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https://git.rtems.org/rtems-libbsd/
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2ce166bd37
The pppstart expected that a driver write would somehow magically process all data passed to the write function. Because ppp disables all buffering that originally has been in termios, that assumption is not true for all but polled drivers. With this patch, the pppstart now gets and processes the feedback that is returned from the driver via rtems_termios_dequeue_characters. Fixes #4494
193 lines
6.7 KiB
C
193 lines
6.7 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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bool sc_outoff_update; /* outoff needs update in pppstart */
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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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