93 struct ppp_softc {  struct
98 	void	(*sc_start)(struct ppp_softc *);	/* start output proc */  argument
99 	void	(*sc_ctlp)(struct ppp_softc *); /* rcvd control pkt */  argument
100 	void	(*sc_relinq)(struct ppp_softc *); /* relinquish ifunit */  argument
101 	struct	callout sc_timo_ch;	/* timeout callout */
102 	uint16_t sc_mru;		/* max receive unit */
103 	pid_t	sc_xfer;		/* used in transferring unit */
104 	struct	ifqueue sc_rawq;	/* received packets */
105 	struct	ifqueue sc_inq;		/* queue of input packets for daemon */
106 	struct	ifqueue sc_fastq;	/* interactive output packet q */
107 	struct	mbuf *sc_togo;		/* output packet ready to go */
108 	struct	mbuf *sc_npqueue;	/* output packets not to be sent yet */
109 	struct	mbuf **sc_npqtail;	/* ptr to last next ptr in npqueue */
110 	struct	pppstat sc_stats;	/* count of bytes/pkts sent/rcvd */
111 	enum	NPmode sc_npmode[NUM_NP]; /* what to do with each NP */
112 	struct	compressor *sc_xcomp;	/* transmit compressor */
113 	void	*sc_xc_state;		/* transmit compressor state */
114 	struct	compressor *sc_rcomp;	/* receive decompressor */
115 	void	*sc_rc_state;		/* receive decompressor state */
116 	time_t	sc_last_sent;		/* time (secs) last NP pkt sent */
117 	time_t	sc_last_recv;		/* time (secs) last NP pkt rcvd */
118 	void	*sc_si;			/* software interrupt handle */
121 	struct	bpf_program sc_pass_filt_in;
122 	struct	bpf_program sc_pass_filt_out;
125 	struct	bpf_program sc_active_filt_in;
126 	struct	bpf_program sc_active_filt_out;
150 	LIST_ENTRY(ppp_softc) sc_iflist;  argument