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+// SPDX-License-Identifier: BSD-2-Clause
+//
+// Copyright 2019 FRRouting
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+//
+// 1. Redistributions of source code must retain the above copyright notice,
+// this list of conditions and the following disclaimer.
+//
+// 2. Redistributions in binary form must reproduce the above copyright
+// notice, this list of conditions and the following disclaimer in the
+// documentation and/or other materials provided with the distribution.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS
+// BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+// OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+// THE POSSIBILITY OF SUCH DAMAGE.
+//
+
+syntax = "proto3";
+
+package frr;
+
+// Service specification for the FRR northbound interface.
+service Northbound {
+ // Retrieve the capabilities supported by the target.
+ rpc GetCapabilities(GetCapabilitiesRequest) returns (GetCapabilitiesResponse) {}
+
+ // Retrieve configuration data, state data or both from the target.
+ rpc Get(GetRequest) returns (stream GetResponse) {}
+
+ // Create a new candidate configuration and return a reference to it. The
+ // created candidate is a copy of the running configuration.
+ rpc CreateCandidate(CreateCandidateRequest) returns (CreateCandidateResponse) {}
+
+ // Delete a candidate configuration.
+ rpc DeleteCandidate(DeleteCandidateRequest) returns (DeleteCandidateResponse) {}
+
+ // Update a candidate configuration by rebasing the changes on top of the
+ // latest running configuration. Resolve conflicts automatically by giving
+ // preference to the changes done in the candidate configuration.
+ rpc UpdateCandidate(UpdateCandidateRequest) returns (UpdateCandidateResponse) {}
+
+ // Edit a candidate configuration. All changes are discarded if any error
+ // happens.
+ rpc EditCandidate(EditCandidateRequest) returns (EditCandidateResponse) {}
+
+ // Load configuration data into a candidate configuration. Both merge and
+ // replace semantics are supported.
+ rpc LoadToCandidate(LoadToCandidateRequest) returns (LoadToCandidateResponse) {}
+
+ // Create a new configuration transaction using a two-phase commit protocol.
+ rpc Commit(CommitRequest) returns (CommitResponse) {}
+
+ // List the metadata of all configuration transactions recorded in the
+ // transactions database.
+ rpc ListTransactions(ListTransactionsRequest) returns (stream ListTransactionsResponse) {}
+
+ // Fetch a configuration (identified by its transaction ID) from the
+ // transactions database.
+ rpc GetTransaction(GetTransactionRequest) returns (GetTransactionResponse) {}
+
+ // Lock the running configuration, preventing other users from changing it.
+ rpc LockConfig(LockConfigRequest) returns (LockConfigResponse) {}
+
+ // Unlock the running configuration.
+ rpc UnlockConfig(UnlockConfigRequest) returns (UnlockConfigResponse) {}
+
+ // Execute a YANG RPC.
+ rpc Execute(ExecuteRequest) returns (ExecuteResponse) {}
+}
+
+// ----------------------- Parameters and return types -------------------------
+
+//
+// RPC: GetCapabilities()
+//
+message GetCapabilitiesRequest {
+ // Empty.
+}
+
+message GetCapabilitiesResponse {
+ // Return values:
+ // - grpc::StatusCode::OK: Success.
+
+ // FRR version.
+ string frr_version = 1;
+
+ // Indicates whether FRR was compiled with support for configuration
+ // rollbacks or not (--enable-config-rollbacks).
+ bool rollback_support = 2;
+
+ // Supported schema modules.
+ repeated ModuleData supported_modules = 3;
+
+ // Supported encodings.
+ repeated Encoding supported_encodings = 4;
+}
+
+//
+// RPC: Get()
+//
+message GetRequest {
+ // Type of elements within the data tree.
+ enum DataType {
+ // All data elements.
+ ALL = 0;
+
+ // Config elements.
+ CONFIG = 1;
+
+ // State elements.
+ STATE = 2;
+ }
+
+ // The type of data being requested.
+ DataType type = 1;
+
+ // Encoding to be used.
+ Encoding encoding = 2;
+
+ // Include implicit default nodes.
+ bool with_defaults = 3;
+
+ // Paths requested by the client.
+ repeated string path = 4;
+}
+
+message GetResponse {
+ // Return values:
+ // - grpc::StatusCode::OK: Success.
+ // - grpc::StatusCode::INVALID_ARGUMENT: Invalid YANG data path.
+
+ // Timestamp in nanoseconds since Epoch.
+ int64 timestamp = 1;
+
+ // The requested data.
+ DataTree data = 2;
+}
+
+//
+// RPC: CreateCandidate()
+//
+message CreateCandidateRequest {
+ // Empty.
+}
+
+message CreateCandidateResponse {
+ // Return values:
+ // - grpc::StatusCode::OK: Success.
+ // - grpc::StatusCode::RESOURCE_EXHAUSTED: can't create candidate
+ // configuration.
+
+ // Handle to the new created candidate configuration.
+ uint32 candidate_id = 1;
+}
+
+//
+// RPC: DeleteCandidate()
+//
+message DeleteCandidateRequest {
+ // Candidate configuration to delete.
+ uint32 candidate_id = 1;
+}
+
+message DeleteCandidateResponse {
+ // Return values:
+ // - grpc::StatusCode::OK: Success.
+ // - grpc::StatusCode::NOT_FOUND: Candidate wasn't found.
+}
+
+//
+// RPC: UpdateCandidate()
+//
+message UpdateCandidateRequest {
+ // Candidate configuration to update.
+ uint32 candidate_id = 1;
+}
+
+message UpdateCandidateResponse {
+ // Return values:
+ // - grpc::StatusCode::OK: Success.
+ // - grpc::StatusCode::NOT_FOUND: Candidate wasn't found.
+}
+
+//
+// RPC: EditCandidate()
+//
+message EditCandidateRequest {
+ // Candidate configuration that is going to be edited.
+ uint32 candidate_id = 1;
+
+ // Data elements to be created or updated.
+ repeated PathValue update = 2;
+
+ // Paths to be deleted from the data tree.
+ repeated PathValue delete = 3;
+}
+
+message EditCandidateResponse {
+ // Return values:
+ // - grpc::StatusCode::OK: Success.
+ // - grpc::StatusCode::NOT_FOUND: Candidate wasn't found.
+ // - grpc::StatusCode::INVALID_ARGUMENT: An error occurred while editing the
+ // candidate configuration.
+}
+
+//
+// RPC: LoadToCandidate()
+//
+message LoadToCandidateRequest {
+ enum LoadType {
+ // Merge the data tree into the candidate configuration.
+ MERGE = 0;
+
+ // Replace the candidate configuration by the provided data tree.
+ REPLACE = 1;
+ }
+
+ // Candidate configuration that is going to be edited.
+ uint32 candidate_id = 1;
+
+ // Load operation to apply.
+ LoadType type = 2;
+
+ // Configuration data.
+ DataTree config = 3;
+}
+
+message LoadToCandidateResponse {
+ // Return values:
+ // - grpc::StatusCode::OK: Success.
+ // - grpc::StatusCode::INVALID_ARGUMENT: An error occurred while performing
+ // the load operation.
+}
+
+//
+// RPC: Commit()
+//
+message CommitRequest {
+ enum Phase {
+ // Validate if the configuration changes are valid (phase 0).
+ VALIDATE = 0;
+
+ // Prepare resources to apply the configuration changes (phase 1).
+ PREPARE = 1;
+
+ // Release previously allocated resources (phase 2).
+ ABORT = 2;
+
+ // Apply the configuration changes (phase 2).
+ APPLY = 3;
+
+ // All of the above (VALIDATE + PREPARE + ABORT/APPLY).
+ //
+ // This option can't be used to implement network-wide transactions,
+ // since they require the manager entity to take into account the results
+ // of the preparation phase of multiple managed devices.
+ ALL = 4;
+ }
+
+ // Candidate configuration that is going to be committed.
+ uint32 candidate_id = 1;
+
+ // Transaction phase.
+ Phase phase = 2;
+
+ // Assign a comment to this commit.
+ string comment = 3;
+}
+
+message CommitResponse {
+ // Return values:
+ // - grpc::StatusCode::OK: Success.
+ // - grpc::StatusCode::FAILED_PRECONDITION: misuse of the two-phase commit
+ // protocol.
+ // - grpc::StatusCode::INVALID_ARGUMENT: Validation error.
+ // - grpc::StatusCode::RESOURCE_EXHAUSTED: Failure to allocate resource.
+
+ // ID of the created configuration transaction (when the phase is APPLY
+ // or ALL).
+ uint32 transaction_id = 1;
+
+ // Human-readable error or warning message(s).
+ string error_message = 2;
+}
+
+//
+// RPC: ListTransactions()
+//
+message ListTransactionsRequest {
+ // Empty.
+}
+
+message ListTransactionsResponse {
+ // Return values:
+ // - grpc::StatusCode::OK: Success.
+
+ // Transaction ID.
+ uint32 id = 1;
+
+ // Client that committed the transaction.
+ string client = 2;
+
+ // Date and time the transaction was committed.
+ string date = 3;
+
+ // Comment assigned to the transaction.
+ string comment = 4;
+}
+
+//
+// RPC: GetTransaction()
+//
+message GetTransactionRequest {
+ // Transaction to retrieve.
+ uint32 transaction_id = 1;
+
+ // Encoding to be used.
+ Encoding encoding = 2;
+
+ // Include implicit default nodes.
+ bool with_defaults = 3;
+}
+
+message GetTransactionResponse {
+ // Return values:
+ // - grpc::StatusCode::OK: Success.
+ // - grpc::StatusCode::NOT_FOUND: Transaction wasn't found in the transactions
+ // database.
+
+ DataTree config = 1;
+}
+
+//
+// RPC: LockConfig()
+//
+message LockConfigRequest {
+ // Empty.
+}
+
+message LockConfigResponse {
+ // Return values:
+ // - grpc::StatusCode::OK: Success.
+ // - grpc::StatusCode::FAILED_PRECONDITION: Running configuration is
+ // locked already.
+}
+
+//
+// RPC: UnlockConfig()
+//
+message UnlockConfigRequest {
+ // Empty.
+}
+
+message UnlockConfigResponse {
+ // Return values:
+ // - grpc::StatusCode::OK: Success.
+ // - grpc::StatusCode::FAILED_PRECONDITION: Running configuration isn't
+ // locked.
+}
+
+//
+// RPC: Execute()
+//
+message ExecuteRequest {
+ // Path of the YANG RPC or YANG Action.
+ string path = 1;
+
+ // Input parameters.
+ repeated PathValue input = 2;
+}
+
+message ExecuteResponse {
+ // Return values:
+ // - grpc::StatusCode::OK: Success.
+
+ // Output parameters.
+ repeated PathValue output = 1;
+}
+
+// -------------------------------- Definitions --------------------------------
+
+// YANG module.
+message ModuleData {
+ // Name of the YANG module;
+ string name = 1;
+
+ // Organization publishing the module.
+ string organization = 2;
+
+ // Latest revision of the module;
+ string revision = 3;
+}
+
+// Supported encodings for YANG instance data.
+enum Encoding {
+ JSON = 0;
+ XML = 1;
+}
+
+// Path-value pair representing a data element.
+message PathValue {
+ // YANG data path.
+ string path = 1;
+
+ // Data value.
+ string value = 2;
+}
+
+// YANG instance data.
+message DataTree {
+ Encoding encoding = 1;
+ string data = 2;
+}