qdev: remove baked in notion of aliases (v2)
[qemu.git] / net / slirp.c
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 "net/slirp.h"
25
26 #include "config-host.h"
27
28 #ifndef _WIN32
29 #include <sys/wait.h>
30 #endif
31 #include "net.h"
32 #include "monitor.h"
33 #include "qemu_socket.h"
34 #include "slirp/libslirp.h"
35
36 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
37 {
38 const char *p, *p1;
39 int len;
40 p = *pp;
41 p1 = strchr(p, sep);
42 if (!p1)
43 return -1;
44 len = p1 - p;
45 p1++;
46 if (buf_size > 0) {
47 if (len > buf_size - 1)
48 len = buf_size - 1;
49 memcpy(buf, p, len);
50 buf[len] = '\0';
51 }
52 *pp = p1;
53 return 0;
54 }
55
56 /* slirp network adapter */
57
58 #define SLIRP_CFG_HOSTFWD 1
59 #define SLIRP_CFG_LEGACY 2
60
61 struct slirp_config_str {
62 struct slirp_config_str *next;
63 int flags;
64 char str[1024];
65 int legacy_format;
66 };
67
68 typedef struct SlirpState {
69 VLANClientState nc;
70 QTAILQ_ENTRY(SlirpState) entry;
71 Slirp *slirp;
72 #ifndef _WIN32
73 char smb_dir[128];
74 #endif
75 } SlirpState;
76
77 static struct slirp_config_str *slirp_configs;
78 const char *legacy_tftp_prefix;
79 const char *legacy_bootp_filename;
80 static QTAILQ_HEAD(slirp_stacks, SlirpState) slirp_stacks =
81 QTAILQ_HEAD_INITIALIZER(slirp_stacks);
82
83 static int slirp_hostfwd(SlirpState *s, const char *redir_str,
84 int legacy_format);
85 static int slirp_guestfwd(SlirpState *s, const char *config_str,
86 int legacy_format);
87
88 #ifndef _WIN32
89 static const char *legacy_smb_export;
90
91 static int slirp_smb(SlirpState *s, const char *exported_dir,
92 struct in_addr vserver_addr);
93 static void slirp_smb_cleanup(SlirpState *s);
94 #else
95 static inline void slirp_smb_cleanup(SlirpState *s) { }
96 #endif
97
98 int slirp_can_output(void *opaque)
99 {
100 SlirpState *s = opaque;
101
102 return qemu_can_send_packet(&s->nc);
103 }
104
105 void slirp_output(void *opaque, const uint8_t *pkt, int pkt_len)
106 {
107 SlirpState *s = opaque;
108
109 qemu_send_packet(&s->nc, pkt, pkt_len);
110 }
111
112 static ssize_t net_slirp_receive(VLANClientState *nc, const uint8_t *buf, size_t size)
113 {
114 SlirpState *s = DO_UPCAST(SlirpState, nc, nc);
115
116 slirp_input(s->slirp, buf, size);
117
118 return size;
119 }
120
121 static void net_slirp_cleanup(VLANClientState *nc)
122 {
123 SlirpState *s = DO_UPCAST(SlirpState, nc, nc);
124
125 slirp_cleanup(s->slirp);
126 slirp_smb_cleanup(s);
127 QTAILQ_REMOVE(&slirp_stacks, s, entry);
128 }
129
130 static NetClientInfo net_slirp_info = {
131 .type = NET_CLIENT_TYPE_USER,
132 .size = sizeof(SlirpState),
133 .receive = net_slirp_receive,
134 .cleanup = net_slirp_cleanup,
135 };
136
137 static int net_slirp_init(VLANState *vlan, const char *model,
138 const char *name, int restricted,
139 const char *vnetwork, const char *vhost,
140 const char *vhostname, const char *tftp_export,
141 const char *bootfile, const char *vdhcp_start,
142 const char *vnameserver, const char *smb_export,
143 const char *vsmbserver)
144 {
145 /* default settings according to historic slirp */
146 struct in_addr net = { .s_addr = htonl(0x0a000200) }; /* 10.0.2.0 */
147 struct in_addr mask = { .s_addr = htonl(0xffffff00) }; /* 255.255.255.0 */
148 struct in_addr host = { .s_addr = htonl(0x0a000202) }; /* 10.0.2.2 */
149 struct in_addr dhcp = { .s_addr = htonl(0x0a00020f) }; /* 10.0.2.15 */
150 struct in_addr dns = { .s_addr = htonl(0x0a000203) }; /* 10.0.2.3 */
151 #ifndef _WIN32
152 struct in_addr smbsrv = { .s_addr = 0 };
153 #endif
154 VLANClientState *nc;
155 SlirpState *s;
156 char buf[20];
157 uint32_t addr;
158 int shift;
159 char *end;
160 struct slirp_config_str *config;
161
162 if (!tftp_export) {
163 tftp_export = legacy_tftp_prefix;
164 }
165 if (!bootfile) {
166 bootfile = legacy_bootp_filename;
167 }
168
169 if (vnetwork) {
170 if (get_str_sep(buf, sizeof(buf), &vnetwork, '/') < 0) {
171 if (!inet_aton(vnetwork, &net)) {
172 return -1;
173 }
174 addr = ntohl(net.s_addr);
175 if (!(addr & 0x80000000)) {
176 mask.s_addr = htonl(0xff000000); /* class A */
177 } else if ((addr & 0xfff00000) == 0xac100000) {
178 mask.s_addr = htonl(0xfff00000); /* priv. 172.16.0.0/12 */
179 } else if ((addr & 0xc0000000) == 0x80000000) {
180 mask.s_addr = htonl(0xffff0000); /* class B */
181 } else if ((addr & 0xffff0000) == 0xc0a80000) {
182 mask.s_addr = htonl(0xffff0000); /* priv. 192.168.0.0/16 */
183 } else if ((addr & 0xffff0000) == 0xc6120000) {
184 mask.s_addr = htonl(0xfffe0000); /* tests 198.18.0.0/15 */
185 } else if ((addr & 0xe0000000) == 0xe0000000) {
186 mask.s_addr = htonl(0xffffff00); /* class C */
187 } else {
188 mask.s_addr = htonl(0xfffffff0); /* multicast/reserved */
189 }
190 } else {
191 if (!inet_aton(buf, &net)) {
192 return -1;
193 }
194 shift = strtol(vnetwork, &end, 10);
195 if (*end != '\0') {
196 if (!inet_aton(vnetwork, &mask)) {
197 return -1;
198 }
199 } else if (shift < 4 || shift > 32) {
200 return -1;
201 } else {
202 mask.s_addr = htonl(0xffffffff << (32 - shift));
203 }
204 }
205 net.s_addr &= mask.s_addr;
206 host.s_addr = net.s_addr | (htonl(0x0202) & ~mask.s_addr);
207 dhcp.s_addr = net.s_addr | (htonl(0x020f) & ~mask.s_addr);
208 dns.s_addr = net.s_addr | (htonl(0x0203) & ~mask.s_addr);
209 }
210
211 if (vhost && !inet_aton(vhost, &host)) {
212 return -1;
213 }
214 if ((host.s_addr & mask.s_addr) != net.s_addr) {
215 return -1;
216 }
217
218 if (vdhcp_start && !inet_aton(vdhcp_start, &dhcp)) {
219 return -1;
220 }
221 if ((dhcp.s_addr & mask.s_addr) != net.s_addr ||
222 dhcp.s_addr == host.s_addr || dhcp.s_addr == dns.s_addr) {
223 return -1;
224 }
225
226 if (vnameserver && !inet_aton(vnameserver, &dns)) {
227 return -1;
228 }
229 if ((dns.s_addr & mask.s_addr) != net.s_addr ||
230 dns.s_addr == host.s_addr) {
231 return -1;
232 }
233
234 #ifndef _WIN32
235 if (vsmbserver && !inet_aton(vsmbserver, &smbsrv)) {
236 return -1;
237 }
238 #endif
239
240 nc = qemu_new_net_client(&net_slirp_info, vlan, NULL, model, name);
241
242 snprintf(nc->info_str, sizeof(nc->info_str),
243 "net=%s,restrict=%s", inet_ntoa(net),
244 restricted ? "on" : "off");
245
246 s = DO_UPCAST(SlirpState, nc, nc);
247
248 s->slirp = slirp_init(restricted, net, mask, host, vhostname,
249 tftp_export, bootfile, dhcp, dns, s);
250 QTAILQ_INSERT_TAIL(&slirp_stacks, s, entry);
251
252 for (config = slirp_configs; config; config = config->next) {
253 if (config->flags & SLIRP_CFG_HOSTFWD) {
254 if (slirp_hostfwd(s, config->str,
255 config->flags & SLIRP_CFG_LEGACY) < 0)
256 goto error;
257 } else {
258 if (slirp_guestfwd(s, config->str,
259 config->flags & SLIRP_CFG_LEGACY) < 0)
260 goto error;
261 }
262 }
263 #ifndef _WIN32
264 if (!smb_export) {
265 smb_export = legacy_smb_export;
266 }
267 if (smb_export) {
268 if (slirp_smb(s, smb_export, smbsrv) < 0)
269 goto error;
270 }
271 #endif
272
273 return 0;
274
275 error:
276 qemu_del_vlan_client(nc);
277 return -1;
278 }
279
280 static SlirpState *slirp_lookup(Monitor *mon, const char *vlan,
281 const char *stack)
282 {
283
284 if (vlan) {
285 VLANClientState *nc;
286 nc = qemu_find_vlan_client_by_name(mon, strtol(vlan, NULL, 0), stack);
287 if (!nc) {
288 return NULL;
289 }
290 if (strcmp(nc->model, "user")) {
291 monitor_printf(mon, "invalid device specified\n");
292 return NULL;
293 }
294 return DO_UPCAST(SlirpState, nc, nc);
295 } else {
296 if (QTAILQ_EMPTY(&slirp_stacks)) {
297 monitor_printf(mon, "user mode network stack not in use\n");
298 return NULL;
299 }
300 return QTAILQ_FIRST(&slirp_stacks);
301 }
302 }
303
304 void net_slirp_hostfwd_remove(Monitor *mon, const QDict *qdict)
305 {
306 struct in_addr host_addr = { .s_addr = INADDR_ANY };
307 int host_port;
308 char buf[256];
309 const char *src_str, *p;
310 SlirpState *s;
311 int is_udp = 0;
312 int err;
313 const char *arg1 = qdict_get_str(qdict, "arg1");
314 const char *arg2 = qdict_get_try_str(qdict, "arg2");
315 const char *arg3 = qdict_get_try_str(qdict, "arg3");
316
317 if (arg2) {
318 s = slirp_lookup(mon, arg1, arg2);
319 src_str = arg3;
320 } else {
321 s = slirp_lookup(mon, NULL, NULL);
322 src_str = arg1;
323 }
324 if (!s) {
325 return;
326 }
327
328 p = src_str;
329 if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
330 goto fail_syntax;
331 }
332
333 if (!strcmp(buf, "tcp") || buf[0] == '\0') {
334 is_udp = 0;
335 } else if (!strcmp(buf, "udp")) {
336 is_udp = 1;
337 } else {
338 goto fail_syntax;
339 }
340
341 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
342 goto fail_syntax;
343 }
344 if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
345 goto fail_syntax;
346 }
347
348 host_port = atoi(p);
349
350 err = slirp_remove_hostfwd(QTAILQ_FIRST(&slirp_stacks)->slirp, is_udp,
351 host_addr, host_port);
352
353 monitor_printf(mon, "host forwarding rule for %s %s\n", src_str,
354 err ? "not found" : "removed");
355 return;
356
357 fail_syntax:
358 monitor_printf(mon, "invalid format\n");
359 }
360
361 static int slirp_hostfwd(SlirpState *s, const char *redir_str,
362 int legacy_format)
363 {
364 struct in_addr host_addr = { .s_addr = INADDR_ANY };
365 struct in_addr guest_addr = { .s_addr = 0 };
366 int host_port, guest_port;
367 const char *p;
368 char buf[256];
369 int is_udp;
370 char *end;
371
372 p = redir_str;
373 if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
374 goto fail_syntax;
375 }
376 if (!strcmp(buf, "tcp") || buf[0] == '\0') {
377 is_udp = 0;
378 } else if (!strcmp(buf, "udp")) {
379 is_udp = 1;
380 } else {
381 goto fail_syntax;
382 }
383
384 if (!legacy_format) {
385 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
386 goto fail_syntax;
387 }
388 if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
389 goto fail_syntax;
390 }
391 }
392
393 if (get_str_sep(buf, sizeof(buf), &p, legacy_format ? ':' : '-') < 0) {
394 goto fail_syntax;
395 }
396 host_port = strtol(buf, &end, 0);
397 if (*end != '\0' || host_port < 1 || host_port > 65535) {
398 goto fail_syntax;
399 }
400
401 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
402 goto fail_syntax;
403 }
404 if (buf[0] != '\0' && !inet_aton(buf, &guest_addr)) {
405 goto fail_syntax;
406 }
407
408 guest_port = strtol(p, &end, 0);
409 if (*end != '\0' || guest_port < 1 || guest_port > 65535) {
410 goto fail_syntax;
411 }
412
413 if (slirp_add_hostfwd(s->slirp, is_udp, host_addr, host_port, guest_addr,
414 guest_port) < 0) {
415 error_report("could not set up host forwarding rule '%s'",
416 redir_str);
417 return -1;
418 }
419 return 0;
420
421 fail_syntax:
422 error_report("invalid host forwarding rule '%s'", redir_str);
423 return -1;
424 }
425
426 void net_slirp_hostfwd_add(Monitor *mon, const QDict *qdict)
427 {
428 const char *redir_str;
429 SlirpState *s;
430 const char *arg1 = qdict_get_str(qdict, "arg1");
431 const char *arg2 = qdict_get_try_str(qdict, "arg2");
432 const char *arg3 = qdict_get_try_str(qdict, "arg3");
433
434 if (arg2) {
435 s = slirp_lookup(mon, arg1, arg2);
436 redir_str = arg3;
437 } else {
438 s = slirp_lookup(mon, NULL, NULL);
439 redir_str = arg1;
440 }
441 if (s) {
442 slirp_hostfwd(s, redir_str, 0);
443 }
444
445 }
446
447 int net_slirp_redir(const char *redir_str)
448 {
449 struct slirp_config_str *config;
450
451 if (QTAILQ_EMPTY(&slirp_stacks)) {
452 config = g_malloc(sizeof(*config));
453 pstrcpy(config->str, sizeof(config->str), redir_str);
454 config->flags = SLIRP_CFG_HOSTFWD | SLIRP_CFG_LEGACY;
455 config->next = slirp_configs;
456 slirp_configs = config;
457 return 0;
458 }
459
460 return slirp_hostfwd(QTAILQ_FIRST(&slirp_stacks), redir_str, 1);
461 }
462
463 #ifndef _WIN32
464
465 /* automatic user mode samba server configuration */
466 static void slirp_smb_cleanup(SlirpState *s)
467 {
468 char cmd[128];
469 int ret;
470
471 if (s->smb_dir[0] != '\0') {
472 snprintf(cmd, sizeof(cmd), "rm -rf %s", s->smb_dir);
473 ret = system(cmd);
474 if (ret == -1 || !WIFEXITED(ret)) {
475 error_report("'%s' failed.", cmd);
476 } else if (WEXITSTATUS(ret)) {
477 error_report("'%s' failed. Error code: %d",
478 cmd, WEXITSTATUS(ret));
479 }
480 s->smb_dir[0] = '\0';
481 }
482 }
483
484 static int slirp_smb(SlirpState* s, const char *exported_dir,
485 struct in_addr vserver_addr)
486 {
487 static int instance;
488 char smb_conf[128];
489 char smb_cmdline[128];
490 FILE *f;
491
492 snprintf(s->smb_dir, sizeof(s->smb_dir), "/tmp/qemu-smb.%ld-%d",
493 (long)getpid(), instance++);
494 if (mkdir(s->smb_dir, 0700) < 0) {
495 error_report("could not create samba server dir '%s'", s->smb_dir);
496 return -1;
497 }
498 snprintf(smb_conf, sizeof(smb_conf), "%s/%s", s->smb_dir, "smb.conf");
499
500 f = fopen(smb_conf, "w");
501 if (!f) {
502 slirp_smb_cleanup(s);
503 error_report("could not create samba server configuration file '%s'",
504 smb_conf);
505 return -1;
506 }
507 fprintf(f,
508 "[global]\n"
509 "private dir=%s\n"
510 "smb ports=0\n"
511 "socket address=127.0.0.1\n"
512 "pid directory=%s\n"
513 "lock directory=%s\n"
514 "log file=%s/log.smbd\n"
515 "smb passwd file=%s/smbpasswd\n"
516 "security = share\n"
517 "[qemu]\n"
518 "path=%s\n"
519 "read only=no\n"
520 "guest ok=yes\n",
521 s->smb_dir,
522 s->smb_dir,
523 s->smb_dir,
524 s->smb_dir,
525 s->smb_dir,
526 exported_dir
527 );
528 fclose(f);
529
530 snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -s %s",
531 CONFIG_SMBD_COMMAND, smb_conf);
532
533 if (slirp_add_exec(s->slirp, 0, smb_cmdline, &vserver_addr, 139) < 0) {
534 slirp_smb_cleanup(s);
535 error_report("conflicting/invalid smbserver address");
536 return -1;
537 }
538 return 0;
539 }
540
541 /* automatic user mode samba server configuration (legacy interface) */
542 int net_slirp_smb(const char *exported_dir)
543 {
544 struct in_addr vserver_addr = { .s_addr = 0 };
545
546 if (legacy_smb_export) {
547 fprintf(stderr, "-smb given twice\n");
548 return -1;
549 }
550 legacy_smb_export = exported_dir;
551 if (!QTAILQ_EMPTY(&slirp_stacks)) {
552 return slirp_smb(QTAILQ_FIRST(&slirp_stacks), exported_dir,
553 vserver_addr);
554 }
555 return 0;
556 }
557
558 #endif /* !defined(_WIN32) */
559
560 struct GuestFwd {
561 CharDriverState *hd;
562 struct in_addr server;
563 int port;
564 Slirp *slirp;
565 };
566
567 static int guestfwd_can_read(void *opaque)
568 {
569 struct GuestFwd *fwd = opaque;
570 return slirp_socket_can_recv(fwd->slirp, fwd->server, fwd->port);
571 }
572
573 static void guestfwd_read(void *opaque, const uint8_t *buf, int size)
574 {
575 struct GuestFwd *fwd = opaque;
576 slirp_socket_recv(fwd->slirp, fwd->server, fwd->port, buf, size);
577 }
578
579 static int slirp_guestfwd(SlirpState *s, const char *config_str,
580 int legacy_format)
581 {
582 struct in_addr server = { .s_addr = 0 };
583 struct GuestFwd *fwd;
584 const char *p;
585 char buf[128];
586 char *end;
587 int port;
588
589 p = config_str;
590 if (legacy_format) {
591 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
592 goto fail_syntax;
593 }
594 } else {
595 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
596 goto fail_syntax;
597 }
598 if (strcmp(buf, "tcp") && buf[0] != '\0') {
599 goto fail_syntax;
600 }
601 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
602 goto fail_syntax;
603 }
604 if (buf[0] != '\0' && !inet_aton(buf, &server)) {
605 goto fail_syntax;
606 }
607 if (get_str_sep(buf, sizeof(buf), &p, '-') < 0) {
608 goto fail_syntax;
609 }
610 }
611 port = strtol(buf, &end, 10);
612 if (*end != '\0' || port < 1 || port > 65535) {
613 goto fail_syntax;
614 }
615
616 fwd = g_malloc(sizeof(struct GuestFwd));
617 snprintf(buf, sizeof(buf), "guestfwd.tcp.%d", port);
618 fwd->hd = qemu_chr_new(buf, p, NULL);
619 if (!fwd->hd) {
620 error_report("could not open guest forwarding device '%s'", buf);
621 g_free(fwd);
622 return -1;
623 }
624
625 if (slirp_add_exec(s->slirp, 3, fwd->hd, &server, port) < 0) {
626 error_report("conflicting/invalid host:port in guest forwarding "
627 "rule '%s'", config_str);
628 g_free(fwd);
629 return -1;
630 }
631 fwd->server = server;
632 fwd->port = port;
633 fwd->slirp = s->slirp;
634
635 qemu_chr_add_handlers(fwd->hd, guestfwd_can_read, guestfwd_read,
636 NULL, fwd);
637 return 0;
638
639 fail_syntax:
640 error_report("invalid guest forwarding rule '%s'", config_str);
641 return -1;
642 }
643
644 void do_info_usernet(Monitor *mon)
645 {
646 SlirpState *s;
647
648 QTAILQ_FOREACH(s, &slirp_stacks, entry) {
649 monitor_printf(mon, "VLAN %d (%s):\n",
650 s->nc.vlan ? s->nc.vlan->id : -1,
651 s->nc.name);
652 slirp_connection_info(s->slirp, mon);
653 }
654 }
655
656 static int net_init_slirp_configs(const char *name, const char *value, void *opaque)
657 {
658 struct slirp_config_str *config;
659
660 if (strcmp(name, "hostfwd") != 0 && strcmp(name, "guestfwd") != 0) {
661 return 0;
662 }
663
664 config = g_malloc0(sizeof(*config));
665
666 pstrcpy(config->str, sizeof(config->str), value);
667
668 if (!strcmp(name, "hostfwd")) {
669 config->flags = SLIRP_CFG_HOSTFWD;
670 }
671
672 config->next = slirp_configs;
673 slirp_configs = config;
674
675 return 0;
676 }
677
678 int net_init_slirp(QemuOpts *opts,
679 Monitor *mon,
680 const char *name,
681 VLANState *vlan)
682 {
683 struct slirp_config_str *config;
684 const char *vhost;
685 const char *vhostname;
686 const char *vdhcp_start;
687 const char *vnamesrv;
688 const char *tftp_export;
689 const char *bootfile;
690 const char *smb_export;
691 const char *vsmbsrv;
692 const char *restrict_opt;
693 char *vnet = NULL;
694 int restricted = 0;
695 int ret;
696
697 vhost = qemu_opt_get(opts, "host");
698 vhostname = qemu_opt_get(opts, "hostname");
699 vdhcp_start = qemu_opt_get(opts, "dhcpstart");
700 vnamesrv = qemu_opt_get(opts, "dns");
701 tftp_export = qemu_opt_get(opts, "tftp");
702 bootfile = qemu_opt_get(opts, "bootfile");
703 smb_export = qemu_opt_get(opts, "smb");
704 vsmbsrv = qemu_opt_get(opts, "smbserver");
705
706 restrict_opt = qemu_opt_get(opts, "restrict");
707 if (restrict_opt) {
708 if (!strcmp(restrict_opt, "on") ||
709 !strcmp(restrict_opt, "yes") || !strcmp(restrict_opt, "y")) {
710 restricted = 1;
711 } else if (strcmp(restrict_opt, "off") &&
712 strcmp(restrict_opt, "no") && strcmp(restrict_opt, "n")) {
713 error_report("invalid option: 'restrict=%s'", restrict_opt);
714 return -1;
715 }
716 }
717
718 if (qemu_opt_get(opts, "ip")) {
719 const char *ip = qemu_opt_get(opts, "ip");
720 int l = strlen(ip) + strlen("/24") + 1;
721
722 vnet = g_malloc(l);
723
724 /* emulate legacy ip= parameter */
725 pstrcpy(vnet, l, ip);
726 pstrcat(vnet, l, "/24");
727 }
728
729 if (qemu_opt_get(opts, "net")) {
730 if (vnet) {
731 g_free(vnet);
732 }
733 vnet = g_strdup(qemu_opt_get(opts, "net"));
734 }
735
736 qemu_opt_foreach(opts, net_init_slirp_configs, NULL, 0);
737
738 ret = net_slirp_init(vlan, "user", name, restricted, vnet, vhost,
739 vhostname, tftp_export, bootfile, vdhcp_start,
740 vnamesrv, smb_export, vsmbsrv);
741
742 while (slirp_configs) {
743 config = slirp_configs;
744 slirp_configs = config->next;
745 g_free(config);
746 }
747
748 g_free(vnet);
749
750 return ret;
751 }
752
753 int net_slirp_parse_legacy(QemuOptsList *opts_list, const char *optarg, int *ret)
754 {
755 if (strcmp(opts_list->name, "net") != 0 ||
756 strncmp(optarg, "channel,", strlen("channel,")) != 0) {
757 return 0;
758 }
759
760 /* handle legacy -net channel,port:chr */
761 optarg += strlen("channel,");
762
763 if (QTAILQ_EMPTY(&slirp_stacks)) {
764 struct slirp_config_str *config;
765
766 config = g_malloc(sizeof(*config));
767 pstrcpy(config->str, sizeof(config->str), optarg);
768 config->flags = SLIRP_CFG_LEGACY;
769 config->next = slirp_configs;
770 slirp_configs = config;
771 *ret = 0;
772 } else {
773 *ret = slirp_guestfwd(QTAILQ_FIRST(&slirp_stacks), optarg, 1);
774 }
775
776 return 1;
777 }
778