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 HOST_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 HOST_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 #ifdef _WIN32
 105 #include <windows.h>
 106 #include <malloc.h>
 107 #include <sys/timeb.h>
 108 #include <mmsystem.h>
 109 #define getopt_long_only getopt_long
 110 #define memalign(align, size) malloc(size)
 111 #endif
 112
 113 #include "qemu-common.h"
 114 #include "net.h"
 115 #include "monitor.h"
 116 #include "sysemu.h"
 117 #include "qemu-timer.h"
 118 #include "qemu-char.h"
 119 #include "audio/audio.h"
 120 #include "qemu_socket.h"
 121
 122 #if defined(CONFIG_SLIRP)
 123 #include "libslirp.h"
 124 #endif
 125
 126
 127 static VLANState *first_vlan;
 128
 129 /***********************************************************/
 130 /* network device redirectors */
 131
 132 #if defined(DEBUG_NET) || defined(DEBUG_SLIRP)
 133 static void hex_dump(FILE *f, const uint8_t *buf, int size)
 134 {
 135     int len, i, j, c;
 136
 137     for(i=0;i<size;i+=16) {
 138         len = size - i;
 139         if (len > 16)
 140             len = 16;
 141         fprintf(f, "%08x ", i);
 142         for(j=0;j<16;j++) {
 143             if (j < len)
 144                 fprintf(f, " %02x", buf[i+j]);
 145             else
 146                 fprintf(f, "   ");
 147         }
 148         fprintf(f, " ");
 149         for(j=0;j<len;j++) {
 150             c = buf[i+j];
 151             if (c < ' ' || c > '~')
 152                 c = '.';
 153             fprintf(f, "%c", c);
 154         }
 155         fprintf(f, "\n");
 156     }
 157 }
 158 #endif
 159
 160 static int parse_macaddr(uint8_t *macaddr, const char *p)
 161 {
 162     int i;
 163     char *last_char;
 164     long int offset;
 165
 166     errno = 0;
 167     offset = strtol(p, &last_char, 0);
 168     if (0 == errno && '\0' == *last_char &&
 169             offset >= 0 && offset <= 0xFFFFFF) {
 170         macaddr[3] = (offset & 0xFF0000) >> 16;
 171         macaddr[4] = (offset & 0xFF00) >> 8;
 172         macaddr[5] = offset & 0xFF;
 173         return 0;
 174     } else {
 175         for(i = 0; i < 6; i++) {
 176             macaddr[i] = strtol(p, (char **)&p, 16);
 177             if (i == 5) {
 178                 if (*p != '\0')
 179                     return -1;
 180             } else {
 181                 if (*p != ':' && *p != '-')
 182                     return -1;
 183                 p++;
 184             }
 185         }
 186         return 0;
 187     }
 188
 189     return -1;
 190 }
 191
 192 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
 193 {
 194     const char *p, *p1;
 195     int len;
 196     p = *pp;
 197     p1 = strchr(p, sep);
 198     if (!p1)
 199         return -1;
 200     len = p1 - p;
 201     p1++;
 202     if (buf_size > 0) {
 203         if (len > buf_size - 1)
 204             len = buf_size - 1;
 205         memcpy(buf, p, len);
 206         buf[len] = '\0';
 207     }
 208     *pp = p1;
 209     return 0;
 210 }
 211
 212 int parse_host_src_port(struct sockaddr_in *haddr,
 213                         struct sockaddr_in *saddr,
 214                         const char *input_str)
 215 {
 216     char *str = strdup(input_str);
 217     char *host_str = str;
 218     char *src_str;
 219     const char *src_str2;
 220     char *ptr;
 221
 222     /*
 223      * Chop off any extra arguments at the end of the string which
 224      * would start with a comma, then fill in the src port information
 225      * if it was provided else use the "any address" and "any port".
 226      */
 227     if ((ptr = strchr(str,',')))
 228         *ptr = '\0';
 229
 230     if ((src_str = strchr(input_str,'@'))) {
 231         *src_str = '\0';
 232         src_str++;
 233     }
 234
 235     if (parse_host_port(haddr, host_str) < 0)
 236         goto fail;
 237
 238     src_str2 = src_str;
 239     if (!src_str || *src_str == '\0')
 240         src_str2 = ":0";
 241
 242     if (parse_host_port(saddr, src_str2) < 0)
 243         goto fail;
 244
 245     free(str);
 246     return(0);
 247
 248 fail:
 249     free(str);
 250     return -1;
 251 }
 252
 253 int parse_host_port(struct sockaddr_in *saddr, const char *str)
 254 {
 255     char buf[512];
 256     struct hostent *he;
 257     const char *p, *r;
 258     int port;
 259
 260     p = str;
 261     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 262         return -1;
 263     saddr->sin_family = AF_INET;
 264     if (buf[0] == '\0') {
 265         saddr->sin_addr.s_addr = 0;
 266     } else {
 267         if (qemu_isdigit(buf[0])) {
 268             if (!inet_aton(buf, &saddr->sin_addr))
 269                 return -1;
 270         } else {
 271             if ((he = gethostbyname(buf)) == NULL)
 272                 return - 1;
 273             saddr->sin_addr = *(struct in_addr *)he->h_addr;
 274         }
 275     }
 276     port = strtol(p, (char **)&r, 0);
 277     if (r == p)
 278         return -1;
 279     saddr->sin_port = htons(port);
 280     return 0;
 281 }
 282
 283 #if !defined(_WIN32) && 0
 284 static int parse_unix_path(struct sockaddr_un *uaddr, const char *str)
 285 {
 286     const char *p;
 287     int len;
 288
 289     len = MIN(108, strlen(str));
 290     p = strchr(str, ',');
 291     if (p)
 292         len = MIN(len, p - str);
 293
 294     memset(uaddr, 0, sizeof(*uaddr));
 295
 296     uaddr->sun_family = AF_UNIX;
 297     memcpy(uaddr->sun_path, str, len);
 298
 299     return 0;
 300 }
 301 #endif
 302
 303 void qemu_format_nic_info_str(VLANClientState *vc, uint8_t macaddr[6])
 304 {
 305     snprintf(vc->info_str, sizeof(vc->info_str),
 306              "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x",
 307              vc->model,
 308              macaddr[0], macaddr[1], macaddr[2],
 309              macaddr[3], macaddr[4], macaddr[5]);
 310 }
 311
 312 static char *assign_name(VLANClientState *vc1, const char *model)
 313 {
 314     VLANState *vlan;
 315     char buf[256];
 316     int id = 0;
 317
 318     for (vlan = first_vlan; vlan; vlan = vlan->next) {
 319         VLANClientState *vc;
 320
 321         for (vc = vlan->first_client; vc; vc = vc->next)
 322             if (vc != vc1 && strcmp(vc->model, model) == 0)
 323                 id++;
 324     }
 325
 326     snprintf(buf, sizeof(buf), "%s.%d", model, id);
 327
 328     return strdup(buf);
 329 }
 330
 331 VLANClientState *qemu_new_vlan_client(VLANState *vlan,
 332                                       const char *model,
 333                                       const char *name,
 334                                       IOReadHandler *fd_read,
 335                                       IOCanRWHandler *fd_can_read,
 336                                       void *opaque)
 337 {
 338     VLANClientState *vc, **pvc;
 339     vc = qemu_mallocz(sizeof(VLANClientState));
 340     vc->model = strdup(model);
 341     if (name)
 342         vc->name = strdup(name);
 343     else
 344         vc->name = assign_name(vc, model);
 345     vc->fd_read = fd_read;
 346     vc->fd_can_read = fd_can_read;
 347     vc->opaque = opaque;
 348     vc->vlan = vlan;
 349
 350     vc->next = NULL;
 351     pvc = &vlan->first_client;
 352     while (*pvc != NULL)
 353         pvc = &(*pvc)->next;
 354     *pvc = vc;
 355     return vc;
 356 }
 357
 358 void qemu_del_vlan_client(VLANClientState *vc)
 359 {
 360     VLANClientState **pvc = &vc->vlan->first_client;
 361
 362     while (*pvc != NULL)
 363         if (*pvc == vc) {
 364             *pvc = vc->next;
 365             free(vc->name);
 366             free(vc->model);
 367             free(vc);
 368             break;
 369         } else
 370             pvc = &(*pvc)->next;
 371 }
 372
 373 VLANClientState *qemu_find_vlan_client(VLANState *vlan, void *opaque)
 374 {
 375     VLANClientState **pvc = &vlan->first_client;
 376
 377     while (*pvc != NULL)
 378         if ((*pvc)->opaque == opaque)
 379             return *pvc;
 380         else
 381             pvc = &(*pvc)->next;
 382
 383     return NULL;
 384 }
 385
 386 int qemu_can_send_packet(VLANClientState *vc1)
 387 {
 388     VLANState *vlan = vc1->vlan;
 389     VLANClientState *vc;
 390
 391     for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
 392         if (vc != vc1) {
 393             if (vc->fd_can_read && vc->fd_can_read(vc->opaque))
 394                 return 1;
 395         }
 396     }
 397     return 0;
 398 }
 399
 400 void qemu_send_packet(VLANClientState *vc1, const uint8_t *buf, int size)
 401 {
 402     VLANState *vlan = vc1->vlan;
 403     VLANClientState *vc;
 404
 405     if (vc1->link_down)
 406         return;
 407
 408 #ifdef DEBUG_NET
 409     printf("vlan %d send:\n", vlan->id);
 410     hex_dump(stdout, buf, size);
 411 #endif
 412     for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
 413         if (vc != vc1 && !vc->link_down) {
 414             vc->fd_read(vc->opaque, buf, size);
 415         }
 416     }
 417 }
 418
 419 static ssize_t vc_sendv_compat(VLANClientState *vc, const struct iovec *iov,
 420                                int iovcnt)
 421 {
 422     uint8_t buffer[4096];
 423     size_t offset = 0;
 424     int i;
 425
 426     for (i = 0; i < iovcnt; i++) {
 427         size_t len;
 428
 429         len = MIN(sizeof(buffer) - offset, iov[i].iov_len);
 430         memcpy(buffer + offset, iov[i].iov_base, len);
 431         offset += len;
 432     }
 433
 434     vc->fd_read(vc->opaque, buffer, offset);
 435
 436     return offset;
 437 }
 438
 439 static ssize_t calc_iov_length(const struct iovec *iov, int iovcnt)
 440 {
 441     size_t offset = 0;
 442     int i;
 443
 444     for (i = 0; i < iovcnt; i++)
 445         offset += iov[i].iov_len;
 446     return offset;
 447 }
 448
 449 ssize_t qemu_sendv_packet(VLANClientState *vc1, const struct iovec *iov,
 450                           int iovcnt)
 451 {
 452     VLANState *vlan = vc1->vlan;
 453     VLANClientState *vc;
 454     ssize_t max_len = 0;
 455
 456     if (vc1->link_down)
 457         return calc_iov_length(iov, iovcnt);
 458
 459     for (vc = vlan->first_client; vc != NULL; vc = vc->next) {
 460         ssize_t len = 0;
 461
 462         if (vc == vc1)
 463             continue;
 464
 465         if (vc->link_down)
 466             len = calc_iov_length(iov, iovcnt);
 467         if (vc->fd_readv)
 468             len = vc->fd_readv(vc->opaque, iov, iovcnt);
 469         else if (vc->fd_read)
 470             len = vc_sendv_compat(vc, iov, iovcnt);
 471
 472         max_len = MAX(max_len, len);
 473     }
 474
 475     return max_len;
 476 }
 477
 478 #if defined(CONFIG_SLIRP)
 479
 480 /* slirp network adapter */
 481
 482 static int slirp_inited;
 483 static int slirp_restrict;
 484 static char *slirp_ip;
 485 static VLANClientState *slirp_vc;
 486
 487 int slirp_can_output(void)
 488 {
 489     return !slirp_vc || qemu_can_send_packet(slirp_vc);
 490 }
 491
 492 void slirp_output(const uint8_t *pkt, int pkt_len)
 493 {
 494 #ifdef DEBUG_SLIRP
 495     printf("slirp output:\n");
 496     hex_dump(stdout, pkt, pkt_len);
 497 #endif
 498     if (!slirp_vc)
 499         return;
 500     qemu_send_packet(slirp_vc, pkt, pkt_len);
 501 }
 502
 503 int slirp_is_inited(void)
 504 {
 505     return slirp_inited;
 506 }
 507
 508 static void slirp_receive(void *opaque, const uint8_t *buf, int size)
 509 {
 510 #ifdef DEBUG_SLIRP
 511     printf("slirp input:\n");
 512     hex_dump(stdout, buf, size);
 513 #endif
 514     slirp_input(buf, size);
 515 }
 516
 517 static int net_slirp_init(VLANState *vlan, const char *model, const char *name)
 518 {
 519     if (!slirp_inited) {
 520         slirp_inited = 1;
 521         slirp_init(slirp_restrict, slirp_ip);
 522     }
 523     slirp_vc = qemu_new_vlan_client(vlan, model, name,
 524                                     slirp_receive, NULL, NULL);
 525     slirp_vc->info_str[0] = '\0';
 526     return 0;
 527 }
 528
 529 void net_slirp_redir(const char *redir_str)
 530 {
 531     int is_udp;
 532     char buf[256], *r;
 533     const char *p;
 534     struct in_addr guest_addr;
 535     int host_port, guest_port;
 536
 537     if (!slirp_inited) {
 538         slirp_inited = 1;
 539         slirp_init(slirp_restrict, slirp_ip);
 540     }
 541
 542     p = redir_str;
 543     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 544         goto fail;
 545     if (!strcmp(buf, "tcp")) {
 546         is_udp = 0;
 547     } else if (!strcmp(buf, "udp")) {
 548         is_udp = 1;
 549     } else {
 550         goto fail;
 551     }
 552
 553     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 554         goto fail;
 555     host_port = strtol(buf, &r, 0);
 556     if (r == buf)
 557         goto fail;
 558
 559     if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
 560         goto fail;
 561     if (buf[0] == '\0') {
 562         pstrcpy(buf, sizeof(buf), "10.0.2.15");
 563     }
 564     if (!inet_aton(buf, &guest_addr))
 565         goto fail;
 566
 567     guest_port = strtol(p, &r, 0);
 568     if (r == p)
 569         goto fail;
 570
 571     if (slirp_redir(is_udp, host_port, guest_addr, guest_port) < 0) {
 572         fprintf(stderr, "qemu: could not set up redirection\n");
 573         exit(1);
 574     }
 575     return;
 576  fail:
 577     fprintf(stderr, "qemu: syntax: -redir [tcp|udp]:host-port:[guest-host]:guest-port\n");
 578     exit(1);
 579 }
 580
 581 #ifndef _WIN32
 582
 583 static char smb_dir[1024];
 584
 585 static void erase_dir(char *dir_name)
 586 {
 587     DIR *d;
 588     struct dirent *de;
 589     char filename[1024];
 590
 591     /* erase all the files in the directory */
 592     if ((d = opendir(dir_name)) != NULL) {
 593         for(;;) {
 594             de = readdir(d);
 595             if (!de)
 596                 break;
 597             if (strcmp(de->d_name, ".") != 0 &&
 598                 strcmp(de->d_name, "..") != 0) {
 599                 snprintf(filename, sizeof(filename), "%s/%s",
 600                          smb_dir, de->d_name);
 601                 if (unlink(filename) != 0)  /* is it a directory? */
 602                     erase_dir(filename);
 603             }
 604         }
 605         closedir(d);
 606         rmdir(dir_name);
 607     }
 608 }
 609
 610 /* automatic user mode samba server configuration */
 611 static void smb_exit(void)
 612 {
 613     erase_dir(smb_dir);
 614 }
 615
 616 /* automatic user mode samba server configuration */
 617 void net_slirp_smb(const char *exported_dir)
 618 {
 619     char smb_conf[1024];
 620     char smb_cmdline[1024];
 621     FILE *f;
 622
 623     if (!slirp_inited) {
 624         slirp_inited = 1;
 625         slirp_init(slirp_restrict, slirp_ip);
 626     }
 627
 628     /* XXX: better tmp dir construction */
 629     snprintf(smb_dir, sizeof(smb_dir), "/tmp/qemu-smb.%d", getpid());
 630     if (mkdir(smb_dir, 0700) < 0) {
 631         fprintf(stderr, "qemu: could not create samba server dir '%s'\n", smb_dir);
 632         exit(1);
 633     }
 634     snprintf(smb_conf, sizeof(smb_conf), "%s/%s", smb_dir, "smb.conf");
 635
 636     f = fopen(smb_conf, "w");
 637     if (!f) {
 638         fprintf(stderr, "qemu: could not create samba server configuration file '%s'\n", smb_conf);
 639         exit(1);
 640     }
 641     fprintf(f,
 642             "[global]\n"
 643             "private dir=%s\n"
 644             "smb ports=0\n"
 645             "socket address=127.0.0.1\n"
 646             "pid directory=%s\n"
 647             "lock directory=%s\n"
 648             "log file=%s/log.smbd\n"
 649             "smb passwd file=%s/smbpasswd\n"
 650             "security = share\n"
 651             "[qemu]\n"
 652             "path=%s\n"
 653             "read only=no\n"
 654             "guest ok=yes\n",
 655             smb_dir,
 656             smb_dir,
 657             smb_dir,
 658             smb_dir,
 659             smb_dir,
 660             exported_dir
 661             );
 662     fclose(f);
 663     atexit(smb_exit);
 664
 665     snprintf(smb_cmdline, sizeof(smb_cmdline), "%s -s %s",
 666              SMBD_COMMAND, smb_conf);
 667
 668     slirp_add_exec(0, smb_cmdline, 4, 139);
 669 }
 670
 671 #endif /* !defined(_WIN32) */
 672 void do_info_slirp(Monitor *mon)
 673 {
 674     slirp_stats();
 675 }
 676
 677 struct VMChannel {
 678     CharDriverState *hd;
 679     int port;
 680 };
 681
 682 static int vmchannel_can_read(void *opaque)
 683 {
 684     struct VMChannel *vmc = (struct VMChannel*)opaque;
 685     return slirp_socket_can_recv(4, vmc->port);
 686 }
 687
 688 static void vmchannel_read(void *opaque, const uint8_t *buf, int size)
 689 {
 690     struct VMChannel *vmc = (struct VMChannel*)opaque;
 691     slirp_socket_recv(4, vmc->port, buf, size);
 692 }
 693
 694 #endif /* CONFIG_SLIRP */
 695
 696 #if !defined(_WIN32)
 697
 698 typedef struct TAPState {
 699     VLANClientState *vc;
 700     int fd;
 701     char down_script[1024];
 702     char down_script_arg[128];
 703 } TAPState;
 704
 705 #ifdef HAVE_IOVEC
 706 static ssize_t tap_receive_iov(void *opaque, const struct iovec *iov,
 707                                int iovcnt)
 708 {
 709     TAPState *s = opaque;
 710     ssize_t len;
 711
 712     do {
 713         len = writev(s->fd, iov, iovcnt);
 714     } while (len == -1 && (errno == EINTR || errno == EAGAIN));
 715
 716     return len;
 717 }
 718 #endif
 719
 720 static void tap_receive(void *opaque, const uint8_t *buf, int size)
 721 {
 722     TAPState *s = opaque;
 723     int ret;
 724     for(;;) {
 725         ret = write(s->fd, buf, size);
 726         if (ret < 0 && (errno == EINTR || errno == EAGAIN)) {
 727         } else {
 728             break;
 729         }
 730     }
 731 }
 732
 733 static void tap_send(void *opaque)
 734 {
 735     TAPState *s = opaque;
 736     uint8_t buf[4096];
 737     int size;
 738
 739 #ifdef __sun__
 740     struct strbuf sbuf;
 741     int f = 0;
 742     sbuf.maxlen = sizeof(buf);
 743     sbuf.buf = buf;
 744     size = getmsg(s->fd, NULL, &sbuf, &f) >=0 ? sbuf.len : -1;
 745 #else
 746     size = read(s->fd, buf, sizeof(buf));
 747 #endif
 748     if (size > 0) {
 749         qemu_send_packet(s->vc, buf, size);
 750     }
 751 }
 752
 753 /* fd support */
 754
 755 static TAPState *net_tap_fd_init(VLANState *vlan,
 756                                  const char *model,
 757                                  const char *name,
 758                                  int fd)
 759 {
 760     TAPState *s;
 761
 762     s = qemu_mallocz(sizeof(TAPState));
 763     s->fd = fd;
 764     s->vc = qemu_new_vlan_client(vlan, model, name, tap_receive, NULL, s);
 765 #ifdef HAVE_IOVEC
 766     s->vc->fd_readv = tap_receive_iov;
 767 #endif
 768     qemu_set_fd_handler(s->fd, tap_send, NULL, s);
 769     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "fd=%d", fd);
 770     return s;
 771 }
 772
 773 #if defined (HOST_BSD) || defined (__FreeBSD_kernel__)
 774 static int tap_open(char *ifname, int ifname_size)
 775 {
 776     int fd;
 777     char *dev;
 778     struct stat s;
 779
 780     TFR(fd = open("/dev/tap", O_RDWR));
 781     if (fd < 0) {
 782         fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n");
 783         return -1;
 784     }
 785
 786     fstat(fd, &s);
 787     dev = devname(s.st_rdev, S_IFCHR);
 788     pstrcpy(ifname, ifname_size, dev);
 789
 790     fcntl(fd, F_SETFL, O_NONBLOCK);
 791     return fd;
 792 }
 793 #elif defined(__sun__)
 794 #define TUNNEWPPA       (('T'<<16) | 0x0001)
 795 /*
 796  * Allocate TAP device, returns opened fd.
 797  * Stores dev name in the first arg(must be large enough).
 798  */
 799 int tap_alloc(char *dev, size_t dev_size)
 800 {
 801     int tap_fd, if_fd, ppa = -1;
 802     static int ip_fd = 0;
 803     char *ptr;
 804
 805     static int arp_fd = 0;
 806     int ip_muxid, arp_muxid;
 807     struct strioctl  strioc_if, strioc_ppa;
 808     int link_type = I_PLINK;;
 809     struct lifreq ifr;
 810     char actual_name[32] = "";
 811
 812     memset(&ifr, 0x0, sizeof(ifr));
 813
 814     if( *dev ){
 815        ptr = dev;
 816        while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
 817        ppa = atoi(ptr);
 818     }
 819
 820     /* Check if IP device was opened */
 821     if( ip_fd )
 822        close(ip_fd);
 823
 824     TFR(ip_fd = open("/dev/udp", O_RDWR, 0));
 825     if (ip_fd < 0) {
 826        syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)");
 827        return -1;
 828     }
 829
 830     TFR(tap_fd = open("/dev/tap", O_RDWR, 0));
 831     if (tap_fd < 0) {
 832        syslog(LOG_ERR, "Can't open /dev/tap");
 833        return -1;
 834     }
 835
 836     /* Assign a new PPA and get its unit number. */
 837     strioc_ppa.ic_cmd = TUNNEWPPA;
 838     strioc_ppa.ic_timout = 0;
 839     strioc_ppa.ic_len = sizeof(ppa);
 840     strioc_ppa.ic_dp = (char *)&ppa;
 841     if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0)
 842        syslog (LOG_ERR, "Can't assign new interface");
 843
 844     TFR(if_fd = open("/dev/tap", O_RDWR, 0));
 845     if (if_fd < 0) {
 846        syslog(LOG_ERR, "Can't open /dev/tap (2)");
 847        return -1;
 848     }
 849     if(ioctl(if_fd, I_PUSH, "ip") < 0){
 850        syslog(LOG_ERR, "Can't push IP module");
 851        return -1;
 852     }
 853
 854     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0)
 855         syslog(LOG_ERR, "Can't get flags\n");
 856
 857     snprintf (actual_name, 32, "tap%d", ppa);
 858     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
 859
 860     ifr.lifr_ppa = ppa;
 861     /* Assign ppa according to the unit number returned by tun device */
 862
 863     if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0)
 864         syslog (LOG_ERR, "Can't set PPA %d", ppa);
 865     if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0)
 866         syslog (LOG_ERR, "Can't get flags\n");
 867     /* Push arp module to if_fd */
 868     if (ioctl (if_fd, I_PUSH, "arp") < 0)
 869         syslog (LOG_ERR, "Can't push ARP module (2)");
 870
 871     /* Push arp module to ip_fd */
 872     if (ioctl (ip_fd, I_POP, NULL) < 0)
 873         syslog (LOG_ERR, "I_POP failed\n");
 874     if (ioctl (ip_fd, I_PUSH, "arp") < 0)
 875         syslog (LOG_ERR, "Can't push ARP module (3)\n");
 876     /* Open arp_fd */
 877     TFR(arp_fd = open ("/dev/tap", O_RDWR, 0));
 878     if (arp_fd < 0)
 879        syslog (LOG_ERR, "Can't open %s\n", "/dev/tap");
 880
 881     /* Set ifname to arp */
 882     strioc_if.ic_cmd = SIOCSLIFNAME;
 883     strioc_if.ic_timout = 0;
 884     strioc_if.ic_len = sizeof(ifr);
 885     strioc_if.ic_dp = (char *)&ifr;
 886     if (ioctl(arp_fd, I_STR, &strioc_if) < 0){
 887         syslog (LOG_ERR, "Can't set ifname to arp\n");
 888     }
 889
 890     if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){
 891        syslog(LOG_ERR, "Can't link TAP device to IP");
 892        return -1;
 893     }
 894
 895     if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0)
 896         syslog (LOG_ERR, "Can't link TAP device to ARP");
 897
 898     close (if_fd);
 899
 900     memset(&ifr, 0x0, sizeof(ifr));
 901     pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name);
 902     ifr.lifr_ip_muxid  = ip_muxid;
 903     ifr.lifr_arp_muxid = arp_muxid;
 904
 905     if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0)
 906     {
 907       ioctl (ip_fd, I_PUNLINK , arp_muxid);
 908       ioctl (ip_fd, I_PUNLINK, ip_muxid);
 909       syslog (LOG_ERR, "Can't set multiplexor id");
 910     }
 911
 912     snprintf(dev, dev_size, "tap%d", ppa);
 913     return tap_fd;
 914 }
 915
 916 static int tap_open(char *ifname, int ifname_size)
 917 {
 918     char  dev[10]="";
 919     int fd;
 920     if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){
 921        fprintf(stderr, "Cannot allocate TAP device\n");
 922        return -1;
 923     }
 924     pstrcpy(ifname, ifname_size, dev);
 925     fcntl(fd, F_SETFL, O_NONBLOCK);
 926     return fd;
 927 }
 928 #elif defined (_AIX)
 929 static int tap_open(char *ifname, int ifname_size)
 930 {
 931     fprintf (stderr, "no tap on AIX\n");
 932     return -1;
 933 }
 934 #else
 935 static int tap_open(char *ifname, int ifname_size)
 936 {
 937     struct ifreq ifr;
 938     int fd, ret;
 939
 940     TFR(fd = open("/dev/net/tun", O_RDWR));
 941     if (fd < 0) {
 942         fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n");
 943         return -1;
 944     }
 945     memset(&ifr, 0, sizeof(ifr));
 946     ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
 947     if (ifname[0] != '\0')
 948         pstrcpy(ifr.ifr_name, IFNAMSIZ, ifname);
 949     else
 950         pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d");
 951     ret = ioctl(fd, TUNSETIFF, (void *) &ifr);
 952     if (ret != 0) {
 953         fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n");
 954         close(fd);
 955         return -1;
 956     }
 957     pstrcpy(ifname, ifname_size, ifr.ifr_name);
 958     fcntl(fd, F_SETFL, O_NONBLOCK);
 959     return fd;
 960 }
 961 #endif
 962
 963 static int launch_script(const char *setup_script, const char *ifname, int fd)
 964 {
 965     int pid, status;
 966     char *args[3];
 967     char **parg;
 968
 969         /* try to launch network script */
 970         pid = fork();
 971         if (pid >= 0) {
 972             if (pid == 0) {
 973                 int open_max = sysconf (_SC_OPEN_MAX), i;
 974                 for (i = 0; i < open_max; i++)
 975                     if (i != STDIN_FILENO &&
 976                         i != STDOUT_FILENO &&
 977                         i != STDERR_FILENO &&
 978                         i != fd)
 979                         close(i);
 980
 981                 parg = args;
 982                 *parg++ = (char *)setup_script;
 983                 *parg++ = (char *)ifname;
 984                 *parg++ = NULL;
 985                 execv(setup_script, args);
 986                 _exit(1);
 987             }
 988             while (waitpid(pid, &status, 0) != pid);
 989             if (!WIFEXITED(status) ||
 990                 WEXITSTATUS(status) != 0) {
 991                 fprintf(stderr, "%s: could not launch network script\n",
 992                         setup_script);
 993                 return -1;
 994             }
 995         }
 996     return 0;
 997 }
 998
 999 static int net_tap_init(VLANState *vlan, const char *model,
1000                         const char *name, const char *ifname1,
1001                         const char *setup_script, const char *down_script)
1002 {
1003     TAPState *s;
1004     int fd;
1005     char ifname[128];
1006
1007     if (ifname1 != NULL)
1008         pstrcpy(ifname, sizeof(ifname), ifname1);
1009     else
1010         ifname[0] = '\0';
1011     TFR(fd = tap_open(ifname, sizeof(ifname)));
1012     if (fd < 0)
1013         return -1;
1014
1015     if (!setup_script || !strcmp(setup_script, "no"))
1016         setup_script = "";
1017     if (setup_script[0] != '\0') {
1018         if (launch_script(setup_script, ifname, fd))
1019             return -1;
1020     }
1021     s = net_tap_fd_init(vlan, model, name, fd);
1022     if (!s)
1023         return -1;
1024     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1025              "ifname=%s,script=%s,downscript=%s",
1026              ifname, setup_script, down_script);
1027     if (down_script && strcmp(down_script, "no")) {
1028         snprintf(s->down_script, sizeof(s->down_script), "%s", down_script);
1029         snprintf(s->down_script_arg, sizeof(s->down_script_arg), "%s", ifname);
1030     }
1031     return 0;
1032 }
1033
1034 #endif /* !_WIN32 */
1035
1036 #if defined(CONFIG_VDE)
1037 typedef struct VDEState {
1038     VLANClientState *vc;
1039     VDECONN *vde;
1040 } VDEState;
1041
1042 static void vde_to_qemu(void *opaque)
1043 {
1044     VDEState *s = opaque;
1045     uint8_t buf[4096];
1046     int size;
1047
1048     size = vde_recv(s->vde, buf, sizeof(buf), 0);
1049     if (size > 0) {
1050         qemu_send_packet(s->vc, buf, size);
1051     }
1052 }
1053
1054 static void vde_from_qemu(void *opaque, const uint8_t *buf, int size)
1055 {
1056     VDEState *s = opaque;
1057     int ret;
1058     for(;;) {
1059         ret = vde_send(s->vde, buf, size, 0);
1060         if (ret < 0 && errno == EINTR) {
1061         } else {
1062             break;
1063         }
1064     }
1065 }
1066
1067 static int net_vde_init(VLANState *vlan, const char *model,
1068                         const char *name, const char *sock,
1069                         int port, const char *group, int mode)
1070 {
1071     VDEState *s;
1072     char *init_group = strlen(group) ? (char *)group : NULL;
1073     char *init_sock = strlen(sock) ? (char *)sock : NULL;
1074
1075     struct vde_open_args args = {
1076         .port = port,
1077         .group = init_group,
1078         .mode = mode,
1079     };
1080
1081     s = qemu_mallocz(sizeof(VDEState));
1082     s->vde = vde_open(init_sock, "QEMU", &args);
1083     if (!s->vde){
1084         free(s);
1085         return -1;
1086     }
1087     s->vc = qemu_new_vlan_client(vlan, model, name, vde_from_qemu, NULL, s);
1088     qemu_set_fd_handler(vde_datafd(s->vde), vde_to_qemu, NULL, s);
1089     snprintf(s->vc->info_str, sizeof(s->vc->info_str), "sock=%s,fd=%d",
1090              sock, vde_datafd(s->vde));
1091     return 0;
1092 }
1093 #endif
1094
1095 /* network connection */
1096 typedef struct NetSocketState {
1097     VLANClientState *vc;
1098     int fd;
1099     int state; /* 0 = getting length, 1 = getting data */
1100     unsigned int index;
1101     unsigned int packet_len;
1102     uint8_t buf[4096];
1103     struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */
1104 } NetSocketState;
1105
1106 typedef struct NetSocketListenState {
1107     VLANState *vlan;
1108     char *model;
1109     char *name;
1110     int fd;
1111 } NetSocketListenState;
1112
1113 /* XXX: we consider we can send the whole packet without blocking */
1114 static void net_socket_receive(void *opaque, const uint8_t *buf, int size)
1115 {
1116     NetSocketState *s = opaque;
1117     uint32_t len;
1118     len = htonl(size);
1119
1120     send_all(s->fd, (const uint8_t *)&len, sizeof(len));
1121     send_all(s->fd, buf, size);
1122 }
1123
1124 static void net_socket_receive_dgram(void *opaque, const uint8_t *buf, int size)
1125 {
1126     NetSocketState *s = opaque;
1127     sendto(s->fd, buf, size, 0,
1128            (struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst));
1129 }
1130
1131 static void net_socket_send(void *opaque)
1132 {
1133     NetSocketState *s = opaque;
1134     int size, err;
1135     unsigned l;
1136     uint8_t buf1[4096];
1137     const uint8_t *buf;
1138
1139     size = recv(s->fd, buf1, sizeof(buf1), 0);
1140     if (size < 0) {
1141         err = socket_error();
1142         if (err != EWOULDBLOCK)
1143             goto eoc;
1144     } else if (size == 0) {
1145         /* end of connection */
1146     eoc:
1147         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1148         closesocket(s->fd);
1149         return;
1150     }
1151     buf = buf1;
1152     while (size > 0) {
1153         /* reassemble a packet from the network */
1154         switch(s->state) {
1155         case 0:
1156             l = 4 - s->index;
1157             if (l > size)
1158                 l = size;
1159             memcpy(s->buf + s->index, buf, l);
1160             buf += l;
1161             size -= l;
1162             s->index += l;
1163             if (s->index == 4) {
1164                 /* got length */
1165                 s->packet_len = ntohl(*(uint32_t *)s->buf);
1166                 s->index = 0;
1167                 s->state = 1;
1168             }
1169             break;
1170         case 1:
1171             l = s->packet_len - s->index;
1172             if (l > size)
1173                 l = size;
1174             if (s->index + l <= sizeof(s->buf)) {
1175                 memcpy(s->buf + s->index, buf, l);
1176             } else {
1177                 fprintf(stderr, "serious error: oversized packet received,"
1178                     "connection terminated.\n");
1179                 s->state = 0;
1180                 goto eoc;
1181             }
1182
1183             s->index += l;
1184             buf += l;
1185             size -= l;
1186             if (s->index >= s->packet_len) {
1187                 qemu_send_packet(s->vc, s->buf, s->packet_len);
1188                 s->index = 0;
1189                 s->state = 0;
1190             }
1191             break;
1192         }
1193     }
1194 }
1195
1196 static void net_socket_send_dgram(void *opaque)
1197 {
1198     NetSocketState *s = opaque;
1199     int size;
1200
1201     size = recv(s->fd, s->buf, sizeof(s->buf), 0);
1202     if (size < 0)
1203         return;
1204     if (size == 0) {
1205         /* end of connection */
1206         qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
1207         return;
1208     }
1209     qemu_send_packet(s->vc, s->buf, size);
1210 }
1211
1212 static int net_socket_mcast_create(struct sockaddr_in *mcastaddr)
1213 {
1214     struct ip_mreq imr;
1215     int fd;
1216     int val, ret;
1217     if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) {
1218         fprintf(stderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) does not contain a multicast address\n",
1219                 inet_ntoa(mcastaddr->sin_addr),
1220                 (int)ntohl(mcastaddr->sin_addr.s_addr));
1221         return -1;
1222
1223     }
1224     fd = socket(PF_INET, SOCK_DGRAM, 0);
1225     if (fd < 0) {
1226         perror("socket(PF_INET, SOCK_DGRAM)");
1227         return -1;
1228     }
1229
1230     val = 1;
1231     ret=setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
1232                    (const char *)&val, sizeof(val));
1233     if (ret < 0) {
1234         perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
1235         goto fail;
1236     }
1237
1238     ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
1239     if (ret < 0) {
1240         perror("bind");
1241         goto fail;
1242     }
1243
1244     /* Add host to multicast group */
1245     imr.imr_multiaddr = mcastaddr->sin_addr;
1246     imr.imr_interface.s_addr = htonl(INADDR_ANY);
1247
1248     ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
1249                      (const char *)&imr, sizeof(struct ip_mreq));
1250     if (ret < 0) {
1251         perror("setsockopt(IP_ADD_MEMBERSHIP)");
1252         goto fail;
1253     }
1254
1255     /* Force mcast msgs to loopback (eg. several QEMUs in same host */
1256     val = 1;
1257     ret=setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP,
1258                    (const char *)&val, sizeof(val));
1259     if (ret < 0) {
1260         perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
1261         goto fail;
1262     }
1263
1264     socket_set_nonblock(fd);
1265     return fd;
1266 fail:
1267     if (fd >= 0)
1268         closesocket(fd);
1269     return -1;
1270 }
1271
1272 static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
1273                                                 const char *model,
1274                                                 const char *name,
1275                                                 int fd, int is_connected)
1276 {
1277     struct sockaddr_in saddr;
1278     int newfd;
1279     socklen_t saddr_len;
1280     NetSocketState *s;
1281
1282     /* fd passed: multicast: "learn" dgram_dst address from bound address and save it
1283      * Because this may be "shared" socket from a "master" process, datagrams would be recv()
1284      * by ONLY ONE process: we must "clone" this dgram socket --jjo
1285      */
1286
1287     if (is_connected) {
1288         if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
1289             /* must be bound */
1290             if (saddr.sin_addr.s_addr==0) {
1291                 fprintf(stderr, "qemu: error: init_dgram: fd=%d unbound, cannot setup multicast dst addr\n",
1292                         fd);
1293                 return NULL;
1294             }
1295             /* clone dgram socket */
1296             newfd = net_socket_mcast_create(&saddr);
1297             if (newfd < 0) {
1298                 /* error already reported by net_socket_mcast_create() */
1299                 close(fd);
1300                 return NULL;
1301             }
1302             /* clone newfd to fd, close newfd */
1303             dup2(newfd, fd);
1304             close(newfd);
1305
1306         } else {
1307             fprintf(stderr, "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
1308                     fd, strerror(errno));
1309             return NULL;
1310         }
1311     }
1312
1313     s = qemu_mallocz(sizeof(NetSocketState));
1314     s->fd = fd;
1315
1316     s->vc = qemu_new_vlan_client(vlan, model, name, net_socket_receive_dgram, NULL, s);
1317     qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL, s);
1318
1319     /* mcast: save bound address as dst */
1320     if (is_connected) s->dgram_dst=saddr;
1321
1322     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1323             "socket: fd=%d (%s mcast=%s:%d)",
1324             fd, is_connected? "cloned" : "",
1325             inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1326     return s;
1327 }
1328
1329 static void net_socket_connect(void *opaque)
1330 {
1331     NetSocketState *s = opaque;
1332     qemu_set_fd_handler(s->fd, net_socket_send, NULL, s);
1333 }
1334
1335 static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
1336                                                  const char *model,
1337                                                  const char *name,
1338                                                  int fd, int is_connected)
1339 {
1340     NetSocketState *s;
1341     s = qemu_mallocz(sizeof(NetSocketState));
1342     s->fd = fd;
1343     s->vc = qemu_new_vlan_client(vlan, model, name,
1344                                  net_socket_receive, NULL, s);
1345     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1346              "socket: fd=%d", fd);
1347     if (is_connected) {
1348         net_socket_connect(s);
1349     } else {
1350         qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s);
1351     }
1352     return s;
1353 }
1354
1355 static NetSocketState *net_socket_fd_init(VLANState *vlan,
1356                                           const char *model, const char *name,
1357                                           int fd, int is_connected)
1358 {
1359     int so_type=-1, optlen=sizeof(so_type);
1360
1361     if(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type,
1362         (socklen_t *)&optlen)< 0) {
1363         fprintf(stderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n", fd);
1364         return NULL;
1365     }
1366     switch(so_type) {
1367     case SOCK_DGRAM:
1368         return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected);
1369     case SOCK_STREAM:
1370         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1371     default:
1372         /* who knows ... this could be a eg. a pty, do warn and continue as stream */
1373         fprintf(stderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
1374         return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
1375     }
1376     return NULL;
1377 }
1378
1379 static void net_socket_accept(void *opaque)
1380 {
1381     NetSocketListenState *s = opaque;
1382     NetSocketState *s1;
1383     struct sockaddr_in saddr;
1384     socklen_t len;
1385     int fd;
1386
1387     for(;;) {
1388         len = sizeof(saddr);
1389         fd = accept(s->fd, (struct sockaddr *)&saddr, &len);
1390         if (fd < 0 && errno != EINTR) {
1391             return;
1392         } else if (fd >= 0) {
1393             break;
1394         }
1395     }
1396     s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1);
1397     if (!s1) {
1398         closesocket(fd);
1399     } else {
1400         snprintf(s1->vc->info_str, sizeof(s1->vc->info_str),
1401                  "socket: connection from %s:%d",
1402                  inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1403     }
1404 }
1405
1406 static int net_socket_listen_init(VLANState *vlan,
1407                                   const char *model,
1408                                   const char *name,
1409                                   const char *host_str)
1410 {
1411     NetSocketListenState *s;
1412     int fd, val, ret;
1413     struct sockaddr_in saddr;
1414
1415     if (parse_host_port(&saddr, host_str) < 0)
1416         return -1;
1417
1418     s = qemu_mallocz(sizeof(NetSocketListenState));
1419
1420     fd = socket(PF_INET, SOCK_STREAM, 0);
1421     if (fd < 0) {
1422         perror("socket");
1423         return -1;
1424     }
1425     socket_set_nonblock(fd);
1426
1427     /* allow fast reuse */
1428     val = 1;
1429     setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char *)&val, sizeof(val));
1430
1431     ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
1432     if (ret < 0) {
1433         perror("bind");
1434         return -1;
1435     }
1436     ret = listen(fd, 0);
1437     if (ret < 0) {
1438         perror("listen");
1439         return -1;
1440     }
1441     s->vlan = vlan;
1442     s->model = strdup(model);
1443     s->name = strdup(name);
1444     s->fd = fd;
1445     qemu_set_fd_handler(fd, net_socket_accept, NULL, s);
1446     return 0;
1447 }
1448
1449 static int net_socket_connect_init(VLANState *vlan,
1450                                    const char *model,
1451                                    const char *name,
1452                                    const char *host_str)
1453 {
1454     NetSocketState *s;
1455     int fd, connected, ret, err;
1456     struct sockaddr_in saddr;
1457
1458     if (parse_host_port(&saddr, host_str) < 0)
1459         return -1;
1460
1461     fd = socket(PF_INET, SOCK_STREAM, 0);
1462     if (fd < 0) {
1463         perror("socket");
1464         return -1;
1465     }
1466     socket_set_nonblock(fd);
1467
1468     connected = 0;
1469     for(;;) {
1470         ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
1471         if (ret < 0) {
1472             err = socket_error();
1473             if (err == EINTR || err == EWOULDBLOCK) {
1474             } else if (err == EINPROGRESS) {
1475                 break;
1476 #ifdef _WIN32
1477             } else if (err == WSAEALREADY) {
1478                 break;
1479 #endif
1480             } else {
1481                 perror("connect");
1482                 closesocket(fd);
1483                 return -1;
1484             }
1485         } else {
1486             connected = 1;
1487             break;
1488         }
1489     }
1490     s = net_socket_fd_init(vlan, model, name, fd, connected);
1491     if (!s)
1492         return -1;
1493     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1494              "socket: connect to %s:%d",
1495              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1496     return 0;
1497 }
1498
1499 static int net_socket_mcast_init(VLANState *vlan,
1500                                  const char *model,
1501                                  const char *name,
1502                                  const char *host_str)
1503 {
1504     NetSocketState *s;
1505     int fd;
1506     struct sockaddr_in saddr;
1507
1508     if (parse_host_port(&saddr, host_str) < 0)
1509         return -1;
1510
1511
1512     fd = net_socket_mcast_create(&saddr);
1513     if (fd < 0)
1514         return -1;
1515
1516     s = net_socket_fd_init(vlan, model, name, fd, 0);
1517     if (!s)
1518         return -1;
1519
1520     s->dgram_dst = saddr;
1521
1522     snprintf(s->vc->info_str, sizeof(s->vc->info_str),
1523              "socket: mcast=%s:%d",
1524              inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
1525     return 0;
1526
1527 }
1528
1529 /* find or alloc a new VLAN */
1530 VLANState *qemu_find_vlan(int id)
1531 {
1532     VLANState **pvlan, *vlan;
1533     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1534         if (vlan->id == id)
1535             return vlan;
1536     }
1537     vlan = qemu_mallocz(sizeof(VLANState));
1538     vlan->id = id;
1539     vlan->next = NULL;
1540     pvlan = &first_vlan;
1541     while (*pvlan != NULL)
1542         pvlan = &(*pvlan)->next;
1543     *pvlan = vlan;
1544     return vlan;
1545 }
1546
1547 static int nic_get_free_idx(void)
1548 {
1549     int index;
1550
1551     for (index = 0; index < MAX_NICS; index++)
1552         if (!nd_table[index].used)
1553             return index;
1554     return -1;
1555 }
1556
1557 void qemu_check_nic_model(NICInfo *nd, const char *model)
1558 {
1559     const char *models[2];
1560
1561     models[0] = model;
1562     models[1] = NULL;
1563
1564     qemu_check_nic_model_list(nd, models, model);
1565 }
1566
1567 void qemu_check_nic_model_list(NICInfo *nd, const char * const *models,
1568                                const char *default_model)
1569 {
1570     int i, exit_status = 0;
1571
1572     if (!nd->model)
1573         nd->model = strdup(default_model);
1574
1575     if (strcmp(nd->model, "?") != 0) {
1576         for (i = 0 ; models[i]; i++)
1577             if (strcmp(nd->model, models[i]) == 0)
1578                 return;
1579
1580         fprintf(stderr, "qemu: Unsupported NIC model: %s\n", nd->model);
1581         exit_status = 1;
1582     }
1583
1584     fprintf(stderr, "qemu: Supported NIC models: ");
1585     for (i = 0 ; models[i]; i++)
1586         fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
1587
1588     exit(exit_status);
1589 }
1590
1591 int net_client_init(const char *device, const char *p)
1592 {
1593     char buf[1024];
1594     int vlan_id, ret;
1595     VLANState *vlan;
1596     char *name = NULL;
1597
1598     vlan_id = 0;
1599     if (get_param_value(buf, sizeof(buf), "vlan", p)) {
1600         vlan_id = strtol(buf, NULL, 0);
1601     }
1602     vlan = qemu_find_vlan(vlan_id);
1603     if (!vlan) {
1604         fprintf(stderr, "Could not create vlan %d\n", vlan_id);
1605         return -1;
1606     }
1607     if (get_param_value(buf, sizeof(buf), "name", p)) {
1608         name = strdup(buf);
1609     }
1610     if (!strcmp(device, "nic")) {
1611         NICInfo *nd;
1612         uint8_t *macaddr;
1613         int idx = nic_get_free_idx();
1614
1615         if (idx == -1 || nb_nics >= MAX_NICS) {
1616             fprintf(stderr, "Too Many NICs\n");
1617             return -1;
1618         }
1619         nd = &nd_table[idx];
1620         macaddr = nd->macaddr;
1621         macaddr[0] = 0x52;
1622         macaddr[1] = 0x54;
1623         macaddr[2] = 0x00;
1624         macaddr[3] = 0x12;
1625         macaddr[4] = 0x34;
1626         macaddr[5] = 0x56 + idx;
1627
1628         if (get_param_value(buf, sizeof(buf), "macaddr", p)) {
1629             if (parse_macaddr(macaddr, buf) < 0) {
1630                 fprintf(stderr, "invalid syntax for ethernet address\n");
1631                 return -1;
1632             }
1633         }
1634         if (get_param_value(buf, sizeof(buf), "model", p)) {
1635             nd->model = strdup(buf);
1636         }
1637         nd->vlan = vlan;
1638         nd->name = name;
1639         nd->used = 1;
1640         name = NULL;
1641         nb_nics++;
1642         vlan->nb_guest_devs++;
1643         ret = idx;
1644     } else
1645     if (!strcmp(device, "none")) {
1646         /* does nothing. It is needed to signal that no network cards
1647            are wanted */
1648         ret = 0;
1649     } else
1650 #ifdef CONFIG_SLIRP
1651     if (!strcmp(device, "user")) {
1652         if (get_param_value(buf, sizeof(buf), "hostname", p)) {
1653             pstrcpy(slirp_hostname, sizeof(slirp_hostname), buf);
1654         }
1655         if (get_param_value(buf, sizeof(buf), "restrict", p)) {
1656             slirp_restrict = (buf[0] == 'y') ? 1 : 0;
1657         }
1658         if (get_param_value(buf, sizeof(buf), "ip", p)) {
1659             slirp_ip = strdup(buf);
1660         }
1661         vlan->nb_host_devs++;
1662         ret = net_slirp_init(vlan, device, name);
1663     } else if (!strcmp(device, "channel")) {
1664         long port;
1665         char name[20], *devname;
1666         struct VMChannel *vmc;
1667
1668         port = strtol(p, &devname, 10);
1669         devname++;
1670         if (port < 1 || port > 65535) {
1671             fprintf(stderr, "vmchannel wrong port number\n");
1672             return -1;
1673         }
1674         vmc = malloc(sizeof(struct VMChannel));
1675         snprintf(name, 20, "vmchannel%ld", port);
1676         vmc->hd = qemu_chr_open(name, devname, NULL);
1677         if (!vmc->hd) {
1678             fprintf(stderr, "qemu: could not open vmchannel device"
1679                     "'%s'\n", devname);
1680             return -1;
1681         }
1682         vmc->port = port;
1683         slirp_add_exec(3, vmc->hd, 4, port);
1684         qemu_chr_add_handlers(vmc->hd, vmchannel_can_read, vmchannel_read,
1685                 NULL, vmc);
1686         ret = 0;
1687     } else
1688 #endif
1689 #ifdef _WIN32
1690     if (!strcmp(device, "tap")) {
1691         char ifname[64];
1692         if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
1693             fprintf(stderr, "tap: no interface name\n");
1694             return -1;
1695         }
1696         vlan->nb_host_devs++;
1697         ret = tap_win32_init(vlan, device, name, ifname);
1698     } else
1699 #elif defined (_AIX)
1700 #else
1701     if (!strcmp(device, "tap")) {
1702         char ifname[64];
1703         char setup_script[1024], down_script[1024];
1704         int fd;
1705         vlan->nb_host_devs++;
1706         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
1707             fd = strtol(buf, NULL, 0);
1708             fcntl(fd, F_SETFL, O_NONBLOCK);
1709             ret = -1;
1710             if (net_tap_fd_init(vlan, device, name, fd))
1711                 ret = 0;
1712         } else {
1713             if (get_param_value(ifname, sizeof(ifname), "ifname", p) <= 0) {
1714                 ifname[0] = '\0';
1715             }
1716             if (get_param_value(setup_script, sizeof(setup_script), "script", p) == 0) {
1717                 pstrcpy(setup_script, sizeof(setup_script), DEFAULT_NETWORK_SCRIPT);
1718             }
1719             if (get_param_value(down_script, sizeof(down_script), "downscript", p) == 0) {
1720                 pstrcpy(down_script, sizeof(down_script), DEFAULT_NETWORK_DOWN_SCRIPT);
1721             }
1722             ret = net_tap_init(vlan, device, name, ifname, setup_script, down_script);
1723         }
1724     } else
1725 #endif
1726     if (!strcmp(device, "socket")) {
1727         if (get_param_value(buf, sizeof(buf), "fd", p) > 0) {
1728             int fd;
1729             fd = strtol(buf, NULL, 0);
1730             ret = -1;
1731             if (net_socket_fd_init(vlan, device, name, fd, 1))
1732                 ret = 0;
1733         } else if (get_param_value(buf, sizeof(buf), "listen", p) > 0) {
1734             ret = net_socket_listen_init(vlan, device, name, buf);
1735         } else if (get_param_value(buf, sizeof(buf), "connect", p) > 0) {
1736             ret = net_socket_connect_init(vlan, device, name, buf);
1737         } else if (get_param_value(buf, sizeof(buf), "mcast", p) > 0) {
1738             ret = net_socket_mcast_init(vlan, device, name, buf);
1739         } else {
1740             fprintf(stderr, "Unknown socket options: %s\n", p);
1741             return -1;
1742         }
1743         vlan->nb_host_devs++;
1744     } else
1745 #ifdef CONFIG_VDE
1746     if (!strcmp(device, "vde")) {
1747         char vde_sock[1024], vde_group[512];
1748         int vde_port, vde_mode;
1749         vlan->nb_host_devs++;
1750         if (get_param_value(vde_sock, sizeof(vde_sock), "sock", p) <= 0) {
1751             vde_sock[0] = '\0';
1752         }
1753         if (get_param_value(buf, sizeof(buf), "port", p) > 0) {
1754             vde_port = strtol(buf, NULL, 10);
1755         } else {
1756             vde_port = 0;
1757         }
1758         if (get_param_value(vde_group, sizeof(vde_group), "group", p) <= 0) {
1759             vde_group[0] = '\0';
1760         }
1761         if (get_param_value(buf, sizeof(buf), "mode", p) > 0) {
1762             vde_mode = strtol(buf, NULL, 8);
1763         } else {
1764             vde_mode = 0700;
1765         }
1766         ret = net_vde_init(vlan, device, name, vde_sock, vde_port, vde_group, vde_mode);
1767     } else
1768 #endif
1769     {
1770         fprintf(stderr, "Unknown network device: %s\n", device);
1771         if (name)
1772             free(name);
1773         return -1;
1774     }
1775     if (ret < 0) {
1776         fprintf(stderr, "Could not initialize device '%s'\n", device);
1777     }
1778     if (name)
1779         free(name);
1780     return ret;
1781 }
1782
1783 void net_client_uninit(NICInfo *nd)
1784 {
1785     nd->vlan->nb_guest_devs--;
1786     nb_nics--;
1787     nd->used = 0;
1788     free((void *)nd->model);
1789 }
1790
1791 static int net_host_check_device(const char *device)
1792 {
1793     int i;
1794     const char *valid_param_list[] = { "tap", "socket"
1795 #ifdef CONFIG_SLIRP
1796                                        ,"user"
1797 #endif
1798 #ifdef CONFIG_VDE
1799                                        ,"vde"
1800 #endif
1801     };
1802     for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) {
1803         if (!strncmp(valid_param_list[i], device,
1804                      strlen(valid_param_list[i])))
1805             return 1;
1806     }
1807
1808     return 0;
1809 }
1810
1811 void net_host_device_add(Monitor *mon, const char *device, const char *opts)
1812 {
1813     if (!net_host_check_device(device)) {
1814         monitor_printf(mon, "invalid host network device %s\n", device);
1815         return;
1816     }
1817     net_client_init(device, opts);
1818 }
1819
1820 void net_host_device_remove(Monitor *mon, int vlan_id, const char *device)
1821 {
1822     VLANState *vlan;
1823     VLANClientState *vc;
1824
1825     vlan = qemu_find_vlan(vlan_id);
1826     if (!vlan) {
1827         monitor_printf(mon, "can't find vlan %d\n", vlan_id);
1828         return;
1829     }
1830
1831    for(vc = vlan->first_client; vc != NULL; vc = vc->next)
1832         if (!strcmp(vc->name, device))
1833             break;
1834
1835     if (!vc) {
1836         monitor_printf(mon, "can't find device %s\n", device);
1837         return;
1838     }
1839     qemu_del_vlan_client(vc);
1840 }
1841
1842 int net_client_parse(const char *str)
1843 {
1844     const char *p;
1845     char *q;
1846     char device[64];
1847
1848     p = str;
1849     q = device;
1850     while (*p != '\0' && *p != ',') {
1851         if ((q - device) < sizeof(device) - 1)
1852             *q++ = *p;
1853         p++;
1854     }
1855     *q = '\0';
1856     if (*p == ',')
1857         p++;
1858
1859     return net_client_init(device, p);
1860 }
1861
1862 void do_info_network(Monitor *mon)
1863 {
1864     VLANState *vlan;
1865     VLANClientState *vc;
1866
1867     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1868         monitor_printf(mon, "VLAN %d devices:\n", vlan->id);
1869         for(vc = vlan->first_client; vc != NULL; vc = vc->next)
1870             monitor_printf(mon, "  %s: %s\n", vc->name, vc->info_str);
1871     }
1872 }
1873
1874 int do_set_link(Monitor *mon, const char *name, const char *up_or_down)
1875 {
1876     VLANState *vlan;
1877     VLANClientState *vc = NULL;
1878
1879     for (vlan = first_vlan; vlan != NULL; vlan = vlan->next)
1880         for (vc = vlan->first_client; vc != NULL; vc = vc->next)
1881             if (strcmp(vc->name, name) == 0)
1882                 goto done;
1883 done:
1884
1885     if (!vc) {
1886         monitor_printf(mon, "could not find network device '%s'", name);
1887         return 0;
1888     }
1889
1890     if (strcmp(up_or_down, "up") == 0)
1891         vc->link_down = 0;
1892     else if (strcmp(up_or_down, "down") == 0)
1893         vc->link_down = 1;
1894     else
1895         monitor_printf(mon, "invalid link status '%s'; only 'up' or 'down' "
1896                        "valid\n", up_or_down);
1897
1898     if (vc->link_status_changed)
1899         vc->link_status_changed(vc);
1900
1901     return 1;
1902 }
1903
1904 void net_cleanup(void)
1905 {
1906     VLANState *vlan;
1907
1908 #if !defined(_WIN32)
1909     /* close network clients */
1910     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1911         VLANClientState *vc;
1912
1913         for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
1914             if (vc->fd_read == tap_receive) {
1915                 TAPState *s = vc->opaque;
1916
1917                 if (s->down_script[0])
1918                     launch_script(s->down_script, s->down_script_arg, s->fd);
1919             }
1920 #if defined(CONFIG_VDE)
1921             if (vc->fd_read == vde_from_qemu) {
1922                 VDEState *s = vc->opaque;
1923                 vde_close(s->vde);
1924             }
1925 #endif
1926         }
1927     }
1928 #endif
1929 }
1930
1931 void net_client_check(void)
1932 {
1933     VLANState *vlan;
1934
1935     for(vlan = first_vlan; vlan != NULL; vlan = vlan->next) {
1936         if (vlan->nb_guest_devs == 0 && vlan->nb_host_devs == 0)
1937             continue;
1938         if (vlan->nb_guest_devs == 0)
1939             fprintf(stderr, "Warning: vlan %d with no nics\n", vlan->id);
1940         if (vlan->nb_host_devs == 0)
1941             fprintf(stderr,
1942                     "Warning: vlan %d is not connected to host network\n",
1943                     vlan->id);
1944     }
1945 }