IPv6 on Wi-Fi (MTWJ-887)

[ahthamrin]

Checklist

• Checked the issue tracker for similar issues to ensure this is not a duplicate
• Read the documentation to confirm the issue is not addressed there and your configuration is set correctly
• Tested with the latest version to ensure the issue hasn't been fixed

How often does this bug occurs?

always

Expected behavior

I wanted to run iperf using IPv6, but the ESP32 only receives IPv4 address from the DHCP server.

Actual behavior (suspected bug)

The bug is in esp-qa/wifi-cmd.
It is because wifi_init.c line no 76 used NULL argument.
Instead it should use g_netif_sta like this.

ESP_ERROR_CHECK(esp_event_handler_register(WIFI_EVENT, WIFI_EVENT_STA_CONNECTED, &wifi_cmd_handler_sta_connected, g_netif_sta));

I managed to run iperf using IPv6 as shown in the terminal output.
Note: I commented out the #if surrounding line 78 in wifi_handler.c

I haven't check other handlers.
Kindly fix this and related bugs.

Error logs or terminal output

I (21550) WIFI: IP_EVENT_GOT_IP6: Interface "sta" address: fe80:0000:0000:0000:7e2c:67ff:fe55:VVVV, type: 2
I (21561) WIFI: - IPv6 address: fe80:0000:0000:0000:7e2c:67ff:fe55:VVVV, type: 2
I (22549) WIFI: IP_EVENT_GOT_IP6: Interface "sta" address: 2XXX:XXXX:XXX:3d00:7e2c:67ff:fe55:d950, type: 1
I (22560) WIFI: - IPv6 address: 2XXX:XXXX:XXX:3d00:7e2c:67ff:fe55:VVVV, type: 1

iperf> iperf -V -c 2YYY:YYYY:YYYY:47bd:5400:1ff:fe7e:38a5 -u -b 40
I (362645) IPERF: mode=udp-client sip=localhost:5001, dip=2YYY:YYYY:YYYY:47bd:5400:1ff:fe7e:38a5:5001, interval=3, time=30
I (362646) iperf: Socket created, sending to 2YYY:YYYY:YYYY:47bd:5400:1ff:fe7e:38a5:5001

Interval       Bandwidth
 0.0- 3.0 sec  35.67 Mbits/sec
 3.0- 6.0 sec  37.03 Mbits/sec
 6.0- 9.0 sec  37.24 Mbits/sec
 9.0-12.0 sec  34.42 Mbits/sec
12.0-15.0 sec  36.60 Mbits/sec
15.0-18.0 sec  36.20 Mbits/sec
18.0-21.0 sec  36.01 Mbits/sec
21.0-24.0 sec  37.08 Mbits/sec
24.0-27.0 sec  36.19 Mbits/sec
27.0-30.0 sec  35.72 Mbits/sec
 0.0-30.0 sec  36.22 Mbits/sec
I (392658) iperf: UDP Socket client is closed
I (392658) iperf: iperf exit

Steps to reproduce the behavior

1. update the qa-esp/wifi-cmd to 0.2.5 esp-qa/wifi-cmd
2. enable IPV6 SLAAC on the menuconfig
3. build, flash, monitor

Project release version

latest

System architecture

ARM 64-bit (Apple M1/M2, Raspberry Pi 4/5)

Operating system

MacOS

Operating system version

15.7.1

Shell

ZSH

Additional context

No response

[ydhub]

Thanks for your report. published wifi-cmd v0.2.6 to fix this issue. BTW, wifi_cmd_handler_ap_staconnected is a weak function, which means you can override it in application for workaround.

Fixed with:

diff --git a/src/wifi_handler.c b/src/wifi_handler.c
index 597e327..2870fef 100644
--- a/src/wifi_handler.c
+++ b/src/wifi_handler.c
@@ -66,7 +66,7 @@ void wifi_cmd_default_handler_ap_stadisconnected(void *arg, esp_event_base_t eve
 
 }
 
-void wifi_cmd_default_handler_sta_connected(void *arg, esp_event_base_t event_base, int32_t event_id, void *event_data)
+void wifi_cmd_default_handler_sta_connected(void *esp_netif, esp_event_base_t event_base, int32_t event_id, void *event_data)
 {
     g_is_sta_wifi_connected = true;
     ESP_LOGI(APP_TAG, "WIFI_EVENT_STA_CONNECTED!");
@@ -74,9 +74,9 @@ void wifi_cmd_default_handler_sta_connected(void *arg, esp_event_base_t event_ba
     wifi_event_sta_connected_t *event = (wifi_event_sta_connected_t *)event_data;
     ESP_LOGI(APP_TAG, "STA_CONNECTED_AUTH:%d", event->authmode);
 #endif
-#if WIFI_CMD_IPV6_ENABLED && !CONFIG_WIFI_CMD_NO_LWIP
-    esp_netif_create_ip6_linklocal(g_netif_sta);
-#endif // WIFI_CMD_IPV6_ENABLED && !CONFIG_WIFI_CMD_NO_LWIP
+#if CONFIG_EXAMPLE_CONNECT_IPV6
+    esp_netif_create_ip6_linklocal(esp_netif);
+#endif // CONFIG_EXAMPLE_CONNECT_IPV6
 }

and test results:

I (371895) WIFI: WIFI_EVENT_STA_CONNECTED!
I (371905) WIFI: STA_CONNECTED_AUTH:3
I (372005) wifi:[ADDBA]RX addba response, status:0, tid:0/tb:1(0xa1), bufsize:32, batimeout:0, txa_wnd:32
I (372115) wifi:[ADDBA]RX addba response, status:0, tid:7/tb:1(0xa1), bufsize:32, batimeout:0, txa_wnd:32
I (372525) wifi:[ADDBA]RX addba response, status:0, tid:5/tb:1(0xa1), bufsize:32, batimeout:0, txa_wnd:32
I (373415) WIFI: IP_EVENT_GOT_IP6: Interface "sta" address: fe80:0000:0000:0000:32ed:XXXX:fee4:XXXX, type: 2
I (373415) WIFI: - IPv6 address: fe80:0000:0000:0000:32ed:XXXX:fee4:XXXX, type: 2
W (375845) wifi:<ba-add>idx:0, ifx:0, tid:0, TAHI:0x100bbf4, TALO:0xcd68b6e0, (ssn:3, win:64, cur_ssn:3), CONF:0xc0000001
I (376935) esp_netif_handlers: sta ip: 192.168.5.3, mask: 255.255.255.0, gw: 192.168.5.1
I (376935) WIFI: IP_EVENT_STA_GOT_IP: Interface "sta" address: 192.168.5.3
I (376945) WIFI: - IPv4 address: 192.168.5.3,
I (378415) WIFI: IP_EVENT_GOT_IP6: Interface "sta" address: 2001:0000:0000:0000:32ed:XXXX:fee4:XXXX, type: 1
I (378415) WIFI: - IPv6 address: 2001:0000:0000:0000:32ed:XXXX:fee4:c780, type: 1

[ahthamrin]

Thank you for your prompt response!

I will inform my colleagues that this code is now ready for IPv6.