// Copyright 2026 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

syntax = "proto2";

option optimize_for = LITE_RUNTIME;

package remoting.ftl;

// WebRTC ICE candidate details.
// https://www.w3.org/TR/webrtc/#rtcicecandidate-interface
message IceCandidate {
  // The ICE candidate string, containing foundation, component, priority,
  // address, port, type, etc.
  optional string candidate = 1;

  // If present, identifies the media stream ("mid") associated with the
  // candidate.
  optional string sdp_mid = 2;

  // If present, indicates the zero-based index of the m-line in the SDP
  // associated with the candidate.
  optional int32 sdp_m_line_index = 3;
}

// WebRTC session description (SDP).
// https://www.w3.org/TR/webrtc/#rtcsessiondescription-class
message SessionDescription {
  enum SdpType {
    SDP_TYPE_UNSPECIFIED = 0;
    OFFER = 1;
    ANSWER = 2;
  }
  // WebRTC SDP Type as defined in https://www.w3.org/TR/webrtc/#rtcsdptype.
  optional SdpType type = 1;

  // A serialized string representation of the sdp.
  optional string sdp = 2;

  // Base64-encoded HMAC of the SDP description, for validation.
  optional bytes signature = 3;
}