diff options
Diffstat (limited to 'sys/net/if_ppp.c')
| -rw-r--r-- | sys/net/if_ppp.c | 1733 |
1 files changed, 0 insertions, 1733 deletions
diff --git a/sys/net/if_ppp.c b/sys/net/if_ppp.c deleted file mode 100644 index 753adf926becd..0000000000000 --- a/sys/net/if_ppp.c +++ /dev/null @@ -1,1733 +0,0 @@ -/* - * if_ppp.c - Point-to-Point Protocol (PPP) Asynchronous driver. - */ - -/*- - * 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. - * - * 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). - */ - -/* $FreeBSD$ */ -/* 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 "opt_inet.h" -#include "opt_inet6.h" -#include "opt_ipx.h" -#include "opt_mac.h" -#include "opt_ppp.h" - -#ifdef INET -#define VJC -#endif -#define PPP_COMPRESS - -#include <sys/param.h> -#include <sys/systm.h> -#include <sys/priv.h> -#include <sys/proc.h> -#include <sys/mbuf.h> -#include <sys/socket.h> -#include <sys/filio.h> -#include <sys/sockio.h> -#include <sys/kernel.h> -#include <sys/time.h> -#include <sys/malloc.h> -#include <sys/module.h> - -#include <net/if.h> -#include <net/if_clone.h> -#include <net/if_types.h> -#include <net/netisr.h> -#include <net/bpf.h> - -#ifdef INET -#include <netinet/in.h> -#include <netinet/in_systm.h> -#include <netinet/in_var.h> -#include <netinet/ip.h> -#endif - -#ifdef IPX -#include <netipx/ipx.h> -#include <netipx/ipx_if.h> -#endif - -#ifdef VJC -#include <net/slcompress.h> -#endif - -#include <net/if_ppp.h> -#include <net/if_pppvar.h> - -#include <security/mac/mac_framework.h> - -/* minimise diffs */ -#ifndef splsoftnet -#define splsoftnet splnet -#endif - -#ifdef PPP_COMPRESS -#define PACKETPTR struct mbuf * -#include <net/ppp_comp.h> -#endif - -#define PPPNAME "ppp" -static MALLOC_DEFINE(M_PPP, PPPNAME, "PPP interface"); - -static struct mtx ppp_softc_list_mtx; -static LIST_HEAD(, ppp_softc) ppp_softc_list; - -#define PPP_LIST_LOCK_INIT() mtx_init(&ppp_softc_list_mtx, \ - "ppp_softc_list_mtx", NULL, MTX_DEF) -#define PPP_LIST_LOCK_DESTROY() mtx_destroy(&ppp_softc_list_mtx) -#define PPP_LIST_LOCK() mtx_lock(&ppp_softc_list_mtx) -#define PPP_LIST_UNLOCK() mtx_unlock(&ppp_softc_list_mtx) - -/* XXX layering violation */ -extern void pppasyncattach(void *); -extern void pppasyncdetach(void); - -static int pppsioctl(struct ifnet *ifp, u_long cmd, caddr_t data); -static void pppintr(void); - -static void ppp_requeue(struct ppp_softc *); -static void ppp_ccp(struct ppp_softc *, struct mbuf *m, int rcvd); -static void ppp_ccp_closed(struct ppp_softc *); -static void ppp_inproc(struct ppp_softc *, struct mbuf *); -static void pppdumpm(struct mbuf *m0); -static int ppp_clone_create(struct if_clone *, int, caddr_t); -static void ppp_clone_destroy(struct ifnet *); - -IFC_SIMPLE_DECLARE(ppp, 0); - -/* - * 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; - -static struct compressor *ppp_compressors[8] = { -#if defined(PPP_BSDCOMP) - &ppp_bsd_compress, -#endif -#if defined(PPP_DEFLATE) - &ppp_deflate, - &ppp_deflate_draft, -#endif - NULL -}; -#endif /* PPP_COMPRESS */ - -static int -ppp_clone_create(struct if_clone *ifc, int unit, caddr_t params) -{ - struct ifnet *ifp; - struct ppp_softc *sc; - - sc = malloc(sizeof(struct ppp_softc), M_PPP, M_WAITOK | M_ZERO); - ifp = sc->sc_ifp = if_alloc(IFT_PPP); - if (ifp == NULL) { - free(sc, M_PPP); - return (ENOSPC); - } - - callout_init(&sc->sc_timo_ch, 0); - ifp->if_softc = sc; - if_initname(ifp, ifc->ifc_name, unit); - ifp->if_mtu = PPP_MTU; - ifp->if_flags = IFF_POINTOPOINT | IFF_MULTICAST | IFF_NEEDSGIANT; - ifp->if_hdrlen = PPP_HDRLEN; - ifp->if_ioctl = pppsioctl; - ifp->if_output = pppoutput; - ifp->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; - mtx_init(&sc->sc_inq.ifq_mtx, "ppp_inq", NULL, MTX_DEF); - mtx_init(&sc->sc_fastq.ifq_mtx, "ppp_fastq", NULL, MTX_DEF); - mtx_init(&sc->sc_rawq.ifq_mtx, "ppp_rawq", NULL, MTX_DEF); - if_attach(ifp); - bpfattach(ifp, DLT_PPP, PPP_HDRLEN); - - PPP_LIST_LOCK(); - LIST_INSERT_HEAD(&ppp_softc_list, sc, sc_list); - PPP_LIST_UNLOCK(); - - return (0); -} - -static void -ppp_clone_destroy(struct ifnet *ifp) -{ - struct ppp_softc *sc; - - sc = ifp->if_softc; - PPP_LIST_LOCK(); - LIST_REMOVE(sc, sc_list); - PPP_LIST_UNLOCK(); - - bpfdetach(ifp); - if_detach(ifp); - if_free(ifp); - mtx_destroy(&sc->sc_rawq.ifq_mtx); - mtx_destroy(&sc->sc_fastq.ifq_mtx); - mtx_destroy(&sc->sc_inq.ifq_mtx); - free(sc, M_PPP); -} - -static int -ppp_modevent(module_t mod, int type, void *data) -{ - - switch (type) { - case MOD_LOAD: - PPP_LIST_LOCK_INIT(); - LIST_INIT(&ppp_softc_list); - if_clone_attach(&ppp_cloner); - - netisr_register(NETISR_PPP, (netisr_t *)pppintr, NULL, - NETISR_FORCEQUEUE); - /* - * XXX layering violation - if_ppp can work over any lower - * level transport that cares to attach to it. - */ - pppasyncattach(NULL); - break; - case MOD_UNLOAD: - /* XXX: layering violation */ - pppasyncdetach(); - - netisr_unregister(NETISR_PPP); - - if_clone_detach(&ppp_cloner); - PPP_LIST_LOCK_DESTROY(); - break; - default: - return EOPNOTSUPP; - } - return 0; -} - -static moduledata_t ppp_mod = { - "if_ppp", - ppp_modevent, - 0 -}; - -DECLARE_MODULE(if_ppp, ppp_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); - -/* - * Allocate a ppp interface unit and initialize it. - */ -struct ppp_softc * -pppalloc(pid) - pid_t pid; -{ - int i; - char tmpname[IFNAMSIZ]; - struct ifnet *ifp; - struct ppp_softc *sc; - - PPP_LIST_LOCK(); - LIST_FOREACH(sc, &ppp_softc_list, sc_list) { - if (sc->sc_xfer == pid) { - sc->sc_xfer = 0; - PPP_LIST_UNLOCK(); - return sc; - } - } - LIST_FOREACH(sc, &ppp_softc_list, sc_list) { - if (sc->sc_devp == NULL) - break; - } - PPP_LIST_UNLOCK(); - /* Try to clone an interface if we don't have a free one */ - if (sc == NULL) { - strcpy(tmpname, PPPNAME); - if (if_clone_create(tmpname, sizeof(tmpname), (caddr_t) 0) != 0) - return NULL; - ifp = ifunit(tmpname); - if (ifp == NULL) - return NULL; - sc = ifp->if_softc; - } - if (sc == NULL || sc->sc_devp != NULL) - 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 - sc->sc_comp = malloc(sizeof(struct slcompress), - M_DEVBUF, M_NOWAIT); - if (sc->sc_comp) - sl_compress_init(sc->sc_comp, -1); -#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_uptime; - - 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(PPP2IFP(sc)); - PPP2IFP(sc)->if_flags &= ~IFF_UP; - PPP2IFP(sc)->if_drv_flags &= ~IFF_DRV_RUNNING; - getmicrotime(&PPP2IFP(sc)->if_lastchange); - sc->sc_devp = NULL; - sc->sc_xfer = 0; - IF_DRAIN(&sc->sc_rawq); - IF_DRAIN(&sc->sc_inq); - IF_DRAIN(&sc->sc_fastq); - while ((m = sc->sc_npqueue) != NULL) { - sc->sc_npqueue = m->m_nextpkt; - m_freem(m); - } -#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, td) - struct ppp_softc *sc; - u_long cmd; - caddr_t data; - int flag; - struct thread *td; -{ - struct proc *p = td->td_proc; - int s, flags, mru, npx; - u_int nb; - int error = 0; - 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 = PPP2IFP(sc)->if_dunit; - break; - - case PPPIOCGFLAGS: - *(u_int *)data = sc->sc_flags; - break; - - case PPPIOCSFLAGS: - error = priv_check(td, PRIV_NET_PPP); - if (error) - break; - 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: - error = priv_check(td, PRIV_NET_PPP); - if (error) - 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: - error = priv_check(td, PRIV_NET_PPP); - if (error) - break; - if (sc->sc_comp) { - s = splsoftnet(); - sl_compress_init(sc->sc_comp, *(int *)data); - splx(s); - } - break; -#endif - - case PPPIOCXFERUNIT: - error = priv_check(td, PRIV_NET_PPP); - if (error) - break; - sc->sc_xfer = p->p_pid; - break; - -#ifdef PPP_COMPRESS - case PPPIOCSCOMPRESS: - error = priv_check(td, PRIV_NET_PPP); - if (error) - break; - 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) - break; - if (ccp_option[1] < 2) { /* preliminary check on the length byte */ - error = EINVAL; - break; - } - 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) - if_printf(PPP2IFP(sc), "comp_alloc failed\n"); - 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) - if_printf(PPP2IFP(sc), "decomp_alloc failed\n"); - error = ENOBUFS; - } - splimp(); - sc->sc_flags &= ~SC_DECOMP_RUN; - splx(s); - } - return (error); - } - if (sc->sc_flags & SC_DEBUG) - if_printf(PPP2IFP(sc), "no compressor for [%x %x %x], %x\n", - ccp_option[0], ccp_option[1], ccp_option[2], nb); - error = EINVAL; /* no handler found */ - break; -#endif /* PPP_COMPRESS */ - - case PPPIOCGNPMODE: - case PPPIOCSNPMODE: - npi = (struct npioctl *) data; - npx = 0; /* XXX: quiet gcc */ - switch (npi->protocol) { - case PPP_IP: - npx = NP_IP; - break; - case PPP_IPV6: - npx = NP_IPV6; - break; - default: - error = EINVAL; - } - if (error) - break; - if (cmd == PPPIOCGNPMODE) { - npi->mode = sc->sc_npmode[npx]; - } else { - error = priv_check(td, PRIV_NET_PPP); - if (error) - break; - if (npi->mode != sc->sc_npmode[npx]) { - s = splsoftnet(); - sc->sc_npmode[npx] = npi->mode; - if (npi->mode != NPMODE_QUEUE) { - ppp_requeue(sc); - (*sc->sc_start)(sc); - } - splx(s); - } - } - break; - - case PPPIOCGIDLE: - s = splsoftnet(); - t = time_uptime; - ((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) { - error = EINVAL; - break; - } - newcodelen = nbp->bf_len * sizeof(struct bpf_insn); - if (newcodelen != 0) { - newcode = malloc(newcodelen, M_DEVBUF, M_WAITOK); - if (newcode == 0) { - error = EINVAL; /* or sumpin */ - break; - } - if ((error = copyin((caddr_t)nbp->bf_insns, (caddr_t)newcode, - newcodelen)) != 0) { - free(newcode, M_DEVBUF); - break; - } - if (!bpf_validate(newcode, nbp->bf_len)) { - free(newcode, M_DEVBUF); - error = EINVAL; - break; - } - } 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: - error = ENOIOCTL; - break; - } - return (error); -} - -/* - * 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; -{ - struct thread *td = curthread; /* 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_drv_flags & IFF_DRV_RUNNING) == 0) - ifp->if_flags &= ~IFF_UP; - break; - - case SIOCSIFADDR: - case SIOCAIFADDR: - switch(ifa->ifa_addr->sa_family) { -#ifdef INET - case AF_INET: - break; -#endif -#ifdef INET6 - case AF_INET6: - break; -#endif -#ifdef IPX - case AF_IPX: - break; -#endif - default: - error = EAFNOSUPPORT; - break; - } - break; - - case SIOCSIFDSTADDR: - switch(ifa->ifa_addr->sa_family) { -#ifdef INET - case AF_INET: - break; -#endif -#ifdef INET6 - case AF_INET6: - break; -#endif -#ifdef IPX - case AF_IPX: - break; -#endif - default: - error = EAFNOSUPPORT; - break; - } - break; - - case SIOCSIFMTU: - /* - * XXXRW: Isn't this priv_check() check redundant to the one at the - * ifnet layer? - */ - error = priv_check(td, PRIV_NET_SETIFMTU); - if (error) - break; - if (ifr->ifr_mtu > PPP_MAXMTU) - error = EINVAL; - else { - PPP2IFP(sc)->if_mtu = ifr->ifr_mtu; - if (sc->sc_setmtu) - (*sc->sc_setmtu)(sc); - } - break; - - case SIOCGIFMTU: - ifr->ifr_mtu = PPP2IFP(sc)->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 -#ifdef INET6 - case AF_INET6: - 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 = ENOTTY; - } - splx(s); - return (error); -} - -/* - * Queue a packet. Start transmission if not active. - * Packet is placed in Information field of PPP frame. - * Called at splnet as the if->if_output handler. - * Called at splnet from pppwrite(). - */ -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; - -#ifdef MAC - error = mac_ifnet_check_transmit(ifp, m0); - if (error) - goto bad; -#endif - - if (sc->sc_devp == NULL || (ifp->if_drv_flags & IFF_DRV_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 -#ifdef INET6 - case AF_INET6: - address = PPP_ALLSTATIONS; /*XXX*/ - control = PPP_UI; /*XXX*/ - protocol = PPP_IPV6; - mode = sc->sc_npmode[NP_IPV6]; - -#if 0 /* XXX flowinfo/traffic class, maybe? */ - /* - * 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; -#endif - break; -#endif -#ifdef IPX - case AF_IPX: - /* - * This is pretty bogus.. We dont have an ipxcp module in pppd - * yet to configure the link parameters. Sigh. I guess a - * manual ifconfig would do.... -Peter - */ - address = PPP_ALLSTATIONS; - control = PPP_UI; - protocol = PPP_IPX; - mode = NPMODE_PASS; - 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: - if_printf(ifp, "af%d not supported\n", 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 = m_length(m0, NULL); - - 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_uptime; - - *mtod(m0, u_char *) = address; -#else - /* - * Update the time we sent the most recent data packet. - */ - sc->sc_last_sent = time_uptime; -#endif /* PPP_FILTER */ - } - - /* - * See if bpf wants to look at the packet. - */ - BPF_MTAP(ifp, m0); - - /* - * Put the packet on the appropriate queue. - */ - s = splsoftnet(); /* redundant */ - 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 { - /* fastq and if_snd are emptied at spl[soft]net now */ - ifq = (m0->m_flags & M_HIGHPRI)? &sc->sc_fastq: - (struct ifqueue *)&ifp->if_snd; - IF_LOCK(ifq); - if (_IF_QFULL(ifq) && dst->sa_family != AF_UNSPEC) { - _IF_DROP(ifq); - IF_UNLOCK(ifq); - PPP2IFP(sc)->if_oerrors++; - sc->sc_stats.ppp_oerrors++; - error = ENOBUFS; - goto bad; - } - _IF_ENQUEUE(ifq, m0); - IF_UNLOCK(ifq); - (*sc->sc_start)(sc); - } - getmicrotime(&ifp->if_lastchange); - 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 spl[soft]net. - */ -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; - case PPP_IPV6: - mode = sc->sc_npmode[NP_IPV6]; - 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: - (struct ifqueue *)&PPP2IFP(sc)->if_snd; - if (! IF_HANDOFF(ifq, m, NULL)) { - PPP2IFP(sc)->if_oerrors++; - sc->sc_stats.ppp_oerrors++; - } - 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; - - /* - * Grab a packet to send: first try the fast queue, then the - * normal queue. - */ - IF_DEQUEUE(&sc->sc_fastq, m); - if (m == NULL) - IF_DEQUEUE(&PPP2IFP(sc)->if_snd, m); - 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 = m_length(m, NULL); - clen = (*sc->sc_xcomp->compress) - (sc->sc_xc_state, &mcomp, m, slen, PPP2IFP(sc)->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 spl[soft]net. - */ -static void -pppintr() -{ - struct ppp_softc *sc; - int s; - struct mbuf *m; - - mtx_lock(&Giant); - PPP_LIST_LOCK(); - LIST_FOREACH(sc, &ppp_softc_list, sc_list) { - s = splimp(); - if (!(sc->sc_flags & SC_TBUSY) - && (PPP2IFP(sc)->if_snd.ifq_head || sc->sc_fastq.ifq_head)) { - sc->sc_flags |= SC_TBUSY; - splx(s); - (*sc->sc_start)(sc); - } else - splx(s); - for (;;) { - s = splimp(); - IF_DEQUEUE(&sc->sc_rawq, m); - splx(s); - if (m == NULL) - break; -#ifdef MAC - mac_ifnet_create_mbuf(PPP2IFP(sc), m); -#endif - ppp_inproc(sc, m); - } - } - PPP_LIST_UNLOCK(); - mtx_unlock(&Giant); -} - -#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, - PPP2IFP(sc)->if_dunit, 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, - PPP2IFP(sc)->if_dunit, 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 = PPP2IFP(sc); - int isr; - int s, ilen = 0, 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 = m_length(m, NULL); - if_printf(ifp, "got %d bytes\n", 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) - if_printf(ifp, "decompress failed %d\n", 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 = m_length(m, NULL); - -#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) - if_printf(ifp, "VJ uncompress failed on type comp\n"); - 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 */ - } - } -#ifdef MAC - mac_mbuf_copy(m, mp); -#endif - 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; - mp->m_next = m_free(m); - } 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) - if_printf(ifp, "VJ uncompress failed on type uncomp\n"); - 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) { -#ifdef MAC - mac_mbuf_copy(m, mp); -#endif - 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_uptime; - - *mtod(m, u_char *) = adrs; -#else - /* - * Record the time that we received this packet. - */ - sc->sc_last_recv = time_uptime; -#endif /* PPP_FILTER */ - } - - /* See if bpf wants to look at the packet. */ - BPF_MTAP(PPP2IFP(sc), m); - - isr = -1; - 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; - if ((m = ip_fastforward(m)) == NULL) - return; - isr = NETISR_IP; - break; -#endif -#ifdef INET6 - case PPP_IPV6: - /* - * IPv6 packet - take off the ppp header and pass it up to IPv6. - */ - if ((ifp->if_flags & IFF_UP) == 0 - || sc->sc_npmode[NP_IPV6] != 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; - isr = NETISR_IPV6; - break; -#endif -#ifdef IPX - case PPP_IPX: - /* - * IPX packet - take off the ppp header and pass it up to IPX. - */ - if ((PPP2IFP(sc)->if_flags & IFF_UP) == 0 - /* XXX: || sc->sc_npmode[NP_IPX] != 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; - isr = NETISR_IPX; - sc->sc_last_recv = time_uptime; /* update time of last pkt rcvd */ - break; -#endif - - default: - /* - * Some other protocol - place on input queue for read(). - */ - break; - } - - if (isr == -1) - rv = IF_HANDOFF(&sc->sc_inq, m, NULL); - else - rv = netisr_queue(isr, m); /* (0) on success. */ - if ((isr == -1 && !rv) || (isr != -1 && rv)) { - if (sc->sc_flags & SC_DEBUG) - if_printf(ifp, "input queue full\n"); - ifp->if_iqdrops++; - m = NULL; - goto bad; - } - ifp->if_ipackets++; - ifp->if_ibytes += ilen; - getmicrotime(&ifp->if_lastchange); - - if (isr == -1) - (*sc->sc_ctlp)(sc); - - return; - - bad: - if (m) - m_freem(m); - PPP2IFP(sc)->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; - - 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++ = hex2ascii(*rptr >> 4); - *bp++ = hex2ascii(*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); -} |