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7358f4bb52
This fixes the panic that occurs when using ppp(4) Reported and tested by: Yann Berthier (yb at sainte-barbe dot org)
112 lines
4.9 KiB
C
112 lines
4.9 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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* $FreeBSD$
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*/
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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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/*
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* Structure describing each ppp unit.
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*/
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struct ppp_softc {
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struct ifnet sc_if; /* network-visible interface */
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/*hi*/ u_int sc_flags; /* control/status bits; see if_ppp.h */
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struct callout_handle sc_ch; /* Used for scheduling timeouts */
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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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void (*sc_setmtu)(struct ppp_softc *); /* set mtu */
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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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/*hi*/ struct ifqueue sc_rawq; /* received packets */
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/*net*/ struct ifqueue sc_inq; /* queue of input packets for daemon */
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/*net*/ struct ifqueue 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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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 slcompress *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_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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LIST_ENTRY(ppp_softc) sc_list;
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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 pppioctl(struct ppp_softc *sc, u_long cmd, caddr_t data, int flag,
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struct thread *td);
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int pppoutput(struct ifnet *ifp, struct mbuf *m0, struct sockaddr *dst,
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struct rtentry *rtp);
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void ppp_restart(struct ppp_softc *sc);
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void ppppktin(struct ppp_softc *sc, struct mbuf *m, int lost);
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struct mbuf *ppp_dequeue(struct ppp_softc *sc);
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struct ppp_softc *ppp_for_tty(struct tty *);
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