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