container/Sources/Containerization/SandboxContext/SandboxContext.proto

syntax = "proto3";

package com.apple.containerization.sandbox.v3;

import "google/protobuf/timestamp.proto";

// Context for interacting with a container's runtime environment.
service SandboxContext {
  // Mount a filesystem.
  rpc Mount(MountRequest) returns (MountResponse);
  // Unmount a filesystem.
  rpc Umount(UmountRequest) returns (UmountResponse);
  // Set an environment variable on the init process.
  rpc Setenv(SetenvRequest) returns (SetenvResponse);
  // Get an environment variable from the init process.
  rpc Getenv(GetenvRequest) returns (GetenvResponse);
  // Create a new directory inside the sandbox.
  rpc Mkdir(MkdirRequest) returns (MkdirResponse);
  // Set sysctls in the context of the sandbox.
  rpc Sysctl(SysctlRequest) returns (SysctlResponse);
  // Set time in the guest.
  rpc SetTime(SetTimeRequest) returns (SetTimeResponse);
  // Set up an emulator in the guest for a specific binary format.
  rpc SetupEmulator(SetupEmulatorRequest) returns (SetupEmulatorResponse);
  // Write data to an existing or new file.
  rpc WriteFile(WriteFileRequest) returns (WriteFileResponse);

  // Create a new process inside the container.
  rpc CreateProcess(CreateProcessRequest) returns (CreateProcessResponse);
  // Delete an existing process inside the container.
  rpc DeleteProcess(DeleteProcessRequest) returns (DeleteProcessResponse);
  // Start the provided process.
  rpc StartProcess(StartProcessRequest) returns (StartProcessResponse);
  // Send a signal to the provided process.
  rpc KillProcess(KillProcessRequest) returns (KillProcessResponse);
  // Wait for a process to exit and return the exit code.
  rpc WaitProcess(WaitProcessRequest) returns (WaitProcessResponse);
  // Resize the tty of a given process. This will error if the process does
  // not have a pty allocated.
  rpc ResizeProcess(ResizeProcessRequest) returns (ResizeProcessResponse);
  // Close IO for a given process.
  rpc CloseProcessStdin(CloseProcessStdinRequest) returns (CloseProcessStdinResponse);

  // Get statistics for containers.
  rpc ContainerStatistics(ContainerStatisticsRequest) returns (ContainerStatisticsResponse);

  // Proxy a vsock port to a unix domain socket in the guest, or vice versa.
  rpc ProxyVsock(ProxyVsockRequest) returns (ProxyVsockResponse);
  // Stop a vsock proxy to a unix domain socket.
  rpc StopVsockProxy(StopVsockProxyRequest) returns (StopVsockProxyResponse);

  // Set the link state of a network interface.
  rpc IpLinkSet(IpLinkSetRequest) returns (IpLinkSetResponse);
  // Add an IPv4 address to a network interface.
  rpc IpAddrAdd(IpAddrAddRequest) returns (IpAddrAddResponse);
  // Add an IP route for a network interface.
  rpc IpRouteAddLink(IpRouteAddLinkRequest) returns (IpRouteAddLinkResponse);
  // Add an IP route for a network interface.
  rpc IpRouteAddDefault(IpRouteAddDefaultRequest) returns (IpRouteAddDefaultResponse);
  // Configure DNS resolver.
  rpc ConfigureDns(ConfigureDnsRequest) returns (ConfigureDnsResponse);
  // Configure /etc/hosts.
  rpc ConfigureHosts(ConfigureHostsRequest) returns (ConfigureHostsResponse);

  // Perform the sync syscall.
  rpc Sync(SyncRequest) returns (SyncResponse);
  // Send a signal to a process via the PID.
  rpc Kill(KillRequest) returns (KillResponse);
}

message Stdio {
  optional int32 stdinPort = 1;
  optional int32 stdoutPort = 2;
  optional int32 stderrPort = 3;
}

message SetupEmulatorRequest {
  string binary_path = 1;
  string name = 2;
  string type = 3;
  string offset = 4;
  string magic = 5;
  string mask = 6;
  string flags = 7;
}

message SetupEmulatorResponse {}

message SetTimeRequest {
  int64 sec = 1;
  int32 usec = 2;
}

message SetTimeResponse {}

message SysctlRequest { map<string, string> settings = 1; }

message SysctlResponse {}

message ProxyVsockRequest {
  enum Action {
    INTO = 0;
    OUT_OF = 1;
  }
  string id = 1;
  uint32 vsock_port = 2;
  string guestPath = 3;
  optional uint32 guestSocketPermissions = 4;
  Action action = 5;
}

message ProxyVsockResponse {}

message StopVsockProxyRequest { string id = 1; }

message StopVsockProxyResponse {}

message MountRequest {
  string type = 1;
  string source = 2;
  string destination = 3;
  repeated string options = 4;
}

message MountResponse {}

message UmountRequest {
  string path = 1;
  int32 flags = 2;
}

message UmountResponse {}

message SetenvRequest {
  string key = 1;
  optional string value = 2;
}

message SetenvResponse {}

message GetenvRequest { string key = 1; }

message GetenvResponse { optional string value = 1; }

message CreateProcessRequest {
  string id = 1;
  optional string containerID = 2;
  optional uint32 stdin = 3;
  optional uint32 stdout = 4;
  optional uint32 stderr = 5;
  bytes configuration = 6;
  optional bytes options = 7;
}

message CreateProcessResponse {}

message WaitProcessRequest {
  string id = 1;
  optional string containerID = 2;
}

message WaitProcessResponse {
  int32 exitCode = 1;
  google.protobuf.Timestamp exited_at = 2;
}

message ResizeProcessRequest {
  string id = 1;
  optional string containerID = 2;
  uint32 rows = 3;
  uint32 columns = 4;
}

message ResizeProcessResponse {}

message DeleteProcessRequest {
  string id = 1;
  optional string containerID = 2;
}

message DeleteProcessResponse {}

message StartProcessRequest { 
  string id = 1;
  optional string containerID = 2;
}

message StartProcessResponse { int32 pid = 1; }

message KillProcessRequest {
  string id = 1;
  optional string containerID = 2;
  int32 signal = 3;
}

message KillProcessResponse { int32 result = 1; }

message CloseProcessStdinRequest {
  string id = 1;
  optional string containerID = 2;
}

message CloseProcessStdinResponse {}

message MkdirRequest {
  string path = 1;
  bool all = 2;
  uint32 perms = 3;
}

message MkdirResponse {}

message WriteFileRequest {
  message WriteFileFlags {
    bool create_parent_dirs = 1;
    bool append = 2;
    bool create_if_missing = 3;
  }
  string path = 1;
  bytes data = 2;
  uint32 mode = 3;
  WriteFileFlags flags = 4;
}

message WriteFileResponse {}

message IpLinkSetRequest {
  string interface = 1;
  bool up = 2;
  optional uint32 mtu = 3;
}

message IpLinkSetResponse {}

message IpAddrAddRequest {
  string interface = 1;
  string address = 2;
}

message IpAddrAddResponse {}

message IpRouteAddLinkRequest {
  string interface = 1;
  string address = 2;
  string srcAddr = 3;
}

message IpRouteAddLinkResponse {}

message IpRouteAddDefaultRequest {
  string interface = 1;
  string gateway = 2;
}

message IpRouteAddDefaultResponse {}

message ConfigureDnsRequest {
  string location = 1;
  repeated string nameservers = 2;
  optional string domain = 3;
  repeated string searchDomains = 4;
  repeated string options = 5;
}

message ConfigureDnsResponse {}

message ConfigureHostsRequest {
  message HostsEntry {
    string ipAddress = 1;
    repeated string hostnames = 2;
    optional string comment = 3;
  }
  string location = 1;
  repeated HostsEntry entries = 2;
  optional string comment = 3;
}

message ConfigureHostsResponse {}

message SyncRequest {}
message SyncResponse {}

message KillRequest {
  int32 pid = 1;
  int32 signal = 3;
}

message KillResponse { int32 result = 1; }

message ContainerStatisticsRequest {
  repeated string container_ids = 1;  // Empty = all containers
}

message ContainerStatisticsResponse {
  repeated ContainerStats containers = 1;
}

message ContainerStats {
  string container_id = 1;
  ProcessStats process = 2;
  MemoryStats memory = 3;
  CPUStats cpu = 4;
  BlockIOStats block_io = 5;
  repeated NetworkStats networks = 6;
}

message ProcessStats {
  uint64 current = 1;
  uint64 limit = 2;  // 0 or max value = unlimited
}

message MemoryStats {
  uint64 usage_bytes = 1;
  uint64 limit_bytes = 2;
  uint64 swap_usage_bytes = 3;
  uint64 swap_limit_bytes = 4;
  uint64 cache_bytes = 5;
  uint64 kernel_stack_bytes = 6;
  uint64 slab_bytes = 7;
  uint64 page_faults = 8;
  uint64 major_page_faults = 9;
}

message CPUStats {
  uint64 usage_usec = 1;
  uint64 user_usec = 2;
  uint64 system_usec = 3;
  uint64 throttling_periods = 4;
  uint64 throttled_periods = 5;
  uint64 throttled_time_usec = 6;
}

message BlockIOStats {
  repeated BlockIOEntry devices = 1;
}

message BlockIOEntry {
  uint64 major = 1;
  uint64 minor = 2;
  uint64 read_bytes = 3;
  uint64 write_bytes = 4;
  uint64 read_operations = 5;
  uint64 write_operations = 6;
}

message NetworkStats {
  string interface = 1;
  uint64 receivedPackets = 2;
  uint64 transmittedPackets = 3;
  uint64 receivedBytes = 4;
  uint64 transmittedBytes = 5;
  uint64 receivedErrors = 6;
  uint64 transmittedErrors = 7;
}