u-boot.git/net/net.c, branch master

net: Stop conflating return value with file size in net_loop()

2026-02-06T15:37:31+00:00

The net_loop() currently conflates return value with file size
at the end of successful transfer, in NETLOOP_SUCCESS state.

The return type of net_loop() is int, which makes this practice
workable for file sizes below 2 GiB, but anything above that will
lead to overflow and bogus negative return value from net_loop().

The return file size is only used by a few sites in the code base,
which can be easily fixed. Change the net_loop() return value to
always be only a return code, in case of error the returned value
is the error code, in case of successful transfer the value is 0
or 1 instead of 0 or net_boot_file_size . This surely always fits
into a signed integer.

By keeping the return code 0 or 1 in case of successful transfer,
no conditionals which depended on the old behavior are broken, but
all the sites had to be inspected and updated accordingly.

Fix the few sites which depend on the file size by making them
directly use the net_boot_file_size variable value. This variable
is accessible to all of those sites already, because they all
include net-common.h .

Signed-off-by: Yuya Hamamachi 
Signed-off-by: Marek Vasut

net: Move some variables to net-common files

2026-01-15T10:09:28+00:00

Make some variables available to be used by either the legacy network
code or lwIP by moving them into the net-common files. This also allowed
removing a small number of duplicated variables from the lwIP code.

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

net: move net_state to net-common

2026-01-15T10:09:28+00:00

Move the net_state variable into common code so that it can be used by
either the legacy network code or lwIP. This is needed for porting
across the NFS support code for use with lwIP.

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

net: remove unreachable legacy LED code

2025-12-05T16:34:52+00:00

The code is guarded by a condition none of the defconfigs meet (that is
CONFIG_SYS_FAULT_ECHO_LINK_DOWN and CONFIG_LED_STATUS_RED both enabled),
so we can remove the unreachable code sections.

When doing that, there's no caller for miiphy_link anymore, so it can be
removed.

This in turns makes CONFIG_SYS_FAULT_ECHO_LINK_DOWN and
CONFIG_SYS_FAULT_MII_ADDR unused so they are removed as well.

Signed-off-by: Quentin Schulz 
Reviewed-by: Tom Rini

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

use proper fallthrough annotations

2025-04-08T22:23:51+00:00

In some cases in the generic code, we were already using switch/case
fallthrough annotations comments, though in a way which might not be
understood by most compilers.

Replace two non-standard /* no break */ comments with our fallthrough;
statement-like macro, to make this visible to the compiler.
Also use this macro in place of an /* Fall through */ comment, to be
more consistent.

Signed-off-by: Andre Przywara 
Reviewed-by: Tom Rini

net/net: fix include ordering

2024-12-28T17:59:42+00:00

fix include ordering to follow
  https://docs.u-boot.org/en/latest/develop/codingstyle.html#include-files

Signed-off-by: Mikhail Kshevetskiy 
Reviewed-by: Simon Glass

net/tcp: improve tcp framework, use better state machine

2024-12-28T17:59:42+00:00

Changes:
 * Fix initial send sequence always zero issue
 * Use state machine close to RFC 9293. This should make TCP
   transfers more reliable (now we can upload a huge array
   of data from the board to external server)
 * Improve TCP framework a lot. This should make tcp client
   code much more simple.
 * rewrite wget with new tcp stack
 * rewrite fastboot_tcp with new tcp stack

It's quite hard to fix the initial send sequence (ISS) issue
with the separate patch. A naive attempt to fix an issue
inside the tcp_set_tcp_header() function will break tcp packet
retransmit logic in wget and other clients.

Example:
  Wget stores tcp_seq_num value before tcp_set_tcp_header() will
  be called and (on failure) retransmit the packet with the stored
  tcp_seq_num value. Thus:
    * the same ISS must allways be used (current case)
    * or tcp clients needs to generate a proper ISS when
      required.

A proper ISS fix will require a big redesing comparable with
a this one.

Signed-off-by: Mikhail Kshevetskiy 
Reviewed-by: Simon Glass

net/tcp: add connection info to tcp_stream structure

2024-12-28T17:59:42+00:00

Changes:
 * Avoid use net_server_ip in tcp code, use tcp_stream data instead
 * Ignore packets from other connections if connection already created.
   This prevents us from connection break caused by other tcp stream.

Signed-off-by: Mikhail Kshevetskiy 
Reviewed-by: Simon Glass