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     if (vc1->link_down)
 391         return;
 392
 393 #ifdef DEBUG_NET
 394     printf("vlan %d send:\n", vlan->id);
 395     hex_dump(stdout, buf, size);
 396 #endif
 397     for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
 398         if (vc != vc1 && !vc->link_down) {
 399             vc->fd_read(vc->opaque, buf, size);
 400         }
 401     }
 402 }
 403
 404 static ssize_t vc_sendv_compat(VLANClientState *vc, const struct iovec *iov,
 405                                int iovcnt)
 406 {
 407     uint8_t buffer[4096];
 408     size_t offset = 0;
 409     int i;
 410
 411     for (i = 0; i < iovcnt; i++) {
 412         size_t len;
 413
 414         len = MIN(sizeof(buffer) - offset, iov[i].iov_len);
 415         memcpy(buffer + offset, iov[i].iov_base, len);
 416         offset += len;
 417     }
 418
 419     vc->fd_read(vc->opaque, buffer, offset);
 420
 421     return offset;
 422 }
 423
 424 ssize_t qemu_sendv_packet(VLANClientState *vc1, const struct iovec *iov,
 425                           int iovcnt)
 426 {
 427     VLANState *vlan = vc1->vlan;
 428     VLANClientState *vc;
 429     ssize_t max_len = 0;
 430
 431     for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
 432         ssize_t len = 0;
 433
 434         if (vc == vc1)
 435             continue;
 436
 437         if (vc->fd_readv)
 438             len = vc->fd_readv(vc->opaque, iov, iovcnt);
 439         else if (vc->fd_read)
 440             len = vc_sendv_compat(vc, iov, iovcnt);
 441
 442         max_len = MAX(max_len, len);
 443     }
 444
 445     return max_len;
 446 }
 447
 448 #if defined(CONFIG_SLIRP)
 449
 450 /* slirp network adapter */
 451
 452 static int slirp_inited;
 453 static int slirp_restrict;
 454 static char *slirp_ip;
 455 static VLANClientState *slirp_vc;
 456
 457 int slirp_can_output(void)
 458 {
 459     return !slirp_vc || qemu_can_send_packet(slirp_vc);
 460 }
 461
 462 void slirp_output(const uint8_t *pkt, int pkt_len)
 463 {
 464 #ifdef DEBUG_SLIRP
 465     printf("slirp output:\n");
 466     hex_dump(stdout, pkt, pkt_len);
 467 #endif
 468     if (!slirp_vc)
 469         return;
 470     qemu_send_packet(slirp_vc, pkt, pkt_len);
 471 }
 472
 473 int slirp_is_inited(void)
 474 {
 475     return slirp_inited;
 476 }
 477
 478 static void slirp_receive(void *opaque, const uint8_t *buf, int size)
 479 {
 480 #ifdef DEBUG_SLIRP
 481     printf("slirp input:\n");
 482     hex_dump(stdout, buf, size);
 483 #endif
 484     slirp_input(buf, size);
 485 }
 486
 487 static int net_slirp_init(VLANState *vlan, const char *model, const char *name)
 488 {
 489     if (!slirp_inited) {
 490         slirp_inited = 1;
 491         slirp_init(slirp_restrict, slirp_ip);
 492     }
 493     slirp_vc = qemu_new_vlan_client(vlan, model, name,
 494                                     slirp_receive, NULL, NULL);
 495     slirp_vc->info_str[0] = '\0';
 496     return 0;
 497 }
 498
 499 void net_slirp_redir(const char *redir_str)
 500 {
 501     int is_udp;
 502     char buf[256], *r;
 503     const char *p;
 504     struct in_addr guest_addr;
 505     int host_port, guest_port;
 506
 507     if (!slirp_inited) {
 508         slirp_inited = 1;
 509         slirp_init(slirp_restrict, slirp_ip);
 510     }
 511
 512     p = redir_str;
 513     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 514         goto fail;
 515     if (!strcmp(buf, "tcp")) {
 516         is_udp = 0;
 517     } else if (!strcmp(buf, "udp")) {
 518         is_udp = 1;
 519     } else {
 520         goto fail;
 521     }
 522
 523     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 524         goto fail;
 525     host_port = strtol(buf, &r, 0);
 526     if (r == buf)
 527         goto fail;
 528
 529     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 530         goto fail;
 531     if (buf[0] == '\0') {
 532         pstrcpy(buf, sizeof(buf), "10.0.2.15");
 533     }
 534     if (!inet_aton(buf, &guest_addr))
 535         goto fail;
 536
 537     guest_port = strtol(p, &r, 0);
 538     if (r == p)
 539         goto fail;
 540
 541     if (slirp_redir(is_udp, host_port, guest_addr, guest_port) < 0) {
 542         fprintf(stderr, "qemu: could not set up redirection\n");
 543         exit(1);
 544     }
 545     return;
 546  fail:
 547     fprintf(stderr, "qemu: syntax: -redir [tcp|udp]:host-port:[guest-host]:guest-port\n");
 548     exit(1);
 549 }
 550
 551 #ifndef _WIN32
 552
 553 static char smb_dir[1024];
 554
 555 static void erase_dir(char *dir_name)
 556 {
 557     DIR *d;
 558     struct dirent *de;
 559     char filename[1024];
 560
 561     /* erase all the files in the directory */
 562     if ((d = opendir(dir_name)) != 0) {
 563         for(;;) {
 564             de = readdir(d);
 565             if (!de)
 566                 break;
 567             if (strcmp(de->d_name, ".") != 0 &&
 568                 strcmp(de->d_name, "..") != 0) {
 569                 snprintf(filename, sizeof(filename), "%s/%s",
 570                          smb_dir, de->d_name);
 571                 if (unlink(filename) != 0)  /* is it a directory? */
 572                     erase_dir(filename);
 573             }
 574         }
 575         closedir(d);
 576         rmdir(dir_name);
 577     }
 578 }
 579
 580 /* automatic user mode samba server configuration */
 581 static void smb_exit(void)
 582 {
 583     erase_dir(smb_dir);
 584 }
 585
 586 /* automatic user mode samba server configuration */
 587 void net_slirp_smb(const char *exported_dir)
 588 {
 589     char smb_conf[1024];
 590     char smb_cmdline[1024];
 591     FILE *f;
 592
 593     if (!slirp_inited) {
 594         slirp_inited = 1;
 595         slirp_init(slirp_restrict, slirp_ip);
 596     }
 597
 598     /* XXX: better tmp dir construction */
 599     snprintf(smb_dir, sizeof(smb_dir), "/tmp/qemu-smb.%d", getpid());
 600     if (mkdir(smb_dir, 0700) < 0) {
 601         fprintf(stderr, "qemu: could not create samba server dir '%s'\n", smb_dir);
 602         exit(1);
 603     }
 604     snprintf(smb_conf, sizeof(smb_conf), "%s/%s", smb_dir, "smb.conf");
 605
 606     f = fopen(smb_conf, "w");
 607     if (!f) {
 608         fprintf(stderr, "qemu: could not create samba server configuration file '%s'\n", smb_conf);
 609         exit(1);
 610     }
 611     fprintf(f,
 612             "[global]\n"
 613             "private dir=%s\n"
 614             "smb ports=0\n"
 615             "socket address=127.0.0.1\n"
 616             "pid directory=%s\n"
 617             "lock directory=%s\n"
 618             "log file=%s/log.smbd\n"
 619             "smb passwd file=%s/smbpasswd\n"
 620             "security = share\n"
 621             "[qemu]\n"
 622             "path=%s\n"
 623             "read only=no\n"
 624             "guest ok=yes\n",
 625             smb_dir,
 626             smb_dir,
 627             smb_dir,
 628             smb_dir,
 629             smb_dir,
 630             exported_dir
 631             );
 632     fclose(f);
 633     atexit(smb_exit);
 634
 635     snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -s %s",
 636              SMBD_COMMAND, smb_conf);
 637
 638     slirp_add_exec(0, smb_cmdline, 4, 139);
 639 }
 640
 641 #endif /* !defined(_WIN32) */
 642 void do_info_slirp(void)
 643 {
 644     slirp_stats();
 645 }
 646
 647 #endif /* CONFIG_SLIRP */
 648
 649 #if !defined(_WIN32)
 650
 651 typedef struct TAPState {
 652     VLANClientState *vc;
 653     int fd;
 654     char down_script[1024];
 655 } TAPState;
 656
 657 #ifdef HAVE_IOVEC
 658 static ssize_t tap_receive_iov(void *opaque, const struct iovec *iov,
 659                                int iovcnt)
 660 {
 661     TAPState *s = opaque;
 662     ssize_t len;
 663
 664     do {
 665         len = writev(s->fd, iov, iovcnt);
 666     } while (len == -1 && (errno == EINTR || errno == EAGAIN));
 667
 668     return len;
 669 }
 670 #endif
 671
 672 static void tap_receive(void *opaque, const uint8_t *buf, int size)
 673 {
 674     TAPState *s = opaque;
 675     int ret;
 676     for(;;) {
 677         ret = write(s->fd, buf, size);
 678         if (ret < 0 && (errno == EINTR || errno == EAGAIN)) {
 679         } else {
 680             break;
 681         }
 682     }
 683 }
 684
 685 static void tap_send(void *opaque)
 686 {
 687     TAPState *s = opaque;
 688     uint8_t buf[4096];
 689     int size;
 690
 691 #ifdef __sun__
 692     struct strbuf sbuf;
 693     int f = 0;
 694     sbuf.maxlen = sizeof(buf);
 695     sbuf.buf = buf;
 696     size = getmsg(s->fd, NULL, &sbuf, &f) >=0 ? sbuf.len : -1;
 697 #else
 698     size = read(s->fd, buf, sizeof(buf));
 699 #endif
 700     if (size > 0) {
 701         qemu_send_packet(s->vc, buf, size);
 702     }
 703 }
 704
 705 /* fd support */
 706
 707 static TAPState *net_tap_fd_init(VLANState *vlan,
 708                                  const char *model,
 709                                  const char *name,
 710                                  int fd)
 711 {
 712     TAPState *s;
 713
 714     s = qemu_mallocz(sizeof(TAPState));
 715     if (!s)
 716         return NULL;
 717     s->fd = fd;
 718     s->vc = qemu_new_vlan_client(vlan, model, name, tap_receive, NULL, s);
 719 #ifdef HAVE_IOVEC
 720     s->vc->fd_readv = tap_receive_iov;
 721 #endif
 722     qemu_set_fd_handler(s->fd, tap_send, NULL, s);
 723     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "fd=%d", fd);
 724     return s;
 725 }
 726
 727 #if defined (_BSD) || defined (__FreeBSD_kernel__)
 728 static int tap_open(char *ifname, int ifname_size)
 729 {
 730     int fd;
 731     char *dev;
 732     struct stat s;
 733
 734     TFR(fd = open("/dev/tap", O_RDWR));
 735     if (fd < 0) {
 736         fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n");
 737         return -1;
 738     }
 739
 740     fstat(fd, &s);
 741     dev = devname(s.st_rdev, S_IFCHR);
 742     pstrcpy(ifname, ifname_size, dev);
 743
 744     fcntl(fd, F_SETFL, O_NONBLOCK);
 745     return fd;
 746 }
 747 #elif defined(__sun__)
 748 #define TUNNEWPPA       (('T'<<16) | 0x0001)
 749 /*
 750  * Allocate TAP device, returns opened fd.
 751  * Stores dev name in the first arg(must be large enough).
 752  */
 753 int tap_alloc(char *dev, size_t dev_size)
 754 {
 755     int tap_fd, if_fd, ppa = -1;
 756     static int ip_fd = 0;
 757     char *ptr;
 758
 759     static int arp_fd = 0;
 760     int ip_muxid, arp_muxid;
 761     struct strioctl  strioc_if, strioc_ppa;
 762     int link_type = I_PLINK;;
 763     struct lifreq ifr;
 764     char actual_name[32] = "";
 765
 766     memset(&ifr, 0x0, sizeof(ifr));
 767
 768     if( *dev ){
 769        ptr = dev;
 770        while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
 771        ppa = atoi(ptr);
 772     }
 773
 774     /* Check if IP device was opened */
 775     if( ip_fd )
 776        close(ip_fd);
 777
 778     TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
 779     if (ip_fd < 0) {
 780        syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)");
 781        return -1;
 782     }
 783
 784     TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
 785     if (tap_fd < 0) {
 786        syslog(LOG_ERR, "Can't open /dev/tap");
 787        return -1;
 788     }
 789
 790     /* Assign a new PPA and get its unit number. */
 791     strioc_ppa.ic_cmd = TUNNEWPPA;
 792     strioc_ppa.ic_timout = 0;
 793     strioc_ppa.ic_len = sizeof(ppa);
 794     strioc_ppa.ic_dp = (char *)&ppa;
 795     if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
 796        syslog (LOG_ERR, "Can't assign new interface");
 797
 798     TFR(if_fd = open("/dev/tap", O_RDWR, 0));
 799     if (if_fd < 0) {
 800        syslog(LOG_ERR, "Can't open /dev/tap (2)");
 801        return -1;
 802     }
 803     if(ioctl(if_fd, I_PUSH, "ip") < 0){
 804        syslog(LOG_ERR, "Can't push IP module");
 805        return -1;
 806     }
 807
 808     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
 809         syslog(LOG_ERR, "Can't get flags\n");
 810
 811     snprintf (actual_name, 32, "tap%d", ppa);
 812     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
 813
 814     ifr.lifr_ppa = ppa;
 815     /* Assign ppa according to the unit number returned by tun device */
 816
 817     if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
 818         syslog (LOG_ERR, "Can't set PPA %d", ppa);
 819     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
 820         syslog (LOG_ERR, "Can't get flags\n");
 821     /* Push arp module to if_fd */
 822     if (ioctl (if_fd, I_PUSH, "arp") < 0)
 823         syslog (LOG_ERR, "Can't push ARP module (2)");
 824
 825     /* Push arp module to ip_fd */
 826     if (ioctl (ip_fd, I_POP, NULL) < 0)
 827         syslog (LOG_ERR, "I_POP failed\n");
 828     if (ioctl (ip_fd, I_PUSH, "arp") < 0)
 829         syslog (LOG_ERR, "Can't push ARP module (3)\n");
 830     /* Open arp_fd */
 831     TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
 832     if (arp_fd < 0)
 833        syslog (LOG_ERR, "Can't open %s\n", "/dev/tap");
 834
 835     /* Set ifname to arp */
 836     strioc_if.ic_cmd = SIOCSLIFNAME;
 837     strioc_if.ic_timout = 0;
 838     strioc_if.ic_len = sizeof(ifr);
 839     strioc_if.ic_dp = (char *)&ifr;
 840     if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
 841         syslog (LOG_ERR, "Can't set ifname to arp\n");
 842     }
 843
 844     if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
 845        syslog(LOG_ERR, "Can't link TAP device to IP");
 846        return -1;
 847     }
 848
 849     if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
 850         syslog (LOG_ERR, "Can't link TAP device to ARP");
 851
 852     close (if_fd);
 853
 854     memset(&ifr, 0x0, sizeof(ifr));
 855     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
 856     ifr.lifr_ip_muxid  = ip_muxid;
 857     ifr.lifr_arp_muxid = arp_muxid;
 858
 859     if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
 860     {
 861       ioctl (ip_fd, I_PUNLINK , arp_muxid);
 862       ioctl (ip_fd, I_PUNLINK, ip_muxid);
 863       syslog (LOG_ERR, "Can't set multiplexor id");
 864     }
 865
 866     snprintf(dev, dev_size, "tap%d", ppa);
 867     return tap_fd;
 868 }
 869
 870 static int tap_open(char *ifname, int ifname_size)
 871 {
 872     char  dev[10]="";
 873     int fd;
 874     if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){
 875        fprintf(stderr, "Cannot allocate TAP device\n");
 876        return -1;
 877     }
 878     pstrcpy(ifname, ifname_size, dev);
 879     fcntl(fd, F_SETFL, O_NONBLOCK);
 880     return fd;
 881 }
 882 #elif defined (_AIX)
 883 static int tap_open(char *ifname, int ifname_size)
 884 {
 885     fprintf (stderr, "no tap on AIX\n");
 886     return -1;
 887 }
 888 #else
 889 static int tap_open(char *ifname, int ifname_size)
 890 {
 891     struct ifreq ifr;
 892     int fd, ret;
 893
 894     TFR(fd = open("/dev/net/tun", O_RDWR));
 895     if (fd < 0) {
 896         fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n");
 897         return -1;
 898     }
 899     memset(&ifr, 0, sizeof(ifr));
 900     ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
 901     if (ifname[0] != '\0')
 902         pstrcpy(ifr.ifr_name, IFNAMSIZ, ifname);
 903     else
 904         pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d");
 905     ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
 906     if (ret != 0) {
 907         fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n");
 908         close(fd);
 909         return -1;
 910     }
 911     pstrcpy(ifname, ifname_size, ifr.ifr_name);
 912     fcntl(fd, F_SETFL, O_NONBLOCK);
 913     return fd;
 914 }
 915 #endif
 916
 917 static int launch_script(const char *setup_script, const char *ifname, int fd)
 918 {
 919     int pid, status;
 920     char *args[3];
 921     char **parg;
 922
 923         /* try to launch network script */
 924         pid = fork();
 925         if (pid >= 0) {
 926             if (pid == 0) {
 927                 int open_max = sysconf (_SC_OPEN_MAX), i;
 928                 for (i = 0; i < open_max; i++)
 929                     if (i != STDIN_FILENO &&
 930                         i != STDOUT_FILENO &&
 931                         i != STDERR_FILENO &&
 932                         i != fd)
 933                         close(i);
 934
 935                 parg = args;
 936                 *parg++ = (char *)setup_script;
 937                 *parg++ = (char *)ifname;
 938                 *parg++ = NULL;
 939                 execv(setup_script, args);
 940                 _exit(1);
 941             }
 942             while (waitpid(pid, &status, 0) != pid);
 943             if (!WIFEXITED(status) ||
 944                 WEXITSTATUS(status) != 0) {
 945                 fprintf(stderr, "%s: could not launch network script\n",
 946                         setup_script);
 947                 return -1;
 948             }
 949         }
 950     return 0;
 951 }
 952
 953 static int net_tap_init(VLANState *vlan, const char *model,
 954                         const char *name, const char *ifname1,
 955                         const char *setup_script, const char *down_script)
 956 {
 957     TAPState *s;
 958     int fd;
 959     char ifname[128];
 960
 961     if (ifname1 != NULL)
 962         pstrcpy(ifname, sizeof(ifname), ifname1);
 963     else
 964         ifname[0] = '\0';
 965     TFR(fd = tap_open(ifname, sizeof(ifname)));
 966     if (fd < 0)
 967         return -1;
 968
 969     if (!setup_script || !strcmp(setup_script, "no"))
 970         setup_script = "";
 971     if (setup_script[0] != '\0') {
 972         if (launch_script(setup_script, ifname, fd))
 973             return -1;
 974     }
 975     s = net_tap_fd_init(vlan, model, name, fd);
 976     if (!s)
 977         return -1;
 978     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
 979              "ifname=%s,script=%s,downscript=%s",
 980              ifname, setup_script, down_script);
 981     if (down_script && strcmp(down_script, "no"))
 982         snprintf(s->down_script, sizeof(s->down_script), "%s", down_script);
 983     return 0;
 984 }
 985
 986 #endif /* !_WIN32 */
 987
 988 #if defined(CONFIG_VDE)
 989 typedef struct VDEState {
 990     VLANClientState *vc;
 991     VDECONN *vde;
 992 } VDEState;
 993
 994 static void vde_to_qemu(void *opaque)
 995 {
 996     VDEState *s = opaque;
 997     uint8_t buf[4096];
 998     int size;
 999
1000     size = vde_recv(s->vde, buf, sizeof(buf), 0);
1001     if (size > 0) {
1002         qemu_send_packet(s->vc, buf, size);
1003     }
1004 }
1005
1006 static void vde_from_qemu(void *opaque, const uint8_t *buf, int size)
1007 {
1008     VDEState *s = opaque;
1009     int ret;
1010     for(;;) {
1011         ret = vde_send(s->vde, buf, size, 0);
1012         if (ret < 0 && errno == EINTR) {
1013         } else {
1014             break;
1015         }
1016     }
1017 }
1018
1019 static int net_vde_init(VLANState *vlan, const char *model,
1020                         const char *name, const char *sock,
1021                         int port, const char *group, int mode)
1022 {
1023     VDEState *s;
1024     char *init_group = strlen(group) ? (char *)group : NULL;
1025     char *init_sock = strlen(sock) ? (char *)sock : NULL;
1026
1027     struct vde_open_args args = {
1028         .port = port,
1029         .group = init_group,
1030         .mode = mode,
1031     };
1032
1033     s = qemu_mallocz(sizeof(VDEState));
1034     if (!s)
1035         return -1;
1036     s->vde = vde_open(init_sock, "QEMU", &args);
1037     if (!s->vde){
1038         free(s);
1039         return -1;
1040     }
1041     s->vc = qemu_new_vlan_client(vlan, model, name, vde_from_qemu, NULL, s);
1042     qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
1043     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "sock=%s,fd=%d",
1044              sock, vde_datafd(s->vde));
1045     return 0;
1046 }
1047 #endif
1048
1049 /* network connection */
1050 typedef struct NetSocketState {
1051     VLANClientState *vc;
1052     int fd;
1053     int state; /* 0 = getting length, 1 = getting data */
1054     int index;
1055     int packet_len;
1056     uint8_t buf[4096];
1057     struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
1058 } NetSocketState;
1059
1060 typedef struct NetSocketListenState {
1061     VLANState *vlan;
1062     char *model;
1063     char *name;
1064     int fd;
1065 } NetSocketListenState;
1066
1067 /* XXX: we consider we can send the whole packet without blocking */
1068 static void net_socket_receive(void *opaque, const uint8_t *buf, int size)
1069 {
1070     NetSocketState *s = opaque;
1071     uint32_t len;
1072     len = htonl(size);
1073
1074     send_all(s->fd, (const uint8_t *)&len, sizeof(len));
1075     send_all(s->fd, buf, size);
1076 }
1077
1078 static void net_socket_receive_dgram(void *opaque, const uint8_t *buf, int size)
1079 {
1080     NetSocketState *s = opaque;
1081     sendto(s->fd, buf, size, 0,
1082            (struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst));
1083 }
1084
1085 static void net_socket_send(void *opaque)
1086 {
1087     NetSocketState *s = opaque;
1088     int l, size, err;
1089     uint8_t buf1[4096];
1090     const uint8_t *buf;
1091
1092     size = recv(s->fd, buf1, sizeof(buf1), 0);
1093     if (size < 0) {
1094         err = socket_error();
1095         if (err != EWOULDBLOCK)
1096             goto eoc;
1097     } else if (size == 0) {
1098         /* end of connection */
1099     eoc:
1100         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1101         closesocket(s->fd);
1102         return;
1103     }
1104     buf = buf1;
1105     while (size > 0) {
1106         /* reassemble a packet from the network */
1107         switch(s->state) {
1108         case 0:
1109             l = 4 - s->index;
1110             if (l > size)
1111                 l = size;
1112             memcpy(s->buf + s->index, buf, l);
1113             buf += l;
1114             size -= l;
1115             s->index += l;
1116             if (s->index == 4) {
1117                 /* got length */
1118                 s->packet_len = ntohl(*(uint32_t *)s->buf);
1119                 s->index = 0;
1120                 s->state = 1;
1121             }
1122             break;
1123         case 1:
1124             l = s->packet_len - s->index;
1125             if (l > size)
1126                 l = size;
1127             memcpy(s->buf + s->index, buf, l);
1128             s->index += l;
1129             buf += l;
1130             size -= l;
1131             if (s->index >= s->packet_len) {
1132                 qemu_send_packet(s->vc, s->buf, s->packet_len);
1133                 s->index = 0;
1134                 s->state = 0;
1135             }
1136             break;
1137         }
1138     }
1139 }
1140
1141 static void net_socket_send_dgram(void *opaque)
1142 {
1143     NetSocketState *s = opaque;
1144     int size;
1145
1146     size = recv(s->fd, s->buf, sizeof(s->buf), 0);
1147     if (size < 0)
1148         return;
1149     if (size == 0) {
1150         /* end of connection */
1151         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1152         return;
1153     }
1154     qemu_send_packet(s->vc, s->buf, size);
1155 }
1156
1157 static int net_socket_mcast_create(struct sockaddr_in *mcastaddr)
1158 {
1159     struct ip_mreq imr;
1160     int fd;
1161     int val, ret;
1162     if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
1163         fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n",
1164                 inet_ntoa(mcastaddr->sin_addr),
1165                 (int)ntohl(mcastaddr->sin_addr.s_addr));
1166         return -1;
1167
1168     }
1169     fd = socket(PF_INET, SOCK_DGRAM, 0);
1170     if (fd < 0) {
1171         perror("socket(PF_INET, SOCK_DGRAM)");
1172         return -1;
1173     }
1174
1175     val = 1;
1176     ret=setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
1177                    (const char *)&val, sizeof(val));
1178     if (ret < 0) {
1179         perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
1180         goto fail;
1181     }
1182
1183     ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
1184     if (ret < 0) {
1185         perror("bind");
1186         goto fail;
1187     }
1188
1189     /* Add host to multicast group */
1190     imr.imr_multiaddr = mcastaddr->sin_addr;
1191     imr.imr_interface.s_addr = htonl(INADDR_ANY);
1192
1193     ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1194                      (const char *)&imr, sizeof(struct ip_mreq));
1195     if (ret < 0) {
1196         perror("setsockopt(IP_ADD_MEMBERSHIP)");
1197         goto fail;
1198     }
1199
1200     /* Force mcast msgs to loopback (eg. several QEMUs in same host */
1201     val = 1;
1202     ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1203                    (const char *)&val, sizeof(val));
1204     if (ret < 0) {
1205         perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
1206         goto fail;
1207     }
1208
1209     socket_set_nonblock(fd);
1210     return fd;
1211 fail:
1212     if (fd >= 0)
1213         closesocket(fd);
1214     return -1;
1215 }
1216
1217 static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
1218                                                 const char *model,
1219                                                 const char *name,
1220                                                 int fd, int is_connected)
1221 {
1222     struct sockaddr_in saddr;
1223     int newfd;
1224     socklen_t saddr_len;
1225     NetSocketState *s;
1226
1227     /* fd passed: multicast: "learn" dgram_dst address from bound address and save it
1228      * Because this may be "shared" socket from a "master" process, datagrams would be recv()
1229      * by ONLY ONE process: we must "clone" this dgram socket --jjo
1230      */
1231
1232     if (is_connected) {
1233         if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
1234             /* must be bound */
1235             if (saddr.sin_addr.s_addr==0) {
1236                 fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, cannot setup multicast dst addr\n",
1237                         fd);
1238                 return NULL;
1239             }
1240             /* clone dgram socket */
1241             newfd = net_socket_mcast_create(&saddr);
1242             if (newfd < 0) {
1243                 /* error already reported by net_socket_mcast_create() */
1244                 close(fd);
1245                 return NULL;
1246             }
1247             /* clone newfd to fd, close newfd */
1248             dup2(newfd, fd);
1249             close(newfd);
1250
1251         } else {
1252             fprintf(stderr, "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
1253                     fd, strerror(errno));
1254             return NULL;
1255         }
1256     }
1257
1258     s = qemu_mallocz(sizeof(NetSocketState));
1259     if (!s)
1260         return NULL;
1261     s->fd = fd;
1262
1263     s->vc = qemu_new_vlan_client(vlan, model, name, net_socket_receive_dgram, NULL, s);
1264     qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s);
1265
1266     /* mcast: save bound address as dst */
1267     if (is_connected) s->dgram_dst=saddr;
1268
1269     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1270             "socket: fd=%d (%s mcast=%s:%d)",
1271             fd, is_connected? "cloned" : "",
1272             inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1273     return s;
1274 }
1275
1276 static void net_socket_connect(void *opaque)
1277 {
1278     NetSocketState *s = opaque;
1279     qemu_set_fd_handler(s->fd, net_socket_send, NULL, s);
1280 }
1281
1282 static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
1283                                                  const char *model,
1284                                                  const char *name,
1285                                                  int fd, int is_connected)
1286 {
1287     NetSocketState *s;
1288     s = qemu_mallocz(sizeof(NetSocketState));
1289     if (!s)
1290         return NULL;
1291     s->fd = fd;
1292     s->vc = qemu_new_vlan_client(vlan, model, name,
1293                                  net_socket_receive, NULL, s);
1294     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1295              "socket: fd=%d", fd);
1296     if (is_connected) {
1297         net_socket_connect(s);
1298     } else {
1299         qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
1300     }
1301     return s;
1302 }
1303
1304 static NetSocketState *net_socket_fd_init(VLANState *vlan,
1305                                           const char *model, const char *name,
1306                                           int fd, int is_connected)
1307 {
1308     int so_type=-1, optlen=sizeof(so_type);
1309
1310     if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type,
1311         (socklen_t *)&optlen)< 0) {
1312         fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n", fd);
1313         return NULL;
1314     }
1315     switch(so_type) {
1316     case SOCK_DGRAM:
1317         return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected);
1318     case SOCK_STREAM:
1319         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1320     default:
1321         /* who knows ... this could be a eg. a pty, do warn and continue as stream */
1322         fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
1323         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1324     }
1325     return NULL;
1326 }
1327
1328 static void net_socket_accept(void *opaque)
1329 {
1330     NetSocketListenState *s = opaque;
1331     NetSocketState *s1;
1332     struct sockaddr_in saddr;
1333     socklen_t len;
1334     int fd;
1335
1336     for(;;) {
1337         len = sizeof(saddr);
1338         fd = accept(s->fd, (struct sockaddr *)&saddr, &len);
1339         if (fd < 0 && errno != EINTR) {
1340             return;
1341         } else if (fd >= 0) {
1342             break;
1343         }
1344     }
1345     s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1);
1346     if (!s1) {
1347         closesocket(fd);
1348     } else {
1349         snprintf(s1->vc->info_str, sizeof(s1->vc->info_str),
1350                  "socket: connection from %s:%d",
1351                  inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1352     }
1353 }
1354
1355 static int net_socket_listen_init(VLANState *vlan,
1356                                   const char *model,
1357                                   const char *name,
1358                                   const char *host_str)
1359 {
1360     NetSocketListenState *s;
1361     int fd, val, ret;
1362     struct sockaddr_in saddr;
1363
1364     if (parse_host_port(&saddr, host_str) < 0)
1365         return -1;
1366
1367     s = qemu_mallocz(sizeof(NetSocketListenState));
1368     if (!s)
1369         return -1;
1370
1371     fd = socket(PF_INET, SOCK_STREAM, 0);
1372     if (fd < 0) {
1373         perror("socket");
1374         return -1;
1375     }
1376     socket_set_nonblock(fd);
1377
1378     /* allow fast reuse */
1379     val = 1;
1380     setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));
1381
1382     ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
1383     if (ret < 0) {
1384         perror("bind");
1385         return -1;
1386     }
1387     ret = listen(fd, 0);
1388     if (ret < 0) {
1389         perror("listen");
1390         return -1;
1391     }
1392     s->vlan = vlan;
1393     s->model = strdup(model);
1394     s->name = strdup(name);
1395     s->fd = fd;
1396     qemu_set_fd_handler(fd, net_socket_accept, NULL, s);
1397     return 0;
1398 }
1399
1400 static int net_socket_connect_init(VLANState *vlan,
1401                                    const char *model,
1402                                    const char *name,
1403                                    const char *host_str)
1404 {
1405     NetSocketState *s;
1406     int fd, connected, ret, err;
1407     struct sockaddr_in saddr;
1408
1409     if (parse_host_port(&saddr, host_str) < 0)
1410         return -1;
1411
1412     fd = socket(PF_INET, SOCK_STREAM, 0);
1413     if (fd < 0) {
1414         perror("socket");
1415         return -1;
1416     }
1417     socket_set_nonblock(fd);
1418
1419     connected = 0;
1420     for(;;) {
1421         ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
1422         if (ret < 0) {
1423             err = socket_error();
1424             if (err == EINTR || err == EWOULDBLOCK) {
1425             } else if (err == EINPROGRESS) {
1426                 break;
1427 #ifdef _WIN32
1428             } else if (err == WSAEALREADY) {
1429                 break;
1430 #endif
1431             } else {
1432                 perror("connect");
1433                 closesocket(fd);
1434                 return -1;
1435             }
1436         } else {
1437             connected = 1;
1438             break;
1439         }
1440     }
1441     s = net_socket_fd_init(vlan, model, name, fd, connected);
1442     if (!s)
1443         return -1;
1444     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1445              "socket: connect to %s:%d",
1446              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1447     return 0;
1448 }
1449
1450 static int net_socket_mcast_init(VLANState *vlan,
1451                                  const char *model,
1452                                  const char *name,
1453                                  const char *host_str)
1454 {
1455     NetSocketState *s;
1456     int fd;
1457     struct sockaddr_in saddr;
1458
1459     if (parse_host_port(&saddr, host_str) < 0)
1460         return -1;
1461
1462
1463     fd = net_socket_mcast_create(&saddr);
1464     if (fd < 0)
1465         return -1;
1466
1467     s = net_socket_fd_init(vlan, model, name, fd, 0);
1468     if (!s)
1469         return -1;
1470
1471     s->dgram_dst = saddr;
1472
1473     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1474              "socket: mcast=%s:%d",
1475              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1476     return 0;
1477
1478 }
1479
1480 /* find or alloc a new VLAN */
1481 VLANState *qemu_find_vlan(int id)
1482 {
1483     VLANState **pvlan, *vlan;
1484     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1485         if (vlan->id == id)
1486             return vlan;
1487     }
1488     vlan = qemu_mallocz(sizeof(VLANState));
1489     if (!vlan)
1490         return NULL;
1491     vlan->id = id;
1492     vlan->next = NULL;
1493     pvlan = &first_vlan;
1494     while (*pvlan != NULL)
1495         pvlan = &(*pvlan)->next;
1496     *pvlan = vlan;
1497     return vlan;
1498 }
1499
1500 int net_client_init(const char *device, const char *p)
1501 {
1502     char buf[1024];
1503     int vlan_id, ret;
1504     VLANState *vlan;
1505     char *name = NULL;
1506
1507     vlan_id = 0;
1508     if (get_param_value(buf, sizeof(buf), "vlan", p)) {
1509         vlan_id = strtol(buf, NULL, 0);
1510     }
1511     vlan = qemu_find_vlan(vlan_id);
1512     if (!vlan) {
1513         fprintf(stderr, "Could not create vlan %d\n", vlan_id);
1514         return -1;
1515     }
1516     if (get_param_value(buf, sizeof(buf), "name", p)) {
1517         name = strdup(buf);
1518     }
1519     if (!strcmp(device, "nic")) {
1520         NICInfo *nd;
1521         uint8_t *macaddr;
1522
1523         if (nb_nics >= MAX_NICS) {
1524             fprintf(stderr, "Too Many NICs\n");
1525             return -1;
1526         }
1527         nd = &nd_table[nb_nics];
1528         macaddr = nd->macaddr;
1529         macaddr[0] = 0x52;
1530         macaddr[1] = 0x54;
1531         macaddr[2] = 0x00;
1532         macaddr[3] = 0x12;
1533         macaddr[4] = 0x34;
1534         macaddr[5] = 0x56 + nb_nics;
1535
1536         if (get_param_value(buf, sizeof(buf), "macaddr", p)) {
1537             if (parse_macaddr(macaddr, buf) < 0) {
1538                 fprintf(stderr, "invalid syntax for ethernet address\n");
1539                 return -1;
1540             }
1541         }
1542         if (get_param_value(buf, sizeof(buf), "model", p)) {
1543             nd->model = strdup(buf);
1544         }
1545         nd->vlan = vlan;
1546         nd->name = name;
1547         name = NULL;
1548         nb_nics++;
1549         vlan->nb_guest_devs++;
1550         ret = 0;
1551     } else
1552     if (!strcmp(device, "none")) {
1553         /* does nothing. It is needed to signal that no network cards
1554            are wanted */
1555         ret = 0;
1556     } else
1557 #ifdef CONFIG_SLIRP
1558     if (!strcmp(device, "user")) {
1559         if (get_param_value(buf, sizeof(buf), "hostname", p)) {
1560             pstrcpy(slirp_hostname, sizeof(slirp_hostname), buf);
1561         }
1562         if (get_param_value(buf, sizeof(buf), "restrict", p)) {
1563             slirp_restrict = (buf[0] == 'y') ? 1 : 0;
1564         }
1565         if (get_param_value(buf, sizeof(buf), "ip", p)) {
1566             slirp_ip = strdup(buf);
1567         }
1568         vlan->nb_host_devs++;
1569         ret = net_slirp_init(vlan, device, name);
1570     } else
1571 #endif
1572 #ifdef _WIN32
1573     if (!strcmp(device, "tap")) {
1574         char ifname[64];
1575         if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
1576             fprintf(stderr, "tap: no interface name\n");
1577             return -1;
1578         }
1579         vlan->nb_host_devs++;
1580         ret = tap_win32_init(vlan, device, name, ifname);
1581     } else
1582 #elif defined (_AIX)
1583 #else
1584     if (!strcmp(device, "tap")) {
1585         char ifname[64];
1586         char setup_script[1024], down_script[1024];
1587         int fd;
1588         vlan->nb_host_devs++;
1589         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
1590             fd = strtol(buf, NULL, 0);
1591             fcntl(fd, F_SETFL, O_NONBLOCK);
1592             ret = -1;
1593             if (net_tap_fd_init(vlan, device, name, fd))
1594                 ret = 0;
1595         } else {
1596             if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
1597                 ifname[0] = '\0';
1598             }
1599             if (get_param_value(setup_script, sizeof(setup_script), "script", p) == 0) {
1600                 pstrcpy(setup_script, sizeof(setup_script), DEFAULT_NETWORK_SCRIPT);
1601             }
1602             if (get_param_value(down_script, sizeof(down_script), "downscript", p) == 0) {
1603                 pstrcpy(down_script, sizeof(down_script), DEFAULT_NETWORK_DOWN_SCRIPT);
1604             }
1605             ret = net_tap_init(vlan, device, name, ifname, setup_script, down_script);
1606         }
1607     } else
1608 #endif
1609     if (!strcmp(device, "socket")) {
1610         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
1611             int fd;
1612             fd = strtol(buf, NULL, 0);
1613             ret = -1;
1614             if (net_socket_fd_init(vlan, device, name, fd, 1))
1615                 ret = 0;
1616         } else if (get_param_value(buf, sizeof(buf), "listen", p) > 0) {
1617             ret = net_socket_listen_init(vlan, device, name, buf);
1618         } else if (get_param_value(buf, sizeof(buf), "connect", p) > 0) {
1619             ret = net_socket_connect_init(vlan, device, name, buf);
1620         } else if (get_param_value(buf, sizeof(buf), "mcast", p) > 0) {
1621             ret = net_socket_mcast_init(vlan, device, name, buf);
1622         } else {
1623             fprintf(stderr, "Unknown socket options: %s\n", p);
1624             return -1;
1625         }
1626         vlan->nb_host_devs++;
1627     } else
1628 #ifdef CONFIG_VDE
1629     if (!strcmp(device, "vde")) {
1630         char vde_sock[1024], vde_group[512];
1631         int vde_port, vde_mode;
1632         vlan->nb_host_devs++;
1633         if (get_param_value(vde_sock, sizeof(vde_sock), "sock", p) <= 0) {
1634             vde_sock[0] = '\0';
1635         }
1636         if (get_param_value(buf, sizeof(buf), "port", p) > 0) {
1637             vde_port = strtol(buf, NULL, 10);
1638         } else {
1639             vde_port = 0;
1640         }
1641         if (get_param_value(vde_group, sizeof(vde_group), "group", p) <= 0) {
1642             vde_group[0] = '\0';
1643         }
1644         if (get_param_value(buf, sizeof(buf), "mode", p) > 0) {
1645             vde_mode = strtol(buf, NULL, 8);
1646         } else {
1647             vde_mode = 0700;
1648         }
1649         ret = net_vde_init(vlan, device, name, vde_sock, vde_port, vde_group, vde_mode);
1650     } else
1651 #endif
1652     {
1653         fprintf(stderr, "Unknown network device: %s\n", device);
1654         if (name)
1655             free(name);
1656         return -1;
1657     }
1658     if (ret < 0) {
1659         fprintf(stderr, "Could not initialize device '%s'\n", device);
1660     }
1661     if (name)
1662         free(name);
1663     return ret;
1664 }
1665
1666 int net_client_parse(const char *str)
1667 {
1668     const char *p;
1669     char *q;
1670     char device[64];
1671
1672     p = str;
1673     q = device;
1674     while (*p != '\0' && *p != ',') {
1675         if ((q - device) < sizeof(device) - 1)
1676             *q++ = *p;
1677         p++;
1678     }
1679     *q = '\0';
1680     if (*p == ',')
1681         p++;
1682
1683     return net_client_init(device, p);
1684 }
1685
1686 void do_info_network(void)
1687 {
1688     VLANState *vlan;
1689     VLANClientState *vc;
1690
1691     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1692         term_printf("VLAN %d devices:\n", vlan->id);
1693         for(vc = vlan->first_client; vc != NULL; vc = vc->next)
1694             term_printf("  %s: %s\n", vc->name, vc->info_str);
1695     }
1696 }
1697
1698 int do_set_link(const char *name, const char *up_or_down)
1699 {
1700     VLANState *vlan;
1701     VLANClientState *vc = NULL;
1702
1703     for (vlan = first_vlan; vlan != NULL; vlan = vlan->next)
1704         for (vc = vlan->first_client; vc != NULL; vc = vc->next)
1705             if (strcmp(vc->name, name) == 0)
1706                 goto done;
1707 done:
1708
1709     if (!vc) {
1710         term_printf("could not find network device '%s'", name);
1711         return 0;
1712     }
1713
1714     if (strcmp(up_or_down, "up") == 0)
1715         vc->link_down = 0;
1716     else if (strcmp(up_or_down, "down") == 0)
1717         vc->link_down = 1;
1718     else
1719         term_printf("invalid link status '%s'; only 'up' or 'down' valid\n",
1720                     up_or_down);
1721
1722     if (vc->link_status_changed)
1723         vc->link_status_changed(vc);
1724
1725     return 1;
1726 }
1727
1728 void net_cleanup(void)
1729 {
1730     VLANState *vlan;
1731
1732 #if !defined(_WIN32)
1733     /* close network clients */
1734     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1735         VLANClientState *vc;
1736
1737         for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
1738             if (vc->fd_read == tap_receive) {
1739                 char ifname[64];
1740                 TAPState *s = vc->opaque;
1741
1742                 if (strcmp(vc->model, "tap") == 0 &&
1743                     sscanf(vc->info_str, "ifname=%63s ", ifname) == 1 &&
1744                     s->down_script[0])
1745                     launch_script(s->down_script, ifname, s->fd);
1746             }
1747 #if defined(CONFIG_VDE)
1748             if (vc->fd_read == vde_from_qemu) {
1749                 VDEState *s = vc->opaque;
1750                 vde_close(s->vde);
1751             }
1752 #endif
1753         }
1754     }
1755 #endif
1756 }
1757
1758 void net_client_check(void)
1759 {
1760     VLANState *vlan;
1761
1762     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1763         if (vlan->nb_guest_devs == 0 && vlan->nb_host_devs == 0)
1764             continue;
1765         if (vlan->nb_guest_devs == 0)
1766             fprintf(stderr, "Warning: vlan %d with no nics\n", vlan->id);
1767         if (vlan->nb_host_devs == 0)
1768             fprintf(stderr,
1769                     "Warning: vlan %d is not connected to host network\n",
1770                     vlan->id);
1771     }
1772 }