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 "qemu-common.h"
  25 #include "net.h"
  26 #include "console.h"
  27 #include "sysemu.h"
  28 #include "qemu-timer.h"
  29 #include "qemu-char.h"
  30 #include "audio/audio.h"
  31
  32 #include <unistd.h>
  33 #include <fcntl.h>
  34 #include <signal.h>
  35 #include <time.h>
  36 #include <errno.h>
  37 #include <sys/time.h>
  38 #include <zlib.h>
  39
  40 #ifndef _WIN32
  41 #include <sys/times.h>
  42 #include <sys/wait.h>
  43 #include <termios.h>
  44 #include <sys/mman.h>
  45 #include <sys/ioctl.h>
  46 #include <sys/resource.h>
  47 #include <sys/socket.h>
  48 #include <netinet/in.h>
  49 #include <net/if.h>
  50 #ifdef __NetBSD__
  51 #include <net/if_tap.h>
  52 #endif
  53 #ifdef __linux__
  54 #include <linux/if_tun.h>
  55 #endif
  56 #include <arpa/inet.h>
  57 #include <dirent.h>
  58 #include <netdb.h>
  59 #include <sys/select.h>
  60 #ifdef _BSD
  61 #include <sys/stat.h>
  62 #ifdef __FreeBSD__
  63 #include <libutil.h>
  64 #else
  65 #include <util.h>
  66 #endif
  67 #elif defined (__GLIBC__) && defined (__FreeBSD_kernel__)
  68 #include <freebsd/stdlib.h>
  69 #else
  70 #ifdef __linux__
  71 #include <pty.h>
  72 #include <malloc.h>
  73 #include <linux/rtc.h>
  74
  75 /* For the benefit of older linux systems which don't supply it,
  76    we use a local copy of hpet.h. */
  77 /* #include <linux/hpet.h> */
  78 #include "hpet.h"
  79
  80 #include <linux/ppdev.h>
  81 #include <linux/parport.h>
  82 #endif
  83 #ifdef __sun__
  84 #include <sys/stat.h>
  85 #include <sys/ethernet.h>
  86 #include <sys/sockio.h>
  87 #include <netinet/arp.h>
  88 #include <netinet/in.h>
  89 #include <netinet/in_systm.h>
  90 #include <netinet/ip.h>
  91 #include <netinet/ip_icmp.h> // must come after ip.h
  92 #include <netinet/udp.h>
  93 #include <netinet/tcp.h>
  94 #include <net/if.h>
  95 #include <syslog.h>
  96 #include <stropts.h>
  97 #endif
  98 #endif
  99 #endif
 100
 101 #include "qemu_socket.h"
 102
 103 #if defined(CONFIG_SLIRP)
 104 #include "libslirp.h"
 105 #endif
 106
 107 #if defined(__OpenBSD__)
 108 #include <util.h>
 109 #endif
 110
 111 #if defined(CONFIG_VDE)
 112 #include <libvdeplug.h>
 113 #endif
 114
 115 #ifdef _WIN32
 116 #include <malloc.h>
 117 #include <sys/timeb.h>
 118 #include <mmsystem.h>
 119 #define getopt_long_only getopt_long
 120 #define memalign(align, size) malloc(size)
 121 #endif
 122
 123 static VLANState *first_vlan;
 124
 125 /***********************************************************/
 126 /* network device redirectors */
 127
 128 #if defined(DEBUG_NET) || defined(DEBUG_SLIRP)
 129 static void hex_dump(FILE *f, const uint8_t *buf, int size)
 130 {
 131     int len, i, j, c;
 132
 133     for(i=0;i<size;i+=16) {
 134         len = size - i;
 135         if (len > 16)
 136             len = 16;
 137         fprintf(f, "%08x ", i);
 138         for(j=0;j<16;j++) {
 139             if (j < len)
 140                 fprintf(f, " %02x", buf[i+j]);
 141             else
 142                 fprintf(f, "   ");
 143         }
 144         fprintf(f, " ");
 145         for(j=0;j<len;j++) {
 146             c = buf[i+j];
 147             if (c < ' ' || c > '~')
 148                 c = '.';
 149             fprintf(f, "%c", c);
 150         }
 151         fprintf(f, "\n");
 152     }
 153 }
 154 #endif
 155
 156 static int parse_macaddr(uint8_t *macaddr, const char *p)
 157 {
 158     int i;
 159     char *last_char;
 160     long int offset;
 161
 162     errno = 0;
 163     offset = strtol(p, &last_char, 0);
 164     if (0 == errno && '\0' == *last_char &&
 165             offset >= 0 && offset <= 0xFFFFFF) {
 166         macaddr[3] = (offset & 0xFF0000) >> 16;
 167         macaddr[4] = (offset & 0xFF00) >> 8;
 168         macaddr[5] = offset & 0xFF;
 169         return 0;
 170     } else {
 171         for(i = 0; i < 6; i++) {
 172             macaddr[i] = strtol(p, (char **)&p, 16);
 173             if (i == 5) {
 174                 if (*p != '\0')
 175                     return -1;
 176             } else {
 177                 if (*p != ':' && *p != '-')
 178                     return -1;
 179                 p++;
 180             }
 181         }
 182         return 0;
 183     }
 184
 185     return -1;
 186 }
 187
 188 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
 189 {
 190     const char *p, *p1;
 191     int len;
 192     p = *pp;
 193     p1 = strchr(p, sep);
 194     if (!p1)
 195         return -1;
 196     len = p1 - p;
 197     p1++;
 198     if (buf_size > 0) {
 199         if (len > buf_size - 1)
 200             len = buf_size - 1;
 201         memcpy(buf, p, len);
 202         buf[len] = '\0';
 203     }
 204     *pp = p1;
 205     return 0;
 206 }
 207
 208 int parse_host_src_port(struct sockaddr_in *haddr,
 209                         struct sockaddr_in *saddr,
 210                         const char *input_str)
 211 {
 212     char *str = strdup(input_str);
 213     char *host_str = str;
 214     char *src_str;
 215     const char *src_str2;
 216     char *ptr;
 217
 218     /*
 219      * Chop off any extra arguments at the end of the string which
 220      * would start with a comma, then fill in the src port information
 221      * if it was provided else use the "any address" and "any port".
 222      */
 223     if ((ptr = strchr(str,',')))
 224         *ptr = '\0';
 225
 226     if ((src_str = strchr(input_str,'@'))) {
 227         *src_str = '\0';
 228         src_str++;
 229     }
 230
 231     if (parse_host_port(haddr, host_str) < 0)
 232         goto fail;
 233
 234     src_str2 = src_str;
 235     if (!src_str || *src_str == '\0')
 236         src_str2 = ":0";
 237
 238     if (parse_host_port(saddr, src_str2) < 0)
 239         goto fail;
 240
 241     free(str);
 242     return(0);
 243
 244 fail:
 245     free(str);
 246     return -1;
 247 }
 248
 249 int parse_host_port(struct sockaddr_in *saddr, const char *str)
 250 {
 251     char buf[512];
 252     struct hostent *he;
 253     const char *p, *r;
 254     int port;
 255
 256     p = str;
 257     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 258         return -1;
 259     saddr->sin_family = AF_INET;
 260     if (buf[0] == '\0') {
 261         saddr->sin_addr.s_addr = 0;
 262     } else {
 263         if (qemu_isdigit(buf[0])) {
 264             if (!inet_aton(buf, &saddr->sin_addr))
 265                 return -1;
 266         } else {
 267             if ((he = gethostbyname(buf)) == NULL)
 268                 return - 1;
 269             saddr->sin_addr = *(struct in_addr *)he->h_addr;
 270         }
 271     }
 272     port = strtol(p, (char **)&r, 0);
 273     if (r == p)
 274         return -1;
 275     saddr->sin_port = htons(port);
 276     return 0;
 277 }
 278
 279 #if !defined(_WIN32) && 0
 280 static int parse_unix_path(struct sockaddr_un *uaddr, const char *str)
 281 {
 282     const char *p;
 283     int len;
 284
 285     len = MIN(108, strlen(str));
 286     p = strchr(str, ',');
 287     if (p)
 288         len = MIN(len, p - str);
 289
 290     memset(uaddr, 0, sizeof(*uaddr));
 291
 292     uaddr->sun_family = AF_UNIX;
 293     memcpy(uaddr->sun_path, str, len);
 294
 295     return 0;
 296 }
 297 #endif
 298
 299 void qemu_format_nic_info_str(VLANClientState *vc, uint8_t macaddr[6])
 300 {
 301     snprintf(vc->info_str, sizeof(vc->info_str),
 302              "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x",
 303              vc->model,
 304              macaddr[0], macaddr[1], macaddr[2],
 305              macaddr[3], macaddr[4], macaddr[5]);
 306 }
 307
 308 static char *assign_name(VLANClientState *vc1, const char *model)
 309 {
 310     VLANState *vlan;
 311     char buf[256];
 312     int id = 0;
 313
 314     for (vlan = first_vlan; vlan; vlan = vlan->next) {
 315         VLANClientState *vc;
 316
 317         for (vc = vlan->first_client; vc; vc = vc->next)
 318             if (vc != vc1 && strcmp(vc->model, model) == 0)
 319                 id++;
 320     }
 321
 322     snprintf(buf, sizeof(buf), "%s.%d", model, id);
 323
 324     return strdup(buf);
 325 }
 326
 327 VLANClientState *qemu_new_vlan_client(VLANState *vlan,
 328                                       const char *model,
 329                                       const char *name,
 330                                       IOReadHandler *fd_read,
 331                                       IOCanRWHandler *fd_can_read,
 332                                       void *opaque)
 333 {
 334     VLANClientState *vc, **pvc;
 335     vc = qemu_mallocz(sizeof(VLANClientState));
 336     if (!vc)
 337         return NULL;
 338     vc->model = strdup(model);
 339     if (name)
 340         vc->name = strdup(name);
 341     else
 342         vc->name = assign_name(vc, model);
 343     vc->fd_read = fd_read;
 344     vc->fd_can_read = fd_can_read;
 345     vc->opaque = opaque;
 346     vc->vlan = vlan;
 347
 348     vc->next = NULL;
 349     pvc = &vlan->first_client;
 350     while (*pvc != NULL)
 351         pvc = &(*pvc)->next;
 352     *pvc = vc;
 353     return vc;
 354 }
 355
 356 void qemu_del_vlan_client(VLANClientState *vc)
 357 {
 358     VLANClientState **pvc = &vc->vlan->first_client;
 359
 360     while (*pvc != NULL)
 361         if (*pvc == vc) {
 362             *pvc = vc->next;
 363             free(vc->name);
 364             free(vc->model);
 365             free(vc);
 366             break;
 367         } else
 368             pvc = &(*pvc)->next;
 369 }
 370
 371 int qemu_can_send_packet(VLANClientState *vc1)
 372 {
 373     VLANState *vlan = vc1->vlan;
 374     VLANClientState *vc;
 375
 376     for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
 377         if (vc != vc1) {
 378             if (vc->fd_can_read && vc->fd_can_read(vc->opaque))
 379                 return 1;
 380         }
 381     }
 382     return 0;
 383 }
 384
 385 void qemu_send_packet(VLANClientState *vc1, const uint8_t *buf, int size)
 386 {
 387     VLANState *vlan = vc1->vlan;
 388     VLANClientState *vc;
 389
 390 #ifdef DEBUG_NET
 391     printf("vlan %d send:\n", vlan->id);
 392     hex_dump(stdout, buf, size);
 393 #endif
 394     for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
 395         if (vc != vc1) {
 396             vc->fd_read(vc->opaque, buf, size);
 397         }
 398     }
 399 }
 400
 401 static ssize_t vc_sendv_compat(VLANClientState *vc, const struct iovec *iov,
 402                                int iovcnt)
 403 {
 404     uint8_t buffer[4096];
 405     size_t offset = 0;
 406     int i;
 407
 408     for (i = 0; i < iovcnt; i++) {
 409         size_t len;
 410
 411         len = MIN(sizeof(buffer) - offset, iov[i].iov_len);
 412         memcpy(buffer + offset, iov[i].iov_base, len);
 413         offset += len;
 414     }
 415
 416     vc->fd_read(vc->opaque, buffer, offset);
 417
 418     return offset;
 419 }
 420
 421 ssize_t qemu_sendv_packet(VLANClientState *vc1, const struct iovec *iov,
 422                           int iovcnt)
 423 {
 424     VLANState *vlan = vc1->vlan;
 425     VLANClientState *vc;
 426     ssize_t max_len = 0;
 427
 428     for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
 429         ssize_t len = 0;
 430
 431         if (vc == vc1)
 432             continue;
 433
 434         if (vc->fd_readv)
 435             len = vc->fd_readv(vc->opaque, iov, iovcnt);
 436         else if (vc->fd_read)
 437             len = vc_sendv_compat(vc, iov, iovcnt);
 438
 439         max_len = MAX(max_len, len);
 440     }
 441
 442     return max_len;
 443 }
 444
 445 #if defined(CONFIG_SLIRP)
 446
 447 /* slirp network adapter */
 448
 449 static int slirp_inited;
 450 static VLANClientState *slirp_vc;
 451
 452 int slirp_can_output(void)
 453 {
 454     return !slirp_vc || qemu_can_send_packet(slirp_vc);
 455 }
 456
 457 void slirp_output(const uint8_t *pkt, int pkt_len)
 458 {
 459 #ifdef DEBUG_SLIRP
 460     printf("slirp output:\n");
 461     hex_dump(stdout, pkt, pkt_len);
 462 #endif
 463     if (!slirp_vc)
 464         return;
 465     qemu_send_packet(slirp_vc, pkt, pkt_len);
 466 }
 467
 468 int slirp_is_inited(void)
 469 {
 470     return slirp_inited;
 471 }
 472
 473 static void slirp_receive(void *opaque, const uint8_t *buf, int size)
 474 {
 475 #ifdef DEBUG_SLIRP
 476     printf("slirp input:\n");
 477     hex_dump(stdout, buf, size);
 478 #endif
 479     slirp_input(buf, size);
 480 }
 481
 482 static int net_slirp_init(VLANState *vlan, const char *model, const char *name)
 483 {
 484     if (!slirp_inited) {
 485         slirp_inited = 1;
 486         slirp_init();
 487     }
 488     slirp_vc = qemu_new_vlan_client(vlan, model, name,
 489                                     slirp_receive, NULL, NULL);
 490     slirp_vc->info_str[0] = '\0';
 491     return 0;
 492 }
 493
 494 void net_slirp_redir(const char *redir_str)
 495 {
 496     int is_udp;
 497     char buf[256], *r;
 498     const char *p;
 499     struct in_addr guest_addr;
 500     int host_port, guest_port;
 501
 502     if (!slirp_inited) {
 503         slirp_inited = 1;
 504         slirp_init();
 505     }
 506
 507     p = redir_str;
 508     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 509         goto fail;
 510     if (!strcmp(buf, "tcp")) {
 511         is_udp = 0;
 512     } else if (!strcmp(buf, "udp")) {
 513         is_udp = 1;
 514     } else {
 515         goto fail;
 516     }
 517
 518     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 519         goto fail;
 520     host_port = strtol(buf, &r, 0);
 521     if (r == buf)
 522         goto fail;
 523
 524     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 525         goto fail;
 526     if (buf[0] == '\0') {
 527         pstrcpy(buf, sizeof(buf), "10.0.2.15");
 528     }
 529     if (!inet_aton(buf, &guest_addr))
 530         goto fail;
 531
 532     guest_port = strtol(p, &r, 0);
 533     if (r == p)
 534         goto fail;
 535
 536     if (slirp_redir(is_udp, host_port, guest_addr, guest_port) < 0) {
 537         fprintf(stderr, "qemu: could not set up redirection\n");
 538         exit(1);
 539     }
 540     return;
 541  fail:
 542     fprintf(stderr, "qemu: syntax: -redir [tcp|udp]:host-port:[guest-host]:guest-port\n");
 543     exit(1);
 544 }
 545
 546 #ifndef _WIN32
 547
 548 static char smb_dir[1024];
 549
 550 static void erase_dir(char *dir_name)
 551 {
 552     DIR *d;
 553     struct dirent *de;
 554     char filename[1024];
 555
 556     /* erase all the files in the directory */
 557     if ((d = opendir(dir_name)) != 0) {
 558         for(;;) {
 559             de = readdir(d);
 560             if (!de)
 561                 break;
 562             if (strcmp(de->d_name, ".") != 0 &&
 563                 strcmp(de->d_name, "..") != 0) {
 564                 snprintf(filename, sizeof(filename), "%s/%s",
 565                          smb_dir, de->d_name);
 566                 if (unlink(filename) != 0)  /* is it a directory? */
 567                     erase_dir(filename);
 568             }
 569         }
 570         closedir(d);
 571         rmdir(dir_name);
 572     }
 573 }
 574
 575 /* automatic user mode samba server configuration */
 576 static void smb_exit(void)
 577 {
 578     erase_dir(smb_dir);
 579 }
 580
 581 /* automatic user mode samba server configuration */
 582 void net_slirp_smb(const char *exported_dir)
 583 {
 584     char smb_conf[1024];
 585     char smb_cmdline[1024];
 586     FILE *f;
 587
 588     if (!slirp_inited) {
 589         slirp_inited = 1;
 590         slirp_init();
 591     }
 592
 593     /* XXX: better tmp dir construction */
 594     snprintf(smb_dir, sizeof(smb_dir), "/tmp/qemu-smb.%d", getpid());
 595     if (mkdir(smb_dir, 0700) < 0) {
 596         fprintf(stderr, "qemu: could not create samba server dir '%s'\n", smb_dir);
 597         exit(1);
 598     }
 599     snprintf(smb_conf, sizeof(smb_conf), "%s/%s", smb_dir, "smb.conf");
 600
 601     f = fopen(smb_conf, "w");
 602     if (!f) {
 603         fprintf(stderr, "qemu: could not create samba server configuration file '%s'\n", smb_conf);
 604         exit(1);
 605     }
 606     fprintf(f,
 607             "[global]\n"
 608             "private dir=%s\n"
 609             "smb ports=0\n"
 610             "socket address=127.0.0.1\n"
 611             "pid directory=%s\n"
 612             "lock directory=%s\n"
 613             "log file=%s/log.smbd\n"
 614             "smb passwd file=%s/smbpasswd\n"
 615             "security = share\n"
 616             "[qemu]\n"
 617             "path=%s\n"
 618             "read only=no\n"
 619             "guest ok=yes\n",
 620             smb_dir,
 621             smb_dir,
 622             smb_dir,
 623             smb_dir,
 624             smb_dir,
 625             exported_dir
 626             );
 627     fclose(f);
 628     atexit(smb_exit);
 629
 630     snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -s %s",
 631              SMBD_COMMAND, smb_conf);
 632
 633     slirp_add_exec(0, smb_cmdline, 4, 139);
 634 }
 635
 636 #endif /* !defined(_WIN32) */
 637 void do_info_slirp(void)
 638 {
 639     slirp_stats();
 640 }
 641
 642 #endif /* CONFIG_SLIRP */
 643
 644 #if !defined(_WIN32)
 645
 646 typedef struct TAPState {
 647     VLANClientState *vc;
 648     int fd;
 649     char down_script[1024];
 650 } TAPState;
 651
 652 #ifdef HAVE_IOVEC
 653 static ssize_t tap_receive_iov(void *opaque, const struct iovec *iov,
 654                                int iovcnt)
 655 {
 656     TAPState *s = opaque;
 657     ssize_t len;
 658
 659     do {
 660         len = writev(s->fd, iov, iovcnt);
 661     } while (len == -1 && (errno == EINTR || errno == EAGAIN));
 662
 663     return len;
 664 }
 665 #endif
 666
 667 static void tap_receive(void *opaque, const uint8_t *buf, int size)
 668 {
 669     TAPState *s = opaque;
 670     int ret;
 671     for(;;) {
 672         ret = write(s->fd, buf, size);
 673         if (ret < 0 && (errno == EINTR || errno == EAGAIN)) {
 674         } else {
 675             break;
 676         }
 677     }
 678 }
 679
 680 static void tap_send(void *opaque)
 681 {
 682     TAPState *s = opaque;
 683     uint8_t buf[4096];
 684     int size;
 685
 686 #ifdef __sun__
 687     struct strbuf sbuf;
 688     int f = 0;
 689     sbuf.maxlen = sizeof(buf);
 690     sbuf.buf = buf;
 691     size = getmsg(s->fd, NULL, &sbuf, &f) >=0 ? sbuf.len : -1;
 692 #else
 693     size = read(s->fd, buf, sizeof(buf));
 694 #endif
 695     if (size > 0) {
 696         qemu_send_packet(s->vc, buf, size);
 697     }
 698 }
 699
 700 /* fd support */
 701
 702 static TAPState *net_tap_fd_init(VLANState *vlan,
 703                                  const char *model,
 704                                  const char *name,
 705                                  int fd)
 706 {
 707     TAPState *s;
 708
 709     s = qemu_mallocz(sizeof(TAPState));
 710     if (!s)
 711         return NULL;
 712     s->fd = fd;
 713     s->vc = qemu_new_vlan_client(vlan, model, name, tap_receive, NULL, s);
 714 #ifdef HAVE_IOVEC
 715     s->vc->fd_readv = tap_receive_iov;
 716 #endif
 717     qemu_set_fd_handler(s->fd, tap_send, NULL, s);
 718     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "fd=%d", fd);
 719     return s;
 720 }
 721
 722 #if defined (_BSD) || defined (__FreeBSD_kernel__)
 723 static int tap_open(char *ifname, int ifname_size)
 724 {
 725     int fd;
 726     char *dev;
 727     struct stat s;
 728
 729     TFR(fd = open("/dev/tap", O_RDWR));
 730     if (fd < 0) {
 731         fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n");
 732         return -1;
 733     }
 734
 735     fstat(fd, &s);
 736     dev = devname(s.st_rdev, S_IFCHR);
 737     pstrcpy(ifname, ifname_size, dev);
 738
 739     fcntl(fd, F_SETFL, O_NONBLOCK);
 740     return fd;
 741 }
 742 #elif defined(__sun__)
 743 #define TUNNEWPPA       (('T'<<16) | 0x0001)
 744 /*
 745  * Allocate TAP device, returns opened fd.
 746  * Stores dev name in the first arg(must be large enough).
 747  */
 748 int tap_alloc(char *dev, size_t dev_size)
 749 {
 750     int tap_fd, if_fd, ppa = -1;
 751     static int ip_fd = 0;
 752     char *ptr;
 753
 754     static int arp_fd = 0;
 755     int ip_muxid, arp_muxid;
 756     struct strioctl  strioc_if, strioc_ppa;
 757     int link_type = I_PLINK;;
 758     struct lifreq ifr;
 759     char actual_name[32] = "";
 760
 761     memset(&ifr, 0x0, sizeof(ifr));
 762
 763     if( *dev ){
 764        ptr = dev;
 765        while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
 766        ppa = atoi(ptr);
 767     }
 768
 769     /* Check if IP device was opened */
 770     if( ip_fd )
 771        close(ip_fd);
 772
 773     TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
 774     if (ip_fd < 0) {
 775        syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)");
 776        return -1;
 777     }
 778
 779     TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
 780     if (tap_fd < 0) {
 781        syslog(LOG_ERR, "Can't open /dev/tap");
 782        return -1;
 783     }
 784
 785     /* Assign a new PPA and get its unit number. */
 786     strioc_ppa.ic_cmd = TUNNEWPPA;
 787     strioc_ppa.ic_timout = 0;
 788     strioc_ppa.ic_len = sizeof(ppa);
 789     strioc_ppa.ic_dp = (char *)&ppa;
 790     if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
 791        syslog (LOG_ERR, "Can't assign new interface");
 792
 793     TFR(if_fd = open("/dev/tap", O_RDWR, 0));
 794     if (if_fd < 0) {
 795        syslog(LOG_ERR, "Can't open /dev/tap (2)");
 796        return -1;
 797     }
 798     if(ioctl(if_fd, I_PUSH, "ip") < 0){
 799        syslog(LOG_ERR, "Can't push IP module");
 800        return -1;
 801     }
 802
 803     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
 804         syslog(LOG_ERR, "Can't get flags\n");
 805
 806     snprintf (actual_name, 32, "tap%d", ppa);
 807     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
 808
 809     ifr.lifr_ppa = ppa;
 810     /* Assign ppa according to the unit number returned by tun device */
 811
 812     if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
 813         syslog (LOG_ERR, "Can't set PPA %d", ppa);
 814     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
 815         syslog (LOG_ERR, "Can't get flags\n");
 816     /* Push arp module to if_fd */
 817     if (ioctl (if_fd, I_PUSH, "arp") < 0)
 818         syslog (LOG_ERR, "Can't push ARP module (2)");
 819
 820     /* Push arp module to ip_fd */
 821     if (ioctl (ip_fd, I_POP, NULL) < 0)
 822         syslog (LOG_ERR, "I_POP failed\n");
 823     if (ioctl (ip_fd, I_PUSH, "arp") < 0)
 824         syslog (LOG_ERR, "Can't push ARP module (3)\n");
 825     /* Open arp_fd */
 826     TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
 827     if (arp_fd < 0)
 828        syslog (LOG_ERR, "Can't open %s\n", "/dev/tap");
 829
 830     /* Set ifname to arp */
 831     strioc_if.ic_cmd = SIOCSLIFNAME;
 832     strioc_if.ic_timout = 0;
 833     strioc_if.ic_len = sizeof(ifr);
 834     strioc_if.ic_dp = (char *)&ifr;
 835     if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
 836         syslog (LOG_ERR, "Can't set ifname to arp\n");
 837     }
 838
 839     if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
 840        syslog(LOG_ERR, "Can't link TAP device to IP");
 841        return -1;
 842     }
 843
 844     if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
 845         syslog (LOG_ERR, "Can't link TAP device to ARP");
 846
 847     close (if_fd);
 848
 849     memset(&ifr, 0x0, sizeof(ifr));
 850     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
 851     ifr.lifr_ip_muxid  = ip_muxid;
 852     ifr.lifr_arp_muxid = arp_muxid;
 853
 854     if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
 855     {
 856       ioctl (ip_fd, I_PUNLINK , arp_muxid);
 857       ioctl (ip_fd, I_PUNLINK, ip_muxid);
 858       syslog (LOG_ERR, "Can't set multiplexor id");
 859     }
 860
 861     snprintf(dev, dev_size, "tap%d", ppa);
 862     return tap_fd;
 863 }
 864
 865 static int tap_open(char *ifname, int ifname_size)
 866 {
 867     char  dev[10]="";
 868     int fd;
 869     if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){
 870        fprintf(stderr, "Cannot allocate TAP device\n");
 871        return -1;
 872     }
 873     pstrcpy(ifname, ifname_size, dev);
 874     fcntl(fd, F_SETFL, O_NONBLOCK);
 875     return fd;
 876 }
 877 #elif defined (_AIX)
 878 static int tap_open(char *ifname, int ifname_size)
 879 {
 880     fprintf (stderr, "no tap on AIX\n");
 881     return -1;
 882 }
 883 #else
 884 static int tap_open(char *ifname, int ifname_size)
 885 {
 886     struct ifreq ifr;
 887     int fd, ret;
 888
 889     TFR(fd = open("/dev/net/tun", O_RDWR));
 890     if (fd < 0) {
 891         fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n");
 892         return -1;
 893     }
 894     memset(&ifr, 0, sizeof(ifr));
 895     ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
 896     if (ifname[0] != '\0')
 897         pstrcpy(ifr.ifr_name, IFNAMSIZ, ifname);
 898     else
 899         pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d");
 900     ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
 901     if (ret != 0) {
 902         fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n");
 903         close(fd);
 904         return -1;
 905     }
 906     pstrcpy(ifname, ifname_size, ifr.ifr_name);
 907     fcntl(fd, F_SETFL, O_NONBLOCK);
 908     return fd;
 909 }
 910 #endif
 911
 912 static int launch_script(const char *setup_script, const char *ifname, int fd)
 913 {
 914     int pid, status;
 915     char *args[3];
 916     char **parg;
 917
 918         /* try to launch network script */
 919         pid = fork();
 920         if (pid >= 0) {
 921             if (pid == 0) {
 922                 int open_max = sysconf (_SC_OPEN_MAX), i;
 923                 for (i = 0; i < open_max; i++)
 924                     if (i != STDIN_FILENO &&
 925                         i != STDOUT_FILENO &&
 926                         i != STDERR_FILENO &&
 927                         i != fd)
 928                         close(i);
 929
 930                 parg = args;
 931                 *parg++ = (char *)setup_script;
 932                 *parg++ = (char *)ifname;
 933                 *parg++ = NULL;
 934                 execv(setup_script, args);
 935                 _exit(1);
 936             }
 937             while (waitpid(pid, &status, 0) != pid);
 938             if (!WIFEXITED(status) ||
 939                 WEXITSTATUS(status) != 0) {
 940                 fprintf(stderr, "%s: could not launch network script\n",
 941                         setup_script);
 942                 return -1;
 943             }
 944         }
 945     return 0;
 946 }
 947
 948 static int net_tap_init(VLANState *vlan, const char *model,
 949                         const char *name, const char *ifname1,
 950                         const char *setup_script, const char *down_script)
 951 {
 952     TAPState *s;
 953     int fd;
 954     char ifname[128];
 955
 956     if (ifname1 != NULL)
 957         pstrcpy(ifname, sizeof(ifname), ifname1);
 958     else
 959         ifname[0] = '\0';
 960     TFR(fd = tap_open(ifname, sizeof(ifname)));
 961     if (fd < 0)
 962         return -1;
 963
 964     if (!setup_script || !strcmp(setup_script, "no"))
 965         setup_script = "";
 966     if (setup_script[0] != '\0') {
 967         if (launch_script(setup_script, ifname, fd))
 968             return -1;
 969     }
 970     s = net_tap_fd_init(vlan, model, name, fd);
 971     if (!s)
 972         return -1;
 973     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
 974              "ifname=%s,script=%s,downscript=%s",
 975              ifname, setup_script, down_script);
 976     if (down_script && strcmp(down_script, "no"))
 977         snprintf(s->down_script, sizeof(s->down_script), "%s", down_script);
 978     return 0;
 979 }
 980
 981 #endif /* !_WIN32 */
 982
 983 #if defined(CONFIG_VDE)
 984 typedef struct VDEState {
 985     VLANClientState *vc;
 986     VDECONN *vde;
 987 } VDEState;
 988
 989 static void vde_to_qemu(void *opaque)
 990 {
 991     VDEState *s = opaque;
 992     uint8_t buf[4096];
 993     int size;
 994
 995     size = vde_recv(s->vde, buf, sizeof(buf), 0);
 996     if (size > 0) {
 997         qemu_send_packet(s->vc, buf, size);
 998     }
 999 }
1000
1001 static void vde_from_qemu(void *opaque, const uint8_t *buf, int size)
1002 {
1003     VDEState *s = opaque;
1004     int ret;
1005     for(;;) {
1006         ret = vde_send(s->vde, buf, size, 0);
1007         if (ret < 0 && errno == EINTR) {
1008         } else {
1009             break;
1010         }
1011     }
1012 }
1013
1014 static int net_vde_init(VLANState *vlan, const char *model,
1015                         const char *name, const char *sock,
1016                         int port, const char *group, int mode)
1017 {
1018     VDEState *s;
1019     char *init_group = strlen(group) ? (char *)group : NULL;
1020     char *init_sock = strlen(sock) ? (char *)sock : NULL;
1021
1022     struct vde_open_args args = {
1023         .port = port,
1024         .group = init_group,
1025         .mode = mode,
1026     };
1027
1028     s = qemu_mallocz(sizeof(VDEState));
1029     if (!s)
1030         return -1;
1031     s->vde = vde_open(init_sock, "QEMU", &args);
1032     if (!s->vde){
1033         free(s);
1034         return -1;
1035     }
1036     s->vc = qemu_new_vlan_client(vlan, model, name, vde_from_qemu, NULL, s);
1037     qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
1038     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "sock=%s,fd=%d",
1039              sock, vde_datafd(s->vde));
1040     return 0;
1041 }
1042 #endif
1043
1044 /* network connection */
1045 typedef struct NetSocketState {
1046     VLANClientState *vc;
1047     int fd;
1048     int state; /* 0 = getting length, 1 = getting data */
1049     int index;
1050     int packet_len;
1051     uint8_t buf[4096];
1052     struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
1053 } NetSocketState;
1054
1055 typedef struct NetSocketListenState {
1056     VLANState *vlan;
1057     char *model;
1058     char *name;
1059     int fd;
1060 } NetSocketListenState;
1061
1062 /* XXX: we consider we can send the whole packet without blocking */
1063 static void net_socket_receive(void *opaque, const uint8_t *buf, int size)
1064 {
1065     NetSocketState *s = opaque;
1066     uint32_t len;
1067     len = htonl(size);
1068
1069     send_all(s->fd, (const uint8_t *)&len, sizeof(len));
1070     send_all(s->fd, buf, size);
1071 }
1072
1073 static void net_socket_receive_dgram(void *opaque, const uint8_t *buf, int size)
1074 {
1075     NetSocketState *s = opaque;
1076     sendto(s->fd, buf, size, 0,
1077            (struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst));
1078 }
1079
1080 static void net_socket_send(void *opaque)
1081 {
1082     NetSocketState *s = opaque;
1083     int l, size, err;
1084     uint8_t buf1[4096];
1085     const uint8_t *buf;
1086
1087     size = recv(s->fd, buf1, sizeof(buf1), 0);
1088     if (size < 0) {
1089         err = socket_error();
1090         if (err != EWOULDBLOCK)
1091             goto eoc;
1092     } else if (size == 0) {
1093         /* end of connection */
1094     eoc:
1095         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1096         closesocket(s->fd);
1097         return;
1098     }
1099     buf = buf1;
1100     while (size > 0) {
1101         /* reassemble a packet from the network */
1102         switch(s->state) {
1103         case 0:
1104             l = 4 - s->index;
1105             if (l > size)
1106                 l = size;
1107             memcpy(s->buf + s->index, buf, l);
1108             buf += l;
1109             size -= l;
1110             s->index += l;
1111             if (s->index == 4) {
1112                 /* got length */
1113                 s->packet_len = ntohl(*(uint32_t *)s->buf);
1114                 s->index = 0;
1115                 s->state = 1;
1116             }
1117             break;
1118         case 1:
1119             l = s->packet_len - s->index;
1120             if (l > size)
1121                 l = size;
1122             memcpy(s->buf + s->index, buf, l);
1123             s->index += l;
1124             buf += l;
1125             size -= l;
1126             if (s->index >= s->packet_len) {
1127                 qemu_send_packet(s->vc, s->buf, s->packet_len);
1128                 s->index = 0;
1129                 s->state = 0;
1130             }
1131             break;
1132         }
1133     }
1134 }
1135
1136 static void net_socket_send_dgram(void *opaque)
1137 {
1138     NetSocketState *s = opaque;
1139     int size;
1140
1141     size = recv(s->fd, s->buf, sizeof(s->buf), 0);
1142     if (size < 0)
1143         return;
1144     if (size == 0) {
1145         /* end of connection */
1146         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1147         return;
1148     }
1149     qemu_send_packet(s->vc, s->buf, size);
1150 }
1151
1152 static int net_socket_mcast_create(struct sockaddr_in *mcastaddr)
1153 {
1154     struct ip_mreq imr;
1155     int fd;
1156     int val, ret;
1157     if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
1158         fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n",
1159                 inet_ntoa(mcastaddr->sin_addr),
1160                 (int)ntohl(mcastaddr->sin_addr.s_addr));
1161         return -1;
1162
1163     }
1164     fd = socket(PF_INET, SOCK_DGRAM, 0);
1165     if (fd < 0) {
1166         perror("socket(PF_INET, SOCK_DGRAM)");
1167         return -1;
1168     }
1169
1170     val = 1;
1171     ret=setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
1172                    (const char *)&val, sizeof(val));
1173     if (ret < 0) {
1174         perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
1175         goto fail;
1176     }
1177
1178     ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
1179     if (ret < 0) {
1180         perror("bind");
1181         goto fail;
1182     }
1183
1184     /* Add host to multicast group */
1185     imr.imr_multiaddr = mcastaddr->sin_addr;
1186     imr.imr_interface.s_addr = htonl(INADDR_ANY);
1187
1188     ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1189                      (const char *)&imr, sizeof(struct ip_mreq));
1190     if (ret < 0) {
1191         perror("setsockopt(IP_ADD_MEMBERSHIP)");
1192         goto fail;
1193     }
1194
1195     /* Force mcast msgs to loopback (eg. several QEMUs in same host */
1196     val = 1;
1197     ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1198                    (const char *)&val, sizeof(val));
1199     if (ret < 0) {
1200         perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
1201         goto fail;
1202     }
1203
1204     socket_set_nonblock(fd);
1205     return fd;
1206 fail:
1207     if (fd >= 0)
1208         closesocket(fd);
1209     return -1;
1210 }
1211
1212 static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
1213                                                 const char *model,
1214                                                 const char *name,
1215                                                 int fd, int is_connected)
1216 {
1217     struct sockaddr_in saddr;
1218     int newfd;
1219     socklen_t saddr_len;
1220     NetSocketState *s;
1221
1222     /* fd passed: multicast: "learn" dgram_dst address from bound address and save it
1223      * Because this may be "shared" socket from a "master" process, datagrams would be recv()
1224      * by ONLY ONE process: we must "clone" this dgram socket --jjo
1225      */
1226
1227     if (is_connected) {
1228         if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
1229             /* must be bound */
1230             if (saddr.sin_addr.s_addr==0) {
1231                 fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, cannot setup multicast dst addr\n",
1232                         fd);
1233                 return NULL;
1234             }
1235             /* clone dgram socket */
1236             newfd = net_socket_mcast_create(&saddr);
1237             if (newfd < 0) {
1238                 /* error already reported by net_socket_mcast_create() */
1239                 close(fd);
1240                 return NULL;
1241             }
1242             /* clone newfd to fd, close newfd */
1243             dup2(newfd, fd);
1244             close(newfd);
1245
1246         } else {
1247             fprintf(stderr, "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
1248                     fd, strerror(errno));
1249             return NULL;
1250         }
1251     }
1252
1253     s = qemu_mallocz(sizeof(NetSocketState));
1254     if (!s)
1255         return NULL;
1256     s->fd = fd;
1257
1258     s->vc = qemu_new_vlan_client(vlan, model, name, net_socket_receive_dgram, NULL, s);
1259     qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s);
1260
1261     /* mcast: save bound address as dst */
1262     if (is_connected) s->dgram_dst=saddr;
1263
1264     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1265             "socket: fd=%d (%s mcast=%s:%d)",
1266             fd, is_connected? "cloned" : "",
1267             inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1268     return s;
1269 }
1270
1271 static void net_socket_connect(void *opaque)
1272 {
1273     NetSocketState *s = opaque;
1274     qemu_set_fd_handler(s->fd, net_socket_send, NULL, s);
1275 }
1276
1277 static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
1278                                                  const char *model,
1279                                                  const char *name,
1280                                                  int fd, int is_connected)
1281 {
1282     NetSocketState *s;
1283     s = qemu_mallocz(sizeof(NetSocketState));
1284     if (!s)
1285         return NULL;
1286     s->fd = fd;
1287     s->vc = qemu_new_vlan_client(vlan, model, name,
1288                                  net_socket_receive, NULL, s);
1289     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1290              "socket: fd=%d", fd);
1291     if (is_connected) {
1292         net_socket_connect(s);
1293     } else {
1294         qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
1295     }
1296     return s;
1297 }
1298
1299 static NetSocketState *net_socket_fd_init(VLANState *vlan,
1300                                           const char *model, const char *name,
1301                                           int fd, int is_connected)
1302 {
1303     int so_type=-1, optlen=sizeof(so_type);
1304
1305     if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type,
1306         (socklen_t *)&optlen)< 0) {
1307         fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n", fd);
1308         return NULL;
1309     }
1310     switch(so_type) {
1311     case SOCK_DGRAM:
1312         return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected);
1313     case SOCK_STREAM:
1314         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1315     default:
1316         /* who knows ... this could be a eg. a pty, do warn and continue as stream */
1317         fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
1318         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1319     }
1320     return NULL;
1321 }
1322
1323 static void net_socket_accept(void *opaque)
1324 {
1325     NetSocketListenState *s = opaque;
1326     NetSocketState *s1;
1327     struct sockaddr_in saddr;
1328     socklen_t len;
1329     int fd;
1330
1331     for(;;) {
1332         len = sizeof(saddr);
1333         fd = accept(s->fd, (struct sockaddr *)&saddr, &len);
1334         if (fd < 0 && errno != EINTR) {
1335             return;
1336         } else if (fd >= 0) {
1337             break;
1338         }
1339     }
1340     s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1);
1341     if (!s1) {
1342         closesocket(fd);
1343     } else {
1344         snprintf(s1->vc->info_str, sizeof(s1->vc->info_str),
1345                  "socket: connection from %s:%d",
1346                  inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1347     }
1348 }
1349
1350 static int net_socket_listen_init(VLANState *vlan,
1351                                   const char *model,
1352                                   const char *name,
1353                                   const char *host_str)
1354 {
1355     NetSocketListenState *s;
1356     int fd, val, ret;
1357     struct sockaddr_in saddr;
1358
1359     if (parse_host_port(&saddr, host_str) < 0)
1360         return -1;
1361
1362     s = qemu_mallocz(sizeof(NetSocketListenState));
1363     if (!s)
1364         return -1;
1365
1366     fd = socket(PF_INET, SOCK_STREAM, 0);
1367     if (fd < 0) {
1368         perror("socket");
1369         return -1;
1370     }
1371     socket_set_nonblock(fd);
1372
1373     /* allow fast reuse */
1374     val = 1;
1375     setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));
1376
1377     ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
1378     if (ret < 0) {
1379         perror("bind");
1380         return -1;
1381     }
1382     ret = listen(fd, 0);
1383     if (ret < 0) {
1384         perror("listen");
1385         return -1;
1386     }
1387     s->vlan = vlan;
1388     s->model = strdup(model);
1389     s->name = strdup(name);
1390     s->fd = fd;
1391     qemu_set_fd_handler(fd, net_socket_accept, NULL, s);
1392     return 0;
1393 }
1394
1395 static int net_socket_connect_init(VLANState *vlan,
1396                                    const char *model,
1397                                    const char *name,
1398                                    const char *host_str)
1399 {
1400     NetSocketState *s;
1401     int fd, connected, ret, err;
1402     struct sockaddr_in saddr;
1403
1404     if (parse_host_port(&saddr, host_str) < 0)
1405         return -1;
1406
1407     fd = socket(PF_INET, SOCK_STREAM, 0);
1408     if (fd < 0) {
1409         perror("socket");
1410         return -1;
1411     }
1412     socket_set_nonblock(fd);
1413
1414     connected = 0;
1415     for(;;) {
1416         ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
1417         if (ret < 0) {
1418             err = socket_error();
1419             if (err == EINTR || err == EWOULDBLOCK) {
1420             } else if (err == EINPROGRESS) {
1421                 break;
1422 #ifdef _WIN32
1423             } else if (err == WSAEALREADY) {
1424                 break;
1425 #endif
1426             } else {
1427                 perror("connect");
1428                 closesocket(fd);
1429                 return -1;
1430             }
1431         } else {
1432             connected = 1;
1433             break;
1434         }
1435     }
1436     s = net_socket_fd_init(vlan, model, name, fd, connected);
1437     if (!s)
1438         return -1;
1439     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1440              "socket: connect to %s:%d",
1441              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1442     return 0;
1443 }
1444
1445 static int net_socket_mcast_init(VLANState *vlan,
1446                                  const char *model,
1447                                  const char *name,
1448                                  const char *host_str)
1449 {
1450     NetSocketState *s;
1451     int fd;
1452     struct sockaddr_in saddr;
1453
1454     if (parse_host_port(&saddr, host_str) < 0)
1455         return -1;
1456
1457
1458     fd = net_socket_mcast_create(&saddr);
1459     if (fd < 0)
1460         return -1;
1461
1462     s = net_socket_fd_init(vlan, model, name, fd, 0);
1463     if (!s)
1464         return -1;
1465
1466     s->dgram_dst = saddr;
1467
1468     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1469              "socket: mcast=%s:%d",
1470              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1471     return 0;
1472
1473 }
1474
1475 /* find or alloc a new VLAN */
1476 VLANState *qemu_find_vlan(int id)
1477 {
1478     VLANState **pvlan, *vlan;
1479     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1480         if (vlan->id == id)
1481             return vlan;
1482     }
1483     vlan = qemu_mallocz(sizeof(VLANState));
1484     if (!vlan)
1485         return NULL;
1486     vlan->id = id;
1487     vlan->next = NULL;
1488     pvlan = &first_vlan;
1489     while (*pvlan != NULL)
1490         pvlan = &(*pvlan)->next;
1491     *pvlan = vlan;
1492     return vlan;
1493 }
1494
1495 int net_client_init(const char *device, const char *p)
1496 {
1497     char buf[1024];
1498     int vlan_id, ret;
1499     VLANState *vlan;
1500     char *name = NULL;
1501
1502     vlan_id = 0;
1503     if (get_param_value(buf, sizeof(buf), "vlan", p)) {
1504         vlan_id = strtol(buf, NULL, 0);
1505     }
1506     vlan = qemu_find_vlan(vlan_id);
1507     if (!vlan) {
1508         fprintf(stderr, "Could not create vlan %d\n", vlan_id);
1509         return -1;
1510     }
1511     if (get_param_value(buf, sizeof(buf), "name", p)) {
1512         name = strdup(buf);
1513     }
1514     if (!strcmp(device, "nic")) {
1515         NICInfo *nd;
1516         uint8_t *macaddr;
1517
1518         if (nb_nics >= MAX_NICS) {
1519             fprintf(stderr, "Too Many NICs\n");
1520             return -1;
1521         }
1522         nd = &nd_table[nb_nics];
1523         macaddr = nd->macaddr;
1524         macaddr[0] = 0x52;
1525         macaddr[1] = 0x54;
1526         macaddr[2] = 0x00;
1527         macaddr[3] = 0x12;
1528         macaddr[4] = 0x34;
1529         macaddr[5] = 0x56 + nb_nics;
1530
1531         if (get_param_value(buf, sizeof(buf), "macaddr", p)) {
1532             if (parse_macaddr(macaddr, buf) < 0) {
1533                 fprintf(stderr, "invalid syntax for ethernet address\n");
1534                 return -1;
1535             }
1536         }
1537         if (get_param_value(buf, sizeof(buf), "model", p)) {
1538             nd->model = strdup(buf);
1539         }
1540         nd->vlan = vlan;
1541         nd->name = name;
1542         name = NULL;
1543         nb_nics++;
1544         vlan->nb_guest_devs++;
1545         ret = 0;
1546     } else
1547     if (!strcmp(device, "none")) {
1548         /* does nothing. It is needed to signal that no network cards
1549            are wanted */
1550         ret = 0;
1551     } else
1552 #ifdef CONFIG_SLIRP
1553     if (!strcmp(device, "user")) {
1554         if (get_param_value(buf, sizeof(buf), "hostname", p)) {
1555             pstrcpy(slirp_hostname, sizeof(slirp_hostname), buf);
1556         }
1557         vlan->nb_host_devs++;
1558         ret = net_slirp_init(vlan, device, name);
1559     } else
1560 #endif
1561 #ifdef _WIN32
1562     if (!strcmp(device, "tap")) {
1563         char ifname[64];
1564         if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
1565             fprintf(stderr, "tap: no interface name\n");
1566             return -1;
1567         }
1568         vlan->nb_host_devs++;
1569         ret = tap_win32_init(vlan, device, name, ifname);
1570     } else
1571 #elif defined (_AIX)
1572 #else
1573     if (!strcmp(device, "tap")) {
1574         char ifname[64];
1575         char setup_script[1024], down_script[1024];
1576         int fd;
1577         vlan->nb_host_devs++;
1578         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
1579             fd = strtol(buf, NULL, 0);
1580             fcntl(fd, F_SETFL, O_NONBLOCK);
1581             ret = -1;
1582             if (net_tap_fd_init(vlan, device, name, fd))
1583                 ret = 0;
1584         } else {
1585             if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
1586                 ifname[0] = '\0';
1587             }
1588             if (get_param_value(setup_script, sizeof(setup_script), "script", p) == 0) {
1589                 pstrcpy(setup_script, sizeof(setup_script), DEFAULT_NETWORK_SCRIPT);
1590             }
1591             if (get_param_value(down_script, sizeof(down_script), "downscript", p) == 0) {
1592                 pstrcpy(down_script, sizeof(down_script), DEFAULT_NETWORK_DOWN_SCRIPT);
1593             }
1594             ret = net_tap_init(vlan, device, name, ifname, setup_script, down_script);
1595         }
1596     } else
1597 #endif
1598     if (!strcmp(device, "socket")) {
1599         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
1600             int fd;
1601             fd = strtol(buf, NULL, 0);
1602             ret = -1;
1603             if (net_socket_fd_init(vlan, device, name, fd, 1))
1604                 ret = 0;
1605         } else if (get_param_value(buf, sizeof(buf), "listen", p) > 0) {
1606             ret = net_socket_listen_init(vlan, device, name, buf);
1607         } else if (get_param_value(buf, sizeof(buf), "connect", p) > 0) {
1608             ret = net_socket_connect_init(vlan, device, name, buf);
1609         } else if (get_param_value(buf, sizeof(buf), "mcast", p) > 0) {
1610             ret = net_socket_mcast_init(vlan, device, name, buf);
1611         } else {
1612             fprintf(stderr, "Unknown socket options: %s\n", p);
1613             return -1;
1614         }
1615         vlan->nb_host_devs++;
1616     } else
1617 #ifdef CONFIG_VDE
1618     if (!strcmp(device, "vde")) {
1619         char vde_sock[1024], vde_group[512];
1620         int vde_port, vde_mode;
1621         vlan->nb_host_devs++;
1622         if (get_param_value(vde_sock, sizeof(vde_sock), "sock", p) <= 0) {
1623             vde_sock[0] = '\0';
1624         }
1625         if (get_param_value(buf, sizeof(buf), "port", p) > 0) {
1626             vde_port = strtol(buf, NULL, 10);
1627         } else {
1628             vde_port = 0;
1629         }
1630         if (get_param_value(vde_group, sizeof(vde_group), "group", p) <= 0) {
1631             vde_group[0] = '\0';
1632         }
1633         if (get_param_value(buf, sizeof(buf), "mode", p) > 0) {
1634             vde_mode = strtol(buf, NULL, 8);
1635         } else {
1636             vde_mode = 0700;
1637         }
1638         ret = net_vde_init(vlan, device, name, vde_sock, vde_port, vde_group, vde_mode);
1639     } else
1640 #endif
1641     {
1642         fprintf(stderr, "Unknown network device: %s\n", device);
1643         if (name)
1644             free(name);
1645         return -1;
1646     }
1647     if (ret < 0) {
1648         fprintf(stderr, "Could not initialize device '%s'\n", device);
1649     }
1650     if (name)
1651         free(name);
1652     return ret;
1653 }
1654
1655 int net_client_parse(const char *str)
1656 {
1657     const char *p;
1658     char *q;
1659     char device[64];
1660
1661     p = str;
1662     q = device;
1663     while (*p != '\0' && *p != ',') {
1664         if ((q - device) < sizeof(device) - 1)
1665             *q++ = *p;
1666         p++;
1667     }
1668     *q = '\0';
1669     if (*p == ',')
1670         p++;
1671
1672     return net_client_init(device, p);
1673 }
1674
1675 void do_info_network(void)
1676 {
1677     VLANState *vlan;
1678     VLANClientState *vc;
1679
1680     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1681         term_printf("VLAN %d devices:\n", vlan->id);
1682         for(vc = vlan->first_client; vc != NULL; vc = vc->next)
1683             term_printf("  %s: %s\n", vc->name, vc->info_str);
1684     }
1685 }
1686
1687 void net_cleanup(void)
1688 {
1689     VLANState *vlan;
1690
1691 #if !defined(_WIN32)
1692     /* close network clients */
1693     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1694         VLANClientState *vc;
1695
1696         for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
1697             if (vc->fd_read == tap_receive) {
1698                 char ifname[64];
1699                 TAPState *s = vc->opaque;
1700
1701                 if (strcmp(vc->model, "tap") == 0 &&
1702                     sscanf(vc->info_str, "ifname=%63s ", ifname) == 1 &&
1703                     s->down_script[0])
1704                     launch_script(s->down_script, ifname, s->fd);
1705             }
1706 #if defined(CONFIG_VDE)
1707             if (vc->fd_read == vde_from_qemu) {
1708                 VDEState *s = vc->opaque;
1709                 vde_close(s->vde);
1710             }
1711 #endif
1712         }
1713     }
1714 #endif
1715 }
1716
1717 void net_client_check(void)
1718 {
1719     VLANState *vlan;
1720
1721     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1722         if (vlan->nb_guest_devs == 0 && vlan->nb_host_devs == 0)
1723             continue;
1724         if (vlan->nb_guest_devs == 0)
1725             fprintf(stderr, "Warning: vlan %d with no nics\n", vlan->id);
1726         if (vlan->nb_host_devs == 0)
1727             fprintf(stderr,
1728                     "Warning: vlan %d is not connected to host network\n",
1729                     vlan->id);
1730     }
1731 }