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                                       NetCleanup *cleanup,
 333                                       void *opaque)
 334 {
 335     VLANClientState *vc, **pvc;
 336     vc = qemu_mallocz(sizeof(VLANClientState));
 337     vc->model = strdup(model);
 338     if (name)
 339         vc->name = strdup(name);
 340     else
 341         vc->name = assign_name(vc, model);
 342     vc->fd_read = fd_read;
 343     vc->fd_can_read = fd_can_read;
 344     vc->cleanup = cleanup;
 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             if (vc->cleanup) {
 364                 vc->cleanup(vc);
 365             }
 366             free(vc->name);
 367             free(vc->model);
 368             qemu_free(vc);
 369             break;
 370         } else
 371             pvc = &(*pvc)->next;
 372 }
 373
 374 VLANClientState *qemu_find_vlan_client(VLANState *vlan, void *opaque)
 375 {
 376     VLANClientState **pvc = &vlan->first_client;
 377
 378     while (*pvc != NULL)
 379         if ((*pvc)->opaque == opaque)
 380             return *pvc;
 381         else
 382             pvc = &(*pvc)->next;
 383
 384     return NULL;
 385 }
 386
 387 int qemu_can_send_packet(VLANClientState *vc1)
 388 {
 389     VLANState *vlan = vc1->vlan;
 390     VLANClientState *vc;
 391
 392     for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
 393         if (vc != vc1) {
 394             if (vc->fd_can_read && vc->fd_can_read(vc->opaque))
 395                 return 1;
 396         }
 397     }
 398     return 0;
 399 }
 400
 401 void qemu_send_packet(VLANClientState *vc1, const uint8_t *buf, int size)
 402 {
 403     VLANState *vlan = vc1->vlan;
 404     VLANClientState *vc;
 405
 406     if (vc1->link_down)
 407         return;
 408
 409 #ifdef DEBUG_NET
 410     printf("vlan %d send:\n", vlan->id);
 411     hex_dump(stdout, buf, size);
 412 #endif
 413     for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
 414         if (vc != vc1 && !vc->link_down) {
 415             vc->fd_read(vc->opaque, buf, size);
 416         }
 417     }
 418 }
 419
 420 static ssize_t vc_sendv_compat(VLANClientState *vc, const struct iovec *iov,
 421                                int iovcnt)
 422 {
 423     uint8_t buffer[4096];
 424     size_t offset = 0;
 425     int i;
 426
 427     for (i = 0; i < iovcnt; i++) {
 428         size_t len;
 429
 430         len = MIN(sizeof(buffer) - offset, iov[i].iov_len);
 431         memcpy(buffer + offset, iov[i].iov_base, len);
 432         offset += len;
 433     }
 434
 435     vc->fd_read(vc->opaque, buffer, offset);
 436
 437     return offset;
 438 }
 439
 440 static ssize_t calc_iov_length(const struct iovec *iov, int iovcnt)
 441 {
 442     size_t offset = 0;
 443     int i;
 444
 445     for (i = 0; i < iovcnt; i++)
 446         offset += iov[i].iov_len;
 447     return offset;
 448 }
 449
 450 ssize_t qemu_sendv_packet(VLANClientState *vc1, const struct iovec *iov,
 451                           int iovcnt)
 452 {
 453     VLANState *vlan = vc1->vlan;
 454     VLANClientState *vc;
 455     ssize_t max_len = 0;
 456
 457     if (vc1->link_down)
 458         return calc_iov_length(iov, iovcnt);
 459
 460     for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
 461         ssize_t len = 0;
 462
 463         if (vc == vc1)
 464             continue;
 465
 466         if (vc->link_down)
 467             len = calc_iov_length(iov, iovcnt);
 468         if (vc->fd_readv)
 469             len = vc->fd_readv(vc->opaque, iov, iovcnt);
 470         else if (vc->fd_read)
 471             len = vc_sendv_compat(vc, iov, iovcnt);
 472
 473         max_len = MAX(max_len, len);
 474     }
 475
 476     return max_len;
 477 }
 478
 479 #if defined(CONFIG_SLIRP)
 480
 481 /* slirp network adapter */
 482
 483 static int slirp_inited;
 484 static int slirp_restrict;
 485 static char *slirp_ip;
 486 static VLANClientState *slirp_vc;
 487
 488 int slirp_can_output(void)
 489 {
 490     return !slirp_vc || qemu_can_send_packet(slirp_vc);
 491 }
 492
 493 void slirp_output(const uint8_t *pkt, int pkt_len)
 494 {
 495 #ifdef DEBUG_SLIRP
 496     printf("slirp output:\n");
 497     hex_dump(stdout, pkt, pkt_len);
 498 #endif
 499     if (!slirp_vc)
 500         return;
 501     qemu_send_packet(slirp_vc, pkt, pkt_len);
 502 }
 503
 504 int slirp_is_inited(void)
 505 {
 506     return slirp_inited;
 507 }
 508
 509 static void slirp_receive(void *opaque, const uint8_t *buf, int size)
 510 {
 511 #ifdef DEBUG_SLIRP
 512     printf("slirp input:\n");
 513     hex_dump(stdout, buf, size);
 514 #endif
 515     slirp_input(buf, size);
 516 }
 517
 518 static int net_slirp_init(VLANState *vlan, const char *model, const char *name)
 519 {
 520     if (!slirp_inited) {
 521         slirp_inited = 1;
 522         slirp_init(slirp_restrict, slirp_ip);
 523     }
 524     slirp_vc = qemu_new_vlan_client(vlan, model, name,
 525                                     slirp_receive, NULL, NULL, NULL);
 526     slirp_vc->info_str[0] = '\0';
 527     return 0;
 528 }
 529
 530 void net_slirp_redir(const char *redir_str)
 531 {
 532     int is_udp;
 533     char buf[256], *r;
 534     const char *p;
 535     struct in_addr guest_addr;
 536     int host_port, guest_port;
 537
 538     if (!slirp_inited) {
 539         slirp_inited = 1;
 540         slirp_init(slirp_restrict, slirp_ip);
 541     }
 542
 543     p = redir_str;
 544     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 545         goto fail;
 546     if (!strcmp(buf, "tcp")) {
 547         is_udp = 0;
 548     } else if (!strcmp(buf, "udp")) {
 549         is_udp = 1;
 550     } else {
 551         goto fail;
 552     }
 553
 554     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 555         goto fail;
 556     host_port = strtol(buf, &r, 0);
 557     if (r == buf)
 558         goto fail;
 559
 560     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 561         goto fail;
 562     if (buf[0] == '\0') {
 563         pstrcpy(buf, sizeof(buf), "10.0.2.15");
 564     }
 565     if (!inet_aton(buf, &guest_addr))
 566         goto fail;
 567
 568     guest_port = strtol(p, &r, 0);
 569     if (r == p)
 570         goto fail;
 571
 572     if (slirp_redir(is_udp, host_port, guest_addr, guest_port) < 0) {
 573         fprintf(stderr, "qemu: could not set up redirection\n");
 574         exit(1);
 575     }
 576     return;
 577  fail:
 578     fprintf(stderr, "qemu: syntax: -redir [tcp|udp]:host-port:[guest-host]:guest-port\n");
 579     exit(1);
 580 }
 581
 582 #ifndef _WIN32
 583
 584 static char smb_dir[1024];
 585
 586 static void erase_dir(char *dir_name)
 587 {
 588     DIR *d;
 589     struct dirent *de;
 590     char filename[1024];
 591
 592     /* erase all the files in the directory */
 593     if ((d = opendir(dir_name)) != 0) {
 594         for(;;) {
 595             de = readdir(d);
 596             if (!de)
 597                 break;
 598             if (strcmp(de->d_name, ".") != 0 &&
 599                 strcmp(de->d_name, "..") != 0) {
 600                 snprintf(filename, sizeof(filename), "%s/%s",
 601                          smb_dir, de->d_name);
 602                 if (unlink(filename) != 0)  /* is it a directory? */
 603                     erase_dir(filename);
 604             }
 605         }
 606         closedir(d);
 607         rmdir(dir_name);
 608     }
 609 }
 610
 611 /* automatic user mode samba server configuration */
 612 static void smb_exit(void)
 613 {
 614     erase_dir(smb_dir);
 615 }
 616
 617 /* automatic user mode samba server configuration */
 618 void net_slirp_smb(const char *exported_dir)
 619 {
 620     char smb_conf[1024];
 621     char smb_cmdline[1024];
 622     FILE *f;
 623
 624     if (!slirp_inited) {
 625         slirp_inited = 1;
 626         slirp_init(slirp_restrict, slirp_ip);
 627     }
 628
 629     /* XXX: better tmp dir construction */
 630     snprintf(smb_dir, sizeof(smb_dir), "/tmp/qemu-smb.%d", getpid());
 631     if (mkdir(smb_dir, 0700) < 0) {
 632         fprintf(stderr, "qemu: could not create samba server dir '%s'\n", smb_dir);
 633         exit(1);
 634     }
 635     snprintf(smb_conf, sizeof(smb_conf), "%s/%s", smb_dir, "smb.conf");
 636
 637     f = fopen(smb_conf, "w");
 638     if (!f) {
 639         fprintf(stderr, "qemu: could not create samba server configuration file '%s'\n", smb_conf);
 640         exit(1);
 641     }
 642     fprintf(f,
 643             "[global]\n"
 644             "private dir=%s\n"
 645             "smb ports=0\n"
 646             "socket address=127.0.0.1\n"
 647             "pid directory=%s\n"
 648             "lock directory=%s\n"
 649             "log file=%s/log.smbd\n"
 650             "smb passwd file=%s/smbpasswd\n"
 651             "security = share\n"
 652             "[qemu]\n"
 653             "path=%s\n"
 654             "read only=no\n"
 655             "guest ok=yes\n",
 656             smb_dir,
 657             smb_dir,
 658             smb_dir,
 659             smb_dir,
 660             smb_dir,
 661             exported_dir
 662             );
 663     fclose(f);
 664     atexit(smb_exit);
 665
 666     snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -s %s",
 667              SMBD_COMMAND, smb_conf);
 668
 669     slirp_add_exec(0, smb_cmdline, 4, 139);
 670 }
 671
 672 #endif /* !defined(_WIN32) */
 673 void do_info_slirp(void)
 674 {
 675     slirp_stats();
 676 }
 677
 678 struct VMChannel {
 679     CharDriverState *hd;
 680     int port;
 681 } *vmchannels;
 682
 683 static int vmchannel_can_read(void *opaque)
 684 {
 685     struct VMChannel *vmc = (struct VMChannel*)opaque;
 686     return slirp_socket_can_recv(4, vmc->port);
 687 }
 688
 689 static void vmchannel_read(void *opaque, const uint8_t *buf, int size)
 690 {
 691     struct VMChannel *vmc = (struct VMChannel*)opaque;
 692     slirp_socket_recv(4, vmc->port, buf, size);
 693 }
 694
 695 #endif /* CONFIG_SLIRP */
 696
 697 #if !defined(_WIN32)
 698
 699 typedef struct TAPState {
 700     VLANClientState *vc;
 701     int fd;
 702     char down_script[1024];
 703     char down_script_arg[128];
 704 } TAPState;
 705
 706 static int launch_script(const char *setup_script, const char *ifname, int fd);
 707
 708 static ssize_t tap_receive_iov(void *opaque, const struct iovec *iov,
 709                                int iovcnt)
 710 {
 711     TAPState *s = opaque;
 712     ssize_t len;
 713
 714     do {
 715         len = writev(s->fd, iov, iovcnt);
 716     } while (len == -1 && (errno == EINTR || errno == EAGAIN));
 717
 718     return len;
 719 }
 720
 721 static void tap_receive(void *opaque, const uint8_t *buf, int size)
 722 {
 723     TAPState *s = opaque;
 724     int ret;
 725     for(;;) {
 726         ret = write(s->fd, buf, size);
 727         if (ret < 0 && (errno == EINTR || errno == EAGAIN)) {
 728         } else {
 729             break;
 730         }
 731     }
 732 }
 733
 734 static void tap_send(void *opaque)
 735 {
 736     TAPState *s = opaque;
 737     uint8_t buf[4096];
 738     int size;
 739
 740 #ifdef __sun__
 741     struct strbuf sbuf;
 742     int f = 0;
 743     sbuf.maxlen = sizeof(buf);
 744     sbuf.buf = buf;
 745     size = getmsg(s->fd, NULL, &sbuf, &f) >=0 ? sbuf.len : -1;
 746 #else
 747     size = read(s->fd, buf, sizeof(buf));
 748 #endif
 749     if (size > 0) {
 750         qemu_send_packet(s->vc, buf, size);
 751     }
 752 }
 753
 754 static void tap_cleanup(VLANClientState *vc)
 755 {
 756     TAPState *s = vc->opaque;
 757
 758     if (s->down_script[0])
 759         launch_script(s->down_script, s->down_script_arg, s->fd);
 760
 761     qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
 762     close(s->fd);
 763     qemu_free(s);
 764 }
 765
 766 /* fd support */
 767
 768 static TAPState *net_tap_fd_init(VLANState *vlan,
 769                                  const char *model,
 770                                  const char *name,
 771                                  int fd)
 772 {
 773     TAPState *s;
 774
 775     s = qemu_mallocz(sizeof(TAPState));
 776     s->fd = fd;
 777     s->vc = qemu_new_vlan_client(vlan, model, name, tap_receive,
 778                                  NULL, tap_cleanup, s);
 779     s->vc->fd_readv = tap_receive_iov;
 780     qemu_set_fd_handler(s->fd, tap_send, NULL, s);
 781     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "fd=%d", fd);
 782     return s;
 783 }
 784
 785 #if defined (_BSD) || defined (__FreeBSD_kernel__)
 786 static int tap_open(char *ifname, int ifname_size)
 787 {
 788     int fd;
 789     char *dev;
 790     struct stat s;
 791
 792     TFR(fd = open("/dev/tap", O_RDWR));
 793     if (fd < 0) {
 794         fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n");
 795         return -1;
 796     }
 797
 798     fstat(fd, &s);
 799     dev = devname(s.st_rdev, S_IFCHR);
 800     pstrcpy(ifname, ifname_size, dev);
 801
 802     fcntl(fd, F_SETFL, O_NONBLOCK);
 803     return fd;
 804 }
 805 #elif defined(__sun__)
 806 #define TUNNEWPPA       (('T'<<16) | 0x0001)
 807 /*
 808  * Allocate TAP device, returns opened fd.
 809  * Stores dev name in the first arg(must be large enough).
 810  */
 811 int tap_alloc(char *dev, size_t dev_size)
 812 {
 813     int tap_fd, if_fd, ppa = -1;
 814     static int ip_fd = 0;
 815     char *ptr;
 816
 817     static int arp_fd = 0;
 818     int ip_muxid, arp_muxid;
 819     struct strioctl  strioc_if, strioc_ppa;
 820     int link_type = I_PLINK;;
 821     struct lifreq ifr;
 822     char actual_name[32] = "";
 823
 824     memset(&ifr, 0x0, sizeof(ifr));
 825
 826     if( *dev ){
 827        ptr = dev;
 828        while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
 829        ppa = atoi(ptr);
 830     }
 831
 832     /* Check if IP device was opened */
 833     if( ip_fd )
 834        close(ip_fd);
 835
 836     TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
 837     if (ip_fd < 0) {
 838        syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)");
 839        return -1;
 840     }
 841
 842     TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
 843     if (tap_fd < 0) {
 844        syslog(LOG_ERR, "Can't open /dev/tap");
 845        return -1;
 846     }
 847
 848     /* Assign a new PPA and get its unit number. */
 849     strioc_ppa.ic_cmd = TUNNEWPPA;
 850     strioc_ppa.ic_timout = 0;
 851     strioc_ppa.ic_len = sizeof(ppa);
 852     strioc_ppa.ic_dp = (char *)&ppa;
 853     if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
 854        syslog (LOG_ERR, "Can't assign new interface");
 855
 856     TFR(if_fd = open("/dev/tap", O_RDWR, 0));
 857     if (if_fd < 0) {
 858        syslog(LOG_ERR, "Can't open /dev/tap (2)");
 859        return -1;
 860     }
 861     if(ioctl(if_fd, I_PUSH, "ip") < 0){
 862        syslog(LOG_ERR, "Can't push IP module");
 863        return -1;
 864     }
 865
 866     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
 867         syslog(LOG_ERR, "Can't get flags\n");
 868
 869     snprintf (actual_name, 32, "tap%d", ppa);
 870     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
 871
 872     ifr.lifr_ppa = ppa;
 873     /* Assign ppa according to the unit number returned by tun device */
 874
 875     if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
 876         syslog (LOG_ERR, "Can't set PPA %d", ppa);
 877     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
 878         syslog (LOG_ERR, "Can't get flags\n");
 879     /* Push arp module to if_fd */
 880     if (ioctl (if_fd, I_PUSH, "arp") < 0)
 881         syslog (LOG_ERR, "Can't push ARP module (2)");
 882
 883     /* Push arp module to ip_fd */
 884     if (ioctl (ip_fd, I_POP, NULL) < 0)
 885         syslog (LOG_ERR, "I_POP failed\n");
 886     if (ioctl (ip_fd, I_PUSH, "arp") < 0)
 887         syslog (LOG_ERR, "Can't push ARP module (3)\n");
 888     /* Open arp_fd */
 889     TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
 890     if (arp_fd < 0)
 891        syslog (LOG_ERR, "Can't open %s\n", "/dev/tap");
 892
 893     /* Set ifname to arp */
 894     strioc_if.ic_cmd = SIOCSLIFNAME;
 895     strioc_if.ic_timout = 0;
 896     strioc_if.ic_len = sizeof(ifr);
 897     strioc_if.ic_dp = (char *)&ifr;
 898     if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
 899         syslog (LOG_ERR, "Can't set ifname to arp\n");
 900     }
 901
 902     if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
 903        syslog(LOG_ERR, "Can't link TAP device to IP");
 904        return -1;
 905     }
 906
 907     if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
 908         syslog (LOG_ERR, "Can't link TAP device to ARP");
 909
 910     close (if_fd);
 911
 912     memset(&ifr, 0x0, sizeof(ifr));
 913     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
 914     ifr.lifr_ip_muxid  = ip_muxid;
 915     ifr.lifr_arp_muxid = arp_muxid;
 916
 917     if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
 918     {
 919       ioctl (ip_fd, I_PUNLINK , arp_muxid);
 920       ioctl (ip_fd, I_PUNLINK, ip_muxid);
 921       syslog (LOG_ERR, "Can't set multiplexor id");
 922     }
 923
 924     snprintf(dev, dev_size, "tap%d", ppa);
 925     return tap_fd;
 926 }
 927
 928 static int tap_open(char *ifname, int ifname_size)
 929 {
 930     char  dev[10]="";
 931     int fd;
 932     if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){
 933        fprintf(stderr, "Cannot allocate TAP device\n");
 934        return -1;
 935     }
 936     pstrcpy(ifname, ifname_size, dev);
 937     fcntl(fd, F_SETFL, O_NONBLOCK);
 938     return fd;
 939 }
 940 #elif defined (_AIX)
 941 static int tap_open(char *ifname, int ifname_size)
 942 {
 943     fprintf (stderr, "no tap on AIX\n");
 944     return -1;
 945 }
 946 #else
 947 static int tap_open(char *ifname, int ifname_size)
 948 {
 949     struct ifreq ifr;
 950     int fd, ret;
 951
 952     TFR(fd = open("/dev/net/tun", O_RDWR));
 953     if (fd < 0) {
 954         fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n");
 955         return -1;
 956     }
 957     memset(&ifr, 0, sizeof(ifr));
 958     ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
 959     if (ifname[0] != '\0')
 960         pstrcpy(ifr.ifr_name, IFNAMSIZ, ifname);
 961     else
 962         pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d");
 963     ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
 964     if (ret != 0) {
 965         fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n");
 966         close(fd);
 967         return -1;
 968     }
 969     pstrcpy(ifname, ifname_size, ifr.ifr_name);
 970     fcntl(fd, F_SETFL, O_NONBLOCK);
 971     return fd;
 972 }
 973 #endif
 974
 975 static int launch_script(const char *setup_script, const char *ifname, int fd)
 976 {
 977     int pid, status;
 978     char *args[3];
 979     char **parg;
 980
 981         /* try to launch network script */
 982         pid = fork();
 983         if (pid >= 0) {
 984             if (pid == 0) {
 985                 int open_max = sysconf (_SC_OPEN_MAX), i;
 986                 for (i = 0; i < open_max; i++)
 987                     if (i != STDIN_FILENO &&
 988                         i != STDOUT_FILENO &&
 989                         i != STDERR_FILENO &&
 990                         i != fd)
 991                         close(i);
 992
 993                 parg = args;
 994                 *parg++ = (char *)setup_script;
 995                 *parg++ = (char *)ifname;
 996                 *parg++ = NULL;
 997                 execv(setup_script, args);
 998                 _exit(1);
 999             }
1000             while (waitpid(pid, &status, 0) != pid);
1001             if (!WIFEXITED(status) ||
1002                 WEXITSTATUS(status) != 0) {
1003                 fprintf(stderr, "%s: could not launch network script\n",
1004                         setup_script);
1005                 return -1;
1006             }
1007         }
1008     return 0;
1009 }
1010
1011 static int net_tap_init(VLANState *vlan, const char *model,
1012                         const char *name, const char *ifname1,
1013                         const char *setup_script, const char *down_script)
1014 {
1015     TAPState *s;
1016     int fd;
1017     char ifname[128];
1018
1019     if (ifname1 != NULL)
1020         pstrcpy(ifname, sizeof(ifname), ifname1);
1021     else
1022         ifname[0] = '\0';
1023     TFR(fd = tap_open(ifname, sizeof(ifname)));
1024     if (fd < 0)
1025         return -1;
1026
1027     if (!setup_script || !strcmp(setup_script, "no"))
1028         setup_script = "";
1029     if (setup_script[0] != '\0') {
1030         if (launch_script(setup_script, ifname, fd))
1031             return -1;
1032     }
1033     s = net_tap_fd_init(vlan, model, name, fd);
1034     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1035              "ifname=%s,script=%s,downscript=%s",
1036              ifname, setup_script, down_script);
1037     if (down_script && strcmp(down_script, "no")) {
1038         snprintf(s->down_script, sizeof(s->down_script), "%s", down_script);
1039         snprintf(s->down_script_arg, sizeof(s->down_script_arg), "%s", ifname);
1040     }
1041     return 0;
1042 }
1043
1044 #endif /* !_WIN32 */
1045
1046 #if defined(CONFIG_VDE)
1047 typedef struct VDEState {
1048     VLANClientState *vc;
1049     VDECONN *vde;
1050 } VDEState;
1051
1052 static void vde_to_qemu(void *opaque)
1053 {
1054     VDEState *s = opaque;
1055     uint8_t buf[4096];
1056     int size;
1057
1058     size = vde_recv(s->vde, buf, sizeof(buf), 0);
1059     if (size > 0) {
1060         qemu_send_packet(s->vc, buf, size);
1061     }
1062 }
1063
1064 static void vde_from_qemu(void *opaque, const uint8_t *buf, int size)
1065 {
1066     VDEState *s = opaque;
1067     int ret;
1068     for(;;) {
1069         ret = vde_send(s->vde, buf, size, 0);
1070         if (ret < 0 && errno == EINTR) {
1071         } else {
1072             break;
1073         }
1074     }
1075 }
1076
1077 static void vde_cleanup(VLANClientState *vc)
1078 {
1079     VDEState *s = vc->opaque;
1080     qemu_set_fd_handler(vde_datafd(s->vde), NULL, NULL, NULL);
1081     vde_close(s->vde);
1082     qemu_free(s);
1083 }
1084
1085 static int net_vde_init(VLANState *vlan, const char *model,
1086                         const char *name, const char *sock,
1087                         int port, const char *group, int mode)
1088 {
1089     VDEState *s;
1090     char *init_group = strlen(group) ? (char *)group : NULL;
1091     char *init_sock = strlen(sock) ? (char *)sock : NULL;
1092
1093     struct vde_open_args args = {
1094         .port = port,
1095         .group = init_group,
1096         .mode = mode,
1097     };
1098
1099     s = qemu_mallocz(sizeof(VDEState));
1100     s->vde = vde_open(init_sock, "QEMU", &args);
1101     if (!s->vde){
1102         free(s);
1103         return -1;
1104     }
1105     s->vc = qemu_new_vlan_client(vlan, model, name, vde_from_qemu,
1106                                  NULL, vde_cleanup, s);
1107     qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
1108     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "sock=%s,fd=%d",
1109              sock, vde_datafd(s->vde));
1110     return 0;
1111 }
1112 #endif
1113
1114 /* network connection */
1115 typedef struct NetSocketState {
1116     VLANClientState *vc;
1117     int fd;
1118     int state; /* 0 = getting length, 1 = getting data */
1119     unsigned int index;
1120     unsigned int packet_len;
1121     uint8_t buf[4096];
1122     struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
1123 } NetSocketState;
1124
1125 typedef struct NetSocketListenState {
1126     VLANState *vlan;
1127     char *model;
1128     char *name;
1129     int fd;
1130 } NetSocketListenState;
1131
1132 /* XXX: we consider we can send the whole packet without blocking */
1133 static void net_socket_receive(void *opaque, const uint8_t *buf, int size)
1134 {
1135     NetSocketState *s = opaque;
1136     uint32_t len;
1137     len = htonl(size);
1138
1139     send_all(s->fd, (const uint8_t *)&len, sizeof(len));
1140     send_all(s->fd, buf, size);
1141 }
1142
1143 static void net_socket_receive_dgram(void *opaque, const uint8_t *buf, int size)
1144 {
1145     NetSocketState *s = opaque;
1146     sendto(s->fd, buf, size, 0,
1147            (struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst));
1148 }
1149
1150 static void net_socket_send(void *opaque)
1151 {
1152     NetSocketState *s = opaque;
1153     int size, err;
1154     unsigned l;
1155     uint8_t buf1[4096];
1156     const uint8_t *buf;
1157
1158     size = recv(s->fd, buf1, sizeof(buf1), 0);
1159     if (size < 0) {
1160         err = socket_error();
1161         if (err != EWOULDBLOCK)
1162             goto eoc;
1163     } else if (size == 0) {
1164         /* end of connection */
1165     eoc:
1166         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1167         closesocket(s->fd);
1168         return;
1169     }
1170     buf = buf1;
1171     while (size > 0) {
1172         /* reassemble a packet from the network */
1173         switch(s->state) {
1174         case 0:
1175             l = 4 - s->index;
1176             if (l > size)
1177                 l = size;
1178             memcpy(s->buf + s->index, buf, l);
1179             buf += l;
1180             size -= l;
1181             s->index += l;
1182             if (s->index == 4) {
1183                 /* got length */
1184                 s->packet_len = ntohl(*(uint32_t *)s->buf);
1185                 s->index = 0;
1186                 s->state = 1;
1187             }
1188             break;
1189         case 1:
1190             l = s->packet_len - s->index;
1191             if (l > size)
1192                 l = size;
1193             if (s->index + l <= sizeof(s->buf)) {
1194                 memcpy(s->buf + s->index, buf, l);
1195             } else {
1196                 fprintf(stderr, "serious error: oversized packet received,"
1197                     "connection terminated.\n");
1198                 s->state = 0;
1199                 goto eoc;
1200             }
1201
1202             s->index += l;
1203             buf += l;
1204             size -= l;
1205             if (s->index >= s->packet_len) {
1206                 qemu_send_packet(s->vc, s->buf, s->packet_len);
1207                 s->index = 0;
1208                 s->state = 0;
1209             }
1210             break;
1211         }
1212     }
1213 }
1214
1215 static void net_socket_send_dgram(void *opaque)
1216 {
1217     NetSocketState *s = opaque;
1218     int size;
1219
1220     size = recv(s->fd, s->buf, sizeof(s->buf), 0);
1221     if (size < 0)
1222         return;
1223     if (size == 0) {
1224         /* end of connection */
1225         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1226         return;
1227     }
1228     qemu_send_packet(s->vc, s->buf, size);
1229 }
1230
1231 static int net_socket_mcast_create(struct sockaddr_in *mcastaddr)
1232 {
1233     struct ip_mreq imr;
1234     int fd;
1235     int val, ret;
1236     if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
1237         fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n",
1238                 inet_ntoa(mcastaddr->sin_addr),
1239                 (int)ntohl(mcastaddr->sin_addr.s_addr));
1240         return -1;
1241
1242     }
1243     fd = socket(PF_INET, SOCK_DGRAM, 0);
1244     if (fd < 0) {
1245         perror("socket(PF_INET, SOCK_DGRAM)");
1246         return -1;
1247     }
1248
1249     val = 1;
1250     ret=setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
1251                    (const char *)&val, sizeof(val));
1252     if (ret < 0) {
1253         perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
1254         goto fail;
1255     }
1256
1257     ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
1258     if (ret < 0) {
1259         perror("bind");
1260         goto fail;
1261     }
1262
1263     /* Add host to multicast group */
1264     imr.imr_multiaddr = mcastaddr->sin_addr;
1265     imr.imr_interface.s_addr = htonl(INADDR_ANY);
1266
1267     ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1268                      (const char *)&imr, sizeof(struct ip_mreq));
1269     if (ret < 0) {
1270         perror("setsockopt(IP_ADD_MEMBERSHIP)");
1271         goto fail;
1272     }
1273
1274     /* Force mcast msgs to loopback (eg. several QEMUs in same host */
1275     val = 1;
1276     ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1277                    (const char *)&val, sizeof(val));
1278     if (ret < 0) {
1279         perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
1280         goto fail;
1281     }
1282
1283     socket_set_nonblock(fd);
1284     return fd;
1285 fail:
1286     if (fd >= 0)
1287         closesocket(fd);
1288     return -1;
1289 }
1290
1291 static void net_socket_cleanup(VLANClientState *vc)
1292 {
1293     NetSocketState *s = vc->opaque;
1294     qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1295     close(s->fd);
1296     qemu_free(s);
1297 }
1298
1299 static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
1300                                                 const char *model,
1301                                                 const char *name,
1302                                                 int fd, int is_connected)
1303 {
1304     struct sockaddr_in saddr;
1305     int newfd;
1306     socklen_t saddr_len;
1307     NetSocketState *s;
1308
1309     /* fd passed: multicast: "learn" dgram_dst address from bound address and save it
1310      * Because this may be "shared" socket from a "master" process, datagrams would be recv()
1311      * by ONLY ONE process: we must "clone" this dgram socket --jjo
1312      */
1313
1314     if (is_connected) {
1315         if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
1316             /* must be bound */
1317             if (saddr.sin_addr.s_addr==0) {
1318                 fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, cannot setup multicast dst addr\n",
1319                         fd);
1320                 return NULL;
1321             }
1322             /* clone dgram socket */
1323             newfd = net_socket_mcast_create(&saddr);
1324             if (newfd < 0) {
1325                 /* error already reported by net_socket_mcast_create() */
1326                 close(fd);
1327                 return NULL;
1328             }
1329             /* clone newfd to fd, close newfd */
1330             dup2(newfd, fd);
1331             close(newfd);
1332
1333         } else {
1334             fprintf(stderr, "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
1335                     fd, strerror(errno));
1336             return NULL;
1337         }
1338     }
1339
1340     s = qemu_mallocz(sizeof(NetSocketState));
1341     s->fd = fd;
1342
1343     s->vc = qemu_new_vlan_client(vlan, model, name, net_socket_receive_dgram,
1344                                  NULL, net_socket_cleanup, s);
1345     qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s);
1346
1347     /* mcast: save bound address as dst */
1348     if (is_connected) s->dgram_dst=saddr;
1349
1350     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1351             "socket: fd=%d (%s mcast=%s:%d)",
1352             fd, is_connected? "cloned" : "",
1353             inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1354     return s;
1355 }
1356
1357 static void net_socket_connect(void *opaque)
1358 {
1359     NetSocketState *s = opaque;
1360     qemu_set_fd_handler(s->fd, net_socket_send, NULL, s);
1361 }
1362
1363 static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
1364                                                  const char *model,
1365                                                  const char *name,
1366                                                  int fd, int is_connected)
1367 {
1368     NetSocketState *s;
1369     s = qemu_mallocz(sizeof(NetSocketState));
1370     s->fd = fd;
1371     s->vc = qemu_new_vlan_client(vlan, model, name, net_socket_receive,
1372                                  NULL, net_socket_cleanup, s);
1373     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1374              "socket: fd=%d", fd);
1375     if (is_connected) {
1376         net_socket_connect(s);
1377     } else {
1378         qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
1379     }
1380     return s;
1381 }
1382
1383 static NetSocketState *net_socket_fd_init(VLANState *vlan,
1384                                           const char *model, const char *name,
1385                                           int fd, int is_connected)
1386 {
1387     int so_type=-1, optlen=sizeof(so_type);
1388
1389     if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type,
1390         (socklen_t *)&optlen)< 0) {
1391         fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n", fd);
1392         return NULL;
1393     }
1394     switch(so_type) {
1395     case SOCK_DGRAM:
1396         return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected);
1397     case SOCK_STREAM:
1398         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1399     default:
1400         /* who knows ... this could be a eg. a pty, do warn and continue as stream */
1401         fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
1402         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1403     }
1404     return NULL;
1405 }
1406
1407 static void net_socket_accept(void *opaque)
1408 {
1409     NetSocketListenState *s = opaque;
1410     NetSocketState *s1;
1411     struct sockaddr_in saddr;
1412     socklen_t len;
1413     int fd;
1414
1415     for(;;) {
1416         len = sizeof(saddr);
1417         fd = accept(s->fd, (struct sockaddr *)&saddr, &len);
1418         if (fd < 0 && errno != EINTR) {
1419             return;
1420         } else if (fd >= 0) {
1421             break;
1422         }
1423     }
1424     s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1);
1425     if (!s1) {
1426         closesocket(fd);
1427     } else {
1428         snprintf(s1->vc->info_str, sizeof(s1->vc->info_str),
1429                  "socket: connection from %s:%d",
1430                  inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1431     }
1432 }
1433
1434 static int net_socket_listen_init(VLANState *vlan,
1435                                   const char *model,
1436                                   const char *name,
1437                                   const char *host_str)
1438 {
1439     NetSocketListenState *s;
1440     int fd, val, ret;
1441     struct sockaddr_in saddr;
1442
1443     if (parse_host_port(&saddr, host_str) < 0)
1444         return -1;
1445
1446     s = qemu_mallocz(sizeof(NetSocketListenState));
1447
1448     fd = socket(PF_INET, SOCK_STREAM, 0);
1449     if (fd < 0) {
1450         perror("socket");
1451         return -1;
1452     }
1453     socket_set_nonblock(fd);
1454
1455     /* allow fast reuse */
1456     val = 1;
1457     setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));
1458
1459     ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
1460     if (ret < 0) {
1461         perror("bind");
1462         return -1;
1463     }
1464     ret = listen(fd, 0);
1465     if (ret < 0) {
1466         perror("listen");
1467         return -1;
1468     }
1469     s->vlan = vlan;
1470     s->model = strdup(model);
1471     s->name = name ? strdup(name) : NULL;
1472     s->fd = fd;
1473     qemu_set_fd_handler(fd, net_socket_accept, NULL, s);
1474     return 0;
1475 }
1476
1477 static int net_socket_connect_init(VLANState *vlan,
1478                                    const char *model,
1479                                    const char *name,
1480                                    const char *host_str)
1481 {
1482     NetSocketState *s;
1483     int fd, connected, ret, err;
1484     struct sockaddr_in saddr;
1485
1486     if (parse_host_port(&saddr, host_str) < 0)
1487         return -1;
1488
1489     fd = socket(PF_INET, SOCK_STREAM, 0);
1490     if (fd < 0) {
1491         perror("socket");
1492         return -1;
1493     }
1494     socket_set_nonblock(fd);
1495
1496     connected = 0;
1497     for(;;) {
1498         ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
1499         if (ret < 0) {
1500             err = socket_error();
1501             if (err == EINTR || err == EWOULDBLOCK) {
1502             } else if (err == EINPROGRESS) {
1503                 break;
1504 #ifdef _WIN32
1505             } else if (err == WSAEALREADY) {
1506                 break;
1507 #endif
1508             } else {
1509                 perror("connect");
1510                 closesocket(fd);
1511                 return -1;
1512             }
1513         } else {
1514             connected = 1;
1515             break;
1516         }
1517     }
1518     s = net_socket_fd_init(vlan, model, name, fd, connected);
1519     if (!s)
1520         return -1;
1521     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1522              "socket: connect to %s:%d",
1523              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1524     return 0;
1525 }
1526
1527 static int net_socket_mcast_init(VLANState *vlan,
1528                                  const char *model,
1529                                  const char *name,
1530                                  const char *host_str)
1531 {
1532     NetSocketState *s;
1533     int fd;
1534     struct sockaddr_in saddr;
1535
1536     if (parse_host_port(&saddr, host_str) < 0)
1537         return -1;
1538
1539
1540     fd = net_socket_mcast_create(&saddr);
1541     if (fd < 0)
1542         return -1;
1543
1544     s = net_socket_fd_init(vlan, model, name, fd, 0);
1545     if (!s)
1546         return -1;
1547
1548     s->dgram_dst = saddr;
1549
1550     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1551              "socket: mcast=%s:%d",
1552              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1553     return 0;
1554
1555 }
1556
1557 /* find or alloc a new VLAN */
1558 VLANState *qemu_find_vlan(int id)
1559 {
1560     VLANState **pvlan, *vlan;
1561     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1562         if (vlan->id == id)
1563             return vlan;
1564     }
1565     vlan = qemu_mallocz(sizeof(VLANState));
1566     vlan->id = id;
1567     vlan->next = NULL;
1568     pvlan = &first_vlan;
1569     while (*pvlan != NULL)
1570         pvlan = &(*pvlan)->next;
1571     *pvlan = vlan;
1572     return vlan;
1573 }
1574
1575 static int nic_get_free_idx(void)
1576 {
1577     int index;
1578
1579     for (index = 0; index < MAX_NICS; index++)
1580         if (!nd_table[index].used)
1581             return index;
1582     return -1;
1583 }
1584
1585 void qemu_check_nic_model(NICInfo *nd, const char *model)
1586 {
1587     const char *models[2];
1588
1589     models[0] = model;
1590     models[1] = NULL;
1591
1592     qemu_check_nic_model_list(nd, models, model);
1593 }
1594
1595 void qemu_check_nic_model_list(NICInfo *nd, const char * const *models,
1596                                const char *default_model)
1597 {
1598     int i, exit_status = 0;
1599
1600     if (!nd->model)
1601         nd->model = strdup(default_model);
1602
1603     if (strcmp(nd->model, "?") != 0) {
1604         for (i = 0 ; models[i]; i++)
1605             if (strcmp(nd->model, models[i]) == 0)
1606                 return;
1607
1608         fprintf(stderr, "qemu: Unsupported NIC model: %s\n", nd->model);
1609         exit_status = 1;
1610     }
1611
1612     fprintf(stderr, "qemu: Supported NIC models: ");
1613     for (i = 0 ; models[i]; i++)
1614         fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
1615
1616     exit(exit_status);
1617 }
1618
1619 int net_client_init(const char *device, const char *p)
1620 {
1621     char buf[1024];
1622     int vlan_id, ret;
1623     VLANState *vlan;
1624     char *name = NULL;
1625
1626     vlan_id = 0;
1627     if (get_param_value(buf, sizeof(buf), "vlan", p)) {
1628         vlan_id = strtol(buf, NULL, 0);
1629     }
1630     vlan = qemu_find_vlan(vlan_id);
1631
1632     if (get_param_value(buf, sizeof(buf), "name", p)) {
1633         name = strdup(buf);
1634     }
1635     if (!strcmp(device, "nic")) {
1636         NICInfo *nd;
1637         uint8_t *macaddr;
1638         int idx = nic_get_free_idx();
1639
1640         if (idx == -1 || nb_nics >= MAX_NICS) {
1641             fprintf(stderr, "Too Many NICs\n");
1642             ret = -1;
1643             goto out;
1644         }
1645         nd = &nd_table[idx];
1646         macaddr = nd->macaddr;
1647         macaddr[0] = 0x52;
1648         macaddr[1] = 0x54;
1649         macaddr[2] = 0x00;
1650         macaddr[3] = 0x12;
1651         macaddr[4] = 0x34;
1652         macaddr[5] = 0x56 + idx;
1653
1654         if (get_param_value(buf, sizeof(buf), "macaddr", p)) {
1655             if (parse_macaddr(macaddr, buf) < 0) {
1656                 fprintf(stderr, "invalid syntax for ethernet address\n");
1657                 ret = -1;
1658                 goto out;
1659             }
1660         }
1661         if (get_param_value(buf, sizeof(buf), "model", p)) {
1662             nd->model = strdup(buf);
1663         }
1664         nd->vlan = vlan;
1665         nd->name = name;
1666         nd->used = 1;
1667         name = NULL;
1668         nb_nics++;
1669         vlan->nb_guest_devs++;
1670         ret = idx;
1671     } else
1672     if (!strcmp(device, "none")) {
1673         /* does nothing. It is needed to signal that no network cards
1674            are wanted */
1675         ret = 0;
1676     } else
1677 #ifdef CONFIG_SLIRP
1678     if (!strcmp(device, "user")) {
1679         if (get_param_value(buf, sizeof(buf), "hostname", p)) {
1680             pstrcpy(slirp_hostname, sizeof(slirp_hostname), buf);
1681         }
1682         if (get_param_value(buf, sizeof(buf), "restrict", p)) {
1683             slirp_restrict = (buf[0] == 'y') ? 1 : 0;
1684         }
1685         if (get_param_value(buf, sizeof(buf), "ip", p)) {
1686             slirp_ip = strdup(buf);
1687         }
1688         vlan->nb_host_devs++;
1689         ret = net_slirp_init(vlan, device, name);
1690     } else if (!strcmp(device, "channel")) {
1691         long port;
1692         char name[20], *devname;
1693         struct VMChannel *vmc;
1694
1695         port = strtol(p, &devname, 10);
1696         devname++;
1697         if (port < 1 || port > 65535) {
1698             fprintf(stderr, "vmchannel wrong port number\n");
1699             ret = -1;
1700             goto out;
1701         }
1702         vmc = malloc(sizeof(struct VMChannel));
1703         snprintf(name, 20, "vmchannel%ld", port);
1704         vmc->hd = qemu_chr_open(name, devname, NULL);
1705         if (!vmc->hd) {
1706             fprintf(stderr, "qemu: could not open vmchannel device"
1707                     "'%s'\n", devname);
1708             ret = -1;
1709             goto out;
1710         }
1711         vmc->port = port;
1712         slirp_add_exec(3, vmc->hd, 4, port);
1713         qemu_chr_add_handlers(vmc->hd, vmchannel_can_read, vmchannel_read,
1714                 NULL, vmc);
1715         ret = 0;
1716     } else
1717 #endif
1718 #ifdef _WIN32
1719     if (!strcmp(device, "tap")) {
1720         char ifname[64];
1721         if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
1722             fprintf(stderr, "tap: no interface name\n");
1723             ret = -1;
1724             goto out;
1725         }
1726         vlan->nb_host_devs++;
1727         ret = tap_win32_init(vlan, device, name, ifname);
1728     } else
1729 #elif defined (_AIX)
1730 #else
1731     if (!strcmp(device, "tap")) {
1732         char ifname[64];
1733         char setup_script[1024], down_script[1024];
1734         int fd;
1735         vlan->nb_host_devs++;
1736         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
1737             fd = strtol(buf, NULL, 0);
1738             fcntl(fd, F_SETFL, O_NONBLOCK);
1739             net_tap_fd_init(vlan, device, name, fd);
1740             ret = 0;
1741         } else {
1742             if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
1743                 ifname[0] = '\0';
1744             }
1745             if (get_param_value(setup_script, sizeof(setup_script), "script", p) == 0) {
1746                 pstrcpy(setup_script, sizeof(setup_script), DEFAULT_NETWORK_SCRIPT);
1747             }
1748             if (get_param_value(down_script, sizeof(down_script), "downscript", p) == 0) {
1749                 pstrcpy(down_script, sizeof(down_script), DEFAULT_NETWORK_DOWN_SCRIPT);
1750             }
1751             ret = net_tap_init(vlan, device, name, ifname, setup_script, down_script);
1752         }
1753     } else
1754 #endif
1755     if (!strcmp(device, "socket")) {
1756         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
1757             int fd;
1758             fd = strtol(buf, NULL, 0);
1759             ret = -1;
1760             if (net_socket_fd_init(vlan, device, name, fd, 1))
1761                 ret = 0;
1762         } else if (get_param_value(buf, sizeof(buf), "listen", p) > 0) {
1763             ret = net_socket_listen_init(vlan, device, name, buf);
1764         } else if (get_param_value(buf, sizeof(buf), "connect", p) > 0) {
1765             ret = net_socket_connect_init(vlan, device, name, buf);
1766         } else if (get_param_value(buf, sizeof(buf), "mcast", p) > 0) {
1767             ret = net_socket_mcast_init(vlan, device, name, buf);
1768         } else {
1769             fprintf(stderr, "Unknown socket options: %s\n", p);
1770             ret = -1;
1771             goto out;
1772         }
1773         vlan->nb_host_devs++;
1774     } else
1775 #ifdef CONFIG_VDE
1776     if (!strcmp(device, "vde")) {
1777         char vde_sock[1024], vde_group[512];
1778         int vde_port, vde_mode;
1779         vlan->nb_host_devs++;
1780         if (get_param_value(vde_sock, sizeof(vde_sock), "sock", p) <= 0) {
1781             vde_sock[0] = '\0';
1782         }
1783         if (get_param_value(buf, sizeof(buf), "port", p) > 0) {
1784             vde_port = strtol(buf, NULL, 10);
1785         } else {
1786             vde_port = 0;
1787         }
1788         if (get_param_value(vde_group, sizeof(vde_group), "group", p) <= 0) {
1789             vde_group[0] = '\0';
1790         }
1791         if (get_param_value(buf, sizeof(buf), "mode", p) > 0) {
1792             vde_mode = strtol(buf, NULL, 8);
1793         } else {
1794             vde_mode = 0700;
1795         }
1796         ret = net_vde_init(vlan, device, name, vde_sock, vde_port, vde_group, vde_mode);
1797     } else
1798 #endif
1799     {
1800         fprintf(stderr, "Unknown network device: %s\n", device);
1801         ret = -1;
1802         goto out;
1803     }
1804     if (ret < 0) {
1805         fprintf(stderr, "Could not initialize device '%s'\n", device);
1806     }
1807 out:
1808     if (name)
1809         free(name);
1810     return ret;
1811 }
1812
1813 void net_client_uninit(NICInfo *nd)
1814 {
1815     nd->vlan->nb_guest_devs--;
1816     nb_nics--;
1817     nd->used = 0;
1818     free((void *)nd->model);
1819 }
1820
1821 static int net_host_check_device(const char *device)
1822 {
1823     int i;
1824     const char *valid_param_list[] = { "tap", "socket"
1825 #ifdef CONFIG_SLIRP
1826                                        ,"user"
1827 #endif
1828 #ifdef CONFIG_VDE
1829                                        ,"vde"
1830 #endif
1831     };
1832     for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) {
1833         if (!strncmp(valid_param_list[i], device,
1834                      strlen(valid_param_list[i])))
1835             return 1;
1836     }
1837
1838     return 0;
1839 }
1840
1841 void net_host_device_add(const char *device, const char *opts)
1842 {
1843     if (!net_host_check_device(device)) {
1844         term_printf("invalid host network device %s\n", device);
1845         return;
1846     }
1847     net_client_init(device, opts);
1848 }
1849
1850 void net_host_device_remove(int vlan_id, const char *device)
1851 {
1852     VLANState *vlan;
1853     VLANClientState *vc;
1854
1855     vlan = qemu_find_vlan(vlan_id);
1856
1857    for(vc = vlan->first_client; vc != NULL; vc = vc->next)
1858         if (!strcmp(vc->name, device))
1859             break;
1860
1861     if (!vc) {
1862         term_printf("can't find device %s\n", device);
1863         return;
1864     }
1865     qemu_del_vlan_client(vc);
1866 }
1867
1868 int net_client_parse(const char *str)
1869 {
1870     const char *p;
1871     char *q;
1872     char device[64];
1873
1874     p = str;
1875     q = device;
1876     while (*p != '\0' && *p != ',') {
1877         if ((q - device) < sizeof(device) - 1)
1878             *q++ = *p;
1879         p++;
1880     }
1881     *q = '\0';
1882     if (*p == ',')
1883         p++;
1884
1885     return net_client_init(device, p);
1886 }
1887
1888 void do_info_network(void)
1889 {
1890     VLANState *vlan;
1891     VLANClientState *vc;
1892
1893     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1894         term_printf("VLAN %d devices:\n", vlan->id);
1895         for(vc = vlan->first_client; vc != NULL; vc = vc->next)
1896             term_printf("  %s: %s\n", vc->name, vc->info_str);
1897     }
1898 }
1899
1900 int do_set_link(const char *name, const char *up_or_down)
1901 {
1902     VLANState *vlan;
1903     VLANClientState *vc = NULL;
1904
1905     for (vlan = first_vlan; vlan != NULL; vlan = vlan->next)
1906         for (vc = vlan->first_client; vc != NULL; vc = vc->next)
1907             if (strcmp(vc->name, name) == 0)
1908                 goto done;
1909 done:
1910
1911     if (!vc) {
1912         term_printf("could not find network device '%s'", name);
1913         return 0;
1914     }
1915
1916     if (strcmp(up_or_down, "up") == 0)
1917         vc->link_down = 0;
1918     else if (strcmp(up_or_down, "down") == 0)
1919         vc->link_down = 1;
1920     else
1921         term_printf("invalid link status '%s'; only 'up' or 'down' valid\n",
1922                     up_or_down);
1923
1924     if (vc->link_status_changed)
1925         vc->link_status_changed(vc);
1926
1927     return 1;
1928 }
1929
1930 void net_cleanup(void)
1931 {
1932     VLANState *vlan;
1933
1934     /* close network clients */
1935     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1936         VLANClientState *vc = vlan->first_client;
1937
1938         while (vc) {
1939             VLANClientState *next = vc->next;
1940
1941             qemu_del_vlan_client(vc);
1942
1943             vc = next;
1944         }
1945     }
1946 }
1947
1948 void net_client_check(void)
1949 {
1950     VLANState *vlan;
1951
1952     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1953         if (vlan->nb_guest_devs == 0 && vlan->nb_host_devs == 0)
1954             continue;
1955         if (vlan->nb_guest_devs == 0)
1956             fprintf(stderr, "Warning: vlan %d with no nics\n", vlan->id);
1957         if (vlan->nb_host_devs == 0)
1958             fprintf(stderr,
1959                     "Warning: vlan %d is not connected to host network\n",
1960                     vlan->id);
1961     }
1962 }