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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" |
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#include "monitor.h" |
30 |
#include "qemu-char.h" |
31 |
#include "qemu-common.h" |
32 |
#include "qemu-error.h" |
33 |
#include "qemu-option.h" |
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#include "qemu_socket.h" |
35 |
#include "iov.h" |
36 |
|
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typedef struct NetSocketState { |
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NetClientState nc; |
39 |
int listen_fd;
|
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int fd;
|
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int state; /* 0 = getting length, 1 = getting data */ |
42 |
unsigned int index; |
43 |
unsigned int packet_len; |
44 |
unsigned int send_index; /* number of bytes sent (only SOCK_STREAM) */ |
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uint8_t buf[4096];
|
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struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */ |
47 |
IOHandler *send_fn; /* differs between SOCK_STREAM/SOCK_DGRAM */
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bool read_poll; /* waiting to receive data? */ |
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bool write_poll; /* waiting to transmit data? */ |
50 |
} NetSocketState; |
51 |
|
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static void net_socket_accept(void *opaque); |
53 |
static void net_socket_writable(void *opaque); |
54 |
|
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/* Only read packets from socket when peer can receive them */
|
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static int net_socket_can_send(void *opaque) |
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{ |
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NetSocketState *s = opaque; |
59 |
|
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return qemu_can_send_packet(&s->nc);
|
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} |
62 |
|
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static void net_socket_update_fd_handler(NetSocketState *s) |
64 |
{ |
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qemu_set_fd_handler2(s->fd, |
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s->read_poll ? net_socket_can_send : NULL,
|
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s->read_poll ? s->send_fn : NULL,
|
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s->write_poll ? net_socket_writable : NULL,
|
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s); |
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} |
71 |
|
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static void net_socket_read_poll(NetSocketState *s, bool enable) |
73 |
{ |
74 |
s->read_poll = enable; |
75 |
net_socket_update_fd_handler(s); |
76 |
} |
77 |
|
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static void net_socket_write_poll(NetSocketState *s, bool enable) |
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{ |
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s->write_poll = enable; |
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net_socket_update_fd_handler(s); |
82 |
} |
83 |
|
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static void net_socket_writable(void *opaque) |
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{ |
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NetSocketState *s = opaque; |
87 |
|
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net_socket_write_poll(s, false);
|
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|
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qemu_flush_queued_packets(&s->nc); |
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} |
92 |
|
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static ssize_t net_socket_receive(NetClientState *nc, const uint8_t *buf, size_t size) |
94 |
{ |
95 |
NetSocketState *s = DO_UPCAST(NetSocketState, nc, nc); |
96 |
uint32_t len = htonl(size); |
97 |
struct iovec iov[] = {
|
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{ |
99 |
.iov_base = &len, |
100 |
.iov_len = sizeof(len),
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}, { |
102 |
.iov_base = (void *)buf,
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.iov_len = size, |
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}, |
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}; |
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size_t remaining; |
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ssize_t ret; |
108 |
|
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remaining = iov_size(iov, 2) - s->send_index;
|
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ret = iov_send(s->fd, iov, 2, s->send_index, remaining);
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|
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if (ret == -1 && errno == EAGAIN) { |
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ret = 0; /* handled further down */ |
114 |
} |
115 |
if (ret == -1) { |
116 |
s->send_index = 0;
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return -errno;
|
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} |
119 |
if (ret < (ssize_t)remaining) {
|
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s->send_index += ret; |
121 |
net_socket_write_poll(s, true);
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return 0; |
123 |
} |
124 |
s->send_index = 0;
|
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return size;
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} |
127 |
|
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static ssize_t net_socket_receive_dgram(NetClientState *nc, const uint8_t *buf, size_t size) |
129 |
{ |
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NetSocketState *s = DO_UPCAST(NetSocketState, nc, nc); |
131 |
ssize_t ret; |
132 |
|
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do {
|
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ret = sendto(s->fd, buf, size, 0,
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(struct sockaddr *)&s->dgram_dst,
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sizeof(s->dgram_dst));
|
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} while (ret == -1 && errno == EINTR); |
138 |
|
139 |
if (ret == -1 && errno == EAGAIN) { |
140 |
net_socket_write_poll(s, true);
|
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return 0; |
142 |
} |
143 |
return ret;
|
144 |
} |
145 |
|
146 |
static void net_socket_send(void *opaque) |
147 |
{ |
148 |
NetSocketState *s = opaque; |
149 |
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;
|
153 |
|
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size = qemu_recv(s->fd, buf1, sizeof(buf1), 0); |
155 |
if (size < 0) { |
156 |
err = socket_error(); |
157 |
if (err != EWOULDBLOCK)
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goto eoc;
|
159 |
} else if (size == 0) { |
160 |
/* end of connection */
|
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eoc:
|
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net_socket_read_poll(s, false);
|
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net_socket_write_poll(s, false);
|
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if (s->listen_fd != -1) { |
165 |
qemu_set_fd_handler(s->listen_fd, net_socket_accept, NULL, s);
|
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} |
167 |
closesocket(s->fd); |
168 |
|
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s->fd = -1;
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s->state = 0;
|
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s->index = 0;
|
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s->packet_len = 0;
|
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s->nc.link_down = true;
|
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memset(s->buf, 0, sizeof(s->buf)); |
175 |
memset(s->nc.info_str, 0, sizeof(s->nc.info_str)); |
176 |
|
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return;
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} |
179 |
buf = buf1; |
180 |
while (size > 0) { |
181 |
/* reassemble a packet from the network */
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switch(s->state) {
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case 0: |
184 |
l = 4 - s->index;
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if (l > size)
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l = size; |
187 |
memcpy(s->buf + s->index, buf, l); |
188 |
buf += l; |
189 |
size -= l; |
190 |
s->index += l; |
191 |
if (s->index == 4) { |
192 |
/* got length */
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s->packet_len = ntohl(*(uint32_t *)s->buf); |
194 |
s->index = 0;
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s->state = 1;
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} |
197 |
break;
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198 |
case 1: |
199 |
l = s->packet_len - s->index; |
200 |
if (l > size)
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l = size; |
202 |
if (s->index + l <= sizeof(s->buf)) { |
203 |
memcpy(s->buf + s->index, buf, l); |
204 |
} 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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209 |
} |
210 |
|
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s->index += l; |
212 |
buf += l; |
213 |
size -= l; |
214 |
if (s->index >= s->packet_len) {
|
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qemu_send_packet(&s->nc, s->buf, s->packet_len); |
216 |
s->index = 0;
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217 |
s->state = 0;
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218 |
} |
219 |
break;
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220 |
} |
221 |
} |
222 |
} |
223 |
|
224 |
static void net_socket_send_dgram(void *opaque) |
225 |
{ |
226 |
NetSocketState *s = opaque; |
227 |
int size;
|
228 |
|
229 |
size = qemu_recv(s->fd, s->buf, sizeof(s->buf), 0); |
230 |
if (size < 0) |
231 |
return;
|
232 |
if (size == 0) { |
233 |
/* end of connection */
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234 |
net_socket_read_poll(s, false);
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net_socket_write_poll(s, false);
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return;
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237 |
} |
238 |
qemu_send_packet(&s->nc, s->buf, size); |
239 |
} |
240 |
|
241 |
static int net_socket_mcast_create(struct sockaddr_in *mcastaddr, struct in_addr *localaddr) |
242 |
{ |
243 |
struct ip_mreq imr;
|
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int fd;
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int val, ret;
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#ifdef __OpenBSD__
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unsigned char loop; |
248 |
#else
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int loop;
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#endif
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|
252 |
if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
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fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) "
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"does not contain a multicast address\n",
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inet_ntoa(mcastaddr->sin_addr), |
256 |
(int)ntohl(mcastaddr->sin_addr.s_addr));
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return -1; |
258 |
|
259 |
} |
260 |
fd = qemu_socket(PF_INET, SOCK_DGRAM, 0);
|
261 |
if (fd < 0) { |
262 |
perror("socket(PF_INET, SOCK_DGRAM)");
|
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return -1; |
264 |
} |
265 |
|
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val = 1;
|
267 |
ret=setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, |
268 |
(const char *)&val, sizeof(val)); |
269 |
if (ret < 0) { |
270 |
perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
|
271 |
goto fail;
|
272 |
} |
273 |
|
274 |
ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr)); |
275 |
if (ret < 0) { |
276 |
perror("bind");
|
277 |
goto fail;
|
278 |
} |
279 |
|
280 |
/* Add host to multicast group */
|
281 |
imr.imr_multiaddr = mcastaddr->sin_addr; |
282 |
if (localaddr) {
|
283 |
imr.imr_interface = *localaddr; |
284 |
} else {
|
285 |
imr.imr_interface.s_addr = htonl(INADDR_ANY); |
286 |
} |
287 |
|
288 |
ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, |
289 |
(const char *)&imr, sizeof(struct ip_mreq)); |
290 |
if (ret < 0) { |
291 |
perror("setsockopt(IP_ADD_MEMBERSHIP)");
|
292 |
goto fail;
|
293 |
} |
294 |
|
295 |
/* Force mcast msgs to loopback (eg. several QEMUs in same host */
|
296 |
loop = 1;
|
297 |
ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP, |
298 |
(const char *)&loop, sizeof(loop)); |
299 |
if (ret < 0) { |
300 |
perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
|
301 |
goto fail;
|
302 |
} |
303 |
|
304 |
/* If a bind address is given, only send packets from that address */
|
305 |
if (localaddr != NULL) { |
306 |
ret = setsockopt(fd, IPPROTO_IP, IP_MULTICAST_IF, |
307 |
(const char *)localaddr, sizeof(*localaddr)); |
308 |
if (ret < 0) { |
309 |
perror("setsockopt(IP_MULTICAST_IF)");
|
310 |
goto fail;
|
311 |
} |
312 |
} |
313 |
|
314 |
socket_set_nonblock(fd); |
315 |
return fd;
|
316 |
fail:
|
317 |
if (fd >= 0) |
318 |
closesocket(fd); |
319 |
return -1; |
320 |
} |
321 |
|
322 |
static void net_socket_cleanup(NetClientState *nc) |
323 |
{ |
324 |
NetSocketState *s = DO_UPCAST(NetSocketState, nc, nc); |
325 |
if (s->fd != -1) { |
326 |
net_socket_read_poll(s, false);
|
327 |
net_socket_write_poll(s, false);
|
328 |
close(s->fd); |
329 |
s->fd = -1;
|
330 |
} |
331 |
if (s->listen_fd != -1) { |
332 |
qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL); |
333 |
closesocket(s->listen_fd); |
334 |
s->listen_fd = -1;
|
335 |
} |
336 |
} |
337 |
|
338 |
static NetClientInfo net_dgram_socket_info = {
|
339 |
.type = NET_CLIENT_OPTIONS_KIND_SOCKET, |
340 |
.size = sizeof(NetSocketState),
|
341 |
.receive = net_socket_receive_dgram, |
342 |
.cleanup = net_socket_cleanup, |
343 |
}; |
344 |
|
345 |
static NetSocketState *net_socket_fd_init_dgram(NetClientState *peer,
|
346 |
const char *model, |
347 |
const char *name, |
348 |
int fd, int is_connected) |
349 |
{ |
350 |
struct sockaddr_in saddr;
|
351 |
int newfd;
|
352 |
socklen_t saddr_len; |
353 |
NetClientState *nc; |
354 |
NetSocketState *s; |
355 |
|
356 |
/* fd passed: multicast: "learn" dgram_dst address from bound address and save it
|
357 |
* Because this may be "shared" socket from a "master" process, datagrams would be recv()
|
358 |
* by ONLY ONE process: we must "clone" this dgram socket --jjo
|
359 |
*/
|
360 |
|
361 |
if (is_connected) {
|
362 |
if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) { |
363 |
/* must be bound */
|
364 |
if (saddr.sin_addr.s_addr == 0) { |
365 |
fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, "
|
366 |
"cannot setup multicast dst addr\n", fd);
|
367 |
goto err;
|
368 |
} |
369 |
/* clone dgram socket */
|
370 |
newfd = net_socket_mcast_create(&saddr, NULL);
|
371 |
if (newfd < 0) { |
372 |
/* error already reported by net_socket_mcast_create() */
|
373 |
goto err;
|
374 |
} |
375 |
/* clone newfd to fd, close newfd */
|
376 |
dup2(newfd, fd); |
377 |
close(newfd); |
378 |
|
379 |
} else {
|
380 |
fprintf(stderr, |
381 |
"qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
|
382 |
fd, strerror(errno)); |
383 |
goto err;
|
384 |
} |
385 |
} |
386 |
|
387 |
nc = qemu_new_net_client(&net_dgram_socket_info, peer, model, name); |
388 |
|
389 |
snprintf(nc->info_str, sizeof(nc->info_str),
|
390 |
"socket: fd=%d (%s mcast=%s:%d)",
|
391 |
fd, is_connected ? "cloned" : "", |
392 |
inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port)); |
393 |
|
394 |
s = DO_UPCAST(NetSocketState, nc, nc); |
395 |
|
396 |
s->fd = fd; |
397 |
s->listen_fd = -1;
|
398 |
s->send_fn = net_socket_send_dgram; |
399 |
net_socket_read_poll(s, true);
|
400 |
|
401 |
/* mcast: save bound address as dst */
|
402 |
if (is_connected) {
|
403 |
s->dgram_dst = saddr; |
404 |
} |
405 |
|
406 |
return s;
|
407 |
|
408 |
err:
|
409 |
closesocket(fd); |
410 |
return NULL; |
411 |
} |
412 |
|
413 |
static void net_socket_connect(void *opaque) |
414 |
{ |
415 |
NetSocketState *s = opaque; |
416 |
s->send_fn = net_socket_send; |
417 |
net_socket_read_poll(s, true);
|
418 |
} |
419 |
|
420 |
static NetClientInfo net_socket_info = {
|
421 |
.type = NET_CLIENT_OPTIONS_KIND_SOCKET, |
422 |
.size = sizeof(NetSocketState),
|
423 |
.receive = net_socket_receive, |
424 |
.cleanup = net_socket_cleanup, |
425 |
}; |
426 |
|
427 |
static NetSocketState *net_socket_fd_init_stream(NetClientState *peer,
|
428 |
const char *model, |
429 |
const char *name, |
430 |
int fd, int is_connected) |
431 |
{ |
432 |
NetClientState *nc; |
433 |
NetSocketState *s; |
434 |
|
435 |
nc = qemu_new_net_client(&net_socket_info, peer, model, name); |
436 |
|
437 |
snprintf(nc->info_str, sizeof(nc->info_str), "socket: fd=%d", fd); |
438 |
|
439 |
s = DO_UPCAST(NetSocketState, nc, nc); |
440 |
|
441 |
s->fd = fd; |
442 |
s->listen_fd = -1;
|
443 |
|
444 |
if (is_connected) {
|
445 |
net_socket_connect(s); |
446 |
} else {
|
447 |
qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
|
448 |
} |
449 |
return s;
|
450 |
} |
451 |
|
452 |
static NetSocketState *net_socket_fd_init(NetClientState *peer,
|
453 |
const char *model, const char *name, |
454 |
int fd, int is_connected) |
455 |
{ |
456 |
int so_type = -1, optlen=sizeof(so_type); |
457 |
|
458 |
if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type, |
459 |
(socklen_t *)&optlen)< 0) {
|
460 |
fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n",
|
461 |
fd); |
462 |
closesocket(fd); |
463 |
return NULL; |
464 |
} |
465 |
switch(so_type) {
|
466 |
case SOCK_DGRAM:
|
467 |
return net_socket_fd_init_dgram(peer, model, name, fd, is_connected);
|
468 |
case SOCK_STREAM:
|
469 |
return net_socket_fd_init_stream(peer, model, name, fd, is_connected);
|
470 |
default:
|
471 |
/* who knows ... this could be a eg. a pty, do warn and continue as stream */
|
472 |
fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
|
473 |
return net_socket_fd_init_stream(peer, model, name, fd, is_connected);
|
474 |
} |
475 |
return NULL; |
476 |
} |
477 |
|
478 |
static void net_socket_accept(void *opaque) |
479 |
{ |
480 |
NetSocketState *s = opaque; |
481 |
struct sockaddr_in saddr;
|
482 |
socklen_t len; |
483 |
int fd;
|
484 |
|
485 |
for(;;) {
|
486 |
len = sizeof(saddr);
|
487 |
fd = qemu_accept(s->listen_fd, (struct sockaddr *)&saddr, &len);
|
488 |
if (fd < 0 && errno != EINTR) { |
489 |
return;
|
490 |
} else if (fd >= 0) { |
491 |
qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL); |
492 |
break;
|
493 |
} |
494 |
} |
495 |
|
496 |
s->fd = fd; |
497 |
s->nc.link_down = false;
|
498 |
net_socket_connect(s); |
499 |
snprintf(s->nc.info_str, sizeof(s->nc.info_str),
|
500 |
"socket: connection from %s:%d",
|
501 |
inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port)); |
502 |
} |
503 |
|
504 |
static int net_socket_listen_init(NetClientState *peer, |
505 |
const char *model, |
506 |
const char *name, |
507 |
const char *host_str) |
508 |
{ |
509 |
NetClientState *nc; |
510 |
NetSocketState *s; |
511 |
struct sockaddr_in saddr;
|
512 |
int fd, val, ret;
|
513 |
|
514 |
if (parse_host_port(&saddr, host_str) < 0) |
515 |
return -1; |
516 |
|
517 |
fd = qemu_socket(PF_INET, SOCK_STREAM, 0);
|
518 |
if (fd < 0) { |
519 |
perror("socket");
|
520 |
return -1; |
521 |
} |
522 |
socket_set_nonblock(fd); |
523 |
|
524 |
/* allow fast reuse */
|
525 |
val = 1;
|
526 |
setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val)); |
527 |
|
528 |
ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr)); |
529 |
if (ret < 0) { |
530 |
perror("bind");
|
531 |
closesocket(fd); |
532 |
return -1; |
533 |
} |
534 |
ret = listen(fd, 0);
|
535 |
if (ret < 0) { |
536 |
perror("listen");
|
537 |
closesocket(fd); |
538 |
return -1; |
539 |
} |
540 |
|
541 |
nc = qemu_new_net_client(&net_socket_info, peer, model, name); |
542 |
s = DO_UPCAST(NetSocketState, nc, nc); |
543 |
s->fd = -1;
|
544 |
s->listen_fd = fd; |
545 |
s->nc.link_down = true;
|
546 |
|
547 |
qemu_set_fd_handler(s->listen_fd, net_socket_accept, NULL, s);
|
548 |
return 0; |
549 |
} |
550 |
|
551 |
static int net_socket_connect_init(NetClientState *peer, |
552 |
const char *model, |
553 |
const char *name, |
554 |
const char *host_str) |
555 |
{ |
556 |
NetSocketState *s; |
557 |
int fd, connected, ret, err;
|
558 |
struct sockaddr_in saddr;
|
559 |
|
560 |
if (parse_host_port(&saddr, host_str) < 0) |
561 |
return -1; |
562 |
|
563 |
fd = qemu_socket(PF_INET, SOCK_STREAM, 0);
|
564 |
if (fd < 0) { |
565 |
perror("socket");
|
566 |
return -1; |
567 |
} |
568 |
socket_set_nonblock(fd); |
569 |
|
570 |
connected = 0;
|
571 |
for(;;) {
|
572 |
ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr)); |
573 |
if (ret < 0) { |
574 |
err = socket_error(); |
575 |
if (err == EINTR || err == EWOULDBLOCK) {
|
576 |
} else if (err == EINPROGRESS) { |
577 |
break;
|
578 |
#ifdef _WIN32
|
579 |
} else if (err == WSAEALREADY || err == WSAEINVAL) { |
580 |
break;
|
581 |
#endif
|
582 |
} else {
|
583 |
perror("connect");
|
584 |
closesocket(fd); |
585 |
return -1; |
586 |
} |
587 |
} else {
|
588 |
connected = 1;
|
589 |
break;
|
590 |
} |
591 |
} |
592 |
s = net_socket_fd_init(peer, model, name, fd, connected); |
593 |
if (!s)
|
594 |
return -1; |
595 |
snprintf(s->nc.info_str, sizeof(s->nc.info_str),
|
596 |
"socket: connect to %s:%d",
|
597 |
inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port)); |
598 |
return 0; |
599 |
} |
600 |
|
601 |
static int net_socket_mcast_init(NetClientState *peer, |
602 |
const char *model, |
603 |
const char *name, |
604 |
const char *host_str, |
605 |
const char *localaddr_str) |
606 |
{ |
607 |
NetSocketState *s; |
608 |
int fd;
|
609 |
struct sockaddr_in saddr;
|
610 |
struct in_addr localaddr, *param_localaddr;
|
611 |
|
612 |
if (parse_host_port(&saddr, host_str) < 0) |
613 |
return -1; |
614 |
|
615 |
if (localaddr_str != NULL) { |
616 |
if (inet_aton(localaddr_str, &localaddr) == 0) |
617 |
return -1; |
618 |
param_localaddr = &localaddr; |
619 |
} else {
|
620 |
param_localaddr = NULL;
|
621 |
} |
622 |
|
623 |
fd = net_socket_mcast_create(&saddr, param_localaddr); |
624 |
if (fd < 0) |
625 |
return -1; |
626 |
|
627 |
s = net_socket_fd_init(peer, model, name, fd, 0);
|
628 |
if (!s)
|
629 |
return -1; |
630 |
|
631 |
s->dgram_dst = saddr; |
632 |
|
633 |
snprintf(s->nc.info_str, sizeof(s->nc.info_str),
|
634 |
"socket: mcast=%s:%d",
|
635 |
inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port)); |
636 |
return 0; |
637 |
|
638 |
} |
639 |
|
640 |
static int net_socket_udp_init(NetClientState *peer, |
641 |
const char *model, |
642 |
const char *name, |
643 |
const char *rhost, |
644 |
const char *lhost) |
645 |
{ |
646 |
NetSocketState *s; |
647 |
int fd, val, ret;
|
648 |
struct sockaddr_in laddr, raddr;
|
649 |
|
650 |
if (parse_host_port(&laddr, lhost) < 0) { |
651 |
return -1; |
652 |
} |
653 |
|
654 |
if (parse_host_port(&raddr, rhost) < 0) { |
655 |
return -1; |
656 |
} |
657 |
|
658 |
fd = qemu_socket(PF_INET, SOCK_DGRAM, 0);
|
659 |
if (fd < 0) { |
660 |
perror("socket(PF_INET, SOCK_DGRAM)");
|
661 |
return -1; |
662 |
} |
663 |
val = 1;
|
664 |
ret = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, |
665 |
(const char *)&val, sizeof(val)); |
666 |
if (ret < 0) { |
667 |
perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
|
668 |
closesocket(fd); |
669 |
return -1; |
670 |
} |
671 |
ret = bind(fd, (struct sockaddr *)&laddr, sizeof(laddr)); |
672 |
if (ret < 0) { |
673 |
perror("bind");
|
674 |
closesocket(fd); |
675 |
return -1; |
676 |
} |
677 |
|
678 |
s = net_socket_fd_init(peer, model, name, fd, 0);
|
679 |
if (!s) {
|
680 |
return -1; |
681 |
} |
682 |
|
683 |
s->dgram_dst = raddr; |
684 |
|
685 |
snprintf(s->nc.info_str, sizeof(s->nc.info_str),
|
686 |
"socket: udp=%s:%d",
|
687 |
inet_ntoa(raddr.sin_addr), ntohs(raddr.sin_port)); |
688 |
return 0; |
689 |
} |
690 |
|
691 |
int net_init_socket(const NetClientOptions *opts, const char *name, |
692 |
NetClientState *peer) |
693 |
{ |
694 |
const NetdevSocketOptions *sock;
|
695 |
|
696 |
assert(opts->kind == NET_CLIENT_OPTIONS_KIND_SOCKET); |
697 |
sock = opts->socket; |
698 |
|
699 |
if (sock->has_fd + sock->has_listen + sock->has_connect + sock->has_mcast +
|
700 |
sock->has_udp != 1) {
|
701 |
error_report("exactly one of fd=, listen=, connect=, mcast= or udp="
|
702 |
" is required");
|
703 |
return -1; |
704 |
} |
705 |
|
706 |
if (sock->has_localaddr && !sock->has_mcast && !sock->has_udp) {
|
707 |
error_report("localaddr= is only valid with mcast= or udp=");
|
708 |
return -1; |
709 |
} |
710 |
|
711 |
if (sock->has_fd) {
|
712 |
int fd;
|
713 |
|
714 |
fd = monitor_handle_fd_param(cur_mon, sock->fd); |
715 |
if (fd == -1 || !net_socket_fd_init(peer, "socket", name, fd, 1)) { |
716 |
return -1; |
717 |
} |
718 |
return 0; |
719 |
} |
720 |
|
721 |
if (sock->has_listen) {
|
722 |
if (net_socket_listen_init(peer, "socket", name, sock->listen) == -1) { |
723 |
return -1; |
724 |
} |
725 |
return 0; |
726 |
} |
727 |
|
728 |
if (sock->has_connect) {
|
729 |
if (net_socket_connect_init(peer, "socket", name, sock->connect) == |
730 |
-1) {
|
731 |
return -1; |
732 |
} |
733 |
return 0; |
734 |
} |
735 |
|
736 |
if (sock->has_mcast) {
|
737 |
/* if sock->localaddr is missing, it has been initialized to "all bits
|
738 |
* zero" */
|
739 |
if (net_socket_mcast_init(peer, "socket", name, sock->mcast, |
740 |
sock->localaddr) == -1) {
|
741 |
return -1; |
742 |
} |
743 |
return 0; |
744 |
} |
745 |
|
746 |
assert(sock->has_udp); |
747 |
if (!sock->has_localaddr) {
|
748 |
error_report("localaddr= is mandatory with udp=");
|
749 |
return -1; |
750 |
} |
751 |
if (net_socket_udp_init(peer, "udp", name, sock->udp, sock->localaddr) == |
752 |
-1) {
|
753 |
return -1; |
754 |
} |
755 |
return 0; |
756 |
} |