github.com/bugraaydogar/snapd@v0.0.0-20210315170335-8c70bb858939/interfaces/builtin/io_ports_control.go (about)

     1  // -*- Mode: Go; indent-tabs-mode: t -*-
     2  
     3  /*
     4   * Copyright (C) 2016-2017 Canonical Ltd
     5   *
     6   * This program is free software: you can redistribute it and/or modify
     7   * it under the terms of the GNU General Public License version 3 as
     8   * published by the Free Software Foundation.
     9   *
    10   * This program is distributed in the hope that it will be useful,
    11   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    12   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    13   * GNU General Public License for more details.
    14   *
    15   * You should have received a copy of the GNU General Public License
    16   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    17   *
    18   */
    19  
    20  package builtin
    21  
    22  const ioPortsControlSummary = `allows access to all I/O ports`
    23  
    24  const ioPortsControlBaseDeclarationSlots = `
    25    io-ports-control:
    26      allow-installation:
    27        slot-snap-type:
    28          - core
    29      deny-auto-connection: true
    30  `
    31  
    32  const ioPortsControlConnectedPlugAppArmor = `
    33  # Description: Allow write access to all I/O ports.
    34  # See 'man 4 mem' for details.
    35  
    36  capability sys_rawio, # required by iopl
    37  
    38  /dev/port rw,
    39  `
    40  
    41  const ioPortsControlConnectedPlugSecComp = `
    42  # Description: Allow changes to the I/O port permissions and
    43  # privilege level of the calling process.  In addition to granting
    44  # unrestricted I/O port access, running at a higher I/O privilege
    45  # level also allows the process to disable interrupts.  This will
    46  # probably crash the system, and is not recommended.
    47  ioperm
    48  iopl
    49  `
    50  
    51  var ioPortsControlConnectedPlugUDev = []string{`KERNEL=="port"`}
    52  
    53  func init() {
    54  	registerIface(&commonInterface{
    55  		name:                  "io-ports-control",
    56  		summary:               ioPortsControlSummary,
    57  		implicitOnCore:        true,
    58  		implicitOnClassic:     true,
    59  		baseDeclarationSlots:  ioPortsControlBaseDeclarationSlots,
    60  		connectedPlugAppArmor: ioPortsControlConnectedPlugAppArmor,
    61  		connectedPlugSecComp:  ioPortsControlConnectedPlugSecComp,
    62  		connectedPlugUDev:     ioPortsControlConnectedPlugUDev,
    63  	})
    64  }