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 ip_hdr {
  25         unsigned hdr_lngth:4 GNUNET_PACKED;
  26         unsigned version:4 GNUNET_PACKED;
  27
  28         unsigned diff_serv:8 GNUNET_PACKED;
  29         unsigned tot_lngth:16 GNUNET_PACKED;
  30
  31         unsigned ident:16 GNUNET_PACKED;
  32         unsigned flags:3 GNUNET_PACKED;
  33         unsigned frag_off:13 GNUNET_PACKED;
  34
  35         unsigned ttl:8 GNUNET_PACKED;
  36         unsigned proto:8 GNUNET_PACKED;
  37         unsigned chks:16 GNUNET_PACKED;
  38
  39         unsigned sadr:32 GNUNET_PACKED;
  40         unsigned dadr:32 GNUNET_PACKED;
  41 };
  42
  43 struct tcp_pkt {
  44         unsigned spt:16 GNUNET_PACKED;
  45         unsigned dpt:16 GNUNET_PACKED;
  46         unsigned seq:32 GNUNET_PACKED;
  47         unsigned ack:32 GNUNET_PACKED;
  48         unsigned off:4 GNUNET_PACKED;
  49         unsigned rsv:4 GNUNET_PACKED;
  50         unsigned flg:8 GNUNET_PACKED;
  51         unsigned wsz:16 GNUNET_PACKED;
  52         unsigned crc:16 GNUNET_PACKED;
  53         unsigned urg:16 GNUNET_PACKED;
  54 };
  55
  56 struct udp_pkt {
  57         unsigned spt:16 GNUNET_PACKED;
  58         unsigned dpt:16 GNUNET_PACKED;
  59         unsigned len:16 GNUNET_PACKED;
  60         unsigned crc:16 GNUNET_PACKED;
  61 };
  62
  63 // DNS-Stuff
  64 struct dns_static {
  65         unsigned short id GNUNET_PACKED;
  66
  67         unsigned rd:1 GNUNET_PACKED; // recursion desired (client -> server)
  68         unsigned tc:1 GNUNET_PACKED; // message is truncated
  69         unsigned aa:1 GNUNET_PACKED; // authoritative answer
  70         unsigned op:4 GNUNET_PACKED; // query:0, inverse q.:1, status: 2
  71         unsigned qr:1 GNUNET_PACKED; // query:0, response:1
  72
  73         unsigned rcode:4 GNUNET_PACKED; // 0 No error
  74                           // 1 Format error
  75                           // 2 Server failure
  76                           // 3 Name Error
  77                           // 4 Not Implemented
  78                           // 5 Refused
  79         unsigned z:3 GNUNET_PACKED;  // reserved
  80         unsigned ra:1 GNUNET_PACKED; // recursion available (server -> client)
  81
  82         unsigned short qdcount GNUNET_PACKED; // number of questions
  83         unsigned short ancount GNUNET_PACKED; // number of answers
  84         unsigned short nscount GNUNET_PACKED; // number of authority-records
  85         unsigned short arcount GNUNET_PACKED; // number of additional records
  86 };
  87
  88 struct dns_pkt {
  89         struct dns_static s;
  90         unsigned char data[1];
  91 };
  92
  93 struct dns_pkt_parsed {
  94         struct dns_static s;
  95         struct dns_query* queries;
  96         struct dns_record* answers;
  97         struct dns_record* nameservers;
  98         struct dns_record* additional;
  99 };
 100
 101 struct dns_query {
 102         unsigned char* name;
 103         unsigned short qtype;
 104         unsigned short qclass;
 105 };
 106
 107 struct dns_record {
 108         unsigned char* name;
 109         unsigned short type;
 110         unsigned short class;
 111         unsigned int ttl;
 112         unsigned short data_len;
 113         unsigned char* data;
 114 };
 115
 116 struct udp_dns {
 117         struct udp_pkt udp_hdr;
 118         struct dns_pkt data;
 119 };
 120
 121 // Complete Packets
 122 struct tun_pkt {
 123         struct GNUNET_MessageHeader shdr;
 124         struct pkt_tun tun;
 125 };
 126
 127 struct ip6_pkt {
 128         struct GNUNET_MessageHeader shdr;
 129         struct pkt_tun tun;
 130         struct ip6_hdr ip6_hdr;
 131         unsigned char data[1];
 132 };
 133
 134 struct ip6_tcp {
 135         struct GNUNET_MessageHeader shdr;
 136         struct pkt_tun tun;
 137         struct ip6_hdr ip6_hdr;
 138         struct tcp_pkt tcp_hdr;
 139         unsigned char data[1];
 140 };
 141
 142 struct ip6_udp {
 143         struct GNUNET_MessageHeader shdr;
 144         struct pkt_tun tun;
 145         struct ip6_hdr ip6_hdr;
 146         struct udp_pkt udp_hdr;
 147         unsigned char data[1];
 148 };
 149
 150 struct ip6_udp_dns {
 151         struct GNUNET_MessageHeader shdr;
 152         struct pkt_tun tun;
 153         struct ip6_hdr ip6_hdr;
 154         struct udp_dns udp_dns;
 155 };
 156
 157 struct ip_pkt {
 158         struct GNUNET_MessageHeader shdr;
 159         struct pkt_tun tun;
 160         struct ip_hdr ip_hdr;
 161         unsigned char data[1];
 162 };
 163
 164 struct ip_udp {
 165         struct GNUNET_MessageHeader shdr;
 166         struct pkt_tun tun;
 167         struct ip_hdr ip_hdr;
 168         struct udp_pkt udp_hdr;
 169         unsigned char data[1];
 170 };
 171 struct ip_udp_dns {
 172         struct GNUNET_MessageHeader shdr;
 173         struct pkt_tun tun;
 174         struct ip_hdr ip_hdr;
 175         struct udp_dns udp_dns;
 176 };
 177
 178 #endif