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