/*
* Function for AVP flags dissector.
*/
static void
dissect_pana_avp_flags(proto_tree *parent_tree, tvbuff_t *tvb, int offset, guint16 flags)
{
static const int * flag_fields[] = {
&hf_pana_avp_flag_v,
NULL,
};
proto_tree_add_bitmask_value_with_flags(parent_tree, tvb, offset, hf_pana_avp_flags,
ett_pana_avp_flags, flag_fields, flags, BMT_NO_TFS|BMT_NO_FALSE);
}
static void
dissect_sita(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_item *ti;
guchar flags, signals, errors1, errors2, proto;
const gchar *errors1_string, *errors2_string, *flags_string;
proto_tree *sita_tree = NULL;
proto_tree *sita_flags_tree = NULL;
proto_tree *sita_errors1_tree = NULL;
proto_tree *sita_errors2_tree = NULL;
static const gchar *rx_errors1_str[] = {"Framing", "Parity", "Collision", "Long-frame", "Short-frame", "", "", "" };
static const gchar *rx_errors2_str[] = {"Non-Aligned", "Abort", "CD-lost", "DPLL", "Overrun", "Length", "CRC", "Break" };
#if 0
static const gchar *tx_errors1_str[] = {"", "", "", "", "", "", "", "" };
#endif
static const gchar *tx_errors2_str[] = {"Underrun", "CTS-lost", "UART", "ReTx-limit", "", "", "", "" };
static const gchar *flags_str[] = {"", "", "", "", "", "", "", "No-buffers" };
static const int * signal_flags[] = {
&hf_dcd,
&hf_rts,
&hf_cts,
&hf_dtr,
&hf_dsr,
NULL
};
col_clear(pinfo->cinfo, COL_PROTOCOL); /* erase the protocol */
col_clear(pinfo->cinfo, COL_INFO); /* and info columns so that the next decoder can fill them in */
flags = pinfo->pseudo_header->sita.sita_flags;
signals = pinfo->pseudo_header->sita.sita_signals;
errors1 = pinfo->pseudo_header->sita.sita_errors1;
errors2 = pinfo->pseudo_header->sita.sita_errors2;
proto = pinfo->pseudo_header->sita.sita_proto;
if ((flags & SITA_FRAME_DIR) == SITA_FRAME_DIR_TXED) {
col_set_str(pinfo->cinfo, COL_DEF_SRC, IOP); /* set the source (direction) column accordingly */
} else {
col_set_str(pinfo->cinfo, COL_DEF_SRC, REMOTE);
}
col_set_str(pinfo->cinfo, COL_INFO, "");
if (tree) {
ti = proto_tree_add_protocol_format(tree, proto_sita, tvb, 0, 0, "Link Layer");
sita_tree = proto_item_add_subtree(ti, ett_sita);
proto_tree_add_uint(sita_tree, hf_proto, tvb, 0, 0, proto);
flags_string = format_flags_string(flags, flags_str);
sita_flags_tree = proto_tree_add_subtree_format(sita_tree, tvb, 0, 0,
ett_sita_flags, NULL, "Flags: 0x%02x (From %s)%s%s",
flags,
((flags & SITA_FRAME_DIR) == SITA_FRAME_DIR_TXED) ? IOP : REMOTE,
strlen(flags_string) ? ", " : "",
flags_string);
proto_tree_add_boolean(sita_flags_tree, hf_droppedframe, tvb, 0, 0, flags);
proto_tree_add_boolean(sita_flags_tree, hf_dir, tvb, 0, 0, flags);
proto_tree_add_bitmask_value_with_flags(sita_tree, tvb, 0, hf_signals, ett_sita_signals,
signal_flags, signals, BMT_NO_FALSE|BMT_NO_TFS);
if ((flags & SITA_FRAME_DIR) == SITA_FRAME_DIR_RXED) {
errors1_string = format_flags_string(errors1, rx_errors1_str);
sita_errors1_tree = proto_tree_add_subtree_format(sita_tree, tvb, 0, 0,
ett_sita_errors1, NULL, "Receive Status: 0x%02x %s", errors1, errors1_string);
proto_tree_add_boolean(sita_errors1_tree, hf_shortframe, tvb, 0, 0, errors1);
proto_tree_add_boolean(sita_errors1_tree, hf_longframe, tvb, 0, 0, errors1);
proto_tree_add_boolean(sita_errors1_tree, hf_collision, tvb, 0, 0, errors1);
proto_tree_add_boolean(sita_errors1_tree, hf_parity, tvb, 0, 0, errors1);
proto_tree_add_boolean(sita_errors1_tree, hf_framing, tvb, 0, 0, errors1);
errors2_string = format_flags_string(errors2, rx_errors2_str);
sita_errors2_tree = proto_tree_add_subtree_format(sita_tree, tvb, 0, 0,
ett_sita_errors2, NULL, "Receive Status: 0x%02x %s", errors2, errors2_string);
proto_tree_add_boolean(sita_errors2_tree, hf_break, tvb, 0, 0, errors2);
proto_tree_add_boolean(sita_errors2_tree, hf_crc, tvb, 0, 0, errors2);
proto_tree_add_boolean(sita_errors2_tree, hf_length, tvb, 0, 0, errors2);
proto_tree_add_boolean(sita_errors2_tree, hf_overrun, tvb, 0, 0, errors2);
proto_tree_add_boolean(sita_errors2_tree, hf_rxdpll, tvb, 0, 0, errors2);
proto_tree_add_boolean(sita_errors2_tree, hf_lostcd, tvb, 0, 0, errors2);
proto_tree_add_boolean(sita_errors2_tree, hf_abort, tvb, 0, 0, errors2);
proto_tree_add_boolean(sita_errors2_tree, hf_nonaligned, tvb, 0, 0, errors2);
} else {
errors2_string = format_flags_string(errors2, tx_errors2_str);
sita_errors1_tree = proto_tree_add_subtree_format(sita_tree, tvb, 0, 0,
ett_sita_errors1, NULL, "Transmit Status: 0x%02x %s", errors2, errors2_string);
proto_tree_add_boolean(sita_errors1_tree, hf_rtxlimit, tvb, 0, 0, errors2);
proto_tree_add_boolean(sita_errors1_tree, hf_uarterror, tvb, 0, 0, errors2);
proto_tree_add_boolean(sita_errors1_tree, hf_lostcts, tvb, 0, 0, errors2);
proto_tree_add_boolean(sita_errors1_tree, hf_underrun, tvb, 0, 0, errors2);
}
}
/* try to find and run an applicable dissector */
if (!dissector_try_uint(sita_dissector_table, pinfo->pseudo_header->sita.sita_proto, tvb, pinfo, tree)) {
/* if one can't be found... tell them we don't know how to decode this protocol
and give them the details then */
col_set_str(pinfo->cinfo, COL_PROTOCOL, "UNKNOWN");
col_add_fstr(pinfo->cinfo, COL_INFO, "IOP protocol number: %u", pinfo->pseudo_header->sita.sita_proto);
call_dissector(data_handle, tvb, pinfo, tree); /* call the generic (hex display) decoder instead */
}
}
