net.c

   1 /*
   2  * QEMU System Emulator
   3  *
   4  * Copyright (c) 2003-2008 Fabrice Bellard
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24 #include <unistd.h>
  25 #include <fcntl.h>
  26 #include <signal.h>
  27 #include <time.h>
  28 #include <errno.h>
  29 #include <sys/time.h>
  30 #include <zlib.h>
  31
  32 /* Needed early for HOST_BSD etc. */
  33 #include "config-host.h"
  34
  35 #ifndef _WIN32
  36 #include <sys/times.h>
  37 #include <sys/wait.h>
  38 #include <termios.h>
  39 #include <sys/mman.h>
  40 #include <sys/ioctl.h>
  41 #include <sys/resource.h>
  42 #include <sys/socket.h>
  43 #include <netinet/in.h>
  44 #include <net/if.h>
  45 #ifdef __NetBSD__
  46 #include <net/if_tap.h>
  47 #endif
  48 #ifdef __linux__
  49 #include <linux/if_tun.h>
  50 #endif
  51 #include <arpa/inet.h>
  52 #include <dirent.h>
  53 #include <netdb.h>
  54 #include <sys/select.h>
  55 #ifdef HOST_BSD
  56 #include <sys/stat.h>
  57 #if defined(__FreeBSD__) || defined(__DragonFly__)
  58 #include <libutil.h>
  59 #else
  60 #include <util.h>
  61 #endif
  62 #elif defined (__GLIBC__) && defined (__FreeBSD_kernel__)
  63 #include <freebsd/stdlib.h>
  64 #else
  65 #ifdef __linux__
  66 #include <pty.h>
  67 #include <malloc.h>
  68 #include <linux/rtc.h>
  69
  70 /* For the benefit of older linux systems which don't supply it,
  71    we use a local copy of hpet.h. */
  72 /* #include <linux/hpet.h> */
  73 #include "hpet.h"
  74
  75 #include <linux/ppdev.h>
  76 #include <linux/parport.h>
  77 #endif
  78 #ifdef __sun__
  79 #include <sys/stat.h>
  80 #include <sys/ethernet.h>
  81 #include <sys/sockio.h>
  82 #include <netinet/arp.h>
  83 #include <netinet/in.h>
  84 #include <netinet/in_systm.h>
  85 #include <netinet/ip.h>
  86 #include <netinet/ip_icmp.h> // must come after ip.h
  87 #include <netinet/udp.h>
  88 #include <netinet/tcp.h>
  89 #include <net/if.h>
  90 #include <syslog.h>
  91 #include <stropts.h>
  92 #endif
  93 #endif
  94 #endif
  95
  96 #if defined(__OpenBSD__)
  97 #include <util.h>
  98 #endif
  99
 100 #if defined(CONFIG_VDE)
 101 #include <libvdeplug.h>
 102 #endif
 103
 104 #ifdef _WIN32
 105 #include <windows.h>
 106 #include <malloc.h>
 107 #include <sys/timeb.h>
 108 #include <mmsystem.h>
 109 #define getopt_long_only getopt_long
 110 #define memalign(align, size) malloc(size)
 111 #endif
 112
 113 #include "qemu-common.h"
 114 #include "net.h"
 115 #include "monitor.h"
 116 #include "sysemu.h"
 117 #include "qemu-timer.h"
 118 #include "qemu-char.h"
 119 #include "audio/audio.h"
 120 #include "qemu_socket.h"
 121 #include "qemu-log.h"
 122
 123 #if defined(CONFIG_SLIRP)
 124 #include "libslirp.h"
 125 #endif
 126
 127
 128 static VLANState *first_vlan;
 129
 130 /***********************************************************/
 131 /* network device redirectors */
 132
 133 #if defined(DEBUG_NET) || defined(DEBUG_SLIRP)
 134 static void hex_dump(FILE *f, const uint8_t *buf, int size)
 135 {
 136     int len, i, j, c;
 137
 138     for(i=0;i<size;i+=16) {
 139         len = size - i;
 140         if (len > 16)
 141             len = 16;
 142         fprintf(f, "%08x ", i);
 143         for(j=0;j<16;j++) {
 144             if (j < len)
 145                 fprintf(f, " %02x", buf[i+j]);
 146             else
 147                 fprintf(f, "   ");
 148         }
 149         fprintf(f, " ");
 150         for(j=0;j<len;j++) {
 151             c = buf[i+j];
 152             if (c < ' ' || c > '~')
 153                 c = '.';
 154             fprintf(f, "%c", c);
 155         }
 156         fprintf(f, "\n");
 157     }
 158 }
 159 #endif
 160
 161 static int parse_macaddr(uint8_t *macaddr, const char *p)
 162 {
 163     int i;
 164     char *last_char;
 165     long int offset;
 166
 167     errno = 0;
 168     offset = strtol(p, &last_char, 0);
 169     if (0 == errno && '\0' == *last_char &&
 170             offset >= 0 && offset <= 0xFFFFFF) {
 171         macaddr[3] = (offset & 0xFF0000) >> 16;
 172         macaddr[4] = (offset & 0xFF00) >> 8;
 173         macaddr[5] = offset & 0xFF;
 174         return 0;
 175     } else {
 176         for(i = 0; i < 6; i++) {
 177             macaddr[i] = strtol(p, (char **)&p, 16);
 178             if (i == 5) {
 179                 if (*p != '\0')
 180                     return -1;
 181             } else {
 182                 if (*p != ':' && *p != '-')
 183                     return -1;
 184                 p++;
 185             }
 186         }
 187         return 0;
 188     }
 189
 190     return -1;
 191 }
 192
 193 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
 194 {
 195     const char *p, *p1;
 196     int len;
 197     p = *pp;
 198     p1 = strchr(p, sep);
 199     if (!p1)
 200         return -1;
 201     len = p1 - p;
 202     p1++;
 203     if (buf_size > 0) {
 204         if (len > buf_size - 1)
 205             len = buf_size - 1;
 206         memcpy(buf, p, len);
 207         buf[len] = '\0';
 208     }
 209     *pp = p1;
 210     return 0;
 211 }
 212
 213 int parse_host_src_port(struct sockaddr_in *haddr,
 214                         struct sockaddr_in *saddr,
 215                         const char *input_str)
 216 {
 217     char *str = strdup(input_str);
 218     char *host_str = str;
 219     char *src_str;
 220     const char *src_str2;
 221     char *ptr;
 222
 223     /*
 224      * Chop off any extra arguments at the end of the string which
 225      * would start with a comma, then fill in the src port information
 226      * if it was provided else use the "any address" and "any port".
 227      */
 228     if ((ptr = strchr(str,',')))
 229         *ptr = '\0';
 230
 231     if ((src_str = strchr(input_str,'@'))) {
 232         *src_str = '\0';
 233         src_str++;
 234     }
 235
 236     if (parse_host_port(haddr, host_str) < 0)
 237         goto fail;
 238
 239     src_str2 = src_str;
 240     if (!src_str || *src_str == '\0')
 241         src_str2 = ":0";
 242
 243     if (parse_host_port(saddr, src_str2) < 0)
 244         goto fail;
 245
 246     free(str);
 247     return(0);
 248
 249 fail:
 250     free(str);
 251     return -1;
 252 }
 253
 254 int parse_host_port(struct sockaddr_in *saddr, const char *str)
 255 {
 256     char buf[512];
 257     struct hostent *he;
 258     const char *p, *r;
 259     int port;
 260
 261     p = str;
 262     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 263         return -1;
 264     saddr->sin_family = AF_INET;
 265     if (buf[0] == '\0') {
 266         saddr->sin_addr.s_addr = 0;
 267     } else {
 268         if (qemu_isdigit(buf[0])) {
 269             if (!inet_aton(buf, &saddr->sin_addr))
 270                 return -1;
 271         } else {
 272             if ((he = gethostbyname(buf)) == NULL)
 273                 return - 1;
 274             saddr->sin_addr = *(struct in_addr *)he->h_addr;
 275         }
 276     }
 277     port = strtol(p, (char **)&r, 0);
 278     if (r == p)
 279         return -1;
 280     saddr->sin_port = htons(port);
 281     return 0;
 282 }
 283
 284 #if !defined(_WIN32) && 0
 285 static int parse_unix_path(struct sockaddr_un *uaddr, const char *str)
 286 {
 287     const char *p;
 288     int len;
 289
 290     len = MIN(108, strlen(str));
 291     p = strchr(str, ',');
 292     if (p)
 293         len = MIN(len, p - str);
 294
 295     memset(uaddr, 0, sizeof(*uaddr));
 296
 297     uaddr->sun_family = AF_UNIX;
 298     memcpy(uaddr->sun_path, str, len);
 299
 300     return 0;
 301 }
 302 #endif
 303
 304 void qemu_format_nic_info_str(VLANClientState *vc, uint8_t macaddr[6])
 305 {
 306     snprintf(vc->info_str, sizeof(vc->info_str),
 307              "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x",
 308              vc->model,
 309              macaddr[0], macaddr[1], macaddr[2],
 310              macaddr[3], macaddr[4], macaddr[5]);
 311 }
 312
 313 static char *assign_name(VLANClientState *vc1, const char *model)
 314 {
 315     VLANState *vlan;
 316     char buf[256];
 317     int id = 0;
 318
 319     for (vlan = first_vlan; vlan; vlan = vlan->next) {
 320         VLANClientState *vc;
 321
 322         for (vc = vlan->first_client; vc; vc = vc->next)
 323             if (vc != vc1 && strcmp(vc->model, model) == 0)
 324                 id++;
 325     }
 326
 327     snprintf(buf, sizeof(buf), "%s.%d", model, id);
 328
 329     return strdup(buf);
 330 }
 331
 332 VLANClientState *qemu_new_vlan_client(VLANState *vlan,
 333                                       const char *model,
 334                                       const char *name,
 335                                       NetCanReceive *can_receive,
 336                                       NetReceive *receive,
 337                                       NetReceiveIOV *receive_iov,
 338                                       NetCleanup *cleanup,
 339                                       void *opaque)
 340 {
 341     VLANClientState *vc, **pvc;
 342     vc = qemu_mallocz(sizeof(VLANClientState));
 343     vc->model = strdup(model);
 344     if (name)
 345         vc->name = strdup(name);
 346     else
 347         vc->name = assign_name(vc, model);
 348     vc->can_receive = can_receive;
 349     vc->receive = receive;
 350     vc->receive_iov = receive_iov;
 351     vc->cleanup = cleanup;
 352     vc->opaque = opaque;
 353     vc->vlan = vlan;
 354
 355     vc->next = NULL;
 356     pvc = &vlan->first_client;
 357     while (*pvc != NULL)
 358         pvc = &(*pvc)->next;
 359     *pvc = vc;
 360     return vc;
 361 }
 362
 363 void qemu_del_vlan_client(VLANClientState *vc)
 364 {
 365     VLANClientState **pvc = &vc->vlan->first_client;
 366
 367     while (*pvc != NULL)
 368         if (*pvc == vc) {
 369             *pvc = vc->next;
 370             if (vc->cleanup) {
 371                 vc->cleanup(vc);
 372             }
 373             free(vc->name);
 374             free(vc->model);
 375             qemu_free(vc);
 376             break;
 377         } else
 378             pvc = &(*pvc)->next;
 379 }
 380
 381 VLANClientState *qemu_find_vlan_client(VLANState *vlan, void *opaque)
 382 {
 383     VLANClientState **pvc = &vlan->first_client;
 384
 385     while (*pvc != NULL)
 386         if ((*pvc)->opaque == opaque)
 387             return *pvc;
 388         else
 389             pvc = &(*pvc)->next;
 390
 391     return NULL;
 392 }
 393
 394 int qemu_can_send_packet(VLANClientState *sender)
 395 {
 396     VLANState *vlan = sender->vlan;
 397     VLANClientState *vc;
 398
 399     for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
 400         if (vc == sender) {
 401             continue;
 402         }
 403
 404         /* no can_receive() handler, they can always receive */
 405         if (!vc->can_receive || vc->can_receive(vc)) {
 406             return 1;
 407         }
 408     }
 409     return 0;
 410 }
 411
 412 static int
 413 qemu_deliver_packet(VLANClientState *sender, const uint8_t *buf, int size)
 414 {
 415     VLANClientState *vc;
 416     int ret = -1;
 417
 418     sender->vlan->delivering = 1;
 419
 420     for (vc = sender->vlan->first_client; vc != NULL; vc = vc->next) {
 421         ssize_t len;
 422
 423         if (vc == sender) {
 424             continue;
 425         }
 426
 427         if (vc->link_down) {
 428             ret = size;
 429             continue;
 430         }
 431
 432         len = vc->receive(vc, buf, size);
 433
 434         ret = (ret >= 0) ? ret : len;
 435     }
 436
 437     sender->vlan->delivering = 0;
 438
 439     return ret;
 440 }
 441
 442 void qemu_purge_queued_packets(VLANClientState *vc)
 443 {
 444     VLANPacket **pp = &vc->vlan->send_queue;
 445
 446     while (*pp != NULL) {
 447         VLANPacket *packet = *pp;
 448
 449         if (packet->sender == vc) {
 450             *pp = packet->next;
 451             qemu_free(packet);
 452         } else {
 453             pp = &packet->next;
 454         }
 455     }
 456 }
 457
 458 void qemu_flush_queued_packets(VLANClientState *vc)
 459 {
 460     VLANPacket *packet;
 461
 462     while ((packet = vc->vlan->send_queue) != NULL) {
 463         int ret;
 464
 465         vc->vlan->send_queue = packet->next;
 466
 467         ret = qemu_deliver_packet(packet->sender, packet->data, packet->size);
 468         if (ret == 0 && packet->sent_cb != NULL) {
 469             packet->next = vc->vlan->send_queue;
 470             vc->vlan->send_queue = packet;
 471             break;
 472         }
 473
 474         if (packet->sent_cb)
 475             packet->sent_cb(packet->sender);
 476
 477         qemu_free(packet);
 478     }
 479 }
 480
 481 static void qemu_enqueue_packet(VLANClientState *sender,
 482                                 const uint8_t *buf, int size,
 483                                 NetPacketSent *sent_cb)
 484 {
 485     VLANPacket *packet;
 486
 487     packet = qemu_malloc(sizeof(VLANPacket) + size);
 488     packet->next = sender->vlan->send_queue;
 489     packet->sender = sender;
 490     packet->size = size;
 491     packet->sent_cb = sent_cb;
 492     memcpy(packet->data, buf, size);
 493     sender->vlan->send_queue = packet;
 494 }
 495
 496 ssize_t qemu_send_packet_async(VLANClientState *sender,
 497                                const uint8_t *buf, int size,
 498                                NetPacketSent *sent_cb)
 499 {
 500     int ret;
 501
 502     if (sender->link_down) {
 503         return size;
 504     }
 505
 506 #ifdef DEBUG_NET
 507     printf("vlan %d send:\n", sender->vlan->id);
 508     hex_dump(stdout, buf, size);
 509 #endif
 510
 511     if (sender->vlan->delivering) {
 512         qemu_enqueue_packet(sender, buf, size, NULL);
 513         return size;
 514     }
 515
 516     ret = qemu_deliver_packet(sender, buf, size);
 517     if (ret == 0 && sent_cb != NULL) {
 518         qemu_enqueue_packet(sender, buf, size, sent_cb);
 519         return 0;
 520     }
 521
 522     qemu_flush_queued_packets(sender);
 523
 524     return ret;
 525 }
 526
 527 void qemu_send_packet(VLANClientState *vc, const uint8_t *buf, int size)
 528 {
 529     qemu_send_packet_async(vc, buf, size, NULL);
 530 }
 531
 532 static ssize_t vc_sendv_compat(VLANClientState *vc, const struct iovec *iov,
 533                                int iovcnt)
 534 {
 535     uint8_t buffer[4096];
 536     size_t offset = 0;
 537     int i;
 538
 539     for (i = 0; i < iovcnt; i++) {
 540         size_t len;
 541
 542         len = MIN(sizeof(buffer) - offset, iov[i].iov_len);
 543         memcpy(buffer + offset, iov[i].iov_base, len);
 544         offset += len;
 545     }
 546
 547     return vc->receive(vc, buffer, offset);
 548 }
 549
 550 static ssize_t calc_iov_length(const struct iovec *iov, int iovcnt)
 551 {
 552     size_t offset = 0;
 553     int i;
 554
 555     for (i = 0; i < iovcnt; i++)
 556         offset += iov[i].iov_len;
 557     return offset;
 558 }
 559
 560 static int qemu_deliver_packet_iov(VLANClientState *sender,
 561                                    const struct iovec *iov, int iovcnt)
 562 {
 563     VLANClientState *vc;
 564     int ret = -1;
 565
 566     sender->vlan->delivering = 1;
 567
 568     for (vc = sender->vlan->first_client; vc != NULL; vc = vc->next) {
 569         ssize_t len;
 570
 571         if (vc == sender) {
 572             continue;
 573         }
 574
 575         if (vc->link_down) {
 576             ret = calc_iov_length(iov, iovcnt);
 577             continue;
 578         }
 579
 580         if (vc->receive_iov) {
 581             len = vc->receive_iov(vc, iov, iovcnt);
 582         } else {
 583             len = vc_sendv_compat(vc, iov, iovcnt);
 584         }
 585
 586         ret = (ret >= 0) ? ret : len;
 587     }
 588
 589     sender->vlan->delivering = 0;
 590
 591     return ret;
 592 }
 593
 594 static ssize_t qemu_enqueue_packet_iov(VLANClientState *sender,
 595                                        const struct iovec *iov, int iovcnt,
 596                                        NetPacketSent *sent_cb)
 597 {
 598     VLANPacket *packet;
 599     size_t max_len = 0;
 600     int i;
 601
 602     max_len = calc_iov_length(iov, iovcnt);
 603
 604     packet = qemu_malloc(sizeof(VLANPacket) + max_len);
 605     packet->next = sender->vlan->send_queue;
 606     packet->sender = sender;
 607     packet->sent_cb = sent_cb;
 608     packet->size = 0;
 609
 610     for (i = 0; i < iovcnt; i++) {
 611         size_t len = iov[i].iov_len;
 612
 613         memcpy(packet->data + packet->size, iov[i].iov_base, len);
 614         packet->size += len;
 615     }
 616
 617     sender->vlan->send_queue = packet;
 618
 619     return packet->size;
 620 }
 621
 622 ssize_t qemu_sendv_packet_async(VLANClientState *sender,
 623                                 const struct iovec *iov, int iovcnt,
 624                                 NetPacketSent *sent_cb)
 625 {
 626     int ret;
 627
 628     if (sender->link_down) {
 629         return calc_iov_length(iov, iovcnt);
 630     }
 631
 632     if (sender->vlan->delivering) {
 633         return qemu_enqueue_packet_iov(sender, iov, iovcnt, NULL);
 634     }
 635
 636     ret = qemu_deliver_packet_iov(sender, iov, iovcnt);
 637     if (ret == 0 && sent_cb != NULL) {
 638         qemu_enqueue_packet_iov(sender, iov, iovcnt, sent_cb);
 639         return 0;
 640     }
 641
 642     qemu_flush_queued_packets(sender);
 643
 644     return ret;
 645 }
 646
 647 ssize_t
 648 qemu_sendv_packet(VLANClientState *vc, const struct iovec *iov, int iovcnt)
 649 {
 650     return qemu_sendv_packet_async(vc, iov, iovcnt, NULL);
 651 }
 652
 653 static void config_error(Monitor *mon, const char *fmt, ...)
 654 {
 655     va_list ap;
 656
 657     va_start(ap, fmt);
 658     if (mon) {
 659         monitor_vprintf(mon, fmt, ap);
 660     } else {
 661         fprintf(stderr, "qemu: ");
 662         vfprintf(stderr, fmt, ap);
 663         exit(1);
 664     }
 665     va_end(ap);
 666 }
 667
 668 #if defined(CONFIG_SLIRP)
 669
 670 /* slirp network adapter */
 671
 672 struct slirp_config_str {
 673     struct slirp_config_str *next;
 674     const char *str;
 675 };
 676
 677 static int slirp_inited;
 678 static struct slirp_config_str *slirp_redirs;
 679 #ifndef _WIN32
 680 static const char *slirp_smb_export;
 681 #endif
 682 static VLANClientState *slirp_vc;
 683
 684 #ifndef _WIN32
 685 static void slirp_smb(const char *exported_dir);
 686 #endif
 687 static void slirp_redirection(Monitor *mon, const char *redir_str);
 688
 689 int slirp_can_output(void)
 690 {
 691     return !slirp_vc || qemu_can_send_packet(slirp_vc);
 692 }
 693
 694 void slirp_output(const uint8_t *pkt, int pkt_len)
 695 {
 696 #ifdef DEBUG_SLIRP
 697     printf("slirp output:\n");
 698     hex_dump(stdout, pkt, pkt_len);
 699 #endif
 700     if (!slirp_vc)
 701         return;
 702     qemu_send_packet(slirp_vc, pkt, pkt_len);
 703 }
 704
 705 int slirp_is_inited(void)
 706 {
 707     return slirp_inited;
 708 }
 709
 710 static ssize_t slirp_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
 711 {
 712 #ifdef DEBUG_SLIRP
 713     printf("slirp input:\n");
 714     hex_dump(stdout, buf, size);
 715 #endif
 716     slirp_input(buf, size);
 717     return size;
 718 }
 719
 720 static int slirp_in_use;
 721
 722 static void net_slirp_cleanup(VLANClientState *vc)
 723 {
 724     slirp_in_use = 0;
 725 }
 726
 727 static int net_slirp_init(VLANState *vlan, const char *model, const char *name,
 728                           int restricted, const char *ip)
 729 {
 730     if (slirp_in_use) {
 731         /* slirp only supports a single instance so far */
 732         return -1;
 733     }
 734     if (!slirp_inited) {
 735         slirp_inited = 1;
 736         slirp_init(restricted, ip);
 737
 738         while (slirp_redirs) {
 739             struct slirp_config_str *config = slirp_redirs;
 740
 741             slirp_redirection(NULL, config->str);
 742             slirp_redirs = config->next;
 743             qemu_free(config);
 744         }
 745 #ifndef _WIN32
 746         if (slirp_smb_export) {
 747             slirp_smb(slirp_smb_export);
 748         }
 749 #endif
 750     }
 751
 752     slirp_vc = qemu_new_vlan_client(vlan, model, name, NULL, slirp_receive,
 753                                     NULL, net_slirp_cleanup, NULL);
 754     slirp_vc->info_str[0] = '\0';
 755     slirp_in_use = 1;
 756     return 0;
 757 }
 758
 759 static void net_slirp_redir_print(void *opaque, int is_udp,
 760                                   struct in_addr *laddr, u_int lport,
 761                                   struct in_addr *faddr, u_int fport)
 762 {
 763     Monitor *mon = (Monitor *)opaque;
 764     uint32_t h_addr;
 765     uint32_t g_addr;
 766     char buf[16];
 767
 768     h_addr = ntohl(faddr->s_addr);
 769     g_addr = ntohl(laddr->s_addr);
 770
 771     monitor_printf(mon, "  %s |", is_udp ? "udp" : "tcp" );
 772     snprintf(buf, 15, "%d.%d.%d.%d", (h_addr >> 24) & 0xff,
 773                                      (h_addr >> 16) & 0xff,
 774                                      (h_addr >> 8) & 0xff,
 775                                      (h_addr) & 0xff);
 776     monitor_printf(mon, " %15s |", buf);
 777     monitor_printf(mon, " %5d |", fport);
 778
 779     snprintf(buf, 15, "%d.%d.%d.%d", (g_addr >> 24) & 0xff,
 780                                      (g_addr >> 16) & 0xff,
 781                                      (g_addr >> 8) & 0xff,
 782                                      (g_addr) & 0xff);
 783     monitor_printf(mon, " %15s |", buf);
 784     monitor_printf(mon, " %5d\n", lport);
 785
 786 }
 787
 788 static void net_slirp_redir_list(Monitor *mon)
 789 {
 790     if (!mon)
 791         return;
 792
 793     monitor_printf(mon, " Prot |    Host Addr    | HPort |    Guest Addr   | GPort\n");
 794     monitor_printf(mon, "      |                 |       |                 |      \n");
 795     slirp_redir_loop(net_slirp_redir_print, mon);
 796 }
 797
 798 static void net_slirp_redir_rm(Monitor *mon, const char *port_str)
 799 {
 800     int host_port;
 801     char buf[256] = "";
 802     const char *p = port_str;
 803     int is_udp = 0;
 804     int n;
 805
 806     if (!mon)
 807         return;
 808
 809     if (!port_str || !port_str[0])
 810         goto fail_syntax;
 811
 812     get_str_sep(buf, sizeof(buf), &p, ':');
 813
 814     if (!strcmp(buf, "tcp") || buf[0] == '\0') {
 815         is_udp = 0;
 816     } else if (!strcmp(buf, "udp")) {
 817         is_udp = 1;
 818     } else {
 819         goto fail_syntax;
 820     }
 821
 822     host_port = atoi(p);
 823
 824     n = slirp_redir_rm(is_udp, host_port);
 825
 826     monitor_printf(mon, "removed %d redirections to %s port %d\n", n,
 827                         is_udp ? "udp" : "tcp", host_port);
 828     return;
 829
 830  fail_syntax:
 831     monitor_printf(mon, "invalid format\n");
 832 }
 833
 834 static void slirp_redirection(Monitor *mon, const char *redir_str)
 835 {
 836     struct in_addr guest_addr;
 837     int host_port, guest_port;
 838     const char *p;
 839     char buf[256], *r;
 840     int is_udp;
 841
 842     p = redir_str;
 843     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 844         goto fail_syntax;
 845     }
 846     if (!strcmp(buf, "tcp") || buf[0] == '\0') {
 847         is_udp = 0;
 848     } else if (!strcmp(buf, "udp")) {
 849         is_udp = 1;
 850     } else {
 851         goto fail_syntax;
 852     }
 853
 854     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 855         goto fail_syntax;
 856     }
 857     host_port = strtol(buf, &r, 0);
 858     if (r == buf) {
 859         goto fail_syntax;
 860     }
 861
 862     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 863         goto fail_syntax;
 864     }
 865     if (buf[0] == '\0') {
 866         pstrcpy(buf, sizeof(buf), "10.0.2.15");
 867     }
 868     if (!inet_aton(buf, &guest_addr)) {
 869         goto fail_syntax;
 870     }
 871
 872     guest_port = strtol(p, &r, 0);
 873     if (r == p) {
 874         goto fail_syntax;
 875     }
 876
 877     if (slirp_redir(is_udp, host_port, guest_addr, guest_port) < 0) {
 878         config_error(mon, "could not set up redirection '%s'\n", redir_str);
 879     }
 880     return;
 881
 882  fail_syntax:
 883     config_error(mon, "invalid redirection format '%s'\n", redir_str);
 884 }
 885
 886 void net_slirp_redir(Monitor *mon, const char *redir_str, const char *redir_opt2)
 887 {
 888     struct slirp_config_str *config;
 889
 890     if (!slirp_inited) {
 891         if (mon) {
 892             monitor_printf(mon, "user mode network stack not in use\n");
 893         } else {
 894             config = qemu_malloc(sizeof(*config));
 895             config->str = redir_str;
 896             config->next = slirp_redirs;
 897             slirp_redirs = config;
 898         }
 899         return;
 900     }
 901
 902     if (!strcmp(redir_str, "remove")) {
 903         net_slirp_redir_rm(mon, redir_opt2);
 904         return;
 905     }
 906
 907     if (!strcmp(redir_str, "list")) {
 908         net_slirp_redir_list(mon);
 909         return;
 910     }
 911
 912     slirp_redirection(mon, redir_str);
 913 }
 914
 915 #ifndef _WIN32
 916
 917 static char smb_dir[1024];
 918
 919 static void erase_dir(char *dir_name)
 920 {
 921     DIR *d;
 922     struct dirent *de;
 923     char filename[1024];
 924
 925     /* erase all the files in the directory */
 926     if ((d = opendir(dir_name)) != NULL) {
 927         for(;;) {
 928             de = readdir(d);
 929             if (!de)
 930                 break;
 931             if (strcmp(de->d_name, ".") != 0 &&
 932                 strcmp(de->d_name, "..") != 0) {
 933                 snprintf(filename, sizeof(filename), "%s/%s",
 934                          smb_dir, de->d_name);
 935                 if (unlink(filename) != 0)  /* is it a directory? */
 936                     erase_dir(filename);
 937             }
 938         }
 939         closedir(d);
 940         rmdir(dir_name);
 941     }
 942 }
 943
 944 /* automatic user mode samba server configuration */
 945 static void smb_exit(void)
 946 {
 947     erase_dir(smb_dir);
 948 }
 949
 950 static void slirp_smb(const char *exported_dir)
 951 {
 952     char smb_conf[1024];
 953     char smb_cmdline[1024];
 954     FILE *f;
 955
 956     /* XXX: better tmp dir construction */
 957     snprintf(smb_dir, sizeof(smb_dir), "/tmp/qemu-smb.%ld", (long)getpid());
 958     if (mkdir(smb_dir, 0700) < 0) {
 959         fprintf(stderr, "qemu: could not create samba server dir '%s'\n", smb_dir);
 960         exit(1);
 961     }
 962     snprintf(smb_conf, sizeof(smb_conf), "%s/%s", smb_dir, "smb.conf");
 963
 964     f = fopen(smb_conf, "w");
 965     if (!f) {
 966         fprintf(stderr, "qemu: could not create samba server configuration file '%s'\n", smb_conf);
 967         exit(1);
 968     }
 969     fprintf(f,
 970             "[global]\n"
 971             "private dir=%s\n"
 972             "smb ports=0\n"
 973             "socket address=127.0.0.1\n"
 974             "pid directory=%s\n"
 975             "lock directory=%s\n"
 976             "log file=%s/log.smbd\n"
 977             "smb passwd file=%s/smbpasswd\n"
 978             "security = share\n"
 979             "[qemu]\n"
 980             "path=%s\n"
 981             "read only=no\n"
 982             "guest ok=yes\n",
 983             smb_dir,
 984             smb_dir,
 985             smb_dir,
 986             smb_dir,
 987             smb_dir,
 988             exported_dir
 989             );
 990     fclose(f);
 991     atexit(smb_exit);
 992
 993     snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -s %s",
 994              SMBD_COMMAND, smb_conf);
 995
 996     slirp_add_exec(0, smb_cmdline, 4, 139);
 997 }
 998
 999 /* automatic user mode samba server configuration */
1000 void net_slirp_smb(const char *exported_dir)
1001 {
1002     if (slirp_smb_export) {
1003         fprintf(stderr, "-smb given twice\n");
1004         exit(1);
1005     }
1006     slirp_smb_export = exported_dir;
1007     if (slirp_inited) {
1008         slirp_smb(exported_dir);
1009     }
1010 }
1011
1012 #endif /* !defined(_WIN32) */
1013
1014 void do_info_slirp(Monitor *mon)
1015 {
1016     slirp_stats();
1017 }
1018
1019 struct VMChannel {
1020     CharDriverState *hd;
1021     int port;
1022 };
1023
1024 static int vmchannel_can_read(void *opaque)
1025 {
1026     struct VMChannel *vmc = (struct VMChannel*)opaque;
1027     return slirp_socket_can_recv(4, vmc->port);
1028 }
1029
1030 static void vmchannel_read(void *opaque, const uint8_t *buf, int size)
1031 {
1032     struct VMChannel *vmc = (struct VMChannel*)opaque;
1033     slirp_socket_recv(4, vmc->port, buf, size);
1034 }
1035
1036 #endif /* CONFIG_SLIRP */
1037
1038 #if !defined(_WIN32)
1039
1040 typedef struct TAPState {
1041     VLANClientState *vc;
1042     int fd;
1043     char down_script[1024];
1044     char down_script_arg[128];
1045     uint8_t buf[4096];
1046     unsigned int read_poll : 1;
1047     unsigned int write_poll : 1;
1048 } TAPState;
1049
1050 static int launch_script(const char *setup_script, const char *ifname, int fd);
1051
1052 static int tap_can_send(void *opaque);
1053 static void tap_send(void *opaque);
1054 static void tap_writable(void *opaque);
1055
1056 static void tap_update_fd_handler(TAPState *s)
1057 {
1058     qemu_set_fd_handler2(s->fd,
1059                          s->read_poll  ? tap_can_send : NULL,
1060                          s->read_poll  ? tap_send     : NULL,
1061                          s->write_poll ? tap_writable : NULL,
1062                          s);
1063 }
1064
1065 static void tap_read_poll(TAPState *s, int enable)
1066 {
1067     s->read_poll = !!enable;
1068     tap_update_fd_handler(s);
1069 }
1070
1071 static void tap_write_poll(TAPState *s, int enable)
1072 {
1073     s->write_poll = !!enable;
1074     tap_update_fd_handler(s);
1075 }
1076
1077 static void tap_writable(void *opaque)
1078 {
1079     TAPState *s = opaque;
1080
1081     tap_write_poll(s, 0);
1082
1083     qemu_flush_queued_packets(s->vc);
1084 }
1085
1086 static ssize_t tap_receive_iov(VLANClientState *vc, const struct iovec *iov,
1087                                int iovcnt)
1088 {
1089     TAPState *s = vc->opaque;
1090     ssize_t len;
1091
1092     do {
1093         len = writev(s->fd, iov, iovcnt);
1094     } while (len == -1 && errno == EINTR);
1095
1096     if (len == -1 && errno == EAGAIN) {
1097         tap_write_poll(s, 1);
1098         return 0;
1099     }
1100
1101     return len;
1102 }
1103
1104 static ssize_t tap_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1105 {
1106     TAPState *s = vc->opaque;
1107     ssize_t len;
1108
1109     do {
1110         len = write(s->fd, buf, size);
1111     } while (len == -1 && (errno == EINTR || errno == EAGAIN));
1112
1113     return len;
1114 }
1115
1116 static int tap_can_send(void *opaque)
1117 {
1118     TAPState *s = opaque;
1119
1120     return qemu_can_send_packet(s->vc);
1121 }
1122
1123 #ifdef __sun__
1124 static ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
1125 {
1126     struct strbuf sbuf;
1127     int f = 0;
1128
1129     sbuf.maxlen = maxlen;
1130     sbuf.buf = (char *)buf;
1131
1132     return getmsg(tapfd, NULL, &sbuf, &f) >= 0 ? sbuf.len : -1;
1133 }
1134 #else
1135 static ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
1136 {
1137     return read(tapfd, buf, maxlen);
1138 }
1139 #endif
1140
1141 static void tap_send_completed(VLANClientState *vc)
1142 {
1143     TAPState *s = vc->opaque;
1144     tap_read_poll(s, 1);
1145 }
1146
1147 static void tap_send(void *opaque)
1148 {
1149     TAPState *s = opaque;
1150     int size;
1151
1152     do {
1153         size = tap_read_packet(s->fd, s->buf, sizeof(s->buf));
1154         if (size <= 0) {
1155             break;
1156         }
1157
1158         size = qemu_send_packet_async(s->vc, s->buf, size, tap_send_completed);
1159         if (size == 0) {
1160             tap_read_poll(s, 0);
1161         }
1162     } while (size > 0);
1163 }
1164
1165 static void tap_cleanup(VLANClientState *vc)
1166 {
1167     TAPState *s = vc->opaque;
1168
1169     qemu_purge_queued_packets(vc);
1170
1171     if (s->down_script[0])
1172         launch_script(s->down_script, s->down_script_arg, s->fd);
1173
1174     tap_read_poll(s, 0);
1175     tap_write_poll(s, 0);
1176     close(s->fd);
1177     qemu_free(s);
1178 }
1179
1180 /* fd support */
1181
1182 static TAPState *net_tap_fd_init(VLANState *vlan,
1183                                  const char *model,
1184                                  const char *name,
1185                                  int fd)
1186 {
1187     TAPState *s;
1188
1189     s = qemu_mallocz(sizeof(TAPState));
1190     s->fd = fd;
1191     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, tap_receive,
1192                                  tap_receive_iov, tap_cleanup, s);
1193     tap_read_poll(s, 1);
1194     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "fd=%d", fd);
1195     return s;
1196 }
1197
1198 #if defined (HOST_BSD) || defined (__FreeBSD_kernel__)
1199 static int tap_open(char *ifname, int ifname_size)
1200 {
1201     int fd;
1202     char *dev;
1203     struct stat s;
1204
1205     TFR(fd = open("/dev/tap", O_RDWR));
1206     if (fd < 0) {
1207         fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n");
1208         return -1;
1209     }
1210
1211     fstat(fd, &s);
1212     dev = devname(s.st_rdev, S_IFCHR);
1213     pstrcpy(ifname, ifname_size, dev);
1214
1215     fcntl(fd, F_SETFL, O_NONBLOCK);
1216     return fd;
1217 }
1218 #elif defined(__sun__)
1219 #define TUNNEWPPA       (('T'<<16) | 0x0001)
1220 /*
1221  * Allocate TAP device, returns opened fd.
1222  * Stores dev name in the first arg(must be large enough).
1223  */
1224 static int tap_alloc(char *dev, size_t dev_size)
1225 {
1226     int tap_fd, if_fd, ppa = -1;
1227     static int ip_fd = 0;
1228     char *ptr;
1229
1230     static int arp_fd = 0;
1231     int ip_muxid, arp_muxid;
1232     struct strioctl  strioc_if, strioc_ppa;
1233     int link_type = I_PLINK;;
1234     struct lifreq ifr;
1235     char actual_name[32] = "";
1236
1237     memset(&ifr, 0x0, sizeof(ifr));
1238
1239     if( *dev ){
1240        ptr = dev;
1241        while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
1242        ppa = atoi(ptr);
1243     }
1244
1245     /* Check if IP device was opened */
1246     if( ip_fd )
1247        close(ip_fd);
1248
1249     TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
1250     if (ip_fd < 0) {
1251        syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)");
1252        return -1;
1253     }
1254
1255     TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
1256     if (tap_fd < 0) {
1257        syslog(LOG_ERR, "Can't open /dev/tap");
1258        return -1;
1259     }
1260
1261     /* Assign a new PPA and get its unit number. */
1262     strioc_ppa.ic_cmd = TUNNEWPPA;
1263     strioc_ppa.ic_timout = 0;
1264     strioc_ppa.ic_len = sizeof(ppa);
1265     strioc_ppa.ic_dp = (char *)&ppa;
1266     if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
1267        syslog (LOG_ERR, "Can't assign new interface");
1268
1269     TFR(if_fd = open("/dev/tap", O_RDWR, 0));
1270     if (if_fd < 0) {
1271        syslog(LOG_ERR, "Can't open /dev/tap (2)");
1272        return -1;
1273     }
1274     if(ioctl(if_fd, I_PUSH, "ip") < 0){
1275        syslog(LOG_ERR, "Can't push IP module");
1276        return -1;
1277     }
1278
1279     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
1280         syslog(LOG_ERR, "Can't get flags\n");
1281
1282     snprintf (actual_name, 32, "tap%d", ppa);
1283     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
1284
1285     ifr.lifr_ppa = ppa;
1286     /* Assign ppa according to the unit number returned by tun device */
1287
1288     if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
1289         syslog (LOG_ERR, "Can't set PPA %d", ppa);
1290     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
1291         syslog (LOG_ERR, "Can't get flags\n");
1292     /* Push arp module to if_fd */
1293     if (ioctl (if_fd, I_PUSH, "arp") < 0)
1294         syslog (LOG_ERR, "Can't push ARP module (2)");
1295
1296     /* Push arp module to ip_fd */
1297     if (ioctl (ip_fd, I_POP, NULL) < 0)
1298         syslog (LOG_ERR, "I_POP failed\n");
1299     if (ioctl (ip_fd, I_PUSH, "arp") < 0)
1300         syslog (LOG_ERR, "Can't push ARP module (3)\n");
1301     /* Open arp_fd */
1302     TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
1303     if (arp_fd < 0)
1304        syslog (LOG_ERR, "Can't open %s\n", "/dev/tap");
1305
1306     /* Set ifname to arp */
1307     strioc_if.ic_cmd = SIOCSLIFNAME;
1308     strioc_if.ic_timout = 0;
1309     strioc_if.ic_len = sizeof(ifr);
1310     strioc_if.ic_dp = (char *)&ifr;
1311     if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
1312         syslog (LOG_ERR, "Can't set ifname to arp\n");
1313     }
1314
1315     if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
1316        syslog(LOG_ERR, "Can't link TAP device to IP");
1317        return -1;
1318     }
1319
1320     if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
1321         syslog (LOG_ERR, "Can't link TAP device to ARP");
1322
1323     close (if_fd);
1324
1325     memset(&ifr, 0x0, sizeof(ifr));
1326     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
1327     ifr.lifr_ip_muxid  = ip_muxid;
1328     ifr.lifr_arp_muxid = arp_muxid;
1329
1330     if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
1331     {
1332       ioctl (ip_fd, I_PUNLINK , arp_muxid);
1333       ioctl (ip_fd, I_PUNLINK, ip_muxid);
1334       syslog (LOG_ERR, "Can't set multiplexor id");
1335     }
1336
1337     snprintf(dev, dev_size, "tap%d", ppa);
1338     return tap_fd;
1339 }
1340
1341 static int tap_open(char *ifname, int ifname_size)
1342 {
1343     char  dev[10]="";
1344     int fd;
1345     if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){
1346        fprintf(stderr, "Cannot allocate TAP device\n");
1347        return -1;
1348     }
1349     pstrcpy(ifname, ifname_size, dev);
1350     fcntl(fd, F_SETFL, O_NONBLOCK);
1351     return fd;
1352 }
1353 #elif defined (_AIX)
1354 static int tap_open(char *ifname, int ifname_size)
1355 {
1356     fprintf (stderr, "no tap on AIX\n");
1357     return -1;
1358 }
1359 #else
1360 static int tap_open(char *ifname, int ifname_size)
1361 {
1362     struct ifreq ifr;
1363     int fd, ret;
1364
1365     TFR(fd = open("/dev/net/tun", O_RDWR));
1366     if (fd < 0) {
1367         fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n");
1368         return -1;
1369     }
1370     memset(&ifr, 0, sizeof(ifr));
1371     ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
1372     if (ifname[0] != '\0')
1373         pstrcpy(ifr.ifr_name, IFNAMSIZ, ifname);
1374     else
1375         pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d");
1376     ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
1377     if (ret != 0) {
1378         fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n");
1379         close(fd);
1380         return -1;
1381     }
1382     pstrcpy(ifname, ifname_size, ifr.ifr_name);
1383     fcntl(fd, F_SETFL, O_NONBLOCK);
1384     return fd;
1385 }
1386 #endif
1387
1388 static int launch_script(const char *setup_script, const char *ifname, int fd)
1389 {
1390     sigset_t oldmask, mask;
1391     int pid, status;
1392     char *args[3];
1393     char **parg;
1394
1395     sigemptyset(&mask);
1396     sigaddset(&mask, SIGCHLD);
1397     sigprocmask(SIG_BLOCK, &mask, &oldmask);
1398
1399     /* try to launch network script */
1400     pid = fork();
1401     if (pid == 0) {
1402         int open_max = sysconf(_SC_OPEN_MAX), i;
1403
1404         for (i = 0; i < open_max; i++) {
1405             if (i != STDIN_FILENO &&
1406                 i != STDOUT_FILENO &&
1407                 i != STDERR_FILENO &&
1408                 i != fd) {
1409                 close(i);
1410             }
1411         }
1412         parg = args;
1413         *parg++ = (char *)setup_script;
1414         *parg++ = (char *)ifname;
1415         *parg++ = NULL;
1416         execv(setup_script, args);
1417         _exit(1);
1418     } else if (pid > 0) {
1419         while (waitpid(pid, &status, 0) != pid) {
1420             /* loop */
1421         }
1422         sigprocmask(SIG_SETMASK, &oldmask, NULL);
1423
1424         if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
1425             return 0;
1426         }
1427     }
1428     fprintf(stderr, "%s: could not launch network script\n", setup_script);
1429     return -1;
1430 }
1431
1432 static int net_tap_init(VLANState *vlan, const char *model,
1433                         const char *name, const char *ifname1,
1434                         const char *setup_script, const char *down_script)
1435 {
1436     TAPState *s;
1437     int fd;
1438     char ifname[128];
1439
1440     if (ifname1 != NULL)
1441         pstrcpy(ifname, sizeof(ifname), ifname1);
1442     else
1443         ifname[0] = '\0';
1444     TFR(fd = tap_open(ifname, sizeof(ifname)));
1445     if (fd < 0)
1446         return -1;
1447
1448     if (!setup_script || !strcmp(setup_script, "no"))
1449         setup_script = "";
1450     if (setup_script[0] != '\0') {
1451         if (launch_script(setup_script, ifname, fd))
1452             return -1;
1453     }
1454     s = net_tap_fd_init(vlan, model, name, fd);
1455     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1456              "ifname=%s,script=%s,downscript=%s",
1457              ifname, setup_script, down_script);
1458     if (down_script && strcmp(down_script, "no")) {
1459         snprintf(s->down_script, sizeof(s->down_script), "%s", down_script);
1460         snprintf(s->down_script_arg, sizeof(s->down_script_arg), "%s", ifname);
1461     }
1462     return 0;
1463 }
1464
1465 #endif /* !_WIN32 */
1466
1467 #if defined(CONFIG_VDE)
1468 typedef struct VDEState {
1469     VLANClientState *vc;
1470     VDECONN *vde;
1471 } VDEState;
1472
1473 static void vde_to_qemu(void *opaque)
1474 {
1475     VDEState *s = opaque;
1476     uint8_t buf[4096];
1477     int size;
1478
1479     size = vde_recv(s->vde, (char *)buf, sizeof(buf), 0);
1480     if (size > 0) {
1481         qemu_send_packet(s->vc, buf, size);
1482     }
1483 }
1484
1485 static ssize_t vde_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1486 {
1487     VDEState *s = vc->opaque;
1488     ssize_t ret;
1489
1490     do {
1491       ret = vde_send(s->vde, (const char *)buf, size, 0);
1492     } while (ret < 0 && errno == EINTR);
1493
1494     return ret;
1495 }
1496
1497 static void vde_cleanup(VLANClientState *vc)
1498 {
1499     VDEState *s = vc->opaque;
1500     qemu_set_fd_handler(vde_datafd(s->vde), NULL, NULL, NULL);
1501     vde_close(s->vde);
1502     qemu_free(s);
1503 }
1504
1505 static int net_vde_init(VLANState *vlan, const char *model,
1506                         const char *name, const char *sock,
1507                         int port, const char *group, int mode)
1508 {
1509     VDEState *s;
1510     char *init_group = strlen(group) ? (char *)group : NULL;
1511     char *init_sock = strlen(sock) ? (char *)sock : NULL;
1512
1513     struct vde_open_args args = {
1514         .port = port,
1515         .group = init_group,
1516         .mode = mode,
1517     };
1518
1519     s = qemu_mallocz(sizeof(VDEState));
1520     s->vde = vde_open(init_sock, (char *)"QEMU", &args);
1521     if (!s->vde){
1522         free(s);
1523         return -1;
1524     }
1525     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, vde_receive,
1526                                  NULL, vde_cleanup, s);
1527     qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
1528     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "sock=%s,fd=%d",
1529              sock, vde_datafd(s->vde));
1530     return 0;
1531 }
1532 #endif
1533
1534 /* network connection */
1535 typedef struct NetSocketState {
1536     VLANClientState *vc;
1537     int fd;
1538     int state; /* 0 = getting length, 1 = getting data */
1539     unsigned int index;
1540     unsigned int packet_len;
1541     uint8_t buf[4096];
1542     struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
1543 } NetSocketState;
1544
1545 typedef struct NetSocketListenState {
1546     VLANState *vlan;
1547     char *model;
1548     char *name;
1549     int fd;
1550 } NetSocketListenState;
1551
1552 /* XXX: we consider we can send the whole packet without blocking */
1553 static ssize_t net_socket_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1554 {
1555     NetSocketState *s = vc->opaque;
1556     uint32_t len;
1557     len = htonl(size);
1558
1559     send_all(s->fd, (const uint8_t *)&len, sizeof(len));
1560     return send_all(s->fd, buf, size);
1561 }
1562
1563 static ssize_t net_socket_receive_dgram(VLANClientState *vc, const uint8_t *buf, size_t size)
1564 {
1565     NetSocketState *s = vc->opaque;
1566
1567     return sendto(s->fd, (const void *)buf, size, 0,
1568                   (struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst));
1569 }
1570
1571 static void net_socket_send(void *opaque)
1572 {
1573     NetSocketState *s = opaque;
1574     int size, err;
1575     unsigned l;
1576     uint8_t buf1[4096];
1577     const uint8_t *buf;
1578
1579     size = recv(s->fd, (void *)buf1, sizeof(buf1), 0);
1580     if (size < 0) {
1581         err = socket_error();
1582         if (err != EWOULDBLOCK)
1583             goto eoc;
1584     } else if (size == 0) {
1585         /* end of connection */
1586     eoc:
1587         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1588         closesocket(s->fd);
1589         return;
1590     }
1591     buf = buf1;
1592     while (size > 0) {
1593         /* reassemble a packet from the network */
1594         switch(s->state) {
1595         case 0:
1596             l = 4 - s->index;
1597             if (l > size)
1598                 l = size;
1599             memcpy(s->buf + s->index, buf, l);
1600             buf += l;
1601             size -= l;
1602             s->index += l;
1603             if (s->index == 4) {
1604                 /* got length */
1605                 s->packet_len = ntohl(*(uint32_t *)s->buf);
1606                 s->index = 0;
1607                 s->state = 1;
1608             }
1609             break;
1610         case 1:
1611             l = s->packet_len - s->index;
1612             if (l > size)
1613                 l = size;
1614             if (s->index + l <= sizeof(s->buf)) {
1615                 memcpy(s->buf + s->index, buf, l);
1616             } else {
1617                 fprintf(stderr, "serious error: oversized packet received,"
1618                     "connection terminated.\n");
1619                 s->state = 0;
1620                 goto eoc;
1621             }
1622
1623             s->index += l;
1624             buf += l;
1625             size -= l;
1626             if (s->index >= s->packet_len) {
1627                 qemu_send_packet(s->vc, s->buf, s->packet_len);
1628                 s->index = 0;
1629                 s->state = 0;
1630             }
1631             break;
1632         }
1633     }
1634 }
1635
1636 static void net_socket_send_dgram(void *opaque)
1637 {
1638     NetSocketState *s = opaque;
1639     int size;
1640
1641     size = recv(s->fd, (void *)s->buf, sizeof(s->buf), 0);
1642     if (size < 0)
1643         return;
1644     if (size == 0) {
1645         /* end of connection */
1646         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1647         return;
1648     }
1649     qemu_send_packet(s->vc, s->buf, size);
1650 }
1651
1652 static int net_socket_mcast_create(struct sockaddr_in *mcastaddr)
1653 {
1654     struct ip_mreq imr;
1655     int fd;
1656     int val, ret;
1657     if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
1658         fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n",
1659                 inet_ntoa(mcastaddr->sin_addr),
1660                 (int)ntohl(mcastaddr->sin_addr.s_addr));
1661         return -1;
1662
1663     }
1664     fd = socket(PF_INET, SOCK_DGRAM, 0);
1665     if (fd < 0) {
1666         perror("socket(PF_INET, SOCK_DGRAM)");
1667         return -1;
1668     }
1669
1670     val = 1;
1671     ret=setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
1672                    (const char *)&val, sizeof(val));
1673     if (ret < 0) {
1674         perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
1675         goto fail;
1676     }
1677
1678     ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
1679     if (ret < 0) {
1680         perror("bind");
1681         goto fail;
1682     }
1683
1684     /* Add host to multicast group */
1685     imr.imr_multiaddr = mcastaddr->sin_addr;
1686     imr.imr_interface.s_addr = htonl(INADDR_ANY);
1687
1688     ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1689                      (const char *)&imr, sizeof(struct ip_mreq));
1690     if (ret < 0) {
1691         perror("setsockopt(IP_ADD_MEMBERSHIP)");
1692         goto fail;
1693     }
1694
1695     /* Force mcast msgs to loopback (eg. several QEMUs in same host */
1696     val = 1;
1697     ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1698                    (const char *)&val, sizeof(val));
1699     if (ret < 0) {
1700         perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
1701         goto fail;
1702     }
1703
1704     socket_set_nonblock(fd);
1705     return fd;
1706 fail:
1707     if (fd >= 0)
1708         closesocket(fd);
1709     return -1;
1710 }
1711
1712 static void net_socket_cleanup(VLANClientState *vc)
1713 {
1714     NetSocketState *s = vc->opaque;
1715     qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1716     close(s->fd);
1717     qemu_free(s);
1718 }
1719
1720 static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
1721                                                 const char *model,
1722                                                 const char *name,
1723                                                 int fd, int is_connected)
1724 {
1725     struct sockaddr_in saddr;
1726     int newfd;
1727     socklen_t saddr_len;
1728     NetSocketState *s;
1729
1730     /* fd passed: multicast: "learn" dgram_dst address from bound address and save it
1731      * Because this may be "shared" socket from a "master" process, datagrams would be recv()
1732      * by ONLY ONE process: we must "clone" this dgram socket --jjo
1733      */
1734
1735     if (is_connected) {
1736         if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
1737             /* must be bound */
1738             if (saddr.sin_addr.s_addr==0) {
1739                 fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, cannot setup multicast dst addr\n",
1740                         fd);
1741                 return NULL;
1742             }
1743             /* clone dgram socket */
1744             newfd = net_socket_mcast_create(&saddr);
1745             if (newfd < 0) {
1746                 /* error already reported by net_socket_mcast_create() */
1747                 close(fd);
1748                 return NULL;
1749             }
1750             /* clone newfd to fd, close newfd */
1751             dup2(newfd, fd);
1752             close(newfd);
1753
1754         } else {
1755             fprintf(stderr, "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
1756                     fd, strerror(errno));
1757             return NULL;
1758         }
1759     }
1760
1761     s = qemu_mallocz(sizeof(NetSocketState));
1762     s->fd = fd;
1763
1764     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, net_socket_receive_dgram,
1765                                  NULL, net_socket_cleanup, s);
1766     qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s);
1767
1768     /* mcast: save bound address as dst */
1769     if (is_connected) s->dgram_dst=saddr;
1770
1771     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1772             "socket: fd=%d (%s mcast=%s:%d)",
1773             fd, is_connected? "cloned" : "",
1774             inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1775     return s;
1776 }
1777
1778 static void net_socket_connect(void *opaque)
1779 {
1780     NetSocketState *s = opaque;
1781     qemu_set_fd_handler(s->fd, net_socket_send, NULL, s);
1782 }
1783
1784 static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
1785                                                  const char *model,
1786                                                  const char *name,
1787                                                  int fd, int is_connected)
1788 {
1789     NetSocketState *s;
1790     s = qemu_mallocz(sizeof(NetSocketState));
1791     s->fd = fd;
1792     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, net_socket_receive,
1793                                  NULL, net_socket_cleanup, s);
1794     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1795              "socket: fd=%d", fd);
1796     if (is_connected) {
1797         net_socket_connect(s);
1798     } else {
1799         qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
1800     }
1801     return s;
1802 }
1803
1804 static NetSocketState *net_socket_fd_init(VLANState *vlan,
1805                                           const char *model, const char *name,
1806                                           int fd, int is_connected)
1807 {
1808     int so_type=-1, optlen=sizeof(so_type);
1809
1810     if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type,
1811         (socklen_t *)&optlen)< 0) {
1812         fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n", fd);
1813         return NULL;
1814     }
1815     switch(so_type) {
1816     case SOCK_DGRAM:
1817         return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected);
1818     case SOCK_STREAM:
1819         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1820     default:
1821         /* who knows ... this could be a eg. a pty, do warn and continue as stream */
1822         fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
1823         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1824     }
1825     return NULL;
1826 }
1827
1828 static void net_socket_accept(void *opaque)
1829 {
1830     NetSocketListenState *s = opaque;
1831     NetSocketState *s1;
1832     struct sockaddr_in saddr;
1833     socklen_t len;
1834     int fd;
1835
1836     for(;;) {
1837         len = sizeof(saddr);
1838         fd = accept(s->fd, (struct sockaddr *)&saddr, &len);
1839         if (fd < 0 && errno != EINTR) {
1840             return;
1841         } else if (fd >= 0) {
1842             break;
1843         }
1844     }
1845     s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1);
1846     if (!s1) {
1847         closesocket(fd);
1848     } else {
1849         snprintf(s1->vc->info_str, sizeof(s1->vc->info_str),
1850                  "socket: connection from %s:%d",
1851                  inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1852     }
1853 }
1854
1855 static int net_socket_listen_init(VLANState *vlan,
1856                                   const char *model,
1857                                   const char *name,
1858                                   const char *host_str)
1859 {
1860     NetSocketListenState *s;
1861     int fd, val, ret;
1862     struct sockaddr_in saddr;
1863
1864     if (parse_host_port(&saddr, host_str) < 0)
1865         return -1;
1866
1867     s = qemu_mallocz(sizeof(NetSocketListenState));
1868
1869     fd = socket(PF_INET, SOCK_STREAM, 0);
1870     if (fd < 0) {
1871         perror("socket");
1872         return -1;
1873     }
1874     socket_set_nonblock(fd);
1875
1876     /* allow fast reuse */
1877     val = 1;
1878     setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));
1879
1880     ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
1881     if (ret < 0) {
1882         perror("bind");
1883         return -1;
1884     }
1885     ret = listen(fd, 0);
1886     if (ret < 0) {
1887         perror("listen");
1888         return -1;
1889     }
1890     s->vlan = vlan;
1891     s->model = strdup(model);
1892     s->name = name ? strdup(name) : NULL;
1893     s->fd = fd;
1894     qemu_set_fd_handler(fd, net_socket_accept, NULL, s);
1895     return 0;
1896 }
1897
1898 static int net_socket_connect_init(VLANState *vlan,
1899                                    const char *model,
1900                                    const char *name,
1901                                    const char *host_str)
1902 {
1903     NetSocketState *s;
1904     int fd, connected, ret, err;
1905     struct sockaddr_in saddr;
1906
1907     if (parse_host_port(&saddr, host_str) < 0)
1908         return -1;
1909
1910     fd = socket(PF_INET, SOCK_STREAM, 0);
1911     if (fd < 0) {
1912         perror("socket");
1913         return -1;
1914     }
1915     socket_set_nonblock(fd);
1916
1917     connected = 0;
1918     for(;;) {
1919         ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
1920         if (ret < 0) {
1921             err = socket_error();
1922             if (err == EINTR || err == EWOULDBLOCK) {
1923             } else if (err == EINPROGRESS) {
1924                 break;
1925 #ifdef _WIN32
1926             } else if (err == WSAEALREADY) {
1927                 break;
1928 #endif
1929             } else {
1930                 perror("connect");
1931                 closesocket(fd);
1932                 return -1;
1933             }
1934         } else {
1935             connected = 1;
1936             break;
1937         }
1938     }
1939     s = net_socket_fd_init(vlan, model, name, fd, connected);
1940     if (!s)
1941         return -1;
1942     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1943              "socket: connect to %s:%d",
1944              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1945     return 0;
1946 }
1947
1948 static int net_socket_mcast_init(VLANState *vlan,
1949                                  const char *model,
1950                                  const char *name,
1951                                  const char *host_str)
1952 {
1953     NetSocketState *s;
1954     int fd;
1955     struct sockaddr_in saddr;
1956
1957     if (parse_host_port(&saddr, host_str) < 0)
1958         return -1;
1959
1960
1961     fd = net_socket_mcast_create(&saddr);
1962     if (fd < 0)
1963         return -1;
1964
1965     s = net_socket_fd_init(vlan, model, name, fd, 0);
1966     if (!s)
1967         return -1;
1968
1969     s->dgram_dst = saddr;
1970
1971     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1972              "socket: mcast=%s:%d",
1973              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1974     return 0;
1975
1976 }
1977
1978 typedef struct DumpState {
1979     VLANClientState *pcap_vc;
1980     int fd;
1981     int pcap_caplen;
1982 } DumpState;
1983
1984 #define PCAP_MAGIC 0xa1b2c3d4
1985
1986 struct pcap_file_hdr {
1987     uint32_t magic;
1988     uint16_t version_major;
1989     uint16_t version_minor;
1990     int32_t thiszone;
1991     uint32_t sigfigs;
1992     uint32_t snaplen;
1993     uint32_t linktype;
1994 };
1995
1996 struct pcap_sf_pkthdr {
1997     struct {
1998         int32_t tv_sec;
1999         int32_t tv_usec;
2000     } ts;
2001     uint32_t caplen;
2002     uint32_t len;
2003 };
2004
2005 static ssize_t dump_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
2006 {
2007     DumpState *s = vc->opaque;
2008     struct pcap_sf_pkthdr hdr;
2009     int64_t ts;
2010     int caplen;
2011
2012     /* Early return in case of previous error. */
2013     if (s->fd < 0) {
2014         return size;
2015     }
2016
2017     ts = muldiv64(qemu_get_clock(vm_clock), 1000000, ticks_per_sec);
2018     caplen = size > s->pcap_caplen ? s->pcap_caplen : size;
2019
2020     hdr.ts.tv_sec = ts / 1000000;
2021     hdr.ts.tv_usec = ts % 1000000;
2022     hdr.caplen = caplen;
2023     hdr.len = size;
2024     if (write(s->fd, &hdr, sizeof(hdr)) != sizeof(hdr) ||
2025         write(s->fd, buf, caplen) != caplen) {
2026         qemu_log("-net dump write error - stop dump\n");
2027         close(s->fd);
2028         s->fd = -1;
2029     }
2030
2031     return size;
2032 }
2033
2034 static void net_dump_cleanup(VLANClientState *vc)
2035 {
2036     DumpState *s = vc->opaque;
2037
2038     close(s->fd);
2039     qemu_free(s);
2040 }
2041
2042 static int net_dump_init(Monitor *mon, VLANState *vlan, const char *device,
2043                          const char *name, const char *filename, int len)
2044 {
2045     struct pcap_file_hdr hdr;
2046     DumpState *s;
2047
2048     s = qemu_malloc(sizeof(DumpState));
2049
2050     s->fd = open(filename, O_CREAT | O_WRONLY | O_BINARY, 0644);
2051     if (s->fd < 0) {
2052         config_error(mon, "-net dump: can't open %s\n", filename);
2053         return -1;
2054     }
2055
2056     s->pcap_caplen = len;
2057
2058     hdr.magic = PCAP_MAGIC;
2059     hdr.version_major = 2;
2060     hdr.version_minor = 4;
2061     hdr.thiszone = 0;
2062     hdr.sigfigs = 0;
2063     hdr.snaplen = s->pcap_caplen;
2064     hdr.linktype = 1;
2065
2066     if (write(s->fd, &hdr, sizeof(hdr)) < sizeof(hdr)) {
2067         config_error(mon, "-net dump write error: %s\n", strerror(errno));
2068         close(s->fd);
2069         qemu_free(s);
2070         return -1;
2071     }
2072
2073     s->pcap_vc = qemu_new_vlan_client(vlan, device, name, NULL, dump_receive, NULL,
2074                                       net_dump_cleanup, s);
2075     snprintf(s->pcap_vc->info_str, sizeof(s->pcap_vc->info_str),
2076              "dump to %s (len=%d)", filename, len);
2077     return 0;
2078 }
2079
2080 /* find or alloc a new VLAN */
2081 VLANState *qemu_find_vlan(int id)
2082 {
2083     VLANState **pvlan, *vlan;
2084     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2085         if (vlan->id == id)
2086             return vlan;
2087     }
2088     vlan = qemu_mallocz(sizeof(VLANState));
2089     vlan->id = id;
2090     vlan->next = NULL;
2091     pvlan = &first_vlan;
2092     while (*pvlan != NULL)
2093         pvlan = &(*pvlan)->next;
2094     *pvlan = vlan;
2095     return vlan;
2096 }
2097
2098 static int nic_get_free_idx(void)
2099 {
2100     int index;
2101
2102     for (index = 0; index < MAX_NICS; index++)
2103         if (!nd_table[index].used)
2104             return index;
2105     return -1;
2106 }
2107
2108 void qemu_check_nic_model(NICInfo *nd, const char *model)
2109 {
2110     const char *models[2];
2111
2112     models[0] = model;
2113     models[1] = NULL;
2114
2115     qemu_check_nic_model_list(nd, models, model);
2116 }
2117
2118 void qemu_check_nic_model_list(NICInfo *nd, const char * const *models,
2119                                const char *default_model)
2120 {
2121     int i, exit_status = 0;
2122
2123     if (!nd->model)
2124         nd->model = strdup(default_model);
2125
2126     if (strcmp(nd->model, "?") != 0) {
2127         for (i = 0 ; models[i]; i++)
2128             if (strcmp(nd->model, models[i]) == 0)
2129                 return;
2130
2131         fprintf(stderr, "qemu: Unsupported NIC model: %s\n", nd->model);
2132         exit_status = 1;
2133     }
2134
2135     fprintf(stderr, "qemu: Supported NIC models: ");
2136     for (i = 0 ; models[i]; i++)
2137         fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
2138
2139     exit(exit_status);
2140 }
2141
2142 int net_client_init(Monitor *mon, const char *device, const char *p)
2143 {
2144     static const char * const fd_params[] = {
2145         "vlan", "name", "fd", NULL
2146     };
2147     char buf[1024];
2148     int vlan_id, ret;
2149     VLANState *vlan;
2150     char *name = NULL;
2151
2152     vlan_id = 0;
2153     if (get_param_value(buf, sizeof(buf), "vlan", p)) {
2154         vlan_id = strtol(buf, NULL, 0);
2155     }
2156     vlan = qemu_find_vlan(vlan_id);
2157
2158     if (get_param_value(buf, sizeof(buf), "name", p)) {
2159         name = qemu_strdup(buf);
2160     }
2161     if (!strcmp(device, "nic")) {
2162         static const char * const nic_params[] = {
2163             "vlan", "name", "macaddr", "model", "addr", NULL
2164         };
2165         NICInfo *nd;
2166         uint8_t *macaddr;
2167         int idx = nic_get_free_idx();
2168
2169         if (check_params(buf, sizeof(buf), nic_params, p) < 0) {
2170             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2171             ret = -1;
2172             goto out;
2173         }
2174         if (idx == -1 || nb_nics >= MAX_NICS) {
2175             config_error(mon, "Too Many NICs\n");
2176             ret = -1;
2177             goto out;
2178         }
2179         nd = &nd_table[idx];
2180         macaddr = nd->macaddr;
2181         macaddr[0] = 0x52;
2182         macaddr[1] = 0x54;
2183         macaddr[2] = 0x00;
2184         macaddr[3] = 0x12;
2185         macaddr[4] = 0x34;
2186         macaddr[5] = 0x56 + idx;
2187
2188         if (get_param_value(buf, sizeof(buf), "macaddr", p)) {
2189             if (parse_macaddr(macaddr, buf) < 0) {
2190                 config_error(mon, "invalid syntax for ethernet address\n");
2191                 ret = -1;
2192                 goto out;
2193             }
2194         }
2195         if (get_param_value(buf, sizeof(buf), "model", p)) {
2196             nd->model = strdup(buf);
2197         }
2198         if (get_param_value(buf, sizeof(buf), "addr", p)) {
2199             nd->devaddr = strdup(buf);
2200         }
2201         nd->vlan = vlan;
2202         nd->name = name;
2203         nd->used = 1;
2204         name = NULL;
2205         nb_nics++;
2206         vlan->nb_guest_devs++;
2207         ret = idx;
2208     } else
2209     if (!strcmp(device, "none")) {
2210         if (*p != '\0') {
2211             config_error(mon, "'none' takes no parameters\n");
2212             ret = -1;
2213             goto out;
2214         }
2215         /* does nothing. It is needed to signal that no network cards
2216            are wanted */
2217         ret = 0;
2218     } else
2219 #ifdef CONFIG_SLIRP
2220     if (!strcmp(device, "user")) {
2221         static const char * const slirp_params[] = {
2222             "vlan", "name", "hostname", "restrict", "ip", NULL
2223         };
2224         int restricted = 0;
2225         char *ip = NULL;
2226
2227         if (check_params(buf, sizeof(buf), slirp_params, p) < 0) {
2228             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2229             ret = -1;
2230             goto out;
2231         }
2232         if (get_param_value(buf, sizeof(buf), "hostname", p)) {
2233             pstrcpy(slirp_hostname, sizeof(slirp_hostname), buf);
2234         }
2235         if (get_param_value(buf, sizeof(buf), "restrict", p)) {
2236             restricted = (buf[0] == 'y') ? 1 : 0;
2237         }
2238         if (get_param_value(buf, sizeof(buf), "ip", p)) {
2239             ip = qemu_strdup(buf);
2240         }
2241         vlan->nb_host_devs++;
2242         ret = net_slirp_init(vlan, device, name, restricted, ip);
2243         qemu_free(ip);
2244     } else if (!strcmp(device, "channel")) {
2245         long port;
2246         char name[20], *devname;
2247         struct VMChannel *vmc;
2248
2249         port = strtol(p, &devname, 10);
2250         devname++;
2251         if (port < 1 || port > 65535) {
2252             config_error(mon, "vmchannel wrong port number\n");
2253             ret = -1;
2254             goto out;
2255         }
2256         vmc = malloc(sizeof(struct VMChannel));
2257         snprintf(name, 20, "vmchannel%ld", port);
2258         vmc->hd = qemu_chr_open(name, devname, NULL);
2259         if (!vmc->hd) {
2260             config_error(mon, "could not open vmchannel device '%s'\n",
2261                          devname);
2262             ret = -1;
2263             goto out;
2264         }
2265         vmc->port = port;
2266         slirp_add_exec(3, vmc->hd, 4, port);
2267         qemu_chr_add_handlers(vmc->hd, vmchannel_can_read, vmchannel_read,
2268                 NULL, vmc);
2269         ret = 0;
2270     } else
2271 #endif
2272 #ifdef _WIN32
2273     if (!strcmp(device, "tap")) {
2274         static const char * const tap_params[] = {
2275             "vlan", "name", "ifname", NULL
2276         };
2277         char ifname[64];
2278
2279         if (check_params(buf, sizeof(buf), tap_params, p) < 0) {
2280             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2281             ret = -1;
2282             goto out;
2283         }
2284         if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
2285             config_error(mon, "tap: no interface name\n");
2286             ret = -1;
2287             goto out;
2288         }
2289         vlan->nb_host_devs++;
2290         ret = tap_win32_init(vlan, device, name, ifname);
2291     } else
2292 #elif defined (_AIX)
2293 #else
2294     if (!strcmp(device, "tap")) {
2295         char ifname[64], chkbuf[64];
2296         char setup_script[1024], down_script[1024];
2297         int fd;
2298         vlan->nb_host_devs++;
2299         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
2300             if (check_params(chkbuf, sizeof(chkbuf), fd_params, p) < 0) {
2301                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2302                 ret = -1;
2303                 goto out;
2304             }
2305             fd = strtol(buf, NULL, 0);
2306             fcntl(fd, F_SETFL, O_NONBLOCK);
2307             net_tap_fd_init(vlan, device, name, fd);
2308             ret = 0;
2309         } else {
2310             static const char * const tap_params[] = {
2311                 "vlan", "name", "ifname", "script", "downscript", NULL
2312             };
2313             if (check_params(chkbuf, sizeof(chkbuf), tap_params, p) < 0) {
2314                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2315                 ret = -1;
2316                 goto out;
2317             }
2318             if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
2319                 ifname[0] = '\0';
2320             }
2321             if (get_param_value(setup_script, sizeof(setup_script), "script", p) == 0) {
2322                 pstrcpy(setup_script, sizeof(setup_script), DEFAULT_NETWORK_SCRIPT);
2323             }
2324             if (get_param_value(down_script, sizeof(down_script), "downscript", p) == 0) {
2325                 pstrcpy(down_script, sizeof(down_script), DEFAULT_NETWORK_DOWN_SCRIPT);
2326             }
2327             ret = net_tap_init(vlan, device, name, ifname, setup_script, down_script);
2328         }
2329     } else
2330 #endif
2331     if (!strcmp(device, "socket")) {
2332         char chkbuf[64];
2333         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
2334             int fd;
2335             if (check_params(chkbuf, sizeof(chkbuf), fd_params, p) < 0) {
2336                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2337                 ret = -1;
2338                 goto out;
2339             }
2340             fd = strtol(buf, NULL, 0);
2341             ret = -1;
2342             if (net_socket_fd_init(vlan, device, name, fd, 1))
2343                 ret = 0;
2344         } else if (get_param_value(buf, sizeof(buf), "listen", p) > 0) {
2345             static const char * const listen_params[] = {
2346                 "vlan", "name", "listen", NULL
2347             };
2348             if (check_params(chkbuf, sizeof(chkbuf), listen_params, p) < 0) {
2349                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2350                 ret = -1;
2351                 goto out;
2352             }
2353             ret = net_socket_listen_init(vlan, device, name, buf);
2354         } else if (get_param_value(buf, sizeof(buf), "connect", p) > 0) {
2355             static const char * const connect_params[] = {
2356                 "vlan", "name", "connect", NULL
2357             };
2358             if (check_params(chkbuf, sizeof(chkbuf), connect_params, p) < 0) {
2359                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2360                 ret = -1;
2361                 goto out;
2362             }
2363             ret = net_socket_connect_init(vlan, device, name, buf);
2364         } else if (get_param_value(buf, sizeof(buf), "mcast", p) > 0) {
2365             static const char * const mcast_params[] = {
2366                 "vlan", "name", "mcast", NULL
2367             };
2368             if (check_params(chkbuf, sizeof(chkbuf), mcast_params, p) < 0) {
2369                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2370                 ret = -1;
2371                 goto out;
2372             }
2373             ret = net_socket_mcast_init(vlan, device, name, buf);
2374         } else {
2375             config_error(mon, "Unknown socket options: %s\n", p);
2376             ret = -1;
2377             goto out;
2378         }
2379         vlan->nb_host_devs++;
2380     } else
2381 #ifdef CONFIG_VDE
2382     if (!strcmp(device, "vde")) {
2383         static const char * const vde_params[] = {
2384             "vlan", "name", "sock", "port", "group", "mode", NULL
2385         };
2386         char vde_sock[1024], vde_group[512];
2387         int vde_port, vde_mode;
2388
2389         if (check_params(buf, sizeof(buf), vde_params, p) < 0) {
2390             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2391             ret = -1;
2392             goto out;
2393         }
2394         vlan->nb_host_devs++;
2395         if (get_param_value(vde_sock, sizeof(vde_sock), "sock", p) <= 0) {
2396             vde_sock[0] = '\0';
2397         }
2398         if (get_param_value(buf, sizeof(buf), "port", p) > 0) {
2399             vde_port = strtol(buf, NULL, 10);
2400         } else {
2401             vde_port = 0;
2402         }
2403         if (get_param_value(vde_group, sizeof(vde_group), "group", p) <= 0) {
2404             vde_group[0] = '\0';
2405         }
2406         if (get_param_value(buf, sizeof(buf), "mode", p) > 0) {
2407             vde_mode = strtol(buf, NULL, 8);
2408         } else {
2409             vde_mode = 0700;
2410         }
2411         ret = net_vde_init(vlan, device, name, vde_sock, vde_port, vde_group, vde_mode);
2412     } else
2413 #endif
2414     if (!strcmp(device, "dump")) {
2415         int len = 65536;
2416
2417         if (get_param_value(buf, sizeof(buf), "len", p) > 0) {
2418             len = strtol(buf, NULL, 0);
2419         }
2420         if (!get_param_value(buf, sizeof(buf), "file", p)) {
2421             snprintf(buf, sizeof(buf), "qemu-vlan%d.pcap", vlan_id);
2422         }
2423         ret = net_dump_init(mon, vlan, device, name, buf, len);
2424     } else {
2425         config_error(mon, "Unknown network device: %s\n", device);
2426         ret = -1;
2427         goto out;
2428     }
2429     if (ret < 0) {
2430         config_error(mon, "Could not initialize device '%s'\n", device);
2431     }
2432 out:
2433     qemu_free(name);
2434     return ret;
2435 }
2436
2437 void net_client_uninit(NICInfo *nd)
2438 {
2439     nd->vlan->nb_guest_devs--;
2440     nb_nics--;
2441     nd->used = 0;
2442     free((void *)nd->model);
2443 }
2444
2445 static int net_host_check_device(const char *device)
2446 {
2447     int i;
2448     const char *valid_param_list[] = { "tap", "socket", "dump"
2449 #ifdef CONFIG_SLIRP
2450                                        ,"user"
2451 #endif
2452 #ifdef CONFIG_VDE
2453                                        ,"vde"
2454 #endif
2455     };
2456     for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) {
2457         if (!strncmp(valid_param_list[i], device,
2458                      strlen(valid_param_list[i])))
2459             return 1;
2460     }
2461
2462     return 0;
2463 }
2464
2465 void net_host_device_add(Monitor *mon, const char *device, const char *opts)
2466 {
2467     if (!net_host_check_device(device)) {
2468         monitor_printf(mon, "invalid host network device %s\n", device);
2469         return;
2470     }
2471     if (net_client_init(mon, device, opts ? opts : "") < 0) {
2472         monitor_printf(mon, "adding host network device %s failed\n", device);
2473     }
2474 }
2475
2476 void net_host_device_remove(Monitor *mon, int vlan_id, const char *device)
2477 {
2478     VLANState *vlan;
2479     VLANClientState *vc;
2480
2481     vlan = qemu_find_vlan(vlan_id);
2482
2483     for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
2484         if (!strcmp(vc->name, device)) {
2485             break;
2486         }
2487     }
2488
2489     if (!vc) {
2490         monitor_printf(mon, "can't find device %s\n", device);
2491         return;
2492     }
2493     if (!net_host_check_device(vc->model)) {
2494         monitor_printf(mon, "invalid host network device %s\n", device);
2495         return;
2496     }
2497     qemu_del_vlan_client(vc);
2498 }
2499
2500 int net_client_parse(const char *str)
2501 {
2502     const char *p;
2503     char *q;
2504     char device[64];
2505
2506     p = str;
2507     q = device;
2508     while (*p != '\0' && *p != ',') {
2509         if ((q - device) < sizeof(device) - 1)
2510             *q++ = *p;
2511         p++;
2512     }
2513     *q = '\0';
2514     if (*p == ',')
2515         p++;
2516
2517     return net_client_init(NULL, device, p);
2518 }
2519
2520 void net_set_boot_mask(int net_boot_mask)
2521 {
2522     int i;
2523
2524     /* Only the first four NICs may be bootable */
2525     net_boot_mask = net_boot_mask & 0xF;
2526
2527     for (i = 0; i < nb_nics; i++) {
2528         if (net_boot_mask & (1 << i)) {
2529             nd_table[i].bootable = 1;
2530             net_boot_mask &= ~(1 << i);
2531         }
2532     }
2533
2534     if (net_boot_mask) {
2535         fprintf(stderr, "Cannot boot from non-existent NIC\n");
2536         exit(1);
2537     }
2538 }
2539
2540 void do_info_network(Monitor *mon)
2541 {
2542     VLANState *vlan;
2543     VLANClientState *vc;
2544
2545     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2546         monitor_printf(mon, "VLAN %d devices:\n", vlan->id);
2547         for(vc = vlan->first_client; vc != NULL; vc = vc->next)
2548             monitor_printf(mon, "  %s: %s\n", vc->name, vc->info_str);
2549     }
2550 }
2551
2552 int do_set_link(Monitor *mon, const char *name, const char *up_or_down)
2553 {
2554     VLANState *vlan;
2555     VLANClientState *vc = NULL;
2556
2557     for (vlan = first_vlan; vlan != NULL; vlan = vlan->next)
2558         for (vc = vlan->first_client; vc != NULL; vc = vc->next)
2559             if (strcmp(vc->name, name) == 0)
2560                 goto done;
2561 done:
2562
2563     if (!vc) {
2564         monitor_printf(mon, "could not find network device '%s'", name);
2565         return 0;
2566     }
2567
2568     if (strcmp(up_or_down, "up") == 0)
2569         vc->link_down = 0;
2570     else if (strcmp(up_or_down, "down") == 0)
2571         vc->link_down = 1;
2572     else
2573         monitor_printf(mon, "invalid link status '%s'; only 'up' or 'down' "
2574                        "valid\n", up_or_down);
2575
2576     if (vc->link_status_changed)
2577         vc->link_status_changed(vc);
2578
2579     return 1;
2580 }
2581
2582 void net_cleanup(void)
2583 {
2584     VLANState *vlan;
2585
2586     /* close network clients */
2587     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2588         VLANClientState *vc = vlan->first_client;
2589
2590         while (vc) {
2591             VLANClientState *next = vc->next;
2592
2593             qemu_del_vlan_client(vc);
2594
2595             vc = next;
2596         }
2597     }
2598 }
2599
2600 void net_client_check(void)
2601 {
2602     VLANState *vlan;
2603
2604     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2605         if (vlan->nb_guest_devs == 0 && vlan->nb_host_devs == 0)
2606             continue;
2607         if (vlan->nb_guest_devs == 0)
2608             fprintf(stderr, "Warning: vlan %d with no nics\n", vlan->id);
2609         if (vlan->nb_host_devs == 0)
2610             fprintf(stderr,
2611                     "Warning: vlan %d is not connected to host network\n",
2612                     vlan->id);
2613     }
2614 }