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/* packet-iperf.c
* Routines for iPerf dissection
* By Anish Bhatt <anish@gatech.edu>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <epan/packet.h>
#define IPERF2_HDR_SIZE 24
#define IPERF2_UDP_HDR_SIZE 12
void proto_register_iperf2(void);
void proto_reg_handoff_iperf2(void);
static int proto_iperf2 = -1;
static int hf_iperf2_sequence = -1;
static int hf_iperf2_sec = -1;
static int hf_iperf2_usec = -1;
static int hf_iperf2_flags = -1;
static int hf_iperf2_num_threads = -1;
static int hf_iperf2_mport = -1;
static int hf_iperf2_bufferlen = -1;
static int hf_iperf2_mwinband = -1;
static int hf_iperf2_mamount = -1;
static gint ett_iperf2 = -1;
static gint ett_udphdr = -1;
static gint ett_client_hdr = -1;
static dissector_handle_t iperf2_handle_tcp = NULL;
static dissector_handle_t iperf2_handle_udp = NULL;
static int
dissect_iperf2(tvbuff_t *tvb, proto_tree *iperf2_tree, guint32 offset)
{
proto_tree *client_tree;
client_tree = proto_tree_add_subtree(iperf2_tree, tvb, offset, IPERF2_HDR_SIZE, ett_client_hdr, NULL, "iPerf2 Client Header");
proto_tree_add_item(client_tree, hf_iperf2_flags, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(client_tree, hf_iperf2_num_threads, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(client_tree, hf_iperf2_mport, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(client_tree, hf_iperf2_bufferlen, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(client_tree, hf_iperf2_mwinband, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(client_tree, hf_iperf2_mamount, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
return offset;
}
static int
dissect_iperf2_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void * data _U_)
{
proto_item *ti;
proto_tree *iperf2_tree;
/*There is probably a better way to do this, for now ignore any TCP packet with payload
> 24 bytes as only the first packet with a 24 byte payload has iperf headers. One way might
be to check header flags, as there are only two possible values */
if (tvb_reported_length(tvb) > IPERF2_HDR_SIZE)
return 0;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "iPerf2");
/* Clear out stuff in the info column */
col_clear(pinfo->cinfo, COL_INFO);
ti = proto_tree_add_item(tree, proto_iperf2, tvb, 0, IPERF2_HDR_SIZE, ENC_NA);
iperf2_tree = proto_item_add_subtree(ti, ett_iperf2);
return dissect_iperf2(tvb, iperf2_tree, 0);
}
static int
dissect_iperf2_udp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void * data _U_)
{
guint32 offset = 0;
guint32 hdr_size = IPERF2_HDR_SIZE + IPERF2_UDP_HDR_SIZE;
proto_item *ti;
proto_tree *iperf2_tree, *udp_tree;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "iPerf2");
/* Clear out stuff in the info column */
col_clear(pinfo->cinfo, COL_INFO);
ti = proto_tree_add_item(tree, proto_iperf2, tvb, offset, hdr_size, ENC_NA);
iperf2_tree = proto_item_add_subtree(ti, ett_iperf2);
udp_tree = proto_tree_add_subtree(iperf2_tree, tvb, offset, IPERF2_UDP_HDR_SIZE, ett_udphdr, NULL, "iPerf2 UDP Header");
proto_tree_add_item(udp_tree, hf_iperf2_sequence, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(udp_tree, hf_iperf2_sec, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(udp_tree, hf_iperf2_usec, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
return dissect_iperf2(tvb, iperf2_tree, offset);
}
void
proto_register_iperf2(void)
{
/* Setup list of header fields */
static hf_register_info hf[] = {
{ &hf_iperf2_sequence,
{ "iPerf2 sequence", "iperf2.udp.sequence", FT_INT32, BASE_DEC,
NULL, 0, NULL, HFILL }
},
{ &hf_iperf2_sec,
{ "iPerf2 sec", "iperf2.udp.sec", FT_UINT32, BASE_DEC,
NULL, 0, NULL, HFILL }
},
{ &hf_iperf2_usec,
{ "iPerf2 usec", "iperf2.udp.usec", FT_UINT32, BASE_DEC,
NULL, 0, NULL, HFILL }
},
{ &hf_iperf2_flags,
{ "Flags", "iperf2.client.flags", FT_UINT32, BASE_DEC,
NULL, 0, NULL, HFILL }
},
{ &hf_iperf2_num_threads,
{ "Number of Threads", "iperf2.client.numthreads", FT_UINT32, BASE_DEC,
NULL, 0, NULL, HFILL }
},
{ &hf_iperf2_mport,
{ "Server Port", "iperf2.client.port", FT_UINT32, BASE_DEC,
NULL, 0, NULL, HFILL }
},
{ &hf_iperf2_bufferlen,
{ "Buffer Len", "iperf2.client.bufferlen", FT_UINT32, BASE_DEC,
NULL, 0, NULL, HFILL }
},
{ &hf_iperf2_mwinband,
{ "Bandwidth", "iperf2.client.bandwidth", FT_UINT32, BASE_HEX,
NULL, 0, NULL, HFILL }
},
{ &hf_iperf2_mamount,
{ "Number of Bytes", "iperf2.client.num_bytes", FT_UINT32, BASE_HEX,
NULL, 0, NULL, HFILL }
},
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_iperf2,
&ett_udphdr,
&ett_client_hdr
};
/* Register the protocol name and description */
proto_iperf2 = proto_register_protocol("iPerf2 Packet Data", "iPerf2", "iperf2");
proto_register_field_array(proto_iperf2, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
iperf2_handle_tcp = register_dissector("iperf2_tcp", dissect_iperf2_tcp, proto_iperf2);
iperf2_handle_udp = register_dissector("iperf2_udp", dissect_iperf2_udp, proto_iperf2);
}
void
proto_reg_handoff_iperf2(void)
{
dissector_add_for_decode_as_with_preference("tcp.port", iperf2_handle_tcp);
dissector_add_for_decode_as_with_preference("udp.port", iperf2_handle_udp);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* vi: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
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