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 typedef struct SlirpState {
 681     TAILQ_ENTRY(SlirpState) entry;
 682     VLANClientState *vc;
 683     Slirp *slirp;
 684 #ifndef _WIN32
 685     char smb_dir[128];
 686 #endif
 687 } SlirpState;
 688
 689 static struct slirp_config_str *slirp_configs;
 690 const char *legacy_tftp_prefix;
 691 const char *legacy_bootp_filename;
 692 static TAILQ_HEAD(slirp_stacks, SlirpState) slirp_stacks =
 693     TAILQ_HEAD_INITIALIZER(slirp_stacks);
 694
 695 static void slirp_hostfwd(SlirpState *s, Monitor *mon, const char *redir_str,
 696                           int legacy_format);
 697 static void slirp_guestfwd(SlirpState *s, Monitor *mon, const char *config_str,
 698                            int legacy_format);
 699
 700 #ifndef _WIN32
 701 static const char *legacy_smb_export;
 702
 703 static void slirp_smb(SlirpState *s, Monitor *mon, const char *exported_dir,
 704                       struct in_addr vserver_addr);
 705 static void slirp_smb_cleanup(SlirpState *s);
 706 #else
 707 static inline void slirp_smb_cleanup(SlirpState *s) { }
 708 #endif
 709
 710 int slirp_can_output(void *opaque)
 711 {
 712     SlirpState *s = opaque;
 713
 714     return qemu_can_send_packet(s->vc);
 715 }
 716
 717 void slirp_output(void *opaque, const uint8_t *pkt, int pkt_len)
 718 {
 719     SlirpState *s = opaque;
 720
 721 #ifdef DEBUG_SLIRP
 722     printf("slirp output:\n");
 723     hex_dump(stdout, pkt, pkt_len);
 724 #endif
 725     qemu_send_packet(s->vc, pkt, pkt_len);
 726 }
 727
 728 static ssize_t slirp_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
 729 {
 730     SlirpState *s = vc->opaque;
 731
 732 #ifdef DEBUG_SLIRP
 733     printf("slirp input:\n");
 734     hex_dump(stdout, buf, size);
 735 #endif
 736     slirp_input(s->slirp, buf, size);
 737     return size;
 738 }
 739
 740 static void net_slirp_cleanup(VLANClientState *vc)
 741 {
 742     SlirpState *s = vc->opaque;
 743
 744     slirp_cleanup(s->slirp);
 745     slirp_smb_cleanup(s);
 746     TAILQ_REMOVE(&slirp_stacks, s, entry);
 747     qemu_free(s);
 748 }
 749
 750 static int net_slirp_init(Monitor *mon, VLANState *vlan, const char *model,
 751                           const char *name, int restricted,
 752                           const char *vnetwork, const char *vhost,
 753                           const char *vhostname, const char *tftp_export,
 754                           const char *bootfile, const char *vdhcp_start,
 755                           const char *vnameserver, const char *smb_export,
 756                           const char *vsmbserver)
 757 {
 758     /* default settings according to historic slirp */
 759     struct in_addr net  = { .s_addr = htonl(0x0a000000) }; /* 10.0.0.0 */
 760     struct in_addr mask = { .s_addr = htonl(0xff000000) }; /* 255.0.0.0 */
 761     struct in_addr host = { .s_addr = htonl(0x0a000202) }; /* 10.0.2.2 */
 762     struct in_addr dhcp = { .s_addr = htonl(0x0a00020f) }; /* 10.0.2.15 */
 763     struct in_addr dns  = { .s_addr = htonl(0x0a000203) }; /* 10.0.2.3 */
 764 #ifndef _WIN32
 765     struct in_addr smbsrv = { .s_addr = 0 };
 766 #endif
 767     SlirpState *s;
 768     char buf[20];
 769     uint32_t addr;
 770     int shift;
 771     char *end;
 772
 773     if (!tftp_export) {
 774         tftp_export = legacy_tftp_prefix;
 775     }
 776     if (!bootfile) {
 777         bootfile = legacy_bootp_filename;
 778     }
 779
 780     if (vnetwork) {
 781         if (get_str_sep(buf, sizeof(buf), &vnetwork, '/') < 0) {
 782             if (!inet_aton(vnetwork, &net)) {
 783                 return -1;
 784             }
 785             addr = ntohl(net.s_addr);
 786             if (!(addr & 0x80000000)) {
 787                 mask.s_addr = htonl(0xff000000); /* class A */
 788             } else if ((addr & 0xfff00000) == 0xac100000) {
 789                 mask.s_addr = htonl(0xfff00000); /* priv. 172.16.0.0/12 */
 790             } else if ((addr & 0xc0000000) == 0x80000000) {
 791                 mask.s_addr = htonl(0xffff0000); /* class B */
 792             } else if ((addr & 0xffff0000) == 0xc0a80000) {
 793                 mask.s_addr = htonl(0xffff0000); /* priv. 192.168.0.0/16 */
 794             } else if ((addr & 0xffff0000) == 0xc6120000) {
 795                 mask.s_addr = htonl(0xfffe0000); /* tests 198.18.0.0/15 */
 796             } else if ((addr & 0xe0000000) == 0xe0000000) {
 797                 mask.s_addr = htonl(0xffffff00); /* class C */
 798             } else {
 799                 mask.s_addr = htonl(0xfffffff0); /* multicast/reserved */
 800             }
 801         } else {
 802             if (!inet_aton(buf, &net)) {
 803                 return -1;
 804             }
 805             shift = strtol(vnetwork, &end, 10);
 806             if (*end != '\0') {
 807                 if (!inet_aton(vnetwork, &mask)) {
 808                     return -1;
 809                 }
 810             } else if (shift < 4 || shift > 32) {
 811                 return -1;
 812             } else {
 813                 mask.s_addr = htonl(0xffffffff << (32 - shift));
 814             }
 815         }
 816         net.s_addr &= mask.s_addr;
 817         host.s_addr = net.s_addr | (htonl(0x0202) & ~mask.s_addr);
 818         dhcp.s_addr = net.s_addr | (htonl(0x020f) & ~mask.s_addr);
 819         dns.s_addr  = net.s_addr | (htonl(0x0203) & ~mask.s_addr);
 820     }
 821
 822     if (vhost && !inet_aton(vhost, &host)) {
 823         return -1;
 824     }
 825     if ((host.s_addr & mask.s_addr) != net.s_addr) {
 826         return -1;
 827     }
 828
 829     if (vdhcp_start && !inet_aton(vdhcp_start, &dhcp)) {
 830         return -1;
 831     }
 832     if ((dhcp.s_addr & mask.s_addr) != net.s_addr ||
 833         dhcp.s_addr == host.s_addr || dhcp.s_addr == dns.s_addr) {
 834         return -1;
 835     }
 836
 837     if (vnameserver && !inet_aton(vnameserver, &dns)) {
 838         return -1;
 839     }
 840     if ((dns.s_addr & mask.s_addr) != net.s_addr ||
 841         dns.s_addr == host.s_addr) {
 842         return -1;
 843     }
 844
 845 #ifndef _WIN32
 846     if (vsmbserver && !inet_aton(vsmbserver, &smbsrv)) {
 847         return -1;
 848     }
 849 #endif
 850
 851     s = qemu_mallocz(sizeof(SlirpState));
 852     s->slirp = slirp_init(restricted, net, mask, host, vhostname,
 853                           tftp_export, bootfile, dhcp, dns, s);
 854     TAILQ_INSERT_TAIL(&slirp_stacks, s, entry);
 855
 856     while (slirp_configs) {
 857         struct slirp_config_str *config = slirp_configs;
 858
 859         if (config->flags & SLIRP_CFG_HOSTFWD) {
 860             slirp_hostfwd(s, mon, config->str,
 861                           config->flags & SLIRP_CFG_LEGACY);
 862         } else {
 863             slirp_guestfwd(s, mon, config->str,
 864                            config->flags & SLIRP_CFG_LEGACY);
 865         }
 866         slirp_configs = config->next;
 867         qemu_free(config);
 868     }
 869 #ifndef _WIN32
 870     if (!smb_export) {
 871         smb_export = legacy_smb_export;
 872     }
 873     if (smb_export) {
 874         slirp_smb(s, mon, smb_export, smbsrv);
 875     }
 876 #endif
 877
 878     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, slirp_receive, NULL,
 879                                  net_slirp_cleanup, s);
 880     s->vc->info_str[0] = '\0';
 881     return 0;
 882 }
 883
 884 void net_slirp_hostfwd_remove(Monitor *mon, const char *src_str)
 885 {
 886     struct in_addr host_addr = { .s_addr = INADDR_ANY };
 887     int host_port;
 888     char buf[256] = "";
 889     const char *p = src_str;
 890     int is_udp = 0;
 891     int err;
 892
 893     if (TAILQ_EMPTY(&slirp_stacks)) {
 894         monitor_printf(mon, "user mode network stack not in use\n");
 895         return;
 896     }
 897
 898     if (!src_str || !src_str[0])
 899         goto fail_syntax;
 900
 901     get_str_sep(buf, sizeof(buf), &p, ':');
 902
 903     if (!strcmp(buf, "tcp") || buf[0] == '\0') {
 904         is_udp = 0;
 905     } else if (!strcmp(buf, "udp")) {
 906         is_udp = 1;
 907     } else {
 908         goto fail_syntax;
 909     }
 910
 911     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 912         goto fail_syntax;
 913     }
 914     if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
 915         goto fail_syntax;
 916     }
 917
 918     host_port = atoi(p);
 919
 920     err = slirp_remove_hostfwd(TAILQ_FIRST(&slirp_stacks)->slirp, is_udp,
 921                                host_addr, host_port);
 922
 923     monitor_printf(mon, "host forwarding rule for %s %s\n", src_str,
 924                    err ? "removed" : "not found");
 925     return;
 926
 927  fail_syntax:
 928     monitor_printf(mon, "invalid format\n");
 929 }
 930
 931 static void slirp_hostfwd(SlirpState *s, Monitor *mon, const char *redir_str,
 932                           int legacy_format)
 933 {
 934     struct in_addr host_addr = { .s_addr = INADDR_ANY };
 935     struct in_addr guest_addr = { .s_addr = 0 };
 936     int host_port, guest_port;
 937     const char *p;
 938     char buf[256];
 939     int is_udp;
 940     char *end;
 941
 942     p = redir_str;
 943     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 944         goto fail_syntax;
 945     }
 946     if (!strcmp(buf, "tcp") || buf[0] == '\0') {
 947         is_udp = 0;
 948     } else if (!strcmp(buf, "udp")) {
 949         is_udp = 1;
 950     } else {
 951         goto fail_syntax;
 952     }
 953
 954     if (!legacy_format) {
 955         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 956             goto fail_syntax;
 957         }
 958         if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
 959             goto fail_syntax;
 960         }
 961     }
 962
 963     if (get_str_sep(buf, sizeof(buf), &p, legacy_format ? ':' : '-') < 0) {
 964         goto fail_syntax;
 965     }
 966     host_port = strtol(buf, &end, 0);
 967     if (*end != '\0' || host_port < 1 || host_port > 65535) {
 968         goto fail_syntax;
 969     }
 970
 971     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 972         goto fail_syntax;
 973     }
 974     if (buf[0] != '\0' && !inet_aton(buf, &guest_addr)) {
 975         goto fail_syntax;
 976     }
 977
 978     guest_port = strtol(p, &end, 0);
 979     if (*end != '\0' || guest_port < 1 || guest_port > 65535) {
 980         goto fail_syntax;
 981     }
 982
 983     if (slirp_add_hostfwd(s->slirp, is_udp, host_addr, host_port, guest_addr,
 984                           guest_port) < 0) {
 985         config_error(mon, "could not set up host forwarding rule '%s'\n",
 986                      redir_str);
 987     }
 988     return;
 989
 990  fail_syntax:
 991     config_error(mon, "invalid host forwarding rule '%s'\n", redir_str);
 992 }
 993
 994 void net_slirp_hostfwd_add(Monitor *mon, const char *redir_str)
 995 {
 996     if (TAILQ_EMPTY(&slirp_stacks)) {
 997         monitor_printf(mon, "user mode network stack not in use\n");
 998         return;
 999     }
1000
1001     slirp_hostfwd(TAILQ_FIRST(&slirp_stacks), mon, redir_str, 0);
1002 }
1003
1004 void net_slirp_redir(const char *redir_str)
1005 {
1006     struct slirp_config_str *config;
1007
1008     if (TAILQ_EMPTY(&slirp_stacks)) {
1009         config = qemu_malloc(sizeof(*config));
1010         pstrcpy(config->str, sizeof(config->str), redir_str);
1011         config->flags = SLIRP_CFG_HOSTFWD | SLIRP_CFG_LEGACY;
1012         config->next = slirp_configs;
1013         slirp_configs = config;
1014         return;
1015     }
1016
1017     slirp_hostfwd(TAILQ_FIRST(&slirp_stacks), NULL, redir_str, 1);
1018 }
1019
1020 #ifndef _WIN32
1021
1022 /* automatic user mode samba server configuration */
1023 static void slirp_smb_cleanup(SlirpState *s)
1024 {
1025     char cmd[128];
1026
1027     if (s->smb_dir[0] != '\0') {
1028         snprintf(cmd, sizeof(cmd), "rm -rf %s", s->smb_dir);
1029         system(cmd);
1030         s->smb_dir[0] = '\0';
1031     }
1032 }
1033
1034 static void slirp_smb(SlirpState* s, Monitor *mon, const char *exported_dir,
1035                       struct in_addr vserver_addr)
1036 {
1037     static int instance;
1038     char smb_conf[128];
1039     char smb_cmdline[128];
1040     FILE *f;
1041
1042     snprintf(s->smb_dir, sizeof(s->smb_dir), "/tmp/qemu-smb.%ld-%d",
1043              (long)getpid(), instance++);
1044     if (mkdir(s->smb_dir, 0700) < 0) {
1045         config_error(mon, "could not create samba server dir '%s'\n",
1046                      s->smb_dir);
1047         return;
1048     }
1049     snprintf(smb_conf, sizeof(smb_conf), "%s/%s", s->smb_dir, "smb.conf");
1050
1051     f = fopen(smb_conf, "w");
1052     if (!f) {
1053         slirp_smb_cleanup(s);
1054         config_error(mon, "could not create samba server "
1055                      "configuration file '%s'\n", smb_conf);
1056         return;
1057     }
1058     fprintf(f,
1059             "[global]\n"
1060             "private dir=%s\n"
1061             "smb ports=0\n"
1062             "socket address=127.0.0.1\n"
1063             "pid directory=%s\n"
1064             "lock directory=%s\n"
1065             "log file=%s/log.smbd\n"
1066             "smb passwd file=%s/smbpasswd\n"
1067             "security = share\n"
1068             "[qemu]\n"
1069             "path=%s\n"
1070             "read only=no\n"
1071             "guest ok=yes\n",
1072             s->smb_dir,
1073             s->smb_dir,
1074             s->smb_dir,
1075             s->smb_dir,
1076             s->smb_dir,
1077             exported_dir
1078             );
1079     fclose(f);
1080
1081     snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -s %s",
1082              SMBD_COMMAND, smb_conf);
1083
1084     if (slirp_add_exec(s->slirp, 0, smb_cmdline, vserver_addr, 139) < 0) {
1085         slirp_smb_cleanup(s);
1086         config_error(mon, "conflicting/invalid smbserver address\n");
1087     }
1088 }
1089
1090 /* automatic user mode samba server configuration (legacy interface) */
1091 void net_slirp_smb(const char *exported_dir)
1092 {
1093     struct in_addr vserver_addr = { .s_addr = 0 };
1094
1095     if (legacy_smb_export) {
1096         fprintf(stderr, "-smb given twice\n");
1097         exit(1);
1098     }
1099     legacy_smb_export = exported_dir;
1100     if (!TAILQ_EMPTY(&slirp_stacks)) {
1101         slirp_smb(TAILQ_FIRST(&slirp_stacks), NULL, exported_dir,
1102                   vserver_addr);
1103     }
1104 }
1105
1106 #endif /* !defined(_WIN32) */
1107
1108 struct GuestFwd {
1109     CharDriverState *hd;
1110     struct in_addr server;
1111     int port;
1112     Slirp *slirp;
1113 };
1114
1115 static int guestfwd_can_read(void *opaque)
1116 {
1117     struct GuestFwd *fwd = opaque;
1118     return slirp_socket_can_recv(fwd->slirp, fwd->server, fwd->port);
1119 }
1120
1121 static void guestfwd_read(void *opaque, const uint8_t *buf, int size)
1122 {
1123     struct GuestFwd *fwd = opaque;
1124     slirp_socket_recv(fwd->slirp, fwd->server, fwd->port, buf, size);
1125 }
1126
1127 static void slirp_guestfwd(SlirpState *s, Monitor *mon, const char *config_str,
1128                            int legacy_format)
1129 {
1130     struct in_addr server = { .s_addr = 0 };
1131     struct GuestFwd *fwd;
1132     const char *p;
1133     char buf[128];
1134     char *end;
1135     int port;
1136
1137     p = config_str;
1138     if (legacy_format) {
1139         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1140             goto fail_syntax;
1141         }
1142     } else {
1143         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1144             goto fail_syntax;
1145         }
1146         if (strcmp(buf, "tcp") && buf[0] != '\0') {
1147             goto fail_syntax;
1148         }
1149         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1150             goto fail_syntax;
1151         }
1152         if (buf[0] != '\0' && !inet_aton(buf, &server)) {
1153             goto fail_syntax;
1154         }
1155         if (get_str_sep(buf, sizeof(buf), &p, '-') < 0) {
1156             goto fail_syntax;
1157         }
1158     }
1159     port = strtol(buf, &end, 10);
1160     if (*end != '\0' || port < 1 || port > 65535) {
1161         goto fail_syntax;
1162     }
1163
1164     fwd = qemu_malloc(sizeof(struct GuestFwd));
1165     snprintf(buf, sizeof(buf), "guestfwd.tcp:%d", port);
1166     fwd->hd = qemu_chr_open(buf, p, NULL);
1167     if (!fwd->hd) {
1168         config_error(mon, "could not open guest forwarding device '%s'\n",
1169                      buf);
1170         qemu_free(fwd);
1171         return;
1172     }
1173     fwd->server = server;
1174     fwd->port = port;
1175     fwd->slirp = s->slirp;
1176
1177     if (slirp_add_exec(s->slirp, 3, fwd->hd, server, port) < 0) {
1178         config_error(mon, "conflicting/invalid host:port in guest forwarding "
1179                      "rule '%s'\n", config_str);
1180         qemu_free(fwd);
1181         return;
1182     }
1183     qemu_chr_add_handlers(fwd->hd, guestfwd_can_read, guestfwd_read,
1184                           NULL, fwd);
1185     return;
1186
1187  fail_syntax:
1188     config_error(mon, "invalid guest forwarding rule '%s'\n", config_str);
1189 }
1190
1191 void do_info_usernet(Monitor *mon)
1192 {
1193     SlirpState *s;
1194
1195     TAILQ_FOREACH(s, &slirp_stacks, entry) {
1196         monitor_printf(mon, "VLAN %d (%s):\n", s->vc->vlan->id, s->vc->name);
1197         slirp_connection_info(s->slirp, mon);
1198     }
1199 }
1200
1201 #endif /* CONFIG_SLIRP */
1202
1203 #if !defined(_WIN32)
1204
1205 typedef struct TAPState {
1206     VLANClientState *vc;
1207     int fd;
1208     char down_script[1024];
1209     char down_script_arg[128];
1210     uint8_t buf[4096];
1211     unsigned int read_poll : 1;
1212     unsigned int write_poll : 1;
1213 } TAPState;
1214
1215 static int launch_script(const char *setup_script, const char *ifname, int fd);
1216
1217 static int tap_can_send(void *opaque);
1218 static void tap_send(void *opaque);
1219 static void tap_writable(void *opaque);
1220
1221 static void tap_update_fd_handler(TAPState *s)
1222 {
1223     qemu_set_fd_handler2(s->fd,
1224                          s->read_poll  ? tap_can_send : NULL,
1225                          s->read_poll  ? tap_send     : NULL,
1226                          s->write_poll ? tap_writable : NULL,
1227                          s);
1228 }
1229
1230 static void tap_read_poll(TAPState *s, int enable)
1231 {
1232     s->read_poll = !!enable;
1233     tap_update_fd_handler(s);
1234 }
1235
1236 static void tap_write_poll(TAPState *s, int enable)
1237 {
1238     s->write_poll = !!enable;
1239     tap_update_fd_handler(s);
1240 }
1241
1242 static void tap_writable(void *opaque)
1243 {
1244     TAPState *s = opaque;
1245
1246     tap_write_poll(s, 0);
1247
1248     qemu_flush_queued_packets(s->vc);
1249 }
1250
1251 static ssize_t tap_receive_iov(VLANClientState *vc, const struct iovec *iov,
1252                                int iovcnt)
1253 {
1254     TAPState *s = vc->opaque;
1255     ssize_t len;
1256
1257     do {
1258         len = writev(s->fd, iov, iovcnt);
1259     } while (len == -1 && errno == EINTR);
1260
1261     if (len == -1 && errno == EAGAIN) {
1262         tap_write_poll(s, 1);
1263         return 0;
1264     }
1265
1266     return len;
1267 }
1268
1269 static ssize_t tap_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1270 {
1271     TAPState *s = vc->opaque;
1272     ssize_t len;
1273
1274     do {
1275         len = write(s->fd, buf, size);
1276     } while (len == -1 && (errno == EINTR || errno == EAGAIN));
1277
1278     return len;
1279 }
1280
1281 static int tap_can_send(void *opaque)
1282 {
1283     TAPState *s = opaque;
1284
1285     return qemu_can_send_packet(s->vc);
1286 }
1287
1288 #ifdef __sun__
1289 static ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
1290 {
1291     struct strbuf sbuf;
1292     int f = 0;
1293
1294     sbuf.maxlen = maxlen;
1295     sbuf.buf = (char *)buf;
1296
1297     return getmsg(tapfd, NULL, &sbuf, &f) >= 0 ? sbuf.len : -1;
1298 }
1299 #else
1300 static ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
1301 {
1302     return read(tapfd, buf, maxlen);
1303 }
1304 #endif
1305
1306 static void tap_send_completed(VLANClientState *vc, ssize_t len)
1307 {
1308     TAPState *s = vc->opaque;
1309     tap_read_poll(s, 1);
1310 }
1311
1312 static void tap_send(void *opaque)
1313 {
1314     TAPState *s = opaque;
1315     int size;
1316
1317     do {
1318         size = tap_read_packet(s->fd, s->buf, sizeof(s->buf));
1319         if (size <= 0) {
1320             break;
1321         }
1322
1323         size = qemu_send_packet_async(s->vc, s->buf, size, tap_send_completed);
1324         if (size == 0) {
1325             tap_read_poll(s, 0);
1326         }
1327     } while (size > 0);
1328 }
1329
1330 static void tap_set_sndbuf(TAPState *s, int sndbuf, Monitor *mon)
1331 {
1332 #ifdef TUNSETSNDBUF
1333     if (ioctl(s->fd, TUNSETSNDBUF, &sndbuf) == -1) {
1334         config_error(mon, "TUNSETSNDBUF ioctl failed: %s\n",
1335                      strerror(errno));
1336     }
1337 #else
1338     config_error(mon, "No '-net tap,sndbuf=<nbytes>' support available\n");
1339 #endif
1340 }
1341
1342 static void tap_cleanup(VLANClientState *vc)
1343 {
1344     TAPState *s = vc->opaque;
1345
1346     qemu_purge_queued_packets(vc);
1347
1348     if (s->down_script[0])
1349         launch_script(s->down_script, s->down_script_arg, s->fd);
1350
1351     tap_read_poll(s, 0);
1352     tap_write_poll(s, 0);
1353     close(s->fd);
1354     qemu_free(s);
1355 }
1356
1357 /* fd support */
1358
1359 static TAPState *net_tap_fd_init(VLANState *vlan,
1360                                  const char *model,
1361                                  const char *name,
1362                                  int fd)
1363 {
1364     TAPState *s;
1365
1366     s = qemu_mallocz(sizeof(TAPState));
1367     s->fd = fd;
1368     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, tap_receive,
1369                                  tap_receive_iov, tap_cleanup, s);
1370     tap_read_poll(s, 1);
1371     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "fd=%d", fd);
1372     return s;
1373 }
1374
1375 #if defined (HOST_BSD) || defined (__FreeBSD_kernel__)
1376 static int tap_open(char *ifname, int ifname_size)
1377 {
1378     int fd;
1379     char *dev;
1380     struct stat s;
1381
1382     TFR(fd = open("/dev/tap", O_RDWR));
1383     if (fd < 0) {
1384         fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n");
1385         return -1;
1386     }
1387
1388     fstat(fd, &s);
1389     dev = devname(s.st_rdev, S_IFCHR);
1390     pstrcpy(ifname, ifname_size, dev);
1391
1392     fcntl(fd, F_SETFL, O_NONBLOCK);
1393     return fd;
1394 }
1395 #elif defined(__sun__)
1396 #define TUNNEWPPA       (('T'<<16) | 0x0001)
1397 /*
1398  * Allocate TAP device, returns opened fd.
1399  * Stores dev name in the first arg(must be large enough).
1400  */
1401 static int tap_alloc(char *dev, size_t dev_size)
1402 {
1403     int tap_fd, if_fd, ppa = -1;
1404     static int ip_fd = 0;
1405     char *ptr;
1406
1407     static int arp_fd = 0;
1408     int ip_muxid, arp_muxid;
1409     struct strioctl  strioc_if, strioc_ppa;
1410     int link_type = I_PLINK;;
1411     struct lifreq ifr;
1412     char actual_name[32] = "";
1413
1414     memset(&ifr, 0x0, sizeof(ifr));
1415
1416     if( *dev ){
1417        ptr = dev;
1418        while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
1419        ppa = atoi(ptr);
1420     }
1421
1422     /* Check if IP device was opened */
1423     if( ip_fd )
1424        close(ip_fd);
1425
1426     TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
1427     if (ip_fd < 0) {
1428        syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)");
1429        return -1;
1430     }
1431
1432     TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
1433     if (tap_fd < 0) {
1434        syslog(LOG_ERR, "Can't open /dev/tap");
1435        return -1;
1436     }
1437
1438     /* Assign a new PPA and get its unit number. */
1439     strioc_ppa.ic_cmd = TUNNEWPPA;
1440     strioc_ppa.ic_timout = 0;
1441     strioc_ppa.ic_len = sizeof(ppa);
1442     strioc_ppa.ic_dp = (char *)&ppa;
1443     if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
1444        syslog (LOG_ERR, "Can't assign new interface");
1445
1446     TFR(if_fd = open("/dev/tap", O_RDWR, 0));
1447     if (if_fd < 0) {
1448        syslog(LOG_ERR, "Can't open /dev/tap (2)");
1449        return -1;
1450     }
1451     if(ioctl(if_fd, I_PUSH, "ip") < 0){
1452        syslog(LOG_ERR, "Can't push IP module");
1453        return -1;
1454     }
1455
1456     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
1457         syslog(LOG_ERR, "Can't get flags\n");
1458
1459     snprintf (actual_name, 32, "tap%d", ppa);
1460     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
1461
1462     ifr.lifr_ppa = ppa;
1463     /* Assign ppa according to the unit number returned by tun device */
1464
1465     if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
1466         syslog (LOG_ERR, "Can't set PPA %d", ppa);
1467     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
1468         syslog (LOG_ERR, "Can't get flags\n");
1469     /* Push arp module to if_fd */
1470     if (ioctl (if_fd, I_PUSH, "arp") < 0)
1471         syslog (LOG_ERR, "Can't push ARP module (2)");
1472
1473     /* Push arp module to ip_fd */
1474     if (ioctl (ip_fd, I_POP, NULL) < 0)
1475         syslog (LOG_ERR, "I_POP failed\n");
1476     if (ioctl (ip_fd, I_PUSH, "arp") < 0)
1477         syslog (LOG_ERR, "Can't push ARP module (3)\n");
1478     /* Open arp_fd */
1479     TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
1480     if (arp_fd < 0)
1481        syslog (LOG_ERR, "Can't open %s\n", "/dev/tap");
1482
1483     /* Set ifname to arp */
1484     strioc_if.ic_cmd = SIOCSLIFNAME;
1485     strioc_if.ic_timout = 0;
1486     strioc_if.ic_len = sizeof(ifr);
1487     strioc_if.ic_dp = (char *)&ifr;
1488     if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
1489         syslog (LOG_ERR, "Can't set ifname to arp\n");
1490     }
1491
1492     if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
1493        syslog(LOG_ERR, "Can't link TAP device to IP");
1494        return -1;
1495     }
1496
1497     if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
1498         syslog (LOG_ERR, "Can't link TAP device to ARP");
1499
1500     close (if_fd);
1501
1502     memset(&ifr, 0x0, sizeof(ifr));
1503     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
1504     ifr.lifr_ip_muxid  = ip_muxid;
1505     ifr.lifr_arp_muxid = arp_muxid;
1506
1507     if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
1508     {
1509       ioctl (ip_fd, I_PUNLINK , arp_muxid);
1510       ioctl (ip_fd, I_PUNLINK, ip_muxid);
1511       syslog (LOG_ERR, "Can't set multiplexor id");
1512     }
1513
1514     snprintf(dev, dev_size, "tap%d", ppa);
1515     return tap_fd;
1516 }
1517
1518 static int tap_open(char *ifname, int ifname_size)
1519 {
1520     char  dev[10]="";
1521     int fd;
1522     if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){
1523        fprintf(stderr, "Cannot allocate TAP device\n");
1524        return -1;
1525     }
1526     pstrcpy(ifname, ifname_size, dev);
1527     fcntl(fd, F_SETFL, O_NONBLOCK);
1528     return fd;
1529 }
1530 #elif defined (_AIX)
1531 static int tap_open(char *ifname, int ifname_size)
1532 {
1533     fprintf (stderr, "no tap on AIX\n");
1534     return -1;
1535 }
1536 #else
1537 static int tap_open(char *ifname, int ifname_size)
1538 {
1539     struct ifreq ifr;
1540     int fd, ret;
1541
1542     TFR(fd = open("/dev/net/tun", O_RDWR));
1543     if (fd < 0) {
1544         fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n");
1545         return -1;
1546     }
1547     memset(&ifr, 0, sizeof(ifr));
1548     ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
1549     if (ifname[0] != '\0')
1550         pstrcpy(ifr.ifr_name, IFNAMSIZ, ifname);
1551     else
1552         pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d");
1553     ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
1554     if (ret != 0) {
1555         fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n");
1556         close(fd);
1557         return -1;
1558     }
1559     pstrcpy(ifname, ifname_size, ifr.ifr_name);
1560     fcntl(fd, F_SETFL, O_NONBLOCK);
1561     return fd;
1562 }
1563 #endif
1564
1565 static int launch_script(const char *setup_script, const char *ifname, int fd)
1566 {
1567     sigset_t oldmask, mask;
1568     int pid, status;
1569     char *args[3];
1570     char **parg;
1571
1572     sigemptyset(&mask);
1573     sigaddset(&mask, SIGCHLD);
1574     sigprocmask(SIG_BLOCK, &mask, &oldmask);
1575
1576     /* try to launch network script */
1577     pid = fork();
1578     if (pid == 0) {
1579         int open_max = sysconf(_SC_OPEN_MAX), i;
1580
1581         for (i = 0; i < open_max; i++) {
1582             if (i != STDIN_FILENO &&
1583                 i != STDOUT_FILENO &&
1584                 i != STDERR_FILENO &&
1585                 i != fd) {
1586                 close(i);
1587             }
1588         }
1589         parg = args;
1590         *parg++ = (char *)setup_script;
1591         *parg++ = (char *)ifname;
1592         *parg++ = NULL;
1593         execv(setup_script, args);
1594         _exit(1);
1595     } else if (pid > 0) {
1596         while (waitpid(pid, &status, 0) != pid) {
1597             /* loop */
1598         }
1599         sigprocmask(SIG_SETMASK, &oldmask, NULL);
1600
1601         if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
1602             return 0;
1603         }
1604     }
1605     fprintf(stderr, "%s: could not launch network script\n", setup_script);
1606     return -1;
1607 }
1608
1609 static TAPState *net_tap_init(VLANState *vlan, const char *model,
1610                               const char *name, const char *ifname1,
1611                               const char *setup_script, const char *down_script)
1612 {
1613     TAPState *s;
1614     int fd;
1615     char ifname[128];
1616
1617     if (ifname1 != NULL)
1618         pstrcpy(ifname, sizeof(ifname), ifname1);
1619     else
1620         ifname[0] = '\0';
1621     TFR(fd = tap_open(ifname, sizeof(ifname)));
1622     if (fd < 0)
1623         return NULL;
1624
1625     if (!setup_script || !strcmp(setup_script, "no"))
1626         setup_script = "";
1627     if (setup_script[0] != '\0' &&
1628         launch_script(setup_script, ifname, fd)) {
1629         return NULL;
1630     }
1631     s = net_tap_fd_init(vlan, model, name, fd);
1632     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1633              "ifname=%s,script=%s,downscript=%s",
1634              ifname, setup_script, down_script);
1635     if (down_script && strcmp(down_script, "no")) {
1636         snprintf(s->down_script, sizeof(s->down_script), "%s", down_script);
1637         snprintf(s->down_script_arg, sizeof(s->down_script_arg), "%s", ifname);
1638     }
1639     return s;
1640 }
1641
1642 #endif /* !_WIN32 */
1643
1644 #if defined(CONFIG_VDE)
1645 typedef struct VDEState {
1646     VLANClientState *vc;
1647     VDECONN *vde;
1648 } VDEState;
1649
1650 static void vde_to_qemu(void *opaque)
1651 {
1652     VDEState *s = opaque;
1653     uint8_t buf[4096];
1654     int size;
1655
1656     size = vde_recv(s->vde, (char *)buf, sizeof(buf), 0);
1657     if (size > 0) {
1658         qemu_send_packet(s->vc, buf, size);
1659     }
1660 }
1661
1662 static ssize_t vde_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1663 {
1664     VDEState *s = vc->opaque;
1665     ssize_t ret;
1666
1667     do {
1668       ret = vde_send(s->vde, (const char *)buf, size, 0);
1669     } while (ret < 0 && errno == EINTR);
1670
1671     return ret;
1672 }
1673
1674 static void vde_cleanup(VLANClientState *vc)
1675 {
1676     VDEState *s = vc->opaque;
1677     qemu_set_fd_handler(vde_datafd(s->vde), NULL, NULL, NULL);
1678     vde_close(s->vde);
1679     qemu_free(s);
1680 }
1681
1682 static int net_vde_init(VLANState *vlan, const char *model,
1683                         const char *name, const char *sock,
1684                         int port, const char *group, int mode)
1685 {
1686     VDEState *s;
1687     char *init_group = strlen(group) ? (char *)group : NULL;
1688     char *init_sock = strlen(sock) ? (char *)sock : NULL;
1689
1690     struct vde_open_args args = {
1691         .port = port,
1692         .group = init_group,
1693         .mode = mode,
1694     };
1695
1696     s = qemu_mallocz(sizeof(VDEState));
1697     s->vde = vde_open(init_sock, (char *)"QEMU", &args);
1698     if (!s->vde){
1699         free(s);
1700         return -1;
1701     }
1702     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, vde_receive,
1703                                  NULL, vde_cleanup, s);
1704     qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
1705     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "sock=%s,fd=%d",
1706              sock, vde_datafd(s->vde));
1707     return 0;
1708 }
1709 #endif
1710
1711 /* network connection */
1712 typedef struct NetSocketState {
1713     VLANClientState *vc;
1714     int fd;
1715     int state; /* 0 = getting length, 1 = getting data */
1716     unsigned int index;
1717     unsigned int packet_len;
1718     uint8_t buf[4096];
1719     struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
1720 } NetSocketState;
1721
1722 typedef struct NetSocketListenState {
1723     VLANState *vlan;
1724     char *model;
1725     char *name;
1726     int fd;
1727 } NetSocketListenState;
1728
1729 /* XXX: we consider we can send the whole packet without blocking */
1730 static ssize_t net_socket_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1731 {
1732     NetSocketState *s = vc->opaque;
1733     uint32_t len;
1734     len = htonl(size);
1735
1736     send_all(s->fd, (const uint8_t *)&len, sizeof(len));
1737     return send_all(s->fd, buf, size);
1738 }
1739
1740 static ssize_t net_socket_receive_dgram(VLANClientState *vc, const uint8_t *buf, size_t size)
1741 {
1742     NetSocketState *s = vc->opaque;
1743
1744     return sendto(s->fd, (const void *)buf, size, 0,
1745                   (struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst));
1746 }
1747
1748 static void net_socket_send(void *opaque)
1749 {
1750     NetSocketState *s = opaque;
1751     int size, err;
1752     unsigned l;
1753     uint8_t buf1[4096];
1754     const uint8_t *buf;
1755
1756     size = recv(s->fd, (void *)buf1, sizeof(buf1), 0);
1757     if (size < 0) {
1758         err = socket_error();
1759         if (err != EWOULDBLOCK)
1760             goto eoc;
1761     } else if (size == 0) {
1762         /* end of connection */
1763     eoc:
1764         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1765         closesocket(s->fd);
1766         return;
1767     }
1768     buf = buf1;
1769     while (size > 0) {
1770         /* reassemble a packet from the network */
1771         switch(s->state) {
1772         case 0:
1773             l = 4 - s->index;
1774             if (l > size)
1775                 l = size;
1776             memcpy(s->buf + s->index, buf, l);
1777             buf += l;
1778             size -= l;
1779             s->index += l;
1780             if (s->index == 4) {
1781                 /* got length */
1782                 s->packet_len = ntohl(*(uint32_t *)s->buf);
1783                 s->index = 0;
1784                 s->state = 1;
1785             }
1786             break;
1787         case 1:
1788             l = s->packet_len - s->index;
1789             if (l > size)
1790                 l = size;
1791             if (s->index + l <= sizeof(s->buf)) {
1792                 memcpy(s->buf + s->index, buf, l);
1793             } else {
1794                 fprintf(stderr, "serious error: oversized packet received,"
1795                     "connection terminated.\n");
1796                 s->state = 0;
1797                 goto eoc;
1798             }
1799
1800             s->index += l;
1801             buf += l;
1802             size -= l;
1803             if (s->index >= s->packet_len) {
1804                 qemu_send_packet(s->vc, s->buf, s->packet_len);
1805                 s->index = 0;
1806                 s->state = 0;
1807             }
1808             break;
1809         }
1810     }
1811 }
1812
1813 static void net_socket_send_dgram(void *opaque)
1814 {
1815     NetSocketState *s = opaque;
1816     int size;
1817
1818     size = recv(s->fd, (void *)s->buf, sizeof(s->buf), 0);
1819     if (size < 0)
1820         return;
1821     if (size == 0) {
1822         /* end of connection */
1823         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1824         return;
1825     }
1826     qemu_send_packet(s->vc, s->buf, size);
1827 }
1828
1829 static int net_socket_mcast_create(struct sockaddr_in *mcastaddr)
1830 {
1831     struct ip_mreq imr;
1832     int fd;
1833     int val, ret;
1834     if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
1835         fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n",
1836                 inet_ntoa(mcastaddr->sin_addr),
1837                 (int)ntohl(mcastaddr->sin_addr.s_addr));
1838         return -1;
1839
1840     }
1841     fd = socket(PF_INET, SOCK_DGRAM, 0);
1842     if (fd < 0) {
1843         perror("socket(PF_INET, SOCK_DGRAM)");
1844         return -1;
1845     }
1846
1847     val = 1;
1848     ret=setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
1849                    (const char *)&val, sizeof(val));
1850     if (ret < 0) {
1851         perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
1852         goto fail;
1853     }
1854
1855     ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
1856     if (ret < 0) {
1857         perror("bind");
1858         goto fail;
1859     }
1860
1861     /* Add host to multicast group */
1862     imr.imr_multiaddr = mcastaddr->sin_addr;
1863     imr.imr_interface.s_addr = htonl(INADDR_ANY);
1864
1865     ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1866                      (const char *)&imr, sizeof(struct ip_mreq));
1867     if (ret < 0) {
1868         perror("setsockopt(IP_ADD_MEMBERSHIP)");
1869         goto fail;
1870     }
1871
1872     /* Force mcast msgs to loopback (eg. several QEMUs in same host */
1873     val = 1;
1874     ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1875                    (const char *)&val, sizeof(val));
1876     if (ret < 0) {
1877         perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
1878         goto fail;
1879     }
1880
1881     socket_set_nonblock(fd);
1882     return fd;
1883 fail:
1884     if (fd >= 0)
1885         closesocket(fd);
1886     return -1;
1887 }
1888
1889 static void net_socket_cleanup(VLANClientState *vc)
1890 {
1891     NetSocketState *s = vc->opaque;
1892     qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1893     close(s->fd);
1894     qemu_free(s);
1895 }
1896
1897 static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
1898                                                 const char *model,
1899                                                 const char *name,
1900                                                 int fd, int is_connected)
1901 {
1902     struct sockaddr_in saddr;
1903     int newfd;
1904     socklen_t saddr_len;
1905     NetSocketState *s;
1906
1907     /* fd passed: multicast: "learn" dgram_dst address from bound address and save it
1908      * Because this may be "shared" socket from a "master" process, datagrams would be recv()
1909      * by ONLY ONE process: we must "clone" this dgram socket --jjo
1910      */
1911
1912     if (is_connected) {
1913         if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
1914             /* must be bound */
1915             if (saddr.sin_addr.s_addr==0) {
1916                 fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, cannot setup multicast dst addr\n",
1917                         fd);
1918                 return NULL;
1919             }
1920             /* clone dgram socket */
1921             newfd = net_socket_mcast_create(&saddr);
1922             if (newfd < 0) {
1923                 /* error already reported by net_socket_mcast_create() */
1924                 close(fd);
1925                 return NULL;
1926             }
1927             /* clone newfd to fd, close newfd */
1928             dup2(newfd, fd);
1929             close(newfd);
1930
1931         } else {
1932             fprintf(stderr, "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
1933                     fd, strerror(errno));
1934             return NULL;
1935         }
1936     }
1937
1938     s = qemu_mallocz(sizeof(NetSocketState));
1939     s->fd = fd;
1940
1941     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, net_socket_receive_dgram,
1942                                  NULL, net_socket_cleanup, s);
1943     qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s);
1944
1945     /* mcast: save bound address as dst */
1946     if (is_connected) s->dgram_dst=saddr;
1947
1948     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1949             "socket: fd=%d (%s mcast=%s:%d)",
1950             fd, is_connected? "cloned" : "",
1951             inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1952     return s;
1953 }
1954
1955 static void net_socket_connect(void *opaque)
1956 {
1957     NetSocketState *s = opaque;
1958     qemu_set_fd_handler(s->fd, net_socket_send, NULL, s);
1959 }
1960
1961 static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
1962                                                  const char *model,
1963                                                  const char *name,
1964                                                  int fd, int is_connected)
1965 {
1966     NetSocketState *s;
1967     s = qemu_mallocz(sizeof(NetSocketState));
1968     s->fd = fd;
1969     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, net_socket_receive,
1970                                  NULL, net_socket_cleanup, s);
1971     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1972              "socket: fd=%d", fd);
1973     if (is_connected) {
1974         net_socket_connect(s);
1975     } else {
1976         qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
1977     }
1978     return s;
1979 }
1980
1981 static NetSocketState *net_socket_fd_init(VLANState *vlan,
1982                                           const char *model, const char *name,
1983                                           int fd, int is_connected)
1984 {
1985     int so_type=-1, optlen=sizeof(so_type);
1986
1987     if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type,
1988         (socklen_t *)&optlen)< 0) {
1989         fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n", fd);
1990         return NULL;
1991     }
1992     switch(so_type) {
1993     case SOCK_DGRAM:
1994         return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected);
1995     case SOCK_STREAM:
1996         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1997     default:
1998         /* who knows ... this could be a eg. a pty, do warn and continue as stream */
1999         fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
2000         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
2001     }
2002     return NULL;
2003 }
2004
2005 static void net_socket_accept(void *opaque)
2006 {
2007     NetSocketListenState *s = opaque;
2008     NetSocketState *s1;
2009     struct sockaddr_in saddr;
2010     socklen_t len;
2011     int fd;
2012
2013     for(;;) {
2014         len = sizeof(saddr);
2015         fd = accept(s->fd, (struct sockaddr *)&saddr, &len);
2016         if (fd < 0 && errno != EINTR) {
2017             return;
2018         } else if (fd >= 0) {
2019             break;
2020         }
2021     }
2022     s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1);
2023     if (!s1) {
2024         closesocket(fd);
2025     } else {
2026         snprintf(s1->vc->info_str, sizeof(s1->vc->info_str),
2027                  "socket: connection from %s:%d",
2028                  inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2029     }
2030 }
2031
2032 static int net_socket_listen_init(VLANState *vlan,
2033                                   const char *model,
2034                                   const char *name,
2035                                   const char *host_str)
2036 {
2037     NetSocketListenState *s;
2038     int fd, val, ret;
2039     struct sockaddr_in saddr;
2040
2041     if (parse_host_port(&saddr, host_str) < 0)
2042         return -1;
2043
2044     s = qemu_mallocz(sizeof(NetSocketListenState));
2045
2046     fd = socket(PF_INET, SOCK_STREAM, 0);
2047     if (fd < 0) {
2048         perror("socket");
2049         return -1;
2050     }
2051     socket_set_nonblock(fd);
2052
2053     /* allow fast reuse */
2054     val = 1;
2055     setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));
2056
2057     ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
2058     if (ret < 0) {
2059         perror("bind");
2060         return -1;
2061     }
2062     ret = listen(fd, 0);
2063     if (ret < 0) {
2064         perror("listen");
2065         return -1;
2066     }
2067     s->vlan = vlan;
2068     s->model = strdup(model);
2069     s->name = name ? strdup(name) : NULL;
2070     s->fd = fd;
2071     qemu_set_fd_handler(fd, net_socket_accept, NULL, s);
2072     return 0;
2073 }
2074
2075 static int net_socket_connect_init(VLANState *vlan,
2076                                    const char *model,
2077                                    const char *name,
2078                                    const char *host_str)
2079 {
2080     NetSocketState *s;
2081     int fd, connected, ret, err;
2082     struct sockaddr_in saddr;
2083
2084     if (parse_host_port(&saddr, host_str) < 0)
2085         return -1;
2086
2087     fd = socket(PF_INET, SOCK_STREAM, 0);
2088     if (fd < 0) {
2089         perror("socket");
2090         return -1;
2091     }
2092     socket_set_nonblock(fd);
2093
2094     connected = 0;
2095     for(;;) {
2096         ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
2097         if (ret < 0) {
2098             err = socket_error();
2099             if (err == EINTR || err == EWOULDBLOCK) {
2100             } else if (err == EINPROGRESS) {
2101                 break;
2102 #ifdef _WIN32
2103             } else if (err == WSAEALREADY) {
2104                 break;
2105 #endif
2106             } else {
2107                 perror("connect");
2108                 closesocket(fd);
2109                 return -1;
2110             }
2111         } else {
2112             connected = 1;
2113             break;
2114         }
2115     }
2116     s = net_socket_fd_init(vlan, model, name, fd, connected);
2117     if (!s)
2118         return -1;
2119     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2120              "socket: connect to %s:%d",
2121              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2122     return 0;
2123 }
2124
2125 static int net_socket_mcast_init(VLANState *vlan,
2126                                  const char *model,
2127                                  const char *name,
2128                                  const char *host_str)
2129 {
2130     NetSocketState *s;
2131     int fd;
2132     struct sockaddr_in saddr;
2133
2134     if (parse_host_port(&saddr, host_str) < 0)
2135         return -1;
2136
2137
2138     fd = net_socket_mcast_create(&saddr);
2139     if (fd < 0)
2140         return -1;
2141
2142     s = net_socket_fd_init(vlan, model, name, fd, 0);
2143     if (!s)
2144         return -1;
2145
2146     s->dgram_dst = saddr;
2147
2148     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2149              "socket: mcast=%s:%d",
2150              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2151     return 0;
2152
2153 }
2154
2155 typedef struct DumpState {
2156     VLANClientState *pcap_vc;
2157     int fd;
2158     int pcap_caplen;
2159 } DumpState;
2160
2161 #define PCAP_MAGIC 0xa1b2c3d4
2162
2163 struct pcap_file_hdr {
2164     uint32_t magic;
2165     uint16_t version_major;
2166     uint16_t version_minor;
2167     int32_t thiszone;
2168     uint32_t sigfigs;
2169     uint32_t snaplen;
2170     uint32_t linktype;
2171 };
2172
2173 struct pcap_sf_pkthdr {
2174     struct {
2175         int32_t tv_sec;
2176         int32_t tv_usec;
2177     } ts;
2178     uint32_t caplen;
2179     uint32_t len;
2180 };
2181
2182 static ssize_t dump_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
2183 {
2184     DumpState *s = vc->opaque;
2185     struct pcap_sf_pkthdr hdr;
2186     int64_t ts;
2187     int caplen;
2188
2189     /* Early return in case of previous error. */
2190     if (s->fd < 0) {
2191         return size;
2192     }
2193
2194     ts = muldiv64(qemu_get_clock(vm_clock), 1000000, ticks_per_sec);
2195     caplen = size > s->pcap_caplen ? s->pcap_caplen : size;
2196
2197     hdr.ts.tv_sec = ts / 1000000;
2198     hdr.ts.tv_usec = ts % 1000000;
2199     hdr.caplen = caplen;
2200     hdr.len = size;
2201     if (write(s->fd, &hdr, sizeof(hdr)) != sizeof(hdr) ||
2202         write(s->fd, buf, caplen) != caplen) {
2203         qemu_log("-net dump write error - stop dump\n");
2204         close(s->fd);
2205         s->fd = -1;
2206     }
2207
2208     return size;
2209 }
2210
2211 static void net_dump_cleanup(VLANClientState *vc)
2212 {
2213     DumpState *s = vc->opaque;
2214
2215     close(s->fd);
2216     qemu_free(s);
2217 }
2218
2219 static int net_dump_init(Monitor *mon, VLANState *vlan, const char *device,
2220                          const char *name, const char *filename, int len)
2221 {
2222     struct pcap_file_hdr hdr;
2223     DumpState *s;
2224
2225     s = qemu_malloc(sizeof(DumpState));
2226
2227     s->fd = open(filename, O_CREAT | O_WRONLY | O_BINARY, 0644);
2228     if (s->fd < 0) {
2229         config_error(mon, "-net dump: can't open %s\n", filename);
2230         return -1;
2231     }
2232
2233     s->pcap_caplen = len;
2234
2235     hdr.magic = PCAP_MAGIC;
2236     hdr.version_major = 2;
2237     hdr.version_minor = 4;
2238     hdr.thiszone = 0;
2239     hdr.sigfigs = 0;
2240     hdr.snaplen = s->pcap_caplen;
2241     hdr.linktype = 1;
2242
2243     if (write(s->fd, &hdr, sizeof(hdr)) < sizeof(hdr)) {
2244         config_error(mon, "-net dump write error: %s\n", strerror(errno));
2245         close(s->fd);
2246         qemu_free(s);
2247         return -1;
2248     }
2249
2250     s->pcap_vc = qemu_new_vlan_client(vlan, device, name, NULL, dump_receive, NULL,
2251                                       net_dump_cleanup, s);
2252     snprintf(s->pcap_vc->info_str, sizeof(s->pcap_vc->info_str),
2253              "dump to %s (len=%d)", filename, len);
2254     return 0;
2255 }
2256
2257 /* find or alloc a new VLAN */
2258 VLANState *qemu_find_vlan(int id)
2259 {
2260     VLANState **pvlan, *vlan;
2261     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2262         if (vlan->id == id)
2263             return vlan;
2264     }
2265     vlan = qemu_mallocz(sizeof(VLANState));
2266     vlan->id = id;
2267     vlan->next = NULL;
2268     pvlan = &first_vlan;
2269     while (*pvlan != NULL)
2270         pvlan = &(*pvlan)->next;
2271     *pvlan = vlan;
2272     return vlan;
2273 }
2274
2275 static int nic_get_free_idx(void)
2276 {
2277     int index;
2278
2279     for (index = 0; index < MAX_NICS; index++)
2280         if (!nd_table[index].used)
2281             return index;
2282     return -1;
2283 }
2284
2285 void qemu_check_nic_model(NICInfo *nd, const char *model)
2286 {
2287     const char *models[2];
2288
2289     models[0] = model;
2290     models[1] = NULL;
2291
2292     qemu_check_nic_model_list(nd, models, model);
2293 }
2294
2295 void qemu_check_nic_model_list(NICInfo *nd, const char * const *models,
2296                                const char *default_model)
2297 {
2298     int i, exit_status = 0;
2299
2300     if (!nd->model)
2301         nd->model = strdup(default_model);
2302
2303     if (strcmp(nd->model, "?") != 0) {
2304         for (i = 0 ; models[i]; i++)
2305             if (strcmp(nd->model, models[i]) == 0)
2306                 return;
2307
2308         fprintf(stderr, "qemu: Unsupported NIC model: %s\n", nd->model);
2309         exit_status = 1;
2310     }
2311
2312     fprintf(stderr, "qemu: Supported NIC models: ");
2313     for (i = 0 ; models[i]; i++)
2314         fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
2315
2316     exit(exit_status);
2317 }
2318
2319 int net_client_init(Monitor *mon, const char *device, const char *p)
2320 {
2321     char buf[1024];
2322     int vlan_id, ret;
2323     VLANState *vlan;
2324     char *name = NULL;
2325
2326     vlan_id = 0;
2327     if (get_param_value(buf, sizeof(buf), "vlan", p)) {
2328         vlan_id = strtol(buf, NULL, 0);
2329     }
2330     vlan = qemu_find_vlan(vlan_id);
2331
2332     if (get_param_value(buf, sizeof(buf), "name", p)) {
2333         name = qemu_strdup(buf);
2334     }
2335     if (!strcmp(device, "nic")) {
2336         static const char * const nic_params[] = {
2337             "vlan", "name", "macaddr", "model", "addr", "vectors", NULL
2338         };
2339         NICInfo *nd;
2340         uint8_t *macaddr;
2341         int idx = nic_get_free_idx();
2342
2343         if (check_params(buf, sizeof(buf), nic_params, p) < 0) {
2344             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2345             ret = -1;
2346             goto out;
2347         }
2348         if (idx == -1 || nb_nics >= MAX_NICS) {
2349             config_error(mon, "Too Many NICs\n");
2350             ret = -1;
2351             goto out;
2352         }
2353         nd = &nd_table[idx];
2354         macaddr = nd->macaddr;
2355         macaddr[0] = 0x52;
2356         macaddr[1] = 0x54;
2357         macaddr[2] = 0x00;
2358         macaddr[3] = 0x12;
2359         macaddr[4] = 0x34;
2360         macaddr[5] = 0x56 + idx;
2361
2362         if (get_param_value(buf, sizeof(buf), "macaddr", p)) {
2363             if (parse_macaddr(macaddr, buf) < 0) {
2364                 config_error(mon, "invalid syntax for ethernet address\n");
2365                 ret = -1;
2366                 goto out;
2367             }
2368         }
2369         if (get_param_value(buf, sizeof(buf), "model", p)) {
2370             nd->model = strdup(buf);
2371         }
2372         if (get_param_value(buf, sizeof(buf), "addr", p)) {
2373             nd->devaddr = strdup(buf);
2374         }
2375         nd->nvectors = NIC_NVECTORS_UNSPECIFIED;
2376         if (get_param_value(buf, sizeof(buf), "vectors", p)) {
2377             char *endptr;
2378             long vectors = strtol(buf, &endptr, 0);
2379             if (*endptr) {
2380                 config_error(mon, "invalid syntax for # of vectors\n");
2381                 ret = -1;
2382                 goto out;
2383             }
2384             if (vectors < 0 || vectors > 0x7ffffff) {
2385                 config_error(mon, "invalid # of vectors\n");
2386                 ret = -1;
2387                 goto out;
2388             }
2389             nd->nvectors = vectors;
2390         }
2391         nd->vlan = vlan;
2392         nd->name = name;
2393         nd->used = 1;
2394         name = NULL;
2395         nb_nics++;
2396         vlan->nb_guest_devs++;
2397         ret = idx;
2398     } else
2399     if (!strcmp(device, "none")) {
2400         if (*p != '\0') {
2401             config_error(mon, "'none' takes no parameters\n");
2402             ret = -1;
2403             goto out;
2404         }
2405         /* does nothing. It is needed to signal that no network cards
2406            are wanted */
2407         ret = 0;
2408     } else
2409 #ifdef CONFIG_SLIRP
2410     if (!strcmp(device, "user")) {
2411         static const char * const slirp_params[] = {
2412             "vlan", "name", "hostname", "restrict", "ip", "net", "host",
2413             "tftp", "bootfile", "dhcpstart", "dns", "smb", "smbserver",
2414             "hostfwd", "guestfwd", NULL
2415         };
2416         struct slirp_config_str *config;
2417         int restricted = 0;
2418         char *vnet = NULL;
2419         char *vhost = NULL;
2420         char *vhostname = NULL;
2421         char *tftp_export = NULL;
2422         char *bootfile = NULL;
2423         char *vdhcp_start = NULL;
2424         char *vnamesrv = NULL;
2425         char *smb_export = NULL;
2426         char *vsmbsrv = NULL;
2427         const char *q;
2428
2429         if (check_params(buf, sizeof(buf), slirp_params, p) < 0) {
2430             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2431             ret = -1;
2432             goto out;
2433         }
2434         if (get_param_value(buf, sizeof(buf), "ip", p)) {
2435             /* emulate legacy parameter */
2436             vnet = qemu_malloc(strlen(buf) + strlen("/24") + 1);
2437             strcpy(vnet, buf);
2438             strcat(vnet, "/24");
2439         }
2440         if (get_param_value(buf, sizeof(buf), "net", p)) {
2441             vnet = qemu_strdup(buf);
2442         }
2443         if (get_param_value(buf, sizeof(buf), "host", p)) {
2444             vhost = qemu_strdup(buf);
2445         }
2446         if (get_param_value(buf, sizeof(buf), "hostname", p)) {
2447             vhostname = qemu_strdup(buf);
2448         }
2449         if (get_param_value(buf, sizeof(buf), "restrict", p)) {
2450             restricted = (buf[0] == 'y') ? 1 : 0;
2451         }
2452         if (get_param_value(buf, sizeof(buf), "dhcpstart", p)) {
2453             vdhcp_start = qemu_strdup(buf);
2454         }
2455         if (get_param_value(buf, sizeof(buf), "dns", p)) {
2456             vnamesrv = qemu_strdup(buf);
2457         }
2458         if (get_param_value(buf, sizeof(buf), "tftp", p)) {
2459             tftp_export = qemu_strdup(buf);
2460         }
2461         if (get_param_value(buf, sizeof(buf), "bootfile", p)) {
2462             bootfile = qemu_strdup(buf);
2463         }
2464         if (get_param_value(buf, sizeof(buf), "smb", p)) {
2465             smb_export = qemu_strdup(buf);
2466             if (get_param_value(buf, sizeof(buf), "smbserver", p)) {
2467                 vsmbsrv = qemu_strdup(buf);
2468             }
2469         }
2470         q = p;
2471         while (1) {
2472             config = qemu_malloc(sizeof(*config));
2473             if (!get_next_param_value(config->str, sizeof(config->str),
2474                                       "hostfwd", &q)) {
2475                 break;
2476             }
2477             config->flags = SLIRP_CFG_HOSTFWD;
2478             config->next = slirp_configs;
2479             slirp_configs = config;
2480             config = NULL;
2481         }
2482         q = p;
2483         while (1) {
2484             config = qemu_malloc(sizeof(*config));
2485             if (!get_next_param_value(config->str, sizeof(config->str),
2486                                       "guestfwd", &q)) {
2487                 break;
2488             }
2489             config->flags = 0;
2490             config->next = slirp_configs;
2491             slirp_configs = config;
2492             config = NULL;
2493         }
2494         qemu_free(config);
2495         vlan->nb_host_devs++;
2496         ret = net_slirp_init(mon, vlan, device, name, restricted, vnet, vhost,
2497                              vhostname, tftp_export, bootfile, vdhcp_start,
2498                              vnamesrv, smb_export, vsmbsrv);
2499         qemu_free(vnet);
2500         qemu_free(vhost);
2501         qemu_free(vhostname);
2502         qemu_free(tftp_export);
2503         qemu_free(bootfile);
2504         qemu_free(vdhcp_start);
2505         qemu_free(vnamesrv);
2506         qemu_free(smb_export);
2507         qemu_free(vsmbsrv);
2508     } else if (!strcmp(device, "channel")) {
2509         if (TAILQ_EMPTY(&slirp_stacks)) {
2510             struct slirp_config_str *config;
2511
2512             config = qemu_malloc(sizeof(*config));
2513             pstrcpy(config->str, sizeof(config->str), p);
2514             config->flags = SLIRP_CFG_LEGACY;
2515             config->next = slirp_configs;
2516             slirp_configs = config;
2517         } else {
2518             slirp_guestfwd(TAILQ_FIRST(&slirp_stacks), mon, p, 1);
2519         }
2520         ret = 0;
2521     } else
2522 #endif
2523 #ifdef _WIN32
2524     if (!strcmp(device, "tap")) {
2525         static const char * const tap_params[] = {
2526             "vlan", "name", "ifname", NULL
2527         };
2528         char ifname[64];
2529
2530         if (check_params(buf, sizeof(buf), tap_params, p) < 0) {
2531             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2532             ret = -1;
2533             goto out;
2534         }
2535         if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
2536             config_error(mon, "tap: no interface name\n");
2537             ret = -1;
2538             goto out;
2539         }
2540         vlan->nb_host_devs++;
2541         ret = tap_win32_init(vlan, device, name, ifname);
2542     } else
2543 #elif defined (_AIX)
2544 #else
2545     if (!strcmp(device, "tap")) {
2546         char ifname[64], chkbuf[64];
2547         char setup_script[1024], down_script[1024];
2548         TAPState *s;
2549         int fd;
2550         vlan->nb_host_devs++;
2551         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
2552             static const char * const fd_params[] = {
2553                 "vlan", "name", "fd", "sndbuf", NULL
2554             };
2555             if (check_params(chkbuf, sizeof(chkbuf), fd_params, p) < 0) {
2556                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2557                 ret = -1;
2558                 goto out;
2559             }
2560             fd = strtol(buf, NULL, 0);
2561             fcntl(fd, F_SETFL, O_NONBLOCK);
2562             s = net_tap_fd_init(vlan, device, name, fd);
2563         } else {
2564             static const char * const tap_params[] = {
2565                 "vlan", "name", "ifname", "script", "downscript", "sndbuf", NULL
2566             };
2567             if (check_params(chkbuf, sizeof(chkbuf), tap_params, p) < 0) {
2568                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2569                 ret = -1;
2570                 goto out;
2571             }
2572             if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
2573                 ifname[0] = '\0';
2574             }
2575             if (get_param_value(setup_script, sizeof(setup_script), "script", p) == 0) {
2576                 pstrcpy(setup_script, sizeof(setup_script), DEFAULT_NETWORK_SCRIPT);
2577             }
2578             if (get_param_value(down_script, sizeof(down_script), "downscript", p) == 0) {
2579                 pstrcpy(down_script, sizeof(down_script), DEFAULT_NETWORK_DOWN_SCRIPT);
2580             }
2581             s = net_tap_init(vlan, device, name, ifname, setup_script, down_script);
2582         }
2583         if (s != NULL) {
2584             if (get_param_value(buf, sizeof(buf), "sndbuf", p)) {
2585                 tap_set_sndbuf(s, atoi(buf), mon);
2586             }
2587             ret = 0;
2588         } else {
2589             ret = -1;
2590         }
2591     } else
2592 #endif
2593     if (!strcmp(device, "socket")) {
2594         char chkbuf[64];
2595         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
2596             static const char * const fd_params[] = {
2597                 "vlan", "name", "fd", NULL
2598             };
2599             int fd;
2600             if (check_params(chkbuf, sizeof(chkbuf), fd_params, p) < 0) {
2601                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2602                 ret = -1;
2603                 goto out;
2604             }
2605             fd = strtol(buf, NULL, 0);
2606             ret = -1;
2607             if (net_socket_fd_init(vlan, device, name, fd, 1))
2608                 ret = 0;
2609         } else if (get_param_value(buf, sizeof(buf), "listen", p) > 0) {
2610             static const char * const listen_params[] = {
2611                 "vlan", "name", "listen", NULL
2612             };
2613             if (check_params(chkbuf, sizeof(chkbuf), listen_params, p) < 0) {
2614                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2615                 ret = -1;
2616                 goto out;
2617             }
2618             ret = net_socket_listen_init(vlan, device, name, buf);
2619         } else if (get_param_value(buf, sizeof(buf), "connect", p) > 0) {
2620             static const char * const connect_params[] = {
2621                 "vlan", "name", "connect", NULL
2622             };
2623             if (check_params(chkbuf, sizeof(chkbuf), connect_params, p) < 0) {
2624                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2625                 ret = -1;
2626                 goto out;
2627             }
2628             ret = net_socket_connect_init(vlan, device, name, buf);
2629         } else if (get_param_value(buf, sizeof(buf), "mcast", p) > 0) {
2630             static const char * const mcast_params[] = {
2631                 "vlan", "name", "mcast", NULL
2632             };
2633             if (check_params(chkbuf, sizeof(chkbuf), mcast_params, p) < 0) {
2634                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2635                 ret = -1;
2636                 goto out;
2637             }
2638             ret = net_socket_mcast_init(vlan, device, name, buf);
2639         } else {
2640             config_error(mon, "Unknown socket options: %s\n", p);
2641             ret = -1;
2642             goto out;
2643         }
2644         vlan->nb_host_devs++;
2645     } else
2646 #ifdef CONFIG_VDE
2647     if (!strcmp(device, "vde")) {
2648         static const char * const vde_params[] = {
2649             "vlan", "name", "sock", "port", "group", "mode", NULL
2650         };
2651         char vde_sock[1024], vde_group[512];
2652         int vde_port, vde_mode;
2653
2654         if (check_params(buf, sizeof(buf), vde_params, p) < 0) {
2655             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2656             ret = -1;
2657             goto out;
2658         }
2659         vlan->nb_host_devs++;
2660         if (get_param_value(vde_sock, sizeof(vde_sock), "sock", p) <= 0) {
2661             vde_sock[0] = '\0';
2662         }
2663         if (get_param_value(buf, sizeof(buf), "port", p) > 0) {
2664             vde_port = strtol(buf, NULL, 10);
2665         } else {
2666             vde_port = 0;
2667         }
2668         if (get_param_value(vde_group, sizeof(vde_group), "group", p) <= 0) {
2669             vde_group[0] = '\0';
2670         }
2671         if (get_param_value(buf, sizeof(buf), "mode", p) > 0) {
2672             vde_mode = strtol(buf, NULL, 8);
2673         } else {
2674             vde_mode = 0700;
2675         }
2676         ret = net_vde_init(vlan, device, name, vde_sock, vde_port, vde_group, vde_mode);
2677     } else
2678 #endif
2679     if (!strcmp(device, "dump")) {
2680         int len = 65536;
2681
2682         if (get_param_value(buf, sizeof(buf), "len", p) > 0) {
2683             len = strtol(buf, NULL, 0);
2684         }
2685         if (!get_param_value(buf, sizeof(buf), "file", p)) {
2686             snprintf(buf, sizeof(buf), "qemu-vlan%d.pcap", vlan_id);
2687         }
2688         ret = net_dump_init(mon, vlan, device, name, buf, len);
2689     } else {
2690         config_error(mon, "Unknown network device: %s\n", device);
2691         ret = -1;
2692         goto out;
2693     }
2694     if (ret < 0) {
2695         config_error(mon, "Could not initialize device '%s'\n", device);
2696     }
2697 out:
2698     qemu_free(name);
2699     return ret;
2700 }
2701
2702 void net_client_uninit(NICInfo *nd)
2703 {
2704     nd->vlan->nb_guest_devs--;
2705     nb_nics--;
2706     nd->used = 0;
2707     free((void *)nd->model);
2708 }
2709
2710 static int net_host_check_device(const char *device)
2711 {
2712     int i;
2713     const char *valid_param_list[] = { "tap", "socket", "dump"
2714 #ifdef CONFIG_SLIRP
2715                                        ,"user"
2716 #endif
2717 #ifdef CONFIG_VDE
2718                                        ,"vde"
2719 #endif
2720     };
2721     for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) {
2722         if (!strncmp(valid_param_list[i], device,
2723                      strlen(valid_param_list[i])))
2724             return 1;
2725     }
2726
2727     return 0;
2728 }
2729
2730 void net_host_device_add(Monitor *mon, const char *device, const char *opts)
2731 {
2732     if (!net_host_check_device(device)) {
2733         monitor_printf(mon, "invalid host network device %s\n", device);
2734         return;
2735     }
2736     if (net_client_init(mon, device, opts ? opts : "") < 0) {
2737         monitor_printf(mon, "adding host network device %s failed\n", device);
2738     }
2739 }
2740
2741 void net_host_device_remove(Monitor *mon, int vlan_id, const char *device)
2742 {
2743     VLANState *vlan;
2744     VLANClientState *vc;
2745
2746     vlan = qemu_find_vlan(vlan_id);
2747
2748     for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
2749         if (!strcmp(vc->name, device)) {
2750             break;
2751         }
2752     }
2753
2754     if (!vc) {
2755         monitor_printf(mon, "can't find device %s\n", device);
2756         return;
2757     }
2758     if (!net_host_check_device(vc->model)) {
2759         monitor_printf(mon, "invalid host network device %s\n", device);
2760         return;
2761     }
2762     qemu_del_vlan_client(vc);
2763 }
2764
2765 int net_client_parse(const char *str)
2766 {
2767     const char *p;
2768     char *q;
2769     char device[64];
2770
2771     p = str;
2772     q = device;
2773     while (*p != '\0' && *p != ',') {
2774         if ((q - device) < sizeof(device) - 1)
2775             *q++ = *p;
2776         p++;
2777     }
2778     *q = '\0';
2779     if (*p == ',')
2780         p++;
2781
2782     return net_client_init(NULL, device, p);
2783 }
2784
2785 void net_set_boot_mask(int net_boot_mask)
2786 {
2787     int i;
2788
2789     /* Only the first four NICs may be bootable */
2790     net_boot_mask = net_boot_mask & 0xF;
2791
2792     for (i = 0; i < nb_nics; i++) {
2793         if (net_boot_mask & (1 << i)) {
2794             nd_table[i].bootable = 1;
2795             net_boot_mask &= ~(1 << i);
2796         }
2797     }
2798
2799     if (net_boot_mask) {
2800         fprintf(stderr, "Cannot boot from non-existent NIC\n");
2801         exit(1);
2802     }
2803 }
2804
2805 void do_info_network(Monitor *mon)
2806 {
2807     VLANState *vlan;
2808     VLANClientState *vc;
2809
2810     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2811         monitor_printf(mon, "VLAN %d devices:\n", vlan->id);
2812         for(vc = vlan->first_client; vc != NULL; vc = vc->next)
2813             monitor_printf(mon, "  %s: %s\n", vc->name, vc->info_str);
2814     }
2815 }
2816
2817 int do_set_link(Monitor *mon, const char *name, const char *up_or_down)
2818 {
2819     VLANState *vlan;
2820     VLANClientState *vc = NULL;
2821
2822     for (vlan = first_vlan; vlan != NULL; vlan = vlan->next)
2823         for (vc = vlan->first_client; vc != NULL; vc = vc->next)
2824             if (strcmp(vc->name, name) == 0)
2825                 goto done;
2826 done:
2827
2828     if (!vc) {
2829         monitor_printf(mon, "could not find network device '%s'", name);
2830         return 0;
2831     }
2832
2833     if (strcmp(up_or_down, "up") == 0)
2834         vc->link_down = 0;
2835     else if (strcmp(up_or_down, "down") == 0)
2836         vc->link_down = 1;
2837     else
2838         monitor_printf(mon, "invalid link status '%s'; only 'up' or 'down' "
2839                        "valid\n", up_or_down);
2840
2841     if (vc->link_status_changed)
2842         vc->link_status_changed(vc);
2843
2844     return 1;
2845 }
2846
2847 void net_cleanup(void)
2848 {
2849     VLANState *vlan;
2850
2851     /* close network clients */
2852     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2853         VLANClientState *vc = vlan->first_client;
2854
2855         while (vc) {
2856             VLANClientState *next = vc->next;
2857
2858             qemu_del_vlan_client(vc);
2859
2860             vc = next;
2861         }
2862     }
2863 }
2864
2865 void net_client_check(void)
2866 {
2867     VLANState *vlan;
2868
2869     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2870         if (vlan->nb_guest_devs == 0 && vlan->nb_host_devs == 0)
2871             continue;
2872         if (vlan->nb_guest_devs == 0)
2873             fprintf(stderr, "Warning: vlan %d with no nics\n", vlan->id);
2874         if (vlan->nb_host_devs == 0)
2875             fprintf(stderr,
2876                     "Warning: vlan %d is not connected to host network\n",
2877                     vlan->id);
2878     }
2879 }