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