1: /*
2: * $Id: libnet_link_dlpi.c,v 1.1.1.1 2012/02/21 22:14:23 misho Exp $
3: *
4: * libnet
5: * libnet_dlpi.c - dlpi routines
6: *
7: * Copyright (c) 1998 - 2004 Mike D. Schiffman <mike@infonexus.com>
8: * All rights reserved.
9: *
10: * Copyright (c) 1993, 1994, 1995, 1996, 1997
11: * The Regents of the University of California. All rights reserved.
12: *
13: * Redistribution and use in source and binary forms, with or without
14: * modification, are permitted provided that: (1) source code distributions
15: * retain the above copyright notice and this paragraph in its entirety, (2)
16: * distributions including binary code include the above copyright notice and
17: * this paragraph in its entirety in the documentation or other materials
18: * provided with the distribution, and (3) all advertising materials mentioning
19: * features or use of this software display the following acknowledgement:
20: * ``This product includes software developed by the University of California,
21: * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
22: * the University nor the names of its contributors may be used to endorse
23: * or promote products derived from this software without specific prior
24: * written permission.
25: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
26: * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
27: * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
28: *
29: * This code contributed by Atanu Ghosh (atanu@cs.ucl.ac.uk),
30: * University College London.
31: */
32:
33:
34: #if (HAVE_CONFIG_H)
35: #include "../include/config.h"
36: #endif
37: #include <sys/types.h>
38: #include <sys/time.h>
39: #ifdef HAVE_SYS_BUFMOD_H
40: #include <sys/bufmod.h>
41: #endif
42: #include <sys/dlpi.h>
43: #ifdef HAVE_HPUX9
44: #include <sys/socket.h>
45: #endif
46: #ifdef DL_HP_PPA_ACK_OBS
47: #include <sys/stat.h>
48: #endif
49: #include <sys/stream.h>
50: #if defined(HAVE_SOLARIS) && defined(HAVE_SYS_BUFMOD_H)
51: #include <sys/systeminfo.h>
52: #endif
53:
54: #ifdef HAVE_SYS_DLPI_EXT_H
55: #include <sys/dlpi_ext.h>
56: #endif
57:
58: #ifdef HAVE_HPUX9
59: #include <net/if.h>
60: #endif
61:
62: #include <ctype.h>
63: #ifdef HAVE_HPUX9
64: #include <nlist.h>
65: #include <dlpi_ext.h>
66: #endif
67: #include <errno.h>
68: #include <fcntl.h>
69: #include <memory.h>
70: #include <stdio.h>
71: #include <stdlib.h>
72: #include <string.h>
73: #include <stropts.h>
74: #include <unistd.h>
75:
76: #include "../include/libnet.h"
77: #include "../include/bpf.h"
78:
79: #include "../include/gnuc.h"
80: #ifdef HAVE_OS_PROTO_H
81: #include "../include/os-proto.h"
82: #endif
83:
84: #ifndef DLPI_DEV_PREFIX
85: #define DLPI_DEV_PREFIX "/dev"
86: #endif
87:
88: #define MAXDLBUF 8192
89:
90: /* Forwards */
91: static int dlattachreq(int, bpf_u_int32, int8_t *);
92: static int dlbindack(int, int8_t *, int8_t *);
93: static int dlbindreq(int, bpf_u_int32, int8_t *);
94: static int dlinfoack(int, int8_t *, int8_t *);
95: static int dlinforeq(int, int8_t *);
96: static int dlokack(int, const int8_t *, int8_t *, int8_t *);
97: static int recv_ack(int, int, const int8_t *, int8_t *, int8_t *);
98: static int send_request(int, int8_t *, int, int8_t *, int8_t *, int);
99: #ifdef HAVE_SYS_BUFMOD_H
100: static int strioctl(int, int, int, int8_t *);
101: #endif
102: #ifdef HAVE_HPUX9
103: static int dlpi_kread(int, off_t, void *, u_int, int8_t *);
104: #endif
105: #ifdef HAVE_DEV_DLPI
106: static int get_dlpi_ppa(int, const int8_t *, int, int8_t *);
107: #endif
108:
109: /* XXX Needed by HP-UX (at least) */
110: static bpf_u_int32 ctlbuf[MAXDLBUF];
111:
112:
113: int
114: libnet_open_link(libnet_t *l)
115: {
116: register int8_t *cp;
117: int8_t *eos;
118: register int ppa;
119: register dl_info_ack_t *infop;
120: bpf_u_int32 buf[MAXDLBUF];
121: int8_t dname[100];
122: #ifndef HAVE_DEV_DLPI
123: int8_t dname2[100];
124: #endif
125:
126: if (l == NULL)
127: {
128: return (-1);
129: }
130:
131: /*
132: * Determine device and ppa
133: */
134: cp = strpbrk(l->device, "0123456789");
135: if (cp == NULL)
136: {
137: snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
138: "%s(): %s is missing unit number\n", __func__, l->device);
139: goto bad;
140: }
141: ppa = strtol(cp, &eos, 10);
142: if (*eos != '\0')
143: {
144: snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
145: "%s(): %s bad unit number\n", __func__, l->device);
146: goto bad;
147: }
148:
149: if (*(l->device) == '/')
150: {
151: memset(&dname, 0, sizeof(dname));
152: strncpy(dname, l->device, sizeof(dname) - 1);
153: dname[sizeof(dname) - 1] = '\0';
154: }
155: else
156: {
157: sprintf(dname, "%s/%s", DLPI_DEV_PREFIX, l->device);
158: }
159: #ifdef HAVE_DEV_DLPI
160: /*
161: * Map network device to /dev/dlpi unit
162: */
163: cp = "/dev/dlpi";
164:
165: l->fd = open(cp, O_RDWR);
166: if (l->fd == -1)
167: {
168: snprintf(l->err_buf, LIBNET_ERRBUF_SIZE, "%s(): open(): %s: %s\n",
169: __func__, cp, strerror(errno));
170: goto bad;
171: }
172:
173: /*
174: * Map network interface to /dev/dlpi unit
175: */
176: ppa = get_dlpi_ppa(l->fd, dname, ppa, l->err_buf);
177: if (ppa < 0)
178: {
179: goto bad;
180: }
181: #else
182: /*
183: * Try device without unit number
184: */
185: strcpy(dname2, dname);
186: cp = strchr(dname, *cp);
187: *cp = '\0';
188:
189: l->fd = open(dname, O_RDWR);
190: if (l->fd == -1)
191: {
192: if (errno != ENOENT)
193: {
194: snprintf(l->err_buf, LIBNET_ERRBUF_SIZE, "%s(): open(): %s: %s\n",
195: __func__, dname, strerror(errno));
196: goto bad;
197: }
198:
199: /*
200: * Try again with unit number
201: */
202: l->fd = open(dname2, O_RDWR);
203: if (l->fd == -1)
204: {
205: snprintf(l->err_buf, LIBNET_ERRBUF_SIZE, "%s(): open(): %s: %s\n",
206: __func__, dname2, strerror(errno));
207: goto bad;
208: }
209:
210: cp = dname2;
211: while (*cp && !isdigit((int)*cp))
212: {
213: cp++;
214: }
215: if (*cp)
216: {
217: ppa = atoi(cp);
218: }
219: else
220: /*
221: * XXX Assume unit zero
222: */
223: ppa = 0;
224: }
225: #endif
226: /*
227: * Attach if "style 2" provider
228: */
229: if (dlinforeq(l->fd, l->err_buf) < 0 ||
230: dlinfoack(l->fd, (int8_t *)buf, l->err_buf) < 0)
231: {
232: goto bad;
233: }
234: infop = &((union DL_primitives *)buf)->info_ack;
235: if (infop->dl_provider_style == DL_STYLE2 &&
236: (dlattachreq(l->fd, ppa, l->err_buf)
237: < 0 || dlokack(l->fd, "attach", (int8_t *)buf, l->err_buf) < 0))
238: {
239: goto bad;
240: }
241:
242: /*
243: * Bind HP-UX 9 and HP-UX 10.20
244: */
245: #if defined(HAVE_HPUX9) || defined(HAVE_HPUX10_20) || defined(HAVE_HPUX11) || defined(HAVE_SOLARIS)
246: if (dlbindreq(l->fd, 0, l->err_buf) < 0 ||
247: dlbindack(l->fd, (int8_t *)buf, l->err_buf) < 0)
248: {
249: goto bad;
250: }
251: #endif
252:
253: /*
254: * Determine link type
255: */
256: if (dlinforeq(l->fd, l->err_buf) < 0 ||
257: dlinfoack(l->fd, (int8_t *)buf, l->err_buf) < 0)
258: {
259: goto bad;
260: }
261:
262: infop = &((union DL_primitives *)buf)->info_ack;
263: switch (infop->dl_mac_type)
264: {
265: case DL_CSMACD:
266: case DL_ETHER:
267: l->link_type = DLT_EN10MB;
268: l->link_offset = 0xe;
269: break;
270: case DL_FDDI:
271: l->link_type = DLT_FDDI;
272: l->link_offset = 0x15;
273: break;
274: case DL_TPR:
275: l->link_type = DLT_PRONET;
276: l->link_offset = 0x16;
277: break;
278: default:
279: sprintf(l->err_buf, "%s(): unknown mac type 0x%lu\n", __func__,
280: (u_int32_t) infop->dl_mac_type);
281: goto bad;
282: }
283:
284: #ifdef DLIOCRAW
285: /*
286: * This is a non standard SunOS hack to get the ethernet header.
287: */
288: if (strioctl(l->fd, DLIOCRAW, 0, NULL) < 0)
289: {
290: sprintf(l->err_buf, "%s(): DLIOCRAW: %s\n", __func__, strerror(errno));
291: goto bad;
292: }
293: #endif
294:
295: return (1);
296: bad:
297: if (l->fd > 0)
298: {
299: close(l->fd); /* this can fail ok */
300: }
301: return (-1);
302: }
303:
304:
305: static int
306: send_request(int fd, int8_t *ptr, int len, int8_t *what, int8_t *ebuf,
307: int flags)
308: {
309: struct strbuf ctl;
310:
311: ctl.maxlen = 0;
312: ctl.len = len;
313: ctl.buf = ptr;
314:
315: if (putmsg(fd, &ctl, (struct strbuf *) NULL, flags) < 0)
316: {
317: sprintf(ebuf, "%s(): putmsg \"%s\": %s\n", __func__, what,
318: strerror(errno));
319: return (-1);
320: }
321: return (0);
322: }
323:
324: static int
325: recv_ack(int fd, int size, const int8_t *what, int8_t *bufp, int8_t *ebuf)
326: {
327: union DL_primitives *dlp;
328: struct strbuf ctl;
329: int flags;
330:
331: ctl.maxlen = MAXDLBUF;
332: ctl.len = 0;
333: ctl.buf = bufp;
334:
335: flags = 0;
336: if (getmsg(fd, &ctl, (struct strbuf*)NULL, &flags) < 0)
337: {
338: sprintf(ebuf, "%s(): %s getmsg: %s\n", __func__, what, strerror(errno));
339: return (-1);
340: }
341:
342: dlp = (union DL_primitives *)ctl.buf;
343: switch (dlp->dl_primitive)
344: {
345: case DL_INFO_ACK:
346: case DL_PHYS_ADDR_ACK:
347: case DL_BIND_ACK:
348: case DL_OK_ACK:
349: #ifdef DL_HP_PPA_ACK
350: case DL_HP_PPA_ACK:
351: #endif
352: /*
353: * These are OK
354: */
355: break;
356:
357: case DL_ERROR_ACK:
358: switch (dlp->error_ack.dl_errno)
359: {
360: case DL_BADPPA:
361: sprintf(ebuf, "recv_ack: %s bad ppa (device unit)", what);
362: break;
363: case DL_SYSERR:
364: sprintf(ebuf, "recv_ack: %s: %s",
365: what, strerror(dlp->error_ack.dl_unix_errno));
366: break;
367: case DL_UNSUPPORTED:
368: sprintf(ebuf,
369: "recv_ack: %s: Service not supplied by provider", what);
370: break;
371: default:
372: sprintf(ebuf, "recv_ack: %s error 0x%x", what,
373: (bpf_u_int32)dlp->error_ack.dl_errno);
374: break;
375: }
376: return (-1);
377:
378: default:
379: sprintf(ebuf, "recv_ack: %s unexpected primitive ack 0x%x ",
380: what, (bpf_u_int32)dlp->dl_primitive);
381: return (-1);
382: }
383:
384: if (ctl.len < size)
385: {
386: sprintf(ebuf, "recv_ack: %s ack too small (%d < %d)",
387: what, ctl.len, size);
388: return (-1);
389: }
390: return (ctl.len);
391: }
392:
393: static int
394: dlattachreq(int fd, bpf_u_int32 ppa, int8_t *ebuf)
395: {
396: dl_attach_req_t req;
397:
398: req.dl_primitive = DL_ATTACH_REQ;
399: req.dl_ppa = ppa;
400:
401: return (send_request(fd, (int8_t *)&req, sizeof(req), "attach", ebuf, 0));
402: }
403:
404: static int
405: dlbindreq(int fd, bpf_u_int32 sap, int8_t *ebuf)
406: {
407:
408: dl_bind_req_t req;
409:
410: memset((int8_t *)&req, 0, sizeof(req));
411: req.dl_primitive = DL_BIND_REQ;
412: #ifdef DL_HP_RAWDLS
413: req.dl_max_conind = 1; /* XXX magic number */
414: /*
415: * 22 is INSAP as per the HP-UX DLPI Programmer's Guide
416: */
417: req.dl_sap = 22;
418: req.dl_service_mode = DL_HP_RAWDLS;
419: #else
420: req.dl_sap = sap;
421: #ifdef DL_CLDLS
422: req.dl_service_mode = DL_CLDLS;
423: #endif
424: #endif
425: return (send_request(fd, (int8_t *)&req, sizeof(req), "bind", ebuf, 0));
426: }
427:
428: static int
429: dlbindack(int fd, int8_t *bufp, int8_t *ebuf)
430: {
431: return (recv_ack(fd, DL_BIND_ACK_SIZE, "bind", bufp, ebuf));
432: }
433:
434: static int
435: dlokack(int fd, const int8_t *what, int8_t *bufp, int8_t *ebuf)
436: {
437: return (recv_ack(fd, DL_OK_ACK_SIZE, what, bufp, ebuf));
438: }
439:
440: static int
441: dlinforeq(int fd, int8_t *ebuf)
442: {
443: dl_info_req_t req;
444:
445: req.dl_primitive = DL_INFO_REQ;
446:
447: return (send_request(fd, (int8_t *)&req, sizeof(req), "info", ebuf,
448: RS_HIPRI));
449: }
450:
451: static int
452: dlinfoack(int fd, int8_t *bufp, int8_t *ebuf)
453: {
454: return (recv_ack(fd, DL_INFO_ACK_SIZE, "info", bufp, ebuf));
455: }
456:
457:
458: #ifdef HAVE_SYS_BUFMOD_H
459: static int
460: strioctl(int fd, int cmd, int len, int8_t *dp)
461: {
462: struct strioctl str;
463: int rc;
464:
465: str.ic_cmd = cmd;
466: str.ic_timout = -1;
467: str.ic_len = len;
468: str.ic_dp = dp;
469:
470: rc = ioctl(fd, I_STR, &str);
471: if (rc < 0)
472: {
473: return (rc);
474: }
475: else
476: {
477: return (str.ic_len);
478: }
479: }
480: #endif
481:
482:
483: #if (defined(DL_HP_PPA_ACK_OBS) && !defined(HAVE_HPUX11))
484: /*
485: * Under HP-UX 10, we can ask for the ppa
486: */
487: static int
488: get_dlpi_ppa(register int fd, register const int8_t *device, register int unit,
489: register int8_t *ebuf)
490: {
491: register dl_hp_ppa_ack_t *ap;
492: register dl_hp_ppa_info_t *ip;
493: register int i;
494: register u_int32_t majdev;
495: dl_hp_ppa_req_t req;
496: struct stat statbuf;
497: bpf_u_int32 buf[MAXDLBUF];
498:
499: if (stat(device, &statbuf) < 0)
500: {
501: sprintf(ebuf, "stat: %s: %s", device, strerror(errno));
502: return (-1);
503: }
504: majdev = major(statbuf.st_rdev);
505:
506: memset((int8_t *)&req, 0, sizeof(req));
507: req.dl_primitive = DL_HP_PPA_REQ;
508:
509: memset((int8_t *)buf, 0, sizeof(buf));
510: if (send_request(fd, (int8_t *)&req, sizeof(req), "hpppa", ebuf, 0) < 0 ||
511: recv_ack(fd, DL_HP_PPA_ACK_SIZE, "hpppa", (int8_t *)buf, ebuf) < 0)
512: {
513: return (-1);
514: }
515:
516: ap = (dl_hp_ppa_ack_t *)buf;
517: ip = (dl_hp_ppa_info_t *)((u_int8_t *)ap + ap->dl_offset);
518:
519: for (i = 0; i < ap->dl_count; i++)
520: {
521: if (ip->dl_mjr_num == majdev && ip->dl_instance_num == unit)
522: break;
523:
524: ip = (dl_hp_ppa_info_t *)((u_int8_t *)ip + ip->dl_next_offset);
525: }
526:
527: if (i == ap->dl_count)
528: {
529: sprintf(ebuf, "can't find PPA for %s", device);
530: return (-1);
531: }
532:
533: if (ip->dl_hdw_state == HDW_DEAD)
534: {
535: sprintf(ebuf, "%s: hardware state: DOWN\n", device);
536: return (-1);
537: }
538: return ((int)ip->dl_ppa);
539: }
540: #endif
541:
542: #ifdef HAVE_HPUX9
543: /*
544: * Under HP-UX 9, there is no good way to determine the ppa.
545: * So punt and read it from /dev/kmem.
546: */
547: static struct nlist nl[] =
548: {
549: #define NL_IFNET 0
550: { "ifnet" },
551: { "" }
552: };
553:
554: static int8_t path_vmunix[] = "/hp-ux";
555:
556: /*
557: * Determine ppa number that specifies ifname
558: */
559: static int
560: get_dlpi_ppa(register int fd, register const int8_t *ifname, register int unit,
561: register int8_t *ebuf)
562: {
563: register const int8_t *cp;
564: register int kd;
565: void *addr;
566: struct ifnet ifnet;
567: int8_t if_name[sizeof(ifnet.if_name)], tifname[32];
568:
569: cp = strrchr(ifname, '/');
570: if (cp != NULL)
571: {
572: ifname = cp + 1;
573: }
574: if (nlist(path_vmunix, &nl) < 0)
575: {
576: sprintf(ebuf, "nlist %s failed", path_vmunix);
577: return (-1);
578: }
579:
580: if (nl[NL_IFNET].n_value == 0)
581: {
582: sprintf(ebuf, "could't find %s kernel symbol", nl[NL_IFNET].n_name);
583: return (-1);
584: }
585:
586: kd = open("/dev/kmem", O_RDONLY);
587: if (kd < 0)
588: {
589: sprintf(ebuf, "kmem open: %s", strerror(errno));
590: return (-1);
591: }
592:
593: if (dlpi_kread(kd, nl[NL_IFNET].n_value, &addr, sizeof(addr), ebuf) < 0)
594: {
595: close(kd);
596: return (-1);
597: }
598: for (; addr != NULL; addr = ifnet.if_next)
599: {
600: if (dlpi_kread(kd, (off_t)addr, &ifnet, sizeof(ifnet), ebuf) < 0 ||
601: dlpi_kread(kd, (off_t)ifnet.if_name,
602: if_name, sizeof(if_name), ebuf) < 0)
603: {
604: close(kd);
605: return (-1);
606: }
607: sprintf(tifname, "%.*s%d",
608: (int)sizeof(if_name), if_name, ifnet.if_unit);
609: if (strcmp(tifname, ifname) == 0)
610: {
611: return (ifnet.if_index);
612: }
613: }
614:
615: sprintf(ebuf, "Can't find %s", ifname);
616: return (-1);
617: }
618:
619: static int
620: dlpi_kread(register int fd, register off_t addr, register void *buf,
621: register u_int len, register int8_t *ebuf)
622: {
623: register int cc;
624:
625: if (lseek(fd, addr, SEEK_SET) < 0)
626: {
627: sprintf(ebuf, "lseek: %s", strerror(errno));
628: return (-1);
629: }
630: cc = read(fd, buf, len);
631: if (cc < 0)
632: {
633: sprintf(ebuf, "read: %s", strerror(errno));
634: return (-1);
635: }
636: else if (cc != len)
637: {
638: sprintf(ebuf, "int16_t read (%d != %d)", cc, len);
639: return (-1);
640: }
641: return (cc);
642: }
643: #endif
644:
645: #define ETHERADDRL 6
646: struct EnetHeaderInfo
647: {
648: struct libnet_ether_addr DestEtherAddr;
649: u_int16_t EtherFrameType;
650: };
651:
652:
653: int
654: libnet_close_link(libnet_t *l)
655: {
656: if (close(l->fd) == 0)
657: {
658: free(l);
659: return (1);
660: }
661: else
662: {
663: free(l);
664: return (-1);
665: }
666: }
667:
668: #ifdef HAVE_HPUX11
669: int
670: libnet_write_link(libnet_t *l, u_int8_t *packet, u_int32_t size)
671: {
672: struct strbuf data, ctl;
673: dl_hp_rawdata_req_t *rdata;
674: int c;
675:
676: if (l == NULL)
677: {
678: return (-1);
679: }
680:
681: rdata = (dl_hp_rawdata_req_t *)ctlbuf;
682: rdata->dl_primitive = DL_HP_RAWDATA_REQ;
683:
684: /* send it */
685: ctl.len = sizeof(dl_hp_rawdata_req_t);
686: ctl.maxlen = sizeof(dl_hp_rawdata_req_t);
687: ctl.buf = (int8_t *)rdata;
688:
689: data.maxlen = size;
690: data.len = size;
691: data.buf = packet;
692:
693: c = putmsg(l->fd, &ctl, &data, 0);
694: if (c == -1)
695: {
696: snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
697: "libnet_write_link(): %d bytes written (%s)\n", c,
698: strerror(errno));
699: return (-1);
700: }
701: else
702: {
703: return (size);
704: }
705: }
706: #else
707: int
708: libnet_write_link(libnet_t *l, u_int8_t *packet, u_int32_t size)
709: {
710: int c;
711: struct strbuf data;
712:
713: if (l == NULL)
714: {
715: return (-1);
716: }
717:
718: data.maxlen = size;
719: data.len = size;
720: data.buf = packet;
721:
722: c = putmsg(l->fd, NULL, &data, 0);
723: if (c == -1)
724: {
725: snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
726: "libnet_write_link: %d bytes written (%s)\n", c,
727: strerror(errno));
728: return (-1);
729: }
730: else
731: {
732: return (size);
733: }
734: }
735: #endif
736:
737: struct libnet_ether_addr *
738: libnet_get_hwaddr(libnet_t *l)
739: {
740: int8_t buf[2048];
741: union DL_primitives *dlp;
742: struct libnet_ether_addr *eap;
743:
744: if (l == NULL)
745: {
746: return (NULL);
747: }
748:
749: dlp = (union DL_primitives *)buf;
750:
751: dlp->physaddr_req.dl_primitive = DL_PHYS_ADDR_REQ;
752: dlp->physaddr_req.dl_addr_type = DL_CURR_PHYS_ADDR;
753:
754: if (send_request(l->fd, (int8_t *)dlp, DL_PHYS_ADDR_REQ_SIZE, "physaddr",
755: l->err_buf, 0) < 0)
756: {
757: return (NULL);
758: }
759: if (recv_ack(l->fd, DL_PHYS_ADDR_ACK_SIZE, "physaddr", (int8_t *)dlp,
760: l->err_buf) < 0)
761: {
762: return (NULL);
763: }
764:
765: eap = (struct libnet_ether_addr *)
766: ((int8_t *) dlp + dlp->physaddr_ack.dl_addr_offset);
767: return (eap);
768: }
769:
770: /* EOF */
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