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-rw-r--r--include/linux/netfilter/nf_conntrack_sip.h185
1 files changed, 156 insertions, 29 deletions
diff --git a/include/linux/netfilter/nf_conntrack_sip.h b/include/linux/netfilter/nf_conntrack_sip.h
index 8e5ce1ca7bfc..5da04e586a3f 100644
--- a/include/linux/netfilter/nf_conntrack_sip.h
+++ b/include/linux/netfilter/nf_conntrack_sip.h
@@ -5,37 +5,164 @@
#define SIP_PORT 5060
#define SIP_TIMEOUT 3600
-enum sip_header_pos {
- POS_REG_REQ_URI,
- POS_REQ_URI,
- POS_FROM,
- POS_TO,
- POS_VIA,
- POS_CONTACT,
- POS_CONTENT,
- POS_MEDIA,
- POS_OWNER_IP4,
- POS_CONNECTION_IP4,
- POS_OWNER_IP6,
- POS_CONNECTION_IP6,
- POS_SDP_HEADER,
+struct nf_ct_sip_master {
+ unsigned int register_cseq;
+};
+
+enum sip_expectation_classes {
+ SIP_EXPECT_SIGNALLING,
+ SIP_EXPECT_AUDIO,
+ SIP_EXPECT_VIDEO,
+ __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,
+ const char **dptr, unsigned int *datalen,
+ unsigned int cseq);
+ int (*response)(struct sk_buff *skb,
+ 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,
+ SIP_HDR_EXPIRES,
+ 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,
- enum ip_conntrack_info ctinfo,
- struct nf_conn *ct,
- const char **dptr);
-extern unsigned int (*nf_nat_sdp_hook)(struct sk_buff *skb,
- enum ip_conntrack_info ctinfo,
- struct nf_conntrack_expect *exp,
- const char *dptr);
-
-extern int ct_sip_get_info(const struct nf_conn *ct, const char *dptr,
- size_t dlen, unsigned int *matchoff,
- unsigned int *matchlen, enum sip_header_pos pos);
-extern int ct_sip_lnlen(const char *line, const char *limit);
-extern const char *ct_sip_search(const char *needle, const char *haystack,
- size_t needle_len, size_t haystack_len,
- int case_sensitive);
+ const char **dptr,
+ unsigned int *datalen);
+extern unsigned int (*nf_nat_sip_expect_hook)(struct sk_buff *skb,
+ 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,
+ const char **dptr,
+ unsigned int dataoff,
+ unsigned int *datalen,
+ 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,
+ 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,
+ const char **dptr,
+ unsigned int dataoff,
+ unsigned int *datalen,
+ const union nf_inet_addr *addr);
+extern unsigned int (*nf_nat_sdp_media_hook)(struct sk_buff *skb,
+ 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);
+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__ */
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.