vpn: Packet-Structure for udp and dns over ipv6

1 files changed, 36 insertions, 0 deletions

diff --git a/src/vpn/packet.h b/src/vpn/packet.h
index fa3c8f38c..84169b531 100644
--- a/src/vpn/packet.h
+++ b/src/vpn/packet.h
@@ -31,6 +31,36 @@ struct tcp_pkt {
         unsigned char data[1];
 };
 
+struct udp_pkt {
+        unsigned spt:16;
+        unsigned dpt:16;
+        unsigned len:16;
+        unsigned crc:16;
+}
+
+struct dns_pkt {
+        unsigned id:16;
+        unsigned qr:1; // query:0, response:1
+        unsigned op:4; // query:0, inverse q.:1, status: 2
+        unsigned aa:1; // authoritative answer
+        unsigned tc:1; // message is truncated
+        unsigned rd:1; // recursion desired (client -> server)
+        unsigned ra:1; // recursion available (server -> client)
+        unsigned z:2;  // reserved
+        unsigned a:1;  // answer is signed by server
+        unsigned rcode:4; // 0 No error
+                          // 1 Format error
+                          // 2 Server failure
+                          // 3 Name Error
+                          // 4 Not Implemented
+                          // 5 Refused
+        unsigned qdcount:16; // number of questions
+        unsigned ancount:16; // number of answers
+        unsigned nscount:16; // number of authority-records
+        unsigned arcount:16; // number of additional records
+        unsigned char data[1];
+}
+
 struct ip6_pkt {
         struct pkt_tun tun;
         struct ip6_hdr hdr;
@@ -43,6 +73,12 @@ struct ip6_tcp {
         struct tcp_pkt data;
 };
 
+struct ip6_udp {
+        struct pkt_tun tun;
+        struct ip6_hdr hdr;
+        struct udp_pkt data;
+};
+
 extern void send_pkt(int fd, struct ip6_pkt* pkt);
 extern int recv_ipv6pkt(int fd, struct pkt_tun** pkt);
 extern int recv_pkt(int fd, struct pkt_tun** pkt);