u-boot.git/lib/lwip, branch v2026.04

net: lwip: tftp: add support of tsize option to client

2026-02-06T15:42:37Z

The TFTP server can report the size of the entire file that is about to be received in the Transfer Size Option, this is described in RFC 2349. This functionality is optional and the server may not report tsize in case it is not supported. Always send tsize request to the server to query the transfer size, and in case the server does respond, cache that information locally in tftp_state.tsize, otherwise cache size 0. Introduce new function tftp_client_get_tsize() which returns the cached tftp_state.tsize so clients can determine the transfer size and use it. Update net/lwip/tftp.c to make use of tftp_client_get_tsize() and avoid excessive printing of '#' during TFTP transfers in case the transfer size is reported by the server. Submitted upstream: https://savannah.nongnu.org/patch/index.php?item_id=10557 Signed-off-by: Marek Vasut Acked-by: Jerome Forissier

net: lwip: tftp: Do not write past buffer end

2026-02-04T08:04:36Z

sprintf will add a trailing \0 so manually adding a trailing \0 will result in an extra unaccounted for character being written. This overwrote the first byte of the following allocation block resulting in unexpected behavior. This was found by Running 'pxe get' with no available file resulting in multiple attempts, using the default algorithm, to attempt to find a file. Eventually there would be a failed assert when free() was called. Failing the assert would result in a system reset. Fixes: 27d7ccda94fa ("net: lwip: tftp: add support of blksize option to client") Reported-by: Michal Simek Tested-by: Michal Simek Signed-off-by: Andrew Goodbody Tested-by: Tom Rini # Pine64+ Reviewed-by: Jerome Forissier Reviewed-by: Jerome Forissier

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

lwip: tftp: resend initial request

2025-08-18T13:47:58Z

The TFTP implementation does not resend the initial request if there is no response from the server. Since TFTP is based on UDP, there should be a mechanism to deal with unreliable transmissions at this point, similar to what we have for data packets. Therefore, introduce request retransmission. Signed-off-by: Jerome Forissier CC: Venkatesh Abbarapu CC: Michal Simek CC: Ilias Apalodimas

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: icmp: allow reporting ICMP destination unreachable

2025-08-18T12:08:57Z

Allow reporting ICMP destination unreachable messages via a user-defined callback. 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, net-lwip: wget: suppress console output when called by EFI

2025-05-20T13:43:08Z

Functions called from EFI applications should not do console output. Refactor the wget code to implement this requirement. The wget_http_info struct is used to hold the boolean that signifies whether the output is allowed or not. Signed-off-by: Jerome Forissier Reported-by: Heinrich Schuchardt