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1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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2 | #ifndef _NF_CONNTRACK_H323_H |
3 | #define _NF_CONNTRACK_H323_H |
4 | |
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> |
11 | |
12 | #define RAS_PORT 1719 |
13 | #define Q931_PORT 1720 |
14 | #define H323_RTP_CHANNEL_MAX 4 /* Audio, video, FAX and other */ |
15 | |
16 | /* This structure exists only once per master */ |
17 | struct nf_ct_h323_master { |
18 | |
19 | /* Original and NATed Q.931 or H.245 signal ports */ |
20 | __be16 sig_port[IP_CT_DIR_MAX]; |
21 | |
22 | /* Original and NATed RTP ports */ |
23 | __be16 rtp_port[H323_RTP_CHANNEL_MAX][IP_CT_DIR_MAX]; |
24 | |
25 | union { |
26 | /* RAS connection timeout */ |
27 | u_int32_t timeout; |
28 | |
29 | /* Next TPKT length (for separate TPKT header and data) */ |
30 | u_int16_t tpkt_len[IP_CT_DIR_MAX]; |
31 | }; |
32 | }; |
33 | |
34 | int get_h225_addr(struct nf_conn *ct, unsigned char *data, |
35 | TransportAddress *taddr, union nf_inet_addr *addr, |
36 | __be16 *port); |
37 | |
38 | struct nfct_h323_nat_hooks { |
39 | int (*set_h245_addr)(struct sk_buff *skb, unsigned int protoff, |
40 | unsigned char **data, int dataoff, |
41 | H245_TransportAddress *taddr, |
42 | union nf_inet_addr *addr, __be16 port); |
43 | int (*set_h225_addr)(struct sk_buff *skb, unsigned int protoff, |
44 | unsigned char **data, int dataoff, |
45 | TransportAddress *taddr, |
46 | union nf_inet_addr *addr, __be16 port); |
47 | int (*set_sig_addr)(struct sk_buff *skb, |
48 | struct nf_conn *ct, |
49 | enum ip_conntrack_info ctinfo, |
50 | unsigned int protoff, unsigned char **data, |
51 | TransportAddress *taddr, int count); |
52 | int (*set_ras_addr)(struct sk_buff *skb, |
53 | struct nf_conn *ct, |
54 | enum ip_conntrack_info ctinfo, |
55 | unsigned int protoff, unsigned char **data, |
56 | TransportAddress *taddr, int count); |
57 | int (*nat_rtp_rtcp)(struct sk_buff *skb, |
58 | struct nf_conn *ct, |
59 | enum ip_conntrack_info ctinfo, |
60 | unsigned int protoff, |
61 | unsigned char **data, int dataoff, |
62 | H245_TransportAddress *taddr, |
63 | __be16 port, __be16 rtp_port, |
64 | struct nf_conntrack_expect *rtp_exp, |
65 | struct nf_conntrack_expect *rtcp_exp); |
66 | int (*nat_t120)(struct sk_buff *skb, |
67 | struct nf_conn *ct, |
68 | enum ip_conntrack_info ctinfo, |
69 | unsigned int protoff, |
70 | unsigned char **data, int dataoff, |
71 | H245_TransportAddress *taddr, __be16 port, |
72 | struct nf_conntrack_expect *exp); |
73 | int (*nat_h245)(struct sk_buff *skb, |
74 | struct nf_conn *ct, |
75 | enum ip_conntrack_info ctinfo, |
76 | unsigned int protoff, |
77 | unsigned char **data, int dataoff, |
78 | TransportAddress *taddr, __be16 port, |
79 | struct nf_conntrack_expect *exp); |
80 | int (*nat_callforwarding)(struct sk_buff *skb, |
81 | struct nf_conn *ct, |
82 | enum ip_conntrack_info ctinfo, |
83 | unsigned int protoff, |
84 | unsigned char **data, int dataoff, |
85 | TransportAddress *taddr, __be16 port, |
86 | struct nf_conntrack_expect *exp); |
87 | int (*nat_q931)(struct sk_buff *skb, |
88 | struct nf_conn *ct, |
89 | enum ip_conntrack_info ctinfo, |
90 | unsigned int protoff, |
91 | unsigned char **data, TransportAddress *taddr, int idx, |
92 | __be16 port, struct nf_conntrack_expect *exp); |
93 | }; |
94 | extern const struct nfct_h323_nat_hooks __rcu *nfct_h323_nat_hook; |
95 | |
96 | #endif |
97 |
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