src/vpn/gnunet-vpn-packet.h

   1 #ifndef _GNTUN_PACKET_H_
   2 #define _GNTUN_PACKET_H_
   3
   4 #include "gnunet_common.h"
   5
   6 // Headers
   7 struct pkt_tun {
   8         unsigned flags:16 GNUNET_PACKED;
   9         unsigned type:16 GNUNET_PACKED;
  10 };
  11
  12 struct ip6_hdr {
  13         unsigned tclass_h:4 GNUNET_PACKED;
  14         unsigned version:4 GNUNET_PACKED;
  15         unsigned tclass_l:4 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 struct icmp_hdr {
  64     unsigned type:8 GNUNET_PACKED;
  65     unsigned code:8 GNUNET_PACKED;
  66     unsigned chks:16 GNUNET_PACKED;
  67 };
  68
  69 // DNS-Stuff
  70 struct dns_static {
  71         unsigned short id GNUNET_PACKED;
  72
  73         unsigned rd:1 GNUNET_PACKED; // recursion desired (client -> server)
  74         unsigned tc:1 GNUNET_PACKED; // message is truncated
  75         unsigned aa:1 GNUNET_PACKED; // authoritative answer
  76         unsigned op:4 GNUNET_PACKED; // query:0, inverse q.:1, status: 2
  77         unsigned qr:1 GNUNET_PACKED; // query:0, response:1
  78
  79         unsigned rcode:4 GNUNET_PACKED; // 0 No error
  80                           // 1 Format error
  81                           // 2 Server failure
  82                           // 3 Name Error
  83                           // 4 Not Implemented
  84                           // 5 Refused
  85         unsigned z:3 GNUNET_PACKED;  // reserved
  86         unsigned ra:1 GNUNET_PACKED; // recursion available (server -> client)
  87
  88         unsigned short qdcount GNUNET_PACKED; // number of questions
  89         unsigned short ancount GNUNET_PACKED; // number of answers
  90         unsigned short nscount GNUNET_PACKED; // number of authority-records
  91         unsigned short arcount GNUNET_PACKED; // number of additional records
  92 };
  93
  94 struct dns_pkt {
  95         struct dns_static s;
  96         unsigned char data[1];
  97 };
  98
  99 struct dns_pkt_parsed {
 100         struct dns_static s;
 101         struct dns_query** queries;
 102         struct dns_record** answers;
 103         struct dns_record** nameservers;
 104         struct dns_record** additional;
 105 };
 106
 107 struct dns_query_line {
 108     unsigned short type;
 109     unsigned short class;
 110 };
 111
 112 struct dns_query {
 113         char* name;
 114         unsigned char namelen;
 115         unsigned short qtype;
 116         unsigned short qclass;
 117 };
 118
 119 struct dns_record_line {
 120     unsigned short type;
 121     unsigned short class;
 122     unsigned int ttl;
 123     unsigned short data_len;
 124     unsigned char data;
 125 };
 126
 127 struct dns_record {
 128         char* name;
 129         unsigned char namelen;
 130         unsigned short type;
 131         unsigned short class;
 132         unsigned int ttl;
 133         unsigned short data_len;
 134         unsigned char* data;
 135 };
 136
 137 struct udp_dns {
 138         struct udp_pkt udp_hdr;
 139         struct dns_pkt data;
 140 };
 141
 142 // Complete Packets
 143 struct tun_pkt {
 144         struct GNUNET_MessageHeader shdr;
 145         struct pkt_tun tun;
 146 };
 147
 148 struct ip6_pkt {
 149         struct GNUNET_MessageHeader shdr;
 150         struct pkt_tun tun;
 151         struct ip6_hdr ip6_hdr;
 152         unsigned char data[1];
 153 };
 154
 155 struct ip6_tcp {
 156         struct GNUNET_MessageHeader shdr;
 157         struct pkt_tun tun;
 158         struct ip6_hdr ip6_hdr;
 159         struct tcp_pkt tcp_hdr;
 160         unsigned char data[1];
 161 };
 162
 163 struct ip6_icmp {
 164     struct GNUNET_MessageHeader shdr;
 165     struct pkt_tun tun;
 166     struct ip6_hdr ip6_hdr;
 167     struct icmp_hdr icmp_hdr;
 168 };
 169
 170 struct ip6_udp {
 171         struct GNUNET_MessageHeader shdr;
 172         struct pkt_tun tun;
 173         struct ip6_hdr ip6_hdr;
 174         struct udp_pkt udp_hdr;
 175         unsigned char data[1];
 176 };
 177
 178 struct ip6_udp_dns {
 179         struct GNUNET_MessageHeader shdr;
 180         struct pkt_tun tun;
 181         struct ip6_hdr ip6_hdr;
 182         struct udp_dns udp_dns;
 183 };
 184
 185 struct ip_pkt {
 186         struct GNUNET_MessageHeader shdr;
 187         struct pkt_tun tun;
 188         struct ip_hdr ip_hdr;
 189         unsigned char data[1];
 190 };
 191
 192 struct ip_udp {
 193         struct GNUNET_MessageHeader shdr;
 194         struct pkt_tun tun;
 195         struct ip_hdr ip_hdr;
 196         struct udp_pkt udp_hdr;
 197         unsigned char data[1];
 198 };
 199 struct ip_udp_dns {
 200         struct GNUNET_MessageHeader shdr;
 201         struct pkt_tun tun;
 202         struct ip_hdr ip_hdr;
 203         struct udp_dns udp_dns;
 204 };
 205
 206 #endif