root / net / slirp.c @ a9899996
History | View | Annotate | Download (21.2 kB)
1 |
/*
|
---|---|
2 |
* QEMU System Emulator
|
3 |
*
|
4 |
* Copyright (c) 2003-2008 Fabrice Bellard
|
5 |
*
|
6 |
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
7 |
* of this software and associated documentation files (the "Software"), to deal
|
8 |
* in the Software without restriction, including without limitation the rights
|
9 |
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
10 |
* copies of the Software, and to permit persons to whom the Software is
|
11 |
* furnished to do so, subject to the following conditions:
|
12 |
*
|
13 |
* The above copyright notice and this permission notice shall be included in
|
14 |
* all copies or substantial portions of the Software.
|
15 |
*
|
16 |
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
17 |
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
18 |
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
19 |
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
20 |
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
21 |
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
22 |
* THE SOFTWARE.
|
23 |
*/
|
24 |
#include "net/slirp.h" |
25 |
|
26 |
#include "config-host.h" |
27 |
|
28 |
#ifndef _WIN32
|
29 |
#include <sys/wait.h> |
30 |
#endif
|
31 |
#include "net.h" |
32 |
#include "monitor.h" |
33 |
#include "qemu_socket.h" |
34 |
#include "slirp/libslirp.h" |
35 |
|
36 |
static int get_str_sep(char *buf, int buf_size, const char **pp, int sep) |
37 |
{ |
38 |
const char *p, *p1; |
39 |
int len;
|
40 |
p = *pp; |
41 |
p1 = strchr(p, sep); |
42 |
if (!p1)
|
43 |
return -1; |
44 |
len = p1 - p; |
45 |
p1++; |
46 |
if (buf_size > 0) { |
47 |
if (len > buf_size - 1) |
48 |
len = buf_size - 1;
|
49 |
memcpy(buf, p, len); |
50 |
buf[len] = '\0';
|
51 |
} |
52 |
*pp = p1; |
53 |
return 0; |
54 |
} |
55 |
|
56 |
/* slirp network adapter */
|
57 |
|
58 |
#define SLIRP_CFG_HOSTFWD 1 |
59 |
#define SLIRP_CFG_LEGACY 2 |
60 |
|
61 |
struct slirp_config_str {
|
62 |
struct slirp_config_str *next;
|
63 |
int flags;
|
64 |
char str[1024]; |
65 |
int legacy_format;
|
66 |
}; |
67 |
|
68 |
typedef struct SlirpState { |
69 |
VLANClientState nc; |
70 |
QTAILQ_ENTRY(SlirpState) entry; |
71 |
Slirp *slirp; |
72 |
#ifndef _WIN32
|
73 |
char smb_dir[128]; |
74 |
#endif
|
75 |
} SlirpState; |
76 |
|
77 |
static struct slirp_config_str *slirp_configs; |
78 |
const char *legacy_tftp_prefix; |
79 |
const char *legacy_bootp_filename; |
80 |
static QTAILQ_HEAD(slirp_stacks, SlirpState) slirp_stacks =
|
81 |
QTAILQ_HEAD_INITIALIZER(slirp_stacks); |
82 |
|
83 |
static int slirp_hostfwd(SlirpState *s, const char *redir_str, |
84 |
int legacy_format);
|
85 |
static int slirp_guestfwd(SlirpState *s, const char *config_str, |
86 |
int legacy_format);
|
87 |
|
88 |
#ifndef _WIN32
|
89 |
static const char *legacy_smb_export; |
90 |
|
91 |
static int slirp_smb(SlirpState *s, const char *exported_dir, |
92 |
struct in_addr vserver_addr);
|
93 |
static void slirp_smb_cleanup(SlirpState *s); |
94 |
#else
|
95 |
static inline void slirp_smb_cleanup(SlirpState *s) { } |
96 |
#endif
|
97 |
|
98 |
int slirp_can_output(void *opaque) |
99 |
{ |
100 |
SlirpState *s = opaque; |
101 |
|
102 |
return qemu_can_send_packet(&s->nc);
|
103 |
} |
104 |
|
105 |
void slirp_output(void *opaque, const uint8_t *pkt, int pkt_len) |
106 |
{ |
107 |
SlirpState *s = opaque; |
108 |
|
109 |
qemu_send_packet(&s->nc, pkt, pkt_len); |
110 |
} |
111 |
|
112 |
static ssize_t net_slirp_receive(VLANClientState *nc, const uint8_t *buf, size_t size) |
113 |
{ |
114 |
SlirpState *s = DO_UPCAST(SlirpState, nc, nc); |
115 |
|
116 |
slirp_input(s->slirp, buf, size); |
117 |
|
118 |
return size;
|
119 |
} |
120 |
|
121 |
static void net_slirp_cleanup(VLANClientState *nc) |
122 |
{ |
123 |
SlirpState *s = DO_UPCAST(SlirpState, nc, nc); |
124 |
|
125 |
slirp_cleanup(s->slirp); |
126 |
slirp_smb_cleanup(s); |
127 |
QTAILQ_REMOVE(&slirp_stacks, s, entry); |
128 |
} |
129 |
|
130 |
static NetClientInfo net_slirp_info = {
|
131 |
.type = NET_CLIENT_TYPE_SLIRP, |
132 |
.size = sizeof(SlirpState),
|
133 |
.receive = net_slirp_receive, |
134 |
.cleanup = net_slirp_cleanup, |
135 |
}; |
136 |
|
137 |
static int net_slirp_init(VLANState *vlan, const char *model, |
138 |
const char *name, int restricted, |
139 |
const char *vnetwork, const char *vhost, |
140 |
const char *vhostname, const char *tftp_export, |
141 |
const char *bootfile, const char *vdhcp_start, |
142 |
const char *vnameserver, const char *smb_export, |
143 |
const char *vsmbserver) |
144 |
{ |
145 |
/* default settings according to historic slirp */
|
146 |
struct in_addr net = { .s_addr = htonl(0x0a000200) }; /* 10.0.2.0 */ |
147 |
struct in_addr mask = { .s_addr = htonl(0xffffff00) }; /* 255.255.255.0 */ |
148 |
struct in_addr host = { .s_addr = htonl(0x0a000202) }; /* 10.0.2.2 */ |
149 |
struct in_addr dhcp = { .s_addr = htonl(0x0a00020f) }; /* 10.0.2.15 */ |
150 |
struct in_addr dns = { .s_addr = htonl(0x0a000203) }; /* 10.0.2.3 */ |
151 |
#ifndef _WIN32
|
152 |
struct in_addr smbsrv = { .s_addr = 0 }; |
153 |
#endif
|
154 |
VLANClientState *nc; |
155 |
SlirpState *s; |
156 |
char buf[20]; |
157 |
uint32_t addr; |
158 |
int shift;
|
159 |
char *end;
|
160 |
struct slirp_config_str *config;
|
161 |
|
162 |
if (!tftp_export) {
|
163 |
tftp_export = legacy_tftp_prefix; |
164 |
} |
165 |
if (!bootfile) {
|
166 |
bootfile = legacy_bootp_filename; |
167 |
} |
168 |
|
169 |
if (vnetwork) {
|
170 |
if (get_str_sep(buf, sizeof(buf), &vnetwork, '/') < 0) { |
171 |
if (!inet_aton(vnetwork, &net)) {
|
172 |
return -1; |
173 |
} |
174 |
addr = ntohl(net.s_addr); |
175 |
if (!(addr & 0x80000000)) { |
176 |
mask.s_addr = htonl(0xff000000); /* class A */ |
177 |
} else if ((addr & 0xfff00000) == 0xac100000) { |
178 |
mask.s_addr = htonl(0xfff00000); /* priv. 172.16.0.0/12 */ |
179 |
} else if ((addr & 0xc0000000) == 0x80000000) { |
180 |
mask.s_addr = htonl(0xffff0000); /* class B */ |
181 |
} else if ((addr & 0xffff0000) == 0xc0a80000) { |
182 |
mask.s_addr = htonl(0xffff0000); /* priv. 192.168.0.0/16 */ |
183 |
} else if ((addr & 0xffff0000) == 0xc6120000) { |
184 |
mask.s_addr = htonl(0xfffe0000); /* tests 198.18.0.0/15 */ |
185 |
} else if ((addr & 0xe0000000) == 0xe0000000) { |
186 |
mask.s_addr = htonl(0xffffff00); /* class C */ |
187 |
} else {
|
188 |
mask.s_addr = htonl(0xfffffff0); /* multicast/reserved */ |
189 |
} |
190 |
} else {
|
191 |
if (!inet_aton(buf, &net)) {
|
192 |
return -1; |
193 |
} |
194 |
shift = strtol(vnetwork, &end, 10);
|
195 |
if (*end != '\0') { |
196 |
if (!inet_aton(vnetwork, &mask)) {
|
197 |
return -1; |
198 |
} |
199 |
} else if (shift < 4 || shift > 32) { |
200 |
return -1; |
201 |
} else {
|
202 |
mask.s_addr = htonl(0xffffffff << (32 - shift)); |
203 |
} |
204 |
} |
205 |
net.s_addr &= mask.s_addr; |
206 |
host.s_addr = net.s_addr | (htonl(0x0202) & ~mask.s_addr);
|
207 |
dhcp.s_addr = net.s_addr | (htonl(0x020f) & ~mask.s_addr);
|
208 |
dns.s_addr = net.s_addr | (htonl(0x0203) & ~mask.s_addr);
|
209 |
} |
210 |
|
211 |
if (vhost && !inet_aton(vhost, &host)) {
|
212 |
return -1; |
213 |
} |
214 |
if ((host.s_addr & mask.s_addr) != net.s_addr) {
|
215 |
return -1; |
216 |
} |
217 |
|
218 |
if (vdhcp_start && !inet_aton(vdhcp_start, &dhcp)) {
|
219 |
return -1; |
220 |
} |
221 |
if ((dhcp.s_addr & mask.s_addr) != net.s_addr ||
|
222 |
dhcp.s_addr == host.s_addr || dhcp.s_addr == dns.s_addr) { |
223 |
return -1; |
224 |
} |
225 |
|
226 |
if (vnameserver && !inet_aton(vnameserver, &dns)) {
|
227 |
return -1; |
228 |
} |
229 |
if ((dns.s_addr & mask.s_addr) != net.s_addr ||
|
230 |
dns.s_addr == host.s_addr) { |
231 |
return -1; |
232 |
} |
233 |
|
234 |
#ifndef _WIN32
|
235 |
if (vsmbserver && !inet_aton(vsmbserver, &smbsrv)) {
|
236 |
return -1; |
237 |
} |
238 |
#endif
|
239 |
|
240 |
nc = qemu_new_net_client(&net_slirp_info, vlan, NULL, model, name);
|
241 |
|
242 |
snprintf(nc->info_str, sizeof(nc->info_str),
|
243 |
"net=%s, restricted=%c", inet_ntoa(net), restricted ? 'y' : 'n'); |
244 |
|
245 |
s = DO_UPCAST(SlirpState, nc, nc); |
246 |
|
247 |
s->slirp = slirp_init(restricted, net, mask, host, vhostname, |
248 |
tftp_export, bootfile, dhcp, dns, s); |
249 |
QTAILQ_INSERT_TAIL(&slirp_stacks, s, entry); |
250 |
|
251 |
for (config = slirp_configs; config; config = config->next) {
|
252 |
if (config->flags & SLIRP_CFG_HOSTFWD) {
|
253 |
if (slirp_hostfwd(s, config->str,
|
254 |
config->flags & SLIRP_CFG_LEGACY) < 0)
|
255 |
goto error;
|
256 |
} else {
|
257 |
if (slirp_guestfwd(s, config->str,
|
258 |
config->flags & SLIRP_CFG_LEGACY) < 0)
|
259 |
goto error;
|
260 |
} |
261 |
} |
262 |
#ifndef _WIN32
|
263 |
if (!smb_export) {
|
264 |
smb_export = legacy_smb_export; |
265 |
} |
266 |
if (smb_export) {
|
267 |
if (slirp_smb(s, smb_export, smbsrv) < 0) |
268 |
goto error;
|
269 |
} |
270 |
#endif
|
271 |
|
272 |
return 0; |
273 |
|
274 |
error:
|
275 |
qemu_del_vlan_client(nc); |
276 |
return -1; |
277 |
} |
278 |
|
279 |
static SlirpState *slirp_lookup(Monitor *mon, const char *vlan, |
280 |
const char *stack) |
281 |
{ |
282 |
|
283 |
if (vlan) {
|
284 |
VLANClientState *nc; |
285 |
nc = qemu_find_vlan_client_by_name(mon, strtol(vlan, NULL, 0), stack); |
286 |
if (!nc) {
|
287 |
return NULL; |
288 |
} |
289 |
if (strcmp(nc->model, "user")) { |
290 |
monitor_printf(mon, "invalid device specified\n");
|
291 |
return NULL; |
292 |
} |
293 |
return DO_UPCAST(SlirpState, nc, nc);
|
294 |
} else {
|
295 |
if (QTAILQ_EMPTY(&slirp_stacks)) {
|
296 |
monitor_printf(mon, "user mode network stack not in use\n");
|
297 |
return NULL; |
298 |
} |
299 |
return QTAILQ_FIRST(&slirp_stacks);
|
300 |
} |
301 |
} |
302 |
|
303 |
void net_slirp_hostfwd_remove(Monitor *mon, const QDict *qdict) |
304 |
{ |
305 |
struct in_addr host_addr = { .s_addr = INADDR_ANY };
|
306 |
int host_port;
|
307 |
char buf[256] = ""; |
308 |
const char *src_str, *p; |
309 |
SlirpState *s; |
310 |
int is_udp = 0; |
311 |
int err;
|
312 |
const char *arg1 = qdict_get_str(qdict, "arg1"); |
313 |
const char *arg2 = qdict_get_try_str(qdict, "arg2"); |
314 |
const char *arg3 = qdict_get_try_str(qdict, "arg3"); |
315 |
|
316 |
if (arg2) {
|
317 |
s = slirp_lookup(mon, arg1, arg2); |
318 |
src_str = arg3; |
319 |
} else {
|
320 |
s = slirp_lookup(mon, NULL, NULL); |
321 |
src_str = arg1; |
322 |
} |
323 |
if (!s) {
|
324 |
return;
|
325 |
} |
326 |
|
327 |
if (!src_str || !src_str[0]) |
328 |
goto fail_syntax;
|
329 |
|
330 |
p = src_str; |
331 |
get_str_sep(buf, sizeof(buf), &p, ':'); |
332 |
|
333 |
if (!strcmp(buf, "tcp") || buf[0] == '\0') { |
334 |
is_udp = 0;
|
335 |
} else if (!strcmp(buf, "udp")) { |
336 |
is_udp = 1;
|
337 |
} else {
|
338 |
goto fail_syntax;
|
339 |
} |
340 |
|
341 |
if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { |
342 |
goto fail_syntax;
|
343 |
} |
344 |
if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) { |
345 |
goto fail_syntax;
|
346 |
} |
347 |
|
348 |
host_port = atoi(p); |
349 |
|
350 |
err = slirp_remove_hostfwd(QTAILQ_FIRST(&slirp_stacks)->slirp, is_udp, |
351 |
host_addr, host_port); |
352 |
|
353 |
monitor_printf(mon, "host forwarding rule for %s %s\n", src_str,
|
354 |
err ? "removed" : "not found"); |
355 |
return;
|
356 |
|
357 |
fail_syntax:
|
358 |
monitor_printf(mon, "invalid format\n");
|
359 |
} |
360 |
|
361 |
static int slirp_hostfwd(SlirpState *s, const char *redir_str, |
362 |
int legacy_format)
|
363 |
{ |
364 |
struct in_addr host_addr = { .s_addr = INADDR_ANY };
|
365 |
struct in_addr guest_addr = { .s_addr = 0 }; |
366 |
int host_port, guest_port;
|
367 |
const char *p; |
368 |
char buf[256]; |
369 |
int is_udp;
|
370 |
char *end;
|
371 |
|
372 |
p = redir_str; |
373 |
if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) { |
374 |
goto fail_syntax;
|
375 |
} |
376 |
if (!strcmp(buf, "tcp") || buf[0] == '\0') { |
377 |
is_udp = 0;
|
378 |
} else if (!strcmp(buf, "udp")) { |
379 |
is_udp = 1;
|
380 |
} else {
|
381 |
goto fail_syntax;
|
382 |
} |
383 |
|
384 |
if (!legacy_format) {
|
385 |
if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { |
386 |
goto fail_syntax;
|
387 |
} |
388 |
if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) { |
389 |
goto fail_syntax;
|
390 |
} |
391 |
} |
392 |
|
393 |
if (get_str_sep(buf, sizeof(buf), &p, legacy_format ? ':' : '-') < 0) { |
394 |
goto fail_syntax;
|
395 |
} |
396 |
host_port = strtol(buf, &end, 0);
|
397 |
if (*end != '\0' || host_port < 1 || host_port > 65535) { |
398 |
goto fail_syntax;
|
399 |
} |
400 |
|
401 |
if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { |
402 |
goto fail_syntax;
|
403 |
} |
404 |
if (buf[0] != '\0' && !inet_aton(buf, &guest_addr)) { |
405 |
goto fail_syntax;
|
406 |
} |
407 |
|
408 |
guest_port = strtol(p, &end, 0);
|
409 |
if (*end != '\0' || guest_port < 1 || guest_port > 65535) { |
410 |
goto fail_syntax;
|
411 |
} |
412 |
|
413 |
if (slirp_add_hostfwd(s->slirp, is_udp, host_addr, host_port, guest_addr,
|
414 |
guest_port) < 0) {
|
415 |
error_report("could not set up host forwarding rule '%s'",
|
416 |
redir_str); |
417 |
return -1; |
418 |
} |
419 |
return 0; |
420 |
|
421 |
fail_syntax:
|
422 |
error_report("invalid host forwarding rule '%s'", redir_str);
|
423 |
return -1; |
424 |
} |
425 |
|
426 |
void net_slirp_hostfwd_add(Monitor *mon, const QDict *qdict) |
427 |
{ |
428 |
const char *redir_str; |
429 |
SlirpState *s; |
430 |
const char *arg1 = qdict_get_str(qdict, "arg1"); |
431 |
const char *arg2 = qdict_get_try_str(qdict, "arg2"); |
432 |
const char *arg3 = qdict_get_try_str(qdict, "arg3"); |
433 |
|
434 |
if (arg2) {
|
435 |
s = slirp_lookup(mon, arg1, arg2); |
436 |
redir_str = arg3; |
437 |
} else {
|
438 |
s = slirp_lookup(mon, NULL, NULL); |
439 |
redir_str = arg1; |
440 |
} |
441 |
if (s) {
|
442 |
slirp_hostfwd(s, redir_str, 0);
|
443 |
} |
444 |
|
445 |
} |
446 |
|
447 |
int net_slirp_redir(const char *redir_str) |
448 |
{ |
449 |
struct slirp_config_str *config;
|
450 |
|
451 |
if (QTAILQ_EMPTY(&slirp_stacks)) {
|
452 |
config = qemu_malloc(sizeof(*config));
|
453 |
pstrcpy(config->str, sizeof(config->str), redir_str);
|
454 |
config->flags = SLIRP_CFG_HOSTFWD | SLIRP_CFG_LEGACY; |
455 |
config->next = slirp_configs; |
456 |
slirp_configs = config; |
457 |
return 0; |
458 |
} |
459 |
|
460 |
return slirp_hostfwd(QTAILQ_FIRST(&slirp_stacks), redir_str, 1); |
461 |
} |
462 |
|
463 |
#ifndef _WIN32
|
464 |
|
465 |
/* automatic user mode samba server configuration */
|
466 |
static void slirp_smb_cleanup(SlirpState *s) |
467 |
{ |
468 |
char cmd[128]; |
469 |
int ret;
|
470 |
|
471 |
if (s->smb_dir[0] != '\0') { |
472 |
snprintf(cmd, sizeof(cmd), "rm -rf %s", s->smb_dir); |
473 |
ret = system(cmd); |
474 |
if (ret == -1 || !WIFEXITED(ret)) { |
475 |
error_report("'%s' failed.", cmd);
|
476 |
} else if (WEXITSTATUS(ret)) { |
477 |
error_report("'%s' failed. Error code: %d",
|
478 |
cmd, WEXITSTATUS(ret)); |
479 |
} |
480 |
s->smb_dir[0] = '\0'; |
481 |
} |
482 |
} |
483 |
|
484 |
static int slirp_smb(SlirpState* s, const char *exported_dir, |
485 |
struct in_addr vserver_addr)
|
486 |
{ |
487 |
static int instance; |
488 |
char smb_conf[128]; |
489 |
char smb_cmdline[128]; |
490 |
FILE *f; |
491 |
|
492 |
snprintf(s->smb_dir, sizeof(s->smb_dir), "/tmp/qemu-smb.%ld-%d", |
493 |
(long)getpid(), instance++);
|
494 |
if (mkdir(s->smb_dir, 0700) < 0) { |
495 |
error_report("could not create samba server dir '%s'", s->smb_dir);
|
496 |
return -1; |
497 |
} |
498 |
snprintf(smb_conf, sizeof(smb_conf), "%s/%s", s->smb_dir, "smb.conf"); |
499 |
|
500 |
f = fopen(smb_conf, "w");
|
501 |
if (!f) {
|
502 |
slirp_smb_cleanup(s); |
503 |
error_report("could not create samba server configuration file '%s'",
|
504 |
smb_conf); |
505 |
return -1; |
506 |
} |
507 |
fprintf(f, |
508 |
"[global]\n"
|
509 |
"private dir=%s\n"
|
510 |
"smb ports=0\n"
|
511 |
"socket address=127.0.0.1\n"
|
512 |
"pid directory=%s\n"
|
513 |
"lock directory=%s\n"
|
514 |
"log file=%s/log.smbd\n"
|
515 |
"smb passwd file=%s/smbpasswd\n"
|
516 |
"security = share\n"
|
517 |
"[qemu]\n"
|
518 |
"path=%s\n"
|
519 |
"read only=no\n"
|
520 |
"guest ok=yes\n",
|
521 |
s->smb_dir, |
522 |
s->smb_dir, |
523 |
s->smb_dir, |
524 |
s->smb_dir, |
525 |
s->smb_dir, |
526 |
exported_dir |
527 |
); |
528 |
fclose(f); |
529 |
|
530 |
snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -s %s", |
531 |
SMBD_COMMAND, smb_conf); |
532 |
|
533 |
if (slirp_add_exec(s->slirp, 0, smb_cmdline, &vserver_addr, 139) < 0) { |
534 |
slirp_smb_cleanup(s); |
535 |
error_report("conflicting/invalid smbserver address");
|
536 |
return -1; |
537 |
} |
538 |
return 0; |
539 |
} |
540 |
|
541 |
/* automatic user mode samba server configuration (legacy interface) */
|
542 |
int net_slirp_smb(const char *exported_dir) |
543 |
{ |
544 |
struct in_addr vserver_addr = { .s_addr = 0 }; |
545 |
|
546 |
if (legacy_smb_export) {
|
547 |
fprintf(stderr, "-smb given twice\n");
|
548 |
return -1; |
549 |
} |
550 |
legacy_smb_export = exported_dir; |
551 |
if (!QTAILQ_EMPTY(&slirp_stacks)) {
|
552 |
return slirp_smb(QTAILQ_FIRST(&slirp_stacks), exported_dir,
|
553 |
vserver_addr); |
554 |
} |
555 |
return 0; |
556 |
} |
557 |
|
558 |
#endif /* !defined(_WIN32) */ |
559 |
|
560 |
struct GuestFwd {
|
561 |
CharDriverState *hd; |
562 |
struct in_addr server;
|
563 |
int port;
|
564 |
Slirp *slirp; |
565 |
}; |
566 |
|
567 |
static int guestfwd_can_read(void *opaque) |
568 |
{ |
569 |
struct GuestFwd *fwd = opaque;
|
570 |
return slirp_socket_can_recv(fwd->slirp, fwd->server, fwd->port);
|
571 |
} |
572 |
|
573 |
static void guestfwd_read(void *opaque, const uint8_t *buf, int size) |
574 |
{ |
575 |
struct GuestFwd *fwd = opaque;
|
576 |
slirp_socket_recv(fwd->slirp, fwd->server, fwd->port, buf, size); |
577 |
} |
578 |
|
579 |
static int slirp_guestfwd(SlirpState *s, const char *config_str, |
580 |
int legacy_format)
|
581 |
{ |
582 |
struct in_addr server = { .s_addr = 0 }; |
583 |
struct GuestFwd *fwd;
|
584 |
const char *p; |
585 |
char buf[128]; |
586 |
char *end;
|
587 |
int port;
|
588 |
|
589 |
p = config_str; |
590 |
if (legacy_format) {
|
591 |
if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { |
592 |
goto fail_syntax;
|
593 |
} |
594 |
} else {
|
595 |
if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { |
596 |
goto fail_syntax;
|
597 |
} |
598 |
if (strcmp(buf, "tcp") && buf[0] != '\0') { |
599 |
goto fail_syntax;
|
600 |
} |
601 |
if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { |
602 |
goto fail_syntax;
|
603 |
} |
604 |
if (buf[0] != '\0' && !inet_aton(buf, &server)) { |
605 |
goto fail_syntax;
|
606 |
} |
607 |
if (get_str_sep(buf, sizeof(buf), &p, '-') < 0) { |
608 |
goto fail_syntax;
|
609 |
} |
610 |
} |
611 |
port = strtol(buf, &end, 10);
|
612 |
if (*end != '\0' || port < 1 || port > 65535) { |
613 |
goto fail_syntax;
|
614 |
} |
615 |
|
616 |
fwd = qemu_malloc(sizeof(struct GuestFwd)); |
617 |
snprintf(buf, sizeof(buf), "guestfwd.tcp.%d", port); |
618 |
fwd->hd = qemu_chr_open(buf, p, NULL);
|
619 |
if (!fwd->hd) {
|
620 |
error_report("could not open guest forwarding device '%s'", buf);
|
621 |
qemu_free(fwd); |
622 |
return -1; |
623 |
} |
624 |
|
625 |
if (slirp_add_exec(s->slirp, 3, fwd->hd, &server, port) < 0) { |
626 |
error_report("conflicting/invalid host:port in guest forwarding "
|
627 |
"rule '%s'", config_str);
|
628 |
qemu_free(fwd); |
629 |
return -1; |
630 |
} |
631 |
fwd->server = server; |
632 |
fwd->port = port; |
633 |
fwd->slirp = s->slirp; |
634 |
|
635 |
qemu_chr_add_handlers(fwd->hd, guestfwd_can_read, guestfwd_read, |
636 |
NULL, fwd);
|
637 |
return 0; |
638 |
|
639 |
fail_syntax:
|
640 |
error_report("invalid guest forwarding rule '%s'", config_str);
|
641 |
return -1; |
642 |
} |
643 |
|
644 |
void do_info_usernet(Monitor *mon)
|
645 |
{ |
646 |
SlirpState *s; |
647 |
|
648 |
QTAILQ_FOREACH(s, &slirp_stacks, entry) { |
649 |
monitor_printf(mon, "VLAN %d (%s):\n",
|
650 |
s->nc.vlan ? s->nc.vlan->id : -1,
|
651 |
s->nc.name); |
652 |
slirp_connection_info(s->slirp, mon); |
653 |
} |
654 |
} |
655 |
|
656 |
static int net_init_slirp_configs(const char *name, const char *value, void *opaque) |
657 |
{ |
658 |
struct slirp_config_str *config;
|
659 |
|
660 |
if (strcmp(name, "hostfwd") != 0 && strcmp(name, "guestfwd") != 0) { |
661 |
return 0; |
662 |
} |
663 |
|
664 |
config = qemu_mallocz(sizeof(*config));
|
665 |
|
666 |
pstrcpy(config->str, sizeof(config->str), value);
|
667 |
|
668 |
if (!strcmp(name, "hostfwd")) { |
669 |
config->flags = SLIRP_CFG_HOSTFWD; |
670 |
} |
671 |
|
672 |
config->next = slirp_configs; |
673 |
slirp_configs = config; |
674 |
|
675 |
return 0; |
676 |
} |
677 |
|
678 |
int net_init_slirp(QemuOpts *opts,
|
679 |
Monitor *mon, |
680 |
const char *name, |
681 |
VLANState *vlan) |
682 |
{ |
683 |
struct slirp_config_str *config;
|
684 |
const char *vhost; |
685 |
const char *vhostname; |
686 |
const char *vdhcp_start; |
687 |
const char *vnamesrv; |
688 |
const char *tftp_export; |
689 |
const char *bootfile; |
690 |
const char *smb_export; |
691 |
const char *vsmbsrv; |
692 |
char *vnet = NULL; |
693 |
int restricted = 0; |
694 |
int ret;
|
695 |
|
696 |
vhost = qemu_opt_get(opts, "host");
|
697 |
vhostname = qemu_opt_get(opts, "hostname");
|
698 |
vdhcp_start = qemu_opt_get(opts, "dhcpstart");
|
699 |
vnamesrv = qemu_opt_get(opts, "dns");
|
700 |
tftp_export = qemu_opt_get(opts, "tftp");
|
701 |
bootfile = qemu_opt_get(opts, "bootfile");
|
702 |
smb_export = qemu_opt_get(opts, "smb");
|
703 |
vsmbsrv = qemu_opt_get(opts, "smbserver");
|
704 |
|
705 |
if (qemu_opt_get(opts, "ip")) { |
706 |
const char *ip = qemu_opt_get(opts, "ip"); |
707 |
int l = strlen(ip) + strlen("/24") + 1; |
708 |
|
709 |
vnet = qemu_malloc(l); |
710 |
|
711 |
/* emulate legacy ip= parameter */
|
712 |
pstrcpy(vnet, l, ip); |
713 |
pstrcat(vnet, l, "/24");
|
714 |
} |
715 |
|
716 |
if (qemu_opt_get(opts, "net")) { |
717 |
if (vnet) {
|
718 |
qemu_free(vnet); |
719 |
} |
720 |
vnet = qemu_strdup(qemu_opt_get(opts, "net"));
|
721 |
} |
722 |
|
723 |
if (qemu_opt_get(opts, "restrict") && |
724 |
qemu_opt_get(opts, "restrict")[0] == 'y') { |
725 |
restricted = 1;
|
726 |
} |
727 |
|
728 |
qemu_opt_foreach(opts, net_init_slirp_configs, NULL, 0); |
729 |
|
730 |
ret = net_slirp_init(vlan, "user", name, restricted, vnet, vhost,
|
731 |
vhostname, tftp_export, bootfile, vdhcp_start, |
732 |
vnamesrv, smb_export, vsmbsrv); |
733 |
|
734 |
while (slirp_configs) {
|
735 |
config = slirp_configs; |
736 |
slirp_configs = config->next; |
737 |
qemu_free(config); |
738 |
} |
739 |
|
740 |
qemu_free(vnet); |
741 |
|
742 |
return ret;
|
743 |
} |
744 |
|
745 |
int net_slirp_parse_legacy(QemuOptsList *opts_list, const char *optarg, int *ret) |
746 |
{ |
747 |
if (strcmp(opts_list->name, "net") != 0 || |
748 |
strncmp(optarg, "channel,", strlen("channel,")) != 0) { |
749 |
return 0; |
750 |
} |
751 |
|
752 |
/* handle legacy -net channel,port:chr */
|
753 |
optarg += strlen("channel,");
|
754 |
|
755 |
if (QTAILQ_EMPTY(&slirp_stacks)) {
|
756 |
struct slirp_config_str *config;
|
757 |
|
758 |
config = qemu_malloc(sizeof(*config));
|
759 |
pstrcpy(config->str, sizeof(config->str), optarg);
|
760 |
config->flags = SLIRP_CFG_LEGACY; |
761 |
config->next = slirp_configs; |
762 |
slirp_configs = config; |
763 |
*ret = 0;
|
764 |
} else {
|
765 |
*ret = slirp_guestfwd(QTAILQ_FIRST(&slirp_stacks), optarg, 1);
|
766 |
} |
767 |
|
768 |
return 1; |
769 |
} |
770 |
|