[linux-block.git] / include / linux / netfilter / nf_conntrack_sip.h

/* SPDX-License-Identifier: GPL-2.0 */
#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,
};

struct nf_nat_sip_hooks {
	unsigned int (*msg)(struct sk_buff *skb,
			    unsigned int protoff,
			    unsigned int dataoff,
			    const char **dptr,
			    unsigned int *datalen);

	void (*seq_adjust)(struct sk_buff *skb,
			   unsigned int protoff, s16 off);

	unsigned int (*expect)(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);

	unsigned int (*sdp_addr)(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);

	unsigned int (*sdp_port)(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);

	unsigned int (*sdp_session)(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);

	unsigned int (*sdp_media)(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 const struct nf_nat_sip_hooks *nf_nat_sip_hooks;

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);
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);
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);
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);
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);

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
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
9fafcd7b PM	2	#ifndef __NF_CONNTRACK_SIP_H__
	3	#define __NF_CONNTRACK_SIP_H__
	4	#ifdef __KERNEL__
	5
1afc5679 PNA	6	#include <net/netfilter/nf_conntrack_expect.h>
1afc5679 PNA	7
7266507d KC	8	#include <linux/types.h>
7266507d KC	9
9fafcd7b PM	10	#define SIP_PORT 5060
	11	#define SIP_TIMEOUT 3600
	12
0f32a40f PM	13	struct nf_ct_sip_master {
0f32a40f PM	14	unsigned int register_cseq;
ef75d49f	15	unsigned int invite_cseq;
7266507d	16	__be16 forced_dport;
0f32a40f PM	17	};
	18
	19	enum sip_expectation_classes {
	20	SIP_EXPECT_SIGNALLING,
	21	SIP_EXPECT_AUDIO,
0d0ab037	22	SIP_EXPECT_VIDEO,
9d288dff	23	SIP_EXPECT_IMAGE,
0f32a40f PM	24	__SIP_EXPECT_MAX
	25	};
	26	#define SIP_EXPECT_MAX (__SIP_EXPECT_MAX - 1)
	27
0d0ab037 PM	28	struct sdp_media_type {
	29	const char *name;
	30	unsigned int len;
	31	enum sip_expectation_classes class;
	32	};
	33
	34	#define SDP_MEDIA_TYPE(__name, __class) \
	35	{ \
	36	.name = (__name), \
	37	.len = sizeof(__name) - 1, \
	38	.class = (__class), \
	39	}
	40
30f33e6d PM	41	struct sip_handler {
	42	const char *method;
	43	unsigned int len;
051966c0 PM	44	int (request)(struct sk_buff skb, unsigned int protoff,
051966c0 PM	45	unsigned int dataoff,
30f33e6d PM	46	const char *dptr, unsigned int datalen,
30f33e6d PM	47	unsigned int cseq);
051966c0 PM	48	int (response)(struct sk_buff skb, unsigned int protoff,
051966c0 PM	49	unsigned int dataoff,
30f33e6d PM	50	const char *dptr, unsigned int datalen,
	51	unsigned int cseq, unsigned int code);
	52	};
	53
	54	#define SIP_HANDLER(__method, __request, __response) \
	55	{ \
	56	.method = (__method), \
	57	.len = sizeof(__method) - 1, \
	58	.request = (__request), \
	59	.response = (__response), \
	60	}
	61
3e9b4600 PM	62	struct sip_header {
	63	const char *name;
	64	const char *cname;
	65	const char *search;
	66	unsigned int len;
	67	unsigned int clen;
	68	unsigned int slen;
	69	int (match_len)(const struct nf_conn ct,
	70	const char dptr, const char limit,
	71	int *shift);
	72	};
	73
	74	#define __SIP_HDR(__name, __cname, __search, __match) \
	75	{ \
	76	.name = (__name), \
	77	.len = sizeof(__name) - 1, \
	78	.cname = (__cname), \
	79	.clen = (__cname) ? sizeof(__cname) - 1 : 0, \
	80	.search = (__search), \
	81	.slen = (__search) ? sizeof(__search) - 1 : 0, \
	82	.match_len = (__match), \
	83	}
	84
ea45f12a PM	85	#define SIP_HDR(__name, __cname, __search, __match) \
	86	__SIP_HDR(__name, __cname, __search, __match)
	87
3e9b4600 PM	88	#define SDP_HDR(__name, __search, __match) \
	89	__SIP_HDR(__name, NULL, __search, __match)
	90
ea45f12a	91	enum sip_header_types {
30f33e6d	92	SIP_HDR_CSEQ,
ea45f12a PM	93	SIP_HDR_FROM,
	94	SIP_HDR_TO,
	95	SIP_HDR_CONTACT,
f5b321bd PM	96	SIP_HDR_VIA_UDP,
f5b321bd PM	97	SIP_HDR_VIA_TCP,
0f32a40f	98	SIP_HDR_EXPIRES,
ea45f12a	99	SIP_HDR_CONTENT_LENGTH,
001985b2	100	SIP_HDR_CALL_ID,
ea45f12a PM	101	};
ea45f12a PM	102
3e9b4600 PM	103	enum sdp_header_types {
	104	SDP_HDR_UNSPEC,
	105	SDP_HDR_VERSION,
9a664821 PM	106	SDP_HDR_OWNER,
9a664821 PM	107	SDP_HDR_CONNECTION,
3e9b4600	108	SDP_HDR_MEDIA,
9fafcd7b PM	109	};
9fafcd7b PM	110
180cf72f	111	struct nf_nat_sip_hooks {
	112	unsigned int (msg)(struct sk_buff skb,
	113	unsigned int protoff,
	114	unsigned int dataoff,
	115	const char **dptr,
	116	unsigned int *datalen);
	117
	118	void (seq_adjust)(struct sk_buff skb,
	119	unsigned int protoff, s16 off);
	120
	121	unsigned int (expect)(struct sk_buff skb,
	122	unsigned int protoff,
	123	unsigned int dataoff,
	124	const char **dptr,
	125	unsigned int *datalen,
	126	struct nf_conntrack_expect *exp,
	127	unsigned int matchoff,
	128	unsigned int matchlen);
	129
	130	unsigned int (sdp_addr)(struct sk_buff skb,
	131	unsigned int protoff,
	132	unsigned int dataoff,
	133	const char **dptr,
	134	unsigned int *datalen,
	135	unsigned int sdpoff,
	136	enum sdp_header_types type,
	137	enum sdp_header_types term,
	138	const union nf_inet_addr *addr);
	139
	140	unsigned int (sdp_port)(struct sk_buff skb,
	141	unsigned int protoff,
	142	unsigned int dataoff,
	143	const char **dptr,
	144	unsigned int *datalen,
	145	unsigned int matchoff,
	146	unsigned int matchlen,
	147	u_int16_t port);
	148
	149	unsigned int (sdp_session)(struct sk_buff skb,
	150	unsigned int protoff,
	151	unsigned int dataoff,
	152	const char **dptr,
	153	unsigned int *datalen,
	154	unsigned int sdpoff,
	155	const union nf_inet_addr *addr);
	156
	157	unsigned int (sdp_media)(struct sk_buff skb,
	158	unsigned int protoff,
	159	unsigned int dataoff,
	160	const char **dptr,
	161	unsigned int *datalen,
	162	struct nf_conntrack_expect *rtp_exp,
	163	struct nf_conntrack_expect *rtcp_exp,
	164	unsigned int mediaoff,
	165	unsigned int medialen,
	166	union nf_inet_addr *rtp_addr);
	167	};
	168	extern const struct nf_nat_sip_hooks *nf_nat_sip_hooks;
9fafcd7b	169
a0f4ecf3 JP	170	int ct_sip_parse_request(const struct nf_conn ct, const char dptr,
	171	unsigned int datalen, unsigned int *matchoff,
	172	unsigned int matchlen, union nf_inet_addr addr,
	173	__be16 *port);
	174	int ct_sip_get_header(const struct nf_conn ct, const char dptr,
	175	unsigned int dataoff, unsigned int datalen,
	176	enum sip_header_types type, unsigned int *matchoff,
	177	unsigned int *matchlen);
	178	int ct_sip_parse_header_uri(const struct nf_conn ct, const char dptr,
	179	unsigned int *dataoff, unsigned int datalen,
	180	enum sip_header_types type, int *in_header,
	181	unsigned int matchoff, unsigned int matchlen,
	182	union nf_inet_addr addr, __be16 port);
	183	int ct_sip_parse_address_param(const struct nf_conn ct, const char dptr,
	184	unsigned int dataoff, unsigned int datalen,
	185	const char name, unsigned int matchoff,
	186	unsigned int matchlen, union nf_inet_addr addr,
	187	bool delim);
	188	int ct_sip_parse_numerical_param(const struct nf_conn ct, const char dptr,
	189	unsigned int off, unsigned int datalen,
	190	const char name, unsigned int matchoff,
	191	unsigned int matchen, unsigned int val);
	192
	193	int ct_sip_get_sdp_header(const struct nf_conn ct, const char dptr,
	194	unsigned int dataoff, unsigned int datalen,
	195	enum sdp_header_types type,
	196	enum sdp_header_types term,
	197	unsigned int matchoff, unsigned int matchlen);
3e9b4600	198
9fafcd7b PM	199	#endif /* __KERNEL__ */
9fafcd7b PM	200	#endif /* __NF_CONNTRACK_SIP_H__ */