/* code to dissect NORM cmd(cc) packets */
static guint dissect_norm_cmd_cc(proto_tree *tree, packet_info *pinfo,
tvbuff_t *tvb, guint offset, guint8 hlen)
{
proto_tree_add_item(tree, hf_reserved, tvb, offset, 1, ENC_NA); offset += 1;
proto_tree_add_item(tree, hf_cc_sequence, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2;
proto_tree_add_item(tree, hf_cc_sts, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4;
proto_tree_add_item(tree, hf_cc_stus, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4;
if (offset < hdrlen2bytes(hlen)) {
offset = dissect_norm_hdrext(tree, pinfo, tvb, offset, hlen);
}
while (offset < hdrlen2bytes(hlen)) {
proto_item *ti, *tif;
proto_tree *cc_tree, *flag_tree;
double grtt;
ti = proto_tree_add_text(tree, tvb, offset, 8, "Congestion Control");
cc_tree = proto_item_add_subtree(ti, ett_congestioncontrol);
proto_tree_add_item(cc_tree, hf_cc_node_id, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4;
tif = proto_tree_add_item(cc_tree, hf_cc_flags, tvb, offset, 1, ENC_BIG_ENDIAN);
flag_tree = proto_item_add_subtree(tif, ett_flags);
proto_tree_add_item(flag_tree, hf_cc_flags_clr, tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(flag_tree, hf_cc_flags_plr, tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(flag_tree, hf_cc_flags_rtt, tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(flag_tree, hf_cc_flags_start, tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(flag_tree, hf_cc_flags_leave, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
grtt = UnquantizeRtt(tvb_get_guint8(tvb, offset));
proto_tree_add_double(cc_tree, hf_cc_rtt, tvb, offset, 1, grtt); offset += 1;
grtt = rmt_decode_send_rate(tvb_get_ntohs(tvb, offset));
proto_tree_add_double(cc_tree, hf_cc_rate, tvb, offset, 2, grtt); offset += 2;
}
return offset;
}
/* code to dissect fairly common sequence in NORM packets */
static guint dissect_grrtetc(proto_tree *tree, tvbuff_t *tvb, guint offset)
{
guint8 backoff;
double gsizex;
double grtt;
proto_tree_add_item(tree, hf.instance_id, tvb, offset, 2, ENC_BIG_ENDIAN); offset+=2;
grtt = UnquantizeRtt(tvb_get_guint8(tvb, offset));
proto_tree_add_double(tree, hf.grtt, tvb, offset, 1, grtt); offset++;
backoff = hi_nibble(tvb_get_guint8(tvb, offset));
gsizex = UnquantizeGSize((guint8)lo_nibble(tvb_get_guint8(tvb, offset)));
proto_tree_add_uint(tree, hf.backoff, tvb, offset, 1, backoff);
proto_tree_add_double(tree, hf.gsize, tvb, offset, 1, gsizex);
offset++;
return offset;
}