On Mon, Jun 17, 2024 at 8:33 AM Jerome Forissier <jerome.foriss...@linaro.org> wrote: > > This is a rework of a patch series by Maxim Uvarov: "net/lwip: add lwip > library for the network stack" [1]. The goal is to introduce the lwIP TCP/IP > stack [2] [3] as an alternative to the current implementation in net/, > selectable with Kconfig, and ultimately keep only lwIP if possible. Some > reasons for doing so are: > - Make the support of HTTPS in the wget command easier. Javier T. (CC'd) > has some additional lwIP and Mbed TLS patches to do so. With that it > becomes possible to fetch and launch a distro installer such as Debian > etc. using a secure, authenticated connection directly from the U-Boot > shell. Several use cases: > * Authentication: prevent MITM attack (third party replacing the > binary with a different one) > * Confidentiality: prevent third parties from grabbing a copy of the > image as it is being downloaded > * Allow connection to servers that do not support plain HTTP anymore > (this is becoming more and more common on the Internet these days) > - Possibly benefit from additional features implemented in lwIP > - Less code to maintain in U-Boot > > Prior to applying this series, the lwIP stack needs to be added as a > Git subtree with the following command: > > $ git subtree add --squash --prefix lib/lwip/lwip > https://git.savannah.gnu.org/git/lwip.git STABLE-2_2_0_RELEASE > > The first patch renames some enums in order to avoid a conflict when a > later patch enables the lwIP library. > > The second patch introduces a new Kconfig symbol: NET_LWIP, which selects > the lwIP implementation instead of the current one (NET). Contrary to the > approach chosen by Maxim in [1], NET_LWIP and NET cannot be enabled > simultaneously. The rationale is we want to start from a clean state and > not pull potentially duplicated functionality from both stacks. Note > however that a few files are still built in net/, they are the ones > related to ethernet device management and the ethernet bootflow. > > The third patch splits the net.h header into net-legacy.h, net-common.h, > net-lwip.h, leaving net.h as a simple wrapper. > > The fourth patch introduces the Makefile to build lwIP when NET_LWIP is > enabled. > > The subsequent patches implement various network-oriented commands and > features: dhcp, dns, ping, tftpboot, wget. > > A number of features are currently incompatible with NET_LWIP: SANDBOX, > DFU_TFTP, FASTBOOT, SPL_NET. All make assumptions on how the network > stack is implemented and/or pull sybols that are not trivially exported > from lwIP. Some interface rework may be needed. > > Due to the above and in order to provide some level of testing, a new QEMU > configuration is introduced (qemu_arm64_lwip_defconfig) which is the same > as qemu_arm64_defconfig but with NET_LWIP and CMD_*_LWIP enabled. > Tests are added to test/py/tests/test_net.py for that configuration. >
Hi Jermone, I've given this a spin on an imx8mm-venice-gw73xx-0x via imx8mm_venice_defconfig and I can't get DHCP to work (didn't work in v3 either): $ diff defconfig configs/imx8mm_venice_defconfig 68,69c68,71 < CONFIG_CMD_DNS_LWIP=y < CONFIG_CMD_WGET_LWIP=y --- > CONFIG_CMD_DHCP6=y > CONFIG_CMD_TFTPPUT=y > CONFIG_SYS_DISABLE_AUTOLOAD=y > CONFIG_CMD_WGET=y 88,90c90,94 < CONFIG_NET_LWIP=y < CONFIG_LWIP_DEBUG=y < CONFIG_LWIP_ASSERT=y --- > CONFIG_NET_RANDOM_ETHADDR=y > CONFIG_IP_DEFRAG=y > CONFIG_TFTP_BLOCKSIZE=4096 > CONFIG_PROT_TCP_SACK=y > CONFIG_IPV6=y Target: u-boot=> net list eth0 : ethernet@30be0000 00:d0:12:b5:f8:41 active u-boot=> dhcp || echo fail eth0: ethernet@30be0000 00:d0:12:b5:f8:41 active netif_set_ipaddr: netif address being changed netif: added interface 0 addr 192.168.1.1 netmask 0.0.0.0 gw 0.0.0.0 etharp_request: sending ARP request. etharp_raw: sending raw ARP packet. ethernet_output: sending packet 000000007df00bf0 dhcp_start(netif=000000007df2af40) 0dhcp_start(): mallocing new DHCP client dhcp_start(): allocated dhcp dhcp_start(): starting DHCP configuration dhcp_discover() transaction id xid(42021) dhcp_discover: making request dhcp_discover: sendto(DISCOVER, IP_ADDR_BROADCAST, LWIP_IANA_PORT_DHCP_SERVER) ip4_output_if: 0IP header: +-------------------------------+ | 4 | 5 | 0x00 | 336 | (v, hl, tos, len) +-------------------------------+ | 0 |000| 0 | (id, flags, offset) +-------------------------------+ | 255 | 17 | 0xba9d | (ttl, proto, chksum) +-------------------------------+ | 0 | 0 | 0 | 0 | (src) +-------------------------------+ | 255 | 255 | 255 | 255 | (dest) +-------------------------------+ ip4_output_if: call netif->output() ethernet_output: sending packet 000000007df2c010 dhcp_discover: deleting() dhcp_discover: SELECTING dhcp_discover(): set request timeout 2000 msecs ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:28:28:5d:bb:16:9f, type:8899 ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:00:27:0e:0d:74:ba, type:806 etharp_update_arp_entry: 172.24.20.24 - 00:27:0e:0d:74:ba etharp_find_entry: found empty entry 0 etharp_find_entry: no empty entry found and not allowed to recycle etharp_input: incoming ARP request etharp_input: ARP request was not for us. ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:98:90:96:ac:d7:63, type:806 etharp_update_arp_entry: 172.24.20.3 - 98:90:96:ac:d7:63 etharp_find_entry: found empty entry 0 etharp_find_entry: no empty entry found and not allowed to recycle etharp_input: incoming ARP request etharp_input: ARP request was not for us. ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:84:2b:2b:4e:5a:9a, type:806 etharp_update_arp_entry: 172.24.0.1 - 84:2b:2b:4e:5a:9a etharp_find_entry: found empty entry 0 etharp_find_entry: no empty entry found and not allowed to recycle etharp_input: incoming ARP request etharp_input: ARP request was not for us. ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:cc:96:e5:1e:a0:7b, type:800 ip_input: iphdr->dest 0xffff1fac netif->ip_addr 0x101a8c0 (0x0, 0x0, 0xffff1fac) ip4_input: UDP packet to DHCP client port 138 ip4_input: packet not for us. ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:d4:be:d9:9f:5a:b4, type:800 ip_input: iphdr->dest 0xffffffff netif->ip_addr 0x101a8c0 (0x0, 0x0, 0xffffffff) ip4_input: packet accepted on interface 0ip4_input: IP header: +-------------------------------+ | 4 | 5 | 0x00 | 68 | (v, hl, tos, len) +-------------------------------+ | 19472 |000| 0 | (id, flags, offset) +-------------------------------+ | 128 | 17 | 0x2e51 | (ttl, proto, chksum) +-------------------------------+ | 172 | 24 | 20 | 48 | (src) +-------------------------------+ | 255 | 255 | 255 | 255 | (dest) +-------------------------------+ ip4_input: p->len 68 p->tot_len 68 ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:00:0b:ab:2e:fa:51, type:806 etharp_update_arp_entry: 172.24.24.181 - 00:0b:ab:2e:fa:51 etharp_find_entry: found empty entry 0 etharp_find_entry: no empty entry found and not allowed to recycle etharp_input: incoming ARP request etharp_input: ARP request was not for us. ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:98:90:96:ac:d7:63, type:806 etharp_update_arp_entry: 172.24.20.3 - 98:90:96:ac:d7:63 etharp_find_entry: found empty entry 0 etharp_find_entry: no empty entry found and not allowed to recycle etharp_input: incoming ARP request etharp_input: ARP request was not for us. ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:84:2b:2b:4e:5a:9a, type:806 etharp_update_arp_entry: 172.24.0.1 - 84:2b:2b:4e:5a:9a etharp_find_entry: found empty entry 0 etharp_find_entry: no empty entry found and not allowed to recycle etharp_input: incoming ARP request etharp_input: ARP request was not for us. fail Even using ping before DHCP fails: u-boot=> setenv ipaddr 192.168.1.1; ping 192.168.1.146 || echo fail Using ethernet@30be0000 device ip4_route: No route to 192.168.1.146 ip4_route: No route to 192.168.1.146 ip4_route: No route to 192.168.1.146 ip4_route: No route to 192.168.1.146 ip4_route: No route to 192.168.1.146 ip4_route: No route to 192.168.1.146 ip4_route: No route to 192.168.1.146 ip4_route: No route to 192.168.1.146 ip4_route: No route to 192.168.1.146 ip4_route: No route to 192.168.1.146 ping failed; host 192.168.1.146 is not alive fail Best Regards, Tim
