xref: /illumos-kvm-cmd/qemu-char.c (revision 68396ea9)
1 /*
2  * QEMU System Emulator
3  *
4  * Copyright (c) 2003-2008 Fabrice Bellard
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a copy
7  * of this software and associated documentation files (the "Software"), to deal
8  * in the Software without restriction, including without limitation the rights
9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10  * copies of the Software, and to permit persons to whom the Software is
11  * furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be included in
14  * all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22  * THE SOFTWARE.
23  */
24 #include "qemu-common.h"
25 #include "net.h"
26 #include "monitor.h"
27 #include "console.h"
28 #include "sysemu.h"
29 #include "qemu-timer.h"
30 #include "qemu-char.h"
31 #include "hw/usb.h"
32 #include "hw/baum.h"
33 #include "hw/msmouse.h"
34 #include "qemu-objects.h"
35 
36 #include <unistd.h>
37 #include <fcntl.h>
38 #include <signal.h>
39 #include <time.h>
40 #include <errno.h>
41 #include <sys/time.h>
42 #include <zlib.h>
43 
44 #ifndef _WIN32
45 #include <sys/times.h>
46 #include <sys/wait.h>
47 #include <termios.h>
48 #include <sys/mman.h>
49 #include <sys/ioctl.h>
50 #include <sys/resource.h>
51 #include <sys/socket.h>
52 #include <netinet/in.h>
53 #include <net/if.h>
54 #include <arpa/inet.h>
55 #include <dirent.h>
56 #include <netdb.h>
57 #include <sys/select.h>
58 #ifdef CONFIG_BSD
59 #include <sys/stat.h>
60 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
61 #include <libutil.h>
62 #include <dev/ppbus/ppi.h>
63 #include <dev/ppbus/ppbconf.h>
64 #if defined(__GLIBC__)
65 #include <pty.h>
66 #endif
67 #elif defined(__DragonFly__)
68 #include <libutil.h>
69 #include <dev/misc/ppi/ppi.h>
70 #include <bus/ppbus/ppbconf.h>
71 #else
72 #include <util.h>
73 #endif
74 #else
75 #ifdef __linux__
76 #include <pty.h>
77 
78 #include <linux/ppdev.h>
79 #include <linux/parport.h>
80 #endif
81 #ifdef __sun__
82 #include <sys/stat.h>
83 #include <sys/ethernet.h>
84 #include <sys/sockio.h>
85 #include <netinet/arp.h>
86 #include <netinet/in.h>
87 #include <netinet/in_systm.h>
88 #include <netinet/ip.h>
89 #include <netinet/ip_icmp.h> // must come after ip.h
90 #include <netinet/udp.h>
91 #include <netinet/tcp.h>
92 #include <net/if.h>
93 #include <syslog.h>
94 #include <stropts.h>
95 #endif
96 #endif
97 #endif
98 
99 #include "qemu_socket.h"
100 #include "ui/qemu-spice.h"
101 
102 #define READ_BUF_LEN 4096
103 
104 /***********************************************************/
105 /* character device */
106 
107 static QTAILQ_HEAD(CharDriverStateHead, CharDriverState) chardevs =
108     QTAILQ_HEAD_INITIALIZER(chardevs);
109 
qemu_chr_event(CharDriverState * s,int event)110 static void qemu_chr_event(CharDriverState *s, int event)
111 {
112     /* Keep track if the char device is open */
113     switch (event) {
114         case CHR_EVENT_OPENED:
115             s->opened = 1;
116             break;
117         case CHR_EVENT_CLOSED:
118             s->opened = 0;
119             break;
120     }
121 
122     if (!s->chr_event)
123         return;
124     s->chr_event(s->handler_opaque, event);
125 }
126 
qemu_chr_generic_open_bh(void * opaque)127 static void qemu_chr_generic_open_bh(void *opaque)
128 {
129     CharDriverState *s = opaque;
130     qemu_chr_event(s, CHR_EVENT_OPENED);
131     qemu_bh_delete(s->bh);
132     s->bh = NULL;
133 }
134 
qemu_chr_generic_open(CharDriverState * s)135 void qemu_chr_generic_open(CharDriverState *s)
136 {
137     if (s->bh == NULL) {
138 	s->bh = qemu_bh_new(qemu_chr_generic_open_bh, s);
139 	qemu_bh_schedule(s->bh);
140     }
141 }
142 
qemu_chr_write(CharDriverState * s,const uint8_t * buf,int len)143 int qemu_chr_write(CharDriverState *s, const uint8_t *buf, int len)
144 {
145     return s->chr_write(s, buf, len);
146 }
147 
qemu_chr_ioctl(CharDriverState * s,int cmd,void * arg)148 int qemu_chr_ioctl(CharDriverState *s, int cmd, void *arg)
149 {
150     if (!s->chr_ioctl)
151         return -ENOTSUP;
152     return s->chr_ioctl(s, cmd, arg);
153 }
154 
qemu_chr_can_read(CharDriverState * s)155 int qemu_chr_can_read(CharDriverState *s)
156 {
157     if (!s->chr_can_read)
158         return 0;
159     return s->chr_can_read(s->handler_opaque);
160 }
161 
qemu_chr_read(CharDriverState * s,uint8_t * buf,int len)162 void qemu_chr_read(CharDriverState *s, uint8_t *buf, int len)
163 {
164     s->chr_read(s->handler_opaque, buf, len);
165 }
166 
qemu_chr_get_msgfd(CharDriverState * s)167 int qemu_chr_get_msgfd(CharDriverState *s)
168 {
169     return s->get_msgfd ? s->get_msgfd(s) : -1;
170 }
171 
qemu_chr_accept_input(CharDriverState * s)172 void qemu_chr_accept_input(CharDriverState *s)
173 {
174     if (s->chr_accept_input)
175         s->chr_accept_input(s);
176 }
177 
qemu_chr_printf(CharDriverState * s,const char * fmt,...)178 void qemu_chr_printf(CharDriverState *s, const char *fmt, ...)
179 {
180     char buf[READ_BUF_LEN];
181     va_list ap;
182     va_start(ap, fmt);
183     vsnprintf(buf, sizeof(buf), fmt, ap);
184     qemu_chr_write(s, (uint8_t *)buf, strlen(buf));
185     va_end(ap);
186 }
187 
qemu_chr_send_event(CharDriverState * s,int event)188 void qemu_chr_send_event(CharDriverState *s, int event)
189 {
190     if (s->chr_send_event)
191         s->chr_send_event(s, event);
192 }
193 
qemu_chr_add_handlers(CharDriverState * s,IOCanReadHandler * fd_can_read,IOReadHandler * fd_read,IOEventHandler * fd_event,void * opaque)194 void qemu_chr_add_handlers(CharDriverState *s,
195                            IOCanReadHandler *fd_can_read,
196                            IOReadHandler *fd_read,
197                            IOEventHandler *fd_event,
198                            void *opaque)
199 {
200     s->chr_can_read = fd_can_read;
201     s->chr_read = fd_read;
202     s->chr_event = fd_event;
203     s->handler_opaque = opaque;
204     if (s->chr_update_read_handler)
205         s->chr_update_read_handler(s);
206 
207     /* We're connecting to an already opened device, so let's make sure we
208        also get the open event */
209     if (s->opened) {
210         qemu_chr_generic_open(s);
211     }
212 }
213 
null_chr_write(CharDriverState * chr,const uint8_t * buf,int len)214 static int null_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
215 {
216     return len;
217 }
218 
qemu_chr_open_null(QemuOpts * opts)219 static CharDriverState *qemu_chr_open_null(QemuOpts *opts)
220 {
221     CharDriverState *chr;
222 
223     chr = qemu_mallocz(sizeof(CharDriverState));
224     chr->chr_write = null_chr_write;
225     return chr;
226 }
227 
228 /* MUX driver for serial I/O splitting */
229 #define MAX_MUX 4
230 #define MUX_BUFFER_SIZE 32	/* Must be a power of 2.  */
231 #define MUX_BUFFER_MASK (MUX_BUFFER_SIZE - 1)
232 typedef struct {
233     IOCanReadHandler *chr_can_read[MAX_MUX];
234     IOReadHandler *chr_read[MAX_MUX];
235     IOEventHandler *chr_event[MAX_MUX];
236     void *ext_opaque[MAX_MUX];
237     CharDriverState *drv;
238     int focus;
239     int mux_cnt;
240     int term_got_escape;
241     int max_size;
242     /* Intermediate input buffer allows to catch escape sequences even if the
243        currently active device is not accepting any input - but only until it
244        is full as well. */
245     unsigned char buffer[MAX_MUX][MUX_BUFFER_SIZE];
246     int prod[MAX_MUX];
247     int cons[MAX_MUX];
248     int timestamps;
249     int linestart;
250     int64_t timestamps_start;
251 } MuxDriver;
252 
253 
mux_chr_write(CharDriverState * chr,const uint8_t * buf,int len)254 static int mux_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
255 {
256     MuxDriver *d = chr->opaque;
257     int ret;
258     if (!d->timestamps) {
259         ret = d->drv->chr_write(d->drv, buf, len);
260     } else {
261         int i;
262 
263         ret = 0;
264         for (i = 0; i < len; i++) {
265             if (d->linestart) {
266                 char buf1[64];
267                 int64_t ti;
268                 int secs;
269 
270                 ti = qemu_get_clock(rt_clock);
271                 if (d->timestamps_start == -1)
272                     d->timestamps_start = ti;
273                 ti -= d->timestamps_start;
274                 secs = ti / 1000;
275                 snprintf(buf1, sizeof(buf1),
276                          "[%02d:%02d:%02d.%03d] ",
277                          secs / 3600,
278                          (secs / 60) % 60,
279                          secs % 60,
280                          (int)(ti % 1000));
281                 d->drv->chr_write(d->drv, (uint8_t *)buf1, strlen(buf1));
282                 d->linestart = 0;
283             }
284             ret += d->drv->chr_write(d->drv, buf+i, 1);
285             if (buf[i] == '\n') {
286                 d->linestart = 1;
287             }
288         }
289     }
290     return ret;
291 }
292 
293 static const char * const mux_help[] = {
294     "% h    print this help\n\r",
295     "% x    exit emulator\n\r",
296     "% s    save disk data back to file (if -snapshot)\n\r",
297     "% t    toggle console timestamps\n\r"
298     "% b    send break (magic sysrq)\n\r",
299     "% c    switch between console and monitor\n\r",
300     "% %  sends %\n\r",
301     NULL
302 };
303 
304 int term_escape_char = 0x01; /* ctrl-a is used for escape */
mux_print_help(CharDriverState * chr)305 static void mux_print_help(CharDriverState *chr)
306 {
307     int i, j;
308     char ebuf[15] = "Escape-Char";
309     char cbuf[50] = "\n\r";
310 
311     if (term_escape_char > 0 && term_escape_char < 26) {
312         snprintf(cbuf, sizeof(cbuf), "\n\r");
313         snprintf(ebuf, sizeof(ebuf), "C-%c", term_escape_char - 1 + 'a');
314     } else {
315         snprintf(cbuf, sizeof(cbuf),
316                  "\n\rEscape-Char set to Ascii: 0x%02x\n\r\n\r",
317                  term_escape_char);
318     }
319     chr->chr_write(chr, (uint8_t *)cbuf, strlen(cbuf));
320     for (i = 0; mux_help[i] != NULL; i++) {
321         for (j=0; mux_help[i][j] != '\0'; j++) {
322             if (mux_help[i][j] == '%')
323                 chr->chr_write(chr, (uint8_t *)ebuf, strlen(ebuf));
324             else
325                 chr->chr_write(chr, (uint8_t *)&mux_help[i][j], 1);
326         }
327     }
328 }
329 
mux_chr_send_event(MuxDriver * d,int mux_nr,int event)330 static void mux_chr_send_event(MuxDriver *d, int mux_nr, int event)
331 {
332     if (d->chr_event[mux_nr])
333         d->chr_event[mux_nr](d->ext_opaque[mux_nr], event);
334 }
335 
mux_proc_byte(CharDriverState * chr,MuxDriver * d,int ch)336 static int mux_proc_byte(CharDriverState *chr, MuxDriver *d, int ch)
337 {
338     if (d->term_got_escape) {
339         d->term_got_escape = 0;
340         if (ch == term_escape_char)
341             goto send_char;
342         switch(ch) {
343         case '?':
344         case 'h':
345             mux_print_help(chr);
346             break;
347         case 'x':
348             {
349                  const char *term =  "QEMU: Terminated\n\r";
350                  chr->chr_write(chr,(uint8_t *)term,strlen(term));
351                  exit(0);
352                  break;
353             }
354         case 's':
355             bdrv_commit_all();
356             break;
357         case 'b':
358             qemu_chr_event(chr, CHR_EVENT_BREAK);
359             break;
360         case 'c':
361             /* Switch to the next registered device */
362             mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
363             d->focus++;
364             if (d->focus >= d->mux_cnt)
365                 d->focus = 0;
366             mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
367             break;
368         case 't':
369             d->timestamps = !d->timestamps;
370             d->timestamps_start = -1;
371             d->linestart = 0;
372             break;
373         }
374     } else if (ch == term_escape_char) {
375         d->term_got_escape = 1;
376     } else {
377     send_char:
378         return 1;
379     }
380     return 0;
381 }
382 
mux_chr_accept_input(CharDriverState * chr)383 static void mux_chr_accept_input(CharDriverState *chr)
384 {
385     MuxDriver *d = chr->opaque;
386     int m = d->focus;
387 
388     while (d->prod[m] != d->cons[m] &&
389            d->chr_can_read[m] &&
390            d->chr_can_read[m](d->ext_opaque[m])) {
391         d->chr_read[m](d->ext_opaque[m],
392                        &d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1);
393     }
394 }
395 
mux_chr_can_read(void * opaque)396 static int mux_chr_can_read(void *opaque)
397 {
398     CharDriverState *chr = opaque;
399     MuxDriver *d = chr->opaque;
400     int m = d->focus;
401 
402     if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE)
403         return 1;
404     if (d->chr_can_read[m])
405         return d->chr_can_read[m](d->ext_opaque[m]);
406     return 0;
407 }
408 
mux_chr_read(void * opaque,const uint8_t * buf,int size)409 static void mux_chr_read(void *opaque, const uint8_t *buf, int size)
410 {
411     CharDriverState *chr = opaque;
412     MuxDriver *d = chr->opaque;
413     int m = d->focus;
414     int i;
415 
416     mux_chr_accept_input (opaque);
417 
418     for(i = 0; i < size; i++)
419         if (mux_proc_byte(chr, d, buf[i])) {
420             if (d->prod[m] == d->cons[m] &&
421                 d->chr_can_read[m] &&
422                 d->chr_can_read[m](d->ext_opaque[m]))
423                 d->chr_read[m](d->ext_opaque[m], &buf[i], 1);
424             else
425                 d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i];
426         }
427 }
428 
mux_chr_event(void * opaque,int event)429 static void mux_chr_event(void *opaque, int event)
430 {
431     CharDriverState *chr = opaque;
432     MuxDriver *d = chr->opaque;
433     int i;
434 
435     /* Send the event to all registered listeners */
436     for (i = 0; i < d->mux_cnt; i++)
437         mux_chr_send_event(d, i, event);
438 }
439 
mux_chr_update_read_handler(CharDriverState * chr)440 static void mux_chr_update_read_handler(CharDriverState *chr)
441 {
442     MuxDriver *d = chr->opaque;
443 
444     if (d->mux_cnt >= MAX_MUX) {
445         fprintf(stderr, "Cannot add I/O handlers, MUX array is full\n");
446         return;
447     }
448     d->ext_opaque[d->mux_cnt] = chr->handler_opaque;
449     d->chr_can_read[d->mux_cnt] = chr->chr_can_read;
450     d->chr_read[d->mux_cnt] = chr->chr_read;
451     d->chr_event[d->mux_cnt] = chr->chr_event;
452     /* Fix up the real driver with mux routines */
453     if (d->mux_cnt == 0) {
454         qemu_chr_add_handlers(d->drv, mux_chr_can_read, mux_chr_read,
455                               mux_chr_event, chr);
456     }
457     if (d->focus != -1) {
458         mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
459     }
460     d->focus = d->mux_cnt;
461     d->mux_cnt++;
462     mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
463 }
464 
qemu_chr_open_mux(CharDriverState * drv)465 static CharDriverState *qemu_chr_open_mux(CharDriverState *drv)
466 {
467     CharDriverState *chr;
468     MuxDriver *d;
469 
470     chr = qemu_mallocz(sizeof(CharDriverState));
471     d = qemu_mallocz(sizeof(MuxDriver));
472 
473     chr->opaque = d;
474     d->drv = drv;
475     d->focus = -1;
476     chr->chr_write = mux_chr_write;
477     chr->chr_update_read_handler = mux_chr_update_read_handler;
478     chr->chr_accept_input = mux_chr_accept_input;
479 
480     /* Muxes are always open on creation */
481     qemu_chr_generic_open(chr);
482 
483     return chr;
484 }
485 
486 
487 #ifdef _WIN32
send_all(int fd,const void * buf,int len1)488 int send_all(int fd, const void *buf, int len1)
489 {
490     int ret, len;
491 
492     len = len1;
493     while (len > 0) {
494         ret = send(fd, buf, len, 0);
495         if (ret < 0) {
496             errno = WSAGetLastError();
497             if (errno != WSAEWOULDBLOCK) {
498                 return -1;
499             }
500         } else if (ret == 0) {
501             break;
502         } else {
503             buf += ret;
504             len -= ret;
505         }
506     }
507     return len1 - len;
508 }
509 
510 #else
511 
send_all(int fd,const void * _buf,int len1)512 int send_all(int fd, const void *_buf, int len1)
513 {
514     int ret, len;
515     const uint8_t *buf = _buf;
516 
517     len = len1;
518     while (len > 0) {
519         ret = write(fd, buf, len);
520         if (ret < 0) {
521             if (errno != EINTR && errno != EAGAIN)
522                 return -1;
523         } else if (ret == 0) {
524             break;
525         } else {
526             buf += ret;
527             len -= ret;
528         }
529     }
530     return len1 - len;
531 }
532 #endif /* !_WIN32 */
533 
534 #ifndef _WIN32
535 
536 typedef struct {
537     int fd_in, fd_out;
538     int max_size;
539 } FDCharDriver;
540 
541 #define STDIO_MAX_CLIENTS 1
542 static int stdio_nb_clients = 0;
543 
fd_chr_write(CharDriverState * chr,const uint8_t * buf,int len)544 static int fd_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
545 {
546     FDCharDriver *s = chr->opaque;
547     return send_all(s->fd_out, buf, len);
548 }
549 
fd_chr_read_poll(void * opaque)550 static int fd_chr_read_poll(void *opaque)
551 {
552     CharDriverState *chr = opaque;
553     FDCharDriver *s = chr->opaque;
554 
555     s->max_size = qemu_chr_can_read(chr);
556     return s->max_size;
557 }
558 
fd_chr_read(void * opaque)559 static void fd_chr_read(void *opaque)
560 {
561     CharDriverState *chr = opaque;
562     FDCharDriver *s = chr->opaque;
563     int size, len;
564     uint8_t buf[READ_BUF_LEN];
565 
566     len = sizeof(buf);
567     if (len > s->max_size)
568         len = s->max_size;
569     if (len == 0)
570         return;
571     size = read(s->fd_in, buf, len);
572     if (size == 0) {
573         /* FD has been closed. Remove it from the active list.  */
574         qemu_set_fd_handler2(s->fd_in, NULL, NULL, NULL, NULL);
575         qemu_chr_event(chr, CHR_EVENT_CLOSED);
576         return;
577     }
578     if (size > 0) {
579         qemu_chr_read(chr, buf, size);
580     }
581 }
582 
fd_chr_update_read_handler(CharDriverState * chr)583 static void fd_chr_update_read_handler(CharDriverState *chr)
584 {
585     FDCharDriver *s = chr->opaque;
586 
587     if (s->fd_in >= 0) {
588         if (display_type == DT_NOGRAPHIC && s->fd_in == 0) {
589         } else {
590             qemu_set_fd_handler2(s->fd_in, fd_chr_read_poll,
591                                  fd_chr_read, NULL, chr);
592         }
593     }
594 }
595 
fd_chr_close(struct CharDriverState * chr)596 static void fd_chr_close(struct CharDriverState *chr)
597 {
598     FDCharDriver *s = chr->opaque;
599 
600     if (s->fd_in >= 0) {
601         if (display_type == DT_NOGRAPHIC && s->fd_in == 0) {
602         } else {
603             qemu_set_fd_handler2(s->fd_in, NULL, NULL, NULL, NULL);
604         }
605     }
606 
607     qemu_free(s);
608     qemu_chr_event(chr, CHR_EVENT_CLOSED);
609 }
610 
611 /* open a character device to a unix fd */
qemu_chr_open_fd(int fd_in,int fd_out)612 static CharDriverState *qemu_chr_open_fd(int fd_in, int fd_out)
613 {
614     CharDriverState *chr;
615     FDCharDriver *s;
616 
617     chr = qemu_mallocz(sizeof(CharDriverState));
618     s = qemu_mallocz(sizeof(FDCharDriver));
619     s->fd_in = fd_in;
620     s->fd_out = fd_out;
621     chr->opaque = s;
622     chr->chr_write = fd_chr_write;
623     chr->chr_update_read_handler = fd_chr_update_read_handler;
624     chr->chr_close = fd_chr_close;
625 
626     qemu_chr_generic_open(chr);
627 
628     return chr;
629 }
630 
qemu_chr_open_file_out(QemuOpts * opts)631 static CharDriverState *qemu_chr_open_file_out(QemuOpts *opts)
632 {
633     int fd_out;
634 
635     TFR(fd_out = qemu_open(qemu_opt_get(opts, "path"),
636                       O_WRONLY | O_TRUNC | O_CREAT | O_BINARY, 0666));
637     if (fd_out < 0)
638         return NULL;
639     return qemu_chr_open_fd(-1, fd_out);
640 }
641 
qemu_chr_open_pipe(QemuOpts * opts)642 static CharDriverState *qemu_chr_open_pipe(QemuOpts *opts)
643 {
644     int fd_in, fd_out;
645     char filename_in[256], filename_out[256];
646     const char *filename = qemu_opt_get(opts, "path");
647 
648     if (filename == NULL) {
649         fprintf(stderr, "chardev: pipe: no filename given\n");
650         return NULL;
651     }
652 
653     snprintf(filename_in, 256, "%s.in", filename);
654     snprintf(filename_out, 256, "%s.out", filename);
655     TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY));
656     TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY));
657     if (fd_in < 0 || fd_out < 0) {
658 	if (fd_in >= 0)
659 	    close(fd_in);
660 	if (fd_out >= 0)
661 	    close(fd_out);
662         TFR(fd_in = fd_out = open(filename, O_RDWR | O_BINARY));
663         if (fd_in < 0)
664             return NULL;
665     }
666     return qemu_chr_open_fd(fd_in, fd_out);
667 }
668 
669 
670 /* for STDIO, we handle the case where several clients use it
671    (nographic mode) */
672 
673 #define TERM_FIFO_MAX_SIZE 1
674 
675 static uint8_t term_fifo[TERM_FIFO_MAX_SIZE];
676 static int term_fifo_size;
677 
stdio_read_poll(void * opaque)678 static int stdio_read_poll(void *opaque)
679 {
680     CharDriverState *chr = opaque;
681 
682     /* try to flush the queue if needed */
683     if (term_fifo_size != 0 && qemu_chr_can_read(chr) > 0) {
684         qemu_chr_read(chr, term_fifo, 1);
685         term_fifo_size = 0;
686     }
687     /* see if we can absorb more chars */
688     if (term_fifo_size == 0)
689         return 1;
690     else
691         return 0;
692 }
693 
stdio_read(void * opaque)694 static void stdio_read(void *opaque)
695 {
696     int size;
697     uint8_t buf[1];
698     CharDriverState *chr = opaque;
699 
700     size = read(0, buf, 1);
701     if (size == 0) {
702         /* stdin has been closed. Remove it from the active list.  */
703         qemu_set_fd_handler2(0, NULL, NULL, NULL, NULL);
704         qemu_chr_event(chr, CHR_EVENT_CLOSED);
705         return;
706     }
707     if (size > 0) {
708         if (qemu_chr_can_read(chr) > 0) {
709             qemu_chr_read(chr, buf, 1);
710         } else if (term_fifo_size == 0) {
711             term_fifo[term_fifo_size++] = buf[0];
712         }
713     }
714 }
715 
716 /* init terminal so that we can grab keys */
717 static struct termios oldtty;
718 static int old_fd0_flags;
719 static bool stdio_allow_signal;
720 
term_exit(void)721 static void term_exit(void)
722 {
723     tcsetattr (0, TCSANOW, &oldtty);
724     fcntl(0, F_SETFL, old_fd0_flags);
725 }
726 
qemu_chr_set_echo_stdio(CharDriverState * chr,bool echo)727 static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo)
728 {
729     struct termios tty;
730 
731     tty = oldtty;
732     if (!echo) {
733         tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
734                           |INLCR|IGNCR|ICRNL|IXON);
735         tty.c_oflag |= OPOST;
736         tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
737         tty.c_cflag &= ~(CSIZE|PARENB);
738         tty.c_cflag |= CS8;
739         tty.c_cc[VMIN] = 1;
740         tty.c_cc[VTIME] = 0;
741     }
742     /* if graphical mode, we allow Ctrl-C handling */
743     if (!stdio_allow_signal)
744         tty.c_lflag &= ~ISIG;
745 
746     tcsetattr (0, TCSANOW, &tty);
747 }
748 
qemu_chr_close_stdio(struct CharDriverState * chr)749 static void qemu_chr_close_stdio(struct CharDriverState *chr)
750 {
751     term_exit();
752     stdio_nb_clients--;
753     qemu_set_fd_handler2(0, NULL, NULL, NULL, NULL);
754     fd_chr_close(chr);
755 }
756 
qemu_chr_open_stdio(QemuOpts * opts)757 static CharDriverState *qemu_chr_open_stdio(QemuOpts *opts)
758 {
759     CharDriverState *chr;
760 
761     if (stdio_nb_clients >= STDIO_MAX_CLIENTS)
762         return NULL;
763     if (stdio_nb_clients == 0) {
764         old_fd0_flags = fcntl(0, F_GETFL);
765         tcgetattr (0, &oldtty);
766         fcntl(0, F_SETFL, O_NONBLOCK);
767         atexit(term_exit);
768     }
769 
770     chr = qemu_chr_open_fd(0, 1);
771     chr->chr_close = qemu_chr_close_stdio;
772     chr->chr_set_echo = qemu_chr_set_echo_stdio;
773     qemu_set_fd_handler2(0, stdio_read_poll, stdio_read, NULL, chr);
774     stdio_nb_clients++;
775     stdio_allow_signal = qemu_opt_get_bool(opts, "signal",
776                                            display_type != DT_NOGRAPHIC);
777     qemu_chr_set_echo(chr, false);
778 
779     return chr;
780 }
781 
782 #ifdef __sun__
783 /* Once Solaris has openpty(), this is going to be removed. */
openpty(int * amaster,int * aslave,char * name,struct termios * termp,struct winsize * winp)784 static int openpty(int *amaster, int *aslave, char *name,
785                    struct termios *termp, struct winsize *winp)
786 {
787         const char *slave;
788         int mfd = -1, sfd = -1;
789 
790         *amaster = *aslave = -1;
791 
792         mfd = open("/dev/ptmx", O_RDWR | O_NOCTTY);
793         if (mfd < 0)
794                 goto err;
795 
796         if (grantpt(mfd) == -1 || unlockpt(mfd) == -1)
797                 goto err;
798 
799         if ((slave = ptsname(mfd)) == NULL)
800                 goto err;
801 
802         if ((sfd = open(slave, O_RDONLY | O_NOCTTY)) == -1)
803                 goto err;
804 
805         if (ioctl(sfd, I_PUSH, "ptem") == -1 ||
806             (termp != NULL && tcgetattr(sfd, termp) < 0))
807                 goto err;
808 
809         if (amaster)
810                 *amaster = mfd;
811         if (aslave)
812                 *aslave = sfd;
813         if (winp)
814                 ioctl(sfd, TIOCSWINSZ, winp);
815 
816         return 0;
817 
818 err:
819         if (sfd != -1)
820                 close(sfd);
821         close(mfd);
822         return -1;
823 }
824 
cfmakeraw(struct termios * termios_p)825 static void cfmakeraw (struct termios *termios_p)
826 {
827         termios_p->c_iflag &=
828                 ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
829         termios_p->c_oflag &= ~OPOST;
830         termios_p->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
831         termios_p->c_cflag &= ~(CSIZE|PARENB);
832         termios_p->c_cflag |= CS8;
833 
834         termios_p->c_cc[VMIN] = 0;
835         termios_p->c_cc[VTIME] = 0;
836 }
837 #endif
838 
839 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
840     || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
841     || defined(__GLIBC__)
842 
843 typedef struct {
844     int fd;
845     int connected;
846     int polling;
847     int read_bytes;
848     QEMUTimer *timer;
849 } PtyCharDriver;
850 
851 static void pty_chr_update_read_handler(CharDriverState *chr);
852 static void pty_chr_state(CharDriverState *chr, int connected);
853 
pty_chr_write(CharDriverState * chr,const uint8_t * buf,int len)854 static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
855 {
856     PtyCharDriver *s = chr->opaque;
857 
858     if (!s->connected) {
859         /* guest sends data, check for (re-)connect */
860         pty_chr_update_read_handler(chr);
861         return 0;
862     }
863     return send_all(s->fd, buf, len);
864 }
865 
pty_chr_read_poll(void * opaque)866 static int pty_chr_read_poll(void *opaque)
867 {
868     CharDriverState *chr = opaque;
869     PtyCharDriver *s = chr->opaque;
870 
871     s->read_bytes = qemu_chr_can_read(chr);
872     return s->read_bytes;
873 }
874 
pty_chr_read(void * opaque)875 static void pty_chr_read(void *opaque)
876 {
877     CharDriverState *chr = opaque;
878     PtyCharDriver *s = chr->opaque;
879     int size, len;
880     uint8_t buf[READ_BUF_LEN];
881 
882     len = sizeof(buf);
883     if (len > s->read_bytes)
884         len = s->read_bytes;
885     if (len == 0)
886         return;
887     size = read(s->fd, buf, len);
888     if ((size == -1 && errno == EIO) ||
889         (size == 0)) {
890         pty_chr_state(chr, 0);
891         return;
892     }
893     if (size > 0) {
894         pty_chr_state(chr, 1);
895         qemu_chr_read(chr, buf, size);
896     }
897 }
898 
pty_chr_update_read_handler(CharDriverState * chr)899 static void pty_chr_update_read_handler(CharDriverState *chr)
900 {
901     PtyCharDriver *s = chr->opaque;
902 
903     qemu_set_fd_handler2(s->fd, pty_chr_read_poll,
904                          pty_chr_read, NULL, chr);
905     s->polling = 1;
906     /*
907      * Short timeout here: just need wait long enougth that qemu makes
908      * it through the poll loop once.  When reconnected we want a
909      * short timeout so we notice it almost instantly.  Otherwise
910      * read() gives us -EIO instantly, making pty_chr_state() reset the
911      * timeout to the normal (much longer) poll interval before the
912      * timer triggers.
913      */
914     qemu_mod_timer(s->timer, qemu_get_clock(rt_clock) + 10);
915 }
916 
pty_chr_state(CharDriverState * chr,int connected)917 static void pty_chr_state(CharDriverState *chr, int connected)
918 {
919     PtyCharDriver *s = chr->opaque;
920 
921     if (!connected) {
922         qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
923         s->connected = 0;
924         s->polling = 0;
925         /* (re-)connect poll interval for idle guests: once per second.
926          * We check more frequently in case the guests sends data to
927          * the virtual device linked to our pty. */
928         qemu_mod_timer(s->timer, qemu_get_clock(rt_clock) + 1000);
929     } else {
930         if (!s->connected)
931             qemu_chr_generic_open(chr);
932         s->connected = 1;
933     }
934 }
935 
pty_chr_timer(void * opaque)936 static void pty_chr_timer(void *opaque)
937 {
938     struct CharDriverState *chr = opaque;
939     PtyCharDriver *s = chr->opaque;
940 
941     if (s->connected)
942         return;
943     if (s->polling) {
944         /* If we arrive here without polling being cleared due
945          * read returning -EIO, then we are (re-)connected */
946         pty_chr_state(chr, 1);
947         return;
948     }
949 
950     /* Next poll ... */
951     pty_chr_update_read_handler(chr);
952 }
953 
pty_chr_close(struct CharDriverState * chr)954 static void pty_chr_close(struct CharDriverState *chr)
955 {
956     PtyCharDriver *s = chr->opaque;
957 
958     qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
959     close(s->fd);
960     qemu_del_timer(s->timer);
961     qemu_free_timer(s->timer);
962     qemu_free(s);
963     qemu_chr_event(chr, CHR_EVENT_CLOSED);
964 }
965 
qemu_chr_open_pty(QemuOpts * opts)966 static CharDriverState *qemu_chr_open_pty(QemuOpts *opts)
967 {
968     CharDriverState *chr;
969     PtyCharDriver *s;
970     struct termios tty;
971     int slave_fd, len;
972 #if defined(__OpenBSD__) || defined(__DragonFly__)
973     char pty_name[PATH_MAX];
974 #define q_ptsname(x) pty_name
975 #else
976     char *pty_name = NULL;
977 #define q_ptsname(x) ptsname(x)
978 #endif
979 
980     chr = qemu_mallocz(sizeof(CharDriverState));
981     s = qemu_mallocz(sizeof(PtyCharDriver));
982 
983     if (openpty(&s->fd, &slave_fd, pty_name, NULL, NULL) < 0) {
984         return NULL;
985     }
986 
987     /* Set raw attributes on the pty. */
988     tcgetattr(slave_fd, &tty);
989     cfmakeraw(&tty);
990     tcsetattr(slave_fd, TCSAFLUSH, &tty);
991     close(slave_fd);
992 
993     len = strlen(q_ptsname(s->fd)) + 5;
994     chr->filename = qemu_malloc(len);
995     snprintf(chr->filename, len, "pty:%s", q_ptsname(s->fd));
996     qemu_opt_set(opts, "path", q_ptsname(s->fd));
997     fprintf(stderr, "char device redirected to %s\n", q_ptsname(s->fd));
998 
999     chr->opaque = s;
1000     chr->chr_write = pty_chr_write;
1001     chr->chr_update_read_handler = pty_chr_update_read_handler;
1002     chr->chr_close = pty_chr_close;
1003 
1004     s->timer = qemu_new_timer(rt_clock, pty_chr_timer, chr);
1005 
1006     return chr;
1007 }
1008 
tty_serial_init(int fd,int speed,int parity,int data_bits,int stop_bits)1009 static void tty_serial_init(int fd, int speed,
1010                             int parity, int data_bits, int stop_bits)
1011 {
1012     struct termios tty;
1013     speed_t spd;
1014 
1015 #if 0
1016     printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
1017            speed, parity, data_bits, stop_bits);
1018 #endif
1019     tcgetattr (fd, &tty);
1020 
1021 #define check_speed(val) if (speed <= val) { spd = B##val; break; }
1022     speed = speed * 10 / 11;
1023     do {
1024         check_speed(50);
1025         check_speed(75);
1026         check_speed(110);
1027         check_speed(134);
1028         check_speed(150);
1029         check_speed(200);
1030         check_speed(300);
1031         check_speed(600);
1032         check_speed(1200);
1033         check_speed(1800);
1034         check_speed(2400);
1035         check_speed(4800);
1036         check_speed(9600);
1037         check_speed(19200);
1038         check_speed(38400);
1039         /* Non-Posix values follow. They may be unsupported on some systems. */
1040         check_speed(57600);
1041         check_speed(115200);
1042 #ifdef B230400
1043         check_speed(230400);
1044 #endif
1045 #ifdef B460800
1046         check_speed(460800);
1047 #endif
1048 #ifdef B500000
1049         check_speed(500000);
1050 #endif
1051 #ifdef B576000
1052         check_speed(576000);
1053 #endif
1054 #ifdef B921600
1055         check_speed(921600);
1056 #endif
1057 #ifdef B1000000
1058         check_speed(1000000);
1059 #endif
1060 #ifdef B1152000
1061         check_speed(1152000);
1062 #endif
1063 #ifdef B1500000
1064         check_speed(1500000);
1065 #endif
1066 #ifdef B2000000
1067         check_speed(2000000);
1068 #endif
1069 #ifdef B2500000
1070         check_speed(2500000);
1071 #endif
1072 #ifdef B3000000
1073         check_speed(3000000);
1074 #endif
1075 #ifdef B3500000
1076         check_speed(3500000);
1077 #endif
1078 #ifdef B4000000
1079         check_speed(4000000);
1080 #endif
1081         spd = B115200;
1082     } while (0);
1083 
1084     cfsetispeed(&tty, spd);
1085     cfsetospeed(&tty, spd);
1086 
1087     tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1088                           |INLCR|IGNCR|ICRNL|IXON);
1089     tty.c_oflag |= OPOST;
1090     tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
1091     tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB);
1092     switch(data_bits) {
1093     default:
1094     case 8:
1095         tty.c_cflag |= CS8;
1096         break;
1097     case 7:
1098         tty.c_cflag |= CS7;
1099         break;
1100     case 6:
1101         tty.c_cflag |= CS6;
1102         break;
1103     case 5:
1104         tty.c_cflag |= CS5;
1105         break;
1106     }
1107     switch(parity) {
1108     default:
1109     case 'N':
1110         break;
1111     case 'E':
1112         tty.c_cflag |= PARENB;
1113         break;
1114     case 'O':
1115         tty.c_cflag |= PARENB | PARODD;
1116         break;
1117     }
1118     if (stop_bits == 2)
1119         tty.c_cflag |= CSTOPB;
1120 
1121     tcsetattr (fd, TCSANOW, &tty);
1122 }
1123 
tty_serial_ioctl(CharDriverState * chr,int cmd,void * arg)1124 static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg)
1125 {
1126     FDCharDriver *s = chr->opaque;
1127 
1128     switch(cmd) {
1129     case CHR_IOCTL_SERIAL_SET_PARAMS:
1130         {
1131             QEMUSerialSetParams *ssp = arg;
1132             tty_serial_init(s->fd_in, ssp->speed, ssp->parity,
1133                             ssp->data_bits, ssp->stop_bits);
1134         }
1135         break;
1136     case CHR_IOCTL_SERIAL_SET_BREAK:
1137         {
1138             int enable = *(int *)arg;
1139             if (enable)
1140                 tcsendbreak(s->fd_in, 1);
1141         }
1142         break;
1143     case CHR_IOCTL_SERIAL_GET_TIOCM:
1144         {
1145             int sarg = 0;
1146             int *targ = (int *)arg;
1147             ioctl(s->fd_in, TIOCMGET, &sarg);
1148             *targ = 0;
1149             if (sarg & TIOCM_CTS)
1150                 *targ |= CHR_TIOCM_CTS;
1151             if (sarg & TIOCM_CAR)
1152                 *targ |= CHR_TIOCM_CAR;
1153             if (sarg & TIOCM_DSR)
1154                 *targ |= CHR_TIOCM_DSR;
1155             if (sarg & TIOCM_RI)
1156                 *targ |= CHR_TIOCM_RI;
1157             if (sarg & TIOCM_DTR)
1158                 *targ |= CHR_TIOCM_DTR;
1159             if (sarg & TIOCM_RTS)
1160                 *targ |= CHR_TIOCM_RTS;
1161         }
1162         break;
1163     case CHR_IOCTL_SERIAL_SET_TIOCM:
1164         {
1165             int sarg = *(int *)arg;
1166             int targ = 0;
1167             ioctl(s->fd_in, TIOCMGET, &targ);
1168             targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
1169                      | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
1170             if (sarg & CHR_TIOCM_CTS)
1171                 targ |= TIOCM_CTS;
1172             if (sarg & CHR_TIOCM_CAR)
1173                 targ |= TIOCM_CAR;
1174             if (sarg & CHR_TIOCM_DSR)
1175                 targ |= TIOCM_DSR;
1176             if (sarg & CHR_TIOCM_RI)
1177                 targ |= TIOCM_RI;
1178             if (sarg & CHR_TIOCM_DTR)
1179                 targ |= TIOCM_DTR;
1180             if (sarg & CHR_TIOCM_RTS)
1181                 targ |= TIOCM_RTS;
1182             ioctl(s->fd_in, TIOCMSET, &targ);
1183         }
1184         break;
1185     default:
1186         return -ENOTSUP;
1187     }
1188     return 0;
1189 }
1190 
qemu_chr_close_tty(CharDriverState * chr)1191 static void qemu_chr_close_tty(CharDriverState *chr)
1192 {
1193     FDCharDriver *s = chr->opaque;
1194     int fd = -1;
1195 
1196     if (s) {
1197         fd = s->fd_in;
1198     }
1199 
1200     fd_chr_close(chr);
1201 
1202     if (fd >= 0) {
1203         close(fd);
1204     }
1205 }
1206 
qemu_chr_open_tty(QemuOpts * opts)1207 static CharDriverState *qemu_chr_open_tty(QemuOpts *opts)
1208 {
1209     const char *filename = qemu_opt_get(opts, "path");
1210     CharDriverState *chr;
1211     int fd;
1212 
1213     TFR(fd = open(filename, O_RDWR | O_NONBLOCK));
1214     if (fd < 0) {
1215         return NULL;
1216     }
1217     tty_serial_init(fd, 115200, 'N', 8, 1);
1218     chr = qemu_chr_open_fd(fd, fd);
1219     if (!chr) {
1220         close(fd);
1221         return NULL;
1222     }
1223     chr->chr_ioctl = tty_serial_ioctl;
1224     chr->chr_close = qemu_chr_close_tty;
1225     return chr;
1226 }
1227 #else  /* ! __linux__ && ! __sun__ */
qemu_chr_open_pty(QemuOpts * opts)1228 static CharDriverState *qemu_chr_open_pty(QemuOpts *opts)
1229 {
1230     return NULL;
1231 }
1232 #endif /* __linux__ || __sun__ */
1233 
1234 #if defined(__linux__)
1235 typedef struct {
1236     int fd;
1237     int mode;
1238 } ParallelCharDriver;
1239 
pp_hw_mode(ParallelCharDriver * s,uint16_t mode)1240 static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode)
1241 {
1242     if (s->mode != mode) {
1243 	int m = mode;
1244         if (ioctl(s->fd, PPSETMODE, &m) < 0)
1245             return 0;
1246 	s->mode = mode;
1247     }
1248     return 1;
1249 }
1250 
pp_ioctl(CharDriverState * chr,int cmd,void * arg)1251 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1252 {
1253     ParallelCharDriver *drv = chr->opaque;
1254     int fd = drv->fd;
1255     uint8_t b;
1256 
1257     switch(cmd) {
1258     case CHR_IOCTL_PP_READ_DATA:
1259         if (ioctl(fd, PPRDATA, &b) < 0)
1260             return -ENOTSUP;
1261         *(uint8_t *)arg = b;
1262         break;
1263     case CHR_IOCTL_PP_WRITE_DATA:
1264         b = *(uint8_t *)arg;
1265         if (ioctl(fd, PPWDATA, &b) < 0)
1266             return -ENOTSUP;
1267         break;
1268     case CHR_IOCTL_PP_READ_CONTROL:
1269         if (ioctl(fd, PPRCONTROL, &b) < 0)
1270             return -ENOTSUP;
1271 	/* Linux gives only the lowest bits, and no way to know data
1272 	   direction! For better compatibility set the fixed upper
1273 	   bits. */
1274         *(uint8_t *)arg = b | 0xc0;
1275         break;
1276     case CHR_IOCTL_PP_WRITE_CONTROL:
1277         b = *(uint8_t *)arg;
1278         if (ioctl(fd, PPWCONTROL, &b) < 0)
1279             return -ENOTSUP;
1280         break;
1281     case CHR_IOCTL_PP_READ_STATUS:
1282         if (ioctl(fd, PPRSTATUS, &b) < 0)
1283             return -ENOTSUP;
1284         *(uint8_t *)arg = b;
1285         break;
1286     case CHR_IOCTL_PP_DATA_DIR:
1287         if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
1288             return -ENOTSUP;
1289         break;
1290     case CHR_IOCTL_PP_EPP_READ_ADDR:
1291 	if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1292 	    struct ParallelIOArg *parg = arg;
1293 	    int n = read(fd, parg->buffer, parg->count);
1294 	    if (n != parg->count) {
1295 		return -EIO;
1296 	    }
1297 	}
1298         break;
1299     case CHR_IOCTL_PP_EPP_READ:
1300 	if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1301 	    struct ParallelIOArg *parg = arg;
1302 	    int n = read(fd, parg->buffer, parg->count);
1303 	    if (n != parg->count) {
1304 		return -EIO;
1305 	    }
1306 	}
1307         break;
1308     case CHR_IOCTL_PP_EPP_WRITE_ADDR:
1309 	if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1310 	    struct ParallelIOArg *parg = arg;
1311 	    int n = write(fd, parg->buffer, parg->count);
1312 	    if (n != parg->count) {
1313 		return -EIO;
1314 	    }
1315 	}
1316         break;
1317     case CHR_IOCTL_PP_EPP_WRITE:
1318 	if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1319 	    struct ParallelIOArg *parg = arg;
1320 	    int n = write(fd, parg->buffer, parg->count);
1321 	    if (n != parg->count) {
1322 		return -EIO;
1323 	    }
1324 	}
1325         break;
1326     default:
1327         return -ENOTSUP;
1328     }
1329     return 0;
1330 }
1331 
pp_close(CharDriverState * chr)1332 static void pp_close(CharDriverState *chr)
1333 {
1334     ParallelCharDriver *drv = chr->opaque;
1335     int fd = drv->fd;
1336 
1337     pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
1338     ioctl(fd, PPRELEASE);
1339     close(fd);
1340     qemu_free(drv);
1341     qemu_chr_event(chr, CHR_EVENT_CLOSED);
1342 }
1343 
qemu_chr_open_pp(QemuOpts * opts)1344 static CharDriverState *qemu_chr_open_pp(QemuOpts *opts)
1345 {
1346     const char *filename = qemu_opt_get(opts, "path");
1347     CharDriverState *chr;
1348     ParallelCharDriver *drv;
1349     int fd;
1350 
1351     TFR(fd = open(filename, O_RDWR));
1352     if (fd < 0)
1353         return NULL;
1354 
1355     if (ioctl(fd, PPCLAIM) < 0) {
1356         close(fd);
1357         return NULL;
1358     }
1359 
1360     drv = qemu_mallocz(sizeof(ParallelCharDriver));
1361     drv->fd = fd;
1362     drv->mode = IEEE1284_MODE_COMPAT;
1363 
1364     chr = qemu_mallocz(sizeof(CharDriverState));
1365     chr->chr_write = null_chr_write;
1366     chr->chr_ioctl = pp_ioctl;
1367     chr->chr_close = pp_close;
1368     chr->opaque = drv;
1369 
1370     qemu_chr_generic_open(chr);
1371 
1372     return chr;
1373 }
1374 #endif /* __linux__ */
1375 
1376 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
pp_ioctl(CharDriverState * chr,int cmd,void * arg)1377 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1378 {
1379     int fd = (int)(long)chr->opaque;
1380     uint8_t b;
1381 
1382     switch(cmd) {
1383     case CHR_IOCTL_PP_READ_DATA:
1384         if (ioctl(fd, PPIGDATA, &b) < 0)
1385             return -ENOTSUP;
1386         *(uint8_t *)arg = b;
1387         break;
1388     case CHR_IOCTL_PP_WRITE_DATA:
1389         b = *(uint8_t *)arg;
1390         if (ioctl(fd, PPISDATA, &b) < 0)
1391             return -ENOTSUP;
1392         break;
1393     case CHR_IOCTL_PP_READ_CONTROL:
1394         if (ioctl(fd, PPIGCTRL, &b) < 0)
1395             return -ENOTSUP;
1396         *(uint8_t *)arg = b;
1397         break;
1398     case CHR_IOCTL_PP_WRITE_CONTROL:
1399         b = *(uint8_t *)arg;
1400         if (ioctl(fd, PPISCTRL, &b) < 0)
1401             return -ENOTSUP;
1402         break;
1403     case CHR_IOCTL_PP_READ_STATUS:
1404         if (ioctl(fd, PPIGSTATUS, &b) < 0)
1405             return -ENOTSUP;
1406         *(uint8_t *)arg = b;
1407         break;
1408     default:
1409         return -ENOTSUP;
1410     }
1411     return 0;
1412 }
1413 
qemu_chr_open_pp(QemuOpts * opts)1414 static CharDriverState *qemu_chr_open_pp(QemuOpts *opts)
1415 {
1416     const char *filename = qemu_opt_get(opts, "path");
1417     CharDriverState *chr;
1418     int fd;
1419 
1420     fd = open(filename, O_RDWR);
1421     if (fd < 0)
1422         return NULL;
1423 
1424     chr = qemu_mallocz(sizeof(CharDriverState));
1425     chr->opaque = (void *)(long)fd;
1426     chr->chr_write = null_chr_write;
1427     chr->chr_ioctl = pp_ioctl;
1428     return chr;
1429 }
1430 #endif
1431 
1432 #else /* _WIN32 */
1433 
1434 typedef struct {
1435     int max_size;
1436     HANDLE hcom, hrecv, hsend;
1437     OVERLAPPED orecv, osend;
1438     BOOL fpipe;
1439     DWORD len;
1440 } WinCharState;
1441 
1442 #define NSENDBUF 2048
1443 #define NRECVBUF 2048
1444 #define MAXCONNECT 1
1445 #define NTIMEOUT 5000
1446 
1447 static int win_chr_poll(void *opaque);
1448 static int win_chr_pipe_poll(void *opaque);
1449 
win_chr_close(CharDriverState * chr)1450 static void win_chr_close(CharDriverState *chr)
1451 {
1452     WinCharState *s = chr->opaque;
1453 
1454     if (s->hsend) {
1455         CloseHandle(s->hsend);
1456         s->hsend = NULL;
1457     }
1458     if (s->hrecv) {
1459         CloseHandle(s->hrecv);
1460         s->hrecv = NULL;
1461     }
1462     if (s->hcom) {
1463         CloseHandle(s->hcom);
1464         s->hcom = NULL;
1465     }
1466     if (s->fpipe)
1467         qemu_del_polling_cb(win_chr_pipe_poll, chr);
1468     else
1469         qemu_del_polling_cb(win_chr_poll, chr);
1470 
1471     qemu_chr_event(chr, CHR_EVENT_CLOSED);
1472 }
1473 
win_chr_init(CharDriverState * chr,const char * filename)1474 static int win_chr_init(CharDriverState *chr, const char *filename)
1475 {
1476     WinCharState *s = chr->opaque;
1477     COMMCONFIG comcfg;
1478     COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
1479     COMSTAT comstat;
1480     DWORD size;
1481     DWORD err;
1482 
1483     s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1484     if (!s->hsend) {
1485         fprintf(stderr, "Failed CreateEvent\n");
1486         goto fail;
1487     }
1488     s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1489     if (!s->hrecv) {
1490         fprintf(stderr, "Failed CreateEvent\n");
1491         goto fail;
1492     }
1493 
1494     s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL,
1495                       OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
1496     if (s->hcom == INVALID_HANDLE_VALUE) {
1497         fprintf(stderr, "Failed CreateFile (%lu)\n", GetLastError());
1498         s->hcom = NULL;
1499         goto fail;
1500     }
1501 
1502     if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) {
1503         fprintf(stderr, "Failed SetupComm\n");
1504         goto fail;
1505     }
1506 
1507     ZeroMemory(&comcfg, sizeof(COMMCONFIG));
1508     size = sizeof(COMMCONFIG);
1509     GetDefaultCommConfig(filename, &comcfg, &size);
1510     comcfg.dcb.DCBlength = sizeof(DCB);
1511     CommConfigDialog(filename, NULL, &comcfg);
1512 
1513     if (!SetCommState(s->hcom, &comcfg.dcb)) {
1514         fprintf(stderr, "Failed SetCommState\n");
1515         goto fail;
1516     }
1517 
1518     if (!SetCommMask(s->hcom, EV_ERR)) {
1519         fprintf(stderr, "Failed SetCommMask\n");
1520         goto fail;
1521     }
1522 
1523     cto.ReadIntervalTimeout = MAXDWORD;
1524     if (!SetCommTimeouts(s->hcom, &cto)) {
1525         fprintf(stderr, "Failed SetCommTimeouts\n");
1526         goto fail;
1527     }
1528 
1529     if (!ClearCommError(s->hcom, &err, &comstat)) {
1530         fprintf(stderr, "Failed ClearCommError\n");
1531         goto fail;
1532     }
1533     qemu_add_polling_cb(win_chr_poll, chr);
1534     return 0;
1535 
1536  fail:
1537     win_chr_close(chr);
1538     return -1;
1539 }
1540 
win_chr_write(CharDriverState * chr,const uint8_t * buf,int len1)1541 static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1)
1542 {
1543     WinCharState *s = chr->opaque;
1544     DWORD len, ret, size, err;
1545 
1546     len = len1;
1547     ZeroMemory(&s->osend, sizeof(s->osend));
1548     s->osend.hEvent = s->hsend;
1549     while (len > 0) {
1550         if (s->hsend)
1551             ret = WriteFile(s->hcom, buf, len, &size, &s->osend);
1552         else
1553             ret = WriteFile(s->hcom, buf, len, &size, NULL);
1554         if (!ret) {
1555             err = GetLastError();
1556             if (err == ERROR_IO_PENDING) {
1557                 ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE);
1558                 if (ret) {
1559                     buf += size;
1560                     len -= size;
1561                 } else {
1562                     break;
1563                 }
1564             } else {
1565                 break;
1566             }
1567         } else {
1568             buf += size;
1569             len -= size;
1570         }
1571     }
1572     return len1 - len;
1573 }
1574 
win_chr_read_poll(CharDriverState * chr)1575 static int win_chr_read_poll(CharDriverState *chr)
1576 {
1577     WinCharState *s = chr->opaque;
1578 
1579     s->max_size = qemu_chr_can_read(chr);
1580     return s->max_size;
1581 }
1582 
win_chr_readfile(CharDriverState * chr)1583 static void win_chr_readfile(CharDriverState *chr)
1584 {
1585     WinCharState *s = chr->opaque;
1586     int ret, err;
1587     uint8_t buf[READ_BUF_LEN];
1588     DWORD size;
1589 
1590     ZeroMemory(&s->orecv, sizeof(s->orecv));
1591     s->orecv.hEvent = s->hrecv;
1592     ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv);
1593     if (!ret) {
1594         err = GetLastError();
1595         if (err == ERROR_IO_PENDING) {
1596             ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE);
1597         }
1598     }
1599 
1600     if (size > 0) {
1601         qemu_chr_read(chr, buf, size);
1602     }
1603 }
1604 
win_chr_read(CharDriverState * chr)1605 static void win_chr_read(CharDriverState *chr)
1606 {
1607     WinCharState *s = chr->opaque;
1608 
1609     if (s->len > s->max_size)
1610         s->len = s->max_size;
1611     if (s->len == 0)
1612         return;
1613 
1614     win_chr_readfile(chr);
1615 }
1616 
win_chr_poll(void * opaque)1617 static int win_chr_poll(void *opaque)
1618 {
1619     CharDriverState *chr = opaque;
1620     WinCharState *s = chr->opaque;
1621     COMSTAT status;
1622     DWORD comerr;
1623 
1624     ClearCommError(s->hcom, &comerr, &status);
1625     if (status.cbInQue > 0) {
1626         s->len = status.cbInQue;
1627         win_chr_read_poll(chr);
1628         win_chr_read(chr);
1629         return 1;
1630     }
1631     return 0;
1632 }
1633 
qemu_chr_open_win(QemuOpts * opts)1634 static CharDriverState *qemu_chr_open_win(QemuOpts *opts)
1635 {
1636     const char *filename = qemu_opt_get(opts, "path");
1637     CharDriverState *chr;
1638     WinCharState *s;
1639 
1640     chr = qemu_mallocz(sizeof(CharDriverState));
1641     s = qemu_mallocz(sizeof(WinCharState));
1642     chr->opaque = s;
1643     chr->chr_write = win_chr_write;
1644     chr->chr_close = win_chr_close;
1645 
1646     if (win_chr_init(chr, filename) < 0) {
1647         free(s);
1648         free(chr);
1649         return NULL;
1650     }
1651     qemu_chr_generic_open(chr);
1652     return chr;
1653 }
1654 
win_chr_pipe_poll(void * opaque)1655 static int win_chr_pipe_poll(void *opaque)
1656 {
1657     CharDriverState *chr = opaque;
1658     WinCharState *s = chr->opaque;
1659     DWORD size;
1660 
1661     PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL);
1662     if (size > 0) {
1663         s->len = size;
1664         win_chr_read_poll(chr);
1665         win_chr_read(chr);
1666         return 1;
1667     }
1668     return 0;
1669 }
1670 
win_chr_pipe_init(CharDriverState * chr,const char * filename)1671 static int win_chr_pipe_init(CharDriverState *chr, const char *filename)
1672 {
1673     WinCharState *s = chr->opaque;
1674     OVERLAPPED ov;
1675     int ret;
1676     DWORD size;
1677     char openname[256];
1678 
1679     s->fpipe = TRUE;
1680 
1681     s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1682     if (!s->hsend) {
1683         fprintf(stderr, "Failed CreateEvent\n");
1684         goto fail;
1685     }
1686     s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1687     if (!s->hrecv) {
1688         fprintf(stderr, "Failed CreateEvent\n");
1689         goto fail;
1690     }
1691 
1692     snprintf(openname, sizeof(openname), "\\\\.\\pipe\\%s", filename);
1693     s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
1694                               PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
1695                               PIPE_WAIT,
1696                               MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
1697     if (s->hcom == INVALID_HANDLE_VALUE) {
1698         fprintf(stderr, "Failed CreateNamedPipe (%lu)\n", GetLastError());
1699         s->hcom = NULL;
1700         goto fail;
1701     }
1702 
1703     ZeroMemory(&ov, sizeof(ov));
1704     ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
1705     ret = ConnectNamedPipe(s->hcom, &ov);
1706     if (ret) {
1707         fprintf(stderr, "Failed ConnectNamedPipe\n");
1708         goto fail;
1709     }
1710 
1711     ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
1712     if (!ret) {
1713         fprintf(stderr, "Failed GetOverlappedResult\n");
1714         if (ov.hEvent) {
1715             CloseHandle(ov.hEvent);
1716             ov.hEvent = NULL;
1717         }
1718         goto fail;
1719     }
1720 
1721     if (ov.hEvent) {
1722         CloseHandle(ov.hEvent);
1723         ov.hEvent = NULL;
1724     }
1725     qemu_add_polling_cb(win_chr_pipe_poll, chr);
1726     return 0;
1727 
1728  fail:
1729     win_chr_close(chr);
1730     return -1;
1731 }
1732 
1733 
qemu_chr_open_win_pipe(QemuOpts * opts)1734 static CharDriverState *qemu_chr_open_win_pipe(QemuOpts *opts)
1735 {
1736     const char *filename = qemu_opt_get(opts, "path");
1737     CharDriverState *chr;
1738     WinCharState *s;
1739 
1740     chr = qemu_mallocz(sizeof(CharDriverState));
1741     s = qemu_mallocz(sizeof(WinCharState));
1742     chr->opaque = s;
1743     chr->chr_write = win_chr_write;
1744     chr->chr_close = win_chr_close;
1745 
1746     if (win_chr_pipe_init(chr, filename) < 0) {
1747         free(s);
1748         free(chr);
1749         return NULL;
1750     }
1751     qemu_chr_generic_open(chr);
1752     return chr;
1753 }
1754 
qemu_chr_open_win_file(HANDLE fd_out)1755 static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out)
1756 {
1757     CharDriverState *chr;
1758     WinCharState *s;
1759 
1760     chr = qemu_mallocz(sizeof(CharDriverState));
1761     s = qemu_mallocz(sizeof(WinCharState));
1762     s->hcom = fd_out;
1763     chr->opaque = s;
1764     chr->chr_write = win_chr_write;
1765     qemu_chr_generic_open(chr);
1766     return chr;
1767 }
1768 
qemu_chr_open_win_con(QemuOpts * opts)1769 static CharDriverState *qemu_chr_open_win_con(QemuOpts *opts)
1770 {
1771     return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE));
1772 }
1773 
qemu_chr_open_win_file_out(QemuOpts * opts)1774 static CharDriverState *qemu_chr_open_win_file_out(QemuOpts *opts)
1775 {
1776     const char *file_out = qemu_opt_get(opts, "path");
1777     HANDLE fd_out;
1778 
1779     fd_out = CreateFile(file_out, GENERIC_WRITE, FILE_SHARE_READ, NULL,
1780                         OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
1781     if (fd_out == INVALID_HANDLE_VALUE)
1782         return NULL;
1783 
1784     return qemu_chr_open_win_file(fd_out);
1785 }
1786 #endif /* !_WIN32 */
1787 
1788 /***********************************************************/
1789 /* UDP Net console */
1790 
1791 typedef struct {
1792     int fd;
1793     uint8_t buf[READ_BUF_LEN];
1794     int bufcnt;
1795     int bufptr;
1796     int max_size;
1797 } NetCharDriver;
1798 
udp_chr_write(CharDriverState * chr,const uint8_t * buf,int len)1799 static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1800 {
1801     NetCharDriver *s = chr->opaque;
1802 
1803     return send(s->fd, (const void *)buf, len, 0);
1804 }
1805 
udp_chr_read_poll(void * opaque)1806 static int udp_chr_read_poll(void *opaque)
1807 {
1808     CharDriverState *chr = opaque;
1809     NetCharDriver *s = chr->opaque;
1810 
1811     s->max_size = qemu_chr_can_read(chr);
1812 
1813     /* If there were any stray characters in the queue process them
1814      * first
1815      */
1816     while (s->max_size > 0 && s->bufptr < s->bufcnt) {
1817         qemu_chr_read(chr, &s->buf[s->bufptr], 1);
1818         s->bufptr++;
1819         s->max_size = qemu_chr_can_read(chr);
1820     }
1821     return s->max_size;
1822 }
1823 
udp_chr_read(void * opaque)1824 static void udp_chr_read(void *opaque)
1825 {
1826     CharDriverState *chr = opaque;
1827     NetCharDriver *s = chr->opaque;
1828 
1829     if (s->max_size == 0)
1830         return;
1831     s->bufcnt = recv(s->fd, (void *)s->buf, sizeof(s->buf), 0);
1832     s->bufptr = s->bufcnt;
1833     if (s->bufcnt <= 0)
1834         return;
1835 
1836     s->bufptr = 0;
1837     while (s->max_size > 0 && s->bufptr < s->bufcnt) {
1838         qemu_chr_read(chr, &s->buf[s->bufptr], 1);
1839         s->bufptr++;
1840         s->max_size = qemu_chr_can_read(chr);
1841     }
1842 }
1843 
udp_chr_update_read_handler(CharDriverState * chr)1844 static void udp_chr_update_read_handler(CharDriverState *chr)
1845 {
1846     NetCharDriver *s = chr->opaque;
1847 
1848     if (s->fd >= 0) {
1849         qemu_set_fd_handler2(s->fd, udp_chr_read_poll,
1850                              udp_chr_read, NULL, chr);
1851     }
1852 }
1853 
udp_chr_close(CharDriverState * chr)1854 static void udp_chr_close(CharDriverState *chr)
1855 {
1856     NetCharDriver *s = chr->opaque;
1857     if (s->fd >= 0) {
1858         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1859         closesocket(s->fd);
1860     }
1861     qemu_free(s);
1862     qemu_chr_event(chr, CHR_EVENT_CLOSED);
1863 }
1864 
qemu_chr_open_udp(QemuOpts * opts)1865 static CharDriverState *qemu_chr_open_udp(QemuOpts *opts)
1866 {
1867     CharDriverState *chr = NULL;
1868     NetCharDriver *s = NULL;
1869     int fd = -1;
1870 
1871     chr = qemu_mallocz(sizeof(CharDriverState));
1872     s = qemu_mallocz(sizeof(NetCharDriver));
1873 
1874     fd = inet_dgram_opts(opts);
1875     if (fd < 0) {
1876         fprintf(stderr, "inet_dgram_opts failed\n");
1877         goto return_err;
1878     }
1879 
1880     s->fd = fd;
1881     s->bufcnt = 0;
1882     s->bufptr = 0;
1883     chr->opaque = s;
1884     chr->chr_write = udp_chr_write;
1885     chr->chr_update_read_handler = udp_chr_update_read_handler;
1886     chr->chr_close = udp_chr_close;
1887     return chr;
1888 
1889 return_err:
1890     if (chr)
1891         free(chr);
1892     if (s)
1893         free(s);
1894     if (fd >= 0)
1895         closesocket(fd);
1896     return NULL;
1897 }
1898 
1899 /***********************************************************/
1900 /* TCP Net console */
1901 
1902 typedef struct {
1903     int fd, listen_fd;
1904     int connected;
1905     int max_size;
1906     int do_telnetopt;
1907     int do_nodelay;
1908     int is_unix;
1909     int msgfd;
1910 } TCPCharDriver;
1911 
1912 static void tcp_chr_accept(void *opaque);
1913 
tcp_chr_write(CharDriverState * chr,const uint8_t * buf,int len)1914 static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
1915 {
1916     TCPCharDriver *s = chr->opaque;
1917     if (s->connected) {
1918         return send_all(s->fd, buf, len);
1919     } else {
1920         /* XXX: indicate an error ? */
1921         return len;
1922     }
1923 }
1924 
tcp_chr_read_poll(void * opaque)1925 static int tcp_chr_read_poll(void *opaque)
1926 {
1927     CharDriverState *chr = opaque;
1928     TCPCharDriver *s = chr->opaque;
1929     if (!s->connected)
1930         return 0;
1931     s->max_size = qemu_chr_can_read(chr);
1932     return s->max_size;
1933 }
1934 
1935 #define IAC 255
1936 #define IAC_BREAK 243
tcp_chr_process_IAC_bytes(CharDriverState * chr,TCPCharDriver * s,uint8_t * buf,int * size)1937 static void tcp_chr_process_IAC_bytes(CharDriverState *chr,
1938                                       TCPCharDriver *s,
1939                                       uint8_t *buf, int *size)
1940 {
1941     /* Handle any telnet client's basic IAC options to satisfy char by
1942      * char mode with no echo.  All IAC options will be removed from
1943      * the buf and the do_telnetopt variable will be used to track the
1944      * state of the width of the IAC information.
1945      *
1946      * IAC commands come in sets of 3 bytes with the exception of the
1947      * "IAC BREAK" command and the double IAC.
1948      */
1949 
1950     int i;
1951     int j = 0;
1952 
1953     for (i = 0; i < *size; i++) {
1954         if (s->do_telnetopt > 1) {
1955             if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
1956                 /* Double IAC means send an IAC */
1957                 if (j != i)
1958                     buf[j] = buf[i];
1959                 j++;
1960                 s->do_telnetopt = 1;
1961             } else {
1962                 if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
1963                     /* Handle IAC break commands by sending a serial break */
1964                     qemu_chr_event(chr, CHR_EVENT_BREAK);
1965                     s->do_telnetopt++;
1966                 }
1967                 s->do_telnetopt++;
1968             }
1969             if (s->do_telnetopt >= 4) {
1970                 s->do_telnetopt = 1;
1971             }
1972         } else {
1973             if ((unsigned char)buf[i] == IAC) {
1974                 s->do_telnetopt = 2;
1975             } else {
1976                 if (j != i)
1977                     buf[j] = buf[i];
1978                 j++;
1979             }
1980         }
1981     }
1982     *size = j;
1983 }
1984 
tcp_get_msgfd(CharDriverState * chr)1985 static int tcp_get_msgfd(CharDriverState *chr)
1986 {
1987     TCPCharDriver *s = chr->opaque;
1988     int fd = s->msgfd;
1989     s->msgfd = -1;
1990     return fd;
1991 }
1992 
1993 #ifndef _WIN32
unix_process_msgfd(CharDriverState * chr,struct msghdr * msg)1994 static void unix_process_msgfd(CharDriverState *chr, struct msghdr *msg)
1995 {
1996     TCPCharDriver *s = chr->opaque;
1997     struct cmsghdr *cmsg;
1998 
1999     for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
2000         int fd;
2001 
2002         if (cmsg->cmsg_len != CMSG_LEN(sizeof(int)) ||
2003             cmsg->cmsg_level != SOL_SOCKET ||
2004             cmsg->cmsg_type != SCM_RIGHTS)
2005             continue;
2006 
2007         fd = *((int *)CMSG_DATA(cmsg));
2008         if (fd < 0)
2009             continue;
2010 
2011         if (s->msgfd != -1)
2012             close(s->msgfd);
2013         s->msgfd = fd;
2014     }
2015 }
2016 
tcp_chr_recv(CharDriverState * chr,char * buf,size_t len)2017 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2018 {
2019     TCPCharDriver *s = chr->opaque;
2020     struct msghdr msg = { NULL, };
2021     struct iovec iov[1];
2022     union {
2023         struct cmsghdr cmsg;
2024         char control[CMSG_SPACE(sizeof(int))];
2025     } msg_control;
2026     ssize_t ret;
2027 
2028     iov[0].iov_base = buf;
2029     iov[0].iov_len = len;
2030 
2031     msg.msg_iov = iov;
2032     msg.msg_iovlen = 1;
2033     msg.msg_control = &msg_control;
2034     msg.msg_controllen = sizeof(msg_control);
2035 
2036     ret = recvmsg(s->fd, &msg, 0);
2037     if (ret > 0 && s->is_unix)
2038         unix_process_msgfd(chr, &msg);
2039 
2040     return ret;
2041 }
2042 #else
tcp_chr_recv(CharDriverState * chr,char * buf,size_t len)2043 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2044 {
2045     TCPCharDriver *s = chr->opaque;
2046     return recv(s->fd, buf, len, 0);
2047 }
2048 #endif
2049 
tcp_chr_read(void * opaque)2050 static void tcp_chr_read(void *opaque)
2051 {
2052     CharDriverState *chr = opaque;
2053     TCPCharDriver *s = chr->opaque;
2054     uint8_t buf[READ_BUF_LEN];
2055     int len, size;
2056 
2057     if (!s->connected || s->max_size <= 0)
2058         return;
2059     len = sizeof(buf);
2060     if (len > s->max_size)
2061         len = s->max_size;
2062     size = tcp_chr_recv(chr, (void *)buf, len);
2063     if (size == 0) {
2064         /* connection closed */
2065         s->connected = 0;
2066         if (s->listen_fd >= 0) {
2067             qemu_set_fd_handler(s->listen_fd, tcp_chr_accept, NULL, chr);
2068         }
2069         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
2070         closesocket(s->fd);
2071         s->fd = -1;
2072         qemu_chr_event(chr, CHR_EVENT_CLOSED);
2073     } else if (size > 0) {
2074         if (s->do_telnetopt)
2075             tcp_chr_process_IAC_bytes(chr, s, buf, &size);
2076         if (size > 0)
2077             qemu_chr_read(chr, buf, size);
2078     }
2079 }
2080 
2081 #ifndef _WIN32
qemu_chr_open_eventfd(int eventfd)2082 CharDriverState *qemu_chr_open_eventfd(int eventfd)
2083 {
2084     return qemu_chr_open_fd(eventfd, eventfd);
2085 }
2086 #endif
2087 
tcp_chr_connect(void * opaque)2088 static void tcp_chr_connect(void *opaque)
2089 {
2090     CharDriverState *chr = opaque;
2091     TCPCharDriver *s = chr->opaque;
2092 
2093     s->connected = 1;
2094     qemu_set_fd_handler2(s->fd, tcp_chr_read_poll,
2095                          tcp_chr_read, NULL, chr);
2096     qemu_chr_generic_open(chr);
2097 }
2098 
2099 #define IACSET(x,a,b,c) x[0] = a; x[1] = b; x[2] = c;
tcp_chr_telnet_init(int fd)2100 static void tcp_chr_telnet_init(int fd)
2101 {
2102     char buf[3];
2103     /* Send the telnet negotion to put telnet in binary, no echo, single char mode */
2104     IACSET(buf, 0xff, 0xfb, 0x01);  /* IAC WILL ECHO */
2105     send(fd, (char *)buf, 3, 0);
2106     IACSET(buf, 0xff, 0xfb, 0x03);  /* IAC WILL Suppress go ahead */
2107     send(fd, (char *)buf, 3, 0);
2108     IACSET(buf, 0xff, 0xfb, 0x00);  /* IAC WILL Binary */
2109     send(fd, (char *)buf, 3, 0);
2110     IACSET(buf, 0xff, 0xfd, 0x00);  /* IAC DO Binary */
2111     send(fd, (char *)buf, 3, 0);
2112 }
2113 
socket_set_nodelay(int fd)2114 static void socket_set_nodelay(int fd)
2115 {
2116     int val = 1;
2117     setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *)&val, sizeof(val));
2118 }
2119 
tcp_chr_accept(void * opaque)2120 static void tcp_chr_accept(void *opaque)
2121 {
2122     CharDriverState *chr = opaque;
2123     TCPCharDriver *s = chr->opaque;
2124     struct sockaddr_in saddr;
2125 #ifndef _WIN32
2126     struct sockaddr_un uaddr;
2127 #endif
2128     struct sockaddr *addr;
2129     socklen_t len;
2130     int fd;
2131 
2132     for(;;) {
2133 #ifndef _WIN32
2134 	if (s->is_unix) {
2135 	    len = sizeof(uaddr);
2136 	    addr = (struct sockaddr *)&uaddr;
2137 	} else
2138 #endif
2139 	{
2140 	    len = sizeof(saddr);
2141 	    addr = (struct sockaddr *)&saddr;
2142 	}
2143         fd = qemu_accept(s->listen_fd, addr, &len);
2144         if (fd < 0 && errno != EINTR) {
2145             return;
2146         } else if (fd >= 0) {
2147             if (s->do_telnetopt)
2148                 tcp_chr_telnet_init(fd);
2149             break;
2150         }
2151     }
2152     socket_set_nonblock(fd);
2153     if (s->do_nodelay)
2154         socket_set_nodelay(fd);
2155     s->fd = fd;
2156     qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL);
2157     tcp_chr_connect(chr);
2158 }
2159 
tcp_chr_close(CharDriverState * chr)2160 static void tcp_chr_close(CharDriverState *chr)
2161 {
2162     TCPCharDriver *s = chr->opaque;
2163     if (s->fd >= 0) {
2164         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
2165         closesocket(s->fd);
2166     }
2167     if (s->listen_fd >= 0) {
2168         qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL);
2169         closesocket(s->listen_fd);
2170     }
2171     qemu_free(s);
2172     qemu_chr_event(chr, CHR_EVENT_CLOSED);
2173 }
2174 
qemu_chr_open_socket(QemuOpts * opts)2175 static CharDriverState *qemu_chr_open_socket(QemuOpts *opts)
2176 {
2177     CharDriverState *chr = NULL;
2178     TCPCharDriver *s = NULL;
2179     int fd = -1;
2180     int is_listen;
2181     int is_waitconnect;
2182     int do_nodelay;
2183     int is_unix;
2184     int is_telnet;
2185 
2186     is_listen      = qemu_opt_get_bool(opts, "server", 0);
2187     is_waitconnect = qemu_opt_get_bool(opts, "wait", 1);
2188     is_telnet      = qemu_opt_get_bool(opts, "telnet", 0);
2189     do_nodelay     = !qemu_opt_get_bool(opts, "delay", 1);
2190     is_unix        = qemu_opt_get(opts, "path") != NULL;
2191     if (!is_listen)
2192         is_waitconnect = 0;
2193 
2194     chr = qemu_mallocz(sizeof(CharDriverState));
2195     s = qemu_mallocz(sizeof(TCPCharDriver));
2196 
2197     if (is_unix) {
2198         if (is_listen) {
2199             fd = unix_listen_opts(opts);
2200         } else {
2201             fd = unix_connect_opts(opts);
2202         }
2203     } else {
2204         if (is_listen) {
2205             fd = inet_listen_opts(opts, 0);
2206         } else {
2207             fd = inet_connect_opts(opts);
2208         }
2209     }
2210     if (fd < 0)
2211         goto fail;
2212 
2213     if (!is_waitconnect)
2214         socket_set_nonblock(fd);
2215 
2216     s->connected = 0;
2217     s->fd = -1;
2218     s->listen_fd = -1;
2219     s->msgfd = -1;
2220     s->is_unix = is_unix;
2221     s->do_nodelay = do_nodelay && !is_unix;
2222 
2223     chr->opaque = s;
2224     chr->chr_write = tcp_chr_write;
2225     chr->chr_close = tcp_chr_close;
2226     chr->get_msgfd = tcp_get_msgfd;
2227 
2228     if (is_listen) {
2229         s->listen_fd = fd;
2230         qemu_set_fd_handler(s->listen_fd, tcp_chr_accept, NULL, chr);
2231         if (is_telnet)
2232             s->do_telnetopt = 1;
2233 
2234     } else {
2235         s->connected = 1;
2236         s->fd = fd;
2237         socket_set_nodelay(fd);
2238         tcp_chr_connect(chr);
2239     }
2240 
2241     /* for "info chardev" monitor command */
2242     chr->filename = qemu_malloc(256);
2243     if (is_unix) {
2244         snprintf(chr->filename, 256, "unix:%s%s",
2245                  qemu_opt_get(opts, "path"),
2246                  qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2247     } else if (is_telnet) {
2248         snprintf(chr->filename, 256, "telnet:%s:%s%s",
2249                  qemu_opt_get(opts, "host"), qemu_opt_get(opts, "port"),
2250                  qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2251     } else {
2252         snprintf(chr->filename, 256, "tcp:%s:%s%s",
2253                  qemu_opt_get(opts, "host"), qemu_opt_get(opts, "port"),
2254                  qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2255     }
2256 
2257     if (is_listen && is_waitconnect) {
2258         printf("QEMU waiting for connection on: %s\n",
2259                chr->filename);
2260         tcp_chr_accept(chr);
2261         socket_set_nonblock(s->listen_fd);
2262     }
2263     return chr;
2264 
2265  fail:
2266     if (fd >= 0)
2267         closesocket(fd);
2268     qemu_free(s);
2269     qemu_free(chr);
2270     return NULL;
2271 }
2272 
2273 /***********************************************************/
2274 /* Memory chardev */
2275 typedef struct {
2276     size_t outbuf_size;
2277     size_t outbuf_capacity;
2278     uint8_t *outbuf;
2279 } MemoryDriver;
2280 
mem_chr_write(CharDriverState * chr,const uint8_t * buf,int len)2281 static int mem_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2282 {
2283     MemoryDriver *d = chr->opaque;
2284 
2285     /* TODO: the QString implementation has the same code, we should
2286      * introduce a generic way to do this in cutils.c */
2287     if (d->outbuf_capacity < d->outbuf_size + len) {
2288         /* grow outbuf */
2289         d->outbuf_capacity += len;
2290         d->outbuf_capacity *= 2;
2291         d->outbuf = qemu_realloc(d->outbuf, d->outbuf_capacity);
2292     }
2293 
2294     memcpy(d->outbuf + d->outbuf_size, buf, len);
2295     d->outbuf_size += len;
2296 
2297     return len;
2298 }
2299 
qemu_chr_init_mem(CharDriverState * chr)2300 void qemu_chr_init_mem(CharDriverState *chr)
2301 {
2302     MemoryDriver *d;
2303 
2304     d = qemu_malloc(sizeof(*d));
2305     d->outbuf_size = 0;
2306     d->outbuf_capacity = 4096;
2307     d->outbuf = qemu_mallocz(d->outbuf_capacity);
2308 
2309     memset(chr, 0, sizeof(*chr));
2310     chr->opaque = d;
2311     chr->chr_write = mem_chr_write;
2312 }
2313 
qemu_chr_mem_to_qs(CharDriverState * chr)2314 QString *qemu_chr_mem_to_qs(CharDriverState *chr)
2315 {
2316     MemoryDriver *d = chr->opaque;
2317     return qstring_from_substr((char *) d->outbuf, 0, d->outbuf_size - 1);
2318 }
2319 
2320 /* NOTE: this driver can not be closed with qemu_chr_close()! */
qemu_chr_close_mem(CharDriverState * chr)2321 void qemu_chr_close_mem(CharDriverState *chr)
2322 {
2323     MemoryDriver *d = chr->opaque;
2324 
2325     qemu_free(d->outbuf);
2326     qemu_free(chr->opaque);
2327     chr->opaque = NULL;
2328     chr->chr_write = NULL;
2329 }
2330 
qemu_chr_mem_osize(const CharDriverState * chr)2331 size_t qemu_chr_mem_osize(const CharDriverState *chr)
2332 {
2333     const MemoryDriver *d = chr->opaque;
2334     return d->outbuf_size;
2335 }
2336 
qemu_chr_parse_compat(const char * label,const char * filename)2337 QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
2338 {
2339     char host[65], port[33], width[8], height[8];
2340     int pos;
2341     const char *p;
2342     QemuOpts *opts;
2343 
2344     opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1);
2345     if (NULL == opts)
2346         return NULL;
2347 
2348     if (strstart(filename, "mon:", &p)) {
2349         filename = p;
2350         qemu_opt_set(opts, "mux", "on");
2351     }
2352 
2353     if (strcmp(filename, "null")    == 0 ||
2354         strcmp(filename, "pty")     == 0 ||
2355         strcmp(filename, "msmouse") == 0 ||
2356         strcmp(filename, "braille") == 0 ||
2357         strcmp(filename, "stdio")   == 0) {
2358         qemu_opt_set(opts, "backend", filename);
2359         return opts;
2360     }
2361     if (strstart(filename, "vc", &p)) {
2362         qemu_opt_set(opts, "backend", "vc");
2363         if (*p == ':') {
2364             if (sscanf(p+1, "%8[0-9]x%8[0-9]", width, height) == 2) {
2365                 /* pixels */
2366                 qemu_opt_set(opts, "width", width);
2367                 qemu_opt_set(opts, "height", height);
2368             } else if (sscanf(p+1, "%8[0-9]Cx%8[0-9]C", width, height) == 2) {
2369                 /* chars */
2370                 qemu_opt_set(opts, "cols", width);
2371                 qemu_opt_set(opts, "rows", height);
2372             } else {
2373                 goto fail;
2374             }
2375         }
2376         return opts;
2377     }
2378     if (strcmp(filename, "con:") == 0) {
2379         qemu_opt_set(opts, "backend", "console");
2380         return opts;
2381     }
2382     if (strstart(filename, "COM", NULL)) {
2383         qemu_opt_set(opts, "backend", "serial");
2384         qemu_opt_set(opts, "path", filename);
2385         return opts;
2386     }
2387     if (strstart(filename, "file:", &p)) {
2388         qemu_opt_set(opts, "backend", "file");
2389         qemu_opt_set(opts, "path", p);
2390         return opts;
2391     }
2392     if (strstart(filename, "pipe:", &p)) {
2393         qemu_opt_set(opts, "backend", "pipe");
2394         qemu_opt_set(opts, "path", p);
2395         return opts;
2396     }
2397     if (strstart(filename, "tcp:", &p) ||
2398         strstart(filename, "telnet:", &p)) {
2399         if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
2400             host[0] = 0;
2401             if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
2402                 goto fail;
2403         }
2404         qemu_opt_set(opts, "backend", "socket");
2405         qemu_opt_set(opts, "host", host);
2406         qemu_opt_set(opts, "port", port);
2407         if (p[pos] == ',') {
2408             if (qemu_opts_do_parse(opts, p+pos+1, NULL) != 0)
2409                 goto fail;
2410         }
2411         if (strstart(filename, "telnet:", &p))
2412             qemu_opt_set(opts, "telnet", "on");
2413         return opts;
2414     }
2415     if (strstart(filename, "udp:", &p)) {
2416         qemu_opt_set(opts, "backend", "udp");
2417         if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
2418             host[0] = 0;
2419             if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
2420                 goto fail;
2421             }
2422         }
2423         qemu_opt_set(opts, "host", host);
2424         qemu_opt_set(opts, "port", port);
2425         if (p[pos] == '@') {
2426             p += pos + 1;
2427             if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
2428                 host[0] = 0;
2429                 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) {
2430                     goto fail;
2431                 }
2432             }
2433             qemu_opt_set(opts, "localaddr", host);
2434             qemu_opt_set(opts, "localport", port);
2435         }
2436         return opts;
2437     }
2438     if (strstart(filename, "unix:", &p)) {
2439         qemu_opt_set(opts, "backend", "socket");
2440         if (qemu_opts_do_parse(opts, p, "path") != 0)
2441             goto fail;
2442         return opts;
2443     }
2444     if (strstart(filename, "/dev/parport", NULL) ||
2445         strstart(filename, "/dev/ppi", NULL)) {
2446         qemu_opt_set(opts, "backend", "parport");
2447         qemu_opt_set(opts, "path", filename);
2448         return opts;
2449     }
2450     if (strstart(filename, "/dev/", NULL)) {
2451         qemu_opt_set(opts, "backend", "tty");
2452         qemu_opt_set(opts, "path", filename);
2453         return opts;
2454     }
2455 
2456 fail:
2457     qemu_opts_del(opts);
2458     return NULL;
2459 }
2460 
2461 static const struct {
2462     const char *name;
2463     CharDriverState *(*open)(QemuOpts *opts);
2464 } backend_table[] = {
2465     { .name = "null",      .open = qemu_chr_open_null },
2466     { .name = "socket",    .open = qemu_chr_open_socket },
2467     { .name = "udp",       .open = qemu_chr_open_udp },
2468     { .name = "msmouse",   .open = qemu_chr_open_msmouse },
2469     { .name = "vc",        .open = text_console_init },
2470 #ifdef _WIN32
2471     { .name = "file",      .open = qemu_chr_open_win_file_out },
2472     { .name = "pipe",      .open = qemu_chr_open_win_pipe },
2473     { .name = "console",   .open = qemu_chr_open_win_con },
2474     { .name = "serial",    .open = qemu_chr_open_win },
2475 #else
2476     { .name = "file",      .open = qemu_chr_open_file_out },
2477     { .name = "pipe",      .open = qemu_chr_open_pipe },
2478     { .name = "pty",       .open = qemu_chr_open_pty },
2479     { .name = "stdio",     .open = qemu_chr_open_stdio },
2480 #endif
2481 #ifdef CONFIG_BRLAPI
2482     { .name = "braille",   .open = chr_baum_init },
2483 #endif
2484 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
2485     || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
2486     || defined(__FreeBSD_kernel__)
2487     { .name = "tty",       .open = qemu_chr_open_tty },
2488 #endif
2489 #if defined(__linux__) || defined(__FreeBSD__) || defined(__DragonFly__) \
2490     || defined(__FreeBSD_kernel__)
2491     { .name = "parport",   .open = qemu_chr_open_pp },
2492 #endif
2493 #ifdef CONFIG_SPICE
2494     { .name = "spicevmc",     .open = qemu_chr_open_spice },
2495 #endif
2496 };
2497 
qemu_chr_open_opts(QemuOpts * opts,void (* init)(struct CharDriverState * s))2498 CharDriverState *qemu_chr_open_opts(QemuOpts *opts,
2499                                     void (*init)(struct CharDriverState *s))
2500 {
2501     CharDriverState *chr;
2502     int i;
2503 
2504     if (qemu_opts_id(opts) == NULL) {
2505         fprintf(stderr, "chardev: no id specified\n");
2506         return NULL;
2507     }
2508 
2509     if (qemu_opt_get(opts, "backend") == NULL) {
2510         fprintf(stderr, "chardev: \"%s\" missing backend\n",
2511                 qemu_opts_id(opts));
2512         return NULL;
2513     }
2514     for (i = 0; i < ARRAY_SIZE(backend_table); i++) {
2515         if (strcmp(backend_table[i].name, qemu_opt_get(opts, "backend")) == 0)
2516             break;
2517     }
2518     if (i == ARRAY_SIZE(backend_table)) {
2519         fprintf(stderr, "chardev: backend \"%s\" not found\n",
2520                 qemu_opt_get(opts, "backend"));
2521         return NULL;
2522     }
2523 
2524     chr = backend_table[i].open(opts);
2525     if (!chr) {
2526         fprintf(stderr, "chardev: opening backend \"%s\" failed\n",
2527                 qemu_opt_get(opts, "backend"));
2528         return NULL;
2529     }
2530 
2531     if (!chr->filename)
2532         chr->filename = qemu_strdup(qemu_opt_get(opts, "backend"));
2533     chr->init = init;
2534     QTAILQ_INSERT_TAIL(&chardevs, chr, next);
2535 
2536     if (qemu_opt_get_bool(opts, "mux", 0)) {
2537         CharDriverState *base = chr;
2538         int len = strlen(qemu_opts_id(opts)) + 6;
2539         base->label = qemu_malloc(len);
2540         snprintf(base->label, len, "%s-base", qemu_opts_id(opts));
2541         chr = qemu_chr_open_mux(base);
2542         chr->filename = base->filename;
2543         QTAILQ_INSERT_TAIL(&chardevs, chr, next);
2544     }
2545     chr->label = qemu_strdup(qemu_opts_id(opts));
2546     return chr;
2547 }
2548 
qemu_chr_open(const char * label,const char * filename,void (* init)(struct CharDriverState * s))2549 CharDriverState *qemu_chr_open(const char *label, const char *filename, void (*init)(struct CharDriverState *s))
2550 {
2551     const char *p;
2552     CharDriverState *chr;
2553     QemuOpts *opts;
2554 
2555     if (strstart(filename, "chardev:", &p)) {
2556         return qemu_chr_find(p);
2557     }
2558 
2559     opts = qemu_chr_parse_compat(label, filename);
2560     if (!opts)
2561         return NULL;
2562 
2563     chr = qemu_chr_open_opts(opts, init);
2564     if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
2565         monitor_init(chr, MONITOR_USE_READLINE);
2566     }
2567     qemu_opts_del(opts);
2568     return chr;
2569 }
2570 
qemu_chr_set_echo(struct CharDriverState * chr,bool echo)2571 void qemu_chr_set_echo(struct CharDriverState *chr, bool echo)
2572 {
2573     if (chr->chr_set_echo) {
2574         chr->chr_set_echo(chr, echo);
2575     }
2576 }
2577 
qemu_chr_close(CharDriverState * chr)2578 void qemu_chr_close(CharDriverState *chr)
2579 {
2580     QTAILQ_REMOVE(&chardevs, chr, next);
2581     if (chr->chr_close)
2582         chr->chr_close(chr);
2583     qemu_free(chr->filename);
2584     qemu_free(chr->label);
2585     qemu_free(chr);
2586 }
2587 
qemu_chr_qlist_iter(QObject * obj,void * opaque)2588 static void qemu_chr_qlist_iter(QObject *obj, void *opaque)
2589 {
2590     QDict *chr_dict;
2591     Monitor *mon = opaque;
2592 
2593     chr_dict = qobject_to_qdict(obj);
2594     monitor_printf(mon, "%s: filename=%s\n", qdict_get_str(chr_dict, "label"),
2595                                          qdict_get_str(chr_dict, "filename"));
2596 }
2597 
qemu_chr_info_print(Monitor * mon,const QObject * ret_data)2598 void qemu_chr_info_print(Monitor *mon, const QObject *ret_data)
2599 {
2600     qlist_iter(qobject_to_qlist(ret_data), qemu_chr_qlist_iter, mon);
2601 }
2602 
qemu_chr_info(Monitor * mon,QObject ** ret_data)2603 void qemu_chr_info(Monitor *mon, QObject **ret_data)
2604 {
2605     QList *chr_list;
2606     CharDriverState *chr;
2607 
2608     chr_list = qlist_new();
2609 
2610     QTAILQ_FOREACH(chr, &chardevs, next) {
2611         QObject *obj = qobject_from_jsonf("{ 'label': %s, 'filename': %s }",
2612                                           chr->label, chr->filename);
2613         qlist_append_obj(chr_list, obj);
2614     }
2615 
2616     *ret_data = QOBJECT(chr_list);
2617 }
2618 
qemu_chr_find(const char * name)2619 CharDriverState *qemu_chr_find(const char *name)
2620 {
2621     CharDriverState *chr;
2622 
2623     QTAILQ_FOREACH(chr, &chardevs, next) {
2624         if (strcmp(chr->label, name) != 0)
2625             continue;
2626         return chr;
2627     }
2628     return NULL;
2629 }
2630