u-boot.git/lib/lwip/u-boot, branch master Unnamed repository; edit this file 'description' to name the repository. net: lwip: scale buffer pool size with TFTP block size 2026-03-13T16:52:02+00:00 Pranav Tilak pranav.vinaytilak@amd.com 2026-03-10T12:58:25+00:00 67586012490a4b2b4db6b79647aaf946f03eb767 TFTP transfers fail when tftpblocksize is set to 8192 or larger due to insufficient buffer resources for IP fragment reassembly. Calculate PBUF_POOL_SIZE and IP_REASS_MAX_PBUFS dynamically based on CONFIG_TFTP_BLOCKSIZE using IP fragmentation boundaries (1480 usable bytes per fragment at 1500 MTU). The pool size includes headroom for TX, ARP, and protocol overhead, while ensuring PBUF_POOL_SIZE remains greater than IP_REASS_MAX_PBUFS as required by lwIP. Signed-off-by: Pranav Tilak <pranav.vinaytilak@amd.com> 
TFTP transfers fail when tftpblocksize is set to 8192 or larger due to
insufficient buffer resources for IP fragment reassembly.

Calculate PBUF_POOL_SIZE and IP_REASS_MAX_PBUFS dynamically based on
CONFIG_TFTP_BLOCKSIZE using IP fragmentation boundaries (1480 usable
bytes per fragment at 1500 MTU). The pool size includes headroom for
TX, ARP, and protocol overhead, while ensuring PBUF_POOL_SIZE remains
greater than IP_REASS_MAX_PBUFS as required by lwIP.

Signed-off-by: Pranav Tilak <pranav.vinaytilak@amd.com>
net: lwip: Fix PBUF_POOL_BUFSIZE when PROT_TCP_LWIP is disabled 2026-03-13T16:52:02+00:00 Jonas Karlman jonas@kwiboo.se 2026-03-09T21:06:39+00:00 b3ee14ea6d233a507a7983ccb5f1328cc8d683c2 The PBUF_POOL_BUFSIZE ends up being only 592 bytes, instead of 1514, when PROT_TCP_LWIP Kconfig option is disabled. This results in a full Ethernet frame requiring three PBUFs instead of just one. This happens because the PBUF_POOL_BUFSIZE constant depends on the value of a TCP_MSS constant, something that defaults to 536 when PROT_TCP_LWIP is disabled. PBUF_POOL_BUFSIZE = LWIP_MEM_ALIGN_SIZE(TCP_MSS + 40 + PBUF_LINK_HLEN) Ensure that a full Ethernet frame fits inside a single PBUF by moving the define of TCP_MSS outside the PROT_TCP_LWIP ifdef block. Fixes: 1c41a7afaa15 ("net: lwip: build lwIP") Acked-by: Jerome Forissier <jerome.forissier@arm.com> Signed-off-by: Jonas Karlman <jonas@kwiboo.se> 
The PBUF_POOL_BUFSIZE ends up being only 592 bytes, instead of 1514,
when PROT_TCP_LWIP Kconfig option is disabled. This results in a full
Ethernet frame requiring three PBUFs instead of just one.

This happens because the PBUF_POOL_BUFSIZE constant depends on the value
of a TCP_MSS constant, something that defaults to 536 when PROT_TCP_LWIP
is disabled.

  PBUF_POOL_BUFSIZE = LWIP_MEM_ALIGN_SIZE(TCP_MSS + 40 + PBUF_LINK_HLEN)

Ensure that a full Ethernet frame fits inside a single PBUF by moving
the define of TCP_MSS outside the PROT_TCP_LWIP ifdef block.

Fixes: 1c41a7afaa15 ("net: lwip: build lwIP")
Acked-by: Jerome Forissier <jerome.forissier@arm.com>
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
net: lwip: enable debug traces for SNTP when CONFIG_LWIP_DEBUG is set 2025-09-30T10:01:36+00:00 Jerome Forissier jerome.forissier@linaro.org 2025-09-22T09:35:41+00:00 4462ab9a0b559a45c2b3e2dfb3912303e3449c9b Now that SNTP is supported, enable SNTP debug traces when LWIP_DEBUG is enabled. In particular, this allows to see which NTP servers are received during DHCP. Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org> 
Now that SNTP is supported, enable SNTP debug traces when LWIP_DEBUG is
enabled. In particular, this allows to see which NTP servers are
received during DHCP.

Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
net: lwip: add Kconfig option to show ICMP unreachable errors 2025-08-18T12:08:57+00:00 Jerome Forissier jerome.forissier@linaro.org 2025-08-12T12:43:19+00:00 6b914d5596d947ebea4e8697004e210df1abe61e 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 <jerome.forissier@linaro.org> 
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 <jerome.forissier@linaro.org>
lwip: provide a sntp_format_time() function 2025-08-01T07:30:47+00:00 Jerome Forissier jerome.forissier@linaro.org 2025-07-24T15:26:35+00:00 71056afe2094b5a6fad4a2dd940252d1def55e7e Provide a trivial implementation of sntp_format_time() to fix a build error when CONFIG_LWIP_DEBUG=y: lib/lwip/lwip/src/apps/sntp/sntp.c: In function ‘sntp_format_time’: lib/lwip/lwip/src/apps/sntp/sntp.c:283:10: error: implicit declaration of function ‘ctime’ [-Werror=implicit-function-declaration] 283 | return ctime(&ut); | ^~~~~ Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org> 
Provide a trivial implementation of sntp_format_time() to fix a build
error when CONFIG_LWIP_DEBUG=y:

lib/lwip/lwip/src/apps/sntp/sntp.c: In function ‘sntp_format_time’:
lib/lwip/lwip/src/apps/sntp/sntp.c:283:10: error: implicit declaration of function ‘ctime’ [-Werror=implicit-function-declaration]
  283 |   return ctime(&ut);
      |          ^~~~~

Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
lwip: add sntp command 2025-07-08T09:07:37+00:00 Jerome Forissier jerome.forissier@linaro.org 2025-06-25T13:19:19+00:00 a2a0c7527eb86e69bc7a78d9250eb5a1068ae5b7 Implement the sntp command when NET_LWIP=y. Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org> 
Implement the sntp command when NET_LWIP=y.

Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
net: lwip: enable IP_FRAG and IP_REASSEMBLY 2025-07-08T07:53:59+00:00 Tim Harvey tharvey@gateworks.com 2025-05-30T15:38:23+00:00 50a86eb97f05a2f300809deab32eed894f1860b9 Enable IP_FRAG and IP_REASSEMBLY to allow packets larger than MTU. Signed-off-by: Tim Harvey <tharvey@gateworks.com> Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org> Acked-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com> 
Enable IP_FRAG and IP_REASSEMBLY to allow packets larger than MTU.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org>
Acked-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
net: use strnstr() for lwip_strnstr() 2025-02-12T18:37:19+00:00 Heinrich Schuchardt heinrich.schuchardt@canonical.com 2025-02-03T09:12:02+00:00 331d75544fc843f93275eb3767753e4a0a712a39 Using strstr() instead of strnstr() creates a security concern. Fixes: 1c41a7afaa15 ("net: lwip: build lwIP") Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com> Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org> Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org> 
Using strstr() instead of strnstr() creates a security concern.

Fixes: 1c41a7afaa15 ("net: lwip: build lwIP")
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
net: disable MBEDTLS in SPL 2024-12-06T23:47:23+00:00 Heinrich Schuchardt heinrich.schuchardt@canonical.com 2024-12-06T11:37:09+00:00 c7401fc1d99b88a3a3d16519f07974473908cd46 Building SPL fails with MBEDTLS enabled. Currently we don't need it there. Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com> Acked-by: Jerome Forissier <jerome.forissier@linaro.org> 
Building SPL fails with MBEDTLS enabled.
Currently we don't need it there.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Acked-by: Jerome Forissier <jerome.forissier@linaro.org>
lwip: fix code style issues 2024-11-15T00:14:05+00:00 Jerome Forissier jerome.forissier@linaro.org 2024-11-07T11:27:57+00:00 356011f7ac25113d44869350d352a3fc64a7ee75 Fix various code style issues in the lwIP code. Reported-by: Tom Rini <trini@konsulko.com> Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org> Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> 
Fix various code style issues in the lwIP code.

Reported-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>