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https://git.rtems.org/rtems-libbsd/
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192 lines
6.6 KiB
C
192 lines
6.6 KiB
C
/*
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* if_pppvar.h - private structures and declarations for PPP.
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*
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* Copyright (c) 1994 The Australian National University.
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* All rights reserved.
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*
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* Permission to use, copy, modify, and distribute this software and its
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* documentation is hereby granted, provided that the above copyright
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* notice appears in all copies. This software is provided without any
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* warranty, express or implied. The Australian National University
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* makes no representations about the suitability of this software for
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* any purpose.
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*
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* IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY
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* PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
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* THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO
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* OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
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* OR MODIFICATIONS.
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*
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* Copyright (c) 1989 Carnegie Mellon University.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that the above copyright notice and this paragraph are
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* duplicated in all such forms and that any documentation,
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* advertising materials, and other materials related to such
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* distribution and use acknowledge that the software was developed
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* by Carnegie Mellon University. The name of the
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* University may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* $FreeBSD: src/sys/net/if_pppvar.h,v 1.26 2006/12/05 18:54:21 ume Exp $
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*/
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#ifndef _NET_IF_PPPVAR_H_
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#define _NET_IF_PPPVAR_H_
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#include <net/if_var.h> /* struct ifnet */
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#include <net/ppp_defs.h> /* struct pppstat */
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#include <rtems/rtems/types.h> /* rtems_id */
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct proc;
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/*
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* Supported network protocols. These values are used for
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* indexing sc_npmode.
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*/
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#define NP_IP 0 /* Internet Protocol */
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#define NUM_NP 1 /* Number of NPs. */
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#define NUM_MBUFQ 64
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/*
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* Structure describing each ppp unit.
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*/
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struct ppp_softc {
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device_t sc_dev;
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struct mtx sc_mtx;
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struct ifnet *sc_ifp; /* network-visible interface */
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u_int sc_flags; /* control/status bits; see if_ppp.h */
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void *sc_devp; /* pointer to device-dep structure */
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void (*sc_start)(struct ppp_softc *); /* start output proc */
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void (*sc_ctlp)(struct ppp_softc *); /* rcvd control pkt */
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void (*sc_relinq)(struct ppp_softc *); /* relinquish ifunit */
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short sc_mru; /* max receive unit */
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pid_t sc_xfer; /* used in transferring unit */
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struct ifqueue sc_rawq; /* received packets */
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struct ifqueue sc_inq; /* queue of input packets for daemon */
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struct ifaltq sc_fastq; /* interactive output packet q */
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struct mbuf *sc_npqueue; /* output packets not to be sent yet */
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struct mbuf **sc_npqtail; /* ptr to last next ptr in npqueue */
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struct pppstat sc_stats; /* count of bytes/pkts sent/rcvd */
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caddr_t sc_bpf; /* hook for BPF */
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enum NPmode sc_npmode[NUM_NP]; /* what to do with each NP */
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struct compressor *sc_xcomp; /* transmit compressor */
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void *sc_xc_state; /* transmit compressor state */
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struct compressor *sc_rcomp; /* receive decompressor */
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void *sc_rc_state; /* receive decompressor state */
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time_t sc_last_sent; /* time (secs) last NP pkt sent */
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time_t sc_last_recv; /* time (secs) last NP pkt rcvd */
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#ifdef PPP_FILTER
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struct bpf_program sc_pass_filt; /* filter for packets to pass */
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struct bpf_program sc_active_filt; /* filter for "non-idle" packets */
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#endif /* PPP_FILTER */
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#ifdef VJC
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struct vjcompress *sc_comp; /* vjc control buffer */
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#endif
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/* Device-dependent part for async lines. */
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ext_accm sc_asyncmap; /* async control character map */
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u_long sc_rasyncmap; /* receive async control char map */
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struct mbuf *sc_outm; /* mbuf chain currently being output */
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struct mbuf *sc_outmc; /* mbuf currently being output */
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struct mbuf *sc_m; /* pointer to input mbuf chain */
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struct mbuf *sc_mc; /* pointer to current input mbuf */
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char *sc_mp; /* ptr to next char in input mbuf */
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short sc_ilen; /* length of input packet so far */
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u_short sc_fcs; /* FCS so far (input) */
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u_short sc_outfcs; /* FCS so far for output packet */
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u_char sc_rawin[16]; /* chars as received */
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int sc_rawin_count; /* # in sc_rawin */
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struct ifqueue sc_freeq; /* free packets */
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short sc_outoff; /* output packet byte offset */
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short sc_outflag; /* output status flag */
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short sc_outlen; /* length of output packet */
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short sc_outfcslen; /* length of output fcs data */
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u_char sc_outfcsbuf[8]; /* output packet fcs buffer */
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u_char *sc_outbuf; /* pointer to output data */
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u_char sc_outchar;
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rtems_id sc_rxtask;
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rtems_id sc_txtask;
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rtems_id sc_pppdtask;
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};
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struct ppp_softc *pppalloc(pid_t pid);
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void pppdealloc(struct ppp_softc *sc);
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int pppoutput(struct ifnet *, struct mbuf *, const struct sockaddr *,
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struct route *);
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int pppioctl(struct ppp_softc *sc, ioctl_command_t cmd, caddr_t data,
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int flag, struct proc *p);
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struct mbuf *ppp_dequeue(struct ppp_softc *sc);
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u_short pppfcs(u_short fcs, u_char *cp, int len);
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void pppallocmbuf(struct ppp_softc *sc, struct mbuf **mp);
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/* define event values */
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#define RX_PACKET RTEMS_EVENT_1
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#define RX_MBUF RTEMS_EVENT_2
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#define RX_EMPTY RTEMS_EVENT_3
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#define TX_PACKET RTEMS_EVENT_1
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#define TX_TRANSMIT RTEMS_EVENT_2
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#define PPPD_EVENT RTEMS_EVENT_31
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/* define out flag values */
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#define SC_TX_BUSY 0x0001
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#define SC_TX_FCS 0x0002
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#define SC_TX_ESCAPE 0x0004
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#define SC_TX_LASTCHAR 0x0008
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#define SC_TX_PENDING 0x0010
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/*
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* Special interface queue functions to exchange mbufs between task and
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* interrupt context via pppinput() and pppstart().
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*/
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static inline void
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if_ppp_enqueue(struct ifqueue *ifq, struct mbuf *m)
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{
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rtems_interrupt_level level;
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rtems_interrupt_disable(level);
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_IF_ENQUEUE(ifq, m);
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rtems_interrupt_enable(level);
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}
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static inline struct mbuf *
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if_ppp_dequeue(struct ifqueue *ifq)
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{
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struct mbuf *m;
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rtems_interrupt_level level;
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rtems_interrupt_disable(level);
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_IF_DEQUEUE(ifq, m);
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rtems_interrupt_enable(level);
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return m;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* _NET_IF_PPPVAR_H_ */
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