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 tclass_h:4 GNUNET_PACKED;
  15         unsigned version:4 GNUNET_PACKED;
  16         unsigned tclass_l:4 GNUNET_PACKED;
  17         unsigned flowlbl:20 GNUNET_PACKED;
  18         unsigned paylgth:16 GNUNET_PACKED;
  19         unsigned nxthdr:8 GNUNET_PACKED;
  20         unsigned hoplmt:8 GNUNET_PACKED;
  21         unsigned char sadr[16];
  22         unsigned char dadr[16];
  23 };
  24
  25 struct ip_hdr {
  26         unsigned hdr_lngth:4 GNUNET_PACKED;
  27         unsigned version:4 GNUNET_PACKED;
  28
  29         unsigned diff_serv:8 GNUNET_PACKED;
  30         unsigned tot_lngth:16 GNUNET_PACKED;
  31
  32         unsigned ident:16 GNUNET_PACKED;
  33         unsigned flags:3 GNUNET_PACKED;
  34         unsigned frag_off:13 GNUNET_PACKED;
  35
  36         unsigned ttl:8 GNUNET_PACKED;
  37         unsigned proto:8 GNUNET_PACKED;
  38         unsigned chks:16 GNUNET_PACKED;
  39
  40         unsigned sadr:32 GNUNET_PACKED;
  41         unsigned dadr:32 GNUNET_PACKED;
  42 };
  43
  44 struct tcp_pkt {
  45         unsigned spt:16 GNUNET_PACKED;
  46         unsigned dpt:16 GNUNET_PACKED;
  47         unsigned seq:32 GNUNET_PACKED;
  48         unsigned ack:32 GNUNET_PACKED;
  49         unsigned off:4 GNUNET_PACKED;
  50         unsigned rsv:4 GNUNET_PACKED;
  51         unsigned flg:8 GNUNET_PACKED;
  52         unsigned wsz:16 GNUNET_PACKED;
  53         unsigned crc:16 GNUNET_PACKED;
  54         unsigned urg:16 GNUNET_PACKED;
  55 };
  56
  57 struct udp_pkt {
  58         unsigned spt:16 GNUNET_PACKED;
  59         unsigned dpt:16 GNUNET_PACKED;
  60         unsigned len:16 GNUNET_PACKED;
  61         unsigned crc:16 GNUNET_PACKED;
  62 };
  63
  64 // DNS-Stuff
  65 struct dns_static {
  66         unsigned short id GNUNET_PACKED;
  67
  68         unsigned rd:1 GNUNET_PACKED; // recursion desired (client -> server)
  69         unsigned tc:1 GNUNET_PACKED; // message is truncated
  70         unsigned aa:1 GNUNET_PACKED; // authoritative answer
  71         unsigned op:4 GNUNET_PACKED; // query:0, inverse q.:1, status: 2
  72         unsigned qr:1 GNUNET_PACKED; // query:0, response:1
  73
  74         unsigned rcode:4 GNUNET_PACKED; // 0 No error
  75                           // 1 Format error
  76                           // 2 Server failure
  77                           // 3 Name Error
  78                           // 4 Not Implemented
  79                           // 5 Refused
  80         unsigned z:3 GNUNET_PACKED;  // reserved
  81         unsigned ra:1 GNUNET_PACKED; // recursion available (server -> client)
  82
  83         unsigned short qdcount GNUNET_PACKED; // number of questions
  84         unsigned short ancount GNUNET_PACKED; // number of answers
  85         unsigned short nscount GNUNET_PACKED; // number of authority-records
  86         unsigned short arcount GNUNET_PACKED; // number of additional records
  87 };
  88
  89 struct dns_pkt {
  90         struct dns_static s;
  91         unsigned char data[1];
  92 };
  93
  94 struct dns_pkt_parsed {
  95         struct dns_static s;
  96         struct dns_query** queries;
  97         struct dns_record** answers;
  98         struct dns_record** nameservers;
  99         struct dns_record** additional;
 100 };
 101
 102 struct dns_query_line {
 103     unsigned short type;
 104     unsigned short class;
 105 };
 106
 107 struct dns_query {
 108         char* name;
 109         unsigned char namelen;
 110         unsigned short qtype;
 111         unsigned short qclass;
 112 };
 113
 114 struct dns_record_line {
 115     unsigned short type;
 116     unsigned short class;
 117     unsigned int ttl;
 118     unsigned short data_len;
 119     unsigned char data;
 120 };
 121
 122 struct dns_record {
 123         char* name;
 124         unsigned char namelen;
 125         unsigned short type;
 126         unsigned short class;
 127         unsigned int ttl;
 128         unsigned short data_len;
 129         unsigned char* data;
 130 };
 131
 132 struct udp_dns {
 133         struct udp_pkt udp_hdr;
 134         struct dns_pkt data;
 135 };
 136
 137 // Complete Packets
 138 struct tun_pkt {
 139         struct GNUNET_MessageHeader shdr;
 140         struct pkt_tun tun;
 141 };
 142
 143 struct ip6_pkt {
 144         struct GNUNET_MessageHeader shdr;
 145         struct pkt_tun tun;
 146         struct ip6_hdr ip6_hdr;
 147         unsigned char data[1];
 148 };
 149
 150 struct ip6_tcp {
 151         struct GNUNET_MessageHeader shdr;
 152         struct pkt_tun tun;
 153         struct ip6_hdr ip6_hdr;
 154         struct tcp_pkt tcp_hdr;
 155         unsigned char data[1];
 156 };
 157
 158 struct ip6_udp {
 159         struct GNUNET_MessageHeader shdr;
 160         struct pkt_tun tun;
 161         struct ip6_hdr ip6_hdr;
 162         struct udp_pkt udp_hdr;
 163         unsigned char data[1];
 164 };
 165
 166 struct ip6_udp_dns {
 167         struct GNUNET_MessageHeader shdr;
 168         struct pkt_tun tun;
 169         struct ip6_hdr ip6_hdr;
 170         struct udp_dns udp_dns;
 171 };
 172
 173 struct ip_pkt {
 174         struct GNUNET_MessageHeader shdr;
 175         struct pkt_tun tun;
 176         struct ip_hdr ip_hdr;
 177         unsigned char data[1];
 178 };
 179
 180 struct ip_udp {
 181         struct GNUNET_MessageHeader shdr;
 182         struct pkt_tun tun;
 183         struct ip_hdr ip_hdr;
 184         struct udp_pkt udp_hdr;
 185         unsigned char data[1];
 186 };
 187 struct ip_udp_dns {
 188         struct GNUNET_MessageHeader shdr;
 189         struct pkt_tun tun;
 190         struct ip_hdr ip_hdr;
 191         struct udp_dns udp_dns;
 192 };
 193
 194 #endif