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 CONFIG_BSD etc. */
  33 #include "config-host.h"
  34 /* Needed early to override system queue definitions on BSD */
  35 #include "sys-queue.h"
  36
  37 #ifndef _WIN32
  38 #include <sys/times.h>
  39 #include <sys/wait.h>
  40 #include <termios.h>
  41 #include <sys/mman.h>
  42 #include <sys/ioctl.h>
  43 #include <sys/resource.h>
  44 #include <sys/socket.h>
  45 #include <netinet/in.h>
  46 #include <net/if.h>
  47 #ifdef __NetBSD__
  48 #include <net/if_tap.h>
  49 #endif
  50 #ifdef __linux__
  51 #include <linux/if_tun.h>
  52 #endif
  53 #include <arpa/inet.h>
  54 #include <dirent.h>
  55 #include <netdb.h>
  56 #include <sys/select.h>
  57 #ifdef CONFIG_BSD
  58 #include <sys/stat.h>
  59 #if defined(__FreeBSD__) || defined(__DragonFly__)
  60 #include <libutil.h>
  61 #else
  62 #include <util.h>
  63 #endif
  64 #elif defined (__GLIBC__) && defined (__FreeBSD_kernel__)
  65 #include <freebsd/stdlib.h>
  66 #else
  67 #ifdef __linux__
  68 #include <pty.h>
  69 #include <malloc.h>
  70 #include <linux/rtc.h>
  71
  72 /* For the benefit of older linux systems which don't supply it,
  73    we use a local copy of hpet.h. */
  74 /* #include <linux/hpet.h> */
  75 #include "hpet.h"
  76
  77 #include <linux/ppdev.h>
  78 #include <linux/parport.h>
  79 #endif
  80 #ifdef __sun__
  81 #include <sys/stat.h>
  82 #include <sys/ethernet.h>
  83 #include <sys/sockio.h>
  84 #include <netinet/arp.h>
  85 #include <netinet/in.h>
  86 #include <netinet/in_systm.h>
  87 #include <netinet/ip.h>
  88 #include <netinet/ip_icmp.h> // must come after ip.h
  89 #include <netinet/udp.h>
  90 #include <netinet/tcp.h>
  91 #include <net/if.h>
  92 #include <syslog.h>
  93 #include <stropts.h>
  94 #endif
  95 #endif
  96 #endif
  97
  98 #if defined(__OpenBSD__)
  99 #include <util.h>
 100 #endif
 101
 102 #if defined(CONFIG_VDE)
 103 #include <libvdeplug.h>
 104 #endif
 105
 106 #include "qemu-common.h"
 107 #include "net.h"
 108 #include "monitor.h"
 109 #include "sysemu.h"
 110 #include "qemu-timer.h"
 111 #include "qemu-char.h"
 112 #include "audio/audio.h"
 113 #include "qemu_socket.h"
 114 #include "qemu-log.h"
 115
 116 #include "slirp/libslirp.h"
 117
 118
 119 static VLANState *first_vlan;
 120
 121 /***********************************************************/
 122 /* network device redirectors */
 123
 124 #if defined(DEBUG_NET) || defined(DEBUG_SLIRP)
 125 static void hex_dump(FILE *f, const uint8_t *buf, int size)
 126 {
 127     int len, i, j, c;
 128
 129     for(i=0;i<size;i+=16) {
 130         len = size - i;
 131         if (len > 16)
 132             len = 16;
 133         fprintf(f, "%08x ", i);
 134         for(j=0;j<16;j++) {
 135             if (j < len)
 136                 fprintf(f, " %02x", buf[i+j]);
 137             else
 138                 fprintf(f, "   ");
 139         }
 140         fprintf(f, " ");
 141         for(j=0;j<len;j++) {
 142             c = buf[i+j];
 143             if (c < ' ' || c > '~')
 144                 c = '.';
 145             fprintf(f, "%c", c);
 146         }
 147         fprintf(f, "\n");
 148     }
 149 }
 150 #endif
 151
 152 static int parse_macaddr(uint8_t *macaddr, const char *p)
 153 {
 154     int i;
 155     char *last_char;
 156     long int offset;
 157
 158     errno = 0;
 159     offset = strtol(p, &last_char, 0);
 160     if (0 == errno && '\0' == *last_char &&
 161             offset >= 0 && offset <= 0xFFFFFF) {
 162         macaddr[3] = (offset & 0xFF0000) >> 16;
 163         macaddr[4] = (offset & 0xFF00) >> 8;
 164         macaddr[5] = offset & 0xFF;
 165         return 0;
 166     } else {
 167         for(i = 0; i < 6; i++) {
 168             macaddr[i] = strtol(p, (char **)&p, 16);
 169             if (i == 5) {
 170                 if (*p != '\0')
 171                     return -1;
 172             } else {
 173                 if (*p != ':' && *p != '-')
 174                     return -1;
 175                 p++;
 176             }
 177         }
 178         return 0;
 179     }
 180
 181     return -1;
 182 }
 183
 184 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
 185 {
 186     const char *p, *p1;
 187     int len;
 188     p = *pp;
 189     p1 = strchr(p, sep);
 190     if (!p1)
 191         return -1;
 192     len = p1 - p;
 193     p1++;
 194     if (buf_size > 0) {
 195         if (len > buf_size - 1)
 196             len = buf_size - 1;
 197         memcpy(buf, p, len);
 198         buf[len] = '\0';
 199     }
 200     *pp = p1;
 201     return 0;
 202 }
 203
 204 int parse_host_src_port(struct sockaddr_in *haddr,
 205                         struct sockaddr_in *saddr,
 206                         const char *input_str)
 207 {
 208     char *str = strdup(input_str);
 209     char *host_str = str;
 210     char *src_str;
 211     const char *src_str2;
 212     char *ptr;
 213
 214     /*
 215      * Chop off any extra arguments at the end of the string which
 216      * would start with a comma, then fill in the src port information
 217      * if it was provided else use the "any address" and "any port".
 218      */
 219     if ((ptr = strchr(str,',')))
 220         *ptr = '\0';
 221
 222     if ((src_str = strchr(input_str,'@'))) {
 223         *src_str = '\0';
 224         src_str++;
 225     }
 226
 227     if (parse_host_port(haddr, host_str) < 0)
 228         goto fail;
 229
 230     src_str2 = src_str;
 231     if (!src_str || *src_str == '\0')
 232         src_str2 = ":0";
 233
 234     if (parse_host_port(saddr, src_str2) < 0)
 235         goto fail;
 236
 237     free(str);
 238     return(0);
 239
 240 fail:
 241     free(str);
 242     return -1;
 243 }
 244
 245 int parse_host_port(struct sockaddr_in *saddr, const char *str)
 246 {
 247     char buf[512];
 248     struct hostent *he;
 249     const char *p, *r;
 250     int port;
 251
 252     p = str;
 253     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 254         return -1;
 255     saddr->sin_family = AF_INET;
 256     if (buf[0] == '\0') {
 257         saddr->sin_addr.s_addr = 0;
 258     } else {
 259         if (qemu_isdigit(buf[0])) {
 260             if (!inet_aton(buf, &saddr->sin_addr))
 261                 return -1;
 262         } else {
 263             if ((he = gethostbyname(buf)) == NULL)
 264                 return - 1;
 265             saddr->sin_addr = *(struct in_addr *)he->h_addr;
 266         }
 267     }
 268     port = strtol(p, (char **)&r, 0);
 269     if (r == p)
 270         return -1;
 271     saddr->sin_port = htons(port);
 272     return 0;
 273 }
 274
 275 void qemu_format_nic_info_str(VLANClientState *vc, uint8_t macaddr[6])
 276 {
 277     snprintf(vc->info_str, sizeof(vc->info_str),
 278              "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x",
 279              vc->model,
 280              macaddr[0], macaddr[1], macaddr[2],
 281              macaddr[3], macaddr[4], macaddr[5]);
 282 }
 283
 284 static char *assign_name(VLANClientState *vc1, const char *model)
 285 {
 286     VLANState *vlan;
 287     char buf[256];
 288     int id = 0;
 289
 290     for (vlan = first_vlan; vlan; vlan = vlan->next) {
 291         VLANClientState *vc;
 292
 293         for (vc = vlan->first_client; vc; vc = vc->next)
 294             if (vc != vc1 && strcmp(vc->model, model) == 0)
 295                 id++;
 296     }
 297
 298     snprintf(buf, sizeof(buf), "%s.%d", model, id);
 299
 300     return strdup(buf);
 301 }
 302
 303 VLANClientState *qemu_new_vlan_client(VLANState *vlan,
 304                                       const char *model,
 305                                       const char *name,
 306                                       NetCanReceive *can_receive,
 307                                       NetReceive *receive,
 308                                       NetReceiveIOV *receive_iov,
 309                                       NetCleanup *cleanup,
 310                                       void *opaque)
 311 {
 312     VLANClientState *vc, **pvc;
 313     vc = qemu_mallocz(sizeof(VLANClientState));
 314     vc->model = strdup(model);
 315     if (name)
 316         vc->name = strdup(name);
 317     else
 318         vc->name = assign_name(vc, model);
 319     vc->can_receive = can_receive;
 320     vc->receive = receive;
 321     vc->receive_iov = receive_iov;
 322     vc->cleanup = cleanup;
 323     vc->opaque = opaque;
 324     vc->vlan = vlan;
 325
 326     vc->next = NULL;
 327     pvc = &vlan->first_client;
 328     while (*pvc != NULL)
 329         pvc = &(*pvc)->next;
 330     *pvc = vc;
 331     return vc;
 332 }
 333
 334 void qemu_del_vlan_client(VLANClientState *vc)
 335 {
 336     VLANClientState **pvc = &vc->vlan->first_client;
 337
 338     while (*pvc != NULL)
 339         if (*pvc == vc) {
 340             *pvc = vc->next;
 341             if (vc->cleanup) {
 342                 vc->cleanup(vc);
 343             }
 344             free(vc->name);
 345             free(vc->model);
 346             qemu_free(vc);
 347             break;
 348         } else
 349             pvc = &(*pvc)->next;
 350 }
 351
 352 VLANClientState *qemu_find_vlan_client(VLANState *vlan, void *opaque)
 353 {
 354     VLANClientState **pvc = &vlan->first_client;
 355
 356     while (*pvc != NULL)
 357         if ((*pvc)->opaque == opaque)
 358             return *pvc;
 359         else
 360             pvc = &(*pvc)->next;
 361
 362     return NULL;
 363 }
 364
 365 static VLANClientState *
 366 qemu_find_vlan_client_by_name(Monitor *mon, int vlan_id,
 367                               const char *client_str)
 368 {
 369     VLANState *vlan;
 370     VLANClientState *vc;
 371
 372     vlan = qemu_find_vlan(vlan_id, 0);
 373     if (!vlan) {
 374         monitor_printf(mon, "unknown VLAN %d\n", vlan_id);
 375         return NULL;
 376     }
 377
 378     for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
 379         if (!strcmp(vc->name, client_str)) {
 380             break;
 381         }
 382     }
 383     if (!vc) {
 384         monitor_printf(mon, "can't find device %s on VLAN %d\n",
 385                        client_str, vlan_id);
 386     }
 387
 388     return vc;
 389 }
 390
 391 int qemu_can_send_packet(VLANClientState *sender)
 392 {
 393     VLANState *vlan = sender->vlan;
 394     VLANClientState *vc;
 395
 396     for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
 397         if (vc == sender) {
 398             continue;
 399         }
 400
 401         /* no can_receive() handler, they can always receive */
 402         if (!vc->can_receive || vc->can_receive(vc)) {
 403             return 1;
 404         }
 405     }
 406     return 0;
 407 }
 408
 409 static int
 410 qemu_deliver_packet(VLANClientState *sender, const uint8_t *buf, int size)
 411 {
 412     VLANClientState *vc;
 413     int ret = -1;
 414
 415     sender->vlan->delivering = 1;
 416
 417     for (vc = sender->vlan->first_client; vc != NULL; vc = vc->next) {
 418         ssize_t len;
 419
 420         if (vc == sender) {
 421             continue;
 422         }
 423
 424         if (vc->link_down) {
 425             ret = size;
 426             continue;
 427         }
 428
 429         len = vc->receive(vc, buf, size);
 430
 431         ret = (ret >= 0) ? ret : len;
 432     }
 433
 434     sender->vlan->delivering = 0;
 435
 436     return ret;
 437 }
 438
 439 void qemu_purge_queued_packets(VLANClientState *vc)
 440 {
 441     VLANPacket *packet, *next;
 442
 443     TAILQ_FOREACH_SAFE(packet, &vc->vlan->send_queue, entry, next) {
 444         if (packet->sender == vc) {
 445             TAILQ_REMOVE(&vc->vlan->send_queue, packet, entry);
 446             qemu_free(packet);
 447         }
 448     }
 449 }
 450
 451 void qemu_flush_queued_packets(VLANClientState *vc)
 452 {
 453     while (!TAILQ_EMPTY(&vc->vlan->send_queue)) {
 454         VLANPacket *packet;
 455         int ret;
 456
 457         packet = TAILQ_FIRST(&vc->vlan->send_queue);
 458         TAILQ_REMOVE(&vc->vlan->send_queue, packet, entry);
 459
 460         ret = qemu_deliver_packet(packet->sender, packet->data, packet->size);
 461         if (ret == 0 && packet->sent_cb != NULL) {
 462             TAILQ_INSERT_HEAD(&vc->vlan->send_queue, packet, entry);
 463             break;
 464         }
 465
 466         if (packet->sent_cb)
 467             packet->sent_cb(packet->sender, ret);
 468
 469         qemu_free(packet);
 470     }
 471 }
 472
 473 static void qemu_enqueue_packet(VLANClientState *sender,
 474                                 const uint8_t *buf, int size,
 475                                 NetPacketSent *sent_cb)
 476 {
 477     VLANPacket *packet;
 478
 479     packet = qemu_malloc(sizeof(VLANPacket) + size);
 480     packet->sender = sender;
 481     packet->size = size;
 482     packet->sent_cb = sent_cb;
 483     memcpy(packet->data, buf, size);
 484
 485     TAILQ_INSERT_TAIL(&sender->vlan->send_queue, packet, entry);
 486 }
 487
 488 ssize_t qemu_send_packet_async(VLANClientState *sender,
 489                                const uint8_t *buf, int size,
 490                                NetPacketSent *sent_cb)
 491 {
 492     int ret;
 493
 494     if (sender->link_down) {
 495         return size;
 496     }
 497
 498 #ifdef DEBUG_NET
 499     printf("vlan %d send:\n", sender->vlan->id);
 500     hex_dump(stdout, buf, size);
 501 #endif
 502
 503     if (sender->vlan->delivering) {
 504         qemu_enqueue_packet(sender, buf, size, NULL);
 505         return size;
 506     }
 507
 508     ret = qemu_deliver_packet(sender, buf, size);
 509     if (ret == 0 && sent_cb != NULL) {
 510         qemu_enqueue_packet(sender, buf, size, sent_cb);
 511         return 0;
 512     }
 513
 514     qemu_flush_queued_packets(sender);
 515
 516     return ret;
 517 }
 518
 519 void qemu_send_packet(VLANClientState *vc, const uint8_t *buf, int size)
 520 {
 521     qemu_send_packet_async(vc, buf, size, NULL);
 522 }
 523
 524 static ssize_t vc_sendv_compat(VLANClientState *vc, const struct iovec *iov,
 525                                int iovcnt)
 526 {
 527     uint8_t buffer[4096];
 528     size_t offset = 0;
 529     int i;
 530
 531     for (i = 0; i < iovcnt; i++) {
 532         size_t len;
 533
 534         len = MIN(sizeof(buffer) - offset, iov[i].iov_len);
 535         memcpy(buffer + offset, iov[i].iov_base, len);
 536         offset += len;
 537     }
 538
 539     return vc->receive(vc, buffer, offset);
 540 }
 541
 542 static ssize_t calc_iov_length(const struct iovec *iov, int iovcnt)
 543 {
 544     size_t offset = 0;
 545     int i;
 546
 547     for (i = 0; i < iovcnt; i++)
 548         offset += iov[i].iov_len;
 549     return offset;
 550 }
 551
 552 static int qemu_deliver_packet_iov(VLANClientState *sender,
 553                                    const struct iovec *iov, int iovcnt)
 554 {
 555     VLANClientState *vc;
 556     int ret = -1;
 557
 558     sender->vlan->delivering = 1;
 559
 560     for (vc = sender->vlan->first_client; vc != NULL; vc = vc->next) {
 561         ssize_t len;
 562
 563         if (vc == sender) {
 564             continue;
 565         }
 566
 567         if (vc->link_down) {
 568             ret = calc_iov_length(iov, iovcnt);
 569             continue;
 570         }
 571
 572         if (vc->receive_iov) {
 573             len = vc->receive_iov(vc, iov, iovcnt);
 574         } else {
 575             len = vc_sendv_compat(vc, iov, iovcnt);
 576         }
 577
 578         ret = (ret >= 0) ? ret : len;
 579     }
 580
 581     sender->vlan->delivering = 0;
 582
 583     return ret;
 584 }
 585
 586 static ssize_t qemu_enqueue_packet_iov(VLANClientState *sender,
 587                                        const struct iovec *iov, int iovcnt,
 588                                        NetPacketSent *sent_cb)
 589 {
 590     VLANPacket *packet;
 591     size_t max_len = 0;
 592     int i;
 593
 594     max_len = calc_iov_length(iov, iovcnt);
 595
 596     packet = qemu_malloc(sizeof(VLANPacket) + max_len);
 597     packet->sender = sender;
 598     packet->sent_cb = sent_cb;
 599     packet->size = 0;
 600
 601     for (i = 0; i < iovcnt; i++) {
 602         size_t len = iov[i].iov_len;
 603
 604         memcpy(packet->data + packet->size, iov[i].iov_base, len);
 605         packet->size += len;
 606     }
 607
 608     TAILQ_INSERT_TAIL(&sender->vlan->send_queue, packet, entry);
 609
 610     return packet->size;
 611 }
 612
 613 ssize_t qemu_sendv_packet_async(VLANClientState *sender,
 614                                 const struct iovec *iov, int iovcnt,
 615                                 NetPacketSent *sent_cb)
 616 {
 617     int ret;
 618
 619     if (sender->link_down) {
 620         return calc_iov_length(iov, iovcnt);
 621     }
 622
 623     if (sender->vlan->delivering) {
 624         return qemu_enqueue_packet_iov(sender, iov, iovcnt, NULL);
 625     }
 626
 627     ret = qemu_deliver_packet_iov(sender, iov, iovcnt);
 628     if (ret == 0 && sent_cb != NULL) {
 629         qemu_enqueue_packet_iov(sender, iov, iovcnt, sent_cb);
 630         return 0;
 631     }
 632
 633     qemu_flush_queued_packets(sender);
 634
 635     return ret;
 636 }
 637
 638 ssize_t
 639 qemu_sendv_packet(VLANClientState *vc, const struct iovec *iov, int iovcnt)
 640 {
 641     return qemu_sendv_packet_async(vc, iov, iovcnt, NULL);
 642 }
 643
 644 static void config_error(Monitor *mon, const char *fmt, ...)
 645 {
 646     va_list ap;
 647
 648     va_start(ap, fmt);
 649     if (mon) {
 650         monitor_vprintf(mon, fmt, ap);
 651     } else {
 652         fprintf(stderr, "qemu: ");
 653         vfprintf(stderr, fmt, ap);
 654         exit(1);
 655     }
 656     va_end(ap);
 657 }
 658
 659 #if defined(CONFIG_SLIRP)
 660
 661 /* slirp network adapter */
 662
 663 #define SLIRP_CFG_HOSTFWD 1
 664 #define SLIRP_CFG_LEGACY  2
 665
 666 struct slirp_config_str {
 667     struct slirp_config_str *next;
 668     int flags;
 669     char str[1024];
 670     int legacy_format;
 671 };
 672
 673 typedef struct SlirpState {
 674     TAILQ_ENTRY(SlirpState) entry;
 675     VLANClientState *vc;
 676     Slirp *slirp;
 677 #ifndef _WIN32
 678     char smb_dir[128];
 679 #endif
 680 } SlirpState;
 681
 682 static struct slirp_config_str *slirp_configs;
 683 const char *legacy_tftp_prefix;
 684 const char *legacy_bootp_filename;
 685 static TAILQ_HEAD(slirp_stacks, SlirpState) slirp_stacks =
 686     TAILQ_HEAD_INITIALIZER(slirp_stacks);
 687
 688 static void slirp_hostfwd(SlirpState *s, Monitor *mon, const char *redir_str,
 689                           int legacy_format);
 690 static void slirp_guestfwd(SlirpState *s, Monitor *mon, const char *config_str,
 691                            int legacy_format);
 692
 693 #ifndef _WIN32
 694 static const char *legacy_smb_export;
 695
 696 static void slirp_smb(SlirpState *s, Monitor *mon, const char *exported_dir,
 697                       struct in_addr vserver_addr);
 698 static void slirp_smb_cleanup(SlirpState *s);
 699 #else
 700 static inline void slirp_smb_cleanup(SlirpState *s) { }
 701 #endif
 702
 703 int slirp_can_output(void *opaque)
 704 {
 705     SlirpState *s = opaque;
 706
 707     return qemu_can_send_packet(s->vc);
 708 }
 709
 710 void slirp_output(void *opaque, const uint8_t *pkt, int pkt_len)
 711 {
 712     SlirpState *s = opaque;
 713
 714 #ifdef DEBUG_SLIRP
 715     printf("slirp output:\n");
 716     hex_dump(stdout, pkt, pkt_len);
 717 #endif
 718     qemu_send_packet(s->vc, pkt, pkt_len);
 719 }
 720
 721 static ssize_t slirp_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
 722 {
 723     SlirpState *s = vc->opaque;
 724
 725 #ifdef DEBUG_SLIRP
 726     printf("slirp input:\n");
 727     hex_dump(stdout, buf, size);
 728 #endif
 729     slirp_input(s->slirp, buf, size);
 730     return size;
 731 }
 732
 733 static void net_slirp_cleanup(VLANClientState *vc)
 734 {
 735     SlirpState *s = vc->opaque;
 736
 737     slirp_cleanup(s->slirp);
 738     slirp_smb_cleanup(s);
 739     TAILQ_REMOVE(&slirp_stacks, s, entry);
 740     qemu_free(s);
 741 }
 742
 743 static int net_slirp_init(Monitor *mon, VLANState *vlan, const char *model,
 744                           const char *name, int restricted,
 745                           const char *vnetwork, const char *vhost,
 746                           const char *vhostname, const char *tftp_export,
 747                           const char *bootfile, const char *vdhcp_start,
 748                           const char *vnameserver, const char *smb_export,
 749                           const char *vsmbserver)
 750 {
 751     /* default settings according to historic slirp */
 752     struct in_addr net  = { .s_addr = htonl(0x0a000200) }; /* 10.0.2.0 */
 753     struct in_addr mask = { .s_addr = htonl(0xffffff00) }; /* 255.255.255.0 */
 754     struct in_addr host = { .s_addr = htonl(0x0a000202) }; /* 10.0.2.2 */
 755     struct in_addr dhcp = { .s_addr = htonl(0x0a00020f) }; /* 10.0.2.15 */
 756     struct in_addr dns  = { .s_addr = htonl(0x0a000203) }; /* 10.0.2.3 */
 757 #ifndef _WIN32
 758     struct in_addr smbsrv = { .s_addr = 0 };
 759 #endif
 760     SlirpState *s;
 761     char buf[20];
 762     uint32_t addr;
 763     int shift;
 764     char *end;
 765
 766     if (!tftp_export) {
 767         tftp_export = legacy_tftp_prefix;
 768     }
 769     if (!bootfile) {
 770         bootfile = legacy_bootp_filename;
 771     }
 772
 773     if (vnetwork) {
 774         if (get_str_sep(buf, sizeof(buf), &vnetwork, '/') < 0) {
 775             if (!inet_aton(vnetwork, &net)) {
 776                 return -1;
 777             }
 778             addr = ntohl(net.s_addr);
 779             if (!(addr & 0x80000000)) {
 780                 mask.s_addr = htonl(0xff000000); /* class A */
 781             } else if ((addr & 0xfff00000) == 0xac100000) {
 782                 mask.s_addr = htonl(0xfff00000); /* priv. 172.16.0.0/12 */
 783             } else if ((addr & 0xc0000000) == 0x80000000) {
 784                 mask.s_addr = htonl(0xffff0000); /* class B */
 785             } else if ((addr & 0xffff0000) == 0xc0a80000) {
 786                 mask.s_addr = htonl(0xffff0000); /* priv. 192.168.0.0/16 */
 787             } else if ((addr & 0xffff0000) == 0xc6120000) {
 788                 mask.s_addr = htonl(0xfffe0000); /* tests 198.18.0.0/15 */
 789             } else if ((addr & 0xe0000000) == 0xe0000000) {
 790                 mask.s_addr = htonl(0xffffff00); /* class C */
 791             } else {
 792                 mask.s_addr = htonl(0xfffffff0); /* multicast/reserved */
 793             }
 794         } else {
 795             if (!inet_aton(buf, &net)) {
 796                 return -1;
 797             }
 798             shift = strtol(vnetwork, &end, 10);
 799             if (*end != '\0') {
 800                 if (!inet_aton(vnetwork, &mask)) {
 801                     return -1;
 802                 }
 803             } else if (shift < 4 || shift > 32) {
 804                 return -1;
 805             } else {
 806                 mask.s_addr = htonl(0xffffffff << (32 - shift));
 807             }
 808         }
 809         net.s_addr &= mask.s_addr;
 810         host.s_addr = net.s_addr | (htonl(0x0202) & ~mask.s_addr);
 811         dhcp.s_addr = net.s_addr | (htonl(0x020f) & ~mask.s_addr);
 812         dns.s_addr  = net.s_addr | (htonl(0x0203) & ~mask.s_addr);
 813     }
 814
 815     if (vhost && !inet_aton(vhost, &host)) {
 816         return -1;
 817     }
 818     if ((host.s_addr & mask.s_addr) != net.s_addr) {
 819         return -1;
 820     }
 821
 822     if (vdhcp_start && !inet_aton(vdhcp_start, &dhcp)) {
 823         return -1;
 824     }
 825     if ((dhcp.s_addr & mask.s_addr) != net.s_addr ||
 826         dhcp.s_addr == host.s_addr || dhcp.s_addr == dns.s_addr) {
 827         return -1;
 828     }
 829
 830     if (vnameserver && !inet_aton(vnameserver, &dns)) {
 831         return -1;
 832     }
 833     if ((dns.s_addr & mask.s_addr) != net.s_addr ||
 834         dns.s_addr == host.s_addr) {
 835         return -1;
 836     }
 837
 838 #ifndef _WIN32
 839     if (vsmbserver && !inet_aton(vsmbserver, &smbsrv)) {
 840         return -1;
 841     }
 842 #endif
 843
 844     s = qemu_mallocz(sizeof(SlirpState));
 845     s->slirp = slirp_init(restricted, net, mask, host, vhostname,
 846                           tftp_export, bootfile, dhcp, dns, s);
 847     TAILQ_INSERT_TAIL(&slirp_stacks, s, entry);
 848
 849     while (slirp_configs) {
 850         struct slirp_config_str *config = slirp_configs;
 851
 852         if (config->flags & SLIRP_CFG_HOSTFWD) {
 853             slirp_hostfwd(s, mon, config->str,
 854                           config->flags & SLIRP_CFG_LEGACY);
 855         } else {
 856             slirp_guestfwd(s, mon, config->str,
 857                            config->flags & SLIRP_CFG_LEGACY);
 858         }
 859         slirp_configs = config->next;
 860         qemu_free(config);
 861     }
 862 #ifndef _WIN32
 863     if (!smb_export) {
 864         smb_export = legacy_smb_export;
 865     }
 866     if (smb_export) {
 867         slirp_smb(s, mon, smb_export, smbsrv);
 868     }
 869 #endif
 870
 871     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, slirp_receive, NULL,
 872                                  net_slirp_cleanup, s);
 873     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
 874              "net=%s, restricted=%c", inet_ntoa(net), restricted ? 'y' : 'n');
 875     return 0;
 876 }
 877
 878 static SlirpState *slirp_lookup(Monitor *mon, const char *vlan,
 879                                 const char *stack)
 880 {
 881     VLANClientState *vc;
 882
 883     if (vlan) {
 884         vc = qemu_find_vlan_client_by_name(mon, strtol(vlan, NULL, 0), stack);
 885         if (!vc) {
 886             return NULL;
 887         }
 888         if (strcmp(vc->model, "user")) {
 889             monitor_printf(mon, "invalid device specified\n");
 890             return NULL;
 891         }
 892         return vc->opaque;
 893     } else {
 894         if (TAILQ_EMPTY(&slirp_stacks)) {
 895             monitor_printf(mon, "user mode network stack not in use\n");
 896             return NULL;
 897         }
 898         return TAILQ_FIRST(&slirp_stacks);
 899     }
 900 }
 901
 902 void net_slirp_hostfwd_remove(Monitor *mon, const QDict *qdict)
 903 {
 904     struct in_addr host_addr = { .s_addr = INADDR_ANY };
 905     int host_port;
 906     char buf[256] = "";
 907     const char *src_str, *p;
 908     SlirpState *s;
 909     int is_udp = 0;
 910     int err;
 911     const char *arg1 = qdict_get_str(qdict, "arg1");
 912     const char *arg2 = qdict_get_try_str(qdict, "arg2");
 913     const char *arg3 = qdict_get_try_str(qdict, "arg3");
 914
 915     if (arg2) {
 916         s = slirp_lookup(mon, arg1, arg2);
 917         src_str = arg3;
 918     } else {
 919         s = slirp_lookup(mon, NULL, NULL);
 920         src_str = arg1;
 921     }
 922     if (!s) {
 923         return;
 924     }
 925
 926     if (!src_str || !src_str[0])
 927         goto fail_syntax;
 928
 929     p = src_str;
 930     get_str_sep(buf, sizeof(buf), &p, ':');
 931
 932     if (!strcmp(buf, "tcp") || buf[0] == '\0') {
 933         is_udp = 0;
 934     } else if (!strcmp(buf, "udp")) {
 935         is_udp = 1;
 936     } else {
 937         goto fail_syntax;
 938     }
 939
 940     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 941         goto fail_syntax;
 942     }
 943     if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
 944         goto fail_syntax;
 945     }
 946
 947     host_port = atoi(p);
 948
 949     err = slirp_remove_hostfwd(TAILQ_FIRST(&slirp_stacks)->slirp, is_udp,
 950                                host_addr, host_port);
 951
 952     monitor_printf(mon, "host forwarding rule for %s %s\n", src_str,
 953                    err ? "removed" : "not found");
 954     return;
 955
 956  fail_syntax:
 957     monitor_printf(mon, "invalid format\n");
 958 }
 959
 960 static void slirp_hostfwd(SlirpState *s, Monitor *mon, const char *redir_str,
 961                           int legacy_format)
 962 {
 963     struct in_addr host_addr = { .s_addr = INADDR_ANY };
 964     struct in_addr guest_addr = { .s_addr = 0 };
 965     int host_port, guest_port;
 966     const char *p;
 967     char buf[256];
 968     int is_udp;
 969     char *end;
 970
 971     p = redir_str;
 972     if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 973         goto fail_syntax;
 974     }
 975     if (!strcmp(buf, "tcp") || buf[0] == '\0') {
 976         is_udp = 0;
 977     } else if (!strcmp(buf, "udp")) {
 978         is_udp = 1;
 979     } else {
 980         goto fail_syntax;
 981     }
 982
 983     if (!legacy_format) {
 984         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 985             goto fail_syntax;
 986         }
 987         if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
 988             goto fail_syntax;
 989         }
 990     }
 991
 992     if (get_str_sep(buf, sizeof(buf), &p, legacy_format ? ':' : '-') < 0) {
 993         goto fail_syntax;
 994     }
 995     host_port = strtol(buf, &end, 0);
 996     if (*end != '\0' || host_port < 1 || host_port > 65535) {
 997         goto fail_syntax;
 998     }
 999
1000     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1001         goto fail_syntax;
1002     }
1003     if (buf[0] != '\0' && !inet_aton(buf, &guest_addr)) {
1004         goto fail_syntax;
1005     }
1006
1007     guest_port = strtol(p, &end, 0);
1008     if (*end != '\0' || guest_port < 1 || guest_port > 65535) {
1009         goto fail_syntax;
1010     }
1011
1012     if (slirp_add_hostfwd(s->slirp, is_udp, host_addr, host_port, guest_addr,
1013                           guest_port) < 0) {
1014         config_error(mon, "could not set up host forwarding rule '%s'\n",
1015                      redir_str);
1016     }
1017     return;
1018
1019  fail_syntax:
1020     config_error(mon, "invalid host forwarding rule '%s'\n", redir_str);
1021 }
1022
1023 void net_slirp_hostfwd_add(Monitor *mon, const QDict *qdict)
1024 {
1025     const char *redir_str;
1026     SlirpState *s;
1027     const char *arg1 = qdict_get_str(qdict, "arg1");
1028     const char *arg2 = qdict_get_try_str(qdict, "arg2");
1029     const char *arg3 = qdict_get_try_str(qdict, "arg3");
1030
1031     if (arg2) {
1032         s = slirp_lookup(mon, arg1, arg2);
1033         redir_str = arg3;
1034     } else {
1035         s = slirp_lookup(mon, NULL, NULL);
1036         redir_str = arg1;
1037     }
1038     if (s) {
1039         slirp_hostfwd(s, mon, redir_str, 0);
1040     }
1041
1042 }
1043
1044 void net_slirp_redir(const char *redir_str)
1045 {
1046     struct slirp_config_str *config;
1047
1048     if (TAILQ_EMPTY(&slirp_stacks)) {
1049         config = qemu_malloc(sizeof(*config));
1050         pstrcpy(config->str, sizeof(config->str), redir_str);
1051         config->flags = SLIRP_CFG_HOSTFWD | SLIRP_CFG_LEGACY;
1052         config->next = slirp_configs;
1053         slirp_configs = config;
1054         return;
1055     }
1056
1057     slirp_hostfwd(TAILQ_FIRST(&slirp_stacks), NULL, redir_str, 1);
1058 }
1059
1060 #ifndef _WIN32
1061
1062 /* automatic user mode samba server configuration */
1063 static void slirp_smb_cleanup(SlirpState *s)
1064 {
1065     char cmd[128];
1066
1067     if (s->smb_dir[0] != '\0') {
1068         snprintf(cmd, sizeof(cmd), "rm -rf %s", s->smb_dir);
1069         system(cmd);
1070         s->smb_dir[0] = '\0';
1071     }
1072 }
1073
1074 static void slirp_smb(SlirpState* s, Monitor *mon, const char *exported_dir,
1075                       struct in_addr vserver_addr)
1076 {
1077     static int instance;
1078     char smb_conf[128];
1079     char smb_cmdline[128];
1080     FILE *f;
1081
1082     snprintf(s->smb_dir, sizeof(s->smb_dir), "/tmp/qemu-smb.%ld-%d",
1083              (long)getpid(), instance++);
1084     if (mkdir(s->smb_dir, 0700) < 0) {
1085         config_error(mon, "could not create samba server dir '%s'\n",
1086                      s->smb_dir);
1087         return;
1088     }
1089     snprintf(smb_conf, sizeof(smb_conf), "%s/%s", s->smb_dir, "smb.conf");
1090
1091     f = fopen(smb_conf, "w");
1092     if (!f) {
1093         slirp_smb_cleanup(s);
1094         config_error(mon, "could not create samba server "
1095                      "configuration file '%s'\n", smb_conf);
1096         return;
1097     }
1098     fprintf(f,
1099             "[global]\n"
1100             "private dir=%s\n"
1101             "smb ports=0\n"
1102             "socket address=127.0.0.1\n"
1103             "pid directory=%s\n"
1104             "lock directory=%s\n"
1105             "log file=%s/log.smbd\n"
1106             "smb passwd file=%s/smbpasswd\n"
1107             "security = share\n"
1108             "[qemu]\n"
1109             "path=%s\n"
1110             "read only=no\n"
1111             "guest ok=yes\n",
1112             s->smb_dir,
1113             s->smb_dir,
1114             s->smb_dir,
1115             s->smb_dir,
1116             s->smb_dir,
1117             exported_dir
1118             );
1119     fclose(f);
1120
1121     snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -s %s",
1122              SMBD_COMMAND, smb_conf);
1123
1124     if (slirp_add_exec(s->slirp, 0, smb_cmdline, &vserver_addr, 139) < 0) {
1125         slirp_smb_cleanup(s);
1126         config_error(mon, "conflicting/invalid smbserver address\n");
1127     }
1128 }
1129
1130 /* automatic user mode samba server configuration (legacy interface) */
1131 void net_slirp_smb(const char *exported_dir)
1132 {
1133     struct in_addr vserver_addr = { .s_addr = 0 };
1134
1135     if (legacy_smb_export) {
1136         fprintf(stderr, "-smb given twice\n");
1137         exit(1);
1138     }
1139     legacy_smb_export = exported_dir;
1140     if (!TAILQ_EMPTY(&slirp_stacks)) {
1141         slirp_smb(TAILQ_FIRST(&slirp_stacks), NULL, exported_dir,
1142                   vserver_addr);
1143     }
1144 }
1145
1146 #endif /* !defined(_WIN32) */
1147
1148 struct GuestFwd {
1149     CharDriverState *hd;
1150     struct in_addr server;
1151     int port;
1152     Slirp *slirp;
1153 };
1154
1155 static int guestfwd_can_read(void *opaque)
1156 {
1157     struct GuestFwd *fwd = opaque;
1158     return slirp_socket_can_recv(fwd->slirp, fwd->server, fwd->port);
1159 }
1160
1161 static void guestfwd_read(void *opaque, const uint8_t *buf, int size)
1162 {
1163     struct GuestFwd *fwd = opaque;
1164     slirp_socket_recv(fwd->slirp, fwd->server, fwd->port, buf, size);
1165 }
1166
1167 static void slirp_guestfwd(SlirpState *s, Monitor *mon, const char *config_str,
1168                            int legacy_format)
1169 {
1170     struct in_addr server = { .s_addr = 0 };
1171     struct GuestFwd *fwd;
1172     const char *p;
1173     char buf[128];
1174     char *end;
1175     int port;
1176
1177     p = config_str;
1178     if (legacy_format) {
1179         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1180             goto fail_syntax;
1181         }
1182     } else {
1183         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1184             goto fail_syntax;
1185         }
1186         if (strcmp(buf, "tcp") && buf[0] != '\0') {
1187             goto fail_syntax;
1188         }
1189         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1190             goto fail_syntax;
1191         }
1192         if (buf[0] != '\0' && !inet_aton(buf, &server)) {
1193             goto fail_syntax;
1194         }
1195         if (get_str_sep(buf, sizeof(buf), &p, '-') < 0) {
1196             goto fail_syntax;
1197         }
1198     }
1199     port = strtol(buf, &end, 10);
1200     if (*end != '\0' || port < 1 || port > 65535) {
1201         goto fail_syntax;
1202     }
1203
1204     fwd = qemu_malloc(sizeof(struct GuestFwd));
1205     snprintf(buf, sizeof(buf), "guestfwd.tcp:%d", port);
1206     fwd->hd = qemu_chr_open(buf, p, NULL);
1207     if (!fwd->hd) {
1208         config_error(mon, "could not open guest forwarding device '%s'\n",
1209                      buf);
1210         qemu_free(fwd);
1211         return;
1212     }
1213
1214     if (slirp_add_exec(s->slirp, 3, fwd->hd, &server, port) < 0) {
1215         config_error(mon, "conflicting/invalid host:port in guest forwarding "
1216                      "rule '%s'\n", config_str);
1217         qemu_free(fwd);
1218         return;
1219     }
1220     fwd->server = server;
1221     fwd->port = port;
1222     fwd->slirp = s->slirp;
1223
1224     qemu_chr_add_handlers(fwd->hd, guestfwd_can_read, guestfwd_read,
1225                           NULL, fwd);
1226     return;
1227
1228  fail_syntax:
1229     config_error(mon, "invalid guest forwarding rule '%s'\n", config_str);
1230 }
1231
1232 void do_info_usernet(Monitor *mon)
1233 {
1234     SlirpState *s;
1235
1236     TAILQ_FOREACH(s, &slirp_stacks, entry) {
1237         monitor_printf(mon, "VLAN %d (%s):\n", s->vc->vlan->id, s->vc->name);
1238         slirp_connection_info(s->slirp, mon);
1239     }
1240 }
1241
1242 #endif /* CONFIG_SLIRP */
1243
1244 #if !defined(_WIN32)
1245
1246 typedef struct TAPState {
1247     VLANClientState *vc;
1248     int fd;
1249     char down_script[1024];
1250     char down_script_arg[128];
1251     uint8_t buf[4096];
1252     unsigned int read_poll : 1;
1253     unsigned int write_poll : 1;
1254 } TAPState;
1255
1256 static int launch_script(const char *setup_script, const char *ifname, int fd);
1257
1258 static int tap_can_send(void *opaque);
1259 static void tap_send(void *opaque);
1260 static void tap_writable(void *opaque);
1261
1262 static void tap_update_fd_handler(TAPState *s)
1263 {
1264     qemu_set_fd_handler2(s->fd,
1265                          s->read_poll  ? tap_can_send : NULL,
1266                          s->read_poll  ? tap_send     : NULL,
1267                          s->write_poll ? tap_writable : NULL,
1268                          s);
1269 }
1270
1271 static void tap_read_poll(TAPState *s, int enable)
1272 {
1273     s->read_poll = !!enable;
1274     tap_update_fd_handler(s);
1275 }
1276
1277 static void tap_write_poll(TAPState *s, int enable)
1278 {
1279     s->write_poll = !!enable;
1280     tap_update_fd_handler(s);
1281 }
1282
1283 static void tap_writable(void *opaque)
1284 {
1285     TAPState *s = opaque;
1286
1287     tap_write_poll(s, 0);
1288
1289     qemu_flush_queued_packets(s->vc);
1290 }
1291
1292 static ssize_t tap_receive_iov(VLANClientState *vc, const struct iovec *iov,
1293                                int iovcnt)
1294 {
1295     TAPState *s = vc->opaque;
1296     ssize_t len;
1297
1298     do {
1299         len = writev(s->fd, iov, iovcnt);
1300     } while (len == -1 && errno == EINTR);
1301
1302     if (len == -1 && errno == EAGAIN) {
1303         tap_write_poll(s, 1);
1304         return 0;
1305     }
1306
1307     return len;
1308 }
1309
1310 static ssize_t tap_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1311 {
1312     TAPState *s = vc->opaque;
1313     ssize_t len;
1314
1315     do {
1316         len = write(s->fd, buf, size);
1317     } while (len == -1 && (errno == EINTR || errno == EAGAIN));
1318
1319     return len;
1320 }
1321
1322 static int tap_can_send(void *opaque)
1323 {
1324     TAPState *s = opaque;
1325
1326     return qemu_can_send_packet(s->vc);
1327 }
1328
1329 #ifdef __sun__
1330 static ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
1331 {
1332     struct strbuf sbuf;
1333     int f = 0;
1334
1335     sbuf.maxlen = maxlen;
1336     sbuf.buf = (char *)buf;
1337
1338     return getmsg(tapfd, NULL, &sbuf, &f) >= 0 ? sbuf.len : -1;
1339 }
1340 #else
1341 static ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
1342 {
1343     return read(tapfd, buf, maxlen);
1344 }
1345 #endif
1346
1347 static void tap_send_completed(VLANClientState *vc, ssize_t len)
1348 {
1349     TAPState *s = vc->opaque;
1350     tap_read_poll(s, 1);
1351 }
1352
1353 static void tap_send(void *opaque)
1354 {
1355     TAPState *s = opaque;
1356     int size;
1357
1358     do {
1359         size = tap_read_packet(s->fd, s->buf, sizeof(s->buf));
1360         if (size <= 0) {
1361             break;
1362         }
1363
1364         size = qemu_send_packet_async(s->vc, s->buf, size, tap_send_completed);
1365         if (size == 0) {
1366             tap_read_poll(s, 0);
1367         }
1368     } while (size > 0);
1369 }
1370
1371 #ifdef TUNSETSNDBUF
1372 /* sndbuf should be set to a value lower than the tx queue
1373  * capacity of any destination network interface.
1374  * Ethernet NICs generally have txqueuelen=1000, so 1Mb is
1375  * a good default, given a 1500 byte MTU.
1376  */
1377 #define TAP_DEFAULT_SNDBUF 1024*1024
1378
1379 static void tap_set_sndbuf(TAPState *s, const char *sndbuf_str, Monitor *mon)
1380 {
1381     int sndbuf = TAP_DEFAULT_SNDBUF;
1382
1383     if (sndbuf_str) {
1384         sndbuf = atoi(sndbuf_str);
1385     }
1386
1387     if (!sndbuf) {
1388         sndbuf = INT_MAX;
1389     }
1390
1391     if (ioctl(s->fd, TUNSETSNDBUF, &sndbuf) == -1 && sndbuf_str) {
1392         config_error(mon, "TUNSETSNDBUF ioctl failed: %s\n",
1393                      strerror(errno));
1394     }
1395 }
1396 #else
1397 static void tap_set_sndbuf(TAPState *s, const char *sndbuf_str, Monitor *mon)
1398 {
1399     if (sndbuf_str) {
1400         config_error(mon, "No '-net tap,sndbuf=<nbytes>' support available\n");
1401     }
1402 }
1403 #endif /* TUNSETSNDBUF */
1404
1405 static void tap_cleanup(VLANClientState *vc)
1406 {
1407     TAPState *s = vc->opaque;
1408
1409     qemu_purge_queued_packets(vc);
1410
1411     if (s->down_script[0])
1412         launch_script(s->down_script, s->down_script_arg, s->fd);
1413
1414     tap_read_poll(s, 0);
1415     tap_write_poll(s, 0);
1416     close(s->fd);
1417     qemu_free(s);
1418 }
1419
1420 /* fd support */
1421
1422 static TAPState *net_tap_fd_init(VLANState *vlan,
1423                                  const char *model,
1424                                  const char *name,
1425                                  int fd)
1426 {
1427     TAPState *s;
1428
1429     s = qemu_mallocz(sizeof(TAPState));
1430     s->fd = fd;
1431     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, tap_receive,
1432                                  tap_receive_iov, tap_cleanup, s);
1433     tap_read_poll(s, 1);
1434     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "fd=%d", fd);
1435     return s;
1436 }
1437
1438 #if defined (CONFIG_BSD) || defined (__FreeBSD_kernel__)
1439 static int tap_open(char *ifname, int ifname_size)
1440 {
1441     int fd;
1442     char *dev;
1443     struct stat s;
1444
1445     TFR(fd = open("/dev/tap", O_RDWR));
1446     if (fd < 0) {
1447         fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n");
1448         return -1;
1449     }
1450
1451     fstat(fd, &s);
1452     dev = devname(s.st_rdev, S_IFCHR);
1453     pstrcpy(ifname, ifname_size, dev);
1454
1455     fcntl(fd, F_SETFL, O_NONBLOCK);
1456     return fd;
1457 }
1458 #elif defined(__sun__)
1459 #define TUNNEWPPA       (('T'<<16) | 0x0001)
1460 /*
1461  * Allocate TAP device, returns opened fd.
1462  * Stores dev name in the first arg(must be large enough).
1463  */
1464 static int tap_alloc(char *dev, size_t dev_size)
1465 {
1466     int tap_fd, if_fd, ppa = -1;
1467     static int ip_fd = 0;
1468     char *ptr;
1469
1470     static int arp_fd = 0;
1471     int ip_muxid, arp_muxid;
1472     struct strioctl  strioc_if, strioc_ppa;
1473     int link_type = I_PLINK;;
1474     struct lifreq ifr;
1475     char actual_name[32] = "";
1476
1477     memset(&ifr, 0x0, sizeof(ifr));
1478
1479     if( *dev ){
1480        ptr = dev;
1481        while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
1482        ppa = atoi(ptr);
1483     }
1484
1485     /* Check if IP device was opened */
1486     if( ip_fd )
1487        close(ip_fd);
1488
1489     TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
1490     if (ip_fd < 0) {
1491        syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)");
1492        return -1;
1493     }
1494
1495     TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
1496     if (tap_fd < 0) {
1497        syslog(LOG_ERR, "Can't open /dev/tap");
1498        return -1;
1499     }
1500
1501     /* Assign a new PPA and get its unit number. */
1502     strioc_ppa.ic_cmd = TUNNEWPPA;
1503     strioc_ppa.ic_timout = 0;
1504     strioc_ppa.ic_len = sizeof(ppa);
1505     strioc_ppa.ic_dp = (char *)&ppa;
1506     if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
1507        syslog (LOG_ERR, "Can't assign new interface");
1508
1509     TFR(if_fd = open("/dev/tap", O_RDWR, 0));
1510     if (if_fd < 0) {
1511        syslog(LOG_ERR, "Can't open /dev/tap (2)");
1512        return -1;
1513     }
1514     if(ioctl(if_fd, I_PUSH, "ip") < 0){
1515        syslog(LOG_ERR, "Can't push IP module");
1516        return -1;
1517     }
1518
1519     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
1520         syslog(LOG_ERR, "Can't get flags\n");
1521
1522     snprintf (actual_name, 32, "tap%d", ppa);
1523     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
1524
1525     ifr.lifr_ppa = ppa;
1526     /* Assign ppa according to the unit number returned by tun device */
1527
1528     if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
1529         syslog (LOG_ERR, "Can't set PPA %d", ppa);
1530     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
1531         syslog (LOG_ERR, "Can't get flags\n");
1532     /* Push arp module to if_fd */
1533     if (ioctl (if_fd, I_PUSH, "arp") < 0)
1534         syslog (LOG_ERR, "Can't push ARP module (2)");
1535
1536     /* Push arp module to ip_fd */
1537     if (ioctl (ip_fd, I_POP, NULL) < 0)
1538         syslog (LOG_ERR, "I_POP failed\n");
1539     if (ioctl (ip_fd, I_PUSH, "arp") < 0)
1540         syslog (LOG_ERR, "Can't push ARP module (3)\n");
1541     /* Open arp_fd */
1542     TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
1543     if (arp_fd < 0)
1544        syslog (LOG_ERR, "Can't open %s\n", "/dev/tap");
1545
1546     /* Set ifname to arp */
1547     strioc_if.ic_cmd = SIOCSLIFNAME;
1548     strioc_if.ic_timout = 0;
1549     strioc_if.ic_len = sizeof(ifr);
1550     strioc_if.ic_dp = (char *)&ifr;
1551     if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
1552         syslog (LOG_ERR, "Can't set ifname to arp\n");
1553     }
1554
1555     if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
1556        syslog(LOG_ERR, "Can't link TAP device to IP");
1557        return -1;
1558     }
1559
1560     if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
1561         syslog (LOG_ERR, "Can't link TAP device to ARP");
1562
1563     close (if_fd);
1564
1565     memset(&ifr, 0x0, sizeof(ifr));
1566     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
1567     ifr.lifr_ip_muxid  = ip_muxid;
1568     ifr.lifr_arp_muxid = arp_muxid;
1569
1570     if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
1571     {
1572       ioctl (ip_fd, I_PUNLINK , arp_muxid);
1573       ioctl (ip_fd, I_PUNLINK, ip_muxid);
1574       syslog (LOG_ERR, "Can't set multiplexor id");
1575     }
1576
1577     snprintf(dev, dev_size, "tap%d", ppa);
1578     return tap_fd;
1579 }
1580
1581 static int tap_open(char *ifname, int ifname_size)
1582 {
1583     char  dev[10]="";
1584     int fd;
1585     if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){
1586        fprintf(stderr, "Cannot allocate TAP device\n");
1587        return -1;
1588     }
1589     pstrcpy(ifname, ifname_size, dev);
1590     fcntl(fd, F_SETFL, O_NONBLOCK);
1591     return fd;
1592 }
1593 #elif defined (_AIX)
1594 static int tap_open(char *ifname, int ifname_size)
1595 {
1596     fprintf (stderr, "no tap on AIX\n");
1597     return -1;
1598 }
1599 #else
1600 static int tap_open(char *ifname, int ifname_size)
1601 {
1602     struct ifreq ifr;
1603     int fd, ret;
1604
1605     TFR(fd = open("/dev/net/tun", O_RDWR));
1606     if (fd < 0) {
1607         fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n");
1608         return -1;
1609     }
1610     memset(&ifr, 0, sizeof(ifr));
1611     ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
1612     if (ifname[0] != '\0')
1613         pstrcpy(ifr.ifr_name, IFNAMSIZ, ifname);
1614     else
1615         pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d");
1616     ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
1617     if (ret != 0) {
1618         fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n");
1619         close(fd);
1620         return -1;
1621     }
1622     pstrcpy(ifname, ifname_size, ifr.ifr_name);
1623     fcntl(fd, F_SETFL, O_NONBLOCK);
1624     return fd;
1625 }
1626 #endif
1627
1628 static int launch_script(const char *setup_script, const char *ifname, int fd)
1629 {
1630     sigset_t oldmask, mask;
1631     int pid, status;
1632     char *args[3];
1633     char **parg;
1634
1635     sigemptyset(&mask);
1636     sigaddset(&mask, SIGCHLD);
1637     sigprocmask(SIG_BLOCK, &mask, &oldmask);
1638
1639     /* try to launch network script */
1640     pid = fork();
1641     if (pid == 0) {
1642         int open_max = sysconf(_SC_OPEN_MAX), i;
1643
1644         for (i = 0; i < open_max; i++) {
1645             if (i != STDIN_FILENO &&
1646                 i != STDOUT_FILENO &&
1647                 i != STDERR_FILENO &&
1648                 i != fd) {
1649                 close(i);
1650             }
1651         }
1652         parg = args;
1653         *parg++ = (char *)setup_script;
1654         *parg++ = (char *)ifname;
1655         *parg++ = NULL;
1656         execv(setup_script, args);
1657         _exit(1);
1658     } else if (pid > 0) {
1659         while (waitpid(pid, &status, 0) != pid) {
1660             /* loop */
1661         }
1662         sigprocmask(SIG_SETMASK, &oldmask, NULL);
1663
1664         if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
1665             return 0;
1666         }
1667     }
1668     fprintf(stderr, "%s: could not launch network script\n", setup_script);
1669     return -1;
1670 }
1671
1672 static TAPState *net_tap_init(VLANState *vlan, const char *model,
1673                               const char *name, const char *ifname1,
1674                               const char *setup_script, const char *down_script)
1675 {
1676     TAPState *s;
1677     int fd;
1678     char ifname[128];
1679
1680     if (ifname1 != NULL)
1681         pstrcpy(ifname, sizeof(ifname), ifname1);
1682     else
1683         ifname[0] = '\0';
1684     TFR(fd = tap_open(ifname, sizeof(ifname)));
1685     if (fd < 0)
1686         return NULL;
1687
1688     if (!setup_script || !strcmp(setup_script, "no"))
1689         setup_script = "";
1690     if (setup_script[0] != '\0' &&
1691         launch_script(setup_script, ifname, fd)) {
1692         return NULL;
1693     }
1694     s = net_tap_fd_init(vlan, model, name, fd);
1695     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1696              "ifname=%s,script=%s,downscript=%s",
1697              ifname, setup_script, down_script);
1698     if (down_script && strcmp(down_script, "no")) {
1699         snprintf(s->down_script, sizeof(s->down_script), "%s", down_script);
1700         snprintf(s->down_script_arg, sizeof(s->down_script_arg), "%s", ifname);
1701     }
1702     return s;
1703 }
1704
1705 #endif /* !_WIN32 */
1706
1707 #if defined(CONFIG_VDE)
1708 typedef struct VDEState {
1709     VLANClientState *vc;
1710     VDECONN *vde;
1711 } VDEState;
1712
1713 static void vde_to_qemu(void *opaque)
1714 {
1715     VDEState *s = opaque;
1716     uint8_t buf[4096];
1717     int size;
1718
1719     size = vde_recv(s->vde, (char *)buf, sizeof(buf), 0);
1720     if (size > 0) {
1721         qemu_send_packet(s->vc, buf, size);
1722     }
1723 }
1724
1725 static ssize_t vde_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1726 {
1727     VDEState *s = vc->opaque;
1728     ssize_t ret;
1729
1730     do {
1731       ret = vde_send(s->vde, (const char *)buf, size, 0);
1732     } while (ret < 0 && errno == EINTR);
1733
1734     return ret;
1735 }
1736
1737 static void vde_cleanup(VLANClientState *vc)
1738 {
1739     VDEState *s = vc->opaque;
1740     qemu_set_fd_handler(vde_datafd(s->vde), NULL, NULL, NULL);
1741     vde_close(s->vde);
1742     qemu_free(s);
1743 }
1744
1745 static int net_vde_init(VLANState *vlan, const char *model,
1746                         const char *name, const char *sock,
1747                         int port, const char *group, int mode)
1748 {
1749     VDEState *s;
1750     char *init_group = strlen(group) ? (char *)group : NULL;
1751     char *init_sock = strlen(sock) ? (char *)sock : NULL;
1752
1753     struct vde_open_args args = {
1754         .port = port,
1755         .group = init_group,
1756         .mode = mode,
1757     };
1758
1759     s = qemu_mallocz(sizeof(VDEState));
1760     s->vde = vde_open(init_sock, (char *)"QEMU", &args);
1761     if (!s->vde){
1762         free(s);
1763         return -1;
1764     }
1765     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, vde_receive,
1766                                  NULL, vde_cleanup, s);
1767     qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
1768     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "sock=%s,fd=%d",
1769              sock, vde_datafd(s->vde));
1770     return 0;
1771 }
1772 #endif
1773
1774 /* network connection */
1775 typedef struct NetSocketState {
1776     VLANClientState *vc;
1777     int fd;
1778     int state; /* 0 = getting length, 1 = getting data */
1779     unsigned int index;
1780     unsigned int packet_len;
1781     uint8_t buf[4096];
1782     struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
1783 } NetSocketState;
1784
1785 typedef struct NetSocketListenState {
1786     VLANState *vlan;
1787     char *model;
1788     char *name;
1789     int fd;
1790 } NetSocketListenState;
1791
1792 /* XXX: we consider we can send the whole packet without blocking */
1793 static ssize_t net_socket_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1794 {
1795     NetSocketState *s = vc->opaque;
1796     uint32_t len;
1797     len = htonl(size);
1798
1799     send_all(s->fd, (const uint8_t *)&len, sizeof(len));
1800     return send_all(s->fd, buf, size);
1801 }
1802
1803 static ssize_t net_socket_receive_dgram(VLANClientState *vc, const uint8_t *buf, size_t size)
1804 {
1805     NetSocketState *s = vc->opaque;
1806
1807     return sendto(s->fd, (const void *)buf, size, 0,
1808                   (struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst));
1809 }
1810
1811 static void net_socket_send(void *opaque)
1812 {
1813     NetSocketState *s = opaque;
1814     int size, err;
1815     unsigned l;
1816     uint8_t buf1[4096];
1817     const uint8_t *buf;
1818
1819     size = recv(s->fd, (void *)buf1, sizeof(buf1), 0);
1820     if (size < 0) {
1821         err = socket_error();
1822         if (err != EWOULDBLOCK)
1823             goto eoc;
1824     } else if (size == 0) {
1825         /* end of connection */
1826     eoc:
1827         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1828         closesocket(s->fd);
1829         return;
1830     }
1831     buf = buf1;
1832     while (size > 0) {
1833         /* reassemble a packet from the network */
1834         switch(s->state) {
1835         case 0:
1836             l = 4 - s->index;
1837             if (l > size)
1838                 l = size;
1839             memcpy(s->buf + s->index, buf, l);
1840             buf += l;
1841             size -= l;
1842             s->index += l;
1843             if (s->index == 4) {
1844                 /* got length */
1845                 s->packet_len = ntohl(*(uint32_t *)s->buf);
1846                 s->index = 0;
1847                 s->state = 1;
1848             }
1849             break;
1850         case 1:
1851             l = s->packet_len - s->index;
1852             if (l > size)
1853                 l = size;
1854             if (s->index + l <= sizeof(s->buf)) {
1855                 memcpy(s->buf + s->index, buf, l);
1856             } else {
1857                 fprintf(stderr, "serious error: oversized packet received,"
1858                     "connection terminated.\n");
1859                 s->state = 0;
1860                 goto eoc;
1861             }
1862
1863             s->index += l;
1864             buf += l;
1865             size -= l;
1866             if (s->index >= s->packet_len) {
1867                 qemu_send_packet(s->vc, s->buf, s->packet_len);
1868                 s->index = 0;
1869                 s->state = 0;
1870             }
1871             break;
1872         }
1873     }
1874 }
1875
1876 static void net_socket_send_dgram(void *opaque)
1877 {
1878     NetSocketState *s = opaque;
1879     int size;
1880
1881     size = recv(s->fd, (void *)s->buf, sizeof(s->buf), 0);
1882     if (size < 0)
1883         return;
1884     if (size == 0) {
1885         /* end of connection */
1886         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1887         return;
1888     }
1889     qemu_send_packet(s->vc, s->buf, size);
1890 }
1891
1892 static int net_socket_mcast_create(struct sockaddr_in *mcastaddr)
1893 {
1894     struct ip_mreq imr;
1895     int fd;
1896     int val, ret;
1897     if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
1898         fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n",
1899                 inet_ntoa(mcastaddr->sin_addr),
1900                 (int)ntohl(mcastaddr->sin_addr.s_addr));
1901         return -1;
1902
1903     }
1904     fd = socket(PF_INET, SOCK_DGRAM, 0);
1905     if (fd < 0) {
1906         perror("socket(PF_INET, SOCK_DGRAM)");
1907         return -1;
1908     }
1909
1910     val = 1;
1911     ret=setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
1912                    (const char *)&val, sizeof(val));
1913     if (ret < 0) {
1914         perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
1915         goto fail;
1916     }
1917
1918     ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
1919     if (ret < 0) {
1920         perror("bind");
1921         goto fail;
1922     }
1923
1924     /* Add host to multicast group */
1925     imr.imr_multiaddr = mcastaddr->sin_addr;
1926     imr.imr_interface.s_addr = htonl(INADDR_ANY);
1927
1928     ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1929                      (const char *)&imr, sizeof(struct ip_mreq));
1930     if (ret < 0) {
1931         perror("setsockopt(IP_ADD_MEMBERSHIP)");
1932         goto fail;
1933     }
1934
1935     /* Force mcast msgs to loopback (eg. several QEMUs in same host */
1936     val = 1;
1937     ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1938                    (const char *)&val, sizeof(val));
1939     if (ret < 0) {
1940         perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
1941         goto fail;
1942     }
1943
1944     socket_set_nonblock(fd);
1945     return fd;
1946 fail:
1947     if (fd >= 0)
1948         closesocket(fd);
1949     return -1;
1950 }
1951
1952 static void net_socket_cleanup(VLANClientState *vc)
1953 {
1954     NetSocketState *s = vc->opaque;
1955     qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1956     close(s->fd);
1957     qemu_free(s);
1958 }
1959
1960 static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
1961                                                 const char *model,
1962                                                 const char *name,
1963                                                 int fd, int is_connected)
1964 {
1965     struct sockaddr_in saddr;
1966     int newfd;
1967     socklen_t saddr_len;
1968     NetSocketState *s;
1969
1970     /* fd passed: multicast: "learn" dgram_dst address from bound address and save it
1971      * Because this may be "shared" socket from a "master" process, datagrams would be recv()
1972      * by ONLY ONE process: we must "clone" this dgram socket --jjo
1973      */
1974
1975     if (is_connected) {
1976         if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
1977             /* must be bound */
1978             if (saddr.sin_addr.s_addr==0) {
1979                 fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, cannot setup multicast dst addr\n",
1980                         fd);
1981                 return NULL;
1982             }
1983             /* clone dgram socket */
1984             newfd = net_socket_mcast_create(&saddr);
1985             if (newfd < 0) {
1986                 /* error already reported by net_socket_mcast_create() */
1987                 close(fd);
1988                 return NULL;
1989             }
1990             /* clone newfd to fd, close newfd */
1991             dup2(newfd, fd);
1992             close(newfd);
1993
1994         } else {
1995             fprintf(stderr, "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
1996                     fd, strerror(errno));
1997             return NULL;
1998         }
1999     }
2000
2001     s = qemu_mallocz(sizeof(NetSocketState));
2002     s->fd = fd;
2003
2004     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, net_socket_receive_dgram,
2005                                  NULL, net_socket_cleanup, s);
2006     qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s);
2007
2008     /* mcast: save bound address as dst */
2009     if (is_connected) s->dgram_dst=saddr;
2010
2011     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2012             "socket: fd=%d (%s mcast=%s:%d)",
2013             fd, is_connected? "cloned" : "",
2014             inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2015     return s;
2016 }
2017
2018 static void net_socket_connect(void *opaque)
2019 {
2020     NetSocketState *s = opaque;
2021     qemu_set_fd_handler(s->fd, net_socket_send, NULL, s);
2022 }
2023
2024 static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
2025                                                  const char *model,
2026                                                  const char *name,
2027                                                  int fd, int is_connected)
2028 {
2029     NetSocketState *s;
2030     s = qemu_mallocz(sizeof(NetSocketState));
2031     s->fd = fd;
2032     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, net_socket_receive,
2033                                  NULL, net_socket_cleanup, s);
2034     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2035              "socket: fd=%d", fd);
2036     if (is_connected) {
2037         net_socket_connect(s);
2038     } else {
2039         qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
2040     }
2041     return s;
2042 }
2043
2044 static NetSocketState *net_socket_fd_init(VLANState *vlan,
2045                                           const char *model, const char *name,
2046                                           int fd, int is_connected)
2047 {
2048     int so_type=-1, optlen=sizeof(so_type);
2049
2050     if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type,
2051         (socklen_t *)&optlen)< 0) {
2052         fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n", fd);
2053         return NULL;
2054     }
2055     switch(so_type) {
2056     case SOCK_DGRAM:
2057         return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected);
2058     case SOCK_STREAM:
2059         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
2060     default:
2061         /* who knows ... this could be a eg. a pty, do warn and continue as stream */
2062         fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
2063         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
2064     }
2065     return NULL;
2066 }
2067
2068 static void net_socket_accept(void *opaque)
2069 {
2070     NetSocketListenState *s = opaque;
2071     NetSocketState *s1;
2072     struct sockaddr_in saddr;
2073     socklen_t len;
2074     int fd;
2075
2076     for(;;) {
2077         len = sizeof(saddr);
2078         fd = accept(s->fd, (struct sockaddr *)&saddr, &len);
2079         if (fd < 0 && errno != EINTR) {
2080             return;
2081         } else if (fd >= 0) {
2082             break;
2083         }
2084     }
2085     s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1);
2086     if (!s1) {
2087         closesocket(fd);
2088     } else {
2089         snprintf(s1->vc->info_str, sizeof(s1->vc->info_str),
2090                  "socket: connection from %s:%d",
2091                  inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2092     }
2093 }
2094
2095 static int net_socket_listen_init(VLANState *vlan,
2096                                   const char *model,
2097                                   const char *name,
2098                                   const char *host_str)
2099 {
2100     NetSocketListenState *s;
2101     int fd, val, ret;
2102     struct sockaddr_in saddr;
2103
2104     if (parse_host_port(&saddr, host_str) < 0)
2105         return -1;
2106
2107     s = qemu_mallocz(sizeof(NetSocketListenState));
2108
2109     fd = socket(PF_INET, SOCK_STREAM, 0);
2110     if (fd < 0) {
2111         perror("socket");
2112         return -1;
2113     }
2114     socket_set_nonblock(fd);
2115
2116     /* allow fast reuse */
2117     val = 1;
2118     setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));
2119
2120     ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
2121     if (ret < 0) {
2122         perror("bind");
2123         return -1;
2124     }
2125     ret = listen(fd, 0);
2126     if (ret < 0) {
2127         perror("listen");
2128         return -1;
2129     }
2130     s->vlan = vlan;
2131     s->model = strdup(model);
2132     s->name = name ? strdup(name) : NULL;
2133     s->fd = fd;
2134     qemu_set_fd_handler(fd, net_socket_accept, NULL, s);
2135     return 0;
2136 }
2137
2138 static int net_socket_connect_init(VLANState *vlan,
2139                                    const char *model,
2140                                    const char *name,
2141                                    const char *host_str)
2142 {
2143     NetSocketState *s;
2144     int fd, connected, ret, err;
2145     struct sockaddr_in saddr;
2146
2147     if (parse_host_port(&saddr, host_str) < 0)
2148         return -1;
2149
2150     fd = socket(PF_INET, SOCK_STREAM, 0);
2151     if (fd < 0) {
2152         perror("socket");
2153         return -1;
2154     }
2155     socket_set_nonblock(fd);
2156
2157     connected = 0;
2158     for(;;) {
2159         ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
2160         if (ret < 0) {
2161             err = socket_error();
2162             if (err == EINTR || err == EWOULDBLOCK) {
2163             } else if (err == EINPROGRESS) {
2164                 break;
2165 #ifdef _WIN32
2166             } else if (err == WSAEALREADY) {
2167                 break;
2168 #endif
2169             } else {
2170                 perror("connect");
2171                 closesocket(fd);
2172                 return -1;
2173             }
2174         } else {
2175             connected = 1;
2176             break;
2177         }
2178     }
2179     s = net_socket_fd_init(vlan, model, name, fd, connected);
2180     if (!s)
2181         return -1;
2182     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2183              "socket: connect to %s:%d",
2184              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2185     return 0;
2186 }
2187
2188 static int net_socket_mcast_init(VLANState *vlan,
2189                                  const char *model,
2190                                  const char *name,
2191                                  const char *host_str)
2192 {
2193     NetSocketState *s;
2194     int fd;
2195     struct sockaddr_in saddr;
2196
2197     if (parse_host_port(&saddr, host_str) < 0)
2198         return -1;
2199
2200
2201     fd = net_socket_mcast_create(&saddr);
2202     if (fd < 0)
2203         return -1;
2204
2205     s = net_socket_fd_init(vlan, model, name, fd, 0);
2206     if (!s)
2207         return -1;
2208
2209     s->dgram_dst = saddr;
2210
2211     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2212              "socket: mcast=%s:%d",
2213              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2214     return 0;
2215
2216 }
2217
2218 typedef struct DumpState {
2219     VLANClientState *pcap_vc;
2220     int fd;
2221     int pcap_caplen;
2222 } DumpState;
2223
2224 #define PCAP_MAGIC 0xa1b2c3d4
2225
2226 struct pcap_file_hdr {
2227     uint32_t magic;
2228     uint16_t version_major;
2229     uint16_t version_minor;
2230     int32_t thiszone;
2231     uint32_t sigfigs;
2232     uint32_t snaplen;
2233     uint32_t linktype;
2234 };
2235
2236 struct pcap_sf_pkthdr {
2237     struct {
2238         int32_t tv_sec;
2239         int32_t tv_usec;
2240     } ts;
2241     uint32_t caplen;
2242     uint32_t len;
2243 };
2244
2245 static ssize_t dump_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
2246 {
2247     DumpState *s = vc->opaque;
2248     struct pcap_sf_pkthdr hdr;
2249     int64_t ts;
2250     int caplen;
2251
2252     /* Early return in case of previous error. */
2253     if (s->fd < 0) {
2254         return size;
2255     }
2256
2257     ts = muldiv64(qemu_get_clock(vm_clock), 1000000, ticks_per_sec);
2258     caplen = size > s->pcap_caplen ? s->pcap_caplen : size;
2259
2260     hdr.ts.tv_sec = ts / 1000000;
2261     hdr.ts.tv_usec = ts % 1000000;
2262     hdr.caplen = caplen;
2263     hdr.len = size;
2264     if (write(s->fd, &hdr, sizeof(hdr)) != sizeof(hdr) ||
2265         write(s->fd, buf, caplen) != caplen) {
2266         qemu_log("-net dump write error - stop dump\n");
2267         close(s->fd);
2268         s->fd = -1;
2269     }
2270
2271     return size;
2272 }
2273
2274 static void net_dump_cleanup(VLANClientState *vc)
2275 {
2276     DumpState *s = vc->opaque;
2277
2278     close(s->fd);
2279     qemu_free(s);
2280 }
2281
2282 static int net_dump_init(Monitor *mon, VLANState *vlan, const char *device,
2283                          const char *name, const char *filename, int len)
2284 {
2285     struct pcap_file_hdr hdr;
2286     DumpState *s;
2287
2288     s = qemu_malloc(sizeof(DumpState));
2289
2290     s->fd = open(filename, O_CREAT | O_WRONLY | O_BINARY, 0644);
2291     if (s->fd < 0) {
2292         config_error(mon, "-net dump: can't open %s\n", filename);
2293         return -1;
2294     }
2295
2296     s->pcap_caplen = len;
2297
2298     hdr.magic = PCAP_MAGIC;
2299     hdr.version_major = 2;
2300     hdr.version_minor = 4;
2301     hdr.thiszone = 0;
2302     hdr.sigfigs = 0;
2303     hdr.snaplen = s->pcap_caplen;
2304     hdr.linktype = 1;
2305
2306     if (write(s->fd, &hdr, sizeof(hdr)) < sizeof(hdr)) {
2307         config_error(mon, "-net dump write error: %s\n", strerror(errno));
2308         close(s->fd);
2309         qemu_free(s);
2310         return -1;
2311     }
2312
2313     s->pcap_vc = qemu_new_vlan_client(vlan, device, name, NULL, dump_receive, NULL,
2314                                       net_dump_cleanup, s);
2315     snprintf(s->pcap_vc->info_str, sizeof(s->pcap_vc->info_str),
2316              "dump to %s (len=%d)", filename, len);
2317     return 0;
2318 }
2319
2320 /* find or alloc a new VLAN */
2321 VLANState *qemu_find_vlan(int id, int allocate)
2322 {
2323     VLANState **pvlan, *vlan;
2324     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2325         if (vlan->id == id)
2326             return vlan;
2327     }
2328     if (!allocate) {
2329         return NULL;
2330     }
2331     vlan = qemu_mallocz(sizeof(VLANState));
2332     vlan->id = id;
2333     TAILQ_INIT(&vlan->send_queue);
2334     vlan->next = NULL;
2335     pvlan = &first_vlan;
2336     while (*pvlan != NULL)
2337         pvlan = &(*pvlan)->next;
2338     *pvlan = vlan;
2339     return vlan;
2340 }
2341
2342 static int nic_get_free_idx(void)
2343 {
2344     int index;
2345
2346     for (index = 0; index < MAX_NICS; index++)
2347         if (!nd_table[index].used)
2348             return index;
2349     return -1;
2350 }
2351
2352 void qemu_check_nic_model(NICInfo *nd, const char *model)
2353 {
2354     const char *models[2];
2355
2356     models[0] = model;
2357     models[1] = NULL;
2358
2359     qemu_check_nic_model_list(nd, models, model);
2360 }
2361
2362 void qemu_check_nic_model_list(NICInfo *nd, const char * const *models,
2363                                const char *default_model)
2364 {
2365     int i, exit_status = 0;
2366
2367     if (!nd->model)
2368         nd->model = strdup(default_model);
2369
2370     if (strcmp(nd->model, "?") != 0) {
2371         for (i = 0 ; models[i]; i++)
2372             if (strcmp(nd->model, models[i]) == 0)
2373                 return;
2374
2375         fprintf(stderr, "qemu: Unsupported NIC model: %s\n", nd->model);
2376         exit_status = 1;
2377     }
2378
2379     fprintf(stderr, "qemu: Supported NIC models: ");
2380     for (i = 0 ; models[i]; i++)
2381         fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
2382
2383     exit(exit_status);
2384 }
2385
2386 static int net_handle_fd_param(Monitor *mon, const char *param)
2387 {
2388     if (!qemu_isdigit(param[0])) {
2389         int fd;
2390
2391         fd = monitor_get_fd(mon, param);
2392         if (fd == -1) {
2393             config_error(mon, "No file descriptor named %s found", param);
2394             return -1;
2395         }
2396
2397         return fd;
2398     } else {
2399         return strtol(param, NULL, 0);
2400     }
2401 }
2402
2403 int net_client_init(Monitor *mon, const char *device, const char *p)
2404 {
2405     char buf[1024];
2406     int vlan_id, ret;
2407     VLANState *vlan;
2408     char *name = NULL;
2409
2410     vlan_id = 0;
2411     if (get_param_value(buf, sizeof(buf), "vlan", p)) {
2412         vlan_id = strtol(buf, NULL, 0);
2413     }
2414     vlan = qemu_find_vlan(vlan_id, 1);
2415
2416     if (get_param_value(buf, sizeof(buf), "name", p)) {
2417         name = qemu_strdup(buf);
2418     }
2419     if (!strcmp(device, "nic")) {
2420         static const char * const nic_params[] = {
2421             "vlan", "name", "macaddr", "model", "addr", "id", "vectors", NULL
2422         };
2423         NICInfo *nd;
2424         uint8_t *macaddr;
2425         int idx = nic_get_free_idx();
2426
2427         if (check_params(buf, sizeof(buf), nic_params, p) < 0) {
2428             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2429             ret = -1;
2430             goto out;
2431         }
2432         if (idx == -1 || nb_nics >= MAX_NICS) {
2433             config_error(mon, "Too Many NICs\n");
2434             ret = -1;
2435             goto out;
2436         }
2437         nd = &nd_table[idx];
2438         macaddr = nd->macaddr;
2439         macaddr[0] = 0x52;
2440         macaddr[1] = 0x54;
2441         macaddr[2] = 0x00;
2442         macaddr[3] = 0x12;
2443         macaddr[4] = 0x34;
2444         macaddr[5] = 0x56 + idx;
2445
2446         if (get_param_value(buf, sizeof(buf), "macaddr", p)) {
2447             if (parse_macaddr(macaddr, buf) < 0) {
2448                 config_error(mon, "invalid syntax for ethernet address\n");
2449                 ret = -1;
2450                 goto out;
2451             }
2452         }
2453         if (get_param_value(buf, sizeof(buf), "model", p)) {
2454             nd->model = strdup(buf);
2455         }
2456         if (get_param_value(buf, sizeof(buf), "addr", p)) {
2457             nd->devaddr = strdup(buf);
2458         }
2459         if (get_param_value(buf, sizeof(buf), "id", p)) {
2460             nd->id = strdup(buf);
2461         }
2462         nd->nvectors = NIC_NVECTORS_UNSPECIFIED;
2463         if (get_param_value(buf, sizeof(buf), "vectors", p)) {
2464             char *endptr;
2465             long vectors = strtol(buf, &endptr, 0);
2466             if (*endptr) {
2467                 config_error(mon, "invalid syntax for # of vectors\n");
2468                 ret = -1;
2469                 goto out;
2470             }
2471             if (vectors < 0 || vectors > 0x7ffffff) {
2472                 config_error(mon, "invalid # of vectors\n");
2473                 ret = -1;
2474                 goto out;
2475             }
2476             nd->nvectors = vectors;
2477         }
2478         nd->vlan = vlan;
2479         nd->name = name;
2480         nd->used = 1;
2481         name = NULL;
2482         nb_nics++;
2483         vlan->nb_guest_devs++;
2484         ret = idx;
2485     } else
2486     if (!strcmp(device, "none")) {
2487         if (*p != '\0') {
2488             config_error(mon, "'none' takes no parameters\n");
2489             ret = -1;
2490             goto out;
2491         }
2492         /* does nothing. It is needed to signal that no network cards
2493            are wanted */
2494         ret = 0;
2495     } else
2496 #ifdef CONFIG_SLIRP
2497     if (!strcmp(device, "user")) {
2498         static const char * const slirp_params[] = {
2499             "vlan", "name", "hostname", "restrict", "ip", "net", "host",
2500             "tftp", "bootfile", "dhcpstart", "dns", "smb", "smbserver",
2501             "hostfwd", "guestfwd", NULL
2502         };
2503         struct slirp_config_str *config;
2504         int restricted = 0;
2505         char *vnet = NULL;
2506         char *vhost = NULL;
2507         char *vhostname = NULL;
2508         char *tftp_export = NULL;
2509         char *bootfile = NULL;
2510         char *vdhcp_start = NULL;
2511         char *vnamesrv = NULL;
2512         char *smb_export = NULL;
2513         char *vsmbsrv = NULL;
2514         const char *q;
2515
2516         if (check_params(buf, sizeof(buf), slirp_params, p) < 0) {
2517             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2518             ret = -1;
2519             goto out;
2520         }
2521         if (get_param_value(buf, sizeof(buf), "ip", p)) {
2522             int vnet_buflen = strlen(buf) + strlen("/24") + 1;
2523             /* emulate legacy parameter */
2524             vnet = qemu_malloc(vnet_buflen);
2525             pstrcpy(vnet, vnet_buflen, buf);
2526             pstrcat(vnet, vnet_buflen, "/24");
2527         }
2528         if (get_param_value(buf, sizeof(buf), "net", p)) {
2529             vnet = qemu_strdup(buf);
2530         }
2531         if (get_param_value(buf, sizeof(buf), "host", p)) {
2532             vhost = qemu_strdup(buf);
2533         }
2534         if (get_param_value(buf, sizeof(buf), "hostname", p)) {
2535             vhostname = qemu_strdup(buf);
2536         }
2537         if (get_param_value(buf, sizeof(buf), "restrict", p)) {
2538             restricted = (buf[0] == 'y') ? 1 : 0;
2539         }
2540         if (get_param_value(buf, sizeof(buf), "dhcpstart", p)) {
2541             vdhcp_start = qemu_strdup(buf);
2542         }
2543         if (get_param_value(buf, sizeof(buf), "dns", p)) {
2544             vnamesrv = qemu_strdup(buf);
2545         }
2546         if (get_param_value(buf, sizeof(buf), "tftp", p)) {
2547             tftp_export = qemu_strdup(buf);
2548         }
2549         if (get_param_value(buf, sizeof(buf), "bootfile", p)) {
2550             bootfile = qemu_strdup(buf);
2551         }
2552         if (get_param_value(buf, sizeof(buf), "smb", p)) {
2553             smb_export = qemu_strdup(buf);
2554             if (get_param_value(buf, sizeof(buf), "smbserver", p)) {
2555                 vsmbsrv = qemu_strdup(buf);
2556             }
2557         }
2558         q = p;
2559         while (1) {
2560             config = qemu_malloc(sizeof(*config));
2561             if (!get_next_param_value(config->str, sizeof(config->str),
2562                                       "hostfwd", &q)) {
2563                 break;
2564             }
2565             config->flags = SLIRP_CFG_HOSTFWD;
2566             config->next = slirp_configs;
2567             slirp_configs = config;
2568             config = NULL;
2569         }
2570         q = p;
2571         while (1) {
2572             config = qemu_malloc(sizeof(*config));
2573             if (!get_next_param_value(config->str, sizeof(config->str),
2574                                       "guestfwd", &q)) {
2575                 break;
2576             }
2577             config->flags = 0;
2578             config->next = slirp_configs;
2579             slirp_configs = config;
2580             config = NULL;
2581         }
2582         qemu_free(config);
2583         vlan->nb_host_devs++;
2584         ret = net_slirp_init(mon, vlan, device, name, restricted, vnet, vhost,
2585                              vhostname, tftp_export, bootfile, vdhcp_start,
2586                              vnamesrv, smb_export, vsmbsrv);
2587         qemu_free(vnet);
2588         qemu_free(vhost);
2589         qemu_free(vhostname);
2590         qemu_free(tftp_export);
2591         qemu_free(bootfile);
2592         qemu_free(vdhcp_start);
2593         qemu_free(vnamesrv);
2594         qemu_free(smb_export);
2595         qemu_free(vsmbsrv);
2596     } else if (!strcmp(device, "channel")) {
2597         if (TAILQ_EMPTY(&slirp_stacks)) {
2598             struct slirp_config_str *config;
2599
2600             config = qemu_malloc(sizeof(*config));
2601             pstrcpy(config->str, sizeof(config->str), p);
2602             config->flags = SLIRP_CFG_LEGACY;
2603             config->next = slirp_configs;
2604             slirp_configs = config;
2605         } else {
2606             slirp_guestfwd(TAILQ_FIRST(&slirp_stacks), mon, p, 1);
2607         }
2608         ret = 0;
2609     } else
2610 #endif
2611 #ifdef _WIN32
2612     if (!strcmp(device, "tap")) {
2613         static const char * const tap_params[] = {
2614             "vlan", "name", "ifname", NULL
2615         };
2616         char ifname[64];
2617
2618         if (check_params(buf, sizeof(buf), tap_params, p) < 0) {
2619             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2620             ret = -1;
2621             goto out;
2622         }
2623         if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
2624             config_error(mon, "tap: no interface name\n");
2625             ret = -1;
2626             goto out;
2627         }
2628         vlan->nb_host_devs++;
2629         ret = tap_win32_init(vlan, device, name, ifname);
2630     } else
2631 #elif defined (_AIX)
2632 #else
2633     if (!strcmp(device, "tap")) {
2634         char ifname[64], chkbuf[64];
2635         char setup_script[1024], down_script[1024];
2636         TAPState *s;
2637         int fd;
2638         vlan->nb_host_devs++;
2639         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
2640             static const char * const fd_params[] = {
2641                 "vlan", "name", "fd", "sndbuf", NULL
2642             };
2643             ret = -1;
2644             if (check_params(chkbuf, sizeof(chkbuf), fd_params, p) < 0) {
2645                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2646                 goto out;
2647             }
2648             fd = net_handle_fd_param(mon, buf);
2649             if (fd == -1) {
2650                 goto out;
2651             }
2652             fcntl(fd, F_SETFL, O_NONBLOCK);
2653             s = net_tap_fd_init(vlan, device, name, fd);
2654             if (!s) {
2655                 close(fd);
2656             }
2657         } else {
2658             static const char * const tap_params[] = {
2659                 "vlan", "name", "ifname", "script", "downscript", "sndbuf", NULL
2660             };
2661             if (check_params(chkbuf, sizeof(chkbuf), tap_params, p) < 0) {
2662                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2663                 ret = -1;
2664                 goto out;
2665             }
2666             if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
2667                 ifname[0] = '\0';
2668             }
2669             if (get_param_value(setup_script, sizeof(setup_script), "script", p) == 0) {
2670                 pstrcpy(setup_script, sizeof(setup_script), DEFAULT_NETWORK_SCRIPT);
2671             }
2672             if (get_param_value(down_script, sizeof(down_script), "downscript", p) == 0) {
2673                 pstrcpy(down_script, sizeof(down_script), DEFAULT_NETWORK_DOWN_SCRIPT);
2674             }
2675             s = net_tap_init(vlan, device, name, ifname, setup_script, down_script);
2676         }
2677         if (s != NULL) {
2678             const char *sndbuf_str = NULL;
2679             if (get_param_value(buf, sizeof(buf), "sndbuf", p)) {
2680                 sndbuf_str = buf;
2681             }
2682             tap_set_sndbuf(s, sndbuf_str, mon);
2683             ret = 0;
2684         } else {
2685             ret = -1;
2686         }
2687     } else
2688 #endif
2689     if (!strcmp(device, "socket")) {
2690         char chkbuf[64];
2691         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
2692             static const char * const fd_params[] = {
2693                 "vlan", "name", "fd", NULL
2694             };
2695             int fd;
2696             ret = -1;
2697             if (check_params(chkbuf, sizeof(chkbuf), fd_params, p) < 0) {
2698                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2699                 goto out;
2700             }
2701             fd = net_handle_fd_param(mon, buf);
2702             if (fd == -1) {
2703                 goto out;
2704             }
2705             if (!net_socket_fd_init(vlan, device, name, fd, 1)) {
2706                 close(fd);
2707                 goto out;
2708             }
2709             ret = 0;
2710         } else if (get_param_value(buf, sizeof(buf), "listen", p) > 0) {
2711             static const char * const listen_params[] = {
2712                 "vlan", "name", "listen", NULL
2713             };
2714             if (check_params(chkbuf, sizeof(chkbuf), listen_params, p) < 0) {
2715                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2716                 ret = -1;
2717                 goto out;
2718             }
2719             ret = net_socket_listen_init(vlan, device, name, buf);
2720         } else if (get_param_value(buf, sizeof(buf), "connect", p) > 0) {
2721             static const char * const connect_params[] = {
2722                 "vlan", "name", "connect", NULL
2723             };
2724             if (check_params(chkbuf, sizeof(chkbuf), connect_params, p) < 0) {
2725                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2726                 ret = -1;
2727                 goto out;
2728             }
2729             ret = net_socket_connect_init(vlan, device, name, buf);
2730         } else if (get_param_value(buf, sizeof(buf), "mcast", p) > 0) {
2731             static const char * const mcast_params[] = {
2732                 "vlan", "name", "mcast", NULL
2733             };
2734             if (check_params(chkbuf, sizeof(chkbuf), mcast_params, p) < 0) {
2735                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2736                 ret = -1;
2737                 goto out;
2738             }
2739             ret = net_socket_mcast_init(vlan, device, name, buf);
2740         } else {
2741             config_error(mon, "Unknown socket options: %s\n", p);
2742             ret = -1;
2743             goto out;
2744         }
2745         vlan->nb_host_devs++;
2746     } else
2747 #ifdef CONFIG_VDE
2748     if (!strcmp(device, "vde")) {
2749         static const char * const vde_params[] = {
2750             "vlan", "name", "sock", "port", "group", "mode", NULL
2751         };
2752         char vde_sock[1024], vde_group[512];
2753         int vde_port, vde_mode;
2754
2755         if (check_params(buf, sizeof(buf), vde_params, p) < 0) {
2756             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2757             ret = -1;
2758             goto out;
2759         }
2760         vlan->nb_host_devs++;
2761         if (get_param_value(vde_sock, sizeof(vde_sock), "sock", p) <= 0) {
2762             vde_sock[0] = '\0';
2763         }
2764         if (get_param_value(buf, sizeof(buf), "port", p) > 0) {
2765             vde_port = strtol(buf, NULL, 10);
2766         } else {
2767             vde_port = 0;
2768         }
2769         if (get_param_value(vde_group, sizeof(vde_group), "group", p) <= 0) {
2770             vde_group[0] = '\0';
2771         }
2772         if (get_param_value(buf, sizeof(buf), "mode", p) > 0) {
2773             vde_mode = strtol(buf, NULL, 8);
2774         } else {
2775             vde_mode = 0700;
2776         }
2777         ret = net_vde_init(vlan, device, name, vde_sock, vde_port, vde_group, vde_mode);
2778     } else
2779 #endif
2780     if (!strcmp(device, "dump")) {
2781         int len = 65536;
2782
2783         if (get_param_value(buf, sizeof(buf), "len", p) > 0) {
2784             len = strtol(buf, NULL, 0);
2785         }
2786         if (!get_param_value(buf, sizeof(buf), "file", p)) {
2787             snprintf(buf, sizeof(buf), "qemu-vlan%d.pcap", vlan_id);
2788         }
2789         ret = net_dump_init(mon, vlan, device, name, buf, len);
2790     } else {
2791         config_error(mon, "Unknown network device: %s\n", device);
2792         ret = -1;
2793         goto out;
2794     }
2795     if (ret < 0) {
2796         config_error(mon, "Could not initialize device '%s'\n", device);
2797     }
2798 out:
2799     qemu_free(name);
2800     return ret;
2801 }
2802
2803 void net_client_uninit(NICInfo *nd)
2804 {
2805     nd->vlan->nb_guest_devs--;
2806     nb_nics--;
2807     nd->used = 0;
2808     free((void *)nd->model);
2809 }
2810
2811 static int net_host_check_device(const char *device)
2812 {
2813     int i;
2814     const char *valid_param_list[] = { "tap", "socket", "dump"
2815 #ifdef CONFIG_SLIRP
2816                                        ,"user"
2817 #endif
2818 #ifdef CONFIG_VDE
2819                                        ,"vde"
2820 #endif
2821     };
2822     for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) {
2823         if (!strncmp(valid_param_list[i], device,
2824                      strlen(valid_param_list[i])))
2825             return 1;
2826     }
2827
2828     return 0;
2829 }
2830
2831 void net_host_device_add(Monitor *mon, const QDict *qdict)
2832 {
2833     const char *device = qdict_get_str(qdict, "device");
2834     const char *opts = qdict_get_try_str(qdict, "opts");
2835
2836     if (!net_host_check_device(device)) {
2837         monitor_printf(mon, "invalid host network device %s\n", device);
2838         return;
2839     }
2840     if (net_client_init(mon, device, opts ? opts : "") < 0) {
2841         monitor_printf(mon, "adding host network device %s failed\n", device);
2842     }
2843 }
2844
2845 void net_host_device_remove(Monitor *mon, const QDict *qdict)
2846 {
2847     VLANClientState *vc;
2848     int vlan_id = qdict_get_int(qdict, "vlan_id");
2849     const char *device = qdict_get_str(qdict, "device");
2850
2851     vc = qemu_find_vlan_client_by_name(mon, vlan_id, device);
2852     if (!vc) {
2853         return;
2854     }
2855     if (!net_host_check_device(vc->model)) {
2856         monitor_printf(mon, "invalid host network device %s\n", device);
2857         return;
2858     }
2859     qemu_del_vlan_client(vc);
2860 }
2861
2862 int net_client_parse(const char *str)
2863 {
2864     const char *p;
2865     char *q;
2866     char device[64];
2867
2868     p = str;
2869     q = device;
2870     while (*p != '\0' && *p != ',') {
2871         if ((q - device) < sizeof(device) - 1)
2872             *q++ = *p;
2873         p++;
2874     }
2875     *q = '\0';
2876     if (*p == ',')
2877         p++;
2878
2879     return net_client_init(NULL, device, p);
2880 }
2881
2882 void net_set_boot_mask(int net_boot_mask)
2883 {
2884     int i;
2885
2886     /* Only the first four NICs may be bootable */
2887     net_boot_mask = net_boot_mask & 0xF;
2888
2889     for (i = 0; i < nb_nics; i++) {
2890         if (net_boot_mask & (1 << i)) {
2891             nd_table[i].bootable = 1;
2892             net_boot_mask &= ~(1 << i);
2893         }
2894     }
2895
2896     if (net_boot_mask) {
2897         fprintf(stderr, "Cannot boot from non-existent NIC\n");
2898         exit(1);
2899     }
2900 }
2901
2902 void do_info_network(Monitor *mon)
2903 {
2904     VLANState *vlan;
2905     VLANClientState *vc;
2906
2907     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2908         monitor_printf(mon, "VLAN %d devices:\n", vlan->id);
2909         for(vc = vlan->first_client; vc != NULL; vc = vc->next)
2910             monitor_printf(mon, "  %s: %s\n", vc->name, vc->info_str);
2911     }
2912 }
2913
2914 void do_set_link(Monitor *mon, const QDict *qdict)
2915 {
2916     VLANState *vlan;
2917     VLANClientState *vc = NULL;
2918     const char *name = qdict_get_str(qdict, "name");
2919     const char *up_or_down = qdict_get_str(qdict, "up_or_down");
2920
2921     for (vlan = first_vlan; vlan != NULL; vlan = vlan->next)
2922         for (vc = vlan->first_client; vc != NULL; vc = vc->next)
2923             if (strcmp(vc->name, name) == 0)
2924                 goto done;
2925 done:
2926
2927     if (!vc) {
2928         monitor_printf(mon, "could not find network device '%s'\n", name);
2929         return;
2930     }
2931
2932     if (strcmp(up_or_down, "up") == 0)
2933         vc->link_down = 0;
2934     else if (strcmp(up_or_down, "down") == 0)
2935         vc->link_down = 1;
2936     else
2937         monitor_printf(mon, "invalid link status '%s'; only 'up' or 'down' "
2938                        "valid\n", up_or_down);
2939
2940     if (vc->link_status_changed)
2941         vc->link_status_changed(vc);
2942 }
2943
2944 void net_cleanup(void)
2945 {
2946     VLANState *vlan;
2947
2948     /* close network clients */
2949     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2950         VLANClientState *vc = vlan->first_client;
2951
2952         while (vc) {
2953             VLANClientState *next = vc->next;
2954
2955             qemu_del_vlan_client(vc);
2956
2957             vc = next;
2958         }
2959     }
2960 }
2961
2962 void net_client_check(void)
2963 {
2964     VLANState *vlan;
2965
2966     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2967         if (vlan->nb_guest_devs == 0 && vlan->nb_host_devs == 0)
2968             continue;
2969         if (vlan->nb_guest_devs == 0)
2970             fprintf(stderr, "Warning: vlan %d with no nics\n", vlan->id);
2971         if (vlan->nb_host_devs == 0)
2972             fprintf(stderr,
2973                     "Warning: vlan %d is not connected to host network\n",
2974                     vlan->id);
2975     }
2976 }