1 #ifndef __NF_CONNTRACK_SIP_H__
2 #define __NF_CONNTRACK_SIP_H__
5 #include <net/netfilter/nf_conntrack_expect.h>
7 #include <linux/types.h>
10 #define SIP_TIMEOUT 3600
12 struct nf_ct_sip_master
{
13 unsigned int register_cseq
;
14 unsigned int invite_cseq
;
18 enum sip_expectation_classes
{
19 SIP_EXPECT_SIGNALLING
,
25 #define SIP_EXPECT_MAX (__SIP_EXPECT_MAX - 1)
27 struct sdp_media_type
{
30 enum sip_expectation_classes
class;
33 #define SDP_MEDIA_TYPE(__name, __class) \
36 .len = sizeof(__name) - 1, \
43 int (*request
)(struct sk_buff
*skb
, unsigned int protoff
,
45 const char **dptr
, unsigned int *datalen
,
47 int (*response
)(struct sk_buff
*skb
, unsigned int protoff
,
49 const char **dptr
, unsigned int *datalen
,
50 unsigned int cseq
, unsigned int code
);
53 #define SIP_HANDLER(__method, __request, __response) \
55 .method = (__method), \
56 .len = sizeof(__method) - 1, \
57 .request = (__request), \
58 .response = (__response), \
68 int (*match_len
)(const struct nf_conn
*ct
,
69 const char *dptr
, const char *limit
,
73 #define __SIP_HDR(__name, __cname, __search, __match) \
76 .len = sizeof(__name) - 1, \
78 .clen = (__cname) ? sizeof(__cname) - 1 : 0, \
79 .search = (__search), \
80 .slen = (__search) ? sizeof(__search) - 1 : 0, \
81 .match_len = (__match), \
84 #define SIP_HDR(__name, __cname, __search, __match) \
85 __SIP_HDR(__name, __cname, __search, __match)
87 #define SDP_HDR(__name, __search, __match) \
88 __SIP_HDR(__name, NULL, __search, __match)
90 enum sip_header_types
{
98 SIP_HDR_CONTENT_LENGTH
,
102 enum sdp_header_types
{
110 struct nf_nat_sip_hooks
{
111 unsigned int (*msg
)(struct sk_buff
*skb
,
112 unsigned int protoff
,
113 unsigned int dataoff
,
115 unsigned int *datalen
);
117 void (*seq_adjust
)(struct sk_buff
*skb
,
118 unsigned int protoff
, s16 off
);
120 unsigned int (*expect
)(struct sk_buff
*skb
,
121 unsigned int protoff
,
122 unsigned int dataoff
,
124 unsigned int *datalen
,
125 struct nf_conntrack_expect
*exp
,
126 unsigned int matchoff
,
127 unsigned int matchlen
);
129 unsigned int (*sdp_addr
)(struct sk_buff
*skb
,
130 unsigned int protoff
,
131 unsigned int dataoff
,
133 unsigned int *datalen
,
135 enum sdp_header_types type
,
136 enum sdp_header_types term
,
137 const union nf_inet_addr
*addr
);
139 unsigned int (*sdp_port
)(struct sk_buff
*skb
,
140 unsigned int protoff
,
141 unsigned int dataoff
,
143 unsigned int *datalen
,
144 unsigned int matchoff
,
145 unsigned int matchlen
,
148 unsigned int (*sdp_session
)(struct sk_buff
*skb
,
149 unsigned int protoff
,
150 unsigned int dataoff
,
152 unsigned int *datalen
,
154 const union nf_inet_addr
*addr
);
156 unsigned int (*sdp_media
)(struct sk_buff
*skb
,
157 unsigned int protoff
,
158 unsigned int dataoff
,
160 unsigned int *datalen
,
161 struct nf_conntrack_expect
*rtp_exp
,
162 struct nf_conntrack_expect
*rtcp_exp
,
163 unsigned int mediaoff
,
164 unsigned int medialen
,
165 union nf_inet_addr
*rtp_addr
);
167 extern const struct nf_nat_sip_hooks
*nf_nat_sip_hooks
;
169 int ct_sip_parse_request(const struct nf_conn
*ct
, const char *dptr
,
170 unsigned int datalen
, unsigned int *matchoff
,
171 unsigned int *matchlen
, union nf_inet_addr
*addr
,
173 int ct_sip_get_header(const struct nf_conn
*ct
, const char *dptr
,
174 unsigned int dataoff
, unsigned int datalen
,
175 enum sip_header_types type
, unsigned int *matchoff
,
176 unsigned int *matchlen
);
177 int ct_sip_parse_header_uri(const struct nf_conn
*ct
, const char *dptr
,
178 unsigned int *dataoff
, unsigned int datalen
,
179 enum sip_header_types type
, int *in_header
,
180 unsigned int *matchoff
, unsigned int *matchlen
,
181 union nf_inet_addr
*addr
, __be16
*port
);
182 int ct_sip_parse_address_param(const struct nf_conn
*ct
, const char *dptr
,
183 unsigned int dataoff
, unsigned int datalen
,
184 const char *name
, unsigned int *matchoff
,
185 unsigned int *matchlen
, union nf_inet_addr
*addr
,
187 int ct_sip_parse_numerical_param(const struct nf_conn
*ct
, const char *dptr
,
188 unsigned int off
, unsigned int datalen
,
189 const char *name
, unsigned int *matchoff
,
190 unsigned int *matchen
, unsigned int *val
);
192 int ct_sip_get_sdp_header(const struct nf_conn
*ct
, const char *dptr
,
193 unsigned int dataoff
, unsigned int datalen
,
194 enum sdp_header_types type
,
195 enum sdp_header_types term
,
196 unsigned int *matchoff
, unsigned int *matchlen
);
198 #endif /* __KERNEL__ */
199 #endif /* __NF_CONNTRACK_SIP_H__ */