root / util / qemu-sockets.c @ a8aec295
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/*
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* inet and unix socket functions for qemu
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*
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* (c) 2008 Gerd Hoffmann <kraxel@redhat.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; under version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* Contributions after 2012-01-13 are licensed under the terms of the
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* GNU GPL, version 2 or (at your option) any later version.
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*/
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <ctype.h> |
22 |
#include <errno.h> |
23 |
#include <unistd.h> |
24 |
|
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#include "monitor/monitor.h" |
26 |
#include "qemu/sockets.h" |
27 |
#include "qemu/main-loop.h" |
28 |
|
29 |
#ifndef AI_ADDRCONFIG
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# define AI_ADDRCONFIG 0 |
31 |
#endif
|
32 |
|
33 |
static const int on=1, off=0; |
34 |
|
35 |
/* used temporarily until all users are converted to QemuOpts */
|
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QemuOptsList socket_optslist = { |
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.name = "socket",
|
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.head = QTAILQ_HEAD_INITIALIZER(socket_optslist.head), |
39 |
.desc = { |
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{ |
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.name = "path",
|
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.type = QEMU_OPT_STRING, |
43 |
},{ |
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.name = "host",
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.type = QEMU_OPT_STRING, |
46 |
},{ |
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.name = "port",
|
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.type = QEMU_OPT_STRING, |
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},{ |
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.name = "to",
|
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.type = QEMU_OPT_NUMBER, |
52 |
},{ |
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.name = "ipv4",
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.type = QEMU_OPT_BOOL, |
55 |
},{ |
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.name = "ipv6",
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.type = QEMU_OPT_BOOL, |
58 |
}, |
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{ /* end if list */ }
|
60 |
}, |
61 |
}; |
62 |
|
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static int inet_getport(struct addrinfo *e) |
64 |
{ |
65 |
struct sockaddr_in *i4;
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struct sockaddr_in6 *i6;
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|
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switch (e->ai_family) {
|
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case PF_INET6:
|
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i6 = (void*)e->ai_addr;
|
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return ntohs(i6->sin6_port);
|
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case PF_INET:
|
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i4 = (void*)e->ai_addr;
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return ntohs(i4->sin_port);
|
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default:
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return 0; |
77 |
} |
78 |
} |
79 |
|
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static void inet_setport(struct addrinfo *e, int port) |
81 |
{ |
82 |
struct sockaddr_in *i4;
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struct sockaddr_in6 *i6;
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84 |
|
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switch (e->ai_family) {
|
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case PF_INET6:
|
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i6 = (void*)e->ai_addr;
|
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i6->sin6_port = htons(port); |
89 |
break;
|
90 |
case PF_INET:
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i4 = (void*)e->ai_addr;
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i4->sin_port = htons(port); |
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break;
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} |
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} |
96 |
|
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const char *inet_strfamily(int family) |
98 |
{ |
99 |
switch (family) {
|
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case PF_INET6: return "ipv6"; |
101 |
case PF_INET: return "ipv4"; |
102 |
case PF_UNIX: return "unix"; |
103 |
} |
104 |
return "unknown"; |
105 |
} |
106 |
|
107 |
int inet_listen_opts(QemuOpts *opts, int port_offset, Error **errp) |
108 |
{ |
109 |
struct addrinfo ai,*res,*e;
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const char *addr; |
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char port[33]; |
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char uaddr[INET6_ADDRSTRLEN+1]; |
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char uport[33]; |
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int slisten, rc, to, port_min, port_max, p;
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|
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memset(&ai,0, sizeof(ai)); |
117 |
ai.ai_flags = AI_PASSIVE | AI_ADDRCONFIG; |
118 |
ai.ai_family = PF_UNSPEC; |
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ai.ai_socktype = SOCK_STREAM; |
120 |
|
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if ((qemu_opt_get(opts, "host") == NULL) || |
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(qemu_opt_get(opts, "port") == NULL)) { |
123 |
error_setg(errp, "host and/or port not specified");
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return -1; |
125 |
} |
126 |
pstrcpy(port, sizeof(port), qemu_opt_get(opts, "port")); |
127 |
addr = qemu_opt_get(opts, "host");
|
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|
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to = qemu_opt_get_number(opts, "to", 0); |
130 |
if (qemu_opt_get_bool(opts, "ipv4", 0)) |
131 |
ai.ai_family = PF_INET; |
132 |
if (qemu_opt_get_bool(opts, "ipv6", 0)) |
133 |
ai.ai_family = PF_INET6; |
134 |
|
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/* lookup */
|
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if (port_offset)
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snprintf(port, sizeof(port), "%d", atoi(port) + port_offset); |
138 |
rc = getaddrinfo(strlen(addr) ? addr : NULL, port, &ai, &res);
|
139 |
if (rc != 0) { |
140 |
error_setg(errp, "address resolution failed for %s:%s: %s", addr, port,
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gai_strerror(rc)); |
142 |
return -1; |
143 |
} |
144 |
|
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/* create socket + bind */
|
146 |
for (e = res; e != NULL; e = e->ai_next) { |
147 |
getnameinfo((struct sockaddr*)e->ai_addr,e->ai_addrlen,
|
148 |
uaddr,INET6_ADDRSTRLEN,uport,32,
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NI_NUMERICHOST | NI_NUMERICSERV); |
150 |
slisten = qemu_socket(e->ai_family, e->ai_socktype, e->ai_protocol); |
151 |
if (slisten < 0) { |
152 |
if (!e->ai_next) {
|
153 |
error_set_errno(errp, errno, QERR_SOCKET_CREATE_FAILED); |
154 |
} |
155 |
continue;
|
156 |
} |
157 |
|
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qemu_setsockopt(slisten, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
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#ifdef IPV6_V6ONLY
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160 |
if (e->ai_family == PF_INET6) {
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161 |
/* listen on both ipv4 and ipv6 */
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qemu_setsockopt(slisten, IPPROTO_IPV6, IPV6_V6ONLY, &off, |
163 |
sizeof(off));
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164 |
} |
165 |
#endif
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166 |
|
167 |
port_min = inet_getport(e); |
168 |
port_max = to ? to + port_offset : port_min; |
169 |
for (p = port_min; p <= port_max; p++) {
|
170 |
inet_setport(e, p); |
171 |
if (bind(slisten, e->ai_addr, e->ai_addrlen) == 0) { |
172 |
goto listen;
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173 |
} |
174 |
if (p == port_max) {
|
175 |
if (!e->ai_next) {
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error_set_errno(errp, errno, QERR_SOCKET_BIND_FAILED); |
177 |
} |
178 |
} |
179 |
} |
180 |
closesocket(slisten); |
181 |
} |
182 |
freeaddrinfo(res); |
183 |
return -1; |
184 |
|
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listen:
|
186 |
if (listen(slisten,1) != 0) { |
187 |
error_set_errno(errp, errno, QERR_SOCKET_LISTEN_FAILED); |
188 |
closesocket(slisten); |
189 |
freeaddrinfo(res); |
190 |
return -1; |
191 |
} |
192 |
snprintf(uport, sizeof(uport), "%d", inet_getport(e) - port_offset); |
193 |
qemu_opt_set(opts, "host", uaddr);
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qemu_opt_set(opts, "port", uport);
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qemu_opt_set(opts, "ipv6", (e->ai_family == PF_INET6) ? "on" : "off"); |
196 |
qemu_opt_set(opts, "ipv4", (e->ai_family != PF_INET6) ? "on" : "off"); |
197 |
freeaddrinfo(res); |
198 |
return slisten;
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} |
200 |
|
201 |
#ifdef _WIN32
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#define QEMU_SOCKET_RC_INPROGRESS(rc) \
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((rc) == -EINPROGRESS || (rc) == -EWOULDBLOCK || (rc) == -WSAEALREADY) |
204 |
#else
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205 |
#define QEMU_SOCKET_RC_INPROGRESS(rc) \
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((rc) == -EINPROGRESS) |
207 |
#endif
|
208 |
|
209 |
/* Struct to store connect state for non blocking connect */
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210 |
typedef struct ConnectState { |
211 |
int fd;
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struct addrinfo *addr_list;
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struct addrinfo *current_addr;
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214 |
NonBlockingConnectHandler *callback; |
215 |
void *opaque;
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216 |
} ConnectState; |
217 |
|
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static int inet_connect_addr(struct addrinfo *addr, bool *in_progress, |
219 |
ConnectState *connect_state, Error **errp); |
220 |
|
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static void wait_for_connect(void *opaque) |
222 |
{ |
223 |
ConnectState *s = opaque; |
224 |
int val = 0, rc = 0; |
225 |
socklen_t valsize = sizeof(val);
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bool in_progress;
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227 |
|
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qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL); |
229 |
|
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do {
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rc = qemu_getsockopt(s->fd, SOL_SOCKET, SO_ERROR, &val, &valsize); |
232 |
} while (rc == -1 && socket_error() == EINTR); |
233 |
|
234 |
/* update rc to contain error */
|
235 |
if (!rc && val) {
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rc = -1;
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237 |
} |
238 |
|
239 |
/* connect error */
|
240 |
if (rc < 0) { |
241 |
closesocket(s->fd); |
242 |
s->fd = rc; |
243 |
} |
244 |
|
245 |
/* try to connect to the next address on the list */
|
246 |
if (s->current_addr) {
|
247 |
while (s->current_addr->ai_next != NULL && s->fd < 0) { |
248 |
s->current_addr = s->current_addr->ai_next; |
249 |
s->fd = inet_connect_addr(s->current_addr, &in_progress, s, NULL);
|
250 |
/* connect in progress */
|
251 |
if (in_progress) {
|
252 |
return;
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253 |
} |
254 |
} |
255 |
|
256 |
freeaddrinfo(s->addr_list); |
257 |
} |
258 |
|
259 |
if (s->callback) {
|
260 |
s->callback(s->fd, s->opaque); |
261 |
} |
262 |
g_free(s); |
263 |
} |
264 |
|
265 |
static int inet_connect_addr(struct addrinfo *addr, bool *in_progress, |
266 |
ConnectState *connect_state, Error **errp) |
267 |
{ |
268 |
int sock, rc;
|
269 |
|
270 |
*in_progress = false;
|
271 |
|
272 |
sock = qemu_socket(addr->ai_family, addr->ai_socktype, addr->ai_protocol); |
273 |
if (sock < 0) { |
274 |
error_set_errno(errp, errno, QERR_SOCKET_CREATE_FAILED); |
275 |
return -1; |
276 |
} |
277 |
qemu_setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
|
278 |
if (connect_state != NULL) { |
279 |
qemu_set_nonblock(sock); |
280 |
} |
281 |
/* connect to peer */
|
282 |
do {
|
283 |
rc = 0;
|
284 |
if (connect(sock, addr->ai_addr, addr->ai_addrlen) < 0) { |
285 |
rc = -socket_error(); |
286 |
} |
287 |
} while (rc == -EINTR);
|
288 |
|
289 |
if (connect_state != NULL && QEMU_SOCKET_RC_INPROGRESS(rc)) { |
290 |
connect_state->fd = sock; |
291 |
qemu_set_fd_handler2(sock, NULL, NULL, wait_for_connect, |
292 |
connect_state); |
293 |
*in_progress = true;
|
294 |
} else if (rc < 0) { |
295 |
error_set_errno(errp, errno, QERR_SOCKET_CONNECT_FAILED); |
296 |
closesocket(sock); |
297 |
return -1; |
298 |
} |
299 |
return sock;
|
300 |
} |
301 |
|
302 |
static struct addrinfo *inet_parse_connect_opts(QemuOpts *opts, Error **errp) |
303 |
{ |
304 |
struct addrinfo ai, *res;
|
305 |
int rc;
|
306 |
const char *addr; |
307 |
const char *port; |
308 |
|
309 |
memset(&ai, 0, sizeof(ai)); |
310 |
|
311 |
ai.ai_flags = AI_CANONNAME | AI_ADDRCONFIG; |
312 |
ai.ai_family = PF_UNSPEC; |
313 |
ai.ai_socktype = SOCK_STREAM; |
314 |
|
315 |
addr = qemu_opt_get(opts, "host");
|
316 |
port = qemu_opt_get(opts, "port");
|
317 |
if (addr == NULL || port == NULL) { |
318 |
error_setg(errp, "host and/or port not specified");
|
319 |
return NULL; |
320 |
} |
321 |
|
322 |
if (qemu_opt_get_bool(opts, "ipv4", 0)) { |
323 |
ai.ai_family = PF_INET; |
324 |
} |
325 |
if (qemu_opt_get_bool(opts, "ipv6", 0)) { |
326 |
ai.ai_family = PF_INET6; |
327 |
} |
328 |
|
329 |
/* lookup */
|
330 |
rc = getaddrinfo(addr, port, &ai, &res); |
331 |
if (rc != 0) { |
332 |
error_setg(errp, "address resolution failed for %s:%s: %s", addr, port,
|
333 |
gai_strerror(rc)); |
334 |
return NULL; |
335 |
} |
336 |
return res;
|
337 |
} |
338 |
|
339 |
/**
|
340 |
* Create a socket and connect it to an address.
|
341 |
*
|
342 |
* @opts: QEMU options, recognized parameters strings "host" and "port",
|
343 |
* bools "ipv4" and "ipv6".
|
344 |
* @errp: set on error
|
345 |
* @callback: callback function for non-blocking connect
|
346 |
* @opaque: opaque for callback function
|
347 |
*
|
348 |
* Returns: -1 on error, file descriptor on success.
|
349 |
*
|
350 |
* If @callback is non-null, the connect is non-blocking. If this
|
351 |
* function succeeds, callback will be called when the connection
|
352 |
* completes, with the file descriptor on success, or -1 on error.
|
353 |
*/
|
354 |
int inet_connect_opts(QemuOpts *opts, Error **errp,
|
355 |
NonBlockingConnectHandler *callback, void *opaque)
|
356 |
{ |
357 |
struct addrinfo *res, *e;
|
358 |
int sock = -1; |
359 |
bool in_progress;
|
360 |
ConnectState *connect_state = NULL;
|
361 |
|
362 |
res = inet_parse_connect_opts(opts, errp); |
363 |
if (!res) {
|
364 |
return -1; |
365 |
} |
366 |
|
367 |
if (callback != NULL) { |
368 |
connect_state = g_malloc0(sizeof(*connect_state));
|
369 |
connect_state->addr_list = res; |
370 |
connect_state->callback = callback; |
371 |
connect_state->opaque = opaque; |
372 |
} |
373 |
|
374 |
for (e = res; e != NULL; e = e->ai_next) { |
375 |
if (error_is_set(errp)) {
|
376 |
error_free(*errp); |
377 |
*errp = NULL;
|
378 |
} |
379 |
if (connect_state != NULL) { |
380 |
connect_state->current_addr = e; |
381 |
} |
382 |
sock = inet_connect_addr(e, &in_progress, connect_state, errp); |
383 |
if (in_progress) {
|
384 |
return sock;
|
385 |
} else if (sock >= 0) { |
386 |
/* non blocking socket immediate success, call callback */
|
387 |
if (callback != NULL) { |
388 |
callback(sock, opaque); |
389 |
} |
390 |
break;
|
391 |
} |
392 |
} |
393 |
g_free(connect_state); |
394 |
freeaddrinfo(res); |
395 |
return sock;
|
396 |
} |
397 |
|
398 |
int inet_dgram_opts(QemuOpts *opts, Error **errp)
|
399 |
{ |
400 |
struct addrinfo ai, *peer = NULL, *local = NULL; |
401 |
const char *addr; |
402 |
const char *port; |
403 |
int sock = -1, rc; |
404 |
|
405 |
/* lookup peer addr */
|
406 |
memset(&ai,0, sizeof(ai)); |
407 |
ai.ai_flags = AI_CANONNAME | AI_ADDRCONFIG; |
408 |
ai.ai_family = PF_UNSPEC; |
409 |
ai.ai_socktype = SOCK_DGRAM; |
410 |
|
411 |
addr = qemu_opt_get(opts, "host");
|
412 |
port = qemu_opt_get(opts, "port");
|
413 |
if (addr == NULL || strlen(addr) == 0) { |
414 |
addr = "localhost";
|
415 |
} |
416 |
if (port == NULL || strlen(port) == 0) { |
417 |
error_setg(errp, "remote port not specified");
|
418 |
return -1; |
419 |
} |
420 |
|
421 |
if (qemu_opt_get_bool(opts, "ipv4", 0)) |
422 |
ai.ai_family = PF_INET; |
423 |
if (qemu_opt_get_bool(opts, "ipv6", 0)) |
424 |
ai.ai_family = PF_INET6; |
425 |
|
426 |
if (0 != (rc = getaddrinfo(addr, port, &ai, &peer))) { |
427 |
error_setg(errp, "address resolution failed for %s:%s: %s", addr, port,
|
428 |
gai_strerror(rc)); |
429 |
return -1; |
430 |
} |
431 |
|
432 |
/* lookup local addr */
|
433 |
memset(&ai,0, sizeof(ai)); |
434 |
ai.ai_flags = AI_PASSIVE; |
435 |
ai.ai_family = peer->ai_family; |
436 |
ai.ai_socktype = SOCK_DGRAM; |
437 |
|
438 |
addr = qemu_opt_get(opts, "localaddr");
|
439 |
port = qemu_opt_get(opts, "localport");
|
440 |
if (addr == NULL || strlen(addr) == 0) { |
441 |
addr = NULL;
|
442 |
} |
443 |
if (!port || strlen(port) == 0) |
444 |
port = "0";
|
445 |
|
446 |
if (0 != (rc = getaddrinfo(addr, port, &ai, &local))) { |
447 |
error_setg(errp, "address resolution failed for %s:%s: %s", addr, port,
|
448 |
gai_strerror(rc)); |
449 |
goto err;
|
450 |
} |
451 |
|
452 |
/* create socket */
|
453 |
sock = qemu_socket(peer->ai_family, peer->ai_socktype, peer->ai_protocol); |
454 |
if (sock < 0) { |
455 |
error_set_errno(errp, errno, QERR_SOCKET_CREATE_FAILED); |
456 |
goto err;
|
457 |
} |
458 |
qemu_setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
|
459 |
|
460 |
/* bind socket */
|
461 |
if (bind(sock, local->ai_addr, local->ai_addrlen) < 0) { |
462 |
error_set_errno(errp, errno, QERR_SOCKET_BIND_FAILED); |
463 |
goto err;
|
464 |
} |
465 |
|
466 |
/* connect to peer */
|
467 |
if (connect(sock,peer->ai_addr,peer->ai_addrlen) < 0) { |
468 |
error_set_errno(errp, errno, QERR_SOCKET_CONNECT_FAILED); |
469 |
goto err;
|
470 |
} |
471 |
|
472 |
freeaddrinfo(local); |
473 |
freeaddrinfo(peer); |
474 |
return sock;
|
475 |
|
476 |
err:
|
477 |
if (-1 != sock) |
478 |
closesocket(sock); |
479 |
if (local)
|
480 |
freeaddrinfo(local); |
481 |
if (peer)
|
482 |
freeaddrinfo(peer); |
483 |
return -1; |
484 |
} |
485 |
|
486 |
/* compatibility wrapper */
|
487 |
InetSocketAddress *inet_parse(const char *str, Error **errp) |
488 |
{ |
489 |
InetSocketAddress *addr; |
490 |
const char *optstr, *h; |
491 |
char host[64]; |
492 |
char port[33]; |
493 |
int to;
|
494 |
int pos;
|
495 |
|
496 |
addr = g_new0(InetSocketAddress, 1);
|
497 |
|
498 |
/* parse address */
|
499 |
if (str[0] == ':') { |
500 |
/* no host given */
|
501 |
host[0] = '\0'; |
502 |
if (1 != sscanf(str, ":%32[^,]%n", port, &pos)) { |
503 |
error_setg(errp, "error parsing port in address '%s'", str);
|
504 |
goto fail;
|
505 |
} |
506 |
} else if (str[0] == '[') { |
507 |
/* IPv6 addr */
|
508 |
if (2 != sscanf(str, "[%64[^]]]:%32[^,]%n", host, port, &pos)) { |
509 |
error_setg(errp, "error parsing IPv6 address '%s'", str);
|
510 |
goto fail;
|
511 |
} |
512 |
addr->ipv6 = addr->has_ipv6 = true;
|
513 |
} else {
|
514 |
/* hostname or IPv4 addr */
|
515 |
if (2 != sscanf(str, "%64[^:]:%32[^,]%n", host, port, &pos)) { |
516 |
error_setg(errp, "error parsing address '%s'", str);
|
517 |
goto fail;
|
518 |
} |
519 |
if (host[strspn(host, "0123456789.")] == '\0') { |
520 |
addr->ipv4 = addr->has_ipv4 = true;
|
521 |
} |
522 |
} |
523 |
|
524 |
addr->host = g_strdup(host); |
525 |
addr->port = g_strdup(port); |
526 |
|
527 |
/* parse options */
|
528 |
optstr = str + pos; |
529 |
h = strstr(optstr, ",to=");
|
530 |
if (h) {
|
531 |
h += 4;
|
532 |
if (sscanf(h, "%d%n", &to, &pos) != 1 || |
533 |
(h[pos] != '\0' && h[pos] != ',')) { |
534 |
error_setg(errp, "error parsing to= argument");
|
535 |
goto fail;
|
536 |
} |
537 |
addr->has_to = true;
|
538 |
addr->to = to; |
539 |
} |
540 |
if (strstr(optstr, ",ipv4")) { |
541 |
addr->ipv4 = addr->has_ipv4 = true;
|
542 |
} |
543 |
if (strstr(optstr, ",ipv6")) { |
544 |
addr->ipv6 = addr->has_ipv6 = true;
|
545 |
} |
546 |
return addr;
|
547 |
|
548 |
fail:
|
549 |
qapi_free_InetSocketAddress(addr); |
550 |
return NULL; |
551 |
} |
552 |
|
553 |
static void inet_addr_to_opts(QemuOpts *opts, const InetSocketAddress *addr) |
554 |
{ |
555 |
bool ipv4 = addr->ipv4 || !addr->has_ipv4;
|
556 |
bool ipv6 = addr->ipv6 || !addr->has_ipv6;
|
557 |
|
558 |
if (!ipv4 || !ipv6) {
|
559 |
qemu_opt_set_bool(opts, "ipv4", ipv4);
|
560 |
qemu_opt_set_bool(opts, "ipv6", ipv6);
|
561 |
} |
562 |
if (addr->has_to) {
|
563 |
char to[20]; |
564 |
snprintf(to, sizeof(to), "%d", addr->to); |
565 |
qemu_opt_set(opts, "to", to);
|
566 |
} |
567 |
qemu_opt_set(opts, "host", addr->host);
|
568 |
qemu_opt_set(opts, "port", addr->port);
|
569 |
} |
570 |
|
571 |
int inet_listen(const char *str, char *ostr, int olen, |
572 |
int socktype, int port_offset, Error **errp) |
573 |
{ |
574 |
QemuOpts *opts; |
575 |
char *optstr;
|
576 |
int sock = -1; |
577 |
InetSocketAddress *addr; |
578 |
|
579 |
addr = inet_parse(str, errp); |
580 |
if (addr != NULL) { |
581 |
opts = qemu_opts_create_nofail(&socket_optslist); |
582 |
inet_addr_to_opts(opts, addr); |
583 |
qapi_free_InetSocketAddress(addr); |
584 |
sock = inet_listen_opts(opts, port_offset, errp); |
585 |
if (sock != -1 && ostr) { |
586 |
optstr = strchr(str, ',');
|
587 |
if (qemu_opt_get_bool(opts, "ipv6", 0)) { |
588 |
snprintf(ostr, olen, "[%s]:%s%s",
|
589 |
qemu_opt_get(opts, "host"),
|
590 |
qemu_opt_get(opts, "port"),
|
591 |
optstr ? optstr : "");
|
592 |
} else {
|
593 |
snprintf(ostr, olen, "%s:%s%s",
|
594 |
qemu_opt_get(opts, "host"),
|
595 |
qemu_opt_get(opts, "port"),
|
596 |
optstr ? optstr : "");
|
597 |
} |
598 |
} |
599 |
qemu_opts_del(opts); |
600 |
} |
601 |
return sock;
|
602 |
} |
603 |
|
604 |
/**
|
605 |
* Create a blocking socket and connect it to an address.
|
606 |
*
|
607 |
* @str: address string
|
608 |
* @errp: set in case of an error
|
609 |
*
|
610 |
* Returns -1 in case of error, file descriptor on success
|
611 |
**/
|
612 |
int inet_connect(const char *str, Error **errp) |
613 |
{ |
614 |
QemuOpts *opts; |
615 |
int sock = -1; |
616 |
InetSocketAddress *addr; |
617 |
|
618 |
addr = inet_parse(str, errp); |
619 |
if (addr != NULL) { |
620 |
opts = qemu_opts_create_nofail(&socket_optslist); |
621 |
inet_addr_to_opts(opts, addr); |
622 |
qapi_free_InetSocketAddress(addr); |
623 |
sock = inet_connect_opts(opts, errp, NULL, NULL); |
624 |
qemu_opts_del(opts); |
625 |
} |
626 |
return sock;
|
627 |
} |
628 |
|
629 |
/**
|
630 |
* Create a non-blocking socket and connect it to an address.
|
631 |
* Calls the callback function with fd in case of success or -1 in case of
|
632 |
* error.
|
633 |
*
|
634 |
* @str: address string
|
635 |
* @callback: callback function that is called when connect completes,
|
636 |
* cannot be NULL.
|
637 |
* @opaque: opaque for callback function
|
638 |
* @errp: set in case of an error
|
639 |
*
|
640 |
* Returns: -1 on immediate error, file descriptor on success.
|
641 |
**/
|
642 |
int inet_nonblocking_connect(const char *str, |
643 |
NonBlockingConnectHandler *callback, |
644 |
void *opaque, Error **errp)
|
645 |
{ |
646 |
QemuOpts *opts; |
647 |
int sock = -1; |
648 |
InetSocketAddress *addr; |
649 |
|
650 |
g_assert(callback != NULL);
|
651 |
|
652 |
addr = inet_parse(str, errp); |
653 |
if (addr != NULL) { |
654 |
opts = qemu_opts_create_nofail(&socket_optslist); |
655 |
inet_addr_to_opts(opts, addr); |
656 |
qapi_free_InetSocketAddress(addr); |
657 |
sock = inet_connect_opts(opts, errp, callback, opaque); |
658 |
qemu_opts_del(opts); |
659 |
} |
660 |
return sock;
|
661 |
} |
662 |
|
663 |
#ifndef _WIN32
|
664 |
|
665 |
int unix_listen_opts(QemuOpts *opts, Error **errp)
|
666 |
{ |
667 |
struct sockaddr_un un;
|
668 |
const char *path = qemu_opt_get(opts, "path"); |
669 |
int sock, fd;
|
670 |
|
671 |
sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
|
672 |
if (sock < 0) { |
673 |
error_set_errno(errp, errno, QERR_SOCKET_CREATE_FAILED); |
674 |
return -1; |
675 |
} |
676 |
|
677 |
memset(&un, 0, sizeof(un)); |
678 |
un.sun_family = AF_UNIX; |
679 |
if (path && strlen(path)) {
|
680 |
snprintf(un.sun_path, sizeof(un.sun_path), "%s", path); |
681 |
} else {
|
682 |
char *tmpdir = getenv("TMPDIR"); |
683 |
snprintf(un.sun_path, sizeof(un.sun_path), "%s/qemu-socket-XXXXXX", |
684 |
tmpdir ? tmpdir : "/tmp");
|
685 |
/*
|
686 |
* This dummy fd usage silences the mktemp() unsecure warning.
|
687 |
* Using mkstemp() doesn't make things more secure here
|
688 |
* though. bind() complains about existing files, so we have
|
689 |
* to unlink first and thus re-open the race window. The
|
690 |
* worst case possible is bind() failing, i.e. a DoS attack.
|
691 |
*/
|
692 |
fd = mkstemp(un.sun_path); close(fd); |
693 |
qemu_opt_set(opts, "path", un.sun_path);
|
694 |
} |
695 |
|
696 |
unlink(un.sun_path); |
697 |
if (bind(sock, (struct sockaddr*) &un, sizeof(un)) < 0) { |
698 |
error_set_errno(errp, errno, QERR_SOCKET_BIND_FAILED); |
699 |
goto err;
|
700 |
} |
701 |
if (listen(sock, 1) < 0) { |
702 |
error_set_errno(errp, errno, QERR_SOCKET_LISTEN_FAILED); |
703 |
goto err;
|
704 |
} |
705 |
|
706 |
return sock;
|
707 |
|
708 |
err:
|
709 |
closesocket(sock); |
710 |
return -1; |
711 |
} |
712 |
|
713 |
int unix_connect_opts(QemuOpts *opts, Error **errp,
|
714 |
NonBlockingConnectHandler *callback, void *opaque)
|
715 |
{ |
716 |
struct sockaddr_un un;
|
717 |
const char *path = qemu_opt_get(opts, "path"); |
718 |
ConnectState *connect_state = NULL;
|
719 |
int sock, rc;
|
720 |
|
721 |
if (NULL == path) { |
722 |
error_setg(errp, "unix connect: no path specified");
|
723 |
return -1; |
724 |
} |
725 |
|
726 |
sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
|
727 |
if (sock < 0) { |
728 |
error_set_errno(errp, errno, QERR_SOCKET_CREATE_FAILED); |
729 |
return -1; |
730 |
} |
731 |
if (callback != NULL) { |
732 |
connect_state = g_malloc0(sizeof(*connect_state));
|
733 |
connect_state->callback = callback; |
734 |
connect_state->opaque = opaque; |
735 |
qemu_set_nonblock(sock); |
736 |
} |
737 |
|
738 |
memset(&un, 0, sizeof(un)); |
739 |
un.sun_family = AF_UNIX; |
740 |
snprintf(un.sun_path, sizeof(un.sun_path), "%s", path); |
741 |
|
742 |
/* connect to peer */
|
743 |
do {
|
744 |
rc = 0;
|
745 |
if (connect(sock, (struct sockaddr *) &un, sizeof(un)) < 0) { |
746 |
rc = -socket_error(); |
747 |
} |
748 |
} while (rc == -EINTR);
|
749 |
|
750 |
if (connect_state != NULL && QEMU_SOCKET_RC_INPROGRESS(rc)) { |
751 |
connect_state->fd = sock; |
752 |
qemu_set_fd_handler2(sock, NULL, NULL, wait_for_connect, |
753 |
connect_state); |
754 |
return sock;
|
755 |
} else if (rc >= 0) { |
756 |
/* non blocking socket immediate success, call callback */
|
757 |
if (callback != NULL) { |
758 |
callback(sock, opaque); |
759 |
} |
760 |
} |
761 |
|
762 |
if (rc < 0) { |
763 |
error_set_errno(errp, -rc, QERR_SOCKET_CONNECT_FAILED); |
764 |
close(sock); |
765 |
sock = -1;
|
766 |
} |
767 |
|
768 |
g_free(connect_state); |
769 |
return sock;
|
770 |
} |
771 |
|
772 |
#else
|
773 |
|
774 |
int unix_listen_opts(QemuOpts *opts, Error **errp)
|
775 |
{ |
776 |
error_setg(errp, "unix sockets are not available on windows");
|
777 |
errno = ENOTSUP; |
778 |
return -1; |
779 |
} |
780 |
|
781 |
int unix_connect_opts(QemuOpts *opts, Error **errp,
|
782 |
NonBlockingConnectHandler *callback, void *opaque)
|
783 |
{ |
784 |
error_setg(errp, "unix sockets are not available on windows");
|
785 |
errno = ENOTSUP; |
786 |
return -1; |
787 |
} |
788 |
#endif
|
789 |
|
790 |
/* compatibility wrapper */
|
791 |
int unix_listen(const char *str, char *ostr, int olen, Error **errp) |
792 |
{ |
793 |
QemuOpts *opts; |
794 |
char *path, *optstr;
|
795 |
int sock, len;
|
796 |
|
797 |
opts = qemu_opts_create_nofail(&socket_optslist); |
798 |
|
799 |
optstr = strchr(str, ',');
|
800 |
if (optstr) {
|
801 |
len = optstr - str; |
802 |
if (len) {
|
803 |
path = g_malloc(len+1);
|
804 |
snprintf(path, len+1, "%.*s", len, str); |
805 |
qemu_opt_set(opts, "path", path);
|
806 |
g_free(path); |
807 |
} |
808 |
} else {
|
809 |
qemu_opt_set(opts, "path", str);
|
810 |
} |
811 |
|
812 |
sock = unix_listen_opts(opts, errp); |
813 |
|
814 |
if (sock != -1 && ostr) |
815 |
snprintf(ostr, olen, "%s%s", qemu_opt_get(opts, "path"), optstr ? optstr : ""); |
816 |
qemu_opts_del(opts); |
817 |
return sock;
|
818 |
} |
819 |
|
820 |
int unix_connect(const char *path, Error **errp) |
821 |
{ |
822 |
QemuOpts *opts; |
823 |
int sock;
|
824 |
|
825 |
opts = qemu_opts_create_nofail(&socket_optslist); |
826 |
qemu_opt_set(opts, "path", path);
|
827 |
sock = unix_connect_opts(opts, errp, NULL, NULL); |
828 |
qemu_opts_del(opts); |
829 |
return sock;
|
830 |
} |
831 |
|
832 |
|
833 |
int unix_nonblocking_connect(const char *path, |
834 |
NonBlockingConnectHandler *callback, |
835 |
void *opaque, Error **errp)
|
836 |
{ |
837 |
QemuOpts *opts; |
838 |
int sock = -1; |
839 |
|
840 |
g_assert(callback != NULL);
|
841 |
|
842 |
opts = qemu_opts_create_nofail(&socket_optslist); |
843 |
qemu_opt_set(opts, "path", path);
|
844 |
sock = unix_connect_opts(opts, errp, callback, opaque); |
845 |
qemu_opts_del(opts); |
846 |
return sock;
|
847 |
} |
848 |
|
849 |
SocketAddress *socket_parse(const char *str, Error **errp) |
850 |
{ |
851 |
SocketAddress *addr; |
852 |
|
853 |
addr = g_new0(SocketAddress, 1);
|
854 |
if (strstart(str, "unix:", NULL)) { |
855 |
if (str[5] == '\0') { |
856 |
error_setg(errp, "invalid Unix socket address");
|
857 |
goto fail;
|
858 |
} else {
|
859 |
addr->kind = SOCKET_ADDRESS_KIND_UNIX; |
860 |
addr->q_unix = g_new(UnixSocketAddress, 1);
|
861 |
addr->q_unix->path = g_strdup(str + 5);
|
862 |
} |
863 |
} else if (strstart(str, "fd:", NULL)) { |
864 |
if (str[3] == '\0') { |
865 |
error_setg(errp, "invalid file descriptor address");
|
866 |
goto fail;
|
867 |
} else {
|
868 |
addr->kind = SOCKET_ADDRESS_KIND_FD; |
869 |
addr->fd = g_new(String, 1);
|
870 |
addr->fd->str = g_strdup(str + 3);
|
871 |
} |
872 |
} else {
|
873 |
addr->kind = SOCKET_ADDRESS_KIND_INET; |
874 |
addr->inet = inet_parse(str, errp); |
875 |
if (addr->inet == NULL) { |
876 |
goto fail;
|
877 |
} |
878 |
} |
879 |
return addr;
|
880 |
|
881 |
fail:
|
882 |
qapi_free_SocketAddress(addr); |
883 |
return NULL; |
884 |
} |
885 |
|
886 |
int socket_connect(SocketAddress *addr, Error **errp,
|
887 |
NonBlockingConnectHandler *callback, void *opaque)
|
888 |
{ |
889 |
QemuOpts *opts; |
890 |
int fd;
|
891 |
|
892 |
opts = qemu_opts_create_nofail(&socket_optslist); |
893 |
switch (addr->kind) {
|
894 |
case SOCKET_ADDRESS_KIND_INET:
|
895 |
inet_addr_to_opts(opts, addr->inet); |
896 |
fd = inet_connect_opts(opts, errp, callback, opaque); |
897 |
break;
|
898 |
|
899 |
case SOCKET_ADDRESS_KIND_UNIX:
|
900 |
qemu_opt_set(opts, "path", addr->q_unix->path);
|
901 |
fd = unix_connect_opts(opts, errp, callback, opaque); |
902 |
break;
|
903 |
|
904 |
case SOCKET_ADDRESS_KIND_FD:
|
905 |
fd = monitor_get_fd(cur_mon, addr->fd->str, errp); |
906 |
if (fd >= 0 && callback) { |
907 |
qemu_set_nonblock(fd); |
908 |
callback(fd, opaque); |
909 |
} |
910 |
break;
|
911 |
|
912 |
default:
|
913 |
abort(); |
914 |
} |
915 |
qemu_opts_del(opts); |
916 |
return fd;
|
917 |
} |
918 |
|
919 |
int socket_listen(SocketAddress *addr, Error **errp)
|
920 |
{ |
921 |
QemuOpts *opts; |
922 |
int fd;
|
923 |
|
924 |
opts = qemu_opts_create_nofail(&socket_optslist); |
925 |
switch (addr->kind) {
|
926 |
case SOCKET_ADDRESS_KIND_INET:
|
927 |
inet_addr_to_opts(opts, addr->inet); |
928 |
fd = inet_listen_opts(opts, 0, errp);
|
929 |
break;
|
930 |
|
931 |
case SOCKET_ADDRESS_KIND_UNIX:
|
932 |
qemu_opt_set(opts, "path", addr->q_unix->path);
|
933 |
fd = unix_listen_opts(opts, errp); |
934 |
break;
|
935 |
|
936 |
case SOCKET_ADDRESS_KIND_FD:
|
937 |
fd = monitor_get_fd(cur_mon, addr->fd->str, errp); |
938 |
break;
|
939 |
|
940 |
default:
|
941 |
abort(); |
942 |
} |
943 |
qemu_opts_del(opts); |
944 |
return fd;
|
945 |
} |
946 |
|
947 |
int socket_dgram(SocketAddress *remote, SocketAddress *local, Error **errp)
|
948 |
{ |
949 |
QemuOpts *opts; |
950 |
int fd;
|
951 |
|
952 |
opts = qemu_opts_create_nofail(&socket_optslist); |
953 |
switch (remote->kind) {
|
954 |
case SOCKET_ADDRESS_KIND_INET:
|
955 |
qemu_opt_set(opts, "host", remote->inet->host);
|
956 |
qemu_opt_set(opts, "port", remote->inet->port);
|
957 |
if (local) {
|
958 |
qemu_opt_set(opts, "localaddr", local->inet->host);
|
959 |
qemu_opt_set(opts, "localport", local->inet->port);
|
960 |
} |
961 |
fd = inet_dgram_opts(opts, errp); |
962 |
break;
|
963 |
|
964 |
default:
|
965 |
error_setg(errp, "socket type unsupported for datagram");
|
966 |
fd = -1;
|
967 |
} |
968 |
qemu_opts_del(opts); |
969 |
return fd;
|
970 |
} |