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 static VLANClientState *
 393 qemu_find_vlan_client_by_name(Monitor *mon, int vlan_id,
 394                               const char *client_str)
 395 {
 396     VLANState *vlan;
 397     VLANClientState *vc;
 398
 399     vlan = qemu_find_vlan(vlan_id, 0);
 400     if (!vlan) {
 401         monitor_printf(mon, "unknown VLAN %d\n", vlan_id);
 402         return NULL;
 403     }
 404
 405     for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
 406         if (!strcmp(vc->name, client_str)) {
 407             break;
 408         }
 409     }
 410     if (!vc) {
 411         monitor_printf(mon, "can't find device %s on VLAN %d\n",
 412                        client_str, vlan_id);
 413     }
 414
 415     return vc;
 416 }
 417
 418 int qemu_can_send_packet(VLANClientState *sender)
 419 {
 420     VLANState *vlan = sender->vlan;
 421     VLANClientState *vc;
 422
 423     for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
 424         if (vc == sender) {
 425             continue;
 426         }
 427
 428         /* no can_receive() handler, they can always receive */
 429         if (!vc->can_receive || vc->can_receive(vc)) {
 430             return 1;
 431         }
 432     }
 433     return 0;
 434 }
 435
 436 static int
 437 qemu_deliver_packet(VLANClientState *sender, const uint8_t *buf, int size)
 438 {
 439     VLANClientState *vc;
 440     int ret = -1;
 441
 442     sender->vlan->delivering = 1;
 443
 444     for (vc = sender->vlan->first_client; vc != NULL; vc = vc->next) {
 445         ssize_t len;
 446
 447         if (vc == sender) {
 448             continue;
 449         }
 450
 451         if (vc->link_down) {
 452             ret = size;
 453             continue;
 454         }
 455
 456         len = vc->receive(vc, buf, size);
 457
 458         ret = (ret >= 0) ? ret : len;
 459     }
 460
 461     sender->vlan->delivering = 0;
 462
 463     return ret;
 464 }
 465
 466 void qemu_purge_queued_packets(VLANClientState *vc)
 467 {
 468     VLANPacket **pp = &vc->vlan->send_queue;
 469
 470     while (*pp != NULL) {
 471         VLANPacket *packet = *pp;
 472
 473         if (packet->sender == vc) {
 474             *pp = packet->next;
 475             qemu_free(packet);
 476         } else {
 477             pp = &packet->next;
 478         }
 479     }
 480 }
 481
 482 void qemu_flush_queued_packets(VLANClientState *vc)
 483 {
 484     VLANPacket *packet;
 485
 486     while ((packet = vc->vlan->send_queue) != NULL) {
 487         int ret;
 488
 489         vc->vlan->send_queue = packet->next;
 490
 491         ret = qemu_deliver_packet(packet->sender, packet->data, packet->size);
 492         if (ret == 0 && packet->sent_cb != NULL) {
 493             packet->next = vc->vlan->send_queue;
 494             vc->vlan->send_queue = packet;
 495             break;
 496         }
 497
 498         if (packet->sent_cb)
 499             packet->sent_cb(packet->sender, ret);
 500
 501         qemu_free(packet);
 502     }
 503 }
 504
 505 static void qemu_enqueue_packet(VLANClientState *sender,
 506                                 const uint8_t *buf, int size,
 507                                 NetPacketSent *sent_cb)
 508 {
 509     VLANPacket *packet;
 510
 511     packet = qemu_malloc(sizeof(VLANPacket) + size);
 512     packet->next = sender->vlan->send_queue;
 513     packet->sender = sender;
 514     packet->size = size;
 515     packet->sent_cb = sent_cb;
 516     memcpy(packet->data, buf, size);
 517     sender->vlan->send_queue = packet;
 518 }
 519
 520 ssize_t qemu_send_packet_async(VLANClientState *sender,
 521                                const uint8_t *buf, int size,
 522                                NetPacketSent *sent_cb)
 523 {
 524     int ret;
 525
 526     if (sender->link_down) {
 527         return size;
 528     }
 529
 530 #ifdef DEBUG_NET
 531     printf("vlan %d send:\n", sender->vlan->id);
 532     hex_dump(stdout, buf, size);
 533 #endif
 534
 535     if (sender->vlan->delivering) {
 536         qemu_enqueue_packet(sender, buf, size, NULL);
 537         return size;
 538     }
 539
 540     ret = qemu_deliver_packet(sender, buf, size);
 541     if (ret == 0 && sent_cb != NULL) {
 542         qemu_enqueue_packet(sender, buf, size, sent_cb);
 543         return 0;
 544     }
 545
 546     qemu_flush_queued_packets(sender);
 547
 548     return ret;
 549 }
 550
 551 void qemu_send_packet(VLANClientState *vc, const uint8_t *buf, int size)
 552 {
 553     qemu_send_packet_async(vc, buf, size, NULL);
 554 }
 555
 556 static ssize_t vc_sendv_compat(VLANClientState *vc, const struct iovec *iov,
 557                                int iovcnt)
 558 {
 559     uint8_t buffer[4096];
 560     size_t offset = 0;
 561     int i;
 562
 563     for (i = 0; i < iovcnt; i++) {
 564         size_t len;
 565
 566         len = MIN(sizeof(buffer) - offset, iov[i].iov_len);
 567         memcpy(buffer + offset, iov[i].iov_base, len);
 568         offset += len;
 569     }
 570
 571     return vc->receive(vc, buffer, offset);
 572 }
 573
 574 static ssize_t calc_iov_length(const struct iovec *iov, int iovcnt)
 575 {
 576     size_t offset = 0;
 577     int i;
 578
 579     for (i = 0; i < iovcnt; i++)
 580         offset += iov[i].iov_len;
 581     return offset;
 582 }
 583
 584 static int qemu_deliver_packet_iov(VLANClientState *sender,
 585                                    const struct iovec *iov, int iovcnt)
 586 {
 587     VLANClientState *vc;
 588     int ret = -1;
 589
 590     sender->vlan->delivering = 1;
 591
 592     for (vc = sender->vlan->first_client; vc != NULL; vc = vc->next) {
 593         ssize_t len;
 594
 595         if (vc == sender) {
 596             continue;
 597         }
 598
 599         if (vc->link_down) {
 600             ret = calc_iov_length(iov, iovcnt);
 601             continue;
 602         }
 603
 604         if (vc->receive_iov) {
 605             len = vc->receive_iov(vc, iov, iovcnt);
 606         } else {
 607             len = vc_sendv_compat(vc, iov, iovcnt);
 608         }
 609
 610         ret = (ret >= 0) ? ret : len;
 611     }
 612
 613     sender->vlan->delivering = 0;
 614
 615     return ret;
 616 }
 617
 618 static ssize_t qemu_enqueue_packet_iov(VLANClientState *sender,
 619                                        const struct iovec *iov, int iovcnt,
 620                                        NetPacketSent *sent_cb)
 621 {
 622     VLANPacket *packet;
 623     size_t max_len = 0;
 624     int i;
 625
 626     max_len = calc_iov_length(iov, iovcnt);
 627
 628     packet = qemu_malloc(sizeof(VLANPacket) + max_len);
 629     packet->next = sender->vlan->send_queue;
 630     packet->sender = sender;
 631     packet->sent_cb = sent_cb;
 632     packet->size = 0;
 633
 634     for (i = 0; i < iovcnt; i++) {
 635         size_t len = iov[i].iov_len;
 636
 637         memcpy(packet->data + packet->size, iov[i].iov_base, len);
 638         packet->size += len;
 639     }
 640
 641     sender->vlan->send_queue = packet;
 642
 643     return packet->size;
 644 }
 645
 646 ssize_t qemu_sendv_packet_async(VLANClientState *sender,
 647                                 const struct iovec *iov, int iovcnt,
 648                                 NetPacketSent *sent_cb)
 649 {
 650     int ret;
 651
 652     if (sender->link_down) {
 653         return calc_iov_length(iov, iovcnt);
 654     }
 655
 656     if (sender->vlan->delivering) {
 657         return qemu_enqueue_packet_iov(sender, iov, iovcnt, NULL);
 658     }
 659
 660     ret = qemu_deliver_packet_iov(sender, iov, iovcnt);
 661     if (ret == 0 && sent_cb != NULL) {
 662         qemu_enqueue_packet_iov(sender, iov, iovcnt, sent_cb);
 663         return 0;
 664     }
 665
 666     qemu_flush_queued_packets(sender);
 667
 668     return ret;
 669 }
 670
 671 ssize_t
 672 qemu_sendv_packet(VLANClientState *vc, const struct iovec *iov, int iovcnt)
 673 {
 674     return qemu_sendv_packet_async(vc, iov, iovcnt, NULL);
 675 }
 676
 677 static void config_error(Monitor *mon, const char *fmt, ...)
 678 {
 679     va_list ap;
 680
 681     va_start(ap, fmt);
 682     if (mon) {
 683         monitor_vprintf(mon, fmt, ap);
 684     } else {
 685         fprintf(stderr, "qemu: ");
 686         vfprintf(stderr, fmt, ap);
 687         exit(1);
 688     }
 689     va_end(ap);
 690 }
 691
 692 #if defined(CONFIG_SLIRP)
 693
 694 /* slirp network adapter */
 695
 696 #define SLIRP_CFG_HOSTFWD 1
 697 #define SLIRP_CFG_LEGACY  2
 698
 699 struct slirp_config_str {
 700     struct slirp_config_str *next;
 701     int flags;
 702     char str[1024];
 703     int legacy_format;
 704 };
 705
 706 typedef struct SlirpState {
 707     TAILQ_ENTRY(SlirpState) entry;
 708     VLANClientState *vc;
 709     Slirp *slirp;
 710 #ifndef _WIN32
 711     char smb_dir[128];
 712 #endif
 713 } SlirpState;
 714
 715 static struct slirp_config_str *slirp_configs;
 716 const char *legacy_tftp_prefix;
 717 const char *legacy_bootp_filename;
 718 static TAILQ_HEAD(slirp_stacks, SlirpState) slirp_stacks =
 719     TAILQ_HEAD_INITIALIZER(slirp_stacks);
 720
 721 static void slirp_hostfwd(SlirpState *s, Monitor *mon, const char *redir_str,
 722                           int legacy_format);
 723 static void slirp_guestfwd(SlirpState *s, Monitor *mon, const char *config_str,
 724                            int legacy_format);
 725
 726 #ifndef _WIN32
 727 static const char *legacy_smb_export;
 728
 729 static void slirp_smb(SlirpState *s, Monitor *mon, const char *exported_dir,
 730                       struct in_addr vserver_addr);
 731 static void slirp_smb_cleanup(SlirpState *s);
 732 #else
 733 static inline void slirp_smb_cleanup(SlirpState *s) { }
 734 #endif
 735
 736 int slirp_can_output(void *opaque)
 737 {
 738     SlirpState *s = opaque;
 739
 740     return qemu_can_send_packet(s->vc);
 741 }
 742
 743 void slirp_output(void *opaque, const uint8_t *pkt, int pkt_len)
 744 {
 745     SlirpState *s = opaque;
 746
 747 #ifdef DEBUG_SLIRP
 748     printf("slirp output:\n");
 749     hex_dump(stdout, pkt, pkt_len);
 750 #endif
 751     qemu_send_packet(s->vc, pkt, pkt_len);
 752 }
 753
 754 static ssize_t slirp_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
 755 {
 756     SlirpState *s = vc->opaque;
 757
 758 #ifdef DEBUG_SLIRP
 759     printf("slirp input:\n");
 760     hex_dump(stdout, buf, size);
 761 #endif
 762     slirp_input(s->slirp, buf, size);
 763     return size;
 764 }
 765
 766 static void net_slirp_cleanup(VLANClientState *vc)
 767 {
 768     SlirpState *s = vc->opaque;
 769
 770     slirp_cleanup(s->slirp);
 771     slirp_smb_cleanup(s);
 772     TAILQ_REMOVE(&slirp_stacks, s, entry);
 773     qemu_free(s);
 774 }
 775
 776 static int net_slirp_init(Monitor *mon, VLANState *vlan, const char *model,
 777                           const char *name, int restricted,
 778                           const char *vnetwork, const char *vhost,
 779                           const char *vhostname, const char *tftp_export,
 780                           const char *bootfile, const char *vdhcp_start,
 781                           const char *vnameserver, const char *smb_export,
 782                           const char *vsmbserver)
 783 {
 784     /* default settings according to historic slirp */
 785     struct in_addr net  = { .s_addr = htonl(0x0a000000) }; /* 10.0.0.0 */
 786     struct in_addr mask = { .s_addr = htonl(0xff000000) }; /* 255.0.0.0 */
 787     struct in_addr host = { .s_addr = htonl(0x0a000202) }; /* 10.0.2.2 */
 788     struct in_addr dhcp = { .s_addr = htonl(0x0a00020f) }; /* 10.0.2.15 */
 789     struct in_addr dns  = { .s_addr = htonl(0x0a000203) }; /* 10.0.2.3 */
 790 #ifndef _WIN32
 791     struct in_addr smbsrv = { .s_addr = 0 };
 792 #endif
 793     SlirpState *s;
 794     char buf[20];
 795     uint32_t addr;
 796     int shift;
 797     char *end;
 798
 799     if (!tftp_export) {
 800         tftp_export = legacy_tftp_prefix;
 801     }
 802     if (!bootfile) {
 803         bootfile = legacy_bootp_filename;
 804     }
 805
 806     if (vnetwork) {
 807         if (get_str_sep(buf, sizeof(buf), &vnetwork, '/') < 0) {
 808             if (!inet_aton(vnetwork, &net)) {
 809                 return -1;
 810             }
 811             addr = ntohl(net.s_addr);
 812             if (!(addr & 0x80000000)) {
 813                 mask.s_addr = htonl(0xff000000); /* class A */
 814             } else if ((addr & 0xfff00000) == 0xac100000) {
 815                 mask.s_addr = htonl(0xfff00000); /* priv. 172.16.0.0/12 */
 816             } else if ((addr & 0xc0000000) == 0x80000000) {
 817                 mask.s_addr = htonl(0xffff0000); /* class B */
 818             } else if ((addr & 0xffff0000) == 0xc0a80000) {
 819                 mask.s_addr = htonl(0xffff0000); /* priv. 192.168.0.0/16 */
 820             } else if ((addr & 0xffff0000) == 0xc6120000) {
 821                 mask.s_addr = htonl(0xfffe0000); /* tests 198.18.0.0/15 */
 822             } else if ((addr & 0xe0000000) == 0xe0000000) {
 823                 mask.s_addr = htonl(0xffffff00); /* class C */
 824             } else {
 825                 mask.s_addr = htonl(0xfffffff0); /* multicast/reserved */
 826             }
 827         } else {
 828             if (!inet_aton(buf, &net)) {
 829                 return -1;
 830             }
 831             shift = strtol(vnetwork, &end, 10);
 832             if (*end != '\0') {
 833                 if (!inet_aton(vnetwork, &mask)) {
 834                     return -1;
 835                 }
 836             } else if (shift < 4 || shift > 32) {
 837                 return -1;
 838             } else {
 839                 mask.s_addr = htonl(0xffffffff << (32 - shift));
 840             }
 841         }
 842         net.s_addr &= mask.s_addr;
 843         host.s_addr = net.s_addr | (htonl(0x0202) & ~mask.s_addr);
 844         dhcp.s_addr = net.s_addr | (htonl(0x020f) & ~mask.s_addr);
 845         dns.s_addr  = net.s_addr | (htonl(0x0203) & ~mask.s_addr);
 846     }
 847
 848     if (vhost && !inet_aton(vhost, &host)) {
 849         return -1;
 850     }
 851     if ((host.s_addr & mask.s_addr) != net.s_addr) {
 852         return -1;
 853     }
 854
 855     if (vdhcp_start && !inet_aton(vdhcp_start, &dhcp)) {
 856         return -1;
 857     }
 858     if ((dhcp.s_addr & mask.s_addr) != net.s_addr ||
 859         dhcp.s_addr == host.s_addr || dhcp.s_addr == dns.s_addr) {
 860         return -1;
 861     }
 862
 863     if (vnameserver && !inet_aton(vnameserver, &dns)) {
 864         return -1;
 865     }
 866     if ((dns.s_addr & mask.s_addr) != net.s_addr ||
 867         dns.s_addr == host.s_addr) {
 868         return -1;
 869     }
 870
 871 #ifndef _WIN32
 872     if (vsmbserver && !inet_aton(vsmbserver, &smbsrv)) {
 873         return -1;
 874     }
 875 #endif
 876
 877     s = qemu_mallocz(sizeof(SlirpState));
 878     s->slirp = slirp_init(restricted, net, mask, host, vhostname,
 879                           tftp_export, bootfile, dhcp, dns, s);
 880     TAILQ_INSERT_TAIL(&slirp_stacks, s, entry);
 881
 882     while (slirp_configs) {
 883         struct slirp_config_str *config = slirp_configs;
 884
 885         if (config->flags & SLIRP_CFG_HOSTFWD) {
 886             slirp_hostfwd(s, mon, config->str,
 887                           config->flags & SLIRP_CFG_LEGACY);
 888         } else {
 889             slirp_guestfwd(s, mon, config->str,
 890                            config->flags & SLIRP_CFG_LEGACY);
 891         }
 892         slirp_configs = config->next;
 893         qemu_free(config);
 894     }
 895 #ifndef _WIN32
 896     if (!smb_export) {
 897         smb_export = legacy_smb_export;
 898     }
 899     if (smb_export) {
 900         slirp_smb(s, mon, smb_export, smbsrv);
 901     }
 902 #endif
 903
 904     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, slirp_receive, NULL,
 905                                  net_slirp_cleanup, s);
 906     s->vc->info_str[0] = '\0';
 907     return 0;
 908 }
 909
 910 static SlirpState *slirp_lookup(Monitor *mon, const char *vlan,
 911                                 const char *stack)
 912 {
 913     VLANClientState *vc;
 914
 915     if (vlan) {
 916         vc = qemu_find_vlan_client_by_name(mon, strtol(vlan, NULL, 0), stack);
 917         if (!vc) {
 918             return NULL;
 919         }
 920         if (strcmp(vc->model, "user")) {
 921             monitor_printf(mon, "invalid device specified\n");
 922             return NULL;
 923         }
 924         return vc->opaque;
 925     } else {
 926         if (TAILQ_EMPTY(&slirp_stacks)) {
 927             monitor_printf(mon, "user mode network stack not in use\n");
 928             return NULL;
 929         }
 930         return TAILQ_FIRST(&slirp_stacks);
 931     }
 932 }
 933
 934 void net_slirp_hostfwd_remove(Monitor *mon, const char *arg1,
 935                               const char *arg2, const char *arg3)
 936 {
 937     struct in_addr host_addr = { .s_addr = INADDR_ANY };
 938     int host_port;
 939     char buf[256] = "";
 940     const char *src_str, *p;
 941     SlirpState *s;
 942     int is_udp = 0;
 943     int err;
 944
 945     if (arg2) {
 946         s = slirp_lookup(mon, arg1, arg2);
 947         src_str = arg3;
 948     } else {
 949         s = slirp_lookup(mon, NULL, NULL);
 950         src_str = arg1;
 951     }
 952     if (!s) {
 953         return;
 954     }
 955
 956     if (!src_str || !src_str[0])
 957         goto fail_syntax;
 958
 959     p = src_str;
 960     get_str_sep(buf, sizeof(buf), &p, ':');
 961
 962     if (!strcmp(buf, "tcp") || buf[0] == '\0') {
 963         is_udp = 0;
 964     } else if (!strcmp(buf, "udp")) {
 965         is_udp = 1;
 966     } else {
 967         goto fail_syntax;
 968     }
 969
 970     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 971         goto fail_syntax;
 972     }
 973     if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
 974         goto fail_syntax;
 975     }
 976
 977     host_port = atoi(p);
 978
 979     err = slirp_remove_hostfwd(TAILQ_FIRST(&slirp_stacks)->slirp, is_udp,
 980                                host_addr, host_port);
 981
 982     monitor_printf(mon, "host forwarding rule for %s %s\n", src_str,
 983                    err ? "removed" : "not found");
 984     return;
 985
 986  fail_syntax:
 987     monitor_printf(mon, "invalid format\n");
 988 }
 989
 990 static void slirp_hostfwd(SlirpState *s, Monitor *mon, const char *redir_str,
 991                           int legacy_format)
 992 {
 993     struct in_addr host_addr = { .s_addr = INADDR_ANY };
 994     struct in_addr guest_addr = { .s_addr = 0 };
 995     int host_port, guest_port;
 996     const char *p;
 997     char buf[256];
 998     int is_udp;
 999     char *end;
1000
1001     p = redir_str;
1002     if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1003         goto fail_syntax;
1004     }
1005     if (!strcmp(buf, "tcp") || buf[0] == '\0') {
1006         is_udp = 0;
1007     } else if (!strcmp(buf, "udp")) {
1008         is_udp = 1;
1009     } else {
1010         goto fail_syntax;
1011     }
1012
1013     if (!legacy_format) {
1014         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1015             goto fail_syntax;
1016         }
1017         if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
1018             goto fail_syntax;
1019         }
1020     }
1021
1022     if (get_str_sep(buf, sizeof(buf), &p, legacy_format ? ':' : '-') < 0) {
1023         goto fail_syntax;
1024     }
1025     host_port = strtol(buf, &end, 0);
1026     if (*end != '\0' || host_port < 1 || host_port > 65535) {
1027         goto fail_syntax;
1028     }
1029
1030     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1031         goto fail_syntax;
1032     }
1033     if (buf[0] != '\0' && !inet_aton(buf, &guest_addr)) {
1034         goto fail_syntax;
1035     }
1036
1037     guest_port = strtol(p, &end, 0);
1038     if (*end != '\0' || guest_port < 1 || guest_port > 65535) {
1039         goto fail_syntax;
1040     }
1041
1042     if (slirp_add_hostfwd(s->slirp, is_udp, host_addr, host_port, guest_addr,
1043                           guest_port) < 0) {
1044         config_error(mon, "could not set up host forwarding rule '%s'\n",
1045                      redir_str);
1046     }
1047     return;
1048
1049  fail_syntax:
1050     config_error(mon, "invalid host forwarding rule '%s'\n", redir_str);
1051 }
1052
1053 void net_slirp_hostfwd_add(Monitor *mon, const char *arg1,
1054                            const char *arg2, const char *arg3)
1055 {
1056     const char *redir_str;
1057     SlirpState *s;
1058
1059     if (arg2) {
1060         s = slirp_lookup(mon, arg1, arg2);
1061         redir_str = arg3;
1062     } else {
1063         s = slirp_lookup(mon, NULL, NULL);
1064         redir_str = arg1;
1065     }
1066     if (s) {
1067         slirp_hostfwd(s, mon, redir_str, 0);
1068     }
1069
1070 }
1071
1072 void net_slirp_redir(const char *redir_str)
1073 {
1074     struct slirp_config_str *config;
1075
1076     if (TAILQ_EMPTY(&slirp_stacks)) {
1077         config = qemu_malloc(sizeof(*config));
1078         pstrcpy(config->str, sizeof(config->str), redir_str);
1079         config->flags = SLIRP_CFG_HOSTFWD | SLIRP_CFG_LEGACY;
1080         config->next = slirp_configs;
1081         slirp_configs = config;
1082         return;
1083     }
1084
1085     slirp_hostfwd(TAILQ_FIRST(&slirp_stacks), NULL, redir_str, 1);
1086 }
1087
1088 #ifndef _WIN32
1089
1090 /* automatic user mode samba server configuration */
1091 static void slirp_smb_cleanup(SlirpState *s)
1092 {
1093     char cmd[128];
1094
1095     if (s->smb_dir[0] != '\0') {
1096         snprintf(cmd, sizeof(cmd), "rm -rf %s", s->smb_dir);
1097         system(cmd);
1098         s->smb_dir[0] = '\0';
1099     }
1100 }
1101
1102 static void slirp_smb(SlirpState* s, Monitor *mon, const char *exported_dir,
1103                       struct in_addr vserver_addr)
1104 {
1105     static int instance;
1106     char smb_conf[128];
1107     char smb_cmdline[128];
1108     FILE *f;
1109
1110     snprintf(s->smb_dir, sizeof(s->smb_dir), "/tmp/qemu-smb.%ld-%d",
1111              (long)getpid(), instance++);
1112     if (mkdir(s->smb_dir, 0700) < 0) {
1113         config_error(mon, "could not create samba server dir '%s'\n",
1114                      s->smb_dir);
1115         return;
1116     }
1117     snprintf(smb_conf, sizeof(smb_conf), "%s/%s", s->smb_dir, "smb.conf");
1118
1119     f = fopen(smb_conf, "w");
1120     if (!f) {
1121         slirp_smb_cleanup(s);
1122         config_error(mon, "could not create samba server "
1123                      "configuration file '%s'\n", smb_conf);
1124         return;
1125     }
1126     fprintf(f,
1127             "[global]\n"
1128             "private dir=%s\n"
1129             "smb ports=0\n"
1130             "socket address=127.0.0.1\n"
1131             "pid directory=%s\n"
1132             "lock directory=%s\n"
1133             "log file=%s/log.smbd\n"
1134             "smb passwd file=%s/smbpasswd\n"
1135             "security = share\n"
1136             "[qemu]\n"
1137             "path=%s\n"
1138             "read only=no\n"
1139             "guest ok=yes\n",
1140             s->smb_dir,
1141             s->smb_dir,
1142             s->smb_dir,
1143             s->smb_dir,
1144             s->smb_dir,
1145             exported_dir
1146             );
1147     fclose(f);
1148
1149     snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -s %s",
1150              SMBD_COMMAND, smb_conf);
1151
1152     if (slirp_add_exec(s->slirp, 0, smb_cmdline, vserver_addr, 139) < 0) {
1153         slirp_smb_cleanup(s);
1154         config_error(mon, "conflicting/invalid smbserver address\n");
1155     }
1156 }
1157
1158 /* automatic user mode samba server configuration (legacy interface) */
1159 void net_slirp_smb(const char *exported_dir)
1160 {
1161     struct in_addr vserver_addr = { .s_addr = 0 };
1162
1163     if (legacy_smb_export) {
1164         fprintf(stderr, "-smb given twice\n");
1165         exit(1);
1166     }
1167     legacy_smb_export = exported_dir;
1168     if (!TAILQ_EMPTY(&slirp_stacks)) {
1169         slirp_smb(TAILQ_FIRST(&slirp_stacks), NULL, exported_dir,
1170                   vserver_addr);
1171     }
1172 }
1173
1174 #endif /* !defined(_WIN32) */
1175
1176 struct GuestFwd {
1177     CharDriverState *hd;
1178     struct in_addr server;
1179     int port;
1180     Slirp *slirp;
1181 };
1182
1183 static int guestfwd_can_read(void *opaque)
1184 {
1185     struct GuestFwd *fwd = opaque;
1186     return slirp_socket_can_recv(fwd->slirp, fwd->server, fwd->port);
1187 }
1188
1189 static void guestfwd_read(void *opaque, const uint8_t *buf, int size)
1190 {
1191     struct GuestFwd *fwd = opaque;
1192     slirp_socket_recv(fwd->slirp, fwd->server, fwd->port, buf, size);
1193 }
1194
1195 static void slirp_guestfwd(SlirpState *s, Monitor *mon, const char *config_str,
1196                            int legacy_format)
1197 {
1198     struct in_addr server = { .s_addr = 0 };
1199     struct GuestFwd *fwd;
1200     const char *p;
1201     char buf[128];
1202     char *end;
1203     int port;
1204
1205     p = config_str;
1206     if (legacy_format) {
1207         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1208             goto fail_syntax;
1209         }
1210     } else {
1211         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1212             goto fail_syntax;
1213         }
1214         if (strcmp(buf, "tcp") && buf[0] != '\0') {
1215             goto fail_syntax;
1216         }
1217         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1218             goto fail_syntax;
1219         }
1220         if (buf[0] != '\0' && !inet_aton(buf, &server)) {
1221             goto fail_syntax;
1222         }
1223         if (get_str_sep(buf, sizeof(buf), &p, '-') < 0) {
1224             goto fail_syntax;
1225         }
1226     }
1227     port = strtol(buf, &end, 10);
1228     if (*end != '\0' || port < 1 || port > 65535) {
1229         goto fail_syntax;
1230     }
1231
1232     fwd = qemu_malloc(sizeof(struct GuestFwd));
1233     snprintf(buf, sizeof(buf), "guestfwd.tcp:%d", port);
1234     fwd->hd = qemu_chr_open(buf, p, NULL);
1235     if (!fwd->hd) {
1236         config_error(mon, "could not open guest forwarding device '%s'\n",
1237                      buf);
1238         qemu_free(fwd);
1239         return;
1240     }
1241     fwd->server = server;
1242     fwd->port = port;
1243     fwd->slirp = s->slirp;
1244
1245     if (slirp_add_exec(s->slirp, 3, fwd->hd, server, port) < 0) {
1246         config_error(mon, "conflicting/invalid host:port in guest forwarding "
1247                      "rule '%s'\n", config_str);
1248         qemu_free(fwd);
1249         return;
1250     }
1251     qemu_chr_add_handlers(fwd->hd, guestfwd_can_read, guestfwd_read,
1252                           NULL, fwd);
1253     return;
1254
1255  fail_syntax:
1256     config_error(mon, "invalid guest forwarding rule '%s'\n", config_str);
1257 }
1258
1259 void do_info_usernet(Monitor *mon)
1260 {
1261     SlirpState *s;
1262
1263     TAILQ_FOREACH(s, &slirp_stacks, entry) {
1264         monitor_printf(mon, "VLAN %d (%s):\n", s->vc->vlan->id, s->vc->name);
1265         slirp_connection_info(s->slirp, mon);
1266     }
1267 }
1268
1269 #endif /* CONFIG_SLIRP */
1270
1271 #if !defined(_WIN32)
1272
1273 typedef struct TAPState {
1274     VLANClientState *vc;
1275     int fd;
1276     char down_script[1024];
1277     char down_script_arg[128];
1278     uint8_t buf[4096];
1279     unsigned int read_poll : 1;
1280     unsigned int write_poll : 1;
1281 } TAPState;
1282
1283 static int launch_script(const char *setup_script, const char *ifname, int fd);
1284
1285 static int tap_can_send(void *opaque);
1286 static void tap_send(void *opaque);
1287 static void tap_writable(void *opaque);
1288
1289 static void tap_update_fd_handler(TAPState *s)
1290 {
1291     qemu_set_fd_handler2(s->fd,
1292                          s->read_poll  ? tap_can_send : NULL,
1293                          s->read_poll  ? tap_send     : NULL,
1294                          s->write_poll ? tap_writable : NULL,
1295                          s);
1296 }
1297
1298 static void tap_read_poll(TAPState *s, int enable)
1299 {
1300     s->read_poll = !!enable;
1301     tap_update_fd_handler(s);
1302 }
1303
1304 static void tap_write_poll(TAPState *s, int enable)
1305 {
1306     s->write_poll = !!enable;
1307     tap_update_fd_handler(s);
1308 }
1309
1310 static void tap_writable(void *opaque)
1311 {
1312     TAPState *s = opaque;
1313
1314     tap_write_poll(s, 0);
1315
1316     qemu_flush_queued_packets(s->vc);
1317 }
1318
1319 static ssize_t tap_receive_iov(VLANClientState *vc, const struct iovec *iov,
1320                                int iovcnt)
1321 {
1322     TAPState *s = vc->opaque;
1323     ssize_t len;
1324
1325     do {
1326         len = writev(s->fd, iov, iovcnt);
1327     } while (len == -1 && errno == EINTR);
1328
1329     if (len == -1 && errno == EAGAIN) {
1330         tap_write_poll(s, 1);
1331         return 0;
1332     }
1333
1334     return len;
1335 }
1336
1337 static ssize_t tap_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1338 {
1339     TAPState *s = vc->opaque;
1340     ssize_t len;
1341
1342     do {
1343         len = write(s->fd, buf, size);
1344     } while (len == -1 && (errno == EINTR || errno == EAGAIN));
1345
1346     return len;
1347 }
1348
1349 static int tap_can_send(void *opaque)
1350 {
1351     TAPState *s = opaque;
1352
1353     return qemu_can_send_packet(s->vc);
1354 }
1355
1356 #ifdef __sun__
1357 static ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
1358 {
1359     struct strbuf sbuf;
1360     int f = 0;
1361
1362     sbuf.maxlen = maxlen;
1363     sbuf.buf = (char *)buf;
1364
1365     return getmsg(tapfd, NULL, &sbuf, &f) >= 0 ? sbuf.len : -1;
1366 }
1367 #else
1368 static ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
1369 {
1370     return read(tapfd, buf, maxlen);
1371 }
1372 #endif
1373
1374 static void tap_send_completed(VLANClientState *vc, ssize_t len)
1375 {
1376     TAPState *s = vc->opaque;
1377     tap_read_poll(s, 1);
1378 }
1379
1380 static void tap_send(void *opaque)
1381 {
1382     TAPState *s = opaque;
1383     int size;
1384
1385     do {
1386         size = tap_read_packet(s->fd, s->buf, sizeof(s->buf));
1387         if (size <= 0) {
1388             break;
1389         }
1390
1391         size = qemu_send_packet_async(s->vc, s->buf, size, tap_send_completed);
1392         if (size == 0) {
1393             tap_read_poll(s, 0);
1394         }
1395     } while (size > 0);
1396 }
1397
1398 static void tap_set_sndbuf(TAPState *s, int sndbuf, Monitor *mon)
1399 {
1400 #ifdef TUNSETSNDBUF
1401     if (ioctl(s->fd, TUNSETSNDBUF, &sndbuf) == -1) {
1402         config_error(mon, "TUNSETSNDBUF ioctl failed: %s\n",
1403                      strerror(errno));
1404     }
1405 #else
1406     config_error(mon, "No '-net tap,sndbuf=<nbytes>' support available\n");
1407 #endif
1408 }
1409
1410 static void tap_cleanup(VLANClientState *vc)
1411 {
1412     TAPState *s = vc->opaque;
1413
1414     qemu_purge_queued_packets(vc);
1415
1416     if (s->down_script[0])
1417         launch_script(s->down_script, s->down_script_arg, s->fd);
1418
1419     tap_read_poll(s, 0);
1420     tap_write_poll(s, 0);
1421     close(s->fd);
1422     qemu_free(s);
1423 }
1424
1425 /* fd support */
1426
1427 static TAPState *net_tap_fd_init(VLANState *vlan,
1428                                  const char *model,
1429                                  const char *name,
1430                                  int fd)
1431 {
1432     TAPState *s;
1433
1434     s = qemu_mallocz(sizeof(TAPState));
1435     s->fd = fd;
1436     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, tap_receive,
1437                                  tap_receive_iov, tap_cleanup, s);
1438     tap_read_poll(s, 1);
1439     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "fd=%d", fd);
1440     return s;
1441 }
1442
1443 #if defined (HOST_BSD) || defined (__FreeBSD_kernel__)
1444 static int tap_open(char *ifname, int ifname_size)
1445 {
1446     int fd;
1447     char *dev;
1448     struct stat s;
1449
1450     TFR(fd = open("/dev/tap", O_RDWR));
1451     if (fd < 0) {
1452         fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n");
1453         return -1;
1454     }
1455
1456     fstat(fd, &s);
1457     dev = devname(s.st_rdev, S_IFCHR);
1458     pstrcpy(ifname, ifname_size, dev);
1459
1460     fcntl(fd, F_SETFL, O_NONBLOCK);
1461     return fd;
1462 }
1463 #elif defined(__sun__)
1464 #define TUNNEWPPA       (('T'<<16) | 0x0001)
1465 /*
1466  * Allocate TAP device, returns opened fd.
1467  * Stores dev name in the first arg(must be large enough).
1468  */
1469 static int tap_alloc(char *dev, size_t dev_size)
1470 {
1471     int tap_fd, if_fd, ppa = -1;
1472     static int ip_fd = 0;
1473     char *ptr;
1474
1475     static int arp_fd = 0;
1476     int ip_muxid, arp_muxid;
1477     struct strioctl  strioc_if, strioc_ppa;
1478     int link_type = I_PLINK;;
1479     struct lifreq ifr;
1480     char actual_name[32] = "";
1481
1482     memset(&ifr, 0x0, sizeof(ifr));
1483
1484     if( *dev ){
1485        ptr = dev;
1486        while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
1487        ppa = atoi(ptr);
1488     }
1489
1490     /* Check if IP device was opened */
1491     if( ip_fd )
1492        close(ip_fd);
1493
1494     TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
1495     if (ip_fd < 0) {
1496        syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)");
1497        return -1;
1498     }
1499
1500     TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
1501     if (tap_fd < 0) {
1502        syslog(LOG_ERR, "Can't open /dev/tap");
1503        return -1;
1504     }
1505
1506     /* Assign a new PPA and get its unit number. */
1507     strioc_ppa.ic_cmd = TUNNEWPPA;
1508     strioc_ppa.ic_timout = 0;
1509     strioc_ppa.ic_len = sizeof(ppa);
1510     strioc_ppa.ic_dp = (char *)&ppa;
1511     if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
1512        syslog (LOG_ERR, "Can't assign new interface");
1513
1514     TFR(if_fd = open("/dev/tap", O_RDWR, 0));
1515     if (if_fd < 0) {
1516        syslog(LOG_ERR, "Can't open /dev/tap (2)");
1517        return -1;
1518     }
1519     if(ioctl(if_fd, I_PUSH, "ip") < 0){
1520        syslog(LOG_ERR, "Can't push IP module");
1521        return -1;
1522     }
1523
1524     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
1525         syslog(LOG_ERR, "Can't get flags\n");
1526
1527     snprintf (actual_name, 32, "tap%d", ppa);
1528     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
1529
1530     ifr.lifr_ppa = ppa;
1531     /* Assign ppa according to the unit number returned by tun device */
1532
1533     if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
1534         syslog (LOG_ERR, "Can't set PPA %d", ppa);
1535     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
1536         syslog (LOG_ERR, "Can't get flags\n");
1537     /* Push arp module to if_fd */
1538     if (ioctl (if_fd, I_PUSH, "arp") < 0)
1539         syslog (LOG_ERR, "Can't push ARP module (2)");
1540
1541     /* Push arp module to ip_fd */
1542     if (ioctl (ip_fd, I_POP, NULL) < 0)
1543         syslog (LOG_ERR, "I_POP failed\n");
1544     if (ioctl (ip_fd, I_PUSH, "arp") < 0)
1545         syslog (LOG_ERR, "Can't push ARP module (3)\n");
1546     /* Open arp_fd */
1547     TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
1548     if (arp_fd < 0)
1549        syslog (LOG_ERR, "Can't open %s\n", "/dev/tap");
1550
1551     /* Set ifname to arp */
1552     strioc_if.ic_cmd = SIOCSLIFNAME;
1553     strioc_if.ic_timout = 0;
1554     strioc_if.ic_len = sizeof(ifr);
1555     strioc_if.ic_dp = (char *)&ifr;
1556     if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
1557         syslog (LOG_ERR, "Can't set ifname to arp\n");
1558     }
1559
1560     if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
1561        syslog(LOG_ERR, "Can't link TAP device to IP");
1562        return -1;
1563     }
1564
1565     if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
1566         syslog (LOG_ERR, "Can't link TAP device to ARP");
1567
1568     close (if_fd);
1569
1570     memset(&ifr, 0x0, sizeof(ifr));
1571     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
1572     ifr.lifr_ip_muxid  = ip_muxid;
1573     ifr.lifr_arp_muxid = arp_muxid;
1574
1575     if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
1576     {
1577       ioctl (ip_fd, I_PUNLINK , arp_muxid);
1578       ioctl (ip_fd, I_PUNLINK, ip_muxid);
1579       syslog (LOG_ERR, "Can't set multiplexor id");
1580     }
1581
1582     snprintf(dev, dev_size, "tap%d", ppa);
1583     return tap_fd;
1584 }
1585
1586 static int tap_open(char *ifname, int ifname_size)
1587 {
1588     char  dev[10]="";
1589     int fd;
1590     if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){
1591        fprintf(stderr, "Cannot allocate TAP device\n");
1592        return -1;
1593     }
1594     pstrcpy(ifname, ifname_size, dev);
1595     fcntl(fd, F_SETFL, O_NONBLOCK);
1596     return fd;
1597 }
1598 #elif defined (_AIX)
1599 static int tap_open(char *ifname, int ifname_size)
1600 {
1601     fprintf (stderr, "no tap on AIX\n");
1602     return -1;
1603 }
1604 #else
1605 static int tap_open(char *ifname, int ifname_size)
1606 {
1607     struct ifreq ifr;
1608     int fd, ret;
1609
1610     TFR(fd = open("/dev/net/tun", O_RDWR));
1611     if (fd < 0) {
1612         fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n");
1613         return -1;
1614     }
1615     memset(&ifr, 0, sizeof(ifr));
1616     ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
1617     if (ifname[0] != '\0')
1618         pstrcpy(ifr.ifr_name, IFNAMSIZ, ifname);
1619     else
1620         pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d");
1621     ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
1622     if (ret != 0) {
1623         fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n");
1624         close(fd);
1625         return -1;
1626     }
1627     pstrcpy(ifname, ifname_size, ifr.ifr_name);
1628     fcntl(fd, F_SETFL, O_NONBLOCK);
1629     return fd;
1630 }
1631 #endif
1632
1633 static int launch_script(const char *setup_script, const char *ifname, int fd)
1634 {
1635     sigset_t oldmask, mask;
1636     int pid, status;
1637     char *args[3];
1638     char **parg;
1639
1640     sigemptyset(&mask);
1641     sigaddset(&mask, SIGCHLD);
1642     sigprocmask(SIG_BLOCK, &mask, &oldmask);
1643
1644     /* try to launch network script */
1645     pid = fork();
1646     if (pid == 0) {
1647         int open_max = sysconf(_SC_OPEN_MAX), i;
1648
1649         for (i = 0; i < open_max; i++) {
1650             if (i != STDIN_FILENO &&
1651                 i != STDOUT_FILENO &&
1652                 i != STDERR_FILENO &&
1653                 i != fd) {
1654                 close(i);
1655             }
1656         }
1657         parg = args;
1658         *parg++ = (char *)setup_script;
1659         *parg++ = (char *)ifname;
1660         *parg++ = NULL;
1661         execv(setup_script, args);
1662         _exit(1);
1663     } else if (pid > 0) {
1664         while (waitpid(pid, &status, 0) != pid) {
1665             /* loop */
1666         }
1667         sigprocmask(SIG_SETMASK, &oldmask, NULL);
1668
1669         if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
1670             return 0;
1671         }
1672     }
1673     fprintf(stderr, "%s: could not launch network script\n", setup_script);
1674     return -1;
1675 }
1676
1677 static TAPState *net_tap_init(VLANState *vlan, const char *model,
1678                               const char *name, const char *ifname1,
1679                               const char *setup_script, const char *down_script)
1680 {
1681     TAPState *s;
1682     int fd;
1683     char ifname[128];
1684
1685     if (ifname1 != NULL)
1686         pstrcpy(ifname, sizeof(ifname), ifname1);
1687     else
1688         ifname[0] = '\0';
1689     TFR(fd = tap_open(ifname, sizeof(ifname)));
1690     if (fd < 0)
1691         return NULL;
1692
1693     if (!setup_script || !strcmp(setup_script, "no"))
1694         setup_script = "";
1695     if (setup_script[0] != '\0' &&
1696         launch_script(setup_script, ifname, fd)) {
1697         return NULL;
1698     }
1699     s = net_tap_fd_init(vlan, model, name, fd);
1700     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1701              "ifname=%s,script=%s,downscript=%s",
1702              ifname, setup_script, down_script);
1703     if (down_script && strcmp(down_script, "no")) {
1704         snprintf(s->down_script, sizeof(s->down_script), "%s", down_script);
1705         snprintf(s->down_script_arg, sizeof(s->down_script_arg), "%s", ifname);
1706     }
1707     return s;
1708 }
1709
1710 #endif /* !_WIN32 */
1711
1712 #if defined(CONFIG_VDE)
1713 typedef struct VDEState {
1714     VLANClientState *vc;
1715     VDECONN *vde;
1716 } VDEState;
1717
1718 static void vde_to_qemu(void *opaque)
1719 {
1720     VDEState *s = opaque;
1721     uint8_t buf[4096];
1722     int size;
1723
1724     size = vde_recv(s->vde, (char *)buf, sizeof(buf), 0);
1725     if (size > 0) {
1726         qemu_send_packet(s->vc, buf, size);
1727     }
1728 }
1729
1730 static ssize_t vde_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1731 {
1732     VDEState *s = vc->opaque;
1733     ssize_t ret;
1734
1735     do {
1736       ret = vde_send(s->vde, (const char *)buf, size, 0);
1737     } while (ret < 0 && errno == EINTR);
1738
1739     return ret;
1740 }
1741
1742 static void vde_cleanup(VLANClientState *vc)
1743 {
1744     VDEState *s = vc->opaque;
1745     qemu_set_fd_handler(vde_datafd(s->vde), NULL, NULL, NULL);
1746     vde_close(s->vde);
1747     qemu_free(s);
1748 }
1749
1750 static int net_vde_init(VLANState *vlan, const char *model,
1751                         const char *name, const char *sock,
1752                         int port, const char *group, int mode)
1753 {
1754     VDEState *s;
1755     char *init_group = strlen(group) ? (char *)group : NULL;
1756     char *init_sock = strlen(sock) ? (char *)sock : NULL;
1757
1758     struct vde_open_args args = {
1759         .port = port,
1760         .group = init_group,
1761         .mode = mode,
1762     };
1763
1764     s = qemu_mallocz(sizeof(VDEState));
1765     s->vde = vde_open(init_sock, (char *)"QEMU", &args);
1766     if (!s->vde){
1767         free(s);
1768         return -1;
1769     }
1770     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, vde_receive,
1771                                  NULL, vde_cleanup, s);
1772     qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
1773     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "sock=%s,fd=%d",
1774              sock, vde_datafd(s->vde));
1775     return 0;
1776 }
1777 #endif
1778
1779 /* network connection */
1780 typedef struct NetSocketState {
1781     VLANClientState *vc;
1782     int fd;
1783     int state; /* 0 = getting length, 1 = getting data */
1784     unsigned int index;
1785     unsigned int packet_len;
1786     uint8_t buf[4096];
1787     struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
1788 } NetSocketState;
1789
1790 typedef struct NetSocketListenState {
1791     VLANState *vlan;
1792     char *model;
1793     char *name;
1794     int fd;
1795 } NetSocketListenState;
1796
1797 /* XXX: we consider we can send the whole packet without blocking */
1798 static ssize_t net_socket_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1799 {
1800     NetSocketState *s = vc->opaque;
1801     uint32_t len;
1802     len = htonl(size);
1803
1804     send_all(s->fd, (const uint8_t *)&len, sizeof(len));
1805     return send_all(s->fd, buf, size);
1806 }
1807
1808 static ssize_t net_socket_receive_dgram(VLANClientState *vc, const uint8_t *buf, size_t size)
1809 {
1810     NetSocketState *s = vc->opaque;
1811
1812     return sendto(s->fd, (const void *)buf, size, 0,
1813                   (struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst));
1814 }
1815
1816 static void net_socket_send(void *opaque)
1817 {
1818     NetSocketState *s = opaque;
1819     int size, err;
1820     unsigned l;
1821     uint8_t buf1[4096];
1822     const uint8_t *buf;
1823
1824     size = recv(s->fd, (void *)buf1, sizeof(buf1), 0);
1825     if (size < 0) {
1826         err = socket_error();
1827         if (err != EWOULDBLOCK)
1828             goto eoc;
1829     } else if (size == 0) {
1830         /* end of connection */
1831     eoc:
1832         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1833         closesocket(s->fd);
1834         return;
1835     }
1836     buf = buf1;
1837     while (size > 0) {
1838         /* reassemble a packet from the network */
1839         switch(s->state) {
1840         case 0:
1841             l = 4 - s->index;
1842             if (l > size)
1843                 l = size;
1844             memcpy(s->buf + s->index, buf, l);
1845             buf += l;
1846             size -= l;
1847             s->index += l;
1848             if (s->index == 4) {
1849                 /* got length */
1850                 s->packet_len = ntohl(*(uint32_t *)s->buf);
1851                 s->index = 0;
1852                 s->state = 1;
1853             }
1854             break;
1855         case 1:
1856             l = s->packet_len - s->index;
1857             if (l > size)
1858                 l = size;
1859             if (s->index + l <= sizeof(s->buf)) {
1860                 memcpy(s->buf + s->index, buf, l);
1861             } else {
1862                 fprintf(stderr, "serious error: oversized packet received,"
1863                     "connection terminated.\n");
1864                 s->state = 0;
1865                 goto eoc;
1866             }
1867
1868             s->index += l;
1869             buf += l;
1870             size -= l;
1871             if (s->index >= s->packet_len) {
1872                 qemu_send_packet(s->vc, s->buf, s->packet_len);
1873                 s->index = 0;
1874                 s->state = 0;
1875             }
1876             break;
1877         }
1878     }
1879 }
1880
1881 static void net_socket_send_dgram(void *opaque)
1882 {
1883     NetSocketState *s = opaque;
1884     int size;
1885
1886     size = recv(s->fd, (void *)s->buf, sizeof(s->buf), 0);
1887     if (size < 0)
1888         return;
1889     if (size == 0) {
1890         /* end of connection */
1891         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1892         return;
1893     }
1894     qemu_send_packet(s->vc, s->buf, size);
1895 }
1896
1897 static int net_socket_mcast_create(struct sockaddr_in *mcastaddr)
1898 {
1899     struct ip_mreq imr;
1900     int fd;
1901     int val, ret;
1902     if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
1903         fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n",
1904                 inet_ntoa(mcastaddr->sin_addr),
1905                 (int)ntohl(mcastaddr->sin_addr.s_addr));
1906         return -1;
1907
1908     }
1909     fd = socket(PF_INET, SOCK_DGRAM, 0);
1910     if (fd < 0) {
1911         perror("socket(PF_INET, SOCK_DGRAM)");
1912         return -1;
1913     }
1914
1915     val = 1;
1916     ret=setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
1917                    (const char *)&val, sizeof(val));
1918     if (ret < 0) {
1919         perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
1920         goto fail;
1921     }
1922
1923     ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
1924     if (ret < 0) {
1925         perror("bind");
1926         goto fail;
1927     }
1928
1929     /* Add host to multicast group */
1930     imr.imr_multiaddr = mcastaddr->sin_addr;
1931     imr.imr_interface.s_addr = htonl(INADDR_ANY);
1932
1933     ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1934                      (const char *)&imr, sizeof(struct ip_mreq));
1935     if (ret < 0) {
1936         perror("setsockopt(IP_ADD_MEMBERSHIP)");
1937         goto fail;
1938     }
1939
1940     /* Force mcast msgs to loopback (eg. several QEMUs in same host */
1941     val = 1;
1942     ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1943                    (const char *)&val, sizeof(val));
1944     if (ret < 0) {
1945         perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
1946         goto fail;
1947     }
1948
1949     socket_set_nonblock(fd);
1950     return fd;
1951 fail:
1952     if (fd >= 0)
1953         closesocket(fd);
1954     return -1;
1955 }
1956
1957 static void net_socket_cleanup(VLANClientState *vc)
1958 {
1959     NetSocketState *s = vc->opaque;
1960     qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1961     close(s->fd);
1962     qemu_free(s);
1963 }
1964
1965 static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
1966                                                 const char *model,
1967                                                 const char *name,
1968                                                 int fd, int is_connected)
1969 {
1970     struct sockaddr_in saddr;
1971     int newfd;
1972     socklen_t saddr_len;
1973     NetSocketState *s;
1974
1975     /* fd passed: multicast: "learn" dgram_dst address from bound address and save it
1976      * Because this may be "shared" socket from a "master" process, datagrams would be recv()
1977      * by ONLY ONE process: we must "clone" this dgram socket --jjo
1978      */
1979
1980     if (is_connected) {
1981         if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
1982             /* must be bound */
1983             if (saddr.sin_addr.s_addr==0) {
1984                 fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, cannot setup multicast dst addr\n",
1985                         fd);
1986                 return NULL;
1987             }
1988             /* clone dgram socket */
1989             newfd = net_socket_mcast_create(&saddr);
1990             if (newfd < 0) {
1991                 /* error already reported by net_socket_mcast_create() */
1992                 close(fd);
1993                 return NULL;
1994             }
1995             /* clone newfd to fd, close newfd */
1996             dup2(newfd, fd);
1997             close(newfd);
1998
1999         } else {
2000             fprintf(stderr, "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
2001                     fd, strerror(errno));
2002             return NULL;
2003         }
2004     }
2005
2006     s = qemu_mallocz(sizeof(NetSocketState));
2007     s->fd = fd;
2008
2009     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, net_socket_receive_dgram,
2010                                  NULL, net_socket_cleanup, s);
2011     qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s);
2012
2013     /* mcast: save bound address as dst */
2014     if (is_connected) s->dgram_dst=saddr;
2015
2016     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2017             "socket: fd=%d (%s mcast=%s:%d)",
2018             fd, is_connected? "cloned" : "",
2019             inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2020     return s;
2021 }
2022
2023 static void net_socket_connect(void *opaque)
2024 {
2025     NetSocketState *s = opaque;
2026     qemu_set_fd_handler(s->fd, net_socket_send, NULL, s);
2027 }
2028
2029 static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
2030                                                  const char *model,
2031                                                  const char *name,
2032                                                  int fd, int is_connected)
2033 {
2034     NetSocketState *s;
2035     s = qemu_mallocz(sizeof(NetSocketState));
2036     s->fd = fd;
2037     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, net_socket_receive,
2038                                  NULL, net_socket_cleanup, s);
2039     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2040              "socket: fd=%d", fd);
2041     if (is_connected) {
2042         net_socket_connect(s);
2043     } else {
2044         qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
2045     }
2046     return s;
2047 }
2048
2049 static NetSocketState *net_socket_fd_init(VLANState *vlan,
2050                                           const char *model, const char *name,
2051                                           int fd, int is_connected)
2052 {
2053     int so_type=-1, optlen=sizeof(so_type);
2054
2055     if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type,
2056         (socklen_t *)&optlen)< 0) {
2057         fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n", fd);
2058         return NULL;
2059     }
2060     switch(so_type) {
2061     case SOCK_DGRAM:
2062         return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected);
2063     case SOCK_STREAM:
2064         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
2065     default:
2066         /* who knows ... this could be a eg. a pty, do warn and continue as stream */
2067         fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
2068         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
2069     }
2070     return NULL;
2071 }
2072
2073 static void net_socket_accept(void *opaque)
2074 {
2075     NetSocketListenState *s = opaque;
2076     NetSocketState *s1;
2077     struct sockaddr_in saddr;
2078     socklen_t len;
2079     int fd;
2080
2081     for(;;) {
2082         len = sizeof(saddr);
2083         fd = accept(s->fd, (struct sockaddr *)&saddr, &len);
2084         if (fd < 0 && errno != EINTR) {
2085             return;
2086         } else if (fd >= 0) {
2087             break;
2088         }
2089     }
2090     s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1);
2091     if (!s1) {
2092         closesocket(fd);
2093     } else {
2094         snprintf(s1->vc->info_str, sizeof(s1->vc->info_str),
2095                  "socket: connection from %s:%d",
2096                  inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2097     }
2098 }
2099
2100 static int net_socket_listen_init(VLANState *vlan,
2101                                   const char *model,
2102                                   const char *name,
2103                                   const char *host_str)
2104 {
2105     NetSocketListenState *s;
2106     int fd, val, ret;
2107     struct sockaddr_in saddr;
2108
2109     if (parse_host_port(&saddr, host_str) < 0)
2110         return -1;
2111
2112     s = qemu_mallocz(sizeof(NetSocketListenState));
2113
2114     fd = socket(PF_INET, SOCK_STREAM, 0);
2115     if (fd < 0) {
2116         perror("socket");
2117         return -1;
2118     }
2119     socket_set_nonblock(fd);
2120
2121     /* allow fast reuse */
2122     val = 1;
2123     setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));
2124
2125     ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
2126     if (ret < 0) {
2127         perror("bind");
2128         return -1;
2129     }
2130     ret = listen(fd, 0);
2131     if (ret < 0) {
2132         perror("listen");
2133         return -1;
2134     }
2135     s->vlan = vlan;
2136     s->model = strdup(model);
2137     s->name = name ? strdup(name) : NULL;
2138     s->fd = fd;
2139     qemu_set_fd_handler(fd, net_socket_accept, NULL, s);
2140     return 0;
2141 }
2142
2143 static int net_socket_connect_init(VLANState *vlan,
2144                                    const char *model,
2145                                    const char *name,
2146                                    const char *host_str)
2147 {
2148     NetSocketState *s;
2149     int fd, connected, ret, err;
2150     struct sockaddr_in saddr;
2151
2152     if (parse_host_port(&saddr, host_str) < 0)
2153         return -1;
2154
2155     fd = socket(PF_INET, SOCK_STREAM, 0);
2156     if (fd < 0) {
2157         perror("socket");
2158         return -1;
2159     }
2160     socket_set_nonblock(fd);
2161
2162     connected = 0;
2163     for(;;) {
2164         ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
2165         if (ret < 0) {
2166             err = socket_error();
2167             if (err == EINTR || err == EWOULDBLOCK) {
2168             } else if (err == EINPROGRESS) {
2169                 break;
2170 #ifdef _WIN32
2171             } else if (err == WSAEALREADY) {
2172                 break;
2173 #endif
2174             } else {
2175                 perror("connect");
2176                 closesocket(fd);
2177                 return -1;
2178             }
2179         } else {
2180             connected = 1;
2181             break;
2182         }
2183     }
2184     s = net_socket_fd_init(vlan, model, name, fd, connected);
2185     if (!s)
2186         return -1;
2187     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2188              "socket: connect to %s:%d",
2189              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2190     return 0;
2191 }
2192
2193 static int net_socket_mcast_init(VLANState *vlan,
2194                                  const char *model,
2195                                  const char *name,
2196                                  const char *host_str)
2197 {
2198     NetSocketState *s;
2199     int fd;
2200     struct sockaddr_in saddr;
2201
2202     if (parse_host_port(&saddr, host_str) < 0)
2203         return -1;
2204
2205
2206     fd = net_socket_mcast_create(&saddr);
2207     if (fd < 0)
2208         return -1;
2209
2210     s = net_socket_fd_init(vlan, model, name, fd, 0);
2211     if (!s)
2212         return -1;
2213
2214     s->dgram_dst = saddr;
2215
2216     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2217              "socket: mcast=%s:%d",
2218              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2219     return 0;
2220
2221 }
2222
2223 typedef struct DumpState {
2224     VLANClientState *pcap_vc;
2225     int fd;
2226     int pcap_caplen;
2227 } DumpState;
2228
2229 #define PCAP_MAGIC 0xa1b2c3d4
2230
2231 struct pcap_file_hdr {
2232     uint32_t magic;
2233     uint16_t version_major;
2234     uint16_t version_minor;
2235     int32_t thiszone;
2236     uint32_t sigfigs;
2237     uint32_t snaplen;
2238     uint32_t linktype;
2239 };
2240
2241 struct pcap_sf_pkthdr {
2242     struct {
2243         int32_t tv_sec;
2244         int32_t tv_usec;
2245     } ts;
2246     uint32_t caplen;
2247     uint32_t len;
2248 };
2249
2250 static ssize_t dump_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
2251 {
2252     DumpState *s = vc->opaque;
2253     struct pcap_sf_pkthdr hdr;
2254     int64_t ts;
2255     int caplen;
2256
2257     /* Early return in case of previous error. */
2258     if (s->fd < 0) {
2259         return size;
2260     }
2261
2262     ts = muldiv64(qemu_get_clock(vm_clock), 1000000, ticks_per_sec);
2263     caplen = size > s->pcap_caplen ? s->pcap_caplen : size;
2264
2265     hdr.ts.tv_sec = ts / 1000000;
2266     hdr.ts.tv_usec = ts % 1000000;
2267     hdr.caplen = caplen;
2268     hdr.len = size;
2269     if (write(s->fd, &hdr, sizeof(hdr)) != sizeof(hdr) ||
2270         write(s->fd, buf, caplen) != caplen) {
2271         qemu_log("-net dump write error - stop dump\n");
2272         close(s->fd);
2273         s->fd = -1;
2274     }
2275
2276     return size;
2277 }
2278
2279 static void net_dump_cleanup(VLANClientState *vc)
2280 {
2281     DumpState *s = vc->opaque;
2282
2283     close(s->fd);
2284     qemu_free(s);
2285 }
2286
2287 static int net_dump_init(Monitor *mon, VLANState *vlan, const char *device,
2288                          const char *name, const char *filename, int len)
2289 {
2290     struct pcap_file_hdr hdr;
2291     DumpState *s;
2292
2293     s = qemu_malloc(sizeof(DumpState));
2294
2295     s->fd = open(filename, O_CREAT | O_WRONLY | O_BINARY, 0644);
2296     if (s->fd < 0) {
2297         config_error(mon, "-net dump: can't open %s\n", filename);
2298         return -1;
2299     }
2300
2301     s->pcap_caplen = len;
2302
2303     hdr.magic = PCAP_MAGIC;
2304     hdr.version_major = 2;
2305     hdr.version_minor = 4;
2306     hdr.thiszone = 0;
2307     hdr.sigfigs = 0;
2308     hdr.snaplen = s->pcap_caplen;
2309     hdr.linktype = 1;
2310
2311     if (write(s->fd, &hdr, sizeof(hdr)) < sizeof(hdr)) {
2312         config_error(mon, "-net dump write error: %s\n", strerror(errno));
2313         close(s->fd);
2314         qemu_free(s);
2315         return -1;
2316     }
2317
2318     s->pcap_vc = qemu_new_vlan_client(vlan, device, name, NULL, dump_receive, NULL,
2319                                       net_dump_cleanup, s);
2320     snprintf(s->pcap_vc->info_str, sizeof(s->pcap_vc->info_str),
2321              "dump to %s (len=%d)", filename, len);
2322     return 0;
2323 }
2324
2325 /* find or alloc a new VLAN */
2326 VLANState *qemu_find_vlan(int id, int allocate)
2327 {
2328     VLANState **pvlan, *vlan;
2329     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2330         if (vlan->id == id)
2331             return vlan;
2332     }
2333     if (!allocate) {
2334         return NULL;
2335     }
2336     vlan = qemu_mallocz(sizeof(VLANState));
2337     vlan->id = id;
2338     vlan->next = NULL;
2339     pvlan = &first_vlan;
2340     while (*pvlan != NULL)
2341         pvlan = &(*pvlan)->next;
2342     *pvlan = vlan;
2343     return vlan;
2344 }
2345
2346 static int nic_get_free_idx(void)
2347 {
2348     int index;
2349
2350     for (index = 0; index < MAX_NICS; index++)
2351         if (!nd_table[index].used)
2352             return index;
2353     return -1;
2354 }
2355
2356 void qemu_check_nic_model(NICInfo *nd, const char *model)
2357 {
2358     const char *models[2];
2359
2360     models[0] = model;
2361     models[1] = NULL;
2362
2363     qemu_check_nic_model_list(nd, models, model);
2364 }
2365
2366 void qemu_check_nic_model_list(NICInfo *nd, const char * const *models,
2367                                const char *default_model)
2368 {
2369     int i, exit_status = 0;
2370
2371     if (!nd->model)
2372         nd->model = strdup(default_model);
2373
2374     if (strcmp(nd->model, "?") != 0) {
2375         for (i = 0 ; models[i]; i++)
2376             if (strcmp(nd->model, models[i]) == 0)
2377                 return;
2378
2379         fprintf(stderr, "qemu: Unsupported NIC model: %s\n", nd->model);
2380         exit_status = 1;
2381     }
2382
2383     fprintf(stderr, "qemu: Supported NIC models: ");
2384     for (i = 0 ; models[i]; i++)
2385         fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
2386
2387     exit(exit_status);
2388 }
2389
2390 int net_client_init(Monitor *mon, const char *device, const char *p)
2391 {
2392     char buf[1024];
2393     int vlan_id, ret;
2394     VLANState *vlan;
2395     char *name = NULL;
2396
2397     vlan_id = 0;
2398     if (get_param_value(buf, sizeof(buf), "vlan", p)) {
2399         vlan_id = strtol(buf, NULL, 0);
2400     }
2401     vlan = qemu_find_vlan(vlan_id, 1);
2402
2403     if (get_param_value(buf, sizeof(buf), "name", p)) {
2404         name = qemu_strdup(buf);
2405     }
2406     if (!strcmp(device, "nic")) {
2407         static const char * const nic_params[] = {
2408             "vlan", "name", "macaddr", "model", "addr", "vectors", NULL
2409         };
2410         NICInfo *nd;
2411         uint8_t *macaddr;
2412         int idx = nic_get_free_idx();
2413
2414         if (check_params(buf, sizeof(buf), nic_params, p) < 0) {
2415             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2416             ret = -1;
2417             goto out;
2418         }
2419         if (idx == -1 || nb_nics >= MAX_NICS) {
2420             config_error(mon, "Too Many NICs\n");
2421             ret = -1;
2422             goto out;
2423         }
2424         nd = &nd_table[idx];
2425         macaddr = nd->macaddr;
2426         macaddr[0] = 0x52;
2427         macaddr[1] = 0x54;
2428         macaddr[2] = 0x00;
2429         macaddr[3] = 0x12;
2430         macaddr[4] = 0x34;
2431         macaddr[5] = 0x56 + idx;
2432
2433         if (get_param_value(buf, sizeof(buf), "macaddr", p)) {
2434             if (parse_macaddr(macaddr, buf) < 0) {
2435                 config_error(mon, "invalid syntax for ethernet address\n");
2436                 ret = -1;
2437                 goto out;
2438             }
2439         }
2440         if (get_param_value(buf, sizeof(buf), "model", p)) {
2441             nd->model = strdup(buf);
2442         }
2443         if (get_param_value(buf, sizeof(buf), "addr", p)) {
2444             nd->devaddr = strdup(buf);
2445         }
2446         nd->nvectors = NIC_NVECTORS_UNSPECIFIED;
2447         if (get_param_value(buf, sizeof(buf), "vectors", p)) {
2448             char *endptr;
2449             long vectors = strtol(buf, &endptr, 0);
2450             if (*endptr) {
2451                 config_error(mon, "invalid syntax for # of vectors\n");
2452                 ret = -1;
2453                 goto out;
2454             }
2455             if (vectors < 0 || vectors > 0x7ffffff) {
2456                 config_error(mon, "invalid # of vectors\n");
2457                 ret = -1;
2458                 goto out;
2459             }
2460             nd->nvectors = vectors;
2461         }
2462         nd->vlan = vlan;
2463         nd->name = name;
2464         nd->used = 1;
2465         name = NULL;
2466         nb_nics++;
2467         vlan->nb_guest_devs++;
2468         ret = idx;
2469     } else
2470     if (!strcmp(device, "none")) {
2471         if (*p != '\0') {
2472             config_error(mon, "'none' takes no parameters\n");
2473             ret = -1;
2474             goto out;
2475         }
2476         /* does nothing. It is needed to signal that no network cards
2477            are wanted */
2478         ret = 0;
2479     } else
2480 #ifdef CONFIG_SLIRP
2481     if (!strcmp(device, "user")) {
2482         static const char * const slirp_params[] = {
2483             "vlan", "name", "hostname", "restrict", "ip", "net", "host",
2484             "tftp", "bootfile", "dhcpstart", "dns", "smb", "smbserver",
2485             "hostfwd", "guestfwd", NULL
2486         };
2487         struct slirp_config_str *config;
2488         int restricted = 0;
2489         char *vnet = NULL;
2490         char *vhost = NULL;
2491         char *vhostname = NULL;
2492         char *tftp_export = NULL;
2493         char *bootfile = NULL;
2494         char *vdhcp_start = NULL;
2495         char *vnamesrv = NULL;
2496         char *smb_export = NULL;
2497         char *vsmbsrv = NULL;
2498         const char *q;
2499
2500         if (check_params(buf, sizeof(buf), slirp_params, p) < 0) {
2501             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2502             ret = -1;
2503             goto out;
2504         }
2505         if (get_param_value(buf, sizeof(buf), "ip", p)) {
2506             /* emulate legacy parameter */
2507             vnet = qemu_malloc(strlen(buf) + strlen("/24") + 1);
2508             strcpy(vnet, buf);
2509             strcat(vnet, "/24");
2510         }
2511         if (get_param_value(buf, sizeof(buf), "net", p)) {
2512             vnet = qemu_strdup(buf);
2513         }
2514         if (get_param_value(buf, sizeof(buf), "host", p)) {
2515             vhost = qemu_strdup(buf);
2516         }
2517         if (get_param_value(buf, sizeof(buf), "hostname", p)) {
2518             vhostname = qemu_strdup(buf);
2519         }
2520         if (get_param_value(buf, sizeof(buf), "restrict", p)) {
2521             restricted = (buf[0] == 'y') ? 1 : 0;
2522         }
2523         if (get_param_value(buf, sizeof(buf), "dhcpstart", p)) {
2524             vdhcp_start = qemu_strdup(buf);
2525         }
2526         if (get_param_value(buf, sizeof(buf), "dns", p)) {
2527             vnamesrv = qemu_strdup(buf);
2528         }
2529         if (get_param_value(buf, sizeof(buf), "tftp", p)) {
2530             tftp_export = qemu_strdup(buf);
2531         }
2532         if (get_param_value(buf, sizeof(buf), "bootfile", p)) {
2533             bootfile = qemu_strdup(buf);
2534         }
2535         if (get_param_value(buf, sizeof(buf), "smb", p)) {
2536             smb_export = qemu_strdup(buf);
2537             if (get_param_value(buf, sizeof(buf), "smbserver", p)) {
2538                 vsmbsrv = qemu_strdup(buf);
2539             }
2540         }
2541         q = p;
2542         while (1) {
2543             config = qemu_malloc(sizeof(*config));
2544             if (!get_next_param_value(config->str, sizeof(config->str),
2545                                       "hostfwd", &q)) {
2546                 break;
2547             }
2548             config->flags = SLIRP_CFG_HOSTFWD;
2549             config->next = slirp_configs;
2550             slirp_configs = config;
2551             config = NULL;
2552         }
2553         q = p;
2554         while (1) {
2555             config = qemu_malloc(sizeof(*config));
2556             if (!get_next_param_value(config->str, sizeof(config->str),
2557                                       "guestfwd", &q)) {
2558                 break;
2559             }
2560             config->flags = 0;
2561             config->next = slirp_configs;
2562             slirp_configs = config;
2563             config = NULL;
2564         }
2565         qemu_free(config);
2566         vlan->nb_host_devs++;
2567         ret = net_slirp_init(mon, vlan, device, name, restricted, vnet, vhost,
2568                              vhostname, tftp_export, bootfile, vdhcp_start,
2569                              vnamesrv, smb_export, vsmbsrv);
2570         qemu_free(vnet);
2571         qemu_free(vhost);
2572         qemu_free(vhostname);
2573         qemu_free(tftp_export);
2574         qemu_free(bootfile);
2575         qemu_free(vdhcp_start);
2576         qemu_free(vnamesrv);
2577         qemu_free(smb_export);
2578         qemu_free(vsmbsrv);
2579     } else if (!strcmp(device, "channel")) {
2580         if (TAILQ_EMPTY(&slirp_stacks)) {
2581             struct slirp_config_str *config;
2582
2583             config = qemu_malloc(sizeof(*config));
2584             pstrcpy(config->str, sizeof(config->str), p);
2585             config->flags = SLIRP_CFG_LEGACY;
2586             config->next = slirp_configs;
2587             slirp_configs = config;
2588         } else {
2589             slirp_guestfwd(TAILQ_FIRST(&slirp_stacks), mon, p, 1);
2590         }
2591         ret = 0;
2592     } else
2593 #endif
2594 #ifdef _WIN32
2595     if (!strcmp(device, "tap")) {
2596         static const char * const tap_params[] = {
2597             "vlan", "name", "ifname", NULL
2598         };
2599         char ifname[64];
2600
2601         if (check_params(buf, sizeof(buf), tap_params, p) < 0) {
2602             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2603             ret = -1;
2604             goto out;
2605         }
2606         if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
2607             config_error(mon, "tap: no interface name\n");
2608             ret = -1;
2609             goto out;
2610         }
2611         vlan->nb_host_devs++;
2612         ret = tap_win32_init(vlan, device, name, ifname);
2613     } else
2614 #elif defined (_AIX)
2615 #else
2616     if (!strcmp(device, "tap")) {
2617         char ifname[64], chkbuf[64];
2618         char setup_script[1024], down_script[1024];
2619         TAPState *s;
2620         int fd;
2621         vlan->nb_host_devs++;
2622         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
2623             static const char * const fd_params[] = {
2624                 "vlan", "name", "fd", "sndbuf", NULL
2625             };
2626             if (check_params(chkbuf, sizeof(chkbuf), fd_params, p) < 0) {
2627                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2628                 ret = -1;
2629                 goto out;
2630             }
2631             fd = strtol(buf, NULL, 0);
2632             fcntl(fd, F_SETFL, O_NONBLOCK);
2633             s = net_tap_fd_init(vlan, device, name, fd);
2634         } else {
2635             static const char * const tap_params[] = {
2636                 "vlan", "name", "ifname", "script", "downscript", "sndbuf", NULL
2637             };
2638             if (check_params(chkbuf, sizeof(chkbuf), tap_params, p) < 0) {
2639                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2640                 ret = -1;
2641                 goto out;
2642             }
2643             if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
2644                 ifname[0] = '\0';
2645             }
2646             if (get_param_value(setup_script, sizeof(setup_script), "script", p) == 0) {
2647                 pstrcpy(setup_script, sizeof(setup_script), DEFAULT_NETWORK_SCRIPT);
2648             }
2649             if (get_param_value(down_script, sizeof(down_script), "downscript", p) == 0) {
2650                 pstrcpy(down_script, sizeof(down_script), DEFAULT_NETWORK_DOWN_SCRIPT);
2651             }
2652             s = net_tap_init(vlan, device, name, ifname, setup_script, down_script);
2653         }
2654         if (s != NULL) {
2655             if (get_param_value(buf, sizeof(buf), "sndbuf", p)) {
2656                 tap_set_sndbuf(s, atoi(buf), mon);
2657             }
2658             ret = 0;
2659         } else {
2660             ret = -1;
2661         }
2662     } else
2663 #endif
2664     if (!strcmp(device, "socket")) {
2665         char chkbuf[64];
2666         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
2667             static const char * const fd_params[] = {
2668                 "vlan", "name", "fd", NULL
2669             };
2670             int fd;
2671             if (check_params(chkbuf, sizeof(chkbuf), fd_params, p) < 0) {
2672                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2673                 ret = -1;
2674                 goto out;
2675             }
2676             fd = strtol(buf, NULL, 0);
2677             ret = -1;
2678             if (net_socket_fd_init(vlan, device, name, fd, 1))
2679                 ret = 0;
2680         } else if (get_param_value(buf, sizeof(buf), "listen", p) > 0) {
2681             static const char * const listen_params[] = {
2682                 "vlan", "name", "listen", NULL
2683             };
2684             if (check_params(chkbuf, sizeof(chkbuf), listen_params, p) < 0) {
2685                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2686                 ret = -1;
2687                 goto out;
2688             }
2689             ret = net_socket_listen_init(vlan, device, name, buf);
2690         } else if (get_param_value(buf, sizeof(buf), "connect", p) > 0) {
2691             static const char * const connect_params[] = {
2692                 "vlan", "name", "connect", NULL
2693             };
2694             if (check_params(chkbuf, sizeof(chkbuf), connect_params, p) < 0) {
2695                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2696                 ret = -1;
2697                 goto out;
2698             }
2699             ret = net_socket_connect_init(vlan, device, name, buf);
2700         } else if (get_param_value(buf, sizeof(buf), "mcast", p) > 0) {
2701             static const char * const mcast_params[] = {
2702                 "vlan", "name", "mcast", NULL
2703             };
2704             if (check_params(chkbuf, sizeof(chkbuf), mcast_params, p) < 0) {
2705                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2706                 ret = -1;
2707                 goto out;
2708             }
2709             ret = net_socket_mcast_init(vlan, device, name, buf);
2710         } else {
2711             config_error(mon, "Unknown socket options: %s\n", p);
2712             ret = -1;
2713             goto out;
2714         }
2715         vlan->nb_host_devs++;
2716     } else
2717 #ifdef CONFIG_VDE
2718     if (!strcmp(device, "vde")) {
2719         static const char * const vde_params[] = {
2720             "vlan", "name", "sock", "port", "group", "mode", NULL
2721         };
2722         char vde_sock[1024], vde_group[512];
2723         int vde_port, vde_mode;
2724
2725         if (check_params(buf, sizeof(buf), vde_params, p) < 0) {
2726             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2727             ret = -1;
2728             goto out;
2729         }
2730         vlan->nb_host_devs++;
2731         if (get_param_value(vde_sock, sizeof(vde_sock), "sock", p) <= 0) {
2732             vde_sock[0] = '\0';
2733         }
2734         if (get_param_value(buf, sizeof(buf), "port", p) > 0) {
2735             vde_port = strtol(buf, NULL, 10);
2736         } else {
2737             vde_port = 0;
2738         }
2739         if (get_param_value(vde_group, sizeof(vde_group), "group", p) <= 0) {
2740             vde_group[0] = '\0';
2741         }
2742         if (get_param_value(buf, sizeof(buf), "mode", p) > 0) {
2743             vde_mode = strtol(buf, NULL, 8);
2744         } else {
2745             vde_mode = 0700;
2746         }
2747         ret = net_vde_init(vlan, device, name, vde_sock, vde_port, vde_group, vde_mode);
2748     } else
2749 #endif
2750     if (!strcmp(device, "dump")) {
2751         int len = 65536;
2752
2753         if (get_param_value(buf, sizeof(buf), "len", p) > 0) {
2754             len = strtol(buf, NULL, 0);
2755         }
2756         if (!get_param_value(buf, sizeof(buf), "file", p)) {
2757             snprintf(buf, sizeof(buf), "qemu-vlan%d.pcap", vlan_id);
2758         }
2759         ret = net_dump_init(mon, vlan, device, name, buf, len);
2760     } else {
2761         config_error(mon, "Unknown network device: %s\n", device);
2762         ret = -1;
2763         goto out;
2764     }
2765     if (ret < 0) {
2766         config_error(mon, "Could not initialize device '%s'\n", device);
2767     }
2768 out:
2769     qemu_free(name);
2770     return ret;
2771 }
2772
2773 void net_client_uninit(NICInfo *nd)
2774 {
2775     nd->vlan->nb_guest_devs--;
2776     nb_nics--;
2777     nd->used = 0;
2778     free((void *)nd->model);
2779 }
2780
2781 static int net_host_check_device(const char *device)
2782 {
2783     int i;
2784     const char *valid_param_list[] = { "tap", "socket", "dump"
2785 #ifdef CONFIG_SLIRP
2786                                        ,"user"
2787 #endif
2788 #ifdef CONFIG_VDE
2789                                        ,"vde"
2790 #endif
2791     };
2792     for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) {
2793         if (!strncmp(valid_param_list[i], device,
2794                      strlen(valid_param_list[i])))
2795             return 1;
2796     }
2797
2798     return 0;
2799 }
2800
2801 void net_host_device_add(Monitor *mon, const char *device, const char *opts)
2802 {
2803     if (!net_host_check_device(device)) {
2804         monitor_printf(mon, "invalid host network device %s\n", device);
2805         return;
2806     }
2807     if (net_client_init(mon, device, opts ? opts : "") < 0) {
2808         monitor_printf(mon, "adding host network device %s failed\n", device);
2809     }
2810 }
2811
2812 void net_host_device_remove(Monitor *mon, int vlan_id, const char *device)
2813 {
2814     VLANClientState *vc;
2815
2816     vc = qemu_find_vlan_client_by_name(mon, vlan_id, device);
2817     if (!vc) {
2818         return;
2819     }
2820     if (!net_host_check_device(vc->model)) {
2821         monitor_printf(mon, "invalid host network device %s\n", device);
2822         return;
2823     }
2824     qemu_del_vlan_client(vc);
2825 }
2826
2827 int net_client_parse(const char *str)
2828 {
2829     const char *p;
2830     char *q;
2831     char device[64];
2832
2833     p = str;
2834     q = device;
2835     while (*p != '\0' && *p != ',') {
2836         if ((q - device) < sizeof(device) - 1)
2837             *q++ = *p;
2838         p++;
2839     }
2840     *q = '\0';
2841     if (*p == ',')
2842         p++;
2843
2844     return net_client_init(NULL, device, p);
2845 }
2846
2847 void net_set_boot_mask(int net_boot_mask)
2848 {
2849     int i;
2850
2851     /* Only the first four NICs may be bootable */
2852     net_boot_mask = net_boot_mask & 0xF;
2853
2854     for (i = 0; i < nb_nics; i++) {
2855         if (net_boot_mask & (1 << i)) {
2856             nd_table[i].bootable = 1;
2857             net_boot_mask &= ~(1 << i);
2858         }
2859     }
2860
2861     if (net_boot_mask) {
2862         fprintf(stderr, "Cannot boot from non-existent NIC\n");
2863         exit(1);
2864     }
2865 }
2866
2867 void do_info_network(Monitor *mon)
2868 {
2869     VLANState *vlan;
2870     VLANClientState *vc;
2871
2872     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2873         monitor_printf(mon, "VLAN %d devices:\n", vlan->id);
2874         for(vc = vlan->first_client; vc != NULL; vc = vc->next)
2875             monitor_printf(mon, "  %s: %s\n", vc->name, vc->info_str);
2876     }
2877 }
2878
2879 int do_set_link(Monitor *mon, const char *name, const char *up_or_down)
2880 {
2881     VLANState *vlan;
2882     VLANClientState *vc = NULL;
2883
2884     for (vlan = first_vlan; vlan != NULL; vlan = vlan->next)
2885         for (vc = vlan->first_client; vc != NULL; vc = vc->next)
2886             if (strcmp(vc->name, name) == 0)
2887                 goto done;
2888 done:
2889
2890     if (!vc) {
2891         monitor_printf(mon, "could not find network device '%s'", name);
2892         return 0;
2893     }
2894
2895     if (strcmp(up_or_down, "up") == 0)
2896         vc->link_down = 0;
2897     else if (strcmp(up_or_down, "down") == 0)
2898         vc->link_down = 1;
2899     else
2900         monitor_printf(mon, "invalid link status '%s'; only 'up' or 'down' "
2901                        "valid\n", up_or_down);
2902
2903     if (vc->link_status_changed)
2904         vc->link_status_changed(vc);
2905
2906     return 1;
2907 }
2908
2909 void net_cleanup(void)
2910 {
2911     VLANState *vlan;
2912
2913     /* close network clients */
2914     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2915         VLANClientState *vc = vlan->first_client;
2916
2917         while (vc) {
2918             VLANClientState *next = vc->next;
2919
2920             qemu_del_vlan_client(vc);
2921
2922             vc = next;
2923         }
2924     }
2925 }
2926
2927 void net_client_check(void)
2928 {
2929     VLANState *vlan;
2930
2931     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2932         if (vlan->nb_guest_devs == 0 && vlan->nb_host_devs == 0)
2933             continue;
2934         if (vlan->nb_guest_devs == 0)
2935             fprintf(stderr, "Warning: vlan %d with no nics\n", vlan->id);
2936         if (vlan->nb_host_devs == 0)
2937             fprintf(stderr,
2938                     "Warning: vlan %d is not connected to host network\n",
2939                     vlan->id);
2940     }
2941 }