Multiple Connection Support

[dccp2tcp] / dccp2tcp.h

diff --git a/dccp2tcp.h b/dccp2tcp.h
index 151b22cb3a957943c3358370adbb917f41ce69cc..4b556cfcc979eb9ca39dff29b42cc71f803094e6 100644 (file)
--- a/dccp2tcp.h
+++ b/dccp2tcp.h
@@ -1,19 +1,18 @@
 /******************************************************************************
 Author: Samuel Jero
 
-Date: 5/2011
+Date: 7/2011
 
 Description: Header file for program to convert a DCCP flow to a TCP flow for DCCP
                 analysis via tcptrace.
 
 Notes:
-       1)Supports only a single DCCP connection per capture
-       2)Source Port!=Destination Port
-       3)DCCP MUST use 48 bit sequence numbers
-       4)Checksums are not computed (they are zeroed)
-       5)Only implements those packet types normally used in a session
-       6)DCCP Ack packets show up as TCP packets containing one byte
-       7)Very little error checking of packet headers
+       1)CCID2 ONLY
+       2)DCCP MUST use 48 bit sequence numbers
+       3)Checksums are not computed (they are zeroed)
+       4)Only implements those packet types normally used in a session
+       5)DCCP Ack packets show up as TCP packets containing one byte
+       6)Very little error checking of packet headers
 ******************************************************************************/
 #ifndef _DCCP2TCP_H
 #define _DCCP2TCP_H
@@ -48,12 +47,47 @@ Notes:
 
 
 
-/*sequence number structure--one per side of the connection */
-struct seq_num{
-       int cur;                        /*current sequence number */
-       __be16 addr;            /*connection half id---source port */
-       struct tbl *table;      /*sequence number table */
-       int size;                       /*sequence number table size */
+
+/*Packet structure*/
+struct packet{
+       struct pcap_pkthdr      *h;             /*libpcap header*/
+       u_char                          *data;  /*Packet Data*/
+       int                                     length; /*Packet length*/
+       uint32_t                        src_id; /*Source ID of packet*/
+       uint32_t                        dest_id; /*Destination ID of packet*/
+};
+
+/*Constant Packet structure*/
+struct const_packet{
+       const struct pcap_pkthdr *h;    /*libpcap header*/
+       const u_char                    *data;  /*Packet Data*/
+       int                                             length; /*Packet length*/
+       uint32_t                                src_id; /*Source ID of packet*/
+       uint32_t                                dest_id;/*Destination ID of packet*/
+};
+
+/*Connection states*/
+enum con_state{
+       INIT,
+       OPEN,
+       CLOSE,
+};
+
+/*Host---half of a connection*/
+struct host{
+       uint32_t                        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*/
+       enum con_state          state;  /*Connection state*/
+};
+
+/*Connection structure*/
+struct connection{
+       struct connection       *next;  /*List pointer*/
+       struct host                     A;              /*Host A*/
+       struct host                     B;              /*Host B*/
 };
 
 /*sequence number table structure */
@@ -70,9 +104,7 @@ extern int yellow;           /*tcptrace yellow line as currently acked packet*/
 extern int green;              /*tcptrace green line as currently acked packet*/
 extern int sack;               /*add TCP SACKS*/
 
-/*Half Connection Structures*/
-extern struct seq_num  *s1;    /*sequence number structure for side one of connection*/
-extern struct seq_num  *s2;    /*sequence number structure for side two of connection*/
+extern struct connection *chead;/*connection list*/
 
 
 /*debug printf
@@ -84,6 +116,11 @@ extern struct seq_num       *s2;    /*sequence number structure for side two of connectio
 void dbgprintf(int level, const char *fmt, ...);
 
 /*Function to parse encapsulation*/
-int do_encap(int link, struct pcap_pkthdr *h, u_char **nptr, int *nlength, const u_char **optr, int *length);
+int do_encap(int link, struct packet *new, const struct const_packet *old);
+
+/*Connection functions*/
+int get_host(uint32_t src_id, uint32_t dest_id, int src_port, int dest_port, struct host *fwd, struct host *rev);
+struct connection *add_connection(uint32_t src_id, uint32_t dest_id, int src_port, int dest_port);
+int update_state(struct host* hst, enum con_state st);
 
 #endif