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