![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to if_atmsubr.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [Apple XNU] / XNU / bsd / net|
Return to if_atmsubr.c CVS log | Up to [Apple XNU] / XNU / bsd / net |
1.1 root 1: /*
2: * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * The contents of this file constitute Original Code as defined in and
7: * are subject to the Apple Public Source License Version 1.1 (the
8: * "License"). You may not use this file except in compliance with the
9: * License. Please obtain a copy of the License at
10: * http://www.apple.com/publicsource and read it before using this file.
11: *
12: * This Original Code and all software distributed under the License are
13: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
16: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17: * License for the specific language governing rights and limitations
18: * under the License.
19: *
20: * @APPLE_LICENSE_HEADER_END@
21: */
22: /* $NetBSD: if_atmsubr.c,v 1.10 1997/03/11 23:19:51 chuck Exp $ */
23:
24: /*
25: *
26: * Copyright (c) 1996 Charles D. Cranor and Washington University.
27: * All rights reserved.
28: *
29: * Redistribution and use in source and binary forms, with or without
30: * modification, are permitted provided that the following conditions
31: * are met:
32: * 1. Redistributions of source code must retain the above copyright
33: * notice, this list of conditions and the following disclaimer.
34: * 2. Redistributions in binary form must reproduce the above copyright
35: * notice, this list of conditions and the following disclaimer in the
36: * documentation and/or other materials provided with the distribution.
37: * 3. All advertising materials mentioning features or use of this software
38: * must display the following acknowledgement:
39: * This product includes software developed by Charles D. Cranor and
40: * Washington University.
41: * 4. The name of the author may not be used to endorse or promote products
42: * derived from this software without specific prior written permission.
43: *
44: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
45: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
46: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
47: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
48: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
49: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
50: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
51: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
52: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
53: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
54: */
55:
56: /*
57: * if_atmsubr.c
58: */
59:
60: #include "opt_inet.h"
61: #include "opt_natm.h"
62:
63: #include <sys/param.h>
64: #include <sys/systm.h>
65: #include <sys/mbuf.h>
66: #include <sys/socket.h>
67: #include <sys/sockio.h>
68: #include <sys/malloc.h>
69: #include <sys/errno.h>
70:
71:
72: #include <net/if.h>
73: #include <net/netisr.h>
74: #include <net/route.h>
75: #include <net/if_dl.h>
76: #include <net/if_types.h>
77: #include <net/if_atm.h>
78:
79: #include <netinet/in.h>
80: #include <netinet/if_atm.h>
81: #include <netinet/if_ether.h> /* XXX: for ETHERTYPE_* */
82: #if defined(INET) || defined(INET6)
83: #include <netinet/in_var.h>
84: #endif
85: #if NATM
86: #include <netnatm/natm.h>
87: #endif
88:
89: #ifndef ETHERTYPE_IPV6
90: #define ETHERTYPE_IPV6 0x86dd
91: #endif
92:
93: #define senderr(e) { error = (e); goto bad;}
94:
95: /*
96: * atm_output: ATM output routine
97: * inputs:
98: * "ifp" = ATM interface to output to
99: * "m0" = the packet to output
100: * "dst" = the sockaddr to send to (either IP addr, or raw VPI/VCI)
101: * "rt0" = the route to use
102: * returns: error code [0 == ok]
103: *
104: * note: special semantic: if (dst == NULL) then we assume "m" already
105: * has an atm_pseudohdr on it and just send it directly.
106: * [for native mode ATM output] if dst is null, then
107: * rt0 must also be NULL.
108: */
109:
110: int
111: atm_output(ifp, m0, dst, rt0)
112: register struct ifnet *ifp;
113: struct mbuf *m0;
114: struct sockaddr *dst;
115: struct rtentry *rt0;
116: {
117: u_int16_t etype = 0; /* if using LLC/SNAP */
118: int s, error = 0, sz;
119: struct atm_pseudohdr atmdst, *ad;
120: register struct mbuf *m = m0;
121: register struct rtentry *rt;
122: struct atmllc *atmllc;
123: struct atmllc *llc_hdr = NULL;
124: u_int32_t atm_flags;
125:
126: if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
127: senderr(ENETDOWN);
128:
129: /*
130: * check route
131: */
132: if ((rt = rt0) != NULL) {
133:
134: if ((rt->rt_flags & RTF_UP) == 0) { /* route went down! */
135: if ((rt0 = rt = RTALLOC1(dst, 0)) != NULL)
136: rt->rt_refcnt--;
137: else
138: senderr(EHOSTUNREACH);
139: }
140:
141: if (rt->rt_flags & RTF_GATEWAY) {
142: if (rt->rt_gwroute == 0)
143: goto lookup;
144: if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) {
145: rtfree(rt); rt = rt0;
146: lookup: rt->rt_gwroute = RTALLOC1(rt->rt_gateway, 0);
147: if ((rt = rt->rt_gwroute) == 0)
148: senderr(EHOSTUNREACH);
149: }
150: }
151:
152: /* XXX: put RTF_REJECT code here if doing ATMARP */
153:
154: }
155:
156: /*
157: * check for non-native ATM traffic (dst != NULL)
158: */
159: if (dst) {
160: switch (dst->sa_family) {
161: #if defined(INET) || defined(INET6)
162: case AF_INET:
163: case AF_INET6:
164: if (!atmresolve(rt, m, dst, &atmdst)) {
165: m = NULL;
166: /* XXX: atmresolve already free'd it */
167: senderr(EHOSTUNREACH);
168: /* XXX: put ATMARP stuff here */
169: /* XXX: watch who frees m on failure */
170: }
171: if (dst->sa_family == AF_INET6)
172: etype = htons(ETHERTYPE_IPV6);
173: else
174: etype = htons(ETHERTYPE_IP);
175: break;
176: #endif /* INET || INET6 */
177:
178: case AF_UNSPEC:
179: /*
180: * XXX: bpfwrite or output from a pvc shadow if.
181: * assuming dst contains 12 bytes (atm pseudo
182: * header (4) + LLC/SNAP (8))
183: */
184: bcopy(dst->sa_data, &atmdst, sizeof(atmdst));
185: llc_hdr = (struct atmllc *)(dst->sa_data + sizeof(atmdst));
186: break;
187:
188: default:
189: #if defined(__NetBSD__) || defined(__OpenBSD__)
190: printf("%s: can't handle af%d\n", ifp->if_xname,
191: dst->sa_family);
192: #elif defined(__FreeBSD__) || defined(__bsdi__)
193: printf("%s%d: can't handle af%d\n", ifp->if_name,
194: ifp->if_unit, dst->sa_family);
195: #endif
196: senderr(EAFNOSUPPORT);
197: }
198:
199: /*
200: * must add atm_pseudohdr to data
201: */
202: sz = sizeof(atmdst);
203: atm_flags = ATM_PH_FLAGS(&atmdst);
204: if (atm_flags & ATM_PH_LLCSNAP) sz += 8; /* sizeof snap == 8 */
205: M_PREPEND(m, sz, M_DONTWAIT);
206: if (m == 0)
207: senderr(ENOBUFS);
208: ad = mtod(m, struct atm_pseudohdr *);
209: *ad = atmdst;
210: if (atm_flags & ATM_PH_LLCSNAP) {
211: atmllc = (struct atmllc *)(ad + 1);
212: if (llc_hdr == NULL) {
213: bcopy(ATMLLC_HDR, atmllc->llchdr,
214: sizeof(atmllc->llchdr));
215: ATM_LLC_SETTYPE(atmllc, etype);
216: /* note: already in network order */
217: }
218: else
219: bcopy(llc_hdr, atmllc, sizeof(struct atmllc));
220: }
221: }
222:
223: /*
224: * Queue message on interface, and start output if interface
225: * not yet active.
226: */
227: s = splimp();
228: if (IF_QFULL(&ifp->if_snd)) {
229: IF_DROP(&ifp->if_snd);
230: splx(s);
231: senderr(ENOBUFS);
232: }
233: ifp->if_obytes += m->m_pkthdr.len;
234: IF_ENQUEUE(&ifp->if_snd, m);
235: if ((ifp->if_flags & IFF_OACTIVE) == 0)
236: (*ifp->if_start)(ifp);
237: splx(s);
238: return (error);
239:
240: bad:
241: if (m)
242: m_freem(m);
243: return (error);
244: }
245:
246: /*
247: * Process a received ATM packet;
248: * the packet is in the mbuf chain m.
249: */
250: void
251: atm_input(ifp, ah, m, rxhand)
252: struct ifnet *ifp;
253: register struct atm_pseudohdr *ah;
254: struct mbuf *m;
255: void *rxhand;
256: {
257: register struct ifqueue *inq;
258: u_int16_t etype = ETHERTYPE_IP; /* default */
259: int s;
260:
261: if ((ifp->if_flags & IFF_UP) == 0) {
262: m_freem(m);
263: return;
264: }
265: ifp->if_ibytes += m->m_pkthdr.len;
266:
267: #if ATM_PVCEXT
268: if (ATM_PH_FLAGS(ah) & ATM_PH_PVCSIF) {
269: /*
270: * when PVC shadow interface is used, pointer to
271: * the shadow interface is passed as rxhand.
272: * override the receive interface of the packet.
273: */
274: m->m_pkthdr.rcvif = (struct ifnet *)rxhand;
275: rxhand = NULL;
276: }
277: #endif /* ATM_PVCEXT */
278:
279: if (rxhand) {
280: #if NATM
281: struct natmpcb *npcb = rxhand;
282: s = splimp(); /* in case 2 atm cards @ diff lvls */
283: npcb->npcb_inq++; /* count # in queue */
284: splx(s);
285: schednetisr(NETISR_NATM);
286: inq = &natmintrq;
287: m->m_pkthdr.rcvif = rxhand; /* XXX: overload */
288: #else
289: printf("atm_input: NATM detected but not configured in kernel\n");
290: m_freem(m);
291: return;
292: #endif
293: } else {
294: /*
295: * handle LLC/SNAP header, if present
296: */
297: if (ATM_PH_FLAGS(ah) & ATM_PH_LLCSNAP) {
298: struct atmllc *alc;
299: if (m->m_len < sizeof(*alc) &&
300: (m = m_pullup(m, sizeof(*alc))) == 0)
301: return; /* failed */
302: alc = mtod(m, struct atmllc *);
303: if (bcmp(alc, ATMLLC_HDR, 6)) {
304: #if defined(__NetBSD__) || defined(__OpenBSD__)
305: printf("%s: recv'd invalid LLC/SNAP frame [vp=%d,vc=%d]\n",
306: ifp->if_xname, ATM_PH_VPI(ah), ATM_PH_VCI(ah));
307: #elif defined(__FreeBSD__) || defined(__bsdi__)
308: printf("%s%d: recv'd invalid LLC/SNAP frame [vp=%d,vc=%d]\n",
309: ifp->if_name, ifp->if_unit, ATM_PH_VPI(ah), ATM_PH_VCI(ah));
310: #endif
311: m_freem(m);
312: return;
313: }
314: etype = ATM_LLC_TYPE(alc);
315: m_adj(m, sizeof(*alc));
316: }
317:
318: switch (etype) {
319: #if INET
320: case ETHERTYPE_IP:
321: schednetisr(NETISR_IP);
322: inq = &ipintrq;
323: break;
324: #endif
325: #if INET6
326: case ETHERTYPE_IPV6:
327: schednetisr(NETISR_IPV6);
328: inq = &ip6intrq;
329: break;
330: #endif
331: default:
332: m_freem(m);
333: return;
334: }
335: }
336:
337: s = splimp();
338: if (IF_QFULL(inq)) {
339: IF_DROP(inq);
340: m_freem(m);
341: } else
342: IF_ENQUEUE(inq, m);
343: splx(s);
344: }
345:
346: /*
347: * Perform common duties while attaching to interface list
348: */
349: void
350: atm_ifattach(ifp)
351: register struct ifnet *ifp;
352: {
353: register struct ifaddr *ifa;
354: register struct sockaddr_dl *sdl;
355:
356: ifp->if_type = IFT_ATM;
357: ifp->if_addrlen = 0;
358: ifp->if_hdrlen = 0;
359: ifp->if_mtu = ATMMTU;
360: ifp->if_output = atm_output;
361:
362: #if defined(__NetBSD__) || defined(__OpenBSD__)
363: for (ifa = ifp->if_addrlist.tqh_first; ifa != 0;
364: ifa = ifa->ifa_list.tqe_next)
365: #elif defined(__FreeBSD__) && (__FreeBSD__ > 2)
366: for (ifa = ifp->if_addrhead.tqh_first; ifa;
367: ifa = ifa->ifa_link.tqe_next)
368: #elif defined(__FreeBSD__) || defined(__bsdi__)
369: for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next)
370: #endif
371: if ((sdl = (struct sockaddr_dl *)ifa->ifa_addr) &&
372: sdl->sdl_family == AF_LINK) {
373: sdl->sdl_type = IFT_ATM;
374: sdl->sdl_alen = ifp->if_addrlen;
375: #ifdef notyet /* if using ATMARP, store hardware address using the next line */
376: bcopy(ifp->hw_addr, LLADDR(sdl), ifp->if_addrlen);
377: #endif
378: break;
379: }
380:
381: }
382:
383: #if ATM_PVCEXT
384: /*
385: * ATM PVC shadow interface: a trick to assign a shadow interface
386: * to a PVC.
387: * with shadow interface, each PVC looks like an individual
388: * Point-to-Point interface.
389: * as oposed to the NBMA model, a shadow interface is inherently
390: * multicast capable (no LANE/MARS required).
391: */
392: struct pvcsif {
393: struct ifnet sif_shadow; /* shadow ifnet structure per pvc */
394: struct atm_pseudohdr sif_aph; /* flags + vpi:vci */
395: struct ifnet *sif_ifp; /* pointer to the genuine interface */
396: };
397:
398: static int pvc_output __P((struct ifnet *, struct mbuf *,
399: struct sockaddr *, struct rtentry *));
400: static int pvc_ioctl __P((struct ifnet *, u_long, caddr_t));
401:
402: /*
403: * create and attach per pvc shadow interface
404: * (currently detach is not supported)
405: */
406: static int pvc_number = 0;
407:
408: struct ifnet *
409: pvc_attach(ifp)
410: struct ifnet *ifp;
411: {
412: struct pvcsif *pvcsif;
413: struct ifnet *shadow;
414: struct ifaddr *ifa;
415: struct sockaddr_dl *sdl;
416: int s;
417:
418: MALLOC(pvcsif, struct pvcsif *, sizeof(struct pvcsif),
419: M_DEVBUF, M_WAITOK);
420: bzero(pvcsif, sizeof(struct pvcsif));
421:
422: pvcsif->sif_ifp = ifp;
423: shadow = &pvcsif->sif_shadow;
424:
425: shadow->if_name = "pvc";
426: shadow->if_family = APPLE_IF_FAM_PVC;
427: shadow->if_unit = pvc_number++;
428: shadow->if_flags = ifp->if_flags | (IFF_POINTOPOINT | IFF_MULTICAST);
429: shadow->if_ioctl = pvc_ioctl;
430: shadow->if_output = pvc_output;
431: shadow->if_start = NULL;
432: shadow->if_mtu = ifp->if_mtu;
433: shadow->if_type = ifp->if_type;
434: shadow->if_addrlen = ifp->if_addrlen;
435: shadow->if_hdrlen = ifp->if_hdrlen;
436: shadow->if_softc = pvcsif;
437: shadow->if_snd.ifq_maxlen = 50; /* dummy */
438:
439: s = splimp();
440: if_attach(shadow);
441:
442: #if defined(__NetBSD__) || defined(__OpenBSD__)
443: for (ifa = shadow->if_addrlist.tqh_first; ifa != 0;
444: ifa = ifa->ifa_list.tqe_next)
445: #elif defined(__FreeBSD__) && (__FreeBSD__ > 2)
446: for (ifa = shadow->if_addrhead.tqh_first; ifa;
447: ifa = ifa->ifa_link.tqe_next)
448: #elif defined(__FreeBSD__) || defined(__bsdi__)
449: for (ifa = shadow->if_addrlist; ifa; ifa = ifa->ifa_next)
450: #endif
451: if ((sdl = (struct sockaddr_dl *)ifa->ifa_addr) &&
452: sdl->sdl_family == AF_LINK) {
453: sdl->sdl_type = IFT_ATM;
454: sdl->sdl_alen = shadow->if_addrlen;
455: break;
456: }
457: splx(s);
458:
459: return (shadow);
460: }
461:
462: /*
463: * pvc_output relays the packet to atm_output along with vpi:vci info.
464: */
465: static int
466: pvc_output(shadow, m, dst, rt)
467: struct ifnet *shadow;
468: struct mbuf *m;
469: struct sockaddr *dst;
470: struct rtentry *rt;
471: {
472: struct pvcsif *pvcsif;
473: struct sockaddr dst_addr;
474: struct atmllc *atmllc;
475: u_int16_t etype = 0;
476: int error = 0;
477:
478: if ((shadow->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
479: senderr(ENETDOWN);
480:
481: pvcsif = shadow->if_softc;
482: if (ATM_PH_VCI(&pvcsif->sif_aph) == 0)
483: senderr(ENETDOWN);
484:
485: /*
486: * create a dummy sockaddr: (using bpfwrite interface)
487: * put atm pseudo header and llc/snap into sa_data (12 bytes)
488: * and mark it as AF_UNSPEC.
489: */
490: if (dst) {
491: switch (dst->sa_family) {
492: #if defined(INET) || defined(INET6)
493: case AF_INET:
494: case AF_INET6:
495: if (dst->sa_family == AF_INET6)
496: etype = htons(ETHERTYPE_IPV6);
497: else
498: etype = htons(ETHERTYPE_IP);
499: break;
500: #endif
501:
502: default:
503: printf("%s%d: can't handle af%d\n", shadow->if_name,
504: shadow->if_unit, dst->sa_family);
505: senderr(EAFNOSUPPORT);
506: }
507: }
508:
509: dst_addr.sa_family = AF_UNSPEC;
510: bcopy(&pvcsif->sif_aph, dst_addr.sa_data,
511: sizeof(struct atm_pseudohdr));
512: atmllc = (struct atmllc *)
513: (dst_addr.sa_data + sizeof(struct atm_pseudohdr));
514: bcopy(ATMLLC_HDR, atmllc->llchdr, sizeof(atmllc->llchdr));
515: ATM_LLC_SETTYPE(atmllc, etype); /* note: already in network order */
516:
517: return atm_output(pvcsif->sif_ifp, m, &dst_addr, rt);
518:
519: bad:
520: if (m)
521: m_freem(m);
522: return (error);
523: }
524:
525: static int
526: pvc_ioctl(shadow, cmd, data)
527: struct ifnet *shadow;
528: u_long cmd;
529: caddr_t data;
530: {
531: struct ifnet *ifp;
532: struct pvcsif *pvcsif;
533: struct ifreq *ifr = (struct ifreq *) data;
534: void (*ifa_rtrequest)(int, struct rtentry *, struct sockaddr *) = NULL;
535: int error = 0;
536:
537: pvcsif = (struct pvcsif *)shadow->if_softc;
538: ifp = pvcsif->sif_ifp;
539: if (ifp == 0 || ifp->if_ioctl == 0)
540: return (EOPNOTSUPP);
541:
542: /*
543: * pre process
544: */
545: switch (cmd) {
546: case SIOCGPVCSIF:
547: snprintf(ifr->ifr_name, sizeof(ifr->ifr_name),
548: "%s%d", ifp->if_name, ifp->if_unit);
549: return (0);
550:
551: case SIOCGPVCTX:
552: do {
553: struct pvctxreq *pvcreq = (struct pvctxreq *)data;
554:
555: snprintf(pvcreq->pvc_ifname,
556: sizeof(pvcreq->pvc_ifname), "%s%d",
557: ifp->if_name, ifp->if_unit);
558: pvcreq->pvc_aph = pvcsif->sif_aph;
559: } while (0);
560: break;
561:
562: case SIOCADDMULTI:
563: case SIOCDELMULTI:
564: if (ifr == 0)
565: return (EAFNOSUPPORT); /* XXX */
566: switch (ifr->ifr_addr.sa_family) {
567: #if INET
568: case AF_INET:
569: return (0);
570: #endif
571: #if INET6
572: case AF_INET6:
573: return (0);
574: #endif
575: default:
576: return (EAFNOSUPPORT);
577: }
578: break;
579: case SIOCSIFADDR:
580: if (ifp->if_flags & IFF_UP) {
581: /* real if is already up */
582: shadow->if_flags = ifp->if_flags |
583: (IFF_POINTOPOINT|IFF_MULTICAST);
584: return (0);
585: }
586: /*
587: * XXX: save the rtrequest field since the atm driver
588: * overwrites this field.
589: */
590: ifa_rtrequest = ((struct ifaddr *)data)->ifa_rtrequest;
591: break;
592:
593: case SIOCSIFFLAGS:
594: if ((shadow->if_flags & IFF_UP) == 0) {
595: /*
596: * interface down. don't pass this to
597: * the real interface.
598: */
599: return (0);
600: }
601: if (shadow->if_flags & IFF_UP) {
602: /*
603: * interface up. if the real if is already up,
604: * nothing to do.
605: */
606: if (ifp->if_flags & IFF_UP) {
607: shadow->if_flags = ifp->if_flags |
608: (IFF_POINTOPOINT|IFF_MULTICAST);
609: return (0);
610: }
611: }
612: break;
613: }
614:
615: /*
616: * pass the ioctl to the genuine interface
617: */
618: error = (*ifp->if_ioctl)(ifp, cmd, data);
619:
620: /*
621: * post process
622: */
623: switch (cmd) {
624: case SIOCSIFMTU:
625: shadow->if_mtu = ifp->if_mtu;
626: break;
627: case SIOCSIFADDR:
628: /* restore rtrequest */
629: ((struct ifaddr *)data)->ifa_rtrequest = ifa_rtrequest;
630: /* fall into... */
631: case SIOCSIFFLAGS:
632: /* update if_flags */
633: shadow->if_flags = ifp->if_flags
634: | (IFF_POINTOPOINT|IFF_MULTICAST);
635: break;
636: }
637:
638: return (error);
639: }
640:
641: int pvc_setaph(shadow, aph)
642: struct ifnet *shadow;
643: struct atm_pseudohdr *aph;
644: {
645: struct pvcsif *pvcsif;
646:
647: pvcsif = shadow->if_softc;
648: bcopy(aph, &pvcsif->sif_aph, sizeof(struct atm_pseudohdr));
649: return (0);
650: }
651:
652: #endif /* ATM_PVCEXT */
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.