u-boot.git/net, branch v2018.07-rc3

net: Add option to prefer bootp/dhcp serverip

2018-07-02T19:14:21+00:00

Currently we can choose between 2 different types of behavior for the
serverip variable:

  1) Always overwrite it with the DHCP server IP address (default)
  2) Ignore what the DHCP server says (CONFIG_BOOTP_SERVERIP)

This patch adds a 3rd option:

  3) Use serverip from DHCP if no serverip is given
     (CONFIG_BOOTP_PREFER_SERVERIP)

With this new option, we can have the default case that a boot file gets
loaded from the DHCP provided TFTP server work while allowing users to
specify their own serverip variable to explicitly use a different tftp
server.

Signed-off-by: Alexander Graf 
Acked-by: Joe Hershberger

net: Prefer command line arguments

2018-07-02T19:14:20+00:00

We can call commands like dhcp and bootp without arguments or with
explicit command line arguments that really should tell the code where
to look for files instead.

Unfortunately, the current code simply overwrites command line arguments
in the dhcp case with dhcp values.

This patch allows the code to preserve the command line values if they
were set on the command line. That way the semantics are slightly more
intuitive.

The reason this patch does that by introducing a new variable is that we
can not rely on net_boot_file_name[0] being unset, as today it's
completely legal to call "dhcp" and afterwards run "tftp" and expect the
latter to repeat the same query as before. I would prefer not to break
that behavior in case anyone relies on it.

Signed-off-by: Alexander Graf 
Acked-by: Joe Hershberger

net: Add new wol command - Wake on LAN

2018-07-02T19:14:20+00:00

Add a new command 'wol': Wait for an incoming Wake-on-LAN packet or
time out if no WoL packed is received.
If the WoL packet contains a password, it is saved in the environment
variable 'wolpassword' using the etherwake format (dot or colon
separated decimals).

Intended use case: a networked device should boot an alternate image.
It's attached to a network on a client site, modifying the DHCP server
configuration or setup of a tftp server is not allowed.
After power on the device waits a few seconds for a WoL packet. If a
packet is received, the device boots the alternate image. Otherwise
it boots the default image.

This method is a simple way to interact with a system via network even
if only the MAC address is known. Tools to send WoL packets are
available on all common platforms.

Some Ethernet drivers seem to pad the incoming packet. The additional
padding bytes might be recognized as Wake-on-LAN password bytes.

By default enabled in pengwyn_defconfig.

Signed-off-by: Lothar Felten 
Acked-by: Joe Hershberger

net: fastboot: Fix build when FASTBOOT_FLASH is disabled

2018-07-02T19:14:20+00:00

When building without FASTBOOT_FLASH we don't include the intermediate
update callback to keep the client alive, so ensure we don't try setting
it here.

Signed-off-by: Alex Kiernan 
Acked-by: Joe Hershberger

net: nfs: don't fail when nfs_read_reply returns -NFS_RPC_DROP

2018-06-13T18:54:16+00:00

That can happen if duplicate UDP packet arrived, and that's not uncommon.
Anyway, we ignore packets with rpc_id lower than last we sent for other
requests, so it makes sense to do that for read request as well.

Signed-off-by: Vasily Khoruzhick 
Acked-by: Joe Hershberger

net: Protect net_state from reentrant net_loop()

2018-06-13T18:54:16+00:00

Global variable "net_state" is used in net_loop() state-machine.
But it happens that some times the net_loop() can be called
multiple times in the same call stack. For example when the
netconsole is enabled and we print the message while some other
net protocol is in action. Netconsole will overwrite the "net_state"
and that will break the logic for earlier started protocol.

To protect the state save and restore "net_state" variable each
time when we enter and exit net_loop().

Signed-off-by: Leonid Iziumtsev 
Acked-by: Joe Hershberger

net: Initialize as many ethernet devices as possible

2018-06-13T18:54:15+00:00

On devices that have their first network interface provided by a FPGA,
the initialization of further interfaces will fail if the FPGA is not
yet programmed. This leads to problems during factory setup when the
data is supposed to be loaded over secondary netowork interfaces.

To avoid this, use the uclass_{first,next}_device_check functions to
initialize as many ethernet devices as possible.

Signed-off-by: Mario Six 
Acked-by: Joe Hershberger

net: Always align tx packets

2018-06-13T18:54:15+00:00

Make sure that TX packets are always cache-aligned.

Signed-off-by: Mario Six 
Acked-by: Joe Hershberger

net: fastboot: Merge AOSP UDP fastboot

2018-05-30T09:59:21+00:00

Merge UDP fastboot support from AOSP:

  https://android.googlesource.com/platform/external/u-boot/+/android-o-mr1-iot-preview-8

Signed-off-by: Alex Kiernan 
Signed-off-by: Alex Deymo 
Signed-off-by: Jocelyn Bohr 
Reviewed-by: Simon Glass

net: bootp: Fix compile error processing ntpserver option

2018-05-15T01:28:38+00:00

When the following configuration is set

  # CONFIG_CMD_DHCP is not set
  CONFIG_CMD_BOOTP=y
  CONFIG_BOOTP_NTPSERVER=y

The following compile error is observed

  error: used struct type value where scalar is required
    if (net_ntp_server)
        ^~~~~~~~~~~~~~

Resolve this by checking net_ntp_server.s_addr instead.

Signed-off-by: Chris Packham 
Acked-by: Joe Hershberger