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         char* name;
 103         unsigned char namelen;
 104         unsigned short qtype;
 105         unsigned short qclass;
 106 };
 107
 108 struct dns_record {
 109         char* name;
 110         unsigned char namelen;
 111         unsigned short type;
 112         unsigned short class;
 113         unsigned int ttl;
 114         unsigned short data_len;
 115         unsigned char* data;
 116 };
 117
 118 struct udp_dns {
 119         struct udp_pkt udp_hdr;
 120         struct dns_pkt data;
 121 };
 122
 123 // Complete Packets
 124 struct tun_pkt {
 125         struct GNUNET_MessageHeader shdr;
 126         struct pkt_tun tun;
 127 };
 128
 129 struct ip6_pkt {
 130         struct GNUNET_MessageHeader shdr;
 131         struct pkt_tun tun;
 132         struct ip6_hdr ip6_hdr;
 133         unsigned char data[1];
 134 };
 135
 136 struct ip6_tcp {
 137         struct GNUNET_MessageHeader shdr;
 138         struct pkt_tun tun;
 139         struct ip6_hdr ip6_hdr;
 140         struct tcp_pkt tcp_hdr;
 141         unsigned char data[1];
 142 };
 143
 144 struct ip6_udp {
 145         struct GNUNET_MessageHeader shdr;
 146         struct pkt_tun tun;
 147         struct ip6_hdr ip6_hdr;
 148         struct udp_pkt udp_hdr;
 149         unsigned char data[1];
 150 };
 151
 152 struct ip6_udp_dns {
 153         struct GNUNET_MessageHeader shdr;
 154         struct pkt_tun tun;
 155         struct ip6_hdr ip6_hdr;
 156         struct udp_dns udp_dns;
 157 };
 158
 159 struct ip_pkt {
 160         struct GNUNET_MessageHeader shdr;
 161         struct pkt_tun tun;
 162         struct ip_hdr ip_hdr;
 163         unsigned char data[1];
 164 };
 165
 166 struct ip_udp {
 167         struct GNUNET_MessageHeader shdr;
 168         struct pkt_tun tun;
 169         struct ip_hdr ip_hdr;
 170         struct udp_pkt udp_hdr;
 171         unsigned char data[1];
 172 };
 173 struct ip_udp_dns {
 174         struct GNUNET_MessageHeader shdr;
 175         struct pkt_tun tun;
 176         struct ip_hdr ip_hdr;
 177         struct udp_dns udp_dns;
 178 };
 179
 180 #endif