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                                       NetCanReceive *can_receive,
 336                                       NetReceive *receive,
 337                                       NetReceiveIOV *receive_iov,
 338                                       NetCleanup *cleanup,
 339                                       void *opaque)
 340 {
 341     VLANClientState *vc, **pvc;
 342     vc = qemu_mallocz(sizeof(VLANClientState));
 343     vc->model = strdup(model);
 344     if (name)
 345         vc->name = strdup(name);
 346     else
 347         vc->name = assign_name(vc, model);
 348     vc->can_receive = can_receive;
 349     vc->receive = receive;
 350     vc->receive_iov = receive_iov;
 351     vc->cleanup = cleanup;
 352     vc->opaque = opaque;
 353     vc->vlan = vlan;
 354
 355     vc->next = NULL;
 356     pvc = &vlan->first_client;
 357     while (*pvc != NULL)
 358         pvc = &(*pvc)->next;
 359     *pvc = vc;
 360     return vc;
 361 }
 362
 363 void qemu_del_vlan_client(VLANClientState *vc)
 364 {
 365     VLANClientState **pvc = &vc->vlan->first_client;
 366
 367     while (*pvc != NULL)
 368         if (*pvc == vc) {
 369             *pvc = vc->next;
 370             if (vc->cleanup) {
 371                 vc->cleanup(vc);
 372             }
 373             free(vc->name);
 374             free(vc->model);
 375             qemu_free(vc);
 376             break;
 377         } else
 378             pvc = &(*pvc)->next;
 379 }
 380
 381 VLANClientState *qemu_find_vlan_client(VLANState *vlan, void *opaque)
 382 {
 383     VLANClientState **pvc = &vlan->first_client;
 384
 385     while (*pvc != NULL)
 386         if ((*pvc)->opaque == opaque)
 387             return *pvc;
 388         else
 389             pvc = &(*pvc)->next;
 390
 391     return NULL;
 392 }
 393
 394 int qemu_can_send_packet(VLANClientState *sender)
 395 {
 396     VLANState *vlan = sender->vlan;
 397     VLANClientState *vc;
 398
 399     for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
 400         if (vc == sender) {
 401             continue;
 402         }
 403
 404         /* no can_receive() handler, they can always receive */
 405         if (!vc->can_receive || vc->can_receive(vc)) {
 406             return 1;
 407         }
 408     }
 409     return 0;
 410 }
 411
 412 static int
 413 qemu_deliver_packet(VLANClientState *sender, const uint8_t *buf, int size)
 414 {
 415     VLANClientState *vc;
 416     int ret = -1;
 417
 418     sender->vlan->delivering = 1;
 419
 420     for (vc = sender->vlan->first_client; vc != NULL; vc = vc->next) {
 421         ssize_t len;
 422
 423         if (vc == sender) {
 424             continue;
 425         }
 426
 427         if (vc->link_down) {
 428             ret = size;
 429             continue;
 430         }
 431
 432         len = vc->receive(vc, buf, size);
 433
 434         ret = (ret >= 0) ? ret : len;
 435     }
 436
 437     sender->vlan->delivering = 0;
 438
 439     return ret;
 440 }
 441
 442 void qemu_purge_queued_packets(VLANClientState *vc)
 443 {
 444     VLANPacket **pp = &vc->vlan->send_queue;
 445
 446     while (*pp != NULL) {
 447         VLANPacket *packet = *pp;
 448
 449         if (packet->sender == vc) {
 450             *pp = packet->next;
 451             qemu_free(packet);
 452         } else {
 453             pp = &packet->next;
 454         }
 455     }
 456 }
 457
 458 void qemu_flush_queued_packets(VLANClientState *vc)
 459 {
 460     VLANPacket *packet;
 461
 462     while ((packet = vc->vlan->send_queue) != NULL) {
 463         int ret;
 464
 465         vc->vlan->send_queue = packet->next;
 466
 467         ret = qemu_deliver_packet(packet->sender, packet->data, packet->size);
 468         if (ret == 0 && packet->sent_cb != NULL) {
 469             packet->next = vc->vlan->send_queue;
 470             vc->vlan->send_queue = packet;
 471             break;
 472         }
 473
 474         if (packet->sent_cb)
 475             packet->sent_cb(packet->sender, ret);
 476
 477         qemu_free(packet);
 478     }
 479 }
 480
 481 static void qemu_enqueue_packet(VLANClientState *sender,
 482                                 const uint8_t *buf, int size,
 483                                 NetPacketSent *sent_cb)
 484 {
 485     VLANPacket *packet;
 486
 487     packet = qemu_malloc(sizeof(VLANPacket) + size);
 488     packet->next = sender->vlan->send_queue;
 489     packet->sender = sender;
 490     packet->size = size;
 491     packet->sent_cb = sent_cb;
 492     memcpy(packet->data, buf, size);
 493     sender->vlan->send_queue = packet;
 494 }
 495
 496 ssize_t qemu_send_packet_async(VLANClientState *sender,
 497                                const uint8_t *buf, int size,
 498                                NetPacketSent *sent_cb)
 499 {
 500     int ret;
 501
 502     if (sender->link_down) {
 503         return size;
 504     }
 505
 506 #ifdef DEBUG_NET
 507     printf("vlan %d send:\n", sender->vlan->id);
 508     hex_dump(stdout, buf, size);
 509 #endif
 510
 511     if (sender->vlan->delivering) {
 512         qemu_enqueue_packet(sender, buf, size, NULL);
 513         return size;
 514     }
 515
 516     ret = qemu_deliver_packet(sender, buf, size);
 517     if (ret == 0 && sent_cb != NULL) {
 518         qemu_enqueue_packet(sender, buf, size, sent_cb);
 519         return 0;
 520     }
 521
 522     qemu_flush_queued_packets(sender);
 523
 524     return ret;
 525 }
 526
 527 void qemu_send_packet(VLANClientState *vc, const uint8_t *buf, int size)
 528 {
 529     qemu_send_packet_async(vc, buf, size, NULL);
 530 }
 531
 532 static ssize_t vc_sendv_compat(VLANClientState *vc, const struct iovec *iov,
 533                                int iovcnt)
 534 {
 535     uint8_t buffer[4096];
 536     size_t offset = 0;
 537     int i;
 538
 539     for (i = 0; i < iovcnt; i++) {
 540         size_t len;
 541
 542         len = MIN(sizeof(buffer) - offset, iov[i].iov_len);
 543         memcpy(buffer + offset, iov[i].iov_base, len);
 544         offset += len;
 545     }
 546
 547     return vc->receive(vc, buffer, offset);
 548 }
 549
 550 static ssize_t calc_iov_length(const struct iovec *iov, int iovcnt)
 551 {
 552     size_t offset = 0;
 553     int i;
 554
 555     for (i = 0; i < iovcnt; i++)
 556         offset += iov[i].iov_len;
 557     return offset;
 558 }
 559
 560 static int qemu_deliver_packet_iov(VLANClientState *sender,
 561                                    const struct iovec *iov, int iovcnt)
 562 {
 563     VLANClientState *vc;
 564     int ret = -1;
 565
 566     sender->vlan->delivering = 1;
 567
 568     for (vc = sender->vlan->first_client; vc != NULL; vc = vc->next) {
 569         ssize_t len;
 570
 571         if (vc == sender) {
 572             continue;
 573         }
 574
 575         if (vc->link_down) {
 576             ret = calc_iov_length(iov, iovcnt);
 577             continue;
 578         }
 579
 580         if (vc->receive_iov) {
 581             len = vc->receive_iov(vc, iov, iovcnt);
 582         } else {
 583             len = vc_sendv_compat(vc, iov, iovcnt);
 584         }
 585
 586         ret = (ret >= 0) ? ret : len;
 587     }
 588
 589     sender->vlan->delivering = 0;
 590
 591     return ret;
 592 }
 593
 594 static ssize_t qemu_enqueue_packet_iov(VLANClientState *sender,
 595                                        const struct iovec *iov, int iovcnt,
 596                                        NetPacketSent *sent_cb)
 597 {
 598     VLANPacket *packet;
 599     size_t max_len = 0;
 600     int i;
 601
 602     max_len = calc_iov_length(iov, iovcnt);
 603
 604     packet = qemu_malloc(sizeof(VLANPacket) + max_len);
 605     packet->next = sender->vlan->send_queue;
 606     packet->sender = sender;
 607     packet->sent_cb = sent_cb;
 608     packet->size = 0;
 609
 610     for (i = 0; i < iovcnt; i++) {
 611         size_t len = iov[i].iov_len;
 612
 613         memcpy(packet->data + packet->size, iov[i].iov_base, len);
 614         packet->size += len;
 615     }
 616
 617     sender->vlan->send_queue = packet;
 618
 619     return packet->size;
 620 }
 621
 622 ssize_t qemu_sendv_packet_async(VLANClientState *sender,
 623                                 const struct iovec *iov, int iovcnt,
 624                                 NetPacketSent *sent_cb)
 625 {
 626     int ret;
 627
 628     if (sender->link_down) {
 629         return calc_iov_length(iov, iovcnt);
 630     }
 631
 632     if (sender->vlan->delivering) {
 633         return qemu_enqueue_packet_iov(sender, iov, iovcnt, NULL);
 634     }
 635
 636     ret = qemu_deliver_packet_iov(sender, iov, iovcnt);
 637     if (ret == 0 && sent_cb != NULL) {
 638         qemu_enqueue_packet_iov(sender, iov, iovcnt, sent_cb);
 639         return 0;
 640     }
 641
 642     qemu_flush_queued_packets(sender);
 643
 644     return ret;
 645 }
 646
 647 ssize_t
 648 qemu_sendv_packet(VLANClientState *vc, const struct iovec *iov, int iovcnt)
 649 {
 650     return qemu_sendv_packet_async(vc, iov, iovcnt, NULL);
 651 }
 652
 653 static void config_error(Monitor *mon, const char *fmt, ...)
 654 {
 655     va_list ap;
 656
 657     va_start(ap, fmt);
 658     if (mon) {
 659         monitor_vprintf(mon, fmt, ap);
 660     } else {
 661         fprintf(stderr, "qemu: ");
 662         vfprintf(stderr, fmt, ap);
 663         exit(1);
 664     }
 665     va_end(ap);
 666 }
 667
 668 #if defined(CONFIG_SLIRP)
 669
 670 /* slirp network adapter */
 671
 672 #define SLIRP_CFG_HOSTFWD 1
 673 #define SLIRP_CFG_LEGACY  2
 674
 675 struct slirp_config_str {
 676     struct slirp_config_str *next;
 677     int flags;
 678     char str[1024];
 679     int legacy_format;
 680 };
 681
 682 static int slirp_inited;
 683 static struct slirp_config_str *slirp_configs;
 684 const char *legacy_tftp_prefix;
 685 const char *legacy_bootp_filename;
 686 static VLANClientState *slirp_vc;
 687
 688 static void slirp_hostfwd(Monitor *mon, const char *redir_str);
 689 static void slirp_guestfwd(Monitor *mon, const char *config_str,
 690                            int legacy_format);
 691
 692 #ifndef _WIN32
 693 static const char *legacy_smb_export;
 694
 695 static void slirp_smb(const char *exported_dir, struct in_addr vserver_addr);
 696 #endif
 697
 698 int slirp_can_output(void)
 699 {
 700     return !slirp_vc || qemu_can_send_packet(slirp_vc);
 701 }
 702
 703 void slirp_output(const uint8_t *pkt, int pkt_len)
 704 {
 705 #ifdef DEBUG_SLIRP
 706     printf("slirp output:\n");
 707     hex_dump(stdout, pkt, pkt_len);
 708 #endif
 709     if (!slirp_vc)
 710         return;
 711     qemu_send_packet(slirp_vc, pkt, pkt_len);
 712 }
 713
 714 int slirp_is_inited(void)
 715 {
 716     return slirp_inited;
 717 }
 718
 719 static ssize_t slirp_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
 720 {
 721 #ifdef DEBUG_SLIRP
 722     printf("slirp input:\n");
 723     hex_dump(stdout, buf, size);
 724 #endif
 725     slirp_input(buf, size);
 726     return size;
 727 }
 728
 729 static int slirp_in_use;
 730
 731 static void net_slirp_cleanup(VLANClientState *vc)
 732 {
 733     slirp_in_use = 0;
 734 }
 735
 736 static int net_slirp_init(Monitor *mon, VLANState *vlan, const char *model,
 737                           const char *name, int restricted,
 738                           const char *vnetwork, const char *vhost,
 739                           const char *vhostname, const char *tftp_export,
 740                           const char *bootfile, const char *vdhcp_start,
 741                           const char *vnameserver, const char *smb_export,
 742                           const char *vsmbserver)
 743 {
 744     if (slirp_in_use) {
 745         /* slirp only supports a single instance so far */
 746         return -1;
 747     }
 748     if (!slirp_inited) {
 749         /* default settings according to historic slirp */
 750         struct in_addr net  = { .s_addr = htonl(0x0a000000) }; /* 10.0.0.0 */
 751         struct in_addr mask = { .s_addr = htonl(0xff000000) }; /* 255.0.0.0 */
 752         struct in_addr host = { .s_addr = htonl(0x0a000202) }; /* 10.0.2.2 */
 753         struct in_addr dhcp = { .s_addr = htonl(0x0a00020f) }; /* 10.0.2.15 */
 754         struct in_addr dns  = { .s_addr = htonl(0x0a000203) }; /* 10.0.2.3 */
 755 #ifndef _WIN32
 756         struct in_addr smbsrv = { .s_addr = 0 };
 757 #endif
 758         char buf[20];
 759         uint32_t addr;
 760         int shift;
 761         char *end;
 762
 763         if (!tftp_export) {
 764             tftp_export = legacy_tftp_prefix;
 765         }
 766         if (!bootfile) {
 767             bootfile = legacy_bootp_filename;
 768         }
 769
 770         if (vnetwork) {
 771             if (get_str_sep(buf, sizeof(buf), &vnetwork, '/') < 0) {
 772                 if (!inet_aton(vnetwork, &net)) {
 773                     return -1;
 774                 }
 775                 addr = ntohl(net.s_addr);
 776                 if (!(addr & 0x80000000)) {
 777                     mask.s_addr = htonl(0xff000000); /* class A */
 778                 } else if ((addr & 0xfff00000) == 0xac100000) {
 779                     mask.s_addr = htonl(0xfff00000); /* priv. 172.16.0.0/12 */
 780                 } else if ((addr & 0xc0000000) == 0x80000000) {
 781                     mask.s_addr = htonl(0xffff0000); /* class B */
 782                 } else if ((addr & 0xffff0000) == 0xc0a80000) {
 783                     mask.s_addr = htonl(0xffff0000); /* priv. 192.168.0.0/16 */
 784                 } else if ((addr & 0xffff0000) == 0xc6120000) {
 785                     mask.s_addr = htonl(0xfffe0000); /* tests 198.18.0.0/15 */
 786                 } else if ((addr & 0xe0000000) == 0xe0000000) {
 787                     mask.s_addr = htonl(0xffffff00); /* class C */
 788                 } else {
 789                     mask.s_addr = htonl(0xfffffff0); /* multicast/reserved */
 790                 }
 791             } else {
 792                 if (!inet_aton(buf, &net)) {
 793                     return -1;
 794                 }
 795                 shift = strtol(vnetwork, &end, 10);
 796                 if (*end != '\0') {
 797                     if (!inet_aton(vnetwork, &mask)) {
 798                         return -1;
 799                     }
 800                 } else if (shift < 4 || shift > 32) {
 801                     return -1;
 802                 } else {
 803                     mask.s_addr = htonl(0xffffffff << (32 - shift));
 804                 }
 805             }
 806             net.s_addr &= mask.s_addr;
 807             host.s_addr = net.s_addr | (htonl(0x0202) & ~mask.s_addr);
 808             dhcp.s_addr = net.s_addr | (htonl(0x020f) & ~mask.s_addr);
 809             dns.s_addr  = net.s_addr | (htonl(0x0203) & ~mask.s_addr);
 810         }
 811
 812         if (vhost && !inet_aton(vhost, &host)) {
 813             return -1;
 814         }
 815         if ((host.s_addr & mask.s_addr) != net.s_addr) {
 816             return -1;
 817         }
 818
 819         if (vdhcp_start && !inet_aton(vdhcp_start, &dhcp)) {
 820             return -1;
 821         }
 822         if ((dhcp.s_addr & mask.s_addr) != net.s_addr ||
 823             dhcp.s_addr == host.s_addr || dhcp.s_addr == dns.s_addr) {
 824             return -1;
 825         }
 826
 827         if (vnameserver && !inet_aton(vnameserver, &dns)) {
 828             return -1;
 829         }
 830         if ((dns.s_addr & mask.s_addr) != net.s_addr ||
 831             dns.s_addr == host.s_addr) {
 832             return -1;
 833         }
 834
 835 #ifndef _WIN32
 836         if (vsmbserver && !inet_aton(vsmbserver, &smbsrv)) {
 837             return -1;
 838         }
 839 #endif
 840
 841         slirp_init(restricted, net, mask, host, vhostname, tftp_export,
 842                    bootfile, dhcp, dns);
 843         slirp_inited = 1;
 844
 845         while (slirp_configs) {
 846             struct slirp_config_str *config = slirp_configs;
 847
 848             if (config->flags & SLIRP_CFG_HOSTFWD) {
 849                 slirp_hostfwd(mon, config->str);
 850             } else {
 851                 slirp_guestfwd(mon, config->str,
 852                                config->flags & SLIRP_CFG_LEGACY);
 853             }
 854             slirp_configs = config->next;
 855             qemu_free(config);
 856         }
 857 #ifndef _WIN32
 858         if (!smb_export) {
 859             smb_export = legacy_smb_export;
 860         }
 861         if (smb_export) {
 862             slirp_smb(smb_export, smbsrv);
 863         }
 864 #endif
 865     }
 866
 867     slirp_vc = qemu_new_vlan_client(vlan, model, name, NULL, slirp_receive,
 868                                     NULL, net_slirp_cleanup, NULL);
 869     slirp_vc->info_str[0] = '\0';
 870     slirp_in_use = 1;
 871     return 0;
 872 }
 873
 874 void net_slirp_hostfwd_remove(Monitor *mon, const char *port_str)
 875 {
 876     int host_port;
 877     char buf[256] = "";
 878     const char *p = port_str;
 879     int is_udp = 0;
 880     int n;
 881
 882     if (!slirp_inited) {
 883         monitor_printf(mon, "user mode network stack not in use\n");
 884         return;
 885     }
 886
 887     if (!port_str || !port_str[0])
 888         goto fail_syntax;
 889
 890     get_str_sep(buf, sizeof(buf), &p, ':');
 891
 892     if (!strcmp(buf, "tcp") || buf[0] == '\0') {
 893         is_udp = 0;
 894     } else if (!strcmp(buf, "udp")) {
 895         is_udp = 1;
 896     } else {
 897         goto fail_syntax;
 898     }
 899
 900     host_port = atoi(p);
 901
 902     n = slirp_remove_hostfwd(is_udp, host_port);
 903
 904     monitor_printf(mon, "removed %d host forwarding rules for %s port %d\n",
 905                    n, is_udp ? "udp" : "tcp", host_port);
 906     return;
 907
 908  fail_syntax:
 909     monitor_printf(mon, "invalid format\n");
 910 }
 911
 912 static void slirp_hostfwd(Monitor *mon, const char *redir_str)
 913 {
 914     struct in_addr guest_addr = { .s_addr = 0 };
 915     int host_port, guest_port;
 916     const char *p;
 917     char buf[256];
 918     int is_udp;
 919     char *end;
 920
 921     p = redir_str;
 922     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 923         goto fail_syntax;
 924     }
 925     if (!strcmp(buf, "tcp") || buf[0] == '\0') {
 926         is_udp = 0;
 927     } else if (!strcmp(buf, "udp")) {
 928         is_udp = 1;
 929     } else {
 930         goto fail_syntax;
 931     }
 932
 933     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 934         goto fail_syntax;
 935     }
 936     host_port = strtol(buf, &end, 0);
 937     if (*end != '\0' || host_port < 1 || host_port > 65535) {
 938         goto fail_syntax;
 939     }
 940
 941     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 942         goto fail_syntax;
 943     }
 944     if (buf[0] != '\0' && !inet_aton(buf, &guest_addr)) {
 945         goto fail_syntax;
 946     }
 947
 948     guest_port = strtol(p, &end, 0);
 949     if (*end != '\0' || guest_port < 1 || guest_port > 65535) {
 950         goto fail_syntax;
 951     }
 952
 953     if (slirp_add_hostfwd(is_udp, host_port, guest_addr, guest_port) < 0) {
 954         config_error(mon, "could not set up host forwarding rule '%s'\n",
 955                      redir_str);
 956     }
 957     return;
 958
 959  fail_syntax:
 960     config_error(mon, "invalid host forwarding rule '%s'\n", redir_str);
 961 }
 962
 963 void net_slirp_hostfwd_add(Monitor *mon, const char *redir_str)
 964 {
 965     if (!slirp_inited) {
 966         monitor_printf(mon, "user mode network stack not in use\n");
 967         return;
 968     }
 969
 970     slirp_hostfwd(mon, redir_str);
 971 }
 972
 973 void net_slirp_redir(const char *redir_str)
 974 {
 975     struct slirp_config_str *config;
 976
 977     if (!slirp_inited) {
 978         config = qemu_malloc(sizeof(*config));
 979         pstrcpy(config->str, sizeof(config->str), redir_str);
 980         config->flags = SLIRP_CFG_HOSTFWD;
 981         config->next = slirp_configs;
 982         slirp_configs = config;
 983         return;
 984     }
 985
 986     slirp_hostfwd(NULL, redir_str);
 987 }
 988
 989 #ifndef _WIN32
 990
 991 static char smb_dir[1024];
 992
 993 static void erase_dir(char *dir_name)
 994 {
 995     DIR *d;
 996     struct dirent *de;
 997     char filename[1024];
 998
 999     /* erase all the files in the directory */
1000     if ((d = opendir(dir_name)) != NULL) {
1001         for(;;) {
1002             de = readdir(d);
1003             if (!de)
1004                 break;
1005             if (strcmp(de->d_name, ".") != 0 &&
1006                 strcmp(de->d_name, "..") != 0) {
1007                 snprintf(filename, sizeof(filename), "%s/%s",
1008                          smb_dir, de->d_name);
1009                 if (unlink(filename) != 0)  /* is it a directory? */
1010                     erase_dir(filename);
1011             }
1012         }
1013         closedir(d);
1014         rmdir(dir_name);
1015     }
1016 }
1017
1018 /* automatic user mode samba server configuration */
1019 static void smb_exit(void)
1020 {
1021     erase_dir(smb_dir);
1022 }
1023
1024 static void slirp_smb(const char *exported_dir, struct in_addr vserver_addr)
1025 {
1026     char smb_conf[1024];
1027     char smb_cmdline[1024];
1028     FILE *f;
1029
1030     /* XXX: better tmp dir construction */
1031     snprintf(smb_dir, sizeof(smb_dir), "/tmp/qemu-smb.%ld", (long)getpid());
1032     if (mkdir(smb_dir, 0700) < 0) {
1033         fprintf(stderr, "qemu: could not create samba server dir '%s'\n", smb_dir);
1034         exit(1);
1035     }
1036     snprintf(smb_conf, sizeof(smb_conf), "%s/%s", smb_dir, "smb.conf");
1037
1038     f = fopen(smb_conf, "w");
1039     if (!f) {
1040         fprintf(stderr, "qemu: could not create samba server configuration file '%s'\n", smb_conf);
1041         exit(1);
1042     }
1043     fprintf(f,
1044             "[global]\n"
1045             "private dir=%s\n"
1046             "smb ports=0\n"
1047             "socket address=127.0.0.1\n"
1048             "pid directory=%s\n"
1049             "lock directory=%s\n"
1050             "log file=%s/log.smbd\n"
1051             "smb passwd file=%s/smbpasswd\n"
1052             "security = share\n"
1053             "[qemu]\n"
1054             "path=%s\n"
1055             "read only=no\n"
1056             "guest ok=yes\n",
1057             smb_dir,
1058             smb_dir,
1059             smb_dir,
1060             smb_dir,
1061             smb_dir,
1062             exported_dir
1063             );
1064     fclose(f);
1065     atexit(smb_exit);
1066
1067     snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -s %s",
1068              SMBD_COMMAND, smb_conf);
1069
1070     if (slirp_add_exec(0, smb_cmdline, vserver_addr, 139) < 0) {
1071         fprintf(stderr, "conflicting/invalid smbserver address\n");
1072         exit(1);
1073     }
1074 }
1075
1076 /* automatic user mode samba server configuration (legacy interface) */
1077 void net_slirp_smb(const char *exported_dir)
1078 {
1079     struct in_addr vserver_addr = { .s_addr = 0 };
1080
1081     if (legacy_smb_export) {
1082         fprintf(stderr, "-smb given twice\n");
1083         exit(1);
1084     }
1085     legacy_smb_export = exported_dir;
1086     if (slirp_inited) {
1087         slirp_smb(exported_dir, vserver_addr);
1088     }
1089 }
1090
1091 #endif /* !defined(_WIN32) */
1092
1093 void do_info_slirp(Monitor *mon)
1094 {
1095     slirp_stats();
1096 }
1097
1098 struct GuestFwd {
1099     CharDriverState *hd;
1100     struct in_addr server;
1101     int port;
1102 };
1103
1104 static int guestfwd_can_read(void *opaque)
1105 {
1106     struct GuestFwd *fwd = opaque;
1107     return slirp_socket_can_recv(fwd->server, fwd->port);
1108 }
1109
1110 static void guestfwd_read(void *opaque, const uint8_t *buf, int size)
1111 {
1112     struct GuestFwd *fwd = opaque;
1113     slirp_socket_recv(fwd->server, fwd->port, buf, size);
1114 }
1115
1116 static void slirp_guestfwd(Monitor *mon, const char *config_str,
1117                            int legacy_format)
1118 {
1119     struct in_addr server = { .s_addr = 0 };
1120     struct GuestFwd *fwd;
1121     const char *p;
1122     char buf[128];
1123     char *end;
1124     int port;
1125
1126     p = config_str;
1127     if (legacy_format) {
1128         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1129             goto fail_syntax;
1130         }
1131     } else {
1132         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1133             goto fail_syntax;
1134         }
1135         if (strcmp(buf, "tcp") && buf[0] != '\0') {
1136             goto fail_syntax;
1137         }
1138         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1139             goto fail_syntax;
1140         }
1141         if (buf[0] != '\0' && !inet_aton(buf, &server)) {
1142             goto fail_syntax;
1143         }
1144         if (get_str_sep(buf, sizeof(buf), &p, '-') < 0) {
1145             goto fail_syntax;
1146         }
1147     }
1148     port = strtol(buf, &end, 10);
1149     if (*end != '\0' || port < 1 || port > 65535) {
1150         goto fail_syntax;
1151     }
1152
1153     fwd = qemu_malloc(sizeof(struct GuestFwd));
1154     snprintf(buf, sizeof(buf), "guestfwd.tcp:%d", port);
1155     fwd->hd = qemu_chr_open(buf, p, NULL);
1156     if (!fwd->hd) {
1157         config_error(mon, "could not open guest forwarding device '%s'\n",
1158                      buf);
1159         qemu_free(fwd);
1160         return;
1161     }
1162     fwd->server = server;
1163     fwd->port = port;
1164
1165     if (slirp_add_exec(3, fwd->hd, server, port) < 0) {
1166         config_error(mon, "conflicting/invalid host:port in guest forwarding "
1167                      "rule '%s'\n", config_str);
1168         qemu_free(fwd);
1169         return;
1170     }
1171     qemu_chr_add_handlers(fwd->hd, guestfwd_can_read, guestfwd_read,
1172                           NULL, fwd);
1173     return;
1174
1175  fail_syntax:
1176     config_error(mon, "invalid guest forwarding rule '%s'\n", config_str);
1177 }
1178
1179 #endif /* CONFIG_SLIRP */
1180
1181 #if !defined(_WIN32)
1182
1183 typedef struct TAPState {
1184     VLANClientState *vc;
1185     int fd;
1186     char down_script[1024];
1187     char down_script_arg[128];
1188     uint8_t buf[4096];
1189     unsigned int read_poll : 1;
1190     unsigned int write_poll : 1;
1191 } TAPState;
1192
1193 static int launch_script(const char *setup_script, const char *ifname, int fd);
1194
1195 static int tap_can_send(void *opaque);
1196 static void tap_send(void *opaque);
1197 static void tap_writable(void *opaque);
1198
1199 static void tap_update_fd_handler(TAPState *s)
1200 {
1201     qemu_set_fd_handler2(s->fd,
1202                          s->read_poll  ? tap_can_send : NULL,
1203                          s->read_poll  ? tap_send     : NULL,
1204                          s->write_poll ? tap_writable : NULL,
1205                          s);
1206 }
1207
1208 static void tap_read_poll(TAPState *s, int enable)
1209 {
1210     s->read_poll = !!enable;
1211     tap_update_fd_handler(s);
1212 }
1213
1214 static void tap_write_poll(TAPState *s, int enable)
1215 {
1216     s->write_poll = !!enable;
1217     tap_update_fd_handler(s);
1218 }
1219
1220 static void tap_writable(void *opaque)
1221 {
1222     TAPState *s = opaque;
1223
1224     tap_write_poll(s, 0);
1225
1226     qemu_flush_queued_packets(s->vc);
1227 }
1228
1229 static ssize_t tap_receive_iov(VLANClientState *vc, const struct iovec *iov,
1230                                int iovcnt)
1231 {
1232     TAPState *s = vc->opaque;
1233     ssize_t len;
1234
1235     do {
1236         len = writev(s->fd, iov, iovcnt);
1237     } while (len == -1 && errno == EINTR);
1238
1239     if (len == -1 && errno == EAGAIN) {
1240         tap_write_poll(s, 1);
1241         return 0;
1242     }
1243
1244     return len;
1245 }
1246
1247 static ssize_t tap_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1248 {
1249     TAPState *s = vc->opaque;
1250     ssize_t len;
1251
1252     do {
1253         len = write(s->fd, buf, size);
1254     } while (len == -1 && (errno == EINTR || errno == EAGAIN));
1255
1256     return len;
1257 }
1258
1259 static int tap_can_send(void *opaque)
1260 {
1261     TAPState *s = opaque;
1262
1263     return qemu_can_send_packet(s->vc);
1264 }
1265
1266 #ifdef __sun__
1267 static ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
1268 {
1269     struct strbuf sbuf;
1270     int f = 0;
1271
1272     sbuf.maxlen = maxlen;
1273     sbuf.buf = (char *)buf;
1274
1275     return getmsg(tapfd, NULL, &sbuf, &f) >= 0 ? sbuf.len : -1;
1276 }
1277 #else
1278 static ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
1279 {
1280     return read(tapfd, buf, maxlen);
1281 }
1282 #endif
1283
1284 static void tap_send_completed(VLANClientState *vc, ssize_t len)
1285 {
1286     TAPState *s = vc->opaque;
1287     tap_read_poll(s, 1);
1288 }
1289
1290 static void tap_send(void *opaque)
1291 {
1292     TAPState *s = opaque;
1293     int size;
1294
1295     do {
1296         size = tap_read_packet(s->fd, s->buf, sizeof(s->buf));
1297         if (size <= 0) {
1298             break;
1299         }
1300
1301         size = qemu_send_packet_async(s->vc, s->buf, size, tap_send_completed);
1302         if (size == 0) {
1303             tap_read_poll(s, 0);
1304         }
1305     } while (size > 0);
1306 }
1307
1308 static void tap_set_sndbuf(TAPState *s, int sndbuf, Monitor *mon)
1309 {
1310 #ifdef TUNSETSNDBUF
1311     if (ioctl(s->fd, TUNSETSNDBUF, &sndbuf) == -1) {
1312         config_error(mon, "TUNSETSNDBUF ioctl failed: %s\n",
1313                      strerror(errno));
1314     }
1315 #else
1316     config_error(mon, "No '-net tap,sndbuf=<nbytes>' support available\n");
1317 #endif
1318 }
1319
1320 static void tap_cleanup(VLANClientState *vc)
1321 {
1322     TAPState *s = vc->opaque;
1323
1324     qemu_purge_queued_packets(vc);
1325
1326     if (s->down_script[0])
1327         launch_script(s->down_script, s->down_script_arg, s->fd);
1328
1329     tap_read_poll(s, 0);
1330     tap_write_poll(s, 0);
1331     close(s->fd);
1332     qemu_free(s);
1333 }
1334
1335 /* fd support */
1336
1337 static TAPState *net_tap_fd_init(VLANState *vlan,
1338                                  const char *model,
1339                                  const char *name,
1340                                  int fd)
1341 {
1342     TAPState *s;
1343
1344     s = qemu_mallocz(sizeof(TAPState));
1345     s->fd = fd;
1346     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, tap_receive,
1347                                  tap_receive_iov, tap_cleanup, s);
1348     tap_read_poll(s, 1);
1349     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "fd=%d", fd);
1350     return s;
1351 }
1352
1353 #if defined (HOST_BSD) || defined (__FreeBSD_kernel__)
1354 static int tap_open(char *ifname, int ifname_size)
1355 {
1356     int fd;
1357     char *dev;
1358     struct stat s;
1359
1360     TFR(fd = open("/dev/tap", O_RDWR));
1361     if (fd < 0) {
1362         fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n");
1363         return -1;
1364     }
1365
1366     fstat(fd, &s);
1367     dev = devname(s.st_rdev, S_IFCHR);
1368     pstrcpy(ifname, ifname_size, dev);
1369
1370     fcntl(fd, F_SETFL, O_NONBLOCK);
1371     return fd;
1372 }
1373 #elif defined(__sun__)
1374 #define TUNNEWPPA       (('T'<<16) | 0x0001)
1375 /*
1376  * Allocate TAP device, returns opened fd.
1377  * Stores dev name in the first arg(must be large enough).
1378  */
1379 static int tap_alloc(char *dev, size_t dev_size)
1380 {
1381     int tap_fd, if_fd, ppa = -1;
1382     static int ip_fd = 0;
1383     char *ptr;
1384
1385     static int arp_fd = 0;
1386     int ip_muxid, arp_muxid;
1387     struct strioctl  strioc_if, strioc_ppa;
1388     int link_type = I_PLINK;;
1389     struct lifreq ifr;
1390     char actual_name[32] = "";
1391
1392     memset(&ifr, 0x0, sizeof(ifr));
1393
1394     if( *dev ){
1395        ptr = dev;
1396        while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
1397        ppa = atoi(ptr);
1398     }
1399
1400     /* Check if IP device was opened */
1401     if( ip_fd )
1402        close(ip_fd);
1403
1404     TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
1405     if (ip_fd < 0) {
1406        syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)");
1407        return -1;
1408     }
1409
1410     TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
1411     if (tap_fd < 0) {
1412        syslog(LOG_ERR, "Can't open /dev/tap");
1413        return -1;
1414     }
1415
1416     /* Assign a new PPA and get its unit number. */
1417     strioc_ppa.ic_cmd = TUNNEWPPA;
1418     strioc_ppa.ic_timout = 0;
1419     strioc_ppa.ic_len = sizeof(ppa);
1420     strioc_ppa.ic_dp = (char *)&ppa;
1421     if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
1422        syslog (LOG_ERR, "Can't assign new interface");
1423
1424     TFR(if_fd = open("/dev/tap", O_RDWR, 0));
1425     if (if_fd < 0) {
1426        syslog(LOG_ERR, "Can't open /dev/tap (2)");
1427        return -1;
1428     }
1429     if(ioctl(if_fd, I_PUSH, "ip") < 0){
1430        syslog(LOG_ERR, "Can't push IP module");
1431        return -1;
1432     }
1433
1434     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
1435         syslog(LOG_ERR, "Can't get flags\n");
1436
1437     snprintf (actual_name, 32, "tap%d", ppa);
1438     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
1439
1440     ifr.lifr_ppa = ppa;
1441     /* Assign ppa according to the unit number returned by tun device */
1442
1443     if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
1444         syslog (LOG_ERR, "Can't set PPA %d", ppa);
1445     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
1446         syslog (LOG_ERR, "Can't get flags\n");
1447     /* Push arp module to if_fd */
1448     if (ioctl (if_fd, I_PUSH, "arp") < 0)
1449         syslog (LOG_ERR, "Can't push ARP module (2)");
1450
1451     /* Push arp module to ip_fd */
1452     if (ioctl (ip_fd, I_POP, NULL) < 0)
1453         syslog (LOG_ERR, "I_POP failed\n");
1454     if (ioctl (ip_fd, I_PUSH, "arp") < 0)
1455         syslog (LOG_ERR, "Can't push ARP module (3)\n");
1456     /* Open arp_fd */
1457     TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
1458     if (arp_fd < 0)
1459        syslog (LOG_ERR, "Can't open %s\n", "/dev/tap");
1460
1461     /* Set ifname to arp */
1462     strioc_if.ic_cmd = SIOCSLIFNAME;
1463     strioc_if.ic_timout = 0;
1464     strioc_if.ic_len = sizeof(ifr);
1465     strioc_if.ic_dp = (char *)&ifr;
1466     if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
1467         syslog (LOG_ERR, "Can't set ifname to arp\n");
1468     }
1469
1470     if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
1471        syslog(LOG_ERR, "Can't link TAP device to IP");
1472        return -1;
1473     }
1474
1475     if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
1476         syslog (LOG_ERR, "Can't link TAP device to ARP");
1477
1478     close (if_fd);
1479
1480     memset(&ifr, 0x0, sizeof(ifr));
1481     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
1482     ifr.lifr_ip_muxid  = ip_muxid;
1483     ifr.lifr_arp_muxid = arp_muxid;
1484
1485     if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
1486     {
1487       ioctl (ip_fd, I_PUNLINK , arp_muxid);
1488       ioctl (ip_fd, I_PUNLINK, ip_muxid);
1489       syslog (LOG_ERR, "Can't set multiplexor id");
1490     }
1491
1492     snprintf(dev, dev_size, "tap%d", ppa);
1493     return tap_fd;
1494 }
1495
1496 static int tap_open(char *ifname, int ifname_size)
1497 {
1498     char  dev[10]="";
1499     int fd;
1500     if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){
1501        fprintf(stderr, "Cannot allocate TAP device\n");
1502        return -1;
1503     }
1504     pstrcpy(ifname, ifname_size, dev);
1505     fcntl(fd, F_SETFL, O_NONBLOCK);
1506     return fd;
1507 }
1508 #elif defined (_AIX)
1509 static int tap_open(char *ifname, int ifname_size)
1510 {
1511     fprintf (stderr, "no tap on AIX\n");
1512     return -1;
1513 }
1514 #else
1515 static int tap_open(char *ifname, int ifname_size)
1516 {
1517     struct ifreq ifr;
1518     int fd, ret;
1519
1520     TFR(fd = open("/dev/net/tun", O_RDWR));
1521     if (fd < 0) {
1522         fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n");
1523         return -1;
1524     }
1525     memset(&ifr, 0, sizeof(ifr));
1526     ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
1527     if (ifname[0] != '\0')
1528         pstrcpy(ifr.ifr_name, IFNAMSIZ, ifname);
1529     else
1530         pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d");
1531     ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
1532     if (ret != 0) {
1533         fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n");
1534         close(fd);
1535         return -1;
1536     }
1537     pstrcpy(ifname, ifname_size, ifr.ifr_name);
1538     fcntl(fd, F_SETFL, O_NONBLOCK);
1539     return fd;
1540 }
1541 #endif
1542
1543 static int launch_script(const char *setup_script, const char *ifname, int fd)
1544 {
1545     sigset_t oldmask, mask;
1546     int pid, status;
1547     char *args[3];
1548     char **parg;
1549
1550     sigemptyset(&mask);
1551     sigaddset(&mask, SIGCHLD);
1552     sigprocmask(SIG_BLOCK, &mask, &oldmask);
1553
1554     /* try to launch network script */
1555     pid = fork();
1556     if (pid == 0) {
1557         int open_max = sysconf(_SC_OPEN_MAX), i;
1558
1559         for (i = 0; i < open_max; i++) {
1560             if (i != STDIN_FILENO &&
1561                 i != STDOUT_FILENO &&
1562                 i != STDERR_FILENO &&
1563                 i != fd) {
1564                 close(i);
1565             }
1566         }
1567         parg = args;
1568         *parg++ = (char *)setup_script;
1569         *parg++ = (char *)ifname;
1570         *parg++ = NULL;
1571         execv(setup_script, args);
1572         _exit(1);
1573     } else if (pid > 0) {
1574         while (waitpid(pid, &status, 0) != pid) {
1575             /* loop */
1576         }
1577         sigprocmask(SIG_SETMASK, &oldmask, NULL);
1578
1579         if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
1580             return 0;
1581         }
1582     }
1583     fprintf(stderr, "%s: could not launch network script\n", setup_script);
1584     return -1;
1585 }
1586
1587 static TAPState *net_tap_init(VLANState *vlan, const char *model,
1588                               const char *name, const char *ifname1,
1589                               const char *setup_script, const char *down_script)
1590 {
1591     TAPState *s;
1592     int fd;
1593     char ifname[128];
1594
1595     if (ifname1 != NULL)
1596         pstrcpy(ifname, sizeof(ifname), ifname1);
1597     else
1598         ifname[0] = '\0';
1599     TFR(fd = tap_open(ifname, sizeof(ifname)));
1600     if (fd < 0)
1601         return NULL;
1602
1603     if (!setup_script || !strcmp(setup_script, "no"))
1604         setup_script = "";
1605     if (setup_script[0] != '\0' &&
1606         launch_script(setup_script, ifname, fd)) {
1607         return NULL;
1608     }
1609     s = net_tap_fd_init(vlan, model, name, fd);
1610     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1611              "ifname=%s,script=%s,downscript=%s",
1612              ifname, setup_script, down_script);
1613     if (down_script && strcmp(down_script, "no")) {
1614         snprintf(s->down_script, sizeof(s->down_script), "%s", down_script);
1615         snprintf(s->down_script_arg, sizeof(s->down_script_arg), "%s", ifname);
1616     }
1617     return s;
1618 }
1619
1620 #endif /* !_WIN32 */
1621
1622 #if defined(CONFIG_VDE)
1623 typedef struct VDEState {
1624     VLANClientState *vc;
1625     VDECONN *vde;
1626 } VDEState;
1627
1628 static void vde_to_qemu(void *opaque)
1629 {
1630     VDEState *s = opaque;
1631     uint8_t buf[4096];
1632     int size;
1633
1634     size = vde_recv(s->vde, (char *)buf, sizeof(buf), 0);
1635     if (size > 0) {
1636         qemu_send_packet(s->vc, buf, size);
1637     }
1638 }
1639
1640 static ssize_t vde_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1641 {
1642     VDEState *s = vc->opaque;
1643     ssize_t ret;
1644
1645     do {
1646       ret = vde_send(s->vde, (const char *)buf, size, 0);
1647     } while (ret < 0 && errno == EINTR);
1648
1649     return ret;
1650 }
1651
1652 static void vde_cleanup(VLANClientState *vc)
1653 {
1654     VDEState *s = vc->opaque;
1655     qemu_set_fd_handler(vde_datafd(s->vde), NULL, NULL, NULL);
1656     vde_close(s->vde);
1657     qemu_free(s);
1658 }
1659
1660 static int net_vde_init(VLANState *vlan, const char *model,
1661                         const char *name, const char *sock,
1662                         int port, const char *group, int mode)
1663 {
1664     VDEState *s;
1665     char *init_group = strlen(group) ? (char *)group : NULL;
1666     char *init_sock = strlen(sock) ? (char *)sock : NULL;
1667
1668     struct vde_open_args args = {
1669         .port = port,
1670         .group = init_group,
1671         .mode = mode,
1672     };
1673
1674     s = qemu_mallocz(sizeof(VDEState));
1675     s->vde = vde_open(init_sock, (char *)"QEMU", &args);
1676     if (!s->vde){
1677         free(s);
1678         return -1;
1679     }
1680     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, vde_receive,
1681                                  NULL, vde_cleanup, s);
1682     qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
1683     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "sock=%s,fd=%d",
1684              sock, vde_datafd(s->vde));
1685     return 0;
1686 }
1687 #endif
1688
1689 /* network connection */
1690 typedef struct NetSocketState {
1691     VLANClientState *vc;
1692     int fd;
1693     int state; /* 0 = getting length, 1 = getting data */
1694     unsigned int index;
1695     unsigned int packet_len;
1696     uint8_t buf[4096];
1697     struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
1698 } NetSocketState;
1699
1700 typedef struct NetSocketListenState {
1701     VLANState *vlan;
1702     char *model;
1703     char *name;
1704     int fd;
1705 } NetSocketListenState;
1706
1707 /* XXX: we consider we can send the whole packet without blocking */
1708 static ssize_t net_socket_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1709 {
1710     NetSocketState *s = vc->opaque;
1711     uint32_t len;
1712     len = htonl(size);
1713
1714     send_all(s->fd, (const uint8_t *)&len, sizeof(len));
1715     return send_all(s->fd, buf, size);
1716 }
1717
1718 static ssize_t net_socket_receive_dgram(VLANClientState *vc, const uint8_t *buf, size_t size)
1719 {
1720     NetSocketState *s = vc->opaque;
1721
1722     return sendto(s->fd, (const void *)buf, size, 0,
1723                   (struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst));
1724 }
1725
1726 static void net_socket_send(void *opaque)
1727 {
1728     NetSocketState *s = opaque;
1729     int size, err;
1730     unsigned l;
1731     uint8_t buf1[4096];
1732     const uint8_t *buf;
1733
1734     size = recv(s->fd, (void *)buf1, sizeof(buf1), 0);
1735     if (size < 0) {
1736         err = socket_error();
1737         if (err != EWOULDBLOCK)
1738             goto eoc;
1739     } else if (size == 0) {
1740         /* end of connection */
1741     eoc:
1742         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1743         closesocket(s->fd);
1744         return;
1745     }
1746     buf = buf1;
1747     while (size > 0) {
1748         /* reassemble a packet from the network */
1749         switch(s->state) {
1750         case 0:
1751             l = 4 - s->index;
1752             if (l > size)
1753                 l = size;
1754             memcpy(s->buf + s->index, buf, l);
1755             buf += l;
1756             size -= l;
1757             s->index += l;
1758             if (s->index == 4) {
1759                 /* got length */
1760                 s->packet_len = ntohl(*(uint32_t *)s->buf);
1761                 s->index = 0;
1762                 s->state = 1;
1763             }
1764             break;
1765         case 1:
1766             l = s->packet_len - s->index;
1767             if (l > size)
1768                 l = size;
1769             if (s->index + l <= sizeof(s->buf)) {
1770                 memcpy(s->buf + s->index, buf, l);
1771             } else {
1772                 fprintf(stderr, "serious error: oversized packet received,"
1773                     "connection terminated.\n");
1774                 s->state = 0;
1775                 goto eoc;
1776             }
1777
1778             s->index += l;
1779             buf += l;
1780             size -= l;
1781             if (s->index >= s->packet_len) {
1782                 qemu_send_packet(s->vc, s->buf, s->packet_len);
1783                 s->index = 0;
1784                 s->state = 0;
1785             }
1786             break;
1787         }
1788     }
1789 }
1790
1791 static void net_socket_send_dgram(void *opaque)
1792 {
1793     NetSocketState *s = opaque;
1794     int size;
1795
1796     size = recv(s->fd, (void *)s->buf, sizeof(s->buf), 0);
1797     if (size < 0)
1798         return;
1799     if (size == 0) {
1800         /* end of connection */
1801         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1802         return;
1803     }
1804     qemu_send_packet(s->vc, s->buf, size);
1805 }
1806
1807 static int net_socket_mcast_create(struct sockaddr_in *mcastaddr)
1808 {
1809     struct ip_mreq imr;
1810     int fd;
1811     int val, ret;
1812     if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
1813         fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n",
1814                 inet_ntoa(mcastaddr->sin_addr),
1815                 (int)ntohl(mcastaddr->sin_addr.s_addr));
1816         return -1;
1817
1818     }
1819     fd = socket(PF_INET, SOCK_DGRAM, 0);
1820     if (fd < 0) {
1821         perror("socket(PF_INET, SOCK_DGRAM)");
1822         return -1;
1823     }
1824
1825     val = 1;
1826     ret=setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
1827                    (const char *)&val, sizeof(val));
1828     if (ret < 0) {
1829         perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
1830         goto fail;
1831     }
1832
1833     ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
1834     if (ret < 0) {
1835         perror("bind");
1836         goto fail;
1837     }
1838
1839     /* Add host to multicast group */
1840     imr.imr_multiaddr = mcastaddr->sin_addr;
1841     imr.imr_interface.s_addr = htonl(INADDR_ANY);
1842
1843     ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1844                      (const char *)&imr, sizeof(struct ip_mreq));
1845     if (ret < 0) {
1846         perror("setsockopt(IP_ADD_MEMBERSHIP)");
1847         goto fail;
1848     }
1849
1850     /* Force mcast msgs to loopback (eg. several QEMUs in same host */
1851     val = 1;
1852     ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1853                    (const char *)&val, sizeof(val));
1854     if (ret < 0) {
1855         perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
1856         goto fail;
1857     }
1858
1859     socket_set_nonblock(fd);
1860     return fd;
1861 fail:
1862     if (fd >= 0)
1863         closesocket(fd);
1864     return -1;
1865 }
1866
1867 static void net_socket_cleanup(VLANClientState *vc)
1868 {
1869     NetSocketState *s = vc->opaque;
1870     qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1871     close(s->fd);
1872     qemu_free(s);
1873 }
1874
1875 static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
1876                                                 const char *model,
1877                                                 const char *name,
1878                                                 int fd, int is_connected)
1879 {
1880     struct sockaddr_in saddr;
1881     int newfd;
1882     socklen_t saddr_len;
1883     NetSocketState *s;
1884
1885     /* fd passed: multicast: "learn" dgram_dst address from bound address and save it
1886      * Because this may be "shared" socket from a "master" process, datagrams would be recv()
1887      * by ONLY ONE process: we must "clone" this dgram socket --jjo
1888      */
1889
1890     if (is_connected) {
1891         if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
1892             /* must be bound */
1893             if (saddr.sin_addr.s_addr==0) {
1894                 fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, cannot setup multicast dst addr\n",
1895                         fd);
1896                 return NULL;
1897             }
1898             /* clone dgram socket */
1899             newfd = net_socket_mcast_create(&saddr);
1900             if (newfd < 0) {
1901                 /* error already reported by net_socket_mcast_create() */
1902                 close(fd);
1903                 return NULL;
1904             }
1905             /* clone newfd to fd, close newfd */
1906             dup2(newfd, fd);
1907             close(newfd);
1908
1909         } else {
1910             fprintf(stderr, "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
1911                     fd, strerror(errno));
1912             return NULL;
1913         }
1914     }
1915
1916     s = qemu_mallocz(sizeof(NetSocketState));
1917     s->fd = fd;
1918
1919     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, net_socket_receive_dgram,
1920                                  NULL, net_socket_cleanup, s);
1921     qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s);
1922
1923     /* mcast: save bound address as dst */
1924     if (is_connected) s->dgram_dst=saddr;
1925
1926     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1927             "socket: fd=%d (%s mcast=%s:%d)",
1928             fd, is_connected? "cloned" : "",
1929             inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1930     return s;
1931 }
1932
1933 static void net_socket_connect(void *opaque)
1934 {
1935     NetSocketState *s = opaque;
1936     qemu_set_fd_handler(s->fd, net_socket_send, NULL, s);
1937 }
1938
1939 static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
1940                                                  const char *model,
1941                                                  const char *name,
1942                                                  int fd, int is_connected)
1943 {
1944     NetSocketState *s;
1945     s = qemu_mallocz(sizeof(NetSocketState));
1946     s->fd = fd;
1947     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, net_socket_receive,
1948                                  NULL, net_socket_cleanup, s);
1949     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1950              "socket: fd=%d", fd);
1951     if (is_connected) {
1952         net_socket_connect(s);
1953     } else {
1954         qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
1955     }
1956     return s;
1957 }
1958
1959 static NetSocketState *net_socket_fd_init(VLANState *vlan,
1960                                           const char *model, const char *name,
1961                                           int fd, int is_connected)
1962 {
1963     int so_type=-1, optlen=sizeof(so_type);
1964
1965     if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type,
1966         (socklen_t *)&optlen)< 0) {
1967         fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n", fd);
1968         return NULL;
1969     }
1970     switch(so_type) {
1971     case SOCK_DGRAM:
1972         return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected);
1973     case SOCK_STREAM:
1974         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1975     default:
1976         /* who knows ... this could be a eg. a pty, do warn and continue as stream */
1977         fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
1978         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1979     }
1980     return NULL;
1981 }
1982
1983 static void net_socket_accept(void *opaque)
1984 {
1985     NetSocketListenState *s = opaque;
1986     NetSocketState *s1;
1987     struct sockaddr_in saddr;
1988     socklen_t len;
1989     int fd;
1990
1991     for(;;) {
1992         len = sizeof(saddr);
1993         fd = accept(s->fd, (struct sockaddr *)&saddr, &len);
1994         if (fd < 0 && errno != EINTR) {
1995             return;
1996         } else if (fd >= 0) {
1997             break;
1998         }
1999     }
2000     s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1);
2001     if (!s1) {
2002         closesocket(fd);
2003     } else {
2004         snprintf(s1->vc->info_str, sizeof(s1->vc->info_str),
2005                  "socket: connection from %s:%d",
2006                  inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2007     }
2008 }
2009
2010 static int net_socket_listen_init(VLANState *vlan,
2011                                   const char *model,
2012                                   const char *name,
2013                                   const char *host_str)
2014 {
2015     NetSocketListenState *s;
2016     int fd, val, ret;
2017     struct sockaddr_in saddr;
2018
2019     if (parse_host_port(&saddr, host_str) < 0)
2020         return -1;
2021
2022     s = qemu_mallocz(sizeof(NetSocketListenState));
2023
2024     fd = socket(PF_INET, SOCK_STREAM, 0);
2025     if (fd < 0) {
2026         perror("socket");
2027         return -1;
2028     }
2029     socket_set_nonblock(fd);
2030
2031     /* allow fast reuse */
2032     val = 1;
2033     setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));
2034
2035     ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
2036     if (ret < 0) {
2037         perror("bind");
2038         return -1;
2039     }
2040     ret = listen(fd, 0);
2041     if (ret < 0) {
2042         perror("listen");
2043         return -1;
2044     }
2045     s->vlan = vlan;
2046     s->model = strdup(model);
2047     s->name = name ? strdup(name) : NULL;
2048     s->fd = fd;
2049     qemu_set_fd_handler(fd, net_socket_accept, NULL, s);
2050     return 0;
2051 }
2052
2053 static int net_socket_connect_init(VLANState *vlan,
2054                                    const char *model,
2055                                    const char *name,
2056                                    const char *host_str)
2057 {
2058     NetSocketState *s;
2059     int fd, connected, ret, err;
2060     struct sockaddr_in saddr;
2061
2062     if (parse_host_port(&saddr, host_str) < 0)
2063         return -1;
2064
2065     fd = socket(PF_INET, SOCK_STREAM, 0);
2066     if (fd < 0) {
2067         perror("socket");
2068         return -1;
2069     }
2070     socket_set_nonblock(fd);
2071
2072     connected = 0;
2073     for(;;) {
2074         ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
2075         if (ret < 0) {
2076             err = socket_error();
2077             if (err == EINTR || err == EWOULDBLOCK) {
2078             } else if (err == EINPROGRESS) {
2079                 break;
2080 #ifdef _WIN32
2081             } else if (err == WSAEALREADY) {
2082                 break;
2083 #endif
2084             } else {
2085                 perror("connect");
2086                 closesocket(fd);
2087                 return -1;
2088             }
2089         } else {
2090             connected = 1;
2091             break;
2092         }
2093     }
2094     s = net_socket_fd_init(vlan, model, name, fd, connected);
2095     if (!s)
2096         return -1;
2097     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2098              "socket: connect to %s:%d",
2099              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2100     return 0;
2101 }
2102
2103 static int net_socket_mcast_init(VLANState *vlan,
2104                                  const char *model,
2105                                  const char *name,
2106                                  const char *host_str)
2107 {
2108     NetSocketState *s;
2109     int fd;
2110     struct sockaddr_in saddr;
2111
2112     if (parse_host_port(&saddr, host_str) < 0)
2113         return -1;
2114
2115
2116     fd = net_socket_mcast_create(&saddr);
2117     if (fd < 0)
2118         return -1;
2119
2120     s = net_socket_fd_init(vlan, model, name, fd, 0);
2121     if (!s)
2122         return -1;
2123
2124     s->dgram_dst = saddr;
2125
2126     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2127              "socket: mcast=%s:%d",
2128              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2129     return 0;
2130
2131 }
2132
2133 typedef struct DumpState {
2134     VLANClientState *pcap_vc;
2135     int fd;
2136     int pcap_caplen;
2137 } DumpState;
2138
2139 #define PCAP_MAGIC 0xa1b2c3d4
2140
2141 struct pcap_file_hdr {
2142     uint32_t magic;
2143     uint16_t version_major;
2144     uint16_t version_minor;
2145     int32_t thiszone;
2146     uint32_t sigfigs;
2147     uint32_t snaplen;
2148     uint32_t linktype;
2149 };
2150
2151 struct pcap_sf_pkthdr {
2152     struct {
2153         int32_t tv_sec;
2154         int32_t tv_usec;
2155     } ts;
2156     uint32_t caplen;
2157     uint32_t len;
2158 };
2159
2160 static ssize_t dump_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
2161 {
2162     DumpState *s = vc->opaque;
2163     struct pcap_sf_pkthdr hdr;
2164     int64_t ts;
2165     int caplen;
2166
2167     /* Early return in case of previous error. */
2168     if (s->fd < 0) {
2169         return size;
2170     }
2171
2172     ts = muldiv64(qemu_get_clock(vm_clock), 1000000, ticks_per_sec);
2173     caplen = size > s->pcap_caplen ? s->pcap_caplen : size;
2174
2175     hdr.ts.tv_sec = ts / 1000000;
2176     hdr.ts.tv_usec = ts % 1000000;
2177     hdr.caplen = caplen;
2178     hdr.len = size;
2179     if (write(s->fd, &hdr, sizeof(hdr)) != sizeof(hdr) ||
2180         write(s->fd, buf, caplen) != caplen) {
2181         qemu_log("-net dump write error - stop dump\n");
2182         close(s->fd);
2183         s->fd = -1;
2184     }
2185
2186     return size;
2187 }
2188
2189 static void net_dump_cleanup(VLANClientState *vc)
2190 {
2191     DumpState *s = vc->opaque;
2192
2193     close(s->fd);
2194     qemu_free(s);
2195 }
2196
2197 static int net_dump_init(Monitor *mon, VLANState *vlan, const char *device,
2198                          const char *name, const char *filename, int len)
2199 {
2200     struct pcap_file_hdr hdr;
2201     DumpState *s;
2202
2203     s = qemu_malloc(sizeof(DumpState));
2204
2205     s->fd = open(filename, O_CREAT | O_WRONLY | O_BINARY, 0644);
2206     if (s->fd < 0) {
2207         config_error(mon, "-net dump: can't open %s\n", filename);
2208         return -1;
2209     }
2210
2211     s->pcap_caplen = len;
2212
2213     hdr.magic = PCAP_MAGIC;
2214     hdr.version_major = 2;
2215     hdr.version_minor = 4;
2216     hdr.thiszone = 0;
2217     hdr.sigfigs = 0;
2218     hdr.snaplen = s->pcap_caplen;
2219     hdr.linktype = 1;
2220
2221     if (write(s->fd, &hdr, sizeof(hdr)) < sizeof(hdr)) {
2222         config_error(mon, "-net dump write error: %s\n", strerror(errno));
2223         close(s->fd);
2224         qemu_free(s);
2225         return -1;
2226     }
2227
2228     s->pcap_vc = qemu_new_vlan_client(vlan, device, name, NULL, dump_receive, NULL,
2229                                       net_dump_cleanup, s);
2230     snprintf(s->pcap_vc->info_str, sizeof(s->pcap_vc->info_str),
2231              "dump to %s (len=%d)", filename, len);
2232     return 0;
2233 }
2234
2235 /* find or alloc a new VLAN */
2236 VLANState *qemu_find_vlan(int id)
2237 {
2238     VLANState **pvlan, *vlan;
2239     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2240         if (vlan->id == id)
2241             return vlan;
2242     }
2243     vlan = qemu_mallocz(sizeof(VLANState));
2244     vlan->id = id;
2245     vlan->next = NULL;
2246     pvlan = &first_vlan;
2247     while (*pvlan != NULL)
2248         pvlan = &(*pvlan)->next;
2249     *pvlan = vlan;
2250     return vlan;
2251 }
2252
2253 static int nic_get_free_idx(void)
2254 {
2255     int index;
2256
2257     for (index = 0; index < MAX_NICS; index++)
2258         if (!nd_table[index].used)
2259             return index;
2260     return -1;
2261 }
2262
2263 void qemu_check_nic_model(NICInfo *nd, const char *model)
2264 {
2265     const char *models[2];
2266
2267     models[0] = model;
2268     models[1] = NULL;
2269
2270     qemu_check_nic_model_list(nd, models, model);
2271 }
2272
2273 void qemu_check_nic_model_list(NICInfo *nd, const char * const *models,
2274                                const char *default_model)
2275 {
2276     int i, exit_status = 0;
2277
2278     if (!nd->model)
2279         nd->model = strdup(default_model);
2280
2281     if (strcmp(nd->model, "?") != 0) {
2282         for (i = 0 ; models[i]; i++)
2283             if (strcmp(nd->model, models[i]) == 0)
2284                 return;
2285
2286         fprintf(stderr, "qemu: Unsupported NIC model: %s\n", nd->model);
2287         exit_status = 1;
2288     }
2289
2290     fprintf(stderr, "qemu: Supported NIC models: ");
2291     for (i = 0 ; models[i]; i++)
2292         fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
2293
2294     exit(exit_status);
2295 }
2296
2297 int net_client_init(Monitor *mon, const char *device, const char *p)
2298 {
2299     char buf[1024];
2300     int vlan_id, ret;
2301     VLANState *vlan;
2302     char *name = NULL;
2303
2304     vlan_id = 0;
2305     if (get_param_value(buf, sizeof(buf), "vlan", p)) {
2306         vlan_id = strtol(buf, NULL, 0);
2307     }
2308     vlan = qemu_find_vlan(vlan_id);
2309
2310     if (get_param_value(buf, sizeof(buf), "name", p)) {
2311         name = qemu_strdup(buf);
2312     }
2313     if (!strcmp(device, "nic")) {
2314         static const char * const nic_params[] = {
2315             "vlan", "name", "macaddr", "model", "addr", "vectors", NULL
2316         };
2317         NICInfo *nd;
2318         uint8_t *macaddr;
2319         int idx = nic_get_free_idx();
2320
2321         if (check_params(buf, sizeof(buf), nic_params, p) < 0) {
2322             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2323             ret = -1;
2324             goto out;
2325         }
2326         if (idx == -1 || nb_nics >= MAX_NICS) {
2327             config_error(mon, "Too Many NICs\n");
2328             ret = -1;
2329             goto out;
2330         }
2331         nd = &nd_table[idx];
2332         macaddr = nd->macaddr;
2333         macaddr[0] = 0x52;
2334         macaddr[1] = 0x54;
2335         macaddr[2] = 0x00;
2336         macaddr[3] = 0x12;
2337         macaddr[4] = 0x34;
2338         macaddr[5] = 0x56 + idx;
2339
2340         if (get_param_value(buf, sizeof(buf), "macaddr", p)) {
2341             if (parse_macaddr(macaddr, buf) < 0) {
2342                 config_error(mon, "invalid syntax for ethernet address\n");
2343                 ret = -1;
2344                 goto out;
2345             }
2346         }
2347         if (get_param_value(buf, sizeof(buf), "model", p)) {
2348             nd->model = strdup(buf);
2349         }
2350         if (get_param_value(buf, sizeof(buf), "addr", p)) {
2351             nd->devaddr = strdup(buf);
2352         }
2353         nd->nvectors = NIC_NVECTORS_UNSPECIFIED;
2354         if (get_param_value(buf, sizeof(buf), "vectors", p)) {
2355             char *endptr;
2356             long vectors = strtol(buf, &endptr, 0);
2357             if (*endptr) {
2358                 config_error(mon, "invalid syntax for # of vectors\n");
2359                 ret = -1;
2360                 goto out;
2361             }
2362             if (vectors < 0 || vectors > 0x7ffffff) {
2363                 config_error(mon, "invalid # of vectors\n");
2364                 ret = -1;
2365                 goto out;
2366             }
2367             nd->nvectors = vectors;
2368         }
2369         nd->vlan = vlan;
2370         nd->name = name;
2371         nd->used = 1;
2372         name = NULL;
2373         nb_nics++;
2374         vlan->nb_guest_devs++;
2375         ret = idx;
2376     } else
2377     if (!strcmp(device, "none")) {
2378         if (*p != '\0') {
2379             config_error(mon, "'none' takes no parameters\n");
2380             ret = -1;
2381             goto out;
2382         }
2383         /* does nothing. It is needed to signal that no network cards
2384            are wanted */
2385         ret = 0;
2386     } else
2387 #ifdef CONFIG_SLIRP
2388     if (!strcmp(device, "user")) {
2389         static const char * const slirp_params[] = {
2390             "vlan", "name", "hostname", "restrict", "ip", "net", "host",
2391             "tftp", "bootfile", "dhcpstart", "dns", "smb", "smbserver",
2392             "hostfwd", "guestfwd", NULL
2393         };
2394         struct slirp_config_str *config;
2395         int restricted = 0;
2396         char *vnet = NULL;
2397         char *vhost = NULL;
2398         char *vhostname = NULL;
2399         char *tftp_export = NULL;
2400         char *bootfile = NULL;
2401         char *vdhcp_start = NULL;
2402         char *vnamesrv = NULL;
2403         char *smb_export = NULL;
2404         char *vsmbsrv = NULL;
2405         const char *q;
2406
2407         if (check_params(buf, sizeof(buf), slirp_params, p) < 0) {
2408             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2409             ret = -1;
2410             goto out;
2411         }
2412         if (get_param_value(buf, sizeof(buf), "ip", p)) {
2413             /* emulate legacy parameter */
2414             vnet = qemu_malloc(strlen(buf) + strlen("/24") + 1);
2415             strcpy(vnet, buf);
2416             strcat(vnet, "/24");
2417         }
2418         if (get_param_value(buf, sizeof(buf), "net", p)) {
2419             vnet = qemu_strdup(buf);
2420         }
2421         if (get_param_value(buf, sizeof(buf), "host", p)) {
2422             vhost = qemu_strdup(buf);
2423         }
2424         if (get_param_value(buf, sizeof(buf), "hostname", p)) {
2425             vhostname = qemu_strdup(buf);
2426         }
2427         if (get_param_value(buf, sizeof(buf), "restrict", p)) {
2428             restricted = (buf[0] == 'y') ? 1 : 0;
2429         }
2430         if (get_param_value(buf, sizeof(buf), "dhcpstart", p)) {
2431             vdhcp_start = qemu_strdup(buf);
2432         }
2433         if (get_param_value(buf, sizeof(buf), "dns", p)) {
2434             vnamesrv = qemu_strdup(buf);
2435         }
2436         if (get_param_value(buf, sizeof(buf), "tftp", p)) {
2437             tftp_export = qemu_strdup(buf);
2438         }
2439         if (get_param_value(buf, sizeof(buf), "bootfile", p)) {
2440             bootfile = qemu_strdup(buf);
2441         }
2442         if (get_param_value(buf, sizeof(buf), "smb", p)) {
2443             smb_export = qemu_strdup(buf);
2444             if (get_param_value(buf, sizeof(buf), "smbserver", p)) {
2445                 vsmbsrv = qemu_strdup(buf);
2446             }
2447         }
2448         q = p;
2449         while (1) {
2450             config = qemu_malloc(sizeof(*config));
2451             if (!get_next_param_value(config->str, sizeof(config->str),
2452                                       "hostfwd", &q)) {
2453                 break;
2454             }
2455             config->flags = SLIRP_CFG_HOSTFWD;
2456             config->next = slirp_configs;
2457             slirp_configs = config;
2458             config = NULL;
2459         }
2460         q = p;
2461         while (1) {
2462             config = qemu_malloc(sizeof(*config));
2463             if (!get_next_param_value(config->str, sizeof(config->str),
2464                                       "guestfwd", &q)) {
2465                 break;
2466             }
2467             config->flags = 0;
2468             config->next = slirp_configs;
2469             slirp_configs = config;
2470             config = NULL;
2471         }
2472         qemu_free(config);
2473         vlan->nb_host_devs++;
2474         ret = net_slirp_init(mon, vlan, device, name, restricted, vnet, vhost,
2475                              vhostname, tftp_export, bootfile, vdhcp_start,
2476                              vnamesrv, smb_export, vsmbsrv);
2477         qemu_free(vnet);
2478         qemu_free(vhost);
2479         qemu_free(vhostname);
2480         qemu_free(tftp_export);
2481         qemu_free(bootfile);
2482         qemu_free(vdhcp_start);
2483         qemu_free(vnamesrv);
2484         qemu_free(smb_export);
2485         qemu_free(vsmbsrv);
2486     } else if (!strcmp(device, "channel")) {
2487         if (!slirp_inited) {
2488             struct slirp_config_str *config;
2489
2490             config = qemu_malloc(sizeof(*config));
2491             pstrcpy(config->str, sizeof(config->str), p);
2492             config->flags = SLIRP_CFG_LEGACY;
2493             config->next = slirp_configs;
2494             slirp_configs = config;
2495         } else {
2496             slirp_guestfwd(mon, p, 1);
2497         }
2498         ret = 0;
2499     } else
2500 #endif
2501 #ifdef _WIN32
2502     if (!strcmp(device, "tap")) {
2503         static const char * const tap_params[] = {
2504             "vlan", "name", "ifname", NULL
2505         };
2506         char ifname[64];
2507
2508         if (check_params(buf, sizeof(buf), tap_params, p) < 0) {
2509             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2510             ret = -1;
2511             goto out;
2512         }
2513         if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
2514             config_error(mon, "tap: no interface name\n");
2515             ret = -1;
2516             goto out;
2517         }
2518         vlan->nb_host_devs++;
2519         ret = tap_win32_init(vlan, device, name, ifname);
2520     } else
2521 #elif defined (_AIX)
2522 #else
2523     if (!strcmp(device, "tap")) {
2524         char ifname[64], chkbuf[64];
2525         char setup_script[1024], down_script[1024];
2526         TAPState *s;
2527         int fd;
2528         vlan->nb_host_devs++;
2529         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
2530             static const char * const fd_params[] = {
2531                 "vlan", "name", "fd", "sndbuf", NULL
2532             };
2533             if (check_params(chkbuf, sizeof(chkbuf), fd_params, p) < 0) {
2534                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2535                 ret = -1;
2536                 goto out;
2537             }
2538             fd = strtol(buf, NULL, 0);
2539             fcntl(fd, F_SETFL, O_NONBLOCK);
2540             s = net_tap_fd_init(vlan, device, name, fd);
2541         } else {
2542             static const char * const tap_params[] = {
2543                 "vlan", "name", "ifname", "script", "downscript", "sndbuf", NULL
2544             };
2545             if (check_params(chkbuf, sizeof(chkbuf), tap_params, p) < 0) {
2546                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2547                 ret = -1;
2548                 goto out;
2549             }
2550             if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
2551                 ifname[0] = '\0';
2552             }
2553             if (get_param_value(setup_script, sizeof(setup_script), "script", p) == 0) {
2554                 pstrcpy(setup_script, sizeof(setup_script), DEFAULT_NETWORK_SCRIPT);
2555             }
2556             if (get_param_value(down_script, sizeof(down_script), "downscript", p) == 0) {
2557                 pstrcpy(down_script, sizeof(down_script), DEFAULT_NETWORK_DOWN_SCRIPT);
2558             }
2559             s = net_tap_init(vlan, device, name, ifname, setup_script, down_script);
2560         }
2561         if (s != NULL) {
2562             if (get_param_value(buf, sizeof(buf), "sndbuf", p)) {
2563                 tap_set_sndbuf(s, atoi(buf), mon);
2564             }
2565             ret = 0;
2566         } else {
2567             ret = -1;
2568         }
2569     } else
2570 #endif
2571     if (!strcmp(device, "socket")) {
2572         char chkbuf[64];
2573         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
2574             static const char * const fd_params[] = {
2575                 "vlan", "name", "fd", NULL
2576             };
2577             int fd;
2578             if (check_params(chkbuf, sizeof(chkbuf), fd_params, p) < 0) {
2579                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2580                 ret = -1;
2581                 goto out;
2582             }
2583             fd = strtol(buf, NULL, 0);
2584             ret = -1;
2585             if (net_socket_fd_init(vlan, device, name, fd, 1))
2586                 ret = 0;
2587         } else if (get_param_value(buf, sizeof(buf), "listen", p) > 0) {
2588             static const char * const listen_params[] = {
2589                 "vlan", "name", "listen", NULL
2590             };
2591             if (check_params(chkbuf, sizeof(chkbuf), listen_params, p) < 0) {
2592                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2593                 ret = -1;
2594                 goto out;
2595             }
2596             ret = net_socket_listen_init(vlan, device, name, buf);
2597         } else if (get_param_value(buf, sizeof(buf), "connect", p) > 0) {
2598             static const char * const connect_params[] = {
2599                 "vlan", "name", "connect", NULL
2600             };
2601             if (check_params(chkbuf, sizeof(chkbuf), connect_params, p) < 0) {
2602                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2603                 ret = -1;
2604                 goto out;
2605             }
2606             ret = net_socket_connect_init(vlan, device, name, buf);
2607         } else if (get_param_value(buf, sizeof(buf), "mcast", p) > 0) {
2608             static const char * const mcast_params[] = {
2609                 "vlan", "name", "mcast", NULL
2610             };
2611             if (check_params(chkbuf, sizeof(chkbuf), mcast_params, p) < 0) {
2612                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2613                 ret = -1;
2614                 goto out;
2615             }
2616             ret = net_socket_mcast_init(vlan, device, name, buf);
2617         } else {
2618             config_error(mon, "Unknown socket options: %s\n", p);
2619             ret = -1;
2620             goto out;
2621         }
2622         vlan->nb_host_devs++;
2623     } else
2624 #ifdef CONFIG_VDE
2625     if (!strcmp(device, "vde")) {
2626         static const char * const vde_params[] = {
2627             "vlan", "name", "sock", "port", "group", "mode", NULL
2628         };
2629         char vde_sock[1024], vde_group[512];
2630         int vde_port, vde_mode;
2631
2632         if (check_params(buf, sizeof(buf), vde_params, p) < 0) {
2633             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2634             ret = -1;
2635             goto out;
2636         }
2637         vlan->nb_host_devs++;
2638         if (get_param_value(vde_sock, sizeof(vde_sock), "sock", p) <= 0) {
2639             vde_sock[0] = '\0';
2640         }
2641         if (get_param_value(buf, sizeof(buf), "port", p) > 0) {
2642             vde_port = strtol(buf, NULL, 10);
2643         } else {
2644             vde_port = 0;
2645         }
2646         if (get_param_value(vde_group, sizeof(vde_group), "group", p) <= 0) {
2647             vde_group[0] = '\0';
2648         }
2649         if (get_param_value(buf, sizeof(buf), "mode", p) > 0) {
2650             vde_mode = strtol(buf, NULL, 8);
2651         } else {
2652             vde_mode = 0700;
2653         }
2654         ret = net_vde_init(vlan, device, name, vde_sock, vde_port, vde_group, vde_mode);
2655     } else
2656 #endif
2657     if (!strcmp(device, "dump")) {
2658         int len = 65536;
2659
2660         if (get_param_value(buf, sizeof(buf), "len", p) > 0) {
2661             len = strtol(buf, NULL, 0);
2662         }
2663         if (!get_param_value(buf, sizeof(buf), "file", p)) {
2664             snprintf(buf, sizeof(buf), "qemu-vlan%d.pcap", vlan_id);
2665         }
2666         ret = net_dump_init(mon, vlan, device, name, buf, len);
2667     } else {
2668         config_error(mon, "Unknown network device: %s\n", device);
2669         ret = -1;
2670         goto out;
2671     }
2672     if (ret < 0) {
2673         config_error(mon, "Could not initialize device '%s'\n", device);
2674     }
2675 out:
2676     qemu_free(name);
2677     return ret;
2678 }
2679
2680 void net_client_uninit(NICInfo *nd)
2681 {
2682     nd->vlan->nb_guest_devs--;
2683     nb_nics--;
2684     nd->used = 0;
2685     free((void *)nd->model);
2686 }
2687
2688 static int net_host_check_device(const char *device)
2689 {
2690     int i;
2691     const char *valid_param_list[] = { "tap", "socket", "dump"
2692 #ifdef CONFIG_SLIRP
2693                                        ,"user"
2694 #endif
2695 #ifdef CONFIG_VDE
2696                                        ,"vde"
2697 #endif
2698     };
2699     for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) {
2700         if (!strncmp(valid_param_list[i], device,
2701                      strlen(valid_param_list[i])))
2702             return 1;
2703     }
2704
2705     return 0;
2706 }
2707
2708 void net_host_device_add(Monitor *mon, const char *device, const char *opts)
2709 {
2710     if (!net_host_check_device(device)) {
2711         monitor_printf(mon, "invalid host network device %s\n", device);
2712         return;
2713     }
2714     if (net_client_init(mon, device, opts ? opts : "") < 0) {
2715         monitor_printf(mon, "adding host network device %s failed\n", device);
2716     }
2717 }
2718
2719 void net_host_device_remove(Monitor *mon, int vlan_id, const char *device)
2720 {
2721     VLANState *vlan;
2722     VLANClientState *vc;
2723
2724     vlan = qemu_find_vlan(vlan_id);
2725
2726     for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
2727         if (!strcmp(vc->name, device)) {
2728             break;
2729         }
2730     }
2731
2732     if (!vc) {
2733         monitor_printf(mon, "can't find device %s\n", device);
2734         return;
2735     }
2736     if (!net_host_check_device(vc->model)) {
2737         monitor_printf(mon, "invalid host network device %s\n", device);
2738         return;
2739     }
2740     qemu_del_vlan_client(vc);
2741 }
2742
2743 int net_client_parse(const char *str)
2744 {
2745     const char *p;
2746     char *q;
2747     char device[64];
2748
2749     p = str;
2750     q = device;
2751     while (*p != '\0' && *p != ',') {
2752         if ((q - device) < sizeof(device) - 1)
2753             *q++ = *p;
2754         p++;
2755     }
2756     *q = '\0';
2757     if (*p == ',')
2758         p++;
2759
2760     return net_client_init(NULL, device, p);
2761 }
2762
2763 void net_set_boot_mask(int net_boot_mask)
2764 {
2765     int i;
2766
2767     /* Only the first four NICs may be bootable */
2768     net_boot_mask = net_boot_mask & 0xF;
2769
2770     for (i = 0; i < nb_nics; i++) {
2771         if (net_boot_mask & (1 << i)) {
2772             nd_table[i].bootable = 1;
2773             net_boot_mask &= ~(1 << i);
2774         }
2775     }
2776
2777     if (net_boot_mask) {
2778         fprintf(stderr, "Cannot boot from non-existent NIC\n");
2779         exit(1);
2780     }
2781 }
2782
2783 void do_info_network(Monitor *mon)
2784 {
2785     VLANState *vlan;
2786     VLANClientState *vc;
2787
2788     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2789         monitor_printf(mon, "VLAN %d devices:\n", vlan->id);
2790         for(vc = vlan->first_client; vc != NULL; vc = vc->next)
2791             monitor_printf(mon, "  %s: %s\n", vc->name, vc->info_str);
2792     }
2793 }
2794
2795 int do_set_link(Monitor *mon, const char *name, const char *up_or_down)
2796 {
2797     VLANState *vlan;
2798     VLANClientState *vc = NULL;
2799
2800     for (vlan = first_vlan; vlan != NULL; vlan = vlan->next)
2801         for (vc = vlan->first_client; vc != NULL; vc = vc->next)
2802             if (strcmp(vc->name, name) == 0)
2803                 goto done;
2804 done:
2805
2806     if (!vc) {
2807         monitor_printf(mon, "could not find network device '%s'", name);
2808         return 0;
2809     }
2810
2811     if (strcmp(up_or_down, "up") == 0)
2812         vc->link_down = 0;
2813     else if (strcmp(up_or_down, "down") == 0)
2814         vc->link_down = 1;
2815     else
2816         monitor_printf(mon, "invalid link status '%s'; only 'up' or 'down' "
2817                        "valid\n", up_or_down);
2818
2819     if (vc->link_status_changed)
2820         vc->link_status_changed(vc);
2821
2822     return 1;
2823 }
2824
2825 void net_cleanup(void)
2826 {
2827     VLANState *vlan;
2828
2829     /* close network clients */
2830     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2831         VLANClientState *vc = vlan->first_client;
2832
2833         while (vc) {
2834             VLANClientState *next = vc->next;
2835
2836             qemu_del_vlan_client(vc);
2837
2838             vc = next;
2839         }
2840     }
2841 }
2842
2843 void net_client_check(void)
2844 {
2845     VLANState *vlan;
2846
2847     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2848         if (vlan->nb_guest_devs == 0 && vlan->nb_host_devs == 0)
2849             continue;
2850         if (vlan->nb_guest_devs == 0)
2851             fprintf(stderr, "Warning: vlan %d with no nics\n", vlan->id);
2852         if (vlan->nb_host_devs == 0)
2853             fprintf(stderr,
2854                     "Warning: vlan %d is not connected to host network\n",
2855                     vlan->id);
2856     }
2857 }