DHCP_EVENT_IP_CHANGE 1039 src/libsystemd-network/sd-dhcp-client.c                         r = DHCP_EVENT_IP_CHANGE;
DHCP_EVENT_IP_CHANGE  534 src/network/networkd-dhcp4.c                 case DHCP_EVENT_IP_CHANGE:
DHCP_EVENT_IP_CHANGE  549 src/network/networkd-dhcp4.c                         if (event == DHCP_EVENT_IP_CHANGE) {