citadel/modules/pop3client/serv_pop3client.c

   1 /*
   2  * Consolidate mail from remote POP3 accounts.
   3  *
   4  * Copyright (c) 2007-2009 by the citadel.org team
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <stdlib.h>
  22 #include <unistd.h>
  23 #include <stdio.h>
  24
  25 #if TIME_WITH_SYS_TIME
  26 # include <sys/time.h>
  27 # include <time.h>
  28 #else
  29 # if HAVE_SYS_TIME_H
  30 #  include <sys/time.h>
  31 # else
  32 #  include <time.h>
  33 # endif
  34 #endif
  35
  36 #include <ctype.h>
  37 #include <string.h>
  38 #include <errno.h>
  39 #include <sys/types.h>
  40 #include <sys/stat.h>
  41 #include <libcitadel.h>
  42 #include "citadel.h"
  43 #include "server.h"
  44 #include "citserver.h"
  45 #include "support.h"
  46 #include "config.h"
  47 #include "ctdl_module.h"
  48 #include "clientsocket.h"
  49 #include "msgbase.h"
  50 #include "internet_addressing.h"
  51 #include "database.h"
  52 #include "citadel_dirs.h"
  53 #include "event_client.h"
  54
  55
  56 struct CitContext pop3_client_CC;
  57
  58 citthread_mutex_t POP3QueueMutex; /* locks the access to the following vars: */
  59 HashList *POP3QueueRooms = NULL; /* rss_room_counter */
  60 HashList *POP3FetchUrls = NULL; /* -> rss_aggregator; ->RefCount access to be locked too. */
  61
  62 typedef struct __pop3_room_counter {
  63         int count;
  64         long QRnumber;
  65 }pop3_room_counter;
  66
  67 typedef enum ePOP3_C_States {
  68         ReadGreeting,
  69         GetUserState,
  70         GetPassState,
  71         GetListCommandState,
  72         GetListOneLine,
  73         GetOneMessageIDState,
  74         ReadMessageBodyFollowing,
  75         ReadMessageBody,
  76         GetDeleteState,
  77         ReadQuitState,
  78         POP3C_MaxRead
  79 }ePOP3_C_States;
  80
  81
  82 typedef struct _FetchItem {
  83         long MSGID;
  84         long MSGSize;
  85         StrBuf *MsgUIDL;
  86         StrBuf *MsgUID;
  87         int NeedFetch;
  88         struct CtdlMessage *Msg;
  89 } FetchItem;
  90
  91 void HfreeFetchItem(void *vItem)
  92 {
  93         FetchItem *Item = (FetchItem*) vItem;
  94         FreeStrBuf(&Item->MsgUIDL);
  95         FreeStrBuf(&Item->MsgUID);
  96         free(Item);
  97 }
  98
  99 typedef struct __pop3aggr {
 100         AsyncIO          IO;
 101
 102         long n;
 103         long RefCount;
 104 ///     ParsedURL *Pop3Host;
 105         DNSQueryParts HostLookup;
 106
 107 //      StrBuf          *rooms;
 108         long             QRnumber;
 109         HashList        *OtherQRnumbers;
 110
 111         StrBuf          *Url;
 112 ///     StrBuf *pop3host; -> URL
 113         StrBuf *pop3user;
 114         StrBuf *pop3pass;
 115         StrBuf *RoomName; // TODO: fill me
 116         int keep;
 117         time_t interval;
 118         ePOP3_C_States State;
 119         HashList *MsgNumbers;
 120         HashPos *Pos;
 121         FetchItem *CurrMsg;
 122 } pop3aggr;
 123
 124 void DeletePOP3Aggregator(void *vptr)
 125 {
 126         pop3aggr *ptr = vptr;
 127         DeleteHashPos(&ptr->Pos);
 128         DeleteHash(&ptr->MsgNumbers);
 129 //      FreeStrBuf(&ptr->rooms);
 130         FreeStrBuf(&ptr->pop3user);
 131         FreeStrBuf(&ptr->pop3pass);
 132         FreeStrBuf(&ptr->RoomName);
 133         FreeURL(&ptr->IO.ConnectMe);
 134         FreeStrBuf(&ptr->Url);
 135         FreeStrBuf(&ptr->IO.IOBuf);
 136         FreeStrBuf(&ptr->IO.SendBuf.Buf);
 137         FreeStrBuf(&ptr->IO.RecvBuf.Buf);
 138         DeleteAsyncMsg(&ptr->IO.ReadMsg);
 139         free(ptr);
 140 }
 141
 142
 143 typedef eNextState(*Pop3ClientHandler)(pop3aggr* RecvMsg);
 144
 145 eNextState POP3_C_Shutdown(AsyncIO *IO);
 146 eNextState POP3_C_Timeout(AsyncIO *IO);
 147 eNextState POP3_C_ConnFail(AsyncIO *IO);
 148 eNextState POP3_C_DispatchReadDone(AsyncIO *IO);
 149 eNextState POP3_C_DispatchWriteDone(AsyncIO *IO);
 150 eNextState POP3_C_Terminate(AsyncIO *IO);
 151 eReadState POP3_C_ReadServerStatus(AsyncIO *IO);
 152 eNextState POP3_C_ReAttachToFetchMessages(AsyncIO *IO);
 153
 154 eNextState FinalizePOP3AggrRun(AsyncIO *IO)
 155 {
 156         HashPos  *It;
 157         pop3aggr *cptr = (pop3aggr *)IO->Data;
 158
 159         syslog(LOG_DEBUG, "Terminating Aggregator; bye.\n");
 160
 161         It = GetNewHashPos(POP3FetchUrls, 0);
 162         citthread_mutex_lock(&POP3QueueMutex);
 163         {
 164                 GetHashPosFromKey(POP3FetchUrls, SKEY(cptr->Url), It);
 165                 DeleteEntryFromHash(POP3FetchUrls, It);
 166         }
 167         citthread_mutex_unlock(&POP3QueueMutex);
 168         DeleteHashPos(&It);
 169         return eAbort;
 170 }
 171
 172 eNextState FailAggregationRun(AsyncIO *IO)
 173 {
 174         return eAbort;
 175 }
 176
 177 #define POP3C_DBG_SEND() syslog(LOG_DEBUG, "POP3 client[%ld]: > %s\n", RecvMsg->n, ChrPtr(RecvMsg->IO.SendBuf.Buf))
 178 #define POP3C_DBG_READ() syslog(LOG_DEBUG, "POP3 client[%ld]: < %s\n", RecvMsg->n, ChrPtr(RecvMsg->IO.IOBuf))
 179 #define POP3C_OK (strncasecmp(ChrPtr(RecvMsg->IO.IOBuf), "+OK", 3) == 0)
 180
 181 eNextState POP3C_ReadGreeting(pop3aggr *RecvMsg)
 182 {
 183         POP3C_DBG_READ();
 184         /* Read the server greeting */
 185         if (!POP3C_OK) return eTerminateConnection;
 186         else return eSendReply;
 187 }
 188
 189
 190 eNextState POP3C_SendUser(pop3aggr *RecvMsg)
 191 {
 192         /* Identify ourselves.  NOTE: we have to append a CR to each command.  The LF will
 193          * automatically be appended by sock_puts().  Believe it or not, leaving out the CR
 194          * will cause problems if the server happens to be Exchange, which is so b0rken it
 195          * actually barfs on LF-terminated newlines.
 196          */
 197         StrBufPrintf(RecvMsg->IO.SendBuf.Buf,
 198                      "USER %s\r\n", ChrPtr(RecvMsg->pop3user));
 199         POP3C_DBG_SEND();
 200         return eReadMessage;
 201 }
 202
 203 eNextState POP3C_GetUserState(pop3aggr *RecvMsg)
 204 {
 205         POP3C_DBG_READ();
 206         if (!POP3C_OK) return eTerminateConnection;
 207         else return eSendReply;
 208 }
 209
 210 eNextState POP3C_SendPassword(pop3aggr *RecvMsg)
 211 {
 212         /* Password */
 213         StrBufPrintf(RecvMsg->IO.SendBuf.Buf,
 214                      "PASS %s\r\n", ChrPtr(RecvMsg->pop3pass));
 215         syslog(LOG_DEBUG, "<PASS <password>\n");
 216 //      POP3C_DBG_SEND();
 217         return eReadMessage;
 218 }
 219
 220 eNextState POP3C_GetPassState(pop3aggr *RecvMsg)
 221 {
 222         POP3C_DBG_READ();
 223         if (!POP3C_OK) return eTerminateConnection;
 224         else return eSendReply;
 225 }
 226
 227 eNextState POP3C_SendListCommand(pop3aggr *RecvMsg)
 228 {
 229         /* Get the list of messages */
 230         StrBufPlain(RecvMsg->IO.SendBuf.Buf, HKEY("LIST\r\n"));
 231         POP3C_DBG_SEND();
 232         return eReadMessage;
 233 }
 234
 235 eNextState POP3C_GetListCommandState(pop3aggr *RecvMsg)
 236 {
 237         POP3C_DBG_READ();
 238         if (!POP3C_OK) return eTerminateConnection;
 239         RecvMsg->MsgNumbers = NewHash(1, NULL);
 240         RecvMsg->State++;
 241         return eReadMore;
 242 }
 243
 244
 245 eNextState POP3C_GetListOneLine(pop3aggr *RecvMsg)
 246 {
 247 #if 0
 248         int rc;
 249 #endif
 250         const char *pch;
 251         FetchItem *OneMsg = NULL;
 252         POP3C_DBG_READ();
 253
 254         if ((StrLength(RecvMsg->IO.IOBuf) == 1) &&
 255             (ChrPtr(RecvMsg->IO.IOBuf)[0] == '.'))
 256         {
 257                 if (GetCount(RecvMsg->MsgNumbers) == 0)
 258                 {
 259                         ////    RecvMsg->Sate = ReadQuitState;
 260                 }
 261                 else
 262                 {
 263                         RecvMsg->Pos = GetNewHashPos(RecvMsg->MsgNumbers, 0);
 264                 }
 265                 return eSendReply;
 266
 267         }
 268         OneMsg = (FetchItem*) malloc(sizeof(FetchItem));
 269         memset(OneMsg, 0, sizeof(FetchItem));
 270         OneMsg->MSGID = atol(ChrPtr(RecvMsg->IO.IOBuf));
 271
 272         pch = strchr(ChrPtr(RecvMsg->IO.IOBuf), ' ');
 273         if (pch != NULL)
 274         {
 275                 OneMsg->MSGSize = atol(pch + 1);
 276         }
 277 #if 0
 278         rc = TestValidateHash(RecvMsg->MsgNumbers);
 279         if (rc != 0)
 280                 syslog(LOG_DEBUG, "Hash Invalid: %d\n", rc);
 281 #endif
 282
 283         Put(RecvMsg->MsgNumbers, LKEY(OneMsg->MSGID), OneMsg, HfreeFetchItem);
 284 #if 0
 285         rc = TestValidateHash(RecvMsg->MsgNumbers);
 286         if (rc != 0)
 287                 syslog(LOG_DEBUG, "Hash Invalid: %d\n", rc);
 288 #endif
 289         //RecvMsg->State --; /* read next Line */
 290         return eReadMore;
 291 }
 292
 293 eNextState POP3_FetchNetworkUsetableEntry(AsyncIO *IO)
 294 {
 295         long HKLen;
 296         const char *HKey;
 297         void *vData;
 298         struct cdbdata *cdbut;
 299         pop3aggr *RecvMsg = (pop3aggr *) IO->Data;
 300
 301         if(GetNextHashPos(RecvMsg->MsgNumbers, RecvMsg->Pos, &HKLen, &HKey, &vData))
 302         {
 303                 struct UseTable ut;
 304
 305                 RecvMsg->CurrMsg = (FetchItem*) vData;
 306                 syslog(LOG_DEBUG, "CHECKING: whether %s has already been seen: ", ChrPtr(RecvMsg->CurrMsg->MsgUID));
 307                 /* Find out if we've already seen this item */
 308                 safestrncpy(ut.ut_msgid,
 309                             ChrPtr(RecvMsg->CurrMsg->MsgUID),
 310                             sizeof(ut.ut_msgid));
 311                 ut.ut_timestamp = time(NULL);/// TODO: libev timestamp!
 312
 313                 cdbut = cdb_fetch(CDB_USETABLE, SKEY(RecvMsg->CurrMsg->MsgUID));
 314                 if (cdbut != NULL) {
 315                         /* Item has already been seen */
 316                         syslog(LOG_DEBUG, "YES\n");
 317                         cdb_free(cdbut);
 318
 319                         /* rewrite the record anyway, to update the timestamp */
 320                         cdb_store(CDB_USETABLE,
 321                                   SKEY(RecvMsg->CurrMsg->MsgUID),
 322                                   &ut, sizeof(struct UseTable) );
 323                         RecvMsg->CurrMsg->NeedFetch = 1; ////TODO0;
 324                 }
 325                 else
 326                 {
 327                         syslog(LOG_DEBUG, "NO\n");
 328                         RecvMsg->CurrMsg->NeedFetch = 1;
 329                 }
 330                 return NextDBOperation(&RecvMsg->IO, POP3_FetchNetworkUsetableEntry);
 331         }
 332         else
 333         {
 334                 /* ok, now we know them all, continue with reading the actual messages. */
 335                 DeleteHashPos(&RecvMsg->Pos);
 336
 337                 return QueueEventContext(IO, POP3_C_ReAttachToFetchMessages);
 338         }
 339 }
 340
 341 eNextState POP3C_GetOneMessagID(pop3aggr *RecvMsg)
 342 {
 343         long HKLen;
 344         const char *HKey;
 345         void *vData;
 346
 347 #if 0
 348         int rc;
 349         rc = TestValidateHash(RecvMsg->MsgNumbers);
 350         if (rc != 0)
 351                 syslog(LOG_DEBUG, "Hash Invalid: %d\n", rc);
 352 #endif
 353         if(GetNextHashPos(RecvMsg->MsgNumbers, RecvMsg->Pos, &HKLen, &HKey, &vData))
 354         {
 355                 RecvMsg->CurrMsg = (FetchItem*) vData;
 356                 /* Find out the UIDL of the message, to determine whether we've already downloaded it */
 357                 StrBufPrintf(RecvMsg->IO.SendBuf.Buf,
 358                              "UIDL %ld\r\n", RecvMsg->CurrMsg->MSGID);
 359                 POP3C_DBG_SEND();
 360         }
 361         else
 362         {
 363             RecvMsg->State++;
 364                 DeleteHashPos(&RecvMsg->Pos);
 365                 /// done receiving uidls.. start looking them up now.
 366                 RecvMsg->Pos = GetNewHashPos(RecvMsg->MsgNumbers, 0);
 367                 return QueueDBOperation(&RecvMsg->IO, POP3_FetchNetworkUsetableEntry);
 368         }
 369         return eReadMore; /* TODO */
 370 }
 371
 372 eNextState POP3C_GetOneMessageIDState(pop3aggr *RecvMsg)
 373 {
 374 #if 0
 375         int rc;
 376         rc = TestValidateHash(RecvMsg->MsgNumbers);
 377         if (rc != 0)
 378                 syslog(LOG_DEBUG, "Hash Invalid: %d\n", rc);
 379 #endif
 380
 381         POP3C_DBG_READ();
 382         if (!POP3C_OK) return eTerminateConnection;
 383         RecvMsg->CurrMsg->MsgUIDL = NewStrBufPlain(NULL, StrLength(RecvMsg->IO.IOBuf));
 384         RecvMsg->CurrMsg->MsgUID = NewStrBufPlain(NULL, StrLength(RecvMsg->IO.IOBuf) * 2);
 385
 386         StrBufExtract_token(RecvMsg->CurrMsg->MsgUIDL, RecvMsg->IO.IOBuf, 2, ' ');
 387         StrBufPrintf(RecvMsg->CurrMsg->MsgUID,
 388                      "pop3/%s/%s:%s@%s",
 389                      ChrPtr(RecvMsg->RoomName),
 390                      ChrPtr(RecvMsg->CurrMsg->MsgUIDL),
 391                      RecvMsg->IO.ConnectMe->User,
 392                      RecvMsg->IO.ConnectMe->Host);
 393         RecvMsg->State --;
 394         return eSendReply;
 395 }
 396
 397
 398 eNextState POP3C_SendGetOneMsg(pop3aggr *RecvMsg)
 399 {
 400         long HKLen;
 401         const char *HKey;
 402         void *vData;
 403
 404         RecvMsg->CurrMsg = NULL;
 405         while (GetNextHashPos(RecvMsg->MsgNumbers, RecvMsg->Pos, &HKLen, &HKey, &vData) &&
 406                (RecvMsg->CurrMsg = (FetchItem*) vData, RecvMsg->CurrMsg->NeedFetch == 0))
 407         {}
 408
 409         if ((RecvMsg->CurrMsg != NULL ) && (RecvMsg->CurrMsg->NeedFetch == 1))
 410         {
 411                 /* Message has not been seen. Tell the server to fetch the message... */
 412                 StrBufPrintf(RecvMsg->IO.SendBuf.Buf,
 413                              "RETR %ld\r\n", RecvMsg->CurrMsg->MSGID);
 414                 POP3C_DBG_SEND();
 415                 return eReadMessage;
 416         }
 417         else {
 418                 RecvMsg->State = ReadQuitState;
 419                 return POP3_C_DispatchWriteDone(&RecvMsg->IO);
 420         }
 421 }
 422
 423
 424 eNextState POP3C_ReadMessageBodyFollowing(pop3aggr *RecvMsg)
 425 {
 426         POP3C_DBG_READ();
 427         if (!POP3C_OK) return eTerminateConnection;
 428         RecvMsg->IO.ReadMsg = NewAsyncMsg(HKEY("."),
 429                                           RecvMsg->CurrMsg->MSGSize,
 430                                           config.c_maxmsglen,
 431                                           NULL, -1,
 432                                           1);
 433
 434         return eReadPayload;
 435 }
 436
 437
 438 eNextState POP3C_StoreMsgRead(AsyncIO *IO)
 439 {
 440         pop3aggr *RecvMsg = (pop3aggr *) IO->Data;
 441         struct UseTable ut;
 442
 443         syslog(LOG_DEBUG, "MARKING: %s as seen: ", ChrPtr(RecvMsg->CurrMsg->MsgUID));
 444
 445         safestrncpy(ut.ut_msgid,
 446                     ChrPtr(RecvMsg->CurrMsg->MsgUID),
 447                     sizeof(ut.ut_msgid));
 448         ut.ut_timestamp = time(NULL); /* TODO: use libev time */
 449         cdb_store(CDB_USETABLE,
 450                   ChrPtr(RecvMsg->CurrMsg->MsgUID),
 451                   StrLength(RecvMsg->CurrMsg->MsgUID),
 452                   &ut,
 453                   sizeof(struct UseTable) );
 454
 455         return QueueEventContext(&RecvMsg->IO, POP3_C_ReAttachToFetchMessages);
 456 }
 457 eNextState POP3C_SaveMsg(AsyncIO *IO)
 458 {
 459         long msgnum;
 460         pop3aggr *RecvMsg = (pop3aggr *) IO->Data;
 461
 462         /* Do Something With It (tm) */
 463         msgnum = CtdlSubmitMsg(RecvMsg->CurrMsg->Msg,
 464                                NULL,
 465                                ChrPtr(RecvMsg->RoomName),
 466                                0);
 467         if (msgnum > 0L) {
 468                 /* Message has been committed to the store */
 469                 /* write the uidl to the use table so we don't fetch this message again */
 470         }
 471         CtdlFreeMessage(RecvMsg->CurrMsg->Msg);
 472
 473         return NextDBOperation(&RecvMsg->IO, POP3C_StoreMsgRead);
 474 }
 475
 476 eNextState POP3C_ReadMessageBody(pop3aggr *RecvMsg)
 477 {
 478         syslog(LOG_DEBUG, "Converting message...\n");
 479         RecvMsg->CurrMsg->Msg = convert_internet_message_buf(&RecvMsg->IO.ReadMsg->MsgBuf);
 480
 481         return QueueDBOperation(&RecvMsg->IO, POP3C_SaveMsg);
 482 }
 483
 484 eNextState POP3C_SendDelete(pop3aggr *RecvMsg)
 485 {
 486         if (!RecvMsg->keep) {
 487                 StrBufPrintf(RecvMsg->IO.SendBuf.Buf,
 488                              "DELE %ld\r\n", RecvMsg->CurrMsg->MSGID);
 489                 POP3C_DBG_SEND();
 490                 return eReadMessage;
 491         }
 492         else {
 493                 RecvMsg->State = ReadMessageBodyFollowing;
 494                 return POP3_C_DispatchWriteDone(&RecvMsg->IO);
 495         }
 496 }
 497 eNextState POP3C_ReadDeleteState(pop3aggr *RecvMsg)
 498 {
 499         POP3C_DBG_READ();
 500         RecvMsg->State = GetOneMessageIDState;
 501         return eReadMessage;
 502 }
 503
 504 eNextState POP3C_SendQuit(pop3aggr *RecvMsg)
 505 {
 506         /* Log out */
 507         StrBufPlain(RecvMsg->IO.SendBuf.Buf,
 508                     HKEY("QUIT\r\n3)"));
 509         POP3C_DBG_SEND();
 510         return eReadMessage;
 511 }
 512
 513
 514 eNextState POP3C_ReadQuitState(pop3aggr *RecvMsg)
 515 {
 516         POP3C_DBG_READ();
 517         return eTerminateConnection;
 518 }
 519
 520 const long POP3_C_ConnTimeout = 1000;
 521 const long DefaultPOP3Port = 110;
 522
 523 Pop3ClientHandler POP3C_ReadHandlers[] = {
 524         POP3C_ReadGreeting,
 525         POP3C_GetUserState,
 526         POP3C_GetPassState,
 527         POP3C_GetListCommandState,
 528         POP3C_GetListOneLine,
 529         POP3C_GetOneMessageIDState,
 530         POP3C_ReadMessageBodyFollowing,
 531         POP3C_ReadMessageBody,
 532         POP3C_ReadDeleteState,
 533         POP3C_ReadQuitState,
 534 };
 535
 536 const long POP3_C_SendTimeouts[POP3C_MaxRead] = {
 537         100,
 538         100,
 539         100,
 540         100,
 541         100,
 542         100,
 543         100,
 544         100
 545 };
 546 const ConstStr POP3C_ReadErrors[POP3C_MaxRead] = {
 547         {HKEY("Connection broken during ")},
 548         {HKEY("Connection broken during ")},
 549         {HKEY("Connection broken during ")},
 550         {HKEY("Connection broken during ")},
 551         {HKEY("Connection broken during ")},
 552         {HKEY("Connection broken during ")},
 553         {HKEY("Connection broken during ")},
 554         {HKEY("Connection broken during ")}
 555 };
 556
 557 Pop3ClientHandler POP3C_SendHandlers[] = {
 558         NULL, /* we don't send a greeting */
 559         POP3C_SendUser,
 560         POP3C_SendPassword,
 561         POP3C_SendListCommand,
 562         NULL,
 563         POP3C_GetOneMessagID,
 564         POP3C_SendGetOneMsg,
 565         NULL,
 566         POP3C_SendDelete,
 567         POP3C_SendQuit
 568 };
 569
 570 const long POP3_C_ReadTimeouts[] = {
 571         100,
 572         100,
 573         100,
 574         100,
 575         100,
 576         100,
 577         100,
 578         100,
 579         100,
 580         100
 581 };
 582 /*****************************************************************************/
 583 /*                     POP3 CLIENT DISPATCHER                                */
 584 /*****************************************************************************/
 585
 586 void POP3SetTimeout(eNextState NextTCPState, pop3aggr *pMsg)
 587 {
 588         double Timeout = 0.0;
 589
 590         syslog(LOG_DEBUG, "POP3: %s\n", __FUNCTION__);
 591
 592         switch (NextTCPState) {
 593         case eSendReply:
 594         case eSendMore:
 595                 Timeout = POP3_C_SendTimeouts[pMsg->State];
 596 /*
 597   if (pMsg->State == eDATABody) {
 598   / * if we're sending a huge message, we need more time. * /
 599   Timeout += StrLength(pMsg->msgtext) / 1024;
 600   }
 601 */
 602                 break;
 603         case eReadMessage:
 604                 Timeout = POP3_C_ReadTimeouts[pMsg->State];
 605 /*
 606   if (pMsg->State == eDATATerminateBody) {
 607   / *
 608   * some mailservers take a nap before accepting the message
 609   * content inspection and such.
 610   * /
 611   Timeout += StrLength(pMsg->msgtext) / 1024;
 612   }
 613 */
 614                 break;
 615         case eReadPayload:
 616                 Timeout = 100000;
 617                 /* TODO!!! */
 618                 break;
 619         case eSendDNSQuery:
 620         case eReadDNSReply:
 621         case eConnect:
 622         case eTerminateConnection:
 623         case eDBQuery:
 624         case eAbort:
 625         case eReadMore://// TODO
 626                 return;
 627         }
 628         SetNextTimeout(&pMsg->IO, Timeout);
 629 }
 630 eNextState POP3_C_DispatchReadDone(AsyncIO *IO)
 631 {
 632         syslog(LOG_DEBUG, "POP3: %s\n", __FUNCTION__);
 633         pop3aggr *pMsg = IO->Data;
 634         eNextState rc;
 635
 636         rc = POP3C_ReadHandlers[pMsg->State](pMsg);
 637         if (rc != eReadMore)
 638             pMsg->State++;
 639         POP3SetTimeout(rc, pMsg);
 640         return rc;
 641 }
 642 eNextState POP3_C_DispatchWriteDone(AsyncIO *IO)
 643 {
 644         syslog(LOG_DEBUG, "POP3: %s\n", __FUNCTION__);
 645         pop3aggr *pMsg = IO->Data;
 646         eNextState rc;
 647
 648         rc = POP3C_SendHandlers[pMsg->State](pMsg);
 649         POP3SetTimeout(rc, pMsg);
 650         return rc;
 651 }
 652
 653
 654 /*****************************************************************************/
 655 /*                     POP3 CLIENT ERROR CATCHERS                            */
 656 /*****************************************************************************/
 657 eNextState POP3_C_Terminate(AsyncIO *IO)
 658 {
 659 ///     pop3aggr *pMsg = (pop3aggr *)IO->Data;
 660
 661         syslog(LOG_DEBUG, "POP3: %s\n", __FUNCTION__);
 662         FinalizePOP3AggrRun(IO);
 663         return eAbort;
 664 }
 665 eNextState POP3_C_Timeout(AsyncIO *IO)
 666 {
 667         pop3aggr *pMsg = IO->Data;
 668
 669         syslog(LOG_DEBUG, "POP3: %s\n", __FUNCTION__);
 670         StrBufPlain(IO->ErrMsg, CKEY(POP3C_ReadErrors[pMsg->State]));
 671         return FailAggregationRun(IO);
 672 }
 673 eNextState POP3_C_ConnFail(AsyncIO *IO)
 674 {
 675         pop3aggr *pMsg = (pop3aggr *)IO->Data;
 676
 677         syslog(LOG_DEBUG, "POP3: %s\n", __FUNCTION__);
 678         StrBufPlain(IO->ErrMsg, CKEY(POP3C_ReadErrors[pMsg->State]));
 679         return FailAggregationRun(IO);
 680 }
 681 eNextState POP3_C_Shutdown(AsyncIO *IO)
 682 {
 683         syslog(LOG_DEBUG, "POP3: %s\n", __FUNCTION__);
 684 ////    pop3aggr *pMsg = IO->Data;
 685
 686         ////pMsg->MyQEntry->Status = 3;
 687         ///StrBufPlain(pMsg->MyQEntry->StatusMessage, HKEY("server shutdown during message retrieval."));
 688         FinalizePOP3AggrRun(IO);
 689         return eAbort;
 690 }
 691
 692
 693 /**
 694  * @brief lineread Handler; understands when to read more POP3 lines, and when this is a one-lined reply.
 695  */
 696 eReadState POP3_C_ReadServerStatus(AsyncIO *IO)
 697 {
 698         eReadState Finished = eBufferNotEmpty;
 699
 700         switch (IO->NextState) {
 701         case eSendDNSQuery:
 702         case eReadDNSReply:
 703         case eDBQuery:
 704         case eConnect:
 705         case eTerminateConnection:
 706         case eAbort:
 707                 Finished = eReadFail;
 708                 break;
 709         case eSendReply:
 710         case eSendMore:
 711         case eReadMore:
 712         case eReadMessage:
 713                 Finished = StrBufChunkSipLine(IO->IOBuf, &IO->RecvBuf);
 714                 break;
 715         case eReadPayload:
 716                 Finished = CtdlReadMessageBodyAsync(IO);
 717                 break;
 718         }
 719         return Finished;
 720 }
 721
 722 /*****************************************************************************
 723  * So we connect our Server IP here.                                         *
 724  *****************************************************************************/
 725 eNextState POP3_C_ReAttachToFetchMessages(AsyncIO *IO)
 726 {
 727         pop3aggr *cpptr = IO->Data;
 728
 729         syslog(LOG_DEBUG, "POP3: %s\n", __FUNCTION__);
 730 ////??? cpptr->State ++;
 731         if (cpptr->Pos == NULL)
 732                 cpptr->Pos = GetNewHashPos(cpptr->MsgNumbers, 0);
 733
 734         POP3_C_DispatchWriteDone(IO);
 735         ReAttachIO(IO, cpptr, 0);
 736         IO->NextState = eReadMessage;
 737         return IO->NextState;
 738 }
 739
 740 eNextState connect_ip(AsyncIO *IO)
 741 {
 742         pop3aggr *cpptr = IO->Data;
 743
 744         syslog(LOG_DEBUG, "POP3: %s\n", __FUNCTION__);
 745
 746 ////    IO->ConnectMe = &cpptr->Pop3Host;
 747         /*  Bypass the ns lookup result like this: IO->Addr.sin_addr.s_addr = inet_addr("127.0.0.1"); */
 748
 749         /////// SetConnectStatus(IO);
 750
 751         return InitEventIO(IO, cpptr,
 752                            POP3_C_ConnTimeout,
 753                            POP3_C_ReadTimeouts[0],
 754                            1);
 755 }
 756
 757 eNextState get_one_host_ip_done(AsyncIO *IO)
 758 {
 759         pop3aggr *cpptr = IO->Data;
 760         struct hostent *hostent;
 761
 762         QueryCbDone(IO);
 763
 764         hostent = cpptr->HostLookup.VParsedDNSReply;
 765         if ((cpptr->HostLookup.DNSStatus == ARES_SUCCESS) &&
 766             (hostent != NULL) ) {
 767                 memset(&cpptr->IO.ConnectMe->Addr, 0, sizeof(struct in6_addr));
 768                 if (cpptr->IO.ConnectMe->IPv6) {
 769                         memcpy(&cpptr->IO.ConnectMe->Addr.sin6_addr.s6_addr,
 770                                &hostent->h_addr_list[0],
 771                                sizeof(struct in6_addr));
 772
 773                         cpptr->IO.ConnectMe->Addr.sin6_family = hostent->h_addrtype;
 774                         cpptr->IO.ConnectMe->Addr.sin6_port   = htons(DefaultPOP3Port);
 775                 }
 776                 else {
 777                         struct sockaddr_in *addr = (struct sockaddr_in*) &cpptr->IO.ConnectMe->Addr;
 778                         /* Bypass the ns lookup result like this: IO->Addr.sin_addr.s_addr = inet_addr("127.0.0.1"); */
 779 //                      addr->sin_addr.s_addr = htonl((uint32_t)&hostent->h_addr_list[0]);
 780                         memcpy(&addr->sin_addr.s_addr,
 781                                hostent->h_addr_list[0],
 782                                sizeof(uint32_t));
 783
 784                         addr->sin_family = hostent->h_addrtype;
 785                         addr->sin_port   = htons(DefaultPOP3Port);
 786
 787                 }
 788                 return connect_ip(IO);
 789         }
 790         else
 791                 return eAbort;
 792 }
 793
 794 eNextState get_one_host_ip(AsyncIO *IO)
 795 {
 796         pop3aggr *cpptr = IO->Data;
 797         /*
 798          * here we start with the lookup of one host. it might be...
 799          * - the relay host *sigh*
 800          * - the direct hostname if there was no mx record
 801          * - one of the mx'es
 802          */
 803
 804         InitC_ares_dns(IO);
 805
 806         syslog(LOG_DEBUG, "POP3: %s\n", __FUNCTION__);
 807
 808         syslog(LOG_DEBUG,
 809                       "POP3 client[%ld]: looking up %s-Record %s : %d ...\n",
 810                       cpptr->n,
 811                       (cpptr->IO.ConnectMe->IPv6)? "aaaa": "a",
 812                       cpptr->IO.ConnectMe->Host,
 813                       cpptr->IO.ConnectMe->Port);
 814
 815         QueueQuery((cpptr->IO.ConnectMe->IPv6)? ns_t_aaaa : ns_t_a,
 816                    cpptr->IO.ConnectMe->Host,
 817                    &cpptr->IO,
 818                    &cpptr->HostLookup,
 819                    get_one_host_ip_done);
 820         IO->NextState = eReadDNSReply;
 821         return IO->NextState;
 822 }
 823
 824
 825
 826 int pop3_do_fetching(pop3aggr *cpptr)
 827 {
 828         CitContext *SubC;
 829
 830         cpptr->IO.Data          = cpptr;
 831
 832         cpptr->IO.SendDone      = POP3_C_DispatchWriteDone;
 833         cpptr->IO.ReadDone      = POP3_C_DispatchReadDone;
 834         cpptr->IO.Terminate     = POP3_C_Terminate;
 835         cpptr->IO.LineReader    = POP3_C_ReadServerStatus;
 836         cpptr->IO.ConnFail      = POP3_C_ConnFail;
 837         cpptr->IO.Timeout       = POP3_C_Timeout;
 838         cpptr->IO.ShutdownAbort = POP3_C_Shutdown;
 839
 840         cpptr->IO.SendBuf.Buf   = NewStrBufPlain(NULL, 1024);
 841         cpptr->IO.RecvBuf.Buf   = NewStrBufPlain(NULL, 1024);
 842         cpptr->IO.IOBuf         = NewStrBuf();
 843
 844         cpptr->IO.NextState     = eReadMessage;
 845 /* TODO
 846    syslog(LOG_DEBUG, "POP3: %s %s %s <password>\n", roomname, pop3host, pop3user);
 847    syslog(LOG_DEBUG, "Connecting to <%s>\n", pop3host);
 848 */
 849
 850         SubC = CloneContext (&pop3_client_CC);
 851         SubC->session_specific_data = (char*) cpptr;
 852         cpptr->IO.CitContext = SubC;
 853
 854         if (cpptr->IO.ConnectMe->IsIP) {
 855                 QueueEventContext(&cpptr->IO,
 856                                   connect_ip);
 857         }
 858         else { /* uneducated admin has chosen to add DNS to the equation... */
 859                 QueueEventContext(&cpptr->IO,
 860                                   get_one_host_ip);
 861         }
 862         return 1;
 863 }
 864
 865 /*
 866  * Scan a room's netconfig to determine whether it requires POP3 aggregation
 867  */
 868 void pop3client_scan_room(struct ctdlroom *qrbuf, void *data)
 869 {
 870         StrBuf *CfgData;
 871         StrBuf *CfgType;
 872         StrBuf *Line;
 873
 874         struct stat statbuf;
 875         char filename[PATH_MAX];
 876         int  fd;
 877         int Done;
 878         void *vptr;
 879         const char *CfgPtr, *lPtr;
 880         const char *Err;
 881
 882 //      pop3_room_counter *Count = NULL;
 883 //      pop3aggr *cpptr;
 884
 885         citthread_mutex_lock(&POP3QueueMutex);
 886         if (GetHash(POP3QueueRooms, LKEY(qrbuf->QRnumber), &vptr))
 887         {
 888                 syslog(LOG_DEBUG,
 889                               "pop3client: [%ld] %s already in progress.\n",
 890                               qrbuf->QRnumber,
 891                               qrbuf->QRname);
 892                 citthread_mutex_unlock(&POP3QueueMutex);
 893                 return;
 894         }
 895         citthread_mutex_unlock(&POP3QueueMutex);
 896
 897         assoc_file_name(filename, sizeof filename, qrbuf, ctdl_netcfg_dir);
 898
 899         if (CtdlThreadCheckStop())
 900                 return;
 901
 902         /* Only do net processing for rooms that have netconfigs */
 903         fd = open(filename, 0);
 904         if (fd <= 0) {
 905                 //syslog(LOG_DEBUG, "rssclient: %s no config.\n", qrbuf->QRname);
 906                 return;
 907         }
 908         if (CtdlThreadCheckStop())
 909                 return;
 910         if (fstat(fd, &statbuf) == -1) {
 911                 syslog(LOG_DEBUG, "ERROR: could not stat configfile '%s' - %s\n",
 912                               filename, strerror(errno));
 913                 return;
 914         }
 915         if (CtdlThreadCheckStop())
 916                 return;
 917         CfgData = NewStrBufPlain(NULL, statbuf.st_size + 1);
 918         if (StrBufReadBLOB(CfgData, &fd, 1, statbuf.st_size, &Err) < 0) {
 919                 close(fd);
 920                 FreeStrBuf(&CfgData);
 921                 syslog(LOG_DEBUG, "ERROR: reading config '%s' - %s<br>\n",
 922                               filename, strerror(errno));
 923                 return;
 924         }
 925         close(fd);
 926         if (CtdlThreadCheckStop())
 927                 return;
 928
 929         CfgPtr = NULL;
 930         CfgType = NewStrBuf();
 931         Line = NewStrBufPlain(NULL, StrLength(CfgData));
 932         Done = 0;
 933
 934         while (!Done)
 935         {
 936                 Done = StrBufSipLine(Line, CfgData, &CfgPtr) == 0;
 937                 if (StrLength(Line) > 0)
 938                 {
 939                         lPtr = NULL;
 940                         StrBufExtract_NextToken(CfgType, Line, &lPtr, '|');
 941                         if (!strcasecmp("pop3client", ChrPtr(CfgType)))
 942                         {
 943                                 pop3aggr *cptr;
 944                                 StrBuf *Tmp;
 945 /*
 946                                 if (Count == NULL)
 947                                 {
 948                                         Count = malloc(sizeof(pop3_room_counter));
 949                                         Count->count = 0;
 950                                 }
 951                                 Count->count ++;
 952 */
 953                                 cptr = (pop3aggr *) malloc(sizeof(pop3aggr));
 954                                 memset(cptr, 0, sizeof(pop3aggr));
 955                                 /// TODO do we need this? cptr->roomlist_parts = 1;
 956                                 cptr->RoomName = NewStrBufPlain(qrbuf->QRname, -1);
 957                                 cptr->pop3user = NewStrBufPlain(NULL, StrLength(Line));
 958                                 cptr->pop3pass = NewStrBufPlain(NULL, StrLength(Line));
 959                                 cptr->Url = NewStrBuf();
 960                                 Tmp = NewStrBuf();
 961
 962                                 StrBufExtract_NextToken(Tmp, Line, &lPtr, '|');
 963                                 StrBufExtract_NextToken(cptr->pop3user, Line, &lPtr, '|');
 964                                 StrBufExtract_NextToken(cptr->pop3pass, Line, &lPtr, '|');
 965                                 cptr->keep = StrBufExtractNext_long(Line, &lPtr, '|');
 966                                 cptr->interval = StrBufExtractNext_long(Line, &lPtr, '|');
 967
 968                                 StrBufPrintf(cptr->Url, "pop3://%s:%s@%s/%s",
 969                                              ChrPtr(cptr->pop3user),
 970                                              ChrPtr(cptr->pop3pass),
 971                                              ChrPtr(Tmp),
 972                                              ChrPtr(cptr->RoomName));
 973                                 FreeStrBuf(&Tmp);
 974                                 ParseURL(&cptr->IO.ConnectMe, cptr->Url, 110);
 975
 976
 977 #if 0
 978 /* todo: we need to reunite the url to be shure. */
 979
 980                                 citthread_mutex_lock(&POP3ueueMutex);
 981                                 GetHash(POP3FetchUrls, SKEY(ptr->Url), &vptr);
 982                                 use_this_cptr = (pop3aggr *)vptr;
 983
 984                                 if (use_this_rncptr != NULL)
 985                                 {
 986                                         /* mustn't attach to an active session */
 987                                         if (use_this_cptr->RefCount > 0)
 988                                         {
 989                                                 DeletePOP3Cfg(cptr);
 990 ///                                             Count->count--;
 991                                         }
 992                                         else
 993                                         {
 994                                                 long *QRnumber;
 995                                                 StrBufAppendBufPlain(use_this_cptr->rooms,
 996                                                                      qrbuf->QRname,
 997                                                                      -1, 0);
 998                                                 if (use_this_cptr->roomlist_parts == 1)
 999                                                 {
1000                                                         use_this_cptr->OtherQRnumbers = NewHash(1, lFlathash);
1001                                                 }
1002                                                 QRnumber = (long*)malloc(sizeof(long));
1003                                                 *QRnumber = qrbuf->QRnumber;
1004                                                 Put(use_this_cptr->OtherQRnumbers, LKEY(qrbuf->QRnumber), QRnumber, NULL);
1005                                                 use_this_cptr->roomlist_parts++;
1006                                         }
1007                                         citthread_mutex_unlock(&POP3QueueMutex);
1008                                         continue;
1009                                 }
1010                                 citthread_mutex_unlock(&RSSQueueMutex);
1011 #endif
1012
1013                                 citthread_mutex_lock(&POP3QueueMutex);
1014                                 Put(POP3FetchUrls, SKEY(cptr->Url), cptr, DeletePOP3Aggregator);
1015                                 citthread_mutex_unlock(&POP3QueueMutex);
1016
1017                         }
1018
1019                 }
1020
1021                 ///fclose(fp);
1022
1023         }
1024         FreeStrBuf(&Line);
1025         FreeStrBuf(&CfgType);
1026         FreeStrBuf(&CfgData);
1027 }
1028
1029
1030 void pop3client_scan(void) {
1031         static time_t last_run = 0L;
1032         static int doing_pop3client = 0;
1033 ///     struct pop3aggr *pptr;
1034         time_t fastest_scan;
1035         HashPos *it;
1036         long len;
1037         const char *Key;
1038         void *vrptr;
1039         pop3aggr *cptr;
1040
1041         if (config.c_pop3_fastest < config.c_pop3_fetch)
1042                 fastest_scan = config.c_pop3_fastest;
1043         else
1044                 fastest_scan = config.c_pop3_fetch;
1045
1046         /*
1047          * Run POP3 aggregation no more frequently than once every n seconds
1048          */
1049         if ( (time(NULL) - last_run) < fastest_scan ) {
1050                 return;
1051         }
1052
1053         /*
1054          * This is a simple concurrency check to make sure only one pop3client run
1055          * is done at a time.  We could do this with a mutex, but since we
1056          * don't really require extremely fine granularity here, we'll do it
1057          * with a static variable instead.
1058          */
1059         if (doing_pop3client) return;
1060         doing_pop3client = 1;
1061
1062         syslog(LOG_DEBUG, "pop3client started\n");
1063         CtdlForEachRoom(pop3client_scan_room, NULL);
1064
1065
1066         citthread_mutex_lock(&POP3QueueMutex);
1067         it = GetNewHashPos(POP3FetchUrls, 0);
1068         while (GetNextHashPos(POP3FetchUrls, it, &len, &Key, &vrptr) &&
1069                (vrptr != NULL)) {
1070                 cptr = (pop3aggr *)vrptr;
1071                 if (cptr->RefCount == 0)
1072                         if (!pop3_do_fetching(cptr))
1073                                 DeletePOP3Aggregator(cptr);////TODO
1074         }
1075         DeleteHashPos(&it);
1076         citthread_mutex_unlock(&POP3QueueMutex);
1077
1078         syslog(LOG_DEBUG, "pop3client ended\n");
1079         last_run = time(NULL);
1080         doing_pop3client = 0;
1081 }
1082
1083
1084 void pop3_cleanup(void)
1085 {
1086         citthread_mutex_destroy(&POP3QueueMutex);
1087         DeleteHash(&POP3FetchUrls);
1088         DeleteHash(&POP3QueueRooms);
1089 }
1090
1091 CTDL_MODULE_INIT(pop3client)
1092 {
1093         if (!threading)
1094         {
1095                 CtdlFillSystemContext(&pop3_client_CC, "POP3aggr");
1096                 citthread_mutex_init(&POP3QueueMutex, NULL);
1097                 POP3QueueRooms = NewHash(1, lFlathash);
1098                 POP3FetchUrls = NewHash(1, NULL);
1099                 CtdlRegisterSessionHook(pop3client_scan, EVT_TIMER);
1100                 CtdlRegisterCleanupHook(pop3_cleanup);
1101         }
1102         /* return our Subversion id for the Log */
1103         return "pop3client";
1104 }