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     vc->model = strdup(model);
 337     if (name)
 338         vc->name = strdup(name);
 339     else
 340         vc->name = assign_name(vc, model);
 341     vc->fd_read = fd_read;
 342     vc->fd_can_read = fd_can_read;
 343     vc->opaque = opaque;
 344     vc->vlan = vlan;
 345
 346     vc->next = NULL;
 347     pvc = &vlan->first_client;
 348     while (*pvc != NULL)
 349         pvc = &(*pvc)->next;
 350     *pvc = vc;
 351     return vc;
 352 }
 353
 354 void qemu_del_vlan_client(VLANClientState *vc)
 355 {
 356     VLANClientState **pvc = &vc->vlan->first_client;
 357
 358     while (*pvc != NULL)
 359         if (*pvc == vc) {
 360             *pvc = vc->next;
 361             free(vc->name);
 362             free(vc->model);
 363             free(vc);
 364             break;
 365         } else
 366             pvc = &(*pvc)->next;
 367 }
 368
 369 VLANClientState *qemu_find_vlan_client(VLANState *vlan, void *opaque)
 370 {
 371     VLANClientState **pvc = &vlan->first_client;
 372
 373     while (*pvc != NULL)
 374         if ((*pvc)->opaque == opaque)
 375             return *pvc;
 376         else
 377             pvc = &(*pvc)->next;
 378
 379     return NULL;
 380 }
 381
 382 int qemu_can_send_packet(VLANClientState *vc1)
 383 {
 384     VLANState *vlan = vc1->vlan;
 385     VLANClientState *vc;
 386
 387     for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
 388         if (vc != vc1) {
 389             if (vc->fd_can_read && vc->fd_can_read(vc->opaque))
 390                 return 1;
 391         }
 392     }
 393     return 0;
 394 }
 395
 396 void qemu_send_packet(VLANClientState *vc1, const uint8_t *buf, int size)
 397 {
 398     VLANState *vlan = vc1->vlan;
 399     VLANClientState *vc;
 400
 401     if (vc1->link_down)
 402         return;
 403
 404 #ifdef DEBUG_NET
 405     printf("vlan %d send:\n", vlan->id);
 406     hex_dump(stdout, buf, size);
 407 #endif
 408     for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
 409         if (vc != vc1 && !vc->link_down) {
 410             vc->fd_read(vc->opaque, buf, size);
 411         }
 412     }
 413 }
 414
 415 static ssize_t vc_sendv_compat(VLANClientState *vc, const struct iovec *iov,
 416                                int iovcnt)
 417 {
 418     uint8_t buffer[4096];
 419     size_t offset = 0;
 420     int i;
 421
 422     for (i = 0; i < iovcnt; i++) {
 423         size_t len;
 424
 425         len = MIN(sizeof(buffer) - offset, iov[i].iov_len);
 426         memcpy(buffer + offset, iov[i].iov_base, len);
 427         offset += len;
 428     }
 429
 430     vc->fd_read(vc->opaque, buffer, offset);
 431
 432     return offset;
 433 }
 434
 435 static ssize_t calc_iov_length(const struct iovec *iov, int iovcnt)
 436 {
 437     size_t offset = 0;
 438     int i;
 439
 440     for (i = 0; i < iovcnt; i++)
 441         offset += iov[i].iov_len;
 442     return offset;
 443 }
 444
 445 ssize_t qemu_sendv_packet(VLANClientState *vc1, const struct iovec *iov,
 446                           int iovcnt)
 447 {
 448     VLANState *vlan = vc1->vlan;
 449     VLANClientState *vc;
 450     ssize_t max_len = 0;
 451
 452     if (vc1->link_down)
 453         return calc_iov_length(iov, iovcnt);
 454
 455     for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
 456         ssize_t len = 0;
 457
 458         if (vc == vc1)
 459             continue;
 460
 461         if (vc->link_down)
 462             len = calc_iov_length(iov, iovcnt);
 463         if (vc->fd_readv)
 464             len = vc->fd_readv(vc->opaque, iov, iovcnt);
 465         else if (vc->fd_read)
 466             len = vc_sendv_compat(vc, iov, iovcnt);
 467
 468         max_len = MAX(max_len, len);
 469     }
 470
 471     return max_len;
 472 }
 473
 474 #if defined(CONFIG_SLIRP)
 475
 476 /* slirp network adapter */
 477
 478 static int slirp_inited;
 479 static int slirp_restrict;
 480 static char *slirp_ip;
 481 static VLANClientState *slirp_vc;
 482
 483 int slirp_can_output(void)
 484 {
 485     return !slirp_vc || qemu_can_send_packet(slirp_vc);
 486 }
 487
 488 void slirp_output(const uint8_t *pkt, int pkt_len)
 489 {
 490 #ifdef DEBUG_SLIRP
 491     printf("slirp output:\n");
 492     hex_dump(stdout, pkt, pkt_len);
 493 #endif
 494     if (!slirp_vc)
 495         return;
 496     qemu_send_packet(slirp_vc, pkt, pkt_len);
 497 }
 498
 499 int slirp_is_inited(void)
 500 {
 501     return slirp_inited;
 502 }
 503
 504 static void slirp_receive(void *opaque, const uint8_t *buf, int size)
 505 {
 506 #ifdef DEBUG_SLIRP
 507     printf("slirp input:\n");
 508     hex_dump(stdout, buf, size);
 509 #endif
 510     slirp_input(buf, size);
 511 }
 512
 513 static int net_slirp_init(VLANState *vlan, const char *model, const char *name)
 514 {
 515     if (!slirp_inited) {
 516         slirp_inited = 1;
 517         slirp_init(slirp_restrict, slirp_ip);
 518     }
 519     slirp_vc = qemu_new_vlan_client(vlan, model, name,
 520                                     slirp_receive, NULL, NULL);
 521     slirp_vc->info_str[0] = '\0';
 522     return 0;
 523 }
 524
 525 void net_slirp_redir(const char *redir_str)
 526 {
 527     int is_udp;
 528     char buf[256], *r;
 529     const char *p;
 530     struct in_addr guest_addr;
 531     int host_port, guest_port;
 532
 533     if (!slirp_inited) {
 534         slirp_inited = 1;
 535         slirp_init(slirp_restrict, slirp_ip);
 536     }
 537
 538     p = redir_str;
 539     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 540         goto fail;
 541     if (!strcmp(buf, "tcp")) {
 542         is_udp = 0;
 543     } else if (!strcmp(buf, "udp")) {
 544         is_udp = 1;
 545     } else {
 546         goto fail;
 547     }
 548
 549     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 550         goto fail;
 551     host_port = strtol(buf, &r, 0);
 552     if (r == buf)
 553         goto fail;
 554
 555     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 556         goto fail;
 557     if (buf[0] == '\0') {
 558         pstrcpy(buf, sizeof(buf), "10.0.2.15");
 559     }
 560     if (!inet_aton(buf, &guest_addr))
 561         goto fail;
 562
 563     guest_port = strtol(p, &r, 0);
 564     if (r == p)
 565         goto fail;
 566
 567     if (slirp_redir(is_udp, host_port, guest_addr, guest_port) < 0) {
 568         fprintf(stderr, "qemu: could not set up redirection\n");
 569         exit(1);
 570     }
 571     return;
 572  fail:
 573     fprintf(stderr, "qemu: syntax: -redir [tcp|udp]:host-port:[guest-host]:guest-port\n");
 574     exit(1);
 575 }
 576
 577 #ifndef _WIN32
 578
 579 static char smb_dir[1024];
 580
 581 static void erase_dir(char *dir_name)
 582 {
 583     DIR *d;
 584     struct dirent *de;
 585     char filename[1024];
 586
 587     /* erase all the files in the directory */
 588     if ((d = opendir(dir_name)) != 0) {
 589         for(;;) {
 590             de = readdir(d);
 591             if (!de)
 592                 break;
 593             if (strcmp(de->d_name, ".") != 0 &&
 594                 strcmp(de->d_name, "..") != 0) {
 595                 snprintf(filename, sizeof(filename), "%s/%s",
 596                          smb_dir, de->d_name);
 597                 if (unlink(filename) != 0)  /* is it a directory? */
 598                     erase_dir(filename);
 599             }
 600         }
 601         closedir(d);
 602         rmdir(dir_name);
 603     }
 604 }
 605
 606 /* automatic user mode samba server configuration */
 607 static void smb_exit(void)
 608 {
 609     erase_dir(smb_dir);
 610 }
 611
 612 /* automatic user mode samba server configuration */
 613 void net_slirp_smb(const char *exported_dir)
 614 {
 615     char smb_conf[1024];
 616     char smb_cmdline[1024];
 617     FILE *f;
 618
 619     if (!slirp_inited) {
 620         slirp_inited = 1;
 621         slirp_init(slirp_restrict, slirp_ip);
 622     }
 623
 624     /* XXX: better tmp dir construction */
 625     snprintf(smb_dir, sizeof(smb_dir), "/tmp/qemu-smb.%d", getpid());
 626     if (mkdir(smb_dir, 0700) < 0) {
 627         fprintf(stderr, "qemu: could not create samba server dir '%s'\n", smb_dir);
 628         exit(1);
 629     }
 630     snprintf(smb_conf, sizeof(smb_conf), "%s/%s", smb_dir, "smb.conf");
 631
 632     f = fopen(smb_conf, "w");
 633     if (!f) {
 634         fprintf(stderr, "qemu: could not create samba server configuration file '%s'\n", smb_conf);
 635         exit(1);
 636     }
 637     fprintf(f,
 638             "[global]\n"
 639             "private dir=%s\n"
 640             "smb ports=0\n"
 641             "socket address=127.0.0.1\n"
 642             "pid directory=%s\n"
 643             "lock directory=%s\n"
 644             "log file=%s/log.smbd\n"
 645             "smb passwd file=%s/smbpasswd\n"
 646             "security = share\n"
 647             "[qemu]\n"
 648             "path=%s\n"
 649             "read only=no\n"
 650             "guest ok=yes\n",
 651             smb_dir,
 652             smb_dir,
 653             smb_dir,
 654             smb_dir,
 655             smb_dir,
 656             exported_dir
 657             );
 658     fclose(f);
 659     atexit(smb_exit);
 660
 661     snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -s %s",
 662              SMBD_COMMAND, smb_conf);
 663
 664     slirp_add_exec(0, smb_cmdline, 4, 139);
 665 }
 666
 667 #endif /* !defined(_WIN32) */
 668 void do_info_slirp(void)
 669 {
 670     slirp_stats();
 671 }
 672
 673 struct VMChannel {
 674     CharDriverState *hd;
 675     int port;
 676 } *vmchannels;
 677
 678 static int vmchannel_can_read(void *opaque)
 679 {
 680     struct VMChannel *vmc = (struct VMChannel*)opaque;
 681     return slirp_socket_can_recv(4, vmc->port);
 682 }
 683
 684 static void vmchannel_read(void *opaque, const uint8_t *buf, int size)
 685 {
 686     struct VMChannel *vmc = (struct VMChannel*)opaque;
 687     slirp_socket_recv(4, vmc->port, buf, size);
 688 }
 689
 690 #endif /* CONFIG_SLIRP */
 691
 692 #if !defined(_WIN32)
 693
 694 typedef struct TAPState {
 695     VLANClientState *vc;
 696     int fd;
 697     char down_script[1024];
 698     char down_script_arg[128];
 699 } TAPState;
 700
 701 static ssize_t tap_receive_iov(void *opaque, const struct iovec *iov,
 702                                int iovcnt)
 703 {
 704     TAPState *s = opaque;
 705     ssize_t len;
 706
 707     do {
 708         len = writev(s->fd, iov, iovcnt);
 709     } while (len == -1 && (errno == EINTR || errno == EAGAIN));
 710
 711     return len;
 712 }
 713
 714 static void tap_receive(void *opaque, const uint8_t *buf, int size)
 715 {
 716     TAPState *s = opaque;
 717     int ret;
 718     for(;;) {
 719         ret = write(s->fd, buf, size);
 720         if (ret < 0 && (errno == EINTR || errno == EAGAIN)) {
 721         } else {
 722             break;
 723         }
 724     }
 725 }
 726
 727 static void tap_send(void *opaque)
 728 {
 729     TAPState *s = opaque;
 730     uint8_t buf[4096];
 731     int size;
 732
 733 #ifdef __sun__
 734     struct strbuf sbuf;
 735     int f = 0;
 736     sbuf.maxlen = sizeof(buf);
 737     sbuf.buf = buf;
 738     size = getmsg(s->fd, NULL, &sbuf, &f) >=0 ? sbuf.len : -1;
 739 #else
 740     size = read(s->fd, buf, sizeof(buf));
 741 #endif
 742     if (size > 0) {
 743         qemu_send_packet(s->vc, buf, size);
 744     }
 745 }
 746
 747 /* fd support */
 748
 749 static TAPState *net_tap_fd_init(VLANState *vlan,
 750                                  const char *model,
 751                                  const char *name,
 752                                  int fd)
 753 {
 754     TAPState *s;
 755
 756     s = qemu_mallocz(sizeof(TAPState));
 757     s->fd = fd;
 758     s->vc = qemu_new_vlan_client(vlan, model, name, tap_receive, NULL, s);
 759     s->vc->fd_readv = tap_receive_iov;
 760     qemu_set_fd_handler(s->fd, tap_send, NULL, s);
 761     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "fd=%d", fd);
 762     return s;
 763 }
 764
 765 #if defined (_BSD) || defined (__FreeBSD_kernel__)
 766 static int tap_open(char *ifname, int ifname_size)
 767 {
 768     int fd;
 769     char *dev;
 770     struct stat s;
 771
 772     TFR(fd = open("/dev/tap", O_RDWR));
 773     if (fd < 0) {
 774         fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n");
 775         return -1;
 776     }
 777
 778     fstat(fd, &s);
 779     dev = devname(s.st_rdev, S_IFCHR);
 780     pstrcpy(ifname, ifname_size, dev);
 781
 782     fcntl(fd, F_SETFL, O_NONBLOCK);
 783     return fd;
 784 }
 785 #elif defined(__sun__)
 786 #define TUNNEWPPA       (('T'<<16) | 0x0001)
 787 /*
 788  * Allocate TAP device, returns opened fd.
 789  * Stores dev name in the first arg(must be large enough).
 790  */
 791 int tap_alloc(char *dev, size_t dev_size)
 792 {
 793     int tap_fd, if_fd, ppa = -1;
 794     static int ip_fd = 0;
 795     char *ptr;
 796
 797     static int arp_fd = 0;
 798     int ip_muxid, arp_muxid;
 799     struct strioctl  strioc_if, strioc_ppa;
 800     int link_type = I_PLINK;;
 801     struct lifreq ifr;
 802     char actual_name[32] = "";
 803
 804     memset(&ifr, 0x0, sizeof(ifr));
 805
 806     if( *dev ){
 807        ptr = dev;
 808        while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
 809        ppa = atoi(ptr);
 810     }
 811
 812     /* Check if IP device was opened */
 813     if( ip_fd )
 814        close(ip_fd);
 815
 816     TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
 817     if (ip_fd < 0) {
 818        syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)");
 819        return -1;
 820     }
 821
 822     TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
 823     if (tap_fd < 0) {
 824        syslog(LOG_ERR, "Can't open /dev/tap");
 825        return -1;
 826     }
 827
 828     /* Assign a new PPA and get its unit number. */
 829     strioc_ppa.ic_cmd = TUNNEWPPA;
 830     strioc_ppa.ic_timout = 0;
 831     strioc_ppa.ic_len = sizeof(ppa);
 832     strioc_ppa.ic_dp = (char *)&ppa;
 833     if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
 834        syslog (LOG_ERR, "Can't assign new interface");
 835
 836     TFR(if_fd = open("/dev/tap", O_RDWR, 0));
 837     if (if_fd < 0) {
 838        syslog(LOG_ERR, "Can't open /dev/tap (2)");
 839        return -1;
 840     }
 841     if(ioctl(if_fd, I_PUSH, "ip") < 0){
 842        syslog(LOG_ERR, "Can't push IP module");
 843        return -1;
 844     }
 845
 846     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
 847         syslog(LOG_ERR, "Can't get flags\n");
 848
 849     snprintf (actual_name, 32, "tap%d", ppa);
 850     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
 851
 852     ifr.lifr_ppa = ppa;
 853     /* Assign ppa according to the unit number returned by tun device */
 854
 855     if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
 856         syslog (LOG_ERR, "Can't set PPA %d", ppa);
 857     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
 858         syslog (LOG_ERR, "Can't get flags\n");
 859     /* Push arp module to if_fd */
 860     if (ioctl (if_fd, I_PUSH, "arp") < 0)
 861         syslog (LOG_ERR, "Can't push ARP module (2)");
 862
 863     /* Push arp module to ip_fd */
 864     if (ioctl (ip_fd, I_POP, NULL) < 0)
 865         syslog (LOG_ERR, "I_POP failed\n");
 866     if (ioctl (ip_fd, I_PUSH, "arp") < 0)
 867         syslog (LOG_ERR, "Can't push ARP module (3)\n");
 868     /* Open arp_fd */
 869     TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
 870     if (arp_fd < 0)
 871        syslog (LOG_ERR, "Can't open %s\n", "/dev/tap");
 872
 873     /* Set ifname to arp */
 874     strioc_if.ic_cmd = SIOCSLIFNAME;
 875     strioc_if.ic_timout = 0;
 876     strioc_if.ic_len = sizeof(ifr);
 877     strioc_if.ic_dp = (char *)&ifr;
 878     if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
 879         syslog (LOG_ERR, "Can't set ifname to arp\n");
 880     }
 881
 882     if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
 883        syslog(LOG_ERR, "Can't link TAP device to IP");
 884        return -1;
 885     }
 886
 887     if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
 888         syslog (LOG_ERR, "Can't link TAP device to ARP");
 889
 890     close (if_fd);
 891
 892     memset(&ifr, 0x0, sizeof(ifr));
 893     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
 894     ifr.lifr_ip_muxid  = ip_muxid;
 895     ifr.lifr_arp_muxid = arp_muxid;
 896
 897     if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
 898     {
 899       ioctl (ip_fd, I_PUNLINK , arp_muxid);
 900       ioctl (ip_fd, I_PUNLINK, ip_muxid);
 901       syslog (LOG_ERR, "Can't set multiplexor id");
 902     }
 903
 904     snprintf(dev, dev_size, "tap%d", ppa);
 905     return tap_fd;
 906 }
 907
 908 static int tap_open(char *ifname, int ifname_size)
 909 {
 910     char  dev[10]="";
 911     int fd;
 912     if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){
 913        fprintf(stderr, "Cannot allocate TAP device\n");
 914        return -1;
 915     }
 916     pstrcpy(ifname, ifname_size, dev);
 917     fcntl(fd, F_SETFL, O_NONBLOCK);
 918     return fd;
 919 }
 920 #elif defined (_AIX)
 921 static int tap_open(char *ifname, int ifname_size)
 922 {
 923     fprintf (stderr, "no tap on AIX\n");
 924     return -1;
 925 }
 926 #else
 927 static int tap_open(char *ifname, int ifname_size)
 928 {
 929     struct ifreq ifr;
 930     int fd, ret;
 931
 932     TFR(fd = open("/dev/net/tun", O_RDWR));
 933     if (fd < 0) {
 934         fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n");
 935         return -1;
 936     }
 937     memset(&ifr, 0, sizeof(ifr));
 938     ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
 939     if (ifname[0] != '\0')
 940         pstrcpy(ifr.ifr_name, IFNAMSIZ, ifname);
 941     else
 942         pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d");
 943     ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
 944     if (ret != 0) {
 945         fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n");
 946         close(fd);
 947         return -1;
 948     }
 949     pstrcpy(ifname, ifname_size, ifr.ifr_name);
 950     fcntl(fd, F_SETFL, O_NONBLOCK);
 951     return fd;
 952 }
 953 #endif
 954
 955 static int launch_script(const char *setup_script, const char *ifname, int fd)
 956 {
 957     int pid, status;
 958     char *args[3];
 959     char **parg;
 960
 961         /* try to launch network script */
 962         pid = fork();
 963         if (pid >= 0) {
 964             if (pid == 0) {
 965                 int open_max = sysconf (_SC_OPEN_MAX), i;
 966                 for (i = 0; i < open_max; i++)
 967                     if (i != STDIN_FILENO &&
 968                         i != STDOUT_FILENO &&
 969                         i != STDERR_FILENO &&
 970                         i != fd)
 971                         close(i);
 972
 973                 parg = args;
 974                 *parg++ = (char *)setup_script;
 975                 *parg++ = (char *)ifname;
 976                 *parg++ = NULL;
 977                 execv(setup_script, args);
 978                 _exit(1);
 979             }
 980             while (waitpid(pid, &status, 0) != pid);
 981             if (!WIFEXITED(status) ||
 982                 WEXITSTATUS(status) != 0) {
 983                 fprintf(stderr, "%s: could not launch network script\n",
 984                         setup_script);
 985                 return -1;
 986             }
 987         }
 988     return 0;
 989 }
 990
 991 static int net_tap_init(VLANState *vlan, const char *model,
 992                         const char *name, const char *ifname1,
 993                         const char *setup_script, const char *down_script)
 994 {
 995     TAPState *s;
 996     int fd;
 997     char ifname[128];
 998
 999     if (ifname1 != NULL)
1000         pstrcpy(ifname, sizeof(ifname), ifname1);
1001     else
1002         ifname[0] = '\0';
1003     TFR(fd = tap_open(ifname, sizeof(ifname)));
1004     if (fd < 0)
1005         return -1;
1006
1007     if (!setup_script || !strcmp(setup_script, "no"))
1008         setup_script = "";
1009     if (setup_script[0] != '\0') {
1010         if (launch_script(setup_script, ifname, fd))
1011             return -1;
1012     }
1013     s = net_tap_fd_init(vlan, model, name, fd);
1014     if (!s)
1015         return -1;
1016     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1017              "ifname=%s,script=%s,downscript=%s",
1018              ifname, setup_script, down_script);
1019     if (down_script && strcmp(down_script, "no")) {
1020         snprintf(s->down_script, sizeof(s->down_script), "%s", down_script);
1021         snprintf(s->down_script_arg, sizeof(s->down_script_arg), "%s", ifname);
1022     }
1023     return 0;
1024 }
1025
1026 #endif /* !_WIN32 */
1027
1028 #if defined(CONFIG_VDE)
1029 typedef struct VDEState {
1030     VLANClientState *vc;
1031     VDECONN *vde;
1032 } VDEState;
1033
1034 static void vde_to_qemu(void *opaque)
1035 {
1036     VDEState *s = opaque;
1037     uint8_t buf[4096];
1038     int size;
1039
1040     size = vde_recv(s->vde, buf, sizeof(buf), 0);
1041     if (size > 0) {
1042         qemu_send_packet(s->vc, buf, size);
1043     }
1044 }
1045
1046 static void vde_from_qemu(void *opaque, const uint8_t *buf, int size)
1047 {
1048     VDEState *s = opaque;
1049     int ret;
1050     for(;;) {
1051         ret = vde_send(s->vde, buf, size, 0);
1052         if (ret < 0 && errno == EINTR) {
1053         } else {
1054             break;
1055         }
1056     }
1057 }
1058
1059 static int net_vde_init(VLANState *vlan, const char *model,
1060                         const char *name, const char *sock,
1061                         int port, const char *group, int mode)
1062 {
1063     VDEState *s;
1064     char *init_group = strlen(group) ? (char *)group : NULL;
1065     char *init_sock = strlen(sock) ? (char *)sock : NULL;
1066
1067     struct vde_open_args args = {
1068         .port = port,
1069         .group = init_group,
1070         .mode = mode,
1071     };
1072
1073     s = qemu_mallocz(sizeof(VDEState));
1074     s->vde = vde_open(init_sock, "QEMU", &args);
1075     if (!s->vde){
1076         free(s);
1077         return -1;
1078     }
1079     s->vc = qemu_new_vlan_client(vlan, model, name, vde_from_qemu, NULL, s);
1080     qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
1081     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "sock=%s,fd=%d",
1082              sock, vde_datafd(s->vde));
1083     return 0;
1084 }
1085 #endif
1086
1087 /* network connection */
1088 typedef struct NetSocketState {
1089     VLANClientState *vc;
1090     int fd;
1091     int state; /* 0 = getting length, 1 = getting data */
1092     unsigned int index;
1093     unsigned int packet_len;
1094     uint8_t buf[4096];
1095     struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
1096 } NetSocketState;
1097
1098 typedef struct NetSocketListenState {
1099     VLANState *vlan;
1100     char *model;
1101     char *name;
1102     int fd;
1103 } NetSocketListenState;
1104
1105 /* XXX: we consider we can send the whole packet without blocking */
1106 static void net_socket_receive(void *opaque, const uint8_t *buf, int size)
1107 {
1108     NetSocketState *s = opaque;
1109     uint32_t len;
1110     len = htonl(size);
1111
1112     send_all(s->fd, (const uint8_t *)&len, sizeof(len));
1113     send_all(s->fd, buf, size);
1114 }
1115
1116 static void net_socket_receive_dgram(void *opaque, const uint8_t *buf, int size)
1117 {
1118     NetSocketState *s = opaque;
1119     sendto(s->fd, buf, size, 0,
1120            (struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst));
1121 }
1122
1123 static void net_socket_send(void *opaque)
1124 {
1125     NetSocketState *s = opaque;
1126     int size, err;
1127     unsigned l;
1128     uint8_t buf1[4096];
1129     const uint8_t *buf;
1130
1131     size = recv(s->fd, buf1, sizeof(buf1), 0);
1132     if (size < 0) {
1133         err = socket_error();
1134         if (err != EWOULDBLOCK)
1135             goto eoc;
1136     } else if (size == 0) {
1137         /* end of connection */
1138     eoc:
1139         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1140         closesocket(s->fd);
1141         return;
1142     }
1143     buf = buf1;
1144     while (size > 0) {
1145         /* reassemble a packet from the network */
1146         switch(s->state) {
1147         case 0:
1148             l = 4 - s->index;
1149             if (l > size)
1150                 l = size;
1151             memcpy(s->buf + s->index, buf, l);
1152             buf += l;
1153             size -= l;
1154             s->index += l;
1155             if (s->index == 4) {
1156                 /* got length */
1157                 s->packet_len = ntohl(*(uint32_t *)s->buf);
1158                 s->index = 0;
1159                 s->state = 1;
1160             }
1161             break;
1162         case 1:
1163             l = s->packet_len - s->index;
1164             if (l > size)
1165                 l = size;
1166             if (s->index + l <= sizeof(s->buf)) {
1167                 memcpy(s->buf + s->index, buf, l);
1168             } else {
1169                 fprintf(stderr, "serious error: oversized packet received,"
1170                     "connection terminated.\n");
1171                 s->state = 0;
1172                 goto eoc;
1173             }
1174
1175             s->index += l;
1176             buf += l;
1177             size -= l;
1178             if (s->index >= s->packet_len) {
1179                 qemu_send_packet(s->vc, s->buf, s->packet_len);
1180                 s->index = 0;
1181                 s->state = 0;
1182             }
1183             break;
1184         }
1185     }
1186 }
1187
1188 static void net_socket_send_dgram(void *opaque)
1189 {
1190     NetSocketState *s = opaque;
1191     int size;
1192
1193     size = recv(s->fd, s->buf, sizeof(s->buf), 0);
1194     if (size < 0)
1195         return;
1196     if (size == 0) {
1197         /* end of connection */
1198         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1199         return;
1200     }
1201     qemu_send_packet(s->vc, s->buf, size);
1202 }
1203
1204 static int net_socket_mcast_create(struct sockaddr_in *mcastaddr)
1205 {
1206     struct ip_mreq imr;
1207     int fd;
1208     int val, ret;
1209     if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
1210         fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n",
1211                 inet_ntoa(mcastaddr->sin_addr),
1212                 (int)ntohl(mcastaddr->sin_addr.s_addr));
1213         return -1;
1214
1215     }
1216     fd = socket(PF_INET, SOCK_DGRAM, 0);
1217     if (fd < 0) {
1218         perror("socket(PF_INET, SOCK_DGRAM)");
1219         return -1;
1220     }
1221
1222     val = 1;
1223     ret=setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
1224                    (const char *)&val, sizeof(val));
1225     if (ret < 0) {
1226         perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
1227         goto fail;
1228     }
1229
1230     ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
1231     if (ret < 0) {
1232         perror("bind");
1233         goto fail;
1234     }
1235
1236     /* Add host to multicast group */
1237     imr.imr_multiaddr = mcastaddr->sin_addr;
1238     imr.imr_interface.s_addr = htonl(INADDR_ANY);
1239
1240     ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1241                      (const char *)&imr, sizeof(struct ip_mreq));
1242     if (ret < 0) {
1243         perror("setsockopt(IP_ADD_MEMBERSHIP)");
1244         goto fail;
1245     }
1246
1247     /* Force mcast msgs to loopback (eg. several QEMUs in same host */
1248     val = 1;
1249     ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1250                    (const char *)&val, sizeof(val));
1251     if (ret < 0) {
1252         perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
1253         goto fail;
1254     }
1255
1256     socket_set_nonblock(fd);
1257     return fd;
1258 fail:
1259     if (fd >= 0)
1260         closesocket(fd);
1261     return -1;
1262 }
1263
1264 static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
1265                                                 const char *model,
1266                                                 const char *name,
1267                                                 int fd, int is_connected)
1268 {
1269     struct sockaddr_in saddr;
1270     int newfd;
1271     socklen_t saddr_len;
1272     NetSocketState *s;
1273
1274     /* fd passed: multicast: "learn" dgram_dst address from bound address and save it
1275      * Because this may be "shared" socket from a "master" process, datagrams would be recv()
1276      * by ONLY ONE process: we must "clone" this dgram socket --jjo
1277      */
1278
1279     if (is_connected) {
1280         if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
1281             /* must be bound */
1282             if (saddr.sin_addr.s_addr==0) {
1283                 fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, cannot setup multicast dst addr\n",
1284                         fd);
1285                 return NULL;
1286             }
1287             /* clone dgram socket */
1288             newfd = net_socket_mcast_create(&saddr);
1289             if (newfd < 0) {
1290                 /* error already reported by net_socket_mcast_create() */
1291                 close(fd);
1292                 return NULL;
1293             }
1294             /* clone newfd to fd, close newfd */
1295             dup2(newfd, fd);
1296             close(newfd);
1297
1298         } else {
1299             fprintf(stderr, "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
1300                     fd, strerror(errno));
1301             return NULL;
1302         }
1303     }
1304
1305     s = qemu_mallocz(sizeof(NetSocketState));
1306     s->fd = fd;
1307
1308     s->vc = qemu_new_vlan_client(vlan, model, name, net_socket_receive_dgram, NULL, s);
1309     qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s);
1310
1311     /* mcast: save bound address as dst */
1312     if (is_connected) s->dgram_dst=saddr;
1313
1314     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1315             "socket: fd=%d (%s mcast=%s:%d)",
1316             fd, is_connected? "cloned" : "",
1317             inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1318     return s;
1319 }
1320
1321 static void net_socket_connect(void *opaque)
1322 {
1323     NetSocketState *s = opaque;
1324     qemu_set_fd_handler(s->fd, net_socket_send, NULL, s);
1325 }
1326
1327 static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
1328                                                  const char *model,
1329                                                  const char *name,
1330                                                  int fd, int is_connected)
1331 {
1332     NetSocketState *s;
1333     s = qemu_mallocz(sizeof(NetSocketState));
1334     s->fd = fd;
1335     s->vc = qemu_new_vlan_client(vlan, model, name,
1336                                  net_socket_receive, NULL, s);
1337     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1338              "socket: fd=%d", fd);
1339     if (is_connected) {
1340         net_socket_connect(s);
1341     } else {
1342         qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
1343     }
1344     return s;
1345 }
1346
1347 static NetSocketState *net_socket_fd_init(VLANState *vlan,
1348                                           const char *model, const char *name,
1349                                           int fd, int is_connected)
1350 {
1351     int so_type=-1, optlen=sizeof(so_type);
1352
1353     if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type,
1354         (socklen_t *)&optlen)< 0) {
1355         fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n", fd);
1356         return NULL;
1357     }
1358     switch(so_type) {
1359     case SOCK_DGRAM:
1360         return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected);
1361     case SOCK_STREAM:
1362         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1363     default:
1364         /* who knows ... this could be a eg. a pty, do warn and continue as stream */
1365         fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
1366         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1367     }
1368     return NULL;
1369 }
1370
1371 static void net_socket_accept(void *opaque)
1372 {
1373     NetSocketListenState *s = opaque;
1374     NetSocketState *s1;
1375     struct sockaddr_in saddr;
1376     socklen_t len;
1377     int fd;
1378
1379     for(;;) {
1380         len = sizeof(saddr);
1381         fd = accept(s->fd, (struct sockaddr *)&saddr, &len);
1382         if (fd < 0 && errno != EINTR) {
1383             return;
1384         } else if (fd >= 0) {
1385             break;
1386         }
1387     }
1388     s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1);
1389     if (!s1) {
1390         closesocket(fd);
1391     } else {
1392         snprintf(s1->vc->info_str, sizeof(s1->vc->info_str),
1393                  "socket: connection from %s:%d",
1394                  inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1395     }
1396 }
1397
1398 static int net_socket_listen_init(VLANState *vlan,
1399                                   const char *model,
1400                                   const char *name,
1401                                   const char *host_str)
1402 {
1403     NetSocketListenState *s;
1404     int fd, val, ret;
1405     struct sockaddr_in saddr;
1406
1407     if (parse_host_port(&saddr, host_str) < 0)
1408         return -1;
1409
1410     s = qemu_mallocz(sizeof(NetSocketListenState));
1411
1412     fd = socket(PF_INET, SOCK_STREAM, 0);
1413     if (fd < 0) {
1414         perror("socket");
1415         return -1;
1416     }
1417     socket_set_nonblock(fd);
1418
1419     /* allow fast reuse */
1420     val = 1;
1421     setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));
1422
1423     ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
1424     if (ret < 0) {
1425         perror("bind");
1426         return -1;
1427     }
1428     ret = listen(fd, 0);
1429     if (ret < 0) {
1430         perror("listen");
1431         return -1;
1432     }
1433     s->vlan = vlan;
1434     s->model = strdup(model);
1435     s->name = strdup(name);
1436     s->fd = fd;
1437     qemu_set_fd_handler(fd, net_socket_accept, NULL, s);
1438     return 0;
1439 }
1440
1441 static int net_socket_connect_init(VLANState *vlan,
1442                                    const char *model,
1443                                    const char *name,
1444                                    const char *host_str)
1445 {
1446     NetSocketState *s;
1447     int fd, connected, ret, err;
1448     struct sockaddr_in saddr;
1449
1450     if (parse_host_port(&saddr, host_str) < 0)
1451         return -1;
1452
1453     fd = socket(PF_INET, SOCK_STREAM, 0);
1454     if (fd < 0) {
1455         perror("socket");
1456         return -1;
1457     }
1458     socket_set_nonblock(fd);
1459
1460     connected = 0;
1461     for(;;) {
1462         ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
1463         if (ret < 0) {
1464             err = socket_error();
1465             if (err == EINTR || err == EWOULDBLOCK) {
1466             } else if (err == EINPROGRESS) {
1467                 break;
1468 #ifdef _WIN32
1469             } else if (err == WSAEALREADY) {
1470                 break;
1471 #endif
1472             } else {
1473                 perror("connect");
1474                 closesocket(fd);
1475                 return -1;
1476             }
1477         } else {
1478             connected = 1;
1479             break;
1480         }
1481     }
1482     s = net_socket_fd_init(vlan, model, name, fd, connected);
1483     if (!s)
1484         return -1;
1485     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1486              "socket: connect to %s:%d",
1487              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1488     return 0;
1489 }
1490
1491 static int net_socket_mcast_init(VLANState *vlan,
1492                                  const char *model,
1493                                  const char *name,
1494                                  const char *host_str)
1495 {
1496     NetSocketState *s;
1497     int fd;
1498     struct sockaddr_in saddr;
1499
1500     if (parse_host_port(&saddr, host_str) < 0)
1501         return -1;
1502
1503
1504     fd = net_socket_mcast_create(&saddr);
1505     if (fd < 0)
1506         return -1;
1507
1508     s = net_socket_fd_init(vlan, model, name, fd, 0);
1509     if (!s)
1510         return -1;
1511
1512     s->dgram_dst = saddr;
1513
1514     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1515              "socket: mcast=%s:%d",
1516              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1517     return 0;
1518
1519 }
1520
1521 /* find or alloc a new VLAN */
1522 VLANState *qemu_find_vlan(int id)
1523 {
1524     VLANState **pvlan, *vlan;
1525     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1526         if (vlan->id == id)
1527             return vlan;
1528     }
1529     vlan = qemu_mallocz(sizeof(VLANState));
1530     vlan->id = id;
1531     vlan->next = NULL;
1532     pvlan = &first_vlan;
1533     while (*pvlan != NULL)
1534         pvlan = &(*pvlan)->next;
1535     *pvlan = vlan;
1536     return vlan;
1537 }
1538
1539 static int nic_get_free_idx(void)
1540 {
1541     int index;
1542
1543     for (index = 0; index < MAX_NICS; index++)
1544         if (!nd_table[index].used)
1545             return index;
1546     return -1;
1547 }
1548
1549 void qemu_check_nic_model(NICInfo *nd, const char *model)
1550 {
1551     const char *models[2];
1552
1553     models[0] = model;
1554     models[1] = NULL;
1555
1556     qemu_check_nic_model_list(nd, models, model);
1557 }
1558
1559 void qemu_check_nic_model_list(NICInfo *nd, const char * const *models,
1560                                const char *default_model)
1561 {
1562     int i, exit_status = 0;
1563
1564     if (!nd->model)
1565         nd->model = strdup(default_model);
1566
1567     if (strcmp(nd->model, "?") != 0) {
1568         for (i = 0 ; models[i]; i++)
1569             if (strcmp(nd->model, models[i]) == 0)
1570                 return;
1571
1572         fprintf(stderr, "qemu: Unsupported NIC model: %s\n", nd->model);
1573         exit_status = 1;
1574     }
1575
1576     fprintf(stderr, "qemu: Supported NIC models: ");
1577     for (i = 0 ; models[i]; i++)
1578         fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
1579
1580     exit(exit_status);
1581 }
1582
1583 int net_client_init(const char *device, const char *p)
1584 {
1585     char buf[1024];
1586     int vlan_id, ret;
1587     VLANState *vlan;
1588     char *name = NULL;
1589
1590     vlan_id = 0;
1591     if (get_param_value(buf, sizeof(buf), "vlan", p)) {
1592         vlan_id = strtol(buf, NULL, 0);
1593     }
1594     vlan = qemu_find_vlan(vlan_id);
1595     if (!vlan) {
1596         fprintf(stderr, "Could not create vlan %d\n", vlan_id);
1597         return -1;
1598     }
1599     if (get_param_value(buf, sizeof(buf), "name", p)) {
1600         name = strdup(buf);
1601     }
1602     if (!strcmp(device, "nic")) {
1603         NICInfo *nd;
1604         uint8_t *macaddr;
1605         int idx = nic_get_free_idx();
1606
1607         if (idx == -1 || nb_nics >= MAX_NICS) {
1608             fprintf(stderr, "Too Many NICs\n");
1609             ret = -1;
1610             goto out;
1611         }
1612         nd = &nd_table[idx];
1613         macaddr = nd->macaddr;
1614         macaddr[0] = 0x52;
1615         macaddr[1] = 0x54;
1616         macaddr[2] = 0x00;
1617         macaddr[3] = 0x12;
1618         macaddr[4] = 0x34;
1619         macaddr[5] = 0x56 + idx;
1620
1621         if (get_param_value(buf, sizeof(buf), "macaddr", p)) {
1622             if (parse_macaddr(macaddr, buf) < 0) {
1623                 fprintf(stderr, "invalid syntax for ethernet address\n");
1624                 ret = -1;
1625                 goto out;
1626             }
1627         }
1628         if (get_param_value(buf, sizeof(buf), "model", p)) {
1629             nd->model = strdup(buf);
1630         }
1631         nd->vlan = vlan;
1632         nd->name = name;
1633         nd->used = 1;
1634         name = NULL;
1635         nb_nics++;
1636         vlan->nb_guest_devs++;
1637         ret = idx;
1638     } else
1639     if (!strcmp(device, "none")) {
1640         /* does nothing. It is needed to signal that no network cards
1641            are wanted */
1642         ret = 0;
1643     } else
1644 #ifdef CONFIG_SLIRP
1645     if (!strcmp(device, "user")) {
1646         if (get_param_value(buf, sizeof(buf), "hostname", p)) {
1647             pstrcpy(slirp_hostname, sizeof(slirp_hostname), buf);
1648         }
1649         if (get_param_value(buf, sizeof(buf), "restrict", p)) {
1650             slirp_restrict = (buf[0] == 'y') ? 1 : 0;
1651         }
1652         if (get_param_value(buf, sizeof(buf), "ip", p)) {
1653             slirp_ip = strdup(buf);
1654         }
1655         vlan->nb_host_devs++;
1656         ret = net_slirp_init(vlan, device, name);
1657     } else if (!strcmp(device, "channel")) {
1658         long port;
1659         char name[20], *devname;
1660         struct VMChannel *vmc;
1661
1662         port = strtol(p, &devname, 10);
1663         devname++;
1664         if (port < 1 || port > 65535) {
1665             fprintf(stderr, "vmchannel wrong port number\n");
1666             ret = -1;
1667             goto out;
1668         }
1669         vmc = malloc(sizeof(struct VMChannel));
1670         snprintf(name, 20, "vmchannel%ld", port);
1671         vmc->hd = qemu_chr_open(name, devname, NULL);
1672         if (!vmc->hd) {
1673             fprintf(stderr, "qemu: could not open vmchannel device"
1674                     "'%s'\n", devname);
1675             ret = -1;
1676             goto out;
1677         }
1678         vmc->port = port;
1679         slirp_add_exec(3, vmc->hd, 4, port);
1680         qemu_chr_add_handlers(vmc->hd, vmchannel_can_read, vmchannel_read,
1681                 NULL, vmc);
1682         ret = 0;
1683     } else
1684 #endif
1685 #ifdef _WIN32
1686     if (!strcmp(device, "tap")) {
1687         char ifname[64];
1688         if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
1689             fprintf(stderr, "tap: no interface name\n");
1690             ret = -1;
1691             goto out;
1692         }
1693         vlan->nb_host_devs++;
1694         ret = tap_win32_init(vlan, device, name, ifname);
1695     } else
1696 #elif defined (_AIX)
1697 #else
1698     if (!strcmp(device, "tap")) {
1699         char ifname[64];
1700         char setup_script[1024], down_script[1024];
1701         int fd;
1702         vlan->nb_host_devs++;
1703         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
1704             fd = strtol(buf, NULL, 0);
1705             fcntl(fd, F_SETFL, O_NONBLOCK);
1706             ret = -1;
1707             if (net_tap_fd_init(vlan, device, name, fd))
1708                 ret = 0;
1709         } else {
1710             if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
1711                 ifname[0] = '\0';
1712             }
1713             if (get_param_value(setup_script, sizeof(setup_script), "script", p) == 0) {
1714                 pstrcpy(setup_script, sizeof(setup_script), DEFAULT_NETWORK_SCRIPT);
1715             }
1716             if (get_param_value(down_script, sizeof(down_script), "downscript", p) == 0) {
1717                 pstrcpy(down_script, sizeof(down_script), DEFAULT_NETWORK_DOWN_SCRIPT);
1718             }
1719             ret = net_tap_init(vlan, device, name, ifname, setup_script, down_script);
1720         }
1721     } else
1722 #endif
1723     if (!strcmp(device, "socket")) {
1724         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
1725             int fd;
1726             fd = strtol(buf, NULL, 0);
1727             ret = -1;
1728             if (net_socket_fd_init(vlan, device, name, fd, 1))
1729                 ret = 0;
1730         } else if (get_param_value(buf, sizeof(buf), "listen", p) > 0) {
1731             ret = net_socket_listen_init(vlan, device, name, buf);
1732         } else if (get_param_value(buf, sizeof(buf), "connect", p) > 0) {
1733             ret = net_socket_connect_init(vlan, device, name, buf);
1734         } else if (get_param_value(buf, sizeof(buf), "mcast", p) > 0) {
1735             ret = net_socket_mcast_init(vlan, device, name, buf);
1736         } else {
1737             fprintf(stderr, "Unknown socket options: %s\n", p);
1738             ret = -1;
1739             goto out;
1740         }
1741         vlan->nb_host_devs++;
1742     } else
1743 #ifdef CONFIG_VDE
1744     if (!strcmp(device, "vde")) {
1745         char vde_sock[1024], vde_group[512];
1746         int vde_port, vde_mode;
1747         vlan->nb_host_devs++;
1748         if (get_param_value(vde_sock, sizeof(vde_sock), "sock", p) <= 0) {
1749             vde_sock[0] = '\0';
1750         }
1751         if (get_param_value(buf, sizeof(buf), "port", p) > 0) {
1752             vde_port = strtol(buf, NULL, 10);
1753         } else {
1754             vde_port = 0;
1755         }
1756         if (get_param_value(vde_group, sizeof(vde_group), "group", p) <= 0) {
1757             vde_group[0] = '\0';
1758         }
1759         if (get_param_value(buf, sizeof(buf), "mode", p) > 0) {
1760             vde_mode = strtol(buf, NULL, 8);
1761         } else {
1762             vde_mode = 0700;
1763         }
1764         ret = net_vde_init(vlan, device, name, vde_sock, vde_port, vde_group, vde_mode);
1765     } else
1766 #endif
1767     {
1768         fprintf(stderr, "Unknown network device: %s\n", device);
1769         ret = -1;
1770         goto out;
1771     }
1772     if (ret < 0) {
1773         fprintf(stderr, "Could not initialize device '%s'\n", device);
1774     }
1775 out:
1776     if (name)
1777         free(name);
1778     return ret;
1779 }
1780
1781 void net_client_uninit(NICInfo *nd)
1782 {
1783     nd->vlan->nb_guest_devs--;
1784     nb_nics--;
1785     nd->used = 0;
1786     free((void *)nd->model);
1787 }
1788
1789 static int net_host_check_device(const char *device)
1790 {
1791     int i;
1792     const char *valid_param_list[] = { "tap", "socket"
1793 #ifdef CONFIG_SLIRP
1794                                        ,"user"
1795 #endif
1796 #ifdef CONFIG_VDE
1797                                        ,"vde"
1798 #endif
1799     };
1800     for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) {
1801         if (!strncmp(valid_param_list[i], device,
1802                      strlen(valid_param_list[i])))
1803             return 1;
1804     }
1805
1806     return 0;
1807 }
1808
1809 void net_host_device_add(const char *device, const char *opts)
1810 {
1811     if (!net_host_check_device(device)) {
1812         term_printf("invalid host network device %s\n", device);
1813         return;
1814     }
1815     net_client_init(device, opts);
1816 }
1817
1818 void net_host_device_remove(int vlan_id, const char *device)
1819 {
1820     VLANState *vlan;
1821     VLANClientState *vc;
1822
1823     vlan = qemu_find_vlan(vlan_id);
1824     if (!vlan) {
1825         term_printf("can't find vlan %d\n", vlan_id);
1826         return;
1827     }
1828
1829    for(vc = vlan->first_client; vc != NULL; vc = vc->next)
1830         if (!strcmp(vc->name, device))
1831             break;
1832
1833     if (!vc) {
1834         term_printf("can't find device %s\n", device);
1835         return;
1836     }
1837     qemu_del_vlan_client(vc);
1838 }
1839
1840 int net_client_parse(const char *str)
1841 {
1842     const char *p;
1843     char *q;
1844     char device[64];
1845
1846     p = str;
1847     q = device;
1848     while (*p != '\0' && *p != ',') {
1849         if ((q - device) < sizeof(device) - 1)
1850             *q++ = *p;
1851         p++;
1852     }
1853     *q = '\0';
1854     if (*p == ',')
1855         p++;
1856
1857     return net_client_init(device, p);
1858 }
1859
1860 void do_info_network(void)
1861 {
1862     VLANState *vlan;
1863     VLANClientState *vc;
1864
1865     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1866         term_printf("VLAN %d devices:\n", vlan->id);
1867         for(vc = vlan->first_client; vc != NULL; vc = vc->next)
1868             term_printf("  %s: %s\n", vc->name, vc->info_str);
1869     }
1870 }
1871
1872 int do_set_link(const char *name, const char *up_or_down)
1873 {
1874     VLANState *vlan;
1875     VLANClientState *vc = NULL;
1876
1877     for (vlan = first_vlan; vlan != NULL; vlan = vlan->next)
1878         for (vc = vlan->first_client; vc != NULL; vc = vc->next)
1879             if (strcmp(vc->name, name) == 0)
1880                 goto done;
1881 done:
1882
1883     if (!vc) {
1884         term_printf("could not find network device '%s'", name);
1885         return 0;
1886     }
1887
1888     if (strcmp(up_or_down, "up") == 0)
1889         vc->link_down = 0;
1890     else if (strcmp(up_or_down, "down") == 0)
1891         vc->link_down = 1;
1892     else
1893         term_printf("invalid link status '%s'; only 'up' or 'down' valid\n",
1894                     up_or_down);
1895
1896     if (vc->link_status_changed)
1897         vc->link_status_changed(vc);
1898
1899     return 1;
1900 }
1901
1902 void net_cleanup(void)
1903 {
1904     VLANState *vlan;
1905
1906 #if !defined(_WIN32)
1907     /* close network clients */
1908     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1909         VLANClientState *vc;
1910
1911         for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
1912             if (vc->fd_read == tap_receive) {
1913                 TAPState *s = vc->opaque;
1914
1915                 if (s->down_script[0])
1916                     launch_script(s->down_script, s->down_script_arg, s->fd);
1917             }
1918 #if defined(CONFIG_VDE)
1919             if (vc->fd_read == vde_from_qemu) {
1920                 VDEState *s = vc->opaque;
1921                 vde_close(s->vde);
1922             }
1923 #endif
1924         }
1925     }
1926 #endif
1927 }
1928
1929 void net_client_check(void)
1930 {
1931     VLANState *vlan;
1932
1933     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1934         if (vlan->nb_guest_devs == 0 && vlan->nb_host_devs == 0)
1935             continue;
1936         if (vlan->nb_guest_devs == 0)
1937             fprintf(stderr, "Warning: vlan %d with no nics\n", vlan->id);
1938         if (vlan->nb_host_devs == 0)
1939             fprintf(stderr,
1940                     "Warning: vlan %d is not connected to host network\n",
1941                     vlan->id);
1942     }
1943 }