u-boot.git/net/net.c, branch v2015.01

SPDX License cleanup for LiMon imported files

2014-10-10T13:44:43+00:00

A number of network related files were imported from the LiMon
project; these contain a somewhat unclear license statement:

	Copyright 1994 - 2000 Neil Russell.
	(See License)

I analyzed the source code of LiMon v1.4.2 which was used for this
import.  It does not contain any "License" file, but the top level
directory contains a file "COPYING", which turns out to be GPL v2
of June 1991.  So it is legitimate to conclude that the LiMon derived
files are also to be released under GPLv2.  Mark them as such.

Signed-off-by: Wolfgang Denk

net: BOOTP retry timeout improvements

2014-08-09T15:17:03+00:00

Currently, the BOOTP code sends out its initial request as soon as the
Ethernet driver indicates "link up". If this packet is lost or not
replied to for some reason, the code waits for a 1s timeout before
retrying. For some reason, such early packets are often lost on my
system, so this causes an annoying delay.

To optimize this, modify the BOOTP code to have very short timeouts for
the first packet transmitted, but gradually increase the timeout each
time a timeout occurs. This way, if the first packet is lost, the second
packet is transmitted quite quickly and hence the overall delay is low.
However, if there's still no response, we don't keep spewing out packets
at an insane speed.

It's arguably more correct to try and find out why the first packet is
lost. However, it seems to disappear inside my Ethenet chip; the TX chip
indicates no error during TX (not that it has much in the way of
reporting...), yet wireshark on the RX side doesn't see any packet.
FWIW, I'm using an ASIX USB Ethernet adapter. Perhaps "link up" is
reported too early or based on the wrong condition in HW, and we should
add some fixed extra delay into the driver. However, this would slow down
every link up event even if it ends up not being needed in some cases.
Having BOOTP retry quickly applies the fix/WAR to every possible
Ethernet device, and is quite simple to implement, so seems a better
solution.

Signed-off-by: Stephen Warren 
Acked-by: Joe Hershberger

fix: CONFIG_NETCONSOLE start/handle this stuff only outside SPL

2014-06-19T15:19:05+00:00

SPL stage does not support various networking things, and therefore
CONFIG_NETCONSOLE cannot be built within SPL.

Signed-off-by: Hannes Petermaier

NET: Add net_busy_flag if CONFIG_USB_KEYBOARD is defined

2013-08-26T19:56:35+00:00

This flag is to make console aware that NET transfer is running or not.

Signed-off-by: Jim Lin

NET: Fix system hanging if NET device is not installed

2013-06-19T12:32:44+00:00

If we try to boot from NET device, NetInitLoop in net.c will be invoked.
If NET device is not installed, eth_get_dev() function will return
eth_current value, which is NULL.
When NetInitLoop is called, "eth_get_dev->enetaddr" will access
restricted memory area and therefore cause hanging.
This issue is found on Tegra30 Cardhu platform after adding
CONFIG_CMD_NET and CONFIG_CMD_DHCP in config header file.

Signed-off-by: Jim Lin 
Tested-by: Stephen Warren

net: Use new numeric setenv functions

2013-03-01T03:09:23+00:00

Use setenv_ulong(), setenv_hex() and setenv_addr() in net/

Signed-off-by: Simon Glass

env: Add a bootfile env handler

2012-12-13T18:46:55+00:00

Remove the hard-coded bootfile handler and use a callback instead

Signed-off-by: Joe Hershberger

env: Use getenv_yesno() more generally

2012-12-13T18:46:55+00:00

Move the getenv_yesno() to env_common.c and change most checks for
'y' or 'n' to use this helper.

Signed-off-by: Joe Hershberger

net/: sparse fixes

2012-11-04T18:00:36+00:00

bootp.c:44:14: warning: symbol 'dhcp_state' was not declared. Should it be static?
bootp.c:45:15: warning: symbol 'dhcp_leasetime' was not declared. Should it be static?
bootp.c:46:10: warning: symbol 'NetDHCPServerIP' was not declared. Should it be static?
arp.c:30:17: warning: symbol 'NetArpWaitReplyIP' was not declared. Should it be static?
arp.c:37:16: warning: symbol 'NetArpTxPacket' was not declared. Should it be static?
arp.c:38:17: warning: symbol 'NetArpPacketBuf' was not declared. Should it be static?
atheros.c:33:19: warning: symbol 'AR8021_driver' was not declared. Should it be static?
net.c:183:7: warning: symbol 'PktBuf' was not declared. Should it be static?
net.c:159:21: warning: symbol 'net_state' was not declared. Should it be static?
ping.c:73:6: warning: symbol 'ping_start' was not declared. Should it be static?
ping.c:82:13: warning: symbol 'ping_receive' was not declared. Should it be static?
tftp.c:53:7: warning: symbol 'TftpRRQTimeoutMSecs' was not declared. Should it be static?
tftp.c:54:5: warning: symbol 'TftpRRQTimeoutCountMax' was not declared. Should it be static?
eth.c:125:19: warning: symbol 'eth_current' was not declared. Should it be static?

Note: in the ping.c fix, commit a36b12f95a29647a06b5459198684fc142482020
"net: Move PING out of net.c" mistakenly carried the ifdef CMD_PING
clause from when it was necessary to avoid warnings when it was embedded
in net.c.

Signed-off-by: Kim Phillips

net: fix netconsole filtering

2012-10-03T23:01:22+00:00

Adjustment of Michael Walle's fix patch

Commit 8a0eccb1056b313b45ab62e3aac400f339aa71b4 breaks netconsole. src_ip
must not be converted to host byte order, because nc_ip is already stored
in network byte order (see string_to_ip(), called by getenv_IPaddr()).

Signed-off-by: Joe Hershberger