allow changing the speed of a running migration
[qemu-kvm/fedora.git] / net.c
blobd5560152671b553c182c654c58bfea7612e482ca
1 /*
2 * QEMU System Emulator
4 * Copyright (c) 2003-2008 Fabrice Bellard
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
24 #include <unistd.h>
25 #include <fcntl.h>
26 #include <signal.h>
27 #include <time.h>
28 #include <errno.h>
29 #include <sys/time.h>
30 #include <zlib.h>
32 /* Needed early for HOST_BSD etc. */
33 #include "config-host.h"
35 #ifndef _WIN32
36 #include <sys/times.h>
37 #include <sys/wait.h>
38 #include <termios.h>
39 #include <sys/mman.h>
40 #include <sys/ioctl.h>
41 #include <sys/resource.h>
42 #include <sys/socket.h>
43 #include <netinet/in.h>
44 #include <net/if.h>
45 #ifdef __NetBSD__
46 #include <net/if_tap.h>
47 #endif
48 #ifdef __linux__
49 #include <linux/if_tun.h>
50 #endif
51 #include <arpa/inet.h>
52 #include <dirent.h>
53 #include <netdb.h>
54 #include <sys/select.h>
55 #ifdef HOST_BSD
56 #include <sys/stat.h>
57 #if defined(__FreeBSD__) || defined(__DragonFly__)
58 #include <libutil.h>
59 #else
60 #include <util.h>
61 #endif
62 #elif defined (__GLIBC__) && defined (__FreeBSD_kernel__)
63 #include <freebsd/stdlib.h>
64 #else
65 #ifdef __linux__
66 #include <pty.h>
67 #include <malloc.h>
68 #include <linux/rtc.h>
70 /* For the benefit of older linux systems which don't supply it,
71 we use a local copy of hpet.h. */
72 /* #include <linux/hpet.h> */
73 #include "hpet.h"
75 #include <linux/ppdev.h>
76 #include <linux/parport.h>
77 #endif
78 #ifdef __sun__
79 #include <sys/stat.h>
80 #include <sys/ethernet.h>
81 #include <sys/sockio.h>
82 #include <netinet/arp.h>
83 #include <netinet/in.h>
84 #include <netinet/in_systm.h>
85 #include <netinet/ip.h>
86 #include <netinet/ip_icmp.h> // must come after ip.h
87 #include <netinet/udp.h>
88 #include <netinet/tcp.h>
89 #include <net/if.h>
90 #include <syslog.h>
91 #include <stropts.h>
92 #endif
93 #endif
94 #endif
96 #if defined(__OpenBSD__)
97 #include <util.h>
98 #endif
100 #if defined(CONFIG_VDE)
101 #include <libvdeplug.h>
102 #endif
104 #ifdef _WIN32
105 #include <windows.h>
106 #include <malloc.h>
107 #include <sys/timeb.h>
108 #include <mmsystem.h>
109 #define getopt_long_only getopt_long
110 #define memalign(align, size) malloc(size)
111 #endif
113 #include "qemu-common.h"
114 #include "net.h"
115 #include "monitor.h"
116 #include "sysemu.h"
117 #include "qemu-timer.h"
118 #include "qemu-char.h"
119 #include "audio/audio.h"
120 #include "qemu_socket.h"
121 #include "qemu-log.h"
123 #if defined(CONFIG_SLIRP)
124 #include "libslirp.h"
125 #endif
128 static VLANState *first_vlan;
130 /***********************************************************/
131 /* network device redirectors */
133 #if defined(DEBUG_NET) || defined(DEBUG_SLIRP)
134 static void hex_dump(FILE *f, const uint8_t *buf, int size)
136 int len, i, j, c;
138 for(i=0;i<size;i+=16) {
139 len = size - i;
140 if (len > 16)
141 len = 16;
142 fprintf(f, "%08x ", i);
143 for(j=0;j<16;j++) {
144 if (j < len)
145 fprintf(f, " %02x", buf[i+j]);
146 else
147 fprintf(f, " ");
149 fprintf(f, " ");
150 for(j=0;j<len;j++) {
151 c = buf[i+j];
152 if (c < ' ' || c > '~')
153 c = '.';
154 fprintf(f, "%c", c);
156 fprintf(f, "\n");
159 #endif
161 static int parse_macaddr(uint8_t *macaddr, const char *p)
163 int i;
164 char *last_char;
165 long int offset;
167 errno = 0;
168 offset = strtol(p, &last_char, 0);
169 if (0 == errno && '\0' == *last_char &&
170 offset >= 0 && offset <= 0xFFFFFF) {
171 macaddr[3] = (offset & 0xFF0000) >> 16;
172 macaddr[4] = (offset & 0xFF00) >> 8;
173 macaddr[5] = offset & 0xFF;
174 return 0;
175 } else {
176 for(i = 0; i < 6; i++) {
177 macaddr[i] = strtol(p, (char **)&p, 16);
178 if (i == 5) {
179 if (*p != '\0')
180 return -1;
181 } else {
182 if (*p != ':' && *p != '-')
183 return -1;
184 p++;
187 return 0;
190 return -1;
193 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
195 const char *p, *p1;
196 int len;
197 p = *pp;
198 p1 = strchr(p, sep);
199 if (!p1)
200 return -1;
201 len = p1 - p;
202 p1++;
203 if (buf_size > 0) {
204 if (len > buf_size - 1)
205 len = buf_size - 1;
206 memcpy(buf, p, len);
207 buf[len] = '\0';
209 *pp = p1;
210 return 0;
213 int parse_host_src_port(struct sockaddr_in *haddr,
214 struct sockaddr_in *saddr,
215 const char *input_str)
217 char *str = strdup(input_str);
218 char *host_str = str;
219 char *src_str;
220 const char *src_str2;
221 char *ptr;
224 * Chop off any extra arguments at the end of the string which
225 * would start with a comma, then fill in the src port information
226 * if it was provided else use the "any address" and "any port".
228 if ((ptr = strchr(str,',')))
229 *ptr = '\0';
231 if ((src_str = strchr(input_str,'@'))) {
232 *src_str = '\0';
233 src_str++;
236 if (parse_host_port(haddr, host_str) < 0)
237 goto fail;
239 src_str2 = src_str;
240 if (!src_str || *src_str == '\0')
241 src_str2 = ":0";
243 if (parse_host_port(saddr, src_str2) < 0)
244 goto fail;
246 free(str);
247 return(0);
249 fail:
250 free(str);
251 return -1;
254 int parse_host_port(struct sockaddr_in *saddr, const char *str)
256 char buf[512];
257 struct hostent *he;
258 const char *p, *r;
259 int port;
261 p = str;
262 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
263 return -1;
264 saddr->sin_family = AF_INET;
265 if (buf[0] == '\0') {
266 saddr->sin_addr.s_addr = 0;
267 } else {
268 if (qemu_isdigit(buf[0])) {
269 if (!inet_aton(buf, &saddr->sin_addr))
270 return -1;
271 } else {
272 if ((he = gethostbyname(buf)) == NULL)
273 return - 1;
274 saddr->sin_addr = *(struct in_addr *)he->h_addr;
277 port = strtol(p, (char **)&r, 0);
278 if (r == p)
279 return -1;
280 saddr->sin_port = htons(port);
281 return 0;
284 #if !defined(_WIN32) && 0
285 static int parse_unix_path(struct sockaddr_un *uaddr, const char *str)
287 const char *p;
288 int len;
290 len = MIN(108, strlen(str));
291 p = strchr(str, ',');
292 if (p)
293 len = MIN(len, p - str);
295 memset(uaddr, 0, sizeof(*uaddr));
297 uaddr->sun_family = AF_UNIX;
298 memcpy(uaddr->sun_path, str, len);
300 return 0;
302 #endif
304 void qemu_format_nic_info_str(VLANClientState *vc, uint8_t macaddr[6])
306 snprintf(vc->info_str, sizeof(vc->info_str),
307 "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x",
308 vc->model,
309 macaddr[0], macaddr[1], macaddr[2],
310 macaddr[3], macaddr[4], macaddr[5]);
313 static char *assign_name(VLANClientState *vc1, const char *model)
315 VLANState *vlan;
316 char buf[256];
317 int id = 0;
319 for (vlan = first_vlan; vlan; vlan = vlan->next) {
320 VLANClientState *vc;
322 for (vc = vlan->first_client; vc; vc = vc->next)
323 if (vc != vc1 && strcmp(vc->model, model) == 0)
324 id++;
327 snprintf(buf, sizeof(buf), "%s.%d", model, id);
329 return strdup(buf);
332 VLANClientState *qemu_new_vlan_client(VLANState *vlan,
333 const char *model,
334 const char *name,
335 IOReadHandler *fd_read,
336 IOCanRWHandler *fd_can_read,
337 NetCleanup *cleanup,
338 void *opaque)
340 VLANClientState *vc, **pvc;
341 vc = qemu_mallocz(sizeof(VLANClientState));
342 vc->model = strdup(model);
343 if (name)
344 vc->name = strdup(name);
345 else
346 vc->name = assign_name(vc, model);
347 vc->fd_read = fd_read;
348 vc->fd_can_read = fd_can_read;
349 vc->cleanup = cleanup;
350 vc->opaque = opaque;
351 vc->vlan = vlan;
353 vc->next = NULL;
354 pvc = &vlan->first_client;
355 while (*pvc != NULL)
356 pvc = &(*pvc)->next;
357 *pvc = vc;
358 return vc;
361 void qemu_del_vlan_client(VLANClientState *vc)
363 VLANClientState **pvc = &vc->vlan->first_client;
365 while (*pvc != NULL)
366 if (*pvc == vc) {
367 *pvc = vc->next;
368 if (vc->cleanup) {
369 vc->cleanup(vc);
371 free(vc->name);
372 free(vc->model);
373 qemu_free(vc);
374 break;
375 } else
376 pvc = &(*pvc)->next;
379 VLANClientState *qemu_find_vlan_client(VLANState *vlan, void *opaque)
381 VLANClientState **pvc = &vlan->first_client;
383 while (*pvc != NULL)
384 if ((*pvc)->opaque == opaque)
385 return *pvc;
386 else
387 pvc = &(*pvc)->next;
389 return NULL;
392 int qemu_can_send_packet(VLANClientState *vc1)
394 VLANState *vlan = vc1->vlan;
395 VLANClientState *vc;
397 for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
398 if (vc != vc1) {
399 if (vc->fd_can_read && vc->fd_can_read(vc->opaque))
400 return 1;
403 return 0;
406 static void
407 qemu_deliver_packet(VLANClientState *sender, const uint8_t *buf, int size)
409 VLANClientState *vc;
411 for (vc = sender->vlan->first_client; vc != NULL; vc = vc->next) {
412 if (vc != sender && !vc->link_down) {
413 vc->fd_read(vc->opaque, buf, size);
418 void qemu_send_packet(VLANClientState *vc, const uint8_t *buf, int size)
420 VLANState *vlan = vc->vlan;
421 VLANPacket *packet;
423 if (vc->link_down)
424 return;
426 #ifdef DEBUG_NET
427 printf("vlan %d send:\n", vlan->id);
428 hex_dump(stdout, buf, size);
429 #endif
430 if (vlan->delivering) {
431 packet = qemu_malloc(sizeof(VLANPacket) + size);
432 packet->next = vlan->send_queue;
433 packet->sender = vc;
434 packet->size = size;
435 memcpy(packet->data, buf, size);
436 vlan->send_queue = packet;
437 } else {
438 vlan->delivering = 1;
439 qemu_deliver_packet(vc, buf, size);
440 while ((packet = vlan->send_queue) != NULL) {
441 qemu_deliver_packet(packet->sender, packet->data, packet->size);
442 vlan->send_queue = packet->next;
443 qemu_free(packet);
445 vlan->delivering = 0;
449 static ssize_t vc_sendv_compat(VLANClientState *vc, const struct iovec *iov,
450 int iovcnt)
452 uint8_t buffer[4096];
453 size_t offset = 0;
454 int i;
456 for (i = 0; i < iovcnt; i++) {
457 size_t len;
459 len = MIN(sizeof(buffer) - offset, iov[i].iov_len);
460 memcpy(buffer + offset, iov[i].iov_base, len);
461 offset += len;
464 vc->fd_read(vc->opaque, buffer, offset);
466 return offset;
469 static ssize_t calc_iov_length(const struct iovec *iov, int iovcnt)
471 size_t offset = 0;
472 int i;
474 for (i = 0; i < iovcnt; i++)
475 offset += iov[i].iov_len;
476 return offset;
479 ssize_t qemu_sendv_packet(VLANClientState *vc1, const struct iovec *iov,
480 int iovcnt)
482 VLANState *vlan = vc1->vlan;
483 VLANClientState *vc;
484 ssize_t max_len = 0;
486 if (vc1->link_down)
487 return calc_iov_length(iov, iovcnt);
489 for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
490 ssize_t len = 0;
492 if (vc == vc1)
493 continue;
495 if (vc->link_down)
496 len = calc_iov_length(iov, iovcnt);
497 if (vc->fd_readv)
498 len = vc->fd_readv(vc->opaque, iov, iovcnt);
499 else if (vc->fd_read)
500 len = vc_sendv_compat(vc, iov, iovcnt);
502 max_len = MAX(max_len, len);
505 return max_len;
508 #if defined(CONFIG_SLIRP)
510 /* slirp network adapter */
512 static int slirp_inited;
513 static int slirp_restrict;
514 static char *slirp_ip;
515 static VLANClientState *slirp_vc;
517 int slirp_can_output(void)
519 return !slirp_vc || qemu_can_send_packet(slirp_vc);
522 void slirp_output(const uint8_t *pkt, int pkt_len)
524 #ifdef DEBUG_SLIRP
525 printf("slirp output:\n");
526 hex_dump(stdout, pkt, pkt_len);
527 #endif
528 if (!slirp_vc)
529 return;
530 qemu_send_packet(slirp_vc, pkt, pkt_len);
533 int slirp_is_inited(void)
535 return slirp_inited;
538 static void slirp_receive(void *opaque, const uint8_t *buf, int size)
540 #ifdef DEBUG_SLIRP
541 printf("slirp input:\n");
542 hex_dump(stdout, buf, size);
543 #endif
544 slirp_input(buf, size);
547 static int slirp_in_use;
549 static void net_slirp_cleanup(VLANClientState *vc)
551 slirp_in_use = 0;
554 static int net_slirp_init(VLANState *vlan, const char *model, const char *name)
556 if (slirp_in_use) {
557 /* slirp only supports a single instance so far */
558 return -1;
560 if (!slirp_inited) {
561 slirp_inited = 1;
562 slirp_init(slirp_restrict, slirp_ip);
564 slirp_vc = qemu_new_vlan_client(vlan, model, name,
565 slirp_receive, NULL, net_slirp_cleanup, NULL);
566 slirp_vc->info_str[0] = '\0';
567 slirp_in_use = 1;
568 return 0;
571 void net_slirp_redir(Monitor *mon, const char *redir_str)
573 int is_udp;
574 char buf[256], *r;
575 const char *p, *errmsg;
576 struct in_addr guest_addr;
577 int host_port, guest_port;
579 if (!slirp_inited) {
580 slirp_inited = 1;
581 slirp_init(slirp_restrict, slirp_ip);
584 p = redir_str;
585 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
586 goto fail_syntax;
587 if (!strcmp(buf, "tcp") || buf[0] == '\0') {
588 is_udp = 0;
589 } else if (!strcmp(buf, "udp")) {
590 is_udp = 1;
591 } else {
592 goto fail_syntax;
595 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
596 goto fail_syntax;
597 host_port = strtol(buf, &r, 0);
598 if (r == buf)
599 goto fail_syntax;
601 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
602 goto fail_syntax;
603 if (buf[0] == '\0') {
604 pstrcpy(buf, sizeof(buf), "10.0.2.15");
606 if (!inet_aton(buf, &guest_addr))
607 goto fail_syntax;
609 guest_port = strtol(p, &r, 0);
610 if (r == p)
611 goto fail_syntax;
613 if (slirp_redir(is_udp, host_port, guest_addr, guest_port) < 0) {
614 errmsg = "could not set up redirection\n";
615 goto fail;
617 return;
619 fail_syntax:
620 errmsg = "invalid redirection format\n";
621 fail:
622 if (mon) {
623 monitor_printf(mon, "%s", errmsg);
624 } else {
625 fprintf(stderr, "qemu: %s", errmsg);
626 exit(1);
630 #ifndef _WIN32
632 static char smb_dir[1024];
634 static void erase_dir(char *dir_name)
636 DIR *d;
637 struct dirent *de;
638 char filename[1024];
640 /* erase all the files in the directory */
641 if ((d = opendir(dir_name)) != NULL) {
642 for(;;) {
643 de = readdir(d);
644 if (!de)
645 break;
646 if (strcmp(de->d_name, ".") != 0 &&
647 strcmp(de->d_name, "..") != 0) {
648 snprintf(filename, sizeof(filename), "%s/%s",
649 smb_dir, de->d_name);
650 if (unlink(filename) != 0) /* is it a directory? */
651 erase_dir(filename);
654 closedir(d);
655 rmdir(dir_name);
659 /* automatic user mode samba server configuration */
660 static void smb_exit(void)
662 erase_dir(smb_dir);
665 /* automatic user mode samba server configuration */
666 void net_slirp_smb(const char *exported_dir)
668 char smb_conf[1024];
669 char smb_cmdline[1024];
670 FILE *f;
672 if (!slirp_inited) {
673 slirp_inited = 1;
674 slirp_init(slirp_restrict, slirp_ip);
677 /* XXX: better tmp dir construction */
678 snprintf(smb_dir, sizeof(smb_dir), "/tmp/qemu-smb.%ld", (long)getpid());
679 if (mkdir(smb_dir, 0700) < 0) {
680 fprintf(stderr, "qemu: could not create samba server dir '%s'\n", smb_dir);
681 exit(1);
683 snprintf(smb_conf, sizeof(smb_conf), "%s/%s", smb_dir, "smb.conf");
685 f = fopen(smb_conf, "w");
686 if (!f) {
687 fprintf(stderr, "qemu: could not create samba server configuration file '%s'\n", smb_conf);
688 exit(1);
690 fprintf(f,
691 "[global]\n"
692 "private dir=%s\n"
693 "smb ports=0\n"
694 "socket address=127.0.0.1\n"
695 "pid directory=%s\n"
696 "lock directory=%s\n"
697 "log file=%s/log.smbd\n"
698 "smb passwd file=%s/smbpasswd\n"
699 "security = share\n"
700 "[qemu]\n"
701 "path=%s\n"
702 "read only=no\n"
703 "guest ok=yes\n",
704 smb_dir,
705 smb_dir,
706 smb_dir,
707 smb_dir,
708 smb_dir,
709 exported_dir
711 fclose(f);
712 atexit(smb_exit);
714 snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -s %s",
715 SMBD_COMMAND, smb_conf);
717 slirp_add_exec(0, smb_cmdline, 4, 139);
720 #endif /* !defined(_WIN32) */
721 void do_info_slirp(Monitor *mon)
723 slirp_stats();
726 struct VMChannel {
727 CharDriverState *hd;
728 int port;
731 static int vmchannel_can_read(void *opaque)
733 struct VMChannel *vmc = (struct VMChannel*)opaque;
734 return slirp_socket_can_recv(4, vmc->port);
737 static void vmchannel_read(void *opaque, const uint8_t *buf, int size)
739 struct VMChannel *vmc = (struct VMChannel*)opaque;
740 slirp_socket_recv(4, vmc->port, buf, size);
743 #endif /* CONFIG_SLIRP */
745 #if !defined(_WIN32)
747 typedef struct TAPState {
748 VLANClientState *vc;
749 int fd;
750 char down_script[1024];
751 char down_script_arg[128];
752 } TAPState;
754 static int launch_script(const char *setup_script, const char *ifname, int fd);
756 static ssize_t tap_receive_iov(void *opaque, const struct iovec *iov,
757 int iovcnt)
759 TAPState *s = opaque;
760 ssize_t len;
762 do {
763 len = writev(s->fd, iov, iovcnt);
764 } while (len == -1 && (errno == EINTR || errno == EAGAIN));
766 return len;
769 static void tap_receive(void *opaque, const uint8_t *buf, int size)
771 TAPState *s = opaque;
772 int ret;
773 for(;;) {
774 ret = write(s->fd, buf, size);
775 if (ret < 0 && (errno == EINTR || errno == EAGAIN)) {
776 } else {
777 break;
782 static void tap_send(void *opaque)
784 TAPState *s = opaque;
785 uint8_t buf[4096];
786 int size;
788 #ifdef __sun__
789 struct strbuf sbuf;
790 int f = 0;
791 sbuf.maxlen = sizeof(buf);
792 sbuf.buf = (char *)buf;
793 size = getmsg(s->fd, NULL, &sbuf, &f) >=0 ? sbuf.len : -1;
794 #else
795 size = read(s->fd, buf, sizeof(buf));
796 #endif
797 if (size > 0) {
798 qemu_send_packet(s->vc, buf, size);
802 static void tap_cleanup(VLANClientState *vc)
804 TAPState *s = vc->opaque;
806 if (s->down_script[0])
807 launch_script(s->down_script, s->down_script_arg, s->fd);
809 qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
810 close(s->fd);
811 qemu_free(s);
814 /* fd support */
816 static TAPState *net_tap_fd_init(VLANState *vlan,
817 const char *model,
818 const char *name,
819 int fd)
821 TAPState *s;
823 s = qemu_mallocz(sizeof(TAPState));
824 s->fd = fd;
825 s->vc = qemu_new_vlan_client(vlan, model, name, tap_receive,
826 NULL, tap_cleanup, s);
827 s->vc->fd_readv = tap_receive_iov;
828 qemu_set_fd_handler(s->fd, tap_send, NULL, s);
829 snprintf(s->vc->info_str, sizeof(s->vc->info_str), "fd=%d", fd);
830 return s;
833 #if defined (HOST_BSD) || defined (__FreeBSD_kernel__)
834 static int tap_open(char *ifname, int ifname_size)
836 int fd;
837 char *dev;
838 struct stat s;
840 TFR(fd = open("/dev/tap", O_RDWR));
841 if (fd < 0) {
842 fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n");
843 return -1;
846 fstat(fd, &s);
847 dev = devname(s.st_rdev, S_IFCHR);
848 pstrcpy(ifname, ifname_size, dev);
850 fcntl(fd, F_SETFL, O_NONBLOCK);
851 return fd;
853 #elif defined(__sun__)
854 #define TUNNEWPPA (('T'<<16) | 0x0001)
856 * Allocate TAP device, returns opened fd.
857 * Stores dev name in the first arg(must be large enough).
859 static int tap_alloc(char *dev, size_t dev_size)
861 int tap_fd, if_fd, ppa = -1;
862 static int ip_fd = 0;
863 char *ptr;
865 static int arp_fd = 0;
866 int ip_muxid, arp_muxid;
867 struct strioctl strioc_if, strioc_ppa;
868 int link_type = I_PLINK;;
869 struct lifreq ifr;
870 char actual_name[32] = "";
872 memset(&ifr, 0x0, sizeof(ifr));
874 if( *dev ){
875 ptr = dev;
876 while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
877 ppa = atoi(ptr);
880 /* Check if IP device was opened */
881 if( ip_fd )
882 close(ip_fd);
884 TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
885 if (ip_fd < 0) {
886 syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)");
887 return -1;
890 TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
891 if (tap_fd < 0) {
892 syslog(LOG_ERR, "Can't open /dev/tap");
893 return -1;
896 /* Assign a new PPA and get its unit number. */
897 strioc_ppa.ic_cmd = TUNNEWPPA;
898 strioc_ppa.ic_timout = 0;
899 strioc_ppa.ic_len = sizeof(ppa);
900 strioc_ppa.ic_dp = (char *)&ppa;
901 if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
902 syslog (LOG_ERR, "Can't assign new interface");
904 TFR(if_fd = open("/dev/tap", O_RDWR, 0));
905 if (if_fd < 0) {
906 syslog(LOG_ERR, "Can't open /dev/tap (2)");
907 return -1;
909 if(ioctl(if_fd, I_PUSH, "ip") < 0){
910 syslog(LOG_ERR, "Can't push IP module");
911 return -1;
914 if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
915 syslog(LOG_ERR, "Can't get flags\n");
917 snprintf (actual_name, 32, "tap%d", ppa);
918 pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
920 ifr.lifr_ppa = ppa;
921 /* Assign ppa according to the unit number returned by tun device */
923 if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
924 syslog (LOG_ERR, "Can't set PPA %d", ppa);
925 if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
926 syslog (LOG_ERR, "Can't get flags\n");
927 /* Push arp module to if_fd */
928 if (ioctl (if_fd, I_PUSH, "arp") < 0)
929 syslog (LOG_ERR, "Can't push ARP module (2)");
931 /* Push arp module to ip_fd */
932 if (ioctl (ip_fd, I_POP, NULL) < 0)
933 syslog (LOG_ERR, "I_POP failed\n");
934 if (ioctl (ip_fd, I_PUSH, "arp") < 0)
935 syslog (LOG_ERR, "Can't push ARP module (3)\n");
936 /* Open arp_fd */
937 TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
938 if (arp_fd < 0)
939 syslog (LOG_ERR, "Can't open %s\n", "/dev/tap");
941 /* Set ifname to arp */
942 strioc_if.ic_cmd = SIOCSLIFNAME;
943 strioc_if.ic_timout = 0;
944 strioc_if.ic_len = sizeof(ifr);
945 strioc_if.ic_dp = (char *)&ifr;
946 if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
947 syslog (LOG_ERR, "Can't set ifname to arp\n");
950 if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
951 syslog(LOG_ERR, "Can't link TAP device to IP");
952 return -1;
955 if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
956 syslog (LOG_ERR, "Can't link TAP device to ARP");
958 close (if_fd);
960 memset(&ifr, 0x0, sizeof(ifr));
961 pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
962 ifr.lifr_ip_muxid = ip_muxid;
963 ifr.lifr_arp_muxid = arp_muxid;
965 if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
967 ioctl (ip_fd, I_PUNLINK , arp_muxid);
968 ioctl (ip_fd, I_PUNLINK, ip_muxid);
969 syslog (LOG_ERR, "Can't set multiplexor id");
972 snprintf(dev, dev_size, "tap%d", ppa);
973 return tap_fd;
976 static int tap_open(char *ifname, int ifname_size)
978 char dev[10]="";
979 int fd;
980 if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){
981 fprintf(stderr, "Cannot allocate TAP device\n");
982 return -1;
984 pstrcpy(ifname, ifname_size, dev);
985 fcntl(fd, F_SETFL, O_NONBLOCK);
986 return fd;
988 #elif defined (_AIX)
989 static int tap_open(char *ifname, int ifname_size)
991 fprintf (stderr, "no tap on AIX\n");
992 return -1;
994 #else
995 static int tap_open(char *ifname, int ifname_size)
997 struct ifreq ifr;
998 int fd, ret;
1000 TFR(fd = open("/dev/net/tun", O_RDWR));
1001 if (fd < 0) {
1002 fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n");
1003 return -1;
1005 memset(&ifr, 0, sizeof(ifr));
1006 ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
1007 if (ifname[0] != '\0')
1008 pstrcpy(ifr.ifr_name, IFNAMSIZ, ifname);
1009 else
1010 pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d");
1011 ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
1012 if (ret != 0) {
1013 fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n");
1014 close(fd);
1015 return -1;
1017 pstrcpy(ifname, ifname_size, ifr.ifr_name);
1018 fcntl(fd, F_SETFL, O_NONBLOCK);
1019 return fd;
1021 #endif
1023 static int launch_script(const char *setup_script, const char *ifname, int fd)
1025 int pid, status;
1026 char *args[3];
1027 char **parg;
1029 /* try to launch network script */
1030 pid = fork();
1031 if (pid >= 0) {
1032 if (pid == 0) {
1033 int open_max = sysconf (_SC_OPEN_MAX), i;
1034 for (i = 0; i < open_max; i++)
1035 if (i != STDIN_FILENO &&
1036 i != STDOUT_FILENO &&
1037 i != STDERR_FILENO &&
1038 i != fd)
1039 close(i);
1041 parg = args;
1042 *parg++ = (char *)setup_script;
1043 *parg++ = (char *)ifname;
1044 *parg++ = NULL;
1045 execv(setup_script, args);
1046 _exit(1);
1048 while (waitpid(pid, &status, 0) != pid);
1049 if (!WIFEXITED(status) ||
1050 WEXITSTATUS(status) != 0) {
1051 fprintf(stderr, "%s: could not launch network script\n",
1052 setup_script);
1053 return -1;
1056 return 0;
1059 static int net_tap_init(VLANState *vlan, const char *model,
1060 const char *name, const char *ifname1,
1061 const char *setup_script, const char *down_script)
1063 TAPState *s;
1064 int fd;
1065 char ifname[128];
1067 if (ifname1 != NULL)
1068 pstrcpy(ifname, sizeof(ifname), ifname1);
1069 else
1070 ifname[0] = '\0';
1071 TFR(fd = tap_open(ifname, sizeof(ifname)));
1072 if (fd < 0)
1073 return -1;
1075 if (!setup_script || !strcmp(setup_script, "no"))
1076 setup_script = "";
1077 if (setup_script[0] != '\0') {
1078 if (launch_script(setup_script, ifname, fd))
1079 return -1;
1081 s = net_tap_fd_init(vlan, model, name, fd);
1082 snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1083 "ifname=%s,script=%s,downscript=%s",
1084 ifname, setup_script, down_script);
1085 if (down_script && strcmp(down_script, "no")) {
1086 snprintf(s->down_script, sizeof(s->down_script), "%s", down_script);
1087 snprintf(s->down_script_arg, sizeof(s->down_script_arg), "%s", ifname);
1089 return 0;
1092 #endif /* !_WIN32 */
1094 #if defined(CONFIG_VDE)
1095 typedef struct VDEState {
1096 VLANClientState *vc;
1097 VDECONN *vde;
1098 } VDEState;
1100 static void vde_to_qemu(void *opaque)
1102 VDEState *s = opaque;
1103 uint8_t buf[4096];
1104 int size;
1106 size = vde_recv(s->vde, (char *)buf, sizeof(buf), 0);
1107 if (size > 0) {
1108 qemu_send_packet(s->vc, buf, size);
1112 static void vde_from_qemu(void *opaque, const uint8_t *buf, int size)
1114 VDEState *s = opaque;
1115 int ret;
1116 for(;;) {
1117 ret = vde_send(s->vde, (const char *)buf, size, 0);
1118 if (ret < 0 && errno == EINTR) {
1119 } else {
1120 break;
1125 static void vde_cleanup(VLANClientState *vc)
1127 VDEState *s = vc->opaque;
1128 qemu_set_fd_handler(vde_datafd(s->vde), NULL, NULL, NULL);
1129 vde_close(s->vde);
1130 qemu_free(s);
1133 static int net_vde_init(VLANState *vlan, const char *model,
1134 const char *name, const char *sock,
1135 int port, const char *group, int mode)
1137 VDEState *s;
1138 char *init_group = strlen(group) ? (char *)group : NULL;
1139 char *init_sock = strlen(sock) ? (char *)sock : NULL;
1141 struct vde_open_args args = {
1142 .port = port,
1143 .group = init_group,
1144 .mode = mode,
1147 s = qemu_mallocz(sizeof(VDEState));
1148 s->vde = vde_open(init_sock, (char *)"QEMU", &args);
1149 if (!s->vde){
1150 free(s);
1151 return -1;
1153 s->vc = qemu_new_vlan_client(vlan, model, name, vde_from_qemu,
1154 NULL, vde_cleanup, s);
1155 qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
1156 snprintf(s->vc->info_str, sizeof(s->vc->info_str), "sock=%s,fd=%d",
1157 sock, vde_datafd(s->vde));
1158 return 0;
1160 #endif
1162 /* network connection */
1163 typedef struct NetSocketState {
1164 VLANClientState *vc;
1165 int fd;
1166 int state; /* 0 = getting length, 1 = getting data */
1167 unsigned int index;
1168 unsigned int packet_len;
1169 uint8_t buf[4096];
1170 struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
1171 } NetSocketState;
1173 typedef struct NetSocketListenState {
1174 VLANState *vlan;
1175 char *model;
1176 char *name;
1177 int fd;
1178 } NetSocketListenState;
1180 /* XXX: we consider we can send the whole packet without blocking */
1181 static void net_socket_receive(void *opaque, const uint8_t *buf, int size)
1183 NetSocketState *s = opaque;
1184 uint32_t len;
1185 len = htonl(size);
1187 send_all(s->fd, (const uint8_t *)&len, sizeof(len));
1188 send_all(s->fd, buf, size);
1191 static void net_socket_receive_dgram(void *opaque, const uint8_t *buf, int size)
1193 NetSocketState *s = opaque;
1194 sendto(s->fd, buf, size, 0,
1195 (struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst));
1198 static void net_socket_send(void *opaque)
1200 NetSocketState *s = opaque;
1201 int size, err;
1202 unsigned l;
1203 uint8_t buf1[4096];
1204 const uint8_t *buf;
1206 size = recv(s->fd, buf1, sizeof(buf1), 0);
1207 if (size < 0) {
1208 err = socket_error();
1209 if (err != EWOULDBLOCK)
1210 goto eoc;
1211 } else if (size == 0) {
1212 /* end of connection */
1213 eoc:
1214 qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1215 closesocket(s->fd);
1216 return;
1218 buf = buf1;
1219 while (size > 0) {
1220 /* reassemble a packet from the network */
1221 switch(s->state) {
1222 case 0:
1223 l = 4 - s->index;
1224 if (l > size)
1225 l = size;
1226 memcpy(s->buf + s->index, buf, l);
1227 buf += l;
1228 size -= l;
1229 s->index += l;
1230 if (s->index == 4) {
1231 /* got length */
1232 s->packet_len = ntohl(*(uint32_t *)s->buf);
1233 s->index = 0;
1234 s->state = 1;
1236 break;
1237 case 1:
1238 l = s->packet_len - s->index;
1239 if (l > size)
1240 l = size;
1241 if (s->index + l <= sizeof(s->buf)) {
1242 memcpy(s->buf + s->index, buf, l);
1243 } else {
1244 fprintf(stderr, "serious error: oversized packet received,"
1245 "connection terminated.\n");
1246 s->state = 0;
1247 goto eoc;
1250 s->index += l;
1251 buf += l;
1252 size -= l;
1253 if (s->index >= s->packet_len) {
1254 qemu_send_packet(s->vc, s->buf, s->packet_len);
1255 s->index = 0;
1256 s->state = 0;
1258 break;
1263 static void net_socket_send_dgram(void *opaque)
1265 NetSocketState *s = opaque;
1266 int size;
1268 size = recv(s->fd, s->buf, sizeof(s->buf), 0);
1269 if (size < 0)
1270 return;
1271 if (size == 0) {
1272 /* end of connection */
1273 qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1274 return;
1276 qemu_send_packet(s->vc, s->buf, size);
1279 static int net_socket_mcast_create(struct sockaddr_in *mcastaddr)
1281 struct ip_mreq imr;
1282 int fd;
1283 int val, ret;
1284 if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
1285 fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n",
1286 inet_ntoa(mcastaddr->sin_addr),
1287 (int)ntohl(mcastaddr->sin_addr.s_addr));
1288 return -1;
1291 fd = socket(PF_INET, SOCK_DGRAM, 0);
1292 if (fd < 0) {
1293 perror("socket(PF_INET, SOCK_DGRAM)");
1294 return -1;
1297 val = 1;
1298 ret=setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
1299 (const char *)&val, sizeof(val));
1300 if (ret < 0) {
1301 perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
1302 goto fail;
1305 ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
1306 if (ret < 0) {
1307 perror("bind");
1308 goto fail;
1311 /* Add host to multicast group */
1312 imr.imr_multiaddr = mcastaddr->sin_addr;
1313 imr.imr_interface.s_addr = htonl(INADDR_ANY);
1315 ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1316 (const char *)&imr, sizeof(struct ip_mreq));
1317 if (ret < 0) {
1318 perror("setsockopt(IP_ADD_MEMBERSHIP)");
1319 goto fail;
1322 /* Force mcast msgs to loopback (eg. several QEMUs in same host */
1323 val = 1;
1324 ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1325 (const char *)&val, sizeof(val));
1326 if (ret < 0) {
1327 perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
1328 goto fail;
1331 socket_set_nonblock(fd);
1332 return fd;
1333 fail:
1334 if (fd >= 0)
1335 closesocket(fd);
1336 return -1;
1339 static void net_socket_cleanup(VLANClientState *vc)
1341 NetSocketState *s = vc->opaque;
1342 qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1343 close(s->fd);
1344 qemu_free(s);
1347 static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
1348 const char *model,
1349 const char *name,
1350 int fd, int is_connected)
1352 struct sockaddr_in saddr;
1353 int newfd;
1354 socklen_t saddr_len;
1355 NetSocketState *s;
1357 /* fd passed: multicast: "learn" dgram_dst address from bound address and save it
1358 * Because this may be "shared" socket from a "master" process, datagrams would be recv()
1359 * by ONLY ONE process: we must "clone" this dgram socket --jjo
1362 if (is_connected) {
1363 if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
1364 /* must be bound */
1365 if (saddr.sin_addr.s_addr==0) {
1366 fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, cannot setup multicast dst addr\n",
1367 fd);
1368 return NULL;
1370 /* clone dgram socket */
1371 newfd = net_socket_mcast_create(&saddr);
1372 if (newfd < 0) {
1373 /* error already reported by net_socket_mcast_create() */
1374 close(fd);
1375 return NULL;
1377 /* clone newfd to fd, close newfd */
1378 dup2(newfd, fd);
1379 close(newfd);
1381 } else {
1382 fprintf(stderr, "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
1383 fd, strerror(errno));
1384 return NULL;
1388 s = qemu_mallocz(sizeof(NetSocketState));
1389 s->fd = fd;
1391 s->vc = qemu_new_vlan_client(vlan, model, name, net_socket_receive_dgram,
1392 NULL, net_socket_cleanup, s);
1393 qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s);
1395 /* mcast: save bound address as dst */
1396 if (is_connected) s->dgram_dst=saddr;
1398 snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1399 "socket: fd=%d (%s mcast=%s:%d)",
1400 fd, is_connected? "cloned" : "",
1401 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1402 return s;
1405 static void net_socket_connect(void *opaque)
1407 NetSocketState *s = opaque;
1408 qemu_set_fd_handler(s->fd, net_socket_send, NULL, s);
1411 static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
1412 const char *model,
1413 const char *name,
1414 int fd, int is_connected)
1416 NetSocketState *s;
1417 s = qemu_mallocz(sizeof(NetSocketState));
1418 s->fd = fd;
1419 s->vc = qemu_new_vlan_client(vlan, model, name, net_socket_receive,
1420 NULL, net_socket_cleanup, s);
1421 snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1422 "socket: fd=%d", fd);
1423 if (is_connected) {
1424 net_socket_connect(s);
1425 } else {
1426 qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
1428 return s;
1431 static NetSocketState *net_socket_fd_init(VLANState *vlan,
1432 const char *model, const char *name,
1433 int fd, int is_connected)
1435 int so_type=-1, optlen=sizeof(so_type);
1437 if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type,
1438 (socklen_t *)&optlen)< 0) {
1439 fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n", fd);
1440 return NULL;
1442 switch(so_type) {
1443 case SOCK_DGRAM:
1444 return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected);
1445 case SOCK_STREAM:
1446 return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1447 default:
1448 /* who knows ... this could be a eg. a pty, do warn and continue as stream */
1449 fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
1450 return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1452 return NULL;
1455 static void net_socket_accept(void *opaque)
1457 NetSocketListenState *s = opaque;
1458 NetSocketState *s1;
1459 struct sockaddr_in saddr;
1460 socklen_t len;
1461 int fd;
1463 for(;;) {
1464 len = sizeof(saddr);
1465 fd = accept(s->fd, (struct sockaddr *)&saddr, &len);
1466 if (fd < 0 && errno != EINTR) {
1467 return;
1468 } else if (fd >= 0) {
1469 break;
1472 s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1);
1473 if (!s1) {
1474 closesocket(fd);
1475 } else {
1476 snprintf(s1->vc->info_str, sizeof(s1->vc->info_str),
1477 "socket: connection from %s:%d",
1478 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1482 static int net_socket_listen_init(VLANState *vlan,
1483 const char *model,
1484 const char *name,
1485 const char *host_str)
1487 NetSocketListenState *s;
1488 int fd, val, ret;
1489 struct sockaddr_in saddr;
1491 if (parse_host_port(&saddr, host_str) < 0)
1492 return -1;
1494 s = qemu_mallocz(sizeof(NetSocketListenState));
1496 fd = socket(PF_INET, SOCK_STREAM, 0);
1497 if (fd < 0) {
1498 perror("socket");
1499 return -1;
1501 socket_set_nonblock(fd);
1503 /* allow fast reuse */
1504 val = 1;
1505 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));
1507 ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
1508 if (ret < 0) {
1509 perror("bind");
1510 return -1;
1512 ret = listen(fd, 0);
1513 if (ret < 0) {
1514 perror("listen");
1515 return -1;
1517 s->vlan = vlan;
1518 s->model = strdup(model);
1519 s->name = name ? strdup(name) : NULL;
1520 s->fd = fd;
1521 qemu_set_fd_handler(fd, net_socket_accept, NULL, s);
1522 return 0;
1525 static int net_socket_connect_init(VLANState *vlan,
1526 const char *model,
1527 const char *name,
1528 const char *host_str)
1530 NetSocketState *s;
1531 int fd, connected, ret, err;
1532 struct sockaddr_in saddr;
1534 if (parse_host_port(&saddr, host_str) < 0)
1535 return -1;
1537 fd = socket(PF_INET, SOCK_STREAM, 0);
1538 if (fd < 0) {
1539 perror("socket");
1540 return -1;
1542 socket_set_nonblock(fd);
1544 connected = 0;
1545 for(;;) {
1546 ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
1547 if (ret < 0) {
1548 err = socket_error();
1549 if (err == EINTR || err == EWOULDBLOCK) {
1550 } else if (err == EINPROGRESS) {
1551 break;
1552 #ifdef _WIN32
1553 } else if (err == WSAEALREADY) {
1554 break;
1555 #endif
1556 } else {
1557 perror("connect");
1558 closesocket(fd);
1559 return -1;
1561 } else {
1562 connected = 1;
1563 break;
1566 s = net_socket_fd_init(vlan, model, name, fd, connected);
1567 if (!s)
1568 return -1;
1569 snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1570 "socket: connect to %s:%d",
1571 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1572 return 0;
1575 static int net_socket_mcast_init(VLANState *vlan,
1576 const char *model,
1577 const char *name,
1578 const char *host_str)
1580 NetSocketState *s;
1581 int fd;
1582 struct sockaddr_in saddr;
1584 if (parse_host_port(&saddr, host_str) < 0)
1585 return -1;
1588 fd = net_socket_mcast_create(&saddr);
1589 if (fd < 0)
1590 return -1;
1592 s = net_socket_fd_init(vlan, model, name, fd, 0);
1593 if (!s)
1594 return -1;
1596 s->dgram_dst = saddr;
1598 snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1599 "socket: mcast=%s:%d",
1600 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1601 return 0;
1605 typedef struct DumpState {
1606 VLANClientState *pcap_vc;
1607 int fd;
1608 int pcap_caplen;
1609 } DumpState;
1611 #define PCAP_MAGIC 0xa1b2c3d4
1613 struct pcap_file_hdr {
1614 uint32_t magic;
1615 uint16_t version_major;
1616 uint16_t version_minor;
1617 int32_t thiszone;
1618 uint32_t sigfigs;
1619 uint32_t snaplen;
1620 uint32_t linktype;
1623 struct pcap_sf_pkthdr {
1624 struct {
1625 int32_t tv_sec;
1626 int32_t tv_usec;
1627 } ts;
1628 uint32_t caplen;
1629 uint32_t len;
1632 static void dump_receive(void *opaque, const uint8_t *buf, int size)
1634 DumpState *s = opaque;
1635 struct pcap_sf_pkthdr hdr;
1636 int64_t ts;
1637 int caplen;
1639 /* Early return in case of previous error. */
1640 if (s->fd < 0) {
1641 return;
1644 ts = muldiv64 (qemu_get_clock(vm_clock),1000000, ticks_per_sec);
1645 caplen = size > s->pcap_caplen ? s->pcap_caplen : size;
1647 hdr.ts.tv_sec = ts / 1000000000LL;
1648 hdr.ts.tv_usec = ts % 1000000;
1649 hdr.caplen = caplen;
1650 hdr.len = size;
1651 if (write(s->fd, &hdr, sizeof(hdr)) != sizeof(hdr) ||
1652 write(s->fd, buf, caplen) != caplen) {
1653 qemu_log("-net dump write error - stop dump\n");
1654 close(s->fd);
1655 s->fd = -1;
1659 static void net_dump_cleanup(VLANClientState *vc)
1661 DumpState *s = vc->opaque;
1663 close(s->fd);
1664 qemu_free(s);
1667 static int net_dump_init(VLANState *vlan, const char *device,
1668 const char *name, const char *filename, int len)
1670 struct pcap_file_hdr hdr;
1671 DumpState *s;
1673 s = qemu_malloc(sizeof(DumpState));
1675 s->fd = open(filename, O_CREAT | O_WRONLY, 0644);
1676 if (s->fd < 0) {
1677 fprintf(stderr, "-net dump: can't open %s\n", filename);
1678 return -1;
1681 s->pcap_caplen = len;
1683 hdr.magic = PCAP_MAGIC;
1684 hdr.version_major = 2;
1685 hdr.version_minor = 4;
1686 hdr.thiszone = 0;
1687 hdr.sigfigs = 0;
1688 hdr.snaplen = s->pcap_caplen;
1689 hdr.linktype = 1;
1691 if (write(s->fd, &hdr, sizeof(hdr)) < sizeof(hdr)) {
1692 perror("-net dump write error");
1693 close(s->fd);
1694 qemu_free(s);
1695 return -1;
1698 s->pcap_vc = qemu_new_vlan_client(vlan, device, name, dump_receive, NULL,
1699 net_dump_cleanup, s);
1700 snprintf(s->pcap_vc->info_str, sizeof(s->pcap_vc->info_str),
1701 "dump to %s (len=%d)", filename, len);
1702 return 0;
1705 /* find or alloc a new VLAN */
1706 VLANState *qemu_find_vlan(int id)
1708 VLANState **pvlan, *vlan;
1709 for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1710 if (vlan->id == id)
1711 return vlan;
1713 vlan = qemu_mallocz(sizeof(VLANState));
1714 vlan->id = id;
1715 vlan->next = NULL;
1716 pvlan = &first_vlan;
1717 while (*pvlan != NULL)
1718 pvlan = &(*pvlan)->next;
1719 *pvlan = vlan;
1720 return vlan;
1723 static int nic_get_free_idx(void)
1725 int index;
1727 for (index = 0; index < MAX_NICS; index++)
1728 if (!nd_table[index].used)
1729 return index;
1730 return -1;
1733 void qemu_check_nic_model(NICInfo *nd, const char *model)
1735 const char *models[2];
1737 models[0] = model;
1738 models[1] = NULL;
1740 qemu_check_nic_model_list(nd, models, model);
1743 void qemu_check_nic_model_list(NICInfo *nd, const char * const *models,
1744 const char *default_model)
1746 int i, exit_status = 0;
1748 if (!nd->model)
1749 nd->model = strdup(default_model);
1751 if (strcmp(nd->model, "?") != 0) {
1752 for (i = 0 ; models[i]; i++)
1753 if (strcmp(nd->model, models[i]) == 0)
1754 return;
1756 fprintf(stderr, "qemu: Unsupported NIC model: %s\n", nd->model);
1757 exit_status = 1;
1760 fprintf(stderr, "qemu: Supported NIC models: ");
1761 for (i = 0 ; models[i]; i++)
1762 fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
1764 exit(exit_status);
1767 int net_client_init(const char *device, const char *p)
1769 static const char * const fd_params[] = {
1770 "vlan", "name", "fd", NULL
1772 char buf[1024];
1773 int vlan_id, ret;
1774 VLANState *vlan;
1775 char *name = NULL;
1777 vlan_id = 0;
1778 if (get_param_value(buf, sizeof(buf), "vlan", p)) {
1779 vlan_id = strtol(buf, NULL, 0);
1781 vlan = qemu_find_vlan(vlan_id);
1783 if (get_param_value(buf, sizeof(buf), "name", p)) {
1784 name = strdup(buf);
1786 if (!strcmp(device, "nic")) {
1787 static const char * const nic_params[] = {
1788 "vlan", "name", "macaddr", "model", NULL
1790 NICInfo *nd;
1791 uint8_t *macaddr;
1792 int idx = nic_get_free_idx();
1794 if (check_params(nic_params, p) < 0) {
1795 fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
1796 buf, p);
1797 return -1;
1799 if (idx == -1 || nb_nics >= MAX_NICS) {
1800 fprintf(stderr, "Too Many NICs\n");
1801 ret = -1;
1802 goto out;
1804 nd = &nd_table[idx];
1805 macaddr = nd->macaddr;
1806 macaddr[0] = 0x52;
1807 macaddr[1] = 0x54;
1808 macaddr[2] = 0x00;
1809 macaddr[3] = 0x12;
1810 macaddr[4] = 0x34;
1811 macaddr[5] = 0x56 + idx;
1813 if (get_param_value(buf, sizeof(buf), "macaddr", p)) {
1814 if (parse_macaddr(macaddr, buf) < 0) {
1815 fprintf(stderr, "invalid syntax for ethernet address\n");
1816 ret = -1;
1817 goto out;
1820 if (get_param_value(buf, sizeof(buf), "model", p)) {
1821 nd->model = strdup(buf);
1823 nd->vlan = vlan;
1824 nd->name = name;
1825 nd->used = 1;
1826 name = NULL;
1827 nb_nics++;
1828 vlan->nb_guest_devs++;
1829 ret = idx;
1830 } else
1831 if (!strcmp(device, "none")) {
1832 if (*p != '\0') {
1833 fprintf(stderr, "qemu: 'none' takes no parameters\n");
1834 return -1;
1836 /* does nothing. It is needed to signal that no network cards
1837 are wanted */
1838 ret = 0;
1839 } else
1840 #ifdef CONFIG_SLIRP
1841 if (!strcmp(device, "user")) {
1842 static const char * const slirp_params[] = {
1843 "vlan", "name", "hostname", "restrict", "ip", NULL
1845 if (check_params(slirp_params, p) < 0) {
1846 fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
1847 buf, p);
1848 return -1;
1850 if (get_param_value(buf, sizeof(buf), "hostname", p)) {
1851 pstrcpy(slirp_hostname, sizeof(slirp_hostname), buf);
1853 if (get_param_value(buf, sizeof(buf), "restrict", p)) {
1854 slirp_restrict = (buf[0] == 'y') ? 1 : 0;
1856 if (get_param_value(buf, sizeof(buf), "ip", p)) {
1857 slirp_ip = strdup(buf);
1859 vlan->nb_host_devs++;
1860 ret = net_slirp_init(vlan, device, name);
1861 } else if (!strcmp(device, "channel")) {
1862 long port;
1863 char name[20], *devname;
1864 struct VMChannel *vmc;
1866 port = strtol(p, &devname, 10);
1867 devname++;
1868 if (port < 1 || port > 65535) {
1869 fprintf(stderr, "vmchannel wrong port number\n");
1870 ret = -1;
1871 goto out;
1873 vmc = malloc(sizeof(struct VMChannel));
1874 snprintf(name, 20, "vmchannel%ld", port);
1875 vmc->hd = qemu_chr_open(name, devname, NULL);
1876 if (!vmc->hd) {
1877 fprintf(stderr, "qemu: could not open vmchannel device"
1878 "'%s'\n", devname);
1879 ret = -1;
1880 goto out;
1882 vmc->port = port;
1883 slirp_add_exec(3, vmc->hd, 4, port);
1884 qemu_chr_add_handlers(vmc->hd, vmchannel_can_read, vmchannel_read,
1885 NULL, vmc);
1886 ret = 0;
1887 } else
1888 #endif
1889 #ifdef _WIN32
1890 if (!strcmp(device, "tap")) {
1891 static const char * const tap_params[] = {
1892 "vlan", "name", "ifname", NULL
1894 char ifname[64];
1896 if (check_params(tap_params, p) < 0) {
1897 fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
1898 buf, p);
1899 return -1;
1901 if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
1902 fprintf(stderr, "tap: no interface name\n");
1903 ret = -1;
1904 goto out;
1906 vlan->nb_host_devs++;
1907 ret = tap_win32_init(vlan, device, name, ifname);
1908 } else
1909 #elif defined (_AIX)
1910 #else
1911 if (!strcmp(device, "tap")) {
1912 char ifname[64];
1913 char setup_script[1024], down_script[1024];
1914 int fd;
1915 vlan->nb_host_devs++;
1916 if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
1917 if (check_params(fd_params, p) < 0) {
1918 fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
1919 buf, p);
1920 return -1;
1922 fd = strtol(buf, NULL, 0);
1923 fcntl(fd, F_SETFL, O_NONBLOCK);
1924 net_tap_fd_init(vlan, device, name, fd);
1925 ret = 0;
1926 } else {
1927 static const char * const tap_params[] = {
1928 "vlan", "name", "ifname", "script", "downscript", NULL
1930 if (check_params(tap_params, p) < 0) {
1931 fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
1932 buf, p);
1933 return -1;
1935 if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
1936 ifname[0] = '\0';
1938 if (get_param_value(setup_script, sizeof(setup_script), "script", p) == 0) {
1939 pstrcpy(setup_script, sizeof(setup_script), DEFAULT_NETWORK_SCRIPT);
1941 if (get_param_value(down_script, sizeof(down_script), "downscript", p) == 0) {
1942 pstrcpy(down_script, sizeof(down_script), DEFAULT_NETWORK_DOWN_SCRIPT);
1944 ret = net_tap_init(vlan, device, name, ifname, setup_script, down_script);
1946 } else
1947 #endif
1948 if (!strcmp(device, "socket")) {
1949 if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
1950 int fd;
1951 if (check_params(fd_params, p) < 0) {
1952 fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
1953 buf, p);
1954 return -1;
1956 fd = strtol(buf, NULL, 0);
1957 ret = -1;
1958 if (net_socket_fd_init(vlan, device, name, fd, 1))
1959 ret = 0;
1960 } else if (get_param_value(buf, sizeof(buf), "listen", p) > 0) {
1961 static const char * const listen_params[] = {
1962 "vlan", "name", "listen", NULL
1964 if (check_params(listen_params, p) < 0) {
1965 fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
1966 buf, p);
1967 return -1;
1969 ret = net_socket_listen_init(vlan, device, name, buf);
1970 } else if (get_param_value(buf, sizeof(buf), "connect", p) > 0) {
1971 static const char * const connect_params[] = {
1972 "vlan", "name", "connect", NULL
1974 if (check_params(connect_params, p) < 0) {
1975 fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
1976 buf, p);
1977 return -1;
1979 ret = net_socket_connect_init(vlan, device, name, buf);
1980 } else if (get_param_value(buf, sizeof(buf), "mcast", p) > 0) {
1981 static const char * const mcast_params[] = {
1982 "vlan", "name", "mcast", NULL
1984 if (check_params(mcast_params, p) < 0) {
1985 fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
1986 buf, p);
1987 return -1;
1989 ret = net_socket_mcast_init(vlan, device, name, buf);
1990 } else {
1991 fprintf(stderr, "Unknown socket options: %s\n", p);
1992 ret = -1;
1993 goto out;
1995 vlan->nb_host_devs++;
1996 } else
1997 #ifdef CONFIG_VDE
1998 if (!strcmp(device, "vde")) {
1999 static const char * const vde_params[] = {
2000 "vlan", "name", "sock", "port", "group", "mode", NULL
2002 char vde_sock[1024], vde_group[512];
2003 int vde_port, vde_mode;
2005 if (check_params(vde_params, p) < 0) {
2006 fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
2007 buf, p);
2008 return -1;
2010 vlan->nb_host_devs++;
2011 if (get_param_value(vde_sock, sizeof(vde_sock), "sock", p) <= 0) {
2012 vde_sock[0] = '\0';
2014 if (get_param_value(buf, sizeof(buf), "port", p) > 0) {
2015 vde_port = strtol(buf, NULL, 10);
2016 } else {
2017 vde_port = 0;
2019 if (get_param_value(vde_group, sizeof(vde_group), "group", p) <= 0) {
2020 vde_group[0] = '\0';
2022 if (get_param_value(buf, sizeof(buf), "mode", p) > 0) {
2023 vde_mode = strtol(buf, NULL, 8);
2024 } else {
2025 vde_mode = 0700;
2027 ret = net_vde_init(vlan, device, name, vde_sock, vde_port, vde_group, vde_mode);
2028 } else
2029 #endif
2030 if (!strcmp(device, "dump")) {
2031 int len = 65536;
2033 if (get_param_value(buf, sizeof(buf), "len", p) > 0) {
2034 len = strtol(buf, NULL, 0);
2036 if (!get_param_value(buf, sizeof(buf), "file", p)) {
2037 snprintf(buf, sizeof(buf), "qemu-vlan%d.pcap", vlan_id);
2039 ret = net_dump_init(vlan, device, name, buf, len);
2040 } else {
2041 fprintf(stderr, "Unknown network device: %s\n", device);
2042 ret = -1;
2043 goto out;
2045 if (ret < 0) {
2046 fprintf(stderr, "Could not initialize device '%s'\n", device);
2048 out:
2049 if (name)
2050 free(name);
2051 return ret;
2054 void net_client_uninit(NICInfo *nd)
2056 nd->vlan->nb_guest_devs--;
2057 nb_nics--;
2058 nd->used = 0;
2059 free((void *)nd->model);
2062 static int net_host_check_device(const char *device)
2064 int i;
2065 const char *valid_param_list[] = { "tap", "socket", "dump"
2066 #ifdef CONFIG_SLIRP
2067 ,"user"
2068 #endif
2069 #ifdef CONFIG_VDE
2070 ,"vde"
2071 #endif
2073 for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) {
2074 if (!strncmp(valid_param_list[i], device,
2075 strlen(valid_param_list[i])))
2076 return 1;
2079 return 0;
2082 void net_host_device_add(Monitor *mon, const char *device, const char *opts)
2084 if (!net_host_check_device(device)) {
2085 monitor_printf(mon, "invalid host network device %s\n", device);
2086 return;
2088 if (net_client_init(device, opts ? opts : "") < 0) {
2089 monitor_printf(mon, "adding host network device %s failed\n", device);
2093 void net_host_device_remove(Monitor *mon, int vlan_id, const char *device)
2095 VLANState *vlan;
2096 VLANClientState *vc;
2098 vlan = qemu_find_vlan(vlan_id);
2100 for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
2101 if (!strcmp(vc->name, device)) {
2102 break;
2106 if (!vc) {
2107 monitor_printf(mon, "can't find device %s\n", device);
2108 return;
2110 if (!net_host_check_device(vc->model)) {
2111 monitor_printf(mon, "invalid host network device %s\n", device);
2112 return;
2114 qemu_del_vlan_client(vc);
2117 int net_client_parse(const char *str)
2119 const char *p;
2120 char *q;
2121 char device[64];
2123 p = str;
2124 q = device;
2125 while (*p != '\0' && *p != ',') {
2126 if ((q - device) < sizeof(device) - 1)
2127 *q++ = *p;
2128 p++;
2130 *q = '\0';
2131 if (*p == ',')
2132 p++;
2134 return net_client_init(device, p);
2137 void do_info_network(Monitor *mon)
2139 VLANState *vlan;
2140 VLANClientState *vc;
2142 for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2143 monitor_printf(mon, "VLAN %d devices:\n", vlan->id);
2144 for(vc = vlan->first_client; vc != NULL; vc = vc->next)
2145 monitor_printf(mon, " %s: %s\n", vc->name, vc->info_str);
2149 int do_set_link(Monitor *mon, const char *name, const char *up_or_down)
2151 VLANState *vlan;
2152 VLANClientState *vc = NULL;
2154 for (vlan = first_vlan; vlan != NULL; vlan = vlan->next)
2155 for (vc = vlan->first_client; vc != NULL; vc = vc->next)
2156 if (strcmp(vc->name, name) == 0)
2157 goto done;
2158 done:
2160 if (!vc) {
2161 monitor_printf(mon, "could not find network device '%s'", name);
2162 return 0;
2165 if (strcmp(up_or_down, "up") == 0)
2166 vc->link_down = 0;
2167 else if (strcmp(up_or_down, "down") == 0)
2168 vc->link_down = 1;
2169 else
2170 monitor_printf(mon, "invalid link status '%s'; only 'up' or 'down' "
2171 "valid\n", up_or_down);
2173 if (vc->link_status_changed)
2174 vc->link_status_changed(vc);
2176 return 1;
2179 void net_cleanup(void)
2181 VLANState *vlan;
2183 /* close network clients */
2184 for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2185 VLANClientState *vc = vlan->first_client;
2187 while (vc) {
2188 VLANClientState *next = vc->next;
2190 qemu_del_vlan_client(vc);
2192 vc = next;
2197 void net_client_check(void)
2199 VLANState *vlan;
2201 for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2202 if (vlan->nb_guest_devs == 0 && vlan->nb_host_devs == 0)
2203 continue;
2204 if (vlan->nb_guest_devs == 0)
2205 fprintf(stderr, "Warning: vlan %d with no nics\n", vlan->id);
2206 if (vlan->nb_host_devs == 0)
2207 fprintf(stderr,
2208 "Warning: vlan %d is not connected to host network\n",
2209 vlan->id);