net.c

   1 /*
   2  * QEMU System Emulator
   3  *
   4  * Copyright (c) 2003-2008 Fabrice Bellard
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24 #include <unistd.h>
  25 #include <fcntl.h>
  26 #include <signal.h>
  27 #include <time.h>
  28 #include <errno.h>
  29 #include <sys/time.h>
  30 #include <zlib.h>
  31
  32 /* Needed early for HOST_BSD etc. */
  33 #include "config-host.h"
  34
  35 #ifndef _WIN32
  36 #include <sys/times.h>
  37 #include <sys/wait.h>
  38 #include <termios.h>
  39 #include <sys/mman.h>
  40 #include <sys/ioctl.h>
  41 #include <sys/resource.h>
  42 #include <sys/socket.h>
  43 #include <netinet/in.h>
  44 #include <net/if.h>
  45 #ifdef __NetBSD__
  46 #include <net/if_tap.h>
  47 #endif
  48 #ifdef __linux__
  49 #include <linux/if_tun.h>
  50 #endif
  51 #include <arpa/inet.h>
  52 #include <dirent.h>
  53 #include <netdb.h>
  54 #include <sys/select.h>
  55 #ifdef HOST_BSD
  56 #include <sys/stat.h>
  57 #if defined(__FreeBSD__) || defined(__DragonFly__)
  58 #include <libutil.h>
  59 #else
  60 #include <util.h>
  61 #endif
  62 #elif defined (__GLIBC__) && defined (__FreeBSD_kernel__)
  63 #include <freebsd/stdlib.h>
  64 #else
  65 #ifdef __linux__
  66 #include <pty.h>
  67 #include <malloc.h>
  68 #include <linux/rtc.h>
  69
  70 /* For the benefit of older linux systems which don't supply it,
  71    we use a local copy of hpet.h. */
  72 /* #include <linux/hpet.h> */
  73 #include "hpet.h"
  74
  75 #include <linux/ppdev.h>
  76 #include <linux/parport.h>
  77 #endif
  78 #ifdef __sun__
  79 #include <sys/stat.h>
  80 #include <sys/ethernet.h>
  81 #include <sys/sockio.h>
  82 #include <netinet/arp.h>
  83 #include <netinet/in.h>
  84 #include <netinet/in_systm.h>
  85 #include <netinet/ip.h>
  86 #include <netinet/ip_icmp.h> // must come after ip.h
  87 #include <netinet/udp.h>
  88 #include <netinet/tcp.h>
  89 #include <net/if.h>
  90 #include <syslog.h>
  91 #include <stropts.h>
  92 #endif
  93 #endif
  94 #endif
  95
  96 #if defined(__OpenBSD__)
  97 #include <util.h>
  98 #endif
  99
 100 #if defined(CONFIG_VDE)
 101 #include <libvdeplug.h>
 102 #endif
 103
 104 #ifdef _WIN32
 105 #include <windows.h>
 106 #include <malloc.h>
 107 #include <sys/timeb.h>
 108 #include <mmsystem.h>
 109 #define getopt_long_only getopt_long
 110 #define memalign(align, size) malloc(size)
 111 #endif
 112
 113 #include "qemu-common.h"
 114 #include "net.h"
 115 #include "monitor.h"
 116 #include "sysemu.h"
 117 #include "qemu-timer.h"
 118 #include "qemu-char.h"
 119 #include "audio/audio.h"
 120 #include "qemu_socket.h"
 121 #include "qemu-log.h"
 122
 123 #include "slirp/libslirp.h"
 124
 125
 126 static VLANState *first_vlan;
 127
 128 /***********************************************************/
 129 /* network device redirectors */
 130
 131 #if defined(DEBUG_NET) || defined(DEBUG_SLIRP)
 132 static void hex_dump(FILE *f, const uint8_t *buf, int size)
 133 {
 134     int len, i, j, c;
 135
 136     for(i=0;i<size;i+=16) {
 137         len = size - i;
 138         if (len > 16)
 139             len = 16;
 140         fprintf(f, "%08x ", i);
 141         for(j=0;j<16;j++) {
 142             if (j < len)
 143                 fprintf(f, " %02x", buf[i+j]);
 144             else
 145                 fprintf(f, "   ");
 146         }
 147         fprintf(f, " ");
 148         for(j=0;j<len;j++) {
 149             c = buf[i+j];
 150             if (c < ' ' || c > '~')
 151                 c = '.';
 152             fprintf(f, "%c", c);
 153         }
 154         fprintf(f, "\n");
 155     }
 156 }
 157 #endif
 158
 159 static int parse_macaddr(uint8_t *macaddr, const char *p)
 160 {
 161     int i;
 162     char *last_char;
 163     long int offset;
 164
 165     errno = 0;
 166     offset = strtol(p, &last_char, 0);
 167     if (0 == errno && '\0' == *last_char &&
 168             offset >= 0 && offset <= 0xFFFFFF) {
 169         macaddr[3] = (offset & 0xFF0000) >> 16;
 170         macaddr[4] = (offset & 0xFF00) >> 8;
 171         macaddr[5] = offset & 0xFF;
 172         return 0;
 173     } else {
 174         for(i = 0; i < 6; i++) {
 175             macaddr[i] = strtol(p, (char **)&p, 16);
 176             if (i == 5) {
 177                 if (*p != '\0')
 178                     return -1;
 179             } else {
 180                 if (*p != ':' && *p != '-')
 181                     return -1;
 182                 p++;
 183             }
 184         }
 185         return 0;
 186     }
 187
 188     return -1;
 189 }
 190
 191 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
 192 {
 193     const char *p, *p1;
 194     int len;
 195     p = *pp;
 196     p1 = strchr(p, sep);
 197     if (!p1)
 198         return -1;
 199     len = p1 - p;
 200     p1++;
 201     if (buf_size > 0) {
 202         if (len > buf_size - 1)
 203             len = buf_size - 1;
 204         memcpy(buf, p, len);
 205         buf[len] = '\0';
 206     }
 207     *pp = p1;
 208     return 0;
 209 }
 210
 211 int parse_host_src_port(struct sockaddr_in *haddr,
 212                         struct sockaddr_in *saddr,
 213                         const char *input_str)
 214 {
 215     char *str = strdup(input_str);
 216     char *host_str = str;
 217     char *src_str;
 218     const char *src_str2;
 219     char *ptr;
 220
 221     /*
 222      * Chop off any extra arguments at the end of the string which
 223      * would start with a comma, then fill in the src port information
 224      * if it was provided else use the "any address" and "any port".
 225      */
 226     if ((ptr = strchr(str,',')))
 227         *ptr = '\0';
 228
 229     if ((src_str = strchr(input_str,'@'))) {
 230         *src_str = '\0';
 231         src_str++;
 232     }
 233
 234     if (parse_host_port(haddr, host_str) < 0)
 235         goto fail;
 236
 237     src_str2 = src_str;
 238     if (!src_str || *src_str == '\0')
 239         src_str2 = ":0";
 240
 241     if (parse_host_port(saddr, src_str2) < 0)
 242         goto fail;
 243
 244     free(str);
 245     return(0);
 246
 247 fail:
 248     free(str);
 249     return -1;
 250 }
 251
 252 int parse_host_port(struct sockaddr_in *saddr, const char *str)
 253 {
 254     char buf[512];
 255     struct hostent *he;
 256     const char *p, *r;
 257     int port;
 258
 259     p = str;
 260     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 261         return -1;
 262     saddr->sin_family = AF_INET;
 263     if (buf[0] == '\0') {
 264         saddr->sin_addr.s_addr = 0;
 265     } else {
 266         if (qemu_isdigit(buf[0])) {
 267             if (!inet_aton(buf, &saddr->sin_addr))
 268                 return -1;
 269         } else {
 270             if ((he = gethostbyname(buf)) == NULL)
 271                 return - 1;
 272             saddr->sin_addr = *(struct in_addr *)he->h_addr;
 273         }
 274     }
 275     port = strtol(p, (char **)&r, 0);
 276     if (r == p)
 277         return -1;
 278     saddr->sin_port = htons(port);
 279     return 0;
 280 }
 281
 282 #if !defined(_WIN32) && 0
 283 static int parse_unix_path(struct sockaddr_un *uaddr, const char *str)
 284 {
 285     const char *p;
 286     int len;
 287
 288     len = MIN(108, strlen(str));
 289     p = strchr(str, ',');
 290     if (p)
 291         len = MIN(len, p - str);
 292
 293     memset(uaddr, 0, sizeof(*uaddr));
 294
 295     uaddr->sun_family = AF_UNIX;
 296     memcpy(uaddr->sun_path, str, len);
 297
 298     return 0;
 299 }
 300 #endif
 301
 302 void qemu_format_nic_info_str(VLANClientState *vc, uint8_t macaddr[6])
 303 {
 304     snprintf(vc->info_str, sizeof(vc->info_str),
 305              "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x",
 306              vc->model,
 307              macaddr[0], macaddr[1], macaddr[2],
 308              macaddr[3], macaddr[4], macaddr[5]);
 309 }
 310
 311 static char *assign_name(VLANClientState *vc1, const char *model)
 312 {
 313     VLANState *vlan;
 314     char buf[256];
 315     int id = 0;
 316
 317     for (vlan = first_vlan; vlan; vlan = vlan->next) {
 318         VLANClientState *vc;
 319
 320         for (vc = vlan->first_client; vc; vc = vc->next)
 321             if (vc != vc1 && strcmp(vc->model, model) == 0)
 322                 id++;
 323     }
 324
 325     snprintf(buf, sizeof(buf), "%s.%d", model, id);
 326
 327     return strdup(buf);
 328 }
 329
 330 VLANClientState *qemu_new_vlan_client(VLANState *vlan,
 331                                       const char *model,
 332                                       const char *name,
 333                                       NetCanReceive *can_receive,
 334                                       NetReceive *receive,
 335                                       NetReceiveIOV *receive_iov,
 336                                       NetCleanup *cleanup,
 337                                       void *opaque)
 338 {
 339     VLANClientState *vc, **pvc;
 340     vc = qemu_mallocz(sizeof(VLANClientState));
 341     vc->model = strdup(model);
 342     if (name)
 343         vc->name = strdup(name);
 344     else
 345         vc->name = assign_name(vc, model);
 346     vc->can_receive = can_receive;
 347     vc->receive = receive;
 348     vc->receive_iov = receive_iov;
 349     vc->cleanup = cleanup;
 350     vc->opaque = opaque;
 351     vc->vlan = vlan;
 352
 353     vc->next = NULL;
 354     pvc = &vlan->first_client;
 355     while (*pvc != NULL)
 356         pvc = &(*pvc)->next;
 357     *pvc = vc;
 358     return vc;
 359 }
 360
 361 void qemu_del_vlan_client(VLANClientState *vc)
 362 {
 363     VLANClientState **pvc = &vc->vlan->first_client;
 364
 365     while (*pvc != NULL)
 366         if (*pvc == vc) {
 367             *pvc = vc->next;
 368             if (vc->cleanup) {
 369                 vc->cleanup(vc);
 370             }
 371             free(vc->name);
 372             free(vc->model);
 373             qemu_free(vc);
 374             break;
 375         } else
 376             pvc = &(*pvc)->next;
 377 }
 378
 379 VLANClientState *qemu_find_vlan_client(VLANState *vlan, void *opaque)
 380 {
 381     VLANClientState **pvc = &vlan->first_client;
 382
 383     while (*pvc != NULL)
 384         if ((*pvc)->opaque == opaque)
 385             return *pvc;
 386         else
 387             pvc = &(*pvc)->next;
 388
 389     return NULL;
 390 }
 391
 392 static VLANClientState *
 393 qemu_find_vlan_client_by_name(Monitor *mon, int vlan_id,
 394                               const char *client_str)
 395 {
 396     VLANState *vlan;
 397     VLANClientState *vc;
 398
 399     vlan = qemu_find_vlan(vlan_id, 0);
 400     if (!vlan) {
 401         monitor_printf(mon, "unknown VLAN %d\n", vlan_id);
 402         return NULL;
 403     }
 404
 405     for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
 406         if (!strcmp(vc->name, client_str)) {
 407             break;
 408         }
 409     }
 410     if (!vc) {
 411         monitor_printf(mon, "can't find device %s on VLAN %d\n",
 412                        client_str, vlan_id);
 413     }
 414
 415     return vc;
 416 }
 417
 418 int qemu_can_send_packet(VLANClientState *sender)
 419 {
 420     VLANState *vlan = sender->vlan;
 421     VLANClientState *vc;
 422
 423     for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
 424         if (vc == sender) {
 425             continue;
 426         }
 427
 428         /* no can_receive() handler, they can always receive */
 429         if (!vc->can_receive || vc->can_receive(vc)) {
 430             return 1;
 431         }
 432     }
 433     return 0;
 434 }
 435
 436 static int
 437 qemu_deliver_packet(VLANClientState *sender, const uint8_t *buf, int size)
 438 {
 439     VLANClientState *vc;
 440     int ret = -1;
 441
 442     sender->vlan->delivering = 1;
 443
 444     for (vc = sender->vlan->first_client; vc != NULL; vc = vc->next) {
 445         ssize_t len;
 446
 447         if (vc == sender) {
 448             continue;
 449         }
 450
 451         if (vc->link_down) {
 452             ret = size;
 453             continue;
 454         }
 455
 456         len = vc->receive(vc, buf, size);
 457
 458         ret = (ret >= 0) ? ret : len;
 459     }
 460
 461     sender->vlan->delivering = 0;
 462
 463     return ret;
 464 }
 465
 466 void qemu_purge_queued_packets(VLANClientState *vc)
 467 {
 468     VLANPacket **pp = &vc->vlan->send_queue;
 469
 470     while (*pp != NULL) {
 471         VLANPacket *packet = *pp;
 472
 473         if (packet->sender == vc) {
 474             *pp = packet->next;
 475             qemu_free(packet);
 476         } else {
 477             pp = &packet->next;
 478         }
 479     }
 480 }
 481
 482 void qemu_flush_queued_packets(VLANClientState *vc)
 483 {
 484     VLANPacket *packet;
 485
 486     while ((packet = vc->vlan->send_queue) != NULL) {
 487         int ret;
 488
 489         vc->vlan->send_queue = packet->next;
 490
 491         ret = qemu_deliver_packet(packet->sender, packet->data, packet->size);
 492         if (ret == 0 && packet->sent_cb != NULL) {
 493             packet->next = vc->vlan->send_queue;
 494             vc->vlan->send_queue = packet;
 495             break;
 496         }
 497
 498         if (packet->sent_cb)
 499             packet->sent_cb(packet->sender, ret);
 500
 501         qemu_free(packet);
 502     }
 503 }
 504
 505 static void qemu_enqueue_packet(VLANClientState *sender,
 506                                 const uint8_t *buf, int size,
 507                                 NetPacketSent *sent_cb)
 508 {
 509     VLANPacket *packet;
 510
 511     packet = qemu_malloc(sizeof(VLANPacket) + size);
 512     packet->next = sender->vlan->send_queue;
 513     packet->sender = sender;
 514     packet->size = size;
 515     packet->sent_cb = sent_cb;
 516     memcpy(packet->data, buf, size);
 517     sender->vlan->send_queue = packet;
 518 }
 519
 520 ssize_t qemu_send_packet_async(VLANClientState *sender,
 521                                const uint8_t *buf, int size,
 522                                NetPacketSent *sent_cb)
 523 {
 524     int ret;
 525
 526     if (sender->link_down) {
 527         return size;
 528     }
 529
 530 #ifdef DEBUG_NET
 531     printf("vlan %d send:\n", sender->vlan->id);
 532     hex_dump(stdout, buf, size);
 533 #endif
 534
 535     if (sender->vlan->delivering) {
 536         qemu_enqueue_packet(sender, buf, size, NULL);
 537         return size;
 538     }
 539
 540     ret = qemu_deliver_packet(sender, buf, size);
 541     if (ret == 0 && sent_cb != NULL) {
 542         qemu_enqueue_packet(sender, buf, size, sent_cb);
 543         return 0;
 544     }
 545
 546     qemu_flush_queued_packets(sender);
 547
 548     return ret;
 549 }
 550
 551 void qemu_send_packet(VLANClientState *vc, const uint8_t *buf, int size)
 552 {
 553     qemu_send_packet_async(vc, buf, size, NULL);
 554 }
 555
 556 static ssize_t vc_sendv_compat(VLANClientState *vc, const struct iovec *iov,
 557                                int iovcnt)
 558 {
 559     uint8_t buffer[4096];
 560     size_t offset = 0;
 561     int i;
 562
 563     for (i = 0; i < iovcnt; i++) {
 564         size_t len;
 565
 566         len = MIN(sizeof(buffer) - offset, iov[i].iov_len);
 567         memcpy(buffer + offset, iov[i].iov_base, len);
 568         offset += len;
 569     }
 570
 571     return vc->receive(vc, buffer, offset);
 572 }
 573
 574 static ssize_t calc_iov_length(const struct iovec *iov, int iovcnt)
 575 {
 576     size_t offset = 0;
 577     int i;
 578
 579     for (i = 0; i < iovcnt; i++)
 580         offset += iov[i].iov_len;
 581     return offset;
 582 }
 583
 584 static int qemu_deliver_packet_iov(VLANClientState *sender,
 585                                    const struct iovec *iov, int iovcnt)
 586 {
 587     VLANClientState *vc;
 588     int ret = -1;
 589
 590     sender->vlan->delivering = 1;
 591
 592     for (vc = sender->vlan->first_client; vc != NULL; vc = vc->next) {
 593         ssize_t len;
 594
 595         if (vc == sender) {
 596             continue;
 597         }
 598
 599         if (vc->link_down) {
 600             ret = calc_iov_length(iov, iovcnt);
 601             continue;
 602         }
 603
 604         if (vc->receive_iov) {
 605             len = vc->receive_iov(vc, iov, iovcnt);
 606         } else {
 607             len = vc_sendv_compat(vc, iov, iovcnt);
 608         }
 609
 610         ret = (ret >= 0) ? ret : len;
 611     }
 612
 613     sender->vlan->delivering = 0;
 614
 615     return ret;
 616 }
 617
 618 static ssize_t qemu_enqueue_packet_iov(VLANClientState *sender,
 619                                        const struct iovec *iov, int iovcnt,
 620                                        NetPacketSent *sent_cb)
 621 {
 622     VLANPacket *packet;
 623     size_t max_len = 0;
 624     int i;
 625
 626     max_len = calc_iov_length(iov, iovcnt);
 627
 628     packet = qemu_malloc(sizeof(VLANPacket) + max_len);
 629     packet->next = sender->vlan->send_queue;
 630     packet->sender = sender;
 631     packet->sent_cb = sent_cb;
 632     packet->size = 0;
 633
 634     for (i = 0; i < iovcnt; i++) {
 635         size_t len = iov[i].iov_len;
 636
 637         memcpy(packet->data + packet->size, iov[i].iov_base, len);
 638         packet->size += len;
 639     }
 640
 641     sender->vlan->send_queue = packet;
 642
 643     return packet->size;
 644 }
 645
 646 ssize_t qemu_sendv_packet_async(VLANClientState *sender,
 647                                 const struct iovec *iov, int iovcnt,
 648                                 NetPacketSent *sent_cb)
 649 {
 650     int ret;
 651
 652     if (sender->link_down) {
 653         return calc_iov_length(iov, iovcnt);
 654     }
 655
 656     if (sender->vlan->delivering) {
 657         return qemu_enqueue_packet_iov(sender, iov, iovcnt, NULL);
 658     }
 659
 660     ret = qemu_deliver_packet_iov(sender, iov, iovcnt);
 661     if (ret == 0 && sent_cb != NULL) {
 662         qemu_enqueue_packet_iov(sender, iov, iovcnt, sent_cb);
 663         return 0;
 664     }
 665
 666     qemu_flush_queued_packets(sender);
 667
 668     return ret;
 669 }
 670
 671 ssize_t
 672 qemu_sendv_packet(VLANClientState *vc, const struct iovec *iov, int iovcnt)
 673 {
 674     return qemu_sendv_packet_async(vc, iov, iovcnt, NULL);
 675 }
 676
 677 static void config_error(Monitor *mon, const char *fmt, ...)
 678 {
 679     va_list ap;
 680
 681     va_start(ap, fmt);
 682     if (mon) {
 683         monitor_vprintf(mon, fmt, ap);
 684     } else {
 685         fprintf(stderr, "qemu: ");
 686         vfprintf(stderr, fmt, ap);
 687         exit(1);
 688     }
 689     va_end(ap);
 690 }
 691
 692 #if defined(CONFIG_SLIRP)
 693
 694 /* slirp network adapter */
 695
 696 #define SLIRP_CFG_HOSTFWD 1
 697 #define SLIRP_CFG_LEGACY  2
 698
 699 struct slirp_config_str {
 700     struct slirp_config_str *next;
 701     int flags;
 702     char str[1024];
 703     int legacy_format;
 704 };
 705
 706 typedef struct SlirpState {
 707     TAILQ_ENTRY(SlirpState) entry;
 708     VLANClientState *vc;
 709     Slirp *slirp;
 710 #ifndef _WIN32
 711     char smb_dir[128];
 712 #endif
 713 } SlirpState;
 714
 715 static struct slirp_config_str *slirp_configs;
 716 const char *legacy_tftp_prefix;
 717 const char *legacy_bootp_filename;
 718 static TAILQ_HEAD(slirp_stacks, SlirpState) slirp_stacks =
 719     TAILQ_HEAD_INITIALIZER(slirp_stacks);
 720
 721 static void slirp_hostfwd(SlirpState *s, Monitor *mon, const char *redir_str,
 722                           int legacy_format);
 723 static void slirp_guestfwd(SlirpState *s, Monitor *mon, const char *config_str,
 724                            int legacy_format);
 725
 726 #ifndef _WIN32
 727 static const char *legacy_smb_export;
 728
 729 static void slirp_smb(SlirpState *s, Monitor *mon, const char *exported_dir,
 730                       struct in_addr vserver_addr);
 731 static void slirp_smb_cleanup(SlirpState *s);
 732 #else
 733 static inline void slirp_smb_cleanup(SlirpState *s) { }
 734 #endif
 735
 736 int slirp_can_output(void *opaque)
 737 {
 738     SlirpState *s = opaque;
 739
 740     return qemu_can_send_packet(s->vc);
 741 }
 742
 743 void slirp_output(void *opaque, const uint8_t *pkt, int pkt_len)
 744 {
 745     SlirpState *s = opaque;
 746
 747 #ifdef DEBUG_SLIRP
 748     printf("slirp output:\n");
 749     hex_dump(stdout, pkt, pkt_len);
 750 #endif
 751     qemu_send_packet(s->vc, pkt, pkt_len);
 752 }
 753
 754 static ssize_t slirp_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
 755 {
 756     SlirpState *s = vc->opaque;
 757
 758 #ifdef DEBUG_SLIRP
 759     printf("slirp input:\n");
 760     hex_dump(stdout, buf, size);
 761 #endif
 762     slirp_input(s->slirp, buf, size);
 763     return size;
 764 }
 765
 766 static void net_slirp_cleanup(VLANClientState *vc)
 767 {
 768     SlirpState *s = vc->opaque;
 769
 770     slirp_cleanup(s->slirp);
 771     slirp_smb_cleanup(s);
 772     TAILQ_REMOVE(&slirp_stacks, s, entry);
 773     qemu_free(s);
 774 }
 775
 776 static int net_slirp_init(Monitor *mon, VLANState *vlan, const char *model,
 777                           const char *name, int restricted,
 778                           const char *vnetwork, const char *vhost,
 779                           const char *vhostname, const char *tftp_export,
 780                           const char *bootfile, const char *vdhcp_start,
 781                           const char *vnameserver, const char *smb_export,
 782                           const char *vsmbserver)
 783 {
 784     /* default settings according to historic slirp */
 785     struct in_addr net  = { .s_addr = htonl(0x0a000000) }; /* 10.0.0.0 */
 786     struct in_addr mask = { .s_addr = htonl(0xff000000) }; /* 255.0.0.0 */
 787     struct in_addr host = { .s_addr = htonl(0x0a000202) }; /* 10.0.2.2 */
 788     struct in_addr dhcp = { .s_addr = htonl(0x0a00020f) }; /* 10.0.2.15 */
 789     struct in_addr dns  = { .s_addr = htonl(0x0a000203) }; /* 10.0.2.3 */
 790 #ifndef _WIN32
 791     struct in_addr smbsrv = { .s_addr = 0 };
 792 #endif
 793     SlirpState *s;
 794     char buf[20];
 795     uint32_t addr;
 796     int shift;
 797     char *end;
 798
 799     if (!tftp_export) {
 800         tftp_export = legacy_tftp_prefix;
 801     }
 802     if (!bootfile) {
 803         bootfile = legacy_bootp_filename;
 804     }
 805
 806     if (vnetwork) {
 807         if (get_str_sep(buf, sizeof(buf), &vnetwork, '/') < 0) {
 808             if (!inet_aton(vnetwork, &net)) {
 809                 return -1;
 810             }
 811             addr = ntohl(net.s_addr);
 812             if (!(addr & 0x80000000)) {
 813                 mask.s_addr = htonl(0xff000000); /* class A */
 814             } else if ((addr & 0xfff00000) == 0xac100000) {
 815                 mask.s_addr = htonl(0xfff00000); /* priv. 172.16.0.0/12 */
 816             } else if ((addr & 0xc0000000) == 0x80000000) {
 817                 mask.s_addr = htonl(0xffff0000); /* class B */
 818             } else if ((addr & 0xffff0000) == 0xc0a80000) {
 819                 mask.s_addr = htonl(0xffff0000); /* priv. 192.168.0.0/16 */
 820             } else if ((addr & 0xffff0000) == 0xc6120000) {
 821                 mask.s_addr = htonl(0xfffe0000); /* tests 198.18.0.0/15 */
 822             } else if ((addr & 0xe0000000) == 0xe0000000) {
 823                 mask.s_addr = htonl(0xffffff00); /* class C */
 824             } else {
 825                 mask.s_addr = htonl(0xfffffff0); /* multicast/reserved */
 826             }
 827         } else {
 828             if (!inet_aton(buf, &net)) {
 829                 return -1;
 830             }
 831             shift = strtol(vnetwork, &end, 10);
 832             if (*end != '\0') {
 833                 if (!inet_aton(vnetwork, &mask)) {
 834                     return -1;
 835                 }
 836             } else if (shift < 4 || shift > 32) {
 837                 return -1;
 838             } else {
 839                 mask.s_addr = htonl(0xffffffff << (32 - shift));
 840             }
 841         }
 842         net.s_addr &= mask.s_addr;
 843         host.s_addr = net.s_addr | (htonl(0x0202) & ~mask.s_addr);
 844         dhcp.s_addr = net.s_addr | (htonl(0x020f) & ~mask.s_addr);
 845         dns.s_addr  = net.s_addr | (htonl(0x0203) & ~mask.s_addr);
 846     }
 847
 848     if (vhost && !inet_aton(vhost, &host)) {
 849         return -1;
 850     }
 851     if ((host.s_addr & mask.s_addr) != net.s_addr) {
 852         return -1;
 853     }
 854
 855     if (vdhcp_start && !inet_aton(vdhcp_start, &dhcp)) {
 856         return -1;
 857     }
 858     if ((dhcp.s_addr & mask.s_addr) != net.s_addr ||
 859         dhcp.s_addr == host.s_addr || dhcp.s_addr == dns.s_addr) {
 860         return -1;
 861     }
 862
 863     if (vnameserver && !inet_aton(vnameserver, &dns)) {
 864         return -1;
 865     }
 866     if ((dns.s_addr & mask.s_addr) != net.s_addr ||
 867         dns.s_addr == host.s_addr) {
 868         return -1;
 869     }
 870
 871 #ifndef _WIN32
 872     if (vsmbserver && !inet_aton(vsmbserver, &smbsrv)) {
 873         return -1;
 874     }
 875 #endif
 876
 877     s = qemu_mallocz(sizeof(SlirpState));
 878     s->slirp = slirp_init(restricted, net, mask, host, vhostname,
 879                           tftp_export, bootfile, dhcp, dns, s);
 880     TAILQ_INSERT_TAIL(&slirp_stacks, s, entry);
 881
 882     while (slirp_configs) {
 883         struct slirp_config_str *config = slirp_configs;
 884
 885         if (config->flags & SLIRP_CFG_HOSTFWD) {
 886             slirp_hostfwd(s, mon, config->str,
 887                           config->flags & SLIRP_CFG_LEGACY);
 888         } else {
 889             slirp_guestfwd(s, mon, config->str,
 890                            config->flags & SLIRP_CFG_LEGACY);
 891         }
 892         slirp_configs = config->next;
 893         qemu_free(config);
 894     }
 895 #ifndef _WIN32
 896     if (!smb_export) {
 897         smb_export = legacy_smb_export;
 898     }
 899     if (smb_export) {
 900         slirp_smb(s, mon, smb_export, smbsrv);
 901     }
 902 #endif
 903
 904     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, slirp_receive, NULL,
 905                                  net_slirp_cleanup, s);
 906     s->vc->info_str[0] = '\0';
 907     return 0;
 908 }
 909
 910 void net_slirp_hostfwd_remove(Monitor *mon, const char *src_str)
 911 {
 912     struct in_addr host_addr = { .s_addr = INADDR_ANY };
 913     int host_port;
 914     char buf[256] = "";
 915     const char *p = src_str;
 916     int is_udp = 0;
 917     int err;
 918
 919     if (TAILQ_EMPTY(&slirp_stacks)) {
 920         monitor_printf(mon, "user mode network stack not in use\n");
 921         return;
 922     }
 923
 924     if (!src_str || !src_str[0])
 925         goto fail_syntax;
 926
 927     get_str_sep(buf, sizeof(buf), &p, ':');
 928
 929     if (!strcmp(buf, "tcp") || buf[0] == '\0') {
 930         is_udp = 0;
 931     } else if (!strcmp(buf, "udp")) {
 932         is_udp = 1;
 933     } else {
 934         goto fail_syntax;
 935     }
 936
 937     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 938         goto fail_syntax;
 939     }
 940     if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
 941         goto fail_syntax;
 942     }
 943
 944     host_port = atoi(p);
 945
 946     err = slirp_remove_hostfwd(TAILQ_FIRST(&slirp_stacks)->slirp, is_udp,
 947                                host_addr, host_port);
 948
 949     monitor_printf(mon, "host forwarding rule for %s %s\n", src_str,
 950                    err ? "removed" : "not found");
 951     return;
 952
 953  fail_syntax:
 954     monitor_printf(mon, "invalid format\n");
 955 }
 956
 957 static void slirp_hostfwd(SlirpState *s, Monitor *mon, const char *redir_str,
 958                           int legacy_format)
 959 {
 960     struct in_addr host_addr = { .s_addr = INADDR_ANY };
 961     struct in_addr guest_addr = { .s_addr = 0 };
 962     int host_port, guest_port;
 963     const char *p;
 964     char buf[256];
 965     int is_udp;
 966     char *end;
 967
 968     p = redir_str;
 969     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 970         goto fail_syntax;
 971     }
 972     if (!strcmp(buf, "tcp") || buf[0] == '\0') {
 973         is_udp = 0;
 974     } else if (!strcmp(buf, "udp")) {
 975         is_udp = 1;
 976     } else {
 977         goto fail_syntax;
 978     }
 979
 980     if (!legacy_format) {
 981         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 982             goto fail_syntax;
 983         }
 984         if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
 985             goto fail_syntax;
 986         }
 987     }
 988
 989     if (get_str_sep(buf, sizeof(buf), &p, legacy_format ? ':' : '-') < 0) {
 990         goto fail_syntax;
 991     }
 992     host_port = strtol(buf, &end, 0);
 993     if (*end != '\0' || host_port < 1 || host_port > 65535) {
 994         goto fail_syntax;
 995     }
 996
 997     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 998         goto fail_syntax;
 999     }
1000     if (buf[0] != '\0' && !inet_aton(buf, &guest_addr)) {
1001         goto fail_syntax;
1002     }
1003
1004     guest_port = strtol(p, &end, 0);
1005     if (*end != '\0' || guest_port < 1 || guest_port > 65535) {
1006         goto fail_syntax;
1007     }
1008
1009     if (slirp_add_hostfwd(s->slirp, is_udp, host_addr, host_port, guest_addr,
1010                           guest_port) < 0) {
1011         config_error(mon, "could not set up host forwarding rule '%s'\n",
1012                      redir_str);
1013     }
1014     return;
1015
1016  fail_syntax:
1017     config_error(mon, "invalid host forwarding rule '%s'\n", redir_str);
1018 }
1019
1020 void net_slirp_hostfwd_add(Monitor *mon, const char *redir_str)
1021 {
1022     if (TAILQ_EMPTY(&slirp_stacks)) {
1023         monitor_printf(mon, "user mode network stack not in use\n");
1024         return;
1025     }
1026
1027     slirp_hostfwd(TAILQ_FIRST(&slirp_stacks), mon, redir_str, 0);
1028 }
1029
1030 void net_slirp_redir(const char *redir_str)
1031 {
1032     struct slirp_config_str *config;
1033
1034     if (TAILQ_EMPTY(&slirp_stacks)) {
1035         config = qemu_malloc(sizeof(*config));
1036         pstrcpy(config->str, sizeof(config->str), redir_str);
1037         config->flags = SLIRP_CFG_HOSTFWD | SLIRP_CFG_LEGACY;
1038         config->next = slirp_configs;
1039         slirp_configs = config;
1040         return;
1041     }
1042
1043     slirp_hostfwd(TAILQ_FIRST(&slirp_stacks), NULL, redir_str, 1);
1044 }
1045
1046 #ifndef _WIN32
1047
1048 /* automatic user mode samba server configuration */
1049 static void slirp_smb_cleanup(SlirpState *s)
1050 {
1051     char cmd[128];
1052
1053     if (s->smb_dir[0] != '\0') {
1054         snprintf(cmd, sizeof(cmd), "rm -rf %s", s->smb_dir);
1055         system(cmd);
1056         s->smb_dir[0] = '\0';
1057     }
1058 }
1059
1060 static void slirp_smb(SlirpState* s, Monitor *mon, const char *exported_dir,
1061                       struct in_addr vserver_addr)
1062 {
1063     static int instance;
1064     char smb_conf[128];
1065     char smb_cmdline[128];
1066     FILE *f;
1067
1068     snprintf(s->smb_dir, sizeof(s->smb_dir), "/tmp/qemu-smb.%ld-%d",
1069              (long)getpid(), instance++);
1070     if (mkdir(s->smb_dir, 0700) < 0) {
1071         config_error(mon, "could not create samba server dir '%s'\n",
1072                      s->smb_dir);
1073         return;
1074     }
1075     snprintf(smb_conf, sizeof(smb_conf), "%s/%s", s->smb_dir, "smb.conf");
1076
1077     f = fopen(smb_conf, "w");
1078     if (!f) {
1079         slirp_smb_cleanup(s);
1080         config_error(mon, "could not create samba server "
1081                      "configuration file '%s'\n", smb_conf);
1082         return;
1083     }
1084     fprintf(f,
1085             "[global]\n"
1086             "private dir=%s\n"
1087             "smb ports=0\n"
1088             "socket address=127.0.0.1\n"
1089             "pid directory=%s\n"
1090             "lock directory=%s\n"
1091             "log file=%s/log.smbd\n"
1092             "smb passwd file=%s/smbpasswd\n"
1093             "security = share\n"
1094             "[qemu]\n"
1095             "path=%s\n"
1096             "read only=no\n"
1097             "guest ok=yes\n",
1098             s->smb_dir,
1099             s->smb_dir,
1100             s->smb_dir,
1101             s->smb_dir,
1102             s->smb_dir,
1103             exported_dir
1104             );
1105     fclose(f);
1106
1107     snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -s %s",
1108              SMBD_COMMAND, smb_conf);
1109
1110     if (slirp_add_exec(s->slirp, 0, smb_cmdline, vserver_addr, 139) < 0) {
1111         slirp_smb_cleanup(s);
1112         config_error(mon, "conflicting/invalid smbserver address\n");
1113     }
1114 }
1115
1116 /* automatic user mode samba server configuration (legacy interface) */
1117 void net_slirp_smb(const char *exported_dir)
1118 {
1119     struct in_addr vserver_addr = { .s_addr = 0 };
1120
1121     if (legacy_smb_export) {
1122         fprintf(stderr, "-smb given twice\n");
1123         exit(1);
1124     }
1125     legacy_smb_export = exported_dir;
1126     if (!TAILQ_EMPTY(&slirp_stacks)) {
1127         slirp_smb(TAILQ_FIRST(&slirp_stacks), NULL, exported_dir,
1128                   vserver_addr);
1129     }
1130 }
1131
1132 #endif /* !defined(_WIN32) */
1133
1134 struct GuestFwd {
1135     CharDriverState *hd;
1136     struct in_addr server;
1137     int port;
1138     Slirp *slirp;
1139 };
1140
1141 static int guestfwd_can_read(void *opaque)
1142 {
1143     struct GuestFwd *fwd = opaque;
1144     return slirp_socket_can_recv(fwd->slirp, fwd->server, fwd->port);
1145 }
1146
1147 static void guestfwd_read(void *opaque, const uint8_t *buf, int size)
1148 {
1149     struct GuestFwd *fwd = opaque;
1150     slirp_socket_recv(fwd->slirp, fwd->server, fwd->port, buf, size);
1151 }
1152
1153 static void slirp_guestfwd(SlirpState *s, Monitor *mon, const char *config_str,
1154                            int legacy_format)
1155 {
1156     struct in_addr server = { .s_addr = 0 };
1157     struct GuestFwd *fwd;
1158     const char *p;
1159     char buf[128];
1160     char *end;
1161     int port;
1162
1163     p = config_str;
1164     if (legacy_format) {
1165         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1166             goto fail_syntax;
1167         }
1168     } else {
1169         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1170             goto fail_syntax;
1171         }
1172         if (strcmp(buf, "tcp") && buf[0] != '\0') {
1173             goto fail_syntax;
1174         }
1175         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1176             goto fail_syntax;
1177         }
1178         if (buf[0] != '\0' && !inet_aton(buf, &server)) {
1179             goto fail_syntax;
1180         }
1181         if (get_str_sep(buf, sizeof(buf), &p, '-') < 0) {
1182             goto fail_syntax;
1183         }
1184     }
1185     port = strtol(buf, &end, 10);
1186     if (*end != '\0' || port < 1 || port > 65535) {
1187         goto fail_syntax;
1188     }
1189
1190     fwd = qemu_malloc(sizeof(struct GuestFwd));
1191     snprintf(buf, sizeof(buf), "guestfwd.tcp:%d", port);
1192     fwd->hd = qemu_chr_open(buf, p, NULL);
1193     if (!fwd->hd) {
1194         config_error(mon, "could not open guest forwarding device '%s'\n",
1195                      buf);
1196         qemu_free(fwd);
1197         return;
1198     }
1199     fwd->server = server;
1200     fwd->port = port;
1201     fwd->slirp = s->slirp;
1202
1203     if (slirp_add_exec(s->slirp, 3, fwd->hd, server, port) < 0) {
1204         config_error(mon, "conflicting/invalid host:port in guest forwarding "
1205                      "rule '%s'\n", config_str);
1206         qemu_free(fwd);
1207         return;
1208     }
1209     qemu_chr_add_handlers(fwd->hd, guestfwd_can_read, guestfwd_read,
1210                           NULL, fwd);
1211     return;
1212
1213  fail_syntax:
1214     config_error(mon, "invalid guest forwarding rule '%s'\n", config_str);
1215 }
1216
1217 void do_info_usernet(Monitor *mon)
1218 {
1219     SlirpState *s;
1220
1221     TAILQ_FOREACH(s, &slirp_stacks, entry) {
1222         monitor_printf(mon, "VLAN %d (%s):\n", s->vc->vlan->id, s->vc->name);
1223         slirp_connection_info(s->slirp, mon);
1224     }
1225 }
1226
1227 #endif /* CONFIG_SLIRP */
1228
1229 #if !defined(_WIN32)
1230
1231 typedef struct TAPState {
1232     VLANClientState *vc;
1233     int fd;
1234     char down_script[1024];
1235     char down_script_arg[128];
1236     uint8_t buf[4096];
1237     unsigned int read_poll : 1;
1238     unsigned int write_poll : 1;
1239 } TAPState;
1240
1241 static int launch_script(const char *setup_script, const char *ifname, int fd);
1242
1243 static int tap_can_send(void *opaque);
1244 static void tap_send(void *opaque);
1245 static void tap_writable(void *opaque);
1246
1247 static void tap_update_fd_handler(TAPState *s)
1248 {
1249     qemu_set_fd_handler2(s->fd,
1250                          s->read_poll  ? tap_can_send : NULL,
1251                          s->read_poll  ? tap_send     : NULL,
1252                          s->write_poll ? tap_writable : NULL,
1253                          s);
1254 }
1255
1256 static void tap_read_poll(TAPState *s, int enable)
1257 {
1258     s->read_poll = !!enable;
1259     tap_update_fd_handler(s);
1260 }
1261
1262 static void tap_write_poll(TAPState *s, int enable)
1263 {
1264     s->write_poll = !!enable;
1265     tap_update_fd_handler(s);
1266 }
1267
1268 static void tap_writable(void *opaque)
1269 {
1270     TAPState *s = opaque;
1271
1272     tap_write_poll(s, 0);
1273
1274     qemu_flush_queued_packets(s->vc);
1275 }
1276
1277 static ssize_t tap_receive_iov(VLANClientState *vc, const struct iovec *iov,
1278                                int iovcnt)
1279 {
1280     TAPState *s = vc->opaque;
1281     ssize_t len;
1282
1283     do {
1284         len = writev(s->fd, iov, iovcnt);
1285     } while (len == -1 && errno == EINTR);
1286
1287     if (len == -1 && errno == EAGAIN) {
1288         tap_write_poll(s, 1);
1289         return 0;
1290     }
1291
1292     return len;
1293 }
1294
1295 static ssize_t tap_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1296 {
1297     TAPState *s = vc->opaque;
1298     ssize_t len;
1299
1300     do {
1301         len = write(s->fd, buf, size);
1302     } while (len == -1 && (errno == EINTR || errno == EAGAIN));
1303
1304     return len;
1305 }
1306
1307 static int tap_can_send(void *opaque)
1308 {
1309     TAPState *s = opaque;
1310
1311     return qemu_can_send_packet(s->vc);
1312 }
1313
1314 #ifdef __sun__
1315 static ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
1316 {
1317     struct strbuf sbuf;
1318     int f = 0;
1319
1320     sbuf.maxlen = maxlen;
1321     sbuf.buf = (char *)buf;
1322
1323     return getmsg(tapfd, NULL, &sbuf, &f) >= 0 ? sbuf.len : -1;
1324 }
1325 #else
1326 static ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
1327 {
1328     return read(tapfd, buf, maxlen);
1329 }
1330 #endif
1331
1332 static void tap_send_completed(VLANClientState *vc, ssize_t len)
1333 {
1334     TAPState *s = vc->opaque;
1335     tap_read_poll(s, 1);
1336 }
1337
1338 static void tap_send(void *opaque)
1339 {
1340     TAPState *s = opaque;
1341     int size;
1342
1343     do {
1344         size = tap_read_packet(s->fd, s->buf, sizeof(s->buf));
1345         if (size <= 0) {
1346             break;
1347         }
1348
1349         size = qemu_send_packet_async(s->vc, s->buf, size, tap_send_completed);
1350         if (size == 0) {
1351             tap_read_poll(s, 0);
1352         }
1353     } while (size > 0);
1354 }
1355
1356 static void tap_set_sndbuf(TAPState *s, int sndbuf, Monitor *mon)
1357 {
1358 #ifdef TUNSETSNDBUF
1359     if (ioctl(s->fd, TUNSETSNDBUF, &sndbuf) == -1) {
1360         config_error(mon, "TUNSETSNDBUF ioctl failed: %s\n",
1361                      strerror(errno));
1362     }
1363 #else
1364     config_error(mon, "No '-net tap,sndbuf=<nbytes>' support available\n");
1365 #endif
1366 }
1367
1368 static void tap_cleanup(VLANClientState *vc)
1369 {
1370     TAPState *s = vc->opaque;
1371
1372     qemu_purge_queued_packets(vc);
1373
1374     if (s->down_script[0])
1375         launch_script(s->down_script, s->down_script_arg, s->fd);
1376
1377     tap_read_poll(s, 0);
1378     tap_write_poll(s, 0);
1379     close(s->fd);
1380     qemu_free(s);
1381 }
1382
1383 /* fd support */
1384
1385 static TAPState *net_tap_fd_init(VLANState *vlan,
1386                                  const char *model,
1387                                  const char *name,
1388                                  int fd)
1389 {
1390     TAPState *s;
1391
1392     s = qemu_mallocz(sizeof(TAPState));
1393     s->fd = fd;
1394     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, tap_receive,
1395                                  tap_receive_iov, tap_cleanup, s);
1396     tap_read_poll(s, 1);
1397     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "fd=%d", fd);
1398     return s;
1399 }
1400
1401 #if defined (HOST_BSD) || defined (__FreeBSD_kernel__)
1402 static int tap_open(char *ifname, int ifname_size)
1403 {
1404     int fd;
1405     char *dev;
1406     struct stat s;
1407
1408     TFR(fd = open("/dev/tap", O_RDWR));
1409     if (fd < 0) {
1410         fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n");
1411         return -1;
1412     }
1413
1414     fstat(fd, &s);
1415     dev = devname(s.st_rdev, S_IFCHR);
1416     pstrcpy(ifname, ifname_size, dev);
1417
1418     fcntl(fd, F_SETFL, O_NONBLOCK);
1419     return fd;
1420 }
1421 #elif defined(__sun__)
1422 #define TUNNEWPPA       (('T'<<16) | 0x0001)
1423 /*
1424  * Allocate TAP device, returns opened fd.
1425  * Stores dev name in the first arg(must be large enough).
1426  */
1427 static int tap_alloc(char *dev, size_t dev_size)
1428 {
1429     int tap_fd, if_fd, ppa = -1;
1430     static int ip_fd = 0;
1431     char *ptr;
1432
1433     static int arp_fd = 0;
1434     int ip_muxid, arp_muxid;
1435     struct strioctl  strioc_if, strioc_ppa;
1436     int link_type = I_PLINK;;
1437     struct lifreq ifr;
1438     char actual_name[32] = "";
1439
1440     memset(&ifr, 0x0, sizeof(ifr));
1441
1442     if( *dev ){
1443        ptr = dev;
1444        while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
1445        ppa = atoi(ptr);
1446     }
1447
1448     /* Check if IP device was opened */
1449     if( ip_fd )
1450        close(ip_fd);
1451
1452     TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
1453     if (ip_fd < 0) {
1454        syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)");
1455        return -1;
1456     }
1457
1458     TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
1459     if (tap_fd < 0) {
1460        syslog(LOG_ERR, "Can't open /dev/tap");
1461        return -1;
1462     }
1463
1464     /* Assign a new PPA and get its unit number. */
1465     strioc_ppa.ic_cmd = TUNNEWPPA;
1466     strioc_ppa.ic_timout = 0;
1467     strioc_ppa.ic_len = sizeof(ppa);
1468     strioc_ppa.ic_dp = (char *)&ppa;
1469     if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
1470        syslog (LOG_ERR, "Can't assign new interface");
1471
1472     TFR(if_fd = open("/dev/tap", O_RDWR, 0));
1473     if (if_fd < 0) {
1474        syslog(LOG_ERR, "Can't open /dev/tap (2)");
1475        return -1;
1476     }
1477     if(ioctl(if_fd, I_PUSH, "ip") < 0){
1478        syslog(LOG_ERR, "Can't push IP module");
1479        return -1;
1480     }
1481
1482     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
1483         syslog(LOG_ERR, "Can't get flags\n");
1484
1485     snprintf (actual_name, 32, "tap%d", ppa);
1486     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
1487
1488     ifr.lifr_ppa = ppa;
1489     /* Assign ppa according to the unit number returned by tun device */
1490
1491     if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
1492         syslog (LOG_ERR, "Can't set PPA %d", ppa);
1493     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
1494         syslog (LOG_ERR, "Can't get flags\n");
1495     /* Push arp module to if_fd */
1496     if (ioctl (if_fd, I_PUSH, "arp") < 0)
1497         syslog (LOG_ERR, "Can't push ARP module (2)");
1498
1499     /* Push arp module to ip_fd */
1500     if (ioctl (ip_fd, I_POP, NULL) < 0)
1501         syslog (LOG_ERR, "I_POP failed\n");
1502     if (ioctl (ip_fd, I_PUSH, "arp") < 0)
1503         syslog (LOG_ERR, "Can't push ARP module (3)\n");
1504     /* Open arp_fd */
1505     TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
1506     if (arp_fd < 0)
1507        syslog (LOG_ERR, "Can't open %s\n", "/dev/tap");
1508
1509     /* Set ifname to arp */
1510     strioc_if.ic_cmd = SIOCSLIFNAME;
1511     strioc_if.ic_timout = 0;
1512     strioc_if.ic_len = sizeof(ifr);
1513     strioc_if.ic_dp = (char *)&ifr;
1514     if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
1515         syslog (LOG_ERR, "Can't set ifname to arp\n");
1516     }
1517
1518     if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
1519        syslog(LOG_ERR, "Can't link TAP device to IP");
1520        return -1;
1521     }
1522
1523     if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
1524         syslog (LOG_ERR, "Can't link TAP device to ARP");
1525
1526     close (if_fd);
1527
1528     memset(&ifr, 0x0, sizeof(ifr));
1529     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
1530     ifr.lifr_ip_muxid  = ip_muxid;
1531     ifr.lifr_arp_muxid = arp_muxid;
1532
1533     if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
1534     {
1535       ioctl (ip_fd, I_PUNLINK , arp_muxid);
1536       ioctl (ip_fd, I_PUNLINK, ip_muxid);
1537       syslog (LOG_ERR, "Can't set multiplexor id");
1538     }
1539
1540     snprintf(dev, dev_size, "tap%d", ppa);
1541     return tap_fd;
1542 }
1543
1544 static int tap_open(char *ifname, int ifname_size)
1545 {
1546     char  dev[10]="";
1547     int fd;
1548     if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){
1549        fprintf(stderr, "Cannot allocate TAP device\n");
1550        return -1;
1551     }
1552     pstrcpy(ifname, ifname_size, dev);
1553     fcntl(fd, F_SETFL, O_NONBLOCK);
1554     return fd;
1555 }
1556 #elif defined (_AIX)
1557 static int tap_open(char *ifname, int ifname_size)
1558 {
1559     fprintf (stderr, "no tap on AIX\n");
1560     return -1;
1561 }
1562 #else
1563 static int tap_open(char *ifname, int ifname_size)
1564 {
1565     struct ifreq ifr;
1566     int fd, ret;
1567
1568     TFR(fd = open("/dev/net/tun", O_RDWR));
1569     if (fd < 0) {
1570         fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n");
1571         return -1;
1572     }
1573     memset(&ifr, 0, sizeof(ifr));
1574     ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
1575     if (ifname[0] != '\0')
1576         pstrcpy(ifr.ifr_name, IFNAMSIZ, ifname);
1577     else
1578         pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d");
1579     ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
1580     if (ret != 0) {
1581         fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n");
1582         close(fd);
1583         return -1;
1584     }
1585     pstrcpy(ifname, ifname_size, ifr.ifr_name);
1586     fcntl(fd, F_SETFL, O_NONBLOCK);
1587     return fd;
1588 }
1589 #endif
1590
1591 static int launch_script(const char *setup_script, const char *ifname, int fd)
1592 {
1593     sigset_t oldmask, mask;
1594     int pid, status;
1595     char *args[3];
1596     char **parg;
1597
1598     sigemptyset(&mask);
1599     sigaddset(&mask, SIGCHLD);
1600     sigprocmask(SIG_BLOCK, &mask, &oldmask);
1601
1602     /* try to launch network script */
1603     pid = fork();
1604     if (pid == 0) {
1605         int open_max = sysconf(_SC_OPEN_MAX), i;
1606
1607         for (i = 0; i < open_max; i++) {
1608             if (i != STDIN_FILENO &&
1609                 i != STDOUT_FILENO &&
1610                 i != STDERR_FILENO &&
1611                 i != fd) {
1612                 close(i);
1613             }
1614         }
1615         parg = args;
1616         *parg++ = (char *)setup_script;
1617         *parg++ = (char *)ifname;
1618         *parg++ = NULL;
1619         execv(setup_script, args);
1620         _exit(1);
1621     } else if (pid > 0) {
1622         while (waitpid(pid, &status, 0) != pid) {
1623             /* loop */
1624         }
1625         sigprocmask(SIG_SETMASK, &oldmask, NULL);
1626
1627         if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
1628             return 0;
1629         }
1630     }
1631     fprintf(stderr, "%s: could not launch network script\n", setup_script);
1632     return -1;
1633 }
1634
1635 static TAPState *net_tap_init(VLANState *vlan, const char *model,
1636                               const char *name, const char *ifname1,
1637                               const char *setup_script, const char *down_script)
1638 {
1639     TAPState *s;
1640     int fd;
1641     char ifname[128];
1642
1643     if (ifname1 != NULL)
1644         pstrcpy(ifname, sizeof(ifname), ifname1);
1645     else
1646         ifname[0] = '\0';
1647     TFR(fd = tap_open(ifname, sizeof(ifname)));
1648     if (fd < 0)
1649         return NULL;
1650
1651     if (!setup_script || !strcmp(setup_script, "no"))
1652         setup_script = "";
1653     if (setup_script[0] != '\0' &&
1654         launch_script(setup_script, ifname, fd)) {
1655         return NULL;
1656     }
1657     s = net_tap_fd_init(vlan, model, name, fd);
1658     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1659              "ifname=%s,script=%s,downscript=%s",
1660              ifname, setup_script, down_script);
1661     if (down_script && strcmp(down_script, "no")) {
1662         snprintf(s->down_script, sizeof(s->down_script), "%s", down_script);
1663         snprintf(s->down_script_arg, sizeof(s->down_script_arg), "%s", ifname);
1664     }
1665     return s;
1666 }
1667
1668 #endif /* !_WIN32 */
1669
1670 #if defined(CONFIG_VDE)
1671 typedef struct VDEState {
1672     VLANClientState *vc;
1673     VDECONN *vde;
1674 } VDEState;
1675
1676 static void vde_to_qemu(void *opaque)
1677 {
1678     VDEState *s = opaque;
1679     uint8_t buf[4096];
1680     int size;
1681
1682     size = vde_recv(s->vde, (char *)buf, sizeof(buf), 0);
1683     if (size > 0) {
1684         qemu_send_packet(s->vc, buf, size);
1685     }
1686 }
1687
1688 static ssize_t vde_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1689 {
1690     VDEState *s = vc->opaque;
1691     ssize_t ret;
1692
1693     do {
1694       ret = vde_send(s->vde, (const char *)buf, size, 0);
1695     } while (ret < 0 && errno == EINTR);
1696
1697     return ret;
1698 }
1699
1700 static void vde_cleanup(VLANClientState *vc)
1701 {
1702     VDEState *s = vc->opaque;
1703     qemu_set_fd_handler(vde_datafd(s->vde), NULL, NULL, NULL);
1704     vde_close(s->vde);
1705     qemu_free(s);
1706 }
1707
1708 static int net_vde_init(VLANState *vlan, const char *model,
1709                         const char *name, const char *sock,
1710                         int port, const char *group, int mode)
1711 {
1712     VDEState *s;
1713     char *init_group = strlen(group) ? (char *)group : NULL;
1714     char *init_sock = strlen(sock) ? (char *)sock : NULL;
1715
1716     struct vde_open_args args = {
1717         .port = port,
1718         .group = init_group,
1719         .mode = mode,
1720     };
1721
1722     s = qemu_mallocz(sizeof(VDEState));
1723     s->vde = vde_open(init_sock, (char *)"QEMU", &args);
1724     if (!s->vde){
1725         free(s);
1726         return -1;
1727     }
1728     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, vde_receive,
1729                                  NULL, vde_cleanup, s);
1730     qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
1731     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "sock=%s,fd=%d",
1732              sock, vde_datafd(s->vde));
1733     return 0;
1734 }
1735 #endif
1736
1737 /* network connection */
1738 typedef struct NetSocketState {
1739     VLANClientState *vc;
1740     int fd;
1741     int state; /* 0 = getting length, 1 = getting data */
1742     unsigned int index;
1743     unsigned int packet_len;
1744     uint8_t buf[4096];
1745     struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
1746 } NetSocketState;
1747
1748 typedef struct NetSocketListenState {
1749     VLANState *vlan;
1750     char *model;
1751     char *name;
1752     int fd;
1753 } NetSocketListenState;
1754
1755 /* XXX: we consider we can send the whole packet without blocking */
1756 static ssize_t net_socket_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1757 {
1758     NetSocketState *s = vc->opaque;
1759     uint32_t len;
1760     len = htonl(size);
1761
1762     send_all(s->fd, (const uint8_t *)&len, sizeof(len));
1763     return send_all(s->fd, buf, size);
1764 }
1765
1766 static ssize_t net_socket_receive_dgram(VLANClientState *vc, const uint8_t *buf, size_t size)
1767 {
1768     NetSocketState *s = vc->opaque;
1769
1770     return sendto(s->fd, (const void *)buf, size, 0,
1771                   (struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst));
1772 }
1773
1774 static void net_socket_send(void *opaque)
1775 {
1776     NetSocketState *s = opaque;
1777     int size, err;
1778     unsigned l;
1779     uint8_t buf1[4096];
1780     const uint8_t *buf;
1781
1782     size = recv(s->fd, (void *)buf1, sizeof(buf1), 0);
1783     if (size < 0) {
1784         err = socket_error();
1785         if (err != EWOULDBLOCK)
1786             goto eoc;
1787     } else if (size == 0) {
1788         /* end of connection */
1789     eoc:
1790         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1791         closesocket(s->fd);
1792         return;
1793     }
1794     buf = buf1;
1795     while (size > 0) {
1796         /* reassemble a packet from the network */
1797         switch(s->state) {
1798         case 0:
1799             l = 4 - s->index;
1800             if (l > size)
1801                 l = size;
1802             memcpy(s->buf + s->index, buf, l);
1803             buf += l;
1804             size -= l;
1805             s->index += l;
1806             if (s->index == 4) {
1807                 /* got length */
1808                 s->packet_len = ntohl(*(uint32_t *)s->buf);
1809                 s->index = 0;
1810                 s->state = 1;
1811             }
1812             break;
1813         case 1:
1814             l = s->packet_len - s->index;
1815             if (l > size)
1816                 l = size;
1817             if (s->index + l <= sizeof(s->buf)) {
1818                 memcpy(s->buf + s->index, buf, l);
1819             } else {
1820                 fprintf(stderr, "serious error: oversized packet received,"
1821                     "connection terminated.\n");
1822                 s->state = 0;
1823                 goto eoc;
1824             }
1825
1826             s->index += l;
1827             buf += l;
1828             size -= l;
1829             if (s->index >= s->packet_len) {
1830                 qemu_send_packet(s->vc, s->buf, s->packet_len);
1831                 s->index = 0;
1832                 s->state = 0;
1833             }
1834             break;
1835         }
1836     }
1837 }
1838
1839 static void net_socket_send_dgram(void *opaque)
1840 {
1841     NetSocketState *s = opaque;
1842     int size;
1843
1844     size = recv(s->fd, (void *)s->buf, sizeof(s->buf), 0);
1845     if (size < 0)
1846         return;
1847     if (size == 0) {
1848         /* end of connection */
1849         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1850         return;
1851     }
1852     qemu_send_packet(s->vc, s->buf, size);
1853 }
1854
1855 static int net_socket_mcast_create(struct sockaddr_in *mcastaddr)
1856 {
1857     struct ip_mreq imr;
1858     int fd;
1859     int val, ret;
1860     if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
1861         fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n",
1862                 inet_ntoa(mcastaddr->sin_addr),
1863                 (int)ntohl(mcastaddr->sin_addr.s_addr));
1864         return -1;
1865
1866     }
1867     fd = socket(PF_INET, SOCK_DGRAM, 0);
1868     if (fd < 0) {
1869         perror("socket(PF_INET, SOCK_DGRAM)");
1870         return -1;
1871     }
1872
1873     val = 1;
1874     ret=setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
1875                    (const char *)&val, sizeof(val));
1876     if (ret < 0) {
1877         perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
1878         goto fail;
1879     }
1880
1881     ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
1882     if (ret < 0) {
1883         perror("bind");
1884         goto fail;
1885     }
1886
1887     /* Add host to multicast group */
1888     imr.imr_multiaddr = mcastaddr->sin_addr;
1889     imr.imr_interface.s_addr = htonl(INADDR_ANY);
1890
1891     ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1892                      (const char *)&imr, sizeof(struct ip_mreq));
1893     if (ret < 0) {
1894         perror("setsockopt(IP_ADD_MEMBERSHIP)");
1895         goto fail;
1896     }
1897
1898     /* Force mcast msgs to loopback (eg. several QEMUs in same host */
1899     val = 1;
1900     ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1901                    (const char *)&val, sizeof(val));
1902     if (ret < 0) {
1903         perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
1904         goto fail;
1905     }
1906
1907     socket_set_nonblock(fd);
1908     return fd;
1909 fail:
1910     if (fd >= 0)
1911         closesocket(fd);
1912     return -1;
1913 }
1914
1915 static void net_socket_cleanup(VLANClientState *vc)
1916 {
1917     NetSocketState *s = vc->opaque;
1918     qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1919     close(s->fd);
1920     qemu_free(s);
1921 }
1922
1923 static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
1924                                                 const char *model,
1925                                                 const char *name,
1926                                                 int fd, int is_connected)
1927 {
1928     struct sockaddr_in saddr;
1929     int newfd;
1930     socklen_t saddr_len;
1931     NetSocketState *s;
1932
1933     /* fd passed: multicast: "learn" dgram_dst address from bound address and save it
1934      * Because this may be "shared" socket from a "master" process, datagrams would be recv()
1935      * by ONLY ONE process: we must "clone" this dgram socket --jjo
1936      */
1937
1938     if (is_connected) {
1939         if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
1940             /* must be bound */
1941             if (saddr.sin_addr.s_addr==0) {
1942                 fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, cannot setup multicast dst addr\n",
1943                         fd);
1944                 return NULL;
1945             }
1946             /* clone dgram socket */
1947             newfd = net_socket_mcast_create(&saddr);
1948             if (newfd < 0) {
1949                 /* error already reported by net_socket_mcast_create() */
1950                 close(fd);
1951                 return NULL;
1952             }
1953             /* clone newfd to fd, close newfd */
1954             dup2(newfd, fd);
1955             close(newfd);
1956
1957         } else {
1958             fprintf(stderr, "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
1959                     fd, strerror(errno));
1960             return NULL;
1961         }
1962     }
1963
1964     s = qemu_mallocz(sizeof(NetSocketState));
1965     s->fd = fd;
1966
1967     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, net_socket_receive_dgram,
1968                                  NULL, net_socket_cleanup, s);
1969     qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s);
1970
1971     /* mcast: save bound address as dst */
1972     if (is_connected) s->dgram_dst=saddr;
1973
1974     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1975             "socket: fd=%d (%s mcast=%s:%d)",
1976             fd, is_connected? "cloned" : "",
1977             inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1978     return s;
1979 }
1980
1981 static void net_socket_connect(void *opaque)
1982 {
1983     NetSocketState *s = opaque;
1984     qemu_set_fd_handler(s->fd, net_socket_send, NULL, s);
1985 }
1986
1987 static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
1988                                                  const char *model,
1989                                                  const char *name,
1990                                                  int fd, int is_connected)
1991 {
1992     NetSocketState *s;
1993     s = qemu_mallocz(sizeof(NetSocketState));
1994     s->fd = fd;
1995     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, net_socket_receive,
1996                                  NULL, net_socket_cleanup, s);
1997     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1998              "socket: fd=%d", fd);
1999     if (is_connected) {
2000         net_socket_connect(s);
2001     } else {
2002         qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
2003     }
2004     return s;
2005 }
2006
2007 static NetSocketState *net_socket_fd_init(VLANState *vlan,
2008                                           const char *model, const char *name,
2009                                           int fd, int is_connected)
2010 {
2011     int so_type=-1, optlen=sizeof(so_type);
2012
2013     if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type,
2014         (socklen_t *)&optlen)< 0) {
2015         fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n", fd);
2016         return NULL;
2017     }
2018     switch(so_type) {
2019     case SOCK_DGRAM:
2020         return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected);
2021     case SOCK_STREAM:
2022         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
2023     default:
2024         /* who knows ... this could be a eg. a pty, do warn and continue as stream */
2025         fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
2026         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
2027     }
2028     return NULL;
2029 }
2030
2031 static void net_socket_accept(void *opaque)
2032 {
2033     NetSocketListenState *s = opaque;
2034     NetSocketState *s1;
2035     struct sockaddr_in saddr;
2036     socklen_t len;
2037     int fd;
2038
2039     for(;;) {
2040         len = sizeof(saddr);
2041         fd = accept(s->fd, (struct sockaddr *)&saddr, &len);
2042         if (fd < 0 && errno != EINTR) {
2043             return;
2044         } else if (fd >= 0) {
2045             break;
2046         }
2047     }
2048     s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1);
2049     if (!s1) {
2050         closesocket(fd);
2051     } else {
2052         snprintf(s1->vc->info_str, sizeof(s1->vc->info_str),
2053                  "socket: connection from %s:%d",
2054                  inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2055     }
2056 }
2057
2058 static int net_socket_listen_init(VLANState *vlan,
2059                                   const char *model,
2060                                   const char *name,
2061                                   const char *host_str)
2062 {
2063     NetSocketListenState *s;
2064     int fd, val, ret;
2065     struct sockaddr_in saddr;
2066
2067     if (parse_host_port(&saddr, host_str) < 0)
2068         return -1;
2069
2070     s = qemu_mallocz(sizeof(NetSocketListenState));
2071
2072     fd = socket(PF_INET, SOCK_STREAM, 0);
2073     if (fd < 0) {
2074         perror("socket");
2075         return -1;
2076     }
2077     socket_set_nonblock(fd);
2078
2079     /* allow fast reuse */
2080     val = 1;
2081     setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));
2082
2083     ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
2084     if (ret < 0) {
2085         perror("bind");
2086         return -1;
2087     }
2088     ret = listen(fd, 0);
2089     if (ret < 0) {
2090         perror("listen");
2091         return -1;
2092     }
2093     s->vlan = vlan;
2094     s->model = strdup(model);
2095     s->name = name ? strdup(name) : NULL;
2096     s->fd = fd;
2097     qemu_set_fd_handler(fd, net_socket_accept, NULL, s);
2098     return 0;
2099 }
2100
2101 static int net_socket_connect_init(VLANState *vlan,
2102                                    const char *model,
2103                                    const char *name,
2104                                    const char *host_str)
2105 {
2106     NetSocketState *s;
2107     int fd, connected, ret, err;
2108     struct sockaddr_in saddr;
2109
2110     if (parse_host_port(&saddr, host_str) < 0)
2111         return -1;
2112
2113     fd = socket(PF_INET, SOCK_STREAM, 0);
2114     if (fd < 0) {
2115         perror("socket");
2116         return -1;
2117     }
2118     socket_set_nonblock(fd);
2119
2120     connected = 0;
2121     for(;;) {
2122         ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
2123         if (ret < 0) {
2124             err = socket_error();
2125             if (err == EINTR || err == EWOULDBLOCK) {
2126             } else if (err == EINPROGRESS) {
2127                 break;
2128 #ifdef _WIN32
2129             } else if (err == WSAEALREADY) {
2130                 break;
2131 #endif
2132             } else {
2133                 perror("connect");
2134                 closesocket(fd);
2135                 return -1;
2136             }
2137         } else {
2138             connected = 1;
2139             break;
2140         }
2141     }
2142     s = net_socket_fd_init(vlan, model, name, fd, connected);
2143     if (!s)
2144         return -1;
2145     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2146              "socket: connect to %s:%d",
2147              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2148     return 0;
2149 }
2150
2151 static int net_socket_mcast_init(VLANState *vlan,
2152                                  const char *model,
2153                                  const char *name,
2154                                  const char *host_str)
2155 {
2156     NetSocketState *s;
2157     int fd;
2158     struct sockaddr_in saddr;
2159
2160     if (parse_host_port(&saddr, host_str) < 0)
2161         return -1;
2162
2163
2164     fd = net_socket_mcast_create(&saddr);
2165     if (fd < 0)
2166         return -1;
2167
2168     s = net_socket_fd_init(vlan, model, name, fd, 0);
2169     if (!s)
2170         return -1;
2171
2172     s->dgram_dst = saddr;
2173
2174     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2175              "socket: mcast=%s:%d",
2176              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2177     return 0;
2178
2179 }
2180
2181 typedef struct DumpState {
2182     VLANClientState *pcap_vc;
2183     int fd;
2184     int pcap_caplen;
2185 } DumpState;
2186
2187 #define PCAP_MAGIC 0xa1b2c3d4
2188
2189 struct pcap_file_hdr {
2190     uint32_t magic;
2191     uint16_t version_major;
2192     uint16_t version_minor;
2193     int32_t thiszone;
2194     uint32_t sigfigs;
2195     uint32_t snaplen;
2196     uint32_t linktype;
2197 };
2198
2199 struct pcap_sf_pkthdr {
2200     struct {
2201         int32_t tv_sec;
2202         int32_t tv_usec;
2203     } ts;
2204     uint32_t caplen;
2205     uint32_t len;
2206 };
2207
2208 static ssize_t dump_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
2209 {
2210     DumpState *s = vc->opaque;
2211     struct pcap_sf_pkthdr hdr;
2212     int64_t ts;
2213     int caplen;
2214
2215     /* Early return in case of previous error. */
2216     if (s->fd < 0) {
2217         return size;
2218     }
2219
2220     ts = muldiv64(qemu_get_clock(vm_clock), 1000000, ticks_per_sec);
2221     caplen = size > s->pcap_caplen ? s->pcap_caplen : size;
2222
2223     hdr.ts.tv_sec = ts / 1000000;
2224     hdr.ts.tv_usec = ts % 1000000;
2225     hdr.caplen = caplen;
2226     hdr.len = size;
2227     if (write(s->fd, &hdr, sizeof(hdr)) != sizeof(hdr) ||
2228         write(s->fd, buf, caplen) != caplen) {
2229         qemu_log("-net dump write error - stop dump\n");
2230         close(s->fd);
2231         s->fd = -1;
2232     }
2233
2234     return size;
2235 }
2236
2237 static void net_dump_cleanup(VLANClientState *vc)
2238 {
2239     DumpState *s = vc->opaque;
2240
2241     close(s->fd);
2242     qemu_free(s);
2243 }
2244
2245 static int net_dump_init(Monitor *mon, VLANState *vlan, const char *device,
2246                          const char *name, const char *filename, int len)
2247 {
2248     struct pcap_file_hdr hdr;
2249     DumpState *s;
2250
2251     s = qemu_malloc(sizeof(DumpState));
2252
2253     s->fd = open(filename, O_CREAT | O_WRONLY | O_BINARY, 0644);
2254     if (s->fd < 0) {
2255         config_error(mon, "-net dump: can't open %s\n", filename);
2256         return -1;
2257     }
2258
2259     s->pcap_caplen = len;
2260
2261     hdr.magic = PCAP_MAGIC;
2262     hdr.version_major = 2;
2263     hdr.version_minor = 4;
2264     hdr.thiszone = 0;
2265     hdr.sigfigs = 0;
2266     hdr.snaplen = s->pcap_caplen;
2267     hdr.linktype = 1;
2268
2269     if (write(s->fd, &hdr, sizeof(hdr)) < sizeof(hdr)) {
2270         config_error(mon, "-net dump write error: %s\n", strerror(errno));
2271         close(s->fd);
2272         qemu_free(s);
2273         return -1;
2274     }
2275
2276     s->pcap_vc = qemu_new_vlan_client(vlan, device, name, NULL, dump_receive, NULL,
2277                                       net_dump_cleanup, s);
2278     snprintf(s->pcap_vc->info_str, sizeof(s->pcap_vc->info_str),
2279              "dump to %s (len=%d)", filename, len);
2280     return 0;
2281 }
2282
2283 /* find or alloc a new VLAN */
2284 VLANState *qemu_find_vlan(int id, int allocate)
2285 {
2286     VLANState **pvlan, *vlan;
2287     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2288         if (vlan->id == id)
2289             return vlan;
2290     }
2291     if (!allocate) {
2292         return NULL;
2293     }
2294     vlan = qemu_mallocz(sizeof(VLANState));
2295     vlan->id = id;
2296     vlan->next = NULL;
2297     pvlan = &first_vlan;
2298     while (*pvlan != NULL)
2299         pvlan = &(*pvlan)->next;
2300     *pvlan = vlan;
2301     return vlan;
2302 }
2303
2304 static int nic_get_free_idx(void)
2305 {
2306     int index;
2307
2308     for (index = 0; index < MAX_NICS; index++)
2309         if (!nd_table[index].used)
2310             return index;
2311     return -1;
2312 }
2313
2314 void qemu_check_nic_model(NICInfo *nd, const char *model)
2315 {
2316     const char *models[2];
2317
2318     models[0] = model;
2319     models[1] = NULL;
2320
2321     qemu_check_nic_model_list(nd, models, model);
2322 }
2323
2324 void qemu_check_nic_model_list(NICInfo *nd, const char * const *models,
2325                                const char *default_model)
2326 {
2327     int i, exit_status = 0;
2328
2329     if (!nd->model)
2330         nd->model = strdup(default_model);
2331
2332     if (strcmp(nd->model, "?") != 0) {
2333         for (i = 0 ; models[i]; i++)
2334             if (strcmp(nd->model, models[i]) == 0)
2335                 return;
2336
2337         fprintf(stderr, "qemu: Unsupported NIC model: %s\n", nd->model);
2338         exit_status = 1;
2339     }
2340
2341     fprintf(stderr, "qemu: Supported NIC models: ");
2342     for (i = 0 ; models[i]; i++)
2343         fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
2344
2345     exit(exit_status);
2346 }
2347
2348 int net_client_init(Monitor *mon, const char *device, const char *p)
2349 {
2350     char buf[1024];
2351     int vlan_id, ret;
2352     VLANState *vlan;
2353     char *name = NULL;
2354
2355     vlan_id = 0;
2356     if (get_param_value(buf, sizeof(buf), "vlan", p)) {
2357         vlan_id = strtol(buf, NULL, 0);
2358     }
2359     vlan = qemu_find_vlan(vlan_id, 1);
2360
2361     if (get_param_value(buf, sizeof(buf), "name", p)) {
2362         name = qemu_strdup(buf);
2363     }
2364     if (!strcmp(device, "nic")) {
2365         static const char * const nic_params[] = {
2366             "vlan", "name", "macaddr", "model", "addr", "vectors", NULL
2367         };
2368         NICInfo *nd;
2369         uint8_t *macaddr;
2370         int idx = nic_get_free_idx();
2371
2372         if (check_params(buf, sizeof(buf), nic_params, p) < 0) {
2373             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2374             ret = -1;
2375             goto out;
2376         }
2377         if (idx == -1 || nb_nics >= MAX_NICS) {
2378             config_error(mon, "Too Many NICs\n");
2379             ret = -1;
2380             goto out;
2381         }
2382         nd = &nd_table[idx];
2383         macaddr = nd->macaddr;
2384         macaddr[0] = 0x52;
2385         macaddr[1] = 0x54;
2386         macaddr[2] = 0x00;
2387         macaddr[3] = 0x12;
2388         macaddr[4] = 0x34;
2389         macaddr[5] = 0x56 + idx;
2390
2391         if (get_param_value(buf, sizeof(buf), "macaddr", p)) {
2392             if (parse_macaddr(macaddr, buf) < 0) {
2393                 config_error(mon, "invalid syntax for ethernet address\n");
2394                 ret = -1;
2395                 goto out;
2396             }
2397         }
2398         if (get_param_value(buf, sizeof(buf), "model", p)) {
2399             nd->model = strdup(buf);
2400         }
2401         if (get_param_value(buf, sizeof(buf), "addr", p)) {
2402             nd->devaddr = strdup(buf);
2403         }
2404         nd->nvectors = NIC_NVECTORS_UNSPECIFIED;
2405         if (get_param_value(buf, sizeof(buf), "vectors", p)) {
2406             char *endptr;
2407             long vectors = strtol(buf, &endptr, 0);
2408             if (*endptr) {
2409                 config_error(mon, "invalid syntax for # of vectors\n");
2410                 ret = -1;
2411                 goto out;
2412             }
2413             if (vectors < 0 || vectors > 0x7ffffff) {
2414                 config_error(mon, "invalid # of vectors\n");
2415                 ret = -1;
2416                 goto out;
2417             }
2418             nd->nvectors = vectors;
2419         }
2420         nd->vlan = vlan;
2421         nd->name = name;
2422         nd->used = 1;
2423         name = NULL;
2424         nb_nics++;
2425         vlan->nb_guest_devs++;
2426         ret = idx;
2427     } else
2428     if (!strcmp(device, "none")) {
2429         if (*p != '\0') {
2430             config_error(mon, "'none' takes no parameters\n");
2431             ret = -1;
2432             goto out;
2433         }
2434         /* does nothing. It is needed to signal that no network cards
2435            are wanted */
2436         ret = 0;
2437     } else
2438 #ifdef CONFIG_SLIRP
2439     if (!strcmp(device, "user")) {
2440         static const char * const slirp_params[] = {
2441             "vlan", "name", "hostname", "restrict", "ip", "net", "host",
2442             "tftp", "bootfile", "dhcpstart", "dns", "smb", "smbserver",
2443             "hostfwd", "guestfwd", NULL
2444         };
2445         struct slirp_config_str *config;
2446         int restricted = 0;
2447         char *vnet = NULL;
2448         char *vhost = NULL;
2449         char *vhostname = NULL;
2450         char *tftp_export = NULL;
2451         char *bootfile = NULL;
2452         char *vdhcp_start = NULL;
2453         char *vnamesrv = NULL;
2454         char *smb_export = NULL;
2455         char *vsmbsrv = NULL;
2456         const char *q;
2457
2458         if (check_params(buf, sizeof(buf), slirp_params, p) < 0) {
2459             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2460             ret = -1;
2461             goto out;
2462         }
2463         if (get_param_value(buf, sizeof(buf), "ip", p)) {
2464             /* emulate legacy parameter */
2465             vnet = qemu_malloc(strlen(buf) + strlen("/24") + 1);
2466             strcpy(vnet, buf);
2467             strcat(vnet, "/24");
2468         }
2469         if (get_param_value(buf, sizeof(buf), "net", p)) {
2470             vnet = qemu_strdup(buf);
2471         }
2472         if (get_param_value(buf, sizeof(buf), "host", p)) {
2473             vhost = qemu_strdup(buf);
2474         }
2475         if (get_param_value(buf, sizeof(buf), "hostname", p)) {
2476             vhostname = qemu_strdup(buf);
2477         }
2478         if (get_param_value(buf, sizeof(buf), "restrict", p)) {
2479             restricted = (buf[0] == 'y') ? 1 : 0;
2480         }
2481         if (get_param_value(buf, sizeof(buf), "dhcpstart", p)) {
2482             vdhcp_start = qemu_strdup(buf);
2483         }
2484         if (get_param_value(buf, sizeof(buf), "dns", p)) {
2485             vnamesrv = qemu_strdup(buf);
2486         }
2487         if (get_param_value(buf, sizeof(buf), "tftp", p)) {
2488             tftp_export = qemu_strdup(buf);
2489         }
2490         if (get_param_value(buf, sizeof(buf), "bootfile", p)) {
2491             bootfile = qemu_strdup(buf);
2492         }
2493         if (get_param_value(buf, sizeof(buf), "smb", p)) {
2494             smb_export = qemu_strdup(buf);
2495             if (get_param_value(buf, sizeof(buf), "smbserver", p)) {
2496                 vsmbsrv = qemu_strdup(buf);
2497             }
2498         }
2499         q = p;
2500         while (1) {
2501             config = qemu_malloc(sizeof(*config));
2502             if (!get_next_param_value(config->str, sizeof(config->str),
2503                                       "hostfwd", &q)) {
2504                 break;
2505             }
2506             config->flags = SLIRP_CFG_HOSTFWD;
2507             config->next = slirp_configs;
2508             slirp_configs = config;
2509             config = NULL;
2510         }
2511         q = p;
2512         while (1) {
2513             config = qemu_malloc(sizeof(*config));
2514             if (!get_next_param_value(config->str, sizeof(config->str),
2515                                       "guestfwd", &q)) {
2516                 break;
2517             }
2518             config->flags = 0;
2519             config->next = slirp_configs;
2520             slirp_configs = config;
2521             config = NULL;
2522         }
2523         qemu_free(config);
2524         vlan->nb_host_devs++;
2525         ret = net_slirp_init(mon, vlan, device, name, restricted, vnet, vhost,
2526                              vhostname, tftp_export, bootfile, vdhcp_start,
2527                              vnamesrv, smb_export, vsmbsrv);
2528         qemu_free(vnet);
2529         qemu_free(vhost);
2530         qemu_free(vhostname);
2531         qemu_free(tftp_export);
2532         qemu_free(bootfile);
2533         qemu_free(vdhcp_start);
2534         qemu_free(vnamesrv);
2535         qemu_free(smb_export);
2536         qemu_free(vsmbsrv);
2537     } else if (!strcmp(device, "channel")) {
2538         if (TAILQ_EMPTY(&slirp_stacks)) {
2539             struct slirp_config_str *config;
2540
2541             config = qemu_malloc(sizeof(*config));
2542             pstrcpy(config->str, sizeof(config->str), p);
2543             config->flags = SLIRP_CFG_LEGACY;
2544             config->next = slirp_configs;
2545             slirp_configs = config;
2546         } else {
2547             slirp_guestfwd(TAILQ_FIRST(&slirp_stacks), mon, p, 1);
2548         }
2549         ret = 0;
2550     } else
2551 #endif
2552 #ifdef _WIN32
2553     if (!strcmp(device, "tap")) {
2554         static const char * const tap_params[] = {
2555             "vlan", "name", "ifname", NULL
2556         };
2557         char ifname[64];
2558
2559         if (check_params(buf, sizeof(buf), tap_params, p) < 0) {
2560             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2561             ret = -1;
2562             goto out;
2563         }
2564         if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
2565             config_error(mon, "tap: no interface name\n");
2566             ret = -1;
2567             goto out;
2568         }
2569         vlan->nb_host_devs++;
2570         ret = tap_win32_init(vlan, device, name, ifname);
2571     } else
2572 #elif defined (_AIX)
2573 #else
2574     if (!strcmp(device, "tap")) {
2575         char ifname[64], chkbuf[64];
2576         char setup_script[1024], down_script[1024];
2577         TAPState *s;
2578         int fd;
2579         vlan->nb_host_devs++;
2580         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
2581             static const char * const fd_params[] = {
2582                 "vlan", "name", "fd", "sndbuf", NULL
2583             };
2584             if (check_params(chkbuf, sizeof(chkbuf), fd_params, p) < 0) {
2585                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2586                 ret = -1;
2587                 goto out;
2588             }
2589             fd = strtol(buf, NULL, 0);
2590             fcntl(fd, F_SETFL, O_NONBLOCK);
2591             s = net_tap_fd_init(vlan, device, name, fd);
2592         } else {
2593             static const char * const tap_params[] = {
2594                 "vlan", "name", "ifname", "script", "downscript", "sndbuf", NULL
2595             };
2596             if (check_params(chkbuf, sizeof(chkbuf), tap_params, p) < 0) {
2597                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2598                 ret = -1;
2599                 goto out;
2600             }
2601             if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
2602                 ifname[0] = '\0';
2603             }
2604             if (get_param_value(setup_script, sizeof(setup_script), "script", p) == 0) {
2605                 pstrcpy(setup_script, sizeof(setup_script), DEFAULT_NETWORK_SCRIPT);
2606             }
2607             if (get_param_value(down_script, sizeof(down_script), "downscript", p) == 0) {
2608                 pstrcpy(down_script, sizeof(down_script), DEFAULT_NETWORK_DOWN_SCRIPT);
2609             }
2610             s = net_tap_init(vlan, device, name, ifname, setup_script, down_script);
2611         }
2612         if (s != NULL) {
2613             if (get_param_value(buf, sizeof(buf), "sndbuf", p)) {
2614                 tap_set_sndbuf(s, atoi(buf), mon);
2615             }
2616             ret = 0;
2617         } else {
2618             ret = -1;
2619         }
2620     } else
2621 #endif
2622     if (!strcmp(device, "socket")) {
2623         char chkbuf[64];
2624         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
2625             static const char * const fd_params[] = {
2626                 "vlan", "name", "fd", NULL
2627             };
2628             int fd;
2629             if (check_params(chkbuf, sizeof(chkbuf), fd_params, p) < 0) {
2630                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2631                 ret = -1;
2632                 goto out;
2633             }
2634             fd = strtol(buf, NULL, 0);
2635             ret = -1;
2636             if (net_socket_fd_init(vlan, device, name, fd, 1))
2637                 ret = 0;
2638         } else if (get_param_value(buf, sizeof(buf), "listen", p) > 0) {
2639             static const char * const listen_params[] = {
2640                 "vlan", "name", "listen", NULL
2641             };
2642             if (check_params(chkbuf, sizeof(chkbuf), listen_params, p) < 0) {
2643                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2644                 ret = -1;
2645                 goto out;
2646             }
2647             ret = net_socket_listen_init(vlan, device, name, buf);
2648         } else if (get_param_value(buf, sizeof(buf), "connect", p) > 0) {
2649             static const char * const connect_params[] = {
2650                 "vlan", "name", "connect", NULL
2651             };
2652             if (check_params(chkbuf, sizeof(chkbuf), connect_params, p) < 0) {
2653                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2654                 ret = -1;
2655                 goto out;
2656             }
2657             ret = net_socket_connect_init(vlan, device, name, buf);
2658         } else if (get_param_value(buf, sizeof(buf), "mcast", p) > 0) {
2659             static const char * const mcast_params[] = {
2660                 "vlan", "name", "mcast", NULL
2661             };
2662             if (check_params(chkbuf, sizeof(chkbuf), mcast_params, p) < 0) {
2663                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2664                 ret = -1;
2665                 goto out;
2666             }
2667             ret = net_socket_mcast_init(vlan, device, name, buf);
2668         } else {
2669             config_error(mon, "Unknown socket options: %s\n", p);
2670             ret = -1;
2671             goto out;
2672         }
2673         vlan->nb_host_devs++;
2674     } else
2675 #ifdef CONFIG_VDE
2676     if (!strcmp(device, "vde")) {
2677         static const char * const vde_params[] = {
2678             "vlan", "name", "sock", "port", "group", "mode", NULL
2679         };
2680         char vde_sock[1024], vde_group[512];
2681         int vde_port, vde_mode;
2682
2683         if (check_params(buf, sizeof(buf), vde_params, p) < 0) {
2684             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2685             ret = -1;
2686             goto out;
2687         }
2688         vlan->nb_host_devs++;
2689         if (get_param_value(vde_sock, sizeof(vde_sock), "sock", p) <= 0) {
2690             vde_sock[0] = '\0';
2691         }
2692         if (get_param_value(buf, sizeof(buf), "port", p) > 0) {
2693             vde_port = strtol(buf, NULL, 10);
2694         } else {
2695             vde_port = 0;
2696         }
2697         if (get_param_value(vde_group, sizeof(vde_group), "group", p) <= 0) {
2698             vde_group[0] = '\0';
2699         }
2700         if (get_param_value(buf, sizeof(buf), "mode", p) > 0) {
2701             vde_mode = strtol(buf, NULL, 8);
2702         } else {
2703             vde_mode = 0700;
2704         }
2705         ret = net_vde_init(vlan, device, name, vde_sock, vde_port, vde_group, vde_mode);
2706     } else
2707 #endif
2708     if (!strcmp(device, "dump")) {
2709         int len = 65536;
2710
2711         if (get_param_value(buf, sizeof(buf), "len", p) > 0) {
2712             len = strtol(buf, NULL, 0);
2713         }
2714         if (!get_param_value(buf, sizeof(buf), "file", p)) {
2715             snprintf(buf, sizeof(buf), "qemu-vlan%d.pcap", vlan_id);
2716         }
2717         ret = net_dump_init(mon, vlan, device, name, buf, len);
2718     } else {
2719         config_error(mon, "Unknown network device: %s\n", device);
2720         ret = -1;
2721         goto out;
2722     }
2723     if (ret < 0) {
2724         config_error(mon, "Could not initialize device '%s'\n", device);
2725     }
2726 out:
2727     qemu_free(name);
2728     return ret;
2729 }
2730
2731 void net_client_uninit(NICInfo *nd)
2732 {
2733     nd->vlan->nb_guest_devs--;
2734     nb_nics--;
2735     nd->used = 0;
2736     free((void *)nd->model);
2737 }
2738
2739 static int net_host_check_device(const char *device)
2740 {
2741     int i;
2742     const char *valid_param_list[] = { "tap", "socket", "dump"
2743 #ifdef CONFIG_SLIRP
2744                                        ,"user"
2745 #endif
2746 #ifdef CONFIG_VDE
2747                                        ,"vde"
2748 #endif
2749     };
2750     for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) {
2751         if (!strncmp(valid_param_list[i], device,
2752                      strlen(valid_param_list[i])))
2753             return 1;
2754     }
2755
2756     return 0;
2757 }
2758
2759 void net_host_device_add(Monitor *mon, const char *device, const char *opts)
2760 {
2761     if (!net_host_check_device(device)) {
2762         monitor_printf(mon, "invalid host network device %s\n", device);
2763         return;
2764     }
2765     if (net_client_init(mon, device, opts ? opts : "") < 0) {
2766         monitor_printf(mon, "adding host network device %s failed\n", device);
2767     }
2768 }
2769
2770 void net_host_device_remove(Monitor *mon, int vlan_id, const char *device)
2771 {
2772     VLANClientState *vc;
2773
2774     vc = qemu_find_vlan_client_by_name(mon, vlan_id, device);
2775     if (!vc) {
2776         return;
2777     }
2778     if (!net_host_check_device(vc->model)) {
2779         monitor_printf(mon, "invalid host network device %s\n", device);
2780         return;
2781     }
2782     qemu_del_vlan_client(vc);
2783 }
2784
2785 int net_client_parse(const char *str)
2786 {
2787     const char *p;
2788     char *q;
2789     char device[64];
2790
2791     p = str;
2792     q = device;
2793     while (*p != '\0' && *p != ',') {
2794         if ((q - device) < sizeof(device) - 1)
2795             *q++ = *p;
2796         p++;
2797     }
2798     *q = '\0';
2799     if (*p == ',')
2800         p++;
2801
2802     return net_client_init(NULL, device, p);
2803 }
2804
2805 void net_set_boot_mask(int net_boot_mask)
2806 {
2807     int i;
2808
2809     /* Only the first four NICs may be bootable */
2810     net_boot_mask = net_boot_mask & 0xF;
2811
2812     for (i = 0; i < nb_nics; i++) {
2813         if (net_boot_mask & (1 << i)) {
2814             nd_table[i].bootable = 1;
2815             net_boot_mask &= ~(1 << i);
2816         }
2817     }
2818
2819     if (net_boot_mask) {
2820         fprintf(stderr, "Cannot boot from non-existent NIC\n");
2821         exit(1);
2822     }
2823 }
2824
2825 void do_info_network(Monitor *mon)
2826 {
2827     VLANState *vlan;
2828     VLANClientState *vc;
2829
2830     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2831         monitor_printf(mon, "VLAN %d devices:\n", vlan->id);
2832         for(vc = vlan->first_client; vc != NULL; vc = vc->next)
2833             monitor_printf(mon, "  %s: %s\n", vc->name, vc->info_str);
2834     }
2835 }
2836
2837 int do_set_link(Monitor *mon, const char *name, const char *up_or_down)
2838 {
2839     VLANState *vlan;
2840     VLANClientState *vc = NULL;
2841
2842     for (vlan = first_vlan; vlan != NULL; vlan = vlan->next)
2843         for (vc = vlan->first_client; vc != NULL; vc = vc->next)
2844             if (strcmp(vc->name, name) == 0)
2845                 goto done;
2846 done:
2847
2848     if (!vc) {
2849         monitor_printf(mon, "could not find network device '%s'", name);
2850         return 0;
2851     }
2852
2853     if (strcmp(up_or_down, "up") == 0)
2854         vc->link_down = 0;
2855     else if (strcmp(up_or_down, "down") == 0)
2856         vc->link_down = 1;
2857     else
2858         monitor_printf(mon, "invalid link status '%s'; only 'up' or 'down' "
2859                        "valid\n", up_or_down);
2860
2861     if (vc->link_status_changed)
2862         vc->link_status_changed(vc);
2863
2864     return 1;
2865 }
2866
2867 void net_cleanup(void)
2868 {
2869     VLANState *vlan;
2870
2871     /* close network clients */
2872     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2873         VLANClientState *vc = vlan->first_client;
2874
2875         while (vc) {
2876             VLANClientState *next = vc->next;
2877
2878             qemu_del_vlan_client(vc);
2879
2880             vc = next;
2881         }
2882     }
2883 }
2884
2885 void net_client_check(void)
2886 {
2887     VLANState *vlan;
2888
2889     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2890         if (vlan->nb_guest_devs == 0 && vlan->nb_host_devs == 0)
2891             continue;
2892         if (vlan->nb_guest_devs == 0)
2893             fprintf(stderr, "Warning: vlan %d with no nics\n", vlan->id);
2894         if (vlan->nb_host_devs == 0)
2895             fprintf(stderr,
2896                     "Warning: vlan %d is not connected to host network\n",
2897                     vlan->id);
2898     }
2899 }