2 * ppp.c - STREAMS multiplexing pseudo-device driver for PPP.
4 * Copyright (c) 1994 Paul Mackerras. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
18 * 3. The name(s) of the authors of this software must not be used to
19 * endorse or promote products derived from this software without
20 * prior written permission.
22 * 4. Redistributions of any form whatsoever must retain the following
24 * "This product includes software developed by Paul Mackerras
25 * <paulus@samba.org>".
27 * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
28 * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
29 * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
30 * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
31 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
32 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
33 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
35 * $Id: ppp.c,v 1.26 2002/12/06 09:49:15 paulus Exp $
39 * This file is used under Solaris 2, SVR4, SunOS 4, and Digital UNIX.
42 #include <sys/types.h>
43 #include <sys/param.h>
45 #include <sys/stream.h>
46 #include <sys/stropts.h>
47 #include <sys/errno.h>
49 #include <sys/ioctl.h>
50 #include <sys/cmn_err.h>
51 #define queclass(mp) ((mp)->b_band & QPCTL)
53 #include <sys/ioccom.h>
57 #include <sys/cmn_err.h>
62 #include <sys/ksynch.h>
63 #include <sys/kstat.h>
64 #include <sys/sunddi.h>
65 #include <sys/ethernet.h>
67 #include <sys/socket.h>
68 #include <sys/sockio.h>
70 #include <netinet/in.h>
75 #include <net/ppp_defs.h>
76 #include <net/pppio.h>
80 * Modifications marked with #ifdef PRIOQ are for priority queueing of
81 * interactive traffic, and are due to Marko Zec <zec@japa.tel.fer.hr>.
86 #include <netinet/in.h> /* leave this outside of PRIOQ for htons */
95 * The IP module may use this SAP value for IP packets.
98 #define ETHERTYPE_IP 0x800
101 #if !defined(ETHERTYPE_IPV6)
102 #define ETHERTYPE_IPV6 0x86dd
103 #endif /* !defined(ETHERTYPE_IPV6) */
105 #if !defined(ETHERTYPE_ALLSAP) && defined(SOL2)
106 #define ETHERTYPE_ALLSAP 0
107 #endif /* !defined(ETHERTYPE_ALLSAP) && defined(SOL2) */
109 #if !defined(PPP_ALLSAP) && defined(SOL2)
110 #define PPP_ALLSAP PPP_ALLSTATIONS
111 #endif /* !defined(PPP_ALLSAP) && defined(SOL2) */
117 * We use this reader-writer lock to ensure that the lower streams
118 * stay connected to the upper streams while the lower-side put and
119 * service procedures are running. Essentially it is an existence
120 * lock for the upper stream associated with each lower stream.
122 krwlock_t ppp_lower_lock;
123 #define LOCK_LOWER_W rw_enter(&ppp_lower_lock, RW_WRITER)
124 #define LOCK_LOWER_R rw_enter(&ppp_lower_lock, RW_READER)
125 #define TRYLOCK_LOWER_R rw_tryenter(&ppp_lower_lock, RW_READER)
126 #define UNLOCK_LOWER rw_exit(&ppp_lower_lock)
128 #define MT_ENTER(x) mutex_enter(x)
129 #define MT_EXIT(x) mutex_exit(x)
132 * Notes on multithreaded implementation for Solaris 2:
134 * We use an inner perimeter around each queue pair and an outer
135 * perimeter around the whole driver. The inner perimeter is
136 * entered exclusively for all entry points (open, close, put,
137 * service). The outer perimeter is entered exclusively for open
138 * and close and shared for put and service. This is all done for
139 * us by the streams framework.
141 * I used to think that the perimeters were entered for the lower
142 * streams' put and service routines as well as for the upper streams'.
143 * Because of problems experienced by people, and after reading the
144 * documentation more closely, I now don't think that is true. So we
145 * now use ppp_lower_lock to give us an existence guarantee on the
146 * upper stream controlling each lower stream.
148 * Shared entry to the outer perimeter protects the existence of all
149 * the upper streams and their upperstr_t structures, and guarantees
150 * that the following fields of any upperstr_t won't change:
151 * nextmn, next, nextppa. It guarantees that the lowerq field of an
152 * upperstr_t won't go from non-zero to zero, that the global `ppas'
153 * won't change and that the no lower stream will get unlinked.
155 * Shared (reader) access to ppa_lower_lock guarantees that no lower
156 * stream will be unlinked and that the lowerq field of all upperstr_t
157 * structures won't change.
161 #define LOCK_LOWER_W 0
162 #define LOCK_LOWER_R 0
163 #define TRYLOCK_LOWER_R 1
164 #define UNLOCK_LOWER 0
165 #define MT_ENTER(x) 0
171 * Private information; one per upper stream.
173 typedef struct upperstr {
174 minor_t mn; /* minor device number */
175 struct upperstr *nextmn; /* next minor device */
176 queue_t *q; /* read q associated with this upper stream */
177 int flags; /* flag bits, see below */
178 int state; /* current DLPI state */
179 int sap; /* service access point */
180 int req_sap; /* which SAP the DLPI client requested */
181 struct upperstr *ppa; /* control stream for our ppa */
182 struct upperstr *next; /* next stream for this ppa */
183 uint ioc_id; /* last ioctl ID for this stream */
184 enum NPmode npmode; /* what to do with packets on this SAP */
185 unsigned char rblocked; /* flow control has blocked upper read strm */
186 /* N.B. rblocked is only changed by control stream's put/srv procs */
188 * There is exactly one control stream for each PPA.
189 * The following fields are only used for control streams.
192 queue_t *lowerq; /* write queue attached below this PPA */
193 struct upperstr *nextppa; /* next control stream */
196 struct pppstat stats; /* statistics */
197 time_t last_sent; /* time last NP packet sent */
198 time_t last_recv; /* time last NP packet rcvd */
200 kmutex_t stats_lock; /* lock for stats updates */
201 kstat_t *kstats; /* stats for netstat */
205 char ifname[IFNAMSIZ];
206 struct ifstats ifstats;
210 /* Values for flags */
211 #define US_PRIV 1 /* stream was opened by superuser */
212 #define US_CONTROL 2 /* stream is a control stream */
213 #define US_BLOCKED 4 /* flow ctrl has blocked lower write stream */
214 #define US_LASTMOD 8 /* no PPP modules below us */
215 #define US_DBGLOG 0x10 /* log various occurrences */
216 #define US_RBLOCKED 0x20 /* flow ctrl has blocked upper read stream */
219 #if DL_CURRENT_VERSION >= 2
220 #define US_PROMISC 0x40 /* stream is promiscuous */
221 #endif /* DL_CURRENT_VERSION >= 2 */
222 #define US_RAWDATA 0x80 /* raw M_DATA, no DLPI header */
223 #endif /* defined(SOL2) */
226 static u_char max_band=0;
227 static u_char def_band=0;
229 #define IPPORT_DEFAULT 65535
232 * Port priority table
233 * Highest priority ports are listed first, lowest are listed last.
234 * ICMP & packets using unlisted ports will be treated as "default".
235 * If IPPORT_DEFAULT is not listed here, "default" packets will be
236 * assigned lowest priority.
237 * Each line should be terminated with "0".
238 * Line containing only "0" marks the end of the list.
241 static u_short prioq_table[]= {
243 22, 23, 513, 517, 518, 0,
247 20, 70, 80, 8001, 8008, 8080, 0, /* 8001,8008,8080 - common proxy ports */
253 static upperstr_t *minor_devs = NULL;
254 static upperstr_t *ppas = NULL;
257 static int pppopen __P((queue_t *, dev_t *, int, int, cred_t *));
258 static int pppclose __P((queue_t *, int, cred_t *));
260 static int pppopen __P((queue_t *, int, int, int));
261 static int pppclose __P((queue_t *, int));
263 static int pppurput __P((queue_t *, mblk_t *));
264 static int pppuwput __P((queue_t *, mblk_t *));
265 static int pppursrv __P((queue_t *));
266 static int pppuwsrv __P((queue_t *));
267 static int ppplrput __P((queue_t *, mblk_t *));
268 static int ppplwput __P((queue_t *, mblk_t *));
269 static int ppplrsrv __P((queue_t *));
270 static int ppplwsrv __P((queue_t *));
272 static void dlpi_request __P((queue_t *, mblk_t *, upperstr_t *));
273 static void dlpi_error __P((queue_t *, upperstr_t *, int, int, int));
274 static void dlpi_ok __P((queue_t *, int));
276 static int send_data __P((mblk_t *, upperstr_t *));
277 static void new_ppa __P((queue_t *, mblk_t *));
278 static void attach_ppa __P((queue_t *, mblk_t *));
279 static void detach_ppa __P((queue_t *, mblk_t *));
280 static void detach_lower __P((queue_t *, mblk_t *));
281 static void debug_dump __P((queue_t *, mblk_t *));
282 static upperstr_t *find_dest __P((upperstr_t *, int));
284 static upperstr_t *find_promisc __P((upperstr_t *, int));
285 static mblk_t *prepend_ether __P((upperstr_t *, mblk_t *, int));
286 static mblk_t *prepend_udind __P((upperstr_t *, mblk_t *, int));
287 static void promisc_sendup __P((upperstr_t *, mblk_t *, int, int));
288 #endif /* defined(SOL2) */
289 static int putctl2 __P((queue_t *, int, int, int));
290 static int putctl4 __P((queue_t *, int, int, int));
291 static int pass_packet __P((upperstr_t *ppa, mblk_t *mp, int outbound));
292 #ifdef FILTER_PACKETS
293 static int ip_hard_filter __P((upperstr_t *ppa, mblk_t *mp, int outbound));
294 #endif /* FILTER_PACKETS */
296 #define PPP_ID 0xb1a6
297 static struct module_info ppp_info = {
299 PPP_ID, "ppp", 0, 512, 512, 384
301 PPP_ID, "ppp", 0, 512, 512, 128
305 static struct qinit pppurint = {
306 pppurput, pppursrv, pppopen, pppclose, NULL, &ppp_info, NULL
309 static struct qinit pppuwint = {
310 pppuwput, pppuwsrv, NULL, NULL, NULL, &ppp_info, NULL
313 static struct qinit ppplrint = {
314 ppplrput, ppplrsrv, NULL, NULL, NULL, &ppp_info, NULL
317 static struct qinit ppplwint = {
318 ppplwput, ppplwsrv, NULL, NULL, NULL, &ppp_info, NULL
322 extern struct ifstats *ifstats;
326 struct streamtab pppinfo = {
327 &pppurint, &pppuwint,
334 * How we maintain statistics.
337 #define INCR_IPACKETS(ppa) \
338 if (ppa->kstats != 0) { \
339 KSTAT_NAMED_PTR(ppa->kstats)[0].value.ul++; \
341 #define INCR_IERRORS(ppa) \
342 if (ppa->kstats != 0) { \
343 KSTAT_NAMED_PTR(ppa->kstats)[1].value.ul++; \
345 #define INCR_OPACKETS(ppa) \
346 if (ppa->kstats != 0) { \
347 KSTAT_NAMED_PTR(ppa->kstats)[2].value.ul++; \
349 #define INCR_OERRORS(ppa) \
350 if (ppa->kstats != 0) { \
351 KSTAT_NAMED_PTR(ppa->kstats)[3].value.ul++; \
356 #define INCR_IPACKETS(ppa) ppa->ifstats.ifs_ipackets++;
357 #define INCR_IERRORS(ppa) ppa->ifstats.ifs_ierrors++;
358 #define INCR_OPACKETS(ppa) ppa->ifstats.ifs_opackets++;
359 #define INCR_OERRORS(ppa) ppa->ifstats.ifs_oerrors++;
363 * STREAMS driver entry points.
367 pppopen(q, devp, oflag, sflag, credp)
373 pppopen(q, dev, oflag, sflag)
375 int dev; /* really dev_t */
388 DRV_OPEN_OK(dev); /* device is already open */
391 /* Calculate max_bband & def_band from definitions in prioq.h
392 This colud be done at some more approtiate time (less often)
393 but this way it works well so I'll just leave it here */
401 if (*ptr++ == IPPORT_DEFAULT) {
405 max_band += new_band;
409 def_band = max_band - def_band;
413 if (sflag == CLONEOPEN) {
415 for (prevp = &minor_devs; (up = *prevp) != 0; prevp = &up->nextmn) {
422 mn = getminor(*devp);
426 for (prevp = &minor_devs; (up = *prevp) != 0; prevp = &up->nextmn) {
431 /* this can't happen */
432 q->q_ptr = WR(q)->q_ptr = (caddr_t) up;
438 * Construct a new minor node.
440 up = (upperstr_t *) ALLOC_SLEEP(sizeof(upperstr_t));
441 bzero((caddr_t) up, sizeof(upperstr_t));
443 DPRINT("pppopen: out of kernel memory\n");
450 *devp = makedevice(getmajor(*devp), mn);
454 up->flags |= US_PRIV;
456 up->state = DL_UNATTACHED;
459 up->ifflags = IFF_UP | IFF_POINTOPOINT;
462 up->last_sent = up->last_recv = time;
463 up->npmode = NPMODE_DROP;
464 q->q_ptr = (caddr_t) up;
465 WR(q)->q_ptr = (caddr_t) up;
468 mutex_init(&up->stats_lock, NULL, MUTEX_DRIVER, NULL);
473 DRV_OPEN_OK(makedev(major(dev), mn));
478 pppclose(q, flag, credp)
488 upperstr_t *up, **upp;
489 upperstr_t *as, *asnext;
494 up = (upperstr_t *) q->q_ptr;
496 DPRINT("pppclose: q_ptr = 0\n");
499 if (up->flags & US_DBGLOG)
500 DPRINT2("ppp/%d: close, flags=%x\n", up->mn, up->flags);
501 if (up->flags & US_CONTROL) {
503 struct ifstats *ifp, *pifp;
505 if (up->lowerq != 0) {
506 /* Gack! the lower stream should have be unlinked earlier! */
507 DPRINT1("ppp%d: lower stream still connected on close?\n",
510 up->lowerq->q_ptr = 0;
511 RD(up->lowerq)->q_ptr = 0;
517 * This stream represents a PPA:
518 * For all streams attached to the PPA, clear their
519 * references to this PPA.
520 * Then remove this PPA from the list of PPAs.
522 for (as = up->next; as != 0; as = asnext) {
526 if (as->flags & US_BLOCKED) {
527 as->flags &= ~US_BLOCKED;
528 flushq(WR(as->q), FLUSHDATA);
531 for (upp = &ppas; *upp != 0; upp = &(*upp)->nextppa)
537 /* Remove the statistics from the active list. */
538 for (ifp = ifstats, pifp = 0; ifp; ifp = ifp->ifs_next) {
539 if (ifp == &up->ifstats) {
541 pifp->ifs_next = ifp->ifs_next;
543 ifstats = ifp->ifs_next;
551 * If this stream is attached to a PPA,
552 * remove it from the PPA's list.
554 if ((as = up->ppa) != 0) {
555 for (; as->next != 0; as = as->next)
556 if (as->next == up) {
565 kstat_delete(up->kstats);
566 mutex_destroy(&up->stats_lock);
572 for (prevp = &minor_devs; *prevp != 0; prevp = &(*prevp)->nextmn) {
578 FREE(up, sizeof(upperstr_t));
585 * A message from on high. We do one of three things:
587 * - put the message on the lower write stream
588 * - queue it for our service routine
595 upperstr_t *us, *ppa, *nps;
605 struct ppp_idle *pip;
613 us = (upperstr_t *) q->q_ptr;
615 DPRINT("pppuwput: q_ptr = 0!\n");
619 DPRINT1("pppuwput/%d: mp = 0!\n", us->mn);
622 if (mp->b_datap == 0) {
623 DPRINT1("pppuwput/%d: mp->b_datap = 0!\n", us->mn);
626 switch (mp->b_datap->db_type) {
630 dlpi_request(q, mp, us);
635 if (us->flags & US_DBGLOG)
636 DPRINT3("ppp/%d: uwput M_DATA len=%d flags=%x\n",
637 us->mn, msgdsize(mp), us->flags);
638 if (us->ppa == 0 || msgdsize(mp) > us->ppa->mtu + PPP_HDRLEN
640 || (us->flags & US_CONTROL) == 0
643 DPRINT1("pppuwput: junk data len=%d\n", msgdsize(mp));
648 if ((us->flags & US_CONTROL) == 0 && !pass_packet(us, mp, 1))
651 if (!send_data(mp, us))
656 iop = (struct iocblk *) mp->b_rptr;
658 if (us->flags & US_DBGLOG)
659 DPRINT3("ppp/%d: ioctl %x count=%d\n",
660 us->mn, iop->ioc_cmd, iop->ioc_count);
661 switch (iop->ioc_cmd) {
663 case DLIOCRAW: /* raw M_DATA mode */
664 us->flags |= US_RAWDATA;
667 #endif /* defined(SOL2) */
669 if ((us->flags & US_CONTROL) == 0 || us->lowerq != 0)
671 if (mp->b_cont == 0) {
672 DPRINT1("pppuwput/%d: ioctl I_LINK b_cont = 0!\n", us->mn);
675 lb = (struct linkblk *) mp->b_cont->b_rptr;
678 DPRINT1("pppuwput/%d: ioctl I_LINK l_qbot = 0!\n", us->mn);
683 lq->q_ptr = (caddr_t) q;
684 RD(lq)->q_ptr = (caddr_t) us->q;
688 us->flags &= ~US_LASTMOD;
689 /* Unblock upper streams which now feed this lower stream. */
691 /* Send useful information down to the modules which
692 are now linked below us. */
693 putctl2(lq, M_CTL, PPPCTL_UNIT, us->ppa_id);
694 putctl4(lq, M_CTL, PPPCTL_MRU, us->mru);
695 putctl4(lq, M_CTL, PPPCTL_MTU, us->mtu);
697 /* Lower tty driver's queue hiwat/lowat from default 4096/128
698 to 256/128 since we don't want queueing of data on
699 output to physical device */
702 for (tlq = lq; tlq->q_next != NULL; tlq = tlq->q_next)
704 strqset(tlq, QHIWAT, 0, 256);
705 strqset(tlq, QLOWAT, 0, 128);
711 if (mp->b_cont == 0) {
712 DPRINT1("pppuwput/%d: ioctl I_UNLINK b_cont = 0!\n", us->mn);
715 lb = (struct linkblk *) mp->b_cont->b_rptr;
717 if (us->lowerq != lb->l_qbot) {
718 DPRINT2("ppp unlink: lowerq=%x qbot=%x\n",
719 us->lowerq, lb->l_qbot);
724 qwriter(q, mp, detach_lower, PERIM_OUTER);
729 if (us->flags & US_CONTROL)
731 if ((us->flags & US_PRIV) == 0) {
735 /* Arrange to return an int */
736 if ((mq = mp->b_cont) == 0
737 || mq->b_datap->db_lim - mq->b_rptr < sizeof(int)) {
738 mq = allocb(sizeof(int), BPRI_HI);
748 iop->ioc_count = sizeof(int);
749 mq->b_wptr = mq->b_rptr + sizeof(int);
750 qwriter(q, mp, new_ppa, PERIM_OUTER);
755 /* like dlpi_attach, for programs which can't write to
756 the stream (like pppstats) */
757 if (iop->ioc_count != sizeof(int) || us->ppa != 0)
759 if (mp->b_cont == 0) {
760 DPRINT1("pppuwput/%d: ioctl PPPIO_ATTACH b_cont = 0!\n", us->mn);
763 n = *(int *)mp->b_cont->b_rptr;
764 for (ppa = ppas; ppa != 0; ppa = ppa->nextppa)
765 if (ppa->ppa_id == n)
771 qwriter(q, mp, attach_ppa, PERIM_OUTER);
777 /* Attach to a given SAP. */
778 if (iop->ioc_count != sizeof(int) || us->ppa == 0)
780 if (mp->b_cont == 0) {
781 DPRINT1("pppuwput/%d: ioctl PPPIO_BIND b_cont = 0!\n", us->mn);
784 n = *(int *)mp->b_cont->b_rptr;
785 /* n must be a valid PPP network protocol number. */
786 if (n < 0x21 || n > 0x3fff || (n & 0x101) != 1)
788 /* check that no other stream is bound to this sap already. */
789 for (os = us->ppa; os != 0; os = os->next)
801 if (iop->ioc_count != sizeof(int) || (us->flags & US_CONTROL) == 0)
803 if (mp->b_cont == 0) {
804 DPRINT1("pppuwput/%d: ioctl PPPIO_MRU b_cont = 0!\n", us->mn);
807 n = *(int *)mp->b_cont->b_rptr;
808 if (n <= 0 || n > PPP_MAXMRU)
814 putctl4(us->lowerq, M_CTL, PPPCTL_MRU, n);
820 if (iop->ioc_count != sizeof(int) || (us->flags & US_CONTROL) == 0)
822 if (mp->b_cont == 0) {
823 DPRINT1("pppuwput/%d: ioctl PPPIO_MTU b_cont = 0!\n", us->mn);
826 n = *(int *)mp->b_cont->b_rptr;
827 if (n <= 0 || n > PPP_MAXMTU)
831 /* The MTU reported in netstat, not used as IP max packet size! */
832 us->ifstats.ifs_mtu = n;
835 putctl4(us->lowerq, M_CTL, PPPCTL_MTU, n);
841 us->flags |= US_LASTMOD;
846 if (iop->ioc_count != sizeof(int))
848 if (mp->b_cont == 0) {
849 DPRINT1("pppuwput/%d: ioctl PPPIO_DEBUG b_cont = 0!\n", us->mn);
852 n = *(int *)mp->b_cont->b_rptr;
853 if (n == PPPDBG_DUMP + PPPDBG_DRIVER) {
854 qwriter(q, NULL, debug_dump, PERIM_OUTER);
857 } else if (n == PPPDBG_LOG + PPPDBG_DRIVER) {
858 DPRINT1("ppp/%d: debug log enabled\n", us->mn);
859 us->flags |= US_DBGLOG;
863 if (us->ppa == 0 || us->ppa->lowerq == 0)
865 putnext(us->ppa->lowerq, mp);
871 if (iop->ioc_count != 2 * sizeof(int))
873 if ((us->flags & US_CONTROL) == 0)
875 if (mp->b_cont == 0) {
876 DPRINT1("pppuwput/%d: ioctl PPPIO_NPMODE b_cont = 0!\n", us->mn);
879 sap = ((int *)mp->b_cont->b_rptr)[0];
880 for (nps = us->next; nps != 0; nps = nps->next) {
881 if (us->flags & US_DBGLOG)
882 DPRINT2("us = 0x%x, us->next->sap = 0x%x\n", nps, nps->sap);
887 if (us->flags & US_DBGLOG)
888 DPRINT2("ppp/%d: no stream for sap %x\n", us->mn, sap);
891 /* XXX possibly should use qwriter here */
892 nps->npmode = (enum NPmode) ((int *)mp->b_cont->b_rptr)[1];
893 if (nps->npmode != NPMODE_QUEUE && (nps->flags & US_BLOCKED) != 0)
900 if ((ppa = us->ppa) == 0)
902 mq = allocb(sizeof(struct ppp_idle), BPRI_HI);
911 pip = (struct ppp_idle *) mq->b_wptr;
912 pip->xmit_idle = time - ppa->last_sent;
913 pip->recv_idle = time - ppa->last_recv;
914 mq->b_wptr += sizeof(struct ppp_idle);
915 iop->ioc_count = sizeof(struct ppp_idle);
921 /* Sent from IP down to us. Attach the ifstats structure. */
922 if (iop->ioc_count != sizeof(struct ifreq) || us->ppa == 0)
924 ifr = (struct ifreq *)mp->b_cont->b_rptr;
925 /* Find the unit number in the interface name. */
926 for (i = 0; i < IFNAMSIZ; i++) {
927 if (ifr->ifr_name[i] == 0 ||
928 (ifr->ifr_name[i] >= '0' &&
929 ifr->ifr_name[i] <= '9'))
932 us->ifname[i] = ifr->ifr_name[i];
936 /* Convert the unit number to binary. */
937 for (n = 0; i < IFNAMSIZ; i++) {
938 if (ifr->ifr_name[i] == 0) {
942 n = n * 10 + ifr->ifr_name[i] - '0';
946 /* Verify the ppa. */
947 if (us->ppa->ppa_id != n)
951 /* Set up the netstat block. */
952 strncpy (ppa->ifname, us->ifname, IFNAMSIZ);
954 ppa->ifstats.ifs_name = ppa->ifname;
955 ppa->ifstats.ifs_unit = n;
956 ppa->ifstats.ifs_active = us->state != DL_UNBOUND;
957 ppa->ifstats.ifs_mtu = ppa->mtu;
959 /* Link in statistics used by netstat. */
960 ppa->ifstats.ifs_next = ifstats;
961 ifstats = &ppa->ifstats;
968 if (!(us->flags & US_CONTROL)) {
974 ((struct iocblk_in *)iop)->ioc_ifflags = us->ifflags;
979 if (!(us->flags & US_CONTROL)) {
985 us->ifflags = ((struct iocblk_in *)iop)->ioc_ifflags;
990 if (!(us->flags & US_CONTROL)) {
996 us->ifflags |= IFF_RUNNING;
997 ((struct iocblk_in *)iop)->ioc_ifflags |= IFF_RUNNING;
1003 * Vanilla SVR4 systems don't handle SIOCSIFMTU, rather
1004 * they take the MTU from the DL_INFO_ACK we sent in response
1005 * to their DL_INFO_REQ. Fortunately, they will update the
1006 * MTU if we send an unsolicited DL_INFO_ACK up.
1008 if ((mq = allocb(sizeof(dl_info_req_t), BPRI_HI)) == 0)
1009 break; /* should do bufcall */
1010 ((union DL_primitives *)mq->b_rptr)->dl_primitive = DL_INFO_REQ;
1011 mq->b_wptr = mq->b_rptr + sizeof(dl_info_req_t);
1012 dlpi_request(q, mq, us);
1016 case SIOCGIFNETMASK:
1017 case SIOCSIFNETMASK:
1019 case SIOCGIFDSTADDR:
1020 case SIOCSIFDSTADDR:
1024 #endif /* LACHTCP */
1027 if (us->ppa == 0 || us->ppa->lowerq == 0)
1029 us->ioc_id = iop->ioc_id;
1031 switch (iop->ioc_cmd) {
1033 case PPPIO_GETCSTAT:
1034 if (us->flags & US_LASTMOD) {
1038 putnext(us->ppa->lowerq, mp);
1041 if (us->flags & US_PRIV)
1042 putnext(us->ppa->lowerq, mp);
1044 DPRINT1("ppp ioctl %x rejected\n", iop->ioc_cmd);
1053 iop->ioc_error = error;
1054 mp->b_datap->db_type = M_IOCNAK;
1056 } else if (error == 0) {
1057 mp->b_datap->db_type = M_IOCACK;
1063 if (us->flags & US_DBGLOG)
1064 DPRINT2("ppp/%d: flush %x\n", us->mn, *mp->b_rptr);
1065 if (*mp->b_rptr & FLUSHW)
1066 flushq(q, FLUSHDATA);
1067 if (*mp->b_rptr & FLUSHR) {
1068 *mp->b_rptr &= ~FLUSHW;
1083 dlpi_request(q, mp, us)
1088 union DL_primitives *d = (union DL_primitives *) mp->b_rptr;
1089 int size = mp->b_wptr - mp->b_rptr;
1091 upperstr_t *ppa, *os;
1093 dl_info_ack_t *info;
1094 dl_bind_ack_t *ackp;
1095 #if DL_CURRENT_VERSION >= 2
1096 dl_phys_addr_ack_t *paddrack;
1097 static struct ether_addr eaddr = {0};
1100 if (us->flags & US_DBGLOG)
1101 DPRINT3("ppp/%d: dlpi prim %x len=%d\n", us->mn,
1102 d->dl_primitive, size);
1103 switch (d->dl_primitive) {
1105 if (size < sizeof(dl_info_req_t))
1107 if ((reply = allocb(sizeof(dl_info_ack_t), BPRI_HI)) == 0)
1108 break; /* should do bufcall */
1109 reply->b_datap->db_type = M_PCPROTO;
1110 info = (dl_info_ack_t *) reply->b_wptr;
1111 reply->b_wptr += sizeof(dl_info_ack_t);
1112 bzero((caddr_t) info, sizeof(dl_info_ack_t));
1113 info->dl_primitive = DL_INFO_ACK;
1114 info->dl_max_sdu = us->ppa? us->ppa->mtu: PPP_MAXMTU;
1115 info->dl_min_sdu = 1;
1116 info->dl_addr_length = sizeof(uint);
1117 info->dl_mac_type = DL_ETHER; /* a bigger lie */
1118 info->dl_current_state = us->state;
1119 info->dl_service_mode = DL_CLDLS;
1120 info->dl_provider_style = DL_STYLE2;
1121 #if DL_CURRENT_VERSION >= 2
1122 info->dl_sap_length = sizeof(uint);
1123 info->dl_version = DL_CURRENT_VERSION;
1129 if (size < sizeof(dl_attach_req_t))
1131 if (us->state != DL_UNATTACHED || us->ppa != 0) {
1132 dlpi_error(q, us, DL_ATTACH_REQ, DL_OUTSTATE, 0);
1135 for (ppa = ppas; ppa != 0; ppa = ppa->nextppa)
1136 if (ppa->ppa_id == d->attach_req.dl_ppa)
1139 dlpi_error(q, us, DL_ATTACH_REQ, DL_BADPPA, 0);
1143 qwriter(q, mp, attach_ppa, PERIM_OUTER);
1147 if (size < sizeof(dl_detach_req_t))
1149 if (us->state != DL_UNBOUND || us->ppa == 0) {
1150 dlpi_error(q, us, DL_DETACH_REQ, DL_OUTSTATE, 0);
1153 qwriter(q, mp, detach_ppa, PERIM_OUTER);
1157 if (size < sizeof(dl_bind_req_t))
1159 if (us->state != DL_UNBOUND || us->ppa == 0) {
1160 dlpi_error(q, us, DL_BIND_REQ, DL_OUTSTATE, 0);
1164 /* apparently this test fails (unnecessarily?) on some systems */
1165 if (d->bind_req.dl_service_mode != DL_CLDLS) {
1166 dlpi_error(q, us, DL_BIND_REQ, DL_UNSUPPORTED, 0);
1171 /* saps must be valid PPP network protocol numbers,
1172 except that we accept ETHERTYPE_IP in place of PPP_IP. */
1173 sap = d->bind_req.dl_sap;
1177 if (us->flags & US_DBGLOG)
1178 DPRINT2("DL_BIND_REQ: ip gives sap = 0x%x, us = 0x%x", sap, us);
1180 if (sap == ETHERTYPE_IP) /* normal IFF_IPV4 */
1182 else if (sap == ETHERTYPE_IPV6) /* when IFF_IPV6 is set */
1184 else if (sap == ETHERTYPE_ALLSAP) /* snoop gives sap of 0 */
1187 DPRINT2("DL_BIND_REQ: unrecognized sap = 0x%x, us = 0x%x", sap, us);
1188 dlpi_error(q, us, DL_BIND_REQ, DL_BADADDR, 0);
1192 if (sap == ETHERTYPE_IP)
1194 if (sap < 0x21 || sap > 0x3fff || (sap & 0x101) != 1) {
1195 dlpi_error(q, us, DL_BIND_REQ, DL_BADADDR, 0);
1198 #endif /* defined(SOL2) */
1200 /* check that no other stream is bound to this sap already. */
1201 for (os = us->ppa; os != 0; os = os->next)
1205 dlpi_error(q, us, DL_BIND_REQ, DL_NOADDR, 0);
1210 us->state = DL_IDLE;
1212 if ((reply = allocb(sizeof(dl_bind_ack_t) + sizeof(uint),
1214 break; /* should do bufcall */
1215 ackp = (dl_bind_ack_t *) reply->b_wptr;
1216 reply->b_wptr += sizeof(dl_bind_ack_t) + sizeof(uint);
1217 reply->b_datap->db_type = M_PCPROTO;
1218 bzero((caddr_t) ackp, sizeof(dl_bind_ack_t));
1219 ackp->dl_primitive = DL_BIND_ACK;
1221 ackp->dl_addr_length = sizeof(uint);
1222 ackp->dl_addr_offset = sizeof(dl_bind_ack_t);
1223 *(uint *)(ackp+1) = sap;
1228 if (size < sizeof(dl_unbind_req_t))
1230 if (us->state != DL_IDLE) {
1231 dlpi_error(q, us, DL_UNBIND_REQ, DL_OUTSTATE, 0);
1235 us->state = DL_UNBOUND;
1237 us->ppa->ifstats.ifs_active = 0;
1239 dlpi_ok(q, DL_UNBIND_REQ);
1242 case DL_UNITDATA_REQ:
1243 if (size < sizeof(dl_unitdata_req_t))
1245 if (us->state != DL_IDLE) {
1246 dlpi_error(q, us, DL_UNITDATA_REQ, DL_OUTSTATE, 0);
1249 if ((ppa = us->ppa) == 0) {
1250 cmn_err(CE_CONT, "ppp: in state dl_idle but ppa == 0?\n");
1253 len = mp->b_cont == 0? 0: msgdsize(mp->b_cont);
1254 if (len > ppa->mtu) {
1255 DPRINT2("dlpi data too large (%d > %d)\n", len, ppa->mtu);
1261 * Should there be any promiscuous stream(s), send the data
1262 * up for each promiscuous stream that we recognize.
1265 promisc_sendup(ppa, mp->b_cont, us->sap, 0);
1266 #endif /* defined(SOL2) */
1270 /* Extract s_port & d_port from IP-packet, the code is a bit
1271 dirty here, but so am I, too... */
1272 if (mp->b_datap->db_type == M_PROTO && us->sap == PPP_IP
1273 && mp->b_cont != 0) {
1277 u_char band_unset, cur_band, syn;
1278 u_short s_port, d_port;
1280 bb = mp->b_cont->b_rptr; /* bb points to IP-header*/
1281 len = mp->b_cont->b_wptr - mp->b_cont->b_rptr;
1283 s_port = IPPORT_DEFAULT;
1284 d_port = IPPORT_DEFAULT;
1285 if (len >= 20) { /* 20 = minimum length of IP header */
1286 iphlen = (bb[0] & 0x0f) * 4;
1291 if (len >= 20) { /* min length of TCP header */
1292 s_port = (tlh[0] << 8) + tlh[1];
1293 d_port = (tlh[2] << 8) + tlh[3];
1294 syn = tlh[13] & 0x02;
1298 if (len >= 8) { /* min length of UDP header */
1299 s_port = (tlh[0] << 8) + tlh[1];
1300 d_port = (tlh[2] << 8) + tlh[3];
1307 * Now calculate b_band for this packet from the
1308 * port-priority table.
1311 cur_band = max_band;
1314 while (*ptr && band_unset)
1315 if (s_port == *ptr || d_port == *ptr++) {
1316 mp->b_band = cur_band;
1324 mp->b_band = def_band;
1325 /* It may be usable to urge SYN packets a bit */
1330 /* this assumes PPP_HDRLEN <= sizeof(dl_unitdata_req_t) */
1331 if (mp->b_datap->db_ref > 1) {
1332 np = allocb(PPP_HDRLEN, BPRI_HI);
1335 np->b_cont = mp->b_cont;
1340 mp->b_datap->db_type = M_DATA;
1341 /* XXX should use dl_dest_addr_offset/length here,
1342 but we would have to translate ETHERTYPE_IP -> PPP_IP */
1343 mp->b_wptr = mp->b_rptr + PPP_HDRLEN;
1344 mp->b_rptr[0] = PPP_ALLSTATIONS;
1345 mp->b_rptr[1] = PPP_UI;
1346 mp->b_rptr[2] = us->sap >> 8;
1347 mp->b_rptr[3] = us->sap;
1348 if (pass_packet(us, mp, 1)) {
1349 if (!send_data(mp, us))
1354 #if DL_CURRENT_VERSION >= 2
1355 case DL_PHYS_ADDR_REQ:
1356 if (size < sizeof(dl_phys_addr_req_t))
1360 * Don't check state because ifconfig sends this one down too
1363 if ((reply = allocb(sizeof(dl_phys_addr_ack_t)+ETHERADDRL,
1365 break; /* should do bufcall */
1366 reply->b_datap->db_type = M_PCPROTO;
1367 paddrack = (dl_phys_addr_ack_t *) reply->b_wptr;
1368 reply->b_wptr += sizeof(dl_phys_addr_ack_t);
1369 bzero((caddr_t) paddrack, sizeof(dl_phys_addr_ack_t)+ETHERADDRL);
1370 paddrack->dl_primitive = DL_PHYS_ADDR_ACK;
1371 paddrack->dl_addr_length = ETHERADDRL;
1372 paddrack->dl_addr_offset = sizeof(dl_phys_addr_ack_t);
1373 bcopy(&eaddr, reply->b_wptr, ETHERADDRL);
1374 reply->b_wptr += ETHERADDRL;
1379 case DL_PROMISCON_REQ:
1380 if (size < sizeof(dl_promiscon_req_t))
1382 us->flags |= US_PROMISC;
1383 dlpi_ok(q, DL_PROMISCON_REQ);
1386 case DL_PROMISCOFF_REQ:
1387 if (size < sizeof(dl_promiscoff_req_t))
1389 us->flags &= ~US_PROMISC;
1390 dlpi_ok(q, DL_PROMISCOFF_REQ);
1393 case DL_PROMISCON_REQ: /* fall thru */
1394 case DL_PROMISCOFF_REQ: /* fall thru */
1395 #endif /* defined(SOL2) */
1396 #endif /* DL_CURRENT_VERSION >= 2 */
1398 #if DL_CURRENT_VERSION >= 2
1399 case DL_SET_PHYS_ADDR_REQ:
1400 case DL_SUBS_BIND_REQ:
1401 case DL_SUBS_UNBIND_REQ:
1402 case DL_ENABMULTI_REQ:
1403 case DL_DISABMULTI_REQ:
1406 case DL_REPLY_UPDATE_REQ:
1408 case DL_DATA_ACK_REQ:
1410 case DL_CONNECT_REQ:
1412 dlpi_error(q, us, d->dl_primitive, DL_NOTSUPPORTED, 0);
1415 case DL_CONNECT_RES:
1416 case DL_DISCONNECT_REQ:
1419 dlpi_error(q, us, d->dl_primitive, DL_OUTSTATE, 0);
1423 dlpi_error(q, us, d->dl_primitive, DL_BADQOSTYPE, 0);
1426 #if DL_CURRENT_VERSION >= 2
1433 cmn_err(CE_CONT, "ppp: unknown dlpi prim 0x%x\n", d->dl_primitive);
1436 dlpi_error(q, us, d->dl_primitive, DL_BADPRIM, 0);
1443 dlpi_error(q, us, prim, err, uerr)
1446 int prim, err, uerr;
1449 dl_error_ack_t *errp;
1451 if (us->flags & US_DBGLOG)
1452 DPRINT3("ppp/%d: dlpi error, prim=%x, err=%x\n", us->mn, prim, err);
1453 reply = allocb(sizeof(dl_error_ack_t), BPRI_HI);
1455 return; /* XXX should do bufcall */
1456 reply->b_datap->db_type = M_PCPROTO;
1457 errp = (dl_error_ack_t *) reply->b_wptr;
1458 reply->b_wptr += sizeof(dl_error_ack_t);
1459 errp->dl_primitive = DL_ERROR_ACK;
1460 errp->dl_error_primitive = prim;
1461 errp->dl_errno = err;
1462 errp->dl_unix_errno = uerr;
1474 reply = allocb(sizeof(dl_ok_ack_t), BPRI_HI);
1476 return; /* XXX should do bufcall */
1477 reply->b_datap->db_type = M_PCPROTO;
1478 okp = (dl_ok_ack_t *) reply->b_wptr;
1479 reply->b_wptr += sizeof(dl_ok_ack_t);
1480 okp->dl_primitive = DL_OK_ACK;
1481 okp->dl_correct_primitive = prim;
1484 #endif /* NO_DLPI */
1487 pass_packet(us, mp, outbound)
1495 if ((ppa = us->ppa) == 0) {
1500 #ifdef FILTER_PACKETS
1501 pass = ip_hard_filter(us, mp, outbound);
1504 * Here is where we might, in future, decide whether to pass
1505 * or drop the packet, and whether it counts as link activity.
1508 #endif /* FILTER_PACKETS */
1511 /* pass only if link already up, and don't update time */
1512 if (ppa->lowerq == 0) {
1519 ppa->last_sent = time;
1521 ppa->last_recv = time;
1528 * We have some data to send down to the lower stream (or up the
1529 * control stream, if we don't have a lower stream attached).
1530 * Returns 1 if the message was dealt with, 0 if it wasn't able
1531 * to be sent on and should therefore be queued up.
1540 if ((us->flags & US_BLOCKED) || us->npmode == NPMODE_QUEUE)
1543 if (ppa == 0 || us->npmode == NPMODE_DROP || us->npmode == NPMODE_ERROR) {
1544 if (us->flags & US_DBGLOG)
1545 DPRINT2("ppp/%d: dropping pkt (npmode=%d)\n", us->mn, us->npmode);
1549 if (ppa->lowerq == 0) {
1550 /* try to send it up the control stream */
1551 if (bcanputnext(ppa->q, mp->b_band)) {
1553 * The message seems to get corrupted for some reason if
1554 * we just send the message up as it is, so we send a copy.
1556 mblk_t *np = copymsg(mp);
1559 putnext(ppa->q, np);
1563 if (bcanputnext(ppa->lowerq, mp->b_band)) {
1564 MT_ENTER(&ppa->stats_lock);
1565 ppa->stats.ppp_opackets++;
1566 ppa->stats.ppp_obytes += msgdsize(mp);
1567 #ifdef INCR_OPACKETS
1570 MT_EXIT(&ppa->stats_lock);
1572 * The lower queue is only ever detached while holding an
1573 * exclusive lock on the whole driver. So we can be confident
1574 * that the lower queue is still there.
1576 putnext(ppa->lowerq, mp);
1580 us->flags |= US_BLOCKED;
1585 * Allocate a new PPA id and link this stream into the list of PPAs.
1586 * This procedure is called with an exclusive lock on all queues in
1594 upperstr_t *us, *up, **usp;
1597 us = (upperstr_t *) q->q_ptr;
1599 DPRINT("new_ppa: q_ptr = 0!\n");
1605 while ((up = *usp) != 0 && ppa_id == up->ppa_id) {
1609 us->ppa_id = ppa_id;
1614 us->flags |= US_CONTROL;
1615 us->npmode = NPMODE_PASS;
1622 * Create a kstats record for our statistics, so netstat -i works.
1624 if (us->kstats == 0) {
1627 sprintf(unit, "ppp%d", us->ppa->ppa_id);
1628 us->kstats = kstat_create("ppp", us->ppa->ppa_id, unit,
1629 "net", KSTAT_TYPE_NAMED, 4, 0);
1630 if (us->kstats != 0) {
1631 kstat_named_t *kn = KSTAT_NAMED_PTR(us->kstats);
1633 strcpy(kn[0].name, "ipackets");
1634 kn[0].data_type = KSTAT_DATA_ULONG;
1635 strcpy(kn[1].name, "ierrors");
1636 kn[1].data_type = KSTAT_DATA_ULONG;
1637 strcpy(kn[2].name, "opackets");
1638 kn[2].data_type = KSTAT_DATA_ULONG;
1639 strcpy(kn[3].name, "oerrors");
1640 kn[3].data_type = KSTAT_DATA_ULONG;
1641 kstat_install(us->kstats);
1646 *(int *)mp->b_cont->b_rptr = ppa_id;
1647 mp->b_datap->db_type = M_IOCACK;
1658 us = (upperstr_t *) q->q_ptr;
1660 DPRINT("attach_ppa: q_ptr = 0!\n");
1665 us->state = DL_UNBOUND;
1667 for (t = us->ppa; t->next != 0; t = t->next)
1671 if (mp->b_datap->db_type == M_IOCTL) {
1672 mp->b_datap->db_type = M_IOCACK;
1676 dlpi_ok(q, DL_ATTACH_REQ);
1688 us = (upperstr_t *) q->q_ptr;
1690 DPRINT("detach_ppa: q_ptr = 0!\n");
1694 for (t = us->ppa; t->next != 0; t = t->next)
1695 if (t->next == us) {
1702 us->state = DL_UNATTACHED;
1703 dlpi_ok(q, DL_DETACH_REQ);
1708 * We call this with qwriter in order to give the upper queue procedures
1709 * the guarantee that the lower queue is not going to go away while
1710 * they are executing.
1719 us = (upperstr_t *) q->q_ptr;
1721 DPRINT("detach_lower: q_ptr = 0!\n");
1726 us->lowerq->q_ptr = 0;
1727 RD(us->lowerq)->q_ptr = 0;
1731 /* Unblock streams which now feed back up the control stream. */
1734 mp->b_datap->db_type = M_IOCACK;
1742 upperstr_t *us, *as;
1745 us = (upperstr_t *) q->q_ptr;
1747 DPRINT("pppuwsrv: q_ptr = 0!\n");
1752 * If this is a control stream, then this service procedure
1753 * probably got enabled because of flow control in the lower
1754 * stream being enabled (or because of the lower stream going
1755 * away). Therefore we enable the service procedure of all
1756 * attached upper streams.
1758 if (us->flags & US_CONTROL) {
1759 for (as = us->next; as != 0; as = as->next)
1763 /* Try to send on any data queued here. */
1764 us->flags &= ~US_BLOCKED;
1765 while ((mp = getq(q)) != 0) {
1766 if (!send_data(mp, us)) {
1775 /* should never get called... */
1792 * Flow control has back-enabled this stream:
1793 * enable the upper write service procedure for
1794 * the upper control stream for this lower stream.
1797 uq = (queue_t *) q->q_ptr;
1805 * This should only get called for control streams.
1812 upperstr_t *ppa, *us;
1816 ppa = (upperstr_t *) q->q_ptr;
1818 DPRINT("pppurput: q_ptr = 0!\n");
1822 switch (mp->b_datap->db_type) {
1824 MT_ENTER(&ppa->stats_lock);
1825 switch (*mp->b_rptr) {
1830 ppa->stats.ppp_ierrors++;
1836 ppa->stats.ppp_oerrors++;
1839 MT_EXIT(&ppa->stats_lock);
1846 * Attempt to match up the response with the stream
1847 * that the request came from.
1849 iop = (struct iocblk *) mp->b_rptr;
1850 for (us = ppa; us != 0; us = us->next)
1851 if (us->ioc_id == iop->ioc_id)
1861 * The serial device has hung up. We don't want to send
1862 * the M_HANGUP message up to pppd because that will stop
1863 * us from using the control stream any more. Instead we
1864 * send a zero-length message as an end-of-file indication.
1867 mp = allocb(1, BPRI_HI);
1869 DPRINT1("ppp/%d: couldn't allocate eof message!\n", ppa->mn);
1872 putnext(ppa->q, mp);
1876 if (mp->b_datap->db_type == M_DATA) {
1878 if (mp->b_wptr - mp->b_rptr < PPP_HDRLEN) {
1879 PULLUP(mp, PPP_HDRLEN);
1881 DPRINT1("ppp_urput: msgpullup failed (len=%d)\n", len);
1885 MT_ENTER(&ppa->stats_lock);
1886 ppa->stats.ppp_ipackets++;
1887 ppa->stats.ppp_ibytes += len;
1888 #ifdef INCR_IPACKETS
1891 MT_EXIT(&ppa->stats_lock);
1893 proto = PPP_PROTOCOL(mp->b_rptr);
1897 * Should there be any promiscuous stream(s), send the data
1898 * up for each promiscuous stream that we recognize.
1900 promisc_sendup(ppa, mp, proto, 1);
1901 #endif /* defined(SOL2) */
1903 if (proto < 0x8000 && (us = find_dest(ppa, proto)) != 0) {
1905 * A data packet for some network protocol.
1906 * Queue it on the upper stream for that protocol.
1907 * XXX could we just putnext it? (would require thought)
1908 * The rblocked flag is there to ensure that we keep
1909 * messages in order for each network protocol.
1911 if (!pass_packet(us, mp, 0))
1913 if (!us->rblocked && !canput(us->q))
1923 * A control frame, a frame for an unknown protocol,
1924 * or some other message type.
1925 * Send it up to pppd via the control stream.
1927 if (queclass(mp) == QPCTL || canputnext(ppa->q))
1928 putnext(ppa->q, mp);
1941 upperstr_t *us, *as;
1944 dl_unitdata_ind_t *ud;
1948 us = (upperstr_t *) q->q_ptr;
1950 DPRINT("pppursrv: q_ptr = 0!\n");
1954 if (us->flags & US_CONTROL) {
1957 * If there is no lower queue attached, run the write service
1958 * routines of other upper streams attached to this PPA.
1960 if (us->lowerq == 0) {
1963 if (as->flags & US_BLOCKED)
1970 * Messages get queued on this stream's read queue if they
1971 * can't be queued on the read queue of the attached stream
1972 * that they are destined for. This is for flow control -
1973 * when this queue fills up, the lower read put procedure will
1974 * queue messages there and the flow control will propagate
1977 while ((mp = getq(q)) != 0) {
1978 proto = PPP_PROTOCOL(mp->b_rptr);
1979 if (proto < 0x8000 && (as = find_dest(us, proto)) != 0) {
1992 /* can now put stuff directly on network protocol streams again */
1993 for (as = us->next; as != 0; as = as->next)
1998 * If this stream has a lower stream attached,
1999 * enable the read queue's service routine.
2000 * XXX we should really only do this if the queue length
2001 * has dropped below the low-water mark.
2003 if (us->lowerq != 0)
2004 qenable(RD(us->lowerq));
2008 * A network protocol stream. Put a DLPI header on each
2009 * packet and send it on.
2010 * (Actually, it seems that the IP module will happily
2011 * accept M_DATA messages without the DL_UNITDATA_IND header.)
2013 while ((mp = getq(q)) != 0) {
2014 if (!canputnext(q)) {
2019 proto = PPP_PROTOCOL(mp->b_rptr);
2020 mp->b_rptr += PPP_HDRLEN;
2021 hdr = allocb(sizeof(dl_unitdata_ind_t) + 2 * sizeof(uint),
2024 /* XXX should put it back and use bufcall */
2028 hdr->b_datap->db_type = M_PROTO;
2029 ud = (dl_unitdata_ind_t *) hdr->b_wptr;
2030 hdr->b_wptr += sizeof(dl_unitdata_ind_t) + 2 * sizeof(uint);
2032 ud->dl_primitive = DL_UNITDATA_IND;
2033 ud->dl_dest_addr_length = sizeof(uint);
2034 ud->dl_dest_addr_offset = sizeof(dl_unitdata_ind_t);
2035 ud->dl_src_addr_length = sizeof(uint);
2036 ud->dl_src_addr_offset = ud->dl_dest_addr_offset + sizeof(uint);
2037 #if DL_CURRENT_VERSION >= 2
2038 ud->dl_group_address = 0;
2040 /* Send the DLPI client the data with the SAP they requested,
2041 (e.g. ETHERTYPE_IP) rather than the PPP protocol number
2043 ((uint *)(ud + 1))[0] = us->req_sap; /* dest SAP */
2044 ((uint *)(ud + 1))[1] = us->req_sap; /* src SAP */
2048 #endif /* NO_DLPI */
2051 * Now that we have consumed some packets from this queue,
2052 * enable the control stream's read service routine so that we
2053 * can process any packets for us that might have got queued
2054 * there for flow control reasons.
2057 qenable(us->ppa->q);
2064 find_dest(ppa, proto)
2070 for (us = ppa->next; us != 0; us = us->next)
2071 if (proto == us->sap)
2078 * Test upstream promiscuous conditions. As of now, only pass IPv4 and
2079 * Ipv6 packets upstream (let PPP packets be decoded elsewhere).
2082 find_promisc(us, proto)
2087 if ((proto != PPP_IP) && (proto != PPP_IPV6))
2088 return (upperstr_t *)0;
2090 for ( ; us; us = us->next) {
2091 if ((us->flags & US_PROMISC) && (us->state == DL_IDLE))
2095 return (upperstr_t *)0;
2099 * Prepend an empty Ethernet header to msg for snoop, et al.
2102 prepend_ether(us, mp, proto)
2110 if ((eh = allocb(sizeof(struct ether_header), BPRI_HI)) == 0) {
2115 if (proto == PPP_IP)
2116 type = ETHERTYPE_IP;
2117 else if (proto == PPP_IPV6)
2118 type = ETHERTYPE_IPV6;
2120 type = proto; /* What else? Let decoder decide */
2122 eh->b_wptr += sizeof(struct ether_header);
2123 bzero((caddr_t)eh->b_rptr, sizeof(struct ether_header));
2124 ((struct ether_header *)eh->b_rptr)->ether_type = htons((short)type);
2130 * Prepend DL_UNITDATA_IND mblk to msg
2133 prepend_udind(us, mp, proto)
2138 dl_unitdata_ind_t *dlu;
2142 size = sizeof(dl_unitdata_ind_t);
2143 if ((dh = allocb(size, BPRI_MED)) == 0) {
2148 dh->b_datap->db_type = M_PROTO;
2149 dh->b_wptr = dh->b_datap->db_lim;
2150 dh->b_rptr = dh->b_wptr - size;
2152 dlu = (dl_unitdata_ind_t *)dh->b_rptr;
2153 dlu->dl_primitive = DL_UNITDATA_IND;
2154 dlu->dl_dest_addr_length = 0;
2155 dlu->dl_dest_addr_offset = sizeof(dl_unitdata_ind_t);
2156 dlu->dl_src_addr_length = 0;
2157 dlu->dl_src_addr_offset = sizeof(dl_unitdata_ind_t);
2158 dlu->dl_group_address = 0;
2165 * For any recognized promiscuous streams, send data upstream
2168 promisc_sendup(ppa, mp, proto, skip)
2173 mblk_t *dup_mp, *dup_dup_mp;
2174 upperstr_t *prus, *nprus;
2176 if ((prus = find_promisc(ppa, proto)) != 0) {
2177 if (dup_mp = dupmsg(mp)) {
2180 dup_mp->b_rptr += PPP_HDRLEN;
2182 for ( ; nprus = find_promisc(prus->next, proto);
2185 if (dup_dup_mp = dupmsg(dup_mp)) {
2186 if (canputnext(prus->q)) {
2187 if (prus->flags & US_RAWDATA) {
2188 dup_dup_mp = prepend_ether(prus, dup_dup_mp, proto);
2189 putnext(prus->q, dup_dup_mp);
2191 dup_dup_mp = prepend_udind(prus, dup_dup_mp, proto);
2192 putnext(prus->q, dup_dup_mp);
2195 DPRINT("ppp_urput: data to promisc q dropped\n");
2196 freemsg(dup_dup_mp);
2201 if (canputnext(prus->q)) {
2202 if (prus->flags & US_RAWDATA) {
2203 dup_mp = prepend_ether(prus, dup_mp, proto);
2204 putnext(prus->q, dup_mp);
2206 dup_mp = prepend_udind(prus, dup_mp, proto);
2207 putnext(prus->q, dup_mp);
2210 DPRINT("ppp_urput: data to promisc q dropped\n");
2216 #endif /* defined(SOL2) */
2219 * We simply put the message on to the associated upper control stream
2220 * (either here or in ppplrsrv). That way we enter the perimeters
2221 * before looking through the list of attached streams to decide which
2222 * stream it should go up.
2232 switch (mp->b_datap->db_type) {
2234 iop = (struct iocblk *) mp->b_rptr;
2235 iop->ioc_error = EINVAL;
2236 mp->b_datap->db_type = M_IOCNAK;
2240 if (*mp->b_rptr & FLUSHR)
2241 flushq(q, FLUSHDATA);
2242 if (*mp->b_rptr & FLUSHW) {
2243 *mp->b_rptr &= ~FLUSHR;
2251 * If we can't get the lower lock straight away, queue this one
2252 * rather than blocking, to avoid the possibility of deadlock.
2254 if (!TRYLOCK_LOWER_R) {
2260 * Check that we're still connected to the driver.
2262 uq = (queue_t *) q->q_ptr;
2265 DPRINT1("ppplrput: q = %x, uq = 0??\n", q);
2271 * Try to forward the message to the put routine for the upper
2272 * control stream for this lower stream.
2273 * If there are already messages queued here, queue this one so
2274 * they don't get out of order.
2276 if (queclass(mp) == QPCTL || (qsize(q) == 0 && canput(uq)))
2293 * Packets get queued here for flow control reasons
2294 * or if the lrput routine couldn't get the lower lock
2298 uq = (queue_t *) q->q_ptr;
2301 flushq(q, FLUSHALL);
2302 DPRINT1("ppplrsrv: q = %x, uq = 0??\n", q);
2305 while ((mp = getq(q)) != 0) {
2306 if (queclass(mp) == QPCTL || canput(uq))
2318 putctl2(q, type, code, val)
2320 int type, code, val;
2324 mp = allocb(2, BPRI_HI);
2327 mp->b_datap->db_type = type;
2328 mp->b_wptr[0] = code;
2329 mp->b_wptr[1] = val;
2336 putctl4(q, type, code, val)
2338 int type, code, val;
2342 mp = allocb(4, BPRI_HI);
2345 mp->b_datap->db_type = type;
2346 mp->b_wptr[0] = code;
2347 ((short *)mp->b_wptr)[1] = val;
2361 DPRINT("ppp upper streams:\n");
2362 for (us = minor_devs; us != 0; us = us->nextmn) {
2364 DPRINT3(" %d: q=%x rlev=%d",
2365 us->mn, uq, (uq? qsize(uq): 0));
2366 DPRINT3(" wlev=%d flags=0x%b", (uq? qsize(WR(uq)): 0),
2367 us->flags, "\020\1priv\2control\3blocked\4last");
2368 DPRINT3(" state=%x sap=%x req_sap=%x", us->state, us->sap,
2373 DPRINT1(" ppa=%d\n", us->ppa->ppa_id);
2374 if (us->flags & US_CONTROL) {
2376 DPRINT3(" control for %d lq=%x rlev=%d",
2377 us->ppa_id, lq, (lq? qsize(RD(lq)): 0));
2378 DPRINT3(" wlev=%d mru=%d mtu=%d\n",
2379 (lq? qsize(lq): 0), us->mru, us->mtu);
2382 mp->b_datap->db_type = M_IOCACK;
2386 #ifdef FILTER_PACKETS
2387 #include <netinet/in_systm.h>
2388 #include <netinet/ip.h>
2389 #include <netinet/udp.h>
2390 #include <netinet/tcp.h>
2392 #define MAX_IPHDR 128 /* max TCP/IP header size */
2395 /* The following table contains a hard-coded list of protocol/port pairs.
2396 * Any matching packets are either discarded unconditionally, or,
2397 * if ok_if_link_up is non-zero when a connection does not currently exist
2398 * (i.e., they go through if the connection is present, but never initiate
2400 * This idea came from a post by dm@garage.uun.org (David Mazieres)
2402 static struct pktfilt_tab {
2405 u_short ok_if_link_up;
2407 { IPPROTO_UDP, 520, 1 }, /* RIP, ok to pass if link is up */
2408 { IPPROTO_UDP, 123, 1 }, /* NTP, don't keep up the link for it */
2409 { -1, 0, 0 } /* terminator entry has port == -1 */
2414 ip_hard_filter(us, mp, outbound)
2420 struct pktfilt_tab *pft;
2426 /* Note, the PPP header has already been pulled up in all cases */
2427 proto = PPP_PROTOCOL(mp->b_rptr);
2428 if (us->flags & US_DBGLOG)
2429 DPRINT3("ppp/%d: filter, proto=0x%x, out=%d\n", us->mn, proto, outbound);
2434 if ((mp->b_wptr - mp->b_rptr) == PPP_HDRLEN && mp->b_cont != 0) {
2435 temp_mp = mp->b_cont;
2436 len = msgdsize(temp_mp);
2437 hlen = (len < MAX_IPHDR) ? len : MAX_IPHDR;
2438 PULLUP(temp_mp, hlen);
2440 DPRINT2("ppp/%d: filter, pullup next failed, len=%d\n",
2442 mp->b_cont = 0; /* PULLUP() freed the rest */
2446 ip = (struct ip *)mp->b_cont->b_rptr;
2450 hlen = (len < (PPP_HDRLEN+MAX_IPHDR)) ? len : (PPP_HDRLEN+MAX_IPHDR);
2453 DPRINT2("ppp/%d: filter, pullup failed, len=%d\n",
2457 ip = (struct ip *)(mp->b_rptr + PPP_HDRLEN);
2460 /* For IP traffic, certain packets (e.g., RIP) may be either
2461 * 1. ignored - dropped completely
2462 * 2. will not initiate a connection, but
2463 * will be passed if a connection is currently up.
2465 for (pft=pktfilt_tab; pft->proto != -1; pft++) {
2466 if (ip->ip_p == pft->proto) {
2467 switch(pft->proto) {
2469 if (((struct udphdr *) &((int *)ip)[ip->ip_hl])->uh_dport
2470 == htons(pft->port)) goto endfor;
2473 if (((struct tcphdr *) &((int *)ip)[ip->ip_hl])->th_dport
2474 == htons(pft->port)) goto endfor;
2480 if (pft->proto != -1) {
2481 if (us->flags & US_DBGLOG)
2482 DPRINT3("ppp/%d: found IP pkt, proto=0x%x (%d)\n",
2483 us->mn, pft->proto, pft->port);
2484 /* Discard if not connected, or if not pass_with_link_up */
2485 /* else, if link is up let go by, but don't update time */
2486 return pft->ok_if_link_up? -1: 0;
2489 } /* end switch (proto) */
2493 #endif /* FILTER_PACKETS */