--- /dev/null
+#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__ */
Code Review / kvmfornfv.git / blobdiff