HelenOS sources

NIC_GET_PAUSE     512 uspace/lib/drv/generic/remote_nic.c 	    NIC_GET_PAUSE, &_we_send, &_we_receive, &_pause);
NIC_GET_PAUSE    2507 uspace/lib/drv/generic/remote_nic.c 	[NIC_GET_PAUSE] = remote_nic_get_pause,
HelenOS homepage, sources at GitHub