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
have_ipv6(void)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
xmlFTPErrMemory(const char * extra)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
xmlNanoFTPInit(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
xmlNanoFTPCleanup(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
xmlNanoFTPProxy(const char * host,int port,const char * user,const char * passwd,int type)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
xmlNanoFTPScanURL(void * ctx,const char * URL)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
xmlNanoFTPUpdateURL(void * ctx,const char * URL)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
xmlNanoFTPScanProxy(const char * URL)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*
xmlNanoFTPNewCtxt(const char * URL)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
xmlNanoFTPFreeCtxt(void * ctx)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
xmlNanoFTPParseResponse(char * buf,int len)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
xmlNanoFTPGetMore(void * ctx)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
xmlNanoFTPReadResponse(void * ctx)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
xmlNanoFTPGetResponse(void * ctx)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
xmlNanoFTPCheckResponse(void * ctx)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
xmlNanoFTPSendUser(void * ctx)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
xmlNanoFTPSendPasswd(void * ctx)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
xmlNanoFTPQuit(void * ctx)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
xmlNanoFTPConnect(void * ctx)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*
xmlNanoFTPConnectTo(const char * server,int port)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
xmlNanoFTPCwd(void * ctx,const char * directory)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
xmlNanoFTPDele(void * ctx,const char * file)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
xmlNanoFTPGetConnection(void * ctx)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
xmlNanoFTPCloseConnection(void * ctx)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
xmlNanoFTPParseList(const char * list,ftpListCallback callback,void * userData)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
xmlNanoFTPList(void * ctx,ftpListCallback callback,void * userData,const char * filename)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
xmlNanoFTPGetSocket(void * ctx,const char * filename)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
xmlNanoFTPGet(void * ctx,ftpDataCallback callback,void * userData,const char * filename)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
xmlNanoFTPRead(void * ctx,void * dest,int len)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*
xmlNanoFTPOpen(const char * URL)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
xmlNanoFTPClose(void * ctx)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
ftpList(void * userData,const char * filename,const char * attrib,const char * owner,const char * group,unsigned long size,int links,int year,const char * month,int day,int hour,int minute)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
ftpData(void * userData,const char * data,int len)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 
main(int argc,char ** argv)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>
main(int argc,char ** argv)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"
2114