[mirror_ubuntu-zesty-kernel.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>

#include <linux/types.h>

#define SIP_PORT	5060
#define SIP_TIMEOUT	3600

struct nf_ct_sip_master {
	unsigned int	register_cseq;
	unsigned int	invite_cseq;
	__be16		forced_dport;
};

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
7266507d KC	7	#include <linux/types.h>
7266507d KC	8
9fafcd7b PM	9	#define SIP_PORT 5060
	10	#define SIP_TIMEOUT 3600
	11
0f32a40f PM	12	struct nf_ct_sip_master {
0f32a40f PM	13	unsigned int register_cseq;
ef75d49f	14	unsigned int invite_cseq;
7266507d	15	__be16 forced_dport;
0f32a40f PM	16	};
	17
	18	enum sip_expectation_classes {
	19	SIP_EXPECT_SIGNALLING,
	20	SIP_EXPECT_AUDIO,
0d0ab037	21	SIP_EXPECT_VIDEO,
9d288dff	22	SIP_EXPECT_IMAGE,
0f32a40f PM	23	__SIP_EXPECT_MAX
	24	};
	25	#define SIP_EXPECT_MAX (__SIP_EXPECT_MAX - 1)
	26
0d0ab037 PM	27	struct sdp_media_type {
	28	const char *name;
	29	unsigned int len;
	30	enum sip_expectation_classes class;
	31	};
	32
	33	#define SDP_MEDIA_TYPE(__name, __class) \
	34	{ \
	35	.name = (__name), \
	36	.len = sizeof(__name) - 1, \
	37	.class = (__class), \
	38	}
	39
30f33e6d PM	40	struct sip_handler {
	41	const char *method;
	42	unsigned int len;
051966c0 PM	43	int (request)(struct sk_buff skb, unsigned int protoff,
051966c0 PM	44	unsigned int dataoff,
30f33e6d PM	45	const char *dptr, unsigned int datalen,
30f33e6d PM	46	unsigned int cseq);
051966c0 PM	47	int (response)(struct sk_buff skb, unsigned int protoff,
051966c0 PM	48	unsigned int dataoff,
30f33e6d PM	49	const char *dptr, unsigned int datalen,
	50	unsigned int cseq, unsigned int code);
	51	};
	52
	53	#define SIP_HANDLER(__method, __request, __response) \
	54	{ \
	55	.method = (__method), \
	56	.len = sizeof(__method) - 1, \
	57	.request = (__request), \
	58	.response = (__response), \
	59	}
	60
3e9b4600 PM	61	struct sip_header {
	62	const char *name;
	63	const char *cname;
	64	const char *search;
	65	unsigned int len;
	66	unsigned int clen;
	67	unsigned int slen;
	68	int (match_len)(const struct nf_conn ct,
	69	const char dptr, const char limit,
	70	int *shift);
	71	};
	72
	73	#define __SIP_HDR(__name, __cname, __search, __match) \
	74	{ \
	75	.name = (__name), \
	76	.len = sizeof(__name) - 1, \
	77	.cname = (__cname), \
	78	.clen = (__cname) ? sizeof(__cname) - 1 : 0, \
	79	.search = (__search), \
	80	.slen = (__search) ? sizeof(__search) - 1 : 0, \
	81	.match_len = (__match), \
	82	}
	83
ea45f12a PM	84	#define SIP_HDR(__name, __cname, __search, __match) \
	85	__SIP_HDR(__name, __cname, __search, __match)
	86
3e9b4600 PM	87	#define SDP_HDR(__name, __search, __match) \
	88	__SIP_HDR(__name, NULL, __search, __match)
	89
ea45f12a	90	enum sip_header_types {
30f33e6d	91	SIP_HDR_CSEQ,
ea45f12a PM	92	SIP_HDR_FROM,
	93	SIP_HDR_TO,
	94	SIP_HDR_CONTACT,
f5b321bd PM	95	SIP_HDR_VIA_UDP,
f5b321bd PM	96	SIP_HDR_VIA_TCP,
0f32a40f	97	SIP_HDR_EXPIRES,
ea45f12a	98	SIP_HDR_CONTENT_LENGTH,
001985b2	99	SIP_HDR_CALL_ID,
ea45f12a PM	100	};
ea45f12a PM	101
3e9b4600 PM	102	enum sdp_header_types {
	103	SDP_HDR_UNSPEC,
	104	SDP_HDR_VERSION,
9a664821 PM	105	SDP_HDR_OWNER,
9a664821 PM	106	SDP_HDR_CONNECTION,
3e9b4600	107	SDP_HDR_MEDIA,
9fafcd7b PM	108	};
9fafcd7b PM	109
3db05fea	110	extern unsigned int (nf_nat_sip_hook)(struct sk_buff skb,
051966c0	111	unsigned int protoff,
3b6b9fab	112	unsigned int dataoff,
2a6cfb22 PM	113	const char **dptr,
2a6cfb22 PM	114	unsigned int *datalen);
9a664821 PM	115	extern void (nf_nat_sip_seq_adjust_hook)(struct sk_buff skb,
9a664821 PM	116	unsigned int protoff, s16 off);
0f32a40f	117	extern unsigned int (nf_nat_sip_expect_hook)(struct sk_buff skb,
051966c0	118	unsigned int protoff,
3b6b9fab	119	unsigned int dataoff,
0f32a40f PM	120	const char **dptr,
	121	unsigned int *datalen,
	122	struct nf_conntrack_expect *exp,
	123	unsigned int matchoff,
	124	unsigned int matchlen);
4ab9e64e	125	extern unsigned int (nf_nat_sdp_addr_hook)(struct sk_buff skb,
051966c0	126	unsigned int protoff,
4ab9e64e	127	unsigned int dataoff,
3b6b9fab	128	const char **dptr,
4ab9e64e	129	unsigned int *datalen,
3b6b9fab	130	unsigned int sdpoff,
4ab9e64e PM	131	enum sdp_header_types type,
	132	enum sdp_header_types term,
	133	const union nf_inet_addr *addr);
c7f485ab	134	extern unsigned int (nf_nat_sdp_port_hook)(struct sk_buff skb,
051966c0	135	unsigned int protoff,
3b6b9fab	136	unsigned int dataoff,
c7f485ab PM	137	const char **dptr,
	138	unsigned int *datalen,
	139	unsigned int matchoff,
	140	unsigned int matchlen,
	141	u_int16_t port);
4ab9e64e	142	extern unsigned int (nf_nat_sdp_session_hook)(struct sk_buff skb,
051966c0	143	unsigned int protoff,
4ab9e64e	144	unsigned int dataoff,
3b6b9fab	145	const char **dptr,
4ab9e64e	146	unsigned int *datalen,
3b6b9fab	147	unsigned int sdpoff,
4ab9e64e PM	148	const union nf_inet_addr *addr);
4ab9e64e PM	149	extern unsigned int (nf_nat_sdp_media_hook)(struct sk_buff skb,
051966c0	150	unsigned int protoff,
3b6b9fab	151	unsigned int dataoff,
4ab9e64e PM	152	const char **dptr,
	153	unsigned int *datalen,
	154	struct nf_conntrack_expect *rtp_exp,
	155	struct nf_conntrack_expect *rtcp_exp,
	156	unsigned int mediaoff,
	157	unsigned int medialen,
	158	union nf_inet_addr *rtp_addr);
9fafcd7b	159
ac367740 PM	160	extern int ct_sip_parse_request(const struct nf_conn *ct,
ac367740 PM	161	const char *dptr, unsigned int datalen,
624f8b7b PM	162	unsigned int matchoff, unsigned int matchlen,
624f8b7b PM	163	union nf_inet_addr addr, __be16 port);
ea45f12a PM	164	extern int ct_sip_get_header(const struct nf_conn ct, const char dptr,
	165	unsigned int dataoff, unsigned int datalen,
	166	enum sip_header_types type,
	167	unsigned int matchoff, unsigned int matchlen);
05e3ced2 PM	168	extern int ct_sip_parse_header_uri(const struct nf_conn ct, const char dptr,
	169	unsigned int *dataoff, unsigned int datalen,
	170	enum sip_header_types type, int *in_header,
	171	unsigned int matchoff, unsigned int matchlen,
	172	union nf_inet_addr addr, __be16 port);
2bbb2116 PM	173	extern int ct_sip_parse_address_param(const struct nf_conn ct, const char dptr,
	174	unsigned int dataoff, unsigned int datalen,
	175	const char *name,
	176	unsigned int matchoff, unsigned int matchlen,
02b69cbd	177	union nf_inet_addr *addr, bool delim);
2bbb2116 PM	178	extern int ct_sip_parse_numerical_param(const struct nf_conn ct, const char dptr,
	179	unsigned int off, unsigned int datalen,
	180	const char *name,
	181	unsigned int matchoff, unsigned int matchen,
	182	unsigned int *val);
3e9b4600 PM	183
	184	extern int ct_sip_get_sdp_header(const struct nf_conn ct, const char dptr,
	185	unsigned int dataoff, unsigned int datalen,
	186	enum sdp_header_types type,
	187	enum sdp_header_types term,
	188	unsigned int matchoff, unsigned int matchlen);
	189
9fafcd7b PM	190	#endif /* __KERNEL__ */
9fafcd7b PM	191	#endif /* __NF_CONNTRACK_SIP_H__ */