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#ifndef _GNTUN_PACKET_H_
#define _GNTUN_PACKET_H_
#include "gnunet-vpn-helper-p.h"
// Headers
struct pkt_tun {
unsigned flags:16;
unsigned type:16;
};
struct ip6_hdr {
unsigned version:4;
unsigned tclass:8;
unsigned flowlbl:20;
unsigned paylgth:16;
unsigned nxthdr:8;
unsigned hoplmt:8;
unsigned char sadr[16];
unsigned char dadr[16];
};
struct tcp_pkt {
unsigned spt:16;
unsigned dpt:16;
unsigned seq:32;
unsigned ack:32;
unsigned off:4;
unsigned rsv:4;
unsigned flg:8;
unsigned wsz:16;
unsigned crc:16;
unsigned urg:16;
};
struct udp_pkt {
unsigned spt:16;
unsigned dpt:16;
unsigned len:16;
unsigned crc:16;
};
// DNS-Stuff
struct dns_pkt {
unsigned short id;
unsigned rd:1; // recursion desired (client -> server)
unsigned tc:1; // message is truncated
unsigned aa:1; // authoritative answer
unsigned op:4; // query:0, inverse q.:1, status: 2
unsigned qr:1; // query:0, response:1
unsigned rcode:4; // 0 No error
// 1 Format error
// 2 Server failure
// 3 Name Error
// 4 Not Implemented
// 5 Refused
unsigned z:3; // reserved
unsigned ra:1; // recursion available (server -> client)
unsigned short qdcount; // number of questions
unsigned short ancount; // number of answers
unsigned short nscount; // number of authority-records
unsigned short arcount; // number of additional records
unsigned char data[1];
};
struct dns_query {
unsigned char* name;
unsigned short qtype;
unsigned short qclass;
};
struct dns_record {
unsigned char* name;
unsigned short type;
unsigned short class;
unsigned int ttl;
unsigned short data_len;
unsigned char* data;
};
// Complete Packets
struct ip6_pkt {
struct suid_packet_header shdr;
struct pkt_tun tun;
struct ip6_hdr ip6_hdr;
unsigned char data[1];
};
struct ip6_tcp {
struct suid_packet_header shdr;
struct pkt_tun tun;
struct ip6_hdr ip6_hdr;
struct tcp_pkt tcp_hdr;
unsigned char data[1];
};
struct ip6_udp {
struct suid_packet_header shdr;
struct pkt_tun tun;
struct ip6_hdr ip6_hdr;
struct udp_pkt udp_hdr;
unsigned char data[1];
};
struct ip6_udp_dns {
struct suid_packet_header shdr;
struct pkt_tun tun;
struct ip6_hdr ip6_hdr;
struct udp_pkt udp_hdr;
struct dns_pkt data;
};
#endif
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