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