Wireshark · Wireshark-bugs: [Wireshark-bugs] [Bug 1379] New: Add Connection Configuration Object support to EtherNet/IP dissecto

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http://bugs.wireshark.org/bugzilla/show_bug.cgi?id=1379

           Summary: Add Connection Configuration Object support to
                    EtherNet/IP dissector
           Product: Wireshark
           Version: SVN
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Enhancement
          Priority: Low
         Component: Wireshark
        AssignedTo: wireshark-bugs@xxxxxxxxxxxxx
        ReportedBy: wamslers@xxxxxxxxxxxxx
                CC: wamslers@xxxxxxxxxxxxx


Build Information:
wireshark 0.99.6 (SVN Rev 20822)

Copyright 1998-2007 Gerald Combs <gerald@xxxxxxxxxxxxx> and contributors.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Compiled with GTK+ 2.8.20, with GLib 2.12.4, with libpcap 0.9.5, with libz
1.2.3, without libpcre, without Net-SNMP, without ADNS, without Lua, without
GnuTLS, without Gcrypt, without Kerberos, without PortAudio, without AirPcap.
NOTE: this build doesn't support the "matches" operator for Wireshark filter
syntax.

Running on Linux 2.6.18-3-486, with libpcap version 0.9.5.

Built using gcc 4.1.2 20061115 (prerelease) (Debian 4.1.1-21).

--
Here is my patch for Connection Configuration Object support in EtherNet/IP
(enip/cip)

----------------------------------------------

Index: epan/dissectors/packet-cip.c
===================================================================
--- epan/dissectors/packet-cip.c        (revision 20822)
+++ epan/dissectors/packet-cip.c        (working copy)
@@ -4,8 +4,11 @@
  *
  * Copyright 2004
  * Magnus Hansson <mah@xxxxxx>
- * Joakim Wiberg <jow@xxxxxx>
+ * Joakim Wiberg <jow@xxxxxx> 
  *
+ * Added support for Connection Configuration Object
+ *   ryan wamsley * Copyright 2007
+ *
  * $Id$
  *
  * Wireshark - Network traffic analyzer
@@ -127,9 +130,26 @@
        { SC_FWD_OPEN,              "Forward Open" },
        { SC_UNCON_SEND,           "Unconnected Send" },

+       /* Connection Configuration Object services */
+       { SC_KICK_TIMER,                 "Kick Timer" },
+       { SC_OPEN_CONN,                  "Open Connection" },
+       { SC_CLOSE_CONN,                 "Close Connection" },
+       { SC_CHANGE_START,               "Change Start" },
+       { SC_GET_STATUS,                 "Get Status" },
+       { SC_CHANGE_COMPLETE,            "Change Complete" },
+
        { 0,                                        NULL }
 };

+/* Translate function to string - CIP Service codes that collide with
cip_sc_vals */
+static const value_string cip_sc_vals_cco[] = {
+       /* Connection Configuration Object services */
+       { SC_STOP_CONN,                  "Stop Connection" }, /* collision with
SC_UNCON_SEND */
+       { SC_AUDIT_CHANGE,               "Audit Changes" },   /* collision with
SC_UNCON_SEND */
+
+       { 0,                                        NULL }
+};
+
 /* Translate function to string - CIP Request/Response */
 static const value_string cip_sc_rr[] = {
        { 0,          "Request"  },
@@ -976,7 +996,7 @@
        unsigned char gen_status;
    unsigned char add_stat_size;
    unsigned char temp_byte, route_path_size;
-   unsigned char app_rep_size, i;
+   unsigned char app_rep_size, i, collision;
    int msg_req_siz, num_services, serv_offset;


@@ -987,13 +1007,35 @@
        /* Add Request/Response */
    proto_tree_add_item( rrsc_tree, hf_cip_rr, tvb, offset, 1, TRUE );

-   proto_item_append_text( rrsc_item, "%s (%s)",
-               val_to_str( ( tvb_get_guint8( tvb, offset ) & 0x7F ),
-                  cip_sc_vals , "Unknown Service (%x)"),
-               val_to_str( ( tvb_get_guint8( tvb, offset ) & 0x80 )>>7,
-                  cip_sc_rr, "") );
+   /* watch for service collisions with CCO */
+   temp_byte = tvb_get_guint8( tvb, offset );
+   collision = 0;
+   if ( SC_STOP_CONN == temp_byte || SC_AUDIT_CHANGE == temp_byte )
+   {
+      /* check for CCO object in path... */
+      temp_data = tvb_get_guint8( tvb, offset+3 );
+      /* F3 is the CCO */
+      if ( temp_data == 0xF3 )
+      {
+        collision = 1;
+         proto_item_append_text( rrsc_item, "%s (%s)",
+                     val_to_str( ( tvb_get_guint8( tvb, offset ) & 0x7F ),
+                        cip_sc_vals_cco , "Unknown Service (%x)"),
+                     val_to_str( ( tvb_get_guint8( tvb, offset ) & 0x80 )>>7,
+                        cip_sc_rr, "") );
+      }
+   }

-       /* Add Service code */
+   if (!collision)
+   {
+      proto_item_append_text( rrsc_item, "%s (%s)",
+                  val_to_str( ( tvb_get_guint8( tvb, offset ) & 0x7F ),
+                     cip_sc_vals , "Unknown Service (%x)"),
+                  val_to_str( ( tvb_get_guint8( tvb, offset ) & 0x80 )>>7,
+                     cip_sc_rr, "") );
+   }
+
+        /* Add Service code */
        proto_tree_add_item(rrsc_tree, hf_cip_sc, tvb, offset, 1, TRUE );

        if( tvb_get_guint8( tvb, offset ) & 0x80 )
@@ -1044,12 +1086,12 @@
          pi = proto_tree_add_text( item_tree, tvb, offset+4+add_stat_size,
item_length-4-add_stat_size, "Command Specific data" );
          cmd_data_tree = proto_item_add_subtree( pi, ett_cmd_data );

-                  if( gen_status == CI_GRC_SUCCESS )
-               {
-                       /* Success responses */
-
-                       if( ( tvb_get_guint8( tvb, offset ) & 0x7F ) ==
SC_FWD_OPEN )
-            {
+        if( gen_status == CI_GRC_SUCCESS )
+        {
+            /* Success responses */
+            
+            if( ( tvb_get_guint8( tvb, offset ) & 0x7F ) == SC_FWD_OPEN )
+            {
                /* Forward open Response (Success) */

                /* Display originator to target connection ID */
@@ -1101,7 +1143,7 @@
                 } /* End of if reply data */

             } /* End of if forward open response */
-                       else if( ( tvb_get_guint8( tvb, offset ) & 0x7F ) ==
SC_FWD_CLOSE )
+           else if( ( tvb_get_guint8( tvb, offset ) & 0x7F ) == SC_FWD_CLOSE )
             {
                /* Forward close response (Success) */

@@ -1392,7 +1434,7 @@
             pi = proto_tree_add_text(cmd_data_tree, tvb,
offset+2+req_path_size+36, conn_path_size, "Connection Path: ");
             dissect_epath( tvb, pi, offset+2+req_path_size+36, conn_path_size
);
          }
-         else if( tvb_get_guint8( tvb, offset ) == SC_FWD_CLOSE )
+         else if( tvb_get_guint8( tvb, offset ) == SC_FWD_CLOSE && !
collision)
          {
             /* Forward Close Request */

@@ -1434,57 +1476,75 @@
          } /* End of forward close */
          else if( tvb_get_guint8( tvb, offset ) == SC_UNCON_SEND )
          {
-            /* Unconnected send */
+           /* check for collision */
+           if ( collision )
+           {
+              /* Audit Change */
+                       
+              temp_data = tvb_get_letohs( tvb, offset+2+req_path_size );
+              temp_item = proto_tree_add_text( cmd_data_tree, tvb,
offset+2+req_path_size, 2, "Change Type: ");
+              
+              if (temp_data == 0)
+                 proto_item_append_text(temp_item, "Full" );
+              else if (temp_data == 1)
+                 proto_item_append_text(temp_item, "Incremental" );
+              else
+                 proto_item_append_text(temp_item, "Reserved" );
+           }
+           else
+           {
+              /* Unconnected send */

-            /* Display the priority/tick timer */
-            temp_byte = tvb_get_guint8( tvb, offset+2+req_path_size );
-            proto_tree_add_text( cmd_data_tree, tvb, offset+2+req_path_size,
1, "Priority/Time_tick: 0x%02X", temp_byte );
+               /* Display the priority/tick timer */
+              temp_byte = tvb_get_guint8( tvb, offset+2+req_path_size );
+              proto_tree_add_text( cmd_data_tree, tvb, offset+2+req_path_size,
1, "Priority/Time_tick: 0x%02X", temp_byte );
+              
+              /* Display the time-out ticks */
+              temp_data = tvb_get_guint8( tvb, offset+2+req_path_size+1 );
+              proto_tree_add_text( cmd_data_tree, tvb,
offset+2+req_path_size+1, 1, "Time-out_ticks: %d", temp_data );
+              
+              /* Display the actual time out */
+              temp_data = ( 1 << ( temp_byte & 0x0F ) ) * temp_data;
+              proto_tree_add_text( cmd_data_tree, tvb, offset+2+req_path_size,
2, "Actual Time Out: %dms", temp_data );
+              
+              /* Message request size */
+              msg_req_siz = tvb_get_letohs( tvb, offset+2+req_path_size+2 );
+              proto_tree_add_text( cmd_data_tree, tvb,
offset+2+req_path_size+2, 2, "Message Request Size: 0x%04X", msg_req_siz );
+              
+              /* Message Request */
+              temp_item = proto_tree_add_text( cmd_data_tree, tvb,
offset+2+req_path_size+4, msg_req_siz, "Message Request" );
+              temp_tree = proto_item_add_subtree(temp_item, ett_mes_req );
+              
+              /*
+              ** We call our selves again to disect embedded packet
+              */
+              
+              if(check_col(pinfo->cinfo, COL_INFO))
+                 col_append_fstr( pinfo->cinfo, COL_INFO, ": ");

-            /* Display the time-out ticks */
-            temp_data = tvb_get_guint8( tvb, offset+2+req_path_size+1 );
-            proto_tree_add_text( cmd_data_tree, tvb, offset+2+req_path_size+1,
1, "Time-out_ticks: %d", temp_data );
+              dissect_cip_data( temp_tree, tvb, offset+2+req_path_size+4,
msg_req_siz, pinfo );
+              
+              if( msg_req_siz % 2 )
+              {
+                 /* Pad byte */
+                 proto_tree_add_text( cmd_data_tree, tvb,
offset+2+req_path_size+4+msg_req_siz, 1, "Pad Byte (0x%02X)",
+                                      tvb_get_guint8( tvb,
offset+2+req_path_size+4+msg_req_siz ) );
+                 msg_req_siz++;        /* include the padding */
+              }
+              
+              /* Route Path Size */
+              route_path_size = tvb_get_guint8( tvb,
offset+2+req_path_size+4+msg_req_siz )*2;
+              proto_tree_add_text( cmd_data_tree, tvb,
offset+2+req_path_size+4+msg_req_siz, 1, "Route Path Size: %d (words)",
route_path_size/2 );
+              
+              /* Reserved */
+              proto_tree_add_text( cmd_data_tree, tvb,
offset+2+req_path_size+5+msg_req_siz, 1, "Reserved (0x%02X)",
+                                   tvb_get_guint8( tvb,
offset+2+req_path_size+5+msg_req_siz ) );
+              
+              /* Route Path */
+              temp_item = proto_tree_add_text(cmd_data_tree, tvb,
offset+2+req_path_size+6+msg_req_siz, route_path_size, "Route Path: ");
+              dissect_epath( tvb, temp_item,
offset+2+req_path_size+6+msg_req_siz, route_path_size );
+           }

-            /* Display the actual time out */
-            temp_data = ( 1 << ( temp_byte & 0x0F ) ) * temp_data;
-            proto_tree_add_text( cmd_data_tree, tvb, offset+2+req_path_size,
2, "Actual Time Out: %dms", temp_data );
-
-            /* Message request size */
-            msg_req_siz = tvb_get_letohs( tvb, offset+2+req_path_size+2 );
-            proto_tree_add_text( cmd_data_tree, tvb, offset+2+req_path_size+2,
2, "Message Request Size: 0x%04X", msg_req_siz );
-
-            /* Message Request */
-            temp_item = proto_tree_add_text( cmd_data_tree, tvb,
offset+2+req_path_size+4, msg_req_siz, "Message Request" );
-            temp_tree = proto_item_add_subtree(temp_item, ett_mes_req );
-
-            /*
-            ** We call our selves again to disect embedded packet
-            */
-
-            if(check_col(pinfo->cinfo, COL_INFO))
-               col_append_fstr( pinfo->cinfo, COL_INFO, ": ");
-
-            dissect_cip_data( temp_tree, tvb, offset+2+req_path_size+4,
msg_req_siz, pinfo );
-
-            if( msg_req_siz % 2 )
-            {
-               /* Pad byte */
-               proto_tree_add_text( cmd_data_tree, tvb,
offset+2+req_path_size+4+msg_req_siz, 1, "Pad Byte (0x%02X)",
-                  tvb_get_guint8( tvb, offset+2+req_path_size+4+msg_req_siz )
);
-               msg_req_siz++;  /* include the padding */
-            }
-
-            /* Route Path Size */
-            route_path_size = tvb_get_guint8( tvb,
offset+2+req_path_size+4+msg_req_siz )*2;
-            proto_tree_add_text( cmd_data_tree, tvb,
offset+2+req_path_size+4+msg_req_siz, 1, "Route Path Size: %d (words)",
route_path_size/2 );
-
-            /* Reserved */
-            proto_tree_add_text( cmd_data_tree, tvb,
offset+2+req_path_size+5+msg_req_siz, 1, "Reserved (0x%02X)",
-                tvb_get_guint8( tvb, offset+2+req_path_size+5+msg_req_siz ) );
-
-            /* Route Path */
-            temp_item = proto_tree_add_text(cmd_data_tree, tvb,
offset+2+req_path_size+6+msg_req_siz, route_path_size, "Route Path: ");
-            dissect_epath( tvb, temp_item,
offset+2+req_path_size+6+msg_req_siz, route_path_size );
-
          } /* End if unconnected send */
          else if( tvb_get_guint8( tvb, offset ) == SC_MULT_SERV_PACK )
          {
@@ -1550,6 +1610,20 @@
             }

          } /* End of Get attribute list request */
+        else if ( tvb_get_guint8( tvb, offset ) == SC_CHANGE_COMPLETE )
+        {
+          /* Change complete request */
+          
+            temp_data = tvb_get_letohs( tvb, offset+2+req_path_size );
+           temp_item = proto_tree_add_text( cmd_data_tree, tvb,
offset+2+req_path_size, 2, "Change Type: ");
+
+           if (temp_data == 0)
+            proto_item_append_text(temp_item, "Full" );
+           else if (temp_data == 1)
+             proto_item_append_text(temp_item, "Incremental" );
+           else
+             proto_item_append_text(temp_item, "Reserved" );
+        }
          else
          {
                      /* Add data */
Index: epan/dissectors/packet-cip.h
===================================================================
--- epan/dissectors/packet-cip.h        (revision 20822)
+++ epan/dissectors/packet-cip.h        (working copy)
@@ -6,6 +6,9 @@
  * Magnus Hansson <mah@xxxxxx>
  * Joakim Wiberg <jow@xxxxxx>
  *
+ * Added support for Connection Configuration Object
+ *   ryan wamsley * Copyright 2007
+ *
  * $Id$
  *
  * Wireshark - Network traffic analyzer
@@ -51,7 +54,17 @@
 #define SC_FWD_CLOSE             0x4E
 #define SC_UNCON_SEND            0x52
 #define SC_FWD_OPEN              0x54
+/* Connection Configuration Object services */
+#define SC_KICK_TIMER            0x4B
+#define SC_OPEN_CONN             0x4C
+#define SC_CLOSE_CONN            0x4D
+#define SC_STOP_CONN             0x4E  /* collision with SC_FWD_CLOSE */
+#define SC_CHANGE_START          0x4F
+#define SC_GET_STATUS            0x50
+#define SC_CHANGE_COMPLETE       0x51
+#define SC_AUDIT_CHANGE          0x52  /* collision with SC_UNCON_SEND */

+
 /* CIP Genral status codes */
 #define CI_GRC_SUCCESS              0x00
 #define CI_GRC_FAILURE              0x01


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