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8bc98059 PJ |
1 | /* |
2 | * IS-IS Rout(e)ing protocol - isis_dlpi.c | |
3 | * | |
4 | * Copyright (C) 2001,2002 Sampo Saaristo | |
5 | * Tampere University of Technology | |
6 | * Institute of Communications Engineering | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public Licenseas published by the Free | |
10 | * Software Foundation; either version 2 of the License, or (at your option) | |
11 | * any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful,but WITHOUT | |
14 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
16 | * more details. | |
17 | ||
18 | * You should have received a copy of the GNU General Public License along | |
19 | * with this program; if not, write to the Free Software Foundation, Inc., | |
20 | * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
21 | */ | |
22 | ||
23 | #include <zebra.h> | |
745bf05f | 24 | #if ISIS_METHOD == ISIS_METHOD_DLPI |
8bc98059 PJ |
25 | #include <net/if.h> |
26 | #include <netinet/if_ether.h> | |
27 | #include <sys/types.h> | |
28 | #include <unistd.h> | |
29 | #include <fcntl.h> | |
30 | #include <stropts.h> | |
31 | #include <poll.h> | |
32 | #include <sys/dlpi.h> | |
33 | #include <sys/pfmod.h> | |
34 | ||
35 | #include "log.h" | |
cfd1f27b | 36 | #include "network.h" |
8bc98059 PJ |
37 | #include "stream.h" |
38 | #include "if.h" | |
39 | ||
40 | #include "isisd/dict.h" | |
8bc98059 PJ |
41 | #include "isisd/isis_constants.h" |
42 | #include "isisd/isis_common.h" | |
43 | #include "isisd/isis_circuit.h" | |
44 | #include "isisd/isis_flags.h" | |
45 | #include "isisd/isisd.h" | |
8bc98059 PJ |
46 | #include "isisd/isis_network.h" |
47 | ||
48 | #include "privs.h" | |
49 | ||
50 | extern struct zebra_privs_t isisd_privs; | |
51 | ||
52 | static t_uscalar_t dlpi_ctl[1024]; /* DLPI control messages */ | |
53 | ||
54 | /* | |
55 | * Table 9 - Architectural constants for use with ISO 8802 subnetworks | |
56 | * ISO 10589 - 8.4.8 | |
57 | */ | |
58 | ||
59 | u_char ALL_L1_ISS[6] = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x14 }; | |
60 | u_char ALL_L2_ISS[6] = { 0x01, 0x80, 0xC2, 0x00, 0x00, 0x15 }; | |
61 | u_char ALL_ISS[6] = { 0x09, 0x00, 0x2B, 0x00, 0x00, 0x05 }; | |
62 | u_char ALL_ESS[6] = { 0x09, 0x00, 0x2B, 0x00, 0x00, 0x04 }; | |
63 | ||
64 | static u_char sock_buff[8192]; | |
65 | ||
66 | static u_short pf_filter[] = | |
67 | { | |
68 | ENF_PUSHWORD + 0, /* Get the SSAP/DSAP values */ | |
69 | ENF_PUSHLIT | ENF_CAND, /* Check them */ | |
70 | ISO_SAP | (ISO_SAP << 8), | |
71 | ENF_PUSHWORD + 1, /* Get the control value */ | |
72 | ENF_PUSHLIT | ENF_AND, /* Isolate it */ | |
73 | #ifdef _BIG_ENDIAN | |
74 | 0xFF00, | |
75 | #else | |
76 | 0x00FF, | |
77 | #endif | |
78 | ENF_PUSHLIT | ENF_CAND, /* Test for expected value */ | |
79 | #ifdef _BIG_ENDIAN | |
80 | 0x0300 | |
81 | #else | |
82 | 0x0003 | |
83 | #endif | |
84 | }; | |
85 | ||
86 | /* | |
87 | * We would like to use something like libdlpi here, but that's not present on | |
88 | * all versions of Solaris or on any non-Solaris system, so it's nowhere near | |
89 | * as portable as we'd like. Thus, we use the standards-conformant DLPI | |
90 | * interfaces plus the (optional; not needed) Solaris packet filter module. | |
91 | */ | |
92 | ||
cfd1f27b | 93 | static int |
8bc98059 PJ |
94 | dlpisend (int fd, const void *cbuf, size_t cbuflen, |
95 | const void *dbuf, size_t dbuflen, int flags) | |
96 | { | |
97 | const struct strbuf *ctlptr = NULL; | |
98 | const struct strbuf *dataptr = NULL; | |
99 | struct strbuf ctlbuf, databuf; | |
cfd1f27b | 100 | int rv; |
8bc98059 PJ |
101 | |
102 | if (cbuf != NULL) | |
103 | { | |
104 | memset (&ctlbuf, 0, sizeof (ctlbuf)); | |
105 | ctlbuf.len = cbuflen; | |
106 | ctlbuf.buf = (void *)cbuf; | |
107 | ctlptr = &ctlbuf; | |
108 | } | |
109 | ||
110 | if (dbuf != NULL) | |
111 | { | |
112 | memset (&databuf, 0, sizeof (databuf)); | |
113 | databuf.len = dbuflen; | |
114 | databuf.buf = (void *)dbuf; | |
115 | dataptr = &databuf; | |
116 | } | |
117 | ||
118 | /* We assume this doesn't happen often and isn't operationally significant */ | |
cfd1f27b CF |
119 | rv = putmsg(fd, ctlptr, dataptr, flags); |
120 | if (rv == -1 && dbuf == NULL) | |
121 | { | |
122 | /* | |
123 | * For actual PDU transmission - recognizable buf dbuf != NULL, | |
124 | * the error is passed upwards and should not be printed here. | |
125 | */ | |
126 | zlog_debug ("%s: putmsg: %s", __func__, safe_strerror (errno)); | |
127 | } | |
128 | return rv; | |
8bc98059 PJ |
129 | } |
130 | ||
131 | static ssize_t | |
132 | dlpirctl (int fd) | |
133 | { | |
134 | struct pollfd fds[1]; | |
135 | struct strbuf ctlbuf, databuf; | |
136 | int flags, retv; | |
137 | ||
138 | do | |
139 | { | |
140 | /* Poll is used here in case the device doesn't speak DLPI correctly */ | |
141 | memset (fds, 0, sizeof (fds)); | |
142 | fds[0].fd = fd; | |
143 | fds[0].events = POLLIN | POLLPRI; | |
144 | if (poll (fds, 1, 1000) <= 0) | |
145 | return -1; | |
146 | ||
147 | memset (&ctlbuf, 0, sizeof (ctlbuf)); | |
148 | memset (&databuf, 0, sizeof (databuf)); | |
149 | ctlbuf.maxlen = sizeof (dlpi_ctl); | |
150 | ctlbuf.buf = (void *)dlpi_ctl; | |
151 | databuf.maxlen = sizeof (sock_buff); | |
152 | databuf.buf = (void *)sock_buff; | |
153 | flags = 0; | |
154 | retv = getmsg (fd, &ctlbuf, &databuf, &flags); | |
155 | ||
156 | if (retv < 0) | |
157 | return -1; | |
158 | } | |
159 | while (ctlbuf.len == 0); | |
160 | ||
161 | if (!(retv & MORECTL)) | |
162 | { | |
163 | while (retv & MOREDATA) | |
164 | { | |
165 | flags = 0; | |
166 | retv = getmsg (fd, NULL, &databuf, &flags); | |
167 | } | |
168 | return ctlbuf.len; | |
169 | } | |
170 | ||
171 | while (retv & MORECTL) | |
172 | { | |
173 | flags = 0; | |
174 | retv = getmsg (fd, &ctlbuf, &databuf, &flags); | |
175 | } | |
176 | return -1; | |
177 | } | |
178 | ||
179 | static int | |
180 | dlpiok (int fd, t_uscalar_t oprim) | |
181 | { | |
182 | int retv; | |
183 | dl_ok_ack_t *doa = (dl_ok_ack_t *)dlpi_ctl; | |
184 | ||
185 | retv = dlpirctl (fd); | |
3e3a83b2 | 186 | if (retv < (ssize_t)DL_OK_ACK_SIZE || doa->dl_primitive != DL_OK_ACK || |
8bc98059 PJ |
187 | doa->dl_correct_primitive != oprim) |
188 | { | |
189 | return -1; | |
190 | } | |
191 | else | |
192 | { | |
193 | return 0; | |
194 | } | |
195 | } | |
196 | ||
197 | static int | |
198 | dlpiinfo (int fd) | |
199 | { | |
200 | dl_info_req_t dir; | |
201 | ssize_t retv; | |
202 | ||
203 | memset (&dir, 0, sizeof (dir)); | |
204 | dir.dl_primitive = DL_INFO_REQ; | |
205 | /* Info_req uses M_PCPROTO. */ | |
206 | dlpisend (fd, &dir, sizeof (dir), NULL, 0, RS_HIPRI); | |
207 | retv = dlpirctl (fd); | |
3e3a83b2 | 208 | if (retv < (ssize_t)DL_INFO_ACK_SIZE || dlpi_ctl[0] != DL_INFO_ACK) |
8bc98059 PJ |
209 | return -1; |
210 | else | |
211 | return retv; | |
212 | } | |
213 | ||
214 | static int | |
215 | dlpiopen (const char *devpath, ssize_t *acklen) | |
216 | { | |
217 | int fd, flags; | |
218 | ||
219 | fd = open (devpath, O_RDWR | O_NONBLOCK | O_NOCTTY); | |
220 | if (fd == -1) | |
221 | return -1; | |
222 | ||
223 | /* All that we want is for the open itself to be non-blocking, not I/O. */ | |
224 | flags = fcntl (fd, F_GETFL, 0); | |
225 | if (flags != -1) | |
226 | fcntl (fd, F_SETFL, flags & ~O_NONBLOCK); | |
227 | ||
228 | /* After opening, ask for information */ | |
229 | if ((*acklen = dlpiinfo (fd)) == -1) | |
230 | { | |
231 | close (fd); | |
232 | return -1; | |
233 | } | |
234 | ||
235 | return fd; | |
236 | } | |
237 | ||
238 | static int | |
239 | dlpiattach (int fd, int unit) | |
240 | { | |
241 | dl_attach_req_t dar; | |
242 | ||
243 | memset (&dar, 0, sizeof (dar)); | |
244 | dar.dl_primitive = DL_ATTACH_REQ; | |
245 | dar.dl_ppa = unit; | |
246 | dlpisend (fd, &dar, sizeof (dar), NULL, 0, 0); | |
247 | return dlpiok (fd, dar.dl_primitive); | |
248 | } | |
249 | ||
250 | static int | |
251 | dlpibind (int fd) | |
252 | { | |
253 | dl_bind_req_t dbr; | |
254 | int retv; | |
255 | dl_bind_ack_t *dba = (dl_bind_ack_t *)dlpi_ctl; | |
256 | ||
257 | memset (&dbr, 0, sizeof (dbr)); | |
258 | dbr.dl_primitive = DL_BIND_REQ; | |
259 | dbr.dl_service_mode = DL_CLDLS; | |
260 | dlpisend (fd, &dbr, sizeof (dbr), NULL, 0, 0); | |
261 | ||
262 | retv = dlpirctl (fd); | |
3e3a83b2 | 263 | if (retv < (ssize_t)DL_BIND_ACK_SIZE || dba->dl_primitive != DL_BIND_ACK) |
8bc98059 PJ |
264 | return -1; |
265 | else | |
266 | return 0; | |
267 | } | |
268 | ||
269 | static int | |
270 | dlpimcast (int fd, const u_char *mcaddr) | |
271 | { | |
272 | struct { | |
273 | dl_enabmulti_req_t der; | |
274 | u_char addr[ETHERADDRL]; | |
275 | } dler; | |
276 | ||
277 | memset (&dler, 0, sizeof (dler)); | |
278 | dler.der.dl_primitive = DL_ENABMULTI_REQ; | |
279 | dler.der.dl_addr_length = sizeof (dler.addr); | |
280 | dler.der.dl_addr_offset = dler.addr - (u_char *)&dler; | |
281 | memcpy (dler.addr, mcaddr, sizeof (dler.addr)); | |
282 | dlpisend (fd, &dler, sizeof (dler), NULL, 0, 0); | |
283 | return dlpiok (fd, dler.der.dl_primitive); | |
284 | } | |
285 | ||
286 | static int | |
287 | dlpiaddr (int fd, u_char *addr) | |
288 | { | |
289 | dl_phys_addr_req_t dpar; | |
290 | dl_phys_addr_ack_t *dpaa = (dl_phys_addr_ack_t *)dlpi_ctl; | |
291 | int retv; | |
292 | ||
293 | memset (&dpar, 0, sizeof (dpar)); | |
294 | dpar.dl_primitive = DL_PHYS_ADDR_REQ; | |
295 | dpar.dl_addr_type = DL_CURR_PHYS_ADDR; | |
296 | dlpisend (fd, &dpar, sizeof (dpar), NULL, 0, 0); | |
297 | ||
298 | retv = dlpirctl (fd); | |
3e3a83b2 DL |
299 | if (retv < (ssize_t)DL_PHYS_ADDR_ACK_SIZE |
300 | || dpaa->dl_primitive != DL_PHYS_ADDR_ACK) | |
8bc98059 PJ |
301 | return -1; |
302 | ||
303 | if (dpaa->dl_addr_offset < DL_PHYS_ADDR_ACK_SIZE || | |
304 | dpaa->dl_addr_length != ETHERADDRL || | |
3e3a83b2 | 305 | dpaa->dl_addr_offset + dpaa->dl_addr_length > (size_t)retv) |
8bc98059 PJ |
306 | return -1; |
307 | ||
308 | bcopy((char *)dpaa + dpaa->dl_addr_offset, addr, ETHERADDRL); | |
309 | return 0; | |
310 | } | |
311 | ||
312 | static int | |
313 | open_dlpi_dev (struct isis_circuit *circuit) | |
314 | { | |
ca248d8b | 315 | int fd = -1, unit, retval; |
8bc98059 PJ |
316 | char devpath[MAXPATHLEN]; |
317 | dl_info_ack_t *dia = (dl_info_ack_t *)dlpi_ctl; | |
318 | ssize_t acklen; | |
319 | ||
320 | /* Only broadcast-type are supported at the moment */ | |
321 | if (circuit->circ_type != CIRCUIT_T_BROADCAST) | |
322 | { | |
323 | zlog_warn ("%s: non-broadcast interface %s", __func__, | |
324 | circuit->interface->name); | |
325 | return ISIS_WARNING; | |
326 | } | |
69954565 JD |
327 | |
328 | /* Try the vanity node first, if permitted */ | |
329 | if (getenv("DLPI_DEVONLY") == NULL) | |
330 | { | |
331 | (void) snprintf (devpath, sizeof(devpath), "/dev/net/%s", | |
332 | circuit->interface->name); | |
333 | fd = dlpiopen (devpath, &acklen); | |
334 | } | |
335 | ||
336 | /* Now try as an ordinary Style 1 node */ | |
337 | if (fd == -1) | |
338 | { | |
339 | (void) snprintf (devpath, sizeof (devpath), "/dev/%s", | |
340 | circuit->interface->name); | |
341 | unit = -1; | |
342 | fd = dlpiopen (devpath, &acklen); | |
343 | } | |
8bc98059 PJ |
344 | |
345 | /* If that fails, try again as Style 2 */ | |
346 | if (fd == -1) | |
347 | { | |
348 | char *cp; | |
349 | ||
350 | cp = devpath + strlen (devpath); | |
351 | while (--cp >= devpath && isdigit(*cp)) | |
352 | ; | |
353 | unit = strtol(cp, NULL, 0); | |
354 | *cp = '\0'; | |
355 | fd = dlpiopen (devpath, &acklen); | |
356 | ||
357 | /* If that too fails, then the device really doesn't exist */ | |
358 | if (fd == -1) | |
359 | { | |
360 | zlog_warn ("%s: unknown interface %s", __func__, | |
361 | circuit->interface->name); | |
362 | return ISIS_WARNING; | |
363 | } | |
364 | ||
365 | /* Double check the DLPI style */ | |
366 | if (dia->dl_provider_style != DL_STYLE2) | |
367 | { | |
368 | zlog_warn ("open_dlpi_dev(): interface %s: %s is not style 2", | |
369 | circuit->interface->name, devpath); | |
370 | close (fd); | |
371 | return ISIS_WARNING; | |
372 | } | |
373 | ||
374 | /* If it succeeds, then we need to attach to the unit specified */ | |
375 | dlpiattach (fd, unit); | |
376 | ||
377 | /* Reget the information, as it may be different per node */ | |
378 | if ((acklen = dlpiinfo (fd)) == -1) | |
379 | { | |
380 | close (fd); | |
381 | return ISIS_WARNING; | |
382 | } | |
383 | } | |
384 | else | |
385 | { | |
386 | /* Double check the DLPI style */ | |
387 | if (dia->dl_provider_style != DL_STYLE1) | |
388 | { | |
389 | zlog_warn ("open_dlpi_dev(): interface %s: %s is not style 1", | |
390 | circuit->interface->name, devpath); | |
391 | close (fd); | |
392 | return ISIS_WARNING; | |
393 | } | |
394 | } | |
395 | ||
396 | /* Check that the interface we've got is the kind we expect */ | |
397 | if ((dia->dl_sap_length != 2 && dia->dl_sap_length != -2) || | |
398 | dia->dl_service_mode != DL_CLDLS || dia->dl_addr_length != ETHERADDRL + 2 || | |
399 | dia->dl_brdcst_addr_length != ETHERADDRL) | |
400 | { | |
401 | zlog_warn ("%s: unsupported interface type for %s", __func__, | |
402 | circuit->interface->name); | |
403 | close (fd); | |
404 | return ISIS_WARNING; | |
405 | } | |
406 | switch (dia->dl_mac_type) | |
407 | { | |
408 | case DL_CSMACD: | |
409 | case DL_ETHER: | |
410 | case DL_100VG: | |
411 | case DL_100VGTPR: | |
412 | case DL_ETH_CSMA: | |
413 | case DL_100BT: | |
414 | break; | |
415 | default: | |
3e3a83b2 DL |
416 | zlog_warn ("%s: unexpected mac type on %s: %lld", __func__, |
417 | circuit->interface->name, (long long)dia->dl_mac_type); | |
8bc98059 PJ |
418 | close (fd); |
419 | return ISIS_WARNING; | |
420 | } | |
421 | ||
422 | circuit->sap_length = dia->dl_sap_length; | |
423 | ||
424 | /* | |
425 | * The local hardware address is something that should be provided by way of | |
426 | * sockaddr_dl for the interface, but isn't on Solaris. We set it here based | |
427 | * on DLPI's reported address to avoid roto-tilling the world. | |
428 | * (Note that isis_circuit_if_add on Solaris doesn't set the snpa.) | |
429 | * | |
430 | * Unfortunately, GLD is broken and doesn't provide the address after attach, | |
431 | * so we need to be careful and use DL_PHYS_ADDR_REQ instead. | |
432 | */ | |
433 | if (dlpiaddr (fd, circuit->u.bc.snpa) == -1) | |
434 | { | |
435 | zlog_warn ("open_dlpi_dev(): interface %s: unable to get MAC address", | |
436 | circuit->interface->name); | |
437 | close (fd); | |
438 | return ISIS_WARNING; | |
439 | } | |
440 | ||
441 | /* Now bind to SAP 0. This gives us 802-type traffic. */ | |
442 | if (dlpibind (fd) == -1) | |
443 | { | |
444 | zlog_warn ("%s: cannot bind SAP 0 on %s", __func__, | |
445 | circuit->interface->name); | |
446 | close (fd); | |
447 | return ISIS_WARNING; | |
448 | } | |
449 | ||
450 | /* | |
451 | * Join to multicast groups according to | |
452 | * 8.4.2 - Broadcast subnetwork IIH PDUs | |
453 | */ | |
454 | retval = 0; | |
318c8040 DL |
455 | retval |= dlpimcast (fd, ALL_L1_ISS); |
456 | retval |= dlpimcast (fd, ALL_ISS); | |
457 | retval |= dlpimcast (fd, ALL_L2_ISS); | |
8bc98059 PJ |
458 | |
459 | if (retval != 0) | |
460 | { | |
461 | zlog_warn ("%s: unable to join multicast on %s", __func__, | |
462 | circuit->interface->name); | |
463 | close (fd); | |
464 | return ISIS_WARNING; | |
465 | } | |
466 | ||
467 | /* Push on the packet filter to avoid stray 802 packets */ | |
468 | if (ioctl (fd, I_PUSH, "pfmod") == 0) | |
469 | { | |
470 | struct packetfilt pfil; | |
3e40282f | 471 | struct strioctl sioc; |
8bc98059 PJ |
472 | |
473 | pfil.Pf_Priority = 0; | |
474 | pfil.Pf_FilterLen = sizeof (pf_filter) / sizeof (u_short); | |
475 | memcpy (pfil.Pf_Filter, pf_filter, sizeof (pf_filter)); | |
3e40282f JD |
476 | /* pfmod does not support transparent ioctls */ |
477 | sioc.ic_cmd = PFIOCSETF; | |
478 | sioc.ic_timout = 5; | |
479 | sioc.ic_len = sizeof (struct packetfilt); | |
480 | sioc.ic_dp = (char *)&pfil; | |
481 | if (ioctl (fd, I_STR, &sioc) == -1) | |
482 | zlog_warn("%s: could not perform PF_IOCSETF on %s", | |
483 | __func__, circuit->interface->name); | |
8bc98059 PJ |
484 | } |
485 | ||
486 | circuit->fd = fd; | |
487 | ||
488 | return ISIS_OK; | |
489 | } | |
490 | ||
491 | /* | |
492 | * Create the socket and set the tx/rx funcs | |
493 | */ | |
494 | int | |
495 | isis_sock_init (struct isis_circuit *circuit) | |
496 | { | |
497 | int retval = ISIS_OK; | |
498 | ||
499 | if (isisd_privs.change (ZPRIVS_RAISE)) | |
500 | zlog_err ("%s: could not raise privs, %s", __func__, safe_strerror (errno)); | |
501 | ||
502 | retval = open_dlpi_dev (circuit); | |
503 | ||
504 | if (retval != ISIS_OK) | |
505 | { | |
506 | zlog_warn ("%s: could not initialize the socket", __func__); | |
507 | goto end; | |
508 | } | |
509 | ||
510 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) | |
511 | { | |
512 | circuit->tx = isis_send_pdu_bcast; | |
513 | circuit->rx = isis_recv_pdu_bcast; | |
514 | } | |
515 | else | |
516 | { | |
517 | zlog_warn ("isis_sock_init(): unknown circuit type"); | |
518 | retval = ISIS_WARNING; | |
519 | goto end; | |
520 | } | |
521 | ||
522 | end: | |
523 | if (isisd_privs.change (ZPRIVS_LOWER)) | |
524 | zlog_err ("%s: could not lower privs, %s", __func__, safe_strerror (errno)); | |
525 | ||
526 | return retval; | |
527 | } | |
528 | ||
529 | int | |
530 | isis_recv_pdu_bcast (struct isis_circuit *circuit, u_char * ssnpa) | |
531 | { | |
532 | struct pollfd fds[1]; | |
533 | struct strbuf ctlbuf, databuf; | |
534 | int flags, retv; | |
535 | dl_unitdata_ind_t *dui = (dl_unitdata_ind_t *)dlpi_ctl; | |
536 | ||
537 | memset (fds, 0, sizeof (fds)); | |
538 | fds[0].fd = circuit->fd; | |
539 | fds[0].events = POLLIN | POLLPRI; | |
540 | if (poll (fds, 1, 0) <= 0) | |
541 | return ISIS_WARNING; | |
542 | ||
543 | memset (&ctlbuf, 0, sizeof (ctlbuf)); | |
544 | memset (&databuf, 0, sizeof (databuf)); | |
545 | ctlbuf.maxlen = sizeof (dlpi_ctl); | |
546 | ctlbuf.buf = (void *)dlpi_ctl; | |
547 | databuf.maxlen = sizeof (sock_buff); | |
548 | databuf.buf = (void *)sock_buff; | |
549 | flags = 0; | |
550 | retv = getmsg (circuit->fd, &ctlbuf, &databuf, &flags); | |
551 | ||
552 | if (retv < 0) | |
553 | { | |
554 | zlog_warn ("isis_recv_pdu_bcast: getmsg failed: %s", | |
555 | safe_strerror (errno)); | |
556 | return ISIS_WARNING; | |
557 | } | |
558 | ||
559 | if (retv & (MORECTL | MOREDATA)) | |
560 | { | |
561 | while (retv & (MORECTL | MOREDATA)) | |
562 | { | |
563 | flags = 0; | |
564 | retv = getmsg (circuit->fd, &ctlbuf, &databuf, &flags); | |
565 | } | |
566 | return ISIS_WARNING; | |
567 | } | |
568 | ||
3e3a83b2 | 569 | if (ctlbuf.len < (ssize_t)DL_UNITDATA_IND_SIZE || |
8bc98059 PJ |
570 | dui->dl_primitive != DL_UNITDATA_IND) |
571 | return ISIS_WARNING; | |
572 | ||
573 | if (dui->dl_src_addr_length != ETHERADDRL + 2 || | |
574 | dui->dl_src_addr_offset < DL_UNITDATA_IND_SIZE || | |
3e3a83b2 | 575 | dui->dl_src_addr_offset + dui->dl_src_addr_length > (size_t)ctlbuf.len) |
8bc98059 PJ |
576 | return ISIS_WARNING; |
577 | ||
578 | memcpy (ssnpa, (char *)dui + dui->dl_src_addr_offset + | |
579 | (circuit->sap_length > 0 ? circuit->sap_length : 0), ETHERADDRL); | |
580 | ||
581 | if (databuf.len < LLC_LEN || sock_buff[0] != ISO_SAP || | |
582 | sock_buff[1] != ISO_SAP || sock_buff[2] != 3) | |
583 | return ISIS_WARNING; | |
584 | ||
585 | stream_write (circuit->rcv_stream, sock_buff + LLC_LEN, | |
586 | databuf.len - LLC_LEN); | |
587 | stream_set_getp (circuit->rcv_stream, 0); | |
588 | ||
589 | return ISIS_OK; | |
590 | } | |
591 | ||
592 | int | |
593 | isis_send_pdu_bcast (struct isis_circuit *circuit, int level) | |
594 | { | |
595 | dl_unitdata_req_t *dur = (dl_unitdata_req_t *)dlpi_ctl; | |
596 | char *dstaddr; | |
597 | u_short *dstsap; | |
3f045a08 | 598 | int buflen; |
cfd1f27b | 599 | int rv; |
3f045a08 JB |
600 | |
601 | buflen = stream_get_endp (circuit->snd_stream) + LLC_LEN; | |
3e3a83b2 | 602 | if ((size_t)buflen > sizeof (sock_buff)) |
3f045a08 | 603 | { |
3e3a83b2 | 604 | zlog_warn ("isis_send_pdu_bcast: sock_buff size %zu is less than " |
3f045a08 JB |
605 | "output pdu size %d on circuit %s", |
606 | sizeof (sock_buff), buflen, circuit->interface->name); | |
607 | return ISIS_WARNING; | |
608 | } | |
8bc98059 PJ |
609 | |
610 | stream_set_getp (circuit->snd_stream, 0); | |
611 | ||
612 | memset (dur, 0, sizeof (*dur)); | |
613 | dur->dl_primitive = DL_UNITDATA_REQ; | |
614 | dur->dl_dest_addr_length = ETHERADDRL + 2; | |
615 | dur->dl_dest_addr_offset = sizeof (*dur); | |
616 | ||
617 | dstaddr = (char *)(dur + 1); | |
618 | if (circuit->sap_length < 0) | |
619 | { | |
620 | dstsap = (u_short *)(dstaddr + ETHERADDRL); | |
621 | } | |
622 | else | |
623 | { | |
624 | dstsap = (u_short *)dstaddr; | |
625 | dstaddr += circuit->sap_length; | |
626 | } | |
627 | if (level == 1) | |
628 | memcpy (dstaddr, ALL_L1_ISS, ETHERADDRL); | |
629 | else | |
630 | memcpy (dstaddr, ALL_L2_ISS, ETHERADDRL); | |
631 | /* Note: DLPI SAP values are in host byte order */ | |
3f045a08 | 632 | *dstsap = buflen; |
8bc98059 PJ |
633 | |
634 | sock_buff[0] = ISO_SAP; | |
635 | sock_buff[1] = ISO_SAP; | |
636 | sock_buff[2] = 0x03; | |
637 | memcpy (sock_buff + LLC_LEN, circuit->snd_stream->data, | |
638 | stream_get_endp (circuit->snd_stream)); | |
cfd1f27b CF |
639 | rv = dlpisend(circuit->fd, dur, sizeof (*dur) + dur->dl_dest_addr_length, |
640 | sock_buff, buflen, 0); | |
641 | if (rv < 0) | |
642 | { | |
643 | zlog_warn("IS-IS dlpi: could not transmit packet on %s: %s", | |
644 | circuit->interface->name, safe_strerror(errno)); | |
645 | if (ERRNO_IO_RETRY(errno)) | |
646 | return ISIS_WARNING; | |
647 | return ISIS_ERROR; | |
648 | } | |
649 | ||
8bc98059 PJ |
650 | return ISIS_OK; |
651 | } | |
745bf05f DL |
652 | |
653 | #endif /* ISIS_METHOD == ISIS_METHOD_DLPI */ |