When using commands based on UDP such as tftp or sntp, if the server is not reachable or the service is not started on the expected port then the command ultimately times out. However it often happens that the server or a router sends back an ICMP Destination Unreachable message. That can help troubleshooting. Therefore, add support to the lwIP stack and to U-Boot to handle those packets and print a diagnostic message on the console.
Changes in v2: - Fix typo in subject (s/detination/destination) - Add link to upstream pull request Jerome Forissier (2): lwip: icmp: allow reporting ICMP destination unreachable net: lwip: add Kconfig option to show ICMP unreachable errors lib/lwip/lwip/src/core/ipv4/icmp.c | 17 +++++++++---- lib/lwip/u-boot/arch/cc.h | 7 ++++++ lib/lwip/u-boot/lwipopts.h | 4 ++++ net/lwip/Kconfig | 13 ++++++++++ net/lwip/Makefile | 1 + net/lwip/icmp_unreach.c | 38 ++++++++++++++++++++++++++++++ 6 files changed, 76 insertions(+), 4 deletions(-) create mode 100644 net/lwip/icmp_unreach.c -- 2.43.0 base-commit: ae5711f881100f856ead1e76832c32b92dba93c7 branch: lwip-icmp-unreach
