Addition of CCID3 support!!! Involves major refactoring.

[dccp2tcp] / dccp2tcp.h

diff --git a/dccp2tcp.h b/dccp2tcp.h
index e3b373ccc1d369c46935b8c935bcb0307fe7c564..dafaeac8158b442a0179ad5f69f7d4b8de455988 100644 (file)
--- a/dccp2tcp.h
+++ b/dccp2tcp.h
@@ -2,7 +2,7 @@
 Utility to convert a DCCP flow to a TCP flow for DCCP analysis via
                tcptrace.
 
-Copyright (C) 2012  Samuel Jero <sj323707@ohio.edu>
+Copyright (C) 2013  Samuel Jero <sj323707@ohio.edu>
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -18,13 +18,11 @@ You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 Author: Samuel Jero <sj323707@ohio.edu>
-Date: 11/2012
+Date: 02/2013
 
 Notes:
-       1)CCID2 ONLY
-       2)DCCP MUST use 48 bit sequence numbers
-       3)DCCP DATA packets are not implemented (Linux doesn't use them)
-       4)DCCP Ack packets show up as TCP packets containing one byte
+       1)DCCP MUST use 48 bit sequence numbers
+       2)DCCP Ack packets show up as TCP packets containing one byte
 ******************************************************************************/
 #ifndef _DCCP2TCP_H
 #define _DCCP2TCP_H
@@ -58,8 +56,8 @@ Notes:
 #define MAX_PACKET     1600    /*Maximum size of TCP packet */
 #define        TBL_SZ          40000   /*Size of Sequence Number Table*/
 
-
-
+#define TRUE 1
+#define FALSE 0
 
 /*Packet structure*/
 struct packet{
@@ -95,14 +93,15 @@ enum con_type{
        CCID3,
 };
 
-/*Host---half of a connection*/
-struct host{
+/*Half Connection structure*/
+struct hcon{
        int                                     id_len; /*Length of ID*/
        u_char                          *id;    /*Host ID*/
        __be16                          port;   /*Host DCCP port*/
        struct tbl                      *table; /*Host Sequence Number Table*/
        int                                     size;   /*Size of Sequence Number Table*/
        int                                     cur;    /*Current TCP Sequence Number*/
+       int                                     high_ack;/*Highest ACK seen*/
        enum con_state          state;  /*Connection state*/
        enum con_type           type;   /*Connection type*/
 };
@@ -110,8 +109,8 @@ struct host{
 /*Connection structure*/
 struct connection{
        struct connection       *next;  /*List pointer*/
-       struct host                     A;              /*Host A*/
-       struct host                     B;              /*Host B*/
+       struct hcon                     A;              /*Host A*/
+       struct hcon                     B;              /*Host B*/
 };
 
 /*sequence number table structure */
@@ -143,13 +142,17 @@ int do_encap(int link, struct packet *new, const struct const_packet *old);
 
 /*Connection functions*/
 int get_host(u_char *src_id, u_char* dest_id, int id_len, int src_port, int dest_port,
-               struct host **fwd, struct host **rev);
+               struct hcon **fwd, struct hcon **rev);
 struct connection *add_connection(u_char *src_id, u_char* dest_id, int id_len,
                int src_port, int dest_port);
-int update_state(struct host* hst, enum con_state st);
+int update_state(struct hcon* hst, enum con_state st);
 void cleanup_connections();
 
-/*Per-CCID convert functions*/
-int ccid2_convert_packet(struct packet *new, const struct const_packet* old);
+/*Half Connection/Sequence number functions*/
+u_int32_t initialize_hcon(struct hcon *hcn, __be32 initial);
+u_int32_t add_new_seq(struct hcon *hcn, __be32 num, int size, enum dccp_pkt_type type);
+u_int32_t convert_ack(struct hcon *hcn, __be32 num, struct hcon *o_hcn);
+int acked_packet_size(struct hcon *hcn, __be32 num);
+unsigned int interp_ack_vect(u_char* hdr);
 
 #endif