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
24 #include "net/slirp.h"
26 #include "config-host.h"
34 #include "qemu_socket.h"
35 #include "slirp/libslirp.h"
37 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
48 if (len > buf_size - 1)
57 /* slirp network adapter */
59 #define SLIRP_CFG_HOSTFWD 1
60 #define SLIRP_CFG_LEGACY 2
62 struct slirp_config_str {
63 struct slirp_config_str *next;
69 typedef struct SlirpState {
71 QTAILQ_ENTRY(SlirpState) entry;
78 static struct slirp_config_str *slirp_configs;
79 const char *legacy_tftp_prefix;
80 const char *legacy_bootp_filename;
81 static QTAILQ_HEAD(slirp_stacks, SlirpState) slirp_stacks =
82 QTAILQ_HEAD_INITIALIZER(slirp_stacks);
84 static int slirp_hostfwd(SlirpState *s, const char *redir_str,
86 static int slirp_guestfwd(SlirpState *s, const char *config_str,
90 static const char *legacy_smb_export;
92 static int slirp_smb(SlirpState *s, const char *exported_dir,
93 struct in_addr vserver_addr);
94 static void slirp_smb_cleanup(SlirpState *s);
96 static inline void slirp_smb_cleanup(SlirpState *s) { }
99 int slirp_can_output(void *opaque)
101 SlirpState *s = opaque;
103 return qemu_can_send_packet(&s->nc);
106 void slirp_output(void *opaque, const uint8_t *pkt, int pkt_len)
108 SlirpState *s = opaque;
110 qemu_send_packet(&s->nc, pkt, pkt_len);
113 static ssize_t net_slirp_receive(VLANClientState *nc, const uint8_t *buf, size_t size)
115 SlirpState *s = DO_UPCAST(SlirpState, nc, nc);
117 slirp_input(s->slirp, buf, size);
122 static void net_slirp_cleanup(VLANClientState *nc)
124 SlirpState *s = DO_UPCAST(SlirpState, nc, nc);
126 slirp_cleanup(s->slirp);
127 slirp_smb_cleanup(s);
128 QTAILQ_REMOVE(&slirp_stacks, s, entry);
131 static NetClientInfo net_slirp_info = {
132 .type = NET_CLIENT_TYPE_SLIRP,
133 .size = sizeof(SlirpState),
134 .receive = net_slirp_receive,
135 .cleanup = net_slirp_cleanup,
138 static int net_slirp_init(VLANState *vlan, const char *model,
139 const char *name, int restricted,
140 const char *vnetwork, const char *vhost,
141 const char *vhostname, const char *tftp_export,
142 const char *bootfile, const char *vdhcp_start,
143 const char *vnameserver, const char *smb_export,
144 const char *vsmbserver)
146 /* default settings according to historic slirp */
147 struct in_addr net = { .s_addr = htonl(0x0a000200) }; /* 10.0.2.0 */
148 struct in_addr mask = { .s_addr = htonl(0xffffff00) }; /* 255.255.255.0 */
149 struct in_addr host = { .s_addr = htonl(0x0a000202) }; /* 10.0.2.2 */
150 struct in_addr dhcp = { .s_addr = htonl(0x0a00020f) }; /* 10.0.2.15 */
151 struct in_addr dns = { .s_addr = htonl(0x0a000203) }; /* 10.0.2.3 */
153 struct in_addr smbsrv = { .s_addr = 0 };
161 struct slirp_config_str *config;
164 tftp_export = legacy_tftp_prefix;
167 bootfile = legacy_bootp_filename;
171 if (get_str_sep(buf, sizeof(buf), &vnetwork, '/') < 0) {
172 if (!inet_aton(vnetwork, &net)) {
175 addr = ntohl(net.s_addr);
176 if (!(addr & 0x80000000)) {
177 mask.s_addr = htonl(0xff000000); /* class A */
178 } else if ((addr & 0xfff00000) == 0xac100000) {
179 mask.s_addr = htonl(0xfff00000); /* priv. 172.16.0.0/12 */
180 } else if ((addr & 0xc0000000) == 0x80000000) {
181 mask.s_addr = htonl(0xffff0000); /* class B */
182 } else if ((addr & 0xffff0000) == 0xc0a80000) {
183 mask.s_addr = htonl(0xffff0000); /* priv. 192.168.0.0/16 */
184 } else if ((addr & 0xffff0000) == 0xc6120000) {
185 mask.s_addr = htonl(0xfffe0000); /* tests 198.18.0.0/15 */
186 } else if ((addr & 0xe0000000) == 0xe0000000) {
187 mask.s_addr = htonl(0xffffff00); /* class C */
189 mask.s_addr = htonl(0xfffffff0); /* multicast/reserved */
192 if (!inet_aton(buf, &net)) {
195 shift = strtol(vnetwork, &end, 10);
197 if (!inet_aton(vnetwork, &mask)) {
200 } else if (shift < 4 || shift > 32) {
203 mask.s_addr = htonl(0xffffffff << (32 - shift));
206 net.s_addr &= mask.s_addr;
207 host.s_addr = net.s_addr | (htonl(0x0202) & ~mask.s_addr);
208 dhcp.s_addr = net.s_addr | (htonl(0x020f) & ~mask.s_addr);
209 dns.s_addr = net.s_addr | (htonl(0x0203) & ~mask.s_addr);
212 if (vhost && !inet_aton(vhost, &host)) {
215 if ((host.s_addr & mask.s_addr) != net.s_addr) {
219 if (vdhcp_start && !inet_aton(vdhcp_start, &dhcp)) {
222 if ((dhcp.s_addr & mask.s_addr) != net.s_addr ||
223 dhcp.s_addr == host.s_addr || dhcp.s_addr == dns.s_addr) {
227 if (vnameserver && !inet_aton(vnameserver, &dns)) {
230 if ((dns.s_addr & mask.s_addr) != net.s_addr ||
231 dns.s_addr == host.s_addr) {
236 if (vsmbserver && !inet_aton(vsmbserver, &smbsrv)) {
241 nc = qemu_new_net_client(&net_slirp_info, vlan, NULL, model, name);
243 snprintf(nc->info_str, sizeof(nc->info_str),
244 "net=%s, restricted=%c", inet_ntoa(net), restricted ? 'y' : 'n');
246 s = DO_UPCAST(SlirpState, nc, nc);
248 s->slirp = slirp_init(restricted, net, mask, host, vhostname,
249 tftp_export, bootfile, dhcp, dns, s);
250 QTAILQ_INSERT_TAIL(&slirp_stacks, s, entry);
252 for (config = slirp_configs; config; config = config->next) {
253 if (config->flags & SLIRP_CFG_HOSTFWD) {
254 if (slirp_hostfwd(s, config->str,
255 config->flags & SLIRP_CFG_LEGACY) < 0)
258 if (slirp_guestfwd(s, config->str,
259 config->flags & SLIRP_CFG_LEGACY) < 0)
265 smb_export = legacy_smb_export;
268 if (slirp_smb(s, smb_export, smbsrv) < 0)
276 qemu_del_vlan_client(nc);
280 static SlirpState *slirp_lookup(Monitor *mon, const char *vlan,
286 nc = qemu_find_vlan_client_by_name(mon, strtol(vlan, NULL, 0), stack);
290 if (strcmp(nc->model, "user")) {
291 monitor_printf(mon, "invalid device specified\n");
294 return DO_UPCAST(SlirpState, nc, nc);
296 if (QTAILQ_EMPTY(&slirp_stacks)) {
297 monitor_printf(mon, "user mode network stack not in use\n");
300 return QTAILQ_FIRST(&slirp_stacks);
304 void net_slirp_hostfwd_remove(Monitor *mon, const QDict *qdict)
306 struct in_addr host_addr = { .s_addr = INADDR_ANY };
309 const char *src_str, *p;
313 const char *arg1 = qdict_get_str(qdict, "arg1");
314 const char *arg2 = qdict_get_try_str(qdict, "arg2");
315 const char *arg3 = qdict_get_try_str(qdict, "arg3");
318 s = slirp_lookup(mon, arg1, arg2);
321 s = slirp_lookup(mon, NULL, NULL);
328 if (!src_str || !src_str[0])
332 get_str_sep(buf, sizeof(buf), &p, ':');
334 if (!strcmp(buf, "tcp") || buf[0] == '\0') {
336 } else if (!strcmp(buf, "udp")) {
342 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
345 if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
351 err = slirp_remove_hostfwd(QTAILQ_FIRST(&slirp_stacks)->slirp, is_udp,
352 host_addr, host_port);
354 monitor_printf(mon, "host forwarding rule for %s %s\n", src_str,
355 err ? "removed" : "not found");
359 monitor_printf(mon, "invalid format\n");
362 static int slirp_hostfwd(SlirpState *s, const char *redir_str,
365 struct in_addr host_addr = { .s_addr = INADDR_ANY };
366 struct in_addr guest_addr = { .s_addr = 0 };
367 int host_port, guest_port;
374 if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
377 if (!strcmp(buf, "tcp") || buf[0] == '\0') {
379 } else if (!strcmp(buf, "udp")) {
385 if (!legacy_format) {
386 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
389 if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
394 if (get_str_sep(buf, sizeof(buf), &p, legacy_format ? ':' : '-') < 0) {
397 host_port = strtol(buf, &end, 0);
398 if (*end != '\0' || host_port < 1 || host_port > 65535) {
402 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
405 if (buf[0] != '\0' && !inet_aton(buf, &guest_addr)) {
409 guest_port = strtol(p, &end, 0);
410 if (*end != '\0' || guest_port < 1 || guest_port > 65535) {
414 if (slirp_add_hostfwd(s->slirp, is_udp, host_addr, host_port, guest_addr,
416 error_report("could not set up host forwarding rule '%s'",
423 error_report("invalid host forwarding rule '%s'", redir_str);
427 void net_slirp_hostfwd_add(Monitor *mon, const QDict *qdict)
429 const char *redir_str;
431 const char *arg1 = qdict_get_str(qdict, "arg1");
432 const char *arg2 = qdict_get_try_str(qdict, "arg2");
433 const char *arg3 = qdict_get_try_str(qdict, "arg3");
436 s = slirp_lookup(mon, arg1, arg2);
439 s = slirp_lookup(mon, NULL, NULL);
443 slirp_hostfwd(s, redir_str, 0);
448 int net_slirp_redir(const char *redir_str)
450 struct slirp_config_str *config;
452 if (QTAILQ_EMPTY(&slirp_stacks)) {
453 config = qemu_malloc(sizeof(*config));
454 pstrcpy(config->str, sizeof(config->str), redir_str);
455 config->flags = SLIRP_CFG_HOSTFWD | SLIRP_CFG_LEGACY;
456 config->next = slirp_configs;
457 slirp_configs = config;
461 return slirp_hostfwd(QTAILQ_FIRST(&slirp_stacks), redir_str, 1);
466 /* automatic user mode samba server configuration */
467 static void slirp_smb_cleanup(SlirpState *s)
472 if (s->smb_dir[0] != '\0') {
473 snprintf(cmd, sizeof(cmd), "rm -rf %s", s->smb_dir);
475 if (ret == -1 || !WIFEXITED(ret)) {
476 error_report("'%s' failed.", cmd);
477 } else if (WEXITSTATUS(ret)) {
478 error_report("'%s' failed. Error code: %d",
479 cmd, WEXITSTATUS(ret));
481 s->smb_dir[0] = '\0';
485 static int slirp_smb(SlirpState* s, const char *exported_dir,
486 struct in_addr vserver_addr)
490 char smb_cmdline[128];
493 snprintf(s->smb_dir, sizeof(s->smb_dir), "/tmp/qemu-smb.%ld-%d",
494 (long)getpid(), instance++);
495 if (mkdir(s->smb_dir, 0700) < 0) {
496 error_report("could not create samba server dir '%s'", s->smb_dir);
499 snprintf(smb_conf, sizeof(smb_conf), "%s/%s", s->smb_dir, "smb.conf");
501 f = fopen(smb_conf, "w");
503 slirp_smb_cleanup(s);
504 error_report("could not create samba server configuration file '%s'",
512 "socket address=127.0.0.1\n"
514 "lock directory=%s\n"
515 "log file=%s/log.smbd\n"
516 "smb passwd file=%s/smbpasswd\n"
531 snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -s %s",
532 SMBD_COMMAND, smb_conf);
534 if (slirp_add_exec(s->slirp, 0, smb_cmdline, &vserver_addr, 139) < 0) {
535 slirp_smb_cleanup(s);
536 error_report("conflicting/invalid smbserver address");
542 /* automatic user mode samba server configuration (legacy interface) */
543 int net_slirp_smb(const char *exported_dir)
545 struct in_addr vserver_addr = { .s_addr = 0 };
547 if (legacy_smb_export) {
548 fprintf(stderr, "-smb given twice\n");
551 legacy_smb_export = exported_dir;
552 if (!QTAILQ_EMPTY(&slirp_stacks)) {
553 return slirp_smb(QTAILQ_FIRST(&slirp_stacks), exported_dir,
559 #endif /* !defined(_WIN32) */
563 struct in_addr server;
568 static int guestfwd_can_read(void *opaque)
570 struct GuestFwd *fwd = opaque;
571 return slirp_socket_can_recv(fwd->slirp, fwd->server, fwd->port);
574 static void guestfwd_read(void *opaque, const uint8_t *buf, int size)
576 struct GuestFwd *fwd = opaque;
577 slirp_socket_recv(fwd->slirp, fwd->server, fwd->port, buf, size);
580 static int slirp_guestfwd(SlirpState *s, const char *config_str,
583 struct in_addr server = { .s_addr = 0 };
584 struct GuestFwd *fwd;
592 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
596 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
599 if (strcmp(buf, "tcp") && buf[0] != '\0') {
602 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
605 if (buf[0] != '\0' && !inet_aton(buf, &server)) {
608 if (get_str_sep(buf, sizeof(buf), &p, '-') < 0) {
612 port = strtol(buf, &end, 10);
613 if (*end != '\0' || port < 1 || port > 65535) {
617 fwd = qemu_malloc(sizeof(struct GuestFwd));
618 snprintf(buf, sizeof(buf), "guestfwd.tcp:%d", port);
619 fwd->hd = qemu_chr_open(buf, p, NULL);
621 error_report("could not open guest forwarding device '%s'", buf);
626 if (slirp_add_exec(s->slirp, 3, fwd->hd, &server, port) < 0) {
627 error_report("conflicting/invalid host:port in guest forwarding "
628 "rule '%s'", config_str);
632 fwd->server = server;
634 fwd->slirp = s->slirp;
636 qemu_chr_add_handlers(fwd->hd, guestfwd_can_read, guestfwd_read,
641 error_report("invalid guest forwarding rule '%s'", config_str);
645 void do_info_usernet(Monitor *mon)
649 QTAILQ_FOREACH(s, &slirp_stacks, entry) {
650 monitor_printf(mon, "VLAN %d (%s):\n",
651 s->nc.vlan ? s->nc.vlan->id : -1,
653 slirp_connection_info(s->slirp, mon);
657 static int net_init_slirp_configs(const char *name, const char *value, void *opaque)
659 struct slirp_config_str *config;
661 if (strcmp(name, "hostfwd") != 0 && strcmp(name, "guestfwd") != 0) {
665 config = qemu_mallocz(sizeof(*config));
667 pstrcpy(config->str, sizeof(config->str), value);
669 if (!strcmp(name, "hostfwd")) {
670 config->flags = SLIRP_CFG_HOSTFWD;
673 config->next = slirp_configs;
674 slirp_configs = config;
679 int net_init_slirp(QemuOpts *opts,
684 struct slirp_config_str *config;
686 const char *vhostname;
687 const char *vdhcp_start;
688 const char *vnamesrv;
689 const char *tftp_export;
690 const char *bootfile;
691 const char *smb_export;
697 vhost = qemu_opt_get(opts, "host");
698 vhostname = qemu_opt_get(opts, "hostname");
699 vdhcp_start = qemu_opt_get(opts, "dhcpstart");
700 vnamesrv = qemu_opt_get(opts, "dns");
701 tftp_export = qemu_opt_get(opts, "tftp");
702 bootfile = qemu_opt_get(opts, "bootfile");
703 smb_export = qemu_opt_get(opts, "smb");
704 vsmbsrv = qemu_opt_get(opts, "smbserver");
706 if (qemu_opt_get(opts, "ip")) {
707 const char *ip = qemu_opt_get(opts, "ip");
708 int l = strlen(ip) + strlen("/24") + 1;
710 vnet = qemu_malloc(l);
712 /* emulate legacy ip= parameter */
713 pstrcpy(vnet, l, ip);
714 pstrcat(vnet, l, "/24");
717 if (qemu_opt_get(opts, "net")) {
721 vnet = qemu_strdup(qemu_opt_get(opts, "net"));
724 if (qemu_opt_get(opts, "restrict") &&
725 qemu_opt_get(opts, "restrict")[0] == 'y') {
729 qemu_opt_foreach(opts, net_init_slirp_configs, NULL, 0);
731 ret = net_slirp_init(vlan, "user", name, restricted, vnet, vhost,
732 vhostname, tftp_export, bootfile, vdhcp_start,
733 vnamesrv, smb_export, vsmbsrv);
735 while (slirp_configs) {
736 config = slirp_configs;
737 slirp_configs = config->next;
746 int net_slirp_parse_legacy(QemuOptsList *opts_list, const char *optarg, int *ret)
748 if (strcmp(opts_list->name, "net") != 0 ||
749 strncmp(optarg, "channel,", strlen("channel,")) != 0) {
753 /* handle legacy -net channel,port:chr */
754 optarg += strlen("channel,");
756 if (QTAILQ_EMPTY(&slirp_stacks)) {
757 struct slirp_config_str *config;
759 config = qemu_malloc(sizeof(*config));
760 pstrcpy(config->str, sizeof(config->str), optarg);
761 config->flags = SLIRP_CFG_LEGACY;
762 config->next = slirp_configs;
763 slirp_configs = config;
766 *ret = slirp_guestfwd(QTAILQ_FIRST(&slirp_stacks), optarg, 1);