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 1.21 1999/09/15 23:49:05 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>
58 #include <sys/socket.h>
59 #include <sys/sockio.h>
61 #include <netinet/in.h>
66 #include <net/ppp_defs.h>
67 #include <net/pppio.h>
71 * Modifications marked with #ifdef PRIOQ are for priority queueing of
72 * interactive traffic, and are due to Marko Zec <zec@japa.tel.fer.hr>.
75 #include <netinet/in.h>
85 * The IP module may use this SAP value for IP packets.
88 #define ETHERTYPE_IP 0x800
95 * We use this reader-writer lock to ensure that the lower streams
96 * stay connected to the upper streams while the lower-side put and
97 * service procedures are running. Essentially it is an existence
98 * lock for the upper stream associated with each lower stream.
100 krwlock_t ppp_lower_lock;
101 #define LOCK_LOWER_W rw_enter(&ppp_lower_lock, RW_WRITER)
102 #define LOCK_LOWER_R rw_enter(&ppp_lower_lock, RW_READER)
103 #define TRYLOCK_LOWER_R rw_tryenter(&ppp_lower_lock, RW_READER)
104 #define UNLOCK_LOWER rw_exit(&ppp_lower_lock)
106 #define MT_ENTER(x) mutex_enter(x)
107 #define MT_EXIT(x) mutex_exit(x)
110 * Notes on multithreaded implementation for Solaris 2:
112 * We use an inner perimeter around each queue pair and an outer
113 * perimeter around the whole driver. The inner perimeter is
114 * entered exclusively for all entry points (open, close, put,
115 * service). The outer perimeter is entered exclusively for open
116 * and close and shared for put and service. This is all done for
117 * us by the streams framework.
119 * I used to think that the perimeters were entered for the lower
120 * streams' put and service routines as well as for the upper streams'.
121 * Because of problems experienced by people, and after reading the
122 * documentation more closely, I now don't think that is true. So we
123 * now use ppp_lower_lock to give us an existence guarantee on the
124 * upper stream controlling each lower stream.
126 * Shared entry to the outer perimeter protects the existence of all
127 * the upper streams and their upperstr_t structures, and guarantees
128 * that the following fields of any upperstr_t won't change:
129 * nextmn, next, nextppa. It guarantees that the lowerq field of an
130 * upperstr_t won't go from non-zero to zero, that the global `ppas'
131 * won't change and that the no lower stream will get unlinked.
133 * Shared (reader) access to ppa_lower_lock guarantees that no lower
134 * stream will be unlinked and that the lowerq field of all upperstr_t
135 * structures won't change.
139 #define LOCK_LOWER_W 0
140 #define LOCK_LOWER_R 0
141 #define TRYLOCK_LOWER_R 1
142 #define UNLOCK_LOWER 0
143 #define MT_ENTER(x) 0
149 * Private information; one per upper stream.
151 typedef struct upperstr {
152 minor_t mn; /* minor device number */
153 struct upperstr *nextmn; /* next minor device */
154 queue_t *q; /* read q associated with this upper stream */
155 int flags; /* flag bits, see below */
156 int state; /* current DLPI state */
157 int sap; /* service access point */
158 int req_sap; /* which SAP the DLPI client requested */
159 struct upperstr *ppa; /* control stream for our ppa */
160 struct upperstr *next; /* next stream for this ppa */
161 uint ioc_id; /* last ioctl ID for this stream */
162 enum NPmode npmode; /* what to do with packets on this SAP */
163 unsigned char rblocked; /* flow control has blocked upper read strm */
164 /* N.B. rblocked is only changed by control stream's put/srv procs */
166 * There is exactly one control stream for each PPA.
167 * The following fields are only used for control streams.
170 queue_t *lowerq; /* write queue attached below this PPA */
171 struct upperstr *nextppa; /* next control stream */
174 struct pppstat stats; /* statistics */
175 time_t last_sent; /* time last NP packet sent */
176 time_t last_recv; /* time last NP packet rcvd */
178 kmutex_t stats_lock; /* lock for stats updates */
179 kstat_t *kstats; /* stats for netstat */
183 char ifname[IFNAMSIZ];
184 struct ifstats ifstats;
188 /* Values for flags */
189 #define US_PRIV 1 /* stream was opened by superuser */
190 #define US_CONTROL 2 /* stream is a control stream */
191 #define US_BLOCKED 4 /* flow ctrl has blocked lower write stream */
192 #define US_LASTMOD 8 /* no PPP modules below us */
193 #define US_DBGLOG 0x10 /* log various occurrences */
194 #define US_RBLOCKED 0x20 /* flow ctrl has blocked upper read stream */
198 static u_char max_band=0;
199 static u_char def_band=0;
201 #define IPPORT_DEFAULT 65535
204 * Port priority table
205 * Highest priority ports are listed first, lowest are listed last.
206 * ICMP & packets using unlisted ports will be treated as "default".
207 * If IPPORT_DEFAULT is not listed here, "default" packets will be
208 * assigned lowest priority.
209 * Each line should be terminated with "0".
210 * Line containing only "0" marks the end of the list.
213 static u_short prioq_table[]= {
215 22, 23, 513, 517, 518, 0,
219 20, 70, 80, 8001, 8008, 8080, 0, /* 8001,8008,8080 - common proxy ports */
225 static upperstr_t *minor_devs = NULL;
226 static upperstr_t *ppas = NULL;
229 static int pppopen __P((queue_t *, dev_t *, int, int, cred_t *));
230 static int pppclose __P((queue_t *, int, cred_t *));
232 static int pppopen __P((queue_t *, int, int, int));
233 static int pppclose __P((queue_t *, int));
235 static int pppurput __P((queue_t *, mblk_t *));
236 static int pppuwput __P((queue_t *, mblk_t *));
237 static int pppursrv __P((queue_t *));
238 static int pppuwsrv __P((queue_t *));
239 static int ppplrput __P((queue_t *, mblk_t *));
240 static int ppplwput __P((queue_t *, mblk_t *));
241 static int ppplrsrv __P((queue_t *));
242 static int ppplwsrv __P((queue_t *));
244 static void dlpi_request __P((queue_t *, mblk_t *, upperstr_t *));
245 static void dlpi_error __P((queue_t *, upperstr_t *, int, int, int));
246 static void dlpi_ok __P((queue_t *, int));
248 static int send_data __P((mblk_t *, upperstr_t *));
249 static void new_ppa __P((queue_t *, mblk_t *));
250 static void attach_ppa __P((queue_t *, mblk_t *));
251 static void detach_ppa __P((queue_t *, mblk_t *));
252 static void detach_lower __P((queue_t *, mblk_t *));
253 static void debug_dump __P((queue_t *, mblk_t *));
254 static upperstr_t *find_dest __P((upperstr_t *, int));
255 static int putctl2 __P((queue_t *, int, int, int));
256 static int putctl4 __P((queue_t *, int, int, int));
257 static int pass_packet __P((upperstr_t *ppa, mblk_t *mp, int outbound));
258 #ifdef FILTER_PACKETS
259 static int ip_hard_filter __P((upperstr_t *ppa, mblk_t *mp, int outbound));
260 #endif /* FILTER_PACKETS */
262 #define PPP_ID 0xb1a6
263 static struct module_info ppp_info = {
265 PPP_ID, "ppp", 0, 512, 512, 384
267 PPP_ID, "ppp", 0, 512, 512, 128
271 static struct qinit pppurint = {
272 pppurput, pppursrv, pppopen, pppclose, NULL, &ppp_info, NULL
275 static struct qinit pppuwint = {
276 pppuwput, pppuwsrv, NULL, NULL, NULL, &ppp_info, NULL
279 static struct qinit ppplrint = {
280 ppplrput, ppplrsrv, NULL, NULL, NULL, &ppp_info, NULL
283 static struct qinit ppplwint = {
284 ppplwput, ppplwsrv, NULL, NULL, NULL, &ppp_info, NULL
288 extern struct ifstats *ifstats;
292 struct streamtab pppinfo = {
293 &pppurint, &pppuwint,
300 * How we maintain statistics.
303 #define INCR_IPACKETS(ppa) \
304 if (ppa->kstats != 0) { \
305 KSTAT_NAMED_PTR(ppa->kstats)[0].value.ul++; \
307 #define INCR_IERRORS(ppa) \
308 if (ppa->kstats != 0) { \
309 KSTAT_NAMED_PTR(ppa->kstats)[1].value.ul++; \
311 #define INCR_OPACKETS(ppa) \
312 if (ppa->kstats != 0) { \
313 KSTAT_NAMED_PTR(ppa->kstats)[2].value.ul++; \
315 #define INCR_OERRORS(ppa) \
316 if (ppa->kstats != 0) { \
317 KSTAT_NAMED_PTR(ppa->kstats)[3].value.ul++; \
322 #define INCR_IPACKETS(ppa) ppa->ifstats.ifs_ipackets++;
323 #define INCR_IERRORS(ppa) ppa->ifstats.ifs_ierrors++;
324 #define INCR_OPACKETS(ppa) ppa->ifstats.ifs_opackets++;
325 #define INCR_OERRORS(ppa) ppa->ifstats.ifs_oerrors++;
329 * STREAMS driver entry points.
333 pppopen(q, devp, oflag, sflag, credp)
339 pppopen(q, dev, oflag, sflag)
341 int dev; /* really dev_t */
354 DRV_OPEN_OK(dev); /* device is already open */
357 /* Calculate max_bband & def_band from definitions in prioq.h
358 This colud be done at some more approtiate time (less often)
359 but this way it works well so I'll just leave it here */
367 if (*ptr++ == IPPORT_DEFAULT) {
371 max_band += new_band;
375 def_band = max_band - def_band;
379 if (sflag == CLONEOPEN) {
381 for (prevp = &minor_devs; (up = *prevp) != 0; prevp = &up->nextmn) {
388 mn = getminor(*devp);
392 for (prevp = &minor_devs; (up = *prevp) != 0; prevp = &up->nextmn) {
397 /* this can't happen */
398 q->q_ptr = WR(q)->q_ptr = (caddr_t) up;
404 * Construct a new minor node.
406 up = (upperstr_t *) ALLOC_SLEEP(sizeof(upperstr_t));
407 bzero((caddr_t) up, sizeof(upperstr_t));
409 DPRINT("pppopen: out of kernel memory\n");
416 *devp = makedevice(getmajor(*devp), mn);
420 up->flags |= US_PRIV;
422 up->state = DL_UNATTACHED;
425 up->ifflags = IFF_UP | IFF_POINTOPOINT;
428 up->last_sent = up->last_recv = time;
429 up->npmode = NPMODE_DROP;
430 q->q_ptr = (caddr_t) up;
431 WR(q)->q_ptr = (caddr_t) up;
434 mutex_init(&up->stats_lock, NULL, MUTEX_DRIVER, NULL);
439 DRV_OPEN_OK(makedev(major(dev), mn));
444 pppclose(q, flag, credp)
454 upperstr_t *up, **upp;
455 upperstr_t *as, *asnext;
460 up = (upperstr_t *) q->q_ptr;
462 DPRINT("pppclose: q_ptr = 0\n");
465 if (up->flags & US_DBGLOG)
466 DPRINT2("ppp/%d: close, flags=%x\n", up->mn, up->flags);
467 if (up->flags & US_CONTROL) {
469 struct ifstats *ifp, *pifp;
471 if (up->lowerq != 0) {
472 /* Gack! the lower stream should have be unlinked earlier! */
473 DPRINT1("ppp%d: lower stream still connected on close?\n",
476 up->lowerq->q_ptr = 0;
477 RD(up->lowerq)->q_ptr = 0;
483 * This stream represents a PPA:
484 * For all streams attached to the PPA, clear their
485 * references to this PPA.
486 * Then remove this PPA from the list of PPAs.
488 for (as = up->next; as != 0; as = asnext) {
492 if (as->flags & US_BLOCKED) {
493 as->flags &= ~US_BLOCKED;
494 flushq(WR(as->q), FLUSHDATA);
497 for (upp = &ppas; *upp != 0; upp = &(*upp)->nextppa)
503 /* Remove the statistics from the active list. */
504 for (ifp = ifstats, pifp = 0; ifp; ifp = ifp->ifs_next) {
505 if (ifp == &up->ifstats) {
507 pifp->ifs_next = ifp->ifs_next;
509 ifstats = ifp->ifs_next;
517 * If this stream is attached to a PPA,
518 * remove it from the PPA's list.
520 if ((as = up->ppa) != 0) {
521 for (; as->next != 0; as = as->next)
522 if (as->next == up) {
531 kstat_delete(up->kstats);
532 mutex_destroy(&up->stats_lock);
538 for (prevp = &minor_devs; *prevp != 0; prevp = &(*prevp)->nextmn) {
544 FREE(up, sizeof(upperstr_t));
551 * A message from on high. We do one of three things:
553 * - put the message on the lower write stream
554 * - queue it for our service routine
561 upperstr_t *us, *ppa, *nps;
571 struct ppp_idle *pip;
576 us = (upperstr_t *) q->q_ptr;
578 DPRINT("pppuwput: q_ptr = 0!\n");
582 DPRINT1("pppuwput/%d: mp = 0!\n", us->mn);
585 if (mp->b_datap == 0) {
586 DPRINT1("pppuwput/%d: mp->b_datap = 0!\n", us->mn);
589 switch (mp->b_datap->db_type) {
593 dlpi_request(q, mp, us);
598 if (us->flags & US_DBGLOG)
599 DPRINT3("ppp/%d: uwput M_DATA len=%d flags=%x\n",
600 us->mn, msgdsize(mp), us->flags);
601 if (us->ppa == 0 || msgdsize(mp) > us->ppa->mtu + PPP_HDRLEN
603 || (us->flags & US_CONTROL) == 0
606 DPRINT1("pppuwput: junk data len=%d\n", msgdsize(mp));
611 if ((us->flags & US_CONTROL) == 0 && !pass_packet(us, mp, 1))
614 if (!send_data(mp, us))
619 iop = (struct iocblk *) mp->b_rptr;
621 if (us->flags & US_DBGLOG)
622 DPRINT3("ppp/%d: ioctl %x count=%d\n",
623 us->mn, iop->ioc_cmd, iop->ioc_count);
624 switch (iop->ioc_cmd) {
626 if ((us->flags & US_CONTROL) == 0 || us->lowerq != 0)
628 if (mp->b_cont == 0) {
629 DPRINT1("pppuwput/%d: ioctl I_LINK b_cont = 0!\n", us->mn);
632 lb = (struct linkblk *) mp->b_cont->b_rptr;
635 DPRINT1("pppuwput/%d: ioctl I_LINK l_qbot = 0!\n", us->mn);
640 lq->q_ptr = (caddr_t) q;
641 RD(lq)->q_ptr = (caddr_t) us->q;
645 us->flags &= ~US_LASTMOD;
646 /* Unblock upper streams which now feed this lower stream. */
648 /* Send useful information down to the modules which
649 are now linked below us. */
650 putctl2(lq, M_CTL, PPPCTL_UNIT, us->ppa_id);
651 putctl4(lq, M_CTL, PPPCTL_MRU, us->mru);
652 putctl4(lq, M_CTL, PPPCTL_MTU, us->mtu);
654 /* Lower tty driver's queue hiwat/lowat from default 4096/128
655 to 256/128 since we don't want queueing of data on
656 output to physical device */
659 for (tlq = lq; tlq->q_next != NULL; tlq = tlq->q_next)
661 strqset(tlq, QHIWAT, 0, 256);
662 strqset(tlq, QLOWAT, 0, 128);
668 if (mp->b_cont == 0) {
669 DPRINT1("pppuwput/%d: ioctl I_UNLINK b_cont = 0!\n", us->mn);
672 lb = (struct linkblk *) mp->b_cont->b_rptr;
674 if (us->lowerq != lb->l_qbot) {
675 DPRINT2("ppp unlink: lowerq=%x qbot=%x\n",
676 us->lowerq, lb->l_qbot);
681 qwriter(q, mp, detach_lower, PERIM_OUTER);
686 if (us->flags & US_CONTROL)
688 if ((us->flags & US_PRIV) == 0) {
692 /* Arrange to return an int */
693 if ((mq = mp->b_cont) == 0
694 || mq->b_datap->db_lim - mq->b_rptr < sizeof(int)) {
695 mq = allocb(sizeof(int), BPRI_HI);
705 iop->ioc_count = sizeof(int);
706 mq->b_wptr = mq->b_rptr + sizeof(int);
707 qwriter(q, mp, new_ppa, PERIM_OUTER);
712 /* like dlpi_attach, for programs which can't write to
713 the stream (like pppstats) */
714 if (iop->ioc_count != sizeof(int) || us->ppa != 0)
716 if (mp->b_cont == 0) {
717 DPRINT1("pppuwput/%d: ioctl PPPIO_ATTACH b_cont = 0!\n", us->mn);
720 n = *(int *)mp->b_cont->b_rptr;
721 for (ppa = ppas; ppa != 0; ppa = ppa->nextppa)
722 if (ppa->ppa_id == n)
728 qwriter(q, mp, attach_ppa, PERIM_OUTER);
734 /* Attach to a given SAP. */
735 if (iop->ioc_count != sizeof(int) || us->ppa == 0)
737 if (mp->b_cont == 0) {
738 DPRINT1("pppuwput/%d: ioctl PPPIO_BIND b_cont = 0!\n", us->mn);
741 n = *(int *)mp->b_cont->b_rptr;
742 /* n must be a valid PPP network protocol number. */
743 if (n < 0x21 || n > 0x3fff || (n & 0x101) != 1)
745 /* check that no other stream is bound to this sap already. */
746 for (os = us->ppa; os != 0; os = os->next)
758 if (iop->ioc_count != sizeof(int) || (us->flags & US_CONTROL) == 0)
760 if (mp->b_cont == 0) {
761 DPRINT1("pppuwput/%d: ioctl PPPIO_MRU b_cont = 0!\n", us->mn);
764 n = *(int *)mp->b_cont->b_rptr;
765 if (n <= 0 || n > PPP_MAXMRU)
771 putctl4(us->lowerq, M_CTL, PPPCTL_MRU, n);
777 if (iop->ioc_count != sizeof(int) || (us->flags & US_CONTROL) == 0)
779 if (mp->b_cont == 0) {
780 DPRINT1("pppuwput/%d: ioctl PPPIO_MTU b_cont = 0!\n", us->mn);
783 n = *(int *)mp->b_cont->b_rptr;
784 if (n <= 0 || n > PPP_MAXMTU)
788 /* The MTU reported in netstat, not used as IP max packet size! */
789 us->ifstats.ifs_mtu = n;
792 putctl4(us->lowerq, M_CTL, PPPCTL_MTU, n);
798 us->flags |= US_LASTMOD;
803 if (iop->ioc_count != sizeof(int))
805 if (mp->b_cont == 0) {
806 DPRINT1("pppuwput/%d: ioctl PPPIO_DEBUG b_cont = 0!\n", us->mn);
809 n = *(int *)mp->b_cont->b_rptr;
810 if (n == PPPDBG_DUMP + PPPDBG_DRIVER) {
811 qwriter(q, NULL, debug_dump, PERIM_OUTER);
814 } else if (n == PPPDBG_LOG + PPPDBG_DRIVER) {
815 DPRINT1("ppp/%d: debug log enabled\n", us->mn);
816 us->flags |= US_DBGLOG;
820 if (us->ppa == 0 || us->ppa->lowerq == 0)
822 putnext(us->ppa->lowerq, mp);
828 if (iop->ioc_count != 2 * sizeof(int))
830 if ((us->flags & US_CONTROL) == 0)
832 if (mp->b_cont == 0) {
833 DPRINT1("pppuwput/%d: ioctl PPPIO_NPMODE b_cont = 0!\n", us->mn);
836 sap = ((int *)mp->b_cont->b_rptr)[0];
837 for (nps = us->next; nps != 0; nps = nps->next)
841 if (us->flags & US_DBGLOG)
842 DPRINT2("ppp/%d: no stream for sap %x\n", us->mn, sap);
845 /* XXX possibly should use qwriter here */
846 nps->npmode = (enum NPmode) ((int *)mp->b_cont->b_rptr)[1];
847 if (nps->npmode != NPMODE_QUEUE && (nps->flags & US_BLOCKED) != 0)
854 if ((ppa = us->ppa) == 0)
856 mq = allocb(sizeof(struct ppp_idle), BPRI_HI);
865 pip = (struct ppp_idle *) mq->b_wptr;
866 pip->xmit_idle = time - ppa->last_sent;
867 pip->recv_idle = time - ppa->last_recv;
868 mq->b_wptr += sizeof(struct ppp_idle);
869 iop->ioc_count = sizeof(struct ppp_idle);
875 /* Sent from IP down to us. Attach the ifstats structure. */
876 if (iop->ioc_count != sizeof(struct ifreq) || us->ppa == 0)
878 ifr = (struct ifreq *)mp->b_cont->b_rptr;
879 /* Find the unit number in the interface name. */
880 for (i = 0; i < IFNAMSIZ; i++) {
881 if (ifr->ifr_name[i] == 0 ||
882 (ifr->ifr_name[i] >= '0' &&
883 ifr->ifr_name[i] <= '9'))
886 us->ifname[i] = ifr->ifr_name[i];
890 /* Convert the unit number to binary. */
891 for (n = 0; i < IFNAMSIZ; i++) {
892 if (ifr->ifr_name[i] == 0) {
896 n = n * 10 + ifr->ifr_name[i] - '0';
900 /* Verify the ppa. */
901 if (us->ppa->ppa_id != n)
905 /* Set up the netstat block. */
906 strncpy (ppa->ifname, us->ifname, IFNAMSIZ);
908 ppa->ifstats.ifs_name = ppa->ifname;
909 ppa->ifstats.ifs_unit = n;
910 ppa->ifstats.ifs_active = us->state != DL_UNBOUND;
911 ppa->ifstats.ifs_mtu = ppa->mtu;
913 /* Link in statistics used by netstat. */
914 ppa->ifstats.ifs_next = ifstats;
915 ifstats = &ppa->ifstats;
922 if (!(us->flags & US_CONTROL)) {
928 ((struct iocblk_in *)iop)->ioc_ifflags = us->ifflags;
933 if (!(us->flags & US_CONTROL)) {
939 us->ifflags = ((struct iocblk_in *)iop)->ioc_ifflags;
944 if (!(us->flags & US_CONTROL)) {
950 us->ifflags |= IFF_RUNNING;
951 ((struct iocblk_in *)iop)->ioc_ifflags |= IFF_RUNNING;
957 * Vanilla SVR4 systems don't handle SIOCSIFMTU, rather
958 * they take the MTU from the DL_INFO_ACK we sent in response
959 * to their DL_INFO_REQ. Fortunately, they will update the
960 * MTU if we send an unsolicited DL_INFO_ACK up.
962 if ((mq = allocb(sizeof(dl_info_req_t), BPRI_HI)) == 0)
963 break; /* should do bufcall */
964 ((union DL_primitives *)mq->b_rptr)->dl_primitive = DL_INFO_REQ;
965 mq->b_wptr = mq->b_rptr + sizeof(dl_info_req_t);
966 dlpi_request(q, mq, us);
981 if (us->ppa == 0 || us->ppa->lowerq == 0)
983 us->ioc_id = iop->ioc_id;
985 switch (iop->ioc_cmd) {
988 if (us->flags & US_LASTMOD) {
992 putnext(us->ppa->lowerq, mp);
995 if (us->flags & US_PRIV)
996 putnext(us->ppa->lowerq, mp);
998 DPRINT1("ppp ioctl %x rejected\n", iop->ioc_cmd);
1007 iop->ioc_error = error;
1008 mp->b_datap->db_type = M_IOCNAK;
1010 } else if (error == 0) {
1011 mp->b_datap->db_type = M_IOCACK;
1017 if (us->flags & US_DBGLOG)
1018 DPRINT2("ppp/%d: flush %x\n", us->mn, *mp->b_rptr);
1019 if (*mp->b_rptr & FLUSHW)
1020 flushq(q, FLUSHDATA);
1021 if (*mp->b_rptr & FLUSHR) {
1022 *mp->b_rptr &= ~FLUSHW;
1037 dlpi_request(q, mp, us)
1042 union DL_primitives *d = (union DL_primitives *) mp->b_rptr;
1043 int size = mp->b_wptr - mp->b_rptr;
1045 upperstr_t *ppa, *os;
1047 dl_info_ack_t *info;
1048 dl_bind_ack_t *ackp;
1050 if (us->flags & US_DBGLOG)
1051 DPRINT3("ppp/%d: dlpi prim %x len=%d\n", us->mn,
1052 d->dl_primitive, size);
1053 switch (d->dl_primitive) {
1055 if (size < sizeof(dl_info_req_t))
1057 if ((reply = allocb(sizeof(dl_info_ack_t), BPRI_HI)) == 0)
1058 break; /* should do bufcall */
1059 reply->b_datap->db_type = M_PCPROTO;
1060 info = (dl_info_ack_t *) reply->b_wptr;
1061 reply->b_wptr += sizeof(dl_info_ack_t);
1062 bzero((caddr_t) info, sizeof(dl_info_ack_t));
1063 info->dl_primitive = DL_INFO_ACK;
1064 info->dl_max_sdu = us->ppa? us->ppa->mtu: PPP_MAXMTU;
1065 info->dl_min_sdu = 1;
1066 info->dl_addr_length = sizeof(uint);
1069 info->dl_mac_type = DL_OTHER;
1071 info->dl_mac_type = DL_HDLC; /* a lie */
1074 info->dl_mac_type = DL_ETHER; /* a bigger lie */
1076 info->dl_current_state = us->state;
1077 info->dl_service_mode = DL_CLDLS;
1078 info->dl_provider_style = DL_STYLE2;
1079 #if DL_CURRENT_VERSION >= 2
1080 info->dl_sap_length = sizeof(uint);
1081 info->dl_version = DL_CURRENT_VERSION;
1087 if (size < sizeof(dl_attach_req_t))
1089 if (us->state != DL_UNATTACHED || us->ppa != 0) {
1090 dlpi_error(q, us, DL_ATTACH_REQ, DL_OUTSTATE, 0);
1093 for (ppa = ppas; ppa != 0; ppa = ppa->nextppa)
1094 if (ppa->ppa_id == d->attach_req.dl_ppa)
1097 dlpi_error(q, us, DL_ATTACH_REQ, DL_BADPPA, 0);
1101 qwriter(q, mp, attach_ppa, PERIM_OUTER);
1105 if (size < sizeof(dl_detach_req_t))
1107 if (us->state != DL_UNBOUND || us->ppa == 0) {
1108 dlpi_error(q, us, DL_DETACH_REQ, DL_OUTSTATE, 0);
1111 qwriter(q, mp, detach_ppa, PERIM_OUTER);
1115 if (size < sizeof(dl_bind_req_t))
1117 if (us->state != DL_UNBOUND || us->ppa == 0) {
1118 dlpi_error(q, us, DL_BIND_REQ, DL_OUTSTATE, 0);
1122 /* apparently this test fails (unnecessarily?) on some systems */
1123 if (d->bind_req.dl_service_mode != DL_CLDLS) {
1124 dlpi_error(q, us, DL_BIND_REQ, DL_UNSUPPORTED, 0);
1129 /* saps must be valid PPP network protocol numbers,
1130 except that we accept ETHERTYPE_IP in place of PPP_IP. */
1131 sap = d->bind_req.dl_sap;
1136 * ip will send a sap value of 0 (post-Solaris 7), or
1137 * ETHERTYPE_IP (0x800) (pre-Solaris 8) due to how the
1138 * ppp DLPI provider declares its characteristics.
1139 * <adi.masputra@sun.com>
1145 if (sap == ETHERTYPE_IP)
1147 if (sap < 0x21 || sap > 0x3fff || (sap & 0x101) != 1) {
1148 dlpi_error(q, us, DL_BIND_REQ, DL_BADADDR, 0);
1152 /* check that no other stream is bound to this sap already. */
1153 for (os = us->ppa; os != 0; os = os->next)
1157 dlpi_error(q, us, DL_BIND_REQ, DL_NOADDR, 0);
1162 us->state = DL_IDLE;
1164 if ((reply = allocb(sizeof(dl_bind_ack_t) + sizeof(uint),
1166 break; /* should do bufcall */
1167 ackp = (dl_bind_ack_t *) reply->b_wptr;
1168 reply->b_wptr += sizeof(dl_bind_ack_t) + sizeof(uint);
1169 reply->b_datap->db_type = M_PCPROTO;
1170 bzero((caddr_t) ackp, sizeof(dl_bind_ack_t));
1171 ackp->dl_primitive = DL_BIND_ACK;
1173 ackp->dl_addr_length = sizeof(uint);
1174 ackp->dl_addr_offset = sizeof(dl_bind_ack_t);
1175 *(uint *)(ackp+1) = sap;
1180 if (size < sizeof(dl_unbind_req_t))
1182 if (us->state != DL_IDLE) {
1183 dlpi_error(q, us, DL_UNBIND_REQ, DL_OUTSTATE, 0);
1187 us->state = DL_UNBOUND;
1189 us->ppa->ifstats.ifs_active = 0;
1191 dlpi_ok(q, DL_UNBIND_REQ);
1194 case DL_UNITDATA_REQ:
1195 if (size < sizeof(dl_unitdata_req_t))
1197 if (us->state != DL_IDLE) {
1198 dlpi_error(q, us, DL_UNITDATA_REQ, DL_OUTSTATE, 0);
1201 if ((ppa = us->ppa) == 0) {
1202 cmn_err(CE_CONT, "ppp: in state dl_idle but ppa == 0?\n");
1205 len = mp->b_cont == 0? 0: msgdsize(mp->b_cont);
1206 if (len > ppa->mtu) {
1207 DPRINT2("dlpi data too large (%d > %d)\n", len, ppa->mtu);
1212 /* Extract s_port & d_port from IP-packet, the code is a bit
1213 dirty here, but so am I, too... */
1214 if (mp->b_datap->db_type == M_PROTO && us->sap == PPP_IP
1215 && mp->b_cont != 0) {
1219 u_char band_unset, cur_band, syn;
1220 u_short s_port, d_port;
1222 bb = mp->b_cont->b_rptr; /* bb points to IP-header*/
1223 len = mp->b_cont->b_wptr - mp->b_cont->b_rptr;
1225 s_port = IPPORT_DEFAULT;
1226 d_port = IPPORT_DEFAULT;
1227 if (len >= 20) { /* 20 = minimum length of IP header */
1228 iphlen = (bb[0] & 0x0f) * 4;
1233 if (len >= 20) { /* min length of TCP header */
1234 s_port = (tlh[0] << 8) + tlh[1];
1235 d_port = (tlh[2] << 8) + tlh[3];
1236 syn = tlh[13] & 0x02;
1240 if (len >= 8) { /* min length of UDP header */
1241 s_port = (tlh[0] << 8) + tlh[1];
1242 d_port = (tlh[2] << 8) + tlh[3];
1249 * Now calculate b_band for this packet from the
1250 * port-priority table.
1253 cur_band = max_band;
1256 while (*ptr && band_unset)
1257 if (s_port == *ptr || d_port == *ptr++) {
1258 mp->b_band = cur_band;
1266 mp->b_band = def_band;
1267 /* It may be usable to urge SYN packets a bit */
1272 /* this assumes PPP_HDRLEN <= sizeof(dl_unitdata_req_t) */
1273 if (mp->b_datap->db_ref > 1) {
1274 np = allocb(PPP_HDRLEN, BPRI_HI);
1277 np->b_cont = mp->b_cont;
1282 mp->b_datap->db_type = M_DATA;
1283 /* XXX should use dl_dest_addr_offset/length here,
1284 but we would have to translate ETHERTYPE_IP -> PPP_IP */
1285 mp->b_wptr = mp->b_rptr + PPP_HDRLEN;
1286 mp->b_rptr[0] = PPP_ALLSTATIONS;
1287 mp->b_rptr[1] = PPP_UI;
1288 mp->b_rptr[2] = us->sap >> 8;
1289 mp->b_rptr[3] = us->sap;
1290 if (pass_packet(us, mp, 1)) {
1291 if (!send_data(mp, us))
1296 #if DL_CURRENT_VERSION >= 2
1297 case DL_SUBS_BIND_REQ:
1298 case DL_SUBS_UNBIND_REQ:
1299 case DL_ENABMULTI_REQ:
1300 case DL_DISABMULTI_REQ:
1301 case DL_PROMISCON_REQ:
1302 case DL_PROMISCOFF_REQ:
1303 case DL_PHYS_ADDR_REQ:
1304 case DL_SET_PHYS_ADDR_REQ:
1307 case DL_REPLY_UPDATE_REQ:
1309 case DL_DATA_ACK_REQ:
1311 case DL_CONNECT_REQ:
1313 dlpi_error(q, us, d->dl_primitive, DL_NOTSUPPORTED, 0);
1316 case DL_CONNECT_RES:
1317 case DL_DISCONNECT_REQ:
1320 dlpi_error(q, us, d->dl_primitive, DL_OUTSTATE, 0);
1324 dlpi_error(q, us, d->dl_primitive, DL_BADQOSTYPE, 0);
1327 #if DL_CURRENT_VERSION >= 2
1334 cmn_err(CE_CONT, "ppp: unknown dlpi prim 0x%x\n", d->dl_primitive);
1337 dlpi_error(q, us, d->dl_primitive, DL_BADPRIM, 0);
1344 dlpi_error(q, us, prim, err, uerr)
1347 int prim, err, uerr;
1350 dl_error_ack_t *errp;
1352 if (us->flags & US_DBGLOG)
1353 DPRINT3("ppp/%d: dlpi error, prim=%x, err=%x\n", us->mn, prim, err);
1354 reply = allocb(sizeof(dl_error_ack_t), BPRI_HI);
1356 return; /* XXX should do bufcall */
1357 reply->b_datap->db_type = M_PCPROTO;
1358 errp = (dl_error_ack_t *) reply->b_wptr;
1359 reply->b_wptr += sizeof(dl_error_ack_t);
1360 errp->dl_primitive = DL_ERROR_ACK;
1361 errp->dl_error_primitive = prim;
1362 errp->dl_errno = err;
1363 errp->dl_unix_errno = uerr;
1375 reply = allocb(sizeof(dl_ok_ack_t), BPRI_HI);
1377 return; /* XXX should do bufcall */
1378 reply->b_datap->db_type = M_PCPROTO;
1379 okp = (dl_ok_ack_t *) reply->b_wptr;
1380 reply->b_wptr += sizeof(dl_ok_ack_t);
1381 okp->dl_primitive = DL_OK_ACK;
1382 okp->dl_correct_primitive = prim;
1385 #endif /* NO_DLPI */
1388 pass_packet(us, mp, outbound)
1396 if ((ppa = us->ppa) == 0) {
1401 #ifdef FILTER_PACKETS
1402 pass = ip_hard_filter(us, mp, outbound);
1405 * Here is where we might, in future, decide whether to pass
1406 * or drop the packet, and whether it counts as link activity.
1409 #endif /* FILTER_PACKETS */
1412 /* pass only if link already up, and don't update time */
1413 if (ppa->lowerq == 0) {
1420 ppa->last_sent = time;
1422 ppa->last_recv = time;
1429 * We have some data to send down to the lower stream (or up the
1430 * control stream, if we don't have a lower stream attached).
1431 * Returns 1 if the message was dealt with, 0 if it wasn't able
1432 * to be sent on and should therefore be queued up.
1441 if ((us->flags & US_BLOCKED) || us->npmode == NPMODE_QUEUE)
1444 if (ppa == 0 || us->npmode == NPMODE_DROP || us->npmode == NPMODE_ERROR) {
1445 if (us->flags & US_DBGLOG)
1446 DPRINT2("ppp/%d: dropping pkt (npmode=%d)\n", us->mn, us->npmode);
1450 if (ppa->lowerq == 0) {
1451 /* try to send it up the control stream */
1452 if (bcanputnext(ppa->q, mp->b_band)) {
1454 * The message seems to get corrupted for some reason if
1455 * we just send the message up as it is, so we send a copy.
1457 mblk_t *np = copymsg(mp);
1460 putnext(ppa->q, np);
1464 if (bcanputnext(ppa->lowerq, mp->b_band)) {
1465 MT_ENTER(&ppa->stats_lock);
1466 ppa->stats.ppp_opackets++;
1467 ppa->stats.ppp_obytes += msgdsize(mp);
1468 #ifdef INCR_OPACKETS
1471 MT_EXIT(&ppa->stats_lock);
1473 * The lower queue is only ever detached while holding an
1474 * exclusive lock on the whole driver. So we can be confident
1475 * that the lower queue is still there.
1477 putnext(ppa->lowerq, mp);
1481 us->flags |= US_BLOCKED;
1486 * Allocate a new PPA id and link this stream into the list of PPAs.
1487 * This procedure is called with an exclusive lock on all queues in
1495 upperstr_t *us, *up, **usp;
1498 us = (upperstr_t *) q->q_ptr;
1500 DPRINT("new_ppa: q_ptr = 0!\n");
1506 while ((up = *usp) != 0 && ppa_id == up->ppa_id) {
1510 us->ppa_id = ppa_id;
1515 us->flags |= US_CONTROL;
1516 us->npmode = NPMODE_PASS;
1523 * Create a kstats record for our statistics, so netstat -i works.
1525 if (us->kstats == 0) {
1528 sprintf(unit, "ppp%d", us->ppa->ppa_id);
1529 us->kstats = kstat_create("ppp", us->ppa->ppa_id, unit,
1530 "net", KSTAT_TYPE_NAMED, 4, 0);
1531 if (us->kstats != 0) {
1532 kstat_named_t *kn = KSTAT_NAMED_PTR(us->kstats);
1534 strcpy(kn[0].name, "ipackets");
1535 kn[0].data_type = KSTAT_DATA_ULONG;
1536 strcpy(kn[1].name, "ierrors");
1537 kn[1].data_type = KSTAT_DATA_ULONG;
1538 strcpy(kn[2].name, "opackets");
1539 kn[2].data_type = KSTAT_DATA_ULONG;
1540 strcpy(kn[3].name, "oerrors");
1541 kn[3].data_type = KSTAT_DATA_ULONG;
1542 kstat_install(us->kstats);
1547 *(int *)mp->b_cont->b_rptr = ppa_id;
1548 mp->b_datap->db_type = M_IOCACK;
1559 us = (upperstr_t *) q->q_ptr;
1561 DPRINT("attach_ppa: q_ptr = 0!\n");
1566 us->state = DL_UNBOUND;
1568 for (t = us->ppa; t->next != 0; t = t->next)
1572 if (mp->b_datap->db_type == M_IOCTL) {
1573 mp->b_datap->db_type = M_IOCACK;
1577 dlpi_ok(q, DL_ATTACH_REQ);
1589 us = (upperstr_t *) q->q_ptr;
1591 DPRINT("detach_ppa: q_ptr = 0!\n");
1595 for (t = us->ppa; t->next != 0; t = t->next)
1596 if (t->next == us) {
1603 us->state = DL_UNATTACHED;
1604 dlpi_ok(q, DL_DETACH_REQ);
1609 * We call this with qwriter in order to give the upper queue procedures
1610 * the guarantee that the lower queue is not going to go away while
1611 * they are executing.
1620 us = (upperstr_t *) q->q_ptr;
1622 DPRINT("detach_lower: q_ptr = 0!\n");
1627 us->lowerq->q_ptr = 0;
1628 RD(us->lowerq)->q_ptr = 0;
1632 /* Unblock streams which now feed back up the control stream. */
1635 mp->b_datap->db_type = M_IOCACK;
1643 upperstr_t *us, *as;
1646 us = (upperstr_t *) q->q_ptr;
1648 DPRINT("pppuwsrv: q_ptr = 0!\n");
1653 * If this is a control stream, then this service procedure
1654 * probably got enabled because of flow control in the lower
1655 * stream being enabled (or because of the lower stream going
1656 * away). Therefore we enable the service procedure of all
1657 * attached upper streams.
1659 if (us->flags & US_CONTROL) {
1660 for (as = us->next; as != 0; as = as->next)
1664 /* Try to send on any data queued here. */
1665 us->flags &= ~US_BLOCKED;
1666 while ((mp = getq(q)) != 0) {
1667 if (!send_data(mp, us)) {
1676 /* should never get called... */
1693 * Flow control has back-enabled this stream:
1694 * enable the upper write service procedure for
1695 * the upper control stream for this lower stream.
1698 uq = (queue_t *) q->q_ptr;
1706 * This should only get called for control streams.
1713 upperstr_t *ppa, *us;
1717 ppa = (upperstr_t *) q->q_ptr;
1719 DPRINT("pppurput: q_ptr = 0!\n");
1723 switch (mp->b_datap->db_type) {
1725 MT_ENTER(&ppa->stats_lock);
1726 switch (*mp->b_rptr) {
1731 ppa->stats.ppp_ierrors++;
1737 ppa->stats.ppp_oerrors++;
1740 MT_EXIT(&ppa->stats_lock);
1747 * Attempt to match up the response with the stream
1748 * that the request came from.
1750 iop = (struct iocblk *) mp->b_rptr;
1751 for (us = ppa; us != 0; us = us->next)
1752 if (us->ioc_id == iop->ioc_id)
1762 * The serial device has hung up. We don't want to send
1763 * the M_HANGUP message up to pppd because that will stop
1764 * us from using the control stream any more. Instead we
1765 * send a zero-length message as an end-of-file indication.
1768 mp = allocb(1, BPRI_HI);
1770 DPRINT1("ppp/%d: couldn't allocate eof message!\n", ppa->mn);
1773 putnext(ppa->q, mp);
1777 if (mp->b_datap->db_type == M_DATA) {
1779 if (mp->b_wptr - mp->b_rptr < PPP_HDRLEN) {
1780 PULLUP(mp, PPP_HDRLEN);
1782 DPRINT1("ppp_urput: msgpullup failed (len=%d)\n", len);
1786 MT_ENTER(&ppa->stats_lock);
1787 ppa->stats.ppp_ipackets++;
1788 ppa->stats.ppp_ibytes += len;
1789 #ifdef INCR_IPACKETS
1792 MT_EXIT(&ppa->stats_lock);
1794 proto = PPP_PROTOCOL(mp->b_rptr);
1795 if (proto < 0x8000 && (us = find_dest(ppa, proto)) != 0) {
1797 * A data packet for some network protocol.
1798 * Queue it on the upper stream for that protocol.
1799 * XXX could we just putnext it? (would require thought)
1800 * The rblocked flag is there to ensure that we keep
1801 * messages in order for each network protocol.
1803 if (!pass_packet(us, mp, 0))
1805 if (!us->rblocked && !canput(us->q))
1815 * A control frame, a frame for an unknown protocol,
1816 * or some other message type.
1817 * Send it up to pppd via the control stream.
1819 if (queclass(mp) == QPCTL || canputnext(ppa->q))
1820 putnext(ppa->q, mp);
1833 upperstr_t *us, *as;
1836 dl_unitdata_ind_t *ud;
1840 us = (upperstr_t *) q->q_ptr;
1842 DPRINT("pppursrv: q_ptr = 0!\n");
1846 if (us->flags & US_CONTROL) {
1849 * If there is no lower queue attached, run the write service
1850 * routines of other upper streams attached to this PPA.
1852 if (us->lowerq == 0) {
1855 if (as->flags & US_BLOCKED)
1862 * Messages get queued on this stream's read queue if they
1863 * can't be queued on the read queue of the attached stream
1864 * that they are destined for. This is for flow control -
1865 * when this queue fills up, the lower read put procedure will
1866 * queue messages there and the flow control will propagate
1869 while ((mp = getq(q)) != 0) {
1870 proto = PPP_PROTOCOL(mp->b_rptr);
1871 if (proto < 0x8000 && (as = find_dest(us, proto)) != 0) {
1884 /* can now put stuff directly on network protocol streams again */
1885 for (as = us->next; as != 0; as = as->next)
1890 * If this stream has a lower stream attached,
1891 * enable the read queue's service routine.
1892 * XXX we should really only do this if the queue length
1893 * has dropped below the low-water mark.
1895 if (us->lowerq != 0)
1896 qenable(RD(us->lowerq));
1900 * A network protocol stream. Put a DLPI header on each
1901 * packet and send it on.
1902 * (Actually, it seems that the IP module will happily
1903 * accept M_DATA messages without the DL_UNITDATA_IND header.)
1905 while ((mp = getq(q)) != 0) {
1906 if (!canputnext(q)) {
1911 proto = PPP_PROTOCOL(mp->b_rptr);
1912 mp->b_rptr += PPP_HDRLEN;
1913 hdr = allocb(sizeof(dl_unitdata_ind_t) + 2 * sizeof(uint),
1916 /* XXX should put it back and use bufcall */
1920 hdr->b_datap->db_type = M_PROTO;
1921 ud = (dl_unitdata_ind_t *) hdr->b_wptr;
1922 hdr->b_wptr += sizeof(dl_unitdata_ind_t) + 2 * sizeof(uint);
1924 ud->dl_primitive = DL_UNITDATA_IND;
1925 ud->dl_dest_addr_length = sizeof(uint);
1926 ud->dl_dest_addr_offset = sizeof(dl_unitdata_ind_t);
1927 ud->dl_src_addr_length = sizeof(uint);
1928 ud->dl_src_addr_offset = ud->dl_dest_addr_offset + sizeof(uint);
1929 #if DL_CURRENT_VERSION >= 2
1930 ud->dl_group_address = 0;
1932 /* Send the DLPI client the data with the SAP they requested,
1933 (e.g. ETHERTYPE_IP) rather than the PPP protocol number
1935 ((uint *)(ud + 1))[0] = us->req_sap; /* dest SAP */
1936 ((uint *)(ud + 1))[1] = us->req_sap; /* src SAP */
1940 #endif /* NO_DLPI */
1943 * Now that we have consumed some packets from this queue,
1944 * enable the control stream's read service routine so that we
1945 * can process any packets for us that might have got queued
1946 * there for flow control reasons.
1949 qenable(us->ppa->q);
1956 find_dest(ppa, proto)
1962 for (us = ppa->next; us != 0; us = us->next)
1963 if (proto == us->sap)
1969 * We simply put the message on to the associated upper control stream
1970 * (either here or in ppplrsrv). That way we enter the perimeters
1971 * before looking through the list of attached streams to decide which
1972 * stream it should go up.
1982 switch (mp->b_datap->db_type) {
1984 iop = (struct iocblk *) mp->b_rptr;
1985 iop->ioc_error = EINVAL;
1986 mp->b_datap->db_type = M_IOCNAK;
1990 if (*mp->b_rptr & FLUSHR)
1991 flushq(q, FLUSHDATA);
1992 if (*mp->b_rptr & FLUSHW) {
1993 *mp->b_rptr &= ~FLUSHR;
2001 * If we can't get the lower lock straight away, queue this one
2002 * rather than blocking, to avoid the possibility of deadlock.
2004 if (!TRYLOCK_LOWER_R) {
2010 * Check that we're still connected to the driver.
2012 uq = (queue_t *) q->q_ptr;
2015 DPRINT1("ppplrput: q = %x, uq = 0??\n", q);
2021 * Try to forward the message to the put routine for the upper
2022 * control stream for this lower stream.
2023 * If there are already messages queued here, queue this one so
2024 * they don't get out of order.
2026 if (queclass(mp) == QPCTL || (qsize(q) == 0 && canput(uq)))
2043 * Packets get queued here for flow control reasons
2044 * or if the lrput routine couldn't get the lower lock
2048 uq = (queue_t *) q->q_ptr;
2051 flushq(q, FLUSHALL);
2052 DPRINT1("ppplrsrv: q = %x, uq = 0??\n", q);
2055 while ((mp = getq(q)) != 0) {
2056 if (queclass(mp) == QPCTL || canput(uq))
2068 putctl2(q, type, code, val)
2070 int type, code, val;
2074 mp = allocb(2, BPRI_HI);
2077 mp->b_datap->db_type = type;
2078 mp->b_wptr[0] = code;
2079 mp->b_wptr[1] = val;
2086 putctl4(q, type, code, val)
2088 int type, code, val;
2092 mp = allocb(4, BPRI_HI);
2095 mp->b_datap->db_type = type;
2096 mp->b_wptr[0] = code;
2097 ((short *)mp->b_wptr)[1] = val;
2111 DPRINT("ppp upper streams:\n");
2112 for (us = minor_devs; us != 0; us = us->nextmn) {
2114 DPRINT3(" %d: q=%x rlev=%d",
2115 us->mn, uq, (uq? qsize(uq): 0));
2116 DPRINT3(" wlev=%d flags=0x%b", (uq? qsize(WR(uq)): 0),
2117 us->flags, "\020\1priv\2control\3blocked\4last");
2118 DPRINT3(" state=%x sap=%x req_sap=%x", us->state, us->sap,
2123 DPRINT1(" ppa=%d\n", us->ppa->ppa_id);
2124 if (us->flags & US_CONTROL) {
2126 DPRINT3(" control for %d lq=%x rlev=%d",
2127 us->ppa_id, lq, (lq? qsize(RD(lq)): 0));
2128 DPRINT3(" wlev=%d mru=%d mtu=%d\n",
2129 (lq? qsize(lq): 0), us->mru, us->mtu);
2132 mp->b_datap->db_type = M_IOCACK;
2136 #ifdef FILTER_PACKETS
2137 #include <netinet/in_systm.h>
2138 #include <netinet/ip.h>
2139 #include <netinet/udp.h>
2140 #include <netinet/tcp.h>
2142 #define MAX_IPHDR 128 /* max TCP/IP header size */
2145 /* The following table contains a hard-coded list of protocol/port pairs.
2146 * Any matching packets are either discarded unconditionally, or,
2147 * if ok_if_link_up is non-zero when a connection does not currently exist
2148 * (i.e., they go through if the connection is present, but never initiate
2150 * This idea came from a post by dm@garage.uun.org (David Mazieres)
2152 static struct pktfilt_tab {
2155 u_short ok_if_link_up;
2157 { IPPROTO_UDP, 520, 1 }, /* RIP, ok to pass if link is up */
2158 { IPPROTO_UDP, 123, 1 }, /* NTP, don't keep up the link for it */
2159 { -1, 0, 0 } /* terminator entry has port == -1 */
2164 ip_hard_filter(us, mp, outbound)
2170 struct pktfilt_tab *pft;
2176 /* Note, the PPP header has already been pulled up in all cases */
2177 proto = PPP_PROTOCOL(mp->b_rptr);
2178 if (us->flags & US_DBGLOG)
2179 DPRINT3("ppp/%d: filter, proto=0x%x, out=%d\n", us->mn, proto, outbound);
2184 if ((mp->b_wptr - mp->b_rptr) == PPP_HDRLEN && mp->b_cont != 0) {
2185 temp_mp = mp->b_cont;
2186 len = msgdsize(temp_mp);
2187 hlen = (len < MAX_IPHDR) ? len : MAX_IPHDR;
2188 PULLUP(temp_mp, hlen);
2190 DPRINT2("ppp/%d: filter, pullup next failed, len=%d\n",
2192 mp->b_cont = 0; /* PULLUP() freed the rest */
2196 ip = (struct ip *)mp->b_cont->b_rptr;
2200 hlen = (len < (PPP_HDRLEN+MAX_IPHDR)) ? len : (PPP_HDRLEN+MAX_IPHDR);
2203 DPRINT2("ppp/%d: filter, pullup failed, len=%d\n",
2207 ip = (struct ip *)(mp->b_rptr + PPP_HDRLEN);
2210 /* For IP traffic, certain packets (e.g., RIP) may be either
2211 * 1. ignored - dropped completely
2212 * 2. will not initiate a connection, but
2213 * will be passed if a connection is currently up.
2215 for (pft=pktfilt_tab; pft->proto != -1; pft++) {
2216 if (ip->ip_p == pft->proto) {
2217 switch(pft->proto) {
2219 if (((struct udphdr *) &((int *)ip)[ip->ip_hl])->uh_dport
2220 == htons(pft->port)) goto endfor;
2223 if (((struct tcphdr *) &((int *)ip)[ip->ip_hl])->th_dport
2224 == htons(pft->port)) goto endfor;
2230 if (pft->proto != -1) {
2231 if (us->flags & US_DBGLOG)
2232 DPRINT3("ppp/%d: found IP pkt, proto=0x%x (%d)\n",
2233 us->mn, pft->proto, pft->port);
2234 /* Discard if not connected, or if not pass_with_link_up */
2235 /* else, if link is up let go by, but don't update time */
2236 return pft->ok_if_link_up? -1: 0;
2239 } /* end switch (proto) */
2243 #endif /* FILTER_PACKETS */