diff options
Diffstat (limited to 'epan/dissectors/packet-mms-data.c')
| -rw-r--r-- | epan/dissectors/packet-mms-data.c | 306 |
1 files changed, 306 insertions, 0 deletions
diff --git a/epan/dissectors/packet-mms-data.c b/epan/dissectors/packet-mms-data.c new file mode 100644 index 0000000000..81596a468d --- /dev/null +++ b/epan/dissectors/packet-mms-data.c @@ -0,0 +1,306 @@ +/* packet-mms-data.c
+ *
+ * Routines for MMS data message dissection
+ * MMS = Microsoft Media Server
+ *
+ * Copyright 2005
+ * Written by Martin Mathieson
+ *
+ * $Id: packet-rdt.c 14456 2005-05-27 18:35:19Z etxrab $
+ *
+ * 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.
+ */
+
+/* Information sources:
+ * sdp.ppona.com
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <glib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <epan/packet.h>
+#include <epan/conversation.h>
+
+static dissector_handle_t mms_data_handle;
+
+static gint proto_mms_data = -1;
+
+/* Fields */
+
+/* Pre-header fields */
+static gint hf_mms_data_sequence_number = -1;
+static gint hf_mms_data_packet_id_type = -1;
+static gint hf_mms_data_packet_length = -1;
+
+/* UDP command fields */
+static gint hf_mms_data_header_id = -1;
+static gint hf_mms_data_client_id = -1;
+static gint hf_mms_data_command_id = -1;
+static gint hf_mms_data_packet_to_resend = -1;
+
+static gint ett_mms_data = -1;
+
+#define MMS_UDP_COMMAND_PORT 1755
+
+/* Parse the only known UDP command (0x01) */
+static void dissect_mms_data_udp_command(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
+{
+ gint offset = 0;
+
+ /* Header ID */
+ proto_tree_add_item(tree, hf_mms_data_header_id, tvb, offset, 4, TRUE);
+ offset += 4;
+
+ /* Client ID */
+ proto_tree_add_item(tree, hf_mms_data_client_id, tvb, offset, 4, TRUE);
+ offset += 4;
+
+ /* Command ID */
+ proto_tree_add_item(tree, hf_mms_data_command_id, tvb, offset, 2, TRUE);
+ offset += 4;
+
+ if (check_col(pinfo->cinfo, COL_INFO))
+ {
+ col_add_str(pinfo->cinfo, COL_INFO, "Request to resend packet(s):");
+ }
+
+ /* Show list of packets to resend */
+ while (tvb_length_remaining(tvb, offset) >= 4)
+ {
+ guint32 packet_number = tvb_get_letohl(tvb, offset);
+ proto_tree_add_item(tree, hf_mms_data_packet_to_resend, tvb, offset, 4, TRUE);
+ offset += 4;
+
+ if (check_col(pinfo->cinfo, COL_INFO))
+ {
+ col_append_fstr(pinfo->cinfo, COL_INFO, " %u", packet_number);
+ }
+ }
+}
+
+
+/****************************************************************************/
+/* Main dissection function */
+/****************************************************************************/
+static void dissect_mms_data(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
+{
+ gint offset = 0;
+ proto_item *ti = NULL;
+ proto_tree *mms_tree = NULL;
+ guint32 sequence_number;
+ guint16 packet_length;
+
+ if (check_col(pinfo->cinfo, COL_PROTOCOL))
+ {
+ col_set_str(pinfo->cinfo, COL_PROTOCOL, "MMS-d");
+ }
+
+ /* Create MMS data protocol tree */
+ if (tree)
+ {
+ ti = proto_tree_add_item(tree, proto_mms_data, tvb, offset, -1, FALSE);
+ mms_tree = proto_item_add_subtree(ti, ett_mms_data);
+ }
+
+ /* May be the command asking for packets to be resent */
+ if ((pinfo->ptype == PT_UDP) && (pinfo->destport == MMS_UDP_COMMAND_PORT))
+ {
+ dissect_mms_data_udp_command(tvb, pinfo, mms_tree);
+ return;
+ }
+
+ /* Sequence number */
+ sequence_number = tvb_get_letohl(tvb, offset);
+ proto_tree_add_item(mms_tree, hf_mms_data_sequence_number, tvb, offset, 4, TRUE);
+ offset += 4;
+
+ /* Packet ID type */
+ proto_tree_add_item(mms_tree, hf_mms_data_packet_id_type, tvb, offset, 1, TRUE);
+ offset++;
+
+ /* TODO: flags depending upon whether UDP or TCP */
+ offset++;
+
+ /* Packet Length */
+ packet_length = tvb_get_letohs(tvb, offset);
+ proto_tree_add_item(mms_tree, hf_mms_data_packet_length, tvb, offset, 2, TRUE);
+ offset += 2;
+
+ /* Show summary in info column */
+ if (check_col(pinfo->cinfo, COL_INFO))
+ {
+ col_add_fstr(pinfo->cinfo, COL_INFO, "Data: s=%05u, l=%05u",
+ sequence_number, packet_length);
+ }
+}
+
+
+/* Set up an MMS-d conversation */
+void mms_data_add_address(packet_info *pinfo, address *addr, port_type pt, int port)
+{
+ address null_addr;
+ conversation_t* p_conv;
+
+ /* If this isn't the first time this packet has been processed,
+ * we've already done this work, so we don't need to do it
+ * again. */
+ if (pinfo->fd->flags.visited)
+ {
+ return;
+ }
+
+ SET_ADDRESS(&null_addr, AT_NONE, 0, NULL);
+
+ /* Check if the ip address and port combination is not
+ * already registered as a conversation. */
+ p_conv = find_conversation(pinfo->fd->num, addr, &null_addr, pt, port, 0,
+ NO_ADDR_B | NO_PORT_B);
+
+ /* If not, create a new conversation. */
+ if (!p_conv)
+ {
+ p_conv = conversation_new(pinfo->fd->num, addr, &null_addr, pt,
+ (guint32)port, 0, NO_ADDR2 | NO_PORT2);
+ }
+
+ /* Set dissector */
+ conversation_set_dissector(p_conv, mms_data_handle);
+}
+
+
+/**************************/
+/* Register protocol */
+void proto_register_mms_data(void)
+{
+ static hf_register_info hf[] =
+ {
+ {
+ &hf_mms_data_sequence_number,
+ {
+ "Sequence number",
+ "mms.data.sequence",
+ FT_UINT32,
+ BASE_DEC,
+ NULL,
+ 0x0,
+ "", HFILL
+ }
+ },
+ {
+ &hf_mms_data_packet_id_type,
+ {
+ "Packet ID type",
+ "mms.data.packet-id-type",
+ FT_UINT8,
+ BASE_HEX,
+ NULL,
+ 0x0,
+ "", HFILL
+ }
+ },
+ {
+ &hf_mms_data_packet_length,
+ {
+ "Packet length",
+ "mms.data.packet-length",
+ FT_UINT16,
+ BASE_DEC,
+ NULL,
+ 0x0,
+ "", HFILL
+ }
+ },
+
+ {
+ &hf_mms_data_header_id,
+ {
+ "Header ID",
+ "mms.data.header-id",
+ FT_UINT32,
+ BASE_HEX,
+ NULL,
+ 0x0,
+ "", HFILL
+ }
+ },
+ {
+ &hf_mms_data_client_id,
+ {
+ "Client ID",
+ "mms.data.client-id",
+ FT_UINT32,
+ BASE_HEX,
+ NULL,
+ 0x0,
+ "", HFILL
+ }
+ },
+ {
+ &hf_mms_data_command_id,
+ {
+ "Command ID",
+ "mms.data.command-id",
+ FT_UINT16,
+ BASE_DEC,
+ NULL,
+ 0x0,
+ "", HFILL
+ }
+ },
+ {
+ &hf_mms_data_packet_to_resend,
+ {
+ "Packet to resend",
+ "mms.data.packet-to-resend",
+ FT_UINT32,
+ BASE_DEC,
+ NULL,
+ 0x0,
+ "", HFILL
+ }
+ },
+ };
+
+ static gint *ett[] =
+ {
+ &ett_mms_data
+ };
+
+ /* Register protocol and fields */
+ proto_mms_data = proto_register_protocol("Microsoft Media Server Data",
+ "MMS-d", "mms-d");
+ proto_register_field_array(proto_mms_data, hf, array_length(hf));
+ proto_register_subtree_array(ett, array_length(ett));
+ register_dissector("mms-d", dissect_mms_data, proto_mms_data);
+}
+
+void proto_reg_handoff_mms_data(void)
+{
+ mms_data_handle = find_dissector("mms-d");
+ dissector_add_handle("udp.port", mms_data_handle);
+ dissector_add_handle("tcp.port", mms_data_handle);
+ dissector_add("udp.port", MMS_UDP_COMMAND_PORT, mms_data_handle);
+}
+
+
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