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- /* SLIP definitions */
- #define NRS_ALLOC 40 /* Receiver allocation increment */
-
- #define STX 0x02 /* frame start */
- #define ETX 0x03 /* frame end */
- #define DLE 0x10 /* data link escape */
- #define NUL 0x0 /* null character */
-
- /* packet unstuffing state machine */
- #define NRS_INTER 0 /* in between packets */
- #define NRS_INPACK 1 /* we've seen STX, and are in a the packet */
- #define NRS_ESCAPE 2 /* we've seen a DLE while in NRS_INPACK */
- #define NRS_CSUM 3 /* we've seen an ETX, and are waiting for the checksum */
-
- /* net/rom serial protocol control structure */
- struct nrs {
- struct mbuf *sndq; /* Encapsulated packets awaiting transmission */
- int16 sndcnt; /* Number of datagrams on queue */
- char state; /* Receiver State control flag */
- unsigned char csum; /* Accumulating checksum */
- struct mbuf *rbp; /* Head of mbuf chain being filled */
- struct mbuf *rbp1; /* Pointer to mbuf currently being written */
- char *rcp; /* Write pointer */
- int16 rcnt; /* Length of mbuf chain */
- struct mbuf *tbp; /* Transmit mbuf being sent */
- long errors; /* Checksum errors detected */
- long packets ; /* Number of packets received successfully */
- struct interface *iface ; /* Associated interface structure */
- };
-
- extern struct nrs nrs[];
-
- int nrs_raw(struct interface *, struct mbuf *);
- void nrs_recv(struct interface *);
- int donrstat(int, char **);
-