qemu-sockets.c

   1 /*
   2  *  inet and unix socket functions for qemu
   3  *
   4  *  (c) 2008 Gerd Hoffmann <kraxel@redhat.com>
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; under version 2 of the License.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  * Contributions after 2012-01-13 are licensed under the terms of the
  16  * GNU GPL, version 2 or (at your option) any later version.
  17  */
  18 #include <stdio.h>
  19 #include <stdlib.h>
  20 #include <string.h>
  21 #include <ctype.h>
  22 #include <errno.h>
  23 #include <unistd.h>
  24
  25 #include "qemu_socket.h"
  26 #include "qemu-common.h" /* for qemu_isdigit */
  27
  28 #ifndef AI_ADDRCONFIG
  29 # define AI_ADDRCONFIG 0
  30 #endif
  31
  32 static const int on=1, off=0;
  33
  34 /* used temporarely until all users are converted to QemuOpts */
  35 static QemuOptsList dummy_opts = {
  36     .name = "dummy",
  37     .head = QTAILQ_HEAD_INITIALIZER(dummy_opts.head),
  38     .desc = {
  39         {
  40             .name = "path",
  41             .type = QEMU_OPT_STRING,
  42         },{
  43             .name = "host",
  44             .type = QEMU_OPT_STRING,
  45         },{
  46             .name = "port",
  47             .type = QEMU_OPT_STRING,
  48         },{
  49             .name = "to",
  50             .type = QEMU_OPT_NUMBER,
  51         },{
  52             .name = "ipv4",
  53             .type = QEMU_OPT_BOOL,
  54         },{
  55             .name = "ipv6",
  56             .type = QEMU_OPT_BOOL,
  57         },{
  58             .name = "block",
  59             .type = QEMU_OPT_BOOL,
  60         },
  61         { /* end if list */ }
  62     },
  63 };
  64
  65 static int inet_getport(struct addrinfo *e)
  66 {
  67     struct sockaddr_in *i4;
  68     struct sockaddr_in6 *i6;
  69
  70     switch (e->ai_family) {
  71     case PF_INET6:
  72         i6 = (void*)e->ai_addr;
  73         return ntohs(i6->sin6_port);
  74     case PF_INET:
  75         i4 = (void*)e->ai_addr;
  76         return ntohs(i4->sin_port);
  77     default:
  78         return 0;
  79     }
  80 }
  81
  82 static void inet_setport(struct addrinfo *e, int port)
  83 {
  84     struct sockaddr_in *i4;
  85     struct sockaddr_in6 *i6;
  86
  87     switch (e->ai_family) {
  88     case PF_INET6:
  89         i6 = (void*)e->ai_addr;
  90         i6->sin6_port = htons(port);
  91         break;
  92     case PF_INET:
  93         i4 = (void*)e->ai_addr;
  94         i4->sin_port = htons(port);
  95         break;
  96     }
  97 }
  98
  99 const char *inet_strfamily(int family)
 100 {
 101     switch (family) {
 102     case PF_INET6: return "ipv6";
 103     case PF_INET:  return "ipv4";
 104     case PF_UNIX:  return "unix";
 105     }
 106     return "unknown";
 107 }
 108
 109 int inet_listen_opts(QemuOpts *opts, int port_offset, Error **errp)
 110 {
 111     struct addrinfo ai,*res,*e;
 112     const char *addr;
 113     char port[33];
 114     char uaddr[INET6_ADDRSTRLEN+1];
 115     char uport[33];
 116     int slisten, rc, to, port_min, port_max, p;
 117
 118     memset(&ai,0, sizeof(ai));
 119     ai.ai_flags = AI_PASSIVE | AI_ADDRCONFIG;
 120     ai.ai_family = PF_UNSPEC;
 121     ai.ai_socktype = SOCK_STREAM;
 122
 123     if ((qemu_opt_get(opts, "host") == NULL) ||
 124         (qemu_opt_get(opts, "port") == NULL)) {
 125         fprintf(stderr, "%s: host and/or port not specified\n", __FUNCTION__);
 126         error_set(errp, QERR_SOCKET_CREATE_FAILED);
 127         return -1;
 128     }
 129     pstrcpy(port, sizeof(port), qemu_opt_get(opts, "port"));
 130     addr = qemu_opt_get(opts, "host");
 131
 132     to = qemu_opt_get_number(opts, "to", 0);
 133     if (qemu_opt_get_bool(opts, "ipv4", 0))
 134         ai.ai_family = PF_INET;
 135     if (qemu_opt_get_bool(opts, "ipv6", 0))
 136         ai.ai_family = PF_INET6;
 137
 138     /* lookup */
 139     if (port_offset)
 140         snprintf(port, sizeof(port), "%d", atoi(port) + port_offset);
 141     rc = getaddrinfo(strlen(addr) ? addr : NULL, port, &ai, &res);
 142     if (rc != 0) {
 143         fprintf(stderr,"getaddrinfo(%s,%s): %s\n", addr, port,
 144                 gai_strerror(rc));
 145         error_set(errp, QERR_SOCKET_CREATE_FAILED);
 146         return -1;
 147     }
 148
 149     /* create socket + bind */
 150     for (e = res; e != NULL; e = e->ai_next) {
 151         getnameinfo((struct sockaddr*)e->ai_addr,e->ai_addrlen,
 152                         uaddr,INET6_ADDRSTRLEN,uport,32,
 153                         NI_NUMERICHOST | NI_NUMERICSERV);
 154         slisten = qemu_socket(e->ai_family, e->ai_socktype, e->ai_protocol);
 155         if (slisten < 0) {
 156             fprintf(stderr,"%s: socket(%s): %s\n", __FUNCTION__,
 157                     inet_strfamily(e->ai_family), strerror(errno));
 158             if (!e->ai_next) {
 159                 error_set(errp, QERR_SOCKET_CREATE_FAILED);
 160             }
 161             continue;
 162         }
 163
 164         setsockopt(slisten,SOL_SOCKET,SO_REUSEADDR,(void*)&on,sizeof(on));
 165 #ifdef IPV6_V6ONLY
 166         if (e->ai_family == PF_INET6) {
 167             /* listen on both ipv4 and ipv6 */
 168             setsockopt(slisten,IPPROTO_IPV6,IPV6_V6ONLY,(void*)&off,
 169                 sizeof(off));
 170         }
 171 #endif
 172
 173         port_min = inet_getport(e);
 174         port_max = to ? to + port_offset : port_min;
 175         for (p = port_min; p <= port_max; p++) {
 176             inet_setport(e, p);
 177             if (bind(slisten, e->ai_addr, e->ai_addrlen) == 0) {
 178                 goto listen;
 179             }
 180             if (p == port_max) {
 181                 fprintf(stderr,"%s: bind(%s,%s,%d): %s\n", __FUNCTION__,
 182                         inet_strfamily(e->ai_family), uaddr, inet_getport(e),
 183                         strerror(errno));
 184                 if (!e->ai_next) {
 185                     error_set(errp, QERR_SOCKET_BIND_FAILED);
 186                 }
 187             }
 188         }
 189         closesocket(slisten);
 190     }
 191     fprintf(stderr, "%s: FAILED\n", __FUNCTION__);
 192     freeaddrinfo(res);
 193     return -1;
 194
 195 listen:
 196     if (listen(slisten,1) != 0) {
 197         error_set(errp, QERR_SOCKET_LISTEN_FAILED);
 198         perror("listen");
 199         closesocket(slisten);
 200         freeaddrinfo(res);
 201         return -1;
 202     }
 203     snprintf(uport, sizeof(uport), "%d", inet_getport(e) - port_offset);
 204     qemu_opt_set(opts, "host", uaddr);
 205     qemu_opt_set(opts, "port", uport);
 206     qemu_opt_set(opts, "ipv6", (e->ai_family == PF_INET6) ? "on" : "off");
 207     qemu_opt_set(opts, "ipv4", (e->ai_family != PF_INET6) ? "on" : "off");
 208     freeaddrinfo(res);
 209     return slisten;
 210 }
 211
 212 int inet_connect_opts(QemuOpts *opts, Error **errp)
 213 {
 214     struct addrinfo ai,*res,*e;
 215     const char *addr;
 216     const char *port;
 217     char uaddr[INET6_ADDRSTRLEN+1];
 218     char uport[33];
 219     int sock,rc;
 220     bool block;
 221
 222     memset(&ai,0, sizeof(ai));
 223     ai.ai_flags = AI_CANONNAME | AI_ADDRCONFIG;
 224     ai.ai_family = PF_UNSPEC;
 225     ai.ai_socktype = SOCK_STREAM;
 226
 227     addr = qemu_opt_get(opts, "host");
 228     port = qemu_opt_get(opts, "port");
 229     block = qemu_opt_get_bool(opts, "block", 0);
 230     if (addr == NULL || port == NULL) {
 231         fprintf(stderr, "inet_connect: host and/or port not specified\n");
 232         error_set(errp, QERR_SOCKET_CREATE_FAILED);
 233         return -1;
 234     }
 235
 236     if (qemu_opt_get_bool(opts, "ipv4", 0))
 237         ai.ai_family = PF_INET;
 238     if (qemu_opt_get_bool(opts, "ipv6", 0))
 239         ai.ai_family = PF_INET6;
 240
 241     /* lookup */
 242     if (0 != (rc = getaddrinfo(addr, port, &ai, &res))) {
 243         fprintf(stderr,"getaddrinfo(%s,%s): %s\n", addr, port,
 244                 gai_strerror(rc));
 245         error_set(errp, QERR_SOCKET_CREATE_FAILED);
 246         return -1;
 247     }
 248
 249     for (e = res; e != NULL; e = e->ai_next) {
 250         if (getnameinfo((struct sockaddr*)e->ai_addr,e->ai_addrlen,
 251                             uaddr,INET6_ADDRSTRLEN,uport,32,
 252                             NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
 253             fprintf(stderr,"%s: getnameinfo: oops\n", __FUNCTION__);
 254             continue;
 255         }
 256         sock = qemu_socket(e->ai_family, e->ai_socktype, e->ai_protocol);
 257         if (sock < 0) {
 258             fprintf(stderr,"%s: socket(%s): %s\n", __FUNCTION__,
 259             inet_strfamily(e->ai_family), strerror(errno));
 260             continue;
 261         }
 262         setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,(void*)&on,sizeof(on));
 263         if (!block) {
 264             socket_set_nonblock(sock);
 265         }
 266         /* connect to peer */
 267         do {
 268             rc = 0;
 269             if (connect(sock, e->ai_addr, e->ai_addrlen) < 0) {
 270                 rc = -socket_error();
 271             }
 272         } while (rc == -EINTR);
 273
 274   #ifdef _WIN32
 275         if (!block && (rc == -EINPROGRESS || rc == -EWOULDBLOCK
 276                        || rc == -WSAEALREADY)) {
 277   #else
 278         if (!block && (rc == -EINPROGRESS)) {
 279   #endif
 280             error_set(errp, QERR_SOCKET_CONNECT_IN_PROGRESS);
 281         } else if (rc < 0) {
 282             if (NULL == e->ai_next)
 283                 fprintf(stderr, "%s: connect(%s,%s,%s,%s): %s\n", __FUNCTION__,
 284                         inet_strfamily(e->ai_family),
 285                         e->ai_canonname, uaddr, uport, strerror(errno));
 286             closesocket(sock);
 287             sock = -1;
 288             continue;
 289         }
 290         freeaddrinfo(res);
 291         return sock;
 292     }
 293     error_set(errp, QERR_SOCKET_CONNECT_FAILED);
 294     freeaddrinfo(res);
 295     return -1;
 296 }
 297
 298 int inet_dgram_opts(QemuOpts *opts)
 299 {
 300     struct addrinfo ai, *peer = NULL, *local = NULL;
 301     const char *addr;
 302     const char *port;
 303     char uaddr[INET6_ADDRSTRLEN+1];
 304     char uport[33];
 305     int sock = -1, rc;
 306
 307     /* lookup peer addr */
 308     memset(&ai,0, sizeof(ai));
 309     ai.ai_flags = AI_CANONNAME | AI_ADDRCONFIG;
 310     ai.ai_family = PF_UNSPEC;
 311     ai.ai_socktype = SOCK_DGRAM;
 312
 313     addr = qemu_opt_get(opts, "host");
 314     port = qemu_opt_get(opts, "port");
 315     if (addr == NULL || strlen(addr) == 0) {
 316         addr = "localhost";
 317     }
 318     if (port == NULL || strlen(port) == 0) {
 319         fprintf(stderr, "inet_dgram: port not specified\n");
 320         return -1;
 321     }
 322
 323     if (qemu_opt_get_bool(opts, "ipv4", 0))
 324         ai.ai_family = PF_INET;
 325     if (qemu_opt_get_bool(opts, "ipv6", 0))
 326         ai.ai_family = PF_INET6;
 327
 328     if (0 != (rc = getaddrinfo(addr, port, &ai, &peer))) {
 329         fprintf(stderr,"getaddrinfo(%s,%s): %s\n", addr, port,
 330                 gai_strerror(rc));
 331         return -1;
 332     }
 333
 334     /* lookup local addr */
 335     memset(&ai,0, sizeof(ai));
 336     ai.ai_flags = AI_PASSIVE;
 337     ai.ai_family = peer->ai_family;
 338     ai.ai_socktype = SOCK_DGRAM;
 339
 340     addr = qemu_opt_get(opts, "localaddr");
 341     port = qemu_opt_get(opts, "localport");
 342     if (addr == NULL || strlen(addr) == 0) {
 343         addr = NULL;
 344     }
 345     if (!port || strlen(port) == 0)
 346         port = "0";
 347
 348     if (0 != (rc = getaddrinfo(addr, port, &ai, &local))) {
 349         fprintf(stderr,"getaddrinfo(%s,%s): %s\n", addr, port,
 350                 gai_strerror(rc));
 351         return -1;
 352     }
 353
 354     /* create socket */
 355     sock = qemu_socket(peer->ai_family, peer->ai_socktype, peer->ai_protocol);
 356     if (sock < 0) {
 357         fprintf(stderr,"%s: socket(%s): %s\n", __FUNCTION__,
 358                 inet_strfamily(peer->ai_family), strerror(errno));
 359         goto err;
 360     }
 361     setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,(void*)&on,sizeof(on));
 362
 363     /* bind socket */
 364     if (getnameinfo((struct sockaddr*)local->ai_addr,local->ai_addrlen,
 365                     uaddr,INET6_ADDRSTRLEN,uport,32,
 366                     NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
 367         fprintf(stderr, "%s: getnameinfo: oops\n", __FUNCTION__);
 368         goto err;
 369     }
 370     if (bind(sock, local->ai_addr, local->ai_addrlen) < 0) {
 371         fprintf(stderr,"%s: bind(%s,%s,%d): OK\n", __FUNCTION__,
 372                 inet_strfamily(local->ai_family), uaddr, inet_getport(local));
 373         goto err;
 374     }
 375
 376     /* connect to peer */
 377     if (getnameinfo((struct sockaddr*)peer->ai_addr, peer->ai_addrlen,
 378                     uaddr, INET6_ADDRSTRLEN, uport, 32,
 379                     NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
 380         fprintf(stderr, "%s: getnameinfo: oops\n", __FUNCTION__);
 381         goto err;
 382     }
 383     if (connect(sock,peer->ai_addr,peer->ai_addrlen) < 0) {
 384         fprintf(stderr, "%s: connect(%s,%s,%s,%s): %s\n", __FUNCTION__,
 385                 inet_strfamily(peer->ai_family),
 386                 peer->ai_canonname, uaddr, uport, strerror(errno));
 387         goto err;
 388     }
 389
 390     freeaddrinfo(local);
 391     freeaddrinfo(peer);
 392     return sock;
 393
 394 err:
 395     if (-1 != sock)
 396         closesocket(sock);
 397     if (local)
 398         freeaddrinfo(local);
 399     if (peer)
 400         freeaddrinfo(peer);
 401     return -1;
 402 }
 403
 404 /* compatibility wrapper */
 405 static int inet_parse(QemuOpts *opts, const char *str)
 406 {
 407     const char *optstr, *h;
 408     char addr[64];
 409     char port[33];
 410     int pos;
 411
 412     /* parse address */
 413     if (str[0] == ':') {
 414         /* no host given */
 415         addr[0] = '\0';
 416         if (1 != sscanf(str,":%32[^,]%n",port,&pos)) {
 417             fprintf(stderr, "%s: portonly parse error (%s)\n",
 418                     __FUNCTION__, str);
 419             return -1;
 420         }
 421     } else if (str[0] == '[') {
 422         /* IPv6 addr */
 423         if (2 != sscanf(str,"[%64[^]]]:%32[^,]%n",addr,port,&pos)) {
 424             fprintf(stderr, "%s: ipv6 parse error (%s)\n",
 425                     __FUNCTION__, str);
 426             return -1;
 427         }
 428         qemu_opt_set(opts, "ipv6", "on");
 429     } else if (qemu_isdigit(str[0])) {
 430         /* IPv4 addr */
 431         if (2 != sscanf(str,"%64[0-9.]:%32[^,]%n",addr,port,&pos)) {
 432             fprintf(stderr, "%s: ipv4 parse error (%s)\n",
 433                     __FUNCTION__, str);
 434             return -1;
 435         }
 436         qemu_opt_set(opts, "ipv4", "on");
 437     } else {
 438         /* hostname */
 439         if (2 != sscanf(str,"%64[^:]:%32[^,]%n",addr,port,&pos)) {
 440             fprintf(stderr, "%s: hostname parse error (%s)\n",
 441                     __FUNCTION__, str);
 442             return -1;
 443         }
 444     }
 445     qemu_opt_set(opts, "host", addr);
 446     qemu_opt_set(opts, "port", port);
 447
 448     /* parse options */
 449     optstr = str + pos;
 450     h = strstr(optstr, ",to=");
 451     if (h)
 452         qemu_opt_set(opts, "to", h+4);
 453     if (strstr(optstr, ",ipv4"))
 454         qemu_opt_set(opts, "ipv4", "on");
 455     if (strstr(optstr, ",ipv6"))
 456         qemu_opt_set(opts, "ipv6", "on");
 457     return 0;
 458 }
 459
 460 int inet_listen(const char *str, char *ostr, int olen,
 461                 int socktype, int port_offset, Error **errp)
 462 {
 463     QemuOpts *opts;
 464     char *optstr;
 465     int sock = -1;
 466
 467     opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL);
 468     if (inet_parse(opts, str) == 0) {
 469         sock = inet_listen_opts(opts, port_offset, errp);
 470         if (sock != -1 && ostr) {
 471             optstr = strchr(str, ',');
 472             if (qemu_opt_get_bool(opts, "ipv6", 0)) {
 473                 snprintf(ostr, olen, "[%s]:%s%s",
 474                          qemu_opt_get(opts, "host"),
 475                          qemu_opt_get(opts, "port"),
 476                          optstr ? optstr : "");
 477             } else {
 478                 snprintf(ostr, olen, "%s:%s%s",
 479                          qemu_opt_get(opts, "host"),
 480                          qemu_opt_get(opts, "port"),
 481                          optstr ? optstr : "");
 482             }
 483         }
 484     } else {
 485         error_set(errp, QERR_SOCKET_CREATE_FAILED);
 486     }
 487     qemu_opts_del(opts);
 488     return sock;
 489 }
 490
 491 int inet_connect(const char *str, bool block, Error **errp)
 492 {
 493     QemuOpts *opts;
 494     int sock = -1;
 495
 496     opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL);
 497     if (inet_parse(opts, str) == 0) {
 498         if (block) {
 499             qemu_opt_set(opts, "block", "on");
 500         }
 501         sock = inet_connect_opts(opts, errp);
 502     } else {
 503         error_set(errp, QERR_SOCKET_CREATE_FAILED);
 504     }
 505     qemu_opts_del(opts);
 506     return sock;
 507 }
 508
 509 #ifndef _WIN32
 510
 511 int unix_listen_opts(QemuOpts *opts)
 512 {
 513     struct sockaddr_un un;
 514     const char *path = qemu_opt_get(opts, "path");
 515     int sock, fd;
 516
 517     sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
 518     if (sock < 0) {
 519         perror("socket(unix)");
 520         return -1;
 521     }
 522
 523     memset(&un, 0, sizeof(un));
 524     un.sun_family = AF_UNIX;
 525     if (path && strlen(path)) {
 526         snprintf(un.sun_path, sizeof(un.sun_path), "%s", path);
 527     } else {
 528         char *tmpdir = getenv("TMPDIR");
 529         snprintf(un.sun_path, sizeof(un.sun_path), "%s/qemu-socket-XXXXXX",
 530                  tmpdir ? tmpdir : "/tmp");
 531         /*
 532          * This dummy fd usage silences the mktemp() unsecure warning.
 533          * Using mkstemp() doesn't make things more secure here
 534          * though.  bind() complains about existing files, so we have
 535          * to unlink first and thus re-open the race window.  The
 536          * worst case possible is bind() failing, i.e. a DoS attack.
 537          */
 538         fd = mkstemp(un.sun_path); close(fd);
 539         qemu_opt_set(opts, "path", un.sun_path);
 540     }
 541
 542     unlink(un.sun_path);
 543     if (bind(sock, (struct sockaddr*) &un, sizeof(un)) < 0) {
 544         fprintf(stderr, "bind(unix:%s): %s\n", un.sun_path, strerror(errno));
 545         goto err;
 546     }
 547     if (listen(sock, 1) < 0) {
 548         fprintf(stderr, "listen(unix:%s): %s\n", un.sun_path, strerror(errno));
 549         goto err;
 550     }
 551
 552     return sock;
 553
 554 err:
 555     closesocket(sock);
 556     return -1;
 557 }
 558
 559 int unix_connect_opts(QemuOpts *opts)
 560 {
 561     struct sockaddr_un un;
 562     const char *path = qemu_opt_get(opts, "path");
 563     int sock;
 564
 565     if (NULL == path) {
 566         fprintf(stderr, "unix connect: no path specified\n");
 567         return -1;
 568     }
 569
 570     sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
 571     if (sock < 0) {
 572         perror("socket(unix)");
 573         return -1;
 574     }
 575
 576     memset(&un, 0, sizeof(un));
 577     un.sun_family = AF_UNIX;
 578     snprintf(un.sun_path, sizeof(un.sun_path), "%s", path);
 579     if (connect(sock, (struct sockaddr*) &un, sizeof(un)) < 0) {
 580         fprintf(stderr, "connect(unix:%s): %s\n", path, strerror(errno));
 581         close(sock);
 582         return -1;
 583     }
 584
 585     return sock;
 586 }
 587
 588 /* compatibility wrapper */
 589 int unix_listen(const char *str, char *ostr, int olen)
 590 {
 591     QemuOpts *opts;
 592     char *path, *optstr;
 593     int sock, len;
 594
 595     opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL);
 596
 597     optstr = strchr(str, ',');
 598     if (optstr) {
 599         len = optstr - str;
 600         if (len) {
 601             path = g_malloc(len+1);
 602             snprintf(path, len+1, "%.*s", len, str);
 603             qemu_opt_set(opts, "path", path);
 604             g_free(path);
 605         }
 606     } else {
 607         qemu_opt_set(opts, "path", str);
 608     }
 609
 610     sock = unix_listen_opts(opts);
 611
 612     if (sock != -1 && ostr)
 613         snprintf(ostr, olen, "%s%s", qemu_opt_get(opts, "path"), optstr ? optstr : "");
 614     qemu_opts_del(opts);
 615     return sock;
 616 }
 617
 618 int unix_connect(const char *path)
 619 {
 620     QemuOpts *opts;
 621     int sock;
 622
 623     opts = qemu_opts_create(&dummy_opts, NULL, 0, NULL);
 624     qemu_opt_set(opts, "path", path);
 625     sock = unix_connect_opts(opts);
 626     qemu_opts_del(opts);
 627     return sock;
 628 }
 629
 630 #else
 631
 632 int unix_listen_opts(QemuOpts *opts)
 633 {
 634     fprintf(stderr, "unix sockets are not available on windows\n");
 635     errno = ENOTSUP;
 636     return -1;
 637 }
 638
 639 int unix_connect_opts(QemuOpts *opts)
 640 {
 641     fprintf(stderr, "unix sockets are not available on windows\n");
 642     errno = ENOTSUP;
 643     return -1;
 644 }
 645
 646 int unix_listen(const char *path, char *ostr, int olen)
 647 {
 648     fprintf(stderr, "unix sockets are not available on windows\n");
 649     errno = ENOTSUP;
 650     return -1;
 651 }
 652
 653 int unix_connect(const char *path)
 654 {
 655     fprintf(stderr, "unix sockets are not available on windows\n");
 656     errno = ENOTSUP;
 657     return -1;
 658 }
 659
 660 #endif
 661
 662 #ifdef _WIN32
 663 static void socket_cleanup(void)
 664 {
 665     WSACleanup();
 666 }
 667 #endif
 668
 669 int socket_init(void)
 670 {
 671 #ifdef _WIN32
 672     WSADATA Data;
 673     int ret, err;
 674
 675     ret = WSAStartup(MAKEWORD(2,2), &Data);
 676     if (ret != 0) {
 677         err = WSAGetLastError();
 678         fprintf(stderr, "WSAStartup: %d\n", err);
 679         return -1;
 680     }
 681     atexit(socket_cleanup);
 682 #endif
 683     return 0;
 684 }