static int dissect_pathport_common(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
/* Set up structures needed to add the protocol subtree and manage it */
proto_item *ti;
proto_tree *pathport_tree;
guint offset = 0;
guint remaining_len;
guint len;
guint16 type;
guint32 srcid;
guint32 dstid;
len = tvb_reported_length(tvb);
/* Set the Protocol column to the constant string of Pathport */
col_set_str(pinfo->cinfo, COL_PROTOCOL, "Pathport");
/* Set the info column to reflect the first PDU in the packet */
col_clear(pinfo->cinfo, COL_INFO);
srcid = tvb_get_ntohl(tvb, PATHPORT_HEADER_SRCID_OFFSET);
type = tvb_get_ntohs(tvb, PATHPORT_HEADER_LENGTH);
if(type == PP_ARP_REQUEST)
{
dstid = tvb_get_ntohl(tvb, PATHPORT_HEADER_DSTID_OFFSET);
col_add_fstr(pinfo->cinfo, COL_INFO, "Who has %s? Tell %s",
resolve_pp_id(dstid), resolve_pp_id(srcid));
}
else
{
if((type == PP_ARP_REPLY) && (len >= 36))
{
guint32 id = tvb_get_ntohl(tvb, 24);
col_add_fstr(pinfo->cinfo, COL_INFO, "%s is at %s", resolve_pp_id(id), tvb_ip_to_str(tvb, 28));
}
else if((type == PP_DATA) && (len >= 32))
{
guint16 xdmx_start = tvb_get_ntohs(tvb, 30);
col_add_fstr(pinfo->cinfo, COL_INFO, "xDMX Data - %d channels @ %d (Univ %d.%d)",
tvb_get_ntohs(tvb, 26),
xdmx_start, xdmx_start / 512 + 1, xdmx_start % 512);
}
else /* default */
{
col_add_fstr(pinfo->cinfo, COL_INFO, "%s", val_to_str(type, pp_pdu_vals, TYPE_UNKNOWN));
}
}
if(tree == NULL)
return tvb_reported_length(tvb);
/* create display subtree for the protocol */
ti = proto_tree_add_item(tree, proto_pathport, tvb, 0, -1, ENC_NA);
pathport_tree = proto_item_add_subtree(ti, ett_pathport);
offset = dissect_header(tvb, pathport_tree, PATHPORT_HEADER_OFFSET);
remaining_len = tvb_reported_length_remaining(tvb, offset);
offset = dissect_multiple_pdus(tvb, tree, offset, remaining_len);
return offset;
}
static void
dissect_message(tvbuff_t *message_tvb, packet_info *pinfo, proto_item *m2pa_item, proto_tree *m2pa_tree, proto_tree *tree)
{
dissect_header(message_tvb, pinfo, m2pa_tree);
dissect_message_data(message_tvb, pinfo, m2pa_item, m2pa_tree, tree);
}