src/vpn/gnunet-vpn-packet.h

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