1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _NF_CONNTRACK_H323_H
3 #define _NF_CONNTRACK_H323_H
5 #include <linux/netfilter.h>
6 #include <linux/skbuff.h>
7 #include <linux/types.h>
8 #include <linux/netfilter/nf_conntrack_h323_asn1.h>
9 #include <net/netfilter/nf_conntrack_expect.h>
10 #include <uapi/linux/netfilter/nf_conntrack_tuple_common.h>
13 #define Q931_PORT 1720
14 #define H323_RTP_CHANNEL_MAX 4 /* Audio, video, FAX and other */
16 /* This structure exists only once per master */
17 struct nf_ct_h323_master {
19 /* Original and NATed Q.931 or H.245 signal ports */
20 __be16 sig_port[IP_CT_DIR_MAX];
22 /* Original and NATed RTP ports */
23 __be16 rtp_port[H323_RTP_CHANNEL_MAX][IP_CT_DIR_MAX];
26 /* RAS connection timeout */
29 /* Next TPKT length (for separate TPKT header and data) */
30 u_int16_t tpkt_len[IP_CT_DIR_MAX];
34 int get_h225_addr(struct nf_conn *ct, unsigned char *data,
35 TransportAddress *taddr, union nf_inet_addr *addr,
37 void nf_conntrack_h245_expect(struct nf_conn *new,
38 struct nf_conntrack_expect *this);
39 void nf_conntrack_q931_expect(struct nf_conn *new,
40 struct nf_conntrack_expect *this);
41 extern int (*set_h245_addr_hook) (struct sk_buff *skb, unsigned int protoff,
42 unsigned char **data, int dataoff,
43 H245_TransportAddress *taddr,
44 union nf_inet_addr *addr,
46 extern int (*set_h225_addr_hook) (struct sk_buff *skb, unsigned int protoff,
47 unsigned char **data, int dataoff,
48 TransportAddress *taddr,
49 union nf_inet_addr *addr,
51 extern int (*set_sig_addr_hook) (struct sk_buff *skb,
53 enum ip_conntrack_info ctinfo,
54 unsigned int protoff, unsigned char **data,
55 TransportAddress *taddr, int count);
56 extern int (*set_ras_addr_hook) (struct sk_buff *skb,
58 enum ip_conntrack_info ctinfo,
59 unsigned int protoff, unsigned char **data,
60 TransportAddress *taddr, int count);
61 extern int (*nat_rtp_rtcp_hook) (struct sk_buff *skb,
63 enum ip_conntrack_info ctinfo,
64 unsigned int protoff, unsigned char **data,
66 H245_TransportAddress *taddr,
67 __be16 port, __be16 rtp_port,
68 struct nf_conntrack_expect *rtp_exp,
69 struct nf_conntrack_expect *rtcp_exp);
70 extern int (*nat_t120_hook) (struct sk_buff *skb, struct nf_conn *ct,
71 enum ip_conntrack_info ctinfo,
73 unsigned char **data, int dataoff,
74 H245_TransportAddress *taddr, __be16 port,
75 struct nf_conntrack_expect *exp);
76 extern int (*nat_h245_hook) (struct sk_buff *skb, struct nf_conn *ct,
77 enum ip_conntrack_info ctinfo,
79 unsigned char **data, int dataoff,
80 TransportAddress *taddr, __be16 port,
81 struct nf_conntrack_expect *exp);
82 extern int (*nat_callforwarding_hook) (struct sk_buff *skb,
84 enum ip_conntrack_info ctinfo,
86 unsigned char **data, int dataoff,
87 TransportAddress *taddr,
89 struct nf_conntrack_expect *exp);
90 extern int (*nat_q931_hook) (struct sk_buff *skb, struct nf_conn *ct,
91 enum ip_conntrack_info ctinfo,
93 unsigned char **data, TransportAddress *taddr,
95 struct nf_conntrack_expect *exp);