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 #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 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,
  45                                   __be16 port);
  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,
  50                                   __be16 port);
  51 extern int (*set_sig_addr_hook) (struct sk_buff *skb,
  52                                  struct nf_conn *ct,
  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,
  57                                  struct nf_conn *ct,
  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,
  62                                  struct nf_conn *ct,
  63                                  enum ip_conntrack_info ctinfo,
  64                                  unsigned int protoff, unsigned char **data,
  65                                  int dataoff,
  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,
  72                              unsigned int protoff,
  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,
  78                              unsigned int protoff,
  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,
  83                                        struct nf_conn *ct,
  84                                        enum ip_conntrack_info ctinfo,
  85                                        unsigned int protoff,
  86                                        unsigned char **data, int dataoff,
  87                                        TransportAddress *taddr,
  88                                        __be16 port,
  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,
  92                              unsigned int protoff,
  93                              unsigned char **data, TransportAddress *taddr,
  94                              int idx, __be16 port,
  95                              struct nf_conntrack_expect *exp);
  96
  97 #endif