+/*
+ * ppp.c - STREAMS multiplexing pseudo-device driver for PPP.
+ *
+ * Copyright (c) 1994 The Australian National University.
+ * All rights reserved.
+ *
+ * Permission to use, copy, modify, and distribute this software and its
+ * documentation is hereby granted, provided that the above copyright
+ * notice appears in all copies. This software is provided without any
+ * warranty, express or implied. The Australian National University
+ * makes no representations about the suitability of this software for
+ * any purpose.
+ *
+ * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY
+ * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
+ * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
+ * THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO
+ * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
+ * OR MODIFICATIONS.
+ *
+ * $Id: ppp.c,v 1.1 1995/12/11 05:06:40 paulus Exp $
+ */
+
+/*
+ * This file is used under Solaris 2 and SunOS 4.
+ */
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/stat.h>
+#include <sys/stream.h>
+#include <sys/stropts.h>
+#include <sys/errno.h>
+#include <sys/ioccom.h>
+#ifdef SVR4
+#include <sys/cmn_err.h>
+#include <sys/conf.h>
+#include <sys/dlpi.h>
+#include <sys/ddi.h>
+#ifdef SOL2
+#include <sys/kstat.h>
+#include <sys/sunddi.h>
+#else
+#include <sys/socket.h>
+#include <sys/sockio.h>
+#include <net/if.h>
+#include <netinet/in.h>
+#endif /* SOL2 */
+#else /* not SVR4 */
+#include <sys/user.h>
+#endif /* SVR4 */
+#include <net/ppp_defs.h>
+#include <net/pppio.h>
+#include "ppp_mod.h"
+
+#ifdef __STDC__
+#define __P(x) x
+#else
+#define __P(x) ()
+#endif
+
+/*
+ * The IP module uses this SAP value for IP packets.
+ */
+#ifndef ETHERTYPE_IP
+#define ETHERTYPE_IP 0x800
+#endif
+
+#ifndef PPP_MAXMTU
+#define PPP_MAXMTU 65535
+#endif
+
+/*
+ * Private information; one per upper stream.
+ */
+typedef struct upperstr {
+ minor_t mn; /* minor device number */
+ struct upperstr *nextmn; /* next minor device */
+ queue_t *q; /* read q associated with this upper stream */
+ int flags; /* flag bits, see below */
+ int state; /* current DLPI state */
+ int sap; /* service access point */
+ int req_sap; /* which SAP the DLPI client requested */
+ struct upperstr *ppa; /* control stream for our ppa */
+ struct upperstr *next; /* next stream for this ppa */
+ uint ioc_id; /* last ioctl ID for this stream */
+ /*
+ * There is exactly one control stream for each PPA.
+ * The following fields are only used for control streams.
+ */
+ int ppa_id;
+ queue_t *lowerq; /* write queue attached below this PPA */
+ struct upperstr *nextppa; /* next control stream */
+ int mru;
+ int mtu;
+ struct pppstat stats; /* statistics */
+#ifdef SOL2
+ kstat_t *kstats; /* stats for netstat */
+#endif /* SOL2 */
+#ifdef LACHTCP
+ int ifflags;
+ char ifname[IFNAMSIZ];
+ struct ifstats ifstats;
+#endif /* LACHTCP */
+} upperstr_t;
+
+/* Values for flags */
+#define US_PRIV 1 /* stream was opened by superuser */
+#define US_CONTROL 2 /* stream is a control stream */
+#define US_BLOCKED 4 /* flow ctrl has blocked lower write stream */
+#define US_LASTMOD 8 /* no PPP modules below us */
+#define US_DBGLOG 0x10 /* log various occurrences */
+
+static upperstr_t *minor_devs = NULL;
+static upperstr_t *ppas = NULL;
+
+#ifdef SVR4
+static int pppopen __P((queue_t *, dev_t *, int, int, cred_t *));
+static int pppclose __P((queue_t *, int, cred_t *));
+#else
+static int pppopen __P((queue_t *, int, int, int));
+static int pppclose __P((queue_t *, int));
+#endif /* SVR4 */
+static int pppuwput __P((queue_t *, mblk_t *));
+static int pppursrv __P((queue_t *));
+static int pppuwsrv __P((queue_t *));
+static int ppplrput __P((queue_t *, mblk_t *));
+static int ppplwput __P((queue_t *, mblk_t *));
+static int ppplrsrv __P((queue_t *));
+static int ppplwsrv __P((queue_t *));
+#ifndef NO_DLPI
+static void dlpi_request __P((queue_t *, mblk_t *, upperstr_t *));
+static void dlpi_error __P((queue_t *, int, int, int));
+static void dlpi_ok __P((queue_t *, int));
+#endif
+static int send_data __P((mblk_t *, upperstr_t *));
+static void new_ppa __P((queue_t *, mblk_t *));
+static void attach_ppa __P((queue_t *, mblk_t *));
+static void detach_ppa __P((queue_t *, mblk_t *));
+static void debug_dump __P((queue_t *, mblk_t *));
+static upperstr_t *find_dest __P((upperstr_t *, int));
+static int putctl2 __P((queue_t *, int, int, int));
+static int putctl4 __P((queue_t *, int, int, int));
+
+static struct module_info ppp_info = {
+ 0xb1a6, "ppp", 0, 512, 512, 128
+};
+
+static struct qinit pppurint = {
+ NULL, pppursrv, pppopen, pppclose, NULL, &ppp_info, NULL
+};
+
+static struct qinit pppuwint = {
+ pppuwput, pppuwsrv, NULL, NULL, NULL, &ppp_info, NULL
+};
+
+static struct qinit ppplrint = {
+ ppplrput, ppplrsrv, NULL, NULL, NULL, &ppp_info, NULL
+};
+
+static struct qinit ppplwint = {
+ ppplwput, ppplwsrv, NULL, NULL, NULL, &ppp_info, NULL
+};
+
+#ifdef LACHTCP
+extern struct ifstats *ifstats;
+int pppdevflag = 0;
+#endif
+
+struct streamtab pppinfo = {
+ &pppurint, &pppuwint,
+ &ppplrint, &ppplwint
+};
+
+int ppp_count;
+
+/*
+ * How we maintain statistics.
+ */
+#ifdef SOL2
+#define INCR_IPACKETS(ppa) \
+ if (ppa->kstats != 0) { \
+ KSTAT_NAMED_PTR(ppa->kstats)[0].value.ul++; \
+ }
+#define INCR_IERRORS(ppa) \
+ if (ppa->kstats != 0) { \
+ KSTAT_NAMED_PTR(ppa->kstats)[1].value.ul++; \
+ }
+#define INCR_OPACKETS(ppa) \
+ if (ppa->kstats != 0) { \
+ KSTAT_NAMED_PTR(ppa->kstats)[2].value.ul++; \
+ }
+#define INCR_OERRORS(ppa) \
+ if (ppa->kstats != 0) { \
+ KSTAT_NAMED_PTR(ppa->kstats)[3].value.ul++; \
+ }
+#endif
+
+#ifdef LACHTCP
+#define INCR_IPACKETS(ppa) ppa->ifstats.ifs_ipackets++;
+#define INCR_IERRORS(ppa) ppa->ifstats.ifs_ierrors++;
+#define INCR_OPACKETS(ppa) ppa->ifstats.ifs_opackets++;
+#define INCR_OERRORS(ppa) ppa->ifstats.ifs_oerrors++;
+#endif
+
+/*
+ * STREAMS driver entry points.
+ */
+static int
+#ifdef SVR4
+pppopen(q, devp, oflag, sflag, credp)
+ queue_t *q;
+ dev_t *devp;
+ int oflag, sflag;
+ cred_t *credp;
+#else
+pppopen(q, dev, oflag, sflag)
+ queue_t *q;
+ int dev; /* really dev_t */
+ int oflag, sflag;
+#endif
+{
+ upperstr_t *up;
+ upperstr_t **prevp;
+ minor_t mn;
+
+ if (q->q_ptr)
+ DRV_OPEN_OK(dev); /* device is already open */
+
+ if (sflag == CLONEOPEN) {
+ mn = 0;
+ for (prevp = &minor_devs; (up = *prevp) != 0; prevp = &up->nextmn) {
+ if (up->mn != mn)
+ break;
+ ++mn;
+ }
+ } else {
+#ifdef SVR4
+ mn = getminor(*devp);
+#else
+ mn = minor(dev);
+#endif
+ for (prevp = &minor_devs; (up = *prevp) != 0; prevp = &up->nextmn) {
+ if (up->mn >= mn)
+ break;
+ }
+ if (up->mn == mn) {
+ /* this can't happen */
+ q->q_ptr = WR(q)->q_ptr = (caddr_t) up;
+ DRV_OPEN_OK(dev);
+ }
+ }
+
+ /*
+ * Construct a new minor node.
+ */
+ up = (upperstr_t *) ALLOC_SLEEP(sizeof(upperstr_t));
+ bzero((caddr_t) up, sizeof(upperstr_t));
+ if (up == 0) {
+ DPRINT("pppopen: out of kernel memory\n");
+ OPEN_ERROR(ENXIO);
+ }
+ up->nextmn = *prevp;
+ *prevp = up;
+ up->mn = mn;
+#ifdef SVR4
+ *devp = makedevice(getmajor(*devp), mn);
+#endif
+ up->q = q;
+ if (NOTSUSER() == 0)
+ up->flags |= US_PRIV;
+#ifndef NO_DLPI
+ up->state = DL_UNATTACHED;
+#endif
+#ifdef LACHTCP
+ up->ifflags = IFF_UP | IFF_POINTOPOINT;
+#endif
+ up->sap = -1;
+ q->q_ptr = (caddr_t) up;
+ WR(q)->q_ptr = (caddr_t) up;
+ noenable(WR(q));
+ ++ppp_count;
+
+ qprocson(q);
+ DRV_OPEN_OK(makedev(major(dev), mn));
+}
+
+static int
+#ifdef SVR4
+pppclose(q, flag, credp)
+ queue_t *q;
+ int flag;
+ cred_t *credp;
+#else
+pppclose(q, flag)
+ queue_t *q;
+ int flag;
+#endif
+{
+ upperstr_t *up, **upp;
+ upperstr_t *as, *asnext;
+ upperstr_t **prevp;
+
+ qprocsoff(q);
+
+ up = (upperstr_t *) q->q_ptr;
+ if (up->flags & US_DBGLOG)
+ DPRINT2("ppp/%d: close, flags=%x\n", up->mn, up->flags);
+ if (up == 0)
+ return 0;
+ if (up->flags & US_CONTROL) {
+#ifdef LACHTCP
+ struct ifstats *ifp, *pifp;
+#endif
+ /*
+ * This stream represents a PPA:
+ * For all streams attached to the PPA, clear their
+ * references to this PPA.
+ * Then remove this PPA from the list of PPAs.
+ */
+ for (as = up->next; as != 0; as = asnext) {
+ asnext = as->next;
+ as->next = 0;
+ as->ppa = 0;
+ if (as->flags & US_BLOCKED) {
+ as->flags &= ~US_BLOCKED;
+ flushq(WR(as->q), FLUSHDATA);
+ }
+ }
+ for (upp = &ppas; *upp != 0; upp = &(*upp)->nextppa)
+ if (*upp == up) {
+ *upp = up->nextppa;
+ break;
+ }
+#ifdef LACHTCP
+ /* Remove the statistics from the active list. */
+ for (ifp = ifstats, pifp = 0; ifp; ifp = ifp->ifs_next) {
+ if (ifp == &up->ifstats) {
+ if (pifp)
+ pifp->ifs_next = ifp->ifs_next;
+ else
+ ifstats = ifp->ifs_next;
+ break;
+ }
+ pifp = ifp;
+ }
+#endif
+ } else {
+ /*
+ * If this stream is attached to a PPA,
+ * remove it from the PPA's list.
+ */
+ if ((as = up->ppa) != 0) {
+ for (; as->next != 0; as = as->next)
+ if (as->next == up) {
+ as->next = up->next;
+ break;
+ }
+ }
+ }
+
+#ifdef SOL2
+ if (up->kstats)
+ kstat_delete(up->kstats);
+#endif
+
+ q->q_ptr = NULL;
+ WR(q)->q_ptr = NULL;
+
+ for (prevp = &minor_devs; *prevp != 0; prevp = &(*prevp)->nextmn) {
+ if (*prevp == up) {
+ *prevp = up->nextmn;
+ break;
+ }
+ }
+ kmem_free(up, sizeof(upperstr_t));
+ --ppp_count;
+
+ return 0;
+}
+
+/*
+ * A message from on high. We do one of three things:
+ * - qreply()
+ * - put the message on the lower write stream
+ * - queue it for our service routine
+ */
+static int
+pppuwput(q, mp)
+ queue_t *q;
+ mblk_t *mp;
+{
+ upperstr_t *us, *usnext, *ppa, *os;
+ struct iocblk *iop;
+ struct linkblk *lb;
+#ifdef LACHTCP
+ struct ifreq *ifr;
+ int i;
+#endif
+ queue_t *lq;
+ int error, n;
+ mblk_t *mq;
+
+ us = (upperstr_t *) q->q_ptr;
+ switch (mp->b_datap->db_type) {
+#ifndef NO_DLPI
+ case M_PCPROTO:
+ case M_PROTO:
+ dlpi_request(q, mp, us);
+ break;
+#endif /* NO_DLPI */
+
+ case M_DATA:
+ if (us->flags & US_DBGLOG)
+ DPRINT3("ppp/%d: uwput M_DATA len=%d flags=%x\n",
+ us->mn, msgdsize(mp), us->flags);
+ if (us->ppa == 0 || msgdsize(mp) > us->ppa->mtu + PPP_HDRLEN
+#ifndef NO_DLPI
+ || (us->flags & US_CONTROL) == 0
+#endif /* NO_DLPI */
+ ) {
+ DPRINT1("pppuwput: junk data len=%d\n", msgdsize(mp));
+ freemsg(mp);
+ break;
+ }
+ if (!send_data(mp, us))
+ putq(q, mp);
+ break;
+
+ case M_IOCTL:
+ iop = (struct iocblk *) mp->b_rptr;
+ error = EINVAL;
+ if (us->flags & US_DBGLOG)
+ DPRINT3("ppp/%d: ioctl %x count=%d\n",
+ us->mn, iop->ioc_cmd, iop->ioc_count);
+ switch (iop->ioc_cmd) {
+ case I_LINK:
+ if ((us->flags & US_CONTROL) == 0 || us->lowerq != 0)
+ break;
+ lb = (struct linkblk *) mp->b_cont->b_rptr;
+ us->lowerq = lq = lb->l_qbot;
+ lq->q_ptr = (caddr_t) us;
+ RD(lq)->q_ptr = (caddr_t) us;
+ noenable(RD(lq));
+ flushq(RD(lq), FLUSHALL);
+ iop->ioc_count = 0;
+ error = 0;
+ us->flags &= ~US_LASTMOD;
+ /* Unblock upper streams which now feed this lower stream. */
+ qenable(lq);
+ /* Send useful information down to the modules which
+ are now linked below us. */
+ putctl2(lq, M_CTL, PPPCTL_UNIT, us->ppa_id);
+ putctl4(lq, M_CTL, PPPCTL_MRU, us->mru);
+ putctl4(lq, M_CTL, PPPCTL_MTU, us->mtu);
+ break;
+
+ case I_UNLINK:
+ lb = (struct linkblk *) mp->b_cont->b_rptr;
+#if DEBUG
+ if (us->lowerq != lb->l_qbot)
+ DPRINT2("ppp unlink: lowerq=%x qbot=%x\n",
+ us->lowerq, lb->l_qbot);
+#endif
+ us->lowerq = 0;
+ iop->ioc_count = 0;
+ error = 0;
+ /* Unblock streams which now feed back up the control stream. */
+ qenable(us->q);
+ break;
+
+ case PPPIO_NEWPPA:
+ if (us->flags & US_CONTROL)
+ break;
+ if ((us->flags & US_PRIV) == 0) {
+ error = EPERM;
+ break;
+ }
+ /* Arrange to return an int */
+ if ((mq = mp->b_cont) == 0
+ || mq->b_datap->db_lim - mq->b_rptr < sizeof(int)) {
+ mq = allocb(sizeof(int), BPRI_HI);
+ if (mq == 0) {
+ error = ENOSR;
+ break;
+ }
+ if (mp->b_cont != 0)
+ freemsg(mp->b_cont);
+ mp->b_cont = mq;
+ mq->b_cont = 0;
+ }
+ iop->ioc_count = sizeof(int);
+ mq->b_wptr = mq->b_rptr + sizeof(int);
+ qwriter(q, mp, new_ppa, PERIM_OUTER);
+ error = -1;
+ break;
+
+ case PPPIO_ATTACH:
+ /* like dlpi_attach, for programs which can't write to
+ the stream (like pppstats) */
+ if (iop->ioc_count != sizeof(int) || us->ppa != 0)
+ break;
+ n = *(int *)mp->b_cont->b_rptr;
+ for (ppa = ppas; ppa != 0; ppa = ppa->nextppa)
+ if (ppa->ppa_id == n)
+ break;
+ if (ppa == 0)
+ break;
+ us->ppa = ppa;
+ iop->ioc_count = 0;
+ qwriter(q, mp, attach_ppa, PERIM_OUTER);
+ error = -1;
+ break;
+
+#ifdef NO_DLPI
+ case PPPIO_BIND:
+ /* Attach to a given SAP. */
+ if (iop->ioc_count != sizeof(int) || us->ppa == 0)
+ break;
+ n = *(int *)mp->b_cont->b_rptr;
+ /* n must be a valid PPP network protocol number. */
+ if (n < 0x21 || n > 0x3fff || (n & 0x101) != 1)
+ break;
+ /* check that no other stream is bound to this sap already. */
+ for (os = us->ppa; os != 0; os = os->next)
+ if (os->sap == n)
+ break;
+ if (os != 0)
+ break;
+ us->sap = n;
+ iop->ioc_count = 0;
+ error = 0;
+ break;
+#endif /* NO_DLPI */
+
+ case PPPIO_MRU:
+ if (iop->ioc_count != sizeof(int) || (us->flags & US_CONTROL) == 0)
+ break;
+ n = *(int *)mp->b_cont->b_rptr;
+ if (n <= 0 || n > PPP_MAXMTU)
+ break;
+ if (n < PPP_MRU)
+ n = PPP_MRU;
+ us->mru = n;
+ if (us->lowerq)
+ putctl4(us->lowerq, M_CTL, PPPCTL_MRU, n);
+ error = 0;
+ iop->ioc_count = 0;
+ break;
+
+ case PPPIO_MTU:
+ if (iop->ioc_count != sizeof(int) || (us->flags & US_CONTROL) == 0)
+ break;
+ n = *(int *)mp->b_cont->b_rptr;
+ if (n <= 0 || n > PPP_MAXMTU)
+ break;
+ if (n < PPP_MRU)
+ n = PPP_MRU;
+ us->mtu = n;
+#ifdef LACHTCP
+ us->ifstats.ifs_mtu = n;
+#endif
+ if (us->lowerq)
+ putctl4(us->lowerq, M_CTL, PPPCTL_MTU, n);
+ error = 0;
+ iop->ioc_count = 0;
+ break;
+
+ case PPPIO_LASTMOD:
+ us->flags |= US_LASTMOD;
+ error = 0;
+ break;
+
+ case PPPIO_DEBUG:
+ if (iop->ioc_count != sizeof(int))
+ break;
+ n = *(int *)mp->b_cont->b_rptr;
+ if (n == PPPDBG_DUMP + PPPDBG_DRIVER) {
+ qwriter(q, NULL, debug_dump, PERIM_OUTER);
+ iop->ioc_count = 0;
+ error = 0;
+ } else if (n == PPPDBG_LOG + PPPDBG_DRIVER) {
+ DPRINT1("ppp/%d: debug log enabled\n", us->mn);
+ us->flags |= US_DBGLOG;
+ iop->ioc_count = 0;
+ error = 0;
+ } else {
+ if (us->ppa == 0 || us->ppa->lowerq == 0)
+ break;
+ putnext(us->ppa->lowerq, mp);
+ error = -1;
+ }
+ break;
+
+#ifdef LACHTCP
+ case SIOCSIFNAME:
+ printf("SIOCSIFNAME\n");
+ /* Sent from IP down to us. Attach the ifstats structure. */
+ if (iop->ioc_count != sizeof(struct ifreq) || us->ppa == 0)
+ break;
+ ifr = (struct ifreq *)mp->b_cont->b_rptr;
+ /* Find the unit number in the interface name. */
+ for (i = 0; i < IFNAMSIZ; i++) {
+ if (ifr->ifr_name[i] == 0 ||
+ (ifr->ifr_name[i] >= '0' &&
+ ifr->ifr_name[i] <= '9'))
+ break;
+ else
+ us->ifname[i] = ifr->ifr_name[i];
+ }
+ us->ifname[i] = 0;
+
+ /* Convert the unit number to binary. */
+ for (n = 0; i < IFNAMSIZ; i++) {
+ if (ifr->ifr_name[i] == 0) {
+ break;
+ }
+ else {
+ n = n * 10 + ifr->ifr_name[i] - '0';
+ }
+ }
+
+ /* Verify the ppa. */
+ if (us->ppa->ppa_id != n)
+ break;
+ ppa = us->ppa;
+
+ /* Set up the netstat block. */
+ strncpy (ppa->ifname, us->ifname, IFNAMSIZ);
+
+ ppa->ifstats.ifs_name = ppa->ifname;
+ ppa->ifstats.ifs_unit = n;
+ ppa->ifstats.ifs_active = us->state != DL_UNBOUND;
+ ppa->ifstats.ifs_mtu = ppa->mtu;
+
+ /* Link in statistics used by netstat. */
+ ppa->ifstats.ifs_next = ifstats;
+ ifstats = &ppa->ifstats;
+
+ iop->ioc_count = 0;
+ error = 0;
+ break;
+
+ case SIOCGIFFLAGS:
+ printf("SIOCGIFFLAGS\n");
+ if (!(us->flags & US_CONTROL)) {
+ if (us->ppa)
+ us = us->ppa;
+ else
+ break;
+ }
+ ((struct iocblk_in *)iop)->ioc_ifflags = us->ifflags;
+ error = 0;
+ break;
+
+ case SIOCSIFFLAGS:
+ printf("SIOCSIFFLAGS\n");
+ if (!(us->flags & US_CONTROL)) {
+ if (us->ppa)
+ us = us->ppa;
+ else
+ break;
+ }
+ us->ifflags = ((struct iocblk_in *)iop)->ioc_ifflags;
+ error = 0;
+ break;
+
+ case SIOCSIFADDR:
+ printf("SIOCSIFADDR\n");
+ if (!(us->flags & US_CONTROL)) {
+ if (us->ppa)
+ us = us->ppa;
+ else
+ break;
+ }
+ us->ifflags |= IFF_RUNNING;
+ ((struct iocblk_in *)iop)->ioc_ifflags |= IFF_RUNNING;
+ error = 0;
+ break;
+
+ case SIOCGIFNETMASK:
+ case SIOCSIFNETMASK:
+ case SIOCGIFADDR:
+ case SIOCGIFDSTADDR:
+ case SIOCSIFDSTADDR:
+ case SIOCGIFMETRIC:
+ error = 0;
+ break;
+#endif /* LACHTCP */
+
+ default:
+ if (us->ppa == 0 || us->ppa->lowerq == 0)
+ break;
+ us->ioc_id = iop->ioc_id;
+ error = -1;
+ switch (iop->ioc_cmd) {
+ case PPPIO_GETSTAT:
+ case PPPIO_GETCSTAT:
+ if (us->flags & US_LASTMOD) {
+ error = EINVAL;
+ break;
+ }
+ putnext(us->ppa->lowerq, mp);
+ break;
+ default:
+ if (us->flags & US_PRIV)
+ putnext(us->ppa->lowerq, mp);
+ else {
+ DPRINT1("ppp ioctl %x rejected\n", iop->ioc_cmd);
+ error = EPERM;
+ }
+ break;
+ }
+ break;
+ }
+
+ if (error > 0) {
+ iop->ioc_error = error;
+ mp->b_datap->db_type = M_IOCNAK;
+ qreply(q, mp);
+ } else if (error == 0) {
+ mp->b_datap->db_type = M_IOCACK;
+ qreply(q, mp);
+ }
+ break;
+
+ case M_FLUSH:
+ if (us->flags & US_DBGLOG)
+ DPRINT2("ppp/%d: flush %x\n", us->mn, *mp->b_rptr);
+ if (*mp->b_rptr & FLUSHW)
+ flushq(q, FLUSHDATA);
+ if (*mp->b_rptr & FLUSHR) {
+ *mp->b_rptr &= ~FLUSHW;
+ qreply(q, mp);
+ } else
+ freemsg(mp);
+ break;
+
+ default:
+ freemsg(mp);
+ break;
+ }
+ return 0;
+}
+
+#ifndef NO_DLPI
+static void
+dlpi_request(q, mp, us)
+ queue_t *q;
+ mblk_t *mp;
+ upperstr_t *us;
+{
+ union DL_primitives *d = (union DL_primitives *) mp->b_rptr;
+ int size = mp->b_wptr - mp->b_rptr;
+ mblk_t *reply, *np;
+ upperstr_t *ppa, *os;
+ int sap, *ip, len;
+ dl_info_ack_t *info;
+ dl_bind_ack_t *ackp;
+
+ if (us->flags & US_DBGLOG)
+ cmn_err(CE_CONT, "ppp/%d: dlpi prim %x len=%d\n", us->mn,
+ d->dl_primitive, size);
+ switch (d->dl_primitive) {
+ case DL_INFO_REQ:
+ if (size < sizeof(dl_info_req_t))
+ goto badprim;
+ if ((reply = allocb(sizeof(dl_info_ack_t), BPRI_HI)) == 0)
+ break; /* should do bufcall */
+ reply->b_datap->db_type = M_PCPROTO;
+ info = (dl_info_ack_t *) reply->b_wptr;
+ reply->b_wptr += sizeof(dl_info_ack_t);
+ bzero((caddr_t) info, sizeof(dl_info_ack_t));
+ info->dl_primitive = DL_INFO_ACK;
+ info->dl_max_sdu = PPP_MAXMTU;
+ info->dl_min_sdu = 1;
+ info->dl_addr_length = sizeof(ulong);
+#ifdef DL_OTHER
+ info->dl_mac_type = DL_OTHER;
+#else
+ info->dl_mac_type = DL_HDLC; /* a lie */
+#endif
+ info->dl_current_state = us->state;
+ info->dl_service_mode = DL_CLDLS;
+ info->dl_provider_style = DL_STYLE2;
+#if DL_CURRENT_VERSION >= 2
+ info->dl_sap_length = sizeof(ulong);
+ info->dl_version = DL_CURRENT_VERSION;
+#endif
+ qreply(q, reply);
+ break;
+
+ case DL_ATTACH_REQ:
+ if (size < sizeof(dl_attach_req_t))
+ goto badprim;
+ if (us->state != DL_UNATTACHED || us->ppa != 0) {
+ dlpi_error(q, DL_ATTACH_REQ, DL_OUTSTATE, 0);
+ break;
+ }
+ for (ppa = ppas; ppa != 0; ppa = ppa->nextppa)
+ if (ppa->ppa_id == d->attach_req.dl_ppa)
+ break;
+ if (ppa == 0) {
+ dlpi_error(q, DL_ATTACH_REQ, DL_BADPPA, 0);
+ break;
+ }
+ us->ppa = ppa;
+ qwriter(q, mp, attach_ppa, PERIM_OUTER);
+ break;
+
+ case DL_DETACH_REQ:
+ if (size < sizeof(dl_detach_req_t))
+ goto badprim;
+ if (us->state != DL_UNBOUND || us->ppa == 0) {
+ dlpi_error(q, DL_DETACH_REQ, DL_OUTSTATE, 0);
+ break;
+ }
+ qwriter(q, mp, detach_ppa, PERIM_OUTER);
+ break;
+
+ case DL_BIND_REQ:
+ if (size < sizeof(dl_bind_req_t))
+ goto badprim;
+ if (us->state != DL_UNBOUND || us->ppa == 0) {
+ dlpi_error(q, DL_BIND_REQ, DL_OUTSTATE, 0);
+ break;
+ }
+ if (d->bind_req.dl_service_mode != DL_CLDLS) {
+ dlpi_error(q, DL_BIND_REQ, DL_UNSUPPORTED, 0);
+ break;
+ }
+
+ /* saps must be valid PPP network protocol numbers,
+ except that we accept ETHERTYPE_IP in place of PPP_IP. */
+ sap = d->bind_req.dl_sap;
+ us->req_sap = sap;
+#if DEBUG
+ cmn_err(CE_CONT, "ppp bind %x\n", sap);
+#endif
+ if (sap == ETHERTYPE_IP)
+ sap = PPP_IP;
+ if (sap < 0x21 || sap > 0x3fff || (sap & 0x101) != 1) {
+ dlpi_error(q, DL_BIND_REQ, DL_BADADDR, 0);
+ break;
+ }
+
+ /* check that no other stream is bound to this sap already. */
+ for (os = us->ppa; os != 0; os = os->next)
+ if (os->sap == sap)
+ break;
+ if (os != 0) {
+ dlpi_error(q, DL_BIND_REQ, DL_NOADDR, 0);
+ break;
+ }
+
+ us->sap = sap;
+ us->state = DL_IDLE;
+
+ if ((reply = allocb(sizeof(dl_bind_ack_t) + sizeof(ulong),
+ BPRI_HI)) == 0)
+ break; /* should do bufcall */
+ ackp = (dl_bind_ack_t *) reply->b_wptr;
+ reply->b_wptr += sizeof(dl_bind_ack_t) + sizeof(ulong);
+ reply->b_datap->db_type = M_PCPROTO;
+ bzero((caddr_t) ackp, sizeof(dl_bind_ack_t));
+ ackp->dl_primitive = DL_BIND_ACK;
+ ackp->dl_sap = sap;
+ ackp->dl_addr_length = sizeof(ulong);
+ ackp->dl_addr_offset = sizeof(dl_bind_ack_t);
+ *(ulong *)(ackp+1) = sap;
+ qreply(q, reply);
+ break;
+
+ case DL_UNBIND_REQ:
+ if (size < sizeof(dl_unbind_req_t))
+ goto badprim;
+ if (us->state != DL_IDLE) {
+ dlpi_error(q, DL_UNBIND_REQ, DL_OUTSTATE, 0);
+ break;
+ }
+ us->sap = -1;
+ us->state = DL_UNBOUND;
+#ifndef sun
+ us->ppa->ifstats.ifs_active = 0;
+#endif
+ dlpi_ok(q, DL_UNBIND_REQ);
+ break;
+
+ case DL_UNITDATA_REQ:
+ if (size < sizeof(dl_unitdata_req_t))
+ goto badprim;
+ if (us->state != DL_IDLE) {
+ dlpi_error(q, DL_UNITDATA_REQ, DL_OUTSTATE, 0);
+ break;
+ }
+ if (us->ppa == 0) {
+ cmn_err(CE_CONT, "ppp: in state dl_idle but ppa == 0?\n");
+ break;
+ }
+ len = mp->b_cont == 0? 0: msgdsize(mp->b_cont);
+ if (len > us->ppa->mtu) {
+#if DEBUG
+ cmn_err(CE_CONT, "dlpi data too large (%d > %d)\n", len, us->mtu);
+#endif
+ break;
+ }
+ /* this assumes PPP_HDRLEN <= sizeof(dl_unitdata_req_t) */
+ if (mp->b_datap->db_ref > 1) {
+ np = allocb(PPP_HDRLEN, BPRI_HI);
+ if (np == 0)
+ break; /* gak! */
+ np->b_cont = mp->b_cont;
+ mp->b_cont = 0;
+ freeb(mp);
+ mp = np;
+ } else
+ mp->b_datap->db_type = M_DATA;
+ /* XXX should use dl_dest_addr_offset/length here,
+ but we would have to translate ETHERTYPE_IP -> PPP_IP */
+ mp->b_wptr = mp->b_rptr + PPP_HDRLEN;
+ mp->b_rptr[0] = PPP_ALLSTATIONS;
+ mp->b_rptr[1] = PPP_UI;
+ mp->b_rptr[2] = us->sap >> 8;
+ mp->b_rptr[3] = us->sap;
+ if (!send_data(mp, us))
+ putq(q, mp);
+ return;
+
+#if DL_CURRENT_VERSION >= 2
+ case DL_SUBS_BIND_REQ:
+ case DL_SUBS_UNBIND_REQ:
+ case DL_ENABMULTI_REQ:
+ case DL_DISABMULTI_REQ:
+ case DL_PROMISCON_REQ:
+ case DL_PROMISCOFF_REQ:
+ case DL_PHYS_ADDR_REQ:
+ case DL_SET_PHYS_ADDR_REQ:
+ case DL_XID_REQ:
+ case DL_TEST_REQ:
+ case DL_REPLY_UPDATE_REQ:
+ case DL_REPLY_REQ:
+ case DL_DATA_ACK_REQ:
+#endif
+ case DL_CONNECT_REQ:
+ case DL_TOKEN_REQ:
+ dlpi_error(q, d->dl_primitive, DL_NOTSUPPORTED, 0);
+ break;
+
+ case DL_CONNECT_RES:
+ case DL_DISCONNECT_REQ:
+ case DL_RESET_REQ:
+ case DL_RESET_RES:
+ dlpi_error(q, d->dl_primitive, DL_OUTSTATE, 0);
+ break;
+
+ case DL_UDQOS_REQ:
+ dlpi_error(q, d->dl_primitive, DL_BADQOSTYPE, 0);
+ break;
+
+#if DL_CURRENT_VERSION >= 2
+ case DL_TEST_RES:
+ case DL_XID_RES:
+ break;
+#endif
+
+ default:
+ cmn_err(CE_CONT, "ppp: unknown dlpi prim 0x%x\n", d->dl_primitive);
+ /* fall through */
+ badprim:
+ dlpi_error(q, d->dl_primitive, DL_BADPRIM, 0);
+ break;
+ }
+ freemsg(mp);
+}
+
+static void
+dlpi_error(q, prim, err, uerr)
+ queue_t *q;
+ int prim, err, uerr;
+{
+ mblk_t *reply;
+ dl_error_ack_t *errp;
+
+ reply = allocb(sizeof(dl_error_ack_t), BPRI_HI);
+ if (reply == 0)
+ return; /* XXX should do bufcall */
+ reply->b_datap->db_type = M_PCPROTO;
+ errp = (dl_error_ack_t *) reply->b_wptr;
+ reply->b_wptr += sizeof(dl_error_ack_t);
+ errp->dl_primitive = DL_ERROR_ACK;
+ errp->dl_error_primitive = prim;
+ errp->dl_errno = err;
+ errp->dl_unix_errno = uerr;
+ qreply(q, reply);
+}
+
+static void
+dlpi_ok(q, prim)
+ queue_t *q;
+ int prim;
+{
+ mblk_t *reply;
+ dl_ok_ack_t *okp;
+
+ reply = allocb(sizeof(dl_ok_ack_t), BPRI_HI);
+ if (reply == 0)
+ return; /* XXX should do bufcall */
+ reply->b_datap->db_type = M_PCPROTO;
+ okp = (dl_ok_ack_t *) reply->b_wptr;
+ reply->b_wptr += sizeof(dl_ok_ack_t);
+ okp->dl_primitive = DL_OK_ACK;
+ okp->dl_correct_primitive = prim;
+ qreply(q, reply);
+}
+#endif /* NO_DLPI */
+
+static int
+send_data(mp, us)
+ mblk_t *mp;
+ upperstr_t *us;
+{
+ queue_t *q;
+ upperstr_t *ppa;
+
+ if (us->flags & US_BLOCKED)
+ return 0;
+ ppa = us->ppa;
+ if (ppa == 0) {
+ freemsg(mp);
+ return 1;
+ }
+ if ((q = ppa->lowerq) == 0) {
+ /* try to send it up the control stream */
+ if (canputnext(ppa->q)) {
+ putnext(ppa->q, mp);
+ return 1;
+ }
+ } else {
+ if (canputnext(ppa->lowerq)) {
+ /*
+ * The lower write queue's put procedure just updates counters
+ * and does a putnext. We call it so that on SMP systems, we
+ * enter the lower queues' perimeter so that the counter
+ * updates are serialized.
+ */
+ put(ppa->lowerq, mp);
+ return 1;
+ }
+ }
+ us->flags |= US_BLOCKED;
+ return 0;
+}
+
+/*
+ * Allocate a new PPA id and link this stream into the list of PPAs.
+ * This procedure is called with an exclusive lock on all queues in
+ * this driver.
+ */
+static void
+new_ppa(q, mp)
+ queue_t *q;
+ mblk_t *mp;
+{
+ upperstr_t *us, **usp;
+ int ppa_id;
+
+ usp = &ppas;
+ ppa_id = 0;
+ while ((us = *usp) != 0 && ppa_id == us->ppa_id) {
+ ++ppa_id;
+ usp = &us->nextppa;
+ }
+ us = (upperstr_t *) q->q_ptr;
+ us->ppa_id = ppa_id;
+ us->ppa = us;
+ us->next = 0;
+ us->nextppa = *usp;
+ *usp = us;
+ us->flags |= US_CONTROL;
+
+ us->mtu = PPP_MRU;
+ us->mru = PPP_MRU;
+
+#ifdef SOL2
+ /*
+ * Create a kstats record for our statistics, so netstat -i works.
+ */
+ if (us->kstats == 0) {
+ char unit[32];
+
+ sprintf(unit, "ppp%d", us->ppa->ppa_id);
+ us->kstats = kstat_create("ppp", us->ppa->ppa_id, unit,
+ "net", KSTAT_TYPE_NAMED, 4, 0);
+ if (us->kstats != 0) {
+ kstat_named_t *kn = KSTAT_NAMED_PTR(us->kstats);
+
+ strcpy(kn[0].name, "ipackets");
+ kn[0].data_type = KSTAT_DATA_ULONG;
+ strcpy(kn[1].name, "ierrors");
+ kn[1].data_type = KSTAT_DATA_ULONG;
+ strcpy(kn[2].name, "opackets");
+ kn[2].data_type = KSTAT_DATA_ULONG;
+ strcpy(kn[3].name, "oerrors");
+ kn[3].data_type = KSTAT_DATA_ULONG;
+ kstat_install(us->kstats);
+ }
+ }
+#endif /* SOL2 */
+
+ *(int *)mp->b_cont->b_rptr = ppa_id;
+ mp->b_datap->db_type = M_IOCACK;
+ qreply(q, mp);
+}
+
+static void
+attach_ppa(q, mp)
+ queue_t *q;
+ mblk_t *mp;
+{
+ upperstr_t *us, *t;
+
+ us = (upperstr_t *) q->q_ptr;
+#ifndef NO_DLPI
+ us->state = DL_UNBOUND;
+#endif
+ for (t = us->ppa; t->next != 0; t = t->next)
+ ;
+ t->next = us;
+ us->next = 0;
+ if (mp->b_datap->db_type == M_IOCTL) {
+ mp->b_datap->db_type = M_IOCACK;
+ qreply(q, mp);
+ } else {
+#ifndef NO_DLPI
+ dlpi_ok(q, DL_ATTACH_REQ);
+#endif
+ }
+}
+
+static void
+detach_ppa(q, mp)
+ queue_t *q;
+ mblk_t *mp;
+{
+ upperstr_t *us, *t;
+
+ us = (upperstr_t *) q->q_ptr;
+ for (t = us->ppa; t->next != 0; t = t->next)
+ if (t->next == us) {
+ t->next = us->next;
+ break;
+ }
+ us->next = 0;
+ us->ppa = 0;
+#ifndef NO_DLPI
+ us->state = DL_UNATTACHED;
+ dlpi_ok(q, DL_DETACH_REQ);
+#endif
+}
+
+static int
+pppuwsrv(q)
+ queue_t *q;
+{
+ upperstr_t *us;
+ struct lowerstr *ls;
+ queue_t *lwq;
+ mblk_t *mp;
+
+ us = (upperstr_t *) q->q_ptr;
+ us->flags &= ~US_BLOCKED;
+ while ((mp = getq(q)) != 0) {
+ if (!send_data(mp, us)) {
+ putbq(q, mp);
+ break;
+ }
+ }
+ return 0;
+}
+
+static int
+ppplwput(q, mp)
+ queue_t *q;
+ mblk_t *mp;
+{
+ upperstr_t *ppa;
+
+ ppa = (upperstr_t *) q->q_ptr;
+ if (ppa != 0) { /* why wouldn't it? */
+ ppa->stats.ppp_opackets++;
+ ppa->stats.ppp_obytes += msgdsize(mp);
+#ifdef INCR_OPACKETS
+ INCR_OPACKETS(ppa);
+#endif
+ }
+ putnext(q, mp);
+ return 0;
+}
+
+static int
+ppplwsrv(q)
+ queue_t *q;
+{
+ upperstr_t *us;
+
+ /*
+ * Flow control has back-enabled this stream:
+ * enable the write service procedures of all upper
+ * streams feeding this lower stream.
+ */
+ for (us = (upperstr_t *) q->q_ptr; us != NULL; us = us->next)
+ if (us->flags & US_BLOCKED)
+ qenable(WR(us->q));
+ return 0;
+}
+
+static int
+pppursrv(q)
+ queue_t *q;
+{
+ upperstr_t *us, *as;
+ mblk_t *mp, *hdr;
+#ifndef NO_DLPI
+ dl_unitdata_ind_t *ud;
+#endif
+ int proto;
+
+ us = (upperstr_t *) q->q_ptr;
+ if (us->flags & US_CONTROL) {
+ /*
+ * A control stream.
+ * If there is no lower queue attached, run the write service
+ * routines of other upper streams attached to this PPA.
+ */
+ if (us->lowerq == 0) {
+ as = us;
+ do {
+ if (as->flags & US_BLOCKED)
+ qenable(WR(as->q));
+ as = as->next;
+ } while (as != 0);
+ }
+ } else {
+ /*
+ * A network protocol stream. Put a DLPI header on each
+ * packet and send it on.
+ * (Actually, it seems that the IP module will happily
+ * accept M_DATA messages without the DL_UNITDATA_IND header.)
+ */
+ while ((mp = getq(q)) != 0) {
+ if (!canputnext(q)) {
+ putbq(q, mp);
+ break;
+ }
+#ifndef NO_DLPI
+ proto = PPP_PROTOCOL(mp->b_rptr);
+ mp->b_rptr += PPP_HDRLEN;
+ hdr = allocb(sizeof(dl_unitdata_ind_t) + 2 * sizeof(ulong),
+ BPRI_MED);
+ if (hdr == 0) {
+ /* XXX should put it back and use bufcall */
+ freemsg(mp);
+ continue;
+ }
+ hdr->b_datap->db_type = M_PROTO;
+ ud = (dl_unitdata_ind_t *) hdr->b_wptr;
+ hdr->b_wptr += sizeof(dl_unitdata_ind_t) + 2 * sizeof(ulong);
+ hdr->b_cont = mp;
+ ud->dl_primitive = DL_UNITDATA_IND;
+ ud->dl_dest_addr_length = sizeof(ulong);
+ ud->dl_dest_addr_offset = sizeof(dl_unitdata_ind_t);
+ ud->dl_src_addr_length = sizeof(ulong);
+ ud->dl_src_addr_offset = ud->dl_dest_addr_offset + sizeof(ulong);
+#if DL_CURRENT_VERSION >= 2
+ ud->dl_group_address = 0;
+#endif
+ /* Send the DLPI client the data with the SAP they requested,
+ (e.g. ETHERTYPE_IP) rather than the PPP protocol number
+ (e.g. PPP_IP) */
+ ((ulong *)(ud + 1))[0] = us->req_sap; /* dest SAP */
+ ((ulong *)(ud + 1))[1] = us->req_sap; /* src SAP */
+ putnext(q, hdr);
+#else /* NO_DLPI */
+ putnext(q, mp);
+#endif /* NO_DLPI */
+ }
+ }
+
+ /*
+ * If this stream is attached to a PPA with a lower queue pair,
+ * enable the read queue's service routine if it has data queued.
+ * XXX there is a possibility that packets could get out of order
+ * if ppplrput now runs before ppplrsrv.
+ */
+ if (us->ppa != 0 && us->ppa->lowerq != 0)
+ qenable(RD(us->ppa->lowerq));
+
+ return 0;
+}
+
+static upperstr_t *
+find_dest(ppa, proto)
+ upperstr_t *ppa;
+ int proto;
+{
+ upperstr_t *us;
+
+ for (us = ppa->next; us != 0; us = us->next)
+ if (proto == us->sap)
+ break;
+ return us;
+}
+
+static int
+ppplrput(q, mp)
+ queue_t *q;
+ mblk_t *mp;
+{
+ upperstr_t *ppa, *us;
+ queue_t *uq;
+ int proto, len;
+ mblk_t *np;
+ struct iocblk *iop;
+
+ ppa = (upperstr_t *) q->q_ptr;
+ if (ppa == 0) {
+ DPRINT1("ppplrput: q = %x, ppa = 0??\n", q);
+ freemsg(mp);
+ return 0;
+ }
+ switch (mp->b_datap->db_type) {
+ case M_FLUSH:
+ if (*mp->b_rptr & FLUSHW) {
+ *mp->b_rptr &= ~FLUSHR;
+ qreply(q, mp);
+ } else
+ freemsg(mp);
+ break;
+
+ case M_CTL:
+ switch (*mp->b_rptr) {
+ case PPPCTL_IERROR:
+#ifdef INCR_IERRORS
+ INCR_IERRORS(ppa);
+#endif
+ ppa->stats.ppp_ierrors++;
+ break;
+ case PPPCTL_OERROR:
+#ifdef INCR_OERRORS
+ INCR_OERRORS(ppa);
+#endif
+ ppa->stats.ppp_oerrors++;
+ break;
+ }
+ freemsg(mp);
+ break;
+
+ case M_IOCACK:
+ case M_IOCNAK:
+ /*
+ * Attempt to match up the response with the stream
+ * that the request came from.
+ */
+ iop = (struct iocblk *) mp->b_rptr;
+ for (us = ppa; us != 0; us = us->next)
+ if (us->ioc_id == iop->ioc_id)
+ break;
+ if (us == 0)
+ freemsg(mp);
+ else
+ putnext(us->q, mp);
+ break;
+
+ default:
+ if (mp->b_datap->db_type == M_DATA) {
+ len = msgdsize(mp);
+ if (mp->b_wptr - mp->b_rptr < PPP_HDRLEN) {
+ PULLUP(mp, PPP_HDRLEN);
+ if (mp == 0) {
+ DPRINT1("ppp_lrput: msgpullup failed (len=%d)\n", len);
+ break;
+ }
+ }
+ ppa->stats.ppp_ipackets++;
+ ppa->stats.ppp_ibytes += len;
+#ifdef INCR_IPACKETS
+ INCR_IPACKETS(ppa);
+#endif
+ proto = PPP_PROTOCOL(mp->b_rptr);
+ if (proto < 0x8000 && (us = find_dest(ppa, proto)) != 0) {
+ /*
+ * A data packet for some network protocol.
+ * Queue it on the upper stream for that protocol.
+ */
+ if (canput(us->q))
+ putq(us->q, mp);
+ else
+ putq(q, mp);
+ break;
+ }
+ }
+ /*
+ * A control frame, a frame for an unknown protocol,
+ * or some other message type.
+ * Send it up to pppd via the control stream.
+ */
+ if (queclass(mp) == QPCTL || canputnext(ppa->q))
+ putnext(ppa->q, mp);
+ else
+ putq(q, mp);
+ break;
+ }
+
+ return 0;
+}
+
+static int
+ppplrsrv(q)
+ queue_t *q;
+{
+ mblk_t *mp;
+ upperstr_t *ppa, *us;
+ int proto;
+
+ /*
+ * Packets only get queued here for flow control reasons.
+ */
+ ppa = (upperstr_t *) q->q_ptr;
+ while ((mp = getq(q)) != 0) {
+ if (mp->b_datap->db_type == M_DATA
+ && (proto = PPP_PROTOCOL(mp->b_rptr)) < 0x8000
+ && (us = find_dest(ppa, proto)) != 0) {
+ if (canput(us->q))
+ putq(us->q, mp);
+ else {
+ putbq(q, mp);
+ break;
+ }
+ } else {
+ if (canputnext(ppa->q))
+ putnext(ppa->q, mp);
+ else {
+ putbq(q, mp);
+ break;
+ }
+ }
+ }
+ return 0;
+}
+
+static int
+putctl2(q, type, code, val)
+ queue_t *q;
+ int type, code, val;
+{
+ mblk_t *mp;
+
+ mp = allocb(2, BPRI_HI);
+ if (mp == 0)
+ return 0;
+ mp->b_datap->db_type = type;
+ mp->b_wptr[0] = code;
+ mp->b_wptr[1] = val;
+ mp->b_wptr += 2;
+ putnext(q, mp);
+ return 1;
+}
+
+static int
+putctl4(q, type, code, val)
+ queue_t *q;
+ int type, code, val;
+{
+ mblk_t *mp;
+
+ mp = allocb(4, BPRI_HI);
+ if (mp == 0)
+ return 0;
+ mp->b_datap->db_type = type;
+ mp->b_wptr[0] = code;
+ ((short *)mp->b_wptr)[1] = val;
+ mp->b_wptr += 4;
+ putnext(q, mp);
+ return 1;
+}
+
+static void
+debug_dump(q, mp)
+ queue_t *q; /* not used */
+ mblk_t *mp; /* not used either */
+{
+ upperstr_t *us;
+ queue_t *uq, *lq;
+
+ DPRINT("ppp upper streams:\n");
+ for (us = minor_devs; us != 0; us = us->nextmn) {
+ uq = us->q;
+ DPRINT3(" %d: q=%x rlev=%d",
+ us->mn, uq, (uq? qsize(uq): 0));
+ DPRINT3(" wlev=%d flags=0x%b", (uq? qsize(WR(uq)): 0),
+ us->flags, "\020\1priv\2control\3blocked\4last");
+ DPRINT3(" state=%x sap=%x req_sap=%x", us->state, us->sap,
+ us->req_sap);
+ if (us->ppa == 0)
+ DPRINT(" ppa=?\n");
+ else
+ DPRINT1(" ppa=%d\n", us->ppa->ppa_id);
+ if (us->flags & US_CONTROL) {
+ lq = us->lowerq;
+ DPRINT3(" control for %d lq=%x rlev=%d",
+ us->ppa_id, lq, (lq? qsize(RD(lq)): 0));
+ DPRINT3(" wlev=%d mru=%d mtu=%d\n",
+ (lq? qsize(lq): 0), us->mru, us->mtu);
+ }
+ }
+}