module openconfig-system-logging {

    yang-version 1;

    namespace
      "http://openconfig.net/yang/system/logging";

    prefix oc-log;

    import openconfig-extensions {
      prefix oc-ext;
    }
    import openconfig-inet-types {
      prefix oc-inet;
    }

    organization "OpenConfig working group";

    contact
      "OpenConfig working group
www.openconfig.net";

    description
      "This module defines configuration and operational state data
for common logging facilities on network systems.";

    revision "2017-09-18" {
      description
        "Updated to use OpenConfig types modules";
      reference
        "0.3.0";

    }

    revision "2017-07-06" {
      description
        "Move to oc-inet types, add IETF attribution, add RADIUS
counters, changed password leaf names to indicate hashed";
      reference
        "0.2.0";

    }

    revision "2017-01-29" {
      description "Initial public release";
      reference
        "0.1.0";

    }

    oc-ext:openconfig-version "0.3.0";

    identity SYSLOG_FACILITY {
      description
        "Base identity for Syslog message facilities.";
      reference
        "IETF RFC 5424 - The Syslog Protocol";

    }

    identity ALL {
      base SYSLOG_FACILITY;
      description "All supported facilities";
    }

    identity KERNEL {
      base SYSLOG_FACILITY;
      description
        "The facility for kernel messages";
      reference
        "IETF RFC 5424 - The Syslog Protocol";

    }

    identity USER {
      base SYSLOG_FACILITY;
      description
        "The facility for user-level messages.";
      reference
        "IETF RFC 5424 - The Syslog Protocol";

    }

    identity MAIL {
      base SYSLOG_FACILITY;
      description
        "The facility for the mail system.";
      reference
        "IETF RFC 5424 - The Syslog Protocol";

    }

    identity SYSTEM_DAEMON {
      base SYSLOG_FACILITY;
      description
        "The facility for the system daemons.";
      reference
        "IETF RFC 5424 - The Syslog Protocol";

    }

    identity AUTH {
      base SYSLOG_FACILITY;
      description
        "The facility for security/authorization messages.";
      reference
        "IETF RFC 5424 - The Syslog Protocol";

    }

    identity SYSLOG {
      base SYSLOG_FACILITY;
      description
        "The facility for messages generated internally by syslogd
facility.";
      reference
        "IETF RFC 5424 - The Syslog Protocol";

    }

    identity AUTHPRIV {
      base SYSLOG_FACILITY;
      description
        "The facility for privileged security/authorization messages.";
      reference
        "IETF RFC 5424 - The Syslog Protocol";

    }

    identity NTP {
      base SYSLOG_FACILITY;
      description
        "The facility for the NTP subsystem.";
      reference
        "IETF RFC 5424 - The Syslog Protocol";

    }

    identity AUDIT {
      base SYSLOG_FACILITY;
      description
        "The facility for log audit messages.";
      reference
        "IETF RFC 5424 - The Syslog Protocol";

    }

    identity CONSOLE {
      base SYSLOG_FACILITY;
      description
        "The facility for log alert messages.";
      reference
        "IETF RFC 5424 - The Syslog Protocol";

    }

    identity LOCAL0 {
      base SYSLOG_FACILITY;
      description
        "The facility for local use 0 messages.";
      reference
        "IETF RFC 5424 - The Syslog Protocol";

    }

    identity LOCAL1 {
      base SYSLOG_FACILITY;
      description
        "The facility for local use 1 messages.";
      reference
        "IETF RFC 5424 - The Syslog Protocol";

    }

    identity LOCAL2 {
      base SYSLOG_FACILITY;
      description
        "The facility for local use 2 messages.";
      reference
        "IETF RFC 5424 - The Syslog Protocol";

    }

    identity LOCAL3 {
      base SYSLOG_FACILITY;
      description
        "The facility for local use 3 messages.";
      reference
        "IETF RFC 5424 - The Syslog Protocol";

    }

    identity LOCAL4 {
      base SYSLOG_FACILITY;
      description
        "The facility for local use 4 messages.";
      reference
        "IETF RFC 5424 - The Syslog Protocol";

    }

    identity LOCAL5 {
      base SYSLOG_FACILITY;
      description
        "The facility for local use 5 messages.";
      reference
        "IETF RFC 5424 - The Syslog Protocol";

    }

    identity LOCAL6 {
      base SYSLOG_FACILITY;
      description
        "The facility for local use 6 messages.";
      reference
        "IETF RFC 5424 - The Syslog Protocol";

    }

    identity LOCAL7 {
      base SYSLOG_FACILITY;
      description
        "The facility for local use 7 messages.";
      reference
        "IETF RFC 5424 - The Syslog Protocol";

    }

    identity LOG_DESTINATION_TYPE {
      description
        "Base identity for destination for logging messages";
    }

    identity DEST_CONSOLE {
      base LOG_DESTINATION_TYPE;
      description
        "Directs log messages to the console";
    }

    identity DEST_BUFFER {
      base LOG_DESTINATION_TYPE;
      description
        "Directs log messages to and in-memory circular buffer";
    }

    identity DEST_FILE {
      base LOG_DESTINATION_TYPE;
      description
        "Directs log messages to a local file";
    }

    identity DEST_REMOTE {
      base LOG_DESTINATION_TYPE;
      description
        "Directs log messages to a remote syslog server";
    }

    typedef syslog-severity {
      type enumeration {
        enum "EMERGENCY" {
          value 0;
          description
            "Emergency: system is unusable (0)";
        }
        enum "ALERT" {
          value 1;
          description
            "Alert: action must be taken immediately (1)";
        }
        enum "CRITICAL" {
          value 2;
          description
            "Critical: critical conditions (2)";
        }
        enum "ERROR" {
          value 3;
          description
            "Error: error conditions (3)";
        }
        enum "WARNING" {
          value 4;
          description
            "Warning: warning conditions (4)";
        }
        enum "NOTICE" {
          value 5;
          description
            "Notice: normal but significant  condition(5)";
        }
        enum "INFORMATIONAL" {
          value 6;
          description
            "Informational: informational messages (6)";
        }
        enum "DEBUG" {
          value 7;
          description
            "Debug: debug-level messages (7)";
        }
      }
      description
        "Syslog message severities";
      reference
        "IETF RFC 5424 - The Syslog Protocol";

    }

    grouping logging-selectors-config {
      description
        "Configuration data for logging selectors";
      leaf facility {
        type identityref {
          base SYSLOG_FACILITY;
        }
        description
          "Specifies the facility, or class of messages to log";
      }

      leaf severity {
        type syslog-severity;
        description
          "Specifies that only messages of the given severity (or
greater severity) for the corresonding facility are logged";
      }
    }  // grouping logging-selectors-config

    grouping logging-selectors-state {
      description
        "Operational state data for logging selectors";
    }  // grouping logging-selectors-state

    grouping logging-selectors-top {
      description
        "Top-level grouping for the logging selector list";
      container selectors {
        description "Enclosing container ";
        list selector {
          key "facility severity";
          description
            "List of selectors for log messages";
          leaf facility {
            type leafref {
              path "../config/facility";
            }
            description
              "Reference to facility list key";
          }

          leaf severity {
            type leafref {
              path "../config/severity";
            }
            description
              "Reference to severity list key";
          }

          container config {
            description
              "Configuration data ";
            uses logging-selectors-config;
          }  // container config

          container state {
            config false;
            description
              "Operational state data ";
            uses logging-selectors-config;

            uses logging-selectors-state;
          }  // container state
        }  // list selector
      }  // container selectors
    }  // grouping logging-selectors-top

    grouping logging-console-config {
      description
        "Configuration data for console logging";
    }  // grouping logging-console-config

    grouping logging-console-state {
      description
        "Operational state data for console logging";
    }  // grouping logging-console-state

    grouping logging-console-top {
      description
        "Top-level grouping for console logging data";
      container console {
        description
          "Top-level container for data related to console-based
logging";
        container config {
          description
            "Configuration data for console logging";
          uses logging-console-config;
        }  // container config

        container state {
          config false;
          description
            "Operational state data for console logging";
          uses logging-console-config;

          uses logging-console-state;
        }  // container state

        uses logging-selectors-top;
      }  // container console
    }  // grouping logging-console-top

    grouping logging-remote-config {
      description
        "Configuration data for remote log servers";
      leaf host {
        type oc-inet:host;
        description
          "IP address or hostname of the remote log server";
      }

      leaf source-address {
        type oc-inet:ip-address;
        description
          "Source IP address for packets to the log server";
      }

      leaf remote-port {
        type oc-inet:port-number;
        default "514";
        description
          "Sets the destination port number for syslog UDP messages to
the server.  The default for syslog is 514.";
      }
    }  // grouping logging-remote-config

    grouping logging-remote-state {
      description
        "Operational state data for remote log servers";
    }  // grouping logging-remote-state

    grouping logging-remote-top {
      description
        "Top-level grouping for remote log servers";
      container remote-servers {
        description
          "Enclosing container for the list of remote log servers";
        list remote-server {
          key "host";
          description
            "List of remote log servers";
          leaf host {
            type leafref {
              path "../config/host";
            }
            description
              "Reference to the host list key";
          }

          container config {
            description
              "Configuration data for remote log servers";
            uses logging-remote-config;
          }  // container config

          container state {
            config false;
            description
              "Operational state data for remote log servers";
            uses logging-remote-config;

            uses logging-remote-state;
          }  // container state

          uses logging-selectors-top;
        }  // list remote-server
      }  // container remote-servers
    }  // grouping logging-remote-top

    grouping logging-top {
      description
        "Top-level grouping for logging data";
      container logging {
        description
          "Top-level container for data related to logging / syslog";
        uses logging-console-top;

        uses logging-remote-top;
      }  // container logging
    }  // grouping logging-top
  }  // module openconfig-system-logging