Fix warning about unused variable
[dragonfly.git] / sys / net / i4b / driver / i4b_ipr.c
CommitLineData
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1/*
2 * Copyright (c) 1997, 2001 Hellmuth Michaelis. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
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.
12 *
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
23 * SUCH DAMAGE.
24 *
25 *---------------------------------------------------------------------------
26 *
27 * i4b_ipr.c - isdn4bsd IP over raw HDLC ISDN network driver
28 * ---------------------------------------------------------
29 *
30 * $FreeBSD: src/sys/i4b/driver/i4b_ipr.c,v 1.8.2.3 2001/10/27 15:48:17 hm Exp $
9a7f3897 31 * $DragonFly: src/sys/net/i4b/driver/i4b_ipr.c,v 1.10 2004/02/13 17:45:49 joerg Exp $
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32 *
33 * last edit-date: [Fri Oct 26 19:32:38 2001]
34 *
35 *---------------------------------------------------------------------------*
36 *
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
50 *
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
57 *
58 *---------------------------------------------------------------------------*/
59
1f2de5d4 60#include "use_i4bipr.h"
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61
62#if NI4BIPR > 0
63
9a7f3897 64#if defined(__DragonFly__) || defined(__FreeBSD__)
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65#include "opt_i4b.h"
66#endif
67
68#include <sys/param.h>
69#include <sys/systm.h>
70#include <sys/mbuf.h>
71#include <sys/socket.h>
72#include <sys/errno.h>
73
9a7f3897 74#if defined(__DragonFly__) || defined(__FreeBSD__)
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75#include <sys/ioccom.h>
76#include <sys/sockio.h>
77#ifdef IPR_VJ
78#include <sys/malloc.h>
79#endif
80#else
81#include <sys/ioctl.h>
82#endif
83
84#if defined(__NetBSD__) && __NetBSD_Version__ >= 104230000
85#include <sys/callout.h>
86#endif
87
88#include <sys/kernel.h>
89
90#include <net/if.h>
91#include <net/if_types.h>
92#include <net/netisr.h>
93
94#include <netinet/in.h>
95#include <netinet/in_systm.h>
96#include <netinet/in_var.h>
97#include <netinet/ip.h>
98
99#ifdef IPR_VJ
100#include <net/slcompress.h>
101#define IPR_COMPRESS IFF_LINK0 /* compress TCP traffic */
102#define IPR_AUTOCOMP IFF_LINK1 /* auto-enable TCP compression */
103
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 !
108 *
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)
112 * functions fine.
113 *---------------------------------------------------------------------------*/
114#define IPR_VJ_USEBUFFER /* define to use an allocated separate buffer*/
115 /* undef to uncompress in the mbuf itself */
116#endif /* IPR_VJ */
117
9a7f3897 118#if defined(__DragonFly__) || (defined(__FreeBSD_version) && __FreeBSD_version >= 400008)
1f2de5d4 119#include "use_bpf.h"
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120#else
121#include "bpfilter.h"
122#endif
123
124#if NBPFILTER > 0 || NBPF > 0
125#include <sys/time.h>
126#include <net/bpf.h>
127#endif
128
9a7f3897 129#if defined(__DragonFly__) || defined(__FreeBSD__)
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130#include <net/i4b/include/machine/i4b_debug.h>
131#include <net/i4b/include/machine/i4b_ioctl.h>
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132#else
133#include <i4b/i4b_debug.h>
134#include <i4b/i4b_ioctl.h>
135#endif
136
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137#include "../include/i4b_global.h"
138#include "../include/i4b_l3l4.h"
984263bc 139
1f2de5d4 140#include "../layer4/i4b_l4.h"
984263bc 141
9a7f3897 142#if !defined(__DragonFly__) || !defined(__FreeBSD__)
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143#include <machine/cpu.h> /* For softnet */
144#endif
145
3e4a09e7 146#if defined(__FreeBSD__) && !defined(__DragonFly__)
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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 */
154#else
155#define IPR_FMT "%s: "
156#define IPR_ARG(sc) ((sc)->sc_if.if_xname)
157#define PDEVSTATIC /* not static */
158#endif
159
160#define I4BIPRMTU 1500 /* regular MTU */
161#define I4BIPRMAXMTU 2000 /* max MTU */
162#define I4BIPRMINMTU 500 /* min MTU */
163
164#define I4BIPRMAXQLEN 50 /* max queue length */
165
166#define I4BIPRACCT 1 /* enable accounting messages */
167#define I4BIPRACCTINTVL 2 /* accounting msg interval in secs */
168#define I4BIPRADJFRXP 1 /* adjust 1st rxd packet */
169
170/* initialized by L4 */
171
172static drvr_link_t ipr_drvr_linktab[NI4BIPR];
173static isdn_link_t *isdn_linktab[NI4BIPR];
174
175struct ipr_softc {
176 struct ifnet sc_if; /* network-visible interface */
177 int sc_state; /* state of the interface */
178
3e4a09e7 179#if !defined(__FreeBSD__) || defined(__DragonFly__)
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180 int sc_unit; /* unit number for Net/OpenBSD */
181#endif
182
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 */
188
189#if I4BIPRACCT
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 */
197#endif
198
199#if defined(__NetBSD__) && __NetBSD_Version__ >= 104230000
200 struct callout sc_callout;
201#endif
9a7f3897 202#if defined(__DragonFly__) || defined(__FreeBSD__)
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203 struct callout_handle sc_callout;
204#endif
205
206#ifdef I4BIPRADJFRXP
207 int sc_first_pkt; /* flag, first rxd packet */
208#endif
209#if IPR_LOG
210 int sc_log_first; /* log first n packets */
211#endif
212
213#ifdef IPR_VJ
214 struct slcompress sc_compr; /* tcp compression data */
215#ifdef IPR_VJ_USEBUFFER
216 u_char *sc_cbuf; /* tcp decompression buffer */
217#endif
218#endif
219
220} ipr_softc[NI4BIPR];
221
222enum ipr_states {
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 */
227};
228
3e4a09e7 229#if (defined(__FreeBSD__) && !defined(__DragonFly__)) || (defined(__bsdi__))
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230#define THE_UNIT sc->sc_if.if_unit
231#else
232#define THE_UNIT sc->sc_unit
233#endif
234
9a7f3897 235#if defined(__DragonFly__) || defined __FreeBSD__ || defined __NetBSD__
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236# define IOCTL_CMD_T u_long
237#else
238# define IOCTL_CMD_T int
239#endif
240
9a7f3897 241#if defined(__DragonFly__) || defined(__FreeBSD__)
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242PDEVSTATIC void i4biprattach(void *);
243PSEUDO_SET(i4biprattach, i4b_ipr);
244static int i4biprioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, caddr_t data);
245#else
158abb01 246PDEVSTATIC void i4biprattach (void);
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247static int i4biprioctl(struct ifnet *ifp, u_long cmd, caddr_t data);
248#endif
249
250#ifdef __bsdi__
251static int iprwatchdog(int unit);
252#else
253static void iprwatchdog(struct ifnet *ifp);
254#endif
255static void ipr_init_linktab(int unit);
256static void ipr_tx_queue_empty(int unit);
257static int i4biproutput(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst, struct rtentry *rtp);
258static void iprclearqueues(struct ipr_softc *sc);
259
260/*===========================================================================*
261 * DEVICE DRIVER ROUTINES
262 *===========================================================================*/
263
264/*---------------------------------------------------------------------------*
265 * interface attach routine at kernel boot time
266 *---------------------------------------------------------------------------*/
267PDEVSTATIC void
9a7f3897 268#if defined(__DragonFly__) || defined(__FreeBSD__)
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269i4biprattach(void *dummy)
270#else
271i4biprattach()
272#endif
273{
274 struct ipr_softc *sc = ipr_softc;
275 int i;
276
277#ifdef IPR_VJ
278 printf("i4bipr: %d IP over raw HDLC ISDN device(s) attached (VJ header compression)\n", NI4BIPR);
279#else
280 printf("i4bipr: %d IP over raw HDLC ISDN device(s) attached\n", NI4BIPR);
281#endif
282
283 for(i=0; i < NI4BIPR; sc++, i++)
284 {
285 ipr_init_linktab(i);
286
287 NDBGL4(L4_DIALST, "setting dial state to ST_IDLE");
288
289 sc->sc_state = ST_IDLE;
290
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291#ifdef __DragonFly__
292 if_initname(&(sc->sc_if), "ipr", i);
293#elif defined(__FreeBSD__)
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294 sc->sc_if.if_name = "ipr";
295 sc->sc_if.if_unit = i;
296#elif defined(__bsdi__)
297 sc->sc_if.if_name = "ipr";
298 sc->sc_if.if_unit = i;
299#else
300 sprintf(sc->sc_if.if_xname, "ipr%d", i);
301 sc->sc_if.if_softc = sc;
302 sc->sc_unit = i;
303#endif
304
305#ifdef IPR_VJ
306 sc->sc_if.if_flags = IFF_POINTOPOINT | IFF_SIMPLEX | IPR_AUTOCOMP;
307#else
308 sc->sc_if.if_flags = IFF_POINTOPOINT | IFF_SIMPLEX;
309#endif
310
311#if defined(__NetBSD__) && __NetBSD_Version__ >= 104230000
312 callout_init(&sc->sc_callout);
313#endif
314
315 sc->sc_if.if_mtu = I4BIPRMTU;
316 sc->sc_if.if_type = IFT_ISDNBASIC;
317 sc->sc_if.if_ioctl = i4biprioctl;
318 sc->sc_if.if_output = i4biproutput;
319
320 sc->sc_if.if_snd.ifq_maxlen = I4BIPRMAXQLEN;
321 sc->sc_fastq.ifq_maxlen = I4BIPRMAXQLEN;
322
323#if defined (__FreeBSD__) && __FreeBSD__ > 4
324 mtx_init(&sc->sc_fastq.ifq_mtx, "i4b_ipr_fastq", MTX_DEF);
325#endif
326 sc->sc_if.if_ipackets = 0;
327 sc->sc_if.if_ierrors = 0;
328 sc->sc_if.if_opackets = 0;
329 sc->sc_if.if_oerrors = 0;
330 sc->sc_if.if_collisions = 0;
331 sc->sc_if.if_ibytes = 0;
332 sc->sc_if.if_obytes = 0;
333 sc->sc_if.if_imcasts = 0;
334 sc->sc_if.if_omcasts = 0;
335 sc->sc_if.if_iqdrops = 0;
336 sc->sc_if.if_noproto = 0;
337
338#if I4BIPRACCT
339 sc->sc_if.if_timer = 0;
340 sc->sc_if.if_watchdog = iprwatchdog;
341 sc->sc_iinb = 0;
342 sc->sc_ioutb = 0;
343 sc->sc_inb = 0;
344 sc->sc_outb = 0;
345 sc->sc_linb = 0;
346 sc->sc_loutb = 0;
347 sc->sc_fn = 1;
348#endif
349#if IPR_LOG
350 sc->sc_log_first = IPR_LOG;
351#endif
352
353#ifdef IPR_VJ
9a7f3897 354#if defined(__DragonFly__) || defined(__FreeBSD__)
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355 sl_compress_init(&sc->sc_compr, -1);
356#else
357 sl_compress_init(&sc->sc_compr);
358#endif
359
360#ifdef IPR_VJ_USEBUFFER
361 if(!((sc->sc_cbuf =
362 (u_char *)malloc(I4BIPRMAXMTU+128, M_DEVBUF, M_WAITOK))))
363 {
364 panic("if_ipr.c, ipr_attach: VJ malloc failed");
365 }
366#endif
367#endif
368 sc->sc_updown = SOFT_ENA; /* soft enabled */
369 sc->sc_dialresp = DSTAT_NONE; /* no response */
370 sc->sc_lastdialresp = DSTAT_NONE;
371
372 if_attach(&sc->sc_if);
373
374#if NBPFILTER > 0 || NBPF > 0
9a7f3897 375#if defined(__DragonFly__) || defined(__FreeBSD__)
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376 bpfattach(&sc->sc_if, DLT_NULL, sizeof(u_int));
377#else
378 bpfattach(&sc->sc_if.if_bpf, &sc->sc_if, DLT_NULL, sizeof(u_int));
379#endif
380#endif
381 }
382}
383
384/*---------------------------------------------------------------------------*
385 * output a packet to the ISDN B-channel
386 *---------------------------------------------------------------------------*/
387static int
388i4biproutput(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst,
389 struct rtentry *rtp)
390{
391 struct ipr_softc *sc;
392 int unit;
393 int s;
394 struct ifqueue *ifq;
395 struct ip *ip;
396
397 s = SPLI4B();
398
3e4a09e7 399#if (defined(__FreeBSD__) && !defined(__DragonFly__)) || (defined(__bsdi__))
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400 unit = ifp->if_unit;
401 sc = &ipr_softc[unit];
402#else
403 sc = ifp->if_softc;
404 unit = sc->sc_unit;
405#endif
406
407 /* check for IP */
408
409 if(dst->sa_family != AF_INET)
410 {
411 printf(IPR_FMT "af%d not supported\n", IPR_ARG(sc), dst->sa_family);
412 m_freem(m);
413 splx(s);
414 sc->sc_if.if_noproto++;
415 sc->sc_if.if_oerrors++;
416 return(EAFNOSUPPORT);
417 }
418
419 /* check interface state = UP */
420
421 if(!(ifp->if_flags & IFF_UP))
422 {
423 NDBGL4(L4_IPRDBG, "ipr%d: interface is DOWN!", unit);
424 m_freem(m);
425 splx(s);
426 sc->sc_if.if_oerrors++;
427 return(ENETDOWN);
428 }
429
430 /* dial if necessary */
431
432 if(sc->sc_state == ST_IDLE || sc->sc_state == ST_DIALING)
433 {
434
435#ifdef NOTDEF
436 switch(sc->sc_dialresp)
437 {
438 case DSTAT_TFAIL: /* transient failure */
439 NDBGL4(L4_IPRDBG, "ipr%d: transient dial failure!", unit);
440 m_freem(m);
441 iprclearqueues(sc);
442 sc->sc_dialresp = DSTAT_NONE;
443 splx(s);
444 sc->sc_if.if_oerrors++;
445 return(ENETUNREACH);
446 break;
447
448 case DSTAT_PFAIL: /* permanent failure */
449 NDBGL4(L4_IPRDBG, "ipr%d: permanent dial failure!", unit);
450 m_freem(m);
451 iprclearqueues(sc);
452 sc->sc_dialresp = DSTAT_NONE;
453 splx(s);
454 sc->sc_if.if_oerrors++;
455 return(EHOSTUNREACH);
456 break;
457
458 case DSTAT_INONLY: /* no dialout allowed*/
459 NDBGL4(L4_IPRDBG, "ipr%d: dialout not allowed failure!", unit);
460 m_freem(m);
461 iprclearqueues(sc);
462 sc->sc_dialresp = DSTAT_NONE;
463 splx(s);
464 sc->sc_if.if_oerrors++;
465 return(EHOSTUNREACH);
466 break;
467 }
468#endif
469
470 NDBGL4(L4_IPRDBG, "ipr%d: send dial request message!", unit);
471 NDBGL4(L4_DIALST, "ipr%d: setting dial state to ST_DIALING", unit);
472 i4b_l4_dialout(BDRV_IPR, unit);
473 sc->sc_state = ST_DIALING;
474 }
475
476#if IPR_LOG
477 if(sc->sc_log_first > 0)
478 {
479 --(sc->sc_log_first);
480 i4b_l4_packet_ind(BDRV_IPR, unit, 1, m );
481 }
482#endif
483
484 /* update access time */
485
486 microtime(&sc->sc_if.if_lastchange);
487
488 /*
489 * check, if type of service indicates interactive, i.e. telnet,
490 * traffic. in case it is interactive, put it into the fast queue,
491 * else (i.e. ftp traffic) put it into the "normal" queue
492 */
493
494 ip = mtod(m, struct ip *); /* get ptr to ip header */
495
496 if(ip->ip_tos & IPTOS_LOWDELAY)
497 ifq = &sc->sc_fastq;
498 else
499 ifq = &sc->sc_if.if_snd;
500
501 /* check for space in choosen send queue */
502
9a7f3897 503#if defined(__DragonFly__) || defined (__FreeBSD__)
8bde602d 504 if (netisr_queue(NETISR_IP, m))
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505 {
506 NDBGL4(L4_IPRDBG, "ipr%d: send queue full!", unit);
507 splx(s);
508 sc->sc_if.if_oerrors++;
509 return(ENOBUFS);
510 }
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511#endif
512
513 NDBGL4(L4_IPRDBG, "ipr%d: add packet to send queue!", unit);
514
515 ipr_tx_queue_empty(unit);
516
517 splx(s);
518
519 return (0);
520}
521
522/*---------------------------------------------------------------------------*
523 * process ioctl
524 *---------------------------------------------------------------------------*/
9a7f3897 525#if defined(__DragonFly__) || defined(__FreeBSD__)
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526static int
527i4biprioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, caddr_t data)
528#else
529static int
530i4biprioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
531#endif
532{
3e4a09e7 533#if (defined(__FreeBSD__) && !defined(__DragonFly__)) || (defined(__bsdi__))
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534 struct ipr_softc *sc = &ipr_softc[ifp->if_unit];
535#else
536 struct ipr_softc *sc = ifp->if_softc;
537#endif
538
539 struct ifreq *ifr = (struct ifreq *)data;
540 struct ifaddr *ifa = (struct ifaddr *)data;
541 int s;
542 int error = 0;
543
544 s = SPLI4B();
545
546 switch (cmd)
547 {
548 case SIOCAIFADDR: /* add interface address */
549 case SIOCSIFADDR: /* set interface address */
550 case SIOCSIFDSTADDR: /* set interface destination address */
551 if(ifa->ifa_addr->sa_family != AF_INET)
552 error = EAFNOSUPPORT;
553 else
554 sc->sc_if.if_flags |= IFF_UP;
555 microtime(&sc->sc_if.if_lastchange);
556 break;
557
558 case SIOCSIFFLAGS: /* set interface flags */
559 if(!(ifr->ifr_flags & IFF_UP))
560 {
561 if(sc->sc_if.if_flags & IFF_RUNNING)
562 {
563 /* disconnect ISDN line */
3e4a09e7 564#if (defined(__FreeBSD__) && !defined(__DragonFly__)) || (defined(__bsdi__))
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565 i4b_l4_drvrdisc(BDRV_IPR, ifp->if_unit);
566#else
567 i4b_l4_drvrdisc(BDRV_IPR, sc->sc_unit);
568#endif
569 sc->sc_if.if_flags &= ~IFF_RUNNING;
570 }
571
572 sc->sc_state = ST_IDLE;
573
574 /* empty queues */
575
576 iprclearqueues(sc);
577 }
578
579 if(ifr->ifr_flags & IFF_DEBUG)
580 {
581 /* enable debug messages */
582 }
583
584 microtime(&sc->sc_if.if_lastchange);
585 break;
586
587#if !defined(__OpenBSD__)
588 case SIOCSIFMTU: /* set interface MTU */
589 if(ifr->ifr_mtu > I4BIPRMAXMTU)
590 error = EINVAL;
591 else if(ifr->ifr_mtu < I4BIPRMINMTU)
592 error = EINVAL;
593 else
594 {
595 ifp->if_mtu = ifr->ifr_mtu;
596 microtime(&sc->sc_if.if_lastchange);
597 }
598 break;
599#endif /* __OPENBSD__ */
600
601#if 0
602 /* not needed for FreeBSD, done in sl_compress_init() (-hm) */
603
604 /* need to add an ioctl: set VJ max slot ID
605 * #define IPRIOCSMAXCID _IOW('I', XXX, int)
606 */
607#ifdef IPR_VJ
608 case IPRIOCSMAXCID:
609 {
dadab5e9 610 struct thread *td = curthread; /* XXX */
984263bc 611
dadab5e9 612 if ((error = suser(td)) != 0)
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613 return (error);
614 sl_compress_setup(sc->sc_compr, *(int *)data);
615 }
616 break;
617#endif
618#endif
619 default:
620 error = EINVAL;
621 break;
622 }
623
624 splx(s);
625
626 return(error);
627}
628
629/*---------------------------------------------------------------------------*
630 * clear the interface's send queues
631 *---------------------------------------------------------------------------*/
632static void
633iprclearqueues(struct ipr_softc *sc)
634{
635 int x;
636
637#if defined (__FreeBSD__) && __FreeBSD__ > 4
638 x = splimp();
639 IF_DRAIN(&sc->sc_fastq);
640 IF_DRAIN(&sc->sc_if.if_snd);
641 splx(x);
642#else
643 struct mbuf *m;
644
645 for(;;)
646 {
647 x = splimp();
648 IF_DEQUEUE(&sc->sc_fastq, m);
649 splx(x);
650 if(m)
651 m_freem(m);
652 else
653 break;
654 }
655
656 for(;;)
657 {
658 x = splimp();
659 IF_DEQUEUE(&sc->sc_if.if_snd, m);
660 splx(x);
661 if(m)
662 m_freem(m);
663 else
664 break;
665 }
666#endif
667}
668
669#if I4BIPRACCT
670/*---------------------------------------------------------------------------*
671 * watchdog routine
672 *---------------------------------------------------------------------------*/
673#ifdef __bsdi__
674static int
675iprwatchdog(int unit)
676{
677#else
678static void
679iprwatchdog(struct ifnet *ifp)
680{
681#endif
3e4a09e7 682#if defined(__FreeBSD__) && !defined(__DragonFly__)
984263bc
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683 int unit = ifp->if_unit;
684 struct ipr_softc *sc = &ipr_softc[unit];
685#elif defined(__bsdi__)
686 struct ipr_softc *sc = &ipr_softc[unit];
687 struct ifnet *ifp = &ipr_softc[unit].sc_if;
688#else
689 struct ipr_softc *sc = ifp->if_softc;
690 int unit = sc->sc_unit;
691#endif
692 bchan_statistics_t bs;
693
694 /* get # of bytes in and out from the HSCX driver */
695
696 (*isdn_linktab[unit]->bch_stat)
697 (isdn_linktab[unit]->unit, isdn_linktab[unit]->channel, &bs);
698
699 sc->sc_ioutb += bs.outbytes;
700 sc->sc_iinb += bs.inbytes;
701
702 if((sc->sc_iinb != sc->sc_linb) || (sc->sc_ioutb != sc->sc_loutb) || sc->sc_fn)
703 {
704 int ri = (sc->sc_iinb - sc->sc_linb)/I4BIPRACCTINTVL;
705 int ro = (sc->sc_ioutb - sc->sc_loutb)/I4BIPRACCTINTVL;
706
707 if((sc->sc_iinb == sc->sc_linb) && (sc->sc_ioutb == sc->sc_loutb))
708 sc->sc_fn = 0;
709 else
710 sc->sc_fn = 1;
711
712 sc->sc_linb = sc->sc_iinb;
713 sc->sc_loutb = sc->sc_ioutb;
714
715 i4b_l4_accounting(BDRV_IPR, unit, ACCT_DURING,
716 sc->sc_ioutb, sc->sc_iinb, ro, ri, sc->sc_outb, sc->sc_inb);
717 }
718 sc->sc_if.if_timer = I4BIPRACCTINTVL;
719#ifdef __bsdi__
720 return 0;
721#endif
722}
723#endif /* I4BIPRACCT */
724
725/*===========================================================================*
726 * ISDN INTERFACE ROUTINES
727 *===========================================================================*/
728
729/*---------------------------------------------------------------------------*
730 * start transmitting after connect
731 *---------------------------------------------------------------------------*/
732static void
733i4bipr_connect_startio(struct ipr_softc *sc)
734{
735 int s = SPLI4B();
736
737 if(sc->sc_state == ST_CONNECTED_W)
738 {
739 sc->sc_state = ST_CONNECTED_A;
740 ipr_tx_queue_empty(THE_UNIT);
741 }
742
743 splx(s);
744}
745
746/*---------------------------------------------------------------------------*
747 * this routine is called from L4 handler at connect time
748 *---------------------------------------------------------------------------*/
749static void
750ipr_connect(int unit, void *cdp)
751{
752 struct ipr_softc *sc = &ipr_softc[unit];
753 int s;
754
755 sc->sc_cdp = (call_desc_t *)cdp;
756
757 s = SPLI4B();
758
759 NDBGL4(L4_DIALST, "ipr%d: setting dial state to ST_CONNECTED", unit);
760
761 sc->sc_if.if_flags |= IFF_RUNNING;
762 sc->sc_state = ST_CONNECTED_W;
763
764 sc->sc_dialresp = DSTAT_NONE;
765 sc->sc_lastdialresp = DSTAT_NONE;
766
767#if I4BIPRACCT
768 sc->sc_iinb = 0;
769 sc->sc_ioutb = 0;
770 sc->sc_inb = 0;
771 sc->sc_outb = 0;
772 sc->sc_linb = 0;
773 sc->sc_loutb = 0;
774 sc->sc_if.if_timer = I4BIPRACCTINTVL;
775#endif
776
777#ifdef I4BIPRADJFRXP
778 sc->sc_first_pkt = 1;
779#endif
780
781 /*
782 * Sometimes ISDN B-channels are switched thru asymmetic. This
783 * means that under such circumstances B-channel data (the first
784 * three packets of a TCP connection in my case) may get lost,
785 * causing a large delay until the connection is started.
786 * When the sending of the very first packet of a TCP connection
787 * is delayed for a to be empirically determined delay (close
788 * to a second in my case) those packets go thru and the TCP
789 * connection comes up "almost" immediately (-hm).
790 */
791
792 if(sc->sc_cdp->isdntxdelay > 0)
793 {
794 int delay;
795
796 if (hz == 100) {
797 delay = sc->sc_cdp->isdntxdelay; /* avoid any rounding */
798 } else {
799 delay = sc->sc_cdp->isdntxdelay*hz;
800 delay /= 100;
801 }
802
803 START_TIMER(sc->sc_callout, (TIMEOUT_FUNC_T)i4bipr_connect_startio, (void *)sc, delay);
804 }
805 else
806 {
807 sc->sc_state = ST_CONNECTED_A;
808 ipr_tx_queue_empty(unit);
809 }
810
811 splx(s);
812
813 /* we don't need any negotiation - pass event back right now */
814 i4b_l4_negcomplete(sc->sc_cdp);
815}
816
817/*---------------------------------------------------------------------------*
818 * this routine is called from L4 handler at disconnect time
819 *---------------------------------------------------------------------------*/
820static void
821ipr_disconnect(int unit, void *cdp)
822{
823 call_desc_t *cd = (call_desc_t *)cdp;
824 struct ipr_softc *sc = &ipr_softc[unit];
825
826 /* new stuff to check that the active channel is being closed */
827
828 if (cd != sc->sc_cdp)
829 {
830 NDBGL4(L4_IPRDBG, "ipr%d: channel %d not active",
831 cd->driver_unit, cd->channelid);
832 return;
833 }
834
835#if I4BIPRACCT
836 sc->sc_if.if_timer = 0;
837#endif
838#if IPR_LOG
839 /* show next IPR_LOG packets again */
840 sc->sc_log_first = IPR_LOG;
841#endif
842
843 i4b_l4_accounting(BDRV_IPR, cd->driver_unit, ACCT_FINAL,
844 sc->sc_ioutb, sc->sc_iinb, 0, 0, sc->sc_outb, sc->sc_inb);
845
846 sc->sc_cdp = (call_desc_t *)0;
847
848 NDBGL4(L4_DIALST, "setting dial state to ST_IDLE");
849
850 sc->sc_dialresp = DSTAT_NONE;
851 sc->sc_lastdialresp = DSTAT_NONE;
852
853 sc->sc_if.if_flags &= ~IFF_RUNNING;
854 sc->sc_state = ST_IDLE;
855}
856
857/*---------------------------------------------------------------------------*
858 * this routine is used to give a feedback from userland daemon
859 * in case of dial problems
860 *---------------------------------------------------------------------------*/
861static void
862ipr_dialresponse(int unit, int status, cause_t cause)
863{
864 struct ipr_softc *sc = &ipr_softc[unit];
865 sc->sc_dialresp = status;
866
867 NDBGL4(L4_IPRDBG, "ipr%d: last=%d, this=%d",
868 unit, sc->sc_lastdialresp, sc->sc_dialresp);
869
870 if(status != DSTAT_NONE)
871 {
872 NDBGL4(L4_IPRDBG, "ipr%d: clearing queues", unit);
873 iprclearqueues(sc);
874 }
875}
876
877/*---------------------------------------------------------------------------*
878 * interface soft up/down
879 *---------------------------------------------------------------------------*/
880static void
881ipr_updown(int unit, int updown)
882{
883 struct ipr_softc *sc = &ipr_softc[unit];
884 sc->sc_updown = updown;
885}
886
887/*---------------------------------------------------------------------------*
888 * this routine is called from the HSCX interrupt handler
889 * when a new frame (mbuf) has been received and was put on
890 * the rx queue. It is assumed that this routines runs at
891 * pri level splimp() ! Keep it short !
892 *---------------------------------------------------------------------------*/
893static void
894ipr_rx_data_rdy(int unit)
895{
94332c29
RG
896 struct ipr_softc *sc = &ipr_softc[unit];
897 struct mbuf *m;
984263bc
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898#ifdef IPR_VJ
899#ifdef IPR_VJ_USEBUFFER
900 u_char *cp = sc->sc_cbuf;
901#endif
902 int len, c;
903#endif
904
905 if((m = *isdn_linktab[unit]->rx_mbuf) == NULL)
906 return;
907
908 m->m_pkthdr.rcvif = &sc->sc_if;
909
910 m->m_pkthdr.len = m->m_len;
911
912 microtime(&sc->sc_if.if_lastchange);
913
914#ifdef I4BIPRADJFRXP
915
916 /*
917 * The very first packet after the B channel is switched thru
918 * has very often several bytes of random data prepended. This
919 * routine looks where the IP header starts and removes the
920 * the bad data.
921 */
922
923 if(sc->sc_first_pkt)
924 {
925 unsigned char *mp = m->m_data;
926 int i;
927
928 sc->sc_first_pkt = 0;
929
930 for(i = 0; i < m->m_len; i++, mp++)
931 {
932 if( ((*mp & 0xf0) == 0x40) &&
933 ((*mp & 0x0f) >= 0x05) )
934 {
935 m->m_data = mp;
936 m->m_pkthdr.len -= i;
937 break;
938 }
939 }
940 }
941#endif
942
943 sc->sc_if.if_ipackets++;
944 sc->sc_if.if_ibytes += m->m_pkthdr.len;
945
946#ifdef IPR_VJ
947 if((c = (*(mtod(m, u_char *)) & 0xf0)) != (IPVERSION << 4))
948 {
949 /* copy data to buffer */
950
951 len = m->m_len;
952
953#ifdef IPR_VJ_USEBUFFER
954/* XXX */ m_copydata(m, 0, len, cp);
955#endif
956
957 if(c & 0x80)
958 {
959 c = TYPE_COMPRESSED_TCP;
960 }
961 else if(c == TYPE_UNCOMPRESSED_TCP)
962 {
963#ifdef IPR_VJ_USEBUFFER
964 *cp &= 0x4f; /* XXX */
965#else
966 *(mtod(m, u_char *)) &= 0x4f;
967#endif
968 }
969
970 /*
971 * We've got something that's not an IP packet.
972 * If compression is enabled, try to decompress it.
973 * Otherwise, if `auto-enable' compression is on and
974 * it's a reasonable packet, decompress it and then
975 * enable compression. Otherwise, drop it.
976 */
977 if(sc->sc_if.if_flags & IPR_COMPRESS)
978 {
979#ifdef IPR_VJ_USEBUFFER
980 len = sl_uncompress_tcp(&cp,len,(u_int)c,&sc->sc_compr);
981#else
982 len = sl_uncompress_tcp((u_char **)&m->m_data, len,
983 (u_int)c, &sc->sc_compr);
984#endif
985
986 if(len <= 0)
987 {
988#ifdef DEBUG_IPR_VJ
989 printf("i4b_ipr, ipr_rx_data_rdy: len <= 0 IPR_COMPRESS!\n");
990#endif
991 goto error;
992 }
993 }
994 else if((sc->sc_if.if_flags & IPR_AUTOCOMP) &&
995 (c == TYPE_UNCOMPRESSED_TCP) && (len >= 40))
996 {
997#ifdef IPR_VJ_USEBUFFER
998 len = sl_uncompress_tcp(&cp,len,(u_int)c,&sc->sc_compr);
999#else
1000 len = sl_uncompress_tcp((u_char **)&m->m_data, len,
1001 (u_int)c, &sc->sc_compr);
1002#endif
1003
1004 if(len <= 0)
1005 {
1006#ifdef DEBUG_IPR_VJ
1007 printf("i4b_ipr, ipr_rx_data_rdy: len <= 0 IPR_AUTOCOMP!\n");
1008#endif
1009 goto error;
1010 }
1011
1012 sc->sc_if.if_flags |= IPR_COMPRESS;
1013 }
1014 else
1015 {
1016#ifdef DEBUG_IPR_VJ
1017 printf("i4b_ipr, ipr_input: invalid ip packet!\n");
1018#endif
1019
1020error:
1021 sc->sc_if.if_ierrors++;
1022 sc->sc_if.if_collisions++;
1023 m_freem(m);
1024 return;
1025 }
1026#ifdef IPR_VJ_USEBUFFER
1027/* XXX */ m_copyback(m, 0, len, cp);
1028#else
1029 m->m_len = m->m_pkthdr.len = len;
1030#endif
1031 }
1032#endif
1033
1034#if I4BIPRACCT
1035 /* NB. do the accounting after decompression! */
1036 sc->sc_inb += m->m_pkthdr.len;
1037#endif
1038#if IPR_LOG
1039 if(sc->sc_log_first > 0)
1040 {
1041 --(sc->sc_log_first);
1042 i4b_l4_packet_ind(BDRV_IPR, unit, 0, m );
1043 }
1044#endif
1045
1046#if NBPFILTER > 0 || NBPF > 0
1047 if(sc->sc_if.if_bpf)
1048 {
1049 /* prepend the address family as a four byte field */
1050 struct mbuf mm;
1051 u_int af = AF_INET;
1052 mm.m_next = m;
1053 mm.m_len = 4;
1054 mm.m_data = (char *)&af;
1055
9a7f3897 1056#if defined(__DragonFly__) || defined(__FreeBSD__)
984263bc
MD
1057 bpf_mtap(&sc->sc_if, &mm);
1058#else
1059 bpf_mtap(sc->sc_if.if_bpf, &mm);
1060#endif
1061 }
1062#endif /* NBPFILTER > 0 || NBPF > 0 */
1063
9a7f3897 1064#if defined(__DragonFly__) || defined (__FreeBSD__)
8bde602d 1065 if (netisr_queue(NETISR_IP, m)) {
984263bc
MD
1066 NDBGL4(L4_IPRDBG, "ipr%d: ipintrq full!", unit);
1067 sc->sc_if.if_ierrors++;
1068 sc->sc_if.if_iqdrops++;
1069 }
8bde602d 1070#endif
984263bc
MD
1071}
1072
1073/*---------------------------------------------------------------------------*
1074 * this routine is called from the HSCX interrupt handler
1075 * when the last frame has been sent out and there is no
1076 * further frame (mbuf) in the tx queue.
1077 *---------------------------------------------------------------------------*/
1078static void
1079ipr_tx_queue_empty(int unit)
1080{
94332c29
RG
1081 struct ipr_softc *sc = &ipr_softc[unit];
1082 struct mbuf *m;
984263bc
MD
1083#ifdef IPR_VJ
1084 struct ip *ip;
1085#endif
1086 int x = 0;
1087
1088 if(sc->sc_state != ST_CONNECTED_A)
1089 return;
1090
1091 for(;;)
1092 {
1093 IF_DEQUEUE(&sc->sc_fastq, m);
1094 if(m)
1095 {
1096 sc->sc_if.if_omcasts++;
1097 }
1098 else
1099 {
1100 IF_DEQUEUE(&sc->sc_if.if_snd, m);
1101 if(m == NULL)
1102 break;
1103 }
1104
1105 microtime(&sc->sc_if.if_lastchange);
1106
1107#if NBPFILTER > 0 || NBPF > 0
1108 if(sc->sc_if.if_bpf)
1109 {
1110 /* prepend the address family as a four byte field */
1111
1112 struct mbuf mm;
1113 u_int af = AF_INET;
1114 mm.m_next = m;
1115 mm.m_len = 4;
1116 mm.m_data = (char *)&af;
1117
9a7f3897 1118#if defined(__DragonFly__) || defined(__FreeBSD__)
984263bc
MD
1119 bpf_mtap(&sc->sc_if, &mm);
1120#else
1121 bpf_mtap(sc->sc_if.if_bpf, &mm);
1122#endif
1123 }
1124#endif /* NBPFILTER */
1125
1126#if I4BIPRACCT
1127 sc->sc_outb += m->m_pkthdr.len; /* size before compression */
1128#endif
1129
1130#ifdef IPR_VJ
1131 if((ip = mtod(m, struct ip *))->ip_p == IPPROTO_TCP)
1132 {
1133 if(sc->sc_if.if_flags & IPR_COMPRESS)
1134 {
1135 *mtod(m, u_char *) |= sl_compress_tcp(m, ip,
1136 &sc->sc_compr, 1);
1137 }
1138 }
1139#endif
1140 x = 1;
1141
1142 IF_LOCK(isdn_linktab[unit]->tx_queue);
1143 if(_IF_QFULL(isdn_linktab[unit]->tx_queue))
1144 {
1145 NDBGL4(L4_IPRDBG, "ipr%d: tx queue full!", unit);
1146 m_freem(m);
1147 }
1148 else
1149 {
1150 sc->sc_if.if_obytes += m->m_pkthdr.len;
1151
1152 sc->sc_if.if_opackets++;
1153
1154 _IF_ENQUEUE(isdn_linktab[unit]->tx_queue, m);
1155
1156 }
1157 IF_UNLOCK(isdn_linktab[unit]->tx_queue);
1158 }
1159
1160 if(x)
1161 (*isdn_linktab[unit]->bch_tx_start)(isdn_linktab[unit]->unit, isdn_linktab[unit]->channel);
1162}
1163
1164/*---------------------------------------------------------------------------*
1165 * this routine is called from the HSCX interrupt handler
1166 * each time a packet is received or transmitted. It should
1167 * be used to implement an activity timeout mechanism.
1168 *---------------------------------------------------------------------------*/
1169static void
1170ipr_activity(int unit, int rxtx)
1171{
1172 ipr_softc[unit].sc_cdp->last_active_time = SECOND;
1173}
1174
1175/*---------------------------------------------------------------------------*
1176 * return this drivers linktab address
1177 *---------------------------------------------------------------------------*/
1178drvr_link_t *
1179ipr_ret_linktab(int unit)
1180{
1181 return(&ipr_drvr_linktab[unit]);
1182}
1183
1184/*---------------------------------------------------------------------------*
1185 * setup the isdn_linktab for this driver
1186 *---------------------------------------------------------------------------*/
1187void
1188ipr_set_linktab(int unit, isdn_link_t *ilt)
1189{
1190 isdn_linktab[unit] = ilt;
1191}
1192
1193/*---------------------------------------------------------------------------*
1194 * initialize this drivers linktab
1195 *---------------------------------------------------------------------------*/
1196static void
1197ipr_init_linktab(int unit)
1198{
1199 ipr_drvr_linktab[unit].unit = unit;
1200 ipr_drvr_linktab[unit].bch_rx_data_ready = ipr_rx_data_rdy;
1201 ipr_drvr_linktab[unit].bch_tx_queue_empty = ipr_tx_queue_empty;
1202 ipr_drvr_linktab[unit].bch_activity = ipr_activity;
1203 ipr_drvr_linktab[unit].line_connected = ipr_connect;
1204 ipr_drvr_linktab[unit].line_disconnected = ipr_disconnect;
1205 ipr_drvr_linktab[unit].dial_response = ipr_dialresponse;
1206 ipr_drvr_linktab[unit].updown_ind = ipr_updown;
1207}
1208
1209/*===========================================================================*/
1210
1211#endif /* NI4BIPR > 0 */