1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _NF_CONNTRACK_H323_H
3 #define _NF_CONNTRACK_H323_H
7 #include <linux/netfilter/nf_conntrack_h323_asn1.h>
10 #define Q931_PORT 1720
11 #define H323_RTP_CHANNEL_MAX 4 /* Audio, video, FAX and other */
13 /* This structure exists only once per master */
14 struct nf_ct_h323_master {
16 /* Original and NATed Q.931 or H.245 signal ports */
17 __be16 sig_port[IP_CT_DIR_MAX];
19 /* Original and NATed RTP ports */
20 __be16 rtp_port[H323_RTP_CHANNEL_MAX][IP_CT_DIR_MAX];
23 /* RAS connection timeout */
26 /* Next TPKT length (for separate TPKT header and data) */
27 u_int16_t tpkt_len[IP_CT_DIR_MAX];
33 int get_h225_addr(struct nf_conn *ct, unsigned char *data,
34 TransportAddress *taddr, union nf_inet_addr *addr,
36 void nf_conntrack_h245_expect(struct nf_conn *new,
37 struct nf_conntrack_expect *this);
38 void nf_conntrack_q931_expect(struct nf_conn *new,
39 struct nf_conntrack_expect *this);
40 extern int (*set_h245_addr_hook) (struct sk_buff *skb, unsigned int protoff,
41 unsigned char **data, int dataoff,
42 H245_TransportAddress *taddr,
43 union nf_inet_addr *addr,
45 extern int (*set_h225_addr_hook) (struct sk_buff *skb, unsigned int protoff,
46 unsigned char **data, int dataoff,
47 TransportAddress *taddr,
48 union nf_inet_addr *addr,
50 extern int (*set_sig_addr_hook) (struct sk_buff *skb,
52 enum ip_conntrack_info ctinfo,
53 unsigned int protoff, unsigned char **data,
54 TransportAddress *taddr, int count);
55 extern int (*set_ras_addr_hook) (struct sk_buff *skb,
57 enum ip_conntrack_info ctinfo,
58 unsigned int protoff, unsigned char **data,
59 TransportAddress *taddr, int count);
60 extern int (*nat_rtp_rtcp_hook) (struct sk_buff *skb,
62 enum ip_conntrack_info ctinfo,
63 unsigned int protoff, unsigned char **data,
65 H245_TransportAddress *taddr,
66 __be16 port, __be16 rtp_port,
67 struct nf_conntrack_expect *rtp_exp,
68 struct nf_conntrack_expect *rtcp_exp);
69 extern int (*nat_t120_hook) (struct sk_buff *skb, struct nf_conn *ct,
70 enum ip_conntrack_info ctinfo,
72 unsigned char **data, int dataoff,
73 H245_TransportAddress *taddr, __be16 port,
74 struct nf_conntrack_expect *exp);
75 extern int (*nat_h245_hook) (struct sk_buff *skb, struct nf_conn *ct,
76 enum ip_conntrack_info ctinfo,
78 unsigned char **data, int dataoff,
79 TransportAddress *taddr, __be16 port,
80 struct nf_conntrack_expect *exp);
81 extern int (*nat_callforwarding_hook) (struct sk_buff *skb,
83 enum ip_conntrack_info ctinfo,
85 unsigned char **data, int dataoff,
86 TransportAddress *taddr,
88 struct nf_conntrack_expect *exp);
89 extern int (*nat_q931_hook) (struct sk_buff *skb, struct nf_conn *ct,
90 enum ip_conntrack_info ctinfo,
92 unsigned char **data, TransportAddress *taddr,
94 struct nf_conntrack_expect *exp);