444 lines
13 KiB
C
444 lines
13 KiB
C
/* msg_arq.c
|
|
* WiMax MAC Management ARQ Feedback, Discard, Reset Message decoders
|
|
*
|
|
* Copyright (c) 2007 by Intel Corporation.
|
|
*
|
|
* Author: John R. Underwood <junderx@yahoo.com>
|
|
*
|
|
* Wireshark - Network traffic analyzer
|
|
* By Gerald Combs <gerald@wireshark.org>
|
|
* Copyright 1999 Gerald Combs
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0-or-later
|
|
*/
|
|
|
|
/* Include files */
|
|
|
|
#include "config.h"
|
|
|
|
|
|
#include <epan/packet.h>
|
|
#include "wimax_mac.h"
|
|
|
|
void proto_register_mac_mgmt_msg_arq_feedback(void);
|
|
void proto_reg_handoff_mac_mgmt_msg_arq(void);
|
|
|
|
static gint proto_mac_mgmt_msg_arq_decoder = -1;
|
|
|
|
static gint ett_mac_mgmt_msg_arq_decoder = -1;
|
|
|
|
/* Setup protocol subtree array */
|
|
static gint *ett[] =
|
|
{
|
|
&ett_mac_mgmt_msg_arq_decoder,
|
|
};
|
|
|
|
|
|
/* ARQ fields */
|
|
static gint hf_arq_cid = -1;
|
|
static gint hf_arq_last = -1;
|
|
static gint hf_arq_ack_type = -1;
|
|
static gint hf_ack_type_reserved = -1;
|
|
static gint hf_arq_bsn = -1;
|
|
static gint hf_arq_num_ack_maps = -1;
|
|
static gint hf_arq_selective_map = -1;
|
|
static gint hf_arq_seq_format = -1;
|
|
static gint hf_arq_0seq_ack_map = -1;
|
|
static gint hf_arq_0seq1_len = -1;
|
|
static gint hf_arq_0seq2_len = -1;
|
|
static gint hf_arq_1seq_ack_map = -1;
|
|
static gint hf_arq_1seq1_len = -1;
|
|
static gint hf_arq_1seq2_len = -1;
|
|
static gint hf_arq_1seq3_len = -1;
|
|
static gint hf_arq_reserved = -1;
|
|
|
|
static gint hf_arq_discard_cid = -1;
|
|
static gint hf_arq_discard_reserved = -1;
|
|
static gint hf_arq_discard_bsn = -1;
|
|
|
|
static gint hf_arq_reset_cid = -1;
|
|
static gint hf_arq_reset_type = -1;
|
|
static gint hf_arq_reset_direction = -1;
|
|
static gint hf_arq_reset_reserved = -1;
|
|
|
|
/* STRING RESOURCES */
|
|
|
|
#if 0
|
|
static const true_false_string tfs_present = {
|
|
"present",
|
|
"absent"
|
|
};
|
|
#endif
|
|
|
|
#if 0
|
|
static const true_false_string tfs_rng_req_aas_broadcast = {
|
|
"SS cannot receive broadcast messages",
|
|
"SS can receive broadcast messages"
|
|
};
|
|
#endif
|
|
|
|
static const true_false_string tfs_arq_last = {
|
|
"Last ARQ feedback IE in the list",
|
|
"More ARQ feedback IE in the list"
|
|
};
|
|
|
|
static const value_string vals_arq_ack_type[] = {
|
|
{0, "Selective ACK entry"},
|
|
{1, "Cumulative ACK entry"},
|
|
{2, "Cumulative with Selective ACK entry"},
|
|
{3, "Cumulative ACK with Block Sequence Ack entry"},
|
|
{0, NULL}
|
|
};
|
|
|
|
static const value_string vals_arq_reset_type[] = {
|
|
{0, "Original message from Initiator"},
|
|
{1, "Acknowledgment from Responder"},
|
|
{2, "Confirmation from Initiator"},
|
|
{3, "Reserved"},
|
|
{0, NULL}
|
|
};
|
|
|
|
static const value_string vals_arq_reset_direction[] = {
|
|
{0, "Uplink or downlink"},
|
|
{1, "Uplink"},
|
|
{2, "Downlink"},
|
|
{3, "Reserved"},
|
|
{0, NULL}
|
|
};
|
|
|
|
/* Register Wimax Mac Payload Protocol and Dissector */
|
|
void proto_register_mac_mgmt_msg_arq_feedback(void)
|
|
{
|
|
/* ARQ fields display */
|
|
static hf_register_info hf[] =
|
|
{
|
|
{
|
|
&hf_arq_ack_type,
|
|
{
|
|
"ACK Type", "wmx.arq.ack_type",
|
|
FT_UINT8, BASE_DEC, VALS(vals_arq_ack_type), 0x60, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_arq_bsn,
|
|
{
|
|
"BSN", "wmx.arq.bsn",
|
|
FT_UINT16, BASE_DEC, NULL, 0x1FFC, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_arq_cid,
|
|
{
|
|
"Connection ID", "wmx.arq.cid",
|
|
FT_UINT16, BASE_DEC, NULL, 0x00, "The ID of the connection being referenced", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_arq_discard_bsn,
|
|
{
|
|
"BSN", "wmx.arq.discard_bsn",
|
|
FT_UINT16, BASE_DEC, NULL, 0x07FF, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_arq_discard_cid,
|
|
{
|
|
"Connection ID", "wmx.arq.discard_cid",
|
|
FT_UINT16, BASE_DEC, NULL, 0x00, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_arq_discard_reserved,
|
|
{
|
|
"Reserved", "wmx.arq.discard_reserved",
|
|
FT_UINT8, BASE_DEC, NULL, 0xF8, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_arq_last,
|
|
{
|
|
"LAST", "wmx.arq.last",
|
|
FT_BOOLEAN, 8, TFS(&tfs_arq_last), 0x80, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_arq_num_ack_maps,
|
|
{
|
|
"Number of ACK Maps", "wmx.arq.num_maps",
|
|
FT_UINT8, BASE_DEC, NULL, 0x03, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_arq_reserved,
|
|
{
|
|
"Reserved", "wmx.arq.reserved",
|
|
FT_UINT8, BASE_DEC, NULL, 0x01, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_arq_reset_cid,
|
|
{
|
|
"Connection ID", "wmx.arq.reset_cid",
|
|
FT_UINT16, BASE_DEC, NULL, 0x00, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_arq_reset_direction,
|
|
{
|
|
"Direction", "wmx.arq.reset_direction",
|
|
FT_UINT8, BASE_DEC, VALS(vals_arq_reset_direction), 0x30, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_arq_reset_reserved,
|
|
{
|
|
"Reserved", "wmx.arq.reset_reserved",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0F, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_arq_reset_type,
|
|
{
|
|
"Type", "wmx.arq.reset_type",
|
|
FT_UINT8, BASE_DEC, VALS(vals_arq_reset_type), 0xC0, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_arq_selective_map,
|
|
{
|
|
"Selective ACK Map", "wmx.arq.selective_map",
|
|
FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_arq_0seq_ack_map,
|
|
{
|
|
"Sequence ACK Map", "wmx.arq.seq_ack_map",
|
|
FT_UINT8, BASE_HEX, NULL, 0x60, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_arq_1seq_ack_map,
|
|
{
|
|
"Sequence ACK Map", "wmx.arq.seq_ack_map",
|
|
FT_UINT8, BASE_HEX, NULL, 0x70, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_arq_seq_format,
|
|
{
|
|
"Sequence Format", "wmx.arq.seq_format",
|
|
FT_UINT8, BASE_DEC, NULL, 0x80, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_arq_0seq1_len,
|
|
{
|
|
"Sequence 1 Length", "wmx.arq.seq1_len",
|
|
FT_UINT16, BASE_DEC, NULL, 0x1F80, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_arq_0seq2_len,
|
|
{
|
|
"Sequence 2 Length", "wmx.arq.seq2_len",
|
|
FT_UINT16, BASE_DEC, NULL, 0x007E, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_arq_1seq1_len,
|
|
{
|
|
"Sequence 1 Length", "wmx.arq.seq1_len",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0F, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_arq_1seq2_len,
|
|
{
|
|
"Sequence 2 Length", "wmx.arq.seq2_len",
|
|
FT_UINT8, BASE_DEC, NULL, 0xF0, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_arq_1seq3_len,
|
|
{
|
|
"Sequence 3 Length", "wmx.arq.seq3_len",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0F, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_ack_type_reserved,
|
|
{
|
|
"Reserved", "wmx.ack_type.reserved",
|
|
FT_UINT8, BASE_DEC, NULL, 0x03, NULL, HFILL
|
|
}
|
|
}
|
|
};
|
|
|
|
proto_mac_mgmt_msg_arq_decoder = proto_register_protocol (
|
|
"WiMax ARQ Feedback/Discard/Reset Messages", /* name */
|
|
"WiMax ARQ Feedback/Discard/Reset (arq)", /* short name */
|
|
"wmx.arq" /* abbrev */
|
|
);
|
|
|
|
proto_register_field_array(proto_mac_mgmt_msg_arq_decoder, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
}
|
|
|
|
/* Decode ARQ-Feedback messages. */
|
|
static int dissect_mac_mgmt_msg_arq_feedback_decoder(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, void* data _U_)
|
|
{
|
|
guint offset = 0;
|
|
guint arq_feedback_ie_count = 0;
|
|
guint arq_cid;
|
|
gboolean arq_last = FALSE;
|
|
guint arq_ack_type;
|
|
guint arq_bsn;
|
|
guint arq_num_ack_maps;
|
|
guint tvb_len;
|
|
proto_item *arq_feedback_item;
|
|
proto_tree *arq_feedback_tree;
|
|
proto_item *arq_fb_item = NULL;
|
|
proto_tree *arq_fb_tree = NULL;
|
|
proto_item *ti = NULL;
|
|
guint i, seq_format;
|
|
|
|
{ /* we are being asked for details */
|
|
|
|
/* Get the tvb reported length */
|
|
tvb_len = tvb_reported_length(tvb);
|
|
/* display MAC payload type ARQ-Feedback */
|
|
arq_feedback_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_arq_decoder, tvb, offset, -1, "MAC Management Message, ARQ-Feedback");
|
|
/* add MAC ARQ Feedback subtree */
|
|
arq_feedback_tree = proto_item_add_subtree(arq_feedback_item, ett_mac_mgmt_msg_arq_decoder);
|
|
|
|
while(offset < tvb_len && !arq_last)
|
|
{
|
|
arq_feedback_ie_count++;
|
|
arq_cid = tvb_get_ntohs(tvb, offset);
|
|
arq_last = ((tvb_get_guint8(tvb, offset + 2) & 0x80) != 0);
|
|
arq_ack_type = (tvb_get_guint8(tvb, offset + 2) & 0x60) >> 5;
|
|
arq_bsn = (tvb_get_ntohs(tvb, offset + 2) & 0x1FFC) >> 2;
|
|
arq_num_ack_maps = 1 + (tvb_get_guint8(tvb, offset + 3) & 0x03);
|
|
|
|
arq_fb_item = proto_tree_add_protocol_format(arq_feedback_tree, proto_mac_mgmt_msg_arq_decoder, tvb, offset, tvb_len, "ARQ_Feedback_IE");
|
|
proto_item_append_text(arq_fb_item, ", CID: %u, %s ARQ feedback IE, %s, BSN: %u",
|
|
arq_cid, arq_last ? "Last" : "More", val_to_str_const(arq_ack_type, vals_arq_ack_type, ""), arq_bsn);
|
|
if (arq_ack_type != ARQ_CUMULATIVE_ACK_ENTRY) {
|
|
proto_item_append_text(arq_fb_item, ", %u ACK Map(s)", arq_num_ack_maps);
|
|
}
|
|
/* add ARQ Feedback IE subtree */
|
|
arq_fb_tree = proto_item_add_subtree(arq_fb_item, ett_mac_mgmt_msg_arq_decoder);
|
|
proto_tree_add_item(arq_fb_tree, hf_arq_cid, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(arq_fb_tree, hf_arq_last, tvb, offset + 2, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(arq_fb_tree, hf_arq_ack_type, tvb, offset + 2, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(arq_fb_tree, hf_arq_bsn, tvb, offset + 2, 2, ENC_BIG_ENDIAN);
|
|
if (arq_ack_type != ARQ_CUMULATIVE_ACK_ENTRY) {
|
|
ti = proto_tree_add_item(arq_fb_tree, hf_arq_num_ack_maps, tvb, offset + 3, 1, ENC_BIG_ENDIAN);
|
|
proto_item_append_text(ti, " (%d map(s))", arq_num_ack_maps);
|
|
offset += 2;
|
|
|
|
for (i = 0; i < arq_num_ack_maps; i++) {
|
|
/* Each ACK Map is 16 bits. */
|
|
offset += 2;
|
|
if (arq_ack_type != 3) {
|
|
proto_tree_add_item(arq_fb_tree, hf_arq_selective_map, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
} else {
|
|
proto_tree_add_item(arq_fb_tree, hf_arq_seq_format, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
seq_format = (tvb_get_guint8(tvb, offset) & 0x80) >> 7;
|
|
if (seq_format == 0) {
|
|
proto_tree_add_item(arq_fb_tree, hf_arq_0seq_ack_map, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(arq_fb_tree, hf_arq_0seq1_len, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(arq_fb_tree, hf_arq_0seq2_len, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(arq_fb_tree, hf_arq_reserved, tvb, offset + 1, 1, ENC_BIG_ENDIAN);
|
|
} else {
|
|
proto_tree_add_item(arq_fb_tree, hf_arq_1seq_ack_map, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(arq_fb_tree, hf_arq_1seq1_len, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(arq_fb_tree, hf_arq_1seq2_len, tvb, offset + 1, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(arq_fb_tree, hf_arq_1seq3_len, tvb, offset + 1, 1, ENC_BIG_ENDIAN);
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
/* Number of ACK Maps bits are reserved when ACK TYPE == 1 */
|
|
proto_tree_add_item(arq_fb_tree, hf_ack_type_reserved, tvb, offset + 3, 1, ENC_BIG_ENDIAN);
|
|
/* update the offset */
|
|
offset += 2;
|
|
}
|
|
/* update the offset */
|
|
offset += 2;
|
|
}
|
|
proto_item_append_text(arq_feedback_item, ", %u ARQ_feedback_IE(s)", arq_feedback_ie_count);
|
|
}
|
|
return tvb_captured_length(tvb);
|
|
}
|
|
|
|
/* Decode ARQ-Discard messages. */
|
|
static int dissect_mac_mgmt_msg_arq_discard_decoder(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, void* data _U_)
|
|
{
|
|
proto_item *arq_discard_item;
|
|
proto_tree *arq_discard_tree;
|
|
|
|
{ /* we are being asked for details */
|
|
|
|
/* display MAC payload type ARQ-Discard */
|
|
arq_discard_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_arq_decoder, tvb, 0, -1, "MAC Management Message, ARQ-Discard");
|
|
/* add MAC ARQ Discard subtree */
|
|
arq_discard_tree = proto_item_add_subtree(arq_discard_item, ett_mac_mgmt_msg_arq_decoder);
|
|
|
|
proto_tree_add_item(arq_discard_tree, hf_arq_discard_cid, tvb, 1, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(arq_discard_tree, hf_arq_discard_reserved, tvb, 3, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(arq_discard_tree, hf_arq_discard_bsn, tvb, 3, 2, ENC_BIG_ENDIAN);
|
|
}
|
|
return tvb_captured_length(tvb);
|
|
}
|
|
|
|
/* Decode ARQ-Reset messages. */
|
|
static int dissect_mac_mgmt_msg_arq_reset_decoder(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, void* data _U_)
|
|
{
|
|
proto_item *arq_reset_item;
|
|
proto_tree *arq_reset_tree;
|
|
|
|
{ /* we are being asked for details */
|
|
|
|
/* display MAC payload type ARQ-Reset */
|
|
arq_reset_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_arq_decoder, tvb, 0, -1, "MAC Management Message, ARQ-Reset");
|
|
/* add MAC ARQ Reset subtree */
|
|
arq_reset_tree = proto_item_add_subtree(arq_reset_item, ett_mac_mgmt_msg_arq_decoder);
|
|
|
|
proto_tree_add_item(arq_reset_tree, hf_arq_reset_cid, tvb, 1, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(arq_reset_tree, hf_arq_reset_type, tvb, 3, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(arq_reset_tree, hf_arq_reset_direction, tvb, 3, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(arq_reset_tree, hf_arq_reset_reserved, tvb, 3, 1, ENC_BIG_ENDIAN);
|
|
}
|
|
return tvb_captured_length(tvb);
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_mac_mgmt_msg_arq(void)
|
|
{
|
|
dissector_handle_t arq_handle;
|
|
|
|
arq_handle = create_dissector_handle(dissect_mac_mgmt_msg_arq_feedback_decoder, proto_mac_mgmt_msg_arq_decoder);
|
|
dissector_add_uint("wmx.mgmtmsg", MAC_MGMT_MSG_ARQ_FEEDBACK, arq_handle);
|
|
|
|
arq_handle = create_dissector_handle(dissect_mac_mgmt_msg_arq_discard_decoder, proto_mac_mgmt_msg_arq_decoder);
|
|
dissector_add_uint("wmx.mgmtmsg", MAC_MGMT_MSG_ARQ_DISCARD, arq_handle);
|
|
|
|
arq_handle = create_dissector_handle(dissect_mac_mgmt_msg_arq_reset_decoder, proto_mac_mgmt_msg_arq_decoder);
|
|
dissector_add_uint("wmx.mgmtmsg", MAC_MGMT_MSG_ARQ_RESET, arq_handle);
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - https://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 8
|
|
* tab-width: 8
|
|
* indent-tabs-mode: t
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
|
|
* :indentSize=8:tabSize=8:noTabs=false:
|
|
*/
|