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30b30ec1 AL |
1 | // -*- mode: cpp; mode: fold -*- |
2 | // Description /*{{{*/ | |
f93d1355 | 3 | // $Id: ftp.cc,v 1.17 1999/12/09 03:45:56 jgg Exp $ |
30b30ec1 AL |
4 | /* ###################################################################### |
5 | ||
6 | HTTP Aquire Method - This is the FTP aquire method for APT. | |
7 | ||
8 | This is a very simple implementation that does not try to optimize | |
9 | at all. Commands are sent syncronously with the FTP server (as the | |
10 | rfc recommends, but it is not really necessary..) and no tricks are | |
11 | done to speed things along. | |
934b6582 AL |
12 | |
13 | RFC 2428 describes the IPv6 FTP behavior | |
14 | ||
30b30ec1 AL |
15 | ##################################################################### */ |
16 | /*}}}*/ | |
17 | // Include Files /*{{{*/ | |
18 | #include <apt-pkg/fileutl.h> | |
19 | #include <apt-pkg/acquire-method.h> | |
20 | #include <apt-pkg/error.h> | |
21 | #include <apt-pkg/md5.h> | |
30b30ec1 AL |
22 | |
23 | #include <sys/stat.h> | |
24 | #include <sys/time.h> | |
25 | #include <utime.h> | |
26 | #include <unistd.h> | |
27 | #include <signal.h> | |
28 | #include <stdio.h> | |
29 | #include <errno.h> | |
30 | #include <stdarg.h> | |
31 | ||
32 | // Internet stuff | |
33 | #include <netinet/in.h> | |
34 | #include <sys/socket.h> | |
35 | #include <arpa/inet.h> | |
36 | #include <netdb.h> | |
37 | ||
6d13bbca | 38 | #include "rfc2553emu.h" |
0837bd25 | 39 | #include "connect.h" |
ce0ae89a | 40 | #include "ftp.h" |
30b30ec1 AL |
41 | /*}}}*/ |
42 | ||
43 | unsigned long TimeOut = 120; | |
44 | URI Proxy; | |
ce0ae89a AL |
45 | string FtpMethod::FailFile; |
46 | int FtpMethod::FailFd = -1; | |
47 | time_t FtpMethod::FailTime = 0; | |
30b30ec1 AL |
48 | |
49 | // FTPConn::FTPConn - Constructor /*{{{*/ | |
50 | // --------------------------------------------------------------------- | |
51 | /* */ | |
52 | FTPConn::FTPConn(URI Srv) : Len(0), ServerFd(-1), DataFd(-1), | |
53 | DataListenFd(-1), ServerName(Srv) | |
54 | { | |
ce0ae89a | 55 | Debug = _config->FindB("Debug::Acquire::Ftp",false); |
30b30ec1 AL |
56 | memset(&PasvAddr,0,sizeof(PasvAddr)); |
57 | } | |
58 | /*}}}*/ | |
59 | // FTPConn::~FTPConn - Destructor /*{{{*/ | |
60 | // --------------------------------------------------------------------- | |
61 | /* */ | |
62 | FTPConn::~FTPConn() | |
63 | { | |
64 | Close(); | |
65 | } | |
66 | /*}}}*/ | |
67 | // FTPConn::Close - Close down the connection /*{{{*/ | |
68 | // --------------------------------------------------------------------- | |
69 | /* Just tear down the socket and data socket */ | |
70 | void FTPConn::Close() | |
71 | { | |
72 | close(ServerFd); | |
73 | ServerFd = -1; | |
74 | close(DataFd); | |
75 | DataFd = -1; | |
76 | close(DataListenFd); | |
77 | DataListenFd = -1; | |
78 | memset(&PasvAddr,0,sizeof(PasvAddr)); | |
79 | } | |
80 | /*}}}*/ | |
81 | // FTPConn::Open - Open a new connection /*{{{*/ | |
82 | // --------------------------------------------------------------------- | |
83 | /* Connect to the server using a non-blocking connection and perform a | |
84 | login. */ | |
ce0ae89a | 85 | bool FTPConn::Open(pkgAcqMethod *Owner) |
30b30ec1 AL |
86 | { |
87 | // Use the already open connection if possible. | |
88 | if (ServerFd != -1) | |
89 | return true; | |
90 | ||
91 | Close(); | |
92 | ||
93 | // Determine the proxy setting | |
94 | if (getenv("ftp_proxy") == 0) | |
95 | { | |
96 | string DefProxy = _config->Find("Acquire::ftp::Proxy"); | |
97 | string SpecificProxy = _config->Find("Acquire::ftp::Proxy::" + ServerName.Host); | |
98 | if (SpecificProxy.empty() == false) | |
99 | { | |
100 | if (SpecificProxy == "DIRECT") | |
101 | Proxy = ""; | |
102 | else | |
103 | Proxy = SpecificProxy; | |
104 | } | |
105 | else | |
106 | Proxy = DefProxy; | |
107 | } | |
108 | else | |
109 | Proxy = getenv("ftp_proxy"); | |
110 | ||
111 | // Determine what host and port to use based on the proxy settings | |
6d13bbca | 112 | int Port = 0; |
30b30ec1 AL |
113 | string Host; |
114 | if (Proxy.empty() == true) | |
115 | { | |
116 | if (ServerName.Port != 0) | |
117 | Port = ServerName.Port; | |
30b30ec1 AL |
118 | Host = ServerName.Host; |
119 | } | |
120 | else | |
121 | { | |
122 | if (Proxy.Port != 0) | |
123 | Port = Proxy.Port; | |
124 | Host = Proxy.Host; | |
125 | } | |
6d13bbca | 126 | |
0837bd25 | 127 | // Connect to the remote server |
9505213b | 128 | if (Connect(Host,Port,"ftp",21,ServerFd,TimeOut,Owner) == false) |
0837bd25 AL |
129 | return false; |
130 | socklen_t Len = sizeof(Peer); | |
131 | if (getpeername(ServerFd,(sockaddr *)&Peer,&Len) != 0) | |
132 | return _error->Errno("getpeername","Unable to determine the peer name"); | |
30b30ec1 | 133 | |
ce0ae89a | 134 | Owner->Status("Logging in"); |
30b30ec1 AL |
135 | return Login(); |
136 | } | |
137 | /*}}}*/ | |
138 | // FTPConn::Login - Login to the remote server /*{{{*/ | |
139 | // --------------------------------------------------------------------- | |
140 | /* This performs both normal login and proxy login using a simples script | |
141 | stored in the config file. */ | |
142 | bool FTPConn::Login() | |
143 | { | |
144 | unsigned int Tag; | |
145 | string Msg; | |
146 | ||
147 | // Setup the variables needed for authentication | |
148 | string User = "anonymous"; | |
149 | string Pass = "apt_get_ftp_2.0@debian.linux.user"; | |
150 | ||
151 | // Fill in the user/pass | |
152 | if (ServerName.User.empty() == false) | |
153 | User = ServerName.User; | |
154 | if (ServerName.Password.empty() == false) | |
155 | Pass = ServerName.Password; | |
156 | ||
157 | // Perform simple login | |
158 | if (Proxy.empty() == true) | |
159 | { | |
160 | // Read the initial response | |
161 | if (ReadResp(Tag,Msg) == false) | |
162 | return false; | |
163 | if (Tag >= 400) | |
164 | return _error->Error("Server refused our connection and said: %s",Msg.c_str()); | |
165 | ||
166 | // Send the user | |
167 | if (WriteMsg(Tag,Msg,"USER %s",User.c_str()) == false) | |
168 | return false; | |
169 | if (Tag >= 400) | |
170 | return _error->Error("USER failed, server said: %s",Msg.c_str()); | |
171 | ||
172 | // Send the Password | |
173 | if (WriteMsg(Tag,Msg,"PASS %s",Pass.c_str()) == false) | |
174 | return false; | |
175 | if (Tag >= 400) | |
176 | return _error->Error("PASS failed, server said: %s",Msg.c_str()); | |
177 | ||
178 | // Enter passive mode | |
10861bb5 AL |
179 | if (_config->Exists("Acquire::FTP::Passive::" + ServerName.Host) == true) |
180 | TryPassive = _config->FindB("Acquire::FTP::Passive::" + ServerName.Host,true); | |
30b30ec1 | 181 | else |
10861bb5 | 182 | TryPassive = _config->FindB("Acquire::FTP::Passive",true); |
30b30ec1 AL |
183 | } |
184 | else | |
185 | { | |
186 | // Read the initial response | |
187 | if (ReadResp(Tag,Msg) == false) | |
188 | return false; | |
189 | if (Tag >= 400) | |
190 | return _error->Error("Server refused our connection and said: %s",Msg.c_str()); | |
191 | ||
192 | // Perform proxy script execution | |
193 | Configuration::Item const *Opts = _config->Tree("Acquire::ftp::ProxyLogin"); | |
194 | if (Opts == 0 || Opts->Child == 0) | |
195 | return _error->Error("A proxy server was specified but no login " | |
196 | "script, Acquire::ftp::ProxyLogin is empty."); | |
197 | Opts = Opts->Child; | |
198 | ||
199 | // Iterate over the entire login script | |
200 | for (; Opts != 0; Opts = Opts->Next) | |
201 | { | |
202 | if (Opts->Value.empty() == true) | |
203 | continue; | |
204 | ||
205 | // Substitute the variables into the command | |
206 | char SitePort[20]; | |
ce0ae89a AL |
207 | if (ServerName.Port != 0) |
208 | sprintf(SitePort,"%u",ServerName.Port); | |
209 | else | |
10861bb5 | 210 | strcpy(SitePort,"21"); |
30b30ec1 AL |
211 | string Tmp = Opts->Value; |
212 | Tmp = SubstVar(Tmp,"$(PROXY_USER)",Proxy.User); | |
213 | Tmp = SubstVar(Tmp,"$(PROXY_PASS)",Proxy.Password); | |
214 | Tmp = SubstVar(Tmp,"$(SITE_USER)",User); | |
215 | Tmp = SubstVar(Tmp,"$(SITE_PASS)",Pass); | |
216 | Tmp = SubstVar(Tmp,"$(SITE_PORT)",SitePort); | |
217 | Tmp = SubstVar(Tmp,"$(SITE)",ServerName.Host); | |
218 | ||
219 | // Send the command | |
220 | if (WriteMsg(Tag,Msg,"%s",Tmp.c_str()) == false) | |
221 | return false; | |
222 | if (Tag >= 400) | |
223 | return _error->Error("Login script command '%s' failed, server said: %s",Tmp.c_str(),Msg.c_str()); | |
224 | } | |
225 | ||
226 | // Enter passive mode | |
227 | TryPassive = false; | |
10861bb5 AL |
228 | if (_config->Exists("Acquire::FTP::Passive::" + ServerName.Host) == true) |
229 | TryPassive = _config->FindB("Acquire::FTP::Passive::" + ServerName.Host,true); | |
30b30ec1 AL |
230 | else |
231 | { | |
10861bb5 AL |
232 | if (_config->Exists("Acquire::FTP::Proxy::Passive") == true) |
233 | TryPassive = _config->FindB("Acquire::FTP::Proxy::Passive",true); | |
30b30ec1 | 234 | else |
10861bb5 | 235 | TryPassive = _config->FindB("Acquire::FTP::Passive",true); |
30b30ec1 AL |
236 | } |
237 | } | |
238 | ||
239 | // Binary mode | |
240 | if (WriteMsg(Tag,Msg,"TYPE I") == false) | |
241 | return false; | |
242 | if (Tag >= 400) | |
243 | return _error->Error("TYPE failed, server said: %s",Msg.c_str()); | |
244 | ||
245 | return true; | |
246 | } | |
247 | /*}}}*/ | |
248 | // FTPConn::ReadLine - Read a line from the server /*{{{*/ | |
249 | // --------------------------------------------------------------------- | |
250 | /* This performs a very simple buffered read. */ | |
251 | bool FTPConn::ReadLine(string &Text) | |
252 | { | |
2e90f6e0 AL |
253 | if (ServerFd == -1) |
254 | return false; | |
255 | ||
30b30ec1 AL |
256 | // Suck in a line |
257 | while (Len < sizeof(Buffer)) | |
258 | { | |
259 | // Scan the buffer for a new line | |
260 | for (unsigned int I = 0; I != Len; I++) | |
261 | { | |
262 | // Escape some special chars | |
263 | if (Buffer[I] == 0) | |
264 | Buffer[I] = '?'; | |
265 | ||
266 | // End of line? | |
267 | if (Buffer[I] != '\n') | |
268 | continue; | |
269 | ||
270 | I++; | |
271 | Text = string(Buffer,I); | |
272 | memmove(Buffer,Buffer+I,Len - I); | |
273 | Len -= I; | |
274 | return true; | |
275 | } | |
276 | ||
277 | // Wait for some data.. | |
278 | if (WaitFd(ServerFd,false,TimeOut) == false) | |
ce0ae89a AL |
279 | { |
280 | Close(); | |
30b30ec1 | 281 | return _error->Error("Connection timeout"); |
ce0ae89a | 282 | } |
30b30ec1 AL |
283 | |
284 | // Suck it back | |
2e90f6e0 | 285 | int Res = read(ServerFd,Buffer + Len,sizeof(Buffer) - Len); |
30b30ec1 | 286 | if (Res <= 0) |
ce0ae89a | 287 | { |
f93d1355 | 288 | _error->Errno("read","Read error"); |
ce0ae89a | 289 | Close(); |
f93d1355 | 290 | return false; |
ce0ae89a | 291 | } |
30b30ec1 AL |
292 | Len += Res; |
293 | } | |
294 | ||
295 | return _error->Error("A response overflowed the buffer."); | |
296 | } | |
297 | /*}}}*/ | |
298 | // FTPConn::ReadResp - Read a full response from the server /*{{{*/ | |
299 | // --------------------------------------------------------------------- | |
300 | /* This reads a reply code from the server, it handles both p */ | |
301 | bool FTPConn::ReadResp(unsigned int &Ret,string &Text) | |
302 | { | |
303 | // Grab the first line of the response | |
304 | string Msg; | |
305 | if (ReadLine(Msg) == false) | |
306 | return false; | |
307 | ||
308 | // Get the ID code | |
309 | char *End; | |
310 | Ret = strtol(Msg.c_str(),&End,10); | |
311 | if (End - Msg.c_str() != 3) | |
312 | return _error->Error("Protocol corruption"); | |
313 | ||
314 | // All done ? | |
315 | Text = Msg.c_str()+4; | |
316 | if (*End == ' ') | |
317 | { | |
318 | if (Debug == true) | |
ce0ae89a | 319 | cerr << "<- '" << QuoteString(Text,"") << "'" << endl; |
30b30ec1 AL |
320 | return true; |
321 | } | |
322 | ||
323 | if (*End != '-') | |
324 | return _error->Error("Protocol corruption"); | |
325 | ||
326 | /* Okay, here we do the continued message trick. This is foolish, but | |
327 | proftpd follows the protocol as specified and wu-ftpd doesn't, so | |
328 | we filter. I wonder how many clients break if you use proftpd and | |
329 | put a '- in the 3rd spot in the message? */ | |
330 | char Leader[4]; | |
331 | strncpy(Leader,Msg.c_str(),3); | |
332 | Leader[3] = 0; | |
333 | while (ReadLine(Msg) == true) | |
334 | { | |
335 | // Short, it must be using RFC continuation.. | |
336 | if (Msg.length() < 4) | |
337 | { | |
338 | Text += Msg; | |
339 | continue; | |
340 | } | |
341 | ||
342 | // Oops, finished | |
343 | if (strncmp(Msg.c_str(),Leader,3) == 0 && Msg[3] == ' ') | |
344 | { | |
345 | Text += Msg.c_str()+4; | |
346 | break; | |
347 | } | |
348 | ||
349 | // This message has the wu-ftpd style reply code prefixed | |
350 | if (strncmp(Msg.c_str(),Leader,3) == 0 && Msg[3] == '-') | |
351 | { | |
352 | Text += Msg.c_str()+4; | |
353 | continue; | |
354 | } | |
355 | ||
356 | // Must be RFC style prefixing | |
357 | Text += Msg; | |
358 | } | |
359 | ||
360 | if (Debug == true && _error->PendingError() == false) | |
ce0ae89a | 361 | cerr << "<- '" << QuoteString(Text,"") << "'" << endl; |
30b30ec1 AL |
362 | |
363 | return !_error->PendingError(); | |
364 | } | |
365 | /*}}}*/ | |
366 | // FTPConn::WriteMsg - Send a message to the server /*{{{*/ | |
367 | // --------------------------------------------------------------------- | |
368 | /* Simple printf like function.. */ | |
369 | bool FTPConn::WriteMsg(unsigned int &Ret,string &Text,const char *Fmt,...) | |
370 | { | |
371 | va_list args; | |
372 | va_start(args,Fmt); | |
373 | ||
374 | // sprintf the description | |
375 | char S[400]; | |
376 | vsnprintf(S,sizeof(S) - 4,Fmt,args); | |
377 | strcat(S,"\r\n"); | |
378 | ||
379 | if (Debug == true) | |
ce0ae89a | 380 | cerr << "-> '" << QuoteString(S,"") << "'" << endl; |
30b30ec1 AL |
381 | |
382 | // Send it off | |
383 | unsigned long Len = strlen(S); | |
384 | unsigned long Start = 0; | |
385 | while (Len != 0) | |
386 | { | |
387 | if (WaitFd(ServerFd,true,TimeOut) == false) | |
ce0ae89a AL |
388 | { |
389 | Close(); | |
30b30ec1 | 390 | return _error->Error("Connection timeout"); |
ce0ae89a | 391 | } |
30b30ec1 AL |
392 | |
393 | int Res = write(ServerFd,S + Start,Len); | |
394 | if (Res <= 0) | |
ce0ae89a | 395 | { |
f93d1355 | 396 | _error->Errno("write","Write Error"); |
ce0ae89a | 397 | Close(); |
f93d1355 | 398 | return false; |
ce0ae89a AL |
399 | } |
400 | ||
30b30ec1 AL |
401 | Len -= Res; |
402 | Start += Res; | |
403 | } | |
404 | ||
405 | return ReadResp(Ret,Text); | |
406 | } | |
407 | /*}}}*/ | |
408 | // FTPConn::GoPasv - Enter Passive mode /*{{{*/ | |
409 | // --------------------------------------------------------------------- | |
410 | /* Try to enter passive mode, the return code does not indicate if passive | |
411 | mode could or could not be established, only if there was a fatal error. | |
412 | Borrowed mostly from lftp. We have to enter passive mode every time | |
413 | we make a data connection :| */ | |
414 | bool FTPConn::GoPasv() | |
415 | { | |
416 | // Try to enable pasv mode | |
417 | unsigned int Tag; | |
418 | string Msg; | |
419 | if (WriteMsg(Tag,Msg,"PASV") == false) | |
420 | return false; | |
421 | ||
422 | // Unsupported function | |
423 | string::size_type Pos = Msg.find('('); | |
424 | if (Tag >= 400 || Pos == string::npos) | |
425 | { | |
426 | memset(&PasvAddr,0,sizeof(PasvAddr)); | |
427 | return true; | |
428 | } | |
429 | ||
430 | // Scan it | |
431 | unsigned a0,a1,a2,a3,p0,p1; | |
432 | if (sscanf(Msg.c_str() + Pos,"(%u,%u,%u,%u,%u,%u)",&a0,&a1,&a2,&a3,&p0,&p1) != 6) | |
433 | { | |
434 | memset(&PasvAddr,0,sizeof(PasvAddr)); | |
435 | return true; | |
436 | } | |
437 | ||
438 | // lftp used this horrid byte order manipulation.. Ik. | |
439 | PasvAddr.sin_family = AF_INET; | |
440 | unsigned char *a; | |
441 | unsigned char *p; | |
442 | a = (unsigned char *)&PasvAddr.sin_addr; | |
443 | p = (unsigned char *)&PasvAddr.sin_port; | |
444 | ||
445 | // Some evil servers return 0 to mean their addr | |
446 | if (a0 == 0 && a1 == 0 && a2 == 0 && a3 == 0) | |
447 | { | |
448 | PasvAddr.sin_addr = Peer.sin_addr; | |
449 | } | |
450 | else | |
451 | { | |
452 | a[0] = a0; | |
453 | a[1] = a1; | |
454 | a[2] = a2; | |
455 | a[3] = a3; | |
456 | } | |
457 | ||
458 | p[0] = p0; | |
459 | p[1] = p1; | |
460 | ||
461 | return true; | |
462 | } | |
463 | /*}}}*/ | |
464 | // FTPConn::Size - Return the size of a file /*{{{*/ | |
465 | // --------------------------------------------------------------------- | |
466 | /* Grab the file size from the server, 0 means no size or empty file */ | |
ce0ae89a | 467 | bool FTPConn::Size(const char *Path,unsigned long &Size) |
30b30ec1 AL |
468 | { |
469 | // Query the size | |
470 | unsigned int Tag; | |
471 | string Msg; | |
ce0ae89a | 472 | Size = 0; |
30b30ec1 AL |
473 | if (WriteMsg(Tag,Msg,"SIZE %s",Path) == false) |
474 | return false; | |
475 | ||
476 | char *End; | |
ce0ae89a | 477 | Size = strtol(Msg.c_str(),&End,10); |
30b30ec1 | 478 | if (Tag >= 400 || End == Msg.c_str()) |
ce0ae89a AL |
479 | Size = 0; |
480 | return true; | |
30b30ec1 AL |
481 | } |
482 | /*}}}*/ | |
483 | // FTPConn::ModTime - Return the modification time of the file /*{{{*/ | |
484 | // --------------------------------------------------------------------- | |
485 | /* Like Size no error is returned if the command is not supported. If the | |
486 | command fails then time is set to the current time of day to fool | |
487 | date checks. */ | |
488 | bool FTPConn::ModTime(const char *Path, time_t &Time) | |
489 | { | |
490 | Time = time(&Time); | |
491 | ||
492 | // Query the mod time | |
493 | unsigned int Tag; | |
494 | string Msg; | |
495 | if (WriteMsg(Tag,Msg,"MDTM %s",Path) == false) | |
496 | return false; | |
497 | if (Tag >= 400 || Msg.empty() == true || isdigit(Msg[0]) == 0) | |
498 | return true; | |
499 | ||
500 | // Parse it | |
501 | struct tm tm; | |
502 | memset(&tm,0,sizeof(tm)); | |
503 | if (sscanf(Msg.c_str(),"%4d%2d%2d%2d%2d%2d",&tm.tm_year,&tm.tm_mon, | |
504 | &tm.tm_mday,&tm.tm_hour,&tm.tm_min,&tm.tm_sec) != 6) | |
505 | return true; | |
506 | ||
507 | tm.tm_year -= 1900; | |
508 | tm.tm_mon--; | |
509 | ||
510 | /* We use timegm from the GNU C library, libapt-pkg will provide this | |
511 | symbol if it does not exist */ | |
512 | Time = timegm(&tm); | |
513 | return true; | |
514 | } | |
515 | /*}}}*/ | |
516 | // FTPConn::CreateDataFd - Get a data connection /*{{{*/ | |
517 | // --------------------------------------------------------------------- | |
518 | /* Create the data connection. Call FinalizeDataFd after this though.. */ | |
519 | bool FTPConn::CreateDataFd() | |
520 | { | |
521 | close(DataFd); | |
522 | DataFd = -1; | |
523 | ||
524 | // Attempt to enter passive mode. | |
525 | if (TryPassive == true) | |
526 | { | |
527 | if (GoPasv() == false) | |
528 | return false; | |
529 | ||
530 | // Oops, didn't work out, don't bother trying again. | |
531 | if (PasvAddr.sin_port == 0) | |
532 | TryPassive = false; | |
533 | } | |
534 | ||
535 | // Passive mode? | |
536 | if (PasvAddr.sin_port != 0) | |
537 | { | |
538 | // Get a socket | |
539 | if ((DataFd = socket(AF_INET,SOCK_STREAM,0)) < 0) | |
540 | return _error->Errno("socket","Could not create a socket"); | |
541 | ||
542 | // Connect to the server | |
543 | SetNonBlock(DataFd,true); | |
544 | if (connect(DataFd,(sockaddr *)&PasvAddr,sizeof(PasvAddr)) < 0 && | |
545 | errno != EINPROGRESS) | |
546 | return _error->Errno("socket","Could not create a socket"); | |
547 | ||
548 | /* This implements a timeout for connect by opening the connection | |
6d13bbca | 549 | nonblocking */ |
30b30ec1 AL |
550 | if (WaitFd(ServerFd,true,TimeOut) == false) |
551 | return _error->Error("Could not connect data socket, connection timed out"); | |
552 | unsigned int Err; | |
553 | unsigned int Len = sizeof(Err); | |
554 | if (getsockopt(ServerFd,SOL_SOCKET,SO_ERROR,&Err,&Len) != 0) | |
555 | return _error->Errno("getsockopt","Failed"); | |
556 | if (Err != 0) | |
557 | return _error->Error("Could not connect."); | |
558 | ||
559 | return true; | |
560 | } | |
561 | ||
562 | // Port mode :< | |
2de438e7 AL |
563 | close(DataListenFd); |
564 | DataListenFd = -1; | |
565 | ||
566 | // Get a socket | |
567 | if ((DataListenFd = socket(AF_INET,SOCK_STREAM,0)) < 0) | |
568 | return _error->Errno("socket","Could not create a socket"); | |
30b30ec1 | 569 | |
2de438e7 | 570 | // Bind and listen |
30b30ec1 | 571 | sockaddr_in Addr; |
2de438e7 AL |
572 | memset(&Addr,0,sizeof(Addr)); |
573 | if (bind(DataListenFd,(sockaddr *)&Addr,sizeof(Addr)) < 0) | |
574 | return _error->Errno("bind","Could not bind a socket"); | |
575 | if (listen(DataListenFd,1) < 0) | |
576 | return _error->Errno("listen","Could not listen on the socket"); | |
577 | SetNonBlock(DataListenFd,true); | |
578 | ||
579 | // Determine the name to send to the remote | |
30b30ec1 AL |
580 | sockaddr_in Addr2; |
581 | socklen_t Jnk = sizeof(Addr); | |
582 | if (getsockname(DataListenFd,(sockaddr *)&Addr,&Jnk) < 0) | |
583 | return _error->Errno("getsockname","Could not determine the socket's name"); | |
584 | Jnk = sizeof(Addr2); | |
585 | if (getsockname(ServerFd,(sockaddr *)&Addr2,&Jnk) < 0) | |
586 | return _error->Errno("getsockname","Could not determine the socket's name"); | |
587 | ||
588 | // This bit ripped from qftp | |
589 | unsigned long badr = ntohl(*(unsigned long *)&Addr2.sin_addr); | |
590 | unsigned long bp = ntohs(Addr.sin_port); | |
591 | ||
592 | // Send the port command | |
593 | unsigned int Tag; | |
594 | string Msg; | |
595 | if (WriteMsg(Tag,Msg,"PORT %d,%d,%d,%d,%d,%d", | |
596 | (int) (badr >> 24) & 0xff, (int) (badr >> 16) & 0xff, | |
597 | (int) (badr >> 8) & 0xff, (int) badr & 0xff, | |
598 | (int) (bp >> 8) & 0xff, (int) bp & 0xff) == false) | |
599 | return false; | |
600 | if (Tag >= 400) | |
601 | return _error->Error("Unable to send port command"); | |
602 | ||
603 | return true; | |
604 | } | |
605 | /*}}}*/ | |
606 | // FTPConn::Finalize - Complete the Data connection /*{{{*/ | |
607 | // --------------------------------------------------------------------- | |
608 | /* If the connection is in port mode this waits for the other end to hook | |
609 | up to us. */ | |
610 | bool FTPConn::Finalize() | |
611 | { | |
612 | // Passive mode? Do nothing | |
613 | if (PasvAddr.sin_port != 0) | |
614 | return true; | |
615 | ||
616 | // Close any old socket.. | |
617 | close(DataFd); | |
618 | DataFd = -1; | |
619 | ||
620 | // Wait for someone to connect.. | |
621 | if (WaitFd(DataListenFd,false,TimeOut) == false) | |
622 | return _error->Error("Data socket connect timed out"); | |
623 | ||
624 | // Accept the connection | |
625 | struct sockaddr_in Addr; | |
626 | socklen_t Len = sizeof(Addr); | |
627 | DataFd = accept(DataListenFd,(struct sockaddr *)&Addr,&Len); | |
628 | if (DataFd < 0) | |
629 | return _error->Errno("accept","Unable to accept connection"); | |
630 | ||
2de438e7 AL |
631 | close(DataListenFd); |
632 | DataListenFd = -1; | |
633 | ||
30b30ec1 AL |
634 | return true; |
635 | } | |
636 | /*}}}*/ | |
637 | // FTPConn::Get - Get a file /*{{{*/ | |
638 | // --------------------------------------------------------------------- | |
639 | /* This opens a data connection, sends REST and RETR and then | |
640 | transfers the file over. */ | |
ce0ae89a AL |
641 | bool FTPConn::Get(const char *Path,FileFd &To,unsigned long Resume, |
642 | MD5Summation &MD5,bool &Missing) | |
30b30ec1 | 643 | { |
ce0ae89a | 644 | Missing = false; |
30b30ec1 AL |
645 | if (CreateDataFd() == false) |
646 | return false; | |
647 | ||
648 | unsigned int Tag; | |
ce0ae89a | 649 | string Msg; |
30b30ec1 AL |
650 | if (Resume != 0) |
651 | { | |
652 | if (WriteMsg(Tag,Msg,"REST %u",Resume) == false) | |
653 | return false; | |
654 | if (Tag >= 400) | |
655 | Resume = 0; | |
656 | } | |
657 | ||
658 | if (To.Truncate(Resume) == false) | |
659 | return false; | |
10861bb5 AL |
660 | |
661 | if (To.Seek(0) == false) | |
662 | return false; | |
663 | ||
664 | if (Resume != 0) | |
665 | { | |
666 | if (MD5.AddFD(To.Fd(),Resume) == false) | |
667 | { | |
668 | _error->Errno("read","Problem hashing file"); | |
669 | return false; | |
670 | } | |
671 | } | |
30b30ec1 AL |
672 | |
673 | // Send the get command | |
674 | if (WriteMsg(Tag,Msg,"RETR %s",Path) == false) | |
675 | return false; | |
676 | ||
677 | if (Tag >= 400) | |
ce0ae89a AL |
678 | { |
679 | if (Tag == 550) | |
680 | Missing = true; | |
30b30ec1 | 681 | return _error->Error("Unable to fetch file, server said '%s'",Msg.c_str()); |
ce0ae89a | 682 | } |
30b30ec1 AL |
683 | |
684 | // Finish off the data connection | |
685 | if (Finalize() == false) | |
686 | return false; | |
687 | ||
688 | // Copy loop | |
689 | unsigned char Buffer[4096]; | |
690 | while (1) | |
691 | { | |
692 | // Wait for some data.. | |
693 | if (WaitFd(DataFd,false,TimeOut) == false) | |
25dbb396 AL |
694 | { |
695 | Close(); | |
696 | return _error->Error("Data socket timed out"); | |
697 | } | |
698 | ||
30b30ec1 AL |
699 | // Read the data.. |
700 | int Res = read(DataFd,Buffer,sizeof(Buffer)); | |
701 | if (Res == 0) | |
702 | break; | |
703 | if (Res < 0) | |
704 | { | |
705 | if (errno == EAGAIN) | |
706 | continue; | |
707 | break; | |
708 | } | |
10861bb5 AL |
709 | |
710 | MD5.Add(Buffer,Res); | |
30b30ec1 | 711 | if (To.Write(Buffer,Res) == false) |
25dbb396 AL |
712 | { |
713 | Close(); | |
30b30ec1 | 714 | return false; |
25dbb396 | 715 | } |
30b30ec1 AL |
716 | } |
717 | ||
718 | // All done | |
719 | close(DataFd); | |
720 | DataFd = -1; | |
721 | ||
722 | // Read the closing message from the server | |
723 | if (ReadResp(Tag,Msg) == false) | |
724 | return false; | |
725 | if (Tag >= 400) | |
726 | return _error->Error("Data transfer failed, server said '%s'",Msg.c_str()); | |
727 | return true; | |
728 | } | |
729 | /*}}}*/ | |
730 | ||
ce0ae89a AL |
731 | // FtpMethod::FtpMethod - Constructor /*{{{*/ |
732 | // --------------------------------------------------------------------- | |
733 | /* */ | |
734 | FtpMethod::FtpMethod() : pkgAcqMethod("1.0",SendConfig) | |
30b30ec1 | 735 | { |
ce0ae89a AL |
736 | signal(SIGTERM,SigTerm); |
737 | signal(SIGINT,SigTerm); | |
30b30ec1 | 738 | |
ce0ae89a AL |
739 | Server = 0; |
740 | FailFd = -1; | |
741 | } | |
742 | /*}}}*/ | |
743 | // FtpMethod::SigTerm - Handle a fatal signal /*{{{*/ | |
744 | // --------------------------------------------------------------------- | |
745 | /* This closes and timestamps the open file. This is neccessary to get | |
746 | resume behavoir on user abort */ | |
747 | void FtpMethod::SigTerm(int) | |
748 | { | |
749 | if (FailFd == -1) | |
ffe9323a | 750 | _exit(100); |
ce0ae89a AL |
751 | close(FailFd); |
752 | ||
753 | // Timestamp | |
754 | struct utimbuf UBuf; | |
755 | UBuf.actime = FailTime; | |
756 | UBuf.modtime = FailTime; | |
757 | utime(FailFile.c_str(),&UBuf); | |
758 | ||
ffe9323a | 759 | _exit(100); |
ce0ae89a AL |
760 | } |
761 | /*}}}*/ | |
762 | // FtpMethod::Configuration - Handle a configuration message /*{{{*/ | |
763 | // --------------------------------------------------------------------- | |
764 | /* We stash the desired pipeline depth */ | |
765 | bool FtpMethod::Configuration(string Message) | |
766 | { | |
767 | if (pkgAcqMethod::Configuration(Message) == false) | |
768 | return false; | |
769 | ||
770 | TimeOut = _config->FindI("Acquire::Ftp::Timeout",TimeOut); | |
771 | return true; | |
772 | } | |
773 | /*}}}*/ | |
774 | // FtpMethod::Fetch - Fetch a file /*{{{*/ | |
775 | // --------------------------------------------------------------------- | |
10861bb5 | 776 | /* Fetch a single file, called by the base class.. */ |
ce0ae89a AL |
777 | bool FtpMethod::Fetch(FetchItem *Itm) |
778 | { | |
779 | URI Get = Itm->Uri; | |
780 | const char *File = Get.Path.c_str(); | |
781 | FetchResult Res; | |
782 | Res.Filename = Itm->DestFile; | |
783 | Res.IMSHit = false; | |
784 | ||
785 | // Connect to the server | |
786 | if (Server == 0 || Server->Comp(Get) == false) | |
30b30ec1 | 787 | { |
ce0ae89a AL |
788 | delete Server; |
789 | Server = new FTPConn(Get); | |
790 | } | |
791 | ||
792 | // Could not connect is a transient error.. | |
793 | if (Server->Open(this) == false) | |
794 | { | |
b3e53cec | 795 | Server->Close(); |
ce0ae89a AL |
796 | Fail(true); |
797 | return true; | |
798 | } | |
30b30ec1 | 799 | |
ce0ae89a | 800 | // Get the files information |
f26f6d38 | 801 | Status("Query"); |
ce0ae89a AL |
802 | unsigned long Size; |
803 | if (Server->Size(File,Size) == false || | |
804 | Server->ModTime(File,FailTime) == false) | |
805 | { | |
806 | Fail(true); | |
807 | return true; | |
808 | } | |
809 | Res.Size = Size; | |
810 | ||
811 | // See if it is an IMS hit | |
812 | if (Itm->LastModified == FailTime) | |
813 | { | |
814 | Res.Size = 0; | |
815 | Res.IMSHit = true; | |
816 | URIDone(Res); | |
817 | return true; | |
818 | } | |
819 | ||
820 | // See if the file exists | |
821 | struct stat Buf; | |
822 | if (stat(Itm->DestFile.c_str(),&Buf) == 0) | |
823 | { | |
824 | if (Size == (unsigned)Buf.st_size && FailTime == Buf.st_mtime) | |
30b30ec1 | 825 | { |
ce0ae89a AL |
826 | Res.Size = Buf.st_size; |
827 | Res.LastModified = Buf.st_mtime; | |
828 | URIDone(Res); | |
829 | return true; | |
30b30ec1 AL |
830 | } |
831 | ||
ce0ae89a | 832 | // Resume? |
10861bb5 | 833 | if (FailTime == Buf.st_mtime && Size > (unsigned)Buf.st_size) |
ce0ae89a AL |
834 | Res.ResumePoint = Buf.st_size; |
835 | } | |
836 | ||
837 | // Open the file | |
838 | MD5Summation MD5; | |
839 | { | |
840 | FileFd Fd(Itm->DestFile,FileFd::WriteAny); | |
841 | if (_error->PendingError() == true) | |
842 | return false; | |
843 | ||
844 | URIStart(Res); | |
845 | ||
846 | FailFile = Itm->DestFile; | |
847 | FailFile.c_str(); // Make sure we dont do a malloc in the signal handler | |
848 | FailFd = Fd.Fd(); | |
849 | ||
850 | bool Missing; | |
851 | if (Server->Get(File,Fd,Res.ResumePoint,MD5,Missing) == false) | |
30b30ec1 | 852 | { |
0dfc0829 AL |
853 | Fd.Close(); |
854 | ||
855 | // Timestamp | |
856 | struct utimbuf UBuf; | |
857 | time(&UBuf.actime); | |
858 | UBuf.actime = FailTime; | |
859 | UBuf.modtime = FailTime; | |
860 | utime(FailFile.c_str(),&UBuf); | |
861 | ||
ce0ae89a AL |
862 | // If the file is missing we hard fail otherwise transient fail |
863 | if (Missing == true) | |
864 | return false; | |
865 | Fail(true); | |
866 | return true; | |
30b30ec1 | 867 | } |
ce0ae89a AL |
868 | |
869 | Res.Size = Fd.Size(); | |
30b30ec1 AL |
870 | } |
871 | ||
ce0ae89a AL |
872 | Res.LastModified = FailTime; |
873 | Res.MD5Sum = MD5.Result(); | |
874 | ||
875 | // Timestamp | |
876 | struct utimbuf UBuf; | |
877 | time(&UBuf.actime); | |
878 | UBuf.actime = FailTime; | |
879 | UBuf.modtime = FailTime; | |
880 | utime(Queue->DestFile.c_str(),&UBuf); | |
881 | FailFd = -1; | |
882 | ||
883 | URIDone(Res); | |
884 | ||
885 | return true; | |
886 | } | |
887 | /*}}}*/ | |
888 | ||
d4489322 | 889 | int main(int argc,const char *argv[]) |
ce0ae89a | 890 | { |
d4489322 AL |
891 | /* See if we should be come the http client - we do this for http |
892 | proxy urls */ | |
893 | if (getenv("ftp_proxy") != 0) | |
894 | { | |
895 | URI Proxy = string(getenv("ftp_proxy")); | |
896 | if (Proxy.Access == "http") | |
897 | { | |
898 | // Copy over the environment setting | |
899 | char S[300]; | |
900 | snprintf(S,sizeof(S),"http_proxy=%s",getenv("ftp_proxy")); | |
901 | putenv(S); | |
902 | ||
903 | // Run the http method | |
904 | string Path = flNotFile(argv[0]) + "/http"; | |
f436bdc5 | 905 | execl(Path.c_str(),Path.c_str(),0); |
d4489322 AL |
906 | cerr << "Unable to invoke " << Path << endl; |
907 | exit(100); | |
908 | } | |
909 | } | |
910 | ||
ce0ae89a AL |
911 | FtpMethod Mth; |
912 | ||
913 | return Mth.Run(); | |
30b30ec1 | 914 | } |