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O-RAN FH CUS: add some comments around u-plane dissection

This commit is contained in:
Martin Mathieson 2021-12-14 10:54:26 +00:00
parent 4e92b7c762
commit b76a2b7a23
1 changed files with 9 additions and 2 deletions
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11
epan/dissectors/packet-oran.c
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@ -1461,11 +1461,14 @@ dissect_oran_u(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _
proto_item_append_text(protocol_item, "-U");
proto_tree *oran_tree = proto_item_add_subtree(protocol_item, ett_oran);
/* Transport header */
/* Real-time control data / IQ data transfer message series identifier */
addPcOrRtcid(tvb, oran_tree, &offset, "ecpriPcid");
/* Message identifier */
addSeqid(tvb, oran_tree, &offset);
/* Common header for time reference */
proto_item *timingHeader;
proto_tree *timing_header_tree = proto_tree_add_subtree(oran_tree, tvb, offset, 4, ett_oran_u_timing, &timingHeader, "Timing header");
guint32 direction;
@ -1529,6 +1532,8 @@ dissect_oran_u(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _
proto_item *sectionHeading;
proto_tree *section_tree = proto_tree_add_subtree(oran_tree, tvb, offset, 2, ett_oran_u_section, &sectionHeading, "Section");
/* Section Header fields */
/* sectionId */
guint32 sectionId = 0;
proto_tree_add_item_ret_uint(section_tree, hf_oran_section_id, tvb, offset, 2, ENC_BIG_ENDIAN, &sectionId);
@ -1558,8 +1563,9 @@ dissect_oran_u(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _
write_section_info(sectionHeading, pinfo, protocol_item, sectionId, startPrbu, numPrbu);
/* TODO: should this use the same pref as c-plane? */
if (numPrbu == 0) {
/* Special case for all PRBs */
/* Special case for all PRBs (NR: the total number of PRBs may be > 255) */
numPrbu = pref_data_plane_section_total_rbs;
startPrbu = 0; /* may already be 0... */
}
@ -1587,6 +1593,7 @@ dissect_oran_u(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _
number_of_sections++;
} while (bytesLeft >= (4 + nBytesPerPrb)); /* FIXME: bad heuristic */
/* Show number of sections found */
proto_item *ti = proto_tree_add_uint(oran_tree, hf_oran_numberOfSections, tvb, 0, 0, number_of_sections);
proto_item_set_generated(ti);