Is it possible to load an xml file to a custom plugin c dissector?

edit

In general, you can add any proto items as many times as you like, simply use a different tree pointer.

i have it like that:

static int iol_timestamp(tvbuff_t *tvb)
{
    nstime_t time;

    /* get timestamp */
    times.secs = tvb_get_guint64(tvb, 3, ENC_LITTLE_ENDIAN) / 1000000000ULL;
    times.nsecs = tvb_get_guint64(tvb, 3, ENC_LITTLE_ENDIAN) % 1000000000ULL;

    return time;
}

static int iol_master(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint32 offset)
{
    proto_item *iol_master_item = NULL;
    proto_tree *iol_master_tree = NULL;
    nstime_t time;

    /* add tree for actual iolink data (master command, check type) */ 

    iol_master_item = proto_tree_add_item(tree, proto_iolink, tvb, offset, 2, ENC_NA);
    proto_item_append_text(iol_master_item, " M-sequence [Master]");

    /* create a subtree */

    iol_master_tree = proto_item_add_subtree(iol_master_item, ett_iolink_frame);

    /* add bitmask for master command byte -> |r/w (7)| |communication channel (6,5)| |address (4-0)| */

    proto_tree_add_bitmask(iol_master_tree, tvb, offset, hf_iolink_mc, ett_iolink_frame, hf_iolink_mc_bits, ENC_LITTLE_ENDIAN);

    **time = iol_timestamp(tvb);
    proto_tree_add_time(iol_master_tree, hf_iolink_time, tvb, offset, 8, &time);**

    offset += 1; // increment offset (1byte)
...
return offset;
}

but like this no timestamp is displayed beneath the master command bitfield.

So you suggest just to create one more tree pointer, am i getting this right?

iol_timestamp() should return nstime_t, not an int. The rest looks OK.

yes sure nstime_t instead of int i already changed this in my code. thanks. I will try it again and see if it works.