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 ssize_t qemu_sendv_packet(VLANClientState *vc1, const struct iovec *iov,
 425                           int iovcnt)
 426 {
 427     VLANState *vlan = vc1->vlan;
 428     VLANClientState *vc;
 429     ssize_t max_len = 0;
 430
 431     for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
 432         ssize_t len = 0;
 433
 434         if (vc == vc1)
 435             continue;
 436
 437         if (vc->fd_readv)
 438             len = vc->fd_readv(vc->opaque, iov, iovcnt);
 439         else if (vc->fd_read)
 440             len = vc_sendv_compat(vc, iov, iovcnt);
 441
 442         max_len = MAX(max_len, len);
 443     }
 444
 445     return max_len;
 446 }
 447
 448 #if defined(CONFIG_SLIRP)
 449
 450 /* slirp network adapter */
 451
 452 static int slirp_inited;
 453 static int slirp_restrict;
 454 static char *slirp_ip;
 455 static VLANClientState *slirp_vc;
 456
 457 int slirp_can_output(void)
 458 {
 459     return !slirp_vc || qemu_can_send_packet(slirp_vc);
 460 }
 461
 462 void slirp_output(const uint8_t *pkt, int pkt_len)
 463 {
 464 #ifdef DEBUG_SLIRP
 465     printf("slirp output:\n");
 466     hex_dump(stdout, pkt, pkt_len);
 467 #endif
 468     if (!slirp_vc)
 469         return;
 470     qemu_send_packet(slirp_vc, pkt, pkt_len);
 471 }
 472
 473 int slirp_is_inited(void)
 474 {
 475     return slirp_inited;
 476 }
 477
 478 static void slirp_receive(void *opaque, const uint8_t *buf, int size)
 479 {
 480 #ifdef DEBUG_SLIRP
 481     printf("slirp input:\n");
 482     hex_dump(stdout, buf, size);
 483 #endif
 484     slirp_input(buf, size);
 485 }
 486
 487 static int net_slirp_init(VLANState *vlan, const char *model, const char *name)
 488 {
 489     if (!slirp_inited) {
 490         slirp_inited = 1;
 491         slirp_init(slirp_restrict, slirp_ip);
 492     }
 493     slirp_vc = qemu_new_vlan_client(vlan, model, name,
 494                                     slirp_receive, NULL, NULL);
 495     slirp_vc->info_str[0] = '\0';
 496     return 0;
 497 }
 498
 499 void net_slirp_redir(const char *redir_str)
 500 {
 501     int is_udp;
 502     char buf[256], *r;
 503     const char *p;
 504     struct in_addr guest_addr;
 505     int host_port, guest_port;
 506
 507     if (!slirp_inited) {
 508         slirp_inited = 1;
 509         slirp_init(slirp_restrict, slirp_ip);
 510     }
 511
 512     p = redir_str;
 513     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 514         goto fail;
 515     if (!strcmp(buf, "tcp")) {
 516         is_udp = 0;
 517     } else if (!strcmp(buf, "udp")) {
 518         is_udp = 1;
 519     } else {
 520         goto fail;
 521     }
 522
 523     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 524         goto fail;
 525     host_port = strtol(buf, &r, 0);
 526     if (r == buf)
 527         goto fail;
 528
 529     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 530         goto fail;
 531     if (buf[0] == '\0') {
 532         pstrcpy(buf, sizeof(buf), "10.0.2.15");
 533     }
 534     if (!inet_aton(buf, &guest_addr))
 535         goto fail;
 536
 537     guest_port = strtol(p, &r, 0);
 538     if (r == p)
 539         goto fail;
 540
 541     if (slirp_redir(is_udp, host_port, guest_addr, guest_port) < 0) {
 542         fprintf(stderr, "qemu: could not set up redirection\n");
 543         exit(1);
 544     }
 545     return;
 546  fail:
 547     fprintf(stderr, "qemu: syntax: -redir [tcp|udp]:host-port:[guest-host]:guest-port\n");
 548     exit(1);
 549 }
 550
 551 #ifndef _WIN32
 552
 553 static char smb_dir[1024];
 554
 555 static void erase_dir(char *dir_name)
 556 {
 557     DIR *d;
 558     struct dirent *de;
 559     char filename[1024];
 560
 561     /* erase all the files in the directory */
 562     if ((d = opendir(dir_name)) != 0) {
 563         for(;;) {
 564             de = readdir(d);
 565             if (!de)
 566                 break;
 567             if (strcmp(de->d_name, ".") != 0 &&
 568                 strcmp(de->d_name, "..") != 0) {
 569                 snprintf(filename, sizeof(filename), "%s/%s",
 570                          smb_dir, de->d_name);
 571                 if (unlink(filename) != 0)  /* is it a directory? */
 572                     erase_dir(filename);
 573             }
 574         }
 575         closedir(d);
 576         rmdir(dir_name);
 577     }
 578 }
 579
 580 /* automatic user mode samba server configuration */
 581 static void smb_exit(void)
 582 {
 583     erase_dir(smb_dir);
 584 }
 585
 586 /* automatic user mode samba server configuration */
 587 void net_slirp_smb(const char *exported_dir)
 588 {
 589     char smb_conf[1024];
 590     char smb_cmdline[1024];
 591     FILE *f;
 592
 593     if (!slirp_inited) {
 594         slirp_inited = 1;
 595         slirp_init(slirp_restrict, slirp_ip);
 596     }
 597
 598     /* XXX: better tmp dir construction */
 599     snprintf(smb_dir, sizeof(smb_dir), "/tmp/qemu-smb.%d", getpid());
 600     if (mkdir(smb_dir, 0700) < 0) {
 601         fprintf(stderr, "qemu: could not create samba server dir '%s'\n", smb_dir);
 602         exit(1);
 603     }
 604     snprintf(smb_conf, sizeof(smb_conf), "%s/%s", smb_dir, "smb.conf");
 605
 606     f = fopen(smb_conf, "w");
 607     if (!f) {
 608         fprintf(stderr, "qemu: could not create samba server configuration file '%s'\n", smb_conf);
 609         exit(1);
 610     }
 611     fprintf(f,
 612             "[global]\n"
 613             "private dir=%s\n"
 614             "smb ports=0\n"
 615             "socket address=127.0.0.1\n"
 616             "pid directory=%s\n"
 617             "lock directory=%s\n"
 618             "log file=%s/log.smbd\n"
 619             "smb passwd file=%s/smbpasswd\n"
 620             "security = share\n"
 621             "[qemu]\n"
 622             "path=%s\n"
 623             "read only=no\n"
 624             "guest ok=yes\n",
 625             smb_dir,
 626             smb_dir,
 627             smb_dir,
 628             smb_dir,
 629             smb_dir,
 630             exported_dir
 631             );
 632     fclose(f);
 633     atexit(smb_exit);
 634
 635     snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -s %s",
 636              SMBD_COMMAND, smb_conf);
 637
 638     slirp_add_exec(0, smb_cmdline, 4, 139);
 639 }
 640
 641 #endif /* !defined(_WIN32) */
 642 void do_info_slirp(void)
 643 {
 644     slirp_stats();
 645 }
 646
 647 #endif /* CONFIG_SLIRP */
 648
 649 #if !defined(_WIN32)
 650
 651 typedef struct TAPState {
 652     VLANClientState *vc;
 653     int fd;
 654     char down_script[1024];
 655     char down_script_arg[128];
 656 } TAPState;
 657
 658 #ifdef HAVE_IOVEC
 659 static ssize_t tap_receive_iov(void *opaque, const struct iovec *iov,
 660                                int iovcnt)
 661 {
 662     TAPState *s = opaque;
 663     ssize_t len;
 664
 665     do {
 666         len = writev(s->fd, iov, iovcnt);
 667     } while (len == -1 && (errno == EINTR || errno == EAGAIN));
 668
 669     return len;
 670 }
 671 #endif
 672
 673 static void tap_receive(void *opaque, const uint8_t *buf, int size)
 674 {
 675     TAPState *s = opaque;
 676     int ret;
 677     for(;;) {
 678         ret = write(s->fd, buf, size);
 679         if (ret < 0 && (errno == EINTR || errno == EAGAIN)) {
 680         } else {
 681             break;
 682         }
 683     }
 684 }
 685
 686 static void tap_send(void *opaque)
 687 {
 688     TAPState *s = opaque;
 689     uint8_t buf[4096];
 690     int size;
 691
 692 #ifdef __sun__
 693     struct strbuf sbuf;
 694     int f = 0;
 695     sbuf.maxlen = sizeof(buf);
 696     sbuf.buf = buf;
 697     size = getmsg(s->fd, NULL, &sbuf, &f) >=0 ? sbuf.len : -1;
 698 #else
 699     size = read(s->fd, buf, sizeof(buf));
 700 #endif
 701     if (size > 0) {
 702         qemu_send_packet(s->vc, buf, size);
 703     }
 704 }
 705
 706 /* fd support */
 707
 708 static TAPState *net_tap_fd_init(VLANState *vlan,
 709                                  const char *model,
 710                                  const char *name,
 711                                  int fd)
 712 {
 713     TAPState *s;
 714
 715     s = qemu_mallocz(sizeof(TAPState));
 716     if (!s)
 717         return NULL;
 718     s->fd = fd;
 719     s->vc = qemu_new_vlan_client(vlan, model, name, tap_receive, NULL, s);
 720 #ifdef HAVE_IOVEC
 721     s->vc->fd_readv = tap_receive_iov;
 722 #endif
 723     qemu_set_fd_handler(s->fd, tap_send, NULL, s);
 724     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "fd=%d", fd);
 725     return s;
 726 }
 727
 728 #if defined (_BSD) || defined (__FreeBSD_kernel__)
 729 static int tap_open(char *ifname, int ifname_size)
 730 {
 731     int fd;
 732     char *dev;
 733     struct stat s;
 734
 735     TFR(fd = open("/dev/tap", O_RDWR));
 736     if (fd < 0) {
 737         fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n");
 738         return -1;
 739     }
 740
 741     fstat(fd, &s);
 742     dev = devname(s.st_rdev, S_IFCHR);
 743     pstrcpy(ifname, ifname_size, dev);
 744
 745     fcntl(fd, F_SETFL, O_NONBLOCK);
 746     return fd;
 747 }
 748 #elif defined(__sun__)
 749 #define TUNNEWPPA       (('T'<<16) | 0x0001)
 750 /*
 751  * Allocate TAP device, returns opened fd.
 752  * Stores dev name in the first arg(must be large enough).
 753  */
 754 int tap_alloc(char *dev, size_t dev_size)
 755 {
 756     int tap_fd, if_fd, ppa = -1;
 757     static int ip_fd = 0;
 758     char *ptr;
 759
 760     static int arp_fd = 0;
 761     int ip_muxid, arp_muxid;
 762     struct strioctl  strioc_if, strioc_ppa;
 763     int link_type = I_PLINK;;
 764     struct lifreq ifr;
 765     char actual_name[32] = "";
 766
 767     memset(&ifr, 0x0, sizeof(ifr));
 768
 769     if( *dev ){
 770        ptr = dev;
 771        while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
 772        ppa = atoi(ptr);
 773     }
 774
 775     /* Check if IP device was opened */
 776     if( ip_fd )
 777        close(ip_fd);
 778
 779     TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
 780     if (ip_fd < 0) {
 781        syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)");
 782        return -1;
 783     }
 784
 785     TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
 786     if (tap_fd < 0) {
 787        syslog(LOG_ERR, "Can't open /dev/tap");
 788        return -1;
 789     }
 790
 791     /* Assign a new PPA and get its unit number. */
 792     strioc_ppa.ic_cmd = TUNNEWPPA;
 793     strioc_ppa.ic_timout = 0;
 794     strioc_ppa.ic_len = sizeof(ppa);
 795     strioc_ppa.ic_dp = (char *)&ppa;
 796     if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
 797        syslog (LOG_ERR, "Can't assign new interface");
 798
 799     TFR(if_fd = open("/dev/tap", O_RDWR, 0));
 800     if (if_fd < 0) {
 801        syslog(LOG_ERR, "Can't open /dev/tap (2)");
 802        return -1;
 803     }
 804     if(ioctl(if_fd, I_PUSH, "ip") < 0){
 805        syslog(LOG_ERR, "Can't push IP module");
 806        return -1;
 807     }
 808
 809     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
 810         syslog(LOG_ERR, "Can't get flags\n");
 811
 812     snprintf (actual_name, 32, "tap%d", ppa);
 813     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
 814
 815     ifr.lifr_ppa = ppa;
 816     /* Assign ppa according to the unit number returned by tun device */
 817
 818     if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
 819         syslog (LOG_ERR, "Can't set PPA %d", ppa);
 820     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
 821         syslog (LOG_ERR, "Can't get flags\n");
 822     /* Push arp module to if_fd */
 823     if (ioctl (if_fd, I_PUSH, "arp") < 0)
 824         syslog (LOG_ERR, "Can't push ARP module (2)");
 825
 826     /* Push arp module to ip_fd */
 827     if (ioctl (ip_fd, I_POP, NULL) < 0)
 828         syslog (LOG_ERR, "I_POP failed\n");
 829     if (ioctl (ip_fd, I_PUSH, "arp") < 0)
 830         syslog (LOG_ERR, "Can't push ARP module (3)\n");
 831     /* Open arp_fd */
 832     TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
 833     if (arp_fd < 0)
 834        syslog (LOG_ERR, "Can't open %s\n", "/dev/tap");
 835
 836     /* Set ifname to arp */
 837     strioc_if.ic_cmd = SIOCSLIFNAME;
 838     strioc_if.ic_timout = 0;
 839     strioc_if.ic_len = sizeof(ifr);
 840     strioc_if.ic_dp = (char *)&ifr;
 841     if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
 842         syslog (LOG_ERR, "Can't set ifname to arp\n");
 843     }
 844
 845     if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
 846        syslog(LOG_ERR, "Can't link TAP device to IP");
 847        return -1;
 848     }
 849
 850     if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
 851         syslog (LOG_ERR, "Can't link TAP device to ARP");
 852
 853     close (if_fd);
 854
 855     memset(&ifr, 0x0, sizeof(ifr));
 856     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
 857     ifr.lifr_ip_muxid  = ip_muxid;
 858     ifr.lifr_arp_muxid = arp_muxid;
 859
 860     if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
 861     {
 862       ioctl (ip_fd, I_PUNLINK , arp_muxid);
 863       ioctl (ip_fd, I_PUNLINK, ip_muxid);
 864       syslog (LOG_ERR, "Can't set multiplexor id");
 865     }
 866
 867     snprintf(dev, dev_size, "tap%d", ppa);
 868     return tap_fd;
 869 }
 870
 871 static int tap_open(char *ifname, int ifname_size)
 872 {
 873     char  dev[10]="";
 874     int fd;
 875     if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){
 876        fprintf(stderr, "Cannot allocate TAP device\n");
 877        return -1;
 878     }
 879     pstrcpy(ifname, ifname_size, dev);
 880     fcntl(fd, F_SETFL, O_NONBLOCK);
 881     return fd;
 882 }
 883 #elif defined (_AIX)
 884 static int tap_open(char *ifname, int ifname_size)
 885 {
 886     fprintf (stderr, "no tap on AIX\n");
 887     return -1;
 888 }
 889 #else
 890 static int tap_open(char *ifname, int ifname_size)
 891 {
 892     struct ifreq ifr;
 893     int fd, ret;
 894
 895     TFR(fd = open("/dev/net/tun", O_RDWR));
 896     if (fd < 0) {
 897         fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n");
 898         return -1;
 899     }
 900     memset(&ifr, 0, sizeof(ifr));
 901     ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
 902     if (ifname[0] != '\0')
 903         pstrcpy(ifr.ifr_name, IFNAMSIZ, ifname);
 904     else
 905         pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d");
 906     ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
 907     if (ret != 0) {
 908         fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n");
 909         close(fd);
 910         return -1;
 911     }
 912     pstrcpy(ifname, ifname_size, ifr.ifr_name);
 913     fcntl(fd, F_SETFL, O_NONBLOCK);
 914     return fd;
 915 }
 916 #endif
 917
 918 static int launch_script(const char *setup_script, const char *ifname, int fd)
 919 {
 920     int pid, status;
 921     char *args[3];
 922     char **parg;
 923
 924         /* try to launch network script */
 925         pid = fork();
 926         if (pid >= 0) {
 927             if (pid == 0) {
 928                 int open_max = sysconf (_SC_OPEN_MAX), i;
 929                 for (i = 0; i < open_max; i++)
 930                     if (i != STDIN_FILENO &&
 931                         i != STDOUT_FILENO &&
 932                         i != STDERR_FILENO &&
 933                         i != fd)
 934                         close(i);
 935
 936                 parg = args;
 937                 *parg++ = (char *)setup_script;
 938                 *parg++ = (char *)ifname;
 939                 *parg++ = NULL;
 940                 execv(setup_script, args);
 941                 _exit(1);
 942             }
 943             while (waitpid(pid, &status, 0) != pid);
 944             if (!WIFEXITED(status) ||
 945                 WEXITSTATUS(status) != 0) {
 946                 fprintf(stderr, "%s: could not launch network script\n",
 947                         setup_script);
 948                 return -1;
 949             }
 950         }
 951     return 0;
 952 }
 953
 954 static int net_tap_init(VLANState *vlan, const char *model,
 955                         const char *name, const char *ifname1,
 956                         const char *setup_script, const char *down_script)
 957 {
 958     TAPState *s;
 959     int fd;
 960     char ifname[128];
 961
 962     if (ifname1 != NULL)
 963         pstrcpy(ifname, sizeof(ifname), ifname1);
 964     else
 965         ifname[0] = '\0';
 966     TFR(fd = tap_open(ifname, sizeof(ifname)));
 967     if (fd < 0)
 968         return -1;
 969
 970     if (!setup_script || !strcmp(setup_script, "no"))
 971         setup_script = "";
 972     if (setup_script[0] != '\0') {
 973         if (launch_script(setup_script, ifname, fd))
 974             return -1;
 975     }
 976     s = net_tap_fd_init(vlan, model, name, fd);
 977     if (!s)
 978         return -1;
 979     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
 980              "ifname=%s,script=%s,downscript=%s",
 981              ifname, setup_script, down_script);
 982     if (down_script && strcmp(down_script, "no")) {
 983         snprintf(s->down_script, sizeof(s->down_script), "%s", down_script);
 984         snprintf(s->down_script_arg, sizeof(s->down_script_arg), "%s", ifname);
 985     }
 986     return 0;
 987 }
 988
 989 #endif /* !_WIN32 */
 990
 991 #if defined(CONFIG_VDE)
 992 typedef struct VDEState {
 993     VLANClientState *vc;
 994     VDECONN *vde;
 995 } VDEState;
 996
 997 static void vde_to_qemu(void *opaque)
 998 {
 999     VDEState *s = opaque;
1000     uint8_t buf[4096];
1001     int size;
1002
1003     size = vde_recv(s->vde, buf, sizeof(buf), 0);
1004     if (size > 0) {
1005         qemu_send_packet(s->vc, buf, size);
1006     }
1007 }
1008
1009 static void vde_from_qemu(void *opaque, const uint8_t *buf, int size)
1010 {
1011     VDEState *s = opaque;
1012     int ret;
1013     for(;;) {
1014         ret = vde_send(s->vde, buf, size, 0);
1015         if (ret < 0 && errno == EINTR) {
1016         } else {
1017             break;
1018         }
1019     }
1020 }
1021
1022 static int net_vde_init(VLANState *vlan, const char *model,
1023                         const char *name, const char *sock,
1024                         int port, const char *group, int mode)
1025 {
1026     VDEState *s;
1027     char *init_group = strlen(group) ? (char *)group : NULL;
1028     char *init_sock = strlen(sock) ? (char *)sock : NULL;
1029
1030     struct vde_open_args args = {
1031         .port = port,
1032         .group = init_group,
1033         .mode = mode,
1034     };
1035
1036     s = qemu_mallocz(sizeof(VDEState));
1037     if (!s)
1038         return -1;
1039     s->vde = vde_open(init_sock, "QEMU", &args);
1040     if (!s->vde){
1041         free(s);
1042         return -1;
1043     }
1044     s->vc = qemu_new_vlan_client(vlan, model, name, vde_from_qemu, NULL, s);
1045     qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
1046     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "sock=%s,fd=%d",
1047              sock, vde_datafd(s->vde));
1048     return 0;
1049 }
1050 #endif
1051
1052 /* network connection */
1053 typedef struct NetSocketState {
1054     VLANClientState *vc;
1055     int fd;
1056     int state; /* 0 = getting length, 1 = getting data */
1057     int index;
1058     int packet_len;
1059     uint8_t buf[4096];
1060     struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
1061 } NetSocketState;
1062
1063 typedef struct NetSocketListenState {
1064     VLANState *vlan;
1065     char *model;
1066     char *name;
1067     int fd;
1068 } NetSocketListenState;
1069
1070 /* XXX: we consider we can send the whole packet without blocking */
1071 static void net_socket_receive(void *opaque, const uint8_t *buf, int size)
1072 {
1073     NetSocketState *s = opaque;
1074     uint32_t len;
1075     len = htonl(size);
1076
1077     send_all(s->fd, (const uint8_t *)&len, sizeof(len));
1078     send_all(s->fd, buf, size);
1079 }
1080
1081 static void net_socket_receive_dgram(void *opaque, const uint8_t *buf, int size)
1082 {
1083     NetSocketState *s = opaque;
1084     sendto(s->fd, buf, size, 0,
1085            (struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst));
1086 }
1087
1088 static void net_socket_send(void *opaque)
1089 {
1090     NetSocketState *s = opaque;
1091     int l, size, err;
1092     uint8_t buf1[4096];
1093     const uint8_t *buf;
1094
1095     size = recv(s->fd, buf1, sizeof(buf1), 0);
1096     if (size < 0) {
1097         err = socket_error();
1098         if (err != EWOULDBLOCK)
1099             goto eoc;
1100     } else if (size == 0) {
1101         /* end of connection */
1102     eoc:
1103         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1104         closesocket(s->fd);
1105         return;
1106     }
1107     buf = buf1;
1108     while (size > 0) {
1109         /* reassemble a packet from the network */
1110         switch(s->state) {
1111         case 0:
1112             l = 4 - s->index;
1113             if (l > size)
1114                 l = size;
1115             memcpy(s->buf + s->index, buf, l);
1116             buf += l;
1117             size -= l;
1118             s->index += l;
1119             if (s->index == 4) {
1120                 /* got length */
1121                 s->packet_len = ntohl(*(uint32_t *)s->buf);
1122                 s->index = 0;
1123                 s->state = 1;
1124             }
1125             break;
1126         case 1:
1127             l = s->packet_len - s->index;
1128             if (l > size)
1129                 l = size;
1130             memcpy(s->buf + s->index, buf, l);
1131             s->index += l;
1132             buf += l;
1133             size -= l;
1134             if (s->index >= s->packet_len) {
1135                 qemu_send_packet(s->vc, s->buf, s->packet_len);
1136                 s->index = 0;
1137                 s->state = 0;
1138             }
1139             break;
1140         }
1141     }
1142 }
1143
1144 static void net_socket_send_dgram(void *opaque)
1145 {
1146     NetSocketState *s = opaque;
1147     int size;
1148
1149     size = recv(s->fd, s->buf, sizeof(s->buf), 0);
1150     if (size < 0)
1151         return;
1152     if (size == 0) {
1153         /* end of connection */
1154         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1155         return;
1156     }
1157     qemu_send_packet(s->vc, s->buf, size);
1158 }
1159
1160 static int net_socket_mcast_create(struct sockaddr_in *mcastaddr)
1161 {
1162     struct ip_mreq imr;
1163     int fd;
1164     int val, ret;
1165     if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
1166         fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n",
1167                 inet_ntoa(mcastaddr->sin_addr),
1168                 (int)ntohl(mcastaddr->sin_addr.s_addr));
1169         return -1;
1170
1171     }
1172     fd = socket(PF_INET, SOCK_DGRAM, 0);
1173     if (fd < 0) {
1174         perror("socket(PF_INET, SOCK_DGRAM)");
1175         return -1;
1176     }
1177
1178     val = 1;
1179     ret=setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
1180                    (const char *)&val, sizeof(val));
1181     if (ret < 0) {
1182         perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
1183         goto fail;
1184     }
1185
1186     ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
1187     if (ret < 0) {
1188         perror("bind");
1189         goto fail;
1190     }
1191
1192     /* Add host to multicast group */
1193     imr.imr_multiaddr = mcastaddr->sin_addr;
1194     imr.imr_interface.s_addr = htonl(INADDR_ANY);
1195
1196     ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1197                      (const char *)&imr, sizeof(struct ip_mreq));
1198     if (ret < 0) {
1199         perror("setsockopt(IP_ADD_MEMBERSHIP)");
1200         goto fail;
1201     }
1202
1203     /* Force mcast msgs to loopback (eg. several QEMUs in same host */
1204     val = 1;
1205     ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1206                    (const char *)&val, sizeof(val));
1207     if (ret < 0) {
1208         perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
1209         goto fail;
1210     }
1211
1212     socket_set_nonblock(fd);
1213     return fd;
1214 fail:
1215     if (fd >= 0)
1216         closesocket(fd);
1217     return -1;
1218 }
1219
1220 static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
1221                                                 const char *model,
1222                                                 const char *name,
1223                                                 int fd, int is_connected)
1224 {
1225     struct sockaddr_in saddr;
1226     int newfd;
1227     socklen_t saddr_len;
1228     NetSocketState *s;
1229
1230     /* fd passed: multicast: "learn" dgram_dst address from bound address and save it
1231      * Because this may be "shared" socket from a "master" process, datagrams would be recv()
1232      * by ONLY ONE process: we must "clone" this dgram socket --jjo
1233      */
1234
1235     if (is_connected) {
1236         if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
1237             /* must be bound */
1238             if (saddr.sin_addr.s_addr==0) {
1239                 fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, cannot setup multicast dst addr\n",
1240                         fd);
1241                 return NULL;
1242             }
1243             /* clone dgram socket */
1244             newfd = net_socket_mcast_create(&saddr);
1245             if (newfd < 0) {
1246                 /* error already reported by net_socket_mcast_create() */
1247                 close(fd);
1248                 return NULL;
1249             }
1250             /* clone newfd to fd, close newfd */
1251             dup2(newfd, fd);
1252             close(newfd);
1253
1254         } else {
1255             fprintf(stderr, "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
1256                     fd, strerror(errno));
1257             return NULL;
1258         }
1259     }
1260
1261     s = qemu_mallocz(sizeof(NetSocketState));
1262     if (!s)
1263         return NULL;
1264     s->fd = fd;
1265
1266     s->vc = qemu_new_vlan_client(vlan, model, name, net_socket_receive_dgram, NULL, s);
1267     qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s);
1268
1269     /* mcast: save bound address as dst */
1270     if (is_connected) s->dgram_dst=saddr;
1271
1272     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1273             "socket: fd=%d (%s mcast=%s:%d)",
1274             fd, is_connected? "cloned" : "",
1275             inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1276     return s;
1277 }
1278
1279 static void net_socket_connect(void *opaque)
1280 {
1281     NetSocketState *s = opaque;
1282     qemu_set_fd_handler(s->fd, net_socket_send, NULL, s);
1283 }
1284
1285 static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
1286                                                  const char *model,
1287                                                  const char *name,
1288                                                  int fd, int is_connected)
1289 {
1290     NetSocketState *s;
1291     s = qemu_mallocz(sizeof(NetSocketState));
1292     if (!s)
1293         return NULL;
1294     s->fd = fd;
1295     s->vc = qemu_new_vlan_client(vlan, model, name,
1296                                  net_socket_receive, NULL, s);
1297     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1298              "socket: fd=%d", fd);
1299     if (is_connected) {
1300         net_socket_connect(s);
1301     } else {
1302         qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
1303     }
1304     return s;
1305 }
1306
1307 static NetSocketState *net_socket_fd_init(VLANState *vlan,
1308                                           const char *model, const char *name,
1309                                           int fd, int is_connected)
1310 {
1311     int so_type=-1, optlen=sizeof(so_type);
1312
1313     if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type,
1314         (socklen_t *)&optlen)< 0) {
1315         fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n", fd);
1316         return NULL;
1317     }
1318     switch(so_type) {
1319     case SOCK_DGRAM:
1320         return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected);
1321     case SOCK_STREAM:
1322         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1323     default:
1324         /* who knows ... this could be a eg. a pty, do warn and continue as stream */
1325         fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
1326         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1327     }
1328     return NULL;
1329 }
1330
1331 static void net_socket_accept(void *opaque)
1332 {
1333     NetSocketListenState *s = opaque;
1334     NetSocketState *s1;
1335     struct sockaddr_in saddr;
1336     socklen_t len;
1337     int fd;
1338
1339     for(;;) {
1340         len = sizeof(saddr);
1341         fd = accept(s->fd, (struct sockaddr *)&saddr, &len);
1342         if (fd < 0 && errno != EINTR) {
1343             return;
1344         } else if (fd >= 0) {
1345             break;
1346         }
1347     }
1348     s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1);
1349     if (!s1) {
1350         closesocket(fd);
1351     } else {
1352         snprintf(s1->vc->info_str, sizeof(s1->vc->info_str),
1353                  "socket: connection from %s:%d",
1354                  inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1355     }
1356 }
1357
1358 static int net_socket_listen_init(VLANState *vlan,
1359                                   const char *model,
1360                                   const char *name,
1361                                   const char *host_str)
1362 {
1363     NetSocketListenState *s;
1364     int fd, val, ret;
1365     struct sockaddr_in saddr;
1366
1367     if (parse_host_port(&saddr, host_str) < 0)
1368         return -1;
1369
1370     s = qemu_mallocz(sizeof(NetSocketListenState));
1371     if (!s)
1372         return -1;
1373
1374     fd = socket(PF_INET, SOCK_STREAM, 0);
1375     if (fd < 0) {
1376         perror("socket");
1377         return -1;
1378     }
1379     socket_set_nonblock(fd);
1380
1381     /* allow fast reuse */
1382     val = 1;
1383     setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));
1384
1385     ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
1386     if (ret < 0) {
1387         perror("bind");
1388         return -1;
1389     }
1390     ret = listen(fd, 0);
1391     if (ret < 0) {
1392         perror("listen");
1393         return -1;
1394     }
1395     s->vlan = vlan;
1396     s->model = strdup(model);
1397     s->name = strdup(name);
1398     s->fd = fd;
1399     qemu_set_fd_handler(fd, net_socket_accept, NULL, s);
1400     return 0;
1401 }
1402
1403 static int net_socket_connect_init(VLANState *vlan,
1404                                    const char *model,
1405                                    const char *name,
1406                                    const char *host_str)
1407 {
1408     NetSocketState *s;
1409     int fd, connected, ret, err;
1410     struct sockaddr_in saddr;
1411
1412     if (parse_host_port(&saddr, host_str) < 0)
1413         return -1;
1414
1415     fd = socket(PF_INET, SOCK_STREAM, 0);
1416     if (fd < 0) {
1417         perror("socket");
1418         return -1;
1419     }
1420     socket_set_nonblock(fd);
1421
1422     connected = 0;
1423     for(;;) {
1424         ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
1425         if (ret < 0) {
1426             err = socket_error();
1427             if (err == EINTR || err == EWOULDBLOCK) {
1428             } else if (err == EINPROGRESS) {
1429                 break;
1430 #ifdef _WIN32
1431             } else if (err == WSAEALREADY) {
1432                 break;
1433 #endif
1434             } else {
1435                 perror("connect");
1436                 closesocket(fd);
1437                 return -1;
1438             }
1439         } else {
1440             connected = 1;
1441             break;
1442         }
1443     }
1444     s = net_socket_fd_init(vlan, model, name, fd, connected);
1445     if (!s)
1446         return -1;
1447     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1448              "socket: connect to %s:%d",
1449              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1450     return 0;
1451 }
1452
1453 static int net_socket_mcast_init(VLANState *vlan,
1454                                  const char *model,
1455                                  const char *name,
1456                                  const char *host_str)
1457 {
1458     NetSocketState *s;
1459     int fd;
1460     struct sockaddr_in saddr;
1461
1462     if (parse_host_port(&saddr, host_str) < 0)
1463         return -1;
1464
1465
1466     fd = net_socket_mcast_create(&saddr);
1467     if (fd < 0)
1468         return -1;
1469
1470     s = net_socket_fd_init(vlan, model, name, fd, 0);
1471     if (!s)
1472         return -1;
1473
1474     s->dgram_dst = saddr;
1475
1476     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1477              "socket: mcast=%s:%d",
1478              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1479     return 0;
1480
1481 }
1482
1483 /* find or alloc a new VLAN */
1484 VLANState *qemu_find_vlan(int id)
1485 {
1486     VLANState **pvlan, *vlan;
1487     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1488         if (vlan->id == id)
1489             return vlan;
1490     }
1491     vlan = qemu_mallocz(sizeof(VLANState));
1492     if (!vlan)
1493         return NULL;
1494     vlan->id = id;
1495     vlan->next = NULL;
1496     pvlan = &first_vlan;
1497     while (*pvlan != NULL)
1498         pvlan = &(*pvlan)->next;
1499     *pvlan = vlan;
1500     return vlan;
1501 }
1502
1503 void qemu_check_nic_model(NICInfo *nd, const char *model)
1504 {
1505     const char *models[2];
1506
1507     models[0] = model;
1508     models[1] = NULL;
1509
1510     qemu_check_nic_model_list(nd, models, model);
1511 }
1512
1513 void qemu_check_nic_model_list(NICInfo *nd, const char * const *models,
1514                                const char *default_model)
1515 {
1516     int i, exit_status = 0;
1517
1518     if (!nd->model)
1519         nd->model = strdup(default_model);
1520
1521     if (strcmp(nd->model, "?") != 0) {
1522         for (i = 0 ; models[i]; i++)
1523             if (strcmp(nd->model, models[i]) == 0)
1524                 return;
1525
1526         fprintf(stderr, "qemu: Unsupported NIC model: %s\n", nd->model);
1527         exit_status = 1;
1528     }
1529
1530     fprintf(stderr, "qemu: Supported NIC models: ");
1531     for (i = 0 ; models[i]; i++)
1532         fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
1533
1534     exit(exit_status);
1535 }
1536
1537 int net_client_init(const char *device, const char *p)
1538 {
1539     char buf[1024];
1540     int vlan_id, ret;
1541     VLANState *vlan;
1542     char *name = NULL;
1543
1544     vlan_id = 0;
1545     if (get_param_value(buf, sizeof(buf), "vlan", p)) {
1546         vlan_id = strtol(buf, NULL, 0);
1547     }
1548     vlan = qemu_find_vlan(vlan_id);
1549     if (!vlan) {
1550         fprintf(stderr, "Could not create vlan %d\n", vlan_id);
1551         return -1;
1552     }
1553     if (get_param_value(buf, sizeof(buf), "name", p)) {
1554         name = strdup(buf);
1555     }
1556     if (!strcmp(device, "nic")) {
1557         NICInfo *nd;
1558         uint8_t *macaddr;
1559
1560         if (nb_nics >= MAX_NICS) {
1561             fprintf(stderr, "Too Many NICs\n");
1562             return -1;
1563         }
1564         nd = &nd_table[nb_nics];
1565         macaddr = nd->macaddr;
1566         macaddr[0] = 0x52;
1567         macaddr[1] = 0x54;
1568         macaddr[2] = 0x00;
1569         macaddr[3] = 0x12;
1570         macaddr[4] = 0x34;
1571         macaddr[5] = 0x56 + nb_nics;
1572
1573         if (get_param_value(buf, sizeof(buf), "macaddr", p)) {
1574             if (parse_macaddr(macaddr, buf) < 0) {
1575                 fprintf(stderr, "invalid syntax for ethernet address\n");
1576                 return -1;
1577             }
1578         }
1579         if (get_param_value(buf, sizeof(buf), "model", p)) {
1580             nd->model = strdup(buf);
1581         }
1582         nd->vlan = vlan;
1583         nd->name = name;
1584         name = NULL;
1585         nb_nics++;
1586         vlan->nb_guest_devs++;
1587         ret = 0;
1588     } else
1589     if (!strcmp(device, "none")) {
1590         /* does nothing. It is needed to signal that no network cards
1591            are wanted */
1592         ret = 0;
1593     } else
1594 #ifdef CONFIG_SLIRP
1595     if (!strcmp(device, "user")) {
1596         if (get_param_value(buf, sizeof(buf), "hostname", p)) {
1597             pstrcpy(slirp_hostname, sizeof(slirp_hostname), buf);
1598         }
1599         if (get_param_value(buf, sizeof(buf), "restrict", p)) {
1600             slirp_restrict = (buf[0] == 'y') ? 1 : 0;
1601         }
1602         if (get_param_value(buf, sizeof(buf), "ip", p)) {
1603             slirp_ip = strdup(buf);
1604         }
1605         vlan->nb_host_devs++;
1606         ret = net_slirp_init(vlan, device, name);
1607     } else
1608 #endif
1609 #ifdef _WIN32
1610     if (!strcmp(device, "tap")) {
1611         char ifname[64];
1612         if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
1613             fprintf(stderr, "tap: no interface name\n");
1614             return -1;
1615         }
1616         vlan->nb_host_devs++;
1617         ret = tap_win32_init(vlan, device, name, ifname);
1618     } else
1619 #elif defined (_AIX)
1620 #else
1621     if (!strcmp(device, "tap")) {
1622         char ifname[64];
1623         char setup_script[1024], down_script[1024];
1624         int fd;
1625         vlan->nb_host_devs++;
1626         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
1627             fd = strtol(buf, NULL, 0);
1628             fcntl(fd, F_SETFL, O_NONBLOCK);
1629             ret = -1;
1630             if (net_tap_fd_init(vlan, device, name, fd))
1631                 ret = 0;
1632         } else {
1633             if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
1634                 ifname[0] = '\0';
1635             }
1636             if (get_param_value(setup_script, sizeof(setup_script), "script", p) == 0) {
1637                 pstrcpy(setup_script, sizeof(setup_script), DEFAULT_NETWORK_SCRIPT);
1638             }
1639             if (get_param_value(down_script, sizeof(down_script), "downscript", p) == 0) {
1640                 pstrcpy(down_script, sizeof(down_script), DEFAULT_NETWORK_DOWN_SCRIPT);
1641             }
1642             ret = net_tap_init(vlan, device, name, ifname, setup_script, down_script);
1643         }
1644     } else
1645 #endif
1646     if (!strcmp(device, "socket")) {
1647         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
1648             int fd;
1649             fd = strtol(buf, NULL, 0);
1650             ret = -1;
1651             if (net_socket_fd_init(vlan, device, name, fd, 1))
1652                 ret = 0;
1653         } else if (get_param_value(buf, sizeof(buf), "listen", p) > 0) {
1654             ret = net_socket_listen_init(vlan, device, name, buf);
1655         } else if (get_param_value(buf, sizeof(buf), "connect", p) > 0) {
1656             ret = net_socket_connect_init(vlan, device, name, buf);
1657         } else if (get_param_value(buf, sizeof(buf), "mcast", p) > 0) {
1658             ret = net_socket_mcast_init(vlan, device, name, buf);
1659         } else {
1660             fprintf(stderr, "Unknown socket options: %s\n", p);
1661             return -1;
1662         }
1663         vlan->nb_host_devs++;
1664     } else
1665 #ifdef CONFIG_VDE
1666     if (!strcmp(device, "vde")) {
1667         char vde_sock[1024], vde_group[512];
1668         int vde_port, vde_mode;
1669         vlan->nb_host_devs++;
1670         if (get_param_value(vde_sock, sizeof(vde_sock), "sock", p) <= 0) {
1671             vde_sock[0] = '\0';
1672         }
1673         if (get_param_value(buf, sizeof(buf), "port", p) > 0) {
1674             vde_port = strtol(buf, NULL, 10);
1675         } else {
1676             vde_port = 0;
1677         }
1678         if (get_param_value(vde_group, sizeof(vde_group), "group", p) <= 0) {
1679             vde_group[0] = '\0';
1680         }
1681         if (get_param_value(buf, sizeof(buf), "mode", p) > 0) {
1682             vde_mode = strtol(buf, NULL, 8);
1683         } else {
1684             vde_mode = 0700;
1685         }
1686         ret = net_vde_init(vlan, device, name, vde_sock, vde_port, vde_group, vde_mode);
1687     } else
1688 #endif
1689     {
1690         fprintf(stderr, "Unknown network device: %s\n", device);
1691         if (name)
1692             free(name);
1693         return -1;
1694     }
1695     if (ret < 0) {
1696         fprintf(stderr, "Could not initialize device '%s'\n", device);
1697     }
1698     if (name)
1699         free(name);
1700     return ret;
1701 }
1702
1703 int net_client_parse(const char *str)
1704 {
1705     const char *p;
1706     char *q;
1707     char device[64];
1708
1709     p = str;
1710     q = device;
1711     while (*p != '\0' && *p != ',') {
1712         if ((q - device) < sizeof(device) - 1)
1713             *q++ = *p;
1714         p++;
1715     }
1716     *q = '\0';
1717     if (*p == ',')
1718         p++;
1719
1720     return net_client_init(device, p);
1721 }
1722
1723 void do_info_network(void)
1724 {
1725     VLANState *vlan;
1726     VLANClientState *vc;
1727
1728     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1729         term_printf("VLAN %d devices:\n", vlan->id);
1730         for(vc = vlan->first_client; vc != NULL; vc = vc->next)
1731             term_printf("  %s: %s\n", vc->name, vc->info_str);
1732     }
1733 }
1734
1735 int do_set_link(const char *name, const char *up_or_down)
1736 {
1737     VLANState *vlan;
1738     VLANClientState *vc = NULL;
1739
1740     for (vlan = first_vlan; vlan != NULL; vlan = vlan->next)
1741         for (vc = vlan->first_client; vc != NULL; vc = vc->next)
1742             if (strcmp(vc->name, name) == 0)
1743                 goto done;
1744 done:
1745
1746     if (!vc) {
1747         term_printf("could not find network device '%s'", name);
1748         return 0;
1749     }
1750
1751     if (strcmp(up_or_down, "up") == 0)
1752         vc->link_down = 0;
1753     else if (strcmp(up_or_down, "down") == 0)
1754         vc->link_down = 1;
1755     else
1756         term_printf("invalid link status '%s'; only 'up' or 'down' valid\n",
1757                     up_or_down);
1758
1759     if (vc->link_status_changed)
1760         vc->link_status_changed(vc);
1761
1762     return 1;
1763 }
1764
1765 void net_cleanup(void)
1766 {
1767     VLANState *vlan;
1768
1769 #if !defined(_WIN32)
1770     /* close network clients */
1771     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1772         VLANClientState *vc;
1773
1774         for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
1775             if (vc->fd_read == tap_receive) {
1776                 TAPState *s = vc->opaque;
1777
1778                 if (s->down_script[0])
1779                     launch_script(s->down_script, s->down_script_arg, s->fd);
1780             }
1781 #if defined(CONFIG_VDE)
1782             if (vc->fd_read == vde_from_qemu) {
1783                 VDEState *s = vc->opaque;
1784                 vde_close(s->vde);
1785             }
1786 #endif
1787         }
1788     }
1789 #endif
1790 }
1791
1792 void net_client_check(void)
1793 {
1794     VLANState *vlan;
1795
1796     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1797         if (vlan->nb_guest_devs == 0 && vlan->nb_host_devs == 0)
1798             continue;
1799         if (vlan->nb_guest_devs == 0)
1800             fprintf(stderr, "Warning: vlan %d with no nics\n", vlan->id);
1801         if (vlan->nb_host_devs == 0)
1802             fprintf(stderr,
1803                     "Warning: vlan %d is not connected to host network\n",
1804                     vlan->id);
1805     }
1806 }