release/src/router/libxml2/nanoftp.c

   1 /*
   2  * nanoftp.c: basic FTP client support
   3  *
   4  *  Reference: RFC 959
   5  */
   6
   7 #ifdef TESTING
   8 #define STANDALONE
   9 #define HAVE_STDLIB_H
  10 #define HAVE_UNISTD_H
  11 #define HAVE_SYS_SOCKET_H
  12 #define HAVE_NETINET_IN_H
  13 #define HAVE_NETDB_H
  14 #define HAVE_SYS_TIME_H
  15 #else /* TESTING */
  16 #define NEED_SOCKETS
  17 #endif /* TESTING */
  18
  19 #define IN_LIBXML
  20 #include "libxml.h"
  21
  22 #ifdef LIBXML_FTP_ENABLED
  23 #include <string.h>
  24
  25 #ifdef HAVE_STDLIB_H
  26 #include <stdlib.h>
  27 #endif
  28 #ifdef HAVE_UNISTD_H
  29 #include <unistd.h>
  30 #endif
  31 #ifdef HAVE_SYS_SOCKET_H
  32 #include <sys/socket.h>
  33 #endif
  34 #ifdef HAVE_NETINET_IN_H
  35 #include <netinet/in.h>
  36 #endif
  37 #ifdef HAVE_ARPA_INET_H
  38 #include <arpa/inet.h>
  39 #endif
  40 #ifdef HAVE_NETDB_H
  41 #include <netdb.h>
  42 #endif
  43 #ifdef HAVE_FCNTL_H
  44 #include <fcntl.h>
  45 #endif
  46 #ifdef HAVE_ERRNO_H
  47 #include <errno.h>
  48 #endif
  49 #ifdef HAVE_SYS_TIME_H
  50 #include <sys/time.h>
  51 #endif
  52 #ifdef HAVE_SYS_SELECT_H
  53 #include <sys/select.h>
  54 #endif
  55 #ifdef HAVE_SYS_SOCKET_H
  56 #include <sys/socket.h>
  57 #endif
  58 #ifdef HAVE_SYS_TYPES_H
  59 #include <sys/types.h>
  60 #endif
  61 #ifdef HAVE_STRINGS_H
  62 #include <strings.h>
  63 #endif
  64
  65 #include <libxml/xmlmemory.h>
  66 #include <libxml/parser.h>
  67 #include <libxml/xmlerror.h>
  68 #include <libxml/uri.h>
  69 #include <libxml/nanoftp.h>
  70 #include <libxml/globals.h>
  71
  72 /* #define DEBUG_FTP 1  */
  73 #ifdef STANDALONE
  74 #ifndef DEBUG_FTP
  75 #define DEBUG_FTP 1
  76 #endif
  77 #endif
  78
  79
  80 #if defined(__MINGW32__) || defined(_WIN32_WCE)
  81 #ifndef _WINSOCKAPI_
  82 #define _WINSOCKAPI_
  83 #endif
  84 #include <wsockcompat.h>
  85 #include <winsock2.h>
  86 #undef XML_SOCKLEN_T
  87 #define XML_SOCKLEN_T unsigned int
  88 #endif
  89
  90 /**
  91  * A couple portability macros
  92  */
  93 #ifndef _WINSOCKAPI_
  94 #if !defined(__BEOS__) || defined(__HAIKU__)
  95 #define closesocket(s) close(s)
  96 #endif
  97 #endif
  98
  99 #ifdef __BEOS__
 100 #ifndef PF_INET
 101 #define PF_INET AF_INET
 102 #endif
 103 #endif
 104
 105 #ifdef _AIX
 106 #ifdef HAVE_BROKEN_SS_FAMILY
 107 #define ss_family __ss_family
 108 #endif
 109 #endif
 110
 111 #ifndef XML_SOCKLEN_T
 112 #define XML_SOCKLEN_T unsigned int
 113 #endif
 114
 115 #define FTP_COMMAND_OK          200
 116 #define FTP_SYNTAX_ERROR        500
 117 #define FTP_GET_PASSWD          331
 118 #define FTP_BUF_SIZE            1024
 119
 120 #define XML_NANO_MAX_URLBUF     4096
 121
 122 typedef struct xmlNanoFTPCtxt {
 123     char *protocol;     /* the protocol name */
 124     char *hostname;     /* the host name */
 125     int port;           /* the port */
 126     char *path;         /* the path within the URL */
 127     char *user;         /* user string */
 128     char *passwd;       /* passwd string */
 129 #ifdef SUPPORT_IP6
 130     struct sockaddr_storage ftpAddr; /* this is large enough to hold IPv6 address*/
 131 #else
 132     struct sockaddr_in ftpAddr; /* the socket address struct */
 133 #endif
 134     int passive;        /* currently we support only passive !!! */
 135     SOCKET controlFd;   /* the file descriptor for the control socket */
 136     SOCKET dataFd;      /* the file descriptor for the data socket */
 137     int state;          /* WRITE / READ / CLOSED */
 138     int returnValue;    /* the protocol return value */
 139     /* buffer for data received from the control connection */
 140     char controlBuf[FTP_BUF_SIZE + 1];
 141     int controlBufIndex;
 142     int controlBufUsed;
 143     int controlBufAnswer;
 144 } xmlNanoFTPCtxt, *xmlNanoFTPCtxtPtr;
 145
 146 static int initialized = 0;
 147 static char *proxy = NULL;      /* the proxy name if any */
 148 static int proxyPort = 0;       /* the proxy port if any */
 149 static char *proxyUser = NULL;  /* user for proxy authentication */
 150 static char *proxyPasswd = NULL;/* passwd for proxy authentication */
 151 static int proxyType = 0;       /* uses TYPE or a@b ? */
 152
 153 #ifdef SUPPORT_IP6
 154 static
 155 int have_ipv6(void) {
 156     int s;
 157
 158     s = socket (AF_INET6, SOCK_STREAM, 0);
 159     if (s != -1) {
 160         close (s);
 161         return (1);
 162     }
 163     return (0);
 164 }
 165 #endif
 166
 167 /**
 168  * xmlFTPErrMemory:
 169  * @extra:  extra informations
 170  *
 171  * Handle an out of memory condition
 172  */
 173 static void
 174 xmlFTPErrMemory(const char *extra)
 175 {
 176     __xmlSimpleError(XML_FROM_FTP, XML_ERR_NO_MEMORY, NULL, NULL, extra);
 177 }
 178
 179 /**
 180  * xmlNanoFTPInit:
 181  *
 182  * Initialize the FTP protocol layer.
 183  * Currently it just checks for proxy informations,
 184  * and get the hostname
 185  */
 186
 187 void
 188 xmlNanoFTPInit(void) {
 189     const char *env;
 190 #ifdef _WINSOCKAPI_
 191     WSADATA wsaData;
 192 #endif
 193
 194     if (initialized)
 195         return;
 196
 197 #ifdef _WINSOCKAPI_
 198     if (WSAStartup(MAKEWORD(1, 1), &wsaData) != 0)
 199         return;
 200 #endif
 201
 202     proxyPort = 21;
 203     env = getenv("no_proxy");
 204     if (env && ((env[0] == '*' ) && (env[1] == 0)))
 205         return;
 206     env = getenv("ftp_proxy");
 207     if (env != NULL) {
 208         xmlNanoFTPScanProxy(env);
 209     } else {
 210         env = getenv("FTP_PROXY");
 211         if (env != NULL) {
 212             xmlNanoFTPScanProxy(env);
 213         }
 214     }
 215     env = getenv("ftp_proxy_user");
 216     if (env != NULL) {
 217         proxyUser = xmlMemStrdup(env);
 218     }
 219     env = getenv("ftp_proxy_password");
 220     if (env != NULL) {
 221         proxyPasswd = xmlMemStrdup(env);
 222     }
 223     initialized = 1;
 224 }
 225
 226 /**
 227  * xmlNanoFTPCleanup:
 228  *
 229  * Cleanup the FTP protocol layer. This cleanup proxy informations.
 230  */
 231
 232 void
 233 xmlNanoFTPCleanup(void) {
 234     if (proxy != NULL) {
 235         xmlFree(proxy);
 236         proxy = NULL;
 237     }
 238     if (proxyUser != NULL) {
 239         xmlFree(proxyUser);
 240         proxyUser = NULL;
 241     }
 242     if (proxyPasswd != NULL) {
 243         xmlFree(proxyPasswd);
 244         proxyPasswd = NULL;
 245     }
 246 #ifdef _WINSOCKAPI_
 247     if (initialized)
 248         WSACleanup();
 249 #endif
 250     initialized = 0;
 251 }
 252
 253 /**
 254  * xmlNanoFTPProxy:
 255  * @host:  the proxy host name
 256  * @port:  the proxy port
 257  * @user:  the proxy user name
 258  * @passwd:  the proxy password
 259  * @type:  the type of proxy 1 for using SITE, 2 for USER a@b
 260  *
 261  * Setup the FTP proxy informations.
 262  * This can also be done by using ftp_proxy ftp_proxy_user and
 263  * ftp_proxy_password environment variables.
 264  */
 265
 266 void
 267 xmlNanoFTPProxy(const char *host, int port, const char *user,
 268                 const char *passwd, int type) {
 269     if (proxy != NULL) {
 270         xmlFree(proxy);
 271         proxy = NULL;
 272     }
 273     if (proxyUser != NULL) {
 274         xmlFree(proxyUser);
 275         proxyUser = NULL;
 276     }
 277     if (proxyPasswd != NULL) {
 278         xmlFree(proxyPasswd);
 279         proxyPasswd = NULL;
 280     }
 281     if (host)
 282         proxy = xmlMemStrdup(host);
 283     if (user)
 284         proxyUser = xmlMemStrdup(user);
 285     if (passwd)
 286         proxyPasswd = xmlMemStrdup(passwd);
 287     proxyPort = port;
 288     proxyType = type;
 289 }
 290
 291 /**
 292  * xmlNanoFTPScanURL:
 293  * @ctx:  an FTP context
 294  * @URL:  The URL used to initialize the context
 295  *
 296  * (Re)Initialize an FTP context by parsing the URL and finding
 297  * the protocol host port and path it indicates.
 298  */
 299
 300 static void
 301 xmlNanoFTPScanURL(void *ctx, const char *URL) {
 302     xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
 303     xmlURIPtr uri;
 304
 305     /*
 306      * Clear any existing data from the context
 307      */
 308     if (ctxt->protocol != NULL) {
 309         xmlFree(ctxt->protocol);
 310         ctxt->protocol = NULL;
 311     }
 312     if (ctxt->hostname != NULL) {
 313         xmlFree(ctxt->hostname);
 314         ctxt->hostname = NULL;
 315     }
 316     if (ctxt->path != NULL) {
 317         xmlFree(ctxt->path);
 318         ctxt->path = NULL;
 319     }
 320     if (URL == NULL) return;
 321
 322     uri = xmlParseURIRaw(URL, 1);
 323     if (uri == NULL)
 324         return;
 325
 326     if ((uri->scheme == NULL) || (uri->server == NULL)) {
 327         xmlFreeURI(uri);
 328         return;
 329     }
 330
 331     ctxt->protocol = xmlMemStrdup(uri->scheme);
 332     ctxt->hostname = xmlMemStrdup(uri->server);
 333     if (uri->path != NULL)
 334         ctxt->path = xmlMemStrdup(uri->path);
 335     else
 336         ctxt->path = xmlMemStrdup("/");
 337     if (uri->port != 0)
 338         ctxt->port = uri->port;
 339
 340     if (uri->user != NULL) {
 341         char *cptr;
 342         if ((cptr=strchr(uri->user, ':')) == NULL)
 343             ctxt->user = xmlMemStrdup(uri->user);
 344         else {
 345             ctxt->user = (char *)xmlStrndup((xmlChar *)uri->user,
 346                             (cptr - uri->user));
 347             ctxt->passwd = xmlMemStrdup(cptr+1);
 348         }
 349     }
 350
 351     xmlFreeURI(uri);
 352
 353 }
 354
 355 /**
 356  * xmlNanoFTPUpdateURL:
 357  * @ctx:  an FTP context
 358  * @URL:  The URL used to update the context
 359  *
 360  * Update an FTP context by parsing the URL and finding
 361  * new path it indicates. If there is an error in the
 362  * protocol, hostname, port or other information, the
 363  * error is raised. It indicates a new connection has to
 364  * be established.
 365  *
 366  * Returns 0 if Ok, -1 in case of error (other host).
 367  */
 368
 369 int
 370 xmlNanoFTPUpdateURL(void *ctx, const char *URL) {
 371     xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
 372     xmlURIPtr uri;
 373
 374     if (URL == NULL)
 375         return(-1);
 376     if (ctxt == NULL)
 377         return(-1);
 378     if (ctxt->protocol == NULL)
 379         return(-1);
 380     if (ctxt->hostname == NULL)
 381         return(-1);
 382
 383     uri = xmlParseURIRaw(URL, 1);
 384     if (uri == NULL)
 385         return(-1);
 386
 387     if ((uri->scheme == NULL) || (uri->server == NULL)) {
 388         xmlFreeURI(uri);
 389         return(-1);
 390     }
 391     if ((strcmp(ctxt->protocol, uri->scheme)) ||
 392         (strcmp(ctxt->hostname, uri->server)) ||
 393         ((uri->port != 0) && (ctxt->port != uri->port))) {
 394         xmlFreeURI(uri);
 395         return(-1);
 396     }
 397
 398     if (uri->port != 0)
 399         ctxt->port = uri->port;
 400
 401     if (ctxt->path != NULL) {
 402         xmlFree(ctxt->path);
 403         ctxt->path = NULL;
 404     }
 405
 406     if (uri->path == NULL)
 407         ctxt->path = xmlMemStrdup("/");
 408     else
 409         ctxt->path = xmlMemStrdup(uri->path);
 410
 411     xmlFreeURI(uri);
 412
 413     return(0);
 414 }
 415
 416 /**
 417  * xmlNanoFTPScanProxy:
 418  * @URL:  The proxy URL used to initialize the proxy context
 419  *
 420  * (Re)Initialize the FTP Proxy context by parsing the URL and finding
 421  * the protocol host port it indicates.
 422  * Should be like ftp://myproxy/ or ftp://myproxy:3128/
 423  * A NULL URL cleans up proxy informations.
 424  */
 425
 426 void
 427 xmlNanoFTPScanProxy(const char *URL) {
 428     xmlURIPtr uri;
 429
 430     if (proxy != NULL) {
 431         xmlFree(proxy);
 432         proxy = NULL;
 433     }
 434     proxyPort = 0;
 435
 436 #ifdef DEBUG_FTP
 437     if (URL == NULL)
 438         xmlGenericError(xmlGenericErrorContext,
 439                 "Removing FTP proxy info\n");
 440     else
 441         xmlGenericError(xmlGenericErrorContext,
 442                 "Using FTP proxy %s\n", URL);
 443 #endif
 444     if (URL == NULL) return;
 445
 446     uri = xmlParseURIRaw(URL, 1);
 447     if ((uri == NULL) || (uri->scheme == NULL) ||
 448         (strcmp(uri->scheme, "ftp")) || (uri->server == NULL)) {
 449         __xmlIOErr(XML_FROM_FTP, XML_FTP_URL_SYNTAX, "Syntax Error\n");
 450         if (uri != NULL)
 451             xmlFreeURI(uri);
 452         return;
 453     }
 454
 455     proxy = xmlMemStrdup(uri->server);
 456     if (uri->port != 0)
 457         proxyPort = uri->port;
 458
 459     xmlFreeURI(uri);
 460 }
 461
 462 /**
 463  * xmlNanoFTPNewCtxt:
 464  * @URL:  The URL used to initialize the context
 465  *
 466  * Allocate and initialize a new FTP context.
 467  *
 468  * Returns an FTP context or NULL in case of error.
 469  */
 470
 471 void*
 472 xmlNanoFTPNewCtxt(const char *URL) {
 473     xmlNanoFTPCtxtPtr ret;
 474     char *unescaped;
 475
 476     ret = (xmlNanoFTPCtxtPtr) xmlMalloc(sizeof(xmlNanoFTPCtxt));
 477     if (ret == NULL) {
 478         xmlFTPErrMemory("allocating FTP context");
 479         return(NULL);
 480     }
 481
 482     memset(ret, 0, sizeof(xmlNanoFTPCtxt));
 483     ret->port = 21;
 484     ret->passive = 1;
 485     ret->returnValue = 0;
 486     ret->controlBufIndex = 0;
 487     ret->controlBufUsed = 0;
 488     ret->controlFd = INVALID_SOCKET;
 489
 490     unescaped = xmlURIUnescapeString(URL, 0, NULL);
 491     if (unescaped != NULL) {
 492         xmlNanoFTPScanURL(ret, unescaped);
 493         xmlFree(unescaped);
 494     } else if (URL != NULL)
 495         xmlNanoFTPScanURL(ret, URL);
 496
 497     return(ret);
 498 }
 499
 500 /**
 501  * xmlNanoFTPFreeCtxt:
 502  * @ctx:  an FTP context
 503  *
 504  * Frees the context after closing the connection.
 505  */
 506
 507 void
 508 xmlNanoFTPFreeCtxt(void * ctx) {
 509     xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
 510     if (ctxt == NULL) return;
 511     if (ctxt->hostname != NULL) xmlFree(ctxt->hostname);
 512     if (ctxt->protocol != NULL) xmlFree(ctxt->protocol);
 513     if (ctxt->path != NULL) xmlFree(ctxt->path);
 514     ctxt->passive = 1;
 515     if (ctxt->controlFd != INVALID_SOCKET) closesocket(ctxt->controlFd);
 516     ctxt->controlFd = INVALID_SOCKET;
 517     ctxt->controlBufIndex = -1;
 518     ctxt->controlBufUsed = -1;
 519     xmlFree(ctxt);
 520 }
 521
 522 /**
 523  * xmlNanoFTPParseResponse:
 524  * @buf:  the buffer containing the response
 525  * @len:  the buffer length
 526  *
 527  * Parsing of the server answer, we just extract the code.
 528  *
 529  * returns 0 for errors
 530  *     +XXX for last line of response
 531  *     -XXX for response to be continued
 532  */
 533 static int
 534 xmlNanoFTPParseResponse(char *buf, int len) {
 535     int val = 0;
 536
 537     if (len < 3) return(-1);
 538     if ((*buf >= '0') && (*buf <= '9'))
 539         val = val * 10 + (*buf - '0');
 540     else
 541         return(0);
 542     buf++;
 543     if ((*buf >= '0') && (*buf <= '9'))
 544         val = val * 10 + (*buf - '0');
 545     else
 546         return(0);
 547     buf++;
 548     if ((*buf >= '0') && (*buf <= '9'))
 549         val = val * 10 + (*buf - '0');
 550     else
 551         return(0);
 552     buf++;
 553     if (*buf == '-')
 554         return(-val);
 555     return(val);
 556 }
 557
 558 /**
 559  * xmlNanoFTPGetMore:
 560  * @ctx:  an FTP context
 561  *
 562  * Read more information from the FTP control connection
 563  * Returns the number of bytes read, < 0 indicates an error
 564  */
 565 static int
 566 xmlNanoFTPGetMore(void *ctx) {
 567     xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
 568     int len;
 569     int size;
 570
 571     if ((ctxt == NULL) || (ctxt->controlFd == INVALID_SOCKET)) return(-1);
 572
 573     if ((ctxt->controlBufIndex < 0) || (ctxt->controlBufIndex > FTP_BUF_SIZE)) {
 574 #ifdef DEBUG_FTP
 575         xmlGenericError(xmlGenericErrorContext,
 576                 "xmlNanoFTPGetMore : controlBufIndex = %d\n",
 577                 ctxt->controlBufIndex);
 578 #endif
 579         return(-1);
 580     }
 581
 582     if ((ctxt->controlBufUsed < 0) || (ctxt->controlBufUsed > FTP_BUF_SIZE)) {
 583 #ifdef DEBUG_FTP
 584         xmlGenericError(xmlGenericErrorContext,
 585                 "xmlNanoFTPGetMore : controlBufUsed = %d\n",
 586                 ctxt->controlBufUsed);
 587 #endif
 588         return(-1);
 589     }
 590     if (ctxt->controlBufIndex > ctxt->controlBufUsed) {
 591 #ifdef DEBUG_FTP
 592         xmlGenericError(xmlGenericErrorContext,
 593                 "xmlNanoFTPGetMore : controlBufIndex > controlBufUsed %d > %d\n",
 594                ctxt->controlBufIndex, ctxt->controlBufUsed);
 595 #endif
 596         return(-1);
 597     }
 598
 599     /*
 600      * First pack the control buffer
 601      */
 602     if (ctxt->controlBufIndex > 0) {
 603         memmove(&ctxt->controlBuf[0], &ctxt->controlBuf[ctxt->controlBufIndex],
 604                 ctxt->controlBufUsed - ctxt->controlBufIndex);
 605         ctxt->controlBufUsed -= ctxt->controlBufIndex;
 606         ctxt->controlBufIndex = 0;
 607     }
 608     size = FTP_BUF_SIZE - ctxt->controlBufUsed;
 609     if (size == 0) {
 610 #ifdef DEBUG_FTP
 611         xmlGenericError(xmlGenericErrorContext,
 612                 "xmlNanoFTPGetMore : buffer full %d \n", ctxt->controlBufUsed);
 613 #endif
 614         return(0);
 615     }
 616
 617     /*
 618      * Read the amount left on the control connection
 619      */
 620     if ((len = recv(ctxt->controlFd, &ctxt->controlBuf[ctxt->controlBufIndex],
 621                     size, 0)) < 0) {
 622         __xmlIOErr(XML_FROM_FTP, 0, "recv failed");
 623         closesocket(ctxt->controlFd); ctxt->controlFd = INVALID_SOCKET;
 624         ctxt->controlFd = INVALID_SOCKET;
 625         return(-1);
 626     }
 627 #ifdef DEBUG_FTP
 628     xmlGenericError(xmlGenericErrorContext,
 629             "xmlNanoFTPGetMore : read %d [%d - %d]\n", len,
 630            ctxt->controlBufUsed, ctxt->controlBufUsed + len);
 631 #endif
 632     ctxt->controlBufUsed += len;
 633     ctxt->controlBuf[ctxt->controlBufUsed] = 0;
 634
 635     return(len);
 636 }
 637
 638 /**
 639  * xmlNanoFTPReadResponse:
 640  * @ctx:  an FTP context
 641  *
 642  * Read the response from the FTP server after a command.
 643  * Returns the code number
 644  */
 645 static int
 646 xmlNanoFTPReadResponse(void *ctx) {
 647     xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
 648     char *ptr, *end;
 649     int len;
 650     int res = -1, cur = -1;
 651
 652     if ((ctxt == NULL) || (ctxt->controlFd == INVALID_SOCKET)) return(-1);
 653
 654 get_more:
 655     /*
 656      * Assumes everything up to controlBuf[controlBufIndex] has been read
 657      * and analyzed.
 658      */
 659     len = xmlNanoFTPGetMore(ctx);
 660     if (len < 0) {
 661         return(-1);
 662     }
 663     if ((ctxt->controlBufUsed == 0) && (len == 0)) {
 664         return(-1);
 665     }
 666     ptr = &ctxt->controlBuf[ctxt->controlBufIndex];
 667     end = &ctxt->controlBuf[ctxt->controlBufUsed];
 668
 669 #ifdef DEBUG_FTP
 670     xmlGenericError(xmlGenericErrorContext,
 671             "\n<<<\n%s\n--\n", ptr);
 672 #endif
 673     while (ptr < end) {
 674         cur = xmlNanoFTPParseResponse(ptr, end - ptr);
 675         if (cur > 0) {
 676             /*
 677              * Successfully scanned the control code, scratch
 678              * till the end of the line, but keep the index to be
 679              * able to analyze the result if needed.
 680              */
 681             res = cur;
 682             ptr += 3;
 683             ctxt->controlBufAnswer = ptr - ctxt->controlBuf;
 684             while ((ptr < end) && (*ptr != '\n')) ptr++;
 685             if (*ptr == '\n') ptr++;
 686             if (*ptr == '\r') ptr++;
 687             break;
 688         }
 689         while ((ptr < end) && (*ptr != '\n')) ptr++;
 690         if (ptr >= end) {
 691             ctxt->controlBufIndex = ctxt->controlBufUsed;
 692             goto get_more;
 693         }
 694         if (*ptr != '\r') ptr++;
 695     }
 696
 697     if (res < 0) goto get_more;
 698     ctxt->controlBufIndex = ptr - ctxt->controlBuf;
 699 #ifdef DEBUG_FTP
 700     ptr = &ctxt->controlBuf[ctxt->controlBufIndex];
 701     xmlGenericError(xmlGenericErrorContext, "\n---\n%s\n--\n", ptr);
 702 #endif
 703
 704 #ifdef DEBUG_FTP
 705     xmlGenericError(xmlGenericErrorContext, "Got %d\n", res);
 706 #endif
 707     return(res / 100);
 708 }
 709
 710 /**
 711  * xmlNanoFTPGetResponse:
 712  * @ctx:  an FTP context
 713  *
 714  * Get the response from the FTP server after a command.
 715  * Returns the code number
 716  */
 717
 718 int
 719 xmlNanoFTPGetResponse(void *ctx) {
 720     int res;
 721
 722     res = xmlNanoFTPReadResponse(ctx);
 723
 724     return(res);
 725 }
 726
 727 /**
 728  * xmlNanoFTPCheckResponse:
 729  * @ctx:  an FTP context
 730  *
 731  * Check if there is a response from the FTP server after a command.
 732  * Returns the code number, or 0
 733  */
 734
 735 int
 736 xmlNanoFTPCheckResponse(void *ctx) {
 737     xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
 738     fd_set rfd;
 739     struct timeval tv;
 740
 741     if ((ctxt == NULL) || (ctxt->controlFd == INVALID_SOCKET)) return(-1);
 742     tv.tv_sec = 0;
 743     tv.tv_usec = 0;
 744     FD_ZERO(&rfd);
 745     FD_SET(ctxt->controlFd, &rfd);
 746     switch(select(ctxt->controlFd + 1, &rfd, NULL, NULL, &tv)) {
 747         case 0:
 748             return(0);
 749         case -1:
 750             __xmlIOErr(XML_FROM_FTP, 0, "select");
 751             return(-1);
 752
 753     }
 754
 755     return(xmlNanoFTPReadResponse(ctx));
 756 }
 757
 758 /**
 759  * Send the user authentication
 760  */
 761
 762 static int
 763 xmlNanoFTPSendUser(void *ctx) {
 764     xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
 765     char buf[200];
 766     int len;
 767     int res;
 768
 769     if (ctxt->user == NULL)
 770         snprintf(buf, sizeof(buf), "USER anonymous\r\n");
 771     else
 772         snprintf(buf, sizeof(buf), "USER %s\r\n", ctxt->user);
 773     buf[sizeof(buf) - 1] = 0;
 774     len = strlen(buf);
 775 #ifdef DEBUG_FTP
 776     xmlGenericError(xmlGenericErrorContext, "%s", buf);
 777 #endif
 778     res = send(ctxt->controlFd, buf, len, 0);
 779     if (res < 0) {
 780         __xmlIOErr(XML_FROM_FTP, 0, "send failed");
 781         return(res);
 782     }
 783     return(0);
 784 }
 785
 786 /**
 787  * Send the password authentication
 788  */
 789
 790 static int
 791 xmlNanoFTPSendPasswd(void *ctx) {
 792     xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
 793     char buf[200];
 794     int len;
 795     int res;
 796
 797     if (ctxt->passwd == NULL)
 798         snprintf(buf, sizeof(buf), "PASS anonymous@\r\n");
 799     else
 800         snprintf(buf, sizeof(buf), "PASS %s\r\n", ctxt->passwd);
 801     buf[sizeof(buf) - 1] = 0;
 802     len = strlen(buf);
 803 #ifdef DEBUG_FTP
 804     xmlGenericError(xmlGenericErrorContext, "%s", buf);
 805 #endif
 806     res = send(ctxt->controlFd, buf, len, 0);
 807     if (res < 0) {
 808         __xmlIOErr(XML_FROM_FTP, 0, "send failed");
 809         return(res);
 810     }
 811     return(0);
 812 }
 813
 814 /**
 815  * xmlNanoFTPQuit:
 816  * @ctx:  an FTP context
 817  *
 818  * Send a QUIT command to the server
 819  *
 820  * Returns -1 in case of error, 0 otherwise
 821  */
 822
 823
 824 int
 825 xmlNanoFTPQuit(void *ctx) {
 826     xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
 827     char buf[200];
 828     int len, res;
 829
 830     if ((ctxt == NULL) || (ctxt->controlFd == INVALID_SOCKET)) return(-1);
 831
 832     snprintf(buf, sizeof(buf), "QUIT\r\n");
 833     len = strlen(buf);
 834 #ifdef DEBUG_FTP
 835     xmlGenericError(xmlGenericErrorContext, "%s", buf); /* Just to be consistent, even though we know it can't have a % in it */
 836 #endif
 837     res = send(ctxt->controlFd, buf, len, 0);
 838     if (res < 0) {
 839         __xmlIOErr(XML_FROM_FTP, 0, "send failed");
 840         return(res);
 841     }
 842     return(0);
 843 }
 844
 845 /**
 846  * xmlNanoFTPConnect:
 847  * @ctx:  an FTP context
 848  *
 849  * Tries to open a control connection
 850  *
 851  * Returns -1 in case of error, 0 otherwise
 852  */
 853
 854 int
 855 xmlNanoFTPConnect(void *ctx) {
 856     xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
 857     struct hostent *hp;
 858     int port;
 859     int res;
 860     int addrlen = sizeof (struct sockaddr_in);
 861
 862     if (ctxt == NULL)
 863         return(-1);
 864     if (ctxt->hostname == NULL)
 865         return(-1);
 866
 867     /*
 868      * do the blocking DNS query.
 869      */
 870     if (proxy) {
 871         port = proxyPort;
 872     } else {
 873         port = ctxt->port;
 874     }
 875     if (port == 0)
 876         port = 21;
 877
 878     memset (&ctxt->ftpAddr, 0, sizeof(ctxt->ftpAddr));
 879
 880 #ifdef SUPPORT_IP6
 881     if (have_ipv6 ()) {
 882         struct addrinfo hints, *tmp, *result;
 883
 884         result = NULL;
 885         memset (&hints, 0, sizeof(hints));
 886         hints.ai_socktype = SOCK_STREAM;
 887
 888         if (proxy) {
 889             if (getaddrinfo (proxy, NULL, &hints, &result) != 0) {
 890                 __xmlIOErr(XML_FROM_FTP, 0, "getaddrinfo failed");
 891                 return (-1);
 892             }
 893         }
 894         else
 895             if (getaddrinfo (ctxt->hostname, NULL, &hints, &result) != 0) {
 896                 __xmlIOErr(XML_FROM_FTP, 0, "getaddrinfo failed");
 897                 return (-1);
 898             }
 899
 900         for (tmp = result; tmp; tmp = tmp->ai_next)
 901             if (tmp->ai_family == AF_INET || tmp->ai_family == AF_INET6)
 902                 break;
 903
 904         if (!tmp) {
 905             if (result)
 906                 freeaddrinfo (result);
 907             __xmlIOErr(XML_FROM_FTP, 0, "getaddrinfo failed");
 908             return (-1);
 909         }
 910         if (tmp->ai_addrlen > sizeof(ctxt->ftpAddr)) {
 911             __xmlIOErr(XML_FROM_FTP, 0, "gethostbyname address mismatch");
 912             return (-1);
 913         }
 914         if (tmp->ai_family == AF_INET6) {
 915             memcpy (&ctxt->ftpAddr, tmp->ai_addr, tmp->ai_addrlen);
 916             ((struct sockaddr_in6 *) &ctxt->ftpAddr)->sin6_port = htons (port);
 917             ctxt->controlFd = socket (AF_INET6, SOCK_STREAM, 0);
 918         }
 919         else {
 920             memcpy (&ctxt->ftpAddr, tmp->ai_addr, tmp->ai_addrlen);
 921             ((struct sockaddr_in *) &ctxt->ftpAddr)->sin_port = htons (port);
 922             ctxt->controlFd = socket (AF_INET, SOCK_STREAM, 0);
 923         }
 924         addrlen = tmp->ai_addrlen;
 925         freeaddrinfo (result);
 926     }
 927     else
 928 #endif
 929     {
 930         if (proxy)
 931             hp = gethostbyname (proxy);
 932         else
 933             hp = gethostbyname (ctxt->hostname);
 934         if (hp == NULL) {
 935             __xmlIOErr(XML_FROM_FTP, 0, "gethostbyname failed");
 936             return (-1);
 937         }
 938         if ((unsigned int) hp->h_length >
 939             sizeof(((struct sockaddr_in *)&ctxt->ftpAddr)->sin_addr)) {
 940             __xmlIOErr(XML_FROM_FTP, 0, "gethostbyname address mismatch");
 941             return (-1);
 942         }
 943
 944         /*
 945          * Prepare the socket
 946          */
 947         ((struct sockaddr_in *)&ctxt->ftpAddr)->sin_family = AF_INET;
 948         memcpy (&((struct sockaddr_in *)&ctxt->ftpAddr)->sin_addr,
 949                 hp->h_addr_list[0], hp->h_length);
 950         ((struct sockaddr_in *)&ctxt->ftpAddr)->sin_port =
 951              (unsigned short)htons ((unsigned short)port);
 952         ctxt->controlFd = socket (AF_INET, SOCK_STREAM, 0);
 953         addrlen = sizeof (struct sockaddr_in);
 954     }
 955
 956     if (ctxt->controlFd == INVALID_SOCKET) {
 957         __xmlIOErr(XML_FROM_FTP, 0, "socket failed");
 958         return(-1);
 959     }
 960
 961     /*
 962      * Do the connect.
 963      */
 964     if (connect(ctxt->controlFd, (struct sockaddr *) &ctxt->ftpAddr,
 965             addrlen) < 0) {
 966         __xmlIOErr(XML_FROM_FTP, 0, "Failed to create a connection");
 967         closesocket(ctxt->controlFd); ctxt->controlFd = INVALID_SOCKET;
 968         ctxt->controlFd = INVALID_SOCKET;
 969         return(-1);
 970     }
 971
 972     /*
 973      * Wait for the HELLO from the server.
 974      */
 975     res = xmlNanoFTPGetResponse(ctxt);
 976     if (res != 2) {
 977         closesocket(ctxt->controlFd); ctxt->controlFd = INVALID_SOCKET;
 978         ctxt->controlFd = INVALID_SOCKET;
 979         return(-1);
 980     }
 981
 982     /*
 983      * State diagram for the login operation on the FTP server
 984      *
 985      * Reference: RFC 959
 986      *
 987      *                       1
 988      * +---+   USER    +---+------------->+---+
 989      * | B |---------->| W | 2       ---->| E |
 990      * +---+           +---+------  |  -->+---+
 991      *                  | |       | | |
 992      *                3 | | 4,5   | | |
 993      *    --------------   -----  | | |
 994      *   |                      | | | |
 995      *   |                      | | | |
 996      *   |                 ---------  |
 997      *   |               1|     | |   |
 998      *   V                |     | |   |
 999      * +---+   PASS    +---+ 2  |  ------>+---+
1000      * |   |---------->| W |------------->| S |
1001      * +---+           +---+   ---------->+---+
1002      *                  | |   | |     |
1003      *                3 | |4,5| |     |
1004      *    --------------   --------   |
1005      *   |                    | |  |  |
1006      *   |                    | |  |  |
1007      *   |                 -----------
1008      *   |             1,3|   | |  |
1009      *   V                |  2| |  |
1010      * +---+   ACCT    +---+--  |   ----->+---+
1011      * |   |---------->| W | 4,5 -------->| F |
1012      * +---+           +---+------------->+---+
1013      *
1014      * Of course in case of using a proxy this get really nasty and is not
1015      * standardized at all :-(
1016      */
1017     if (proxy) {
1018         int len;
1019         char buf[400];
1020
1021         if (proxyUser != NULL) {
1022             /*
1023              * We need proxy auth
1024              */
1025             snprintf(buf, sizeof(buf), "USER %s\r\n", proxyUser);
1026             buf[sizeof(buf) - 1] = 0;
1027             len = strlen(buf);
1028 #ifdef DEBUG_FTP
1029             xmlGenericError(xmlGenericErrorContext, "%s", buf);
1030 #endif
1031             res = send(ctxt->controlFd, buf, len, 0);
1032             if (res < 0) {
1033                 __xmlIOErr(XML_FROM_FTP, 0, "send failed");
1034                 closesocket(ctxt->controlFd);
1035                 ctxt->controlFd = INVALID_SOCKET;
1036                 return(res);
1037             }
1038             res = xmlNanoFTPGetResponse(ctxt);
1039             switch (res) {
1040                 case 2:
1041                     if (proxyPasswd == NULL)
1042                         break;
1043                 case 3:
1044                     if (proxyPasswd != NULL)
1045                         snprintf(buf, sizeof(buf), "PASS %s\r\n", proxyPasswd);
1046                     else
1047                         snprintf(buf, sizeof(buf), "PASS anonymous@\r\n");
1048                     buf[sizeof(buf) - 1] = 0;
1049                     len = strlen(buf);
1050 #ifdef DEBUG_FTP
1051                     xmlGenericError(xmlGenericErrorContext, "%s", buf);
1052 #endif
1053                     res = send(ctxt->controlFd, buf, len, 0);
1054                     if (res < 0) {
1055                         __xmlIOErr(XML_FROM_FTP, 0, "send failed");
1056                         closesocket(ctxt->controlFd);
1057                         ctxt->controlFd = INVALID_SOCKET;
1058                         return(res);
1059                     }
1060                     res = xmlNanoFTPGetResponse(ctxt);
1061                     if (res > 3) {
1062                         closesocket(ctxt->controlFd);
1063                         ctxt->controlFd = INVALID_SOCKET;
1064                         return(-1);
1065                     }
1066                     break;
1067                 case 1:
1068                     break;
1069                 case 4:
1070                 case 5:
1071                 case -1:
1072                 default:
1073                     closesocket(ctxt->controlFd);
1074                     ctxt->controlFd = INVALID_SOCKET;
1075                     return(-1);
1076             }
1077         }
1078
1079         /*
1080          * We assume we don't need more authentication to the proxy
1081          * and that it succeeded :-\
1082          */
1083         switch (proxyType) {
1084             case 0:
1085                 /* we will try in sequence */
1086             case 1:
1087                 /* Using SITE command */
1088                 snprintf(buf, sizeof(buf), "SITE %s\r\n", ctxt->hostname);
1089                 buf[sizeof(buf) - 1] = 0;
1090                 len = strlen(buf);
1091 #ifdef DEBUG_FTP
1092                 xmlGenericError(xmlGenericErrorContext, "%s", buf);
1093 #endif
1094                 res = send(ctxt->controlFd, buf, len, 0);
1095                 if (res < 0) {
1096                     __xmlIOErr(XML_FROM_FTP, 0, "send failed");
1097                     closesocket(ctxt->controlFd); ctxt->controlFd = INVALID_SOCKET;
1098                     ctxt->controlFd = INVALID_SOCKET;
1099                     return(res);
1100                 }
1101                 res = xmlNanoFTPGetResponse(ctxt);
1102                 if (res == 2) {
1103                     /* we assume it worked :-\ 1 is error for SITE command */
1104                     proxyType = 1;
1105                     break;
1106                 }
1107                 if (proxyType == 1) {
1108                     closesocket(ctxt->controlFd); ctxt->controlFd = INVALID_SOCKET;
1109                     ctxt->controlFd = INVALID_SOCKET;
1110                     return(-1);
1111                 }
1112             case 2:
1113                 /* USER user@host command */
1114                 if (ctxt->user == NULL)
1115                     snprintf(buf, sizeof(buf), "USER anonymous@%s\r\n",
1116                                    ctxt->hostname);
1117                 else
1118                     snprintf(buf, sizeof(buf), "USER %s@%s\r\n",
1119                                    ctxt->user, ctxt->hostname);
1120                 buf[sizeof(buf) - 1] = 0;
1121                 len = strlen(buf);
1122 #ifdef DEBUG_FTP
1123                 xmlGenericError(xmlGenericErrorContext, "%s", buf);
1124 #endif
1125                 res = send(ctxt->controlFd, buf, len, 0);
1126                 if (res < 0) {
1127                     __xmlIOErr(XML_FROM_FTP, 0, "send failed");
1128                     closesocket(ctxt->controlFd); ctxt->controlFd = INVALID_SOCKET;
1129                     ctxt->controlFd = INVALID_SOCKET;
1130                     return(res);
1131                 }
1132                 res = xmlNanoFTPGetResponse(ctxt);
1133                 if ((res == 1) || (res == 2)) {
1134                     /* we assume it worked :-\ */
1135                     proxyType = 2;
1136                     return(0);
1137                 }
1138                 if (ctxt->passwd == NULL)
1139                     snprintf(buf, sizeof(buf), "PASS anonymous@\r\n");
1140                 else
1141                     snprintf(buf, sizeof(buf), "PASS %s\r\n", ctxt->passwd);
1142                 buf[sizeof(buf) - 1] = 0;
1143                 len = strlen(buf);
1144 #ifdef DEBUG_FTP
1145                 xmlGenericError(xmlGenericErrorContext, "%s", buf);
1146 #endif
1147                 res = send(ctxt->controlFd, buf, len, 0);
1148                 if (res < 0) {
1149                     __xmlIOErr(XML_FROM_FTP, 0, "send failed");
1150                     closesocket(ctxt->controlFd); ctxt->controlFd = INVALID_SOCKET;
1151                     ctxt->controlFd = INVALID_SOCKET;
1152                     return(res);
1153                 }
1154                 res = xmlNanoFTPGetResponse(ctxt);
1155                 if ((res == 1) || (res == 2)) {
1156                     /* we assume it worked :-\ */
1157                     proxyType = 2;
1158                     return(0);
1159                 }
1160                 if (proxyType == 2) {
1161                     closesocket(ctxt->controlFd); ctxt->controlFd = INVALID_SOCKET;
1162                     ctxt->controlFd = INVALID_SOCKET;
1163                     return(-1);
1164                 }
1165             case 3:
1166                 /*
1167                  * If you need support for other Proxy authentication scheme
1168                  * send the code or at least the sequence in use.
1169                  */
1170             default:
1171                 closesocket(ctxt->controlFd); ctxt->controlFd = INVALID_SOCKET;
1172                 ctxt->controlFd = INVALID_SOCKET;
1173                 return(-1);
1174         }
1175     }
1176     /*
1177      * Non-proxy handling.
1178      */
1179     res = xmlNanoFTPSendUser(ctxt);
1180     if (res < 0) {
1181         closesocket(ctxt->controlFd); ctxt->controlFd = INVALID_SOCKET;
1182         ctxt->controlFd = INVALID_SOCKET;
1183         return(-1);
1184     }
1185     res = xmlNanoFTPGetResponse(ctxt);
1186     switch (res) {
1187         case 2:
1188             return(0);
1189         case 3:
1190             break;
1191         case 1:
1192         case 4:
1193         case 5:
1194         case -1:
1195         default:
1196             closesocket(ctxt->controlFd); ctxt->controlFd = INVALID_SOCKET;
1197             ctxt->controlFd = INVALID_SOCKET;
1198             return(-1);
1199     }
1200     res = xmlNanoFTPSendPasswd(ctxt);
1201     if (res < 0) {
1202         closesocket(ctxt->controlFd); ctxt->controlFd = INVALID_SOCKET;
1203         ctxt->controlFd = INVALID_SOCKET;
1204         return(-1);
1205     }
1206     res = xmlNanoFTPGetResponse(ctxt);
1207     switch (res) {
1208         case 2:
1209             break;
1210         case 3:
1211             __xmlIOErr(XML_FROM_FTP, XML_FTP_ACCNT,
1212                        "FTP server asking for ACCNT on anonymous\n");
1213         case 1:
1214         case 4:
1215         case 5:
1216         case -1:
1217         default:
1218             closesocket(ctxt->controlFd); ctxt->controlFd = INVALID_SOCKET;
1219             ctxt->controlFd = INVALID_SOCKET;
1220             return(-1);
1221     }
1222
1223     return(0);
1224 }
1225
1226 /**
1227  * xmlNanoFTPConnectTo:
1228  * @server:  an FTP server name
1229  * @port:  the port (use 21 if 0)
1230  *
1231  * Tries to open a control connection to the given server/port
1232  *
1233  * Returns an fTP context or NULL if it failed
1234  */
1235
1236 void*
1237 xmlNanoFTPConnectTo(const char *server, int port) {
1238     xmlNanoFTPCtxtPtr ctxt;
1239     int res;
1240
1241     xmlNanoFTPInit();
1242     if (server == NULL)
1243         return(NULL);
1244     if (port <= 0)
1245         return(NULL);
1246     ctxt = (xmlNanoFTPCtxtPtr) xmlNanoFTPNewCtxt(NULL);
1247     ctxt->hostname = xmlMemStrdup(server);
1248     if (port != 0)
1249         ctxt->port = port;
1250     res = xmlNanoFTPConnect(ctxt);
1251     if (res < 0) {
1252         xmlNanoFTPFreeCtxt(ctxt);
1253         return(NULL);
1254     }
1255     return(ctxt);
1256 }
1257
1258 /**
1259  * xmlNanoFTPCwd:
1260  * @ctx:  an FTP context
1261  * @directory:  a directory on the server
1262  *
1263  * Tries to change the remote directory
1264  *
1265  * Returns -1 incase of error, 1 if CWD worked, 0 if it failed
1266  */
1267
1268 int
1269 xmlNanoFTPCwd(void *ctx, const char *directory) {
1270     xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
1271     char buf[400];
1272     int len;
1273     int res;
1274
1275     if ((ctxt == NULL) || (ctxt->controlFd == INVALID_SOCKET)) return(-1);
1276     if (directory == NULL) return 0;
1277
1278     /*
1279      * Expected response code for CWD:
1280      *
1281      * CWD
1282      *     250
1283      *     500, 501, 502, 421, 530, 550
1284      */
1285     snprintf(buf, sizeof(buf), "CWD %s\r\n", directory);
1286     buf[sizeof(buf) - 1] = 0;
1287     len = strlen(buf);
1288 #ifdef DEBUG_FTP
1289     xmlGenericError(xmlGenericErrorContext, "%s", buf);
1290 #endif
1291     res = send(ctxt->controlFd, buf, len, 0);
1292     if (res < 0) {
1293         __xmlIOErr(XML_FROM_FTP, 0, "send failed");
1294         return(res);
1295     }
1296     res = xmlNanoFTPGetResponse(ctxt);
1297     if (res == 4) {
1298         return(-1);
1299     }
1300     if (res == 2) return(1);
1301     if (res == 5) {
1302         return(0);
1303     }
1304     return(0);
1305 }
1306
1307 /**
1308  * xmlNanoFTPDele:
1309  * @ctx:  an FTP context
1310  * @file:  a file or directory on the server
1311  *
1312  * Tries to delete an item (file or directory) from server
1313  *
1314  * Returns -1 incase of error, 1 if DELE worked, 0 if it failed
1315  */
1316
1317 int
1318 xmlNanoFTPDele(void *ctx, const char *file) {
1319     xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
1320     char buf[400];
1321     int len;
1322     int res;
1323
1324     if ((ctxt == NULL) || (ctxt->controlFd == INVALID_SOCKET) || (file == NULL)) return(-1);
1325     if (file == NULL) return (0);
1326
1327     /*
1328      * Expected response code for DELE:
1329      *
1330      * DELE
1331      *       250
1332      *       450, 550
1333      *       500, 501, 502, 421, 530
1334      */
1335
1336     snprintf(buf, sizeof(buf), "DELE %s\r\n", file);
1337     buf[sizeof(buf) - 1] = 0;
1338     len = strlen(buf);
1339 #ifdef DEBUG_FTP
1340     xmlGenericError(xmlGenericErrorContext, "%s", buf);
1341 #endif
1342     res = send(ctxt->controlFd, buf, len, 0);
1343     if (res < 0) {
1344         __xmlIOErr(XML_FROM_FTP, 0, "send failed");
1345         return(res);
1346     }
1347     res = xmlNanoFTPGetResponse(ctxt);
1348     if (res == 4) {
1349         return(-1);
1350     }
1351     if (res == 2) return(1);
1352     if (res == 5) {
1353         return(0);
1354     }
1355     return(0);
1356 }
1357 /**
1358  * xmlNanoFTPGetConnection:
1359  * @ctx:  an FTP context
1360  *
1361  * Try to open a data connection to the server. Currently only
1362  * passive mode is supported.
1363  *
1364  * Returns -1 incase of error, 0 otherwise
1365  */
1366
1367 SOCKET
1368 xmlNanoFTPGetConnection(void *ctx) {
1369     xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
1370     char buf[200], *cur;
1371     int len, i;
1372     int res;
1373     unsigned char ad[6], *adp, *portp;
1374     unsigned int temp[6];
1375 #ifdef SUPPORT_IP6
1376     struct sockaddr_storage dataAddr;
1377 #else
1378     struct sockaddr_in dataAddr;
1379 #endif
1380     XML_SOCKLEN_T dataAddrLen;
1381
1382     if (ctxt == NULL) return INVALID_SOCKET;
1383
1384     memset (&dataAddr, 0, sizeof(dataAddr));
1385 #ifdef SUPPORT_IP6
1386     if ((ctxt->ftpAddr).ss_family == AF_INET6) {
1387         ctxt->dataFd = socket (AF_INET6, SOCK_STREAM, IPPROTO_TCP);
1388         ((struct sockaddr_in6 *)&dataAddr)->sin6_family = AF_INET6;
1389         dataAddrLen = sizeof(struct sockaddr_in6);
1390     } else
1391 #endif
1392     {
1393         ctxt->dataFd = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP);
1394         ((struct sockaddr_in *)&dataAddr)->sin_family = AF_INET;
1395         dataAddrLen = sizeof (struct sockaddr_in);
1396     }
1397
1398     if (ctxt->dataFd == INVALID_SOCKET) {
1399         __xmlIOErr(XML_FROM_FTP, 0, "socket failed");
1400         return INVALID_SOCKET;
1401     }
1402
1403     if (ctxt->passive) {
1404 #ifdef SUPPORT_IP6
1405         if ((ctxt->ftpAddr).ss_family == AF_INET6)
1406             snprintf (buf, sizeof(buf), "EPSV\r\n");
1407         else
1408 #endif
1409             snprintf (buf, sizeof(buf), "PASV\r\n");
1410         len = strlen (buf);
1411 #ifdef DEBUG_FTP
1412         xmlGenericError(xmlGenericErrorContext, "%s", buf);
1413 #endif
1414         res = send(ctxt->controlFd, buf, len, 0);
1415         if (res < 0) {
1416             __xmlIOErr(XML_FROM_FTP, 0, "send failed");
1417             closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
1418             return INVALID_SOCKET;
1419         }
1420         res = xmlNanoFTPReadResponse(ctx);
1421         if (res != 2) {
1422             if (res == 5) {
1423                 closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
1424                 return INVALID_SOCKET;
1425             } else {
1426                 /*
1427                  * retry with an active connection
1428                  */
1429                 closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
1430                 ctxt->passive = 0;
1431             }
1432         }
1433         cur = &ctxt->controlBuf[ctxt->controlBufAnswer];
1434         while (((*cur < '0') || (*cur > '9')) && *cur != '\0') cur++;
1435 #ifdef SUPPORT_IP6
1436         if ((ctxt->ftpAddr).ss_family == AF_INET6) {
1437             if (sscanf (cur, "%u", &temp[0]) != 1) {
1438                 __xmlIOErr(XML_FROM_FTP, XML_FTP_EPSV_ANSWER,
1439                         "Invalid answer to EPSV\n");
1440                 if (ctxt->dataFd != INVALID_SOCKET) {
1441                     closesocket (ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
1442                 }
1443                 return INVALID_SOCKET;
1444             }
1445             memcpy (&((struct sockaddr_in6 *)&dataAddr)->sin6_addr, &((struct sockaddr_in6 *)&ctxt->ftpAddr)->sin6_addr, sizeof(struct in6_addr));
1446             ((struct sockaddr_in6 *)&dataAddr)->sin6_port = htons (temp[0]);
1447         }
1448         else
1449 #endif
1450         {
1451             if (sscanf (cur, "%u,%u,%u,%u,%u,%u", &temp[0], &temp[1], &temp[2],
1452                 &temp[3], &temp[4], &temp[5]) != 6) {
1453                 __xmlIOErr(XML_FROM_FTP, XML_FTP_PASV_ANSWER,
1454                         "Invalid answer to PASV\n");
1455                 if (ctxt->dataFd != INVALID_SOCKET) {
1456                     closesocket (ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
1457                 }
1458                 return INVALID_SOCKET;
1459             }
1460             for (i=0; i<6; i++) ad[i] = (unsigned char) (temp[i] & 0xff);
1461             memcpy (&((struct sockaddr_in *)&dataAddr)->sin_addr, &ad[0], 4);
1462             memcpy (&((struct sockaddr_in *)&dataAddr)->sin_port, &ad[4], 2);
1463         }
1464
1465         if (connect(ctxt->dataFd, (struct sockaddr *) &dataAddr, dataAddrLen) < 0) {
1466             __xmlIOErr(XML_FROM_FTP, 0, "Failed to create a data connection");
1467             closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
1468             return INVALID_SOCKET;
1469         }
1470     } else {
1471         getsockname(ctxt->dataFd, (struct sockaddr *) &dataAddr, &dataAddrLen);
1472 #ifdef SUPPORT_IP6
1473         if ((ctxt->ftpAddr).ss_family == AF_INET6)
1474             ((struct sockaddr_in6 *)&dataAddr)->sin6_port = 0;
1475         else
1476 #endif
1477             ((struct sockaddr_in *)&dataAddr)->sin_port = 0;
1478
1479         if (bind(ctxt->dataFd, (struct sockaddr *) &dataAddr, dataAddrLen) < 0) {
1480             __xmlIOErr(XML_FROM_FTP, 0, "bind failed");
1481             closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
1482             return INVALID_SOCKET;
1483         }
1484         getsockname(ctxt->dataFd, (struct sockaddr *) &dataAddr, &dataAddrLen);
1485
1486         if (listen(ctxt->dataFd, 1) < 0) {
1487             __xmlIOErr(XML_FROM_FTP, 0, "listen failed");
1488             closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
1489             return INVALID_SOCKET;
1490         }
1491 #ifdef SUPPORT_IP6
1492         if ((ctxt->ftpAddr).ss_family == AF_INET6) {
1493             char buf6[INET6_ADDRSTRLEN];
1494             inet_ntop (AF_INET6, &((struct sockaddr_in6 *)&dataAddr)->sin6_addr,
1495                     buf6, INET6_ADDRSTRLEN);
1496             adp = (unsigned char *) buf6;
1497             portp = (unsigned char *) &((struct sockaddr_in6 *)&dataAddr)->sin6_port;
1498             snprintf (buf, sizeof(buf), "EPRT |2|%s|%s|\r\n", adp, portp);
1499         } else
1500 #endif
1501         {
1502             adp = (unsigned char *) &((struct sockaddr_in *)&dataAddr)->sin_addr;
1503             portp = (unsigned char *) &((struct sockaddr_in *)&dataAddr)->sin_port;
1504             snprintf (buf, sizeof(buf), "PORT %d,%d,%d,%d,%d,%d\r\n",
1505             adp[0] & 0xff, adp[1] & 0xff, adp[2] & 0xff, adp[3] & 0xff,
1506             portp[0] & 0xff, portp[1] & 0xff);
1507         }
1508
1509         buf[sizeof(buf) - 1] = 0;
1510         len = strlen(buf);
1511 #ifdef DEBUG_FTP
1512         xmlGenericError(xmlGenericErrorContext, "%s", buf);
1513 #endif
1514
1515         res = send(ctxt->controlFd, buf, len, 0);
1516         if (res < 0) {
1517             __xmlIOErr(XML_FROM_FTP, 0, "send failed");
1518             closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
1519             return INVALID_SOCKET;
1520         }
1521         res = xmlNanoFTPGetResponse(ctxt);
1522         if (res != 2) {
1523             closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
1524             return INVALID_SOCKET;
1525         }
1526     }
1527     return(ctxt->dataFd);
1528
1529 }
1530
1531 /**
1532  * xmlNanoFTPCloseConnection:
1533  * @ctx:  an FTP context
1534  *
1535  * Close the data connection from the server
1536  *
1537  * Returns -1 incase of error, 0 otherwise
1538  */
1539
1540 int
1541 xmlNanoFTPCloseConnection(void *ctx) {
1542     xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
1543     int res;
1544     fd_set rfd, efd;
1545     struct timeval tv;
1546
1547     if ((ctxt == NULL) || (ctxt->controlFd == INVALID_SOCKET)) return(-1);
1548
1549     closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
1550     tv.tv_sec = 15;
1551     tv.tv_usec = 0;
1552     FD_ZERO(&rfd);
1553     FD_SET(ctxt->controlFd, &rfd);
1554     FD_ZERO(&efd);
1555     FD_SET(ctxt->controlFd, &efd);
1556     res = select(ctxt->controlFd + 1, &rfd, NULL, &efd, &tv);
1557     if (res < 0) {
1558 #ifdef DEBUG_FTP
1559         perror("select");
1560 #endif
1561         closesocket(ctxt->controlFd); ctxt->controlFd = INVALID_SOCKET;
1562         return(-1);
1563     }
1564     if (res == 0) {
1565 #ifdef DEBUG_FTP
1566         xmlGenericError(xmlGenericErrorContext,
1567                 "xmlNanoFTPCloseConnection: timeout\n");
1568 #endif
1569         closesocket(ctxt->controlFd); ctxt->controlFd = INVALID_SOCKET;
1570     } else {
1571         res = xmlNanoFTPGetResponse(ctxt);
1572         if (res != 2) {
1573             closesocket(ctxt->controlFd); ctxt->controlFd = INVALID_SOCKET;
1574             return(-1);
1575         }
1576     }
1577     return(0);
1578 }
1579
1580 /**
1581  * xmlNanoFTPParseList:
1582  * @list:  some data listing received from the server
1583  * @callback:  the user callback
1584  * @userData:  the user callback data
1585  *
1586  * Parse at most one entry from the listing.
1587  *
1588  * Returns -1 incase of error, the length of data parsed otherwise
1589  */
1590
1591 static int
1592 xmlNanoFTPParseList(const char *list, ftpListCallback callback, void *userData) {
1593     const char *cur = list;
1594     char filename[151];
1595     char attrib[11];
1596     char owner[11];
1597     char group[11];
1598     char month[4];
1599     int year = 0;
1600     int minute = 0;
1601     int hour = 0;
1602     int day = 0;
1603     unsigned long size = 0;
1604     int links = 0;
1605     int i;
1606
1607     if (!strncmp(cur, "total", 5)) {
1608         cur += 5;
1609         while (*cur == ' ') cur++;
1610         while ((*cur >= '0') && (*cur <= '9'))
1611             links = (links * 10) + (*cur++ - '0');
1612         while ((*cur == ' ') || (*cur == '\n')  || (*cur == '\r'))
1613             cur++;
1614         return(cur - list);
1615     } else if (*list == '+') {
1616         return(0);
1617     } else {
1618         while ((*cur == ' ') || (*cur == '\n')  || (*cur == '\r'))
1619             cur++;
1620         if (*cur == 0) return(0);
1621         i = 0;
1622         while (*cur != ' ') {
1623             if (i < 10)
1624                 attrib[i++] = *cur;
1625             cur++;
1626             if (*cur == 0) return(0);
1627         }
1628         attrib[10] = 0;
1629         while (*cur == ' ') cur++;
1630         if (*cur == 0) return(0);
1631         while ((*cur >= '0') && (*cur <= '9'))
1632             links = (links * 10) + (*cur++ - '0');
1633         while (*cur == ' ') cur++;
1634         if (*cur == 0) return(0);
1635         i = 0;
1636         while (*cur != ' ') {
1637             if (i < 10)
1638                 owner[i++] = *cur;
1639             cur++;
1640             if (*cur == 0) return(0);
1641         }
1642         owner[i] = 0;
1643         while (*cur == ' ') cur++;
1644         if (*cur == 0) return(0);
1645         i = 0;
1646         while (*cur != ' ') {
1647             if (i < 10)
1648                 group[i++] = *cur;
1649             cur++;
1650             if (*cur == 0) return(0);
1651         }
1652         group[i] = 0;
1653         while (*cur == ' ') cur++;
1654         if (*cur == 0) return(0);
1655         while ((*cur >= '0') && (*cur <= '9'))
1656             size = (size * 10) + (*cur++ - '0');
1657         while (*cur == ' ') cur++;
1658         if (*cur == 0) return(0);
1659         i = 0;
1660         while (*cur != ' ') {
1661             if (i < 3)
1662                 month[i++] = *cur;
1663             cur++;
1664             if (*cur == 0) return(0);
1665         }
1666         month[i] = 0;
1667         while (*cur == ' ') cur++;
1668         if (*cur == 0) return(0);
1669         while ((*cur >= '0') && (*cur <= '9'))
1670             day = (day * 10) + (*cur++ - '0');
1671         while (*cur == ' ') cur++;
1672         if (*cur == 0) return(0);
1673         if ((cur[1] == 0) || (cur[2] == 0)) return(0);
1674         if ((cur[1] == ':') || (cur[2] == ':')) {
1675             while ((*cur >= '0') && (*cur <= '9'))
1676                 hour = (hour * 10) + (*cur++ - '0');
1677             if (*cur == ':') cur++;
1678             while ((*cur >= '0') && (*cur <= '9'))
1679                 minute = (minute * 10) + (*cur++ - '0');
1680         } else {
1681             while ((*cur >= '0') && (*cur <= '9'))
1682                 year = (year * 10) + (*cur++ - '0');
1683         }
1684         while (*cur == ' ') cur++;
1685         if (*cur == 0) return(0);
1686         i = 0;
1687         while ((*cur != '\n')  && (*cur != '\r')) {
1688             if (i < 150)
1689                 filename[i++] = *cur;
1690             cur++;
1691             if (*cur == 0) return(0);
1692         }
1693         filename[i] = 0;
1694         if ((*cur != '\n') && (*cur != '\r'))
1695             return(0);
1696         while ((*cur == '\n')  || (*cur == '\r'))
1697             cur++;
1698     }
1699     if (callback != NULL) {
1700         callback(userData, filename, attrib, owner, group, size, links,
1701                  year, month, day, hour, minute);
1702     }
1703     return(cur - list);
1704 }
1705
1706 /**
1707  * xmlNanoFTPList:
1708  * @ctx:  an FTP context
1709  * @callback:  the user callback
1710  * @userData:  the user callback data
1711  * @filename:  optional files to list
1712  *
1713  * Do a listing on the server. All files info are passed back
1714  * in the callbacks.
1715  *
1716  * Returns -1 incase of error, 0 otherwise
1717  */
1718
1719 int
1720 xmlNanoFTPList(void *ctx, ftpListCallback callback, void *userData,
1721                const char *filename) {
1722     xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
1723     char buf[4096 + 1];
1724     int len, res;
1725     int indx = 0, base;
1726     fd_set rfd, efd;
1727     struct timeval tv;
1728
1729     if (ctxt == NULL) return (-1);
1730     if (filename == NULL) {
1731         if (xmlNanoFTPCwd(ctxt, ctxt->path) < 1)
1732             return(-1);
1733         ctxt->dataFd = xmlNanoFTPGetConnection(ctxt);
1734         if (ctxt->dataFd == INVALID_SOCKET)
1735             return(-1);
1736         snprintf(buf, sizeof(buf), "LIST -L\r\n");
1737     } else {
1738         if (filename[0] != '/') {
1739             if (xmlNanoFTPCwd(ctxt, ctxt->path) < 1)
1740                 return(-1);
1741         }
1742         ctxt->dataFd = xmlNanoFTPGetConnection(ctxt);
1743         if (ctxt->dataFd == INVALID_SOCKET)
1744             return(-1);
1745         snprintf(buf, sizeof(buf), "LIST -L %s\r\n", filename);
1746     }
1747     buf[sizeof(buf) - 1] = 0;
1748     len = strlen(buf);
1749 #ifdef DEBUG_FTP
1750     xmlGenericError(xmlGenericErrorContext, "%s", buf);
1751 #endif
1752     res = send(ctxt->controlFd, buf, len, 0);
1753     if (res < 0) {
1754         __xmlIOErr(XML_FROM_FTP, 0, "send failed");
1755         closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
1756         return(res);
1757     }
1758     res = xmlNanoFTPReadResponse(ctxt);
1759     if (res != 1) {
1760         closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
1761         return(-res);
1762     }
1763
1764     do {
1765         tv.tv_sec = 1;
1766         tv.tv_usec = 0;
1767         FD_ZERO(&rfd);
1768         FD_SET(ctxt->dataFd, &rfd);
1769         FD_ZERO(&efd);
1770         FD_SET(ctxt->dataFd, &efd);
1771         res = select(ctxt->dataFd + 1, &rfd, NULL, &efd, &tv);
1772         if (res < 0) {
1773 #ifdef DEBUG_FTP
1774             perror("select");
1775 #endif
1776             closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
1777             return(-1);
1778         }
1779         if (res == 0) {
1780             res = xmlNanoFTPCheckResponse(ctxt);
1781             if (res < 0) {
1782                 closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
1783                 ctxt->dataFd = INVALID_SOCKET;
1784                 return(-1);
1785             }
1786             if (res == 2) {
1787                 closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
1788                 return(0);
1789             }
1790
1791             continue;
1792         }
1793
1794         if ((len = recv(ctxt->dataFd, &buf[indx], sizeof(buf) - (indx + 1), 0)) < 0) {
1795             __xmlIOErr(XML_FROM_FTP, 0, "recv");
1796             closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
1797             ctxt->dataFd = INVALID_SOCKET;
1798             return(-1);
1799         }
1800 #ifdef DEBUG_FTP
1801         write(1, &buf[indx], len);
1802 #endif
1803         indx += len;
1804         buf[indx] = 0;
1805         base = 0;
1806         do {
1807             res = xmlNanoFTPParseList(&buf[base], callback, userData);
1808             base += res;
1809         } while (res > 0);
1810
1811         memmove(&buf[0], &buf[base], indx - base);
1812         indx -= base;
1813     } while (len != 0);
1814     xmlNanoFTPCloseConnection(ctxt);
1815     return(0);
1816 }
1817
1818 /**
1819  * xmlNanoFTPGetSocket:
1820  * @ctx:  an FTP context
1821  * @filename:  the file to retrieve (or NULL if path is in context).
1822  *
1823  * Initiate fetch of the given file from the server.
1824  *
1825  * Returns the socket for the data connection, or <0 in case of error
1826  */
1827
1828
1829 SOCKET
1830 xmlNanoFTPGetSocket(void *ctx, const char *filename) {
1831     xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
1832     char buf[300];
1833     int res, len;
1834     if (ctx == NULL)
1835         return INVALID_SOCKET;
1836     if ((filename == NULL) && (ctxt->path == NULL))
1837         return INVALID_SOCKET;
1838     ctxt->dataFd = xmlNanoFTPGetConnection(ctxt);
1839     if (ctxt->dataFd == INVALID_SOCKET)
1840         return INVALID_SOCKET;
1841
1842     snprintf(buf, sizeof(buf), "TYPE I\r\n");
1843     len = strlen(buf);
1844 #ifdef DEBUG_FTP
1845     xmlGenericError(xmlGenericErrorContext, "%s", buf);
1846 #endif
1847     res = send(ctxt->controlFd, buf, len, 0);
1848     if (res < 0) {
1849         __xmlIOErr(XML_FROM_FTP, 0, "send failed");
1850         closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
1851         return INVALID_SOCKET;
1852     }
1853     res = xmlNanoFTPReadResponse(ctxt);
1854     if (res != 2) {
1855         closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
1856         return INVALID_SOCKET;
1857     }
1858     if (filename == NULL)
1859         snprintf(buf, sizeof(buf), "RETR %s\r\n", ctxt->path);
1860     else
1861         snprintf(buf, sizeof(buf), "RETR %s\r\n", filename);
1862     buf[sizeof(buf) - 1] = 0;
1863     len = strlen(buf);
1864 #ifdef DEBUG_FTP
1865     xmlGenericError(xmlGenericErrorContext, "%s", buf);
1866 #endif
1867     res = send(ctxt->controlFd, buf, len, 0);
1868     if (res < 0) {
1869         __xmlIOErr(XML_FROM_FTP, 0, "send failed");
1870         closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
1871         return INVALID_SOCKET;
1872     }
1873     res = xmlNanoFTPReadResponse(ctxt);
1874     if (res != 1) {
1875         closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
1876         return INVALID_SOCKET;
1877     }
1878     return(ctxt->dataFd);
1879 }
1880
1881 /**
1882  * xmlNanoFTPGet:
1883  * @ctx:  an FTP context
1884  * @callback:  the user callback
1885  * @userData:  the user callback data
1886  * @filename:  the file to retrieve
1887  *
1888  * Fetch the given file from the server. All data are passed back
1889  * in the callbacks. The last callback has a size of 0 block.
1890  *
1891  * Returns -1 incase of error, 0 otherwise
1892  */
1893
1894 int
1895 xmlNanoFTPGet(void *ctx, ftpDataCallback callback, void *userData,
1896               const char *filename) {
1897     xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
1898     char buf[4096];
1899     int len = 0, res;
1900     fd_set rfd;
1901     struct timeval tv;
1902
1903     if (ctxt == NULL) return(-1);
1904     if ((filename == NULL) && (ctxt->path == NULL))
1905         return(-1);
1906     if (callback == NULL)
1907         return(-1);
1908     if (xmlNanoFTPGetSocket(ctxt, filename) == INVALID_SOCKET)
1909         return(-1);
1910
1911     do {
1912         tv.tv_sec = 1;
1913         tv.tv_usec = 0;
1914         FD_ZERO(&rfd);
1915         FD_SET(ctxt->dataFd, &rfd);
1916         res = select(ctxt->dataFd + 1, &rfd, NULL, NULL, &tv);
1917         if (res < 0) {
1918 #ifdef DEBUG_FTP
1919             perror("select");
1920 #endif
1921             closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
1922             return(-1);
1923         }
1924         if (res == 0) {
1925             res = xmlNanoFTPCheckResponse(ctxt);
1926             if (res < 0) {
1927                 closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
1928                 ctxt->dataFd = INVALID_SOCKET;
1929                 return(-1);
1930             }
1931             if (res == 2) {
1932                 closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
1933                 return(0);
1934             }
1935
1936             continue;
1937         }
1938         if ((len = recv(ctxt->dataFd, buf, sizeof(buf), 0)) < 0) {
1939             __xmlIOErr(XML_FROM_FTP, 0, "recv failed");
1940             callback(userData, buf, len);
1941             closesocket(ctxt->dataFd); ctxt->dataFd = INVALID_SOCKET;
1942             return(-1);
1943         }
1944         callback(userData, buf, len);
1945     } while (len != 0);
1946
1947     return(xmlNanoFTPCloseConnection(ctxt));
1948 }
1949
1950 /**
1951  * xmlNanoFTPRead:
1952  * @ctx:  the FTP context
1953  * @dest:  a buffer
1954  * @len:  the buffer length
1955  *
1956  * This function tries to read @len bytes from the existing FTP connection
1957  * and saves them in @dest. This is a blocking call.
1958  *
1959  * Returns the number of byte read. 0 is an indication of an end of connection.
1960  *         -1 indicates a parameter error.
1961  */
1962 int
1963 xmlNanoFTPRead(void *ctx, void *dest, int len) {
1964     xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
1965
1966     if (ctx == NULL) return(-1);
1967     if (ctxt->dataFd == INVALID_SOCKET) return(0);
1968     if (dest == NULL) return(-1);
1969     if (len <= 0) return(0);
1970
1971     len = recv(ctxt->dataFd, dest, len, 0);
1972     if (len <= 0) {
1973         if (len < 0)
1974             __xmlIOErr(XML_FROM_FTP, 0, "recv failed");
1975         xmlNanoFTPCloseConnection(ctxt);
1976     }
1977 #ifdef DEBUG_FTP
1978     xmlGenericError(xmlGenericErrorContext, "Recvd %d bytes\n", len);
1979 #endif
1980     return(len);
1981 }
1982
1983 /**
1984  * xmlNanoFTPOpen:
1985  * @URL: the URL to the resource
1986  *
1987  * Start to fetch the given ftp:// resource
1988  *
1989  * Returns an FTP context, or NULL
1990  */
1991
1992 void*
1993 xmlNanoFTPOpen(const char *URL) {
1994     xmlNanoFTPCtxtPtr ctxt;
1995     SOCKET sock;
1996
1997     xmlNanoFTPInit();
1998     if (URL == NULL) return(NULL);
1999     if (strncmp("ftp://", URL, 6)) return(NULL);
2000
2001     ctxt = (xmlNanoFTPCtxtPtr) xmlNanoFTPNewCtxt(URL);
2002     if (ctxt == NULL) return(NULL);
2003     if (xmlNanoFTPConnect(ctxt) < 0) {
2004         xmlNanoFTPFreeCtxt(ctxt);
2005         return(NULL);
2006     }
2007     sock = xmlNanoFTPGetSocket(ctxt, ctxt->path);
2008     if (sock == INVALID_SOCKET) {
2009         xmlNanoFTPFreeCtxt(ctxt);
2010         return(NULL);
2011     }
2012     return(ctxt);
2013 }
2014
2015 /**
2016  * xmlNanoFTPClose:
2017  * @ctx: an FTP context
2018  *
2019  * Close the connection and both control and transport
2020  *
2021  * Returns -1 incase of error, 0 otherwise
2022  */
2023
2024 int
2025 xmlNanoFTPClose(void *ctx) {
2026     xmlNanoFTPCtxtPtr ctxt = (xmlNanoFTPCtxtPtr) ctx;
2027
2028     if (ctxt == NULL)
2029         return(-1);
2030
2031     if (ctxt->dataFd != INVALID_SOCKET) {
2032         closesocket(ctxt->dataFd);
2033         ctxt->dataFd = INVALID_SOCKET;
2034     }
2035     if (ctxt->controlFd != INVALID_SOCKET) {
2036         xmlNanoFTPQuit(ctxt);
2037         closesocket(ctxt->controlFd);
2038         ctxt->controlFd = INVALID_SOCKET;
2039     }
2040     xmlNanoFTPFreeCtxt(ctxt);
2041     return(0);
2042 }
2043
2044 #ifdef STANDALONE
2045 /************************************************************************
2046  *                                                                      *
2047  *                      Basic test in Standalone mode                   *
2048  *                                                                      *
2049  ************************************************************************/
2050 static
2051 void ftpList(void *userData, const char *filename, const char* attrib,
2052              const char *owner, const char *group, unsigned long size, int links,
2053              int year, const char *month, int day, int hour, int minute) {
2054     xmlGenericError(xmlGenericErrorContext,
2055             "%s %s %s %ld %s\n", attrib, owner, group, size, filename);
2056 }
2057 static
2058 void ftpData(void *userData, const char *data, int len) {
2059     if (userData == NULL) return;
2060     if (len <= 0) {
2061         fclose((FILE*)userData);
2062         return;
2063     }
2064     fwrite(data, len, 1, (FILE*)userData);
2065 }
2066
2067 int main(int argc, char **argv) {
2068     void *ctxt;
2069     FILE *output;
2070     char *tstfile = NULL;
2071
2072     xmlNanoFTPInit();
2073     if (argc > 1) {
2074         ctxt = xmlNanoFTPNewCtxt(argv[1]);
2075         if (xmlNanoFTPConnect(ctxt) < 0) {
2076             xmlGenericError(xmlGenericErrorContext,
2077                     "Couldn't connect to %s\n", argv[1]);
2078             exit(1);
2079         }
2080         if (argc > 2)
2081             tstfile = argv[2];
2082     } else
2083         ctxt = xmlNanoFTPConnectTo("localhost", 0);
2084     if (ctxt == NULL) {
2085         xmlGenericError(xmlGenericErrorContext,
2086                 "Couldn't connect to localhost\n");
2087         exit(1);
2088     }
2089     xmlNanoFTPList(ctxt, ftpList, NULL, tstfile);
2090     output = fopen("/tmp/tstdata", "w");
2091     if (output != NULL) {
2092         if (xmlNanoFTPGet(ctxt, ftpData, (void *) output, tstfile) < 0)
2093             xmlGenericError(xmlGenericErrorContext,
2094                     "Failed to get file\n");
2095
2096     }
2097     xmlNanoFTPClose(ctxt);
2098     xmlMemoryDump();
2099     exit(0);
2100 }
2101 #endif /* STANDALONE */
2102 #else /* !LIBXML_FTP_ENABLED */
2103 #ifdef STANDALONE
2104 #include <stdio.h>
2105 int main(int argc, char **argv) {
2106     xmlGenericError(xmlGenericErrorContext,
2107             "%s : FTP support not compiled in\n", argv[0]);
2108     return(0);
2109 }
2110 #endif /* STANDALONE */
2111 #endif /* LIBXML_FTP_ENABLED */
2112 #define bottom_nanoftp
2113 #include "elfgcchack.h"