/* * Copyright (c) 1997, 2002 Hellmuth Michaelis. 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * *--------------------------------------------------------------------------- * * i4b_ipr.c - isdn4bsd IP over raw HDLC ISDN network driver * --------------------------------------------------------- * last edit-date: [Sun Mar 17 09:32:58 2002] * *---------------------------------------------------------------------------* * * statistics counter usage (interface lifetime): * ---------------------------------------------- * sc->sc_if.if_ipackets # of received packets * sc->sc_if.if_ierrors # of error packets not going to upper layers * sc->sc_if.if_opackets # of transmitted packets * sc->sc_if.if_oerrors # of error packets not being transmitted * sc->sc_if.if_collisions # of invalid ip packets after VJ decompression * sc->sc_if.if_ibytes # of bytes coming in from the line (before VJ) * sc->sc_if.if_obytes # of bytes going out to the line (after VJ) * sc->sc_if.if_imcasts (currently unused) * sc->sc_if.if_omcasts # of frames sent out of the fastqueue * sc->sc_if.if_iqdrops # of frames dropped on input because queue full * sc->sc_if.if_noproto # of frames dropped on output because !AF_INET * * statistics counter usage (connection lifetime): * ----------------------------------------------- * sc->sc_iinb # of ISDN incoming bytes from HSCX * sc->sc_ioutb # of ISDN outgoing bytes from HSCX * sc->sc_inb # of incoming bytes after decompression * sc->sc_outb # of outgoing bytes before compression * *---------------------------------------------------------------------------*/ #include __FBSDID("$FreeBSD$"); #include "opt_i4b.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef IPR_VJ #include #include #define IPR_COMPRESS IFF_LINK0 /* compress TCP traffic */ #define IPR_AUTOCOMP IFF_LINK1 /* auto-enable TCP compression */ /*--------------------------------------------------------------------------- * NOTICE: using NO separate buffer relies on the assumption, that the HSCX * IRQ handler _always_ allocates a single, continuous mbuf cluster large * enough to hold the maximum MTU size if the ipr interface ! * * CAUTION: i have re-defined IPR_VJ_USEBUFFER because it makes problems * with 2 i4b's back to back running cvs over ssh, cvs simply * aborts because it gets bad data. Everything else (telnet/ftp?etc) * functions fine. *---------------------------------------------------------------------------*/ #define IPR_VJ_USEBUFFER /* define to use an allocated separate buffer*/ /* undef to uncompress in the mbuf itself */ #endif /* IPR_VJ */ #include #include #include #include #include #include #include NET_NEEDS_GIANT("i4b_ipr"); #define I4BIPRMTU 1500 /* regular MTU */ #define I4BIPRMAXMTU 2000 /* max MTU */ #define I4BIPRMINMTU 500 /* min MTU */ #define I4BIPRMAXQLEN 50 /* max queue length */ #define I4BIPRACCT 1 /* enable accounting messages */ #define I4BIPRACCTINTVL 2 /* accounting msg interval in secs */ #define I4BIPRADJFRXP 1 /* adjust 1st rxd packet */ /* initialized by L4 */ static drvr_link_t ipr_drvr_linktab[NI4BIPR]; static isdn_link_t *isdn_linktab[NI4BIPR]; struct ipr_softc { struct ifnet sc_if; /* network-visible interface */ int sc_state; /* state of the interface */ call_desc_t *sc_cdp; /* ptr to call descriptor */ int sc_updown; /* soft state of interface */ struct ifqueue sc_fastq; /* interactive traffic */ int sc_dialresp; /* dialresponse */ int sc_lastdialresp;/* last dialresponse */ struct callout_handle sc_callout; #if I4BIPRACCT int sc_iinb; /* isdn driver # of inbytes */ int sc_ioutb; /* isdn driver # of outbytes */ int sc_inb; /* # of bytes rx'd */ int sc_outb; /* # of bytes tx'd */ int sc_linb; /* last # of bytes rx'd */ int sc_loutb; /* last # of bytes tx'd */ int sc_fn; /* flag, first null acct */ #endif #ifdef I4BIPRADJFRXP int sc_first_pkt; /* flag, first rxd packet */ #endif #if IPR_LOG int sc_log_first; /* log first n packets */ #endif #ifdef IPR_VJ struct slcompress sc_compr; /* tcp compression data */ #ifdef IPR_VJ_USEBUFFER u_char *sc_cbuf; /* tcp decompression buffer */ #endif #endif } ipr_softc[NI4BIPR]; enum ipr_states { ST_IDLE, /* initialized, ready, idle */ ST_DIALING, /* dialling out to remote */ ST_CONNECTED_W, /* connected to remote */ ST_CONNECTED_A, /* connected to remote */ }; static void i4biprattach(void *); PSEUDO_SET(i4biprattach, i4b_ipr); static int i4biprioctl(struct ifnet *ifp, u_long cmd, caddr_t data); static void iprwatchdog(struct ifnet *ifp); static void ipr_init_linktab(int unit); static void ipr_tx_queue_empty(int unit); static int i4biproutput(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst, struct rtentry *rtp); static void iprclearqueues(struct ipr_softc *sc); /*===========================================================================* * DEVICE DRIVER ROUTINES *===========================================================================*/ /*---------------------------------------------------------------------------* * interface attach routine at kernel boot time *---------------------------------------------------------------------------*/ static void i4biprattach(void *dummy) { struct ipr_softc *sc = ipr_softc; int i; #ifdef IPR_VJ printf("i4bipr: %d IP over raw HDLC ISDN device(s) attached (VJ header compression)\n", NI4BIPR); #else printf("i4bipr: %d IP over raw HDLC ISDN device(s) attached\n", NI4BIPR); #endif for(i=0; i < NI4BIPR; sc++, i++) { ipr_init_linktab(i); NDBGL4(L4_DIALST, "setting dial state to ST_IDLE"); sc->sc_if.if_softc = sc; sc->sc_state = ST_IDLE; if_initname(&sc->sc_if, "ipr", i); #ifdef IPR_VJ sc->sc_if.if_flags = IFF_POINTOPOINT | IFF_SIMPLEX | IPR_AUTOCOMP; #else sc->sc_if.if_flags = IFF_POINTOPOINT | IFF_SIMPLEX; #endif sc->sc_if.if_mtu = I4BIPRMTU; sc->sc_if.if_type = IFT_ISDNBASIC; sc->sc_if.if_ioctl = i4biprioctl; sc->sc_if.if_output = i4biproutput; sc->sc_if.if_snd.ifq_maxlen = I4BIPRMAXQLEN; sc->sc_fastq.ifq_maxlen = I4BIPRMAXQLEN; if(!mtx_initialized(&sc->sc_fastq.ifq_mtx)) mtx_init(&sc->sc_fastq.ifq_mtx, "i4b_ipr_fastq", NULL, MTX_DEF); sc->sc_if.if_ipackets = 0; sc->sc_if.if_ierrors = 0; sc->sc_if.if_opackets = 0; sc->sc_if.if_oerrors = 0; sc->sc_if.if_collisions = 0; sc->sc_if.if_ibytes = 0; sc->sc_if.if_obytes = 0; sc->sc_if.if_imcasts = 0; sc->sc_if.if_omcasts = 0; sc->sc_if.if_iqdrops = 0; sc->sc_if.if_noproto = 0; #if I4BIPRACCT sc->sc_if.if_timer = 0; sc->sc_if.if_watchdog = iprwatchdog; sc->sc_iinb = 0; sc->sc_ioutb = 0; sc->sc_inb = 0; sc->sc_outb = 0; sc->sc_linb = 0; sc->sc_loutb = 0; sc->sc_fn = 1; #endif #if IPR_LOG sc->sc_log_first = IPR_LOG; #endif #ifdef IPR_VJ sl_compress_init(&sc->sc_compr, -1); #ifdef IPR_VJ_USEBUFFER if(!((sc->sc_cbuf = (u_char *)malloc(I4BIPRMAXMTU+128, M_DEVBUF, M_WAITOK)))) { panic("if_ipr.c, ipr_attach: VJ malloc failed"); } #endif #endif sc->sc_updown = SOFT_ENA; /* soft enabled */ sc->sc_dialresp = DSTAT_NONE; /* no response */ sc->sc_lastdialresp = DSTAT_NONE; if_attach(&sc->sc_if); bpfattach(&sc->sc_if, DLT_NULL, sizeof(u_int)); } } /*---------------------------------------------------------------------------* * output a packet to the ISDN B-channel *---------------------------------------------------------------------------*/ static int i4biproutput(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst, struct rtentry *rtp) { struct ipr_softc *sc; int unit; int s; struct ifqueue *ifq; struct ip *ip; s = SPLI4B(); sc = ifp->if_softc; unit = ifp->if_dunit; /* check for IP */ if(dst->sa_family != AF_INET) { if_printf(ifp, "af%d not supported\n", dst->sa_family); m_freem(m); splx(s); sc->sc_if.if_noproto++; sc->sc_if.if_oerrors++; return(EAFNOSUPPORT); } /* check interface state = UP */ if(!(ifp->if_flags & IFF_UP)) { NDBGL4(L4_IPRDBG, "ipr%d: interface is DOWN!", unit); m_freem(m); splx(s); sc->sc_if.if_oerrors++; return(ENETDOWN); } /* dial if necessary */ if(sc->sc_state == ST_IDLE || sc->sc_state == ST_DIALING) { #ifdef NOTDEF switch(sc->sc_dialresp) { case DSTAT_TFAIL: /* transient failure */ NDBGL4(L4_IPRDBG, "ipr%d: transient dial failure!", unit); m_freem(m); iprclearqueues(sc); sc->sc_dialresp = DSTAT_NONE; splx(s); sc->sc_if.if_oerrors++; return(ENETUNREACH); break; case DSTAT_PFAIL: /* permanent failure */ NDBGL4(L4_IPRDBG, "ipr%d: permanent dial failure!", unit); m_freem(m); iprclearqueues(sc); sc->sc_dialresp = DSTAT_NONE; splx(s); sc->sc_if.if_oerrors++; return(EHOSTUNREACH); break; case DSTAT_INONLY: /* no dialout allowed*/ NDBGL4(L4_IPRDBG, "ipr%d: dialout not allowed failure!", unit); m_freem(m); iprclearqueues(sc); sc->sc_dialresp = DSTAT_NONE; splx(s); sc->sc_if.if_oerrors++; return(EHOSTUNREACH); break; } #endif NDBGL4(L4_IPRDBG, "ipr%d: send dial request message!", unit); NDBGL4(L4_DIALST, "ipr%d: setting dial state to ST_DIALING", unit); i4b_l4_dialout(BDRV_IPR, unit); sc->sc_state = ST_DIALING; } #if IPR_LOG if(sc->sc_log_first > 0) { --(sc->sc_log_first); i4b_l4_packet_ind(BDRV_IPR, unit, 1, m ); } #endif /* update access time */ microtime(&sc->sc_if.if_lastchange); /* * check, if type of service indicates interactive, i.e. telnet, * traffic. in case it is interactive, put it into the fast queue, * else (i.e. ftp traffic) put it into the "normal" queue */ ip = mtod(m, struct ip *); /* get ptr to ip header */ if(ip->ip_tos & IPTOS_LOWDELAY) ifq = &sc->sc_fastq; else ifq = (struct ifqueue *)&sc->sc_if.if_snd; /* check for space in choosen send queue */ if(! IF_HANDOFF(ifq, m, NULL)) { NDBGL4(L4_IPRDBG, "ipr%d: send queue full!", unit); splx(s); sc->sc_if.if_oerrors++; return(ENOBUFS); } NDBGL4(L4_IPRDBG, "ipr%d: add packet to send queue!", unit); ipr_tx_queue_empty(unit); splx(s); return (0); } /*---------------------------------------------------------------------------* * process ioctl *---------------------------------------------------------------------------*/ static int i4biprioctl(struct ifnet *ifp, u_long cmd, caddr_t data) { struct ipr_softc *sc = ifp->if_softc; struct ifreq *ifr = (struct ifreq *)data; struct ifaddr *ifa = (struct ifaddr *)data; int s; int error = 0; s = SPLI4B(); switch (cmd) { case SIOCAIFADDR: /* add interface address */ case SIOCSIFADDR: /* set interface address */ case SIOCSIFDSTADDR: /* set interface destination address */ if(ifa->ifa_addr->sa_family != AF_INET) error = EAFNOSUPPORT; else sc->sc_if.if_flags |= IFF_UP; microtime(&sc->sc_if.if_lastchange); break; case SIOCSIFFLAGS: /* set interface flags */ if(!(ifr->ifr_flags & IFF_UP)) { if(sc->sc_if.if_flags & IFF_RUNNING) { /* disconnect ISDN line */ i4b_l4_drvrdisc(BDRV_IPR, ifp->if_dunit); sc->sc_if.if_flags &= ~IFF_RUNNING; } sc->sc_state = ST_IDLE; /* empty queues */ iprclearqueues(sc); } if(ifr->ifr_flags & IFF_DEBUG) { /* enable debug messages */ } microtime(&sc->sc_if.if_lastchange); break; case SIOCSIFMTU: /* set interface MTU */ if(ifr->ifr_mtu > I4BIPRMAXMTU) error = EINVAL; else if(ifr->ifr_mtu < I4BIPRMINMTU) error = EINVAL; else { ifp->if_mtu = ifr->ifr_mtu; microtime(&sc->sc_if.if_lastchange); } break; #if 0 /* not needed for FreeBSD, done in sl_compress_init() (-hm) */ /* need to add an ioctl: set VJ max slot ID * #define IPRIOCSMAXCID _IOW('I', XXX, int) */ #ifdef IPR_VJ case IPRIOCSMAXCID: { struct thread *td = curthread; /* XXX */ if((error = suser(td))) return (error); sl_compress_setup(sc->sc_compr, *(int *)data); } break; #endif #endif /* #if 0 */ default: error = EINVAL; break; } splx(s); return(error); } /*---------------------------------------------------------------------------* * clear the interface's send queues *---------------------------------------------------------------------------*/ static void iprclearqueues(struct ipr_softc *sc) { int x; x = splimp(); IF_DRAIN(&sc->sc_fastq); IF_DRAIN(&sc->sc_if.if_snd); splx(x); } #if I4BIPRACCT /*---------------------------------------------------------------------------* * watchdog routine *---------------------------------------------------------------------------*/ static void iprwatchdog(struct ifnet *ifp) { int unit = ifp->if_dunit; struct ipr_softc *sc = ifp->if_softc; bchan_statistics_t bs; /* get # of bytes in and out from the HSCX driver */ (*isdn_linktab[unit]->bch_stat) (isdn_linktab[unit]->unit, isdn_linktab[unit]->channel, &bs); sc->sc_ioutb += bs.outbytes; sc->sc_iinb += bs.inbytes; if((sc->sc_iinb != sc->sc_linb) || (sc->sc_ioutb != sc->sc_loutb) || sc->sc_fn) { int ri = (sc->sc_iinb - sc->sc_linb)/I4BIPRACCTINTVL; int ro = (sc->sc_ioutb - sc->sc_loutb)/I4BIPRACCTINTVL; if((sc->sc_iinb == sc->sc_linb) && (sc->sc_ioutb == sc->sc_loutb)) sc->sc_fn = 0; else sc->sc_fn = 1; sc->sc_linb = sc->sc_iinb; sc->sc_loutb = sc->sc_ioutb; i4b_l4_accounting(BDRV_IPR, unit, ACCT_DURING, sc->sc_ioutb, sc->sc_iinb, ro, ri, sc->sc_outb, sc->sc_inb); } sc->sc_if.if_timer = I4BIPRACCTINTVL; } #endif /* I4BIPRACCT */ /*===========================================================================* * ISDN INTERFACE ROUTINES *===========================================================================*/ /*---------------------------------------------------------------------------* * start transmitting after connect *---------------------------------------------------------------------------*/ static void i4bipr_connect_startio(struct ipr_softc *sc) { int s = SPLI4B(); if(sc->sc_state == ST_CONNECTED_W) { sc->sc_state = ST_CONNECTED_A; ipr_tx_queue_empty(sc->sc_if.if_dunit); } splx(s); } /*---------------------------------------------------------------------------* * this routine is called from L4 handler at connect time *---------------------------------------------------------------------------*/ static void ipr_connect(int unit, void *cdp) { struct ipr_softc *sc = &ipr_softc[unit]; int s; sc->sc_cdp = (call_desc_t *)cdp; s = SPLI4B(); NDBGL4(L4_DIALST, "ipr%d: setting dial state to ST_CONNECTED", unit); sc->sc_if.if_flags |= IFF_RUNNING; sc->sc_state = ST_CONNECTED_W; sc->sc_dialresp = DSTAT_NONE; sc->sc_lastdialresp = DSTAT_NONE; #if I4BIPRACCT sc->sc_iinb = 0; sc->sc_ioutb = 0; sc->sc_inb = 0; sc->sc_outb = 0; sc->sc_linb = 0; sc->sc_loutb = 0; sc->sc_if.if_timer = I4BIPRACCTINTVL; #endif #ifdef I4BIPRADJFRXP sc->sc_first_pkt = 1; #endif /* * Sometimes ISDN B-channels are switched thru asymmetic. This * means that under such circumstances B-channel data (the first * three packets of a TCP connection in my case) may get lost, * causing a large delay until the connection is started. * When the sending of the very first packet of a TCP connection * is delayed for a to be empirically determined delay (close * to a second in my case) those packets go thru and the TCP * connection comes up "almost" immediately (-hm). */ if(sc->sc_cdp->isdntxdelay > 0) { int delay; if (hz == 100) { delay = sc->sc_cdp->isdntxdelay; /* avoid any rounding */ } else { delay = sc->sc_cdp->isdntxdelay*hz; delay /= 100; } START_TIMER(sc->sc_callout, (TIMEOUT_FUNC_T)i4bipr_connect_startio, (void *)sc, delay); } else { sc->sc_state = ST_CONNECTED_A; ipr_tx_queue_empty(unit); } splx(s); /* we don't need any negotiation - pass event back right now */ i4b_l4_negcomplete(sc->sc_cdp); } /*---------------------------------------------------------------------------* * this routine is called from L4 handler at disconnect time *---------------------------------------------------------------------------*/ static void ipr_disconnect(int unit, void *cdp) { call_desc_t *cd = (call_desc_t *)cdp; struct ipr_softc *sc = &ipr_softc[unit]; /* new stuff to check that the active channel is being closed */ if (cd != sc->sc_cdp) { NDBGL4(L4_IPRDBG, "ipr%d: channel %d not active", cd->driver_unit, cd->channelid); return; } #if I4BIPRACCT sc->sc_if.if_timer = 0; #endif #if IPR_LOG /* show next IPR_LOG packets again */ sc->sc_log_first = IPR_LOG; #endif i4b_l4_accounting(BDRV_IPR, cd->driver_unit, ACCT_FINAL, sc->sc_ioutb, sc->sc_iinb, 0, 0, sc->sc_outb, sc->sc_inb); sc->sc_cdp = (call_desc_t *)0; NDBGL4(L4_DIALST, "setting dial state to ST_IDLE"); sc->sc_dialresp = DSTAT_NONE; sc->sc_lastdialresp = DSTAT_NONE; sc->sc_if.if_flags &= ~IFF_RUNNING; sc->sc_state = ST_IDLE; } /*---------------------------------------------------------------------------* * this routine is used to give a feedback from userland daemon * in case of dial problems *---------------------------------------------------------------------------*/ static void ipr_dialresponse(int unit, int status, cause_t cause) { struct ipr_softc *sc = &ipr_softc[unit]; sc->sc_dialresp = status; NDBGL4(L4_IPRDBG, "ipr%d: last=%d, this=%d", unit, sc->sc_lastdialresp, sc->sc_dialresp); if(status != DSTAT_NONE) { NDBGL4(L4_IPRDBG, "ipr%d: clearing queues", unit); iprclearqueues(sc); } } /*---------------------------------------------------------------------------* * interface soft up/down *---------------------------------------------------------------------------*/ static void ipr_updown(int unit, int updown) { struct ipr_softc *sc = &ipr_softc[unit]; sc->sc_updown = updown; } /*---------------------------------------------------------------------------* * this routine is called from the HSCX interrupt handler * when a new frame (mbuf) has been received and was put on * the rx queue. It is assumed that this routines runs at * pri level splimp() ! Keep it short ! *---------------------------------------------------------------------------*/ static void ipr_rx_data_rdy(int unit) { register struct ipr_softc *sc = &ipr_softc[unit]; register struct mbuf *m; #ifdef IPR_VJ #ifdef IPR_VJ_USEBUFFER u_char *cp = sc->sc_cbuf; #endif int len, c; #endif if((m = *isdn_linktab[unit]->rx_mbuf) == NULL) return; m->m_pkthdr.rcvif = &sc->sc_if; m->m_pkthdr.len = m->m_len; microtime(&sc->sc_if.if_lastchange); #ifdef I4BIPRADJFRXP /* * The very first packet after the B channel is switched thru * has very often several bytes of random data prepended. This * routine looks where the IP header starts and removes the * the bad data. */ if(sc->sc_first_pkt) { unsigned char *mp = m->m_data; int i; sc->sc_first_pkt = 0; for(i = 0; i < m->m_len; i++, mp++) { if( ((*mp & 0xf0) == 0x40) && ((*mp & 0x0f) >= 0x05) ) { m->m_data = mp; m->m_pkthdr.len -= i; break; } } } #endif sc->sc_if.if_ipackets++; sc->sc_if.if_ibytes += m->m_pkthdr.len; #ifdef IPR_VJ if((c = (*(mtod(m, u_char *)) & 0xf0)) != (IPVERSION << 4)) { /* copy data to buffer */ len = m->m_len; #ifdef IPR_VJ_USEBUFFER /* XXX */ m_copydata(m, 0, len, cp); #endif if(c & 0x80) { c = TYPE_COMPRESSED_TCP; } else if(c == TYPE_UNCOMPRESSED_TCP) { #ifdef IPR_VJ_USEBUFFER *cp &= 0x4f; /* XXX */ #else *(mtod(m, u_char *)) &= 0x4f; #endif } /* * We've got something that's not an IP packet. * If compression is enabled, try to decompress it. * Otherwise, if `auto-enable' compression is on and * it's a reasonable packet, decompress it and then * enable compression. Otherwise, drop it. */ if(sc->sc_if.if_flags & IPR_COMPRESS) { #ifdef IPR_VJ_USEBUFFER len = sl_uncompress_tcp(&cp,len,(u_int)c,&sc->sc_compr); #else len = sl_uncompress_tcp((u_char **)&m->m_data, len, (u_int)c, &sc->sc_compr); #endif if(len <= 0) { #ifdef DEBUG_IPR_VJ printf("i4b_ipr, ipr_rx_data_rdy: len <= 0 IPR_COMPRESS!\n"); #endif goto error; } } else if((sc->sc_if.if_flags & IPR_AUTOCOMP) && (c == TYPE_UNCOMPRESSED_TCP) && (len >= 40)) { #ifdef IPR_VJ_USEBUFFER len = sl_uncompress_tcp(&cp,len,(u_int)c,&sc->sc_compr); #else len = sl_uncompress_tcp((u_char **)&m->m_data, len, (u_int)c, &sc->sc_compr); #endif if(len <= 0) { #ifdef DEBUG_IPR_VJ printf("i4b_ipr, ipr_rx_data_rdy: len <= 0 IPR_AUTOCOMP!\n"); #endif goto error; } sc->sc_if.if_flags |= IPR_COMPRESS; } else { #ifdef DEBUG_IPR_VJ printf("i4b_ipr, ipr_input: invalid ip packet!\n"); #endif error: sc->sc_if.if_ierrors++; sc->sc_if.if_collisions++; m_freem(m); return; } #ifdef IPR_VJ_USEBUFFER /* XXX */ m_copyback(m, 0, len, cp); #else m->m_len = m->m_pkthdr.len = len; #endif } #endif #if I4BIPRACCT /* NB. do the accounting after decompression! */ sc->sc_inb += m->m_pkthdr.len; #endif #if IPR_LOG if(sc->sc_log_first > 0) { --(sc->sc_log_first); i4b_l4_packet_ind(BDRV_IPR, unit, 0, m ); } #endif if(sc->sc_if.if_bpf) { /* prepend the address family as a four byte field */ struct mbuf mm; u_int af = AF_INET; mm.m_next = m; mm.m_len = 4; mm.m_data = (char *)⁡ BPF_MTAP(&sc->sc_if, &mm); } if(netisr_queue(NETISR_IP, m)) /* (0) on success. */ { NDBGL4(L4_IPRDBG, "ipr%d: ipintrq full!", unit); sc->sc_if.if_ierrors++; sc->sc_if.if_iqdrops++; } } /*---------------------------------------------------------------------------* * this routine is called from the HSCX interrupt handler * when the last frame has been sent out and there is no * further frame (mbuf) in the tx queue. *---------------------------------------------------------------------------*/ static void ipr_tx_queue_empty(int unit) { register struct ipr_softc *sc = &ipr_softc[unit]; register struct mbuf *m; #ifdef IPR_VJ struct ip *ip; #endif int x = 0; if(sc->sc_state != ST_CONNECTED_A) return; for(;;) { IF_DEQUEUE(&sc->sc_fastq, m); if(m) { sc->sc_if.if_omcasts++; } else { IF_DEQUEUE(&sc->sc_if.if_snd, m); if(m == NULL) break; } microtime(&sc->sc_if.if_lastchange); if(sc->sc_if.if_bpf) { /* prepend the address family as a four byte field */ struct mbuf mm; u_int af = AF_INET; mm.m_next = m; mm.m_len = 4; mm.m_data = (char *)⁡ BPF_MTAP(&sc->sc_if, &mm); } #if I4BIPRACCT sc->sc_outb += m->m_pkthdr.len; /* size before compression */ #endif #ifdef IPR_VJ if((ip = mtod(m, struct ip *))->ip_p == IPPROTO_TCP) { if(sc->sc_if.if_flags & IPR_COMPRESS) { *mtod(m, u_char *) |= sl_compress_tcp(m, ip, &sc->sc_compr, 1); } } #endif x = 1; IF_LOCK(isdn_linktab[unit]->tx_queue); if(_IF_QFULL(isdn_linktab[unit]->tx_queue)) { NDBGL4(L4_IPRDBG, "ipr%d: tx queue full!", unit); m_freem(m); } else { sc->sc_if.if_obytes += m->m_pkthdr.len; sc->sc_if.if_opackets++; _IF_ENQUEUE(isdn_linktab[unit]->tx_queue, m); } IF_UNLOCK(isdn_linktab[unit]->tx_queue); } if(x) (*isdn_linktab[unit]->bch_tx_start)(isdn_linktab[unit]->unit, isdn_linktab[unit]->channel); } /*---------------------------------------------------------------------------* * this routine is called from the HSCX interrupt handler * each time a packet is received or transmitted. It should * be used to implement an activity timeout mechanism. *---------------------------------------------------------------------------*/ static void ipr_activity(int unit, int rxtx) { ipr_softc[unit].sc_cdp->last_active_time = SECOND; } /*---------------------------------------------------------------------------* * return this drivers linktab address *---------------------------------------------------------------------------*/ drvr_link_t * ipr_ret_linktab(int unit) { return(&ipr_drvr_linktab[unit]); } /*---------------------------------------------------------------------------* * setup the isdn_linktab for this driver *---------------------------------------------------------------------------*/ void ipr_set_linktab(int unit, isdn_link_t *ilt) { isdn_linktab[unit] = ilt; } /*---------------------------------------------------------------------------* * initialize this drivers linktab *---------------------------------------------------------------------------*/ static void ipr_init_linktab(int unit) { ipr_drvr_linktab[unit].unit = unit; ipr_drvr_linktab[unit].bch_rx_data_ready = ipr_rx_data_rdy; ipr_drvr_linktab[unit].bch_tx_queue_empty = ipr_tx_queue_empty; ipr_drvr_linktab[unit].bch_activity = ipr_activity; ipr_drvr_linktab[unit].line_connected = ipr_connect; ipr_drvr_linktab[unit].line_disconnected = ipr_disconnect; ipr_drvr_linktab[unit].dial_response = ipr_dialresponse; ipr_drvr_linktab[unit].updown_ind = ipr_updown; } /*===========================================================================*/