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LLT(veritas): Dissect new type of packet 

Cluster use now 2 bytes length
follow with Destination Node Id and Source Node Id

Close: #18433
This commit is contained in:
Alexis La Goutte 2022-10-28 13:39:04 +00:00 committed by Uli Heilmeier
parent 58d545d5e6
commit f8efd93fc7
1 changed files with 33 additions and 10 deletions
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43
epan/dissectors/packet-llt.c
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@ -34,6 +34,8 @@ static int hf_llt_node_id = -1;
static int hf_llt_message_type = -1;
static int hf_llt_sequence_num = -1;
static int hf_llt_message_time = -1;
static int hf_llt_dst_node_id = -1;
static int hf_llt_src_node_id = -1;
/* Initialize the subtree pointers */
static gint ett_llt = -1;
@ -46,23 +48,35 @@ dissect_llt(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
proto_item *ti;
proto_tree *llt_tree;
guint8 message_type;
guint16 magic;
/* Make entries in Protocol column and Info column on summary display */
col_set_str(pinfo->cinfo, COL_PROTOCOL, "LLT");
message_type = tvb_get_guint8(tvb, 3);
magic = tvb_get_guint16(tvb, 0, ENC_BIG_ENDIAN);
if(magic == 0x0602){ /* v2 ? */
col_add_fstr(pinfo->cinfo, COL_INFO, "Message type: %s", val_to_str(message_type, message_type_vs, "Unknown (0x%02x)"));
ti = proto_tree_add_item(tree, proto_llt, tvb, 0, -1, ENC_NA);
llt_tree = proto_item_add_subtree(ti, ett_llt);
ti = proto_tree_add_item(tree, proto_llt, tvb, 0, -1, ENC_NA);
llt_tree = proto_item_add_subtree(ti, ett_llt);
proto_tree_add_item(llt_tree, hf_llt_cluster_num, tvb, 2, 2, ENC_LITTLE_ENDIAN);
proto_tree_add_item(llt_tree, hf_llt_dst_node_id, tvb, 6, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(llt_tree, hf_llt_src_node_id, tvb, 8, 1, ENC_LITTLE_ENDIAN);
proto_tree_add_item(llt_tree, hf_llt_cluster_num, tvb, 2, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(llt_tree, hf_llt_message_type, tvb, 3, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(llt_tree, hf_llt_node_id, tvb, 7, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(llt_tree, hf_llt_sequence_num, tvb, 24, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(llt_tree, hf_llt_message_time, tvb, 40, 4, ENC_BIG_ENDIAN);
} else {
message_type = tvb_get_guint8(tvb, 3);
col_add_fstr(pinfo->cinfo, COL_INFO, "Message type: %s", val_to_str(message_type, message_type_vs, "Unknown (0x%02x)"));
ti = proto_tree_add_item(tree, proto_llt, tvb, 0, -1, ENC_NA);
llt_tree = proto_item_add_subtree(ti, ett_llt);
proto_tree_add_item(llt_tree, hf_llt_cluster_num, tvb, 2, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(llt_tree, hf_llt_message_type, tvb, 3, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(llt_tree, hf_llt_node_id, tvb, 7, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(llt_tree, hf_llt_sequence_num, tvb, 24, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(llt_tree, hf_llt_message_time, tvb, 40, 4, ENC_BIG_ENDIAN);
}
return tvb_captured_length(tvb);
}
@ -92,7 +106,16 @@ proto_register_llt(void)
{ &hf_llt_message_time, { "Message time", "llt.message_time",
FT_UINT32, BASE_DEC, NULL, 0,
"Number of ticks since this node was last rebooted", HFILL } }
"Number of ticks since this node was last rebooted", HFILL } },
{ &hf_llt_dst_node_id, { "Destination Node ID", "llt.dst.node_id",
FT_UINT8, BASE_DEC, NULL, 0,
"Number identifying destination node within the cluster", HFILL } },
{ &hf_llt_src_node_id, { "Source Node ID", "llt.src.node_id",
FT_UINT8, BASE_DEC, NULL, 0,
"Number identifying source node within the cluster", HFILL } },
};
/* Setup protocol subtree array */