static int
dissect_ipmi_cmd(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
gint hf_parent_item, gint ett_tree, const ipmi_context_t * ctx)
{
ipmi_packet_data_t * data;
ipmi_netfn_t * cmd_list;
ipmi_cmd_t * cmd;
proto_item * ti;
proto_tree * cmd_tree = NULL, * tmp_tree;
guint8 prev_level, cc_val;
guint offset, siglen, is_resp;
const char * cc_str, * netfn_str;
/* get packet data */
data = get_packet_data(pinfo);
if (!data) {
return 0;
}
/* get prefix length */
siglen = ipmi_getsiglen(ctx->hdr.netfn);
/* get response flag */
is_resp = ctx->hdr.netfn & 1;
/* check message length */
if (tvb_captured_length(tvb) < ctx->hdr_len + siglen + is_resp
+ !(ctx->flags & IPMI_D_NO_CKS)) {
/* don bother with anything */
return call_data_dissector(tvb, pinfo, tree);
}
/* save nest level */
prev_level = data->curr_level;
/* assign next nest level */
data->curr_level = data->next_level;
/* increment next nest level */
data->next_level++;
/* check for the first invocation */
if (!data->curr_level) {
/* get current frame data */
data->curr_frame = get_frame_data(data, pinfo->num);
data->curr_frame_num = pinfo->num;
/* copy frame timestamp */
memcpy(&data->curr_frame->ts, &pinfo->abs_ts, sizeof(nstime_t));
/* cache channel and direction */
data->curr_channel = ctx->hdr.channel;
data->curr_dir = ctx->hdr.dir;
/* remove requests which are too old */
remove_old_requests(data, &pinfo->abs_ts);
}
if (data->curr_level < MAX_NEST_LEVEL) {
if (ctx->hdr.netfn & 1) {
/* perform request/response matching */
match_request_response(data, &ctx->hdr, ctx->flags);
} else {
/* add request to the list for later matching */
add_request(data, &ctx->hdr);
}
}
/* get command list by network function code */
cmd_list = ipmi_getnetfn(ctx->hdr.netfn,
tvb_get_ptr(tvb, ctx->hdr_len + is_resp, siglen));
/* get command descriptor */
cmd = ipmi_getcmd(cmd_list, ctx->hdr.cmd);
/* check if response */
if (is_resp) {
/* get completion code */
cc_val = tvb_get_guint8(tvb, ctx->hdr_len);
/* get completion code desc */
cc_str = ipmi_get_completion_code(cc_val, cmd);
} else {
cc_val = 0;
cc_str = NULL;
}
/* check if not inside a message */
if (!data->curr_level) {
/* add packet info */
add_command_info(pinfo, cmd, is_resp, cc_val, cc_str,
ctx->flags & IPMI_D_BROADCAST ? TRUE : FALSE);
}
if (tree) {
/* add parent node */
if (!data->curr_level) {
ti = proto_tree_add_item(tree, hf_parent_item, tvb, 0, -1, ENC_NA);
cmd_tree = proto_item_add_subtree(ti, ett_tree);
} else {
char str[ITEM_LABEL_LENGTH];
if (is_resp) {
g_snprintf(str, ITEM_LABEL_LENGTH, "Rsp, %s, %s",
cmd->desc, cc_str);
} else {
g_snprintf(str, ITEM_LABEL_LENGTH, "Req, %s", cmd->desc);
}
if (proto_registrar_get_ftype(hf_parent_item) == FT_STRING) {
ti = proto_tree_add_string(tree, hf_parent_item, tvb, 0, -1, str);
cmd_tree = proto_item_add_subtree(ti, ett_tree);
}
else
cmd_tree = proto_tree_add_subtree(tree, tvb, 0, -1, ett_tree, NULL, str);
}
if (data->curr_level < MAX_NEST_LEVEL) {
/* check if response */
if (ctx->hdr.netfn & 1) {
/* get current command data */
ipmi_cmd_data_t * rs_data =
data->curr_frame->cmd_data[data->curr_level];
if (rs_data->matched_frame_num) {
nstime_t ns;
/* add "Request to:" field */
ti = proto_tree_add_uint(cmd_tree, hf_ipmi_response_to,
tvb, 0, 0, rs_data->matched_frame_num);
/* mark field as a generated one */
PROTO_ITEM_SET_GENERATED(ti);
/* calculate delta time */
nstime_delta(&ns, &pinfo->abs_ts,
&get_frame_data(data,
rs_data->matched_frame_num)->ts);
/* add "Response time" field */
ti = proto_tree_add_time(cmd_tree, hf_ipmi_response_time,
tvb, 0, 0, &ns);
/* mark field as a generated one */
PROTO_ITEM_SET_GENERATED(ti);
}
} else {
/* get current command data */
ipmi_cmd_data_t * rq_data =
data->curr_frame->cmd_data[data->curr_level];
if (rq_data->matched_frame_num) {
/* add "Response in:" field */
ti = proto_tree_add_uint(cmd_tree, hf_ipmi_response_in,
tvb, 0, 0, rq_data->matched_frame_num);
/* mark field as a generated one */
PROTO_ITEM_SET_GENERATED(ti);
}
}
}
/* set starting offset */
offset = 0;
/* check if message is broadcast */
if (ctx->flags & IPMI_D_BROADCAST) {
/* skip first byte */
offset++;
}
/* check if session handle is specified */
if (ctx->flags & IPMI_D_SESSION_HANDLE) {
/* add session handle field */
proto_tree_add_item(cmd_tree, hf_ipmi_session_handle,
tvb, offset++, 1, ENC_LITTLE_ENDIAN);
}
/* check if responder address is specified */
if (ctx->flags & IPMI_D_TRG_SA) {
/* add response address field */
proto_tree_add_item(cmd_tree, hf_ipmi_header_trg, tvb,
offset++, 1, ENC_LITTLE_ENDIAN);
}
/* get NetFn string */
netfn_str = ipmi_getnetfnname(ctx->hdr.netfn, cmd_list);
/* Network function + target LUN */
tmp_tree = proto_tree_add_subtree_format(cmd_tree, tvb, offset, 1,
ett_header_byte_1, NULL, "Target LUN: 0x%02x, NetFN: %s %s (0x%02x)",
ctx->hdr.rs_lun, netfn_str,
is_resp ? "Response" : "Request", ctx->hdr.netfn);
/* add Net Fn */
proto_tree_add_uint_format(tmp_tree, hf_ipmi_header_netfn, tvb,
offset, 1, ctx->hdr.netfn << 2,
"NetFn: %s %s (0x%02x)", netfn_str,
is_resp ? "Response" : "Request", ctx->hdr.netfn);
proto_tree_add_item(tmp_tree, hf_ipmi_header_trg_lun, tvb,
offset++, 1, ENC_LITTLE_ENDIAN);
/* check if cks1 is specified */
if (!(ctx->flags & IPMI_D_NO_CKS)) {
guint8 cks = tvb_get_guint8(tvb, offset);
/* Header checksum */
if (ctx->cks1) {
guint8 correct = cks - ctx->cks1;
proto_tree_add_uint_format_value(cmd_tree, hf_ipmi_header_crc,
tvb, offset++, 1, cks,
"0x%02x (incorrect, expected 0x%02x)", cks, correct);
} else {
proto_tree_add_uint_format_value(cmd_tree, hf_ipmi_header_crc,
tvb, offset++, 1, cks,
"0x%02x (correct)", cks);
}
}
/* check if request address is specified */
if (!(ctx->flags & IPMI_D_NO_RQ_SA)) {
/* add request address field */
proto_tree_add_item(cmd_tree, hf_ipmi_header_src, tvb,
offset++, 1, ENC_LITTLE_ENDIAN);
}
/* check if request sequence is specified */
if (!(ctx->flags & IPMI_D_NO_SEQ)) {
/* Sequence number + source LUN */
tmp_tree = proto_tree_add_subtree_format(cmd_tree, tvb, offset, 1,
ett_header_byte_4, NULL, "%s: 0x%02x, SeqNo: 0x%02x",
(ctx->flags & IPMI_D_TMODE) ? "Bridged" : "Source LUN",
ctx->hdr.rq_lun, ctx->hdr.rq_seq);
if (ctx->flags & IPMI_D_TMODE) {
proto_tree_add_item(tmp_tree, hf_ipmi_header_bridged,
tvb, offset, 1, ENC_LITTLE_ENDIAN);
} else {
proto_tree_add_item(tmp_tree, hf_ipmi_header_src_lun,
tvb, offset, 1, ENC_LITTLE_ENDIAN);
}
/* print seq no */
proto_tree_add_item(tmp_tree, hf_ipmi_header_sequence, tvb,
offset++, 1, ENC_LITTLE_ENDIAN);
}
/* command code */
proto_tree_add_uint_format_value(cmd_tree, hf_ipmi_header_command,
tvb, offset++, 1, ctx->hdr.cmd, "%s (0x%02x)",
cmd->desc, ctx->hdr.cmd);
if (is_resp) {
/* completion code */
proto_tree_add_uint_format_value(cmd_tree,
hf_ipmi_header_completion, tvb, offset++, 1,
cc_val, "%s (0x%02x)", cc_str, cc_val);
}
if (siglen) {
/* command prefix (if present) */
ti = proto_tree_add_item(cmd_tree, hf_ipmi_header_sig, tvb,
offset, siglen, ENC_NA);
proto_item_append_text(ti, " (%s)", netfn_str);
}
}
if (tree || (cmd->flags & CMD_CALLRQ)) {
/* calculate message data length */
guint data_len = tvb_captured_length(tvb)
- ctx->hdr_len
- siglen
- (is_resp ? 1 : 0)
- !(ctx->flags & IPMI_D_NO_CKS);
/* create data subset */
tvbuff_t * data_tvb = tvb_new_subset_length(tvb,
ctx->hdr_len + siglen + (is_resp ? 1 : 0), data_len);
/* Select sub-handler */
ipmi_cmd_handler_t hnd = is_resp ? cmd->parse_resp : cmd->parse_req;
if (hnd && tvb_captured_length(data_tvb)) {
/* create data field */
tmp_tree = proto_tree_add_subtree(cmd_tree, data_tvb, 0, -1, ett_data, NULL, "Data");
/* save current command */
data->curr_hdr = &ctx->hdr;
/* save current completion code */
data->curr_ccode = cc_val;
/* call command parser */
hnd(data_tvb, pinfo, tmp_tree);
}
}
/* check if cks2 is specified */
if (tree && !(ctx->flags & IPMI_D_NO_CKS)) {
guint8 cks;
/* get cks2 offset */
offset = tvb_captured_length(tvb) - 1;
/* get cks2 */
cks = tvb_get_guint8(tvb, offset);
/* Header checksum */
if (ctx->cks2) {
guint8 correct = cks - ctx->cks2;
proto_tree_add_uint_format_value(cmd_tree, hf_ipmi_data_crc,
tvb, offset, 1, cks,
"0x%02x (incorrect, expected 0x%02x)", cks, correct);
} else {
proto_tree_add_uint_format_value(cmd_tree, hf_ipmi_data_crc,
tvb, offset, 1, cks,
"0x%02x (correct)", cks);
}
}
/* decrement next nest level */
data->next_level = data->curr_level;
/* restore previous nest level */
data->curr_level = prev_level;
return tvb_captured_length(tvb);
}
// Adapted from get_it_value in gtk/io_stat.c.
double get_io_graph_item(const io_graph_item_t *items_, io_graph_item_unit_t val_units_, int idx, int hf_index_, const capture_file *cap_file, int interval_, int cur_idx_)
{
double value = 0; /* FIXME: loss of precision, visible on the graph for small values */
int adv_type;
const io_graph_item_t *item;
guint32 interval;
item = &items_[idx];
// Basic units
switch (val_units_) {
case IOG_ITEM_UNIT_PACKETS:
return item->frames;
case IOG_ITEM_UNIT_BYTES:
return (double) item->bytes;
case IOG_ITEM_UNIT_BITS:
return (double) (item->bytes * 8);
case IOG_ITEM_UNIT_CALC_FRAMES:
return item->frames;
case IOG_ITEM_UNIT_CALC_FIELDS:
return (double) item->fields;
default:
/* If it's COUNT_TYPE_ADVANCED but not one of the
* generic ones we'll get it when we switch on the
* adv_type below. */
break;
}
if (hf_index_ < 0) {
return 0;
}
// Advanced units
adv_type = proto_registrar_get_ftype(hf_index_);
switch (adv_type) {
case FT_UINT8:
case FT_UINT16:
case FT_UINT24:
case FT_UINT32:
case FT_UINT64:
case FT_INT8:
case FT_INT16:
case FT_INT24:
case FT_INT32:
case FT_INT64:
switch (val_units_) {
case IOG_ITEM_UNIT_CALC_SUM:
value = (double) item->int_tot;
break;
case IOG_ITEM_UNIT_CALC_MAX:
value = (double) item->int_max;
break;
case IOG_ITEM_UNIT_CALC_MIN:
value = (double) item->int_min;
break;
case IOG_ITEM_UNIT_CALC_AVERAGE:
if (item->fields) {
value = (double)item->int_tot / item->fields;
} else {
value = 0;
}
break;
default:
break;
}
break;
case FT_FLOAT:
switch (val_units_) {
case IOG_ITEM_UNIT_CALC_SUM:
value = item->float_tot;
break;
case IOG_ITEM_UNIT_CALC_MAX:
value = item->float_max;
break;
case IOG_ITEM_UNIT_CALC_MIN:
value = item->float_min;
break;
case IOG_ITEM_UNIT_CALC_AVERAGE:
if (item->fields) {
value = (double)item->float_tot / item->fields;
} else {
value = 0;
}
break;
default:
break;
}
break;
case FT_DOUBLE:
switch (val_units_) {
case IOG_ITEM_UNIT_CALC_SUM:
value = item->double_tot;
break;
case IOG_ITEM_UNIT_CALC_MAX:
value = item->double_max;
break;
case IOG_ITEM_UNIT_CALC_MIN:
value = item->double_min;
break;
case IOG_ITEM_UNIT_CALC_AVERAGE:
if (item->fields) {
value = item->double_tot / item->fields;
} else {
value = 0;
}
break;
default:
break;
}
break;
case FT_RELATIVE_TIME:
switch (val_units_) {
case IOG_ITEM_UNIT_CALC_MAX:
value = nstime_to_sec(&item->time_max);
break;
case IOG_ITEM_UNIT_CALC_MIN:
value = nstime_to_sec(&item->time_min);
break;
case IOG_ITEM_UNIT_CALC_SUM:
value = nstime_to_sec(&item->time_tot);
break;
case IOG_ITEM_UNIT_CALC_AVERAGE:
if (item->fields) {
value = nstime_to_sec(&item->time_tot) / item->fields;
} else {
value = 0;
}
break;
case IOG_ITEM_UNIT_CALC_LOAD:
// "LOAD graphs plot the QUEUE-depth of the connection over time"
// (for response time fields such as smb.time, rpc.time, etc.)
// This interval is expressed in milliseconds.
if (idx == cur_idx_ && cap_file) {
interval = (guint32)(nstime_to_msec(&cap_file->elapsed_time) + 0.5);
interval -= (interval_ * idx);
} else {
interval = interval_;
}
value = nstime_to_msec(&item->time_tot) / interval;
break;
default:
break;
}
break;
default:
break;
}
return value;
}
