1 |
/* |
2 |
* Cisco 7200 (Predator) simulation platform. |
3 |
* Copyright (c) 2006 Christophe Fillot (cf@utc.fr) |
4 |
* |
5 |
* Hypervisor routines. |
6 |
*/ |
7 |
|
8 |
/* By default, Cygwin supports only 64 FDs with select()! */ |
9 |
#ifdef __CYGWIN__ |
10 |
#define FD_SETSIZE 1024 |
11 |
#endif |
12 |
|
13 |
#include <stdio.h> |
14 |
#include <stdlib.h> |
15 |
#include <unistd.h> |
16 |
#include <string.h> |
17 |
#include <sys/types.h> |
18 |
#include <sys/stat.h> |
19 |
#include <sys/mman.h> |
20 |
#include <signal.h> |
21 |
#include <fcntl.h> |
22 |
#include <errno.h> |
23 |
#include <assert.h> |
24 |
#include <stdarg.h> |
25 |
#include <sys/ioctl.h> |
26 |
#include <sys/types.h> |
27 |
#include <sys/socket.h> |
28 |
#include <arpa/inet.h> |
29 |
#include <pthread.h> |
30 |
|
31 |
#include "utils.h" |
32 |
#include "parser.h" |
33 |
#include "net.h" |
34 |
#include "registry.h" |
35 |
#include "mips64.h" |
36 |
#include "dynamips.h" |
37 |
#include "dev_c7200.h" |
38 |
#include "dev_c3600.h" |
39 |
#include "hypervisor.h" |
40 |
#include "net_io.h" |
41 |
#include "net_io_bridge.h" |
42 |
#include "frame_relay.h" |
43 |
#include "atm.h" |
44 |
|
45 |
#define DEBUG_TOKEN 0 |
46 |
|
47 |
/* Hypervisor modules */ |
48 |
static hypervisor_module_t *module_list = NULL; |
49 |
static volatile int hypervisor_running = 0; |
50 |
|
51 |
/* Hypervisor connection list */ |
52 |
static hypervisor_conn_t *hypervisor_conn_list = NULL; |
53 |
|
54 |
/* Show hypervisor version */ |
55 |
static int cmd_version(hypervisor_conn_t *conn,int argc,char *argv[]) |
56 |
{ |
57 |
hypervisor_send_reply(conn,HSC_INFO_OK,1,"%s",sw_version); |
58 |
return(0); |
59 |
} |
60 |
|
61 |
/* Show hypervisor module list */ |
62 |
static int cmd_mod_list(hypervisor_conn_t *conn,int argc,char *argv[]) |
63 |
{ |
64 |
hypervisor_module_t *m; |
65 |
|
66 |
for(m=module_list;m;m=m->next) |
67 |
hypervisor_send_reply(conn,HSC_INFO_MSG,0,"%s",m->name); |
68 |
|
69 |
hypervisor_send_reply(conn,HSC_INFO_OK,1,"OK"); |
70 |
return(0); |
71 |
} |
72 |
|
73 |
/* Show module command list */ |
74 |
static int cmd_modcmd_list(hypervisor_conn_t *conn,int argc,char *argv[]) |
75 |
{ |
76 |
hypervisor_module_t *m; |
77 |
hypervisor_cmd_t *cmd; |
78 |
|
79 |
if (!(m = hypervisor_find_module(argv[0]))) { |
80 |
hypervisor_send_reply(conn,HSC_ERR_UNK_MODULE,1,"unknown module '%s'", |
81 |
argv[0]); |
82 |
return(-1); |
83 |
} |
84 |
|
85 |
for(cmd=m->cmd_list;cmd;cmd=cmd->next) |
86 |
hypervisor_send_reply(conn,HSC_INFO_MSG,0,"%s (min/max args: %d/%d)", |
87 |
cmd->name,cmd->min_param,cmd->max_param); |
88 |
|
89 |
hypervisor_send_reply(conn,HSC_INFO_OK,1,"OK"); |
90 |
return(0); |
91 |
} |
92 |
|
93 |
/* Set working directory */ |
94 |
static int cmd_set_working_dir(hypervisor_conn_t *conn,int argc,char *argv[]) |
95 |
{ |
96 |
if (chdir(argv[0]) == -1) { |
97 |
hypervisor_send_reply(conn,HSC_ERR_INV_PARAM,1, |
98 |
"chdir: %s",strerror(errno)); |
99 |
} else { |
100 |
hypervisor_send_reply(conn,HSC_INFO_OK,1,"OK"); |
101 |
} |
102 |
return(0); |
103 |
} |
104 |
|
105 |
/* Save the hypervisor configuration in the specified file */ |
106 |
static int cmd_save_config(hypervisor_conn_t *conn,int argc,char *argv[]) |
107 |
{ |
108 |
FILE *fd; |
109 |
|
110 |
if (!(fd = fopen(argv[0],"w"))) { |
111 |
hypervisor_send_reply(conn,HSC_ERR_FILE,1,"fopen: %s",strerror(errno)); |
112 |
return(-1); |
113 |
} |
114 |
|
115 |
/* Save configuration for all objects */ |
116 |
netio_save_config_all(fd); |
117 |
frsw_save_config_all(fd); |
118 |
atmsw_save_config_all(fd); |
119 |
netio_bridge_save_config_all(fd); |
120 |
c7200_save_config_all(fd); |
121 |
c3600_save_config_all(fd); |
122 |
|
123 |
hypervisor_send_reply(conn,HSC_INFO_OK,1,"OK"); |
124 |
return(0); |
125 |
} |
126 |
|
127 |
/* Reset hypervisor (delete all objects) */ |
128 |
static int cmd_reset(hypervisor_conn_t *conn,int argc,char *argv[]) |
129 |
{ |
130 |
dynamips_reset(); |
131 |
hypervisor_send_reply(conn,HSC_INFO_OK,1,"OK"); |
132 |
return(0); |
133 |
} |
134 |
|
135 |
/* Close connection */ |
136 |
static int cmd_close(hypervisor_conn_t *conn,int argc,char *argv[]) |
137 |
{ |
138 |
hypervisor_send_reply(conn,HSC_INFO_OK,1,"OK"); |
139 |
conn->active = FALSE; |
140 |
return(0); |
141 |
} |
142 |
|
143 |
/* Stop hypervisor */ |
144 |
static int cmd_stop(hypervisor_conn_t *conn,int argc,char *argv[]) |
145 |
{ |
146 |
hypervisor_send_reply(conn,HSC_INFO_OK,1,"OK"); |
147 |
hypervisor_running = FALSE; |
148 |
return(0); |
149 |
} |
150 |
|
151 |
/* Hypervisor commands */ |
152 |
static hypervisor_cmd_t hypervisor_cmd_array[] = { |
153 |
{ "version", 0, 0, cmd_version, NULL }, |
154 |
{ "module_list", 0, 0, cmd_mod_list, NULL }, |
155 |
{ "cmd_list", 1, 1, cmd_modcmd_list, NULL }, |
156 |
{ "working_dir", 1, 1, cmd_set_working_dir, NULL }, |
157 |
{ "save_config", 1, 1, cmd_save_config, NULL }, |
158 |
{ "reset", 0, 0, cmd_reset, NULL }, |
159 |
{ "close", 0, 0, cmd_close, NULL }, |
160 |
{ "stop", 0, 0, cmd_stop, NULL }, |
161 |
{ NULL, -1, -1, NULL, NULL }, |
162 |
}; |
163 |
|
164 |
/* Send a reply */ |
165 |
int hypervisor_send_reply(hypervisor_conn_t *conn,int code,int done, |
166 |
char *format,...) |
167 |
{ |
168 |
va_list ap; |
169 |
size_t n = 0; |
170 |
|
171 |
if (conn != NULL) { |
172 |
va_start(ap,format); |
173 |
n += fprintf(conn->out,"%3d%s",code,(done)?"-":" "); |
174 |
n += vfprintf(conn->out,format,ap); |
175 |
n += fprintf(conn->out,"\r\n"); |
176 |
fflush(conn->out); |
177 |
va_end(ap); |
178 |
} |
179 |
|
180 |
return(n); |
181 |
} |
182 |
|
183 |
/* Find a module */ |
184 |
hypervisor_module_t *hypervisor_find_module(char *name) |
185 |
{ |
186 |
hypervisor_module_t *m; |
187 |
|
188 |
for(m=module_list;m;m=m->next) |
189 |
if (!strcmp(m->name,name)) |
190 |
return m; |
191 |
|
192 |
return NULL; |
193 |
} |
194 |
|
195 |
/* Find a command in a module */ |
196 |
hypervisor_cmd_t *hypervisor_find_cmd(hypervisor_module_t *module,char *name) |
197 |
{ |
198 |
hypervisor_cmd_t *cmd; |
199 |
|
200 |
for(cmd=module->cmd_list;cmd;cmd=cmd->next) |
201 |
if (!strcmp(cmd->name,name)) |
202 |
return cmd; |
203 |
|
204 |
return NULL; |
205 |
} |
206 |
|
207 |
/* Find an object in the registry */ |
208 |
void *hypervisor_find_object(hypervisor_conn_t *conn,char *name,int obj_type) |
209 |
{ |
210 |
void *p; |
211 |
|
212 |
if (!(p = registry_find(name,obj_type))) { |
213 |
hypervisor_send_reply(conn,HSC_ERR_UNK_OBJ,1, |
214 |
"unable to find object '%s'",name); |
215 |
return NULL; |
216 |
} |
217 |
|
218 |
return p; |
219 |
} |
220 |
|
221 |
/* Find a VM in the registry */ |
222 |
void *hypervisor_find_vm(hypervisor_conn_t *conn,char *name,int vm_type) |
223 |
{ |
224 |
vm_instance_t *vm; |
225 |
|
226 |
if (!(vm = vm_acquire(name))) { |
227 |
hypervisor_send_reply(conn,HSC_ERR_UNK_OBJ,1, |
228 |
"unable to find VM '%s'",name); |
229 |
return NULL; |
230 |
} |
231 |
|
232 |
if (vm->type != vm_type) { |
233 |
vm_release(vm); |
234 |
hypervisor_send_reply(conn,HSC_ERR_BAD_OBJ,1, |
235 |
"VM '%s' is not a VM type %d", |
236 |
name,vm_type); |
237 |
return NULL; |
238 |
} |
239 |
|
240 |
return vm; |
241 |
} |
242 |
|
243 |
/* Register a module */ |
244 |
hypervisor_module_t *hypervisor_register_module(char *name) |
245 |
{ |
246 |
hypervisor_module_t *m; |
247 |
|
248 |
if (hypervisor_find_module(name) != NULL) { |
249 |
fprintf(stderr,"Hypervisor: module '%s' already exists.\n",name); |
250 |
return NULL; |
251 |
} |
252 |
|
253 |
if (!(m = malloc(sizeof(*m)))) { |
254 |
fprintf(stderr,"Hypervisor: unable to register new module.\n"); |
255 |
return NULL; |
256 |
} |
257 |
|
258 |
m->name = name; |
259 |
m->cmd_list = NULL; |
260 |
|
261 |
m->next = module_list; |
262 |
module_list = m; |
263 |
return m; |
264 |
} |
265 |
|
266 |
/* Register a list of commands */ |
267 |
int hypervisor_register_cmd_list(hypervisor_module_t *module, |
268 |
hypervisor_cmd_t *cmd_list) |
269 |
{ |
270 |
hypervisor_cmd_t *cmd = cmd_list; |
271 |
|
272 |
while(cmd->next != NULL) |
273 |
cmd = cmd->next; |
274 |
|
275 |
cmd->next = module->cmd_list; |
276 |
module->cmd_list = cmd_list; |
277 |
return(0); |
278 |
} |
279 |
|
280 |
/* Register an array of commands */ |
281 |
int hypervisor_register_cmd_array(hypervisor_module_t *module, |
282 |
hypervisor_cmd_t *cmd_array) |
283 |
{ |
284 |
hypervisor_cmd_t *cmd; |
285 |
|
286 |
for(cmd=cmd_array;cmd->name!=NULL;cmd++) { |
287 |
cmd->next = module->cmd_list; |
288 |
module->cmd_list = cmd; |
289 |
} |
290 |
|
291 |
return(0); |
292 |
} |
293 |
|
294 |
/* Locate the module and execute command */ |
295 |
static int hypervisor_exec_cmd(hypervisor_conn_t *conn, |
296 |
char *mod_name,char *cmd_name, |
297 |
int argc,char *argv[]) |
298 |
{ |
299 |
hypervisor_module_t *module; |
300 |
hypervisor_cmd_t *cmd; |
301 |
|
302 |
if (!(module = hypervisor_find_module(mod_name))) { |
303 |
hypervisor_send_reply(conn,HSC_ERR_UNK_MODULE,1,"Unknown module '%s'", |
304 |
mod_name); |
305 |
return(-1); |
306 |
} |
307 |
|
308 |
if (!(cmd = hypervisor_find_cmd(module,cmd_name))) { |
309 |
hypervisor_send_reply(conn,HSC_ERR_UNK_CMD,1,"Unknown command '%s'", |
310 |
cmd_name); |
311 |
return(-1); |
312 |
} |
313 |
|
314 |
if ((argc < cmd->min_param) || (argc > cmd->max_param)) { |
315 |
hypervisor_send_reply(conn,HSC_ERR_BAD_PARAM,1, |
316 |
"Bad number of parameters (%d with min/max=%d/%d)", |
317 |
argc,cmd->min_param,cmd->max_param); |
318 |
return(-1); |
319 |
} |
320 |
|
321 |
return(cmd->handler(conn,argc,argv)); |
322 |
} |
323 |
|
324 |
/* Thread for servicing connections */ |
325 |
static void *hypervisor_thread(void *arg) |
326 |
{ |
327 |
hypervisor_conn_t *conn = arg; |
328 |
char buffer[4096],**tokens; |
329 |
parser_token_t *tok_list; |
330 |
int res,tok_count; |
331 |
|
332 |
while(conn->active) { |
333 |
if (!m_fgets(buffer,sizeof(buffer),conn->in)) |
334 |
break; |
335 |
|
336 |
if (!*buffer) |
337 |
continue; |
338 |
|
339 |
/* Tokenize command line */ |
340 |
tokens = NULL; |
341 |
res = parser_tokenize(buffer,&tok_list,&tok_count); |
342 |
|
343 |
if (res != 0) { |
344 |
hypervisor_send_reply(conn,HSC_ERR_PARSING,1,"Parse error: %s", |
345 |
parser_strerror(res)); |
346 |
continue; |
347 |
} |
348 |
|
349 |
if (tok_count < 2) { |
350 |
hypervisor_send_reply(conn,HSC_ERR_PARSING,1, |
351 |
"At least a module and a command " |
352 |
"must be specified"); |
353 |
goto free_tokens; |
354 |
} |
355 |
|
356 |
/* Map token list to an array */ |
357 |
tokens = parser_map_array(tok_list,tok_count); |
358 |
|
359 |
if (!tokens) { |
360 |
hypervisor_send_reply(conn,HSC_ERR_PARSING,1,"No memory"); |
361 |
goto free_tokens; |
362 |
} |
363 |
|
364 |
/* Execute command */ |
365 |
m_log("hypervisor_exec","%s\n",buffer); |
366 |
hypervisor_exec_cmd(conn,tokens[0],tokens[1],tok_count-2,&tokens[2]); |
367 |
|
368 |
free_tokens: |
369 |
free(tokens); |
370 |
parser_free_tokens(tok_list); |
371 |
} |
372 |
|
373 |
return NULL; |
374 |
} |
375 |
|
376 |
static void sigpipe_handler(int sig) |
377 |
{ |
378 |
printf("SIGPIPE received.\n"); |
379 |
} |
380 |
|
381 |
/* Initialize hypervisor */ |
382 |
int hypervisor_init(void) |
383 |
{ |
384 |
hypervisor_module_t *module; |
385 |
|
386 |
module = hypervisor_register_module("hypervisor"); |
387 |
assert(module != NULL); |
388 |
|
389 |
hypervisor_register_cmd_array(module,hypervisor_cmd_array); |
390 |
return(0); |
391 |
} |
392 |
|
393 |
/* Remove a connection from the list */ |
394 |
static void hypervisor_remove_conn(hypervisor_conn_t *conn) |
395 |
{ |
396 |
if (conn->pprev != NULL) { |
397 |
if (conn->next) |
398 |
conn->next->pprev = conn->pprev; |
399 |
|
400 |
*(conn->pprev) = conn->next; |
401 |
} |
402 |
} |
403 |
|
404 |
/* Close a connection */ |
405 |
static void hypervisor_close_conn(hypervisor_conn_t *conn) |
406 |
{ |
407 |
if (conn != NULL) { |
408 |
conn->active = FALSE; |
409 |
shutdown(conn->client_fd,2); |
410 |
pthread_join(conn->tid,NULL); |
411 |
|
412 |
fclose(conn->in); |
413 |
fclose(conn->out); |
414 |
|
415 |
shutdown(conn->client_fd,2); |
416 |
close(conn->client_fd); |
417 |
|
418 |
hypervisor_remove_conn(conn); |
419 |
free(conn); |
420 |
} |
421 |
} |
422 |
|
423 |
/* Close connections (dead or all) */ |
424 |
static void hypervisor_close_conn_list(int dead_status) |
425 |
{ |
426 |
hypervisor_conn_t *conn,*next; |
427 |
|
428 |
for(conn=hypervisor_conn_list;conn;conn=next) { |
429 |
next = conn->next; |
430 |
|
431 |
if (dead_status && conn->active) |
432 |
continue; |
433 |
|
434 |
hypervisor_close_conn(conn); |
435 |
} |
436 |
} |
437 |
|
438 |
/* Add a new connection to the list */ |
439 |
static void hypervisor_add_conn(hypervisor_conn_t *conn) |
440 |
{ |
441 |
conn->next = hypervisor_conn_list; |
442 |
conn->pprev = &hypervisor_conn_list; |
443 |
|
444 |
if (hypervisor_conn_list != NULL) |
445 |
hypervisor_conn_list->pprev = &conn->next; |
446 |
|
447 |
hypervisor_conn_list = conn; |
448 |
} |
449 |
|
450 |
/* Create a new connection */ |
451 |
static hypervisor_conn_t *hypervisor_create_conn(int client_fd) |
452 |
{ |
453 |
hypervisor_conn_t *conn; |
454 |
|
455 |
if (!(conn = malloc(sizeof(*conn)))) |
456 |
goto err_malloc; |
457 |
|
458 |
memset(conn,0,sizeof(*conn)); |
459 |
conn->active = TRUE; |
460 |
conn->client_fd = client_fd; |
461 |
|
462 |
/* Open input buffered stream */ |
463 |
if (!(conn->in = fdopen(client_fd,"r"))) { |
464 |
perror("hypervisor_create_conn: fdopen/in"); |
465 |
goto err_fd_in; |
466 |
} |
467 |
|
468 |
/* Open output buffered stream */ |
469 |
if (!(conn->out = fdopen(client_fd,"w"))) { |
470 |
perror("hypervisor_create_conn: fdopen/out"); |
471 |
goto err_fd_out; |
472 |
} |
473 |
|
474 |
/* Set line buffering */ |
475 |
setlinebuf(conn->in); |
476 |
setlinebuf(conn->out); |
477 |
|
478 |
/* Create the managing thread */ |
479 |
if (pthread_create(&conn->tid,NULL,hypervisor_thread,conn) != 0) |
480 |
goto err_thread; |
481 |
|
482 |
/* Add it to the connection list */ |
483 |
hypervisor_add_conn(conn); |
484 |
return conn; |
485 |
|
486 |
err_thread: |
487 |
fclose(conn->out); |
488 |
err_fd_out: |
489 |
fclose(conn->in); |
490 |
err_fd_in: |
491 |
free(conn); |
492 |
err_malloc: |
493 |
return NULL; |
494 |
} |
495 |
|
496 |
/* Stop hypervisor from sighandler */ |
497 |
int hypervisor_stopsig(void) |
498 |
{ |
499 |
hypervisor_running = FALSE; |
500 |
return(0); |
501 |
} |
502 |
|
503 |
/* Hypervisor TCP server */ |
504 |
int hypervisor_tcp_server(int tcp_port) |
505 |
{ |
506 |
int fd_array[HYPERVISOR_MAX_FD]; |
507 |
struct sockaddr_storage remote_addr; |
508 |
socklen_t remote_len; |
509 |
int i,res,clnt,fd_count,fd_max; |
510 |
struct timeval tv; |
511 |
fd_set fds; |
512 |
|
513 |
/* Initialize all hypervisor modules */ |
514 |
hypervisor_init(); |
515 |
hypervisor_nio_init(); |
516 |
hypervisor_nio_bridge_init(); |
517 |
hypervisor_frsw_init(); |
518 |
hypervisor_atmsw_init(); |
519 |
hypervisor_ethsw_init(); |
520 |
hypervisor_vm_init(); |
521 |
hypervisor_c7200_init(); |
522 |
hypervisor_c3600_init(); |
523 |
|
524 |
signal(SIGPIPE,sigpipe_handler); |
525 |
|
526 |
if (!tcp_port) |
527 |
tcp_port = HYPERVISOR_TCP_PORT; |
528 |
|
529 |
fd_count = ip_listen(tcp_port,SOCK_STREAM,HYPERVISOR_MAX_FD,fd_array); |
530 |
|
531 |
if (fd_count <= 0) { |
532 |
fprintf(stderr,"Hypervisor: unable to create TCP sockets.\n"); |
533 |
return(-1); |
534 |
} |
535 |
|
536 |
/* Start accepting connections */ |
537 |
printf("Hypervisor TCP control server started.\n"); |
538 |
hypervisor_running = TRUE; |
539 |
|
540 |
while(hypervisor_running) { |
541 |
FD_ZERO(&fds); |
542 |
fd_max = -1; |
543 |
|
544 |
for(i=0;i<fd_count;i++) |
545 |
if (fd_array[i] != -1) { |
546 |
FD_SET(fd_array[i],&fds); |
547 |
if (fd_array[i] > fd_max) |
548 |
fd_max = fd_array[i]; |
549 |
} |
550 |
|
551 |
/* Wait for incoming connections */ |
552 |
tv.tv_sec = 0; |
553 |
tv.tv_usec = 500 * 1000; /* 500 ms */ |
554 |
res = select(fd_max+1,&fds,NULL,NULL,&tv); |
555 |
|
556 |
if (res == -1) { |
557 |
if (errno == EINTR) |
558 |
continue; |
559 |
else |
560 |
perror("hypervisor_tcp_server: select"); |
561 |
} |
562 |
|
563 |
/* Accept connections on signaled sockets */ |
564 |
for(i=0;i<fd_count;i++) { |
565 |
if (fd_array[i] == -1) |
566 |
continue; |
567 |
|
568 |
if (!FD_ISSET(fd_array[i],&fds)) |
569 |
continue; |
570 |
|
571 |
remote_len = sizeof(remote_addr); |
572 |
clnt = accept(fd_array[i],(struct sockaddr *)&remote_addr, |
573 |
&remote_len); |
574 |
|
575 |
if (clnt < 0) { |
576 |
perror("hypervisor_tcp_server: accept"); |
577 |
continue; |
578 |
} |
579 |
|
580 |
/* create a new connection and start a thread to handle it */ |
581 |
if (!hypervisor_create_conn(clnt)) { |
582 |
fprintf(stderr,"hypervisor_tcp_server: unable to create new " |
583 |
"connection for FD %d\n",clnt); |
584 |
close(clnt); |
585 |
} |
586 |
} |
587 |
|
588 |
/* Walk through the connection list to eliminate dead connections */ |
589 |
hypervisor_close_conn_list(TRUE); |
590 |
} |
591 |
|
592 |
/* Close all control sockets */ |
593 |
printf("Hypervisor: closing control sockets.\n"); |
594 |
for(i=0;i<fd_count;i++) { |
595 |
if (fd_array[i] != -1) { |
596 |
shutdown(fd_array[i],2); |
597 |
close(fd_array[i]); |
598 |
} |
599 |
} |
600 |
|
601 |
/* Close all remote client connections */ |
602 |
printf("Hypervisor: closing remote client connections.\n"); |
603 |
hypervisor_close_conn_list(FALSE); |
604 |
return(0); |
605 |
} |