SSTATE_FLUSHING  1100 transport-helper.c #define STATE_NEEDS_WRITING(state) ((state) <= SSTATE_FLUSHING)
SSTATE_FLUSHING  1101 transport-helper.c #define STATE_NEEDS_CLOSING(state) ((state) == SSTATE_FLUSHING)
SSTATE_FLUSHING  1158 transport-helper.c 		t->state = SSTATE_FLUSHING;