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-rw-r--r--epan/dissectors/packet-icp.c254
1 files changed, 254 insertions, 0 deletions
diff --git a/epan/dissectors/packet-icp.c b/epan/dissectors/packet-icp.c
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+++ b/epan/dissectors/packet-icp.c
@@ -0,0 +1,254 @@
+/* packet-icp.c
+ * Routines for ICP (internet cache protocol) packet disassembly
+ * RFC 2186 && RFC 2187
+ * By Peter Torvals
+ * Copyright 1999 Peter Torvals
+ *
+ * $Id$
+ *
+ * Ethereal - Network traffic analyzer
+ * By Gerald Combs <gerald@ethereal.com>
+ * Copyright 1998
+ *
+ * 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.
+ */
+
+#define MAX_TEXTBUF_LENGTH 600
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <glib.h>
+#include <epan/packet.h>
+#include <epan/resolv.h>
+
+static int proto_icp=-1;
+static int hf_icp_length=-1;
+static int hf_icp_opcode=-1;
+static int hf_icp_version=-1;
+static int hf_icp_request_nr=-1;
+
+static gint ett_icp = -1;
+static gint ett_icp_payload = -1;
+
+#define UDP_PORT_ICP 3130
+
+#define CODE_ICP_OP_QUERY 1
+#define CODE_ICP_OP_INVALID 0
+#define CODE_ICP_OP_HIT 2
+#define CODE_ICP_OP_MISS 3
+#define CODE_ICP_OP_ERR 4
+#define CODE_ICP_OP_SEND 5
+#define CODE_ICP_OP_SENDA 6
+#define CODE_ICP_OP_DATABEG 7
+#define CODE_ICP_OP_DATA 8
+#define CODE_ICP_OP_DATAEND 9
+#define CODE_ICP_OP_SECHO 10
+#define CODE_ICP_OP_DECHO 11
+#define CODE_ICP_OP_MISS_NOFETCH 21
+#define CODE_ICP_OP_DENIED 22
+#define CODE_ICP_OP_HIT_OBJ 23
+
+static value_string opcode_vals[] = {
+{ CODE_ICP_OP_INVALID , "ICP_INVALID" },
+{ CODE_ICP_OP_QUERY , "ICP_QUERY" },
+{ CODE_ICP_OP_HIT , "ICP_HIT" },
+{ CODE_ICP_OP_MISS , "ICP_MISS" },
+{ CODE_ICP_OP_ERR , "ICP_ERR" },
+{ CODE_ICP_OP_SEND, "ICP_SEND" },
+{ CODE_ICP_OP_SENDA, "ICP_SENDA"},
+{ CODE_ICP_OP_DATABEG, "ICP_DATABEG"},
+{ CODE_ICP_OP_DATA, "ICP_DATA"},
+{ CODE_ICP_OP_DATAEND, "ICP_DATA_END"},
+{ CODE_ICP_OP_SECHO , "ICP_SECHO"},
+{ CODE_ICP_OP_DECHO , "ICP_DECHO"},
+{ CODE_ICP_OP_MISS_NOFETCH , "ICP_MISS_NOFETCH"},
+{ CODE_ICP_OP_DENIED , "ICP_DENIED"},
+{ CODE_ICP_OP_HIT_OBJ , "ICP_HIT_OBJ"},
+{ 0, NULL}
+};
+
+static void dissect_icp_payload(tvbuff_t *tvb, int offset,
+ proto_tree *pload_tree, guint8 opcode)
+{
+ gint stringlength;
+ guint16 objectlength;
+
+ switch(opcode)
+ {
+ case CODE_ICP_OP_QUERY:
+ /* 4 byte requester host address */
+ proto_tree_add_text(pload_tree, tvb,offset,4,
+ "Requester Host Address %s",
+ ip_to_str(tvb_get_ptr(tvb, offset, 4)));
+ offset += 4;
+
+ /* null terminated URL */
+ stringlength = tvb_strsize(tvb, offset);
+ proto_tree_add_text(pload_tree, tvb, offset, stringlength,
+ "URL: %s", tvb_get_ptr(tvb, offset, stringlength));
+ break;
+
+ case CODE_ICP_OP_SECHO:
+ case CODE_ICP_OP_DECHO:
+ case CODE_ICP_OP_HIT:
+ case CODE_ICP_OP_MISS:
+ case CODE_ICP_OP_ERR:
+ case CODE_ICP_OP_MISS_NOFETCH:
+ case CODE_ICP_OP_DENIED:
+ stringlength = tvb_strsize(tvb, offset);
+ proto_tree_add_text(pload_tree, tvb, offset, stringlength,
+ "URL: %s", tvb_get_ptr(tvb, offset, stringlength));
+ break;
+
+ case CODE_ICP_OP_HIT_OBJ:
+ /* null terminated URL */
+ stringlength = tvb_strsize(tvb, offset);
+ proto_tree_add_text(pload_tree, tvb, offset, stringlength,
+ "URL: %s", tvb_get_ptr(tvb, offset, stringlength));
+ offset += stringlength;
+
+ /* 2 byte object size */
+ /* object data not recommended by standard*/
+ objectlength=tvb_get_ntohs(tvb, offset);
+ proto_tree_add_text(pload_tree, tvb,offset,2,"Object length: %u", objectlength);
+ offset += 2;
+
+ /* object data not recommended by standard*/
+ proto_tree_add_text(pload_tree, tvb,offset,objectlength,"Object data");
+ if (objectlength > tvb_reported_length_remaining(tvb, offset))
+ {
+ proto_tree_add_text(pload_tree, tvb,offset,0,
+ "Packet is fragmented, rest of object is in next udp packet");
+ }
+ break;
+ default:
+ break;
+ }
+}
+
+static void dissect_icp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
+{
+ proto_tree *icp_tree , *payload_tree;
+ proto_item *ti , *payloadtf;
+ guint8 opcode;
+ guint16 message_length;
+ guint32 request_number;
+ guint32 options;
+ guint32 option_data;
+
+ if (check_col(pinfo->cinfo, COL_PROTOCOL))
+ col_set_str(pinfo->cinfo, COL_PROTOCOL, "ICP");
+ if (check_col(pinfo->cinfo, COL_INFO))
+ col_clear(pinfo->cinfo, COL_INFO);
+
+ opcode=tvb_get_guint8(tvb, 0);
+ message_length=tvb_get_ntohs(tvb, 2);
+ request_number=tvb_get_ntohl(tvb, 4);
+
+ if (check_col(pinfo->cinfo, COL_INFO))
+ {
+ col_add_fstr(pinfo->cinfo,COL_INFO,"Opcode: %s (%u), Req Nr: %u",
+ val_to_str(opcode, opcode_vals, "Unknown"), opcode,
+ request_number);
+ }
+
+ if (tree)
+ {
+
+ ti = proto_tree_add_item(tree,proto_icp, tvb, 0, message_length, FALSE);
+ icp_tree = proto_item_add_subtree(ti, ett_icp);
+
+ proto_tree_add_uint(icp_tree,hf_icp_opcode, tvb, 0, 1, opcode);
+
+ proto_tree_add_item(icp_tree,hf_icp_version, tvb, 1, 1, FALSE);
+
+ proto_tree_add_uint(icp_tree,hf_icp_length, tvb, 2, 2, message_length);
+
+ proto_tree_add_uint(icp_tree,hf_icp_request_nr, tvb, 4, 4,
+ request_number);
+
+ options=tvb_get_ntohl(tvb, 8);
+ if ( (opcode == CODE_ICP_OP_QUERY) && ((options & 0x80000000 ) != 0) )
+ {
+ proto_tree_add_text(icp_tree, tvb,8,4,
+ "option: ICP_FLAG_HIT_OBJ");
+ }
+ if ( (opcode == CODE_ICP_OP_QUERY)&& ((options & 0x40000000 ) != 0) )
+ {
+ proto_tree_add_text(icp_tree, tvb,8,4,
+ "option:ICP_FLAG_SRC_RTT");
+ }
+ if ((opcode != CODE_ICP_OP_QUERY)&& ((options & 0x40000000 ) != 0))
+ {
+ option_data=tvb_get_ntohl(tvb, 12);
+ proto_tree_add_text(icp_tree, tvb,8,8,
+ "option: ICP_FLAG_SCR_RTT RTT=%u",
+ option_data & 0x0000ffff);
+ }
+
+ proto_tree_add_text(icp_tree, tvb, 16, 4,
+ "Sender Host IP address %s",
+ ip_to_str(tvb_get_ptr(tvb, 16, 4)));
+
+ payloadtf = proto_tree_add_text(icp_tree, tvb,
+ 20, message_length - 20,
+ "Payload");
+ payload_tree = proto_item_add_subtree(payloadtf, ett_icp_payload);
+ dissect_icp_payload(tvb, 20, payload_tree, opcode);
+ }
+}
+void
+proto_register_icp(void)
+{
+ static hf_register_info hf[] = {
+ { &hf_icp_opcode,
+ { "Opcode", "icp.opcode", FT_UINT8, BASE_HEX, VALS(opcode_vals),
+ 0x0, "", HFILL }},
+
+ { &hf_icp_version,
+ { "Version", "icp.version", FT_UINT8, BASE_DEC, NULL,
+ 0x0, "", HFILL }},
+
+ { &hf_icp_length,
+ { "Length", "icp.length", FT_UINT16, BASE_DEC, NULL,
+ 0x0, "", HFILL }},
+
+ { &hf_icp_request_nr,
+ { "Request Number", "icp.nr", FT_UINT32, BASE_DEC, NULL,
+ 0x0, "", HFILL }},
+ };
+ static gint *ett[] = {
+ &ett_icp,
+ &ett_icp_payload,
+ };
+
+ proto_icp = proto_register_protocol("Internet Cache Protocol",
+ "ICP", "icp");
+ proto_register_field_array(proto_icp, hf, array_length(hf));
+ proto_register_subtree_array(ett, array_length(ett));
+}
+
+void
+proto_reg_handoff_icp(void)
+{
+ dissector_handle_t icp_handle;
+
+ icp_handle = create_dissector_handle(dissect_icp, proto_icp);
+ dissector_add("udp.port", UDP_PORT_ICP, icp_handle);
+}
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