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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 | |
ac4d0be5 | 5 | * Tampere University of Technology |
8bc98059 PJ |
6 | * Institute of Communications Engineering |
7 | * | |
ac4d0be5 | 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) | |
8bc98059 PJ |
11 | * any later version. |
12 | * | |
ac4d0be5 | 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 | |
8bc98059 PJ |
16 | * more details. |
17 | ||
ac4d0be5 | 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., | |
8bc98059 PJ |
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 | ||
ac4d0be5 | 52 | static t_uscalar_t dlpi_ctl[1024]; /* DLPI control messages */ |
8bc98059 PJ |
53 | |
54 | /* | |
55 | * Table 9 - Architectural constants for use with ISO 8802 subnetworks | |
56 | * ISO 10589 - 8.4.8 | |
57 | */ | |
58 | ||
ac4d0be5 | 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}; | |
8bc98059 PJ |
63 | |
64 | static u_char sock_buff[8192]; | |
65 | ||
ac4d0be5 | 66 | static u_short pf_filter[] = { |
67 | ENF_PUSHWORD + 0, /* Get the SSAP/DSAP values */ | |
68 | ENF_PUSHLIT | ENF_CAND, /* Check them */ | |
69 | ISO_SAP | (ISO_SAP << 8), | |
70 | ENF_PUSHWORD + 1, /* Get the control value */ | |
71 | ENF_PUSHLIT | ENF_AND, /* Isolate it */ | |
8bc98059 | 72 | #ifdef _BIG_ENDIAN |
ac4d0be5 | 73 | 0xFF00, |
8bc98059 | 74 | #else |
ac4d0be5 | 75 | 0x00FF, |
8bc98059 | 76 | #endif |
ac4d0be5 | 77 | ENF_PUSHLIT | ENF_CAND, /* Test for expected value */ |
8bc98059 | 78 | #ifdef _BIG_ENDIAN |
ac4d0be5 | 79 | 0x0300 |
8bc98059 | 80 | #else |
ac4d0be5 | 81 | 0x0003 |
8bc98059 PJ |
82 | #endif |
83 | }; | |
84 | ||
85 | /* | |
86 | * We would like to use something like libdlpi here, but that's not present on | |
87 | * all versions of Solaris or on any non-Solaris system, so it's nowhere near | |
88 | * as portable as we'd like. Thus, we use the standards-conformant DLPI | |
89 | * interfaces plus the (optional; not needed) Solaris packet filter module. | |
90 | */ | |
91 | ||
ac4d0be5 | 92 | static int dlpisend(int fd, const void *cbuf, size_t cbuflen, const void *dbuf, |
93 | size_t dbuflen, int flags) | |
8bc98059 | 94 | { |
ac4d0be5 | 95 | const struct strbuf *ctlptr = NULL; |
96 | const struct strbuf *dataptr = NULL; | |
97 | struct strbuf ctlbuf, databuf; | |
98 | int rv; | |
99 | ||
100 | if (cbuf != NULL) { | |
101 | memset(&ctlbuf, 0, sizeof(ctlbuf)); | |
102 | ctlbuf.len = cbuflen; | |
103 | ctlbuf.buf = (void *)cbuf; | |
104 | ctlptr = &ctlbuf; | |
105 | } | |
106 | ||
107 | if (dbuf != NULL) { | |
108 | memset(&databuf, 0, sizeof(databuf)); | |
109 | databuf.len = dbuflen; | |
110 | databuf.buf = (void *)dbuf; | |
111 | dataptr = &databuf; | |
112 | } | |
113 | ||
114 | /* We assume this doesn't happen often and isn't operationally | |
115 | * significant */ | |
116 | rv = putmsg(fd, ctlptr, dataptr, flags); | |
117 | if (rv == -1 && dbuf == NULL) { | |
118 | /* | |
119 | * For actual PDU transmission - recognizable buf dbuf != NULL, | |
120 | * the error is passed upwards and should not be printed here. | |
121 | */ | |
122 | zlog_debug("%s: putmsg: %s", __func__, safe_strerror(errno)); | |
123 | } | |
124 | return rv; | |
8bc98059 PJ |
125 | } |
126 | ||
ac4d0be5 | 127 | static ssize_t dlpirctl(int fd) |
8bc98059 | 128 | { |
ac4d0be5 | 129 | struct pollfd fds[1]; |
130 | struct strbuf ctlbuf, databuf; | |
131 | int flags, retv; | |
132 | ||
133 | do { | |
134 | /* Poll is used here in case the device doesn't speak DLPI | |
135 | * correctly */ | |
136 | memset(fds, 0, sizeof(fds)); | |
137 | fds[0].fd = fd; | |
138 | fds[0].events = POLLIN | POLLPRI; | |
139 | if (poll(fds, 1, 1000) <= 0) | |
140 | return -1; | |
141 | ||
142 | memset(&ctlbuf, 0, sizeof(ctlbuf)); | |
143 | memset(&databuf, 0, sizeof(databuf)); | |
144 | ctlbuf.maxlen = sizeof(dlpi_ctl); | |
145 | ctlbuf.buf = (void *)dlpi_ctl; | |
146 | databuf.maxlen = sizeof(sock_buff); | |
147 | databuf.buf = (void *)sock_buff; | |
148 | flags = 0; | |
149 | retv = getmsg(fd, &ctlbuf, &databuf, &flags); | |
150 | ||
151 | if (retv < 0) | |
152 | return -1; | |
153 | } while (ctlbuf.len == 0); | |
154 | ||
155 | if (!(retv & MORECTL)) { | |
156 | while (retv & MOREDATA) { | |
157 | flags = 0; | |
158 | retv = getmsg(fd, NULL, &databuf, &flags); | |
159 | } | |
160 | return ctlbuf.len; | |
161 | } | |
8bc98059 | 162 | |
ac4d0be5 | 163 | while (retv & MORECTL) { |
164 | flags = 0; | |
165 | retv = getmsg(fd, &ctlbuf, &databuf, &flags); | |
8bc98059 | 166 | } |
ac4d0be5 | 167 | return -1; |
8bc98059 PJ |
168 | } |
169 | ||
ac4d0be5 | 170 | static int dlpiok(int fd, t_uscalar_t oprim) |
8bc98059 | 171 | { |
ac4d0be5 | 172 | int retv; |
173 | dl_ok_ack_t *doa = (dl_ok_ack_t *)dlpi_ctl; | |
174 | ||
175 | retv = dlpirctl(fd); | |
176 | if (retv < (ssize_t)DL_OK_ACK_SIZE || doa->dl_primitive != DL_OK_ACK | |
177 | || doa->dl_correct_primitive != oprim) { | |
178 | return -1; | |
179 | } else { | |
180 | return 0; | |
181 | } | |
8bc98059 PJ |
182 | } |
183 | ||
ac4d0be5 | 184 | static int dlpiinfo(int fd) |
8bc98059 | 185 | { |
ac4d0be5 | 186 | dl_info_req_t dir; |
187 | ssize_t retv; | |
188 | ||
189 | memset(&dir, 0, sizeof(dir)); | |
190 | dir.dl_primitive = DL_INFO_REQ; | |
191 | /* Info_req uses M_PCPROTO. */ | |
192 | dlpisend(fd, &dir, sizeof(dir), NULL, 0, RS_HIPRI); | |
193 | retv = dlpirctl(fd); | |
194 | if (retv < (ssize_t)DL_INFO_ACK_SIZE || dlpi_ctl[0] != DL_INFO_ACK) | |
195 | return -1; | |
196 | else | |
197 | return retv; | |
8bc98059 PJ |
198 | } |
199 | ||
ac4d0be5 | 200 | static int dlpiopen(const char *devpath, ssize_t *acklen) |
8bc98059 | 201 | { |
ac4d0be5 | 202 | int fd, flags; |
203 | ||
204 | fd = open(devpath, O_RDWR | O_NONBLOCK | O_NOCTTY); | |
205 | if (fd == -1) | |
206 | return -1; | |
207 | ||
208 | /* All that we want is for the open itself to be non-blocking, not I/O. | |
209 | */ | |
210 | flags = fcntl(fd, F_GETFL, 0); | |
211 | if (flags != -1) | |
212 | fcntl(fd, F_SETFL, flags & ~O_NONBLOCK); | |
213 | ||
214 | /* After opening, ask for information */ | |
215 | if ((*acklen = dlpiinfo(fd)) == -1) { | |
216 | close(fd); | |
217 | return -1; | |
218 | } | |
8bc98059 | 219 | |
ac4d0be5 | 220 | return fd; |
8bc98059 PJ |
221 | } |
222 | ||
ac4d0be5 | 223 | static int dlpiattach(int fd, int unit) |
8bc98059 | 224 | { |
ac4d0be5 | 225 | dl_attach_req_t dar; |
8bc98059 | 226 | |
ac4d0be5 | 227 | memset(&dar, 0, sizeof(dar)); |
228 | dar.dl_primitive = DL_ATTACH_REQ; | |
229 | dar.dl_ppa = unit; | |
230 | dlpisend(fd, &dar, sizeof(dar), NULL, 0, 0); | |
231 | return dlpiok(fd, dar.dl_primitive); | |
8bc98059 PJ |
232 | } |
233 | ||
ac4d0be5 | 234 | static int dlpibind(int fd) |
8bc98059 | 235 | { |
ac4d0be5 | 236 | dl_bind_req_t dbr; |
237 | int retv; | |
238 | dl_bind_ack_t *dba = (dl_bind_ack_t *)dlpi_ctl; | |
239 | ||
240 | memset(&dbr, 0, sizeof(dbr)); | |
241 | dbr.dl_primitive = DL_BIND_REQ; | |
242 | dbr.dl_service_mode = DL_CLDLS; | |
243 | dlpisend(fd, &dbr, sizeof(dbr), NULL, 0, 0); | |
244 | ||
245 | retv = dlpirctl(fd); | |
246 | if (retv < (ssize_t)DL_BIND_ACK_SIZE | |
247 | || dba->dl_primitive != DL_BIND_ACK) | |
248 | return -1; | |
249 | else | |
250 | return 0; | |
8bc98059 PJ |
251 | } |
252 | ||
ac4d0be5 | 253 | static int dlpimcast(int fd, const u_char *mcaddr) |
8bc98059 | 254 | { |
ac4d0be5 | 255 | struct { |
256 | dl_enabmulti_req_t der; | |
257 | u_char addr[ETHERADDRL]; | |
258 | } dler; | |
259 | ||
260 | memset(&dler, 0, sizeof(dler)); | |
261 | dler.der.dl_primitive = DL_ENABMULTI_REQ; | |
262 | dler.der.dl_addr_length = sizeof(dler.addr); | |
263 | dler.der.dl_addr_offset = dler.addr - (u_char *)&dler; | |
264 | memcpy(dler.addr, mcaddr, sizeof(dler.addr)); | |
265 | dlpisend(fd, &dler, sizeof(dler), NULL, 0, 0); | |
266 | return dlpiok(fd, dler.der.dl_primitive); | |
8bc98059 PJ |
267 | } |
268 | ||
ac4d0be5 | 269 | static int dlpiaddr(int fd, u_char *addr) |
8bc98059 | 270 | { |
ac4d0be5 | 271 | dl_phys_addr_req_t dpar; |
272 | dl_phys_addr_ack_t *dpaa = (dl_phys_addr_ack_t *)dlpi_ctl; | |
273 | int retv; | |
274 | ||
275 | memset(&dpar, 0, sizeof(dpar)); | |
276 | dpar.dl_primitive = DL_PHYS_ADDR_REQ; | |
277 | dpar.dl_addr_type = DL_CURR_PHYS_ADDR; | |
278 | dlpisend(fd, &dpar, sizeof(dpar), NULL, 0, 0); | |
279 | ||
280 | retv = dlpirctl(fd); | |
281 | if (retv < (ssize_t)DL_PHYS_ADDR_ACK_SIZE | |
282 | || dpaa->dl_primitive != DL_PHYS_ADDR_ACK) | |
283 | return -1; | |
284 | ||
285 | if (dpaa->dl_addr_offset < DL_PHYS_ADDR_ACK_SIZE | |
286 | || dpaa->dl_addr_length != ETHERADDRL | |
287 | || dpaa->dl_addr_offset + dpaa->dl_addr_length > (size_t)retv) | |
288 | return -1; | |
289 | ||
290 | bcopy((char *)dpaa + dpaa->dl_addr_offset, addr, ETHERADDRL); | |
291 | return 0; | |
8bc98059 PJ |
292 | } |
293 | ||
ac4d0be5 | 294 | static int open_dlpi_dev(struct isis_circuit *circuit) |
8bc98059 | 295 | { |
ac4d0be5 | 296 | int fd = -1, unit, retval; |
297 | char devpath[MAXPATHLEN]; | |
298 | dl_info_ack_t *dia = (dl_info_ack_t *)dlpi_ctl; | |
299 | ssize_t acklen; | |
300 | ||
301 | /* Only broadcast-type are supported at the moment */ | |
302 | if (circuit->circ_type != CIRCUIT_T_BROADCAST) { | |
303 | zlog_warn("%s: non-broadcast interface %s", __func__, | |
304 | circuit->interface->name); | |
305 | return ISIS_WARNING; | |
306 | } | |
307 | ||
308 | /* Try the vanity node first, if permitted */ | |
309 | if (getenv("DLPI_DEVONLY") == NULL) { | |
310 | (void)snprintf(devpath, sizeof(devpath), "/dev/net/%s", | |
311 | circuit->interface->name); | |
312 | fd = dlpiopen(devpath, &acklen); | |
313 | } | |
314 | ||
315 | /* Now try as an ordinary Style 1 node */ | |
316 | if (fd == -1) { | |
317 | (void)snprintf(devpath, sizeof(devpath), "/dev/%s", | |
318 | circuit->interface->name); | |
319 | unit = -1; | |
320 | fd = dlpiopen(devpath, &acklen); | |
321 | } | |
322 | ||
323 | /* If that fails, try again as Style 2 */ | |
324 | if (fd == -1) { | |
325 | char *cp; | |
326 | ||
327 | cp = devpath + strlen(devpath); | |
328 | while (--cp >= devpath && isdigit(*cp)) | |
329 | ; | |
330 | unit = strtol(cp, NULL, 0); | |
331 | *cp = '\0'; | |
332 | fd = dlpiopen(devpath, &acklen); | |
333 | ||
334 | /* If that too fails, then the device really doesn't exist */ | |
335 | if (fd == -1) { | |
336 | zlog_warn("%s: unknown interface %s", __func__, | |
337 | circuit->interface->name); | |
338 | return ISIS_WARNING; | |
339 | } | |
340 | ||
341 | /* Double check the DLPI style */ | |
342 | if (dia->dl_provider_style != DL_STYLE2) { | |
343 | zlog_warn( | |
344 | "open_dlpi_dev(): interface %s: %s is not style 2", | |
345 | circuit->interface->name, devpath); | |
346 | close(fd); | |
347 | return ISIS_WARNING; | |
348 | } | |
349 | ||
350 | /* If it succeeds, then we need to attach to the unit specified | |
351 | */ | |
352 | dlpiattach(fd, unit); | |
353 | ||
354 | /* Reget the information, as it may be different per node */ | |
355 | if ((acklen = dlpiinfo(fd)) == -1) { | |
356 | close(fd); | |
357 | return ISIS_WARNING; | |
358 | } | |
359 | } else { | |
360 | /* Double check the DLPI style */ | |
361 | if (dia->dl_provider_style != DL_STYLE1) { | |
362 | zlog_warn( | |
363 | "open_dlpi_dev(): interface %s: %s is not style 1", | |
364 | circuit->interface->name, devpath); | |
365 | close(fd); | |
366 | return ISIS_WARNING; | |
367 | } | |
8bc98059 PJ |
368 | } |
369 | ||
ac4d0be5 | 370 | /* Check that the interface we've got is the kind we expect */ |
371 | if ((dia->dl_sap_length != 2 && dia->dl_sap_length != -2) | |
372 | || dia->dl_service_mode != DL_CLDLS | |
373 | || dia->dl_addr_length != ETHERADDRL + 2 | |
374 | || dia->dl_brdcst_addr_length != ETHERADDRL) { | |
375 | zlog_warn("%s: unsupported interface type for %s", __func__, | |
376 | circuit->interface->name); | |
377 | close(fd); | |
378 | return ISIS_WARNING; | |
379 | } | |
380 | switch (dia->dl_mac_type) { | |
381 | case DL_CSMACD: | |
382 | case DL_ETHER: | |
383 | case DL_100VG: | |
384 | case DL_100VGTPR: | |
385 | case DL_ETH_CSMA: | |
386 | case DL_100BT: | |
387 | break; | |
388 | default: | |
389 | zlog_warn("%s: unexpected mac type on %s: %lld", __func__, | |
390 | circuit->interface->name, | |
391 | (long long)dia->dl_mac_type); | |
392 | close(fd); | |
393 | return ISIS_WARNING; | |
394 | } | |
395 | ||
396 | circuit->sap_length = dia->dl_sap_length; | |
397 | ||
398 | /* | |
399 | * The local hardware address is something that should be provided by | |
400 | * way of | |
401 | * sockaddr_dl for the interface, but isn't on Solaris. We set it here | |
402 | * based | |
403 | * on DLPI's reported address to avoid roto-tilling the world. | |
404 | * (Note that isis_circuit_if_add on Solaris doesn't set the snpa.) | |
405 | * | |
406 | * Unfortunately, GLD is broken and doesn't provide the address after | |
407 | * attach, | |
408 | * so we need to be careful and use DL_PHYS_ADDR_REQ instead. | |
409 | */ | |
410 | if (dlpiaddr(fd, circuit->u.bc.snpa) == -1) { | |
411 | zlog_warn( | |
412 | "open_dlpi_dev(): interface %s: unable to get MAC address", | |
413 | circuit->interface->name); | |
414 | close(fd); | |
415 | return ISIS_WARNING; | |
8bc98059 PJ |
416 | } |
417 | ||
ac4d0be5 | 418 | /* Now bind to SAP 0. This gives us 802-type traffic. */ |
419 | if (dlpibind(fd) == -1) { | |
420 | zlog_warn("%s: cannot bind SAP 0 on %s", __func__, | |
421 | circuit->interface->name); | |
422 | close(fd); | |
423 | return ISIS_WARNING; | |
424 | } | |
8bc98059 | 425 | |
ac4d0be5 | 426 | /* |
427 | * Join to multicast groups according to | |
428 | * 8.4.2 - Broadcast subnetwork IIH PDUs | |
429 | */ | |
430 | retval = 0; | |
431 | retval |= dlpimcast(fd, ALL_L1_ISS); | |
432 | retval |= dlpimcast(fd, ALL_ISS); | |
433 | retval |= dlpimcast(fd, ALL_L2_ISS); | |
434 | ||
435 | if (retval != 0) { | |
436 | zlog_warn("%s: unable to join multicast on %s", __func__, | |
437 | circuit->interface->name); | |
438 | close(fd); | |
439 | return ISIS_WARNING; | |
8bc98059 | 440 | } |
ac4d0be5 | 441 | |
442 | /* Push on the packet filter to avoid stray 802 packets */ | |
443 | if (ioctl(fd, I_PUSH, "pfmod") == 0) { | |
444 | struct packetfilt pfil; | |
445 | struct strioctl sioc; | |
446 | ||
447 | pfil.Pf_Priority = 0; | |
448 | pfil.Pf_FilterLen = sizeof(pf_filter) / sizeof(u_short); | |
449 | memcpy(pfil.Pf_Filter, pf_filter, sizeof(pf_filter)); | |
450 | /* pfmod does not support transparent ioctls */ | |
451 | sioc.ic_cmd = PFIOCSETF; | |
452 | sioc.ic_timout = 5; | |
453 | sioc.ic_len = sizeof(struct packetfilt); | |
454 | sioc.ic_dp = (char *)&pfil; | |
455 | if (ioctl(fd, I_STR, &sioc) == -1) | |
456 | zlog_warn("%s: could not perform PF_IOCSETF on %s", | |
457 | __func__, circuit->interface->name); | |
8bc98059 | 458 | } |
ac4d0be5 | 459 | |
460 | circuit->fd = fd; | |
461 | ||
462 | return ISIS_OK; | |
8bc98059 PJ |
463 | } |
464 | ||
465 | /* | |
466 | * Create the socket and set the tx/rx funcs | |
467 | */ | |
ac4d0be5 | 468 | int isis_sock_init(struct isis_circuit *circuit) |
8bc98059 | 469 | { |
ac4d0be5 | 470 | int retval = ISIS_OK; |
471 | ||
472 | if (isisd_privs.change(ZPRIVS_RAISE)) | |
473 | zlog_err("%s: could not raise privs, %s", __func__, | |
474 | safe_strerror(errno)); | |
475 | ||
476 | retval = open_dlpi_dev(circuit); | |
477 | ||
478 | if (retval != ISIS_OK) { | |
479 | zlog_warn("%s: could not initialize the socket", __func__); | |
480 | goto end; | |
481 | } | |
482 | ||
483 | if (circuit->circ_type == CIRCUIT_T_BROADCAST) { | |
484 | circuit->tx = isis_send_pdu_bcast; | |
485 | circuit->rx = isis_recv_pdu_bcast; | |
486 | } else { | |
487 | zlog_warn("isis_sock_init(): unknown circuit type"); | |
488 | retval = ISIS_WARNING; | |
489 | goto end; | |
490 | } | |
8bc98059 PJ |
491 | |
492 | end: | |
ac4d0be5 | 493 | if (isisd_privs.change(ZPRIVS_LOWER)) |
494 | zlog_err("%s: could not lower privs, %s", __func__, | |
495 | safe_strerror(errno)); | |
8bc98059 | 496 | |
ac4d0be5 | 497 | return retval; |
8bc98059 PJ |
498 | } |
499 | ||
ac4d0be5 | 500 | int isis_recv_pdu_bcast(struct isis_circuit *circuit, u_char *ssnpa) |
8bc98059 | 501 | { |
ac4d0be5 | 502 | struct pollfd fds[1]; |
503 | struct strbuf ctlbuf, databuf; | |
504 | int flags, retv; | |
505 | dl_unitdata_ind_t *dui = (dl_unitdata_ind_t *)dlpi_ctl; | |
506 | ||
507 | memset(fds, 0, sizeof(fds)); | |
508 | fds[0].fd = circuit->fd; | |
509 | fds[0].events = POLLIN | POLLPRI; | |
510 | if (poll(fds, 1, 0) <= 0) | |
511 | return ISIS_WARNING; | |
512 | ||
513 | memset(&ctlbuf, 0, sizeof(ctlbuf)); | |
514 | memset(&databuf, 0, sizeof(databuf)); | |
515 | ctlbuf.maxlen = sizeof(dlpi_ctl); | |
516 | ctlbuf.buf = (void *)dlpi_ctl; | |
517 | databuf.maxlen = sizeof(sock_buff); | |
518 | databuf.buf = (void *)sock_buff; | |
519 | flags = 0; | |
520 | retv = getmsg(circuit->fd, &ctlbuf, &databuf, &flags); | |
521 | ||
522 | if (retv < 0) { | |
523 | zlog_warn("isis_recv_pdu_bcast: getmsg failed: %s", | |
524 | safe_strerror(errno)); | |
525 | return ISIS_WARNING; | |
526 | } | |
527 | ||
528 | if (retv & (MORECTL | MOREDATA)) { | |
529 | while (retv & (MORECTL | MOREDATA)) { | |
530 | flags = 0; | |
531 | retv = getmsg(circuit->fd, &ctlbuf, &databuf, &flags); | |
532 | } | |
533 | return ISIS_WARNING; | |
8bc98059 | 534 | } |
8bc98059 | 535 | |
ac4d0be5 | 536 | if (ctlbuf.len < (ssize_t)DL_UNITDATA_IND_SIZE |
537 | || dui->dl_primitive != DL_UNITDATA_IND) | |
538 | return ISIS_WARNING; | |
8bc98059 | 539 | |
ac4d0be5 | 540 | if (dui->dl_src_addr_length != ETHERADDRL + 2 |
541 | || dui->dl_src_addr_offset < DL_UNITDATA_IND_SIZE | |
542 | || dui->dl_src_addr_offset + dui->dl_src_addr_length | |
543 | > (size_t)ctlbuf.len) | |
544 | return ISIS_WARNING; | |
8bc98059 | 545 | |
ac4d0be5 | 546 | memcpy(ssnpa, |
547 | (char *)dui + dui->dl_src_addr_offset | |
548 | + (circuit->sap_length > 0 ? circuit->sap_length : 0), | |
549 | ETHERADDRL); | |
8bc98059 | 550 | |
ac4d0be5 | 551 | if (databuf.len < LLC_LEN || sock_buff[0] != ISO_SAP |
552 | || sock_buff[1] != ISO_SAP || sock_buff[2] != 3) | |
553 | return ISIS_WARNING; | |
8bc98059 | 554 | |
ac4d0be5 | 555 | stream_write(circuit->rcv_stream, sock_buff + LLC_LEN, |
556 | databuf.len - LLC_LEN); | |
557 | stream_set_getp(circuit->rcv_stream, 0); | |
8bc98059 | 558 | |
ac4d0be5 | 559 | return ISIS_OK; |
8bc98059 PJ |
560 | } |
561 | ||
ac4d0be5 | 562 | int isis_send_pdu_bcast(struct isis_circuit *circuit, int level) |
8bc98059 | 563 | { |
ac4d0be5 | 564 | dl_unitdata_req_t *dur = (dl_unitdata_req_t *)dlpi_ctl; |
565 | char *dstaddr; | |
566 | u_short *dstsap; | |
567 | int buflen; | |
568 | int rv; | |
569 | ||
570 | buflen = stream_get_endp(circuit->snd_stream) + LLC_LEN; | |
571 | if ((size_t)buflen > sizeof(sock_buff)) { | |
572 | zlog_warn( | |
573 | "isis_send_pdu_bcast: sock_buff size %zu is less than " | |
574 | "output pdu size %d on circuit %s", | |
575 | sizeof(sock_buff), buflen, circuit->interface->name); | |
576 | return ISIS_WARNING; | |
577 | } | |
578 | ||
579 | stream_set_getp(circuit->snd_stream, 0); | |
580 | ||
581 | memset(dur, 0, sizeof(*dur)); | |
582 | dur->dl_primitive = DL_UNITDATA_REQ; | |
583 | dur->dl_dest_addr_length = ETHERADDRL + 2; | |
584 | dur->dl_dest_addr_offset = sizeof(*dur); | |
585 | ||
586 | dstaddr = (char *)(dur + 1); | |
587 | if (circuit->sap_length < 0) { | |
588 | dstsap = (u_short *)(dstaddr + ETHERADDRL); | |
589 | } else { | |
590 | dstsap = (u_short *)dstaddr; | |
591 | dstaddr += circuit->sap_length; | |
592 | } | |
593 | if (level == 1) | |
594 | memcpy(dstaddr, ALL_L1_ISS, ETHERADDRL); | |
595 | else | |
596 | memcpy(dstaddr, ALL_L2_ISS, ETHERADDRL); | |
597 | /* Note: DLPI SAP values are in host byte order */ | |
598 | *dstsap = buflen; | |
599 | ||
600 | sock_buff[0] = ISO_SAP; | |
601 | sock_buff[1] = ISO_SAP; | |
602 | sock_buff[2] = 0x03; | |
603 | memcpy(sock_buff + LLC_LEN, circuit->snd_stream->data, | |
604 | stream_get_endp(circuit->snd_stream)); | |
605 | rv = dlpisend(circuit->fd, dur, sizeof(*dur) + dur->dl_dest_addr_length, | |
606 | sock_buff, buflen, 0); | |
607 | if (rv < 0) { | |
608 | zlog_warn("IS-IS dlpi: could not transmit packet on %s: %s", | |
609 | circuit->interface->name, safe_strerror(errno)); | |
610 | if (ERRNO_IO_RETRY(errno)) | |
611 | return ISIS_WARNING; | |
612 | return ISIS_ERROR; | |
613 | } | |
614 | ||
615 | return ISIS_OK; | |
8bc98059 | 616 | } |
745bf05f DL |
617 | |
618 | #endif /* ISIS_METHOD == ISIS_METHOD_DLPI */ |