/*
Zebra Protocol header version 0:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-------------------------------+---------------+
| Length (2) | Command (1) |
+-------------------------------+---------------+
Zebra Protocol header version 1:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-------------------------------+---------------+-------------+
| Length (2) | Marker (1) | Version (1) |
+-------------------------------+---------------+-------------+
| Command (2) |
+-------------------------------+
The Marker is 0xFF to distinguish it from a version 0 header.
*/
static void
dissect_zebra(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_item *ti;
proto_tree *zebra_tree;
gboolean request;
int left, offset;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "ZEBRA");
request = (pinfo->destport == pinfo->match_uint);
left = tvb_reported_length(tvb);
offset = 0;
col_set_str(pinfo->cinfo, COL_INFO,
request? "Zebra Request" : "Zebra Reply");
/* if (tree) */ {
ti = proto_tree_add_item(tree, proto_zebra, tvb, offset, -1,
ENC_NA);
zebra_tree = proto_item_add_subtree(ti, ett_zebra);
ti = proto_tree_add_boolean(zebra_tree, hf_zebra_request,
tvb, offset, 0, request);
PROTO_ITEM_SET_HIDDEN(ti);
for (;;) {
guint8 headermarker, version;
guint16 command, len;
proto_tree *zebra_request_tree;
if (left < 3)
break;
len = tvb_get_ntohs(tvb, offset);
if (len < 3)
break;
headermarker = tvb_get_guint8(tvb,offset+2);
if (headermarker != 0xFF) {
command = headermarker;
version = 0;
} else {
version = tvb_get_guint8(tvb, offset+3);
command = tvb_get_ntohs(tvb, offset+4);
}
col_append_fstr(pinfo->cinfo, COL_INFO, ": %s",
val_to_str(command, messages, "Command Type 0x%02d"));
ti = proto_tree_add_uint(zebra_tree,
hf_zebra_command, tvb,
offset, len, command);
zebra_request_tree = proto_item_add_subtree(ti,
ett_zebra_request);
dissect_zebra_request(zebra_request_tree, request, tvb,
offset, len, command, version);
offset += len;
left -= len;
}
}
}
static void
dissect_zebra(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_item *ti;
proto_tree *zebra_tree;
gboolean request;
int left, offset;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "ZEBRA");
request = (pinfo->destport == pinfo->match_uint);
left = tvb_reported_length(tvb);
offset = 0;
if (check_col(pinfo->cinfo, COL_INFO)) {
col_set_str(pinfo->cinfo, COL_INFO,
request? "ZEBRA Request" : "ZEBRA Reply");
}
if (tree) {
ti = proto_tree_add_item(tree, proto_zebra, tvb, offset, -1,
ENC_NA);
zebra_tree = proto_item_add_subtree(ti, ett_zebra);
ti = proto_tree_add_boolean(zebra_tree, hf_zebra_request,
tvb, offset, 0, request);
PROTO_ITEM_SET_HIDDEN(ti);
for (;;) {
guint8 command;
guint16 len;
proto_tree *zebra_request_tree;
if (left < 3) break;
len = tvb_get_ntohs(tvb, offset);
if (len < 3) break;
command = tvb_get_guint8(tvb, offset+2);
ti = proto_tree_add_uint(zebra_tree,
hf_zebra_command, tvb, offset, len,
command);
zebra_request_tree = proto_item_add_subtree(ti,
ett_zebra_request);
dissect_zebra_request(zebra_request_tree, request, tvb,
offset, len, command);
offset += len;
left -= len;
}
}
}
