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         uint8_t *buf = s->buf;
1464
1465         size = tap_read_packet(s->fd, s->buf, sizeof(s->buf));
1466         if (size <= 0) {
1467             break;
1468         }
1469
1470 #ifdef IFF_VNET_HDR
1471         if (s->has_vnet_hdr && !s->using_vnet_hdr) {
1472             buf += sizeof(struct virtio_net_hdr);
1473             size -= sizeof(struct virtio_net_hdr);
1474         }
1475 #endif
1476
1477         size = qemu_send_packet_async(s->vc, buf, size, tap_send_completed);
1478         if (size == 0) {
1479             tap_read_poll(s, 0);
1480         }
1481     } while (size > 0);
1482 }
1483
1484 static void tap_set_sndbuf(TAPState *s, int sndbuf, Monitor *mon)
1485 {
1486 #ifdef TUNSETSNDBUF
1487     if (ioctl(s->fd, TUNSETSNDBUF, &sndbuf) == -1) {
1488         config_error(mon, "TUNSETSNDBUF ioctl failed: %s\n",
1489                      strerror(errno));
1490     }
1491 #else
1492     config_error(mon, "No '-net tap,sndbuf=<nbytes>' support available\n");
1493 #endif
1494 }
1495
1496 int tap_has_vnet_hdr(void *opaque)
1497 {
1498     VLANClientState *vc = opaque;
1499     TAPState *s = vc->opaque;
1500
1501     return s ? s->has_vnet_hdr : 0;
1502 }
1503
1504 void tap_using_vnet_hdr(void *opaque, int using_vnet_hdr)
1505 {
1506     VLANClientState *vc = opaque;
1507     TAPState *s = vc->opaque;
1508
1509     if (!s || !s->has_vnet_hdr)
1510         return;
1511
1512     s->using_vnet_hdr = using_vnet_hdr != 0;
1513 }
1514
1515 static int tap_probe_vnet_hdr(int fd)
1516 {
1517 #if defined(TUNGETIFF) && defined(IFF_VNET_HDR)
1518     struct ifreq ifr;
1519
1520     if (ioctl(fd, TUNGETIFF, &ifr) != 0) {
1521         fprintf(stderr, "TUNGETIFF ioctl() failed: %s\n", strerror(errno));
1522         return 0;
1523     }
1524
1525     return ifr.ifr_flags & IFF_VNET_HDR;
1526 #else
1527     return 0;
1528 #endif
1529 }
1530
1531 #ifdef TUNSETOFFLOAD
1532 static void tap_set_offload(VLANClientState *vc, int csum, int tso4, int tso6,
1533                             int ecn)
1534 {
1535     TAPState *s = vc->opaque;
1536     unsigned int offload = 0;
1537
1538     if (csum) {
1539         offload |= TUN_F_CSUM;
1540         if (tso4)
1541             offload |= TUN_F_TSO4;
1542         if (tso6)
1543             offload |= TUN_F_TSO6;
1544         if ((tso4 || tso6) && ecn)
1545             offload |= TUN_F_TSO_ECN;
1546     }
1547
1548     if (ioctl(s->fd, TUNSETOFFLOAD, offload) != 0)
1549         fprintf(stderr, "TUNSETOFFLOAD ioctl() failed: %s\n",
1550                 strerror(errno));
1551 }
1552 #endif /* TUNSETOFFLOAD */
1553
1554 static void tap_cleanup(VLANClientState *vc)
1555 {
1556     TAPState *s = vc->opaque;
1557
1558     qemu_purge_queued_packets(vc);
1559
1560     if (s->down_script[0])
1561         launch_script(s->down_script, s->down_script_arg, s->fd);
1562
1563     tap_read_poll(s, 0);
1564     tap_write_poll(s, 0);
1565     close(s->fd);
1566     qemu_free(s);
1567 }
1568
1569 /* fd support */
1570
1571 static TAPState *net_tap_fd_init(VLANState *vlan,
1572                                  const char *model,
1573                                  const char *name,
1574                                  int fd,
1575                                  int vnet_hdr)
1576 {
1577     TAPState *s;
1578
1579     s = qemu_mallocz(sizeof(TAPState));
1580     s->fd = fd;
1581     s->has_vnet_hdr = vnet_hdr != 0;
1582     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, tap_receive,
1583                                  tap_receive_iov, tap_cleanup, s);
1584     s->vc->receive_raw = tap_receive_raw;
1585 #ifdef TUNSETOFFLOAD
1586     s->vc->set_offload = tap_set_offload;
1587     tap_set_offload(s->vc, 0, 0, 0, 0);
1588 #endif
1589     tap_read_poll(s, 1);
1590     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "fd=%d", fd);
1591     return s;
1592 }
1593
1594 #if defined (HOST_BSD) || defined (__FreeBSD_kernel__)
1595 static int tap_open(char *ifname, int ifname_size)
1596 {
1597     int fd;
1598     char *dev;
1599     struct stat s;
1600
1601     TFR(fd = open("/dev/tap", O_RDWR));
1602     if (fd < 0) {
1603         fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n");
1604         return -1;
1605     }
1606
1607     fstat(fd, &s);
1608     dev = devname(s.st_rdev, S_IFCHR);
1609     pstrcpy(ifname, ifname_size, dev);
1610
1611     fcntl(fd, F_SETFL, O_NONBLOCK);
1612     return fd;
1613 }
1614 #elif defined(__sun__)
1615 #define TUNNEWPPA       (('T'<<16) | 0x0001)
1616 /*
1617  * Allocate TAP device, returns opened fd.
1618  * Stores dev name in the first arg(must be large enough).
1619  */
1620 static int tap_alloc(char *dev, size_t dev_size)
1621 {
1622     int tap_fd, if_fd, ppa = -1;
1623     static int ip_fd = 0;
1624     char *ptr;
1625
1626     static int arp_fd = 0;
1627     int ip_muxid, arp_muxid;
1628     struct strioctl  strioc_if, strioc_ppa;
1629     int link_type = I_PLINK;;
1630     struct lifreq ifr;
1631     char actual_name[32] = "";
1632
1633     memset(&ifr, 0x0, sizeof(ifr));
1634
1635     if( *dev ){
1636        ptr = dev;
1637        while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
1638        ppa = atoi(ptr);
1639     }
1640
1641     /* Check if IP device was opened */
1642     if( ip_fd )
1643        close(ip_fd);
1644
1645     TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
1646     if (ip_fd < 0) {
1647        syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)");
1648        return -1;
1649     }
1650
1651     TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
1652     if (tap_fd < 0) {
1653        syslog(LOG_ERR, "Can't open /dev/tap");
1654        return -1;
1655     }
1656
1657     /* Assign a new PPA and get its unit number. */
1658     strioc_ppa.ic_cmd = TUNNEWPPA;
1659     strioc_ppa.ic_timout = 0;
1660     strioc_ppa.ic_len = sizeof(ppa);
1661     strioc_ppa.ic_dp = (char *)&ppa;
1662     if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
1663        syslog (LOG_ERR, "Can't assign new interface");
1664
1665     TFR(if_fd = open("/dev/tap", O_RDWR, 0));
1666     if (if_fd < 0) {
1667        syslog(LOG_ERR, "Can't open /dev/tap (2)");
1668        return -1;
1669     }
1670     if(ioctl(if_fd, I_PUSH, "ip") < 0){
1671        syslog(LOG_ERR, "Can't push IP module");
1672        return -1;
1673     }
1674
1675     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
1676         syslog(LOG_ERR, "Can't get flags\n");
1677
1678     snprintf (actual_name, 32, "tap%d", ppa);
1679     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
1680
1681     ifr.lifr_ppa = ppa;
1682     /* Assign ppa according to the unit number returned by tun device */
1683
1684     if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
1685         syslog (LOG_ERR, "Can't set PPA %d", ppa);
1686     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
1687         syslog (LOG_ERR, "Can't get flags\n");
1688     /* Push arp module to if_fd */
1689     if (ioctl (if_fd, I_PUSH, "arp") < 0)
1690         syslog (LOG_ERR, "Can't push ARP module (2)");
1691
1692     /* Push arp module to ip_fd */
1693     if (ioctl (ip_fd, I_POP, NULL) < 0)
1694         syslog (LOG_ERR, "I_POP failed\n");
1695     if (ioctl (ip_fd, I_PUSH, "arp") < 0)
1696         syslog (LOG_ERR, "Can't push ARP module (3)\n");
1697     /* Open arp_fd */
1698     TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
1699     if (arp_fd < 0)
1700        syslog (LOG_ERR, "Can't open %s\n", "/dev/tap");
1701
1702     /* Set ifname to arp */
1703     strioc_if.ic_cmd = SIOCSLIFNAME;
1704     strioc_if.ic_timout = 0;
1705     strioc_if.ic_len = sizeof(ifr);
1706     strioc_if.ic_dp = (char *)&ifr;
1707     if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
1708         syslog (LOG_ERR, "Can't set ifname to arp\n");
1709     }
1710
1711     if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
1712        syslog(LOG_ERR, "Can't link TAP device to IP");
1713        return -1;
1714     }
1715
1716     if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
1717         syslog (LOG_ERR, "Can't link TAP device to ARP");
1718
1719     close (if_fd);
1720
1721     memset(&ifr, 0x0, sizeof(ifr));
1722     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
1723     ifr.lifr_ip_muxid  = ip_muxid;
1724     ifr.lifr_arp_muxid = arp_muxid;
1725
1726     if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
1727     {
1728       ioctl (ip_fd, I_PUNLINK , arp_muxid);
1729       ioctl (ip_fd, I_PUNLINK, ip_muxid);
1730       syslog (LOG_ERR, "Can't set multiplexor id");
1731     }
1732
1733     snprintf(dev, dev_size, "tap%d", ppa);
1734     return tap_fd;
1735 }
1736
1737 static int tap_open(char *ifname, int ifname_size, int *vnet_hdr)
1738 {
1739     char  dev[10]="";
1740     int fd;
1741     if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){
1742        fprintf(stderr, "Cannot allocate TAP device\n");
1743        return -1;
1744     }
1745     pstrcpy(ifname, ifname_size, dev);
1746     fcntl(fd, F_SETFL, O_NONBLOCK);
1747     return fd;
1748 }
1749 #elif defined (_AIX)
1750 static int tap_open(char *ifname, int ifname_size)
1751 {
1752     fprintf (stderr, "no tap on AIX\n");
1753     return -1;
1754 }
1755 #else
1756 static int tap_open(char *ifname, int ifname_size, int *vnet_hdr)
1757 {
1758     struct ifreq ifr;
1759     int fd, ret;
1760
1761     TFR(fd = open("/dev/net/tun", O_RDWR));
1762     if (fd < 0) {
1763         fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n");
1764         return -1;
1765     }
1766     memset(&ifr, 0, sizeof(ifr));
1767     ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
1768
1769 #if defined(TUNGETFEATURES) && defined(IFF_VNET_HDR)
1770     {
1771         unsigned int features;
1772
1773         if (ioctl(fd, TUNGETFEATURES, &features) == 0 &&
1774             features & IFF_VNET_HDR) {
1775             *vnet_hdr = 1;
1776             ifr.ifr_flags |= IFF_VNET_HDR;
1777         }
1778     }
1779 #endif
1780
1781     if (ifname[0] != '\0')
1782         pstrcpy(ifr.ifr_name, IFNAMSIZ, ifname);
1783     else
1784         pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d");
1785     ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
1786     if (ret != 0) {
1787         fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n");
1788         close(fd);
1789         return -1;
1790     }
1791     pstrcpy(ifname, ifname_size, ifr.ifr_name);
1792     fcntl(fd, F_SETFL, O_NONBLOCK);
1793     return fd;
1794 }
1795 #endif
1796
1797 static int launch_script(const char *setup_script, const char *ifname, int fd)
1798 {
1799     sigset_t oldmask, mask;
1800     int pid, status;
1801     char *args[3];
1802     char **parg;
1803
1804     sigemptyset(&mask);
1805     sigaddset(&mask, SIGCHLD);
1806     sigprocmask(SIG_BLOCK, &mask, &oldmask);
1807
1808     /* try to launch network script */
1809     pid = fork();
1810     if (pid == 0) {
1811         int open_max = sysconf(_SC_OPEN_MAX), i;
1812
1813         for (i = 0; i < open_max; i++) {
1814             if (i != STDIN_FILENO &&
1815                 i != STDOUT_FILENO &&
1816                 i != STDERR_FILENO &&
1817                 i != fd) {
1818                 close(i);
1819             }
1820         }
1821         parg = args;
1822         *parg++ = (char *)setup_script;
1823         *parg++ = (char *)ifname;
1824         *parg++ = NULL;
1825         execv(setup_script, args);
1826         _exit(1);
1827     } else if (pid > 0) {
1828         while (waitpid(pid, &status, 0) != pid) {
1829             /* loop */
1830         }
1831         sigprocmask(SIG_SETMASK, &oldmask, NULL);
1832
1833         if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
1834             return 0;
1835         }
1836     }
1837     fprintf(stderr, "%s: could not launch network script\n", setup_script);
1838     return -1;
1839 }
1840
1841 static TAPState *net_tap_init(VLANState *vlan, const char *model,
1842                               const char *name, const char *ifname1,
1843                               const char *setup_script, const char *down_script)
1844 {
1845     TAPState *s;
1846     int fd;
1847     int vnet_hdr;
1848     char ifname[128];
1849
1850     if (ifname1 != NULL)
1851         pstrcpy(ifname, sizeof(ifname), ifname1);
1852     else
1853         ifname[0] = '\0';
1854     vnet_hdr = 0;
1855     TFR(fd = tap_open(ifname, sizeof(ifname), &vnet_hdr));
1856     if (fd < 0)
1857         return NULL;
1858
1859     if (!setup_script || !strcmp(setup_script, "no"))
1860         setup_script = "";
1861     if (setup_script[0] != '\0' &&
1862         launch_script(setup_script, ifname, fd)) {
1863         return NULL;
1864     }
1865     s = net_tap_fd_init(vlan, model, name, fd, vnet_hdr);
1866     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1867              "ifname=%s,script=%s,downscript=%s",
1868              ifname, setup_script, down_script);
1869     if (down_script && strcmp(down_script, "no")) {
1870         snprintf(s->down_script, sizeof(s->down_script), "%s", down_script);
1871         snprintf(s->down_script_arg, sizeof(s->down_script_arg), "%s", ifname);
1872     }
1873     return s;
1874 }
1875
1876 #endif /* !_WIN32 */
1877
1878 #if defined(CONFIG_VDE)
1879 typedef struct VDEState {
1880     VLANClientState *vc;
1881     VDECONN *vde;
1882 } VDEState;
1883
1884 static void vde_to_qemu(void *opaque)
1885 {
1886     VDEState *s = opaque;
1887     uint8_t buf[4096];
1888     int size;
1889
1890     size = vde_recv(s->vde, (char *)buf, sizeof(buf), 0);
1891     if (size > 0) {
1892         qemu_send_packet(s->vc, buf, size);
1893     }
1894 }
1895
1896 static ssize_t vde_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1897 {
1898     VDEState *s = vc->opaque;
1899     ssize_t ret;
1900
1901     do {
1902       ret = vde_send(s->vde, (const char *)buf, size, 0);
1903     } while (ret < 0 && errno == EINTR);
1904
1905     return ret;
1906 }
1907
1908 static void vde_cleanup(VLANClientState *vc)
1909 {
1910     VDEState *s = vc->opaque;
1911     qemu_set_fd_handler(vde_datafd(s->vde), NULL, NULL, NULL);
1912     vde_close(s->vde);
1913     qemu_free(s);
1914 }
1915
1916 static int net_vde_init(VLANState *vlan, const char *model,
1917                         const char *name, const char *sock,
1918                         int port, const char *group, int mode)
1919 {
1920     VDEState *s;
1921     char *init_group = strlen(group) ? (char *)group : NULL;
1922     char *init_sock = strlen(sock) ? (char *)sock : NULL;
1923
1924     struct vde_open_args args = {
1925         .port = port,
1926         .group = init_group,
1927         .mode = mode,
1928     };
1929
1930     s = qemu_mallocz(sizeof(VDEState));
1931     s->vde = vde_open(init_sock, (char *)"QEMU", &args);
1932     if (!s->vde){
1933         free(s);
1934         return -1;
1935     }
1936     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, vde_receive,
1937                                  NULL, vde_cleanup, s);
1938     qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
1939     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "sock=%s,fd=%d",
1940              sock, vde_datafd(s->vde));
1941     return 0;
1942 }
1943 #endif
1944
1945 /* network connection */
1946 typedef struct NetSocketState {
1947     VLANClientState *vc;
1948     int fd;
1949     int state; /* 0 = getting length, 1 = getting data */
1950     unsigned int index;
1951     unsigned int packet_len;
1952     uint8_t buf[4096];
1953     struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
1954 } NetSocketState;
1955
1956 typedef struct NetSocketListenState {
1957     VLANState *vlan;
1958     char *model;
1959     char *name;
1960     int fd;
1961 } NetSocketListenState;
1962
1963 /* XXX: we consider we can send the whole packet without blocking */
1964 static ssize_t net_socket_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1965 {
1966     NetSocketState *s = vc->opaque;
1967     uint32_t len;
1968     len = htonl(size);
1969
1970     send_all(s->fd, (const uint8_t *)&len, sizeof(len));
1971     return send_all(s->fd, buf, size);
1972 }
1973
1974 static ssize_t net_socket_receive_dgram(VLANClientState *vc, const uint8_t *buf, size_t size)
1975 {
1976     NetSocketState *s = vc->opaque;
1977
1978     return sendto(s->fd, (const void *)buf, size, 0,
1979                   (struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst));
1980 }
1981
1982 static void net_socket_send(void *opaque)
1983 {
1984     NetSocketState *s = opaque;
1985     int size, err;
1986     unsigned l;
1987     uint8_t buf1[4096];
1988     const uint8_t *buf;
1989
1990     size = recv(s->fd, (void *)buf1, sizeof(buf1), 0);
1991     if (size < 0) {
1992         err = socket_error();
1993         if (err != EWOULDBLOCK)
1994             goto eoc;
1995     } else if (size == 0) {
1996         /* end of connection */
1997     eoc:
1998         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1999         closesocket(s->fd);
2000         return;
2001     }
2002     buf = buf1;
2003     while (size > 0) {
2004         /* reassemble a packet from the network */
2005         switch(s->state) {
2006         case 0:
2007             l = 4 - s->index;
2008             if (l > size)
2009                 l = size;
2010             memcpy(s->buf + s->index, buf, l);
2011             buf += l;
2012             size -= l;
2013             s->index += l;
2014             if (s->index == 4) {
2015                 /* got length */
2016                 s->packet_len = ntohl(*(uint32_t *)s->buf);
2017                 s->index = 0;
2018                 s->state = 1;
2019             }
2020             break;
2021         case 1:
2022             l = s->packet_len - s->index;
2023             if (l > size)
2024                 l = size;
2025             if (s->index + l <= sizeof(s->buf)) {
2026                 memcpy(s->buf + s->index, buf, l);
2027             } else {
2028                 fprintf(stderr, "serious error: oversized packet received,"
2029                     "connection terminated.\n");
2030                 s->state = 0;
2031                 goto eoc;
2032             }
2033
2034             s->index += l;
2035             buf += l;
2036             size -= l;
2037             if (s->index >= s->packet_len) {
2038                 qemu_send_packet(s->vc, s->buf, s->packet_len);
2039                 s->index = 0;
2040                 s->state = 0;
2041             }
2042             break;
2043         }
2044     }
2045 }
2046
2047 static void net_socket_send_dgram(void *opaque)
2048 {
2049     NetSocketState *s = opaque;
2050     int size;
2051
2052     size = recv(s->fd, (void *)s->buf, sizeof(s->buf), 0);
2053     if (size < 0)
2054         return;
2055     if (size == 0) {
2056         /* end of connection */
2057         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
2058         return;
2059     }
2060     qemu_send_packet(s->vc, s->buf, size);
2061 }
2062
2063 static int net_socket_mcast_create(struct sockaddr_in *mcastaddr)
2064 {
2065     struct ip_mreq imr;
2066     int fd;
2067     int val, ret;
2068     if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
2069         fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n",
2070                 inet_ntoa(mcastaddr->sin_addr),
2071                 (int)ntohl(mcastaddr->sin_addr.s_addr));
2072         return -1;
2073
2074     }
2075     fd = socket(PF_INET, SOCK_DGRAM, 0);
2076     if (fd < 0) {
2077         perror("socket(PF_INET, SOCK_DGRAM)");
2078         return -1;
2079     }
2080
2081     val = 1;
2082     ret=setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
2083                    (const char *)&val, sizeof(val));
2084     if (ret < 0) {
2085         perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
2086         goto fail;
2087     }
2088
2089     ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
2090     if (ret < 0) {
2091         perror("bind");
2092         goto fail;
2093     }
2094
2095     /* Add host to multicast group */
2096     imr.imr_multiaddr = mcastaddr->sin_addr;
2097     imr.imr_interface.s_addr = htonl(INADDR_ANY);
2098
2099     ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
2100                      (const char *)&imr, sizeof(struct ip_mreq));
2101     if (ret < 0) {
2102         perror("setsockopt(IP_ADD_MEMBERSHIP)");
2103         goto fail;
2104     }
2105
2106     /* Force mcast msgs to loopback (eg. several QEMUs in same host */
2107     val = 1;
2108     ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
2109                    (const char *)&val, sizeof(val));
2110     if (ret < 0) {
2111         perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
2112         goto fail;
2113     }
2114
2115     socket_set_nonblock(fd);
2116     return fd;
2117 fail:
2118     if (fd >= 0)
2119         closesocket(fd);
2120     return -1;
2121 }
2122
2123 static void net_socket_cleanup(VLANClientState *vc)
2124 {
2125     NetSocketState *s = vc->opaque;
2126     qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
2127     close(s->fd);
2128     qemu_free(s);
2129 }
2130
2131 static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
2132                                                 const char *model,
2133                                                 const char *name,
2134                                                 int fd, int is_connected)
2135 {
2136     struct sockaddr_in saddr;
2137     int newfd;
2138     socklen_t saddr_len;
2139     NetSocketState *s;
2140
2141     /* fd passed: multicast: "learn" dgram_dst address from bound address and save it
2142      * Because this may be "shared" socket from a "master" process, datagrams would be recv()
2143      * by ONLY ONE process: we must "clone" this dgram socket --jjo
2144      */
2145
2146     if (is_connected) {
2147         if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
2148             /* must be bound */
2149             if (saddr.sin_addr.s_addr==0) {
2150                 fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, cannot setup multicast dst addr\n",
2151                         fd);
2152                 return NULL;
2153             }
2154             /* clone dgram socket */
2155             newfd = net_socket_mcast_create(&saddr);
2156             if (newfd < 0) {
2157                 /* error already reported by net_socket_mcast_create() */
2158                 close(fd);
2159                 return NULL;
2160             }
2161             /* clone newfd to fd, close newfd */
2162             dup2(newfd, fd);
2163             close(newfd);
2164
2165         } else {
2166             fprintf(stderr, "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
2167                     fd, strerror(errno));
2168             return NULL;
2169         }
2170     }
2171
2172     s = qemu_mallocz(sizeof(NetSocketState));
2173     s->fd = fd;
2174
2175     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, net_socket_receive_dgram,
2176                                  NULL, net_socket_cleanup, s);
2177     qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s);
2178
2179     /* mcast: save bound address as dst */
2180     if (is_connected) s->dgram_dst=saddr;
2181
2182     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2183             "socket: fd=%d (%s mcast=%s:%d)",
2184             fd, is_connected? "cloned" : "",
2185             inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2186     return s;
2187 }
2188
2189 static void net_socket_connect(void *opaque)
2190 {
2191     NetSocketState *s = opaque;
2192     qemu_set_fd_handler(s->fd, net_socket_send, NULL, s);
2193 }
2194
2195 static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
2196                                                  const char *model,
2197                                                  const char *name,
2198                                                  int fd, int is_connected)
2199 {
2200     NetSocketState *s;
2201     s = qemu_mallocz(sizeof(NetSocketState));
2202     s->fd = fd;
2203     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, net_socket_receive,
2204                                  NULL, net_socket_cleanup, s);
2205     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2206              "socket: fd=%d", fd);
2207     if (is_connected) {
2208         net_socket_connect(s);
2209     } else {
2210         qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
2211     }
2212     return s;
2213 }
2214
2215 static NetSocketState *net_socket_fd_init(VLANState *vlan,
2216                                           const char *model, const char *name,
2217                                           int fd, int is_connected)
2218 {
2219     int so_type=-1, optlen=sizeof(so_type);
2220
2221     if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type,
2222         (socklen_t *)&optlen)< 0) {
2223         fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n", fd);
2224         return NULL;
2225     }
2226     switch(so_type) {
2227     case SOCK_DGRAM:
2228         return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected);
2229     case SOCK_STREAM:
2230         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
2231     default:
2232         /* who knows ... this could be a eg. a pty, do warn and continue as stream */
2233         fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
2234         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
2235     }
2236     return NULL;
2237 }
2238
2239 static void net_socket_accept(void *opaque)
2240 {
2241     NetSocketListenState *s = opaque;
2242     NetSocketState *s1;
2243     struct sockaddr_in saddr;
2244     socklen_t len;
2245     int fd;
2246
2247     for(;;) {
2248         len = sizeof(saddr);
2249         fd = accept(s->fd, (struct sockaddr *)&saddr, &len);
2250         if (fd < 0 && errno != EINTR) {
2251             return;
2252         } else if (fd >= 0) {
2253             break;
2254         }
2255     }
2256     s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1);
2257     if (!s1) {
2258         closesocket(fd);
2259     } else {
2260         snprintf(s1->vc->info_str, sizeof(s1->vc->info_str),
2261                  "socket: connection from %s:%d",
2262                  inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2263     }
2264 }
2265
2266 static int net_socket_listen_init(VLANState *vlan,
2267                                   const char *model,
2268                                   const char *name,
2269                                   const char *host_str)
2270 {
2271     NetSocketListenState *s;
2272     int fd, val, ret;
2273     struct sockaddr_in saddr;
2274
2275     if (parse_host_port(&saddr, host_str) < 0)
2276         return -1;
2277
2278     s = qemu_mallocz(sizeof(NetSocketListenState));
2279
2280     fd = socket(PF_INET, SOCK_STREAM, 0);
2281     if (fd < 0) {
2282         perror("socket");
2283         return -1;
2284     }
2285     socket_set_nonblock(fd);
2286
2287     /* allow fast reuse */
2288     val = 1;
2289     setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));
2290
2291     ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
2292     if (ret < 0) {
2293         perror("bind");
2294         return -1;
2295     }
2296     ret = listen(fd, 0);
2297     if (ret < 0) {
2298         perror("listen");
2299         return -1;
2300     }
2301     s->vlan = vlan;
2302     s->model = strdup(model);
2303     s->name = name ? strdup(name) : NULL;
2304     s->fd = fd;
2305     qemu_set_fd_handler(fd, net_socket_accept, NULL, s);
2306     return 0;
2307 }
2308
2309 static int net_socket_connect_init(VLANState *vlan,
2310                                    const char *model,
2311                                    const char *name,
2312                                    const char *host_str)
2313 {
2314     NetSocketState *s;
2315     int fd, connected, ret, err;
2316     struct sockaddr_in saddr;
2317
2318     if (parse_host_port(&saddr, host_str) < 0)
2319         return -1;
2320
2321     fd = socket(PF_INET, SOCK_STREAM, 0);
2322     if (fd < 0) {
2323         perror("socket");
2324         return -1;
2325     }
2326     socket_set_nonblock(fd);
2327
2328     connected = 0;
2329     for(;;) {
2330         ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
2331         if (ret < 0) {
2332             err = socket_error();
2333             if (err == EINTR || err == EWOULDBLOCK) {
2334             } else if (err == EINPROGRESS) {
2335                 break;
2336 #ifdef _WIN32
2337             } else if (err == WSAEALREADY) {
2338                 break;
2339 #endif
2340             } else {
2341                 perror("connect");
2342                 closesocket(fd);
2343                 return -1;
2344             }
2345         } else {
2346             connected = 1;
2347             break;
2348         }
2349     }
2350     s = net_socket_fd_init(vlan, model, name, fd, connected);
2351     if (!s)
2352         return -1;
2353     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2354              "socket: connect to %s:%d",
2355              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2356     return 0;
2357 }
2358
2359 static int net_socket_mcast_init(VLANState *vlan,
2360                                  const char *model,
2361                                  const char *name,
2362                                  const char *host_str)
2363 {
2364     NetSocketState *s;
2365     int fd;
2366     struct sockaddr_in saddr;
2367
2368     if (parse_host_port(&saddr, host_str) < 0)
2369         return -1;
2370
2371
2372     fd = net_socket_mcast_create(&saddr);
2373     if (fd < 0)
2374         return -1;
2375
2376     s = net_socket_fd_init(vlan, model, name, fd, 0);
2377     if (!s)
2378         return -1;
2379
2380     s->dgram_dst = saddr;
2381
2382     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2383              "socket: mcast=%s:%d",
2384              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2385     return 0;
2386
2387 }
2388
2389 typedef struct DumpState {
2390     VLANClientState *pcap_vc;
2391     int fd;
2392     int pcap_caplen;
2393 } DumpState;
2394
2395 #define PCAP_MAGIC 0xa1b2c3d4
2396
2397 struct pcap_file_hdr {
2398     uint32_t magic;
2399     uint16_t version_major;
2400     uint16_t version_minor;
2401     int32_t thiszone;
2402     uint32_t sigfigs;
2403     uint32_t snaplen;
2404     uint32_t linktype;
2405 };
2406
2407 struct pcap_sf_pkthdr {
2408     struct {
2409         int32_t tv_sec;
2410         int32_t tv_usec;
2411     } ts;
2412     uint32_t caplen;
2413     uint32_t len;
2414 };
2415
2416 static ssize_t dump_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
2417 {
2418     DumpState *s = vc->opaque;
2419     struct pcap_sf_pkthdr hdr;
2420     int64_t ts;
2421     int caplen;
2422
2423     /* Early return in case of previous error. */
2424     if (s->fd < 0) {
2425         return size;
2426     }
2427
2428     ts = muldiv64(qemu_get_clock(vm_clock), 1000000, ticks_per_sec);
2429     caplen = size > s->pcap_caplen ? s->pcap_caplen : size;
2430
2431     hdr.ts.tv_sec = ts / 1000000;
2432     hdr.ts.tv_usec = ts % 1000000;
2433     hdr.caplen = caplen;
2434     hdr.len = size;
2435     if (write(s->fd, &hdr, sizeof(hdr)) != sizeof(hdr) ||
2436         write(s->fd, buf, caplen) != caplen) {
2437         qemu_log("-net dump write error - stop dump\n");
2438         close(s->fd);
2439         s->fd = -1;
2440     }
2441
2442     return size;
2443 }
2444
2445 static void net_dump_cleanup(VLANClientState *vc)
2446 {
2447     DumpState *s = vc->opaque;
2448
2449     close(s->fd);
2450     qemu_free(s);
2451 }
2452
2453 static int net_dump_init(Monitor *mon, VLANState *vlan, const char *device,
2454                          const char *name, const char *filename, int len)
2455 {
2456     struct pcap_file_hdr hdr;
2457     DumpState *s;
2458
2459     s = qemu_malloc(sizeof(DumpState));
2460
2461     s->fd = open(filename, O_CREAT | O_WRONLY | O_BINARY, 0644);
2462     if (s->fd < 0) {
2463         config_error(mon, "-net dump: can't open %s\n", filename);
2464         return -1;
2465     }
2466
2467     s->pcap_caplen = len;
2468
2469     hdr.magic = PCAP_MAGIC;
2470     hdr.version_major = 2;
2471     hdr.version_minor = 4;
2472     hdr.thiszone = 0;
2473     hdr.sigfigs = 0;
2474     hdr.snaplen = s->pcap_caplen;
2475     hdr.linktype = 1;
2476
2477     if (write(s->fd, &hdr, sizeof(hdr)) < sizeof(hdr)) {
2478         config_error(mon, "-net dump write error: %s\n", strerror(errno));
2479         close(s->fd);
2480         qemu_free(s);
2481         return -1;
2482     }
2483
2484     s->pcap_vc = qemu_new_vlan_client(vlan, device, name, NULL, dump_receive, NULL,
2485                                       net_dump_cleanup, s);
2486     snprintf(s->pcap_vc->info_str, sizeof(s->pcap_vc->info_str),
2487              "dump to %s (len=%d)", filename, len);
2488     return 0;
2489 }
2490
2491 /* find or alloc a new VLAN */
2492 VLANState *qemu_find_vlan(int id, int allocate)
2493 {
2494     VLANState **pvlan, *vlan;
2495     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2496         if (vlan->id == id)
2497             return vlan;
2498     }
2499     if (!allocate) {
2500         return NULL;
2501     }
2502     vlan = qemu_mallocz(sizeof(VLANState));
2503     vlan->id = id;
2504     vlan->next = NULL;
2505     pvlan = &first_vlan;
2506     while (*pvlan != NULL)
2507         pvlan = &(*pvlan)->next;
2508     *pvlan = vlan;
2509     return vlan;
2510 }
2511
2512 static int nic_get_free_idx(void)
2513 {
2514     int index;
2515
2516     for (index = 0; index < MAX_NICS; index++)
2517         if (!nd_table[index].used)
2518             return index;
2519     return -1;
2520 }
2521
2522 void qemu_check_nic_model(NICInfo *nd, const char *model)
2523 {
2524     const char *models[2];
2525
2526     models[0] = model;
2527     models[1] = NULL;
2528
2529     qemu_check_nic_model_list(nd, models, model);
2530 }
2531
2532 void qemu_check_nic_model_list(NICInfo *nd, const char * const *models,
2533                                const char *default_model)
2534 {
2535     int i, exit_status = 0;
2536
2537     if (!nd->model)
2538         nd->model = strdup(default_model);
2539
2540     if (strcmp(nd->model, "?") != 0) {
2541         for (i = 0 ; models[i]; i++)
2542             if (strcmp(nd->model, models[i]) == 0)
2543                 return;
2544
2545         fprintf(stderr, "qemu: Unsupported NIC model: %s\n", nd->model);
2546         exit_status = 1;
2547     }
2548
2549     fprintf(stderr, "qemu: Supported NIC models: ");
2550     for (i = 0 ; models[i]; i++)
2551         fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
2552
2553     exit(exit_status);
2554 }
2555
2556 int net_client_init(Monitor *mon, const char *device, const char *p)
2557 {
2558     char buf[1024];
2559     int vlan_id, ret;
2560     VLANState *vlan;
2561     char *name = NULL;
2562
2563     vlan_id = 0;
2564     if (get_param_value(buf, sizeof(buf), "vlan", p)) {
2565         vlan_id = strtol(buf, NULL, 0);
2566     }
2567     vlan = qemu_find_vlan(vlan_id, 1);
2568
2569     if (get_param_value(buf, sizeof(buf), "name", p)) {
2570         name = qemu_strdup(buf);
2571     }
2572     if (!strcmp(device, "nic")) {
2573         static const char * const nic_params[] = {
2574             "vlan", "name", "macaddr", "model", "addr", "vectors", NULL
2575         };
2576         NICInfo *nd;
2577         uint8_t *macaddr;
2578         int idx = nic_get_free_idx();
2579
2580         if (check_params(buf, sizeof(buf), nic_params, p) < 0) {
2581             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2582             ret = -1;
2583             goto out;
2584         }
2585         if (idx == -1 || nb_nics >= MAX_NICS) {
2586             config_error(mon, "Too Many NICs\n");
2587             ret = -1;
2588             goto out;
2589         }
2590         nd = &nd_table[idx];
2591         macaddr = nd->macaddr;
2592         macaddr[0] = 0x52;
2593         macaddr[1] = 0x54;
2594         macaddr[2] = 0x00;
2595         macaddr[3] = 0x12;
2596         macaddr[4] = 0x34;
2597         macaddr[5] = 0x56 + idx;
2598
2599         if (get_param_value(buf, sizeof(buf), "macaddr", p)) {
2600             if (parse_macaddr(macaddr, buf) < 0) {
2601                 config_error(mon, "invalid syntax for ethernet address\n");
2602                 ret = -1;
2603                 goto out;
2604             }
2605         }
2606         if (get_param_value(buf, sizeof(buf), "model", p)) {
2607             nd->model = strdup(buf);
2608         }
2609         if (get_param_value(buf, sizeof(buf), "addr", p)) {
2610             nd->devaddr = strdup(buf);
2611         }
2612         nd->nvectors = NIC_NVECTORS_UNSPECIFIED;
2613         if (get_param_value(buf, sizeof(buf), "vectors", p)) {
2614             char *endptr;
2615             long vectors = strtol(buf, &endptr, 0);
2616             if (*endptr) {
2617                 config_error(mon, "invalid syntax for # of vectors\n");
2618                 ret = -1;
2619                 goto out;
2620             }
2621             if (vectors < 0 || vectors > 0x7ffffff) {
2622                 config_error(mon, "invalid # of vectors\n");
2623                 ret = -1;
2624                 goto out;
2625             }
2626             nd->nvectors = vectors;
2627         }
2628         nd->vlan = vlan;
2629         nd->name = name;
2630         nd->used = 1;
2631         name = NULL;
2632         nb_nics++;
2633         vlan->nb_guest_devs++;
2634         ret = idx;
2635     } else
2636     if (!strcmp(device, "none")) {
2637         if (*p != '\0') {
2638             config_error(mon, "'none' takes no parameters\n");
2639             ret = -1;
2640             goto out;
2641         }
2642         /* does nothing. It is needed to signal that no network cards
2643            are wanted */
2644         ret = 0;
2645     } else
2646 #ifdef CONFIG_SLIRP
2647     if (!strcmp(device, "user")) {
2648         static const char * const slirp_params[] = {
2649             "vlan", "name", "hostname", "restrict", "ip", "net", "host",
2650             "tftp", "bootfile", "dhcpstart", "dns", "smb", "smbserver",
2651             "hostfwd", "guestfwd", NULL
2652         };
2653         struct slirp_config_str *config;
2654         int restricted = 0;
2655         char *vnet = NULL;
2656         char *vhost = NULL;
2657         char *vhostname = NULL;
2658         char *tftp_export = NULL;
2659         char *bootfile = NULL;
2660         char *vdhcp_start = NULL;
2661         char *vnamesrv = NULL;
2662         char *smb_export = NULL;
2663         char *vsmbsrv = NULL;
2664         const char *q;
2665
2666         if (check_params(buf, sizeof(buf), slirp_params, p) < 0) {
2667             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2668             ret = -1;
2669             goto out;
2670         }
2671         if (get_param_value(buf, sizeof(buf), "ip", p)) {
2672             int vnet_buflen = strlen(buf) + strlen("/24") + 1;
2673             /* emulate legacy parameter */
2674             vnet = qemu_malloc(vnet_buflen);
2675             pstrcpy(vnet, vnet_buflen, buf);
2676             pstrcat(vnet, vnet_buflen, "/24");
2677         }
2678         if (get_param_value(buf, sizeof(buf), "net", p)) {
2679             vnet = qemu_strdup(buf);
2680         }
2681         if (get_param_value(buf, sizeof(buf), "host", p)) {
2682             vhost = qemu_strdup(buf);
2683         }
2684         if (get_param_value(buf, sizeof(buf), "hostname", p)) {
2685             vhostname = qemu_strdup(buf);
2686         }
2687         if (get_param_value(buf, sizeof(buf), "restrict", p)) {
2688             restricted = (buf[0] == 'y') ? 1 : 0;
2689         }
2690         if (get_param_value(buf, sizeof(buf), "dhcpstart", p)) {
2691             vdhcp_start = qemu_strdup(buf);
2692         }
2693         if (get_param_value(buf, sizeof(buf), "dns", p)) {
2694             vnamesrv = qemu_strdup(buf);
2695         }
2696         if (get_param_value(buf, sizeof(buf), "tftp", p)) {
2697             tftp_export = qemu_strdup(buf);
2698         }
2699         if (get_param_value(buf, sizeof(buf), "bootfile", p)) {
2700             bootfile = qemu_strdup(buf);
2701         }
2702         if (get_param_value(buf, sizeof(buf), "smb", p)) {
2703             smb_export = qemu_strdup(buf);
2704             if (get_param_value(buf, sizeof(buf), "smbserver", p)) {
2705                 vsmbsrv = qemu_strdup(buf);
2706             }
2707         }
2708         q = p;
2709         while (1) {
2710             config = qemu_malloc(sizeof(*config));
2711             if (!get_next_param_value(config->str, sizeof(config->str),
2712                                       "hostfwd", &q)) {
2713                 break;
2714             }
2715             config->flags = SLIRP_CFG_HOSTFWD;
2716             config->next = slirp_configs;
2717             slirp_configs = config;
2718             config = NULL;
2719         }
2720         q = p;
2721         while (1) {
2722             config = qemu_malloc(sizeof(*config));
2723             if (!get_next_param_value(config->str, sizeof(config->str),
2724                                       "guestfwd", &q)) {
2725                 break;
2726             }
2727             config->flags = 0;
2728             config->next = slirp_configs;
2729             slirp_configs = config;
2730             config = NULL;
2731         }
2732         qemu_free(config);
2733         vlan->nb_host_devs++;
2734         ret = net_slirp_init(mon, vlan, device, name, restricted, vnet, vhost,
2735                              vhostname, tftp_export, bootfile, vdhcp_start,
2736                              vnamesrv, smb_export, vsmbsrv);
2737         qemu_free(vnet);
2738         qemu_free(vhost);
2739         qemu_free(vhostname);
2740         qemu_free(tftp_export);
2741         qemu_free(bootfile);
2742         qemu_free(vdhcp_start);
2743         qemu_free(vnamesrv);
2744         qemu_free(smb_export);
2745         qemu_free(vsmbsrv);
2746     } else if (!strcmp(device, "channel")) {
2747         if (TAILQ_EMPTY(&slirp_stacks)) {
2748             struct slirp_config_str *config;
2749
2750             config = qemu_malloc(sizeof(*config));
2751             pstrcpy(config->str, sizeof(config->str), p);
2752             config->flags = SLIRP_CFG_LEGACY;
2753             config->next = slirp_configs;
2754             slirp_configs = config;
2755         } else {
2756             slirp_guestfwd(TAILQ_FIRST(&slirp_stacks), mon, p, 1);
2757         }
2758         ret = 0;
2759     } else
2760 #endif
2761 #ifdef _WIN32
2762     if (!strcmp(device, "tap")) {
2763         static const char * const tap_params[] = {
2764             "vlan", "name", "ifname", NULL
2765         };
2766         char ifname[64];
2767
2768         if (check_params(buf, sizeof(buf), tap_params, p) < 0) {
2769             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2770             ret = -1;
2771             goto out;
2772         }
2773         if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
2774             config_error(mon, "tap: no interface name\n");
2775             ret = -1;
2776             goto out;
2777         }
2778         vlan->nb_host_devs++;
2779         ret = tap_win32_init(vlan, device, name, ifname);
2780     } else
2781 #elif defined (_AIX)
2782 #else
2783     if (!strcmp(device, "tap")) {
2784         char ifname[64], chkbuf[64];
2785         char setup_script[1024], down_script[1024];
2786         TAPState *s;
2787         int fd;
2788         vlan->nb_host_devs++;
2789         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
2790             static const char * const fd_params[] = {
2791                 "vlan", "name", "fd", "sndbuf", NULL
2792             };
2793             if (check_params(chkbuf, sizeof(chkbuf), fd_params, p) < 0) {
2794                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2795                 ret = -1;
2796                 goto out;
2797             }
2798             fd = strtol(buf, NULL, 0);
2799             fcntl(fd, F_SETFL, O_NONBLOCK);
2800             s = net_tap_fd_init(vlan, device, name, fd, tap_probe_vnet_hdr(fd));
2801         } else {
2802             static const char * const tap_params[] = {
2803                 "vlan", "name", "ifname", "script", "downscript", "sndbuf", NULL
2804             };
2805             if (check_params(chkbuf, sizeof(chkbuf), tap_params, p) < 0) {
2806                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2807                 ret = -1;
2808                 goto out;
2809             }
2810             if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
2811                 ifname[0] = '\0';
2812             }
2813             if (get_param_value(setup_script, sizeof(setup_script), "script", p) == 0) {
2814                 pstrcpy(setup_script, sizeof(setup_script), DEFAULT_NETWORK_SCRIPT);
2815             }
2816             if (get_param_value(down_script, sizeof(down_script), "downscript", p) == 0) {
2817                 pstrcpy(down_script, sizeof(down_script), DEFAULT_NETWORK_DOWN_SCRIPT);
2818             }
2819             s = net_tap_init(vlan, device, name, ifname, setup_script, down_script);
2820         }
2821         if (s != NULL) {
2822             if (get_param_value(buf, sizeof(buf), "sndbuf", p)) {
2823                 tap_set_sndbuf(s, atoi(buf), mon);
2824             }
2825             ret = 0;
2826         } else {
2827             ret = -1;
2828         }
2829     } else
2830 #endif
2831     if (!strcmp(device, "socket")) {
2832         char chkbuf[64];
2833         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
2834             static const char * const fd_params[] = {
2835                 "vlan", "name", "fd", NULL
2836             };
2837             int fd;
2838             if (check_params(chkbuf, sizeof(chkbuf), fd_params, p) < 0) {
2839                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2840                 ret = -1;
2841                 goto out;
2842             }
2843             fd = strtol(buf, NULL, 0);
2844             ret = -1;
2845             if (net_socket_fd_init(vlan, device, name, fd, 1))
2846                 ret = 0;
2847         } else if (get_param_value(buf, sizeof(buf), "listen", p) > 0) {
2848             static const char * const listen_params[] = {
2849                 "vlan", "name", "listen", NULL
2850             };
2851             if (check_params(chkbuf, sizeof(chkbuf), listen_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_listen_init(vlan, device, name, buf);
2857         } else if (get_param_value(buf, sizeof(buf), "connect", p) > 0) {
2858             static const char * const connect_params[] = {
2859                 "vlan", "name", "connect", NULL
2860             };
2861             if (check_params(chkbuf, sizeof(chkbuf), connect_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_connect_init(vlan, device, name, buf);
2867         } else if (get_param_value(buf, sizeof(buf), "mcast", p) > 0) {
2868             static const char * const mcast_params[] = {
2869                 "vlan", "name", "mcast", NULL
2870             };
2871             if (check_params(chkbuf, sizeof(chkbuf), mcast_params, p) < 0) {
2872                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2873                 ret = -1;
2874                 goto out;
2875             }
2876             ret = net_socket_mcast_init(vlan, device, name, buf);
2877         } else {
2878             config_error(mon, "Unknown socket options: %s\n", p);
2879             ret = -1;
2880             goto out;
2881         }
2882         vlan->nb_host_devs++;
2883     } else
2884 #ifdef CONFIG_VDE
2885     if (!strcmp(device, "vde")) {
2886         static const char * const vde_params[] = {
2887             "vlan", "name", "sock", "port", "group", "mode", NULL
2888         };
2889         char vde_sock[1024], vde_group[512];
2890         int vde_port, vde_mode;
2891
2892         if (check_params(buf, sizeof(buf), vde_params, p) < 0) {
2893             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2894             ret = -1;
2895             goto out;
2896         }
2897         vlan->nb_host_devs++;
2898         if (get_param_value(vde_sock, sizeof(vde_sock), "sock", p) <= 0) {
2899             vde_sock[0] = '\0';
2900         }
2901         if (get_param_value(buf, sizeof(buf), "port", p) > 0) {
2902             vde_port = strtol(buf, NULL, 10);
2903         } else {
2904             vde_port = 0;
2905         }
2906         if (get_param_value(vde_group, sizeof(vde_group), "group", p) <= 0) {
2907             vde_group[0] = '\0';
2908         }
2909         if (get_param_value(buf, sizeof(buf), "mode", p) > 0) {
2910             vde_mode = strtol(buf, NULL, 8);
2911         } else {
2912             vde_mode = 0700;
2913         }
2914         ret = net_vde_init(vlan, device, name, vde_sock, vde_port, vde_group, vde_mode);
2915     } else
2916 #endif
2917     if (!strcmp(device, "dump")) {
2918         int len = 65536;
2919
2920         if (get_param_value(buf, sizeof(buf), "len", p) > 0) {
2921             len = strtol(buf, NULL, 0);
2922         }
2923         if (!get_param_value(buf, sizeof(buf), "file", p)) {
2924             snprintf(buf, sizeof(buf), "qemu-vlan%d.pcap", vlan_id);
2925         }
2926         ret = net_dump_init(mon, vlan, device, name, buf, len);
2927     } else {
2928         config_error(mon, "Unknown network device: %s\n", device);
2929         ret = -1;
2930         goto out;
2931     }
2932     if (ret < 0) {
2933         config_error(mon, "Could not initialize device '%s'\n", device);
2934     }
2935 out:
2936     qemu_free(name);
2937     return ret;
2938 }
2939
2940 void net_client_uninit(NICInfo *nd)
2941 {
2942     nd->vlan->nb_guest_devs--;
2943     nb_nics--;
2944     nd->used = 0;
2945     free((void *)nd->model);
2946 }
2947
2948 static int net_host_check_device(const char *device)
2949 {
2950     int i;
2951     const char *valid_param_list[] = { "tap", "socket", "dump"
2952 #ifdef CONFIG_SLIRP
2953                                        ,"user"
2954 #endif
2955 #ifdef CONFIG_VDE
2956                                        ,"vde"
2957 #endif
2958     };
2959     for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) {
2960         if (!strncmp(valid_param_list[i], device,
2961                      strlen(valid_param_list[i])))
2962             return 1;
2963     }
2964
2965     return 0;
2966 }
2967
2968 void net_host_device_add(Monitor *mon, const char *device, const char *opts)
2969 {
2970     if (!net_host_check_device(device)) {
2971         monitor_printf(mon, "invalid host network device %s\n", device);
2972         return;
2973     }
2974     if (net_client_init(mon, device, opts ? opts : "") < 0) {
2975         monitor_printf(mon, "adding host network device %s failed\n", device);
2976     }
2977 }
2978
2979 void net_host_device_remove(Monitor *mon, int vlan_id, const char *device)
2980 {
2981     VLANClientState *vc;
2982
2983     vc = qemu_find_vlan_client_by_name(mon, vlan_id, device);
2984     if (!vc) {
2985         return;
2986     }
2987     if (!net_host_check_device(vc->model)) {
2988         monitor_printf(mon, "invalid host network device %s\n", device);
2989         return;
2990     }
2991     qemu_del_vlan_client(vc);
2992 }
2993
2994 int net_client_parse(const char *str)
2995 {
2996     const char *p;
2997     char *q;
2998     char device[64];
2999
3000     p = str;
3001     q = device;
3002     while (*p != '\0' && *p != ',') {
3003         if ((q - device) < sizeof(device) - 1)
3004             *q++ = *p;
3005         p++;
3006     }
3007     *q = '\0';
3008     if (*p == ',')
3009         p++;
3010
3011     return net_client_init(NULL, device, p);
3012 }
3013
3014 void net_set_boot_mask(int net_boot_mask)
3015 {
3016     int i;
3017
3018     /* Only the first four NICs may be bootable */
3019     net_boot_mask = net_boot_mask & 0xF;
3020
3021     for (i = 0; i < nb_nics; i++) {
3022         if (net_boot_mask & (1 << i)) {
3023             nd_table[i].bootable = 1;
3024             net_boot_mask &= ~(1 << i);
3025         }
3026     }
3027
3028     if (net_boot_mask) {
3029         fprintf(stderr, "Cannot boot from non-existent NIC\n");
3030         exit(1);
3031     }
3032 }
3033
3034 void do_info_network(Monitor *mon)
3035 {
3036     VLANState *vlan;
3037     VLANClientState *vc;
3038
3039     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
3040         monitor_printf(mon, "VLAN %d devices:\n", vlan->id);
3041         for(vc = vlan->first_client; vc != NULL; vc = vc->next)
3042             monitor_printf(mon, "  %s: %s\n", vc->name, vc->info_str);
3043     }
3044 }
3045
3046 int do_set_link(Monitor *mon, const char *name, const char *up_or_down)
3047 {
3048     VLANState *vlan;
3049     VLANClientState *vc = NULL;
3050
3051     for (vlan = first_vlan; vlan != NULL; vlan = vlan->next)
3052         for (vc = vlan->first_client; vc != NULL; vc = vc->next)
3053             if (strcmp(vc->name, name) == 0)
3054                 goto done;
3055 done:
3056
3057     if (!vc) {
3058         monitor_printf(mon, "could not find network device '%s'", name);
3059         return 0;
3060     }
3061
3062     if (strcmp(up_or_down, "up") == 0)
3063         vc->link_down = 0;
3064     else if (strcmp(up_or_down, "down") == 0)
3065         vc->link_down = 1;
3066     else
3067         monitor_printf(mon, "invalid link status '%s'; only 'up' or 'down' "
3068                        "valid\n", up_or_down);
3069
3070     if (vc->link_status_changed)
3071         vc->link_status_changed(vc);
3072
3073     return 1;
3074 }
3075
3076 void net_cleanup(void)
3077 {
3078     VLANState *vlan;
3079
3080     /* close network clients */
3081     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
3082         VLANClientState *vc = vlan->first_client;
3083
3084         while (vc) {
3085             VLANClientState *next = vc->next;
3086
3087             qemu_del_vlan_client(vc);
3088
3089             vc = next;
3090         }
3091     }
3092 }
3093
3094 void net_client_check(void)
3095 {
3096     VLANState *vlan;
3097
3098     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
3099         if (vlan->nb_guest_devs == 0 && vlan->nb_host_devs == 0)
3100             continue;
3101         if (vlan->nb_guest_devs == 0)
3102             fprintf(stderr, "Warning: vlan %d with no nics\n", vlan->id);
3103         if (vlan->nb_host_devs == 0)
3104             fprintf(stderr,
3105                     "Warning: vlan %d is not connected to host network\n",
3106                     vlan->id);
3107     }
3108 }