/[dynamips]/upstream/dynamips-0.2.6-RC1/dev_vtty.c
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Annotation of /upstream/dynamips-0.2.6-RC1/dev_vtty.c

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Revision 2 - (hide annotations)
Sat Oct 6 16:03:58 2007 UTC (13 years ago) by dpavlin
File MIME type: text/plain
File size: 26451 byte(s)
import dynamips-0.2.6-RC1

1 dpavlin 1 /*
2     * Cisco 7200 (Predator) simulation platform.
3     * Copyright (c) 2005,2006 Christophe Fillot (cf@utc.fr)
4     *
5     * Virtual console TTY.
6     *
7     * "Interactive" part idea by Mtve.
8     * TCP console added by Mtve.
9     * Serial console by Peter Ross (suxen_drol@hotmail.com)
10     */
11    
12     /* By default, Cygwin supports only 64 FDs with select()! */
13     #ifdef __CYGWIN__
14     #define FD_SETSIZE 1024
15     #endif
16    
17     #include <stdio.h>
18     #include <stdlib.h>
19     #include <string.h>
20     #include <unistd.h>
21     #include <sys/types.h>
22     #include <sys/socket.h>
23     #include <termios.h>
24     #include <fcntl.h>
25     #include <errno.h>
26     #include <assert.h>
27    
28     #include <arpa/telnet.h>
29    
30     #include "mips64.h"
31     #include "cp0.h"
32     #include "cpu.h"
33     #include "dynamips.h"
34     #include "mips64_exec.h"
35     #include "device.h"
36     #include "memory.h"
37     #include "dev_c7200.h"
38     #include "dev_c3600.h"
39     #include "dev_vtty.h"
40     #include "vm.h"
41     #include "utils.h"
42    
43     /* VTTY list */
44     static pthread_mutex_t vtty_list_mutex = PTHREAD_MUTEX_INITIALIZER;
45     static vtty_t *vtty_list = NULL;
46     static pthread_t vtty_thread;
47    
48     #define VTTY_LIST_LOCK() pthread_mutex_lock(&vtty_list_mutex);
49     #define VTTY_LIST_UNLOCK() pthread_mutex_unlock(&vtty_list_mutex);
50    
51     static struct termios tios,tios_orig;
52    
53     /* Send Telnet command: WILL TELOPT_ECHO */
54     static void vtty_telnet_will_echo(vtty_t *vtty)
55     {
56     u_char cmd[] = { IAC, WILL, TELOPT_ECHO };
57     write(vtty->fd,cmd,sizeof(cmd));
58     }
59    
60     /* Send Telnet command: Suppress Go-Ahead */
61     static void vtty_telnet_will_suppress_go_ahead(vtty_t *vtty)
62     {
63     u_char cmd[] = { IAC, WILL, TELOPT_SGA };
64     write(vtty->fd,cmd,sizeof(cmd));
65     }
66    
67     /* Send Telnet command: Don't use linemode */
68     static void vtty_telnet_dont_linemode(vtty_t *vtty)
69     {
70     u_char cmd[] = { IAC, DONT, TELOPT_LINEMODE };
71     write(vtty->fd,cmd,sizeof(cmd));
72     }
73    
74     /* Send Telnet command: does the client support terminal type message? */
75     static void vtty_telnet_do_ttype(vtty_t *vtty)
76     {
77     u_char cmd[] = { IAC, DO, TELOPT_TTYPE };
78     write(vtty->fd,cmd,sizeof(cmd));
79     }
80    
81     /* Restore TTY original settings */
82     static void vtty_term_reset(void)
83     {
84     tcsetattr(STDIN_FILENO,TCSANOW,&tios_orig);
85     }
86    
87     /* Initialize real TTY */
88     static void vtty_term_init(void)
89     {
90     tcgetattr(STDIN_FILENO,&tios);
91    
92     memcpy(&tios_orig,&tios,sizeof(struct termios));
93     atexit(vtty_term_reset);
94    
95     tios.c_cc[VTIME] = 0;
96     tios.c_cc[VMIN] = 1;
97    
98     /* Disable Ctrl-C, Ctrl-S, Ctrl-Q and Ctrl-Z */
99     tios.c_cc[VINTR] = 0;
100     tios.c_cc[VSTART] = 0;
101     tios.c_cc[VSTOP] = 0;
102     tios.c_cc[VSUSP] = 0;
103    
104     tios.c_lflag &= ~(ICANON|ECHO);
105     tios.c_iflag &= ~ICRNL;
106     tcsetattr(STDIN_FILENO, TCSANOW, &tios);
107     tcflush(STDIN_FILENO,TCIFLUSH);
108     }
109    
110     /* Wait for a TCP connection */
111     static int vtty_tcp_conn_wait(vtty_t *vtty)
112     {
113     struct sockaddr_in serv;
114     int one = 1;
115    
116     vtty->state = VTTY_STATE_TCP_INVALID;
117    
118     if ((vtty->accept_fd = socket(PF_INET,SOCK_STREAM,0)) < 0) {
119     perror("vtty_tcp_waitcon: socket");
120     return(-1);
121     }
122    
123     if (setsockopt(vtty->accept_fd,SOL_SOCKET,SO_REUSEADDR,
124     &one,sizeof(one)) < 0)
125     {
126     perror("vtty_tcp_waitcon: setsockopt(SO_REUSEADDR)");
127     goto error;
128     }
129    
130     memset(&serv,0,sizeof(serv));
131     serv.sin_family = AF_INET;
132     serv.sin_addr.s_addr = htonl(INADDR_ANY);
133     serv.sin_port = htons(vtty->tcp_port);
134    
135     if (bind(vtty->accept_fd,(struct sockaddr *)&serv,sizeof(serv)) < 0) {
136     perror("vtty_tcp_waitcon: bind");
137     goto error;
138     }
139    
140     if (listen(vtty->accept_fd,1) < 0) {
141     perror("vtty_tcp_waitcon: listen");
142     goto error;
143     }
144    
145     vm_log(vtty->vm,"VTTY","%s: waiting connection on tcp port %d (FD %d)\n",
146     vtty->name,vtty->tcp_port,vtty->accept_fd);
147    
148     vtty->select_fd = &vtty->accept_fd;
149     vtty->state = VTTY_STATE_TCP_WAITING;
150     return(0);
151    
152     error:
153     close(vtty->accept_fd);
154     vtty->accept_fd = -1;
155     vtty->select_fd = NULL;
156     return(-1);
157     }
158    
159     /* Accept a TCP connection */
160     static int vtty_tcp_conn_accept(vtty_t *vtty)
161     {
162     if ((vtty->fd = accept(vtty->accept_fd,NULL,NULL)) < 0) {
163     fprintf(stderr,"vtty_tcp_conn_accept: accept on port %d failed %s\n",
164     vtty->tcp_port,strerror(errno));
165     return(-1);
166     }
167    
168     vm_log(vtty->vm,"VTTY","%s is now connected (accept_fd=%d,conn_fd=%d)\n",
169     vtty->name,vtty->accept_fd,vtty->fd);
170    
171     /* Adapt Telnet settings */
172     if (vtty->terminal_support) {
173     vtty_telnet_do_ttype(vtty);
174     vtty_telnet_will_echo(vtty);
175     vtty_telnet_will_suppress_go_ahead(vtty);
176     vtty_telnet_dont_linemode(vtty);
177     vtty->input_state = VTTY_INPUT_TELNET;
178     }
179    
180     if (!(vtty->fstream = fdopen(vtty->fd, "wb"))) {
181     close(vtty->fd);
182     vtty->fd = -1;
183     return(-1);
184     }
185    
186     fprintf(vtty->fstream,
187     "Connected to Dynamips VM \"%s\" (ID %u, type %s) - %s\r\n\r\n",
188     vtty->vm->name, vtty->vm->instance_id, vm_get_type(vtty->vm),
189     vtty->name);
190    
191     vtty->select_fd = &vtty->fd;
192     vtty->state = VTTY_STATE_TCP_RUNNING;
193     return(0);
194     }
195    
196     /*
197     * Parse serial interface descriptor string, return 0 if success
198     * string takes the form "device:baudrate:databits:parity:stopbits:hwflow"
199     * device is mandatory, other options are optional (default=9600,8,N,1,0).
200     */
201     int vtty_parse_serial_option(vtty_serial_option_t *option, char *optarg)
202     {
203     char *array[6];
204     int count;
205    
206     if ((count = m_strtok(optarg, ':', array, 6)) < 1) {
207     fprintf(stderr,"vtty_parse_serial_option: invalid string\n");
208     return(-1);
209     }
210    
211     if (!(option->device = strdup(array[0]))) {
212     fprintf(stderr,"vtty_parse_serial_option: unable to copy string\n");
213     return(-1);
214     }
215    
216     option->baudrate = (count>1) ? atoi(array[1]) : 9600;
217     option->databits = (count>2) ? atoi(array[2]) : 8;
218    
219     if (count > 3) {
220     switch(*array[3]) {
221     case 'o':
222     case 'O':
223     option->parity = 1; /* odd */
224     case 'e':
225     case 'E':
226     option->parity = 2; /* even */
227     default:
228     option->parity = 0; /* none */
229     }
230     } else {
231     option->parity = 0;
232     }
233    
234     option->stopbits = (count>4) ? atoi(array[4]) : 1;
235     option->hwflow = (count>5) ? atoi(array[5]) : 0;
236     return(0);
237     }
238    
239     #if defined(__CYGWIN__)
240     void cfmakeraw(struct termios *termios_p) {
241     termios_p->c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|
242     INLCR|IGNCR|ICRNL|IXON);
243     termios_p->c_oflag &= ~OPOST;
244     termios_p->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
245     termios_p->c_cflag &= ~(CSIZE|PARENB);
246     termios_p->c_cflag |= CS8;
247     }
248     #endif
249    
250     /*
251     * Setup serial port, return 0 if success.
252     */
253     static int vtty_serial_setup(vtty_t *vtty, const vtty_serial_option_t *option)
254     {
255     struct termios tio;
256     int tio_baudrate;
257    
258     if (tcgetattr(vtty->fd, &tio) != 0) {
259     fprintf(stderr, "error: tcgetattr failed\n");
260     return(-1);
261     }
262    
263     cfmakeraw(&tio);
264    
265     tio.c_cflag = 0
266     |CLOCAL // ignore modem control lines
267     ;
268    
269     tio.c_cflag &= ~CREAD;
270     tio.c_cflag |= CREAD;
271    
272     switch(option->baudrate) {
273     case 50 : tio_baudrate = B50; break;
274     case 75 : tio_baudrate = B75; break;
275     case 110 : tio_baudrate = B110; break;
276     case 134 : tio_baudrate = B134; break;
277     case 150 : tio_baudrate = B150; break;
278     case 200 : tio_baudrate = B200; break;
279     case 300 : tio_baudrate = B300; break;
280     case 600 : tio_baudrate = B600; break;
281     case 1200 : tio_baudrate = B1200; break;
282     case 1800 : tio_baudrate = B1800; break;
283     case 2400 : tio_baudrate = B2400; break;
284     case 4800 : tio_baudrate = B4800; break;
285     case 9600 : tio_baudrate = B9600; break;
286     case 19200 : tio_baudrate = B19200; break;
287     case 38400 : tio_baudrate = B38400; break;
288     case 57600 : tio_baudrate = B57600; break;
289     #if defined(B76800)
290     case 76800 : tio_baudrate = B76800; break;
291     #endif
292     case 115200 : tio_baudrate = B115200; break;
293     #if defined(B230400)
294     case 230400 : tio_baudrate = B230400; break;
295     #endif
296     default:
297     fprintf(stderr, "error: unsupported baudrate\n");
298     return(-1);
299     }
300    
301     cfsetospeed(&tio, tio_baudrate);
302     cfsetispeed(&tio, tio_baudrate);
303    
304     tio.c_cflag &= ~CSIZE; /* clear size flag */
305     switch(option->databits) {
306     case 5 : tio.c_cflag |= CS5; break;
307     case 6 : tio.c_cflag |= CS6; break;
308     case 7 : tio.c_cflag |= CS7; break;
309     case 8 : tio.c_cflag |= CS8; break;
310     default :
311     fprintf(stderr, "error: unsupported databits\n");
312     return(-1);
313     }
314    
315     tio.c_iflag &= ~INPCK; /* clear parity flag */
316     tio.c_cflag &= ~(PARENB|PARODD);
317     switch(option->parity) {
318     case 0 : break;
319     case 2 : tio.c_iflag|=INPCK; tio.c_cflag|=PARENB; break; /* even */
320     case 1 : tio.c_iflag|=INPCK; tio.c_cflag|=PARENB|PARODD; break; /* odd */
321     default:
322     fprintf(stderr, "error: unsupported parity\n");
323     return(-1);
324     }
325    
326     tio.c_cflag &= ~CSTOPB; /* clear stop flag */
327     switch(option->stopbits) {
328     case 1 : break;
329     case 2 : tio.c_cflag |= CSTOPB; break;
330     default :
331     fprintf(stderr, "error: unsupported stopbits\n");
332     return(-1);
333     }
334    
335     #if defined(CRTSCTS)
336     tio.c_cflag &= ~CRTSCTS;
337     #endif
338     #if defined(CNEW_RTSCTS)
339     tio.c_cflag &= ~CNEW_RTSCTS;
340     #endif
341     if (option->hwflow) {
342     #if defined(CRTSCTS)
343     tio.c_cflag |= CRTSCTS;
344     #else
345     tio.c_cflag |= CNEW_RTSCTS;
346     #endif
347     }
348    
349     tio.c_cc[VTIME] = 0;
350     tio.c_cc[VMIN] = 1; /* block read() until one character is available */
351    
352     #if 0
353     /* not neccessary unless O_NONBLOCK used */
354     if (fcntl(vtty->fd, F_SETFL, 0) != 0) { /* enable blocking mode */
355     fprintf(stderr, "error: fnctl F_SETFL failed\n");
356     return(-1);
357     }
358     #endif
359    
360     if (tcflush(vtty->fd, TCIOFLUSH) != 0) {
361     fprintf(stderr, "error: tcflush failed\n");
362     return(-1);
363     }
364    
365     if (tcsetattr(vtty->fd, TCSANOW, &tio) != 0 ) {
366     fprintf(stderr, "error: tcsetattr failed\n");
367     return(-1);
368     }
369    
370     return(0);
371     }
372    
373     /* Create a virtual tty */
374     vtty_t *vtty_create(vm_instance_t *vm,char *name,int type,int tcp_port,
375     const vtty_serial_option_t *option)
376     {
377     vtty_t *vtty;
378    
379     if (!(vtty = malloc(sizeof(*vtty)))) {
380     fprintf(stderr,"VTTY: unable to create new virtual tty.\n");
381     return NULL;
382     }
383    
384     memset(vtty,0,sizeof(*vtty));
385     vtty->name = name;
386     vtty->type = type;
387     vtty->vm = vm;
388     vtty->fd = -1;
389     vtty->fstream = NULL;
390     vtty->accept_fd = -1;
391     pthread_mutex_init(&vtty->lock,NULL);
392     vtty->terminal_support = 1;
393     vtty->input_state = VTTY_INPUT_TEXT;
394    
395     switch (vtty->type) {
396     case VTTY_TYPE_NONE:
397     vtty->select_fd = NULL;
398     break;
399    
400     case VTTY_TYPE_TERM:
401     vtty_term_init();
402     vtty->fd = STDIN_FILENO;
403     vtty->select_fd = &vtty->fd;
404     vtty->fstream = stdout;
405     break;
406    
407     case VTTY_TYPE_TCP:
408     vtty->tcp_port = tcp_port;
409     vtty_tcp_conn_wait(vtty);
410     break;
411    
412     case VTTY_TYPE_SERIAL:
413     vtty->fd = open(option->device, O_RDWR);
414     if (vtty->fd < 0) {
415     fprintf(stderr,"VTTY: open failed\n");
416     free(vtty);
417     return NULL;
418     }
419     if (vtty_serial_setup(vtty,option)) {
420     fprintf(stderr,"VTTY: setup failed\n");
421     close(vtty->fd);
422     free(vtty);
423     return NULL;
424     }
425     vtty->select_fd = &vtty->fd;
426     vtty->terminal_support = 0;
427     break;
428    
429     default:
430     fprintf(stderr,"tty_create: bad vtty type %d\n",vtty->type);
431     return NULL;
432     }
433    
434     /* Add this new VTTY to the list */
435     VTTY_LIST_LOCK();
436     vtty->next = vtty_list;
437     vtty->pprev = &vtty_list;
438    
439     if (vtty_list != NULL)
440     vtty_list->pprev = &vtty->next;
441    
442     vtty_list = vtty;
443     VTTY_LIST_UNLOCK();
444     return vtty;
445     }
446    
447     /* Delete a virtual tty */
448     void vtty_delete(vtty_t *vtty)
449     {
450     if (vtty != NULL) {
451     if (vtty->pprev != NULL) {
452     VTTY_LIST_LOCK();
453     if (vtty->next)
454     vtty->next->pprev = vtty->pprev;
455     *(vtty->pprev) = vtty->next;
456     VTTY_LIST_UNLOCK();
457     }
458    
459     if ((vtty->fstream) && (vtty->fstream != stdout))
460     fclose(vtty->fstream);
461    
462     /* We don't close FD 0 since it is stdin */
463     if (vtty->fd > 0) {
464     vm_log(vtty->vm,"VTTY","%s: closing FD %d\n",vtty->name,vtty->fd);
465     close(vtty->fd);
466     }
467    
468     if (vtty->accept_fd != -1) {
469     vm_log(vtty->vm,"VTTY","%s: closing accept FD %d\n",
470     vtty->name,vtty->accept_fd);
471     close(vtty->accept_fd);
472     }
473    
474     free(vtty);
475     }
476     }
477    
478     /* Store a character in the FIFO buffer */
479     static int vtty_store(vtty_t *vtty,u_char c)
480     {
481     u_int nwptr;
482    
483     VTTY_LOCK(vtty);
484     nwptr = vtty->write_ptr + 1;
485     if (nwptr == VTTY_BUFFER_SIZE)
486     nwptr = 0;
487    
488     if (nwptr == vtty->read_ptr) {
489     VTTY_UNLOCK(vtty);
490     return(-1);
491     }
492    
493     vtty->buffer[vtty->write_ptr] = c;
494     vtty->write_ptr = nwptr;
495     VTTY_UNLOCK(vtty);
496     return(0);
497     }
498    
499     /* Store CTRL+C in buffer */
500     int vtty_store_ctrlc(vtty_t *vtty)
501     {
502     if (vtty)
503     vtty_store(vtty,0x03);
504     return(0);
505     }
506    
507     /*
508     * Read a character from the terminal.
509     */
510     static int vtty_term_read(vtty_t *vtty)
511     {
512     u_char c;
513    
514     if (read(vtty->fd,&c,1) == 1)
515     return(c);
516    
517     perror("read from vtty failed");
518     return(-1);
519     }
520    
521     /*
522     * Read a character from the TCP connection.
523     */
524     static int vtty_tcp_read(vtty_t *vtty)
525     {
526     u_char c;
527    
528     switch(vtty->state) {
529     case VTTY_STATE_TCP_RUNNING:
530     if (read(vtty->fd,&c,1) == 1)
531     return(c);
532    
533     /* Problem with the connection: Re-enter wait mode */
534     shutdown(vtty->fd,2);
535     fclose(vtty->fstream);
536     close(vtty->fd);
537     vtty->fstream = NULL;
538     vtty->fd = -1;
539     vtty->select_fd = &vtty->accept_fd;
540     vtty->state = VTTY_STATE_TCP_WAITING;
541     return(-1);
542    
543     case VTTY_STATE_TCP_WAITING:
544     /* A new connection has arrived */
545     vtty_tcp_conn_accept(vtty);
546     return(-1);
547     }
548    
549     /* Shouldn't happen... */
550     return(-1);
551     }
552    
553     /*
554     * Read a character from the virtual TTY.
555     *
556     * If the VTTY is a TCP connection, restart it in case of error.
557     */
558     static int vtty_read(vtty_t *vtty)
559     {
560     switch(vtty->type) {
561     case VTTY_TYPE_TERM:
562     case VTTY_TYPE_SERIAL:
563     return(vtty_term_read(vtty));
564     case VTTY_TYPE_TCP:
565     return(vtty_tcp_read(vtty));
566     default:
567     fprintf(stderr,"vtty_read: bad vtty type %d\n",vtty->type);
568     return(-1);
569     }
570    
571     /* NOTREACHED */
572     return(-1);
573     }
574    
575     /* Process remote control char */
576     static void remote_control(vtty_t *vtty,u_char c)
577     {
578     vm_instance_t *vm = vtty->vm;
579     cpu_mips_t *cpu0 = cpu_group_find_id(vm->cpu_group,0);
580    
581     switch(c) {
582     /* Show the object list */
583     case 'o':
584     vm_object_dump(vm);
585     break;
586    
587     /* Stop the MIPS VM */
588     case 'q':
589     vm->status = VM_STATUS_SHUTDOWN;
590     break;
591    
592     /* Reboot the C7200 */
593     case 'k':
594 dpavlin 2 if (vm->type == VM_TYPE_C7200)
595     c7200_boot_ios(VM_C7200(vm));
596 dpavlin 1 break;
597    
598     /* Show the device list */
599     case 'd':
600     dev_show_list(vm);
601     pci_dev_show_list(vm->pci_bus[0]);
602     pci_dev_show_list(vm->pci_bus[1]);
603     break;
604 dpavlin 2
605     /* Show info about Port Adapters or Network Modules */
606     case 'p':
607     switch(vm->type) {
608     case VM_TYPE_C3600:
609     c3600_nm_show_all_info(VM_C3600(vm));
610     break;
611     case VM_TYPE_C7200:
612     c7200_pa_show_all_info(VM_C7200(vm));
613     break;
614     }
615     break;
616 dpavlin 1
617     /* Dump the MIPS registers */
618     case 'r':
619     if (cpu0) mips64_dump_regs(cpu0);
620     break;
621    
622     /* Dump the latest memory accesses */
623     case 'm':
624     if (cpu0) memlog_dump(cpu0);
625     break;
626    
627     /* Suspend CPU emulation */
628     case 's':
629     vm_suspend(vm);
630     break;
631    
632     /* Resume CPU emulation */
633     case 'u':
634     vm_resume(vm);
635     break;
636    
637     /* Dump the MIPS TLB */
638     case 't':
639     if (cpu0) tlb_dump(cpu0);
640     break;
641    
642     /* Show information about JIT compiled pages */
643     case 'b':
644     if (cpu0) {
645     printf("\nCPU0: %u JIT compiled pages "
646     "[Exec Area Pages: %lu/%lu]\n",
647     cpu0->compiled_pages,
648     (u_long)cpu0->exec_page_alloc,
649     (u_long)cpu0->exec_page_count);
650     }
651     break;
652    
653     /* MTS64 cache statistics */
654     case 'l':
655     if (cpu0) {
656     mts64_show_stats(cpu0);
657     }
658     break;
659    
660     /* Extract the configuration from the NVRAM */
661     case 'c':
662     vm_ios_save_config(vm);
663     break;
664    
665     /* Non-JIT mode statistics */
666     case 'j':
667     if (cpu0) mips64_dump_stats(cpu0);
668     break;
669    
670     /* Determine an idle pointer counter */
671     case 'i':
672     if (cpu0) {
673     mips64_get_idling_pc(cpu0);
674     }
675     break;
676    
677     /* Experimentations / Tests */
678     case 'x':
679     if (cpu0) {
680     /* IRQ triggering */
681     mips64_set_irq(cpu0,2/*C7200_PA_MGMT_IRQ*/);
682 dpavlin 2 //mips64_set_irq(cpu0,C7200_PA_MGMT_IRQ);
683 dpavlin 1 }
684     break;
685    
686     /* Twice Ctrl + ']' (0x1d, 29), or Alt-Gr + '*' (0xb3, 179) */
687     case 0x1d:
688     case 0xb3:
689     vtty_store(vtty,c);
690     break;
691    
692     default:
693     printf("\n\nInstance %s (ID %d)\n\n",vm->name,vm->instance_id);
694    
695     printf("o - Show the VM object list\n"
696     "d - Show the device list\n"
697     "r - Dump MIPS CPU registers\n"
698     "t - Dump MIPS TLB entries\n"
699     "m - Dump the latest memory accesses\n"
700     "s - Suspend CPU emulation\n"
701     "u - Resume CPU emulation\n"
702     "q - Quit the emulator\n"
703     "k - Reboot the virtual machine\n"
704     "b - Show info about JIT compiled pages\n"
705     "l - MTS64 cache statistics\n"
706     "c - Write IOS configuration to disk\n"
707     "j - Non-JIT mode statistics\n"
708     "i - Determine an idling pointer counter\n"
709     "x - Experimentations (can crash the box!)\n"
710     "^] - Send ^]\n"
711     "Other - This help\n");
712     }
713     }
714    
715    
716     /* Read a character (until one is available) and store it in buffer */
717     static void vtty_read_and_store(vtty_t *vtty)
718     {
719     int c;
720    
721     /* wait until we get a character input */
722     c = vtty_read(vtty);
723    
724     /* if read error, do nothing */
725     if (c < 0) return;
726    
727     if (!vtty->terminal_support) {
728     vtty_store(vtty,c);
729     return;
730     }
731    
732     switch(vtty->input_state) {
733     case VTTY_INPUT_TEXT :
734     switch(c) {
735     case 0x1b:
736     vtty->input_state = VTTY_INPUT_VT1;
737     return;
738    
739     /* Ctrl + ']' (0x1d, 29), or Alt-Gr + '*' (0xb3, 179) */
740     case 0x1d:
741     case 0xb3:
742     vtty->input_state = VTTY_INPUT_REMOTE;
743     return;
744     case IAC :
745     vtty->input_state = VTTY_INPUT_TELNET;
746     return;
747     case 0: /* NULL - Must be ignored - generated by Linux telnet */
748     case 10: /* LF (Line Feed) - Must be ignored on Windows platform */
749     return;
750     default:
751     /* Store a standard character */
752     vtty_store(vtty,c);
753     return;
754     }
755    
756     case VTTY_INPUT_VT1 :
757     switch(c) {
758     case 0x5b:
759     vtty->input_state = VTTY_INPUT_VT2;
760     return;
761     default:
762     vtty_store(vtty,0x1b);
763     vtty_store(vtty,c);
764     }
765     vtty->input_state = VTTY_INPUT_TEXT;
766     return;
767    
768     case VTTY_INPUT_VT2 :
769     switch(c) {
770     case 0x41: /* Up Arrow */
771     vtty_store(vtty,16);
772     break;
773     case 0x42: /* Down Arrow */
774     vtty_store(vtty,14);
775     break;
776     case 0x43: /* Right Arrow */
777     vtty_store(vtty,6);
778     break;
779     case 0x44: /* Left Arrow */
780     vtty_store(vtty,2);
781     break;
782     default:
783     vtty_store(vtty,0x5b);
784     vtty_store(vtty,0x1b);
785     vtty_store(vtty,c);
786     break;
787     }
788     vtty->input_state = VTTY_INPUT_TEXT;
789     return;
790    
791     case VTTY_INPUT_REMOTE :
792     remote_control(vtty, c);
793     vtty->input_state = VTTY_INPUT_TEXT;
794     return;
795    
796     case VTTY_INPUT_TELNET :
797     vtty->telnet_cmd = c;
798     switch(c) {
799     case WILL:
800     case WONT:
801     case DO:
802     case DONT:
803     vtty->input_state = VTTY_INPUT_TELNET_IYOU;
804     return;
805     case SB :
806     vtty->telnet_cmd = c;
807     vtty->input_state = VTTY_INPUT_TELNET_SB1;
808     return;
809     case SE:
810     break;
811     case IAC :
812     vtty_store(vtty, IAC);
813     break;
814     }
815     vtty->input_state = VTTY_INPUT_TEXT;
816     return;
817    
818     case VTTY_INPUT_TELNET_IYOU :
819     vtty->telnet_opt = c;
820     /* if telnet client can support ttype, ask it to send ttype string */
821     if ((vtty->telnet_cmd == WILL) &&
822     (vtty->telnet_opt == TELOPT_TTYPE))
823     {
824     vtty_put_char(vtty, IAC);
825     vtty_put_char(vtty, SB);
826     vtty_put_char(vtty, TELOPT_TTYPE);
827     vtty_put_char(vtty, TELQUAL_SEND);
828     vtty_put_char(vtty, IAC);
829     vtty_put_char(vtty, SE);
830     }
831     vtty->input_state = VTTY_INPUT_TEXT;
832     return;
833    
834     case VTTY_INPUT_TELNET_SB1 :
835     vtty->telnet_opt = c;
836     vtty->input_state = VTTY_INPUT_TELNET_SB2;
837     return;
838    
839     case VTTY_INPUT_TELNET_SB2 :
840     vtty->telnet_qual = c;
841     if ((vtty->telnet_opt == TELOPT_TTYPE) &&
842     (vtty->telnet_qual == TELQUAL_IS))
843     vtty->input_state = VTTY_INPUT_TELNET_SB_TTYPE;
844     else
845     vtty->input_state = VTTY_INPUT_TELNET_NEXT;
846     return;
847    
848     case VTTY_INPUT_TELNET_SB_TTYPE :
849     /* parse ttype string: first char is sufficient */
850     /* if client is xterm or vt, set the title bar */
851     if ((c == 'x') || (c == 'X') || (c == 'v') || (c == 'V')) {
852     fprintf(vtty->fstream, "\033]0;Dynamips(%i): %s, %s\07",
853     vtty->vm->instance_id, vtty->vm->name, vtty->name);
854     }
855     vtty->input_state = VTTY_INPUT_TELNET_NEXT;
856     return;
857    
858     case VTTY_INPUT_TELNET_NEXT :
859     /* ignore all chars until next IAC */
860     if (c == IAC)
861     vtty->input_state = VTTY_INPUT_TELNET;
862     return;
863     }
864     }
865    
866     /* Read a character from the buffer (-1 if the buffer is empty) */
867     int vtty_get_char(vtty_t *vtty)
868     {
869     u_char c;
870    
871     VTTY_LOCK(vtty);
872    
873     if (vtty->read_ptr == vtty->write_ptr) {
874     VTTY_UNLOCK(vtty);
875     return(-1);
876     }
877    
878     c = vtty->buffer[vtty->read_ptr++];
879    
880     if (vtty->read_ptr == VTTY_BUFFER_SIZE)
881     vtty->read_ptr = 0;
882    
883     VTTY_UNLOCK(vtty);
884     return(c);
885     }
886    
887     /* Returns TRUE if a character is available in buffer */
888     int vtty_is_char_avail(vtty_t *vtty)
889     {
890     int res;
891    
892     VTTY_LOCK(vtty);
893     res = (vtty->read_ptr != vtty->write_ptr);
894     VTTY_UNLOCK(vtty);
895     return(res);
896     }
897    
898     /* put char to vtty */
899     void vtty_put_char(vtty_t *vtty, char ch)
900     {
901     switch(vtty->type) {
902     case VTTY_TYPE_NONE:
903     break;
904    
905     case VTTY_TYPE_TERM:
906     fwrite(&ch, 1, 1, vtty->fstream);
907     break;
908    
909     case VTTY_TYPE_TCP:
910     if ((vtty->state == VTTY_STATE_TCP_RUNNING) &&
911     (fwrite(&ch, 1, 1, vtty->fstream) != 1))
912     {
913     vm_log(vtty->vm,"VTTY","%s: put char %d failed (%s)\n",
914     vtty->name,(int)ch,strerror(errno));
915     }
916     break;
917    
918     case VTTY_TYPE_SERIAL:
919     if (write(vtty->fd,&ch,1) != 1) {
920     vm_log(vtty->vm,"VTTY","%s: put char 0x%x failed (%s)\n",
921     vtty->name,(int)ch,strerror(errno));
922     }
923     break;
924    
925     default:
926     fprintf(stderr,"vtty_put_char: bad vtty type %d\n",vtty->type);
927     exit(1);
928     }
929     }
930    
931     /* Flush VTTY output */
932     void vtty_flush(vtty_t *vtty)
933     {
934     switch(vtty->type) {
935     case VTTY_TYPE_TERM:
936     case VTTY_TYPE_TCP:
937     if (vtty->fstream)
938     fflush(vtty->fstream);
939     break;
940    
941     case VTTY_TYPE_SERIAL:
942     fsync(vtty->fd);
943     break;
944     }
945     }
946    
947     /* VTTY thread */
948     static void *vtty_thread_main(void *arg)
949     {
950     vtty_t *vtty;
951     struct timeval tv;
952     int fd,fd_max,res;
953     fd_set rfds;
954    
955     for(;;) {
956     VTTY_LIST_LOCK();
957    
958     /* Build the FD set */
959     FD_ZERO(&rfds);
960     fd_max = -1;
961     for(vtty=vtty_list;vtty;vtty=vtty->next) {
962     if (!vtty->select_fd)
963     continue;
964    
965     if ((fd = *vtty->select_fd) < 0)
966     continue;
967    
968     if (fd > fd_max) fd_max = fd;
969     FD_SET(fd,&rfds);
970     }
971     VTTY_LIST_UNLOCK();
972    
973     /* Wait for incoming data */
974     tv.tv_sec = 0;
975     tv.tv_usec = 50 * 1000; /* 50 ms */
976     res = select(fd_max+1,&rfds,NULL,NULL,&tv);
977    
978     if (res == -1) {
979     if (errno != EINTR) {
980     perror("vtty_thread: select");
981    
982     for(vtty=vtty_list;vtty;vtty=vtty->next) {
983     fprintf(stderr," %-15s: %s, FD %d\n",
984     vtty->vm->name,vtty->name,vtty->fd);
985     }
986     }
987     continue;
988     }
989    
990     /* Examine active FDs and call user handlers */
991     VTTY_LIST_LOCK();
992     for(vtty=vtty_list;vtty;vtty=vtty->next) {
993     if (!vtty->select_fd)
994     continue;
995    
996     if ((fd = *vtty->select_fd) < 0)
997     continue;
998    
999     if (FD_ISSET(fd,&rfds)) {
1000     vtty_read_and_store(vtty);
1001    
1002     if (vtty->read_notifier != NULL)
1003     vtty->read_notifier(vtty);
1004     }
1005    
1006     /* Flush any pending output */
1007     if (!vtty->managed_flush)
1008     vtty_flush(vtty);
1009     }
1010     VTTY_LIST_UNLOCK();
1011     }
1012    
1013     return NULL;
1014     }
1015    
1016     /* Initialize the VTTY thread */
1017     int vtty_init(void)
1018     {
1019     if (pthread_create(&vtty_thread,NULL,vtty_thread_main,NULL)) {
1020     perror("vtty: pthread_create");
1021     return(-1);
1022     }
1023    
1024     return(0);
1025     }

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