u-boot.git/lib/lwip/u-boot, branch next

net: lwip: add tftpsrv command

2026-07-23T15:05:20Z

The legacy network stack supports tftpsrv, which listens for an incoming TFTP write request and receives the first file into memory. Despite the old command help wording, the command returns after receiving the file and does not boot it automatically. The lwIP stack already builds the lwIP TFTP application, but only wires it up for client-side tftpboot. Add a lwIP tftpsrv command and implement the server path with tftp_init_server(). Reuse the existing lwIP TFTP write callback and memory copy path so LMB checks, progress output, filesize/fileaddr updates and EFI bootdev handling stay consistent with tftpboot. Track receive timeout and write-failure state around the lwIP callbacks so a stalled or rejected receive is not reported as a successful close. Move CMD_TFTPSRV out of the legacy-only Kconfig block so it can be enabled with either network stack. Update the command help text and add usage documentation for the receive-only behavior. Add pytest coverage for tftpsrv using a generated host file and curl's TFTP upload support. Enable the command in qemu_arm64_lwip_defconfig so the test can be run with the existing lwIP QEMU build when the boardenv provides env__net_tftpsrv_file. Signed-off-by: James Hilliard [Jerome Forissier: remove trailing ':' after SPDX tag] Signed-off-by: Jerome Forissier Reviewed-by: Jerome Forissier

net: lwip: scale buffer pool size with TFTP block size

2026-03-13T16:52:02Z

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

net: lwip: Fix PBUF_POOL_BUFSIZE when PROT_TCP_LWIP is disabled

2026-03-13T16:52:02Z

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 Signed-off-by: Jonas Karlman

net: lwip: enable debug traces for SNTP when CONFIG_LWIP_DEBUG is set

2025-09-30T10:01:36Z

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

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

2025-08-18T12:08:57Z

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

lwip: provide a sntp_format_time() function

2025-08-01T07:30:47Z

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

lwip: add sntp command

2025-07-08T09:07:37Z

Implement the sntp command when NET_LWIP=y. Signed-off-by: Jerome Forissier

net: lwip: enable IP_FRAG and IP_REASSEMBLY

2025-07-08T07:53:59Z

Enable IP_FRAG and IP_REASSEMBLY to allow packets larger than MTU. Signed-off-by: Tim Harvey Reviewed-by: Jerome Forissier Acked-by: Heinrich Schuchardt

net: use strnstr() for lwip_strnstr()

2025-02-12T18:37:19Z

Using strstr() instead of strnstr() creates a security concern. Fixes: 1c41a7afaa15 ("net: lwip: build lwIP") Signed-off-by: Heinrich Schuchardt Reviewed-by: Jerome Forissier Reviewed-by: Ilias Apalodimas Signed-off-by: Jerome Forissier

net: disable MBEDTLS in SPL

2024-12-06T23:47:23Z

Building SPL fails with MBEDTLS enabled. Currently we don't need it there. Signed-off-by: Heinrich Schuchardt Acked-by: Jerome Forissier