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