Hi Maxim, On Fri, 5 May 2023 at 04:50, Maxim Uvarov <maxim.uva...@linaro.org> wrote: > > Greetings, > > This RFC patchset is an attempt to try to use an already existing IP network > stack inside U-boot. > U-Boot recently got basic TCP/IP support, implementing wget, but in order to > get a full IP stack > with new features (e.g ipv6), it would be preferable to use an established > embedded ip library, > instead of rewriting the code from scratch. > > For this experiment LWIP network stack was selected: > https://savannah.nongnu.org/git/?group=lwip > > LWIP main features include: > - Protocols: IP, IPv6, ICMP, ND, MLD, UDP, TCP, IGMP, ARP, PPPoS, PPPoE > - DHCP client, DNS client (incl. mDNS hostname resolver), AutoIP/APIPA > (Zeroconf), > SNMP agent (v1, v2c, v3, private MIB support & MIB compiler) > - APIs: specialized APIs for enhanced performance, optional Berkeley-alike > socket API > - Extended features: IP forwarding over multiple network interfaces, TCP > congestion control, > RTT estimation and fast recovery/fast retransmit > - Addon applications: HTTP(S) server, SNTP client, SMTP(S) client, ping, > NetBIOS nameserver, > mDNS responder, MQTT client, TFTP server. > > This RFC work is a demo to enable lwIP (lightweight IP) which is a widely > used open-source > TCP/IP stack designed for embedded systems for U-boot. That will allow using > already > written network applications for microcontrollers. > > lwIP is licensed under a BSD-style license: > http://lwip.wikia.com/wiki/License. > Which should be compatible with u-boot. > > In the current RFC I tried to use minimal changes to better see how LWIP code > can be embedded into > U-boot. Patches implement ping and wget commands work. Both commands are > currently copy pasting and > reusing lwIP examples. Whether we want to add the final application in > U-Boot or lwIP is up to > discussion, but the current approach was the easiest one for an RFC. > > Looking for your comments, > Best regards, > Maxim. > > Maxim Uvarov (5): > add lwip-external submodule > lib/lwip: compile-in core files > add doc/README.lwip > add doc/README.lwip.size > lwip: implement wget command from http_client.c example > > .gitignore | 5 + > .gitmodules | 3 + > doc/README.lwip | 90 +++++ > doc/README.lwip.size | 291 +++++++++++++++ > include/net.h | 2 +- > lib/Kconfig | 2 + > lib/Makefile | 2 + > lib/lwip/Kconfig | 12 + > lib/lwip/Makefile | 86 +++++ > lib/lwip/apps/http/lwip-wget.c | 67 ++++ > lib/lwip/apps/http/rmstatic.patch | 47 +++ > lib/lwip/apps/ping/lwip_ping.c | 33 ++ > lib/lwip/apps/ping/lwip_ping.h | 19 + > lib/lwip/apps/ping/ping.h | 0 > lib/lwip/apps/ping/rmstatic.patch | 32 ++ > lib/lwip/cmd-lwip.c | 129 +++++++ > lib/lwip/lwip-external | 1 + > lib/lwip/lwipopts.h | 484 +++++++++++++++++++++++++ > lib/lwip/port/if.c | 256 +++++++++++++ > lib/lwip/port/include/arch/cc.h | 41 +++ > lib/lwip/port/include/arch/sys_arch.h | 78 ++++ > lib/lwip/port/include/arch/u-sockets.h | 26 ++ > lib/lwip/port/include/limits.h | 0 > lib/lwip/port/sys-arch.c | 7 + > net/eth-uclass.c | 4 +- > net/net.c | 14 + > 26 files changed, 1729 insertions(+), 2 deletions(-) > create mode 100644 .gitmodules > create mode 100644 doc/README.lwip > create mode 100644 doc/README.lwip.size > create mode 100644 lib/lwip/Kconfig > create mode 100644 lib/lwip/Makefile > create mode 100644 lib/lwip/apps/http/lwip-wget.c > create mode 100644 lib/lwip/apps/http/rmstatic.patch > create mode 100644 lib/lwip/apps/ping/lwip_ping.c > create mode 100644 lib/lwip/apps/ping/lwip_ping.h > create mode 100644 lib/lwip/apps/ping/ping.h > create mode 100644 lib/lwip/apps/ping/rmstatic.patch > create mode 100644 lib/lwip/cmd-lwip.c > create mode 160000 lib/lwip/lwip-external > create mode 100644 lib/lwip/lwipopts.h > create mode 100644 lib/lwip/port/if.c > create mode 100644 lib/lwip/port/include/arch/cc.h > create mode 100644 lib/lwip/port/include/arch/sys_arch.h > create mode 100644 lib/lwip/port/include/arch/u-sockets.h > create mode 100644 lib/lwip/port/include/limits.h > create mode 100644 lib/lwip/port/sys-arch.c > > -- > 2.30.2 >
I don't know much about lwip but I certainly think we should be open to changing the network stack, if it is better. Regards, Simon
