HelenOS sources

INETCFG_LINK_ADD  277 uspace/lib/inet/src/inetcfg.c 	errno_t rc = async_req_1_0(exch, INETCFG_LINK_ADD, link_id);
INETCFG_LINK_ADD  780 uspace/srv/net/inetsrv/inetcfg.c 		case INETCFG_LINK_ADD:
HelenOS homepage, sources at GitHub