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 // FIXME: #include "qemu-kvm.h"
 114 #include "qemu-common.h"
 115 #include "net.h"
 116 #include "monitor.h"
 117 #include "sysemu.h"
 118 #include "qemu-timer.h"
 119 #include "qemu-char.h"
 120 #include "audio/audio.h"
 121 #include "qemu_socket.h"
 122 #include "qemu-log.h"
 123
 124 #include "slirp/libslirp.h"
 125
 126
 127 static VLANState *first_vlan;
 128
 129 /***********************************************************/
 130 /* network device redirectors */
 131
 132 #if defined(DEBUG_NET) || defined(DEBUG_SLIRP)
 133 static void hex_dump(FILE *f, const uint8_t *buf, int size)
 134 {
 135     int len, i, j, c;
 136
 137     for(i=0;i<size;i+=16) {
 138         len = size - i;
 139         if (len > 16)
 140             len = 16;
 141         fprintf(f, "%08x ", i);
 142         for(j=0;j<16;j++) {
 143             if (j < len)
 144                 fprintf(f, " %02x", buf[i+j]);
 145             else
 146                 fprintf(f, "   ");
 147         }
 148         fprintf(f, " ");
 149         for(j=0;j<len;j++) {
 150             c = buf[i+j];
 151             if (c < ' ' || c > '~')
 152                 c = '.';
 153             fprintf(f, "%c", c);
 154         }
 155         fprintf(f, "\n");
 156     }
 157 }
 158 #endif
 159
 160 static int parse_macaddr(uint8_t *macaddr, const char *p)
 161 {
 162     int i;
 163     char *last_char;
 164     long int offset;
 165
 166     errno = 0;
 167     offset = strtol(p, &last_char, 0);
 168     if (0 == errno && '\0' == *last_char &&
 169             offset >= 0 && offset <= 0xFFFFFF) {
 170         macaddr[3] = (offset & 0xFF0000) >> 16;
 171         macaddr[4] = (offset & 0xFF00) >> 8;
 172         macaddr[5] = offset & 0xFF;
 173         return 0;
 174     } else {
 175         for(i = 0; i < 6; i++) {
 176             macaddr[i] = strtol(p, (char **)&p, 16);
 177             if (i == 5) {
 178                 if (*p != '\0')
 179                     return -1;
 180             } else {
 181                 if (*p != ':' && *p != '-')
 182                     return -1;
 183                 p++;
 184             }
 185         }
 186         return 0;
 187     }
 188
 189     return -1;
 190 }
 191
 192 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
 193 {
 194     const char *p, *p1;
 195     int len;
 196     p = *pp;
 197     p1 = strchr(p, sep);
 198     if (!p1)
 199         return -1;
 200     len = p1 - p;
 201     p1++;
 202     if (buf_size > 0) {
 203         if (len > buf_size - 1)
 204             len = buf_size - 1;
 205         memcpy(buf, p, len);
 206         buf[len] = '\0';
 207     }
 208     *pp = p1;
 209     return 0;
 210 }
 211
 212 int parse_host_src_port(struct sockaddr_in *haddr,
 213                         struct sockaddr_in *saddr,
 214                         const char *input_str)
 215 {
 216     char *str = strdup(input_str);
 217     char *host_str = str;
 218     char *src_str;
 219     const char *src_str2;
 220     char *ptr;
 221
 222     /*
 223      * Chop off any extra arguments at the end of the string which
 224      * would start with a comma, then fill in the src port information
 225      * if it was provided else use the "any address" and "any port".
 226      */
 227     if ((ptr = strchr(str,',')))
 228         *ptr = '\0';
 229
 230     if ((src_str = strchr(input_str,'@'))) {
 231         *src_str = '\0';
 232         src_str++;
 233     }
 234
 235     if (parse_host_port(haddr, host_str) < 0)
 236         goto fail;
 237
 238     src_str2 = src_str;
 239     if (!src_str || *src_str == '\0')
 240         src_str2 = ":0";
 241
 242     if (parse_host_port(saddr, src_str2) < 0)
 243         goto fail;
 244
 245     free(str);
 246     return(0);
 247
 248 fail:
 249     free(str);
 250     return -1;
 251 }
 252
 253 int parse_host_port(struct sockaddr_in *saddr, const char *str)
 254 {
 255     char buf[512];
 256     struct hostent *he;
 257     const char *p, *r;
 258     int port;
 259
 260     p = str;
 261     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 262         return -1;
 263     saddr->sin_family = AF_INET;
 264     if (buf[0] == '\0') {
 265         saddr->sin_addr.s_addr = 0;
 266     } else {
 267         if (qemu_isdigit(buf[0])) {
 268             if (!inet_aton(buf, &saddr->sin_addr))
 269                 return -1;
 270         } else {
 271             if ((he = gethostbyname(buf)) == NULL)
 272                 return - 1;
 273             saddr->sin_addr = *(struct in_addr *)he->h_addr;
 274         }
 275     }
 276     port = strtol(p, (char **)&r, 0);
 277     if (r == p)
 278         return -1;
 279     saddr->sin_port = htons(port);
 280     return 0;
 281 }
 282
 283 #if !defined(_WIN32) && 0
 284 static int parse_unix_path(struct sockaddr_un *uaddr, const char *str)
 285 {
 286     const char *p;
 287     int len;
 288
 289     len = MIN(108, strlen(str));
 290     p = strchr(str, ',');
 291     if (p)
 292         len = MIN(len, p - str);
 293
 294     memset(uaddr, 0, sizeof(*uaddr));
 295
 296     uaddr->sun_family = AF_UNIX;
 297     memcpy(uaddr->sun_path, str, len);
 298
 299     return 0;
 300 }
 301 #endif
 302
 303 void qemu_format_nic_info_str(VLANClientState *vc, uint8_t macaddr[6])
 304 {
 305     snprintf(vc->info_str, sizeof(vc->info_str),
 306              "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x",
 307              vc->model,
 308              macaddr[0], macaddr[1], macaddr[2],
 309              macaddr[3], macaddr[4], macaddr[5]);
 310 }
 311
 312 static char *assign_name(VLANClientState *vc1, const char *model)
 313 {
 314     VLANState *vlan;
 315     char buf[256];
 316     int id = 0;
 317
 318     for (vlan = first_vlan; vlan; vlan = vlan->next) {
 319         VLANClientState *vc;
 320
 321         for (vc = vlan->first_client; vc; vc = vc->next)
 322             if (vc != vc1 && strcmp(vc->model, model) == 0)
 323                 id++;
 324     }
 325
 326     snprintf(buf, sizeof(buf), "%s.%d", model, id);
 327
 328     return strdup(buf);
 329 }
 330
 331 VLANClientState *qemu_new_vlan_client(VLANState *vlan,
 332                                       const char *model,
 333                                       const char *name,
 334                                       NetCanReceive *can_receive,
 335                                       NetReceive *receive,
 336                                       NetReceiveIOV *receive_iov,
 337                                       NetCleanup *cleanup,
 338                                       void *opaque)
 339 {
 340     VLANClientState *vc, **pvc;
 341     vc = qemu_mallocz(sizeof(VLANClientState));
 342     vc->model = strdup(model);
 343     if (name)
 344         vc->name = strdup(name);
 345     else
 346         vc->name = assign_name(vc, model);
 347     vc->can_receive = can_receive;
 348     vc->receive = receive;
 349     vc->receive_iov = receive_iov;
 350     vc->cleanup = cleanup;
 351     vc->opaque = opaque;
 352     vc->vlan = vlan;
 353
 354     vc->next = NULL;
 355     pvc = &vlan->first_client;
 356     while (*pvc != NULL)
 357         pvc = &(*pvc)->next;
 358     *pvc = vc;
 359     return vc;
 360 }
 361
 362 void qemu_del_vlan_client(VLANClientState *vc)
 363 {
 364     VLANClientState **pvc = &vc->vlan->first_client;
 365
 366     while (*pvc != NULL)
 367         if (*pvc == vc) {
 368             *pvc = vc->next;
 369             if (vc->cleanup) {
 370                 vc->cleanup(vc);
 371             }
 372             free(vc->name);
 373             free(vc->model);
 374             qemu_free(vc);
 375             break;
 376         } else
 377             pvc = &(*pvc)->next;
 378 }
 379
 380 VLANClientState *qemu_find_vlan_client(VLANState *vlan, void *opaque)
 381 {
 382     VLANClientState **pvc = &vlan->first_client;
 383
 384     while (*pvc != NULL)
 385         if ((*pvc)->opaque == opaque)
 386             return *pvc;
 387         else
 388             pvc = &(*pvc)->next;
 389
 390     return NULL;
 391 }
 392
 393 static VLANClientState *
 394 qemu_find_vlan_client_by_name(Monitor *mon, int vlan_id,
 395                               const char *client_str)
 396 {
 397     VLANState *vlan;
 398     VLANClientState *vc;
 399
 400     vlan = qemu_find_vlan(vlan_id, 0);
 401     if (!vlan) {
 402         monitor_printf(mon, "unknown VLAN %d\n", vlan_id);
 403         return NULL;
 404     }
 405
 406     for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
 407         if (!strcmp(vc->name, client_str)) {
 408             break;
 409         }
 410     }
 411     if (!vc) {
 412         monitor_printf(mon, "can't find device %s on VLAN %d\n",
 413                        client_str, vlan_id);
 414     }
 415
 416     return vc;
 417 }
 418
 419 int qemu_can_send_packet(VLANClientState *sender)
 420 {
 421     VLANState *vlan = sender->vlan;
 422     VLANClientState *vc;
 423
 424     for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
 425         if (vc == sender) {
 426             continue;
 427         }
 428
 429         /* no can_receive() handler, they can always receive */
 430         if (!vc->can_receive || vc->can_receive(vc)) {
 431             return 1;
 432         }
 433     }
 434     return 0;
 435 }
 436
 437 static int
 438 qemu_deliver_packet(VLANClientState *sender, const uint8_t *buf, int size, int raw)
 439 {
 440     VLANClientState *vc;
 441     int ret = -1;
 442
 443     sender->vlan->delivering = 1;
 444
 445     for (vc = sender->vlan->first_client; vc != NULL; vc = vc->next) {
 446         ssize_t len;
 447
 448         if (vc == sender) {
 449             continue;
 450         }
 451
 452         if (vc->link_down) {
 453             ret = size;
 454             continue;
 455         }
 456
 457         if (raw && vc->receive_raw) {
 458             len = vc->receive_raw(vc, buf, size);
 459         } else {
 460             len = vc->receive(vc, buf, size);
 461         }
 462
 463         ret = (ret >= 0) ? ret : len;
 464     }
 465
 466     sender->vlan->delivering = 0;
 467
 468     return ret;
 469 }
 470
 471 void qemu_purge_queued_packets(VLANClientState *vc)
 472 {
 473     VLANPacket **pp = &vc->vlan->send_queue;
 474
 475     while (*pp != NULL) {
 476         VLANPacket *packet = *pp;
 477
 478         if (packet->sender == vc) {
 479             *pp = packet->next;
 480             qemu_free(packet);
 481         } else {
 482             pp = &packet->next;
 483         }
 484     }
 485 }
 486
 487 void qemu_flush_queued_packets(VLANClientState *vc)
 488 {
 489     VLANPacket *packet;
 490
 491     while ((packet = vc->vlan->send_queue) != NULL) {
 492         int ret;
 493
 494         vc->vlan->send_queue = packet->next;
 495
 496         ret = qemu_deliver_packet(packet->sender, packet->data,
 497                                   packet->size, packet->raw);
 498         if (ret == 0 && packet->sent_cb != NULL) {
 499             packet->next = vc->vlan->send_queue;
 500             vc->vlan->send_queue = packet;
 501             break;
 502         }
 503
 504         if (packet->sent_cb)
 505             packet->sent_cb(packet->sender, ret);
 506
 507         qemu_free(packet);
 508     }
 509 }
 510
 511 static void qemu_enqueue_packet(VLANClientState *sender,
 512                                 const uint8_t *buf, int size, int raw,
 513                                 NetPacketSent *sent_cb)
 514 {
 515     VLANPacket *packet;
 516
 517     packet = qemu_malloc(sizeof(VLANPacket) + size);
 518     packet->next = sender->vlan->send_queue;
 519     packet->sender = sender;
 520     packet->size = size;
 521     packet->raw = raw;
 522     packet->sent_cb = sent_cb;
 523     memcpy(packet->data, buf, size);
 524     sender->vlan->send_queue = packet;
 525 }
 526
 527 static ssize_t qemu_send_packet_async2(VLANClientState *sender,
 528                                        const uint8_t *buf, int size, int raw,
 529                                        NetPacketSent *sent_cb)
 530 {
 531     int ret;
 532
 533     if (sender->link_down) {
 534         return size;
 535     }
 536
 537 #ifdef DEBUG_NET
 538     printf("vlan %d send:\n", sender->vlan->id);
 539     hex_dump(stdout, buf, size);
 540 #endif
 541
 542     if (sender->vlan->delivering) {
 543         qemu_enqueue_packet(sender, buf, size, raw, NULL);
 544         return size;
 545     }
 546
 547     ret = qemu_deliver_packet(sender, buf, size, raw);
 548     if (ret == 0 && sent_cb != NULL) {
 549         qemu_enqueue_packet(sender, buf, size, raw, sent_cb);
 550         return 0;
 551     }
 552
 553     qemu_flush_queued_packets(sender);
 554
 555     return ret;
 556 }
 557
 558 ssize_t qemu_send_packet_async(VLANClientState *sender,
 559                                const uint8_t *buf, int size,
 560                                NetPacketSent *sent_cb)
 561 {
 562     return qemu_send_packet_async2(sender, buf, size, 0, sent_cb);
 563 }
 564
 565 ssize_t qemu_send_packet(VLANClientState *sender, const uint8_t *buf, int size)
 566 {
 567     return qemu_send_packet_async2(sender, buf, size, 0, NULL);
 568 }
 569
 570 ssize_t qemu_send_packet_raw(VLANClientState *sender, const uint8_t *buf, int size)
 571 {
 572     return qemu_send_packet_async2(sender, buf, size, 1, NULL);
 573 }
 574
 575 static ssize_t vc_sendv_compat(VLANClientState *vc, const struct iovec *iov,
 576                                int iovcnt)
 577 {
 578     uint8_t buffer[4096];
 579     size_t offset = 0;
 580     int i;
 581
 582     for (i = 0; i < iovcnt; i++) {
 583         size_t len;
 584
 585         len = MIN(sizeof(buffer) - offset, iov[i].iov_len);
 586         memcpy(buffer + offset, iov[i].iov_base, len);
 587         offset += len;
 588     }
 589
 590     return vc->receive(vc, buffer, offset);
 591 }
 592
 593 static ssize_t calc_iov_length(const struct iovec *iov, int iovcnt)
 594 {
 595     size_t offset = 0;
 596     int i;
 597
 598     for (i = 0; i < iovcnt; i++)
 599         offset += iov[i].iov_len;
 600     return offset;
 601 }
 602
 603 static int qemu_deliver_packet_iov(VLANClientState *sender,
 604                                    const struct iovec *iov, int iovcnt)
 605 {
 606     VLANClientState *vc;
 607     int ret = -1;
 608
 609     sender->vlan->delivering = 1;
 610
 611     for (vc = sender->vlan->first_client; vc != NULL; vc = vc->next) {
 612         ssize_t len;
 613
 614         if (vc == sender) {
 615             continue;
 616         }
 617
 618         if (vc->link_down) {
 619             ret = calc_iov_length(iov, iovcnt);
 620             continue;
 621         }
 622
 623         if (vc->receive_iov) {
 624             len = vc->receive_iov(vc, iov, iovcnt);
 625         } else {
 626             len = vc_sendv_compat(vc, iov, iovcnt);
 627         }
 628
 629         ret = (ret >= 0) ? ret : len;
 630     }
 631
 632     sender->vlan->delivering = 0;
 633
 634     return ret;
 635 }
 636
 637 static ssize_t qemu_enqueue_packet_iov(VLANClientState *sender,
 638                                        const struct iovec *iov, int iovcnt,
 639                                        NetPacketSent *sent_cb)
 640 {
 641     VLANPacket *packet;
 642     size_t max_len = 0;
 643     int i;
 644
 645     max_len = calc_iov_length(iov, iovcnt);
 646
 647     packet = qemu_malloc(sizeof(VLANPacket) + max_len);
 648     packet->next = sender->vlan->send_queue;
 649     packet->sender = sender;
 650     packet->sent_cb = sent_cb;
 651     packet->size = 0;
 652     packet->raw = 0;
 653
 654     for (i = 0; i < iovcnt; i++) {
 655         size_t len = iov[i].iov_len;
 656
 657         memcpy(packet->data + packet->size, iov[i].iov_base, len);
 658         packet->size += len;
 659     }
 660
 661     sender->vlan->send_queue = packet;
 662
 663     return packet->size;
 664 }
 665
 666 ssize_t qemu_sendv_packet_async(VLANClientState *sender,
 667                                 const struct iovec *iov, int iovcnt,
 668                                 NetPacketSent *sent_cb)
 669 {
 670     int ret;
 671
 672     if (sender->link_down) {
 673         return calc_iov_length(iov, iovcnt);
 674     }
 675
 676     if (sender->vlan->delivering) {
 677         return qemu_enqueue_packet_iov(sender, iov, iovcnt, NULL);
 678     }
 679
 680     ret = qemu_deliver_packet_iov(sender, iov, iovcnt);
 681     if (ret == 0 && sent_cb != NULL) {
 682         qemu_enqueue_packet_iov(sender, iov, iovcnt, sent_cb);
 683         return 0;
 684     }
 685
 686     qemu_flush_queued_packets(sender);
 687
 688     return ret;
 689 }
 690
 691 ssize_t
 692 qemu_sendv_packet(VLANClientState *vc, const struct iovec *iov, int iovcnt)
 693 {
 694     return qemu_sendv_packet_async(vc, iov, iovcnt, NULL);
 695 }
 696
 697 static void config_error(Monitor *mon, const char *fmt, ...)
 698 {
 699     va_list ap;
 700
 701     va_start(ap, fmt);
 702     if (mon) {
 703         monitor_vprintf(mon, fmt, ap);
 704     } else {
 705         fprintf(stderr, "qemu: ");
 706         vfprintf(stderr, fmt, ap);
 707         exit(1);
 708     }
 709     va_end(ap);
 710 }
 711
 712 #if defined(CONFIG_SLIRP)
 713
 714 /* slirp network adapter */
 715
 716 #define SLIRP_CFG_HOSTFWD 1
 717 #define SLIRP_CFG_LEGACY  2
 718
 719 struct slirp_config_str {
 720     struct slirp_config_str *next;
 721     int flags;
 722     char str[1024];
 723     int legacy_format;
 724 };
 725
 726 typedef struct SlirpState {
 727     TAILQ_ENTRY(SlirpState) entry;
 728     VLANClientState *vc;
 729     Slirp *slirp;
 730 #ifndef _WIN32
 731     char smb_dir[128];
 732 #endif
 733 } SlirpState;
 734
 735 static struct slirp_config_str *slirp_configs;
 736 const char *legacy_tftp_prefix;
 737 const char *legacy_bootp_filename;
 738 static TAILQ_HEAD(slirp_stacks, SlirpState) slirp_stacks =
 739     TAILQ_HEAD_INITIALIZER(slirp_stacks);
 740
 741 static void slirp_hostfwd(SlirpState *s, Monitor *mon, const char *redir_str,
 742                           int legacy_format);
 743 static void slirp_guestfwd(SlirpState *s, Monitor *mon, const char *config_str,
 744                            int legacy_format);
 745
 746 #ifndef _WIN32
 747 static const char *legacy_smb_export;
 748
 749 static void slirp_smb(SlirpState *s, Monitor *mon, const char *exported_dir,
 750                       struct in_addr vserver_addr);
 751 static void slirp_smb_cleanup(SlirpState *s);
 752 #else
 753 static inline void slirp_smb_cleanup(SlirpState *s) { }
 754 #endif
 755
 756 int slirp_can_output(void *opaque)
 757 {
 758     SlirpState *s = opaque;
 759
 760     return qemu_can_send_packet(s->vc);
 761 }
 762
 763 void slirp_output(void *opaque, const uint8_t *pkt, int pkt_len)
 764 {
 765     SlirpState *s = opaque;
 766
 767 #ifdef DEBUG_SLIRP
 768     printf("slirp output:\n");
 769     hex_dump(stdout, pkt, pkt_len);
 770 #endif
 771     qemu_send_packet(s->vc, pkt, pkt_len);
 772 }
 773
 774 static ssize_t slirp_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
 775 {
 776     SlirpState *s = vc->opaque;
 777
 778 #ifdef DEBUG_SLIRP
 779     printf("slirp input:\n");
 780     hex_dump(stdout, buf, size);
 781 #endif
 782     slirp_input(s->slirp, buf, size);
 783     return size;
 784 }
 785
 786 static void net_slirp_cleanup(VLANClientState *vc)
 787 {
 788     SlirpState *s = vc->opaque;
 789
 790     slirp_cleanup(s->slirp);
 791     slirp_smb_cleanup(s);
 792     TAILQ_REMOVE(&slirp_stacks, s, entry);
 793     qemu_free(s);
 794 }
 795
 796 static int net_slirp_init(Monitor *mon, VLANState *vlan, const char *model,
 797                           const char *name, int restricted,
 798                           const char *vnetwork, const char *vhost,
 799                           const char *vhostname, const char *tftp_export,
 800                           const char *bootfile, const char *vdhcp_start,
 801                           const char *vnameserver, const char *smb_export,
 802                           const char *vsmbserver)
 803 {
 804     /* default settings according to historic slirp */
 805     struct in_addr net  = { .s_addr = htonl(0x0a000000) }; /* 10.0.0.0 */
 806     struct in_addr mask = { .s_addr = htonl(0xff000000) }; /* 255.0.0.0 */
 807     struct in_addr host = { .s_addr = htonl(0x0a000202) }; /* 10.0.2.2 */
 808     struct in_addr dhcp = { .s_addr = htonl(0x0a00020f) }; /* 10.0.2.15 */
 809     struct in_addr dns  = { .s_addr = htonl(0x0a000203) }; /* 10.0.2.3 */
 810 #ifndef _WIN32
 811     struct in_addr smbsrv = { .s_addr = 0 };
 812 #endif
 813     SlirpState *s;
 814     char buf[20];
 815     uint32_t addr;
 816     int shift;
 817     char *end;
 818
 819     if (!tftp_export) {
 820         tftp_export = legacy_tftp_prefix;
 821     }
 822     if (!bootfile) {
 823         bootfile = legacy_bootp_filename;
 824     }
 825
 826     if (vnetwork) {
 827         if (get_str_sep(buf, sizeof(buf), &vnetwork, '/') < 0) {
 828             if (!inet_aton(vnetwork, &net)) {
 829                 return -1;
 830             }
 831             addr = ntohl(net.s_addr);
 832             if (!(addr & 0x80000000)) {
 833                 mask.s_addr = htonl(0xff000000); /* class A */
 834             } else if ((addr & 0xfff00000) == 0xac100000) {
 835                 mask.s_addr = htonl(0xfff00000); /* priv. 172.16.0.0/12 */
 836             } else if ((addr & 0xc0000000) == 0x80000000) {
 837                 mask.s_addr = htonl(0xffff0000); /* class B */
 838             } else if ((addr & 0xffff0000) == 0xc0a80000) {
 839                 mask.s_addr = htonl(0xffff0000); /* priv. 192.168.0.0/16 */
 840             } else if ((addr & 0xffff0000) == 0xc6120000) {
 841                 mask.s_addr = htonl(0xfffe0000); /* tests 198.18.0.0/15 */
 842             } else if ((addr & 0xe0000000) == 0xe0000000) {
 843                 mask.s_addr = htonl(0xffffff00); /* class C */
 844             } else {
 845                 mask.s_addr = htonl(0xfffffff0); /* multicast/reserved */
 846             }
 847         } else {
 848             if (!inet_aton(buf, &net)) {
 849                 return -1;
 850             }
 851             shift = strtol(vnetwork, &end, 10);
 852             if (*end != '\0') {
 853                 if (!inet_aton(vnetwork, &mask)) {
 854                     return -1;
 855                 }
 856             } else if (shift < 4 || shift > 32) {
 857                 return -1;
 858             } else {
 859                 mask.s_addr = htonl(0xffffffff << (32 - shift));
 860             }
 861         }
 862         net.s_addr &= mask.s_addr;
 863         host.s_addr = net.s_addr | (htonl(0x0202) & ~mask.s_addr);
 864         dhcp.s_addr = net.s_addr | (htonl(0x020f) & ~mask.s_addr);
 865         dns.s_addr  = net.s_addr | (htonl(0x0203) & ~mask.s_addr);
 866     }
 867
 868     if (vhost && !inet_aton(vhost, &host)) {
 869         return -1;
 870     }
 871     if ((host.s_addr & mask.s_addr) != net.s_addr) {
 872         return -1;
 873     }
 874
 875     if (vdhcp_start && !inet_aton(vdhcp_start, &dhcp)) {
 876         return -1;
 877     }
 878     if ((dhcp.s_addr & mask.s_addr) != net.s_addr ||
 879         dhcp.s_addr == host.s_addr || dhcp.s_addr == dns.s_addr) {
 880         return -1;
 881     }
 882
 883     if (vnameserver && !inet_aton(vnameserver, &dns)) {
 884         return -1;
 885     }
 886     if ((dns.s_addr & mask.s_addr) != net.s_addr ||
 887         dns.s_addr == host.s_addr) {
 888         return -1;
 889     }
 890
 891 #ifndef _WIN32
 892     if (vsmbserver && !inet_aton(vsmbserver, &smbsrv)) {
 893         return -1;
 894     }
 895 #endif
 896
 897     s = qemu_mallocz(sizeof(SlirpState));
 898     s->slirp = slirp_init(restricted, net, mask, host, vhostname,
 899                           tftp_export, bootfile, dhcp, dns, s);
 900     TAILQ_INSERT_TAIL(&slirp_stacks, s, entry);
 901
 902     while (slirp_configs) {
 903         struct slirp_config_str *config = slirp_configs;
 904
 905         if (config->flags & SLIRP_CFG_HOSTFWD) {
 906             slirp_hostfwd(s, mon, config->str,
 907                           config->flags & SLIRP_CFG_LEGACY);
 908         } else {
 909             slirp_guestfwd(s, mon, config->str,
 910                            config->flags & SLIRP_CFG_LEGACY);
 911         }
 912         slirp_configs = config->next;
 913         qemu_free(config);
 914     }
 915 #ifndef _WIN32
 916     if (!smb_export) {
 917         smb_export = legacy_smb_export;
 918     }
 919     if (smb_export) {
 920         slirp_smb(s, mon, smb_export, smbsrv);
 921     }
 922 #endif
 923
 924     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, slirp_receive, NULL,
 925                                  net_slirp_cleanup, s);
 926     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
 927              "net=%s, restricted=%c", inet_ntoa(net), restricted ? 'y' : 'n');
 928     return 0;
 929 }
 930
 931 static SlirpState *slirp_lookup(Monitor *mon, const char *vlan,
 932                                 const char *stack)
 933 {
 934     VLANClientState *vc;
 935
 936     if (vlan) {
 937         vc = qemu_find_vlan_client_by_name(mon, strtol(vlan, NULL, 0), stack);
 938         if (!vc) {
 939             return NULL;
 940         }
 941         if (strcmp(vc->model, "user")) {
 942             monitor_printf(mon, "invalid device specified\n");
 943             return NULL;
 944         }
 945         return vc->opaque;
 946     } else {
 947         if (TAILQ_EMPTY(&slirp_stacks)) {
 948             monitor_printf(mon, "user mode network stack not in use\n");
 949             return NULL;
 950         }
 951         return TAILQ_FIRST(&slirp_stacks);
 952     }
 953 }
 954
 955 void net_slirp_hostfwd_remove(Monitor *mon, const char *arg1,
 956                               const char *arg2, const char *arg3)
 957 {
 958     struct in_addr host_addr = { .s_addr = INADDR_ANY };
 959     int host_port;
 960     char buf[256] = "";
 961     const char *src_str, *p;
 962     SlirpState *s;
 963     int is_udp = 0;
 964     int err;
 965
 966     if (arg2) {
 967         s = slirp_lookup(mon, arg1, arg2);
 968         src_str = arg3;
 969     } else {
 970         s = slirp_lookup(mon, NULL, NULL);
 971         src_str = arg1;
 972     }
 973     if (!s) {
 974         return;
 975     }
 976
 977     if (!src_str || !src_str[0])
 978         goto fail_syntax;
 979
 980     p = src_str;
 981     get_str_sep(buf, sizeof(buf), &p, ':');
 982
 983     if (!strcmp(buf, "tcp") || buf[0] == '\0') {
 984         is_udp = 0;
 985     } else if (!strcmp(buf, "udp")) {
 986         is_udp = 1;
 987     } else {
 988         goto fail_syntax;
 989     }
 990
 991     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 992         goto fail_syntax;
 993     }
 994     if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
 995         goto fail_syntax;
 996     }
 997
 998     host_port = atoi(p);
 999
1000     err = slirp_remove_hostfwd(TAILQ_FIRST(&slirp_stacks)->slirp, is_udp,
1001                                host_addr, host_port);
1002
1003     monitor_printf(mon, "host forwarding rule for %s %s\n", src_str,
1004                    err ? "removed" : "not found");
1005     return;
1006
1007  fail_syntax:
1008     monitor_printf(mon, "invalid format\n");
1009 }
1010
1011 static void slirp_hostfwd(SlirpState *s, Monitor *mon, const char *redir_str,
1012                           int legacy_format)
1013 {
1014     struct in_addr host_addr = { .s_addr = INADDR_ANY };
1015     struct in_addr guest_addr = { .s_addr = 0 };
1016     int host_port, guest_port;
1017     const char *p;
1018     char buf[256];
1019     int is_udp;
1020     char *end;
1021
1022     p = redir_str;
1023     if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1024         goto fail_syntax;
1025     }
1026     if (!strcmp(buf, "tcp") || buf[0] == '\0') {
1027         is_udp = 0;
1028     } else if (!strcmp(buf, "udp")) {
1029         is_udp = 1;
1030     } else {
1031         goto fail_syntax;
1032     }
1033
1034     if (!legacy_format) {
1035         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1036             goto fail_syntax;
1037         }
1038         if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
1039             goto fail_syntax;
1040         }
1041     }
1042
1043     if (get_str_sep(buf, sizeof(buf), &p, legacy_format ? ':' : '-') < 0) {
1044         goto fail_syntax;
1045     }
1046     host_port = strtol(buf, &end, 0);
1047     if (*end != '\0' || host_port < 1 || host_port > 65535) {
1048         goto fail_syntax;
1049     }
1050
1051     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1052         goto fail_syntax;
1053     }
1054     if (buf[0] != '\0' && !inet_aton(buf, &guest_addr)) {
1055         goto fail_syntax;
1056     }
1057
1058     guest_port = strtol(p, &end, 0);
1059     if (*end != '\0' || guest_port < 1 || guest_port > 65535) {
1060         goto fail_syntax;
1061     }
1062
1063     if (slirp_add_hostfwd(s->slirp, is_udp, host_addr, host_port, guest_addr,
1064                           guest_port) < 0) {
1065         config_error(mon, "could not set up host forwarding rule '%s'\n",
1066                      redir_str);
1067     }
1068     return;
1069
1070  fail_syntax:
1071     config_error(mon, "invalid host forwarding rule '%s'\n", redir_str);
1072 }
1073
1074 void net_slirp_hostfwd_add(Monitor *mon, const char *arg1,
1075                            const char *arg2, const char *arg3)
1076 {
1077     const char *redir_str;
1078     SlirpState *s;
1079
1080     if (arg2) {
1081         s = slirp_lookup(mon, arg1, arg2);
1082         redir_str = arg3;
1083     } else {
1084         s = slirp_lookup(mon, NULL, NULL);
1085         redir_str = arg1;
1086     }
1087     if (s) {
1088         slirp_hostfwd(s, mon, redir_str, 0);
1089     }
1090
1091 }
1092
1093 void net_slirp_redir(const char *redir_str)
1094 {
1095     struct slirp_config_str *config;
1096
1097     if (TAILQ_EMPTY(&slirp_stacks)) {
1098         config = qemu_malloc(sizeof(*config));
1099         pstrcpy(config->str, sizeof(config->str), redir_str);
1100         config->flags = SLIRP_CFG_HOSTFWD | SLIRP_CFG_LEGACY;
1101         config->next = slirp_configs;
1102         slirp_configs = config;
1103         return;
1104     }
1105
1106     slirp_hostfwd(TAILQ_FIRST(&slirp_stacks), NULL, redir_str, 1);
1107 }
1108
1109 #ifndef _WIN32
1110
1111 /* automatic user mode samba server configuration */
1112 static void slirp_smb_cleanup(SlirpState *s)
1113 {
1114     char cmd[128];
1115
1116     if (s->smb_dir[0] != '\0') {
1117         snprintf(cmd, sizeof(cmd), "rm -rf %s", s->smb_dir);
1118         system(cmd);
1119         s->smb_dir[0] = '\0';
1120     }
1121 }
1122
1123 static void slirp_smb(SlirpState* s, Monitor *mon, const char *exported_dir,
1124                       struct in_addr vserver_addr)
1125 {
1126     static int instance;
1127     char smb_conf[128];
1128     char smb_cmdline[128];
1129     FILE *f;
1130
1131     snprintf(s->smb_dir, sizeof(s->smb_dir), "/tmp/qemu-smb.%ld-%d",
1132              (long)getpid(), instance++);
1133     if (mkdir(s->smb_dir, 0700) < 0) {
1134         config_error(mon, "could not create samba server dir '%s'\n",
1135                      s->smb_dir);
1136         return;
1137     }
1138     snprintf(smb_conf, sizeof(smb_conf), "%s/%s", s->smb_dir, "smb.conf");
1139
1140     f = fopen(smb_conf, "w");
1141     if (!f) {
1142         slirp_smb_cleanup(s);
1143         config_error(mon, "could not create samba server "
1144                      "configuration file '%s'\n", smb_conf);
1145         return;
1146     }
1147     fprintf(f,
1148             "[global]\n"
1149             "private dir=%s\n"
1150             "smb ports=0\n"
1151             "socket address=127.0.0.1\n"
1152             "pid directory=%s\n"
1153             "lock directory=%s\n"
1154             "log file=%s/log.smbd\n"
1155             "smb passwd file=%s/smbpasswd\n"
1156             "security = share\n"
1157             "[qemu]\n"
1158             "path=%s\n"
1159             "read only=no\n"
1160             "guest ok=yes\n",
1161             s->smb_dir,
1162             s->smb_dir,
1163             s->smb_dir,
1164             s->smb_dir,
1165             s->smb_dir,
1166             exported_dir
1167             );
1168     fclose(f);
1169
1170     snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -s %s",
1171              SMBD_COMMAND, smb_conf);
1172
1173     if (slirp_add_exec(s->slirp, 0, smb_cmdline, vserver_addr, 139) < 0) {
1174         slirp_smb_cleanup(s);
1175         config_error(mon, "conflicting/invalid smbserver address\n");
1176     }
1177 }
1178
1179 /* automatic user mode samba server configuration (legacy interface) */
1180 void net_slirp_smb(const char *exported_dir)
1181 {
1182     struct in_addr vserver_addr = { .s_addr = 0 };
1183
1184     if (legacy_smb_export) {
1185         fprintf(stderr, "-smb given twice\n");
1186         exit(1);
1187     }
1188     legacy_smb_export = exported_dir;
1189     if (!TAILQ_EMPTY(&slirp_stacks)) {
1190         slirp_smb(TAILQ_FIRST(&slirp_stacks), NULL, exported_dir,
1191                   vserver_addr);
1192     }
1193 }
1194
1195 #endif /* !defined(_WIN32) */
1196
1197 struct GuestFwd {
1198     CharDriverState *hd;
1199     struct in_addr server;
1200     int port;
1201     Slirp *slirp;
1202 };
1203
1204 static int guestfwd_can_read(void *opaque)
1205 {
1206     struct GuestFwd *fwd = opaque;
1207     return slirp_socket_can_recv(fwd->slirp, fwd->server, fwd->port);
1208 }
1209
1210 static void guestfwd_read(void *opaque, const uint8_t *buf, int size)
1211 {
1212     struct GuestFwd *fwd = opaque;
1213     slirp_socket_recv(fwd->slirp, fwd->server, fwd->port, buf, size);
1214 }
1215
1216 static void slirp_guestfwd(SlirpState *s, Monitor *mon, const char *config_str,
1217                            int legacy_format)
1218 {
1219     struct in_addr server = { .s_addr = 0 };
1220     struct GuestFwd *fwd;
1221     const char *p;
1222     char buf[128];
1223     char *end;
1224     int port;
1225
1226     p = config_str;
1227     if (legacy_format) {
1228         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1229             goto fail_syntax;
1230         }
1231     } else {
1232         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1233             goto fail_syntax;
1234         }
1235         if (strcmp(buf, "tcp") && buf[0] != '\0') {
1236             goto fail_syntax;
1237         }
1238         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1239             goto fail_syntax;
1240         }
1241         if (buf[0] != '\0' && !inet_aton(buf, &server)) {
1242             goto fail_syntax;
1243         }
1244         if (get_str_sep(buf, sizeof(buf), &p, '-') < 0) {
1245             goto fail_syntax;
1246         }
1247     }
1248     port = strtol(buf, &end, 10);
1249     if (*end != '\0' || port < 1 || port > 65535) {
1250         goto fail_syntax;
1251     }
1252
1253     fwd = qemu_malloc(sizeof(struct GuestFwd));
1254     snprintf(buf, sizeof(buf), "guestfwd.tcp:%d", port);
1255     fwd->hd = qemu_chr_open(buf, p, NULL);
1256     if (!fwd->hd) {
1257         config_error(mon, "could not open guest forwarding device '%s'\n",
1258                      buf);
1259         qemu_free(fwd);
1260         return;
1261     }
1262     fwd->server = server;
1263     fwd->port = port;
1264     fwd->slirp = s->slirp;
1265
1266     if (slirp_add_exec(s->slirp, 3, fwd->hd, server, port) < 0) {
1267         config_error(mon, "conflicting/invalid host:port in guest forwarding "
1268                      "rule '%s'\n", config_str);
1269         qemu_free(fwd);
1270         return;
1271     }
1272     qemu_chr_add_handlers(fwd->hd, guestfwd_can_read, guestfwd_read,
1273                           NULL, fwd);
1274     return;
1275
1276  fail_syntax:
1277     config_error(mon, "invalid guest forwarding rule '%s'\n", config_str);
1278 }
1279
1280 void do_info_usernet(Monitor *mon)
1281 {
1282     SlirpState *s;
1283
1284     TAILQ_FOREACH(s, &slirp_stacks, entry) {
1285         monitor_printf(mon, "VLAN %d (%s):\n", s->vc->vlan->id, s->vc->name);
1286         slirp_connection_info(s->slirp, mon);
1287     }
1288 }
1289
1290 #endif /* CONFIG_SLIRP */
1291
1292 #ifdef _WIN32
1293
1294 int tap_has_vnet_hdr(void *opaque)
1295 {
1296     return 0;
1297 }
1298
1299 void tap_using_vnet_hdr(void *opaque, int using_vnet_hdr)
1300 {
1301 }
1302
1303 #else /* !defined(_WIN32) */
1304
1305 /* Maximum GSO packet size (64k) plus plenty of room for
1306  * the ethernet and virtio_net headers
1307  */
1308 #define TAP_BUFSIZE (4096 + 65536)
1309
1310 #ifdef IFF_VNET_HDR
1311 #include <linux/virtio_net.h>
1312 #endif
1313
1314 typedef struct TAPState {
1315     VLANClientState *vc;
1316     int fd;
1317     char down_script[1024];
1318     char down_script_arg[128];
1319     uint8_t buf[TAP_BUFSIZE];
1320     unsigned int read_poll : 1;
1321     unsigned int write_poll : 1;
1322     unsigned int has_vnet_hdr : 1;
1323     unsigned int using_vnet_hdr : 1;
1324 } TAPState;
1325
1326 static int launch_script(const char *setup_script, const char *ifname, int fd);
1327
1328 static int tap_can_send(void *opaque);
1329 static void tap_send(void *opaque);
1330 static void tap_writable(void *opaque);
1331
1332 static void tap_update_fd_handler(TAPState *s)
1333 {
1334     qemu_set_fd_handler2(s->fd,
1335                          s->read_poll  ? tap_can_send : NULL,
1336                          s->read_poll  ? tap_send     : NULL,
1337                          s->write_poll ? tap_writable : NULL,
1338                          s);
1339 }
1340
1341 static void tap_read_poll(TAPState *s, int enable)
1342 {
1343     s->read_poll = !!enable;
1344     tap_update_fd_handler(s);
1345 }
1346
1347 static void tap_write_poll(TAPState *s, int enable)
1348 {
1349     s->write_poll = !!enable;
1350     tap_update_fd_handler(s);
1351 }
1352
1353 static void tap_writable(void *opaque)
1354 {
1355     TAPState *s = opaque;
1356
1357     tap_write_poll(s, 0);
1358
1359     qemu_flush_queued_packets(s->vc);
1360 }
1361
1362 static ssize_t tap_receive_iov(VLANClientState *vc, const struct iovec *iov,
1363                                int iovcnt)
1364 {
1365     TAPState *s = vc->opaque;
1366     ssize_t len;
1367
1368     do {
1369         len = writev(s->fd, iov, iovcnt);
1370     } while (len == -1 && errno == EINTR);
1371
1372     if (len == -1 && errno == EAGAIN) {
1373         tap_write_poll(s, 1);
1374         return 0;
1375     }
1376
1377     return len;
1378 }
1379
1380 static ssize_t tap_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1381 {
1382     struct iovec iov[2];
1383     int i = 0;
1384
1385 #ifdef IFF_VNET_HDR
1386     TAPState *s = vc->opaque;
1387     struct virtio_net_hdr hdr = { 0, };
1388
1389     if (s->has_vnet_hdr && !s->using_vnet_hdr) {
1390         iov[i].iov_base = &hdr;
1391         iov[i].iov_len  = sizeof(hdr);
1392         i++;
1393     }
1394 #endif
1395
1396     iov[i].iov_base = (char *) buf;
1397     iov[i].iov_len  = size;
1398     i++;
1399
1400     return tap_receive_iov(vc, iov, i);
1401 }
1402
1403 static ssize_t tap_receive_raw(VLANClientState *vc, const uint8_t *buf, size_t size)
1404 {
1405     struct iovec iov[2];
1406     int i = 0;
1407
1408 #ifdef IFF_VNET_HDR
1409     TAPState *s = vc->opaque;
1410     struct virtio_net_hdr hdr = { 0, };
1411
1412     if (s->has_vnet_hdr && s->using_vnet_hdr) {
1413         iov[i].iov_base = &hdr;
1414         iov[i].iov_len  = sizeof(hdr);
1415         i++;
1416     }
1417 #endif
1418
1419     iov[i].iov_base = (char *) buf;
1420     iov[i].iov_len  = size;
1421     i++;
1422
1423     return tap_receive_iov(vc, iov, i);
1424 }
1425
1426 static int tap_can_send(void *opaque)
1427 {
1428     TAPState *s = opaque;
1429
1430     return qemu_can_send_packet(s->vc);
1431 }
1432
1433 #ifdef __sun__
1434 static ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
1435 {
1436     struct strbuf sbuf;
1437     int f = 0;
1438
1439     sbuf.maxlen = maxlen;
1440     sbuf.buf = (char *)buf;
1441
1442     return getmsg(tapfd, NULL, &sbuf, &f) >= 0 ? sbuf.len : -1;
1443 }
1444 #else
1445 static ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
1446 {
1447     return read(tapfd, buf, maxlen);
1448 }
1449 #endif
1450
1451 static void tap_send_completed(VLANClientState *vc, ssize_t len)
1452 {
1453     TAPState *s = vc->opaque;
1454     tap_read_poll(s, 1);
1455 }
1456
1457 static void tap_send(void *opaque)
1458 {
1459     TAPState *s = opaque;
1460     int size;
1461
1462     do {
1463         size = tap_read_packet(s->fd, s->buf, sizeof(s->buf));
1464         if (size <= 0) {
1465             break;
1466         }
1467
1468         size = qemu_send_packet_async(s->vc, s->buf, size, tap_send_completed);
1469         if (size == 0) {
1470             tap_read_poll(s, 0);
1471         }
1472     } while (size > 0);
1473 }
1474
1475 static void tap_set_sndbuf(TAPState *s, int sndbuf, Monitor *mon)
1476 {
1477 #ifdef TUNSETSNDBUF
1478     if (ioctl(s->fd, TUNSETSNDBUF, &sndbuf) == -1) {
1479         config_error(mon, "TUNSETSNDBUF ioctl failed: %s\n",
1480                      strerror(errno));
1481     }
1482 #else
1483     config_error(mon, "No '-net tap,sndbuf=<nbytes>' support available\n");
1484 #endif
1485 }
1486
1487 int tap_has_vnet_hdr(void *opaque)
1488 {
1489     VLANClientState *vc = opaque;
1490     TAPState *s = vc->opaque;
1491
1492     return s ? s->has_vnet_hdr : 0;
1493 }
1494
1495 void tap_using_vnet_hdr(void *opaque, int using_vnet_hdr)
1496 {
1497     VLANClientState *vc = opaque;
1498     TAPState *s = vc->opaque;
1499
1500     if (!s || !s->has_vnet_hdr)
1501         return;
1502
1503     s->using_vnet_hdr = using_vnet_hdr != 0;
1504 }
1505
1506 static int tap_probe_vnet_hdr(int fd)
1507 {
1508 #if defined(TUNGETIFF) && defined(IFF_VNET_HDR)
1509     struct ifreq ifr;
1510
1511     if (ioctl(fd, TUNGETIFF, &ifr) != 0) {
1512         fprintf(stderr, "TUNGETIFF ioctl() failed: %s\n", strerror(errno));
1513         return 0;
1514     }
1515
1516     return ifr.ifr_flags & IFF_VNET_HDR;
1517 #else
1518     return 0;
1519 #endif
1520 }
1521
1522 #ifdef TUNSETOFFLOAD
1523 static void tap_set_offload(VLANClientState *vc, int csum, int tso4, int tso6,
1524                             int ecn)
1525 {
1526     TAPState *s = vc->opaque;
1527     unsigned int offload = 0;
1528
1529     if (csum) {
1530         offload |= TUN_F_CSUM;
1531         if (tso4)
1532             offload |= TUN_F_TSO4;
1533         if (tso6)
1534             offload |= TUN_F_TSO6;
1535         if ((tso4 || tso6) && ecn)
1536             offload |= TUN_F_TSO_ECN;
1537     }
1538
1539     if (ioctl(s->fd, TUNSETOFFLOAD, offload) != 0)
1540         fprintf(stderr, "TUNSETOFFLOAD ioctl() failed: %s\n",
1541                 strerror(errno));
1542 }
1543 #endif /* TUNSETOFFLOAD */
1544
1545 static void tap_cleanup(VLANClientState *vc)
1546 {
1547     TAPState *s = vc->opaque;
1548
1549     qemu_purge_queued_packets(vc);
1550
1551     if (s->down_script[0])
1552         launch_script(s->down_script, s->down_script_arg, s->fd);
1553
1554     tap_read_poll(s, 0);
1555     tap_write_poll(s, 0);
1556     close(s->fd);
1557     qemu_free(s);
1558 }
1559
1560 /* fd support */
1561
1562 static TAPState *net_tap_fd_init(VLANState *vlan,
1563                                  const char *model,
1564                                  const char *name,
1565                                  int fd,
1566                                  int vnet_hdr)
1567 {
1568     TAPState *s;
1569
1570     s = qemu_mallocz(sizeof(TAPState));
1571     s->fd = fd;
1572     s->has_vnet_hdr = vnet_hdr != 0;
1573     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, tap_receive,
1574                                  tap_receive_iov, tap_cleanup, s);
1575     s->vc->receive_raw = tap_receive_raw;
1576 #ifdef TUNSETOFFLOAD
1577     s->vc->set_offload = tap_set_offload;
1578     tap_set_offload(s->vc, 0, 0, 0, 0);
1579 #endif
1580     tap_read_poll(s, 1);
1581     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "fd=%d", fd);
1582     return s;
1583 }
1584
1585 #if defined (HOST_BSD) || defined (__FreeBSD_kernel__)
1586 static int tap_open(char *ifname, int ifname_size)
1587 {
1588     int fd;
1589     char *dev;
1590     struct stat s;
1591
1592     TFR(fd = open("/dev/tap", O_RDWR));
1593     if (fd < 0) {
1594         fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n");
1595         return -1;
1596     }
1597
1598     fstat(fd, &s);
1599     dev = devname(s.st_rdev, S_IFCHR);
1600     pstrcpy(ifname, ifname_size, dev);
1601
1602     fcntl(fd, F_SETFL, O_NONBLOCK);
1603     return fd;
1604 }
1605 #elif defined(__sun__)
1606 #define TUNNEWPPA       (('T'<<16) | 0x0001)
1607 /*
1608  * Allocate TAP device, returns opened fd.
1609  * Stores dev name in the first arg(must be large enough).
1610  */
1611 static int tap_alloc(char *dev, size_t dev_size)
1612 {
1613     int tap_fd, if_fd, ppa = -1;
1614     static int ip_fd = 0;
1615     char *ptr;
1616
1617     static int arp_fd = 0;
1618     int ip_muxid, arp_muxid;
1619     struct strioctl  strioc_if, strioc_ppa;
1620     int link_type = I_PLINK;;
1621     struct lifreq ifr;
1622     char actual_name[32] = "";
1623
1624     memset(&ifr, 0x0, sizeof(ifr));
1625
1626     if( *dev ){
1627        ptr = dev;
1628        while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
1629        ppa = atoi(ptr);
1630     }
1631
1632     /* Check if IP device was opened */
1633     if( ip_fd )
1634        close(ip_fd);
1635
1636     TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
1637     if (ip_fd < 0) {
1638        syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)");
1639        return -1;
1640     }
1641
1642     TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
1643     if (tap_fd < 0) {
1644        syslog(LOG_ERR, "Can't open /dev/tap");
1645        return -1;
1646     }
1647
1648     /* Assign a new PPA and get its unit number. */
1649     strioc_ppa.ic_cmd = TUNNEWPPA;
1650     strioc_ppa.ic_timout = 0;
1651     strioc_ppa.ic_len = sizeof(ppa);
1652     strioc_ppa.ic_dp = (char *)&ppa;
1653     if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
1654        syslog (LOG_ERR, "Can't assign new interface");
1655
1656     TFR(if_fd = open("/dev/tap", O_RDWR, 0));
1657     if (if_fd < 0) {
1658        syslog(LOG_ERR, "Can't open /dev/tap (2)");
1659        return -1;
1660     }
1661     if(ioctl(if_fd, I_PUSH, "ip") < 0){
1662        syslog(LOG_ERR, "Can't push IP module");
1663        return -1;
1664     }
1665
1666     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
1667         syslog(LOG_ERR, "Can't get flags\n");
1668
1669     snprintf (actual_name, 32, "tap%d", ppa);
1670     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
1671
1672     ifr.lifr_ppa = ppa;
1673     /* Assign ppa according to the unit number returned by tun device */
1674
1675     if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
1676         syslog (LOG_ERR, "Can't set PPA %d", ppa);
1677     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
1678         syslog (LOG_ERR, "Can't get flags\n");
1679     /* Push arp module to if_fd */
1680     if (ioctl (if_fd, I_PUSH, "arp") < 0)
1681         syslog (LOG_ERR, "Can't push ARP module (2)");
1682
1683     /* Push arp module to ip_fd */
1684     if (ioctl (ip_fd, I_POP, NULL) < 0)
1685         syslog (LOG_ERR, "I_POP failed\n");
1686     if (ioctl (ip_fd, I_PUSH, "arp") < 0)
1687         syslog (LOG_ERR, "Can't push ARP module (3)\n");
1688     /* Open arp_fd */
1689     TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
1690     if (arp_fd < 0)
1691        syslog (LOG_ERR, "Can't open %s\n", "/dev/tap");
1692
1693     /* Set ifname to arp */
1694     strioc_if.ic_cmd = SIOCSLIFNAME;
1695     strioc_if.ic_timout = 0;
1696     strioc_if.ic_len = sizeof(ifr);
1697     strioc_if.ic_dp = (char *)&ifr;
1698     if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
1699         syslog (LOG_ERR, "Can't set ifname to arp\n");
1700     }
1701
1702     if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
1703        syslog(LOG_ERR, "Can't link TAP device to IP");
1704        return -1;
1705     }
1706
1707     if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
1708         syslog (LOG_ERR, "Can't link TAP device to ARP");
1709
1710     close (if_fd);
1711
1712     memset(&ifr, 0x0, sizeof(ifr));
1713     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
1714     ifr.lifr_ip_muxid  = ip_muxid;
1715     ifr.lifr_arp_muxid = arp_muxid;
1716
1717     if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
1718     {
1719       ioctl (ip_fd, I_PUNLINK , arp_muxid);
1720       ioctl (ip_fd, I_PUNLINK, ip_muxid);
1721       syslog (LOG_ERR, "Can't set multiplexor id");
1722     }
1723
1724     snprintf(dev, dev_size, "tap%d", ppa);
1725     return tap_fd;
1726 }
1727
1728 static int tap_open(char *ifname, int ifname_size, int *vnet_hdr)
1729 {
1730     char  dev[10]="";
1731     int fd;
1732     if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){
1733        fprintf(stderr, "Cannot allocate TAP device\n");
1734        return -1;
1735     }
1736     pstrcpy(ifname, ifname_size, dev);
1737     fcntl(fd, F_SETFL, O_NONBLOCK);
1738     return fd;
1739 }
1740 #elif defined (_AIX)
1741 static int tap_open(char *ifname, int ifname_size)
1742 {
1743     fprintf (stderr, "no tap on AIX\n");
1744     return -1;
1745 }
1746 #else
1747 static int tap_open(char *ifname, int ifname_size, int *vnet_hdr)
1748 {
1749     struct ifreq ifr;
1750     int fd, ret;
1751
1752     TFR(fd = open("/dev/net/tun", O_RDWR));
1753     if (fd < 0) {
1754         fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n");
1755         return -1;
1756     }
1757     memset(&ifr, 0, sizeof(ifr));
1758     ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
1759
1760 #if defined(TUNGETFEATURES) && defined(IFF_VNET_HDR)
1761     {
1762         unsigned int features;
1763
1764         if (ioctl(fd, TUNGETFEATURES, &features) == 0 &&
1765             features & IFF_VNET_HDR) {
1766             *vnet_hdr = 1;
1767             ifr.ifr_flags |= IFF_VNET_HDR;
1768         }
1769     }
1770 #endif
1771
1772     if (ifname[0] != '\0')
1773         pstrcpy(ifr.ifr_name, IFNAMSIZ, ifname);
1774     else
1775         pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d");
1776     ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
1777     if (ret != 0) {
1778         fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n");
1779         close(fd);
1780         return -1;
1781     }
1782     pstrcpy(ifname, ifname_size, ifr.ifr_name);
1783     fcntl(fd, F_SETFL, O_NONBLOCK);
1784     return fd;
1785 }
1786 #endif
1787
1788 static int launch_script(const char *setup_script, const char *ifname, int fd)
1789 {
1790     sigset_t oldmask, mask;
1791     int pid, status;
1792     char *args[3];
1793     char **parg;
1794
1795     sigemptyset(&mask);
1796     sigaddset(&mask, SIGCHLD);
1797     sigprocmask(SIG_BLOCK, &mask, &oldmask);
1798
1799     /* try to launch network script */
1800     pid = fork();
1801     if (pid == 0) {
1802         int open_max = sysconf(_SC_OPEN_MAX), i;
1803
1804         for (i = 0; i < open_max; i++) {
1805             if (i != STDIN_FILENO &&
1806                 i != STDOUT_FILENO &&
1807                 i != STDERR_FILENO &&
1808                 i != fd) {
1809                 close(i);
1810             }
1811         }
1812         parg = args;
1813         *parg++ = (char *)setup_script;
1814         *parg++ = (char *)ifname;
1815         *parg++ = NULL;
1816         execv(setup_script, args);
1817         _exit(1);
1818     } else if (pid > 0) {
1819         while (waitpid(pid, &status, 0) != pid) {
1820             /* loop */
1821         }
1822         sigprocmask(SIG_SETMASK, &oldmask, NULL);
1823
1824         if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
1825             return 0;
1826         }
1827     }
1828     fprintf(stderr, "%s: could not launch network script\n", setup_script);
1829     return -1;
1830 }
1831
1832 static TAPState *net_tap_init(VLANState *vlan, const char *model,
1833                               const char *name, const char *ifname1,
1834                               const char *setup_script, const char *down_script)
1835 {
1836     TAPState *s;
1837     int fd;
1838     int vnet_hdr;
1839     char ifname[128];
1840
1841     if (ifname1 != NULL)
1842         pstrcpy(ifname, sizeof(ifname), ifname1);
1843     else
1844         ifname[0] = '\0';
1845     vnet_hdr = 0;
1846     TFR(fd = tap_open(ifname, sizeof(ifname), &vnet_hdr));
1847     if (fd < 0)
1848         return NULL;
1849
1850     if (!setup_script || !strcmp(setup_script, "no"))
1851         setup_script = "";
1852     if (setup_script[0] != '\0' &&
1853         launch_script(setup_script, ifname, fd)) {
1854         return NULL;
1855     }
1856     s = net_tap_fd_init(vlan, model, name, fd, vnet_hdr);
1857     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1858              "ifname=%s,script=%s,downscript=%s",
1859              ifname, setup_script, down_script);
1860     if (down_script && strcmp(down_script, "no")) {
1861         snprintf(s->down_script, sizeof(s->down_script), "%s", down_script);
1862         snprintf(s->down_script_arg, sizeof(s->down_script_arg), "%s", ifname);
1863     }
1864     return s;
1865 }
1866
1867 #endif /* !_WIN32 */
1868
1869 #if defined(CONFIG_VDE)
1870 typedef struct VDEState {
1871     VLANClientState *vc;
1872     VDECONN *vde;
1873 } VDEState;
1874
1875 static void vde_to_qemu(void *opaque)
1876 {
1877     VDEState *s = opaque;
1878     uint8_t buf[4096];
1879     int size;
1880
1881     size = vde_recv(s->vde, (char *)buf, sizeof(buf), 0);
1882     if (size > 0) {
1883         qemu_send_packet(s->vc, buf, size);
1884     }
1885 }
1886
1887 static ssize_t vde_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1888 {
1889     VDEState *s = vc->opaque;
1890     ssize_t ret;
1891
1892     do {
1893       ret = vde_send(s->vde, (const char *)buf, size, 0);
1894     } while (ret < 0 && errno == EINTR);
1895
1896     return ret;
1897 }
1898
1899 static void vde_cleanup(VLANClientState *vc)
1900 {
1901     VDEState *s = vc->opaque;
1902     qemu_set_fd_handler(vde_datafd(s->vde), NULL, NULL, NULL);
1903     vde_close(s->vde);
1904     qemu_free(s);
1905 }
1906
1907 static int net_vde_init(VLANState *vlan, const char *model,
1908                         const char *name, const char *sock,
1909                         int port, const char *group, int mode)
1910 {
1911     VDEState *s;
1912     char *init_group = strlen(group) ? (char *)group : NULL;
1913     char *init_sock = strlen(sock) ? (char *)sock : NULL;
1914
1915     struct vde_open_args args = {
1916         .port = port,
1917         .group = init_group,
1918         .mode = mode,
1919     };
1920
1921     s = qemu_mallocz(sizeof(VDEState));
1922     s->vde = vde_open(init_sock, (char *)"QEMU", &args);
1923     if (!s->vde){
1924         free(s);
1925         return -1;
1926     }
1927     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, vde_receive,
1928                                  NULL, vde_cleanup, s);
1929     qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
1930     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "sock=%s,fd=%d",
1931              sock, vde_datafd(s->vde));
1932     return 0;
1933 }
1934 #endif
1935
1936 /* network connection */
1937 typedef struct NetSocketState {
1938     VLANClientState *vc;
1939     int fd;
1940     int state; /* 0 = getting length, 1 = getting data */
1941     unsigned int index;
1942     unsigned int packet_len;
1943     uint8_t buf[4096];
1944     struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
1945 } NetSocketState;
1946
1947 typedef struct NetSocketListenState {
1948     VLANState *vlan;
1949     char *model;
1950     char *name;
1951     int fd;
1952 } NetSocketListenState;
1953
1954 /* XXX: we consider we can send the whole packet without blocking */
1955 static ssize_t net_socket_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1956 {
1957     NetSocketState *s = vc->opaque;
1958     uint32_t len;
1959     len = htonl(size);
1960
1961     send_all(s->fd, (const uint8_t *)&len, sizeof(len));
1962     return send_all(s->fd, buf, size);
1963 }
1964
1965 static ssize_t net_socket_receive_dgram(VLANClientState *vc, const uint8_t *buf, size_t size)
1966 {
1967     NetSocketState *s = vc->opaque;
1968
1969     return sendto(s->fd, (const void *)buf, size, 0,
1970                   (struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst));
1971 }
1972
1973 static void net_socket_send(void *opaque)
1974 {
1975     NetSocketState *s = opaque;
1976     int size, err;
1977     unsigned l;
1978     uint8_t buf1[4096];
1979     const uint8_t *buf;
1980
1981     size = recv(s->fd, (void *)buf1, sizeof(buf1), 0);
1982     if (size < 0) {
1983         err = socket_error();
1984         if (err != EWOULDBLOCK)
1985             goto eoc;
1986     } else if (size == 0) {
1987         /* end of connection */
1988     eoc:
1989         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1990         closesocket(s->fd);
1991         return;
1992     }
1993     buf = buf1;
1994     while (size > 0) {
1995         /* reassemble a packet from the network */
1996         switch(s->state) {
1997         case 0:
1998             l = 4 - s->index;
1999             if (l > size)
2000                 l = size;
2001             memcpy(s->buf + s->index, buf, l);
2002             buf += l;
2003             size -= l;
2004             s->index += l;
2005             if (s->index == 4) {
2006                 /* got length */
2007                 s->packet_len = ntohl(*(uint32_t *)s->buf);
2008                 s->index = 0;
2009                 s->state = 1;
2010             }
2011             break;
2012         case 1:
2013             l = s->packet_len - s->index;
2014             if (l > size)
2015                 l = size;
2016             if (s->index + l <= sizeof(s->buf)) {
2017                 memcpy(s->buf + s->index, buf, l);
2018             } else {
2019                 fprintf(stderr, "serious error: oversized packet received,"
2020                     "connection terminated.\n");
2021                 s->state = 0;
2022                 goto eoc;
2023             }
2024
2025             s->index += l;
2026             buf += l;
2027             size -= l;
2028             if (s->index >= s->packet_len) {
2029                 qemu_send_packet(s->vc, s->buf, s->packet_len);
2030                 s->index = 0;
2031                 s->state = 0;
2032             }
2033             break;
2034         }
2035     }
2036 }
2037
2038 static void net_socket_send_dgram(void *opaque)
2039 {
2040     NetSocketState *s = opaque;
2041     int size;
2042
2043     size = recv(s->fd, (void *)s->buf, sizeof(s->buf), 0);
2044     if (size < 0)
2045         return;
2046     if (size == 0) {
2047         /* end of connection */
2048         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
2049         return;
2050     }
2051     qemu_send_packet(s->vc, s->buf, size);
2052 }
2053
2054 static int net_socket_mcast_create(struct sockaddr_in *mcastaddr)
2055 {
2056     struct ip_mreq imr;
2057     int fd;
2058     int val, ret;
2059     if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
2060         fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n",
2061                 inet_ntoa(mcastaddr->sin_addr),
2062                 (int)ntohl(mcastaddr->sin_addr.s_addr));
2063         return -1;
2064
2065     }
2066     fd = socket(PF_INET, SOCK_DGRAM, 0);
2067     if (fd < 0) {
2068         perror("socket(PF_INET, SOCK_DGRAM)");
2069         return -1;
2070     }
2071
2072     val = 1;
2073     ret=setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
2074                    (const char *)&val, sizeof(val));
2075     if (ret < 0) {
2076         perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
2077         goto fail;
2078     }
2079
2080     ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
2081     if (ret < 0) {
2082         perror("bind");
2083         goto fail;
2084     }
2085
2086     /* Add host to multicast group */
2087     imr.imr_multiaddr = mcastaddr->sin_addr;
2088     imr.imr_interface.s_addr = htonl(INADDR_ANY);
2089
2090     ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
2091                      (const char *)&imr, sizeof(struct ip_mreq));
2092     if (ret < 0) {
2093         perror("setsockopt(IP_ADD_MEMBERSHIP)");
2094         goto fail;
2095     }
2096
2097     /* Force mcast msgs to loopback (eg. several QEMUs in same host */
2098     val = 1;
2099     ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
2100                    (const char *)&val, sizeof(val));
2101     if (ret < 0) {
2102         perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
2103         goto fail;
2104     }
2105
2106     socket_set_nonblock(fd);
2107     return fd;
2108 fail:
2109     if (fd >= 0)
2110         closesocket(fd);
2111     return -1;
2112 }
2113
2114 static void net_socket_cleanup(VLANClientState *vc)
2115 {
2116     NetSocketState *s = vc->opaque;
2117     qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
2118     close(s->fd);
2119     qemu_free(s);
2120 }
2121
2122 static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
2123                                                 const char *model,
2124                                                 const char *name,
2125                                                 int fd, int is_connected)
2126 {
2127     struct sockaddr_in saddr;
2128     int newfd;
2129     socklen_t saddr_len;
2130     NetSocketState *s;
2131
2132     /* fd passed: multicast: "learn" dgram_dst address from bound address and save it
2133      * Because this may be "shared" socket from a "master" process, datagrams would be recv()
2134      * by ONLY ONE process: we must "clone" this dgram socket --jjo
2135      */
2136
2137     if (is_connected) {
2138         if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
2139             /* must be bound */
2140             if (saddr.sin_addr.s_addr==0) {
2141                 fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, cannot setup multicast dst addr\n",
2142                         fd);
2143                 return NULL;
2144             }
2145             /* clone dgram socket */
2146             newfd = net_socket_mcast_create(&saddr);
2147             if (newfd < 0) {
2148                 /* error already reported by net_socket_mcast_create() */
2149                 close(fd);
2150                 return NULL;
2151             }
2152             /* clone newfd to fd, close newfd */
2153             dup2(newfd, fd);
2154             close(newfd);
2155
2156         } else {
2157             fprintf(stderr, "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
2158                     fd, strerror(errno));
2159             return NULL;
2160         }
2161     }
2162
2163     s = qemu_mallocz(sizeof(NetSocketState));
2164     s->fd = fd;
2165
2166     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, net_socket_receive_dgram,
2167                                  NULL, net_socket_cleanup, s);
2168     qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s);
2169
2170     /* mcast: save bound address as dst */
2171     if (is_connected) s->dgram_dst=saddr;
2172
2173     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2174             "socket: fd=%d (%s mcast=%s:%d)",
2175             fd, is_connected? "cloned" : "",
2176             inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2177     return s;
2178 }
2179
2180 static void net_socket_connect(void *opaque)
2181 {
2182     NetSocketState *s = opaque;
2183     qemu_set_fd_handler(s->fd, net_socket_send, NULL, s);
2184 }
2185
2186 static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
2187                                                  const char *model,
2188                                                  const char *name,
2189                                                  int fd, int is_connected)
2190 {
2191     NetSocketState *s;
2192     s = qemu_mallocz(sizeof(NetSocketState));
2193     s->fd = fd;
2194     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, net_socket_receive,
2195                                  NULL, net_socket_cleanup, s);
2196     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2197              "socket: fd=%d", fd);
2198     if (is_connected) {
2199         net_socket_connect(s);
2200     } else {
2201         qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
2202     }
2203     return s;
2204 }
2205
2206 static NetSocketState *net_socket_fd_init(VLANState *vlan,
2207                                           const char *model, const char *name,
2208                                           int fd, int is_connected)
2209 {
2210     int so_type=-1, optlen=sizeof(so_type);
2211
2212     if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type,
2213         (socklen_t *)&optlen)< 0) {
2214         fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n", fd);
2215         return NULL;
2216     }
2217     switch(so_type) {
2218     case SOCK_DGRAM:
2219         return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected);
2220     case SOCK_STREAM:
2221         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
2222     default:
2223         /* who knows ... this could be a eg. a pty, do warn and continue as stream */
2224         fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
2225         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
2226     }
2227     return NULL;
2228 }
2229
2230 static void net_socket_accept(void *opaque)
2231 {
2232     NetSocketListenState *s = opaque;
2233     NetSocketState *s1;
2234     struct sockaddr_in saddr;
2235     socklen_t len;
2236     int fd;
2237
2238     for(;;) {
2239         len = sizeof(saddr);
2240         fd = accept(s->fd, (struct sockaddr *)&saddr, &len);
2241         if (fd < 0 && errno != EINTR) {
2242             return;
2243         } else if (fd >= 0) {
2244             break;
2245         }
2246     }
2247     s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1);
2248     if (!s1) {
2249         closesocket(fd);
2250     } else {
2251         snprintf(s1->vc->info_str, sizeof(s1->vc->info_str),
2252                  "socket: connection from %s:%d",
2253                  inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2254     }
2255 }
2256
2257 static int net_socket_listen_init(VLANState *vlan,
2258                                   const char *model,
2259                                   const char *name,
2260                                   const char *host_str)
2261 {
2262     NetSocketListenState *s;
2263     int fd, val, ret;
2264     struct sockaddr_in saddr;
2265
2266     if (parse_host_port(&saddr, host_str) < 0)
2267         return -1;
2268
2269     s = qemu_mallocz(sizeof(NetSocketListenState));
2270
2271     fd = socket(PF_INET, SOCK_STREAM, 0);
2272     if (fd < 0) {
2273         perror("socket");
2274         return -1;
2275     }
2276     socket_set_nonblock(fd);
2277
2278     /* allow fast reuse */
2279     val = 1;
2280     setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));
2281
2282     ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
2283     if (ret < 0) {
2284         perror("bind");
2285         return -1;
2286     }
2287     ret = listen(fd, 0);
2288     if (ret < 0) {
2289         perror("listen");
2290         return -1;
2291     }
2292     s->vlan = vlan;
2293     s->model = strdup(model);
2294     s->name = name ? strdup(name) : NULL;
2295     s->fd = fd;
2296     qemu_set_fd_handler(fd, net_socket_accept, NULL, s);
2297     return 0;
2298 }
2299
2300 static int net_socket_connect_init(VLANState *vlan,
2301                                    const char *model,
2302                                    const char *name,
2303                                    const char *host_str)
2304 {
2305     NetSocketState *s;
2306     int fd, connected, ret, err;
2307     struct sockaddr_in saddr;
2308
2309     if (parse_host_port(&saddr, host_str) < 0)
2310         return -1;
2311
2312     fd = socket(PF_INET, SOCK_STREAM, 0);
2313     if (fd < 0) {
2314         perror("socket");
2315         return -1;
2316     }
2317     socket_set_nonblock(fd);
2318
2319     connected = 0;
2320     for(;;) {
2321         ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
2322         if (ret < 0) {
2323             err = socket_error();
2324             if (err == EINTR || err == EWOULDBLOCK) {
2325             } else if (err == EINPROGRESS) {
2326                 break;
2327 #ifdef _WIN32
2328             } else if (err == WSAEALREADY) {
2329                 break;
2330 #endif
2331             } else {
2332                 perror("connect");
2333                 closesocket(fd);
2334                 return -1;
2335             }
2336         } else {
2337             connected = 1;
2338             break;
2339         }
2340     }
2341     s = net_socket_fd_init(vlan, model, name, fd, connected);
2342     if (!s)
2343         return -1;
2344     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2345              "socket: connect to %s:%d",
2346              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2347     return 0;
2348 }
2349
2350 static int net_socket_mcast_init(VLANState *vlan,
2351                                  const char *model,
2352                                  const char *name,
2353                                  const char *host_str)
2354 {
2355     NetSocketState *s;
2356     int fd;
2357     struct sockaddr_in saddr;
2358
2359     if (parse_host_port(&saddr, host_str) < 0)
2360         return -1;
2361
2362
2363     fd = net_socket_mcast_create(&saddr);
2364     if (fd < 0)
2365         return -1;
2366
2367     s = net_socket_fd_init(vlan, model, name, fd, 0);
2368     if (!s)
2369         return -1;
2370
2371     s->dgram_dst = saddr;
2372
2373     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2374              "socket: mcast=%s:%d",
2375              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2376     return 0;
2377
2378 }
2379
2380 typedef struct DumpState {
2381     VLANClientState *pcap_vc;
2382     int fd;
2383     int pcap_caplen;
2384 } DumpState;
2385
2386 #define PCAP_MAGIC 0xa1b2c3d4
2387
2388 struct pcap_file_hdr {
2389     uint32_t magic;
2390     uint16_t version_major;
2391     uint16_t version_minor;
2392     int32_t thiszone;
2393     uint32_t sigfigs;
2394     uint32_t snaplen;
2395     uint32_t linktype;
2396 };
2397
2398 struct pcap_sf_pkthdr {
2399     struct {
2400         int32_t tv_sec;
2401         int32_t tv_usec;
2402     } ts;
2403     uint32_t caplen;
2404     uint32_t len;
2405 };
2406
2407 static ssize_t dump_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
2408 {
2409     DumpState *s = vc->opaque;
2410     struct pcap_sf_pkthdr hdr;
2411     int64_t ts;
2412     int caplen;
2413
2414     /* Early return in case of previous error. */
2415     if (s->fd < 0) {
2416         return size;
2417     }
2418
2419     ts = muldiv64(qemu_get_clock(vm_clock), 1000000, ticks_per_sec);
2420     caplen = size > s->pcap_caplen ? s->pcap_caplen : size;
2421
2422     hdr.ts.tv_sec = ts / 1000000;
2423     hdr.ts.tv_usec = ts % 1000000;
2424     hdr.caplen = caplen;
2425     hdr.len = size;
2426     if (write(s->fd, &hdr, sizeof(hdr)) != sizeof(hdr) ||
2427         write(s->fd, buf, caplen) != caplen) {
2428         qemu_log("-net dump write error - stop dump\n");
2429         close(s->fd);
2430         s->fd = -1;
2431     }
2432
2433     return size;
2434 }
2435
2436 static void net_dump_cleanup(VLANClientState *vc)
2437 {
2438     DumpState *s = vc->opaque;
2439
2440     close(s->fd);
2441     qemu_free(s);
2442 }
2443
2444 static int net_dump_init(Monitor *mon, VLANState *vlan, const char *device,
2445                          const char *name, const char *filename, int len)
2446 {
2447     struct pcap_file_hdr hdr;
2448     DumpState *s;
2449
2450     s = qemu_malloc(sizeof(DumpState));
2451
2452     s->fd = open(filename, O_CREAT | O_WRONLY | O_BINARY, 0644);
2453     if (s->fd < 0) {
2454         config_error(mon, "-net dump: can't open %s\n", filename);
2455         return -1;
2456     }
2457
2458     s->pcap_caplen = len;
2459
2460     hdr.magic = PCAP_MAGIC;
2461     hdr.version_major = 2;
2462     hdr.version_minor = 4;
2463     hdr.thiszone = 0;
2464     hdr.sigfigs = 0;
2465     hdr.snaplen = s->pcap_caplen;
2466     hdr.linktype = 1;
2467
2468     if (write(s->fd, &hdr, sizeof(hdr)) < sizeof(hdr)) {
2469         config_error(mon, "-net dump write error: %s\n", strerror(errno));
2470         close(s->fd);
2471         qemu_free(s);
2472         return -1;
2473     }
2474
2475     s->pcap_vc = qemu_new_vlan_client(vlan, device, name, NULL, dump_receive, NULL,
2476                                       net_dump_cleanup, s);
2477     snprintf(s->pcap_vc->info_str, sizeof(s->pcap_vc->info_str),
2478              "dump to %s (len=%d)", filename, len);
2479     return 0;
2480 }
2481
2482 /* find or alloc a new VLAN */
2483 VLANState *qemu_find_vlan(int id, int allocate)
2484 {
2485     VLANState **pvlan, *vlan;
2486     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2487         if (vlan->id == id)
2488             return vlan;
2489     }
2490     if (!allocate) {
2491         return NULL;
2492     }
2493     vlan = qemu_mallocz(sizeof(VLANState));
2494     vlan->id = id;
2495     vlan->next = NULL;
2496     pvlan = &first_vlan;
2497     while (*pvlan != NULL)
2498         pvlan = &(*pvlan)->next;
2499     *pvlan = vlan;
2500     return vlan;
2501 }
2502
2503 static int nic_get_free_idx(void)
2504 {
2505     int index;
2506
2507     for (index = 0; index < MAX_NICS; index++)
2508         if (!nd_table[index].used)
2509             return index;
2510     return -1;
2511 }
2512
2513 void qemu_check_nic_model(NICInfo *nd, const char *model)
2514 {
2515     const char *models[2];
2516
2517     models[0] = model;
2518     models[1] = NULL;
2519
2520     qemu_check_nic_model_list(nd, models, model);
2521 }
2522
2523 void qemu_check_nic_model_list(NICInfo *nd, const char * const *models,
2524                                const char *default_model)
2525 {
2526     int i, exit_status = 0;
2527
2528     if (!nd->model)
2529         nd->model = strdup(default_model);
2530
2531     if (strcmp(nd->model, "?") != 0) {
2532         for (i = 0 ; models[i]; i++)
2533             if (strcmp(nd->model, models[i]) == 0)
2534                 return;
2535
2536         fprintf(stderr, "qemu: Unsupported NIC model: %s\n", nd->model);
2537         exit_status = 1;
2538     }
2539
2540     fprintf(stderr, "qemu: Supported NIC models: ");
2541     for (i = 0 ; models[i]; i++)
2542         fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
2543
2544     exit(exit_status);
2545 }
2546
2547 int net_client_init(Monitor *mon, const char *device, const char *p)
2548 {
2549     char buf[1024];
2550     int vlan_id, ret;
2551     VLANState *vlan;
2552     char *name = NULL;
2553
2554     vlan_id = 0;
2555     if (get_param_value(buf, sizeof(buf), "vlan", p)) {
2556         vlan_id = strtol(buf, NULL, 0);
2557     }
2558     vlan = qemu_find_vlan(vlan_id, 1);
2559
2560     if (get_param_value(buf, sizeof(buf), "name", p)) {
2561         name = qemu_strdup(buf);
2562     }
2563     if (!strcmp(device, "nic")) {
2564         static const char * const nic_params[] = {
2565             "vlan", "name", "macaddr", "model", "addr", "vectors", NULL
2566         };
2567         NICInfo *nd;
2568         uint8_t *macaddr;
2569         int idx = nic_get_free_idx();
2570
2571         if (check_params(buf, sizeof(buf), nic_params, p) < 0) {
2572             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2573             ret = -1;
2574             goto out;
2575         }
2576         if (idx == -1 || nb_nics >= MAX_NICS) {
2577             config_error(mon, "Too Many NICs\n");
2578             ret = -1;
2579             goto out;
2580         }
2581         nd = &nd_table[idx];
2582         macaddr = nd->macaddr;
2583         macaddr[0] = 0x52;
2584         macaddr[1] = 0x54;
2585         macaddr[2] = 0x00;
2586         macaddr[3] = 0x12;
2587         macaddr[4] = 0x34;
2588         macaddr[5] = 0x56 + idx;
2589
2590         if (get_param_value(buf, sizeof(buf), "macaddr", p)) {
2591             if (parse_macaddr(macaddr, buf) < 0) {
2592                 config_error(mon, "invalid syntax for ethernet address\n");
2593                 ret = -1;
2594                 goto out;
2595             }
2596         }
2597         if (get_param_value(buf, sizeof(buf), "model", p)) {
2598             nd->model = strdup(buf);
2599         }
2600         if (get_param_value(buf, sizeof(buf), "addr", p)) {
2601             nd->devaddr = strdup(buf);
2602         }
2603         nd->nvectors = NIC_NVECTORS_UNSPECIFIED;
2604         if (get_param_value(buf, sizeof(buf), "vectors", p)) {
2605             char *endptr;
2606             long vectors = strtol(buf, &endptr, 0);
2607             if (*endptr) {
2608                 config_error(mon, "invalid syntax for # of vectors\n");
2609                 ret = -1;
2610                 goto out;
2611             }
2612             if (vectors < 0 || vectors > 0x7ffffff) {
2613                 config_error(mon, "invalid # of vectors\n");
2614                 ret = -1;
2615                 goto out;
2616             }
2617             nd->nvectors = vectors;
2618         }
2619         nd->vlan = vlan;
2620         nd->name = name;
2621         nd->used = 1;
2622         name = NULL;
2623         nb_nics++;
2624         vlan->nb_guest_devs++;
2625         ret = idx;
2626     } else
2627     if (!strcmp(device, "none")) {
2628         if (*p != '\0') {
2629             config_error(mon, "'none' takes no parameters\n");
2630             ret = -1;
2631             goto out;
2632         }
2633         /* does nothing. It is needed to signal that no network cards
2634            are wanted */
2635         ret = 0;
2636     } else
2637 #ifdef CONFIG_SLIRP
2638     if (!strcmp(device, "user")) {
2639         static const char * const slirp_params[] = {
2640             "vlan", "name", "hostname", "restrict", "ip", "net", "host",
2641             "tftp", "bootfile", "dhcpstart", "dns", "smb", "smbserver",
2642             "hostfwd", "guestfwd", NULL
2643         };
2644         struct slirp_config_str *config;
2645         int restricted = 0;
2646         char *vnet = NULL;
2647         char *vhost = NULL;
2648         char *vhostname = NULL;
2649         char *tftp_export = NULL;
2650         char *bootfile = NULL;
2651         char *vdhcp_start = NULL;
2652         char *vnamesrv = NULL;
2653         char *smb_export = NULL;
2654         char *vsmbsrv = NULL;
2655         const char *q;
2656
2657         if (check_params(buf, sizeof(buf), slirp_params, p) < 0) {
2658             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2659             ret = -1;
2660             goto out;
2661         }
2662         if (get_param_value(buf, sizeof(buf), "ip", p)) {
2663             /* emulate legacy parameter */
2664             vnet = qemu_malloc(strlen(buf) + strlen("/24") + 1);
2665             strcpy(vnet, buf);
2666             strcat(vnet, "/24");
2667         }
2668         if (get_param_value(buf, sizeof(buf), "net", p)) {
2669             vnet = qemu_strdup(buf);
2670         }
2671         if (get_param_value(buf, sizeof(buf), "host", p)) {
2672             vhost = qemu_strdup(buf);
2673         }
2674         if (get_param_value(buf, sizeof(buf), "hostname", p)) {
2675             vhostname = qemu_strdup(buf);
2676         }
2677         if (get_param_value(buf, sizeof(buf), "restrict", p)) {
2678             restricted = (buf[0] == 'y') ? 1 : 0;
2679         }
2680         if (get_param_value(buf, sizeof(buf), "dhcpstart", p)) {
2681             vdhcp_start = qemu_strdup(buf);
2682         }
2683         if (get_param_value(buf, sizeof(buf), "dns", p)) {
2684             vnamesrv = qemu_strdup(buf);
2685         }
2686         if (get_param_value(buf, sizeof(buf), "tftp", p)) {
2687             tftp_export = qemu_strdup(buf);
2688         }
2689         if (get_param_value(buf, sizeof(buf), "bootfile", p)) {
2690             bootfile = qemu_strdup(buf);
2691         }
2692         if (get_param_value(buf, sizeof(buf), "smb", p)) {
2693             smb_export = qemu_strdup(buf);
2694             if (get_param_value(buf, sizeof(buf), "smbserver", p)) {
2695                 vsmbsrv = qemu_strdup(buf);
2696             }
2697         }
2698         q = p;
2699         while (1) {
2700             config = qemu_malloc(sizeof(*config));
2701             if (!get_next_param_value(config->str, sizeof(config->str),
2702                                       "hostfwd", &q)) {
2703                 break;
2704             }
2705             config->flags = SLIRP_CFG_HOSTFWD;
2706             config->next = slirp_configs;
2707             slirp_configs = config;
2708             config = NULL;
2709         }
2710         q = p;
2711         while (1) {
2712             config = qemu_malloc(sizeof(*config));
2713             if (!get_next_param_value(config->str, sizeof(config->str),
2714                                       "guestfwd", &q)) {
2715                 break;
2716             }
2717             config->flags = 0;
2718             config->next = slirp_configs;
2719             slirp_configs = config;
2720             config = NULL;
2721         }
2722         qemu_free(config);
2723         vlan->nb_host_devs++;
2724         ret = net_slirp_init(mon, vlan, device, name, restricted, vnet, vhost,
2725                              vhostname, tftp_export, bootfile, vdhcp_start,
2726                              vnamesrv, smb_export, vsmbsrv);
2727         qemu_free(vnet);
2728         qemu_free(vhost);
2729         qemu_free(vhostname);
2730         qemu_free(tftp_export);
2731         qemu_free(bootfile);
2732         qemu_free(vdhcp_start);
2733         qemu_free(vnamesrv);
2734         qemu_free(smb_export);
2735         qemu_free(vsmbsrv);
2736     } else if (!strcmp(device, "channel")) {
2737         if (TAILQ_EMPTY(&slirp_stacks)) {
2738             struct slirp_config_str *config;
2739
2740             config = qemu_malloc(sizeof(*config));
2741             pstrcpy(config->str, sizeof(config->str), p);
2742             config->flags = SLIRP_CFG_LEGACY;
2743             config->next = slirp_configs;
2744             slirp_configs = config;
2745         } else {
2746             slirp_guestfwd(TAILQ_FIRST(&slirp_stacks), mon, p, 1);
2747         }
2748         ret = 0;
2749     } else
2750 #endif
2751 #ifdef _WIN32
2752     if (!strcmp(device, "tap")) {
2753         static const char * const tap_params[] = {
2754             "vlan", "name", "ifname", NULL
2755         };
2756         char ifname[64];
2757
2758         if (check_params(buf, sizeof(buf), tap_params, p) < 0) {
2759             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2760             ret = -1;
2761             goto out;
2762         }
2763         if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
2764             config_error(mon, "tap: no interface name\n");
2765             ret = -1;
2766             goto out;
2767         }
2768         vlan->nb_host_devs++;
2769         ret = tap_win32_init(vlan, device, name, ifname);
2770     } else
2771 #elif defined (_AIX)
2772 #else
2773     if (!strcmp(device, "tap")) {
2774         char ifname[64], chkbuf[64];
2775         char setup_script[1024], down_script[1024];
2776         TAPState *s;
2777         int fd;
2778         vlan->nb_host_devs++;
2779         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
2780             static const char * const fd_params[] = {
2781                 "vlan", "name", "fd", "sndbuf", NULL
2782             };
2783             if (check_params(chkbuf, sizeof(chkbuf), fd_params, p) < 0) {
2784                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2785                 ret = -1;
2786                 goto out;
2787             }
2788             fd = strtol(buf, NULL, 0);
2789             fcntl(fd, F_SETFL, O_NONBLOCK);
2790             s = net_tap_fd_init(vlan, device, name, fd, tap_probe_vnet_hdr(fd));
2791         } else {
2792             static const char * const tap_params[] = {
2793                 "vlan", "name", "ifname", "script", "downscript", "sndbuf", NULL
2794             };
2795             if (check_params(chkbuf, sizeof(chkbuf), tap_params, p) < 0) {
2796                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2797                 ret = -1;
2798                 goto out;
2799             }
2800             if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
2801                 ifname[0] = '\0';
2802             }
2803             if (get_param_value(setup_script, sizeof(setup_script), "script", p) == 0) {
2804                 pstrcpy(setup_script, sizeof(setup_script), DEFAULT_NETWORK_SCRIPT);
2805             }
2806             if (get_param_value(down_script, sizeof(down_script), "downscript", p) == 0) {
2807                 pstrcpy(down_script, sizeof(down_script), DEFAULT_NETWORK_DOWN_SCRIPT);
2808             }
2809             s = net_tap_init(vlan, device, name, ifname, setup_script, down_script);
2810         }
2811         if (s != NULL) {
2812             if (get_param_value(buf, sizeof(buf), "sndbuf", p)) {
2813                 tap_set_sndbuf(s, atoi(buf), mon);
2814             }
2815             ret = 0;
2816         } else {
2817             ret = -1;
2818         }
2819     } else
2820 #endif
2821     if (!strcmp(device, "socket")) {
2822         char chkbuf[64];
2823         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
2824             static const char * const fd_params[] = {
2825                 "vlan", "name", "fd", NULL
2826             };
2827             int fd;
2828             if (check_params(chkbuf, sizeof(chkbuf), fd_params, p) < 0) {
2829                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2830                 ret = -1;
2831                 goto out;
2832             }
2833             fd = strtol(buf, NULL, 0);
2834             ret = -1;
2835             if (net_socket_fd_init(vlan, device, name, fd, 1))
2836                 ret = 0;
2837         } else if (get_param_value(buf, sizeof(buf), "listen", p) > 0) {
2838             static const char * const listen_params[] = {
2839                 "vlan", "name", "listen", NULL
2840             };
2841             if (check_params(chkbuf, sizeof(chkbuf), listen_params, p) < 0) {
2842                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2843                 ret = -1;
2844                 goto out;
2845             }
2846             ret = net_socket_listen_init(vlan, device, name, buf);
2847         } else if (get_param_value(buf, sizeof(buf), "connect", p) > 0) {
2848             static const char * const connect_params[] = {
2849                 "vlan", "name", "connect", NULL
2850             };
2851             if (check_params(chkbuf, sizeof(chkbuf), connect_params, p) < 0) {
2852                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2853                 ret = -1;
2854                 goto out;
2855             }
2856             ret = net_socket_connect_init(vlan, device, name, buf);
2857         } else if (get_param_value(buf, sizeof(buf), "mcast", p) > 0) {
2858             static const char * const mcast_params[] = {
2859                 "vlan", "name", "mcast", NULL
2860             };
2861             if (check_params(chkbuf, sizeof(chkbuf), mcast_params, p) < 0) {
2862                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2863                 ret = -1;
2864                 goto out;
2865             }
2866             ret = net_socket_mcast_init(vlan, device, name, buf);
2867         } else {
2868             config_error(mon, "Unknown socket options: %s\n", p);
2869             ret = -1;
2870             goto out;
2871         }
2872         vlan->nb_host_devs++;
2873     } else
2874 #ifdef CONFIG_VDE
2875     if (!strcmp(device, "vde")) {
2876         static const char * const vde_params[] = {
2877             "vlan", "name", "sock", "port", "group", "mode", NULL
2878         };
2879         char vde_sock[1024], vde_group[512];
2880         int vde_port, vde_mode;
2881
2882         if (check_params(buf, sizeof(buf), vde_params, p) < 0) {
2883             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2884             ret = -1;
2885             goto out;
2886         }
2887         vlan->nb_host_devs++;
2888         if (get_param_value(vde_sock, sizeof(vde_sock), "sock", p) <= 0) {
2889             vde_sock[0] = '\0';
2890         }
2891         if (get_param_value(buf, sizeof(buf), "port", p) > 0) {
2892             vde_port = strtol(buf, NULL, 10);
2893         } else {
2894             vde_port = 0;
2895         }
2896         if (get_param_value(vde_group, sizeof(vde_group), "group", p) <= 0) {
2897             vde_group[0] = '\0';
2898         }
2899         if (get_param_value(buf, sizeof(buf), "mode", p) > 0) {
2900             vde_mode = strtol(buf, NULL, 8);
2901         } else {
2902             vde_mode = 0700;
2903         }
2904         ret = net_vde_init(vlan, device, name, vde_sock, vde_port, vde_group, vde_mode);
2905     } else
2906 #endif
2907     if (!strcmp(device, "dump")) {
2908         int len = 65536;
2909
2910         if (get_param_value(buf, sizeof(buf), "len", p) > 0) {
2911             len = strtol(buf, NULL, 0);
2912         }
2913         if (!get_param_value(buf, sizeof(buf), "file", p)) {
2914             snprintf(buf, sizeof(buf), "qemu-vlan%d.pcap", vlan_id);
2915         }
2916         ret = net_dump_init(mon, vlan, device, name, buf, len);
2917     } else {
2918         config_error(mon, "Unknown network device: %s\n", device);
2919         ret = -1;
2920         goto out;
2921     }
2922     if (ret < 0) {
2923         config_error(mon, "Could not initialize device '%s'\n", device);
2924     }
2925 out:
2926     qemu_free(name);
2927     return ret;
2928 }
2929
2930 void net_client_uninit(NICInfo *nd)
2931 {
2932     nd->vlan->nb_guest_devs--;
2933     nb_nics--;
2934     nd->used = 0;
2935     free((void *)nd->model);
2936 }
2937
2938 static int net_host_check_device(const char *device)
2939 {
2940     int i;
2941     const char *valid_param_list[] = { "tap", "socket", "dump"
2942 #ifdef CONFIG_SLIRP
2943                                        ,"user"
2944 #endif
2945 #ifdef CONFIG_VDE
2946                                        ,"vde"
2947 #endif
2948     };
2949     for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) {
2950         if (!strncmp(valid_param_list[i], device,
2951                      strlen(valid_param_list[i])))
2952             return 1;
2953     }
2954
2955     return 0;
2956 }
2957
2958 void net_host_device_add(Monitor *mon, const char *device, const char *opts)
2959 {
2960     if (!net_host_check_device(device)) {
2961         monitor_printf(mon, "invalid host network device %s\n", device);
2962         return;
2963     }
2964     if (net_client_init(mon, device, opts ? opts : "") < 0) {
2965         monitor_printf(mon, "adding host network device %s failed\n", device);
2966     }
2967 }
2968
2969 void net_host_device_remove(Monitor *mon, int vlan_id, const char *device)
2970 {
2971     VLANClientState *vc;
2972
2973     vc = qemu_find_vlan_client_by_name(mon, vlan_id, device);
2974     if (!vc) {
2975         return;
2976     }
2977     if (!net_host_check_device(vc->model)) {
2978         monitor_printf(mon, "invalid host network device %s\n", device);
2979         return;
2980     }
2981     qemu_del_vlan_client(vc);
2982 }
2983
2984 int net_client_parse(const char *str)
2985 {
2986     const char *p;
2987     char *q;
2988     char device[64];
2989
2990     p = str;
2991     q = device;
2992     while (*p != '\0' && *p != ',') {
2993         if ((q - device) < sizeof(device) - 1)
2994             *q++ = *p;
2995         p++;
2996     }
2997     *q = '\0';
2998     if (*p == ',')
2999         p++;
3000
3001     return net_client_init(NULL, device, p);
3002 }
3003
3004 void net_set_boot_mask(int net_boot_mask)
3005 {
3006     int i;
3007
3008     /* Only the first four NICs may be bootable */
3009     net_boot_mask = net_boot_mask & 0xF;
3010
3011     for (i = 0; i < nb_nics; i++) {
3012         if (net_boot_mask & (1 << i)) {
3013             nd_table[i].bootable = 1;
3014             net_boot_mask &= ~(1 << i);
3015         }
3016     }
3017
3018     if (net_boot_mask) {
3019         fprintf(stderr, "Cannot boot from non-existent NIC\n");
3020         exit(1);
3021     }
3022 }
3023
3024 void do_info_network(Monitor *mon)
3025 {
3026     VLANState *vlan;
3027     VLANClientState *vc;
3028
3029     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
3030         monitor_printf(mon, "VLAN %d devices:\n", vlan->id);
3031         for(vc = vlan->first_client; vc != NULL; vc = vc->next)
3032             monitor_printf(mon, "  %s: %s\n", vc->name, vc->info_str);
3033     }
3034 }
3035
3036 int do_set_link(Monitor *mon, const char *name, const char *up_or_down)
3037 {
3038     VLANState *vlan;
3039     VLANClientState *vc = NULL;
3040
3041     for (vlan = first_vlan; vlan != NULL; vlan = vlan->next)
3042         for (vc = vlan->first_client; vc != NULL; vc = vc->next)
3043             if (strcmp(vc->name, name) == 0)
3044                 goto done;
3045 done:
3046
3047     if (!vc) {
3048         monitor_printf(mon, "could not find network device '%s'", name);
3049         return 0;
3050     }
3051
3052     if (strcmp(up_or_down, "up") == 0)
3053         vc->link_down = 0;
3054     else if (strcmp(up_or_down, "down") == 0)
3055         vc->link_down = 1;
3056     else
3057         monitor_printf(mon, "invalid link status '%s'; only 'up' or 'down' "
3058                        "valid\n", up_or_down);
3059
3060     if (vc->link_status_changed)
3061         vc->link_status_changed(vc);
3062
3063     return 1;
3064 }
3065
3066 void net_cleanup(void)
3067 {
3068     VLANState *vlan;
3069
3070     /* close network clients */
3071     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
3072         VLANClientState *vc = vlan->first_client;
3073
3074         while (vc) {
3075             VLANClientState *next = vc->next;
3076
3077             qemu_del_vlan_client(vc);
3078
3079             vc = next;
3080         }
3081     }
3082 }
3083
3084 void net_client_check(void)
3085 {
3086     VLANState *vlan;
3087
3088     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
3089         if (vlan->nb_guest_devs == 0 && vlan->nb_host_devs == 0)
3090             continue;
3091         if (vlan->nb_guest_devs == 0)
3092             fprintf(stderr, "Warning: vlan %d with no nics\n", vlan->id);
3093         if (vlan->nb_host_devs == 0)
3094             fprintf(stderr,
3095                     "Warning: vlan %d is not connected to host network\n",
3096                     vlan->id);
3097     }
3098 }