SC_CCP_UP
#define SC_FLAG_BITS (SC_NO_TCP_CCID|SC_CCP_OPEN|SC_CCP_UP|SC_LOOP_TRAFFIC \
if (len > 0 && (ppp->flags & SC_CCP_UP)) {
if (!(ppp->flags & SC_CCP_UP) && (ppp->flags & SC_MUST_COMP)) {
if ((ppp->flags & (SC_CCP_OPEN | SC_CCP_UP)) != SC_CCP_OPEN)
if ((ppp->flags & SC_CCP_UP) == 0)
ppp->flags &= ~(SC_CCP_OPEN | SC_CCP_UP);