include/linux/netfilter/nf_conntrack_h323.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _NF_CONNTRACK_H323_H
   3 #define _NF_CONNTRACK_H323_H
   4
   5 #ifdef __KERNEL__
   6
   7 #include <linux/netfilter/nf_conntrack_h323_asn1.h>
   8
   9 #define RAS_PORT 1719
  10 #define Q931_PORT 1720
  11 #define H323_RTP_CHANNEL_MAX 4  /* Audio, video, FAX and other */
  12
  13 /* This structure exists only once per master */
  14 struct nf_ct_h323_master {
  15
  16         /* Original and NATed Q.931 or H.245 signal ports */
  17         __be16 sig_port[IP_CT_DIR_MAX];
  18
  19         /* Original and NATed RTP ports */
  20         __be16 rtp_port[H323_RTP_CHANNEL_MAX][IP_CT_DIR_MAX];
  21
  22         union {
  23                 /* RAS connection timeout */
  24                 u_int32_t timeout;
  25
  26                 /* Next TPKT length (for separate TPKT header and data) */
  27                 u_int16_t tpkt_len[IP_CT_DIR_MAX];
  28         };
  29 };
  30
  31 struct nf_conn;
  32
  33 int get_h225_addr(struct nf_conn *ct, unsigned char *data,
  34                   TransportAddress *taddr, union nf_inet_addr *addr,
  35                   __be16 *port);
  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,
  44                                   __be16 port);
  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,
  49                                   __be16 port);
  50 extern int (*set_sig_addr_hook) (struct sk_buff *skb,
  51                                  struct nf_conn *ct,
  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,
  56                                  struct nf_conn *ct,
  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,
  61                                  struct nf_conn *ct,
  62                                  enum ip_conntrack_info ctinfo,
  63                                  unsigned int protoff, unsigned char **data,
  64                                  int dataoff,
  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,
  71                              unsigned int protoff,
  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,
  77                              unsigned int protoff,
  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,
  82                                        struct nf_conn *ct,
  83                                        enum ip_conntrack_info ctinfo,
  84                                        unsigned int protoff,
  85                                        unsigned char **data, int dataoff,
  86                                        TransportAddress *taddr,
  87                                        __be16 port,
  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,
  91                              unsigned int protoff,
  92                              unsigned char **data, TransportAddress *taddr,
  93                              int idx, __be16 port,
  94                              struct nf_conntrack_expect *exp);
  95
  96 #endif
  97
  98 #endif