X-Git-Url: http://git.ozlabs.org/?p=ppp.git;a=blobdiff_plain;f=svr4%2Fppp.c;h=497a414c2a16c620893b6b4c5d823ea0dd38fd1d;hp=4b6665819e730173904228dbc81db320d4a88806;hb=ee1474450b851162a013af7d38433c261a1f72fc;hpb=eeeeae4502021b0dac85d3212f1b25a94496ee94 diff --git a/svr4/ppp.c b/svr4/ppp.c index 4b66658..497a414 100644 --- a/svr4/ppp.c +++ b/svr4/ppp.c @@ -1,3 +1,36 @@ +/* + * 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 1.5 1995/06/23 01:38:49 paulus Exp $ + */ + +/* + * This file is used under Solaris 2. + */ + #include #include #include @@ -5,12 +38,16 @@ #include #include #include -#include #include -#include -#include #include #include +#include +#include +#ifdef sun +#include +#include +#include +#endif #include #include @@ -28,20 +65,23 @@ #endif #ifndef PPP_MAXMTU -#define PPP_MAXMTU 65536 +#define PPP_MAXMTU 65535 #endif /* * Private information; one per upper stream. */ -struct upperstr { +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. @@ -49,34 +89,49 @@ struct upperstr { 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 sun + kstat_t *kstats; /* stats for netstat */ +#endif +} 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 stream */ +#define US_BLOCKED 4 /* flow ctrl has blocked lower write stream */ +#define US_LASTMOD 8 /* no PPP modules below us */ -static void *upper_states; -static struct upperstr *ppas; +static upperstr_t *minor_devs = NULL; +static upperstr_t *ppas = NULL; +#ifdef sun 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 **)); +#endif 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 ppplwput __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_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)); -static int send_data __P((mblk_t *, struct upperstr *)); +static int send_data __P((mblk_t *, upperstr_t *)); static void new_ppa __P((queue_t *, mblk_t *)); -static struct upperstr *find_dest __P((struct upperstr *, int)); +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 @@ -95,7 +150,7 @@ static struct qinit ppplrint = { }; static struct qinit ppplwint = { - NULL, ppplwsrv, NULL, NULL, NULL, &ppp_info, NULL + ppplwput, ppplwsrv, NULL, NULL, NULL, &ppp_info, NULL }; static struct streamtab pppinfo = { @@ -103,6 +158,7 @@ static struct streamtab pppinfo = { &ppplrint, &ppplwint }; +#ifdef sun static dev_info_t *ppp_dip; static struct cb_ops cb_ppp_ops = { @@ -146,28 +202,13 @@ static struct modlinkage modlinkage = { 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; + return mod_install(&modlinkage); } int _fini(void) { - int error; - - error = mod_remove(&modlinkage); - if (error) - return error; - ddi_soft_state_fini(&upper_states); - return 0; + return mod_remove(&modlinkage); } int @@ -235,6 +276,14 @@ ppp_devinfo(dip, cmd, arg, result) } return error; } +#endif /* sun */ + +#ifndef sun +# define qprocson(q) +# define qprocsoff(q) +# define canputnext(q) canput((q)->q_next) +# define qwriter(q, mp, func, scope) (func)((q), (mp)) +#endif static int pppopen(q, devp, oflag, sflag, credp) @@ -243,37 +292,50 @@ pppopen(q, devp, oflag, sflag, credp) int oflag, sflag; cred_t *credp; { - struct upperstr *up; + upperstr_t *up; + upperstr_t **prevp; 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) - ; + mn = 0; + for (prevp = &minor_devs; (up = *prevp) != 0; prevp = &up->nextmn) { + if (up->mn != mn) + break; + ++mn; + } } else { mn = getminor(*devp); + 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 = up; + return 0; + } } - cmn_err(CE_CONT, "pppopen: minor %d\n", mn); /* * Construct a new minor node. */ - if (ddi_soft_state_zalloc(upper_states, mn) != DDI_SUCCESS) + up = (upperstr_t *) kmem_zalloc(sizeof(upperstr_t), KM_SLEEP); + if (up == 0) { + cmn_err(CE_CONT, "pppopen: out of kernel memory\n"); return ENXIO; - up = ddi_get_soft_state(upper_states, mn); + } + up->nextmn = *prevp; + *prevp = up; + up->mn = 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)); @@ -288,14 +350,15 @@ pppclose(q, flag, credp) int flag; cred_t *credp; { - struct upperstr *up, **upp; - struct upperstr *as, *asnext; - struct lowerstr *ls; + upperstr_t *up, **upp; + upperstr_t *as, *asnext; + upperstr_t **prevp; qprocsoff(q); - up = (struct upperstr *) q->q_ptr; - cmn_err(CE_CONT, "pppclose: minor %d\n", up->mn); + up = (upperstr_t *) q->q_ptr; + if (up == 0) + return 0; if (up->flags & US_CONTROL) { /* * This stream represents a PPA: @@ -332,9 +395,21 @@ pppclose(q, flag, credp) } } +#ifdef sun + if (up->kstats) + kstat_delete(up->kstats); +#endif + q->q_ptr = NULL; WR(q)->q_ptr = NULL; - ddi_soft_state_free(upper_states, up->mn); + + for (prevp = &minor_devs; *prevp != 0; prevp = &(*prevp)->nextmn) { + if (*prevp == up) { + *prevp = up->nextmn; + break; + } + } + kmem_free(up, sizeof(upperstr_t)); return 0; } @@ -350,14 +425,14 @@ pppuwput(q, mp) queue_t *q; mblk_t *mp; { - struct upperstr *us, *usnext; + upperstr_t *us, *usnext, *ppa; struct iocblk *iop; struct linkblk *lb; queue_t *lq; - int error; + int error, n; mblk_t *mq; - us = (struct upperstr *) q->q_ptr; + us = (upperstr_t *) q->q_ptr; switch (mp->b_datap->db_type) { case M_PCPROTO: case M_PROTO: @@ -365,56 +440,70 @@ pppuwput(q, mp) break; case M_DATA: + if ((us->flags & US_CONTROL) == 0 + || msgdsize(mp) > us->mtu + PPP_HDRLEN) { +#if DEBUG + cmn_err(CE_CONT, "pppuwput: junk data len=%d\n", msgdsize(mp)); +#endif + freemsg(mp); + break; + } 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); + error = EINVAL; switch (iop->ioc_cmd) { case I_LINK: if ((us->flags & US_CONTROL) == 0 || us->lowerq != 0) - goto iocnak; + break; lb = (struct linkblk *) mp->b_cont->b_rptr; us->lowerq = lq = lb->l_qbot; lq->q_ptr = us; - WR(lq)->q_ptr = us; + RD(lq)->q_ptr = us; + noenable(RD(lq)); iop->ioc_count = 0; - mp->b_datap->db_type = M_IOCACK; - qreply(q, mp); + 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) cmn_err(CE_CONT, "ppp unlink: lowerq=%x qbot=%x\n", us->lowerq, lb->l_qbot); +#endif us->lowerq = 0; iop->ioc_count = 0; - mp->b_datap->db_type = M_IOCACK; - qreply(q, mp); + error = 0; /* Unblock streams which now feed back up the control stream. */ qenable(us->q); break; case PPPIO_NEWPPA: if (us->flags & US_CONTROL) - goto iocnak; + break; if ((us->flags & US_PRIV) == 0) { - iop->ioc_error = EPERM; - goto iocnak; + 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) { - iop->ioc_error = ENOSR; - goto iocnak; + error = ENOSR; + break; } if (mp->b_cont != 0) freemsg(mp->b_cont); @@ -424,28 +513,112 @@ pppuwput(q, mp) 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; + + 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; + 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 (us->ppa == 0 || us->ppa->lowerq == 0) + break; + putnext(us->ppa->lowerq, mp); + error = -1; + } break; default: if (us->ppa == 0 || us->ppa->lowerq == 0) - goto iocnak; + 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) == 0) { - iop->ioc_error = EPERM; - goto iocnak; + if (us->flags & US_PRIV) + putnext(us->ppa->lowerq, mp); + else { +#if DEBUG + cmn_err(CE_CONT, "ppp ioctl %x rejected\n", iop->ioc_cmd); +#endif + error = EPERM; } + break; } - putnext(us->ppa->lowerq, mp); break; + } - iocnak: + if (error > 0) { + iop->ioc_error = error; mp->b_datap->db_type = M_IOCNAK; qreply(q, mp); - break; + } else if (error == 0) { + mp->b_datap->db_type = M_IOCACK; + qreply(q, mp); } break; @@ -470,19 +643,16 @@ static void dlpi_request(q, mp, us) queue_t *q; mblk_t *mp; - struct upperstr *us; + 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; - struct upperstr *t, *ppa; - int sap; + upperstr_t *ppa, *os; + int sap, *ip, len; 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)) @@ -497,12 +667,18 @@ dlpi_request(q, mp, us) 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_sap_length = sizeof(ulong); 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; @@ -521,12 +697,7 @@ dlpi_request(q, mp, us) 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); + qwriter(q, mp, attach_ppa, PERIM_OUTER); break; case DL_DETACH_REQ: @@ -536,21 +707,13 @@ dlpi_request(q, mp, us) 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); + 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) { + if (us->state != DL_UNBOUND || us->ppa == 0) { dlpi_error(q, DL_BIND_REQ, DL_OUTSTATE, 0); break; } @@ -558,18 +721,33 @@ dlpi_request(q, mp, us) dlpi_error(q, DL_BIND_REQ, DL_UNSUPPORTED, 0); break; } - /* saps must be valid PPP network protocol numbers */ + + /* 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 & 1) == 0 || (sap & 0x100) != 0) { + 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 */ @@ -604,6 +782,17 @@ dlpi_request(q, mp, us) 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); @@ -613,8 +802,10 @@ dlpi_request(q, mp, us) mp->b_cont = 0; freeb(mp); mp = np; - } - /* XXX should use dl_dest_addr_offset/length here */ + } 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; @@ -624,22 +815,22 @@ dlpi_request(q, 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_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: +#endif + case DL_CONNECT_REQ: + case DL_TOKEN_REQ: dlpi_error(q, d->dl_primitive, DL_NOTSUPPORTED, 0); break; @@ -654,11 +845,15 @@ dlpi_request(q, mp, us) 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; @@ -709,10 +904,10 @@ dlpi_ok(q, prim) static int send_data(mp, us) mblk_t *mp; - struct upperstr *us; + upperstr_t *us; { queue_t *q; - struct upperstr *ppa; + upperstr_t *ppa; if (us->flags & US_BLOCKED) return 0; @@ -723,35 +918,45 @@ send_data(mp, us) } if ((q = ppa->lowerq) == 0) { /* try to send it up the control stream */ - q = ppa->q; - } - if (canputnext(q)) { - putnext(q, mp); - return 1; + 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 in order to 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; { - struct upperstr *us, **usp; + upperstr_t *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 = (upperstr_t *) q->q_ptr; us->ppa_id = ppa_id; us->ppa = us; us->next = 0; @@ -759,21 +964,88 @@ new_ppa(q, mp) *usp = us; us->flags |= US_CONTROL; + us->mtu = PPP_MRU; + us->mru = PPP_MRU; + +#ifdef sun + 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 + *(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; + us->state = DL_UNBOUND; + 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 { + dlpi_ok(q, DL_ATTACH_REQ); + } +} + +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; + us->state = DL_UNATTACHED; + dlpi_ok(q, DL_DETACH_REQ); +} + static int pppuwsrv(q) queue_t *q; { - struct upperstr *us; + upperstr_t *us; struct lowerstr *ls; queue_t *lwq; mblk_t *mp; - us = (struct upperstr *) q->q_ptr; + us = (upperstr_t *) q->q_ptr; + us->flags &= ~US_BLOCKED; while ((mp = getq(q)) != 0) { if (!send_data(mp, us)) { putbq(q, mp); @@ -783,18 +1055,38 @@ pppuwsrv(q) return 0; } +static int +ppplwput(q, mp) + queue_t *q; + mblk_t *mp; +{ + upperstr_t *ppa; + + ppa = q->q_ptr; + if (ppa != 0) { /* why wouldn't it? */ + ppa->stats.ppp_opackets++; + ppa->stats.ppp_obytes += msgdsize(mp); +#ifdef sun + if (ppa->kstats != 0) + KSTAT_NAMED_PTR(ppa->kstats)[2].value.ul++; +#endif + } + putnext(q, mp); + return 0; +} + static int ppplwsrv(q) queue_t *q; { - struct upperstr *us; + 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 = (struct upperstr *) q->q_ptr; us != NULL; us = us->next) + for (us = (upperstr_t *) q->q_ptr; us != NULL; us = us->next) if (us->flags & US_BLOCKED) qenable(WR(us->q)); return 0; @@ -804,16 +1096,12 @@ static int pppursrv(q) queue_t *q; { - struct upperstr *us, *as; + upperstr_t *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; + us = (upperstr_t *) q->q_ptr; if (us->flags & US_CONTROL) { /* * A control stream. @@ -832,6 +1120,8 @@ pppursrv(q) /* * 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)) { @@ -847,6 +1137,7 @@ pppursrv(q) 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; @@ -855,26 +1146,41 @@ pppursrv(q) 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; - ((ulong *)(ud + 1))[0] = proto; /* dest SAP */ - ((ulong *)(ud + 1))[1] = proto; /* src SAP */ - putnext(q, mp); +#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); } } + + /* + * 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 struct upperstr * +static upperstr_t * find_dest(ppa, proto) - struct upperstr *ppa; + upperstr_t *ppa; int proto; { - struct upperstr *us; + upperstr_t *us; for (us = ppa->next; us != 0; us = us->next) if (proto == us->sap) - return us; - return 0; + break; + return us; } static int @@ -882,11 +1188,20 @@ ppplrput(q, mp) queue_t *q; mblk_t *mp; { - struct upperstr *ppa, *us; + upperstr_t *ppa, *us; queue_t *uq; - int proto; + int proto, len; + mblk_t *np; + struct iocblk *iop; - ppa = (struct upperstr *) q->q_ptr; + ppa = (upperstr_t *) q->q_ptr; + if (ppa == 0) { +#if DEBUG + cmn_err(CE_CONT, "ppplrput: q = %x, ppa = 0??\n", q); +#endif + freemsg(mp); + return 0; + } switch (mp->b_datap->db_type) { case M_FLUSH: if (*mp->b_rptr & FLUSHW) { @@ -896,30 +1211,88 @@ ppplrput(q, mp) 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); + case M_CTL: + switch (*mp->b_rptr) { + case PPPCTL_IERROR: +#ifdef sun + if (ppa->kstats != 0) { + KSTAT_NAMED_PTR(ppa->kstats)[1].value.ul++; + } +#endif + ppa->stats.ppp_ierrors++; 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); + case PPPCTL_OERROR: +#ifdef sun + if (ppa->kstats != 0) { + KSTAT_NAMED_PTR(ppa->kstats)[3].value.ul++; + } +#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) { + np = msgpullup(mp, PPP_HDRLEN); + freemsg(mp); + if (np == 0) { +#if DEBUG + cmn_err(CE_CONT, "ppp_lrput: msgpullup failed (len=%d)\n", + len); +#endif + break; + } + mp = np; + } + ppa->stats.ppp_ipackets++; + ppa->stats.ppp_ibytes += len; +#ifdef sun + if (ppa->kstats != 0) { + KSTAT_NAMED_PTR(ppa->kstats)[0].value.ul++; + } +#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; } @@ -931,13 +1304,13 @@ ppplrsrv(q) queue_t *q; { mblk_t *mp; - struct upperstr *ppa, *us; + upperstr_t *ppa, *us; int proto; /* * Packets only get queued here for flow control reasons. */ - ppa = (struct upperstr *) q->q_ptr; + 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 @@ -959,3 +1332,69 @@ ppplrsrv(q) } 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; + + cmn_err(CE_CONT, "ppp upper streams:\n"); + for (us = minor_devs; us != 0; us = us->nextmn) { + uq = us->q; + cmn_err(CE_CONT, " %d: q=%x rlev=%d wlev=%d flags=0x%b", + us->mn, uq, (uq? qsize(uq): 0), (uq? qsize(WR(uq)): 0), + us->flags, "\020\1priv\2control\3blocked\4last"); + cmn_err(CE_CONT, " state=%x sap=%x req_sap=%x", us->state, us->sap, + us->req_sap); + if (us->ppa == 0) + cmn_err(CE_CONT, " ppa=?\n"); + else + cmn_err(CE_CONT, " ppa=%d\n", us->ppa->ppa_id); + if (us->flags & US_CONTROL) { + lq = us->lowerq; + cmn_err(CE_CONT, " control for %d lq=%x rlev=%d wlev=%d", + us->ppa_id, lq, (lq? qsize(RD(lq)): 0), + (lq? qsize(lq): 0)); + cmn_err(CE_CONT, " mru=%d mtu=%d\n", us->mru, us->mtu); + } + } +}