net: ip: dhcpv4: remove address on interface down (1ef0ec55) · Commits · Wenxi XU / zephyr

Any received address is no longer valid once the interface goes down. Leaving the address assigned results in the L4 interface transitioning through the following on reconnection: UP: Interface is connected DOWN: Old address is removed by DHCP UP: New address is re-added by DHCP Signed-off-by:

Jordan Yates <jordan.yates@data61.csiro.au>

subsys/net/ip/dhcpv4.c

+4 −0

Changes for subsys/net/ip/dhcpv4.c: 4 added lines, 0 removed lines.
Original line number	Diff line number	Diff line
		@@ -1163,6 +1163,10 @@ static void dhcpv4_iface_event_handler(struct net_mgmt_event_callback *cb,
		iface->config.dhcpv4.state = NET_DHCPV4_RENEWING;
		NET_DBG("enter state=%s", net_dhcpv4_state_name(
		iface->config.dhcpv4.state));
		/* Remove any bound address as interface is gone */
		if (!net_if_ipv4_addr_rm(iface, &iface->config.dhcpv4.requested_ip)) {
		NET_DBG("Failed to remove addr from iface");
		}
		}
		} else if (mgmt_event == NET_EVENT_IF_UP) {
		NET_DBG("Interface %p coming up", iface);

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