home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Turnbull China Bikeride
/
Turnbull China Bikeride - Disc 1.iso
/
DEMON
/
RISCOS2
/
TCP_131S.ARC
/
h
/
NRS
< prev
next >
Wrap
Text File
|
1992-02-22
|
2KB
|
36 lines
/* 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 **);