Annotation of libwww/Library/src/HTFTP.c, revision 1.76
1.46 frystyk 1: /* HTFTP.c
2: ** FILE TRANSFER PROTOCOL (FTP) CLIENT
3: **
1.52 frystyk 4: ** (c) COPYRIGHT MIT 1995.
1.46 frystyk 5: ** Please first read the full copyright statement in the file COPYRIGH.
1.1 timbl 6: **
7: ** A cache of control connections is kept.
8: **
9: ** Note: Port allocation
10: **
11: ** It is essential that the port is allocated by the system, rather
12: ** than chosen in rotation by us (POLL_PORTS), or the following
13: ** problem occurs.
14: **
15: ** It seems that an attempt by the server to connect to a port which has
16: ** been used recently by a listen on the same socket, or by another
17: ** socket this or another process causes a hangup of (almost exactly)
18: ** one minute. Therefore, we have to use a rotating port number.
19: ** The problem remains that if the application is run twice in quick
20: ** succession, it will hang for what remains of a minute.
21: **
22: ** Authors
1.54 frystyk 23: ** TBL Tim Berners-lee <timbl@w3.org>
1.1 timbl 24: ** DD Denis DeLaRoca 310 825-4580 <CSP1DWD@mvs.oac.ucla.edu>
1.22 frystyk 25: ** LM Lou Montulli <montulli@ukanaix.cc.ukans.edu>
26: ** FM Foteos Macrides <macrides@sci.wfeb.edu>
1.54 frystyk 27: ** HF Henrik Frystyk <frystyk@w3.org>
1.30 luotonen 28: ** AL Ari Luotonen <luotonen@www.cern.ch>
1.23 frystyk 29: **
1.1 timbl 30: ** History:
31: ** 2 May 91 Written TBL, as a part of the WorldWideWeb project.
32: ** 15 Jan 92 Bug fix: close() was used for NETCLOSE for control soc
33: ** 10 Feb 92 Retry if cached connection times out or breaks
34: ** 8 Dec 92 Bug fix 921208 TBL after DD
35: ** 17 Dec 92 Anon FTP password now just WWWuser@ suggested by DD
1.2 timbl 36: ** fails on princeton.edu!
1.22 frystyk 37: ** 27 Dec 93 (FM) Fixed up so FTP now works with VMS hosts. Path
38: ** must be Unix-style and cannot include the device
39: ** or top directory.
40: ** ?? ??? ?? (LM) Added code to prompt and send passwords for non
41: ** anonymous FTP
42: ** 25 Mar 94 (LM) Added code to recognize different ftp server types
43: ** and code to parse dates and sizes on most hosts.
44: ** 27 Mar 93 (FM) Added code for getting dates and sizes on VMS hosts.
1.23 frystyk 45: ** 27 Apr 94 (HF) The module is basically rewritten to conform with
46: ** rfc 959, 1123 and 1579 and turned into a state
47: ** machine. New semantics of ftp URLs are supported.
1.30 luotonen 48: ** 2 May 94 (AL) Fixed possible security hole when the URL contains
49: ** a newline, that could cause multiple commands to be
50: ** sent to an FTP server.
1.60 frystyk 51: ** Sep 95 HFN Rewritten to support streams and persistent conenctions
52: ** and multiplexed IO
1.22 frystyk 53: ** Notes:
54: ** Portions Copyright 1994 Trustees of Dartmouth College
55: ** Code for recognizing different FTP servers and
56: ** parsing "ls -l" output taken from Macintosh Fetch
57: ** program with permission from Jim Matthews,
58: ** Dartmouth Software Development Team.
1.23 frystyk 59: */
1.1 timbl 60:
1.22 frystyk 61: /* Library include files */
1.48 frystyk 62: #include "tcp.h"
63: #include "HTUtils.h"
64: #include "HTString.h"
1.1 timbl 65: #include "HTParse.h"
66: #include "HTTCP.h"
67: #include "HTAnchor.h"
1.51 frystyk 68: #include "HTBind.h"
1.53 frystyk 69: #include "HTSocket.h"
1.60 frystyk 70: #include "HTWriter.h"
1.6 secret 71: #include "HTChunk.h"
1.22 frystyk 72: #include "HTAlert.h"
1.60 frystyk 73: #include "HTFormat.h"
74: #include "HTStream.h"
1.33 frystyk 75: #include "HTError.h"
1.58 frystyk 76: #include "HTReqMan.h"
1.60 frystyk 77: #include "HTNetMan.h"
1.63 frystyk 78: #include "HTFTPDir.h"
1.22 frystyk 79: #include "HTFTP.h" /* Implemented here */
80:
81: /* Macros and other defines */
1.60 frystyk 82: #if 0
83: /* Only use this if ABSOLUTELY necessary! */
84: #define POLL_PORTS /* If allocation does not work, poll ourselves.*/
1.1 timbl 85: #endif
86:
87: #ifdef POLL_PORTS
1.23 frystyk 88: #define FIRST_TCP_PORT 1024 /* Region to try for a listening port */
89: #define LAST_TCP_PORT 5999
1.60 frystyk 90: PRIVATE int DataPort = FIRST_TCP_PORT;
1.1 timbl 91: #endif
92:
1.60 frystyk 93: #ifndef FTP_PORT
94: #define FTP_PORT 21
95: #define FTP_DATA 20
1.1 timbl 96: #endif
1.60 frystyk 97:
98: #define WWW_FTP_CLIENT "libwww@" /* If can't get user-info, use this */
99: #define FTP_DIR(me) ((me)->type=='L' || (me)->type=='N')
1.1 timbl 100:
1.58 frystyk 101: /*
102: ** Local context structure used in the HTNet object.
103: */
1.45 frystyk 104: typedef enum _HTFTPState {
1.60 frystyk 105: FTP_SUCCESS = -2,
106: FTP_ERROR = -1,
1.58 frystyk 107: FTP_BEGIN = 0,
108: FTP_NEED_CCON, /* Control connection */
1.60 frystyk 109: FTP_NEED_LOGIN,
1.58 frystyk 110: FTP_NEED_DCON, /* Data connection */
1.60 frystyk 111: FTP_NEED_DATA,
112: FTP_NEED_SERVER /* For directory listings */
1.39 frystyk 113: } HTFTPState;
114:
1.58 frystyk 115: typedef struct _ftp_ctrl {
1.60 frystyk 116: HTChunk * cmd;
117: int repcode;
118: char * reply;
119: char * uid;
1.58 frystyk 120: char * passwd;
1.60 frystyk 121: char * account;
1.58 frystyk 122: HTFTPState state; /* State of the connection */
1.60 frystyk 123: int substate; /* For hierarchical states */
124: BOOL sent; /* Read or write command */
125: BOOL cwd; /* Done cwd */
126: BOOL reset; /* Expect greeting */
1.63 frystyk 127: FTPServerType server; /* Type of server */
1.60 frystyk 128: HTNet * dnet; /* Data connection */
1.58 frystyk 129: } ftp_ctrl;
1.39 frystyk 130:
1.58 frystyk 131: typedef struct _ftp_data {
1.60 frystyk 132: char host[30]; /* Host to contact for data */
133: char * file; /* File or dir name */
134: char * offset; /* offset into file */
135: BOOL pasv; /* Active or passive */
136: char type; /* 'A', 'I', 'L'(IST), 'N'(LST) */
1.63 frystyk 137: BOOL ready; /* True if either ctrl or data is HT_LOADED */
1.76 ! frystyk 138: BOOL stream_error;
1.58 frystyk 139: } ftp_data;
1.39 frystyk 140:
1.60 frystyk 141: struct _HTStream {
142: CONST HTStreamClass * isa;
143: HTStream * target;
144: HTRequest * request;
145: ftp_ctrl * ctrl;
146: HTSocketEOL state;
147: HTChunk * welcome;
1.62 frystyk 148: BOOL junk; /* For too long lines */
1.60 frystyk 149: BOOL first_line;
1.63 frystyk 150: char buffer[MAX_FTP_LINE+1];
1.60 frystyk 151: int buflen;
152: };
153:
154: typedef enum _FTPDataCon {
155: FTP_DATA_PASV = 0x1,
156: FTP_DATA_PORT = 0x2
157: } FTPDataCon;
158:
159: PRIVATE FTPDataCon FTPMode = FTP_DATA_PASV;
1.39 frystyk 160:
1.23 frystyk 161: /* ------------------------------------------------------------------------- */
1.60 frystyk 162: /* FTP Status Line Stream */
1.22 frystyk 163: /* ------------------------------------------------------------------------- */
1.60 frystyk 164:
165: /* FTPCleanup
166: ** ----------
167: ** This function closes the connection and frees memory.
168: ** Returns YES on OK, else NO
169: */
1.65 frystyk 170: PRIVATE int FTPCleanup (HTRequest * request, int status)
1.60 frystyk 171: {
1.75 frystyk 172: if (request) {
173: HTNet * cnet = request->net;
174: ftp_ctrl * ctrl;
175:
176: /* Free stream with data TO network */
177: if (!HTRequest_isDestination(request) && request->input_stream) {
178: if (status == HT_INTERRUPTED)
179: (*request->input_stream->isa->abort)(request->input_stream,NULL);
180: else
181: (*request->input_stream->isa->_free)(request->input_stream);
182: }
183:
184: /* Remove the request object and our own context structure for http */
185: if (cnet && (ctrl = (ftp_ctrl *) cnet->context) != NULL) {
186: HTNet * dnet = ctrl->dnet;
187: ftp_data * data;
188: HTChunk_delete(ctrl->cmd);
189: FREE(ctrl->reply);
190: FREE(ctrl->uid);
191: FREE(ctrl->passwd);
192: FREE(ctrl->account);
193: FREE(ctrl);
194: if (dnet && (data = (ftp_data *) dnet->context) != NULL) {
195: FREE(data->file);
196: FREE(data);
197: }
198: HTNet_delete(dnet, HT_IGNORE);
199: }
200: HTNet_delete(cnet, status);
201: return YES;
1.60 frystyk 202: }
1.75 frystyk 203: return NO;
1.60 frystyk 204: }
205:
206: /* ScanResponse
207: ** ------------
208: ** Analyzes the response from the FTP server.
209: ** Returns HT_LOADED if OK, HT_OK if more, HT_ERROR if error
210: ** the control connection.
1.33 frystyk 211: */
1.65 frystyk 212: PRIVATE int ScanResponse (HTStream * me)
1.33 frystyk 213: {
1.60 frystyk 214: int reply = 0;
215: char cont = '\0';
216: char *ptr = me->buffer+4;
217: *(me->buffer+me->buflen) = '\0';
218: if (isdigit(*(me->buffer))) sscanf(me->buffer, "%d%c", &reply, &cont);
219: if (me->first_line) {
1.67 frystyk 220: if (PROT_TRACE) TTYPrint(TDEST, "FTP Rx...... `%s\'\n", me->buffer);
1.60 frystyk 221: if (!reply) return HT_ERROR;
222: me->first_line = NO;
223: me->ctrl->repcode = reply;
224: StrAllocCopy(me->ctrl->reply, ptr);
225: } else {
1.73 frystyk 226: HTChunk_puts(me->welcome, ptr);
227: HTChunk_putc(me->welcome, '\n');
1.33 frystyk 228: }
1.60 frystyk 229: me->buflen = 0;
1.68 frystyk 230: me->state = EOL_BEGIN;
1.60 frystyk 231: if (cont != '-') {
232: me->first_line = YES;
233: return HT_LOADED;
1.33 frystyk 234: }
1.60 frystyk 235: return HT_OK;
1.33 frystyk 236: }
237:
1.60 frystyk 238: /*
239: ** Searches for FTP header line until buffer fills up or a CRLF or LF
240: ** is found
1.23 frystyk 241: */
1.60 frystyk 242: PRIVATE int FTPStatus_put_block (HTStream * me, CONST char * b, int l)
243: {
244: int status;
245: while (l-- > 0) {
246: if (me->state == EOL_FCR) {
247: if (*b == LF) {
1.62 frystyk 248: if (!me->junk) {
249: if ((status = ScanResponse(me)) != HT_OK)
250: return status;
251: } else {
252: me->buflen = 0;
253: me->junk = NO;
254: }
1.60 frystyk 255: }
256: } else if (*b == CR) {
257: me->state = EOL_FCR;
258: } else if (*b == LF) {
1.62 frystyk 259: if (!me->junk) {
260: if ((status = ScanResponse(me)) != HT_OK)
261: return status;
262: } else {
263: me->buflen = 0;
264: me->junk = NO;
265: }
1.60 frystyk 266: } else {
267: *(me->buffer+me->buflen++) = *b;
1.63 frystyk 268: if (me->buflen >= MAX_FTP_LINE) {
1.60 frystyk 269: if (PROT_TRACE)
1.67 frystyk 270: TTYPrint(TDEST, "FTP Status.. Line too long - chopped\n");
1.62 frystyk 271: me->junk = YES;
272: if ((status = ScanResponse(me)) != HT_OK) {
273: me->junk = NO;
274: return status;
275: }
1.23 frystyk 276: }
277: }
1.60 frystyk 278: b++;
1.25 frystyk 279: }
1.60 frystyk 280: return HT_OK;
1.25 frystyk 281: }
282:
1.65 frystyk 283: PRIVATE int FTPStatus_put_string (HTStream * me, CONST char * s)
1.60 frystyk 284: {
285: return FTPStatus_put_block(me, s, (int) strlen(s));
286: }
1.25 frystyk 287:
1.65 frystyk 288: PRIVATE int FTPStatus_put_character (HTStream * me, char c)
1.25 frystyk 289: {
1.60 frystyk 290: return FTPStatus_put_block(me, &c, 1);
291: }
1.25 frystyk 292:
1.65 frystyk 293: PRIVATE int FTPStatus_flush (HTStream * me)
1.60 frystyk 294: {
295: return (*me->target->isa->flush)(me->target);
1.23 frystyk 296: }
1.22 frystyk 297:
1.65 frystyk 298: PRIVATE int FTPStatus_free (HTStream * me)
1.22 frystyk 299: {
1.60 frystyk 300: int status = HT_OK;
301: if (me->target) {
302: if ((status = (*me->target->isa->_free)(me->target)) == HT_WOULD_BLOCK)
303: return HT_WOULD_BLOCK;
1.22 frystyk 304: }
1.73 frystyk 305: HTChunk_delete(me->welcome);
1.60 frystyk 306: free(me);
307: return HT_OK;
1.22 frystyk 308: }
309:
1.68 frystyk 310: PRIVATE int FTPStatus_abort (HTStream * me, HTList * e)
1.22 frystyk 311: {
1.60 frystyk 312: if (me->target)
313: (*me->target->isa->abort)(me->target, e);
1.73 frystyk 314: HTChunk_delete(me->welcome);
1.60 frystyk 315: free(me);
316: if (PROT_TRACE)
1.67 frystyk 317: TTYPrint(TDEST, "FTPStatus... ABORTING...\n");
1.60 frystyk 318: return HT_ERROR;
1.22 frystyk 319: }
320:
1.60 frystyk 321: /* FTPStatus Stream
322: ** -----------------
1.22 frystyk 323: */
1.60 frystyk 324: PRIVATE CONST HTStreamClass FTPStatusClass =
325: {
326: "FTPStatus",
327: FTPStatus_flush,
328: FTPStatus_free,
329: FTPStatus_abort,
330: FTPStatus_put_character,
331: FTPStatus_put_string,
332: FTPStatus_put_block
333: };
334:
1.65 frystyk 335: PRIVATE HTStream * FTPStatus_new (HTRequest * request, ftp_ctrl * ctrl)
1.60 frystyk 336: {
337: HTStream * me = (HTStream *) calloc(1, sizeof(HTStream));
338: if (!me) outofmem(__FILE__, "FTPStatus_new");
339: me->isa = &FTPStatusClass;
340: me->request = request;
341: me->first_line = YES;
1.73 frystyk 342: me->welcome = HTChunk_new(256);
1.60 frystyk 343: me->ctrl = ctrl;
344: me->state = EOL_BEGIN;
345: return me;
1.22 frystyk 346: }
347:
1.60 frystyk 348: /* ------------------------------------------------------------------------- */
349: /* FTP Client Functions for managing control and data connections */
350: /* ------------------------------------------------------------------------- */
1.22 frystyk 351:
1.60 frystyk 352: PRIVATE int SendCommand (HTRequest *request, ftp_ctrl *ctrl,
353: char *token, char *pars)
354: {
355: int len = strlen(token) + (pars ? strlen(pars)+1:0) + 2;
1.73 frystyk 356: HTChunk_clear(ctrl->cmd);
357: HTChunk_ensure(ctrl->cmd, len);
1.60 frystyk 358: if (pars && *pars)
1.73 frystyk 359: sprintf(HTChunk_data(ctrl->cmd), "%s %s%c%c", token, pars, CR, LF);
1.60 frystyk 360: else
1.73 frystyk 361: sprintf(HTChunk_data(ctrl->cmd), "%s%c%c", token, CR, LF);
362: if (PROT_TRACE) TTYPrint(TDEST, "FTP Tx...... %s", HTChunk_data(ctrl->cmd));
1.60 frystyk 363: return (*request->input_stream->isa->put_block)
1.73 frystyk 364: (request->input_stream, HTChunk_data(ctrl->cmd), len);
1.60 frystyk 365: }
366:
367: /* HTFTPParseURL
368: ** -------------
369: ** Scan URL for uid and passwd, and any data type indication. The
370: ** expected format is [user[:password]@]host[:port].
371: ** If no values are found then use defaults.
372: ** Returns YES if OK, else NO
1.22 frystyk 373: */
1.60 frystyk 374: PRIVATE BOOL HTFTPParseURL (char *url, ftp_ctrl *ctrl, ftp_data *data)
1.22 frystyk 375: {
1.60 frystyk 376: char *login = HTParse(url, "", PARSE_HOST);
377: char *path = HTParse(url, "", PARSE_PATH+PARSE_PUNCTUATION);
378: char *ptr = strchr(login, '@');
379: if (ptr) { /* Uid and/or passwd specified */
380: char *passwd;
381: *ptr = '\0';
382: if ((passwd = strchr(login, ':'))) { /* Passwd specified */
383: *passwd++ = '\0';
384: HTUnEscape(passwd);
385: StrAllocCopy(ctrl->passwd, passwd);
1.22 frystyk 386: }
1.60 frystyk 387: HTUnEscape(login);
388: StrAllocCopy(ctrl->uid, login);
389: } else { /* Use anonymous */
390: CONST char *mailaddress = HTGetMailAddress();
391: StrAllocCopy(ctrl->uid, "anonymous");
392: if (mailaddress)
393: StrAllocCopy(ctrl->passwd, mailaddress);
394: else
395: StrAllocCopy(ctrl->passwd, WWW_FTP_CLIENT);
1.22 frystyk 396: }
1.66 frystyk 397: if (PROT_TRACE)
1.67 frystyk 398: TTYPrint(TDEST, "FTPParse.... uid `%s\' pw `%s\'\n",
1.66 frystyk 399: ctrl->uid ? ctrl->uid : "<null>",
400: ctrl->passwd ? ctrl->passwd : "<null>");
1.60 frystyk 401:
402: ptr = strchr(path, ';');
403: if (ptr) {
404: *ptr = '\0';
405: if (strncasecomp(ptr, ";type=", 6)) /* Look for type */
406: data->type = TOUPPER(*(ptr+6));
407: else if (*(ptr-1) == '/')
408: data->type = 'N';
409: } else if (*(path+strlen(path)-1) == '/') {
410: *(path+strlen(path)-1) = '\0';
411: data->type = 'N';
412: }
413: if (data->type && PROT_TRACE)
1.67 frystyk 414: TTYPrint(TDEST, "FTPParse.... Datatype %c\n", data->type);
1.60 frystyk 415: StrAllocCopy(data->file, path);
416: data->offset = data->file;
417: free(login);
418: free(path);
419: return YES;
1.22 frystyk 420: }
421:
1.60 frystyk 422: /* Use LIST or NLST
423: ** ----------------
424: ** This function sets the type field for what type of list we can use
425: ** Returns YES if OK, else NO
426: */
1.63 frystyk 427: PRIVATE BOOL FTPListType (ftp_data * data, FTPServerType type)
1.60 frystyk 428: {
429: if (!data) return NO;
430: switch (type) {
431: case FTP_GENERIC: data->type='N'; break;
432: case FTP_MACHTEN: data->type='L'; break;
433: case FTP_UNIX: data->type='L'; break;
434: case FTP_VMS: data->type='L'; break;
435: case FTP_CMS: data->type='N'; break;
436: case FTP_DCTS: data->type='N'; break;
437: case FTP_TCPC: data->type='N'; break;
438: case FTP_PETER_LEWIS: data->type='L'; break;
439: case FTP_NCSA: data->type='N'; break;
440: case FTP_WINNT: data->type='L'; break;
441: default: data->type='N'; break;
442: }
443: return YES;
444: }
445:
446: /* Open a Data socket for listening on
447: ** -----------------------------------
448: ** Set up a port to listen for data
449: ** Returns YES if OK, else NO
1.22 frystyk 450: */
1.60 frystyk 451: PRIVATE BOOL ListenSocket (HTNet *cnet, HTNet *dnet, ftp_data *data)
1.22 frystyk 452: {
1.60 frystyk 453: #ifdef POLL_PORTS
454: unsigned short old_DataPort = DataPort;
455: for (DataPort=old_DataPort+1;; DataPort++) {
456: if (DataPort > LAST_TCP_PORT)
457: DataPort = FIRST_TCP_PORT;
458: if (DataPort == old_DataPort) {
1.71 frystyk 459: if(PROT_TRACE) TTYPrint(TDEST,"FTP......... No data port found\n");
1.60 frystyk 460: return NO;
461: }
1.71 frystyk 462: if (HTDoListen(dnet, DataPort, 1) == HT_OK)
1.60 frystyk 463: break;
464: if (dnet->sockfd != INVSOC) {
465: NETCLOSE(dnet->sockfd);
466: dnet->sockfd = INVSOC:
467: }
1.22 frystyk 468: }
1.60 frystyk 469: #else
1.71 frystyk 470: if (HTDoListen(dnet, 0, cnet->sockfd, 1) != HT_OK) return NO;
1.60 frystyk 471: #endif /* POLL_PORTS */
1.22 frystyk 472:
1.60 frystyk 473: /* Now we must find out who we are to tell the other guy */
474: {
475: SockA local_addr;
476: int addr_size = sizeof(local_addr);
477: memset((void *) &local_addr, '\0', sizeof(local_addr));
478: if (getsockname(dnet->sockfd, (struct sockaddr *) &local_addr,
479: &addr_size) < 0) {
1.68 frystyk 480: HTRequest_addSystemError(dnet->request, ERR_FATAL, socerrno,
481: NO, "getsockname");
1.60 frystyk 482: return NO;
1.22 frystyk 483: }
1.67 frystyk 484: if (PROT_TRACE) TTYPrint(TDEST, "FTP......... This host is `%s\'\n",
1.60 frystyk 485: HTInetString(&local_addr));
486: {
487: u_long addr = local_addr.sin_addr.s_addr;
488: u_short port = local_addr.sin_port;
489: sprintf(data->host, "%d,%d,%d,%d,%d,%d",
490: (int)*((unsigned char *)(&addr)+0),
491: (int)*((unsigned char *)(&addr)+1),
492: (int)*((unsigned char *)(&addr)+2),
493: (int)*((unsigned char *)(&addr)+3),
494: (int)*((unsigned char *)(&port)+0),
495: (int)*((unsigned char *)(&port)+1));
1.22 frystyk 496: }
497: }
1.60 frystyk 498: return YES;
1.22 frystyk 499: }
500:
1.60 frystyk 501: /* HTFTPLogin
502: ** -----------
503: ** This function makes a login to a ftp-server. It takes the user name
504: ** and passwd specified in ctrl->user and if that fails or an additional
505: ** account is needed, the user is prompted.
506: ** Returns HT_OK, HT_ERROR, or HT_WOULD_BLOCK
1.22 frystyk 507: */
1.60 frystyk 508: PRIVATE int HTFTPLogin (HTRequest *request, HTNet *cnet, ftp_ctrl *ctrl)
1.22 frystyk 509: {
1.60 frystyk 510: int status;
511: typedef enum _state {
512: SUB_ERROR = -2,
513: SUB_SUCCESS = -1,
514: NEED_SELECT = 0,
515: NEED_GREETING,
516: NEED_REIN,
517: NEED_UID,
518: NEED_PASSWD,
519: NEED_ACCOUNT,
520: PROMPT_USER
521: } state;
522:
523: /* Jump into a second level state machine */
524: while (1) {
525: switch ((state) ctrl->substate) {
526: case NEED_SELECT:
527: ctrl->substate = ctrl->reset ? NEED_REIN : NEED_GREETING;
528: break;
529:
530: case NEED_GREETING:
531: status = HTSocketRead(request, cnet);
532: if (status == HT_WOULD_BLOCK)
533: return HT_WOULD_BLOCK;
534: else if (status == HT_LOADED) {
1.66 frystyk 535: if (ctrl->repcode/100 == 2) {
536: ctrl->substate = (ctrl->uid && *ctrl->uid) ?
537: NEED_UID : PROMPT_USER;
538: } else
1.60 frystyk 539: ctrl->substate = SUB_ERROR;
540: } else
541: ctrl->substate = SUB_ERROR;
542: break;
543:
544: case NEED_REIN:
545: if (!ctrl->sent) {
546: status = SendCommand(request, ctrl, "REIN", NULL);
547: if (status == HT_WOULD_BLOCK)
548: return HT_WOULD_BLOCK;
549: else if (status == HT_ERROR)
550: ctrl->substate = SUB_ERROR;
551: ctrl->sent = YES;
552: } else {
553: status = HTSocketRead(request, cnet);
554: if (status == HT_WOULD_BLOCK)
555: return HT_WOULD_BLOCK;
556: else if (status == HT_LOADED) {
1.66 frystyk 557: if (ctrl->repcode/100 == 2) {
558: ctrl->substate = (ctrl->uid && *ctrl->uid) ?
559: NEED_UID : PROMPT_USER;
560: } else
1.60 frystyk 561: ctrl->substate = SUB_SUCCESS; /* hope the best */
562: } else
563: ctrl->substate = SUB_ERROR;
564: ctrl->sent = NO;
1.22 frystyk 565: }
1.60 frystyk 566: break;
567:
568: case NEED_UID:
569: if (!ctrl->sent) {
570: status = SendCommand(request, ctrl, "USER", ctrl->uid);
571: if (status == HT_WOULD_BLOCK)
572: return HT_WOULD_BLOCK;
573: else if (status == HT_ERROR)
574: ctrl->substate = SUB_ERROR;
575: ctrl->sent = YES;
1.22 frystyk 576: } else {
1.60 frystyk 577: status = HTSocketRead(request, cnet);
578: if (status == HT_WOULD_BLOCK)
579: return HT_WOULD_BLOCK;
580: else if (status == HT_LOADED) {
581: int code = ctrl->repcode/100;
582: if (code == 2) /* Logged in w/o passwd! */
583: ctrl->substate = SUB_SUCCESS;
1.66 frystyk 584: else if (code == 3) { /* Password demanded */
585: ctrl->substate = (ctrl->passwd && *ctrl->passwd) ?
586: NEED_PASSWD : PROMPT_USER;
587: } else if (ctrl->repcode == 530)
1.60 frystyk 588: ctrl->substate = PROMPT_USER; /* User unknown */
589: else
590: ctrl->substate = SUB_ERROR;
591: } else
592: ctrl->substate = SUB_ERROR;
593: ctrl->sent = NO;
1.22 frystyk 594: }
1.60 frystyk 595: break;
1.1 timbl 596:
1.60 frystyk 597: case NEED_PASSWD:
598: if (!ctrl->sent) {
599: status = SendCommand(request, ctrl, "PASS", ctrl->passwd);
600: if (status == HT_WOULD_BLOCK)
601: return HT_WOULD_BLOCK;
602: else if (status == HT_ERROR)
603: ctrl->substate = SUB_ERROR;
604: ctrl->sent = YES;
605: } else {
606: status = HTSocketRead(request, cnet);
607: if (status == HT_WOULD_BLOCK)
608: return HT_WOULD_BLOCK;
609: else if (status == HT_LOADED) {
610: int code = ctrl->repcode/100;
611: if (code == 2) /* Logged in with passwd */
612: ctrl->substate = SUB_SUCCESS;
1.70 frystyk 613: else if (code == 3) { /* Account required */
614: HTAlertCallback *cbf = HTAlert_find(HT_A_PROMPT);
615: HTAlertPar * reply = HTAlert_newReply();
616: if (cbf && (*cbf)(request, HT_A_PROMPT,
617: HT_MSG_ACCOUNT, NULL, NULL, reply)) {
618: ctrl->account = HTAlert_replyMessage(reply);
1.60 frystyk 619: ctrl->substate = NEED_ACCOUNT;
1.70 frystyk 620: } else
1.60 frystyk 621: ctrl->substate = SUB_ERROR;
1.70 frystyk 622: HTAlert_deleteReply(reply);
1.60 frystyk 623: } else if (ctrl->repcode == 530)
624: ctrl->substate = PROMPT_USER;
625: else
626: ctrl->substate = SUB_ERROR;
627: } else
628: ctrl->substate = SUB_ERROR;
629: ctrl->sent = NO;
630: }
631: break;
1.1 timbl 632:
1.60 frystyk 633: case NEED_ACCOUNT:
634: if (!ctrl->sent) {
635: status = SendCommand(request, ctrl, "ACCT", ctrl->account);
636: if (status == HT_WOULD_BLOCK)
637: return HT_WOULD_BLOCK;
638: else if (status == HT_ERROR)
639: ctrl->substate = SUB_ERROR;
640: ctrl->sent = YES;
1.23 frystyk 641: } else {
1.60 frystyk 642: status = HTSocketRead(request, cnet);
643: if (status == HT_WOULD_BLOCK)
644: return HT_WOULD_BLOCK;
645: else if (status == HT_LOADED) {
646: int code = ctrl->repcode/100;
647: if (code == 2) /* Logged in with account */
648: ctrl->substate = SUB_SUCCESS;
649: else
650: ctrl->substate = SUB_ERROR; /* hopeless */
651: } else
652: ctrl->substate = SUB_ERROR;
653: ctrl->sent = NO;
1.1 timbl 654: }
1.60 frystyk 655: break;
1.1 timbl 656:
1.60 frystyk 657: case PROMPT_USER:
658: {
1.70 frystyk 659: HTAlertCallback *cbf = HTAlert_find(HT_A_USER_PW);
660: HTAlertPar * reply = HTAlert_newReply();
1.60 frystyk 661: FREE(ctrl->uid);
662: FREE(ctrl->passwd);
1.70 frystyk 663: if (cbf &&
664: (*cbf)(request, HT_A_USER_PW,HT_MSG_NULL,NULL,NULL,reply)){
665: ctrl->uid = HTAlert_replyMessage(reply);
666: ctrl->passwd = HTAlert_replySecret(reply);
667: }
668: HTAlert_deleteReply(reply);
1.66 frystyk 669: if (ctrl->uid && *ctrl->uid && ctrl->passwd && *ctrl->passwd)
1.60 frystyk 670: ctrl->substate = NEED_UID;
671: else
672: ctrl->substate = SUB_ERROR;
673: }
674: break;
1.1 timbl 675:
1.60 frystyk 676: case SUB_ERROR:
677: if (PROT_TRACE)
1.67 frystyk 678: TTYPrint(TDEST, "FTP......... Login failed\n");
1.60 frystyk 679: ctrl->substate = 0;
680: return HT_ERROR;
681: break;
1.23 frystyk 682:
1.60 frystyk 683: case SUB_SUCCESS:
1.43 frystyk 684: if (PROT_TRACE)
1.67 frystyk 685: TTYPrint(TDEST, "FTP......... Logged in as `%s\'\n", ctrl->uid);
1.60 frystyk 686: ctrl->substate = 0;
687: return HT_OK;
688: break;
1.23 frystyk 689: }
1.22 frystyk 690: }
691: }
692:
1.60 frystyk 693: /* HTFTPDataConnection
694: ** -------------------
695: ** Prepares a data connection to the server and initializes the
696: ** transfer mode.
697: ** Returns HT_OK, HT_ERROR, or HT_WOULD_BLOCK
1.1 timbl 698: */
1.60 frystyk 699: PRIVATE int HTFTPDataConnection (HTRequest * request, HTNet *cnet,
700: ftp_ctrl *ctrl, ftp_data *data)
1.1 timbl 701: {
1.60 frystyk 702: int status;
703: HTNet *dnet = ctrl->dnet;
704: typedef enum _state {
705: SUB_ERROR = -2,
706: SUB_SUCCESS = -1,
707: NEED_TYPE = 0,
708: NEED_SELECT,
709: NEED_PASV,
710: NEED_PORT
711: } state;
712:
713: /* Jump into a second level state machine */
714: while (1) {
715: switch ((state) ctrl->substate) {
716: case NEED_TYPE:
717: if(!data->type|| data->pasv || data->type=='N' || data->type=='L'){
718: ctrl->substate = NEED_SELECT;
719: break;
720: }
721: if (!ctrl->sent) {
722: char type[2];
723: *type = data->type;
724: *(type+1) = '\0';
725: status = SendCommand(request, ctrl, "TYPE", type);
726: if (status == HT_WOULD_BLOCK)
727: return HT_WOULD_BLOCK;
728: else if (status == HT_ERROR)
729: ctrl->substate = SUB_ERROR;
730: ctrl->sent = YES;
731: } else {
732: status = HTSocketRead(request, cnet);
733: if (status == HT_WOULD_BLOCK)
734: return HT_WOULD_BLOCK;
735: else if (status == HT_LOADED) {
736: if (ctrl->repcode/100 == 2)
737: ctrl->substate = NEED_SELECT;
738: else
739: ctrl->substate = SUB_ERROR;
740: } else
741: ctrl->substate = SUB_ERROR;
742: ctrl->sent = NO;
743: }
744: break;
745:
746: case NEED_SELECT:
747: if (FTPMode & FTP_DATA_PASV && !data->pasv)
748: ctrl->substate = NEED_PASV;
749: else if (ListenSocket(cnet, dnet, data))
750: ctrl->substate = NEED_PORT;
751: else
752: ctrl->substate = SUB_ERROR;
753: break;
754:
755: case NEED_PASV:
756: if (!ctrl->sent) {
757: status = SendCommand(request, ctrl, "PASV", NULL);
758: if (status == HT_WOULD_BLOCK)
759: return HT_WOULD_BLOCK;
760: else if (status == HT_ERROR)
761: ctrl->substate = SUB_ERROR;
762: ctrl->sent = YES;
763: } else {
764: status = HTSocketRead(request, cnet);
765: if (status == HT_WOULD_BLOCK)
766: return HT_WOULD_BLOCK;
767: else if (status == HT_LOADED) {
768: if (ctrl->repcode == 227) {
769: /*
770: ** If succes, we have to scan for the returned number.
771: ** As the format for the response isn't standard,
772: ** the best thing to do is to scan for the first digit
773: ** after the status code, see RFC1123
774: */
775: char *host = ctrl->reply;
776: int h0, h1, h2, h3, p0=0, p1=0;
777: while (*host && !isdigit(*host++));
778: if (!*host || sscanf(--host, "%d,%d,%d,%d,%d,%d",
779: &h0,&h1,&h2,&h3,&p0,&p1) < 6) {
780: if (PROT_TRACE)
1.67 frystyk 781: TTYPrint(TDEST, "FTP......... PASV No addr\n");
1.60 frystyk 782: ctrl->substate = SUB_ERROR;
783: break;
784: } else {
785: int port = (p0<<8)+p1;
786: sprintf(data->host, "ftp://%d.%d.%d.%d:%d/",
787: h0, h1, h2, h3, port);
788: data->pasv = YES;
789: ctrl->substate = SUB_SUCCESS;
790: }
791: } else {
792: ctrl->substate = ListenSocket(cnet, dnet, data) ?
793: NEED_PORT : SUB_ERROR;
794: }
795: } else
796: ctrl->substate = SUB_ERROR;
797: ctrl->sent = NO;
798: }
799: break;
1.22 frystyk 800:
1.60 frystyk 801: case NEED_PORT:
802: if (!ctrl->sent) {
803: status = SendCommand(request, ctrl, "PORT", data->host);
804: if (status == HT_WOULD_BLOCK)
805: return HT_WOULD_BLOCK;
806: else if (status == HT_ERROR)
807: ctrl->substate = SUB_ERROR;
808: ctrl->sent = YES;
809: } else {
810: status = HTSocketRead(request, cnet);
811: if (status == HT_WOULD_BLOCK)
812: return HT_WOULD_BLOCK;
813: else if (status == HT_LOADED) {
814: data->pasv = NO;
815: ctrl->substate = (ctrl->repcode/100 == 2) ?
816: SUB_SUCCESS : SUB_ERROR;
817: } else
818: ctrl->substate = SUB_ERROR;
819: ctrl->sent = NO;
820: }
821: break;
1.1 timbl 822:
1.60 frystyk 823: case SUB_ERROR:
824: if (PROT_TRACE)
1.67 frystyk 825: TTYPrint(TDEST, "FTP......... Can't setup data connection\n");
1.60 frystyk 826: ctrl->substate = 0;
827: return HT_ERROR;
828: break;
1.1 timbl 829:
1.60 frystyk 830: case SUB_SUCCESS:
831: if (PROT_TRACE)
1.67 frystyk 832: TTYPrint(TDEST, "FTP......... Data connection negotiated\n");
1.60 frystyk 833: ctrl->substate = 0;
834: return HT_OK;
835: break;
1.23 frystyk 836: }
1.58 frystyk 837: }
1.23 frystyk 838: }
1.1 timbl 839:
840:
1.60 frystyk 841: /* HTFTPServerInfo
842: ** ---------------
843: ** This function finds out what server we are talking to.
844: ** Maybe we can upgrade from NLST to LIST.
845: ** Returns HT_OK, HT_ERROR, or HT_WOULD_BLOCK
846: ** Thanks to James.W.Matthews@Dartmouth.EDU (James W. Matthews) for making
847: ** his code available.
1.1 timbl 848: */
1.60 frystyk 849: PRIVATE int HTFTPServerInfo (HTRequest *request, HTNet *cnet,
850: ftp_ctrl *ctrl, ftp_data *data)
1.23 frystyk 851: {
1.60 frystyk 852: int status;
853: typedef enum _state {
854: SUB_ERROR = -2,
855: SUB_SUCCESS = -1,
856: NEED_SYST = 0,
857: CHECK_SYST,
858: NEED_PWD,
859: CHECK_PWD
860: } state;
861:
862: /* Jump into a second level state machine */
863: while (1) {
864: switch ((state) ctrl->substate) {
865: case NEED_SYST:
866: if (!ctrl->sent) {
1.63 frystyk 867: if (ctrl->server != FTP_UNSURE) {
1.60 frystyk 868: FTPListType(data, ctrl->server);
869: return HT_OK;
870: }
871: status = SendCommand(request, ctrl, "SYST", NULL);
872: if (status == HT_WOULD_BLOCK)
873: return HT_WOULD_BLOCK;
874: else if (status == HT_ERROR)
875: ctrl->substate = SUB_ERROR;
876: ctrl->sent = YES;
877: } else {
878: status = HTSocketRead(request, cnet);
879: if (status == HT_WOULD_BLOCK)
880: return HT_WOULD_BLOCK;
881: else if (status == HT_LOADED) {
882: ctrl->substate=ctrl->repcode==215 ? CHECK_SYST : NEED_PWD;
883: } else
884: ctrl->substate = SUB_ERROR;
885: ctrl->sent = NO;
1.23 frystyk 886: }
887: break;
888:
1.60 frystyk 889: case CHECK_SYST:
1.23 frystyk 890: {
1.60 frystyk 891: char *reply = ctrl->reply;
892: if (!*reply) {
1.43 frystyk 893: if (PROT_TRACE)
1.67 frystyk 894: TTYPrint(TDEST, "FTP......... No server info?\n");
1.60 frystyk 895: ctrl->substate = NEED_PWD;
1.23 frystyk 896: break;
897: }
1.60 frystyk 898: if (strncmp(reply, "UNIX Type: L8MAC-OSMachTen", 28) == 0) {
899: ctrl->server = FTP_MACHTEN;
900: } else if (strstr(reply, "UNIX") != NULL) {
901: ctrl->server = FTP_UNIX;
902: } else if (strncmp(reply, "VMS", 3) == 0) {
903: ctrl->server = FTP_VMS;
904: } else if ((strncmp(reply, "VM/CMS", 6) == 0) ||
905: (strncmp(reply, "VM", 2) == 0)) {
906: ctrl->server = FTP_CMS;
907: } else if (strncmp(reply, "DCTS", 4) == 0) {
908: ctrl->server = FTP_DCTS;
909: } else if (strstr(reply, "MAC-OS TCP/ConnectII") != NULL) {
1.23 frystyk 910: /* Check old versions of TCP/C using / in pathnames */
1.63 frystyk 911: ctrl->server = FTP_TCPC + FTP_UNSURE;
1.60 frystyk 912: } else if (strncmp(reply, "MACOS Peter's Server", 20) == 0) {
913: ctrl->server = FTP_PETER_LEWIS;
914: } else if (strncmp(reply, "Windows_NT", 10) == 0) {
915: ctrl->server = FTP_WINNT;
1.23 frystyk 916: }
917:
918: /* If we are unsure, try PWD to get more information */
1.60 frystyk 919: if (ctrl->server & FTP_UNSURE)
920: ctrl->substate = NEED_PWD;
1.23 frystyk 921: else
1.60 frystyk 922: ctrl->substate = SUB_SUCCESS;
1.1 timbl 923: }
1.23 frystyk 924: break;
925:
926: case NEED_PWD:
1.60 frystyk 927: if (!ctrl->sent) {
928: status = SendCommand(request, ctrl, "PWD", NULL);
929: if (status == HT_WOULD_BLOCK)
930: return HT_WOULD_BLOCK;
931: else if (status == HT_ERROR)
932: ctrl->substate = SUB_ERROR;
933: ctrl->sent = YES;
1.23 frystyk 934: } else {
1.60 frystyk 935: status = HTSocketRead(request, cnet);
936: if (status == HT_WOULD_BLOCK)
937: return HT_WOULD_BLOCK;
938: else if (status == HT_LOADED) {
939: ctrl->substate = (ctrl->repcode/100 == 2) ?
940: CHECK_PWD : SUB_ERROR;
941: } else
942: ctrl->substate = SUB_ERROR;
943: ctrl->sent = NO;
1.23 frystyk 944: }
945: break;
946:
1.60 frystyk 947: case CHECK_PWD:
948: {
949: char *start = strchr(ctrl->reply, '"');
950: char *end;
951: if (!start || (end = strchr(++start, '"')) == NULL) {
1.43 frystyk 952: if (PROT_TRACE)
1.67 frystyk 953: TTYPrint(TDEST, "FTP......... No current directory?\n");
1.60 frystyk 954: ctrl->server = FTP_GENERIC;
1.23 frystyk 955: } else {
1.60 frystyk 956: *end = '\0';
1.63 frystyk 957: if (ctrl->server & FTP_TCPC) {
1.60 frystyk 958: ctrl->server = *start == '/' ? FTP_NCSA : FTP_TCPC;
959: } else if (*start == '/') {
960: /* path names starting with / imply Unix, right? */
961: ctrl->server = FTP_UNIX;
962: } else if (*(end-1) == ']') {
963: /* path names ending with ] imply VMS, right? */
964: ctrl->server = FTP_VMS;
965: } else
966: ctrl->server = FTP_GENERIC;
1.23 frystyk 967: }
1.60 frystyk 968: ctrl->substate = SUB_SUCCESS;
1.1 timbl 969: }
1.23 frystyk 970: break;
1.1 timbl 971:
1.60 frystyk 972: case SUB_ERROR:
973: if (PROT_TRACE)
1.67 frystyk 974: TTYPrint(TDEST, "FTP......... Can't get server information\n");
1.60 frystyk 975: ctrl->substate = 0;
1.63 frystyk 976: ctrl->server = FTP_GENERIC;
1.60 frystyk 977: return HT_ERROR;
1.23 frystyk 978: break;
1.22 frystyk 979:
1.60 frystyk 980: case SUB_SUCCESS:
1.63 frystyk 981: if (PROT_TRACE)
1.67 frystyk 982: TTYPrint(TDEST, "FTP Server.. Guessed type %d\n", ctrl->server);
1.60 frystyk 983: HTDNS_setServerVersion(cnet->dns, ctrl->server);
984: FTPListType(data, ctrl->server);
985: ctrl->substate = 0;
986: return HT_OK;
1.23 frystyk 987: break;
1.22 frystyk 988: }
1.23 frystyk 989: }
990: }
991:
1.60 frystyk 992: /* HTFTPGetData
993: ** ------------
994: ** This function asks for the file or a directory. First we try in one go,
1.23 frystyk 995: ** but if that doesn't work, then we use CWD for each segment and then
996: ** try to retrieve it. If that also fails, then we try if it is a
1.60 frystyk 997: ** directory.
998: ** Returns HT_OK, HT_LOADED, HT_ERROR, or HT_WOULD_BLOCK
1.23 frystyk 999: */
1.71 frystyk 1000: PRIVATE int HTFTPGetData (HTRequest *request, HTNet *cnet, SOCKET sockfd,
1.60 frystyk 1001: ftp_ctrl *ctrl, ftp_data *data)
1.23 frystyk 1002: {
1003: int status;
1.60 frystyk 1004: char *segment = NULL;
1005: HTNet *dnet = ctrl->dnet;
1006: typedef enum _state {
1007: SUB_ERROR = -2,
1008: SUB_SUCCESS = -1,
1009: NEED_SELECT = 0,
1010: NEED_CONNECT,
1011: NEED_ACCEPT,
1012: NEED_ACTION,
1013: NEED_CWD,
1014: NEED_SEGMENT,
1015: NEED_STREAM,
1.63 frystyk 1016: NEED_BODY
1.60 frystyk 1017: } state;
1018:
1019: /* Jump into a second level state machine */
1020: while (1) {
1021: switch ((state) ctrl->substate) {
1022: case NEED_SELECT:
1023: ctrl->substate = data->pasv ? NEED_CONNECT : NEED_ACTION;
1024: break;
1025:
1026: case NEED_CONNECT:
1027: status = HTDoConnect(dnet, data->host, FTP_DATA);
1028: if (status == HT_WOULD_BLOCK)
1029: return HT_WOULD_BLOCK;
1030: else if (status == HT_OK) {
1031: if (PROT_TRACE)
1.67 frystyk 1032: TTYPrint(TDEST, "FTP Data.... Active data socket %d\n",
1.60 frystyk 1033: dnet->sockfd);
1034: ctrl->substate = NEED_ACTION;
1035: } else { /* Swap to PORT on the fly */
1036: NETCLOSE(dnet->sockfd);
1037: dnet->sockfd = INVSOC;
1038: if (PROT_TRACE)
1.67 frystyk 1039: TTYPrint(TDEST, "FTP......... Swap to PORT on the fly\n");
1.60 frystyk 1040: ctrl->substate = 0;
1041: FREE(segment);
1042: return HT_OK;
1043: }
1.23 frystyk 1044: break;
1045:
1.60 frystyk 1046: case NEED_ACCEPT:
1047: {
1.72 frystyk 1048: SOCKET oldsocket = dnet->sockfd;
1049: status = HTDoAccept(dnet);
1.60 frystyk 1050: if (status == HT_WOULD_BLOCK)
1051: return HT_WOULD_BLOCK;
1052: else if (status == HT_OK) {
1053: if (PROT_TRACE)
1.72 frystyk 1054: TTYPrint(TDEST,"FTP Data.... Passive data socket %d\n",
1055: dnet->sockfd);
1056: NETCLOSE(oldsocket); /* We only accept one socket */
1.43 frystyk 1057: if (PROT_TRACE)
1.67 frystyk 1058: TTYPrint(TDEST, "FTP Data.... New data socket %d\n",
1.60 frystyk 1059: dnet->sockfd);
1060: ctrl->substate = NEED_STREAM;
1061: } else
1062: ctrl->substate = SUB_ERROR;
1.23 frystyk 1063: }
1.60 frystyk 1064: break;
1.33 frystyk 1065:
1.60 frystyk 1066: case NEED_ACTION:
1067: if (!ctrl->sent) {
1068: char *cmd = (data->type=='L') ? "LIST" :
1069: (data->type=='N') ? "NLST" : "RETR";
1070: StrAllocCopy(segment, data->offset);
1071: HTUnEscape(segment);
1072: HTCleanTelnetString(segment);
1073: status = SendCommand(request, ctrl, cmd, segment);
1.63 frystyk 1074: FREE(segment);
1.60 frystyk 1075: if (status == HT_WOULD_BLOCK)
1076: return HT_WOULD_BLOCK;
1077: else if (status == HT_ERROR)
1078: ctrl->substate = SUB_ERROR;
1079: ctrl->sent = YES;
1080: } else {
1081: status = HTSocketRead(request, cnet);
1082: if (status == HT_WOULD_BLOCK)
1083: return HT_WOULD_BLOCK;
1084: else if (status == HT_LOADED) {
1085: int code = ctrl->repcode;
1086: if (code==125 || code==150 || code==225)
1087: ctrl->substate=data->pasv ? NEED_STREAM : NEED_ACCEPT;
1088: else if (code/100==5 && !ctrl->cwd)
1089: ctrl->substate = NEED_SEGMENT;
1090: else
1091: ctrl->substate = SUB_ERROR;
1092: } else
1093: ctrl->substate = SUB_ERROR;
1094: ctrl->sent = NO;
1.23 frystyk 1095: }
1096: break;
1.60 frystyk 1097:
1098: case NEED_SEGMENT:
1.23 frystyk 1099: {
1.60 frystyk 1100: char *ptr;
1101: if (data->offset == data->file) {
1.63 frystyk 1102: if (ctrl->server == FTP_VMS) { /* Change to root */
1103: segment = (char *) malloc(strlen(ctrl->uid)+3);
1104: sprintf(segment, "[%s]", ctrl->uid);
1105: } else
1106: StrAllocCopy(segment, "/");
1.60 frystyk 1107: data->offset++;
1108: ctrl->substate = NEED_CWD;
1109: } else {
1110: if ((ptr = strchr(data->offset, '/'))) {
1111: *ptr='\0';
1112: StrAllocCopy(segment, data->offset);
1113: *ptr='/';
1114: data->offset = ++ptr;
1115: HTUnEscape(segment);
1116: HTCleanTelnetString(segment);
1117: ctrl->substate = NEED_CWD;
1.33 frystyk 1118: } else
1.60 frystyk 1119: ctrl->substate = NEED_ACTION;
1.23 frystyk 1120: }
1121: }
1122: break;
1123:
1.60 frystyk 1124: case NEED_CWD:
1125: if (!ctrl->sent) {
1126: status = SendCommand(request, ctrl, "CWD", segment);
1.63 frystyk 1127: FREE(segment);
1.60 frystyk 1128: if (status == HT_WOULD_BLOCK)
1129: return HT_WOULD_BLOCK;
1130: else if (status == HT_ERROR)
1131: ctrl->substate = SUB_ERROR;
1132: ctrl->cwd = YES;
1133: ctrl->sent = YES;
1134: } else {
1135: status = HTSocketRead(request, cnet);
1136: if (status == HT_WOULD_BLOCK)
1137: return HT_WOULD_BLOCK;
1138: else if (status == HT_LOADED) {
1139: if (ctrl->repcode/100 == 2)
1140: ctrl->substate = NEED_SEGMENT;
1141: else
1142: ctrl->substate = SUB_ERROR;
1143: } else
1144: ctrl->substate = SUB_ERROR;
1145: ctrl->sent = NO;
1.33 frystyk 1146: }
1.60 frystyk 1147: break;
1.33 frystyk 1148:
1.60 frystyk 1149: case NEED_STREAM:
1150: {
1151: dnet->isoc = HTInputSocket_new(dnet->sockfd);
1.63 frystyk 1152: if (FTP_DIR(data)) {
1.69 frystyk 1153: dnet->target=HTFTPDir_new(request,ctrl->server,data->type);
1.63 frystyk 1154: } else {
1155: dnet->target =
1156: HTStreamStack(HTAnchor_format(request->anchor),
1157: request->output_format,
1158: request->output_stream,
1159: request,YES);
1160: }
1161: sockfd = dnet->sockfd; /* Ensure that we try data first */
1.60 frystyk 1162: ctrl->substate = NEED_BODY;
1163: }
1.23 frystyk 1164: break;
1165:
1.60 frystyk 1166: case NEED_BODY:
1.63 frystyk 1167: if (sockfd == dnet->sockfd) {
1168: status = HTSocketRead(request, dnet);
1169: if (status == HT_WOULD_BLOCK)
1170: return HT_WOULD_BLOCK;
1.75 frystyk 1171: else if (status == HT_LOADED || status == HT_CLOSED) {
1.63 frystyk 1172: if (data->ready)
1173: ctrl->substate = SUB_SUCCESS;
1174: else
1175: sockfd = cnet->sockfd;
1176: data->ready = YES;
1.76 ! frystyk 1177: } else {
1.63 frystyk 1178: ctrl->substate = SUB_ERROR;
1.76 ! frystyk 1179: data->stream_error = YES;
! 1180: }
1.63 frystyk 1181: } else {
1182: status = HTSocketRead(request, cnet);
1183: if (status == HT_WOULD_BLOCK)
1184: return HT_WOULD_BLOCK;
1185: else if (status == HT_LOADED) {
1186: if (ctrl->repcode/100 == 2) {
1187: if (data->ready)
1188: ctrl->substate = SUB_SUCCESS;
1189: else
1190: sockfd = dnet->sockfd;
1191: data->ready = YES;
1192: } else
1193: ctrl->substate = SUB_ERROR;
1194: } else
1.60 frystyk 1195: ctrl->substate = SUB_ERROR;
1.63 frystyk 1196: }
1.23 frystyk 1197: break;
1.22 frystyk 1198:
1.60 frystyk 1199: case SUB_ERROR:
1200: if (PROT_TRACE)
1.67 frystyk 1201: TTYPrint(TDEST, "FTP......... Can't retrieve object\n");
1.60 frystyk 1202: ctrl->substate = 0;
1203: FREE(segment);
1204: return HT_ERROR;
1.23 frystyk 1205: break;
1206:
1.60 frystyk 1207: case SUB_SUCCESS:
1208: if (PROT_TRACE)
1.67 frystyk 1209: TTYPrint(TDEST, "FTP......... Object is loaded\n");
1.60 frystyk 1210: ctrl->substate = 0;
1211: FREE(segment);
1212: return HT_LOADED;
1.23 frystyk 1213: break;
1.1 timbl 1214: }
1215: }
1.23 frystyk 1216: }
1.1 timbl 1217:
1.23 frystyk 1218: /* ------------------------------------------------------------------------- */
1219:
1220: /* Retrieve File from Server as an atomic action.
1221: ** -----------------------------------------------
1.58 frystyk 1222: ** Given a hypertext address, this routine loads a document.
1.23 frystyk 1223: **
1224: ** On entry,
1.58 frystyk 1225: ** request This is the request structure
1226: ** returns HT_ERROR Error has occured in call back
1227: ** HT_OK Call back was OK
1228: */
1.65 frystyk 1229: PUBLIC int HTLoadFTP (SOCKET soc, HTRequest * request, SockOps ops)
1.58 frystyk 1230: {
1231: int status = HT_ERROR;
1.60 frystyk 1232: HTNet *cnet = request->net;
1.58 frystyk 1233: ftp_ctrl *ctrl;
1.60 frystyk 1234: ftp_data *data;
1.58 frystyk 1235: char *url = HTAnchor_physical(request->anchor);
1.23 frystyk 1236:
1.58 frystyk 1237: /*
1.60 frystyk 1238: ** Initiate a new FTP ctrl and data structure and bind to request structure
1.58 frystyk 1239: ** This is actually state FTP_BEGIN, but it can't be in the state
1240: ** machine as we need the structure first.
1241: */
1242: if (ops == FD_NONE) {
1.67 frystyk 1243: if (PROT_TRACE) TTYPrint(TDEST, "FTP......... Looking for `%s\'\n",url);
1.60 frystyk 1244: if ((ctrl = (ftp_ctrl *) calloc(1, sizeof(ftp_ctrl))) == NULL ||
1245: (data = (ftp_data *) calloc(1, sizeof(ftp_data))) == NULL)
1.58 frystyk 1246: outofmem(__FILE__, "HTLoadFTP");
1.73 frystyk 1247: ctrl->cmd = HTChunk_new(128);
1.58 frystyk 1248: ctrl->state = FTP_BEGIN;
1.60 frystyk 1249: ctrl->server = FTP_UNSURE;
1.74 frystyk 1250: ctrl->dnet = HTNet_dup(cnet);
1.60 frystyk 1251: cnet->context = ctrl; /* Context for control connection */
1252: ctrl->dnet->context = data; /* Context for data connection */
1253: } else if (ops == FD_CLOSE) { /* Interrupted */
1254: if(HTRequest_isPostWeb(request)&&!HTRequest_isMainDestination(request))
1255: FTPCleanup(request, HT_IGNORE);
1256: else
1257: FTPCleanup(request, HT_INTERRUPTED);
1258: return HT_OK;
1259: } else {
1260: ctrl = (ftp_ctrl *) cnet->context; /* Get existing copy */
1261: data = (ftp_data *) ctrl->dnet->context;
1262: }
1.58 frystyk 1263:
1264: /* Now jump into the machine. We know the state from the previous run */
1265: while (1) {
1266: switch (ctrl->state) {
1.60 frystyk 1267: case FTP_BEGIN:
1268: HTFTPParseURL(url, ctrl, data);
1269: if (data->type != 'N') {
1270: HTBind_getBindings(request->anchor);
1271: if (HTAnchor_encoding(request->anchor) != HTAtom_for("7bit"))
1272: data->type = 'I';
1273: }
1274: ctrl->state = FTP_NEED_CCON;
1275: break;
1276:
1277: case FTP_NEED_CCON:
1278: status = HTDoConnect(cnet, url, FTP_PORT);
1279: if (status == HT_OK) {
1280: char *s_class = HTDNS_serverClass(cnet->dns);
1281: if (s_class && strcasecomp(s_class, "ftp")) {
1.68 frystyk 1282: HTRequest_addError(request, ERR_FATAL, NO, HTERR_CLASS,
1283: NULL, 0, "HTLoadFTP");
1.60 frystyk 1284: ctrl->state = FTP_ERROR;
1285: break;
1286: }
1287: HTDNS_setServerClass(cnet->dns, "ftp");
1.63 frystyk 1288: if (HTDNS_socket(cnet->dns) != INVSOC) {
1289: ctrl->server = HTDNS_serverVersion(cnet->dns);
1290: if (PROT_TRACE)
1.67 frystyk 1291: TTYPrint(TDEST, "FTP Server.. We know from cache that this is a type %d server\n",
1.63 frystyk 1292: ctrl->server);
1.60 frystyk 1293: ctrl->reset = 1;
1.63 frystyk 1294: } else
1.60 frystyk 1295: HTDNS_setSocket(cnet->dns, cnet->sockfd);
1296: if (PROT_TRACE)
1.67 frystyk 1297: TTYPrint(TDEST, "FTP Ctrl.... Connected, socket %d\n",
1.60 frystyk 1298: cnet->sockfd);
1.23 frystyk 1299:
1.60 frystyk 1300: /* Set up stream TO network */
1301: request->input_stream = HTWriter_new(cnet, YES);
1.23 frystyk 1302:
1.60 frystyk 1303: /*
1304: ** Set up concurrent read/write if this request isn't the
1305: ** source for a PUT or POST. As source we don't start reading
1306: ** before all destinations are ready. If destination then
1307: ** register the input stream and get ready for read
1308: */
1309: if (HTRequest_isPostWeb(request)) {
1310: HTEvent_Register(cnet->sockfd, request, (SockOps) FD_READ,
1311: HTLoadFTP, cnet->priority);
1312: HTRequest_linkDestination(request);
1313: }
1314:
1315: /* Set up stream FROM network and corresponding read buffer */
1316: cnet->isoc = HTInputSocket_new(cnet->sockfd);
1317: cnet->target = FTPStatus_new(request, ctrl);
1318: ctrl->state = FTP_NEED_LOGIN;
1319: } else if (status == HT_WOULD_BLOCK || status == HT_PERSISTENT)
1320: return HT_OK;
1321: else
1322: ctrl->state = FTP_ERROR; /* Error or interrupt */
1323: break;
1324:
1325: case FTP_NEED_LOGIN:
1326: status = HTFTPLogin(request, cnet, ctrl);
1327: if (status == HT_WOULD_BLOCK) return HT_OK;
1328: ctrl->state = (status == HT_OK) ? FTP_NEED_DCON : FTP_ERROR;
1329: break;
1330:
1331: case FTP_NEED_DCON:
1332: status = HTFTPDataConnection(request, cnet, ctrl, data);
1333: if (status == HT_WOULD_BLOCK) return HT_OK;
1334: if (status == HT_OK)
1335: ctrl->state = (data->type=='N') ?
1336: FTP_NEED_SERVER : FTP_NEED_DATA;
1337: else
1338: ctrl->state = FTP_ERROR;
1339: break;
1340:
1341: case FTP_NEED_DATA:
1.63 frystyk 1342: status = HTFTPGetData(request, cnet, soc, ctrl, data);
1.60 frystyk 1343: if (status == HT_WOULD_BLOCK) return HT_OK;
1344: if (status == HT_LOADED)
1345: ctrl->state = FTP_SUCCESS;
1346: else if (status == HT_OK)
1347: ctrl->state = FTP_NEED_DCON;
1.76 ! frystyk 1348: else if (!FTP_DIR(data) && !data->stream_error) {
1.60 frystyk 1349: FTPListType(data, ctrl->server);
1350: ctrl->state = FTP_NEED_SERVER; /* Try a dir instead? */
1351: } else
1352: ctrl->state = FTP_ERROR;
1353: break;
1.23 frystyk 1354:
1.60 frystyk 1355: case FTP_NEED_SERVER:
1356: status = HTFTPServerInfo(request, cnet, ctrl, data);
1357: if (status == HT_WOULD_BLOCK) return HT_OK;
1358: ctrl->state = FTP_NEED_DATA;
1359: break;
1360:
1361: case FTP_SUCCESS:
1362: if (HTRequest_isPostWeb(request)) {
1363: BOOL main = HTRequest_isMainDestination(request);
1364: if (HTRequest_isDestination(request)) {
1365: HTLink *link =
1366: HTAnchor_findLink((HTAnchor *) request->source->anchor,
1367: (HTAnchor *) request->anchor);
1.72 frystyk 1368: HTLink_setResult(link, HT_LINK_OK);
1.23 frystyk 1369: }
1.60 frystyk 1370: HTRequest_removeDestination(request);
1371: FTPCleanup(request, main ? HT_LOADED : HT_IGNORE);
1372: } else
1373: FTPCleanup(request, HT_LOADED);
1374: return HT_OK;
1375: break;
1376:
1377: case FTP_ERROR:
1378: /* Clean up the other connections or just this one */
1379: if (HTRequest_isPostWeb(request)) {
1380: BOOL main = HTRequest_isMainDestination(request);
1381: HTRequest_killPostWeb(request);
1382: if (HTRequest_isDestination(request)) {
1383: HTLink *link =
1384: HTAnchor_findLink((HTAnchor *) request->source->anchor,
1385: (HTAnchor *) request->anchor);
1.72 frystyk 1386: HTLink_setResult(link, HT_LINK_ERROR);
1.30 luotonen 1387: }
1.60 frystyk 1388: HTRequest_removeDestination(request);
1389: FTPCleanup(request, main ? HT_ERROR : HT_IGNORE);
1390: } else
1391: FTPCleanup(request, HT_ERROR);
1392: return HT_OK;
1393: break;
1.23 frystyk 1394: }
1.60 frystyk 1395: } /* End of while(1) */
1.23 frystyk 1396: }
1.22 frystyk 1397:
Webmaster
![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to HTFTP.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [Public] / libwww / Library / src