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 int slirp_restrict;
 451 static char *slirp_ip;
 452 static VLANClientState *slirp_vc;
 453
 454 int slirp_can_output(void)
 455 {
 456     return !slirp_vc || qemu_can_send_packet(slirp_vc);
 457 }
 458
 459 void slirp_output(const uint8_t *pkt, int pkt_len)
 460 {
 461 #ifdef DEBUG_SLIRP
 462     printf("slirp output:\n");
 463     hex_dump(stdout, pkt, pkt_len);
 464 #endif
 465     if (!slirp_vc)
 466         return;
 467     qemu_send_packet(slirp_vc, pkt, pkt_len);
 468 }
 469
 470 int slirp_is_inited(void)
 471 {
 472     return slirp_inited;
 473 }
 474
 475 static void slirp_receive(void *opaque, const uint8_t *buf, int size)
 476 {
 477 #ifdef DEBUG_SLIRP
 478     printf("slirp input:\n");
 479     hex_dump(stdout, buf, size);
 480 #endif
 481     slirp_input(buf, size);
 482 }
 483
 484 static int net_slirp_init(VLANState *vlan, const char *model, const char *name)
 485 {
 486     if (!slirp_inited) {
 487         slirp_inited = 1;
 488         slirp_init(slirp_restrict, slirp_ip);
 489     }
 490     slirp_vc = qemu_new_vlan_client(vlan, model, name,
 491                                     slirp_receive, NULL, NULL);
 492     slirp_vc->info_str[0] = '\0';
 493     return 0;
 494 }
 495
 496 void net_slirp_redir(const char *redir_str)
 497 {
 498     int is_udp;
 499     char buf[256], *r;
 500     const char *p;
 501     struct in_addr guest_addr;
 502     int host_port, guest_port;
 503
 504     if (!slirp_inited) {
 505         slirp_inited = 1;
 506         slirp_init(slirp_restrict, slirp_ip);
 507     }
 508
 509     p = redir_str;
 510     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 511         goto fail;
 512     if (!strcmp(buf, "tcp")) {
 513         is_udp = 0;
 514     } else if (!strcmp(buf, "udp")) {
 515         is_udp = 1;
 516     } else {
 517         goto fail;
 518     }
 519
 520     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 521         goto fail;
 522     host_port = strtol(buf, &r, 0);
 523     if (r == buf)
 524         goto fail;
 525
 526     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 527         goto fail;
 528     if (buf[0] == '\0') {
 529         pstrcpy(buf, sizeof(buf), "10.0.2.15");
 530     }
 531     if (!inet_aton(buf, &guest_addr))
 532         goto fail;
 533
 534     guest_port = strtol(p, &r, 0);
 535     if (r == p)
 536         goto fail;
 537
 538     if (slirp_redir(is_udp, host_port, guest_addr, guest_port) < 0) {
 539         fprintf(stderr, "qemu: could not set up redirection\n");
 540         exit(1);
 541     }
 542     return;
 543  fail:
 544     fprintf(stderr, "qemu: syntax: -redir [tcp|udp]:host-port:[guest-host]:guest-port\n");
 545     exit(1);
 546 }
 547
 548 #ifndef _WIN32
 549
 550 static char smb_dir[1024];
 551
 552 static void erase_dir(char *dir_name)
 553 {
 554     DIR *d;
 555     struct dirent *de;
 556     char filename[1024];
 557
 558     /* erase all the files in the directory */
 559     if ((d = opendir(dir_name)) != 0) {
 560         for(;;) {
 561             de = readdir(d);
 562             if (!de)
 563                 break;
 564             if (strcmp(de->d_name, ".") != 0 &&
 565                 strcmp(de->d_name, "..") != 0) {
 566                 snprintf(filename, sizeof(filename), "%s/%s",
 567                          smb_dir, de->d_name);
 568                 if (unlink(filename) != 0)  /* is it a directory? */
 569                     erase_dir(filename);
 570             }
 571         }
 572         closedir(d);
 573         rmdir(dir_name);
 574     }
 575 }
 576
 577 /* automatic user mode samba server configuration */
 578 static void smb_exit(void)
 579 {
 580     erase_dir(smb_dir);
 581 }
 582
 583 /* automatic user mode samba server configuration */
 584 void net_slirp_smb(const char *exported_dir)
 585 {
 586     char smb_conf[1024];
 587     char smb_cmdline[1024];
 588     FILE *f;
 589
 590     if (!slirp_inited) {
 591         slirp_inited = 1;
 592         slirp_init(slirp_restrict, slirp_ip);
 593     }
 594
 595     /* XXX: better tmp dir construction */
 596     snprintf(smb_dir, sizeof(smb_dir), "/tmp/qemu-smb.%d", getpid());
 597     if (mkdir(smb_dir, 0700) < 0) {
 598         fprintf(stderr, "qemu: could not create samba server dir '%s'\n", smb_dir);
 599         exit(1);
 600     }
 601     snprintf(smb_conf, sizeof(smb_conf), "%s/%s", smb_dir, "smb.conf");
 602
 603     f = fopen(smb_conf, "w");
 604     if (!f) {
 605         fprintf(stderr, "qemu: could not create samba server configuration file '%s'\n", smb_conf);
 606         exit(1);
 607     }
 608     fprintf(f,
 609             "[global]\n"
 610             "private dir=%s\n"
 611             "smb ports=0\n"
 612             "socket address=127.0.0.1\n"
 613             "pid directory=%s\n"
 614             "lock directory=%s\n"
 615             "log file=%s/log.smbd\n"
 616             "smb passwd file=%s/smbpasswd\n"
 617             "security = share\n"
 618             "[qemu]\n"
 619             "path=%s\n"
 620             "read only=no\n"
 621             "guest ok=yes\n",
 622             smb_dir,
 623             smb_dir,
 624             smb_dir,
 625             smb_dir,
 626             smb_dir,
 627             exported_dir
 628             );
 629     fclose(f);
 630     atexit(smb_exit);
 631
 632     snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -s %s",
 633              SMBD_COMMAND, smb_conf);
 634
 635     slirp_add_exec(0, smb_cmdline, 4, 139);
 636 }
 637
 638 #endif /* !defined(_WIN32) */
 639 void do_info_slirp(void)
 640 {
 641     slirp_stats();
 642 }
 643
 644 #endif /* CONFIG_SLIRP */
 645
 646 #if !defined(_WIN32)
 647
 648 typedef struct TAPState {
 649     VLANClientState *vc;
 650     int fd;
 651     char down_script[1024];
 652 } TAPState;
 653
 654 #ifdef HAVE_IOVEC
 655 static ssize_t tap_receive_iov(void *opaque, const struct iovec *iov,
 656                                int iovcnt)
 657 {
 658     TAPState *s = opaque;
 659     ssize_t len;
 660
 661     do {
 662         len = writev(s->fd, iov, iovcnt);
 663     } while (len == -1 && (errno == EINTR || errno == EAGAIN));
 664
 665     return len;
 666 }
 667 #endif
 668
 669 static void tap_receive(void *opaque, const uint8_t *buf, int size)
 670 {
 671     TAPState *s = opaque;
 672     int ret;
 673     for(;;) {
 674         ret = write(s->fd, buf, size);
 675         if (ret < 0 && (errno == EINTR || errno == EAGAIN)) {
 676         } else {
 677             break;
 678         }
 679     }
 680 }
 681
 682 static void tap_send(void *opaque)
 683 {
 684     TAPState *s = opaque;
 685     uint8_t buf[4096];
 686     int size;
 687
 688 #ifdef __sun__
 689     struct strbuf sbuf;
 690     int f = 0;
 691     sbuf.maxlen = sizeof(buf);
 692     sbuf.buf = buf;
 693     size = getmsg(s->fd, NULL, &sbuf, &f) >=0 ? sbuf.len : -1;
 694 #else
 695     size = read(s->fd, buf, sizeof(buf));
 696 #endif
 697     if (size > 0) {
 698         qemu_send_packet(s->vc, buf, size);
 699     }
 700 }
 701
 702 /* fd support */
 703
 704 static TAPState *net_tap_fd_init(VLANState *vlan,
 705                                  const char *model,
 706                                  const char *name,
 707                                  int fd)
 708 {
 709     TAPState *s;
 710
 711     s = qemu_mallocz(sizeof(TAPState));
 712     if (!s)
 713         return NULL;
 714     s->fd = fd;
 715     s->vc = qemu_new_vlan_client(vlan, model, name, tap_receive, NULL, s);
 716 #ifdef HAVE_IOVEC
 717     s->vc->fd_readv = tap_receive_iov;
 718 #endif
 719     qemu_set_fd_handler(s->fd, tap_send, NULL, s);
 720     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "fd=%d", fd);
 721     return s;
 722 }
 723
 724 #if defined (_BSD) || defined (__FreeBSD_kernel__)
 725 static int tap_open(char *ifname, int ifname_size)
 726 {
 727     int fd;
 728     char *dev;
 729     struct stat s;
 730
 731     TFR(fd = open("/dev/tap", O_RDWR));
 732     if (fd < 0) {
 733         fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n");
 734         return -1;
 735     }
 736
 737     fstat(fd, &s);
 738     dev = devname(s.st_rdev, S_IFCHR);
 739     pstrcpy(ifname, ifname_size, dev);
 740
 741     fcntl(fd, F_SETFL, O_NONBLOCK);
 742     return fd;
 743 }
 744 #elif defined(__sun__)
 745 #define TUNNEWPPA       (('T'<<16) | 0x0001)
 746 /*
 747  * Allocate TAP device, returns opened fd.
 748  * Stores dev name in the first arg(must be large enough).
 749  */
 750 int tap_alloc(char *dev, size_t dev_size)
 751 {
 752     int tap_fd, if_fd, ppa = -1;
 753     static int ip_fd = 0;
 754     char *ptr;
 755
 756     static int arp_fd = 0;
 757     int ip_muxid, arp_muxid;
 758     struct strioctl  strioc_if, strioc_ppa;
 759     int link_type = I_PLINK;;
 760     struct lifreq ifr;
 761     char actual_name[32] = "";
 762
 763     memset(&ifr, 0x0, sizeof(ifr));
 764
 765     if( *dev ){
 766        ptr = dev;
 767        while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
 768        ppa = atoi(ptr);
 769     }
 770
 771     /* Check if IP device was opened */
 772     if( ip_fd )
 773        close(ip_fd);
 774
 775     TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
 776     if (ip_fd < 0) {
 777        syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)");
 778        return -1;
 779     }
 780
 781     TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
 782     if (tap_fd < 0) {
 783        syslog(LOG_ERR, "Can't open /dev/tap");
 784        return -1;
 785     }
 786
 787     /* Assign a new PPA and get its unit number. */
 788     strioc_ppa.ic_cmd = TUNNEWPPA;
 789     strioc_ppa.ic_timout = 0;
 790     strioc_ppa.ic_len = sizeof(ppa);
 791     strioc_ppa.ic_dp = (char *)&ppa;
 792     if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
 793        syslog (LOG_ERR, "Can't assign new interface");
 794
 795     TFR(if_fd = open("/dev/tap", O_RDWR, 0));
 796     if (if_fd < 0) {
 797        syslog(LOG_ERR, "Can't open /dev/tap (2)");
 798        return -1;
 799     }
 800     if(ioctl(if_fd, I_PUSH, "ip") < 0){
 801        syslog(LOG_ERR, "Can't push IP module");
 802        return -1;
 803     }
 804
 805     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
 806         syslog(LOG_ERR, "Can't get flags\n");
 807
 808     snprintf (actual_name, 32, "tap%d", ppa);
 809     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
 810
 811     ifr.lifr_ppa = ppa;
 812     /* Assign ppa according to the unit number returned by tun device */
 813
 814     if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
 815         syslog (LOG_ERR, "Can't set PPA %d", ppa);
 816     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
 817         syslog (LOG_ERR, "Can't get flags\n");
 818     /* Push arp module to if_fd */
 819     if (ioctl (if_fd, I_PUSH, "arp") < 0)
 820         syslog (LOG_ERR, "Can't push ARP module (2)");
 821
 822     /* Push arp module to ip_fd */
 823     if (ioctl (ip_fd, I_POP, NULL) < 0)
 824         syslog (LOG_ERR, "I_POP failed\n");
 825     if (ioctl (ip_fd, I_PUSH, "arp") < 0)
 826         syslog (LOG_ERR, "Can't push ARP module (3)\n");
 827     /* Open arp_fd */
 828     TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
 829     if (arp_fd < 0)
 830        syslog (LOG_ERR, "Can't open %s\n", "/dev/tap");
 831
 832     /* Set ifname to arp */
 833     strioc_if.ic_cmd = SIOCSLIFNAME;
 834     strioc_if.ic_timout = 0;
 835     strioc_if.ic_len = sizeof(ifr);
 836     strioc_if.ic_dp = (char *)&ifr;
 837     if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
 838         syslog (LOG_ERR, "Can't set ifname to arp\n");
 839     }
 840
 841     if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
 842        syslog(LOG_ERR, "Can't link TAP device to IP");
 843        return -1;
 844     }
 845
 846     if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
 847         syslog (LOG_ERR, "Can't link TAP device to ARP");
 848
 849     close (if_fd);
 850
 851     memset(&ifr, 0x0, sizeof(ifr));
 852     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
 853     ifr.lifr_ip_muxid  = ip_muxid;
 854     ifr.lifr_arp_muxid = arp_muxid;
 855
 856     if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
 857     {
 858       ioctl (ip_fd, I_PUNLINK , arp_muxid);
 859       ioctl (ip_fd, I_PUNLINK, ip_muxid);
 860       syslog (LOG_ERR, "Can't set multiplexor id");
 861     }
 862
 863     snprintf(dev, dev_size, "tap%d", ppa);
 864     return tap_fd;
 865 }
 866
 867 static int tap_open(char *ifname, int ifname_size)
 868 {
 869     char  dev[10]="";
 870     int fd;
 871     if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){
 872        fprintf(stderr, "Cannot allocate TAP device\n");
 873        return -1;
 874     }
 875     pstrcpy(ifname, ifname_size, dev);
 876     fcntl(fd, F_SETFL, O_NONBLOCK);
 877     return fd;
 878 }
 879 #elif defined (_AIX)
 880 static int tap_open(char *ifname, int ifname_size)
 881 {
 882     fprintf (stderr, "no tap on AIX\n");
 883     return -1;
 884 }
 885 #else
 886 static int tap_open(char *ifname, int ifname_size)
 887 {
 888     struct ifreq ifr;
 889     int fd, ret;
 890
 891     TFR(fd = open("/dev/net/tun", O_RDWR));
 892     if (fd < 0) {
 893         fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n");
 894         return -1;
 895     }
 896     memset(&ifr, 0, sizeof(ifr));
 897     ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
 898     if (ifname[0] != '\0')
 899         pstrcpy(ifr.ifr_name, IFNAMSIZ, ifname);
 900     else
 901         pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d");
 902     ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
 903     if (ret != 0) {
 904         fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n");
 905         close(fd);
 906         return -1;
 907     }
 908     pstrcpy(ifname, ifname_size, ifr.ifr_name);
 909     fcntl(fd, F_SETFL, O_NONBLOCK);
 910     return fd;
 911 }
 912 #endif
 913
 914 static int launch_script(const char *setup_script, const char *ifname, int fd)
 915 {
 916     int pid, status;
 917     char *args[3];
 918     char **parg;
 919
 920         /* try to launch network script */
 921         pid = fork();
 922         if (pid >= 0) {
 923             if (pid == 0) {
 924                 int open_max = sysconf (_SC_OPEN_MAX), i;
 925                 for (i = 0; i < open_max; i++)
 926                     if (i != STDIN_FILENO &&
 927                         i != STDOUT_FILENO &&
 928                         i != STDERR_FILENO &&
 929                         i != fd)
 930                         close(i);
 931
 932                 parg = args;
 933                 *parg++ = (char *)setup_script;
 934                 *parg++ = (char *)ifname;
 935                 *parg++ = NULL;
 936                 execv(setup_script, args);
 937                 _exit(1);
 938             }
 939             while (waitpid(pid, &status, 0) != pid);
 940             if (!WIFEXITED(status) ||
 941                 WEXITSTATUS(status) != 0) {
 942                 fprintf(stderr, "%s: could not launch network script\n",
 943                         setup_script);
 944                 return -1;
 945             }
 946         }
 947     return 0;
 948 }
 949
 950 static int net_tap_init(VLANState *vlan, const char *model,
 951                         const char *name, const char *ifname1,
 952                         const char *setup_script, const char *down_script)
 953 {
 954     TAPState *s;
 955     int fd;
 956     char ifname[128];
 957
 958     if (ifname1 != NULL)
 959         pstrcpy(ifname, sizeof(ifname), ifname1);
 960     else
 961         ifname[0] = '\0';
 962     TFR(fd = tap_open(ifname, sizeof(ifname)));
 963     if (fd < 0)
 964         return -1;
 965
 966     if (!setup_script || !strcmp(setup_script, "no"))
 967         setup_script = "";
 968     if (setup_script[0] != '\0') {
 969         if (launch_script(setup_script, ifname, fd))
 970             return -1;
 971     }
 972     s = net_tap_fd_init(vlan, model, name, fd);
 973     if (!s)
 974         return -1;
 975     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
 976              "ifname=%s,script=%s,downscript=%s",
 977              ifname, setup_script, down_script);
 978     if (down_script && strcmp(down_script, "no"))
 979         snprintf(s->down_script, sizeof(s->down_script), "%s", down_script);
 980     return 0;
 981 }
 982
 983 #endif /* !_WIN32 */
 984
 985 #if defined(CONFIG_VDE)
 986 typedef struct VDEState {
 987     VLANClientState *vc;
 988     VDECONN *vde;
 989 } VDEState;
 990
 991 static void vde_to_qemu(void *opaque)
 992 {
 993     VDEState *s = opaque;
 994     uint8_t buf[4096];
 995     int size;
 996
 997     size = vde_recv(s->vde, buf, sizeof(buf), 0);
 998     if (size > 0) {
 999         qemu_send_packet(s->vc, buf, size);
1000     }
1001 }
1002
1003 static void vde_from_qemu(void *opaque, const uint8_t *buf, int size)
1004 {
1005     VDEState *s = opaque;
1006     int ret;
1007     for(;;) {
1008         ret = vde_send(s->vde, buf, size, 0);
1009         if (ret < 0 && errno == EINTR) {
1010         } else {
1011             break;
1012         }
1013     }
1014 }
1015
1016 static int net_vde_init(VLANState *vlan, const char *model,
1017                         const char *name, const char *sock,
1018                         int port, const char *group, int mode)
1019 {
1020     VDEState *s;
1021     char *init_group = strlen(group) ? (char *)group : NULL;
1022     char *init_sock = strlen(sock) ? (char *)sock : NULL;
1023
1024     struct vde_open_args args = {
1025         .port = port,
1026         .group = init_group,
1027         .mode = mode,
1028     };
1029
1030     s = qemu_mallocz(sizeof(VDEState));
1031     if (!s)
1032         return -1;
1033     s->vde = vde_open(init_sock, "QEMU", &args);
1034     if (!s->vde){
1035         free(s);
1036         return -1;
1037     }
1038     s->vc = qemu_new_vlan_client(vlan, model, name, vde_from_qemu, NULL, s);
1039     qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
1040     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "sock=%s,fd=%d",
1041              sock, vde_datafd(s->vde));
1042     return 0;
1043 }
1044 #endif
1045
1046 /* network connection */
1047 typedef struct NetSocketState {
1048     VLANClientState *vc;
1049     int fd;
1050     int state; /* 0 = getting length, 1 = getting data */
1051     int index;
1052     int packet_len;
1053     uint8_t buf[4096];
1054     struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
1055 } NetSocketState;
1056
1057 typedef struct NetSocketListenState {
1058     VLANState *vlan;
1059     char *model;
1060     char *name;
1061     int fd;
1062 } NetSocketListenState;
1063
1064 /* XXX: we consider we can send the whole packet without blocking */
1065 static void net_socket_receive(void *opaque, const uint8_t *buf, int size)
1066 {
1067     NetSocketState *s = opaque;
1068     uint32_t len;
1069     len = htonl(size);
1070
1071     send_all(s->fd, (const uint8_t *)&len, sizeof(len));
1072     send_all(s->fd, buf, size);
1073 }
1074
1075 static void net_socket_receive_dgram(void *opaque, const uint8_t *buf, int size)
1076 {
1077     NetSocketState *s = opaque;
1078     sendto(s->fd, buf, size, 0,
1079            (struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst));
1080 }
1081
1082 static void net_socket_send(void *opaque)
1083 {
1084     NetSocketState *s = opaque;
1085     int l, size, err;
1086     uint8_t buf1[4096];
1087     const uint8_t *buf;
1088
1089     size = recv(s->fd, buf1, sizeof(buf1), 0);
1090     if (size < 0) {
1091         err = socket_error();
1092         if (err != EWOULDBLOCK)
1093             goto eoc;
1094     } else if (size == 0) {
1095         /* end of connection */
1096     eoc:
1097         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1098         closesocket(s->fd);
1099         return;
1100     }
1101     buf = buf1;
1102     while (size > 0) {
1103         /* reassemble a packet from the network */
1104         switch(s->state) {
1105         case 0:
1106             l = 4 - s->index;
1107             if (l > size)
1108                 l = size;
1109             memcpy(s->buf + s->index, buf, l);
1110             buf += l;
1111             size -= l;
1112             s->index += l;
1113             if (s->index == 4) {
1114                 /* got length */
1115                 s->packet_len = ntohl(*(uint32_t *)s->buf);
1116                 s->index = 0;
1117                 s->state = 1;
1118             }
1119             break;
1120         case 1:
1121             l = s->packet_len - s->index;
1122             if (l > size)
1123                 l = size;
1124             memcpy(s->buf + s->index, buf, l);
1125             s->index += l;
1126             buf += l;
1127             size -= l;
1128             if (s->index >= s->packet_len) {
1129                 qemu_send_packet(s->vc, s->buf, s->packet_len);
1130                 s->index = 0;
1131                 s->state = 0;
1132             }
1133             break;
1134         }
1135     }
1136 }
1137
1138 static void net_socket_send_dgram(void *opaque)
1139 {
1140     NetSocketState *s = opaque;
1141     int size;
1142
1143     size = recv(s->fd, s->buf, sizeof(s->buf), 0);
1144     if (size < 0)
1145         return;
1146     if (size == 0) {
1147         /* end of connection */
1148         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1149         return;
1150     }
1151     qemu_send_packet(s->vc, s->buf, size);
1152 }
1153
1154 static int net_socket_mcast_create(struct sockaddr_in *mcastaddr)
1155 {
1156     struct ip_mreq imr;
1157     int fd;
1158     int val, ret;
1159     if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
1160         fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n",
1161                 inet_ntoa(mcastaddr->sin_addr),
1162                 (int)ntohl(mcastaddr->sin_addr.s_addr));
1163         return -1;
1164
1165     }
1166     fd = socket(PF_INET, SOCK_DGRAM, 0);
1167     if (fd < 0) {
1168         perror("socket(PF_INET, SOCK_DGRAM)");
1169         return -1;
1170     }
1171
1172     val = 1;
1173     ret=setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
1174                    (const char *)&val, sizeof(val));
1175     if (ret < 0) {
1176         perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
1177         goto fail;
1178     }
1179
1180     ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
1181     if (ret < 0) {
1182         perror("bind");
1183         goto fail;
1184     }
1185
1186     /* Add host to multicast group */
1187     imr.imr_multiaddr = mcastaddr->sin_addr;
1188     imr.imr_interface.s_addr = htonl(INADDR_ANY);
1189
1190     ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1191                      (const char *)&imr, sizeof(struct ip_mreq));
1192     if (ret < 0) {
1193         perror("setsockopt(IP_ADD_MEMBERSHIP)");
1194         goto fail;
1195     }
1196
1197     /* Force mcast msgs to loopback (eg. several QEMUs in same host */
1198     val = 1;
1199     ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1200                    (const char *)&val, sizeof(val));
1201     if (ret < 0) {
1202         perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
1203         goto fail;
1204     }
1205
1206     socket_set_nonblock(fd);
1207     return fd;
1208 fail:
1209     if (fd >= 0)
1210         closesocket(fd);
1211     return -1;
1212 }
1213
1214 static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
1215                                                 const char *model,
1216                                                 const char *name,
1217                                                 int fd, int is_connected)
1218 {
1219     struct sockaddr_in saddr;
1220     int newfd;
1221     socklen_t saddr_len;
1222     NetSocketState *s;
1223
1224     /* fd passed: multicast: "learn" dgram_dst address from bound address and save it
1225      * Because this may be "shared" socket from a "master" process, datagrams would be recv()
1226      * by ONLY ONE process: we must "clone" this dgram socket --jjo
1227      */
1228
1229     if (is_connected) {
1230         if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
1231             /* must be bound */
1232             if (saddr.sin_addr.s_addr==0) {
1233                 fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, cannot setup multicast dst addr\n",
1234                         fd);
1235                 return NULL;
1236             }
1237             /* clone dgram socket */
1238             newfd = net_socket_mcast_create(&saddr);
1239             if (newfd < 0) {
1240                 /* error already reported by net_socket_mcast_create() */
1241                 close(fd);
1242                 return NULL;
1243             }
1244             /* clone newfd to fd, close newfd */
1245             dup2(newfd, fd);
1246             close(newfd);
1247
1248         } else {
1249             fprintf(stderr, "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
1250                     fd, strerror(errno));
1251             return NULL;
1252         }
1253     }
1254
1255     s = qemu_mallocz(sizeof(NetSocketState));
1256     if (!s)
1257         return NULL;
1258     s->fd = fd;
1259
1260     s->vc = qemu_new_vlan_client(vlan, model, name, net_socket_receive_dgram, NULL, s);
1261     qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s);
1262
1263     /* mcast: save bound address as dst */
1264     if (is_connected) s->dgram_dst=saddr;
1265
1266     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1267             "socket: fd=%d (%s mcast=%s:%d)",
1268             fd, is_connected? "cloned" : "",
1269             inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1270     return s;
1271 }
1272
1273 static void net_socket_connect(void *opaque)
1274 {
1275     NetSocketState *s = opaque;
1276     qemu_set_fd_handler(s->fd, net_socket_send, NULL, s);
1277 }
1278
1279 static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
1280                                                  const char *model,
1281                                                  const char *name,
1282                                                  int fd, int is_connected)
1283 {
1284     NetSocketState *s;
1285     s = qemu_mallocz(sizeof(NetSocketState));
1286     if (!s)
1287         return NULL;
1288     s->fd = fd;
1289     s->vc = qemu_new_vlan_client(vlan, model, name,
1290                                  net_socket_receive, NULL, s);
1291     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1292              "socket: fd=%d", fd);
1293     if (is_connected) {
1294         net_socket_connect(s);
1295     } else {
1296         qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
1297     }
1298     return s;
1299 }
1300
1301 static NetSocketState *net_socket_fd_init(VLANState *vlan,
1302                                           const char *model, const char *name,
1303                                           int fd, int is_connected)
1304 {
1305     int so_type=-1, optlen=sizeof(so_type);
1306
1307     if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type,
1308         (socklen_t *)&optlen)< 0) {
1309         fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n", fd);
1310         return NULL;
1311     }
1312     switch(so_type) {
1313     case SOCK_DGRAM:
1314         return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected);
1315     case SOCK_STREAM:
1316         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1317     default:
1318         /* who knows ... this could be a eg. a pty, do warn and continue as stream */
1319         fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
1320         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1321     }
1322     return NULL;
1323 }
1324
1325 static void net_socket_accept(void *opaque)
1326 {
1327     NetSocketListenState *s = opaque;
1328     NetSocketState *s1;
1329     struct sockaddr_in saddr;
1330     socklen_t len;
1331     int fd;
1332
1333     for(;;) {
1334         len = sizeof(saddr);
1335         fd = accept(s->fd, (struct sockaddr *)&saddr, &len);
1336         if (fd < 0 && errno != EINTR) {
1337             return;
1338         } else if (fd >= 0) {
1339             break;
1340         }
1341     }
1342     s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1);
1343     if (!s1) {
1344         closesocket(fd);
1345     } else {
1346         snprintf(s1->vc->info_str, sizeof(s1->vc->info_str),
1347                  "socket: connection from %s:%d",
1348                  inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1349     }
1350 }
1351
1352 static int net_socket_listen_init(VLANState *vlan,
1353                                   const char *model,
1354                                   const char *name,
1355                                   const char *host_str)
1356 {
1357     NetSocketListenState *s;
1358     int fd, val, ret;
1359     struct sockaddr_in saddr;
1360
1361     if (parse_host_port(&saddr, host_str) < 0)
1362         return -1;
1363
1364     s = qemu_mallocz(sizeof(NetSocketListenState));
1365     if (!s)
1366         return -1;
1367
1368     fd = socket(PF_INET, SOCK_STREAM, 0);
1369     if (fd < 0) {
1370         perror("socket");
1371         return -1;
1372     }
1373     socket_set_nonblock(fd);
1374
1375     /* allow fast reuse */
1376     val = 1;
1377     setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));
1378
1379     ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
1380     if (ret < 0) {
1381         perror("bind");
1382         return -1;
1383     }
1384     ret = listen(fd, 0);
1385     if (ret < 0) {
1386         perror("listen");
1387         return -1;
1388     }
1389     s->vlan = vlan;
1390     s->model = strdup(model);
1391     s->name = strdup(name);
1392     s->fd = fd;
1393     qemu_set_fd_handler(fd, net_socket_accept, NULL, s);
1394     return 0;
1395 }
1396
1397 static int net_socket_connect_init(VLANState *vlan,
1398                                    const char *model,
1399                                    const char *name,
1400                                    const char *host_str)
1401 {
1402     NetSocketState *s;
1403     int fd, connected, ret, err;
1404     struct sockaddr_in saddr;
1405
1406     if (parse_host_port(&saddr, host_str) < 0)
1407         return -1;
1408
1409     fd = socket(PF_INET, SOCK_STREAM, 0);
1410     if (fd < 0) {
1411         perror("socket");
1412         return -1;
1413     }
1414     socket_set_nonblock(fd);
1415
1416     connected = 0;
1417     for(;;) {
1418         ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
1419         if (ret < 0) {
1420             err = socket_error();
1421             if (err == EINTR || err == EWOULDBLOCK) {
1422             } else if (err == EINPROGRESS) {
1423                 break;
1424 #ifdef _WIN32
1425             } else if (err == WSAEALREADY) {
1426                 break;
1427 #endif
1428             } else {
1429                 perror("connect");
1430                 closesocket(fd);
1431                 return -1;
1432             }
1433         } else {
1434             connected = 1;
1435             break;
1436         }
1437     }
1438     s = net_socket_fd_init(vlan, model, name, fd, connected);
1439     if (!s)
1440         return -1;
1441     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1442              "socket: connect to %s:%d",
1443              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1444     return 0;
1445 }
1446
1447 static int net_socket_mcast_init(VLANState *vlan,
1448                                  const char *model,
1449                                  const char *name,
1450                                  const char *host_str)
1451 {
1452     NetSocketState *s;
1453     int fd;
1454     struct sockaddr_in saddr;
1455
1456     if (parse_host_port(&saddr, host_str) < 0)
1457         return -1;
1458
1459
1460     fd = net_socket_mcast_create(&saddr);
1461     if (fd < 0)
1462         return -1;
1463
1464     s = net_socket_fd_init(vlan, model, name, fd, 0);
1465     if (!s)
1466         return -1;
1467
1468     s->dgram_dst = saddr;
1469
1470     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1471              "socket: mcast=%s:%d",
1472              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1473     return 0;
1474
1475 }
1476
1477 /* find or alloc a new VLAN */
1478 VLANState *qemu_find_vlan(int id)
1479 {
1480     VLANState **pvlan, *vlan;
1481     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1482         if (vlan->id == id)
1483             return vlan;
1484     }
1485     vlan = qemu_mallocz(sizeof(VLANState));
1486     if (!vlan)
1487         return NULL;
1488     vlan->id = id;
1489     vlan->next = NULL;
1490     pvlan = &first_vlan;
1491     while (*pvlan != NULL)
1492         pvlan = &(*pvlan)->next;
1493     *pvlan = vlan;
1494     return vlan;
1495 }
1496
1497 int net_client_init(const char *device, const char *p)
1498 {
1499     char buf[1024];
1500     int vlan_id, ret;
1501     VLANState *vlan;
1502     char *name = NULL;
1503
1504     vlan_id = 0;
1505     if (get_param_value(buf, sizeof(buf), "vlan", p)) {
1506         vlan_id = strtol(buf, NULL, 0);
1507     }
1508     vlan = qemu_find_vlan(vlan_id);
1509     if (!vlan) {
1510         fprintf(stderr, "Could not create vlan %d\n", vlan_id);
1511         return -1;
1512     }
1513     if (get_param_value(buf, sizeof(buf), "name", p)) {
1514         name = strdup(buf);
1515     }
1516     if (!strcmp(device, "nic")) {
1517         NICInfo *nd;
1518         uint8_t *macaddr;
1519
1520         if (nb_nics >= MAX_NICS) {
1521             fprintf(stderr, "Too Many NICs\n");
1522             return -1;
1523         }
1524         nd = &nd_table[nb_nics];
1525         macaddr = nd->macaddr;
1526         macaddr[0] = 0x52;
1527         macaddr[1] = 0x54;
1528         macaddr[2] = 0x00;
1529         macaddr[3] = 0x12;
1530         macaddr[4] = 0x34;
1531         macaddr[5] = 0x56 + nb_nics;
1532
1533         if (get_param_value(buf, sizeof(buf), "macaddr", p)) {
1534             if (parse_macaddr(macaddr, buf) < 0) {
1535                 fprintf(stderr, "invalid syntax for ethernet address\n");
1536                 return -1;
1537             }
1538         }
1539         if (get_param_value(buf, sizeof(buf), "model", p)) {
1540             nd->model = strdup(buf);
1541         }
1542         nd->vlan = vlan;
1543         nd->name = name;
1544         name = NULL;
1545         nb_nics++;
1546         vlan->nb_guest_devs++;
1547         ret = 0;
1548     } else
1549     if (!strcmp(device, "none")) {
1550         /* does nothing. It is needed to signal that no network cards
1551            are wanted */
1552         ret = 0;
1553     } else
1554 #ifdef CONFIG_SLIRP
1555     if (!strcmp(device, "user")) {
1556         if (get_param_value(buf, sizeof(buf), "hostname", p)) {
1557             pstrcpy(slirp_hostname, sizeof(slirp_hostname), buf);
1558         }
1559         if (get_param_value(buf, sizeof(buf), "restrict", p)) {
1560             slirp_restrict = (buf[0] == 'y') ? 1 : 0;
1561         }
1562         if (get_param_value(buf, sizeof(buf), "ip", p)) {
1563             slirp_ip = strdup(buf);
1564         }
1565         vlan->nb_host_devs++;
1566         ret = net_slirp_init(vlan, device, name);
1567     } else
1568 #endif
1569 #ifdef _WIN32
1570     if (!strcmp(device, "tap")) {
1571         char ifname[64];
1572         if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
1573             fprintf(stderr, "tap: no interface name\n");
1574             return -1;
1575         }
1576         vlan->nb_host_devs++;
1577         ret = tap_win32_init(vlan, device, name, ifname);
1578     } else
1579 #elif defined (_AIX)
1580 #else
1581     if (!strcmp(device, "tap")) {
1582         char ifname[64];
1583         char setup_script[1024], down_script[1024];
1584         int fd;
1585         vlan->nb_host_devs++;
1586         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
1587             fd = strtol(buf, NULL, 0);
1588             fcntl(fd, F_SETFL, O_NONBLOCK);
1589             ret = -1;
1590             if (net_tap_fd_init(vlan, device, name, fd))
1591                 ret = 0;
1592         } else {
1593             if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
1594                 ifname[0] = '\0';
1595             }
1596             if (get_param_value(setup_script, sizeof(setup_script), "script", p) == 0) {
1597                 pstrcpy(setup_script, sizeof(setup_script), DEFAULT_NETWORK_SCRIPT);
1598             }
1599             if (get_param_value(down_script, sizeof(down_script), "downscript", p) == 0) {
1600                 pstrcpy(down_script, sizeof(down_script), DEFAULT_NETWORK_DOWN_SCRIPT);
1601             }
1602             ret = net_tap_init(vlan, device, name, ifname, setup_script, down_script);
1603         }
1604     } else
1605 #endif
1606     if (!strcmp(device, "socket")) {
1607         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
1608             int fd;
1609             fd = strtol(buf, NULL, 0);
1610             ret = -1;
1611             if (net_socket_fd_init(vlan, device, name, fd, 1))
1612                 ret = 0;
1613         } else if (get_param_value(buf, sizeof(buf), "listen", p) > 0) {
1614             ret = net_socket_listen_init(vlan, device, name, buf);
1615         } else if (get_param_value(buf, sizeof(buf), "connect", p) > 0) {
1616             ret = net_socket_connect_init(vlan, device, name, buf);
1617         } else if (get_param_value(buf, sizeof(buf), "mcast", p) > 0) {
1618             ret = net_socket_mcast_init(vlan, device, name, buf);
1619         } else {
1620             fprintf(stderr, "Unknown socket options: %s\n", p);
1621             return -1;
1622         }
1623         vlan->nb_host_devs++;
1624     } else
1625 #ifdef CONFIG_VDE
1626     if (!strcmp(device, "vde")) {
1627         char vde_sock[1024], vde_group[512];
1628         int vde_port, vde_mode;
1629         vlan->nb_host_devs++;
1630         if (get_param_value(vde_sock, sizeof(vde_sock), "sock", p) <= 0) {
1631             vde_sock[0] = '\0';
1632         }
1633         if (get_param_value(buf, sizeof(buf), "port", p) > 0) {
1634             vde_port = strtol(buf, NULL, 10);
1635         } else {
1636             vde_port = 0;
1637         }
1638         if (get_param_value(vde_group, sizeof(vde_group), "group", p) <= 0) {
1639             vde_group[0] = '\0';
1640         }
1641         if (get_param_value(buf, sizeof(buf), "mode", p) > 0) {
1642             vde_mode = strtol(buf, NULL, 8);
1643         } else {
1644             vde_mode = 0700;
1645         }
1646         ret = net_vde_init(vlan, device, name, vde_sock, vde_port, vde_group, vde_mode);
1647     } else
1648 #endif
1649     {
1650         fprintf(stderr, "Unknown network device: %s\n", device);
1651         if (name)
1652             free(name);
1653         return -1;
1654     }
1655     if (ret < 0) {
1656         fprintf(stderr, "Could not initialize device '%s'\n", device);
1657     }
1658     if (name)
1659         free(name);
1660     return ret;
1661 }
1662
1663 int net_client_parse(const char *str)
1664 {
1665     const char *p;
1666     char *q;
1667     char device[64];
1668
1669     p = str;
1670     q = device;
1671     while (*p != '\0' && *p != ',') {
1672         if ((q - device) < sizeof(device) - 1)
1673             *q++ = *p;
1674         p++;
1675     }
1676     *q = '\0';
1677     if (*p == ',')
1678         p++;
1679
1680     return net_client_init(device, p);
1681 }
1682
1683 void do_info_network(void)
1684 {
1685     VLANState *vlan;
1686     VLANClientState *vc;
1687
1688     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1689         term_printf("VLAN %d devices:\n", vlan->id);
1690         for(vc = vlan->first_client; vc != NULL; vc = vc->next)
1691             term_printf("  %s: %s\n", vc->name, vc->info_str);
1692     }
1693 }
1694
1695 void net_cleanup(void)
1696 {
1697     VLANState *vlan;
1698
1699 #if !defined(_WIN32)
1700     /* close network clients */
1701     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1702         VLANClientState *vc;
1703
1704         for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
1705             if (vc->fd_read == tap_receive) {
1706                 char ifname[64];
1707                 TAPState *s = vc->opaque;
1708
1709                 if (strcmp(vc->model, "tap") == 0 &&
1710                     sscanf(vc->info_str, "ifname=%63s ", ifname) == 1 &&
1711                     s->down_script[0])
1712                     launch_script(s->down_script, ifname, s->fd);
1713             }
1714 #if defined(CONFIG_VDE)
1715             if (vc->fd_read == vde_from_qemu) {
1716                 VDEState *s = vc->opaque;
1717                 vde_close(s->vde);
1718             }
1719 #endif
1720         }
1721     }
1722 #endif
1723 }
1724
1725 void net_client_check(void)
1726 {
1727     VLANState *vlan;
1728
1729     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1730         if (vlan->nb_guest_devs == 0 && vlan->nb_host_devs == 0)
1731             continue;
1732         if (vlan->nb_guest_devs == 0)
1733             fprintf(stderr, "Warning: vlan %d with no nics\n", vlan->id);
1734         if (vlan->nb_host_devs == 0)
1735             fprintf(stderr,
1736                     "Warning: vlan %d is not connected to host network\n",
1737                     vlan->id);
1738     }
1739 }