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-rw-r--r--plugins/docsis/packet-map.c311
1 files changed, 311 insertions, 0 deletions
diff --git a/plugins/docsis/packet-map.c b/plugins/docsis/packet-map.c
new file mode 100644
index 0000000000..c167ebebd0
--- /dev/null
+++ b/plugins/docsis/packet-map.c
@@ -0,0 +1,311 @@
+/* packet-map.c
+ * Routines for MAP Message dissection
+ * Copyright 2002, Anand V. Narwani <anarwani@cisco.com>
+ *
+ * Ethereal - Network traffic analyzer
+ * By Gerald Combs <gerald@ethereal.com>
+ * Copyright 1998 Gerald Combs
+ *
+ * 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 "plugins/plugin_api.h"
+#include "plugins/plugin_api_defs.h"
+#include "moduleinfo.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#ifdef HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+
+#ifdef HAVE_NETINET_IN_H
+# include <netinet/in.h>
+#endif
+
+#include <gmodule.h>
+
+#ifdef NEED_SNPRINTF_H
+# include "snprintf.h"
+#endif
+
+#include <epan/packet.h>
+
+#define IUC_REQUEST 1
+#define IUC_REQ_DATA 2
+#define IUC_INIT_MAINT 3
+#define IUC_STATION_MAINT 4
+#define IUC_SHORT_DATA_GRANT 5
+#define IUC_LONG_DATA_GRANT 6
+#define IUC_NULL_IE 7
+#define IUC_DATA_ACK 8
+#define IUC_RESERVED9 9
+#define IUC_RESERVED10 10
+#define IUC_RESERVED11 11
+#define IUC_RESERVED12 12
+#define IUC_RESERVED13 13
+#define IUC_RESERVED14 14
+#define IUC_EXPANSION 15
+
+/* Initialize the protocol and registered fields */
+static int proto_docsis_map = -1;
+static int hf_docsis_map_upstream_chid = -1;
+static int hf_docsis_map_ucd_count = -1;
+static int hf_docsis_map_numie = -1;
+static int hf_docsis_map = -1;
+static int hf_docsis_map_alloc_start = -1;
+static int hf_docsis_map_ack_time = -1;
+static int hf_docsis_map_rng_start = -1;
+static int hf_docsis_map_rng_end = -1;
+static int hf_docsis_map_data_start = -1;
+static int hf_docsis_map_data_end = -1;
+static int hf_docsis_map_ie = -1;
+static int hf_docsis_map_rsvd = -1;
+
+static int hf_docsis_map_sid = -1;
+static int hf_docsis_map_iuc = -1;
+static int hf_docsis_map_offset = -1;
+
+/* Initialize the subtree pointers */
+static gint ett_docsis_map = -1;
+
+/* Defined in packet-ucd.c */
+extern value_string iuc_vals[];
+
+/* Code to actually dissect the packets */
+static void
+dissect_map (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
+{
+ guint8 i, numie;
+ guint16 pos;
+ guint16 sid;
+ guint8 iuc;
+ guint16 offset;
+ guint32 ie, temp, mask;
+ proto_item *it;
+ proto_tree *map_tree;
+ guint8 upchid, ucd_count;
+
+
+ numie = tvb_get_guint8 (tvb, 2);
+ upchid = tvb_get_guint8 (tvb, 0);
+ ucd_count = tvb_get_guint8 (tvb, 1);
+
+ if (check_col (pinfo->cinfo, COL_INFO))
+ {
+ col_clear (pinfo->cinfo, COL_INFO);
+ if (upchid > 0)
+ col_add_fstr (pinfo->cinfo, COL_INFO,
+ "Map Message: Channel ID = %u (U%u), UCD Count = %u, # IE's = %u",
+ upchid, upchid - 1, ucd_count, numie);
+ else
+ col_add_fstr (pinfo->cinfo, COL_INFO,
+ "Map Message: Channel ID = %u (Telephony Return), UCD Count = %u, # IE's = %u",
+ upchid, ucd_count, numie);
+ }
+
+ if (tree)
+ {
+ it =
+ proto_tree_add_protocol_format (tree, proto_docsis_map, tvb, 0,
+ tvb_length_remaining (tvb, 0),
+ "MAP Message");
+ map_tree = proto_item_add_subtree (it, ett_docsis_map);
+
+ proto_tree_add_item (map_tree, hf_docsis_map_upstream_chid, tvb, 0, 1,
+ FALSE);
+ proto_tree_add_item (map_tree, hf_docsis_map_ucd_count, tvb, 1, 1,
+ FALSE);
+ proto_tree_add_item (map_tree, hf_docsis_map_numie, tvb, 2, 1, FALSE);
+ proto_tree_add_item (map_tree, hf_docsis_map_rsvd, tvb, 3, 1, FALSE);
+ proto_tree_add_item (map_tree, hf_docsis_map_alloc_start, tvb, 4, 4,
+ FALSE);
+ proto_tree_add_item (map_tree, hf_docsis_map_ack_time, tvb, 8, 4,
+ FALSE);
+ proto_tree_add_item (map_tree, hf_docsis_map_rng_start, tvb, 12, 1,
+ FALSE);
+ proto_tree_add_item (map_tree, hf_docsis_map_rng_end, tvb, 13, 1,
+ FALSE);
+ proto_tree_add_item (map_tree, hf_docsis_map_data_start, tvb, 14, 1,
+ FALSE);
+ proto_tree_add_item (map_tree, hf_docsis_map_data_end, tvb, 15, 1,
+ FALSE);
+
+ pos = 16;
+ for (i = 0; i < numie; i++)
+ {
+ ie = tvb_get_ntohl (tvb, pos);
+ mask = 0xFFFC0000;
+ temp = (ie & mask);
+ temp = temp >> 18;
+ sid = (guint16) (temp & 0x3FFF);
+ mask = 0x3C000;
+ temp = (ie & mask);
+ temp = temp >> 14;
+ iuc = (guint8) (temp & 0x0F);
+ mask = 0x3FFF;
+ offset = (guint16) (ie & mask);
+ proto_tree_add_item_hidden(map_tree, hf_docsis_map_sid, tvb, pos, 4, FALSE);
+ proto_tree_add_item_hidden(map_tree, hf_docsis_map_iuc, tvb, pos, 4, FALSE);
+ proto_tree_add_item_hidden(map_tree, hf_docsis_map_offset, tvb, pos, 4, FALSE);
+ if (sid == 0x3FFF)
+ proto_tree_add_uint_format (map_tree, hf_docsis_map_ie, tvb, pos, 4,
+ ie, "SID = 0x%x (All CM's), IUC = %s, Offset = %u",
+ sid, val_to_str (iuc, iuc_vals, "%s"),
+ offset);
+ else
+ proto_tree_add_uint_format (map_tree, hf_docsis_map_ie, tvb, pos, 4,
+ ie, "SID = %u, IUC = %s, Offset = %u",
+ sid, val_to_str (iuc, iuc_vals, "%s"),
+ offset);
+ pos = pos + 4;
+ } /* for... */
+ } /* if(tree) */
+
+
+}
+
+
+
+
+/* Register the protocol with Ethereal */
+
+/* this format is require because a script is used to build the C function
+ that calls all the protocol registration.
+*/
+
+
+void
+proto_register_docsis_map (void)
+{
+
+/* Setup list of header fields See Section 1.6.1 for details*/
+ static hf_register_info hf[] = {
+ {&hf_docsis_map,
+ {"Map Message", "docsis.map",
+ FT_BYTES, BASE_HEX, NULL, 0x0,
+ "MAP Message", HFILL}
+ },
+ {&hf_docsis_map_ucd_count,
+ {"UCD Count", "docsis.map.ucdcount",
+ FT_UINT8, BASE_DEC, NULL, 0x0,
+ "Map UCD Count", HFILL}
+ },
+ {&hf_docsis_map_upstream_chid,
+ {"Upstream Channel ID", "docsis.map.upchid",
+ FT_UINT8, BASE_DEC, NULL, 0x0,
+ "Upstream Channel ID", HFILL}
+ },
+ {&hf_docsis_map_numie,
+ {"Number of IE's", "docsis.map.numie",
+ FT_UINT8, BASE_DEC, NULL, 0x0,
+ "Number of Information Elements", HFILL}
+ },
+ {&hf_docsis_map_alloc_start,
+ {"Alloc Start Time (minislots)", "docsis.map.allocstart",
+ FT_UINT32, BASE_DEC, NULL, 0x0,
+ "Alloc Start Time (minislots)", HFILL}
+ },
+ {&hf_docsis_map_ack_time,
+ {"ACK Time (minislots)", "docsis.map.acktime",
+ FT_UINT32, BASE_DEC, NULL, 0x0,
+ "Ack Time (minislots)", HFILL}
+ },
+ {&hf_docsis_map_rng_start,
+ {"Ranging Backoff Start", "docsis.map.rng_start",
+ FT_UINT8, BASE_DEC, NULL, 0x0,
+ "Ranging Backoff Start", HFILL}
+ },
+ {&hf_docsis_map_rng_end,
+ {"Ranging Backoff End", "docsis.map.rng_end",
+ FT_UINT8, BASE_DEC, NULL, 0x0,
+ "Ranging Backoff End", HFILL}
+ },
+ {&hf_docsis_map_data_start,
+ {"Data Backoff Start", "docsis.map.data_start",
+ FT_UINT8, BASE_DEC, NULL, 0x0,
+ "Data Backoff Start", HFILL}
+ },
+ {&hf_docsis_map_data_end,
+ {"Data Backoff End", "docsis.map.data_end",
+ FT_UINT8, BASE_DEC, NULL, 0x0,
+ "Data Backoff End", HFILL}
+ },
+ {&hf_docsis_map_ie,
+ {"Information Element", "docsis.map.ie",
+ FT_UINT32, BASE_HEX, NULL, 0x0,
+ "Information Element", HFILL}
+ },
+ {&hf_docsis_map_rsvd,
+ {"Reserved [0x00]", "docsis.map.rsvd",
+ FT_UINT8, BASE_HEX, NULL, 0x0,
+ "Reserved Byte", HFILL}
+ },
+ {&hf_docsis_map_sid,
+ {"Service Identifier", "docsis.map.sid",
+ FT_UINT32, BASE_DEC, NULL, 0xFFFC0000,
+ "Service Identifier", HFILL}
+ },
+ {&hf_docsis_map_iuc,
+ {"Interval Usage Code", "docsis.map.iuc",
+ FT_UINT32, BASE_DEC, VALS(iuc_vals), 0x0003c000,
+ "Interval Usage Code", HFILL}
+ },
+ {&hf_docsis_map_offset,
+ {"Offset", "docsis.map.offset",
+ FT_UINT32, BASE_DEC, NULL, 0x00003fff,
+ "Offset", HFILL}
+ },
+
+ };
+
+/* Setup protocol subtree array */
+ static gint *ett[] = {
+ &ett_docsis_map,
+ };
+
+/* Register the protocol name and description */
+ proto_docsis_map =
+ proto_register_protocol ("DOCSIS Upstream Bandwidth Allocation",
+ "DOCSIS MAP", "docsis_map");
+
+/* Required function calls to register the header fields and subtrees used */
+ proto_register_field_array (proto_docsis_map, hf, array_length (hf));
+ proto_register_subtree_array (ett, array_length (ett));
+
+ register_dissector ("docsis_map", dissect_map, proto_docsis_map);
+}
+
+
+/* If this dissector uses sub-dissector registration add a registration routine.
+ This format is required because a script is used to find these routines and
+ create the code that calls these routines.
+*/
+void
+proto_reg_handoff_docsis_map (void)
+{
+ dissector_handle_t docsis_map_handle;
+
+ docsis_map_handle = find_dissector ("docsis_map");
+ dissector_add ("docsis_mgmt", 0x03, docsis_map_handle);
+
+}
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