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_flush_queued_packets(VLANClientState *vc)
 443 {
 444     VLANPacket *packet;
 445
 446     while ((packet = vc->vlan->send_queue) != NULL) {
 447         int ret;
 448
 449         vc->vlan->send_queue = packet->next;
 450
 451         ret = qemu_deliver_packet(packet->sender, packet->data, packet->size);
 452         if (ret == 0 && packet->sent_cb != NULL) {
 453             packet->next = vc->vlan->send_queue;
 454             vc->vlan->send_queue = packet;
 455             break;
 456         }
 457
 458         if (packet->sent_cb)
 459             packet->sent_cb(packet->sender);
 460
 461         qemu_free(packet);
 462     }
 463 }
 464
 465 static void qemu_enqueue_packet(VLANClientState *sender,
 466                                 const uint8_t *buf, int size,
 467                                 NetPacketSent *sent_cb)
 468 {
 469     VLANPacket *packet;
 470
 471     packet = qemu_malloc(sizeof(VLANPacket) + size);
 472     packet->next = sender->vlan->send_queue;
 473     packet->sender = sender;
 474     packet->size = size;
 475     packet->sent_cb = sent_cb;
 476     memcpy(packet->data, buf, size);
 477     sender->vlan->send_queue = packet;
 478 }
 479
 480 ssize_t qemu_send_packet_async(VLANClientState *sender,
 481                                const uint8_t *buf, int size,
 482                                NetPacketSent *sent_cb)
 483 {
 484     int ret;
 485
 486     if (sender->link_down) {
 487         return size;
 488     }
 489
 490 #ifdef DEBUG_NET
 491     printf("vlan %d send:\n", sender->vlan->id);
 492     hex_dump(stdout, buf, size);
 493 #endif
 494
 495     if (sender->vlan->delivering) {
 496         qemu_enqueue_packet(sender, buf, size, NULL);
 497         return size;
 498     }
 499
 500     ret = qemu_deliver_packet(sender, buf, size);
 501     if (ret == 0 && sent_cb != NULL) {
 502         qemu_enqueue_packet(sender, buf, size, sent_cb);
 503         return 0;
 504     }
 505
 506     qemu_flush_queued_packets(sender);
 507
 508     return ret;
 509 }
 510
 511 void qemu_send_packet(VLANClientState *vc, const uint8_t *buf, int size)
 512 {
 513     qemu_send_packet_async(vc, buf, size, NULL);
 514 }
 515
 516 static ssize_t vc_sendv_compat(VLANClientState *vc, const struct iovec *iov,
 517                                int iovcnt)
 518 {
 519     uint8_t buffer[4096];
 520     size_t offset = 0;
 521     int i;
 522
 523     for (i = 0; i < iovcnt; i++) {
 524         size_t len;
 525
 526         len = MIN(sizeof(buffer) - offset, iov[i].iov_len);
 527         memcpy(buffer + offset, iov[i].iov_base, len);
 528         offset += len;
 529     }
 530
 531     return vc->receive(vc, buffer, offset);
 532 }
 533
 534 static ssize_t calc_iov_length(const struct iovec *iov, int iovcnt)
 535 {
 536     size_t offset = 0;
 537     int i;
 538
 539     for (i = 0; i < iovcnt; i++)
 540         offset += iov[i].iov_len;
 541     return offset;
 542 }
 543
 544 static int qemu_deliver_packet_iov(VLANClientState *sender,
 545                                    const struct iovec *iov, int iovcnt)
 546 {
 547     VLANClientState *vc;
 548     int ret = -1;
 549
 550     sender->vlan->delivering = 1;
 551
 552     for (vc = sender->vlan->first_client; vc != NULL; vc = vc->next) {
 553         ssize_t len;
 554
 555         if (vc == sender) {
 556             continue;
 557         }
 558
 559         if (vc->link_down) {
 560             ret = calc_iov_length(iov, iovcnt);
 561             continue;
 562         }
 563
 564         if (vc->receive_iov) {
 565             len = vc->receive_iov(vc, iov, iovcnt);
 566         } else {
 567             len = vc_sendv_compat(vc, iov, iovcnt);
 568         }
 569
 570         ret = (ret >= 0) ? ret : len;
 571     }
 572
 573     sender->vlan->delivering = 0;
 574
 575     return ret;
 576 }
 577
 578 static ssize_t qemu_enqueue_packet_iov(VLANClientState *sender,
 579                                        const struct iovec *iov, int iovcnt,
 580                                        NetPacketSent *sent_cb)
 581 {
 582     VLANPacket *packet;
 583     size_t max_len = 0;
 584     int i;
 585
 586     max_len = calc_iov_length(iov, iovcnt);
 587
 588     packet = qemu_malloc(sizeof(VLANPacket) + max_len);
 589     packet->next = sender->vlan->send_queue;
 590     packet->sender = sender;
 591     packet->sent_cb = sent_cb;
 592     packet->size = 0;
 593
 594     for (i = 0; i < iovcnt; i++) {
 595         size_t len = iov[i].iov_len;
 596
 597         memcpy(packet->data + packet->size, iov[i].iov_base, len);
 598         packet->size += len;
 599     }
 600
 601     sender->vlan->send_queue = packet;
 602
 603     return packet->size;
 604 }
 605
 606 ssize_t qemu_sendv_packet_async(VLANClientState *sender,
 607                                 const struct iovec *iov, int iovcnt,
 608                                 NetPacketSent *sent_cb)
 609 {
 610     int ret;
 611
 612     if (sender->link_down) {
 613         return calc_iov_length(iov, iovcnt);
 614     }
 615
 616     if (sender->vlan->delivering) {
 617         return qemu_enqueue_packet_iov(sender, iov, iovcnt, NULL);
 618     }
 619
 620     ret = qemu_deliver_packet_iov(sender, iov, iovcnt);
 621     if (ret == 0 && sent_cb != NULL) {
 622         qemu_enqueue_packet_iov(sender, iov, iovcnt, sent_cb);
 623         return 0;
 624     }
 625
 626     qemu_flush_queued_packets(sender);
 627
 628     return ret;
 629 }
 630
 631 ssize_t
 632 qemu_sendv_packet(VLANClientState *vc, const struct iovec *iov, int iovcnt)
 633 {
 634     return qemu_sendv_packet_async(vc, iov, iovcnt, NULL);
 635 }
 636
 637 static void config_error(Monitor *mon, const char *fmt, ...)
 638 {
 639     va_list ap;
 640
 641     va_start(ap, fmt);
 642     if (mon) {
 643         monitor_vprintf(mon, fmt, ap);
 644     } else {
 645         fprintf(stderr, "qemu: ");
 646         vfprintf(stderr, fmt, ap);
 647         exit(1);
 648     }
 649     va_end(ap);
 650 }
 651
 652 #if defined(CONFIG_SLIRP)
 653
 654 /* slirp network adapter */
 655
 656 struct slirp_config_str {
 657     struct slirp_config_str *next;
 658     const char *str;
 659 };
 660
 661 static int slirp_inited;
 662 static struct slirp_config_str *slirp_redirs;
 663 #ifndef _WIN32
 664 static const char *slirp_smb_export;
 665 #endif
 666 static VLANClientState *slirp_vc;
 667
 668 #ifndef _WIN32
 669 static void slirp_smb(const char *exported_dir);
 670 #endif
 671 static void slirp_redirection(Monitor *mon, const char *redir_str);
 672
 673 int slirp_can_output(void)
 674 {
 675     return !slirp_vc || qemu_can_send_packet(slirp_vc);
 676 }
 677
 678 void slirp_output(const uint8_t *pkt, int pkt_len)
 679 {
 680 #ifdef DEBUG_SLIRP
 681     printf("slirp output:\n");
 682     hex_dump(stdout, pkt, pkt_len);
 683 #endif
 684     if (!slirp_vc)
 685         return;
 686     qemu_send_packet(slirp_vc, pkt, pkt_len);
 687 }
 688
 689 int slirp_is_inited(void)
 690 {
 691     return slirp_inited;
 692 }
 693
 694 static ssize_t slirp_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
 695 {
 696 #ifdef DEBUG_SLIRP
 697     printf("slirp input:\n");
 698     hex_dump(stdout, buf, size);
 699 #endif
 700     slirp_input(buf, size);
 701     return size;
 702 }
 703
 704 static int slirp_in_use;
 705
 706 static void net_slirp_cleanup(VLANClientState *vc)
 707 {
 708     slirp_in_use = 0;
 709 }
 710
 711 static int net_slirp_init(VLANState *vlan, const char *model, const char *name,
 712                           int restricted, const char *ip)
 713 {
 714     if (slirp_in_use) {
 715         /* slirp only supports a single instance so far */
 716         return -1;
 717     }
 718     if (!slirp_inited) {
 719         slirp_inited = 1;
 720         slirp_init(restricted, ip);
 721
 722         while (slirp_redirs) {
 723             struct slirp_config_str *config = slirp_redirs;
 724
 725             slirp_redirection(NULL, config->str);
 726             slirp_redirs = config->next;
 727             qemu_free(config);
 728         }
 729 #ifndef _WIN32
 730         if (slirp_smb_export) {
 731             slirp_smb(slirp_smb_export);
 732         }
 733 #endif
 734     }
 735
 736     slirp_vc = qemu_new_vlan_client(vlan, model, name, NULL, slirp_receive,
 737                                     NULL, net_slirp_cleanup, NULL);
 738     slirp_vc->info_str[0] = '\0';
 739     slirp_in_use = 1;
 740     return 0;
 741 }
 742
 743 static void net_slirp_redir_print(void *opaque, int is_udp,
 744                                   struct in_addr *laddr, u_int lport,
 745                                   struct in_addr *faddr, u_int fport)
 746 {
 747     Monitor *mon = (Monitor *)opaque;
 748     uint32_t h_addr;
 749     uint32_t g_addr;
 750     char buf[16];
 751
 752     h_addr = ntohl(faddr->s_addr);
 753     g_addr = ntohl(laddr->s_addr);
 754
 755     monitor_printf(mon, "  %s |", is_udp ? "udp" : "tcp" );
 756     snprintf(buf, 15, "%d.%d.%d.%d", (h_addr >> 24) & 0xff,
 757                                      (h_addr >> 16) & 0xff,
 758                                      (h_addr >> 8) & 0xff,
 759                                      (h_addr) & 0xff);
 760     monitor_printf(mon, " %15s |", buf);
 761     monitor_printf(mon, " %5d |", fport);
 762
 763     snprintf(buf, 15, "%d.%d.%d.%d", (g_addr >> 24) & 0xff,
 764                                      (g_addr >> 16) & 0xff,
 765                                      (g_addr >> 8) & 0xff,
 766                                      (g_addr) & 0xff);
 767     monitor_printf(mon, " %15s |", buf);
 768     monitor_printf(mon, " %5d\n", lport);
 769
 770 }
 771
 772 static void net_slirp_redir_list(Monitor *mon)
 773 {
 774     if (!mon)
 775         return;
 776
 777     monitor_printf(mon, " Prot |    Host Addr    | HPort |    Guest Addr   | GPort\n");
 778     monitor_printf(mon, "      |                 |       |                 |      \n");
 779     slirp_redir_loop(net_slirp_redir_print, mon);
 780 }
 781
 782 static void net_slirp_redir_rm(Monitor *mon, const char *port_str)
 783 {
 784     int host_port;
 785     char buf[256] = "";
 786     const char *p = port_str;
 787     int is_udp = 0;
 788     int n;
 789
 790     if (!mon)
 791         return;
 792
 793     if (!port_str || !port_str[0])
 794         goto fail_syntax;
 795
 796     get_str_sep(buf, sizeof(buf), &p, ':');
 797
 798     if (!strcmp(buf, "tcp") || buf[0] == '\0') {
 799         is_udp = 0;
 800     } else if (!strcmp(buf, "udp")) {
 801         is_udp = 1;
 802     } else {
 803         goto fail_syntax;
 804     }
 805
 806     host_port = atoi(p);
 807
 808     n = slirp_redir_rm(is_udp, host_port);
 809
 810     monitor_printf(mon, "removed %d redirections to %s port %d\n", n,
 811                         is_udp ? "udp" : "tcp", host_port);
 812     return;
 813
 814  fail_syntax:
 815     monitor_printf(mon, "invalid format\n");
 816 }
 817
 818 static void slirp_redirection(Monitor *mon, const char *redir_str)
 819 {
 820     struct in_addr guest_addr;
 821     int host_port, guest_port;
 822     const char *p;
 823     char buf[256], *r;
 824     int is_udp;
 825
 826     p = redir_str;
 827     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 828         goto fail_syntax;
 829     }
 830     if (!strcmp(buf, "tcp") || buf[0] == '\0') {
 831         is_udp = 0;
 832     } else if (!strcmp(buf, "udp")) {
 833         is_udp = 1;
 834     } else {
 835         goto fail_syntax;
 836     }
 837
 838     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 839         goto fail_syntax;
 840     }
 841     host_port = strtol(buf, &r, 0);
 842     if (r == buf) {
 843         goto fail_syntax;
 844     }
 845
 846     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 847         goto fail_syntax;
 848     }
 849     if (buf[0] == '\0') {
 850         pstrcpy(buf, sizeof(buf), "10.0.2.15");
 851     }
 852     if (!inet_aton(buf, &guest_addr)) {
 853         goto fail_syntax;
 854     }
 855
 856     guest_port = strtol(p, &r, 0);
 857     if (r == p) {
 858         goto fail_syntax;
 859     }
 860
 861     if (slirp_redir(is_udp, host_port, guest_addr, guest_port) < 0) {
 862         config_error(mon, "could not set up redirection '%s'\n", redir_str);
 863     }
 864     return;
 865
 866  fail_syntax:
 867     config_error(mon, "invalid redirection format '%s'\n", redir_str);
 868 }
 869
 870 void net_slirp_redir(Monitor *mon, const char *redir_str, const char *redir_opt2)
 871 {
 872     struct slirp_config_str *config;
 873
 874     if (!slirp_inited) {
 875         if (mon) {
 876             monitor_printf(mon, "user mode network stack not in use\n");
 877         } else {
 878             config = qemu_malloc(sizeof(*config));
 879             config->str = redir_str;
 880             config->next = slirp_redirs;
 881             slirp_redirs = config;
 882         }
 883         return;
 884     }
 885
 886     if (!strcmp(redir_str, "remove")) {
 887         net_slirp_redir_rm(mon, redir_opt2);
 888         return;
 889     }
 890
 891     if (!strcmp(redir_str, "list")) {
 892         net_slirp_redir_list(mon);
 893         return;
 894     }
 895
 896     slirp_redirection(mon, redir_str);
 897 }
 898
 899 #ifndef _WIN32
 900
 901 static char smb_dir[1024];
 902
 903 static void erase_dir(char *dir_name)
 904 {
 905     DIR *d;
 906     struct dirent *de;
 907     char filename[1024];
 908
 909     /* erase all the files in the directory */
 910     if ((d = opendir(dir_name)) != NULL) {
 911         for(;;) {
 912             de = readdir(d);
 913             if (!de)
 914                 break;
 915             if (strcmp(de->d_name, ".") != 0 &&
 916                 strcmp(de->d_name, "..") != 0) {
 917                 snprintf(filename, sizeof(filename), "%s/%s",
 918                          smb_dir, de->d_name);
 919                 if (unlink(filename) != 0)  /* is it a directory? */
 920                     erase_dir(filename);
 921             }
 922         }
 923         closedir(d);
 924         rmdir(dir_name);
 925     }
 926 }
 927
 928 /* automatic user mode samba server configuration */
 929 static void smb_exit(void)
 930 {
 931     erase_dir(smb_dir);
 932 }
 933
 934 static void slirp_smb(const char *exported_dir)
 935 {
 936     char smb_conf[1024];
 937     char smb_cmdline[1024];
 938     FILE *f;
 939
 940     /* XXX: better tmp dir construction */
 941     snprintf(smb_dir, sizeof(smb_dir), "/tmp/qemu-smb.%ld", (long)getpid());
 942     if (mkdir(smb_dir, 0700) < 0) {
 943         fprintf(stderr, "qemu: could not create samba server dir '%s'\n", smb_dir);
 944         exit(1);
 945     }
 946     snprintf(smb_conf, sizeof(smb_conf), "%s/%s", smb_dir, "smb.conf");
 947
 948     f = fopen(smb_conf, "w");
 949     if (!f) {
 950         fprintf(stderr, "qemu: could not create samba server configuration file '%s'\n", smb_conf);
 951         exit(1);
 952     }
 953     fprintf(f,
 954             "[global]\n"
 955             "private dir=%s\n"
 956             "smb ports=0\n"
 957             "socket address=127.0.0.1\n"
 958             "pid directory=%s\n"
 959             "lock directory=%s\n"
 960             "log file=%s/log.smbd\n"
 961             "smb passwd file=%s/smbpasswd\n"
 962             "security = share\n"
 963             "[qemu]\n"
 964             "path=%s\n"
 965             "read only=no\n"
 966             "guest ok=yes\n",
 967             smb_dir,
 968             smb_dir,
 969             smb_dir,
 970             smb_dir,
 971             smb_dir,
 972             exported_dir
 973             );
 974     fclose(f);
 975     atexit(smb_exit);
 976
 977     snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -s %s",
 978              SMBD_COMMAND, smb_conf);
 979
 980     slirp_add_exec(0, smb_cmdline, 4, 139);
 981 }
 982
 983 /* automatic user mode samba server configuration */
 984 void net_slirp_smb(const char *exported_dir)
 985 {
 986     if (slirp_smb_export) {
 987         fprintf(stderr, "-smb given twice\n");
 988         exit(1);
 989     }
 990     slirp_smb_export = exported_dir;
 991     if (slirp_inited) {
 992         slirp_smb(exported_dir);
 993     }
 994 }
 995
 996 #endif /* !defined(_WIN32) */
 997
 998 void do_info_slirp(Monitor *mon)
 999 {
1000     slirp_stats();
1001 }
1002
1003 struct VMChannel {
1004     CharDriverState *hd;
1005     int port;
1006 };
1007
1008 static int vmchannel_can_read(void *opaque)
1009 {
1010     struct VMChannel *vmc = (struct VMChannel*)opaque;
1011     return slirp_socket_can_recv(4, vmc->port);
1012 }
1013
1014 static void vmchannel_read(void *opaque, const uint8_t *buf, int size)
1015 {
1016     struct VMChannel *vmc = (struct VMChannel*)opaque;
1017     slirp_socket_recv(4, vmc->port, buf, size);
1018 }
1019
1020 #endif /* CONFIG_SLIRP */
1021
1022 #if !defined(_WIN32)
1023
1024 typedef struct TAPState {
1025     VLANClientState *vc;
1026     int fd;
1027     char down_script[1024];
1028     char down_script_arg[128];
1029     uint8_t buf[4096];
1030 } TAPState;
1031
1032 static int launch_script(const char *setup_script, const char *ifname, int fd);
1033
1034 static ssize_t tap_receive_iov(VLANClientState *vc, const struct iovec *iov,
1035                                int iovcnt)
1036 {
1037     TAPState *s = vc->opaque;
1038     ssize_t len;
1039
1040     do {
1041         len = writev(s->fd, iov, iovcnt);
1042     } while (len == -1 && (errno == EINTR || errno == EAGAIN));
1043
1044     return len;
1045 }
1046
1047 static ssize_t tap_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1048 {
1049     TAPState *s = vc->opaque;
1050     ssize_t len;
1051
1052     do {
1053         len = write(s->fd, buf, size);
1054     } while (len == -1 && (errno == EINTR || errno == EAGAIN));
1055
1056     return len;
1057 }
1058
1059 static int tap_can_send(void *opaque)
1060 {
1061     TAPState *s = opaque;
1062
1063     return qemu_can_send_packet(s->vc);
1064 }
1065
1066 #ifdef __sun__
1067 static ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
1068 {
1069     struct strbuf sbuf;
1070     int f = 0;
1071
1072     sbuf.maxlen = maxlen;
1073     sbuf.buf = (char *)buf;
1074
1075     return getmsg(tapfd, NULL, &sbuf, &f) >= 0 ? sbuf.len : -1;
1076 }
1077 #else
1078 static ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
1079 {
1080     return read(tapfd, buf, maxlen);
1081 }
1082 #endif
1083
1084 static void tap_send(void *opaque);
1085
1086 static void tap_send_completed(VLANClientState *vc)
1087 {
1088     TAPState *s = vc->opaque;
1089
1090     qemu_set_fd_handler2(s->fd, tap_can_send, tap_send, NULL, s);
1091 }
1092
1093 static void tap_send(void *opaque)
1094 {
1095     TAPState *s = opaque;
1096     int size;
1097
1098     do {
1099         size = tap_read_packet(s->fd, s->buf, sizeof(s->buf));
1100         if (size <= 0) {
1101             break;
1102         }
1103
1104         size = qemu_send_packet_async(s->vc, s->buf, size, tap_send_completed);
1105         if (size == 0) {
1106             qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
1107         }
1108     } while (size > 0);
1109 }
1110
1111 static void tap_cleanup(VLANClientState *vc)
1112 {
1113     TAPState *s = vc->opaque;
1114
1115     if (s->down_script[0])
1116         launch_script(s->down_script, s->down_script_arg, s->fd);
1117
1118     qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1119     close(s->fd);
1120     qemu_free(s);
1121 }
1122
1123 /* fd support */
1124
1125 static TAPState *net_tap_fd_init(VLANState *vlan,
1126                                  const char *model,
1127                                  const char *name,
1128                                  int fd)
1129 {
1130     TAPState *s;
1131
1132     s = qemu_mallocz(sizeof(TAPState));
1133     s->fd = fd;
1134     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, tap_receive,
1135                                  tap_receive_iov, tap_cleanup, s);
1136     qemu_set_fd_handler2(s->fd, tap_can_send, tap_send, NULL, s);
1137     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "fd=%d", fd);
1138     return s;
1139 }
1140
1141 #if defined (HOST_BSD) || defined (__FreeBSD_kernel__)
1142 static int tap_open(char *ifname, int ifname_size)
1143 {
1144     int fd;
1145     char *dev;
1146     struct stat s;
1147
1148     TFR(fd = open("/dev/tap", O_RDWR));
1149     if (fd < 0) {
1150         fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n");
1151         return -1;
1152     }
1153
1154     fstat(fd, &s);
1155     dev = devname(s.st_rdev, S_IFCHR);
1156     pstrcpy(ifname, ifname_size, dev);
1157
1158     fcntl(fd, F_SETFL, O_NONBLOCK);
1159     return fd;
1160 }
1161 #elif defined(__sun__)
1162 #define TUNNEWPPA       (('T'<<16) | 0x0001)
1163 /*
1164  * Allocate TAP device, returns opened fd.
1165  * Stores dev name in the first arg(must be large enough).
1166  */
1167 static int tap_alloc(char *dev, size_t dev_size)
1168 {
1169     int tap_fd, if_fd, ppa = -1;
1170     static int ip_fd = 0;
1171     char *ptr;
1172
1173     static int arp_fd = 0;
1174     int ip_muxid, arp_muxid;
1175     struct strioctl  strioc_if, strioc_ppa;
1176     int link_type = I_PLINK;;
1177     struct lifreq ifr;
1178     char actual_name[32] = "";
1179
1180     memset(&ifr, 0x0, sizeof(ifr));
1181
1182     if( *dev ){
1183        ptr = dev;
1184        while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
1185        ppa = atoi(ptr);
1186     }
1187
1188     /* Check if IP device was opened */
1189     if( ip_fd )
1190        close(ip_fd);
1191
1192     TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
1193     if (ip_fd < 0) {
1194        syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)");
1195        return -1;
1196     }
1197
1198     TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
1199     if (tap_fd < 0) {
1200        syslog(LOG_ERR, "Can't open /dev/tap");
1201        return -1;
1202     }
1203
1204     /* Assign a new PPA and get its unit number. */
1205     strioc_ppa.ic_cmd = TUNNEWPPA;
1206     strioc_ppa.ic_timout = 0;
1207     strioc_ppa.ic_len = sizeof(ppa);
1208     strioc_ppa.ic_dp = (char *)&ppa;
1209     if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
1210        syslog (LOG_ERR, "Can't assign new interface");
1211
1212     TFR(if_fd = open("/dev/tap", O_RDWR, 0));
1213     if (if_fd < 0) {
1214        syslog(LOG_ERR, "Can't open /dev/tap (2)");
1215        return -1;
1216     }
1217     if(ioctl(if_fd, I_PUSH, "ip") < 0){
1218        syslog(LOG_ERR, "Can't push IP module");
1219        return -1;
1220     }
1221
1222     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
1223         syslog(LOG_ERR, "Can't get flags\n");
1224
1225     snprintf (actual_name, 32, "tap%d", ppa);
1226     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
1227
1228     ifr.lifr_ppa = ppa;
1229     /* Assign ppa according to the unit number returned by tun device */
1230
1231     if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
1232         syslog (LOG_ERR, "Can't set PPA %d", ppa);
1233     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
1234         syslog (LOG_ERR, "Can't get flags\n");
1235     /* Push arp module to if_fd */
1236     if (ioctl (if_fd, I_PUSH, "arp") < 0)
1237         syslog (LOG_ERR, "Can't push ARP module (2)");
1238
1239     /* Push arp module to ip_fd */
1240     if (ioctl (ip_fd, I_POP, NULL) < 0)
1241         syslog (LOG_ERR, "I_POP failed\n");
1242     if (ioctl (ip_fd, I_PUSH, "arp") < 0)
1243         syslog (LOG_ERR, "Can't push ARP module (3)\n");
1244     /* Open arp_fd */
1245     TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
1246     if (arp_fd < 0)
1247        syslog (LOG_ERR, "Can't open %s\n", "/dev/tap");
1248
1249     /* Set ifname to arp */
1250     strioc_if.ic_cmd = SIOCSLIFNAME;
1251     strioc_if.ic_timout = 0;
1252     strioc_if.ic_len = sizeof(ifr);
1253     strioc_if.ic_dp = (char *)&ifr;
1254     if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
1255         syslog (LOG_ERR, "Can't set ifname to arp\n");
1256     }
1257
1258     if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
1259        syslog(LOG_ERR, "Can't link TAP device to IP");
1260        return -1;
1261     }
1262
1263     if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
1264         syslog (LOG_ERR, "Can't link TAP device to ARP");
1265
1266     close (if_fd);
1267
1268     memset(&ifr, 0x0, sizeof(ifr));
1269     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
1270     ifr.lifr_ip_muxid  = ip_muxid;
1271     ifr.lifr_arp_muxid = arp_muxid;
1272
1273     if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
1274     {
1275       ioctl (ip_fd, I_PUNLINK , arp_muxid);
1276       ioctl (ip_fd, I_PUNLINK, ip_muxid);
1277       syslog (LOG_ERR, "Can't set multiplexor id");
1278     }
1279
1280     snprintf(dev, dev_size, "tap%d", ppa);
1281     return tap_fd;
1282 }
1283
1284 static int tap_open(char *ifname, int ifname_size)
1285 {
1286     char  dev[10]="";
1287     int fd;
1288     if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){
1289        fprintf(stderr, "Cannot allocate TAP device\n");
1290        return -1;
1291     }
1292     pstrcpy(ifname, ifname_size, dev);
1293     fcntl(fd, F_SETFL, O_NONBLOCK);
1294     return fd;
1295 }
1296 #elif defined (_AIX)
1297 static int tap_open(char *ifname, int ifname_size)
1298 {
1299     fprintf (stderr, "no tap on AIX\n");
1300     return -1;
1301 }
1302 #else
1303 static int tap_open(char *ifname, int ifname_size)
1304 {
1305     struct ifreq ifr;
1306     int fd, ret;
1307
1308     TFR(fd = open("/dev/net/tun", O_RDWR));
1309     if (fd < 0) {
1310         fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n");
1311         return -1;
1312     }
1313     memset(&ifr, 0, sizeof(ifr));
1314     ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
1315     if (ifname[0] != '\0')
1316         pstrcpy(ifr.ifr_name, IFNAMSIZ, ifname);
1317     else
1318         pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d");
1319     ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
1320     if (ret != 0) {
1321         fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n");
1322         close(fd);
1323         return -1;
1324     }
1325     pstrcpy(ifname, ifname_size, ifr.ifr_name);
1326     fcntl(fd, F_SETFL, O_NONBLOCK);
1327     return fd;
1328 }
1329 #endif
1330
1331 static int launch_script(const char *setup_script, const char *ifname, int fd)
1332 {
1333     sigset_t oldmask, mask;
1334     int pid, status;
1335     char *args[3];
1336     char **parg;
1337
1338     sigemptyset(&mask);
1339     sigaddset(&mask, SIGCHLD);
1340     sigprocmask(SIG_BLOCK, &mask, &oldmask);
1341
1342     /* try to launch network script */
1343     pid = fork();
1344     if (pid == 0) {
1345         int open_max = sysconf(_SC_OPEN_MAX), i;
1346
1347         for (i = 0; i < open_max; i++) {
1348             if (i != STDIN_FILENO &&
1349                 i != STDOUT_FILENO &&
1350                 i != STDERR_FILENO &&
1351                 i != fd) {
1352                 close(i);
1353             }
1354         }
1355         parg = args;
1356         *parg++ = (char *)setup_script;
1357         *parg++ = (char *)ifname;
1358         *parg++ = NULL;
1359         execv(setup_script, args);
1360         _exit(1);
1361     } else if (pid > 0) {
1362         while (waitpid(pid, &status, 0) != pid) {
1363             /* loop */
1364         }
1365         sigprocmask(SIG_SETMASK, &oldmask, NULL);
1366
1367         if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
1368             return 0;
1369         }
1370     }
1371     fprintf(stderr, "%s: could not launch network script\n", setup_script);
1372     return -1;
1373 }
1374
1375 static int net_tap_init(VLANState *vlan, const char *model,
1376                         const char *name, const char *ifname1,
1377                         const char *setup_script, const char *down_script)
1378 {
1379     TAPState *s;
1380     int fd;
1381     char ifname[128];
1382
1383     if (ifname1 != NULL)
1384         pstrcpy(ifname, sizeof(ifname), ifname1);
1385     else
1386         ifname[0] = '\0';
1387     TFR(fd = tap_open(ifname, sizeof(ifname)));
1388     if (fd < 0)
1389         return -1;
1390
1391     if (!setup_script || !strcmp(setup_script, "no"))
1392         setup_script = "";
1393     if (setup_script[0] != '\0') {
1394         if (launch_script(setup_script, ifname, fd))
1395             return -1;
1396     }
1397     s = net_tap_fd_init(vlan, model, name, fd);
1398     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1399              "ifname=%s,script=%s,downscript=%s",
1400              ifname, setup_script, down_script);
1401     if (down_script && strcmp(down_script, "no")) {
1402         snprintf(s->down_script, sizeof(s->down_script), "%s", down_script);
1403         snprintf(s->down_script_arg, sizeof(s->down_script_arg), "%s", ifname);
1404     }
1405     return 0;
1406 }
1407
1408 #endif /* !_WIN32 */
1409
1410 #if defined(CONFIG_VDE)
1411 typedef struct VDEState {
1412     VLANClientState *vc;
1413     VDECONN *vde;
1414 } VDEState;
1415
1416 static void vde_to_qemu(void *opaque)
1417 {
1418     VDEState *s = opaque;
1419     uint8_t buf[4096];
1420     int size;
1421
1422     size = vde_recv(s->vde, (char *)buf, sizeof(buf), 0);
1423     if (size > 0) {
1424         qemu_send_packet(s->vc, buf, size);
1425     }
1426 }
1427
1428 static ssize_t vde_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1429 {
1430     VDEState *s = vc->opaque;
1431     ssize_t ret;
1432
1433     do {
1434       ret = vde_send(s->vde, (const char *)buf, size, 0);
1435     } while (ret < 0 && errno == EINTR);
1436
1437     return ret;
1438 }
1439
1440 static void vde_cleanup(VLANClientState *vc)
1441 {
1442     VDEState *s = vc->opaque;
1443     qemu_set_fd_handler(vde_datafd(s->vde), NULL, NULL, NULL);
1444     vde_close(s->vde);
1445     qemu_free(s);
1446 }
1447
1448 static int net_vde_init(VLANState *vlan, const char *model,
1449                         const char *name, const char *sock,
1450                         int port, const char *group, int mode)
1451 {
1452     VDEState *s;
1453     char *init_group = strlen(group) ? (char *)group : NULL;
1454     char *init_sock = strlen(sock) ? (char *)sock : NULL;
1455
1456     struct vde_open_args args = {
1457         .port = port,
1458         .group = init_group,
1459         .mode = mode,
1460     };
1461
1462     s = qemu_mallocz(sizeof(VDEState));
1463     s->vde = vde_open(init_sock, (char *)"QEMU", &args);
1464     if (!s->vde){
1465         free(s);
1466         return -1;
1467     }
1468     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, vde_receive,
1469                                  NULL, vde_cleanup, s);
1470     qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
1471     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "sock=%s,fd=%d",
1472              sock, vde_datafd(s->vde));
1473     return 0;
1474 }
1475 #endif
1476
1477 /* network connection */
1478 typedef struct NetSocketState {
1479     VLANClientState *vc;
1480     int fd;
1481     int state; /* 0 = getting length, 1 = getting data */
1482     unsigned int index;
1483     unsigned int packet_len;
1484     uint8_t buf[4096];
1485     struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
1486 } NetSocketState;
1487
1488 typedef struct NetSocketListenState {
1489     VLANState *vlan;
1490     char *model;
1491     char *name;
1492     int fd;
1493 } NetSocketListenState;
1494
1495 /* XXX: we consider we can send the whole packet without blocking */
1496 static ssize_t net_socket_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1497 {
1498     NetSocketState *s = vc->opaque;
1499     uint32_t len;
1500     len = htonl(size);
1501
1502     send_all(s->fd, (const uint8_t *)&len, sizeof(len));
1503     return send_all(s->fd, buf, size);
1504 }
1505
1506 static ssize_t net_socket_receive_dgram(VLANClientState *vc, const uint8_t *buf, size_t size)
1507 {
1508     NetSocketState *s = vc->opaque;
1509
1510     return sendto(s->fd, (void *)buf, size, 0,
1511                   (struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst));
1512 }
1513
1514 static void net_socket_send(void *opaque)
1515 {
1516     NetSocketState *s = opaque;
1517     int size, err;
1518     unsigned l;
1519     uint8_t buf1[4096];
1520     const uint8_t *buf;
1521
1522     size = recv(s->fd, (void *)buf1, sizeof(buf1), 0);
1523     if (size < 0) {
1524         err = socket_error();
1525         if (err != EWOULDBLOCK)
1526             goto eoc;
1527     } else if (size == 0) {
1528         /* end of connection */
1529     eoc:
1530         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1531         closesocket(s->fd);
1532         return;
1533     }
1534     buf = buf1;
1535     while (size > 0) {
1536         /* reassemble a packet from the network */
1537         switch(s->state) {
1538         case 0:
1539             l = 4 - s->index;
1540             if (l > size)
1541                 l = size;
1542             memcpy(s->buf + s->index, buf, l);
1543             buf += l;
1544             size -= l;
1545             s->index += l;
1546             if (s->index == 4) {
1547                 /* got length */
1548                 s->packet_len = ntohl(*(uint32_t *)s->buf);
1549                 s->index = 0;
1550                 s->state = 1;
1551             }
1552             break;
1553         case 1:
1554             l = s->packet_len - s->index;
1555             if (l > size)
1556                 l = size;
1557             if (s->index + l <= sizeof(s->buf)) {
1558                 memcpy(s->buf + s->index, buf, l);
1559             } else {
1560                 fprintf(stderr, "serious error: oversized packet received,"
1561                     "connection terminated.\n");
1562                 s->state = 0;
1563                 goto eoc;
1564             }
1565
1566             s->index += l;
1567             buf += l;
1568             size -= l;
1569             if (s->index >= s->packet_len) {
1570                 qemu_send_packet(s->vc, s->buf, s->packet_len);
1571                 s->index = 0;
1572                 s->state = 0;
1573             }
1574             break;
1575         }
1576     }
1577 }
1578
1579 static void net_socket_send_dgram(void *opaque)
1580 {
1581     NetSocketState *s = opaque;
1582     int size;
1583
1584     size = recv(s->fd, (void *)s->buf, sizeof(s->buf), 0);
1585     if (size < 0)
1586         return;
1587     if (size == 0) {
1588         /* end of connection */
1589         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1590         return;
1591     }
1592     qemu_send_packet(s->vc, s->buf, size);
1593 }
1594
1595 static int net_socket_mcast_create(struct sockaddr_in *mcastaddr)
1596 {
1597     struct ip_mreq imr;
1598     int fd;
1599     int val, ret;
1600     if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
1601         fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n",
1602                 inet_ntoa(mcastaddr->sin_addr),
1603                 (int)ntohl(mcastaddr->sin_addr.s_addr));
1604         return -1;
1605
1606     }
1607     fd = socket(PF_INET, SOCK_DGRAM, 0);
1608     if (fd < 0) {
1609         perror("socket(PF_INET, SOCK_DGRAM)");
1610         return -1;
1611     }
1612
1613     val = 1;
1614     ret=setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
1615                    (const char *)&val, sizeof(val));
1616     if (ret < 0) {
1617         perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
1618         goto fail;
1619     }
1620
1621     ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
1622     if (ret < 0) {
1623         perror("bind");
1624         goto fail;
1625     }
1626
1627     /* Add host to multicast group */
1628     imr.imr_multiaddr = mcastaddr->sin_addr;
1629     imr.imr_interface.s_addr = htonl(INADDR_ANY);
1630
1631     ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1632                      (const char *)&imr, sizeof(struct ip_mreq));
1633     if (ret < 0) {
1634         perror("setsockopt(IP_ADD_MEMBERSHIP)");
1635         goto fail;
1636     }
1637
1638     /* Force mcast msgs to loopback (eg. several QEMUs in same host */
1639     val = 1;
1640     ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1641                    (const char *)&val, sizeof(val));
1642     if (ret < 0) {
1643         perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
1644         goto fail;
1645     }
1646
1647     socket_set_nonblock(fd);
1648     return fd;
1649 fail:
1650     if (fd >= 0)
1651         closesocket(fd);
1652     return -1;
1653 }
1654
1655 static void net_socket_cleanup(VLANClientState *vc)
1656 {
1657     NetSocketState *s = vc->opaque;
1658     qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1659     close(s->fd);
1660     qemu_free(s);
1661 }
1662
1663 static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
1664                                                 const char *model,
1665                                                 const char *name,
1666                                                 int fd, int is_connected)
1667 {
1668     struct sockaddr_in saddr;
1669     int newfd;
1670     socklen_t saddr_len;
1671     NetSocketState *s;
1672
1673     /* fd passed: multicast: "learn" dgram_dst address from bound address and save it
1674      * Because this may be "shared" socket from a "master" process, datagrams would be recv()
1675      * by ONLY ONE process: we must "clone" this dgram socket --jjo
1676      */
1677
1678     if (is_connected) {
1679         if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
1680             /* must be bound */
1681             if (saddr.sin_addr.s_addr==0) {
1682                 fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, cannot setup multicast dst addr\n",
1683                         fd);
1684                 return NULL;
1685             }
1686             /* clone dgram socket */
1687             newfd = net_socket_mcast_create(&saddr);
1688             if (newfd < 0) {
1689                 /* error already reported by net_socket_mcast_create() */
1690                 close(fd);
1691                 return NULL;
1692             }
1693             /* clone newfd to fd, close newfd */
1694             dup2(newfd, fd);
1695             close(newfd);
1696
1697         } else {
1698             fprintf(stderr, "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
1699                     fd, strerror(errno));
1700             return NULL;
1701         }
1702     }
1703
1704     s = qemu_mallocz(sizeof(NetSocketState));
1705     s->fd = fd;
1706
1707     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, net_socket_receive_dgram,
1708                                  NULL, net_socket_cleanup, s);
1709     qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s);
1710
1711     /* mcast: save bound address as dst */
1712     if (is_connected) s->dgram_dst=saddr;
1713
1714     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1715             "socket: fd=%d (%s mcast=%s:%d)",
1716             fd, is_connected? "cloned" : "",
1717             inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1718     return s;
1719 }
1720
1721 static void net_socket_connect(void *opaque)
1722 {
1723     NetSocketState *s = opaque;
1724     qemu_set_fd_handler(s->fd, net_socket_send, NULL, s);
1725 }
1726
1727 static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
1728                                                  const char *model,
1729                                                  const char *name,
1730                                                  int fd, int is_connected)
1731 {
1732     NetSocketState *s;
1733     s = qemu_mallocz(sizeof(NetSocketState));
1734     s->fd = fd;
1735     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, net_socket_receive,
1736                                  NULL, net_socket_cleanup, s);
1737     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1738              "socket: fd=%d", fd);
1739     if (is_connected) {
1740         net_socket_connect(s);
1741     } else {
1742         qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
1743     }
1744     return s;
1745 }
1746
1747 static NetSocketState *net_socket_fd_init(VLANState *vlan,
1748                                           const char *model, const char *name,
1749                                           int fd, int is_connected)
1750 {
1751     int so_type=-1, optlen=sizeof(so_type);
1752
1753     if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type,
1754         (socklen_t *)&optlen)< 0) {
1755         fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n", fd);
1756         return NULL;
1757     }
1758     switch(so_type) {
1759     case SOCK_DGRAM:
1760         return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected);
1761     case SOCK_STREAM:
1762         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1763     default:
1764         /* who knows ... this could be a eg. a pty, do warn and continue as stream */
1765         fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
1766         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1767     }
1768     return NULL;
1769 }
1770
1771 static void net_socket_accept(void *opaque)
1772 {
1773     NetSocketListenState *s = opaque;
1774     NetSocketState *s1;
1775     struct sockaddr_in saddr;
1776     socklen_t len;
1777     int fd;
1778
1779     for(;;) {
1780         len = sizeof(saddr);
1781         fd = accept(s->fd, (struct sockaddr *)&saddr, &len);
1782         if (fd < 0 && errno != EINTR) {
1783             return;
1784         } else if (fd >= 0) {
1785             break;
1786         }
1787     }
1788     s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1);
1789     if (!s1) {
1790         closesocket(fd);
1791     } else {
1792         snprintf(s1->vc->info_str, sizeof(s1->vc->info_str),
1793                  "socket: connection from %s:%d",
1794                  inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1795     }
1796 }
1797
1798 static int net_socket_listen_init(VLANState *vlan,
1799                                   const char *model,
1800                                   const char *name,
1801                                   const char *host_str)
1802 {
1803     NetSocketListenState *s;
1804     int fd, val, ret;
1805     struct sockaddr_in saddr;
1806
1807     if (parse_host_port(&saddr, host_str) < 0)
1808         return -1;
1809
1810     s = qemu_mallocz(sizeof(NetSocketListenState));
1811
1812     fd = socket(PF_INET, SOCK_STREAM, 0);
1813     if (fd < 0) {
1814         perror("socket");
1815         return -1;
1816     }
1817     socket_set_nonblock(fd);
1818
1819     /* allow fast reuse */
1820     val = 1;
1821     setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));
1822
1823     ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
1824     if (ret < 0) {
1825         perror("bind");
1826         return -1;
1827     }
1828     ret = listen(fd, 0);
1829     if (ret < 0) {
1830         perror("listen");
1831         return -1;
1832     }
1833     s->vlan = vlan;
1834     s->model = strdup(model);
1835     s->name = name ? strdup(name) : NULL;
1836     s->fd = fd;
1837     qemu_set_fd_handler(fd, net_socket_accept, NULL, s);
1838     return 0;
1839 }
1840
1841 static int net_socket_connect_init(VLANState *vlan,
1842                                    const char *model,
1843                                    const char *name,
1844                                    const char *host_str)
1845 {
1846     NetSocketState *s;
1847     int fd, connected, ret, err;
1848     struct sockaddr_in saddr;
1849
1850     if (parse_host_port(&saddr, host_str) < 0)
1851         return -1;
1852
1853     fd = socket(PF_INET, SOCK_STREAM, 0);
1854     if (fd < 0) {
1855         perror("socket");
1856         return -1;
1857     }
1858     socket_set_nonblock(fd);
1859
1860     connected = 0;
1861     for(;;) {
1862         ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
1863         if (ret < 0) {
1864             err = socket_error();
1865             if (err == EINTR || err == EWOULDBLOCK) {
1866             } else if (err == EINPROGRESS) {
1867                 break;
1868 #ifdef _WIN32
1869             } else if (err == WSAEALREADY) {
1870                 break;
1871 #endif
1872             } else {
1873                 perror("connect");
1874                 closesocket(fd);
1875                 return -1;
1876             }
1877         } else {
1878             connected = 1;
1879             break;
1880         }
1881     }
1882     s = net_socket_fd_init(vlan, model, name, fd, connected);
1883     if (!s)
1884         return -1;
1885     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1886              "socket: connect to %s:%d",
1887              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1888     return 0;
1889 }
1890
1891 static int net_socket_mcast_init(VLANState *vlan,
1892                                  const char *model,
1893                                  const char *name,
1894                                  const char *host_str)
1895 {
1896     NetSocketState *s;
1897     int fd;
1898     struct sockaddr_in saddr;
1899
1900     if (parse_host_port(&saddr, host_str) < 0)
1901         return -1;
1902
1903
1904     fd = net_socket_mcast_create(&saddr);
1905     if (fd < 0)
1906         return -1;
1907
1908     s = net_socket_fd_init(vlan, model, name, fd, 0);
1909     if (!s)
1910         return -1;
1911
1912     s->dgram_dst = saddr;
1913
1914     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1915              "socket: mcast=%s:%d",
1916              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1917     return 0;
1918
1919 }
1920
1921 typedef struct DumpState {
1922     VLANClientState *pcap_vc;
1923     int fd;
1924     int pcap_caplen;
1925 } DumpState;
1926
1927 #define PCAP_MAGIC 0xa1b2c3d4
1928
1929 struct pcap_file_hdr {
1930     uint32_t magic;
1931     uint16_t version_major;
1932     uint16_t version_minor;
1933     int32_t thiszone;
1934     uint32_t sigfigs;
1935     uint32_t snaplen;
1936     uint32_t linktype;
1937 };
1938
1939 struct pcap_sf_pkthdr {
1940     struct {
1941         int32_t tv_sec;
1942         int32_t tv_usec;
1943     } ts;
1944     uint32_t caplen;
1945     uint32_t len;
1946 };
1947
1948 static ssize_t dump_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1949 {
1950     DumpState *s = vc->opaque;
1951     struct pcap_sf_pkthdr hdr;
1952     int64_t ts;
1953     int caplen;
1954
1955     /* Early return in case of previous error. */
1956     if (s->fd < 0) {
1957         return size;
1958     }
1959
1960     ts = muldiv64(qemu_get_clock(vm_clock), 1000000, ticks_per_sec);
1961     caplen = size > s->pcap_caplen ? s->pcap_caplen : size;
1962
1963     hdr.ts.tv_sec = ts / 1000000;
1964     hdr.ts.tv_usec = ts % 1000000;
1965     hdr.caplen = caplen;
1966     hdr.len = size;
1967     if (write(s->fd, &hdr, sizeof(hdr)) != sizeof(hdr) ||
1968         write(s->fd, buf, caplen) != caplen) {
1969         qemu_log("-net dump write error - stop dump\n");
1970         close(s->fd);
1971         s->fd = -1;
1972     }
1973
1974     return size;
1975 }
1976
1977 static void net_dump_cleanup(VLANClientState *vc)
1978 {
1979     DumpState *s = vc->opaque;
1980
1981     close(s->fd);
1982     qemu_free(s);
1983 }
1984
1985 static int net_dump_init(Monitor *mon, VLANState *vlan, const char *device,
1986                          const char *name, const char *filename, int len)
1987 {
1988     struct pcap_file_hdr hdr;
1989     DumpState *s;
1990
1991     s = qemu_malloc(sizeof(DumpState));
1992
1993     s->fd = open(filename, O_CREAT | O_WRONLY, 0644);
1994     if (s->fd < 0) {
1995         config_error(mon, "-net dump: can't open %s\n", filename);
1996         return -1;
1997     }
1998
1999     s->pcap_caplen = len;
2000
2001     hdr.magic = PCAP_MAGIC;
2002     hdr.version_major = 2;
2003     hdr.version_minor = 4;
2004     hdr.thiszone = 0;
2005     hdr.sigfigs = 0;
2006     hdr.snaplen = s->pcap_caplen;
2007     hdr.linktype = 1;
2008
2009     if (write(s->fd, &hdr, sizeof(hdr)) < sizeof(hdr)) {
2010         config_error(mon, "-net dump write error: %s\n", strerror(errno));
2011         close(s->fd);
2012         qemu_free(s);
2013         return -1;
2014     }
2015
2016     s->pcap_vc = qemu_new_vlan_client(vlan, device, name, NULL, dump_receive, NULL,
2017                                       net_dump_cleanup, s);
2018     snprintf(s->pcap_vc->info_str, sizeof(s->pcap_vc->info_str),
2019              "dump to %s (len=%d)", filename, len);
2020     return 0;
2021 }
2022
2023 /* find or alloc a new VLAN */
2024 VLANState *qemu_find_vlan(int id)
2025 {
2026     VLANState **pvlan, *vlan;
2027     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2028         if (vlan->id == id)
2029             return vlan;
2030     }
2031     vlan = qemu_mallocz(sizeof(VLANState));
2032     vlan->id = id;
2033     vlan->next = NULL;
2034     pvlan = &first_vlan;
2035     while (*pvlan != NULL)
2036         pvlan = &(*pvlan)->next;
2037     *pvlan = vlan;
2038     return vlan;
2039 }
2040
2041 static int nic_get_free_idx(void)
2042 {
2043     int index;
2044
2045     for (index = 0; index < MAX_NICS; index++)
2046         if (!nd_table[index].used)
2047             return index;
2048     return -1;
2049 }
2050
2051 void qemu_check_nic_model(NICInfo *nd, const char *model)
2052 {
2053     const char *models[2];
2054
2055     models[0] = model;
2056     models[1] = NULL;
2057
2058     qemu_check_nic_model_list(nd, models, model);
2059 }
2060
2061 void qemu_check_nic_model_list(NICInfo *nd, const char * const *models,
2062                                const char *default_model)
2063 {
2064     int i, exit_status = 0;
2065
2066     if (!nd->model)
2067         nd->model = strdup(default_model);
2068
2069     if (strcmp(nd->model, "?") != 0) {
2070         for (i = 0 ; models[i]; i++)
2071             if (strcmp(nd->model, models[i]) == 0)
2072                 return;
2073
2074         fprintf(stderr, "qemu: Unsupported NIC model: %s\n", nd->model);
2075         exit_status = 1;
2076     }
2077
2078     fprintf(stderr, "qemu: Supported NIC models: ");
2079     for (i = 0 ; models[i]; i++)
2080         fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
2081
2082     exit(exit_status);
2083 }
2084
2085 int net_client_init(Monitor *mon, const char *device, const char *p)
2086 {
2087     static const char * const fd_params[] = {
2088         "vlan", "name", "fd", NULL
2089     };
2090     char buf[1024];
2091     int vlan_id, ret;
2092     VLANState *vlan;
2093     char *name = NULL;
2094
2095     vlan_id = 0;
2096     if (get_param_value(buf, sizeof(buf), "vlan", p)) {
2097         vlan_id = strtol(buf, NULL, 0);
2098     }
2099     vlan = qemu_find_vlan(vlan_id);
2100
2101     if (get_param_value(buf, sizeof(buf), "name", p)) {
2102         name = qemu_strdup(buf);
2103     }
2104     if (!strcmp(device, "nic")) {
2105         static const char * const nic_params[] = {
2106             "vlan", "name", "macaddr", "model", NULL
2107         };
2108         NICInfo *nd;
2109         uint8_t *macaddr;
2110         int idx = nic_get_free_idx();
2111
2112         if (check_params(buf, sizeof(buf), nic_params, p) < 0) {
2113             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2114             ret = -1;
2115             goto out;
2116         }
2117         if (idx == -1 || nb_nics >= MAX_NICS) {
2118             config_error(mon, "Too Many NICs\n");
2119             ret = -1;
2120             goto out;
2121         }
2122         nd = &nd_table[idx];
2123         macaddr = nd->macaddr;
2124         macaddr[0] = 0x52;
2125         macaddr[1] = 0x54;
2126         macaddr[2] = 0x00;
2127         macaddr[3] = 0x12;
2128         macaddr[4] = 0x34;
2129         macaddr[5] = 0x56 + idx;
2130
2131         if (get_param_value(buf, sizeof(buf), "macaddr", p)) {
2132             if (parse_macaddr(macaddr, buf) < 0) {
2133                 config_error(mon, "invalid syntax for ethernet address\n");
2134                 ret = -1;
2135                 goto out;
2136             }
2137         }
2138         if (get_param_value(buf, sizeof(buf), "model", p)) {
2139             nd->model = strdup(buf);
2140         }
2141         nd->vlan = vlan;
2142         nd->name = name;
2143         nd->used = 1;
2144         name = NULL;
2145         nb_nics++;
2146         vlan->nb_guest_devs++;
2147         ret = idx;
2148     } else
2149     if (!strcmp(device, "none")) {
2150         if (*p != '\0') {
2151             config_error(mon, "'none' takes no parameters\n");
2152             ret = -1;
2153             goto out;
2154         }
2155         /* does nothing. It is needed to signal that no network cards
2156            are wanted */
2157         ret = 0;
2158     } else
2159 #ifdef CONFIG_SLIRP
2160     if (!strcmp(device, "user")) {
2161         static const char * const slirp_params[] = {
2162             "vlan", "name", "hostname", "restrict", "ip", NULL
2163         };
2164         int restricted = 0;
2165         char *ip = NULL;
2166
2167         if (check_params(buf, sizeof(buf), slirp_params, p) < 0) {
2168             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2169             ret = -1;
2170             goto out;
2171         }
2172         if (get_param_value(buf, sizeof(buf), "hostname", p)) {
2173             pstrcpy(slirp_hostname, sizeof(slirp_hostname), buf);
2174         }
2175         if (get_param_value(buf, sizeof(buf), "restrict", p)) {
2176             restricted = (buf[0] == 'y') ? 1 : 0;
2177         }
2178         if (get_param_value(buf, sizeof(buf), "ip", p)) {
2179             ip = qemu_strdup(buf);
2180         }
2181         vlan->nb_host_devs++;
2182         ret = net_slirp_init(vlan, device, name, restricted, ip);
2183         qemu_free(ip);
2184     } else if (!strcmp(device, "channel")) {
2185         long port;
2186         char name[20], *devname;
2187         struct VMChannel *vmc;
2188
2189         port = strtol(p, &devname, 10);
2190         devname++;
2191         if (port < 1 || port > 65535) {
2192             config_error(mon, "vmchannel wrong port number\n");
2193             ret = -1;
2194             goto out;
2195         }
2196         vmc = malloc(sizeof(struct VMChannel));
2197         snprintf(name, 20, "vmchannel%ld", port);
2198         vmc->hd = qemu_chr_open(name, devname, NULL);
2199         if (!vmc->hd) {
2200             config_error(mon, "could not open vmchannel device '%s'\n",
2201                          devname);
2202             ret = -1;
2203             goto out;
2204         }
2205         vmc->port = port;
2206         slirp_add_exec(3, vmc->hd, 4, port);
2207         qemu_chr_add_handlers(vmc->hd, vmchannel_can_read, vmchannel_read,
2208                 NULL, vmc);
2209         ret = 0;
2210     } else
2211 #endif
2212 #ifdef _WIN32
2213     if (!strcmp(device, "tap")) {
2214         static const char * const tap_params[] = {
2215             "vlan", "name", "ifname", NULL
2216         };
2217         char ifname[64];
2218
2219         if (check_params(buf, sizeof(buf), tap_params, p) < 0) {
2220             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2221             ret = -1;
2222             goto out;
2223         }
2224         if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
2225             config_error(mon, "tap: no interface name\n");
2226             ret = -1;
2227             goto out;
2228         }
2229         vlan->nb_host_devs++;
2230         ret = tap_win32_init(vlan, device, name, ifname);
2231     } else
2232 #elif defined (_AIX)
2233 #else
2234     if (!strcmp(device, "tap")) {
2235         char ifname[64], chkbuf[64];
2236         char setup_script[1024], down_script[1024];
2237         int fd;
2238         vlan->nb_host_devs++;
2239         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
2240             if (check_params(chkbuf, sizeof(chkbuf), fd_params, p) < 0) {
2241                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2242                 ret = -1;
2243                 goto out;
2244             }
2245             fd = strtol(buf, NULL, 0);
2246             fcntl(fd, F_SETFL, O_NONBLOCK);
2247             net_tap_fd_init(vlan, device, name, fd);
2248             ret = 0;
2249         } else {
2250             static const char * const tap_params[] = {
2251                 "vlan", "name", "ifname", "script", "downscript", NULL
2252             };
2253             if (check_params(chkbuf, sizeof(chkbuf), tap_params, p) < 0) {
2254                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2255                 ret = -1;
2256                 goto out;
2257             }
2258             if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
2259                 ifname[0] = '\0';
2260             }
2261             if (get_param_value(setup_script, sizeof(setup_script), "script", p) == 0) {
2262                 pstrcpy(setup_script, sizeof(setup_script), DEFAULT_NETWORK_SCRIPT);
2263             }
2264             if (get_param_value(down_script, sizeof(down_script), "downscript", p) == 0) {
2265                 pstrcpy(down_script, sizeof(down_script), DEFAULT_NETWORK_DOWN_SCRIPT);
2266             }
2267             ret = net_tap_init(vlan, device, name, ifname, setup_script, down_script);
2268         }
2269     } else
2270 #endif
2271     if (!strcmp(device, "socket")) {
2272         char chkbuf[64];
2273         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
2274             int fd;
2275             if (check_params(chkbuf, sizeof(chkbuf), fd_params, p) < 0) {
2276                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2277                 ret = -1;
2278                 goto out;
2279             }
2280             fd = strtol(buf, NULL, 0);
2281             ret = -1;
2282             if (net_socket_fd_init(vlan, device, name, fd, 1))
2283                 ret = 0;
2284         } else if (get_param_value(buf, sizeof(buf), "listen", p) > 0) {
2285             static const char * const listen_params[] = {
2286                 "vlan", "name", "listen", NULL
2287             };
2288             if (check_params(chkbuf, sizeof(chkbuf), listen_params, p) < 0) {
2289                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2290                 ret = -1;
2291                 goto out;
2292             }
2293             ret = net_socket_listen_init(vlan, device, name, buf);
2294         } else if (get_param_value(buf, sizeof(buf), "connect", p) > 0) {
2295             static const char * const connect_params[] = {
2296                 "vlan", "name", "connect", NULL
2297             };
2298             if (check_params(chkbuf, sizeof(chkbuf), connect_params, p) < 0) {
2299                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2300                 ret = -1;
2301                 goto out;
2302             }
2303             ret = net_socket_connect_init(vlan, device, name, buf);
2304         } else if (get_param_value(buf, sizeof(buf), "mcast", p) > 0) {
2305             static const char * const mcast_params[] = {
2306                 "vlan", "name", "mcast", NULL
2307             };
2308             if (check_params(chkbuf, sizeof(chkbuf), mcast_params, p) < 0) {
2309                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2310                 ret = -1;
2311                 goto out;
2312             }
2313             ret = net_socket_mcast_init(vlan, device, name, buf);
2314         } else {
2315             config_error(mon, "Unknown socket options: %s\n", p);
2316             ret = -1;
2317             goto out;
2318         }
2319         vlan->nb_host_devs++;
2320     } else
2321 #ifdef CONFIG_VDE
2322     if (!strcmp(device, "vde")) {
2323         static const char * const vde_params[] = {
2324             "vlan", "name", "sock", "port", "group", "mode", NULL
2325         };
2326         char vde_sock[1024], vde_group[512];
2327         int vde_port, vde_mode;
2328
2329         if (check_params(buf, sizeof(buf), vde_params, p) < 0) {
2330             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2331             ret = -1;
2332             goto out;
2333         }
2334         vlan->nb_host_devs++;
2335         if (get_param_value(vde_sock, sizeof(vde_sock), "sock", p) <= 0) {
2336             vde_sock[0] = '\0';
2337         }
2338         if (get_param_value(buf, sizeof(buf), "port", p) > 0) {
2339             vde_port = strtol(buf, NULL, 10);
2340         } else {
2341             vde_port = 0;
2342         }
2343         if (get_param_value(vde_group, sizeof(vde_group), "group", p) <= 0) {
2344             vde_group[0] = '\0';
2345         }
2346         if (get_param_value(buf, sizeof(buf), "mode", p) > 0) {
2347             vde_mode = strtol(buf, NULL, 8);
2348         } else {
2349             vde_mode = 0700;
2350         }
2351         ret = net_vde_init(vlan, device, name, vde_sock, vde_port, vde_group, vde_mode);
2352     } else
2353 #endif
2354     if (!strcmp(device, "dump")) {
2355         int len = 65536;
2356
2357         if (get_param_value(buf, sizeof(buf), "len", p) > 0) {
2358             len = strtol(buf, NULL, 0);
2359         }
2360         if (!get_param_value(buf, sizeof(buf), "file", p)) {
2361             snprintf(buf, sizeof(buf), "qemu-vlan%d.pcap", vlan_id);
2362         }
2363         ret = net_dump_init(mon, vlan, device, name, buf, len);
2364     } else {
2365         config_error(mon, "Unknown network device: %s\n", device);
2366         ret = -1;
2367         goto out;
2368     }
2369     if (ret < 0) {
2370         config_error(mon, "Could not initialize device '%s'\n", device);
2371     }
2372 out:
2373     qemu_free(name);
2374     return ret;
2375 }
2376
2377 void net_client_uninit(NICInfo *nd)
2378 {
2379     nd->vlan->nb_guest_devs--;
2380     nb_nics--;
2381     nd->used = 0;
2382     free((void *)nd->model);
2383 }
2384
2385 static int net_host_check_device(const char *device)
2386 {
2387     int i;
2388     const char *valid_param_list[] = { "tap", "socket", "dump"
2389 #ifdef CONFIG_SLIRP
2390                                        ,"user"
2391 #endif
2392 #ifdef CONFIG_VDE
2393                                        ,"vde"
2394 #endif
2395     };
2396     for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) {
2397         if (!strncmp(valid_param_list[i], device,
2398                      strlen(valid_param_list[i])))
2399             return 1;
2400     }
2401
2402     return 0;
2403 }
2404
2405 void net_host_device_add(Monitor *mon, const char *device, const char *opts)
2406 {
2407     if (!net_host_check_device(device)) {
2408         monitor_printf(mon, "invalid host network device %s\n", device);
2409         return;
2410     }
2411     if (net_client_init(mon, device, opts ? opts : "") < 0) {
2412         monitor_printf(mon, "adding host network device %s failed\n", device);
2413     }
2414 }
2415
2416 void net_host_device_remove(Monitor *mon, int vlan_id, const char *device)
2417 {
2418     VLANState *vlan;
2419     VLANClientState *vc;
2420
2421     vlan = qemu_find_vlan(vlan_id);
2422
2423     for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
2424         if (!strcmp(vc->name, device)) {
2425             break;
2426         }
2427     }
2428
2429     if (!vc) {
2430         monitor_printf(mon, "can't find device %s\n", device);
2431         return;
2432     }
2433     if (!net_host_check_device(vc->model)) {
2434         monitor_printf(mon, "invalid host network device %s\n", device);
2435         return;
2436     }
2437     qemu_del_vlan_client(vc);
2438 }
2439
2440 int net_client_parse(const char *str)
2441 {
2442     const char *p;
2443     char *q;
2444     char device[64];
2445
2446     p = str;
2447     q = device;
2448     while (*p != '\0' && *p != ',') {
2449         if ((q - device) < sizeof(device) - 1)
2450             *q++ = *p;
2451         p++;
2452     }
2453     *q = '\0';
2454     if (*p == ',')
2455         p++;
2456
2457     return net_client_init(NULL, device, p);
2458 }
2459
2460 void do_info_network(Monitor *mon)
2461 {
2462     VLANState *vlan;
2463     VLANClientState *vc;
2464
2465     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2466         monitor_printf(mon, "VLAN %d devices:\n", vlan->id);
2467         for(vc = vlan->first_client; vc != NULL; vc = vc->next)
2468             monitor_printf(mon, "  %s: %s\n", vc->name, vc->info_str);
2469     }
2470 }
2471
2472 int do_set_link(Monitor *mon, const char *name, const char *up_or_down)
2473 {
2474     VLANState *vlan;
2475     VLANClientState *vc = NULL;
2476
2477     for (vlan = first_vlan; vlan != NULL; vlan = vlan->next)
2478         for (vc = vlan->first_client; vc != NULL; vc = vc->next)
2479             if (strcmp(vc->name, name) == 0)
2480                 goto done;
2481 done:
2482
2483     if (!vc) {
2484         monitor_printf(mon, "could not find network device '%s'", name);
2485         return 0;
2486     }
2487
2488     if (strcmp(up_or_down, "up") == 0)
2489         vc->link_down = 0;
2490     else if (strcmp(up_or_down, "down") == 0)
2491         vc->link_down = 1;
2492     else
2493         monitor_printf(mon, "invalid link status '%s'; only 'up' or 'down' "
2494                        "valid\n", up_or_down);
2495
2496     if (vc->link_status_changed)
2497         vc->link_status_changed(vc);
2498
2499     return 1;
2500 }
2501
2502 void net_cleanup(void)
2503 {
2504     VLANState *vlan;
2505
2506     /* close network clients */
2507     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2508         VLANClientState *vc = vlan->first_client;
2509
2510         while (vc) {
2511             VLANClientState *next = vc->next;
2512
2513             qemu_del_vlan_client(vc);
2514
2515             vc = next;
2516         }
2517     }
2518 }
2519
2520 void net_client_check(void)
2521 {
2522     VLANState *vlan;
2523
2524     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2525         if (vlan->nb_guest_devs == 0 && vlan->nb_host_devs == 0)
2526             continue;
2527         if (vlan->nb_guest_devs == 0)
2528             fprintf(stderr, "Warning: vlan %d with no nics\n", vlan->id);
2529         if (vlan->nb_host_devs == 0)
2530             fprintf(stderr,
2531                     "Warning: vlan %d is not connected to host network\n",
2532                     vlan->id);
2533     }
2534 }