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-rw-r--r--nat/nat-api/src/main/yang/ietf-nat.yang1074
-rw-r--r--nat/nat-api/src/main/yang/interface-nat.yang44
-rw-r--r--nat/nat-api/src/main/yang/nat-context.yang64
3 files changed, 1182 insertions, 0 deletions
diff --git a/nat/nat-api/src/main/yang/ietf-nat.yang b/nat/nat-api/src/main/yang/ietf-nat.yang
new file mode 100644
index 000000000..54707708c
--- /dev/null
+++ b/nat/nat-api/src/main/yang/ietf-nat.yang
@@ -0,0 +1,1074 @@
+module ietf-nat {
+
+ namespace "urn:ietf:params:xml:ns:yang:ietf-nat";
+ //namespace to be assigned by IANA
+ prefix "nat";
+ import ietf-inet-types {
+ prefix "inet";
+ }
+
+ organization "IETF NetMod Working Group";
+ contact
+ "Senthil Sivakumar <ssenthil@cisco.com>
+ Mohamed Boucadair <mohamed.boucadair@orange.com>
+ Suresh Vinapamula <sureshk@juniper.net>";
+
+ description
+ "This module is a YANG module for NAT implementations
+ (including both NAT44 and NAT64 flavors.
+
+ Copyright (c) 2015 IETF Trust and the persons identified as
+ authors of the code. All rights reserved.
+
+ Redistribution and use in source and binary forms, with or
+ without modification, is permitted pursuant to, and subject
+ to the license terms contained in, the Simplified BSD License
+ set forth in Section 4.c of the IETF Trust's Legal Provisions
+ Relating to IETF Documents
+ (http://trustee.ietf.org/license-info).
+
+ This version of this YANG module is part of RFC XXXX; see
+ the RFC itself for full legal notices.";
+
+ revision 2015-09-08 {
+ description "Fixes few YANG errors.";
+ reference "-02";
+ }
+
+ revision 2015-09-07 {
+ description "Completes the NAT64 model.";
+ reference "01";
+ }
+
+ revision 2015-08-29 {
+ description "Initial version.";
+ reference "00";
+ }
+
+ typedef percent {
+ type uint8 {
+ range "0 .. 100";
+ }
+ description
+ "Percentage";
+ }
+
+ /*
+ * Grouping
+ */
+
+ grouping timeouts {
+ description
+ "Configure values of various timeouts.";
+
+ leaf udp-timeouts {
+ type uint32;
+ default 300;
+ description
+ "UDP inactivity timeout.";
+ }
+
+ leaf tcp-idle-timeout {
+ type uint32;
+ default 7440;
+ description
+ "TCP Idle timeout, as per RFC 5382 should be no
+ 2 hours and 4 minutes.";
+ }
+
+ leaf tcp-trans-open-timeout {
+ type uint32;
+ default 240;
+ description
+ "The value of the transitory open connection
+ idle-timeout.";
+ }
+
+ leaf tcp-trans-close-timeout {
+ type uint32;
+ default 240;
+ description
+ "The value of the transitory close connection
+ idle-timeout.";
+ }
+
+ leaf tcp-in-syn-timeout {
+ type uint32;
+ default 6;
+ description
+ "6 seconds, as defined in [RFC5382].";
+ }
+
+ leaf fragment-min-timeout {
+ type uint32;
+ default 2;
+ description
+ "As long as the NAT has available resources,
+ the NAT allows the fragments to arrive
+ over fragment-min-timeout interval.
+ The default value is inspired from RFC6146.";
+ }
+
+ leaf icmp-timeout {
+ type uint32;
+ default 60;
+ description
+ "60 seconds, as defined in [RFC5508].";
+ }
+ }
+
+ // port numbers: single or port range
+
+ grouping port-number {
+ description
+ "Individual port or a range of ports.";
+
+ choice port-type {
+ default single-port-number;
+ description
+ "Port type: single or port-range.";
+
+ case single-port-number {
+ leaf single-port-number {
+ type inet:port-number;
+ description
+ "Used for single port numbers.";
+ }
+ }
+
+ case port-range {
+ leaf start-port-number {
+ type inet:port-number;
+ description
+ "Begining of the port range.";
+ }
+
+ leaf end-port-number {
+ type inet:port-number;
+ description
+ "End of the port range.";
+ }
+ }
+ }
+ }
+
+ grouping mapping-entry {
+ description
+ "NAT mapping entry.";
+
+ leaf index {
+ type uint32;
+ description
+ "A unique identifier of a mapping entry.";
+ }
+
+ leaf type {
+ type enumeration {
+ enum "static" {
+ description
+ "The mapping entry is manually configured.";
+ }
+
+ enum "dynamic" {
+ description
+ "This mapping is created by an outgoing
+ packet.";
+ }
+ }
+ description
+ "Indicates the type of a mapping entry. E.g.,
+ a mapping can be: static or dynamic";
+ }
+
+ leaf internal-src-address {
+ type inet:ip-address;
+ mandatory true;
+ description
+ "Corresponds to the source IPv4/IPv6 address
+ of the IPv4 packet";
+ }
+
+ container internal-src-port {
+ description
+ "Corresponds to the source port of the
+ IPv4 packet.";
+ uses port-number;
+ }
+
+ leaf external-src-address {
+ type inet:ipv4-address;
+ mandatory true;
+ description
+ "External IPv4 address assigned by NAT";
+ }
+
+ container external-src-port {
+ description
+ "External source port number assigned by NAT.";
+ uses port-number;
+ }
+
+ leaf transport-protocol {
+ type uint8;
+ // mandatory true;
+ description
+ "Upper-layer protocol associated with this mapping.
+ Values are taken from the IANA protocol registry.
+ For example, this field contains 6 (TCP) for a TCP
+ mapping or 17 (UDP) for a UDP mapping.";
+ }
+
+ leaf internal-dst-address {
+ type inet:ipv4-prefix;
+ description
+ "Corresponds to the destination IPv4 address
+ of the IPv4 packet, for example, some NAT
+ implementation support translating both source
+ and destination address and ports referred to as
+ Twice NAT";
+ }
+
+ container internal-dst-port {
+ description
+ "Corresponds to the destination port of the
+ IPv4 packet.";
+ uses port-number;
+ }
+
+ leaf external-dst-address {
+ type inet:ipv4-address;
+ description
+ "External destination IPv4 address";
+ }
+
+ container external-dst-port {
+ description
+ "External source port number.";
+ uses port-number;
+ }
+
+ leaf lifetime {
+ type uint32;
+ // mandatory true;
+ description
+ "Lifetime of the mapping.";
+ }
+ }
+
+ grouping nat-parameters {
+ description
+ "NAT parameters for a given instance";
+
+ list external-ip-address-pool {
+ key pool-id;
+
+
+ description
+ "Pool of external IP addresses used to service
+ internal hosts.
+ Both contiguous and non-contiguous pools
+ can be configured for NAT.";
+
+ leaf pool-id {
+ type uint32;
+ description
+ "An identifier of the address pool.";
+ }
+
+ leaf external-ip-pool {
+ type inet:ipv4-prefix;
+ description
+ "An IPv4 prefix used for NAT purposes.";
+ }
+ }
+
+
+ leaf subscriber-mask-v6 {
+ type uint8 {
+ range "0 .. 128";
+ }
+ description
+ "The subscriber-mask is an integer that indicates
+ the length of significant bits to be applied on
+ the source IP address (internal side) to
+ unambiguously identify a CPE.
+
+ Subscriber-mask is a system-wide configuration
+ parameter that is used to enforce generic
+ per-subscriberpolicies (e.g., port-quota).
+
+ The enforcement of these generic policies does not
+ require the configuration of every subscriber's
+ prefix.
+
+ Example: suppose the 2001:db8:100:100::/56 prefix
+ is assigned to a NAT64 serviced CPE. Suppose also
+ that 2001:db8:100:100::1 is the IPv6 address used
+ by the client that resides in that CPE. When the
+ NAT64 receives a packet from this client,
+ it applies the subscriber-mask (e.g., 56) on
+ the source IPv6 address to compute the associated
+ prefix for this client (2001:db8:100:100::/56).
+ Then, the NAT64 enforces policies based on that
+ prefix (2001:db8:100:100::/56), not on the exact
+ source IPv6 address.";
+ }
+
+
+ list subscriber-mask-v4 {
+
+ key sub-mask-id;
+
+ description
+ "IPv4 subscriber mask.";
+
+ leaf sub-mask-id {
+ type uint32;
+ description
+ "An identifier of the subscriber masks.";
+ }
+ leaf sub-mask {
+ type inet:ipv4-prefix;
+ // mandatory true;
+ description
+ "The IP address subnets that matches
+ should be translated. E.g., If the
+ private realms that are to be translated
+ by NAT would be 192.0.2.0/24";
+ }
+ }
+
+ leaf paired-address-pooling {
+ type boolean;
+ default true;
+ description
+ "Paired address pooling is indicating to NAT
+ that all the flows from an internal IP
+ address must be assigned the same external
+ address. This is defined in RFC 4007.";
+ }
+
+ leaf nat-mapping-type {
+ type enumeration {
+ enum "eim" {
+ description
+ "endpoint-independent-mapping.
+ Refer section 4 of RFC 4787.";
+ }
+
+ enum "adm" {
+ description
+ "address-dependent-mapping.
+ Refer section 4 of RFC 4787.";
+ }
+
+ enum "edm" {
+ description
+ "address-and-port-dependent-mapping.
+ Refer section 4 of RFC 4787.";
+ }
+ }
+ description
+ "Indicates the type of a NAT mapping.";
+ }
+ leaf nat-filtering-type {
+ type enumeration {
+ enum "eif" {
+ description
+ "endpoint-independent- filtering.
+ Refer section 5 of RFC 4787.";
+ }
+
+ enum "adf" {
+ description
+ "address-dependent- filtering.
+ Refer section 5 of RFC 4787.";
+ }
+
+ enum "edf" {
+ description
+ "address-and-port-dependent- filtering.
+ Refer section 5 of RFC 4787.";
+ }
+ }
+ description
+ "Indicates the type of a NAT filtering.";
+ }
+
+ leaf port-quota {
+ type uint16;
+ description
+ "Configures a port quota to be assigned per
+ subscriber.";
+ }
+
+ container port-set {
+ description
+ "Manages port-set assignments.";
+
+ leaf port-set-enable {
+ type boolean;
+ description
+ "Enable/Disable port set assignment.";
+ }
+
+ leaf port-set-size {
+ type uint16;
+ description
+ "Indicates the size of assigned port
+ sets.";
+ }
+
+ leaf port-set-timeout {
+ type uint32;
+ description
+ "Inactivty timeout for port sets.";
+ }
+ }
+
+ leaf port-randomization-enable {
+ type boolean;
+ description
+ "Enable/disable port randomization
+ feature.";
+ }
+
+ leaf port-preservation-enable {
+ type boolean;
+ description
+ "Indicates whether the PCP server should
+ preserve the internal port number.";
+ }
+
+ leaf port-range-preservation-enable {
+ type boolean;
+ description
+ "Indicates whether the NAT device should
+ preserve the internal port range.";
+ }
+
+ leaf port-parity-preservation-enable {
+ type boolean;
+ description
+ "Indicates whether the PCP server should
+ preserve the port parity of the
+ internal port number.";
+ }
+ leaf address-roundrobin-enable {
+ type boolean;
+ description
+ "Enable/disable address allocation
+ round robin.";
+ }
+
+ uses timeouts;
+ container logging-info {
+ description
+ "Information about Logging NAT events";
+
+ leaf destination-address {
+ type inet:ipv4-prefix;
+ // mandatory true;
+ description
+ "Address of the collector that receives
+ the logs";
+ }
+ leaf destination-port {
+ type inet:port-number;
+ // mandatory true;
+ description
+ "Destination port of the collector.";
+ }
+
+ }
+ container connection-limit {
+ description
+ "Information on the config parameters that
+ rate limit the translations based on various
+ criteria";
+
+ leaf limit-per-subscriber {
+ type uint32;
+ description
+ "Maximum number of NAT mappings per
+ subscriber.";
+ }
+ leaf limit-per-vrf {
+ type uint32;
+ description
+ "Maximum number of NAT mappings per
+ VLAN/VRF.";
+ }
+ leaf limit-per-subnet {
+ type inet:ipv4-prefix;
+ description
+ "Maximum number of NAT mappings per
+ subnet.";
+ }
+ leaf limit-per-instance {
+ type uint32;
+ // mandatory true;
+ description
+ "Maximum number of NAT mappings per
+ instance.";
+ }
+ }
+ container mapping-limit {
+ description
+ "Information on the config parameters that
+ rate limit the mappings based on various
+ criteria";
+
+ leaf limit-per-subscriber {
+ type uint32;
+ description
+ "Maximum number of NAT mappings per
+ subscriber.";
+ }
+ leaf limit-per-vrf {
+ type uint32;
+ description
+ "Maximum number of NAT mappings per
+ VLAN/VRF.";
+ }
+ leaf limit-per-subnet {
+ type inet:ipv4-prefix;
+ description
+ "Maximum number of NAT mappings per
+ subnet.";
+ }
+ leaf limit-per-instance {
+ type uint32;
+ // mandatory true;
+ description
+ "Maximum number of NAT mappings per
+ instance.";
+ }
+ }
+ leaf ftp-alg-enable {
+ type boolean;
+ description
+ "Enable/Disable FTP ALG";
+ }
+
+ leaf dns-alg-enable {
+ type boolean;
+ description
+ "Enable/Disable DNSALG";
+ }
+
+ leaf tftp-alg-enable {
+ type boolean;
+ description
+ "Enable/Disable TFTP ALG";
+ }
+
+ leaf msrpc-alg-enable {
+ type boolean;
+ description
+ "Enable/Disable MS-RPC ALG";
+ }
+
+ leaf netbios-alg-enable {
+ type boolean;
+ description
+ "Enable/Disable NetBIOS ALG";
+ }
+
+ leaf rcmd-alg-enable {
+ type boolean;
+ description
+ "Enable/Disable rcmd ALG";
+ }
+
+ leaf ldap-alg-enable {
+ type boolean;
+ description
+ "Enable/Disable LDAP ALG";
+ }
+
+ leaf sip-alg-enable {
+ type boolean;
+ description
+ "Enable/Disable SIP ALG";
+ }
+
+ leaf rtsp-alg-enable {
+ type boolean;
+ description
+ "Enable/Disable RTSP ALG";
+ }
+
+ leaf h323-alg-enable {
+ type boolean;
+ description
+ "Enable/Disable H323 ALG";
+ }
+
+ leaf all-algs-enable {
+ type boolean;
+ description
+ "Enable/Disable all the ALGs";
+ }
+
+ container notify-pool-usage {
+ description
+ "Notification of Pool usage when certain criteria
+ is met";
+
+ leaf pool-id {
+ type uint32;
+ description
+ "Pool-ID for which the notification
+ criteria is defined";
+ }
+
+ leaf notify-pool-hi-threshold {
+ type percent;
+ // mandatory true;
+ description
+ "Notification must be generated when the
+ defined high threshold is reached.
+ For example, if a notification is
+ required when the pool utilization reaches
+ 90%, this configuration parameter must
+ be set to 90%";
+ }
+
+ leaf notify-pool-low-threshold {
+ type percent;
+ description
+ "Notification must be generated when the defined
+ low threshold is reached.
+ For example, if a notification is required when
+ the pool utilization reaches below 10%,
+ this configuration parameter must be set to
+ 10%";
+ }
+ }
+ list nat64-prefixes {
+ key nat64-prefix-id;
+
+ description
+ "Provides one or a list of NAT64 prefixes
+ With or without a list of destination IPv4 prefixes.
+
+ Destination-based Pref64::/n is discussed in
+ Section 5.1 of [RFC7050]). For example:
+ 192.0.2.0/24 is mapped to 2001:db8:122:300::/56.
+ 198.51.100.0/24 is mapped to 2001:db8:122::/48.";
+
+ leaf nat64-prefix-id {
+ type uint32;
+ description
+ "An identifier of the NAT64 prefix.";
+ }
+
+ leaf nat64-prefix {
+ type inet:ipv6-prefix;
+ default "64:ff9b::/96";
+ description
+ "A NAT64 prefix. Can be NSP or WKP [RFC6052].";
+ }
+
+ list destination-ipv4-prefix {
+
+ key ipv4-prefix-id;
+
+ description
+ "An IPv4 prefix/address.";
+
+ leaf ipv4-prefix-id {
+ type uint32;
+ description
+ "An identifier of the IPv4 prefix/address.";
+ }
+
+ leaf ipv4-prefix {
+ type inet:ipv4-prefix;
+ description
+ "An IPv4 address/prefix. ";
+ }
+ }
+ }
+ } //nat-parameters group
+
+ container nat-config {
+ description
+ "NAT";
+
+ container nat-instances {
+ description
+ "nat instances";
+
+ list nat-instance {
+
+ key "id";
+
+ description
+ "A NAT instance.";
+
+ leaf id {
+ type uint32;
+ description
+ "NAT instance identifier.";
+ }
+
+ leaf enable {
+ type boolean;
+ description
+ "Status of the the NAT instance.";
+ }
+
+ uses nat-parameters;
+
+ container mapping-table {
+ description
+ "NAT dynamic mapping table used to track
+ sessions";
+
+ list mapping-entry {
+ key "index";
+ description
+ "NAT mapping entry.";
+ uses mapping-entry;
+ }
+ }
+ }
+ }
+ }
+
+ /*
+ * NAT State
+ */
+
+ container nat-state {
+
+ config false;
+
+ description
+ "nat-state";
+
+ container nat-instances {
+ description
+ "nat instances";
+
+ list nat-instance {
+ key "id";
+
+ description
+ "nat instance";
+
+ leaf id {
+ // FIXME changed int32 to uint32 to align with nat-config (authors of draft notified)
+ type uint32;
+ description
+ "The identifier of the nat instance.";
+ }
+
+ container nat-capabilities {
+ description
+ "NAT Capabilities";
+
+ leaf nat44-support {
+ type boolean;
+ description
+ "Indicates NAT44 support";
+ }
+
+ leaf nat64-support {
+ type boolean;
+ description
+ "Indicates NAT64 support";
+ }
+
+ leaf static-mapping-support {
+ type boolean;
+ description
+ "Indicates whether static mappings are
+ supported.";
+ }
+
+ leaf port-set-support {
+ type boolean;
+ description
+ "Indicates port set assignment
+ support ";
+ }
+
+ leaf port-randomization-support {
+ type boolean;
+ description
+ "Indicates whether port randomization is
+ supported.";
+ }
+
+ leaf port-range-preservation-support {
+ type boolean;
+ description
+ "Indicates whether port range
+ preservation is supported.";
+ }
+
+ leaf port-preservation-suport {
+ type boolean;
+ description
+ "Indicates whether port preservation
+ is supported.";
+ }
+
+ leaf port-parity-preservation-support {
+ type boolean;
+ description
+ "Indicates whether port parity
+ preservation is supported.";
+ }
+
+ leaf address-roundrobin-support {
+ type boolean;
+ description
+ "Indicates whether address allocation
+ round robin is supported.";
+ }
+
+ leaf ftp-alg-support {
+ type boolean;
+ description
+ "Indicates whether FTP ALG is supported";
+ }
+
+ leaf dns-alg-support {
+ type boolean;
+ description
+ "Indicates whether DNSALG is supported";
+ }
+
+ leaf tftp-support {
+ type boolean;
+ description
+ "Indicates whether TFTP ALG is supported";
+ }
+
+ leaf msrpc-alg-support {
+ type boolean;
+ description
+ "Indicates whether MS-RPC ALG is supported";
+ }
+
+ leaf netbios-alg-support {
+ type boolean;
+ description
+ "Indicates whether NetBIOS ALG is supported";
+ }
+
+ leaf rcmd-alg-support {
+ type boolean;
+ description
+ "Indicates whether rcmd ALG is supported";
+ }
+
+ leaf ldap-alg-support {
+ type boolean;
+ description
+ "Indicates whether LDAP ALG is supported";
+ }
+
+ leaf sip-alg-support {
+ type boolean;
+ description
+ "Indicates whether SIP ALG is supported";
+ }
+
+ leaf rtsp-alg-support {
+ type boolean;
+ description
+ "Indicates whether RTSP ALG is supported";
+ }
+
+ leaf h323-alg-support {
+ type boolean;
+ description
+ "Indicates whether H323 ALG is supported";
+ }
+
+ leaf paired-address-pooling-support {
+ type boolean;
+ description
+ "Indicates whether paired-address-pooling is
+ supported";
+ }
+
+ leaf endpoint-independent-mapping-support {
+ type boolean;
+ description
+ "Indicates whether endpoint-independent-mapping
+ in Section 4 of RFC 4787 is supported.";
+ }
+
+ leaf address-dependent-mapping-support {
+ type boolean;
+ description
+ "Indicates whether endpoint-independent-mapping
+ in Section 4 of RFC 4787 is supported.";
+ }
+
+ leaf address-and-port-dependent-mapping-support {
+ type boolean;
+ description
+ "Indicates whether endpoint-independent-mapping in
+ section 4 of RFC 4787 is supported.";
+ }
+
+ leaf endpoint-independent-filtering-support {
+ type boolean;
+ description
+ "Indicates whether endpoint-independent-mapping in
+ section 5 of RFC 4787 is supported.";
+ }
+
+ leaf address-dependent-filtering {
+ type boolean;
+ description
+ "Indicates whether endpoint-independent-mapping in
+ section 5 of RFC 4787 is supported.";
+ }
+
+ leaf address-and-port-dependent-filtering {
+ type boolean;
+ description
+ "Indicates whether endpoint-independent-mapping in
+ section 5 of RFC 4787 is supported.";
+ }
+
+ leaf stealth-mode-support {
+ type boolean;
+ description
+ "Indicates whether to respond for unsolicited
+ traffic.";
+ }
+
+ }
+
+ container nat-current-config {
+ description
+ "current config";
+
+ uses nat-parameters;
+ }
+
+ container mapping-table {
+ description
+ "Mapping table";
+ list mapping-entry {
+ key "index";
+ description
+ "mapping entry";
+ uses mapping-entry;
+ }
+ }
+
+ container statistics {
+ description
+ "Statistics related to the NAT instance";
+
+ leaf total-mappings {
+ type uint32;
+ description
+ "Total number of NAT Mappings present
+ at the time. This includes all the
+ static and dynamic mappings";
+ }
+ leaf total-tcp-mappings {
+ type uint32;
+ description
+ "Total number of TCP Mappings present
+ at the time.";
+ }
+ leaf total-udp-mappings {
+ type uint32;
+ description
+ "Total number of UDP Mappings present
+ at the time.";
+ }
+ leaf total-icmp-mappings {
+ type uint32;
+ description
+ "Total number of ICMP Mappings present
+ at the time.";
+ }
+ container pool-stats {
+ description
+ "Statistics related to Pool usage";
+ leaf pool-id {
+ type uint32;
+ description
+ "Unique Identifier that represents
+ a pool";
+ }
+ leaf address-allocated {
+ type uint32;
+ description
+ "Number of allocated addresses in
+ the pool";
+ }
+ leaf address-free {
+ type uint32;
+ description
+ "Number of free addresses in
+ the pool.The sum of free
+ addresses and allocated
+ addresses are the total
+ addresses in the pool";
+ }
+ container port-stats {
+ description
+ "Statistics related to port
+ usage.";
+
+ leaf ports-allocated {
+ type uint32;
+ description
+ "Number of allocated ports
+ in the pool";
+ }
+
+ leaf ports-free {
+ type uint32;
+ description
+ "Number of free addresses
+ in the pool";
+ }
+ }
+ }
+ } //statistics
+ } //nat-instance
+ } //nat-instances
+ } //nat-state
+ /*
+ * Notifications
+ */
+ notification nat-event {
+ description
+ "Notifications must be generated when the defined
+ high/low threshold is reached. Related configuration
+ parameters must be provided to trigger
+ the notifications.";
+
+ leaf id {
+ type leafref {
+ path
+ "/nat-state/nat-instances/"
+ + "nat-instance/id";
+ }
+ description
+ "NAT instance ID.";
+ }
+
+ leaf notify-pool-threshold {
+ type percent;
+ // mandatory true;
+ description
+ "A treshhold has been fired.";
+ }
+ }
+} //module nat \ No newline at end of file
diff --git a/nat/nat-api/src/main/yang/interface-nat.yang b/nat/nat-api/src/main/yang/interface-nat.yang
new file mode 100644
index 000000000..43a6bf0c4
--- /dev/null
+++ b/nat/nat-api/src/main/yang/interface-nat.yang
@@ -0,0 +1,44 @@
+module interface-nat {
+ yang-version 1;
+ namespace "urn:opendaylight:params:xml:ns:yang:interface:nat";
+ prefix "ifc-nat";
+
+ revision "2016-12-14" {
+ description "Initial revision of v3po model";
+ }
+
+ import ietf-interfaces {
+ prefix "if";
+ }
+ import ietf-nat {
+ prefix "nat";
+ }
+ import yang-ext {
+ prefix "ext";
+ }
+
+ description "Augmentations to interfaces model to connect interfaces with nat configuration";
+
+ grouping interface-nat-attributes {
+ container nat {
+ container inbound {
+ presence "Enables inbound NAT";
+ }
+ container outbound {
+ presence "Enables outbound NAT";
+ }
+ }
+ }
+
+ augment /if:interfaces/if:interface {
+ ext:augment-identifier "nat-interface-augmentation";
+
+ uses interface-nat-attributes;
+ }
+
+ augment /if:interfaces-state/if:interface {
+ ext:augment-identifier "nat-interface-state-augmentation";
+
+ uses interface-nat-attributes;
+ }
+} \ No newline at end of file
diff --git a/nat/nat-api/src/main/yang/nat-context.yang b/nat/nat-api/src/main/yang/nat-context.yang
new file mode 100644
index 000000000..dd17ed58c
--- /dev/null
+++ b/nat/nat-api/src/main/yang/nat-context.yang
@@ -0,0 +1,64 @@
+module nat-context {
+ yang-version 1;
+ namespace "urn:honeycomb:params:xml:ns:yang:nat:context";
+ prefix "nc";
+
+ description "Context for nat mapping";
+
+ revision "2016-12-14" {
+ description "Initial revision.";
+ }
+
+ import ietf-inet-types {
+ prefix "inet";
+ }
+
+ import naming-context {
+ prefix "nc";
+ }
+
+ import yang-ext {
+ prefix "ext";
+ }
+
+ grouping mapping-entry-context-attributes {
+ container nat-mapping-entry-context {
+ list nat-instance {
+ key "id";
+
+ leaf id {
+ type uint32;
+ description "ID of the NAT instance from ietf-nat. Maps to VRF-ID in VPP";
+ }
+
+ container mapping-table {
+ list mapping-entry {
+
+ key "internal external";
+ unique "index";
+
+ leaf internal {
+ type inet:ip-address;
+ description "Local IP address set in VPP";
+ }
+
+ leaf external {
+ type inet:ip-address;
+ description "Extarnal IP address set in VPP";
+ }
+
+ leaf index {
+ type uint32;
+ description "ID of the NAT's mapping entry from ietf-nat";
+ }
+ }
+ }
+ }
+ }
+ }
+
+ augment /nc:contexts {
+ ext:augment-identifier "nat-mapping-entry-ctx-augmentation";
+ uses mapping-entry-context-attributes;
+ }
+} \ No newline at end of file