i386/kvm: introduce tsc_is_stable_and_known()
[qemu/ar7.git] / net / slirp.c
blob01ed21c006b5afda38f3408267585a7ae538133d
1 /*
2 * QEMU System Emulator
4 * Copyright (c) 2003-2008 Fabrice Bellard
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:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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.
24 #include "qemu/osdep.h"
25 #include "net/slirp.h"
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/error-report.h"
37 #include "qemu/sockets.h"
38 #include "slirp/libslirp.h"
39 #include "slirp/ip6.h"
40 #include "chardev/char-fe.h"
41 #include "sysemu/sysemu.h"
42 #include "qemu/cutils.h"
43 #include "qapi/error.h"
45 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
47 const char *p, *p1;
48 int len;
49 p = *pp;
50 p1 = strchr(p, sep);
51 if (!p1)
52 return -1;
53 len = p1 - p;
54 p1++;
55 if (buf_size > 0) {
56 if (len > buf_size - 1)
57 len = buf_size - 1;
58 memcpy(buf, p, len);
59 buf[len] = '\0';
61 *pp = p1;
62 return 0;
65 /* slirp network adapter */
67 #define SLIRP_CFG_HOSTFWD 1
68 #define SLIRP_CFG_LEGACY 2
70 struct slirp_config_str {
71 struct slirp_config_str *next;
72 int flags;
73 char str[1024];
74 int legacy_format;
77 typedef struct SlirpState {
78 NetClientState nc;
79 QTAILQ_ENTRY(SlirpState) entry;
80 Slirp *slirp;
81 Notifier exit_notifier;
82 #ifndef _WIN32
83 gchar *smb_dir;
84 #endif
85 } SlirpState;
87 static struct slirp_config_str *slirp_configs;
88 const char *legacy_tftp_prefix;
89 const char *legacy_bootp_filename;
90 static QTAILQ_HEAD(slirp_stacks, SlirpState) slirp_stacks =
91 QTAILQ_HEAD_INITIALIZER(slirp_stacks);
93 static int slirp_hostfwd(SlirpState *s, const char *redir_str,
94 int legacy_format, Error **errp);
95 static int slirp_guestfwd(SlirpState *s, const char *config_str,
96 int legacy_format, Error **errp);
98 #ifndef _WIN32
99 static const char *legacy_smb_export;
101 static int slirp_smb(SlirpState *s, const char *exported_dir,
102 struct in_addr vserver_addr, Error **errp);
103 static void slirp_smb_cleanup(SlirpState *s);
104 #else
105 static inline void slirp_smb_cleanup(SlirpState *s) { }
106 #endif
108 void slirp_output(void *opaque, const uint8_t *pkt, int pkt_len)
110 SlirpState *s = opaque;
112 qemu_send_packet(&s->nc, pkt, pkt_len);
115 static ssize_t net_slirp_receive(NetClientState *nc, const uint8_t *buf, size_t size)
117 SlirpState *s = DO_UPCAST(SlirpState, nc, nc);
119 slirp_input(s->slirp, buf, size);
121 return size;
124 static void slirp_smb_exit(Notifier *n, void *data)
126 SlirpState *s = container_of(n, SlirpState, exit_notifier);
127 slirp_smb_cleanup(s);
130 static void net_slirp_cleanup(NetClientState *nc)
132 SlirpState *s = DO_UPCAST(SlirpState, nc, nc);
134 slirp_cleanup(s->slirp);
135 if (s->exit_notifier.notify) {
136 qemu_remove_exit_notifier(&s->exit_notifier);
138 slirp_smb_cleanup(s);
139 QTAILQ_REMOVE(&slirp_stacks, s, entry);
142 static NetClientInfo net_slirp_info = {
143 .type = NET_CLIENT_DRIVER_USER,
144 .size = sizeof(SlirpState),
145 .receive = net_slirp_receive,
146 .cleanup = net_slirp_cleanup,
149 static int net_slirp_init(NetClientState *peer, const char *model,
150 const char *name, int restricted,
151 bool ipv4, const char *vnetwork, const char *vhost,
152 bool ipv6, const char *vprefix6, int vprefix6_len,
153 const char *vhost6,
154 const char *vhostname, const char *tftp_export,
155 const char *bootfile, const char *vdhcp_start,
156 const char *vnameserver, const char *vnameserver6,
157 const char *smb_export, const char *vsmbserver,
158 const char **dnssearch, Error **errp)
160 /* default settings according to historic slirp */
161 struct in_addr net = { .s_addr = htonl(0x0a000200) }; /* 10.0.2.0 */
162 struct in_addr mask = { .s_addr = htonl(0xffffff00) }; /* 255.255.255.0 */
163 struct in_addr host = { .s_addr = htonl(0x0a000202) }; /* 10.0.2.2 */
164 struct in_addr dhcp = { .s_addr = htonl(0x0a00020f) }; /* 10.0.2.15 */
165 struct in_addr dns = { .s_addr = htonl(0x0a000203) }; /* 10.0.2.3 */
166 struct in6_addr ip6_prefix;
167 struct in6_addr ip6_host;
168 struct in6_addr ip6_dns;
169 #ifndef _WIN32
170 struct in_addr smbsrv = { .s_addr = 0 };
171 #endif
172 NetClientState *nc;
173 SlirpState *s;
174 char buf[20];
175 uint32_t addr;
176 int shift;
177 char *end;
178 struct slirp_config_str *config;
180 if (!ipv4 && (vnetwork || vhost || vnameserver)) {
181 error_setg(errp, "IPv4 disabled but netmask/host/dns provided");
182 return -1;
185 if (!ipv6 && (vprefix6 || vhost6 || vnameserver6)) {
186 error_setg(errp, "IPv6 disabled but prefix/host6/dns6 provided");
187 return -1;
190 if (!ipv4 && !ipv6) {
191 /* It doesn't make sense to disable both */
192 error_setg(errp, "IPv4 and IPv6 disabled");
193 return -1;
196 if (!tftp_export) {
197 tftp_export = legacy_tftp_prefix;
199 if (!bootfile) {
200 bootfile = legacy_bootp_filename;
203 if (vnetwork) {
204 if (get_str_sep(buf, sizeof(buf), &vnetwork, '/') < 0) {
205 if (!inet_aton(vnetwork, &net)) {
206 error_setg(errp, "Failed to parse netmask");
207 return -1;
209 addr = ntohl(net.s_addr);
210 if (!(addr & 0x80000000)) {
211 mask.s_addr = htonl(0xff000000); /* class A */
212 } else if ((addr & 0xfff00000) == 0xac100000) {
213 mask.s_addr = htonl(0xfff00000); /* priv. 172.16.0.0/12 */
214 } else if ((addr & 0xc0000000) == 0x80000000) {
215 mask.s_addr = htonl(0xffff0000); /* class B */
216 } else if ((addr & 0xffff0000) == 0xc0a80000) {
217 mask.s_addr = htonl(0xffff0000); /* priv. 192.168.0.0/16 */
218 } else if ((addr & 0xffff0000) == 0xc6120000) {
219 mask.s_addr = htonl(0xfffe0000); /* tests 198.18.0.0/15 */
220 } else if ((addr & 0xe0000000) == 0xe0000000) {
221 mask.s_addr = htonl(0xffffff00); /* class C */
222 } else {
223 mask.s_addr = htonl(0xfffffff0); /* multicast/reserved */
225 } else {
226 if (!inet_aton(buf, &net)) {
227 error_setg(errp, "Failed to parse netmask");
228 return -1;
230 shift = strtol(vnetwork, &end, 10);
231 if (*end != '\0') {
232 if (!inet_aton(vnetwork, &mask)) {
233 error_setg(errp,
234 "Failed to parse netmask (trailing chars)");
235 return -1;
237 } else if (shift < 4 || shift > 32) {
238 error_setg(errp,
239 "Invalid netmask provided (must be in range 4-32)");
240 return -1;
241 } else {
242 mask.s_addr = htonl(0xffffffff << (32 - shift));
245 net.s_addr &= mask.s_addr;
246 host.s_addr = net.s_addr | (htonl(0x0202) & ~mask.s_addr);
247 dhcp.s_addr = net.s_addr | (htonl(0x020f) & ~mask.s_addr);
248 dns.s_addr = net.s_addr | (htonl(0x0203) & ~mask.s_addr);
251 if (vhost && !inet_aton(vhost, &host)) {
252 error_setg(errp, "Failed to parse host");
253 return -1;
255 if ((host.s_addr & mask.s_addr) != net.s_addr) {
256 error_setg(errp, "Host doesn't belong to network");
257 return -1;
260 if (vnameserver && !inet_aton(vnameserver, &dns)) {
261 error_setg(errp, "Failed to parse DNS");
262 return -1;
264 if ((dns.s_addr & mask.s_addr) != net.s_addr) {
265 error_setg(errp, "DNS doesn't belong to network");
266 return -1;
268 if (dns.s_addr == host.s_addr) {
269 error_setg(errp, "DNS must be different from host");
270 return -1;
273 if (vdhcp_start && !inet_aton(vdhcp_start, &dhcp)) {
274 error_setg(errp, "Failed to parse DHCP start address");
275 return -1;
277 if ((dhcp.s_addr & mask.s_addr) != net.s_addr) {
278 error_setg(errp, "DHCP doesn't belong to network");
279 return -1;
281 if (dhcp.s_addr == host.s_addr || dhcp.s_addr == dns.s_addr) {
282 error_setg(errp, "DNS must be different from host and DNS");
283 return -1;
286 #ifndef _WIN32
287 if (vsmbserver && !inet_aton(vsmbserver, &smbsrv)) {
288 error_setg(errp, "Failed to parse SMB address");
289 return -1;
291 #endif
293 #if defined(_WIN32) && (_WIN32_WINNT < 0x0600)
294 /* No inet_pton helper before Vista... */
295 if (vprefix6) {
296 /* Unsupported */
297 error_setg(errp, "IPv6 prefix not supported");
298 return -1;
300 memset(&ip6_prefix, 0, sizeof(ip6_prefix));
301 ip6_prefix.s6_addr[0] = 0xfe;
302 ip6_prefix.s6_addr[1] = 0xc0;
303 #else
304 if (!vprefix6) {
305 vprefix6 = "fec0::";
307 if (!inet_pton(AF_INET6, vprefix6, &ip6_prefix)) {
308 error_setg(errp, "Failed to parse IPv6 prefix");
309 return -1;
311 #endif
313 if (!vprefix6_len) {
314 vprefix6_len = 64;
316 if (vprefix6_len < 0 || vprefix6_len > 126) {
317 error_setg(errp,
318 "Invalid prefix provided (prefix len must be in range 0-126");
319 return -1;
322 if (vhost6) {
323 #if defined(_WIN32) && (_WIN32_WINNT < 0x0600)
324 error_setg(errp, "IPv6 host not supported");
325 return -1;
326 #else
327 if (!inet_pton(AF_INET6, vhost6, &ip6_host)) {
328 error_setg(errp, "Failed to parse IPv6 host");
329 return -1;
331 if (!in6_equal_net(&ip6_prefix, &ip6_host, vprefix6_len)) {
332 error_setg(errp, "IPv6 Host doesn't belong to network");
333 return -1;
335 #endif
336 } else {
337 ip6_host = ip6_prefix;
338 ip6_host.s6_addr[15] |= 2;
341 if (vnameserver6) {
342 #if defined(_WIN32) && (_WIN32_WINNT < 0x0600)
343 error_setg(errp, "IPv6 DNS not supported");
344 return -1;
345 #else
346 if (!inet_pton(AF_INET6, vnameserver6, &ip6_dns)) {
347 error_setg(errp, "Failed to parse IPv6 DNS");
348 return -1;
350 if (!in6_equal_net(&ip6_prefix, &ip6_dns, vprefix6_len)) {
351 error_setg(errp, "IPv6 DNS doesn't belong to network");
352 return -1;
354 #endif
355 } else {
356 ip6_dns = ip6_prefix;
357 ip6_dns.s6_addr[15] |= 3;
361 nc = qemu_new_net_client(&net_slirp_info, peer, model, name);
363 snprintf(nc->info_str, sizeof(nc->info_str),
364 "net=%s,restrict=%s", inet_ntoa(net),
365 restricted ? "on" : "off");
367 s = DO_UPCAST(SlirpState, nc, nc);
369 s->slirp = slirp_init(restricted, ipv4, net, mask, host,
370 ipv6, ip6_prefix, vprefix6_len, ip6_host,
371 vhostname, tftp_export, bootfile, dhcp,
372 dns, ip6_dns, dnssearch, s);
373 QTAILQ_INSERT_TAIL(&slirp_stacks, s, entry);
375 for (config = slirp_configs; config; config = config->next) {
376 if (config->flags & SLIRP_CFG_HOSTFWD) {
377 if (slirp_hostfwd(s, config->str,
378 config->flags & SLIRP_CFG_LEGACY, errp) < 0) {
379 goto error;
381 } else {
382 if (slirp_guestfwd(s, config->str,
383 config->flags & SLIRP_CFG_LEGACY, errp) < 0) {
384 goto error;
388 #ifndef _WIN32
389 if (!smb_export) {
390 smb_export = legacy_smb_export;
392 if (smb_export) {
393 if (slirp_smb(s, smb_export, smbsrv, errp) < 0) {
394 goto error;
397 #endif
399 s->exit_notifier.notify = slirp_smb_exit;
400 qemu_add_exit_notifier(&s->exit_notifier);
401 return 0;
403 error:
404 qemu_del_net_client(nc);
405 return -1;
408 static SlirpState *slirp_lookup(Monitor *mon, const char *vlan,
409 const char *stack)
412 if (vlan) {
413 NetClientState *nc;
414 nc = net_hub_find_client_by_name(strtol(vlan, NULL, 0), stack);
415 if (!nc) {
416 monitor_printf(mon, "unrecognized (vlan-id, stackname) pair\n");
417 return NULL;
419 if (strcmp(nc->model, "user")) {
420 monitor_printf(mon, "invalid device specified\n");
421 return NULL;
423 return DO_UPCAST(SlirpState, nc, nc);
424 } else {
425 if (QTAILQ_EMPTY(&slirp_stacks)) {
426 monitor_printf(mon, "user mode network stack not in use\n");
427 return NULL;
429 return QTAILQ_FIRST(&slirp_stacks);
433 void hmp_hostfwd_remove(Monitor *mon, const QDict *qdict)
435 struct in_addr host_addr = { .s_addr = INADDR_ANY };
436 int host_port;
437 char buf[256];
438 const char *src_str, *p;
439 SlirpState *s;
440 int is_udp = 0;
441 int err;
442 const char *arg1 = qdict_get_str(qdict, "arg1");
443 const char *arg2 = qdict_get_try_str(qdict, "arg2");
444 const char *arg3 = qdict_get_try_str(qdict, "arg3");
446 if (arg2) {
447 s = slirp_lookup(mon, arg1, arg2);
448 src_str = arg3;
449 } else {
450 s = slirp_lookup(mon, NULL, NULL);
451 src_str = arg1;
453 if (!s) {
454 return;
457 p = src_str;
458 if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
459 goto fail_syntax;
462 if (!strcmp(buf, "tcp") || buf[0] == '\0') {
463 is_udp = 0;
464 } else if (!strcmp(buf, "udp")) {
465 is_udp = 1;
466 } else {
467 goto fail_syntax;
470 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
471 goto fail_syntax;
473 if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
474 goto fail_syntax;
477 host_port = atoi(p);
479 err = slirp_remove_hostfwd(s->slirp, is_udp, host_addr, host_port);
481 monitor_printf(mon, "host forwarding rule for %s %s\n", src_str,
482 err ? "not found" : "removed");
483 return;
485 fail_syntax:
486 monitor_printf(mon, "invalid format\n");
489 static int slirp_hostfwd(SlirpState *s, const char *redir_str,
490 int legacy_format, Error **errp)
492 struct in_addr host_addr = { .s_addr = INADDR_ANY };
493 struct in_addr guest_addr = { .s_addr = 0 };
494 int host_port, guest_port;
495 const char *p;
496 char buf[256];
497 int is_udp;
498 char *end;
500 p = redir_str;
501 if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
502 goto fail_syntax;
504 if (!strcmp(buf, "tcp") || buf[0] == '\0') {
505 is_udp = 0;
506 } else if (!strcmp(buf, "udp")) {
507 is_udp = 1;
508 } else {
509 goto fail_syntax;
512 if (!legacy_format) {
513 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
514 goto fail_syntax;
516 if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
517 goto fail_syntax;
521 if (get_str_sep(buf, sizeof(buf), &p, legacy_format ? ':' : '-') < 0) {
522 goto fail_syntax;
524 host_port = strtol(buf, &end, 0);
525 if (*end != '\0' || host_port < 0 || host_port > 65535) {
526 goto fail_syntax;
529 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
530 goto fail_syntax;
532 if (buf[0] != '\0' && !inet_aton(buf, &guest_addr)) {
533 goto fail_syntax;
536 guest_port = strtol(p, &end, 0);
537 if (*end != '\0' || guest_port < 1 || guest_port > 65535) {
538 goto fail_syntax;
541 if (slirp_add_hostfwd(s->slirp, is_udp, host_addr, host_port, guest_addr,
542 guest_port) < 0) {
543 error_setg(errp, "Could not set up host forwarding rule '%s'",
544 redir_str);
545 return -1;
547 return 0;
549 fail_syntax:
550 error_setg(errp, "Invalid host forwarding rule '%s'", redir_str);
551 return -1;
554 void hmp_hostfwd_add(Monitor *mon, const QDict *qdict)
556 const char *redir_str;
557 SlirpState *s;
558 const char *arg1 = qdict_get_str(qdict, "arg1");
559 const char *arg2 = qdict_get_try_str(qdict, "arg2");
560 const char *arg3 = qdict_get_try_str(qdict, "arg3");
562 if (arg2) {
563 s = slirp_lookup(mon, arg1, arg2);
564 redir_str = arg3;
565 } else {
566 s = slirp_lookup(mon, NULL, NULL);
567 redir_str = arg1;
569 if (s) {
570 Error *err = NULL;
571 if (slirp_hostfwd(s, redir_str, 0, &err) < 0) {
572 error_report_err(err);
578 int net_slirp_redir(const char *redir_str)
580 struct slirp_config_str *config;
581 Error *err = NULL;
582 int res;
584 if (QTAILQ_EMPTY(&slirp_stacks)) {
585 config = g_malloc(sizeof(*config));
586 pstrcpy(config->str, sizeof(config->str), redir_str);
587 config->flags = SLIRP_CFG_HOSTFWD | SLIRP_CFG_LEGACY;
588 config->next = slirp_configs;
589 slirp_configs = config;
590 return 0;
593 res = slirp_hostfwd(QTAILQ_FIRST(&slirp_stacks), redir_str, 1, &err);
594 if (res < 0) {
595 error_report_err(err);
597 return res;
600 #ifndef _WIN32
602 /* automatic user mode samba server configuration */
603 static void slirp_smb_cleanup(SlirpState *s)
605 int ret;
607 if (s->smb_dir) {
608 gchar *cmd = g_strdup_printf("rm -rf %s", s->smb_dir);
609 ret = system(cmd);
610 if (ret == -1 || !WIFEXITED(ret)) {
611 error_report("'%s' failed.", cmd);
612 } else if (WEXITSTATUS(ret)) {
613 error_report("'%s' failed. Error code: %d",
614 cmd, WEXITSTATUS(ret));
616 g_free(cmd);
617 g_free(s->smb_dir);
618 s->smb_dir = NULL;
622 static int slirp_smb(SlirpState* s, const char *exported_dir,
623 struct in_addr vserver_addr, Error **errp)
625 char *smb_conf;
626 char *smb_cmdline;
627 struct passwd *passwd;
628 FILE *f;
630 passwd = getpwuid(geteuid());
631 if (!passwd) {
632 error_setg(errp, "Failed to retrieve user name");
633 return -1;
636 if (access(CONFIG_SMBD_COMMAND, F_OK)) {
637 error_setg(errp, "Could not find '%s', please install it",
638 CONFIG_SMBD_COMMAND);
639 return -1;
642 if (access(exported_dir, R_OK | X_OK)) {
643 error_setg(errp, "Error accessing shared directory '%s': %s",
644 exported_dir, strerror(errno));
645 return -1;
648 s->smb_dir = g_dir_make_tmp("qemu-smb.XXXXXX", NULL);
649 if (!s->smb_dir) {
650 error_setg(errp, "Could not create samba server dir");
651 return -1;
653 smb_conf = g_strdup_printf("%s/%s", s->smb_dir, "smb.conf");
655 f = fopen(smb_conf, "w");
656 if (!f) {
657 slirp_smb_cleanup(s);
658 error_setg(errp,
659 "Could not create samba server configuration file '%s'",
660 smb_conf);
661 g_free(smb_conf);
662 return -1;
664 fprintf(f,
665 "[global]\n"
666 "private dir=%s\n"
667 "interfaces=127.0.0.1\n"
668 "bind interfaces only=yes\n"
669 "pid directory=%s\n"
670 "lock directory=%s\n"
671 "state directory=%s\n"
672 "cache directory=%s\n"
673 "ncalrpc dir=%s/ncalrpc\n"
674 "log file=%s/log.smbd\n"
675 "smb passwd file=%s/smbpasswd\n"
676 "security = user\n"
677 "map to guest = Bad User\n"
678 "load printers = no\n"
679 "printing = bsd\n"
680 "disable spoolss = yes\n"
681 "usershare max shares = 0\n"
682 "[qemu]\n"
683 "path=%s\n"
684 "read only=no\n"
685 "guest ok=yes\n"
686 "force user=%s\n",
687 s->smb_dir,
688 s->smb_dir,
689 s->smb_dir,
690 s->smb_dir,
691 s->smb_dir,
692 s->smb_dir,
693 s->smb_dir,
694 s->smb_dir,
695 exported_dir,
696 passwd->pw_name
698 fclose(f);
700 smb_cmdline = g_strdup_printf("%s -l %s -s %s",
701 CONFIG_SMBD_COMMAND, s->smb_dir, smb_conf);
702 g_free(smb_conf);
704 if (slirp_add_exec(s->slirp, 0, smb_cmdline, &vserver_addr, 139) < 0 ||
705 slirp_add_exec(s->slirp, 0, smb_cmdline, &vserver_addr, 445) < 0) {
706 slirp_smb_cleanup(s);
707 g_free(smb_cmdline);
708 error_setg(errp, "Conflicting/invalid smbserver address");
709 return -1;
711 g_free(smb_cmdline);
712 return 0;
715 /* automatic user mode samba server configuration (legacy interface) */
716 int net_slirp_smb(const char *exported_dir)
718 struct in_addr vserver_addr = { .s_addr = 0 };
720 if (legacy_smb_export) {
721 fprintf(stderr, "-smb given twice\n");
722 return -1;
724 legacy_smb_export = exported_dir;
725 if (!QTAILQ_EMPTY(&slirp_stacks)) {
726 Error *err = NULL;
727 int res = slirp_smb(QTAILQ_FIRST(&slirp_stacks), exported_dir,
728 vserver_addr, &err);
729 if (res < 0) {
730 error_report_err(err);
732 return res;
734 return 0;
737 #endif /* !defined(_WIN32) */
739 struct GuestFwd {
740 CharBackend hd;
741 struct in_addr server;
742 int port;
743 Slirp *slirp;
746 static int guestfwd_can_read(void *opaque)
748 struct GuestFwd *fwd = opaque;
749 return slirp_socket_can_recv(fwd->slirp, fwd->server, fwd->port);
752 static void guestfwd_read(void *opaque, const uint8_t *buf, int size)
754 struct GuestFwd *fwd = opaque;
755 slirp_socket_recv(fwd->slirp, fwd->server, fwd->port, buf, size);
758 static int slirp_guestfwd(SlirpState *s, const char *config_str,
759 int legacy_format, Error **errp)
761 struct in_addr server = { .s_addr = 0 };
762 struct GuestFwd *fwd;
763 const char *p;
764 char buf[128];
765 char *end;
766 int port;
768 p = config_str;
769 if (legacy_format) {
770 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
771 goto fail_syntax;
773 } else {
774 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
775 goto fail_syntax;
777 if (strcmp(buf, "tcp") && buf[0] != '\0') {
778 goto fail_syntax;
780 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
781 goto fail_syntax;
783 if (buf[0] != '\0' && !inet_aton(buf, &server)) {
784 goto fail_syntax;
786 if (get_str_sep(buf, sizeof(buf), &p, '-') < 0) {
787 goto fail_syntax;
790 port = strtol(buf, &end, 10);
791 if (*end != '\0' || port < 1 || port > 65535) {
792 goto fail_syntax;
795 snprintf(buf, sizeof(buf), "guestfwd.tcp.%d", port);
797 if ((strlen(p) > 4) && !strncmp(p, "cmd:", 4)) {
798 if (slirp_add_exec(s->slirp, 0, &p[4], &server, port) < 0) {
799 error_setg(errp, "Conflicting/invalid host:port in guest "
800 "forwarding rule '%s'", config_str);
801 return -1;
803 } else {
804 Error *err = NULL;
805 Chardev *chr = qemu_chr_new(buf, p);
807 if (!chr) {
808 error_setg(errp, "Could not open guest forwarding device '%s'",
809 buf);
810 return -1;
813 fwd = g_new(struct GuestFwd, 1);
814 qemu_chr_fe_init(&fwd->hd, chr, &err);
815 if (err) {
816 error_propagate(errp, err);
817 g_free(fwd);
818 return -1;
821 if (slirp_add_exec(s->slirp, 3, &fwd->hd, &server, port) < 0) {
822 error_setg(errp, "Conflicting/invalid host:port in guest "
823 "forwarding rule '%s'", config_str);
824 g_free(fwd);
825 return -1;
827 fwd->server = server;
828 fwd->port = port;
829 fwd->slirp = s->slirp;
831 qemu_chr_fe_set_handlers(&fwd->hd, guestfwd_can_read, guestfwd_read,
832 NULL, NULL, fwd, NULL, true);
834 return 0;
836 fail_syntax:
837 error_setg(errp, "Invalid guest forwarding rule '%s'", config_str);
838 return -1;
841 void hmp_info_usernet(Monitor *mon, const QDict *qdict)
843 SlirpState *s;
845 QTAILQ_FOREACH(s, &slirp_stacks, entry) {
846 int id;
847 bool got_vlan_id = net_hub_id_for_client(&s->nc, &id) == 0;
848 monitor_printf(mon, "VLAN %d (%s):\n",
849 got_vlan_id ? id : -1,
850 s->nc.name);
851 slirp_connection_info(s->slirp, mon);
855 static void
856 net_init_slirp_configs(const StringList *fwd, int flags)
858 while (fwd) {
859 struct slirp_config_str *config;
861 config = g_malloc0(sizeof(*config));
862 pstrcpy(config->str, sizeof(config->str), fwd->value->str);
863 config->flags = flags;
864 config->next = slirp_configs;
865 slirp_configs = config;
867 fwd = fwd->next;
871 static const char **slirp_dnssearch(const StringList *dnsname)
873 const StringList *c = dnsname;
874 size_t i = 0, num_opts = 0;
875 const char **ret;
877 while (c) {
878 num_opts++;
879 c = c->next;
882 if (num_opts == 0) {
883 return NULL;
886 ret = g_malloc((num_opts + 1) * sizeof(*ret));
887 c = dnsname;
888 while (c) {
889 ret[i++] = c->value->str;
890 c = c->next;
892 ret[i] = NULL;
893 return ret;
896 int net_init_slirp(const Netdev *netdev, const char *name,
897 NetClientState *peer, Error **errp)
899 struct slirp_config_str *config;
900 char *vnet;
901 int ret;
902 const NetdevUserOptions *user;
903 const char **dnssearch;
904 bool ipv4 = true, ipv6 = true;
906 assert(netdev->type == NET_CLIENT_DRIVER_USER);
907 user = &netdev->u.user;
909 if ((user->has_ipv6 && user->ipv6 && !user->has_ipv4) ||
910 (user->has_ipv4 && !user->ipv4)) {
911 ipv4 = 0;
913 if ((user->has_ipv4 && user->ipv4 && !user->has_ipv6) ||
914 (user->has_ipv6 && !user->ipv6)) {
915 ipv6 = 0;
918 vnet = user->has_net ? g_strdup(user->net) :
919 user->has_ip ? g_strdup_printf("%s/24", user->ip) :
920 NULL;
922 dnssearch = slirp_dnssearch(user->dnssearch);
924 /* all optional fields are initialized to "all bits zero" */
926 net_init_slirp_configs(user->hostfwd, SLIRP_CFG_HOSTFWD);
927 net_init_slirp_configs(user->guestfwd, 0);
929 ret = net_slirp_init(peer, "user", name, user->q_restrict,
930 ipv4, vnet, user->host,
931 ipv6, user->ipv6_prefix, user->ipv6_prefixlen,
932 user->ipv6_host, user->hostname, user->tftp,
933 user->bootfile, user->dhcpstart,
934 user->dns, user->ipv6_dns, user->smb,
935 user->smbserver, dnssearch, errp);
937 while (slirp_configs) {
938 config = slirp_configs;
939 slirp_configs = config->next;
940 g_free(config);
943 g_free(vnet);
944 g_free(dnssearch);
946 return ret;
949 int net_slirp_parse_legacy(QemuOptsList *opts_list, const char *optarg, int *ret)
951 if (strcmp(opts_list->name, "net") != 0 ||
952 strncmp(optarg, "channel,", strlen("channel,")) != 0) {
953 return 0;
956 error_report("The '-net channel' option is deprecated. "
957 "Please use '-netdev user,guestfwd=...' instead.");
959 /* handle legacy -net channel,port:chr */
960 optarg += strlen("channel,");
962 if (QTAILQ_EMPTY(&slirp_stacks)) {
963 struct slirp_config_str *config;
965 config = g_malloc(sizeof(*config));
966 pstrcpy(config->str, sizeof(config->str), optarg);
967 config->flags = SLIRP_CFG_LEGACY;
968 config->next = slirp_configs;
969 slirp_configs = config;
970 *ret = 0;
971 } else {
972 Error *err = NULL;
973 *ret = slirp_guestfwd(QTAILQ_FIRST(&slirp_stacks), optarg, 1, &err);
974 if (*ret < 0) {
975 error_report_err(err);
979 return 1;