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