Added Richard Sharpe's TFTP support.

svn path=/trunk/; revision=190

1 files changed, 146 insertions, 0 deletions

diff --git a/packet-tftp.c b/packet-tftp.c
new file mode 100644
index 0000000000..dbb07dd8ca
--- /dev/null
+++ b/packet-tftp.c
@@ -0,0 +1,146 @@
+/* packet-tftp.c
+ * Routines for tftp packet dissection
+ *
+ * Richard Sharpe <rsharpe@ns.aus.com>
+ *
+ * $Id: packet-tftp.c,v 1.1 1999/02/15 06:36:56 guy Exp $
+ *
+ * Ethereal - Network traffic analyzer
+ * By Gerald Combs <gerald@unicom.net>
+ * Copyright 1998 Gerald Combs
+ *
+ * Copied from packet-bootp.c
+ * 
+ * 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 the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <gtk/gtk.h>
+
+#include <stdio.h>
+
+#ifdef HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+
+#ifdef HAVE_NETINET_IN_H
+# include <netinet/in.h>
+#endif
+
+#include <arpa/tftp.h>
+
+#include "ethereal.h"
+#include "packet.h"
+#include "etypes.h"
+
+char *tftp_opcodes[8] = {
+  "Unknown Request",
+  "Read Request",
+  "Write Request",
+  "Data Packet",
+  "Acknowledgement",
+  "Error Code",
+  "Unknown Request",
+  "Unknown Request"
+};
+
+char *tftp_errors[8] = {
+  "Not defined",
+  "File not found",
+  "Access violation",
+  "Disk full or allocation exceeded",
+  "Illegal TFTP Operation",
+  "Unknown transfer ID",
+  "File already exists",
+  "No such user"
+};
+
+void
+dissect_tftp(const u_char *pd, int offset, frame_data *fd, GtkTree *tree)
+{
+	GtkWidget	*tftp_tree, *ti;
+	struct tftphdr  *tftp_pack = (struct tftphdr *)&pd[offset]; /* Want the hdr */
+	u_int           i1;
+
+	if (check_col(fd, COL_PROTOCOL))
+		col_add_str(fd, COL_PROTOCOL, "TFTP");
+
+	if (check_col(fd, COL_INFO)) {
+
+	  i1 = ntohs(tftp_pack -> th_opcode);
+	  col_add_fstr(fd, COL_INFO, "TFTP %s", i1 <= ERROR ? tftp_opcodes[i1 % 8] : "Unknown Request");
+
+	}
+
+	if (tree) {
+
+	  ti = add_item_to_tree(GTK_WIDGET(tree), offset, END_OF_FRAME,
+				"Trivial File Transfer Protocol");
+	  tftp_tree = gtk_tree_new();
+	  add_subtree(ti, tftp_tree, ETT_TFTP);
+
+	  switch (i1 = ntohs(tftp_pack -> th_opcode)) {
+	  case RRQ:
+	    add_item_to_tree(tftp_tree, offset, 2, "Read Request");
+	    offset += 2;
+	    i1 = strlen(pd+offset);
+	    add_item_to_tree(tftp_tree, offset, i1+1, "Source File: %s", pd+offset);
+	    offset += i1 + 1;
+	    add_item_to_tree(tftp_tree, offset, END_OF_FRAME, "Type: %s",pd+offset);
+	    break;
+	  case WRQ:
+	    add_item_to_tree(tftp_tree, offset, 2, "Write Request");
+	    offset += 2;
+	    i1 = strlen(pd+offset);
+	    add_item_to_tree(tftp_tree, offset, i1+1, "Destination File: %s", pd+offset);
+	    offset += i1 + 1;
+	    add_item_to_tree(tftp_tree, offset+2, END_OF_FRAME, "Type: %s",pd+offset);
+	    break;
+	  case DATA:
+	    add_item_to_tree(tftp_tree, offset, 2, "Data Packet");
+	    offset += 2;
+	    i1 = ntohs(*(short *)(pd + offset));
+	    add_item_to_tree(tftp_tree, offset, 2, "Block = %u", i1);
+	    offset += 2;
+	    add_item_to_tree(tftp_tree, offset, END_OF_FRAME,
+		"Data (%d bytes)", END_OF_FRAME);
+	    break;
+	  case ACK:
+	    add_item_to_tree(tftp_tree, offset, 2, "Acknowledgement");
+	    offset += 2;
+	    i1 = ntohs(*(short *)(pd + offset));
+	    add_item_to_tree(tftp_tree, offset, END_OF_FRAME, "Block = %u", i1);
+	    break;
+	  case ERROR:
+	    add_item_to_tree(tftp_tree, offset, 2, "Error Code");
+	    offset += 2;
+	    i1 = ntohs(*(short *)(pd + offset));
+	    add_item_to_tree(tftp_tree, offset, 2, "Code = %s", tftp_errors[i1 % 8]);
+	    offset += 2;
+	    add_item_to_tree(tftp_tree, offset, END_OF_FRAME, "Error Message: %s", pd + offset);
+	    break;
+	  default:
+	    add_item_to_tree(tftp_tree, offset, 2, "Unknown TFTP Request: %0X.", i1);
+	    offset += 2;
+	    add_item_to_tree(tftp_tree, offset, END_OF_FRAME,
+		"Data (%d bytes)", END_OF_FRAME);
+	    break;
+	  }
+
+	}
+}