[WiFiGUY512]

When ubusd drops a client (ubusd restarting, or a message over UBUS_MAX_MSGLEN), libubus calls the connection's connection_lost. The ubus module keeps libubus' default there, both for the shared connection of the module-level functions and for connections made with connect(). That default ends the uloop only while the socket is still registered, and uloop's epoll backend unregisters it on the hangup before the callback runs. So nothing happens: the connection stays dead, and everything published on it is gone until the process restarts.

On OpenWrt this is how these objects disappear after a ubusd restart, while netifd's own C objects come back:

• netifd's network.wireless, which wireless.uc publishes on the shared connection;
• the hostapd and wpa_supplicant objects, which hostapd.uc and wpa_supplicant.uc publish on connect() connections.

There are two commits.

ubus: reconnect a connection when ubusd drops it reconnects instead, retrying every second as ubus_auto_connect() does. ubus_reconnect() registers the connection's objects again. It keeps the socket path given to connect() for that. The pending reconnect is cancelled in uc_ubus_conn_teardown(), which both disconnect() and the resource's free run.

ubus: register listeners again after a reconnect. ubus_reconnect() adds a listener's object again, but not its event pattern registration with ubusd. This commit keeps each connection's listeners with their patterns and registers them again once reconnected. A listener also leaves that list when it is freed (it gets a free callback), so the connection never walks a freed listener, whichever of the two the VM frees first.

Tested on an Arista W-118 (ipq40xx, musl) with OpenWrt main of 2026-11-01:

• With this branch's lib/ubus.c, built for the unit and loaded in place of the stock module, killall ubusd brought back network.wireless (answering status), hostapd and wpa_supplicant on the same PIDs.
• A script listening on b36.* heard an event sent before the restart and one sent after it.
• OpenWrt's ucode is dfc64d4, whose headers are the same as master's.
• An earlier version of these commits has run in OpenWrt package patches on five APs since 2026-10-25.
• The file compiles clean with the project's -Wall -Wextra -Werror.

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