input-ip6tun.h

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#ifndef _IP6TUN_H_
#define _IP6TUN_H_

#include <netinet/if_ether.h>


#ifdef DEBUG
#define DBG(format, ...) fprintf(stderr, format, ## __VA_ARGS__)
#else
#define DBG(format, ...) ;
#endif

#ifdef HANIC
#define BUFSIZE                                         2000
#endif

#ifdef IP6TUN_GEOIP
#define COUNTRY_CODE_LEN                        4
#endif

#define EXIT_TEREDO_TRAILER                     66

// value
#define IP6TUN_RECORD_INVALID           0x00000000

// mask
#define IP6TUN_RECORD_L3_PROTO          0x00000001
#define IP6TUN_RECORD_IPV6                      0x00000002
#define IP6TUN_RECORD_IPV4                      0x00000004
#define IP6TUN_RECORD_L4_PROTO          0x00000008
#define IP6TUN_RECORD_PORTS                     0x00000010
#define IP6TUN_RECORD_FLAGS                     0x00000020
#define IP6TUN_RECORD_ICMP                      0x00000040
#define IP6TUN_RECORD_TMECH                     0x00000080
#define IP6TUN_RECORD_TEREDO_HDR        0x00000100
#define IP6TUN_RECORD_TEREDO_TRL        0x00000200
#define IP6TUN_RECORD_GEOIP_REG         0x00000400
#define IP6TUN_RECORD_GEOIP_IP6TUN      0x00000800
#define IP6TUN_RECORD_TTL_HOP           0x00001000
#define IP6TUN_RECORD_HOP               0x00002000

#define IP6TUN_TMECH_NONE                       0x00
#define IP6TUN_TMECH_TEREDO                     0x01
#define IP6TUN_TMECH_ISATAP                     0x02
#define IP6TUN_TMECH_6TO4                       0x04
#define IP6TUN_TMECH_AYIYA                      0x08
#define IP6TUN_TMECH_OTHER41            0x10
#define IP6TUN_TMECH_6OVER4                     0x20

#define TEREDO_TRL_NONCE                        0x01
#define TEREDO_TRL_AADDR                        0x02
#define TEREDO_TRL_NDISC                        0x04
#define TEREDO_TRL_RPORT                        0x08

#define TEREDO_HDR_ORIG                         0x01
#define TEREDO_HDR_AUTH                         0x02

#define PCAP_SIZE                           1500

#define IPPROTO_41                                      41

#ifndef ETH_P_8021Q
#define ETH_P_8021Q                                     0x8100
#endif

#define ETH_P_ISMP                                      0x81FD

#ifndef ETH_P_MPLS_UC
#define ETH_P_MPLS_UC                           0x8847
#endif

#ifndef ETH_P_MPLS_MC
#define ETH_P_MPLS_MC                           0x8848
#endif

#define ETH_P_LLDP                                      0x88CC

#define _ETH_P_8021AD                           0x88A8
#define _ETH_P_8021QINQ                         0x9100
#define _ETH_P_8021QINQ_DOUBLE          0x9200
#define _ETH_P_8021QINQ_TRIPPLE         0x9300

#define VLAN_HLEN                                       4
#define VLAN_ID_MASK                            0xFF0F

#define MPLS_HLEN                                       4
#define MPLS_LABEL_SHIFT                        12
#define MPLS_STACK_MASK                         0xFF7F

#define AYIYA_PORT                                      5072
#define AYIYA_BASE_HLEN                         8
#define AYIYA_TIME_TOL                          120

#define TEREDO_AUTH_BASIC_HLEN          13
#define TEREDO_TRAILER_BASIC_LEN        2
#define TEREDO_ORIG_HLEN                        8
#define TEREDO_ORIG_PRE                         0x0000
#define TEREDO_ORIG_PRE_NO                      0x0000
#define TEREDO_AUTH_PRE                         0x0001
#define TEREDO_AUTH_PRE_NO                      0x0100
#define TEREDO_PREFIX                           0x2001
#define TEREDO_PREFIX_NO                        0x0120

#define ISATAP_MARK                             0x5EFE
#define ISATAP_MARK_NO                          0xFE5E

#define _6TO4_RELAY                                     0xC0586301 // 192.88.99.1 anycast, relay router
#define _6TO4_RELAY_NO                          0x58C00163
#define _6TO4_PREFIX                            0x2002
#define _6TO4_PREFIX_NO                         0x0220

#define _6OVER4_PREFIX                          0xFE80
#define _6OVER4_PREFIX_NO                       0x80FE

#define TCP_SPORT_OFFSET                        0
#define TCP_DPORT_OFFSET                        2
#define TCP_FLAGS_OFFSET                        13
#define TCP_DATA_OFFSET_OFFSET          12
#define TCP_DATA_OFFSET_SHIFT           4

#define IP_HLEN_MASK                            0x0F
#define IP_TTL_OFFSET                           0x08

#define IPV6_HLEN                                       40
#define IPV6_HOP_OFFSET                         0x07

#define IPV6_LL_MASK                            0xFE80
#define IPV6_LL_MASK_NO                         0x80FE



#define UDP_HLEN                                        8
#define UDP_DNS_PORT                            53


/* return values */
#define GET_FAILED                                      1

#define PARSE_FAILED                            0
#define PARSE_SUCCESS                           1

#define INIT_FAILED                                     0
#define INIT_SUCCESS                            1

#define VALIDITE_FAILED                         0
#define VALIDITE_SUCCESS                        1

/* time correction */
#define NSEC_IN_SEC                                     1000000000
#define NSEC_IN_USEC                            1000    

/* struct definitions */

struct __attribute__ ((packed)) ayiya_hdr {
        uint8_t idlen_idtype;
        uint8_t siglen_hshmeth;
        uint8_t autmeth_opcode;
        uint8_t next_header;
        uint32_t timestamp;
#define getidlen idlen_idtype >> 4
#define getidtype idlen_idtype & 0xF0 
#define getsiglen siglen_hshmeth >> 4
#define gethshmeth siglen_hshmeth & 0xF0 
#define getautmeth autmeth_opcode >> 4
#define getopcode autmeth_opcode & 0xF0 
};

struct __attribute__ ((packed)) teredo_orig_hdr {
        uint16_t        preamble;
        uint16_t        port;
        uint32_t        address;
};

struct __attribute__ ((packed)) teredo_basic_auth_hdr {
        uint16_t        preamble;
        uint8_t         idlen;
        uint8_t         aulen;
};

struct __attribute__ ((packed)) teredo_trailer_hdr {
        uint8_t         type;
        uint8_t         len;
};

#endif /* _IP6TUN_H_ */