| #ifndef __NF_CONNTRACK_SIP_H__ |
| #define __NF_CONNTRACK_SIP_H__ |
| #ifdef __KERNEL__ |
| |
| #define SIP_PORT 5060 |
| #define SIP_TIMEOUT 3600 |
| |
| struct nf_ct_sip_master { |
| unsigned int register_cseq; |
| unsigned int invite_cseq; |
| }; |
| |
| 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 dataoff, |
| const char **dptr, unsigned int *datalen, |
| unsigned int cseq); |
| int (*response)(struct sk_buff *skb, 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, |
| }; |
| |
| 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, |
| unsigned int dataoff, |
| const char **dptr, |
| unsigned int *datalen); |
| extern void (*nf_nat_sip_seq_adjust_hook)(struct sk_buff *skb, s16 off); |
| extern unsigned int (*nf_nat_sip_expect_hook)(struct sk_buff *skb, |
| unsigned int dataoff, |
| 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, |
| 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); |
| extern unsigned int (*nf_nat_sdp_port_hook)(struct sk_buff *skb, |
| unsigned int dataoff, |
| 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, |
| unsigned int dataoff, |
| const char **dptr, |
| unsigned int *datalen, |
| unsigned int sdpoff, |
| const union nf_inet_addr *addr); |
| extern unsigned int (*nf_nat_sdp_media_hook)(struct sk_buff *skb, |
| 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 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__ */ |