net.c

   1 /*
   2  * QEMU System Emulator
   3  *
   4  * Copyright (c) 2003-2008 Fabrice Bellard
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24 #include <unistd.h>
  25 #include <fcntl.h>
  26 #include <signal.h>
  27 #include <time.h>
  28 #include <errno.h>
  29 #include <sys/time.h>
  30 #include <zlib.h>
  31
  32 /* Needed early for CONFIG_BSD etc. */
  33 #include "config-host.h"
  34
  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 CONFIG_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 #include "qemu-common.h"
 105 #include "net.h"
 106 #include "monitor.h"
 107 #include "sysemu.h"
 108 #include "qemu-timer.h"
 109 #include "qemu-char.h"
 110 #include "audio/audio.h"
 111 #include "qemu_socket.h"
 112 #include "qemu-log.h"
 113
 114 #include "slirp/libslirp.h"
 115
 116
 117 static VLANState *first_vlan;
 118
 119 /***********************************************************/
 120 /* network device redirectors */
 121
 122 #if defined(DEBUG_NET) || defined(DEBUG_SLIRP)
 123 static void hex_dump(FILE *f, const uint8_t *buf, int size)
 124 {
 125     int len, i, j, c;
 126
 127     for(i=0;i<size;i+=16) {
 128         len = size - i;
 129         if (len > 16)
 130             len = 16;
 131         fprintf(f, "%08x ", i);
 132         for(j=0;j<16;j++) {
 133             if (j < len)
 134                 fprintf(f, " %02x", buf[i+j]);
 135             else
 136                 fprintf(f, "   ");
 137         }
 138         fprintf(f, " ");
 139         for(j=0;j<len;j++) {
 140             c = buf[i+j];
 141             if (c < ' ' || c > '~')
 142                 c = '.';
 143             fprintf(f, "%c", c);
 144         }
 145         fprintf(f, "\n");
 146     }
 147 }
 148 #endif
 149
 150 static int parse_macaddr(uint8_t *macaddr, const char *p)
 151 {
 152     int i;
 153     char *last_char;
 154     long int offset;
 155
 156     errno = 0;
 157     offset = strtol(p, &last_char, 0);
 158     if (0 == errno && '\0' == *last_char &&
 159             offset >= 0 && offset <= 0xFFFFFF) {
 160         macaddr[3] = (offset & 0xFF0000) >> 16;
 161         macaddr[4] = (offset & 0xFF00) >> 8;
 162         macaddr[5] = offset & 0xFF;
 163         return 0;
 164     } else {
 165         for(i = 0; i < 6; i++) {
 166             macaddr[i] = strtol(p, (char **)&p, 16);
 167             if (i == 5) {
 168                 if (*p != '\0')
 169                     return -1;
 170             } else {
 171                 if (*p != ':' && *p != '-')
 172                     return -1;
 173                 p++;
 174             }
 175         }
 176         return 0;
 177     }
 178
 179     return -1;
 180 }
 181
 182 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
 183 {
 184     const char *p, *p1;
 185     int len;
 186     p = *pp;
 187     p1 = strchr(p, sep);
 188     if (!p1)
 189         return -1;
 190     len = p1 - p;
 191     p1++;
 192     if (buf_size > 0) {
 193         if (len > buf_size - 1)
 194             len = buf_size - 1;
 195         memcpy(buf, p, len);
 196         buf[len] = '\0';
 197     }
 198     *pp = p1;
 199     return 0;
 200 }
 201
 202 int parse_host_src_port(struct sockaddr_in *haddr,
 203                         struct sockaddr_in *saddr,
 204                         const char *input_str)
 205 {
 206     char *str = strdup(input_str);
 207     char *host_str = str;
 208     char *src_str;
 209     const char *src_str2;
 210     char *ptr;
 211
 212     /*
 213      * Chop off any extra arguments at the end of the string which
 214      * would start with a comma, then fill in the src port information
 215      * if it was provided else use the "any address" and "any port".
 216      */
 217     if ((ptr = strchr(str,',')))
 218         *ptr = '\0';
 219
 220     if ((src_str = strchr(input_str,'@'))) {
 221         *src_str = '\0';
 222         src_str++;
 223     }
 224
 225     if (parse_host_port(haddr, host_str) < 0)
 226         goto fail;
 227
 228     src_str2 = src_str;
 229     if (!src_str || *src_str == '\0')
 230         src_str2 = ":0";
 231
 232     if (parse_host_port(saddr, src_str2) < 0)
 233         goto fail;
 234
 235     free(str);
 236     return(0);
 237
 238 fail:
 239     free(str);
 240     return -1;
 241 }
 242
 243 int parse_host_port(struct sockaddr_in *saddr, const char *str)
 244 {
 245     char buf[512];
 246     struct hostent *he;
 247     const char *p, *r;
 248     int port;
 249
 250     p = str;
 251     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 252         return -1;
 253     saddr->sin_family = AF_INET;
 254     if (buf[0] == '\0') {
 255         saddr->sin_addr.s_addr = 0;
 256     } else {
 257         if (qemu_isdigit(buf[0])) {
 258             if (!inet_aton(buf, &saddr->sin_addr))
 259                 return -1;
 260         } else {
 261             if ((he = gethostbyname(buf)) == NULL)
 262                 return - 1;
 263             saddr->sin_addr = *(struct in_addr *)he->h_addr;
 264         }
 265     }
 266     port = strtol(p, (char **)&r, 0);
 267     if (r == p)
 268         return -1;
 269     saddr->sin_port = htons(port);
 270     return 0;
 271 }
 272
 273 void qemu_format_nic_info_str(VLANClientState *vc, uint8_t macaddr[6])
 274 {
 275     snprintf(vc->info_str, sizeof(vc->info_str),
 276              "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x",
 277              vc->model,
 278              macaddr[0], macaddr[1], macaddr[2],
 279              macaddr[3], macaddr[4], macaddr[5]);
 280 }
 281
 282 static char *assign_name(VLANClientState *vc1, const char *model)
 283 {
 284     VLANState *vlan;
 285     char buf[256];
 286     int id = 0;
 287
 288     for (vlan = first_vlan; vlan; vlan = vlan->next) {
 289         VLANClientState *vc;
 290
 291         for (vc = vlan->first_client; vc; vc = vc->next)
 292             if (vc != vc1 && strcmp(vc->model, model) == 0)
 293                 id++;
 294     }
 295
 296     snprintf(buf, sizeof(buf), "%s.%d", model, id);
 297
 298     return strdup(buf);
 299 }
 300
 301 VLANClientState *qemu_new_vlan_client(VLANState *vlan,
 302                                       const char *model,
 303                                       const char *name,
 304                                       NetCanReceive *can_receive,
 305                                       NetReceive *receive,
 306                                       NetReceiveIOV *receive_iov,
 307                                       NetCleanup *cleanup,
 308                                       void *opaque)
 309 {
 310     VLANClientState *vc, **pvc;
 311     vc = qemu_mallocz(sizeof(VLANClientState));
 312     vc->model = strdup(model);
 313     if (name)
 314         vc->name = strdup(name);
 315     else
 316         vc->name = assign_name(vc, model);
 317     vc->can_receive = can_receive;
 318     vc->receive = receive;
 319     vc->receive_iov = receive_iov;
 320     vc->cleanup = cleanup;
 321     vc->opaque = opaque;
 322     vc->vlan = vlan;
 323
 324     vc->next = NULL;
 325     pvc = &vlan->first_client;
 326     while (*pvc != NULL)
 327         pvc = &(*pvc)->next;
 328     *pvc = vc;
 329     return vc;
 330 }
 331
 332 void qemu_del_vlan_client(VLANClientState *vc)
 333 {
 334     VLANClientState **pvc = &vc->vlan->first_client;
 335
 336     while (*pvc != NULL)
 337         if (*pvc == vc) {
 338             *pvc = vc->next;
 339             if (vc->cleanup) {
 340                 vc->cleanup(vc);
 341             }
 342             free(vc->name);
 343             free(vc->model);
 344             qemu_free(vc);
 345             break;
 346         } else
 347             pvc = &(*pvc)->next;
 348 }
 349
 350 VLANClientState *qemu_find_vlan_client(VLANState *vlan, void *opaque)
 351 {
 352     VLANClientState **pvc = &vlan->first_client;
 353
 354     while (*pvc != NULL)
 355         if ((*pvc)->opaque == opaque)
 356             return *pvc;
 357         else
 358             pvc = &(*pvc)->next;
 359
 360     return NULL;
 361 }
 362
 363 static VLANClientState *
 364 qemu_find_vlan_client_by_name(Monitor *mon, int vlan_id,
 365                               const char *client_str)
 366 {
 367     VLANState *vlan;
 368     VLANClientState *vc;
 369
 370     vlan = qemu_find_vlan(vlan_id, 0);
 371     if (!vlan) {
 372         monitor_printf(mon, "unknown VLAN %d\n", vlan_id);
 373         return NULL;
 374     }
 375
 376     for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
 377         if (!strcmp(vc->name, client_str)) {
 378             break;
 379         }
 380     }
 381     if (!vc) {
 382         monitor_printf(mon, "can't find device %s on VLAN %d\n",
 383                        client_str, vlan_id);
 384     }
 385
 386     return vc;
 387 }
 388
 389 int qemu_can_send_packet(VLANClientState *sender)
 390 {
 391     VLANState *vlan = sender->vlan;
 392     VLANClientState *vc;
 393
 394     for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
 395         if (vc == sender) {
 396             continue;
 397         }
 398
 399         /* no can_receive() handler, they can always receive */
 400         if (!vc->can_receive || vc->can_receive(vc)) {
 401             return 1;
 402         }
 403     }
 404     return 0;
 405 }
 406
 407 static int
 408 qemu_deliver_packet(VLANClientState *sender, const uint8_t *buf, int size)
 409 {
 410     VLANClientState *vc;
 411     int ret = -1;
 412
 413     sender->vlan->delivering = 1;
 414
 415     for (vc = sender->vlan->first_client; vc != NULL; vc = vc->next) {
 416         ssize_t len;
 417
 418         if (vc == sender) {
 419             continue;
 420         }
 421
 422         if (vc->link_down) {
 423             ret = size;
 424             continue;
 425         }
 426
 427         len = vc->receive(vc, buf, size);
 428
 429         ret = (ret >= 0) ? ret : len;
 430     }
 431
 432     sender->vlan->delivering = 0;
 433
 434     return ret;
 435 }
 436
 437 void qemu_purge_queued_packets(VLANClientState *vc)
 438 {
 439     VLANPacket *packet, *next;
 440
 441     TAILQ_FOREACH_SAFE(packet, &vc->vlan->send_queue, entry, next) {
 442         if (packet->sender == vc) {
 443             TAILQ_REMOVE(&vc->vlan->send_queue, packet, entry);
 444             qemu_free(packet);
 445         }
 446     }
 447 }
 448
 449 void qemu_flush_queued_packets(VLANClientState *vc)
 450 {
 451     while (!TAILQ_EMPTY(&vc->vlan->send_queue)) {
 452         VLANPacket *packet;
 453         int ret;
 454
 455         packet = TAILQ_FIRST(&vc->vlan->send_queue);
 456         TAILQ_REMOVE(&vc->vlan->send_queue, packet, entry);
 457
 458         ret = qemu_deliver_packet(packet->sender, packet->data, packet->size);
 459         if (ret == 0 && packet->sent_cb != NULL) {
 460             TAILQ_INSERT_HEAD(&vc->vlan->send_queue, packet, entry);
 461             break;
 462         }
 463
 464         if (packet->sent_cb)
 465             packet->sent_cb(packet->sender, ret);
 466
 467         qemu_free(packet);
 468     }
 469 }
 470
 471 static void qemu_enqueue_packet(VLANClientState *sender,
 472                                 const uint8_t *buf, int size,
 473                                 NetPacketSent *sent_cb)
 474 {
 475     VLANPacket *packet;
 476
 477     packet = qemu_malloc(sizeof(VLANPacket) + size);
 478     packet->sender = sender;
 479     packet->size = size;
 480     packet->sent_cb = sent_cb;
 481     memcpy(packet->data, buf, size);
 482
 483     TAILQ_INSERT_TAIL(&sender->vlan->send_queue, packet, entry);
 484 }
 485
 486 ssize_t qemu_send_packet_async(VLANClientState *sender,
 487                                const uint8_t *buf, int size,
 488                                NetPacketSent *sent_cb)
 489 {
 490     int ret;
 491
 492     if (sender->link_down) {
 493         return size;
 494     }
 495
 496 #ifdef DEBUG_NET
 497     printf("vlan %d send:\n", sender->vlan->id);
 498     hex_dump(stdout, buf, size);
 499 #endif
 500
 501     if (sender->vlan->delivering) {
 502         qemu_enqueue_packet(sender, buf, size, NULL);
 503         return size;
 504     }
 505
 506     ret = qemu_deliver_packet(sender, buf, size);
 507     if (ret == 0 && sent_cb != NULL) {
 508         qemu_enqueue_packet(sender, buf, size, sent_cb);
 509         return 0;
 510     }
 511
 512     qemu_flush_queued_packets(sender);
 513
 514     return ret;
 515 }
 516
 517 void qemu_send_packet(VLANClientState *vc, const uint8_t *buf, int size)
 518 {
 519     qemu_send_packet_async(vc, buf, size, NULL);
 520 }
 521
 522 static ssize_t vc_sendv_compat(VLANClientState *vc, const struct iovec *iov,
 523                                int iovcnt)
 524 {
 525     uint8_t buffer[4096];
 526     size_t offset = 0;
 527     int i;
 528
 529     for (i = 0; i < iovcnt; i++) {
 530         size_t len;
 531
 532         len = MIN(sizeof(buffer) - offset, iov[i].iov_len);
 533         memcpy(buffer + offset, iov[i].iov_base, len);
 534         offset += len;
 535     }
 536
 537     return vc->receive(vc, buffer, offset);
 538 }
 539
 540 static ssize_t calc_iov_length(const struct iovec *iov, int iovcnt)
 541 {
 542     size_t offset = 0;
 543     int i;
 544
 545     for (i = 0; i < iovcnt; i++)
 546         offset += iov[i].iov_len;
 547     return offset;
 548 }
 549
 550 static int qemu_deliver_packet_iov(VLANClientState *sender,
 551                                    const struct iovec *iov, int iovcnt)
 552 {
 553     VLANClientState *vc;
 554     int ret = -1;
 555
 556     sender->vlan->delivering = 1;
 557
 558     for (vc = sender->vlan->first_client; vc != NULL; vc = vc->next) {
 559         ssize_t len;
 560
 561         if (vc == sender) {
 562             continue;
 563         }
 564
 565         if (vc->link_down) {
 566             ret = calc_iov_length(iov, iovcnt);
 567             continue;
 568         }
 569
 570         if (vc->receive_iov) {
 571             len = vc->receive_iov(vc, iov, iovcnt);
 572         } else {
 573             len = vc_sendv_compat(vc, iov, iovcnt);
 574         }
 575
 576         ret = (ret >= 0) ? ret : len;
 577     }
 578
 579     sender->vlan->delivering = 0;
 580
 581     return ret;
 582 }
 583
 584 static ssize_t qemu_enqueue_packet_iov(VLANClientState *sender,
 585                                        const struct iovec *iov, int iovcnt,
 586                                        NetPacketSent *sent_cb)
 587 {
 588     VLANPacket *packet;
 589     size_t max_len = 0;
 590     int i;
 591
 592     max_len = calc_iov_length(iov, iovcnt);
 593
 594     packet = qemu_malloc(sizeof(VLANPacket) + max_len);
 595     packet->sender = sender;
 596     packet->sent_cb = sent_cb;
 597     packet->size = 0;
 598
 599     for (i = 0; i < iovcnt; i++) {
 600         size_t len = iov[i].iov_len;
 601
 602         memcpy(packet->data + packet->size, iov[i].iov_base, len);
 603         packet->size += len;
 604     }
 605
 606     TAILQ_INSERT_TAIL(&sender->vlan->send_queue, packet, entry);
 607
 608     return packet->size;
 609 }
 610
 611 ssize_t qemu_sendv_packet_async(VLANClientState *sender,
 612                                 const struct iovec *iov, int iovcnt,
 613                                 NetPacketSent *sent_cb)
 614 {
 615     int ret;
 616
 617     if (sender->link_down) {
 618         return calc_iov_length(iov, iovcnt);
 619     }
 620
 621     if (sender->vlan->delivering) {
 622         return qemu_enqueue_packet_iov(sender, iov, iovcnt, NULL);
 623     }
 624
 625     ret = qemu_deliver_packet_iov(sender, iov, iovcnt);
 626     if (ret == 0 && sent_cb != NULL) {
 627         qemu_enqueue_packet_iov(sender, iov, iovcnt, sent_cb);
 628         return 0;
 629     }
 630
 631     qemu_flush_queued_packets(sender);
 632
 633     return ret;
 634 }
 635
 636 ssize_t
 637 qemu_sendv_packet(VLANClientState *vc, const struct iovec *iov, int iovcnt)
 638 {
 639     return qemu_sendv_packet_async(vc, iov, iovcnt, NULL);
 640 }
 641
 642 static void config_error(Monitor *mon, const char *fmt, ...)
 643 {
 644     va_list ap;
 645
 646     va_start(ap, fmt);
 647     if (mon) {
 648         monitor_vprintf(mon, fmt, ap);
 649     } else {
 650         fprintf(stderr, "qemu: ");
 651         vfprintf(stderr, fmt, ap);
 652         exit(1);
 653     }
 654     va_end(ap);
 655 }
 656
 657 #if defined(CONFIG_SLIRP)
 658
 659 /* slirp network adapter */
 660
 661 #define SLIRP_CFG_HOSTFWD 1
 662 #define SLIRP_CFG_LEGACY  2
 663
 664 struct slirp_config_str {
 665     struct slirp_config_str *next;
 666     int flags;
 667     char str[1024];
 668     int legacy_format;
 669 };
 670
 671 typedef struct SlirpState {
 672     TAILQ_ENTRY(SlirpState) entry;
 673     VLANClientState *vc;
 674     Slirp *slirp;
 675 #ifndef _WIN32
 676     char smb_dir[128];
 677 #endif
 678 } SlirpState;
 679
 680 static struct slirp_config_str *slirp_configs;
 681 const char *legacy_tftp_prefix;
 682 const char *legacy_bootp_filename;
 683 static TAILQ_HEAD(slirp_stacks, SlirpState) slirp_stacks =
 684     TAILQ_HEAD_INITIALIZER(slirp_stacks);
 685
 686 static void slirp_hostfwd(SlirpState *s, Monitor *mon, const char *redir_str,
 687                           int legacy_format);
 688 static void slirp_guestfwd(SlirpState *s, Monitor *mon, const char *config_str,
 689                            int legacy_format);
 690
 691 #ifndef _WIN32
 692 static const char *legacy_smb_export;
 693
 694 static void slirp_smb(SlirpState *s, Monitor *mon, const char *exported_dir,
 695                       struct in_addr vserver_addr);
 696 static void slirp_smb_cleanup(SlirpState *s);
 697 #else
 698 static inline void slirp_smb_cleanup(SlirpState *s) { }
 699 #endif
 700
 701 int slirp_can_output(void *opaque)
 702 {
 703     SlirpState *s = opaque;
 704
 705     return qemu_can_send_packet(s->vc);
 706 }
 707
 708 void slirp_output(void *opaque, const uint8_t *pkt, int pkt_len)
 709 {
 710     SlirpState *s = opaque;
 711
 712 #ifdef DEBUG_SLIRP
 713     printf("slirp output:\n");
 714     hex_dump(stdout, pkt, pkt_len);
 715 #endif
 716     qemu_send_packet(s->vc, pkt, pkt_len);
 717 }
 718
 719 static ssize_t slirp_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
 720 {
 721     SlirpState *s = vc->opaque;
 722
 723 #ifdef DEBUG_SLIRP
 724     printf("slirp input:\n");
 725     hex_dump(stdout, buf, size);
 726 #endif
 727     slirp_input(s->slirp, buf, size);
 728     return size;
 729 }
 730
 731 static void net_slirp_cleanup(VLANClientState *vc)
 732 {
 733     SlirpState *s = vc->opaque;
 734
 735     slirp_cleanup(s->slirp);
 736     slirp_smb_cleanup(s);
 737     TAILQ_REMOVE(&slirp_stacks, s, entry);
 738     qemu_free(s);
 739 }
 740
 741 static int net_slirp_init(Monitor *mon, VLANState *vlan, const char *model,
 742                           const char *name, int restricted,
 743                           const char *vnetwork, const char *vhost,
 744                           const char *vhostname, const char *tftp_export,
 745                           const char *bootfile, const char *vdhcp_start,
 746                           const char *vnameserver, const char *smb_export,
 747                           const char *vsmbserver)
 748 {
 749     /* default settings according to historic slirp */
 750     struct in_addr net  = { .s_addr = htonl(0x0a000200) }; /* 10.0.2.0 */
 751     struct in_addr mask = { .s_addr = htonl(0xffffff00) }; /* 255.255.255.0 */
 752     struct in_addr host = { .s_addr = htonl(0x0a000202) }; /* 10.0.2.2 */
 753     struct in_addr dhcp = { .s_addr = htonl(0x0a00020f) }; /* 10.0.2.15 */
 754     struct in_addr dns  = { .s_addr = htonl(0x0a000203) }; /* 10.0.2.3 */
 755 #ifndef _WIN32
 756     struct in_addr smbsrv = { .s_addr = 0 };
 757 #endif
 758     SlirpState *s;
 759     char buf[20];
 760     uint32_t addr;
 761     int shift;
 762     char *end;
 763
 764     if (!tftp_export) {
 765         tftp_export = legacy_tftp_prefix;
 766     }
 767     if (!bootfile) {
 768         bootfile = legacy_bootp_filename;
 769     }
 770
 771     if (vnetwork) {
 772         if (get_str_sep(buf, sizeof(buf), &vnetwork, '/') < 0) {
 773             if (!inet_aton(vnetwork, &net)) {
 774                 return -1;
 775             }
 776             addr = ntohl(net.s_addr);
 777             if (!(addr & 0x80000000)) {
 778                 mask.s_addr = htonl(0xff000000); /* class A */
 779             } else if ((addr & 0xfff00000) == 0xac100000) {
 780                 mask.s_addr = htonl(0xfff00000); /* priv. 172.16.0.0/12 */
 781             } else if ((addr & 0xc0000000) == 0x80000000) {
 782                 mask.s_addr = htonl(0xffff0000); /* class B */
 783             } else if ((addr & 0xffff0000) == 0xc0a80000) {
 784                 mask.s_addr = htonl(0xffff0000); /* priv. 192.168.0.0/16 */
 785             } else if ((addr & 0xffff0000) == 0xc6120000) {
 786                 mask.s_addr = htonl(0xfffe0000); /* tests 198.18.0.0/15 */
 787             } else if ((addr & 0xe0000000) == 0xe0000000) {
 788                 mask.s_addr = htonl(0xffffff00); /* class C */
 789             } else {
 790                 mask.s_addr = htonl(0xfffffff0); /* multicast/reserved */
 791             }
 792         } else {
 793             if (!inet_aton(buf, &net)) {
 794                 return -1;
 795             }
 796             shift = strtol(vnetwork, &end, 10);
 797             if (*end != '\0') {
 798                 if (!inet_aton(vnetwork, &mask)) {
 799                     return -1;
 800                 }
 801             } else if (shift < 4 || shift > 32) {
 802                 return -1;
 803             } else {
 804                 mask.s_addr = htonl(0xffffffff << (32 - shift));
 805             }
 806         }
 807         net.s_addr &= mask.s_addr;
 808         host.s_addr = net.s_addr | (htonl(0x0202) & ~mask.s_addr);
 809         dhcp.s_addr = net.s_addr | (htonl(0x020f) & ~mask.s_addr);
 810         dns.s_addr  = net.s_addr | (htonl(0x0203) & ~mask.s_addr);
 811     }
 812
 813     if (vhost && !inet_aton(vhost, &host)) {
 814         return -1;
 815     }
 816     if ((host.s_addr & mask.s_addr) != net.s_addr) {
 817         return -1;
 818     }
 819
 820     if (vdhcp_start && !inet_aton(vdhcp_start, &dhcp)) {
 821         return -1;
 822     }
 823     if ((dhcp.s_addr & mask.s_addr) != net.s_addr ||
 824         dhcp.s_addr == host.s_addr || dhcp.s_addr == dns.s_addr) {
 825         return -1;
 826     }
 827
 828     if (vnameserver && !inet_aton(vnameserver, &dns)) {
 829         return -1;
 830     }
 831     if ((dns.s_addr & mask.s_addr) != net.s_addr ||
 832         dns.s_addr == host.s_addr) {
 833         return -1;
 834     }
 835
 836 #ifndef _WIN32
 837     if (vsmbserver && !inet_aton(vsmbserver, &smbsrv)) {
 838         return -1;
 839     }
 840 #endif
 841
 842     s = qemu_mallocz(sizeof(SlirpState));
 843     s->slirp = slirp_init(restricted, net, mask, host, vhostname,
 844                           tftp_export, bootfile, dhcp, dns, s);
 845     TAILQ_INSERT_TAIL(&slirp_stacks, s, entry);
 846
 847     while (slirp_configs) {
 848         struct slirp_config_str *config = slirp_configs;
 849
 850         if (config->flags & SLIRP_CFG_HOSTFWD) {
 851             slirp_hostfwd(s, mon, config->str,
 852                           config->flags & SLIRP_CFG_LEGACY);
 853         } else {
 854             slirp_guestfwd(s, mon, config->str,
 855                            config->flags & SLIRP_CFG_LEGACY);
 856         }
 857         slirp_configs = config->next;
 858         qemu_free(config);
 859     }
 860 #ifndef _WIN32
 861     if (!smb_export) {
 862         smb_export = legacy_smb_export;
 863     }
 864     if (smb_export) {
 865         slirp_smb(s, mon, smb_export, smbsrv);
 866     }
 867 #endif
 868
 869     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, slirp_receive, NULL,
 870                                  net_slirp_cleanup, s);
 871     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
 872              "net=%s, restricted=%c", inet_ntoa(net), restricted ? 'y' : 'n');
 873     return 0;
 874 }
 875
 876 static SlirpState *slirp_lookup(Monitor *mon, const char *vlan,
 877                                 const char *stack)
 878 {
 879     VLANClientState *vc;
 880
 881     if (vlan) {
 882         vc = qemu_find_vlan_client_by_name(mon, strtol(vlan, NULL, 0), stack);
 883         if (!vc) {
 884             return NULL;
 885         }
 886         if (strcmp(vc->model, "user")) {
 887             monitor_printf(mon, "invalid device specified\n");
 888             return NULL;
 889         }
 890         return vc->opaque;
 891     } else {
 892         if (TAILQ_EMPTY(&slirp_stacks)) {
 893             monitor_printf(mon, "user mode network stack not in use\n");
 894             return NULL;
 895         }
 896         return TAILQ_FIRST(&slirp_stacks);
 897     }
 898 }
 899
 900 void net_slirp_hostfwd_remove(Monitor *mon, const char *arg1,
 901                               const char *arg2, const char *arg3)
 902 {
 903     struct in_addr host_addr = { .s_addr = INADDR_ANY };
 904     int host_port;
 905     char buf[256] = "";
 906     const char *src_str, *p;
 907     SlirpState *s;
 908     int is_udp = 0;
 909     int err;
 910
 911     if (arg2) {
 912         s = slirp_lookup(mon, arg1, arg2);
 913         src_str = arg3;
 914     } else {
 915         s = slirp_lookup(mon, NULL, NULL);
 916         src_str = arg1;
 917     }
 918     if (!s) {
 919         return;
 920     }
 921
 922     if (!src_str || !src_str[0])
 923         goto fail_syntax;
 924
 925     p = src_str;
 926     get_str_sep(buf, sizeof(buf), &p, ':');
 927
 928     if (!strcmp(buf, "tcp") || buf[0] == '\0') {
 929         is_udp = 0;
 930     } else if (!strcmp(buf, "udp")) {
 931         is_udp = 1;
 932     } else {
 933         goto fail_syntax;
 934     }
 935
 936     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 937         goto fail_syntax;
 938     }
 939     if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
 940         goto fail_syntax;
 941     }
 942
 943     host_port = atoi(p);
 944
 945     err = slirp_remove_hostfwd(TAILQ_FIRST(&slirp_stacks)->slirp, is_udp,
 946                                host_addr, host_port);
 947
 948     monitor_printf(mon, "host forwarding rule for %s %s\n", src_str,
 949                    err ? "removed" : "not found");
 950     return;
 951
 952  fail_syntax:
 953     monitor_printf(mon, "invalid format\n");
 954 }
 955
 956 static void slirp_hostfwd(SlirpState *s, Monitor *mon, const char *redir_str,
 957                           int legacy_format)
 958 {
 959     struct in_addr host_addr = { .s_addr = INADDR_ANY };
 960     struct in_addr guest_addr = { .s_addr = 0 };
 961     int host_port, guest_port;
 962     const char *p;
 963     char buf[256];
 964     int is_udp;
 965     char *end;
 966
 967     p = redir_str;
 968     if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 969         goto fail_syntax;
 970     }
 971     if (!strcmp(buf, "tcp") || buf[0] == '\0') {
 972         is_udp = 0;
 973     } else if (!strcmp(buf, "udp")) {
 974         is_udp = 1;
 975     } else {
 976         goto fail_syntax;
 977     }
 978
 979     if (!legacy_format) {
 980         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 981             goto fail_syntax;
 982         }
 983         if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
 984             goto fail_syntax;
 985         }
 986     }
 987
 988     if (get_str_sep(buf, sizeof(buf), &p, legacy_format ? ':' : '-') < 0) {
 989         goto fail_syntax;
 990     }
 991     host_port = strtol(buf, &end, 0);
 992     if (*end != '\0' || host_port < 1 || host_port > 65535) {
 993         goto fail_syntax;
 994     }
 995
 996     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 997         goto fail_syntax;
 998     }
 999     if (buf[0] != '\0' && !inet_aton(buf, &guest_addr)) {
1000         goto fail_syntax;
1001     }
1002
1003     guest_port = strtol(p, &end, 0);
1004     if (*end != '\0' || guest_port < 1 || guest_port > 65535) {
1005         goto fail_syntax;
1006     }
1007
1008     if (slirp_add_hostfwd(s->slirp, is_udp, host_addr, host_port, guest_addr,
1009                           guest_port) < 0) {
1010         config_error(mon, "could not set up host forwarding rule '%s'\n",
1011                      redir_str);
1012     }
1013     return;
1014
1015  fail_syntax:
1016     config_error(mon, "invalid host forwarding rule '%s'\n", redir_str);
1017 }
1018
1019 void net_slirp_hostfwd_add(Monitor *mon, const char *arg1,
1020                            const char *arg2, const char *arg3)
1021 {
1022     const char *redir_str;
1023     SlirpState *s;
1024
1025     if (arg2) {
1026         s = slirp_lookup(mon, arg1, arg2);
1027         redir_str = arg3;
1028     } else {
1029         s = slirp_lookup(mon, NULL, NULL);
1030         redir_str = arg1;
1031     }
1032     if (s) {
1033         slirp_hostfwd(s, mon, redir_str, 0);
1034     }
1035
1036 }
1037
1038 void net_slirp_redir(const char *redir_str)
1039 {
1040     struct slirp_config_str *config;
1041
1042     if (TAILQ_EMPTY(&slirp_stacks)) {
1043         config = qemu_malloc(sizeof(*config));
1044         pstrcpy(config->str, sizeof(config->str), redir_str);
1045         config->flags = SLIRP_CFG_HOSTFWD | SLIRP_CFG_LEGACY;
1046         config->next = slirp_configs;
1047         slirp_configs = config;
1048         return;
1049     }
1050
1051     slirp_hostfwd(TAILQ_FIRST(&slirp_stacks), NULL, redir_str, 1);
1052 }
1053
1054 #ifndef _WIN32
1055
1056 /* automatic user mode samba server configuration */
1057 static void slirp_smb_cleanup(SlirpState *s)
1058 {
1059     char cmd[128];
1060
1061     if (s->smb_dir[0] != '\0') {
1062         snprintf(cmd, sizeof(cmd), "rm -rf %s", s->smb_dir);
1063         system(cmd);
1064         s->smb_dir[0] = '\0';
1065     }
1066 }
1067
1068 static void slirp_smb(SlirpState* s, Monitor *mon, const char *exported_dir,
1069                       struct in_addr vserver_addr)
1070 {
1071     static int instance;
1072     char smb_conf[128];
1073     char smb_cmdline[128];
1074     FILE *f;
1075
1076     snprintf(s->smb_dir, sizeof(s->smb_dir), "/tmp/qemu-smb.%ld-%d",
1077              (long)getpid(), instance++);
1078     if (mkdir(s->smb_dir, 0700) < 0) {
1079         config_error(mon, "could not create samba server dir '%s'\n",
1080                      s->smb_dir);
1081         return;
1082     }
1083     snprintf(smb_conf, sizeof(smb_conf), "%s/%s", s->smb_dir, "smb.conf");
1084
1085     f = fopen(smb_conf, "w");
1086     if (!f) {
1087         slirp_smb_cleanup(s);
1088         config_error(mon, "could not create samba server "
1089                      "configuration file '%s'\n", smb_conf);
1090         return;
1091     }
1092     fprintf(f,
1093             "[global]\n"
1094             "private dir=%s\n"
1095             "smb ports=0\n"
1096             "socket address=127.0.0.1\n"
1097             "pid directory=%s\n"
1098             "lock directory=%s\n"
1099             "log file=%s/log.smbd\n"
1100             "smb passwd file=%s/smbpasswd\n"
1101             "security = share\n"
1102             "[qemu]\n"
1103             "path=%s\n"
1104             "read only=no\n"
1105             "guest ok=yes\n",
1106             s->smb_dir,
1107             s->smb_dir,
1108             s->smb_dir,
1109             s->smb_dir,
1110             s->smb_dir,
1111             exported_dir
1112             );
1113     fclose(f);
1114
1115     snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -s %s",
1116              SMBD_COMMAND, smb_conf);
1117
1118     if (slirp_add_exec(s->slirp, 0, smb_cmdline, &vserver_addr, 139) < 0) {
1119         slirp_smb_cleanup(s);
1120         config_error(mon, "conflicting/invalid smbserver address\n");
1121     }
1122 }
1123
1124 /* automatic user mode samba server configuration (legacy interface) */
1125 void net_slirp_smb(const char *exported_dir)
1126 {
1127     struct in_addr vserver_addr = { .s_addr = 0 };
1128
1129     if (legacy_smb_export) {
1130         fprintf(stderr, "-smb given twice\n");
1131         exit(1);
1132     }
1133     legacy_smb_export = exported_dir;
1134     if (!TAILQ_EMPTY(&slirp_stacks)) {
1135         slirp_smb(TAILQ_FIRST(&slirp_stacks), NULL, exported_dir,
1136                   vserver_addr);
1137     }
1138 }
1139
1140 #endif /* !defined(_WIN32) */
1141
1142 struct GuestFwd {
1143     CharDriverState *hd;
1144     struct in_addr server;
1145     int port;
1146     Slirp *slirp;
1147 };
1148
1149 static int guestfwd_can_read(void *opaque)
1150 {
1151     struct GuestFwd *fwd = opaque;
1152     return slirp_socket_can_recv(fwd->slirp, fwd->server, fwd->port);
1153 }
1154
1155 static void guestfwd_read(void *opaque, const uint8_t *buf, int size)
1156 {
1157     struct GuestFwd *fwd = opaque;
1158     slirp_socket_recv(fwd->slirp, fwd->server, fwd->port, buf, size);
1159 }
1160
1161 static void slirp_guestfwd(SlirpState *s, Monitor *mon, const char *config_str,
1162                            int legacy_format)
1163 {
1164     struct in_addr server = { .s_addr = 0 };
1165     struct GuestFwd *fwd;
1166     const char *p;
1167     char buf[128];
1168     char *end;
1169     int port;
1170
1171     p = config_str;
1172     if (legacy_format) {
1173         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1174             goto fail_syntax;
1175         }
1176     } else {
1177         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1178             goto fail_syntax;
1179         }
1180         if (strcmp(buf, "tcp") && buf[0] != '\0') {
1181             goto fail_syntax;
1182         }
1183         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1184             goto fail_syntax;
1185         }
1186         if (buf[0] != '\0' && !inet_aton(buf, &server)) {
1187             goto fail_syntax;
1188         }
1189         if (get_str_sep(buf, sizeof(buf), &p, '-') < 0) {
1190             goto fail_syntax;
1191         }
1192     }
1193     port = strtol(buf, &end, 10);
1194     if (*end != '\0' || port < 1 || port > 65535) {
1195         goto fail_syntax;
1196     }
1197
1198     fwd = qemu_malloc(sizeof(struct GuestFwd));
1199     snprintf(buf, sizeof(buf), "guestfwd.tcp:%d", port);
1200     fwd->hd = qemu_chr_open(buf, p, NULL);
1201     if (!fwd->hd) {
1202         config_error(mon, "could not open guest forwarding device '%s'\n",
1203                      buf);
1204         qemu_free(fwd);
1205         return;
1206     }
1207
1208     if (slirp_add_exec(s->slirp, 3, fwd->hd, &server, port) < 0) {
1209         config_error(mon, "conflicting/invalid host:port in guest forwarding "
1210                      "rule '%s'\n", config_str);
1211         qemu_free(fwd);
1212         return;
1213     }
1214     fwd->server = server;
1215     fwd->port = port;
1216     fwd->slirp = s->slirp;
1217
1218     qemu_chr_add_handlers(fwd->hd, guestfwd_can_read, guestfwd_read,
1219                           NULL, fwd);
1220     return;
1221
1222  fail_syntax:
1223     config_error(mon, "invalid guest forwarding rule '%s'\n", config_str);
1224 }
1225
1226 void do_info_usernet(Monitor *mon)
1227 {
1228     SlirpState *s;
1229
1230     TAILQ_FOREACH(s, &slirp_stacks, entry) {
1231         monitor_printf(mon, "VLAN %d (%s):\n", s->vc->vlan->id, s->vc->name);
1232         slirp_connection_info(s->slirp, mon);
1233     }
1234 }
1235
1236 #endif /* CONFIG_SLIRP */
1237
1238 #if !defined(_WIN32)
1239
1240 typedef struct TAPState {
1241     VLANClientState *vc;
1242     int fd;
1243     char down_script[1024];
1244     char down_script_arg[128];
1245     uint8_t buf[4096];
1246     unsigned int read_poll : 1;
1247     unsigned int write_poll : 1;
1248 } TAPState;
1249
1250 static int launch_script(const char *setup_script, const char *ifname, int fd);
1251
1252 static int tap_can_send(void *opaque);
1253 static void tap_send(void *opaque);
1254 static void tap_writable(void *opaque);
1255
1256 static void tap_update_fd_handler(TAPState *s)
1257 {
1258     qemu_set_fd_handler2(s->fd,
1259                          s->read_poll  ? tap_can_send : NULL,
1260                          s->read_poll  ? tap_send     : NULL,
1261                          s->write_poll ? tap_writable : NULL,
1262                          s);
1263 }
1264
1265 static void tap_read_poll(TAPState *s, int enable)
1266 {
1267     s->read_poll = !!enable;
1268     tap_update_fd_handler(s);
1269 }
1270
1271 static void tap_write_poll(TAPState *s, int enable)
1272 {
1273     s->write_poll = !!enable;
1274     tap_update_fd_handler(s);
1275 }
1276
1277 static void tap_writable(void *opaque)
1278 {
1279     TAPState *s = opaque;
1280
1281     tap_write_poll(s, 0);
1282
1283     qemu_flush_queued_packets(s->vc);
1284 }
1285
1286 static ssize_t tap_receive_iov(VLANClientState *vc, const struct iovec *iov,
1287                                int iovcnt)
1288 {
1289     TAPState *s = vc->opaque;
1290     ssize_t len;
1291
1292     do {
1293         len = writev(s->fd, iov, iovcnt);
1294     } while (len == -1 && errno == EINTR);
1295
1296     if (len == -1 && errno == EAGAIN) {
1297         tap_write_poll(s, 1);
1298         return 0;
1299     }
1300
1301     return len;
1302 }
1303
1304 static ssize_t tap_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1305 {
1306     TAPState *s = vc->opaque;
1307     ssize_t len;
1308
1309     do {
1310         len = write(s->fd, buf, size);
1311     } while (len == -1 && (errno == EINTR || errno == EAGAIN));
1312
1313     return len;
1314 }
1315
1316 static int tap_can_send(void *opaque)
1317 {
1318     TAPState *s = opaque;
1319
1320     return qemu_can_send_packet(s->vc);
1321 }
1322
1323 #ifdef __sun__
1324 static ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
1325 {
1326     struct strbuf sbuf;
1327     int f = 0;
1328
1329     sbuf.maxlen = maxlen;
1330     sbuf.buf = (char *)buf;
1331
1332     return getmsg(tapfd, NULL, &sbuf, &f) >= 0 ? sbuf.len : -1;
1333 }
1334 #else
1335 static ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
1336 {
1337     return read(tapfd, buf, maxlen);
1338 }
1339 #endif
1340
1341 static void tap_send_completed(VLANClientState *vc, ssize_t len)
1342 {
1343     TAPState *s = vc->opaque;
1344     tap_read_poll(s, 1);
1345 }
1346
1347 static void tap_send(void *opaque)
1348 {
1349     TAPState *s = opaque;
1350     int size;
1351
1352     do {
1353         size = tap_read_packet(s->fd, s->buf, sizeof(s->buf));
1354         if (size <= 0) {
1355             break;
1356         }
1357
1358         size = qemu_send_packet_async(s->vc, s->buf, size, tap_send_completed);
1359         if (size == 0) {
1360             tap_read_poll(s, 0);
1361         }
1362     } while (size > 0);
1363 }
1364
1365 #ifdef TUNSETSNDBUF
1366 /* sndbuf should be set to a value lower than the tx queue
1367  * capacity of any destination network interface.
1368  * Ethernet NICs generally have txqueuelen=1000, so 1Mb is
1369  * a good default, given a 1500 byte MTU.
1370  */
1371 #define TAP_DEFAULT_SNDBUF 1024*1024
1372
1373 static void tap_set_sndbuf(TAPState *s, const char *sndbuf_str, Monitor *mon)
1374 {
1375     int sndbuf = TAP_DEFAULT_SNDBUF;
1376
1377     if (sndbuf_str) {
1378         sndbuf = atoi(sndbuf_str);
1379     }
1380
1381     if (!sndbuf) {
1382         sndbuf = INT_MAX;
1383     }
1384
1385     if (ioctl(s->fd, TUNSETSNDBUF, &sndbuf) == -1 && sndbuf_str) {
1386         config_error(mon, "TUNSETSNDBUF ioctl failed: %s\n",
1387                      strerror(errno));
1388     }
1389 }
1390 #else
1391 static void tap_set_sndbuf(TAPState *s, const char *sndbuf_str, Monitor *mon)
1392 {
1393     if (sndbuf_str) {
1394         config_error(mon, "No '-net tap,sndbuf=<nbytes>' support available\n");
1395     }
1396 }
1397 #endif /* TUNSETSNDBUF */
1398
1399 static void tap_cleanup(VLANClientState *vc)
1400 {
1401     TAPState *s = vc->opaque;
1402
1403     qemu_purge_queued_packets(vc);
1404
1405     if (s->down_script[0])
1406         launch_script(s->down_script, s->down_script_arg, s->fd);
1407
1408     tap_read_poll(s, 0);
1409     tap_write_poll(s, 0);
1410     close(s->fd);
1411     qemu_free(s);
1412 }
1413
1414 /* fd support */
1415
1416 static TAPState *net_tap_fd_init(VLANState *vlan,
1417                                  const char *model,
1418                                  const char *name,
1419                                  int fd)
1420 {
1421     TAPState *s;
1422
1423     s = qemu_mallocz(sizeof(TAPState));
1424     s->fd = fd;
1425     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, tap_receive,
1426                                  tap_receive_iov, tap_cleanup, s);
1427     tap_read_poll(s, 1);
1428     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "fd=%d", fd);
1429     return s;
1430 }
1431
1432 #if defined (CONFIG_BSD) || defined (__FreeBSD_kernel__)
1433 static int tap_open(char *ifname, int ifname_size)
1434 {
1435     int fd;
1436     char *dev;
1437     struct stat s;
1438
1439     TFR(fd = open("/dev/tap", O_RDWR));
1440     if (fd < 0) {
1441         fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n");
1442         return -1;
1443     }
1444
1445     fstat(fd, &s);
1446     dev = devname(s.st_rdev, S_IFCHR);
1447     pstrcpy(ifname, ifname_size, dev);
1448
1449     fcntl(fd, F_SETFL, O_NONBLOCK);
1450     return fd;
1451 }
1452 #elif defined(__sun__)
1453 #define TUNNEWPPA       (('T'<<16) | 0x0001)
1454 /*
1455  * Allocate TAP device, returns opened fd.
1456  * Stores dev name in the first arg(must be large enough).
1457  */
1458 static int tap_alloc(char *dev, size_t dev_size)
1459 {
1460     int tap_fd, if_fd, ppa = -1;
1461     static int ip_fd = 0;
1462     char *ptr;
1463
1464     static int arp_fd = 0;
1465     int ip_muxid, arp_muxid;
1466     struct strioctl  strioc_if, strioc_ppa;
1467     int link_type = I_PLINK;;
1468     struct lifreq ifr;
1469     char actual_name[32] = "";
1470
1471     memset(&ifr, 0x0, sizeof(ifr));
1472
1473     if( *dev ){
1474        ptr = dev;
1475        while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
1476        ppa = atoi(ptr);
1477     }
1478
1479     /* Check if IP device was opened */
1480     if( ip_fd )
1481        close(ip_fd);
1482
1483     TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
1484     if (ip_fd < 0) {
1485        syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)");
1486        return -1;
1487     }
1488
1489     TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
1490     if (tap_fd < 0) {
1491        syslog(LOG_ERR, "Can't open /dev/tap");
1492        return -1;
1493     }
1494
1495     /* Assign a new PPA and get its unit number. */
1496     strioc_ppa.ic_cmd = TUNNEWPPA;
1497     strioc_ppa.ic_timout = 0;
1498     strioc_ppa.ic_len = sizeof(ppa);
1499     strioc_ppa.ic_dp = (char *)&ppa;
1500     if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
1501        syslog (LOG_ERR, "Can't assign new interface");
1502
1503     TFR(if_fd = open("/dev/tap", O_RDWR, 0));
1504     if (if_fd < 0) {
1505        syslog(LOG_ERR, "Can't open /dev/tap (2)");
1506        return -1;
1507     }
1508     if(ioctl(if_fd, I_PUSH, "ip") < 0){
1509        syslog(LOG_ERR, "Can't push IP module");
1510        return -1;
1511     }
1512
1513     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
1514         syslog(LOG_ERR, "Can't get flags\n");
1515
1516     snprintf (actual_name, 32, "tap%d", ppa);
1517     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
1518
1519     ifr.lifr_ppa = ppa;
1520     /* Assign ppa according to the unit number returned by tun device */
1521
1522     if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
1523         syslog (LOG_ERR, "Can't set PPA %d", ppa);
1524     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
1525         syslog (LOG_ERR, "Can't get flags\n");
1526     /* Push arp module to if_fd */
1527     if (ioctl (if_fd, I_PUSH, "arp") < 0)
1528         syslog (LOG_ERR, "Can't push ARP module (2)");
1529
1530     /* Push arp module to ip_fd */
1531     if (ioctl (ip_fd, I_POP, NULL) < 0)
1532         syslog (LOG_ERR, "I_POP failed\n");
1533     if (ioctl (ip_fd, I_PUSH, "arp") < 0)
1534         syslog (LOG_ERR, "Can't push ARP module (3)\n");
1535     /* Open arp_fd */
1536     TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
1537     if (arp_fd < 0)
1538        syslog (LOG_ERR, "Can't open %s\n", "/dev/tap");
1539
1540     /* Set ifname to arp */
1541     strioc_if.ic_cmd = SIOCSLIFNAME;
1542     strioc_if.ic_timout = 0;
1543     strioc_if.ic_len = sizeof(ifr);
1544     strioc_if.ic_dp = (char *)&ifr;
1545     if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
1546         syslog (LOG_ERR, "Can't set ifname to arp\n");
1547     }
1548
1549     if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
1550        syslog(LOG_ERR, "Can't link TAP device to IP");
1551        return -1;
1552     }
1553
1554     if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
1555         syslog (LOG_ERR, "Can't link TAP device to ARP");
1556
1557     close (if_fd);
1558
1559     memset(&ifr, 0x0, sizeof(ifr));
1560     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
1561     ifr.lifr_ip_muxid  = ip_muxid;
1562     ifr.lifr_arp_muxid = arp_muxid;
1563
1564     if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
1565     {
1566       ioctl (ip_fd, I_PUNLINK , arp_muxid);
1567       ioctl (ip_fd, I_PUNLINK, ip_muxid);
1568       syslog (LOG_ERR, "Can't set multiplexor id");
1569     }
1570
1571     snprintf(dev, dev_size, "tap%d", ppa);
1572     return tap_fd;
1573 }
1574
1575 static int tap_open(char *ifname, int ifname_size)
1576 {
1577     char  dev[10]="";
1578     int fd;
1579     if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){
1580        fprintf(stderr, "Cannot allocate TAP device\n");
1581        return -1;
1582     }
1583     pstrcpy(ifname, ifname_size, dev);
1584     fcntl(fd, F_SETFL, O_NONBLOCK);
1585     return fd;
1586 }
1587 #elif defined (_AIX)
1588 static int tap_open(char *ifname, int ifname_size)
1589 {
1590     fprintf (stderr, "no tap on AIX\n");
1591     return -1;
1592 }
1593 #else
1594 static int tap_open(char *ifname, int ifname_size)
1595 {
1596     struct ifreq ifr;
1597     int fd, ret;
1598
1599     TFR(fd = open("/dev/net/tun", O_RDWR));
1600     if (fd < 0) {
1601         fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n");
1602         return -1;
1603     }
1604     memset(&ifr, 0, sizeof(ifr));
1605     ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
1606     if (ifname[0] != '\0')
1607         pstrcpy(ifr.ifr_name, IFNAMSIZ, ifname);
1608     else
1609         pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d");
1610     ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
1611     if (ret != 0) {
1612         fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n");
1613         close(fd);
1614         return -1;
1615     }
1616     pstrcpy(ifname, ifname_size, ifr.ifr_name);
1617     fcntl(fd, F_SETFL, O_NONBLOCK);
1618     return fd;
1619 }
1620 #endif
1621
1622 static int launch_script(const char *setup_script, const char *ifname, int fd)
1623 {
1624     sigset_t oldmask, mask;
1625     int pid, status;
1626     char *args[3];
1627     char **parg;
1628
1629     sigemptyset(&mask);
1630     sigaddset(&mask, SIGCHLD);
1631     sigprocmask(SIG_BLOCK, &mask, &oldmask);
1632
1633     /* try to launch network script */
1634     pid = fork();
1635     if (pid == 0) {
1636         int open_max = sysconf(_SC_OPEN_MAX), i;
1637
1638         for (i = 0; i < open_max; i++) {
1639             if (i != STDIN_FILENO &&
1640                 i != STDOUT_FILENO &&
1641                 i != STDERR_FILENO &&
1642                 i != fd) {
1643                 close(i);
1644             }
1645         }
1646         parg = args;
1647         *parg++ = (char *)setup_script;
1648         *parg++ = (char *)ifname;
1649         *parg++ = NULL;
1650         execv(setup_script, args);
1651         _exit(1);
1652     } else if (pid > 0) {
1653         while (waitpid(pid, &status, 0) != pid) {
1654             /* loop */
1655         }
1656         sigprocmask(SIG_SETMASK, &oldmask, NULL);
1657
1658         if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
1659             return 0;
1660         }
1661     }
1662     fprintf(stderr, "%s: could not launch network script\n", setup_script);
1663     return -1;
1664 }
1665
1666 static TAPState *net_tap_init(VLANState *vlan, const char *model,
1667                               const char *name, const char *ifname1,
1668                               const char *setup_script, const char *down_script)
1669 {
1670     TAPState *s;
1671     int fd;
1672     char ifname[128];
1673
1674     if (ifname1 != NULL)
1675         pstrcpy(ifname, sizeof(ifname), ifname1);
1676     else
1677         ifname[0] = '\0';
1678     TFR(fd = tap_open(ifname, sizeof(ifname)));
1679     if (fd < 0)
1680         return NULL;
1681
1682     if (!setup_script || !strcmp(setup_script, "no"))
1683         setup_script = "";
1684     if (setup_script[0] != '\0' &&
1685         launch_script(setup_script, ifname, fd)) {
1686         return NULL;
1687     }
1688     s = net_tap_fd_init(vlan, model, name, fd);
1689     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1690              "ifname=%s,script=%s,downscript=%s",
1691              ifname, setup_script, down_script);
1692     if (down_script && strcmp(down_script, "no")) {
1693         snprintf(s->down_script, sizeof(s->down_script), "%s", down_script);
1694         snprintf(s->down_script_arg, sizeof(s->down_script_arg), "%s", ifname);
1695     }
1696     return s;
1697 }
1698
1699 #endif /* !_WIN32 */
1700
1701 #if defined(CONFIG_VDE)
1702 typedef struct VDEState {
1703     VLANClientState *vc;
1704     VDECONN *vde;
1705 } VDEState;
1706
1707 static void vde_to_qemu(void *opaque)
1708 {
1709     VDEState *s = opaque;
1710     uint8_t buf[4096];
1711     int size;
1712
1713     size = vde_recv(s->vde, (char *)buf, sizeof(buf), 0);
1714     if (size > 0) {
1715         qemu_send_packet(s->vc, buf, size);
1716     }
1717 }
1718
1719 static ssize_t vde_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1720 {
1721     VDEState *s = vc->opaque;
1722     ssize_t ret;
1723
1724     do {
1725       ret = vde_send(s->vde, (const char *)buf, size, 0);
1726     } while (ret < 0 && errno == EINTR);
1727
1728     return ret;
1729 }
1730
1731 static void vde_cleanup(VLANClientState *vc)
1732 {
1733     VDEState *s = vc->opaque;
1734     qemu_set_fd_handler(vde_datafd(s->vde), NULL, NULL, NULL);
1735     vde_close(s->vde);
1736     qemu_free(s);
1737 }
1738
1739 static int net_vde_init(VLANState *vlan, const char *model,
1740                         const char *name, const char *sock,
1741                         int port, const char *group, int mode)
1742 {
1743     VDEState *s;
1744     char *init_group = strlen(group) ? (char *)group : NULL;
1745     char *init_sock = strlen(sock) ? (char *)sock : NULL;
1746
1747     struct vde_open_args args = {
1748         .port = port,
1749         .group = init_group,
1750         .mode = mode,
1751     };
1752
1753     s = qemu_mallocz(sizeof(VDEState));
1754     s->vde = vde_open(init_sock, (char *)"QEMU", &args);
1755     if (!s->vde){
1756         free(s);
1757         return -1;
1758     }
1759     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, vde_receive,
1760                                  NULL, vde_cleanup, s);
1761     qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
1762     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "sock=%s,fd=%d",
1763              sock, vde_datafd(s->vde));
1764     return 0;
1765 }
1766 #endif
1767
1768 /* network connection */
1769 typedef struct NetSocketState {
1770     VLANClientState *vc;
1771     int fd;
1772     int state; /* 0 = getting length, 1 = getting data */
1773     unsigned int index;
1774     unsigned int packet_len;
1775     uint8_t buf[4096];
1776     struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
1777 } NetSocketState;
1778
1779 typedef struct NetSocketListenState {
1780     VLANState *vlan;
1781     char *model;
1782     char *name;
1783     int fd;
1784 } NetSocketListenState;
1785
1786 /* XXX: we consider we can send the whole packet without blocking */
1787 static ssize_t net_socket_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1788 {
1789     NetSocketState *s = vc->opaque;
1790     uint32_t len;
1791     len = htonl(size);
1792
1793     send_all(s->fd, (const uint8_t *)&len, sizeof(len));
1794     return send_all(s->fd, buf, size);
1795 }
1796
1797 static ssize_t net_socket_receive_dgram(VLANClientState *vc, const uint8_t *buf, size_t size)
1798 {
1799     NetSocketState *s = vc->opaque;
1800
1801     return sendto(s->fd, (const void *)buf, size, 0,
1802                   (struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst));
1803 }
1804
1805 static void net_socket_send(void *opaque)
1806 {
1807     NetSocketState *s = opaque;
1808     int size, err;
1809     unsigned l;
1810     uint8_t buf1[4096];
1811     const uint8_t *buf;
1812
1813     size = recv(s->fd, (void *)buf1, sizeof(buf1), 0);
1814     if (size < 0) {
1815         err = socket_error();
1816         if (err != EWOULDBLOCK)
1817             goto eoc;
1818     } else if (size == 0) {
1819         /* end of connection */
1820     eoc:
1821         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1822         closesocket(s->fd);
1823         return;
1824     }
1825     buf = buf1;
1826     while (size > 0) {
1827         /* reassemble a packet from the network */
1828         switch(s->state) {
1829         case 0:
1830             l = 4 - s->index;
1831             if (l > size)
1832                 l = size;
1833             memcpy(s->buf + s->index, buf, l);
1834             buf += l;
1835             size -= l;
1836             s->index += l;
1837             if (s->index == 4) {
1838                 /* got length */
1839                 s->packet_len = ntohl(*(uint32_t *)s->buf);
1840                 s->index = 0;
1841                 s->state = 1;
1842             }
1843             break;
1844         case 1:
1845             l = s->packet_len - s->index;
1846             if (l > size)
1847                 l = size;
1848             if (s->index + l <= sizeof(s->buf)) {
1849                 memcpy(s->buf + s->index, buf, l);
1850             } else {
1851                 fprintf(stderr, "serious error: oversized packet received,"
1852                     "connection terminated.\n");
1853                 s->state = 0;
1854                 goto eoc;
1855             }
1856
1857             s->index += l;
1858             buf += l;
1859             size -= l;
1860             if (s->index >= s->packet_len) {
1861                 qemu_send_packet(s->vc, s->buf, s->packet_len);
1862                 s->index = 0;
1863                 s->state = 0;
1864             }
1865             break;
1866         }
1867     }
1868 }
1869
1870 static void net_socket_send_dgram(void *opaque)
1871 {
1872     NetSocketState *s = opaque;
1873     int size;
1874
1875     size = recv(s->fd, (void *)s->buf, sizeof(s->buf), 0);
1876     if (size < 0)
1877         return;
1878     if (size == 0) {
1879         /* end of connection */
1880         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1881         return;
1882     }
1883     qemu_send_packet(s->vc, s->buf, size);
1884 }
1885
1886 static int net_socket_mcast_create(struct sockaddr_in *mcastaddr)
1887 {
1888     struct ip_mreq imr;
1889     int fd;
1890     int val, ret;
1891     if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
1892         fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n",
1893                 inet_ntoa(mcastaddr->sin_addr),
1894                 (int)ntohl(mcastaddr->sin_addr.s_addr));
1895         return -1;
1896
1897     }
1898     fd = socket(PF_INET, SOCK_DGRAM, 0);
1899     if (fd < 0) {
1900         perror("socket(PF_INET, SOCK_DGRAM)");
1901         return -1;
1902     }
1903
1904     val = 1;
1905     ret=setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
1906                    (const char *)&val, sizeof(val));
1907     if (ret < 0) {
1908         perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
1909         goto fail;
1910     }
1911
1912     ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
1913     if (ret < 0) {
1914         perror("bind");
1915         goto fail;
1916     }
1917
1918     /* Add host to multicast group */
1919     imr.imr_multiaddr = mcastaddr->sin_addr;
1920     imr.imr_interface.s_addr = htonl(INADDR_ANY);
1921
1922     ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1923                      (const char *)&imr, sizeof(struct ip_mreq));
1924     if (ret < 0) {
1925         perror("setsockopt(IP_ADD_MEMBERSHIP)");
1926         goto fail;
1927     }
1928
1929     /* Force mcast msgs to loopback (eg. several QEMUs in same host */
1930     val = 1;
1931     ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1932                    (const char *)&val, sizeof(val));
1933     if (ret < 0) {
1934         perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
1935         goto fail;
1936     }
1937
1938     socket_set_nonblock(fd);
1939     return fd;
1940 fail:
1941     if (fd >= 0)
1942         closesocket(fd);
1943     return -1;
1944 }
1945
1946 static void net_socket_cleanup(VLANClientState *vc)
1947 {
1948     NetSocketState *s = vc->opaque;
1949     qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1950     close(s->fd);
1951     qemu_free(s);
1952 }
1953
1954 static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
1955                                                 const char *model,
1956                                                 const char *name,
1957                                                 int fd, int is_connected)
1958 {
1959     struct sockaddr_in saddr;
1960     int newfd;
1961     socklen_t saddr_len;
1962     NetSocketState *s;
1963
1964     /* fd passed: multicast: "learn" dgram_dst address from bound address and save it
1965      * Because this may be "shared" socket from a "master" process, datagrams would be recv()
1966      * by ONLY ONE process: we must "clone" this dgram socket --jjo
1967      */
1968
1969     if (is_connected) {
1970         if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
1971             /* must be bound */
1972             if (saddr.sin_addr.s_addr==0) {
1973                 fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, cannot setup multicast dst addr\n",
1974                         fd);
1975                 return NULL;
1976             }
1977             /* clone dgram socket */
1978             newfd = net_socket_mcast_create(&saddr);
1979             if (newfd < 0) {
1980                 /* error already reported by net_socket_mcast_create() */
1981                 close(fd);
1982                 return NULL;
1983             }
1984             /* clone newfd to fd, close newfd */
1985             dup2(newfd, fd);
1986             close(newfd);
1987
1988         } else {
1989             fprintf(stderr, "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
1990                     fd, strerror(errno));
1991             return NULL;
1992         }
1993     }
1994
1995     s = qemu_mallocz(sizeof(NetSocketState));
1996     s->fd = fd;
1997
1998     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, net_socket_receive_dgram,
1999                                  NULL, net_socket_cleanup, s);
2000     qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s);
2001
2002     /* mcast: save bound address as dst */
2003     if (is_connected) s->dgram_dst=saddr;
2004
2005     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2006             "socket: fd=%d (%s mcast=%s:%d)",
2007             fd, is_connected? "cloned" : "",
2008             inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2009     return s;
2010 }
2011
2012 static void net_socket_connect(void *opaque)
2013 {
2014     NetSocketState *s = opaque;
2015     qemu_set_fd_handler(s->fd, net_socket_send, NULL, s);
2016 }
2017
2018 static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
2019                                                  const char *model,
2020                                                  const char *name,
2021                                                  int fd, int is_connected)
2022 {
2023     NetSocketState *s;
2024     s = qemu_mallocz(sizeof(NetSocketState));
2025     s->fd = fd;
2026     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, net_socket_receive,
2027                                  NULL, net_socket_cleanup, s);
2028     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2029              "socket: fd=%d", fd);
2030     if (is_connected) {
2031         net_socket_connect(s);
2032     } else {
2033         qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
2034     }
2035     return s;
2036 }
2037
2038 static NetSocketState *net_socket_fd_init(VLANState *vlan,
2039                                           const char *model, const char *name,
2040                                           int fd, int is_connected)
2041 {
2042     int so_type=-1, optlen=sizeof(so_type);
2043
2044     if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type,
2045         (socklen_t *)&optlen)< 0) {
2046         fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n", fd);
2047         return NULL;
2048     }
2049     switch(so_type) {
2050     case SOCK_DGRAM:
2051         return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected);
2052     case SOCK_STREAM:
2053         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
2054     default:
2055         /* who knows ... this could be a eg. a pty, do warn and continue as stream */
2056         fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
2057         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
2058     }
2059     return NULL;
2060 }
2061
2062 static void net_socket_accept(void *opaque)
2063 {
2064     NetSocketListenState *s = opaque;
2065     NetSocketState *s1;
2066     struct sockaddr_in saddr;
2067     socklen_t len;
2068     int fd;
2069
2070     for(;;) {
2071         len = sizeof(saddr);
2072         fd = accept(s->fd, (struct sockaddr *)&saddr, &len);
2073         if (fd < 0 && errno != EINTR) {
2074             return;
2075         } else if (fd >= 0) {
2076             break;
2077         }
2078     }
2079     s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1);
2080     if (!s1) {
2081         closesocket(fd);
2082     } else {
2083         snprintf(s1->vc->info_str, sizeof(s1->vc->info_str),
2084                  "socket: connection from %s:%d",
2085                  inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2086     }
2087 }
2088
2089 static int net_socket_listen_init(VLANState *vlan,
2090                                   const char *model,
2091                                   const char *name,
2092                                   const char *host_str)
2093 {
2094     NetSocketListenState *s;
2095     int fd, val, ret;
2096     struct sockaddr_in saddr;
2097
2098     if (parse_host_port(&saddr, host_str) < 0)
2099         return -1;
2100
2101     s = qemu_mallocz(sizeof(NetSocketListenState));
2102
2103     fd = socket(PF_INET, SOCK_STREAM, 0);
2104     if (fd < 0) {
2105         perror("socket");
2106         return -1;
2107     }
2108     socket_set_nonblock(fd);
2109
2110     /* allow fast reuse */
2111     val = 1;
2112     setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));
2113
2114     ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
2115     if (ret < 0) {
2116         perror("bind");
2117         return -1;
2118     }
2119     ret = listen(fd, 0);
2120     if (ret < 0) {
2121         perror("listen");
2122         return -1;
2123     }
2124     s->vlan = vlan;
2125     s->model = strdup(model);
2126     s->name = name ? strdup(name) : NULL;
2127     s->fd = fd;
2128     qemu_set_fd_handler(fd, net_socket_accept, NULL, s);
2129     return 0;
2130 }
2131
2132 static int net_socket_connect_init(VLANState *vlan,
2133                                    const char *model,
2134                                    const char *name,
2135                                    const char *host_str)
2136 {
2137     NetSocketState *s;
2138     int fd, connected, ret, err;
2139     struct sockaddr_in saddr;
2140
2141     if (parse_host_port(&saddr, host_str) < 0)
2142         return -1;
2143
2144     fd = socket(PF_INET, SOCK_STREAM, 0);
2145     if (fd < 0) {
2146         perror("socket");
2147         return -1;
2148     }
2149     socket_set_nonblock(fd);
2150
2151     connected = 0;
2152     for(;;) {
2153         ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
2154         if (ret < 0) {
2155             err = socket_error();
2156             if (err == EINTR || err == EWOULDBLOCK) {
2157             } else if (err == EINPROGRESS) {
2158                 break;
2159 #ifdef _WIN32
2160             } else if (err == WSAEALREADY) {
2161                 break;
2162 #endif
2163             } else {
2164                 perror("connect");
2165                 closesocket(fd);
2166                 return -1;
2167             }
2168         } else {
2169             connected = 1;
2170             break;
2171         }
2172     }
2173     s = net_socket_fd_init(vlan, model, name, fd, connected);
2174     if (!s)
2175         return -1;
2176     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2177              "socket: connect to %s:%d",
2178              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2179     return 0;
2180 }
2181
2182 static int net_socket_mcast_init(VLANState *vlan,
2183                                  const char *model,
2184                                  const char *name,
2185                                  const char *host_str)
2186 {
2187     NetSocketState *s;
2188     int fd;
2189     struct sockaddr_in saddr;
2190
2191     if (parse_host_port(&saddr, host_str) < 0)
2192         return -1;
2193
2194
2195     fd = net_socket_mcast_create(&saddr);
2196     if (fd < 0)
2197         return -1;
2198
2199     s = net_socket_fd_init(vlan, model, name, fd, 0);
2200     if (!s)
2201         return -1;
2202
2203     s->dgram_dst = saddr;
2204
2205     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2206              "socket: mcast=%s:%d",
2207              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2208     return 0;
2209
2210 }
2211
2212 typedef struct DumpState {
2213     VLANClientState *pcap_vc;
2214     int fd;
2215     int pcap_caplen;
2216 } DumpState;
2217
2218 #define PCAP_MAGIC 0xa1b2c3d4
2219
2220 struct pcap_file_hdr {
2221     uint32_t magic;
2222     uint16_t version_major;
2223     uint16_t version_minor;
2224     int32_t thiszone;
2225     uint32_t sigfigs;
2226     uint32_t snaplen;
2227     uint32_t linktype;
2228 };
2229
2230 struct pcap_sf_pkthdr {
2231     struct {
2232         int32_t tv_sec;
2233         int32_t tv_usec;
2234     } ts;
2235     uint32_t caplen;
2236     uint32_t len;
2237 };
2238
2239 static ssize_t dump_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
2240 {
2241     DumpState *s = vc->opaque;
2242     struct pcap_sf_pkthdr hdr;
2243     int64_t ts;
2244     int caplen;
2245
2246     /* Early return in case of previous error. */
2247     if (s->fd < 0) {
2248         return size;
2249     }
2250
2251     ts = muldiv64(qemu_get_clock(vm_clock), 1000000, ticks_per_sec);
2252     caplen = size > s->pcap_caplen ? s->pcap_caplen : size;
2253
2254     hdr.ts.tv_sec = ts / 1000000;
2255     hdr.ts.tv_usec = ts % 1000000;
2256     hdr.caplen = caplen;
2257     hdr.len = size;
2258     if (write(s->fd, &hdr, sizeof(hdr)) != sizeof(hdr) ||
2259         write(s->fd, buf, caplen) != caplen) {
2260         qemu_log("-net dump write error - stop dump\n");
2261         close(s->fd);
2262         s->fd = -1;
2263     }
2264
2265     return size;
2266 }
2267
2268 static void net_dump_cleanup(VLANClientState *vc)
2269 {
2270     DumpState *s = vc->opaque;
2271
2272     close(s->fd);
2273     qemu_free(s);
2274 }
2275
2276 static int net_dump_init(Monitor *mon, VLANState *vlan, const char *device,
2277                          const char *name, const char *filename, int len)
2278 {
2279     struct pcap_file_hdr hdr;
2280     DumpState *s;
2281
2282     s = qemu_malloc(sizeof(DumpState));
2283
2284     s->fd = open(filename, O_CREAT | O_WRONLY | O_BINARY, 0644);
2285     if (s->fd < 0) {
2286         config_error(mon, "-net dump: can't open %s\n", filename);
2287         return -1;
2288     }
2289
2290     s->pcap_caplen = len;
2291
2292     hdr.magic = PCAP_MAGIC;
2293     hdr.version_major = 2;
2294     hdr.version_minor = 4;
2295     hdr.thiszone = 0;
2296     hdr.sigfigs = 0;
2297     hdr.snaplen = s->pcap_caplen;
2298     hdr.linktype = 1;
2299
2300     if (write(s->fd, &hdr, sizeof(hdr)) < sizeof(hdr)) {
2301         config_error(mon, "-net dump write error: %s\n", strerror(errno));
2302         close(s->fd);
2303         qemu_free(s);
2304         return -1;
2305     }
2306
2307     s->pcap_vc = qemu_new_vlan_client(vlan, device, name, NULL, dump_receive, NULL,
2308                                       net_dump_cleanup, s);
2309     snprintf(s->pcap_vc->info_str, sizeof(s->pcap_vc->info_str),
2310              "dump to %s (len=%d)", filename, len);
2311     return 0;
2312 }
2313
2314 /* find or alloc a new VLAN */
2315 VLANState *qemu_find_vlan(int id, int allocate)
2316 {
2317     VLANState **pvlan, *vlan;
2318     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2319         if (vlan->id == id)
2320             return vlan;
2321     }
2322     if (!allocate) {
2323         return NULL;
2324     }
2325     vlan = qemu_mallocz(sizeof(VLANState));
2326     vlan->id = id;
2327     TAILQ_INIT(&vlan->send_queue);
2328     vlan->next = NULL;
2329     pvlan = &first_vlan;
2330     while (*pvlan != NULL)
2331         pvlan = &(*pvlan)->next;
2332     *pvlan = vlan;
2333     return vlan;
2334 }
2335
2336 static int nic_get_free_idx(void)
2337 {
2338     int index;
2339
2340     for (index = 0; index < MAX_NICS; index++)
2341         if (!nd_table[index].used)
2342             return index;
2343     return -1;
2344 }
2345
2346 void qemu_check_nic_model(NICInfo *nd, const char *model)
2347 {
2348     const char *models[2];
2349
2350     models[0] = model;
2351     models[1] = NULL;
2352
2353     qemu_check_nic_model_list(nd, models, model);
2354 }
2355
2356 void qemu_check_nic_model_list(NICInfo *nd, const char * const *models,
2357                                const char *default_model)
2358 {
2359     int i, exit_status = 0;
2360
2361     if (!nd->model)
2362         nd->model = strdup(default_model);
2363
2364     if (strcmp(nd->model, "?") != 0) {
2365         for (i = 0 ; models[i]; i++)
2366             if (strcmp(nd->model, models[i]) == 0)
2367                 return;
2368
2369         fprintf(stderr, "qemu: Unsupported NIC model: %s\n", nd->model);
2370         exit_status = 1;
2371     }
2372
2373     fprintf(stderr, "qemu: Supported NIC models: ");
2374     for (i = 0 ; models[i]; i++)
2375         fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
2376
2377     exit(exit_status);
2378 }
2379
2380 static int net_handle_fd_param(Monitor *mon, const char *param)
2381 {
2382     if (!qemu_isdigit(param[0])) {
2383         int fd;
2384
2385         fd = monitor_get_fd(mon, param);
2386         if (fd == -1) {
2387             config_error(mon, "No file descriptor named %s found", param);
2388             return -1;
2389         }
2390
2391         return fd;
2392     } else {
2393         return strtol(param, NULL, 0);
2394     }
2395 }
2396
2397 int net_client_init(Monitor *mon, const char *device, const char *p)
2398 {
2399     char buf[1024];
2400     int vlan_id, ret;
2401     VLANState *vlan;
2402     char *name = NULL;
2403
2404     vlan_id = 0;
2405     if (get_param_value(buf, sizeof(buf), "vlan", p)) {
2406         vlan_id = strtol(buf, NULL, 0);
2407     }
2408     vlan = qemu_find_vlan(vlan_id, 1);
2409
2410     if (get_param_value(buf, sizeof(buf), "name", p)) {
2411         name = qemu_strdup(buf);
2412     }
2413     if (!strcmp(device, "nic")) {
2414         static const char * const nic_params[] = {
2415             "vlan", "name", "macaddr", "model", "addr", "id", "vectors", NULL
2416         };
2417         NICInfo *nd;
2418         uint8_t *macaddr;
2419         int idx = nic_get_free_idx();
2420
2421         if (check_params(buf, sizeof(buf), nic_params, p) < 0) {
2422             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2423             ret = -1;
2424             goto out;
2425         }
2426         if (idx == -1 || nb_nics >= MAX_NICS) {
2427             config_error(mon, "Too Many NICs\n");
2428             ret = -1;
2429             goto out;
2430         }
2431         nd = &nd_table[idx];
2432         macaddr = nd->macaddr;
2433         macaddr[0] = 0x52;
2434         macaddr[1] = 0x54;
2435         macaddr[2] = 0x00;
2436         macaddr[3] = 0x12;
2437         macaddr[4] = 0x34;
2438         macaddr[5] = 0x56 + idx;
2439
2440         if (get_param_value(buf, sizeof(buf), "macaddr", p)) {
2441             if (parse_macaddr(macaddr, buf) < 0) {
2442                 config_error(mon, "invalid syntax for ethernet address\n");
2443                 ret = -1;
2444                 goto out;
2445             }
2446         }
2447         if (get_param_value(buf, sizeof(buf), "model", p)) {
2448             nd->model = strdup(buf);
2449         }
2450         if (get_param_value(buf, sizeof(buf), "addr", p)) {
2451             nd->devaddr = strdup(buf);
2452         }
2453         if (get_param_value(buf, sizeof(buf), "id", p)) {
2454             nd->id = strdup(buf);
2455         }
2456         nd->nvectors = NIC_NVECTORS_UNSPECIFIED;
2457         if (get_param_value(buf, sizeof(buf), "vectors", p)) {
2458             char *endptr;
2459             long vectors = strtol(buf, &endptr, 0);
2460             if (*endptr) {
2461                 config_error(mon, "invalid syntax for # of vectors\n");
2462                 ret = -1;
2463                 goto out;
2464             }
2465             if (vectors < 0 || vectors > 0x7ffffff) {
2466                 config_error(mon, "invalid # of vectors\n");
2467                 ret = -1;
2468                 goto out;
2469             }
2470             nd->nvectors = vectors;
2471         }
2472         nd->vlan = vlan;
2473         nd->name = name;
2474         nd->used = 1;
2475         name = NULL;
2476         nb_nics++;
2477         vlan->nb_guest_devs++;
2478         ret = idx;
2479     } else
2480     if (!strcmp(device, "none")) {
2481         if (*p != '\0') {
2482             config_error(mon, "'none' takes no parameters\n");
2483             ret = -1;
2484             goto out;
2485         }
2486         /* does nothing. It is needed to signal that no network cards
2487            are wanted */
2488         ret = 0;
2489     } else
2490 #ifdef CONFIG_SLIRP
2491     if (!strcmp(device, "user")) {
2492         static const char * const slirp_params[] = {
2493             "vlan", "name", "hostname", "restrict", "ip", "net", "host",
2494             "tftp", "bootfile", "dhcpstart", "dns", "smb", "smbserver",
2495             "hostfwd", "guestfwd", NULL
2496         };
2497         struct slirp_config_str *config;
2498         int restricted = 0;
2499         char *vnet = NULL;
2500         char *vhost = NULL;
2501         char *vhostname = NULL;
2502         char *tftp_export = NULL;
2503         char *bootfile = NULL;
2504         char *vdhcp_start = NULL;
2505         char *vnamesrv = NULL;
2506         char *smb_export = NULL;
2507         char *vsmbsrv = NULL;
2508         const char *q;
2509
2510         if (check_params(buf, sizeof(buf), slirp_params, p) < 0) {
2511             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2512             ret = -1;
2513             goto out;
2514         }
2515         if (get_param_value(buf, sizeof(buf), "ip", p)) {
2516             int vnet_buflen = strlen(buf) + strlen("/24") + 1;
2517             /* emulate legacy parameter */
2518             vnet = qemu_malloc(vnet_buflen);
2519             pstrcpy(vnet, vnet_buflen, buf);
2520             pstrcat(vnet, vnet_buflen, "/24");
2521         }
2522         if (get_param_value(buf, sizeof(buf), "net", p)) {
2523             vnet = qemu_strdup(buf);
2524         }
2525         if (get_param_value(buf, sizeof(buf), "host", p)) {
2526             vhost = qemu_strdup(buf);
2527         }
2528         if (get_param_value(buf, sizeof(buf), "hostname", p)) {
2529             vhostname = qemu_strdup(buf);
2530         }
2531         if (get_param_value(buf, sizeof(buf), "restrict", p)) {
2532             restricted = (buf[0] == 'y') ? 1 : 0;
2533         }
2534         if (get_param_value(buf, sizeof(buf), "dhcpstart", p)) {
2535             vdhcp_start = qemu_strdup(buf);
2536         }
2537         if (get_param_value(buf, sizeof(buf), "dns", p)) {
2538             vnamesrv = qemu_strdup(buf);
2539         }
2540         if (get_param_value(buf, sizeof(buf), "tftp", p)) {
2541             tftp_export = qemu_strdup(buf);
2542         }
2543         if (get_param_value(buf, sizeof(buf), "bootfile", p)) {
2544             bootfile = qemu_strdup(buf);
2545         }
2546         if (get_param_value(buf, sizeof(buf), "smb", p)) {
2547             smb_export = qemu_strdup(buf);
2548             if (get_param_value(buf, sizeof(buf), "smbserver", p)) {
2549                 vsmbsrv = qemu_strdup(buf);
2550             }
2551         }
2552         q = p;
2553         while (1) {
2554             config = qemu_malloc(sizeof(*config));
2555             if (!get_next_param_value(config->str, sizeof(config->str),
2556                                       "hostfwd", &q)) {
2557                 break;
2558             }
2559             config->flags = SLIRP_CFG_HOSTFWD;
2560             config->next = slirp_configs;
2561             slirp_configs = config;
2562             config = NULL;
2563         }
2564         q = p;
2565         while (1) {
2566             config = qemu_malloc(sizeof(*config));
2567             if (!get_next_param_value(config->str, sizeof(config->str),
2568                                       "guestfwd", &q)) {
2569                 break;
2570             }
2571             config->flags = 0;
2572             config->next = slirp_configs;
2573             slirp_configs = config;
2574             config = NULL;
2575         }
2576         qemu_free(config);
2577         vlan->nb_host_devs++;
2578         ret = net_slirp_init(mon, vlan, device, name, restricted, vnet, vhost,
2579                              vhostname, tftp_export, bootfile, vdhcp_start,
2580                              vnamesrv, smb_export, vsmbsrv);
2581         qemu_free(vnet);
2582         qemu_free(vhost);
2583         qemu_free(vhostname);
2584         qemu_free(tftp_export);
2585         qemu_free(bootfile);
2586         qemu_free(vdhcp_start);
2587         qemu_free(vnamesrv);
2588         qemu_free(smb_export);
2589         qemu_free(vsmbsrv);
2590     } else if (!strcmp(device, "channel")) {
2591         if (TAILQ_EMPTY(&slirp_stacks)) {
2592             struct slirp_config_str *config;
2593
2594             config = qemu_malloc(sizeof(*config));
2595             pstrcpy(config->str, sizeof(config->str), p);
2596             config->flags = SLIRP_CFG_LEGACY;
2597             config->next = slirp_configs;
2598             slirp_configs = config;
2599         } else {
2600             slirp_guestfwd(TAILQ_FIRST(&slirp_stacks), mon, p, 1);
2601         }
2602         ret = 0;
2603     } else
2604 #endif
2605 #ifdef _WIN32
2606     if (!strcmp(device, "tap")) {
2607         static const char * const tap_params[] = {
2608             "vlan", "name", "ifname", NULL
2609         };
2610         char ifname[64];
2611
2612         if (check_params(buf, sizeof(buf), tap_params, p) < 0) {
2613             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2614             ret = -1;
2615             goto out;
2616         }
2617         if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
2618             config_error(mon, "tap: no interface name\n");
2619             ret = -1;
2620             goto out;
2621         }
2622         vlan->nb_host_devs++;
2623         ret = tap_win32_init(vlan, device, name, ifname);
2624     } else
2625 #elif defined (_AIX)
2626 #else
2627     if (!strcmp(device, "tap")) {
2628         char ifname[64], chkbuf[64];
2629         char setup_script[1024], down_script[1024];
2630         TAPState *s;
2631         int fd;
2632         vlan->nb_host_devs++;
2633         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
2634             static const char * const fd_params[] = {
2635                 "vlan", "name", "fd", "sndbuf", NULL
2636             };
2637             ret = -1;
2638             if (check_params(chkbuf, sizeof(chkbuf), fd_params, p) < 0) {
2639                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2640                 goto out;
2641             }
2642             fd = net_handle_fd_param(mon, buf);
2643             if (fd == -1) {
2644                 goto out;
2645             }
2646             fcntl(fd, F_SETFL, O_NONBLOCK);
2647             s = net_tap_fd_init(vlan, device, name, fd);
2648             if (!s) {
2649                 close(fd);
2650             }
2651         } else {
2652             static const char * const tap_params[] = {
2653                 "vlan", "name", "ifname", "script", "downscript", "sndbuf", NULL
2654             };
2655             if (check_params(chkbuf, sizeof(chkbuf), tap_params, p) < 0) {
2656                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2657                 ret = -1;
2658                 goto out;
2659             }
2660             if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
2661                 ifname[0] = '\0';
2662             }
2663             if (get_param_value(setup_script, sizeof(setup_script), "script", p) == 0) {
2664                 pstrcpy(setup_script, sizeof(setup_script), DEFAULT_NETWORK_SCRIPT);
2665             }
2666             if (get_param_value(down_script, sizeof(down_script), "downscript", p) == 0) {
2667                 pstrcpy(down_script, sizeof(down_script), DEFAULT_NETWORK_DOWN_SCRIPT);
2668             }
2669             s = net_tap_init(vlan, device, name, ifname, setup_script, down_script);
2670         }
2671         if (s != NULL) {
2672             const char *sndbuf_str = NULL;
2673             if (get_param_value(buf, sizeof(buf), "sndbuf", p)) {
2674                 sndbuf_str = buf;
2675             }
2676             tap_set_sndbuf(s, sndbuf_str, mon);
2677             ret = 0;
2678         } else {
2679             ret = -1;
2680         }
2681     } else
2682 #endif
2683     if (!strcmp(device, "socket")) {
2684         char chkbuf[64];
2685         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
2686             static const char * const fd_params[] = {
2687                 "vlan", "name", "fd", NULL
2688             };
2689             int fd;
2690             ret = -1;
2691             if (check_params(chkbuf, sizeof(chkbuf), fd_params, p) < 0) {
2692                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2693                 goto out;
2694             }
2695             fd = net_handle_fd_param(mon, buf);
2696             if (fd == -1) {
2697                 goto out;
2698             }
2699             if (!net_socket_fd_init(vlan, device, name, fd, 1)) {
2700                 close(fd);
2701                 goto out;
2702             }
2703             ret = 0;
2704         } else if (get_param_value(buf, sizeof(buf), "listen", p) > 0) {
2705             static const char * const listen_params[] = {
2706                 "vlan", "name", "listen", NULL
2707             };
2708             if (check_params(chkbuf, sizeof(chkbuf), listen_params, p) < 0) {
2709                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2710                 ret = -1;
2711                 goto out;
2712             }
2713             ret = net_socket_listen_init(vlan, device, name, buf);
2714         } else if (get_param_value(buf, sizeof(buf), "connect", p) > 0) {
2715             static const char * const connect_params[] = {
2716                 "vlan", "name", "connect", NULL
2717             };
2718             if (check_params(chkbuf, sizeof(chkbuf), connect_params, p) < 0) {
2719                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2720                 ret = -1;
2721                 goto out;
2722             }
2723             ret = net_socket_connect_init(vlan, device, name, buf);
2724         } else if (get_param_value(buf, sizeof(buf), "mcast", p) > 0) {
2725             static const char * const mcast_params[] = {
2726                 "vlan", "name", "mcast", NULL
2727             };
2728             if (check_params(chkbuf, sizeof(chkbuf), mcast_params, p) < 0) {
2729                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2730                 ret = -1;
2731                 goto out;
2732             }
2733             ret = net_socket_mcast_init(vlan, device, name, buf);
2734         } else {
2735             config_error(mon, "Unknown socket options: %s\n", p);
2736             ret = -1;
2737             goto out;
2738         }
2739         vlan->nb_host_devs++;
2740     } else
2741 #ifdef CONFIG_VDE
2742     if (!strcmp(device, "vde")) {
2743         static const char * const vde_params[] = {
2744             "vlan", "name", "sock", "port", "group", "mode", NULL
2745         };
2746         char vde_sock[1024], vde_group[512];
2747         int vde_port, vde_mode;
2748
2749         if (check_params(buf, sizeof(buf), vde_params, p) < 0) {
2750             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2751             ret = -1;
2752             goto out;
2753         }
2754         vlan->nb_host_devs++;
2755         if (get_param_value(vde_sock, sizeof(vde_sock), "sock", p) <= 0) {
2756             vde_sock[0] = '\0';
2757         }
2758         if (get_param_value(buf, sizeof(buf), "port", p) > 0) {
2759             vde_port = strtol(buf, NULL, 10);
2760         } else {
2761             vde_port = 0;
2762         }
2763         if (get_param_value(vde_group, sizeof(vde_group), "group", p) <= 0) {
2764             vde_group[0] = '\0';
2765         }
2766         if (get_param_value(buf, sizeof(buf), "mode", p) > 0) {
2767             vde_mode = strtol(buf, NULL, 8);
2768         } else {
2769             vde_mode = 0700;
2770         }
2771         ret = net_vde_init(vlan, device, name, vde_sock, vde_port, vde_group, vde_mode);
2772     } else
2773 #endif
2774     if (!strcmp(device, "dump")) {
2775         int len = 65536;
2776
2777         if (get_param_value(buf, sizeof(buf), "len", p) > 0) {
2778             len = strtol(buf, NULL, 0);
2779         }
2780         if (!get_param_value(buf, sizeof(buf), "file", p)) {
2781             snprintf(buf, sizeof(buf), "qemu-vlan%d.pcap", vlan_id);
2782         }
2783         ret = net_dump_init(mon, vlan, device, name, buf, len);
2784     } else {
2785         config_error(mon, "Unknown network device: %s\n", device);
2786         ret = -1;
2787         goto out;
2788     }
2789     if (ret < 0) {
2790         config_error(mon, "Could not initialize device '%s'\n", device);
2791     }
2792 out:
2793     qemu_free(name);
2794     return ret;
2795 }
2796
2797 void net_client_uninit(NICInfo *nd)
2798 {
2799     nd->vlan->nb_guest_devs--;
2800     nb_nics--;
2801     nd->used = 0;
2802     free((void *)nd->model);
2803 }
2804
2805 static int net_host_check_device(const char *device)
2806 {
2807     int i;
2808     const char *valid_param_list[] = { "tap", "socket", "dump"
2809 #ifdef CONFIG_SLIRP
2810                                        ,"user"
2811 #endif
2812 #ifdef CONFIG_VDE
2813                                        ,"vde"
2814 #endif
2815     };
2816     for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) {
2817         if (!strncmp(valid_param_list[i], device,
2818                      strlen(valid_param_list[i])))
2819             return 1;
2820     }
2821
2822     return 0;
2823 }
2824
2825 void net_host_device_add(Monitor *mon, const QDict *qdict)
2826 {
2827     const char *device = qdict_get_str(qdict, "device");
2828     const char *opts = qdict_get_try_str(qdict, "opts");
2829
2830     if (!net_host_check_device(device)) {
2831         monitor_printf(mon, "invalid host network device %s\n", device);
2832         return;
2833     }
2834     if (net_client_init(mon, device, opts ? opts : "") < 0) {
2835         monitor_printf(mon, "adding host network device %s failed\n", device);
2836     }
2837 }
2838
2839 void net_host_device_remove(Monitor *mon, const QDict *qdict)
2840 {
2841     VLANClientState *vc;
2842     int vlan_id = qdict_get_int(qdict, "vlan_id");
2843     const char *device = qdict_get_str(qdict, "device");
2844
2845     vc = qemu_find_vlan_client_by_name(mon, vlan_id, device);
2846     if (!vc) {
2847         return;
2848     }
2849     if (!net_host_check_device(vc->model)) {
2850         monitor_printf(mon, "invalid host network device %s\n", device);
2851         return;
2852     }
2853     qemu_del_vlan_client(vc);
2854 }
2855
2856 int net_client_parse(const char *str)
2857 {
2858     const char *p;
2859     char *q;
2860     char device[64];
2861
2862     p = str;
2863     q = device;
2864     while (*p != '\0' && *p != ',') {
2865         if ((q - device) < sizeof(device) - 1)
2866             *q++ = *p;
2867         p++;
2868     }
2869     *q = '\0';
2870     if (*p == ',')
2871         p++;
2872
2873     return net_client_init(NULL, device, p);
2874 }
2875
2876 void net_set_boot_mask(int net_boot_mask)
2877 {
2878     int i;
2879
2880     /* Only the first four NICs may be bootable */
2881     net_boot_mask = net_boot_mask & 0xF;
2882
2883     for (i = 0; i < nb_nics; i++) {
2884         if (net_boot_mask & (1 << i)) {
2885             nd_table[i].bootable = 1;
2886             net_boot_mask &= ~(1 << i);
2887         }
2888     }
2889
2890     if (net_boot_mask) {
2891         fprintf(stderr, "Cannot boot from non-existent NIC\n");
2892         exit(1);
2893     }
2894 }
2895
2896 void do_info_network(Monitor *mon)
2897 {
2898     VLANState *vlan;
2899     VLANClientState *vc;
2900
2901     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2902         monitor_printf(mon, "VLAN %d devices:\n", vlan->id);
2903         for(vc = vlan->first_client; vc != NULL; vc = vc->next)
2904             monitor_printf(mon, "  %s: %s\n", vc->name, vc->info_str);
2905     }
2906 }
2907
2908 void do_set_link(Monitor *mon, const QDict *qdict)
2909 {
2910     VLANState *vlan;
2911     VLANClientState *vc = NULL;
2912     const char *name = qdict_get_str(qdict, "name");
2913     const char *up_or_down = qdict_get_str(qdict, "up_or_down");
2914
2915     for (vlan = first_vlan; vlan != NULL; vlan = vlan->next)
2916         for (vc = vlan->first_client; vc != NULL; vc = vc->next)
2917             if (strcmp(vc->name, name) == 0)
2918                 goto done;
2919 done:
2920
2921     if (!vc) {
2922         monitor_printf(mon, "could not find network device '%s'\n", name);
2923         return;
2924     }
2925
2926     if (strcmp(up_or_down, "up") == 0)
2927         vc->link_down = 0;
2928     else if (strcmp(up_or_down, "down") == 0)
2929         vc->link_down = 1;
2930     else
2931         monitor_printf(mon, "invalid link status '%s'; only 'up' or 'down' "
2932                        "valid\n", up_or_down);
2933
2934     if (vc->link_status_changed)
2935         vc->link_status_changed(vc);
2936 }
2937
2938 void net_cleanup(void)
2939 {
2940     VLANState *vlan;
2941
2942     /* close network clients */
2943     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2944         VLANClientState *vc = vlan->first_client;
2945
2946         while (vc) {
2947             VLANClientState *next = vc->next;
2948
2949             qemu_del_vlan_client(vc);
2950
2951             vc = next;
2952         }
2953     }
2954 }
2955
2956 void net_client_check(void)
2957 {
2958     VLANState *vlan;
2959
2960     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2961         if (vlan->nb_guest_devs == 0 && vlan->nb_host_devs == 0)
2962             continue;
2963         if (vlan->nb_guest_devs == 0)
2964             fprintf(stderr, "Warning: vlan %d with no nics\n", vlan->id);
2965         if (vlan->nb_host_devs == 0)
2966             fprintf(stderr,
2967                     "Warning: vlan %d is not connected to host network\n",
2968                     vlan->id);
2969     }
2970 }