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/*
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* QEMU System Emulator
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "net/socket.h" |
25 |
|
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#include "config-host.h" |
27 |
|
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#include "net.h" |
29 |
#include "qemu-char.h" |
30 |
#include "qemu-common.h" |
31 |
#include "qemu-error.h" |
32 |
#include "qemu-option.h" |
33 |
#include "qemu_socket.h" |
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|
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typedef struct NetSocketState { |
36 |
VLANClientState nc; |
37 |
int fd;
|
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int state; /* 0 = getting length, 1 = getting data */ |
39 |
unsigned int index; |
40 |
unsigned int packet_len; |
41 |
uint8_t buf[4096];
|
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struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */ |
43 |
} NetSocketState; |
44 |
|
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typedef struct NetSocketListenState { |
46 |
VLANState *vlan; |
47 |
char *model;
|
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char *name;
|
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int fd;
|
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} NetSocketListenState; |
51 |
|
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/* XXX: we consider we can send the whole packet without blocking */
|
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static ssize_t net_socket_receive(VLANClientState *nc, const uint8_t *buf, size_t size) |
54 |
{ |
55 |
NetSocketState *s = DO_UPCAST(NetSocketState, nc, nc); |
56 |
uint32_t len; |
57 |
len = htonl(size); |
58 |
|
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send_all(s->fd, (const uint8_t *)&len, sizeof(len)); |
60 |
return send_all(s->fd, buf, size);
|
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} |
62 |
|
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static ssize_t net_socket_receive_dgram(VLANClientState *nc, const uint8_t *buf, size_t size) |
64 |
{ |
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NetSocketState *s = DO_UPCAST(NetSocketState, nc, nc); |
66 |
|
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return sendto(s->fd, (const void *)buf, size, 0, |
68 |
(struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst)); |
69 |
} |
70 |
|
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static void net_socket_send(void *opaque) |
72 |
{ |
73 |
NetSocketState *s = opaque; |
74 |
int size, err;
|
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unsigned l;
|
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uint8_t buf1[4096];
|
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const uint8_t *buf;
|
78 |
|
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size = qemu_recv(s->fd, buf1, sizeof(buf1), 0); |
80 |
if (size < 0) { |
81 |
err = socket_error(); |
82 |
if (err != EWOULDBLOCK)
|
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goto eoc;
|
84 |
} else if (size == 0) { |
85 |
/* end of connection */
|
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eoc:
|
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qemu_set_fd_handler(s->fd, NULL, NULL, NULL); |
88 |
closesocket(s->fd); |
89 |
return;
|
90 |
} |
91 |
buf = buf1; |
92 |
while (size > 0) { |
93 |
/* reassemble a packet from the network */
|
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switch(s->state) {
|
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case 0: |
96 |
l = 4 - s->index;
|
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if (l > size)
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l = size; |
99 |
memcpy(s->buf + s->index, buf, l); |
100 |
buf += l; |
101 |
size -= l; |
102 |
s->index += l; |
103 |
if (s->index == 4) { |
104 |
/* got length */
|
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s->packet_len = ntohl(*(uint32_t *)s->buf); |
106 |
s->index = 0;
|
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s->state = 1;
|
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} |
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break;
|
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case 1: |
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l = s->packet_len - s->index; |
112 |
if (l > size)
|
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l = size; |
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if (s->index + l <= sizeof(s->buf)) { |
115 |
memcpy(s->buf + s->index, buf, l); |
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} else {
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fprintf(stderr, "serious error: oversized packet received,"
|
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"connection terminated.\n");
|
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s->state = 0;
|
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goto eoc;
|
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} |
122 |
|
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s->index += l; |
124 |
buf += l; |
125 |
size -= l; |
126 |
if (s->index >= s->packet_len) {
|
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qemu_send_packet(&s->nc, s->buf, s->packet_len); |
128 |
s->index = 0;
|
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s->state = 0;
|
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} |
131 |
break;
|
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} |
133 |
} |
134 |
} |
135 |
|
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static void net_socket_send_dgram(void *opaque) |
137 |
{ |
138 |
NetSocketState *s = opaque; |
139 |
int size;
|
140 |
|
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size = qemu_recv(s->fd, s->buf, sizeof(s->buf), 0); |
142 |
if (size < 0) |
143 |
return;
|
144 |
if (size == 0) { |
145 |
/* end of connection */
|
146 |
qemu_set_fd_handler(s->fd, NULL, NULL, NULL); |
147 |
return;
|
148 |
} |
149 |
qemu_send_packet(&s->nc, s->buf, size); |
150 |
} |
151 |
|
152 |
static int net_socket_mcast_create(struct sockaddr_in *mcastaddr, struct in_addr *localaddr) |
153 |
{ |
154 |
struct ip_mreq imr;
|
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int fd;
|
156 |
int val, ret;
|
157 |
#ifdef __OpenBSD__
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unsigned char loop; |
159 |
#else
|
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int loop;
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161 |
#endif
|
162 |
|
163 |
if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
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fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n",
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inet_ntoa(mcastaddr->sin_addr), |
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(int)ntohl(mcastaddr->sin_addr.s_addr));
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return -1; |
168 |
|
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} |
170 |
fd = qemu_socket(PF_INET, SOCK_DGRAM, 0);
|
171 |
if (fd < 0) { |
172 |
perror("socket(PF_INET, SOCK_DGRAM)");
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return -1; |
174 |
} |
175 |
|
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val = 1;
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ret=setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, |
178 |
(const char *)&val, sizeof(val)); |
179 |
if (ret < 0) { |
180 |
perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
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goto fail;
|
182 |
} |
183 |
|
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ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr)); |
185 |
if (ret < 0) { |
186 |
perror("bind");
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goto fail;
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188 |
} |
189 |
|
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/* Add host to multicast group */
|
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imr.imr_multiaddr = mcastaddr->sin_addr; |
192 |
if (localaddr) {
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imr.imr_interface = *localaddr; |
194 |
} else {
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imr.imr_interface.s_addr = htonl(INADDR_ANY); |
196 |
} |
197 |
|
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ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, |
199 |
(const char *)&imr, sizeof(struct ip_mreq)); |
200 |
if (ret < 0) { |
201 |
perror("setsockopt(IP_ADD_MEMBERSHIP)");
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goto fail;
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203 |
} |
204 |
|
205 |
/* Force mcast msgs to loopback (eg. several QEMUs in same host */
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loop = 1;
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ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP, |
208 |
(const char *)&loop, sizeof(loop)); |
209 |
if (ret < 0) { |
210 |
perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
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goto fail;
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212 |
} |
213 |
|
214 |
/* If a bind address is given, only send packets from that address */
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215 |
if (localaddr != NULL) { |
216 |
ret = setsockopt(fd, IPPROTO_IP, IP_MULTICAST_IF, |
217 |
(const char *)localaddr, sizeof(*localaddr)); |
218 |
if (ret < 0) { |
219 |
perror("setsockopt(IP_MULTICAST_IF)");
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220 |
goto fail;
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221 |
} |
222 |
} |
223 |
|
224 |
socket_set_nonblock(fd); |
225 |
return fd;
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226 |
fail:
|
227 |
if (fd >= 0) |
228 |
closesocket(fd); |
229 |
return -1; |
230 |
} |
231 |
|
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static void net_socket_cleanup(VLANClientState *nc) |
233 |
{ |
234 |
NetSocketState *s = DO_UPCAST(NetSocketState, nc, nc); |
235 |
qemu_set_fd_handler(s->fd, NULL, NULL, NULL); |
236 |
close(s->fd); |
237 |
} |
238 |
|
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static NetClientInfo net_dgram_socket_info = {
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.type = NET_CLIENT_TYPE_SOCKET, |
241 |
.size = sizeof(NetSocketState),
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.receive = net_socket_receive_dgram, |
243 |
.cleanup = net_socket_cleanup, |
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}; |
245 |
|
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static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
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const char *model, |
248 |
const char *name, |
249 |
int fd, int is_connected) |
250 |
{ |
251 |
struct sockaddr_in saddr;
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252 |
int newfd;
|
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socklen_t saddr_len; |
254 |
VLANClientState *nc; |
255 |
NetSocketState *s; |
256 |
|
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/* fd passed: multicast: "learn" dgram_dst address from bound address and save it
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* Because this may be "shared" socket from a "master" process, datagrams would be recv()
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* by ONLY ONE process: we must "clone" this dgram socket --jjo
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*/
|
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|
262 |
if (is_connected) {
|
263 |
if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) { |
264 |
/* must be bound */
|
265 |
if (saddr.sin_addr.s_addr==0) { |
266 |
fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, cannot setup multicast dst addr\n",
|
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fd); |
268 |
return NULL; |
269 |
} |
270 |
/* clone dgram socket */
|
271 |
newfd = net_socket_mcast_create(&saddr, NULL);
|
272 |
if (newfd < 0) { |
273 |
/* error already reported by net_socket_mcast_create() */
|
274 |
close(fd); |
275 |
return NULL; |
276 |
} |
277 |
/* clone newfd to fd, close newfd */
|
278 |
dup2(newfd, fd); |
279 |
close(newfd); |
280 |
|
281 |
} else {
|
282 |
fprintf(stderr, "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
|
283 |
fd, strerror(errno)); |
284 |
return NULL; |
285 |
} |
286 |
} |
287 |
|
288 |
nc = qemu_new_net_client(&net_dgram_socket_info, vlan, NULL, model, name);
|
289 |
|
290 |
snprintf(nc->info_str, sizeof(nc->info_str),
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291 |
"socket: fd=%d (%s mcast=%s:%d)",
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292 |
fd, is_connected ? "cloned" : "", |
293 |
inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port)); |
294 |
|
295 |
s = DO_UPCAST(NetSocketState, nc, nc); |
296 |
|
297 |
s->fd = fd; |
298 |
|
299 |
qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s);
|
300 |
|
301 |
/* mcast: save bound address as dst */
|
302 |
if (is_connected) s->dgram_dst=saddr;
|
303 |
|
304 |
return s;
|
305 |
} |
306 |
|
307 |
static void net_socket_connect(void *opaque) |
308 |
{ |
309 |
NetSocketState *s = opaque; |
310 |
qemu_set_fd_handler(s->fd, net_socket_send, NULL, s);
|
311 |
} |
312 |
|
313 |
static NetClientInfo net_socket_info = {
|
314 |
.type = NET_CLIENT_TYPE_SOCKET, |
315 |
.size = sizeof(NetSocketState),
|
316 |
.receive = net_socket_receive, |
317 |
.cleanup = net_socket_cleanup, |
318 |
}; |
319 |
|
320 |
static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
|
321 |
const char *model, |
322 |
const char *name, |
323 |
int fd, int is_connected) |
324 |
{ |
325 |
VLANClientState *nc; |
326 |
NetSocketState *s; |
327 |
|
328 |
nc = qemu_new_net_client(&net_socket_info, vlan, NULL, model, name);
|
329 |
|
330 |
snprintf(nc->info_str, sizeof(nc->info_str), "socket: fd=%d", fd); |
331 |
|
332 |
s = DO_UPCAST(NetSocketState, nc, nc); |
333 |
|
334 |
s->fd = fd; |
335 |
|
336 |
if (is_connected) {
|
337 |
net_socket_connect(s); |
338 |
} else {
|
339 |
qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
|
340 |
} |
341 |
return s;
|
342 |
} |
343 |
|
344 |
static NetSocketState *net_socket_fd_init(VLANState *vlan,
|
345 |
const char *model, const char *name, |
346 |
int fd, int is_connected) |
347 |
{ |
348 |
int so_type = -1, optlen=sizeof(so_type); |
349 |
|
350 |
if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type, |
351 |
(socklen_t *)&optlen)< 0) {
|
352 |
fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n", fd);
|
353 |
return NULL; |
354 |
} |
355 |
switch(so_type) {
|
356 |
case SOCK_DGRAM:
|
357 |
return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected);
|
358 |
case SOCK_STREAM:
|
359 |
return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
|
360 |
default:
|
361 |
/* who knows ... this could be a eg. a pty, do warn and continue as stream */
|
362 |
fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
|
363 |
return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
|
364 |
} |
365 |
return NULL; |
366 |
} |
367 |
|
368 |
static void net_socket_accept(void *opaque) |
369 |
{ |
370 |
NetSocketListenState *s = opaque; |
371 |
NetSocketState *s1; |
372 |
struct sockaddr_in saddr;
|
373 |
socklen_t len; |
374 |
int fd;
|
375 |
|
376 |
for(;;) {
|
377 |
len = sizeof(saddr);
|
378 |
fd = qemu_accept(s->fd, (struct sockaddr *)&saddr, &len);
|
379 |
if (fd < 0 && errno != EINTR) { |
380 |
return;
|
381 |
} else if (fd >= 0) { |
382 |
break;
|
383 |
} |
384 |
} |
385 |
s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1);
|
386 |
if (!s1) {
|
387 |
closesocket(fd); |
388 |
} else {
|
389 |
snprintf(s1->nc.info_str, sizeof(s1->nc.info_str),
|
390 |
"socket: connection from %s:%d",
|
391 |
inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port)); |
392 |
} |
393 |
} |
394 |
|
395 |
static int net_socket_listen_init(VLANState *vlan, |
396 |
const char *model, |
397 |
const char *name, |
398 |
const char *host_str) |
399 |
{ |
400 |
NetSocketListenState *s; |
401 |
int fd, val, ret;
|
402 |
struct sockaddr_in saddr;
|
403 |
|
404 |
if (parse_host_port(&saddr, host_str) < 0) |
405 |
return -1; |
406 |
|
407 |
s = g_malloc0(sizeof(NetSocketListenState));
|
408 |
|
409 |
fd = qemu_socket(PF_INET, SOCK_STREAM, 0);
|
410 |
if (fd < 0) { |
411 |
perror("socket");
|
412 |
return -1; |
413 |
} |
414 |
socket_set_nonblock(fd); |
415 |
|
416 |
/* allow fast reuse */
|
417 |
val = 1;
|
418 |
setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val)); |
419 |
|
420 |
ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr)); |
421 |
if (ret < 0) { |
422 |
perror("bind");
|
423 |
return -1; |
424 |
} |
425 |
ret = listen(fd, 0);
|
426 |
if (ret < 0) { |
427 |
perror("listen");
|
428 |
return -1; |
429 |
} |
430 |
s->vlan = vlan; |
431 |
s->model = g_strdup(model); |
432 |
s->name = name ? g_strdup(name) : NULL;
|
433 |
s->fd = fd; |
434 |
qemu_set_fd_handler(fd, net_socket_accept, NULL, s);
|
435 |
return 0; |
436 |
} |
437 |
|
438 |
static int net_socket_connect_init(VLANState *vlan, |
439 |
const char *model, |
440 |
const char *name, |
441 |
const char *host_str) |
442 |
{ |
443 |
NetSocketState *s; |
444 |
int fd, connected, ret, err;
|
445 |
struct sockaddr_in saddr;
|
446 |
|
447 |
if (parse_host_port(&saddr, host_str) < 0) |
448 |
return -1; |
449 |
|
450 |
fd = qemu_socket(PF_INET, SOCK_STREAM, 0);
|
451 |
if (fd < 0) { |
452 |
perror("socket");
|
453 |
return -1; |
454 |
} |
455 |
socket_set_nonblock(fd); |
456 |
|
457 |
connected = 0;
|
458 |
for(;;) {
|
459 |
ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr)); |
460 |
if (ret < 0) { |
461 |
err = socket_error(); |
462 |
if (err == EINTR || err == EWOULDBLOCK) {
|
463 |
} else if (err == EINPROGRESS) { |
464 |
break;
|
465 |
#ifdef _WIN32
|
466 |
} else if (err == WSAEALREADY || err == WSAEINVAL) { |
467 |
break;
|
468 |
#endif
|
469 |
} else {
|
470 |
perror("connect");
|
471 |
closesocket(fd); |
472 |
return -1; |
473 |
} |
474 |
} else {
|
475 |
connected = 1;
|
476 |
break;
|
477 |
} |
478 |
} |
479 |
s = net_socket_fd_init(vlan, model, name, fd, connected); |
480 |
if (!s)
|
481 |
return -1; |
482 |
snprintf(s->nc.info_str, sizeof(s->nc.info_str),
|
483 |
"socket: connect to %s:%d",
|
484 |
inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port)); |
485 |
return 0; |
486 |
} |
487 |
|
488 |
static int net_socket_mcast_init(VLANState *vlan, |
489 |
const char *model, |
490 |
const char *name, |
491 |
const char *host_str, |
492 |
const char *localaddr_str) |
493 |
{ |
494 |
NetSocketState *s; |
495 |
int fd;
|
496 |
struct sockaddr_in saddr;
|
497 |
struct in_addr localaddr, *param_localaddr;
|
498 |
|
499 |
if (parse_host_port(&saddr, host_str) < 0) |
500 |
return -1; |
501 |
|
502 |
if (localaddr_str != NULL) { |
503 |
if (inet_aton(localaddr_str, &localaddr) == 0) |
504 |
return -1; |
505 |
param_localaddr = &localaddr; |
506 |
} else {
|
507 |
param_localaddr = NULL;
|
508 |
} |
509 |
|
510 |
fd = net_socket_mcast_create(&saddr, param_localaddr); |
511 |
if (fd < 0) |
512 |
return -1; |
513 |
|
514 |
s = net_socket_fd_init(vlan, model, name, fd, 0);
|
515 |
if (!s)
|
516 |
return -1; |
517 |
|
518 |
s->dgram_dst = saddr; |
519 |
|
520 |
snprintf(s->nc.info_str, sizeof(s->nc.info_str),
|
521 |
"socket: mcast=%s:%d",
|
522 |
inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port)); |
523 |
return 0; |
524 |
|
525 |
} |
526 |
|
527 |
int net_init_socket(QemuOpts *opts,
|
528 |
Monitor *mon, |
529 |
const char *name, |
530 |
VLANState *vlan) |
531 |
{ |
532 |
if (qemu_opt_get(opts, "fd")) { |
533 |
int fd;
|
534 |
|
535 |
if (qemu_opt_get(opts, "listen") || |
536 |
qemu_opt_get(opts, "connect") ||
|
537 |
qemu_opt_get(opts, "mcast") ||
|
538 |
qemu_opt_get(opts, "localaddr")) {
|
539 |
error_report("listen=, connect=, mcast= and localaddr= is invalid with fd=");
|
540 |
return -1; |
541 |
} |
542 |
|
543 |
fd = net_handle_fd_param(mon, qemu_opt_get(opts, "fd"));
|
544 |
if (fd == -1) { |
545 |
return -1; |
546 |
} |
547 |
|
548 |
if (!net_socket_fd_init(vlan, "socket", name, fd, 1)) { |
549 |
close(fd); |
550 |
return -1; |
551 |
} |
552 |
} else if (qemu_opt_get(opts, "listen")) { |
553 |
const char *listen; |
554 |
|
555 |
if (qemu_opt_get(opts, "fd") || |
556 |
qemu_opt_get(opts, "connect") ||
|
557 |
qemu_opt_get(opts, "mcast") ||
|
558 |
qemu_opt_get(opts, "localaddr")) {
|
559 |
error_report("fd=, connect=, mcast= and localaddr= is invalid with listen=");
|
560 |
return -1; |
561 |
} |
562 |
|
563 |
listen = qemu_opt_get(opts, "listen");
|
564 |
|
565 |
if (net_socket_listen_init(vlan, "socket", name, listen) == -1) { |
566 |
return -1; |
567 |
} |
568 |
} else if (qemu_opt_get(opts, "connect")) { |
569 |
const char *connect; |
570 |
|
571 |
if (qemu_opt_get(opts, "fd") || |
572 |
qemu_opt_get(opts, "listen") ||
|
573 |
qemu_opt_get(opts, "mcast") ||
|
574 |
qemu_opt_get(opts, "localaddr")) {
|
575 |
error_report("fd=, listen=, mcast= and localaddr= is invalid with connect=");
|
576 |
return -1; |
577 |
} |
578 |
|
579 |
connect = qemu_opt_get(opts, "connect");
|
580 |
|
581 |
if (net_socket_connect_init(vlan, "socket", name, connect) == -1) { |
582 |
return -1; |
583 |
} |
584 |
} else if (qemu_opt_get(opts, "mcast")) { |
585 |
const char *mcast, *localaddr; |
586 |
|
587 |
if (qemu_opt_get(opts, "fd") || |
588 |
qemu_opt_get(opts, "connect") ||
|
589 |
qemu_opt_get(opts, "listen")) {
|
590 |
error_report("fd=, connect= and listen= is invalid with mcast=");
|
591 |
return -1; |
592 |
} |
593 |
|
594 |
mcast = qemu_opt_get(opts, "mcast");
|
595 |
localaddr = qemu_opt_get(opts, "localaddr");
|
596 |
|
597 |
if (net_socket_mcast_init(vlan, "socket", name, mcast, localaddr) == -1) { |
598 |
return -1; |
599 |
} |
600 |
} else {
|
601 |
error_report("-socket requires fd=, listen=, connect= or mcast=");
|
602 |
return -1; |
603 |
} |
604 |
|
605 |
return 0; |
606 |
} |