u-boot.git/net/net.c, branch v2018.09

net: Consolidate the parsing of bootfile

2018-07-26T19:08:20+00:00

The same basic parsing was implemented in tftp and nfs, so add a helper
function to do the work once.

Signed-off-by: Joe Hershberger

net: Read bootfile from env on netboot_common()

2018-07-26T19:08:20+00:00

Instead of depending on a env callback for bootfile, read it explicitly.

We do this because the bootfile can be specified on the command line and
if it is, we will overwrite the internal variable. If a netboot_common()
is called again with no bootfile parameter, we want to use the one in
the environment.

Signed-off-by: Joe Hershberger

net: Make copy_filename() accept NULL src

2018-07-26T19:08:20+00:00

Rather than crashing, check the src ptr and set dst to empty string.

Signed-off-by: Joe Hershberger

net: Re-check prerequisites when autoloading

2018-07-26T19:08:20+00:00

With net autoload, we check the prerequisites for the initial command,
but the greater prerequisites when autoloading are not checked.

If we would attempt to autoload, check those prerequisites too.

If we are not expecting a serverip from the server, then don't worry
about it not being set, but don't attempt to load if it isn't.

Signed-off-by: Joe Hershberger

net: When checking prerequisites, consider boot_file_name

2018-07-26T19:08:19+00:00

For net_boot_common, we allow the serverip to be specified as part of
the boot file name. For net commands that require serverip, include that
source as a valid specification of serverip.

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

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: 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: 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

SPDX: Convert a few files that were missed before

2018-05-11T00:38:35+00:00

As part of the main conversion a few files were missed.  These files had
additional whitespace after the '*' and before the SPDX tag and my
previous regex was too strict.  This time I did a grep for all SPDX tags
and then filtered out anything that matched the correct styles.

Fixes: 83d290c56fab ("SPDX: Convert all of our single license tags to Linux Kernel style")
Reported-by: Heinrich Schuchardt 
Signed-off-by: Tom Rini