__cname) ? sizeof(__cname) - 1 : 0, \
	76	.search = (__search), \
	77	.slen = (__search) ? sizeof(__search) - 1 : 0, \
	78	.match_len = (__match), \
	79	}
	80
ea45f12a PM	81	#define SIP_HDR(__name, __cname, __search, __match) \
	82	__SIP_HDR(__name, __cname, __search, __match)
	83
3e9b4600 PM	84	#define SDP_HDR(__name, __search, __match) \
	85	__SIP_HDR(__name, NULL, __search, __match)
	86
ea45f12a	87	enum sip_header_types {
30f33e6d	88	SIP_HDR_CSEQ,
ea45f12a PM	89	SIP_HDR_FROM,
	90	SIP_HDR_TO,
	91	SIP_HDR_CONTACT,
f5b321bd PM	92	SIP_HDR_VIA_UDP,
f5b321bd PM	93	SIP_HDR_VIA_TCP,
0f32a40f	94	SIP_HDR_EXPIRES,
ea45f12a	95	SIP_HDR_CONTENT_LENGTH,
001985b2	96	SIP_HDR_CALL_ID,
ea45f12a PM	97	};
ea45f12a PM	98
3e9b4600 PM	99	enum sdp_header_types {
	100	SDP_HDR_UNSPEC,
	101	SDP_HDR_VERSION,
9a664821 PM	102	SDP_HDR_OWNER,
9a664821 PM	103	SDP_HDR_CONNECTION,
3e9b4600	104	SDP_HDR_MEDIA,
9fafcd7b PM	105	};
9fafcd7b PM	106
3db05fea	107	extern unsigned int (nf_nat_sip_hook)(struct sk_buff skb,
051966c0	108	unsigned int protoff,
3b6b9fab	109	unsigned int dataoff,
2a6cfb22 PM	110	const char **dptr,
2a6cfb22 PM	111	unsigned int *datalen);
9a664821 PM	112	extern void (nf_nat_sip_seq_adjust_hook)(struct sk_buff skb,
9a664821 PM	113	unsigned int protoff, s16 off);
0f32a40f	114	extern unsigned int (nf_nat_sip_expect_hook)(struct sk_buff skb,
051966c0	115	unsigned int protoff,
3b6b9fab	116	unsigned int dataoff,
0f32a40f PM	117	const char **dptr,
	118	unsigned int *datalen,
	119	struct nf_conntrack_expect *exp,
	120	unsigned int matchoff,
	121	unsigned int matchlen);
4ab9e64e	122	extern unsigned int (nf_nat_sdp_addr_hook)(struct sk_buff skb,
051966c0	123	unsigned int protoff,
4ab9e64e	124	unsigned int dataoff,
3b6b9fab	125	const char **dptr,
4ab9e64e	126	unsigned int *datalen,
3b6b9fab	127	unsigned int sdpoff,
4ab9e64e PM	128	enum sdp_header_types type,
	129	enum sdp_header_types term,
	130	const union nf_inet_addr *addr);
c7f485ab	131	extern unsigned int (nf_nat_sdp_port_hook)(struct sk_buff skb,
051966c0	132	unsigned int protoff,
3b6b9fab	133	unsigned int dataoff,
c7f485ab PM	134	const char **dptr,
	135	unsigned int *datalen,
	136	unsigned int matchoff,
	137	unsigned int matchlen,
	138	u_int16_t port);
4ab9e64e	139	extern unsigned int (nf_nat_sdp_session_hook)(struct sk_buff skb,
051966c0	140	unsigned int protoff,
4ab9e64e	141	unsigned int dataoff,
3b6b9fab	142	const char **dptr,
4ab9e64e	143	unsigned int *datalen,
3b6b9fab	144	unsigned int sdpoff,
4ab9e64e PM	145	const union nf_inet_addr *addr);
4ab9e64e PM	146	extern unsigned int (nf_nat_sdp_media_hook)(struct sk_buff skb,
051966c0	147	unsigned int protoff,
3b6b9fab	148	unsigned int dataoff,
4ab9e64e PM	149	const char **dptr,
	150	unsigned int *datalen,
	151	struct nf_conntrack_expect *rtp_exp,
	152	struct nf_conntrack_expect *rtcp_exp,
	153	unsigned int mediaoff,
	154	unsigned int medialen,
	155	union nf_inet_addr *rtp_addr);
9fafcd7b	156
ac367740 PM	157	extern int ct_sip_parse_request(const struct nf_conn *ct,
ac367740 PM	158	const char *dptr, unsigned int datalen,
624f8b7b PM	159	unsigned int matchoff, unsigned int matchlen,
624f8b7b PM	160	union nf_inet_addr addr, __be16 port);
ea45f12a PM	161	extern int ct_sip_get_header(const struct nf_conn ct, const char dptr,
	162	unsigned int dataoff, unsigned int datalen,
	163	enum sip_header_types type,
	164	unsigned int matchoff, unsigned int matchlen);
05e3ced2 PM	165	extern int ct_sip_parse_header_uri(const struct nf_conn ct, const char dptr,
	166	unsigned int *dataoff, unsigned int datalen,
	167	enum sip_header_types type, int *in_header,
	168	unsigned int matchoff, unsigned int matchlen,
	169	union nf_inet_addr addr, __be16 port);
2bbb2116 PM	170	extern int ct_sip_parse_address_param(const struct nf_conn ct, const char dptr,
	171	unsigned int dataoff, unsigned int datalen,
	172	const char *name,
	173	unsigned int matchoff, unsigned int matchlen,
02b69cbd	174	union nf_inet_addr *addr, bool delim);
2bbb2116 PM	175	extern int ct_sip_parse_numerical_param(const struct nf_conn ct, const char dptr,
	176	unsigned int off, unsigned int datalen,
	177	const char *name,
	178	unsigned int matchoff, unsigned int matchen,
	179	unsigned int *val);
3e9b4600 PM	180
	181	extern int ct_sip_get_sdp_header(const struct nf_conn ct, const char dptr,
	182	unsigned int dataoff, unsigned int datalen,
	183	enum sdp_header_types type,
	184	enum sdp_header_types term,
	185	unsigned int matchoff, unsigned int matchlen);
	186
9fafcd7b PM	187	#endif /* __KERNEL__ */
9fafcd7b PM	188	#endif /* __NF_CONNTRACK_SIP_H__ */