--- /dev/null
+#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/cmn_err.h>
+#include <sys/modctl.h>
+#include <sys/conf.h>
+#include <sys/ddi.h>
+#include <sys/sunddi.h>
+#include <sys/dlpi.h>
+#include <sys/ioccom.h>
+#include <net/ppp_defs.h>
+#include <net/pppio.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 65536
+#endif
+
+/*
+ * Private information; one per upper stream.
+ */
+struct upperstr {
+ minor_t mn; /* minor device number */
+ 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 */
+ struct upperstr *ppa; /* control stream for our ppa */
+ struct upperstr *next; /* next stream for this ppa */
+ /*
+ * 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 */
+};
+
+/* 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 stream */
+
+static void *upper_states;
+static struct upperstr *ppas;
+
+static int ppp_identify __P((dev_info_t *));
+static int ppp_attach __P((dev_info_t *, ddi_attach_cmd_t));
+static int ppp_detach __P((dev_info_t *, ddi_detach_cmd_t));
+static int ppp_devinfo __P((dev_info_t *, ddi_info_cmd_t, void *, void **));
+static int pppopen __P((queue_t *, dev_t *, int, int, cred_t *));
+static int pppclose __P((queue_t *, int, cred_t *));
+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 ppplrsrv __P((queue_t *));
+static int ppplwsrv __P((queue_t *));
+static void dlpi_request __P((queue_t *, mblk_t *, struct upperstr *));
+static void dlpi_error __P((queue_t *, int, int, int));
+static void dlpi_ok __P((queue_t *, int));
+static int send_data __P((mblk_t *, struct upperstr *));
+static void new_ppa __P((queue_t *, mblk_t *));
+static struct upperstr *find_dest __P((struct upperstr *, 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 = {
+ NULL, ppplwsrv, NULL, NULL, NULL, &ppp_info, NULL
+};
+
+static struct streamtab pppinfo = {
+ &pppurint, &pppuwint,
+ &ppplrint, &ppplwint
+};
+
+static dev_info_t *ppp_dip;
+
+static struct cb_ops cb_ppp_ops = {
+ nulldev, nulldev, nodev, nodev, /* cb_open, ... */
+ nodev, nodev, nodev, nodev, /* cb_dump, ... */
+ nodev, nodev, nodev, nochpoll, /* cb_devmap, ... */
+ ddi_prop_op, /* cb_prop_op */
+ &pppinfo, /* cb_stream */
+ D_NEW|D_MP|D_MTQPAIR|D_MTOUTPERIM|D_MTOCEXCL /* cb_flag */
+};
+
+static struct dev_ops ppp_ops = {
+ DEVO_REV, /* devo_rev */
+ 0, /* devo_refcnt */
+ ppp_devinfo, /* devo_getinfo */
+ ppp_identify, /* devo_identify */
+ nulldev, /* devo_probe */
+ ppp_attach, /* devo_attach */
+ ppp_detach, /* devo_detach */
+ nodev, /* devo_reset */
+ &cb_ppp_ops, /* devo_cb_ops */
+ NULL /* devo_bus_ops */
+};
+
+/*
+ * Module linkage information
+ */
+
+static struct modldrv modldrv = {
+ &mod_driverops, /* says this is a pseudo driver */
+ "PPP-2.2 multiplexing driver",
+ &ppp_ops /* driver ops */
+};
+
+static struct modlinkage modlinkage = {
+ MODREV_1,
+ (void *) &modldrv,
+ NULL
+};
+
+int
+_init(void)
+{
+ int error;
+
+ error = ddi_soft_state_init(&upper_states, sizeof(struct upperstr), 4);
+ if (!error) {
+ error = mod_install(&modlinkage);
+ if (!error)
+ return 0;
+ ddi_soft_state_fini(&upper_states);
+ }
+ return error;
+}
+
+int
+_fini(void)
+{
+ int error;
+
+ error = mod_remove(&modlinkage);
+ if (error)
+ return error;
+ ddi_soft_state_fini(&upper_states);
+ return 0;
+}
+
+int
+_info(mip)
+ struct modinfo *mip;
+{
+ return mod_info(&modlinkage, mip);
+}
+
+static int
+ppp_identify(dip)
+ dev_info_t *dip;
+{
+ return strcmp(ddi_get_name(dip), "ppp") == 0? DDI_IDENTIFIED:
+ DDI_NOT_IDENTIFIED;
+}
+
+static int
+ppp_attach(dip, cmd)
+ dev_info_t *dip;
+ ddi_attach_cmd_t cmd;
+{
+
+ if (cmd != DDI_ATTACH)
+ return DDI_FAILURE;
+ if (ddi_create_minor_node(dip, "ppp", S_IFCHR, 0, DDI_PSEUDO, CLONE_DEV)
+ == DDI_FAILURE) {
+ ddi_remove_minor_node(dip, NULL);
+ return DDI_FAILURE;
+ }
+ return DDI_SUCCESS;
+}
+
+static int
+ppp_detach(dip, cmd)
+ dev_info_t *dip;
+ ddi_detach_cmd_t cmd;
+{
+ ddi_remove_minor_node(dip, NULL);
+ return DDI_SUCCESS;
+}
+
+static int
+ppp_devinfo(dip, cmd, arg, result)
+ dev_info_t *dip;
+ ddi_info_cmd_t cmd;
+ void *arg;
+ void **result;
+{
+ int error;
+
+ error = DDI_SUCCESS;
+ switch (cmd) {
+ case DDI_INFO_DEVT2DEVINFO:
+ if (ppp_dip == NULL)
+ error = DDI_FAILURE;
+ else
+ *result = (void *) ppp_dip;
+ break;
+ case DDI_INFO_DEVT2INSTANCE:
+ *result = NULL;
+ break;
+ default:
+ error = DDI_FAILURE;
+ }
+ return error;
+}
+
+static int
+pppopen(q, devp, oflag, sflag, credp)
+ queue_t *q;
+ dev_t *devp;
+ int oflag, sflag;
+ cred_t *credp;
+{
+ struct upperstr *up;
+ minor_t mn;
+
+ if (q->q_ptr)
+ return 0; /* device is already open */
+
+ if (sflag == CLONEOPEN) {
+ for (mn = 0; ddi_get_soft_state(upper_states, mn) != NULL; ++mn)
+ ;
+ } else {
+ mn = getminor(*devp);
+ }
+ cmn_err(CE_CONT, "pppopen: minor %d\n", mn);
+
+ /*
+ * Construct a new minor node.
+ */
+ if (ddi_soft_state_zalloc(upper_states, mn) != DDI_SUCCESS)
+ return ENXIO;
+ up = ddi_get_soft_state(upper_states, mn);
+ *devp = makedevice(getmajor(*devp), mn);
+ up->q = q;
+ up->mn = mn;
+ up->flags = 0;
+ if (drv_priv(credp) == 0)
+ up->flags |= US_PRIV;
+ up->state = DL_UNATTACHED;
+ up->sap = -1;
+ up->ppa = 0;
+ up->next = 0;
+ up->lowerq = 0;
+ q->q_ptr = up;
+ WR(q)->q_ptr = up;
+ noenable(WR(q));
+
+ qprocson(q);
+ return 0;
+}
+
+static int
+pppclose(q, flag, credp)
+ queue_t *q;
+ int flag;
+ cred_t *credp;
+{
+ struct upperstr *up, **upp;
+ struct upperstr *as, *asnext;
+ struct lowerstr *ls;
+
+ qprocsoff(q);
+
+ up = (struct upperstr *) q->q_ptr;
+ cmn_err(CE_CONT, "pppclose: minor %d\n", up->mn);
+ if (up->flags & US_CONTROL) {
+ /*
+ * 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;
+ }
+
+ } 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;
+ }
+ }
+ }
+
+ q->q_ptr = NULL;
+ WR(q)->q_ptr = NULL;
+ ddi_soft_state_free(upper_states, up->mn);
+
+ 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;
+{
+ struct upperstr *us, *usnext;
+ struct iocblk *iop;
+ struct linkblk *lb;
+ queue_t *lq;
+ int error;
+ mblk_t *mq;
+
+ us = (struct upperstr *) q->q_ptr;
+ switch (mp->b_datap->db_type) {
+ case M_PCPROTO:
+ case M_PROTO:
+ dlpi_request(q, mp, us);
+ break;
+
+ case M_DATA:
+ if (!send_data(mp, us))
+ putq(q, mp);
+ break;
+
+ case M_IOCTL:
+ iop = (struct iocblk *) mp->b_rptr;
+ cmn_err(CE_CONT, "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)
+ goto iocnak;
+ lb = (struct linkblk *) mp->b_cont->b_rptr;
+ us->lowerq = lq = lb->l_qbot;
+ lq->q_ptr = us;
+ WR(lq)->q_ptr = us;
+ iop->ioc_count = 0;
+ mp->b_datap->db_type = M_IOCACK;
+ qreply(q, mp);
+ /* Unblock upper streams which now feed this lower stream. */
+ qenable(lq);
+ break;
+
+ case I_UNLINK:
+ lb = (struct linkblk *) mp->b_cont->b_rptr;
+ if (us->lowerq != lb->l_qbot)
+ cmn_err(CE_CONT, "ppp unlink: lowerq=%x qbot=%x\n",
+ us->lowerq, lb->l_qbot);
+ us->lowerq = 0;
+ iop->ioc_count = 0;
+ mp->b_datap->db_type = M_IOCACK;
+ qreply(q, mp);
+ /* Unblock streams which now feed back up the control stream. */
+ qenable(us->q);
+ break;
+
+ case PPPIO_NEWPPA:
+ if (us->flags & US_CONTROL)
+ goto iocnak;
+ if ((us->flags & US_PRIV) == 0) {
+ iop->ioc_error = EPERM;
+ goto iocnak;
+ }
+ /* 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) {
+ iop->ioc_error = ENOSR;
+ goto iocnak;
+ }
+ 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);
+ break;
+
+ default:
+ if (us->ppa == 0 || us->ppa->lowerq == 0)
+ goto iocnak;
+ switch (iop->ioc_cmd) {
+ case PPPIO_GETSTAT:
+ case PPPIO_GETCSTAT:
+ break;
+ default:
+ if ((us->flags & US_PRIV) == 0) {
+ iop->ioc_error = EPERM;
+ goto iocnak;
+ }
+ }
+ putnext(us->ppa->lowerq, mp);
+ break;
+
+ iocnak:
+ mp->b_datap->db_type = M_IOCNAK;
+ qreply(q, mp);
+ break;
+ }
+ break;
+
+ case M_FLUSH:
+ 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;
+}
+
+static void
+dlpi_request(q, mp, us)
+ queue_t *q;
+ mblk_t *mp;
+ struct upperstr *us;
+{
+ union DL_primitives *d = (union DL_primitives *) mp->b_rptr;
+ int size = mp->b_wptr - mp->b_rptr;
+ mblk_t *reply, *np;
+ struct upperstr *t, *ppa;
+ int sap;
+ dl_info_ack_t *info;
+ dl_bind_ack_t *ackp;
+ dl_phys_addr_ack_t *adrp;
+
+ cmn_err(CE_CONT, "ppp%d dlpi prim %x, state=%x\n", us->mn,
+ d->dl_primitive, us->state);
+ 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);
+ info->dl_mac_type = DL_OTHER;
+ info->dl_current_state = us->state;
+ info->dl_sap_length = sizeof(ulong);
+ info->dl_service_mode = DL_CLDLS;
+ info->dl_provider_style = DL_STYLE2;
+ info->dl_version = DL_CURRENT_VERSION;
+ 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;
+ us->state = DL_UNBOUND;
+ for (t = ppa; t->next != 0; t = t->next)
+ ;
+ t->next = us;
+ us->next = 0;
+ dlpi_ok(q, DL_ATTACH_REQ);
+ 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;
+ }
+ 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;
+ us->state = DL_UNATTACHED;
+ dlpi_ok(q, DL_DETACH_REQ);
+ break;
+
+ case DL_BIND_REQ:
+ if (size < sizeof(dl_bind_req_t))
+ goto badprim;
+ if (us->state != DL_UNBOUND) {
+ 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 */
+ sap = d->bind_req.dl_sap;
+ cmn_err(CE_CONT, "ppp bind %x\n", sap);
+ if (sap == ETHERTYPE_IP)
+ sap = PPP_IP;
+ if (sap < 0x21 || sap > 0x3fff
+ || (sap & 1) == 0 || (sap & 0x100) != 0) {
+ dlpi_error(q, DL_BIND_REQ, DL_BADADDR, 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;
+ 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;
+ }
+ /* 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;
+ }
+ /* XXX should use dl_dest_addr_offset/length here */
+ 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;
+
+ 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_CONNECT_REQ:
+ case DL_TOKEN_REQ:
+ case DL_REPLY_UPDATE_REQ:
+ case DL_GET_STATISTICS_REQ:
+ case DL_REPLY_REQ:
+ case DL_DATA_ACK_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;
+
+ case DL_TEST_RES:
+ case DL_XID_RES:
+ break;
+
+ default:
+ 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);
+}
+
+static int
+send_data(mp, us)
+ mblk_t *mp;
+ struct upperstr *us;
+{
+ queue_t *q;
+ struct upperstr *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 */
+ q = ppa->q;
+ }
+ if (canputnext(q)) {
+ putnext(q, mp);
+ return 1;
+ }
+ us->flags |= US_BLOCKED;
+ return 0;
+}
+
+static void
+new_ppa(q, mp)
+ queue_t *q;
+ mblk_t *mp;
+{
+ struct upperstr *us, **usp;
+ int ppa_id;
+
+ /*
+ * Allocate a new PPA id and link this stream into
+ * the list of PPAs.
+ */
+ usp = &ppas;
+ ppa_id = 0;
+ while ((us = *usp) != 0 && ppa_id == us->ppa_id) {
+ ++ppa_id;
+ usp = &us->nextppa;
+ }
+ us = (struct upperstr *) q->q_ptr;
+ us->ppa_id = ppa_id;
+ us->ppa = us;
+ us->next = 0;
+ us->nextppa = *usp;
+ *usp = us;
+ us->flags |= US_CONTROL;
+
+ *(int *)mp->b_cont->b_rptr = ppa_id;
+ mp->b_datap->db_type = M_IOCACK;
+ qreply(q, mp);
+}
+
+static int
+pppuwsrv(q)
+ queue_t *q;
+{
+ struct upperstr *us;
+ struct lowerstr *ls;
+ queue_t *lwq;
+ mblk_t *mp;
+
+ us = (struct upperstr *) q->q_ptr;
+ while ((mp = getq(q)) != 0) {
+ if (!send_data(mp, us)) {
+ putbq(q, mp);
+ break;
+ }
+ }
+ return 0;
+}
+
+static int
+ppplwsrv(q)
+ queue_t *q;
+{
+ struct upperstr *us;
+
+ /*
+ * Flow control has back-enabled this stream:
+ * enable the write service procedures of all upper
+ * streams feeding this lower stream.
+ */
+ for (us = (struct upperstr *) 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;
+{
+ struct upperstr *us, *as;
+ mblk_t *mp, *hdr;
+ dl_unitdata_ind_t *ud;
+ int proto;
+
+ /*
+ * If this is a control stream and we don't have a lower queue attached,
+ * run the write service routines of other streams attached to this PPA.
+ */
+ us = (struct upperstr *) 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.
+ */
+ while ((mp = getq(q)) != 0) {
+ if (!canputnext(q)) {
+ putbq(q, mp);
+ break;
+ }
+ 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;
+ }
+ 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);
+ ud->dl_group_address = 0;
+ ((ulong *)(ud + 1))[0] = proto; /* dest SAP */
+ ((ulong *)(ud + 1))[1] = proto; /* src SAP */
+ putnext(q, mp);
+ }
+ }
+ return 0;
+}
+
+static struct upperstr *
+find_dest(ppa, proto)
+ struct upperstr *ppa;
+ int proto;
+{
+ struct upperstr *us;
+
+ for (us = ppa->next; us != 0; us = us->next)
+ if (proto == us->sap)
+ return us;
+ return 0;
+}
+
+static int
+ppplrput(q, mp)
+ queue_t *q;
+ mblk_t *mp;
+{
+ struct upperstr *ppa, *us;
+ queue_t *uq;
+ int proto;
+
+ ppa = (struct upperstr *) q->q_ptr;
+ 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;
+
+ default:
+ if (mp->b_datap->db_type == M_DATA
+ && (proto = PPP_PROTOCOL(mp->b_rptr)) < 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;
+ } else {
+ /*
+ * A control frame, a frame for an unknown protocol,
+ * or some other message type.
+ * Send it up to pppd via the control stream.
+ */
+ if (mp->b_datap->db_type >= 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;
+ struct upperstr *ppa, *us;
+ int proto;
+
+ /*
+ * Packets only get queued here for flow control reasons.
+ */
+ ppa = (struct upperstr *) 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;
+}
projects / ppp.git / blobdiff