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Fix for bug 2859: 

Skip data portion of unknown TLV.

Expand type interpretation and several other cleanups.

svn path=/trunk/; revision=26169
This commit is contained in:
Jaap Keuter 2008-09-09 21:17:17 +00:00
parent e953bf064a
commit 890cbb15d1
1 changed files with 119 additions and 89 deletions
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160
epan/dissectors/packet-homeplug.c
View File

@ -37,42 +37,6 @@
#include <epan/proto.h>
#include <epan/ptvcursor.h>
/* METYPE Values */
#define HOMEPLUG_MME_RCE 0x00
#define HOMEPLUG_MME_CER 0x01
#define HOMEPLUG_MME_RPS 0x07
#define HOMEPLUG_MME_PSR 0x08
#define HOMEPLUG_MME_NS 0x1A
/* Bit mask Operation */
#define HOMEPLUG_MCTRL_RSVD 0x80
#define HOMEPLUG_MCTRL_NE 0x7F
#define HOMEPLUG_MEHDR_MEV 0xE0
#define HOMEPLUG_MEHDR_METYPE 0x1F
#define HOMEPLUG_NS_AC 0x80
#define HOMEPLUG_NS_ICID 0x7F
#define HOMEPLUG_RCE_CEV 0xF0
#define HOMEPLUG_RCE_RSVD 0x0F
#define HOMEPLUG_CER_CERV 0xF0
#define HOMEPLUG_CER_RSVD 0x0FE0
#define HOMEPLUG_CER_RXTMI 0x1F
#define HOMEPLUG_CER_RATE 0x80
#define HOMEPLUG_CER_BP 0x40
#define HOMEPLUG_CER_VT11 0x0F
#define HOMEPLUG_CER_RSVD2 0x80
#define HOMEPLUG_CER_NBDAS 0x7F
/* Length of Network Statistics Response defines whether it is the Basic or
* the Extended Response */
#define HOMEPLUG_NS_BASIC_LEN 187
#define HOMEPLUG_NS_EXT_LEN 199
/* forward reference */
void proto_reg_handoff_homeplug(void);
@ -136,6 +100,7 @@ static int hf_homeplug_mme = -1;
/* Extended */
/* array of 6 elements */
/* static int hf_homeplug_ns_tx_bfr_0_state = -1;*/
static int hf_homeplug_data = -1;
static gint ett_homeplug = -1;
static gint ett_homeplug_mctrl = -1;
@ -147,12 +112,79 @@ static gint ett_homeplug_psr = -1;
static gint ett_homeplug_ns = -1;
static gint ett_homeplug_tone = -1;
static guint8 homeplug_ne = 0;
static guint8 homeplug_melen = 0;
static guint8 homeplug_metype = 0;
static guint32 homeplug_offset = 0;
/* METYPE Values */
#define HOMEPLUG_MME_RCE 0x00
#define HOMEPLUG_MME_CER 0x01
#define HOMEPLUG_MME_VS 0x02
#define HOMEPLUG_MME_RBA 0x03
#define HOMEPLUG_MME_SNK 0x04
#define HOMEPLUG_MME_MWR 0x05
#define HOMEPLUG_MME_CNK 0x06
#define HOMEPLUG_MME_RPS 0x07
#define HOMEPLUG_MME_PSR 0x08
#define HOMEPLUG_MME_SLP 0x19
#define HOMEPLUG_MME_NS 0x1A
#define HOMEPLUG_MME_RES 0x1B
#define HOMEPLUG_MME_PS 0x1C
#define HOMEPLUG_MME_SLO 0x1D
#define HOMEPLUG_MME_BC 0x1E
#define HOMEPLUG_MME_STC 0x1F
static const value_string homeplug_metype_vals[] = {
{ HOMEPLUG_MME_RCE, "Request Channel Estimation" },
{ HOMEPLUG_MME_CER, "Channel Estimation Response" },
{ HOMEPLUG_MME_VS , "Vendor Specific" },
{ HOMEPLUG_MME_RBA, "Replace Bridge Address" },
{ HOMEPLUG_MME_SNK, "Set Network Encryption Key" },
{ HOMEPLUG_MME_MWR, "Multicast With Response" },
{ HOMEPLUG_MME_CNK, "Confirm Network Encryption Key" },
{ HOMEPLUG_MME_RPS, "Request Parameters and Statistics" },
{ HOMEPLUG_MME_PSR, "Parameters and Statistics Response" },
{ HOMEPLUG_MME_SLP, "Set Local Parameters" },
{ HOMEPLUG_MME_NS , "Network Statistics" },
{ HOMEPLUG_MME_RES, "Reserved" },
{ HOMEPLUG_MME_PS , "Performance Statistics" },
{ HOMEPLUG_MME_SLO, "Set Local Overrides" },
{ HOMEPLUG_MME_BC , "Bridging Characteristics" },
{ HOMEPLUG_MME_STC, "Set Transmit Characteristics" },
{ 0, NULL }
};
/* Bit mask Operation */
#define HOMEPLUG_MCTRL_RSVD 0x80
#define HOMEPLUG_MCTRL_NE 0x7F
#define HOMEPLUG_MEHDR_MEV 0xE0
#define HOMEPLUG_MEHDR_METYPE 0x1F
#define HOMEPLUG_NS_AC 0x80
#define HOMEPLUG_NS_ICID 0x7F
#define HOMEPLUG_RCE_CEV 0xF0
#define HOMEPLUG_RCE_RSVD 0x0F
#define HOMEPLUG_CER_CERV 0xF0
#define HOMEPLUG_CER_RSVD 0x0FE0
#define HOMEPLUG_CER_RXTMI 0x1F
#define HOMEPLUG_CER_RATE 0x80
#define HOMEPLUG_CER_BP 0x40
#define HOMEPLUG_CER_VT11 0x0F
#define HOMEPLUG_CER_RSVD2 0x80
#define HOMEPLUG_CER_NBDAS 0x7F
/* Length of Network Statistics Response defines whether it is the Basic or
* the Extended Response */
#define HOMEPLUG_NS_BASIC_LEN 187
#define HOMEPLUG_NS_EXT_LEN 199
/* IC_ID Values */
#define HOMEPLUG_NS_ICID5130A1 0x00
#define HOMEPLUG_NS_ICID51X1USB 0x01
@ -232,7 +264,7 @@ proto_register_homeplug(void)
{ &hf_homeplug_mehdr_metype,
{ "MAC Entry Type", "homeplug.mehdr.metype",
FT_UINT8, BASE_HEX, NULL, HOMEPLUG_MEHDR_METYPE, "MAC Entry Type", HFILL }
FT_UINT8, BASE_HEX, VALS(homeplug_metype_vals), HOMEPLUG_MEHDR_METYPE, "MAC Entry Type", HFILL }
},
/* MAC Entry Len */
@ -442,9 +474,14 @@ proto_register_homeplug(void)
{ &hf_homeplug_ns_drops,
{ "Frame Drops", "homeplug.ns.drops",
FT_UINT16, BASE_DEC, NULL, 0x0, "Frame Drops", HFILL }
}
},
/* TODO Network Statistics Extended */
{ &hf_homeplug_data,
{ "Data", "homeplug.data",
FT_BYTES, BASE_NONE, NULL, 0x0, "Data", HFILL }
}
};
/* Setup protocol subtree array */
@ -460,11 +497,7 @@ proto_register_homeplug(void)
&ett_homeplug_tone
};
proto_homeplug = proto_register_protocol(
"HomePlug protocol", /* Name */
"HomePlug", /* Short Name */
"homeplug" /* Abbrev */
);
proto_homeplug = proto_register_protocol("HomePlug protocol", "HomePlug", "homeplug");
proto_register_field_array(proto_homeplug, hf, array_length(hf));
@ -498,7 +531,7 @@ static void dissect_homeplug_mehdr(ptvcursor_t * cursor)
if (!ptvcursor_tree(cursor))
return;
it = ptvcursor_add_no_advance(cursor, hf_homeplug_mehdr, 0, FALSE);
it = ptvcursor_add_no_advance(cursor, hf_homeplug_mehdr, 1, FALSE);
homeplug_metype = tvb_get_guint8(ptvcursor_tvbuff(cursor),
ptvcursor_current_offset(cursor)) & HOMEPLUG_MEHDR_METYPE;
@ -674,53 +707,47 @@ static void dissect_homeplug_ns(ptvcursor_t * cursor)
ptvcursor_add(cursor, hf_homeplug_ns_drops, 2, TRUE);
ptvcursor_pop_subtree(cursor);
} else
} else {
proto_tree_add_text(ptvcursor_tree(cursor), ptvcursor_tvbuff(cursor),
ptvcursor_current_offset(cursor), 12, "Tone Map #%d does not exist", iTone+1);
}
iTone++;
}
ptvcursor_pop_subtree(cursor);
}
/* Dissection of unknown tags */
static void dissect_homeplug_unknown(ptvcursor_t * cursor)
{
ptvcursor_add(cursor, hf_homeplug_data, homeplug_melen, FALSE);
}
static void dissect_homeplug_mme(ptvcursor_t * cursor, packet_info * pinfo)
{
if (check_col(pinfo->cinfo, COL_INFO)) {
col_append_fstr(pinfo->cinfo, COL_INFO, "%s ", val_to_str(homeplug_metype, homeplug_metype_vals, "Unknown %u"));
}
switch(homeplug_metype) {
case HOMEPLUG_MME_RCE:
if (check_col(pinfo->cinfo, COL_INFO)) {
col_clear(pinfo->cinfo, COL_INFO);
col_set_str(pinfo->cinfo, COL_INFO, "Request Channel Estimation");
}
dissect_homeplug_rce(cursor);
break;
case HOMEPLUG_MME_CER:
if (check_col(pinfo->cinfo, COL_INFO)) {
col_clear(pinfo->cinfo, COL_INFO);
col_set_str(pinfo->cinfo, COL_INFO, "Channel Estimation Response");
}
dissect_homeplug_cer(cursor);
break;
case HOMEPLUG_MME_RPS:
if (check_col(pinfo->cinfo, COL_INFO)) {
col_clear(pinfo->cinfo, COL_INFO);
col_set_str(pinfo->cinfo, COL_INFO, "Request Parameters and Statistics");
}
dissect_homeplug_rps(cursor);
break;
case HOMEPLUG_MME_PSR:
if (check_col(pinfo->cinfo, COL_INFO)) {
col_clear(pinfo->cinfo, COL_INFO);
col_set_str(pinfo->cinfo, COL_INFO, "Parameters and Statistics Response");
}
dissect_homeplug_psr(cursor);
break;
case HOMEPLUG_MME_NS:
if (check_col(pinfo->cinfo, COL_INFO)) {
col_clear(pinfo->cinfo, COL_INFO);
col_set_str(pinfo->cinfo, COL_INFO, "Network Statistics");
}
dissect_homeplug_ns(cursor);
break;
default:
dissect_homeplug_unknown(cursor);
break;
}
}
@ -770,6 +797,9 @@ dissect_homeplug(tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree)
/** homeplug_ne indicates the number of MME entries. This field is fetched
* from MCTRL.
*/
if ((homeplug_ne > 0) && check_col(pinfo->cinfo, COL_INFO)) {
col_clear(pinfo->cinfo, COL_INFO);
}
for (; homeplug_ne > 0; homeplug_ne--) {
/* Check we have enough data in tvb to read MEHDR */