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 // FIXME: #include "qemu-kvm.h"
 114 #include "qemu-common.h"
 115 #include "net.h"
 116 #include "monitor.h"
 117 #include "sysemu.h"
 118 #include "qemu-timer.h"
 119 #include "qemu-char.h"
 120 #include "audio/audio.h"
 121 #include "qemu_socket.h"
 122 #include "qemu-log.h"
 123
 124 #if defined(CONFIG_SLIRP)
 125 #include "libslirp.h"
 126 #endif
 127
 128
 129 static VLANState *first_vlan;
 130
 131 /***********************************************************/
 132 /* network device redirectors */
 133
 134 #if defined(DEBUG_NET) || defined(DEBUG_SLIRP)
 135 static void hex_dump(FILE *f, const uint8_t *buf, int size)
 136 {
 137     int len, i, j, c;
 138
 139     for(i=0;i<size;i+=16) {
 140         len = size - i;
 141         if (len > 16)
 142             len = 16;
 143         fprintf(f, "%08x ", i);
 144         for(j=0;j<16;j++) {
 145             if (j < len)
 146                 fprintf(f, " %02x", buf[i+j]);
 147             else
 148                 fprintf(f, "   ");
 149         }
 150         fprintf(f, " ");
 151         for(j=0;j<len;j++) {
 152             c = buf[i+j];
 153             if (c < ' ' || c > '~')
 154                 c = '.';
 155             fprintf(f, "%c", c);
 156         }
 157         fprintf(f, "\n");
 158     }
 159 }
 160 #endif
 161
 162 static int parse_macaddr(uint8_t *macaddr, const char *p)
 163 {
 164     int i;
 165     char *last_char;
 166     long int offset;
 167
 168     errno = 0;
 169     offset = strtol(p, &last_char, 0);
 170     if (0 == errno && '\0' == *last_char &&
 171             offset >= 0 && offset <= 0xFFFFFF) {
 172         macaddr[3] = (offset & 0xFF0000) >> 16;
 173         macaddr[4] = (offset & 0xFF00) >> 8;
 174         macaddr[5] = offset & 0xFF;
 175         return 0;
 176     } else {
 177         for(i = 0; i < 6; i++) {
 178             macaddr[i] = strtol(p, (char **)&p, 16);
 179             if (i == 5) {
 180                 if (*p != '\0')
 181                     return -1;
 182             } else {
 183                 if (*p != ':' && *p != '-')
 184                     return -1;
 185                 p++;
 186             }
 187         }
 188         return 0;
 189     }
 190
 191     return -1;
 192 }
 193
 194 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
 195 {
 196     const char *p, *p1;
 197     int len;
 198     p = *pp;
 199     p1 = strchr(p, sep);
 200     if (!p1)
 201         return -1;
 202     len = p1 - p;
 203     p1++;
 204     if (buf_size > 0) {
 205         if (len > buf_size - 1)
 206             len = buf_size - 1;
 207         memcpy(buf, p, len);
 208         buf[len] = '\0';
 209     }
 210     *pp = p1;
 211     return 0;
 212 }
 213
 214 int parse_host_src_port(struct sockaddr_in *haddr,
 215                         struct sockaddr_in *saddr,
 216                         const char *input_str)
 217 {
 218     char *str = strdup(input_str);
 219     char *host_str = str;
 220     char *src_str;
 221     const char *src_str2;
 222     char *ptr;
 223
 224     /*
 225      * Chop off any extra arguments at the end of the string which
 226      * would start with a comma, then fill in the src port information
 227      * if it was provided else use the "any address" and "any port".
 228      */
 229     if ((ptr = strchr(str,',')))
 230         *ptr = '\0';
 231
 232     if ((src_str = strchr(input_str,'@'))) {
 233         *src_str = '\0';
 234         src_str++;
 235     }
 236
 237     if (parse_host_port(haddr, host_str) < 0)
 238         goto fail;
 239
 240     src_str2 = src_str;
 241     if (!src_str || *src_str == '\0')
 242         src_str2 = ":0";
 243
 244     if (parse_host_port(saddr, src_str2) < 0)
 245         goto fail;
 246
 247     free(str);
 248     return(0);
 249
 250 fail:
 251     free(str);
 252     return -1;
 253 }
 254
 255 int parse_host_port(struct sockaddr_in *saddr, const char *str)
 256 {
 257     char buf[512];
 258     struct hostent *he;
 259     const char *p, *r;
 260     int port;
 261
 262     p = str;
 263     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 264         return -1;
 265     saddr->sin_family = AF_INET;
 266     if (buf[0] == '\0') {
 267         saddr->sin_addr.s_addr = 0;
 268     } else {
 269         if (qemu_isdigit(buf[0])) {
 270             if (!inet_aton(buf, &saddr->sin_addr))
 271                 return -1;
 272         } else {
 273             if ((he = gethostbyname(buf)) == NULL)
 274                 return - 1;
 275             saddr->sin_addr = *(struct in_addr *)he->h_addr;
 276         }
 277     }
 278     port = strtol(p, (char **)&r, 0);
 279     if (r == p)
 280         return -1;
 281     saddr->sin_port = htons(port);
 282     return 0;
 283 }
 284
 285 #if !defined(_WIN32) && 0
 286 static int parse_unix_path(struct sockaddr_un *uaddr, const char *str)
 287 {
 288     const char *p;
 289     int len;
 290
 291     len = MIN(108, strlen(str));
 292     p = strchr(str, ',');
 293     if (p)
 294         len = MIN(len, p - str);
 295
 296     memset(uaddr, 0, sizeof(*uaddr));
 297
 298     uaddr->sun_family = AF_UNIX;
 299     memcpy(uaddr->sun_path, str, len);
 300
 301     return 0;
 302 }
 303 #endif
 304
 305 void qemu_format_nic_info_str(VLANClientState *vc, uint8_t macaddr[6])
 306 {
 307     snprintf(vc->info_str, sizeof(vc->info_str),
 308              "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x",
 309              vc->model,
 310              macaddr[0], macaddr[1], macaddr[2],
 311              macaddr[3], macaddr[4], macaddr[5]);
 312 }
 313
 314 static char *assign_name(VLANClientState *vc1, const char *model)
 315 {
 316     VLANState *vlan;
 317     char buf[256];
 318     int id = 0;
 319
 320     for (vlan = first_vlan; vlan; vlan = vlan->next) {
 321         VLANClientState *vc;
 322
 323         for (vc = vlan->first_client; vc; vc = vc->next)
 324             if (vc != vc1 && strcmp(vc->model, model) == 0)
 325                 id++;
 326     }
 327
 328     snprintf(buf, sizeof(buf), "%s.%d", model, id);
 329
 330     return strdup(buf);
 331 }
 332
 333 VLANClientState *qemu_new_vlan_client(VLANState *vlan,
 334                                       const char *model,
 335                                       const char *name,
 336                                       NetCanReceive *can_receive,
 337                                       NetReceive *receive,
 338                                       NetReceiveIOV *receive_iov,
 339                                       NetCleanup *cleanup,
 340                                       void *opaque)
 341 {
 342     VLANClientState *vc, **pvc;
 343     vc = qemu_mallocz(sizeof(VLANClientState));
 344     vc->model = strdup(model);
 345     if (name)
 346         vc->name = strdup(name);
 347     else
 348         vc->name = assign_name(vc, model);
 349     vc->can_receive = can_receive;
 350     vc->receive = receive;
 351     vc->receive_iov = receive_iov;
 352     vc->cleanup = cleanup;
 353     vc->opaque = opaque;
 354     vc->vlan = vlan;
 355
 356     vc->next = NULL;
 357     pvc = &vlan->first_client;
 358     while (*pvc != NULL)
 359         pvc = &(*pvc)->next;
 360     *pvc = vc;
 361     return vc;
 362 }
 363
 364 void qemu_del_vlan_client(VLANClientState *vc)
 365 {
 366     VLANClientState **pvc = &vc->vlan->first_client;
 367
 368     while (*pvc != NULL)
 369         if (*pvc == vc) {
 370             *pvc = vc->next;
 371             if (vc->cleanup) {
 372                 vc->cleanup(vc);
 373             }
 374             free(vc->name);
 375             free(vc->model);
 376             qemu_free(vc);
 377             break;
 378         } else
 379             pvc = &(*pvc)->next;
 380 }
 381
 382 VLANClientState *qemu_find_vlan_client(VLANState *vlan, void *opaque)
 383 {
 384     VLANClientState **pvc = &vlan->first_client;
 385
 386     while (*pvc != NULL)
 387         if ((*pvc)->opaque == opaque)
 388             return *pvc;
 389         else
 390             pvc = &(*pvc)->next;
 391
 392     return NULL;
 393 }
 394
 395 int qemu_can_send_packet(VLANClientState *sender)
 396 {
 397     VLANState *vlan = sender->vlan;
 398     VLANClientState *vc;
 399
 400     for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
 401         if (vc == sender) {
 402             continue;
 403         }
 404
 405         /* no can_receive() handler, they can always receive */
 406         if (!vc->can_receive || vc->can_receive(vc)) {
 407             return 1;
 408         }
 409     }
 410     return 0;
 411 }
 412
 413 static int
 414 qemu_deliver_packet(VLANClientState *sender, const uint8_t *buf, int size, int raw)
 415 {
 416     VLANClientState *vc;
 417     int ret = -1;
 418
 419     sender->vlan->delivering = 1;
 420
 421     for (vc = sender->vlan->first_client; vc != NULL; vc = vc->next) {
 422         ssize_t len;
 423
 424         if (vc == sender) {
 425             continue;
 426         }
 427
 428         if (vc->link_down) {
 429             ret = size;
 430             continue;
 431         }
 432
 433         if (raw && vc->receive_raw) {
 434             len = vc->receive_raw(vc, buf, size);
 435         } else {
 436             len = vc->receive(vc, buf, size);
 437         }
 438
 439         ret = (ret >= 0) ? ret : len;
 440     }
 441
 442     sender->vlan->delivering = 0;
 443
 444     return ret;
 445 }
 446
 447 void qemu_flush_queued_packets(VLANClientState *vc)
 448 {
 449     VLANPacket *packet;
 450
 451     while ((packet = vc->vlan->send_queue) != NULL) {
 452         int ret;
 453
 454         vc->vlan->send_queue = packet->next;
 455
 456         ret = qemu_deliver_packet(packet->sender, packet->data,
 457                                   packet->size, packet->raw);
 458         if (ret == 0 && packet->sent_cb != NULL) {
 459             packet->next = vc->vlan->send_queue;
 460             vc->vlan->send_queue = packet;
 461             break;
 462         }
 463
 464         if (packet->sent_cb)
 465             packet->sent_cb(packet->sender);
 466
 467         qemu_free(packet);
 468     }
 469 }
 470
 471 static void qemu_enqueue_packet(VLANClientState *sender,
 472                                 const uint8_t *buf, int size, int raw,
 473                                 NetPacketSent *sent_cb)
 474 {
 475     VLANPacket *packet;
 476
 477     packet = qemu_malloc(sizeof(VLANPacket) + size);
 478     packet->next = sender->vlan->send_queue;
 479     packet->sender = sender;
 480     packet->size = size;
 481     packet->raw = raw;
 482     packet->sent_cb = sent_cb;
 483     memcpy(packet->data, buf, size);
 484     sender->vlan->send_queue = packet;
 485 }
 486
 487 static ssize_t qemu_send_packet_async2(VLANClientState *sender,
 488                                        const uint8_t *buf, int size, int raw,
 489                                        NetPacketSent *sent_cb)
 490 {
 491     int ret;
 492
 493     if (sender->link_down) {
 494         return size;
 495     }
 496
 497 #ifdef DEBUG_NET
 498     printf("vlan %d send:\n", sender->vlan->id);
 499     hex_dump(stdout, buf, size);
 500 #endif
 501
 502     if (sender->vlan->delivering) {
 503         qemu_enqueue_packet(sender, buf, size, raw, NULL);
 504         return size;
 505     }
 506
 507     ret = qemu_deliver_packet(sender, buf, size, raw);
 508     if (ret == 0 && sent_cb != NULL) {
 509         qemu_enqueue_packet(sender, buf, size, raw, sent_cb);
 510         return 0;
 511     }
 512
 513     qemu_flush_queued_packets(sender);
 514
 515     return ret;
 516 }
 517
 518 ssize_t qemu_send_packet_async(VLANClientState *sender,
 519                                const uint8_t *buf, int size,
 520                                NetPacketSent *sent_cb)
 521 {
 522     return qemu_send_packet_async2(sender, buf, size, 0, sent_cb);
 523 }
 524
 525 ssize_t qemu_send_packet(VLANClientState *sender, const uint8_t *buf, int size)
 526 {
 527     return qemu_send_packet_async2(sender, buf, size, 0, NULL);
 528 }
 529
 530 ssize_t qemu_send_packet_raw(VLANClientState *sender, const uint8_t *buf, int size)
 531 {
 532     return qemu_send_packet_async2(sender, buf, size, 1, NULL);
 533 }
 534
 535 static ssize_t vc_sendv_compat(VLANClientState *vc, const struct iovec *iov,
 536                                int iovcnt)
 537 {
 538     uint8_t buffer[4096];
 539     size_t offset = 0;
 540     int i;
 541
 542     for (i = 0; i < iovcnt; i++) {
 543         size_t len;
 544
 545         len = MIN(sizeof(buffer) - offset, iov[i].iov_len);
 546         memcpy(buffer + offset, iov[i].iov_base, len);
 547         offset += len;
 548     }
 549
 550     return vc->receive(vc, buffer, offset);
 551 }
 552
 553 static ssize_t calc_iov_length(const struct iovec *iov, int iovcnt)
 554 {
 555     size_t offset = 0;
 556     int i;
 557
 558     for (i = 0; i < iovcnt; i++)
 559         offset += iov[i].iov_len;
 560     return offset;
 561 }
 562
 563 static int qemu_deliver_packet_iov(VLANClientState *sender,
 564                                    const struct iovec *iov, int iovcnt)
 565 {
 566     VLANClientState *vc;
 567     int ret = -1;
 568
 569     sender->vlan->delivering = 1;
 570
 571     for (vc = sender->vlan->first_client; vc != NULL; vc = vc->next) {
 572         ssize_t len;
 573
 574         if (vc == sender) {
 575             continue;
 576         }
 577
 578         if (vc->link_down) {
 579             ret = calc_iov_length(iov, iovcnt);
 580             continue;
 581         }
 582
 583         if (vc->receive_iov) {
 584             len = vc->receive_iov(vc, iov, iovcnt);
 585         } else {
 586             len = vc_sendv_compat(vc, iov, iovcnt);
 587         }
 588
 589         ret = (ret >= 0) ? ret : len;
 590     }
 591
 592     sender->vlan->delivering = 0;
 593
 594     return ret;
 595 }
 596
 597 static ssize_t qemu_enqueue_packet_iov(VLANClientState *sender,
 598                                        const struct iovec *iov, int iovcnt,
 599                                        NetPacketSent *sent_cb)
 600 {
 601     VLANPacket *packet;
 602     size_t max_len = 0;
 603     int i;
 604
 605     max_len = calc_iov_length(iov, iovcnt);
 606
 607     packet = qemu_malloc(sizeof(VLANPacket) + max_len);
 608     packet->next = sender->vlan->send_queue;
 609     packet->sender = sender;
 610     packet->sent_cb = sent_cb;
 611     packet->size = 0;
 612     packet->raw = 0;
 613
 614     for (i = 0; i < iovcnt; i++) {
 615         size_t len = iov[i].iov_len;
 616
 617         memcpy(packet->data + packet->size, iov[i].iov_base, len);
 618         packet->size += len;
 619     }
 620
 621     sender->vlan->send_queue = packet;
 622
 623     return packet->size;
 624 }
 625
 626 ssize_t qemu_sendv_packet_async(VLANClientState *sender,
 627                                 const struct iovec *iov, int iovcnt,
 628                                 NetPacketSent *sent_cb)
 629 {
 630     int ret;
 631
 632     if (sender->link_down) {
 633         return calc_iov_length(iov, iovcnt);
 634     }
 635
 636     if (sender->vlan->delivering) {
 637         return qemu_enqueue_packet_iov(sender, iov, iovcnt, NULL);
 638     }
 639
 640     ret = qemu_deliver_packet_iov(sender, iov, iovcnt);
 641     if (ret == 0 && sent_cb != NULL) {
 642         qemu_enqueue_packet_iov(sender, iov, iovcnt, sent_cb);
 643         return 0;
 644     }
 645
 646     qemu_flush_queued_packets(sender);
 647
 648     return ret;
 649 }
 650
 651 ssize_t
 652 qemu_sendv_packet(VLANClientState *vc, const struct iovec *iov, int iovcnt)
 653 {
 654     return qemu_sendv_packet_async(vc, iov, iovcnt, NULL);
 655 }
 656
 657 static void config_error(Monitor *mon, const char *fmt, ...)
 658 {
 659     va_list ap;
 660
 661     va_start(ap, fmt);
 662     if (mon) {
 663         monitor_vprintf(mon, fmt, ap);
 664     } else {
 665         fprintf(stderr, "qemu: ");
 666         vfprintf(stderr, fmt, ap);
 667         exit(1);
 668     }
 669     va_end(ap);
 670 }
 671
 672 #if defined(CONFIG_SLIRP)
 673
 674 /* slirp network adapter */
 675
 676 struct slirp_config_str {
 677     struct slirp_config_str *next;
 678     const char *str;
 679 };
 680
 681 static int slirp_inited;
 682 static struct slirp_config_str *slirp_redirs;
 683 #ifndef _WIN32
 684 static const char *slirp_smb_export;
 685 #endif
 686 static VLANClientState *slirp_vc;
 687
 688 #ifndef _WIN32
 689 static void slirp_smb(const char *exported_dir);
 690 #endif
 691 static void slirp_redirection(Monitor *mon, const char *redir_str);
 692
 693 int slirp_can_output(void)
 694 {
 695     return !slirp_vc || qemu_can_send_packet(slirp_vc);
 696 }
 697
 698 void slirp_output(const uint8_t *pkt, int pkt_len)
 699 {
 700 #ifdef DEBUG_SLIRP
 701     printf("slirp output:\n");
 702     hex_dump(stdout, pkt, pkt_len);
 703 #endif
 704     if (!slirp_vc)
 705         return;
 706     qemu_send_packet(slirp_vc, pkt, pkt_len);
 707 }
 708
 709 int slirp_is_inited(void)
 710 {
 711     return slirp_inited;
 712 }
 713
 714 static ssize_t slirp_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
 715 {
 716 #ifdef DEBUG_SLIRP
 717     printf("slirp input:\n");
 718     hex_dump(stdout, buf, size);
 719 #endif
 720     slirp_input(buf, size);
 721     return size;
 722 }
 723
 724 static int slirp_in_use;
 725
 726 static void net_slirp_cleanup(VLANClientState *vc)
 727 {
 728     slirp_in_use = 0;
 729 }
 730
 731 static int net_slirp_init(VLANState *vlan, const char *model, const char *name,
 732                           int restricted, const char *ip)
 733 {
 734     if (slirp_in_use) {
 735         /* slirp only supports a single instance so far */
 736         return -1;
 737     }
 738     if (!slirp_inited) {
 739         slirp_inited = 1;
 740         slirp_init(restricted, ip);
 741
 742         while (slirp_redirs) {
 743             struct slirp_config_str *config = slirp_redirs;
 744
 745             slirp_redirection(NULL, config->str);
 746             slirp_redirs = config->next;
 747             qemu_free(config);
 748         }
 749 #ifndef _WIN32
 750         if (slirp_smb_export) {
 751             slirp_smb(slirp_smb_export);
 752         }
 753 #endif
 754     }
 755
 756     slirp_vc = qemu_new_vlan_client(vlan, model, name, NULL, slirp_receive,
 757                                     NULL, net_slirp_cleanup, NULL);
 758     slirp_vc->info_str[0] = '\0';
 759     slirp_in_use = 1;
 760     return 0;
 761 }
 762
 763 static void net_slirp_redir_print(void *opaque, int is_udp,
 764                                   struct in_addr *laddr, u_int lport,
 765                                   struct in_addr *faddr, u_int fport)
 766 {
 767     Monitor *mon = (Monitor *)opaque;
 768     uint32_t h_addr;
 769     uint32_t g_addr;
 770     char buf[16];
 771
 772     h_addr = ntohl(faddr->s_addr);
 773     g_addr = ntohl(laddr->s_addr);
 774
 775     monitor_printf(mon, "  %s |", is_udp ? "udp" : "tcp" );
 776     snprintf(buf, 15, "%d.%d.%d.%d", (h_addr >> 24) & 0xff,
 777                                      (h_addr >> 16) & 0xff,
 778                                      (h_addr >> 8) & 0xff,
 779                                      (h_addr) & 0xff);
 780     monitor_printf(mon, " %15s |", buf);
 781     monitor_printf(mon, " %5d |", fport);
 782
 783     snprintf(buf, 15, "%d.%d.%d.%d", (g_addr >> 24) & 0xff,
 784                                      (g_addr >> 16) & 0xff,
 785                                      (g_addr >> 8) & 0xff,
 786                                      (g_addr) & 0xff);
 787     monitor_printf(mon, " %15s |", buf);
 788     monitor_printf(mon, " %5d\n", lport);
 789
 790 }
 791
 792 static void net_slirp_redir_list(Monitor *mon)
 793 {
 794     if (!mon)
 795         return;
 796
 797     monitor_printf(mon, " Prot |    Host Addr    | HPort |    Guest Addr   | GPort\n");
 798     monitor_printf(mon, "      |                 |       |                 |      \n");
 799     slirp_redir_loop(net_slirp_redir_print, mon);
 800 }
 801
 802 static void net_slirp_redir_rm(Monitor *mon, const char *port_str)
 803 {
 804     int host_port;
 805     char buf[256] = "";
 806     const char *p = port_str;
 807     int is_udp = 0;
 808     int n;
 809
 810     if (!mon)
 811         return;
 812
 813     if (!port_str || !port_str[0])
 814         goto fail_syntax;
 815
 816     get_str_sep(buf, sizeof(buf), &p, ':');
 817
 818     if (!strcmp(buf, "tcp") || buf[0] == '\0') {
 819         is_udp = 0;
 820     } else if (!strcmp(buf, "udp")) {
 821         is_udp = 1;
 822     } else {
 823         goto fail_syntax;
 824     }
 825
 826     host_port = atoi(p);
 827
 828     n = slirp_redir_rm(is_udp, host_port);
 829
 830     monitor_printf(mon, "removed %d redirections to %s port %d\n", n,
 831                         is_udp ? "udp" : "tcp", host_port);
 832     return;
 833
 834  fail_syntax:
 835     monitor_printf(mon, "invalid format\n");
 836 }
 837
 838 static void slirp_redirection(Monitor *mon, const char *redir_str)
 839 {
 840     struct in_addr guest_addr;
 841     int host_port, guest_port;
 842     const char *p;
 843     char buf[256], *r;
 844     int is_udp;
 845
 846     p = redir_str;
 847     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 848         goto fail_syntax;
 849     }
 850     if (!strcmp(buf, "tcp") || buf[0] == '\0') {
 851         is_udp = 0;
 852     } else if (!strcmp(buf, "udp")) {
 853         is_udp = 1;
 854     } else {
 855         goto fail_syntax;
 856     }
 857
 858     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 859         goto fail_syntax;
 860     }
 861     host_port = strtol(buf, &r, 0);
 862     if (r == buf) {
 863         goto fail_syntax;
 864     }
 865
 866     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 867         goto fail_syntax;
 868     }
 869     if (buf[0] == '\0') {
 870         pstrcpy(buf, sizeof(buf), "10.0.2.15");
 871     }
 872     if (!inet_aton(buf, &guest_addr)) {
 873         goto fail_syntax;
 874     }
 875
 876     guest_port = strtol(p, &r, 0);
 877     if (r == p) {
 878         goto fail_syntax;
 879     }
 880
 881     if (slirp_redir(is_udp, host_port, guest_addr, guest_port) < 0) {
 882         config_error(mon, "could not set up redirection '%s'\n", redir_str);
 883     }
 884     return;
 885
 886  fail_syntax:
 887     config_error(mon, "invalid redirection format '%s'\n", redir_str);
 888 }
 889
 890 void net_slirp_redir(Monitor *mon, const char *redir_str, const char *redir_opt2)
 891 {
 892     struct slirp_config_str *config;
 893
 894     if (!slirp_inited) {
 895         if (mon) {
 896             monitor_printf(mon, "user mode network stack not in use\n");
 897         } else {
 898             config = qemu_malloc(sizeof(*config));
 899             config->str = redir_str;
 900             config->next = slirp_redirs;
 901             slirp_redirs = config;
 902         }
 903         return;
 904     }
 905
 906     if (!strcmp(redir_str, "remove")) {
 907         net_slirp_redir_rm(mon, redir_opt2);
 908         return;
 909     }
 910
 911     if (!strcmp(redir_str, "list")) {
 912         net_slirp_redir_list(mon);
 913         return;
 914     }
 915
 916     slirp_redirection(mon, redir_str);
 917 }
 918
 919 #ifndef _WIN32
 920
 921 static char smb_dir[1024];
 922
 923 static void erase_dir(char *dir_name)
 924 {
 925     DIR *d;
 926     struct dirent *de;
 927     char filename[1024];
 928
 929     /* erase all the files in the directory */
 930     if ((d = opendir(dir_name)) != NULL) {
 931         for(;;) {
 932             de = readdir(d);
 933             if (!de)
 934                 break;
 935             if (strcmp(de->d_name, ".") != 0 &&
 936                 strcmp(de->d_name, "..") != 0) {
 937                 snprintf(filename, sizeof(filename), "%s/%s",
 938                          smb_dir, de->d_name);
 939                 if (unlink(filename) != 0)  /* is it a directory? */
 940                     erase_dir(filename);
 941             }
 942         }
 943         closedir(d);
 944         rmdir(dir_name);
 945     }
 946 }
 947
 948 /* automatic user mode samba server configuration */
 949 static void smb_exit(void)
 950 {
 951     erase_dir(smb_dir);
 952 }
 953
 954 static void slirp_smb(const char *exported_dir)
 955 {
 956     char smb_conf[1024];
 957     char smb_cmdline[1024];
 958     FILE *f;
 959
 960     /* XXX: better tmp dir construction */
 961     snprintf(smb_dir, sizeof(smb_dir), "/tmp/qemu-smb.%ld", (long)getpid());
 962     if (mkdir(smb_dir, 0700) < 0) {
 963         fprintf(stderr, "qemu: could not create samba server dir '%s'\n", smb_dir);
 964         exit(1);
 965     }
 966     snprintf(smb_conf, sizeof(smb_conf), "%s/%s", smb_dir, "smb.conf");
 967
 968     f = fopen(smb_conf, "w");
 969     if (!f) {
 970         fprintf(stderr, "qemu: could not create samba server configuration file '%s'\n", smb_conf);
 971         exit(1);
 972     }
 973     fprintf(f,
 974             "[global]\n"
 975             "private dir=%s\n"
 976             "smb ports=0\n"
 977             "socket address=127.0.0.1\n"
 978             "pid directory=%s\n"
 979             "lock directory=%s\n"
 980             "log file=%s/log.smbd\n"
 981             "smb passwd file=%s/smbpasswd\n"
 982             "security = share\n"
 983             "[qemu]\n"
 984             "path=%s\n"
 985             "read only=no\n"
 986             "guest ok=yes\n",
 987             smb_dir,
 988             smb_dir,
 989             smb_dir,
 990             smb_dir,
 991             smb_dir,
 992             exported_dir
 993             );
 994     fclose(f);
 995     atexit(smb_exit);
 996
 997     snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -s %s",
 998              SMBD_COMMAND, smb_conf);
 999
1000     slirp_add_exec(0, smb_cmdline, 4, 139);
1001 }
1002
1003 /* automatic user mode samba server configuration */
1004 void net_slirp_smb(const char *exported_dir)
1005 {
1006     if (slirp_smb_export) {
1007         fprintf(stderr, "-smb given twice\n");
1008         exit(1);
1009     }
1010     slirp_smb_export = exported_dir;
1011     if (slirp_inited) {
1012         slirp_smb(exported_dir);
1013     }
1014 }
1015
1016 #endif /* !defined(_WIN32) */
1017
1018 void do_info_slirp(Monitor *mon)
1019 {
1020     slirp_stats();
1021 }
1022
1023 struct VMChannel {
1024     CharDriverState *hd;
1025     int port;
1026 };
1027
1028 static int vmchannel_can_read(void *opaque)
1029 {
1030     struct VMChannel *vmc = (struct VMChannel*)opaque;
1031     return slirp_socket_can_recv(4, vmc->port);
1032 }
1033
1034 static void vmchannel_read(void *opaque, const uint8_t *buf, int size)
1035 {
1036     struct VMChannel *vmc = (struct VMChannel*)opaque;
1037     slirp_socket_recv(4, vmc->port, buf, size);
1038 }
1039
1040 #endif /* CONFIG_SLIRP */
1041
1042 #ifdef _WIN32
1043
1044 int tap_has_vnet_hdr(void *opaque)
1045 {
1046     return 0;
1047 }
1048
1049 void tap_using_vnet_hdr(void *opaque, int using_vnet_hdr)
1050 {
1051 }
1052
1053 #else /* !defined(_WIN32) */
1054
1055 /* Maximum GSO packet size (64k) plus plenty of room for
1056  * the ethernet and virtio_net headers
1057  */
1058 #define TAP_BUFSIZE (4096 + 65536)
1059
1060 #ifdef IFF_VNET_HDR
1061 #include <linux/virtio_net.h>
1062 #endif
1063
1064 typedef struct TAPState {
1065     VLANClientState *vc;
1066     int fd;
1067     char down_script[1024];
1068     char down_script_arg[128];
1069     uint8_t buf[TAP_BUFSIZE];
1070     unsigned int has_vnet_hdr : 1;
1071     unsigned int using_vnet_hdr : 1;
1072 } TAPState;
1073
1074 static int launch_script(const char *setup_script, const char *ifname, int fd);
1075
1076 static ssize_t tap_receive_iov(VLANClientState *vc, const struct iovec *iov,
1077                                int iovcnt)
1078 {
1079     TAPState *s = vc->opaque;
1080     ssize_t len;
1081
1082     do {
1083         len = writev(s->fd, iov, iovcnt);
1084     } while (len == -1 && (errno == EINTR || errno == EAGAIN));
1085
1086     return len;
1087 }
1088
1089 static ssize_t tap_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1090 {
1091     struct iovec iov[2];
1092     int i = 0;
1093
1094 #ifdef IFF_VNET_HDR
1095     TAPState *s = vc->opaque;
1096     struct virtio_net_hdr hdr = { 0, };
1097
1098     if (s->has_vnet_hdr && !s->using_vnet_hdr) {
1099         iov[i].iov_base = &hdr;
1100         iov[i].iov_len  = sizeof(hdr);
1101         i++;
1102     }
1103 #endif
1104
1105     iov[i].iov_base = (char *) buf;
1106     iov[i].iov_len  = size;
1107     i++;
1108
1109     return tap_receive_iov(vc, iov, i);
1110 }
1111
1112 static ssize_t tap_receive_raw(VLANClientState *vc, const uint8_t *buf, size_t size)
1113 {
1114     struct iovec iov[2];
1115     int i = 0;
1116
1117 #ifdef IFF_VNET_HDR
1118     TAPState *s = vc->opaque;
1119     struct virtio_net_hdr hdr = { 0, };
1120
1121     if (s->has_vnet_hdr && s->using_vnet_hdr) {
1122         iov[i].iov_base = &hdr;
1123         iov[i].iov_len  = sizeof(hdr);
1124         i++;
1125     }
1126 #endif
1127
1128     iov[i].iov_base = (char *) buf;
1129     iov[i].iov_len  = size;
1130     i++;
1131
1132     return tap_receive_iov(vc, iov, i);
1133 }
1134
1135 static int tap_can_send(void *opaque)
1136 {
1137     TAPState *s = opaque;
1138
1139     return qemu_can_send_packet(s->vc);
1140 }
1141
1142 #ifdef __sun__
1143 static ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
1144 {
1145     struct strbuf sbuf;
1146     int f = 0;
1147
1148     sbuf.maxlen = maxlen;
1149     sbuf.buf = (char *)buf;
1150
1151     return getmsg(tapfd, NULL, &sbuf, &f) >= 0 ? sbuf.len : -1;
1152 }
1153 #else
1154 static ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
1155 {
1156     return read(tapfd, buf, maxlen);
1157 }
1158 #endif
1159
1160 static void tap_send(void *opaque);
1161
1162 static void tap_send_completed(VLANClientState *vc)
1163 {
1164     TAPState *s = vc->opaque;
1165
1166     qemu_set_fd_handler2(s->fd, tap_can_send, tap_send, NULL, s);
1167 }
1168
1169 static void tap_send(void *opaque)
1170 {
1171     TAPState *s = opaque;
1172     int size;
1173
1174     do {
1175         size = tap_read_packet(s->fd, s->buf, sizeof(s->buf));
1176         if (size <= 0) {
1177             break;
1178         }
1179
1180         size = qemu_send_packet_async(s->vc, s->buf, size, tap_send_completed);
1181         if (size == 0) {
1182             qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
1183         }
1184     } while (size > 0);
1185 }
1186
1187 int tap_has_vnet_hdr(void *opaque)
1188 {
1189     VLANClientState *vc = opaque;
1190     TAPState *s = vc->opaque;
1191
1192     return s ? s->has_vnet_hdr : 0;
1193 }
1194
1195 void tap_using_vnet_hdr(void *opaque, int using_vnet_hdr)
1196 {
1197     VLANClientState *vc = opaque;
1198     TAPState *s = vc->opaque;
1199
1200     if (!s || !s->has_vnet_hdr)
1201         return;
1202
1203     s->using_vnet_hdr = using_vnet_hdr != 0;
1204 }
1205
1206 static int tap_probe_vnet_hdr(int fd)
1207 {
1208 #if defined(TUNGETIFF) && defined(IFF_VNET_HDR)
1209     struct ifreq ifr;
1210
1211     if (ioctl(fd, TUNGETIFF, &ifr) != 0) {
1212         fprintf(stderr, "TUNGETIFF ioctl() failed: %s\n", strerror(errno));
1213         return 0;
1214     }
1215
1216     return ifr.ifr_flags & IFF_VNET_HDR;
1217 #else
1218     return 0;
1219 #endif
1220 }
1221
1222 #ifdef TUNSETOFFLOAD
1223 static void tap_set_offload(VLANClientState *vc, int csum, int tso4, int tso6,
1224                             int ecn)
1225 {
1226     TAPState *s = vc->opaque;
1227     unsigned int offload = 0;
1228
1229     if (csum) {
1230         offload |= TUN_F_CSUM;
1231         if (tso4)
1232             offload |= TUN_F_TSO4;
1233         if (tso6)
1234             offload |= TUN_F_TSO6;
1235         if ((tso4 || tso6) && ecn)
1236             offload |= TUN_F_TSO_ECN;
1237     }
1238
1239     if (ioctl(s->fd, TUNSETOFFLOAD, offload) != 0)
1240         fprintf(stderr, "TUNSETOFFLOAD ioctl() failed: %s\n",
1241                 strerror(errno));
1242 }
1243 #endif /* TUNSETOFFLOAD */
1244
1245 static void tap_cleanup(VLANClientState *vc)
1246 {
1247     TAPState *s = vc->opaque;
1248
1249     if (s->down_script[0])
1250         launch_script(s->down_script, s->down_script_arg, s->fd);
1251
1252     qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1253     close(s->fd);
1254     qemu_free(s);
1255 }
1256
1257 /* fd support */
1258
1259 static TAPState *net_tap_fd_init(VLANState *vlan,
1260                                  const char *model,
1261                                  const char *name,
1262                                  int fd,
1263                                  int vnet_hdr)
1264 {
1265     TAPState *s;
1266
1267     s = qemu_mallocz(sizeof(TAPState));
1268     s->fd = fd;
1269     s->has_vnet_hdr = vnet_hdr != 0;
1270     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, tap_receive,
1271                                  tap_receive_iov, tap_cleanup, s);
1272     s->vc->receive_raw = tap_receive_raw;
1273 #ifdef TUNSETOFFLOAD
1274     s->vc->set_offload = tap_set_offload;
1275     tap_set_offload(s->vc, 0, 0, 0, 0);
1276 #endif
1277     qemu_set_fd_handler2(s->fd, tap_can_send, tap_send, NULL, s);
1278     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "fd=%d", fd);
1279     return s;
1280 }
1281
1282 #if defined (HOST_BSD) || defined (__FreeBSD_kernel__)
1283 static int tap_open(char *ifname, int ifname_size)
1284 {
1285     int fd;
1286     char *dev;
1287     struct stat s;
1288
1289     TFR(fd = open("/dev/tap", O_RDWR));
1290     if (fd < 0) {
1291         fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n");
1292         return -1;
1293     }
1294
1295     fstat(fd, &s);
1296     dev = devname(s.st_rdev, S_IFCHR);
1297     pstrcpy(ifname, ifname_size, dev);
1298
1299     fcntl(fd, F_SETFL, O_NONBLOCK);
1300     return fd;
1301 }
1302 #elif defined(__sun__)
1303 #define TUNNEWPPA       (('T'<<16) | 0x0001)
1304 /*
1305  * Allocate TAP device, returns opened fd.
1306  * Stores dev name in the first arg(must be large enough).
1307  */
1308 static int tap_alloc(char *dev, size_t dev_size)
1309 {
1310     int tap_fd, if_fd, ppa = -1;
1311     static int ip_fd = 0;
1312     char *ptr;
1313
1314     static int arp_fd = 0;
1315     int ip_muxid, arp_muxid;
1316     struct strioctl  strioc_if, strioc_ppa;
1317     int link_type = I_PLINK;;
1318     struct lifreq ifr;
1319     char actual_name[32] = "";
1320
1321     memset(&ifr, 0x0, sizeof(ifr));
1322
1323     if( *dev ){
1324        ptr = dev;
1325        while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
1326        ppa = atoi(ptr);
1327     }
1328
1329     /* Check if IP device was opened */
1330     if( ip_fd )
1331        close(ip_fd);
1332
1333     TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
1334     if (ip_fd < 0) {
1335        syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)");
1336        return -1;
1337     }
1338
1339     TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
1340     if (tap_fd < 0) {
1341        syslog(LOG_ERR, "Can't open /dev/tap");
1342        return -1;
1343     }
1344
1345     /* Assign a new PPA and get its unit number. */
1346     strioc_ppa.ic_cmd = TUNNEWPPA;
1347     strioc_ppa.ic_timout = 0;
1348     strioc_ppa.ic_len = sizeof(ppa);
1349     strioc_ppa.ic_dp = (char *)&ppa;
1350     if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
1351        syslog (LOG_ERR, "Can't assign new interface");
1352
1353     TFR(if_fd = open("/dev/tap", O_RDWR, 0));
1354     if (if_fd < 0) {
1355        syslog(LOG_ERR, "Can't open /dev/tap (2)");
1356        return -1;
1357     }
1358     if(ioctl(if_fd, I_PUSH, "ip") < 0){
1359        syslog(LOG_ERR, "Can't push IP module");
1360        return -1;
1361     }
1362
1363     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
1364         syslog(LOG_ERR, "Can't get flags\n");
1365
1366     snprintf (actual_name, 32, "tap%d", ppa);
1367     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
1368
1369     ifr.lifr_ppa = ppa;
1370     /* Assign ppa according to the unit number returned by tun device */
1371
1372     if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
1373         syslog (LOG_ERR, "Can't set PPA %d", ppa);
1374     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
1375         syslog (LOG_ERR, "Can't get flags\n");
1376     /* Push arp module to if_fd */
1377     if (ioctl (if_fd, I_PUSH, "arp") < 0)
1378         syslog (LOG_ERR, "Can't push ARP module (2)");
1379
1380     /* Push arp module to ip_fd */
1381     if (ioctl (ip_fd, I_POP, NULL) < 0)
1382         syslog (LOG_ERR, "I_POP failed\n");
1383     if (ioctl (ip_fd, I_PUSH, "arp") < 0)
1384         syslog (LOG_ERR, "Can't push ARP module (3)\n");
1385     /* Open arp_fd */
1386     TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
1387     if (arp_fd < 0)
1388        syslog (LOG_ERR, "Can't open %s\n", "/dev/tap");
1389
1390     /* Set ifname to arp */
1391     strioc_if.ic_cmd = SIOCSLIFNAME;
1392     strioc_if.ic_timout = 0;
1393     strioc_if.ic_len = sizeof(ifr);
1394     strioc_if.ic_dp = (char *)&ifr;
1395     if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
1396         syslog (LOG_ERR, "Can't set ifname to arp\n");
1397     }
1398
1399     if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
1400        syslog(LOG_ERR, "Can't link TAP device to IP");
1401        return -1;
1402     }
1403
1404     if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
1405         syslog (LOG_ERR, "Can't link TAP device to ARP");
1406
1407     close (if_fd);
1408
1409     memset(&ifr, 0x0, sizeof(ifr));
1410     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
1411     ifr.lifr_ip_muxid  = ip_muxid;
1412     ifr.lifr_arp_muxid = arp_muxid;
1413
1414     if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
1415     {
1416       ioctl (ip_fd, I_PUNLINK , arp_muxid);
1417       ioctl (ip_fd, I_PUNLINK, ip_muxid);
1418       syslog (LOG_ERR, "Can't set multiplexor id");
1419     }
1420
1421     snprintf(dev, dev_size, "tap%d", ppa);
1422     return tap_fd;
1423 }
1424
1425 static int tap_open(char *ifname, int ifname_size, int *vnet_hdr)
1426 {
1427     char  dev[10]="";
1428     int fd;
1429     if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){
1430        fprintf(stderr, "Cannot allocate TAP device\n");
1431        return -1;
1432     }
1433     pstrcpy(ifname, ifname_size, dev);
1434     fcntl(fd, F_SETFL, O_NONBLOCK);
1435     return fd;
1436 }
1437 #elif defined (_AIX)
1438 static int tap_open(char *ifname, int ifname_size)
1439 {
1440     fprintf (stderr, "no tap on AIX\n");
1441     return -1;
1442 }
1443 #else
1444 static int tap_open(char *ifname, int ifname_size, int *vnet_hdr)
1445 {
1446     struct ifreq ifr;
1447     int fd, ret;
1448
1449     TFR(fd = open("/dev/net/tun", O_RDWR));
1450     if (fd < 0) {
1451         fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n");
1452         return -1;
1453     }
1454     memset(&ifr, 0, sizeof(ifr));
1455     ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
1456
1457 #if defined(TUNGETFEATURES) && defined(IFF_VNET_HDR)
1458     {
1459         unsigned int features;
1460
1461         if (ioctl(fd, TUNGETFEATURES, &features) == 0 &&
1462             features & IFF_VNET_HDR) {
1463             *vnet_hdr = 1;
1464             ifr.ifr_flags |= IFF_VNET_HDR;
1465         }
1466     }
1467 #endif
1468
1469     if (ifname[0] != '\0')
1470         pstrcpy(ifr.ifr_name, IFNAMSIZ, ifname);
1471     else
1472         pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d");
1473     ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
1474     if (ret != 0) {
1475         fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n");
1476         close(fd);
1477         return -1;
1478     }
1479     pstrcpy(ifname, ifname_size, ifr.ifr_name);
1480     fcntl(fd, F_SETFL, O_NONBLOCK);
1481     return fd;
1482 }
1483 #endif
1484
1485 static int launch_script(const char *setup_script, const char *ifname, int fd)
1486 {
1487     sigset_t oldmask, mask;
1488     int pid, status;
1489     char *args[3];
1490     char **parg;
1491
1492     sigemptyset(&mask);
1493     sigaddset(&mask, SIGCHLD);
1494     sigprocmask(SIG_BLOCK, &mask, &oldmask);
1495
1496     /* try to launch network script */
1497     pid = fork();
1498     if (pid == 0) {
1499         int open_max = sysconf(_SC_OPEN_MAX), i;
1500
1501         for (i = 0; i < open_max; i++) {
1502             if (i != STDIN_FILENO &&
1503                 i != STDOUT_FILENO &&
1504                 i != STDERR_FILENO &&
1505                 i != fd) {
1506                 close(i);
1507             }
1508         }
1509         parg = args;
1510         *parg++ = (char *)setup_script;
1511         *parg++ = (char *)ifname;
1512         *parg++ = NULL;
1513         execv(setup_script, args);
1514         _exit(1);
1515     } else if (pid > 0) {
1516         while (waitpid(pid, &status, 0) != pid) {
1517             /* loop */
1518         }
1519         sigprocmask(SIG_SETMASK, &oldmask, NULL);
1520
1521         if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
1522             return 0;
1523         }
1524     }
1525     fprintf(stderr, "%s: could not launch network script\n", setup_script);
1526     return -1;
1527 }
1528
1529 static int net_tap_init(VLANState *vlan, const char *model,
1530                         const char *name, const char *ifname1,
1531                         const char *setup_script, const char *down_script)
1532 {
1533     TAPState *s;
1534     int fd;
1535     int vnet_hdr;
1536     char ifname[128];
1537
1538     if (ifname1 != NULL)
1539         pstrcpy(ifname, sizeof(ifname), ifname1);
1540     else
1541         ifname[0] = '\0';
1542     vnet_hdr = 0;
1543     TFR(fd = tap_open(ifname, sizeof(ifname), &vnet_hdr));
1544     if (fd < 0)
1545         return -1;
1546
1547     if (!setup_script || !strcmp(setup_script, "no"))
1548         setup_script = "";
1549     if (setup_script[0] != '\0') {
1550         if (launch_script(setup_script, ifname, fd))
1551             return -1;
1552     }
1553     s = net_tap_fd_init(vlan, model, name, fd, vnet_hdr);
1554     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1555              "ifname=%s,script=%s,downscript=%s",
1556              ifname, setup_script, down_script);
1557     if (down_script && strcmp(down_script, "no")) {
1558         snprintf(s->down_script, sizeof(s->down_script), "%s", down_script);
1559         snprintf(s->down_script_arg, sizeof(s->down_script_arg), "%s", ifname);
1560     }
1561     return 0;
1562 }
1563
1564 #endif /* !_WIN32 */
1565
1566 #if defined(CONFIG_VDE)
1567 typedef struct VDEState {
1568     VLANClientState *vc;
1569     VDECONN *vde;
1570 } VDEState;
1571
1572 static void vde_to_qemu(void *opaque)
1573 {
1574     VDEState *s = opaque;
1575     uint8_t buf[4096];
1576     int size;
1577
1578     size = vde_recv(s->vde, (char *)buf, sizeof(buf), 0);
1579     if (size > 0) {
1580         qemu_send_packet(s->vc, buf, size);
1581     }
1582 }
1583
1584 static ssize_t vde_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1585 {
1586     VDEState *s = vc->opaque;
1587     ssize_t ret;
1588
1589     do {
1590       ret = vde_send(s->vde, (const char *)buf, size, 0);
1591     } while (ret < 0 && errno == EINTR);
1592
1593     return ret;
1594 }
1595
1596 static void vde_cleanup(VLANClientState *vc)
1597 {
1598     VDEState *s = vc->opaque;
1599     qemu_set_fd_handler(vde_datafd(s->vde), NULL, NULL, NULL);
1600     vde_close(s->vde);
1601     qemu_free(s);
1602 }
1603
1604 static int net_vde_init(VLANState *vlan, const char *model,
1605                         const char *name, const char *sock,
1606                         int port, const char *group, int mode)
1607 {
1608     VDEState *s;
1609     char *init_group = strlen(group) ? (char *)group : NULL;
1610     char *init_sock = strlen(sock) ? (char *)sock : NULL;
1611
1612     struct vde_open_args args = {
1613         .port = port,
1614         .group = init_group,
1615         .mode = mode,
1616     };
1617
1618     s = qemu_mallocz(sizeof(VDEState));
1619     s->vde = vde_open(init_sock, (char *)"QEMU", &args);
1620     if (!s->vde){
1621         free(s);
1622         return -1;
1623     }
1624     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, vde_receive,
1625                                  NULL, vde_cleanup, s);
1626     qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
1627     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "sock=%s,fd=%d",
1628              sock, vde_datafd(s->vde));
1629     return 0;
1630 }
1631 #endif
1632
1633 /* network connection */
1634 typedef struct NetSocketState {
1635     VLANClientState *vc;
1636     int fd;
1637     int state; /* 0 = getting length, 1 = getting data */
1638     unsigned int index;
1639     unsigned int packet_len;
1640     uint8_t buf[4096];
1641     struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
1642 } NetSocketState;
1643
1644 typedef struct NetSocketListenState {
1645     VLANState *vlan;
1646     char *model;
1647     char *name;
1648     int fd;
1649 } NetSocketListenState;
1650
1651 /* XXX: we consider we can send the whole packet without blocking */
1652 static ssize_t net_socket_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1653 {
1654     NetSocketState *s = vc->opaque;
1655     uint32_t len;
1656     len = htonl(size);
1657
1658     send_all(s->fd, (const uint8_t *)&len, sizeof(len));
1659     return send_all(s->fd, buf, size);
1660 }
1661
1662 static ssize_t net_socket_receive_dgram(VLANClientState *vc, const uint8_t *buf, size_t size)
1663 {
1664     NetSocketState *s = vc->opaque;
1665
1666     return sendto(s->fd, (const void *)buf, size, 0,
1667                   (struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst));
1668 }
1669
1670 static void net_socket_send(void *opaque)
1671 {
1672     NetSocketState *s = opaque;
1673     int size, err;
1674     unsigned l;
1675     uint8_t buf1[4096];
1676     const uint8_t *buf;
1677
1678     size = recv(s->fd, (void *)buf1, sizeof(buf1), 0);
1679     if (size < 0) {
1680         err = socket_error();
1681         if (err != EWOULDBLOCK)
1682             goto eoc;
1683     } else if (size == 0) {
1684         /* end of connection */
1685     eoc:
1686         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1687         closesocket(s->fd);
1688         return;
1689     }
1690     buf = buf1;
1691     while (size > 0) {
1692         /* reassemble a packet from the network */
1693         switch(s->state) {
1694         case 0:
1695             l = 4 - s->index;
1696             if (l > size)
1697                 l = size;
1698             memcpy(s->buf + s->index, buf, l);
1699             buf += l;
1700             size -= l;
1701             s->index += l;
1702             if (s->index == 4) {
1703                 /* got length */
1704                 s->packet_len = ntohl(*(uint32_t *)s->buf);
1705                 s->index = 0;
1706                 s->state = 1;
1707             }
1708             break;
1709         case 1:
1710             l = s->packet_len - s->index;
1711             if (l > size)
1712                 l = size;
1713             if (s->index + l <= sizeof(s->buf)) {
1714                 memcpy(s->buf + s->index, buf, l);
1715             } else {
1716                 fprintf(stderr, "serious error: oversized packet received,"
1717                     "connection terminated.\n");
1718                 s->state = 0;
1719                 goto eoc;
1720             }
1721
1722             s->index += l;
1723             buf += l;
1724             size -= l;
1725             if (s->index >= s->packet_len) {
1726                 qemu_send_packet(s->vc, s->buf, s->packet_len);
1727                 s->index = 0;
1728                 s->state = 0;
1729             }
1730             break;
1731         }
1732     }
1733 }
1734
1735 static void net_socket_send_dgram(void *opaque)
1736 {
1737     NetSocketState *s = opaque;
1738     int size;
1739
1740     size = recv(s->fd, (void *)s->buf, sizeof(s->buf), 0);
1741     if (size < 0)
1742         return;
1743     if (size == 0) {
1744         /* end of connection */
1745         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1746         return;
1747     }
1748     qemu_send_packet(s->vc, s->buf, size);
1749 }
1750
1751 static int net_socket_mcast_create(struct sockaddr_in *mcastaddr)
1752 {
1753     struct ip_mreq imr;
1754     int fd;
1755     int val, ret;
1756     if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
1757         fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n",
1758                 inet_ntoa(mcastaddr->sin_addr),
1759                 (int)ntohl(mcastaddr->sin_addr.s_addr));
1760         return -1;
1761
1762     }
1763     fd = socket(PF_INET, SOCK_DGRAM, 0);
1764     if (fd < 0) {
1765         perror("socket(PF_INET, SOCK_DGRAM)");
1766         return -1;
1767     }
1768
1769     val = 1;
1770     ret=setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
1771                    (const char *)&val, sizeof(val));
1772     if (ret < 0) {
1773         perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
1774         goto fail;
1775     }
1776
1777     ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
1778     if (ret < 0) {
1779         perror("bind");
1780         goto fail;
1781     }
1782
1783     /* Add host to multicast group */
1784     imr.imr_multiaddr = mcastaddr->sin_addr;
1785     imr.imr_interface.s_addr = htonl(INADDR_ANY);
1786
1787     ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1788                      (const char *)&imr, sizeof(struct ip_mreq));
1789     if (ret < 0) {
1790         perror("setsockopt(IP_ADD_MEMBERSHIP)");
1791         goto fail;
1792     }
1793
1794     /* Force mcast msgs to loopback (eg. several QEMUs in same host */
1795     val = 1;
1796     ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1797                    (const char *)&val, sizeof(val));
1798     if (ret < 0) {
1799         perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
1800         goto fail;
1801     }
1802
1803     socket_set_nonblock(fd);
1804     return fd;
1805 fail:
1806     if (fd >= 0)
1807         closesocket(fd);
1808     return -1;
1809 }
1810
1811 static void net_socket_cleanup(VLANClientState *vc)
1812 {
1813     NetSocketState *s = vc->opaque;
1814     qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1815     close(s->fd);
1816     qemu_free(s);
1817 }
1818
1819 static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
1820                                                 const char *model,
1821                                                 const char *name,
1822                                                 int fd, int is_connected)
1823 {
1824     struct sockaddr_in saddr;
1825     int newfd;
1826     socklen_t saddr_len;
1827     NetSocketState *s;
1828
1829     /* fd passed: multicast: "learn" dgram_dst address from bound address and save it
1830      * Because this may be "shared" socket from a "master" process, datagrams would be recv()
1831      * by ONLY ONE process: we must "clone" this dgram socket --jjo
1832      */
1833
1834     if (is_connected) {
1835         if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
1836             /* must be bound */
1837             if (saddr.sin_addr.s_addr==0) {
1838                 fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, cannot setup multicast dst addr\n",
1839                         fd);
1840                 return NULL;
1841             }
1842             /* clone dgram socket */
1843             newfd = net_socket_mcast_create(&saddr);
1844             if (newfd < 0) {
1845                 /* error already reported by net_socket_mcast_create() */
1846                 close(fd);
1847                 return NULL;
1848             }
1849             /* clone newfd to fd, close newfd */
1850             dup2(newfd, fd);
1851             close(newfd);
1852
1853         } else {
1854             fprintf(stderr, "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
1855                     fd, strerror(errno));
1856             return NULL;
1857         }
1858     }
1859
1860     s = qemu_mallocz(sizeof(NetSocketState));
1861     s->fd = fd;
1862
1863     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, net_socket_receive_dgram,
1864                                  NULL, net_socket_cleanup, s);
1865     qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s);
1866
1867     /* mcast: save bound address as dst */
1868     if (is_connected) s->dgram_dst=saddr;
1869
1870     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1871             "socket: fd=%d (%s mcast=%s:%d)",
1872             fd, is_connected? "cloned" : "",
1873             inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1874     return s;
1875 }
1876
1877 static void net_socket_connect(void *opaque)
1878 {
1879     NetSocketState *s = opaque;
1880     qemu_set_fd_handler(s->fd, net_socket_send, NULL, s);
1881 }
1882
1883 static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
1884                                                  const char *model,
1885                                                  const char *name,
1886                                                  int fd, int is_connected)
1887 {
1888     NetSocketState *s;
1889     s = qemu_mallocz(sizeof(NetSocketState));
1890     s->fd = fd;
1891     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, net_socket_receive,
1892                                  NULL, net_socket_cleanup, s);
1893     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1894              "socket: fd=%d", fd);
1895     if (is_connected) {
1896         net_socket_connect(s);
1897     } else {
1898         qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
1899     }
1900     return s;
1901 }
1902
1903 static NetSocketState *net_socket_fd_init(VLANState *vlan,
1904                                           const char *model, const char *name,
1905                                           int fd, int is_connected)
1906 {
1907     int so_type=-1, optlen=sizeof(so_type);
1908
1909     if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type,
1910         (socklen_t *)&optlen)< 0) {
1911         fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n", fd);
1912         return NULL;
1913     }
1914     switch(so_type) {
1915     case SOCK_DGRAM:
1916         return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected);
1917     case SOCK_STREAM:
1918         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1919     default:
1920         /* who knows ... this could be a eg. a pty, do warn and continue as stream */
1921         fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
1922         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1923     }
1924     return NULL;
1925 }
1926
1927 static void net_socket_accept(void *opaque)
1928 {
1929     NetSocketListenState *s = opaque;
1930     NetSocketState *s1;
1931     struct sockaddr_in saddr;
1932     socklen_t len;
1933     int fd;
1934
1935     for(;;) {
1936         len = sizeof(saddr);
1937         fd = accept(s->fd, (struct sockaddr *)&saddr, &len);
1938         if (fd < 0 && errno != EINTR) {
1939             return;
1940         } else if (fd >= 0) {
1941             break;
1942         }
1943     }
1944     s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1);
1945     if (!s1) {
1946         closesocket(fd);
1947     } else {
1948         snprintf(s1->vc->info_str, sizeof(s1->vc->info_str),
1949                  "socket: connection from %s:%d",
1950                  inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1951     }
1952 }
1953
1954 static int net_socket_listen_init(VLANState *vlan,
1955                                   const char *model,
1956                                   const char *name,
1957                                   const char *host_str)
1958 {
1959     NetSocketListenState *s;
1960     int fd, val, ret;
1961     struct sockaddr_in saddr;
1962
1963     if (parse_host_port(&saddr, host_str) < 0)
1964         return -1;
1965
1966     s = qemu_mallocz(sizeof(NetSocketListenState));
1967
1968     fd = socket(PF_INET, SOCK_STREAM, 0);
1969     if (fd < 0) {
1970         perror("socket");
1971         return -1;
1972     }
1973     socket_set_nonblock(fd);
1974
1975     /* allow fast reuse */
1976     val = 1;
1977     setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));
1978
1979     ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
1980     if (ret < 0) {
1981         perror("bind");
1982         return -1;
1983     }
1984     ret = listen(fd, 0);
1985     if (ret < 0) {
1986         perror("listen");
1987         return -1;
1988     }
1989     s->vlan = vlan;
1990     s->model = strdup(model);
1991     s->name = name ? strdup(name) : NULL;
1992     s->fd = fd;
1993     qemu_set_fd_handler(fd, net_socket_accept, NULL, s);
1994     return 0;
1995 }
1996
1997 static int net_socket_connect_init(VLANState *vlan,
1998                                    const char *model,
1999                                    const char *name,
2000                                    const char *host_str)
2001 {
2002     NetSocketState *s;
2003     int fd, connected, ret, err;
2004     struct sockaddr_in saddr;
2005
2006     if (parse_host_port(&saddr, host_str) < 0)
2007         return -1;
2008
2009     fd = socket(PF_INET, SOCK_STREAM, 0);
2010     if (fd < 0) {
2011         perror("socket");
2012         return -1;
2013     }
2014     socket_set_nonblock(fd);
2015
2016     connected = 0;
2017     for(;;) {
2018         ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
2019         if (ret < 0) {
2020             err = socket_error();
2021             if (err == EINTR || err == EWOULDBLOCK) {
2022             } else if (err == EINPROGRESS) {
2023                 break;
2024 #ifdef _WIN32
2025             } else if (err == WSAEALREADY) {
2026                 break;
2027 #endif
2028             } else {
2029                 perror("connect");
2030                 closesocket(fd);
2031                 return -1;
2032             }
2033         } else {
2034             connected = 1;
2035             break;
2036         }
2037     }
2038     s = net_socket_fd_init(vlan, model, name, fd, connected);
2039     if (!s)
2040         return -1;
2041     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2042              "socket: connect to %s:%d",
2043              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2044     return 0;
2045 }
2046
2047 static int net_socket_mcast_init(VLANState *vlan,
2048                                  const char *model,
2049                                  const char *name,
2050                                  const char *host_str)
2051 {
2052     NetSocketState *s;
2053     int fd;
2054     struct sockaddr_in saddr;
2055
2056     if (parse_host_port(&saddr, host_str) < 0)
2057         return -1;
2058
2059
2060     fd = net_socket_mcast_create(&saddr);
2061     if (fd < 0)
2062         return -1;
2063
2064     s = net_socket_fd_init(vlan, model, name, fd, 0);
2065     if (!s)
2066         return -1;
2067
2068     s->dgram_dst = saddr;
2069
2070     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2071              "socket: mcast=%s:%d",
2072              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2073     return 0;
2074
2075 }
2076
2077 typedef struct DumpState {
2078     VLANClientState *pcap_vc;
2079     int fd;
2080     int pcap_caplen;
2081 } DumpState;
2082
2083 #define PCAP_MAGIC 0xa1b2c3d4
2084
2085 struct pcap_file_hdr {
2086     uint32_t magic;
2087     uint16_t version_major;
2088     uint16_t version_minor;
2089     int32_t thiszone;
2090     uint32_t sigfigs;
2091     uint32_t snaplen;
2092     uint32_t linktype;
2093 };
2094
2095 struct pcap_sf_pkthdr {
2096     struct {
2097         int32_t tv_sec;
2098         int32_t tv_usec;
2099     } ts;
2100     uint32_t caplen;
2101     uint32_t len;
2102 };
2103
2104 static ssize_t dump_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
2105 {
2106     DumpState *s = vc->opaque;
2107     struct pcap_sf_pkthdr hdr;
2108     int64_t ts;
2109     int caplen;
2110
2111     /* Early return in case of previous error. */
2112     if (s->fd < 0) {
2113         return size;
2114     }
2115
2116     ts = muldiv64(qemu_get_clock(vm_clock), 1000000, ticks_per_sec);
2117     caplen = size > s->pcap_caplen ? s->pcap_caplen : size;
2118
2119     hdr.ts.tv_sec = ts / 1000000;
2120     hdr.ts.tv_usec = ts % 1000000;
2121     hdr.caplen = caplen;
2122     hdr.len = size;
2123     if (write(s->fd, &hdr, sizeof(hdr)) != sizeof(hdr) ||
2124         write(s->fd, buf, caplen) != caplen) {
2125         qemu_log("-net dump write error - stop dump\n");
2126         close(s->fd);
2127         s->fd = -1;
2128     }
2129
2130     return size;
2131 }
2132
2133 static void net_dump_cleanup(VLANClientState *vc)
2134 {
2135     DumpState *s = vc->opaque;
2136
2137     close(s->fd);
2138     qemu_free(s);
2139 }
2140
2141 static int net_dump_init(Monitor *mon, VLANState *vlan, const char *device,
2142                          const char *name, const char *filename, int len)
2143 {
2144     struct pcap_file_hdr hdr;
2145     DumpState *s;
2146
2147     s = qemu_malloc(sizeof(DumpState));
2148
2149     s->fd = open(filename, O_CREAT | O_WRONLY, 0644);
2150     if (s->fd < 0) {
2151         config_error(mon, "-net dump: can't open %s\n", filename);
2152         return -1;
2153     }
2154
2155     s->pcap_caplen = len;
2156
2157     hdr.magic = PCAP_MAGIC;
2158     hdr.version_major = 2;
2159     hdr.version_minor = 4;
2160     hdr.thiszone = 0;
2161     hdr.sigfigs = 0;
2162     hdr.snaplen = s->pcap_caplen;
2163     hdr.linktype = 1;
2164
2165     if (write(s->fd, &hdr, sizeof(hdr)) < sizeof(hdr)) {
2166         config_error(mon, "-net dump write error: %s\n", strerror(errno));
2167         close(s->fd);
2168         qemu_free(s);
2169         return -1;
2170     }
2171
2172     s->pcap_vc = qemu_new_vlan_client(vlan, device, name, NULL, dump_receive, NULL,
2173                                       net_dump_cleanup, s);
2174     snprintf(s->pcap_vc->info_str, sizeof(s->pcap_vc->info_str),
2175              "dump to %s (len=%d)", filename, len);
2176     return 0;
2177 }
2178
2179 /* find or alloc a new VLAN */
2180 VLANState *qemu_find_vlan(int id)
2181 {
2182     VLANState **pvlan, *vlan;
2183     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2184         if (vlan->id == id)
2185             return vlan;
2186     }
2187     vlan = qemu_mallocz(sizeof(VLANState));
2188     vlan->id = id;
2189     vlan->next = NULL;
2190     pvlan = &first_vlan;
2191     while (*pvlan != NULL)
2192         pvlan = &(*pvlan)->next;
2193     *pvlan = vlan;
2194     return vlan;
2195 }
2196
2197 static int nic_get_free_idx(void)
2198 {
2199     int index;
2200
2201     for (index = 0; index < MAX_NICS; index++)
2202         if (!nd_table[index].used)
2203             return index;
2204     return -1;
2205 }
2206
2207 void qemu_check_nic_model(NICInfo *nd, const char *model)
2208 {
2209     const char *models[2];
2210
2211     models[0] = model;
2212     models[1] = NULL;
2213
2214     qemu_check_nic_model_list(nd, models, model);
2215 }
2216
2217 void qemu_check_nic_model_list(NICInfo *nd, const char * const *models,
2218                                const char *default_model)
2219 {
2220     int i, exit_status = 0;
2221
2222     if (!nd->model)
2223         nd->model = strdup(default_model);
2224
2225     if (strcmp(nd->model, "?") != 0) {
2226         for (i = 0 ; models[i]; i++)
2227             if (strcmp(nd->model, models[i]) == 0)
2228                 return;
2229
2230         fprintf(stderr, "qemu: Unsupported NIC model: %s\n", nd->model);
2231         exit_status = 1;
2232     }
2233
2234     fprintf(stderr, "qemu: Supported NIC models: ");
2235     for (i = 0 ; models[i]; i++)
2236         fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
2237
2238     exit(exit_status);
2239 }
2240
2241 int net_client_init(Monitor *mon, const char *device, const char *p)
2242 {
2243     static const char * const fd_params[] = {
2244         "vlan", "name", "fd", NULL
2245     };
2246     char buf[1024];
2247     int vlan_id, ret;
2248     VLANState *vlan;
2249     char *name = NULL;
2250
2251     vlan_id = 0;
2252     if (get_param_value(buf, sizeof(buf), "vlan", p)) {
2253         vlan_id = strtol(buf, NULL, 0);
2254     }
2255     vlan = qemu_find_vlan(vlan_id);
2256
2257     if (get_param_value(buf, sizeof(buf), "name", p)) {
2258         name = qemu_strdup(buf);
2259     }
2260     if (!strcmp(device, "nic")) {
2261         static const char * const nic_params[] = {
2262             "vlan", "name", "macaddr", "model", NULL
2263         };
2264         NICInfo *nd;
2265         uint8_t *macaddr;
2266         int idx = nic_get_free_idx();
2267
2268         if (check_params(buf, sizeof(buf), nic_params, p) < 0) {
2269             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2270             ret = -1;
2271             goto out;
2272         }
2273         if (idx == -1 || nb_nics >= MAX_NICS) {
2274             config_error(mon, "Too Many NICs\n");
2275             ret = -1;
2276             goto out;
2277         }
2278         nd = &nd_table[idx];
2279         macaddr = nd->macaddr;
2280         macaddr[0] = 0x52;
2281         macaddr[1] = 0x54;
2282         macaddr[2] = 0x00;
2283         macaddr[3] = 0x12;
2284         macaddr[4] = 0x34;
2285         macaddr[5] = 0x56 + idx;
2286
2287         if (get_param_value(buf, sizeof(buf), "macaddr", p)) {
2288             if (parse_macaddr(macaddr, buf) < 0) {
2289                 config_error(mon, "invalid syntax for ethernet address\n");
2290                 ret = -1;
2291                 goto out;
2292             }
2293         }
2294         if (get_param_value(buf, sizeof(buf), "model", p)) {
2295             nd->model = strdup(buf);
2296         }
2297         nd->vlan = vlan;
2298         nd->name = name;
2299         nd->used = 1;
2300         name = NULL;
2301         nb_nics++;
2302         vlan->nb_guest_devs++;
2303         ret = idx;
2304     } else
2305     if (!strcmp(device, "none")) {
2306         if (*p != '\0') {
2307             config_error(mon, "'none' takes no parameters\n");
2308             ret = -1;
2309             goto out;
2310         }
2311         /* does nothing. It is needed to signal that no network cards
2312            are wanted */
2313         ret = 0;
2314     } else
2315 #ifdef CONFIG_SLIRP
2316     if (!strcmp(device, "user")) {
2317         static const char * const slirp_params[] = {
2318             "vlan", "name", "hostname", "restrict", "ip", NULL
2319         };
2320         int restricted = 0;
2321         char *ip = NULL;
2322
2323         if (check_params(buf, sizeof(buf), slirp_params, p) < 0) {
2324             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2325             ret = -1;
2326             goto out;
2327         }
2328         if (get_param_value(buf, sizeof(buf), "hostname", p)) {
2329             pstrcpy(slirp_hostname, sizeof(slirp_hostname), buf);
2330         }
2331         if (get_param_value(buf, sizeof(buf), "restrict", p)) {
2332             restricted = (buf[0] == 'y') ? 1 : 0;
2333         }
2334         if (get_param_value(buf, sizeof(buf), "ip", p)) {
2335             ip = qemu_strdup(buf);
2336         }
2337         vlan->nb_host_devs++;
2338         ret = net_slirp_init(vlan, device, name, restricted, ip);
2339         qemu_free(ip);
2340     } else if (!strcmp(device, "channel")) {
2341         long port;
2342         char name[20], *devname;
2343         struct VMChannel *vmc;
2344
2345         port = strtol(p, &devname, 10);
2346         devname++;
2347         if (port < 1 || port > 65535) {
2348             config_error(mon, "vmchannel wrong port number\n");
2349             ret = -1;
2350             goto out;
2351         }
2352         vmc = malloc(sizeof(struct VMChannel));
2353         snprintf(name, 20, "vmchannel%ld", port);
2354         vmc->hd = qemu_chr_open(name, devname, NULL);
2355         if (!vmc->hd) {
2356             config_error(mon, "could not open vmchannel device '%s'\n",
2357                          devname);
2358             ret = -1;
2359             goto out;
2360         }
2361         vmc->port = port;
2362         slirp_add_exec(3, vmc->hd, 4, port);
2363         qemu_chr_add_handlers(vmc->hd, vmchannel_can_read, vmchannel_read,
2364                 NULL, vmc);
2365         ret = 0;
2366     } else
2367 #endif
2368 #ifdef _WIN32
2369     if (!strcmp(device, "tap")) {
2370         static const char * const tap_params[] = {
2371             "vlan", "name", "ifname", NULL
2372         };
2373         char ifname[64];
2374
2375         if (check_params(buf, sizeof(buf), tap_params, p) < 0) {
2376             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2377             ret = -1;
2378             goto out;
2379         }
2380         if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
2381             config_error(mon, "tap: no interface name\n");
2382             ret = -1;
2383             goto out;
2384         }
2385         vlan->nb_host_devs++;
2386         ret = tap_win32_init(vlan, device, name, ifname);
2387     } else
2388 #elif defined (_AIX)
2389 #else
2390     if (!strcmp(device, "tap")) {
2391         char ifname[64], chkbuf[64];
2392         char setup_script[1024], down_script[1024];
2393         int fd;
2394         vlan->nb_host_devs++;
2395         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
2396             if (check_params(chkbuf, sizeof(chkbuf), fd_params, p) < 0) {
2397                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2398                 ret = -1;
2399                 goto out;
2400             }
2401             fd = strtol(buf, NULL, 0);
2402             fcntl(fd, F_SETFL, O_NONBLOCK);
2403             net_tap_fd_init(vlan, device, name, fd, tap_probe_vnet_hdr(fd));
2404             ret = 0;
2405         } else {
2406             static const char * const tap_params[] = {
2407                 "vlan", "name", "ifname", "script", "downscript", NULL
2408             };
2409             if (check_params(chkbuf, sizeof(chkbuf), tap_params, p) < 0) {
2410                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2411                 ret = -1;
2412                 goto out;
2413             }
2414             if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
2415                 ifname[0] = '\0';
2416             }
2417             if (get_param_value(setup_script, sizeof(setup_script), "script", p) == 0) {
2418                 pstrcpy(setup_script, sizeof(setup_script), DEFAULT_NETWORK_SCRIPT);
2419             }
2420             if (get_param_value(down_script, sizeof(down_script), "downscript", p) == 0) {
2421                 pstrcpy(down_script, sizeof(down_script), DEFAULT_NETWORK_DOWN_SCRIPT);
2422             }
2423             ret = net_tap_init(vlan, device, name, ifname, setup_script, down_script);
2424         }
2425     } else
2426 #endif
2427     if (!strcmp(device, "socket")) {
2428         char chkbuf[64];
2429         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
2430             int fd;
2431             if (check_params(chkbuf, sizeof(chkbuf), fd_params, p) < 0) {
2432                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2433                 ret = -1;
2434                 goto out;
2435             }
2436             fd = strtol(buf, NULL, 0);
2437             ret = -1;
2438             if (net_socket_fd_init(vlan, device, name, fd, 1))
2439                 ret = 0;
2440         } else if (get_param_value(buf, sizeof(buf), "listen", p) > 0) {
2441             static const char * const listen_params[] = {
2442                 "vlan", "name", "listen", NULL
2443             };
2444             if (check_params(chkbuf, sizeof(chkbuf), listen_params, p) < 0) {
2445                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2446                 ret = -1;
2447                 goto out;
2448             }
2449             ret = net_socket_listen_init(vlan, device, name, buf);
2450         } else if (get_param_value(buf, sizeof(buf), "connect", p) > 0) {
2451             static const char * const connect_params[] = {
2452                 "vlan", "name", "connect", NULL
2453             };
2454             if (check_params(chkbuf, sizeof(chkbuf), connect_params, p) < 0) {
2455                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2456                 ret = -1;
2457                 goto out;
2458             }
2459             ret = net_socket_connect_init(vlan, device, name, buf);
2460         } else if (get_param_value(buf, sizeof(buf), "mcast", p) > 0) {
2461             static const char * const mcast_params[] = {
2462                 "vlan", "name", "mcast", NULL
2463             };
2464             if (check_params(chkbuf, sizeof(chkbuf), mcast_params, p) < 0) {
2465                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2466                 ret = -1;
2467                 goto out;
2468             }
2469             ret = net_socket_mcast_init(vlan, device, name, buf);
2470         } else {
2471             config_error(mon, "Unknown socket options: %s\n", p);
2472             ret = -1;
2473             goto out;
2474         }
2475         vlan->nb_host_devs++;
2476     } else
2477 #ifdef CONFIG_VDE
2478     if (!strcmp(device, "vde")) {
2479         static const char * const vde_params[] = {
2480             "vlan", "name", "sock", "port", "group", "mode", NULL
2481         };
2482         char vde_sock[1024], vde_group[512];
2483         int vde_port, vde_mode;
2484
2485         if (check_params(buf, sizeof(buf), vde_params, p) < 0) {
2486             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2487             ret = -1;
2488             goto out;
2489         }
2490         vlan->nb_host_devs++;
2491         if (get_param_value(vde_sock, sizeof(vde_sock), "sock", p) <= 0) {
2492             vde_sock[0] = '\0';
2493         }
2494         if (get_param_value(buf, sizeof(buf), "port", p) > 0) {
2495             vde_port = strtol(buf, NULL, 10);
2496         } else {
2497             vde_port = 0;
2498         }
2499         if (get_param_value(vde_group, sizeof(vde_group), "group", p) <= 0) {
2500             vde_group[0] = '\0';
2501         }
2502         if (get_param_value(buf, sizeof(buf), "mode", p) > 0) {
2503             vde_mode = strtol(buf, NULL, 8);
2504         } else {
2505             vde_mode = 0700;
2506         }
2507         ret = net_vde_init(vlan, device, name, vde_sock, vde_port, vde_group, vde_mode);
2508     } else
2509 #endif
2510     if (!strcmp(device, "dump")) {
2511         int len = 65536;
2512
2513         if (get_param_value(buf, sizeof(buf), "len", p) > 0) {
2514             len = strtol(buf, NULL, 0);
2515         }
2516         if (!get_param_value(buf, sizeof(buf), "file", p)) {
2517             snprintf(buf, sizeof(buf), "qemu-vlan%d.pcap", vlan_id);
2518         }
2519         ret = net_dump_init(mon, vlan, device, name, buf, len);
2520     } else {
2521         config_error(mon, "Unknown network device: %s\n", device);
2522         ret = -1;
2523         goto out;
2524     }
2525     if (ret < 0) {
2526         config_error(mon, "Could not initialize device '%s'\n", device);
2527     }
2528 out:
2529     qemu_free(name);
2530     return ret;
2531 }
2532
2533 void net_client_uninit(NICInfo *nd)
2534 {
2535     nd->vlan->nb_guest_devs--;
2536     nb_nics--;
2537     nd->used = 0;
2538     free((void *)nd->model);
2539 }
2540
2541 static int net_host_check_device(const char *device)
2542 {
2543     int i;
2544     const char *valid_param_list[] = { "tap", "socket", "dump"
2545 #ifdef CONFIG_SLIRP
2546                                        ,"user"
2547 #endif
2548 #ifdef CONFIG_VDE
2549                                        ,"vde"
2550 #endif
2551     };
2552     for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) {
2553         if (!strncmp(valid_param_list[i], device,
2554                      strlen(valid_param_list[i])))
2555             return 1;
2556     }
2557
2558     return 0;
2559 }
2560
2561 void net_host_device_add(Monitor *mon, const char *device, const char *opts)
2562 {
2563     if (!net_host_check_device(device)) {
2564         monitor_printf(mon, "invalid host network device %s\n", device);
2565         return;
2566     }
2567     if (net_client_init(mon, device, opts ? opts : "") < 0) {
2568         monitor_printf(mon, "adding host network device %s failed\n", device);
2569     }
2570 }
2571
2572 void net_host_device_remove(Monitor *mon, int vlan_id, const char *device)
2573 {
2574     VLANState *vlan;
2575     VLANClientState *vc;
2576
2577     vlan = qemu_find_vlan(vlan_id);
2578
2579     for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
2580         if (!strcmp(vc->name, device)) {
2581             break;
2582         }
2583     }
2584
2585     if (!vc) {
2586         monitor_printf(mon, "can't find device %s\n", device);
2587         return;
2588     }
2589     if (!net_host_check_device(vc->model)) {
2590         monitor_printf(mon, "invalid host network device %s\n", device);
2591         return;
2592     }
2593     qemu_del_vlan_client(vc);
2594 }
2595
2596 int net_client_parse(const char *str)
2597 {
2598     const char *p;
2599     char *q;
2600     char device[64];
2601
2602     p = str;
2603     q = device;
2604     while (*p != '\0' && *p != ',') {
2605         if ((q - device) < sizeof(device) - 1)
2606             *q++ = *p;
2607         p++;
2608     }
2609     *q = '\0';
2610     if (*p == ',')
2611         p++;
2612
2613     return net_client_init(NULL, device, p);
2614 }
2615
2616 void do_info_network(Monitor *mon)
2617 {
2618     VLANState *vlan;
2619     VLANClientState *vc;
2620
2621     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2622         monitor_printf(mon, "VLAN %d devices:\n", vlan->id);
2623         for(vc = vlan->first_client; vc != NULL; vc = vc->next)
2624             monitor_printf(mon, "  %s: %s\n", vc->name, vc->info_str);
2625     }
2626 }
2627
2628 int do_set_link(Monitor *mon, const char *name, const char *up_or_down)
2629 {
2630     VLANState *vlan;
2631     VLANClientState *vc = NULL;
2632
2633     for (vlan = first_vlan; vlan != NULL; vlan = vlan->next)
2634         for (vc = vlan->first_client; vc != NULL; vc = vc->next)
2635             if (strcmp(vc->name, name) == 0)
2636                 goto done;
2637 done:
2638
2639     if (!vc) {
2640         monitor_printf(mon, "could not find network device '%s'", name);
2641         return 0;
2642     }
2643
2644     if (strcmp(up_or_down, "up") == 0)
2645         vc->link_down = 0;
2646     else if (strcmp(up_or_down, "down") == 0)
2647         vc->link_down = 1;
2648     else
2649         monitor_printf(mon, "invalid link status '%s'; only 'up' or 'down' "
2650                        "valid\n", up_or_down);
2651
2652     if (vc->link_status_changed)
2653         vc->link_status_changed(vc);
2654
2655     return 1;
2656 }
2657
2658 void net_cleanup(void)
2659 {
2660     VLANState *vlan;
2661
2662     /* close network clients */
2663     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2664         VLANClientState *vc = vlan->first_client;
2665
2666         while (vc) {
2667             VLANClientState *next = vc->next;
2668
2669             qemu_del_vlan_client(vc);
2670
2671             vc = next;
2672         }
2673     }
2674 }
2675
2676 void net_client_check(void)
2677 {
2678     VLANState *vlan;
2679
2680     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2681         if (vlan->nb_guest_devs == 0 && vlan->nb_host_devs == 0)
2682             continue;
2683         if (vlan->nb_guest_devs == 0)
2684             fprintf(stderr, "Warning: vlan %d with no nics\n", vlan->id);
2685         if (vlan->nb_host_devs == 0)
2686             fprintf(stderr,
2687                     "Warning: vlan %d is not connected to host network\n",
2688                     vlan->id);
2689     }
2690 }