u-boot.git/net, branch v2025.10

net: lwip: ensure alignment of packet buffers

2025-09-30T11:08:38+00:00

Network packet buffers should be aligned to PKTALIGN. Add a compiler
attribute to ensure this.

Signed-off-by: Tim Harvey 
[jf: use __aligned(x) from ]
Signed-off-by: Jerome Forissier

net: lwip: dhcp: set ntpserverip environment variable

2025-09-30T10:01:36+00:00

Once the DHCP exchange is complete, if we have an IP address for an NTP
server, set the ntpserverip environment variable accordingly. Although
not necessary to make the sntp command use that server (since it is
known internally to the lwIP stack), this makes the behavior in line
with the legacy NET stack. This is also consistent with exporting the
DNS servers etc.

Signed-off-by: Jerome Forissier 
Suggested-by: Michal Simek

net: lwip: dhcp: make NTP servers usable by the sntp command

2025-09-30T10:01:36+00:00

When both CMD_DHCP and CMD_SNTP are enabled, one would expect the NTP
servers received by DHCP to be used by the sntp command by default. Fix
dhcp_loop() so that it is indeed the case.

Signed-off-by: Jerome Forissier 
Reported-by: Michal Simek

net: lwip: ping: set net_try_count to 1

2025-08-18T13:47:58+00:00

The legacy network stack sets net_try_count to 1 at the beginning of the
net_loop() function. This is required for net_start_again() to work
properly. Therefore, set the variable accordingly in the do_ping()
function when NET_LWIP=y. This fixes an issue where a ping to an
unreachable destination would run twice on the same network device. For
example with qemu_arm64_lwip_defconfig:

 => dhcp
 DHCP client bound to address 10.0.2.15 (3 ms)
 => ping 10.0.0.1
 Using virtio-net#32 device
 ping failed; host 10.0.0.1 is not alive
 Using virtio-net#32 device
 ping failed; host 10.0.0.1 is not alive
 => QEMU: Terminated

Signed-off-by: Jerome Forissier

net: introduce CONFIG_DNS

2025-08-18T13:47:58+00:00

Introduce the DNS Kconfig symbol so that various network commands may
use host names without the dns command (CMD_DNS) being selected.

Signed-off-by: Jerome Forissier 
CC: E Shattow

net: add missing SPDX-License-Identifier for files originating from LiMon

2025-08-18T13:47:57+00:00

The header of LiMon imported files reference a License file which
does not exist in U-Boot. Some files were forgotten when adding the
SPDX-License-Identifier.
The LiMon files were originally licensed under GPLv2 as can be seen in
commit [2ea91039].

Based on this commit, add the correct SPDX license identifier.
While at it drop the reference to the non-existing License file from all
LiMon files and update the SPDX-License-Identifier to SPDX version 3.

Signed-off-by: Max Merchel

net: lwip: add Kconfig option to show ICMP unreachable errors

2025-08-18T12:08:57+00:00

Add Kconfig symbol LWIP_ICMP_SHOW_UNREACH which, when enabled, prints a
message to the console upon reception of ICMP unreachable messages. For
example:

 $ make qemu_arm64_lwip_defconfig
 $ qemu-system-aarch64 -M virt -cpu max -nographic -bios u-boot.bin
 [...]
 => dhcp
 DHCP client bound to address 10.0.2.15 (0 ms)
 => tftp 192.168.0.100:69:Image
 Using virtio-net#32 device
 TFTP from server 192.168.0.100; our IP address is 10.0.2.15
 Filename 'Image'.
 Load address: 0x40200000
 Loading: ICMP destination unreachable (host unreachable) from 192.168.0.16
 Timeout!
 => tftp 192.168.0.16:69:Image
 Using virtio-net#32 device
 TFTP from server 192.168.0.16; our IP address is 10.0.2.15
 Filename 'Image'.
 Load address: 0x40200000
 Loading: ICMP destination unreachable (port unreachable) from 192.168.0.16
 Timeout!
 =>

Submitted upstream as https://github.com/lwip-tcpip/lwip/pull/73.

Signed-off-by: Jerome Forissier

net: lwip: remove eth_init from net_init as it is called later

2025-08-01T07:30:47+00:00

The call to eth_init within net_init causes the network interface to
start, stop, start again which can cause issues with certain network
device drivers. Remove it to make it behave like the legacy network
path.

Fixes: 5666865decb8 ("net: lwip: fix initialization sequence before a command")
Signed-off-by: Tim Harvey 
Reviewed-by: Jerome Forissier

net: lwip: simplify net_lwip_eth_start

2025-08-01T07:30:47+00:00

For NET_LWIP eth_is_on_demand_init() is always 1 so remove the check and
simplify the code.

Suggested-by: Jerome Forissier 
Signed-off-by: Tim Harvey 
Reviewed-by: Jerome Forissier

net: wget: Fix comparison of unsigned variable

2025-08-01T07:30:47+00:00

content_length is an unsigned long and so testing that it is >= 0 will
always be true. Instead test that it is != -1 as that is the condition
set on error.

This issue found by Smatch.

Signed-off-by: Andrew Goodbody 
Reviewed-by: Jerome Forissier