syntax = "proto3";

// package syscall_rpc is a set of networking related system calls that can be
// forwarded to a socket gofer.
//
// TODO: Document individual RPCs.
package syscall_rpc;

message SendmsgRequest {
  uint32 fd = 1;
  bytes data = 2 [ctype = CORD];
  bytes address = 3;
  bool more = 4;
  bool end_of_record = 5;
}

message SendmsgResponse {
  oneof result {
    uint32 error_number = 1;
    uint32 length = 2;
  }
}

message IOCtlRequest {
  uint32 fd = 1;
  uint32 cmd = 2;
  bytes arg = 3;
}

message IOCtlResponse {
  oneof result {
    uint32 error_number = 1;
    bytes value = 2;
  }
}

message RecvmsgRequest {
  uint32 fd = 1;
  uint32 length = 2;
  bool sender = 3;
  bool peek = 4;
  bool trunc = 5;
  uint32 cmsg_length = 6;
}

message OpenRequest {
  bytes path = 1;
  uint32 flags = 2;
  uint32 mode = 3;
}

message OpenResponse {
  oneof result {
    uint32 error_number = 1;
    uint32 fd = 2;
  }
}

message ReadRequest {
  uint32 fd = 1;
  uint32 length = 2;
}

message ReadResponse {
  oneof result {
    uint32 error_number = 1;
    bytes data = 2 [ctype = CORD];
  }
}

message ReadFileRequest {
  string path = 1;
}

message ReadFileResponse {
  oneof result {
    uint32 error_number = 1;
    bytes data = 2 [ctype = CORD];
  }
}

message WriteRequest {
  uint32 fd = 1;
  bytes data = 2 [ctype = CORD];
}

message WriteResponse {
  oneof result {
    uint32 error_number = 1;
    uint32 length = 2;
  }
}

message WriteFileRequest {
  string path = 1;
  bytes content = 2;
}

message WriteFileResponse {
  uint32 error_number = 1;
  uint32 written = 2;
}

message AddressResponse {
  bytes address = 1;
  uint32 length = 2;
}

message RecvmsgResponse {
  message ResultPayload {
    bytes data = 1 [ctype = CORD];
    AddressResponse address = 2;
    uint32 length = 3;
    bytes cmsg_data = 4;
  }
  oneof result {
    uint32 error_number = 1;
    ResultPayload payload = 2;
  }
}

message BindRequest {
  uint32 fd = 1;
  bytes address = 2;
}

message BindResponse {
  uint32 error_number = 1;
}

message AcceptRequest {
  uint32 fd = 1;
  bool peer = 2;
  int64 flags = 3;
}

message AcceptResponse {
  message ResultPayload {
    uint32 fd = 1;
    AddressResponse address = 2;
  }
  oneof result {
    uint32 error_number = 1;
    ResultPayload payload = 2;
  }
}

message ConnectRequest {
  uint32 fd = 1;
  bytes address = 2;
}

message ConnectResponse {
  uint32 error_number = 1;
}

message ListenRequest {
  uint32 fd = 1;
  int64 backlog = 2;
}

message ListenResponse {
  uint32 error_number = 1;
}

message ShutdownRequest {
  uint32 fd = 1;
  int64 how = 2;
}

message ShutdownResponse {
  uint32 error_number = 1;
}

message CloseRequest {
  uint32 fd = 1;
}

message CloseResponse {
  uint32 error_number = 1;
}

message GetSockOptRequest {
  uint32 fd = 1;
  int64 level = 2;
  int64 name = 3;
  uint32 length = 4;
}

message GetSockOptResponse {
  oneof result {
    uint32 error_number = 1;
    bytes opt = 2;
  }
}

message SetSockOptRequest {
  uint32 fd = 1;
  int64 level = 2;
  int64 name = 3;
  bytes opt = 4;
}

message SetSockOptResponse {
  uint32 error_number = 1;
}

message GetSockNameRequest {
  uint32 fd = 1;
}

message GetSockNameResponse {
  oneof result {
    uint32 error_number = 1;
    AddressResponse address = 2;
  }
}

message GetPeerNameRequest {
  uint32 fd = 1;
}

message GetPeerNameResponse {
  oneof result {
    uint32 error_number = 1;
    AddressResponse address = 2;
  }
}

message SocketRequest {
  int64 family = 1;
  int64 type = 2;
  int64 protocol = 3;
}

message SocketResponse {
  oneof result {
    uint32 error_number = 1;
    uint32 fd = 2;
  }
}

message EpollWaitRequest {
  uint32 fd = 1;
  uint32 num_events = 2;
  sint64 msec = 3;
}

message EpollEvent {
  uint32 fd = 1;
  uint32 events = 2;
}

message EpollEvents {
  repeated EpollEvent events = 1;
}

message EpollWaitResponse {
  oneof result {
    uint32 error_number = 1;
    EpollEvents events = 2;
  }
}

message EpollCtlRequest {
  uint32 epfd = 1;
  int64 op = 2;
  uint32 fd = 3;
  EpollEvent event = 4;
}

message EpollCtlResponse {
  uint32 error_number = 1;
}

message EpollCreate1Request {
  int64 flag = 1;
}

message EpollCreate1Response {
  oneof result {
    uint32 error_number = 1;
    uint32 fd = 2;
  }
}

message PollRequest {
  uint32 fd = 1;
  uint32 events = 2;
}

message PollResponse {
  oneof result {
    uint32 error_number = 1;
    uint32 events = 2;
  }
}

message SyscallRequest {
  oneof args {
    SocketRequest socket = 1;
    SendmsgRequest sendmsg = 2;
    RecvmsgRequest recvmsg = 3;
    BindRequest bind = 4;
    AcceptRequest accept = 5;
    ConnectRequest connect = 6;
    ListenRequest listen = 7;
    ShutdownRequest shutdown = 8;
    CloseRequest close = 9;
    GetSockOptRequest get_sock_opt = 10;
    SetSockOptRequest set_sock_opt = 11;
    GetSockNameRequest get_sock_name = 12;
    GetPeerNameRequest get_peer_name = 13;
    EpollWaitRequest epoll_wait = 14;
    EpollCtlRequest epoll_ctl = 15;
    EpollCreate1Request epoll_create1 = 16;
    PollRequest poll = 17;
    ReadRequest read = 18;
    WriteRequest write = 19;
    OpenRequest open = 20;
    IOCtlRequest ioctl = 21;
    WriteFileRequest write_file = 22;
    ReadFileRequest read_file = 23;
  }
}

message SyscallResponse {
  oneof result {
    SocketResponse socket = 1;
    SendmsgResponse sendmsg = 2;
    RecvmsgResponse recvmsg = 3;
    BindResponse bind = 4;
    AcceptResponse accept = 5;
    ConnectResponse connect = 6;
    ListenResponse listen = 7;
    ShutdownResponse shutdown = 8;
    CloseResponse close = 9;
    GetSockOptResponse get_sock_opt = 10;
    SetSockOptResponse set_sock_opt = 11;
    GetSockNameResponse get_sock_name = 12;
    GetPeerNameResponse get_peer_name = 13;
    EpollWaitResponse epoll_wait = 14;
    EpollCtlResponse epoll_ctl = 15;
    EpollCreate1Response epoll_create1 = 16;
    PollResponse poll = 17;
    ReadResponse read = 18;
    WriteResponse write = 19;
    OpenResponse open = 20;
    IOCtlResponse ioctl = 21;
    WriteFileResponse write_file = 22;
    ReadFileResponse read_file = 23;
  }
}