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 1.23 1999/09/30 19:54:44 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_IP6) && defined(SOL2)
93 #define ETHERTYPE_IP6 0x86dd
94 #endif /* !defined(ETHERTYPE_IP6) && defined(SOL2) */
100 * We use this reader-writer lock to ensure that the lower streams
101 * stay connected to the upper streams while the lower-side put and
102 * service procedures are running. Essentially it is an existence
103 * lock for the upper stream associated with each lower stream.
105 krwlock_t ppp_lower_lock;
106 #define LOCK_LOWER_W rw_enter(&ppp_lower_lock, RW_WRITER)
107 #define LOCK_LOWER_R rw_enter(&ppp_lower_lock, RW_READER)
108 #define TRYLOCK_LOWER_R rw_tryenter(&ppp_lower_lock, RW_READER)
109 #define UNLOCK_LOWER rw_exit(&ppp_lower_lock)
111 #define MT_ENTER(x) mutex_enter(x)
112 #define MT_EXIT(x) mutex_exit(x)
115 * Notes on multithreaded implementation for Solaris 2:
117 * We use an inner perimeter around each queue pair and an outer
118 * perimeter around the whole driver. The inner perimeter is
119 * entered exclusively for all entry points (open, close, put,
120 * service). The outer perimeter is entered exclusively for open
121 * and close and shared for put and service. This is all done for
122 * us by the streams framework.
124 * I used to think that the perimeters were entered for the lower
125 * streams' put and service routines as well as for the upper streams'.
126 * Because of problems experienced by people, and after reading the
127 * documentation more closely, I now don't think that is true. So we
128 * now use ppp_lower_lock to give us an existence guarantee on the
129 * upper stream controlling each lower stream.
131 * Shared entry to the outer perimeter protects the existence of all
132 * the upper streams and their upperstr_t structures, and guarantees
133 * that the following fields of any upperstr_t won't change:
134 * nextmn, next, nextppa. It guarantees that the lowerq field of an
135 * upperstr_t won't go from non-zero to zero, that the global `ppas'
136 * won't change and that the no lower stream will get unlinked.
138 * Shared (reader) access to ppa_lower_lock guarantees that no lower
139 * stream will be unlinked and that the lowerq field of all upperstr_t
140 * structures won't change.
144 #define LOCK_LOWER_W 0
145 #define LOCK_LOWER_R 0
146 #define TRYLOCK_LOWER_R 1
147 #define UNLOCK_LOWER 0
148 #define MT_ENTER(x) 0
154 * Private information; one per upper stream.
156 typedef struct upperstr {
157 minor_t mn; /* minor device number */
158 struct upperstr *nextmn; /* next minor device */
159 queue_t *q; /* read q associated with this upper stream */
160 int flags; /* flag bits, see below */
161 int state; /* current DLPI state */
162 int sap; /* service access point */
163 int req_sap; /* which SAP the DLPI client requested */
164 struct upperstr *ppa; /* control stream for our ppa */
165 struct upperstr *next; /* next stream for this ppa */
166 uint ioc_id; /* last ioctl ID for this stream */
167 enum NPmode npmode; /* what to do with packets on this SAP */
168 unsigned char rblocked; /* flow control has blocked upper read strm */
169 /* N.B. rblocked is only changed by control stream's put/srv procs */
171 * There is exactly one control stream for each PPA.
172 * The following fields are only used for control streams.
175 queue_t *lowerq; /* write queue attached below this PPA */
176 struct upperstr *nextppa; /* next control stream */
179 struct pppstat stats; /* statistics */
180 time_t last_sent; /* time last NP packet sent */
181 time_t last_recv; /* time last NP packet rcvd */
183 kmutex_t stats_lock; /* lock for stats updates */
184 kstat_t *kstats; /* stats for netstat */
188 char ifname[IFNAMSIZ];
189 struct ifstats ifstats;
193 /* Values for flags */
194 #define US_PRIV 1 /* stream was opened by superuser */
195 #define US_CONTROL 2 /* stream is a control stream */
196 #define US_BLOCKED 4 /* flow ctrl has blocked lower write stream */
197 #define US_LASTMOD 8 /* no PPP modules below us */
198 #define US_DBGLOG 0x10 /* log various occurrences */
199 #define US_RBLOCKED 0x20 /* flow ctrl has blocked upper read stream */
203 static u_char max_band=0;
204 static u_char def_band=0;
206 #define IPPORT_DEFAULT 65535
209 * Port priority table
210 * Highest priority ports are listed first, lowest are listed last.
211 * ICMP & packets using unlisted ports will be treated as "default".
212 * If IPPORT_DEFAULT is not listed here, "default" packets will be
213 * assigned lowest priority.
214 * Each line should be terminated with "0".
215 * Line containing only "0" marks the end of the list.
218 static u_short prioq_table[]= {
220 22, 23, 513, 517, 518, 0,
224 20, 70, 80, 8001, 8008, 8080, 0, /* 8001,8008,8080 - common proxy ports */
230 static upperstr_t *minor_devs = NULL;
231 static upperstr_t *ppas = NULL;
234 static int pppopen __P((queue_t *, dev_t *, int, int, cred_t *));
235 static int pppclose __P((queue_t *, int, cred_t *));
237 static int pppopen __P((queue_t *, int, int, int));
238 static int pppclose __P((queue_t *, int));
240 static int pppurput __P((queue_t *, mblk_t *));
241 static int pppuwput __P((queue_t *, mblk_t *));
242 static int pppursrv __P((queue_t *));
243 static int pppuwsrv __P((queue_t *));
244 static int ppplrput __P((queue_t *, mblk_t *));
245 static int ppplwput __P((queue_t *, mblk_t *));
246 static int ppplrsrv __P((queue_t *));
247 static int ppplwsrv __P((queue_t *));
249 static void dlpi_request __P((queue_t *, mblk_t *, upperstr_t *));
250 static void dlpi_error __P((queue_t *, upperstr_t *, int, int, int));
251 static void dlpi_ok __P((queue_t *, int));
253 static int send_data __P((mblk_t *, upperstr_t *));
254 static void new_ppa __P((queue_t *, mblk_t *));
255 static void attach_ppa __P((queue_t *, mblk_t *));
256 static void detach_ppa __P((queue_t *, mblk_t *));
257 static void detach_lower __P((queue_t *, mblk_t *));
258 static void debug_dump __P((queue_t *, mblk_t *));
259 static upperstr_t *find_dest __P((upperstr_t *, int));
260 static int putctl2 __P((queue_t *, int, int, int));
261 static int putctl4 __P((queue_t *, int, int, int));
262 static int pass_packet __P((upperstr_t *ppa, mblk_t *mp, int outbound));
263 #ifdef FILTER_PACKETS
264 static int ip_hard_filter __P((upperstr_t *ppa, mblk_t *mp, int outbound));
265 #endif /* FILTER_PACKETS */
267 #define PPP_ID 0xb1a6
268 static struct module_info ppp_info = {
270 PPP_ID, "ppp", 0, 512, 512, 384
272 PPP_ID, "ppp", 0, 512, 512, 128
276 static struct qinit pppurint = {
277 pppurput, pppursrv, pppopen, pppclose, NULL, &ppp_info, NULL
280 static struct qinit pppuwint = {
281 pppuwput, pppuwsrv, NULL, NULL, NULL, &ppp_info, NULL
284 static struct qinit ppplrint = {
285 ppplrput, ppplrsrv, NULL, NULL, NULL, &ppp_info, NULL
288 static struct qinit ppplwint = {
289 ppplwput, ppplwsrv, NULL, NULL, NULL, &ppp_info, NULL
293 extern struct ifstats *ifstats;
297 struct streamtab pppinfo = {
298 &pppurint, &pppuwint,
305 * How we maintain statistics.
308 #define INCR_IPACKETS(ppa) \
309 if (ppa->kstats != 0) { \
310 KSTAT_NAMED_PTR(ppa->kstats)[0].value.ul++; \
312 #define INCR_IERRORS(ppa) \
313 if (ppa->kstats != 0) { \
314 KSTAT_NAMED_PTR(ppa->kstats)[1].value.ul++; \
316 #define INCR_OPACKETS(ppa) \
317 if (ppa->kstats != 0) { \
318 KSTAT_NAMED_PTR(ppa->kstats)[2].value.ul++; \
320 #define INCR_OERRORS(ppa) \
321 if (ppa->kstats != 0) { \
322 KSTAT_NAMED_PTR(ppa->kstats)[3].value.ul++; \
327 #define INCR_IPACKETS(ppa) ppa->ifstats.ifs_ipackets++;
328 #define INCR_IERRORS(ppa) ppa->ifstats.ifs_ierrors++;
329 #define INCR_OPACKETS(ppa) ppa->ifstats.ifs_opackets++;
330 #define INCR_OERRORS(ppa) ppa->ifstats.ifs_oerrors++;
334 * STREAMS driver entry points.
338 pppopen(q, devp, oflag, sflag, credp)
344 pppopen(q, dev, oflag, sflag)
346 int dev; /* really dev_t */
359 DRV_OPEN_OK(dev); /* device is already open */
362 /* Calculate max_bband & def_band from definitions in prioq.h
363 This colud be done at some more approtiate time (less often)
364 but this way it works well so I'll just leave it here */
372 if (*ptr++ == IPPORT_DEFAULT) {
376 max_band += new_band;
380 def_band = max_band - def_band;
384 if (sflag == CLONEOPEN) {
386 for (prevp = &minor_devs; (up = *prevp) != 0; prevp = &up->nextmn) {
393 mn = getminor(*devp);
397 for (prevp = &minor_devs; (up = *prevp) != 0; prevp = &up->nextmn) {
402 /* this can't happen */
403 q->q_ptr = WR(q)->q_ptr = (caddr_t) up;
409 * Construct a new minor node.
411 up = (upperstr_t *) ALLOC_SLEEP(sizeof(upperstr_t));
412 bzero((caddr_t) up, sizeof(upperstr_t));
414 DPRINT("pppopen: out of kernel memory\n");
421 *devp = makedevice(getmajor(*devp), mn);
425 up->flags |= US_PRIV;
427 up->state = DL_UNATTACHED;
430 up->ifflags = IFF_UP | IFF_POINTOPOINT;
433 up->last_sent = up->last_recv = time;
434 up->npmode = NPMODE_DROP;
435 q->q_ptr = (caddr_t) up;
436 WR(q)->q_ptr = (caddr_t) up;
439 mutex_init(&up->stats_lock, NULL, MUTEX_DRIVER, NULL);
444 DRV_OPEN_OK(makedev(major(dev), mn));
449 pppclose(q, flag, credp)
459 upperstr_t *up, **upp;
460 upperstr_t *as, *asnext;
465 up = (upperstr_t *) q->q_ptr;
467 DPRINT("pppclose: q_ptr = 0\n");
470 if (up->flags & US_DBGLOG)
471 DPRINT2("ppp/%d: close, flags=%x\n", up->mn, up->flags);
472 if (up->flags & US_CONTROL) {
474 struct ifstats *ifp, *pifp;
476 if (up->lowerq != 0) {
477 /* Gack! the lower stream should have be unlinked earlier! */
478 DPRINT1("ppp%d: lower stream still connected on close?\n",
481 up->lowerq->q_ptr = 0;
482 RD(up->lowerq)->q_ptr = 0;
488 * This stream represents a PPA:
489 * For all streams attached to the PPA, clear their
490 * references to this PPA.
491 * Then remove this PPA from the list of PPAs.
493 for (as = up->next; as != 0; as = asnext) {
497 if (as->flags & US_BLOCKED) {
498 as->flags &= ~US_BLOCKED;
499 flushq(WR(as->q), FLUSHDATA);
502 for (upp = &ppas; *upp != 0; upp = &(*upp)->nextppa)
508 /* Remove the statistics from the active list. */
509 for (ifp = ifstats, pifp = 0; ifp; ifp = ifp->ifs_next) {
510 if (ifp == &up->ifstats) {
512 pifp->ifs_next = ifp->ifs_next;
514 ifstats = ifp->ifs_next;
522 * If this stream is attached to a PPA,
523 * remove it from the PPA's list.
525 if ((as = up->ppa) != 0) {
526 for (; as->next != 0; as = as->next)
527 if (as->next == up) {
536 kstat_delete(up->kstats);
537 mutex_destroy(&up->stats_lock);
543 for (prevp = &minor_devs; *prevp != 0; prevp = &(*prevp)->nextmn) {
549 FREE(up, sizeof(upperstr_t));
556 * A message from on high. We do one of three things:
558 * - put the message on the lower write stream
559 * - queue it for our service routine
566 upperstr_t *us, *ppa, *nps;
576 struct ppp_idle *pip;
584 us = (upperstr_t *) q->q_ptr;
586 DPRINT("pppuwput: q_ptr = 0!\n");
590 DPRINT1("pppuwput/%d: mp = 0!\n", us->mn);
593 if (mp->b_datap == 0) {
594 DPRINT1("pppuwput/%d: mp->b_datap = 0!\n", us->mn);
597 switch (mp->b_datap->db_type) {
601 dlpi_request(q, mp, us);
606 if (us->flags & US_DBGLOG)
607 DPRINT3("ppp/%d: uwput M_DATA len=%d flags=%x\n",
608 us->mn, msgdsize(mp), us->flags);
609 if (us->ppa == 0 || msgdsize(mp) > us->ppa->mtu + PPP_HDRLEN
611 || (us->flags & US_CONTROL) == 0
614 DPRINT1("pppuwput: junk data len=%d\n", msgdsize(mp));
619 if ((us->flags & US_CONTROL) == 0 && !pass_packet(us, mp, 1))
622 if (!send_data(mp, us))
627 iop = (struct iocblk *) mp->b_rptr;
629 if (us->flags & US_DBGLOG)
630 DPRINT3("ppp/%d: ioctl %x count=%d\n",
631 us->mn, iop->ioc_cmd, iop->ioc_count);
632 switch (iop->ioc_cmd) {
634 if ((us->flags & US_CONTROL) == 0 || us->lowerq != 0)
636 if (mp->b_cont == 0) {
637 DPRINT1("pppuwput/%d: ioctl I_LINK b_cont = 0!\n", us->mn);
640 lb = (struct linkblk *) mp->b_cont->b_rptr;
643 DPRINT1("pppuwput/%d: ioctl I_LINK l_qbot = 0!\n", us->mn);
648 lq->q_ptr = (caddr_t) q;
649 RD(lq)->q_ptr = (caddr_t) us->q;
653 us->flags &= ~US_LASTMOD;
654 /* Unblock upper streams which now feed this lower stream. */
656 /* Send useful information down to the modules which
657 are now linked below us. */
658 putctl2(lq, M_CTL, PPPCTL_UNIT, us->ppa_id);
659 putctl4(lq, M_CTL, PPPCTL_MRU, us->mru);
660 putctl4(lq, M_CTL, PPPCTL_MTU, us->mtu);
662 /* Lower tty driver's queue hiwat/lowat from default 4096/128
663 to 256/128 since we don't want queueing of data on
664 output to physical device */
667 for (tlq = lq; tlq->q_next != NULL; tlq = tlq->q_next)
669 strqset(tlq, QHIWAT, 0, 256);
670 strqset(tlq, QLOWAT, 0, 128);
676 if (mp->b_cont == 0) {
677 DPRINT1("pppuwput/%d: ioctl I_UNLINK b_cont = 0!\n", us->mn);
680 lb = (struct linkblk *) mp->b_cont->b_rptr;
682 if (us->lowerq != lb->l_qbot) {
683 DPRINT2("ppp unlink: lowerq=%x qbot=%x\n",
684 us->lowerq, lb->l_qbot);
689 qwriter(q, mp, detach_lower, PERIM_OUTER);
694 if (us->flags & US_CONTROL)
696 if ((us->flags & US_PRIV) == 0) {
700 /* Arrange to return an int */
701 if ((mq = mp->b_cont) == 0
702 || mq->b_datap->db_lim - mq->b_rptr < sizeof(int)) {
703 mq = allocb(sizeof(int), BPRI_HI);
713 iop->ioc_count = sizeof(int);
714 mq->b_wptr = mq->b_rptr + sizeof(int);
715 qwriter(q, mp, new_ppa, PERIM_OUTER);
720 /* like dlpi_attach, for programs which can't write to
721 the stream (like pppstats) */
722 if (iop->ioc_count != sizeof(int) || us->ppa != 0)
724 if (mp->b_cont == 0) {
725 DPRINT1("pppuwput/%d: ioctl PPPIO_ATTACH b_cont = 0!\n", us->mn);
728 n = *(int *)mp->b_cont->b_rptr;
729 for (ppa = ppas; ppa != 0; ppa = ppa->nextppa)
730 if (ppa->ppa_id == n)
736 qwriter(q, mp, attach_ppa, PERIM_OUTER);
742 /* Attach to a given SAP. */
743 if (iop->ioc_count != sizeof(int) || us->ppa == 0)
745 if (mp->b_cont == 0) {
746 DPRINT1("pppuwput/%d: ioctl PPPIO_BIND b_cont = 0!\n", us->mn);
749 n = *(int *)mp->b_cont->b_rptr;
750 /* n must be a valid PPP network protocol number. */
751 if (n < 0x21 || n > 0x3fff || (n & 0x101) != 1)
753 /* check that no other stream is bound to this sap already. */
754 for (os = us->ppa; os != 0; os = os->next)
766 if (iop->ioc_count != sizeof(int) || (us->flags & US_CONTROL) == 0)
768 if (mp->b_cont == 0) {
769 DPRINT1("pppuwput/%d: ioctl PPPIO_MRU b_cont = 0!\n", us->mn);
772 n = *(int *)mp->b_cont->b_rptr;
773 if (n <= 0 || n > PPP_MAXMRU)
779 putctl4(us->lowerq, M_CTL, PPPCTL_MRU, n);
785 if (iop->ioc_count != sizeof(int) || (us->flags & US_CONTROL) == 0)
787 if (mp->b_cont == 0) {
788 DPRINT1("pppuwput/%d: ioctl PPPIO_MTU b_cont = 0!\n", us->mn);
791 n = *(int *)mp->b_cont->b_rptr;
792 if (n <= 0 || n > PPP_MAXMTU)
796 /* The MTU reported in netstat, not used as IP max packet size! */
797 us->ifstats.ifs_mtu = n;
800 putctl4(us->lowerq, M_CTL, PPPCTL_MTU, n);
806 us->flags |= US_LASTMOD;
811 if (iop->ioc_count != sizeof(int))
813 if (mp->b_cont == 0) {
814 DPRINT1("pppuwput/%d: ioctl PPPIO_DEBUG b_cont = 0!\n", us->mn);
817 n = *(int *)mp->b_cont->b_rptr;
818 if (n == PPPDBG_DUMP + PPPDBG_DRIVER) {
819 qwriter(q, NULL, debug_dump, PERIM_OUTER);
822 } else if (n == PPPDBG_LOG + PPPDBG_DRIVER) {
823 DPRINT1("ppp/%d: debug log enabled\n", us->mn);
824 us->flags |= US_DBGLOG;
828 if (us->ppa == 0 || us->ppa->lowerq == 0)
830 putnext(us->ppa->lowerq, mp);
836 if (iop->ioc_count != 2 * sizeof(int))
838 if ((us->flags & US_CONTROL) == 0)
840 if (mp->b_cont == 0) {
841 DPRINT1("pppuwput/%d: ioctl PPPIO_NPMODE b_cont = 0!\n", us->mn);
844 sap = ((int *)mp->b_cont->b_rptr)[0];
845 for (nps = us->next; nps != 0; nps = nps->next) {
846 if (us->flags & US_DBGLOG)
847 DPRINT2("us = 0x%x, us->next->sap = 0x%x\n", nps, nps->sap);
852 if (us->flags & US_DBGLOG)
853 DPRINT2("ppp/%d: no stream for sap %x\n", us->mn, sap);
856 /* XXX possibly should use qwriter here */
857 nps->npmode = (enum NPmode) ((int *)mp->b_cont->b_rptr)[1];
858 if (nps->npmode != NPMODE_QUEUE && (nps->flags & US_BLOCKED) != 0)
865 if ((ppa = us->ppa) == 0)
867 mq = allocb(sizeof(struct ppp_idle), BPRI_HI);
876 pip = (struct ppp_idle *) mq->b_wptr;
877 pip->xmit_idle = time - ppa->last_sent;
878 pip->recv_idle = time - ppa->last_recv;
879 mq->b_wptr += sizeof(struct ppp_idle);
880 iop->ioc_count = sizeof(struct ppp_idle);
886 /* Sent from IP down to us. Attach the ifstats structure. */
887 if (iop->ioc_count != sizeof(struct ifreq) || us->ppa == 0)
889 ifr = (struct ifreq *)mp->b_cont->b_rptr;
890 /* Find the unit number in the interface name. */
891 for (i = 0; i < IFNAMSIZ; i++) {
892 if (ifr->ifr_name[i] == 0 ||
893 (ifr->ifr_name[i] >= '0' &&
894 ifr->ifr_name[i] <= '9'))
897 us->ifname[i] = ifr->ifr_name[i];
901 /* Convert the unit number to binary. */
902 for (n = 0; i < IFNAMSIZ; i++) {
903 if (ifr->ifr_name[i] == 0) {
907 n = n * 10 + ifr->ifr_name[i] - '0';
911 /* Verify the ppa. */
912 if (us->ppa->ppa_id != n)
916 /* Set up the netstat block. */
917 strncpy (ppa->ifname, us->ifname, IFNAMSIZ);
919 ppa->ifstats.ifs_name = ppa->ifname;
920 ppa->ifstats.ifs_unit = n;
921 ppa->ifstats.ifs_active = us->state != DL_UNBOUND;
922 ppa->ifstats.ifs_mtu = ppa->mtu;
924 /* Link in statistics used by netstat. */
925 ppa->ifstats.ifs_next = ifstats;
926 ifstats = &ppa->ifstats;
933 if (!(us->flags & US_CONTROL)) {
939 ((struct iocblk_in *)iop)->ioc_ifflags = us->ifflags;
944 if (!(us->flags & US_CONTROL)) {
950 us->ifflags = ((struct iocblk_in *)iop)->ioc_ifflags;
955 if (!(us->flags & US_CONTROL)) {
961 us->ifflags |= IFF_RUNNING;
962 ((struct iocblk_in *)iop)->ioc_ifflags |= IFF_RUNNING;
968 * Vanilla SVR4 systems don't handle SIOCSIFMTU, rather
969 * they take the MTU from the DL_INFO_ACK we sent in response
970 * to their DL_INFO_REQ. Fortunately, they will update the
971 * MTU if we send an unsolicited DL_INFO_ACK up.
973 if ((mq = allocb(sizeof(dl_info_req_t), BPRI_HI)) == 0)
974 break; /* should do bufcall */
975 ((union DL_primitives *)mq->b_rptr)->dl_primitive = DL_INFO_REQ;
976 mq->b_wptr = mq->b_rptr + sizeof(dl_info_req_t);
977 dlpi_request(q, mq, us);
992 if (us->ppa == 0 || us->ppa->lowerq == 0)
994 us->ioc_id = iop->ioc_id;
996 switch (iop->ioc_cmd) {
999 if (us->flags & US_LASTMOD) {
1003 putnext(us->ppa->lowerq, mp);
1006 if (us->flags & US_PRIV)
1007 putnext(us->ppa->lowerq, mp);
1009 DPRINT1("ppp ioctl %x rejected\n", iop->ioc_cmd);
1018 iop->ioc_error = error;
1019 mp->b_datap->db_type = M_IOCNAK;
1021 } else if (error == 0) {
1022 mp->b_datap->db_type = M_IOCACK;
1028 if (us->flags & US_DBGLOG)
1029 DPRINT2("ppp/%d: flush %x\n", us->mn, *mp->b_rptr);
1030 if (*mp->b_rptr & FLUSHW)
1031 flushq(q, FLUSHDATA);
1032 if (*mp->b_rptr & FLUSHR) {
1033 *mp->b_rptr &= ~FLUSHW;
1048 dlpi_request(q, mp, us)
1053 union DL_primitives *d = (union DL_primitives *) mp->b_rptr;
1054 int size = mp->b_wptr - mp->b_rptr;
1056 upperstr_t *ppa, *os;
1058 dl_info_ack_t *info;
1059 dl_bind_ack_t *ackp;
1060 #if DL_CURRENT_VERSION >= 2
1061 dl_phys_addr_ack_t *paddrack;
1062 static struct ether_addr eaddr = {0};
1065 if (us->flags & US_DBGLOG)
1066 DPRINT3("ppp/%d: dlpi prim %x len=%d\n", us->mn,
1067 d->dl_primitive, size);
1068 switch (d->dl_primitive) {
1070 if (size < sizeof(dl_info_req_t))
1072 if ((reply = allocb(sizeof(dl_info_ack_t), BPRI_HI)) == 0)
1073 break; /* should do bufcall */
1074 reply->b_datap->db_type = M_PCPROTO;
1075 info = (dl_info_ack_t *) reply->b_wptr;
1076 reply->b_wptr += sizeof(dl_info_ack_t);
1077 bzero((caddr_t) info, sizeof(dl_info_ack_t));
1078 info->dl_primitive = DL_INFO_ACK;
1079 info->dl_max_sdu = us->ppa? us->ppa->mtu: PPP_MAXMTU;
1080 info->dl_min_sdu = 1;
1081 info->dl_addr_length = sizeof(uint);
1082 info->dl_mac_type = DL_OTHER; /* a bigger lie */
1083 info->dl_current_state = us->state;
1084 info->dl_service_mode = DL_CLDLS;
1085 info->dl_provider_style = DL_STYLE2;
1086 #if DL_CURRENT_VERSION >= 2
1087 info->dl_sap_length = sizeof(uint);
1088 info->dl_version = DL_CURRENT_VERSION;
1094 if (size < sizeof(dl_attach_req_t))
1096 if (us->state != DL_UNATTACHED || us->ppa != 0) {
1097 dlpi_error(q, us, DL_ATTACH_REQ, DL_OUTSTATE, 0);
1100 for (ppa = ppas; ppa != 0; ppa = ppa->nextppa)
1101 if (ppa->ppa_id == d->attach_req.dl_ppa)
1104 dlpi_error(q, us, DL_ATTACH_REQ, DL_BADPPA, 0);
1108 qwriter(q, mp, attach_ppa, PERIM_OUTER);
1112 if (size < sizeof(dl_detach_req_t))
1114 if (us->state != DL_UNBOUND || us->ppa == 0) {
1115 dlpi_error(q, us, DL_DETACH_REQ, DL_OUTSTATE, 0);
1118 qwriter(q, mp, detach_ppa, PERIM_OUTER);
1122 if (size < sizeof(dl_bind_req_t))
1124 if (us->state != DL_UNBOUND || us->ppa == 0) {
1125 dlpi_error(q, us, DL_BIND_REQ, DL_OUTSTATE, 0);
1129 /* apparently this test fails (unnecessarily?) on some systems */
1130 if (d->bind_req.dl_service_mode != DL_CLDLS) {
1131 dlpi_error(q, us, DL_BIND_REQ, DL_UNSUPPORTED, 0);
1136 /* saps must be valid PPP network protocol numbers,
1137 except that we accept ETHERTYPE_IP in place of PPP_IP. */
1138 sap = d->bind_req.dl_sap;
1142 if (us->flags & US_DBGLOG)
1143 DPRINT2("DL_BIND_REQ: ip gives sap = 0x%x, us = 0x%x", sap, us);
1144 if (sap == ETHERTYPE_IP)
1146 else if (sap == ETHERTYPE_IP6)
1149 dlpi_error(q, us, DL_BIND_REQ, DL_BADADDR, 0);
1153 if (sap == ETHERTYPE_IP)
1155 if (sap < 0x21 || sap > 0x3fff || (sap & 0x101) != 1) {
1156 dlpi_error(q, us, DL_BIND_REQ, DL_BADADDR, 0);
1159 #endif /* defined(SOL2) */
1161 /* check that no other stream is bound to this sap already. */
1162 for (os = us->ppa; os != 0; os = os->next)
1166 dlpi_error(q, us, DL_BIND_REQ, DL_NOADDR, 0);
1171 us->state = DL_IDLE;
1173 if ((reply = allocb(sizeof(dl_bind_ack_t) + sizeof(uint),
1175 break; /* should do bufcall */
1176 ackp = (dl_bind_ack_t *) reply->b_wptr;
1177 reply->b_wptr += sizeof(dl_bind_ack_t) + sizeof(uint);
1178 reply->b_datap->db_type = M_PCPROTO;
1179 bzero((caddr_t) ackp, sizeof(dl_bind_ack_t));
1180 ackp->dl_primitive = DL_BIND_ACK;
1182 ackp->dl_addr_length = sizeof(uint);
1183 ackp->dl_addr_offset = sizeof(dl_bind_ack_t);
1184 *(uint *)(ackp+1) = sap;
1189 if (size < sizeof(dl_unbind_req_t))
1191 if (us->state != DL_IDLE) {
1192 dlpi_error(q, us, DL_UNBIND_REQ, DL_OUTSTATE, 0);
1196 us->state = DL_UNBOUND;
1198 us->ppa->ifstats.ifs_active = 0;
1200 dlpi_ok(q, DL_UNBIND_REQ);
1203 case DL_UNITDATA_REQ:
1204 if (size < sizeof(dl_unitdata_req_t))
1206 if (us->state != DL_IDLE) {
1207 dlpi_error(q, us, DL_UNITDATA_REQ, DL_OUTSTATE, 0);
1210 if ((ppa = us->ppa) == 0) {
1211 cmn_err(CE_CONT, "ppp: in state dl_idle but ppa == 0?\n");
1214 len = mp->b_cont == 0? 0: msgdsize(mp->b_cont);
1215 if (len > ppa->mtu) {
1216 DPRINT2("dlpi data too large (%d > %d)\n", len, ppa->mtu);
1221 /* Extract s_port & d_port from IP-packet, the code is a bit
1222 dirty here, but so am I, too... */
1223 if (mp->b_datap->db_type == M_PROTO && us->sap == PPP_IP
1224 && mp->b_cont != 0) {
1228 u_char band_unset, cur_band, syn;
1229 u_short s_port, d_port;
1231 bb = mp->b_cont->b_rptr; /* bb points to IP-header*/
1232 len = mp->b_cont->b_wptr - mp->b_cont->b_rptr;
1234 s_port = IPPORT_DEFAULT;
1235 d_port = IPPORT_DEFAULT;
1236 if (len >= 20) { /* 20 = minimum length of IP header */
1237 iphlen = (bb[0] & 0x0f) * 4;
1242 if (len >= 20) { /* min length of TCP header */
1243 s_port = (tlh[0] << 8) + tlh[1];
1244 d_port = (tlh[2] << 8) + tlh[3];
1245 syn = tlh[13] & 0x02;
1249 if (len >= 8) { /* min length of UDP header */
1250 s_port = (tlh[0] << 8) + tlh[1];
1251 d_port = (tlh[2] << 8) + tlh[3];
1258 * Now calculate b_band for this packet from the
1259 * port-priority table.
1262 cur_band = max_band;
1265 while (*ptr && band_unset)
1266 if (s_port == *ptr || d_port == *ptr++) {
1267 mp->b_band = cur_band;
1275 mp->b_band = def_band;
1276 /* It may be usable to urge SYN packets a bit */
1281 /* this assumes PPP_HDRLEN <= sizeof(dl_unitdata_req_t) */
1282 if (mp->b_datap->db_ref > 1) {
1283 np = allocb(PPP_HDRLEN, BPRI_HI);
1286 np->b_cont = mp->b_cont;
1291 mp->b_datap->db_type = M_DATA;
1292 /* XXX should use dl_dest_addr_offset/length here,
1293 but we would have to translate ETHERTYPE_IP -> PPP_IP */
1294 mp->b_wptr = mp->b_rptr + PPP_HDRLEN;
1295 mp->b_rptr[0] = PPP_ALLSTATIONS;
1296 mp->b_rptr[1] = PPP_UI;
1297 mp->b_rptr[2] = us->sap >> 8;
1298 mp->b_rptr[3] = us->sap;
1299 if (pass_packet(us, mp, 1)) {
1300 if (!send_data(mp, us))
1305 #if DL_CURRENT_VERSION >= 2
1306 case DL_PHYS_ADDR_REQ:
1307 if (size < sizeof(dl_phys_addr_req_t))
1311 * Don't check state because ifconfig sends this one down too
1314 if ((reply = allocb(sizeof(dl_phys_addr_ack_t)+ETHERADDRL,
1316 break; /* should do bufcall */
1317 reply->b_datap->db_type = M_PCPROTO;
1318 paddrack = (dl_phys_addr_ack_t *) reply->b_wptr;
1319 reply->b_wptr += sizeof(dl_phys_addr_ack_t);
1320 bzero((caddr_t) paddrack, sizeof(dl_phys_addr_ack_t)+ETHERADDRL);
1321 paddrack->dl_primitive = DL_PHYS_ADDR_ACK;
1322 paddrack->dl_addr_length = ETHERADDRL;
1323 paddrack->dl_addr_offset = sizeof(dl_phys_addr_ack_t);
1324 bcopy(&eaddr, reply->b_wptr, ETHERADDRL);
1325 reply->b_wptr += ETHERADDRL;
1330 #if DL_CURRENT_VERSION >= 2
1331 case DL_SET_PHYS_ADDR_REQ:
1332 case DL_SUBS_BIND_REQ:
1333 case DL_SUBS_UNBIND_REQ:
1334 case DL_ENABMULTI_REQ:
1335 case DL_DISABMULTI_REQ:
1336 case DL_PROMISCON_REQ:
1337 case DL_PROMISCOFF_REQ:
1340 case DL_REPLY_UPDATE_REQ:
1342 case DL_DATA_ACK_REQ:
1344 case DL_CONNECT_REQ:
1346 dlpi_error(q, us, d->dl_primitive, DL_NOTSUPPORTED, 0);
1349 case DL_CONNECT_RES:
1350 case DL_DISCONNECT_REQ:
1353 dlpi_error(q, us, d->dl_primitive, DL_OUTSTATE, 0);
1357 dlpi_error(q, us, d->dl_primitive, DL_BADQOSTYPE, 0);
1360 #if DL_CURRENT_VERSION >= 2
1367 cmn_err(CE_CONT, "ppp: unknown dlpi prim 0x%x\n", d->dl_primitive);
1370 dlpi_error(q, us, d->dl_primitive, DL_BADPRIM, 0);
1377 dlpi_error(q, us, prim, err, uerr)
1380 int prim, err, uerr;
1383 dl_error_ack_t *errp;
1385 if (us->flags & US_DBGLOG)
1386 DPRINT3("ppp/%d: dlpi error, prim=%x, err=%x\n", us->mn, prim, err);
1387 reply = allocb(sizeof(dl_error_ack_t), BPRI_HI);
1389 return; /* XXX should do bufcall */
1390 reply->b_datap->db_type = M_PCPROTO;
1391 errp = (dl_error_ack_t *) reply->b_wptr;
1392 reply->b_wptr += sizeof(dl_error_ack_t);
1393 errp->dl_primitive = DL_ERROR_ACK;
1394 errp->dl_error_primitive = prim;
1395 errp->dl_errno = err;
1396 errp->dl_unix_errno = uerr;
1408 reply = allocb(sizeof(dl_ok_ack_t), BPRI_HI);
1410 return; /* XXX should do bufcall */
1411 reply->b_datap->db_type = M_PCPROTO;
1412 okp = (dl_ok_ack_t *) reply->b_wptr;
1413 reply->b_wptr += sizeof(dl_ok_ack_t);
1414 okp->dl_primitive = DL_OK_ACK;
1415 okp->dl_correct_primitive = prim;
1418 #endif /* NO_DLPI */
1421 pass_packet(us, mp, outbound)
1429 if ((ppa = us->ppa) == 0) {
1434 #ifdef FILTER_PACKETS
1435 pass = ip_hard_filter(us, mp, outbound);
1438 * Here is where we might, in future, decide whether to pass
1439 * or drop the packet, and whether it counts as link activity.
1442 #endif /* FILTER_PACKETS */
1445 /* pass only if link already up, and don't update time */
1446 if (ppa->lowerq == 0) {
1453 ppa->last_sent = time;
1455 ppa->last_recv = time;
1462 * We have some data to send down to the lower stream (or up the
1463 * control stream, if we don't have a lower stream attached).
1464 * Returns 1 if the message was dealt with, 0 if it wasn't able
1465 * to be sent on and should therefore be queued up.
1474 if ((us->flags & US_BLOCKED) || us->npmode == NPMODE_QUEUE)
1477 if (ppa == 0 || us->npmode == NPMODE_DROP || us->npmode == NPMODE_ERROR) {
1478 if (us->flags & US_DBGLOG)
1479 DPRINT2("ppp/%d: dropping pkt (npmode=%d)\n", us->mn, us->npmode);
1483 if (ppa->lowerq == 0) {
1484 /* try to send it up the control stream */
1485 if (bcanputnext(ppa->q, mp->b_band)) {
1487 * The message seems to get corrupted for some reason if
1488 * we just send the message up as it is, so we send a copy.
1490 mblk_t *np = copymsg(mp);
1493 putnext(ppa->q, np);
1497 if (bcanputnext(ppa->lowerq, mp->b_band)) {
1498 MT_ENTER(&ppa->stats_lock);
1499 ppa->stats.ppp_opackets++;
1500 ppa->stats.ppp_obytes += msgdsize(mp);
1501 #ifdef INCR_OPACKETS
1504 MT_EXIT(&ppa->stats_lock);
1506 * The lower queue is only ever detached while holding an
1507 * exclusive lock on the whole driver. So we can be confident
1508 * that the lower queue is still there.
1510 putnext(ppa->lowerq, mp);
1514 us->flags |= US_BLOCKED;
1519 * Allocate a new PPA id and link this stream into the list of PPAs.
1520 * This procedure is called with an exclusive lock on all queues in
1528 upperstr_t *us, *up, **usp;
1531 us = (upperstr_t *) q->q_ptr;
1533 DPRINT("new_ppa: q_ptr = 0!\n");
1539 while ((up = *usp) != 0 && ppa_id == up->ppa_id) {
1543 us->ppa_id = ppa_id;
1548 us->flags |= US_CONTROL;
1549 us->npmode = NPMODE_PASS;
1556 * Create a kstats record for our statistics, so netstat -i works.
1558 if (us->kstats == 0) {
1561 sprintf(unit, "ppp%d", us->ppa->ppa_id);
1562 us->kstats = kstat_create("ppp", us->ppa->ppa_id, unit,
1563 "net", KSTAT_TYPE_NAMED, 4, 0);
1564 if (us->kstats != 0) {
1565 kstat_named_t *kn = KSTAT_NAMED_PTR(us->kstats);
1567 strcpy(kn[0].name, "ipackets");
1568 kn[0].data_type = KSTAT_DATA_ULONG;
1569 strcpy(kn[1].name, "ierrors");
1570 kn[1].data_type = KSTAT_DATA_ULONG;
1571 strcpy(kn[2].name, "opackets");
1572 kn[2].data_type = KSTAT_DATA_ULONG;
1573 strcpy(kn[3].name, "oerrors");
1574 kn[3].data_type = KSTAT_DATA_ULONG;
1575 kstat_install(us->kstats);
1580 *(int *)mp->b_cont->b_rptr = ppa_id;
1581 mp->b_datap->db_type = M_IOCACK;
1592 us = (upperstr_t *) q->q_ptr;
1594 DPRINT("attach_ppa: q_ptr = 0!\n");
1599 us->state = DL_UNBOUND;
1601 for (t = us->ppa; t->next != 0; t = t->next)
1605 if (mp->b_datap->db_type == M_IOCTL) {
1606 mp->b_datap->db_type = M_IOCACK;
1610 dlpi_ok(q, DL_ATTACH_REQ);
1622 us = (upperstr_t *) q->q_ptr;
1624 DPRINT("detach_ppa: q_ptr = 0!\n");
1628 for (t = us->ppa; t->next != 0; t = t->next)
1629 if (t->next == us) {
1636 us->state = DL_UNATTACHED;
1637 dlpi_ok(q, DL_DETACH_REQ);
1642 * We call this with qwriter in order to give the upper queue procedures
1643 * the guarantee that the lower queue is not going to go away while
1644 * they are executing.
1653 us = (upperstr_t *) q->q_ptr;
1655 DPRINT("detach_lower: q_ptr = 0!\n");
1660 us->lowerq->q_ptr = 0;
1661 RD(us->lowerq)->q_ptr = 0;
1665 /* Unblock streams which now feed back up the control stream. */
1668 mp->b_datap->db_type = M_IOCACK;
1676 upperstr_t *us, *as;
1679 us = (upperstr_t *) q->q_ptr;
1681 DPRINT("pppuwsrv: q_ptr = 0!\n");
1686 * If this is a control stream, then this service procedure
1687 * probably got enabled because of flow control in the lower
1688 * stream being enabled (or because of the lower stream going
1689 * away). Therefore we enable the service procedure of all
1690 * attached upper streams.
1692 if (us->flags & US_CONTROL) {
1693 for (as = us->next; as != 0; as = as->next)
1697 /* Try to send on any data queued here. */
1698 us->flags &= ~US_BLOCKED;
1699 while ((mp = getq(q)) != 0) {
1700 if (!send_data(mp, us)) {
1709 /* should never get called... */
1726 * Flow control has back-enabled this stream:
1727 * enable the upper write service procedure for
1728 * the upper control stream for this lower stream.
1731 uq = (queue_t *) q->q_ptr;
1739 * This should only get called for control streams.
1746 upperstr_t *ppa, *us;
1750 ppa = (upperstr_t *) q->q_ptr;
1752 DPRINT("pppurput: q_ptr = 0!\n");
1756 switch (mp->b_datap->db_type) {
1758 MT_ENTER(&ppa->stats_lock);
1759 switch (*mp->b_rptr) {
1764 ppa->stats.ppp_ierrors++;
1770 ppa->stats.ppp_oerrors++;
1773 MT_EXIT(&ppa->stats_lock);
1780 * Attempt to match up the response with the stream
1781 * that the request came from.
1783 iop = (struct iocblk *) mp->b_rptr;
1784 for (us = ppa; us != 0; us = us->next)
1785 if (us->ioc_id == iop->ioc_id)
1795 * The serial device has hung up. We don't want to send
1796 * the M_HANGUP message up to pppd because that will stop
1797 * us from using the control stream any more. Instead we
1798 * send a zero-length message as an end-of-file indication.
1801 mp = allocb(1, BPRI_HI);
1803 DPRINT1("ppp/%d: couldn't allocate eof message!\n", ppa->mn);
1806 putnext(ppa->q, mp);
1810 if (mp->b_datap->db_type == M_DATA) {
1812 if (mp->b_wptr - mp->b_rptr < PPP_HDRLEN) {
1813 PULLUP(mp, PPP_HDRLEN);
1815 DPRINT1("ppp_urput: msgpullup failed (len=%d)\n", len);
1819 MT_ENTER(&ppa->stats_lock);
1820 ppa->stats.ppp_ipackets++;
1821 ppa->stats.ppp_ibytes += len;
1822 #ifdef INCR_IPACKETS
1825 MT_EXIT(&ppa->stats_lock);
1827 proto = PPP_PROTOCOL(mp->b_rptr);
1828 if (proto < 0x8000 && (us = find_dest(ppa, proto)) != 0) {
1830 * A data packet for some network protocol.
1831 * Queue it on the upper stream for that protocol.
1832 * XXX could we just putnext it? (would require thought)
1833 * The rblocked flag is there to ensure that we keep
1834 * messages in order for each network protocol.
1836 if (!pass_packet(us, mp, 0))
1838 if (!us->rblocked && !canput(us->q))
1848 * A control frame, a frame for an unknown protocol,
1849 * or some other message type.
1850 * Send it up to pppd via the control stream.
1852 if (queclass(mp) == QPCTL || canputnext(ppa->q))
1853 putnext(ppa->q, mp);
1866 upperstr_t *us, *as;
1869 dl_unitdata_ind_t *ud;
1873 us = (upperstr_t *) q->q_ptr;
1875 DPRINT("pppursrv: q_ptr = 0!\n");
1879 if (us->flags & US_CONTROL) {
1882 * If there is no lower queue attached, run the write service
1883 * routines of other upper streams attached to this PPA.
1885 if (us->lowerq == 0) {
1888 if (as->flags & US_BLOCKED)
1895 * Messages get queued on this stream's read queue if they
1896 * can't be queued on the read queue of the attached stream
1897 * that they are destined for. This is for flow control -
1898 * when this queue fills up, the lower read put procedure will
1899 * queue messages there and the flow control will propagate
1902 while ((mp = getq(q)) != 0) {
1903 proto = PPP_PROTOCOL(mp->b_rptr);
1904 if (proto < 0x8000 && (as = find_dest(us, proto)) != 0) {
1917 /* can now put stuff directly on network protocol streams again */
1918 for (as = us->next; as != 0; as = as->next)
1923 * If this stream has a lower stream attached,
1924 * enable the read queue's service routine.
1925 * XXX we should really only do this if the queue length
1926 * has dropped below the low-water mark.
1928 if (us->lowerq != 0)
1929 qenable(RD(us->lowerq));
1933 * A network protocol stream. Put a DLPI header on each
1934 * packet and send it on.
1935 * (Actually, it seems that the IP module will happily
1936 * accept M_DATA messages without the DL_UNITDATA_IND header.)
1938 while ((mp = getq(q)) != 0) {
1939 if (!canputnext(q)) {
1944 proto = PPP_PROTOCOL(mp->b_rptr);
1945 mp->b_rptr += PPP_HDRLEN;
1946 hdr = allocb(sizeof(dl_unitdata_ind_t) + 2 * sizeof(uint),
1949 /* XXX should put it back and use bufcall */
1953 hdr->b_datap->db_type = M_PROTO;
1954 ud = (dl_unitdata_ind_t *) hdr->b_wptr;
1955 hdr->b_wptr += sizeof(dl_unitdata_ind_t) + 2 * sizeof(uint);
1957 ud->dl_primitive = DL_UNITDATA_IND;
1958 ud->dl_dest_addr_length = sizeof(uint);
1959 ud->dl_dest_addr_offset = sizeof(dl_unitdata_ind_t);
1960 ud->dl_src_addr_length = sizeof(uint);
1961 ud->dl_src_addr_offset = ud->dl_dest_addr_offset + sizeof(uint);
1962 #if DL_CURRENT_VERSION >= 2
1963 ud->dl_group_address = 0;
1965 /* Send the DLPI client the data with the SAP they requested,
1966 (e.g. ETHERTYPE_IP) rather than the PPP protocol number
1968 ((uint *)(ud + 1))[0] = us->req_sap; /* dest SAP */
1969 ((uint *)(ud + 1))[1] = us->req_sap; /* src SAP */
1973 #endif /* NO_DLPI */
1976 * Now that we have consumed some packets from this queue,
1977 * enable the control stream's read service routine so that we
1978 * can process any packets for us that might have got queued
1979 * there for flow control reasons.
1982 qenable(us->ppa->q);
1989 find_dest(ppa, proto)
1995 for (us = ppa->next; us != 0; us = us->next)
1996 if (proto == us->sap)
2002 * We simply put the message on to the associated upper control stream
2003 * (either here or in ppplrsrv). That way we enter the perimeters
2004 * before looking through the list of attached streams to decide which
2005 * stream it should go up.
2015 switch (mp->b_datap->db_type) {
2017 iop = (struct iocblk *) mp->b_rptr;
2018 iop->ioc_error = EINVAL;
2019 mp->b_datap->db_type = M_IOCNAK;
2023 if (*mp->b_rptr & FLUSHR)
2024 flushq(q, FLUSHDATA);
2025 if (*mp->b_rptr & FLUSHW) {
2026 *mp->b_rptr &= ~FLUSHR;
2034 * If we can't get the lower lock straight away, queue this one
2035 * rather than blocking, to avoid the possibility of deadlock.
2037 if (!TRYLOCK_LOWER_R) {
2043 * Check that we're still connected to the driver.
2045 uq = (queue_t *) q->q_ptr;
2048 DPRINT1("ppplrput: q = %x, uq = 0??\n", q);
2054 * Try to forward the message to the put routine for the upper
2055 * control stream for this lower stream.
2056 * If there are already messages queued here, queue this one so
2057 * they don't get out of order.
2059 if (queclass(mp) == QPCTL || (qsize(q) == 0 && canput(uq)))
2076 * Packets get queued here for flow control reasons
2077 * or if the lrput routine couldn't get the lower lock
2081 uq = (queue_t *) q->q_ptr;
2084 flushq(q, FLUSHALL);
2085 DPRINT1("ppplrsrv: q = %x, uq = 0??\n", q);
2088 while ((mp = getq(q)) != 0) {
2089 if (queclass(mp) == QPCTL || canput(uq))
2101 putctl2(q, type, code, val)
2103 int type, code, val;
2107 mp = allocb(2, BPRI_HI);
2110 mp->b_datap->db_type = type;
2111 mp->b_wptr[0] = code;
2112 mp->b_wptr[1] = val;
2119 putctl4(q, type, code, val)
2121 int type, code, val;
2125 mp = allocb(4, BPRI_HI);
2128 mp->b_datap->db_type = type;
2129 mp->b_wptr[0] = code;
2130 ((short *)mp->b_wptr)[1] = val;
2144 DPRINT("ppp upper streams:\n");
2145 for (us = minor_devs; us != 0; us = us->nextmn) {
2147 DPRINT3(" %d: q=%x rlev=%d",
2148 us->mn, uq, (uq? qsize(uq): 0));
2149 DPRINT3(" wlev=%d flags=0x%b", (uq? qsize(WR(uq)): 0),
2150 us->flags, "\020\1priv\2control\3blocked\4last");
2151 DPRINT3(" state=%x sap=%x req_sap=%x", us->state, us->sap,
2156 DPRINT1(" ppa=%d\n", us->ppa->ppa_id);
2157 if (us->flags & US_CONTROL) {
2159 DPRINT3(" control for %d lq=%x rlev=%d",
2160 us->ppa_id, lq, (lq? qsize(RD(lq)): 0));
2161 DPRINT3(" wlev=%d mru=%d mtu=%d\n",
2162 (lq? qsize(lq): 0), us->mru, us->mtu);
2165 mp->b_datap->db_type = M_IOCACK;
2169 #ifdef FILTER_PACKETS
2170 #include <netinet/in_systm.h>
2171 #include <netinet/ip.h>
2172 #include <netinet/udp.h>
2173 #include <netinet/tcp.h>
2175 #define MAX_IPHDR 128 /* max TCP/IP header size */
2178 /* The following table contains a hard-coded list of protocol/port pairs.
2179 * Any matching packets are either discarded unconditionally, or,
2180 * if ok_if_link_up is non-zero when a connection does not currently exist
2181 * (i.e., they go through if the connection is present, but never initiate
2183 * This idea came from a post by dm@garage.uun.org (David Mazieres)
2185 static struct pktfilt_tab {
2188 u_short ok_if_link_up;
2190 { IPPROTO_UDP, 520, 1 }, /* RIP, ok to pass if link is up */
2191 { IPPROTO_UDP, 123, 1 }, /* NTP, don't keep up the link for it */
2192 { -1, 0, 0 } /* terminator entry has port == -1 */
2197 ip_hard_filter(us, mp, outbound)
2203 struct pktfilt_tab *pft;
2209 /* Note, the PPP header has already been pulled up in all cases */
2210 proto = PPP_PROTOCOL(mp->b_rptr);
2211 if (us->flags & US_DBGLOG)
2212 DPRINT3("ppp/%d: filter, proto=0x%x, out=%d\n", us->mn, proto, outbound);
2217 if ((mp->b_wptr - mp->b_rptr) == PPP_HDRLEN && mp->b_cont != 0) {
2218 temp_mp = mp->b_cont;
2219 len = msgdsize(temp_mp);
2220 hlen = (len < MAX_IPHDR) ? len : MAX_IPHDR;
2221 PULLUP(temp_mp, hlen);
2223 DPRINT2("ppp/%d: filter, pullup next failed, len=%d\n",
2225 mp->b_cont = 0; /* PULLUP() freed the rest */
2229 ip = (struct ip *)mp->b_cont->b_rptr;
2233 hlen = (len < (PPP_HDRLEN+MAX_IPHDR)) ? len : (PPP_HDRLEN+MAX_IPHDR);
2236 DPRINT2("ppp/%d: filter, pullup failed, len=%d\n",
2240 ip = (struct ip *)(mp->b_rptr + PPP_HDRLEN);
2243 /* For IP traffic, certain packets (e.g., RIP) may be either
2244 * 1. ignored - dropped completely
2245 * 2. will not initiate a connection, but
2246 * will be passed if a connection is currently up.
2248 for (pft=pktfilt_tab; pft->proto != -1; pft++) {
2249 if (ip->ip_p == pft->proto) {
2250 switch(pft->proto) {
2252 if (((struct udphdr *) &((int *)ip)[ip->ip_hl])->uh_dport
2253 == htons(pft->port)) goto endfor;
2256 if (((struct tcphdr *) &((int *)ip)[ip->ip_hl])->th_dport
2257 == htons(pft->port)) goto endfor;
2263 if (pft->proto != -1) {
2264 if (us->flags & US_DBGLOG)
2265 DPRINT3("ppp/%d: found IP pkt, proto=0x%x (%d)\n",
2266 us->mn, pft->proto, pft->port);
2267 /* Discard if not connected, or if not pass_with_link_up */
2268 /* else, if link is up let go by, but don't update time */
2269 return pft->ok_if_link_up? -1: 0;
2272 } /* end switch (proto) */
2276 #endif /* FILTER_PACKETS */