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 1.25 1999/10/08 01:10:12 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>.
78 #include <netinet/in.h> /* leave this outside of PRIOQ for htons */
87 * The IP module may use this SAP value for IP packets.
90 #define ETHERTYPE_IP 0x800
93 #if !defined(ETHERTYPE_IPV6)
94 #define ETHERTYPE_IPV6 0x86dd
95 #endif /* !defined(ETHERTYPE_IPV6) */
97 #if !defined(ETHERTYPE_ALLSAP) && defined(SOL2)
98 #define ETHERTYPE_ALLSAP 0
99 #endif /* !defined(ETHERTYPE_ALLSAP) && defined(SOL2) */
101 #if !defined(PPP_ALLSAP) && defined(SOL2)
102 #define PPP_ALLSAP PPP_ALLSTATIONS
103 #endif /* !defined(PPP_ALLSAP) && defined(SOL2) */
109 * We use this reader-writer lock to ensure that the lower streams
110 * stay connected to the upper streams while the lower-side put and
111 * service procedures are running. Essentially it is an existence
112 * lock for the upper stream associated with each lower stream.
114 krwlock_t ppp_lower_lock;
115 #define LOCK_LOWER_W rw_enter(&ppp_lower_lock, RW_WRITER)
116 #define LOCK_LOWER_R rw_enter(&ppp_lower_lock, RW_READER)
117 #define TRYLOCK_LOWER_R rw_tryenter(&ppp_lower_lock, RW_READER)
118 #define UNLOCK_LOWER rw_exit(&ppp_lower_lock)
120 #define MT_ENTER(x) mutex_enter(x)
121 #define MT_EXIT(x) mutex_exit(x)
124 * Notes on multithreaded implementation for Solaris 2:
126 * We use an inner perimeter around each queue pair and an outer
127 * perimeter around the whole driver. The inner perimeter is
128 * entered exclusively for all entry points (open, close, put,
129 * service). The outer perimeter is entered exclusively for open
130 * and close and shared for put and service. This is all done for
131 * us by the streams framework.
133 * I used to think that the perimeters were entered for the lower
134 * streams' put and service routines as well as for the upper streams'.
135 * Because of problems experienced by people, and after reading the
136 * documentation more closely, I now don't think that is true. So we
137 * now use ppp_lower_lock to give us an existence guarantee on the
138 * upper stream controlling each lower stream.
140 * Shared entry to the outer perimeter protects the existence of all
141 * the upper streams and their upperstr_t structures, and guarantees
142 * that the following fields of any upperstr_t won't change:
143 * nextmn, next, nextppa. It guarantees that the lowerq field of an
144 * upperstr_t won't go from non-zero to zero, that the global `ppas'
145 * won't change and that the no lower stream will get unlinked.
147 * Shared (reader) access to ppa_lower_lock guarantees that no lower
148 * stream will be unlinked and that the lowerq field of all upperstr_t
149 * structures won't change.
153 #define LOCK_LOWER_W 0
154 #define LOCK_LOWER_R 0
155 #define TRYLOCK_LOWER_R 1
156 #define UNLOCK_LOWER 0
157 #define MT_ENTER(x) 0
163 * Private information; one per upper stream.
165 typedef struct upperstr {
166 minor_t mn; /* minor device number */
167 struct upperstr *nextmn; /* next minor device */
168 queue_t *q; /* read q associated with this upper stream */
169 int flags; /* flag bits, see below */
170 int state; /* current DLPI state */
171 int sap; /* service access point */
172 int req_sap; /* which SAP the DLPI client requested */
173 struct upperstr *ppa; /* control stream for our ppa */
174 struct upperstr *next; /* next stream for this ppa */
175 uint ioc_id; /* last ioctl ID for this stream */
176 enum NPmode npmode; /* what to do with packets on this SAP */
177 unsigned char rblocked; /* flow control has blocked upper read strm */
178 /* N.B. rblocked is only changed by control stream's put/srv procs */
180 * There is exactly one control stream for each PPA.
181 * The following fields are only used for control streams.
184 queue_t *lowerq; /* write queue attached below this PPA */
185 struct upperstr *nextppa; /* next control stream */
188 struct pppstat stats; /* statistics */
189 time_t last_sent; /* time last NP packet sent */
190 time_t last_recv; /* time last NP packet rcvd */
192 kmutex_t stats_lock; /* lock for stats updates */
193 kstat_t *kstats; /* stats for netstat */
197 char ifname[IFNAMSIZ];
198 struct ifstats ifstats;
202 /* Values for flags */
203 #define US_PRIV 1 /* stream was opened by superuser */
204 #define US_CONTROL 2 /* stream is a control stream */
205 #define US_BLOCKED 4 /* flow ctrl has blocked lower write stream */
206 #define US_LASTMOD 8 /* no PPP modules below us */
207 #define US_DBGLOG 0x10 /* log various occurrences */
208 #define US_RBLOCKED 0x20 /* flow ctrl has blocked upper read stream */
211 #if DL_CURRENT_VERSION >= 2
212 #define US_PROMISC 0x40 /* stream is promiscuous */
213 #endif /* DL_CURRENT_VERSION >= 2 */
214 #define US_RAWDATA 0x80 /* raw M_DATA, no DLPI header */
215 #endif /* defined(SOL2) */
218 static u_char max_band=0;
219 static u_char def_band=0;
221 #define IPPORT_DEFAULT 65535
224 * Port priority table
225 * Highest priority ports are listed first, lowest are listed last.
226 * ICMP & packets using unlisted ports will be treated as "default".
227 * If IPPORT_DEFAULT is not listed here, "default" packets will be
228 * assigned lowest priority.
229 * Each line should be terminated with "0".
230 * Line containing only "0" marks the end of the list.
233 static u_short prioq_table[]= {
235 22, 23, 513, 517, 518, 0,
239 20, 70, 80, 8001, 8008, 8080, 0, /* 8001,8008,8080 - common proxy ports */
245 static upperstr_t *minor_devs = NULL;
246 static upperstr_t *ppas = NULL;
249 static int pppopen __P((queue_t *, dev_t *, int, int, cred_t *));
250 static int pppclose __P((queue_t *, int, cred_t *));
252 static int pppopen __P((queue_t *, int, int, int));
253 static int pppclose __P((queue_t *, int));
255 static int pppurput __P((queue_t *, mblk_t *));
256 static int pppuwput __P((queue_t *, mblk_t *));
257 static int pppursrv __P((queue_t *));
258 static int pppuwsrv __P((queue_t *));
259 static int ppplrput __P((queue_t *, mblk_t *));
260 static int ppplwput __P((queue_t *, mblk_t *));
261 static int ppplrsrv __P((queue_t *));
262 static int ppplwsrv __P((queue_t *));
264 static void dlpi_request __P((queue_t *, mblk_t *, upperstr_t *));
265 static void dlpi_error __P((queue_t *, upperstr_t *, int, int, int));
266 static void dlpi_ok __P((queue_t *, int));
268 static int send_data __P((mblk_t *, upperstr_t *));
269 static void new_ppa __P((queue_t *, mblk_t *));
270 static void attach_ppa __P((queue_t *, mblk_t *));
271 static void detach_ppa __P((queue_t *, mblk_t *));
272 static void detach_lower __P((queue_t *, mblk_t *));
273 static void debug_dump __P((queue_t *, mblk_t *));
274 static upperstr_t *find_dest __P((upperstr_t *, int));
276 static upperstr_t *find_promisc __P((upperstr_t *, int));
277 static mblk_t *prepend_ether __P((upperstr_t *, mblk_t *, int));
278 static mblk_t *prepend_udind __P((upperstr_t *, mblk_t *, int));
279 static void promisc_sendup __P((upperstr_t *, mblk_t *, int, int));
280 #endif /* defined(SOL2) */
281 static int putctl2 __P((queue_t *, int, int, int));
282 static int putctl4 __P((queue_t *, int, int, int));
283 static int pass_packet __P((upperstr_t *ppa, mblk_t *mp, int outbound));
284 #ifdef FILTER_PACKETS
285 static int ip_hard_filter __P((upperstr_t *ppa, mblk_t *mp, int outbound));
286 #endif /* FILTER_PACKETS */
288 #define PPP_ID 0xb1a6
289 static struct module_info ppp_info = {
291 PPP_ID, "ppp", 0, 512, 512, 384
293 PPP_ID, "ppp", 0, 512, 512, 128
297 static struct qinit pppurint = {
298 pppurput, pppursrv, pppopen, pppclose, NULL, &ppp_info, NULL
301 static struct qinit pppuwint = {
302 pppuwput, pppuwsrv, NULL, NULL, NULL, &ppp_info, NULL
305 static struct qinit ppplrint = {
306 ppplrput, ppplrsrv, NULL, NULL, NULL, &ppp_info, NULL
309 static struct qinit ppplwint = {
310 ppplwput, ppplwsrv, NULL, NULL, NULL, &ppp_info, NULL
314 extern struct ifstats *ifstats;
318 struct streamtab pppinfo = {
319 &pppurint, &pppuwint,
326 * How we maintain statistics.
329 #define INCR_IPACKETS(ppa) \
330 if (ppa->kstats != 0) { \
331 KSTAT_NAMED_PTR(ppa->kstats)[0].value.ul++; \
333 #define INCR_IERRORS(ppa) \
334 if (ppa->kstats != 0) { \
335 KSTAT_NAMED_PTR(ppa->kstats)[1].value.ul++; \
337 #define INCR_OPACKETS(ppa) \
338 if (ppa->kstats != 0) { \
339 KSTAT_NAMED_PTR(ppa->kstats)[2].value.ul++; \
341 #define INCR_OERRORS(ppa) \
342 if (ppa->kstats != 0) { \
343 KSTAT_NAMED_PTR(ppa->kstats)[3].value.ul++; \
348 #define INCR_IPACKETS(ppa) ppa->ifstats.ifs_ipackets++;
349 #define INCR_IERRORS(ppa) ppa->ifstats.ifs_ierrors++;
350 #define INCR_OPACKETS(ppa) ppa->ifstats.ifs_opackets++;
351 #define INCR_OERRORS(ppa) ppa->ifstats.ifs_oerrors++;
355 * STREAMS driver entry points.
359 pppopen(q, devp, oflag, sflag, credp)
365 pppopen(q, dev, oflag, sflag)
367 int dev; /* really dev_t */
380 DRV_OPEN_OK(dev); /* device is already open */
383 /* Calculate max_bband & def_band from definitions in prioq.h
384 This colud be done at some more approtiate time (less often)
385 but this way it works well so I'll just leave it here */
393 if (*ptr++ == IPPORT_DEFAULT) {
397 max_band += new_band;
401 def_band = max_band - def_band;
405 if (sflag == CLONEOPEN) {
407 for (prevp = &minor_devs; (up = *prevp) != 0; prevp = &up->nextmn) {
414 mn = getminor(*devp);
418 for (prevp = &minor_devs; (up = *prevp) != 0; prevp = &up->nextmn) {
423 /* this can't happen */
424 q->q_ptr = WR(q)->q_ptr = (caddr_t) up;
430 * Construct a new minor node.
432 up = (upperstr_t *) ALLOC_SLEEP(sizeof(upperstr_t));
433 bzero((caddr_t) up, sizeof(upperstr_t));
435 DPRINT("pppopen: out of kernel memory\n");
442 *devp = makedevice(getmajor(*devp), mn);
446 up->flags |= US_PRIV;
448 up->state = DL_UNATTACHED;
451 up->ifflags = IFF_UP | IFF_POINTOPOINT;
454 up->last_sent = up->last_recv = time;
455 up->npmode = NPMODE_DROP;
456 q->q_ptr = (caddr_t) up;
457 WR(q)->q_ptr = (caddr_t) up;
460 mutex_init(&up->stats_lock, NULL, MUTEX_DRIVER, NULL);
465 DRV_OPEN_OK(makedev(major(dev), mn));
470 pppclose(q, flag, credp)
480 upperstr_t *up, **upp;
481 upperstr_t *as, *asnext;
486 up = (upperstr_t *) q->q_ptr;
488 DPRINT("pppclose: q_ptr = 0\n");
491 if (up->flags & US_DBGLOG)
492 DPRINT2("ppp/%d: close, flags=%x\n", up->mn, up->flags);
493 if (up->flags & US_CONTROL) {
495 struct ifstats *ifp, *pifp;
497 if (up->lowerq != 0) {
498 /* Gack! the lower stream should have be unlinked earlier! */
499 DPRINT1("ppp%d: lower stream still connected on close?\n",
502 up->lowerq->q_ptr = 0;
503 RD(up->lowerq)->q_ptr = 0;
509 * This stream represents a PPA:
510 * For all streams attached to the PPA, clear their
511 * references to this PPA.
512 * Then remove this PPA from the list of PPAs.
514 for (as = up->next; as != 0; as = asnext) {
518 if (as->flags & US_BLOCKED) {
519 as->flags &= ~US_BLOCKED;
520 flushq(WR(as->q), FLUSHDATA);
523 for (upp = &ppas; *upp != 0; upp = &(*upp)->nextppa)
529 /* Remove the statistics from the active list. */
530 for (ifp = ifstats, pifp = 0; ifp; ifp = ifp->ifs_next) {
531 if (ifp == &up->ifstats) {
533 pifp->ifs_next = ifp->ifs_next;
535 ifstats = ifp->ifs_next;
543 * If this stream is attached to a PPA,
544 * remove it from the PPA's list.
546 if ((as = up->ppa) != 0) {
547 for (; as->next != 0; as = as->next)
548 if (as->next == up) {
557 kstat_delete(up->kstats);
558 mutex_destroy(&up->stats_lock);
564 for (prevp = &minor_devs; *prevp != 0; prevp = &(*prevp)->nextmn) {
570 FREE(up, sizeof(upperstr_t));
577 * A message from on high. We do one of three things:
579 * - put the message on the lower write stream
580 * - queue it for our service routine
587 upperstr_t *us, *ppa, *nps;
597 struct ppp_idle *pip;
605 us = (upperstr_t *) q->q_ptr;
607 DPRINT("pppuwput: q_ptr = 0!\n");
611 DPRINT1("pppuwput/%d: mp = 0!\n", us->mn);
614 if (mp->b_datap == 0) {
615 DPRINT1("pppuwput/%d: mp->b_datap = 0!\n", us->mn);
618 switch (mp->b_datap->db_type) {
622 dlpi_request(q, mp, us);
627 if (us->flags & US_DBGLOG)
628 DPRINT3("ppp/%d: uwput M_DATA len=%d flags=%x\n",
629 us->mn, msgdsize(mp), us->flags);
630 if (us->ppa == 0 || msgdsize(mp) > us->ppa->mtu + PPP_HDRLEN
632 || (us->flags & US_CONTROL) == 0
635 DPRINT1("pppuwput: junk data len=%d\n", msgdsize(mp));
640 if ((us->flags & US_CONTROL) == 0 && !pass_packet(us, mp, 1))
643 if (!send_data(mp, us))
648 iop = (struct iocblk *) mp->b_rptr;
650 if (us->flags & US_DBGLOG)
651 DPRINT3("ppp/%d: ioctl %x count=%d\n",
652 us->mn, iop->ioc_cmd, iop->ioc_count);
653 switch (iop->ioc_cmd) {
655 case DLIOCRAW: /* raw M_DATA mode */
656 us->flags |= US_RAWDATA;
659 #endif /* defined(SOL2) */
661 if ((us->flags & US_CONTROL) == 0 || us->lowerq != 0)
663 if (mp->b_cont == 0) {
664 DPRINT1("pppuwput/%d: ioctl I_LINK b_cont = 0!\n", us->mn);
667 lb = (struct linkblk *) mp->b_cont->b_rptr;
670 DPRINT1("pppuwput/%d: ioctl I_LINK l_qbot = 0!\n", us->mn);
675 lq->q_ptr = (caddr_t) q;
676 RD(lq)->q_ptr = (caddr_t) us->q;
680 us->flags &= ~US_LASTMOD;
681 /* Unblock upper streams which now feed this lower stream. */
683 /* Send useful information down to the modules which
684 are now linked below us. */
685 putctl2(lq, M_CTL, PPPCTL_UNIT, us->ppa_id);
686 putctl4(lq, M_CTL, PPPCTL_MRU, us->mru);
687 putctl4(lq, M_CTL, PPPCTL_MTU, us->mtu);
689 /* Lower tty driver's queue hiwat/lowat from default 4096/128
690 to 256/128 since we don't want queueing of data on
691 output to physical device */
694 for (tlq = lq; tlq->q_next != NULL; tlq = tlq->q_next)
696 strqset(tlq, QHIWAT, 0, 256);
697 strqset(tlq, QLOWAT, 0, 128);
703 if (mp->b_cont == 0) {
704 DPRINT1("pppuwput/%d: ioctl I_UNLINK b_cont = 0!\n", us->mn);
707 lb = (struct linkblk *) mp->b_cont->b_rptr;
709 if (us->lowerq != lb->l_qbot) {
710 DPRINT2("ppp unlink: lowerq=%x qbot=%x\n",
711 us->lowerq, lb->l_qbot);
716 qwriter(q, mp, detach_lower, PERIM_OUTER);
721 if (us->flags & US_CONTROL)
723 if ((us->flags & US_PRIV) == 0) {
727 /* Arrange to return an int */
728 if ((mq = mp->b_cont) == 0
729 || mq->b_datap->db_lim - mq->b_rptr < sizeof(int)) {
730 mq = allocb(sizeof(int), BPRI_HI);
740 iop->ioc_count = sizeof(int);
741 mq->b_wptr = mq->b_rptr + sizeof(int);
742 qwriter(q, mp, new_ppa, PERIM_OUTER);
747 /* like dlpi_attach, for programs which can't write to
748 the stream (like pppstats) */
749 if (iop->ioc_count != sizeof(int) || us->ppa != 0)
751 if (mp->b_cont == 0) {
752 DPRINT1("pppuwput/%d: ioctl PPPIO_ATTACH b_cont = 0!\n", us->mn);
755 n = *(int *)mp->b_cont->b_rptr;
756 for (ppa = ppas; ppa != 0; ppa = ppa->nextppa)
757 if (ppa->ppa_id == n)
763 qwriter(q, mp, attach_ppa, PERIM_OUTER);
769 /* Attach to a given SAP. */
770 if (iop->ioc_count != sizeof(int) || us->ppa == 0)
772 if (mp->b_cont == 0) {
773 DPRINT1("pppuwput/%d: ioctl PPPIO_BIND b_cont = 0!\n", us->mn);
776 n = *(int *)mp->b_cont->b_rptr;
777 /* n must be a valid PPP network protocol number. */
778 if (n < 0x21 || n > 0x3fff || (n & 0x101) != 1)
780 /* check that no other stream is bound to this sap already. */
781 for (os = us->ppa; os != 0; os = os->next)
793 if (iop->ioc_count != sizeof(int) || (us->flags & US_CONTROL) == 0)
795 if (mp->b_cont == 0) {
796 DPRINT1("pppuwput/%d: ioctl PPPIO_MRU b_cont = 0!\n", us->mn);
799 n = *(int *)mp->b_cont->b_rptr;
800 if (n <= 0 || n > PPP_MAXMRU)
806 putctl4(us->lowerq, M_CTL, PPPCTL_MRU, n);
812 if (iop->ioc_count != sizeof(int) || (us->flags & US_CONTROL) == 0)
814 if (mp->b_cont == 0) {
815 DPRINT1("pppuwput/%d: ioctl PPPIO_MTU b_cont = 0!\n", us->mn);
818 n = *(int *)mp->b_cont->b_rptr;
819 if (n <= 0 || n > PPP_MAXMTU)
823 /* The MTU reported in netstat, not used as IP max packet size! */
824 us->ifstats.ifs_mtu = n;
827 putctl4(us->lowerq, M_CTL, PPPCTL_MTU, n);
833 us->flags |= US_LASTMOD;
838 if (iop->ioc_count != sizeof(int))
840 if (mp->b_cont == 0) {
841 DPRINT1("pppuwput/%d: ioctl PPPIO_DEBUG b_cont = 0!\n", us->mn);
844 n = *(int *)mp->b_cont->b_rptr;
845 if (n == PPPDBG_DUMP + PPPDBG_DRIVER) {
846 qwriter(q, NULL, debug_dump, PERIM_OUTER);
849 } else if (n == PPPDBG_LOG + PPPDBG_DRIVER) {
850 DPRINT1("ppp/%d: debug log enabled\n", us->mn);
851 us->flags |= US_DBGLOG;
855 if (us->ppa == 0 || us->ppa->lowerq == 0)
857 putnext(us->ppa->lowerq, mp);
863 if (iop->ioc_count != 2 * sizeof(int))
865 if ((us->flags & US_CONTROL) == 0)
867 if (mp->b_cont == 0) {
868 DPRINT1("pppuwput/%d: ioctl PPPIO_NPMODE b_cont = 0!\n", us->mn);
871 sap = ((int *)mp->b_cont->b_rptr)[0];
872 for (nps = us->next; nps != 0; nps = nps->next) {
873 if (us->flags & US_DBGLOG)
874 DPRINT2("us = 0x%x, us->next->sap = 0x%x\n", nps, nps->sap);
879 if (us->flags & US_DBGLOG)
880 DPRINT2("ppp/%d: no stream for sap %x\n", us->mn, sap);
883 /* XXX possibly should use qwriter here */
884 nps->npmode = (enum NPmode) ((int *)mp->b_cont->b_rptr)[1];
885 if (nps->npmode != NPMODE_QUEUE && (nps->flags & US_BLOCKED) != 0)
892 if ((ppa = us->ppa) == 0)
894 mq = allocb(sizeof(struct ppp_idle), BPRI_HI);
903 pip = (struct ppp_idle *) mq->b_wptr;
904 pip->xmit_idle = time - ppa->last_sent;
905 pip->recv_idle = time - ppa->last_recv;
906 mq->b_wptr += sizeof(struct ppp_idle);
907 iop->ioc_count = sizeof(struct ppp_idle);
913 /* Sent from IP down to us. Attach the ifstats structure. */
914 if (iop->ioc_count != sizeof(struct ifreq) || us->ppa == 0)
916 ifr = (struct ifreq *)mp->b_cont->b_rptr;
917 /* Find the unit number in the interface name. */
918 for (i = 0; i < IFNAMSIZ; i++) {
919 if (ifr->ifr_name[i] == 0 ||
920 (ifr->ifr_name[i] >= '0' &&
921 ifr->ifr_name[i] <= '9'))
924 us->ifname[i] = ifr->ifr_name[i];
928 /* Convert the unit number to binary. */
929 for (n = 0; i < IFNAMSIZ; i++) {
930 if (ifr->ifr_name[i] == 0) {
934 n = n * 10 + ifr->ifr_name[i] - '0';
938 /* Verify the ppa. */
939 if (us->ppa->ppa_id != n)
943 /* Set up the netstat block. */
944 strncpy (ppa->ifname, us->ifname, IFNAMSIZ);
946 ppa->ifstats.ifs_name = ppa->ifname;
947 ppa->ifstats.ifs_unit = n;
948 ppa->ifstats.ifs_active = us->state != DL_UNBOUND;
949 ppa->ifstats.ifs_mtu = ppa->mtu;
951 /* Link in statistics used by netstat. */
952 ppa->ifstats.ifs_next = ifstats;
953 ifstats = &ppa->ifstats;
960 if (!(us->flags & US_CONTROL)) {
966 ((struct iocblk_in *)iop)->ioc_ifflags = us->ifflags;
971 if (!(us->flags & US_CONTROL)) {
977 us->ifflags = ((struct iocblk_in *)iop)->ioc_ifflags;
982 if (!(us->flags & US_CONTROL)) {
988 us->ifflags |= IFF_RUNNING;
989 ((struct iocblk_in *)iop)->ioc_ifflags |= IFF_RUNNING;
995 * Vanilla SVR4 systems don't handle SIOCSIFMTU, rather
996 * they take the MTU from the DL_INFO_ACK we sent in response
997 * to their DL_INFO_REQ. Fortunately, they will update the
998 * MTU if we send an unsolicited DL_INFO_ACK up.
1000 if ((mq = allocb(sizeof(dl_info_req_t), BPRI_HI)) == 0)
1001 break; /* should do bufcall */
1002 ((union DL_primitives *)mq->b_rptr)->dl_primitive = DL_INFO_REQ;
1003 mq->b_wptr = mq->b_rptr + sizeof(dl_info_req_t);
1004 dlpi_request(q, mq, us);
1008 case SIOCGIFNETMASK:
1009 case SIOCSIFNETMASK:
1011 case SIOCGIFDSTADDR:
1012 case SIOCSIFDSTADDR:
1016 #endif /* LACHTCP */
1019 if (us->ppa == 0 || us->ppa->lowerq == 0)
1021 us->ioc_id = iop->ioc_id;
1023 switch (iop->ioc_cmd) {
1025 case PPPIO_GETCSTAT:
1026 if (us->flags & US_LASTMOD) {
1030 putnext(us->ppa->lowerq, mp);
1033 if (us->flags & US_PRIV)
1034 putnext(us->ppa->lowerq, mp);
1036 DPRINT1("ppp ioctl %x rejected\n", iop->ioc_cmd);
1045 iop->ioc_error = error;
1046 mp->b_datap->db_type = M_IOCNAK;
1048 } else if (error == 0) {
1049 mp->b_datap->db_type = M_IOCACK;
1055 if (us->flags & US_DBGLOG)
1056 DPRINT2("ppp/%d: flush %x\n", us->mn, *mp->b_rptr);
1057 if (*mp->b_rptr & FLUSHW)
1058 flushq(q, FLUSHDATA);
1059 if (*mp->b_rptr & FLUSHR) {
1060 *mp->b_rptr &= ~FLUSHW;
1075 dlpi_request(q, mp, us)
1080 union DL_primitives *d = (union DL_primitives *) mp->b_rptr;
1081 int size = mp->b_wptr - mp->b_rptr;
1083 upperstr_t *ppa, *os;
1085 dl_info_ack_t *info;
1086 dl_bind_ack_t *ackp;
1087 #if DL_CURRENT_VERSION >= 2
1088 dl_phys_addr_ack_t *paddrack;
1089 static struct ether_addr eaddr = {0};
1092 if (us->flags & US_DBGLOG)
1093 DPRINT3("ppp/%d: dlpi prim %x len=%d\n", us->mn,
1094 d->dl_primitive, size);
1095 switch (d->dl_primitive) {
1097 if (size < sizeof(dl_info_req_t))
1099 if ((reply = allocb(sizeof(dl_info_ack_t), BPRI_HI)) == 0)
1100 break; /* should do bufcall */
1101 reply->b_datap->db_type = M_PCPROTO;
1102 info = (dl_info_ack_t *) reply->b_wptr;
1103 reply->b_wptr += sizeof(dl_info_ack_t);
1104 bzero((caddr_t) info, sizeof(dl_info_ack_t));
1105 info->dl_primitive = DL_INFO_ACK;
1106 info->dl_max_sdu = us->ppa? us->ppa->mtu: PPP_MAXMTU;
1107 info->dl_min_sdu = 1;
1108 info->dl_addr_length = sizeof(uint);
1109 info->dl_mac_type = DL_ETHER; /* a bigger lie */
1110 info->dl_current_state = us->state;
1111 info->dl_service_mode = DL_CLDLS;
1112 info->dl_provider_style = DL_STYLE2;
1113 #if DL_CURRENT_VERSION >= 2
1114 info->dl_sap_length = sizeof(uint);
1115 info->dl_version = DL_CURRENT_VERSION;
1121 if (size < sizeof(dl_attach_req_t))
1123 if (us->state != DL_UNATTACHED || us->ppa != 0) {
1124 dlpi_error(q, us, DL_ATTACH_REQ, DL_OUTSTATE, 0);
1127 for (ppa = ppas; ppa != 0; ppa = ppa->nextppa)
1128 if (ppa->ppa_id == d->attach_req.dl_ppa)
1131 dlpi_error(q, us, DL_ATTACH_REQ, DL_BADPPA, 0);
1135 qwriter(q, mp, attach_ppa, PERIM_OUTER);
1139 if (size < sizeof(dl_detach_req_t))
1141 if (us->state != DL_UNBOUND || us->ppa == 0) {
1142 dlpi_error(q, us, DL_DETACH_REQ, DL_OUTSTATE, 0);
1145 qwriter(q, mp, detach_ppa, PERIM_OUTER);
1149 if (size < sizeof(dl_bind_req_t))
1151 if (us->state != DL_UNBOUND || us->ppa == 0) {
1152 dlpi_error(q, us, DL_BIND_REQ, DL_OUTSTATE, 0);
1156 /* apparently this test fails (unnecessarily?) on some systems */
1157 if (d->bind_req.dl_service_mode != DL_CLDLS) {
1158 dlpi_error(q, us, DL_BIND_REQ, DL_UNSUPPORTED, 0);
1163 /* saps must be valid PPP network protocol numbers,
1164 except that we accept ETHERTYPE_IP in place of PPP_IP. */
1165 sap = d->bind_req.dl_sap;
1169 if (us->flags & US_DBGLOG)
1170 DPRINT2("DL_BIND_REQ: ip gives sap = 0x%x, us = 0x%x", sap, us);
1172 if (sap == ETHERTYPE_IP) /* normal IFF_IPV4 */
1174 else if (sap == ETHERTYPE_IPV6) /* when IFF_IPV6 is set */
1176 else if (sap == ETHERTYPE_ALLSAP) /* snoop gives sap of 0 */
1179 DPRINT2("DL_BIND_REQ: unrecognized sap = 0x%x, us = 0x%x", sap, us);
1180 dlpi_error(q, us, DL_BIND_REQ, DL_BADADDR, 0);
1184 if (sap == ETHERTYPE_IP)
1186 if (sap < 0x21 || sap > 0x3fff || (sap & 0x101) != 1) {
1187 dlpi_error(q, us, DL_BIND_REQ, DL_BADADDR, 0);
1190 #endif /* defined(SOL2) */
1192 /* check that no other stream is bound to this sap already. */
1193 for (os = us->ppa; os != 0; os = os->next)
1197 dlpi_error(q, us, DL_BIND_REQ, DL_NOADDR, 0);
1202 us->state = DL_IDLE;
1204 if ((reply = allocb(sizeof(dl_bind_ack_t) + sizeof(uint),
1206 break; /* should do bufcall */
1207 ackp = (dl_bind_ack_t *) reply->b_wptr;
1208 reply->b_wptr += sizeof(dl_bind_ack_t) + sizeof(uint);
1209 reply->b_datap->db_type = M_PCPROTO;
1210 bzero((caddr_t) ackp, sizeof(dl_bind_ack_t));
1211 ackp->dl_primitive = DL_BIND_ACK;
1213 ackp->dl_addr_length = sizeof(uint);
1214 ackp->dl_addr_offset = sizeof(dl_bind_ack_t);
1215 *(uint *)(ackp+1) = sap;
1220 if (size < sizeof(dl_unbind_req_t))
1222 if (us->state != DL_IDLE) {
1223 dlpi_error(q, us, DL_UNBIND_REQ, DL_OUTSTATE, 0);
1227 us->state = DL_UNBOUND;
1229 us->ppa->ifstats.ifs_active = 0;
1231 dlpi_ok(q, DL_UNBIND_REQ);
1234 case DL_UNITDATA_REQ:
1235 if (size < sizeof(dl_unitdata_req_t))
1237 if (us->state != DL_IDLE) {
1238 dlpi_error(q, us, DL_UNITDATA_REQ, DL_OUTSTATE, 0);
1241 if ((ppa = us->ppa) == 0) {
1242 cmn_err(CE_CONT, "ppp: in state dl_idle but ppa == 0?\n");
1245 len = mp->b_cont == 0? 0: msgdsize(mp->b_cont);
1246 if (len > ppa->mtu) {
1247 DPRINT2("dlpi data too large (%d > %d)\n", len, ppa->mtu);
1253 * Should there be any promiscuous stream(s), send the data
1254 * up for each promiscuous stream that we recognize.
1257 promisc_sendup(ppa, mp->b_cont, us->sap, 0);
1258 #endif /* defined(SOL2) */
1262 /* Extract s_port & d_port from IP-packet, the code is a bit
1263 dirty here, but so am I, too... */
1264 if (mp->b_datap->db_type == M_PROTO && us->sap == PPP_IP
1265 && mp->b_cont != 0) {
1269 u_char band_unset, cur_band, syn;
1270 u_short s_port, d_port;
1272 bb = mp->b_cont->b_rptr; /* bb points to IP-header*/
1273 len = mp->b_cont->b_wptr - mp->b_cont->b_rptr;
1275 s_port = IPPORT_DEFAULT;
1276 d_port = IPPORT_DEFAULT;
1277 if (len >= 20) { /* 20 = minimum length of IP header */
1278 iphlen = (bb[0] & 0x0f) * 4;
1283 if (len >= 20) { /* min length of TCP header */
1284 s_port = (tlh[0] << 8) + tlh[1];
1285 d_port = (tlh[2] << 8) + tlh[3];
1286 syn = tlh[13] & 0x02;
1290 if (len >= 8) { /* min length of UDP header */
1291 s_port = (tlh[0] << 8) + tlh[1];
1292 d_port = (tlh[2] << 8) + tlh[3];
1299 * Now calculate b_band for this packet from the
1300 * port-priority table.
1303 cur_band = max_band;
1306 while (*ptr && band_unset)
1307 if (s_port == *ptr || d_port == *ptr++) {
1308 mp->b_band = cur_band;
1316 mp->b_band = def_band;
1317 /* It may be usable to urge SYN packets a bit */
1322 /* this assumes PPP_HDRLEN <= sizeof(dl_unitdata_req_t) */
1323 if (mp->b_datap->db_ref > 1) {
1324 np = allocb(PPP_HDRLEN, BPRI_HI);
1327 np->b_cont = mp->b_cont;
1332 mp->b_datap->db_type = M_DATA;
1333 /* XXX should use dl_dest_addr_offset/length here,
1334 but we would have to translate ETHERTYPE_IP -> PPP_IP */
1335 mp->b_wptr = mp->b_rptr + PPP_HDRLEN;
1336 mp->b_rptr[0] = PPP_ALLSTATIONS;
1337 mp->b_rptr[1] = PPP_UI;
1338 mp->b_rptr[2] = us->sap >> 8;
1339 mp->b_rptr[3] = us->sap;
1340 if (pass_packet(us, mp, 1)) {
1341 if (!send_data(mp, us))
1346 #if DL_CURRENT_VERSION >= 2
1347 case DL_PHYS_ADDR_REQ:
1348 if (size < sizeof(dl_phys_addr_req_t))
1352 * Don't check state because ifconfig sends this one down too
1355 if ((reply = allocb(sizeof(dl_phys_addr_ack_t)+ETHERADDRL,
1357 break; /* should do bufcall */
1358 reply->b_datap->db_type = M_PCPROTO;
1359 paddrack = (dl_phys_addr_ack_t *) reply->b_wptr;
1360 reply->b_wptr += sizeof(dl_phys_addr_ack_t);
1361 bzero((caddr_t) paddrack, sizeof(dl_phys_addr_ack_t)+ETHERADDRL);
1362 paddrack->dl_primitive = DL_PHYS_ADDR_ACK;
1363 paddrack->dl_addr_length = ETHERADDRL;
1364 paddrack->dl_addr_offset = sizeof(dl_phys_addr_ack_t);
1365 bcopy(&eaddr, reply->b_wptr, ETHERADDRL);
1366 reply->b_wptr += ETHERADDRL;
1371 case DL_PROMISCON_REQ:
1372 if (size < sizeof(dl_promiscon_req_t))
1374 us->flags |= US_PROMISC;
1375 dlpi_ok(q, DL_PROMISCON_REQ);
1378 case DL_PROMISCOFF_REQ:
1379 if (size < sizeof(dl_promiscoff_req_t))
1381 us->flags &= ~US_PROMISC;
1382 dlpi_ok(q, DL_PROMISCOFF_REQ);
1385 case DL_PROMISCON_REQ: /* fall thru */
1386 case DL_PROMISCOFF_REQ: /* fall thru */
1387 #endif /* defined(SOL2) */
1388 #endif /* DL_CURRENT_VERSION >= 2 */
1390 #if DL_CURRENT_VERSION >= 2
1391 case DL_SET_PHYS_ADDR_REQ:
1392 case DL_SUBS_BIND_REQ:
1393 case DL_SUBS_UNBIND_REQ:
1394 case DL_ENABMULTI_REQ:
1395 case DL_DISABMULTI_REQ:
1398 case DL_REPLY_UPDATE_REQ:
1400 case DL_DATA_ACK_REQ:
1402 case DL_CONNECT_REQ:
1404 dlpi_error(q, us, d->dl_primitive, DL_NOTSUPPORTED, 0);
1407 case DL_CONNECT_RES:
1408 case DL_DISCONNECT_REQ:
1411 dlpi_error(q, us, d->dl_primitive, DL_OUTSTATE, 0);
1415 dlpi_error(q, us, d->dl_primitive, DL_BADQOSTYPE, 0);
1418 #if DL_CURRENT_VERSION >= 2
1425 cmn_err(CE_CONT, "ppp: unknown dlpi prim 0x%x\n", d->dl_primitive);
1428 dlpi_error(q, us, d->dl_primitive, DL_BADPRIM, 0);
1435 dlpi_error(q, us, prim, err, uerr)
1438 int prim, err, uerr;
1441 dl_error_ack_t *errp;
1443 if (us->flags & US_DBGLOG)
1444 DPRINT3("ppp/%d: dlpi error, prim=%x, err=%x\n", us->mn, prim, err);
1445 reply = allocb(sizeof(dl_error_ack_t), BPRI_HI);
1447 return; /* XXX should do bufcall */
1448 reply->b_datap->db_type = M_PCPROTO;
1449 errp = (dl_error_ack_t *) reply->b_wptr;
1450 reply->b_wptr += sizeof(dl_error_ack_t);
1451 errp->dl_primitive = DL_ERROR_ACK;
1452 errp->dl_error_primitive = prim;
1453 errp->dl_errno = err;
1454 errp->dl_unix_errno = uerr;
1466 reply = allocb(sizeof(dl_ok_ack_t), BPRI_HI);
1468 return; /* XXX should do bufcall */
1469 reply->b_datap->db_type = M_PCPROTO;
1470 okp = (dl_ok_ack_t *) reply->b_wptr;
1471 reply->b_wptr += sizeof(dl_ok_ack_t);
1472 okp->dl_primitive = DL_OK_ACK;
1473 okp->dl_correct_primitive = prim;
1476 #endif /* NO_DLPI */
1479 pass_packet(us, mp, outbound)
1487 if ((ppa = us->ppa) == 0) {
1492 #ifdef FILTER_PACKETS
1493 pass = ip_hard_filter(us, mp, outbound);
1496 * Here is where we might, in future, decide whether to pass
1497 * or drop the packet, and whether it counts as link activity.
1500 #endif /* FILTER_PACKETS */
1503 /* pass only if link already up, and don't update time */
1504 if (ppa->lowerq == 0) {
1511 ppa->last_sent = time;
1513 ppa->last_recv = time;
1520 * We have some data to send down to the lower stream (or up the
1521 * control stream, if we don't have a lower stream attached).
1522 * Returns 1 if the message was dealt with, 0 if it wasn't able
1523 * to be sent on and should therefore be queued up.
1532 if ((us->flags & US_BLOCKED) || us->npmode == NPMODE_QUEUE)
1535 if (ppa == 0 || us->npmode == NPMODE_DROP || us->npmode == NPMODE_ERROR) {
1536 if (us->flags & US_DBGLOG)
1537 DPRINT2("ppp/%d: dropping pkt (npmode=%d)\n", us->mn, us->npmode);
1541 if (ppa->lowerq == 0) {
1542 /* try to send it up the control stream */
1543 if (bcanputnext(ppa->q, mp->b_band)) {
1545 * The message seems to get corrupted for some reason if
1546 * we just send the message up as it is, so we send a copy.
1548 mblk_t *np = copymsg(mp);
1551 putnext(ppa->q, np);
1555 if (bcanputnext(ppa->lowerq, mp->b_band)) {
1556 MT_ENTER(&ppa->stats_lock);
1557 ppa->stats.ppp_opackets++;
1558 ppa->stats.ppp_obytes += msgdsize(mp);
1559 #ifdef INCR_OPACKETS
1562 MT_EXIT(&ppa->stats_lock);
1564 * The lower queue is only ever detached while holding an
1565 * exclusive lock on the whole driver. So we can be confident
1566 * that the lower queue is still there.
1568 putnext(ppa->lowerq, mp);
1572 us->flags |= US_BLOCKED;
1577 * Allocate a new PPA id and link this stream into the list of PPAs.
1578 * This procedure is called with an exclusive lock on all queues in
1586 upperstr_t *us, *up, **usp;
1589 us = (upperstr_t *) q->q_ptr;
1591 DPRINT("new_ppa: q_ptr = 0!\n");
1597 while ((up = *usp) != 0 && ppa_id == up->ppa_id) {
1601 us->ppa_id = ppa_id;
1606 us->flags |= US_CONTROL;
1607 us->npmode = NPMODE_PASS;
1614 * Create a kstats record for our statistics, so netstat -i works.
1616 if (us->kstats == 0) {
1619 sprintf(unit, "ppp%d", us->ppa->ppa_id);
1620 us->kstats = kstat_create("ppp", us->ppa->ppa_id, unit,
1621 "net", KSTAT_TYPE_NAMED, 4, 0);
1622 if (us->kstats != 0) {
1623 kstat_named_t *kn = KSTAT_NAMED_PTR(us->kstats);
1625 strcpy(kn[0].name, "ipackets");
1626 kn[0].data_type = KSTAT_DATA_ULONG;
1627 strcpy(kn[1].name, "ierrors");
1628 kn[1].data_type = KSTAT_DATA_ULONG;
1629 strcpy(kn[2].name, "opackets");
1630 kn[2].data_type = KSTAT_DATA_ULONG;
1631 strcpy(kn[3].name, "oerrors");
1632 kn[3].data_type = KSTAT_DATA_ULONG;
1633 kstat_install(us->kstats);
1638 *(int *)mp->b_cont->b_rptr = ppa_id;
1639 mp->b_datap->db_type = M_IOCACK;
1650 us = (upperstr_t *) q->q_ptr;
1652 DPRINT("attach_ppa: q_ptr = 0!\n");
1657 us->state = DL_UNBOUND;
1659 for (t = us->ppa; t->next != 0; t = t->next)
1663 if (mp->b_datap->db_type == M_IOCTL) {
1664 mp->b_datap->db_type = M_IOCACK;
1668 dlpi_ok(q, DL_ATTACH_REQ);
1680 us = (upperstr_t *) q->q_ptr;
1682 DPRINT("detach_ppa: q_ptr = 0!\n");
1686 for (t = us->ppa; t->next != 0; t = t->next)
1687 if (t->next == us) {
1694 us->state = DL_UNATTACHED;
1695 dlpi_ok(q, DL_DETACH_REQ);
1700 * We call this with qwriter in order to give the upper queue procedures
1701 * the guarantee that the lower queue is not going to go away while
1702 * they are executing.
1711 us = (upperstr_t *) q->q_ptr;
1713 DPRINT("detach_lower: q_ptr = 0!\n");
1718 us->lowerq->q_ptr = 0;
1719 RD(us->lowerq)->q_ptr = 0;
1723 /* Unblock streams which now feed back up the control stream. */
1726 mp->b_datap->db_type = M_IOCACK;
1734 upperstr_t *us, *as;
1737 us = (upperstr_t *) q->q_ptr;
1739 DPRINT("pppuwsrv: q_ptr = 0!\n");
1744 * If this is a control stream, then this service procedure
1745 * probably got enabled because of flow control in the lower
1746 * stream being enabled (or because of the lower stream going
1747 * away). Therefore we enable the service procedure of all
1748 * attached upper streams.
1750 if (us->flags & US_CONTROL) {
1751 for (as = us->next; as != 0; as = as->next)
1755 /* Try to send on any data queued here. */
1756 us->flags &= ~US_BLOCKED;
1757 while ((mp = getq(q)) != 0) {
1758 if (!send_data(mp, us)) {
1767 /* should never get called... */
1784 * Flow control has back-enabled this stream:
1785 * enable the upper write service procedure for
1786 * the upper control stream for this lower stream.
1789 uq = (queue_t *) q->q_ptr;
1797 * This should only get called for control streams.
1804 upperstr_t *ppa, *us;
1808 ppa = (upperstr_t *) q->q_ptr;
1810 DPRINT("pppurput: q_ptr = 0!\n");
1814 switch (mp->b_datap->db_type) {
1816 MT_ENTER(&ppa->stats_lock);
1817 switch (*mp->b_rptr) {
1822 ppa->stats.ppp_ierrors++;
1828 ppa->stats.ppp_oerrors++;
1831 MT_EXIT(&ppa->stats_lock);
1838 * Attempt to match up the response with the stream
1839 * that the request came from.
1841 iop = (struct iocblk *) mp->b_rptr;
1842 for (us = ppa; us != 0; us = us->next)
1843 if (us->ioc_id == iop->ioc_id)
1853 * The serial device has hung up. We don't want to send
1854 * the M_HANGUP message up to pppd because that will stop
1855 * us from using the control stream any more. Instead we
1856 * send a zero-length message as an end-of-file indication.
1859 mp = allocb(1, BPRI_HI);
1861 DPRINT1("ppp/%d: couldn't allocate eof message!\n", ppa->mn);
1864 putnext(ppa->q, mp);
1868 if (mp->b_datap->db_type == M_DATA) {
1870 if (mp->b_wptr - mp->b_rptr < PPP_HDRLEN) {
1871 PULLUP(mp, PPP_HDRLEN);
1873 DPRINT1("ppp_urput: msgpullup failed (len=%d)\n", len);
1877 MT_ENTER(&ppa->stats_lock);
1878 ppa->stats.ppp_ipackets++;
1879 ppa->stats.ppp_ibytes += len;
1880 #ifdef INCR_IPACKETS
1883 MT_EXIT(&ppa->stats_lock);
1885 proto = PPP_PROTOCOL(mp->b_rptr);
1889 * Should there be any promiscuous stream(s), send the data
1890 * up for each promiscuous stream that we recognize.
1892 promisc_sendup(ppa, mp, proto, 1);
1893 #endif /* defined(SOL2) */
1895 if (proto < 0x8000 && (us = find_dest(ppa, proto)) != 0) {
1897 * A data packet for some network protocol.
1898 * Queue it on the upper stream for that protocol.
1899 * XXX could we just putnext it? (would require thought)
1900 * The rblocked flag is there to ensure that we keep
1901 * messages in order for each network protocol.
1903 if (!pass_packet(us, mp, 0))
1905 if (!us->rblocked && !canput(us->q))
1915 * A control frame, a frame for an unknown protocol,
1916 * or some other message type.
1917 * Send it up to pppd via the control stream.
1919 if (queclass(mp) == QPCTL || canputnext(ppa->q))
1920 putnext(ppa->q, mp);
1933 upperstr_t *us, *as;
1936 dl_unitdata_ind_t *ud;
1940 us = (upperstr_t *) q->q_ptr;
1942 DPRINT("pppursrv: q_ptr = 0!\n");
1946 if (us->flags & US_CONTROL) {
1949 * If there is no lower queue attached, run the write service
1950 * routines of other upper streams attached to this PPA.
1952 if (us->lowerq == 0) {
1955 if (as->flags & US_BLOCKED)
1962 * Messages get queued on this stream's read queue if they
1963 * can't be queued on the read queue of the attached stream
1964 * that they are destined for. This is for flow control -
1965 * when this queue fills up, the lower read put procedure will
1966 * queue messages there and the flow control will propagate
1969 while ((mp = getq(q)) != 0) {
1970 proto = PPP_PROTOCOL(mp->b_rptr);
1971 if (proto < 0x8000 && (as = find_dest(us, proto)) != 0) {
1984 /* can now put stuff directly on network protocol streams again */
1985 for (as = us->next; as != 0; as = as->next)
1990 * If this stream has a lower stream attached,
1991 * enable the read queue's service routine.
1992 * XXX we should really only do this if the queue length
1993 * has dropped below the low-water mark.
1995 if (us->lowerq != 0)
1996 qenable(RD(us->lowerq));
2000 * A network protocol stream. Put a DLPI header on each
2001 * packet and send it on.
2002 * (Actually, it seems that the IP module will happily
2003 * accept M_DATA messages without the DL_UNITDATA_IND header.)
2005 while ((mp = getq(q)) != 0) {
2006 if (!canputnext(q)) {
2011 proto = PPP_PROTOCOL(mp->b_rptr);
2012 mp->b_rptr += PPP_HDRLEN;
2013 hdr = allocb(sizeof(dl_unitdata_ind_t) + 2 * sizeof(uint),
2016 /* XXX should put it back and use bufcall */
2020 hdr->b_datap->db_type = M_PROTO;
2021 ud = (dl_unitdata_ind_t *) hdr->b_wptr;
2022 hdr->b_wptr += sizeof(dl_unitdata_ind_t) + 2 * sizeof(uint);
2024 ud->dl_primitive = DL_UNITDATA_IND;
2025 ud->dl_dest_addr_length = sizeof(uint);
2026 ud->dl_dest_addr_offset = sizeof(dl_unitdata_ind_t);
2027 ud->dl_src_addr_length = sizeof(uint);
2028 ud->dl_src_addr_offset = ud->dl_dest_addr_offset + sizeof(uint);
2029 #if DL_CURRENT_VERSION >= 2
2030 ud->dl_group_address = 0;
2032 /* Send the DLPI client the data with the SAP they requested,
2033 (e.g. ETHERTYPE_IP) rather than the PPP protocol number
2035 ((uint *)(ud + 1))[0] = us->req_sap; /* dest SAP */
2036 ((uint *)(ud + 1))[1] = us->req_sap; /* src SAP */
2040 #endif /* NO_DLPI */
2043 * Now that we have consumed some packets from this queue,
2044 * enable the control stream's read service routine so that we
2045 * can process any packets for us that might have got queued
2046 * there for flow control reasons.
2049 qenable(us->ppa->q);
2056 find_dest(ppa, proto)
2062 for (us = ppa->next; us != 0; us = us->next)
2063 if (proto == us->sap)
2070 * Test upstream promiscuous conditions. As of now, only pass IPv4 and
2071 * Ipv6 packets upstream (let PPP packets be decoded elsewhere).
2074 find_promisc(us, proto)
2079 if ((proto != PPP_IP) && (proto != PPP_IPV6))
2080 return (upperstr_t *)0;
2082 for ( ; us; us = us->next) {
2083 if ((us->flags & US_PROMISC) && (us->state == DL_IDLE))
2087 return (upperstr_t *)0;
2091 * Prepend an empty Ethernet header to msg for snoop, et al.
2094 prepend_ether(us, mp, proto)
2102 if ((eh = allocb(sizeof(struct ether_header), BPRI_HI)) == 0) {
2107 if (proto == PPP_IP)
2108 type = ETHERTYPE_IP;
2109 else if (proto == PPP_IPV6)
2110 type = ETHERTYPE_IPV6;
2112 type = proto; /* What else? Let decoder decide */
2114 eh->b_wptr += sizeof(struct ether_header);
2115 bzero((caddr_t)eh->b_rptr, sizeof(struct ether_header));
2116 ((struct ether_header *)eh->b_rptr)->ether_type = htons((short)type);
2122 * Prepend DL_UNITDATA_IND mblk to msg
2125 prepend_udind(us, mp, proto)
2130 dl_unitdata_ind_t *dlu;
2134 size = sizeof(dl_unitdata_ind_t);
2135 if ((dh = allocb(size, BPRI_MED)) == 0) {
2140 dh->b_datap->db_type = M_PROTO;
2141 dh->b_wptr = dh->b_datap->db_lim;
2142 dh->b_rptr = dh->b_wptr - size;
2144 dlu = (dl_unitdata_ind_t *)dh->b_rptr;
2145 dlu->dl_primitive = DL_UNITDATA_IND;
2146 dlu->dl_dest_addr_length = 0;
2147 dlu->dl_dest_addr_offset = sizeof(dl_unitdata_ind_t);
2148 dlu->dl_src_addr_length = 0;
2149 dlu->dl_src_addr_offset = sizeof(dl_unitdata_ind_t);
2150 dlu->dl_group_address = 0;
2157 * For any recognized promiscuous streams, send data upstream
2160 promisc_sendup(ppa, mp, proto, skip)
2165 mblk_t *dup_mp, *dup_dup_mp;
2166 upperstr_t *prus, *nprus;
2168 if ((prus = find_promisc(ppa, proto)) != 0) {
2169 if (dup_mp = dupmsg(mp)) {
2172 dup_mp->b_rptr += PPP_HDRLEN;
2174 for ( ; nprus = find_promisc(prus->next, proto);
2177 if (dup_dup_mp = dupmsg(dup_mp)) {
2178 if (canputnext(prus->q)) {
2179 if (prus->flags & US_RAWDATA) {
2180 dup_dup_mp = prepend_ether(prus, dup_dup_mp, proto);
2181 putnext(prus->q, dup_dup_mp);
2183 dup_dup_mp = prepend_udind(prus, dup_dup_mp, proto);
2184 putnext(prus->q, dup_dup_mp);
2187 DPRINT("ppp_urput: data to promisc q dropped\n");
2188 freemsg(dup_dup_mp);
2193 if (canputnext(prus->q)) {
2194 if (prus->flags & US_RAWDATA) {
2195 dup_mp = prepend_ether(prus, dup_mp, proto);
2196 putnext(prus->q, dup_mp);
2198 dup_mp = prepend_udind(prus, dup_mp, proto);
2199 putnext(prus->q, dup_mp);
2202 DPRINT("ppp_urput: data to promisc q dropped\n");
2208 #endif /* defined(SOL2) */
2211 * We simply put the message on to the associated upper control stream
2212 * (either here or in ppplrsrv). That way we enter the perimeters
2213 * before looking through the list of attached streams to decide which
2214 * stream it should go up.
2224 switch (mp->b_datap->db_type) {
2226 iop = (struct iocblk *) mp->b_rptr;
2227 iop->ioc_error = EINVAL;
2228 mp->b_datap->db_type = M_IOCNAK;
2232 if (*mp->b_rptr & FLUSHR)
2233 flushq(q, FLUSHDATA);
2234 if (*mp->b_rptr & FLUSHW) {
2235 *mp->b_rptr &= ~FLUSHR;
2243 * If we can't get the lower lock straight away, queue this one
2244 * rather than blocking, to avoid the possibility of deadlock.
2246 if (!TRYLOCK_LOWER_R) {
2252 * Check that we're still connected to the driver.
2254 uq = (queue_t *) q->q_ptr;
2257 DPRINT1("ppplrput: q = %x, uq = 0??\n", q);
2263 * Try to forward the message to the put routine for the upper
2264 * control stream for this lower stream.
2265 * If there are already messages queued here, queue this one so
2266 * they don't get out of order.
2268 if (queclass(mp) == QPCTL || (qsize(q) == 0 && canput(uq)))
2285 * Packets get queued here for flow control reasons
2286 * or if the lrput routine couldn't get the lower lock
2290 uq = (queue_t *) q->q_ptr;
2293 flushq(q, FLUSHALL);
2294 DPRINT1("ppplrsrv: q = %x, uq = 0??\n", q);
2297 while ((mp = getq(q)) != 0) {
2298 if (queclass(mp) == QPCTL || canput(uq))
2310 putctl2(q, type, code, val)
2312 int type, code, val;
2316 mp = allocb(2, BPRI_HI);
2319 mp->b_datap->db_type = type;
2320 mp->b_wptr[0] = code;
2321 mp->b_wptr[1] = val;
2328 putctl4(q, type, code, val)
2330 int type, code, val;
2334 mp = allocb(4, BPRI_HI);
2337 mp->b_datap->db_type = type;
2338 mp->b_wptr[0] = code;
2339 ((short *)mp->b_wptr)[1] = val;
2353 DPRINT("ppp upper streams:\n");
2354 for (us = minor_devs; us != 0; us = us->nextmn) {
2356 DPRINT3(" %d: q=%x rlev=%d",
2357 us->mn, uq, (uq? qsize(uq): 0));
2358 DPRINT3(" wlev=%d flags=0x%b", (uq? qsize(WR(uq)): 0),
2359 us->flags, "\020\1priv\2control\3blocked\4last");
2360 DPRINT3(" state=%x sap=%x req_sap=%x", us->state, us->sap,
2365 DPRINT1(" ppa=%d\n", us->ppa->ppa_id);
2366 if (us->flags & US_CONTROL) {
2368 DPRINT3(" control for %d lq=%x rlev=%d",
2369 us->ppa_id, lq, (lq? qsize(RD(lq)): 0));
2370 DPRINT3(" wlev=%d mru=%d mtu=%d\n",
2371 (lq? qsize(lq): 0), us->mru, us->mtu);
2374 mp->b_datap->db_type = M_IOCACK;
2378 #ifdef FILTER_PACKETS
2379 #include <netinet/in_systm.h>
2380 #include <netinet/ip.h>
2381 #include <netinet/udp.h>
2382 #include <netinet/tcp.h>
2384 #define MAX_IPHDR 128 /* max TCP/IP header size */
2387 /* The following table contains a hard-coded list of protocol/port pairs.
2388 * Any matching packets are either discarded unconditionally, or,
2389 * if ok_if_link_up is non-zero when a connection does not currently exist
2390 * (i.e., they go through if the connection is present, but never initiate
2392 * This idea came from a post by dm@garage.uun.org (David Mazieres)
2394 static struct pktfilt_tab {
2397 u_short ok_if_link_up;
2399 { IPPROTO_UDP, 520, 1 }, /* RIP, ok to pass if link is up */
2400 { IPPROTO_UDP, 123, 1 }, /* NTP, don't keep up the link for it */
2401 { -1, 0, 0 } /* terminator entry has port == -1 */
2406 ip_hard_filter(us, mp, outbound)
2412 struct pktfilt_tab *pft;
2418 /* Note, the PPP header has already been pulled up in all cases */
2419 proto = PPP_PROTOCOL(mp->b_rptr);
2420 if (us->flags & US_DBGLOG)
2421 DPRINT3("ppp/%d: filter, proto=0x%x, out=%d\n", us->mn, proto, outbound);
2426 if ((mp->b_wptr - mp->b_rptr) == PPP_HDRLEN && mp->b_cont != 0) {
2427 temp_mp = mp->b_cont;
2428 len = msgdsize(temp_mp);
2429 hlen = (len < MAX_IPHDR) ? len : MAX_IPHDR;
2430 PULLUP(temp_mp, hlen);
2432 DPRINT2("ppp/%d: filter, pullup next failed, len=%d\n",
2434 mp->b_cont = 0; /* PULLUP() freed the rest */
2438 ip = (struct ip *)mp->b_cont->b_rptr;
2442 hlen = (len < (PPP_HDRLEN+MAX_IPHDR)) ? len : (PPP_HDRLEN+MAX_IPHDR);
2445 DPRINT2("ppp/%d: filter, pullup failed, len=%d\n",
2449 ip = (struct ip *)(mp->b_rptr + PPP_HDRLEN);
2452 /* For IP traffic, certain packets (e.g., RIP) may be either
2453 * 1. ignored - dropped completely
2454 * 2. will not initiate a connection, but
2455 * will be passed if a connection is currently up.
2457 for (pft=pktfilt_tab; pft->proto != -1; pft++) {
2458 if (ip->ip_p == pft->proto) {
2459 switch(pft->proto) {
2461 if (((struct udphdr *) &((int *)ip)[ip->ip_hl])->uh_dport
2462 == htons(pft->port)) goto endfor;
2465 if (((struct tcphdr *) &((int *)ip)[ip->ip_hl])->th_dport
2466 == htons(pft->port)) goto endfor;
2472 if (pft->proto != -1) {
2473 if (us->flags & US_DBGLOG)
2474 DPRINT3("ppp/%d: found IP pkt, proto=0x%x (%d)\n",
2475 us->mn, pft->proto, pft->port);
2476 /* Discard if not connected, or if not pass_with_link_up */
2477 /* else, if link is up let go by, but don't update time */
2478 return pft->ok_if_link_up? -1: 0;
2481 } /* end switch (proto) */
2485 #endif /* FILTER_PACKETS */