net.c

   1 /*
   2  * QEMU System Emulator
   3  *
   4  * Copyright (c) 2003-2008 Fabrice Bellard
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24 #include <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>
  31
  32 /* Needed early for HOST_BSD etc. */
  33 #include "config-host.h"
  34
  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>
  69
  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"
  74
  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
  95
  96 #if defined(__OpenBSD__)
  97 #include <util.h>
  98 #endif
  99
 100 #if defined(CONFIG_VDE)
 101 #include <libvdeplug.h>
 102 #endif
 103
 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
 112
 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"
 122
 123 #if defined(CONFIG_SLIRP)
 124 #include "libslirp.h"
 125 #endif
 126
 127
 128 static VLANState *first_vlan;
 129
 130 /***********************************************************/
 131 /* network device redirectors */
 132
 133 #if defined(DEBUG_NET) || defined(DEBUG_SLIRP)
 134 static void hex_dump(FILE *f, const uint8_t *buf, int size)
 135 {
 136     int len, i, j, c;
 137
 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, "   ");
 148         }
 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);
 155         }
 156         fprintf(f, "\n");
 157     }
 158 }
 159 #endif
 160
 161 static int parse_macaddr(uint8_t *macaddr, const char *p)
 162 {
 163     int i;
 164     char *last_char;
 165     long int offset;
 166
 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++;
 185             }
 186         }
 187         return 0;
 188     }
 189
 190     return -1;
 191 }
 192
 193 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
 194 {
 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';
 208     }
 209     *pp = p1;
 210     return 0;
 211 }
 212
 213 int parse_host_src_port(struct sockaddr_in *haddr,
 214                         struct sockaddr_in *saddr,
 215                         const char *input_str)
 216 {
 217     char *str = strdup(input_str);
 218     char *host_str = str;
 219     char *src_str;
 220     const char *src_str2;
 221     char *ptr;
 222
 223     /*
 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".
 227      */
 228     if ((ptr = strchr(str,',')))
 229         *ptr = '\0';
 230
 231     if ((src_str = strchr(input_str,'@'))) {
 232         *src_str = '\0';
 233         src_str++;
 234     }
 235
 236     if (parse_host_port(haddr, host_str) < 0)
 237         goto fail;
 238
 239     src_str2 = src_str;
 240     if (!src_str || *src_str == '\0')
 241         src_str2 = ":0";
 242
 243     if (parse_host_port(saddr, src_str2) < 0)
 244         goto fail;
 245
 246     free(str);
 247     return(0);
 248
 249 fail:
 250     free(str);
 251     return -1;
 252 }
 253
 254 int parse_host_port(struct sockaddr_in *saddr, const char *str)
 255 {
 256     char buf[512];
 257     struct hostent *he;
 258     const char *p, *r;
 259     int port;
 260
 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;
 275         }
 276     }
 277     port = strtol(p, (char **)&r, 0);
 278     if (r == p)
 279         return -1;
 280     saddr->sin_port = htons(port);
 281     return 0;
 282 }
 283
 284 #if !defined(_WIN32) && 0
 285 static int parse_unix_path(struct sockaddr_un *uaddr, const char *str)
 286 {
 287     const char *p;
 288     int len;
 289
 290     len = MIN(108, strlen(str));
 291     p = strchr(str, ',');
 292     if (p)
 293         len = MIN(len, p - str);
 294
 295     memset(uaddr, 0, sizeof(*uaddr));
 296
 297     uaddr->sun_family = AF_UNIX;
 298     memcpy(uaddr->sun_path, str, len);
 299
 300     return 0;
 301 }
 302 #endif
 303
 304 void qemu_format_nic_info_str(VLANClientState *vc, uint8_t macaddr[6])
 305 {
 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]);
 311 }
 312
 313 static char *assign_name(VLANClientState *vc1, const char *model)
 314 {
 315     VLANState *vlan;
 316     char buf[256];
 317     int id = 0;
 318
 319     for (vlan = first_vlan; vlan; vlan = vlan->next) {
 320         VLANClientState *vc;
 321
 322         for (vc = vlan->first_client; vc; vc = vc->next)
 323             if (vc != vc1 && strcmp(vc->model, model) == 0)
 324                 id++;
 325     }
 326
 327     snprintf(buf, sizeof(buf), "%s.%d", model, id);
 328
 329     return strdup(buf);
 330 }
 331
 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)
 339 {
 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;
 352
 353     vc->next = NULL;
 354     pvc = &vlan->first_client;
 355     while (*pvc != NULL)
 356         pvc = &(*pvc)->next;
 357     *pvc = vc;
 358     return vc;
 359 }
 360
 361 void qemu_del_vlan_client(VLANClientState *vc)
 362 {
 363     VLANClientState **pvc = &vc->vlan->first_client;
 364
 365     while (*pvc != NULL)
 366         if (*pvc == vc) {
 367             *pvc = vc->next;
 368             if (vc->cleanup) {
 369                 vc->cleanup(vc);
 370             }
 371             free(vc->name);
 372             free(vc->model);
 373             qemu_free(vc);
 374             break;
 375         } else
 376             pvc = &(*pvc)->next;
 377 }
 378
 379 VLANClientState *qemu_find_vlan_client(VLANState *vlan, void *opaque)
 380 {
 381     VLANClientState **pvc = &vlan->first_client;
 382
 383     while (*pvc != NULL)
 384         if ((*pvc)->opaque == opaque)
 385             return *pvc;
 386         else
 387             pvc = &(*pvc)->next;
 388
 389     return NULL;
 390 }
 391
 392 int qemu_can_send_packet(VLANClientState *vc1)
 393 {
 394     VLANState *vlan = vc1->vlan;
 395     VLANClientState *vc;
 396
 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;
 401         }
 402     }
 403     return 0;
 404 }
 405
 406 void qemu_send_packet(VLANClientState *vc1, const uint8_t *buf, int size)
 407 {
 408     VLANState *vlan = vc1->vlan;
 409     VLANClientState *vc;
 410
 411     if (vc1->link_down)
 412         return;
 413
 414 #ifdef DEBUG_NET
 415     printf("vlan %d send:\n", vlan->id);
 416     hex_dump(stdout, buf, size);
 417 #endif
 418     for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
 419         if (vc != vc1 && !vc->link_down) {
 420             vc->fd_read(vc->opaque, buf, size);
 421         }
 422     }
 423 }
 424
 425 static ssize_t vc_sendv_compat(VLANClientState *vc, const struct iovec *iov,
 426                                int iovcnt)
 427 {
 428     uint8_t buffer[4096];
 429     size_t offset = 0;
 430     int i;
 431
 432     for (i = 0; i < iovcnt; i++) {
 433         size_t len;
 434
 435         len = MIN(sizeof(buffer) - offset, iov[i].iov_len);
 436         memcpy(buffer + offset, iov[i].iov_base, len);
 437         offset += len;
 438     }
 439
 440     vc->fd_read(vc->opaque, buffer, offset);
 441
 442     return offset;
 443 }
 444
 445 static ssize_t calc_iov_length(const struct iovec *iov, int iovcnt)
 446 {
 447     size_t offset = 0;
 448     int i;
 449
 450     for (i = 0; i < iovcnt; i++)
 451         offset += iov[i].iov_len;
 452     return offset;
 453 }
 454
 455 ssize_t qemu_sendv_packet(VLANClientState *vc1, const struct iovec *iov,
 456                           int iovcnt)
 457 {
 458     VLANState *vlan = vc1->vlan;
 459     VLANClientState *vc;
 460     ssize_t max_len = 0;
 461
 462     if (vc1->link_down)
 463         return calc_iov_length(iov, iovcnt);
 464
 465     for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
 466         ssize_t len = 0;
 467
 468         if (vc == vc1)
 469             continue;
 470
 471         if (vc->link_down)
 472             len = calc_iov_length(iov, iovcnt);
 473         if (vc->fd_readv)
 474             len = vc->fd_readv(vc->opaque, iov, iovcnt);
 475         else if (vc->fd_read)
 476             len = vc_sendv_compat(vc, iov, iovcnt);
 477
 478         max_len = MAX(max_len, len);
 479     }
 480
 481     return max_len;
 482 }
 483
 484 #if defined(CONFIG_SLIRP)
 485
 486 /* slirp network adapter */
 487
 488 static int slirp_inited;
 489 static int slirp_restrict;
 490 static char *slirp_ip;
 491 static VLANClientState *slirp_vc;
 492
 493 int slirp_can_output(void)
 494 {
 495     return !slirp_vc || qemu_can_send_packet(slirp_vc);
 496 }
 497
 498 void slirp_output(const uint8_t *pkt, int pkt_len)
 499 {
 500 #ifdef DEBUG_SLIRP
 501     printf("slirp output:\n");
 502     hex_dump(stdout, pkt, pkt_len);
 503 #endif
 504     if (!slirp_vc)
 505         return;
 506     qemu_send_packet(slirp_vc, pkt, pkt_len);
 507 }
 508
 509 int slirp_is_inited(void)
 510 {
 511     return slirp_inited;
 512 }
 513
 514 static void slirp_receive(void *opaque, const uint8_t *buf, int size)
 515 {
 516 #ifdef DEBUG_SLIRP
 517     printf("slirp input:\n");
 518     hex_dump(stdout, buf, size);
 519 #endif
 520     slirp_input(buf, size);
 521 }
 522
 523 static int net_slirp_init(VLANState *vlan, const char *model, const char *name)
 524 {
 525     if (!slirp_inited) {
 526         slirp_inited = 1;
 527         slirp_init(slirp_restrict, slirp_ip);
 528     }
 529     slirp_vc = qemu_new_vlan_client(vlan, model, name,
 530                                     slirp_receive, NULL, NULL, NULL);
 531     slirp_vc->info_str[0] = '\0';
 532     return 0;
 533 }
 534
 535 void net_slirp_redir(const char *redir_str)
 536 {
 537     int is_udp;
 538     char buf[256], *r;
 539     const char *p;
 540     struct in_addr guest_addr;
 541     int host_port, guest_port;
 542
 543     if (!slirp_inited) {
 544         slirp_inited = 1;
 545         slirp_init(slirp_restrict, slirp_ip);
 546     }
 547
 548     p = redir_str;
 549     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 550         goto fail;
 551     if (!strcmp(buf, "tcp")) {
 552         is_udp = 0;
 553     } else if (!strcmp(buf, "udp")) {
 554         is_udp = 1;
 555     } else {
 556         goto fail;
 557     }
 558
 559     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 560         goto fail;
 561     host_port = strtol(buf, &r, 0);
 562     if (r == buf)
 563         goto fail;
 564
 565     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 566         goto fail;
 567     if (buf[0] == '\0') {
 568         pstrcpy(buf, sizeof(buf), "10.0.2.15");
 569     }
 570     if (!inet_aton(buf, &guest_addr))
 571         goto fail;
 572
 573     guest_port = strtol(p, &r, 0);
 574     if (r == p)
 575         goto fail;
 576
 577     if (slirp_redir(is_udp, host_port, guest_addr, guest_port) < 0) {
 578         fprintf(stderr, "qemu: could not set up redirection\n");
 579         exit(1);
 580     }
 581     return;
 582  fail:
 583     fprintf(stderr, "qemu: syntax: -redir [tcp|udp]:host-port:[guest-host]:guest-port\n");
 584     exit(1);
 585 }
 586
 587 #ifndef _WIN32
 588
 589 static char smb_dir[1024];
 590
 591 static void erase_dir(char *dir_name)
 592 {
 593     DIR *d;
 594     struct dirent *de;
 595     char filename[1024];
 596
 597     /* erase all the files in the directory */
 598     if ((d = opendir(dir_name)) != NULL) {
 599         for(;;) {
 600             de = readdir(d);
 601             if (!de)
 602                 break;
 603             if (strcmp(de->d_name, ".") != 0 &&
 604                 strcmp(de->d_name, "..") != 0) {
 605                 snprintf(filename, sizeof(filename), "%s/%s",
 606                          smb_dir, de->d_name);
 607                 if (unlink(filename) != 0)  /* is it a directory? */
 608                     erase_dir(filename);
 609             }
 610         }
 611         closedir(d);
 612         rmdir(dir_name);
 613     }
 614 }
 615
 616 /* automatic user mode samba server configuration */
 617 static void smb_exit(void)
 618 {
 619     erase_dir(smb_dir);
 620 }
 621
 622 /* automatic user mode samba server configuration */
 623 void net_slirp_smb(const char *exported_dir)
 624 {
 625     char smb_conf[1024];
 626     char smb_cmdline[1024];
 627     FILE *f;
 628
 629     if (!slirp_inited) {
 630         slirp_inited = 1;
 631         slirp_init(slirp_restrict, slirp_ip);
 632     }
 633
 634     /* XXX: better tmp dir construction */
 635     snprintf(smb_dir, sizeof(smb_dir), "/tmp/qemu-smb.%ld", (long)getpid());
 636     if (mkdir(smb_dir, 0700) < 0) {
 637         fprintf(stderr, "qemu: could not create samba server dir '%s'\n", smb_dir);
 638         exit(1);
 639     }
 640     snprintf(smb_conf, sizeof(smb_conf), "%s/%s", smb_dir, "smb.conf");
 641
 642     f = fopen(smb_conf, "w");
 643     if (!f) {
 644         fprintf(stderr, "qemu: could not create samba server configuration file '%s'\n", smb_conf);
 645         exit(1);
 646     }
 647     fprintf(f,
 648             "[global]\n"
 649             "private dir=%s\n"
 650             "smb ports=0\n"
 651             "socket address=127.0.0.1\n"
 652             "pid directory=%s\n"
 653             "lock directory=%s\n"
 654             "log file=%s/log.smbd\n"
 655             "smb passwd file=%s/smbpasswd\n"
 656             "security = share\n"
 657             "[qemu]\n"
 658             "path=%s\n"
 659             "read only=no\n"
 660             "guest ok=yes\n",
 661             smb_dir,
 662             smb_dir,
 663             smb_dir,
 664             smb_dir,
 665             smb_dir,
 666             exported_dir
 667             );
 668     fclose(f);
 669     atexit(smb_exit);
 670
 671     snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -s %s",
 672              SMBD_COMMAND, smb_conf);
 673
 674     slirp_add_exec(0, smb_cmdline, 4, 139);
 675 }
 676
 677 #endif /* !defined(_WIN32) */
 678 void do_info_slirp(Monitor *mon)
 679 {
 680     slirp_stats();
 681 }
 682
 683 struct VMChannel {
 684     CharDriverState *hd;
 685     int port;
 686 };
 687
 688 static int vmchannel_can_read(void *opaque)
 689 {
 690     struct VMChannel *vmc = (struct VMChannel*)opaque;
 691     return slirp_socket_can_recv(4, vmc->port);
 692 }
 693
 694 static void vmchannel_read(void *opaque, const uint8_t *buf, int size)
 695 {
 696     struct VMChannel *vmc = (struct VMChannel*)opaque;
 697     slirp_socket_recv(4, vmc->port, buf, size);
 698 }
 699
 700 #endif /* CONFIG_SLIRP */
 701
 702 #if !defined(_WIN32)
 703
 704 typedef struct TAPState {
 705     VLANClientState *vc;
 706     int fd;
 707     char down_script[1024];
 708     char down_script_arg[128];
 709 } TAPState;
 710
 711 static int launch_script(const char *setup_script, const char *ifname, int fd);
 712
 713 static ssize_t tap_receive_iov(void *opaque, const struct iovec *iov,
 714                                int iovcnt)
 715 {
 716     TAPState *s = opaque;
 717     ssize_t len;
 718
 719     do {
 720         len = writev(s->fd, iov, iovcnt);
 721     } while (len == -1 && (errno == EINTR || errno == EAGAIN));
 722
 723     return len;
 724 }
 725
 726 static void tap_receive(void *opaque, const uint8_t *buf, int size)
 727 {
 728     TAPState *s = opaque;
 729     int ret;
 730     for(;;) {
 731         ret = write(s->fd, buf, size);
 732         if (ret < 0 && (errno == EINTR || errno == EAGAIN)) {
 733         } else {
 734             break;
 735         }
 736     }
 737 }
 738
 739 static void tap_send(void *opaque)
 740 {
 741     TAPState *s = opaque;
 742     uint8_t buf[4096];
 743     int size;
 744
 745 #ifdef __sun__
 746     struct strbuf sbuf;
 747     int f = 0;
 748     sbuf.maxlen = sizeof(buf);
 749     sbuf.buf = (char *)buf;
 750     size = getmsg(s->fd, NULL, &sbuf, &f) >=0 ? sbuf.len : -1;
 751 #else
 752     size = read(s->fd, buf, sizeof(buf));
 753 #endif
 754     if (size > 0) {
 755         qemu_send_packet(s->vc, buf, size);
 756     }
 757 }
 758
 759 static void tap_cleanup(VLANClientState *vc)
 760 {
 761     TAPState *s = vc->opaque;
 762
 763     if (s->down_script[0])
 764         launch_script(s->down_script, s->down_script_arg, s->fd);
 765
 766     qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
 767     close(s->fd);
 768     qemu_free(s);
 769 }
 770
 771 /* fd support */
 772
 773 static TAPState *net_tap_fd_init(VLANState *vlan,
 774                                  const char *model,
 775                                  const char *name,
 776                                  int fd)
 777 {
 778     TAPState *s;
 779
 780     s = qemu_mallocz(sizeof(TAPState));
 781     s->fd = fd;
 782     s->vc = qemu_new_vlan_client(vlan, model, name, tap_receive,
 783                                  NULL, tap_cleanup, s);
 784     s->vc->fd_readv = tap_receive_iov;
 785     qemu_set_fd_handler(s->fd, tap_send, NULL, s);
 786     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "fd=%d", fd);
 787     return s;
 788 }
 789
 790 #if defined (HOST_BSD) || defined (__FreeBSD_kernel__)
 791 static int tap_open(char *ifname, int ifname_size)
 792 {
 793     int fd;
 794     char *dev;
 795     struct stat s;
 796
 797     TFR(fd = open("/dev/tap", O_RDWR));
 798     if (fd < 0) {
 799         fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n");
 800         return -1;
 801     }
 802
 803     fstat(fd, &s);
 804     dev = devname(s.st_rdev, S_IFCHR);
 805     pstrcpy(ifname, ifname_size, dev);
 806
 807     fcntl(fd, F_SETFL, O_NONBLOCK);
 808     return fd;
 809 }
 810 #elif defined(__sun__)
 811 #define TUNNEWPPA       (('T'<<16) | 0x0001)
 812 /*
 813  * Allocate TAP device, returns opened fd.
 814  * Stores dev name in the first arg(must be large enough).
 815  */
 816 static int tap_alloc(char *dev, size_t dev_size)
 817 {
 818     int tap_fd, if_fd, ppa = -1;
 819     static int ip_fd = 0;
 820     char *ptr;
 821
 822     static int arp_fd = 0;
 823     int ip_muxid, arp_muxid;
 824     struct strioctl  strioc_if, strioc_ppa;
 825     int link_type = I_PLINK;;
 826     struct lifreq ifr;
 827     char actual_name[32] = "";
 828
 829     memset(&ifr, 0x0, sizeof(ifr));
 830
 831     if( *dev ){
 832        ptr = dev;
 833        while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
 834        ppa = atoi(ptr);
 835     }
 836
 837     /* Check if IP device was opened */
 838     if( ip_fd )
 839        close(ip_fd);
 840
 841     TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
 842     if (ip_fd < 0) {
 843        syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)");
 844        return -1;
 845     }
 846
 847     TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
 848     if (tap_fd < 0) {
 849        syslog(LOG_ERR, "Can't open /dev/tap");
 850        return -1;
 851     }
 852
 853     /* Assign a new PPA and get its unit number. */
 854     strioc_ppa.ic_cmd = TUNNEWPPA;
 855     strioc_ppa.ic_timout = 0;
 856     strioc_ppa.ic_len = sizeof(ppa);
 857     strioc_ppa.ic_dp = (char *)&ppa;
 858     if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
 859        syslog (LOG_ERR, "Can't assign new interface");
 860
 861     TFR(if_fd = open("/dev/tap", O_RDWR, 0));
 862     if (if_fd < 0) {
 863        syslog(LOG_ERR, "Can't open /dev/tap (2)");
 864        return -1;
 865     }
 866     if(ioctl(if_fd, I_PUSH, "ip") < 0){
 867        syslog(LOG_ERR, "Can't push IP module");
 868        return -1;
 869     }
 870
 871     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
 872         syslog(LOG_ERR, "Can't get flags\n");
 873
 874     snprintf (actual_name, 32, "tap%d", ppa);
 875     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
 876
 877     ifr.lifr_ppa = ppa;
 878     /* Assign ppa according to the unit number returned by tun device */
 879
 880     if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
 881         syslog (LOG_ERR, "Can't set PPA %d", ppa);
 882     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
 883         syslog (LOG_ERR, "Can't get flags\n");
 884     /* Push arp module to if_fd */
 885     if (ioctl (if_fd, I_PUSH, "arp") < 0)
 886         syslog (LOG_ERR, "Can't push ARP module (2)");
 887
 888     /* Push arp module to ip_fd */
 889     if (ioctl (ip_fd, I_POP, NULL) < 0)
 890         syslog (LOG_ERR, "I_POP failed\n");
 891     if (ioctl (ip_fd, I_PUSH, "arp") < 0)
 892         syslog (LOG_ERR, "Can't push ARP module (3)\n");
 893     /* Open arp_fd */
 894     TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
 895     if (arp_fd < 0)
 896        syslog (LOG_ERR, "Can't open %s\n", "/dev/tap");
 897
 898     /* Set ifname to arp */
 899     strioc_if.ic_cmd = SIOCSLIFNAME;
 900     strioc_if.ic_timout = 0;
 901     strioc_if.ic_len = sizeof(ifr);
 902     strioc_if.ic_dp = (char *)&ifr;
 903     if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
 904         syslog (LOG_ERR, "Can't set ifname to arp\n");
 905     }
 906
 907     if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
 908        syslog(LOG_ERR, "Can't link TAP device to IP");
 909        return -1;
 910     }
 911
 912     if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
 913         syslog (LOG_ERR, "Can't link TAP device to ARP");
 914
 915     close (if_fd);
 916
 917     memset(&ifr, 0x0, sizeof(ifr));
 918     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
 919     ifr.lifr_ip_muxid  = ip_muxid;
 920     ifr.lifr_arp_muxid = arp_muxid;
 921
 922     if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
 923     {
 924       ioctl (ip_fd, I_PUNLINK , arp_muxid);
 925       ioctl (ip_fd, I_PUNLINK, ip_muxid);
 926       syslog (LOG_ERR, "Can't set multiplexor id");
 927     }
 928
 929     snprintf(dev, dev_size, "tap%d", ppa);
 930     return tap_fd;
 931 }
 932
 933 static int tap_open(char *ifname, int ifname_size)
 934 {
 935     char  dev[10]="";
 936     int fd;
 937     if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){
 938        fprintf(stderr, "Cannot allocate TAP device\n");
 939        return -1;
 940     }
 941     pstrcpy(ifname, ifname_size, dev);
 942     fcntl(fd, F_SETFL, O_NONBLOCK);
 943     return fd;
 944 }
 945 #elif defined (_AIX)
 946 static int tap_open(char *ifname, int ifname_size)
 947 {
 948     fprintf (stderr, "no tap on AIX\n");
 949     return -1;
 950 }
 951 #else
 952 static int tap_open(char *ifname, int ifname_size)
 953 {
 954     struct ifreq ifr;
 955     int fd, ret;
 956
 957     TFR(fd = open("/dev/net/tun", O_RDWR));
 958     if (fd < 0) {
 959         fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n");
 960         return -1;
 961     }
 962     memset(&ifr, 0, sizeof(ifr));
 963     ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
 964     if (ifname[0] != '\0')
 965         pstrcpy(ifr.ifr_name, IFNAMSIZ, ifname);
 966     else
 967         pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d");
 968     ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
 969     if (ret != 0) {
 970         fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n");
 971         close(fd);
 972         return -1;
 973     }
 974     pstrcpy(ifname, ifname_size, ifr.ifr_name);
 975     fcntl(fd, F_SETFL, O_NONBLOCK);
 976     return fd;
 977 }
 978 #endif
 979
 980 static int launch_script(const char *setup_script, const char *ifname, int fd)
 981 {
 982     int pid, status;
 983     char *args[3];
 984     char **parg;
 985
 986         /* try to launch network script */
 987         pid = fork();
 988         if (pid >= 0) {
 989             if (pid == 0) {
 990                 int open_max = sysconf (_SC_OPEN_MAX), i;
 991                 for (i = 0; i < open_max; i++)
 992                     if (i != STDIN_FILENO &&
 993                         i != STDOUT_FILENO &&
 994                         i != STDERR_FILENO &&
 995                         i != fd)
 996                         close(i);
 997
 998                 parg = args;
 999                 *parg++ = (char *)setup_script;
1000                 *parg++ = (char *)ifname;
1001                 *parg++ = NULL;
1002                 execv(setup_script, args);
1003                 _exit(1);
1004             }
1005             while (waitpid(pid, &status, 0) != pid);
1006             if (!WIFEXITED(status) ||
1007                 WEXITSTATUS(status) != 0) {
1008                 fprintf(stderr, "%s: could not launch network script\n",
1009                         setup_script);
1010                 return -1;
1011             }
1012         }
1013     return 0;
1014 }
1015
1016 static int net_tap_init(VLANState *vlan, const char *model,
1017                         const char *name, const char *ifname1,
1018                         const char *setup_script, const char *down_script)
1019 {
1020     TAPState *s;
1021     int fd;
1022     char ifname[128];
1023
1024     if (ifname1 != NULL)
1025         pstrcpy(ifname, sizeof(ifname), ifname1);
1026     else
1027         ifname[0] = '\0';
1028     TFR(fd = tap_open(ifname, sizeof(ifname)));
1029     if (fd < 0)
1030         return -1;
1031
1032     if (!setup_script || !strcmp(setup_script, "no"))
1033         setup_script = "";
1034     if (setup_script[0] != '\0') {
1035         if (launch_script(setup_script, ifname, fd))
1036             return -1;
1037     }
1038     s = net_tap_fd_init(vlan, model, name, fd);
1039     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1040              "ifname=%s,script=%s,downscript=%s",
1041              ifname, setup_script, down_script);
1042     if (down_script && strcmp(down_script, "no")) {
1043         snprintf(s->down_script, sizeof(s->down_script), "%s", down_script);
1044         snprintf(s->down_script_arg, sizeof(s->down_script_arg), "%s", ifname);
1045     }
1046     return 0;
1047 }
1048
1049 #endif /* !_WIN32 */
1050
1051 #if defined(CONFIG_VDE)
1052 typedef struct VDEState {
1053     VLANClientState *vc;
1054     VDECONN *vde;
1055 } VDEState;
1056
1057 static void vde_to_qemu(void *opaque)
1058 {
1059     VDEState *s = opaque;
1060     uint8_t buf[4096];
1061     int size;
1062
1063     size = vde_recv(s->vde, buf, sizeof(buf), 0);
1064     if (size > 0) {
1065         qemu_send_packet(s->vc, buf, size);
1066     }
1067 }
1068
1069 static void vde_from_qemu(void *opaque, const uint8_t *buf, int size)
1070 {
1071     VDEState *s = opaque;
1072     int ret;
1073     for(;;) {
1074         ret = vde_send(s->vde, buf, size, 0);
1075         if (ret < 0 && errno == EINTR) {
1076         } else {
1077             break;
1078         }
1079     }
1080 }
1081
1082 static void vde_cleanup(VLANClientState *vc)
1083 {
1084     VDEState *s = vc->opaque;
1085     qemu_set_fd_handler(vde_datafd(s->vde), NULL, NULL, NULL);
1086     vde_close(s->vde);
1087     qemu_free(s);
1088 }
1089
1090 static int net_vde_init(VLANState *vlan, const char *model,
1091                         const char *name, const char *sock,
1092                         int port, const char *group, int mode)
1093 {
1094     VDEState *s;
1095     char *init_group = strlen(group) ? (char *)group : NULL;
1096     char *init_sock = strlen(sock) ? (char *)sock : NULL;
1097
1098     struct vde_open_args args = {
1099         .port = port,
1100         .group = init_group,
1101         .mode = mode,
1102     };
1103
1104     s = qemu_mallocz(sizeof(VDEState));
1105     s->vde = vde_open(init_sock, "QEMU", &args);
1106     if (!s->vde){
1107         free(s);
1108         return -1;
1109     }
1110     s->vc = qemu_new_vlan_client(vlan, model, name, vde_from_qemu,
1111                                  NULL, vde_cleanup, s);
1112     qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
1113     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "sock=%s,fd=%d",
1114              sock, vde_datafd(s->vde));
1115     return 0;
1116 }
1117 #endif
1118
1119 /* network connection */
1120 typedef struct NetSocketState {
1121     VLANClientState *vc;
1122     int fd;
1123     int state; /* 0 = getting length, 1 = getting data */
1124     unsigned int index;
1125     unsigned int packet_len;
1126     uint8_t buf[4096];
1127     struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
1128 } NetSocketState;
1129
1130 typedef struct NetSocketListenState {
1131     VLANState *vlan;
1132     char *model;
1133     char *name;
1134     int fd;
1135 } NetSocketListenState;
1136
1137 /* XXX: we consider we can send the whole packet without blocking */
1138 static void net_socket_receive(void *opaque, const uint8_t *buf, int size)
1139 {
1140     NetSocketState *s = opaque;
1141     uint32_t len;
1142     len = htonl(size);
1143
1144     send_all(s->fd, (const uint8_t *)&len, sizeof(len));
1145     send_all(s->fd, buf, size);
1146 }
1147
1148 static void net_socket_receive_dgram(void *opaque, const uint8_t *buf, int size)
1149 {
1150     NetSocketState *s = opaque;
1151     sendto(s->fd, buf, size, 0,
1152            (struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst));
1153 }
1154
1155 static void net_socket_send(void *opaque)
1156 {
1157     NetSocketState *s = opaque;
1158     int size, err;
1159     unsigned l;
1160     uint8_t buf1[4096];
1161     const uint8_t *buf;
1162
1163     size = recv(s->fd, buf1, sizeof(buf1), 0);
1164     if (size < 0) {
1165         err = socket_error();
1166         if (err != EWOULDBLOCK)
1167             goto eoc;
1168     } else if (size == 0) {
1169         /* end of connection */
1170     eoc:
1171         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1172         closesocket(s->fd);
1173         return;
1174     }
1175     buf = buf1;
1176     while (size > 0) {
1177         /* reassemble a packet from the network */
1178         switch(s->state) {
1179         case 0:
1180             l = 4 - s->index;
1181             if (l > size)
1182                 l = size;
1183             memcpy(s->buf + s->index, buf, l);
1184             buf += l;
1185             size -= l;
1186             s->index += l;
1187             if (s->index == 4) {
1188                 /* got length */
1189                 s->packet_len = ntohl(*(uint32_t *)s->buf);
1190                 s->index = 0;
1191                 s->state = 1;
1192             }
1193             break;
1194         case 1:
1195             l = s->packet_len - s->index;
1196             if (l > size)
1197                 l = size;
1198             if (s->index + l <= sizeof(s->buf)) {
1199                 memcpy(s->buf + s->index, buf, l);
1200             } else {
1201                 fprintf(stderr, "serious error: oversized packet received,"
1202                     "connection terminated.\n");
1203                 s->state = 0;
1204                 goto eoc;
1205             }
1206
1207             s->index += l;
1208             buf += l;
1209             size -= l;
1210             if (s->index >= s->packet_len) {
1211                 qemu_send_packet(s->vc, s->buf, s->packet_len);
1212                 s->index = 0;
1213                 s->state = 0;
1214             }
1215             break;
1216         }
1217     }
1218 }
1219
1220 static void net_socket_send_dgram(void *opaque)
1221 {
1222     NetSocketState *s = opaque;
1223     int size;
1224
1225     size = recv(s->fd, s->buf, sizeof(s->buf), 0);
1226     if (size < 0)
1227         return;
1228     if (size == 0) {
1229         /* end of connection */
1230         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1231         return;
1232     }
1233     qemu_send_packet(s->vc, s->buf, size);
1234 }
1235
1236 static int net_socket_mcast_create(struct sockaddr_in *mcastaddr)
1237 {
1238     struct ip_mreq imr;
1239     int fd;
1240     int val, ret;
1241     if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
1242         fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n",
1243                 inet_ntoa(mcastaddr->sin_addr),
1244                 (int)ntohl(mcastaddr->sin_addr.s_addr));
1245         return -1;
1246
1247     }
1248     fd = socket(PF_INET, SOCK_DGRAM, 0);
1249     if (fd < 0) {
1250         perror("socket(PF_INET, SOCK_DGRAM)");
1251         return -1;
1252     }
1253
1254     val = 1;
1255     ret=setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
1256                    (const char *)&val, sizeof(val));
1257     if (ret < 0) {
1258         perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
1259         goto fail;
1260     }
1261
1262     ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
1263     if (ret < 0) {
1264         perror("bind");
1265         goto fail;
1266     }
1267
1268     /* Add host to multicast group */
1269     imr.imr_multiaddr = mcastaddr->sin_addr;
1270     imr.imr_interface.s_addr = htonl(INADDR_ANY);
1271
1272     ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1273                      (const char *)&imr, sizeof(struct ip_mreq));
1274     if (ret < 0) {
1275         perror("setsockopt(IP_ADD_MEMBERSHIP)");
1276         goto fail;
1277     }
1278
1279     /* Force mcast msgs to loopback (eg. several QEMUs in same host */
1280     val = 1;
1281     ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1282                    (const char *)&val, sizeof(val));
1283     if (ret < 0) {
1284         perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
1285         goto fail;
1286     }
1287
1288     socket_set_nonblock(fd);
1289     return fd;
1290 fail:
1291     if (fd >= 0)
1292         closesocket(fd);
1293     return -1;
1294 }
1295
1296 static void net_socket_cleanup(VLANClientState *vc)
1297 {
1298     NetSocketState *s = vc->opaque;
1299     qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1300     close(s->fd);
1301     qemu_free(s);
1302 }
1303
1304 static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
1305                                                 const char *model,
1306                                                 const char *name,
1307                                                 int fd, int is_connected)
1308 {
1309     struct sockaddr_in saddr;
1310     int newfd;
1311     socklen_t saddr_len;
1312     NetSocketState *s;
1313
1314     /* fd passed: multicast: "learn" dgram_dst address from bound address and save it
1315      * Because this may be "shared" socket from a "master" process, datagrams would be recv()
1316      * by ONLY ONE process: we must "clone" this dgram socket --jjo
1317      */
1318
1319     if (is_connected) {
1320         if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
1321             /* must be bound */
1322             if (saddr.sin_addr.s_addr==0) {
1323                 fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, cannot setup multicast dst addr\n",
1324                         fd);
1325                 return NULL;
1326             }
1327             /* clone dgram socket */
1328             newfd = net_socket_mcast_create(&saddr);
1329             if (newfd < 0) {
1330                 /* error already reported by net_socket_mcast_create() */
1331                 close(fd);
1332                 return NULL;
1333             }
1334             /* clone newfd to fd, close newfd */
1335             dup2(newfd, fd);
1336             close(newfd);
1337
1338         } else {
1339             fprintf(stderr, "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
1340                     fd, strerror(errno));
1341             return NULL;
1342         }
1343     }
1344
1345     s = qemu_mallocz(sizeof(NetSocketState));
1346     s->fd = fd;
1347
1348     s->vc = qemu_new_vlan_client(vlan, model, name, net_socket_receive_dgram,
1349                                  NULL, net_socket_cleanup, s);
1350     qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s);
1351
1352     /* mcast: save bound address as dst */
1353     if (is_connected) s->dgram_dst=saddr;
1354
1355     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1356             "socket: fd=%d (%s mcast=%s:%d)",
1357             fd, is_connected? "cloned" : "",
1358             inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1359     return s;
1360 }
1361
1362 static void net_socket_connect(void *opaque)
1363 {
1364     NetSocketState *s = opaque;
1365     qemu_set_fd_handler(s->fd, net_socket_send, NULL, s);
1366 }
1367
1368 static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
1369                                                  const char *model,
1370                                                  const char *name,
1371                                                  int fd, int is_connected)
1372 {
1373     NetSocketState *s;
1374     s = qemu_mallocz(sizeof(NetSocketState));
1375     s->fd = fd;
1376     s->vc = qemu_new_vlan_client(vlan, model, name, net_socket_receive,
1377                                  NULL, net_socket_cleanup, s);
1378     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1379              "socket: fd=%d", fd);
1380     if (is_connected) {
1381         net_socket_connect(s);
1382     } else {
1383         qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
1384     }
1385     return s;
1386 }
1387
1388 static NetSocketState *net_socket_fd_init(VLANState *vlan,
1389                                           const char *model, const char *name,
1390                                           int fd, int is_connected)
1391 {
1392     int so_type=-1, optlen=sizeof(so_type);
1393
1394     if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type,
1395         (socklen_t *)&optlen)< 0) {
1396         fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n", fd);
1397         return NULL;
1398     }
1399     switch(so_type) {
1400     case SOCK_DGRAM:
1401         return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected);
1402     case SOCK_STREAM:
1403         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1404     default:
1405         /* who knows ... this could be a eg. a pty, do warn and continue as stream */
1406         fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
1407         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1408     }
1409     return NULL;
1410 }
1411
1412 static void net_socket_accept(void *opaque)
1413 {
1414     NetSocketListenState *s = opaque;
1415     NetSocketState *s1;
1416     struct sockaddr_in saddr;
1417     socklen_t len;
1418     int fd;
1419
1420     for(;;) {
1421         len = sizeof(saddr);
1422         fd = accept(s->fd, (struct sockaddr *)&saddr, &len);
1423         if (fd < 0 && errno != EINTR) {
1424             return;
1425         } else if (fd >= 0) {
1426             break;
1427         }
1428     }
1429     s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1);
1430     if (!s1) {
1431         closesocket(fd);
1432     } else {
1433         snprintf(s1->vc->info_str, sizeof(s1->vc->info_str),
1434                  "socket: connection from %s:%d",
1435                  inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1436     }
1437 }
1438
1439 static int net_socket_listen_init(VLANState *vlan,
1440                                   const char *model,
1441                                   const char *name,
1442                                   const char *host_str)
1443 {
1444     NetSocketListenState *s;
1445     int fd, val, ret;
1446     struct sockaddr_in saddr;
1447
1448     if (parse_host_port(&saddr, host_str) < 0)
1449         return -1;
1450
1451     s = qemu_mallocz(sizeof(NetSocketListenState));
1452
1453     fd = socket(PF_INET, SOCK_STREAM, 0);
1454     if (fd < 0) {
1455         perror("socket");
1456         return -1;
1457     }
1458     socket_set_nonblock(fd);
1459
1460     /* allow fast reuse */
1461     val = 1;
1462     setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));
1463
1464     ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
1465     if (ret < 0) {
1466         perror("bind");
1467         return -1;
1468     }
1469     ret = listen(fd, 0);
1470     if (ret < 0) {
1471         perror("listen");
1472         return -1;
1473     }
1474     s->vlan = vlan;
1475     s->model = strdup(model);
1476     s->name = name ? strdup(name) : NULL;
1477     s->fd = fd;
1478     qemu_set_fd_handler(fd, net_socket_accept, NULL, s);
1479     return 0;
1480 }
1481
1482 static int net_socket_connect_init(VLANState *vlan,
1483                                    const char *model,
1484                                    const char *name,
1485                                    const char *host_str)
1486 {
1487     NetSocketState *s;
1488     int fd, connected, ret, err;
1489     struct sockaddr_in saddr;
1490
1491     if (parse_host_port(&saddr, host_str) < 0)
1492         return -1;
1493
1494     fd = socket(PF_INET, SOCK_STREAM, 0);
1495     if (fd < 0) {
1496         perror("socket");
1497         return -1;
1498     }
1499     socket_set_nonblock(fd);
1500
1501     connected = 0;
1502     for(;;) {
1503         ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
1504         if (ret < 0) {
1505             err = socket_error();
1506             if (err == EINTR || err == EWOULDBLOCK) {
1507             } else if (err == EINPROGRESS) {
1508                 break;
1509 #ifdef _WIN32
1510             } else if (err == WSAEALREADY) {
1511                 break;
1512 #endif
1513             } else {
1514                 perror("connect");
1515                 closesocket(fd);
1516                 return -1;
1517             }
1518         } else {
1519             connected = 1;
1520             break;
1521         }
1522     }
1523     s = net_socket_fd_init(vlan, model, name, fd, connected);
1524     if (!s)
1525         return -1;
1526     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1527              "socket: connect to %s:%d",
1528              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1529     return 0;
1530 }
1531
1532 static int net_socket_mcast_init(VLANState *vlan,
1533                                  const char *model,
1534                                  const char *name,
1535                                  const char *host_str)
1536 {
1537     NetSocketState *s;
1538     int fd;
1539     struct sockaddr_in saddr;
1540
1541     if (parse_host_port(&saddr, host_str) < 0)
1542         return -1;
1543
1544
1545     fd = net_socket_mcast_create(&saddr);
1546     if (fd < 0)
1547         return -1;
1548
1549     s = net_socket_fd_init(vlan, model, name, fd, 0);
1550     if (!s)
1551         return -1;
1552
1553     s->dgram_dst = saddr;
1554
1555     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1556              "socket: mcast=%s:%d",
1557              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1558     return 0;
1559
1560 }
1561
1562 typedef struct DumpState {
1563     VLANClientState *pcap_vc;
1564     int fd;
1565     int pcap_caplen;
1566 } DumpState;
1567
1568 #define PCAP_MAGIC 0xa1b2c3d4
1569
1570 struct pcap_file_hdr {
1571     uint32_t magic;
1572     uint16_t version_major;
1573     uint16_t version_minor;
1574     int32_t thiszone;
1575     uint32_t sigfigs;
1576     uint32_t snaplen;
1577     uint32_t linktype;
1578 };
1579
1580 struct pcap_sf_pkthdr {
1581     struct {
1582         int32_t tv_sec;
1583         int32_t tv_usec;
1584     } ts;
1585     uint32_t caplen;
1586     uint32_t len;
1587 };
1588
1589 static void dump_receive(void *opaque, const uint8_t *buf, int size)
1590 {
1591     DumpState *s = opaque;
1592     struct pcap_sf_pkthdr hdr;
1593     int64_t ts;
1594     int caplen;
1595
1596     /* Early return in case of previous error. */
1597     if (s->fd < 0) {
1598         return;
1599     }
1600
1601     ts = muldiv64 (qemu_get_clock(vm_clock),1000000, ticks_per_sec);
1602     caplen = size > s->pcap_caplen ? s->pcap_caplen : size;
1603
1604     hdr.ts.tv_sec = ts / 1000000000LL;
1605     hdr.ts.tv_usec = ts % 1000000;
1606     hdr.caplen = caplen;
1607     hdr.len = size;
1608     if (write(s->fd, &hdr, sizeof(hdr)) != sizeof(hdr) ||
1609         write(s->fd, buf, caplen) != caplen) {
1610         qemu_log("-net dump write error - stop dump\n");
1611         close(s->fd);
1612         s->fd = -1;
1613     }
1614 }
1615
1616 static void net_dump_cleanup(VLANClientState *vc)
1617 {
1618     DumpState *s = vc->opaque;
1619
1620     close(s->fd);
1621     qemu_free(s);
1622 }
1623
1624 static int net_dump_init(VLANState *vlan, const char *device,
1625                          const char *name, const char *filename, int len)
1626 {
1627     struct pcap_file_hdr hdr;
1628     DumpState *s;
1629
1630     s = qemu_malloc(sizeof(DumpState));
1631
1632     s->fd = open(filename, O_CREAT | O_WRONLY, 0644);
1633     if (s->fd < 0) {
1634         fprintf(stderr, "-net dump: can't open %s\n", filename);
1635         return -1;
1636     }
1637
1638     s->pcap_caplen = len;
1639
1640     hdr.magic = PCAP_MAGIC;
1641     hdr.version_major = 2;
1642     hdr.version_minor = 4;
1643     hdr.thiszone = 0;
1644     hdr.sigfigs = 0;
1645     hdr.snaplen = s->pcap_caplen;
1646     hdr.linktype = 1;
1647
1648     if (write(s->fd, &hdr, sizeof(hdr)) < sizeof(hdr)) {
1649         perror("-net dump write error");
1650         close(s->fd);
1651         qemu_free(s);
1652         return -1;
1653     }
1654
1655     s->pcap_vc = qemu_new_vlan_client(vlan, device, name, dump_receive, NULL,
1656                                       net_dump_cleanup, s);
1657     snprintf(s->pcap_vc->info_str, sizeof(s->pcap_vc->info_str),
1658              "dump to %s (len=%d)", filename, len);
1659     return 0;
1660 }
1661
1662 /* find or alloc a new VLAN */
1663 VLANState *qemu_find_vlan(int id)
1664 {
1665     VLANState **pvlan, *vlan;
1666     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1667         if (vlan->id == id)
1668             return vlan;
1669     }
1670     vlan = qemu_mallocz(sizeof(VLANState));
1671     vlan->id = id;
1672     vlan->next = NULL;
1673     pvlan = &first_vlan;
1674     while (*pvlan != NULL)
1675         pvlan = &(*pvlan)->next;
1676     *pvlan = vlan;
1677     return vlan;
1678 }
1679
1680 static int nic_get_free_idx(void)
1681 {
1682     int index;
1683
1684     for (index = 0; index < MAX_NICS; index++)
1685         if (!nd_table[index].used)
1686             return index;
1687     return -1;
1688 }
1689
1690 void qemu_check_nic_model(NICInfo *nd, const char *model)
1691 {
1692     const char *models[2];
1693
1694     models[0] = model;
1695     models[1] = NULL;
1696
1697     qemu_check_nic_model_list(nd, models, model);
1698 }
1699
1700 void qemu_check_nic_model_list(NICInfo *nd, const char * const *models,
1701                                const char *default_model)
1702 {
1703     int i, exit_status = 0;
1704
1705     if (!nd->model)
1706         nd->model = strdup(default_model);
1707
1708     if (strcmp(nd->model, "?") != 0) {
1709         for (i = 0 ; models[i]; i++)
1710             if (strcmp(nd->model, models[i]) == 0)
1711                 return;
1712
1713         fprintf(stderr, "qemu: Unsupported NIC model: %s\n", nd->model);
1714         exit_status = 1;
1715     }
1716
1717     fprintf(stderr, "qemu: Supported NIC models: ");
1718     for (i = 0 ; models[i]; i++)
1719         fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
1720
1721     exit(exit_status);
1722 }
1723
1724 int net_client_init(const char *device, const char *p)
1725 {
1726     static const char * const fd_params[] = {
1727         "vlan", "name", "fd", NULL
1728     };
1729     char buf[1024];
1730     int vlan_id, ret;
1731     VLANState *vlan;
1732     char *name = NULL;
1733
1734     vlan_id = 0;
1735     if (get_param_value(buf, sizeof(buf), "vlan", p)) {
1736         vlan_id = strtol(buf, NULL, 0);
1737     }
1738     vlan = qemu_find_vlan(vlan_id);
1739
1740     if (get_param_value(buf, sizeof(buf), "name", p)) {
1741         name = strdup(buf);
1742     }
1743     if (!strcmp(device, "nic")) {
1744         static const char * const nic_params[] = {
1745             "vlan", "name", "macaddr", "model", NULL
1746         };
1747         NICInfo *nd;
1748         uint8_t *macaddr;
1749         int idx = nic_get_free_idx();
1750
1751         if (check_params(buf, sizeof(buf), nic_params, p) < 0) {
1752             fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
1753                     buf, p);
1754             return -1;
1755         }
1756         if (idx == -1 || nb_nics >= MAX_NICS) {
1757             fprintf(stderr, "Too Many NICs\n");
1758             ret = -1;
1759             goto out;
1760         }
1761         nd = &nd_table[idx];
1762         macaddr = nd->macaddr;
1763         macaddr[0] = 0x52;
1764         macaddr[1] = 0x54;
1765         macaddr[2] = 0x00;
1766         macaddr[3] = 0x12;
1767         macaddr[4] = 0x34;
1768         macaddr[5] = 0x56 + idx;
1769
1770         if (get_param_value(buf, sizeof(buf), "macaddr", p)) {
1771             if (parse_macaddr(macaddr, buf) < 0) {
1772                 fprintf(stderr, "invalid syntax for ethernet address\n");
1773                 ret = -1;
1774                 goto out;
1775             }
1776         }
1777         if (get_param_value(buf, sizeof(buf), "model", p)) {
1778             nd->model = strdup(buf);
1779         }
1780         nd->vlan = vlan;
1781         nd->name = name;
1782         nd->used = 1;
1783         name = NULL;
1784         nb_nics++;
1785         vlan->nb_guest_devs++;
1786         ret = idx;
1787     } else
1788     if (!strcmp(device, "none")) {
1789         if (*p != '\0') {
1790             fprintf(stderr, "qemu: 'none' takes no parameters\n");
1791             return -1;
1792         }
1793         /* does nothing. It is needed to signal that no network cards
1794            are wanted */
1795         ret = 0;
1796     } else
1797 #ifdef CONFIG_SLIRP
1798     if (!strcmp(device, "user")) {
1799         static const char * const slirp_params[] = {
1800             "vlan", "name", "hostname", "restrict", "ip", NULL
1801         };
1802         if (check_params(buf, sizeof(buf), slirp_params, p) < 0) {
1803             fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
1804                     buf, p);
1805             return -1;
1806         }
1807         if (get_param_value(buf, sizeof(buf), "hostname", p)) {
1808             pstrcpy(slirp_hostname, sizeof(slirp_hostname), buf);
1809         }
1810         if (get_param_value(buf, sizeof(buf), "restrict", p)) {
1811             slirp_restrict = (buf[0] == 'y') ? 1 : 0;
1812         }
1813         if (get_param_value(buf, sizeof(buf), "ip", p)) {
1814             slirp_ip = strdup(buf);
1815         }
1816         vlan->nb_host_devs++;
1817         ret = net_slirp_init(vlan, device, name);
1818     } else if (!strcmp(device, "channel")) {
1819         long port;
1820         char name[20], *devname;
1821         struct VMChannel *vmc;
1822
1823         port = strtol(p, &devname, 10);
1824         devname++;
1825         if (port < 1 || port > 65535) {
1826             fprintf(stderr, "vmchannel wrong port number\n");
1827             ret = -1;
1828             goto out;
1829         }
1830         vmc = malloc(sizeof(struct VMChannel));
1831         snprintf(name, 20, "vmchannel%ld", port);
1832         vmc->hd = qemu_chr_open(name, devname, NULL);
1833         if (!vmc->hd) {
1834             fprintf(stderr, "qemu: could not open vmchannel device"
1835                     "'%s'\n", devname);
1836             ret = -1;
1837             goto out;
1838         }
1839         vmc->port = port;
1840         slirp_add_exec(3, vmc->hd, 4, port);
1841         qemu_chr_add_handlers(vmc->hd, vmchannel_can_read, vmchannel_read,
1842                 NULL, vmc);
1843         ret = 0;
1844     } else
1845 #endif
1846 #ifdef _WIN32
1847     if (!strcmp(device, "tap")) {
1848         static const char * const tap_params[] = {
1849             "vlan", "name", "ifname", NULL
1850         };
1851         char ifname[64];
1852
1853         if (check_params(buf, sizeof(buf), tap_params, p) < 0) {
1854             fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
1855                     buf, p);
1856             return -1;
1857         }
1858         if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
1859             fprintf(stderr, "tap: no interface name\n");
1860             ret = -1;
1861             goto out;
1862         }
1863         vlan->nb_host_devs++;
1864         ret = tap_win32_init(vlan, device, name, ifname);
1865     } else
1866 #elif defined (_AIX)
1867 #else
1868     if (!strcmp(device, "tap")) {
1869         char ifname[64];
1870         char setup_script[1024], down_script[1024];
1871         int fd;
1872         vlan->nb_host_devs++;
1873         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
1874             if (check_params(buf, sizeof(buf), fd_params, p) < 0) {
1875                 fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
1876                         buf, p);
1877                 return -1;
1878             }
1879             fd = strtol(buf, NULL, 0);
1880             fcntl(fd, F_SETFL, O_NONBLOCK);
1881             net_tap_fd_init(vlan, device, name, fd);
1882             ret = 0;
1883         } else {
1884             static const char * const tap_params[] = {
1885                 "vlan", "name", "ifname", "script", "downscript", NULL
1886             };
1887             if (check_params(buf, sizeof(buf), tap_params, p) < 0) {
1888                 fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
1889                         buf, p);
1890                 return -1;
1891             }
1892             if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
1893                 ifname[0] = '\0';
1894             }
1895             if (get_param_value(setup_script, sizeof(setup_script), "script", p) == 0) {
1896                 pstrcpy(setup_script, sizeof(setup_script), DEFAULT_NETWORK_SCRIPT);
1897             }
1898             if (get_param_value(down_script, sizeof(down_script), "downscript", p) == 0) {
1899                 pstrcpy(down_script, sizeof(down_script), DEFAULT_NETWORK_DOWN_SCRIPT);
1900             }
1901             ret = net_tap_init(vlan, device, name, ifname, setup_script, down_script);
1902         }
1903     } else
1904 #endif
1905     if (!strcmp(device, "socket")) {
1906         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
1907             int fd;
1908             if (check_params(buf, sizeof(buf), fd_params, p) < 0) {
1909                 fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
1910                         buf, p);
1911                 return -1;
1912             }
1913             fd = strtol(buf, NULL, 0);
1914             ret = -1;
1915             if (net_socket_fd_init(vlan, device, name, fd, 1))
1916                 ret = 0;
1917         } else if (get_param_value(buf, sizeof(buf), "listen", p) > 0) {
1918             static const char * const listen_params[] = {
1919                 "vlan", "name", "listen", NULL
1920             };
1921             if (check_params(buf, sizeof(buf), listen_params, p) < 0) {
1922                 fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
1923                         buf, p);
1924                 return -1;
1925             }
1926             ret = net_socket_listen_init(vlan, device, name, buf);
1927         } else if (get_param_value(buf, sizeof(buf), "connect", p) > 0) {
1928             static const char * const connect_params[] = {
1929                 "vlan", "name", "connect", NULL
1930             };
1931             if (check_params(buf, sizeof(buf), connect_params, p) < 0) {
1932                 fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
1933                         buf, p);
1934                 return -1;
1935             }
1936             ret = net_socket_connect_init(vlan, device, name, buf);
1937         } else if (get_param_value(buf, sizeof(buf), "mcast", p) > 0) {
1938             static const char * const mcast_params[] = {
1939                 "vlan", "name", "mcast", NULL
1940             };
1941             if (check_params(buf, sizeof(buf), mcast_params, p) < 0) {
1942                 fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
1943                         buf, p);
1944                 return -1;
1945             }
1946             ret = net_socket_mcast_init(vlan, device, name, buf);
1947         } else {
1948             fprintf(stderr, "Unknown socket options: %s\n", p);
1949             ret = -1;
1950             goto out;
1951         }
1952         vlan->nb_host_devs++;
1953     } else
1954 #ifdef CONFIG_VDE
1955     if (!strcmp(device, "vde")) {
1956         static const char * const vde_params[] = {
1957             "vlan", "name", "sock", "port", "group", "mode", NULL
1958         };
1959         char vde_sock[1024], vde_group[512];
1960         int vde_port, vde_mode;
1961
1962         if (check_params(buf, sizeof(buf), vde_params, p) < 0) {
1963             fprintf(stderr, "qemu: invalid parameter '%s' in '%s'\n",
1964                     buf, p);
1965             return -1;
1966         }
1967         vlan->nb_host_devs++;
1968         if (get_param_value(vde_sock, sizeof(vde_sock), "sock", p) <= 0) {
1969             vde_sock[0] = '\0';
1970         }
1971         if (get_param_value(buf, sizeof(buf), "port", p) > 0) {
1972             vde_port = strtol(buf, NULL, 10);
1973         } else {
1974             vde_port = 0;
1975         }
1976         if (get_param_value(vde_group, sizeof(vde_group), "group", p) <= 0) {
1977             vde_group[0] = '\0';
1978         }
1979         if (get_param_value(buf, sizeof(buf), "mode", p) > 0) {
1980             vde_mode = strtol(buf, NULL, 8);
1981         } else {
1982             vde_mode = 0700;
1983         }
1984         ret = net_vde_init(vlan, device, name, vde_sock, vde_port, vde_group, vde_mode);
1985     } else
1986 #endif
1987     if (!strcmp(device, "dump")) {
1988         int len = 65536;
1989
1990         if (get_param_value(buf, sizeof(buf), "len", p) > 0) {
1991             len = strtol(buf, NULL, 0);
1992         }
1993         if (!get_param_value(buf, sizeof(buf), "file", p)) {
1994             snprintf(buf, sizeof(buf), "qemu-vlan%d.pcap", vlan_id);
1995         }
1996         ret = net_dump_init(vlan, device, name, buf, len);
1997     } else {
1998         fprintf(stderr, "Unknown network device: %s\n", device);
1999         ret = -1;
2000         goto out;
2001     }
2002     if (ret < 0) {
2003         fprintf(stderr, "Could not initialize device '%s'\n", device);
2004     }
2005 out:
2006     if (name)
2007         free(name);
2008     return ret;
2009 }
2010
2011 void net_client_uninit(NICInfo *nd)
2012 {
2013     nd->vlan->nb_guest_devs--;
2014     nb_nics--;
2015     nd->used = 0;
2016     free((void *)nd->model);
2017 }
2018
2019 static int net_host_check_device(const char *device)
2020 {
2021     int i;
2022     const char *valid_param_list[] = { "tap", "socket", "dump"
2023 #ifdef CONFIG_SLIRP
2024                                        ,"user"
2025 #endif
2026 #ifdef CONFIG_VDE
2027                                        ,"vde"
2028 #endif
2029     };
2030     for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) {
2031         if (!strncmp(valid_param_list[i], device,
2032                      strlen(valid_param_list[i])))
2033             return 1;
2034     }
2035
2036     return 0;
2037 }
2038
2039 void net_host_device_add(Monitor *mon, const char *device, const char *opts)
2040 {
2041     if (!net_host_check_device(device)) {
2042         monitor_printf(mon, "invalid host network device %s\n", device);
2043         return;
2044     }
2045     net_client_init(device, opts);
2046 }
2047
2048 void net_host_device_remove(Monitor *mon, int vlan_id, const char *device)
2049 {
2050     VLANState *vlan;
2051     VLANClientState *vc;
2052
2053     vlan = qemu_find_vlan(vlan_id);
2054
2055     for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
2056         if (!strcmp(vc->name, device)) {
2057             break;
2058         }
2059     }
2060
2061     if (!vc) {
2062         monitor_printf(mon, "can't find device %s\n", device);
2063         return;
2064     }
2065     if (!net_host_check_device(vc->model)) {
2066         monitor_printf(mon, "invalid host network device %s\n", device);
2067         return;
2068     }
2069     qemu_del_vlan_client(vc);
2070 }
2071
2072 int net_client_parse(const char *str)
2073 {
2074     const char *p;
2075     char *q;
2076     char device[64];
2077
2078     p = str;
2079     q = device;
2080     while (*p != '\0' && *p != ',') {
2081         if ((q - device) < sizeof(device) - 1)
2082             *q++ = *p;
2083         p++;
2084     }
2085     *q = '\0';
2086     if (*p == ',')
2087         p++;
2088
2089     return net_client_init(device, p);
2090 }
2091
2092 void do_info_network(Monitor *mon)
2093 {
2094     VLANState *vlan;
2095     VLANClientState *vc;
2096
2097     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2098         monitor_printf(mon, "VLAN %d devices:\n", vlan->id);
2099         for(vc = vlan->first_client; vc != NULL; vc = vc->next)
2100             monitor_printf(mon, "  %s: %s\n", vc->name, vc->info_str);
2101     }
2102 }
2103
2104 int do_set_link(Monitor *mon, const char *name, const char *up_or_down)
2105 {
2106     VLANState *vlan;
2107     VLANClientState *vc = NULL;
2108
2109     for (vlan = first_vlan; vlan != NULL; vlan = vlan->next)
2110         for (vc = vlan->first_client; vc != NULL; vc = vc->next)
2111             if (strcmp(vc->name, name) == 0)
2112                 goto done;
2113 done:
2114
2115     if (!vc) {
2116         monitor_printf(mon, "could not find network device '%s'", name);
2117         return 0;
2118     }
2119
2120     if (strcmp(up_or_down, "up") == 0)
2121         vc->link_down = 0;
2122     else if (strcmp(up_or_down, "down") == 0)
2123         vc->link_down = 1;
2124     else
2125         monitor_printf(mon, "invalid link status '%s'; only 'up' or 'down' "
2126                        "valid\n", up_or_down);
2127
2128     if (vc->link_status_changed)
2129         vc->link_status_changed(vc);
2130
2131     return 1;
2132 }
2133
2134 void net_cleanup(void)
2135 {
2136     VLANState *vlan;
2137
2138     /* close network clients */
2139     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2140         VLANClientState *vc = vlan->first_client;
2141
2142         while (vc) {
2143             VLANClientState *next = vc->next;
2144
2145             qemu_del_vlan_client(vc);
2146
2147             vc = next;
2148         }
2149     }
2150 }
2151
2152 void net_client_check(void)
2153 {
2154     VLANState *vlan;
2155
2156     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2157         if (vlan->nb_guest_devs == 0 && vlan->nb_host_devs == 0)
2158             continue;
2159         if (vlan->nb_guest_devs == 0)
2160             fprintf(stderr, "Warning: vlan %d with no nics\n", vlan->id);
2161         if (vlan->nb_host_devs == 0)
2162             fprintf(stderr,
2163                     "Warning: vlan %d is not connected to host network\n",
2164                     vlan->id);
2165     }
2166 }