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 "hw/hw.h"
  25 #include "hw/boards.h"
  26 #include "hw/usb.h"
  27 #include "hw/pcmcia.h"
  28 #include "hw/pc.h"
  29 #include "hw/audiodev.h"
  30 #include "hw/isa.h"
  31 #include "hw/baum.h"
  32 #include "hw/bt.h"
  33 #include "net.h"
  34 #include "console.h"
  35 #include "sysemu.h"
  36 #include "gdbstub.h"
  37 #include "qemu-timer.h"
  38 #include "qemu-char.h"
  39 #include "block.h"
  40 #include "audio/audio.h"
  41 #include "migration.h"
  42
  43 #include <unistd.h>
  44 #include <fcntl.h>
  45 #include <signal.h>
  46 #include <time.h>
  47 #include <errno.h>
  48 #include <sys/time.h>
  49 #include <zlib.h>
  50
  51 #ifndef _WIN32
  52 #include <sys/times.h>
  53 #include <sys/wait.h>
  54 #include <termios.h>
  55 #include <sys/mman.h>
  56 #include <sys/ioctl.h>
  57 #include <sys/socket.h>
  58 #include <netinet/in.h>
  59 #include <dirent.h>
  60 #include <netdb.h>
  61 #include <sys/select.h>
  62 #include <arpa/inet.h>
  63 #ifdef _BSD
  64 #include <sys/stat.h>
  65 #if !defined(__APPLE__) && !defined(__OpenBSD__)
  66 #include <libutil.h>
  67 #endif
  68 #ifdef __OpenBSD__
  69 #include <net/if.h>
  70 #endif
  71 #elif defined (__GLIBC__) && defined (__FreeBSD_kernel__)
  72 #include <freebsd/stdlib.h>
  73 #else
  74 #ifdef __linux__
  75 #include <linux/if.h>
  76 #include <linux/if_tun.h>
  77 #include <pty.h>
  78 #include <malloc.h>
  79 #include <linux/rtc.h>
  80
  81 /* For the benefit of older linux systems which don't supply it,
  82    we use a local copy of hpet.h. */
  83 /* #include <linux/hpet.h> */
  84 #include "hpet.h"
  85
  86 #include <linux/ppdev.h>
  87 #include <linux/parport.h>
  88 #endif
  89 #ifdef __sun__
  90 #include <sys/stat.h>
  91 #include <sys/ethernet.h>
  92 #include <sys/sockio.h>
  93 #include <netinet/arp.h>
  94 #include <netinet/in.h>
  95 #include <netinet/in_systm.h>
  96 #include <netinet/ip.h>
  97 #include <netinet/ip_icmp.h> // must come after ip.h
  98 #include <netinet/udp.h>
  99 #include <netinet/tcp.h>
 100 #include <net/if.h>
 101 #include <syslog.h>
 102 #include <stropts.h>
 103 #endif
 104 #endif
 105 #endif
 106
 107 #include "qemu_socket.h"
 108
 109 #if defined(CONFIG_SLIRP)
 110 #include "libslirp.h"
 111 #endif
 112
 113 #if defined(__OpenBSD__)
 114 #include <util.h>
 115 #endif
 116
 117 #if defined(CONFIG_VDE)
 118 #include <libvdeplug.h>
 119 #endif
 120
 121 #ifdef _WIN32
 122 #include <malloc.h>
 123 #include <sys/timeb.h>
 124 #include <mmsystem.h>
 125 #define getopt_long_only getopt_long
 126 #define memalign(align, size) malloc(size)
 127 #endif
 128
 129 #define DEFAULT_NETWORK_SCRIPT "/etc/qemu-ifup"
 130 #define DEFAULT_NETWORK_DOWN_SCRIPT "/etc/qemu-ifdown"
 131 #ifdef __sun__
 132 #define SMBD_COMMAND "/usr/sfw/sbin/smbd"
 133 #else
 134 #define SMBD_COMMAND "/usr/sbin/smbd"
 135 #endif
 136
 137 static VLANState *first_vlan;
 138
 139 /***********************************************************/
 140 /* network device redirectors */
 141
 142 #if defined(DEBUG_NET) || defined(DEBUG_SLIRP)
 143 static void hex_dump(FILE *f, const uint8_t *buf, int size)
 144 {
 145     int len, i, j, c;
 146
 147     for(i=0;i<size;i+=16) {
 148         len = size - i;
 149         if (len > 16)
 150             len = 16;
 151         fprintf(f, "%08x ", i);
 152         for(j=0;j<16;j++) {
 153             if (j < len)
 154                 fprintf(f, " %02x", buf[i+j]);
 155             else
 156                 fprintf(f, "   ");
 157         }
 158         fprintf(f, " ");
 159         for(j=0;j<len;j++) {
 160             c = buf[i+j];
 161             if (c < ' ' || c > '~')
 162                 c = '.';
 163             fprintf(f, "%c", c);
 164         }
 165         fprintf(f, "\n");
 166     }
 167 }
 168 #endif
 169
 170 static int parse_macaddr(uint8_t *macaddr, const char *p)
 171 {
 172     int i;
 173     char *last_char;
 174     long int offset;
 175
 176     errno = 0;
 177     offset = strtol(p, &last_char, 0);
 178     if (0 == errno && '\0' == *last_char &&
 179             offset >= 0 && offset <= 0xFFFFFF) {
 180         macaddr[3] = (offset & 0xFF0000) >> 16;
 181         macaddr[4] = (offset & 0xFF00) >> 8;
 182         macaddr[5] = offset & 0xFF;
 183         return 0;
 184     } else {
 185         for(i = 0; i < 6; i++) {
 186             macaddr[i] = strtol(p, (char **)&p, 16);
 187             if (i == 5) {
 188                 if (*p != '\0')
 189                     return -1;
 190             } else {
 191                 if (*p != ':' && *p != '-')
 192                     return -1;
 193                 p++;
 194             }
 195         }
 196         return 0;
 197     }
 198
 199     return -1;
 200 }
 201
 202 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
 203 {
 204     const char *p, *p1;
 205     int len;
 206     p = *pp;
 207     p1 = strchr(p, sep);
 208     if (!p1)
 209         return -1;
 210     len = p1 - p;
 211     p1++;
 212     if (buf_size > 0) {
 213         if (len > buf_size - 1)
 214             len = buf_size - 1;
 215         memcpy(buf, p, len);
 216         buf[len] = '\0';
 217     }
 218     *pp = p1;
 219     return 0;
 220 }
 221
 222 int parse_host_src_port(struct sockaddr_in *haddr,
 223                         struct sockaddr_in *saddr,
 224                         const char *input_str)
 225 {
 226     char *str = strdup(input_str);
 227     char *host_str = str;
 228     char *src_str;
 229     const char *src_str2;
 230     char *ptr;
 231
 232     /*
 233      * Chop off any extra arguments at the end of the string which
 234      * would start with a comma, then fill in the src port information
 235      * if it was provided else use the "any address" and "any port".
 236      */
 237     if ((ptr = strchr(str,',')))
 238         *ptr = '\0';
 239
 240     if ((src_str = strchr(input_str,'@'))) {
 241         *src_str = '\0';
 242         src_str++;
 243     }
 244
 245     if (parse_host_port(haddr, host_str) < 0)
 246         goto fail;
 247
 248     src_str2 = src_str;
 249     if (!src_str || *src_str == '\0')
 250         src_str2 = ":0";
 251
 252     if (parse_host_port(saddr, src_str2) < 0)
 253         goto fail;
 254
 255     free(str);
 256     return(0);
 257
 258 fail:
 259     free(str);
 260     return -1;
 261 }
 262
 263 int parse_host_port(struct sockaddr_in *saddr, const char *str)
 264 {
 265     char buf[512];
 266     struct hostent *he;
 267     const char *p, *r;
 268     int port;
 269
 270     p = str;
 271     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 272         return -1;
 273     saddr->sin_family = AF_INET;
 274     if (buf[0] == '\0') {
 275         saddr->sin_addr.s_addr = 0;
 276     } else {
 277         if (isdigit(buf[0])) {
 278             if (!inet_aton(buf, &saddr->sin_addr))
 279                 return -1;
 280         } else {
 281             if ((he = gethostbyname(buf)) == NULL)
 282                 return - 1;
 283             saddr->sin_addr = *(struct in_addr *)he->h_addr;
 284         }
 285     }
 286     port = strtol(p, (char **)&r, 0);
 287     if (r == p)
 288         return -1;
 289     saddr->sin_port = htons(port);
 290     return 0;
 291 }
 292
 293 #ifndef _WIN32
 294 int parse_unix_path(struct sockaddr_un *uaddr, const char *str)
 295 {
 296     const char *p;
 297     int len;
 298
 299     len = MIN(108, strlen(str));
 300     p = strchr(str, ',');
 301     if (p)
 302         len = MIN(len, p - str);
 303
 304     memset(uaddr, 0, sizeof(*uaddr));
 305
 306     uaddr->sun_family = AF_UNIX;
 307     memcpy(uaddr->sun_path, str, len);
 308
 309     return 0;
 310 }
 311 #endif
 312
 313 VLANClientState *qemu_new_vlan_client(VLANState *vlan,
 314                                       IOReadHandler *fd_read,
 315                                       IOCanRWHandler *fd_can_read,
 316                                       void *opaque)
 317 {
 318     VLANClientState *vc, **pvc;
 319     vc = qemu_mallocz(sizeof(VLANClientState));
 320     if (!vc)
 321         return NULL;
 322     vc->fd_read = fd_read;
 323     vc->fd_can_read = fd_can_read;
 324     vc->opaque = opaque;
 325     vc->vlan = vlan;
 326
 327     vc->next = NULL;
 328     pvc = &vlan->first_client;
 329     while (*pvc != NULL)
 330         pvc = &(*pvc)->next;
 331     *pvc = vc;
 332     return vc;
 333 }
 334
 335 void qemu_del_vlan_client(VLANClientState *vc)
 336 {
 337     VLANClientState **pvc = &vc->vlan->first_client;
 338
 339     while (*pvc != NULL)
 340         if (*pvc == vc) {
 341             *pvc = vc->next;
 342             free(vc);
 343             break;
 344         } else
 345             pvc = &(*pvc)->next;
 346 }
 347
 348 int qemu_can_send_packet(VLANClientState *vc1)
 349 {
 350     VLANState *vlan = vc1->vlan;
 351     VLANClientState *vc;
 352
 353     for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
 354         if (vc != vc1) {
 355             if (vc->fd_can_read && vc->fd_can_read(vc->opaque))
 356                 return 1;
 357         }
 358     }
 359     return 0;
 360 }
 361
 362 void qemu_send_packet(VLANClientState *vc1, const uint8_t *buf, int size)
 363 {
 364     VLANState *vlan = vc1->vlan;
 365     VLANClientState *vc;
 366
 367 #ifdef DEBUG_NET
 368     printf("vlan %d send:\n", vlan->id);
 369     hex_dump(stdout, buf, size);
 370 #endif
 371     for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
 372         if (vc != vc1) {
 373             vc->fd_read(vc->opaque, buf, size);
 374         }
 375     }
 376 }
 377
 378 #if defined(CONFIG_SLIRP)
 379
 380 /* slirp network adapter */
 381
 382 static int slirp_inited;
 383 static VLANClientState *slirp_vc;
 384
 385 int slirp_can_output(void)
 386 {
 387     return !slirp_vc || qemu_can_send_packet(slirp_vc);
 388 }
 389
 390 void slirp_output(const uint8_t *pkt, int pkt_len)
 391 {
 392 #ifdef DEBUG_SLIRP
 393     printf("slirp output:\n");
 394     hex_dump(stdout, pkt, pkt_len);
 395 #endif
 396     if (!slirp_vc)
 397         return;
 398     qemu_send_packet(slirp_vc, pkt, pkt_len);
 399 }
 400
 401 int slirp_is_inited(void)
 402 {
 403     return slirp_inited;
 404 }
 405
 406 static void slirp_receive(void *opaque, const uint8_t *buf, int size)
 407 {
 408 #ifdef DEBUG_SLIRP
 409     printf("slirp input:\n");
 410     hex_dump(stdout, buf, size);
 411 #endif
 412     slirp_input(buf, size);
 413 }
 414
 415 static int net_slirp_init(VLANState *vlan)
 416 {
 417     if (!slirp_inited) {
 418         slirp_inited = 1;
 419         slirp_init();
 420     }
 421     slirp_vc = qemu_new_vlan_client(vlan,
 422                                     slirp_receive, NULL, NULL);
 423     snprintf(slirp_vc->info_str, sizeof(slirp_vc->info_str), "user redirector");
 424     return 0;
 425 }
 426
 427 void net_slirp_redir(const char *redir_str)
 428 {
 429     int is_udp;
 430     char buf[256], *r;
 431     const char *p;
 432     struct in_addr guest_addr;
 433     int host_port, guest_port;
 434
 435     if (!slirp_inited) {
 436         slirp_inited = 1;
 437         slirp_init();
 438     }
 439
 440     p = redir_str;
 441     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 442         goto fail;
 443     if (!strcmp(buf, "tcp")) {
 444         is_udp = 0;
 445     } else if (!strcmp(buf, "udp")) {
 446         is_udp = 1;
 447     } else {
 448         goto fail;
 449     }
 450
 451     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 452         goto fail;
 453     host_port = strtol(buf, &r, 0);
 454     if (r == buf)
 455         goto fail;
 456
 457     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 458         goto fail;
 459     if (buf[0] == '\0') {
 460         pstrcpy(buf, sizeof(buf), "10.0.2.15");
 461     }
 462     if (!inet_aton(buf, &guest_addr))
 463         goto fail;
 464
 465     guest_port = strtol(p, &r, 0);
 466     if (r == p)
 467         goto fail;
 468
 469     if (slirp_redir(is_udp, host_port, guest_addr, guest_port) < 0) {
 470         fprintf(stderr, "qemu: could not set up redirection\n");
 471         exit(1);
 472     }
 473     return;
 474  fail:
 475     fprintf(stderr, "qemu: syntax: -redir [tcp|udp]:host-port:[guest-host]:guest-port\n");
 476     exit(1);
 477 }
 478
 479 #ifndef _WIN32
 480
 481 static char smb_dir[1024];
 482
 483 static void erase_dir(char *dir_name)
 484 {
 485     DIR *d;
 486     struct dirent *de;
 487     char filename[1024];
 488
 489     /* erase all the files in the directory */
 490     if ((d = opendir(dir_name)) != 0) {
 491         for(;;) {
 492             de = readdir(d);
 493             if (!de)
 494                 break;
 495             if (strcmp(de->d_name, ".") != 0 &&
 496                 strcmp(de->d_name, "..") != 0) {
 497                 snprintf(filename, sizeof(filename), "%s/%s",
 498                          smb_dir, de->d_name);
 499                 if (unlink(filename) != 0)  /* is it a directory? */
 500                     erase_dir(filename);
 501             }
 502         }
 503         closedir(d);
 504         rmdir(dir_name);
 505     }
 506 }
 507
 508 /* automatic user mode samba server configuration */
 509 static void smb_exit(void)
 510 {
 511     erase_dir(smb_dir);
 512 }
 513
 514 /* automatic user mode samba server configuration */
 515 void net_slirp_smb(const char *exported_dir)
 516 {
 517     char smb_conf[1024];
 518     char smb_cmdline[1024];
 519     FILE *f;
 520
 521     if (!slirp_inited) {
 522         slirp_inited = 1;
 523         slirp_init();
 524     }
 525
 526     /* XXX: better tmp dir construction */
 527     snprintf(smb_dir, sizeof(smb_dir), "/tmp/qemu-smb.%d", getpid());
 528     if (mkdir(smb_dir, 0700) < 0) {
 529         fprintf(stderr, "qemu: could not create samba server dir '%s'\n", smb_dir);
 530         exit(1);
 531     }
 532     snprintf(smb_conf, sizeof(smb_conf), "%s/%s", smb_dir, "smb.conf");
 533
 534     f = fopen(smb_conf, "w");
 535     if (!f) {
 536         fprintf(stderr, "qemu: could not create samba server configuration file '%s'\n", smb_conf);
 537         exit(1);
 538     }
 539     fprintf(f,
 540             "[global]\n"
 541             "private dir=%s\n"
 542             "smb ports=0\n"
 543             "socket address=127.0.0.1\n"
 544             "pid directory=%s\n"
 545             "lock directory=%s\n"
 546             "log file=%s/log.smbd\n"
 547             "smb passwd file=%s/smbpasswd\n"
 548             "security = share\n"
 549             "[qemu]\n"
 550             "path=%s\n"
 551             "read only=no\n"
 552             "guest ok=yes\n",
 553             smb_dir,
 554             smb_dir,
 555             smb_dir,
 556             smb_dir,
 557             smb_dir,
 558             exported_dir
 559             );
 560     fclose(f);
 561     atexit(smb_exit);
 562
 563     snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -s %s",
 564              SMBD_COMMAND, smb_conf);
 565
 566     slirp_add_exec(0, smb_cmdline, 4, 139);
 567 }
 568
 569 #endif /* !defined(_WIN32) */
 570 void do_info_slirp(void)
 571 {
 572     slirp_stats();
 573 }
 574
 575 #endif /* CONFIG_SLIRP */
 576
 577 #if !defined(_WIN32)
 578
 579 typedef struct TAPState {
 580     VLANClientState *vc;
 581     int fd;
 582     char down_script[1024];
 583 } TAPState;
 584
 585 static void tap_receive(void *opaque, const uint8_t *buf, int size)
 586 {
 587     TAPState *s = opaque;
 588     int ret;
 589     for(;;) {
 590         ret = write(s->fd, buf, size);
 591         if (ret < 0 && (errno == EINTR || errno == EAGAIN)) {
 592         } else {
 593             break;
 594         }
 595     }
 596 }
 597
 598 static void tap_send(void *opaque)
 599 {
 600     TAPState *s = opaque;
 601     uint8_t buf[4096];
 602     int size;
 603
 604 #ifdef __sun__
 605     struct strbuf sbuf;
 606     int f = 0;
 607     sbuf.maxlen = sizeof(buf);
 608     sbuf.buf = buf;
 609     size = getmsg(s->fd, NULL, &sbuf, &f) >=0 ? sbuf.len : -1;
 610 #else
 611     size = read(s->fd, buf, sizeof(buf));
 612 #endif
 613     if (size > 0) {
 614         qemu_send_packet(s->vc, buf, size);
 615     }
 616 }
 617
 618 /* fd support */
 619
 620 static TAPState *net_tap_fd_init(VLANState *vlan, int fd)
 621 {
 622     TAPState *s;
 623
 624     s = qemu_mallocz(sizeof(TAPState));
 625     if (!s)
 626         return NULL;
 627     s->fd = fd;
 628     s->vc = qemu_new_vlan_client(vlan, tap_receive, NULL, s);
 629     qemu_set_fd_handler(s->fd, tap_send, NULL, s);
 630     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "tap: fd=%d", fd);
 631     return s;
 632 }
 633
 634 #if defined (_BSD) || defined (__FreeBSD_kernel__)
 635 static int tap_open(char *ifname, int ifname_size)
 636 {
 637     int fd;
 638     char *dev;
 639     struct stat s;
 640
 641     TFR(fd = open("/dev/tap", O_RDWR));
 642     if (fd < 0) {
 643         fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n");
 644         return -1;
 645     }
 646
 647     fstat(fd, &s);
 648     dev = devname(s.st_rdev, S_IFCHR);
 649     pstrcpy(ifname, ifname_size, dev);
 650
 651     fcntl(fd, F_SETFL, O_NONBLOCK);
 652     return fd;
 653 }
 654 #elif defined(__sun__)
 655 #define TUNNEWPPA       (('T'<<16) | 0x0001)
 656 /*
 657  * Allocate TAP device, returns opened fd.
 658  * Stores dev name in the first arg(must be large enough).
 659  */
 660 int tap_alloc(char *dev, size_t dev_size)
 661 {
 662     int tap_fd, if_fd, ppa = -1;
 663     static int ip_fd = 0;
 664     char *ptr;
 665
 666     static int arp_fd = 0;
 667     int ip_muxid, arp_muxid;
 668     struct strioctl  strioc_if, strioc_ppa;
 669     int link_type = I_PLINK;;
 670     struct lifreq ifr;
 671     char actual_name[32] = "";
 672
 673     memset(&ifr, 0x0, sizeof(ifr));
 674
 675     if( *dev ){
 676        ptr = dev;
 677        while( *ptr && !isdigit((int)*ptr) ) ptr++;
 678        ppa = atoi(ptr);
 679     }
 680
 681     /* Check if IP device was opened */
 682     if( ip_fd )
 683        close(ip_fd);
 684
 685     TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
 686     if (ip_fd < 0) {
 687        syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)");
 688        return -1;
 689     }
 690
 691     TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
 692     if (tap_fd < 0) {
 693        syslog(LOG_ERR, "Can't open /dev/tap");
 694        return -1;
 695     }
 696
 697     /* Assign a new PPA and get its unit number. */
 698     strioc_ppa.ic_cmd = TUNNEWPPA;
 699     strioc_ppa.ic_timout = 0;
 700     strioc_ppa.ic_len = sizeof(ppa);
 701     strioc_ppa.ic_dp = (char *)&ppa;
 702     if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
 703        syslog (LOG_ERR, "Can't assign new interface");
 704
 705     TFR(if_fd = open("/dev/tap", O_RDWR, 0));
 706     if (if_fd < 0) {
 707        syslog(LOG_ERR, "Can't open /dev/tap (2)");
 708        return -1;
 709     }
 710     if(ioctl(if_fd, I_PUSH, "ip") < 0){
 711        syslog(LOG_ERR, "Can't push IP module");
 712        return -1;
 713     }
 714
 715     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
 716         syslog(LOG_ERR, "Can't get flags\n");
 717
 718     snprintf (actual_name, 32, "tap%d", ppa);
 719     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
 720
 721     ifr.lifr_ppa = ppa;
 722     /* Assign ppa according to the unit number returned by tun device */
 723
 724     if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
 725         syslog (LOG_ERR, "Can't set PPA %d", ppa);
 726     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
 727         syslog (LOG_ERR, "Can't get flags\n");
 728     /* Push arp module to if_fd */
 729     if (ioctl (if_fd, I_PUSH, "arp") < 0)
 730         syslog (LOG_ERR, "Can't push ARP module (2)");
 731
 732     /* Push arp module to ip_fd */
 733     if (ioctl (ip_fd, I_POP, NULL) < 0)
 734         syslog (LOG_ERR, "I_POP failed\n");
 735     if (ioctl (ip_fd, I_PUSH, "arp") < 0)
 736         syslog (LOG_ERR, "Can't push ARP module (3)\n");
 737     /* Open arp_fd */
 738     TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
 739     if (arp_fd < 0)
 740        syslog (LOG_ERR, "Can't open %s\n", "/dev/tap");
 741
 742     /* Set ifname to arp */
 743     strioc_if.ic_cmd = SIOCSLIFNAME;
 744     strioc_if.ic_timout = 0;
 745     strioc_if.ic_len = sizeof(ifr);
 746     strioc_if.ic_dp = (char *)&ifr;
 747     if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
 748         syslog (LOG_ERR, "Can't set ifname to arp\n");
 749     }
 750
 751     if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
 752        syslog(LOG_ERR, "Can't link TAP device to IP");
 753        return -1;
 754     }
 755
 756     if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
 757         syslog (LOG_ERR, "Can't link TAP device to ARP");
 758
 759     close (if_fd);
 760
 761     memset(&ifr, 0x0, sizeof(ifr));
 762     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
 763     ifr.lifr_ip_muxid  = ip_muxid;
 764     ifr.lifr_arp_muxid = arp_muxid;
 765
 766     if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
 767     {
 768       ioctl (ip_fd, I_PUNLINK , arp_muxid);
 769       ioctl (ip_fd, I_PUNLINK, ip_muxid);
 770       syslog (LOG_ERR, "Can't set multiplexor id");
 771     }
 772
 773     snprintf(dev, dev_size, "tap%d", ppa);
 774     return tap_fd;
 775 }
 776
 777 static int tap_open(char *ifname, int ifname_size)
 778 {
 779     char  dev[10]="";
 780     int fd;
 781     if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){
 782        fprintf(stderr, "Cannot allocate TAP device\n");
 783        return -1;
 784     }
 785     pstrcpy(ifname, ifname_size, dev);
 786     fcntl(fd, F_SETFL, O_NONBLOCK);
 787     return fd;
 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 #else
1451     if (!strcmp(device, "tap")) {
1452         char ifname[64];
1453         char setup_script[1024], down_script[1024];
1454         int fd;
1455         vlan->nb_host_devs++;
1456         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
1457             fd = strtol(buf, NULL, 0);
1458             fcntl(fd, F_SETFL, O_NONBLOCK);
1459             ret = -1;
1460             if (net_tap_fd_init(vlan, fd))
1461                 ret = 0;
1462         } else {
1463             if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
1464                 ifname[0] = '\0';
1465             }
1466             if (get_param_value(setup_script, sizeof(setup_script), "script", p) == 0) {
1467                 pstrcpy(setup_script, sizeof(setup_script), DEFAULT_NETWORK_SCRIPT);
1468             }
1469             if (get_param_value(down_script, sizeof(down_script), "downscript", p) == 0) {
1470                 pstrcpy(down_script, sizeof(down_script), DEFAULT_NETWORK_DOWN_SCRIPT);
1471             }
1472             ret = net_tap_init(vlan, ifname, setup_script, down_script);
1473         }
1474     } else
1475 #endif
1476     if (!strcmp(device, "socket")) {
1477         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
1478             int fd;
1479             fd = strtol(buf, NULL, 0);
1480             ret = -1;
1481             if (net_socket_fd_init(vlan, fd, 1))
1482                 ret = 0;
1483         } else if (get_param_value(buf, sizeof(buf), "listen", p) > 0) {
1484             ret = net_socket_listen_init(vlan, buf);
1485         } else if (get_param_value(buf, sizeof(buf), "connect", p) > 0) {
1486             ret = net_socket_connect_init(vlan, buf);
1487         } else if (get_param_value(buf, sizeof(buf), "mcast", p) > 0) {
1488             ret = net_socket_mcast_init(vlan, buf);
1489         } else {
1490             fprintf(stderr, "Unknown socket options: %s\n", p);
1491             return -1;
1492         }
1493         vlan->nb_host_devs++;
1494     } else
1495 #ifdef CONFIG_VDE
1496     if (!strcmp(device, "vde")) {
1497         char vde_sock[1024], vde_group[512];
1498         int vde_port, vde_mode;
1499         vlan->nb_host_devs++;
1500         if (get_param_value(vde_sock, sizeof(vde_sock), "sock", p) <= 0) {
1501             vde_sock[0] = '\0';
1502         }
1503         if (get_param_value(buf, sizeof(buf), "port", p) > 0) {
1504             vde_port = strtol(buf, NULL, 10);
1505         } else {
1506             vde_port = 0;
1507         }
1508         if (get_param_value(vde_group, sizeof(vde_group), "group", p) <= 0) {
1509             vde_group[0] = '\0';
1510         }
1511         if (get_param_value(buf, sizeof(buf), "mode", p) > 0) {
1512             vde_mode = strtol(buf, NULL, 8);
1513         } else {
1514             vde_mode = 0700;
1515         }
1516         ret = net_vde_init(vlan, vde_sock, vde_port, vde_group, vde_mode);
1517     } else
1518 #endif
1519     {
1520         fprintf(stderr, "Unknown network device: %s\n", device);
1521         return -1;
1522     }
1523     if (ret < 0) {
1524         fprintf(stderr, "Could not initialize device '%s'\n", device);
1525     }
1526
1527     return ret;
1528 }
1529
1530 int net_client_parse(const char *str)
1531 {
1532     const char *p;
1533     char *q;
1534     char device[64];
1535
1536     p = str;
1537     q = device;
1538     while (*p != '\0' && *p != ',') {
1539         if ((q - device) < sizeof(device) - 1)
1540             *q++ = *p;
1541         p++;
1542     }
1543     *q = '\0';
1544     if (*p == ',')
1545         p++;
1546
1547     return net_client_init(device, p);
1548 }
1549
1550 void do_info_network(void)
1551 {
1552     VLANState *vlan;
1553     VLANClientState *vc;
1554
1555     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1556         term_printf("VLAN %d devices:\n", vlan->id);
1557         for(vc = vlan->first_client; vc != NULL; vc = vc->next)
1558             term_printf("  %s\n", vc->info_str);
1559     }
1560 }
1561
1562 void net_cleanup(void)
1563 {
1564     VLANState *vlan;
1565
1566 #if !defined(_WIN32)
1567     /* close network clients */
1568     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1569         VLANClientState *vc;
1570
1571         for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
1572             if (vc->fd_read == tap_receive) {
1573                 char ifname[64];
1574                 TAPState *s = vc->opaque;
1575
1576                 if (sscanf(vc->info_str, "tap: ifname=%63s ", ifname) == 1 &&
1577                     s->down_script[0])
1578                     launch_script(s->down_script, ifname, s->fd);
1579             }
1580 #if defined(CONFIG_VDE)
1581             if (vc->fd_read == vde_from_qemu) {
1582                 VDEState *s = vc->opaque;
1583                 vde_close(s->vde);
1584             }
1585 #endif
1586         }
1587     }
1588 #endif
1589 }
1590
1591 void net_client_check(void)
1592 {
1593     VLANState *vlan;
1594
1595     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1596         if (vlan->nb_guest_devs == 0 && vlan->nb_host_devs == 0)
1597             continue;
1598         if (vlan->nb_guest_devs == 0)
1599             fprintf(stderr, "Warning: vlan %d with no nics\n", vlan->id);
1600         if (vlan->nb_host_devs == 0)
1601             fprintf(stderr,
1602                     "Warning: vlan %d is not connected to host network\n",
1603                     vlan->id);
1604     }
1605 }