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30b30ec1 AL |
1 | // -*- mode: cpp; mode: fold -*- |
2 | // Description /*{{{*/ | |
ce0ae89a | 3 | // $Id: ftp.cc,v 1.2 1999/03/15 07:20:41 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. | |
12 | ||
13 | ##################################################################### */ | |
14 | /*}}}*/ | |
15 | // Include Files /*{{{*/ | |
16 | #include <apt-pkg/fileutl.h> | |
17 | #include <apt-pkg/acquire-method.h> | |
18 | #include <apt-pkg/error.h> | |
19 | #include <apt-pkg/md5.h> | |
30b30ec1 AL |
20 | |
21 | #include <sys/stat.h> | |
22 | #include <sys/time.h> | |
23 | #include <utime.h> | |
24 | #include <unistd.h> | |
25 | #include <signal.h> | |
26 | #include <stdio.h> | |
27 | #include <errno.h> | |
28 | #include <stdarg.h> | |
29 | ||
30 | // Internet stuff | |
31 | #include <netinet/in.h> | |
32 | #include <sys/socket.h> | |
33 | #include <arpa/inet.h> | |
34 | #include <netdb.h> | |
35 | ||
ce0ae89a AL |
36 | #include "ftp.h" |
37 | ||
38 | ||
30b30ec1 AL |
39 | /*}}}*/ |
40 | ||
41 | unsigned long TimeOut = 120; | |
42 | URI Proxy; | |
ce0ae89a AL |
43 | string FtpMethod::FailFile; |
44 | int FtpMethod::FailFd = -1; | |
45 | time_t FtpMethod::FailTime = 0; | |
30b30ec1 AL |
46 | |
47 | // FTPConn::FTPConn - Constructor /*{{{*/ | |
48 | // --------------------------------------------------------------------- | |
49 | /* */ | |
50 | FTPConn::FTPConn(URI Srv) : Len(0), ServerFd(-1), DataFd(-1), | |
51 | DataListenFd(-1), ServerName(Srv) | |
52 | { | |
ce0ae89a | 53 | Debug = _config->FindB("Debug::Acquire::Ftp",false); |
30b30ec1 AL |
54 | memset(&PasvAddr,0,sizeof(PasvAddr)); |
55 | } | |
56 | /*}}}*/ | |
57 | // FTPConn::~FTPConn - Destructor /*{{{*/ | |
58 | // --------------------------------------------------------------------- | |
59 | /* */ | |
60 | FTPConn::~FTPConn() | |
61 | { | |
62 | Close(); | |
63 | } | |
64 | /*}}}*/ | |
65 | // FTPConn::Close - Close down the connection /*{{{*/ | |
66 | // --------------------------------------------------------------------- | |
67 | /* Just tear down the socket and data socket */ | |
68 | void FTPConn::Close() | |
69 | { | |
70 | close(ServerFd); | |
71 | ServerFd = -1; | |
72 | close(DataFd); | |
73 | DataFd = -1; | |
74 | close(DataListenFd); | |
75 | DataListenFd = -1; | |
76 | memset(&PasvAddr,0,sizeof(PasvAddr)); | |
77 | } | |
78 | /*}}}*/ | |
79 | // FTPConn::Open - Open a new connection /*{{{*/ | |
80 | // --------------------------------------------------------------------- | |
81 | /* Connect to the server using a non-blocking connection and perform a | |
82 | login. */ | |
83 | string LastHost; | |
84 | in_addr LastHostA; | |
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 | |
112 | int Port = 21; | |
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 | } | |
126 | ||
127 | /* We used a cached address record.. Yes this is against the spec but | |
128 | the way we have setup our rotating dns suggests that this is more | |
129 | sensible */ | |
130 | if (LastHost != Host) | |
131 | { | |
ce0ae89a | 132 | Owner->Status("Connecting to %s",Host.c_str()); |
30b30ec1 AL |
133 | |
134 | // Lookup the host | |
135 | hostent *Addr = gethostbyname(Host.c_str()); | |
136 | if (Addr == 0 || Addr->h_addr_list[0] == 0) | |
137 | return _error->Error("Could not resolve '%s'",Host.c_str()); | |
138 | LastHost = Host; | |
139 | LastHostA = *(in_addr *)(Addr->h_addr_list[0]); | |
140 | } | |
141 | ||
ce0ae89a | 142 | Owner->Status("Connecting to %s (%s)",Host.c_str(),inet_ntoa(LastHostA)); |
30b30ec1 AL |
143 | |
144 | // Get a socket | |
145 | if ((ServerFd = socket(AF_INET,SOCK_STREAM,0)) < 0) | |
146 | return _error->Errno("socket","Could not create a socket"); | |
147 | ||
148 | // Connect to the server | |
149 | struct sockaddr_in server; | |
150 | server.sin_family = AF_INET; | |
151 | server.sin_port = htons(Port); | |
152 | server.sin_addr = LastHostA; | |
153 | SetNonBlock(ServerFd,true); | |
154 | if (connect(ServerFd,(sockaddr *)&server,sizeof(server)) < 0 && | |
155 | errno != EINPROGRESS) | |
156 | return _error->Errno("socket","Could not create a socket"); | |
157 | Peer = server; | |
158 | ||
159 | /* This implements a timeout for connect by opening the connection | |
160 | nonblocking */ | |
161 | if (WaitFd(ServerFd,true,TimeOut) == false) | |
162 | return _error->Error("Could not connect, connection timed out"); | |
163 | unsigned int Err; | |
164 | unsigned int Len = sizeof(Err); | |
165 | if (getsockopt(ServerFd,SOL_SOCKET,SO_ERROR,&Err,&Len) != 0) | |
166 | return _error->Errno("getsockopt","Failed"); | |
167 | if (Err != 0) | |
168 | return _error->Error("Could not connect."); | |
169 | ||
ce0ae89a | 170 | Owner->Status("Logging in"); |
30b30ec1 AL |
171 | return Login(); |
172 | } | |
173 | /*}}}*/ | |
174 | // FTPConn::Login - Login to the remote server /*{{{*/ | |
175 | // --------------------------------------------------------------------- | |
176 | /* This performs both normal login and proxy login using a simples script | |
177 | stored in the config file. */ | |
178 | bool FTPConn::Login() | |
179 | { | |
180 | unsigned int Tag; | |
181 | string Msg; | |
182 | ||
183 | // Setup the variables needed for authentication | |
184 | string User = "anonymous"; | |
185 | string Pass = "apt_get_ftp_2.0@debian.linux.user"; | |
186 | ||
187 | // Fill in the user/pass | |
188 | if (ServerName.User.empty() == false) | |
189 | User = ServerName.User; | |
190 | if (ServerName.Password.empty() == false) | |
191 | Pass = ServerName.Password; | |
192 | ||
193 | // Perform simple login | |
194 | if (Proxy.empty() == true) | |
195 | { | |
196 | // Read the initial response | |
197 | if (ReadResp(Tag,Msg) == false) | |
198 | return false; | |
199 | if (Tag >= 400) | |
200 | return _error->Error("Server refused our connection and said: %s",Msg.c_str()); | |
201 | ||
202 | // Send the user | |
203 | if (WriteMsg(Tag,Msg,"USER %s",User.c_str()) == false) | |
204 | return false; | |
205 | if (Tag >= 400) | |
206 | return _error->Error("USER failed, server said: %s",Msg.c_str()); | |
207 | ||
208 | // Send the Password | |
209 | if (WriteMsg(Tag,Msg,"PASS %s",Pass.c_str()) == false) | |
210 | return false; | |
211 | if (Tag >= 400) | |
212 | return _error->Error("PASS failed, server said: %s",Msg.c_str()); | |
213 | ||
214 | // Enter passive mode | |
215 | TryPassive = false; | |
216 | if (_config->Exists("Acquire::FTP::Passive::" + ServerName.Host) == true && | |
217 | _config->FindB("Acquire::FTP::Passive::" + ServerName.Host,true) == true) | |
218 | { | |
219 | TryPassive = true; | |
220 | } | |
221 | else | |
222 | { | |
223 | if (_config->FindB("Acquire::FTP::Passive",true) == true) | |
224 | TryPassive = true; | |
225 | } | |
226 | } | |
227 | else | |
228 | { | |
229 | // Read the initial response | |
230 | if (ReadResp(Tag,Msg) == false) | |
231 | return false; | |
232 | if (Tag >= 400) | |
233 | return _error->Error("Server refused our connection and said: %s",Msg.c_str()); | |
234 | ||
235 | // Perform proxy script execution | |
236 | Configuration::Item const *Opts = _config->Tree("Acquire::ftp::ProxyLogin"); | |
237 | if (Opts == 0 || Opts->Child == 0) | |
238 | return _error->Error("A proxy server was specified but no login " | |
239 | "script, Acquire::ftp::ProxyLogin is empty."); | |
240 | Opts = Opts->Child; | |
241 | ||
242 | // Iterate over the entire login script | |
243 | for (; Opts != 0; Opts = Opts->Next) | |
244 | { | |
245 | if (Opts->Value.empty() == true) | |
246 | continue; | |
247 | ||
248 | // Substitute the variables into the command | |
249 | char SitePort[20]; | |
ce0ae89a AL |
250 | if (ServerName.Port != 0) |
251 | sprintf(SitePort,"%u",ServerName.Port); | |
252 | else | |
253 | strcat("21",SitePort); | |
30b30ec1 AL |
254 | string Tmp = Opts->Value; |
255 | Tmp = SubstVar(Tmp,"$(PROXY_USER)",Proxy.User); | |
256 | Tmp = SubstVar(Tmp,"$(PROXY_PASS)",Proxy.Password); | |
257 | Tmp = SubstVar(Tmp,"$(SITE_USER)",User); | |
258 | Tmp = SubstVar(Tmp,"$(SITE_PASS)",Pass); | |
259 | Tmp = SubstVar(Tmp,"$(SITE_PORT)",SitePort); | |
260 | Tmp = SubstVar(Tmp,"$(SITE)",ServerName.Host); | |
261 | ||
262 | // Send the command | |
263 | if (WriteMsg(Tag,Msg,"%s",Tmp.c_str()) == false) | |
264 | return false; | |
265 | if (Tag >= 400) | |
266 | return _error->Error("Login script command '%s' failed, server said: %s",Tmp.c_str(),Msg.c_str()); | |
267 | } | |
268 | ||
269 | // Enter passive mode | |
270 | TryPassive = false; | |
271 | if (_config->Exists("Acquire::FTP::Passive::" + ServerName.Host) == true && | |
272 | _config->FindB("Acquire::FTP::Passive::" + ServerName.Host,true) == true) | |
273 | { | |
274 | TryPassive = true; | |
275 | } | |
276 | else | |
277 | { | |
278 | if (_config->Exists("Acquire::FTP::Proxy::Passive") == true && | |
279 | _config->FindB("Acquire::FTP::Proxy::Passive",true) == true) | |
280 | TryPassive = true; | |
281 | else | |
282 | if (_config->FindB("Acquire::FTP::Passive",true) == true) | |
283 | TryPassive = true; | |
284 | } | |
285 | } | |
286 | ||
287 | // Binary mode | |
288 | if (WriteMsg(Tag,Msg,"TYPE I") == false) | |
289 | return false; | |
290 | if (Tag >= 400) | |
291 | return _error->Error("TYPE failed, server said: %s",Msg.c_str()); | |
292 | ||
293 | return true; | |
294 | } | |
295 | /*}}}*/ | |
296 | // FTPConn::ReadLine - Read a line from the server /*{{{*/ | |
297 | // --------------------------------------------------------------------- | |
298 | /* This performs a very simple buffered read. */ | |
299 | bool FTPConn::ReadLine(string &Text) | |
300 | { | |
301 | // Suck in a line | |
302 | while (Len < sizeof(Buffer)) | |
303 | { | |
304 | // Scan the buffer for a new line | |
305 | for (unsigned int I = 0; I != Len; I++) | |
306 | { | |
307 | // Escape some special chars | |
308 | if (Buffer[I] == 0) | |
309 | Buffer[I] = '?'; | |
310 | ||
311 | // End of line? | |
312 | if (Buffer[I] != '\n') | |
313 | continue; | |
314 | ||
315 | I++; | |
316 | Text = string(Buffer,I); | |
317 | memmove(Buffer,Buffer+I,Len - I); | |
318 | Len -= I; | |
319 | return true; | |
320 | } | |
321 | ||
322 | // Wait for some data.. | |
323 | if (WaitFd(ServerFd,false,TimeOut) == false) | |
ce0ae89a AL |
324 | { |
325 | Close(); | |
30b30ec1 | 326 | return _error->Error("Connection timeout"); |
ce0ae89a | 327 | } |
30b30ec1 AL |
328 | |
329 | // Suck it back | |
330 | int Res = read(ServerFd,Buffer,sizeof(Buffer) - Len); | |
331 | if (Res <= 0) | |
ce0ae89a AL |
332 | { |
333 | Close(); | |
30b30ec1 | 334 | return _error->Errno("read","Read error"); |
ce0ae89a | 335 | } |
30b30ec1 AL |
336 | Len += Res; |
337 | } | |
338 | ||
339 | return _error->Error("A response overflowed the buffer."); | |
340 | } | |
341 | /*}}}*/ | |
342 | // FTPConn::ReadResp - Read a full response from the server /*{{{*/ | |
343 | // --------------------------------------------------------------------- | |
344 | /* This reads a reply code from the server, it handles both p */ | |
345 | bool FTPConn::ReadResp(unsigned int &Ret,string &Text) | |
346 | { | |
347 | // Grab the first line of the response | |
348 | string Msg; | |
349 | if (ReadLine(Msg) == false) | |
350 | return false; | |
351 | ||
352 | // Get the ID code | |
353 | char *End; | |
354 | Ret = strtol(Msg.c_str(),&End,10); | |
355 | if (End - Msg.c_str() != 3) | |
356 | return _error->Error("Protocol corruption"); | |
357 | ||
358 | // All done ? | |
359 | Text = Msg.c_str()+4; | |
360 | if (*End == ' ') | |
361 | { | |
362 | if (Debug == true) | |
ce0ae89a | 363 | cerr << "<- '" << QuoteString(Text,"") << "'" << endl; |
30b30ec1 AL |
364 | return true; |
365 | } | |
366 | ||
367 | if (*End != '-') | |
368 | return _error->Error("Protocol corruption"); | |
369 | ||
370 | /* Okay, here we do the continued message trick. This is foolish, but | |
371 | proftpd follows the protocol as specified and wu-ftpd doesn't, so | |
372 | we filter. I wonder how many clients break if you use proftpd and | |
373 | put a '- in the 3rd spot in the message? */ | |
374 | char Leader[4]; | |
375 | strncpy(Leader,Msg.c_str(),3); | |
376 | Leader[3] = 0; | |
377 | while (ReadLine(Msg) == true) | |
378 | { | |
379 | // Short, it must be using RFC continuation.. | |
380 | if (Msg.length() < 4) | |
381 | { | |
382 | Text += Msg; | |
383 | continue; | |
384 | } | |
385 | ||
386 | // Oops, finished | |
387 | if (strncmp(Msg.c_str(),Leader,3) == 0 && Msg[3] == ' ') | |
388 | { | |
389 | Text += Msg.c_str()+4; | |
390 | break; | |
391 | } | |
392 | ||
393 | // This message has the wu-ftpd style reply code prefixed | |
394 | if (strncmp(Msg.c_str(),Leader,3) == 0 && Msg[3] == '-') | |
395 | { | |
396 | Text += Msg.c_str()+4; | |
397 | continue; | |
398 | } | |
399 | ||
400 | // Must be RFC style prefixing | |
401 | Text += Msg; | |
402 | } | |
403 | ||
404 | if (Debug == true && _error->PendingError() == false) | |
ce0ae89a | 405 | cerr << "<- '" << QuoteString(Text,"") << "'" << endl; |
30b30ec1 AL |
406 | |
407 | return !_error->PendingError(); | |
408 | } | |
409 | /*}}}*/ | |
410 | // FTPConn::WriteMsg - Send a message to the server /*{{{*/ | |
411 | // --------------------------------------------------------------------- | |
412 | /* Simple printf like function.. */ | |
413 | bool FTPConn::WriteMsg(unsigned int &Ret,string &Text,const char *Fmt,...) | |
414 | { | |
415 | va_list args; | |
416 | va_start(args,Fmt); | |
417 | ||
418 | // sprintf the description | |
419 | char S[400]; | |
420 | vsnprintf(S,sizeof(S) - 4,Fmt,args); | |
421 | strcat(S,"\r\n"); | |
422 | ||
423 | if (Debug == true) | |
ce0ae89a | 424 | cerr << "-> '" << QuoteString(S,"") << "'" << endl; |
30b30ec1 AL |
425 | |
426 | // Send it off | |
427 | unsigned long Len = strlen(S); | |
428 | unsigned long Start = 0; | |
429 | while (Len != 0) | |
430 | { | |
431 | if (WaitFd(ServerFd,true,TimeOut) == false) | |
ce0ae89a AL |
432 | { |
433 | Close(); | |
30b30ec1 | 434 | return _error->Error("Connection timeout"); |
ce0ae89a | 435 | } |
30b30ec1 AL |
436 | |
437 | int Res = write(ServerFd,S + Start,Len); | |
438 | if (Res <= 0) | |
ce0ae89a AL |
439 | { |
440 | Close(); | |
30b30ec1 | 441 | return _error->Errno("write","Write Error"); |
ce0ae89a AL |
442 | } |
443 | ||
30b30ec1 AL |
444 | Len -= Res; |
445 | Start += Res; | |
446 | } | |
447 | ||
448 | return ReadResp(Ret,Text); | |
449 | } | |
450 | /*}}}*/ | |
451 | // FTPConn::GoPasv - Enter Passive mode /*{{{*/ | |
452 | // --------------------------------------------------------------------- | |
453 | /* Try to enter passive mode, the return code does not indicate if passive | |
454 | mode could or could not be established, only if there was a fatal error. | |
455 | Borrowed mostly from lftp. We have to enter passive mode every time | |
456 | we make a data connection :| */ | |
457 | bool FTPConn::GoPasv() | |
458 | { | |
459 | // Try to enable pasv mode | |
460 | unsigned int Tag; | |
461 | string Msg; | |
462 | if (WriteMsg(Tag,Msg,"PASV") == false) | |
463 | return false; | |
464 | ||
465 | // Unsupported function | |
466 | string::size_type Pos = Msg.find('('); | |
467 | if (Tag >= 400 || Pos == string::npos) | |
468 | { | |
469 | memset(&PasvAddr,0,sizeof(PasvAddr)); | |
470 | return true; | |
471 | } | |
472 | ||
473 | // Scan it | |
474 | unsigned a0,a1,a2,a3,p0,p1; | |
475 | if (sscanf(Msg.c_str() + Pos,"(%u,%u,%u,%u,%u,%u)",&a0,&a1,&a2,&a3,&p0,&p1) != 6) | |
476 | { | |
477 | memset(&PasvAddr,0,sizeof(PasvAddr)); | |
478 | return true; | |
479 | } | |
480 | ||
481 | // lftp used this horrid byte order manipulation.. Ik. | |
482 | PasvAddr.sin_family = AF_INET; | |
483 | unsigned char *a; | |
484 | unsigned char *p; | |
485 | a = (unsigned char *)&PasvAddr.sin_addr; | |
486 | p = (unsigned char *)&PasvAddr.sin_port; | |
487 | ||
488 | // Some evil servers return 0 to mean their addr | |
489 | if (a0 == 0 && a1 == 0 && a2 == 0 && a3 == 0) | |
490 | { | |
491 | PasvAddr.sin_addr = Peer.sin_addr; | |
492 | } | |
493 | else | |
494 | { | |
495 | a[0] = a0; | |
496 | a[1] = a1; | |
497 | a[2] = a2; | |
498 | a[3] = a3; | |
499 | } | |
500 | ||
501 | p[0] = p0; | |
502 | p[1] = p1; | |
503 | ||
504 | return true; | |
505 | } | |
506 | /*}}}*/ | |
507 | // FTPConn::Size - Return the size of a file /*{{{*/ | |
508 | // --------------------------------------------------------------------- | |
509 | /* Grab the file size from the server, 0 means no size or empty file */ | |
ce0ae89a | 510 | bool FTPConn::Size(const char *Path,unsigned long &Size) |
30b30ec1 AL |
511 | { |
512 | // Query the size | |
513 | unsigned int Tag; | |
514 | string Msg; | |
ce0ae89a | 515 | Size = 0; |
30b30ec1 AL |
516 | if (WriteMsg(Tag,Msg,"SIZE %s",Path) == false) |
517 | return false; | |
518 | ||
519 | char *End; | |
ce0ae89a | 520 | Size = strtol(Msg.c_str(),&End,10); |
30b30ec1 | 521 | if (Tag >= 400 || End == Msg.c_str()) |
ce0ae89a AL |
522 | Size = 0; |
523 | return true; | |
30b30ec1 AL |
524 | } |
525 | /*}}}*/ | |
526 | // FTPConn::ModTime - Return the modification time of the file /*{{{*/ | |
527 | // --------------------------------------------------------------------- | |
528 | /* Like Size no error is returned if the command is not supported. If the | |
529 | command fails then time is set to the current time of day to fool | |
530 | date checks. */ | |
531 | bool FTPConn::ModTime(const char *Path, time_t &Time) | |
532 | { | |
533 | Time = time(&Time); | |
534 | ||
535 | // Query the mod time | |
536 | unsigned int Tag; | |
537 | string Msg; | |
538 | if (WriteMsg(Tag,Msg,"MDTM %s",Path) == false) | |
539 | return false; | |
540 | if (Tag >= 400 || Msg.empty() == true || isdigit(Msg[0]) == 0) | |
541 | return true; | |
542 | ||
543 | // Parse it | |
544 | struct tm tm; | |
545 | memset(&tm,0,sizeof(tm)); | |
546 | if (sscanf(Msg.c_str(),"%4d%2d%2d%2d%2d%2d",&tm.tm_year,&tm.tm_mon, | |
547 | &tm.tm_mday,&tm.tm_hour,&tm.tm_min,&tm.tm_sec) != 6) | |
548 | return true; | |
549 | ||
550 | tm.tm_year -= 1900; | |
551 | tm.tm_mon--; | |
552 | ||
553 | /* We use timegm from the GNU C library, libapt-pkg will provide this | |
554 | symbol if it does not exist */ | |
555 | Time = timegm(&tm); | |
556 | return true; | |
557 | } | |
558 | /*}}}*/ | |
559 | // FTPConn::CreateDataFd - Get a data connection /*{{{*/ | |
560 | // --------------------------------------------------------------------- | |
561 | /* Create the data connection. Call FinalizeDataFd after this though.. */ | |
562 | bool FTPConn::CreateDataFd() | |
563 | { | |
564 | close(DataFd); | |
565 | DataFd = -1; | |
566 | ||
567 | // Attempt to enter passive mode. | |
568 | if (TryPassive == true) | |
569 | { | |
570 | if (GoPasv() == false) | |
571 | return false; | |
572 | ||
573 | // Oops, didn't work out, don't bother trying again. | |
574 | if (PasvAddr.sin_port == 0) | |
575 | TryPassive = false; | |
576 | } | |
577 | ||
578 | // Passive mode? | |
579 | if (PasvAddr.sin_port != 0) | |
580 | { | |
581 | // Get a socket | |
582 | if ((DataFd = socket(AF_INET,SOCK_STREAM,0)) < 0) | |
583 | return _error->Errno("socket","Could not create a socket"); | |
584 | ||
585 | // Connect to the server | |
586 | SetNonBlock(DataFd,true); | |
587 | if (connect(DataFd,(sockaddr *)&PasvAddr,sizeof(PasvAddr)) < 0 && | |
588 | errno != EINPROGRESS) | |
589 | return _error->Errno("socket","Could not create a socket"); | |
590 | ||
591 | /* This implements a timeout for connect by opening the connection | |
592 | nonblocking */ | |
593 | if (WaitFd(ServerFd,true,TimeOut) == false) | |
594 | return _error->Error("Could not connect data socket, connection timed out"); | |
595 | unsigned int Err; | |
596 | unsigned int Len = sizeof(Err); | |
597 | if (getsockopt(ServerFd,SOL_SOCKET,SO_ERROR,&Err,&Len) != 0) | |
598 | return _error->Errno("getsockopt","Failed"); | |
599 | if (Err != 0) | |
600 | return _error->Error("Could not connect."); | |
601 | ||
602 | return true; | |
603 | } | |
604 | ||
605 | // Port mode :< | |
606 | if (DataListenFd == -1) | |
607 | { | |
608 | // Get a socket | |
609 | if ((DataListenFd = socket(AF_INET,SOCK_STREAM,0)) < 0) | |
610 | return _error->Errno("socket","Could not create a socket"); | |
611 | ||
612 | // Bind and listen | |
613 | sockaddr_in Addr; | |
614 | memset(&Addr,0,sizeof(Addr)); | |
615 | if (bind(DataListenFd,(sockaddr *)&Addr,sizeof(Addr)) < 0) | |
616 | return _error->Errno("bind","Could not bind a socket"); | |
617 | if (listen(DataListenFd,1) < 0) | |
618 | return _error->Errno("listen","Could not listen on the socket"); | |
619 | SetNonBlock(DataListenFd,true); | |
620 | } | |
621 | ||
622 | // Determine the name to send to the remote | |
623 | sockaddr_in Addr; | |
624 | sockaddr_in Addr2; | |
625 | socklen_t Jnk = sizeof(Addr); | |
626 | if (getsockname(DataListenFd,(sockaddr *)&Addr,&Jnk) < 0) | |
627 | return _error->Errno("getsockname","Could not determine the socket's name"); | |
628 | Jnk = sizeof(Addr2); | |
629 | if (getsockname(ServerFd,(sockaddr *)&Addr2,&Jnk) < 0) | |
630 | return _error->Errno("getsockname","Could not determine the socket's name"); | |
631 | ||
632 | // This bit ripped from qftp | |
633 | unsigned long badr = ntohl(*(unsigned long *)&Addr2.sin_addr); | |
634 | unsigned long bp = ntohs(Addr.sin_port); | |
635 | ||
636 | // Send the port command | |
637 | unsigned int Tag; | |
638 | string Msg; | |
639 | if (WriteMsg(Tag,Msg,"PORT %d,%d,%d,%d,%d,%d", | |
640 | (int) (badr >> 24) & 0xff, (int) (badr >> 16) & 0xff, | |
641 | (int) (badr >> 8) & 0xff, (int) badr & 0xff, | |
642 | (int) (bp >> 8) & 0xff, (int) bp & 0xff) == false) | |
643 | return false; | |
644 | if (Tag >= 400) | |
645 | return _error->Error("Unable to send port command"); | |
646 | ||
647 | return true; | |
648 | } | |
649 | /*}}}*/ | |
650 | // FTPConn::Finalize - Complete the Data connection /*{{{*/ | |
651 | // --------------------------------------------------------------------- | |
652 | /* If the connection is in port mode this waits for the other end to hook | |
653 | up to us. */ | |
654 | bool FTPConn::Finalize() | |
655 | { | |
656 | // Passive mode? Do nothing | |
657 | if (PasvAddr.sin_port != 0) | |
658 | return true; | |
659 | ||
660 | // Close any old socket.. | |
661 | close(DataFd); | |
662 | DataFd = -1; | |
663 | ||
664 | // Wait for someone to connect.. | |
665 | if (WaitFd(DataListenFd,false,TimeOut) == false) | |
666 | return _error->Error("Data socket connect timed out"); | |
667 | ||
668 | // Accept the connection | |
669 | struct sockaddr_in Addr; | |
670 | socklen_t Len = sizeof(Addr); | |
671 | DataFd = accept(DataListenFd,(struct sockaddr *)&Addr,&Len); | |
672 | if (DataFd < 0) | |
673 | return _error->Errno("accept","Unable to accept connection"); | |
674 | ||
675 | return true; | |
676 | } | |
677 | /*}}}*/ | |
678 | // FTPConn::Get - Get a file /*{{{*/ | |
679 | // --------------------------------------------------------------------- | |
680 | /* This opens a data connection, sends REST and RETR and then | |
681 | transfers the file over. */ | |
ce0ae89a AL |
682 | bool FTPConn::Get(const char *Path,FileFd &To,unsigned long Resume, |
683 | MD5Summation &MD5,bool &Missing) | |
30b30ec1 | 684 | { |
ce0ae89a | 685 | Missing = false; |
30b30ec1 AL |
686 | if (CreateDataFd() == false) |
687 | return false; | |
688 | ||
689 | unsigned int Tag; | |
ce0ae89a | 690 | string Msg; |
30b30ec1 AL |
691 | if (Resume != 0) |
692 | { | |
693 | if (WriteMsg(Tag,Msg,"REST %u",Resume) == false) | |
694 | return false; | |
695 | if (Tag >= 400) | |
696 | Resume = 0; | |
697 | } | |
698 | ||
699 | if (To.Truncate(Resume) == false) | |
700 | return false; | |
701 | ||
702 | // Send the get command | |
703 | if (WriteMsg(Tag,Msg,"RETR %s",Path) == false) | |
704 | return false; | |
705 | ||
706 | if (Tag >= 400) | |
ce0ae89a AL |
707 | { |
708 | if (Tag == 550) | |
709 | Missing = true; | |
30b30ec1 | 710 | return _error->Error("Unable to fetch file, server said '%s'",Msg.c_str()); |
ce0ae89a | 711 | } |
30b30ec1 AL |
712 | |
713 | // Finish off the data connection | |
714 | if (Finalize() == false) | |
715 | return false; | |
716 | ||
717 | // Copy loop | |
718 | unsigned char Buffer[4096]; | |
719 | while (1) | |
720 | { | |
721 | // Wait for some data.. | |
722 | if (WaitFd(DataFd,false,TimeOut) == false) | |
723 | return _error->Error("Data socket connect timed out"); | |
724 | ||
725 | // Read the data.. | |
726 | int Res = read(DataFd,Buffer,sizeof(Buffer)); | |
727 | if (Res == 0) | |
728 | break; | |
729 | if (Res < 0) | |
730 | { | |
731 | if (errno == EAGAIN) | |
732 | continue; | |
733 | break; | |
734 | } | |
735 | ||
736 | if (To.Write(Buffer,Res) == false) | |
737 | return false; | |
738 | } | |
739 | ||
740 | // All done | |
741 | close(DataFd); | |
742 | DataFd = -1; | |
743 | ||
744 | // Read the closing message from the server | |
745 | if (ReadResp(Tag,Msg) == false) | |
746 | return false; | |
747 | if (Tag >= 400) | |
748 | return _error->Error("Data transfer failed, server said '%s'",Msg.c_str()); | |
749 | return true; | |
750 | } | |
751 | /*}}}*/ | |
752 | ||
ce0ae89a AL |
753 | // FtpMethod::FtpMethod - Constructor /*{{{*/ |
754 | // --------------------------------------------------------------------- | |
755 | /* */ | |
756 | FtpMethod::FtpMethod() : pkgAcqMethod("1.0",SendConfig) | |
30b30ec1 | 757 | { |
ce0ae89a AL |
758 | signal(SIGTERM,SigTerm); |
759 | signal(SIGINT,SigTerm); | |
30b30ec1 | 760 | |
ce0ae89a AL |
761 | Server = 0; |
762 | FailFd = -1; | |
763 | } | |
764 | /*}}}*/ | |
765 | // FtpMethod::SigTerm - Handle a fatal signal /*{{{*/ | |
766 | // --------------------------------------------------------------------- | |
767 | /* This closes and timestamps the open file. This is neccessary to get | |
768 | resume behavoir on user abort */ | |
769 | void FtpMethod::SigTerm(int) | |
770 | { | |
771 | if (FailFd == -1) | |
772 | exit(100); | |
773 | close(FailFd); | |
774 | ||
775 | // Timestamp | |
776 | struct utimbuf UBuf; | |
777 | UBuf.actime = FailTime; | |
778 | UBuf.modtime = FailTime; | |
779 | utime(FailFile.c_str(),&UBuf); | |
780 | ||
781 | exit(100); | |
782 | } | |
783 | /*}}}*/ | |
784 | // FtpMethod::Configuration - Handle a configuration message /*{{{*/ | |
785 | // --------------------------------------------------------------------- | |
786 | /* We stash the desired pipeline depth */ | |
787 | bool FtpMethod::Configuration(string Message) | |
788 | { | |
789 | if (pkgAcqMethod::Configuration(Message) == false) | |
790 | return false; | |
791 | ||
792 | TimeOut = _config->FindI("Acquire::Ftp::Timeout",TimeOut); | |
793 | return true; | |
794 | } | |
795 | /*}}}*/ | |
796 | // FtpMethod::Fetch - Fetch a file /*{{{*/ | |
797 | // --------------------------------------------------------------------- | |
798 | /* */ | |
799 | bool FtpMethod::Fetch(FetchItem *Itm) | |
800 | { | |
801 | URI Get = Itm->Uri; | |
802 | const char *File = Get.Path.c_str(); | |
803 | FetchResult Res; | |
804 | Res.Filename = Itm->DestFile; | |
805 | Res.IMSHit = false; | |
806 | ||
807 | // Connect to the server | |
808 | if (Server == 0 || Server->Comp(Get) == false) | |
30b30ec1 | 809 | { |
ce0ae89a AL |
810 | delete Server; |
811 | Server = new FTPConn(Get); | |
812 | } | |
813 | ||
814 | // Could not connect is a transient error.. | |
815 | if (Server->Open(this) == false) | |
816 | { | |
817 | Fail(true); | |
818 | return true; | |
819 | } | |
30b30ec1 | 820 | |
ce0ae89a AL |
821 | // Get the files information |
822 | unsigned long Size; | |
823 | if (Server->Size(File,Size) == false || | |
824 | Server->ModTime(File,FailTime) == false) | |
825 | { | |
826 | Fail(true); | |
827 | return true; | |
828 | } | |
829 | Res.Size = Size; | |
830 | ||
831 | // See if it is an IMS hit | |
832 | if (Itm->LastModified == FailTime) | |
833 | { | |
834 | Res.Size = 0; | |
835 | Res.IMSHit = true; | |
836 | URIDone(Res); | |
837 | return true; | |
838 | } | |
839 | ||
840 | // See if the file exists | |
841 | struct stat Buf; | |
842 | if (stat(Itm->DestFile.c_str(),&Buf) == 0) | |
843 | { | |
844 | if (Size == (unsigned)Buf.st_size && FailTime == Buf.st_mtime) | |
30b30ec1 | 845 | { |
ce0ae89a AL |
846 | Res.Size = Buf.st_size; |
847 | Res.LastModified = Buf.st_mtime; | |
848 | URIDone(Res); | |
849 | return true; | |
30b30ec1 AL |
850 | } |
851 | ||
ce0ae89a AL |
852 | // Resume? |
853 | if (FailTime == Buf.st_mtime && Size < (unsigned)Buf.st_size) | |
854 | Res.ResumePoint = Buf.st_size; | |
855 | } | |
856 | ||
857 | // Open the file | |
858 | MD5Summation MD5; | |
859 | { | |
860 | FileFd Fd(Itm->DestFile,FileFd::WriteAny); | |
861 | if (_error->PendingError() == true) | |
862 | return false; | |
863 | ||
864 | URIStart(Res); | |
865 | ||
866 | FailFile = Itm->DestFile; | |
867 | FailFile.c_str(); // Make sure we dont do a malloc in the signal handler | |
868 | FailFd = Fd.Fd(); | |
869 | ||
870 | bool Missing; | |
871 | if (Server->Get(File,Fd,Res.ResumePoint,MD5,Missing) == false) | |
30b30ec1 | 872 | { |
ce0ae89a AL |
873 | // If the file is missing we hard fail otherwise transient fail |
874 | if (Missing == true) | |
875 | return false; | |
876 | Fail(true); | |
877 | return true; | |
30b30ec1 | 878 | } |
ce0ae89a AL |
879 | |
880 | Res.Size = Fd.Size(); | |
30b30ec1 AL |
881 | } |
882 | ||
ce0ae89a AL |
883 | Res.LastModified = FailTime; |
884 | Res.MD5Sum = MD5.Result(); | |
885 | ||
886 | // Timestamp | |
887 | struct utimbuf UBuf; | |
888 | time(&UBuf.actime); | |
889 | UBuf.actime = FailTime; | |
890 | UBuf.modtime = FailTime; | |
891 | utime(Queue->DestFile.c_str(),&UBuf); | |
892 | FailFd = -1; | |
893 | ||
894 | URIDone(Res); | |
895 | ||
896 | return true; | |
897 | } | |
898 | /*}}}*/ | |
899 | ||
900 | int main() | |
901 | { | |
902 | FtpMethod Mth; | |
903 | ||
904 | return Mth.Run(); | |
30b30ec1 | 905 | } |