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authorPatrick McHardy <kaber@trash.net>2006-05-29 18:27:09 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2006-06-17 21:29:15 -0700
commitae5b7d8ba2c28d7d9835856fe0ca5f6ec95ea768 (patch)
tree54de467b6ee9344a51c8b254be3da933b57cc531 /include/linux/netfilter_ipv4
parente44ab66a75e20c02193440a5e27c16c91630109b (diff)
[NETFILTER]: Add SIP connection tracking helper
Add SIP connection tracking helper. Originally written by Christian Hentschel <chentschel@arnet.com.ar>, some cleanup, minor fixes and bidirectional SIP support added by myself. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/netfilter_ipv4')
-rw-r--r--include/linux/netfilter_ipv4/ip_conntrack_sip.h44
1 files changed, 44 insertions, 0 deletions
diff --git a/include/linux/netfilter_ipv4/ip_conntrack_sip.h b/include/linux/netfilter_ipv4/ip_conntrack_sip.h
new file mode 100644
index 000000000000..913dad66c0fb
--- /dev/null
+++ b/include/linux/netfilter_ipv4/ip_conntrack_sip.h
@@ -0,0 +1,44 @@
+#ifndef __IP_CONNTRACK_SIP_H__
+#define __IP_CONNTRACK_SIP_H__
+#ifdef __KERNEL__
+
+#define SIP_PORT 5060
+#define SIP_TIMEOUT 3600
+
+#define POS_VIA 0
+#define POS_CONTACT 1
+#define POS_CONTENT 2
+#define POS_MEDIA 3
+#define POS_OWNER 4
+#define POS_CONNECTION 5
+#define POS_REQ_HEADER 6
+#define POS_SDP_HEADER 7
+
+struct sip_header_nfo {
+ const char *lname;
+ const char *sname;
+ const char *ln_str;
+ size_t lnlen;
+ size_t snlen;
+ size_t ln_strlen;
+ int (*match_len)(const char *, const char *, int *);
+};
+
+extern unsigned int (*ip_nat_sip_hook)(struct sk_buff **pskb,
+ enum ip_conntrack_info ctinfo,
+ struct ip_conntrack *ct,
+ const char **dptr);
+extern unsigned int (*ip_nat_sdp_hook)(struct sk_buff **pskb,
+ enum ip_conntrack_info ctinfo,
+ struct ip_conntrack_expect *exp,
+ const char *dptr);
+
+extern int ct_sip_get_info(const char *dptr, size_t dlen,
+ unsigned int *matchoff,
+ unsigned int *matchlen,
+ struct sip_header_nfo *hnfo);
+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);
+#endif /* __KERNEL__ */
+#endif /* __IP_CONNTRACK_SIP_H__ */