2 * Copyright (c) 1997, 2001 Hellmuth Michaelis. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 *---------------------------------------------------------------------------
27 * i4b_ipr.c - isdn4bsd IP over raw HDLC ISDN network driver
28 * ---------------------------------------------------------
30 * $FreeBSD: src/sys/i4b/driver/i4b_ipr.c,v 1.8.2.3 2001/10/27 15:48:17 hm Exp $
31 * $DragonFly: src/sys/net/i4b/driver/i4b_ipr.c,v 1.2 2003/06/17 04:28:39 dillon Exp $
33 * last edit-date: [Fri Oct 26 19:32:38 2001]
35 *---------------------------------------------------------------------------*
37 * statistics counter usage (interface lifetime):
38 * ----------------------------------------------
39 * sc->sc_if.if_ipackets # of received packets
40 * sc->sc_if.if_ierrors # of error packets not going to upper layers
41 * sc->sc_if.if_opackets # of transmitted packets
42 * sc->sc_if.if_oerrors # of error packets not being transmitted
43 * sc->sc_if.if_collisions # of invalid ip packets after VJ decompression
44 * sc->sc_if.if_ibytes # of bytes coming in from the line (before VJ)
45 * sc->sc_if.if_obytes # of bytes going out to the line (after VJ)
46 * sc->sc_if.if_imcasts (currently unused)
47 * sc->sc_if.if_omcasts # of frames sent out of the fastqueue
48 * sc->sc_if.if_iqdrops # of frames dropped on input because queue full
49 * sc->sc_if.if_noproto # of frames dropped on output because !AF_INET
51 * statistics counter usage (connection lifetime):
52 * -----------------------------------------------
53 * sc->sc_iinb # of ISDN incoming bytes from HSCX
54 * sc->sc_ioutb # of ISDN outgoing bytes from HSCX
55 * sc->sc_inb # of incoming bytes after decompression
56 * sc->sc_outb # of outgoing bytes before compression
58 *---------------------------------------------------------------------------*/
68 #include <sys/param.h>
69 #include <sys/systm.h>
71 #include <sys/socket.h>
72 #include <sys/errno.h>
74 #if defined(__FreeBSD__)
75 #include <sys/ioccom.h>
76 #include <sys/sockio.h>
78 #include <sys/malloc.h>
81 #include <sys/ioctl.h>
84 #if defined(__NetBSD__) && __NetBSD_Version__ >= 104230000
85 #include <sys/callout.h>
88 #include <sys/kernel.h>
91 #include <net/if_types.h>
92 #include <net/netisr.h>
94 #include <netinet/in.h>
95 #include <netinet/in_systm.h>
96 #include <netinet/in_var.h>
97 #include <netinet/ip.h>
100 #include <net/slcompress.h>
101 #define IPR_COMPRESS IFF_LINK0 /* compress TCP traffic */
102 #define IPR_AUTOCOMP IFF_LINK1 /* auto-enable TCP compression */
104 /*---------------------------------------------------------------------------
105 * NOTICE: using NO separate buffer relies on the assumption, that the HSCX
106 * IRQ handler _always_ allocates a single, continuous mbuf cluster large
107 * enough to hold the maximum MTU size if the ipr interface !
109 * CAUTION: i have re-defined IPR_VJ_USEBUFFER because it makes problems
110 * with 2 i4b's back to back running cvs over ssh, cvs simply
111 * aborts because it gets bad data. Everything else (telnet/ftp?etc)
113 *---------------------------------------------------------------------------*/
114 #define IPR_VJ_USEBUFFER /* define to use an allocated separate buffer*/
115 /* undef to uncompress in the mbuf itself */
118 #if defined(__FreeBSD_version) && __FreeBSD_version >= 400008
121 #include "bpfilter.h"
124 #if NBPFILTER > 0 || NBPF > 0
125 #include <sys/time.h>
130 #include <machine/i4b_ioctl.h>
131 #include <machine/i4b_debug.h>
133 #include <i4b/i4b_debug.h>
134 #include <i4b/i4b_ioctl.h>
137 #include <i4b/include/i4b_global.h>
138 #include <i4b/include/i4b_l3l4.h>
140 #include <i4b/layer4/i4b_l4.h>
143 #include <machine/cpu.h> /* For softnet */
147 #define IPR_FMT "ipr%d: "
148 #define IPR_ARG(sc) ((sc)->sc_if.if_unit)
149 #define PDEVSTATIC static
150 #elif defined(__bsdi__)
151 #define IPR_FMT "ipr%d: "
152 #define IPR_ARG(sc) ((sc)->sc_if.if_unit)
153 #define PDEVSTATIC /* not static */
155 #define IPR_FMT "%s: "
156 #define IPR_ARG(sc) ((sc)->sc_if.if_xname)
157 #define PDEVSTATIC /* not static */
160 #define I4BIPRMTU 1500 /* regular MTU */
161 #define I4BIPRMAXMTU 2000 /* max MTU */
162 #define I4BIPRMINMTU 500 /* min MTU */
164 #define I4BIPRMAXQLEN 50 /* max queue length */
166 #define I4BIPRACCT 1 /* enable accounting messages */
167 #define I4BIPRACCTINTVL 2 /* accounting msg interval in secs */
168 #define I4BIPRADJFRXP 1 /* adjust 1st rxd packet */
170 /* initialized by L4 */
172 static drvr_link_t ipr_drvr_linktab[NI4BIPR];
173 static isdn_link_t *isdn_linktab[NI4BIPR];
176 struct ifnet sc_if; /* network-visible interface */
177 int sc_state; /* state of the interface */
180 int sc_unit; /* unit number for Net/OpenBSD */
183 call_desc_t *sc_cdp; /* ptr to call descriptor */
184 int sc_updown; /* soft state of interface */
185 struct ifqueue sc_fastq; /* interactive traffic */
186 int sc_dialresp; /* dialresponse */
187 int sc_lastdialresp;/* last dialresponse */
190 int sc_iinb; /* isdn driver # of inbytes */
191 int sc_ioutb; /* isdn driver # of outbytes */
192 int sc_inb; /* # of bytes rx'd */
193 int sc_outb; /* # of bytes tx'd */
194 int sc_linb; /* last # of bytes rx'd */
195 int sc_loutb; /* last # of bytes tx'd */
196 int sc_fn; /* flag, first null acct */
199 #if defined(__NetBSD__) && __NetBSD_Version__ >= 104230000
200 struct callout sc_callout;
202 #if defined(__FreeBSD__)
203 struct callout_handle sc_callout;
207 int sc_first_pkt; /* flag, first rxd packet */
210 int sc_log_first; /* log first n packets */
214 struct slcompress sc_compr; /* tcp compression data */
215 #ifdef IPR_VJ_USEBUFFER
216 u_char *sc_cbuf; /* tcp decompression buffer */
220 } ipr_softc[NI4BIPR];
223 ST_IDLE, /* initialized, ready, idle */
224 ST_DIALING, /* dialling out to remote */
225 ST_CONNECTED_W, /* connected to remote */
226 ST_CONNECTED_A, /* connected to remote */
229 #if defined(__FreeBSD__) || defined(__bsdi__)
230 #define THE_UNIT sc->sc_if.if_unit
232 #define THE_UNIT sc->sc_unit
235 #if defined __FreeBSD__ || defined __NetBSD__
236 # define IOCTL_CMD_T u_long
238 # define IOCTL_CMD_T int
242 PDEVSTATIC void i4biprattach(void *);
243 PSEUDO_SET(i4biprattach, i4b_ipr);
244 static int i4biprioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, caddr_t data);
246 PDEVSTATIC void i4biprattach __P((void));
247 static int i4biprioctl(struct ifnet *ifp, u_long cmd, caddr_t data);
251 static int iprwatchdog(int unit);
253 static void iprwatchdog(struct ifnet *ifp);
255 static void ipr_init_linktab(int unit);
256 static void ipr_tx_queue_empty(int unit);
257 static int i4biproutput(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst, struct rtentry *rtp);
258 static void iprclearqueues(struct ipr_softc *sc);
260 /*===========================================================================*
261 * DEVICE DRIVER ROUTINES
262 *===========================================================================*/
264 /*---------------------------------------------------------------------------*
265 * interface attach routine at kernel boot time
266 *---------------------------------------------------------------------------*/
269 i4biprattach(void *dummy)
274 struct ipr_softc *sc = ipr_softc;
278 printf("i4bipr: %d IP over raw HDLC ISDN device(s) attached (VJ header compression)\n", NI4BIPR);
280 printf("i4bipr: %d IP over raw HDLC ISDN device(s) attached\n", NI4BIPR);
283 for(i=0; i < NI4BIPR; sc++, i++)
287 NDBGL4(L4_DIALST, "setting dial state to ST_IDLE");
289 sc->sc_state = ST_IDLE;
292 sc->sc_if.if_name = "ipr";
293 sc->sc_if.if_unit = i;
294 #elif defined(__bsdi__)
295 sc->sc_if.if_name = "ipr";
296 sc->sc_if.if_unit = i;
298 sprintf(sc->sc_if.if_xname, "ipr%d", i);
299 sc->sc_if.if_softc = sc;
304 sc->sc_if.if_flags = IFF_POINTOPOINT | IFF_SIMPLEX | IPR_AUTOCOMP;
306 sc->sc_if.if_flags = IFF_POINTOPOINT | IFF_SIMPLEX;
309 #if defined(__NetBSD__) && __NetBSD_Version__ >= 104230000
310 callout_init(&sc->sc_callout);
313 sc->sc_if.if_mtu = I4BIPRMTU;
314 sc->sc_if.if_type = IFT_ISDNBASIC;
315 sc->sc_if.if_ioctl = i4biprioctl;
316 sc->sc_if.if_output = i4biproutput;
318 sc->sc_if.if_snd.ifq_maxlen = I4BIPRMAXQLEN;
319 sc->sc_fastq.ifq_maxlen = I4BIPRMAXQLEN;
321 #if defined (__FreeBSD__) && __FreeBSD__ > 4
322 mtx_init(&sc->sc_fastq.ifq_mtx, "i4b_ipr_fastq", MTX_DEF);
324 sc->sc_if.if_ipackets = 0;
325 sc->sc_if.if_ierrors = 0;
326 sc->sc_if.if_opackets = 0;
327 sc->sc_if.if_oerrors = 0;
328 sc->sc_if.if_collisions = 0;
329 sc->sc_if.if_ibytes = 0;
330 sc->sc_if.if_obytes = 0;
331 sc->sc_if.if_imcasts = 0;
332 sc->sc_if.if_omcasts = 0;
333 sc->sc_if.if_iqdrops = 0;
334 sc->sc_if.if_noproto = 0;
337 sc->sc_if.if_timer = 0;
338 sc->sc_if.if_watchdog = iprwatchdog;
348 sc->sc_log_first = IPR_LOG;
353 sl_compress_init(&sc->sc_compr, -1);
355 sl_compress_init(&sc->sc_compr);
358 #ifdef IPR_VJ_USEBUFFER
360 (u_char *)malloc(I4BIPRMAXMTU+128, M_DEVBUF, M_WAITOK))))
362 panic("if_ipr.c, ipr_attach: VJ malloc failed");
366 sc->sc_updown = SOFT_ENA; /* soft enabled */
367 sc->sc_dialresp = DSTAT_NONE; /* no response */
368 sc->sc_lastdialresp = DSTAT_NONE;
370 if_attach(&sc->sc_if);
372 #if NBPFILTER > 0 || NBPF > 0
374 bpfattach(&sc->sc_if, DLT_NULL, sizeof(u_int));
376 bpfattach(&sc->sc_if.if_bpf, &sc->sc_if, DLT_NULL, sizeof(u_int));
382 /*---------------------------------------------------------------------------*
383 * output a packet to the ISDN B-channel
384 *---------------------------------------------------------------------------*/
386 i4biproutput(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst,
389 struct ipr_softc *sc;
397 #if defined(__FreeBSD__) || defined(__bsdi__)
399 sc = &ipr_softc[unit];
407 if(dst->sa_family != AF_INET)
409 printf(IPR_FMT "af%d not supported\n", IPR_ARG(sc), dst->sa_family);
412 sc->sc_if.if_noproto++;
413 sc->sc_if.if_oerrors++;
414 return(EAFNOSUPPORT);
417 /* check interface state = UP */
419 if(!(ifp->if_flags & IFF_UP))
421 NDBGL4(L4_IPRDBG, "ipr%d: interface is DOWN!", unit);
424 sc->sc_if.if_oerrors++;
428 /* dial if necessary */
430 if(sc->sc_state == ST_IDLE || sc->sc_state == ST_DIALING)
434 switch(sc->sc_dialresp)
436 case DSTAT_TFAIL: /* transient failure */
437 NDBGL4(L4_IPRDBG, "ipr%d: transient dial failure!", unit);
440 sc->sc_dialresp = DSTAT_NONE;
442 sc->sc_if.if_oerrors++;
446 case DSTAT_PFAIL: /* permanent failure */
447 NDBGL4(L4_IPRDBG, "ipr%d: permanent dial failure!", unit);
450 sc->sc_dialresp = DSTAT_NONE;
452 sc->sc_if.if_oerrors++;
453 return(EHOSTUNREACH);
456 case DSTAT_INONLY: /* no dialout allowed*/
457 NDBGL4(L4_IPRDBG, "ipr%d: dialout not allowed failure!", unit);
460 sc->sc_dialresp = DSTAT_NONE;
462 sc->sc_if.if_oerrors++;
463 return(EHOSTUNREACH);
468 NDBGL4(L4_IPRDBG, "ipr%d: send dial request message!", unit);
469 NDBGL4(L4_DIALST, "ipr%d: setting dial state to ST_DIALING", unit);
470 i4b_l4_dialout(BDRV_IPR, unit);
471 sc->sc_state = ST_DIALING;
475 if(sc->sc_log_first > 0)
477 --(sc->sc_log_first);
478 i4b_l4_packet_ind(BDRV_IPR, unit, 1, m );
482 /* update access time */
484 microtime(&sc->sc_if.if_lastchange);
487 * check, if type of service indicates interactive, i.e. telnet,
488 * traffic. in case it is interactive, put it into the fast queue,
489 * else (i.e. ftp traffic) put it into the "normal" queue
492 ip = mtod(m, struct ip *); /* get ptr to ip header */
494 if(ip->ip_tos & IPTOS_LOWDELAY)
497 ifq = &sc->sc_if.if_snd;
499 /* check for space in choosen send queue */
501 #if defined (__FreeBSD__) && __FreeBSD__ > 4
502 if(! IF_HANDOFF(ifq, m, NULL))
504 NDBGL4(L4_IPRDBG, "ipr%d: send queue full!", unit);
506 sc->sc_if.if_oerrors++;
512 NDBGL4(L4_IPRDBG, "ipr%d: send queue full!", unit);
516 sc->sc_if.if_oerrors++;
523 NDBGL4(L4_IPRDBG, "ipr%d: add packet to send queue!", unit);
525 ipr_tx_queue_empty(unit);
532 /*---------------------------------------------------------------------------*
534 *---------------------------------------------------------------------------*/
537 i4biprioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, caddr_t data)
540 i4biprioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
543 #if defined(__FreeBSD__) || defined(__bsdi__)
544 struct ipr_softc *sc = &ipr_softc[ifp->if_unit];
546 struct ipr_softc *sc = ifp->if_softc;
549 struct ifreq *ifr = (struct ifreq *)data;
550 struct ifaddr *ifa = (struct ifaddr *)data;
558 case SIOCAIFADDR: /* add interface address */
559 case SIOCSIFADDR: /* set interface address */
560 case SIOCSIFDSTADDR: /* set interface destination address */
561 if(ifa->ifa_addr->sa_family != AF_INET)
562 error = EAFNOSUPPORT;
564 sc->sc_if.if_flags |= IFF_UP;
565 microtime(&sc->sc_if.if_lastchange);
568 case SIOCSIFFLAGS: /* set interface flags */
569 if(!(ifr->ifr_flags & IFF_UP))
571 if(sc->sc_if.if_flags & IFF_RUNNING)
573 /* disconnect ISDN line */
574 #if defined(__FreeBSD__) || defined(__bsdi__)
575 i4b_l4_drvrdisc(BDRV_IPR, ifp->if_unit);
577 i4b_l4_drvrdisc(BDRV_IPR, sc->sc_unit);
579 sc->sc_if.if_flags &= ~IFF_RUNNING;
582 sc->sc_state = ST_IDLE;
589 if(ifr->ifr_flags & IFF_DEBUG)
591 /* enable debug messages */
594 microtime(&sc->sc_if.if_lastchange);
597 #if !defined(__OpenBSD__)
598 case SIOCSIFMTU: /* set interface MTU */
599 if(ifr->ifr_mtu > I4BIPRMAXMTU)
601 else if(ifr->ifr_mtu < I4BIPRMINMTU)
605 ifp->if_mtu = ifr->ifr_mtu;
606 microtime(&sc->sc_if.if_lastchange);
609 #endif /* __OPENBSD__ */
612 /* not needed for FreeBSD, done in sl_compress_init() (-hm) */
614 /* need to add an ioctl: set VJ max slot ID
615 * #define IPRIOCSMAXCID _IOW('I', XXX, int)
620 struct proc *p = curproc; /* XXX */
622 #if defined(__FreeBSD_version) && __FreeBSD_version >= 400005
623 if((error = suser(p)) != 0)
625 if((error = suser(p->p_ucred, &p->p_acflag)) != 0)
628 sl_compress_setup(sc->sc_compr, *(int *)data);
643 /*---------------------------------------------------------------------------*
644 * clear the interface's send queues
645 *---------------------------------------------------------------------------*/
647 iprclearqueues(struct ipr_softc *sc)
651 #if defined (__FreeBSD__) && __FreeBSD__ > 4
653 IF_DRAIN(&sc->sc_fastq);
654 IF_DRAIN(&sc->sc_if.if_snd);
662 IF_DEQUEUE(&sc->sc_fastq, m);
673 IF_DEQUEUE(&sc->sc_if.if_snd, m);
684 /*---------------------------------------------------------------------------*
686 *---------------------------------------------------------------------------*/
689 iprwatchdog(int unit)
693 iprwatchdog(struct ifnet *ifp)
697 int unit = ifp->if_unit;
698 struct ipr_softc *sc = &ipr_softc[unit];
699 #elif defined(__bsdi__)
700 struct ipr_softc *sc = &ipr_softc[unit];
701 struct ifnet *ifp = &ipr_softc[unit].sc_if;
703 struct ipr_softc *sc = ifp->if_softc;
704 int unit = sc->sc_unit;
706 bchan_statistics_t bs;
708 /* get # of bytes in and out from the HSCX driver */
710 (*isdn_linktab[unit]->bch_stat)
711 (isdn_linktab[unit]->unit, isdn_linktab[unit]->channel, &bs);
713 sc->sc_ioutb += bs.outbytes;
714 sc->sc_iinb += bs.inbytes;
716 if((sc->sc_iinb != sc->sc_linb) || (sc->sc_ioutb != sc->sc_loutb) || sc->sc_fn)
718 int ri = (sc->sc_iinb - sc->sc_linb)/I4BIPRACCTINTVL;
719 int ro = (sc->sc_ioutb - sc->sc_loutb)/I4BIPRACCTINTVL;
721 if((sc->sc_iinb == sc->sc_linb) && (sc->sc_ioutb == sc->sc_loutb))
726 sc->sc_linb = sc->sc_iinb;
727 sc->sc_loutb = sc->sc_ioutb;
729 i4b_l4_accounting(BDRV_IPR, unit, ACCT_DURING,
730 sc->sc_ioutb, sc->sc_iinb, ro, ri, sc->sc_outb, sc->sc_inb);
732 sc->sc_if.if_timer = I4BIPRACCTINTVL;
737 #endif /* I4BIPRACCT */
739 /*===========================================================================*
740 * ISDN INTERFACE ROUTINES
741 *===========================================================================*/
743 /*---------------------------------------------------------------------------*
744 * start transmitting after connect
745 *---------------------------------------------------------------------------*/
747 i4bipr_connect_startio(struct ipr_softc *sc)
751 if(sc->sc_state == ST_CONNECTED_W)
753 sc->sc_state = ST_CONNECTED_A;
754 ipr_tx_queue_empty(THE_UNIT);
760 /*---------------------------------------------------------------------------*
761 * this routine is called from L4 handler at connect time
762 *---------------------------------------------------------------------------*/
764 ipr_connect(int unit, void *cdp)
766 struct ipr_softc *sc = &ipr_softc[unit];
769 sc->sc_cdp = (call_desc_t *)cdp;
773 NDBGL4(L4_DIALST, "ipr%d: setting dial state to ST_CONNECTED", unit);
775 sc->sc_if.if_flags |= IFF_RUNNING;
776 sc->sc_state = ST_CONNECTED_W;
778 sc->sc_dialresp = DSTAT_NONE;
779 sc->sc_lastdialresp = DSTAT_NONE;
788 sc->sc_if.if_timer = I4BIPRACCTINTVL;
792 sc->sc_first_pkt = 1;
796 * Sometimes ISDN B-channels are switched thru asymmetic. This
797 * means that under such circumstances B-channel data (the first
798 * three packets of a TCP connection in my case) may get lost,
799 * causing a large delay until the connection is started.
800 * When the sending of the very first packet of a TCP connection
801 * is delayed for a to be empirically determined delay (close
802 * to a second in my case) those packets go thru and the TCP
803 * connection comes up "almost" immediately (-hm).
806 if(sc->sc_cdp->isdntxdelay > 0)
811 delay = sc->sc_cdp->isdntxdelay; /* avoid any rounding */
813 delay = sc->sc_cdp->isdntxdelay*hz;
817 START_TIMER(sc->sc_callout, (TIMEOUT_FUNC_T)i4bipr_connect_startio, (void *)sc, delay);
821 sc->sc_state = ST_CONNECTED_A;
822 ipr_tx_queue_empty(unit);
827 /* we don't need any negotiation - pass event back right now */
828 i4b_l4_negcomplete(sc->sc_cdp);
831 /*---------------------------------------------------------------------------*
832 * this routine is called from L4 handler at disconnect time
833 *---------------------------------------------------------------------------*/
835 ipr_disconnect(int unit, void *cdp)
837 call_desc_t *cd = (call_desc_t *)cdp;
838 struct ipr_softc *sc = &ipr_softc[unit];
840 /* new stuff to check that the active channel is being closed */
842 if (cd != sc->sc_cdp)
844 NDBGL4(L4_IPRDBG, "ipr%d: channel %d not active",
845 cd->driver_unit, cd->channelid);
850 sc->sc_if.if_timer = 0;
853 /* show next IPR_LOG packets again */
854 sc->sc_log_first = IPR_LOG;
857 i4b_l4_accounting(BDRV_IPR, cd->driver_unit, ACCT_FINAL,
858 sc->sc_ioutb, sc->sc_iinb, 0, 0, sc->sc_outb, sc->sc_inb);
860 sc->sc_cdp = (call_desc_t *)0;
862 NDBGL4(L4_DIALST, "setting dial state to ST_IDLE");
864 sc->sc_dialresp = DSTAT_NONE;
865 sc->sc_lastdialresp = DSTAT_NONE;
867 sc->sc_if.if_flags &= ~IFF_RUNNING;
868 sc->sc_state = ST_IDLE;
871 /*---------------------------------------------------------------------------*
872 * this routine is used to give a feedback from userland daemon
873 * in case of dial problems
874 *---------------------------------------------------------------------------*/
876 ipr_dialresponse(int unit, int status, cause_t cause)
878 struct ipr_softc *sc = &ipr_softc[unit];
879 sc->sc_dialresp = status;
881 NDBGL4(L4_IPRDBG, "ipr%d: last=%d, this=%d",
882 unit, sc->sc_lastdialresp, sc->sc_dialresp);
884 if(status != DSTAT_NONE)
886 NDBGL4(L4_IPRDBG, "ipr%d: clearing queues", unit);
891 /*---------------------------------------------------------------------------*
892 * interface soft up/down
893 *---------------------------------------------------------------------------*/
895 ipr_updown(int unit, int updown)
897 struct ipr_softc *sc = &ipr_softc[unit];
898 sc->sc_updown = updown;
901 /*---------------------------------------------------------------------------*
902 * this routine is called from the HSCX interrupt handler
903 * when a new frame (mbuf) has been received and was put on
904 * the rx queue. It is assumed that this routines runs at
905 * pri level splimp() ! Keep it short !
906 *---------------------------------------------------------------------------*/
908 ipr_rx_data_rdy(int unit)
910 register struct ipr_softc *sc = &ipr_softc[unit];
911 register struct mbuf *m;
913 #ifdef IPR_VJ_USEBUFFER
914 u_char *cp = sc->sc_cbuf;
919 if((m = *isdn_linktab[unit]->rx_mbuf) == NULL)
922 m->m_pkthdr.rcvif = &sc->sc_if;
924 m->m_pkthdr.len = m->m_len;
926 microtime(&sc->sc_if.if_lastchange);
931 * The very first packet after the B channel is switched thru
932 * has very often several bytes of random data prepended. This
933 * routine looks where the IP header starts and removes the
939 unsigned char *mp = m->m_data;
942 sc->sc_first_pkt = 0;
944 for(i = 0; i < m->m_len; i++, mp++)
946 if( ((*mp & 0xf0) == 0x40) &&
947 ((*mp & 0x0f) >= 0x05) )
950 m->m_pkthdr.len -= i;
957 sc->sc_if.if_ipackets++;
958 sc->sc_if.if_ibytes += m->m_pkthdr.len;
961 if((c = (*(mtod(m, u_char *)) & 0xf0)) != (IPVERSION << 4))
963 /* copy data to buffer */
967 #ifdef IPR_VJ_USEBUFFER
968 /* XXX */ m_copydata(m, 0, len, cp);
973 c = TYPE_COMPRESSED_TCP;
975 else if(c == TYPE_UNCOMPRESSED_TCP)
977 #ifdef IPR_VJ_USEBUFFER
978 *cp &= 0x4f; /* XXX */
980 *(mtod(m, u_char *)) &= 0x4f;
985 * We've got something that's not an IP packet.
986 * If compression is enabled, try to decompress it.
987 * Otherwise, if `auto-enable' compression is on and
988 * it's a reasonable packet, decompress it and then
989 * enable compression. Otherwise, drop it.
991 if(sc->sc_if.if_flags & IPR_COMPRESS)
993 #ifdef IPR_VJ_USEBUFFER
994 len = sl_uncompress_tcp(&cp,len,(u_int)c,&sc->sc_compr);
996 len = sl_uncompress_tcp((u_char **)&m->m_data, len,
997 (u_int)c, &sc->sc_compr);
1003 printf("i4b_ipr, ipr_rx_data_rdy: len <= 0 IPR_COMPRESS!\n");
1008 else if((sc->sc_if.if_flags & IPR_AUTOCOMP) &&
1009 (c == TYPE_UNCOMPRESSED_TCP) && (len >= 40))
1011 #ifdef IPR_VJ_USEBUFFER
1012 len = sl_uncompress_tcp(&cp,len,(u_int)c,&sc->sc_compr);
1014 len = sl_uncompress_tcp((u_char **)&m->m_data, len,
1015 (u_int)c, &sc->sc_compr);
1021 printf("i4b_ipr, ipr_rx_data_rdy: len <= 0 IPR_AUTOCOMP!\n");
1026 sc->sc_if.if_flags |= IPR_COMPRESS;
1031 printf("i4b_ipr, ipr_input: invalid ip packet!\n");
1035 sc->sc_if.if_ierrors++;
1036 sc->sc_if.if_collisions++;
1040 #ifdef IPR_VJ_USEBUFFER
1041 /* XXX */ m_copyback(m, 0, len, cp);
1043 m->m_len = m->m_pkthdr.len = len;
1049 /* NB. do the accounting after decompression! */
1050 sc->sc_inb += m->m_pkthdr.len;
1053 if(sc->sc_log_first > 0)
1055 --(sc->sc_log_first);
1056 i4b_l4_packet_ind(BDRV_IPR, unit, 0, m );
1060 #if NBPFILTER > 0 || NBPF > 0
1061 if(sc->sc_if.if_bpf)
1063 /* prepend the address family as a four byte field */
1068 mm.m_data = (char *)⁡
1071 bpf_mtap(&sc->sc_if, &mm);
1073 bpf_mtap(sc->sc_if.if_bpf, &mm);
1076 #endif /* NBPFILTER > 0 || NBPF > 0 */
1078 #if defined (__FreeBSD__) && __FreeBSD__ > 4
1079 if(! IF_HANDOFF(&ipintrq, m, NULL))
1081 NDBGL4(L4_IPRDBG, "ipr%d: ipintrq full!", unit);
1082 sc->sc_if.if_ierrors++;
1083 sc->sc_if.if_iqdrops++;
1087 schednetisr(NETISR_IP);
1090 if(IF_QFULL(&ipintrq))
1092 NDBGL4(L4_IPRDBG, "ipr%d: ipintrq full!", unit);
1094 sc->sc_if.if_ierrors++;
1095 sc->sc_if.if_iqdrops++;
1100 IF_ENQUEUE(&ipintrq, m);
1101 schednetisr(NETISR_IP);
1106 /*---------------------------------------------------------------------------*
1107 * this routine is called from the HSCX interrupt handler
1108 * when the last frame has been sent out and there is no
1109 * further frame (mbuf) in the tx queue.
1110 *---------------------------------------------------------------------------*/
1112 ipr_tx_queue_empty(int unit)
1114 register struct ipr_softc *sc = &ipr_softc[unit];
1115 register struct mbuf *m;
1121 if(sc->sc_state != ST_CONNECTED_A)
1126 IF_DEQUEUE(&sc->sc_fastq, m);
1129 sc->sc_if.if_omcasts++;
1133 IF_DEQUEUE(&sc->sc_if.if_snd, m);
1138 microtime(&sc->sc_if.if_lastchange);
1140 #if NBPFILTER > 0 || NBPF > 0
1141 if(sc->sc_if.if_bpf)
1143 /* prepend the address family as a four byte field */
1149 mm.m_data = (char *)⁡
1152 bpf_mtap(&sc->sc_if, &mm);
1154 bpf_mtap(sc->sc_if.if_bpf, &mm);
1157 #endif /* NBPFILTER */
1160 sc->sc_outb += m->m_pkthdr.len; /* size before compression */
1164 if((ip = mtod(m, struct ip *))->ip_p == IPPROTO_TCP)
1166 if(sc->sc_if.if_flags & IPR_COMPRESS)
1168 *mtod(m, u_char *) |= sl_compress_tcp(m, ip,
1175 IF_LOCK(isdn_linktab[unit]->tx_queue);
1176 if(_IF_QFULL(isdn_linktab[unit]->tx_queue))
1178 NDBGL4(L4_IPRDBG, "ipr%d: tx queue full!", unit);
1183 sc->sc_if.if_obytes += m->m_pkthdr.len;
1185 sc->sc_if.if_opackets++;
1187 _IF_ENQUEUE(isdn_linktab[unit]->tx_queue, m);
1190 IF_UNLOCK(isdn_linktab[unit]->tx_queue);
1194 (*isdn_linktab[unit]->bch_tx_start)(isdn_linktab[unit]->unit, isdn_linktab[unit]->channel);
1197 /*---------------------------------------------------------------------------*
1198 * this routine is called from the HSCX interrupt handler
1199 * each time a packet is received or transmitted. It should
1200 * be used to implement an activity timeout mechanism.
1201 *---------------------------------------------------------------------------*/
1203 ipr_activity(int unit, int rxtx)
1205 ipr_softc[unit].sc_cdp->last_active_time = SECOND;
1208 /*---------------------------------------------------------------------------*
1209 * return this drivers linktab address
1210 *---------------------------------------------------------------------------*/
1212 ipr_ret_linktab(int unit)
1214 return(&ipr_drvr_linktab[unit]);
1217 /*---------------------------------------------------------------------------*
1218 * setup the isdn_linktab for this driver
1219 *---------------------------------------------------------------------------*/
1221 ipr_set_linktab(int unit, isdn_link_t *ilt)
1223 isdn_linktab[unit] = ilt;
1226 /*---------------------------------------------------------------------------*
1227 * initialize this drivers linktab
1228 *---------------------------------------------------------------------------*/
1230 ipr_init_linktab(int unit)
1232 ipr_drvr_linktab[unit].unit = unit;
1233 ipr_drvr_linktab[unit].bch_rx_data_ready = ipr_rx_data_rdy;
1234 ipr_drvr_linktab[unit].bch_tx_queue_empty = ipr_tx_queue_empty;
1235 ipr_drvr_linktab[unit].bch_activity = ipr_activity;
1236 ipr_drvr_linktab[unit].line_connected = ipr_connect;
1237 ipr_drvr_linktab[unit].line_disconnected = ipr_disconnect;
1238 ipr_drvr_linktab[unit].dial_response = ipr_dialresponse;
1239 ipr_drvr_linktab[unit].updown_ind = ipr_updown;
1242 /*===========================================================================*/
1244 #endif /* NI4BIPR > 0 */