src/vpn/gnunet-vpn-packet.h

   1 #ifndef _GNTUN_PACKET_H_
   2 #define _GNTUN_PACKET_H_
   3
   4 #include "gnunet-vpn-helper-p.h"
   5 #include "gnunet_common.h"
   6
   7 // Headers
   8 struct pkt_tun {
   9         unsigned flags:16 GNUNET_PACKED;
  10         unsigned type:16 GNUNET_PACKED;
  11 };
  12
  13 struct ip6_hdr {
  14         unsigned version:4 GNUNET_PACKED;
  15         unsigned tclass:8 GNUNET_PACKED;
  16         unsigned flowlbl:20 GNUNET_PACKED;
  17         unsigned paylgth:16 GNUNET_PACKED;
  18         unsigned nxthdr:8 GNUNET_PACKED;
  19         unsigned hoplmt:8 GNUNET_PACKED;
  20         unsigned char sadr[16];
  21         unsigned char dadr[16];
  22 };
  23
  24 struct tcp_pkt {
  25         unsigned spt:16 GNUNET_PACKED;
  26         unsigned dpt:16 GNUNET_PACKED;
  27         unsigned seq:32 GNUNET_PACKED;
  28         unsigned ack:32 GNUNET_PACKED;
  29         unsigned off:4 GNUNET_PACKED;
  30         unsigned rsv:4 GNUNET_PACKED;
  31         unsigned flg:8 GNUNET_PACKED;
  32         unsigned wsz:16 GNUNET_PACKED;
  33         unsigned crc:16 GNUNET_PACKED;
  34         unsigned urg:16 GNUNET_PACKED;
  35 };
  36
  37 struct udp_pkt {
  38         unsigned spt:16 GNUNET_PACKED;
  39         unsigned dpt:16 GNUNET_PACKED;
  40         unsigned len:16 GNUNET_PACKED;
  41         unsigned crc:16 GNUNET_PACKED;
  42 };
  43
  44 // DNS-Stuff
  45 struct dns_pkt {
  46         unsigned short id GNUNET_PACKED;
  47
  48         unsigned rd:1 GNUNET_PACKED; // recursion desired (client -> server)
  49         unsigned tc:1 GNUNET_PACKED; // message is truncated
  50         unsigned aa:1 GNUNET_PACKED; // authoritative answer
  51         unsigned op:4 GNUNET_PACKED; // query:0, inverse q.:1, status: 2
  52         unsigned qr:1 GNUNET_PACKED; // query:0, response:1
  53
  54         unsigned rcode:4 GNUNET_PACKED; // 0 No error
  55                           // 1 Format error
  56                           // 2 Server failure
  57                           // 3 Name Error
  58                           // 4 Not Implemented
  59                           // 5 Refused
  60         unsigned z:3 GNUNET_PACKED;  // reserved
  61         unsigned ra:1 GNUNET_PACKED; // recursion available (server -> client)
  62
  63         unsigned short qdcount GNUNET_PACKED; // number of questions
  64         unsigned short ancount GNUNET_PACKED; // number of answers
  65         unsigned short nscount GNUNET_PACKED; // number of authority-records
  66         unsigned short arcount GNUNET_PACKED; // number of additional records
  67         unsigned char data[1];
  68 };
  69
  70 struct dns_query {
  71         unsigned char* name;
  72         unsigned short qtype;
  73         unsigned short qclass;
  74 };
  75
  76 struct dns_record {
  77         unsigned char* name;
  78         unsigned short type;
  79         unsigned short class;
  80         unsigned int ttl;
  81         unsigned short data_len;
  82         unsigned char* data;
  83 };
  84
  85 // Complete Packets
  86 struct ip6_pkt {
  87         struct GNUNET_MessageHeader shdr;
  88         struct pkt_tun tun;
  89         struct ip6_hdr ip6_hdr;
  90         unsigned char data[1];
  91 };
  92
  93 struct ip6_tcp {
  94         struct GNUNET_MessageHeader shdr;
  95         struct pkt_tun tun;
  96         struct ip6_hdr ip6_hdr;
  97         struct tcp_pkt tcp_hdr;
  98         unsigned char data[1];
  99 };
 100
 101 struct ip6_udp {
 102         struct GNUNET_MessageHeader shdr;
 103         struct pkt_tun tun;
 104         struct ip6_hdr ip6_hdr;
 105         struct udp_pkt udp_hdr;
 106         unsigned char data[1];
 107 };
 108
 109 struct ip6_udp_dns {
 110         struct GNUNET_MessageHeader shdr;
 111         struct pkt_tun tun;
 112         struct ip6_hdr ip6_hdr;
 113         struct udp_pkt udp_hdr;
 114         struct dns_pkt data;
 115 };
 116
 117 #endif