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 <unistd.h>
  25 #include <fcntl.h>
  26 #include <signal.h>
  27 #include <time.h>
  28 #include <errno.h>
  29 #include <sys/time.h>
  30 #include <zlib.h>
  31
  32 /* Needed early for CONFIG_BSD etc. */
  33 #include "config-host.h"
  34
  35 #ifndef _WIN32
  36 #include <sys/times.h>
  37 #include <sys/wait.h>
  38 #include <termios.h>
  39 #include <sys/mman.h>
  40 #include <sys/ioctl.h>
  41 #include <sys/resource.h>
  42 #include <sys/socket.h>
  43 #include <netinet/in.h>
  44 #include <net/if.h>
  45 #ifdef __NetBSD__
  46 #include <net/if_tap.h>
  47 #endif
  48 #ifdef __linux__
  49 #include <linux/if_tun.h>
  50 #endif
  51 #include <arpa/inet.h>
  52 #include <dirent.h>
  53 #include <netdb.h>
  54 #include <sys/select.h>
  55 #ifdef CONFIG_BSD
  56 #include <sys/stat.h>
  57 #if defined(__FreeBSD__) || defined(__DragonFly__)
  58 #include <libutil.h>
  59 #else
  60 #include <util.h>
  61 #endif
  62 #elif defined (__GLIBC__) && defined (__FreeBSD_kernel__)
  63 #include <freebsd/stdlib.h>
  64 #else
  65 #ifdef __linux__
  66 #include <pty.h>
  67 #include <malloc.h>
  68 #include <linux/rtc.h>
  69
  70 /* For the benefit of older linux systems which don't supply it,
  71    we use a local copy of hpet.h. */
  72 /* #include <linux/hpet.h> */
  73 #include "hpet.h"
  74
  75 #include <linux/ppdev.h>
  76 #include <linux/parport.h>
  77 #endif
  78 #ifdef __sun__
  79 #include <sys/stat.h>
  80 #include <sys/ethernet.h>
  81 #include <sys/sockio.h>
  82 #include <netinet/arp.h>
  83 #include <netinet/in.h>
  84 #include <netinet/in_systm.h>
  85 #include <netinet/ip.h>
  86 #include <netinet/ip_icmp.h> // must come after ip.h
  87 #include <netinet/udp.h>
  88 #include <netinet/tcp.h>
  89 #include <net/if.h>
  90 #include <syslog.h>
  91 #include <stropts.h>
  92 #endif
  93 #endif
  94 #endif
  95
  96 #if defined(__OpenBSD__)
  97 #include <util.h>
  98 #endif
  99
 100 #if defined(CONFIG_VDE)
 101 #include <libvdeplug.h>
 102 #endif
 103
 104 #include "qemu-common.h"
 105 #include "net.h"
 106 #include "monitor.h"
 107 #include "sysemu.h"
 108 #include "qemu-timer.h"
 109 #include "qemu-char.h"
 110 #include "audio/audio.h"
 111 #include "qemu_socket.h"
 112 #include "qemu-log.h"
 113
 114 #include "slirp/libslirp.h"
 115
 116
 117 static VLANState *first_vlan;
 118
 119 /***********************************************************/
 120 /* network device redirectors */
 121
 122 #if defined(DEBUG_NET) || defined(DEBUG_SLIRP)
 123 static void hex_dump(FILE *f, const uint8_t *buf, int size)
 124 {
 125     int len, i, j, c;
 126
 127     for(i=0;i<size;i+=16) {
 128         len = size - i;
 129         if (len > 16)
 130             len = 16;
 131         fprintf(f, "%08x ", i);
 132         for(j=0;j<16;j++) {
 133             if (j < len)
 134                 fprintf(f, " %02x", buf[i+j]);
 135             else
 136                 fprintf(f, "   ");
 137         }
 138         fprintf(f, " ");
 139         for(j=0;j<len;j++) {
 140             c = buf[i+j];
 141             if (c < ' ' || c > '~')
 142                 c = '.';
 143             fprintf(f, "%c", c);
 144         }
 145         fprintf(f, "\n");
 146     }
 147 }
 148 #endif
 149
 150 static int parse_macaddr(uint8_t *macaddr, const char *p)
 151 {
 152     int i;
 153     char *last_char;
 154     long int offset;
 155
 156     errno = 0;
 157     offset = strtol(p, &last_char, 0);
 158     if (0 == errno && '\0' == *last_char &&
 159             offset >= 0 && offset <= 0xFFFFFF) {
 160         macaddr[3] = (offset & 0xFF0000) >> 16;
 161         macaddr[4] = (offset & 0xFF00) >> 8;
 162         macaddr[5] = offset & 0xFF;
 163         return 0;
 164     } else {
 165         for(i = 0; i < 6; i++) {
 166             macaddr[i] = strtol(p, (char **)&p, 16);
 167             if (i == 5) {
 168                 if (*p != '\0')
 169                     return -1;
 170             } else {
 171                 if (*p != ':' && *p != '-')
 172                     return -1;
 173                 p++;
 174             }
 175         }
 176         return 0;
 177     }
 178
 179     return -1;
 180 }
 181
 182 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
 183 {
 184     const char *p, *p1;
 185     int len;
 186     p = *pp;
 187     p1 = strchr(p, sep);
 188     if (!p1)
 189         return -1;
 190     len = p1 - p;
 191     p1++;
 192     if (buf_size > 0) {
 193         if (len > buf_size - 1)
 194             len = buf_size - 1;
 195         memcpy(buf, p, len);
 196         buf[len] = '\0';
 197     }
 198     *pp = p1;
 199     return 0;
 200 }
 201
 202 int parse_host_src_port(struct sockaddr_in *haddr,
 203                         struct sockaddr_in *saddr,
 204                         const char *input_str)
 205 {
 206     char *str = strdup(input_str);
 207     char *host_str = str;
 208     char *src_str;
 209     const char *src_str2;
 210     char *ptr;
 211
 212     /*
 213      * Chop off any extra arguments at the end of the string which
 214      * would start with a comma, then fill in the src port information
 215      * if it was provided else use the "any address" and "any port".
 216      */
 217     if ((ptr = strchr(str,',')))
 218         *ptr = '\0';
 219
 220     if ((src_str = strchr(input_str,'@'))) {
 221         *src_str = '\0';
 222         src_str++;
 223     }
 224
 225     if (parse_host_port(haddr, host_str) < 0)
 226         goto fail;
 227
 228     src_str2 = src_str;
 229     if (!src_str || *src_str == '\0')
 230         src_str2 = ":0";
 231
 232     if (parse_host_port(saddr, src_str2) < 0)
 233         goto fail;
 234
 235     free(str);
 236     return(0);
 237
 238 fail:
 239     free(str);
 240     return -1;
 241 }
 242
 243 int parse_host_port(struct sockaddr_in *saddr, const char *str)
 244 {
 245     char buf[512];
 246     struct hostent *he;
 247     const char *p, *r;
 248     int port;
 249
 250     p = str;
 251     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 252         return -1;
 253     saddr->sin_family = AF_INET;
 254     if (buf[0] == '\0') {
 255         saddr->sin_addr.s_addr = 0;
 256     } else {
 257         if (qemu_isdigit(buf[0])) {
 258             if (!inet_aton(buf, &saddr->sin_addr))
 259                 return -1;
 260         } else {
 261             if ((he = gethostbyname(buf)) == NULL)
 262                 return - 1;
 263             saddr->sin_addr = *(struct in_addr *)he->h_addr;
 264         }
 265     }
 266     port = strtol(p, (char **)&r, 0);
 267     if (r == p)
 268         return -1;
 269     saddr->sin_port = htons(port);
 270     return 0;
 271 }
 272
 273 void qemu_format_nic_info_str(VLANClientState *vc, uint8_t macaddr[6])
 274 {
 275     snprintf(vc->info_str, sizeof(vc->info_str),
 276              "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x",
 277              vc->model,
 278              macaddr[0], macaddr[1], macaddr[2],
 279              macaddr[3], macaddr[4], macaddr[5]);
 280 }
 281
 282 static char *assign_name(VLANClientState *vc1, const char *model)
 283 {
 284     VLANState *vlan;
 285     char buf[256];
 286     int id = 0;
 287
 288     for (vlan = first_vlan; vlan; vlan = vlan->next) {
 289         VLANClientState *vc;
 290
 291         for (vc = vlan->first_client; vc; vc = vc->next)
 292             if (vc != vc1 && strcmp(vc->model, model) == 0)
 293                 id++;
 294     }
 295
 296     snprintf(buf, sizeof(buf), "%s.%d", model, id);
 297
 298     return strdup(buf);
 299 }
 300
 301 VLANClientState *qemu_new_vlan_client(VLANState *vlan,
 302                                       const char *model,
 303                                       const char *name,
 304                                       NetCanReceive *can_receive,
 305                                       NetReceive *receive,
 306                                       NetReceiveIOV *receive_iov,
 307                                       NetCleanup *cleanup,
 308                                       void *opaque)
 309 {
 310     VLANClientState *vc, **pvc;
 311     vc = qemu_mallocz(sizeof(VLANClientState));
 312     vc->model = strdup(model);
 313     if (name)
 314         vc->name = strdup(name);
 315     else
 316         vc->name = assign_name(vc, model);
 317     vc->can_receive = can_receive;
 318     vc->receive = receive;
 319     vc->receive_iov = receive_iov;
 320     vc->cleanup = cleanup;
 321     vc->opaque = opaque;
 322     vc->vlan = vlan;
 323
 324     vc->next = NULL;
 325     pvc = &vlan->first_client;
 326     while (*pvc != NULL)
 327         pvc = &(*pvc)->next;
 328     *pvc = vc;
 329     return vc;
 330 }
 331
 332 void qemu_del_vlan_client(VLANClientState *vc)
 333 {
 334     VLANClientState **pvc = &vc->vlan->first_client;
 335
 336     while (*pvc != NULL)
 337         if (*pvc == vc) {
 338             *pvc = vc->next;
 339             if (vc->cleanup) {
 340                 vc->cleanup(vc);
 341             }
 342             free(vc->name);
 343             free(vc->model);
 344             qemu_free(vc);
 345             break;
 346         } else
 347             pvc = &(*pvc)->next;
 348 }
 349
 350 VLANClientState *qemu_find_vlan_client(VLANState *vlan, void *opaque)
 351 {
 352     VLANClientState **pvc = &vlan->first_client;
 353
 354     while (*pvc != NULL)
 355         if ((*pvc)->opaque == opaque)
 356             return *pvc;
 357         else
 358             pvc = &(*pvc)->next;
 359
 360     return NULL;
 361 }
 362
 363 static VLANClientState *
 364 qemu_find_vlan_client_by_name(Monitor *mon, int vlan_id,
 365                               const char *client_str)
 366 {
 367     VLANState *vlan;
 368     VLANClientState *vc;
 369
 370     vlan = qemu_find_vlan(vlan_id, 0);
 371     if (!vlan) {
 372         monitor_printf(mon, "unknown VLAN %d\n", vlan_id);
 373         return NULL;
 374     }
 375
 376     for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
 377         if (!strcmp(vc->name, client_str)) {
 378             break;
 379         }
 380     }
 381     if (!vc) {
 382         monitor_printf(mon, "can't find device %s on VLAN %d\n",
 383                        client_str, vlan_id);
 384     }
 385
 386     return vc;
 387 }
 388
 389 int qemu_can_send_packet(VLANClientState *sender)
 390 {
 391     VLANState *vlan = sender->vlan;
 392     VLANClientState *vc;
 393
 394     for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
 395         if (vc == sender) {
 396             continue;
 397         }
 398
 399         /* no can_receive() handler, they can always receive */
 400         if (!vc->can_receive || vc->can_receive(vc)) {
 401             return 1;
 402         }
 403     }
 404     return 0;
 405 }
 406
 407 static int
 408 qemu_deliver_packet(VLANClientState *sender, const uint8_t *buf, int size)
 409 {
 410     VLANClientState *vc;
 411     int ret = -1;
 412
 413     sender->vlan->delivering = 1;
 414
 415     for (vc = sender->vlan->first_client; vc != NULL; vc = vc->next) {
 416         ssize_t len;
 417
 418         if (vc == sender) {
 419             continue;
 420         }
 421
 422         if (vc->link_down) {
 423             ret = size;
 424             continue;
 425         }
 426
 427         len = vc->receive(vc, buf, size);
 428
 429         ret = (ret >= 0) ? ret : len;
 430     }
 431
 432     sender->vlan->delivering = 0;
 433
 434     return ret;
 435 }
 436
 437 void qemu_purge_queued_packets(VLANClientState *vc)
 438 {
 439     VLANPacket **pp = &vc->vlan->send_queue;
 440
 441     while (*pp != NULL) {
 442         VLANPacket *packet = *pp;
 443
 444         if (packet->sender == vc) {
 445             *pp = packet->next;
 446             qemu_free(packet);
 447         } else {
 448             pp = &packet->next;
 449         }
 450     }
 451 }
 452
 453 void qemu_flush_queued_packets(VLANClientState *vc)
 454 {
 455     VLANPacket *packet;
 456
 457     while ((packet = vc->vlan->send_queue) != NULL) {
 458         int ret;
 459
 460         vc->vlan->send_queue = packet->next;
 461
 462         ret = qemu_deliver_packet(packet->sender, packet->data, packet->size);
 463         if (ret == 0 && packet->sent_cb != NULL) {
 464             packet->next = vc->vlan->send_queue;
 465             vc->vlan->send_queue = packet;
 466             break;
 467         }
 468
 469         if (packet->sent_cb)
 470             packet->sent_cb(packet->sender, ret);
 471
 472         qemu_free(packet);
 473     }
 474 }
 475
 476 static void qemu_enqueue_packet(VLANClientState *sender,
 477                                 const uint8_t *buf, int size,
 478                                 NetPacketSent *sent_cb)
 479 {
 480     VLANPacket *packet;
 481
 482     packet = qemu_malloc(sizeof(VLANPacket) + size);
 483     packet->next = sender->vlan->send_queue;
 484     packet->sender = sender;
 485     packet->size = size;
 486     packet->sent_cb = sent_cb;
 487     memcpy(packet->data, buf, size);
 488     sender->vlan->send_queue = packet;
 489 }
 490
 491 ssize_t qemu_send_packet_async(VLANClientState *sender,
 492                                const uint8_t *buf, int size,
 493                                NetPacketSent *sent_cb)
 494 {
 495     int ret;
 496
 497     if (sender->link_down) {
 498         return size;
 499     }
 500
 501 #ifdef DEBUG_NET
 502     printf("vlan %d send:\n", sender->vlan->id);
 503     hex_dump(stdout, buf, size);
 504 #endif
 505
 506     if (sender->vlan->delivering) {
 507         qemu_enqueue_packet(sender, buf, size, NULL);
 508         return size;
 509     }
 510
 511     ret = qemu_deliver_packet(sender, buf, size);
 512     if (ret == 0 && sent_cb != NULL) {
 513         qemu_enqueue_packet(sender, buf, size, sent_cb);
 514         return 0;
 515     }
 516
 517     qemu_flush_queued_packets(sender);
 518
 519     return ret;
 520 }
 521
 522 void qemu_send_packet(VLANClientState *vc, const uint8_t *buf, int size)
 523 {
 524     qemu_send_packet_async(vc, buf, size, NULL);
 525 }
 526
 527 static ssize_t vc_sendv_compat(VLANClientState *vc, const struct iovec *iov,
 528                                int iovcnt)
 529 {
 530     uint8_t buffer[4096];
 531     size_t offset = 0;
 532     int i;
 533
 534     for (i = 0; i < iovcnt; i++) {
 535         size_t len;
 536
 537         len = MIN(sizeof(buffer) - offset, iov[i].iov_len);
 538         memcpy(buffer + offset, iov[i].iov_base, len);
 539         offset += len;
 540     }
 541
 542     return vc->receive(vc, buffer, offset);
 543 }
 544
 545 static ssize_t calc_iov_length(const struct iovec *iov, int iovcnt)
 546 {
 547     size_t offset = 0;
 548     int i;
 549
 550     for (i = 0; i < iovcnt; i++)
 551         offset += iov[i].iov_len;
 552     return offset;
 553 }
 554
 555 static int qemu_deliver_packet_iov(VLANClientState *sender,
 556                                    const struct iovec *iov, int iovcnt)
 557 {
 558     VLANClientState *vc;
 559     int ret = -1;
 560
 561     sender->vlan->delivering = 1;
 562
 563     for (vc = sender->vlan->first_client; vc != NULL; vc = vc->next) {
 564         ssize_t len;
 565
 566         if (vc == sender) {
 567             continue;
 568         }
 569
 570         if (vc->link_down) {
 571             ret = calc_iov_length(iov, iovcnt);
 572             continue;
 573         }
 574
 575         if (vc->receive_iov) {
 576             len = vc->receive_iov(vc, iov, iovcnt);
 577         } else {
 578             len = vc_sendv_compat(vc, iov, iovcnt);
 579         }
 580
 581         ret = (ret >= 0) ? ret : len;
 582     }
 583
 584     sender->vlan->delivering = 0;
 585
 586     return ret;
 587 }
 588
 589 static ssize_t qemu_enqueue_packet_iov(VLANClientState *sender,
 590                                        const struct iovec *iov, int iovcnt,
 591                                        NetPacketSent *sent_cb)
 592 {
 593     VLANPacket *packet;
 594     size_t max_len = 0;
 595     int i;
 596
 597     max_len = calc_iov_length(iov, iovcnt);
 598
 599     packet = qemu_malloc(sizeof(VLANPacket) + max_len);
 600     packet->next = sender->vlan->send_queue;
 601     packet->sender = sender;
 602     packet->sent_cb = sent_cb;
 603     packet->size = 0;
 604
 605     for (i = 0; i < iovcnt; i++) {
 606         size_t len = iov[i].iov_len;
 607
 608         memcpy(packet->data + packet->size, iov[i].iov_base, len);
 609         packet->size += len;
 610     }
 611
 612     sender->vlan->send_queue = packet;
 613
 614     return packet->size;
 615 }
 616
 617 ssize_t qemu_sendv_packet_async(VLANClientState *sender,
 618                                 const struct iovec *iov, int iovcnt,
 619                                 NetPacketSent *sent_cb)
 620 {
 621     int ret;
 622
 623     if (sender->link_down) {
 624         return calc_iov_length(iov, iovcnt);
 625     }
 626
 627     if (sender->vlan->delivering) {
 628         return qemu_enqueue_packet_iov(sender, iov, iovcnt, NULL);
 629     }
 630
 631     ret = qemu_deliver_packet_iov(sender, iov, iovcnt);
 632     if (ret == 0 && sent_cb != NULL) {
 633         qemu_enqueue_packet_iov(sender, iov, iovcnt, sent_cb);
 634         return 0;
 635     }
 636
 637     qemu_flush_queued_packets(sender);
 638
 639     return ret;
 640 }
 641
 642 ssize_t
 643 qemu_sendv_packet(VLANClientState *vc, const struct iovec *iov, int iovcnt)
 644 {
 645     return qemu_sendv_packet_async(vc, iov, iovcnt, NULL);
 646 }
 647
 648 static void config_error(Monitor *mon, const char *fmt, ...)
 649 {
 650     va_list ap;
 651
 652     va_start(ap, fmt);
 653     if (mon) {
 654         monitor_vprintf(mon, fmt, ap);
 655     } else {
 656         fprintf(stderr, "qemu: ");
 657         vfprintf(stderr, fmt, ap);
 658         exit(1);
 659     }
 660     va_end(ap);
 661 }
 662
 663 #if defined(CONFIG_SLIRP)
 664
 665 /* slirp network adapter */
 666
 667 #define SLIRP_CFG_HOSTFWD 1
 668 #define SLIRP_CFG_LEGACY  2
 669
 670 struct slirp_config_str {
 671     struct slirp_config_str *next;
 672     int flags;
 673     char str[1024];
 674     int legacy_format;
 675 };
 676
 677 typedef struct SlirpState {
 678     TAILQ_ENTRY(SlirpState) entry;
 679     VLANClientState *vc;
 680     Slirp *slirp;
 681 #ifndef _WIN32
 682     char smb_dir[128];
 683 #endif
 684 } SlirpState;
 685
 686 static struct slirp_config_str *slirp_configs;
 687 const char *legacy_tftp_prefix;
 688 const char *legacy_bootp_filename;
 689 static TAILQ_HEAD(slirp_stacks, SlirpState) slirp_stacks =
 690     TAILQ_HEAD_INITIALIZER(slirp_stacks);
 691
 692 static void slirp_hostfwd(SlirpState *s, Monitor *mon, const char *redir_str,
 693                           int legacy_format);
 694 static void slirp_guestfwd(SlirpState *s, Monitor *mon, const char *config_str,
 695                            int legacy_format);
 696
 697 #ifndef _WIN32
 698 static const char *legacy_smb_export;
 699
 700 static void slirp_smb(SlirpState *s, Monitor *mon, const char *exported_dir,
 701                       struct in_addr vserver_addr);
 702 static void slirp_smb_cleanup(SlirpState *s);
 703 #else
 704 static inline void slirp_smb_cleanup(SlirpState *s) { }
 705 #endif
 706
 707 int slirp_can_output(void *opaque)
 708 {
 709     SlirpState *s = opaque;
 710
 711     return qemu_can_send_packet(s->vc);
 712 }
 713
 714 void slirp_output(void *opaque, const uint8_t *pkt, int pkt_len)
 715 {
 716     SlirpState *s = opaque;
 717
 718 #ifdef DEBUG_SLIRP
 719     printf("slirp output:\n");
 720     hex_dump(stdout, pkt, pkt_len);
 721 #endif
 722     qemu_send_packet(s->vc, pkt, pkt_len);
 723 }
 724
 725 static ssize_t slirp_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
 726 {
 727     SlirpState *s = vc->opaque;
 728
 729 #ifdef DEBUG_SLIRP
 730     printf("slirp input:\n");
 731     hex_dump(stdout, buf, size);
 732 #endif
 733     slirp_input(s->slirp, buf, size);
 734     return size;
 735 }
 736
 737 static void net_slirp_cleanup(VLANClientState *vc)
 738 {
 739     SlirpState *s = vc->opaque;
 740
 741     slirp_cleanup(s->slirp);
 742     slirp_smb_cleanup(s);
 743     TAILQ_REMOVE(&slirp_stacks, s, entry);
 744     qemu_free(s);
 745 }
 746
 747 static int net_slirp_init(Monitor *mon, VLANState *vlan, const char *model,
 748                           const char *name, int restricted,
 749                           const char *vnetwork, const char *vhost,
 750                           const char *vhostname, const char *tftp_export,
 751                           const char *bootfile, const char *vdhcp_start,
 752                           const char *vnameserver, const char *smb_export,
 753                           const char *vsmbserver)
 754 {
 755     /* default settings according to historic slirp */
 756     struct in_addr net  = { .s_addr = htonl(0x0a000200) }; /* 10.0.2.0 */
 757     struct in_addr mask = { .s_addr = htonl(0xffffff00) }; /* 255.255.255.0 */
 758     struct in_addr host = { .s_addr = htonl(0x0a000202) }; /* 10.0.2.2 */
 759     struct in_addr dhcp = { .s_addr = htonl(0x0a00020f) }; /* 10.0.2.15 */
 760     struct in_addr dns  = { .s_addr = htonl(0x0a000203) }; /* 10.0.2.3 */
 761 #ifndef _WIN32
 762     struct in_addr smbsrv = { .s_addr = 0 };
 763 #endif
 764     SlirpState *s;
 765     char buf[20];
 766     uint32_t addr;
 767     int shift;
 768     char *end;
 769
 770     if (!tftp_export) {
 771         tftp_export = legacy_tftp_prefix;
 772     }
 773     if (!bootfile) {
 774         bootfile = legacy_bootp_filename;
 775     }
 776
 777     if (vnetwork) {
 778         if (get_str_sep(buf, sizeof(buf), &vnetwork, '/') < 0) {
 779             if (!inet_aton(vnetwork, &net)) {
 780                 return -1;
 781             }
 782             addr = ntohl(net.s_addr);
 783             if (!(addr & 0x80000000)) {
 784                 mask.s_addr = htonl(0xff000000); /* class A */
 785             } else if ((addr & 0xfff00000) == 0xac100000) {
 786                 mask.s_addr = htonl(0xfff00000); /* priv. 172.16.0.0/12 */
 787             } else if ((addr & 0xc0000000) == 0x80000000) {
 788                 mask.s_addr = htonl(0xffff0000); /* class B */
 789             } else if ((addr & 0xffff0000) == 0xc0a80000) {
 790                 mask.s_addr = htonl(0xffff0000); /* priv. 192.168.0.0/16 */
 791             } else if ((addr & 0xffff0000) == 0xc6120000) {
 792                 mask.s_addr = htonl(0xfffe0000); /* tests 198.18.0.0/15 */
 793             } else if ((addr & 0xe0000000) == 0xe0000000) {
 794                 mask.s_addr = htonl(0xffffff00); /* class C */
 795             } else {
 796                 mask.s_addr = htonl(0xfffffff0); /* multicast/reserved */
 797             }
 798         } else {
 799             if (!inet_aton(buf, &net)) {
 800                 return -1;
 801             }
 802             shift = strtol(vnetwork, &end, 10);
 803             if (*end != '\0') {
 804                 if (!inet_aton(vnetwork, &mask)) {
 805                     return -1;
 806                 }
 807             } else if (shift < 4 || shift > 32) {
 808                 return -1;
 809             } else {
 810                 mask.s_addr = htonl(0xffffffff << (32 - shift));
 811             }
 812         }
 813         net.s_addr &= mask.s_addr;
 814         host.s_addr = net.s_addr | (htonl(0x0202) & ~mask.s_addr);
 815         dhcp.s_addr = net.s_addr | (htonl(0x020f) & ~mask.s_addr);
 816         dns.s_addr  = net.s_addr | (htonl(0x0203) & ~mask.s_addr);
 817     }
 818
 819     if (vhost && !inet_aton(vhost, &host)) {
 820         return -1;
 821     }
 822     if ((host.s_addr & mask.s_addr) != net.s_addr) {
 823         return -1;
 824     }
 825
 826     if (vdhcp_start && !inet_aton(vdhcp_start, &dhcp)) {
 827         return -1;
 828     }
 829     if ((dhcp.s_addr & mask.s_addr) != net.s_addr ||
 830         dhcp.s_addr == host.s_addr || dhcp.s_addr == dns.s_addr) {
 831         return -1;
 832     }
 833
 834     if (vnameserver && !inet_aton(vnameserver, &dns)) {
 835         return -1;
 836     }
 837     if ((dns.s_addr & mask.s_addr) != net.s_addr ||
 838         dns.s_addr == host.s_addr) {
 839         return -1;
 840     }
 841
 842 #ifndef _WIN32
 843     if (vsmbserver && !inet_aton(vsmbserver, &smbsrv)) {
 844         return -1;
 845     }
 846 #endif
 847
 848     s = qemu_mallocz(sizeof(SlirpState));
 849     s->slirp = slirp_init(restricted, net, mask, host, vhostname,
 850                           tftp_export, bootfile, dhcp, dns, s);
 851     TAILQ_INSERT_TAIL(&slirp_stacks, s, entry);
 852
 853     while (slirp_configs) {
 854         struct slirp_config_str *config = slirp_configs;
 855
 856         if (config->flags & SLIRP_CFG_HOSTFWD) {
 857             slirp_hostfwd(s, mon, config->str,
 858                           config->flags & SLIRP_CFG_LEGACY);
 859         } else {
 860             slirp_guestfwd(s, mon, config->str,
 861                            config->flags & SLIRP_CFG_LEGACY);
 862         }
 863         slirp_configs = config->next;
 864         qemu_free(config);
 865     }
 866 #ifndef _WIN32
 867     if (!smb_export) {
 868         smb_export = legacy_smb_export;
 869     }
 870     if (smb_export) {
 871         slirp_smb(s, mon, smb_export, smbsrv);
 872     }
 873 #endif
 874
 875     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, slirp_receive, NULL,
 876                                  net_slirp_cleanup, s);
 877     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
 878              "net=%s, restricted=%c", inet_ntoa(net), restricted ? 'y' : 'n');
 879     return 0;
 880 }
 881
 882 static SlirpState *slirp_lookup(Monitor *mon, const char *vlan,
 883                                 const char *stack)
 884 {
 885     VLANClientState *vc;
 886
 887     if (vlan) {
 888         vc = qemu_find_vlan_client_by_name(mon, strtol(vlan, NULL, 0), stack);
 889         if (!vc) {
 890             return NULL;
 891         }
 892         if (strcmp(vc->model, "user")) {
 893             monitor_printf(mon, "invalid device specified\n");
 894             return NULL;
 895         }
 896         return vc->opaque;
 897     } else {
 898         if (TAILQ_EMPTY(&slirp_stacks)) {
 899             monitor_printf(mon, "user mode network stack not in use\n");
 900             return NULL;
 901         }
 902         return TAILQ_FIRST(&slirp_stacks);
 903     }
 904 }
 905
 906 void net_slirp_hostfwd_remove(Monitor *mon, const char *arg1,
 907                               const char *arg2, const char *arg3)
 908 {
 909     struct in_addr host_addr = { .s_addr = INADDR_ANY };
 910     int host_port;
 911     char buf[256] = "";
 912     const char *src_str, *p;
 913     SlirpState *s;
 914     int is_udp = 0;
 915     int err;
 916
 917     if (arg2) {
 918         s = slirp_lookup(mon, arg1, arg2);
 919         src_str = arg3;
 920     } else {
 921         s = slirp_lookup(mon, NULL, NULL);
 922         src_str = arg1;
 923     }
 924     if (!s) {
 925         return;
 926     }
 927
 928     if (!src_str || !src_str[0])
 929         goto fail_syntax;
 930
 931     p = src_str;
 932     get_str_sep(buf, sizeof(buf), &p, ':');
 933
 934     if (!strcmp(buf, "tcp") || buf[0] == '\0') {
 935         is_udp = 0;
 936     } else if (!strcmp(buf, "udp")) {
 937         is_udp = 1;
 938     } else {
 939         goto fail_syntax;
 940     }
 941
 942     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 943         goto fail_syntax;
 944     }
 945     if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
 946         goto fail_syntax;
 947     }
 948
 949     host_port = atoi(p);
 950
 951     err = slirp_remove_hostfwd(TAILQ_FIRST(&slirp_stacks)->slirp, is_udp,
 952                                host_addr, host_port);
 953
 954     monitor_printf(mon, "host forwarding rule for %s %s\n", src_str,
 955                    err ? "removed" : "not found");
 956     return;
 957
 958  fail_syntax:
 959     monitor_printf(mon, "invalid format\n");
 960 }
 961
 962 static void slirp_hostfwd(SlirpState *s, Monitor *mon, const char *redir_str,
 963                           int legacy_format)
 964 {
 965     struct in_addr host_addr = { .s_addr = INADDR_ANY };
 966     struct in_addr guest_addr = { .s_addr = 0 };
 967     int host_port, guest_port;
 968     const char *p;
 969     char buf[256];
 970     int is_udp;
 971     char *end;
 972
 973     p = redir_str;
 974     if (!p || get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 975         goto fail_syntax;
 976     }
 977     if (!strcmp(buf, "tcp") || buf[0] == '\0') {
 978         is_udp = 0;
 979     } else if (!strcmp(buf, "udp")) {
 980         is_udp = 1;
 981     } else {
 982         goto fail_syntax;
 983     }
 984
 985     if (!legacy_format) {
 986         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
 987             goto fail_syntax;
 988         }
 989         if (buf[0] != '\0' && !inet_aton(buf, &host_addr)) {
 990             goto fail_syntax;
 991         }
 992     }
 993
 994     if (get_str_sep(buf, sizeof(buf), &p, legacy_format ? ':' : '-') < 0) {
 995         goto fail_syntax;
 996     }
 997     host_port = strtol(buf, &end, 0);
 998     if (*end != '\0' || host_port < 1 || host_port > 65535) {
 999         goto fail_syntax;
1000     }
1001
1002     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1003         goto fail_syntax;
1004     }
1005     if (buf[0] != '\0' && !inet_aton(buf, &guest_addr)) {
1006         goto fail_syntax;
1007     }
1008
1009     guest_port = strtol(p, &end, 0);
1010     if (*end != '\0' || guest_port < 1 || guest_port > 65535) {
1011         goto fail_syntax;
1012     }
1013
1014     if (slirp_add_hostfwd(s->slirp, is_udp, host_addr, host_port, guest_addr,
1015                           guest_port) < 0) {
1016         config_error(mon, "could not set up host forwarding rule '%s'\n",
1017                      redir_str);
1018     }
1019     return;
1020
1021  fail_syntax:
1022     config_error(mon, "invalid host forwarding rule '%s'\n", redir_str);
1023 }
1024
1025 void net_slirp_hostfwd_add(Monitor *mon, const char *arg1,
1026                            const char *arg2, const char *arg3)
1027 {
1028     const char *redir_str;
1029     SlirpState *s;
1030
1031     if (arg2) {
1032         s = slirp_lookup(mon, arg1, arg2);
1033         redir_str = arg3;
1034     } else {
1035         s = slirp_lookup(mon, NULL, NULL);
1036         redir_str = arg1;
1037     }
1038     if (s) {
1039         slirp_hostfwd(s, mon, redir_str, 0);
1040     }
1041
1042 }
1043
1044 void net_slirp_redir(const char *redir_str)
1045 {
1046     struct slirp_config_str *config;
1047
1048     if (TAILQ_EMPTY(&slirp_stacks)) {
1049         config = qemu_malloc(sizeof(*config));
1050         pstrcpy(config->str, sizeof(config->str), redir_str);
1051         config->flags = SLIRP_CFG_HOSTFWD | SLIRP_CFG_LEGACY;
1052         config->next = slirp_configs;
1053         slirp_configs = config;
1054         return;
1055     }
1056
1057     slirp_hostfwd(TAILQ_FIRST(&slirp_stacks), NULL, redir_str, 1);
1058 }
1059
1060 #ifndef _WIN32
1061
1062 /* automatic user mode samba server configuration */
1063 static void slirp_smb_cleanup(SlirpState *s)
1064 {
1065     char cmd[128];
1066
1067     if (s->smb_dir[0] != '\0') {
1068         snprintf(cmd, sizeof(cmd), "rm -rf %s", s->smb_dir);
1069         system(cmd);
1070         s->smb_dir[0] = '\0';
1071     }
1072 }
1073
1074 static void slirp_smb(SlirpState* s, Monitor *mon, const char *exported_dir,
1075                       struct in_addr vserver_addr)
1076 {
1077     static int instance;
1078     char smb_conf[128];
1079     char smb_cmdline[128];
1080     FILE *f;
1081
1082     snprintf(s->smb_dir, sizeof(s->smb_dir), "/tmp/qemu-smb.%ld-%d",
1083              (long)getpid(), instance++);
1084     if (mkdir(s->smb_dir, 0700) < 0) {
1085         config_error(mon, "could not create samba server dir '%s'\n",
1086                      s->smb_dir);
1087         return;
1088     }
1089     snprintf(smb_conf, sizeof(smb_conf), "%s/%s", s->smb_dir, "smb.conf");
1090
1091     f = fopen(smb_conf, "w");
1092     if (!f) {
1093         slirp_smb_cleanup(s);
1094         config_error(mon, "could not create samba server "
1095                      "configuration file '%s'\n", smb_conf);
1096         return;
1097     }
1098     fprintf(f,
1099             "[global]\n"
1100             "private dir=%s\n"
1101             "smb ports=0\n"
1102             "socket address=127.0.0.1\n"
1103             "pid directory=%s\n"
1104             "lock directory=%s\n"
1105             "log file=%s/log.smbd\n"
1106             "smb passwd file=%s/smbpasswd\n"
1107             "security = share\n"
1108             "[qemu]\n"
1109             "path=%s\n"
1110             "read only=no\n"
1111             "guest ok=yes\n",
1112             s->smb_dir,
1113             s->smb_dir,
1114             s->smb_dir,
1115             s->smb_dir,
1116             s->smb_dir,
1117             exported_dir
1118             );
1119     fclose(f);
1120
1121     snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -s %s",
1122              SMBD_COMMAND, smb_conf);
1123
1124     if (slirp_add_exec(s->slirp, 0, smb_cmdline, &vserver_addr, 139) < 0) {
1125         slirp_smb_cleanup(s);
1126         config_error(mon, "conflicting/invalid smbserver address\n");
1127     }
1128 }
1129
1130 /* automatic user mode samba server configuration (legacy interface) */
1131 void net_slirp_smb(const char *exported_dir)
1132 {
1133     struct in_addr vserver_addr = { .s_addr = 0 };
1134
1135     if (legacy_smb_export) {
1136         fprintf(stderr, "-smb given twice\n");
1137         exit(1);
1138     }
1139     legacy_smb_export = exported_dir;
1140     if (!TAILQ_EMPTY(&slirp_stacks)) {
1141         slirp_smb(TAILQ_FIRST(&slirp_stacks), NULL, exported_dir,
1142                   vserver_addr);
1143     }
1144 }
1145
1146 #endif /* !defined(_WIN32) */
1147
1148 struct GuestFwd {
1149     CharDriverState *hd;
1150     struct in_addr server;
1151     int port;
1152     Slirp *slirp;
1153 };
1154
1155 static int guestfwd_can_read(void *opaque)
1156 {
1157     struct GuestFwd *fwd = opaque;
1158     return slirp_socket_can_recv(fwd->slirp, fwd->server, fwd->port);
1159 }
1160
1161 static void guestfwd_read(void *opaque, const uint8_t *buf, int size)
1162 {
1163     struct GuestFwd *fwd = opaque;
1164     slirp_socket_recv(fwd->slirp, fwd->server, fwd->port, buf, size);
1165 }
1166
1167 static void slirp_guestfwd(SlirpState *s, Monitor *mon, const char *config_str,
1168                            int legacy_format)
1169 {
1170     struct in_addr server = { .s_addr = 0 };
1171     struct GuestFwd *fwd;
1172     const char *p;
1173     char buf[128];
1174     char *end;
1175     int port;
1176
1177     p = config_str;
1178     if (legacy_format) {
1179         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1180             goto fail_syntax;
1181         }
1182     } else {
1183         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1184             goto fail_syntax;
1185         }
1186         if (strcmp(buf, "tcp") && buf[0] != '\0') {
1187             goto fail_syntax;
1188         }
1189         if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) {
1190             goto fail_syntax;
1191         }
1192         if (buf[0] != '\0' && !inet_aton(buf, &server)) {
1193             goto fail_syntax;
1194         }
1195         if (get_str_sep(buf, sizeof(buf), &p, '-') < 0) {
1196             goto fail_syntax;
1197         }
1198     }
1199     port = strtol(buf, &end, 10);
1200     if (*end != '\0' || port < 1 || port > 65535) {
1201         goto fail_syntax;
1202     }
1203
1204     fwd = qemu_malloc(sizeof(struct GuestFwd));
1205     snprintf(buf, sizeof(buf), "guestfwd.tcp:%d", port);
1206     fwd->hd = qemu_chr_open(buf, p, NULL);
1207     if (!fwd->hd) {
1208         config_error(mon, "could not open guest forwarding device '%s'\n",
1209                      buf);
1210         qemu_free(fwd);
1211         return;
1212     }
1213
1214     if (slirp_add_exec(s->slirp, 3, fwd->hd, &server, port) < 0) {
1215         config_error(mon, "conflicting/invalid host:port in guest forwarding "
1216                      "rule '%s'\n", config_str);
1217         qemu_free(fwd);
1218         return;
1219     }
1220     fwd->server = server;
1221     fwd->port = port;
1222     fwd->slirp = s->slirp;
1223
1224     qemu_chr_add_handlers(fwd->hd, guestfwd_can_read, guestfwd_read,
1225                           NULL, fwd);
1226     return;
1227
1228  fail_syntax:
1229     config_error(mon, "invalid guest forwarding rule '%s'\n", config_str);
1230 }
1231
1232 void do_info_usernet(Monitor *mon)
1233 {
1234     SlirpState *s;
1235
1236     TAILQ_FOREACH(s, &slirp_stacks, entry) {
1237         monitor_printf(mon, "VLAN %d (%s):\n", s->vc->vlan->id, s->vc->name);
1238         slirp_connection_info(s->slirp, mon);
1239     }
1240 }
1241
1242 #endif /* CONFIG_SLIRP */
1243
1244 #if !defined(_WIN32)
1245
1246 typedef struct TAPState {
1247     VLANClientState *vc;
1248     int fd;
1249     char down_script[1024];
1250     char down_script_arg[128];
1251     uint8_t buf[4096];
1252     unsigned int read_poll : 1;
1253     unsigned int write_poll : 1;
1254 } TAPState;
1255
1256 static int launch_script(const char *setup_script, const char *ifname, int fd);
1257
1258 static int tap_can_send(void *opaque);
1259 static void tap_send(void *opaque);
1260 static void tap_writable(void *opaque);
1261
1262 static void tap_update_fd_handler(TAPState *s)
1263 {
1264     qemu_set_fd_handler2(s->fd,
1265                          s->read_poll  ? tap_can_send : NULL,
1266                          s->read_poll  ? tap_send     : NULL,
1267                          s->write_poll ? tap_writable : NULL,
1268                          s);
1269 }
1270
1271 static void tap_read_poll(TAPState *s, int enable)
1272 {
1273     s->read_poll = !!enable;
1274     tap_update_fd_handler(s);
1275 }
1276
1277 static void tap_write_poll(TAPState *s, int enable)
1278 {
1279     s->write_poll = !!enable;
1280     tap_update_fd_handler(s);
1281 }
1282
1283 static void tap_writable(void *opaque)
1284 {
1285     TAPState *s = opaque;
1286
1287     tap_write_poll(s, 0);
1288
1289     qemu_flush_queued_packets(s->vc);
1290 }
1291
1292 static ssize_t tap_receive_iov(VLANClientState *vc, const struct iovec *iov,
1293                                int iovcnt)
1294 {
1295     TAPState *s = vc->opaque;
1296     ssize_t len;
1297
1298     do {
1299         len = writev(s->fd, iov, iovcnt);
1300     } while (len == -1 && errno == EINTR);
1301
1302     if (len == -1 && errno == EAGAIN) {
1303         tap_write_poll(s, 1);
1304         return 0;
1305     }
1306
1307     return len;
1308 }
1309
1310 static ssize_t tap_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1311 {
1312     TAPState *s = vc->opaque;
1313     ssize_t len;
1314
1315     do {
1316         len = write(s->fd, buf, size);
1317     } while (len == -1 && (errno == EINTR || errno == EAGAIN));
1318
1319     return len;
1320 }
1321
1322 static int tap_can_send(void *opaque)
1323 {
1324     TAPState *s = opaque;
1325
1326     return qemu_can_send_packet(s->vc);
1327 }
1328
1329 #ifdef __sun__
1330 static ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
1331 {
1332     struct strbuf sbuf;
1333     int f = 0;
1334
1335     sbuf.maxlen = maxlen;
1336     sbuf.buf = (char *)buf;
1337
1338     return getmsg(tapfd, NULL, &sbuf, &f) >= 0 ? sbuf.len : -1;
1339 }
1340 #else
1341 static ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen)
1342 {
1343     return read(tapfd, buf, maxlen);
1344 }
1345 #endif
1346
1347 static void tap_send_completed(VLANClientState *vc, ssize_t len)
1348 {
1349     TAPState *s = vc->opaque;
1350     tap_read_poll(s, 1);
1351 }
1352
1353 static void tap_send(void *opaque)
1354 {
1355     TAPState *s = opaque;
1356     int size;
1357
1358     do {
1359         size = tap_read_packet(s->fd, s->buf, sizeof(s->buf));
1360         if (size <= 0) {
1361             break;
1362         }
1363
1364         size = qemu_send_packet_async(s->vc, s->buf, size, tap_send_completed);
1365         if (size == 0) {
1366             tap_read_poll(s, 0);
1367         }
1368     } while (size > 0);
1369 }
1370
1371 #ifdef TUNSETSNDBUF
1372 /* sndbuf should be set to a value lower than the tx queue
1373  * capacity of any destination network interface.
1374  * Ethernet NICs generally have txqueuelen=1000, so 1Mb is
1375  * a good default, given a 1500 byte MTU.
1376  */
1377 #define TAP_DEFAULT_SNDBUF 1024*1024
1378
1379 static void tap_set_sndbuf(TAPState *s, const char *sndbuf_str, Monitor *mon)
1380 {
1381     int sndbuf = TAP_DEFAULT_SNDBUF;
1382
1383     if (sndbuf_str) {
1384         sndbuf = atoi(sndbuf_str);
1385     }
1386
1387     if (!sndbuf) {
1388         sndbuf = INT_MAX;
1389     }
1390
1391     if (ioctl(s->fd, TUNSETSNDBUF, &sndbuf) == -1 && sndbuf_str) {
1392         config_error(mon, "TUNSETSNDBUF ioctl failed: %s\n",
1393                      strerror(errno));
1394     }
1395 }
1396 #else
1397 static void tap_set_sndbuf(TAPState *s, const char *sndbuf_str, Monitor *mon)
1398 {
1399     if (sndbuf_str) {
1400         config_error(mon, "No '-net tap,sndbuf=<nbytes>' support available\n");
1401     }
1402 }
1403 #endif /* TUNSETSNDBUF */
1404
1405 static void tap_cleanup(VLANClientState *vc)
1406 {
1407     TAPState *s = vc->opaque;
1408
1409     qemu_purge_queued_packets(vc);
1410
1411     if (s->down_script[0])
1412         launch_script(s->down_script, s->down_script_arg, s->fd);
1413
1414     tap_read_poll(s, 0);
1415     tap_write_poll(s, 0);
1416     close(s->fd);
1417     qemu_free(s);
1418 }
1419
1420 /* fd support */
1421
1422 static TAPState *net_tap_fd_init(VLANState *vlan,
1423                                  const char *model,
1424                                  const char *name,
1425                                  int fd)
1426 {
1427     TAPState *s;
1428
1429     s = qemu_mallocz(sizeof(TAPState));
1430     s->fd = fd;
1431     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, tap_receive,
1432                                  tap_receive_iov, tap_cleanup, s);
1433     tap_read_poll(s, 1);
1434     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "fd=%d", fd);
1435     return s;
1436 }
1437
1438 #if defined (CONFIG_BSD) || defined (__FreeBSD_kernel__)
1439 static int tap_open(char *ifname, int ifname_size)
1440 {
1441     int fd;
1442     char *dev;
1443     struct stat s;
1444
1445     TFR(fd = open("/dev/tap", O_RDWR));
1446     if (fd < 0) {
1447         fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n");
1448         return -1;
1449     }
1450
1451     fstat(fd, &s);
1452     dev = devname(s.st_rdev, S_IFCHR);
1453     pstrcpy(ifname, ifname_size, dev);
1454
1455     fcntl(fd, F_SETFL, O_NONBLOCK);
1456     return fd;
1457 }
1458 #elif defined(__sun__)
1459 #define TUNNEWPPA       (('T'<<16) | 0x0001)
1460 /*
1461  * Allocate TAP device, returns opened fd.
1462  * Stores dev name in the first arg(must be large enough).
1463  */
1464 static int tap_alloc(char *dev, size_t dev_size)
1465 {
1466     int tap_fd, if_fd, ppa = -1;
1467     static int ip_fd = 0;
1468     char *ptr;
1469
1470     static int arp_fd = 0;
1471     int ip_muxid, arp_muxid;
1472     struct strioctl  strioc_if, strioc_ppa;
1473     int link_type = I_PLINK;;
1474     struct lifreq ifr;
1475     char actual_name[32] = "";
1476
1477     memset(&ifr, 0x0, sizeof(ifr));
1478
1479     if( *dev ){
1480        ptr = dev;
1481        while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
1482        ppa = atoi(ptr);
1483     }
1484
1485     /* Check if IP device was opened */
1486     if( ip_fd )
1487        close(ip_fd);
1488
1489     TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
1490     if (ip_fd < 0) {
1491        syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)");
1492        return -1;
1493     }
1494
1495     TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
1496     if (tap_fd < 0) {
1497        syslog(LOG_ERR, "Can't open /dev/tap");
1498        return -1;
1499     }
1500
1501     /* Assign a new PPA and get its unit number. */
1502     strioc_ppa.ic_cmd = TUNNEWPPA;
1503     strioc_ppa.ic_timout = 0;
1504     strioc_ppa.ic_len = sizeof(ppa);
1505     strioc_ppa.ic_dp = (char *)&ppa;
1506     if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
1507        syslog (LOG_ERR, "Can't assign new interface");
1508
1509     TFR(if_fd = open("/dev/tap", O_RDWR, 0));
1510     if (if_fd < 0) {
1511        syslog(LOG_ERR, "Can't open /dev/tap (2)");
1512        return -1;
1513     }
1514     if(ioctl(if_fd, I_PUSH, "ip") < 0){
1515        syslog(LOG_ERR, "Can't push IP module");
1516        return -1;
1517     }
1518
1519     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
1520         syslog(LOG_ERR, "Can't get flags\n");
1521
1522     snprintf (actual_name, 32, "tap%d", ppa);
1523     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
1524
1525     ifr.lifr_ppa = ppa;
1526     /* Assign ppa according to the unit number returned by tun device */
1527
1528     if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
1529         syslog (LOG_ERR, "Can't set PPA %d", ppa);
1530     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
1531         syslog (LOG_ERR, "Can't get flags\n");
1532     /* Push arp module to if_fd */
1533     if (ioctl (if_fd, I_PUSH, "arp") < 0)
1534         syslog (LOG_ERR, "Can't push ARP module (2)");
1535
1536     /* Push arp module to ip_fd */
1537     if (ioctl (ip_fd, I_POP, NULL) < 0)
1538         syslog (LOG_ERR, "I_POP failed\n");
1539     if (ioctl (ip_fd, I_PUSH, "arp") < 0)
1540         syslog (LOG_ERR, "Can't push ARP module (3)\n");
1541     /* Open arp_fd */
1542     TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
1543     if (arp_fd < 0)
1544        syslog (LOG_ERR, "Can't open %s\n", "/dev/tap");
1545
1546     /* Set ifname to arp */
1547     strioc_if.ic_cmd = SIOCSLIFNAME;
1548     strioc_if.ic_timout = 0;
1549     strioc_if.ic_len = sizeof(ifr);
1550     strioc_if.ic_dp = (char *)&ifr;
1551     if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
1552         syslog (LOG_ERR, "Can't set ifname to arp\n");
1553     }
1554
1555     if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
1556        syslog(LOG_ERR, "Can't link TAP device to IP");
1557        return -1;
1558     }
1559
1560     if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
1561         syslog (LOG_ERR, "Can't link TAP device to ARP");
1562
1563     close (if_fd);
1564
1565     memset(&ifr, 0x0, sizeof(ifr));
1566     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
1567     ifr.lifr_ip_muxid  = ip_muxid;
1568     ifr.lifr_arp_muxid = arp_muxid;
1569
1570     if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
1571     {
1572       ioctl (ip_fd, I_PUNLINK , arp_muxid);
1573       ioctl (ip_fd, I_PUNLINK, ip_muxid);
1574       syslog (LOG_ERR, "Can't set multiplexor id");
1575     }
1576
1577     snprintf(dev, dev_size, "tap%d", ppa);
1578     return tap_fd;
1579 }
1580
1581 static int tap_open(char *ifname, int ifname_size)
1582 {
1583     char  dev[10]="";
1584     int fd;
1585     if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){
1586        fprintf(stderr, "Cannot allocate TAP device\n");
1587        return -1;
1588     }
1589     pstrcpy(ifname, ifname_size, dev);
1590     fcntl(fd, F_SETFL, O_NONBLOCK);
1591     return fd;
1592 }
1593 #elif defined (_AIX)
1594 static int tap_open(char *ifname, int ifname_size)
1595 {
1596     fprintf (stderr, "no tap on AIX\n");
1597     return -1;
1598 }
1599 #else
1600 static int tap_open(char *ifname, int ifname_size)
1601 {
1602     struct ifreq ifr;
1603     int fd, ret;
1604
1605     TFR(fd = open("/dev/net/tun", O_RDWR));
1606     if (fd < 0) {
1607         fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n");
1608         return -1;
1609     }
1610     memset(&ifr, 0, sizeof(ifr));
1611     ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
1612     if (ifname[0] != '\0')
1613         pstrcpy(ifr.ifr_name, IFNAMSIZ, ifname);
1614     else
1615         pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d");
1616     ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
1617     if (ret != 0) {
1618         fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n");
1619         close(fd);
1620         return -1;
1621     }
1622     pstrcpy(ifname, ifname_size, ifr.ifr_name);
1623     fcntl(fd, F_SETFL, O_NONBLOCK);
1624     return fd;
1625 }
1626 #endif
1627
1628 static int launch_script(const char *setup_script, const char *ifname, int fd)
1629 {
1630     sigset_t oldmask, mask;
1631     int pid, status;
1632     char *args[3];
1633     char **parg;
1634
1635     sigemptyset(&mask);
1636     sigaddset(&mask, SIGCHLD);
1637     sigprocmask(SIG_BLOCK, &mask, &oldmask);
1638
1639     /* try to launch network script */
1640     pid = fork();
1641     if (pid == 0) {
1642         int open_max = sysconf(_SC_OPEN_MAX), i;
1643
1644         for (i = 0; i < open_max; i++) {
1645             if (i != STDIN_FILENO &&
1646                 i != STDOUT_FILENO &&
1647                 i != STDERR_FILENO &&
1648                 i != fd) {
1649                 close(i);
1650             }
1651         }
1652         parg = args;
1653         *parg++ = (char *)setup_script;
1654         *parg++ = (char *)ifname;
1655         *parg++ = NULL;
1656         execv(setup_script, args);
1657         _exit(1);
1658     } else if (pid > 0) {
1659         while (waitpid(pid, &status, 0) != pid) {
1660             /* loop */
1661         }
1662         sigprocmask(SIG_SETMASK, &oldmask, NULL);
1663
1664         if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
1665             return 0;
1666         }
1667     }
1668     fprintf(stderr, "%s: could not launch network script\n", setup_script);
1669     return -1;
1670 }
1671
1672 static TAPState *net_tap_init(VLANState *vlan, const char *model,
1673                               const char *name, const char *ifname1,
1674                               const char *setup_script, const char *down_script)
1675 {
1676     TAPState *s;
1677     int fd;
1678     char ifname[128];
1679
1680     if (ifname1 != NULL)
1681         pstrcpy(ifname, sizeof(ifname), ifname1);
1682     else
1683         ifname[0] = '\0';
1684     TFR(fd = tap_open(ifname, sizeof(ifname)));
1685     if (fd < 0)
1686         return NULL;
1687
1688     if (!setup_script || !strcmp(setup_script, "no"))
1689         setup_script = "";
1690     if (setup_script[0] != '\0' &&
1691         launch_script(setup_script, ifname, fd)) {
1692         return NULL;
1693     }
1694     s = net_tap_fd_init(vlan, model, name, fd);
1695     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1696              "ifname=%s,script=%s,downscript=%s",
1697              ifname, setup_script, down_script);
1698     if (down_script && strcmp(down_script, "no")) {
1699         snprintf(s->down_script, sizeof(s->down_script), "%s", down_script);
1700         snprintf(s->down_script_arg, sizeof(s->down_script_arg), "%s", ifname);
1701     }
1702     return s;
1703 }
1704
1705 #endif /* !_WIN32 */
1706
1707 #if defined(CONFIG_VDE)
1708 typedef struct VDEState {
1709     VLANClientState *vc;
1710     VDECONN *vde;
1711 } VDEState;
1712
1713 static void vde_to_qemu(void *opaque)
1714 {
1715     VDEState *s = opaque;
1716     uint8_t buf[4096];
1717     int size;
1718
1719     size = vde_recv(s->vde, (char *)buf, sizeof(buf), 0);
1720     if (size > 0) {
1721         qemu_send_packet(s->vc, buf, size);
1722     }
1723 }
1724
1725 static ssize_t vde_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1726 {
1727     VDEState *s = vc->opaque;
1728     ssize_t ret;
1729
1730     do {
1731       ret = vde_send(s->vde, (const char *)buf, size, 0);
1732     } while (ret < 0 && errno == EINTR);
1733
1734     return ret;
1735 }
1736
1737 static void vde_cleanup(VLANClientState *vc)
1738 {
1739     VDEState *s = vc->opaque;
1740     qemu_set_fd_handler(vde_datafd(s->vde), NULL, NULL, NULL);
1741     vde_close(s->vde);
1742     qemu_free(s);
1743 }
1744
1745 static int net_vde_init(VLANState *vlan, const char *model,
1746                         const char *name, const char *sock,
1747                         int port, const char *group, int mode)
1748 {
1749     VDEState *s;
1750     char *init_group = strlen(group) ? (char *)group : NULL;
1751     char *init_sock = strlen(sock) ? (char *)sock : NULL;
1752
1753     struct vde_open_args args = {
1754         .port = port,
1755         .group = init_group,
1756         .mode = mode,
1757     };
1758
1759     s = qemu_mallocz(sizeof(VDEState));
1760     s->vde = vde_open(init_sock, (char *)"QEMU", &args);
1761     if (!s->vde){
1762         free(s);
1763         return -1;
1764     }
1765     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, vde_receive,
1766                                  NULL, vde_cleanup, s);
1767     qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
1768     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "sock=%s,fd=%d",
1769              sock, vde_datafd(s->vde));
1770     return 0;
1771 }
1772 #endif
1773
1774 /* network connection */
1775 typedef struct NetSocketState {
1776     VLANClientState *vc;
1777     int fd;
1778     int state; /* 0 = getting length, 1 = getting data */
1779     unsigned int index;
1780     unsigned int packet_len;
1781     uint8_t buf[4096];
1782     struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
1783 } NetSocketState;
1784
1785 typedef struct NetSocketListenState {
1786     VLANState *vlan;
1787     char *model;
1788     char *name;
1789     int fd;
1790 } NetSocketListenState;
1791
1792 /* XXX: we consider we can send the whole packet without blocking */
1793 static ssize_t net_socket_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
1794 {
1795     NetSocketState *s = vc->opaque;
1796     uint32_t len;
1797     len = htonl(size);
1798
1799     send_all(s->fd, (const uint8_t *)&len, sizeof(len));
1800     return send_all(s->fd, buf, size);
1801 }
1802
1803 static ssize_t net_socket_receive_dgram(VLANClientState *vc, const uint8_t *buf, size_t size)
1804 {
1805     NetSocketState *s = vc->opaque;
1806
1807     return sendto(s->fd, (const void *)buf, size, 0,
1808                   (struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst));
1809 }
1810
1811 static void net_socket_send(void *opaque)
1812 {
1813     NetSocketState *s = opaque;
1814     int size, err;
1815     unsigned l;
1816     uint8_t buf1[4096];
1817     const uint8_t *buf;
1818
1819     size = recv(s->fd, (void *)buf1, sizeof(buf1), 0);
1820     if (size < 0) {
1821         err = socket_error();
1822         if (err != EWOULDBLOCK)
1823             goto eoc;
1824     } else if (size == 0) {
1825         /* end of connection */
1826     eoc:
1827         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1828         closesocket(s->fd);
1829         return;
1830     }
1831     buf = buf1;
1832     while (size > 0) {
1833         /* reassemble a packet from the network */
1834         switch(s->state) {
1835         case 0:
1836             l = 4 - s->index;
1837             if (l > size)
1838                 l = size;
1839             memcpy(s->buf + s->index, buf, l);
1840             buf += l;
1841             size -= l;
1842             s->index += l;
1843             if (s->index == 4) {
1844                 /* got length */
1845                 s->packet_len = ntohl(*(uint32_t *)s->buf);
1846                 s->index = 0;
1847                 s->state = 1;
1848             }
1849             break;
1850         case 1:
1851             l = s->packet_len - s->index;
1852             if (l > size)
1853                 l = size;
1854             if (s->index + l <= sizeof(s->buf)) {
1855                 memcpy(s->buf + s->index, buf, l);
1856             } else {
1857                 fprintf(stderr, "serious error: oversized packet received,"
1858                     "connection terminated.\n");
1859                 s->state = 0;
1860                 goto eoc;
1861             }
1862
1863             s->index += l;
1864             buf += l;
1865             size -= l;
1866             if (s->index >= s->packet_len) {
1867                 qemu_send_packet(s->vc, s->buf, s->packet_len);
1868                 s->index = 0;
1869                 s->state = 0;
1870             }
1871             break;
1872         }
1873     }
1874 }
1875
1876 static void net_socket_send_dgram(void *opaque)
1877 {
1878     NetSocketState *s = opaque;
1879     int size;
1880
1881     size = recv(s->fd, (void *)s->buf, sizeof(s->buf), 0);
1882     if (size < 0)
1883         return;
1884     if (size == 0) {
1885         /* end of connection */
1886         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1887         return;
1888     }
1889     qemu_send_packet(s->vc, s->buf, size);
1890 }
1891
1892 static int net_socket_mcast_create(struct sockaddr_in *mcastaddr)
1893 {
1894     struct ip_mreq imr;
1895     int fd;
1896     int val, ret;
1897     if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
1898         fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n",
1899                 inet_ntoa(mcastaddr->sin_addr),
1900                 (int)ntohl(mcastaddr->sin_addr.s_addr));
1901         return -1;
1902
1903     }
1904     fd = socket(PF_INET, SOCK_DGRAM, 0);
1905     if (fd < 0) {
1906         perror("socket(PF_INET, SOCK_DGRAM)");
1907         return -1;
1908     }
1909
1910     val = 1;
1911     ret=setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
1912                    (const char *)&val, sizeof(val));
1913     if (ret < 0) {
1914         perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
1915         goto fail;
1916     }
1917
1918     ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
1919     if (ret < 0) {
1920         perror("bind");
1921         goto fail;
1922     }
1923
1924     /* Add host to multicast group */
1925     imr.imr_multiaddr = mcastaddr->sin_addr;
1926     imr.imr_interface.s_addr = htonl(INADDR_ANY);
1927
1928     ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1929                      (const char *)&imr, sizeof(struct ip_mreq));
1930     if (ret < 0) {
1931         perror("setsockopt(IP_ADD_MEMBERSHIP)");
1932         goto fail;
1933     }
1934
1935     /* Force mcast msgs to loopback (eg. several QEMUs in same host */
1936     val = 1;
1937     ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1938                    (const char *)&val, sizeof(val));
1939     if (ret < 0) {
1940         perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
1941         goto fail;
1942     }
1943
1944     socket_set_nonblock(fd);
1945     return fd;
1946 fail:
1947     if (fd >= 0)
1948         closesocket(fd);
1949     return -1;
1950 }
1951
1952 static void net_socket_cleanup(VLANClientState *vc)
1953 {
1954     NetSocketState *s = vc->opaque;
1955     qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1956     close(s->fd);
1957     qemu_free(s);
1958 }
1959
1960 static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
1961                                                 const char *model,
1962                                                 const char *name,
1963                                                 int fd, int is_connected)
1964 {
1965     struct sockaddr_in saddr;
1966     int newfd;
1967     socklen_t saddr_len;
1968     NetSocketState *s;
1969
1970     /* fd passed: multicast: "learn" dgram_dst address from bound address and save it
1971      * Because this may be "shared" socket from a "master" process, datagrams would be recv()
1972      * by ONLY ONE process: we must "clone" this dgram socket --jjo
1973      */
1974
1975     if (is_connected) {
1976         if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
1977             /* must be bound */
1978             if (saddr.sin_addr.s_addr==0) {
1979                 fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, cannot setup multicast dst addr\n",
1980                         fd);
1981                 return NULL;
1982             }
1983             /* clone dgram socket */
1984             newfd = net_socket_mcast_create(&saddr);
1985             if (newfd < 0) {
1986                 /* error already reported by net_socket_mcast_create() */
1987                 close(fd);
1988                 return NULL;
1989             }
1990             /* clone newfd to fd, close newfd */
1991             dup2(newfd, fd);
1992             close(newfd);
1993
1994         } else {
1995             fprintf(stderr, "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
1996                     fd, strerror(errno));
1997             return NULL;
1998         }
1999     }
2000
2001     s = qemu_mallocz(sizeof(NetSocketState));
2002     s->fd = fd;
2003
2004     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, net_socket_receive_dgram,
2005                                  NULL, net_socket_cleanup, s);
2006     qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s);
2007
2008     /* mcast: save bound address as dst */
2009     if (is_connected) s->dgram_dst=saddr;
2010
2011     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2012             "socket: fd=%d (%s mcast=%s:%d)",
2013             fd, is_connected? "cloned" : "",
2014             inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2015     return s;
2016 }
2017
2018 static void net_socket_connect(void *opaque)
2019 {
2020     NetSocketState *s = opaque;
2021     qemu_set_fd_handler(s->fd, net_socket_send, NULL, s);
2022 }
2023
2024 static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
2025                                                  const char *model,
2026                                                  const char *name,
2027                                                  int fd, int is_connected)
2028 {
2029     NetSocketState *s;
2030     s = qemu_mallocz(sizeof(NetSocketState));
2031     s->fd = fd;
2032     s->vc = qemu_new_vlan_client(vlan, model, name, NULL, net_socket_receive,
2033                                  NULL, net_socket_cleanup, s);
2034     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2035              "socket: fd=%d", fd);
2036     if (is_connected) {
2037         net_socket_connect(s);
2038     } else {
2039         qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
2040     }
2041     return s;
2042 }
2043
2044 static NetSocketState *net_socket_fd_init(VLANState *vlan,
2045                                           const char *model, const char *name,
2046                                           int fd, int is_connected)
2047 {
2048     int so_type=-1, optlen=sizeof(so_type);
2049
2050     if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type,
2051         (socklen_t *)&optlen)< 0) {
2052         fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n", fd);
2053         return NULL;
2054     }
2055     switch(so_type) {
2056     case SOCK_DGRAM:
2057         return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected);
2058     case SOCK_STREAM:
2059         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
2060     default:
2061         /* who knows ... this could be a eg. a pty, do warn and continue as stream */
2062         fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
2063         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
2064     }
2065     return NULL;
2066 }
2067
2068 static void net_socket_accept(void *opaque)
2069 {
2070     NetSocketListenState *s = opaque;
2071     NetSocketState *s1;
2072     struct sockaddr_in saddr;
2073     socklen_t len;
2074     int fd;
2075
2076     for(;;) {
2077         len = sizeof(saddr);
2078         fd = accept(s->fd, (struct sockaddr *)&saddr, &len);
2079         if (fd < 0 && errno != EINTR) {
2080             return;
2081         } else if (fd >= 0) {
2082             break;
2083         }
2084     }
2085     s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1);
2086     if (!s1) {
2087         closesocket(fd);
2088     } else {
2089         snprintf(s1->vc->info_str, sizeof(s1->vc->info_str),
2090                  "socket: connection from %s:%d",
2091                  inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2092     }
2093 }
2094
2095 static int net_socket_listen_init(VLANState *vlan,
2096                                   const char *model,
2097                                   const char *name,
2098                                   const char *host_str)
2099 {
2100     NetSocketListenState *s;
2101     int fd, val, ret;
2102     struct sockaddr_in saddr;
2103
2104     if (parse_host_port(&saddr, host_str) < 0)
2105         return -1;
2106
2107     s = qemu_mallocz(sizeof(NetSocketListenState));
2108
2109     fd = socket(PF_INET, SOCK_STREAM, 0);
2110     if (fd < 0) {
2111         perror("socket");
2112         return -1;
2113     }
2114     socket_set_nonblock(fd);
2115
2116     /* allow fast reuse */
2117     val = 1;
2118     setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));
2119
2120     ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
2121     if (ret < 0) {
2122         perror("bind");
2123         return -1;
2124     }
2125     ret = listen(fd, 0);
2126     if (ret < 0) {
2127         perror("listen");
2128         return -1;
2129     }
2130     s->vlan = vlan;
2131     s->model = strdup(model);
2132     s->name = name ? strdup(name) : NULL;
2133     s->fd = fd;
2134     qemu_set_fd_handler(fd, net_socket_accept, NULL, s);
2135     return 0;
2136 }
2137
2138 static int net_socket_connect_init(VLANState *vlan,
2139                                    const char *model,
2140                                    const char *name,
2141                                    const char *host_str)
2142 {
2143     NetSocketState *s;
2144     int fd, connected, ret, err;
2145     struct sockaddr_in saddr;
2146
2147     if (parse_host_port(&saddr, host_str) < 0)
2148         return -1;
2149
2150     fd = socket(PF_INET, SOCK_STREAM, 0);
2151     if (fd < 0) {
2152         perror("socket");
2153         return -1;
2154     }
2155     socket_set_nonblock(fd);
2156
2157     connected = 0;
2158     for(;;) {
2159         ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
2160         if (ret < 0) {
2161             err = socket_error();
2162             if (err == EINTR || err == EWOULDBLOCK) {
2163             } else if (err == EINPROGRESS) {
2164                 break;
2165 #ifdef _WIN32
2166             } else if (err == WSAEALREADY) {
2167                 break;
2168 #endif
2169             } else {
2170                 perror("connect");
2171                 closesocket(fd);
2172                 return -1;
2173             }
2174         } else {
2175             connected = 1;
2176             break;
2177         }
2178     }
2179     s = net_socket_fd_init(vlan, model, name, fd, connected);
2180     if (!s)
2181         return -1;
2182     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2183              "socket: connect to %s:%d",
2184              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2185     return 0;
2186 }
2187
2188 static int net_socket_mcast_init(VLANState *vlan,
2189                                  const char *model,
2190                                  const char *name,
2191                                  const char *host_str)
2192 {
2193     NetSocketState *s;
2194     int fd;
2195     struct sockaddr_in saddr;
2196
2197     if (parse_host_port(&saddr, host_str) < 0)
2198         return -1;
2199
2200
2201     fd = net_socket_mcast_create(&saddr);
2202     if (fd < 0)
2203         return -1;
2204
2205     s = net_socket_fd_init(vlan, model, name, fd, 0);
2206     if (!s)
2207         return -1;
2208
2209     s->dgram_dst = saddr;
2210
2211     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
2212              "socket: mcast=%s:%d",
2213              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2214     return 0;
2215
2216 }
2217
2218 typedef struct DumpState {
2219     VLANClientState *pcap_vc;
2220     int fd;
2221     int pcap_caplen;
2222 } DumpState;
2223
2224 #define PCAP_MAGIC 0xa1b2c3d4
2225
2226 struct pcap_file_hdr {
2227     uint32_t magic;
2228     uint16_t version_major;
2229     uint16_t version_minor;
2230     int32_t thiszone;
2231     uint32_t sigfigs;
2232     uint32_t snaplen;
2233     uint32_t linktype;
2234 };
2235
2236 struct pcap_sf_pkthdr {
2237     struct {
2238         int32_t tv_sec;
2239         int32_t tv_usec;
2240     } ts;
2241     uint32_t caplen;
2242     uint32_t len;
2243 };
2244
2245 static ssize_t dump_receive(VLANClientState *vc, const uint8_t *buf, size_t size)
2246 {
2247     DumpState *s = vc->opaque;
2248     struct pcap_sf_pkthdr hdr;
2249     int64_t ts;
2250     int caplen;
2251
2252     /* Early return in case of previous error. */
2253     if (s->fd < 0) {
2254         return size;
2255     }
2256
2257     ts = muldiv64(qemu_get_clock(vm_clock), 1000000, ticks_per_sec);
2258     caplen = size > s->pcap_caplen ? s->pcap_caplen : size;
2259
2260     hdr.ts.tv_sec = ts / 1000000;
2261     hdr.ts.tv_usec = ts % 1000000;
2262     hdr.caplen = caplen;
2263     hdr.len = size;
2264     if (write(s->fd, &hdr, sizeof(hdr)) != sizeof(hdr) ||
2265         write(s->fd, buf, caplen) != caplen) {
2266         qemu_log("-net dump write error - stop dump\n");
2267         close(s->fd);
2268         s->fd = -1;
2269     }
2270
2271     return size;
2272 }
2273
2274 static void net_dump_cleanup(VLANClientState *vc)
2275 {
2276     DumpState *s = vc->opaque;
2277
2278     close(s->fd);
2279     qemu_free(s);
2280 }
2281
2282 static int net_dump_init(Monitor *mon, VLANState *vlan, const char *device,
2283                          const char *name, const char *filename, int len)
2284 {
2285     struct pcap_file_hdr hdr;
2286     DumpState *s;
2287
2288     s = qemu_malloc(sizeof(DumpState));
2289
2290     s->fd = open(filename, O_CREAT | O_WRONLY | O_BINARY, 0644);
2291     if (s->fd < 0) {
2292         config_error(mon, "-net dump: can't open %s\n", filename);
2293         return -1;
2294     }
2295
2296     s->pcap_caplen = len;
2297
2298     hdr.magic = PCAP_MAGIC;
2299     hdr.version_major = 2;
2300     hdr.version_minor = 4;
2301     hdr.thiszone = 0;
2302     hdr.sigfigs = 0;
2303     hdr.snaplen = s->pcap_caplen;
2304     hdr.linktype = 1;
2305
2306     if (write(s->fd, &hdr, sizeof(hdr)) < sizeof(hdr)) {
2307         config_error(mon, "-net dump write error: %s\n", strerror(errno));
2308         close(s->fd);
2309         qemu_free(s);
2310         return -1;
2311     }
2312
2313     s->pcap_vc = qemu_new_vlan_client(vlan, device, name, NULL, dump_receive, NULL,
2314                                       net_dump_cleanup, s);
2315     snprintf(s->pcap_vc->info_str, sizeof(s->pcap_vc->info_str),
2316              "dump to %s (len=%d)", filename, len);
2317     return 0;
2318 }
2319
2320 /* find or alloc a new VLAN */
2321 VLANState *qemu_find_vlan(int id, int allocate)
2322 {
2323     VLANState **pvlan, *vlan;
2324     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2325         if (vlan->id == id)
2326             return vlan;
2327     }
2328     if (!allocate) {
2329         return NULL;
2330     }
2331     vlan = qemu_mallocz(sizeof(VLANState));
2332     vlan->id = id;
2333     vlan->next = NULL;
2334     pvlan = &first_vlan;
2335     while (*pvlan != NULL)
2336         pvlan = &(*pvlan)->next;
2337     *pvlan = vlan;
2338     return vlan;
2339 }
2340
2341 static int nic_get_free_idx(void)
2342 {
2343     int index;
2344
2345     for (index = 0; index < MAX_NICS; index++)
2346         if (!nd_table[index].used)
2347             return index;
2348     return -1;
2349 }
2350
2351 void qemu_check_nic_model(NICInfo *nd, const char *model)
2352 {
2353     const char *models[2];
2354
2355     models[0] = model;
2356     models[1] = NULL;
2357
2358     qemu_check_nic_model_list(nd, models, model);
2359 }
2360
2361 void qemu_check_nic_model_list(NICInfo *nd, const char * const *models,
2362                                const char *default_model)
2363 {
2364     int i, exit_status = 0;
2365
2366     if (!nd->model)
2367         nd->model = strdup(default_model);
2368
2369     if (strcmp(nd->model, "?") != 0) {
2370         for (i = 0 ; models[i]; i++)
2371             if (strcmp(nd->model, models[i]) == 0)
2372                 return;
2373
2374         fprintf(stderr, "qemu: Unsupported NIC model: %s\n", nd->model);
2375         exit_status = 1;
2376     }
2377
2378     fprintf(stderr, "qemu: Supported NIC models: ");
2379     for (i = 0 ; models[i]; i++)
2380         fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
2381
2382     exit(exit_status);
2383 }
2384
2385 static int net_handle_fd_param(Monitor *mon, const char *param)
2386 {
2387     if (!qemu_isdigit(param[0])) {
2388         int fd;
2389
2390         fd = monitor_get_fd(mon, param);
2391         if (fd == -1) {
2392             config_error(mon, "No file descriptor named %s found", param);
2393             return -1;
2394         }
2395
2396         return fd;
2397     } else {
2398         return strtol(param, NULL, 0);
2399     }
2400 }
2401
2402 int net_client_init(Monitor *mon, const char *device, const char *p)
2403 {
2404     char buf[1024];
2405     int vlan_id, ret;
2406     VLANState *vlan;
2407     char *name = NULL;
2408
2409     vlan_id = 0;
2410     if (get_param_value(buf, sizeof(buf), "vlan", p)) {
2411         vlan_id = strtol(buf, NULL, 0);
2412     }
2413     vlan = qemu_find_vlan(vlan_id, 1);
2414
2415     if (get_param_value(buf, sizeof(buf), "name", p)) {
2416         name = qemu_strdup(buf);
2417     }
2418     if (!strcmp(device, "nic")) {
2419         static const char * const nic_params[] = {
2420             "vlan", "name", "macaddr", "model", "addr", "id", "vectors", NULL
2421         };
2422         NICInfo *nd;
2423         uint8_t *macaddr;
2424         int idx = nic_get_free_idx();
2425
2426         if (check_params(buf, sizeof(buf), nic_params, p) < 0) {
2427             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2428             ret = -1;
2429             goto out;
2430         }
2431         if (idx == -1 || nb_nics >= MAX_NICS) {
2432             config_error(mon, "Too Many NICs\n");
2433             ret = -1;
2434             goto out;
2435         }
2436         nd = &nd_table[idx];
2437         macaddr = nd->macaddr;
2438         macaddr[0] = 0x52;
2439         macaddr[1] = 0x54;
2440         macaddr[2] = 0x00;
2441         macaddr[3] = 0x12;
2442         macaddr[4] = 0x34;
2443         macaddr[5] = 0x56 + idx;
2444
2445         if (get_param_value(buf, sizeof(buf), "macaddr", p)) {
2446             if (parse_macaddr(macaddr, buf) < 0) {
2447                 config_error(mon, "invalid syntax for ethernet address\n");
2448                 ret = -1;
2449                 goto out;
2450             }
2451         }
2452         if (get_param_value(buf, sizeof(buf), "model", p)) {
2453             nd->model = strdup(buf);
2454         }
2455         if (get_param_value(buf, sizeof(buf), "addr", p)) {
2456             nd->devaddr = strdup(buf);
2457         }
2458         if (get_param_value(buf, sizeof(buf), "id", p)) {
2459             nd->id = strdup(buf);
2460         }
2461         nd->nvectors = NIC_NVECTORS_UNSPECIFIED;
2462         if (get_param_value(buf, sizeof(buf), "vectors", p)) {
2463             char *endptr;
2464             long vectors = strtol(buf, &endptr, 0);
2465             if (*endptr) {
2466                 config_error(mon, "invalid syntax for # of vectors\n");
2467                 ret = -1;
2468                 goto out;
2469             }
2470             if (vectors < 0 || vectors > 0x7ffffff) {
2471                 config_error(mon, "invalid # of vectors\n");
2472                 ret = -1;
2473                 goto out;
2474             }
2475             nd->nvectors = vectors;
2476         }
2477         nd->vlan = vlan;
2478         nd->name = name;
2479         nd->used = 1;
2480         name = NULL;
2481         nb_nics++;
2482         vlan->nb_guest_devs++;
2483         ret = idx;
2484     } else
2485     if (!strcmp(device, "none")) {
2486         if (*p != '\0') {
2487             config_error(mon, "'none' takes no parameters\n");
2488             ret = -1;
2489             goto out;
2490         }
2491         /* does nothing. It is needed to signal that no network cards
2492            are wanted */
2493         ret = 0;
2494     } else
2495 #ifdef CONFIG_SLIRP
2496     if (!strcmp(device, "user")) {
2497         static const char * const slirp_params[] = {
2498             "vlan", "name", "hostname", "restrict", "ip", "net", "host",
2499             "tftp", "bootfile", "dhcpstart", "dns", "smb", "smbserver",
2500             "hostfwd", "guestfwd", NULL
2501         };
2502         struct slirp_config_str *config;
2503         int restricted = 0;
2504         char *vnet = NULL;
2505         char *vhost = NULL;
2506         char *vhostname = NULL;
2507         char *tftp_export = NULL;
2508         char *bootfile = NULL;
2509         char *vdhcp_start = NULL;
2510         char *vnamesrv = NULL;
2511         char *smb_export = NULL;
2512         char *vsmbsrv = NULL;
2513         const char *q;
2514
2515         if (check_params(buf, sizeof(buf), slirp_params, p) < 0) {
2516             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2517             ret = -1;
2518             goto out;
2519         }
2520         if (get_param_value(buf, sizeof(buf), "ip", p)) {
2521             int vnet_buflen = strlen(buf) + strlen("/24") + 1;
2522             /* emulate legacy parameter */
2523             vnet = qemu_malloc(vnet_buflen);
2524             pstrcpy(vnet, vnet_buflen, buf);
2525             pstrcat(vnet, vnet_buflen, "/24");
2526         }
2527         if (get_param_value(buf, sizeof(buf), "net", p)) {
2528             vnet = qemu_strdup(buf);
2529         }
2530         if (get_param_value(buf, sizeof(buf), "host", p)) {
2531             vhost = qemu_strdup(buf);
2532         }
2533         if (get_param_value(buf, sizeof(buf), "hostname", p)) {
2534             vhostname = qemu_strdup(buf);
2535         }
2536         if (get_param_value(buf, sizeof(buf), "restrict", p)) {
2537             restricted = (buf[0] == 'y') ? 1 : 0;
2538         }
2539         if (get_param_value(buf, sizeof(buf), "dhcpstart", p)) {
2540             vdhcp_start = qemu_strdup(buf);
2541         }
2542         if (get_param_value(buf, sizeof(buf), "dns", p)) {
2543             vnamesrv = qemu_strdup(buf);
2544         }
2545         if (get_param_value(buf, sizeof(buf), "tftp", p)) {
2546             tftp_export = qemu_strdup(buf);
2547         }
2548         if (get_param_value(buf, sizeof(buf), "bootfile", p)) {
2549             bootfile = qemu_strdup(buf);
2550         }
2551         if (get_param_value(buf, sizeof(buf), "smb", p)) {
2552             smb_export = qemu_strdup(buf);
2553             if (get_param_value(buf, sizeof(buf), "smbserver", p)) {
2554                 vsmbsrv = qemu_strdup(buf);
2555             }
2556         }
2557         q = p;
2558         while (1) {
2559             config = qemu_malloc(sizeof(*config));
2560             if (!get_next_param_value(config->str, sizeof(config->str),
2561                                       "hostfwd", &q)) {
2562                 break;
2563             }
2564             config->flags = SLIRP_CFG_HOSTFWD;
2565             config->next = slirp_configs;
2566             slirp_configs = config;
2567             config = NULL;
2568         }
2569         q = p;
2570         while (1) {
2571             config = qemu_malloc(sizeof(*config));
2572             if (!get_next_param_value(config->str, sizeof(config->str),
2573                                       "guestfwd", &q)) {
2574                 break;
2575             }
2576             config->flags = 0;
2577             config->next = slirp_configs;
2578             slirp_configs = config;
2579             config = NULL;
2580         }
2581         qemu_free(config);
2582         vlan->nb_host_devs++;
2583         ret = net_slirp_init(mon, vlan, device, name, restricted, vnet, vhost,
2584                              vhostname, tftp_export, bootfile, vdhcp_start,
2585                              vnamesrv, smb_export, vsmbsrv);
2586         qemu_free(vnet);
2587         qemu_free(vhost);
2588         qemu_free(vhostname);
2589         qemu_free(tftp_export);
2590         qemu_free(bootfile);
2591         qemu_free(vdhcp_start);
2592         qemu_free(vnamesrv);
2593         qemu_free(smb_export);
2594         qemu_free(vsmbsrv);
2595     } else if (!strcmp(device, "channel")) {
2596         if (TAILQ_EMPTY(&slirp_stacks)) {
2597             struct slirp_config_str *config;
2598
2599             config = qemu_malloc(sizeof(*config));
2600             pstrcpy(config->str, sizeof(config->str), p);
2601             config->flags = SLIRP_CFG_LEGACY;
2602             config->next = slirp_configs;
2603             slirp_configs = config;
2604         } else {
2605             slirp_guestfwd(TAILQ_FIRST(&slirp_stacks), mon, p, 1);
2606         }
2607         ret = 0;
2608     } else
2609 #endif
2610 #ifdef _WIN32
2611     if (!strcmp(device, "tap")) {
2612         static const char * const tap_params[] = {
2613             "vlan", "name", "ifname", NULL
2614         };
2615         char ifname[64];
2616
2617         if (check_params(buf, sizeof(buf), tap_params, p) < 0) {
2618             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2619             ret = -1;
2620             goto out;
2621         }
2622         if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
2623             config_error(mon, "tap: no interface name\n");
2624             ret = -1;
2625             goto out;
2626         }
2627         vlan->nb_host_devs++;
2628         ret = tap_win32_init(vlan, device, name, ifname);
2629     } else
2630 #elif defined (_AIX)
2631 #else
2632     if (!strcmp(device, "tap")) {
2633         char ifname[64], chkbuf[64];
2634         char setup_script[1024], down_script[1024];
2635         TAPState *s;
2636         int fd;
2637         vlan->nb_host_devs++;
2638         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
2639             static const char * const fd_params[] = {
2640                 "vlan", "name", "fd", "sndbuf", NULL
2641             };
2642             ret = -1;
2643             if (check_params(chkbuf, sizeof(chkbuf), fd_params, p) < 0) {
2644                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2645                 goto out;
2646             }
2647             fd = net_handle_fd_param(mon, buf);
2648             if (fd == -1) {
2649                 goto out;
2650             }
2651             fcntl(fd, F_SETFL, O_NONBLOCK);
2652             s = net_tap_fd_init(vlan, device, name, fd);
2653             if (!s) {
2654                 close(fd);
2655             }
2656         } else {
2657             static const char * const tap_params[] = {
2658                 "vlan", "name", "ifname", "script", "downscript", "sndbuf", NULL
2659             };
2660             if (check_params(chkbuf, sizeof(chkbuf), tap_params, p) < 0) {
2661                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2662                 ret = -1;
2663                 goto out;
2664             }
2665             if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
2666                 ifname[0] = '\0';
2667             }
2668             if (get_param_value(setup_script, sizeof(setup_script), "script", p) == 0) {
2669                 pstrcpy(setup_script, sizeof(setup_script), DEFAULT_NETWORK_SCRIPT);
2670             }
2671             if (get_param_value(down_script, sizeof(down_script), "downscript", p) == 0) {
2672                 pstrcpy(down_script, sizeof(down_script), DEFAULT_NETWORK_DOWN_SCRIPT);
2673             }
2674             s = net_tap_init(vlan, device, name, ifname, setup_script, down_script);
2675         }
2676         if (s != NULL) {
2677             const char *sndbuf_str = NULL;
2678             if (get_param_value(buf, sizeof(buf), "sndbuf", p)) {
2679                 sndbuf_str = buf;
2680             }
2681             tap_set_sndbuf(s, sndbuf_str, mon);
2682             ret = 0;
2683         } else {
2684             ret = -1;
2685         }
2686     } else
2687 #endif
2688     if (!strcmp(device, "socket")) {
2689         char chkbuf[64];
2690         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
2691             static const char * const fd_params[] = {
2692                 "vlan", "name", "fd", NULL
2693             };
2694             int fd;
2695             ret = -1;
2696             if (check_params(chkbuf, sizeof(chkbuf), fd_params, p) < 0) {
2697                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2698                 goto out;
2699             }
2700             fd = net_handle_fd_param(mon, buf);
2701             if (fd == -1) {
2702                 goto out;
2703             }
2704             if (!net_socket_fd_init(vlan, device, name, fd, 1)) {
2705                 close(fd);
2706                 goto out;
2707             }
2708             ret = 0;
2709         } else if (get_param_value(buf, sizeof(buf), "listen", p) > 0) {
2710             static const char * const listen_params[] = {
2711                 "vlan", "name", "listen", NULL
2712             };
2713             if (check_params(chkbuf, sizeof(chkbuf), listen_params, p) < 0) {
2714                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2715                 ret = -1;
2716                 goto out;
2717             }
2718             ret = net_socket_listen_init(vlan, device, name, buf);
2719         } else if (get_param_value(buf, sizeof(buf), "connect", p) > 0) {
2720             static const char * const connect_params[] = {
2721                 "vlan", "name", "connect", NULL
2722             };
2723             if (check_params(chkbuf, sizeof(chkbuf), connect_params, p) < 0) {
2724                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2725                 ret = -1;
2726                 goto out;
2727             }
2728             ret = net_socket_connect_init(vlan, device, name, buf);
2729         } else if (get_param_value(buf, sizeof(buf), "mcast", p) > 0) {
2730             static const char * const mcast_params[] = {
2731                 "vlan", "name", "mcast", NULL
2732             };
2733             if (check_params(chkbuf, sizeof(chkbuf), mcast_params, p) < 0) {
2734                 config_error(mon, "invalid parameter '%s' in '%s'\n", chkbuf, p);
2735                 ret = -1;
2736                 goto out;
2737             }
2738             ret = net_socket_mcast_init(vlan, device, name, buf);
2739         } else {
2740             config_error(mon, "Unknown socket options: %s\n", p);
2741             ret = -1;
2742             goto out;
2743         }
2744         vlan->nb_host_devs++;
2745     } else
2746 #ifdef CONFIG_VDE
2747     if (!strcmp(device, "vde")) {
2748         static const char * const vde_params[] = {
2749             "vlan", "name", "sock", "port", "group", "mode", NULL
2750         };
2751         char vde_sock[1024], vde_group[512];
2752         int vde_port, vde_mode;
2753
2754         if (check_params(buf, sizeof(buf), vde_params, p) < 0) {
2755             config_error(mon, "invalid parameter '%s' in '%s'\n", buf, p);
2756             ret = -1;
2757             goto out;
2758         }
2759         vlan->nb_host_devs++;
2760         if (get_param_value(vde_sock, sizeof(vde_sock), "sock", p) <= 0) {
2761             vde_sock[0] = '\0';
2762         }
2763         if (get_param_value(buf, sizeof(buf), "port", p) > 0) {
2764             vde_port = strtol(buf, NULL, 10);
2765         } else {
2766             vde_port = 0;
2767         }
2768         if (get_param_value(vde_group, sizeof(vde_group), "group", p) <= 0) {
2769             vde_group[0] = '\0';
2770         }
2771         if (get_param_value(buf, sizeof(buf), "mode", p) > 0) {
2772             vde_mode = strtol(buf, NULL, 8);
2773         } else {
2774             vde_mode = 0700;
2775         }
2776         ret = net_vde_init(vlan, device, name, vde_sock, vde_port, vde_group, vde_mode);
2777     } else
2778 #endif
2779     if (!strcmp(device, "dump")) {
2780         int len = 65536;
2781
2782         if (get_param_value(buf, sizeof(buf), "len", p) > 0) {
2783             len = strtol(buf, NULL, 0);
2784         }
2785         if (!get_param_value(buf, sizeof(buf), "file", p)) {
2786             snprintf(buf, sizeof(buf), "qemu-vlan%d.pcap", vlan_id);
2787         }
2788         ret = net_dump_init(mon, vlan, device, name, buf, len);
2789     } else {
2790         config_error(mon, "Unknown network device: %s\n", device);
2791         ret = -1;
2792         goto out;
2793     }
2794     if (ret < 0) {
2795         config_error(mon, "Could not initialize device '%s'\n", device);
2796     }
2797 out:
2798     qemu_free(name);
2799     return ret;
2800 }
2801
2802 void net_client_uninit(NICInfo *nd)
2803 {
2804     nd->vlan->nb_guest_devs--;
2805     nb_nics--;
2806     nd->used = 0;
2807     free((void *)nd->model);
2808 }
2809
2810 static int net_host_check_device(const char *device)
2811 {
2812     int i;
2813     const char *valid_param_list[] = { "tap", "socket", "dump"
2814 #ifdef CONFIG_SLIRP
2815                                        ,"user"
2816 #endif
2817 #ifdef CONFIG_VDE
2818                                        ,"vde"
2819 #endif
2820     };
2821     for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) {
2822         if (!strncmp(valid_param_list[i], device,
2823                      strlen(valid_param_list[i])))
2824             return 1;
2825     }
2826
2827     return 0;
2828 }
2829
2830 void net_host_device_add(Monitor *mon, const char *device, const char *opts)
2831 {
2832     if (!net_host_check_device(device)) {
2833         monitor_printf(mon, "invalid host network device %s\n", device);
2834         return;
2835     }
2836     if (net_client_init(mon, device, opts ? opts : "") < 0) {
2837         monitor_printf(mon, "adding host network device %s failed\n", device);
2838     }
2839 }
2840
2841 void net_host_device_remove(Monitor *mon, int vlan_id, const char *device)
2842 {
2843     VLANClientState *vc;
2844
2845     vc = qemu_find_vlan_client_by_name(mon, vlan_id, device);
2846     if (!vc) {
2847         return;
2848     }
2849     if (!net_host_check_device(vc->model)) {
2850         monitor_printf(mon, "invalid host network device %s\n", device);
2851         return;
2852     }
2853     qemu_del_vlan_client(vc);
2854 }
2855
2856 int net_client_parse(const char *str)
2857 {
2858     const char *p;
2859     char *q;
2860     char device[64];
2861
2862     p = str;
2863     q = device;
2864     while (*p != '\0' && *p != ',') {
2865         if ((q - device) < sizeof(device) - 1)
2866             *q++ = *p;
2867         p++;
2868     }
2869     *q = '\0';
2870     if (*p == ',')
2871         p++;
2872
2873     return net_client_init(NULL, device, p);
2874 }
2875
2876 void net_set_boot_mask(int net_boot_mask)
2877 {
2878     int i;
2879
2880     /* Only the first four NICs may be bootable */
2881     net_boot_mask = net_boot_mask & 0xF;
2882
2883     for (i = 0; i < nb_nics; i++) {
2884         if (net_boot_mask & (1 << i)) {
2885             nd_table[i].bootable = 1;
2886             net_boot_mask &= ~(1 << i);
2887         }
2888     }
2889
2890     if (net_boot_mask) {
2891         fprintf(stderr, "Cannot boot from non-existent NIC\n");
2892         exit(1);
2893     }
2894 }
2895
2896 void do_info_network(Monitor *mon)
2897 {
2898     VLANState *vlan;
2899     VLANClientState *vc;
2900
2901     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2902         monitor_printf(mon, "VLAN %d devices:\n", vlan->id);
2903         for(vc = vlan->first_client; vc != NULL; vc = vc->next)
2904             monitor_printf(mon, "  %s: %s\n", vc->name, vc->info_str);
2905     }
2906 }
2907
2908 void do_set_link(Monitor *mon, const char *name, const char *up_or_down)
2909 {
2910     VLANState *vlan;
2911     VLANClientState *vc = NULL;
2912
2913     for (vlan = first_vlan; vlan != NULL; vlan = vlan->next)
2914         for (vc = vlan->first_client; vc != NULL; vc = vc->next)
2915             if (strcmp(vc->name, name) == 0)
2916                 goto done;
2917 done:
2918
2919     if (!vc) {
2920         monitor_printf(mon, "could not find network device '%s'", name);
2921         return;
2922     }
2923
2924     if (strcmp(up_or_down, "up") == 0)
2925         vc->link_down = 0;
2926     else if (strcmp(up_or_down, "down") == 0)
2927         vc->link_down = 1;
2928     else
2929         monitor_printf(mon, "invalid link status '%s'; only 'up' or 'down' "
2930                        "valid\n", up_or_down);
2931
2932     if (vc->link_status_changed)
2933         vc->link_status_changed(vc);
2934 }
2935
2936 void net_cleanup(void)
2937 {
2938     VLANState *vlan;
2939
2940     /* close network clients */
2941     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2942         VLANClientState *vc = vlan->first_client;
2943
2944         while (vc) {
2945             VLANClientState *next = vc->next;
2946
2947             qemu_del_vlan_client(vc);
2948
2949             vc = next;
2950         }
2951     }
2952 }
2953
2954 void net_client_check(void)
2955 {
2956     VLANState *vlan;
2957
2958     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
2959         if (vlan->nb_guest_devs == 0 && vlan->nb_host_devs == 0)
2960             continue;
2961         if (vlan->nb_guest_devs == 0)
2962             fprintf(stderr, "Warning: vlan %d with no nics\n", vlan->id);
2963         if (vlan->nb_host_devs == 0)
2964             fprintf(stderr,
2965                     "Warning: vlan %d is not connected to host network\n",
2966                     vlan->id);
2967     }
2968 }