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(0x0a000200) }; /* 10.0.2.0 */
 786     struct in_addr mask = { .s_addr = htonl(0xffffff00) }; /* 255.255.255.0 */
 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     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
 907              "net=%s, restricted=%c", inet_ntoa(net), restricted ? 'y' : 'n');
 908     return 0;
 909 }
 910
 911 static SlirpState *slirp_lookup(Monitor *mon, const char *vlan,
 912                                 const char *stack)
 913 {
 914     VLANClientState *vc;
 915
 916     if (vlan) {
 917         vc = qemu_find_vlan_client_by_name(mon, strtol(vlan, NULL, 0), stack);
 918         if (!vc) {
 919             return NULL;
 920         }
 921         if (strcmp(vc->model, "user")) {
 922             monitor_printf(mon, "invalid device specified\n");
 923             return NULL;
 924         }
 925         return vc->opaque;
 926     } else {
 927         if (TAILQ_EMPTY(&slirp_stacks)) {
 928             monitor_printf(mon, "user mode network stack not in use\n");
 929             return NULL;
 930         }
 931         return TAILQ_FIRST(&slirp_stacks);
 932     }
 933 }
 934
 935 void net_slirp_hostfwd_remove(Monitor *mon, const char *arg1,
 936                               const char *arg2, const char *arg3)
 937 {
 938     struct in_addr host_addr = { .s_addr = INADDR_ANY };
 939     int host_port;
 940     char buf[256] = "";
 941     const char *src_str, *p;
 942     SlirpState *s;
 943     int is_udp = 0;
 944     int err;
 945
 946     if (arg2) {
 947         s = slirp_lookup(mon, arg1, arg2);
 948         src_str = arg3;
 949     } else {
 950         s = slirp_lookup(mon, NULL, NULL);
 951         src_str = arg1;
 952     }
 953     if (!s) {
 954         return;
 955     }
 956
 957     if (!src_str || !src_str[0])
 958         goto fail_syntax;
 959
 960     p = src_str;
 961     get_str_sep(buf, sizeof(buf), &p, ':');
 962
 963     if (!strcmp(buf, "tcp") || buf[0] == '\0') {
 964         is_udp = 0;
 965     } else if (!strcmp(buf, "udp")) {
 966         is_udp = 1;
 967     } else {
 968         goto fail_syntax;
 969     }
 970
 971     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 972         goto fail_syntax;
 973     }
 974     if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
 975         goto fail_syntax;
 976     }
 977
 978     host_port = atoi(p);
 979
 980     err = slirp_remove_hostfwd(TAILQ_FIRST(&slirp_stacks)->slirp, is_udp,
 981                                host_addr, host_port);
 982
 983     monitor_printf(mon, "host forwarding rule for %s %s\n", src_str,
 984                    err ? "removed" : "not found");
 985     return;
 986
 987  fail_syntax:
 988     monitor_printf(mon, "invalid format\n");
 989 }
 990
 991 static void slirp_hostfwd(SlirpState *s, Monitor *mon, const char *redir_str,
 992                           int legacy_format)
 993 {
 994     struct in_addr host_addr = { .s_addr = INADDR_ANY };
 995     struct in_addr guest_addr = { .s_addr = 0 };
 996     int host_port, guest_port;
 997     const char *p;
 998     char buf[256];
 999     int is_udp;
1000     char *end;
1001
1002     p = redir_str;
1003     if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1004         goto fail_syntax;
1005     }
1006     if (!strcmp(buf, "tcp") || buf[0] == '\0') {
1007         is_udp = 0;
1008     } else if (!strcmp(buf, "udp")) {
1009         is_udp = 1;
1010     } else {
1011         goto fail_syntax;
1012     }
1013
1014     if (!legacy_format) {
1015         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1016             goto fail_syntax;
1017         }
1018         if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
1019             goto fail_syntax;
1020         }
1021     }
1022
1023     if (get_str_sep(buf, sizeof(buf), &p, legacy_format ? ':' : '-') < 0) {
1024         goto fail_syntax;
1025     }
1026     host_port = strtol(buf, &end, 0);
1027     if (*end != '\0' || host_port < 1 || host_port > 65535) {
1028         goto fail_syntax;
1029     }
1030
1031     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1032         goto fail_syntax;
1033     }
1034     if (buf[0] != '\0' && !inet_aton(buf, &guest_addr)) {
1035         goto fail_syntax;
1036     }
1037
1038     guest_port = strtol(p, &end, 0);
1039     if (*end != '\0' || guest_port < 1 || guest_port > 65535) {
1040         goto fail_syntax;
1041     }
1042
1043     if (slirp_add_hostfwd(s->slirp, is_udp, host_addr, host_port, guest_addr,
1044                           guest_port) < 0) {
1045         config_error(mon, "could not set up host forwarding rule '%s'\n",
1046                      redir_str);
1047     }
1048     return;
1049
1050  fail_syntax:
1051     config_error(mon, "invalid host forwarding rule '%s'\n", redir_str);
1052 }
1053
1054 void net_slirp_hostfwd_add(Monitor *mon, const char *arg1,
1055                            const char *arg2, const char *arg3)
1056 {
1057     const char *redir_str;
1058     SlirpState *s;
1059
1060     if (arg2) {
1061         s = slirp_lookup(mon, arg1, arg2);
1062         redir_str = arg3;
1063     } else {
1064         s = slirp_lookup(mon, NULL, NULL);
1065         redir_str = arg1;
1066     }
1067     if (s) {
1068         slirp_hostfwd(s, mon, redir_str, 0);
1069     }
1070
1071 }
1072
1073 void net_slirp_redir(const char *redir_str)
1074 {
1075     struct slirp_config_str *config;
1076
1077     if (TAILQ_EMPTY(&slirp_stacks)) {
1078         config = qemu_malloc(sizeof(*config));
1079         pstrcpy(config->str, sizeof(config->str), redir_str);
1080         config->flags = SLIRP_CFG_HOSTFWD | SLIRP_CFG_LEGACY;
1081         config->next = slirp_configs;
1082         slirp_configs = config;
1083         return;
1084     }
1085
1086     slirp_hostfwd(TAILQ_FIRST(&slirp_stacks), NULL, redir_str, 1);
1087 }
1088
1089 #ifndef _WIN32
1090
1091 /* automatic user mode samba server configuration */
1092 static void slirp_smb_cleanup(SlirpState *s)
1093 {
1094     char cmd[128];
1095
1096     if (s->smb_dir[0] != '\0') {
1097         snprintf(cmd, sizeof(cmd), "rm -rf %s", s->smb_dir);
1098         system(cmd);
1099         s->smb_dir[0] = '\0';
1100     }
1101 }
1102
1103 static void slirp_smb(SlirpState* s, Monitor *mon, const char *exported_dir,
1104                       struct in_addr vserver_addr)
1105 {
1106     static int instance;
1107     char smb_conf[128];
1108     char smb_cmdline[128];
1109     FILE *f;
1110
1111     snprintf(s->smb_dir, sizeof(s->smb_dir), "/tmp/qemu-smb.%ld-%d",
1112              (long)getpid(), instance++);
1113     if (mkdir(s->smb_dir, 0700) < 0) {
1114         config_error(mon, "could not create samba server dir '%s'\n",
1115                      s->smb_dir);
1116         return;
1117     }
1118     snprintf(smb_conf, sizeof(smb_conf), "%s/%s", s->smb_dir, "smb.conf");
1119
1120     f = fopen(smb_conf, "w");
1121     if (!f) {
1122         slirp_smb_cleanup(s);
1123         config_error(mon, "could not create samba server "
1124                      "configuration file '%s'\n", smb_conf);
1125         return;
1126     }
1127     fprintf(f,
1128             "[global]\n"
1129             "private dir=%s\n"
1130             "smb ports=0\n"
1131             "socket address=127.0.0.1\n"
1132             "pid directory=%s\n"
1133             "lock directory=%s\n"
1134             "log file=%s/log.smbd\n"
1135             "smb passwd file=%s/smbpasswd\n"
1136             "security = share\n"
1137             "[qemu]\n"
1138             "path=%s\n"
1139             "read only=no\n"
1140             "guest ok=yes\n",
1141             s->smb_dir,
1142             s->smb_dir,
1143             s->smb_dir,
1144             s->smb_dir,
1145             s->smb_dir,
1146             exported_dir
1147             );
1148     fclose(f);
1149
1150     snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -s %s",
1151              SMBD_COMMAND, smb_conf);
1152
1153     if (slirp_add_exec(s->slirp, 0, smb_cmdline, vserver_addr, 139) < 0) {
1154         slirp_smb_cleanup(s);
1155         config_error(mon, "conflicting/invalid smbserver address\n");
1156     }
1157 }
1158
1159 /* automatic user mode samba server configuration (legacy interface) */
1160 void net_slirp_smb(const char *exported_dir)
1161 {
1162     struct in_addr vserver_addr = { .s_addr = 0 };
1163
1164     if (legacy_smb_export) {
1165         fprintf(stderr, "-smb given twice\n");
1166         exit(1);
1167     }
1168     legacy_smb_export = exported_dir;
1169     if (!TAILQ_EMPTY(&slirp_stacks)) {
1170         slirp_smb(TAILQ_FIRST(&slirp_stacks), NULL, exported_dir,
1171                   vserver_addr);
1172     }
1173 }
1174
1175 #endif /* !defined(_WIN32) */
1176
1177 struct GuestFwd {
1178     CharDriverState *hd;
1179     struct in_addr server;
1180     int port;
1181     Slirp *slirp;
1182 };
1183
1184 static int guestfwd_can_read(void *opaque)
1185 {
1186     struct GuestFwd *fwd = opaque;
1187     return slirp_socket_can_recv(fwd->slirp, fwd->server, fwd->port);
1188 }
1189
1190 static void guestfwd_read(void *opaque, const uint8_t *buf, int size)
1191 {
1192     struct GuestFwd *fwd = opaque;
1193     slirp_socket_recv(fwd->slirp, fwd->server, fwd->port, buf, size);
1194 }
1195
1196 static void slirp_guestfwd(SlirpState *s, Monitor *mon, const char *config_str,
1197                            int legacy_format)
1198 {
1199     struct in_addr server = { .s_addr = 0 };
1200     struct GuestFwd *fwd;
1201     const char *p;
1202     char buf[128];
1203     char *end;
1204     int port;
1205
1206     p = config_str;
1207     if (legacy_format) {
1208         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1209             goto fail_syntax;
1210         }
1211     } else {
1212         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1213             goto fail_syntax;
1214         }
1215         if (strcmp(buf, "tcp") && buf[0] != '\0') {
1216             goto fail_syntax;
1217         }
1218         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1219             goto fail_syntax;
1220         }
1221         if (buf[0] != '\0' && !inet_aton(buf, &server)) {
1222             goto fail_syntax;
1223         }
1224         if (get_str_sep(buf, sizeof(buf), &p, '-') < 0) {
1225             goto fail_syntax;
1226         }
1227     }
1228     port = strtol(buf, &end, 10);
1229     if (*end != '\0' || port < 1 || port > 65535) {
1230         goto fail_syntax;
1231     }
1232
1233     fwd = qemu_malloc(sizeof(struct GuestFwd));
1234     snprintf(buf, sizeof(buf), "guestfwd.tcp:%d", port);
1235     fwd->hd = qemu_chr_open(buf, p, NULL);
1236     if (!fwd->hd) {
1237         config_error(mon, "could not open guest forwarding device '%s'\n",
1238                      buf);
1239         qemu_free(fwd);
1240         return;
1241     }
1242     fwd->server = server;
1243     fwd->port = port;
1244     fwd->slirp = s->slirp;
1245
1246     if (slirp_add_exec(s->slirp, 3, fwd->hd, server, port) < 0) {
1247         config_error(mon, "conflicting/invalid host:port in guest forwarding "
1248                      "rule '%s'\n", config_str);
1249         qemu_free(fwd);
1250         return;
1251     }
1252     qemu_chr_add_handlers(fwd->hd, guestfwd_can_read, guestfwd_read,
1253                           NULL, fwd);
1254     return;
1255
1256  fail_syntax:
1257     config_error(mon, "invalid guest forwarding rule '%s'\n", config_str);
1258 }
1259
1260 void do_info_usernet(Monitor *mon)
1261 {
1262     SlirpState *s;
1263
1264     TAILQ_FOREACH(s, &slirp_stacks, entry) {
1265         monitor_printf(mon, "VLAN %d (%s):\n", s->vc->vlan->id, s->vc->name);
1266         slirp_connection_info(s->slirp, mon);
1267     }
1268 }
1269
1270 #endif /* CONFIG_SLIRP */
1271
1272 #if !defined(_WIN32)
1273
1274 typedef struct TAPState {
1275     VLANClientState *vc;
1276     int fd;
1277     char down_script[1024];
1278     char down_script_arg[128];
1279     uint8_t buf[4096];
1280     unsigned int read_poll : 1;
1281     unsigned int write_poll : 1;
1282 } TAPState;
1283
1284 static int launch_script(const char *setup_script, const char *ifname, int fd);
1285
1286 static int tap_can_send(void *opaque);
1287 static void tap_send(void *opaque);
1288 static void tap_writable(void *opaque);
1289
1290 static void tap_update_fd_handler(TAPState *s)
1291 {
1292     qemu_set_fd_handler2(s->fd,
1293                          s->read_poll  ? tap_can_send : NULL,
1294                          s->read_poll  ? tap_send     : NULL,
1295                          s->write_poll ? tap_writable : NULL,
1296                          s);
1297 }
1298
1299 static void tap_read_poll(TAPState *s, int enable)
1300 {
1301     s->read_poll = !!enable;
1302     tap_update_fd_handler(s);
1303 }
1304
1305 static void tap_write_poll(TAPState *s, int enable)
1306 {
1307     s->write_poll = !!enable;
1308     tap_update_fd_handler(s);
1309 }
1310
1311 static void tap_writable(void *opaque)
1312 {
1313     TAPState *s = opaque;
1314
1315     tap_write_poll(s, 0);
1316
1317     qemu_flush_queued_packets(s->vc);
1318 }
1319
1320 static ssize_t tap_receive_iov(VLANClientState *vc, const struct iovec *iov,
1321                                int iovcnt)
1322 {
1323     TAPState *s = vc->opaque;
1324     ssize_t len;
1325
1326     do {
1327         len = writev(s->fd, iov, iovcnt);
1328     } while (len == -1 && errno == EINTR);
1329
1330     if (len == -1 && errno == EAGAIN) {
1331         tap_write_poll(s, 1);
1332         return 0;
1333     }
1334
1335     return len;
1336 }
1337
1338 static ssize_t tap_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1339 {
1340     TAPState *s = vc->opaque;
1341     ssize_t len;
1342
1343     do {
1344         len = write(s->fd, buf, size);
1345     } while (len == -1 && (errno == EINTR || errno == EAGAIN));
1346
1347     return len;
1348 }
1349
1350 static int tap_can_send(void *opaque)
1351 {
1352     TAPState *s = opaque;
1353
1354     return qemu_can_send_packet(s->vc);
1355 }
1356
1357 #ifdef __sun__
1358 static ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
1359 {
1360     struct strbuf sbuf;
1361     int f = 0;
1362
1363     sbuf.maxlen = maxlen;
1364     sbuf.buf = (char *)buf;
1365
1366     return getmsg(tapfd, NULL, &sbuf, &f) >= 0 ? sbuf.len : -1;
1367 }
1368 #else
1369 static ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
1370 {
1371     return read(tapfd, buf, maxlen);
1372 }
1373 #endif
1374
1375 static void tap_send_completed(VLANClientState *vc, ssize_t len)
1376 {
1377     TAPState *s = vc->opaque;
1378     tap_read_poll(s, 1);
1379 }
1380
1381 static void tap_send(void *opaque)
1382 {
1383     TAPState *s = opaque;
1384     int size;
1385
1386     do {
1387         size = tap_read_packet(s->fd, s->buf, sizeof(s->buf));
1388         if (size <= 0) {
1389             break;
1390         }
1391
1392         size = qemu_send_packet_async(s->vc, s->buf, size, tap_send_completed);
1393         if (size == 0) {
1394             tap_read_poll(s, 0);
1395         }
1396     } while (size > 0);
1397 }
1398
1399 #ifdef TUNSETSNDBUF
1400 /* sndbuf should be set to a value lower than the tx queue
1401  * capacity of any destination network interface.
1402  * Ethernet NICs generally have txqueuelen=1000, so 1Mb is
1403  * a good default, given a 1500 byte MTU.
1404  */
1405 #define TAP_DEFAULT_SNDBUF 1024*1024
1406
1407 static void tap_set_sndbuf(TAPState *s, const char *sndbuf_str, Monitor *mon)
1408 {
1409     int sndbuf = TAP_DEFAULT_SNDBUF;
1410
1411     if (sndbuf_str) {
1412         sndbuf = atoi(sndbuf_str);
1413     }
1414
1415     if (!sndbuf) {
1416         sndbuf = INT_MAX;
1417     }
1418
1419     if (ioctl(s->fd, TUNSETSNDBUF, &sndbuf) == -1 && sndbuf_str) {
1420         config_error(mon, "TUNSETSNDBUF ioctl failed: %s\n",
1421                      strerror(errno));
1422     }
1423 }
1424 #else
1425 static void tap_set_sndbuf(TAPState *s, const char *sndbuf_str, Monitor *mon)
1426 {
1427     if (sndbuf_str) {
1428         config_error(mon, "No '-net tap,sndbuf=<nbytes>' support available\n");
1429     }
1430 }
1431 #endif /* TUNSETSNDBUF */
1432
1433 static void tap_cleanup(VLANClientState *vc)
1434 {
1435     TAPState *s = vc->opaque;
1436
1437     qemu_purge_queued_packets(vc);
1438
1439     if (s->down_script[0])
1440         launch_script(s->down_script, s->down_script_arg, s->fd);
1441
1442     tap_read_poll(s, 0);
1443     tap_write_poll(s, 0);
1444     close(s->fd);
1445     qemu_free(s);
1446 }
1447
1448 /* fd support */
1449
1450 static TAPState *net_tap_fd_init(VLANState *vlan,
1451                                  const char *model,
1452                                  const char *name,
1453                                  int fd)
1454 {
1455     TAPState *s;
1456
1457     s = qemu_mallocz(sizeof(TAPState));
1458     s->fd = fd;
1459     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, tap_receive,
1460                                  tap_receive_iov, tap_cleanup, s);
1461     tap_read_poll(s, 1);
1462     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "fd=%d", fd);
1463     return s;
1464 }
1465
1466 #if defined (HOST_BSD) || defined (__FreeBSD_kernel__)
1467 static int tap_open(char *ifname, int ifname_size)
1468 {
1469     int fd;
1470     char *dev;
1471     struct stat s;
1472
1473     TFR(fd = open("/dev/tap", O_RDWR));
1474     if (fd < 0) {
1475         fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n");
1476         return -1;
1477     }
1478
1479     fstat(fd, &s);
1480     dev = devname(s.st_rdev, S_IFCHR);
1481     pstrcpy(ifname, ifname_size, dev);
1482
1483     fcntl(fd, F_SETFL, O_NONBLOCK);
1484     return fd;
1485 }
1486 #elif defined(__sun__)
1487 #define TUNNEWPPA       (('T'<<16) | 0x0001)
1488 /*
1489  * Allocate TAP device, returns opened fd.
1490  * Stores dev name in the first arg(must be large enough).
1491  */
1492 static int tap_alloc(char *dev, size_t dev_size)
1493 {
1494     int tap_fd, if_fd, ppa = -1;
1495     static int ip_fd = 0;
1496     char *ptr;
1497
1498     static int arp_fd = 0;
1499     int ip_muxid, arp_muxid;
1500     struct strioctl  strioc_if, strioc_ppa;
1501     int link_type = I_PLINK;;
1502     struct lifreq ifr;
1503     char actual_name[32] = "";
1504
1505     memset(&ifr, 0x0, sizeof(ifr));
1506
1507     if( *dev ){
1508        ptr = dev;
1509        while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
1510        ppa = atoi(ptr);
1511     }
1512
1513     /* Check if IP device was opened */
1514     if( ip_fd )
1515        close(ip_fd);
1516
1517     TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
1518     if (ip_fd < 0) {
1519        syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)");
1520        return -1;
1521     }
1522
1523     TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
1524     if (tap_fd < 0) {
1525        syslog(LOG_ERR, "Can't open /dev/tap");
1526        return -1;
1527     }
1528
1529     /* Assign a new PPA and get its unit number. */
1530     strioc_ppa.ic_cmd = TUNNEWPPA;
1531     strioc_ppa.ic_timout = 0;
1532     strioc_ppa.ic_len = sizeof(ppa);
1533     strioc_ppa.ic_dp = (char *)&ppa;
1534     if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
1535        syslog (LOG_ERR, "Can't assign new interface");
1536
1537     TFR(if_fd = open("/dev/tap", O_RDWR, 0));
1538     if (if_fd < 0) {
1539        syslog(LOG_ERR, "Can't open /dev/tap (2)");
1540        return -1;
1541     }
1542     if(ioctl(if_fd, I_PUSH, "ip") < 0){
1543        syslog(LOG_ERR, "Can't push IP module");
1544        return -1;
1545     }
1546
1547     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
1548         syslog(LOG_ERR, "Can't get flags\n");
1549
1550     snprintf (actual_name, 32, "tap%d", ppa);
1551     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
1552
1553     ifr.lifr_ppa = ppa;
1554     /* Assign ppa according to the unit number returned by tun device */
1555
1556     if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
1557         syslog (LOG_ERR, "Can't set PPA %d", ppa);
1558     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
1559         syslog (LOG_ERR, "Can't get flags\n");
1560     /* Push arp module to if_fd */
1561     if (ioctl (if_fd, I_PUSH, "arp") < 0)
1562         syslog (LOG_ERR, "Can't push ARP module (2)");
1563
1564     /* Push arp module to ip_fd */
1565     if (ioctl (ip_fd, I_POP, NULL) < 0)
1566         syslog (LOG_ERR, "I_POP failed\n");
1567     if (ioctl (ip_fd, I_PUSH, "arp") < 0)
1568         syslog (LOG_ERR, "Can't push ARP module (3)\n");
1569     /* Open arp_fd */
1570     TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
1571     if (arp_fd < 0)
1572        syslog (LOG_ERR, "Can't open %s\n", "/dev/tap");
1573
1574     /* Set ifname to arp */
1575     strioc_if.ic_cmd = SIOCSLIFNAME;
1576     strioc_if.ic_timout = 0;
1577     strioc_if.ic_len = sizeof(ifr);
1578     strioc_if.ic_dp = (char *)&ifr;
1579     if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
1580         syslog (LOG_ERR, "Can't set ifname to arp\n");
1581     }
1582
1583     if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
1584        syslog(LOG_ERR, "Can't link TAP device to IP");
1585        return -1;
1586     }
1587
1588     if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
1589         syslog (LOG_ERR, "Can't link TAP device to ARP");
1590
1591     close (if_fd);
1592
1593     memset(&ifr, 0x0, sizeof(ifr));
1594     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
1595     ifr.lifr_ip_muxid  = ip_muxid;
1596     ifr.lifr_arp_muxid = arp_muxid;
1597
1598     if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
1599     {
1600       ioctl (ip_fd, I_PUNLINK , arp_muxid);
1601       ioctl (ip_fd, I_PUNLINK, ip_muxid);
1602       syslog (LOG_ERR, "Can't set multiplexor id");
1603     }
1604
1605     snprintf(dev, dev_size, "tap%d", ppa);
1606     return tap_fd;
1607 }
1608
1609 static int tap_open(char *ifname, int ifname_size)
1610 {
1611     char  dev[10]="";
1612     int fd;
1613     if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){
1614        fprintf(stderr, "Cannot allocate TAP device\n");
1615        return -1;
1616     }
1617     pstrcpy(ifname, ifname_size, dev);
1618     fcntl(fd, F_SETFL, O_NONBLOCK);
1619     return fd;
1620 }
1621 #elif defined (_AIX)
1622 static int tap_open(char *ifname, int ifname_size)
1623 {
1624     fprintf (stderr, "no tap on AIX\n");
1625     return -1;
1626 }
1627 #else
1628 static int tap_open(char *ifname, int ifname_size)
1629 {
1630     struct ifreq ifr;
1631     int fd, ret;
1632
1633     TFR(fd = open("/dev/net/tun", O_RDWR));
1634     if (fd < 0) {
1635         fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n");
1636         return -1;
1637     }
1638     memset(&ifr, 0, sizeof(ifr));
1639     ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
1640     if (ifname[0] != '\0')
1641         pstrcpy(ifr.ifr_name, IFNAMSIZ, ifname);
1642     else
1643         pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d");
1644     ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
1645     if (ret != 0) {
1646         fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n");
1647         close(fd);
1648         return -1;
1649     }
1650     pstrcpy(ifname, ifname_size, ifr.ifr_name);
1651     fcntl(fd, F_SETFL, O_NONBLOCK);
1652     return fd;
1653 }
1654 #endif
1655
1656 static int launch_script(const char *setup_script, const char *ifname, int fd)
1657 {
1658     sigset_t oldmask, mask;
1659     int pid, status;
1660     char *args[3];
1661     char **parg;
1662
1663     sigemptyset(&mask);
1664     sigaddset(&mask, SIGCHLD);
1665     sigprocmask(SIG_BLOCK, &mask, &oldmask);
1666
1667     /* try to launch network script */
1668     pid = fork();
1669     if (pid == 0) {
1670         int open_max = sysconf(_SC_OPEN_MAX), i;
1671
1672         for (i = 0; i < open_max; i++) {
1673             if (i != STDIN_FILENO &&
1674                 i != STDOUT_FILENO &&
1675                 i != STDERR_FILENO &&
1676                 i != fd) {
1677                 close(i);
1678             }
1679         }
1680         parg = args;
1681         *parg++ = (char *)setup_script;
1682         *parg++ = (char *)ifname;
1683         *parg++ = NULL;
1684         execv(setup_script, args);
1685         _exit(1);
1686     } else if (pid > 0) {
1687         while (waitpid(pid, &status, 0) != pid) {
1688             /* loop */
1689         }
1690         sigprocmask(SIG_SETMASK, &oldmask, NULL);
1691
1692         if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
1693             return 0;
1694         }
1695     }
1696     fprintf(stderr, "%s: could not launch network script\n", setup_script);
1697     return -1;
1698 }
1699
1700 static TAPState *net_tap_init(VLANState *vlan, const char *model,
1701                               const char *name, const char *ifname1,
1702                               const char *setup_script, const char *down_script)
1703 {
1704     TAPState *s;
1705     int fd;
1706     char ifname[128];
1707
1708     if (ifname1 != NULL)
1709         pstrcpy(ifname, sizeof(ifname), ifname1);
1710     else
1711         ifname[0] = '\0';
1712     TFR(fd = tap_open(ifname, sizeof(ifname)));
1713     if (fd < 0)
1714         return NULL;
1715
1716     if (!setup_script || !strcmp(setup_script, "no"))
1717         setup_script = "";
1718     if (setup_script[0] != '\0' &&
1719         launch_script(setup_script, ifname, fd)) {
1720         return NULL;
1721     }
1722     s = net_tap_fd_init(vlan, model, name, fd);
1723     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1724              "ifname=%s,script=%s,downscript=%s",
1725              ifname, setup_script, down_script);
1726     if (down_script && strcmp(down_script, "no")) {
1727         snprintf(s->down_script, sizeof(s->down_script), "%s", down_script);
1728         snprintf(s->down_script_arg, sizeof(s->down_script_arg), "%s", ifname);
1729     }
1730     return s;
1731 }
1732
1733 #endif /* !_WIN32 */
1734
1735 #if defined(CONFIG_VDE)
1736 typedef struct VDEState {
1737     VLANClientState *vc;
1738     VDECONN *vde;
1739 } VDEState;
1740
1741 static void vde_to_qemu(void *opaque)
1742 {
1743     VDEState *s = opaque;
1744     uint8_t buf[4096];
1745     int size;
1746
1747     size = vde_recv(s->vde, (char *)buf, sizeof(buf), 0);
1748     if (size > 0) {
1749         qemu_send_packet(s->vc, buf, size);
1750     }
1751 }
1752
1753 static ssize_t vde_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1754 {
1755     VDEState *s = vc->opaque;
1756     ssize_t ret;
1757
1758     do {
1759       ret = vde_send(s->vde, (const char *)buf, size, 0);
1760     } while (ret < 0 && errno == EINTR);
1761
1762     return ret;
1763 }
1764
1765 static void vde_cleanup(VLANClientState *vc)
1766 {
1767     VDEState *s = vc->opaque;
1768     qemu_set_fd_handler(vde_datafd(s->vde), NULL, NULL, NULL);
1769     vde_close(s->vde);
1770     qemu_free(s);
1771 }
1772
1773 static int net_vde_init(VLANState *vlan, const char *model,
1774                         const char *name, const char *sock,
1775                         int port, const char *group, int mode)
1776 {
1777     VDEState *s;
1778     char *init_group = strlen(group) ? (char *)group : NULL;
1779     char *init_sock = strlen(sock) ? (char *)sock : NULL;
1780
1781     struct vde_open_args args = {
1782         .port = port,
1783         .group = init_group,
1784         .mode = mode,
1785     };
1786
1787     s = qemu_mallocz(sizeof(VDEState));
1788     s->vde = vde_open(init_sock, (char *)"QEMU", &args);
1789     if (!s->vde){
1790         free(s);
1791         return -1;
1792     }
1793     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, vde_receive,
1794                                  NULL, vde_cleanup, s);
1795     qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
1796     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "sock=%s,fd=%d",
1797              sock, vde_datafd(s->vde));
1798     return 0;
1799 }
1800 #endif
1801
1802 /* network connection */
1803 typedef struct NetSocketState {
1804     VLANClientState *vc;
1805     int fd;
1806     int state; /* 0 = getting length, 1 = getting data */
1807     unsigned int index;
1808     unsigned int packet_len;
1809     uint8_t buf[4096];
1810     struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
1811 } NetSocketState;
1812
1813 typedef struct NetSocketListenState {
1814     VLANState *vlan;
1815     char *model;
1816     char *name;
1817     int fd;
1818 } NetSocketListenState;
1819
1820 /* XXX: we consider we can send the whole packet without blocking */
1821 static ssize_t net_socket_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1822 {
1823     NetSocketState *s = vc->opaque;
1824     uint32_t len;
1825     len = htonl(size);
1826
1827     send_all(s->fd, (const uint8_t *)&len, sizeof(len));
1828     return send_all(s->fd, buf, size);
1829 }
1830
1831 static ssize_t net_socket_receive_dgram(VLANClientState *vc, const uint8_t *buf, size_t size)
1832 {
1833     NetSocketState *s = vc->opaque;
1834
1835     return sendto(s->fd, (const void *)buf, size, 0,
1836                   (struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst));
1837 }
1838
1839 static void net_socket_send(void *opaque)
1840 {
1841     NetSocketState *s = opaque;
1842     int size, err;
1843     unsigned l;
1844     uint8_t buf1[4096];
1845     const uint8_t *buf;
1846
1847     size = recv(s->fd, (void *)buf1, sizeof(buf1), 0);
1848     if (size < 0) {
1849         err = socket_error();
1850         if (err != EWOULDBLOCK)
1851             goto eoc;
1852     } else if (size == 0) {
1853         /* end of connection */
1854     eoc:
1855         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1856         closesocket(s->fd);
1857         return;
1858     }
1859     buf = buf1;
1860     while (size > 0) {
1861         /* reassemble a packet from the network */
1862         switch(s->state) {
1863         case 0:
1864             l = 4 - s->index;
1865             if (l > size)
1866                 l = size;
1867             memcpy(s->buf + s->index, buf, l);
1868             buf += l;
1869             size -= l;
1870             s->index += l;
1871             if (s->index == 4) {
1872                 /* got length */
1873                 s->packet_len = ntohl(*(uint32_t *)s->buf);
1874                 s->index = 0;
1875                 s->state = 1;
1876             }
1877             break;
1878         case 1:
1879             l = s->packet_len - s->index;
1880             if (l > size)
1881                 l = size;
1882             if (s->index + l <= sizeof(s->buf)) {
1883                 memcpy(s->buf + s->index, buf, l);
1884             } else {
1885                 fprintf(stderr, "serious error: oversized packet received,"
1886                     "connection terminated.\n");
1887                 s->state = 0;
1888                 goto eoc;
1889             }
1890
1891             s->index += l;
1892             buf += l;
1893             size -= l;
1894             if (s->index >= s->packet_len) {
1895                 qemu_send_packet(s->vc, s->buf, s->packet_len);
1896                 s->index = 0;
1897                 s->state = 0;
1898             }
1899             break;
1900         }
1901     }
1902 }
1903
1904 static void net_socket_send_dgram(void *opaque)
1905 {
1906     NetSocketState *s = opaque;
1907     int size;
1908
1909     size = recv(s->fd, (void *)s->buf, sizeof(s->buf), 0);
1910     if (size < 0)
1911         return;
1912     if (size == 0) {
1913         /* end of connection */
1914         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1915         return;
1916     }
1917     qemu_send_packet(s->vc, s->buf, size);
1918 }
1919
1920 static int net_socket_mcast_create(struct sockaddr_in *mcastaddr)
1921 {
1922     struct ip_mreq imr;
1923     int fd;
1924     int val, ret;
1925     if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
1926         fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n",
1927                 inet_ntoa(mcastaddr->sin_addr),
1928                 (int)ntohl(mcastaddr->sin_addr.s_addr));
1929         return -1;
1930
1931     }
1932     fd = socket(PF_INET, SOCK_DGRAM, 0);
1933     if (fd < 0) {
1934         perror("socket(PF_INET, SOCK_DGRAM)");
1935         return -1;
1936     }
1937
1938     val = 1;
1939     ret=setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
1940                    (const char *)&val, sizeof(val));
1941     if (ret < 0) {
1942         perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
1943         goto fail;
1944     }
1945
1946     ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
1947     if (ret < 0) {
1948         perror("bind");
1949         goto fail;
1950     }
1951
1952     /* Add host to multicast group */
1953     imr.imr_multiaddr = mcastaddr->sin_addr;
1954     imr.imr_interface.s_addr = htonl(INADDR_ANY);
1955
1956     ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1957                      (const char *)&imr, sizeof(struct ip_mreq));
1958     if (ret < 0) {
1959         perror("setsockopt(IP_ADD_MEMBERSHIP)");
1960         goto fail;
1961     }
1962
1963     /* Force mcast msgs to loopback (eg. several QEMUs in same host */
1964     val = 1;
1965     ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1966                    (const char *)&val, sizeof(val));
1967     if (ret < 0) {
1968         perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
1969         goto fail;
1970     }
1971
1972     socket_set_nonblock(fd);
1973     return fd;
1974 fail:
1975     if (fd >= 0)
1976         closesocket(fd);
1977     return -1;
1978 }
1979
1980 static void net_socket_cleanup(VLANClientState *vc)
1981 {
1982     NetSocketState *s = vc->opaque;
1983     qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1984     close(s->fd);
1985     qemu_free(s);
1986 }
1987
1988 static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
1989                                                 const char *model,
1990                                                 const char *name,
1991                                                 int fd, int is_connected)
1992 {
1993     struct sockaddr_in saddr;
1994     int newfd;
1995     socklen_t saddr_len;
1996     NetSocketState *s;
1997
1998     /* fd passed: multicast: "learn" dgram_dst address from bound address and save it
1999      * Because this may be "shared" socket from a "master" process, datagrams would be recv()
2000      * by ONLY ONE process: we must "clone" this dgram socket --jjo
2001      */
2002
2003     if (is_connected) {
2004         if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
2005             /* must be bound */
2006             if (saddr.sin_addr.s_addr==0) {
2007                 fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, cannot setup multicast dst addr\n",
2008                         fd);
2009                 return NULL;
2010             }
2011             /* clone dgram socket */
2012             newfd = net_socket_mcast_create(&saddr);
2013             if (newfd < 0) {
2014                 /* error already reported by net_socket_mcast_create() */
2015                 close(fd);
2016                 return NULL;
2017             }
2018             /* clone newfd to fd, close newfd */
2019             dup2(newfd, fd);
2020             close(newfd);
2021
2022         } else {
2023             fprintf(stderr, "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
2024                     fd, strerror(errno));
2025             return NULL;
2026         }
2027     }
2028
2029     s = qemu_mallocz(sizeof(NetSocketState));
2030     s->fd = fd;
2031
2032     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, net_socket_receive_dgram,
2033                                  NULL, net_socket_cleanup, s);
2034     qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s);
2035
2036     /* mcast: save bound address as dst */
2037     if (is_connected) s->dgram_dst=saddr;
2038
2039     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2040             "socket: fd=%d (%s mcast=%s:%d)",
2041             fd, is_connected? "cloned" : "",
2042             inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2043     return s;
2044 }
2045
2046 static void net_socket_connect(void *opaque)
2047 {
2048     NetSocketState *s = opaque;
2049     qemu_set_fd_handler(s->fd, net_socket_send, NULL, s);
2050 }
2051
2052 static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
2053                                                  const char *model,
2054                                                  const char *name,
2055                                                  int fd, int is_connected)
2056 {
2057     NetSocketState *s;
2058     s = qemu_mallocz(sizeof(NetSocketState));
2059     s->fd = fd;
2060     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, net_socket_receive,
2061                                  NULL, net_socket_cleanup, s);
2062     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2063              "socket: fd=%d", fd);
2064     if (is_connected) {
2065         net_socket_connect(s);
2066     } else {
2067         qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
2068     }
2069     return s;
2070 }
2071
2072 static NetSocketState *net_socket_fd_init(VLANState *vlan,
2073                                           const char *model, const char *name,
2074                                           int fd, int is_connected)
2075 {
2076     int so_type=-1, optlen=sizeof(so_type);
2077
2078     if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type,
2079         (socklen_t *)&optlen)< 0) {
2080         fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n", fd);
2081         return NULL;
2082     }
2083     switch(so_type) {
2084     case SOCK_DGRAM:
2085         return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected);
2086     case SOCK_STREAM:
2087         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
2088     default:
2089         /* who knows ... this could be a eg. a pty, do warn and continue as stream */
2090         fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
2091         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
2092     }
2093     return NULL;
2094 }
2095
2096 static void net_socket_accept(void *opaque)
2097 {
2098     NetSocketListenState *s = opaque;
2099     NetSocketState *s1;
2100     struct sockaddr_in saddr;
2101     socklen_t len;
2102     int fd;
2103
2104     for(;;) {
2105         len = sizeof(saddr);
2106         fd = accept(s->fd, (struct sockaddr *)&saddr, &len);
2107         if (fd < 0 && errno != EINTR) {
2108             return;
2109         } else if (fd >= 0) {
2110             break;
2111         }
2112     }
2113     s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1);
2114     if (!s1) {
2115         closesocket(fd);
2116     } else {
2117         snprintf(s1->vc->info_str, sizeof(s1->vc->info_str),
2118                  "socket: connection from %s:%d",
2119                  inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2120     }
2121 }
2122
2123 static int net_socket_listen_init(VLANState *vlan,
2124                                   const char *model,
2125                                   const char *name,
2126                                   const char *host_str)
2127 {
2128     NetSocketListenState *s;
2129     int fd, val, ret;
2130     struct sockaddr_in saddr;
2131
2132     if (parse_host_port(&saddr, host_str) < 0)
2133         return -1;
2134
2135     s = qemu_mallocz(sizeof(NetSocketListenState));
2136
2137     fd = socket(PF_INET, SOCK_STREAM, 0);
2138     if (fd < 0) {
2139         perror("socket");
2140         return -1;
2141     }
2142     socket_set_nonblock(fd);
2143
2144     /* allow fast reuse */
2145     val = 1;
2146     setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));
2147
2148     ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
2149     if (ret < 0) {
2150         perror("bind");
2151         return -1;
2152     }
2153     ret = listen(fd, 0);
2154     if (ret < 0) {
2155         perror("listen");
2156         return -1;
2157     }
2158     s->vlan = vlan;
2159     s->model = strdup(model);
2160     s->name = name ? strdup(name) : NULL;
2161     s->fd = fd;
2162     qemu_set_fd_handler(fd, net_socket_accept, NULL, s);
2163     return 0;
2164 }
2165
2166 static int net_socket_connect_init(VLANState *vlan,
2167                                    const char *model,
2168                                    const char *name,
2169                                    const char *host_str)
2170 {
2171     NetSocketState *s;
2172     int fd, connected, ret, err;
2173     struct sockaddr_in saddr;
2174
2175     if (parse_host_port(&saddr, host_str) < 0)
2176         return -1;
2177
2178     fd = socket(PF_INET, SOCK_STREAM, 0);
2179     if (fd < 0) {
2180         perror("socket");
2181         return -1;
2182     }
2183     socket_set_nonblock(fd);
2184
2185     connected = 0;
2186     for(;;) {
2187         ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
2188         if (ret < 0) {
2189             err = socket_error();
2190             if (err == EINTR || err == EWOULDBLOCK) {
2191             } else if (err == EINPROGRESS) {
2192                 break;
2193 #ifdef _WIN32
2194             } else if (err == WSAEALREADY) {
2195                 break;
2196 #endif
2197             } else {
2198                 perror("connect");
2199                 closesocket(fd);
2200                 return -1;
2201             }
2202         } else {
2203             connected = 1;
2204             break;
2205         }
2206     }
2207     s = net_socket_fd_init(vlan, model, name, fd, connected);
2208     if (!s)
2209         return -1;
2210     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2211              "socket: connect to %s:%d",
2212              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2213     return 0;
2214 }
2215
2216 static int net_socket_mcast_init(VLANState *vlan,
2217                                  const char *model,
2218                                  const char *name,
2219                                  const char *host_str)
2220 {
2221     NetSocketState *s;
2222     int fd;
2223     struct sockaddr_in saddr;
2224
2225     if (parse_host_port(&saddr, host_str) < 0)
2226         return -1;
2227
2228
2229     fd = net_socket_mcast_create(&saddr);
2230     if (fd < 0)
2231         return -1;
2232
2233     s = net_socket_fd_init(vlan, model, name, fd, 0);
2234     if (!s)
2235         return -1;
2236
2237     s->dgram_dst = saddr;
2238
2239     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2240              "socket: mcast=%s:%d",
2241              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2242     return 0;
2243
2244 }
2245
2246 typedef struct DumpState {
2247     VLANClientState *pcap_vc;
2248     int fd;
2249     int pcap_caplen;
2250 } DumpState;
2251
2252 #define PCAP_MAGIC 0xa1b2c3d4
2253
2254 struct pcap_file_hdr {
2255     uint32_t magic;
2256     uint16_t version_major;
2257     uint16_t version_minor;
2258     int32_t thiszone;
2259     uint32_t sigfigs;
2260     uint32_t snaplen;
2261     uint32_t linktype;
2262 };
2263
2264 struct pcap_sf_pkthdr {
2265     struct {
2266         int32_t tv_sec;
2267         int32_t tv_usec;
2268     } ts;
2269     uint32_t caplen;
2270     uint32_t len;
2271 };
2272
2273 static ssize_t dump_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
2274 {
2275     DumpState *s = vc->opaque;
2276     struct pcap_sf_pkthdr hdr;
2277     int64_t ts;
2278     int caplen;
2279
2280     /* Early return in case of previous error. */
2281     if (s->fd < 0) {
2282         return size;
2283     }
2284
2285     ts = muldiv64(qemu_get_clock(vm_clock), 1000000, ticks_per_sec);
2286     caplen = size > s->pcap_caplen ? s->pcap_caplen : size;
2287
2288     hdr.ts.tv_sec = ts / 1000000;
2289     hdr.ts.tv_usec = ts % 1000000;
2290     hdr.caplen = caplen;
2291     hdr.len = size;
2292     if (write(s->fd, &hdr, sizeof(hdr)) != sizeof(hdr) ||
2293         write(s->fd, buf, caplen) != caplen) {
2294         qemu_log("-net dump write error - stop dump\n");
2295         close(s->fd);
2296         s->fd = -1;
2297     }
2298
2299     return size;
2300 }
2301
2302 static void net_dump_cleanup(VLANClientState *vc)
2303 {
2304     DumpState *s = vc->opaque;
2305
2306     close(s->fd);
2307     qemu_free(s);
2308 }
2309
2310 static int net_dump_init(Monitor *mon, VLANState *vlan, const char *device,
2311                          const char *name, const char *filename, int len)
2312 {
2313     struct pcap_file_hdr hdr;
2314     DumpState *s;
2315
2316     s = qemu_malloc(sizeof(DumpState));
2317
2318     s->fd = open(filename, O_CREAT | O_WRONLY | O_BINARY, 0644);
2319     if (s->fd < 0) {
2320         config_error(mon, "-net dump: can't open %s\n", filename);
2321         return -1;
2322     }
2323
2324     s->pcap_caplen = len;
2325
2326     hdr.magic = PCAP_MAGIC;
2327     hdr.version_major = 2;
2328     hdr.version_minor = 4;
2329     hdr.thiszone = 0;
2330     hdr.sigfigs = 0;
2331     hdr.snaplen = s->pcap_caplen;
2332     hdr.linktype = 1;
2333
2334     if (write(s->fd, &hdr, sizeof(hdr)) < sizeof(hdr)) {
2335         config_error(mon, "-net dump write error: %s\n", strerror(errno));
2336         close(s->fd);
2337         qemu_free(s);
2338         return -1;
2339     }
2340
2341     s->pcap_vc = qemu_new_vlan_client(vlan, device, name, NULL, dump_receive, NULL,
2342                                       net_dump_cleanup, s);
2343     snprintf(s->pcap_vc->info_str, sizeof(s->pcap_vc->info_str),
2344              "dump to %s (len=%d)", filename, len);
2345     return 0;
2346 }
2347
2348 /* find or alloc a new VLAN */
2349 VLANState *qemu_find_vlan(int id, int allocate)
2350 {
2351     VLANState **pvlan, *vlan;
2352     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2353         if (vlan->id == id)
2354             return vlan;
2355     }
2356     if (!allocate) {
2357         return NULL;
2358     }
2359     vlan = qemu_mallocz(sizeof(VLANState));
2360     vlan->id = id;
2361     vlan->next = NULL;
2362     pvlan = &first_vlan;
2363     while (*pvlan != NULL)
2364         pvlan = &(*pvlan)->next;
2365     *pvlan = vlan;
2366     return vlan;
2367 }
2368
2369 static int nic_get_free_idx(void)
2370 {
2371     int index;
2372
2373     for (index = 0; index < MAX_NICS; index++)
2374         if (!nd_table[index].used)
2375             return index;
2376     return -1;
2377 }
2378
2379 void qemu_check_nic_model(NICInfo *nd, const char *model)
2380 {
2381     const char *models[2];
2382
2383     models[0] = model;
2384     models[1] = NULL;
2385
2386     qemu_check_nic_model_list(nd, models, model);
2387 }
2388
2389 void qemu_check_nic_model_list(NICInfo *nd, const char * const *models,
2390                                const char *default_model)
2391 {
2392     int i, exit_status = 0;
2393
2394     if (!nd->model)
2395         nd->model = strdup(default_model);
2396
2397     if (strcmp(nd->model, "?") != 0) {
2398         for (i = 0 ; models[i]; i++)
2399             if (strcmp(nd->model, models[i]) == 0)
2400                 return;
2401
2402         fprintf(stderr, "qemu: Unsupported NIC model: %s\n", nd->model);
2403         exit_status = 1;
2404     }
2405
2406     fprintf(stderr, "qemu: Supported NIC models: ");
2407     for (i = 0 ; models[i]; i++)
2408         fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
2409
2410     exit(exit_status);
2411 }
2412
2413 int net_client_init(Monitor *mon, const char *device, const char *p)
2414 {
2415     char buf[1024];
2416     int vlan_id, ret;
2417     VLANState *vlan;
2418     char *name = NULL;
2419
2420     vlan_id = 0;
2421     if (get_param_value(buf, sizeof(buf), "vlan", p)) {
2422         vlan_id = strtol(buf, NULL, 0);
2423     }
2424     vlan = qemu_find_vlan(vlan_id, 1);
2425
2426     if (get_param_value(buf, sizeof(buf), "name", p)) {
2427         name = qemu_strdup(buf);
2428     }
2429     if (!strcmp(device, "nic")) {
2430         static const char * const nic_params[] = {
2431             "vlan", "name", "macaddr", "model", "addr", "id", "vectors", NULL
2432         };
2433         NICInfo *nd;
2434         uint8_t *macaddr;
2435         int idx = nic_get_free_idx();
2436
2437         if (check_params(buf, sizeof(buf), nic_params, p) < 0) {
2438             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2439             ret = -1;
2440             goto out;
2441         }
2442         if (idx == -1 || nb_nics >= MAX_NICS) {
2443             config_error(mon, "Too Many NICs\n");
2444             ret = -1;
2445             goto out;
2446         }
2447         nd = &nd_table[idx];
2448         macaddr = nd->macaddr;
2449         macaddr[0] = 0x52;
2450         macaddr[1] = 0x54;
2451         macaddr[2] = 0x00;
2452         macaddr[3] = 0x12;
2453         macaddr[4] = 0x34;
2454         macaddr[5] = 0x56 + idx;
2455
2456         if (get_param_value(buf, sizeof(buf), "macaddr", p)) {
2457             if (parse_macaddr(macaddr, buf) < 0) {
2458                 config_error(mon, "invalid syntax for ethernet address\n");
2459                 ret = -1;
2460                 goto out;
2461             }
2462         }
2463         if (get_param_value(buf, sizeof(buf), "model", p)) {
2464             nd->model = strdup(buf);
2465         }
2466         if (get_param_value(buf, sizeof(buf), "addr", p)) {
2467             nd->devaddr = strdup(buf);
2468         }
2469         if (get_param_value(buf, sizeof(buf), "id", p)) {
2470             nd->id = strdup(buf);
2471         }
2472         nd->nvectors = NIC_NVECTORS_UNSPECIFIED;
2473         if (get_param_value(buf, sizeof(buf), "vectors", p)) {
2474             char *endptr;
2475             long vectors = strtol(buf, &endptr, 0);
2476             if (*endptr) {
2477                 config_error(mon, "invalid syntax for # of vectors\n");
2478                 ret = -1;
2479                 goto out;
2480             }
2481             if (vectors < 0 || vectors > 0x7ffffff) {
2482                 config_error(mon, "invalid # of vectors\n");
2483                 ret = -1;
2484                 goto out;
2485             }
2486             nd->nvectors = vectors;
2487         }
2488         nd->vlan = vlan;
2489         nd->name = name;
2490         nd->used = 1;
2491         name = NULL;
2492         nb_nics++;
2493         vlan->nb_guest_devs++;
2494         ret = idx;
2495     } else
2496     if (!strcmp(device, "none")) {
2497         if (*p != '\0') {
2498             config_error(mon, "'none' takes no parameters\n");
2499             ret = -1;
2500             goto out;
2501         }
2502         /* does nothing. It is needed to signal that no network cards
2503            are wanted */
2504         ret = 0;
2505     } else
2506 #ifdef CONFIG_SLIRP
2507     if (!strcmp(device, "user")) {
2508         static const char * const slirp_params[] = {
2509             "vlan", "name", "hostname", "restrict", "ip", "net", "host",
2510             "tftp", "bootfile", "dhcpstart", "dns", "smb", "smbserver",
2511             "hostfwd", "guestfwd", NULL
2512         };
2513         struct slirp_config_str *config;
2514         int restricted = 0;
2515         char *vnet = NULL;
2516         char *vhost = NULL;
2517         char *vhostname = NULL;
2518         char *tftp_export = NULL;
2519         char *bootfile = NULL;
2520         char *vdhcp_start = NULL;
2521         char *vnamesrv = NULL;
2522         char *smb_export = NULL;
2523         char *vsmbsrv = NULL;
2524         const char *q;
2525
2526         if (check_params(buf, sizeof(buf), slirp_params, p) < 0) {
2527             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2528             ret = -1;
2529             goto out;
2530         }
2531         if (get_param_value(buf, sizeof(buf), "ip", p)) {
2532             int vnet_buflen = strlen(buf) + strlen("/24") + 1;
2533             /* emulate legacy parameter */
2534             vnet = qemu_malloc(vnet_buflen);
2535             pstrcpy(vnet, vnet_buflen, buf);
2536             pstrcat(vnet, vnet_buflen, "/24");
2537         }
2538         if (get_param_value(buf, sizeof(buf), "net", p)) {
2539             vnet = qemu_strdup(buf);
2540         }
2541         if (get_param_value(buf, sizeof(buf), "host", p)) {
2542             vhost = qemu_strdup(buf);
2543         }
2544         if (get_param_value(buf, sizeof(buf), "hostname", p)) {
2545             vhostname = qemu_strdup(buf);
2546         }
2547         if (get_param_value(buf, sizeof(buf), "restrict", p)) {
2548             restricted = (buf[0] == 'y') ? 1 : 0;
2549         }
2550         if (get_param_value(buf, sizeof(buf), "dhcpstart", p)) {
2551             vdhcp_start = qemu_strdup(buf);
2552         }
2553         if (get_param_value(buf, sizeof(buf), "dns", p)) {
2554             vnamesrv = qemu_strdup(buf);
2555         }
2556         if (get_param_value(buf, sizeof(buf), "tftp", p)) {
2557             tftp_export = qemu_strdup(buf);
2558         }
2559         if (get_param_value(buf, sizeof(buf), "bootfile", p)) {
2560             bootfile = qemu_strdup(buf);
2561         }
2562         if (get_param_value(buf, sizeof(buf), "smb", p)) {
2563             smb_export = qemu_strdup(buf);
2564             if (get_param_value(buf, sizeof(buf), "smbserver", p)) {
2565                 vsmbsrv = qemu_strdup(buf);
2566             }
2567         }
2568         q = p;
2569         while (1) {
2570             config = qemu_malloc(sizeof(*config));
2571             if (!get_next_param_value(config->str, sizeof(config->str),
2572                                       "hostfwd", &q)) {
2573                 break;
2574             }
2575             config->flags = SLIRP_CFG_HOSTFWD;
2576             config->next = slirp_configs;
2577             slirp_configs = config;
2578             config = NULL;
2579         }
2580         q = p;
2581         while (1) {
2582             config = qemu_malloc(sizeof(*config));
2583             if (!get_next_param_value(config->str, sizeof(config->str),
2584                                       "guestfwd", &q)) {
2585                 break;
2586             }
2587             config->flags = 0;
2588             config->next = slirp_configs;
2589             slirp_configs = config;
2590             config = NULL;
2591         }
2592         qemu_free(config);
2593         vlan->nb_host_devs++;
2594         ret = net_slirp_init(mon, vlan, device, name, restricted, vnet, vhost,
2595                              vhostname, tftp_export, bootfile, vdhcp_start,
2596                              vnamesrv, smb_export, vsmbsrv);
2597         qemu_free(vnet);
2598         qemu_free(vhost);
2599         qemu_free(vhostname);
2600         qemu_free(tftp_export);
2601         qemu_free(bootfile);
2602         qemu_free(vdhcp_start);
2603         qemu_free(vnamesrv);
2604         qemu_free(smb_export);
2605         qemu_free(vsmbsrv);
2606     } else if (!strcmp(device, "channel")) {
2607         if (TAILQ_EMPTY(&slirp_stacks)) {
2608             struct slirp_config_str *config;
2609
2610             config = qemu_malloc(sizeof(*config));
2611             pstrcpy(config->str, sizeof(config->str), p);
2612             config->flags = SLIRP_CFG_LEGACY;
2613             config->next = slirp_configs;
2614             slirp_configs = config;
2615         } else {
2616             slirp_guestfwd(TAILQ_FIRST(&slirp_stacks), mon, p, 1);
2617         }
2618         ret = 0;
2619     } else
2620 #endif
2621 #ifdef _WIN32
2622     if (!strcmp(device, "tap")) {
2623         static const char * const tap_params[] = {
2624             "vlan", "name", "ifname", NULL
2625         };
2626         char ifname[64];
2627
2628         if (check_params(buf, sizeof(buf), tap_params, p) < 0) {
2629             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2630             ret = -1;
2631             goto out;
2632         }
2633         if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
2634             config_error(mon, "tap: no interface name\n");
2635             ret = -1;
2636             goto out;
2637         }
2638         vlan->nb_host_devs++;
2639         ret = tap_win32_init(vlan, device, name, ifname);
2640     } else
2641 #elif defined (_AIX)
2642 #else
2643     if (!strcmp(device, "tap")) {
2644         char ifname[64], chkbuf[64];
2645         char setup_script[1024], down_script[1024];
2646         TAPState *s;
2647         int fd;
2648         vlan->nb_host_devs++;
2649         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
2650             static const char * const fd_params[] = {
2651                 "vlan", "name", "fd", "sndbuf", NULL
2652             };
2653             if (check_params(chkbuf, sizeof(chkbuf), fd_params, p) < 0) {
2654                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2655                 ret = -1;
2656                 goto out;
2657             }
2658             fd = strtol(buf, NULL, 0);
2659             fcntl(fd, F_SETFL, O_NONBLOCK);
2660             s = net_tap_fd_init(vlan, device, name, fd);
2661         } else {
2662             static const char * const tap_params[] = {
2663                 "vlan", "name", "ifname", "script", "downscript", "sndbuf", NULL
2664             };
2665             if (check_params(chkbuf, sizeof(chkbuf), tap_params, p) < 0) {
2666                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2667                 ret = -1;
2668                 goto out;
2669             }
2670             if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
2671                 ifname[0] = '\0';
2672             }
2673             if (get_param_value(setup_script, sizeof(setup_script), "script", p) == 0) {
2674                 pstrcpy(setup_script, sizeof(setup_script), DEFAULT_NETWORK_SCRIPT);
2675             }
2676             if (get_param_value(down_script, sizeof(down_script), "downscript", p) == 0) {
2677                 pstrcpy(down_script, sizeof(down_script), DEFAULT_NETWORK_DOWN_SCRIPT);
2678             }
2679             s = net_tap_init(vlan, device, name, ifname, setup_script, down_script);
2680         }
2681         if (s != NULL) {
2682             const char *sndbuf_str = NULL;
2683             if (get_param_value(buf, sizeof(buf), "sndbuf", p)) {
2684                 sndbuf_str = buf;
2685             }
2686             tap_set_sndbuf(s, sndbuf_str, mon);
2687             ret = 0;
2688         } else {
2689             ret = -1;
2690         }
2691     } else
2692 #endif
2693     if (!strcmp(device, "socket")) {
2694         char chkbuf[64];
2695         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
2696             static const char * const fd_params[] = {
2697                 "vlan", "name", "fd", NULL
2698             };
2699             int fd;
2700             if (check_params(chkbuf, sizeof(chkbuf), fd_params, p) < 0) {
2701                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2702                 ret = -1;
2703                 goto out;
2704             }
2705             fd = strtol(buf, NULL, 0);
2706             ret = -1;
2707             if (net_socket_fd_init(vlan, device, name, fd, 1))
2708                 ret = 0;
2709         } else if (get_param_value(buf, sizeof(buf), "listen", p) > 0) {
2710             static const char * const listen_params[] = {
2711                 "vlan", "name", "listen", NULL
2712             };
2713             if (check_params(chkbuf, sizeof(chkbuf), listen_params, p) < 0) {
2714                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2715                 ret = -1;
2716                 goto out;
2717             }
2718             ret = net_socket_listen_init(vlan, device, name, buf);
2719         } else if (get_param_value(buf, sizeof(buf), "connect", p) > 0) {
2720             static const char * const connect_params[] = {
2721                 "vlan", "name", "connect", NULL
2722             };
2723             if (check_params(chkbuf, sizeof(chkbuf), connect_params, p) < 0) {
2724                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2725                 ret = -1;
2726                 goto out;
2727             }
2728             ret = net_socket_connect_init(vlan, device, name, buf);
2729         } else if (get_param_value(buf, sizeof(buf), "mcast", p) > 0) {
2730             static const char * const mcast_params[] = {
2731                 "vlan", "name", "mcast", NULL
2732             };
2733             if (check_params(chkbuf, sizeof(chkbuf), mcast_params, p) < 0) {
2734                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2735                 ret = -1;
2736                 goto out;
2737             }
2738             ret = net_socket_mcast_init(vlan, device, name, buf);
2739         } else {
2740             config_error(mon, "Unknown socket options: %s\n", p);
2741             ret = -1;
2742             goto out;
2743         }
2744         vlan->nb_host_devs++;
2745     } else
2746 #ifdef CONFIG_VDE
2747     if (!strcmp(device, "vde")) {
2748         static const char * const vde_params[] = {
2749             "vlan", "name", "sock", "port", "group", "mode", NULL
2750         };
2751         char vde_sock[1024], vde_group[512];
2752         int vde_port, vde_mode;
2753
2754         if (check_params(buf, sizeof(buf), vde_params, p) < 0) {
2755             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2756             ret = -1;
2757             goto out;
2758         }
2759         vlan->nb_host_devs++;
2760         if (get_param_value(vde_sock, sizeof(vde_sock), "sock", p) <= 0) {
2761             vde_sock[0] = '\0';
2762         }
2763         if (get_param_value(buf, sizeof(buf), "port", p) > 0) {
2764             vde_port = strtol(buf, NULL, 10);
2765         } else {
2766             vde_port = 0;
2767         }
2768         if (get_param_value(vde_group, sizeof(vde_group), "group", p) <= 0) {
2769             vde_group[0] = '\0';
2770         }
2771         if (get_param_value(buf, sizeof(buf), "mode", p) > 0) {
2772             vde_mode = strtol(buf, NULL, 8);
2773         } else {
2774             vde_mode = 0700;
2775         }
2776         ret = net_vde_init(vlan, device, name, vde_sock, vde_port, vde_group, vde_mode);
2777     } else
2778 #endif
2779     if (!strcmp(device, "dump")) {
2780         int len = 65536;
2781
2782         if (get_param_value(buf, sizeof(buf), "len", p) > 0) {
2783             len = strtol(buf, NULL, 0);
2784         }
2785         if (!get_param_value(buf, sizeof(buf), "file", p)) {
2786             snprintf(buf, sizeof(buf), "qemu-vlan%d.pcap", vlan_id);
2787         }
2788         ret = net_dump_init(mon, vlan, device, name, buf, len);
2789     } else {
2790         config_error(mon, "Unknown network device: %s\n", device);
2791         ret = -1;
2792         goto out;
2793     }
2794     if (ret < 0) {
2795         config_error(mon, "Could not initialize device '%s'\n", device);
2796     }
2797 out:
2798     qemu_free(name);
2799     return ret;
2800 }
2801
2802 void net_client_uninit(NICInfo *nd)
2803 {
2804     nd->vlan->nb_guest_devs--;
2805     nb_nics--;
2806     nd->used = 0;
2807     free((void *)nd->model);
2808 }
2809
2810 static int net_host_check_device(const char *device)
2811 {
2812     int i;
2813     const char *valid_param_list[] = { "tap", "socket", "dump"
2814 #ifdef CONFIG_SLIRP
2815                                        ,"user"
2816 #endif
2817 #ifdef CONFIG_VDE
2818                                        ,"vde"
2819 #endif
2820     };
2821     for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) {
2822         if (!strncmp(valid_param_list[i], device,
2823                      strlen(valid_param_list[i])))
2824             return 1;
2825     }
2826
2827     return 0;
2828 }
2829
2830 void net_host_device_add(Monitor *mon, const char *device, const char *opts)
2831 {
2832     if (!net_host_check_device(device)) {
2833         monitor_printf(mon, "invalid host network device %s\n", device);
2834         return;
2835     }
2836     if (net_client_init(mon, device, opts ? opts : "") < 0) {
2837         monitor_printf(mon, "adding host network device %s failed\n", device);
2838     }
2839 }
2840
2841 void net_host_device_remove(Monitor *mon, int vlan_id, const char *device)
2842 {
2843     VLANClientState *vc;
2844
2845     vc = qemu_find_vlan_client_by_name(mon, vlan_id, device);
2846     if (!vc) {
2847         return;
2848     }
2849     if (!net_host_check_device(vc->model)) {
2850         monitor_printf(mon, "invalid host network device %s\n", device);
2851         return;
2852     }
2853     qemu_del_vlan_client(vc);
2854 }
2855
2856 int net_client_parse(const char *str)
2857 {
2858     const char *p;
2859     char *q;
2860     char device[64];
2861
2862     p = str;
2863     q = device;
2864     while (*p != '\0' && *p != ',') {
2865         if ((q - device) < sizeof(device) - 1)
2866             *q++ = *p;
2867         p++;
2868     }
2869     *q = '\0';
2870     if (*p == ',')
2871         p++;
2872
2873     return net_client_init(NULL, device, p);
2874 }
2875
2876 void net_set_boot_mask(int net_boot_mask)
2877 {
2878     int i;
2879
2880     /* Only the first four NICs may be bootable */
2881     net_boot_mask = net_boot_mask & 0xF;
2882
2883     for (i = 0; i < nb_nics; i++) {
2884         if (net_boot_mask & (1 << i)) {
2885             nd_table[i].bootable = 1;
2886             net_boot_mask &= ~(1 << i);
2887         }
2888     }
2889
2890     if (net_boot_mask) {
2891         fprintf(stderr, "Cannot boot from non-existent NIC\n");
2892         exit(1);
2893     }
2894 }
2895
2896 void do_info_network(Monitor *mon)
2897 {
2898     VLANState *vlan;
2899     VLANClientState *vc;
2900
2901     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2902         monitor_printf(mon, "VLAN %d devices:\n", vlan->id);
2903         for(vc = vlan->first_client; vc != NULL; vc = vc->next)
2904             monitor_printf(mon, "  %s: %s\n", vc->name, vc->info_str);
2905     }
2906 }
2907
2908 int do_set_link(Monitor *mon, const char *name, const char *up_or_down)
2909 {
2910     VLANState *vlan;
2911     VLANClientState *vc = NULL;
2912
2913     for (vlan = first_vlan; vlan != NULL; vlan = vlan->next)
2914         for (vc = vlan->first_client; vc != NULL; vc = vc->next)
2915             if (strcmp(vc->name, name) == 0)
2916                 goto done;
2917 done:
2918
2919     if (!vc) {
2920         monitor_printf(mon, "could not find network device '%s'", name);
2921         return 0;
2922     }
2923
2924     if (strcmp(up_or_down, "up") == 0)
2925         vc->link_down = 0;
2926     else if (strcmp(up_or_down, "down") == 0)
2927         vc->link_down = 1;
2928     else
2929         monitor_printf(mon, "invalid link status '%s'; only 'up' or 'down' "
2930                        "valid\n", up_or_down);
2931
2932     if (vc->link_status_changed)
2933         vc->link_status_changed(vc);
2934
2935     return 1;
2936 }
2937
2938 void net_cleanup(void)
2939 {
2940     VLANState *vlan;
2941
2942     /* close network clients */
2943     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2944         VLANClientState *vc = vlan->first_client;
2945
2946         while (vc) {
2947             VLANClientState *next = vc->next;
2948
2949             qemu_del_vlan_client(vc);
2950
2951             vc = next;
2952         }
2953     }
2954 }
2955
2956 void net_client_check(void)
2957 {
2958     VLANState *vlan;
2959
2960     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2961         if (vlan->nb_guest_devs == 0 && vlan->nb_host_devs == 0)
2962             continue;
2963         if (vlan->nb_guest_devs == 0)
2964             fprintf(stderr, "Warning: vlan %d with no nics\n", vlan->id);
2965         if (vlan->nb_host_devs == 0)
2966             fprintf(stderr,
2967                     "Warning: vlan %d is not connected to host network\n",
2968                     vlan->id);
2969     }
2970 }