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#
# Serial device configuration
#
# $Id: Kconfig,v 1.11 2004/03/11 18:08:04 lethal Exp $
#

menu "Serial drivers"

#
# The new 8250/16550 serial drivers
config SERIAL_8250
	tristate "8250/16550 and compatible serial support"
	depends on (BROKEN || !SPARC)
	select SERIAL_CORE
	---help---
	  This selects whether you want to include the driver for the standard
	  serial ports.  The standard answer is Y.  People who might say N
	  here are those that are setting up dedicated Ethernet WWW/FTP
	  servers, or users that have one of the various bus mice instead of a
	  serial mouse and don't intend to use their machine's standard serial
	  port for anything.  (Note that the Cyclades and Stallion multi
	  serial port drivers do not need this driver built in for them to
	  work.)

	  To compile this driver as a module, choose M here: the
	  module will be called 8250.
	  [WARNING: Do not compile this driver as a module if you are using
	  non-standard serial ports, since the configuration information will
	  be lost when the driver is unloaded.  This limitation may be lifted
	  in the future.]

	  BTW1: If you have a mouseman serial mouse which is not recognized by
	  the X window system, try running gpm first.

	  BTW2: If you intend to use a software modem (also called Winmodem)
	  under Linux, forget it.  These modems are crippled and require
	  proprietary drivers which are only available under Windows.

	  Most people will say Y or M here, so that they can use serial mice,
	  modems and similar devices connecting to the standard serial ports.

config SERIAL_8250_CONSOLE
	bool "Console on 8250/16550 and compatible serial port"
	depends on SERIAL_8250=y
	select SERIAL_CORE_CONSOLE
	---help---
	  If you say Y here, it will be possible to use a serial port as the
	  system console (the system console is the device which receives all
	  kernel messages and warnings and which allows logins in single user
	  mode). This could be useful if some terminal or printer is connected
	  to that serial port.

	  Even if you say Y here, the currently visible virtual console
	  (/dev/tty0) will still be used as the system console by default, but
	  you can alter that using a kernel command line option such as
	  "console=ttyS1". (Try "man bootparam" or see the documentation of
	  your boot loader (grub or lilo or loadlin) about how to pass options
	  to the kernel at boot time.)

	  If you don't have a VGA card installed and you say Y here, the
	  kernel will automatically use the first serial line, /dev/ttyS0, as
	  system console.

	  If unsure, say N.

config SERIAL_8250_CS
	tristate "8250/16550 PCMCIA device support"
	depends on PCMCIA && SERIAL_8250
	---help---
	  Say Y here to enable support for 16-bit PCMCIA serial devices,
	  including serial port cards, modems, and the modem functions of
	  multi-function Ethernet/modem cards. (PCMCIA- or PC-cards are
	  credit-card size devices often used with laptops.)

	  To compile this driver as a module, choose M here: the
	  module will be called serial_cs.

	  If unsure, say N.

config SERIAL_8250_NR_UARTS
	int "Maximum number of 8250/16550 serial ports"
	depends on SERIAL_8250
	default "4"
	help
	  Set this to the number of serial ports you want the driver
	  to support.  This includes any ports discovered via ACPI or
	  PCI enumeration and any ports that may be added at run-time
	  via hot-plug, or any ISA multi-port serial cards.

config SERIAL_8250_RUNTIME_UARTS
	int "Number of 8250/16550 serial ports to register at runtime"
	depends on SERIAL_8250
	range 0 SERIAL_8250_NR_UARTS
	default "4"
	help
	  Set this to the maximum number of serial ports you want
	  the kernel to register at boot time.  This can be overriden
	  with the module parameter "nr_uarts", or boot-time parameter
	  8250.nr_uarts

config SERIAL_8250_EXTENDED
	bool "Extended 8250/16550 serial driver options"
	depends on SERIAL_8250
	help
	  If you wish to use any non-standard features of the standard "dumb"
	  driver, say Y here. This includes HUB6 support, shared serial
	  interrupts, special multiport support, support for more than the
	  four COM 1/2/3/4 boards, etc.

	  Note that the answer to this question won't directly affect the
	  kernel: saying N will just cause the configurator to skip all
	  the questions about serial driver options. If unsure, say N.

config SERIAL_8250_MANY_PORTS
	bool "Support more than 4 legacy serial ports"
	depends on SERIAL_8250_EXTENDED && !IA64
	help
	  Say Y here if you have dumb serial boards other than the four
	  standard COM 1/2/3/4 ports. This may happen if you have an AST
	  FourPort, Accent Async, Boca (read the Boca mini-HOWTO, available
	  from <http://www.tldp.org/docs.html#howto>), or other custom
	  serial port hardware which acts similar to standard serial port
	  hardware. If you only use the standard COM 1/2/3/4 ports, you can
	  say N here to save some memory. You can also say Y if you have an
	  "intelligent" multiport card such as Cyclades, Digiboards, etc.

config SERIAL_8250_SHARE_IRQ
	bool "Support for sharing serial interrupts"
	depends on SERIAL_8250_EXTENDED
	help
	  Some serial boards have hardware support which allows multiple dumb
	  serial ports on the same board to share a single IRQ. To enable
	  support for this in the serial driver, say Y here.

config SERIAL_8250_DETECT_IRQ
	bool "Autodetect IRQ on standard ports (unsafe)"
	depends on SERIAL_8250_EXTENDED
	help
	  Say Y here if you want the kernel to try to guess which IRQ
	  to use for your serial port.

	  This is considered unsafe; it is far better to configure the IRQ in
	  a boot script using the setserial command.

	  If unsure, say N.

config SERIAL_8250_RSA
	bool "Support RSA serial ports"
	depends on SERIAL_8250_EXTENDED
	help
	  ::: To be written :::

#
# Multi-port serial cards
#

config SERIAL_8250_FOURPORT
	tristate "Support Fourport cards"
	depends on SERIAL_8250 != n && ISA && SERIAL_8250_MANY_PORTS
	help
	  Say Y here if you have an AST FourPort serial board.

	  To compile this driver as a module, choose M here: the module
	  will be called 8250_fourport.

config SERIAL_8250_ACCENT
	tristate "Support Accent cards"
	depends on SERIAL_8250 != n && ISA && SERIAL_8250_MANY_PORTS
	help
	  Say Y here if you have an Accent Async serial board.

	  To compile this driver as a module, choose M here: the module
	  will be called 8250_accent.


config SERIAL_8250_BOCA
	tristate "Support Boca cards"
	depends on SERIAL_8250 != n && ISA && SERIAL_8250_MANY_PORTS
	help
	  Say Y here if you have a Boca serial board.  Please read the Boca
	  mini-HOWTO, avaialble from <http://www.tldp.org/docs.html#howto>

	  To compile this driver as a module, choose M here: the module
	  will be called 8250_boca.

config SERIAL_8250_HUB6
	tristate "Support Hub6 cards"
	depends on SERIAL_8250 != n && ISA && SERIAL_8250_MANY_PORTS
	help
	  Say Y here if you have a HUB6 serial board.

	  To compile this driver as a module, choose M here: the module
	  will be called 8250_hub6.

config SERIAL_8250_MCA
	tristate "Support 8250-type ports on MCA buses"
	depends on SERIAL_8250 != n && MCA
	help
	  Say Y here if you have a MCA serial ports.

	  To compile this driver as a module, choose M here: the module
	  will be called 8250_mca.

config SERIAL_8250_ACORN
	tristate "Acorn expansion card serial port support"
	depends on ARCH_ACORN && SERIAL_8250
	help
	  If you have an Atomwide Serial card or Serial Port card for an Acorn
	  system, say Y to this option.  The driver can handle 1, 2, or 3 port
	  cards.  If unsure, say N.

config SERIAL_8250_AU1X00
	bool "AU1X00 serial port support"
	depends on SERIAL_8250 != n && SOC_AU1X00
	help
	  If you have an Au1x00 board and want to use the serial port, say Y
	  to this option.  The driver can handle 1 or 2 serial ports.
	  If unsure, say N.

comment "Non-8250 serial port support"

config SERIAL_AMBA_PL010
	tristate "ARM AMBA PL010 serial port support"
	depends on ARM_AMBA && (BROKEN || !ARCH_VERSATILE)
	select SERIAL_CORE
	help
	  This selects the ARM(R) AMBA(R) PrimeCell PL010 UART.  If you have
	  an Integrator/AP or Integrator/PP2 platform, say Y or M here.

	  If unsure, say N.

config SERIAL_AMBA_PL010_CONSOLE
	bool "Support for console on AMBA serial port"
	depends on SERIAL_AMBA_PL010=y
	select SERIAL_CORE_CONSOLE
	---help---
	  Say Y here if you wish to use an AMBA PrimeCell UART as the system
	  console (the system console is the device which receives all kernel
	  messages and warnings and which allows logins in single user mode).

	  Even if you say Y here, the currently visible framebuffer console
	  (/dev/tty0) will still be used as the system console by default, but
	  you can alter that using a kernel command line option such as
	  "console=ttyAM0". (Try "man bootparam" or see the documentation of
	  your boot loader (lilo or loadlin) about how to pass options to the
	  kernel at boot time.)

config SERIAL_AMBA_PL011
	tristate "ARM AMBA PL011 serial port support"
	depends on ARM_AMBA
	select SERIAL_CORE
	help
	  This selects the ARM(R) AMBA(R) PrimeCell PL011 UART.  If you have
	  an Integrator/PP2, Integrator/CP or Versatile platform, say Y or M
	  here.

	  If unsure, say N.

config SERIAL_AMBA_PL011_CONSOLE
	bool "Support for console on AMBA serial port"
	depends on SERIAL_AMBA_PL011=y
	select SERIAL_CORE_CONSOLE
	---help---
	  Say Y here if you wish to use an AMBA PrimeCell UART as the system
	  console (the system console is the device which receives all kernel
	  messages and warnings and which allows logins in single user mode).

	  Even if you say Y here, the currently visible framebuffer console
	  (/dev/tty0) will still be used as the system console by default, but
	  you can alter that using a kernel command line option such as
	  "console=ttyAM0". (Try "man bootparam" or see the documentation of
	  your boot loader (lilo or loadlin) about how to pass options to the
	  kernel at boot time.)

config SERIAL_AT91
	bool "AT91RM9200 serial port support"
	depends on ARM && ARCH_AT91RM9200
	select SERIAL_CORE
	help
	  This enables the driver for the on-chip UARTs of the AT91RM9200
	  processor.

config SERIAL_AT91_CONSOLE
	bool "Support for console on AT91RM9200 serial port"
	depends on SERIAL_AT91=y
	select SERIAL_CORE_CONSOLE
	help
	  Say Y here if you wish to use a UART on the AT91RM9200 as the system
	  console (the system console is the device which receives all kernel
	  messages and warnings and which allows logins in single user mode).

config SERIAL_AT91_TTYAT
	bool "Install as device ttyAT0-4 instead of ttyS0-4"
	depends on SERIAL_AT91=y
	help
	  Say Y here if you wish to have the five internal AT91RM9200 UARTs
	  appear as /dev/ttyAT0-4 (major 204, minor 154-158) instead of the
	  normal /dev/ttyS0-4 (major 4, minor 64-68). This is necessary if
	  you also want other UARTs, such as external 8250/16C550 compatible
	  UARTs.
	  The ttySn nodes are legally reserved for the 8250 serial driver
	  but are often misused by other serial drivers.

	  To use this, you should create suitable ttyATn device nodes in
	  /dev/, and pass "console=ttyATn" to the kernel.

	  Say Y if you have an external 8250/16C550 UART.  If unsure, say N.

config SERIAL_CLPS711X
	tristate "CLPS711X serial port support"
	depends on ARM && ARCH_CLPS711X
	select SERIAL_CORE
	help
	  ::: To be written :::

config SERIAL_CLPS711X_CONSOLE
	bool "Support for console on CLPS711X serial port"
	depends on SERIAL_CLPS711X=y
	select SERIAL_CORE_CONSOLE
	help
	  Even if you say Y here, the currently visible virtual console
	  (/dev/tty0) will still be used as the system console by default, but
	  you can alter that using a kernel command line option such as
	  "console=ttyCL1". (Try "man bootparam" or see the documentation of
	  your boot loader (lilo or loadlin) about how to pass options to the
	  kernel at boot time.)

config SERIAL_S3C2410
	tristate "Samsung S3C2410 Serial port support"
	depends on ARM && ARCH_S3C2410
	select SERIAL_CORE
	help
	  Support for the on-chip UARTs on the Samsung S3C2410X CPU,
	  providing /dev/ttySAC0, 1 and 2 (note, some machines may not
	  provide all of these ports, depending on how the serial port
	  pins are configured.

config SERIAL_S3C2410_CONSOLE
	bool "Support for console on S3C2410 serial port"
	depends on SERIAL_S3C2410=y
	select SERIAL_CORE_CONSOLE
	help
	  Allow selection of the S3C2410 on-board serial ports for use as
	  an virtual console.

	  Even if you say Y here, the currently visible virtual console
	  (/dev/tty0) will still be used as the system console by default, but
	  you can alter that using a kernel command line option such as
	  "console=ttySACx". (Try "man bootparam" or see the documentation of
	  your boot loader about how to pass options to the kernel at
	  boot time.)

config SERIAL_DZ
	bool "DECstation DZ serial driver"
	depends on MACH_DECSTATION && 32BIT
	select SERIAL_CORE
	help
	  DZ11-family serial controllers for VAXstations, including the
	  DC7085, M7814, and M7819.

config SERIAL_DZ_CONSOLE
	bool "Support console on DECstation DZ serial driver"
	depends on SERIAL_DZ=y
	select SERIAL_CORE_CONSOLE
	help
	  If you say Y here, it will be possible to use a serial port as the
	  system console (the system console is the device which receives all
	  kernel messages and warnings and which allows logins in single user
	  mode).  Note that the firmware uses ttyS0 as the serial console on
	  the Maxine and ttyS2 on the others.

	  If unsure, say Y.

config SERIAL_21285
	tristate "DC21285 serial port support"
	depends on ARM && FOOTBRIDGE
	select SERIAL_CORE
	help
	  If you have a machine based on a 21285 (Footbridge) StrongARM(R)/
	  PCI bridge you can enable its onboard serial port by enabling this
	  option.

config SERIAL_21285_CONSOLE
	bool "Console on DC21285 serial port"
	depends on SERIAL_21285=y
	select SERIAL_CORE_CONSOLE
	help
	  If you have enabled the serial port on the 21285 footbridge you can
	  make it the console by answering Y to this option.

	  Even if you say Y here, the currently visible virtual console
	  (/dev/tty0) will still be used as the system console by default, but
	  you can alter that using a kernel command line option such as
	  "console=ttyFB". (Try "man bootparam" or see the documentation of
	  your boot loader (lilo or loadlin) about how to pass options to the
	  kernel at boot time.)

config SERIAL_MPSC
	bool "Marvell MPSC serial port support"
	depends on PPC32 && MV64X60
	select SERIAL_CORE
	help
	  Say Y here if you want to use the Marvell MPSC serial controller.

config SERIAL_MPSC_CONSOLE
	bool "Support for console on Marvell MPSC serial port"
	depends on SERIAL_MPSC
	select SERIAL_CORE_CONSOLE
	help
	  Say Y here if you want to support a serial console on a Marvell MPSC.

config SERIAL_PXA
	bool "PXA serial port support"
	depends on ARM && ARCH_PXA
	select SERIAL_CORE
	help
	  If you have a machine based on an Intel XScale PXA2xx CPU you
	  can enable its onboard serial ports by enabling this option.

config SERIAL_PXA_CONSOLE
	bool "Console on PXA serial port"
	depends on SERIAL_PXA
	select SERIAL_CORE_CONSOLE
	help
	  If you have enabled the serial port on the Intel XScale PXA
	  CPU you can make it the console by answering Y to this option.

	  Even if you say Y here, the currently visible virtual console
	  (/dev/tty0) will still be used as the system console by default, but
	  you can alter that using a kernel command line option such as
	  "console=ttySA0". (Try "man bootparam" or see the documentation of
	  your boot loader (lilo or loadlin) about how to pass options to the
	  kernel at boot time.)

config SERIAL_SA1100
	bool "SA1100 serial port support"
	depends on ARM && ARCH_SA1100
	select SERIAL_CORE
	help
	  If you have a machine based on a SA1100/SA1110 StrongARM(R) CPU you
	  can enable its onboard serial port by enabling this option.
	  Please read <file:Documentation/arm/SA1100/serial_UART> for further
	  info.

config SERIAL_SA1100_CONSOLE
	bool "Console on SA1100 serial port"
	depends on SERIAL_SA1100
	select SERIAL_CORE_CONSOLE
	help
	  If you have enabled the serial port on the SA1100/SA1110 StrongARM
	  CPU you can make it the console by answering Y to this option.

	  Even if you say Y here, the currently visible virtual console
	  (/dev/tty0) will still be used as the system console by default, but
	  you can alter that using a kernel command line option such as
	  "console=ttySA0". (Try "man bootparam" or see the documentation of
	  your boot loader (lilo or loadlin) about how to pass options to the
	  kernel at boot time.)

config SERIAL_IMX
	bool "IMX serial port support"
	depends on ARM && ARCH_IMX
	select SERIAL_CORE
	help
	  If you have a machine based on a Motorola IMX CPU you
	  can enable its onboard serial port by enabling this option.

config SERIAL_IMX_CONSOLE
	bool "Console on IMX serial port"
	depends on SERIAL_IMX
	select SERIAL_CORE_CONSOLE
	help
	  If you have enabled the serial port on the Motorola IMX
	  CPU you can make it the console by answering Y to this option.

	  Even if you say Y here, the currently visible virtual console
	  (/dev/tty0) will still be used as the system console by default, but
	  you can alter that using a kernel command line option such as
	  "console=ttySA0". (Try "man bootparam" or see the documentation of
	  your boot loader (lilo or loadlin) about how to pass options to the
	  kernel at boot time.)

config SERIAL_SUNCORE
	bool
	depends on SPARC
	select SERIAL_CORE
	select SERIAL_CORE_CONSOLE
	default y

config SERIAL_SUNZILOG
	tristate "Sun Zilog8530 serial support"
	depends on SPARC
	help
	  This driver supports the Zilog8530 serial ports found on many Sparc
	  systems.  Say Y or M if you want to be able to these serial ports.

config SERIAL_SUNZILOG_CONSOLE
	bool "Console on Sun Zilog8530 serial port"
	depends on SERIAL_SUNZILOG=y
	help
	  If you would like to be able to use the Zilog8530 serial port
	  on your Sparc system as the console, you can do so by answering
	  Y to this option.

config SERIAL_SUNSU
	tristate "Sun SU serial support"
	depends on SPARC && PCI
	help
	  This driver supports the 8250 serial ports that run the keyboard and
	  mouse on (PCI) UltraSPARC systems.  Say Y or M if you want to be able
	  to these serial ports.

config SERIAL_SUNSU_CONSOLE
	bool "Console on Sun SU serial port"
	depends on SERIAL_SUNSU=y
	help
	  If you would like to be able to use the SU serial port
	  on your Sparc system as the console, you can do so by answering
	  Y to this option.

config SERIAL_MUX
	tristate "Serial MUX support"
	depends on GSC
	select SERIAL_CORE
	default y
	---help---
	  Saying Y here will enable the hardware MUX serial driver for
	  the Nova and K class systems.  The hardware MUX is not 8250/16550 
	  compatible therefore the /dev/ttyB0 device is shared between the 
	  Serial MUX and the PDC software console.  The following steps 
	  need to be completed to use the Serial MUX:

	    1. create the device entry (mknod /dev/ttyB0 c 11 0)
	    2. Edit the /etc/inittab to start a getty listening on /dev/ttyB0
	    3. Add device ttyB0 to /etc/securetty (if you want to log on as
		 root on this console.)
	    4. Change the kernel command console parameter to: console=ttyB0

config SERIAL_MUX_CONSOLE
        bool "Support for console on serial MUX"
        depends on SERIAL_MUX
	select SERIAL_CORE_CONSOLE
        default y

config PDC_CONSOLE
	bool "PDC software console support"
	depends on PARISC && !SERIAL_MUX && VT
	default n
	help
	  Saying Y here will enable the software based PDC console to be 
	  used as the system console.  This is useful for machines in 
	  which the hardware based console has not been written yet.  The
	  following steps must be competed to use the PDC console:

	    1. create the device entry (mknod /dev/ttyB0 c 11 0)
	    2. Edit the /etc/inittab to start a getty listening on /dev/ttyB0
	    3. Add device ttyB0 to /etc/securetty (if you want to log on as
		 root on this console.)
	    4. Change the kernel command console parameter to: console=ttyB0

config SERIAL_SUNSAB
	tristate "Sun Siemens SAB82532 serial support"
	depends on SPARC && PCI
	help
	  This driver supports the Siemens SAB82532 DUSCC serial ports on newer
	  (PCI) UltraSPARC systems.  Say Y or M if you want to be able to these
	  serial ports.

config SERIAL_SUNSAB_CONSOLE
	bool "Console on Sun Siemens SAB82532 serial port"
	depends on SERIAL_SUNSAB=y
	help
	  If you would like to be able to use the SAB82532 serial port
	  on your Sparc system as the console, you can do so by answering
	  Y to this option.

config SERIAL_SUNHV
	bool "Sun4v Hypervisor Console support"
	depends on SPARC64
	help
	  This driver supports the console device found on SUN4V Sparc
	  systems.  Say Y if you want to be able to use this device.

config SERIAL_IP22_ZILOG
	tristate "IP22 Zilog8530 serial support"
	depends on SGI_IP22
	select SERIAL_CORE
	help
	  This driver supports the Zilog8530 serial ports found on SGI IP22
	  systems.  Say Y or M if you want to be able to these serial ports.

config SERIAL_IP22_ZILOG_CONSOLE
	bool "Console on IP22 Zilog8530 serial port"
	depends on SERIAL_IP22_ZILOG=y
	select SERIAL_CORE_CONSOLE

config V850E_UART
	bool "NEC V850E on-chip UART support"
	depends on V850E_MA1 || V850E_ME2 || V850E_TEG || V850E2_ANNA || V850E_AS85EP1
	select SERIAL_CORE
	default y

config V850E_UARTB
        bool
	depends V850E_UART && V850E_ME2
	default y

config V850E_UART_CONSOLE
	bool "Use NEC V850E on-chip UART for console"
	depends on V850E_UART
	select SERIAL_CORE_CONSOLE

config SERIAL_SH_SCI
	tristate "SH SCI(F) serial port support"
	depends on SUPERH || H8300
	select SERIAL_CORE

config SERIAL_SH_SCI_CONSOLE
	bool "Support for console on SH SCI(F)"
	depends on SERIAL_SH_SCI=y
	select SERIAL_CORE_CONSOLE

config SERIAL_AU1X00
	bool "Enable Au1x00 UART Support"
	depends on MIPS && SOC_AU1X00
	select SERIAL_CORE
	help
	  If you have an Alchemy AU1X00 processor (MIPS based) and you want
	  to use serial ports, say Y.  Otherwise, say N.

config SERIAL_AU1X00_CONSOLE
	bool "Enable Au1x00 serial console"
	depends on SERIAL_AU1X00
	select SERIAL_CORE_CONSOLE
	help
	  If you have an Alchemy AU1X00 processor (MIPS based) and you want
	  to use a console on a serial port, say Y.  Otherwise, say N.

config SERIAL_CORE
	tristate

config SERIAL_CORE_CONSOLE
	bool

config SERIAL_68328
	bool "68328 serial support"
	depends on M68328 || M68EZ328 || M68VZ328
	help
	  This driver supports the built-in serial port of the Motorola 68328
	  (standard, EZ and VZ varities).

config SERIAL_68328_RTS_CTS
	bool "Support RTS/CTS on 68328 serial port"
	depends on SERIAL_68328

config SERIAL_COLDFIRE
	bool "ColdFire serial support"
	depends on COLDFIRE
	help
	  This driver supports the built-in serial ports of the Motorola ColdFire
	  family of CPUs.

config SERIAL_68360_SMC
	bool "68360 SMC uart support"
	depends on M68360
	help
	  This driver supports the SMC serial ports of the Motorola 68360 CPU.

config SERIAL_68360_SCC
	bool "68360 SCC uart support"
	depends on M68360
	help
	  This driver supports the SCC serial ports of the Motorola 68360 CPU.

config SERIAL_68360
	bool
	depends on SERIAL_68360_SMC || SERIAL_68360_SCC
	default y

config SERIAL_PMACZILOG
	tristate "PowerMac z85c30 ESCC support"
	depends on PPC_OF && PPC_PMAC
	select SERIAL_CORE
	help
	  This driver supports the Zilog z85C30 serial ports found on
	  PowerMac machines.
	  Say Y or M if you want to be able to these serial ports.

config SERIAL_PMACZILOG_CONSOLE
	bool "Console on PowerMac z85c30 serial port"
	depends on SERIAL_PMACZILOG=y
	select SERIAL_CORE_CONSOLE
	help
	  If you would like to be able to use the z85c30 serial port
	  on your PowerMac as the console, you can do so by answering
	  Y to this option.

config SERIAL_LH7A40X
	tristate "Sharp LH7A40X embedded UART support"
	depends on ARM && ARCH_LH7A40X
	select SERIAL_CORE
	help
	  This enables support for the three on-board UARTs of the
	  Sharp LH7A40X series CPUs.  Choose Y or M.

config SERIAL_LH7A40X_CONSOLE
	bool "Support for console on Sharp LH7A40X serial port"
	depends on SERIAL_LH7A40X=y
	select SERIAL_CORE_CONSOLE
	help
	  Say Y here if you wish to use one of the serial ports as the
	  system console--the system console is the device which
	  receives all kernel messages and warnings and which allows
	  logins in single user mode.

	  Even if you say Y here, the currently visible framebuffer console
	  (/dev/tty0) will still be used as the default system console, but
	  you can alter that using a kernel command line, for example
	  "console=ttyAM1".

config SERIAL_CPM
	tristate "CPM SCC/SMC serial port support"
	depends on CPM2 || 8xx
	select SERIAL_CORE
	help
	  This driver supports the SCC and SMC serial ports on Motorola 
	  embedded PowerPC that contain a CPM1 (8xx) or CPM2 (8xxx)

config SERIAL_CPM_CONSOLE
	bool "Support for console on CPM SCC/SMC serial port"
	depends on SERIAL_CPM=y
	select SERIAL_CORE_CONSOLE
	help
	  Say Y here if you wish to use a SCC or SMC CPM UART as the system
	  console (the system console is the device which receives all kernel
	  messages and warnings and which allows logins in single user mode).

	  Even if you say Y here, the currently visible framebuffer console
	  (/dev/tty0) will still be used as the system console by default, but
	  you can alter that using a kernel command line option such as
	  "console=ttyCPM0". (Try "man bootparam" or see the documentation of
	  your boot loader (lilo or loadlin) about how to pass options to the
	  kernel at boot time.)

config SERIAL_CPM_SCC1
	bool "Support for SCC1 serial port"
	depends on SERIAL_CPM=y
	help
	  Select the is option to use SCC1 as a serial port

config SERIAL_CPM_SCC2
	bool "Support for SCC2 serial port"
	depends on SERIAL_CPM=y
	help
	  Select the is option to use SCC2 as a serial port

config SERIAL_CPM_SCC3
	bool "Support for SCC3 serial port"
	depends on SERIAL_CPM=y
	help
	  Select the is option to use SCC3 as a serial port

config SERIAL_CPM_SCC4
	bool "Support for SCC4 serial port"
	depends on SERIAL_CPM=y
	help
	  Select the is option to use SCC4 as a serial port

config SERIAL_CPM_SMC1
	bool "Support for SMC1 serial port"
	depends on SERIAL_CPM=y
	help
	  Select the is option to use SMC1 as a serial port

config SERIAL_CPM_SMC2
	bool "Support for SMC2 serial port"
	depends on SERIAL_CPM=y
	help
	  Select the is option to use SMC2 as a serial port

config SERIAL_SGI_L1_CONSOLE
	bool "SGI Altix L1 serial console support"
	depends on IA64_GENERIC || IA64_SGI_SN2
	select SERIAL_CORE
	select SERIAL_CORE_CONSOLE
	help
		If you have an SGI Altix and you would like to use the system
		controller serial port as your console (you want this!),
		say Y.  Otherwise, say N.

config SERIAL_MPC52xx
	tristate "Freescale MPC52xx family PSC serial support"
	depends on PPC_MPC52xx
	select SERIAL_CORE
	help
	  This drivers support the MPC52xx PSC serial ports. If you would
	  like to use them, you must answer Y or M to this option. Not that
	  for use as console, it must be included in kernel and not as a
	  module.

config SERIAL_MPC52xx_CONSOLE
	bool "Console on a Freescale MPC52xx family PSC serial port"
	depends on SERIAL_MPC52xx=y
	select SERIAL_CORE_CONSOLE
	help
	  Select this options if you'd like to use one of the PSC serial port
	  of the Freescale MPC52xx family as a console.

config SERIAL_MPC52xx_CONSOLE_BAUD
	int "Freescale MPC52xx family PSC serial port baud"
	depends on SERIAL_MPC52xx_CONSOLE=y
	default "9600"
	help
	  Select the MPC52xx console baud rate.
	  This value is only used if the bootloader doesn't pass in the
	  console baudrate

config SERIAL_ICOM
	tristate "IBM Multiport Serial Adapter"
	depends on PCI && (PPC_ISERIES || PPC_PSERIES)
	select SERIAL_CORE
	select FW_LOADER
	help
	  This driver is for a family of multiport serial adapters
	  including 2 port RVX, 2 port internal modem, 4 port internal
	  modem and a split 1 port RVX and 1 port internal modem.

	  This driver can also be built as a module.  If so, the module
	  will be called icom.

config SERIAL_M32R_SIO
	bool "M32R SIO I/F"
	depends on M32R
	default y
	select SERIAL_CORE
	help
	  Say Y here if you want to use the M32R serial controller.

config SERIAL_M32R_SIO_CONSOLE
	bool "use SIO console"
	depends on SERIAL_M32R_SIO=y
	select SERIAL_CORE_CONSOLE
	help
	  Say Y here if you want to support a serial console.

	  If you use an M3T-M32700UT or an OPSPUT platform,
	  please say also y for SERIAL_M32R_PLDSIO.

config SERIAL_M32R_PLDSIO
	bool "M32R SIO I/F on a PLD"
	depends on SERIAL_M32R_SIO=y && (PLAT_OPSPUT || PLAT_USRV || PLAT_M32700UT)
	default n
	help
	  Say Y here if you want to use the M32R serial controller
	  on a PLD (Programmable Logic Device).

	  If you use an M3T-M32700UT or an OPSPUT platform,
	  please say Y.

config SERIAL_TXX9
	bool "TMPTX39XX/49XX SIO support"
	depends HAS_TXX9_SERIAL
	select SERIAL_CORE
	default y

config HAS_TXX9_SERIAL
	bool

config SERIAL_TXX9_CONSOLE
	bool "TMPTX39XX/49XX SIO Console support"
	depends on SERIAL_TXX9=y
	select SERIAL_CORE_CONSOLE

config SERIAL_TXX9_STDSERIAL
	bool "TX39XX/49XX SIO act as standard serial"
	depends on !SERIAL_8250 && SERIAL_TXX9

config SERIAL_VR41XX
	tristate "NEC VR4100 series Serial Interface Unit support"
	depends on CPU_VR41XX
	select SERIAL_CORE
	help
	  If you have a NEC VR4100 series processor and you want to use
	  Serial Interface Unit(SIU) or Debug Serial Interface Unit(DSIU)
	  (not include VR4111/VR4121 DSIU), say Y.  Otherwise, say N.

config SERIAL_VR41XX_CONSOLE
	bool "Enable NEC VR4100 series Serial Interface Unit console"
	depends on SERIAL_VR41XX
	select SERIAL_CORE_CONSOLE
	help
	  If you have a NEC VR4100 series processor and you want to use
	  a console on a serial port, say Y.  Otherwise, say N.

config SERIAL_JSM
	tristate "Digi International NEO PCI Support"
	depends on PCI
	select SERIAL_CORE
	help
	  This is a driver for Digi International's Neo series
	  of cards which provide multiple serial ports. You would need
	  something like this to connect more than two modems to your Linux
	  box, for instance in order to become a dial-in server. This driver
	  supports PCI boards only.

	  If you have a card like this, say Y here, otherwise say N.

	  To compile this driver as a module, choose M here: the
	  module will be called jsm.

config SERIAL_SGI_IOC4
	tristate "SGI IOC4 controller serial support"
	depends on (IA64_GENERIC || IA64_SGI_SN2) && SGI_IOC4
	select SERIAL_CORE
	help
		If you have an SGI Altix with an IOC4 based Base IO card
		and wish to use the serial ports on this card, say Y.
		Otherwise, say N.

config SERIAL_SGI_IOC3
	tristate "SGI Altix IOC3 serial support"
	depends on (IA64_GENERIC || IA64_SGI_SN2) && SGI_IOC3
	select SERIAL_CORE
	help
	  If you have an SGI Altix with an IOC3 serial card,
	  say Y or M.  Otherwise, say N.

endmenu
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/*
 *	IPv6 Address [auto]configuration
 *	Linux INET6 implementation
 *
 *	Authors:
 *	Pedro Roque		<roque@di.fc.ul.pt>	
 *	Alexey Kuznetsov	<kuznet@ms2.inr.ac.ru>
 *
 *	$Id: addrconf.c,v 1.69 2001/10/31 21:55:54 davem Exp $
 *
 *	This program is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU General Public License
 *      as published by the Free Software Foundation; either version
 *      2 of the License, or (at your option) any later version.
 */

/*
 *	Changes:
 *
 *	Janos Farkas			:	delete timer on ifdown
 *	<chexum@bankinf.banki.hu>
 *	Andi Kleen			:	kill double kfree on module
 *						unload.
 *	Maciej W. Rozycki		:	FDDI support
 *	sekiya@USAGI			:	Don't send too many RS
 *						packets.
 *	yoshfuji@USAGI			:       Fixed interval between DAD
 *						packets.
 *	YOSHIFUJI Hideaki @USAGI	:	improved accuracy of
 *						address validation timer.
 *	YOSHIFUJI Hideaki @USAGI	:	Privacy Extensions (RFC3041)
 *						support.
 *	Yuji SEKIYA @USAGI		:	Don't assign a same IPv6
 *						address on a same interface.
 *	YOSHIFUJI Hideaki @USAGI	:	ARCnet support
 *	YOSHIFUJI Hideaki @USAGI	:	convert /proc/net/if_inet6 to
 *						seq_file.
 *	YOSHIFUJI Hideaki @USAGI	:	improved source address
 *						selection; consider scope,
 *						status etc.
 */

#include <linux/config.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/sockios.h>
#include <linux/sched.h>
#include <linux/net.h>
#include <linux/in6.h>
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <linux/if_arcnet.h>
#include <linux/if_infiniband.h>
#include <linux/route.h>
#include <linux/inetdevice.h>
#include <linux/init.h>
#ifdef CONFIG_SYSCTL
#include <linux/sysctl.h>
#endif
#include <linux/capability.h>
#include <linux/delay.h>
#include <linux/notifier.h>
#include <linux/string.h>

#include <net/sock.h>
#include <net/snmp.h>

#include <net/ipv6.h>
#include <net/protocol.h>
#include <net/ndisc.h>
#include <net/ip6_route.h>
#include <net/addrconf.h>
#include <net/tcp.h>
#include <net/ip.h>
#include <linux/if_tunnel.h>
#include <linux/rtnetlink.h>

#ifdef CONFIG_IPV6_PRIVACY
#include <linux/random.h>
#endif

#include <asm/uaccess.h>

#include <linux/proc_fs.h>
#include <linux/seq_file.h>

/* Set to 3 to get tracing... */
#define ACONF_DEBUG 2

#if ACONF_DEBUG >= 3
#define ADBG(x) printk x
#else
#define ADBG(x)
#endif

#define	INFINITY_LIFE_TIME	0xFFFFFFFF
#define TIME_DELTA(a,b) ((unsigned long)((long)(a) - (long)(b)))

#ifdef CONFIG_SYSCTL
static void addrconf_sysctl_register(struct inet6_dev *idev, struct ipv6_devconf *p);
static void addrconf_sysctl_unregister(struct ipv6_devconf *p);
#endif

#ifdef CONFIG_IPV6_PRIVACY
static int __ipv6_regen_rndid(struct inet6_dev *idev);
static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr); 
static void ipv6_regen_rndid(unsigned long data);

static int desync_factor = MAX_DESYNC_FACTOR * HZ;
#endif

static int ipv6_count_addresses(struct inet6_dev *idev);

/*
 *	Configured unicast address hash table
 */
static struct inet6_ifaddr		*inet6_addr_lst[IN6_ADDR_HSIZE];
static DEFINE_RWLOCK(addrconf_hash_lock);

/* Protects inet6 devices */
DEFINE_RWLOCK(addrconf_lock);

static void addrconf_verify(unsigned long);

static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0);
static DEFINE_SPINLOCK(addrconf_verify_lock);

static void addrconf_join_anycast(struct inet6_ifaddr *ifp);
static void addrconf_leave_anycast(struct inet6_ifaddr *ifp);

static int addrconf_ifdown(struct net_device *dev, int how);

static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags);
static void addrconf_dad_timer(unsigned long data);
static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
static void addrconf_dad_run(struct inet6_dev *idev);
static void addrconf_rs_timer(unsigned long data);
static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);

static void inet6_prefix_notify(int event, struct inet6_dev *idev, 
				struct prefix_info *pinfo);
static int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev);

static struct notifier_block *inet6addr_chain;

struct ipv6_devconf ipv6_devconf = {
	.forwarding		= 0,
	.hop_limit		= IPV6_DEFAULT_HOPLIMIT,
	.mtu6			= IPV6_MIN_MTU,
	.accept_ra		= 1,
	.accept_redirects	= 1,
	.autoconf		= 1,
	.force_mld_version	= 0,
	.dad_transmits		= 1,
	.rtr_solicits		= MAX_RTR_SOLICITATIONS,
	.rtr_solicit_interval	= RTR_SOLICITATION_INTERVAL,
	.rtr_solicit_delay	= MAX_RTR_SOLICITATION_DELAY,
#ifdef CONFIG_IPV6_PRIVACY
	.use_tempaddr 		= 0,
	.temp_valid_lft		= TEMP_VALID_LIFETIME,
	.temp_prefered_lft	= TEMP_PREFERRED_LIFETIME,
	.regen_max_retry	= REGEN_MAX_RETRY,
	.max_desync_factor	= MAX_DESYNC_FACTOR,
#endif
	.max_addresses		= IPV6_MAX_ADDRESSES,
	.accept_ra_defrtr	= 1,
	.accept_ra_pinfo	= 1,
#ifdef CONFIG_IPV6_ROUTER_PREF
	.accept_ra_rtr_pref	= 1,
	.rtr_probe_interval	= 60 * HZ,
#ifdef CONFIG_IPV6_ROUTE_INFO
	.accept_ra_rt_info_max_plen = 0,
#endif
#endif
};

static struct ipv6_devconf ipv6_devconf_dflt = {
	.forwarding		= 0,
	.hop_limit		= IPV6_DEFAULT_HOPLIMIT,
	.mtu6			= IPV6_MIN_MTU,
	.accept_ra		= 1,
	.accept_redirects	= 1,
	.autoconf		= 1,
	.dad_transmits		= 1,
	.rtr_solicits		= MAX_RTR_SOLICITATIONS,
	.rtr_solicit_interval	= RTR_SOLICITATION_INTERVAL,
	.rtr_solicit_delay	= MAX_RTR_SOLICITATION_DELAY,
#ifdef CONFIG_IPV6_PRIVACY
	.use_tempaddr		= 0,
	.temp_valid_lft		= TEMP_VALID_LIFETIME,
	.temp_prefered_lft	= TEMP_PREFERRED_LIFETIME,
	.regen_max_retry	= REGEN_MAX_RETRY,
	.max_desync_factor	= MAX_DESYNC_FACTOR,
#endif
	.max_addresses		= IPV6_MAX_ADDRESSES,
	.accept_ra_defrtr	= 1,
	.accept_ra_pinfo	= 1,
#ifdef CONFIG_IPV6_ROUTER_PREF
	.accept_ra_rtr_pref	= 1,
	.rtr_probe_interval	= 60 * HZ,
#ifdef CONFIG_IPV6_ROUTE_INFO
	.accept_ra_rt_info_max_plen = 0,
#endif
#endif
};

/* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
#if 0
const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
#endif
const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;

#define IPV6_ADDR_SCOPE_TYPE(scope)	((scope) << 16)

static inline unsigned ipv6_addr_scope2type(unsigned scope)
{
	switch(scope) {
	case IPV6_ADDR_SCOPE_NODELOCAL:
		return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_NODELOCAL) |
			IPV6_ADDR_LOOPBACK);
	case IPV6_ADDR_SCOPE_LINKLOCAL:
		return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL) |
			IPV6_ADDR_LINKLOCAL);
	case IPV6_ADDR_SCOPE_SITELOCAL:
		return (IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL) |
			IPV6_ADDR_SITELOCAL);
	}
	return IPV6_ADDR_SCOPE_TYPE(scope);
}

int __ipv6_addr_type(const struct in6_addr *addr)
{
	u32 st;

	st = addr->s6_addr32[0];

	/* Consider all addresses with the first three bits different of
	   000 and 111 as unicasts.
	 */
	if ((st & htonl(0xE0000000)) != htonl(0x00000000) &&
	    (st & htonl(0xE0000000)) != htonl(0xE0000000))
		return (IPV6_ADDR_UNICAST | 
			IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL));

	if ((st & htonl(0xFF000000)) == htonl(0xFF000000)) {
		/* multicast */
		/* addr-select 3.1 */
		return (IPV6_ADDR_MULTICAST |
			ipv6_addr_scope2type(IPV6_ADDR_MC_SCOPE(addr)));
	}

	if ((st & htonl(0xFFC00000)) == htonl(0xFE800000))
		return (IPV6_ADDR_LINKLOCAL | IPV6_ADDR_UNICAST | 
			IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL));		/* addr-select 3.1 */
	if ((st & htonl(0xFFC00000)) == htonl(0xFEC00000))
		return (IPV6_ADDR_SITELOCAL | IPV6_ADDR_UNICAST |
			IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL));		/* addr-select 3.1 */

	if ((addr->s6_addr32[0] | addr->s6_addr32[1]) == 0) {
		if (addr->s6_addr32[2] == 0) {
			if (addr->s6_addr32[3] == 0)
				return IPV6_ADDR_ANY;

			if (addr->s6_addr32[3] == htonl(0x00000001))
				return (IPV6_ADDR_LOOPBACK | IPV6_ADDR_UNICAST |
					IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_LINKLOCAL));	/* addr-select 3.4 */

			return (IPV6_ADDR_COMPATv4 | IPV6_ADDR_UNICAST |
				IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL));	/* addr-select 3.3 */
		}

		if (addr->s6_addr32[2] == htonl(0x0000ffff))
			return (IPV6_ADDR_MAPPED | 
				IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL));	/* addr-select 3.3 */
	}

	return (IPV6_ADDR_RESERVED | 
		IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL));	/* addr-select 3.4 */
}

static void addrconf_del_timer(struct inet6_ifaddr *ifp)
{
	if (del_timer(&ifp->timer))
		__in6_ifa_put(ifp);
}

enum addrconf_timer_t
{
	AC_NONE,
	AC_DAD,
	AC_RS,
};

static void addrconf_mod_timer(struct inet6_ifaddr *ifp,
			       enum addrconf_timer_t what,
			       unsigned long when)
{
	if (!del_timer(&ifp->timer))
		in6_ifa_hold(ifp);

	switch (what) {
	case AC_DAD:
		ifp->timer.function = addrconf_dad_timer;
		break;
	case AC_RS:
		ifp->timer.function = addrconf_rs_timer;
		break;
	default:;
	}
	ifp->timer.expires = jiffies + when;
	add_timer(&ifp->timer);
}

/* Nobody refers to this device, we may destroy it. */

void in6_dev_finish_destroy(struct inet6_dev *idev)
{
	struct net_device *dev = idev->dev;
	BUG_TRAP(idev->addr_list==NULL);
	BUG_TRAP(idev->mc_list==NULL);
#ifdef NET_REFCNT_DEBUG
	printk(KERN_DEBUG "in6_dev_finish_destroy: %s\n", dev ? dev->name : "NIL");
#endif
	dev_put(dev);
	if (!idev->dead) {
		printk("Freeing alive inet6 device %p\n", idev);
		return;
	}
	snmp6_free_dev(idev);
	kfree(idev);
}

static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
{
	struct inet6_dev *ndev;

	ASSERT_RTNL();

	if (dev->mtu < IPV6_MIN_MTU)
		return NULL;

 	ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL);

 	if (ndev == NULL)
 		return NULL;

	rwlock_init(&ndev->lock);
	ndev->dev = dev;
	memcpy(&ndev->cnf, &ipv6_devconf_dflt, sizeof(ndev->cnf));
	ndev->cnf.mtu6 = dev->mtu;
	ndev->cnf.sysctl = NULL;
	ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
	if (ndev->nd_parms == NULL) {
		kfree(ndev);
		return NULL;
	}
	/* We refer to the device */
	dev_hold(dev);

	if (snmp6_alloc_dev(ndev) < 0) {
		ADBG((KERN_WARNING
			"%s(): cannot allocate memory for statistics; dev=%s.\n",
			__FUNCTION__, dev->name));
		neigh_parms_release(&nd_tbl, ndev->nd_parms);
		ndev->dead = 1;
		in6_dev_finish_destroy(ndev);
		return NULL;
	}

	if (snmp6_register_dev(ndev) < 0) {
		ADBG((KERN_WARNING
			"%s(): cannot create /proc/net/dev_snmp6/%s\n",
			__FUNCTION__, dev->name));
		neigh_parms_release(&nd_tbl, ndev->nd_parms);
		ndev->dead = 1;
		in6_dev_finish_destroy(ndev);
		return NULL;
	}

	/* One reference from device.  We must do this before
	 * we invoke __ipv6_regen_rndid().
	 */
	in6_dev_hold(ndev);

#ifdef CONFIG_IPV6_PRIVACY
	init_timer(&ndev->regen_timer);
	ndev->regen_timer.function = ipv6_regen_rndid;
	ndev->regen_timer.data = (unsigned long) ndev;
	if ((dev->flags&IFF_LOOPBACK) ||
	    dev->type == ARPHRD_TUNNEL ||
	    dev->type == ARPHRD_NONE ||
	    dev->type == ARPHRD_SIT) {
		printk(KERN_INFO
		       "%s: Disabled Privacy Extensions\n",
		       dev->name);
		ndev->cnf.use_tempaddr = -1;
	} else {
		in6_dev_hold(ndev);
		ipv6_regen_rndid((unsigned long) ndev);
	}
#endif

	if (netif_carrier_ok(dev))
		ndev->if_flags |= IF_READY;

	write_lock_bh(&addrconf_lock);
	dev->ip6_ptr = ndev;
	write_unlock_bh(&addrconf_lock);

	ipv6_mc_init_dev(ndev);
	ndev->tstamp = jiffies;
#ifdef CONFIG_SYSCTL
	neigh_sysctl_register(dev, ndev->nd_parms, NET_IPV6,
			      NET_IPV6_NEIGH, "ipv6",
			      &ndisc_ifinfo_sysctl_change,
			      NULL);
	addrconf_sysctl_register(ndev, &ndev->cnf);
#endif
	return ndev;
}

static struct inet6_dev * ipv6_find_idev(struct net_device *dev)
{
	struct inet6_dev *idev;

	ASSERT_RTNL();

	if ((idev = __in6_dev_get(dev)) == NULL) {
		if ((idev = ipv6_add_dev(dev)) == NULL)
			return NULL;
	}

	if (dev->flags&IFF_UP)
		ipv6_mc_up(idev);
	return idev;
}

#ifdef CONFIG_SYSCTL
static void dev_forward_change(struct inet6_dev *idev)
{
	struct net_device *dev;
	struct inet6_ifaddr *ifa;
	struct in6_addr addr;

	if (!idev)
		return;
	dev = idev->dev;
	if (dev && (dev->flags & IFF_MULTICAST)) {
		ipv6_addr_all_routers(&addr);
	
		if (idev->cnf.forwarding)
			ipv6_dev_mc_inc(dev, &addr);
		else
			ipv6_dev_mc_dec(dev, &addr);
	}
	for (ifa=idev->addr_list; ifa; ifa=ifa->if_next) {
		if (idev->cnf.forwarding)
			addrconf_join_anycast(ifa);
		else
			addrconf_leave_anycast(ifa);
	}
}


static void addrconf_forward_change(void)
{
	struct net_device *dev;
	struct inet6_dev *idev;

	read_lock(&dev_base_lock);
	for (dev=dev_base; dev; dev=dev->next) {
		read_lock(&addrconf_lock);
		idev = __in6_dev_get(dev);
		if (idev) {
			int changed = (!idev->cnf.forwarding) ^ (!ipv6_devconf.forwarding);
			idev->cnf.forwarding = ipv6_devconf.forwarding;
			if (changed)
				dev_forward_change(idev);
		}
		read_unlock(&addrconf_lock);
	}
	read_unlock(&dev_base_lock);
}
#endif

/* Nobody refers to this ifaddr, destroy it */

void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
{
	BUG_TRAP(ifp->if_next==NULL);
	BUG_TRAP(ifp->lst_next==NULL);
#ifdef NET_REFCNT_DEBUG
	printk(KERN_DEBUG "inet6_ifa_finish_destroy\n");
#endif

	in6_dev_put(ifp->idev);

	if (del_timer(&ifp->timer))
		printk("Timer is still running, when freeing ifa=%p\n", ifp);

	if (!ifp->dead) {
		printk("Freeing alive inet6 address %p\n", ifp);
		return;
	}
	dst_release(&ifp->rt->u.dst);

	kfree(ifp);
}

/* On success it returns ifp with increased reference count */

static struct inet6_ifaddr *
ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr, int pfxlen,
	      int scope, u32 flags)
{
	struct inet6_ifaddr *ifa = NULL;
	struct rt6_info *rt;
	int hash;
	int err = 0;

	read_lock_bh(&addrconf_lock);
	if (idev->dead) {
		err = -ENODEV;			/*XXX*/
		goto out2;
	}

	write_lock(&addrconf_hash_lock);

	/* Ignore adding duplicate addresses on an interface */
	if (ipv6_chk_same_addr(addr, idev->dev)) {
		ADBG(("ipv6_add_addr: already assigned\n"));
		err = -EEXIST;
		goto out;
	}

	ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);

	if (ifa == NULL) {
		ADBG(("ipv6_add_addr: malloc failed\n"));
		err = -ENOBUFS;
		goto out;
	}

	rt = addrconf_dst_alloc(idev, addr, 0);
	if (IS_ERR(rt)) {
		err = PTR_ERR(rt);
		goto out;
	}

	ipv6_addr_copy(&ifa->addr, addr);

	spin_lock_init(&ifa->lock);
	init_timer(&ifa->timer);
	ifa->timer.data = (unsigned long) ifa;
	ifa->scope = scope;
	ifa->prefix_len = pfxlen;
	ifa->flags = flags | IFA_F_TENTATIVE;
	ifa->cstamp = ifa->tstamp = jiffies;

	ifa->idev = idev;
	in6_dev_hold(idev);
	/* For caller */
	in6_ifa_hold(ifa);

	/* Add to big hash table */
	hash = ipv6_addr_hash(addr);

	ifa->lst_next = inet6_addr_lst[hash];
	inet6_addr_lst[hash] = ifa;
	in6_ifa_hold(ifa);
	write_unlock(&addrconf_hash_lock);

	write_lock(&idev->lock);
	/* Add to inet6_dev unicast addr list. */
	ifa->if_next = idev->addr_list;
	idev->addr_list = ifa;

#ifdef CONFIG_IPV6_PRIVACY
	if (ifa->flags&IFA_F_TEMPORARY) {
		ifa->tmp_next = idev->tempaddr_list;
		idev->tempaddr_list = ifa;
		in6_ifa_hold(ifa);
	}
#endif

	ifa->rt = rt;

	in6_ifa_hold(ifa);
	write_unlock(&idev->lock);
out2:
	read_unlock_bh(&addrconf_lock);

	if (likely(err == 0))
		notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa);
	else {
		kfree(ifa);
		ifa = ERR_PTR(err);
	}

	return ifa;
out:
	write_unlock(&addrconf_hash_lock);
	goto out2;
}

/* This function wants to get referenced ifp and releases it before return */

static void ipv6_del_addr(struct inet6_ifaddr *ifp)
{
	struct inet6_ifaddr *ifa, **ifap;
	struct inet6_dev *idev = ifp->idev;
	int hash;
	int deleted = 0, onlink = 0;
	unsigned long expires = jiffies;

	hash = ipv6_addr_hash(&ifp->addr);

	ifp->dead = 1;

	write_lock_bh(&addrconf_hash_lock);
	for (ifap = &inet6_addr_lst[hash]; (ifa=*ifap) != NULL;
	     ifap = &ifa->lst_next) {
		if (ifa == ifp) {
			*ifap = ifa->lst_next;
			__in6_ifa_put(ifp);
			ifa->lst_next = NULL;
			break;
		}
	}
	write_unlock_bh(&addrconf_hash_lock);

	write_lock_bh(&idev->lock);
#ifdef CONFIG_IPV6_PRIVACY
	if (ifp->flags&IFA_F_TEMPORARY) {
		for (ifap = &idev->tempaddr_list; (ifa=*ifap) != NULL;
		     ifap = &ifa->tmp_next) {
			if (ifa == ifp) {
				*ifap = ifa->tmp_next;
				if (ifp->ifpub) {
					in6_ifa_put(ifp->ifpub);
					ifp->ifpub = NULL;
				}
				__in6_ifa_put(ifp);
				ifa->tmp_next = NULL;
				break;
			}
		}
	}
#endif

	for (ifap = &idev->addr_list; (ifa=*ifap) != NULL;) {
		if (ifa == ifp) {
			*ifap = ifa->if_next;
			__in6_ifa_put(ifp);
			ifa->if_next = NULL;
			if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0)
				break;
			deleted = 1;
			continue;
		} else if (ifp->flags & IFA_F_PERMANENT) {
			if (ipv6_prefix_equal(&ifa->addr, &ifp->addr,
					      ifp->prefix_len)) {
				if (ifa->flags & IFA_F_PERMANENT) {
					onlink = 1;
					if (deleted)
						break;
				} else {
					unsigned long lifetime;

					if (!onlink)
						onlink = -1;

					spin_lock(&ifa->lock);
					lifetime = min_t(unsigned long,
							 ifa->valid_lft, 0x7fffffffUL/HZ);
					if (time_before(expires,
							ifa->tstamp + lifetime * HZ))
						expires = ifa->tstamp + lifetime * HZ;
					spin_unlock(&ifa->lock);
				}
			}
		}
		ifap = &ifa->if_next;
	}
	write_unlock_bh(&idev->lock);

	ipv6_ifa_notify(RTM_DELADDR, ifp);

	notifier_call_chain(&inet6addr_chain,NETDEV_DOWN,ifp);

	addrconf_del_timer(ifp);

	/*
	 * Purge or update corresponding prefix
	 *
	 * 1) we don't purge prefix here if address was not permanent.
	 *    prefix is managed by its own lifetime.
	 * 2) if there're no addresses, delete prefix.
	 * 3) if there're still other permanent address(es),
	 *    corresponding prefix is still permanent.
	 * 4) otherwise, update prefix lifetime to the
	 *    longest valid lifetime among the corresponding
	 *    addresses on the device.
	 *    Note: subsequent RA will update lifetime.
	 *
	 * --yoshfuji
	 */
	if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) {
		struct in6_addr prefix;
		struct rt6_info *rt;

		ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
		rt = rt6_lookup(&prefix, NULL, ifp->idev->dev->ifindex, 1);

		if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
			if (onlink == 0) {
				ip6_del_rt(rt, NULL, NULL, NULL);
				rt = NULL;
			} else if (!(rt->rt6i_flags & RTF_EXPIRES)) {
				rt->rt6i_expires = expires;
				rt->rt6i_flags |= RTF_EXPIRES;
			}
		}
		dst_release(&rt->u.dst);
	}

	in6_ifa_put(ifp);
}

#ifdef CONFIG_IPV6_PRIVACY
static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
{
	struct inet6_dev *idev = ifp->idev;
	struct in6_addr addr, *tmpaddr;
	unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_cstamp, tmp_tstamp;
	int tmp_plen;
	int ret = 0;
	int max_addresses;

	write_lock(&idev->lock);
	if (ift) {
		spin_lock_bh(&ift->lock);
		memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
		spin_unlock_bh(&ift->lock);
		tmpaddr = &addr;
	} else {
		tmpaddr = NULL;
	}
retry:
	in6_dev_hold(idev);
	if (idev->cnf.use_tempaddr <= 0) {
		write_unlock(&idev->lock);
		printk(KERN_INFO
			"ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
		in6_dev_put(idev);
		ret = -1;
		goto out;
	}
	spin_lock_bh(&ifp->lock);
	if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
		idev->cnf.use_tempaddr = -1;	/*XXX*/
		spin_unlock_bh(&ifp->lock);
		write_unlock(&idev->lock);
		printk(KERN_WARNING
			"ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
		in6_dev_put(idev);
		ret = -1;
		goto out;
	}
	in6_ifa_hold(ifp);
	memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
	if (__ipv6_try_regen_rndid(idev, tmpaddr) < 0) {
		spin_unlock_bh(&ifp->lock);
		write_unlock(&idev->lock);
		printk(KERN_WARNING
			"ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
		in6_ifa_put(ifp);
		in6_dev_put(idev);
		ret = -1;
		goto out;
	}
	memcpy(&addr.s6_addr[8], idev->rndid, 8);
	tmp_valid_lft = min_t(__u32,
			      ifp->valid_lft,
			      idev->cnf.temp_valid_lft);
	tmp_prefered_lft = min_t(__u32, 
				 ifp->prefered_lft, 
				 idev->cnf.temp_prefered_lft - desync_factor / HZ);
	tmp_plen = ifp->prefix_len;
	max_addresses = idev->cnf.max_addresses;
	tmp_cstamp = ifp->cstamp;
	tmp_tstamp = ifp->tstamp;
	spin_unlock_bh(&ifp->lock);

	write_unlock(&idev->lock);
	ift = !max_addresses ||
	      ipv6_count_addresses(idev) < max_addresses ? 
		ipv6_add_addr(idev, &addr, tmp_plen,
			      ipv6_addr_type(&addr)&IPV6_ADDR_SCOPE_MASK, IFA_F_TEMPORARY) : NULL;
	if (!ift || IS_ERR(ift)) {
		in6_ifa_put(ifp);
		in6_dev_put(idev);
		printk(KERN_INFO
			"ipv6_create_tempaddr(): retry temporary address regeneration.\n");
		tmpaddr = &addr;
		write_lock(&idev->lock);
		goto retry;
	}

	spin_lock_bh(&ift->lock);
	ift->ifpub = ifp;
	ift->valid_lft = tmp_valid_lft;
	ift->prefered_lft = tmp_prefered_lft;
	ift->cstamp = tmp_cstamp;
	ift->tstamp = tmp_tstamp;
	spin_unlock_bh(&ift->lock);

	addrconf_dad_start(ift, 0);
	in6_ifa_put(ift);
	in6_dev_put(idev);
out:
	return ret;
}
#endif

/*
 *	Choose an appropriate source address (RFC3484)
 */
struct ipv6_saddr_score {
	int		addr_type;
	unsigned int	attrs;
	int		matchlen;
	int		scope;
	unsigned int	rule;
};

#define IPV6_SADDR_SCORE_LOCAL		0x0001
#define IPV6_SADDR_SCORE_PREFERRED	0x0004
#define IPV6_SADDR_SCORE_HOA		0x0008
#define IPV6_SADDR_SCORE_OIF		0x0010
#define IPV6_SADDR_SCORE_LABEL		0x0020
#define IPV6_SADDR_SCORE_PRIVACY	0x0040

static int inline ipv6_saddr_preferred(int type)
{
	if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|
		    IPV6_ADDR_LOOPBACK|IPV6_ADDR_RESERVED))
		return 1;
	return 0;
}

/* static matching label */
static int inline ipv6_saddr_label(const struct in6_addr *addr, int type)
{
 /*
  * 	prefix (longest match)	label
  * 	-----------------------------
  * 	::1/128			0
  * 	::/0			1
  * 	2002::/16		2
  * 	::/96			3
  * 	::ffff:0:0/96		4
  */
	if (type & IPV6_ADDR_LOOPBACK)
		return 0;
	else if (type & IPV6_ADDR_COMPATv4)
		return 3;
	else if (type & IPV6_ADDR_MAPPED)
		return 4;
	else if (addr->s6_addr16[0] == htons(0x2002))
		return 2;
	return 1;
}

int ipv6_dev_get_saddr(struct net_device *daddr_dev,
		       struct in6_addr *daddr, struct in6_addr *saddr)
{
	struct ipv6_saddr_score hiscore;
	struct inet6_ifaddr *ifa_result = NULL;
	int daddr_type = __ipv6_addr_type(daddr);
	int daddr_scope = __ipv6_addr_src_scope(daddr_type);
	u32 daddr_label = ipv6_saddr_label(daddr, daddr_type);
	struct net_device *dev;

	memset(&hiscore, 0, sizeof(hiscore));

	read_lock(&dev_base_lock);
	read_lock(&addrconf_lock);

	for (dev = dev_base; dev; dev=dev->next) {
		struct inet6_dev *idev;
		struct inet6_ifaddr *ifa;

		/* Rule 0: Candidate Source Address (section 4)
		 *  - multicast and link-local destination address,
		 *    the set of candidate source address MUST only
		 *    include addresses assigned to interfaces
		 *    belonging to the same link as the outgoing
		 *    interface.
		 * (- For site-local destination addresses, the
		 *    set of candidate source addresses MUST only
		 *    include addresses assigned to interfaces
		 *    belonging to the same site as the outgoing
		 *    interface.)
		 */
		if ((daddr_type & IPV6_ADDR_MULTICAST ||
		     daddr_scope <= IPV6_ADDR_SCOPE_LINKLOCAL) &&
		    daddr_dev && dev != daddr_dev)
			continue;

		idev = __in6_dev_get(dev);
		if (!idev)
			continue;

		read_lock_bh(&idev->lock);
		for (ifa = idev->addr_list; ifa; ifa = ifa->if_next) {
			struct ipv6_saddr_score score;

			score.addr_type = __ipv6_addr_type(&ifa->addr);

			/* Rule 0:
			 * - Tentative Address (RFC2462 section 5.4)
			 *  - A tentative address is not considered
			 *    "assigned to an interface" in the traditional
			 *    sense.
			 * - Candidate Source Address (section 4)
			 *  - In any case, anycast addresses, multicast
			 *    addresses, and the unspecified address MUST
			 *    NOT be included in a candidate set.
			 */
			if (ifa->flags & IFA_F_TENTATIVE)
				continue;
			if (unlikely(score.addr_type == IPV6_ADDR_ANY ||
				     score.addr_type & IPV6_ADDR_MULTICAST)) {
				LIMIT_NETDEBUG(KERN_DEBUG
					       "ADDRCONF: unspecified / multicast address"
					       "assigned as unicast address on %s",
					       dev->name);
				continue;
			}

			score.attrs = 0;
			score.matchlen = 0;
			score.scope = 0;
			score.rule = 0;

			if (ifa_result == NULL) {
				/* record it if the first available entry */
				goto record_it;
			}

			/* Rule 1: Prefer same address */
			if (hiscore.rule < 1) {
				if (ipv6_addr_equal(&ifa_result->addr, daddr))
					hiscore.attrs |= IPV6_SADDR_SCORE_LOCAL;
				hiscore.rule++;
			}
			if (ipv6_addr_equal(&ifa->addr, daddr)) {
				score.attrs |= IPV6_SADDR_SCORE_LOCAL;
				if (!(hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)) {
					score.rule = 1;
					goto record_it;
				}
			} else {
				if (hiscore.attrs & IPV6_SADDR_SCORE_LOCAL)
					continue;
			}

			/* Rule 2: Prefer appropriate scope */
			if (hiscore.rule < 2) {
				hiscore.scope = __ipv6_addr_src_scope(hiscore.addr_type);
				hiscore.rule++;
			}
			score.scope = __ipv6_addr_src_scope(score.addr_type);
			if (hiscore.scope < score.scope) {
				if (hiscore.scope < daddr_scope) {
					score.rule = 2;
					goto record_it;
				} else
					continue;
			} else if (score.scope < hiscore.scope) {
				if (score.scope < daddr_scope)
					continue;
				else {
					score.rule = 2;
					goto record_it;
				}
			}

			/* Rule 3: Avoid deprecated address */
			if (hiscore.rule < 3) {
				if (ipv6_saddr_preferred(hiscore.addr_type) ||
				    !(ifa_result->flags & IFA_F_DEPRECATED))
					hiscore.attrs |= IPV6_SADDR_SCORE_PREFERRED;
				hiscore.rule++;
			}
			if (ipv6_saddr_preferred(score.addr_type) ||
			    !(ifa->flags & IFA_F_DEPRECATED)) {
				score.attrs |= IPV6_SADDR_SCORE_PREFERRED;
				if (!(hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)) {
					score.rule = 3;
					goto record_it;
				}
			} else {
				if (hiscore.attrs & IPV6_SADDR_SCORE_PREFERRED)
					continue;
			}

			/* Rule 4: Prefer home address -- not implemented yet */
			if (hiscore.rule < 4)
				hiscore.rule++;

			/* Rule 5: Prefer outgoing interface */
			if (hiscore.rule < 5) {
				if (daddr_dev == NULL ||
				    daddr_dev == ifa_result->idev->dev)
					hiscore.attrs |= IPV6_SADDR_SCORE_OIF;
				hiscore.rule++;
			}
			if (daddr_dev == NULL ||
			    daddr_dev == ifa->idev->dev) {
				score.attrs |= IPV6_SADDR_SCORE_OIF;
				if (!(hiscore.attrs & IPV6_SADDR_SCORE_OIF)) {
					score.rule = 5;
					goto record_it;
				}
			} else {
				if (hiscore.attrs & IPV6_SADDR_SCORE_OIF)
					continue;
			}

			/* Rule 6: Prefer matching label */
			if (hiscore.rule < 6) {
				if (ipv6_saddr_label(&ifa_result->addr, hiscore.addr_type) == daddr_label)
					hiscore.attrs |= IPV6_SADDR_SCORE_LABEL;
				hiscore.rule++;
			}
			if (ipv6_saddr_label(&ifa->addr, score.addr_type) == daddr_label) {
				score.attrs |= IPV6_SADDR_SCORE_LABEL;
				if (!(hiscore.attrs & IPV6_SADDR_SCORE_LABEL)) {
					score.rule = 6;
					goto record_it;
				}
			} else {
				if (hiscore.attrs & IPV6_SADDR_SCORE_LABEL)
					continue;
			}

#ifdef CONFIG_IPV6_PRIVACY
			/* Rule 7: Prefer public address
			 * Note: prefer temprary address if use_tempaddr >= 2
			 */
			if (hiscore.rule < 7) {
				if ((!(ifa_result->flags & IFA_F_TEMPORARY)) ^
				    (ifa_result->idev->cnf.use_tempaddr >= 2))
					hiscore.attrs |= IPV6_SADDR_SCORE_PRIVACY;
				hiscore.rule++;
			}
			if ((!(ifa->flags & IFA_F_TEMPORARY)) ^
			    (ifa->idev->cnf.use_tempaddr >= 2)) {
				score.attrs |= IPV6_SADDR_SCORE_PRIVACY;
				if (!(hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)) {
					score.rule = 7;
					goto record_it;
				}
			} else {
				if (hiscore.attrs & IPV6_SADDR_SCORE_PRIVACY)
					continue;
			}
#endif
			/* Rule 8: Use longest matching prefix */
			if (hiscore.rule < 8) {
				hiscore.matchlen = ipv6_addr_diff(&ifa_result->addr, daddr);
				hiscore.rule++;
			}
			score.matchlen = ipv6_addr_diff(&ifa->addr, daddr);
			if (score.matchlen > hiscore.matchlen) {
				score.rule = 8;
				goto record_it;
			}
#if 0
			else if (score.matchlen < hiscore.matchlen)
				continue;
#endif

			/* Final Rule: choose first available one */
			continue;
record_it:
			if (ifa_result)
				in6_ifa_put(ifa_result);
			in6_ifa_hold(ifa);
			ifa_result = ifa;
			hiscore = score;
		}
		read_unlock_bh(&idev->lock);
	}
	read_unlock(&addrconf_lock);
	read_unlock(&dev_base_lock);

	if (!ifa_result)
		return -EADDRNOTAVAIL;
	
	ipv6_addr_copy(saddr, &ifa_result->addr);
	in6_ifa_put(ifa_result);
	return 0;
}


int ipv6_get_saddr(struct dst_entry *dst,
		   struct in6_addr *daddr, struct in6_addr *saddr)
{
	return ipv6_dev_get_saddr(dst ? ((struct rt6_info *)dst)->rt6i_idev->dev : NULL, daddr, saddr);
}


int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr)
{
	struct inet6_dev *idev;
	int err = -EADDRNOTAVAIL;

	read_lock(&addrconf_lock);
	if ((idev = __in6_dev_get(dev)) != NULL) {
		struct inet6_ifaddr *ifp;

		read_lock_bh(&idev->lock);
		for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
			if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
				ipv6_addr_copy(addr, &ifp->addr);
				err = 0;
				break;
			}
		}
		read_unlock_bh(&idev->lock);
	}
	read_unlock(&addrconf_lock);
	return err;
}

static int ipv6_count_addresses(struct inet6_dev *idev)
{
	int cnt = 0;
	struct inet6_ifaddr *ifp;

	read_lock_bh(&idev->lock);
	for (ifp=idev->addr_list; ifp; ifp=ifp->if_next)
		cnt++;
	read_unlock_bh(&idev->lock);
	return cnt;
}

int ipv6_chk_addr(struct in6_addr *addr, struct net_device *dev, int strict)
{
	struct inet6_ifaddr * ifp;
	u8 hash = ipv6_addr_hash(addr);

	read_lock_bh(&addrconf_hash_lock);
	for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
		if (ipv6_addr_equal(&ifp->addr, addr) &&
		    !(ifp->flags&IFA_F_TENTATIVE)) {
			if (dev == NULL || ifp->idev->dev == dev ||
			    !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))
				break;
		}
	}
	read_unlock_bh(&addrconf_hash_lock);
	return ifp != NULL;
}

static
int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev)
{
	struct inet6_ifaddr * ifp;
	u8 hash = ipv6_addr_hash(addr);

	for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
		if (ipv6_addr_equal(&ifp->addr, addr)) {
			if (dev == NULL || ifp->idev->dev == dev)
				break;
		}
	}
	return ifp != NULL;
}

struct inet6_ifaddr * ipv6_get_ifaddr(struct in6_addr *addr, struct net_device *dev, int strict)
{
	struct inet6_ifaddr * ifp;
	u8 hash = ipv6_addr_hash(addr);

	read_lock_bh(&addrconf_hash_lock);
	for(ifp = inet6_addr_lst[hash]; ifp; ifp=ifp->lst_next) {
		if (ipv6_addr_equal(&ifp->addr, addr)) {
			if (dev == NULL || ifp->idev->dev == dev ||
			    !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
				in6_ifa_hold(ifp);
				break;
			}
		}
	}
	read_unlock_bh(&addrconf_hash_lock);

	return ifp;
}

int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2)
{
	const struct in6_addr *sk_rcv_saddr6 = &inet6_sk(sk)->rcv_saddr;
	const struct in6_addr *sk2_rcv_saddr6 = inet6_rcv_saddr(sk2);
	u32 sk_rcv_saddr = inet_sk(sk)->rcv_saddr;
	u32 sk2_rcv_saddr = inet_rcv_saddr(sk2);
	int sk_ipv6only = ipv6_only_sock(sk);
	int sk2_ipv6only = inet_v6_ipv6only(sk2);
	int addr_type = ipv6_addr_type(sk_rcv_saddr6);
	int addr_type2 = sk2_rcv_saddr6 ? ipv6_addr_type(sk2_rcv_saddr6) : IPV6_ADDR_MAPPED;

	if (!sk2_rcv_saddr && !sk_ipv6only)
		return 1;

	if (addr_type2 == IPV6_ADDR_ANY &&
	    !(sk2_ipv6only && addr_type == IPV6_ADDR_MAPPED))
		return 1;

	if (addr_type == IPV6_ADDR_ANY &&
	    !(sk_ipv6only && addr_type2 == IPV6_ADDR_MAPPED))
		return 1;

	if (sk2_rcv_saddr6 &&
	    ipv6_addr_equal(sk_rcv_saddr6, sk2_rcv_saddr6))
		return 1;

	if (addr_type == IPV6_ADDR_MAPPED &&
	    !sk2_ipv6only &&
	    (!sk2_rcv_saddr || !sk_rcv_saddr || sk_rcv_saddr == sk2_rcv_saddr))
		return 1;

	return 0;
}

/* Gets referenced address, destroys ifaddr */

static void addrconf_dad_stop(struct inet6_ifaddr *ifp)
{
	if (ifp->flags&IFA_F_PERMANENT) {
		spin_lock_bh(&ifp->lock);
		addrconf_del_timer(ifp);
		ifp->flags |= IFA_F_TENTATIVE;
		spin_unlock_bh(&ifp->lock);
		in6_ifa_put(ifp);
#ifdef CONFIG_IPV6_PRIVACY
	} else if (ifp->flags&IFA_F_TEMPORARY) {
		struct inet6_ifaddr *ifpub;
		spin_lock_bh(&ifp->lock);
		ifpub = ifp->ifpub;
		if (ifpub) {
			in6_ifa_hold(ifpub);
			spin_unlock_bh(&ifp->lock);
			ipv6_create_tempaddr(ifpub, ifp);
			in6_ifa_put(ifpub);
		} else {
			spin_unlock_bh(&ifp->lock);
		}
		ipv6_del_addr(ifp);
#endif
	} else
		ipv6_del_addr(ifp);
}

void addrconf_dad_failure(struct inet6_ifaddr *ifp)
{
	if (net_ratelimit())
		printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name);
	addrconf_dad_stop(ifp);
}

/* Join to solicited addr multicast group. */

void addrconf_join_solict(struct net_device *dev, struct in6_addr *addr)
{
	struct in6_addr maddr;

	if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
		return;

	addrconf_addr_solict_mult(addr, &maddr);
	ipv6_dev_mc_inc(dev, &maddr);
}

void addrconf_leave_solict(struct inet6_dev *idev, struct in6_addr *addr)
{
	struct in6_addr maddr;

	if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
		return;

	addrconf_addr_solict_mult(addr, &maddr);
	__ipv6_dev_mc_dec(idev, &maddr);
}

static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
{
	struct in6_addr addr;
	ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
	if (ipv6_addr_any(&addr))
		return;
	ipv6_dev_ac_inc(ifp->idev->dev, &addr);
}

static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
{
	struct in6_addr addr;
	ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
	if (ipv6_addr_any(&addr))
		return;
	__ipv6_dev_ac_dec(ifp->idev, &addr);
}

static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
{
	if (dev->addr_len != ETH_ALEN)
		return -1;
	memcpy(eui, dev->dev_addr, 3);
	memcpy(eui + 5, dev->dev_addr + 3, 3);

	/*
	 * The zSeries OSA network cards can be shared among various
	 * OS instances, but the OSA cards have only one MAC address.
	 * This leads to duplicate address conflicts in conjunction
	 * with IPv6 if more than one instance uses the same card.
	 *
	 * The driver for these cards can deliver a unique 16-bit
	 * identifier for each instance sharing the same card.  It is
	 * placed instead of 0xFFFE in the interface identifier.  The
	 * "u" bit of the interface identifier is not inverted in this
	 * case.  Hence the resulting interface identifier has local
	 * scope according to RFC2373.
	 */
	if (dev->dev_id) {
		eui[3] = (dev->dev_id >> 8) & 0xFF;
		eui[4] = dev->dev_id & 0xFF;
	} else {
		eui[3] = 0xFF;
		eui[4] = 0xFE;
		eui[0] ^= 2;
	}
	return 0;
}

static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
{
	/* XXX: inherit EUI-64 from other interface -- yoshfuji */
	if (dev->addr_len != ARCNET_ALEN)
		return -1;
	memset(eui, 0, 7);
	eui[7] = *(u8*)dev->dev_addr;
	return 0;
}

static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
{
	if (dev->addr_len != INFINIBAND_ALEN)
		return -1;
	memcpy(eui, dev->dev_addr + 12, 8);
	eui[0] |= 2;
	return 0;
}

static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
{
	switch (dev->type) {
	case ARPHRD_ETHER:
	case ARPHRD_FDDI:
	case ARPHRD_IEEE802_TR:
		return addrconf_ifid_eui48(eui, dev);
	case ARPHRD_ARCNET:
		return addrconf_ifid_arcnet(eui, dev);
	case ARPHRD_INFINIBAND:
		return addrconf_ifid_infiniband(eui, dev);
	}
	return -1;
}

static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
{
	int err = -1;
	struct inet6_ifaddr *ifp;

	read_lock_bh(&idev->lock);
	for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
		if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
			memcpy(eui, ifp->addr.s6_addr+8, 8);
			err = 0;
			break;
		}
	}
	read_unlock_bh(&idev->lock);
	return err;
}

#ifdef CONFIG_IPV6_PRIVACY
/* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
static int __ipv6_regen_rndid(struct inet6_dev *idev)
{
regen:
	get_random_bytes(idev->rndid, sizeof(idev->rndid));
	idev->rndid[0] &= ~0x02;

	/*
	 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
	 * check if generated address is not inappropriate
	 *
	 *  - Reserved subnet anycast (RFC 2526)
	 *	11111101 11....11 1xxxxxxx
	 *  - ISATAP (draft-ietf-ngtrans-isatap-13.txt) 5.1
	 *	00-00-5E-FE-xx-xx-xx-xx
	 *  - value 0
	 *  - XXX: already assigned to an address on the device
	 */
	if (idev->rndid[0] == 0xfd && 
	    (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
	    (idev->rndid[7]&0x80))
		goto regen;
	if ((idev->rndid[0]|idev->rndid[1]) == 0) {
		if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
			goto regen;
		if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
			goto regen;
	}

	return 0;
}

static void ipv6_regen_rndid(unsigned long data)
{
	struct inet6_dev *idev = (struct inet6_dev *) data;
	unsigned long expires;

	read_lock_bh(&addrconf_lock);
	write_lock_bh(&idev->lock);

	if (idev->dead)
		goto out;

	if (__ipv6_regen_rndid(idev) < 0)
		goto out;
	
	expires = jiffies +
		idev->cnf.temp_prefered_lft * HZ - 
		idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time - desync_factor;
	if (time_before(expires, jiffies)) {
		printk(KERN_WARNING
			"ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
			idev->dev->name);
		goto out;
	}

	if (!mod_timer(&idev->regen_timer, expires))
		in6_dev_hold(idev);

out:
	write_unlock_bh(&idev->lock);
	read_unlock_bh(&addrconf_lock);
	in6_dev_put(idev);
}

static int __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr) {
	int ret = 0;

	if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
		ret = __ipv6_regen_rndid(idev);
	return ret;
}
#endif

/*
 *	Add prefix route.
 */

static void
addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
		      unsigned long expires, u32 flags)
{
	struct in6_rtmsg rtmsg;

	memset(&rtmsg, 0, sizeof(rtmsg));
	ipv6_addr_copy(&rtmsg.rtmsg_dst, pfx);
	rtmsg.rtmsg_dst_len = plen;
	rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF;
	rtmsg.rtmsg_ifindex = dev->ifindex;
	rtmsg.rtmsg_info = expires;
	rtmsg.rtmsg_flags = RTF_UP|flags;
	rtmsg.rtmsg_type = RTMSG_NEWROUTE;

	/* Prevent useless cloning on PtP SIT.
	   This thing is done here expecting that the whole
	   class of non-broadcast devices need not cloning.
	 */
	if (dev->type == ARPHRD_SIT && (dev->flags&IFF_POINTOPOINT))
		rtmsg.rtmsg_flags |= RTF_NONEXTHOP;

	ip6_route_add(&rtmsg, NULL, NULL, NULL);
}

/* Create "default" multicast route to the interface */

static void addrconf_add_mroute(struct net_device *dev)
{
	struct in6_rtmsg rtmsg;

	memset(&rtmsg, 0, sizeof(rtmsg));
	ipv6_addr_set(&rtmsg.rtmsg_dst,
		      htonl(0xFF000000), 0, 0, 0);
	rtmsg.rtmsg_dst_len = 8;
	rtmsg.rtmsg_metric = IP6_RT_PRIO_ADDRCONF;
	rtmsg.rtmsg_ifindex = dev->ifindex;
	rtmsg.rtmsg_flags = RTF_UP;
	rtmsg.rtmsg_type = RTMSG_NEWROUTE;
	ip6_route_add(&rtmsg, NULL, NULL, NULL);
}

static void sit_route_add(struct net_device *dev)
{
	struct in6_rtmsg rtmsg;

	memset(&rtmsg, 0, sizeof(rtmsg));

	rtmsg.rtmsg_type	= RTMSG_NEWROUTE;
	rtmsg.rtmsg_metric	= IP6_RT_PRIO_ADDRCONF;

	/* prefix length - 96 bits "::d.d.d.d" */
	rtmsg.rtmsg_dst_len	= 96;
	rtmsg.rtmsg_flags	= RTF_UP|RTF_NONEXTHOP;
	rtmsg.rtmsg_ifindex	= dev->ifindex;

	ip6_route_add(&rtmsg, NULL, NULL, NULL);
}

static void addrconf_add_lroute(struct net_device *dev)
{
	struct in6_addr addr;

	ipv6_addr_set(&addr,  htonl(0xFE800000), 0, 0, 0);
	addrconf_prefix_route(&addr, 64, dev, 0, 0);
}

static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
{
	struct inet6_dev *idev;

	ASSERT_RTNL();

	if ((idev = ipv6_find_idev(dev)) == NULL)
		return NULL;

	/* Add default multicast route */
	addrconf_add_mroute(dev);

	/* Add link local route */
	addrconf_add_lroute(dev);
	return idev;
}

void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
{
	struct prefix_info *pinfo;
	__u32 valid_lft;
	__u32 prefered_lft;
	int addr_type;
	unsigned long rt_expires;
	struct inet6_dev *in6_dev;

	pinfo = (struct prefix_info *) opt;
	
	if (len < sizeof(struct prefix_info)) {
		ADBG(("addrconf: prefix option too short\n"));
		return;
	}
	
	/*
	 *	Validation checks ([ADDRCONF], page 19)
	 */

	addr_type = ipv6_addr_type(&pinfo->prefix);

	if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
		return;

	valid_lft = ntohl(pinfo->valid);
	prefered_lft = ntohl(pinfo->prefered);

	if (prefered_lft > valid_lft) {
		if (net_ratelimit())
			printk(KERN_WARNING "addrconf: prefix option has invalid lifetime\n");
		return;
	}

	in6_dev = in6_dev_get(dev);

	if (in6_dev == NULL) {
		if (net_ratelimit())
			printk(KERN_DEBUG "addrconf: device %s not configured\n", dev->name);
		return;
	}

	/*
	 *	Two things going on here:
	 *	1) Add routes for on-link prefixes
	 *	2) Configure prefixes with the auto flag set
	 */

	/* Avoid arithmetic overflow. Really, we could
	   save rt_expires in seconds, likely valid_lft,
	   but it would require division in fib gc, that it
	   not good.
	 */
	if (valid_lft >= 0x7FFFFFFF/HZ)
		rt_expires = 0x7FFFFFFF - (0x7FFFFFFF % HZ);
	else
		rt_expires = valid_lft * HZ;

	/*
	 * We convert this (in jiffies) to clock_t later.
	 * Avoid arithmetic overflow there as well.
	 * Overflow can happen only if HZ < USER_HZ.
	 */
	if (HZ < USER_HZ && rt_expires > 0x7FFFFFFF / USER_HZ)
		rt_expires = 0x7FFFFFFF / USER_HZ;

	if (pinfo->onlink) {
		struct rt6_info *rt;
		rt = rt6_lookup(&pinfo->prefix, NULL, dev->ifindex, 1);

		if (rt && ((rt->rt6i_flags & (RTF_GATEWAY | RTF_DEFAULT)) == 0)) {
			if (rt->rt6i_flags&RTF_EXPIRES) {
				if (valid_lft == 0) {
					ip6_del_rt(rt, NULL, NULL, NULL);
					rt = NULL;
				} else {
					rt->rt6i_expires = jiffies + rt_expires;
				}
			}
		} else if (valid_lft) {
			addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
					      dev, jiffies_to_clock_t(rt_expires), RTF_ADDRCONF|RTF_EXPIRES|RTF_PREFIX_RT);
		}
		if (rt)
			dst_release(&rt->u.dst);
	}

	/* Try to figure out our local address for this prefix */

	if (pinfo->autoconf && in6_dev->cnf.autoconf) {
		struct inet6_ifaddr * ifp;
		struct in6_addr addr;
		int create = 0, update_lft = 0;

		if (pinfo->prefix_len == 64) {
			memcpy(&addr, &pinfo->prefix, 8);
			if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
			    ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
				in6_dev_put(in6_dev);
				return;
			}
			goto ok;
		}
		if (net_ratelimit())
			printk(KERN_DEBUG "IPv6 addrconf: prefix with wrong length %d\n",
			       pinfo->prefix_len);
		in6_dev_put(in6_dev);
		return;

ok:

		ifp = ipv6_get_ifaddr(&addr, dev, 1);

		if (ifp == NULL && valid_lft) {
			int max_addresses = in6_dev->cnf.max_addresses;

			/* Do not allow to create too much of autoconfigured
			 * addresses; this would be too easy way to crash kernel.
			 */
			if (!max_addresses ||
			    ipv6_count_addresses(in6_dev) < max_addresses)
				ifp = ipv6_add_addr(in6_dev, &addr, pinfo->prefix_len,
						    addr_type&IPV6_ADDR_SCOPE_MASK, 0);

			if (!ifp || IS_ERR(ifp)) {
				in6_dev_put(in6_dev);
				return;
			}

			update_lft = create = 1;
			ifp->cstamp = jiffies;
			addrconf_dad_start(ifp, RTF_ADDRCONF|RTF_PREFIX_RT);
		}

		if (ifp) {
			int flags;
			unsigned long now;
#ifdef CONFIG_IPV6_PRIVACY
			struct inet6_ifaddr *ift;
#endif
			u32 stored_lft;

			/* update lifetime (RFC2462 5.5.3 e) */
			spin_lock(&ifp->lock);
			now = jiffies;
			if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
				stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
			else
				stored_lft = 0;
			if (!update_lft && stored_lft) {
				if (valid_lft > MIN_VALID_LIFETIME ||
				    valid_lft > stored_lft)
					update_lft = 1;
				else if (stored_lft <= MIN_VALID_LIFETIME) {
					/* valid_lft <= stored_lft is always true */
					/* XXX: IPsec */
					update_lft = 0;
				} else {
					valid_lft = MIN_VALID_LIFETIME;
					if (valid_lft < prefered_lft)
						prefered_lft = valid_lft;
					update_lft = 1;
				}
			}

			if (update_lft) {
				ifp->valid_lft = valid_lft;
				ifp->prefered_lft = prefered_lft;
				ifp->tstamp = now;
				flags = ifp->flags;
				ifp->flags &= ~IFA_F_DEPRECATED;
				spin_unlock(&ifp->lock);

				if (!(flags&IFA_F_TENTATIVE))
					ipv6_ifa_notify(0, ifp);
			} else
				spin_unlock(&ifp->lock);

#ifdef CONFIG_IPV6_PRIVACY
			read_lock_bh(&in6_dev->lock);
			/* update all temporary addresses in the list */
			for (ift=in6_dev->tempaddr_list; ift; ift=ift->tmp_next) {
				/*
				 * When adjusting the lifetimes of an existing
				 * temporary address, only lower the lifetimes.
				 * Implementations must not increase the
				 * lifetimes of an existing temporary address
				 * when processing a Prefix Information Option.
				 */
				spin_lock(&ift->lock);
				flags = ift->flags;
				if (ift->valid_lft > valid_lft &&
				    ift->valid_lft - valid_lft > (jiffies - ift->tstamp) / HZ)
					ift->valid_lft = valid_lft + (jiffies - ift->tstamp) / HZ;
				if (ift->prefered_lft > prefered_lft &&
				    ift->prefered_lft - prefered_lft > (jiffies - ift->tstamp) / HZ)
					ift->prefered_lft = prefered_lft + (jiffies - ift->tstamp) / HZ;
				spin_unlock(&ift->lock);
				if (!(flags&IFA_F_TENTATIVE))
					ipv6_ifa_notify(0, ift);
			}

			if (create && in6_dev->cnf.use_tempaddr > 0) {
				/*
				 * When a new public address is created as described in [ADDRCONF],
				 * also create a new temporary address.
				 */
				read_unlock_bh(&in6_dev->lock); 
				ipv6_create_tempaddr(ifp, NULL);
			} else {
				read_unlock_bh(&in6_dev->lock);
			}
#endif
			in6_ifa_put(ifp);
			addrconf_verify(0);
		}
	}
	inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
	in6_dev_put(in6_dev);
}

/*
 *	Set destination address.
 *	Special case for SIT interfaces where we create a new "virtual"
 *	device.
 */
int addrconf_set_dstaddr(void __user *arg)
{
	struct in6_ifreq ireq;
	struct net_device *dev;
	int err = -EINVAL;

	rtnl_lock();

	err = -EFAULT;
	if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
		goto err_exit;

	dev = __dev_get_by_index(ireq.ifr6_ifindex);

	err = -ENODEV;
	if (dev == NULL)
		goto err_exit;

	if (dev->type == ARPHRD_SIT) {
		struct ifreq ifr;
		mm_segment_t	oldfs;
		struct ip_tunnel_parm p;

		err = -EADDRNOTAVAIL;
		if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
			goto err_exit;

		memset(&p, 0, sizeof(p));
		p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
		p.iph.saddr = 0;
		p.iph.version = 4;
		p.iph.ihl = 5;
		p.iph.protocol = IPPROTO_IPV6;
		p.iph.ttl = 64;
		ifr.ifr_ifru.ifru_data = (void __user *)&p;

		oldfs = get_fs(); set_fs(KERNEL_DS);
		err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL);
		set_fs(oldfs);

		if (err == 0) {
			err = -ENOBUFS;
			if ((dev = __dev_get_by_name(p.name)) == NULL)
				goto err_exit;
			err = dev_open(dev);
		}
	}

err_exit:
	rtnl_unlock();
	return err;
}

/*
 *	Manual configuration of address on an interface
 */
static int inet6_addr_add(int ifindex, struct in6_addr *pfx, int plen)
{
	struct inet6_ifaddr *ifp;
	struct inet6_dev *idev;
	struct net_device *dev;
	int scope;

	ASSERT_RTNL();
	
	if ((dev = __dev_get_by_index(ifindex)) == NULL)
		return -ENODEV;
	
	if (!(dev->flags&IFF_UP))
		return -ENETDOWN;

	if ((idev = addrconf_add_dev(dev)) == NULL)
		return -ENOBUFS;

	scope = ipv6_addr_scope(pfx);

	ifp = ipv6_add_addr(idev, pfx, plen, scope, IFA_F_PERMANENT);
	if (!IS_ERR(ifp)) {
		addrconf_dad_start(ifp, 0);
		in6_ifa_put(ifp);
		return 0;
	}

	return PTR_ERR(ifp);
}

static int inet6_addr_del(int ifindex, struct in6_addr *pfx, int plen)
{
	struct inet6_ifaddr *ifp;
	struct inet6_dev *idev;
	struct net_device *dev;
	
	if ((dev = __dev_get_by_index(ifindex)) == NULL)
		return -ENODEV;

	if ((idev = __in6_dev_get(dev)) == NULL)
		return -ENXIO;

	read_lock_bh(&idev->lock);
	for (ifp = idev->addr_list; ifp; ifp=ifp->if_next) {
		if (ifp->prefix_len == plen &&
		    ipv6_addr_equal(pfx, &ifp->addr)) {
			in6_ifa_hold(ifp);
			read_unlock_bh(&idev->lock);
			
			ipv6_del_addr(ifp);

			/* If the last address is deleted administratively,
			   disable IPv6 on this interface.
			 */
			if (idev->addr_list == NULL)
				addrconf_ifdown(idev->dev, 1);
			return 0;
		}
	}
	read_unlock_bh(&idev->lock);
	return -EADDRNOTAVAIL;
}


int addrconf_add_ifaddr(void __user *arg)
{
	struct in6_ifreq ireq;
	int err;
	
	if (!capable(CAP_NET_ADMIN))
		return -EPERM;
	
	if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
		return -EFAULT;

	rtnl_lock();
	err = inet6_addr_add(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen);
	rtnl_unlock();
	return err;
}

int addrconf_del_ifaddr(void __user *arg)
{
	struct in6_ifreq ireq;
	int err;
	
	if (!capable(CAP_NET_ADMIN))
		return -EPERM;

	if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
		return -EFAULT;

	rtnl_lock();
	err = inet6_addr_del(ireq.ifr6_ifindex, &ireq.ifr6_addr, ireq.ifr6_prefixlen);
	rtnl_unlock();
	return err;
}

static void sit_add_v4_addrs(struct inet6_dev *idev)
{
	struct inet6_ifaddr * ifp;
	struct in6_addr addr;
	struct net_device *dev;
	int scope;

	ASSERT_RTNL();

	memset(&addr, 0, sizeof(struct in6_addr));
	memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);

	if (idev->dev->flags&IFF_POINTOPOINT) {
		addr.s6_addr32[0] = htonl(0xfe800000);
		scope = IFA_LINK;
	} else {
		scope = IPV6_ADDR_COMPATv4;
	}

	if (addr.s6_addr32[3]) {
		ifp = ipv6_add_addr(idev, &addr, 128, scope, IFA_F_PERMANENT);
		if (!IS_ERR(ifp)) {
			spin_lock_bh(&ifp->lock);
			ifp->flags &= ~IFA_F_TENTATIVE;
			spin_unlock_bh(&ifp->lock);
			ipv6_ifa_notify(RTM_NEWADDR, ifp);
			in6_ifa_put(ifp);
		}
		return;
	}

        for (dev = dev_base; dev != NULL; dev = dev->next) {
		struct in_device * in_dev = __in_dev_get_rtnl(dev);
		if (in_dev && (dev->flags & IFF_UP)) {
			struct in_ifaddr * ifa;

			int flag = scope;

			for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
				int plen;

				addr.s6_addr32[3] = ifa->ifa_local;

				if (ifa->ifa_scope == RT_SCOPE_LINK)
					continue;
				if (ifa->ifa_scope >= RT_SCOPE_HOST) {
					if (idev->dev->flags&IFF_POINTOPOINT)
						continue;
					flag |= IFA_HOST;
				}
				if (idev->dev->flags&IFF_POINTOPOINT)
					plen = 64;
				else
					plen = 96;

				ifp = ipv6_add_addr(idev, &addr, plen, flag,
						    IFA_F_PERMANENT);
				if (!IS_ERR(ifp)) {
					spin_lock_bh(&ifp->lock);
					ifp->flags &= ~IFA_F_TENTATIVE;
					spin_unlock_bh(&ifp->lock);
					ipv6_ifa_notify(RTM_NEWADDR, ifp);
					in6_ifa_put(ifp);
				}
			}
		}
        }
}

static void init_loopback(struct net_device *dev)
{
	struct inet6_dev  *idev;
	struct inet6_ifaddr * ifp;

	/* ::1 */

	ASSERT_RTNL();

	if ((idev = ipv6_find_idev(dev)) == NULL) {
		printk(KERN_DEBUG "init loopback: add_dev failed\n");
		return;
	}

	ifp = ipv6_add_addr(idev, &in6addr_loopback, 128, IFA_HOST, IFA_F_PERMANENT);
	if (!IS_ERR(ifp)) {
		spin_lock_bh(&ifp->lock);
		ifp->flags &= ~IFA_F_TENTATIVE;
		spin_unlock_bh(&ifp->lock);
		ipv6_ifa_notify(RTM_NEWADDR, ifp);
		in6_ifa_put(ifp);
	}
}

static void addrconf_add_linklocal(struct inet6_dev *idev, struct in6_addr *addr)
{
	struct inet6_ifaddr * ifp;

	ifp = ipv6_add_addr(idev, addr, 64, IFA_LINK, IFA_F_PERMANENT);
	if (!IS_ERR(ifp)) {
		addrconf_dad_start(ifp, 0);
		in6_ifa_put(ifp);
	}
}

static void addrconf_dev_config(struct net_device *dev)
{
	struct in6_addr addr;
	struct inet6_dev    * idev;

	ASSERT_RTNL();

	if ((dev->type != ARPHRD_ETHER) && 
	    (dev->type != ARPHRD_FDDI) &&
	    (dev->type != ARPHRD_IEEE802_TR) &&
	    (dev->type != ARPHRD_ARCNET) &&
	    (dev->type != ARPHRD_INFINIBAND)) {
		/* Alas, we support only Ethernet autoconfiguration. */
		return;
	}

	idev = addrconf_add_dev(dev);
	if (idev == NULL)
		return;

	memset(&addr, 0, sizeof(struct in6_addr));
	addr.s6_addr32[0] = htonl(0xFE800000);

	if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
		addrconf_add_linklocal(idev, &addr);
}

static void addrconf_sit_config(struct net_device *dev)
{
	struct inet6_dev *idev;

	ASSERT_RTNL();

	/* 
	 * Configure the tunnel with one of our IPv4 
	 * addresses... we should configure all of 
	 * our v4 addrs in the tunnel
	 */

	if ((idev = ipv6_find_idev(dev)) == NULL) {
		printk(KERN_DEBUG "init sit: add_dev failed\n");
		return;
	}

	sit_add_v4_addrs(idev);

	if (dev->flags&IFF_POINTOPOINT) {
		addrconf_add_mroute(dev);
		addrconf_add_lroute(dev);
	} else
		sit_route_add(dev);
}

static inline int
ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
{
	struct in6_addr lladdr;

	if (!ipv6_get_lladdr(link_dev, &lladdr)) {
		addrconf_add_linklocal(idev, &lladdr);
		return 0;
	}
	return -1;
}

static void ip6_tnl_add_linklocal(struct inet6_dev *idev)
{
	struct net_device *link_dev;

	/* first try to inherit the link-local address from the link device */
	if (idev->dev->iflink &&
	    (link_dev = __dev_get_by_index(idev->dev->iflink))) {
		if (!ipv6_inherit_linklocal(idev, link_dev))
			return;
	}
	/* then try to inherit it from any device */
	for (link_dev = dev_base; link_dev; link_dev = link_dev->next) {
		if (!ipv6_inherit_linklocal(idev, link_dev))
			return;
	}
	printk(KERN_DEBUG "init ip6-ip6: add_linklocal failed\n");
}

/*
 * Autoconfigure tunnel with a link-local address so routing protocols,
 * DHCPv6, MLD etc. can be run over the virtual link
 */

static void addrconf_ip6_tnl_config(struct net_device *dev)
{
	struct inet6_dev *idev;

	ASSERT_RTNL();

	if ((idev = addrconf_add_dev(dev)) == NULL) {
		printk(KERN_DEBUG "init ip6-ip6: add_dev failed\n");
		return;
	}
	ip6_tnl_add_linklocal(idev);
}

static int addrconf_notify(struct notifier_block *this, unsigned long event, 
			   void * data)
{
	struct net_device *dev = (struct net_device *) data;
	struct inet6_dev *idev = __in6_dev_get(dev);
	int run_pending = 0;

	switch(event) {
	case NETDEV_UP:
	case NETDEV_CHANGE:
		if (event == NETDEV_UP) {
			if (!netif_carrier_ok(dev)) {
				/* device is not ready yet. */
				printk(KERN_INFO
					"ADDRCONF(NETDEV_UP): %s: "
					"link is not ready\n",
					dev->name);
				break;
			}

			if (idev)
				idev->if_flags |= IF_READY;
		} else {
			if (!netif_carrier_ok(dev)) {
				/* device is still not ready. */
				break;
			}

			if (idev) {
				if (idev->if_flags & IF_READY) {
					/* device is already configured. */
					break;
				}
				idev->if_flags |= IF_READY;
			}

			printk(KERN_INFO
					"ADDRCONF(NETDEV_CHANGE): %s: "
					"link becomes ready\n",
					dev->name);

			run_pending = 1;
		}

		switch(dev->type) {
		case ARPHRD_SIT:
			addrconf_sit_config(dev);
			break;
		case ARPHRD_TUNNEL6:
			addrconf_ip6_tnl_config(dev);
			break;
		case ARPHRD_LOOPBACK:
			init_loopback(dev);
			break;

		default:
			addrconf_dev_config(dev);
			break;
		};
		if (idev) {
			if (run_pending)
				addrconf_dad_run(idev);

			/* If the MTU changed during the interface down, when the
			   interface up, the changed MTU must be reflected in the
			   idev as well as routers.
			 */
			if (idev->cnf.mtu6 != dev->mtu && dev->mtu >= IPV6_MIN_MTU) {
				rt6_mtu_change(dev, dev->mtu);
				idev->cnf.mtu6 = dev->mtu;
			}
			idev->tstamp = jiffies;
			inet6_ifinfo_notify(RTM_NEWLINK, idev);
			/* If the changed mtu during down is lower than IPV6_MIN_MTU
			   stop IPv6 on this interface.
			 */
			if (dev->mtu < IPV6_MIN_MTU)
				addrconf_ifdown(dev, event != NETDEV_DOWN);
		}
		break;

	case NETDEV_CHANGEMTU:
		if ( idev && dev->mtu >= IPV6_MIN_MTU) {
			rt6_mtu_change(dev, dev->mtu);
			idev->cnf.mtu6 = dev->mtu;
			break;
		}

		/* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */

	case NETDEV_DOWN:
	case NETDEV_UNREGISTER:
		/*
		 *	Remove all addresses from this interface.
		 */
		addrconf_ifdown(dev, event != NETDEV_DOWN);
		break;

	case NETDEV_CHANGENAME:
#ifdef CONFIG_SYSCTL
		if (idev) {
			addrconf_sysctl_unregister(&idev->cnf);
			neigh_sysctl_unregister(idev->nd_parms);
			neigh_sysctl_register(dev, idev->nd_parms,
					      NET_IPV6, NET_IPV6_NEIGH, "ipv6",
					      &ndisc_ifinfo_sysctl_change,
					      NULL);
			addrconf_sysctl_register(idev, &idev->cnf);
		}
#endif
		break;
	};

	return NOTIFY_OK;
}

/*
 *	addrconf module should be notified of a device going up
 */
static struct notifier_block ipv6_dev_notf = {
	.notifier_call = addrconf_notify,
	.priority = 0
};

static int addrconf_ifdown(struct net_device *dev, int how)
{
	struct inet6_dev *idev;
	struct inet6_ifaddr *ifa, **bifa;
	int i;

	ASSERT_RTNL();

	if (dev == &loopback_dev && how == 1)
		how = 0;

	rt6_ifdown(dev);
	neigh_ifdown(&nd_tbl, dev);

	idev = __in6_dev_get(dev);
	if (idev == NULL)
		return -ENODEV;

	/* Step 1: remove reference to ipv6 device from parent device.
	           Do not dev_put!
	 */
	if (how == 1) {
		write_lock_bh(&addrconf_lock);
		dev->ip6_ptr = NULL;
		idev->dead = 1;
		write_unlock_bh(&addrconf_lock);

		/* Step 1.5: remove snmp6 entry */
		snmp6_unregister_dev(idev);

	}

	/* Step 2: clear hash table */
	for (i=0; i<IN6_ADDR_HSIZE; i++) {
		bifa = &inet6_addr_lst[i];

		write_lock_bh(&addrconf_hash_lock);
		while ((ifa = *bifa) != NULL) {
			if (ifa->idev == idev) {
				*bifa = ifa->lst_next;
				ifa->lst_next = NULL;
				addrconf_del_timer(ifa);
				in6_ifa_put(ifa);
				continue;
			}
			bifa = &ifa->lst_next;
		}
		write_unlock_bh(&addrconf_hash_lock);
	}

	write_lock_bh(&idev->lock);

	/* Step 3: clear flags for stateless addrconf */
	if (how != 1)
		idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);

	/* Step 4: clear address list */
#ifdef CONFIG_IPV6_PRIVACY
	if (how == 1 && del_timer(&idev->regen_timer))
		in6_dev_put(idev);

	/* clear tempaddr list */
	while ((ifa = idev->tempaddr_list) != NULL) {
		idev->tempaddr_list = ifa->tmp_next;
		ifa->tmp_next = NULL;
		ifa->dead = 1;
		write_unlock_bh(&idev->lock);
		spin_lock_bh(&ifa->lock);

		if (ifa->ifpub) {
			in6_ifa_put(ifa->ifpub);
			ifa->ifpub = NULL;
		}
		spin_unlock_bh(&ifa->lock);
		in6_ifa_put(ifa);
		write_lock_bh(&idev->lock);
	}
#endif
	while ((ifa = idev->addr_list) != NULL) {
		idev->addr_list = ifa->if_next;
		ifa->if_next = NULL;
		ifa->dead = 1;
		addrconf_del_timer(ifa);
		write_unlock_bh(&idev->lock);

		__ipv6_ifa_notify(RTM_DELADDR, ifa);
		in6_ifa_put(ifa);

		write_lock_bh(&idev->lock);
	}
	write_unlock_bh(&idev->lock);

	/* Step 5: Discard multicast list */

	if (how == 1)
		ipv6_mc_destroy_dev(idev);
	else
		ipv6_mc_down(idev);

	/* Step 5: netlink notification of this interface */
	idev->tstamp = jiffies;
	inet6_ifinfo_notify(RTM_DELLINK, idev);
	
	/* Shot the device (if unregistered) */

	if (how == 1) {
#ifdef CONFIG_SYSCTL
		addrconf_sysctl_unregister(&idev->cnf);
		neigh_sysctl_unregister(idev->nd_parms);
#endif
		neigh_parms_release(&nd_tbl, idev->nd_parms);
		neigh_ifdown(&nd_tbl, dev);
		in6_dev_put(idev);
	}
	return 0;
}

static void addrconf_rs_timer(unsigned long data)
{
	struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;

	if (ifp->idev->cnf.forwarding)
		goto out;

	if (ifp->idev->if_flags & IF_RA_RCVD) {
		/*
		 *	Announcement received after solicitation
		 *	was sent
		 */
		goto out;
	}

	spin_lock(&ifp->lock);
	if (ifp->probes++ < ifp->idev->cnf.rtr_solicits) {
		struct in6_addr all_routers;

		/* The wait after the last probe can be shorter */
		addrconf_mod_timer(ifp, AC_RS,
				   (ifp->probes == ifp->idev->cnf.rtr_solicits) ?
				   ifp->idev->cnf.rtr_solicit_delay :
				   ifp->idev->cnf.rtr_solicit_interval);
		spin_unlock(&ifp->lock);

		ipv6_addr_all_routers(&all_routers);

		ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);
	} else {
		spin_unlock(&ifp->lock);
		/*
		 * Note: we do not support deprecated "all on-link"
		 * assumption any longer.
		 */
		printk(KERN_DEBUG "%s: no IPv6 routers present\n",
		       ifp->idev->dev->name);
	}

out:
	in6_ifa_put(ifp);
}

/*
 *	Duplicate Address Detection
 */
static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
{
	unsigned long rand_num;
	struct inet6_dev *idev = ifp->idev;

	rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
	ifp->probes = idev->cnf.dad_transmits;
	addrconf_mod_timer(ifp, AC_DAD, rand_num);
}

static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags)
{
	struct inet6_dev *idev = ifp->idev;
	struct net_device *dev = idev->dev;

	addrconf_join_solict(dev, &ifp->addr);

	if (ifp->prefix_len != 128 && (ifp->flags&IFA_F_PERMANENT))
		addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev, 0,
					flags);

	net_srandom(ifp->addr.s6_addr32[3]);

	read_lock_bh(&idev->lock);
	if (ifp->dead)
		goto out;
	spin_lock_bh(&ifp->lock);

	if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
	    !(ifp->flags&IFA_F_TENTATIVE)) {
		ifp->flags &= ~IFA_F_TENTATIVE;
		spin_unlock_bh(&ifp->lock);
		read_unlock_bh(&idev->lock);

		addrconf_dad_completed(ifp);
		return;
	}

	if (!(idev->if_flags & IF_READY)) {
		spin_unlock_bh(&ifp->lock);
		read_unlock_bh(&idev->lock);
		/*
		 * If the defice is not ready:
		 * - keep it tentative if it is a permanent address.
		 * - otherwise, kill it.
		 */
		in6_ifa_hold(ifp);
		addrconf_dad_stop(ifp);
		return;
	}
	addrconf_dad_kick(ifp);
	spin_unlock_bh(&ifp->lock);
out:
	read_unlock_bh(&idev->lock);
}

static void addrconf_dad_timer(unsigned long data)
{
	struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
	struct inet6_dev *idev = ifp->idev;
	struct in6_addr unspec;
	struct in6_addr mcaddr;

	read_lock_bh(&idev->lock);
	if (idev->dead) {
		read_unlock_bh(&idev->lock);
		goto out;
	}
	spin_lock_bh(&ifp->lock);
	if (ifp->probes == 0) {
		/*
		 * DAD was successful
		 */

		ifp->flags &= ~IFA_F_TENTATIVE;
		spin_unlock_bh(&ifp->lock);
		read_unlock_bh(&idev->lock);

		addrconf_dad_completed(ifp);

		goto out;
	}

	ifp->probes--;
	addrconf_mod_timer(ifp, AC_DAD, ifp->idev->nd_parms->retrans_time);
	spin_unlock_bh(&ifp->lock);
	read_unlock_bh(&idev->lock);

	/* send a neighbour solicitation for our addr */
	memset(&unspec, 0, sizeof(unspec));
	addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
	ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &unspec);
out:
	in6_ifa_put(ifp);
}

static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
{
	struct net_device *	dev = ifp->idev->dev;

	/*
	 *	Configure the address for reception. Now it is valid.
	 */

	ipv6_ifa_notify(RTM_NEWADDR, ifp);

	/* If added prefix is link local and forwarding is off,
	   start sending router solicitations.
	 */

	if (ifp->idev->cnf.forwarding == 0 &&
	    ifp->idev->cnf.rtr_solicits > 0 &&
	    (dev->flags&IFF_LOOPBACK) == 0 &&
	    (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
		struct in6_addr all_routers;

		ipv6_addr_all_routers(&all_routers);

		/*
		 *	If a host as already performed a random delay
		 *	[...] as part of DAD [...] there is no need
		 *	to delay again before sending the first RS
		 */
		ndisc_send_rs(ifp->idev->dev, &ifp->addr, &all_routers);

		spin_lock_bh(&ifp->lock);
		ifp->probes = 1;
		ifp->idev->if_flags |= IF_RS_SENT;
		addrconf_mod_timer(ifp, AC_RS, ifp->idev->cnf.rtr_solicit_interval);
		spin_unlock_bh(&ifp->lock);
	}
}

static void addrconf_dad_run(struct inet6_dev *idev) {
	struct inet6_ifaddr *ifp;

	read_lock_bh(&idev->lock);
	for (ifp = idev->addr_list; ifp; ifp = ifp->if_next) {
		spin_lock_bh(&ifp->lock);
		if (!(ifp->flags & IFA_F_TENTATIVE)) {
			spin_unlock_bh(&ifp->lock);
			continue;
		}
		spin_unlock_bh(&ifp->lock);
		addrconf_dad_kick(ifp);
	}
	read_unlock_bh(&idev->lock);
}

#ifdef CONFIG_PROC_FS
struct if6_iter_state {
	int bucket;
};

static struct inet6_ifaddr *if6_get_first(struct seq_file *seq)
{
	struct inet6_ifaddr *ifa = NULL;
	struct if6_iter_state *state = seq->private;

	for (state->bucket = 0; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
		ifa = inet6_addr_lst[state->bucket];
		if (ifa)
			break;
	}
	return ifa;
}

static struct inet6_ifaddr *if6_get_next(struct seq_file *seq, struct inet6_ifaddr *ifa)
{
	struct if6_iter_state *state = seq->private;

	ifa = ifa->lst_next;
try_again:
	if (!ifa && ++state->bucket < IN6_ADDR_HSIZE) {
		ifa = inet6_addr_lst[state->bucket];
		goto try_again;
	}
	return ifa;
}

static struct inet6_ifaddr *if6_get_idx(struct seq_file *seq, loff_t pos)
{
	struct inet6_ifaddr *ifa = if6_get_first(seq);

	if (ifa)
		while(pos && (ifa = if6_get_next(seq, ifa)) != NULL)
			--pos;
	return pos ? NULL : ifa;
}

static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
{
	read_lock_bh(&addrconf_hash_lock);
	return if6_get_idx(seq, *pos);
}

static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
	struct inet6_ifaddr *ifa;

	ifa = if6_get_next(seq, v);
	++*pos;
	return ifa;
}

static void if6_seq_stop(struct seq_file *seq, void *v)
{
	read_unlock_bh(&addrconf_hash_lock);
}

static int if6_seq_show(struct seq_file *seq, void *v)
{
	struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
	seq_printf(seq,
		   NIP6_SEQFMT " %02x %02x %02x %02x %8s\n",
		   NIP6(ifp->addr),
		   ifp->idev->dev->ifindex,
		   ifp->prefix_len,
		   ifp->scope,
		   ifp->flags,
		   ifp->idev->dev->name);
	return 0;
}

static struct seq_operations if6_seq_ops = {
	.start	= if6_seq_start,
	.next	= if6_seq_next,
	.show	= if6_seq_show,
	.stop	= if6_seq_stop,
};

static int if6_seq_open(struct inode *inode, struct file *file)
{
	struct seq_file *seq;
	int rc = -ENOMEM;
	struct if6_iter_state *s = kzalloc(sizeof(*s), GFP_KERNEL);

	if (!s)
		goto out;

	rc = seq_open(file, &if6_seq_ops);
	if (rc)
		goto out_kfree;

	seq = file->private_data;
	seq->private = s;
out:
	return rc;
out_kfree:
	kfree(s);
	goto out;
}

static struct file_operations if6_fops = {
	.owner		= THIS_MODULE,
	.open		= if6_seq_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= seq_release_private,
};

int __init if6_proc_init(void)
{
	if (!proc_net_fops_create("if_inet6", S_IRUGO, &if6_fops))
		return -ENOMEM;
	return 0;
}

void if6_proc_exit(void)
{
	proc_net_remove("if_inet6");
}
#endif	/* CONFIG_PROC_FS */

/*
 *	Periodic address status verification
 */

static void addrconf_verify(unsigned long foo)
{
	struct inet6_ifaddr *ifp;
	unsigned long now, next;
	int i;

	spin_lock_bh(&addrconf_verify_lock);
	now = jiffies;
	next = now + ADDR_CHECK_FREQUENCY;

	del_timer(&addr_chk_timer);

	for (i=0; i < IN6_ADDR_HSIZE; i++) {

restart:
		read_lock(&addrconf_hash_lock);
		for (ifp=inet6_addr_lst[i]; ifp; ifp=ifp->lst_next) {
			unsigned long age;
#ifdef CONFIG_IPV6_PRIVACY
			unsigned long regen_advance;
#endif

			if (ifp->flags & IFA_F_PERMANENT)
				continue;

			spin_lock(&ifp->lock);
			age = (now - ifp->tstamp) / HZ;

#ifdef CONFIG_IPV6_PRIVACY
			regen_advance = ifp->idev->cnf.regen_max_retry * 
					ifp->idev->cnf.dad_transmits * 
					ifp->idev->nd_parms->retrans_time / HZ;
#endif

			if (age >= ifp->valid_lft) {
				spin_unlock(&ifp->lock);
				in6_ifa_hold(ifp);
				read_unlock(&addrconf_hash_lock);
				ipv6_del_addr(ifp);
				goto restart;
			} else if (age >= ifp->prefered_lft) {
				/* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
				int deprecate = 0;

				if (!(ifp->flags&IFA_F_DEPRECATED)) {
					deprecate = 1;
					ifp->flags |= IFA_F_DEPRECATED;
				}

				if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
					next = ifp->tstamp + ifp->valid_lft * HZ;

				spin_unlock(&ifp->lock);

				if (deprecate) {
					in6_ifa_hold(ifp);
					read_unlock(&addrconf_hash_lock);

					ipv6_ifa_notify(0, ifp);
					in6_ifa_put(ifp);
					goto restart;
				}
#ifdef CONFIG_IPV6_PRIVACY
			} else if ((ifp->flags&IFA_F_TEMPORARY) &&
				   !(ifp->flags&IFA_F_TENTATIVE)) {
				if (age >= ifp->prefered_lft - regen_advance) {
					struct inet6_ifaddr *ifpub = ifp->ifpub;
					if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
						next = ifp->tstamp + ifp->prefered_lft * HZ;
					if (!ifp->regen_count && ifpub) {
						ifp->regen_count++;
						in6_ifa_hold(ifp);
						in6_ifa_hold(ifpub);
						spin_unlock(&ifp->lock);
						read_unlock(&addrconf_hash_lock);
						spin_lock(&ifpub->lock);
						ifpub->regen_count = 0;
						spin_unlock(&ifpub->lock);
						ipv6_create_tempaddr(ifpub, ifp);
						in6_ifa_put(ifpub);
						in6_ifa_put(ifp);
						goto restart;
					}
				} else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
					next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
				spin_unlock(&ifp->lock);
#endif
			} else {
				/* ifp->prefered_lft <= ifp->valid_lft */
				if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
					next = ifp->tstamp + ifp->prefered_lft * HZ;
				spin_unlock(&ifp->lock);
			}
		}
		read_unlock(&addrconf_hash_lock);
	}

	addr_chk_timer.expires = time_before(next, jiffies + HZ) ? jiffies + HZ : next;
	add_timer(&addr_chk_timer);
	spin_unlock_bh(&addrconf_verify_lock);
}

static int
inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
{
	struct rtattr **rta = arg;
	struct ifaddrmsg *ifm = NLMSG_DATA(nlh);
	struct in6_addr *pfx;

	pfx = NULL;
	if (rta[IFA_ADDRESS-1]) {
		if (RTA_PAYLOAD(rta[IFA_ADDRESS-1]) < sizeof(*pfx))
			return -EINVAL;
		pfx = RTA_DATA(rta[IFA_ADDRESS-1]);
	}
	if (rta[IFA_LOCAL-1]) {
		if (pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx)))
			return -EINVAL;
		pfx = RTA_DATA(rta[IFA_LOCAL-1]);
	}
	if (pfx == NULL)
		return -EINVAL;

	return inet6_addr_del(ifm->ifa_index, pfx, ifm->ifa_prefixlen);
}

static int
inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
{
	struct rtattr  **rta = arg;
	struct ifaddrmsg *ifm = NLMSG_DATA(nlh);
	struct in6_addr *pfx;

	pfx = NULL;
	if (rta[IFA_ADDRESS-1]) {
		if (RTA_PAYLOAD(rta[IFA_ADDRESS-1]) < sizeof(*pfx))
			return -EINVAL;
		pfx = RTA_DATA(rta[IFA_ADDRESS-1]);
	}
	if (rta[IFA_LOCAL-1]) {
		if (pfx && memcmp(pfx, RTA_DATA(rta[IFA_LOCAL-1]), sizeof(*pfx)))
			return -EINVAL;
		pfx = RTA_DATA(rta[IFA_LOCAL-1]);
	}
	if (pfx == NULL)
		return -EINVAL;

	return inet6_addr_add(ifm->ifa_index, pfx, ifm->ifa_prefixlen);
}

static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
			     u32 pid, u32 seq, int event, unsigned int flags)
{
	struct ifaddrmsg *ifm;
	struct nlmsghdr  *nlh;
	struct ifa_cacheinfo ci;
	unsigned char	 *b = skb->tail;

	nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags);
	ifm = NLMSG_DATA(nlh);
	ifm->ifa_family = AF_INET6;
	ifm->ifa_prefixlen = ifa->prefix_len;
	ifm->ifa_flags = ifa->flags;
	ifm->ifa_scope = RT_SCOPE_UNIVERSE;
	if (ifa->scope&IFA_HOST)
		ifm->ifa_scope = RT_SCOPE_HOST;
	else if (ifa->scope&IFA_LINK)
		ifm->ifa_scope = RT_SCOPE_LINK;
	else if (ifa->scope&IFA_SITE)
		ifm->ifa_scope = RT_SCOPE_SITE;
	ifm->ifa_index = ifa->idev->dev->ifindex;
	RTA_PUT(skb, IFA_ADDRESS, 16, &ifa->addr);
	if (!(ifa->flags&IFA_F_PERMANENT)) {
		ci.ifa_prefered = ifa->prefered_lft;
		ci.ifa_valid = ifa->valid_lft;
		if (ci.ifa_prefered != INFINITY_LIFE_TIME) {
			long tval = (jiffies - ifa->tstamp)/HZ;
			ci.ifa_prefered -= tval;
			if (ci.ifa_valid != INFINITY_LIFE_TIME)
				ci.ifa_valid -= tval;
		}
	} else {
		ci.ifa_prefered = INFINITY_LIFE_TIME;
		ci.ifa_valid = INFINITY_LIFE_TIME;
	}
	ci.cstamp = (__u32)(TIME_DELTA(ifa->cstamp, INITIAL_JIFFIES) / HZ * 100
		    + TIME_DELTA(ifa->cstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
	ci.tstamp = (__u32)(TIME_DELTA(ifa->tstamp, INITIAL_JIFFIES) / HZ * 100
		    + TIME_DELTA(ifa->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
	RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci);
	nlh->nlmsg_len = skb->tail - b;
	return skb->len;

nlmsg_failure:
rtattr_failure:
	skb_trim(skb, b - skb->data);
	return -1;
}

static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
				u32 pid, u32 seq, int event, u16 flags)
{
	struct ifaddrmsg *ifm;
	struct nlmsghdr  *nlh;
	struct ifa_cacheinfo ci;
	unsigned char	 *b = skb->tail;

	nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags);
	ifm = NLMSG_DATA(nlh);
	ifm->ifa_family = AF_INET6;	
	ifm->ifa_prefixlen = 128;
	ifm->ifa_flags = IFA_F_PERMANENT;
	ifm->ifa_scope = RT_SCOPE_UNIVERSE;
	if (ipv6_addr_scope(&ifmca->mca_addr)&IFA_SITE)
		ifm->ifa_scope = RT_SCOPE_SITE;
	ifm->ifa_index = ifmca->idev->dev->ifindex;
	RTA_PUT(skb, IFA_MULTICAST, 16, &ifmca->mca_addr);
	ci.cstamp = (__u32)(TIME_DELTA(ifmca->mca_cstamp, INITIAL_JIFFIES) / HZ
		    * 100 + TIME_DELTA(ifmca->mca_cstamp, INITIAL_JIFFIES) % HZ
		    * 100 / HZ);
	ci.tstamp = (__u32)(TIME_DELTA(ifmca->mca_tstamp, INITIAL_JIFFIES) / HZ
		    * 100 + TIME_DELTA(ifmca->mca_tstamp, INITIAL_JIFFIES) % HZ
		    * 100 / HZ);
	ci.ifa_prefered = INFINITY_LIFE_TIME;
	ci.ifa_valid = INFINITY_LIFE_TIME;
	RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci);
	nlh->nlmsg_len = skb->tail - b;
	return skb->len;

nlmsg_failure:
rtattr_failure:
	skb_trim(skb, b - skb->data);
	return -1;
}

static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
				u32 pid, u32 seq, int event, unsigned int flags)
{
	struct ifaddrmsg *ifm;
	struct nlmsghdr  *nlh;
	struct ifa_cacheinfo ci;
	unsigned char	 *b = skb->tail;

	nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*ifm), flags);
	ifm = NLMSG_DATA(nlh);
	ifm->ifa_family = AF_INET6;	
	ifm->ifa_prefixlen = 128;
	ifm->ifa_flags = IFA_F_PERMANENT;
	ifm->ifa_scope = RT_SCOPE_UNIVERSE;
	if (ipv6_addr_scope(&ifaca->aca_addr)&IFA_SITE)
		ifm->ifa_scope = RT_SCOPE_SITE;
	ifm->ifa_index = ifaca->aca_idev->dev->ifindex;
	RTA_PUT(skb, IFA_ANYCAST, 16, &ifaca->aca_addr);
	ci.cstamp = (__u32)(TIME_DELTA(ifaca->aca_cstamp, INITIAL_JIFFIES) / HZ
		    * 100 + TIME_DELTA(ifaca->aca_cstamp, INITIAL_JIFFIES) % HZ
		    * 100 / HZ);
	ci.tstamp = (__u32)(TIME_DELTA(ifaca->aca_tstamp, INITIAL_JIFFIES) / HZ
		    * 100 + TIME_DELTA(ifaca->aca_tstamp, INITIAL_JIFFIES) % HZ
		    * 100 / HZ);
	ci.ifa_prefered = INFINITY_LIFE_TIME;
	ci.ifa_valid = INFINITY_LIFE_TIME;
	RTA_PUT(skb, IFA_CACHEINFO, sizeof(ci), &ci);
	nlh->nlmsg_len = skb->tail - b;
	return skb->len;

nlmsg_failure:
rtattr_failure:
	skb_trim(skb, b - skb->data);
	return -1;
}

enum addr_type_t
{
	UNICAST_ADDR,
	MULTICAST_ADDR,
	ANYCAST_ADDR,
};

static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
			   enum addr_type_t type)
{
	int idx, ip_idx;
	int s_idx, s_ip_idx;
	int err = 1;
	struct net_device *dev;
	struct inet6_dev *idev = NULL;
	struct inet6_ifaddr *ifa;
	struct ifmcaddr6 *ifmca;
	struct ifacaddr6 *ifaca;

	s_idx = cb->args[0];
	s_ip_idx = ip_idx = cb->args[1];
	read_lock(&dev_base_lock);
	
	for (dev = dev_base, idx = 0; dev; dev = dev->next, idx++) {
		if (idx < s_idx)
			continue;
		if (idx > s_idx)
			s_ip_idx = 0;
		ip_idx = 0;
		if ((idev = in6_dev_get(dev)) == NULL)
			continue;
		read_lock_bh(&idev->lock);
		switch (type) {
		case UNICAST_ADDR:
			/* unicast address incl. temp addr */
			for (ifa = idev->addr_list; ifa;
			     ifa = ifa->if_next, ip_idx++) {
				if (ip_idx < s_ip_idx)
					continue;
				if ((err = inet6_fill_ifaddr(skb, ifa, 
				    NETLINK_CB(cb->skb).pid, 
				    cb->nlh->nlmsg_seq, RTM_NEWADDR,
				    NLM_F_MULTI)) <= 0)
					goto done;
			}
			break;
		case MULTICAST_ADDR:
			/* multicast address */
			for (ifmca = idev->mc_list; ifmca; 
			     ifmca = ifmca->next, ip_idx++) {
				if (ip_idx < s_ip_idx)
					continue;
				if ((err = inet6_fill_ifmcaddr(skb, ifmca, 
				    NETLINK_CB(cb->skb).pid, 
				    cb->nlh->nlmsg_seq, RTM_GETMULTICAST,
				    NLM_F_MULTI)) <= 0)
					goto done;
			}
			break;
		case ANYCAST_ADDR:
			/* anycast address */
			for (ifaca = idev->ac_list; ifaca;
			     ifaca = ifaca->aca_next, ip_idx++) {
				if (ip_idx < s_ip_idx)
					continue;
				if ((err = inet6_fill_ifacaddr(skb, ifaca, 
				    NETLINK_CB(cb->skb).pid, 
				    cb->nlh->nlmsg_seq, RTM_GETANYCAST,
				    NLM_F_MULTI)) <= 0) 
					goto done;
			}
			break;
		default:
			break;
		}
		read_unlock_bh(&idev->lock);
		in6_dev_put(idev);
	}
done:
	if (err <= 0) {
		read_unlock_bh(&idev->lock);
		in6_dev_put(idev);
	}
	read_unlock(&dev_base_lock);
	cb->args[0] = idx;
	cb->args[1] = ip_idx;
	return skb->len;
}

static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
{
	enum addr_type_t type = UNICAST_ADDR;
	return inet6_dump_addr(skb, cb, type);
}

static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
{
	enum addr_type_t type = MULTICAST_ADDR;
	return inet6_dump_addr(skb, cb, type);
}


static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
{
	enum addr_type_t type = ANYCAST_ADDR;
	return inet6_dump_addr(skb, cb, type);
}

static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
{
	struct sk_buff *skb;
	int size = NLMSG_SPACE(sizeof(struct ifaddrmsg)+128);

	skb = alloc_skb(size, GFP_ATOMIC);
	if (!skb) {
		netlink_set_err(rtnl, 0, RTNLGRP_IPV6_IFADDR, ENOBUFS);
		return;
	}
	if (inet6_fill_ifaddr(skb, ifa, current->pid, 0, event, 0) < 0) {
		kfree_skb(skb);
		netlink_set_err(rtnl, 0, RTNLGRP_IPV6_IFADDR, EINVAL);
		return;
	}
	NETLINK_CB(skb).dst_group = RTNLGRP_IPV6_IFADDR;
	netlink_broadcast(rtnl, skb, 0, RTNLGRP_IPV6_IFADDR, GFP_ATOMIC);
}

static void inline ipv6_store_devconf(struct ipv6_devconf *cnf,
				__s32 *array, int bytes)
{
	memset(array, 0, bytes);
	array[DEVCONF_FORWARDING] = cnf->forwarding;
	array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
	array[DEVCONF_MTU6] = cnf->mtu6;
	array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
	array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
	array[DEVCONF_AUTOCONF] = cnf->autoconf;
	array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
	array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
	array[DEVCONF_RTR_SOLICIT_INTERVAL] = cnf->rtr_solicit_interval;
	array[DEVCONF_RTR_SOLICIT_DELAY] = cnf->rtr_solicit_delay;
	array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
#ifdef CONFIG_IPV6_PRIVACY
	array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
	array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
	array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
	array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
	array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
#endif
	array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
	array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
	array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
#ifdef CONFIG_IPV6_ROUTER_PREF
	array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
	array[DEVCONF_RTR_PROBE_INTERVAL] = cnf->rtr_probe_interval;
#ifdef CONFIV_IPV6_ROUTE_INFO
	array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
#endif
#endif
}

static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev, 
			     u32 pid, u32 seq, int event, unsigned int flags)
{
	struct net_device	*dev = idev->dev;
	__s32			*array = NULL;
	struct ifinfomsg	*r;
	struct nlmsghdr 	*nlh;
	unsigned char		*b = skb->tail;
	struct rtattr		*subattr;
	__u32			mtu = dev->mtu;
	struct ifla_cacheinfo	ci;

	nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*r), flags);
	r = NLMSG_DATA(nlh);
	r->ifi_family = AF_INET6;
	r->__ifi_pad = 0;
	r->ifi_type = dev->type;
	r->ifi_index = dev->ifindex;
	r->ifi_flags = dev_get_flags(dev);
	r->ifi_change = 0;

	RTA_PUT(skb, IFLA_IFNAME, strlen(dev->name)+1, dev->name);

	if (dev->addr_len)
		RTA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);

	RTA_PUT(skb, IFLA_MTU, sizeof(mtu), &mtu);
	if (dev->ifindex != dev->iflink)
		RTA_PUT(skb, IFLA_LINK, sizeof(int), &dev->iflink);
			
	subattr = (struct rtattr*)skb->tail;

	RTA_PUT(skb, IFLA_PROTINFO, 0, NULL);

	/* return the device flags */
	RTA_PUT(skb, IFLA_INET6_FLAGS, sizeof(__u32), &idev->if_flags);

	/* return interface cacheinfo */
	ci.max_reasm_len = IPV6_MAXPLEN;
	ci.tstamp = (__u32)(TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) / HZ * 100
		    + TIME_DELTA(idev->tstamp, INITIAL_JIFFIES) % HZ * 100 / HZ);
	ci.reachable_time = idev->nd_parms->reachable_time;
	ci.retrans_time = idev->nd_parms->retrans_time;
	RTA_PUT(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci);
	
	/* return the device sysctl params */
	if ((array = kmalloc(DEVCONF_MAX * sizeof(*array), GFP_ATOMIC)) == NULL)
		goto rtattr_failure;
	ipv6_store_devconf(&idev->cnf, array, DEVCONF_MAX * sizeof(*array));
	RTA_PUT(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(*array), array);

	/* XXX - Statistics/MC not implemented */
	subattr->rta_len = skb->tail - (u8*)subattr;

	nlh->nlmsg_len = skb->tail - b;
	kfree(array);
	return skb->len;

nlmsg_failure:
rtattr_failure:
	kfree(array);
	skb_trim(skb, b - skb->data);
	return -1;
}

static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
{
	int idx, err;
	int s_idx = cb->args[0];
	struct net_device *dev;
	struct inet6_dev *idev;

	read_lock(&dev_base_lock);
	for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) {
		if (idx < s_idx)
			continue;
		if ((idev = in6_dev_get(dev)) == NULL)
			continue;
		err = inet6_fill_ifinfo(skb, idev, NETLINK_CB(cb->skb).pid, 
				cb->nlh->nlmsg_seq, RTM_NEWLINK, NLM_F_MULTI);
		in6_dev_put(idev);
		if (err <= 0)
			break;
	}
	read_unlock(&dev_base_lock);
	cb->args[0] = idx;

	return skb->len;
}

void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
{
	struct sk_buff *skb;
	/* 128 bytes ?? */
	int size = NLMSG_SPACE(sizeof(struct ifinfomsg)+128);
	
	skb = alloc_skb(size, GFP_ATOMIC);
	if (!skb) {
		netlink_set_err(rtnl, 0, RTNLGRP_IPV6_IFINFO, ENOBUFS);
		return;
	}
	if (inet6_fill_ifinfo(skb, idev, current->pid, 0, event, 0) < 0) {
		kfree_skb(skb);
		netlink_set_err(rtnl, 0, RTNLGRP_IPV6_IFINFO, EINVAL);
		return;
	}
	NETLINK_CB(skb).dst_group = RTNLGRP_IPV6_IFINFO;
	netlink_broadcast(rtnl, skb, 0, RTNLGRP_IPV6_IFINFO, GFP_ATOMIC);
}

static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
			struct prefix_info *pinfo, u32 pid, u32 seq, 
			int event, unsigned int flags)
{
	struct prefixmsg	*pmsg;
	struct nlmsghdr 	*nlh;
	unsigned char		*b = skb->tail;
	struct prefix_cacheinfo	ci;

	nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*pmsg), flags);
	pmsg = NLMSG_DATA(nlh);
	pmsg->prefix_family = AF_INET6;
	pmsg->prefix_pad1 = 0;
	pmsg->prefix_pad2 = 0;
	pmsg->prefix_ifindex = idev->dev->ifindex;
	pmsg->prefix_len = pinfo->prefix_len;
	pmsg->prefix_type = pinfo->type;
	pmsg->prefix_pad3 = 0;
	
	pmsg->prefix_flags = 0;
	if (pinfo->onlink)
		pmsg->prefix_flags |= IF_PREFIX_ONLINK;
	if (pinfo->autoconf)
		pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;

	RTA_PUT(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix);

	ci.preferred_time = ntohl(pinfo->prefered);
	ci.valid_time = ntohl(pinfo->valid);
	RTA_PUT(skb, PREFIX_CACHEINFO, sizeof(ci), &ci);

	nlh->nlmsg_len = skb->tail - b;
	return skb->len;

nlmsg_failure:
rtattr_failure:
	skb_trim(skb, b - skb->data);
	return -1;
}

static void inet6_prefix_notify(int event, struct inet6_dev *idev, 
			 struct prefix_info *pinfo)
{
	struct sk_buff *skb;
	int size = NLMSG_SPACE(sizeof(struct prefixmsg)+128);

	skb = alloc_skb(size, GFP_ATOMIC);
	if (!skb) {
		netlink_set_err(rtnl, 0, RTNLGRP_IPV6_PREFIX, ENOBUFS);
		return;
	}
	if (inet6_fill_prefix(skb, idev, pinfo, current->pid, 0, event, 0) < 0) {
		kfree_skb(skb);
		netlink_set_err(rtnl, 0, RTNLGRP_IPV6_PREFIX, EINVAL);
		return;
	}
	NETLINK_CB(skb).dst_group = RTNLGRP_IPV6_PREFIX;
	netlink_broadcast(rtnl, skb, 0, RTNLGRP_IPV6_PREFIX, GFP_ATOMIC);
}

static struct rtnetlink_link inet6_rtnetlink_table[RTM_NR_MSGTYPES] = {
	[RTM_GETLINK - RTM_BASE] = { .dumpit	= inet6_dump_ifinfo, },
	[RTM_NEWADDR - RTM_BASE] = { .doit	= inet6_rtm_newaddr, },
	[RTM_DELADDR - RTM_BASE] = { .doit	= inet6_rtm_deladdr, },
	[RTM_GETADDR - RTM_BASE] = { .dumpit	= inet6_dump_ifaddr, },
	[RTM_GETMULTICAST - RTM_BASE] = { .dumpit = inet6_dump_ifmcaddr, },
	[RTM_GETANYCAST - RTM_BASE] = { .dumpit	= inet6_dump_ifacaddr, },
	[RTM_NEWROUTE - RTM_BASE] = { .doit	= inet6_rtm_newroute, },
	[RTM_DELROUTE - RTM_BASE] = { .doit	= inet6_rtm_delroute, },
	[RTM_GETROUTE - RTM_BASE] = { .doit	= inet6_rtm_getroute,
				      .dumpit	= inet6_dump_fib, },
};

static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
{
	inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);

	switch (event) {
	case RTM_NEWADDR:
		ip6_ins_rt(ifp->rt, NULL, NULL, NULL);
		if (ifp->idev->cnf.forwarding)
			addrconf_join_anycast(ifp);
		break;
	case RTM_DELADDR:
		if (ifp->idev->cnf.forwarding)
			addrconf_leave_anycast(ifp);
		addrconf_leave_solict(ifp->idev, &ifp->addr);
		dst_hold(&ifp->rt->u.dst);
		if (ip6_del_rt(ifp->rt, NULL, NULL, NULL))
			dst_free(&ifp->rt->u.dst);
		break;
	}
}

static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
{
	read_lock_bh(&addrconf_lock);
	if (likely(ifp->idev->dead == 0))
		__ipv6_ifa_notify(event, ifp);
	read_unlock_bh(&addrconf_lock);
}

#ifdef CONFIG_SYSCTL

static
int addrconf_sysctl_forward(ctl_table *ctl, int write, struct file * filp,
			   void __user *buffer, size_t *lenp, loff_t *ppos)
{
	int *valp = ctl->data;
	int val = *valp;
	int ret;

	ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);

	if (write && valp != &ipv6_devconf_dflt.forwarding) {
		if (valp != &ipv6_devconf.forwarding) {
			if ((!*valp) ^ (!val)) {
				struct inet6_dev *idev = (struct inet6_dev *)ctl->extra1;
				if (idev == NULL)
					return ret;
				dev_forward_change(idev);
			}
		} else {
			ipv6_devconf_dflt.forwarding = ipv6_devconf.forwarding;
			addrconf_forward_change();
		}
		if (*valp)
			rt6_purge_dflt_routers();
	}

        return ret;
}

static int addrconf_sysctl_forward_strategy(ctl_table *table, 
					    int __user *name, int nlen,
					    void __user *oldval,
					    size_t __user *oldlenp,
					    void __user *newval, size_t newlen,
					    void **context)
{
	int *valp = table->data;
	int new;

	if (!newval || !newlen)
		return 0;
	if (newlen != sizeof(int))
		return -EINVAL;
	if (get_user(new, (int __user *)newval))
		return -EFAULT;
	if (new == *valp)
		return 0;
	if (oldval && oldlenp) {
		size_t len;
		if (get_user(len, oldlenp))
			return -EFAULT;
		if (len) {
			if (len > table->maxlen)
				len = table->maxlen;
			if (copy_to_user(oldval, valp, len))
				return -EFAULT;
			if (put_user(len, oldlenp))
				return -EFAULT;
		}
	}

	if (valp != &ipv6_devconf_dflt.forwarding) {
		if (valp != &ipv6_devconf.forwarding) {
			struct inet6_dev *idev = (struct inet6_dev *)table->extra1;
			int changed;
			if (unlikely(idev == NULL))
				return -ENODEV;
			changed = (!*valp) ^ (!new);
			*valp = new;
			if (changed)
				dev_forward_change(idev);
		} else {
			*valp = new;
			addrconf_forward_change();
		}

		if (*valp)
			rt6_purge_dflt_routers();
	} else
		*valp = new;

	return 1;
}

static struct addrconf_sysctl_table
{
	struct ctl_table_header *sysctl_header;
	ctl_table addrconf_vars[__NET_IPV6_MAX];
	ctl_table addrconf_dev[2];
	ctl_table addrconf_conf_dir[2];
	ctl_table addrconf_proto_dir[2];
	ctl_table addrconf_root_dir[2];
} addrconf_sysctl = {
	.sysctl_header = NULL,
	.addrconf_vars = {
        	{
			.ctl_name	=	NET_IPV6_FORWARDING,
			.procname	=	"forwarding",
         		.data		=	&ipv6_devconf.forwarding,
			.maxlen		=	sizeof(int),
			.mode		=	0644,
         		.proc_handler	=	&addrconf_sysctl_forward,
			.strategy	=	&addrconf_sysctl_forward_strategy,
		},
		{
			.ctl_name	=	NET_IPV6_HOP_LIMIT,
			.procname	=	"hop_limit",
         		.data		=	&ipv6_devconf.hop_limit,
			.maxlen		=	sizeof(int),
			.mode		=	0644,
			.proc_handler	=	proc_dointvec,
		},
		{
			.ctl_name	=	NET_IPV6_MTU,
			.procname	=	"mtu",
			.data		=	&ipv6_devconf.mtu6,
         		.maxlen		=	sizeof(int),
			.mode		=	0644,
         		.proc_handler	=	&proc_dointvec,
		},
		{
			.ctl_name	=	NET_IPV6_ACCEPT_RA,
			.procname	=	"accept_ra",
         		.data		=	&ipv6_devconf.accept_ra,
			.maxlen		=	sizeof(int),
			.mode		=	0644,
         		.proc_handler	=	&proc_dointvec,
		},
		{
			.ctl_name	=	NET_IPV6_ACCEPT_REDIRECTS,
			.procname	=	"accept_redirects",
         		.data		=	&ipv6_devconf.accept_redirects,
			.maxlen		=	sizeof(int),
			.mode		=	0644,
         		.proc_handler	=	&proc_dointvec,
		},
		{
			.ctl_name	=	NET_IPV6_AUTOCONF,
			.procname	=	"autoconf",
         		.data		=	&ipv6_devconf.autoconf,
			.maxlen		=	sizeof(int),
			.mode		=	0644,
         		.proc_handler	=	&proc_dointvec,
		},
		{
			.ctl_name	=	NET_IPV6_DAD_TRANSMITS,
			.procname	=	"dad_transmits",
         		.data		=	&ipv6_devconf.dad_transmits,
			.maxlen		=	sizeof(int),
			.mode		=	0644,
         		.proc_handler	=	&proc_dointvec,
		},
		{
			.ctl_name	=	NET_IPV6_RTR_SOLICITS,
			.procname	=	"router_solicitations",
         		.data		=	&ipv6_devconf.rtr_solicits,
			.maxlen		=	sizeof(int),
			.mode		=	0644,
         		.proc_handler	=	&proc_dointvec,
		},
		{
			.ctl_name	=	NET_IPV6_RTR_SOLICIT_INTERVAL,
			.procname	=	"router_solicitation_interval",
         		.data		=	&ipv6_devconf.rtr_solicit_interval,
			.maxlen		=	sizeof(int),
			.mode		=	0644,
         		.proc_handler	=	&proc_dointvec_jiffies,
			.strategy	=	&sysctl_jiffies,
		},
		{
			.ctl_name	=	NET_IPV6_RTR_SOLICIT_DELAY,
			.procname	=	"router_solicitation_delay",
         		.data		=	&ipv6_devconf.rtr_solicit_delay,
			.maxlen		=	sizeof(int),
			.mode		=	0644,
         		.proc_handler	=	&proc_dointvec_jiffies,
			.strategy	=	&sysctl_jiffies,
		},
		{
			.ctl_name	=	NET_IPV6_FORCE_MLD_VERSION,
			.procname	=	"force_mld_version",
         		.data		=	&ipv6_devconf.force_mld_version,
			.maxlen		=	sizeof(int),
			.mode		=	0644,
         		.proc_handler	=	&proc_dointvec,
		},
#ifdef CONFIG_IPV6_PRIVACY
		{
			.ctl_name	=	NET_IPV6_USE_TEMPADDR,