1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 1999 Brian Somers <brian@Awfulhak.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/param.h>
30 #include <sys/un.h>
31 #if defined(__OpenBSD__) || defined(__NetBSD__)
32 #include <sys/ioctl.h>
33 #endif
34
35 #include <errno.h>
36 #include <fcntl.h>
37 #include <stdio.h>
38 #include <stdlib.h>
39 #include <string.h>
40 #include <sysexits.h>
41 #include <sys/uio.h>
42 #include <termios.h>
43 #include <ttyent.h>
44 #include <unistd.h>
45 #ifndef NONETGRAPH
46 #include <netgraph.h>
47 #include <netgraph/ng_async.h>
48 #include <netgraph/ng_message.h>
49 #include <netgraph/ng_ppp.h>
50 #include <netgraph/ng_tty.h>
51 #endif
52
53 #include "layer.h"
54 #include "defs.h"
55 #include "mbuf.h"
56 #include "log.h"
57 #include "timer.h"
58 #include "lqr.h"
59 #include "hdlc.h"
60 #include "throughput.h"
61 #include "fsm.h"
62 #include "lcp.h"
63 #include "ccp.h"
64 #include "link.h"
65 #include "async.h"
66 #include "descriptor.h"
67 #include "physical.h"
68 #include "mp.h"
69 #include "chat.h"
70 #include "auth.h"
71 #include "chap.h"
72 #include "cbcp.h"
73 #include "datalink.h"
74 #include "main.h"
75 #include "id.h"
76 #include "tty.h"
77
78 #if defined(__mac68k__) || defined(__macppc__)
79 #undef CRTS_IFLOW
80 #undef CCTS_OFLOW
81 #define CRTS_IFLOW CDTRCTS
82 #define CCTS_OFLOW CDTRCTS
83 #endif
84
85 #define Online(dev) ((dev)->mbits & TIOCM_CD)
86
87 struct ttydevice {
88 struct device dev; /* What struct physical knows about */
89 struct pppTimer Timer; /* CD checks */
90 int mbits; /* Current DCD status */
91 int carrier_seconds; /* seconds before CD is *required* */
92 #ifndef NONETGRAPH
93 struct {
94 unsigned speed; /* Pre-line-discipline speed */
95 int fd; /* Pre-line-discipline fd */
96 int disc; /* Old line-discipline */
97 } real;
98 char hook[sizeof NG_ASYNC_HOOK_SYNC]; /* our ng_socket hook */
99 int cs; /* A netgraph control socket (maybe) */
100 #endif
101 struct termios ios; /* To be able to reset from raw mode */
102 };
103
104 #define device2tty(d) ((d)->type == TTY_DEVICE ? (struct ttydevice *)d : NULL)
105
106 unsigned
tty_DeviceSize(void)107 tty_DeviceSize(void)
108 {
109 return sizeof(struct ttydevice);
110 }
111
112 /*
113 * tty_Timeout() watches the DCD signal and mentions it if it's status
114 * changes.
115 */
116 static void
tty_Timeout(void * data)117 tty_Timeout(void *data)
118 {
119 struct physical *p = data;
120 struct ttydevice *dev = device2tty(p->handler);
121 int ombits, change;
122
123 timer_Stop(&dev->Timer);
124 dev->Timer.load = SECTICKS; /* Once a second please */
125 timer_Start(&dev->Timer);
126 ombits = dev->mbits;
127
128 if (p->fd >= 0) {
129 if (ioctl(p->fd, TIOCMGET, &dev->mbits) < 0) {
130 /* we must be a pty ? */
131 if (p->cfg.cd.necessity != CD_DEFAULT)
132 log_Printf(LogWARN, "%s: Carrier ioctl not supported, "
133 "using ``set cd off''\n", p->link.name);
134 timer_Stop(&dev->Timer);
135 dev->mbits = TIOCM_CD;
136 return;
137 }
138 } else
139 dev->mbits = 0;
140
141 if (ombits == -1) {
142 /* First time looking for carrier */
143 if (Online(dev))
144 log_Printf(LogPHASE, "%s: %s: CD detected\n", p->link.name, p->name.full);
145 else if (++dev->carrier_seconds >= dev->dev.cd.delay) {
146 if (dev->dev.cd.necessity == CD_REQUIRED)
147 log_Printf(LogPHASE, "%s: %s: Required CD not detected\n",
148 p->link.name, p->name.full);
149 else {
150 log_Printf(LogPHASE, "%s: %s doesn't support CD\n",
151 p->link.name, p->name.full);
152 dev->mbits = TIOCM_CD; /* Dodgy null-modem cable ? */
153 }
154 timer_Stop(&dev->Timer);
155 /* tty_AwaitCarrier() will notice */
156 } else {
157 /* Keep waiting */
158 log_Printf(LogDEBUG, "%s: %s: Still no carrier (%d/%d)\n",
159 p->link.name, p->name.full, dev->carrier_seconds,
160 dev->dev.cd.delay);
161 dev->mbits = -1;
162 }
163 } else {
164 change = ombits ^ dev->mbits;
165 if (change & TIOCM_CD) {
166 if (dev->mbits & TIOCM_CD)
167 log_Printf(LogDEBUG, "%s: offline -> online\n", p->link.name);
168 else {
169 log_Printf(LogDEBUG, "%s: online -> offline\n", p->link.name);
170 log_Printf(LogPHASE, "%s: Carrier lost\n", p->link.name);
171 datalink_Down(p->dl, CLOSE_NORMAL);
172 timer_Stop(&dev->Timer);
173 }
174 } else
175 log_Printf(LogDEBUG, "%s: Still %sline\n", p->link.name,
176 Online(dev) ? "on" : "off");
177 }
178 }
179
180 static void
tty_StartTimer(struct physical * p)181 tty_StartTimer(struct physical *p)
182 {
183 struct ttydevice *dev = device2tty(p->handler);
184
185 timer_Stop(&dev->Timer);
186 dev->Timer.load = SECTICKS;
187 dev->Timer.func = tty_Timeout;
188 dev->Timer.name = "tty CD";
189 dev->Timer.arg = p;
190 log_Printf(LogDEBUG, "%s: Using tty_Timeout [%p]\n",
191 p->link.name, tty_Timeout);
192 timer_Start(&dev->Timer);
193 }
194
195 static int
tty_AwaitCarrier(struct physical * p)196 tty_AwaitCarrier(struct physical *p)
197 {
198 struct ttydevice *dev = device2tty(p->handler);
199
200 if (dev->dev.cd.necessity == CD_NOTREQUIRED || physical_IsSync(p))
201 return CARRIER_OK;
202
203 if (dev->mbits == -1) {
204 if (dev->Timer.state == TIMER_STOPPED) {
205 dev->carrier_seconds = 0;
206 tty_StartTimer(p);
207 }
208 return CARRIER_PENDING; /* Not yet ! */
209 }
210
211 return Online(dev) ? CARRIER_OK : CARRIER_LOST;
212 }
213
214 #ifdef NONETGRAPH
215 #define tty_SetAsyncParams NULL
216 #define tty_Write NULL
217 #define tty_Read NULL
218 #else
219
220 static int
isngtty(struct ttydevice * dev)221 isngtty(struct ttydevice *dev)
222 {
223 return dev->real.fd != -1;
224 }
225
226 static void
tty_SetAsyncParams(struct physical * p,u_int32_t mymap,u_int32_t hismap)227 tty_SetAsyncParams(struct physical *p, u_int32_t mymap, u_int32_t hismap)
228 {
229 struct ttydevice *dev = device2tty(p->handler);
230 char asyncpath[NG_PATHSIZ];
231 struct ng_async_cfg cfg;
232
233 if (isngtty(dev)) {
234 /* Configure the async converter node */
235
236 snprintf(asyncpath, sizeof asyncpath, ".:%s", dev->hook);
237 memset(&cfg, 0, sizeof cfg);
238 cfg.enabled = 1;
239 cfg.accm = mymap | hismap;
240 cfg.amru = MAX_MTU;
241 cfg.smru = MAX_MRU;
242 log_Printf(LogDEBUG, "Configure async node at %s\n", asyncpath);
243 if (NgSendMsg(dev->cs, asyncpath, NGM_ASYNC_COOKIE,
244 NGM_ASYNC_CMD_SET_CONFIG, &cfg, sizeof cfg) < 0)
245 log_Printf(LogWARN, "%s: Can't configure async node at %s\n",
246 p->link.name, asyncpath);
247 } else
248 /* No netgraph node, just config the async layer */
249 async_SetLinkParams(&p->async, mymap, hismap);
250 }
251
252 static int
LoadLineDiscipline(struct physical * p)253 LoadLineDiscipline(struct physical *p)
254 {
255 struct ttydevice *dev = device2tty(p->handler);
256 u_char rbuf[sizeof(struct ng_mesg) + sizeof(struct nodeinfo)];
257 struct ng_mesg *reply;
258 struct nodeinfo *info;
259 char ttypath[NG_NODESIZ];
260 struct ngm_mkpeer ngm;
261 struct ngm_connect ngc;
262 int ldisc, cs, ds, hot;
263 unsigned speed;
264
265 /*
266 * Don't use the netgraph line discipline for now. Using it works, but
267 * carrier cannot be detected via TIOCMGET and the device doesn't become
268 * selectable with 0 bytes to read when carrier is lost :(
269 */
270 return 0;
271
272 reply = (struct ng_mesg *)rbuf;
273 info = (struct nodeinfo *)reply->data;
274
275 loadmodules(LOAD_VERBOSLY, "netgraph", "ng_tty", "ng_async", "ng_socket",
276 NULL);
277
278 /* Get the speed before loading the line discipline */
279 speed = physical_GetSpeed(p);
280
281 if (ioctl(p->fd, TIOCGETD, &dev->real.disc) < 0) {
282 log_Printf(LogDEBUG, "%s: Couldn't get tty line discipline\n",
283 p->link.name);
284 return 0;
285 }
286 ldisc = NETGRAPHDISC;
287 if (ID0ioctl(p->fd, TIOCSETD, &ldisc) < 0) {
288 log_Printf(LogDEBUG, "%s: Couldn't set NETGRAPHDISC line discipline\n",
289 p->link.name);
290 return 0;
291 }
292
293 /* Get the name of the tty node */
294 if (ioctl(p->fd, NGIOCGINFO, info) < 0) {
295 log_Printf(LogWARN, "%s: ioctl(NGIOCGINFO): %s\n", p->link.name,
296 strerror(errno));
297 ID0ioctl(p->fd, TIOCSETD, &dev->real.disc);
298 return 0;
299 }
300 snprintf(ttypath, sizeof ttypath, "%s:", info->name);
301
302 /* Create a socket node for our endpoint (and to send messages via) */
303 if (ID0NgMkSockNode(NULL, &cs, &ds) == -1) {
304 log_Printf(LogWARN, "%s: NgMkSockNode: %s\n", p->link.name,
305 strerror(errno));
306 ID0ioctl(p->fd, TIOCSETD, &dev->real.disc);
307 return 0;
308 }
309
310 /* Set the ``hot char'' on the TTY node */
311 hot = HDLC_SYN;
312 log_Printf(LogDEBUG, "%s: Set tty hotchar to 0x%02x\n", p->link.name, hot);
313 if (NgSendMsg(cs, ttypath, NGM_TTY_COOKIE,
314 NGM_TTY_SET_HOTCHAR, &hot, sizeof hot) < 0) {
315 log_Printf(LogWARN, "%s: Can't set hot char\n", p->link.name);
316 goto failed;
317 }
318
319 /* Attach an async converter node */
320 snprintf(ngm.type, sizeof ngm.type, "%s", NG_ASYNC_NODE_TYPE);
321 snprintf(ngm.ourhook, sizeof ngm.ourhook, "%s", NG_TTY_HOOK);
322 snprintf(ngm.peerhook, sizeof ngm.peerhook, "%s", NG_ASYNC_HOOK_ASYNC);
323 log_Printf(LogDEBUG, "%s: Send mkpeer async:%s to %s:%s\n", p->link.name,
324 ngm.peerhook, ttypath, ngm.ourhook);
325 if (NgSendMsg(cs, ttypath, NGM_GENERIC_COOKIE,
326 NGM_MKPEER, &ngm, sizeof ngm) < 0) {
327 log_Printf(LogWARN, "%s: Can't create %s node\n", p->link.name,
328 NG_ASYNC_NODE_TYPE);
329 goto failed;
330 }
331
332 /* Connect the async node to our socket */
333 snprintf(ngc.path, sizeof ngc.path, "%s%s", ttypath, NG_TTY_HOOK);
334 snprintf(ngc.peerhook, sizeof ngc.peerhook, "%s", NG_ASYNC_HOOK_SYNC);
335 memcpy(ngc.ourhook, ngc.peerhook, sizeof ngc.ourhook);
336 log_Printf(LogDEBUG, "%s: Send connect %s:%s to .:%s\n", p->link.name,
337 ngc.path, ngc.peerhook, ngc.ourhook);
338 if (NgSendMsg(cs, ".:", NGM_GENERIC_COOKIE, NGM_CONNECT,
339 &ngc, sizeof ngc) < 0) {
340 log_Printf(LogWARN, "%s: Can't connect .:%s -> %s.%s: %s\n",
341 p->link.name, ngc.ourhook, ngc.path, ngc.peerhook,
342 strerror(errno));
343 goto failed;
344 }
345
346 /* Get the async node id */
347 if (NgSendMsg(cs, ngc.path, NGM_GENERIC_COOKIE, NGM_NODEINFO, NULL, 0) < 0) {
348 log_Printf(LogWARN, "%s: Can't request async node info at %s: %s\n",
349 p->link.name, ngc.path, strerror(errno));
350 goto failed;
351 }
352 if (NgRecvMsg(cs, reply, sizeof rbuf, NULL) < 0) {
353 log_Printf(LogWARN, "%s: Can't obtain async node info at %s: %s\n",
354 p->link.name, ngc.path, strerror(errno));
355 goto failed;
356 }
357
358 /* All done, set up our device state */
359 snprintf(dev->hook, sizeof dev->hook, "%s", ngc.ourhook);
360 dev->cs = cs;
361 dev->real.fd = p->fd;
362 p->fd = ds;
363 dev->real.speed = speed;
364 physical_SetSync(p);
365
366 tty_SetAsyncParams(p, 0xffffffff, 0xffffffff);
367 physical_SetupStack(p, dev->dev.name, PHYSICAL_NOFORCE);
368 log_Printf(LogPHASE, "%s: Loaded netgraph tty line discipline\n",
369 p->link.name);
370
371 return 1;
372
373 failed:
374 ID0ioctl(p->fd, TIOCSETD, &dev->real.disc);
375 close(ds);
376 close(cs);
377
378 return 0;
379 }
380
381 static void
UnloadLineDiscipline(struct physical * p)382 UnloadLineDiscipline(struct physical *p)
383 {
384 struct ttydevice *dev = device2tty(p->handler);
385
386 if (isngtty(dev)) {
387 if (!physical_SetSpeed(p, dev->real.speed))
388 log_Printf(LogWARN, "Couldn't reset tty speed to %d\n", dev->real.speed);
389 dev->real.speed = 0;
390 close(p->fd);
391 p->fd = dev->real.fd;
392 dev->real.fd = -1;
393 close(dev->cs);
394 dev->cs = -1;
395 *dev->hook = '\0';
396 if (ID0ioctl(p->fd, TIOCSETD, &dev->real.disc) == 0) {
397 physical_SetupStack(p, dev->dev.name, PHYSICAL_NOFORCE);
398 log_Printf(LogPHASE, "%s: Unloaded netgraph tty line discipline\n",
399 p->link.name);
400 } else
401 log_Printf(LogWARN, "%s: Failed to unload netgraph tty line discipline\n",
402 p->link.name);
403 }
404 }
405
406 static ssize_t
tty_Write(struct physical * p,const void * v,size_t n)407 tty_Write(struct physical *p, const void *v, size_t n)
408 {
409 struct ttydevice *dev = device2tty(p->handler);
410
411 if (isngtty(dev))
412 return NgSendData(p->fd, dev->hook, v, n) == -1 ? -1 : (ssize_t)n;
413 else
414 return write(p->fd, v, n);
415 }
416
417 static ssize_t
tty_Read(struct physical * p,void * v,size_t n)418 tty_Read(struct physical *p, void *v, size_t n)
419 {
420 struct ttydevice *dev = device2tty(p->handler);
421 char hook[sizeof NG_ASYNC_HOOK_SYNC];
422
423 if (isngtty(dev))
424 return NgRecvData(p->fd, v, n, hook);
425 else
426 return read(p->fd, v, n);
427 }
428
429 #endif /* NETGRAPH */
430
431 static int
tty_Raw(struct physical * p)432 tty_Raw(struct physical *p)
433 {
434 struct ttydevice *dev = device2tty(p->handler);
435 struct termios ios;
436 int oldflag;
437
438 log_Printf(LogDEBUG, "%s: Entering tty_Raw\n", p->link.name);
439
440 if (p->type != PHYS_DIRECT && p->fd >= 0 && !Online(dev))
441 log_Printf(LogDEBUG, "%s: Raw: descriptor = %d, mbits = %x\n",
442 p->link.name, p->fd, dev->mbits);
443
444 if (!physical_IsSync(p)) {
445 #ifndef NONETGRAPH
446 if (!LoadLineDiscipline(p))
447 #endif
448 {
449 tcgetattr(p->fd, &ios);
450 cfmakeraw(&ios);
451 if (p->cfg.rts_cts)
452 ios.c_cflag |= CLOCAL | CCTS_OFLOW | CRTS_IFLOW;
453 else
454 ios.c_cflag |= CLOCAL;
455
456 if (p->type != PHYS_DEDICATED)
457 ios.c_cflag |= HUPCL;
458
459 if (tcsetattr(p->fd, TCSANOW, &ios) == -1)
460 log_Printf(LogWARN, "%s: tcsetattr: Failed configuring device\n",
461 p->link.name);
462 }
463 }
464
465 oldflag = fcntl(p->fd, F_GETFL, 0);
466 if (oldflag < 0)
467 return 0;
468 fcntl(p->fd, F_SETFL, oldflag | O_NONBLOCK);
469
470 return 1;
471 }
472
473 static void
tty_Offline(struct physical * p)474 tty_Offline(struct physical *p)
475 {
476 struct ttydevice *dev = device2tty(p->handler);
477
478 if (p->fd >= 0) {
479 timer_Stop(&dev->Timer);
480 dev->mbits &= ~TIOCM_DTR; /* XXX: Hmm, what's this supposed to do ? */
481 if (Online(dev)) {
482 struct termios tio;
483
484 tcgetattr(p->fd, &tio);
485 if (cfsetspeed(&tio, B0) == -1 || tcsetattr(p->fd, TCSANOW, &tio) == -1)
486 log_Printf(LogWARN, "%s: Unable to set physical to speed 0\n",
487 p->link.name);
488 }
489 }
490 }
491
492 static void
tty_Cooked(struct physical * p)493 tty_Cooked(struct physical *p)
494 {
495 struct ttydevice *dev = device2tty(p->handler);
496 int oldflag;
497
498 tty_Offline(p); /* In case of emergency close()s */
499
500 tcflush(p->fd, TCIOFLUSH);
501
502 if (!physical_IsSync(p) && tcsetattr(p->fd, TCSAFLUSH, &dev->ios) == -1)
503 log_Printf(LogWARN, "%s: tcsetattr: Unable to restore device settings\n",
504 p->link.name);
505
506 #ifndef NONETGRAPH
507 UnloadLineDiscipline(p);
508 #endif
509
510 if ((oldflag = fcntl(p->fd, F_GETFL, 0)) != -1)
511 fcntl(p->fd, F_SETFL, oldflag & ~O_NONBLOCK);
512 }
513
514 static void
tty_StopTimer(struct physical * p)515 tty_StopTimer(struct physical *p)
516 {
517 struct ttydevice *dev = device2tty(p->handler);
518
519 timer_Stop(&dev->Timer);
520 }
521
522 static void
tty_Free(struct physical * p)523 tty_Free(struct physical *p)
524 {
525 struct ttydevice *dev = device2tty(p->handler);
526
527 tty_Offline(p); /* In case of emergency close()s */
528 free(dev);
529 }
530
531 static unsigned
tty_Speed(struct physical * p)532 tty_Speed(struct physical *p)
533 {
534 struct termios ios;
535
536 if (tcgetattr(p->fd, &ios) == -1)
537 return 0;
538
539 return SpeedToUnsigned(cfgetispeed(&ios));
540 }
541
542 static const char *
tty_OpenInfo(struct physical * p)543 tty_OpenInfo(struct physical *p)
544 {
545 struct ttydevice *dev = device2tty(p->handler);
546 static char buf[13];
547
548 if (Online(dev))
549 strcpy(buf, "with");
550 else
551 strcpy(buf, "no");
552 strcat(buf, " carrier");
553
554 return buf;
555 }
556
557 static int
tty_Slot(struct physical * p)558 tty_Slot(struct physical *p)
559 {
560 struct ttyent *ttyp;
561 int slot;
562
563 setttyent();
564 for (slot = 1; (ttyp = getttyent()); ++slot)
565 if (!strcmp(ttyp->ty_name, p->name.base)) {
566 endttyent();
567 return slot;
568 }
569
570 endttyent();
571 return -1;
572 }
573
574 static void
tty_device2iov(struct device * d,struct iovec * iov,int * niov,int maxiov __unused,int * auxfd,int * nauxfd)575 tty_device2iov(struct device *d, struct iovec *iov, int *niov,
576 int maxiov __unused,
577 #ifndef NONETGRAPH
578 int *auxfd, int *nauxfd
579 #else
580 int *auxfd __unused, int *nauxfd __unused
581 #endif
582 )
583 {
584 struct ttydevice *dev;
585 int sz = physical_MaxDeviceSize();
586
587 iov[*niov].iov_base = d = realloc(d, sz);
588 if (d == NULL) {
589 log_Printf(LogALERT, "Failed to allocate memory: %d\n", sz);
590 AbortProgram(EX_OSERR);
591 }
592 iov[*niov].iov_len = sz;
593 (*niov)++;
594
595 dev = device2tty(d);
596
597 #ifndef NONETGRAPH
598 if (dev->cs >= 0) {
599 *auxfd = dev->cs;
600 (*nauxfd)++;
601 }
602 #endif
603
604 if (dev->Timer.state != TIMER_STOPPED) {
605 timer_Stop(&dev->Timer);
606 dev->Timer.state = TIMER_RUNNING;
607 }
608 }
609
610 static struct device basettydevice = {
611 TTY_DEVICE,
612 "tty",
613 0,
614 { CD_VARIABLE, DEF_TTYCDDELAY },
615 tty_AwaitCarrier,
616 NULL,
617 tty_Raw,
618 tty_Offline,
619 tty_Cooked,
620 tty_SetAsyncParams,
621 tty_StopTimer,
622 tty_Free,
623 tty_Read,
624 tty_Write,
625 tty_device2iov,
626 tty_Speed,
627 tty_OpenInfo,
628 tty_Slot
629 };
630
631 struct device *
tty_iov2device(int type,struct physical * p,struct iovec * iov,int * niov,int maxiov __unused,int * auxfd,int * nauxfd)632 tty_iov2device(int type, struct physical *p, struct iovec *iov, int *niov,
633 int maxiov __unused,
634 #ifndef NONETGRAPH
635 int *auxfd, int *nauxfd
636 #else
637 int *auxfd __unused, int *nauxfd __unused
638 #endif
639 )
640 {
641 if (type == TTY_DEVICE) {
642 struct ttydevice *dev = (struct ttydevice *)iov[(*niov)++].iov_base;
643
644 dev = realloc(dev, sizeof *dev); /* Reduce to the correct size */
645 if (dev == NULL) {
646 log_Printf(LogALERT, "Failed to allocate memory: %d\n",
647 (int)(sizeof *dev));
648 AbortProgram(EX_OSERR);
649 }
650
651 #ifndef NONETGRAPH
652 if (*nauxfd) {
653 dev->cs = *auxfd;
654 (*nauxfd)--;
655 } else
656 dev->cs = -1;
657 #endif
658
659 /* Refresh function pointers etc */
660 memcpy(&dev->dev, &basettydevice, sizeof dev->dev);
661
662 physical_SetupStack(p, dev->dev.name, PHYSICAL_NOFORCE);
663 if (dev->Timer.state != TIMER_STOPPED) {
664 dev->Timer.state = TIMER_STOPPED;
665 p->handler = &dev->dev; /* For the benefit of StartTimer */
666 tty_StartTimer(p);
667 }
668 return &dev->dev;
669 }
670
671 return NULL;
672 }
673
674 struct device *
tty_Create(struct physical * p)675 tty_Create(struct physical *p)
676 {
677 struct ttydevice *dev;
678 struct termios ios;
679 int oldflag;
680
681 if (p->fd < 0 || !isatty(p->fd))
682 /* Don't want this */
683 return NULL;
684
685 if (*p->name.full == '\0') {
686 physical_SetDevice(p, ttyname(p->fd));
687 log_Printf(LogDEBUG, "%s: Input is a tty (%s)\n",
688 p->link.name, p->name.full);
689 } else
690 log_Printf(LogDEBUG, "%s: Opened %s\n", p->link.name, p->name.full);
691
692 /* We're gonna return a ttydevice (unless something goes horribly wrong) */
693
694 if ((dev = malloc(sizeof *dev)) == NULL) {
695 /* Complete failure - parent doesn't continue trying to ``create'' */
696 close(p->fd);
697 p->fd = -1;
698 return NULL;
699 }
700
701 memcpy(&dev->dev, &basettydevice, sizeof dev->dev);
702 memset(&dev->Timer, '\0', sizeof dev->Timer);
703 dev->mbits = -1;
704 #ifndef NONETGRAPH
705 dev->real.speed = 0;
706 dev->real.fd = -1;
707 dev->real.disc = -1;
708 *dev->hook = '\0';
709 #endif
710 tcgetattr(p->fd, &ios);
711 dev->ios = ios;
712
713 if (p->cfg.cd.necessity != CD_DEFAULT)
714 /* Any override is ok for the tty device */
715 dev->dev.cd = p->cfg.cd;
716
717 log_Printf(LogDEBUG, "%s: tty_Create: physical (get): fd = %d,"
718 " iflag = %lx, oflag = %lx, cflag = %lx\n", p->link.name, p->fd,
719 (u_long)ios.c_iflag, (u_long)ios.c_oflag, (u_long)ios.c_cflag);
720
721 cfmakeraw(&ios);
722 if (p->cfg.rts_cts)
723 ios.c_cflag |= CLOCAL | CCTS_OFLOW | CRTS_IFLOW;
724 else {
725 ios.c_cflag |= CLOCAL;
726 ios.c_iflag |= IXOFF;
727 }
728 ios.c_iflag |= IXON;
729 if (p->type != PHYS_DEDICATED)
730 ios.c_cflag |= HUPCL;
731
732 if (p->type != PHYS_DIRECT) {
733 /* Change tty speed when we're not in -direct mode */
734 ios.c_cflag &= ~(CSIZE | PARODD | PARENB);
735 ios.c_cflag |= p->cfg.parity;
736 if (cfsetspeed(&ios, UnsignedToSpeed(p->cfg.speed)) == -1)
737 log_Printf(LogWARN, "%s: %s: Unable to set speed to %d\n",
738 p->link.name, p->name.full, p->cfg.speed);
739 }
740
741 if (tcsetattr(p->fd, TCSADRAIN, &ios) == -1) {
742 log_Printf(LogWARN, "%s: tcsetattr: Failed configuring device\n",
743 p->link.name);
744 if (p->type != PHYS_DIRECT && p->cfg.speed > 115200)
745 log_Printf(LogWARN, "%.*s Perhaps the speed is unsupported\n",
746 (int)strlen(p->link.name), "");
747 }
748
749 log_Printf(LogDEBUG, "%s: physical (put): iflag = %lx, oflag = %lx, "
750 "cflag = %lx\n", p->link.name, (u_long)ios.c_iflag,
751 (u_long)ios.c_oflag, (u_long)ios.c_cflag);
752
753 oldflag = fcntl(p->fd, F_GETFL, 0);
754 if (oldflag < 0) {
755 /* Complete failure - parent doesn't continue trying to ``create'' */
756
757 log_Printf(LogWARN, "%s: Open: Cannot get physical flags: %s\n",
758 p->link.name, strerror(errno));
759 tty_Cooked(p);
760 close(p->fd);
761 p->fd = -1;
762 free(dev);
763 return NULL;
764 } else
765 fcntl(p->fd, F_SETFL, oldflag & ~O_NONBLOCK);
766
767 physical_SetupStack(p, dev->dev.name, PHYSICAL_NOFORCE);
768
769 return &dev->dev;
770 }
771