mips: Set the CP0.Config3.DSP and CP0.Config3.DSP2P bits
[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 <pwd.h>
30 #include <sys/wait.h>
31 #endif
32 #include "net/net.h"
33 #include "clients.h"
34 #include "hub.h"
35 #include "monitor/monitor.h"
36 #include "qemu/sockets.h"
37 #include "slirp/libslirp.h"
38 #include "sysemu/char.h"
39
40 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
41 {
42 const char *p, *p1;
43 int len;
44 p = *pp;
45 p1 = strchr(p, sep);
46 if (!p1)
47 return -1;
48 len = p1 - p;
49 p1++;
50 if (buf_size > 0) {
51 if (len > buf_size - 1)
52 len = buf_size - 1;
53 memcpy(buf, p, len);
54 buf[len] = '\0';
55 }
56 *pp = p1;
57 return 0;
58 }
59
60 /* slirp network adapter */
61
62 #define SLIRP_CFG_HOSTFWD 1
63 #define SLIRP_CFG_LEGACY 2
64
65 struct slirp_config_str {
66 struct slirp_config_str *next;
67 int flags;
68 char str[1024];
69 int legacy_format;
70 };
71
72 typedef struct SlirpState {
73 NetClientState nc;
74 QTAILQ_ENTRY(SlirpState) entry;
75 Slirp *slirp;
76 #ifndef _WIN32
77 char smb_dir[128];
78 #endif
79 } SlirpState;
80
81 static struct slirp_config_str *slirp_configs;
82 const char *legacy_tftp_prefix;
83 const char *legacy_bootp_filename;
84 static QTAILQ_HEAD(slirp_stacks, SlirpState) slirp_stacks =
85 QTAILQ_HEAD_INITIALIZER(slirp_stacks);
86
87 static int slirp_hostfwd(SlirpState *s, const char *redir_str,
88 int legacy_format);
89 static int slirp_guestfwd(SlirpState *s, const char *config_str,
90 int legacy_format);
91
92 #ifndef _WIN32
93 static const char *legacy_smb_export;
94
95 static int slirp_smb(SlirpState *s, const char *exported_dir,
96 struct in_addr vserver_addr);
97 static void slirp_smb_cleanup(SlirpState *s);
98 #else
99 static inline void slirp_smb_cleanup(SlirpState *s) { }
100 #endif
101
102 void slirp_output(void *opaque, const uint8_t *pkt, int pkt_len)
103 {
104 SlirpState *s = opaque;
105
106 qemu_send_packet(&s->nc, pkt, pkt_len);
107 }
108
109 static ssize_t net_slirp_receive(NetClientState *nc, const uint8_t *buf, size_t size)
110 {
111 SlirpState *s = DO_UPCAST(SlirpState, nc, nc);
112
113 slirp_input(s->slirp, buf, size);
114
115 return size;
116 }
117
118 static void net_slirp_cleanup(NetClientState *nc)
119 {
120 SlirpState *s = DO_UPCAST(SlirpState, nc, nc);
121
122 slirp_cleanup(s->slirp);
123 slirp_smb_cleanup(s);
124 QTAILQ_REMOVE(&slirp_stacks, s, entry);
125 }
126
127 static NetClientInfo net_slirp_info = {
128 .type = NET_CLIENT_OPTIONS_KIND_USER,
129 .size = sizeof(SlirpState),
130 .receive = net_slirp_receive,
131 .cleanup = net_slirp_cleanup,
132 };
133
134 static int net_slirp_init(NetClientState *peer, const char *model,
135 const char *name, int restricted,
136 const char *vnetwork, const char *vhost,
137 const char *vhostname, const char *tftp_export,
138 const char *bootfile, const char *vdhcp_start,
139 const char *vnameserver, const char *smb_export,
140 const char *vsmbserver, const char **dnssearch)
141 {
142 /* default settings according to historic slirp */
143 struct in_addr net = { .s_addr = htonl(0x0a000200) }; /* 10.0.2.0 */
144 struct in_addr mask = { .s_addr = htonl(0xffffff00) }; /* 255.255.255.0 */
145 struct in_addr host = { .s_addr = htonl(0x0a000202) }; /* 10.0.2.2 */
146 struct in_addr dhcp = { .s_addr = htonl(0x0a00020f) }; /* 10.0.2.15 */
147 struct in_addr dns = { .s_addr = htonl(0x0a000203) }; /* 10.0.2.3 */
148 #ifndef _WIN32
149 struct in_addr smbsrv = { .s_addr = 0 };
150 #endif
151 NetClientState *nc;
152 SlirpState *s;
153 char buf[20];
154 uint32_t addr;
155 int shift;
156 char *end;
157 struct slirp_config_str *config;
158
159 if (!tftp_export) {
160 tftp_export = legacy_tftp_prefix;
161 }
162 if (!bootfile) {
163 bootfile = legacy_bootp_filename;
164 }
165
166 if (vnetwork) {
167 if (get_str_sep(buf, sizeof(buf), &vnetwork, '/') < 0) {
168 if (!inet_aton(vnetwork, &net)) {
169 return -1;
170 }
171 addr = ntohl(net.s_addr);
172 if (!(addr & 0x80000000)) {
173 mask.s_addr = htonl(0xff000000); /* class A */
174 } else if ((addr & 0xfff00000) == 0xac100000) {
175 mask.s_addr = htonl(0xfff00000); /* priv. 172.16.0.0/12 */
176 } else if ((addr & 0xc0000000) == 0x80000000) {
177 mask.s_addr = htonl(0xffff0000); /* class B */
178 } else if ((addr & 0xffff0000) == 0xc0a80000) {
179 mask.s_addr = htonl(0xffff0000); /* priv. 192.168.0.0/16 */
180 } else if ((addr & 0xffff0000) == 0xc6120000) {
181 mask.s_addr = htonl(0xfffe0000); /* tests 198.18.0.0/15 */
182 } else if ((addr & 0xe0000000) == 0xe0000000) {
183 mask.s_addr = htonl(0xffffff00); /* class C */
184 } else {
185 mask.s_addr = htonl(0xfffffff0); /* multicast/reserved */
186 }
187 } else {
188 if (!inet_aton(buf, &net)) {
189 return -1;
190 }
191 shift = strtol(vnetwork, &end, 10);
192 if (*end != '\0') {
193 if (!inet_aton(vnetwork, &mask)) {
194 return -1;
195 }
196 } else if (shift < 4 || shift > 32) {
197 return -1;
198 } else {
199 mask.s_addr = htonl(0xffffffff << (32 - shift));
200 }
201 }
202 net.s_addr &= mask.s_addr;
203 host.s_addr = net.s_addr | (htonl(0x0202) & ~mask.s_addr);
204 dhcp.s_addr = net.s_addr | (htonl(0x020f) & ~mask.s_addr);
205 dns.s_addr = net.s_addr | (htonl(0x0203) & ~mask.s_addr);
206 }
207
208 if (vhost && !inet_aton(vhost, &host)) {
209 return -1;
210 }
211 if ((host.s_addr & mask.s_addr) != net.s_addr) {
212 return -1;
213 }
214
215 if (vnameserver && !inet_aton(vnameserver, &dns)) {
216 return -1;
217 }
218 if ((dns.s_addr & mask.s_addr) != net.s_addr ||
219 dns.s_addr == host.s_addr) {
220 return -1;
221 }
222
223 if (vdhcp_start && !inet_aton(vdhcp_start, &dhcp)) {
224 return -1;
225 }
226 if ((dhcp.s_addr & mask.s_addr) != net.s_addr ||
227 dhcp.s_addr == host.s_addr || dhcp.s_addr == dns.s_addr) {
228 return -1;
229 }
230
231 #ifndef _WIN32
232 if (vsmbserver && !inet_aton(vsmbserver, &smbsrv)) {
233 return -1;
234 }
235 #endif
236
237 nc = qemu_new_net_client(&net_slirp_info, peer, model, name);
238
239 snprintf(nc->info_str, sizeof(nc->info_str),
240 "net=%s,restrict=%s", inet_ntoa(net),
241 restricted ? "on" : "off");
242
243 s = DO_UPCAST(SlirpState, nc, nc);
244
245 s->slirp = slirp_init(restricted, net, mask, host, vhostname,
246 tftp_export, bootfile, dhcp, dns, dnssearch, s);
247 QTAILQ_INSERT_TAIL(&slirp_stacks, s, entry);
248
249 for (config = slirp_configs; config; config = config->next) {
250 if (config->flags & SLIRP_CFG_HOSTFWD) {
251 if (slirp_hostfwd(s, config->str,
252 config->flags & SLIRP_CFG_LEGACY) < 0)
253 goto error;
254 } else {
255 if (slirp_guestfwd(s, config->str,
256 config->flags & SLIRP_CFG_LEGACY) < 0)
257 goto error;
258 }
259 }
260 #ifndef _WIN32
261 if (!smb_export) {
262 smb_export = legacy_smb_export;
263 }
264 if (smb_export) {
265 if (slirp_smb(s, smb_export, smbsrv) < 0)
266 goto error;
267 }
268 #endif
269
270 return 0;
271
272 error:
273 qemu_del_net_client(nc);
274 return -1;
275 }
276
277 static SlirpState *slirp_lookup(Monitor *mon, const char *vlan,
278 const char *stack)
279 {
280
281 if (vlan) {
282 NetClientState *nc;
283 nc = net_hub_find_client_by_name(strtol(vlan, NULL, 0), stack);
284 if (!nc) {
285 monitor_printf(mon, "unrecognized (vlan-id, stackname) pair\n");
286 return NULL;
287 }
288 if (strcmp(nc->model, "user")) {
289 monitor_printf(mon, "invalid device specified\n");
290 return NULL;
291 }
292 return DO_UPCAST(SlirpState, nc, nc);
293 } else {
294 if (QTAILQ_EMPTY(&slirp_stacks)) {
295 monitor_printf(mon, "user mode network stack not in use\n");
296 return NULL;
297 }
298 return QTAILQ_FIRST(&slirp_stacks);
299 }
300 }
301
302 void net_slirp_hostfwd_remove(Monitor *mon, const QDict *qdict)
303 {
304 struct in_addr host_addr = { .s_addr = INADDR_ANY };
305 int host_port;
306 char buf[256];
307 const char *src_str, *p;
308 SlirpState *s;
309 int is_udp = 0;
310 int err;
311 const char *arg1 = qdict_get_str(qdict, "arg1");
312 const char *arg2 = qdict_get_try_str(qdict, "arg2");
313 const char *arg3 = qdict_get_try_str(qdict, "arg3");
314
315 if (arg2) {
316 s = slirp_lookup(mon, arg1, arg2);
317 src_str = arg3;
318 } else {
319 s = slirp_lookup(mon, NULL, NULL);
320 src_str = arg1;
321 }
322 if (!s) {
323 return;
324 }
325
326 p = src_str;
327 if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
328 goto fail_syntax;
329 }
330
331 if (!strcmp(buf, "tcp") || buf[0] == '\0') {
332 is_udp = 0;
333 } else if (!strcmp(buf, "udp")) {
334 is_udp = 1;
335 } else {
336 goto fail_syntax;
337 }
338
339 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
340 goto fail_syntax;
341 }
342 if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
343 goto fail_syntax;
344 }
345
346 host_port = atoi(p);
347
348 err = slirp_remove_hostfwd(s->slirp, is_udp, host_addr, host_port);
349
350 monitor_printf(mon, "host forwarding rule for %s %s\n", src_str,
351 err ? "not found" : "removed");
352 return;
353
354 fail_syntax:
355 monitor_printf(mon, "invalid format\n");
356 }
357
358 static int slirp_hostfwd(SlirpState *s, const char *redir_str,
359 int legacy_format)
360 {
361 struct in_addr host_addr = { .s_addr = INADDR_ANY };
362 struct in_addr guest_addr = { .s_addr = 0 };
363 int host_port, guest_port;
364 const char *p;
365 char buf[256];
366 int is_udp;
367 char *end;
368
369 p = redir_str;
370 if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
371 goto fail_syntax;
372 }
373 if (!strcmp(buf, "tcp") || buf[0] == '\0') {
374 is_udp = 0;
375 } else if (!strcmp(buf, "udp")) {
376 is_udp = 1;
377 } else {
378 goto fail_syntax;
379 }
380
381 if (!legacy_format) {
382 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
383 goto fail_syntax;
384 }
385 if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
386 goto fail_syntax;
387 }
388 }
389
390 if (get_str_sep(buf, sizeof(buf), &p, legacy_format ? ':' : '-') < 0) {
391 goto fail_syntax;
392 }
393 host_port = strtol(buf, &end, 0);
394 if (*end != '\0' || host_port < 1 || host_port > 65535) {
395 goto fail_syntax;
396 }
397
398 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
399 goto fail_syntax;
400 }
401 if (buf[0] != '\0' && !inet_aton(buf, &guest_addr)) {
402 goto fail_syntax;
403 }
404
405 guest_port = strtol(p, &end, 0);
406 if (*end != '\0' || guest_port < 1 || guest_port > 65535) {
407 goto fail_syntax;
408 }
409
410 if (slirp_add_hostfwd(s->slirp, is_udp, host_addr, host_port, guest_addr,
411 guest_port) < 0) {
412 error_report("could not set up host forwarding rule '%s'",
413 redir_str);
414 return -1;
415 }
416 return 0;
417
418 fail_syntax:
419 error_report("invalid host forwarding rule '%s'", redir_str);
420 return -1;
421 }
422
423 void net_slirp_hostfwd_add(Monitor *mon, const QDict *qdict)
424 {
425 const char *redir_str;
426 SlirpState *s;
427 const char *arg1 = qdict_get_str(qdict, "arg1");
428 const char *arg2 = qdict_get_try_str(qdict, "arg2");
429 const char *arg3 = qdict_get_try_str(qdict, "arg3");
430
431 if (arg2) {
432 s = slirp_lookup(mon, arg1, arg2);
433 redir_str = arg3;
434 } else {
435 s = slirp_lookup(mon, NULL, NULL);
436 redir_str = arg1;
437 }
438 if (s) {
439 slirp_hostfwd(s, redir_str, 0);
440 }
441
442 }
443
444 int net_slirp_redir(const char *redir_str)
445 {
446 struct slirp_config_str *config;
447
448 if (QTAILQ_EMPTY(&slirp_stacks)) {
449 config = g_malloc(sizeof(*config));
450 pstrcpy(config->str, sizeof(config->str), redir_str);
451 config->flags = SLIRP_CFG_HOSTFWD | SLIRP_CFG_LEGACY;
452 config->next = slirp_configs;
453 slirp_configs = config;
454 return 0;
455 }
456
457 return slirp_hostfwd(QTAILQ_FIRST(&slirp_stacks), redir_str, 1);
458 }
459
460 #ifndef _WIN32
461
462 /* automatic user mode samba server configuration */
463 static void slirp_smb_cleanup(SlirpState *s)
464 {
465 char cmd[128];
466 int ret;
467
468 if (s->smb_dir[0] != '\0') {
469 snprintf(cmd, sizeof(cmd), "rm -rf %s", s->smb_dir);
470 ret = system(cmd);
471 if (ret == -1 || !WIFEXITED(ret)) {
472 error_report("'%s' failed.", cmd);
473 } else if (WEXITSTATUS(ret)) {
474 error_report("'%s' failed. Error code: %d",
475 cmd, WEXITSTATUS(ret));
476 }
477 s->smb_dir[0] = '\0';
478 }
479 }
480
481 static int slirp_smb(SlirpState* s, const char *exported_dir,
482 struct in_addr vserver_addr)
483 {
484 static int instance;
485 char smb_conf[128];
486 char smb_cmdline[128];
487 struct passwd *passwd;
488 FILE *f;
489
490 passwd = getpwuid(geteuid());
491 if (!passwd) {
492 error_report("failed to retrieve user name");
493 return -1;
494 }
495
496 if (access(CONFIG_SMBD_COMMAND, F_OK)) {
497 error_report("could not find '%s', please install it",
498 CONFIG_SMBD_COMMAND);
499 return -1;
500 }
501
502 if (access(exported_dir, R_OK | X_OK)) {
503 error_report("error accessing shared directory '%s': %s",
504 exported_dir, strerror(errno));
505 return -1;
506 }
507
508 snprintf(s->smb_dir, sizeof(s->smb_dir), "/tmp/qemu-smb.%ld-%d",
509 (long)getpid(), instance++);
510 if (mkdir(s->smb_dir, 0700) < 0) {
511 error_report("could not create samba server dir '%s'", s->smb_dir);
512 return -1;
513 }
514 snprintf(smb_conf, sizeof(smb_conf), "%s/%s", s->smb_dir, "smb.conf");
515
516 f = fopen(smb_conf, "w");
517 if (!f) {
518 slirp_smb_cleanup(s);
519 error_report("could not create samba server configuration file '%s'",
520 smb_conf);
521 return -1;
522 }
523 fprintf(f,
524 "[global]\n"
525 "private dir=%s\n"
526 "socket address=127.0.0.1\n"
527 "pid directory=%s\n"
528 "lock directory=%s\n"
529 "state directory=%s\n"
530 "ncalrpc dir=%s/ncalrpc\n"
531 "log file=%s/log.smbd\n"
532 "smb passwd file=%s/smbpasswd\n"
533 "security = user\n"
534 "map to guest = Bad User\n"
535 "[qemu]\n"
536 "path=%s\n"
537 "read only=no\n"
538 "guest ok=yes\n"
539 "force user=%s\n",
540 s->smb_dir,
541 s->smb_dir,
542 s->smb_dir,
543 s->smb_dir,
544 s->smb_dir,
545 s->smb_dir,
546 s->smb_dir,
547 exported_dir,
548 passwd->pw_name
549 );
550 fclose(f);
551
552 snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -l %s -s %s",
553 CONFIG_SMBD_COMMAND, s->smb_dir, smb_conf);
554
555 if (slirp_add_exec(s->slirp, 0, smb_cmdline, &vserver_addr, 139) < 0 ||
556 slirp_add_exec(s->slirp, 0, smb_cmdline, &vserver_addr, 445) < 0) {
557 slirp_smb_cleanup(s);
558 error_report("conflicting/invalid smbserver address");
559 return -1;
560 }
561 return 0;
562 }
563
564 /* automatic user mode samba server configuration (legacy interface) */
565 int net_slirp_smb(const char *exported_dir)
566 {
567 struct in_addr vserver_addr = { .s_addr = 0 };
568
569 if (legacy_smb_export) {
570 fprintf(stderr, "-smb given twice\n");
571 return -1;
572 }
573 legacy_smb_export = exported_dir;
574 if (!QTAILQ_EMPTY(&slirp_stacks)) {
575 return slirp_smb(QTAILQ_FIRST(&slirp_stacks), exported_dir,
576 vserver_addr);
577 }
578 return 0;
579 }
580
581 #endif /* !defined(_WIN32) */
582
583 struct GuestFwd {
584 CharDriverState *hd;
585 struct in_addr server;
586 int port;
587 Slirp *slirp;
588 };
589
590 static int guestfwd_can_read(void *opaque)
591 {
592 struct GuestFwd *fwd = opaque;
593 return slirp_socket_can_recv(fwd->slirp, fwd->server, fwd->port);
594 }
595
596 static void guestfwd_read(void *opaque, const uint8_t *buf, int size)
597 {
598 struct GuestFwd *fwd = opaque;
599 slirp_socket_recv(fwd->slirp, fwd->server, fwd->port, buf, size);
600 }
601
602 static int slirp_guestfwd(SlirpState *s, const char *config_str,
603 int legacy_format)
604 {
605 struct in_addr server = { .s_addr = 0 };
606 struct GuestFwd *fwd;
607 const char *p;
608 char buf[128];
609 char *end;
610 int port;
611
612 p = config_str;
613 if (legacy_format) {
614 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
615 goto fail_syntax;
616 }
617 } else {
618 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
619 goto fail_syntax;
620 }
621 if (strcmp(buf, "tcp") && buf[0] != '\0') {
622 goto fail_syntax;
623 }
624 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
625 goto fail_syntax;
626 }
627 if (buf[0] != '\0' && !inet_aton(buf, &server)) {
628 goto fail_syntax;
629 }
630 if (get_str_sep(buf, sizeof(buf), &p, '-') < 0) {
631 goto fail_syntax;
632 }
633 }
634 port = strtol(buf, &end, 10);
635 if (*end != '\0' || port < 1 || port > 65535) {
636 goto fail_syntax;
637 }
638
639 fwd = g_malloc(sizeof(struct GuestFwd));
640 snprintf(buf, sizeof(buf), "guestfwd.tcp.%d", port);
641
642 if ((strlen(p) > 4) && !strncmp(p, "cmd:", 4)) {
643 if (slirp_add_exec(s->slirp, 0, &p[4], &server, port) < 0) {
644 error_report("conflicting/invalid host:port in guest forwarding "
645 "rule '%s'", config_str);
646 g_free(fwd);
647 return -1;
648 }
649 } else {
650 fwd->hd = qemu_chr_new(buf, p, NULL);
651 if (!fwd->hd) {
652 error_report("could not open guest forwarding device '%s'", buf);
653 g_free(fwd);
654 return -1;
655 }
656
657 if (slirp_add_exec(s->slirp, 3, fwd->hd, &server, port) < 0) {
658 error_report("conflicting/invalid host:port in guest forwarding "
659 "rule '%s'", config_str);
660 g_free(fwd);
661 return -1;
662 }
663 fwd->server = server;
664 fwd->port = port;
665 fwd->slirp = s->slirp;
666
667 qemu_chr_fe_claim_no_fail(fwd->hd);
668 qemu_chr_add_handlers(fwd->hd, guestfwd_can_read, guestfwd_read,
669 NULL, fwd);
670 }
671 return 0;
672
673 fail_syntax:
674 error_report("invalid guest forwarding rule '%s'", config_str);
675 return -1;
676 }
677
678 void do_info_usernet(Monitor *mon, const QDict *qdict)
679 {
680 SlirpState *s;
681
682 QTAILQ_FOREACH(s, &slirp_stacks, entry) {
683 int id;
684 bool got_vlan_id = net_hub_id_for_client(&s->nc, &id) == 0;
685 monitor_printf(mon, "VLAN %d (%s):\n",
686 got_vlan_id ? id : -1,
687 s->nc.name);
688 slirp_connection_info(s->slirp, mon);
689 }
690 }
691
692 static void
693 net_init_slirp_configs(const StringList *fwd, int flags)
694 {
695 while (fwd) {
696 struct slirp_config_str *config;
697
698 config = g_malloc0(sizeof(*config));
699 pstrcpy(config->str, sizeof(config->str), fwd->value->str);
700 config->flags = flags;
701 config->next = slirp_configs;
702 slirp_configs = config;
703
704 fwd = fwd->next;
705 }
706 }
707
708 static const char **slirp_dnssearch(const StringList *dnsname)
709 {
710 const StringList *c = dnsname;
711 size_t i = 0, num_opts = 0;
712 const char **ret;
713
714 while (c) {
715 num_opts++;
716 c = c->next;
717 }
718
719 if (num_opts == 0) {
720 return NULL;
721 }
722
723 ret = g_malloc((num_opts + 1) * sizeof(*ret));
724 c = dnsname;
725 while (c) {
726 ret[i++] = c->value->str;
727 c = c->next;
728 }
729 ret[i] = NULL;
730 return ret;
731 }
732
733 int net_init_slirp(const NetClientOptions *opts, const char *name,
734 NetClientState *peer)
735 {
736 struct slirp_config_str *config;
737 char *vnet;
738 int ret;
739 const NetdevUserOptions *user;
740 const char **dnssearch;
741
742 assert(opts->kind == NET_CLIENT_OPTIONS_KIND_USER);
743 user = opts->user;
744
745 vnet = user->has_net ? g_strdup(user->net) :
746 user->has_ip ? g_strdup_printf("%s/24", user->ip) :
747 NULL;
748
749 dnssearch = slirp_dnssearch(user->dnssearch);
750
751 /* all optional fields are initialized to "all bits zero" */
752
753 net_init_slirp_configs(user->hostfwd, SLIRP_CFG_HOSTFWD);
754 net_init_slirp_configs(user->guestfwd, 0);
755
756 ret = net_slirp_init(peer, "user", name, user->q_restrict, vnet,
757 user->host, user->hostname, user->tftp,
758 user->bootfile, user->dhcpstart, user->dns, user->smb,
759 user->smbserver, dnssearch);
760
761 while (slirp_configs) {
762 config = slirp_configs;
763 slirp_configs = config->next;
764 g_free(config);
765 }
766
767 g_free(vnet);
768 g_free(dnssearch);
769
770 return ret;
771 }
772
773 int net_slirp_parse_legacy(QemuOptsList *opts_list, const char *optarg, int *ret)
774 {
775 if (strcmp(opts_list->name, "net") != 0 ||
776 strncmp(optarg, "channel,", strlen("channel,")) != 0) {
777 return 0;
778 }
779
780 /* handle legacy -net channel,port:chr */
781 optarg += strlen("channel,");
782
783 if (QTAILQ_EMPTY(&slirp_stacks)) {
784 struct slirp_config_str *config;
785
786 config = g_malloc(sizeof(*config));
787 pstrcpy(config->str, sizeof(config->str), optarg);
788 config->flags = SLIRP_CFG_LEGACY;
789 config->next = slirp_configs;
790 slirp_configs = config;
791 *ret = 0;
792 } else {
793 *ret = slirp_guestfwd(QTAILQ_FIRST(&slirp_stacks), optarg, 1);
794 }
795
796 return 1;
797 }
798