hw/display/xlnx_dp: Free FIFOs adding xlnx_dp_finalize()
[qemu/ar7.git] / net / slirp.c
bloba9fdc7a08f24b9923386c7f0344a0dcec81c01c1
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.
25 #include "qemu/osdep.h"
26 #include "qemu/log.h"
27 #include "net/slirp.h"
30 #ifndef _WIN32
31 #include <pwd.h>
32 #include <sys/wait.h>
33 #endif
34 #include "net/eth.h"
35 #include "net/net.h"
36 #include "clients.h"
37 #include "hub.h"
38 #include "monitor/monitor.h"
39 #include "qemu/error-report.h"
40 #include "qemu/sockets.h"
41 #include <libslirp.h>
42 #include "chardev/char-fe.h"
43 #include "sysemu/sysemu.h"
44 #include "qemu/cutils.h"
45 #include "qapi/error.h"
46 #include "qapi/qmp/qdict.h"
47 #include "util.h"
48 #include "migration/register.h"
49 #include "migration/qemu-file-types.h"
51 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
53 const char *p, *p1;
54 int len;
55 p = *pp;
56 p1 = strchr(p, sep);
57 if (!p1)
58 return -1;
59 len = p1 - p;
60 p1++;
61 if (buf_size > 0) {
62 if (len > buf_size - 1)
63 len = buf_size - 1;
64 memcpy(buf, p, len);
65 buf[len] = '\0';
67 *pp = p1;
68 return 0;
71 /* slirp network adapter */
73 #define SLIRP_CFG_HOSTFWD 1
75 struct slirp_config_str {
76 struct slirp_config_str *next;
77 int flags;
78 char str[1024];
81 struct GuestFwd {
82 CharBackend hd;
83 struct in_addr server;
84 int port;
85 Slirp *slirp;
88 typedef struct SlirpState {
89 NetClientState nc;
90 QTAILQ_ENTRY(SlirpState) entry;
91 Slirp *slirp;
92 Notifier poll_notifier;
93 Notifier exit_notifier;
94 #ifndef _WIN32
95 gchar *smb_dir;
96 #endif
97 GSList *fwd;
98 } SlirpState;
100 static struct slirp_config_str *slirp_configs;
101 static QTAILQ_HEAD(, SlirpState) slirp_stacks =
102 QTAILQ_HEAD_INITIALIZER(slirp_stacks);
104 static int slirp_hostfwd(SlirpState *s, const char *redir_str, Error **errp);
105 static int slirp_guestfwd(SlirpState *s, const char *config_str, Error **errp);
107 #ifndef _WIN32
108 static int slirp_smb(SlirpState *s, const char *exported_dir,
109 struct in_addr vserver_addr, Error **errp);
110 static void slirp_smb_cleanup(SlirpState *s);
111 #else
112 static inline void slirp_smb_cleanup(SlirpState *s) { }
113 #endif
115 static ssize_t net_slirp_send_packet(const void *pkt, size_t pkt_len,
116 void *opaque)
118 SlirpState *s = opaque;
119 uint8_t min_pkt[ETH_ZLEN];
120 size_t min_pktsz = sizeof(min_pkt);
122 if (!s->nc.peer->do_not_pad) {
123 if (eth_pad_short_frame(min_pkt, &min_pktsz, pkt, pkt_len)) {
124 pkt = min_pkt;
125 pkt_len = min_pktsz;
129 return qemu_send_packet(&s->nc, pkt, pkt_len);
132 static ssize_t net_slirp_receive(NetClientState *nc, const uint8_t *buf, size_t size)
134 SlirpState *s = DO_UPCAST(SlirpState, nc, nc);
136 slirp_input(s->slirp, buf, size);
138 return size;
141 static void slirp_smb_exit(Notifier *n, void *data)
143 SlirpState *s = container_of(n, SlirpState, exit_notifier);
144 slirp_smb_cleanup(s);
147 static void slirp_free_fwd(gpointer data)
149 struct GuestFwd *fwd = data;
151 qemu_chr_fe_deinit(&fwd->hd, true);
152 g_free(data);
155 static void net_slirp_cleanup(NetClientState *nc)
157 SlirpState *s = DO_UPCAST(SlirpState, nc, nc);
159 g_slist_free_full(s->fwd, slirp_free_fwd);
160 main_loop_poll_remove_notifier(&s->poll_notifier);
161 unregister_savevm(NULL, "slirp", s->slirp);
162 slirp_cleanup(s->slirp);
163 if (s->exit_notifier.notify) {
164 qemu_remove_exit_notifier(&s->exit_notifier);
166 slirp_smb_cleanup(s);
167 QTAILQ_REMOVE(&slirp_stacks, s, entry);
170 static NetClientInfo net_slirp_info = {
171 .type = NET_CLIENT_DRIVER_USER,
172 .size = sizeof(SlirpState),
173 .receive = net_slirp_receive,
174 .cleanup = net_slirp_cleanup,
177 static void net_slirp_guest_error(const char *msg, void *opaque)
179 qemu_log_mask(LOG_GUEST_ERROR, "%s", msg);
182 static int64_t net_slirp_clock_get_ns(void *opaque)
184 return qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
187 static void *net_slirp_timer_new(SlirpTimerCb cb,
188 void *cb_opaque, void *opaque)
190 return timer_new_full(NULL, QEMU_CLOCK_VIRTUAL,
191 SCALE_MS, QEMU_TIMER_ATTR_EXTERNAL,
192 cb, cb_opaque);
195 static void net_slirp_timer_free(void *timer, void *opaque)
197 timer_free(timer);
200 static void net_slirp_timer_mod(void *timer, int64_t expire_timer,
201 void *opaque)
203 timer_mod(timer, expire_timer);
206 static void net_slirp_register_poll_fd(int fd, void *opaque)
208 qemu_fd_register(fd);
211 static void net_slirp_unregister_poll_fd(int fd, void *opaque)
213 /* no qemu_fd_unregister */
216 static void net_slirp_notify(void *opaque)
218 qemu_notify_event();
221 static const SlirpCb slirp_cb = {
222 .send_packet = net_slirp_send_packet,
223 .guest_error = net_slirp_guest_error,
224 .clock_get_ns = net_slirp_clock_get_ns,
225 .timer_new = net_slirp_timer_new,
226 .timer_free = net_slirp_timer_free,
227 .timer_mod = net_slirp_timer_mod,
228 .register_poll_fd = net_slirp_register_poll_fd,
229 .unregister_poll_fd = net_slirp_unregister_poll_fd,
230 .notify = net_slirp_notify,
233 static int slirp_poll_to_gio(int events)
235 int ret = 0;
237 if (events & SLIRP_POLL_IN) {
238 ret |= G_IO_IN;
240 if (events & SLIRP_POLL_OUT) {
241 ret |= G_IO_OUT;
243 if (events & SLIRP_POLL_PRI) {
244 ret |= G_IO_PRI;
246 if (events & SLIRP_POLL_ERR) {
247 ret |= G_IO_ERR;
249 if (events & SLIRP_POLL_HUP) {
250 ret |= G_IO_HUP;
253 return ret;
256 static int net_slirp_add_poll(int fd, int events, void *opaque)
258 GArray *pollfds = opaque;
259 GPollFD pfd = {
260 .fd = fd,
261 .events = slirp_poll_to_gio(events),
263 int idx = pollfds->len;
264 g_array_append_val(pollfds, pfd);
265 return idx;
268 static int slirp_gio_to_poll(int events)
270 int ret = 0;
272 if (events & G_IO_IN) {
273 ret |= SLIRP_POLL_IN;
275 if (events & G_IO_OUT) {
276 ret |= SLIRP_POLL_OUT;
278 if (events & G_IO_PRI) {
279 ret |= SLIRP_POLL_PRI;
281 if (events & G_IO_ERR) {
282 ret |= SLIRP_POLL_ERR;
284 if (events & G_IO_HUP) {
285 ret |= SLIRP_POLL_HUP;
288 return ret;
291 static int net_slirp_get_revents(int idx, void *opaque)
293 GArray *pollfds = opaque;
295 return slirp_gio_to_poll(g_array_index(pollfds, GPollFD, idx).revents);
298 static void net_slirp_poll_notify(Notifier *notifier, void *data)
300 MainLoopPoll *poll = data;
301 SlirpState *s = container_of(notifier, SlirpState, poll_notifier);
303 switch (poll->state) {
304 case MAIN_LOOP_POLL_FILL:
305 slirp_pollfds_fill(s->slirp, &poll->timeout,
306 net_slirp_add_poll, poll->pollfds);
307 break;
308 case MAIN_LOOP_POLL_OK:
309 case MAIN_LOOP_POLL_ERR:
310 slirp_pollfds_poll(s->slirp, poll->state == MAIN_LOOP_POLL_ERR,
311 net_slirp_get_revents, poll->pollfds);
312 break;
313 default:
314 g_assert_not_reached();
318 static ssize_t
319 net_slirp_stream_read(void *buf, size_t size, void *opaque)
321 QEMUFile *f = opaque;
323 return qemu_get_buffer(f, buf, size);
326 static ssize_t
327 net_slirp_stream_write(const void *buf, size_t size, void *opaque)
329 QEMUFile *f = opaque;
331 qemu_put_buffer(f, buf, size);
332 if (qemu_file_get_error(f)) {
333 return -1;
336 return size;
339 static int net_slirp_state_load(QEMUFile *f, void *opaque, int version_id)
341 Slirp *slirp = opaque;
343 return slirp_state_load(slirp, version_id, net_slirp_stream_read, f);
346 static void net_slirp_state_save(QEMUFile *f, void *opaque)
348 Slirp *slirp = opaque;
350 slirp_state_save(slirp, net_slirp_stream_write, f);
353 static SaveVMHandlers savevm_slirp_state = {
354 .save_state = net_slirp_state_save,
355 .load_state = net_slirp_state_load,
358 static int net_slirp_init(NetClientState *peer, const char *model,
359 const char *name, int restricted,
360 bool ipv4, const char *vnetwork, const char *vhost,
361 bool ipv6, const char *vprefix6, int vprefix6_len,
362 const char *vhost6,
363 const char *vhostname, const char *tftp_export,
364 const char *bootfile, const char *vdhcp_start,
365 const char *vnameserver, const char *vnameserver6,
366 const char *smb_export, const char *vsmbserver,
367 const char **dnssearch, const char *vdomainname,
368 const char *tftp_server_name,
369 Error **errp)
371 /* default settings according to historic slirp */
372 struct in_addr net = { .s_addr = htonl(0x0a000200) }; /* 10.0.2.0 */
373 struct in_addr mask = { .s_addr = htonl(0xffffff00) }; /* 255.255.255.0 */
374 struct in_addr host = { .s_addr = htonl(0x0a000202) }; /* 10.0.2.2 */
375 struct in_addr dhcp = { .s_addr = htonl(0x0a00020f) }; /* 10.0.2.15 */
376 struct in_addr dns = { .s_addr = htonl(0x0a000203) }; /* 10.0.2.3 */
377 struct in6_addr ip6_prefix;
378 struct in6_addr ip6_host;
379 struct in6_addr ip6_dns;
380 #ifndef _WIN32
381 struct in_addr smbsrv = { .s_addr = 0 };
382 #endif
383 NetClientState *nc;
384 SlirpState *s;
385 char buf[20];
386 uint32_t addr;
387 int shift;
388 char *end;
389 struct slirp_config_str *config;
390 NetdevUserOptions *stored;
391 StringList **stored_hostfwd;
392 StringList **stored_guestfwd;
394 if (!ipv4 && (vnetwork || vhost || vnameserver)) {
395 error_setg(errp, "IPv4 disabled but netmask/host/dns provided");
396 return -1;
399 if (!ipv6 && (vprefix6 || vhost6 || vnameserver6)) {
400 error_setg(errp, "IPv6 disabled but prefix/host6/dns6 provided");
401 return -1;
404 if (!ipv4 && !ipv6) {
405 /* It doesn't make sense to disable both */
406 error_setg(errp, "IPv4 and IPv6 disabled");
407 return -1;
410 if (vnetwork) {
411 if (get_str_sep(buf, sizeof(buf), &vnetwork, '/') < 0) {
412 if (!inet_aton(vnetwork, &net)) {
413 error_setg(errp, "Failed to parse netmask");
414 return -1;
416 addr = ntohl(net.s_addr);
417 if (!(addr & 0x80000000)) {
418 mask.s_addr = htonl(0xff000000); /* class A */
419 } else if ((addr & 0xfff00000) == 0xac100000) {
420 mask.s_addr = htonl(0xfff00000); /* priv. 172.16.0.0/12 */
421 } else if ((addr & 0xc0000000) == 0x80000000) {
422 mask.s_addr = htonl(0xffff0000); /* class B */
423 } else if ((addr & 0xffff0000) == 0xc0a80000) {
424 mask.s_addr = htonl(0xffff0000); /* priv. 192.168.0.0/16 */
425 } else if ((addr & 0xffff0000) == 0xc6120000) {
426 mask.s_addr = htonl(0xfffe0000); /* tests 198.18.0.0/15 */
427 } else if ((addr & 0xe0000000) == 0xe0000000) {
428 mask.s_addr = htonl(0xffffff00); /* class C */
429 } else {
430 mask.s_addr = htonl(0xfffffff0); /* multicast/reserved */
432 } else {
433 if (!inet_aton(buf, &net)) {
434 error_setg(errp, "Failed to parse netmask");
435 return -1;
437 shift = strtol(vnetwork, &end, 10);
438 if (*end != '\0') {
439 if (!inet_aton(vnetwork, &mask)) {
440 error_setg(errp,
441 "Failed to parse netmask (trailing chars)");
442 return -1;
444 } else if (shift < 4 || shift > 32) {
445 error_setg(errp,
446 "Invalid netmask provided (must be in range 4-32)");
447 return -1;
448 } else {
449 mask.s_addr = htonl(0xffffffff << (32 - shift));
452 net.s_addr &= mask.s_addr;
453 host.s_addr = net.s_addr | (htonl(0x0202) & ~mask.s_addr);
454 dhcp.s_addr = net.s_addr | (htonl(0x020f) & ~mask.s_addr);
455 dns.s_addr = net.s_addr | (htonl(0x0203) & ~mask.s_addr);
458 if (vhost && !inet_aton(vhost, &host)) {
459 error_setg(errp, "Failed to parse host");
460 return -1;
462 if ((host.s_addr & mask.s_addr) != net.s_addr) {
463 error_setg(errp, "Host doesn't belong to network");
464 return -1;
467 if (vnameserver && !inet_aton(vnameserver, &dns)) {
468 error_setg(errp, "Failed to parse DNS");
469 return -1;
471 if (restricted && (dns.s_addr & mask.s_addr) != net.s_addr) {
472 error_setg(errp, "DNS doesn't belong to network");
473 return -1;
475 if (dns.s_addr == host.s_addr) {
476 error_setg(errp, "DNS must be different from host");
477 return -1;
480 if (vdhcp_start && !inet_aton(vdhcp_start, &dhcp)) {
481 error_setg(errp, "Failed to parse DHCP start address");
482 return -1;
484 if ((dhcp.s_addr & mask.s_addr) != net.s_addr) {
485 error_setg(errp, "DHCP doesn't belong to network");
486 return -1;
488 if (dhcp.s_addr == host.s_addr || dhcp.s_addr == dns.s_addr) {
489 error_setg(errp, "DHCP must be different from host and DNS");
490 return -1;
493 #ifndef _WIN32
494 if (vsmbserver && !inet_aton(vsmbserver, &smbsrv)) {
495 error_setg(errp, "Failed to parse SMB address");
496 return -1;
498 #endif
500 if (!vprefix6) {
501 vprefix6 = "fec0::";
503 if (!inet_pton(AF_INET6, vprefix6, &ip6_prefix)) {
504 error_setg(errp, "Failed to parse IPv6 prefix");
505 return -1;
508 if (!vprefix6_len) {
509 vprefix6_len = 64;
511 if (vprefix6_len < 0 || vprefix6_len > 126) {
512 error_setg(errp,
513 "Invalid IPv6 prefix provided "
514 "(IPv6 prefix length must be between 0 and 126)");
515 return -1;
518 if (vhost6) {
519 if (!inet_pton(AF_INET6, vhost6, &ip6_host)) {
520 error_setg(errp, "Failed to parse IPv6 host");
521 return -1;
523 if (!in6_equal_net(&ip6_prefix, &ip6_host, vprefix6_len)) {
524 error_setg(errp, "IPv6 Host doesn't belong to network");
525 return -1;
527 } else {
528 ip6_host = ip6_prefix;
529 ip6_host.s6_addr[15] |= 2;
532 if (vnameserver6) {
533 if (!inet_pton(AF_INET6, vnameserver6, &ip6_dns)) {
534 error_setg(errp, "Failed to parse IPv6 DNS");
535 return -1;
537 if (restricted && !in6_equal_net(&ip6_prefix, &ip6_dns, vprefix6_len)) {
538 error_setg(errp, "IPv6 DNS doesn't belong to network");
539 return -1;
541 } else {
542 ip6_dns = ip6_prefix;
543 ip6_dns.s6_addr[15] |= 3;
546 if (vdomainname && !*vdomainname) {
547 error_setg(errp, "'domainname' parameter cannot be empty");
548 return -1;
551 if (vdomainname && strlen(vdomainname) > 255) {
552 error_setg(errp, "'domainname' parameter cannot exceed 255 bytes");
553 return -1;
556 if (vhostname && strlen(vhostname) > 255) {
557 error_setg(errp, "'vhostname' parameter cannot exceed 255 bytes");
558 return -1;
561 if (tftp_server_name && strlen(tftp_server_name) > 255) {
562 error_setg(errp, "'tftp-server-name' parameter cannot exceed 255 bytes");
563 return -1;
566 nc = qemu_new_net_client(&net_slirp_info, peer, model, name);
568 /* Store startup parameters */
569 nc->stored_config = g_new0(NetdevInfo, 1);
570 nc->stored_config->type = NET_BACKEND_USER;
571 stored = &nc->stored_config->u.user;
573 if (vhostname) {
574 stored->has_hostname = true;
575 stored->hostname = g_strdup(vhostname);
578 stored->has_q_restrict = true;
579 stored->q_restrict = restricted;
581 stored->has_ipv4 = true;
582 stored->ipv4 = ipv4;
584 stored->has_ipv6 = true;
585 stored->ipv6 = ipv6;
587 if (ipv4) {
588 uint8_t *net_bytes = (uint8_t *)&net;
589 uint8_t *mask_bytes = (uint8_t *)&mask;
591 stored->has_net = true;
592 stored->net = g_strdup_printf("%d.%d.%d.%d/%d.%d.%d.%d",
593 net_bytes[0], net_bytes[1],
594 net_bytes[2], net_bytes[3],
595 mask_bytes[0], mask_bytes[1],
596 mask_bytes[2], mask_bytes[3]);
598 stored->has_host = true;
599 stored->host = g_strdup(inet_ntoa(host));
602 if (tftp_export) {
603 stored->has_tftp = true;
604 stored->tftp = g_strdup(tftp_export);
607 if (bootfile) {
608 stored->has_bootfile = true;
609 stored->bootfile = g_strdup(bootfile);
612 if (vdhcp_start) {
613 stored->has_dhcpstart = true;
614 stored->dhcpstart = g_strdup(vdhcp_start);
617 if (ipv4) {
618 stored->has_dns = true;
619 stored->dns = g_strdup(inet_ntoa(dns));
622 if (dnssearch) {
623 stored->has_dnssearch = true;
624 StringList **stored_list = &stored->dnssearch;
626 for (int i = 0; dnssearch[i]; i++) {
627 String *element = g_new0(String, 1);
629 element->str = g_strdup(dnssearch[i]);
630 QAPI_LIST_APPEND(stored_list, element);
634 if (vdomainname) {
635 stored->has_domainname = true;
636 stored->domainname = g_strdup(vdomainname);
639 if (ipv6) {
640 char addrstr[INET6_ADDRSTRLEN];
641 const char *res;
643 stored->has_ipv6_prefix = true;
644 stored->ipv6_prefix = g_strdup(vprefix6);
646 stored->has_ipv6_prefixlen = true;
647 stored->ipv6_prefixlen = vprefix6_len;
649 res = inet_ntop(AF_INET6, &ip6_host,
650 addrstr, sizeof(addrstr));
652 stored->has_ipv6_host = true;
653 stored->ipv6_host = g_strdup(res);
655 res = inet_ntop(AF_INET6, &ip6_dns,
656 addrstr, sizeof(addrstr));
658 stored->has_ipv6_dns = true;
659 stored->ipv6_dns = g_strdup(res);
662 if (smb_export) {
663 stored->has_smb = true;
664 stored->smb = g_strdup(smb_export);
667 if (vsmbserver) {
668 stored->has_smbserver = true;
669 stored->smbserver = g_strdup(vsmbserver);
672 if (tftp_server_name) {
673 stored->has_tftp_server_name = true;
674 stored->tftp_server_name = g_strdup(tftp_server_name);
677 s = DO_UPCAST(SlirpState, nc, nc);
679 s->slirp = slirp_init(restricted, ipv4, net, mask, host,
680 ipv6, ip6_prefix, vprefix6_len, ip6_host,
681 vhostname, tftp_server_name,
682 tftp_export, bootfile, dhcp,
683 dns, ip6_dns, dnssearch, vdomainname,
684 &slirp_cb, s);
685 QTAILQ_INSERT_TAIL(&slirp_stacks, s, entry);
688 * Make sure the current bitstream version of slirp is 4, to avoid
689 * QEMU migration incompatibilities, if upstream slirp bumped the
690 * version.
692 * FIXME: use bitfields of features? teach libslirp to save with
693 * specific version?
695 g_assert(slirp_state_version() == 4);
696 register_savevm_live("slirp", 0, slirp_state_version(),
697 &savevm_slirp_state, s->slirp);
699 s->poll_notifier.notify = net_slirp_poll_notify;
700 main_loop_poll_add_notifier(&s->poll_notifier);
702 stored_hostfwd = &stored->hostfwd;
703 stored_guestfwd = &stored->guestfwd;
705 for (config = slirp_configs; config; config = config->next) {
706 String *element = g_new0(String, 1);
708 element->str = g_strdup(config->str);
709 if (config->flags & SLIRP_CFG_HOSTFWD) {
710 if (slirp_hostfwd(s, config->str, errp) < 0) {
711 goto error;
713 stored->has_hostfwd = true;
714 QAPI_LIST_APPEND(stored_hostfwd, element);
715 } else {
716 if (slirp_guestfwd(s, config->str, errp) < 0) {
717 goto error;
719 stored->has_guestfwd = true;
720 QAPI_LIST_APPEND(stored_guestfwd, element);
723 #ifndef _WIN32
724 if (smb_export) {
725 if (slirp_smb(s, smb_export, smbsrv, errp) < 0) {
726 goto error;
729 #endif
731 s->exit_notifier.notify = slirp_smb_exit;
732 qemu_add_exit_notifier(&s->exit_notifier);
733 return 0;
735 error:
736 qemu_del_net_client(nc);
737 return -1;
740 static SlirpState *slirp_lookup(Monitor *mon, const char *id)
742 if (id) {
743 NetClientState *nc = qemu_find_netdev(id);
744 if (!nc) {
745 monitor_printf(mon, "unrecognized netdev id '%s'\n", id);
746 return NULL;
748 if (strcmp(nc->model, "user")) {
749 monitor_printf(mon, "invalid device specified\n");
750 return NULL;
752 return DO_UPCAST(SlirpState, nc, nc);
753 } else {
754 if (QTAILQ_EMPTY(&slirp_stacks)) {
755 monitor_printf(mon, "user mode network stack not in use\n");
756 return NULL;
758 return QTAILQ_FIRST(&slirp_stacks);
762 void hmp_hostfwd_remove(Monitor *mon, const QDict *qdict)
764 struct in_addr host_addr = { .s_addr = INADDR_ANY };
765 int host_port;
766 char buf[256];
767 const char *src_str, *p;
768 SlirpState *s;
769 int is_udp = 0;
770 int err;
771 const char *arg1 = qdict_get_str(qdict, "arg1");
772 const char *arg2 = qdict_get_try_str(qdict, "arg2");
774 if (arg2) {
775 s = slirp_lookup(mon, arg1);
776 src_str = arg2;
777 } else {
778 s = slirp_lookup(mon, NULL);
779 src_str = arg1;
781 if (!s) {
782 return;
785 p = src_str;
786 if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
787 goto fail_syntax;
790 if (!strcmp(buf, "tcp") || buf[0] == '\0') {
791 is_udp = 0;
792 } else if (!strcmp(buf, "udp")) {
793 is_udp = 1;
794 } else {
795 goto fail_syntax;
798 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
799 goto fail_syntax;
801 if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
802 goto fail_syntax;
805 if (qemu_strtoi(p, NULL, 10, &host_port)) {
806 goto fail_syntax;
809 err = slirp_remove_hostfwd(s->slirp, is_udp, host_addr, host_port);
811 monitor_printf(mon, "host forwarding rule for %s %s\n", src_str,
812 err ? "not found" : "removed");
813 return;
815 fail_syntax:
816 monitor_printf(mon, "invalid format\n");
819 static int slirp_hostfwd(SlirpState *s, const char *redir_str, Error **errp)
821 struct in_addr host_addr = { .s_addr = INADDR_ANY };
822 struct in_addr guest_addr = { .s_addr = 0 };
823 int host_port, guest_port;
824 const char *p;
825 char buf[256];
826 int is_udp;
827 char *end;
828 const char *fail_reason = "Unknown reason";
830 p = redir_str;
831 if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
832 fail_reason = "No : separators";
833 goto fail_syntax;
835 if (!strcmp(buf, "tcp") || buf[0] == '\0') {
836 is_udp = 0;
837 } else if (!strcmp(buf, "udp")) {
838 is_udp = 1;
839 } else {
840 fail_reason = "Bad protocol name";
841 goto fail_syntax;
844 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
845 fail_reason = "Missing : separator";
846 goto fail_syntax;
848 if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
849 fail_reason = "Bad host address";
850 goto fail_syntax;
853 if (get_str_sep(buf, sizeof(buf), &p, '-') < 0) {
854 fail_reason = "Bad host port separator";
855 goto fail_syntax;
857 host_port = strtol(buf, &end, 0);
858 if (*end != '\0' || host_port < 0 || host_port > 65535) {
859 fail_reason = "Bad host port";
860 goto fail_syntax;
863 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
864 fail_reason = "Missing guest address";
865 goto fail_syntax;
867 if (buf[0] != '\0' && !inet_aton(buf, &guest_addr)) {
868 fail_reason = "Bad guest address";
869 goto fail_syntax;
872 guest_port = strtol(p, &end, 0);
873 if (*end != '\0' || guest_port < 1 || guest_port > 65535) {
874 fail_reason = "Bad guest port";
875 goto fail_syntax;
878 if (slirp_add_hostfwd(s->slirp, is_udp, host_addr, host_port, guest_addr,
879 guest_port) < 0) {
880 error_setg(errp, "Could not set up host forwarding rule '%s'",
881 redir_str);
882 return -1;
884 return 0;
886 fail_syntax:
887 error_setg(errp, "Invalid host forwarding rule '%s' (%s)", redir_str,
888 fail_reason);
889 return -1;
892 void hmp_hostfwd_add(Monitor *mon, const QDict *qdict)
894 const char *redir_str;
895 SlirpState *s;
896 const char *arg1 = qdict_get_str(qdict, "arg1");
897 const char *arg2 = qdict_get_try_str(qdict, "arg2");
899 if (arg2) {
900 s = slirp_lookup(mon, arg1);
901 redir_str = arg2;
902 } else {
903 s = slirp_lookup(mon, NULL);
904 redir_str = arg1;
906 if (s) {
907 Error *err = NULL;
908 if (slirp_hostfwd(s, redir_str, &err) < 0) {
909 error_report_err(err);
915 #ifndef _WIN32
917 /* automatic user mode samba server configuration */
918 static void slirp_smb_cleanup(SlirpState *s)
920 int ret;
922 if (s->smb_dir) {
923 gchar *cmd = g_strdup_printf("rm -rf %s", s->smb_dir);
924 ret = system(cmd);
925 if (ret == -1 || !WIFEXITED(ret)) {
926 error_report("'%s' failed.", cmd);
927 } else if (WEXITSTATUS(ret)) {
928 error_report("'%s' failed. Error code: %d",
929 cmd, WEXITSTATUS(ret));
931 g_free(cmd);
932 g_free(s->smb_dir);
933 s->smb_dir = NULL;
937 static int slirp_smb(SlirpState* s, const char *exported_dir,
938 struct in_addr vserver_addr, Error **errp)
940 char *smb_conf;
941 char *smb_cmdline;
942 struct passwd *passwd;
943 FILE *f;
945 passwd = getpwuid(geteuid());
946 if (!passwd) {
947 error_setg(errp, "Failed to retrieve user name");
948 return -1;
951 if (access(CONFIG_SMBD_COMMAND, F_OK)) {
952 error_setg(errp, "Could not find '%s', please install it",
953 CONFIG_SMBD_COMMAND);
954 return -1;
957 if (access(exported_dir, R_OK | X_OK)) {
958 error_setg(errp, "Error accessing shared directory '%s': %s",
959 exported_dir, strerror(errno));
960 return -1;
963 s->smb_dir = g_dir_make_tmp("qemu-smb.XXXXXX", NULL);
964 if (!s->smb_dir) {
965 error_setg(errp, "Could not create samba server dir");
966 return -1;
968 smb_conf = g_strdup_printf("%s/%s", s->smb_dir, "smb.conf");
970 f = fopen(smb_conf, "w");
971 if (!f) {
972 slirp_smb_cleanup(s);
973 error_setg(errp,
974 "Could not create samba server configuration file '%s'",
975 smb_conf);
976 g_free(smb_conf);
977 return -1;
979 fprintf(f,
980 "[global]\n"
981 "private dir=%s\n"
982 "interfaces=127.0.0.1\n"
983 "bind interfaces only=yes\n"
984 "pid directory=%s\n"
985 "lock directory=%s\n"
986 "state directory=%s\n"
987 "cache directory=%s\n"
988 "ncalrpc dir=%s/ncalrpc\n"
989 "log file=%s/log.smbd\n"
990 "smb passwd file=%s/smbpasswd\n"
991 "security = user\n"
992 "map to guest = Bad User\n"
993 "load printers = no\n"
994 "printing = bsd\n"
995 "disable spoolss = yes\n"
996 "usershare max shares = 0\n"
997 "[qemu]\n"
998 "path=%s\n"
999 "read only=no\n"
1000 "guest ok=yes\n"
1001 "force user=%s\n",
1002 s->smb_dir,
1003 s->smb_dir,
1004 s->smb_dir,
1005 s->smb_dir,
1006 s->smb_dir,
1007 s->smb_dir,
1008 s->smb_dir,
1009 s->smb_dir,
1010 exported_dir,
1011 passwd->pw_name
1013 fclose(f);
1015 smb_cmdline = g_strdup_printf("%s -l %s -s %s",
1016 CONFIG_SMBD_COMMAND, s->smb_dir, smb_conf);
1017 g_free(smb_conf);
1019 if (slirp_add_exec(s->slirp, smb_cmdline, &vserver_addr, 139) < 0 ||
1020 slirp_add_exec(s->slirp, smb_cmdline, &vserver_addr, 445) < 0) {
1021 slirp_smb_cleanup(s);
1022 g_free(smb_cmdline);
1023 error_setg(errp, "Conflicting/invalid smbserver address");
1024 return -1;
1026 g_free(smb_cmdline);
1027 return 0;
1030 #endif /* !defined(_WIN32) */
1032 static int guestfwd_can_read(void *opaque)
1034 struct GuestFwd *fwd = opaque;
1035 return slirp_socket_can_recv(fwd->slirp, fwd->server, fwd->port);
1038 static void guestfwd_read(void *opaque, const uint8_t *buf, int size)
1040 struct GuestFwd *fwd = opaque;
1041 slirp_socket_recv(fwd->slirp, fwd->server, fwd->port, buf, size);
1044 static ssize_t guestfwd_write(const void *buf, size_t len, void *chr)
1046 return qemu_chr_fe_write_all(chr, buf, len);
1049 static int slirp_guestfwd(SlirpState *s, const char *config_str, Error **errp)
1051 /* TODO: IPv6 */
1052 struct in_addr server = { .s_addr = 0 };
1053 struct GuestFwd *fwd;
1054 const char *p;
1055 char buf[128];
1056 char *end;
1057 int port;
1059 p = config_str;
1060 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1061 goto fail_syntax;
1063 if (strcmp(buf, "tcp") && buf[0] != '\0') {
1064 goto fail_syntax;
1066 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1067 goto fail_syntax;
1069 if (buf[0] != '\0' && !inet_aton(buf, &server)) {
1070 goto fail_syntax;
1072 if (get_str_sep(buf, sizeof(buf), &p, '-') < 0) {
1073 goto fail_syntax;
1075 port = strtol(buf, &end, 10);
1076 if (*end != '\0' || port < 1 || port > 65535) {
1077 goto fail_syntax;
1080 snprintf(buf, sizeof(buf), "guestfwd.tcp.%d", port);
1082 if (g_str_has_prefix(p, "cmd:")) {
1083 if (slirp_add_exec(s->slirp, &p[4], &server, port) < 0) {
1084 error_setg(errp, "Conflicting/invalid host:port in guest "
1085 "forwarding rule '%s'", config_str);
1086 return -1;
1088 } else {
1089 Error *err = NULL;
1091 * FIXME: sure we want to support implicit
1092 * muxed monitors here?
1094 Chardev *chr = qemu_chr_new_mux_mon(buf, p, NULL);
1096 if (!chr) {
1097 error_setg(errp, "Could not open guest forwarding device '%s'",
1098 buf);
1099 return -1;
1102 fwd = g_new(struct GuestFwd, 1);
1103 qemu_chr_fe_init(&fwd->hd, chr, &err);
1104 if (err) {
1105 error_propagate(errp, err);
1106 object_unparent(OBJECT(chr));
1107 g_free(fwd);
1108 return -1;
1111 if (slirp_add_guestfwd(s->slirp, guestfwd_write, &fwd->hd,
1112 &server, port) < 0) {
1113 error_setg(errp, "Conflicting/invalid host:port in guest "
1114 "forwarding rule '%s'", config_str);
1115 qemu_chr_fe_deinit(&fwd->hd, true);
1116 g_free(fwd);
1117 return -1;
1119 fwd->server = server;
1120 fwd->port = port;
1121 fwd->slirp = s->slirp;
1123 qemu_chr_fe_set_handlers(&fwd->hd, guestfwd_can_read, guestfwd_read,
1124 NULL, NULL, fwd, NULL, true);
1125 s->fwd = g_slist_append(s->fwd, fwd);
1127 return 0;
1129 fail_syntax:
1130 error_setg(errp, "Invalid guest forwarding rule '%s'", config_str);
1131 return -1;
1134 void hmp_info_usernet(Monitor *mon, const QDict *qdict)
1136 SlirpState *s;
1138 QTAILQ_FOREACH(s, &slirp_stacks, entry) {
1139 int id;
1140 bool got_hub_id = net_hub_id_for_client(&s->nc, &id) == 0;
1141 char *info = slirp_connection_info(s->slirp);
1142 monitor_printf(mon, "Hub %d (%s):\n%s",
1143 got_hub_id ? id : -1,
1144 s->nc.name, info);
1145 g_free(info);
1149 static void
1150 net_init_slirp_configs(const StringList *fwd, int flags)
1152 while (fwd) {
1153 struct slirp_config_str *config;
1155 config = g_malloc0(sizeof(*config));
1156 pstrcpy(config->str, sizeof(config->str), fwd->value->str);
1157 config->flags = flags;
1158 config->next = slirp_configs;
1159 slirp_configs = config;
1161 fwd = fwd->next;
1165 static const char **slirp_dnssearch(const StringList *dnsname)
1167 const StringList *c = dnsname;
1168 size_t i = 0, num_opts = 0;
1169 const char **ret;
1171 while (c) {
1172 num_opts++;
1173 c = c->next;
1176 if (num_opts == 0) {
1177 return NULL;
1180 ret = g_malloc((num_opts + 1) * sizeof(*ret));
1181 c = dnsname;
1182 while (c) {
1183 ret[i++] = c->value->str;
1184 c = c->next;
1186 ret[i] = NULL;
1187 return ret;
1190 int net_init_slirp(const Netdev *netdev, const char *name,
1191 NetClientState *peer, Error **errp)
1193 struct slirp_config_str *config;
1194 char *vnet;
1195 int ret;
1196 const NetdevUserOptions *user;
1197 const char **dnssearch;
1198 bool ipv4 = true, ipv6 = true;
1200 assert(netdev->type == NET_CLIENT_DRIVER_USER);
1201 user = &netdev->u.user;
1203 if ((user->has_ipv6 && user->ipv6 && !user->has_ipv4) ||
1204 (user->has_ipv4 && !user->ipv4)) {
1205 ipv4 = 0;
1207 if ((user->has_ipv4 && user->ipv4 && !user->has_ipv6) ||
1208 (user->has_ipv6 && !user->ipv6)) {
1209 ipv6 = 0;
1212 vnet = user->has_net ? g_strdup(user->net) :
1213 user->has_ip ? g_strdup_printf("%s/24", user->ip) :
1214 NULL;
1216 dnssearch = slirp_dnssearch(user->dnssearch);
1218 /* all optional fields are initialized to "all bits zero" */
1220 net_init_slirp_configs(user->hostfwd, SLIRP_CFG_HOSTFWD);
1221 net_init_slirp_configs(user->guestfwd, 0);
1223 ret = net_slirp_init(peer, "user", name, user->q_restrict,
1224 ipv4, vnet, user->host,
1225 ipv6, user->ipv6_prefix, user->ipv6_prefixlen,
1226 user->ipv6_host, user->hostname, user->tftp,
1227 user->bootfile, user->dhcpstart,
1228 user->dns, user->ipv6_dns, user->smb,
1229 user->smbserver, dnssearch, user->domainname,
1230 user->tftp_server_name, errp);
1232 while (slirp_configs) {
1233 config = slirp_configs;
1234 slirp_configs = config->next;
1235 g_free(config);
1238 g_free(vnet);
1239 g_free(dnssearch);
1241 return ret;