module naf-filter-configuration {
    yang-version 1.1;
    namespace "http://metaswitch.com/yang/tas-vm-build/naf-filter-configuration";
    prefix "naf-filter";

    import cassandra-configuration {
        prefix "cassandra";
        revision-date 2019-11-29;
    }

    import extensions {
        prefix "yangdoc";
        revision-date 2020-12-02;
    }

    organization "Metaswitch Networks";
    contact "rvt-schemas@metaswitch.com";
    description "NAF filter configuration schema.";

    revision 2019-11-29 {
        description
            "Initial revision";
        reference
            "Metaswitch Deployment Definition Guide";
    }

    grouping naf-filter-configuration-grouping {
        leaf service-type {
            type uint8;
            default 0;
            description "Identifies the type of service the NAF filter is providing.
                         Recognised values for this setting are defined in Annex B of
                         3GPP TS 29.109. Affects which settings are selected from the GUSS.";
        }

        leaf service-id {
            type uint16;
            default 0;
            description "An operator specific identifier that uniquely identifies the service the
                         NAF filter is providing within the network. Affects which settings
                         are selected from the GUSS.";
        }

        leaf naf-group {
            type string;
            default "";
            description "Identifies the group that the NAF filter belongs to. Affects which
                         settings are selected from the GUSS.";
        }

        leaf-list force-auth-on-paths {
            type string;
            default "/rem/auth-check";
            description "A list of URL path prefixes for which authentication should always be
                         enforced, even for requests from trusted entities.";
        }

        container cassandra-connectivity {
            uses cassandra:cassandra-connectivity-grouping;
            description "Cassandra connectivity configuration for the NAF filter";
        }

        container nonce-options {
            uses nonce-options-grouping;
            description "Settings for how the NAF filter handles nonce values";
        }

        leaf debug-logging-enabled {
            type boolean;
            default false;
            description "Enable extensive logging for verification and issue diagnosis during
                         acceptance testing. Must not be enabled in production.";
        }

        leaf intercept-tomcat-errors {
            type boolean;
            default false;
            description "Let NGINX intercept Tomcat errors and replace them with default errors.
                         Use only on advice of your Customer Care representative.";
            yangdoc:change-impact "contact";
        }

        leaf http-version {
            type enumeration {
                enum 1.0 {
                    description "Use HTTP version 1.0.";
                }
                enum 1.1 {
                    description "Use HTTP version 1.1.";
                }
            }
            default 1.1;
            description "HTTP version to use on the Ub (BSF) and Ua/Ut (NAF) interfaces.";
            yangdoc:change-impact "contact";
        }

        description "The Network Application Functions (NAF) filter configuration.";
    }

    grouping nonce-options-grouping {
        leaf reuse-count {
            type uint32;
            default 100;
            description "The maximum number of times a nonce can be reused by incrementing the
                         nonce count.";
        }

        leaf lifetime-milliseconds {
            type uint32;
            default 180000;
            description "The time that a nonce remains valid for after being generated
                         (in milliseconds).";
        }

        leaf cache-capacity {
            type uint32 {
                range "1 .. max";
            }
            default 100000;
            description "The capacity of the nonce cache. This setting is only relevant when
                         using the local storage mechanism.";
        }

        leaf storage-mechanism {
            type enumeration {
                enum cassandra {
                    description "Use Cassandra storage.";
                }
                enum local {
                    description "Use local storage.";
                }
            }
            default local;
            description "The storage mechanism to use for the nonce cache.";
        }

        leaf nonce-cassandra-keyspace {
            type string;
            default "opencloud_nonce_info";
            description "The Cassandra keyspace for the nonce cache. This setting is only relevant
                         when using the Cassandra storage mechanism.";
        }

        description "Nonce option configuration.";
    }
}
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