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![Jeremy Sowden](/assets/img/avatar_default.png)
A number of non-UAPI Netfilter header-files contained superfluous "#ifdef __KERNEL__" guards. Removed them. Signed-off-by: Jeremy Sowden <jeremy@azazel.net> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
198 lines
5.5 KiB
C
198 lines
5.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __NF_CONNTRACK_SIP_H__
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#define __NF_CONNTRACK_SIP_H__
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#include <linux/skbuff.h>
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#include <linux/types.h>
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#include <net/netfilter/nf_conntrack_expect.h>
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#define SIP_PORT 5060
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#define SIP_TIMEOUT 3600
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struct nf_ct_sip_master {
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unsigned int register_cseq;
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unsigned int invite_cseq;
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__be16 forced_dport;
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};
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enum sip_expectation_classes {
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SIP_EXPECT_SIGNALLING,
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SIP_EXPECT_AUDIO,
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SIP_EXPECT_VIDEO,
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SIP_EXPECT_IMAGE,
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__SIP_EXPECT_MAX
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};
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#define SIP_EXPECT_MAX (__SIP_EXPECT_MAX - 1)
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struct sdp_media_type {
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const char *name;
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unsigned int len;
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enum sip_expectation_classes class;
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};
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#define SDP_MEDIA_TYPE(__name, __class) \
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{ \
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.name = (__name), \
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.len = sizeof(__name) - 1, \
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.class = (__class), \
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}
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struct sip_handler {
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const char *method;
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unsigned int len;
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int (*request)(struct sk_buff *skb, unsigned int protoff,
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unsigned int dataoff,
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const char **dptr, unsigned int *datalen,
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unsigned int cseq);
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int (*response)(struct sk_buff *skb, unsigned int protoff,
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unsigned int dataoff,
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const char **dptr, unsigned int *datalen,
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unsigned int cseq, unsigned int code);
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};
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#define SIP_HANDLER(__method, __request, __response) \
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{ \
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.method = (__method), \
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.len = sizeof(__method) - 1, \
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.request = (__request), \
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.response = (__response), \
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}
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struct sip_header {
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const char *name;
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const char *cname;
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const char *search;
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unsigned int len;
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unsigned int clen;
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unsigned int slen;
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int (*match_len)(const struct nf_conn *ct,
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const char *dptr, const char *limit,
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int *shift);
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};
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#define __SIP_HDR(__name, __cname, __search, __match) \
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{ \
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.name = (__name), \
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.len = sizeof(__name) - 1, \
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.cname = (__cname), \
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.clen = (__cname) ? sizeof(__cname) - 1 : 0, \
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.search = (__search), \
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.slen = (__search) ? sizeof(__search) - 1 : 0, \
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.match_len = (__match), \
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}
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#define SIP_HDR(__name, __cname, __search, __match) \
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__SIP_HDR(__name, __cname, __search, __match)
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#define SDP_HDR(__name, __search, __match) \
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__SIP_HDR(__name, NULL, __search, __match)
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enum sip_header_types {
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SIP_HDR_CSEQ,
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SIP_HDR_FROM,
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SIP_HDR_TO,
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SIP_HDR_CONTACT,
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SIP_HDR_VIA_UDP,
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SIP_HDR_VIA_TCP,
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SIP_HDR_EXPIRES,
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SIP_HDR_CONTENT_LENGTH,
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SIP_HDR_CALL_ID,
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};
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enum sdp_header_types {
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SDP_HDR_UNSPEC,
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SDP_HDR_VERSION,
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SDP_HDR_OWNER,
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SDP_HDR_CONNECTION,
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SDP_HDR_MEDIA,
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};
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struct nf_nat_sip_hooks {
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unsigned int (*msg)(struct sk_buff *skb,
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unsigned int protoff,
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unsigned int dataoff,
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const char **dptr,
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unsigned int *datalen);
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void (*seq_adjust)(struct sk_buff *skb,
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unsigned int protoff, s16 off);
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unsigned int (*expect)(struct sk_buff *skb,
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unsigned int protoff,
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unsigned int dataoff,
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const char **dptr,
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unsigned int *datalen,
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struct nf_conntrack_expect *exp,
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unsigned int matchoff,
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unsigned int matchlen);
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unsigned int (*sdp_addr)(struct sk_buff *skb,
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unsigned int protoff,
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unsigned int dataoff,
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const char **dptr,
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unsigned int *datalen,
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unsigned int sdpoff,
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enum sdp_header_types type,
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enum sdp_header_types term,
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const union nf_inet_addr *addr);
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unsigned int (*sdp_port)(struct sk_buff *skb,
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unsigned int protoff,
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unsigned int dataoff,
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const char **dptr,
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unsigned int *datalen,
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unsigned int matchoff,
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unsigned int matchlen,
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u_int16_t port);
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unsigned int (*sdp_session)(struct sk_buff *skb,
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unsigned int protoff,
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unsigned int dataoff,
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const char **dptr,
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unsigned int *datalen,
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unsigned int sdpoff,
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const union nf_inet_addr *addr);
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unsigned int (*sdp_media)(struct sk_buff *skb,
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unsigned int protoff,
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unsigned int dataoff,
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const char **dptr,
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unsigned int *datalen,
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struct nf_conntrack_expect *rtp_exp,
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struct nf_conntrack_expect *rtcp_exp,
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unsigned int mediaoff,
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unsigned int medialen,
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union nf_inet_addr *rtp_addr);
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};
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extern const struct nf_nat_sip_hooks *nf_nat_sip_hooks;
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int ct_sip_parse_request(const struct nf_conn *ct, const char *dptr,
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unsigned int datalen, unsigned int *matchoff,
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unsigned int *matchlen, union nf_inet_addr *addr,
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__be16 *port);
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int ct_sip_get_header(const struct nf_conn *ct, const char *dptr,
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unsigned int dataoff, unsigned int datalen,
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enum sip_header_types type, unsigned int *matchoff,
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unsigned int *matchlen);
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int ct_sip_parse_header_uri(const struct nf_conn *ct, const char *dptr,
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unsigned int *dataoff, unsigned int datalen,
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enum sip_header_types type, int *in_header,
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unsigned int *matchoff, unsigned int *matchlen,
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union nf_inet_addr *addr, __be16 *port);
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int ct_sip_parse_address_param(const struct nf_conn *ct, const char *dptr,
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unsigned int dataoff, unsigned int datalen,
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const char *name, unsigned int *matchoff,
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unsigned int *matchlen, union nf_inet_addr *addr,
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bool delim);
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int ct_sip_parse_numerical_param(const struct nf_conn *ct, const char *dptr,
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unsigned int off, unsigned int datalen,
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const char *name, unsigned int *matchoff,
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unsigned int *matchen, unsigned int *val);
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int ct_sip_get_sdp_header(const struct nf_conn *ct, const char *dptr,
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unsigned int dataoff, unsigned int datalen,
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enum sdp_header_types type,
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enum sdp_header_types term,
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unsigned int *matchoff, unsigned int *matchlen);
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#endif /* __NF_CONNTRACK_SIP_H__ */
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