This is if_ppp.h in view mode; [Download] [Up]
/*
* if_ppp.h - Point-to-Point Protocol definitions.
*
* Copyright (c) 1989 Carnegie Mellon University.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by Carnegie Mellon University. The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
/* Portions Copyright (C) 1990 Brad K. Clements (streams support)
*/
/*
* Standard PPP header.
*/
struct ppp_header {
u_char ph_address; /* Address Field */
u_char ph_control; /* Control Field */
u_short ph_protocol; /* Protocol Field */
};
#define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */
#define PPP_UI 0x03 /* Unnumbered Information */
#define PPP_FLAG 0x7e /* Flag Sequence */
#define PPP_ESCAPE 0x7d /* Asynchronous Control Escape */
#define PPP_TRANS 0x20 /* Asynchronous transparency modifier */
/*
* Protocol types.
*/
#define PPP_IP 0x21 /* Internet Protocol */
#define PPP_XNS 0x25 /* Xerox NS */
#define PPP_VJC_COMP 0x2d /* VJ compressed TCP */
#define PPP_VJC_UNCOMP 0x2f /* VJ uncompressed TCP */
/*
* Important FCS values.
*/
#define PPP_INITFCS 0xffff /* Initial FCS value */
#define PPP_GOODFCS 0xf0b8 /* Good final FCS value */
#define PPP_FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff])
#define PPP_MTU 1500 /* Default MTU (size of Info field) */
#define PPP_HIWAT 1000 /* Don't start a new packet if HIWAT on queue */
#define CLISTRESERVE 1000 /* Can't let clists get too low */
#define QUEUE_SIZE 40
#define QUEUE_LOW 10
#define QUEUE_HIGH 20
struct nb_queue
{
int head;
int tail;
netbuf_t queue[QUEUE_SIZE];
}
;
struct ppp_softc {
struct ifnet* sc_if; /* network-visible interface */
short sc_flags; /* see below */
struct tty *sc_ttyp; /* pointer to tty structure */
u_short sc_fcs; /* FCS so far */
u_long sc_asyncmap; /* async control character map */
struct nb_queue inq; /* reserve netbufs */
netbuf_t tin_nb; /* Current TTY input netbuf */
struct nb_queue sndq;
netbuf_t in_nb; /* Input available to user ppp */
#ifdef VJC
struct slcompress comp;
#endif
};
/* flags */
#define SC_ESCAPED 0x0001 /* saw a PPP_ESCAPE */
#define SC_FLUSH 0x0002 /* flush input until next PPP_FLAG */
#define t_sc T_LINEP
#ifdef STREAMS
/* defines for streams modules */
#define IF_INPUT_ERROR 0xe1
#define IF_OUTPUT_ERROR 0xe2
#define ALLOCBSIZE 64 /* how big of a buffer block to allocate for each chunk of the input chain */
#endif
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.