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module vpp-classifier {
yang-version 1;
namespace "urn:opendaylight:params:xml:ns:yang:vpp:classifier";
prefix "vpp-classifier";
revision "2015-06-03" {
description
"Initial revision of model for VPP packet classifier.
The model can be used ony to implement ACLs.
Other classify table usages are not supported yet,
see https://jira.fd.io/browse/VPP-203 for details.";
reference
"https://wiki.fd.io/view/VPP/Introduction_To_N-tuple_Classifiers";
}
import ietf-yang-types {
prefix "yang";
}
typedef classify-table-ref {
type leafref {
path "/vpp-classifier:vpp-classifier/classify-table/name";
}
description
"This type is used by data models that need to reference
configured classify tables.";
}
typedef packet-handling-action {
type enumeration {
enum "deny" {
// by VPP convention, first neighbour node (at index 0) is a drop node
value 0;
}
enum "permit" {
value -1; // indicates that the next node not set
}
}
}
typedef vpp-node {
type union {
// FIXME: enable after VPP-203 is fixed
// type string; // name of vpp-node neighbour, TODO: base node also needs to be defined
type packet-handling-action;
}
description
"Defines VPP node reference using relative node name or packet handling action.";
}
typedef opaque-index {
type union {
type vpp-node;
type uint32;
}
description
"Defines opaque-index type - metadata that can be attached to session-hit packets.
Vpp nodes can't be referenced by index, because node indexes might change after vpp restart.";
}
grouping classify-session-attributes {
description
"Defines classify session attributes that are mapped to classify_add_del_session
and classify_session_details messages parameters.";
leaf hit_next_index {
type vpp-node;
mandatory true;
description
"Vpp node to which packet will be send when it produces a match.";
}
leaf opaque_index {
type opaque-index;
}
leaf advance {
type int32;
default 0;
description
"Nodes like ip4/6-classify use the parameter to \"consume\" networking layer.
Example: tunnel decapsulation.";
}
}
grouping classify-table-attributes {
description
"Defines classify table attributes that are mapped to classify_add_del_table
and classify_table_info_reply messages parameters.";
leaf nbuckets {
mandatory true;
type uint32;
description
"Used by classifier hashing algorithm. It is not possible to resize the bucket array,
therefore suggested value is approximate number of expected entries.";
}
leaf memory_size {
mandatory true;
type uint32;
description
"Memory size for classify table and its entries.";
}
leaf skip_n_vectors {
type uint32;
default 0;
description
"Number of 16 byte vectors to be skipped before applying mask.";
}
leaf next_table {
type classify-table-ref;
description
"Reference to the next classify table. Required when multiple table chaining is used.";
}
leaf miss_next_index {
mandatory true;
type vpp-node;
description
"Vpp node to which packet will be send when it falis to produce a match";
}
leaf mask {
type yang:hex-string;
mandatory true;
description
"Defines match mask (multiple of 16 bytes)";
}
leaf active_sessions {
type uint32;
mandatory true;
config false;
description
"Number of sessions defined for the classify table.";
}
list classify-session {
key "match";
leaf match {
type yang:hex-string;
description
"Defines actual value to be matched that is
a byte vector, which length is multiple of 16 bytes";
must "string-length(match) = string-length(../../mask)" {
error-message
"Match length is not equal to classify table mask length.";
description
"Match length must be equal to classify table mask length.";
}
}
uses classify-session-attributes;
}
}
container vpp-classifier {
list classify-table {
key "name";
leaf name {
type string;
description
"Hides classify table identifier managed by vpp.";
}
uses classify-table-attributes;
}
}
}
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