X-Git-Url: http://git.ozlabs.org/?p=ppp.git;a=blobdiff_plain;f=svr4%2Fppp.c;fp=svr4%2Fppp.c;h=4b6665819e730173904228dbc81db320d4a88806;hp=0000000000000000000000000000000000000000;hb=eeeeae4502021b0dac85d3212f1b25a94496ee94;hpb=35f06b7c87653ff6e12b6ec95d046d70fc165b5c diff --git a/svr4/ppp.c b/svr4/ppp.c new file mode 100644 index 0000000..4b66658 --- /dev/null +++ b/svr4/ppp.c @@ -0,0 +1,961 @@ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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; +}