+++ /dev/null
-/* $NetBSD: if_ppp.c,v 1.46 1998/08/02 15:09:50 sommerfe Exp $ */
-/* $Id: if_ppp.c,v 1.6 2002/12/06 12:03:44 paulus Exp $ */
-
-/*
- * if_ppp.c - Point-to-Point Protocol (PPP) Asynchronous driver.
- *
- * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The name "Carnegie Mellon University" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For permission or any legal
- * details, please contact
- * Office of Technology Transfer
- * Carnegie Mellon University
- * 5000 Forbes Avenue
- * Pittsburgh, PA 15213-3890
- * (412) 268-4387, fax: (412) 268-7395
- * tech-transfer@andrew.cmu.edu
- *
- * 4. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by Computing Services
- * at Carnegie Mellon University (http://www.cmu.edu/computing/)."
- *
- * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
- * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
- * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
- * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
- * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
- * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- *
- * Drew D. Perkins
- * Carnegie Mellon University
- * 4910 Forbes Ave.
- * Pittsburgh, PA 15213
- * (412) 268-8576
- * ddp@andrew.cmu.edu
- *
- * Based on:
- * @(#)if_sl.c 7.6.1.2 (Berkeley) 2/15/89
- *
- * Copyright (c) 1987 Regents of the University of California.
- * 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 the University of California, Berkeley. 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.
- *
- * Serial Line interface
- *
- * Rick Adams
- * Center for Seismic Studies
- * 1300 N 17th Street, Suite 1450
- * Arlington, Virginia 22209
- * (703)276-7900
- * rick@seismo.ARPA
- * seismo!rick
- *
- * Pounded on heavily by Chris Torek (chris@mimsy.umd.edu, umcp-cs!chris).
- * Converted to 4.3BSD Beta by Chris Torek.
- * Other changes made at Berkeley, based in part on code by Kirk Smith.
- *
- * Converted to 4.3BSD+ 386BSD by Brad Parker (brad@cayman.com)
- * Added VJ tcp header compression; more unified ioctls
- *
- * Extensively modified by Paul Mackerras (paulus@cs.anu.edu.au).
- * Cleaned up a lot of the mbuf-related code to fix bugs that
- * caused system crashes and packet corruption. Changed pppstart
- * so that it doesn't just give up with a collision if the whole
- * packet doesn't fit in the output ring buffer.
- *
- * Added priority queueing for interactive IP packets, following
- * the model of if_sl.c, plus hooks for bpf.
- * Paul Mackerras (paulus@cs.anu.edu.au).
- */
-
-/* from if_sl.c,v 1.11 84/10/04 12:54:47 rick Exp */
-/* from NetBSD: if_ppp.c,v 1.15.2.2 1994/07/28 05:17:58 cgd Exp */
-
-#include "ppp.h"
-#if NPPP > 0
-
-#define VJC
-#define PPP_COMPRESS
-
-#include <sys/param.h>
-
-#ifdef __NetBSD_Version__ /* Post 1.3 */
-#include "opt_inet.h"
-#include "opt_gateway.h"
-#endif
-
-#include <sys/proc.h>
-#include <sys/mbuf.h>
-#include <sys/socket.h>
-#include <sys/ioctl.h>
-#include <sys/kernel.h>
-#include <sys/systm.h>
-#include <sys/time.h>
-#include <sys/malloc.h>
-
-#include <net/if.h>
-#include <net/if_types.h>
-#include <net/netisr.h>
-#include <net/route.h>
-#ifdef PPP_FILTER
-#include <net/bpf.h>
-#endif
-
-#ifdef INET
-#include <netinet/in.h>
-#include <netinet/in_systm.h>
-#include <netinet/in_var.h>
-#include <netinet/ip.h>
-#endif
-
-#include "bpfilter.h"
-#if NBPFILTER > 0
-#include <sys/time.h>
-#include <net/bpf.h>
-#endif
-
-#ifdef VJC
-#include <net/slcompress.h>
-#endif
-
-#include <net/ppp_defs.h>
-#include <net/if_ppp.h>
-#include <net/if_pppvar.h>
-#include <machine/cpu.h>
-
-#ifdef PPP_COMPRESS
-#define PACKETPTR struct mbuf *
-#include <net/ppp-comp.h>
-#endif
-
-static int pppsioctl __P((struct ifnet *, u_long, caddr_t));
-static void ppp_requeue __P((struct ppp_softc *));
-static void ppp_ccp __P((struct ppp_softc *, struct mbuf *m, int rcvd));
-static void ppp_ccp_closed __P((struct ppp_softc *));
-static void ppp_inproc __P((struct ppp_softc *, struct mbuf *));
-static void pppdumpm __P((struct mbuf *m0));
-
-/*
- * Some useful mbuf macros not in mbuf.h.
- */
-#define M_IS_CLUSTER(m) ((m)->m_flags & M_EXT)
-
-#define M_DATASTART(m) \
- (M_IS_CLUSTER(m) ? (m)->m_ext.ext_buf : \
- (m)->m_flags & M_PKTHDR ? (m)->m_pktdat : (m)->m_dat)
-
-#define M_DATASIZE(m) \
- (M_IS_CLUSTER(m) ? (m)->m_ext.ext_size : \
- (m)->m_flags & M_PKTHDR ? MHLEN: MLEN)
-
-/*
- * We steal two bits in the mbuf m_flags, to mark high-priority packets
- * for output, and received packets following lost/corrupted packets.
- */
-#define M_HIGHPRI 0x2000 /* output packet for sc_fastq */
-#define M_ERRMARK 0x4000 /* steal a bit in mbuf m_flags */
-
-
-#ifdef PPP_COMPRESS
-/*
- * List of compressors we know about.
- * We leave some space so maybe we can modload compressors.
- */
-
-extern struct compressor ppp_bsd_compress;
-extern struct compressor ppp_deflate, ppp_deflate_draft;
-
-struct compressor *ppp_compressors[8] = {
-#if DO_BSD_COMPRESS && defined(PPP_BSDCOMP)
- &ppp_bsd_compress,
-#endif
-#if DO_DEFLATE && defined(PPP_DEFLATE)
- &ppp_deflate,
- &ppp_deflate_draft,
-#endif
- NULL
-};
-#endif /* PPP_COMPRESS */
-
-
-/*
- * Called from boot code to establish ppp interfaces.
- */
-void
-pppattach()
-{
- register struct ppp_softc *sc;
- register int i = 0;
-
- for (sc = ppp_softc; i < NPPP; sc++) {
- sc->sc_unit = i; /* XXX */
- sprintf(sc->sc_if.if_xname, "ppp%d", i++);
- sc->sc_if.if_softc = sc;
- sc->sc_if.if_mtu = PPP_MTU;
- sc->sc_if.if_flags = IFF_POINTOPOINT | IFF_MULTICAST;
- sc->sc_if.if_type = IFT_PPP;
- sc->sc_if.if_hdrlen = PPP_HDRLEN;
- sc->sc_if.if_ioctl = pppsioctl;
- sc->sc_if.if_output = pppoutput;
- sc->sc_if.if_snd.ifq_maxlen = IFQ_MAXLEN;
- sc->sc_inq.ifq_maxlen = IFQ_MAXLEN;
- sc->sc_fastq.ifq_maxlen = IFQ_MAXLEN;
- sc->sc_rawq.ifq_maxlen = IFQ_MAXLEN;
- if_attach(&sc->sc_if);
-#if NBPFILTER > 0
- bpfattach(&sc->sc_bpf, &sc->sc_if, DLT_PPP, PPP_HDRLEN);
-#endif
- }
-}
-
-/*
- * Allocate a ppp interface unit and initialize it.
- */
-struct ppp_softc *
-pppalloc(pid)
- pid_t pid;
-{
- int nppp, i;
- struct ppp_softc *sc;
-
- for (nppp = 0, sc = ppp_softc; nppp < NPPP; nppp++, sc++)
- if (sc->sc_xfer == pid) {
- sc->sc_xfer = 0;
- return sc;
- }
- for (nppp = 0, sc = ppp_softc; nppp < NPPP; nppp++, sc++)
- if (sc->sc_devp == NULL)
- break;
- if (nppp >= NPPP)
- return NULL;
-
- sc->sc_flags = 0;
- sc->sc_mru = PPP_MRU;
- sc->sc_relinq = NULL;
- bzero((char *)&sc->sc_stats, sizeof(sc->sc_stats));
-#ifdef VJC
- MALLOC(sc->sc_comp, struct slcompress *, sizeof(struct slcompress),
- M_DEVBUF, M_NOWAIT);
- if (sc->sc_comp)
- sl_compress_init(sc->sc_comp);
-#endif
-#ifdef PPP_COMPRESS
- sc->sc_xc_state = NULL;
- sc->sc_rc_state = NULL;
-#endif /* PPP_COMPRESS */
- for (i = 0; i < NUM_NP; ++i)
- sc->sc_npmode[i] = NPMODE_ERROR;
- sc->sc_npqueue = NULL;
- sc->sc_npqtail = &sc->sc_npqueue;
- sc->sc_last_sent = sc->sc_last_recv = time.tv_sec;
-
- return sc;
-}
-
-/*
- * Deallocate a ppp unit. Must be called at splsoftnet or higher.
- */
-void
-pppdealloc(sc)
- struct ppp_softc *sc;
-{
- struct mbuf *m;
-
- if_down(&sc->sc_if);
- sc->sc_if.if_flags &= ~(IFF_UP|IFF_RUNNING);
- sc->sc_devp = NULL;
- sc->sc_xfer = 0;
- for (;;) {
- IF_DEQUEUE(&sc->sc_rawq, m);
- if (m == NULL)
- break;
- m_freem(m);
- }
- for (;;) {
- IF_DEQUEUE(&sc->sc_inq, m);
- if (m == NULL)
- break;
- m_freem(m);
- }
- for (;;) {
- IF_DEQUEUE(&sc->sc_fastq, m);
- if (m == NULL)
- break;
- m_freem(m);
- }
- while ((m = sc->sc_npqueue) != NULL) {
- sc->sc_npqueue = m->m_nextpkt;
- m_freem(m);
- }
- if (sc->sc_togo != NULL) {
- m_freem(sc->sc_togo);
- sc->sc_togo = NULL;
- }
-#ifdef PPP_COMPRESS
- ppp_ccp_closed(sc);
- sc->sc_xc_state = NULL;
- sc->sc_rc_state = NULL;
-#endif /* PPP_COMPRESS */
-#ifdef PPP_FILTER
- if (sc->sc_pass_filt.bf_insns != 0) {
- FREE(sc->sc_pass_filt.bf_insns, M_DEVBUF);
- sc->sc_pass_filt.bf_insns = 0;
- sc->sc_pass_filt.bf_len = 0;
- }
- if (sc->sc_active_filt.bf_insns != 0) {
- FREE(sc->sc_active_filt.bf_insns, M_DEVBUF);
- sc->sc_active_filt.bf_insns = 0;
- sc->sc_active_filt.bf_len = 0;
- }
-#endif /* PPP_FILTER */
-#ifdef VJC
- if (sc->sc_comp != 0) {
- FREE(sc->sc_comp, M_DEVBUF);
- sc->sc_comp = 0;
- }
-#endif
-}
-
-/*
- * Ioctl routine for generic ppp devices.
- */
-int
-pppioctl(sc, cmd, data, flag, p)
- struct ppp_softc *sc;
- u_long cmd;
- caddr_t data;
- int flag;
- struct proc *p;
-{
- int s, error, flags, mru, nb, npx;
- struct ppp_option_data *odp;
- struct compressor **cp;
- struct npioctl *npi;
- time_t t;
-#ifdef PPP_FILTER
- struct bpf_program *bp, *nbp;
- struct bpf_insn *newcode, *oldcode;
- int newcodelen;
-#endif /* PPP_FILTER */
-#ifdef PPP_COMPRESS
- u_char ccp_option[CCP_MAX_OPTION_LENGTH];
-#endif
-
- switch (cmd) {
- case FIONREAD:
- *(int *)data = sc->sc_inq.ifq_len;
- break;
-
- case PPPIOCGUNIT:
- *(int *)data = sc->sc_unit; /* XXX */
- break;
-
- case PPPIOCGFLAGS:
- *(u_int *)data = sc->sc_flags;
- break;
-
- case PPPIOCSFLAGS:
- if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
- return (error);
- flags = *(int *)data & SC_MASK;
- s = splsoftnet();
-#ifdef PPP_COMPRESS
- if (sc->sc_flags & SC_CCP_OPEN && !(flags & SC_CCP_OPEN))
- ppp_ccp_closed(sc);
-#endif
- splimp();
- sc->sc_flags = (sc->sc_flags & ~SC_MASK) | flags;
- splx(s);
- break;
-
- case PPPIOCSMRU:
- if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
- return (error);
- mru = *(int *)data;
- if (mru >= PPP_MRU && mru <= PPP_MAXMRU)
- sc->sc_mru = mru;
- break;
-
- case PPPIOCGMRU:
- *(int *)data = sc->sc_mru;
- break;
-
-#ifdef VJC
- case PPPIOCSMAXCID:
- if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
- return (error);
- if (sc->sc_comp) {
- s = splsoftnet();
- sl_compress_setup(sc->sc_comp, *(int *)data);
- splx(s);
- }
- break;
-#endif
-
- case PPPIOCXFERUNIT:
- if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
- return (error);
- sc->sc_xfer = p->p_pid;
- break;
-
-#ifdef PPP_COMPRESS
- case PPPIOCSCOMPRESS:
- if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
- return (error);
- odp = (struct ppp_option_data *) data;
- nb = odp->length;
- if (nb > sizeof(ccp_option))
- nb = sizeof(ccp_option);
- if ((error = copyin(odp->ptr, ccp_option, nb)) != 0)
- return (error);
- if (ccp_option[1] < 2) /* preliminary check on the length byte */
- return (EINVAL);
- for (cp = ppp_compressors; *cp != NULL; ++cp)
- if ((*cp)->compress_proto == ccp_option[0]) {
- /*
- * Found a handler for the protocol - try to allocate
- * a compressor or decompressor.
- */
- error = 0;
- if (odp->transmit) {
- s = splsoftnet();
- if (sc->sc_xc_state != NULL)
- (*sc->sc_xcomp->comp_free)(sc->sc_xc_state);
- sc->sc_xcomp = *cp;
- sc->sc_xc_state = (*cp)->comp_alloc(ccp_option, nb);
- if (sc->sc_xc_state == NULL) {
- if (sc->sc_flags & SC_DEBUG)
- printf("%s: comp_alloc failed\n",
- sc->sc_if.if_xname);
- error = ENOBUFS;
- }
- splimp();
- sc->sc_flags &= ~SC_COMP_RUN;
- splx(s);
- } else {
- s = splsoftnet();
- if (sc->sc_rc_state != NULL)
- (*sc->sc_rcomp->decomp_free)(sc->sc_rc_state);
- sc->sc_rcomp = *cp;
- sc->sc_rc_state = (*cp)->decomp_alloc(ccp_option, nb);
- if (sc->sc_rc_state == NULL) {
- if (sc->sc_flags & SC_DEBUG)
- printf("%s: decomp_alloc failed\n",
- sc->sc_if.if_xname);
- error = ENOBUFS;
- }
- splimp();
- sc->sc_flags &= ~SC_DECOMP_RUN;
- splx(s);
- }
- return (error);
- }
- if (sc->sc_flags & SC_DEBUG)
- printf("%s: no compressor for [%x %x %x], %x\n",
- sc->sc_if.if_xname, ccp_option[0], ccp_option[1],
- ccp_option[2], nb);
- return (EINVAL); /* no handler found */
-#endif /* PPP_COMPRESS */
-
- case PPPIOCGNPMODE:
- case PPPIOCSNPMODE:
- npi = (struct npioctl *) data;
- switch (npi->protocol) {
- case PPP_IP:
- npx = NP_IP;
- break;
- default:
- return EINVAL;
- }
- if (cmd == PPPIOCGNPMODE) {
- npi->mode = sc->sc_npmode[npx];
- } else {
- if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
- return (error);
- if (npi->mode != sc->sc_npmode[npx]) {
- s = splimp();
- sc->sc_npmode[npx] = npi->mode;
- if (npi->mode != NPMODE_QUEUE) {
- ppp_requeue(sc);
- ppp_restart(sc);
- }
- splx(s);
- }
- }
- break;
-
- case PPPIOCGIDLE:
- s = splsoftnet();
- t = time.tv_sec;
- ((struct ppp_idle *)data)->xmit_idle = t - sc->sc_last_sent;
- ((struct ppp_idle *)data)->recv_idle = t - sc->sc_last_recv;
- splx(s);
- break;
-
-#ifdef PPP_FILTER
- case PPPIOCSPASS:
- case PPPIOCSACTIVE:
- nbp = (struct bpf_program *) data;
- if ((unsigned) nbp->bf_len > BPF_MAXINSNS)
- return EINVAL;
- newcodelen = nbp->bf_len * sizeof(struct bpf_insn);
- if (newcodelen != 0) {
- MALLOC(newcode, struct bpf_insn *, newcodelen, M_DEVBUF, M_WAITOK);
- if (newcode == 0) {
- return EINVAL; /* or sumpin */
- }
- if ((error = copyin((caddr_t)nbp->bf_insns, (caddr_t)newcode,
- newcodelen)) != 0) {
- FREE(newcode, M_DEVBUF);
- return error;
- }
- if (!bpf_validate(newcode, nbp->bf_len)) {
- FREE(newcode, M_DEVBUF);
- return EINVAL;
- }
- } else
- newcode = 0;
- bp = (cmd == PPPIOCSPASS)? &sc->sc_pass_filt: &sc->sc_active_filt;
- oldcode = bp->bf_insns;
- s = splimp();
- bp->bf_len = nbp->bf_len;
- bp->bf_insns = newcode;
- splx(s);
- if (oldcode != 0)
- FREE(oldcode, M_DEVBUF);
- break;
-#endif
-
- default:
- return (-1);
- }
- return (0);
-}
-
-/*
- * Process an ioctl request to the ppp network interface.
- */
-static int
-pppsioctl(ifp, cmd, data)
- register struct ifnet *ifp;
- u_long cmd;
- caddr_t data;
-{
- register struct proc *p = curproc; /* XXX */
- register struct ppp_softc *sc = ifp->if_softc;
- register struct ifaddr *ifa = (struct ifaddr *)data;
- register struct ifreq *ifr = (struct ifreq *)data;
- struct ppp_stats *psp;
-#ifdef PPP_COMPRESS
- struct ppp_comp_stats *pcp;
-#endif
- int s = splimp(), error = 0;
-
- switch (cmd) {
- case SIOCSIFFLAGS:
- if ((ifp->if_flags & IFF_RUNNING) == 0)
- ifp->if_flags &= ~IFF_UP;
- break;
-
- case SIOCSIFADDR:
- if (ifa->ifa_addr->sa_family != AF_INET)
- error = EAFNOSUPPORT;
- break;
-
- case SIOCSIFDSTADDR:
- if (ifa->ifa_addr->sa_family != AF_INET)
- error = EAFNOSUPPORT;
- break;
-
- case SIOCSIFMTU:
- if ((error = suser(p->p_ucred, &p->p_acflag)) != 0)
- break;
- sc->sc_if.if_mtu = ifr->ifr_mtu;
- break;
-
- case SIOCGIFMTU:
- ifr->ifr_mtu = sc->sc_if.if_mtu;
- break;
-
- case SIOCADDMULTI:
- case SIOCDELMULTI:
- if (ifr == 0) {
- error = EAFNOSUPPORT;
- break;
- }
- switch(ifr->ifr_addr.sa_family) {
-#ifdef INET
- case AF_INET:
- break;
-#endif
- default:
- error = EAFNOSUPPORT;
- break;
- }
- break;
-
- case SIOCGPPPSTATS:
- psp = &((struct ifpppstatsreq *) data)->stats;
- bzero(psp, sizeof(*psp));
- psp->p = sc->sc_stats;
-#if defined(VJC) && !defined(SL_NO_STATS)
- if (sc->sc_comp) {
- psp->vj.vjs_packets = sc->sc_comp->sls_packets;
- psp->vj.vjs_compressed = sc->sc_comp->sls_compressed;
- psp->vj.vjs_searches = sc->sc_comp->sls_searches;
- psp->vj.vjs_misses = sc->sc_comp->sls_misses;
- psp->vj.vjs_uncompressedin = sc->sc_comp->sls_uncompressedin;
- psp->vj.vjs_compressedin = sc->sc_comp->sls_compressedin;
- psp->vj.vjs_errorin = sc->sc_comp->sls_errorin;
- psp->vj.vjs_tossed = sc->sc_comp->sls_tossed;
- }
-#endif /* VJC */
- break;
-
-#ifdef PPP_COMPRESS
- case SIOCGPPPCSTATS:
- pcp = &((struct ifpppcstatsreq *) data)->stats;
- bzero(pcp, sizeof(*pcp));
- if (sc->sc_xc_state != NULL)
- (*sc->sc_xcomp->comp_stat)(sc->sc_xc_state, &pcp->c);
- if (sc->sc_rc_state != NULL)
- (*sc->sc_rcomp->decomp_stat)(sc->sc_rc_state, &pcp->d);
- break;
-#endif /* PPP_COMPRESS */
-
- default:
- error = EINVAL;
- }
- splx(s);
- return (error);
-}
-
-/*
- * Queue a packet. Start transmission if not active.
- * Packet is placed in Information field of PPP frame.
- */
-int
-pppoutput(ifp, m0, dst, rtp)
- struct ifnet *ifp;
- struct mbuf *m0;
- struct sockaddr *dst;
- struct rtentry *rtp;
-{
- register struct ppp_softc *sc = ifp->if_softc;
- int protocol, address, control;
- u_char *cp;
- int s, error;
- struct ip *ip;
- struct ifqueue *ifq;
- enum NPmode mode;
- int len;
- struct mbuf *m;
-
- if (sc->sc_devp == NULL || (ifp->if_flags & IFF_RUNNING) == 0
- || ((ifp->if_flags & IFF_UP) == 0 && dst->sa_family != AF_UNSPEC)) {
- error = ENETDOWN; /* sort of */
- goto bad;
- }
-
- /*
- * Compute PPP header.
- */
- m0->m_flags &= ~M_HIGHPRI;
- switch (dst->sa_family) {
-#ifdef INET
- case AF_INET:
- address = PPP_ALLSTATIONS;
- control = PPP_UI;
- protocol = PPP_IP;
- mode = sc->sc_npmode[NP_IP];
-
- /*
- * If this packet has the "low delay" bit set in the IP header,
- * put it on the fastq instead.
- */
- ip = mtod(m0, struct ip *);
- if (ip->ip_tos & IPTOS_LOWDELAY)
- m0->m_flags |= M_HIGHPRI;
- break;
-#endif
- case AF_UNSPEC:
- address = PPP_ADDRESS(dst->sa_data);
- control = PPP_CONTROL(dst->sa_data);
- protocol = PPP_PROTOCOL(dst->sa_data);
- mode = NPMODE_PASS;
- break;
- default:
- printf("%s: af%d not supported\n", ifp->if_xname, dst->sa_family);
- error = EAFNOSUPPORT;
- goto bad;
- }
-
- /*
- * Drop this packet, or return an error, if necessary.
- */
- if (mode == NPMODE_ERROR) {
- error = ENETDOWN;
- goto bad;
- }
- if (mode == NPMODE_DROP) {
- error = 0;
- goto bad;
- }
-
- /*
- * Add PPP header. If no space in first mbuf, allocate another.
- * (This assumes M_LEADINGSPACE is always 0 for a cluster mbuf.)
- */
- if (M_LEADINGSPACE(m0) < PPP_HDRLEN) {
- m0 = m_prepend(m0, PPP_HDRLEN, M_DONTWAIT);
- if (m0 == 0) {
- error = ENOBUFS;
- goto bad;
- }
- m0->m_len = 0;
- } else
- m0->m_data -= PPP_HDRLEN;
-
- cp = mtod(m0, u_char *);
- *cp++ = address;
- *cp++ = control;
- *cp++ = protocol >> 8;
- *cp++ = protocol & 0xff;
- m0->m_len += PPP_HDRLEN;
-
- len = 0;
- for (m = m0; m != 0; m = m->m_next)
- len += m->m_len;
-
- if (sc->sc_flags & SC_LOG_OUTPKT) {
- printf("%s output: ", ifp->if_xname);
- pppdumpm(m0);
- }
-
- if ((protocol & 0x8000) == 0) {
-#ifdef PPP_FILTER
- /*
- * Apply the pass and active filters to the packet,
- * but only if it is a data packet.
- */
- *mtod(m0, u_char *) = 1; /* indicates outbound */
- if (sc->sc_pass_filt.bf_insns != 0
- && bpf_filter(sc->sc_pass_filt.bf_insns, (u_char *) m0,
- len, 0) == 0) {
- error = 0; /* drop this packet */
- goto bad;
- }
-
- /*
- * Update the time we sent the most recent packet.
- */
- if (sc->sc_active_filt.bf_insns == 0
- || bpf_filter(sc->sc_active_filt.bf_insns, (u_char *) m0, len, 0))
- sc->sc_last_sent = time.tv_sec;
-
- *mtod(m0, u_char *) = address;
-#else
- /*
- * Update the time we sent the most recent packet.
- */
- sc->sc_last_sent = time.tv_sec;
-#endif /* PPP_FILTER */
- }
-
-#if NBPFILTER > 0
- /*
- * See if bpf wants to look at the packet.
- */
- if (sc->sc_bpf)
- bpf_mtap(sc->sc_bpf, m0);
-#endif
-
- /*
- * Put the packet on the appropriate queue.
- */
- s = splimp();
- if (mode == NPMODE_QUEUE) {
- /* XXX we should limit the number of packets on this queue */
- *sc->sc_npqtail = m0;
- m0->m_nextpkt = NULL;
- sc->sc_npqtail = &m0->m_nextpkt;
- } else {
- ifq = (m0->m_flags & M_HIGHPRI)? &sc->sc_fastq: &ifp->if_snd;
- if (IF_QFULL(ifq) && dst->sa_family != AF_UNSPEC) {
- IF_DROP(ifq);
- splx(s);
- sc->sc_if.if_oerrors++;
- sc->sc_stats.ppp_oerrors++;
- error = ENOBUFS;
- goto bad;
- }
- IF_ENQUEUE(ifq, m0);
- ppp_restart(sc);
- }
- ifp->if_lastchange = time;
- ifp->if_opackets++;
- ifp->if_obytes += len;
-
- splx(s);
- return (0);
-
-bad:
- m_freem(m0);
- return (error);
-}
-
-/*
- * After a change in the NPmode for some NP, move packets from the
- * npqueue to the send queue or the fast queue as appropriate.
- * Should be called at splimp, since we muck with the queues.
- */
-static void
-ppp_requeue(sc)
- struct ppp_softc *sc;
-{
- struct mbuf *m, **mpp;
- struct ifqueue *ifq;
- enum NPmode mode;
-
- for (mpp = &sc->sc_npqueue; (m = *mpp) != NULL; ) {
- switch (PPP_PROTOCOL(mtod(m, u_char *))) {
- case PPP_IP:
- mode = sc->sc_npmode[NP_IP];
- break;
- default:
- mode = NPMODE_PASS;
- }
-
- switch (mode) {
- case NPMODE_PASS:
- /*
- * This packet can now go on one of the queues to be sent.
- */
- *mpp = m->m_nextpkt;
- m->m_nextpkt = NULL;
- ifq = (m->m_flags & M_HIGHPRI)? &sc->sc_fastq: &sc->sc_if.if_snd;
- if (IF_QFULL(ifq)) {
- IF_DROP(ifq);
- sc->sc_if.if_oerrors++;
- sc->sc_stats.ppp_oerrors++;
- } else
- IF_ENQUEUE(ifq, m);
- break;
-
- case NPMODE_DROP:
- case NPMODE_ERROR:
- *mpp = m->m_nextpkt;
- m_freem(m);
- break;
-
- case NPMODE_QUEUE:
- mpp = &m->m_nextpkt;
- break;
- }
- }
- sc->sc_npqtail = mpp;
-}
-
-/*
- * Transmitter has finished outputting some stuff;
- * remember to call sc->sc_start later at splsoftnet.
- */
-void
-ppp_restart(sc)
- struct ppp_softc *sc;
-{
- int s = splimp();
-
- sc->sc_flags &= ~SC_TBUSY;
- schednetisr(NETISR_PPP);
- splx(s);
-}
-
-/*
- * Get a packet to send. This procedure is intended to be called at
- * splsoftnet, since it may involve time-consuming operations such as
- * applying VJ compression, packet compression, address/control and/or
- * protocol field compression to the packet.
- */
-struct mbuf *
-ppp_dequeue(sc)
- struct ppp_softc *sc;
-{
- struct mbuf *m, *mp;
- u_char *cp;
- int address, control, protocol;
- int s;
-
- /*
- * Grab a packet to send: first try the fast queue, then the
- * normal queue.
- */
- s = splimp();
- IF_DEQUEUE(&sc->sc_fastq, m);
- if (m == NULL)
- IF_DEQUEUE(&sc->sc_if.if_snd, m);
- splx(s);
-
- if (m == NULL)
- return NULL;
-
- ++sc->sc_stats.ppp_opackets;
-
- /*
- * Extract the ppp header of the new packet.
- * The ppp header will be in one mbuf.
- */
- cp = mtod(m, u_char *);
- address = PPP_ADDRESS(cp);
- control = PPP_CONTROL(cp);
- protocol = PPP_PROTOCOL(cp);
-
- switch (protocol) {
- case PPP_IP:
-#ifdef VJC
- /*
- * If the packet is a TCP/IP packet, see if we can compress it.
- */
- if ((sc->sc_flags & SC_COMP_TCP) && sc->sc_comp != NULL) {
- struct ip *ip;
- int type;
-
- mp = m;
- ip = (struct ip *) (cp + PPP_HDRLEN);
- if (mp->m_len <= PPP_HDRLEN) {
- mp = mp->m_next;
- if (mp == NULL)
- break;
- ip = mtod(mp, struct ip *);
- }
- /* this code assumes the IP/TCP header is in one non-shared mbuf */
- if (ip->ip_p == IPPROTO_TCP) {
- type = sl_compress_tcp(mp, ip, sc->sc_comp,
- !(sc->sc_flags & SC_NO_TCP_CCID));
- switch (type) {
- case TYPE_UNCOMPRESSED_TCP:
- protocol = PPP_VJC_UNCOMP;
- break;
- case TYPE_COMPRESSED_TCP:
- protocol = PPP_VJC_COMP;
- cp = mtod(m, u_char *);
- cp[0] = address; /* header has moved */
- cp[1] = control;
- cp[2] = 0;
- break;
- }
- cp[3] = protocol; /* update protocol in PPP header */
- }
- }
-#endif /* VJC */
- break;
-
-#ifdef PPP_COMPRESS
- case PPP_CCP:
- ppp_ccp(sc, m, 0);
- break;
-#endif /* PPP_COMPRESS */
- }
-
-#ifdef PPP_COMPRESS
- if (protocol != PPP_LCP && protocol != PPP_CCP
- && sc->sc_xc_state && (sc->sc_flags & SC_COMP_RUN)) {
- struct mbuf *mcomp = NULL;
- int slen, clen;
-
- slen = 0;
- for (mp = m; mp != NULL; mp = mp->m_next)
- slen += mp->m_len;
- clen = (*sc->sc_xcomp->compress)
- (sc->sc_xc_state, &mcomp, m, slen, sc->sc_if.if_mtu + PPP_HDRLEN);
- if (mcomp != NULL) {
- if (sc->sc_flags & SC_CCP_UP) {
- /* Send the compressed packet instead of the original. */
- m_freem(m);
- m = mcomp;
- cp = mtod(m, u_char *);
- protocol = cp[3];
- } else {
- /* Can't transmit compressed packets until CCP is up. */
- m_freem(mcomp);
- }
- }
- }
-#endif /* PPP_COMPRESS */
-
- /*
- * Compress the address/control and protocol, if possible.
- */
- if (sc->sc_flags & SC_COMP_AC && address == PPP_ALLSTATIONS &&
- control == PPP_UI && protocol != PPP_ALLSTATIONS &&
- protocol != PPP_LCP) {
- /* can compress address/control */
- m->m_data += 2;
- m->m_len -= 2;
- }
- if (sc->sc_flags & SC_COMP_PROT && protocol < 0xFF) {
- /* can compress protocol */
- if (mtod(m, u_char *) == cp) {
- cp[2] = cp[1]; /* move address/control up */
- cp[1] = cp[0];
- }
- ++m->m_data;
- --m->m_len;
- }
-
- return m;
-}
-
-/*
- * Software interrupt routine, called at splsoftnet.
- */
-void
-pppintr()
-{
- struct ppp_softc *sc;
- int i, s, s2;
- struct mbuf *m;
-
- sc = ppp_softc;
- s = splsoftnet();
- for (i = 0; i < NPPP; ++i, ++sc) {
- if (!(sc->sc_flags & SC_TBUSY)
- && (sc->sc_if.if_snd.ifq_head || sc->sc_fastq.ifq_head
- || sc->sc_outm)) {
- s2 = splimp();
- sc->sc_flags |= SC_TBUSY;
- splx(s2);
- (*sc->sc_start)(sc);
- }
- for (;;) {
- s2 = splimp();
- IF_DEQUEUE(&sc->sc_rawq, m);
- splx(s2);
- if (m == NULL)
- break;
- ppp_inproc(sc, m);
- }
- }
- splx(s);
-}
-
-#ifdef PPP_COMPRESS
-/*
- * Handle a CCP packet. `rcvd' is 1 if the packet was received,
- * 0 if it is about to be transmitted.
- */
-static void
-ppp_ccp(sc, m, rcvd)
- struct ppp_softc *sc;
- struct mbuf *m;
- int rcvd;
-{
- u_char *dp, *ep;
- struct mbuf *mp;
- int slen, s;
-
- /*
- * Get a pointer to the data after the PPP header.
- */
- if (m->m_len <= PPP_HDRLEN) {
- mp = m->m_next;
- if (mp == NULL)
- return;
- dp = (mp != NULL)? mtod(mp, u_char *): NULL;
- } else {
- mp = m;
- dp = mtod(mp, u_char *) + PPP_HDRLEN;
- }
-
- ep = mtod(mp, u_char *) + mp->m_len;
- if (dp + CCP_HDRLEN > ep)
- return;
- slen = CCP_LENGTH(dp);
- if (dp + slen > ep) {
- if (sc->sc_flags & SC_DEBUG)
- printf("if_ppp/ccp: not enough data in mbuf (%p+%x > %p+%x)\n",
- dp, slen, mtod(mp, u_char *), mp->m_len);
- return;
- }
-
- switch (CCP_CODE(dp)) {
- case CCP_CONFREQ:
- case CCP_TERMREQ:
- case CCP_TERMACK:
- /* CCP must be going down - disable compression */
- if (sc->sc_flags & SC_CCP_UP) {
- s = splimp();
- sc->sc_flags &= ~(SC_CCP_UP | SC_COMP_RUN | SC_DECOMP_RUN);
- splx(s);
- }
- break;
-
- case CCP_CONFACK:
- if (sc->sc_flags & SC_CCP_OPEN && !(sc->sc_flags & SC_CCP_UP)
- && slen >= CCP_HDRLEN + CCP_OPT_MINLEN
- && slen >= CCP_OPT_LENGTH(dp + CCP_HDRLEN) + CCP_HDRLEN) {
- if (!rcvd) {
- /* we're agreeing to send compressed packets. */
- if (sc->sc_xc_state != NULL
- && (*sc->sc_xcomp->comp_init)
- (sc->sc_xc_state, dp + CCP_HDRLEN, slen - CCP_HDRLEN,
- sc->sc_unit, 0, sc->sc_flags & SC_DEBUG)) {
- s = splimp();
- sc->sc_flags |= SC_COMP_RUN;
- splx(s);
- }
- } else {
- /* peer is agreeing to send compressed packets. */
- if (sc->sc_rc_state != NULL
- && (*sc->sc_rcomp->decomp_init)
- (sc->sc_rc_state, dp + CCP_HDRLEN, slen - CCP_HDRLEN,
- sc->sc_unit, 0, sc->sc_mru,
- sc->sc_flags & SC_DEBUG)) {
- s = splimp();
- sc->sc_flags |= SC_DECOMP_RUN;
- sc->sc_flags &= ~(SC_DC_ERROR | SC_DC_FERROR);
- splx(s);
- }
- }
- }
- break;
-
- case CCP_RESETACK:
- if (sc->sc_flags & SC_CCP_UP) {
- if (!rcvd) {
- if (sc->sc_xc_state && (sc->sc_flags & SC_COMP_RUN))
- (*sc->sc_xcomp->comp_reset)(sc->sc_xc_state);
- } else {
- if (sc->sc_rc_state && (sc->sc_flags & SC_DECOMP_RUN)) {
- (*sc->sc_rcomp->decomp_reset)(sc->sc_rc_state);
- s = splimp();
- sc->sc_flags &= ~SC_DC_ERROR;
- splx(s);
- }
- }
- }
- break;
- }
-}
-
-/*
- * CCP is down; free (de)compressor state if necessary.
- */
-static void
-ppp_ccp_closed(sc)
- struct ppp_softc *sc;
-{
- if (sc->sc_xc_state) {
- (*sc->sc_xcomp->comp_free)(sc->sc_xc_state);
- sc->sc_xc_state = NULL;
- }
- if (sc->sc_rc_state) {
- (*sc->sc_rcomp->decomp_free)(sc->sc_rc_state);
- sc->sc_rc_state = NULL;
- }
-}
-#endif /* PPP_COMPRESS */
-
-/*
- * PPP packet input routine.
- * The caller has checked and removed the FCS and has inserted
- * the address/control bytes and the protocol high byte if they
- * were omitted.
- */
-void
-ppppktin(sc, m, lost)
- struct ppp_softc *sc;
- struct mbuf *m;
- int lost;
-{
- int s = splimp();
-
- if (lost)
- m->m_flags |= M_ERRMARK;
- IF_ENQUEUE(&sc->sc_rawq, m);
- schednetisr(NETISR_PPP);
- splx(s);
-}
-
-/*
- * Process a received PPP packet, doing decompression as necessary.
- * Should be called at splsoftnet.
- */
-#define COMPTYPE(proto) ((proto) == PPP_VJC_COMP? TYPE_COMPRESSED_TCP: \
- TYPE_UNCOMPRESSED_TCP)
-
-static void
-ppp_inproc(sc, m)
- struct ppp_softc *sc;
- struct mbuf *m;
-{
- struct ifnet *ifp = &sc->sc_if;
- struct ifqueue *inq;
- int s, ilen, xlen, proto, rv;
- u_char *cp, adrs, ctrl;
- struct mbuf *mp, *dmp = NULL;
- u_char *iphdr;
- u_int hlen;
-
- sc->sc_stats.ppp_ipackets++;
-
- if (sc->sc_flags & SC_LOG_INPKT) {
- ilen = 0;
- for (mp = m; mp != NULL; mp = mp->m_next)
- ilen += mp->m_len;
- printf("%s: got %d bytes\n", ifp->if_xname, ilen);
- pppdumpm(m);
- }
-
- cp = mtod(m, u_char *);
- adrs = PPP_ADDRESS(cp);
- ctrl = PPP_CONTROL(cp);
- proto = PPP_PROTOCOL(cp);
-
- if (m->m_flags & M_ERRMARK) {
- m->m_flags &= ~M_ERRMARK;
- s = splimp();
- sc->sc_flags |= SC_VJ_RESET;
- splx(s);
- }
-
-#ifdef PPP_COMPRESS
- /*
- * Decompress this packet if necessary, update the receiver's
- * dictionary, or take appropriate action on a CCP packet.
- */
- if (proto == PPP_COMP && sc->sc_rc_state && (sc->sc_flags & SC_DECOMP_RUN)
- && !(sc->sc_flags & SC_DC_ERROR) && !(sc->sc_flags & SC_DC_FERROR)) {
- /* decompress this packet */
- rv = (*sc->sc_rcomp->decompress)(sc->sc_rc_state, m, &dmp);
- if (rv == DECOMP_OK) {
- m_freem(m);
- if (dmp == NULL) {
- /* no error, but no decompressed packet produced */
- return;
- }
- m = dmp;
- cp = mtod(m, u_char *);
- proto = PPP_PROTOCOL(cp);
-
- } else {
- /*
- * An error has occurred in decompression.
- * Pass the compressed packet up to pppd, which may take
- * CCP down or issue a Reset-Req.
- */
- if (sc->sc_flags & SC_DEBUG)
- printf("%s: decompress failed %d\n", ifp->if_xname, rv);
- s = splimp();
- sc->sc_flags |= SC_VJ_RESET;
- if (rv == DECOMP_ERROR)
- sc->sc_flags |= SC_DC_ERROR;
- else
- sc->sc_flags |= SC_DC_FERROR;
- splx(s);
- }
-
- } else {
- if (sc->sc_rc_state && (sc->sc_flags & SC_DECOMP_RUN)) {
- (*sc->sc_rcomp->incomp)(sc->sc_rc_state, m);
- }
- if (proto == PPP_CCP) {
- ppp_ccp(sc, m, 1);
- }
- }
-#endif
-
- ilen = 0;
- for (mp = m; mp != NULL; mp = mp->m_next)
- ilen += mp->m_len;
-
-#ifdef VJC
- if (sc->sc_flags & SC_VJ_RESET) {
- /*
- * If we've missed a packet, we must toss subsequent compressed
- * packets which don't have an explicit connection ID.
- */
- if (sc->sc_comp)
- sl_uncompress_tcp(NULL, 0, TYPE_ERROR, sc->sc_comp);
- s = splimp();
- sc->sc_flags &= ~SC_VJ_RESET;
- splx(s);
- }
-
- /*
- * See if we have a VJ-compressed packet to uncompress.
- */
- if (proto == PPP_VJC_COMP) {
- if ((sc->sc_flags & SC_REJ_COMP_TCP) || sc->sc_comp == 0)
- goto bad;
-
- xlen = sl_uncompress_tcp_core(cp + PPP_HDRLEN, m->m_len - PPP_HDRLEN,
- ilen - PPP_HDRLEN, TYPE_COMPRESSED_TCP,
- sc->sc_comp, &iphdr, &hlen);
-
- if (xlen <= 0) {
- if (sc->sc_flags & SC_DEBUG)
- printf("%s: VJ uncompress failed on type comp\n",
- ifp->if_xname);
- goto bad;
- }
-
- /* Copy the PPP and IP headers into a new mbuf. */
- MGETHDR(mp, M_DONTWAIT, MT_DATA);
- if (mp == NULL)
- goto bad;
- mp->m_len = 0;
- mp->m_next = NULL;
- if (hlen + PPP_HDRLEN > MHLEN) {
- MCLGET(mp, M_DONTWAIT);
- if (M_TRAILINGSPACE(mp) < hlen + PPP_HDRLEN) {
- m_freem(mp);
- goto bad; /* lose if big headers and no clusters */
- }
- }
- cp = mtod(mp, u_char *);
- cp[0] = adrs;
- cp[1] = ctrl;
- cp[2] = 0;
- cp[3] = PPP_IP;
- proto = PPP_IP;
- bcopy(iphdr, cp + PPP_HDRLEN, hlen);
- mp->m_len = hlen + PPP_HDRLEN;
-
- /*
- * Trim the PPP and VJ headers off the old mbuf
- * and stick the new and old mbufs together.
- */
- m->m_data += PPP_HDRLEN + xlen;
- m->m_len -= PPP_HDRLEN + xlen;
- if (m->m_len <= M_TRAILINGSPACE(mp)) {
- bcopy(mtod(m, u_char *), mtod(mp, u_char *) + mp->m_len, m->m_len);
- mp->m_len += m->m_len;
- MFREE(m, mp->m_next);
- } else
- mp->m_next = m;
- m = mp;
- ilen += hlen - xlen;
-
- } else if (proto == PPP_VJC_UNCOMP) {
- if ((sc->sc_flags & SC_REJ_COMP_TCP) || sc->sc_comp == 0)
- goto bad;
-
- xlen = sl_uncompress_tcp_core(cp + PPP_HDRLEN, m->m_len - PPP_HDRLEN,
- ilen - PPP_HDRLEN, TYPE_UNCOMPRESSED_TCP,
- sc->sc_comp, &iphdr, &hlen);
-
- if (xlen < 0) {
- if (sc->sc_flags & SC_DEBUG)
- printf("%s: VJ uncompress failed on type uncomp\n",
- ifp->if_xname);
- goto bad;
- }
-
- proto = PPP_IP;
- cp[3] = PPP_IP;
- }
-#endif /* VJC */
-
- /*
- * If the packet will fit in a header mbuf, don't waste a
- * whole cluster on it.
- */
- if (ilen <= MHLEN && M_IS_CLUSTER(m)) {
- MGETHDR(mp, M_DONTWAIT, MT_DATA);
- if (mp != NULL) {
- m_copydata(m, 0, ilen, mtod(mp, caddr_t));
- m_freem(m);
- m = mp;
- m->m_len = ilen;
- }
- }
- m->m_pkthdr.len = ilen;
- m->m_pkthdr.rcvif = ifp;
-
- if ((proto & 0x8000) == 0) {
-#ifdef PPP_FILTER
- /*
- * See whether we want to pass this packet, and
- * if it counts as link activity.
- */
- adrs = *mtod(m, u_char *); /* save address field */
- *mtod(m, u_char *) = 0; /* indicate inbound */
- if (sc->sc_pass_filt.bf_insns != 0
- && bpf_filter(sc->sc_pass_filt.bf_insns, (u_char *) m,
- ilen, 0) == 0) {
- /* drop this packet */
- m_freem(m);
- return;
- }
- if (sc->sc_active_filt.bf_insns == 0
- || bpf_filter(sc->sc_active_filt.bf_insns, (u_char *) m, ilen, 0))
- sc->sc_last_recv = time.tv_sec;
-
- *mtod(m, u_char *) = adrs;
-#else
- /*
- * Record the time that we received this packet.
- */
- sc->sc_last_recv = time.tv_sec;
-#endif /* PPP_FILTER */
- }
-
-#if NBPFILTER > 0
- /* See if bpf wants to look at the packet. */
- if (sc->sc_bpf)
- bpf_mtap(sc->sc_bpf, m);
-#endif
-
- rv = 0;
- switch (proto) {
-#ifdef INET
- case PPP_IP:
- /*
- * IP packet - take off the ppp header and pass it up to IP.
- */
- if ((ifp->if_flags & IFF_UP) == 0
- || sc->sc_npmode[NP_IP] != NPMODE_PASS) {
- /* interface is down - drop the packet. */
- m_freem(m);
- return;
- }
- m->m_pkthdr.len -= PPP_HDRLEN;
- m->m_data += PPP_HDRLEN;
- m->m_len -= PPP_HDRLEN;
-#ifdef __NetBSD_Version__
-#ifdef GATEWAY
- if (ipflow_fastforward(m))
- return;
-#endif
-#endif
- schednetisr(NETISR_IP);
- inq = &ipintrq;
- break;
-#endif
-
- default:
- /*
- * Some other protocol - place on input queue for read().
- */
- inq = &sc->sc_inq;
- rv = 1;
- break;
- }
-
- /*
- * Put the packet on the appropriate input queue.
- */
- s = splimp();
- if (IF_QFULL(inq)) {
- IF_DROP(inq);
- splx(s);
- if (sc->sc_flags & SC_DEBUG)
- printf("%s: input queue full\n", ifp->if_xname);
- ifp->if_iqdrops++;
- goto bad;
- }
- IF_ENQUEUE(inq, m);
- splx(s);
- ifp->if_ipackets++;
- ifp->if_ibytes += ilen;
- ifp->if_lastchange = time;
-
- if (rv)
- (*sc->sc_ctlp)(sc);
-
- return;
-
- bad:
- m_freem(m);
- sc->sc_if.if_ierrors++;
- sc->sc_stats.ppp_ierrors++;
-}
-
-#define MAX_DUMP_BYTES 128
-
-static void
-pppdumpm(m0)
- struct mbuf *m0;
-{
- char buf[3*MAX_DUMP_BYTES+4];
- char *bp = buf;
- struct mbuf *m;
- static char digits[] = "0123456789abcdef";
-
- for (m = m0; m; m = m->m_next) {
- int l = m->m_len;
- u_char *rptr = (u_char *)m->m_data;
-
- while (l--) {
- if (bp > buf + sizeof(buf) - 4)
- goto done;
- *bp++ = digits[*rptr >> 4]; /* convert byte to ascii hex */
- *bp++ = digits[*rptr++ & 0xf];
- }
-
- if (m->m_next) {
- if (bp > buf + sizeof(buf) - 3)
- goto done;
- *bp++ = '|';
- } else
- *bp++ = ' ';
- }
-done:
- if (m)
- *bp++ = '>';
- *bp = 0;
- printf("%s\n", buf);
-}
-
-#endif /* NPPP > 0 */
projects / ppp.git / blobdiff