net.c

   1 /*
   2  * QEMU System Emulator
   3  *
   4  * Copyright (c) 2003-2008 Fabrice Bellard
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24 #include "qemu-common.h"
  25 #include "net.h"
  26 #include "console.h"
  27 #include "sysemu.h"
  28 #include "qemu-timer.h"
  29 #include "qemu-char.h"
  30 #include "audio/audio.h"
  31
  32 #include <unistd.h>
  33 #include <fcntl.h>
  34 #include <signal.h>
  35 #include <time.h>
  36 #include <errno.h>
  37 #include <sys/time.h>
  38 #include <zlib.h>
  39
  40 #ifndef _WIN32
  41 #include <sys/times.h>
  42 #include <sys/wait.h>
  43 #include <termios.h>
  44 #include <sys/mman.h>
  45 #include <sys/ioctl.h>
  46 #include <sys/resource.h>
  47 #include <sys/socket.h>
  48 #include <netinet/in.h>
  49 #include <net/if.h>
  50 #ifdef __NetBSD__
  51 #include <net/if_tap.h>
  52 #endif
  53 #ifdef __linux__
  54 #include <linux/if_tun.h>
  55 #endif
  56 #include <arpa/inet.h>
  57 #include <dirent.h>
  58 #include <netdb.h>
  59 #include <sys/select.h>
  60 #ifdef _BSD
  61 #include <sys/stat.h>
  62 #ifdef __FreeBSD__
  63 #include <libutil.h>
  64 #else
  65 #include <util.h>
  66 #endif
  67 #elif defined (__GLIBC__) && defined (__FreeBSD_kernel__)
  68 #include <freebsd/stdlib.h>
  69 #else
  70 #ifdef __linux__
  71 #include <pty.h>
  72 #include <malloc.h>
  73 #include <linux/rtc.h>
  74
  75 /* For the benefit of older linux systems which don't supply it,
  76    we use a local copy of hpet.h. */
  77 /* #include <linux/hpet.h> */
  78 #include "hpet.h"
  79
  80 #include <linux/ppdev.h>
  81 #include <linux/parport.h>
  82 #endif
  83 #ifdef __sun__
  84 #include <sys/stat.h>
  85 #include <sys/ethernet.h>
  86 #include <sys/sockio.h>
  87 #include <netinet/arp.h>
  88 #include <netinet/in.h>
  89 #include <netinet/in_systm.h>
  90 #include <netinet/ip.h>
  91 #include <netinet/ip_icmp.h> // must come after ip.h
  92 #include <netinet/udp.h>
  93 #include <netinet/tcp.h>
  94 #include <net/if.h>
  95 #include <syslog.h>
  96 #include <stropts.h>
  97 #endif
  98 #endif
  99 #endif
 100
 101 #include "qemu_socket.h"
 102
 103 #if defined(CONFIG_SLIRP)
 104 #include "libslirp.h"
 105 #endif
 106
 107 #if defined(__OpenBSD__)
 108 #include <util.h>
 109 #endif
 110
 111 #if defined(CONFIG_VDE)
 112 #include <libvdeplug.h>
 113 #endif
 114
 115 #ifdef _WIN32
 116 #include <malloc.h>
 117 #include <sys/timeb.h>
 118 #include <mmsystem.h>
 119 #define getopt_long_only getopt_long
 120 #define memalign(align, size) malloc(size)
 121 #endif
 122
 123 static VLANState *first_vlan;
 124
 125 /***********************************************************/
 126 /* network device redirectors */
 127
 128 #if defined(DEBUG_NET) || defined(DEBUG_SLIRP)
 129 static void hex_dump(FILE *f, const uint8_t *buf, int size)
 130 {
 131     int len, i, j, c;
 132
 133     for(i=0;i<size;i+=16) {
 134         len = size - i;
 135         if (len > 16)
 136             len = 16;
 137         fprintf(f, "%08x ", i);
 138         for(j=0;j<16;j++) {
 139             if (j < len)
 140                 fprintf(f, " %02x", buf[i+j]);
 141             else
 142                 fprintf(f, "   ");
 143         }
 144         fprintf(f, " ");
 145         for(j=0;j<len;j++) {
 146             c = buf[i+j];
 147             if (c < ' ' || c > '~')
 148                 c = '.';
 149             fprintf(f, "%c", c);
 150         }
 151         fprintf(f, "\n");
 152     }
 153 }
 154 #endif
 155
 156 static int parse_macaddr(uint8_t *macaddr, const char *p)
 157 {
 158     int i;
 159     char *last_char;
 160     long int offset;
 161
 162     errno = 0;
 163     offset = strtol(p, &last_char, 0);
 164     if (0 == errno && '\0' == *last_char &&
 165             offset >= 0 && offset <= 0xFFFFFF) {
 166         macaddr[3] = (offset & 0xFF0000) >> 16;
 167         macaddr[4] = (offset & 0xFF00) >> 8;
 168         macaddr[5] = offset & 0xFF;
 169         return 0;
 170     } else {
 171         for(i = 0; i < 6; i++) {
 172             macaddr[i] = strtol(p, (char **)&p, 16);
 173             if (i == 5) {
 174                 if (*p != '\0')
 175                     return -1;
 176             } else {
 177                 if (*p != ':' && *p != '-')
 178                     return -1;
 179                 p++;
 180             }
 181         }
 182         return 0;
 183     }
 184
 185     return -1;
 186 }
 187
 188 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
 189 {
 190     const char *p, *p1;
 191     int len;
 192     p = *pp;
 193     p1 = strchr(p, sep);
 194     if (!p1)
 195         return -1;
 196     len = p1 - p;
 197     p1++;
 198     if (buf_size > 0) {
 199         if (len > buf_size - 1)
 200             len = buf_size - 1;
 201         memcpy(buf, p, len);
 202         buf[len] = '\0';
 203     }
 204     *pp = p1;
 205     return 0;
 206 }
 207
 208 int parse_host_src_port(struct sockaddr_in *haddr,
 209                         struct sockaddr_in *saddr,
 210                         const char *input_str)
 211 {
 212     char *str = strdup(input_str);
 213     char *host_str = str;
 214     char *src_str;
 215     const char *src_str2;
 216     char *ptr;
 217
 218     /*
 219      * Chop off any extra arguments at the end of the string which
 220      * would start with a comma, then fill in the src port information
 221      * if it was provided else use the "any address" and "any port".
 222      */
 223     if ((ptr = strchr(str,',')))
 224         *ptr = '\0';
 225
 226     if ((src_str = strchr(input_str,'@'))) {
 227         *src_str = '\0';
 228         src_str++;
 229     }
 230
 231     if (parse_host_port(haddr, host_str) < 0)
 232         goto fail;
 233
 234     src_str2 = src_str;
 235     if (!src_str || *src_str == '\0')
 236         src_str2 = ":0";
 237
 238     if (parse_host_port(saddr, src_str2) < 0)
 239         goto fail;
 240
 241     free(str);
 242     return(0);
 243
 244 fail:
 245     free(str);
 246     return -1;
 247 }
 248
 249 int parse_host_port(struct sockaddr_in *saddr, const char *str)
 250 {
 251     char buf[512];
 252     struct hostent *he;
 253     const char *p, *r;
 254     int port;
 255
 256     p = str;
 257     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 258         return -1;
 259     saddr->sin_family = AF_INET;
 260     if (buf[0] == '\0') {
 261         saddr->sin_addr.s_addr = 0;
 262     } else {
 263         if (qemu_isdigit(buf[0])) {
 264             if (!inet_aton(buf, &saddr->sin_addr))
 265                 return -1;
 266         } else {
 267             if ((he = gethostbyname(buf)) == NULL)
 268                 return - 1;
 269             saddr->sin_addr = *(struct in_addr *)he->h_addr;
 270         }
 271     }
 272     port = strtol(p, (char **)&r, 0);
 273     if (r == p)
 274         return -1;
 275     saddr->sin_port = htons(port);
 276     return 0;
 277 }
 278
 279 #if !defined(_WIN32) && 0
 280 static int parse_unix_path(struct sockaddr_un *uaddr, const char *str)
 281 {
 282     const char *p;
 283     int len;
 284
 285     len = MIN(108, strlen(str));
 286     p = strchr(str, ',');
 287     if (p)
 288         len = MIN(len, p - str);
 289
 290     memset(uaddr, 0, sizeof(*uaddr));
 291
 292     uaddr->sun_family = AF_UNIX;
 293     memcpy(uaddr->sun_path, str, len);
 294
 295     return 0;
 296 }
 297 #endif
 298
 299 void qemu_format_nic_info_str(VLANClientState *vc, uint8_t macaddr[6])
 300 {
 301     snprintf(vc->info_str, sizeof(vc->info_str),
 302              "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x",
 303              vc->model,
 304              macaddr[0], macaddr[1], macaddr[2],
 305              macaddr[3], macaddr[4], macaddr[5]);
 306 }
 307
 308 static char *assign_name(VLANClientState *vc1, const char *model)
 309 {
 310     VLANState *vlan;
 311     char buf[256];
 312     int id = 0;
 313
 314     for (vlan = first_vlan; vlan; vlan = vlan->next) {
 315         VLANClientState *vc;
 316
 317         for (vc = vlan->first_client; vc; vc = vc->next)
 318             if (vc != vc1 && strcmp(vc->model, model) == 0)
 319                 id++;
 320     }
 321
 322     snprintf(buf, sizeof(buf), "%s.%d", model, id);
 323
 324     return strdup(buf);
 325 }
 326
 327 VLANClientState *qemu_new_vlan_client(VLANState *vlan,
 328                                       const char *model,
 329                                       const char *name,
 330                                       IOReadHandler *fd_read,
 331                                       IOCanRWHandler *fd_can_read,
 332                                       void *opaque)
 333 {
 334     VLANClientState *vc, **pvc;
 335     vc = qemu_mallocz(sizeof(VLANClientState));
 336     if (!vc)
 337         return NULL;
 338     vc->model = strdup(model);
 339     if (name)
 340         vc->name = strdup(name);
 341     else
 342         vc->name = assign_name(vc, model);
 343     vc->fd_read = fd_read;
 344     vc->fd_can_read = fd_can_read;
 345     vc->opaque = opaque;
 346     vc->vlan = vlan;
 347
 348     vc->next = NULL;
 349     pvc = &vlan->first_client;
 350     while (*pvc != NULL)
 351         pvc = &(*pvc)->next;
 352     *pvc = vc;
 353     return vc;
 354 }
 355
 356 void qemu_del_vlan_client(VLANClientState *vc)
 357 {
 358     VLANClientState **pvc = &vc->vlan->first_client;
 359
 360     while (*pvc != NULL)
 361         if (*pvc == vc) {
 362             *pvc = vc->next;
 363             free(vc->name);
 364             free(vc->model);
 365             free(vc);
 366             break;
 367         } else
 368             pvc = &(*pvc)->next;
 369 }
 370
 371 int qemu_can_send_packet(VLANClientState *vc1)
 372 {
 373     VLANState *vlan = vc1->vlan;
 374     VLANClientState *vc;
 375
 376     for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
 377         if (vc != vc1) {
 378             if (vc->fd_can_read && vc->fd_can_read(vc->opaque))
 379                 return 1;
 380         }
 381     }
 382     return 0;
 383 }
 384
 385 void qemu_send_packet(VLANClientState *vc1, const uint8_t *buf, int size)
 386 {
 387     VLANState *vlan = vc1->vlan;
 388     VLANClientState *vc;
 389
 390     if (vc1->link_down)
 391         return;
 392
 393 #ifdef DEBUG_NET
 394     printf("vlan %d send:\n", vlan->id);
 395     hex_dump(stdout, buf, size);
 396 #endif
 397     for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
 398         if (vc != vc1 && !vc->link_down) {
 399             vc->fd_read(vc->opaque, buf, size);
 400         }
 401     }
 402 }
 403
 404 static ssize_t vc_sendv_compat(VLANClientState *vc, const struct iovec *iov,
 405                                int iovcnt)
 406 {
 407     uint8_t buffer[4096];
 408     size_t offset = 0;
 409     int i;
 410
 411     for (i = 0; i < iovcnt; i++) {
 412         size_t len;
 413
 414         len = MIN(sizeof(buffer) - offset, iov[i].iov_len);
 415         memcpy(buffer + offset, iov[i].iov_base, len);
 416         offset += len;
 417     }
 418
 419     vc->fd_read(vc->opaque, buffer, offset);
 420
 421     return offset;
 422 }
 423
 424 static ssize_t calc_iov_length(const struct iovec *iov, int iovcnt)
 425 {
 426     size_t offset = 0;
 427     int i;
 428
 429     for (i = 0; i < iovcnt; i++)
 430         offset += iov[i].iov_len;
 431     return offset;
 432 }
 433
 434 ssize_t qemu_sendv_packet(VLANClientState *vc1, const struct iovec *iov,
 435                           int iovcnt)
 436 {
 437     VLANState *vlan = vc1->vlan;
 438     VLANClientState *vc;
 439     ssize_t max_len = 0;
 440
 441     if (vc1->link_down)
 442         return calc_iov_length(iov, iovcnt);
 443
 444     for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
 445         ssize_t len = 0;
 446
 447         if (vc == vc1)
 448             continue;
 449
 450         if (vc->link_down)
 451             len = calc_iov_length(iov, iovcnt);
 452         if (vc->fd_readv)
 453             len = vc->fd_readv(vc->opaque, iov, iovcnt);
 454         else if (vc->fd_read)
 455             len = vc_sendv_compat(vc, iov, iovcnt);
 456
 457         max_len = MAX(max_len, len);
 458     }
 459
 460     return max_len;
 461 }
 462
 463 #if defined(CONFIG_SLIRP)
 464
 465 /* slirp network adapter */
 466
 467 static int slirp_inited;
 468 static int slirp_restrict;
 469 static char *slirp_ip;
 470 static VLANClientState *slirp_vc;
 471
 472 int slirp_can_output(void)
 473 {
 474     return !slirp_vc || qemu_can_send_packet(slirp_vc);
 475 }
 476
 477 void slirp_output(const uint8_t *pkt, int pkt_len)
 478 {
 479 #ifdef DEBUG_SLIRP
 480     printf("slirp output:\n");
 481     hex_dump(stdout, pkt, pkt_len);
 482 #endif
 483     if (!slirp_vc)
 484         return;
 485     qemu_send_packet(slirp_vc, pkt, pkt_len);
 486 }
 487
 488 int slirp_is_inited(void)
 489 {
 490     return slirp_inited;
 491 }
 492
 493 static void slirp_receive(void *opaque, const uint8_t *buf, int size)
 494 {
 495 #ifdef DEBUG_SLIRP
 496     printf("slirp input:\n");
 497     hex_dump(stdout, buf, size);
 498 #endif
 499     slirp_input(buf, size);
 500 }
 501
 502 static int net_slirp_init(VLANState *vlan, const char *model, const char *name)
 503 {
 504     if (!slirp_inited) {
 505         slirp_inited = 1;
 506         slirp_init(slirp_restrict, slirp_ip);
 507     }
 508     slirp_vc = qemu_new_vlan_client(vlan, model, name,
 509                                     slirp_receive, NULL, NULL);
 510     slirp_vc->info_str[0] = '\0';
 511     return 0;
 512 }
 513
 514 void net_slirp_redir(const char *redir_str)
 515 {
 516     int is_udp;
 517     char buf[256], *r;
 518     const char *p;
 519     struct in_addr guest_addr;
 520     int host_port, guest_port;
 521
 522     if (!slirp_inited) {
 523         slirp_inited = 1;
 524         slirp_init(slirp_restrict, slirp_ip);
 525     }
 526
 527     p = redir_str;
 528     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 529         goto fail;
 530     if (!strcmp(buf, "tcp")) {
 531         is_udp = 0;
 532     } else if (!strcmp(buf, "udp")) {
 533         is_udp = 1;
 534     } else {
 535         goto fail;
 536     }
 537
 538     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 539         goto fail;
 540     host_port = strtol(buf, &r, 0);
 541     if (r == buf)
 542         goto fail;
 543
 544     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 545         goto fail;
 546     if (buf[0] == '\0') {
 547         pstrcpy(buf, sizeof(buf), "10.0.2.15");
 548     }
 549     if (!inet_aton(buf, &guest_addr))
 550         goto fail;
 551
 552     guest_port = strtol(p, &r, 0);
 553     if (r == p)
 554         goto fail;
 555
 556     if (slirp_redir(is_udp, host_port, guest_addr, guest_port) < 0) {
 557         fprintf(stderr, "qemu: could not set up redirection\n");
 558         exit(1);
 559     }
 560     return;
 561  fail:
 562     fprintf(stderr, "qemu: syntax: -redir [tcp|udp]:host-port:[guest-host]:guest-port\n");
 563     exit(1);
 564 }
 565
 566 #ifndef _WIN32
 567
 568 static char smb_dir[1024];
 569
 570 static void erase_dir(char *dir_name)
 571 {
 572     DIR *d;
 573     struct dirent *de;
 574     char filename[1024];
 575
 576     /* erase all the files in the directory */
 577     if ((d = opendir(dir_name)) != 0) {
 578         for(;;) {
 579             de = readdir(d);
 580             if (!de)
 581                 break;
 582             if (strcmp(de->d_name, ".") != 0 &&
 583                 strcmp(de->d_name, "..") != 0) {
 584                 snprintf(filename, sizeof(filename), "%s/%s",
 585                          smb_dir, de->d_name);
 586                 if (unlink(filename) != 0)  /* is it a directory? */
 587                     erase_dir(filename);
 588             }
 589         }
 590         closedir(d);
 591         rmdir(dir_name);
 592     }
 593 }
 594
 595 /* automatic user mode samba server configuration */
 596 static void smb_exit(void)
 597 {
 598     erase_dir(smb_dir);
 599 }
 600
 601 /* automatic user mode samba server configuration */
 602 void net_slirp_smb(const char *exported_dir)
 603 {
 604     char smb_conf[1024];
 605     char smb_cmdline[1024];
 606     FILE *f;
 607
 608     if (!slirp_inited) {
 609         slirp_inited = 1;
 610         slirp_init(slirp_restrict, slirp_ip);
 611     }
 612
 613     /* XXX: better tmp dir construction */
 614     snprintf(smb_dir, sizeof(smb_dir), "/tmp/qemu-smb.%d", getpid());
 615     if (mkdir(smb_dir, 0700) < 0) {
 616         fprintf(stderr, "qemu: could not create samba server dir '%s'\n", smb_dir);
 617         exit(1);
 618     }
 619     snprintf(smb_conf, sizeof(smb_conf), "%s/%s", smb_dir, "smb.conf");
 620
 621     f = fopen(smb_conf, "w");
 622     if (!f) {
 623         fprintf(stderr, "qemu: could not create samba server configuration file '%s'\n", smb_conf);
 624         exit(1);
 625     }
 626     fprintf(f,
 627             "[global]\n"
 628             "private dir=%s\n"
 629             "smb ports=0\n"
 630             "socket address=127.0.0.1\n"
 631             "pid directory=%s\n"
 632             "lock directory=%s\n"
 633             "log file=%s/log.smbd\n"
 634             "smb passwd file=%s/smbpasswd\n"
 635             "security = share\n"
 636             "[qemu]\n"
 637             "path=%s\n"
 638             "read only=no\n"
 639             "guest ok=yes\n",
 640             smb_dir,
 641             smb_dir,
 642             smb_dir,
 643             smb_dir,
 644             smb_dir,
 645             exported_dir
 646             );
 647     fclose(f);
 648     atexit(smb_exit);
 649
 650     snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -s %s",
 651              SMBD_COMMAND, smb_conf);
 652
 653     slirp_add_exec(0, smb_cmdline, 4, 139);
 654 }
 655
 656 #endif /* !defined(_WIN32) */
 657 void do_info_slirp(void)
 658 {
 659     slirp_stats();
 660 }
 661
 662 #endif /* CONFIG_SLIRP */
 663
 664 #if !defined(_WIN32)
 665
 666 typedef struct TAPState {
 667     VLANClientState *vc;
 668     int fd;
 669     char down_script[1024];
 670     char down_script_arg[128];
 671 } TAPState;
 672
 673 #ifdef HAVE_IOVEC
 674 static ssize_t tap_receive_iov(void *opaque, const struct iovec *iov,
 675                                int iovcnt)
 676 {
 677     TAPState *s = opaque;
 678     ssize_t len;
 679
 680     do {
 681         len = writev(s->fd, iov, iovcnt);
 682     } while (len == -1 && (errno == EINTR || errno == EAGAIN));
 683
 684     return len;
 685 }
 686 #endif
 687
 688 static void tap_receive(void *opaque, const uint8_t *buf, int size)
 689 {
 690     TAPState *s = opaque;
 691     int ret;
 692     for(;;) {
 693         ret = write(s->fd, buf, size);
 694         if (ret < 0 && (errno == EINTR || errno == EAGAIN)) {
 695         } else {
 696             break;
 697         }
 698     }
 699 }
 700
 701 static void tap_send(void *opaque)
 702 {
 703     TAPState *s = opaque;
 704     uint8_t buf[4096];
 705     int size;
 706
 707 #ifdef __sun__
 708     struct strbuf sbuf;
 709     int f = 0;
 710     sbuf.maxlen = sizeof(buf);
 711     sbuf.buf = buf;
 712     size = getmsg(s->fd, NULL, &sbuf, &f) >=0 ? sbuf.len : -1;
 713 #else
 714     size = read(s->fd, buf, sizeof(buf));
 715 #endif
 716     if (size > 0) {
 717         qemu_send_packet(s->vc, buf, size);
 718     }
 719 }
 720
 721 /* fd support */
 722
 723 static TAPState *net_tap_fd_init(VLANState *vlan,
 724                                  const char *model,
 725                                  const char *name,
 726                                  int fd)
 727 {
 728     TAPState *s;
 729
 730     s = qemu_mallocz(sizeof(TAPState));
 731     if (!s)
 732         return NULL;
 733     s->fd = fd;
 734     s->vc = qemu_new_vlan_client(vlan, model, name, tap_receive, NULL, s);
 735 #ifdef HAVE_IOVEC
 736     s->vc->fd_readv = tap_receive_iov;
 737 #endif
 738     qemu_set_fd_handler(s->fd, tap_send, NULL, s);
 739     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "fd=%d", fd);
 740     return s;
 741 }
 742
 743 #if defined (_BSD) || defined (__FreeBSD_kernel__)
 744 static int tap_open(char *ifname, int ifname_size)
 745 {
 746     int fd;
 747     char *dev;
 748     struct stat s;
 749
 750     TFR(fd = open("/dev/tap", O_RDWR));
 751     if (fd < 0) {
 752         fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n");
 753         return -1;
 754     }
 755
 756     fstat(fd, &s);
 757     dev = devname(s.st_rdev, S_IFCHR);
 758     pstrcpy(ifname, ifname_size, dev);
 759
 760     fcntl(fd, F_SETFL, O_NONBLOCK);
 761     return fd;
 762 }
 763 #elif defined(__sun__)
 764 #define TUNNEWPPA       (('T'<<16) | 0x0001)
 765 /*
 766  * Allocate TAP device, returns opened fd.
 767  * Stores dev name in the first arg(must be large enough).
 768  */
 769 int tap_alloc(char *dev, size_t dev_size)
 770 {
 771     int tap_fd, if_fd, ppa = -1;
 772     static int ip_fd = 0;
 773     char *ptr;
 774
 775     static int arp_fd = 0;
 776     int ip_muxid, arp_muxid;
 777     struct strioctl  strioc_if, strioc_ppa;
 778     int link_type = I_PLINK;;
 779     struct lifreq ifr;
 780     char actual_name[32] = "";
 781
 782     memset(&ifr, 0x0, sizeof(ifr));
 783
 784     if( *dev ){
 785        ptr = dev;
 786        while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
 787        ppa = atoi(ptr);
 788     }
 789
 790     /* Check if IP device was opened */
 791     if( ip_fd )
 792        close(ip_fd);
 793
 794     TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
 795     if (ip_fd < 0) {
 796        syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)");
 797        return -1;
 798     }
 799
 800     TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
 801     if (tap_fd < 0) {
 802        syslog(LOG_ERR, "Can't open /dev/tap");
 803        return -1;
 804     }
 805
 806     /* Assign a new PPA and get its unit number. */
 807     strioc_ppa.ic_cmd = TUNNEWPPA;
 808     strioc_ppa.ic_timout = 0;
 809     strioc_ppa.ic_len = sizeof(ppa);
 810     strioc_ppa.ic_dp = (char *)&ppa;
 811     if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
 812        syslog (LOG_ERR, "Can't assign new interface");
 813
 814     TFR(if_fd = open("/dev/tap", O_RDWR, 0));
 815     if (if_fd < 0) {
 816        syslog(LOG_ERR, "Can't open /dev/tap (2)");
 817        return -1;
 818     }
 819     if(ioctl(if_fd, I_PUSH, "ip") < 0){
 820        syslog(LOG_ERR, "Can't push IP module");
 821        return -1;
 822     }
 823
 824     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
 825         syslog(LOG_ERR, "Can't get flags\n");
 826
 827     snprintf (actual_name, 32, "tap%d", ppa);
 828     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
 829
 830     ifr.lifr_ppa = ppa;
 831     /* Assign ppa according to the unit number returned by tun device */
 832
 833     if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
 834         syslog (LOG_ERR, "Can't set PPA %d", ppa);
 835     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
 836         syslog (LOG_ERR, "Can't get flags\n");
 837     /* Push arp module to if_fd */
 838     if (ioctl (if_fd, I_PUSH, "arp") < 0)
 839         syslog (LOG_ERR, "Can't push ARP module (2)");
 840
 841     /* Push arp module to ip_fd */
 842     if (ioctl (ip_fd, I_POP, NULL) < 0)
 843         syslog (LOG_ERR, "I_POP failed\n");
 844     if (ioctl (ip_fd, I_PUSH, "arp") < 0)
 845         syslog (LOG_ERR, "Can't push ARP module (3)\n");
 846     /* Open arp_fd */
 847     TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
 848     if (arp_fd < 0)
 849        syslog (LOG_ERR, "Can't open %s\n", "/dev/tap");
 850
 851     /* Set ifname to arp */
 852     strioc_if.ic_cmd = SIOCSLIFNAME;
 853     strioc_if.ic_timout = 0;
 854     strioc_if.ic_len = sizeof(ifr);
 855     strioc_if.ic_dp = (char *)&ifr;
 856     if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
 857         syslog (LOG_ERR, "Can't set ifname to arp\n");
 858     }
 859
 860     if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
 861        syslog(LOG_ERR, "Can't link TAP device to IP");
 862        return -1;
 863     }
 864
 865     if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
 866         syslog (LOG_ERR, "Can't link TAP device to ARP");
 867
 868     close (if_fd);
 869
 870     memset(&ifr, 0x0, sizeof(ifr));
 871     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
 872     ifr.lifr_ip_muxid  = ip_muxid;
 873     ifr.lifr_arp_muxid = arp_muxid;
 874
 875     if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
 876     {
 877       ioctl (ip_fd, I_PUNLINK , arp_muxid);
 878       ioctl (ip_fd, I_PUNLINK, ip_muxid);
 879       syslog (LOG_ERR, "Can't set multiplexor id");
 880     }
 881
 882     snprintf(dev, dev_size, "tap%d", ppa);
 883     return tap_fd;
 884 }
 885
 886 static int tap_open(char *ifname, int ifname_size)
 887 {
 888     char  dev[10]="";
 889     int fd;
 890     if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){
 891        fprintf(stderr, "Cannot allocate TAP device\n");
 892        return -1;
 893     }
 894     pstrcpy(ifname, ifname_size, dev);
 895     fcntl(fd, F_SETFL, O_NONBLOCK);
 896     return fd;
 897 }
 898 #elif defined (_AIX)
 899 static int tap_open(char *ifname, int ifname_size)
 900 {
 901     fprintf (stderr, "no tap on AIX\n");
 902     return -1;
 903 }
 904 #else
 905 static int tap_open(char *ifname, int ifname_size)
 906 {
 907     struct ifreq ifr;
 908     int fd, ret;
 909
 910     TFR(fd = open("/dev/net/tun", O_RDWR));
 911     if (fd < 0) {
 912         fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n");
 913         return -1;
 914     }
 915     memset(&ifr, 0, sizeof(ifr));
 916     ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
 917     if (ifname[0] != '\0')
 918         pstrcpy(ifr.ifr_name, IFNAMSIZ, ifname);
 919     else
 920         pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d");
 921     ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
 922     if (ret != 0) {
 923         fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n");
 924         close(fd);
 925         return -1;
 926     }
 927     pstrcpy(ifname, ifname_size, ifr.ifr_name);
 928     fcntl(fd, F_SETFL, O_NONBLOCK);
 929     return fd;
 930 }
 931 #endif
 932
 933 static int launch_script(const char *setup_script, const char *ifname, int fd)
 934 {
 935     int pid, status;
 936     char *args[3];
 937     char **parg;
 938
 939         /* try to launch network script */
 940         pid = fork();
 941         if (pid >= 0) {
 942             if (pid == 0) {
 943                 int open_max = sysconf (_SC_OPEN_MAX), i;
 944                 for (i = 0; i < open_max; i++)
 945                     if (i != STDIN_FILENO &&
 946                         i != STDOUT_FILENO &&
 947                         i != STDERR_FILENO &&
 948                         i != fd)
 949                         close(i);
 950
 951                 parg = args;
 952                 *parg++ = (char *)setup_script;
 953                 *parg++ = (char *)ifname;
 954                 *parg++ = NULL;
 955                 execv(setup_script, args);
 956                 _exit(1);
 957             }
 958             while (waitpid(pid, &status, 0) != pid);
 959             if (!WIFEXITED(status) ||
 960                 WEXITSTATUS(status) != 0) {
 961                 fprintf(stderr, "%s: could not launch network script\n",
 962                         setup_script);
 963                 return -1;
 964             }
 965         }
 966     return 0;
 967 }
 968
 969 static int net_tap_init(VLANState *vlan, const char *model,
 970                         const char *name, const char *ifname1,
 971                         const char *setup_script, const char *down_script)
 972 {
 973     TAPState *s;
 974     int fd;
 975     char ifname[128];
 976
 977     if (ifname1 != NULL)
 978         pstrcpy(ifname, sizeof(ifname), ifname1);
 979     else
 980         ifname[0] = '\0';
 981     TFR(fd = tap_open(ifname, sizeof(ifname)));
 982     if (fd < 0)
 983         return -1;
 984
 985     if (!setup_script || !strcmp(setup_script, "no"))
 986         setup_script = "";
 987     if (setup_script[0] != '\0') {
 988         if (launch_script(setup_script, ifname, fd))
 989             return -1;
 990     }
 991     s = net_tap_fd_init(vlan, model, name, fd);
 992     if (!s)
 993         return -1;
 994     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
 995              "ifname=%s,script=%s,downscript=%s",
 996              ifname, setup_script, down_script);
 997     if (down_script && strcmp(down_script, "no")) {
 998         snprintf(s->down_script, sizeof(s->down_script), "%s", down_script);
 999         snprintf(s->down_script_arg, sizeof(s->down_script_arg), "%s", ifname);
1000     }
1001     return 0;
1002 }
1003
1004 #endif /* !_WIN32 */
1005
1006 #if defined(CONFIG_VDE)
1007 typedef struct VDEState {
1008     VLANClientState *vc;
1009     VDECONN *vde;
1010 } VDEState;
1011
1012 static void vde_to_qemu(void *opaque)
1013 {
1014     VDEState *s = opaque;
1015     uint8_t buf[4096];
1016     int size;
1017
1018     size = vde_recv(s->vde, buf, sizeof(buf), 0);
1019     if (size > 0) {
1020         qemu_send_packet(s->vc, buf, size);
1021     }
1022 }
1023
1024 static void vde_from_qemu(void *opaque, const uint8_t *buf, int size)
1025 {
1026     VDEState *s = opaque;
1027     int ret;
1028     for(;;) {
1029         ret = vde_send(s->vde, buf, size, 0);
1030         if (ret < 0 && errno == EINTR) {
1031         } else {
1032             break;
1033         }
1034     }
1035 }
1036
1037 static int net_vde_init(VLANState *vlan, const char *model,
1038                         const char *name, const char *sock,
1039                         int port, const char *group, int mode)
1040 {
1041     VDEState *s;
1042     char *init_group = strlen(group) ? (char *)group : NULL;
1043     char *init_sock = strlen(sock) ? (char *)sock : NULL;
1044
1045     struct vde_open_args args = {
1046         .port = port,
1047         .group = init_group,
1048         .mode = mode,
1049     };
1050
1051     s = qemu_mallocz(sizeof(VDEState));
1052     if (!s)
1053         return -1;
1054     s->vde = vde_open(init_sock, "QEMU", &args);
1055     if (!s->vde){
1056         free(s);
1057         return -1;
1058     }
1059     s->vc = qemu_new_vlan_client(vlan, model, name, vde_from_qemu, NULL, s);
1060     qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
1061     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "sock=%s,fd=%d",
1062              sock, vde_datafd(s->vde));
1063     return 0;
1064 }
1065 #endif
1066
1067 /* network connection */
1068 typedef struct NetSocketState {
1069     VLANClientState *vc;
1070     int fd;
1071     int state; /* 0 = getting length, 1 = getting data */
1072     int index;
1073     int packet_len;
1074     uint8_t buf[4096];
1075     struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
1076 } NetSocketState;
1077
1078 typedef struct NetSocketListenState {
1079     VLANState *vlan;
1080     char *model;
1081     char *name;
1082     int fd;
1083 } NetSocketListenState;
1084
1085 /* XXX: we consider we can send the whole packet without blocking */
1086 static void net_socket_receive(void *opaque, const uint8_t *buf, int size)
1087 {
1088     NetSocketState *s = opaque;
1089     uint32_t len;
1090     len = htonl(size);
1091
1092     send_all(s->fd, (const uint8_t *)&len, sizeof(len));
1093     send_all(s->fd, buf, size);
1094 }
1095
1096 static void net_socket_receive_dgram(void *opaque, const uint8_t *buf, int size)
1097 {
1098     NetSocketState *s = opaque;
1099     sendto(s->fd, buf, size, 0,
1100            (struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst));
1101 }
1102
1103 static void net_socket_send(void *opaque)
1104 {
1105     NetSocketState *s = opaque;
1106     int l, size, err;
1107     uint8_t buf1[4096];
1108     const uint8_t *buf;
1109
1110     size = recv(s->fd, buf1, sizeof(buf1), 0);
1111     if (size < 0) {
1112         err = socket_error();
1113         if (err != EWOULDBLOCK)
1114             goto eoc;
1115     } else if (size == 0) {
1116         /* end of connection */
1117     eoc:
1118         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1119         closesocket(s->fd);
1120         return;
1121     }
1122     buf = buf1;
1123     while (size > 0) {
1124         /* reassemble a packet from the network */
1125         switch(s->state) {
1126         case 0:
1127             l = 4 - s->index;
1128             if (l > size)
1129                 l = size;
1130             memcpy(s->buf + s->index, buf, l);
1131             buf += l;
1132             size -= l;
1133             s->index += l;
1134             if (s->index == 4) {
1135                 /* got length */
1136                 s->packet_len = ntohl(*(uint32_t *)s->buf);
1137                 s->index = 0;
1138                 s->state = 1;
1139             }
1140             break;
1141         case 1:
1142             l = s->packet_len - s->index;
1143             if (l > size)
1144                 l = size;
1145             memcpy(s->buf + s->index, buf, l);
1146             s->index += l;
1147             buf += l;
1148             size -= l;
1149             if (s->index >= s->packet_len) {
1150                 qemu_send_packet(s->vc, s->buf, s->packet_len);
1151                 s->index = 0;
1152                 s->state = 0;
1153             }
1154             break;
1155         }
1156     }
1157 }
1158
1159 static void net_socket_send_dgram(void *opaque)
1160 {
1161     NetSocketState *s = opaque;
1162     int size;
1163
1164     size = recv(s->fd, s->buf, sizeof(s->buf), 0);
1165     if (size < 0)
1166         return;
1167     if (size == 0) {
1168         /* end of connection */
1169         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1170         return;
1171     }
1172     qemu_send_packet(s->vc, s->buf, size);
1173 }
1174
1175 static int net_socket_mcast_create(struct sockaddr_in *mcastaddr)
1176 {
1177     struct ip_mreq imr;
1178     int fd;
1179     int val, ret;
1180     if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
1181         fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n",
1182                 inet_ntoa(mcastaddr->sin_addr),
1183                 (int)ntohl(mcastaddr->sin_addr.s_addr));
1184         return -1;
1185
1186     }
1187     fd = socket(PF_INET, SOCK_DGRAM, 0);
1188     if (fd < 0) {
1189         perror("socket(PF_INET, SOCK_DGRAM)");
1190         return -1;
1191     }
1192
1193     val = 1;
1194     ret=setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
1195                    (const char *)&val, sizeof(val));
1196     if (ret < 0) {
1197         perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
1198         goto fail;
1199     }
1200
1201     ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
1202     if (ret < 0) {
1203         perror("bind");
1204         goto fail;
1205     }
1206
1207     /* Add host to multicast group */
1208     imr.imr_multiaddr = mcastaddr->sin_addr;
1209     imr.imr_interface.s_addr = htonl(INADDR_ANY);
1210
1211     ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1212                      (const char *)&imr, sizeof(struct ip_mreq));
1213     if (ret < 0) {
1214         perror("setsockopt(IP_ADD_MEMBERSHIP)");
1215         goto fail;
1216     }
1217
1218     /* Force mcast msgs to loopback (eg. several QEMUs in same host */
1219     val = 1;
1220     ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1221                    (const char *)&val, sizeof(val));
1222     if (ret < 0) {
1223         perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
1224         goto fail;
1225     }
1226
1227     socket_set_nonblock(fd);
1228     return fd;
1229 fail:
1230     if (fd >= 0)
1231         closesocket(fd);
1232     return -1;
1233 }
1234
1235 static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
1236                                                 const char *model,
1237                                                 const char *name,
1238                                                 int fd, int is_connected)
1239 {
1240     struct sockaddr_in saddr;
1241     int newfd;
1242     socklen_t saddr_len;
1243     NetSocketState *s;
1244
1245     /* fd passed: multicast: "learn" dgram_dst address from bound address and save it
1246      * Because this may be "shared" socket from a "master" process, datagrams would be recv()
1247      * by ONLY ONE process: we must "clone" this dgram socket --jjo
1248      */
1249
1250     if (is_connected) {
1251         if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
1252             /* must be bound */
1253             if (saddr.sin_addr.s_addr==0) {
1254                 fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, cannot setup multicast dst addr\n",
1255                         fd);
1256                 return NULL;
1257             }
1258             /* clone dgram socket */
1259             newfd = net_socket_mcast_create(&saddr);
1260             if (newfd < 0) {
1261                 /* error already reported by net_socket_mcast_create() */
1262                 close(fd);
1263                 return NULL;
1264             }
1265             /* clone newfd to fd, close newfd */
1266             dup2(newfd, fd);
1267             close(newfd);
1268
1269         } else {
1270             fprintf(stderr, "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
1271                     fd, strerror(errno));
1272             return NULL;
1273         }
1274     }
1275
1276     s = qemu_mallocz(sizeof(NetSocketState));
1277     if (!s)
1278         return NULL;
1279     s->fd = fd;
1280
1281     s->vc = qemu_new_vlan_client(vlan, model, name, net_socket_receive_dgram, NULL, s);
1282     qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s);
1283
1284     /* mcast: save bound address as dst */
1285     if (is_connected) s->dgram_dst=saddr;
1286
1287     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1288             "socket: fd=%d (%s mcast=%s:%d)",
1289             fd, is_connected? "cloned" : "",
1290             inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1291     return s;
1292 }
1293
1294 static void net_socket_connect(void *opaque)
1295 {
1296     NetSocketState *s = opaque;
1297     qemu_set_fd_handler(s->fd, net_socket_send, NULL, s);
1298 }
1299
1300 static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
1301                                                  const char *model,
1302                                                  const char *name,
1303                                                  int fd, int is_connected)
1304 {
1305     NetSocketState *s;
1306     s = qemu_mallocz(sizeof(NetSocketState));
1307     if (!s)
1308         return NULL;
1309     s->fd = fd;
1310     s->vc = qemu_new_vlan_client(vlan, model, name,
1311                                  net_socket_receive, NULL, s);
1312     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1313              "socket: fd=%d", fd);
1314     if (is_connected) {
1315         net_socket_connect(s);
1316     } else {
1317         qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
1318     }
1319     return s;
1320 }
1321
1322 static NetSocketState *net_socket_fd_init(VLANState *vlan,
1323                                           const char *model, const char *name,
1324                                           int fd, int is_connected)
1325 {
1326     int so_type=-1, optlen=sizeof(so_type);
1327
1328     if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type,
1329         (socklen_t *)&optlen)< 0) {
1330         fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n", fd);
1331         return NULL;
1332     }
1333     switch(so_type) {
1334     case SOCK_DGRAM:
1335         return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected);
1336     case SOCK_STREAM:
1337         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1338     default:
1339         /* who knows ... this could be a eg. a pty, do warn and continue as stream */
1340         fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
1341         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1342     }
1343     return NULL;
1344 }
1345
1346 static void net_socket_accept(void *opaque)
1347 {
1348     NetSocketListenState *s = opaque;
1349     NetSocketState *s1;
1350     struct sockaddr_in saddr;
1351     socklen_t len;
1352     int fd;
1353
1354     for(;;) {
1355         len = sizeof(saddr);
1356         fd = accept(s->fd, (struct sockaddr *)&saddr, &len);
1357         if (fd < 0 && errno != EINTR) {
1358             return;
1359         } else if (fd >= 0) {
1360             break;
1361         }
1362     }
1363     s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1);
1364     if (!s1) {
1365         closesocket(fd);
1366     } else {
1367         snprintf(s1->vc->info_str, sizeof(s1->vc->info_str),
1368                  "socket: connection from %s:%d",
1369                  inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1370     }
1371 }
1372
1373 static int net_socket_listen_init(VLANState *vlan,
1374                                   const char *model,
1375                                   const char *name,
1376                                   const char *host_str)
1377 {
1378     NetSocketListenState *s;
1379     int fd, val, ret;
1380     struct sockaddr_in saddr;
1381
1382     if (parse_host_port(&saddr, host_str) < 0)
1383         return -1;
1384
1385     s = qemu_mallocz(sizeof(NetSocketListenState));
1386     if (!s)
1387         return -1;
1388
1389     fd = socket(PF_INET, SOCK_STREAM, 0);
1390     if (fd < 0) {
1391         perror("socket");
1392         return -1;
1393     }
1394     socket_set_nonblock(fd);
1395
1396     /* allow fast reuse */
1397     val = 1;
1398     setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));
1399
1400     ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
1401     if (ret < 0) {
1402         perror("bind");
1403         return -1;
1404     }
1405     ret = listen(fd, 0);
1406     if (ret < 0) {
1407         perror("listen");
1408         return -1;
1409     }
1410     s->vlan = vlan;
1411     s->model = strdup(model);
1412     s->name = strdup(name);
1413     s->fd = fd;
1414     qemu_set_fd_handler(fd, net_socket_accept, NULL, s);
1415     return 0;
1416 }
1417
1418 static int net_socket_connect_init(VLANState *vlan,
1419                                    const char *model,
1420                                    const char *name,
1421                                    const char *host_str)
1422 {
1423     NetSocketState *s;
1424     int fd, connected, ret, err;
1425     struct sockaddr_in saddr;
1426
1427     if (parse_host_port(&saddr, host_str) < 0)
1428         return -1;
1429
1430     fd = socket(PF_INET, SOCK_STREAM, 0);
1431     if (fd < 0) {
1432         perror("socket");
1433         return -1;
1434     }
1435     socket_set_nonblock(fd);
1436
1437     connected = 0;
1438     for(;;) {
1439         ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
1440         if (ret < 0) {
1441             err = socket_error();
1442             if (err == EINTR || err == EWOULDBLOCK) {
1443             } else if (err == EINPROGRESS) {
1444                 break;
1445 #ifdef _WIN32
1446             } else if (err == WSAEALREADY) {
1447                 break;
1448 #endif
1449             } else {
1450                 perror("connect");
1451                 closesocket(fd);
1452                 return -1;
1453             }
1454         } else {
1455             connected = 1;
1456             break;
1457         }
1458     }
1459     s = net_socket_fd_init(vlan, model, name, fd, connected);
1460     if (!s)
1461         return -1;
1462     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1463              "socket: connect to %s:%d",
1464              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1465     return 0;
1466 }
1467
1468 static int net_socket_mcast_init(VLANState *vlan,
1469                                  const char *model,
1470                                  const char *name,
1471                                  const char *host_str)
1472 {
1473     NetSocketState *s;
1474     int fd;
1475     struct sockaddr_in saddr;
1476
1477     if (parse_host_port(&saddr, host_str) < 0)
1478         return -1;
1479
1480
1481     fd = net_socket_mcast_create(&saddr);
1482     if (fd < 0)
1483         return -1;
1484
1485     s = net_socket_fd_init(vlan, model, name, fd, 0);
1486     if (!s)
1487         return -1;
1488
1489     s->dgram_dst = saddr;
1490
1491     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1492              "socket: mcast=%s:%d",
1493              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1494     return 0;
1495
1496 }
1497
1498 /* find or alloc a new VLAN */
1499 VLANState *qemu_find_vlan(int id)
1500 {
1501     VLANState **pvlan, *vlan;
1502     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1503         if (vlan->id == id)
1504             return vlan;
1505     }
1506     vlan = qemu_mallocz(sizeof(VLANState));
1507     if (!vlan)
1508         return NULL;
1509     vlan->id = id;
1510     vlan->next = NULL;
1511     pvlan = &first_vlan;
1512     while (*pvlan != NULL)
1513         pvlan = &(*pvlan)->next;
1514     *pvlan = vlan;
1515     return vlan;
1516 }
1517
1518 void qemu_check_nic_model(NICInfo *nd, const char *model)
1519 {
1520     const char *models[2];
1521
1522     models[0] = model;
1523     models[1] = NULL;
1524
1525     qemu_check_nic_model_list(nd, models, model);
1526 }
1527
1528 void qemu_check_nic_model_list(NICInfo *nd, const char * const *models,
1529                                const char *default_model)
1530 {
1531     int i, exit_status = 0;
1532
1533     if (!nd->model)
1534         nd->model = strdup(default_model);
1535
1536     if (strcmp(nd->model, "?") != 0) {
1537         for (i = 0 ; models[i]; i++)
1538             if (strcmp(nd->model, models[i]) == 0)
1539                 return;
1540
1541         fprintf(stderr, "qemu: Unsupported NIC model: %s\n", nd->model);
1542         exit_status = 1;
1543     }
1544
1545     fprintf(stderr, "qemu: Supported NIC models: ");
1546     for (i = 0 ; models[i]; i++)
1547         fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
1548
1549     exit(exit_status);
1550 }
1551
1552 int net_client_init(const char *device, const char *p)
1553 {
1554     char buf[1024];
1555     int vlan_id, ret;
1556     VLANState *vlan;
1557     char *name = NULL;
1558
1559     vlan_id = 0;
1560     if (get_param_value(buf, sizeof(buf), "vlan", p)) {
1561         vlan_id = strtol(buf, NULL, 0);
1562     }
1563     vlan = qemu_find_vlan(vlan_id);
1564     if (!vlan) {
1565         fprintf(stderr, "Could not create vlan %d\n", vlan_id);
1566         return -1;
1567     }
1568     if (get_param_value(buf, sizeof(buf), "name", p)) {
1569         name = strdup(buf);
1570     }
1571     if (!strcmp(device, "nic")) {
1572         NICInfo *nd;
1573         uint8_t *macaddr;
1574
1575         if (nb_nics >= MAX_NICS) {
1576             fprintf(stderr, "Too Many NICs\n");
1577             return -1;
1578         }
1579         nd = &nd_table[nb_nics];
1580         macaddr = nd->macaddr;
1581         macaddr[0] = 0x52;
1582         macaddr[1] = 0x54;
1583         macaddr[2] = 0x00;
1584         macaddr[3] = 0x12;
1585         macaddr[4] = 0x34;
1586         macaddr[5] = 0x56 + nb_nics;
1587
1588         if (get_param_value(buf, sizeof(buf), "macaddr", p)) {
1589             if (parse_macaddr(macaddr, buf) < 0) {
1590                 fprintf(stderr, "invalid syntax for ethernet address\n");
1591                 return -1;
1592             }
1593         }
1594         if (get_param_value(buf, sizeof(buf), "model", p)) {
1595             nd->model = strdup(buf);
1596         }
1597         nd->vlan = vlan;
1598         nd->name = name;
1599         name = NULL;
1600         nb_nics++;
1601         vlan->nb_guest_devs++;
1602         ret = 0;
1603     } else
1604     if (!strcmp(device, "none")) {
1605         /* does nothing. It is needed to signal that no network cards
1606            are wanted */
1607         ret = 0;
1608     } else
1609 #ifdef CONFIG_SLIRP
1610     if (!strcmp(device, "user")) {
1611         if (get_param_value(buf, sizeof(buf), "hostname", p)) {
1612             pstrcpy(slirp_hostname, sizeof(slirp_hostname), buf);
1613         }
1614         if (get_param_value(buf, sizeof(buf), "restrict", p)) {
1615             slirp_restrict = (buf[0] == 'y') ? 1 : 0;
1616         }
1617         if (get_param_value(buf, sizeof(buf), "ip", p)) {
1618             slirp_ip = strdup(buf);
1619         }
1620         vlan->nb_host_devs++;
1621         ret = net_slirp_init(vlan, device, name);
1622     } else
1623 #endif
1624 #ifdef _WIN32
1625     if (!strcmp(device, "tap")) {
1626         char ifname[64];
1627         if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
1628             fprintf(stderr, "tap: no interface name\n");
1629             return -1;
1630         }
1631         vlan->nb_host_devs++;
1632         ret = tap_win32_init(vlan, device, name, ifname);
1633     } else
1634 #elif defined (_AIX)
1635 #else
1636     if (!strcmp(device, "tap")) {
1637         char ifname[64];
1638         char setup_script[1024], down_script[1024];
1639         int fd;
1640         vlan->nb_host_devs++;
1641         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
1642             fd = strtol(buf, NULL, 0);
1643             fcntl(fd, F_SETFL, O_NONBLOCK);
1644             ret = -1;
1645             if (net_tap_fd_init(vlan, device, name, fd))
1646                 ret = 0;
1647         } else {
1648             if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
1649                 ifname[0] = '\0';
1650             }
1651             if (get_param_value(setup_script, sizeof(setup_script), "script", p) == 0) {
1652                 pstrcpy(setup_script, sizeof(setup_script), DEFAULT_NETWORK_SCRIPT);
1653             }
1654             if (get_param_value(down_script, sizeof(down_script), "downscript", p) == 0) {
1655                 pstrcpy(down_script, sizeof(down_script), DEFAULT_NETWORK_DOWN_SCRIPT);
1656             }
1657             ret = net_tap_init(vlan, device, name, ifname, setup_script, down_script);
1658         }
1659     } else
1660 #endif
1661     if (!strcmp(device, "socket")) {
1662         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
1663             int fd;
1664             fd = strtol(buf, NULL, 0);
1665             ret = -1;
1666             if (net_socket_fd_init(vlan, device, name, fd, 1))
1667                 ret = 0;
1668         } else if (get_param_value(buf, sizeof(buf), "listen", p) > 0) {
1669             ret = net_socket_listen_init(vlan, device, name, buf);
1670         } else if (get_param_value(buf, sizeof(buf), "connect", p) > 0) {
1671             ret = net_socket_connect_init(vlan, device, name, buf);
1672         } else if (get_param_value(buf, sizeof(buf), "mcast", p) > 0) {
1673             ret = net_socket_mcast_init(vlan, device, name, buf);
1674         } else {
1675             fprintf(stderr, "Unknown socket options: %s\n", p);
1676             return -1;
1677         }
1678         vlan->nb_host_devs++;
1679     } else
1680 #ifdef CONFIG_VDE
1681     if (!strcmp(device, "vde")) {
1682         char vde_sock[1024], vde_group[512];
1683         int vde_port, vde_mode;
1684         vlan->nb_host_devs++;
1685         if (get_param_value(vde_sock, sizeof(vde_sock), "sock", p) <= 0) {
1686             vde_sock[0] = '\0';
1687         }
1688         if (get_param_value(buf, sizeof(buf), "port", p) > 0) {
1689             vde_port = strtol(buf, NULL, 10);
1690         } else {
1691             vde_port = 0;
1692         }
1693         if (get_param_value(vde_group, sizeof(vde_group), "group", p) <= 0) {
1694             vde_group[0] = '\0';
1695         }
1696         if (get_param_value(buf, sizeof(buf), "mode", p) > 0) {
1697             vde_mode = strtol(buf, NULL, 8);
1698         } else {
1699             vde_mode = 0700;
1700         }
1701         ret = net_vde_init(vlan, device, name, vde_sock, vde_port, vde_group, vde_mode);
1702     } else
1703 #endif
1704     {
1705         fprintf(stderr, "Unknown network device: %s\n", device);
1706         if (name)
1707             free(name);
1708         return -1;
1709     }
1710     if (ret < 0) {
1711         fprintf(stderr, "Could not initialize device '%s'\n", device);
1712     }
1713     if (name)
1714         free(name);
1715     return ret;
1716 }
1717
1718 int net_client_parse(const char *str)
1719 {
1720     const char *p;
1721     char *q;
1722     char device[64];
1723
1724     p = str;
1725     q = device;
1726     while (*p != '\0' && *p != ',') {
1727         if ((q - device) < sizeof(device) - 1)
1728             *q++ = *p;
1729         p++;
1730     }
1731     *q = '\0';
1732     if (*p == ',')
1733         p++;
1734
1735     return net_client_init(device, p);
1736 }
1737
1738 void do_info_network(void)
1739 {
1740     VLANState *vlan;
1741     VLANClientState *vc;
1742
1743     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1744         term_printf("VLAN %d devices:\n", vlan->id);
1745         for(vc = vlan->first_client; vc != NULL; vc = vc->next)
1746             term_printf("  %s: %s\n", vc->name, vc->info_str);
1747     }
1748 }
1749
1750 int do_set_link(const char *name, const char *up_or_down)
1751 {
1752     VLANState *vlan;
1753     VLANClientState *vc = NULL;
1754
1755     for (vlan = first_vlan; vlan != NULL; vlan = vlan->next)
1756         for (vc = vlan->first_client; vc != NULL; vc = vc->next)
1757             if (strcmp(vc->name, name) == 0)
1758                 goto done;
1759 done:
1760
1761     if (!vc) {
1762         term_printf("could not find network device '%s'", name);
1763         return 0;
1764     }
1765
1766     if (strcmp(up_or_down, "up") == 0)
1767         vc->link_down = 0;
1768     else if (strcmp(up_or_down, "down") == 0)
1769         vc->link_down = 1;
1770     else
1771         term_printf("invalid link status '%s'; only 'up' or 'down' valid\n",
1772                     up_or_down);
1773
1774     if (vc->link_status_changed)
1775         vc->link_status_changed(vc);
1776
1777     return 1;
1778 }
1779
1780 void net_cleanup(void)
1781 {
1782     VLANState *vlan;
1783
1784 #if !defined(_WIN32)
1785     /* close network clients */
1786     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1787         VLANClientState *vc;
1788
1789         for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
1790             if (vc->fd_read == tap_receive) {
1791                 TAPState *s = vc->opaque;
1792
1793                 if (s->down_script[0])
1794                     launch_script(s->down_script, s->down_script_arg, s->fd);
1795             }
1796 #if defined(CONFIG_VDE)
1797             if (vc->fd_read == vde_from_qemu) {
1798                 VDEState *s = vc->opaque;
1799                 vde_close(s->vde);
1800             }
1801 #endif
1802         }
1803     }
1804 #endif
1805 }
1806
1807 void net_client_check(void)
1808 {
1809     VLANState *vlan;
1810
1811     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1812         if (vlan->nb_guest_devs == 0 && vlan->nb_host_devs == 0)
1813             continue;
1814         if (vlan->nb_guest_devs == 0)
1815             fprintf(stderr, "Warning: vlan %d with no nics\n", vlan->id);
1816         if (vlan->nb_host_devs == 0)
1817             fprintf(stderr,
1818                     "Warning: vlan %d is not connected to host network\n",
1819                     vlan->id);
1820     }
1821 }