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 1.22 1999/09/17 05:59:00 paulus 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;
579 us = (upperstr_t *) q->q_ptr;
581 DPRINT("pppuwput: q_ptr = 0!\n");
585 DPRINT1("pppuwput/%d: mp = 0!\n", us->mn);
588 if (mp->b_datap == 0) {
589 DPRINT1("pppuwput/%d: mp->b_datap = 0!\n", us->mn);
592 switch (mp->b_datap->db_type) {
596 dlpi_request(q, mp, us);
601 if (us->flags & US_DBGLOG)
602 DPRINT3("ppp/%d: uwput M_DATA len=%d flags=%x\n",
603 us->mn, msgdsize(mp), us->flags);
604 if (us->ppa == 0 || msgdsize(mp) > us->ppa->mtu + PPP_HDRLEN
606 || (us->flags & US_CONTROL) == 0
609 DPRINT1("pppuwput: junk data len=%d\n", msgdsize(mp));
614 if ((us->flags & US_CONTROL) == 0 && !pass_packet(us, mp, 1))
617 if (!send_data(mp, us))
622 iop = (struct iocblk *) mp->b_rptr;
624 if (us->flags & US_DBGLOG)
625 DPRINT3("ppp/%d: ioctl %x count=%d\n",
626 us->mn, iop->ioc_cmd, iop->ioc_count);
627 switch (iop->ioc_cmd) {
629 if ((us->flags & US_CONTROL) == 0 || us->lowerq != 0)
631 if (mp->b_cont == 0) {
632 DPRINT1("pppuwput/%d: ioctl I_LINK b_cont = 0!\n", us->mn);
635 lb = (struct linkblk *) mp->b_cont->b_rptr;
638 DPRINT1("pppuwput/%d: ioctl I_LINK l_qbot = 0!\n", us->mn);
643 lq->q_ptr = (caddr_t) q;
644 RD(lq)->q_ptr = (caddr_t) us->q;
648 us->flags &= ~US_LASTMOD;
649 /* Unblock upper streams which now feed this lower stream. */
651 /* Send useful information down to the modules which
652 are now linked below us. */
653 putctl2(lq, M_CTL, PPPCTL_UNIT, us->ppa_id);
654 putctl4(lq, M_CTL, PPPCTL_MRU, us->mru);
655 putctl4(lq, M_CTL, PPPCTL_MTU, us->mtu);
657 /* Lower tty driver's queue hiwat/lowat from default 4096/128
658 to 256/128 since we don't want queueing of data on
659 output to physical device */
662 for (tlq = lq; tlq->q_next != NULL; tlq = tlq->q_next)
664 strqset(tlq, QHIWAT, 0, 256);
665 strqset(tlq, QLOWAT, 0, 128);
671 if (mp->b_cont == 0) {
672 DPRINT1("pppuwput/%d: ioctl I_UNLINK b_cont = 0!\n", us->mn);
675 lb = (struct linkblk *) mp->b_cont->b_rptr;
677 if (us->lowerq != lb->l_qbot) {
678 DPRINT2("ppp unlink: lowerq=%x qbot=%x\n",
679 us->lowerq, lb->l_qbot);
684 qwriter(q, mp, detach_lower, PERIM_OUTER);
689 if (us->flags & US_CONTROL)
691 if ((us->flags & US_PRIV) == 0) {
695 /* Arrange to return an int */
696 if ((mq = mp->b_cont) == 0
697 || mq->b_datap->db_lim - mq->b_rptr < sizeof(int)) {
698 mq = allocb(sizeof(int), BPRI_HI);
708 iop->ioc_count = sizeof(int);
709 mq->b_wptr = mq->b_rptr + sizeof(int);
710 qwriter(q, mp, new_ppa, PERIM_OUTER);
715 /* like dlpi_attach, for programs which can't write to
716 the stream (like pppstats) */
717 if (iop->ioc_count != sizeof(int) || us->ppa != 0)
719 if (mp->b_cont == 0) {
720 DPRINT1("pppuwput/%d: ioctl PPPIO_ATTACH b_cont = 0!\n", us->mn);
723 n = *(int *)mp->b_cont->b_rptr;
724 for (ppa = ppas; ppa != 0; ppa = ppa->nextppa)
725 if (ppa->ppa_id == n)
731 qwriter(q, mp, attach_ppa, PERIM_OUTER);
737 /* Attach to a given SAP. */
738 if (iop->ioc_count != sizeof(int) || us->ppa == 0)
740 if (mp->b_cont == 0) {
741 DPRINT1("pppuwput/%d: ioctl PPPIO_BIND b_cont = 0!\n", us->mn);
744 n = *(int *)mp->b_cont->b_rptr;
745 /* n must be a valid PPP network protocol number. */
746 if (n < 0x21 || n > 0x3fff || (n & 0x101) != 1)
748 /* check that no other stream is bound to this sap already. */
749 for (os = us->ppa; os != 0; os = os->next)
761 if (iop->ioc_count != sizeof(int) || (us->flags & US_CONTROL) == 0)
763 if (mp->b_cont == 0) {
764 DPRINT1("pppuwput/%d: ioctl PPPIO_MRU b_cont = 0!\n", us->mn);
767 n = *(int *)mp->b_cont->b_rptr;
768 if (n <= 0 || n > PPP_MAXMRU)
774 putctl4(us->lowerq, M_CTL, PPPCTL_MRU, n);
780 if (iop->ioc_count != sizeof(int) || (us->flags & US_CONTROL) == 0)
782 if (mp->b_cont == 0) {
783 DPRINT1("pppuwput/%d: ioctl PPPIO_MTU b_cont = 0!\n", us->mn);
786 n = *(int *)mp->b_cont->b_rptr;
787 if (n <= 0 || n > PPP_MAXMTU)
791 /* The MTU reported in netstat, not used as IP max packet size! */
792 us->ifstats.ifs_mtu = n;
795 putctl4(us->lowerq, M_CTL, PPPCTL_MTU, n);
801 us->flags |= US_LASTMOD;
806 if (iop->ioc_count != sizeof(int))
808 if (mp->b_cont == 0) {
809 DPRINT1("pppuwput/%d: ioctl PPPIO_DEBUG b_cont = 0!\n", us->mn);
812 n = *(int *)mp->b_cont->b_rptr;
813 if (n == PPPDBG_DUMP + PPPDBG_DRIVER) {
814 qwriter(q, NULL, debug_dump, PERIM_OUTER);
817 } else if (n == PPPDBG_LOG + PPPDBG_DRIVER) {
818 DPRINT1("ppp/%d: debug log enabled\n", us->mn);
819 us->flags |= US_DBGLOG;
823 if (us->ppa == 0 || us->ppa->lowerq == 0)
825 putnext(us->ppa->lowerq, mp);
831 if (iop->ioc_count != 2 * sizeof(int))
833 if ((us->flags & US_CONTROL) == 0)
835 if (mp->b_cont == 0) {
836 DPRINT1("pppuwput/%d: ioctl PPPIO_NPMODE b_cont = 0!\n", us->mn);
839 sap = ((int *)mp->b_cont->b_rptr)[0];
840 for (nps = us->next; nps != 0; nps = nps->next)
844 if (us->flags & US_DBGLOG)
845 DPRINT2("ppp/%d: no stream for sap %x\n", us->mn, sap);
848 /* XXX possibly should use qwriter here */
849 nps->npmode = (enum NPmode) ((int *)mp->b_cont->b_rptr)[1];
850 if (nps->npmode != NPMODE_QUEUE && (nps->flags & US_BLOCKED) != 0)
857 if ((ppa = us->ppa) == 0)
859 mq = allocb(sizeof(struct ppp_idle), BPRI_HI);
868 pip = (struct ppp_idle *) mq->b_wptr;
869 pip->xmit_idle = time - ppa->last_sent;
870 pip->recv_idle = time - ppa->last_recv;
871 mq->b_wptr += sizeof(struct ppp_idle);
872 iop->ioc_count = sizeof(struct ppp_idle);
878 /* Sent from IP down to us. Attach the ifstats structure. */
879 if (iop->ioc_count != sizeof(struct ifreq) || us->ppa == 0)
881 ifr = (struct ifreq *)mp->b_cont->b_rptr;
882 /* Find the unit number in the interface name. */
883 for (i = 0; i < IFNAMSIZ; i++) {
884 if (ifr->ifr_name[i] == 0 ||
885 (ifr->ifr_name[i] >= '0' &&
886 ifr->ifr_name[i] <= '9'))
889 us->ifname[i] = ifr->ifr_name[i];
893 /* Convert the unit number to binary. */
894 for (n = 0; i < IFNAMSIZ; i++) {
895 if (ifr->ifr_name[i] == 0) {
899 n = n * 10 + ifr->ifr_name[i] - '0';
903 /* Verify the ppa. */
904 if (us->ppa->ppa_id != n)
908 /* Set up the netstat block. */
909 strncpy (ppa->ifname, us->ifname, IFNAMSIZ);
911 ppa->ifstats.ifs_name = ppa->ifname;
912 ppa->ifstats.ifs_unit = n;
913 ppa->ifstats.ifs_active = us->state != DL_UNBOUND;
914 ppa->ifstats.ifs_mtu = ppa->mtu;
916 /* Link in statistics used by netstat. */
917 ppa->ifstats.ifs_next = ifstats;
918 ifstats = &ppa->ifstats;
925 if (!(us->flags & US_CONTROL)) {
931 ((struct iocblk_in *)iop)->ioc_ifflags = us->ifflags;
936 if (!(us->flags & US_CONTROL)) {
942 us->ifflags = ((struct iocblk_in *)iop)->ioc_ifflags;
947 if (!(us->flags & US_CONTROL)) {
953 us->ifflags |= IFF_RUNNING;
954 ((struct iocblk_in *)iop)->ioc_ifflags |= IFF_RUNNING;
960 * Vanilla SVR4 systems don't handle SIOCSIFMTU, rather
961 * they take the MTU from the DL_INFO_ACK we sent in response
962 * to their DL_INFO_REQ. Fortunately, they will update the
963 * MTU if we send an unsolicited DL_INFO_ACK up.
965 if ((mq = allocb(sizeof(dl_info_req_t), BPRI_HI)) == 0)
966 break; /* should do bufcall */
967 ((union DL_primitives *)mq->b_rptr)->dl_primitive = DL_INFO_REQ;
968 mq->b_wptr = mq->b_rptr + sizeof(dl_info_req_t);
969 dlpi_request(q, mq, us);
984 if (us->ppa == 0 || us->ppa->lowerq == 0)
986 us->ioc_id = iop->ioc_id;
988 switch (iop->ioc_cmd) {
991 if (us->flags & US_LASTMOD) {
995 putnext(us->ppa->lowerq, mp);
998 if (us->flags & US_PRIV)
999 putnext(us->ppa->lowerq, mp);
1001 DPRINT1("ppp ioctl %x rejected\n", iop->ioc_cmd);
1010 iop->ioc_error = error;
1011 mp->b_datap->db_type = M_IOCNAK;
1013 } else if (error == 0) {
1014 mp->b_datap->db_type = M_IOCACK;
1020 if (us->flags & US_DBGLOG)
1021 DPRINT2("ppp/%d: flush %x\n", us->mn, *mp->b_rptr);
1022 if (*mp->b_rptr & FLUSHW)
1023 flushq(q, FLUSHDATA);
1024 if (*mp->b_rptr & FLUSHR) {
1025 *mp->b_rptr &= ~FLUSHW;
1040 dlpi_request(q, mp, us)
1045 union DL_primitives *d = (union DL_primitives *) mp->b_rptr;
1046 int size = mp->b_wptr - mp->b_rptr;
1048 upperstr_t *ppa, *os;
1050 dl_info_ack_t *info;
1051 dl_bind_ack_t *ackp;
1053 if (us->flags & US_DBGLOG)
1054 DPRINT3("ppp/%d: dlpi prim %x len=%d\n", us->mn,
1055 d->dl_primitive, size);
1056 switch (d->dl_primitive) {
1058 if (size < sizeof(dl_info_req_t))
1060 if ((reply = allocb(sizeof(dl_info_ack_t), BPRI_HI)) == 0)
1061 break; /* should do bufcall */
1062 reply->b_datap->db_type = M_PCPROTO;
1063 info = (dl_info_ack_t *) reply->b_wptr;
1064 reply->b_wptr += sizeof(dl_info_ack_t);
1065 bzero((caddr_t) info, sizeof(dl_info_ack_t));
1066 info->dl_primitive = DL_INFO_ACK;
1067 info->dl_max_sdu = us->ppa? us->ppa->mtu: PPP_MAXMTU;
1068 info->dl_min_sdu = 1;
1069 info->dl_addr_length = sizeof(uint);
1072 info->dl_mac_type = DL_OTHER;
1074 info->dl_mac_type = DL_HDLC; /* a lie */
1077 info->dl_mac_type = DL_ETHER; /* a bigger lie */
1079 info->dl_current_state = us->state;
1080 info->dl_service_mode = DL_CLDLS;
1081 info->dl_provider_style = DL_STYLE2;
1082 #if DL_CURRENT_VERSION >= 2
1083 info->dl_sap_length = sizeof(uint);
1084 info->dl_version = DL_CURRENT_VERSION;
1090 if (size < sizeof(dl_attach_req_t))
1092 if (us->state != DL_UNATTACHED || us->ppa != 0) {
1093 dlpi_error(q, us, DL_ATTACH_REQ, DL_OUTSTATE, 0);
1096 for (ppa = ppas; ppa != 0; ppa = ppa->nextppa)
1097 if (ppa->ppa_id == d->attach_req.dl_ppa)
1100 dlpi_error(q, us, DL_ATTACH_REQ, DL_BADPPA, 0);
1104 qwriter(q, mp, attach_ppa, PERIM_OUTER);
1108 if (size < sizeof(dl_detach_req_t))
1110 if (us->state != DL_UNBOUND || us->ppa == 0) {
1111 dlpi_error(q, us, DL_DETACH_REQ, DL_OUTSTATE, 0);
1114 qwriter(q, mp, detach_ppa, PERIM_OUTER);
1118 if (size < sizeof(dl_bind_req_t))
1120 if (us->state != DL_UNBOUND || us->ppa == 0) {
1121 dlpi_error(q, us, DL_BIND_REQ, DL_OUTSTATE, 0);
1125 /* apparently this test fails (unnecessarily?) on some systems */
1126 if (d->bind_req.dl_service_mode != DL_CLDLS) {
1127 dlpi_error(q, us, DL_BIND_REQ, DL_UNSUPPORTED, 0);
1132 /* saps must be valid PPP network protocol numbers,
1133 except that we accept ETHERTYPE_IP in place of PPP_IP. */
1134 sap = d->bind_req.dl_sap;
1139 * ip will send a sap value of 0 (post-Solaris 7), or
1140 * ETHERTYPE_IP (0x800) (pre-Solaris 8) due to how the
1141 * ppp DLPI provider declares its characteristics.
1142 * <adi.masputra@sun.com>
1148 if (sap == ETHERTYPE_IP)
1150 if (sap < 0x21 || sap > 0x3fff || (sap & 0x101) != 1) {
1151 dlpi_error(q, us, DL_BIND_REQ, DL_BADADDR, 0);
1155 /* check that no other stream is bound to this sap already. */
1156 for (os = us->ppa; os != 0; os = os->next)
1160 dlpi_error(q, us, DL_BIND_REQ, DL_NOADDR, 0);
1165 us->state = DL_IDLE;
1167 if ((reply = allocb(sizeof(dl_bind_ack_t) + sizeof(uint),
1169 break; /* should do bufcall */
1170 ackp = (dl_bind_ack_t *) reply->b_wptr;
1171 reply->b_wptr += sizeof(dl_bind_ack_t) + sizeof(uint);
1172 reply->b_datap->db_type = M_PCPROTO;
1173 bzero((caddr_t) ackp, sizeof(dl_bind_ack_t));
1174 ackp->dl_primitive = DL_BIND_ACK;
1176 ackp->dl_addr_length = sizeof(uint);
1177 ackp->dl_addr_offset = sizeof(dl_bind_ack_t);
1178 *(uint *)(ackp+1) = sap;
1183 if (size < sizeof(dl_unbind_req_t))
1185 if (us->state != DL_IDLE) {
1186 dlpi_error(q, us, DL_UNBIND_REQ, DL_OUTSTATE, 0);
1190 us->state = DL_UNBOUND;
1192 us->ppa->ifstats.ifs_active = 0;
1194 dlpi_ok(q, DL_UNBIND_REQ);
1197 case DL_UNITDATA_REQ:
1198 if (size < sizeof(dl_unitdata_req_t))
1200 if (us->state != DL_IDLE) {
1201 dlpi_error(q, us, DL_UNITDATA_REQ, DL_OUTSTATE, 0);
1204 if ((ppa = us->ppa) == 0) {
1205 cmn_err(CE_CONT, "ppp: in state dl_idle but ppa == 0?\n");
1208 len = mp->b_cont == 0? 0: msgdsize(mp->b_cont);
1209 if (len > ppa->mtu) {
1210 DPRINT2("dlpi data too large (%d > %d)\n", len, ppa->mtu);
1215 /* Extract s_port & d_port from IP-packet, the code is a bit
1216 dirty here, but so am I, too... */
1217 if (mp->b_datap->db_type == M_PROTO && us->sap == PPP_IP
1218 && mp->b_cont != 0) {
1222 u_char band_unset, cur_band, syn;
1223 u_short s_port, d_port;
1225 bb = mp->b_cont->b_rptr; /* bb points to IP-header*/
1226 len = mp->b_cont->b_wptr - mp->b_cont->b_rptr;
1228 s_port = IPPORT_DEFAULT;
1229 d_port = IPPORT_DEFAULT;
1230 if (len >= 20) { /* 20 = minimum length of IP header */
1231 iphlen = (bb[0] & 0x0f) * 4;
1236 if (len >= 20) { /* min length of TCP header */
1237 s_port = (tlh[0] << 8) + tlh[1];
1238 d_port = (tlh[2] << 8) + tlh[3];
1239 syn = tlh[13] & 0x02;
1243 if (len >= 8) { /* min length of UDP header */
1244 s_port = (tlh[0] << 8) + tlh[1];
1245 d_port = (tlh[2] << 8) + tlh[3];
1252 * Now calculate b_band for this packet from the
1253 * port-priority table.
1256 cur_band = max_band;
1259 while (*ptr && band_unset)
1260 if (s_port == *ptr || d_port == *ptr++) {
1261 mp->b_band = cur_band;
1269 mp->b_band = def_band;
1270 /* It may be usable to urge SYN packets a bit */
1275 /* this assumes PPP_HDRLEN <= sizeof(dl_unitdata_req_t) */
1276 if (mp->b_datap->db_ref > 1) {
1277 np = allocb(PPP_HDRLEN, BPRI_HI);
1280 np->b_cont = mp->b_cont;
1285 mp->b_datap->db_type = M_DATA;
1286 /* XXX should use dl_dest_addr_offset/length here,
1287 but we would have to translate ETHERTYPE_IP -> PPP_IP */
1288 mp->b_wptr = mp->b_rptr + PPP_HDRLEN;
1289 mp->b_rptr[0] = PPP_ALLSTATIONS;
1290 mp->b_rptr[1] = PPP_UI;
1291 mp->b_rptr[2] = us->sap >> 8;
1292 mp->b_rptr[3] = us->sap;
1293 if (pass_packet(us, mp, 1)) {
1294 if (!send_data(mp, us))
1299 #if DL_CURRENT_VERSION >= 2
1300 case DL_SUBS_BIND_REQ:
1301 case DL_SUBS_UNBIND_REQ:
1302 case DL_ENABMULTI_REQ:
1303 case DL_DISABMULTI_REQ:
1304 case DL_PROMISCON_REQ:
1305 case DL_PROMISCOFF_REQ:
1306 case DL_PHYS_ADDR_REQ:
1307 case DL_SET_PHYS_ADDR_REQ:
1310 case DL_REPLY_UPDATE_REQ:
1312 case DL_DATA_ACK_REQ:
1314 case DL_CONNECT_REQ:
1316 dlpi_error(q, us, d->dl_primitive, DL_NOTSUPPORTED, 0);
1319 case DL_CONNECT_RES:
1320 case DL_DISCONNECT_REQ:
1323 dlpi_error(q, us, d->dl_primitive, DL_OUTSTATE, 0);
1327 dlpi_error(q, us, d->dl_primitive, DL_BADQOSTYPE, 0);
1330 #if DL_CURRENT_VERSION >= 2
1337 cmn_err(CE_CONT, "ppp: unknown dlpi prim 0x%x\n", d->dl_primitive);
1340 dlpi_error(q, us, d->dl_primitive, DL_BADPRIM, 0);
1347 dlpi_error(q, us, prim, err, uerr)
1350 int prim, err, uerr;
1353 dl_error_ack_t *errp;
1355 if (us->flags & US_DBGLOG)
1356 DPRINT3("ppp/%d: dlpi error, prim=%x, err=%x\n", us->mn, prim, err);
1357 reply = allocb(sizeof(dl_error_ack_t), BPRI_HI);
1359 return; /* XXX should do bufcall */
1360 reply->b_datap->db_type = M_PCPROTO;
1361 errp = (dl_error_ack_t *) reply->b_wptr;
1362 reply->b_wptr += sizeof(dl_error_ack_t);
1363 errp->dl_primitive = DL_ERROR_ACK;
1364 errp->dl_error_primitive = prim;
1365 errp->dl_errno = err;
1366 errp->dl_unix_errno = uerr;
1378 reply = allocb(sizeof(dl_ok_ack_t), BPRI_HI);
1380 return; /* XXX should do bufcall */
1381 reply->b_datap->db_type = M_PCPROTO;
1382 okp = (dl_ok_ack_t *) reply->b_wptr;
1383 reply->b_wptr += sizeof(dl_ok_ack_t);
1384 okp->dl_primitive = DL_OK_ACK;
1385 okp->dl_correct_primitive = prim;
1388 #endif /* NO_DLPI */
1391 pass_packet(us, mp, outbound)
1399 if ((ppa = us->ppa) == 0) {
1404 #ifdef FILTER_PACKETS
1405 pass = ip_hard_filter(us, mp, outbound);
1408 * Here is where we might, in future, decide whether to pass
1409 * or drop the packet, and whether it counts as link activity.
1412 #endif /* FILTER_PACKETS */
1415 /* pass only if link already up, and don't update time */
1416 if (ppa->lowerq == 0) {
1423 ppa->last_sent = time;
1425 ppa->last_recv = time;
1432 * We have some data to send down to the lower stream (or up the
1433 * control stream, if we don't have a lower stream attached).
1434 * Returns 1 if the message was dealt with, 0 if it wasn't able
1435 * to be sent on and should therefore be queued up.
1444 if ((us->flags & US_BLOCKED) || us->npmode == NPMODE_QUEUE)
1447 if (ppa == 0 || us->npmode == NPMODE_DROP || us->npmode == NPMODE_ERROR) {
1448 if (us->flags & US_DBGLOG)
1449 DPRINT2("ppp/%d: dropping pkt (npmode=%d)\n", us->mn, us->npmode);
1453 if (ppa->lowerq == 0) {
1454 /* try to send it up the control stream */
1455 if (bcanputnext(ppa->q, mp->b_band)) {
1457 * The message seems to get corrupted for some reason if
1458 * we just send the message up as it is, so we send a copy.
1460 mblk_t *np = copymsg(mp);
1463 putnext(ppa->q, np);
1467 if (bcanputnext(ppa->lowerq, mp->b_band)) {
1468 MT_ENTER(&ppa->stats_lock);
1469 ppa->stats.ppp_opackets++;
1470 ppa->stats.ppp_obytes += msgdsize(mp);
1471 #ifdef INCR_OPACKETS
1474 MT_EXIT(&ppa->stats_lock);
1476 * The lower queue is only ever detached while holding an
1477 * exclusive lock on the whole driver. So we can be confident
1478 * that the lower queue is still there.
1480 putnext(ppa->lowerq, mp);
1484 us->flags |= US_BLOCKED;
1489 * Allocate a new PPA id and link this stream into the list of PPAs.
1490 * This procedure is called with an exclusive lock on all queues in
1498 upperstr_t *us, *up, **usp;
1501 us = (upperstr_t *) q->q_ptr;
1503 DPRINT("new_ppa: q_ptr = 0!\n");
1509 while ((up = *usp) != 0 && ppa_id == up->ppa_id) {
1513 us->ppa_id = ppa_id;
1518 us->flags |= US_CONTROL;
1519 us->npmode = NPMODE_PASS;
1526 * Create a kstats record for our statistics, so netstat -i works.
1528 if (us->kstats == 0) {
1531 sprintf(unit, "ppp%d", us->ppa->ppa_id);
1532 us->kstats = kstat_create("ppp", us->ppa->ppa_id, unit,
1533 "net", KSTAT_TYPE_NAMED, 4, 0);
1534 if (us->kstats != 0) {
1535 kstat_named_t *kn = KSTAT_NAMED_PTR(us->kstats);
1537 strcpy(kn[0].name, "ipackets");
1538 kn[0].data_type = KSTAT_DATA_ULONG;
1539 strcpy(kn[1].name, "ierrors");
1540 kn[1].data_type = KSTAT_DATA_ULONG;
1541 strcpy(kn[2].name, "opackets");
1542 kn[2].data_type = KSTAT_DATA_ULONG;
1543 strcpy(kn[3].name, "oerrors");
1544 kn[3].data_type = KSTAT_DATA_ULONG;
1545 kstat_install(us->kstats);
1550 *(int *)mp->b_cont->b_rptr = ppa_id;
1551 mp->b_datap->db_type = M_IOCACK;
1562 us = (upperstr_t *) q->q_ptr;
1564 DPRINT("attach_ppa: q_ptr = 0!\n");
1569 us->state = DL_UNBOUND;
1571 for (t = us->ppa; t->next != 0; t = t->next)
1575 if (mp->b_datap->db_type == M_IOCTL) {
1576 mp->b_datap->db_type = M_IOCACK;
1580 dlpi_ok(q, DL_ATTACH_REQ);
1592 us = (upperstr_t *) q->q_ptr;
1594 DPRINT("detach_ppa: q_ptr = 0!\n");
1598 for (t = us->ppa; t->next != 0; t = t->next)
1599 if (t->next == us) {
1606 us->state = DL_UNATTACHED;
1607 dlpi_ok(q, DL_DETACH_REQ);
1612 * We call this with qwriter in order to give the upper queue procedures
1613 * the guarantee that the lower queue is not going to go away while
1614 * they are executing.
1623 us = (upperstr_t *) q->q_ptr;
1625 DPRINT("detach_lower: q_ptr = 0!\n");
1630 us->lowerq->q_ptr = 0;
1631 RD(us->lowerq)->q_ptr = 0;
1635 /* Unblock streams which now feed back up the control stream. */
1638 mp->b_datap->db_type = M_IOCACK;
1646 upperstr_t *us, *as;
1649 us = (upperstr_t *) q->q_ptr;
1651 DPRINT("pppuwsrv: q_ptr = 0!\n");
1656 * If this is a control stream, then this service procedure
1657 * probably got enabled because of flow control in the lower
1658 * stream being enabled (or because of the lower stream going
1659 * away). Therefore we enable the service procedure of all
1660 * attached upper streams.
1662 if (us->flags & US_CONTROL) {
1663 for (as = us->next; as != 0; as = as->next)
1667 /* Try to send on any data queued here. */
1668 us->flags &= ~US_BLOCKED;
1669 while ((mp = getq(q)) != 0) {
1670 if (!send_data(mp, us)) {
1679 /* should never get called... */
1696 * Flow control has back-enabled this stream:
1697 * enable the upper write service procedure for
1698 * the upper control stream for this lower stream.
1701 uq = (queue_t *) q->q_ptr;
1709 * This should only get called for control streams.
1716 upperstr_t *ppa, *us;
1720 ppa = (upperstr_t *) q->q_ptr;
1722 DPRINT("pppurput: q_ptr = 0!\n");
1726 switch (mp->b_datap->db_type) {
1728 MT_ENTER(&ppa->stats_lock);
1729 switch (*mp->b_rptr) {
1734 ppa->stats.ppp_ierrors++;
1740 ppa->stats.ppp_oerrors++;
1743 MT_EXIT(&ppa->stats_lock);
1750 * Attempt to match up the response with the stream
1751 * that the request came from.
1753 iop = (struct iocblk *) mp->b_rptr;
1754 for (us = ppa; us != 0; us = us->next)
1755 if (us->ioc_id == iop->ioc_id)
1765 * The serial device has hung up. We don't want to send
1766 * the M_HANGUP message up to pppd because that will stop
1767 * us from using the control stream any more. Instead we
1768 * send a zero-length message as an end-of-file indication.
1771 mp = allocb(1, BPRI_HI);
1773 DPRINT1("ppp/%d: couldn't allocate eof message!\n", ppa->mn);
1776 putnext(ppa->q, mp);
1780 if (mp->b_datap->db_type == M_DATA) {
1782 if (mp->b_wptr - mp->b_rptr < PPP_HDRLEN) {
1783 PULLUP(mp, PPP_HDRLEN);
1785 DPRINT1("ppp_urput: msgpullup failed (len=%d)\n", len);
1789 MT_ENTER(&ppa->stats_lock);
1790 ppa->stats.ppp_ipackets++;
1791 ppa->stats.ppp_ibytes += len;
1792 #ifdef INCR_IPACKETS
1795 MT_EXIT(&ppa->stats_lock);
1797 proto = PPP_PROTOCOL(mp->b_rptr);
1798 if (proto < 0x8000 && (us = find_dest(ppa, proto)) != 0) {
1800 * A data packet for some network protocol.
1801 * Queue it on the upper stream for that protocol.
1802 * XXX could we just putnext it? (would require thought)
1803 * The rblocked flag is there to ensure that we keep
1804 * messages in order for each network protocol.
1806 if (!pass_packet(us, mp, 0))
1808 if (!us->rblocked && !canput(us->q))
1818 * A control frame, a frame for an unknown protocol,
1819 * or some other message type.
1820 * Send it up to pppd via the control stream.
1822 if (queclass(mp) == QPCTL || canputnext(ppa->q))
1823 putnext(ppa->q, mp);
1836 upperstr_t *us, *as;
1839 dl_unitdata_ind_t *ud;
1843 us = (upperstr_t *) q->q_ptr;
1845 DPRINT("pppursrv: q_ptr = 0!\n");
1849 if (us->flags & US_CONTROL) {
1852 * If there is no lower queue attached, run the write service
1853 * routines of other upper streams attached to this PPA.
1855 if (us->lowerq == 0) {
1858 if (as->flags & US_BLOCKED)
1865 * Messages get queued on this stream's read queue if they
1866 * can't be queued on the read queue of the attached stream
1867 * that they are destined for. This is for flow control -
1868 * when this queue fills up, the lower read put procedure will
1869 * queue messages there and the flow control will propagate
1872 while ((mp = getq(q)) != 0) {
1873 proto = PPP_PROTOCOL(mp->b_rptr);
1874 if (proto < 0x8000 && (as = find_dest(us, proto)) != 0) {
1887 /* can now put stuff directly on network protocol streams again */
1888 for (as = us->next; as != 0; as = as->next)
1893 * If this stream has a lower stream attached,
1894 * enable the read queue's service routine.
1895 * XXX we should really only do this if the queue length
1896 * has dropped below the low-water mark.
1898 if (us->lowerq != 0)
1899 qenable(RD(us->lowerq));
1903 * A network protocol stream. Put a DLPI header on each
1904 * packet and send it on.
1905 * (Actually, it seems that the IP module will happily
1906 * accept M_DATA messages without the DL_UNITDATA_IND header.)
1908 while ((mp = getq(q)) != 0) {
1909 if (!canputnext(q)) {
1914 proto = PPP_PROTOCOL(mp->b_rptr);
1915 mp->b_rptr += PPP_HDRLEN;
1916 hdr = allocb(sizeof(dl_unitdata_ind_t) + 2 * sizeof(uint),
1919 /* XXX should put it back and use bufcall */
1923 hdr->b_datap->db_type = M_PROTO;
1924 ud = (dl_unitdata_ind_t *) hdr->b_wptr;
1925 hdr->b_wptr += sizeof(dl_unitdata_ind_t) + 2 * sizeof(uint);
1927 ud->dl_primitive = DL_UNITDATA_IND;
1928 ud->dl_dest_addr_length = sizeof(uint);
1929 ud->dl_dest_addr_offset = sizeof(dl_unitdata_ind_t);
1930 ud->dl_src_addr_length = sizeof(uint);
1931 ud->dl_src_addr_offset = ud->dl_dest_addr_offset + sizeof(uint);
1932 #if DL_CURRENT_VERSION >= 2
1933 ud->dl_group_address = 0;
1935 /* Send the DLPI client the data with the SAP they requested,
1936 (e.g. ETHERTYPE_IP) rather than the PPP protocol number
1938 ((uint *)(ud + 1))[0] = us->req_sap; /* dest SAP */
1939 ((uint *)(ud + 1))[1] = us->req_sap; /* src SAP */
1943 #endif /* NO_DLPI */
1946 * Now that we have consumed some packets from this queue,
1947 * enable the control stream's read service routine so that we
1948 * can process any packets for us that might have got queued
1949 * there for flow control reasons.
1952 qenable(us->ppa->q);
1959 find_dest(ppa, proto)
1965 for (us = ppa->next; us != 0; us = us->next)
1966 if (proto == us->sap)
1972 * We simply put the message on to the associated upper control stream
1973 * (either here or in ppplrsrv). That way we enter the perimeters
1974 * before looking through the list of attached streams to decide which
1975 * stream it should go up.
1985 switch (mp->b_datap->db_type) {
1987 iop = (struct iocblk *) mp->b_rptr;
1988 iop->ioc_error = EINVAL;
1989 mp->b_datap->db_type = M_IOCNAK;
1993 if (*mp->b_rptr & FLUSHR)
1994 flushq(q, FLUSHDATA);
1995 if (*mp->b_rptr & FLUSHW) {
1996 *mp->b_rptr &= ~FLUSHR;
2004 * If we can't get the lower lock straight away, queue this one
2005 * rather than blocking, to avoid the possibility of deadlock.
2007 if (!TRYLOCK_LOWER_R) {
2013 * Check that we're still connected to the driver.
2015 uq = (queue_t *) q->q_ptr;
2018 DPRINT1("ppplrput: q = %x, uq = 0??\n", q);
2024 * Try to forward the message to the put routine for the upper
2025 * control stream for this lower stream.
2026 * If there are already messages queued here, queue this one so
2027 * they don't get out of order.
2029 if (queclass(mp) == QPCTL || (qsize(q) == 0 && canput(uq)))
2046 * Packets get queued here for flow control reasons
2047 * or if the lrput routine couldn't get the lower lock
2051 uq = (queue_t *) q->q_ptr;
2054 flushq(q, FLUSHALL);
2055 DPRINT1("ppplrsrv: q = %x, uq = 0??\n", q);
2058 while ((mp = getq(q)) != 0) {
2059 if (queclass(mp) == QPCTL || canput(uq))
2071 putctl2(q, type, code, val)
2073 int type, code, val;
2077 mp = allocb(2, BPRI_HI);
2080 mp->b_datap->db_type = type;
2081 mp->b_wptr[0] = code;
2082 mp->b_wptr[1] = val;
2089 putctl4(q, type, code, val)
2091 int type, code, val;
2095 mp = allocb(4, BPRI_HI);
2098 mp->b_datap->db_type = type;
2099 mp->b_wptr[0] = code;
2100 ((short *)mp->b_wptr)[1] = val;
2114 DPRINT("ppp upper streams:\n");
2115 for (us = minor_devs; us != 0; us = us->nextmn) {
2117 DPRINT3(" %d: q=%x rlev=%d",
2118 us->mn, uq, (uq? qsize(uq): 0));
2119 DPRINT3(" wlev=%d flags=0x%b", (uq? qsize(WR(uq)): 0),
2120 us->flags, "\020\1priv\2control\3blocked\4last");
2121 DPRINT3(" state=%x sap=%x req_sap=%x", us->state, us->sap,
2126 DPRINT1(" ppa=%d\n", us->ppa->ppa_id);
2127 if (us->flags & US_CONTROL) {
2129 DPRINT3(" control for %d lq=%x rlev=%d",
2130 us->ppa_id, lq, (lq? qsize(RD(lq)): 0));
2131 DPRINT3(" wlev=%d mru=%d mtu=%d\n",
2132 (lq? qsize(lq): 0), us->mru, us->mtu);
2135 mp->b_datap->db_type = M_IOCACK;
2139 #ifdef FILTER_PACKETS
2140 #include <netinet/in_systm.h>
2141 #include <netinet/ip.h>
2142 #include <netinet/udp.h>
2143 #include <netinet/tcp.h>
2145 #define MAX_IPHDR 128 /* max TCP/IP header size */
2148 /* The following table contains a hard-coded list of protocol/port pairs.
2149 * Any matching packets are either discarded unconditionally, or,
2150 * if ok_if_link_up is non-zero when a connection does not currently exist
2151 * (i.e., they go through if the connection is present, but never initiate
2153 * This idea came from a post by dm@garage.uun.org (David Mazieres)
2155 static struct pktfilt_tab {
2158 u_short ok_if_link_up;
2160 { IPPROTO_UDP, 520, 1 }, /* RIP, ok to pass if link is up */
2161 { IPPROTO_UDP, 123, 1 }, /* NTP, don't keep up the link for it */
2162 { -1, 0, 0 } /* terminator entry has port == -1 */
2167 ip_hard_filter(us, mp, outbound)
2173 struct pktfilt_tab *pft;
2179 /* Note, the PPP header has already been pulled up in all cases */
2180 proto = PPP_PROTOCOL(mp->b_rptr);
2181 if (us->flags & US_DBGLOG)
2182 DPRINT3("ppp/%d: filter, proto=0x%x, out=%d\n", us->mn, proto, outbound);
2187 if ((mp->b_wptr - mp->b_rptr) == PPP_HDRLEN && mp->b_cont != 0) {
2188 temp_mp = mp->b_cont;
2189 len = msgdsize(temp_mp);
2190 hlen = (len < MAX_IPHDR) ? len : MAX_IPHDR;
2191 PULLUP(temp_mp, hlen);
2193 DPRINT2("ppp/%d: filter, pullup next failed, len=%d\n",
2195 mp->b_cont = 0; /* PULLUP() freed the rest */
2199 ip = (struct ip *)mp->b_cont->b_rptr;
2203 hlen = (len < (PPP_HDRLEN+MAX_IPHDR)) ? len : (PPP_HDRLEN+MAX_IPHDR);
2206 DPRINT2("ppp/%d: filter, pullup failed, len=%d\n",
2210 ip = (struct ip *)(mp->b_rptr + PPP_HDRLEN);
2213 /* For IP traffic, certain packets (e.g., RIP) may be either
2214 * 1. ignored - dropped completely
2215 * 2. will not initiate a connection, but
2216 * will be passed if a connection is currently up.
2218 for (pft=pktfilt_tab; pft->proto != -1; pft++) {
2219 if (ip->ip_p == pft->proto) {
2220 switch(pft->proto) {
2222 if (((struct udphdr *) &((int *)ip)[ip->ip_hl])->uh_dport
2223 == htons(pft->port)) goto endfor;
2226 if (((struct tcphdr *) &((int *)ip)[ip->ip_hl])->th_dport
2227 == htons(pft->port)) goto endfor;
2233 if (pft->proto != -1) {
2234 if (us->flags & US_DBGLOG)
2235 DPRINT3("ppp/%d: found IP pkt, proto=0x%x (%d)\n",
2236 us->mn, pft->proto, pft->port);
2237 /* Discard if not connected, or if not pass_with_link_up */
2238 /* else, if link is up let go by, but don't update time */
2239 return pft->ok_if_link_up? -1: 0;
2242 } /* end switch (proto) */
2246 #endif /* FILTER_PACKETS */