2 * ppp.c - STREAMS multiplexing pseudo-device driver for PPP.
4 * Copyright (c) 1994 The Australian National University.
7 * Permission to use, copy, modify, and distribute this software and its
8 * documentation is hereby granted, provided that the above copyright
9 * notice appears in all copies. This software is provided without any
10 * warranty, express or implied. The Australian National University
11 * makes no representations about the suitability of this software for
14 * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY
15 * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
16 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
17 * THE AUSTRALIAN NATIONAL UNIVERSITY HAS BEEN ADVISED OF THE POSSIBILITY
20 * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
21 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
22 * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
23 * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO
24 * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
27 * $Id: ppp.c,v 1.24 1999/10/06 23:00:43 masputra Exp $
31 * This file is used under Solaris 2, SVR4, SunOS 4, and Digital UNIX.
34 #include <sys/types.h>
35 #include <sys/param.h>
37 #include <sys/stream.h>
38 #include <sys/stropts.h>
39 #include <sys/errno.h>
41 #include <sys/ioctl.h>
42 #include <sys/cmn_err.h>
43 #define queclass(mp) ((mp)->b_band & QPCTL)
45 #include <sys/ioccom.h>
49 #include <sys/cmn_err.h>
54 #include <sys/ksynch.h>
55 #include <sys/kstat.h>
56 #include <sys/sunddi.h>
57 #include <sys/ethernet.h>
59 #include <sys/socket.h>
60 #include <sys/sockio.h>
62 #include <netinet/in.h>
67 #include <net/ppp_defs.h>
68 #include <net/pppio.h>
72 * Modifications marked with #ifdef PRIOQ are for priority queueing of
73 * interactive traffic, and are due to Marko Zec <zec@japa.tel.fer.hr>.
76 #include <netinet/in.h>
86 * The IP module may use this SAP value for IP packets.
89 #define ETHERTYPE_IP 0x800
92 #if !defined(ETHERTYPE_IPV6)
93 #define ETHERTYPE_IPV6 0x86dd
94 #endif /* !defined(ETHERTYPE_IPV6) */
96 #if !defined(ETHERTYPE_ALLSAP) && defined(SOL2)
97 #define ETHERTYPE_ALLSAP 0
98 #endif /* !defined(ETHERTYPE_ALLSAP) && defined(SOL2) */
100 #if !defined(PPP_ALLSAP) && defined(SOL2)
101 #define PPP_ALLSAP PPP_ALLSTATIONS
102 #endif /* !defined(PPP_ALLSAP) && defined(SOL2) */
108 * We use this reader-writer lock to ensure that the lower streams
109 * stay connected to the upper streams while the lower-side put and
110 * service procedures are running. Essentially it is an existence
111 * lock for the upper stream associated with each lower stream.
113 krwlock_t ppp_lower_lock;
114 #define LOCK_LOWER_W rw_enter(&ppp_lower_lock, RW_WRITER)
115 #define LOCK_LOWER_R rw_enter(&ppp_lower_lock, RW_READER)
116 #define TRYLOCK_LOWER_R rw_tryenter(&ppp_lower_lock, RW_READER)
117 #define UNLOCK_LOWER rw_exit(&ppp_lower_lock)
119 #define MT_ENTER(x) mutex_enter(x)
120 #define MT_EXIT(x) mutex_exit(x)
123 * Notes on multithreaded implementation for Solaris 2:
125 * We use an inner perimeter around each queue pair and an outer
126 * perimeter around the whole driver. The inner perimeter is
127 * entered exclusively for all entry points (open, close, put,
128 * service). The outer perimeter is entered exclusively for open
129 * and close and shared for put and service. This is all done for
130 * us by the streams framework.
132 * I used to think that the perimeters were entered for the lower
133 * streams' put and service routines as well as for the upper streams'.
134 * Because of problems experienced by people, and after reading the
135 * documentation more closely, I now don't think that is true. So we
136 * now use ppp_lower_lock to give us an existence guarantee on the
137 * upper stream controlling each lower stream.
139 * Shared entry to the outer perimeter protects the existence of all
140 * the upper streams and their upperstr_t structures, and guarantees
141 * that the following fields of any upperstr_t won't change:
142 * nextmn, next, nextppa. It guarantees that the lowerq field of an
143 * upperstr_t won't go from non-zero to zero, that the global `ppas'
144 * won't change and that the no lower stream will get unlinked.
146 * Shared (reader) access to ppa_lower_lock guarantees that no lower
147 * stream will be unlinked and that the lowerq field of all upperstr_t
148 * structures won't change.
152 #define LOCK_LOWER_W 0
153 #define LOCK_LOWER_R 0
154 #define TRYLOCK_LOWER_R 1
155 #define UNLOCK_LOWER 0
156 #define MT_ENTER(x) 0
162 * Private information; one per upper stream.
164 typedef struct upperstr {
165 minor_t mn; /* minor device number */
166 struct upperstr *nextmn; /* next minor device */
167 queue_t *q; /* read q associated with this upper stream */
168 int flags; /* flag bits, see below */
169 int state; /* current DLPI state */
170 int sap; /* service access point */
171 int req_sap; /* which SAP the DLPI client requested */
172 struct upperstr *ppa; /* control stream for our ppa */
173 struct upperstr *next; /* next stream for this ppa */
174 uint ioc_id; /* last ioctl ID for this stream */
175 enum NPmode npmode; /* what to do with packets on this SAP */
176 unsigned char rblocked; /* flow control has blocked upper read strm */
177 /* N.B. rblocked is only changed by control stream's put/srv procs */
179 * There is exactly one control stream for each PPA.
180 * The following fields are only used for control streams.
183 queue_t *lowerq; /* write queue attached below this PPA */
184 struct upperstr *nextppa; /* next control stream */
187 struct pppstat stats; /* statistics */
188 time_t last_sent; /* time last NP packet sent */
189 time_t last_recv; /* time last NP packet rcvd */
191 kmutex_t stats_lock; /* lock for stats updates */
192 kstat_t *kstats; /* stats for netstat */
196 char ifname[IFNAMSIZ];
197 struct ifstats ifstats;
201 /* Values for flags */
202 #define US_PRIV 1 /* stream was opened by superuser */
203 #define US_CONTROL 2 /* stream is a control stream */
204 #define US_BLOCKED 4 /* flow ctrl has blocked lower write stream */
205 #define US_LASTMOD 8 /* no PPP modules below us */
206 #define US_DBGLOG 0x10 /* log various occurrences */
207 #define US_RBLOCKED 0x20 /* flow ctrl has blocked upper read stream */
210 #if DL_CURRENT_VERSION >= 2
211 #define US_PROMISC 0x40 /* stream is promiscuous */
212 #endif /* DL_CURRENT_VERSION >= 2 */
213 #define US_RAWDATA 0x80 /* raw M_DATA, no DLPI header */
214 #endif /* defined(SOL2) */
217 static u_char max_band=0;
218 static u_char def_band=0;
220 #define IPPORT_DEFAULT 65535
223 * Port priority table
224 * Highest priority ports are listed first, lowest are listed last.
225 * ICMP & packets using unlisted ports will be treated as "default".
226 * If IPPORT_DEFAULT is not listed here, "default" packets will be
227 * assigned lowest priority.
228 * Each line should be terminated with "0".
229 * Line containing only "0" marks the end of the list.
232 static u_short prioq_table[]= {
234 22, 23, 513, 517, 518, 0,
238 20, 70, 80, 8001, 8008, 8080, 0, /* 8001,8008,8080 - common proxy ports */
244 static upperstr_t *minor_devs = NULL;
245 static upperstr_t *ppas = NULL;
248 static int pppopen __P((queue_t *, dev_t *, int, int, cred_t *));
249 static int pppclose __P((queue_t *, int, cred_t *));
251 static int pppopen __P((queue_t *, int, int, int));
252 static int pppclose __P((queue_t *, int));
254 static int pppurput __P((queue_t *, mblk_t *));
255 static int pppuwput __P((queue_t *, mblk_t *));
256 static int pppursrv __P((queue_t *));
257 static int pppuwsrv __P((queue_t *));
258 static int ppplrput __P((queue_t *, mblk_t *));
259 static int ppplwput __P((queue_t *, mblk_t *));
260 static int ppplrsrv __P((queue_t *));
261 static int ppplwsrv __P((queue_t *));
263 static void dlpi_request __P((queue_t *, mblk_t *, upperstr_t *));
264 static void dlpi_error __P((queue_t *, upperstr_t *, int, int, int));
265 static void dlpi_ok __P((queue_t *, int));
267 static int send_data __P((mblk_t *, upperstr_t *));
268 static void new_ppa __P((queue_t *, mblk_t *));
269 static void attach_ppa __P((queue_t *, mblk_t *));
270 static void detach_ppa __P((queue_t *, mblk_t *));
271 static void detach_lower __P((queue_t *, mblk_t *));
272 static void debug_dump __P((queue_t *, mblk_t *));
273 static upperstr_t *find_dest __P((upperstr_t *, int));
275 static upperstr_t *find_promisc __P((upperstr_t *, int));
276 static mblk_t *prepend_ether __P((upperstr_t *, mblk_t *, int));
277 static mblk_t *prepend_udind __P((upperstr_t *, mblk_t *, int));
278 static void promisc_sendup __P((upperstr_t *, mblk_t *, int, int));
279 #endif /* defined(SOL2) */
280 static int putctl2 __P((queue_t *, int, int, int));
281 static int putctl4 __P((queue_t *, int, int, int));
282 static int pass_packet __P((upperstr_t *ppa, mblk_t *mp, int outbound));
283 #ifdef FILTER_PACKETS
284 static int ip_hard_filter __P((upperstr_t *ppa, mblk_t *mp, int outbound));
285 #endif /* FILTER_PACKETS */
287 #define PPP_ID 0xb1a6
288 static struct module_info ppp_info = {
290 PPP_ID, "ppp", 0, 512, 512, 384
292 PPP_ID, "ppp", 0, 512, 512, 128
296 static struct qinit pppurint = {
297 pppurput, pppursrv, pppopen, pppclose, NULL, &ppp_info, NULL
300 static struct qinit pppuwint = {
301 pppuwput, pppuwsrv, NULL, NULL, NULL, &ppp_info, NULL
304 static struct qinit ppplrint = {
305 ppplrput, ppplrsrv, NULL, NULL, NULL, &ppp_info, NULL
308 static struct qinit ppplwint = {
309 ppplwput, ppplwsrv, NULL, NULL, NULL, &ppp_info, NULL
313 extern struct ifstats *ifstats;
317 struct streamtab pppinfo = {
318 &pppurint, &pppuwint,
325 * How we maintain statistics.
328 #define INCR_IPACKETS(ppa) \
329 if (ppa->kstats != 0) { \
330 KSTAT_NAMED_PTR(ppa->kstats)[0].value.ul++; \
332 #define INCR_IERRORS(ppa) \
333 if (ppa->kstats != 0) { \
334 KSTAT_NAMED_PTR(ppa->kstats)[1].value.ul++; \
336 #define INCR_OPACKETS(ppa) \
337 if (ppa->kstats != 0) { \
338 KSTAT_NAMED_PTR(ppa->kstats)[2].value.ul++; \
340 #define INCR_OERRORS(ppa) \
341 if (ppa->kstats != 0) { \
342 KSTAT_NAMED_PTR(ppa->kstats)[3].value.ul++; \
347 #define INCR_IPACKETS(ppa) ppa->ifstats.ifs_ipackets++;
348 #define INCR_IERRORS(ppa) ppa->ifstats.ifs_ierrors++;
349 #define INCR_OPACKETS(ppa) ppa->ifstats.ifs_opackets++;
350 #define INCR_OERRORS(ppa) ppa->ifstats.ifs_oerrors++;
354 * STREAMS driver entry points.
358 pppopen(q, devp, oflag, sflag, credp)
364 pppopen(q, dev, oflag, sflag)
366 int dev; /* really dev_t */
379 DRV_OPEN_OK(dev); /* device is already open */
382 /* Calculate max_bband & def_band from definitions in prioq.h
383 This colud be done at some more approtiate time (less often)
384 but this way it works well so I'll just leave it here */
392 if (*ptr++ == IPPORT_DEFAULT) {
396 max_band += new_band;
400 def_band = max_band - def_band;
404 if (sflag == CLONEOPEN) {
406 for (prevp = &minor_devs; (up = *prevp) != 0; prevp = &up->nextmn) {
413 mn = getminor(*devp);
417 for (prevp = &minor_devs; (up = *prevp) != 0; prevp = &up->nextmn) {
422 /* this can't happen */
423 q->q_ptr = WR(q)->q_ptr = (caddr_t) up;
429 * Construct a new minor node.
431 up = (upperstr_t *) ALLOC_SLEEP(sizeof(upperstr_t));
432 bzero((caddr_t) up, sizeof(upperstr_t));
434 DPRINT("pppopen: out of kernel memory\n");
441 *devp = makedevice(getmajor(*devp), mn);
445 up->flags |= US_PRIV;
447 up->state = DL_UNATTACHED;
450 up->ifflags = IFF_UP | IFF_POINTOPOINT;
453 up->last_sent = up->last_recv = time;
454 up->npmode = NPMODE_DROP;
455 q->q_ptr = (caddr_t) up;
456 WR(q)->q_ptr = (caddr_t) up;
459 mutex_init(&up->stats_lock, NULL, MUTEX_DRIVER, NULL);
464 DRV_OPEN_OK(makedev(major(dev), mn));
469 pppclose(q, flag, credp)
479 upperstr_t *up, **upp;
480 upperstr_t *as, *asnext;
485 up = (upperstr_t *) q->q_ptr;
487 DPRINT("pppclose: q_ptr = 0\n");
490 if (up->flags & US_DBGLOG)
491 DPRINT2("ppp/%d: close, flags=%x\n", up->mn, up->flags);
492 if (up->flags & US_CONTROL) {
494 struct ifstats *ifp, *pifp;
496 if (up->lowerq != 0) {
497 /* Gack! the lower stream should have be unlinked earlier! */
498 DPRINT1("ppp%d: lower stream still connected on close?\n",
501 up->lowerq->q_ptr = 0;
502 RD(up->lowerq)->q_ptr = 0;
508 * This stream represents a PPA:
509 * For all streams attached to the PPA, clear their
510 * references to this PPA.
511 * Then remove this PPA from the list of PPAs.
513 for (as = up->next; as != 0; as = asnext) {
517 if (as->flags & US_BLOCKED) {
518 as->flags &= ~US_BLOCKED;
519 flushq(WR(as->q), FLUSHDATA);
522 for (upp = &ppas; *upp != 0; upp = &(*upp)->nextppa)
528 /* Remove the statistics from the active list. */
529 for (ifp = ifstats, pifp = 0; ifp; ifp = ifp->ifs_next) {
530 if (ifp == &up->ifstats) {
532 pifp->ifs_next = ifp->ifs_next;
534 ifstats = ifp->ifs_next;
542 * If this stream is attached to a PPA,
543 * remove it from the PPA's list.
545 if ((as = up->ppa) != 0) {
546 for (; as->next != 0; as = as->next)
547 if (as->next == up) {
556 kstat_delete(up->kstats);
557 mutex_destroy(&up->stats_lock);
563 for (prevp = &minor_devs; *prevp != 0; prevp = &(*prevp)->nextmn) {
569 FREE(up, sizeof(upperstr_t));
576 * A message from on high. We do one of three things:
578 * - put the message on the lower write stream
579 * - queue it for our service routine
586 upperstr_t *us, *ppa, *nps;
596 struct ppp_idle *pip;
604 us = (upperstr_t *) q->q_ptr;
606 DPRINT("pppuwput: q_ptr = 0!\n");
610 DPRINT1("pppuwput/%d: mp = 0!\n", us->mn);
613 if (mp->b_datap == 0) {
614 DPRINT1("pppuwput/%d: mp->b_datap = 0!\n", us->mn);
617 switch (mp->b_datap->db_type) {
621 dlpi_request(q, mp, us);
626 if (us->flags & US_DBGLOG)
627 DPRINT3("ppp/%d: uwput M_DATA len=%d flags=%x\n",
628 us->mn, msgdsize(mp), us->flags);
629 if (us->ppa == 0 || msgdsize(mp) > us->ppa->mtu + PPP_HDRLEN
631 || (us->flags & US_CONTROL) == 0
634 DPRINT1("pppuwput: junk data len=%d\n", msgdsize(mp));
639 if ((us->flags & US_CONTROL) == 0 && !pass_packet(us, mp, 1))
642 if (!send_data(mp, us))
647 iop = (struct iocblk *) mp->b_rptr;
649 if (us->flags & US_DBGLOG)
650 DPRINT3("ppp/%d: ioctl %x count=%d\n",
651 us->mn, iop->ioc_cmd, iop->ioc_count);
652 switch (iop->ioc_cmd) {
654 case DLIOCRAW: /* raw M_DATA mode */
655 us->flags |= US_RAWDATA;
658 #endif /* defined(SOL2) */
660 if ((us->flags & US_CONTROL) == 0 || us->lowerq != 0)
662 if (mp->b_cont == 0) {
663 DPRINT1("pppuwput/%d: ioctl I_LINK b_cont = 0!\n", us->mn);
666 lb = (struct linkblk *) mp->b_cont->b_rptr;
669 DPRINT1("pppuwput/%d: ioctl I_LINK l_qbot = 0!\n", us->mn);
674 lq->q_ptr = (caddr_t) q;
675 RD(lq)->q_ptr = (caddr_t) us->q;
679 us->flags &= ~US_LASTMOD;
680 /* Unblock upper streams which now feed this lower stream. */
682 /* Send useful information down to the modules which
683 are now linked below us. */
684 putctl2(lq, M_CTL, PPPCTL_UNIT, us->ppa_id);
685 putctl4(lq, M_CTL, PPPCTL_MRU, us->mru);
686 putctl4(lq, M_CTL, PPPCTL_MTU, us->mtu);
688 /* Lower tty driver's queue hiwat/lowat from default 4096/128
689 to 256/128 since we don't want queueing of data on
690 output to physical device */
693 for (tlq = lq; tlq->q_next != NULL; tlq = tlq->q_next)
695 strqset(tlq, QHIWAT, 0, 256);
696 strqset(tlq, QLOWAT, 0, 128);
702 if (mp->b_cont == 0) {
703 DPRINT1("pppuwput/%d: ioctl I_UNLINK b_cont = 0!\n", us->mn);
706 lb = (struct linkblk *) mp->b_cont->b_rptr;
708 if (us->lowerq != lb->l_qbot) {
709 DPRINT2("ppp unlink: lowerq=%x qbot=%x\n",
710 us->lowerq, lb->l_qbot);
715 qwriter(q, mp, detach_lower, PERIM_OUTER);
720 if (us->flags & US_CONTROL)
722 if ((us->flags & US_PRIV) == 0) {
726 /* Arrange to return an int */
727 if ((mq = mp->b_cont) == 0
728 || mq->b_datap->db_lim - mq->b_rptr < sizeof(int)) {
729 mq = allocb(sizeof(int), BPRI_HI);
739 iop->ioc_count = sizeof(int);
740 mq->b_wptr = mq->b_rptr + sizeof(int);
741 qwriter(q, mp, new_ppa, PERIM_OUTER);
746 /* like dlpi_attach, for programs which can't write to
747 the stream (like pppstats) */
748 if (iop->ioc_count != sizeof(int) || us->ppa != 0)
750 if (mp->b_cont == 0) {
751 DPRINT1("pppuwput/%d: ioctl PPPIO_ATTACH b_cont = 0!\n", us->mn);
754 n = *(int *)mp->b_cont->b_rptr;
755 for (ppa = ppas; ppa != 0; ppa = ppa->nextppa)
756 if (ppa->ppa_id == n)
762 qwriter(q, mp, attach_ppa, PERIM_OUTER);
768 /* Attach to a given SAP. */
769 if (iop->ioc_count != sizeof(int) || us->ppa == 0)
771 if (mp->b_cont == 0) {
772 DPRINT1("pppuwput/%d: ioctl PPPIO_BIND b_cont = 0!\n", us->mn);
775 n = *(int *)mp->b_cont->b_rptr;
776 /* n must be a valid PPP network protocol number. */
777 if (n < 0x21 || n > 0x3fff || (n & 0x101) != 1)
779 /* check that no other stream is bound to this sap already. */
780 for (os = us->ppa; os != 0; os = os->next)
792 if (iop->ioc_count != sizeof(int) || (us->flags & US_CONTROL) == 0)
794 if (mp->b_cont == 0) {
795 DPRINT1("pppuwput/%d: ioctl PPPIO_MRU b_cont = 0!\n", us->mn);
798 n = *(int *)mp->b_cont->b_rptr;
799 if (n <= 0 || n > PPP_MAXMRU)
805 putctl4(us->lowerq, M_CTL, PPPCTL_MRU, n);
811 if (iop->ioc_count != sizeof(int) || (us->flags & US_CONTROL) == 0)
813 if (mp->b_cont == 0) {
814 DPRINT1("pppuwput/%d: ioctl PPPIO_MTU b_cont = 0!\n", us->mn);
817 n = *(int *)mp->b_cont->b_rptr;
818 if (n <= 0 || n > PPP_MAXMTU)
822 /* The MTU reported in netstat, not used as IP max packet size! */
823 us->ifstats.ifs_mtu = n;
826 putctl4(us->lowerq, M_CTL, PPPCTL_MTU, n);
832 us->flags |= US_LASTMOD;
837 if (iop->ioc_count != sizeof(int))
839 if (mp->b_cont == 0) {
840 DPRINT1("pppuwput/%d: ioctl PPPIO_DEBUG b_cont = 0!\n", us->mn);
843 n = *(int *)mp->b_cont->b_rptr;
844 if (n == PPPDBG_DUMP + PPPDBG_DRIVER) {
845 qwriter(q, NULL, debug_dump, PERIM_OUTER);
848 } else if (n == PPPDBG_LOG + PPPDBG_DRIVER) {
849 DPRINT1("ppp/%d: debug log enabled\n", us->mn);
850 us->flags |= US_DBGLOG;
854 if (us->ppa == 0 || us->ppa->lowerq == 0)
856 putnext(us->ppa->lowerq, mp);
862 if (iop->ioc_count != 2 * sizeof(int))
864 if ((us->flags & US_CONTROL) == 0)
866 if (mp->b_cont == 0) {
867 DPRINT1("pppuwput/%d: ioctl PPPIO_NPMODE b_cont = 0!\n", us->mn);
870 sap = ((int *)mp->b_cont->b_rptr)[0];
871 for (nps = us->next; nps != 0; nps = nps->next) {
872 if (us->flags & US_DBGLOG)
873 DPRINT2("us = 0x%x, us->next->sap = 0x%x\n", nps, nps->sap);
878 if (us->flags & US_DBGLOG)
879 DPRINT2("ppp/%d: no stream for sap %x\n", us->mn, sap);
882 /* XXX possibly should use qwriter here */
883 nps->npmode = (enum NPmode) ((int *)mp->b_cont->b_rptr)[1];
884 if (nps->npmode != NPMODE_QUEUE && (nps->flags & US_BLOCKED) != 0)
891 if ((ppa = us->ppa) == 0)
893 mq = allocb(sizeof(struct ppp_idle), BPRI_HI);
902 pip = (struct ppp_idle *) mq->b_wptr;
903 pip->xmit_idle = time - ppa->last_sent;
904 pip->recv_idle = time - ppa->last_recv;
905 mq->b_wptr += sizeof(struct ppp_idle);
906 iop->ioc_count = sizeof(struct ppp_idle);
912 /* Sent from IP down to us. Attach the ifstats structure. */
913 if (iop->ioc_count != sizeof(struct ifreq) || us->ppa == 0)
915 ifr = (struct ifreq *)mp->b_cont->b_rptr;
916 /* Find the unit number in the interface name. */
917 for (i = 0; i < IFNAMSIZ; i++) {
918 if (ifr->ifr_name[i] == 0 ||
919 (ifr->ifr_name[i] >= '0' &&
920 ifr->ifr_name[i] <= '9'))
923 us->ifname[i] = ifr->ifr_name[i];
927 /* Convert the unit number to binary. */
928 for (n = 0; i < IFNAMSIZ; i++) {
929 if (ifr->ifr_name[i] == 0) {
933 n = n * 10 + ifr->ifr_name[i] - '0';
937 /* Verify the ppa. */
938 if (us->ppa->ppa_id != n)
942 /* Set up the netstat block. */
943 strncpy (ppa->ifname, us->ifname, IFNAMSIZ);
945 ppa->ifstats.ifs_name = ppa->ifname;
946 ppa->ifstats.ifs_unit = n;
947 ppa->ifstats.ifs_active = us->state != DL_UNBOUND;
948 ppa->ifstats.ifs_mtu = ppa->mtu;
950 /* Link in statistics used by netstat. */
951 ppa->ifstats.ifs_next = ifstats;
952 ifstats = &ppa->ifstats;
959 if (!(us->flags & US_CONTROL)) {
965 ((struct iocblk_in *)iop)->ioc_ifflags = us->ifflags;
970 if (!(us->flags & US_CONTROL)) {
976 us->ifflags = ((struct iocblk_in *)iop)->ioc_ifflags;
981 if (!(us->flags & US_CONTROL)) {
987 us->ifflags |= IFF_RUNNING;
988 ((struct iocblk_in *)iop)->ioc_ifflags |= IFF_RUNNING;
994 * Vanilla SVR4 systems don't handle SIOCSIFMTU, rather
995 * they take the MTU from the DL_INFO_ACK we sent in response
996 * to their DL_INFO_REQ. Fortunately, they will update the
997 * MTU if we send an unsolicited DL_INFO_ACK up.
999 if ((mq = allocb(sizeof(dl_info_req_t), BPRI_HI)) == 0)
1000 break; /* should do bufcall */
1001 ((union DL_primitives *)mq->b_rptr)->dl_primitive = DL_INFO_REQ;
1002 mq->b_wptr = mq->b_rptr + sizeof(dl_info_req_t);
1003 dlpi_request(q, mq, us);
1007 case SIOCGIFNETMASK:
1008 case SIOCSIFNETMASK:
1010 case SIOCGIFDSTADDR:
1011 case SIOCSIFDSTADDR:
1015 #endif /* LACHTCP */
1018 if (us->ppa == 0 || us->ppa->lowerq == 0)
1020 us->ioc_id = iop->ioc_id;
1022 switch (iop->ioc_cmd) {
1024 case PPPIO_GETCSTAT:
1025 if (us->flags & US_LASTMOD) {
1029 putnext(us->ppa->lowerq, mp);
1032 if (us->flags & US_PRIV)
1033 putnext(us->ppa->lowerq, mp);
1035 DPRINT1("ppp ioctl %x rejected\n", iop->ioc_cmd);
1044 iop->ioc_error = error;
1045 mp->b_datap->db_type = M_IOCNAK;
1047 } else if (error == 0) {
1048 mp->b_datap->db_type = M_IOCACK;
1054 if (us->flags & US_DBGLOG)
1055 DPRINT2("ppp/%d: flush %x\n", us->mn, *mp->b_rptr);
1056 if (*mp->b_rptr & FLUSHW)
1057 flushq(q, FLUSHDATA);
1058 if (*mp->b_rptr & FLUSHR) {
1059 *mp->b_rptr &= ~FLUSHW;
1074 dlpi_request(q, mp, us)
1079 union DL_primitives *d = (union DL_primitives *) mp->b_rptr;
1080 int size = mp->b_wptr - mp->b_rptr;
1082 upperstr_t *ppa, *os;
1084 dl_info_ack_t *info;
1085 dl_bind_ack_t *ackp;
1086 #if DL_CURRENT_VERSION >= 2
1087 dl_phys_addr_ack_t *paddrack;
1088 static struct ether_addr eaddr = {0};
1091 if (us->flags & US_DBGLOG)
1092 DPRINT3("ppp/%d: dlpi prim %x len=%d\n", us->mn,
1093 d->dl_primitive, size);
1094 switch (d->dl_primitive) {
1096 if (size < sizeof(dl_info_req_t))
1098 if ((reply = allocb(sizeof(dl_info_ack_t), BPRI_HI)) == 0)
1099 break; /* should do bufcall */
1100 reply->b_datap->db_type = M_PCPROTO;
1101 info = (dl_info_ack_t *) reply->b_wptr;
1102 reply->b_wptr += sizeof(dl_info_ack_t);
1103 bzero((caddr_t) info, sizeof(dl_info_ack_t));
1104 info->dl_primitive = DL_INFO_ACK;
1105 info->dl_max_sdu = us->ppa? us->ppa->mtu: PPP_MAXMTU;
1106 info->dl_min_sdu = 1;
1107 info->dl_addr_length = sizeof(uint);
1108 info->dl_mac_type = DL_ETHER; /* a bigger lie */
1109 info->dl_current_state = us->state;
1110 info->dl_service_mode = DL_CLDLS;
1111 info->dl_provider_style = DL_STYLE2;
1112 #if DL_CURRENT_VERSION >= 2
1113 info->dl_sap_length = sizeof(uint);
1114 info->dl_version = DL_CURRENT_VERSION;
1120 if (size < sizeof(dl_attach_req_t))
1122 if (us->state != DL_UNATTACHED || us->ppa != 0) {
1123 dlpi_error(q, us, DL_ATTACH_REQ, DL_OUTSTATE, 0);
1126 for (ppa = ppas; ppa != 0; ppa = ppa->nextppa)
1127 if (ppa->ppa_id == d->attach_req.dl_ppa)
1130 dlpi_error(q, us, DL_ATTACH_REQ, DL_BADPPA, 0);
1134 qwriter(q, mp, attach_ppa, PERIM_OUTER);
1138 if (size < sizeof(dl_detach_req_t))
1140 if (us->state != DL_UNBOUND || us->ppa == 0) {
1141 dlpi_error(q, us, DL_DETACH_REQ, DL_OUTSTATE, 0);
1144 qwriter(q, mp, detach_ppa, PERIM_OUTER);
1148 if (size < sizeof(dl_bind_req_t))
1150 if (us->state != DL_UNBOUND || us->ppa == 0) {
1151 dlpi_error(q, us, DL_BIND_REQ, DL_OUTSTATE, 0);
1155 /* apparently this test fails (unnecessarily?) on some systems */
1156 if (d->bind_req.dl_service_mode != DL_CLDLS) {
1157 dlpi_error(q, us, DL_BIND_REQ, DL_UNSUPPORTED, 0);
1162 /* saps must be valid PPP network protocol numbers,
1163 except that we accept ETHERTYPE_IP in place of PPP_IP. */
1164 sap = d->bind_req.dl_sap;
1168 if (us->flags & US_DBGLOG)
1169 DPRINT2("DL_BIND_REQ: ip gives sap = 0x%x, us = 0x%x", sap, us);
1171 if (sap == ETHERTYPE_IP) /* normal IFF_IPV4 */
1173 else if (sap == ETHERTYPE_IPV6) /* when IFF_IPV6 is set */
1175 else if (sap == ETHERTYPE_ALLSAP) /* snoop gives sap of 0 */
1178 DPRINT2("DL_BIND_REQ: unrecognized sap = 0x%x, us = 0x%x", sap, us);
1179 dlpi_error(q, us, DL_BIND_REQ, DL_BADADDR, 0);
1183 if (sap == ETHERTYPE_IP)
1185 if (sap < 0x21 || sap > 0x3fff || (sap & 0x101) != 1) {
1186 dlpi_error(q, us, DL_BIND_REQ, DL_BADADDR, 0);
1189 #endif /* defined(SOL2) */
1191 /* check that no other stream is bound to this sap already. */
1192 for (os = us->ppa; os != 0; os = os->next)
1196 dlpi_error(q, us, DL_BIND_REQ, DL_NOADDR, 0);
1201 us->state = DL_IDLE;
1203 if ((reply = allocb(sizeof(dl_bind_ack_t) + sizeof(uint),
1205 break; /* should do bufcall */
1206 ackp = (dl_bind_ack_t *) reply->b_wptr;
1207 reply->b_wptr += sizeof(dl_bind_ack_t) + sizeof(uint);
1208 reply->b_datap->db_type = M_PCPROTO;
1209 bzero((caddr_t) ackp, sizeof(dl_bind_ack_t));
1210 ackp->dl_primitive = DL_BIND_ACK;
1212 ackp->dl_addr_length = sizeof(uint);
1213 ackp->dl_addr_offset = sizeof(dl_bind_ack_t);
1214 *(uint *)(ackp+1) = sap;
1219 if (size < sizeof(dl_unbind_req_t))
1221 if (us->state != DL_IDLE) {
1222 dlpi_error(q, us, DL_UNBIND_REQ, DL_OUTSTATE, 0);
1226 us->state = DL_UNBOUND;
1228 us->ppa->ifstats.ifs_active = 0;
1230 dlpi_ok(q, DL_UNBIND_REQ);
1233 case DL_UNITDATA_REQ:
1234 if (size < sizeof(dl_unitdata_req_t))
1236 if (us->state != DL_IDLE) {
1237 dlpi_error(q, us, DL_UNITDATA_REQ, DL_OUTSTATE, 0);
1240 if ((ppa = us->ppa) == 0) {
1241 cmn_err(CE_CONT, "ppp: in state dl_idle but ppa == 0?\n");
1244 len = mp->b_cont == 0? 0: msgdsize(mp->b_cont);
1245 if (len > ppa->mtu) {
1246 DPRINT2("dlpi data too large (%d > %d)\n", len, ppa->mtu);
1252 * Should there be any promiscuous stream(s), send the data
1253 * up for each promiscuous stream that we recognize.
1256 promisc_sendup(ppa, mp->b_cont, us->sap, 0);
1257 #endif /* defined(SOL2) */
1261 /* Extract s_port & d_port from IP-packet, the code is a bit
1262 dirty here, but so am I, too... */
1263 if (mp->b_datap->db_type == M_PROTO && us->sap == PPP_IP
1264 && mp->b_cont != 0) {
1268 u_char band_unset, cur_band, syn;
1269 u_short s_port, d_port;
1271 bb = mp->b_cont->b_rptr; /* bb points to IP-header*/
1272 len = mp->b_cont->b_wptr - mp->b_cont->b_rptr;
1274 s_port = IPPORT_DEFAULT;
1275 d_port = IPPORT_DEFAULT;
1276 if (len >= 20) { /* 20 = minimum length of IP header */
1277 iphlen = (bb[0] & 0x0f) * 4;
1282 if (len >= 20) { /* min length of TCP header */
1283 s_port = (tlh[0] << 8) + tlh[1];
1284 d_port = (tlh[2] << 8) + tlh[3];
1285 syn = tlh[13] & 0x02;
1289 if (len >= 8) { /* min length of UDP header */
1290 s_port = (tlh[0] << 8) + tlh[1];
1291 d_port = (tlh[2] << 8) + tlh[3];
1298 * Now calculate b_band for this packet from the
1299 * port-priority table.
1302 cur_band = max_band;
1305 while (*ptr && band_unset)
1306 if (s_port == *ptr || d_port == *ptr++) {
1307 mp->b_band = cur_band;
1315 mp->b_band = def_band;
1316 /* It may be usable to urge SYN packets a bit */
1321 /* this assumes PPP_HDRLEN <= sizeof(dl_unitdata_req_t) */
1322 if (mp->b_datap->db_ref > 1) {
1323 np = allocb(PPP_HDRLEN, BPRI_HI);
1326 np->b_cont = mp->b_cont;
1331 mp->b_datap->db_type = M_DATA;
1332 /* XXX should use dl_dest_addr_offset/length here,
1333 but we would have to translate ETHERTYPE_IP -> PPP_IP */
1334 mp->b_wptr = mp->b_rptr + PPP_HDRLEN;
1335 mp->b_rptr[0] = PPP_ALLSTATIONS;
1336 mp->b_rptr[1] = PPP_UI;
1337 mp->b_rptr[2] = us->sap >> 8;
1338 mp->b_rptr[3] = us->sap;
1339 if (pass_packet(us, mp, 1)) {
1340 if (!send_data(mp, us))
1345 #if DL_CURRENT_VERSION >= 2
1346 case DL_PHYS_ADDR_REQ:
1347 if (size < sizeof(dl_phys_addr_req_t))
1351 * Don't check state because ifconfig sends this one down too
1354 if ((reply = allocb(sizeof(dl_phys_addr_ack_t)+ETHERADDRL,
1356 break; /* should do bufcall */
1357 reply->b_datap->db_type = M_PCPROTO;
1358 paddrack = (dl_phys_addr_ack_t *) reply->b_wptr;
1359 reply->b_wptr += sizeof(dl_phys_addr_ack_t);
1360 bzero((caddr_t) paddrack, sizeof(dl_phys_addr_ack_t)+ETHERADDRL);
1361 paddrack->dl_primitive = DL_PHYS_ADDR_ACK;
1362 paddrack->dl_addr_length = ETHERADDRL;
1363 paddrack->dl_addr_offset = sizeof(dl_phys_addr_ack_t);
1364 bcopy(&eaddr, reply->b_wptr, ETHERADDRL);
1365 reply->b_wptr += ETHERADDRL;
1370 case DL_PROMISCON_REQ:
1371 if (size < sizeof(dl_promiscon_req_t))
1373 us->flags |= US_PROMISC;
1374 dlpi_ok(q, DL_PROMISCON_REQ);
1377 case DL_PROMISCOFF_REQ:
1378 if (size < sizeof(dl_promiscoff_req_t))
1380 us->flags &= ~US_PROMISC;
1381 dlpi_ok(q, DL_PROMISCOFF_REQ);
1384 case DL_PROMISCON_REQ: /* fall thru */
1385 case DL_PROMISCOFF_REQ: /* fall thru */
1386 #endif /* defined(SOL2) */
1387 #endif /* DL_CURRENT_VERSION >= 2 */
1389 #if DL_CURRENT_VERSION >= 2
1390 case DL_SET_PHYS_ADDR_REQ:
1391 case DL_SUBS_BIND_REQ:
1392 case DL_SUBS_UNBIND_REQ:
1393 case DL_ENABMULTI_REQ:
1394 case DL_DISABMULTI_REQ:
1397 case DL_REPLY_UPDATE_REQ:
1399 case DL_DATA_ACK_REQ:
1401 case DL_CONNECT_REQ:
1403 dlpi_error(q, us, d->dl_primitive, DL_NOTSUPPORTED, 0);
1406 case DL_CONNECT_RES:
1407 case DL_DISCONNECT_REQ:
1410 dlpi_error(q, us, d->dl_primitive, DL_OUTSTATE, 0);
1414 dlpi_error(q, us, d->dl_primitive, DL_BADQOSTYPE, 0);
1417 #if DL_CURRENT_VERSION >= 2
1424 cmn_err(CE_CONT, "ppp: unknown dlpi prim 0x%x\n", d->dl_primitive);
1427 dlpi_error(q, us, d->dl_primitive, DL_BADPRIM, 0);
1434 dlpi_error(q, us, prim, err, uerr)
1437 int prim, err, uerr;
1440 dl_error_ack_t *errp;
1442 if (us->flags & US_DBGLOG)
1443 DPRINT3("ppp/%d: dlpi error, prim=%x, err=%x\n", us->mn, prim, err);
1444 reply = allocb(sizeof(dl_error_ack_t), BPRI_HI);
1446 return; /* XXX should do bufcall */
1447 reply->b_datap->db_type = M_PCPROTO;
1448 errp = (dl_error_ack_t *) reply->b_wptr;
1449 reply->b_wptr += sizeof(dl_error_ack_t);
1450 errp->dl_primitive = DL_ERROR_ACK;
1451 errp->dl_error_primitive = prim;
1452 errp->dl_errno = err;
1453 errp->dl_unix_errno = uerr;
1465 reply = allocb(sizeof(dl_ok_ack_t), BPRI_HI);
1467 return; /* XXX should do bufcall */
1468 reply->b_datap->db_type = M_PCPROTO;
1469 okp = (dl_ok_ack_t *) reply->b_wptr;
1470 reply->b_wptr += sizeof(dl_ok_ack_t);
1471 okp->dl_primitive = DL_OK_ACK;
1472 okp->dl_correct_primitive = prim;
1475 #endif /* NO_DLPI */
1478 pass_packet(us, mp, outbound)
1486 if ((ppa = us->ppa) == 0) {
1491 #ifdef FILTER_PACKETS
1492 pass = ip_hard_filter(us, mp, outbound);
1495 * Here is where we might, in future, decide whether to pass
1496 * or drop the packet, and whether it counts as link activity.
1499 #endif /* FILTER_PACKETS */
1502 /* pass only if link already up, and don't update time */
1503 if (ppa->lowerq == 0) {
1510 ppa->last_sent = time;
1512 ppa->last_recv = time;
1519 * We have some data to send down to the lower stream (or up the
1520 * control stream, if we don't have a lower stream attached).
1521 * Returns 1 if the message was dealt with, 0 if it wasn't able
1522 * to be sent on and should therefore be queued up.
1531 if ((us->flags & US_BLOCKED) || us->npmode == NPMODE_QUEUE)
1534 if (ppa == 0 || us->npmode == NPMODE_DROP || us->npmode == NPMODE_ERROR) {
1535 if (us->flags & US_DBGLOG)
1536 DPRINT2("ppp/%d: dropping pkt (npmode=%d)\n", us->mn, us->npmode);
1540 if (ppa->lowerq == 0) {
1541 /* try to send it up the control stream */
1542 if (bcanputnext(ppa->q, mp->b_band)) {
1544 * The message seems to get corrupted for some reason if
1545 * we just send the message up as it is, so we send a copy.
1547 mblk_t *np = copymsg(mp);
1550 putnext(ppa->q, np);
1554 if (bcanputnext(ppa->lowerq, mp->b_band)) {
1555 MT_ENTER(&ppa->stats_lock);
1556 ppa->stats.ppp_opackets++;
1557 ppa->stats.ppp_obytes += msgdsize(mp);
1558 #ifdef INCR_OPACKETS
1561 MT_EXIT(&ppa->stats_lock);
1563 * The lower queue is only ever detached while holding an
1564 * exclusive lock on the whole driver. So we can be confident
1565 * that the lower queue is still there.
1567 putnext(ppa->lowerq, mp);
1571 us->flags |= US_BLOCKED;
1576 * Allocate a new PPA id and link this stream into the list of PPAs.
1577 * This procedure is called with an exclusive lock on all queues in
1585 upperstr_t *us, *up, **usp;
1588 us = (upperstr_t *) q->q_ptr;
1590 DPRINT("new_ppa: q_ptr = 0!\n");
1596 while ((up = *usp) != 0 && ppa_id == up->ppa_id) {
1600 us->ppa_id = ppa_id;
1605 us->flags |= US_CONTROL;
1606 us->npmode = NPMODE_PASS;
1613 * Create a kstats record for our statistics, so netstat -i works.
1615 if (us->kstats == 0) {
1618 sprintf(unit, "ppp%d", us->ppa->ppa_id);
1619 us->kstats = kstat_create("ppp", us->ppa->ppa_id, unit,
1620 "net", KSTAT_TYPE_NAMED, 4, 0);
1621 if (us->kstats != 0) {
1622 kstat_named_t *kn = KSTAT_NAMED_PTR(us->kstats);
1624 strcpy(kn[0].name, "ipackets");
1625 kn[0].data_type = KSTAT_DATA_ULONG;
1626 strcpy(kn[1].name, "ierrors");
1627 kn[1].data_type = KSTAT_DATA_ULONG;
1628 strcpy(kn[2].name, "opackets");
1629 kn[2].data_type = KSTAT_DATA_ULONG;
1630 strcpy(kn[3].name, "oerrors");
1631 kn[3].data_type = KSTAT_DATA_ULONG;
1632 kstat_install(us->kstats);
1637 *(int *)mp->b_cont->b_rptr = ppa_id;
1638 mp->b_datap->db_type = M_IOCACK;
1649 us = (upperstr_t *) q->q_ptr;
1651 DPRINT("attach_ppa: q_ptr = 0!\n");
1656 us->state = DL_UNBOUND;
1658 for (t = us->ppa; t->next != 0; t = t->next)
1662 if (mp->b_datap->db_type == M_IOCTL) {
1663 mp->b_datap->db_type = M_IOCACK;
1667 dlpi_ok(q, DL_ATTACH_REQ);
1679 us = (upperstr_t *) q->q_ptr;
1681 DPRINT("detach_ppa: q_ptr = 0!\n");
1685 for (t = us->ppa; t->next != 0; t = t->next)
1686 if (t->next == us) {
1693 us->state = DL_UNATTACHED;
1694 dlpi_ok(q, DL_DETACH_REQ);
1699 * We call this with qwriter in order to give the upper queue procedures
1700 * the guarantee that the lower queue is not going to go away while
1701 * they are executing.
1710 us = (upperstr_t *) q->q_ptr;
1712 DPRINT("detach_lower: q_ptr = 0!\n");
1717 us->lowerq->q_ptr = 0;
1718 RD(us->lowerq)->q_ptr = 0;
1722 /* Unblock streams which now feed back up the control stream. */
1725 mp->b_datap->db_type = M_IOCACK;
1733 upperstr_t *us, *as;
1736 us = (upperstr_t *) q->q_ptr;
1738 DPRINT("pppuwsrv: q_ptr = 0!\n");
1743 * If this is a control stream, then this service procedure
1744 * probably got enabled because of flow control in the lower
1745 * stream being enabled (or because of the lower stream going
1746 * away). Therefore we enable the service procedure of all
1747 * attached upper streams.
1749 if (us->flags & US_CONTROL) {
1750 for (as = us->next; as != 0; as = as->next)
1754 /* Try to send on any data queued here. */
1755 us->flags &= ~US_BLOCKED;
1756 while ((mp = getq(q)) != 0) {
1757 if (!send_data(mp, us)) {
1766 /* should never get called... */
1783 * Flow control has back-enabled this stream:
1784 * enable the upper write service procedure for
1785 * the upper control stream for this lower stream.
1788 uq = (queue_t *) q->q_ptr;
1796 * This should only get called for control streams.
1803 upperstr_t *ppa, *us;
1807 ppa = (upperstr_t *) q->q_ptr;
1809 DPRINT("pppurput: q_ptr = 0!\n");
1813 switch (mp->b_datap->db_type) {
1815 MT_ENTER(&ppa->stats_lock);
1816 switch (*mp->b_rptr) {
1821 ppa->stats.ppp_ierrors++;
1827 ppa->stats.ppp_oerrors++;
1830 MT_EXIT(&ppa->stats_lock);
1837 * Attempt to match up the response with the stream
1838 * that the request came from.
1840 iop = (struct iocblk *) mp->b_rptr;
1841 for (us = ppa; us != 0; us = us->next)
1842 if (us->ioc_id == iop->ioc_id)
1852 * The serial device has hung up. We don't want to send
1853 * the M_HANGUP message up to pppd because that will stop
1854 * us from using the control stream any more. Instead we
1855 * send a zero-length message as an end-of-file indication.
1858 mp = allocb(1, BPRI_HI);
1860 DPRINT1("ppp/%d: couldn't allocate eof message!\n", ppa->mn);
1863 putnext(ppa->q, mp);
1867 if (mp->b_datap->db_type == M_DATA) {
1869 if (mp->b_wptr - mp->b_rptr < PPP_HDRLEN) {
1870 PULLUP(mp, PPP_HDRLEN);
1872 DPRINT1("ppp_urput: msgpullup failed (len=%d)\n", len);
1876 MT_ENTER(&ppa->stats_lock);
1877 ppa->stats.ppp_ipackets++;
1878 ppa->stats.ppp_ibytes += len;
1879 #ifdef INCR_IPACKETS
1882 MT_EXIT(&ppa->stats_lock);
1884 proto = PPP_PROTOCOL(mp->b_rptr);
1888 * Should there be any promiscuous stream(s), send the data
1889 * up for each promiscuous stream that we recognize.
1891 promisc_sendup(ppa, mp, proto, 1);
1892 #endif /* defined(SOL2) */
1894 if (proto < 0x8000 && (us = find_dest(ppa, proto)) != 0) {
1896 * A data packet for some network protocol.
1897 * Queue it on the upper stream for that protocol.
1898 * XXX could we just putnext it? (would require thought)
1899 * The rblocked flag is there to ensure that we keep
1900 * messages in order for each network protocol.
1902 if (!pass_packet(us, mp, 0))
1904 if (!us->rblocked && !canput(us->q))
1914 * A control frame, a frame for an unknown protocol,
1915 * or some other message type.
1916 * Send it up to pppd via the control stream.
1918 if (queclass(mp) == QPCTL || canputnext(ppa->q))
1919 putnext(ppa->q, mp);
1932 upperstr_t *us, *as;
1935 dl_unitdata_ind_t *ud;
1939 us = (upperstr_t *) q->q_ptr;
1941 DPRINT("pppursrv: q_ptr = 0!\n");
1945 if (us->flags & US_CONTROL) {
1948 * If there is no lower queue attached, run the write service
1949 * routines of other upper streams attached to this PPA.
1951 if (us->lowerq == 0) {
1954 if (as->flags & US_BLOCKED)
1961 * Messages get queued on this stream's read queue if they
1962 * can't be queued on the read queue of the attached stream
1963 * that they are destined for. This is for flow control -
1964 * when this queue fills up, the lower read put procedure will
1965 * queue messages there and the flow control will propagate
1968 while ((mp = getq(q)) != 0) {
1969 proto = PPP_PROTOCOL(mp->b_rptr);
1970 if (proto < 0x8000 && (as = find_dest(us, proto)) != 0) {
1983 /* can now put stuff directly on network protocol streams again */
1984 for (as = us->next; as != 0; as = as->next)
1989 * If this stream has a lower stream attached,
1990 * enable the read queue's service routine.
1991 * XXX we should really only do this if the queue length
1992 * has dropped below the low-water mark.
1994 if (us->lowerq != 0)
1995 qenable(RD(us->lowerq));
1999 * A network protocol stream. Put a DLPI header on each
2000 * packet and send it on.
2001 * (Actually, it seems that the IP module will happily
2002 * accept M_DATA messages without the DL_UNITDATA_IND header.)
2004 while ((mp = getq(q)) != 0) {
2005 if (!canputnext(q)) {
2010 proto = PPP_PROTOCOL(mp->b_rptr);
2011 mp->b_rptr += PPP_HDRLEN;
2012 hdr = allocb(sizeof(dl_unitdata_ind_t) + 2 * sizeof(uint),
2015 /* XXX should put it back and use bufcall */
2019 hdr->b_datap->db_type = M_PROTO;
2020 ud = (dl_unitdata_ind_t *) hdr->b_wptr;
2021 hdr->b_wptr += sizeof(dl_unitdata_ind_t) + 2 * sizeof(uint);
2023 ud->dl_primitive = DL_UNITDATA_IND;
2024 ud->dl_dest_addr_length = sizeof(uint);
2025 ud->dl_dest_addr_offset = sizeof(dl_unitdata_ind_t);
2026 ud->dl_src_addr_length = sizeof(uint);
2027 ud->dl_src_addr_offset = ud->dl_dest_addr_offset + sizeof(uint);
2028 #if DL_CURRENT_VERSION >= 2
2029 ud->dl_group_address = 0;
2031 /* Send the DLPI client the data with the SAP they requested,
2032 (e.g. ETHERTYPE_IP) rather than the PPP protocol number
2034 ((uint *)(ud + 1))[0] = us->req_sap; /* dest SAP */
2035 ((uint *)(ud + 1))[1] = us->req_sap; /* src SAP */
2039 #endif /* NO_DLPI */
2042 * Now that we have consumed some packets from this queue,
2043 * enable the control stream's read service routine so that we
2044 * can process any packets for us that might have got queued
2045 * there for flow control reasons.
2048 qenable(us->ppa->q);
2055 find_dest(ppa, proto)
2061 for (us = ppa->next; us != 0; us = us->next)
2062 if (proto == us->sap)
2069 * Test upstream promiscuous conditions. As of now, only pass IPv4 and
2070 * Ipv6 packets upstream (let PPP packets be decoded elsewhere).
2073 find_promisc(us, proto)
2078 if ((proto != PPP_IP) && (proto != PPP_IPV6))
2079 return (upperstr_t *)0;
2081 for ( ; us; us = us->next) {
2082 if ((us->flags & US_PROMISC) && (us->state == DL_IDLE))
2086 return (upperstr_t *)0;
2090 * Prepend an empty Ethernet header to msg for snoop, et al.
2093 prepend_ether(us, mp, proto)
2101 if ((eh = allocb(sizeof(struct ether_header), BPRI_HI)) == 0) {
2106 if (proto == PPP_IP)
2107 type = ETHERTYPE_IP;
2108 else if (proto == PPP_IPV6)
2109 type = ETHERTYPE_IPV6;
2111 type = proto; /* What else? Let decoder decide */
2113 eh->b_wptr += sizeof(struct ether_header);
2114 bzero((caddr_t)eh->b_rptr, sizeof(struct ether_header));
2115 ((struct ether_header *)eh->b_rptr)->ether_type = htons((short)type);
2121 * Prepend DL_UNITDATA_IND mblk to msg
2124 prepend_udind(us, mp, proto)
2129 dl_unitdata_ind_t *dlu;
2133 size = sizeof(dl_unitdata_ind_t);
2134 if ((dh = allocb(size, BPRI_MED)) == 0) {
2139 dh->b_datap->db_type = M_PROTO;
2140 dh->b_wptr = dh->b_datap->db_lim;
2141 dh->b_rptr = dh->b_wptr - size;
2143 dlu = (dl_unitdata_ind_t *)dh->b_rptr;
2144 dlu->dl_primitive = DL_UNITDATA_IND;
2145 dlu->dl_dest_addr_length = 0;
2146 dlu->dl_dest_addr_offset = sizeof(dl_unitdata_ind_t);
2147 dlu->dl_src_addr_length = 0;
2148 dlu->dl_src_addr_offset = sizeof(dl_unitdata_ind_t);
2149 dlu->dl_group_address = 0;
2156 * For any recognized promiscuous streams, send data upstream
2159 promisc_sendup(ppa, mp, proto, skip)
2164 mblk_t *dup_mp, *dup_dup_mp;
2165 upperstr_t *prus, *nprus;
2167 if ((prus = find_promisc(ppa, proto)) != 0) {
2168 if (dup_mp = dupmsg(mp)) {
2171 dup_mp->b_rptr += PPP_HDRLEN;
2173 for ( ; nprus = find_promisc(prus->next, proto);
2176 if (dup_dup_mp = dupmsg(dup_mp)) {
2177 if (canputnext(prus->q)) {
2178 if (prus->flags & US_RAWDATA) {
2179 dup_dup_mp = prepend_ether(prus, dup_dup_mp, proto);
2180 putnext(prus->q, dup_dup_mp);
2182 dup_dup_mp = prepend_udind(prus, dup_dup_mp, proto);
2183 putnext(prus->q, dup_dup_mp);
2186 DPRINT("ppp_urput: data to promisc q dropped\n");
2187 freemsg(dup_dup_mp);
2192 if (canputnext(prus->q)) {
2193 if (prus->flags & US_RAWDATA) {
2194 dup_mp = prepend_ether(prus, dup_mp, proto);
2195 putnext(prus->q, dup_mp);
2197 dup_mp = prepend_udind(prus, dup_mp, proto);
2198 putnext(prus->q, dup_mp);
2201 DPRINT("ppp_urput: data to promisc q dropped\n");
2207 #endif /* defined(SOL2) */
2210 * We simply put the message on to the associated upper control stream
2211 * (either here or in ppplrsrv). That way we enter the perimeters
2212 * before looking through the list of attached streams to decide which
2213 * stream it should go up.
2223 switch (mp->b_datap->db_type) {
2225 iop = (struct iocblk *) mp->b_rptr;
2226 iop->ioc_error = EINVAL;
2227 mp->b_datap->db_type = M_IOCNAK;
2231 if (*mp->b_rptr & FLUSHR)
2232 flushq(q, FLUSHDATA);
2233 if (*mp->b_rptr & FLUSHW) {
2234 *mp->b_rptr &= ~FLUSHR;
2242 * If we can't get the lower lock straight away, queue this one
2243 * rather than blocking, to avoid the possibility of deadlock.
2245 if (!TRYLOCK_LOWER_R) {
2251 * Check that we're still connected to the driver.
2253 uq = (queue_t *) q->q_ptr;
2256 DPRINT1("ppplrput: q = %x, uq = 0??\n", q);
2262 * Try to forward the message to the put routine for the upper
2263 * control stream for this lower stream.
2264 * If there are already messages queued here, queue this one so
2265 * they don't get out of order.
2267 if (queclass(mp) == QPCTL || (qsize(q) == 0 && canput(uq)))
2284 * Packets get queued here for flow control reasons
2285 * or if the lrput routine couldn't get the lower lock
2289 uq = (queue_t *) q->q_ptr;
2292 flushq(q, FLUSHALL);
2293 DPRINT1("ppplrsrv: q = %x, uq = 0??\n", q);
2296 while ((mp = getq(q)) != 0) {
2297 if (queclass(mp) == QPCTL || canput(uq))
2309 putctl2(q, type, code, val)
2311 int type, code, val;
2315 mp = allocb(2, BPRI_HI);
2318 mp->b_datap->db_type = type;
2319 mp->b_wptr[0] = code;
2320 mp->b_wptr[1] = val;
2327 putctl4(q, type, code, val)
2329 int type, code, val;
2333 mp = allocb(4, BPRI_HI);
2336 mp->b_datap->db_type = type;
2337 mp->b_wptr[0] = code;
2338 ((short *)mp->b_wptr)[1] = val;
2352 DPRINT("ppp upper streams:\n");
2353 for (us = minor_devs; us != 0; us = us->nextmn) {
2355 DPRINT3(" %d: q=%x rlev=%d",
2356 us->mn, uq, (uq? qsize(uq): 0));
2357 DPRINT3(" wlev=%d flags=0x%b", (uq? qsize(WR(uq)): 0),
2358 us->flags, "\020\1priv\2control\3blocked\4last");
2359 DPRINT3(" state=%x sap=%x req_sap=%x", us->state, us->sap,
2364 DPRINT1(" ppa=%d\n", us->ppa->ppa_id);
2365 if (us->flags & US_CONTROL) {
2367 DPRINT3(" control for %d lq=%x rlev=%d",
2368 us->ppa_id, lq, (lq? qsize(RD(lq)): 0));
2369 DPRINT3(" wlev=%d mru=%d mtu=%d\n",
2370 (lq? qsize(lq): 0), us->mru, us->mtu);
2373 mp->b_datap->db_type = M_IOCACK;
2377 #ifdef FILTER_PACKETS
2378 #include <netinet/in_systm.h>
2379 #include <netinet/ip.h>
2380 #include <netinet/udp.h>
2381 #include <netinet/tcp.h>
2383 #define MAX_IPHDR 128 /* max TCP/IP header size */
2386 /* The following table contains a hard-coded list of protocol/port pairs.
2387 * Any matching packets are either discarded unconditionally, or,
2388 * if ok_if_link_up is non-zero when a connection does not currently exist
2389 * (i.e., they go through if the connection is present, but never initiate
2391 * This idea came from a post by dm@garage.uun.org (David Mazieres)
2393 static struct pktfilt_tab {
2396 u_short ok_if_link_up;
2398 { IPPROTO_UDP, 520, 1 }, /* RIP, ok to pass if link is up */
2399 { IPPROTO_UDP, 123, 1 }, /* NTP, don't keep up the link for it */
2400 { -1, 0, 0 } /* terminator entry has port == -1 */
2405 ip_hard_filter(us, mp, outbound)
2411 struct pktfilt_tab *pft;
2417 /* Note, the PPP header has already been pulled up in all cases */
2418 proto = PPP_PROTOCOL(mp->b_rptr);
2419 if (us->flags & US_DBGLOG)
2420 DPRINT3("ppp/%d: filter, proto=0x%x, out=%d\n", us->mn, proto, outbound);
2425 if ((mp->b_wptr - mp->b_rptr) == PPP_HDRLEN && mp->b_cont != 0) {
2426 temp_mp = mp->b_cont;
2427 len = msgdsize(temp_mp);
2428 hlen = (len < MAX_IPHDR) ? len : MAX_IPHDR;
2429 PULLUP(temp_mp, hlen);
2431 DPRINT2("ppp/%d: filter, pullup next failed, len=%d\n",
2433 mp->b_cont = 0; /* PULLUP() freed the rest */
2437 ip = (struct ip *)mp->b_cont->b_rptr;
2441 hlen = (len < (PPP_HDRLEN+MAX_IPHDR)) ? len : (PPP_HDRLEN+MAX_IPHDR);
2444 DPRINT2("ppp/%d: filter, pullup failed, len=%d\n",
2448 ip = (struct ip *)(mp->b_rptr + PPP_HDRLEN);
2451 /* For IP traffic, certain packets (e.g., RIP) may be either
2452 * 1. ignored - dropped completely
2453 * 2. will not initiate a connection, but
2454 * will be passed if a connection is currently up.
2456 for (pft=pktfilt_tab; pft->proto != -1; pft++) {
2457 if (ip->ip_p == pft->proto) {
2458 switch(pft->proto) {
2460 if (((struct udphdr *) &((int *)ip)[ip->ip_hl])->uh_dport
2461 == htons(pft->port)) goto endfor;
2464 if (((struct tcphdr *) &((int *)ip)[ip->ip_hl])->th_dport
2465 == htons(pft->port)) goto endfor;
2471 if (pft->proto != -1) {
2472 if (us->flags & US_DBGLOG)
2473 DPRINT3("ppp/%d: found IP pkt, proto=0x%x (%d)\n",
2474 us->mn, pft->proto, pft->port);
2475 /* Discard if not connected, or if not pass_with_link_up */
2476 /* else, if link is up let go by, but don't update time */
2477 return pft->ok_if_link_up? -1: 0;
2480 } /* end switch (proto) */
2484 #endif /* FILTER_PACKETS */