Merge remote-tracking branch 'qemu/master'
[qemu/ar7.git] / net / slirp.c
blob28207b6614ade9d0831ae34302d59ee1ac98b945
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 "sysemu/char.h"
41 #include "sysemu/sysemu.h"
42 #include "qemu/cutils.h"
44 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
46 const char *p, *p1;
47 int len;
48 p = *pp;
49 p1 = strchr(p, sep);
50 if (!p1)
51 return -1;
52 len = p1 - p;
53 p1++;
54 if (buf_size > 0) {
55 if (len > buf_size - 1)
56 len = buf_size - 1;
57 memcpy(buf, p, len);
58 buf[len] = '\0';
60 *pp = p1;
61 return 0;
64 /* slirp network adapter */
66 #define SLIRP_CFG_HOSTFWD 1
67 #define SLIRP_CFG_LEGACY 2
69 struct slirp_config_str {
70 struct slirp_config_str *next;
71 int flags;
72 char str[1024];
73 int legacy_format;
76 typedef struct SlirpState {
77 NetClientState nc;
78 QTAILQ_ENTRY(SlirpState) entry;
79 Slirp *slirp;
80 Notifier exit_notifier;
81 #ifndef _WIN32
82 char smb_dir[128];
83 #endif
84 } SlirpState;
86 static struct slirp_config_str *slirp_configs;
87 const char *legacy_tftp_prefix;
88 const char *legacy_bootp_filename;
89 static QTAILQ_HEAD(slirp_stacks, SlirpState) slirp_stacks =
90 QTAILQ_HEAD_INITIALIZER(slirp_stacks);
92 static int slirp_hostfwd(SlirpState *s, const char *redir_str,
93 int legacy_format);
94 static int slirp_guestfwd(SlirpState *s, const char *config_str,
95 int legacy_format);
97 #ifndef _WIN32
98 static const char *legacy_smb_export;
100 static int slirp_smb(SlirpState *s, const char *exported_dir,
101 struct in_addr vserver_addr);
102 static void slirp_smb_cleanup(SlirpState *s);
103 #else
104 static inline void slirp_smb_cleanup(SlirpState *s) { }
105 #endif
107 void slirp_output(void *opaque, const uint8_t *pkt, int pkt_len)
109 SlirpState *s = opaque;
111 qemu_send_packet(&s->nc, pkt, pkt_len);
114 static ssize_t net_slirp_receive(NetClientState *nc, const uint8_t *buf, size_t size)
116 SlirpState *s = DO_UPCAST(SlirpState, nc, nc);
118 slirp_input(s->slirp, buf, size);
120 return size;
123 static void slirp_smb_exit(Notifier *n, void *data)
125 SlirpState *s = container_of(n, SlirpState, exit_notifier);
126 slirp_smb_cleanup(s);
129 static void net_slirp_cleanup(NetClientState *nc)
131 SlirpState *s = DO_UPCAST(SlirpState, nc, nc);
133 slirp_cleanup(s->slirp);
134 qemu_remove_exit_notifier(&s->exit_notifier);
135 slirp_smb_cleanup(s);
136 QTAILQ_REMOVE(&slirp_stacks, s, entry);
139 static NetClientInfo net_slirp_info = {
140 .type = NET_CLIENT_OPTIONS_KIND_USER,
141 .size = sizeof(SlirpState),
142 .receive = net_slirp_receive,
143 .cleanup = net_slirp_cleanup,
146 static int net_slirp_init(NetClientState *peer, const char *model,
147 const char *name, int restricted,
148 bool ipv4, const char *vnetwork, const char *vhost,
149 bool ipv6, const char *vprefix6, int vprefix6_len,
150 const char *vhost6,
151 const char *vhostname, const char *tftp_export,
152 const char *bootfile, const char *vdhcp_start,
153 const char *vnameserver, const char *vnameserver6,
154 const char *smb_export, const char *vsmbserver,
155 const char **dnssearch)
157 /* default settings according to historic slirp */
158 struct in_addr net = { .s_addr = htonl(0x0a000200) }; /* 10.0.2.0 */
159 struct in_addr mask = { .s_addr = htonl(0xffffff00) }; /* 255.255.255.0 */
160 struct in_addr host = { .s_addr = htonl(0x0a000202) }; /* 10.0.2.2 */
161 struct in_addr dhcp = { .s_addr = htonl(0x0a00020f) }; /* 10.0.2.15 */
162 struct in_addr dns = { .s_addr = htonl(0x0a000203) }; /* 10.0.2.3 */
163 struct in6_addr ip6_prefix;
164 struct in6_addr ip6_host;
165 struct in6_addr ip6_dns;
166 #ifndef _WIN32
167 struct in_addr smbsrv = { .s_addr = 0 };
168 #endif
169 NetClientState *nc;
170 SlirpState *s;
171 char buf[20];
172 uint32_t addr;
173 int shift;
174 char *end;
175 struct slirp_config_str *config;
177 if (!ipv4 && (vnetwork || vhost || vnameserver)) {
178 return -1;
181 if (!ipv6 && (vprefix6 || vhost6 || vnameserver6)) {
182 return -1;
185 if (!ipv4 && !ipv6) {
186 /* It doesn't make sense to disable both */
187 return -1;
190 if (!tftp_export) {
191 tftp_export = legacy_tftp_prefix;
193 if (!bootfile) {
194 bootfile = legacy_bootp_filename;
197 if (vnetwork) {
198 if (get_str_sep(buf, sizeof(buf), &vnetwork, '/') < 0) {
199 if (!inet_aton(vnetwork, &net)) {
200 return -1;
202 addr = ntohl(net.s_addr);
203 if (!(addr & 0x80000000)) {
204 mask.s_addr = htonl(0xff000000); /* class A */
205 } else if ((addr & 0xfff00000) == 0xac100000) {
206 mask.s_addr = htonl(0xfff00000); /* priv. 172.16.0.0/12 */
207 } else if ((addr & 0xc0000000) == 0x80000000) {
208 mask.s_addr = htonl(0xffff0000); /* class B */
209 } else if ((addr & 0xffff0000) == 0xc0a80000) {
210 mask.s_addr = htonl(0xffff0000); /* priv. 192.168.0.0/16 */
211 } else if ((addr & 0xffff0000) == 0xc6120000) {
212 mask.s_addr = htonl(0xfffe0000); /* tests 198.18.0.0/15 */
213 } else if ((addr & 0xe0000000) == 0xe0000000) {
214 mask.s_addr = htonl(0xffffff00); /* class C */
215 } else {
216 mask.s_addr = htonl(0xfffffff0); /* multicast/reserved */
218 } else {
219 if (!inet_aton(buf, &net)) {
220 return -1;
222 shift = strtol(vnetwork, &end, 10);
223 if (*end != '\0') {
224 if (!inet_aton(vnetwork, &mask)) {
225 return -1;
227 } else if (shift < 4 || shift > 32) {
228 return -1;
229 } else {
230 mask.s_addr = htonl(0xffffffff << (32 - shift));
233 net.s_addr &= mask.s_addr;
234 host.s_addr = net.s_addr | (htonl(0x0202) & ~mask.s_addr);
235 dhcp.s_addr = net.s_addr | (htonl(0x020f) & ~mask.s_addr);
236 dns.s_addr = net.s_addr | (htonl(0x0203) & ~mask.s_addr);
239 if (vhost && !inet_aton(vhost, &host)) {
240 return -1;
242 if ((host.s_addr & mask.s_addr) != net.s_addr) {
243 return -1;
246 if (vnameserver && !inet_aton(vnameserver, &dns)) {
247 return -1;
249 if ((dns.s_addr & mask.s_addr) != net.s_addr ||
250 dns.s_addr == host.s_addr) {
251 return -1;
254 if (vdhcp_start && !inet_aton(vdhcp_start, &dhcp)) {
255 return -1;
257 if ((dhcp.s_addr & mask.s_addr) != net.s_addr ||
258 dhcp.s_addr == host.s_addr || dhcp.s_addr == dns.s_addr) {
259 return -1;
262 #ifndef _WIN32
263 if (vsmbserver && !inet_aton(vsmbserver, &smbsrv)) {
264 return -1;
266 #endif
268 #if defined(_WIN32) && (_WIN32_WINNT < 0x0600)
269 /* No inet_pton helper before Vista... */
270 if (vprefix6) {
271 /* Unsupported */
272 return -1;
274 memset(&ip6_prefix, 0, sizeof(ip6_prefix));
275 ip6_prefix.s6_addr[0] = 0xfe;
276 ip6_prefix.s6_addr[1] = 0xc0;
277 #else
278 if (!vprefix6) {
279 vprefix6 = "fec0::";
281 if (!inet_pton(AF_INET6, vprefix6, &ip6_prefix)) {
282 return -1;
284 #endif
286 if (!vprefix6_len) {
287 vprefix6_len = 64;
289 if (vprefix6_len < 0 || vprefix6_len > 126) {
290 return -1;
293 if (vhost6) {
294 #if defined(_WIN32) && (_WIN32_WINNT < 0x0600)
295 return -1;
296 #else
297 if (!inet_pton(AF_INET6, vhost6, &ip6_host)) {
298 return -1;
300 if (!in6_equal_net(&ip6_prefix, &ip6_host, vprefix6_len)) {
301 return -1;
303 #endif
304 } else {
305 ip6_host = ip6_prefix;
306 ip6_host.s6_addr[15] |= 2;
309 if (vnameserver6) {
310 #if defined(_WIN32) && (_WIN32_WINNT < 0x0600)
311 return -1;
312 #else
313 if (!inet_pton(AF_INET6, vnameserver6, &ip6_dns)) {
314 return -1;
316 if (!in6_equal_net(&ip6_prefix, &ip6_dns, vprefix6_len)) {
317 return -1;
319 #endif
320 } else {
321 ip6_dns = ip6_prefix;
322 ip6_dns.s6_addr[15] |= 3;
326 nc = qemu_new_net_client(&net_slirp_info, peer, model, name);
328 snprintf(nc->info_str, sizeof(nc->info_str),
329 "net=%s,restrict=%s", inet_ntoa(net),
330 restricted ? "on" : "off");
332 s = DO_UPCAST(SlirpState, nc, nc);
334 s->slirp = slirp_init(restricted, ipv4, net, mask, host,
335 ipv6, ip6_prefix, vprefix6_len, ip6_host,
336 vhostname, tftp_export, bootfile, dhcp,
337 dns, ip6_dns, dnssearch, s);
338 QTAILQ_INSERT_TAIL(&slirp_stacks, s, entry);
340 for (config = slirp_configs; config; config = config->next) {
341 if (config->flags & SLIRP_CFG_HOSTFWD) {
342 if (slirp_hostfwd(s, config->str,
343 config->flags & SLIRP_CFG_LEGACY) < 0)
344 goto error;
345 } else {
346 if (slirp_guestfwd(s, config->str,
347 config->flags & SLIRP_CFG_LEGACY) < 0)
348 goto error;
351 #ifndef _WIN32
352 if (!smb_export) {
353 smb_export = legacy_smb_export;
355 if (smb_export) {
356 if (slirp_smb(s, smb_export, smbsrv) < 0)
357 goto error;
359 #endif
361 s->exit_notifier.notify = slirp_smb_exit;
362 qemu_add_exit_notifier(&s->exit_notifier);
363 return 0;
365 error:
366 qemu_del_net_client(nc);
367 return -1;
370 static SlirpState *slirp_lookup(Monitor *mon, const char *vlan,
371 const char *stack)
374 if (vlan) {
375 NetClientState *nc;
376 nc = net_hub_find_client_by_name(strtol(vlan, NULL, 0), stack);
377 if (!nc) {
378 monitor_printf(mon, "unrecognized (vlan-id, stackname) pair\n");
379 return NULL;
381 if (strcmp(nc->model, "user")) {
382 monitor_printf(mon, "invalid device specified\n");
383 return NULL;
385 return DO_UPCAST(SlirpState, nc, nc);
386 } else {
387 if (QTAILQ_EMPTY(&slirp_stacks)) {
388 monitor_printf(mon, "user mode network stack not in use\n");
389 return NULL;
391 return QTAILQ_FIRST(&slirp_stacks);
395 void hmp_hostfwd_remove(Monitor *mon, const QDict *qdict)
397 struct in_addr host_addr = { .s_addr = INADDR_ANY };
398 int host_port;
399 char buf[256];
400 const char *src_str, *p;
401 SlirpState *s;
402 int is_udp = 0;
403 int err;
404 const char *arg1 = qdict_get_str(qdict, "arg1");
405 const char *arg2 = qdict_get_try_str(qdict, "arg2");
406 const char *arg3 = qdict_get_try_str(qdict, "arg3");
408 if (arg2) {
409 s = slirp_lookup(mon, arg1, arg2);
410 src_str = arg3;
411 } else {
412 s = slirp_lookup(mon, NULL, NULL);
413 src_str = arg1;
415 if (!s) {
416 return;
419 p = src_str;
420 if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
421 goto fail_syntax;
424 if (!strcmp(buf, "tcp") || buf[0] == '\0') {
425 is_udp = 0;
426 } else if (!strcmp(buf, "udp")) {
427 is_udp = 1;
428 } else {
429 goto fail_syntax;
432 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
433 goto fail_syntax;
435 if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
436 goto fail_syntax;
439 host_port = atoi(p);
441 err = slirp_remove_hostfwd(s->slirp, is_udp, host_addr, host_port);
443 monitor_printf(mon, "host forwarding rule for %s %s\n", src_str,
444 err ? "not found" : "removed");
445 return;
447 fail_syntax:
448 monitor_printf(mon, "invalid format\n");
451 static int slirp_hostfwd(SlirpState *s, const char *redir_str,
452 int legacy_format)
454 struct in_addr host_addr = { .s_addr = INADDR_ANY };
455 struct in_addr guest_addr = { .s_addr = 0 };
456 int host_port, guest_port;
457 const char *p;
458 char buf[256];
459 int is_udp;
460 char *end;
462 p = redir_str;
463 if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
464 goto fail_syntax;
466 if (!strcmp(buf, "tcp") || buf[0] == '\0') {
467 is_udp = 0;
468 } else if (!strcmp(buf, "udp")) {
469 is_udp = 1;
470 } else {
471 goto fail_syntax;
474 if (!legacy_format) {
475 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
476 goto fail_syntax;
478 if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
479 goto fail_syntax;
483 if (get_str_sep(buf, sizeof(buf), &p, legacy_format ? ':' : '-') < 0) {
484 goto fail_syntax;
486 host_port = strtol(buf, &end, 0);
487 if (*end != '\0' || host_port < 1 || host_port > 65535) {
488 goto fail_syntax;
491 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
492 goto fail_syntax;
494 if (buf[0] != '\0' && !inet_aton(buf, &guest_addr)) {
495 goto fail_syntax;
498 guest_port = strtol(p, &end, 0);
499 if (*end != '\0' || guest_port < 1 || guest_port > 65535) {
500 goto fail_syntax;
503 if (slirp_add_hostfwd(s->slirp, is_udp, host_addr, host_port, guest_addr,
504 guest_port) < 0) {
505 error_report("could not set up host forwarding rule '%s'",
506 redir_str);
507 return -1;
509 return 0;
511 fail_syntax:
512 error_report("invalid host forwarding rule '%s'", redir_str);
513 return -1;
516 void hmp_hostfwd_add(Monitor *mon, const QDict *qdict)
518 const char *redir_str;
519 SlirpState *s;
520 const char *arg1 = qdict_get_str(qdict, "arg1");
521 const char *arg2 = qdict_get_try_str(qdict, "arg2");
522 const char *arg3 = qdict_get_try_str(qdict, "arg3");
524 if (arg2) {
525 s = slirp_lookup(mon, arg1, arg2);
526 redir_str = arg3;
527 } else {
528 s = slirp_lookup(mon, NULL, NULL);
529 redir_str = arg1;
531 if (s) {
532 slirp_hostfwd(s, redir_str, 0);
537 int net_slirp_redir(const char *redir_str)
539 struct slirp_config_str *config;
541 if (QTAILQ_EMPTY(&slirp_stacks)) {
542 config = g_malloc(sizeof(*config));
543 pstrcpy(config->str, sizeof(config->str), redir_str);
544 config->flags = SLIRP_CFG_HOSTFWD | SLIRP_CFG_LEGACY;
545 config->next = slirp_configs;
546 slirp_configs = config;
547 return 0;
550 return slirp_hostfwd(QTAILQ_FIRST(&slirp_stacks), redir_str, 1);
553 #ifndef _WIN32
555 /* automatic user mode samba server configuration */
556 static void slirp_smb_cleanup(SlirpState *s)
558 char cmd[128];
559 int ret;
561 if (s->smb_dir[0] != '\0') {
562 snprintf(cmd, sizeof(cmd), "rm -rf %s", s->smb_dir);
563 ret = system(cmd);
564 if (ret == -1 || !WIFEXITED(ret)) {
565 error_report("'%s' failed.", cmd);
566 } else if (WEXITSTATUS(ret)) {
567 error_report("'%s' failed. Error code: %d",
568 cmd, WEXITSTATUS(ret));
570 s->smb_dir[0] = '\0';
574 static int slirp_smb(SlirpState* s, const char *exported_dir,
575 struct in_addr vserver_addr)
577 char smb_conf[128];
578 char smb_cmdline[128];
579 struct passwd *passwd;
580 FILE *f;
582 passwd = getpwuid(geteuid());
583 if (!passwd) {
584 error_report("failed to retrieve user name");
585 return -1;
588 if (access(CONFIG_SMBD_COMMAND, F_OK)) {
589 error_report("could not find '%s', please install it",
590 CONFIG_SMBD_COMMAND);
591 return -1;
594 if (access(exported_dir, R_OK | X_OK)) {
595 error_report("error accessing shared directory '%s': %s",
596 exported_dir, strerror(errno));
597 return -1;
600 snprintf(s->smb_dir, sizeof(s->smb_dir), "/tmp/qemu-smb.XXXXXX");
601 if (!mkdtemp(s->smb_dir)) {
602 error_report("could not create samba server dir '%s'", s->smb_dir);
603 s->smb_dir[0] = 0;
604 return -1;
606 snprintf(smb_conf, sizeof(smb_conf), "%s/%s", s->smb_dir, "smb.conf");
608 f = fopen(smb_conf, "w");
609 if (!f) {
610 slirp_smb_cleanup(s);
611 error_report("could not create samba server configuration file '%s'",
612 smb_conf);
613 return -1;
615 fprintf(f,
616 "[global]\n"
617 "private dir=%s\n"
618 "interfaces=127.0.0.1\n"
619 "bind interfaces only=yes\n"
620 "pid directory=%s\n"
621 "lock directory=%s\n"
622 "state directory=%s\n"
623 "cache directory=%s\n"
624 "ncalrpc dir=%s/ncalrpc\n"
625 "log file=%s/log.smbd\n"
626 "smb passwd file=%s/smbpasswd\n"
627 "security = user\n"
628 "map to guest = Bad User\n"
629 "load printers = no\n"
630 "printing = bsd\n"
631 "disable spoolss = yes\n"
632 "usershare max shares = 0\n"
633 "[qemu]\n"
634 "path=%s\n"
635 "read only=no\n"
636 "guest ok=yes\n"
637 "force user=%s\n",
638 s->smb_dir,
639 s->smb_dir,
640 s->smb_dir,
641 s->smb_dir,
642 s->smb_dir,
643 s->smb_dir,
644 s->smb_dir,
645 s->smb_dir,
646 exported_dir,
647 passwd->pw_name
649 fclose(f);
651 snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -l %s -s %s",
652 CONFIG_SMBD_COMMAND, s->smb_dir, smb_conf);
654 if (slirp_add_exec(s->slirp, 0, smb_cmdline, &vserver_addr, 139) < 0 ||
655 slirp_add_exec(s->slirp, 0, smb_cmdline, &vserver_addr, 445) < 0) {
656 slirp_smb_cleanup(s);
657 error_report("conflicting/invalid smbserver address");
658 return -1;
660 return 0;
663 /* automatic user mode samba server configuration (legacy interface) */
664 int net_slirp_smb(const char *exported_dir)
666 struct in_addr vserver_addr = { .s_addr = 0 };
668 if (legacy_smb_export) {
669 fprintf(stderr, "-smb given twice\n");
670 return -1;
672 legacy_smb_export = exported_dir;
673 if (!QTAILQ_EMPTY(&slirp_stacks)) {
674 return slirp_smb(QTAILQ_FIRST(&slirp_stacks), exported_dir,
675 vserver_addr);
677 return 0;
680 #endif /* !defined(_WIN32) */
682 struct GuestFwd {
683 CharDriverState *hd;
684 struct in_addr server;
685 int port;
686 Slirp *slirp;
689 static int guestfwd_can_read(void *opaque)
691 struct GuestFwd *fwd = opaque;
692 return slirp_socket_can_recv(fwd->slirp, fwd->server, fwd->port);
695 static void guestfwd_read(void *opaque, const uint8_t *buf, int size)
697 struct GuestFwd *fwd = opaque;
698 slirp_socket_recv(fwd->slirp, fwd->server, fwd->port, buf, size);
701 static int slirp_guestfwd(SlirpState *s, const char *config_str,
702 int legacy_format)
704 struct in_addr server = { .s_addr = 0 };
705 struct GuestFwd *fwd;
706 const char *p;
707 char buf[128];
708 char *end;
709 int port;
711 p = config_str;
712 if (legacy_format) {
713 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
714 goto fail_syntax;
716 } else {
717 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
718 goto fail_syntax;
720 if (strcmp(buf, "tcp") && buf[0] != '\0') {
721 goto fail_syntax;
723 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
724 goto fail_syntax;
726 if (buf[0] != '\0' && !inet_aton(buf, &server)) {
727 goto fail_syntax;
729 if (get_str_sep(buf, sizeof(buf), &p, '-') < 0) {
730 goto fail_syntax;
733 port = strtol(buf, &end, 10);
734 if (*end != '\0' || port < 1 || port > 65535) {
735 goto fail_syntax;
738 snprintf(buf, sizeof(buf), "guestfwd.tcp.%d", port);
740 if ((strlen(p) > 4) && !strncmp(p, "cmd:", 4)) {
741 if (slirp_add_exec(s->slirp, 0, &p[4], &server, port) < 0) {
742 error_report("conflicting/invalid host:port in guest forwarding "
743 "rule '%s'", config_str);
744 return -1;
746 } else {
747 fwd = g_new(struct GuestFwd, 1);
748 fwd->hd = qemu_chr_new(buf, p, NULL);
749 if (!fwd->hd) {
750 error_report("could not open guest forwarding device '%s'", buf);
751 g_free(fwd);
752 return -1;
755 if (slirp_add_exec(s->slirp, 3, fwd->hd, &server, port) < 0) {
756 error_report("conflicting/invalid host:port in guest forwarding "
757 "rule '%s'", config_str);
758 g_free(fwd);
759 return -1;
761 fwd->server = server;
762 fwd->port = port;
763 fwd->slirp = s->slirp;
765 qemu_chr_fe_claim_no_fail(fwd->hd);
766 qemu_chr_add_handlers(fwd->hd, guestfwd_can_read, guestfwd_read,
767 NULL, fwd);
769 return 0;
771 fail_syntax:
772 error_report("invalid guest forwarding rule '%s'", config_str);
773 return -1;
776 void hmp_info_usernet(Monitor *mon, const QDict *qdict)
778 SlirpState *s;
780 QTAILQ_FOREACH(s, &slirp_stacks, entry) {
781 int id;
782 bool got_vlan_id = net_hub_id_for_client(&s->nc, &id) == 0;
783 monitor_printf(mon, "VLAN %d (%s):\n",
784 got_vlan_id ? id : -1,
785 s->nc.name);
786 slirp_connection_info(s->slirp, mon);
790 static void
791 net_init_slirp_configs(const StringList *fwd, int flags)
793 while (fwd) {
794 struct slirp_config_str *config;
796 config = g_malloc0(sizeof(*config));
797 pstrcpy(config->str, sizeof(config->str), fwd->value->str);
798 config->flags = flags;
799 config->next = slirp_configs;
800 slirp_configs = config;
802 fwd = fwd->next;
806 static const char **slirp_dnssearch(const StringList *dnsname)
808 const StringList *c = dnsname;
809 size_t i = 0, num_opts = 0;
810 const char **ret;
812 while (c) {
813 num_opts++;
814 c = c->next;
817 if (num_opts == 0) {
818 return NULL;
821 ret = g_malloc((num_opts + 1) * sizeof(*ret));
822 c = dnsname;
823 while (c) {
824 ret[i++] = c->value->str;
825 c = c->next;
827 ret[i] = NULL;
828 return ret;
831 int net_init_slirp(const NetClientOptions *opts, const char *name,
832 NetClientState *peer, Error **errp)
834 /* FIXME error_setg(errp, ...) on failure */
835 struct slirp_config_str *config;
836 char *vnet;
837 int ret;
838 const NetdevUserOptions *user;
839 const char **dnssearch;
840 bool ipv4 = true, ipv6 = true;
842 assert(opts->type == NET_CLIENT_OPTIONS_KIND_USER);
843 user = opts->u.user.data;
845 if ((user->has_ipv6 && user->ipv6 && !user->has_ipv4) ||
846 (user->has_ipv4 && !user->ipv4)) {
847 ipv4 = 0;
849 if ((user->has_ipv4 && user->ipv4 && !user->has_ipv6) ||
850 (user->has_ipv6 && !user->ipv6)) {
851 ipv6 = 0;
854 vnet = user->has_net ? g_strdup(user->net) :
855 user->has_ip ? g_strdup_printf("%s/24", user->ip) :
856 NULL;
858 dnssearch = slirp_dnssearch(user->dnssearch);
860 /* all optional fields are initialized to "all bits zero" */
862 net_init_slirp_configs(user->hostfwd, SLIRP_CFG_HOSTFWD);
863 net_init_slirp_configs(user->guestfwd, 0);
865 ret = net_slirp_init(peer, "user", name, user->q_restrict,
866 ipv4, vnet, user->host,
867 ipv6, user->ipv6_prefix, user->ipv6_prefixlen,
868 user->ipv6_host, user->hostname, user->tftp,
869 user->bootfile, user->dhcpstart,
870 user->dns, user->ipv6_dns, user->smb,
871 user->smbserver, dnssearch);
873 while (slirp_configs) {
874 config = slirp_configs;
875 slirp_configs = config->next;
876 g_free(config);
879 g_free(vnet);
880 g_free(dnssearch);
882 return ret;
885 int net_slirp_parse_legacy(QemuOptsList *opts_list, const char *optarg, int *ret)
887 if (strcmp(opts_list->name, "net") != 0 ||
888 strncmp(optarg, "channel,", strlen("channel,")) != 0) {
889 return 0;
892 error_report("The '-net channel' option is deprecated. "
893 "Please use '-netdev user,guestfwd=...' instead.");
895 /* handle legacy -net channel,port:chr */
896 optarg += strlen("channel,");
898 if (QTAILQ_EMPTY(&slirp_stacks)) {
899 struct slirp_config_str *config;
901 config = g_malloc(sizeof(*config));
902 pstrcpy(config->str, sizeof(config->str), optarg);
903 config->flags = SLIRP_CFG_LEGACY;
904 config->next = slirp_configs;
905 slirp_configs = config;
906 *ret = 0;
907 } else {
908 *ret = slirp_guestfwd(QTAILQ_FIRST(&slirp_stacks), optarg, 1);
911 return 1;