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 #ifdef HAVE_IOVEC
 702 static ssize_t tap_receive_iov(void *opaque, const struct iovec *iov,
 703                                int iovcnt)
 704 {
 705     TAPState *s = opaque;
 706     ssize_t len;
 707
 708     do {
 709         len = writev(s->fd, iov, iovcnt);
 710     } while (len == -1 && (errno == EINTR || errno == EAGAIN));
 711
 712     return len;
 713 }
 714 #endif
 715
 716 static void tap_receive(void *opaque, const uint8_t *buf, int size)
 717 {
 718     TAPState *s = opaque;
 719     int ret;
 720     for(;;) {
 721         ret = write(s->fd, buf, size);
 722         if (ret < 0 && (errno == EINTR || errno == EAGAIN)) {
 723         } else {
 724             break;
 725         }
 726     }
 727 }
 728
 729 static void tap_send(void *opaque)
 730 {
 731     TAPState *s = opaque;
 732     uint8_t buf[4096];
 733     int size;
 734
 735 #ifdef __sun__
 736     struct strbuf sbuf;
 737     int f = 0;
 738     sbuf.maxlen = sizeof(buf);
 739     sbuf.buf = buf;
 740     size = getmsg(s->fd, NULL, &sbuf, &f) >=0 ? sbuf.len : -1;
 741 #else
 742     size = read(s->fd, buf, sizeof(buf));
 743 #endif
 744     if (size > 0) {
 745         qemu_send_packet(s->vc, buf, size);
 746     }
 747 }
 748
 749 /* fd support */
 750
 751 static TAPState *net_tap_fd_init(VLANState *vlan,
 752                                  const char *model,
 753                                  const char *name,
 754                                  int fd)
 755 {
 756     TAPState *s;
 757
 758     s = qemu_mallocz(sizeof(TAPState));
 759     s->fd = fd;
 760     s->vc = qemu_new_vlan_client(vlan, model, name, tap_receive, NULL, s);
 761 #ifdef HAVE_IOVEC
 762     s->vc->fd_readv = tap_receive_iov;
 763 #endif
 764     qemu_set_fd_handler(s->fd, tap_send, NULL, s);
 765     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "fd=%d", fd);
 766     return s;
 767 }
 768
 769 #if defined (_BSD) || defined (__FreeBSD_kernel__)
 770 static int tap_open(char *ifname, int ifname_size)
 771 {
 772     int fd;
 773     char *dev;
 774     struct stat s;
 775
 776     TFR(fd = open("/dev/tap", O_RDWR));
 777     if (fd < 0) {
 778         fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n");
 779         return -1;
 780     }
 781
 782     fstat(fd, &s);
 783     dev = devname(s.st_rdev, S_IFCHR);
 784     pstrcpy(ifname, ifname_size, dev);
 785
 786     fcntl(fd, F_SETFL, O_NONBLOCK);
 787     return fd;
 788 }
 789 #elif defined(__sun__)
 790 #define TUNNEWPPA       (('T'<<16) | 0x0001)
 791 /*
 792  * Allocate TAP device, returns opened fd.
 793  * Stores dev name in the first arg(must be large enough).
 794  */
 795 int tap_alloc(char *dev, size_t dev_size)
 796 {
 797     int tap_fd, if_fd, ppa = -1;
 798     static int ip_fd = 0;
 799     char *ptr;
 800
 801     static int arp_fd = 0;
 802     int ip_muxid, arp_muxid;
 803     struct strioctl  strioc_if, strioc_ppa;
 804     int link_type = I_PLINK;;
 805     struct lifreq ifr;
 806     char actual_name[32] = "";
 807
 808     memset(&ifr, 0x0, sizeof(ifr));
 809
 810     if( *dev ){
 811        ptr = dev;
 812        while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
 813        ppa = atoi(ptr);
 814     }
 815
 816     /* Check if IP device was opened */
 817     if( ip_fd )
 818        close(ip_fd);
 819
 820     TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
 821     if (ip_fd < 0) {
 822        syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)");
 823        return -1;
 824     }
 825
 826     TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
 827     if (tap_fd < 0) {
 828        syslog(LOG_ERR, "Can't open /dev/tap");
 829        return -1;
 830     }
 831
 832     /* Assign a new PPA and get its unit number. */
 833     strioc_ppa.ic_cmd = TUNNEWPPA;
 834     strioc_ppa.ic_timout = 0;
 835     strioc_ppa.ic_len = sizeof(ppa);
 836     strioc_ppa.ic_dp = (char *)&ppa;
 837     if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
 838        syslog (LOG_ERR, "Can't assign new interface");
 839
 840     TFR(if_fd = open("/dev/tap", O_RDWR, 0));
 841     if (if_fd < 0) {
 842        syslog(LOG_ERR, "Can't open /dev/tap (2)");
 843        return -1;
 844     }
 845     if(ioctl(if_fd, I_PUSH, "ip") < 0){
 846        syslog(LOG_ERR, "Can't push IP module");
 847        return -1;
 848     }
 849
 850     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
 851         syslog(LOG_ERR, "Can't get flags\n");
 852
 853     snprintf (actual_name, 32, "tap%d", ppa);
 854     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
 855
 856     ifr.lifr_ppa = ppa;
 857     /* Assign ppa according to the unit number returned by tun device */
 858
 859     if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
 860         syslog (LOG_ERR, "Can't set PPA %d", ppa);
 861     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
 862         syslog (LOG_ERR, "Can't get flags\n");
 863     /* Push arp module to if_fd */
 864     if (ioctl (if_fd, I_PUSH, "arp") < 0)
 865         syslog (LOG_ERR, "Can't push ARP module (2)");
 866
 867     /* Push arp module to ip_fd */
 868     if (ioctl (ip_fd, I_POP, NULL) < 0)
 869         syslog (LOG_ERR, "I_POP failed\n");
 870     if (ioctl (ip_fd, I_PUSH, "arp") < 0)
 871         syslog (LOG_ERR, "Can't push ARP module (3)\n");
 872     /* Open arp_fd */
 873     TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
 874     if (arp_fd < 0)
 875        syslog (LOG_ERR, "Can't open %s\n", "/dev/tap");
 876
 877     /* Set ifname to arp */
 878     strioc_if.ic_cmd = SIOCSLIFNAME;
 879     strioc_if.ic_timout = 0;
 880     strioc_if.ic_len = sizeof(ifr);
 881     strioc_if.ic_dp = (char *)&ifr;
 882     if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
 883         syslog (LOG_ERR, "Can't set ifname to arp\n");
 884     }
 885
 886     if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
 887        syslog(LOG_ERR, "Can't link TAP device to IP");
 888        return -1;
 889     }
 890
 891     if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
 892         syslog (LOG_ERR, "Can't link TAP device to ARP");
 893
 894     close (if_fd);
 895
 896     memset(&ifr, 0x0, sizeof(ifr));
 897     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
 898     ifr.lifr_ip_muxid  = ip_muxid;
 899     ifr.lifr_arp_muxid = arp_muxid;
 900
 901     if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
 902     {
 903       ioctl (ip_fd, I_PUNLINK , arp_muxid);
 904       ioctl (ip_fd, I_PUNLINK, ip_muxid);
 905       syslog (LOG_ERR, "Can't set multiplexor id");
 906     }
 907
 908     snprintf(dev, dev_size, "tap%d", ppa);
 909     return tap_fd;
 910 }
 911
 912 static int tap_open(char *ifname, int ifname_size)
 913 {
 914     char  dev[10]="";
 915     int fd;
 916     if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){
 917        fprintf(stderr, "Cannot allocate TAP device\n");
 918        return -1;
 919     }
 920     pstrcpy(ifname, ifname_size, dev);
 921     fcntl(fd, F_SETFL, O_NONBLOCK);
 922     return fd;
 923 }
 924 #elif defined (_AIX)
 925 static int tap_open(char *ifname, int ifname_size)
 926 {
 927     fprintf (stderr, "no tap on AIX\n");
 928     return -1;
 929 }
 930 #else
 931 static int tap_open(char *ifname, int ifname_size)
 932 {
 933     struct ifreq ifr;
 934     int fd, ret;
 935
 936     TFR(fd = open("/dev/net/tun", O_RDWR));
 937     if (fd < 0) {
 938         fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n");
 939         return -1;
 940     }
 941     memset(&ifr, 0, sizeof(ifr));
 942     ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
 943     if (ifname[0] != '\0')
 944         pstrcpy(ifr.ifr_name, IFNAMSIZ, ifname);
 945     else
 946         pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d");
 947     ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
 948     if (ret != 0) {
 949         fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n");
 950         close(fd);
 951         return -1;
 952     }
 953     pstrcpy(ifname, ifname_size, ifr.ifr_name);
 954     fcntl(fd, F_SETFL, O_NONBLOCK);
 955     return fd;
 956 }
 957 #endif
 958
 959 static int launch_script(const char *setup_script, const char *ifname, int fd)
 960 {
 961     int pid, status;
 962     char *args[3];
 963     char **parg;
 964
 965         /* try to launch network script */
 966         pid = fork();
 967         if (pid >= 0) {
 968             if (pid == 0) {
 969                 int open_max = sysconf (_SC_OPEN_MAX), i;
 970                 for (i = 0; i < open_max; i++)
 971                     if (i != STDIN_FILENO &&
 972                         i != STDOUT_FILENO &&
 973                         i != STDERR_FILENO &&
 974                         i != fd)
 975                         close(i);
 976
 977                 parg = args;
 978                 *parg++ = (char *)setup_script;
 979                 *parg++ = (char *)ifname;
 980                 *parg++ = NULL;
 981                 execv(setup_script, args);
 982                 _exit(1);
 983             }
 984             while (waitpid(pid, &status, 0) != pid);
 985             if (!WIFEXITED(status) ||
 986                 WEXITSTATUS(status) != 0) {
 987                 fprintf(stderr, "%s: could not launch network script\n",
 988                         setup_script);
 989                 return -1;
 990             }
 991         }
 992     return 0;
 993 }
 994
 995 static int net_tap_init(VLANState *vlan, const char *model,
 996                         const char *name, const char *ifname1,
 997                         const char *setup_script, const char *down_script)
 998 {
 999     TAPState *s;
1000     int fd;
1001     char ifname[128];
1002
1003     if (ifname1 != NULL)
1004         pstrcpy(ifname, sizeof(ifname), ifname1);
1005     else
1006         ifname[0] = '\0';
1007     TFR(fd = tap_open(ifname, sizeof(ifname)));
1008     if (fd < 0)
1009         return -1;
1010
1011     if (!setup_script || !strcmp(setup_script, "no"))
1012         setup_script = "";
1013     if (setup_script[0] != '\0') {
1014         if (launch_script(setup_script, ifname, fd))
1015             return -1;
1016     }
1017     s = net_tap_fd_init(vlan, model, name, fd);
1018     if (!s)
1019         return -1;
1020     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1021              "ifname=%s,script=%s,downscript=%s",
1022              ifname, setup_script, down_script);
1023     if (down_script && strcmp(down_script, "no")) {
1024         snprintf(s->down_script, sizeof(s->down_script), "%s", down_script);
1025         snprintf(s->down_script_arg, sizeof(s->down_script_arg), "%s", ifname);
1026     }
1027     return 0;
1028 }
1029
1030 #endif /* !_WIN32 */
1031
1032 #if defined(CONFIG_VDE)
1033 typedef struct VDEState {
1034     VLANClientState *vc;
1035     VDECONN *vde;
1036 } VDEState;
1037
1038 static void vde_to_qemu(void *opaque)
1039 {
1040     VDEState *s = opaque;
1041     uint8_t buf[4096];
1042     int size;
1043
1044     size = vde_recv(s->vde, buf, sizeof(buf), 0);
1045     if (size > 0) {
1046         qemu_send_packet(s->vc, buf, size);
1047     }
1048 }
1049
1050 static void vde_from_qemu(void *opaque, const uint8_t *buf, int size)
1051 {
1052     VDEState *s = opaque;
1053     int ret;
1054     for(;;) {
1055         ret = vde_send(s->vde, buf, size, 0);
1056         if (ret < 0 && errno == EINTR) {
1057         } else {
1058             break;
1059         }
1060     }
1061 }
1062
1063 static int net_vde_init(VLANState *vlan, const char *model,
1064                         const char *name, const char *sock,
1065                         int port, const char *group, int mode)
1066 {
1067     VDEState *s;
1068     char *init_group = strlen(group) ? (char *)group : NULL;
1069     char *init_sock = strlen(sock) ? (char *)sock : NULL;
1070
1071     struct vde_open_args args = {
1072         .port = port,
1073         .group = init_group,
1074         .mode = mode,
1075     };
1076
1077     s = qemu_mallocz(sizeof(VDEState));
1078     s->vde = vde_open(init_sock, "QEMU", &args);
1079     if (!s->vde){
1080         free(s);
1081         return -1;
1082     }
1083     s->vc = qemu_new_vlan_client(vlan, model, name, vde_from_qemu, NULL, s);
1084     qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
1085     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "sock=%s,fd=%d",
1086              sock, vde_datafd(s->vde));
1087     return 0;
1088 }
1089 #endif
1090
1091 /* network connection */
1092 typedef struct NetSocketState {
1093     VLANClientState *vc;
1094     int fd;
1095     int state; /* 0 = getting length, 1 = getting data */
1096     unsigned int index;
1097     unsigned int packet_len;
1098     uint8_t buf[4096];
1099     struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
1100 } NetSocketState;
1101
1102 typedef struct NetSocketListenState {
1103     VLANState *vlan;
1104     char *model;
1105     char *name;
1106     int fd;
1107 } NetSocketListenState;
1108
1109 /* XXX: we consider we can send the whole packet without blocking */
1110 static void net_socket_receive(void *opaque, const uint8_t *buf, int size)
1111 {
1112     NetSocketState *s = opaque;
1113     uint32_t len;
1114     len = htonl(size);
1115
1116     send_all(s->fd, (const uint8_t *)&len, sizeof(len));
1117     send_all(s->fd, buf, size);
1118 }
1119
1120 static void net_socket_receive_dgram(void *opaque, const uint8_t *buf, int size)
1121 {
1122     NetSocketState *s = opaque;
1123     sendto(s->fd, buf, size, 0,
1124            (struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst));
1125 }
1126
1127 static void net_socket_send(void *opaque)
1128 {
1129     NetSocketState *s = opaque;
1130     int size, err;
1131     unsigned l;
1132     uint8_t buf1[4096];
1133     const uint8_t *buf;
1134
1135     size = recv(s->fd, buf1, sizeof(buf1), 0);
1136     if (size < 0) {
1137         err = socket_error();
1138         if (err != EWOULDBLOCK)
1139             goto eoc;
1140     } else if (size == 0) {
1141         /* end of connection */
1142     eoc:
1143         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1144         closesocket(s->fd);
1145         return;
1146     }
1147     buf = buf1;
1148     while (size > 0) {
1149         /* reassemble a packet from the network */
1150         switch(s->state) {
1151         case 0:
1152             l = 4 - s->index;
1153             if (l > size)
1154                 l = size;
1155             memcpy(s->buf + s->index, buf, l);
1156             buf += l;
1157             size -= l;
1158             s->index += l;
1159             if (s->index == 4) {
1160                 /* got length */
1161                 s->packet_len = ntohl(*(uint32_t *)s->buf);
1162                 s->index = 0;
1163                 s->state = 1;
1164             }
1165             break;
1166         case 1:
1167             l = s->packet_len - s->index;
1168             if (l > size)
1169                 l = size;
1170             if (s->index + l <= sizeof(s->buf)) {
1171                 memcpy(s->buf + s->index, buf, l);
1172             } else {
1173                 fprintf(stderr, "serious error: oversized packet received,"
1174                     "connection terminated.\n");
1175                 s->state = 0;
1176                 goto eoc;
1177             }
1178
1179             s->index += l;
1180             buf += l;
1181             size -= l;
1182             if (s->index >= s->packet_len) {
1183                 qemu_send_packet(s->vc, s->buf, s->packet_len);
1184                 s->index = 0;
1185                 s->state = 0;
1186             }
1187             break;
1188         }
1189     }
1190 }
1191
1192 static void net_socket_send_dgram(void *opaque)
1193 {
1194     NetSocketState *s = opaque;
1195     int size;
1196
1197     size = recv(s->fd, s->buf, sizeof(s->buf), 0);
1198     if (size < 0)
1199         return;
1200     if (size == 0) {
1201         /* end of connection */
1202         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1203         return;
1204     }
1205     qemu_send_packet(s->vc, s->buf, size);
1206 }
1207
1208 static int net_socket_mcast_create(struct sockaddr_in *mcastaddr)
1209 {
1210     struct ip_mreq imr;
1211     int fd;
1212     int val, ret;
1213     if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
1214         fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n",
1215                 inet_ntoa(mcastaddr->sin_addr),
1216                 (int)ntohl(mcastaddr->sin_addr.s_addr));
1217         return -1;
1218
1219     }
1220     fd = socket(PF_INET, SOCK_DGRAM, 0);
1221     if (fd < 0) {
1222         perror("socket(PF_INET, SOCK_DGRAM)");
1223         return -1;
1224     }
1225
1226     val = 1;
1227     ret=setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
1228                    (const char *)&val, sizeof(val));
1229     if (ret < 0) {
1230         perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
1231         goto fail;
1232     }
1233
1234     ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
1235     if (ret < 0) {
1236         perror("bind");
1237         goto fail;
1238     }
1239
1240     /* Add host to multicast group */
1241     imr.imr_multiaddr = mcastaddr->sin_addr;
1242     imr.imr_interface.s_addr = htonl(INADDR_ANY);
1243
1244     ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1245                      (const char *)&imr, sizeof(struct ip_mreq));
1246     if (ret < 0) {
1247         perror("setsockopt(IP_ADD_MEMBERSHIP)");
1248         goto fail;
1249     }
1250
1251     /* Force mcast msgs to loopback (eg. several QEMUs in same host */
1252     val = 1;
1253     ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1254                    (const char *)&val, sizeof(val));
1255     if (ret < 0) {
1256         perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
1257         goto fail;
1258     }
1259
1260     socket_set_nonblock(fd);
1261     return fd;
1262 fail:
1263     if (fd >= 0)
1264         closesocket(fd);
1265     return -1;
1266 }
1267
1268 static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
1269                                                 const char *model,
1270                                                 const char *name,
1271                                                 int fd, int is_connected)
1272 {
1273     struct sockaddr_in saddr;
1274     int newfd;
1275     socklen_t saddr_len;
1276     NetSocketState *s;
1277
1278     /* fd passed: multicast: "learn" dgram_dst address from bound address and save it
1279      * Because this may be "shared" socket from a "master" process, datagrams would be recv()
1280      * by ONLY ONE process: we must "clone" this dgram socket --jjo
1281      */
1282
1283     if (is_connected) {
1284         if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
1285             /* must be bound */
1286             if (saddr.sin_addr.s_addr==0) {
1287                 fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, cannot setup multicast dst addr\n",
1288                         fd);
1289                 return NULL;
1290             }
1291             /* clone dgram socket */
1292             newfd = net_socket_mcast_create(&saddr);
1293             if (newfd < 0) {
1294                 /* error already reported by net_socket_mcast_create() */
1295                 close(fd);
1296                 return NULL;
1297             }
1298             /* clone newfd to fd, close newfd */
1299             dup2(newfd, fd);
1300             close(newfd);
1301
1302         } else {
1303             fprintf(stderr, "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
1304                     fd, strerror(errno));
1305             return NULL;
1306         }
1307     }
1308
1309     s = qemu_mallocz(sizeof(NetSocketState));
1310     s->fd = fd;
1311
1312     s->vc = qemu_new_vlan_client(vlan, model, name, net_socket_receive_dgram, NULL, s);
1313     qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s);
1314
1315     /* mcast: save bound address as dst */
1316     if (is_connected) s->dgram_dst=saddr;
1317
1318     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1319             "socket: fd=%d (%s mcast=%s:%d)",
1320             fd, is_connected? "cloned" : "",
1321             inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1322     return s;
1323 }
1324
1325 static void net_socket_connect(void *opaque)
1326 {
1327     NetSocketState *s = opaque;
1328     qemu_set_fd_handler(s->fd, net_socket_send, NULL, s);
1329 }
1330
1331 static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
1332                                                  const char *model,
1333                                                  const char *name,
1334                                                  int fd, int is_connected)
1335 {
1336     NetSocketState *s;
1337     s = qemu_mallocz(sizeof(NetSocketState));
1338     s->fd = fd;
1339     s->vc = qemu_new_vlan_client(vlan, model, name,
1340                                  net_socket_receive, NULL, s);
1341     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1342              "socket: fd=%d", fd);
1343     if (is_connected) {
1344         net_socket_connect(s);
1345     } else {
1346         qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
1347     }
1348     return s;
1349 }
1350
1351 static NetSocketState *net_socket_fd_init(VLANState *vlan,
1352                                           const char *model, const char *name,
1353                                           int fd, int is_connected)
1354 {
1355     int so_type=-1, optlen=sizeof(so_type);
1356
1357     if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type,
1358         (socklen_t *)&optlen)< 0) {
1359         fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n", fd);
1360         return NULL;
1361     }
1362     switch(so_type) {
1363     case SOCK_DGRAM:
1364         return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected);
1365     case SOCK_STREAM:
1366         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1367     default:
1368         /* who knows ... this could be a eg. a pty, do warn and continue as stream */
1369         fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
1370         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1371     }
1372     return NULL;
1373 }
1374
1375 static void net_socket_accept(void *opaque)
1376 {
1377     NetSocketListenState *s = opaque;
1378     NetSocketState *s1;
1379     struct sockaddr_in saddr;
1380     socklen_t len;
1381     int fd;
1382
1383     for(;;) {
1384         len = sizeof(saddr);
1385         fd = accept(s->fd, (struct sockaddr *)&saddr, &len);
1386         if (fd < 0 && errno != EINTR) {
1387             return;
1388         } else if (fd >= 0) {
1389             break;
1390         }
1391     }
1392     s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1);
1393     if (!s1) {
1394         closesocket(fd);
1395     } else {
1396         snprintf(s1->vc->info_str, sizeof(s1->vc->info_str),
1397                  "socket: connection from %s:%d",
1398                  inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1399     }
1400 }
1401
1402 static int net_socket_listen_init(VLANState *vlan,
1403                                   const char *model,
1404                                   const char *name,
1405                                   const char *host_str)
1406 {
1407     NetSocketListenState *s;
1408     int fd, val, ret;
1409     struct sockaddr_in saddr;
1410
1411     if (parse_host_port(&saddr, host_str) < 0)
1412         return -1;
1413
1414     s = qemu_mallocz(sizeof(NetSocketListenState));
1415
1416     fd = socket(PF_INET, SOCK_STREAM, 0);
1417     if (fd < 0) {
1418         perror("socket");
1419         return -1;
1420     }
1421     socket_set_nonblock(fd);
1422
1423     /* allow fast reuse */
1424     val = 1;
1425     setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));
1426
1427     ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
1428     if (ret < 0) {
1429         perror("bind");
1430         return -1;
1431     }
1432     ret = listen(fd, 0);
1433     if (ret < 0) {
1434         perror("listen");
1435         return -1;
1436     }
1437     s->vlan = vlan;
1438     s->model = strdup(model);
1439     s->name = strdup(name);
1440     s->fd = fd;
1441     qemu_set_fd_handler(fd, net_socket_accept, NULL, s);
1442     return 0;
1443 }
1444
1445 static int net_socket_connect_init(VLANState *vlan,
1446                                    const char *model,
1447                                    const char *name,
1448                                    const char *host_str)
1449 {
1450     NetSocketState *s;
1451     int fd, connected, ret, err;
1452     struct sockaddr_in saddr;
1453
1454     if (parse_host_port(&saddr, host_str) < 0)
1455         return -1;
1456
1457     fd = socket(PF_INET, SOCK_STREAM, 0);
1458     if (fd < 0) {
1459         perror("socket");
1460         return -1;
1461     }
1462     socket_set_nonblock(fd);
1463
1464     connected = 0;
1465     for(;;) {
1466         ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
1467         if (ret < 0) {
1468             err = socket_error();
1469             if (err == EINTR || err == EWOULDBLOCK) {
1470             } else if (err == EINPROGRESS) {
1471                 break;
1472 #ifdef _WIN32
1473             } else if (err == WSAEALREADY) {
1474                 break;
1475 #endif
1476             } else {
1477                 perror("connect");
1478                 closesocket(fd);
1479                 return -1;
1480             }
1481         } else {
1482             connected = 1;
1483             break;
1484         }
1485     }
1486     s = net_socket_fd_init(vlan, model, name, fd, connected);
1487     if (!s)
1488         return -1;
1489     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1490              "socket: connect to %s:%d",
1491              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1492     return 0;
1493 }
1494
1495 static int net_socket_mcast_init(VLANState *vlan,
1496                                  const char *model,
1497                                  const char *name,
1498                                  const char *host_str)
1499 {
1500     NetSocketState *s;
1501     int fd;
1502     struct sockaddr_in saddr;
1503
1504     if (parse_host_port(&saddr, host_str) < 0)
1505         return -1;
1506
1507
1508     fd = net_socket_mcast_create(&saddr);
1509     if (fd < 0)
1510         return -1;
1511
1512     s = net_socket_fd_init(vlan, model, name, fd, 0);
1513     if (!s)
1514         return -1;
1515
1516     s->dgram_dst = saddr;
1517
1518     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1519              "socket: mcast=%s:%d",
1520              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1521     return 0;
1522
1523 }
1524
1525 /* find or alloc a new VLAN */
1526 VLANState *qemu_find_vlan(int id)
1527 {
1528     VLANState **pvlan, *vlan;
1529     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1530         if (vlan->id == id)
1531             return vlan;
1532     }
1533     vlan = qemu_mallocz(sizeof(VLANState));
1534     vlan->id = id;
1535     vlan->next = NULL;
1536     pvlan = &first_vlan;
1537     while (*pvlan != NULL)
1538         pvlan = &(*pvlan)->next;
1539     *pvlan = vlan;
1540     return vlan;
1541 }
1542
1543 static int nic_get_free_idx(void)
1544 {
1545     int index;
1546
1547     for (index = 0; index < MAX_NICS; index++)
1548         if (!nd_table[index].used)
1549             return index;
1550     return -1;
1551 }
1552
1553 void qemu_check_nic_model(NICInfo *nd, const char *model)
1554 {
1555     const char *models[2];
1556
1557     models[0] = model;
1558     models[1] = NULL;
1559
1560     qemu_check_nic_model_list(nd, models, model);
1561 }
1562
1563 void qemu_check_nic_model_list(NICInfo *nd, const char * const *models,
1564                                const char *default_model)
1565 {
1566     int i, exit_status = 0;
1567
1568     if (!nd->model)
1569         nd->model = strdup(default_model);
1570
1571     if (strcmp(nd->model, "?") != 0) {
1572         for (i = 0 ; models[i]; i++)
1573             if (strcmp(nd->model, models[i]) == 0)
1574                 return;
1575
1576         fprintf(stderr, "qemu: Unsupported NIC model: %s\n", nd->model);
1577         exit_status = 1;
1578     }
1579
1580     fprintf(stderr, "qemu: Supported NIC models: ");
1581     for (i = 0 ; models[i]; i++)
1582         fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
1583
1584     exit(exit_status);
1585 }
1586
1587 int net_client_init(const char *device, const char *p)
1588 {
1589     char buf[1024];
1590     int vlan_id, ret;
1591     VLANState *vlan;
1592     char *name = NULL;
1593
1594     vlan_id = 0;
1595     if (get_param_value(buf, sizeof(buf), "vlan", p)) {
1596         vlan_id = strtol(buf, NULL, 0);
1597     }
1598     vlan = qemu_find_vlan(vlan_id);
1599     if (!vlan) {
1600         fprintf(stderr, "Could not create vlan %d\n", vlan_id);
1601         return -1;
1602     }
1603     if (get_param_value(buf, sizeof(buf), "name", p)) {
1604         name = strdup(buf);
1605     }
1606     if (!strcmp(device, "nic")) {
1607         NICInfo *nd;
1608         uint8_t *macaddr;
1609         int idx = nic_get_free_idx();
1610
1611         if (idx == -1 || nb_nics >= MAX_NICS) {
1612             fprintf(stderr, "Too Many NICs\n");
1613             return -1;
1614         }
1615         nd = &nd_table[idx];
1616         macaddr = nd->macaddr;
1617         macaddr[0] = 0x52;
1618         macaddr[1] = 0x54;
1619         macaddr[2] = 0x00;
1620         macaddr[3] = 0x12;
1621         macaddr[4] = 0x34;
1622         macaddr[5] = 0x56 + idx;
1623
1624         if (get_param_value(buf, sizeof(buf), "macaddr", p)) {
1625             if (parse_macaddr(macaddr, buf) < 0) {
1626                 fprintf(stderr, "invalid syntax for ethernet address\n");
1627                 return -1;
1628             }
1629         }
1630         if (get_param_value(buf, sizeof(buf), "model", p)) {
1631             nd->model = strdup(buf);
1632         }
1633         nd->vlan = vlan;
1634         nd->name = name;
1635         nd->used = 1;
1636         name = NULL;
1637         nb_nics++;
1638         vlan->nb_guest_devs++;
1639         ret = idx;
1640     } else
1641     if (!strcmp(device, "none")) {
1642         /* does nothing. It is needed to signal that no network cards
1643            are wanted */
1644         ret = 0;
1645     } else
1646 #ifdef CONFIG_SLIRP
1647     if (!strcmp(device, "user")) {
1648         if (get_param_value(buf, sizeof(buf), "hostname", p)) {
1649             pstrcpy(slirp_hostname, sizeof(slirp_hostname), buf);
1650         }
1651         if (get_param_value(buf, sizeof(buf), "restrict", p)) {
1652             slirp_restrict = (buf[0] == 'y') ? 1 : 0;
1653         }
1654         if (get_param_value(buf, sizeof(buf), "ip", p)) {
1655             slirp_ip = strdup(buf);
1656         }
1657         vlan->nb_host_devs++;
1658         ret = net_slirp_init(vlan, device, name);
1659     } else if (!strcmp(device, "channel")) {
1660         long port;
1661         char name[20], *devname;
1662         struct VMChannel *vmc;
1663
1664         port = strtol(p, &devname, 10);
1665         devname++;
1666         if (port < 1 || port > 65535) {
1667             fprintf(stderr, "vmchannel wrong port number\n");
1668             return -1;
1669         }
1670         vmc = malloc(sizeof(struct VMChannel));
1671         snprintf(name, 20, "vmchannel%ld", port);
1672         vmc->hd = qemu_chr_open(name, devname, NULL);
1673         if (!vmc->hd) {
1674             fprintf(stderr, "qemu: could not open vmchannel device"
1675                     "'%s'\n", devname);
1676             return -1;
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             return -1;
1691         }
1692         vlan->nb_host_devs++;
1693         ret = tap_win32_init(vlan, device, name, ifname);
1694     } else
1695 #elif defined (_AIX)
1696 #else
1697     if (!strcmp(device, "tap")) {
1698         char ifname[64];
1699         char setup_script[1024], down_script[1024];
1700         int fd;
1701         vlan->nb_host_devs++;
1702         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
1703             fd = strtol(buf, NULL, 0);
1704             fcntl(fd, F_SETFL, O_NONBLOCK);
1705             ret = -1;
1706             if (net_tap_fd_init(vlan, device, name, fd))
1707                 ret = 0;
1708         } else {
1709             if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
1710                 ifname[0] = '\0';
1711             }
1712             if (get_param_value(setup_script, sizeof(setup_script), "script", p) == 0) {
1713                 pstrcpy(setup_script, sizeof(setup_script), DEFAULT_NETWORK_SCRIPT);
1714             }
1715             if (get_param_value(down_script, sizeof(down_script), "downscript", p) == 0) {
1716                 pstrcpy(down_script, sizeof(down_script), DEFAULT_NETWORK_DOWN_SCRIPT);
1717             }
1718             ret = net_tap_init(vlan, device, name, ifname, setup_script, down_script);
1719         }
1720     } else
1721 #endif
1722     if (!strcmp(device, "socket")) {
1723         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
1724             int fd;
1725             fd = strtol(buf, NULL, 0);
1726             ret = -1;
1727             if (net_socket_fd_init(vlan, device, name, fd, 1))
1728                 ret = 0;
1729         } else if (get_param_value(buf, sizeof(buf), "listen", p) > 0) {
1730             ret = net_socket_listen_init(vlan, device, name, buf);
1731         } else if (get_param_value(buf, sizeof(buf), "connect", p) > 0) {
1732             ret = net_socket_connect_init(vlan, device, name, buf);
1733         } else if (get_param_value(buf, sizeof(buf), "mcast", p) > 0) {
1734             ret = net_socket_mcast_init(vlan, device, name, buf);
1735         } else {
1736             fprintf(stderr, "Unknown socket options: %s\n", p);
1737             return -1;
1738         }
1739         vlan->nb_host_devs++;
1740     } else
1741 #ifdef CONFIG_VDE
1742     if (!strcmp(device, "vde")) {
1743         char vde_sock[1024], vde_group[512];
1744         int vde_port, vde_mode;
1745         vlan->nb_host_devs++;
1746         if (get_param_value(vde_sock, sizeof(vde_sock), "sock", p) <= 0) {
1747             vde_sock[0] = '\0';
1748         }
1749         if (get_param_value(buf, sizeof(buf), "port", p) > 0) {
1750             vde_port = strtol(buf, NULL, 10);
1751         } else {
1752             vde_port = 0;
1753         }
1754         if (get_param_value(vde_group, sizeof(vde_group), "group", p) <= 0) {
1755             vde_group[0] = '\0';
1756         }
1757         if (get_param_value(buf, sizeof(buf), "mode", p) > 0) {
1758             vde_mode = strtol(buf, NULL, 8);
1759         } else {
1760             vde_mode = 0700;
1761         }
1762         ret = net_vde_init(vlan, device, name, vde_sock, vde_port, vde_group, vde_mode);
1763     } else
1764 #endif
1765     {
1766         fprintf(stderr, "Unknown network device: %s\n", device);
1767         if (name)
1768             free(name);
1769         return -1;
1770     }
1771     if (ret < 0) {
1772         fprintf(stderr, "Could not initialize device '%s'\n", device);
1773     }
1774     if (name)
1775         free(name);
1776     return ret;
1777 }
1778
1779 void net_client_uninit(NICInfo *nd)
1780 {
1781     nd->vlan->nb_guest_devs--;
1782     nb_nics--;
1783     nd->used = 0;
1784     free((void *)nd->model);
1785 }
1786
1787 static int net_host_check_device(const char *device)
1788 {
1789     int i;
1790     const char *valid_param_list[] = { "tap", "socket"
1791 #ifdef CONFIG_SLIRP
1792                                        ,"user"
1793 #endif
1794 #ifdef CONFIG_VDE
1795                                        ,"vde"
1796 #endif
1797     };
1798     for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) {
1799         if (!strncmp(valid_param_list[i], device,
1800                      strlen(valid_param_list[i])))
1801             return 1;
1802     }
1803
1804     return 0;
1805 }
1806
1807 void net_host_device_add(const char *device, const char *opts)
1808 {
1809     if (!net_host_check_device(device)) {
1810         term_printf("invalid host network device %s\n", device);
1811         return;
1812     }
1813     net_client_init(device, opts);
1814 }
1815
1816 void net_host_device_remove(int vlan_id, const char *device)
1817 {
1818     VLANState *vlan;
1819     VLANClientState *vc;
1820
1821     if (!net_host_check_device(device)) {
1822         term_printf("invalid host network device %s\n", device);
1823         return;
1824     }
1825
1826     vlan = qemu_find_vlan(vlan_id);
1827     if (!vlan) {
1828         term_printf("can't find vlan %d\n", vlan_id);
1829         return;
1830     }
1831
1832    for(vc = vlan->first_client; vc != NULL; vc = vc->next)
1833         if (!strcmp(vc->name, device))
1834             break;
1835
1836     if (!vc) {
1837         term_printf("can't find device %s\n", device);
1838         return;
1839     }
1840     qemu_del_vlan_client(vc);
1841 }
1842
1843 int net_client_parse(const char *str)
1844 {
1845     const char *p;
1846     char *q;
1847     char device[64];
1848
1849     p = str;
1850     q = device;
1851     while (*p != '\0' && *p != ',') {
1852         if ((q - device) < sizeof(device) - 1)
1853             *q++ = *p;
1854         p++;
1855     }
1856     *q = '\0';
1857     if (*p == ',')
1858         p++;
1859
1860     return net_client_init(device, p);
1861 }
1862
1863 void do_info_network(void)
1864 {
1865     VLANState *vlan;
1866     VLANClientState *vc;
1867
1868     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1869         term_printf("VLAN %d devices:\n", vlan->id);
1870         for(vc = vlan->first_client; vc != NULL; vc = vc->next)
1871             term_printf("  %s: %s\n", vc->name, vc->info_str);
1872     }
1873 }
1874
1875 int do_set_link(const char *name, const char *up_or_down)
1876 {
1877     VLANState *vlan;
1878     VLANClientState *vc = NULL;
1879
1880     for (vlan = first_vlan; vlan != NULL; vlan = vlan->next)
1881         for (vc = vlan->first_client; vc != NULL; vc = vc->next)
1882             if (strcmp(vc->name, name) == 0)
1883                 goto done;
1884 done:
1885
1886     if (!vc) {
1887         term_printf("could not find network device '%s'", name);
1888         return 0;
1889     }
1890
1891     if (strcmp(up_or_down, "up") == 0)
1892         vc->link_down = 0;
1893     else if (strcmp(up_or_down, "down") == 0)
1894         vc->link_down = 1;
1895     else
1896         term_printf("invalid link status '%s'; only 'up' or 'down' valid\n",
1897                     up_or_down);
1898
1899     if (vc->link_status_changed)
1900         vc->link_status_changed(vc);
1901
1902     return 1;
1903 }
1904
1905 void net_cleanup(void)
1906 {
1907     VLANState *vlan;
1908
1909 #if !defined(_WIN32)
1910     /* close network clients */
1911     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1912         VLANClientState *vc;
1913
1914         for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
1915             if (vc->fd_read == tap_receive) {
1916                 TAPState *s = vc->opaque;
1917
1918                 if (s->down_script[0])
1919                     launch_script(s->down_script, s->down_script_arg, s->fd);
1920             }
1921 #if defined(CONFIG_VDE)
1922             if (vc->fd_read == vde_from_qemu) {
1923                 VDEState *s = vc->opaque;
1924                 vde_close(s->vde);
1925             }
1926 #endif
1927         }
1928     }
1929 #endif
1930 }
1931
1932 void net_client_check(void)
1933 {
1934     VLANState *vlan;
1935
1936     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1937         if (vlan->nb_guest_devs == 0 && vlan->nb_host_devs == 0)
1938             continue;
1939         if (vlan->nb_guest_devs == 0)
1940             fprintf(stderr, "Warning: vlan %d with no nics\n", vlan->id);
1941         if (vlan->nb_host_devs == 0)
1942             fprintf(stderr,
1943                     "Warning: vlan %d is not connected to host network\n",
1944                     vlan->id);
1945     }
1946 }