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 #include "slirp/libslirp.h"
 124
 125
 126 static VLANState *first_vlan;
 127
 128 /***********************************************************/
 129 /* network device redirectors */
 130
 131 #if defined(DEBUG_NET) || defined(DEBUG_SLIRP)
 132 static void hex_dump(FILE *f, const uint8_t *buf, int size)
 133 {
 134     int len, i, j, c;
 135
 136     for(i=0;i<size;i+=16) {
 137         len = size - i;
 138         if (len > 16)
 139             len = 16;
 140         fprintf(f, "%08x ", i);
 141         for(j=0;j<16;j++) {
 142             if (j < len)
 143                 fprintf(f, " %02x", buf[i+j]);
 144             else
 145                 fprintf(f, "   ");
 146         }
 147         fprintf(f, " ");
 148         for(j=0;j<len;j++) {
 149             c = buf[i+j];
 150             if (c < ' ' || c > '~')
 151                 c = '.';
 152             fprintf(f, "%c", c);
 153         }
 154         fprintf(f, "\n");
 155     }
 156 }
 157 #endif
 158
 159 static int parse_macaddr(uint8_t *macaddr, const char *p)
 160 {
 161     int i;
 162     char *last_char;
 163     long int offset;
 164
 165     errno = 0;
 166     offset = strtol(p, &last_char, 0);
 167     if (0 == errno && '\0' == *last_char &&
 168             offset >= 0 && offset <= 0xFFFFFF) {
 169         macaddr[3] = (offset & 0xFF0000) >> 16;
 170         macaddr[4] = (offset & 0xFF00) >> 8;
 171         macaddr[5] = offset & 0xFF;
 172         return 0;
 173     } else {
 174         for(i = 0; i < 6; i++) {
 175             macaddr[i] = strtol(p, (char **)&p, 16);
 176             if (i == 5) {
 177                 if (*p != '\0')
 178                     return -1;
 179             } else {
 180                 if (*p != ':' && *p != '-')
 181                     return -1;
 182                 p++;
 183             }
 184         }
 185         return 0;
 186     }
 187
 188     return -1;
 189 }
 190
 191 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
 192 {
 193     const char *p, *p1;
 194     int len;
 195     p = *pp;
 196     p1 = strchr(p, sep);
 197     if (!p1)
 198         return -1;
 199     len = p1 - p;
 200     p1++;
 201     if (buf_size > 0) {
 202         if (len > buf_size - 1)
 203             len = buf_size - 1;
 204         memcpy(buf, p, len);
 205         buf[len] = '\0';
 206     }
 207     *pp = p1;
 208     return 0;
 209 }
 210
 211 int parse_host_src_port(struct sockaddr_in *haddr,
 212                         struct sockaddr_in *saddr,
 213                         const char *input_str)
 214 {
 215     char *str = strdup(input_str);
 216     char *host_str = str;
 217     char *src_str;
 218     const char *src_str2;
 219     char *ptr;
 220
 221     /*
 222      * Chop off any extra arguments at the end of the string which
 223      * would start with a comma, then fill in the src port information
 224      * if it was provided else use the "any address" and "any port".
 225      */
 226     if ((ptr = strchr(str,',')))
 227         *ptr = '\0';
 228
 229     if ((src_str = strchr(input_str,'@'))) {
 230         *src_str = '\0';
 231         src_str++;
 232     }
 233
 234     if (parse_host_port(haddr, host_str) < 0)
 235         goto fail;
 236
 237     src_str2 = src_str;
 238     if (!src_str || *src_str == '\0')
 239         src_str2 = ":0";
 240
 241     if (parse_host_port(saddr, src_str2) < 0)
 242         goto fail;
 243
 244     free(str);
 245     return(0);
 246
 247 fail:
 248     free(str);
 249     return -1;
 250 }
 251
 252 int parse_host_port(struct sockaddr_in *saddr, const char *str)
 253 {
 254     char buf[512];
 255     struct hostent *he;
 256     const char *p, *r;
 257     int port;
 258
 259     p = str;
 260     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 261         return -1;
 262     saddr->sin_family = AF_INET;
 263     if (buf[0] == '\0') {
 264         saddr->sin_addr.s_addr = 0;
 265     } else {
 266         if (qemu_isdigit(buf[0])) {
 267             if (!inet_aton(buf, &saddr->sin_addr))
 268                 return -1;
 269         } else {
 270             if ((he = gethostbyname(buf)) == NULL)
 271                 return - 1;
 272             saddr->sin_addr = *(struct in_addr *)he->h_addr;
 273         }
 274     }
 275     port = strtol(p, (char **)&r, 0);
 276     if (r == p)
 277         return -1;
 278     saddr->sin_port = htons(port);
 279     return 0;
 280 }
 281
 282 #if !defined(_WIN32) && 0
 283 static int parse_unix_path(struct sockaddr_un *uaddr, const char *str)
 284 {
 285     const char *p;
 286     int len;
 287
 288     len = MIN(108, strlen(str));
 289     p = strchr(str, ',');
 290     if (p)
 291         len = MIN(len, p - str);
 292
 293     memset(uaddr, 0, sizeof(*uaddr));
 294
 295     uaddr->sun_family = AF_UNIX;
 296     memcpy(uaddr->sun_path, str, len);
 297
 298     return 0;
 299 }
 300 #endif
 301
 302 void qemu_format_nic_info_str(VLANClientState *vc, uint8_t macaddr[6])
 303 {
 304     snprintf(vc->info_str, sizeof(vc->info_str),
 305              "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x",
 306              vc->model,
 307              macaddr[0], macaddr[1], macaddr[2],
 308              macaddr[3], macaddr[4], macaddr[5]);
 309 }
 310
 311 static char *assign_name(VLANClientState *vc1, const char *model)
 312 {
 313     VLANState *vlan;
 314     char buf[256];
 315     int id = 0;
 316
 317     for (vlan = first_vlan; vlan; vlan = vlan->next) {
 318         VLANClientState *vc;
 319
 320         for (vc = vlan->first_client; vc; vc = vc->next)
 321             if (vc != vc1 && strcmp(vc->model, model) == 0)
 322                 id++;
 323     }
 324
 325     snprintf(buf, sizeof(buf), "%s.%d", model, id);
 326
 327     return strdup(buf);
 328 }
 329
 330 VLANClientState *qemu_new_vlan_client(VLANState *vlan,
 331                                       const char *model,
 332                                       const char *name,
 333                                       NetCanReceive *can_receive,
 334                                       NetReceive *receive,
 335                                       NetReceiveIOV *receive_iov,
 336                                       NetCleanup *cleanup,
 337                                       void *opaque)
 338 {
 339     VLANClientState *vc, **pvc;
 340     vc = qemu_mallocz(sizeof(VLANClientState));
 341     vc->model = strdup(model);
 342     if (name)
 343         vc->name = strdup(name);
 344     else
 345         vc->name = assign_name(vc, model);
 346     vc->can_receive = can_receive;
 347     vc->receive = receive;
 348     vc->receive_iov = receive_iov;
 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 *sender)
 393 {
 394     VLANState *vlan = sender->vlan;
 395     VLANClientState *vc;
 396
 397     for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
 398         if (vc == sender) {
 399             continue;
 400         }
 401
 402         /* no can_receive() handler, they can always receive */
 403         if (!vc->can_receive || vc->can_receive(vc)) {
 404             return 1;
 405         }
 406     }
 407     return 0;
 408 }
 409
 410 static int
 411 qemu_deliver_packet(VLANClientState *sender, const uint8_t *buf, int size)
 412 {
 413     VLANClientState *vc;
 414     int ret = -1;
 415
 416     sender->vlan->delivering = 1;
 417
 418     for (vc = sender->vlan->first_client; vc != NULL; vc = vc->next) {
 419         ssize_t len;
 420
 421         if (vc == sender) {
 422             continue;
 423         }
 424
 425         if (vc->link_down) {
 426             ret = size;
 427             continue;
 428         }
 429
 430         len = vc->receive(vc, buf, size);
 431
 432         ret = (ret >= 0) ? ret : len;
 433     }
 434
 435     sender->vlan->delivering = 0;
 436
 437     return ret;
 438 }
 439
 440 void qemu_purge_queued_packets(VLANClientState *vc)
 441 {
 442     VLANPacket **pp = &vc->vlan->send_queue;
 443
 444     while (*pp != NULL) {
 445         VLANPacket *packet = *pp;
 446
 447         if (packet->sender == vc) {
 448             *pp = packet->next;
 449             qemu_free(packet);
 450         } else {
 451             pp = &packet->next;
 452         }
 453     }
 454 }
 455
 456 void qemu_flush_queued_packets(VLANClientState *vc)
 457 {
 458     VLANPacket *packet;
 459
 460     while ((packet = vc->vlan->send_queue) != NULL) {
 461         int ret;
 462
 463         vc->vlan->send_queue = packet->next;
 464
 465         ret = qemu_deliver_packet(packet->sender, packet->data, packet->size);
 466         if (ret == 0 && packet->sent_cb != NULL) {
 467             packet->next = vc->vlan->send_queue;
 468             vc->vlan->send_queue = packet;
 469             break;
 470         }
 471
 472         if (packet->sent_cb)
 473             packet->sent_cb(packet->sender, ret);
 474
 475         qemu_free(packet);
 476     }
 477 }
 478
 479 static void qemu_enqueue_packet(VLANClientState *sender,
 480                                 const uint8_t *buf, int size,
 481                                 NetPacketSent *sent_cb)
 482 {
 483     VLANPacket *packet;
 484
 485     packet = qemu_malloc(sizeof(VLANPacket) + size);
 486     packet->next = sender->vlan->send_queue;
 487     packet->sender = sender;
 488     packet->size = size;
 489     packet->sent_cb = sent_cb;
 490     memcpy(packet->data, buf, size);
 491     sender->vlan->send_queue = packet;
 492 }
 493
 494 ssize_t qemu_send_packet_async(VLANClientState *sender,
 495                                const uint8_t *buf, int size,
 496                                NetPacketSent *sent_cb)
 497 {
 498     int ret;
 499
 500     if (sender->link_down) {
 501         return size;
 502     }
 503
 504 #ifdef DEBUG_NET
 505     printf("vlan %d send:\n", sender->vlan->id);
 506     hex_dump(stdout, buf, size);
 507 #endif
 508
 509     if (sender->vlan->delivering) {
 510         qemu_enqueue_packet(sender, buf, size, NULL);
 511         return size;
 512     }
 513
 514     ret = qemu_deliver_packet(sender, buf, size);
 515     if (ret == 0 && sent_cb != NULL) {
 516         qemu_enqueue_packet(sender, buf, size, sent_cb);
 517         return 0;
 518     }
 519
 520     qemu_flush_queued_packets(sender);
 521
 522     return ret;
 523 }
 524
 525 void qemu_send_packet(VLANClientState *vc, const uint8_t *buf, int size)
 526 {
 527     qemu_send_packet_async(vc, buf, size, NULL);
 528 }
 529
 530 static ssize_t vc_sendv_compat(VLANClientState *vc, const struct iovec *iov,
 531                                int iovcnt)
 532 {
 533     uint8_t buffer[4096];
 534     size_t offset = 0;
 535     int i;
 536
 537     for (i = 0; i < iovcnt; i++) {
 538         size_t len;
 539
 540         len = MIN(sizeof(buffer) - offset, iov[i].iov_len);
 541         memcpy(buffer + offset, iov[i].iov_base, len);
 542         offset += len;
 543     }
 544
 545     return vc->receive(vc, buffer, offset);
 546 }
 547
 548 static ssize_t calc_iov_length(const struct iovec *iov, int iovcnt)
 549 {
 550     size_t offset = 0;
 551     int i;
 552
 553     for (i = 0; i < iovcnt; i++)
 554         offset += iov[i].iov_len;
 555     return offset;
 556 }
 557
 558 static int qemu_deliver_packet_iov(VLANClientState *sender,
 559                                    const struct iovec *iov, int iovcnt)
 560 {
 561     VLANClientState *vc;
 562     int ret = -1;
 563
 564     sender->vlan->delivering = 1;
 565
 566     for (vc = sender->vlan->first_client; vc != NULL; vc = vc->next) {
 567         ssize_t len;
 568
 569         if (vc == sender) {
 570             continue;
 571         }
 572
 573         if (vc->link_down) {
 574             ret = calc_iov_length(iov, iovcnt);
 575             continue;
 576         }
 577
 578         if (vc->receive_iov) {
 579             len = vc->receive_iov(vc, iov, iovcnt);
 580         } else {
 581             len = vc_sendv_compat(vc, iov, iovcnt);
 582         }
 583
 584         ret = (ret >= 0) ? ret : len;
 585     }
 586
 587     sender->vlan->delivering = 0;
 588
 589     return ret;
 590 }
 591
 592 static ssize_t qemu_enqueue_packet_iov(VLANClientState *sender,
 593                                        const struct iovec *iov, int iovcnt,
 594                                        NetPacketSent *sent_cb)
 595 {
 596     VLANPacket *packet;
 597     size_t max_len = 0;
 598     int i;
 599
 600     max_len = calc_iov_length(iov, iovcnt);
 601
 602     packet = qemu_malloc(sizeof(VLANPacket) + max_len);
 603     packet->next = sender->vlan->send_queue;
 604     packet->sender = sender;
 605     packet->sent_cb = sent_cb;
 606     packet->size = 0;
 607
 608     for (i = 0; i < iovcnt; i++) {
 609         size_t len = iov[i].iov_len;
 610
 611         memcpy(packet->data + packet->size, iov[i].iov_base, len);
 612         packet->size += len;
 613     }
 614
 615     sender->vlan->send_queue = packet;
 616
 617     return packet->size;
 618 }
 619
 620 ssize_t qemu_sendv_packet_async(VLANClientState *sender,
 621                                 const struct iovec *iov, int iovcnt,
 622                                 NetPacketSent *sent_cb)
 623 {
 624     int ret;
 625
 626     if (sender->link_down) {
 627         return calc_iov_length(iov, iovcnt);
 628     }
 629
 630     if (sender->vlan->delivering) {
 631         return qemu_enqueue_packet_iov(sender, iov, iovcnt, NULL);
 632     }
 633
 634     ret = qemu_deliver_packet_iov(sender, iov, iovcnt);
 635     if (ret == 0 && sent_cb != NULL) {
 636         qemu_enqueue_packet_iov(sender, iov, iovcnt, sent_cb);
 637         return 0;
 638     }
 639
 640     qemu_flush_queued_packets(sender);
 641
 642     return ret;
 643 }
 644
 645 ssize_t
 646 qemu_sendv_packet(VLANClientState *vc, const struct iovec *iov, int iovcnt)
 647 {
 648     return qemu_sendv_packet_async(vc, iov, iovcnt, NULL);
 649 }
 650
 651 static void config_error(Monitor *mon, const char *fmt, ...)
 652 {
 653     va_list ap;
 654
 655     va_start(ap, fmt);
 656     if (mon) {
 657         monitor_vprintf(mon, fmt, ap);
 658     } else {
 659         fprintf(stderr, "qemu: ");
 660         vfprintf(stderr, fmt, ap);
 661         exit(1);
 662     }
 663     va_end(ap);
 664 }
 665
 666 #if defined(CONFIG_SLIRP)
 667
 668 /* slirp network adapter */
 669
 670 #define SLIRP_CFG_HOSTFWD 1
 671 #define SLIRP_CFG_LEGACY  2
 672
 673 struct slirp_config_str {
 674     struct slirp_config_str *next;
 675     int flags;
 676     char str[1024];
 677     int legacy_format;
 678 };
 679
 680 static int slirp_inited;
 681 static struct slirp_config_str *slirp_configs;
 682 const char *legacy_tftp_prefix;
 683 const char *legacy_bootp_filename;
 684 static VLANClientState *slirp_vc;
 685
 686 static void slirp_hostfwd(Monitor *mon, const char *redir_str,
 687                           int legacy_format);
 688 static void slirp_guestfwd(Monitor *mon, const char *config_str,
 689                            int legacy_format);
 690
 691 #ifndef _WIN32
 692 static const char *legacy_smb_export;
 693
 694 static void slirp_smb(const char *exported_dir, struct in_addr vserver_addr);
 695 #endif
 696
 697 int slirp_can_output(void)
 698 {
 699     return qemu_can_send_packet(slirp_vc);
 700 }
 701
 702 void slirp_output(const uint8_t *pkt, int pkt_len)
 703 {
 704 #ifdef DEBUG_SLIRP
 705     printf("slirp output:\n");
 706     hex_dump(stdout, pkt, pkt_len);
 707 #endif
 708     qemu_send_packet(slirp_vc, pkt, pkt_len);
 709 }
 710
 711 static ssize_t slirp_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
 712 {
 713 #ifdef DEBUG_SLIRP
 714     printf("slirp input:\n");
 715     hex_dump(stdout, buf, size);
 716 #endif
 717     slirp_input(buf, size);
 718     return size;
 719 }
 720
 721 static int slirp_in_use;
 722
 723 static void net_slirp_cleanup(VLANClientState *vc)
 724 {
 725     slirp_in_use = 0;
 726 }
 727
 728 static int net_slirp_init(Monitor *mon, VLANState *vlan, const char *model,
 729                           const char *name, int restricted,
 730                           const char *vnetwork, const char *vhost,
 731                           const char *vhostname, const char *tftp_export,
 732                           const char *bootfile, const char *vdhcp_start,
 733                           const char *vnameserver, const char *smb_export,
 734                           const char *vsmbserver)
 735 {
 736     if (slirp_in_use) {
 737         /* slirp only supports a single instance so far */
 738         return -1;
 739     }
 740     if (!slirp_inited) {
 741         /* default settings according to historic slirp */
 742         struct in_addr net  = { .s_addr = htonl(0x0a000000) }; /* 10.0.0.0 */
 743         struct in_addr mask = { .s_addr = htonl(0xff000000) }; /* 255.0.0.0 */
 744         struct in_addr host = { .s_addr = htonl(0x0a000202) }; /* 10.0.2.2 */
 745         struct in_addr dhcp = { .s_addr = htonl(0x0a00020f) }; /* 10.0.2.15 */
 746         struct in_addr dns  = { .s_addr = htonl(0x0a000203) }; /* 10.0.2.3 */
 747 #ifndef _WIN32
 748         struct in_addr smbsrv = { .s_addr = 0 };
 749 #endif
 750         char buf[20];
 751         uint32_t addr;
 752         int shift;
 753         char *end;
 754
 755         if (!tftp_export) {
 756             tftp_export = legacy_tftp_prefix;
 757         }
 758         if (!bootfile) {
 759             bootfile = legacy_bootp_filename;
 760         }
 761
 762         if (vnetwork) {
 763             if (get_str_sep(buf, sizeof(buf), &vnetwork, '/') < 0) {
 764                 if (!inet_aton(vnetwork, &net)) {
 765                     return -1;
 766                 }
 767                 addr = ntohl(net.s_addr);
 768                 if (!(addr & 0x80000000)) {
 769                     mask.s_addr = htonl(0xff000000); /* class A */
 770                 } else if ((addr & 0xfff00000) == 0xac100000) {
 771                     mask.s_addr = htonl(0xfff00000); /* priv. 172.16.0.0/12 */
 772                 } else if ((addr & 0xc0000000) == 0x80000000) {
 773                     mask.s_addr = htonl(0xffff0000); /* class B */
 774                 } else if ((addr & 0xffff0000) == 0xc0a80000) {
 775                     mask.s_addr = htonl(0xffff0000); /* priv. 192.168.0.0/16 */
 776                 } else if ((addr & 0xffff0000) == 0xc6120000) {
 777                     mask.s_addr = htonl(0xfffe0000); /* tests 198.18.0.0/15 */
 778                 } else if ((addr & 0xe0000000) == 0xe0000000) {
 779                     mask.s_addr = htonl(0xffffff00); /* class C */
 780                 } else {
 781                     mask.s_addr = htonl(0xfffffff0); /* multicast/reserved */
 782                 }
 783             } else {
 784                 if (!inet_aton(buf, &net)) {
 785                     return -1;
 786                 }
 787                 shift = strtol(vnetwork, &end, 10);
 788                 if (*end != '\0') {
 789                     if (!inet_aton(vnetwork, &mask)) {
 790                         return -1;
 791                     }
 792                 } else if (shift < 4 || shift > 32) {
 793                     return -1;
 794                 } else {
 795                     mask.s_addr = htonl(0xffffffff << (32 - shift));
 796                 }
 797             }
 798             net.s_addr &= mask.s_addr;
 799             host.s_addr = net.s_addr | (htonl(0x0202) & ~mask.s_addr);
 800             dhcp.s_addr = net.s_addr | (htonl(0x020f) & ~mask.s_addr);
 801             dns.s_addr  = net.s_addr | (htonl(0x0203) & ~mask.s_addr);
 802         }
 803
 804         if (vhost && !inet_aton(vhost, &host)) {
 805             return -1;
 806         }
 807         if ((host.s_addr & mask.s_addr) != net.s_addr) {
 808             return -1;
 809         }
 810
 811         if (vdhcp_start && !inet_aton(vdhcp_start, &dhcp)) {
 812             return -1;
 813         }
 814         if ((dhcp.s_addr & mask.s_addr) != net.s_addr ||
 815             dhcp.s_addr == host.s_addr || dhcp.s_addr == dns.s_addr) {
 816             return -1;
 817         }
 818
 819         if (vnameserver && !inet_aton(vnameserver, &dns)) {
 820             return -1;
 821         }
 822         if ((dns.s_addr & mask.s_addr) != net.s_addr ||
 823             dns.s_addr == host.s_addr) {
 824             return -1;
 825         }
 826
 827 #ifndef _WIN32
 828         if (vsmbserver && !inet_aton(vsmbserver, &smbsrv)) {
 829             return -1;
 830         }
 831 #endif
 832
 833         slirp_init(restricted, net, mask, host, vhostname, tftp_export,
 834                    bootfile, dhcp, dns);
 835         slirp_inited = 1;
 836
 837         while (slirp_configs) {
 838             struct slirp_config_str *config = slirp_configs;
 839
 840             if (config->flags & SLIRP_CFG_HOSTFWD) {
 841                 slirp_hostfwd(mon, config->str,
 842                               config->flags & SLIRP_CFG_LEGACY);
 843             } else {
 844                 slirp_guestfwd(mon, config->str,
 845                                config->flags & SLIRP_CFG_LEGACY);
 846             }
 847             slirp_configs = config->next;
 848             qemu_free(config);
 849         }
 850 #ifndef _WIN32
 851         if (!smb_export) {
 852             smb_export = legacy_smb_export;
 853         }
 854         if (smb_export) {
 855             slirp_smb(smb_export, smbsrv);
 856         }
 857 #endif
 858     }
 859
 860     slirp_vc = qemu_new_vlan_client(vlan, model, name, NULL, slirp_receive,
 861                                     NULL, net_slirp_cleanup, NULL);
 862     slirp_vc->info_str[0] = '\0';
 863     slirp_in_use = 1;
 864     return 0;
 865 }
 866
 867 void net_slirp_hostfwd_remove(Monitor *mon, const char *src_str)
 868 {
 869     struct in_addr host_addr = { .s_addr = INADDR_ANY };
 870     int host_port;
 871     char buf[256] = "";
 872     const char *p = src_str;
 873     int is_udp = 0;
 874     int err;
 875
 876     if (!slirp_inited) {
 877         monitor_printf(mon, "user mode network stack not in use\n");
 878         return;
 879     }
 880
 881     if (!src_str || !src_str[0])
 882         goto fail_syntax;
 883
 884     get_str_sep(buf, sizeof(buf), &p, ':');
 885
 886     if (!strcmp(buf, "tcp") || buf[0] == '\0') {
 887         is_udp = 0;
 888     } else if (!strcmp(buf, "udp")) {
 889         is_udp = 1;
 890     } else {
 891         goto fail_syntax;
 892     }
 893
 894     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 895         goto fail_syntax;
 896     }
 897     if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
 898         goto fail_syntax;
 899     }
 900
 901     host_port = atoi(p);
 902
 903     err = slirp_remove_hostfwd(is_udp, host_addr, host_port);
 904
 905     monitor_printf(mon, "host forwarding rule for %s %s\n", src_str,
 906                    err ? "removed" : "not found");
 907     return;
 908
 909  fail_syntax:
 910     monitor_printf(mon, "invalid format\n");
 911 }
 912
 913 static void slirp_hostfwd(Monitor *mon, const char *redir_str,
 914                           int legacy_format)
 915 {
 916     struct in_addr host_addr = { .s_addr = INADDR_ANY };
 917     struct in_addr guest_addr = { .s_addr = 0 };
 918     int host_port, guest_port;
 919     const char *p;
 920     char buf[256];
 921     int is_udp;
 922     char *end;
 923
 924     p = redir_str;
 925     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 926         goto fail_syntax;
 927     }
 928     if (!strcmp(buf, "tcp") || buf[0] == '\0') {
 929         is_udp = 0;
 930     } else if (!strcmp(buf, "udp")) {
 931         is_udp = 1;
 932     } else {
 933         goto fail_syntax;
 934     }
 935
 936     if (!legacy_format) {
 937         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 938             goto fail_syntax;
 939         }
 940         if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
 941             goto fail_syntax;
 942         }
 943     }
 944
 945     if (get_str_sep(buf, sizeof(buf), &p, legacy_format ? ':' : '-') < 0) {
 946         goto fail_syntax;
 947     }
 948     host_port = strtol(buf, &end, 0);
 949     if (*end != '\0' || host_port < 1 || host_port > 65535) {
 950         goto fail_syntax;
 951     }
 952
 953     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 954         goto fail_syntax;
 955     }
 956     if (buf[0] != '\0' && !inet_aton(buf, &guest_addr)) {
 957         goto fail_syntax;
 958     }
 959
 960     guest_port = strtol(p, &end, 0);
 961     if (*end != '\0' || guest_port < 1 || guest_port > 65535) {
 962         goto fail_syntax;
 963     }
 964
 965     if (slirp_add_hostfwd(is_udp, host_addr, host_port,
 966                           guest_addr, guest_port) < 0) {
 967         config_error(mon, "could not set up host forwarding rule '%s'\n",
 968                      redir_str);
 969     }
 970     return;
 971
 972  fail_syntax:
 973     config_error(mon, "invalid host forwarding rule '%s'\n", redir_str);
 974 }
 975
 976 void net_slirp_hostfwd_add(Monitor *mon, const char *redir_str)
 977 {
 978     if (!slirp_inited) {
 979         monitor_printf(mon, "user mode network stack not in use\n");
 980         return;
 981     }
 982
 983     slirp_hostfwd(mon, redir_str, 0);
 984 }
 985
 986 void net_slirp_redir(const char *redir_str)
 987 {
 988     struct slirp_config_str *config;
 989
 990     if (!slirp_inited) {
 991         config = qemu_malloc(sizeof(*config));
 992         pstrcpy(config->str, sizeof(config->str), redir_str);
 993         config->flags = SLIRP_CFG_HOSTFWD | SLIRP_CFG_LEGACY;
 994         config->next = slirp_configs;
 995         slirp_configs = config;
 996         return;
 997     }
 998
 999     slirp_hostfwd(NULL, redir_str, 1);
1000 }
1001
1002 #ifndef _WIN32
1003
1004 static char smb_dir[1024];
1005
1006 static void erase_dir(char *dir_name)
1007 {
1008     DIR *d;
1009     struct dirent *de;
1010     char filename[1024];
1011
1012     /* erase all the files in the directory */
1013     if ((d = opendir(dir_name)) != NULL) {
1014         for(;;) {
1015             de = readdir(d);
1016             if (!de)
1017                 break;
1018             if (strcmp(de->d_name, ".") != 0 &&
1019                 strcmp(de->d_name, "..") != 0) {
1020                 snprintf(filename, sizeof(filename), "%s/%s",
1021                          smb_dir, de->d_name);
1022                 if (unlink(filename) != 0)  /* is it a directory? */
1023                     erase_dir(filename);
1024             }
1025         }
1026         closedir(d);
1027         rmdir(dir_name);
1028     }
1029 }
1030
1031 /* automatic user mode samba server configuration */
1032 static void smb_exit(void)
1033 {
1034     erase_dir(smb_dir);
1035 }
1036
1037 static void slirp_smb(const char *exported_dir, struct in_addr vserver_addr)
1038 {
1039     char smb_conf[1024];
1040     char smb_cmdline[1024];
1041     FILE *f;
1042
1043     /* XXX: better tmp dir construction */
1044     snprintf(smb_dir, sizeof(smb_dir), "/tmp/qemu-smb.%ld", (long)getpid());
1045     if (mkdir(smb_dir, 0700) < 0) {
1046         fprintf(stderr, "qemu: could not create samba server dir '%s'\n", smb_dir);
1047         exit(1);
1048     }
1049     snprintf(smb_conf, sizeof(smb_conf), "%s/%s", smb_dir, "smb.conf");
1050
1051     f = fopen(smb_conf, "w");
1052     if (!f) {
1053         fprintf(stderr, "qemu: could not create samba server configuration file '%s'\n", smb_conf);
1054         exit(1);
1055     }
1056     fprintf(f,
1057             "[global]\n"
1058             "private dir=%s\n"
1059             "smb ports=0\n"
1060             "socket address=127.0.0.1\n"
1061             "pid directory=%s\n"
1062             "lock directory=%s\n"
1063             "log file=%s/log.smbd\n"
1064             "smb passwd file=%s/smbpasswd\n"
1065             "security = share\n"
1066             "[qemu]\n"
1067             "path=%s\n"
1068             "read only=no\n"
1069             "guest ok=yes\n",
1070             smb_dir,
1071             smb_dir,
1072             smb_dir,
1073             smb_dir,
1074             smb_dir,
1075             exported_dir
1076             );
1077     fclose(f);
1078     atexit(smb_exit);
1079
1080     snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -s %s",
1081              SMBD_COMMAND, smb_conf);
1082
1083     if (slirp_add_exec(0, smb_cmdline, vserver_addr, 139) < 0) {
1084         fprintf(stderr, "conflicting/invalid smbserver address\n");
1085         exit(1);
1086     }
1087 }
1088
1089 /* automatic user mode samba server configuration (legacy interface) */
1090 void net_slirp_smb(const char *exported_dir)
1091 {
1092     struct in_addr vserver_addr = { .s_addr = 0 };
1093
1094     if (legacy_smb_export) {
1095         fprintf(stderr, "-smb given twice\n");
1096         exit(1);
1097     }
1098     legacy_smb_export = exported_dir;
1099     if (slirp_inited) {
1100         slirp_smb(exported_dir, vserver_addr);
1101     }
1102 }
1103
1104 #endif /* !defined(_WIN32) */
1105
1106 struct GuestFwd {
1107     CharDriverState *hd;
1108     struct in_addr server;
1109     int port;
1110 };
1111
1112 static int guestfwd_can_read(void *opaque)
1113 {
1114     struct GuestFwd *fwd = opaque;
1115     return slirp_socket_can_recv(fwd->server, fwd->port);
1116 }
1117
1118 static void guestfwd_read(void *opaque, const uint8_t *buf, int size)
1119 {
1120     struct GuestFwd *fwd = opaque;
1121     slirp_socket_recv(fwd->server, fwd->port, buf, size);
1122 }
1123
1124 static void slirp_guestfwd(Monitor *mon, const char *config_str,
1125                            int legacy_format)
1126 {
1127     struct in_addr server = { .s_addr = 0 };
1128     struct GuestFwd *fwd;
1129     const char *p;
1130     char buf[128];
1131     char *end;
1132     int port;
1133
1134     p = config_str;
1135     if (legacy_format) {
1136         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1137             goto fail_syntax;
1138         }
1139     } else {
1140         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1141             goto fail_syntax;
1142         }
1143         if (strcmp(buf, "tcp") && buf[0] != '\0') {
1144             goto fail_syntax;
1145         }
1146         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1147             goto fail_syntax;
1148         }
1149         if (buf[0] != '\0' && !inet_aton(buf, &server)) {
1150             goto fail_syntax;
1151         }
1152         if (get_str_sep(buf, sizeof(buf), &p, '-') < 0) {
1153             goto fail_syntax;
1154         }
1155     }
1156     port = strtol(buf, &end, 10);
1157     if (*end != '\0' || port < 1 || port > 65535) {
1158         goto fail_syntax;
1159     }
1160
1161     fwd = qemu_malloc(sizeof(struct GuestFwd));
1162     snprintf(buf, sizeof(buf), "guestfwd.tcp:%d", port);
1163     fwd->hd = qemu_chr_open(buf, p, NULL);
1164     if (!fwd->hd) {
1165         config_error(mon, "could not open guest forwarding device '%s'\n",
1166                      buf);
1167         qemu_free(fwd);
1168         return;
1169     }
1170     fwd->server = server;
1171     fwd->port = port;
1172
1173     if (slirp_add_exec(3, fwd->hd, server, port) < 0) {
1174         config_error(mon, "conflicting/invalid host:port in guest forwarding "
1175                      "rule '%s'\n", config_str);
1176         qemu_free(fwd);
1177         return;
1178     }
1179     qemu_chr_add_handlers(fwd->hd, guestfwd_can_read, guestfwd_read,
1180                           NULL, fwd);
1181     return;
1182
1183  fail_syntax:
1184     config_error(mon, "invalid guest forwarding rule '%s'\n", config_str);
1185 }
1186
1187 void do_info_usernet(Monitor *mon)
1188 {
1189     monitor_printf(mon, "VLAN %d (%s):\n", slirp_vc->vlan->id, slirp_vc->name);
1190     slirp_connection_info(mon);
1191 }
1192
1193 #endif /* CONFIG_SLIRP */
1194
1195 #if !defined(_WIN32)
1196
1197 typedef struct TAPState {
1198     VLANClientState *vc;
1199     int fd;
1200     char down_script[1024];
1201     char down_script_arg[128];
1202     uint8_t buf[4096];
1203     unsigned int read_poll : 1;
1204     unsigned int write_poll : 1;
1205 } TAPState;
1206
1207 static int launch_script(const char *setup_script, const char *ifname, int fd);
1208
1209 static int tap_can_send(void *opaque);
1210 static void tap_send(void *opaque);
1211 static void tap_writable(void *opaque);
1212
1213 static void tap_update_fd_handler(TAPState *s)
1214 {
1215     qemu_set_fd_handler2(s->fd,
1216                          s->read_poll  ? tap_can_send : NULL,
1217                          s->read_poll  ? tap_send     : NULL,
1218                          s->write_poll ? tap_writable : NULL,
1219                          s);
1220 }
1221
1222 static void tap_read_poll(TAPState *s, int enable)
1223 {
1224     s->read_poll = !!enable;
1225     tap_update_fd_handler(s);
1226 }
1227
1228 static void tap_write_poll(TAPState *s, int enable)
1229 {
1230     s->write_poll = !!enable;
1231     tap_update_fd_handler(s);
1232 }
1233
1234 static void tap_writable(void *opaque)
1235 {
1236     TAPState *s = opaque;
1237
1238     tap_write_poll(s, 0);
1239
1240     qemu_flush_queued_packets(s->vc);
1241 }
1242
1243 static ssize_t tap_receive_iov(VLANClientState *vc, const struct iovec *iov,
1244                                int iovcnt)
1245 {
1246     TAPState *s = vc->opaque;
1247     ssize_t len;
1248
1249     do {
1250         len = writev(s->fd, iov, iovcnt);
1251     } while (len == -1 && errno == EINTR);
1252
1253     if (len == -1 && errno == EAGAIN) {
1254         tap_write_poll(s, 1);
1255         return 0;
1256     }
1257
1258     return len;
1259 }
1260
1261 static ssize_t tap_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1262 {
1263     TAPState *s = vc->opaque;
1264     ssize_t len;
1265
1266     do {
1267         len = write(s->fd, buf, size);
1268     } while (len == -1 && (errno == EINTR || errno == EAGAIN));
1269
1270     return len;
1271 }
1272
1273 static int tap_can_send(void *opaque)
1274 {
1275     TAPState *s = opaque;
1276
1277     return qemu_can_send_packet(s->vc);
1278 }
1279
1280 #ifdef __sun__
1281 static ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
1282 {
1283     struct strbuf sbuf;
1284     int f = 0;
1285
1286     sbuf.maxlen = maxlen;
1287     sbuf.buf = (char *)buf;
1288
1289     return getmsg(tapfd, NULL, &sbuf, &f) >= 0 ? sbuf.len : -1;
1290 }
1291 #else
1292 static ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
1293 {
1294     return read(tapfd, buf, maxlen);
1295 }
1296 #endif
1297
1298 static void tap_send_completed(VLANClientState *vc, ssize_t len)
1299 {
1300     TAPState *s = vc->opaque;
1301     tap_read_poll(s, 1);
1302 }
1303
1304 static void tap_send(void *opaque)
1305 {
1306     TAPState *s = opaque;
1307     int size;
1308
1309     do {
1310         size = tap_read_packet(s->fd, s->buf, sizeof(s->buf));
1311         if (size <= 0) {
1312             break;
1313         }
1314
1315         size = qemu_send_packet_async(s->vc, s->buf, size, tap_send_completed);
1316         if (size == 0) {
1317             tap_read_poll(s, 0);
1318         }
1319     } while (size > 0);
1320 }
1321
1322 static void tap_set_sndbuf(TAPState *s, int sndbuf, Monitor *mon)
1323 {
1324 #ifdef TUNSETSNDBUF
1325     if (ioctl(s->fd, TUNSETSNDBUF, &sndbuf) == -1) {
1326         config_error(mon, "TUNSETSNDBUF ioctl failed: %s\n",
1327                      strerror(errno));
1328     }
1329 #else
1330     config_error(mon, "No '-net tap,sndbuf=<nbytes>' support available\n");
1331 #endif
1332 }
1333
1334 static void tap_cleanup(VLANClientState *vc)
1335 {
1336     TAPState *s = vc->opaque;
1337
1338     qemu_purge_queued_packets(vc);
1339
1340     if (s->down_script[0])
1341         launch_script(s->down_script, s->down_script_arg, s->fd);
1342
1343     tap_read_poll(s, 0);
1344     tap_write_poll(s, 0);
1345     close(s->fd);
1346     qemu_free(s);
1347 }
1348
1349 /* fd support */
1350
1351 static TAPState *net_tap_fd_init(VLANState *vlan,
1352                                  const char *model,
1353                                  const char *name,
1354                                  int fd)
1355 {
1356     TAPState *s;
1357
1358     s = qemu_mallocz(sizeof(TAPState));
1359     s->fd = fd;
1360     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, tap_receive,
1361                                  tap_receive_iov, tap_cleanup, s);
1362     tap_read_poll(s, 1);
1363     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "fd=%d", fd);
1364     return s;
1365 }
1366
1367 #if defined (HOST_BSD) || defined (__FreeBSD_kernel__)
1368 static int tap_open(char *ifname, int ifname_size)
1369 {
1370     int fd;
1371     char *dev;
1372     struct stat s;
1373
1374     TFR(fd = open("/dev/tap", O_RDWR));
1375     if (fd < 0) {
1376         fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n");
1377         return -1;
1378     }
1379
1380     fstat(fd, &s);
1381     dev = devname(s.st_rdev, S_IFCHR);
1382     pstrcpy(ifname, ifname_size, dev);
1383
1384     fcntl(fd, F_SETFL, O_NONBLOCK);
1385     return fd;
1386 }
1387 #elif defined(__sun__)
1388 #define TUNNEWPPA       (('T'<<16) | 0x0001)
1389 /*
1390  * Allocate TAP device, returns opened fd.
1391  * Stores dev name in the first arg(must be large enough).
1392  */
1393 static int tap_alloc(char *dev, size_t dev_size)
1394 {
1395     int tap_fd, if_fd, ppa = -1;
1396     static int ip_fd = 0;
1397     char *ptr;
1398
1399     static int arp_fd = 0;
1400     int ip_muxid, arp_muxid;
1401     struct strioctl  strioc_if, strioc_ppa;
1402     int link_type = I_PLINK;;
1403     struct lifreq ifr;
1404     char actual_name[32] = "";
1405
1406     memset(&ifr, 0x0, sizeof(ifr));
1407
1408     if( *dev ){
1409        ptr = dev;
1410        while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
1411        ppa = atoi(ptr);
1412     }
1413
1414     /* Check if IP device was opened */
1415     if( ip_fd )
1416        close(ip_fd);
1417
1418     TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
1419     if (ip_fd < 0) {
1420        syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)");
1421        return -1;
1422     }
1423
1424     TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
1425     if (tap_fd < 0) {
1426        syslog(LOG_ERR, "Can't open /dev/tap");
1427        return -1;
1428     }
1429
1430     /* Assign a new PPA and get its unit number. */
1431     strioc_ppa.ic_cmd = TUNNEWPPA;
1432     strioc_ppa.ic_timout = 0;
1433     strioc_ppa.ic_len = sizeof(ppa);
1434     strioc_ppa.ic_dp = (char *)&ppa;
1435     if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
1436        syslog (LOG_ERR, "Can't assign new interface");
1437
1438     TFR(if_fd = open("/dev/tap", O_RDWR, 0));
1439     if (if_fd < 0) {
1440        syslog(LOG_ERR, "Can't open /dev/tap (2)");
1441        return -1;
1442     }
1443     if(ioctl(if_fd, I_PUSH, "ip") < 0){
1444        syslog(LOG_ERR, "Can't push IP module");
1445        return -1;
1446     }
1447
1448     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
1449         syslog(LOG_ERR, "Can't get flags\n");
1450
1451     snprintf (actual_name, 32, "tap%d", ppa);
1452     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
1453
1454     ifr.lifr_ppa = ppa;
1455     /* Assign ppa according to the unit number returned by tun device */
1456
1457     if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
1458         syslog (LOG_ERR, "Can't set PPA %d", ppa);
1459     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
1460         syslog (LOG_ERR, "Can't get flags\n");
1461     /* Push arp module to if_fd */
1462     if (ioctl (if_fd, I_PUSH, "arp") < 0)
1463         syslog (LOG_ERR, "Can't push ARP module (2)");
1464
1465     /* Push arp module to ip_fd */
1466     if (ioctl (ip_fd, I_POP, NULL) < 0)
1467         syslog (LOG_ERR, "I_POP failed\n");
1468     if (ioctl (ip_fd, I_PUSH, "arp") < 0)
1469         syslog (LOG_ERR, "Can't push ARP module (3)\n");
1470     /* Open arp_fd */
1471     TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
1472     if (arp_fd < 0)
1473        syslog (LOG_ERR, "Can't open %s\n", "/dev/tap");
1474
1475     /* Set ifname to arp */
1476     strioc_if.ic_cmd = SIOCSLIFNAME;
1477     strioc_if.ic_timout = 0;
1478     strioc_if.ic_len = sizeof(ifr);
1479     strioc_if.ic_dp = (char *)&ifr;
1480     if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
1481         syslog (LOG_ERR, "Can't set ifname to arp\n");
1482     }
1483
1484     if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
1485        syslog(LOG_ERR, "Can't link TAP device to IP");
1486        return -1;
1487     }
1488
1489     if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
1490         syslog (LOG_ERR, "Can't link TAP device to ARP");
1491
1492     close (if_fd);
1493
1494     memset(&ifr, 0x0, sizeof(ifr));
1495     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
1496     ifr.lifr_ip_muxid  = ip_muxid;
1497     ifr.lifr_arp_muxid = arp_muxid;
1498
1499     if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
1500     {
1501       ioctl (ip_fd, I_PUNLINK , arp_muxid);
1502       ioctl (ip_fd, I_PUNLINK, ip_muxid);
1503       syslog (LOG_ERR, "Can't set multiplexor id");
1504     }
1505
1506     snprintf(dev, dev_size, "tap%d", ppa);
1507     return tap_fd;
1508 }
1509
1510 static int tap_open(char *ifname, int ifname_size)
1511 {
1512     char  dev[10]="";
1513     int fd;
1514     if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){
1515        fprintf(stderr, "Cannot allocate TAP device\n");
1516        return -1;
1517     }
1518     pstrcpy(ifname, ifname_size, dev);
1519     fcntl(fd, F_SETFL, O_NONBLOCK);
1520     return fd;
1521 }
1522 #elif defined (_AIX)
1523 static int tap_open(char *ifname, int ifname_size)
1524 {
1525     fprintf (stderr, "no tap on AIX\n");
1526     return -1;
1527 }
1528 #else
1529 static int tap_open(char *ifname, int ifname_size)
1530 {
1531     struct ifreq ifr;
1532     int fd, ret;
1533
1534     TFR(fd = open("/dev/net/tun", O_RDWR));
1535     if (fd < 0) {
1536         fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n");
1537         return -1;
1538     }
1539     memset(&ifr, 0, sizeof(ifr));
1540     ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
1541     if (ifname[0] != '\0')
1542         pstrcpy(ifr.ifr_name, IFNAMSIZ, ifname);
1543     else
1544         pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d");
1545     ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
1546     if (ret != 0) {
1547         fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n");
1548         close(fd);
1549         return -1;
1550     }
1551     pstrcpy(ifname, ifname_size, ifr.ifr_name);
1552     fcntl(fd, F_SETFL, O_NONBLOCK);
1553     return fd;
1554 }
1555 #endif
1556
1557 static int launch_script(const char *setup_script, const char *ifname, int fd)
1558 {
1559     sigset_t oldmask, mask;
1560     int pid, status;
1561     char *args[3];
1562     char **parg;
1563
1564     sigemptyset(&mask);
1565     sigaddset(&mask, SIGCHLD);
1566     sigprocmask(SIG_BLOCK, &mask, &oldmask);
1567
1568     /* try to launch network script */
1569     pid = fork();
1570     if (pid == 0) {
1571         int open_max = sysconf(_SC_OPEN_MAX), i;
1572
1573         for (i = 0; i < open_max; i++) {
1574             if (i != STDIN_FILENO &&
1575                 i != STDOUT_FILENO &&
1576                 i != STDERR_FILENO &&
1577                 i != fd) {
1578                 close(i);
1579             }
1580         }
1581         parg = args;
1582         *parg++ = (char *)setup_script;
1583         *parg++ = (char *)ifname;
1584         *parg++ = NULL;
1585         execv(setup_script, args);
1586         _exit(1);
1587     } else if (pid > 0) {
1588         while (waitpid(pid, &status, 0) != pid) {
1589             /* loop */
1590         }
1591         sigprocmask(SIG_SETMASK, &oldmask, NULL);
1592
1593         if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
1594             return 0;
1595         }
1596     }
1597     fprintf(stderr, "%s: could not launch network script\n", setup_script);
1598     return -1;
1599 }
1600
1601 static TAPState *net_tap_init(VLANState *vlan, const char *model,
1602                               const char *name, const char *ifname1,
1603                               const char *setup_script, const char *down_script)
1604 {
1605     TAPState *s;
1606     int fd;
1607     char ifname[128];
1608
1609     if (ifname1 != NULL)
1610         pstrcpy(ifname, sizeof(ifname), ifname1);
1611     else
1612         ifname[0] = '\0';
1613     TFR(fd = tap_open(ifname, sizeof(ifname)));
1614     if (fd < 0)
1615         return NULL;
1616
1617     if (!setup_script || !strcmp(setup_script, "no"))
1618         setup_script = "";
1619     if (setup_script[0] != '\0' &&
1620         launch_script(setup_script, ifname, fd)) {
1621         return NULL;
1622     }
1623     s = net_tap_fd_init(vlan, model, name, fd);
1624     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1625              "ifname=%s,script=%s,downscript=%s",
1626              ifname, setup_script, down_script);
1627     if (down_script && strcmp(down_script, "no")) {
1628         snprintf(s->down_script, sizeof(s->down_script), "%s", down_script);
1629         snprintf(s->down_script_arg, sizeof(s->down_script_arg), "%s", ifname);
1630     }
1631     return s;
1632 }
1633
1634 #endif /* !_WIN32 */
1635
1636 #if defined(CONFIG_VDE)
1637 typedef struct VDEState {
1638     VLANClientState *vc;
1639     VDECONN *vde;
1640 } VDEState;
1641
1642 static void vde_to_qemu(void *opaque)
1643 {
1644     VDEState *s = opaque;
1645     uint8_t buf[4096];
1646     int size;
1647
1648     size = vde_recv(s->vde, (char *)buf, sizeof(buf), 0);
1649     if (size > 0) {
1650         qemu_send_packet(s->vc, buf, size);
1651     }
1652 }
1653
1654 static ssize_t vde_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1655 {
1656     VDEState *s = vc->opaque;
1657     ssize_t ret;
1658
1659     do {
1660       ret = vde_send(s->vde, (const char *)buf, size, 0);
1661     } while (ret < 0 && errno == EINTR);
1662
1663     return ret;
1664 }
1665
1666 static void vde_cleanup(VLANClientState *vc)
1667 {
1668     VDEState *s = vc->opaque;
1669     qemu_set_fd_handler(vde_datafd(s->vde), NULL, NULL, NULL);
1670     vde_close(s->vde);
1671     qemu_free(s);
1672 }
1673
1674 static int net_vde_init(VLANState *vlan, const char *model,
1675                         const char *name, const char *sock,
1676                         int port, const char *group, int mode)
1677 {
1678     VDEState *s;
1679     char *init_group = strlen(group) ? (char *)group : NULL;
1680     char *init_sock = strlen(sock) ? (char *)sock : NULL;
1681
1682     struct vde_open_args args = {
1683         .port = port,
1684         .group = init_group,
1685         .mode = mode,
1686     };
1687
1688     s = qemu_mallocz(sizeof(VDEState));
1689     s->vde = vde_open(init_sock, (char *)"QEMU", &args);
1690     if (!s->vde){
1691         free(s);
1692         return -1;
1693     }
1694     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, vde_receive,
1695                                  NULL, vde_cleanup, s);
1696     qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
1697     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "sock=%s,fd=%d",
1698              sock, vde_datafd(s->vde));
1699     return 0;
1700 }
1701 #endif
1702
1703 /* network connection */
1704 typedef struct NetSocketState {
1705     VLANClientState *vc;
1706     int fd;
1707     int state; /* 0 = getting length, 1 = getting data */
1708     unsigned int index;
1709     unsigned int packet_len;
1710     uint8_t buf[4096];
1711     struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
1712 } NetSocketState;
1713
1714 typedef struct NetSocketListenState {
1715     VLANState *vlan;
1716     char *model;
1717     char *name;
1718     int fd;
1719 } NetSocketListenState;
1720
1721 /* XXX: we consider we can send the whole packet without blocking */
1722 static ssize_t net_socket_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1723 {
1724     NetSocketState *s = vc->opaque;
1725     uint32_t len;
1726     len = htonl(size);
1727
1728     send_all(s->fd, (const uint8_t *)&len, sizeof(len));
1729     return send_all(s->fd, buf, size);
1730 }
1731
1732 static ssize_t net_socket_receive_dgram(VLANClientState *vc, const uint8_t *buf, size_t size)
1733 {
1734     NetSocketState *s = vc->opaque;
1735
1736     return sendto(s->fd, (const void *)buf, size, 0,
1737                   (struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst));
1738 }
1739
1740 static void net_socket_send(void *opaque)
1741 {
1742     NetSocketState *s = opaque;
1743     int size, err;
1744     unsigned l;
1745     uint8_t buf1[4096];
1746     const uint8_t *buf;
1747
1748     size = recv(s->fd, (void *)buf1, sizeof(buf1), 0);
1749     if (size < 0) {
1750         err = socket_error();
1751         if (err != EWOULDBLOCK)
1752             goto eoc;
1753     } else if (size == 0) {
1754         /* end of connection */
1755     eoc:
1756         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1757         closesocket(s->fd);
1758         return;
1759     }
1760     buf = buf1;
1761     while (size > 0) {
1762         /* reassemble a packet from the network */
1763         switch(s->state) {
1764         case 0:
1765             l = 4 - s->index;
1766             if (l > size)
1767                 l = size;
1768             memcpy(s->buf + s->index, buf, l);
1769             buf += l;
1770             size -= l;
1771             s->index += l;
1772             if (s->index == 4) {
1773                 /* got length */
1774                 s->packet_len = ntohl(*(uint32_t *)s->buf);
1775                 s->index = 0;
1776                 s->state = 1;
1777             }
1778             break;
1779         case 1:
1780             l = s->packet_len - s->index;
1781             if (l > size)
1782                 l = size;
1783             if (s->index + l <= sizeof(s->buf)) {
1784                 memcpy(s->buf + s->index, buf, l);
1785             } else {
1786                 fprintf(stderr, "serious error: oversized packet received,"
1787                     "connection terminated.\n");
1788                 s->state = 0;
1789                 goto eoc;
1790             }
1791
1792             s->index += l;
1793             buf += l;
1794             size -= l;
1795             if (s->index >= s->packet_len) {
1796                 qemu_send_packet(s->vc, s->buf, s->packet_len);
1797                 s->index = 0;
1798                 s->state = 0;
1799             }
1800             break;
1801         }
1802     }
1803 }
1804
1805 static void net_socket_send_dgram(void *opaque)
1806 {
1807     NetSocketState *s = opaque;
1808     int size;
1809
1810     size = recv(s->fd, (void *)s->buf, sizeof(s->buf), 0);
1811     if (size < 0)
1812         return;
1813     if (size == 0) {
1814         /* end of connection */
1815         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1816         return;
1817     }
1818     qemu_send_packet(s->vc, s->buf, size);
1819 }
1820
1821 static int net_socket_mcast_create(struct sockaddr_in *mcastaddr)
1822 {
1823     struct ip_mreq imr;
1824     int fd;
1825     int val, ret;
1826     if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
1827         fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n",
1828                 inet_ntoa(mcastaddr->sin_addr),
1829                 (int)ntohl(mcastaddr->sin_addr.s_addr));
1830         return -1;
1831
1832     }
1833     fd = socket(PF_INET, SOCK_DGRAM, 0);
1834     if (fd < 0) {
1835         perror("socket(PF_INET, SOCK_DGRAM)");
1836         return -1;
1837     }
1838
1839     val = 1;
1840     ret=setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
1841                    (const char *)&val, sizeof(val));
1842     if (ret < 0) {
1843         perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
1844         goto fail;
1845     }
1846
1847     ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
1848     if (ret < 0) {
1849         perror("bind");
1850         goto fail;
1851     }
1852
1853     /* Add host to multicast group */
1854     imr.imr_multiaddr = mcastaddr->sin_addr;
1855     imr.imr_interface.s_addr = htonl(INADDR_ANY);
1856
1857     ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1858                      (const char *)&imr, sizeof(struct ip_mreq));
1859     if (ret < 0) {
1860         perror("setsockopt(IP_ADD_MEMBERSHIP)");
1861         goto fail;
1862     }
1863
1864     /* Force mcast msgs to loopback (eg. several QEMUs in same host */
1865     val = 1;
1866     ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1867                    (const char *)&val, sizeof(val));
1868     if (ret < 0) {
1869         perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
1870         goto fail;
1871     }
1872
1873     socket_set_nonblock(fd);
1874     return fd;
1875 fail:
1876     if (fd >= 0)
1877         closesocket(fd);
1878     return -1;
1879 }
1880
1881 static void net_socket_cleanup(VLANClientState *vc)
1882 {
1883     NetSocketState *s = vc->opaque;
1884     qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1885     close(s->fd);
1886     qemu_free(s);
1887 }
1888
1889 static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
1890                                                 const char *model,
1891                                                 const char *name,
1892                                                 int fd, int is_connected)
1893 {
1894     struct sockaddr_in saddr;
1895     int newfd;
1896     socklen_t saddr_len;
1897     NetSocketState *s;
1898
1899     /* fd passed: multicast: "learn" dgram_dst address from bound address and save it
1900      * Because this may be "shared" socket from a "master" process, datagrams would be recv()
1901      * by ONLY ONE process: we must "clone" this dgram socket --jjo
1902      */
1903
1904     if (is_connected) {
1905         if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
1906             /* must be bound */
1907             if (saddr.sin_addr.s_addr==0) {
1908                 fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, cannot setup multicast dst addr\n",
1909                         fd);
1910                 return NULL;
1911             }
1912             /* clone dgram socket */
1913             newfd = net_socket_mcast_create(&saddr);
1914             if (newfd < 0) {
1915                 /* error already reported by net_socket_mcast_create() */
1916                 close(fd);
1917                 return NULL;
1918             }
1919             /* clone newfd to fd, close newfd */
1920             dup2(newfd, fd);
1921             close(newfd);
1922
1923         } else {
1924             fprintf(stderr, "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
1925                     fd, strerror(errno));
1926             return NULL;
1927         }
1928     }
1929
1930     s = qemu_mallocz(sizeof(NetSocketState));
1931     s->fd = fd;
1932
1933     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, net_socket_receive_dgram,
1934                                  NULL, net_socket_cleanup, s);
1935     qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s);
1936
1937     /* mcast: save bound address as dst */
1938     if (is_connected) s->dgram_dst=saddr;
1939
1940     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1941             "socket: fd=%d (%s mcast=%s:%d)",
1942             fd, is_connected? "cloned" : "",
1943             inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1944     return s;
1945 }
1946
1947 static void net_socket_connect(void *opaque)
1948 {
1949     NetSocketState *s = opaque;
1950     qemu_set_fd_handler(s->fd, net_socket_send, NULL, s);
1951 }
1952
1953 static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
1954                                                  const char *model,
1955                                                  const char *name,
1956                                                  int fd, int is_connected)
1957 {
1958     NetSocketState *s;
1959     s = qemu_mallocz(sizeof(NetSocketState));
1960     s->fd = fd;
1961     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, net_socket_receive,
1962                                  NULL, net_socket_cleanup, s);
1963     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1964              "socket: fd=%d", fd);
1965     if (is_connected) {
1966         net_socket_connect(s);
1967     } else {
1968         qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
1969     }
1970     return s;
1971 }
1972
1973 static NetSocketState *net_socket_fd_init(VLANState *vlan,
1974                                           const char *model, const char *name,
1975                                           int fd, int is_connected)
1976 {
1977     int so_type=-1, optlen=sizeof(so_type);
1978
1979     if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type,
1980         (socklen_t *)&optlen)< 0) {
1981         fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n", fd);
1982         return NULL;
1983     }
1984     switch(so_type) {
1985     case SOCK_DGRAM:
1986         return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected);
1987     case SOCK_STREAM:
1988         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1989     default:
1990         /* who knows ... this could be a eg. a pty, do warn and continue as stream */
1991         fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
1992         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1993     }
1994     return NULL;
1995 }
1996
1997 static void net_socket_accept(void *opaque)
1998 {
1999     NetSocketListenState *s = opaque;
2000     NetSocketState *s1;
2001     struct sockaddr_in saddr;
2002     socklen_t len;
2003     int fd;
2004
2005     for(;;) {
2006         len = sizeof(saddr);
2007         fd = accept(s->fd, (struct sockaddr *)&saddr, &len);
2008         if (fd < 0 && errno != EINTR) {
2009             return;
2010         } else if (fd >= 0) {
2011             break;
2012         }
2013     }
2014     s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1);
2015     if (!s1) {
2016         closesocket(fd);
2017     } else {
2018         snprintf(s1->vc->info_str, sizeof(s1->vc->info_str),
2019                  "socket: connection from %s:%d",
2020                  inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2021     }
2022 }
2023
2024 static int net_socket_listen_init(VLANState *vlan,
2025                                   const char *model,
2026                                   const char *name,
2027                                   const char *host_str)
2028 {
2029     NetSocketListenState *s;
2030     int fd, val, ret;
2031     struct sockaddr_in saddr;
2032
2033     if (parse_host_port(&saddr, host_str) < 0)
2034         return -1;
2035
2036     s = qemu_mallocz(sizeof(NetSocketListenState));
2037
2038     fd = socket(PF_INET, SOCK_STREAM, 0);
2039     if (fd < 0) {
2040         perror("socket");
2041         return -1;
2042     }
2043     socket_set_nonblock(fd);
2044
2045     /* allow fast reuse */
2046     val = 1;
2047     setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));
2048
2049     ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
2050     if (ret < 0) {
2051         perror("bind");
2052         return -1;
2053     }
2054     ret = listen(fd, 0);
2055     if (ret < 0) {
2056         perror("listen");
2057         return -1;
2058     }
2059     s->vlan = vlan;
2060     s->model = strdup(model);
2061     s->name = name ? strdup(name) : NULL;
2062     s->fd = fd;
2063     qemu_set_fd_handler(fd, net_socket_accept, NULL, s);
2064     return 0;
2065 }
2066
2067 static int net_socket_connect_init(VLANState *vlan,
2068                                    const char *model,
2069                                    const char *name,
2070                                    const char *host_str)
2071 {
2072     NetSocketState *s;
2073     int fd, connected, ret, err;
2074     struct sockaddr_in saddr;
2075
2076     if (parse_host_port(&saddr, host_str) < 0)
2077         return -1;
2078
2079     fd = socket(PF_INET, SOCK_STREAM, 0);
2080     if (fd < 0) {
2081         perror("socket");
2082         return -1;
2083     }
2084     socket_set_nonblock(fd);
2085
2086     connected = 0;
2087     for(;;) {
2088         ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
2089         if (ret < 0) {
2090             err = socket_error();
2091             if (err == EINTR || err == EWOULDBLOCK) {
2092             } else if (err == EINPROGRESS) {
2093                 break;
2094 #ifdef _WIN32
2095             } else if (err == WSAEALREADY) {
2096                 break;
2097 #endif
2098             } else {
2099                 perror("connect");
2100                 closesocket(fd);
2101                 return -1;
2102             }
2103         } else {
2104             connected = 1;
2105             break;
2106         }
2107     }
2108     s = net_socket_fd_init(vlan, model, name, fd, connected);
2109     if (!s)
2110         return -1;
2111     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2112              "socket: connect to %s:%d",
2113              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2114     return 0;
2115 }
2116
2117 static int net_socket_mcast_init(VLANState *vlan,
2118                                  const char *model,
2119                                  const char *name,
2120                                  const char *host_str)
2121 {
2122     NetSocketState *s;
2123     int fd;
2124     struct sockaddr_in saddr;
2125
2126     if (parse_host_port(&saddr, host_str) < 0)
2127         return -1;
2128
2129
2130     fd = net_socket_mcast_create(&saddr);
2131     if (fd < 0)
2132         return -1;
2133
2134     s = net_socket_fd_init(vlan, model, name, fd, 0);
2135     if (!s)
2136         return -1;
2137
2138     s->dgram_dst = saddr;
2139
2140     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2141              "socket: mcast=%s:%d",
2142              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2143     return 0;
2144
2145 }
2146
2147 typedef struct DumpState {
2148     VLANClientState *pcap_vc;
2149     int fd;
2150     int pcap_caplen;
2151 } DumpState;
2152
2153 #define PCAP_MAGIC 0xa1b2c3d4
2154
2155 struct pcap_file_hdr {
2156     uint32_t magic;
2157     uint16_t version_major;
2158     uint16_t version_minor;
2159     int32_t thiszone;
2160     uint32_t sigfigs;
2161     uint32_t snaplen;
2162     uint32_t linktype;
2163 };
2164
2165 struct pcap_sf_pkthdr {
2166     struct {
2167         int32_t tv_sec;
2168         int32_t tv_usec;
2169     } ts;
2170     uint32_t caplen;
2171     uint32_t len;
2172 };
2173
2174 static ssize_t dump_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
2175 {
2176     DumpState *s = vc->opaque;
2177     struct pcap_sf_pkthdr hdr;
2178     int64_t ts;
2179     int caplen;
2180
2181     /* Early return in case of previous error. */
2182     if (s->fd < 0) {
2183         return size;
2184     }
2185
2186     ts = muldiv64(qemu_get_clock(vm_clock), 1000000, ticks_per_sec);
2187     caplen = size > s->pcap_caplen ? s->pcap_caplen : size;
2188
2189     hdr.ts.tv_sec = ts / 1000000;
2190     hdr.ts.tv_usec = ts % 1000000;
2191     hdr.caplen = caplen;
2192     hdr.len = size;
2193     if (write(s->fd, &hdr, sizeof(hdr)) != sizeof(hdr) ||
2194         write(s->fd, buf, caplen) != caplen) {
2195         qemu_log("-net dump write error - stop dump\n");
2196         close(s->fd);
2197         s->fd = -1;
2198     }
2199
2200     return size;
2201 }
2202
2203 static void net_dump_cleanup(VLANClientState *vc)
2204 {
2205     DumpState *s = vc->opaque;
2206
2207     close(s->fd);
2208     qemu_free(s);
2209 }
2210
2211 static int net_dump_init(Monitor *mon, VLANState *vlan, const char *device,
2212                          const char *name, const char *filename, int len)
2213 {
2214     struct pcap_file_hdr hdr;
2215     DumpState *s;
2216
2217     s = qemu_malloc(sizeof(DumpState));
2218
2219     s->fd = open(filename, O_CREAT | O_WRONLY | O_BINARY, 0644);
2220     if (s->fd < 0) {
2221         config_error(mon, "-net dump: can't open %s\n", filename);
2222         return -1;
2223     }
2224
2225     s->pcap_caplen = len;
2226
2227     hdr.magic = PCAP_MAGIC;
2228     hdr.version_major = 2;
2229     hdr.version_minor = 4;
2230     hdr.thiszone = 0;
2231     hdr.sigfigs = 0;
2232     hdr.snaplen = s->pcap_caplen;
2233     hdr.linktype = 1;
2234
2235     if (write(s->fd, &hdr, sizeof(hdr)) < sizeof(hdr)) {
2236         config_error(mon, "-net dump write error: %s\n", strerror(errno));
2237         close(s->fd);
2238         qemu_free(s);
2239         return -1;
2240     }
2241
2242     s->pcap_vc = qemu_new_vlan_client(vlan, device, name, NULL, dump_receive, NULL,
2243                                       net_dump_cleanup, s);
2244     snprintf(s->pcap_vc->info_str, sizeof(s->pcap_vc->info_str),
2245              "dump to %s (len=%d)", filename, len);
2246     return 0;
2247 }
2248
2249 /* find or alloc a new VLAN */
2250 VLANState *qemu_find_vlan(int id)
2251 {
2252     VLANState **pvlan, *vlan;
2253     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2254         if (vlan->id == id)
2255             return vlan;
2256     }
2257     vlan = qemu_mallocz(sizeof(VLANState));
2258     vlan->id = id;
2259     vlan->next = NULL;
2260     pvlan = &first_vlan;
2261     while (*pvlan != NULL)
2262         pvlan = &(*pvlan)->next;
2263     *pvlan = vlan;
2264     return vlan;
2265 }
2266
2267 static int nic_get_free_idx(void)
2268 {
2269     int index;
2270
2271     for (index = 0; index < MAX_NICS; index++)
2272         if (!nd_table[index].used)
2273             return index;
2274     return -1;
2275 }
2276
2277 void qemu_check_nic_model(NICInfo *nd, const char *model)
2278 {
2279     const char *models[2];
2280
2281     models[0] = model;
2282     models[1] = NULL;
2283
2284     qemu_check_nic_model_list(nd, models, model);
2285 }
2286
2287 void qemu_check_nic_model_list(NICInfo *nd, const char * const *models,
2288                                const char *default_model)
2289 {
2290     int i, exit_status = 0;
2291
2292     if (!nd->model)
2293         nd->model = strdup(default_model);
2294
2295     if (strcmp(nd->model, "?") != 0) {
2296         for (i = 0 ; models[i]; i++)
2297             if (strcmp(nd->model, models[i]) == 0)
2298                 return;
2299
2300         fprintf(stderr, "qemu: Unsupported NIC model: %s\n", nd->model);
2301         exit_status = 1;
2302     }
2303
2304     fprintf(stderr, "qemu: Supported NIC models: ");
2305     for (i = 0 ; models[i]; i++)
2306         fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
2307
2308     exit(exit_status);
2309 }
2310
2311 int net_client_init(Monitor *mon, const char *device, const char *p)
2312 {
2313     char buf[1024];
2314     int vlan_id, ret;
2315     VLANState *vlan;
2316     char *name = NULL;
2317
2318     vlan_id = 0;
2319     if (get_param_value(buf, sizeof(buf), "vlan", p)) {
2320         vlan_id = strtol(buf, NULL, 0);
2321     }
2322     vlan = qemu_find_vlan(vlan_id);
2323
2324     if (get_param_value(buf, sizeof(buf), "name", p)) {
2325         name = qemu_strdup(buf);
2326     }
2327     if (!strcmp(device, "nic")) {
2328         static const char * const nic_params[] = {
2329             "vlan", "name", "macaddr", "model", "addr", "vectors", NULL
2330         };
2331         NICInfo *nd;
2332         uint8_t *macaddr;
2333         int idx = nic_get_free_idx();
2334
2335         if (check_params(buf, sizeof(buf), nic_params, p) < 0) {
2336             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2337             ret = -1;
2338             goto out;
2339         }
2340         if (idx == -1 || nb_nics >= MAX_NICS) {
2341             config_error(mon, "Too Many NICs\n");
2342             ret = -1;
2343             goto out;
2344         }
2345         nd = &nd_table[idx];
2346         macaddr = nd->macaddr;
2347         macaddr[0] = 0x52;
2348         macaddr[1] = 0x54;
2349         macaddr[2] = 0x00;
2350         macaddr[3] = 0x12;
2351         macaddr[4] = 0x34;
2352         macaddr[5] = 0x56 + idx;
2353
2354         if (get_param_value(buf, sizeof(buf), "macaddr", p)) {
2355             if (parse_macaddr(macaddr, buf) < 0) {
2356                 config_error(mon, "invalid syntax for ethernet address\n");
2357                 ret = -1;
2358                 goto out;
2359             }
2360         }
2361         if (get_param_value(buf, sizeof(buf), "model", p)) {
2362             nd->model = strdup(buf);
2363         }
2364         if (get_param_value(buf, sizeof(buf), "addr", p)) {
2365             nd->devaddr = strdup(buf);
2366         }
2367         nd->nvectors = NIC_NVECTORS_UNSPECIFIED;
2368         if (get_param_value(buf, sizeof(buf), "vectors", p)) {
2369             char *endptr;
2370             long vectors = strtol(buf, &endptr, 0);
2371             if (*endptr) {
2372                 config_error(mon, "invalid syntax for # of vectors\n");
2373                 ret = -1;
2374                 goto out;
2375             }
2376             if (vectors < 0 || vectors > 0x7ffffff) {
2377                 config_error(mon, "invalid # of vectors\n");
2378                 ret = -1;
2379                 goto out;
2380             }
2381             nd->nvectors = vectors;
2382         }
2383         nd->vlan = vlan;
2384         nd->name = name;
2385         nd->used = 1;
2386         name = NULL;
2387         nb_nics++;
2388         vlan->nb_guest_devs++;
2389         ret = idx;
2390     } else
2391     if (!strcmp(device, "none")) {
2392         if (*p != '\0') {
2393             config_error(mon, "'none' takes no parameters\n");
2394             ret = -1;
2395             goto out;
2396         }
2397         /* does nothing. It is needed to signal that no network cards
2398            are wanted */
2399         ret = 0;
2400     } else
2401 #ifdef CONFIG_SLIRP
2402     if (!strcmp(device, "user")) {
2403         static const char * const slirp_params[] = {
2404             "vlan", "name", "hostname", "restrict", "ip", "net", "host",
2405             "tftp", "bootfile", "dhcpstart", "dns", "smb", "smbserver",
2406             "hostfwd", "guestfwd", NULL
2407         };
2408         struct slirp_config_str *config;
2409         int restricted = 0;
2410         char *vnet = NULL;
2411         char *vhost = NULL;
2412         char *vhostname = NULL;
2413         char *tftp_export = NULL;
2414         char *bootfile = NULL;
2415         char *vdhcp_start = NULL;
2416         char *vnamesrv = NULL;
2417         char *smb_export = NULL;
2418         char *vsmbsrv = NULL;
2419         const char *q;
2420
2421         if (check_params(buf, sizeof(buf), slirp_params, p) < 0) {
2422             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2423             ret = -1;
2424             goto out;
2425         }
2426         if (get_param_value(buf, sizeof(buf), "ip", p)) {
2427             /* emulate legacy parameter */
2428             vnet = qemu_malloc(strlen(buf) + strlen("/24") + 1);
2429             strcpy(vnet, buf);
2430             strcat(vnet, "/24");
2431         }
2432         if (get_param_value(buf, sizeof(buf), "net", p)) {
2433             vnet = qemu_strdup(buf);
2434         }
2435         if (get_param_value(buf, sizeof(buf), "host", p)) {
2436             vhost = qemu_strdup(buf);
2437         }
2438         if (get_param_value(buf, sizeof(buf), "hostname", p)) {
2439             vhostname = qemu_strdup(buf);
2440         }
2441         if (get_param_value(buf, sizeof(buf), "restrict", p)) {
2442             restricted = (buf[0] == 'y') ? 1 : 0;
2443         }
2444         if (get_param_value(buf, sizeof(buf), "dhcpstart", p)) {
2445             vdhcp_start = qemu_strdup(buf);
2446         }
2447         if (get_param_value(buf, sizeof(buf), "dns", p)) {
2448             vnamesrv = qemu_strdup(buf);
2449         }
2450         if (get_param_value(buf, sizeof(buf), "tftp", p)) {
2451             tftp_export = qemu_strdup(buf);
2452         }
2453         if (get_param_value(buf, sizeof(buf), "bootfile", p)) {
2454             bootfile = qemu_strdup(buf);
2455         }
2456         if (get_param_value(buf, sizeof(buf), "smb", p)) {
2457             smb_export = qemu_strdup(buf);
2458             if (get_param_value(buf, sizeof(buf), "smbserver", p)) {
2459                 vsmbsrv = qemu_strdup(buf);
2460             }
2461         }
2462         q = p;
2463         while (1) {
2464             config = qemu_malloc(sizeof(*config));
2465             if (!get_next_param_value(config->str, sizeof(config->str),
2466                                       "hostfwd", &q)) {
2467                 break;
2468             }
2469             config->flags = SLIRP_CFG_HOSTFWD;
2470             config->next = slirp_configs;
2471             slirp_configs = config;
2472             config = NULL;
2473         }
2474         q = p;
2475         while (1) {
2476             config = qemu_malloc(sizeof(*config));
2477             if (!get_next_param_value(config->str, sizeof(config->str),
2478                                       "guestfwd", &q)) {
2479                 break;
2480             }
2481             config->flags = 0;
2482             config->next = slirp_configs;
2483             slirp_configs = config;
2484             config = NULL;
2485         }
2486         qemu_free(config);
2487         vlan->nb_host_devs++;
2488         ret = net_slirp_init(mon, vlan, device, name, restricted, vnet, vhost,
2489                              vhostname, tftp_export, bootfile, vdhcp_start,
2490                              vnamesrv, smb_export, vsmbsrv);
2491         qemu_free(vnet);
2492         qemu_free(vhost);
2493         qemu_free(vhostname);
2494         qemu_free(tftp_export);
2495         qemu_free(bootfile);
2496         qemu_free(vdhcp_start);
2497         qemu_free(vnamesrv);
2498         qemu_free(smb_export);
2499         qemu_free(vsmbsrv);
2500     } else if (!strcmp(device, "channel")) {
2501         if (!slirp_inited) {
2502             struct slirp_config_str *config;
2503
2504             config = qemu_malloc(sizeof(*config));
2505             pstrcpy(config->str, sizeof(config->str), p);
2506             config->flags = SLIRP_CFG_LEGACY;
2507             config->next = slirp_configs;
2508             slirp_configs = config;
2509         } else {
2510             slirp_guestfwd(mon, p, 1);
2511         }
2512         ret = 0;
2513     } else
2514 #endif
2515 #ifdef _WIN32
2516     if (!strcmp(device, "tap")) {
2517         static const char * const tap_params[] = {
2518             "vlan", "name", "ifname", NULL
2519         };
2520         char ifname[64];
2521
2522         if (check_params(buf, sizeof(buf), tap_params, p) < 0) {
2523             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2524             ret = -1;
2525             goto out;
2526         }
2527         if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
2528             config_error(mon, "tap: no interface name\n");
2529             ret = -1;
2530             goto out;
2531         }
2532         vlan->nb_host_devs++;
2533         ret = tap_win32_init(vlan, device, name, ifname);
2534     } else
2535 #elif defined (_AIX)
2536 #else
2537     if (!strcmp(device, "tap")) {
2538         char ifname[64], chkbuf[64];
2539         char setup_script[1024], down_script[1024];
2540         TAPState *s;
2541         int fd;
2542         vlan->nb_host_devs++;
2543         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
2544             static const char * const fd_params[] = {
2545                 "vlan", "name", "fd", "sndbuf", NULL
2546             };
2547             if (check_params(chkbuf, sizeof(chkbuf), fd_params, p) < 0) {
2548                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2549                 ret = -1;
2550                 goto out;
2551             }
2552             fd = strtol(buf, NULL, 0);
2553             fcntl(fd, F_SETFL, O_NONBLOCK);
2554             s = net_tap_fd_init(vlan, device, name, fd);
2555         } else {
2556             static const char * const tap_params[] = {
2557                 "vlan", "name", "ifname", "script", "downscript", "sndbuf", NULL
2558             };
2559             if (check_params(chkbuf, sizeof(chkbuf), tap_params, p) < 0) {
2560                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2561                 ret = -1;
2562                 goto out;
2563             }
2564             if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
2565                 ifname[0] = '\0';
2566             }
2567             if (get_param_value(setup_script, sizeof(setup_script), "script", p) == 0) {
2568                 pstrcpy(setup_script, sizeof(setup_script), DEFAULT_NETWORK_SCRIPT);
2569             }
2570             if (get_param_value(down_script, sizeof(down_script), "downscript", p) == 0) {
2571                 pstrcpy(down_script, sizeof(down_script), DEFAULT_NETWORK_DOWN_SCRIPT);
2572             }
2573             s = net_tap_init(vlan, device, name, ifname, setup_script, down_script);
2574         }
2575         if (s != NULL) {
2576             if (get_param_value(buf, sizeof(buf), "sndbuf", p)) {
2577                 tap_set_sndbuf(s, atoi(buf), mon);
2578             }
2579             ret = 0;
2580         } else {
2581             ret = -1;
2582         }
2583     } else
2584 #endif
2585     if (!strcmp(device, "socket")) {
2586         char chkbuf[64];
2587         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
2588             static const char * const fd_params[] = {
2589                 "vlan", "name", "fd", NULL
2590             };
2591             int fd;
2592             if (check_params(chkbuf, sizeof(chkbuf), fd_params, p) < 0) {
2593                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2594                 ret = -1;
2595                 goto out;
2596             }
2597             fd = strtol(buf, NULL, 0);
2598             ret = -1;
2599             if (net_socket_fd_init(vlan, device, name, fd, 1))
2600                 ret = 0;
2601         } else if (get_param_value(buf, sizeof(buf), "listen", p) > 0) {
2602             static const char * const listen_params[] = {
2603                 "vlan", "name", "listen", NULL
2604             };
2605             if (check_params(chkbuf, sizeof(chkbuf), listen_params, p) < 0) {
2606                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2607                 ret = -1;
2608                 goto out;
2609             }
2610             ret = net_socket_listen_init(vlan, device, name, buf);
2611         } else if (get_param_value(buf, sizeof(buf), "connect", p) > 0) {
2612             static const char * const connect_params[] = {
2613                 "vlan", "name", "connect", NULL
2614             };
2615             if (check_params(chkbuf, sizeof(chkbuf), connect_params, p) < 0) {
2616                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2617                 ret = -1;
2618                 goto out;
2619             }
2620             ret = net_socket_connect_init(vlan, device, name, buf);
2621         } else if (get_param_value(buf, sizeof(buf), "mcast", p) > 0) {
2622             static const char * const mcast_params[] = {
2623                 "vlan", "name", "mcast", NULL
2624             };
2625             if (check_params(chkbuf, sizeof(chkbuf), mcast_params, p) < 0) {
2626                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2627                 ret = -1;
2628                 goto out;
2629             }
2630             ret = net_socket_mcast_init(vlan, device, name, buf);
2631         } else {
2632             config_error(mon, "Unknown socket options: %s\n", p);
2633             ret = -1;
2634             goto out;
2635         }
2636         vlan->nb_host_devs++;
2637     } else
2638 #ifdef CONFIG_VDE
2639     if (!strcmp(device, "vde")) {
2640         static const char * const vde_params[] = {
2641             "vlan", "name", "sock", "port", "group", "mode", NULL
2642         };
2643         char vde_sock[1024], vde_group[512];
2644         int vde_port, vde_mode;
2645
2646         if (check_params(buf, sizeof(buf), vde_params, p) < 0) {
2647             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2648             ret = -1;
2649             goto out;
2650         }
2651         vlan->nb_host_devs++;
2652         if (get_param_value(vde_sock, sizeof(vde_sock), "sock", p) <= 0) {
2653             vde_sock[0] = '\0';
2654         }
2655         if (get_param_value(buf, sizeof(buf), "port", p) > 0) {
2656             vde_port = strtol(buf, NULL, 10);
2657         } else {
2658             vde_port = 0;
2659         }
2660         if (get_param_value(vde_group, sizeof(vde_group), "group", p) <= 0) {
2661             vde_group[0] = '\0';
2662         }
2663         if (get_param_value(buf, sizeof(buf), "mode", p) > 0) {
2664             vde_mode = strtol(buf, NULL, 8);
2665         } else {
2666             vde_mode = 0700;
2667         }
2668         ret = net_vde_init(vlan, device, name, vde_sock, vde_port, vde_group, vde_mode);
2669     } else
2670 #endif
2671     if (!strcmp(device, "dump")) {
2672         int len = 65536;
2673
2674         if (get_param_value(buf, sizeof(buf), "len", p) > 0) {
2675             len = strtol(buf, NULL, 0);
2676         }
2677         if (!get_param_value(buf, sizeof(buf), "file", p)) {
2678             snprintf(buf, sizeof(buf), "qemu-vlan%d.pcap", vlan_id);
2679         }
2680         ret = net_dump_init(mon, vlan, device, name, buf, len);
2681     } else {
2682         config_error(mon, "Unknown network device: %s\n", device);
2683         ret = -1;
2684         goto out;
2685     }
2686     if (ret < 0) {
2687         config_error(mon, "Could not initialize device '%s'\n", device);
2688     }
2689 out:
2690     qemu_free(name);
2691     return ret;
2692 }
2693
2694 void net_client_uninit(NICInfo *nd)
2695 {
2696     nd->vlan->nb_guest_devs--;
2697     nb_nics--;
2698     nd->used = 0;
2699     free((void *)nd->model);
2700 }
2701
2702 static int net_host_check_device(const char *device)
2703 {
2704     int i;
2705     const char *valid_param_list[] = { "tap", "socket", "dump"
2706 #ifdef CONFIG_SLIRP
2707                                        ,"user"
2708 #endif
2709 #ifdef CONFIG_VDE
2710                                        ,"vde"
2711 #endif
2712     };
2713     for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) {
2714         if (!strncmp(valid_param_list[i], device,
2715                      strlen(valid_param_list[i])))
2716             return 1;
2717     }
2718
2719     return 0;
2720 }
2721
2722 void net_host_device_add(Monitor *mon, const char *device, const char *opts)
2723 {
2724     if (!net_host_check_device(device)) {
2725         monitor_printf(mon, "invalid host network device %s\n", device);
2726         return;
2727     }
2728     if (net_client_init(mon, device, opts ? opts : "") < 0) {
2729         monitor_printf(mon, "adding host network device %s failed\n", device);
2730     }
2731 }
2732
2733 void net_host_device_remove(Monitor *mon, int vlan_id, const char *device)
2734 {
2735     VLANState *vlan;
2736     VLANClientState *vc;
2737
2738     vlan = qemu_find_vlan(vlan_id);
2739
2740     for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
2741         if (!strcmp(vc->name, device)) {
2742             break;
2743         }
2744     }
2745
2746     if (!vc) {
2747         monitor_printf(mon, "can't find device %s\n", device);
2748         return;
2749     }
2750     if (!net_host_check_device(vc->model)) {
2751         monitor_printf(mon, "invalid host network device %s\n", device);
2752         return;
2753     }
2754     qemu_del_vlan_client(vc);
2755 }
2756
2757 int net_client_parse(const char *str)
2758 {
2759     const char *p;
2760     char *q;
2761     char device[64];
2762
2763     p = str;
2764     q = device;
2765     while (*p != '\0' && *p != ',') {
2766         if ((q - device) < sizeof(device) - 1)
2767             *q++ = *p;
2768         p++;
2769     }
2770     *q = '\0';
2771     if (*p == ',')
2772         p++;
2773
2774     return net_client_init(NULL, device, p);
2775 }
2776
2777 void net_set_boot_mask(int net_boot_mask)
2778 {
2779     int i;
2780
2781     /* Only the first four NICs may be bootable */
2782     net_boot_mask = net_boot_mask & 0xF;
2783
2784     for (i = 0; i < nb_nics; i++) {
2785         if (net_boot_mask & (1 << i)) {
2786             nd_table[i].bootable = 1;
2787             net_boot_mask &= ~(1 << i);
2788         }
2789     }
2790
2791     if (net_boot_mask) {
2792         fprintf(stderr, "Cannot boot from non-existent NIC\n");
2793         exit(1);
2794     }
2795 }
2796
2797 void do_info_network(Monitor *mon)
2798 {
2799     VLANState *vlan;
2800     VLANClientState *vc;
2801
2802     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2803         monitor_printf(mon, "VLAN %d devices:\n", vlan->id);
2804         for(vc = vlan->first_client; vc != NULL; vc = vc->next)
2805             monitor_printf(mon, "  %s: %s\n", vc->name, vc->info_str);
2806     }
2807 }
2808
2809 int do_set_link(Monitor *mon, const char *name, const char *up_or_down)
2810 {
2811     VLANState *vlan;
2812     VLANClientState *vc = NULL;
2813
2814     for (vlan = first_vlan; vlan != NULL; vlan = vlan->next)
2815         for (vc = vlan->first_client; vc != NULL; vc = vc->next)
2816             if (strcmp(vc->name, name) == 0)
2817                 goto done;
2818 done:
2819
2820     if (!vc) {
2821         monitor_printf(mon, "could not find network device '%s'", name);
2822         return 0;
2823     }
2824
2825     if (strcmp(up_or_down, "up") == 0)
2826         vc->link_down = 0;
2827     else if (strcmp(up_or_down, "down") == 0)
2828         vc->link_down = 1;
2829     else
2830         monitor_printf(mon, "invalid link status '%s'; only 'up' or 'down' "
2831                        "valid\n", up_or_down);
2832
2833     if (vc->link_status_changed)
2834         vc->link_status_changed(vc);
2835
2836     return 1;
2837 }
2838
2839 void net_cleanup(void)
2840 {
2841     VLANState *vlan;
2842
2843     /* close network clients */
2844     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2845         VLANClientState *vc = vlan->first_client;
2846
2847         while (vc) {
2848             VLANClientState *next = vc->next;
2849
2850             qemu_del_vlan_client(vc);
2851
2852             vc = next;
2853         }
2854     }
2855 }
2856
2857 void net_client_check(void)
2858 {
2859     VLANState *vlan;
2860
2861     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2862         if (vlan->nb_guest_devs == 0 && vlan->nb_host_devs == 0)
2863             continue;
2864         if (vlan->nb_guest_devs == 0)
2865             fprintf(stderr, "Warning: vlan %d with no nics\n", vlan->id);
2866         if (vlan->nb_host_devs == 0)
2867             fprintf(stderr,
2868                     "Warning: vlan %d is not connected to host network\n",
2869                     vlan->id);
2870     }
2871 }