citadel/modules/smtp/serv_smtpeventclient.c

   1 /*
   2  * This module is an SMTP and ESMTP implementation for the Citadel system.
   3  * It is compliant with all of the following:
   4  *
   5  * RFC  821 - Simple Mail Transfer Protocol
   6  * RFC  876 - Survey of SMTP Implementations
   7  * RFC 1047 - Duplicate messages and SMTP
   8  * RFC 1652 - 8 bit MIME
   9  * RFC 1869 - Extended Simple Mail Transfer Protocol
  10  * RFC 1870 - SMTP Service Extension for Message Size Declaration
  11  * RFC 2033 - Local Mail Transfer Protocol
  12  * RFC 2197 - SMTP Service Extension for Command Pipelining
  13  * RFC 2476 - Message Submission
  14  * RFC 2487 - SMTP Service Extension for Secure SMTP over TLS
  15  * RFC 2554 - SMTP Service Extension for Authentication
  16  * RFC 2821 - Simple Mail Transfer Protocol
  17  * RFC 2822 - Internet Message Format
  18  * RFC 2920 - SMTP Service Extension for Command Pipelining
  19  *
  20  * The VRFY and EXPN commands have been removed from this implementation
  21  * because nobody uses these commands anymore, except for spammers.
  22  *
  23  * Copyright (c) 1998-2009 by the citadel.org team
  24  *
  25  *  This program is free software; you can redistribute it and/or modify
  26  *  it under the terms of the GNU General Public License as published by
  27  *  the Free Software Foundation; either version 3 of the License, or
  28  *  (at your option) any later version.
  29  *
  30  *  This program is distributed in the hope that it will be useful,
  31  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  32  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  33  *  GNU General Public License for more details.
  34  *
  35  *  You should have received a copy of the GNU General Public License
  36  *  along with this program; if not, write to the Free Software
  37  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  38  */
  39
  40 #include "sysdep.h"
  41 #include <stdlib.h>
  42 #include <unistd.h>
  43 #include <stdio.h>
  44 #include <termios.h>
  45 #include <fcntl.h>
  46 #include <signal.h>
  47 #include <pwd.h>
  48 #include <errno.h>
  49 #include <sys/types.h>
  50 #include <syslog.h>
  51
  52 #if TIME_WITH_SYS_TIME
  53 # include <sys/time.h>
  54 # include <time.h>
  55 #else
  56 # if HAVE_SYS_TIME_H
  57 #  include <sys/time.h>
  58 # else
  59 #  include <time.h>
  60 # endif
  61 #endif
  62 #include <sys/wait.h>
  63 #include <ctype.h>
  64 #include <string.h>
  65 #include <limits.h>
  66 #include <sys/socket.h>
  67 #include <netinet/in.h>
  68 #include <arpa/inet.h>
  69 #include <libcitadel.h>
  70 #include "citadel.h"
  71 #include "server.h"
  72 #include "citserver.h"
  73 #include "support.h"
  74 #include "config.h"
  75 #include "control.h"
  76 #include "user_ops.h"
  77 #include "database.h"
  78 #include "msgbase.h"
  79 #include "internet_addressing.h"
  80 #include "genstamp.h"
  81 #include "domain.h"
  82 #include "clientsocket.h"
  83 #include "locate_host.h"
  84 #include "citadel_dirs.h"
  85
  86 #include "ctdl_module.h"
  87
  88 #include "smtp_util.h"
  89 #include "event_client.h"
  90 #include "smtpqueue.h"
  91
  92 #ifdef EXPERIMENTAL_SMTP_EVENT_CLIENT
  93 /*****************************************************************************/
  94 /*               SMTP CLIENT (OUTBOUND PROCESSING) STUFF                     */
  95 /*****************************************************************************/
  96
  97 typedef enum _eSMTP_C_States {
  98         eConnect,
  99         eEHLO,
 100         eHELO,
 101         eSMTPAuth,
 102         eFROM,
 103         eRCPT,
 104         eDATA,
 105         eDATABody,
 106         eDATATerminateBody,
 107         eQUIT,
 108         eMaxSMTPC
 109 } eSMTP_C_States;
 110
 111 const double SMTP_C_ConnTimeout = 60.; /* wail 1 minute for connections... */
 112 const double SMTP_C_ReadTimeouts[eMaxSMTPC] = {
 113         300., /* Greeting... */
 114         30., /* EHLO */
 115         30., /* HELO */
 116         30., /* Auth */
 117         30., /* From */
 118         90., /* RCPT */
 119         30., /* DATA */
 120         90., /* DATABody */
 121         90., /* end of body... */
 122         30.  /* QUIT */
 123 };
 124 const double SMTP_C_SendTimeouts[eMaxSMTPC] = {
 125         90., /* Greeting... */
 126         30., /* EHLO */
 127         30., /* HELO */
 128         30., /* Auth */
 129         30., /* From */
 130         30., /* RCPT */
 131         30., /* DATA */
 132         90., /* DATABody */
 133         900., /* end of body... */
 134         30.  /* QUIT */
 135 };
 136 /*
 137 const long SMTP_C_SendTimeouts[eMaxSMTPC] = {
 138
 139 }; */
 140 static const ConstStr ReadErrors[eMaxSMTPC] = {
 141         {HKEY("Connection broken during SMTP conversation")},
 142         {HKEY("Connection broken during SMTP EHLO")},
 143         {HKEY("Connection broken during SMTP HELO")},
 144         {HKEY("Connection broken during SMTP AUTH")},
 145         {HKEY("Connection broken during SMTP MAIL FROM")},
 146         {HKEY("Connection broken during SMTP RCPT")},
 147         {HKEY("Connection broken during SMTP DATA")},
 148         {HKEY("Connection broken during SMTP message transmit")},
 149         {HKEY("")}/* quit reply, don't care. */
 150 };
 151
 152
 153 typedef struct _stmp_out_msg {
 154         MailQEntry *MyQEntry;
 155         OneQueItem *MyQItem;
 156         long n;
 157         AsyncIO IO;
 158
 159         eSMTP_C_States State;
 160
 161         struct ares_mx_reply *AllMX;
 162         struct ares_mx_reply *CurrMX;
 163         const char *mx_port;
 164         const char *mx_host;
 165
 166         struct hostent *OneMX;
 167
 168         char mx_user[1024];
 169         char mx_pass[1024];
 170         StrBuf *msgtext;
 171         char *envelope_from;
 172         char user[1024];
 173         char node[1024];
 174         char name[1024];
 175         char mailfrom[1024];
 176 } SmtpOutMsg;
 177
 178 void DeleteSmtpOutMsg(void *v)
 179 {
 180         SmtpOutMsg *Msg = v;
 181
 182         ares_free_data(Msg->AllMX);
 183
 184         FreeStrBuf(&Msg->msgtext);
 185         FreeAsyncIOContents(&Msg->IO);
 186         free(Msg);
 187 }
 188
 189 eNextState SMTP_C_Timeout(AsyncIO *IO);
 190 eNextState SMTP_C_ConnFail(AsyncIO *IO);
 191 eNextState SMTP_C_DispatchReadDone(AsyncIO *IO);
 192 eNextState SMTP_C_DispatchWriteDone(AsyncIO *IO);
 193 eNextState SMTP_C_Terminate(AsyncIO *IO);
 194 eReadState SMTP_C_ReadServerStatus(AsyncIO *IO);
 195
 196 typedef eNextState (*SMTPReadHandler)(SmtpOutMsg *Msg);
 197 typedef eNextState (*SMTPSendHandler)(SmtpOutMsg *Msg);
 198
 199
 200 #define SMTP_ERROR(WHICH_ERR, ERRSTR) do {\
 201                 SendMsg->MyQEntry->Status = WHICH_ERR; \
 202                 StrBufAppendBufPlain(SendMsg->MyQEntry->StatusMessage, HKEY(ERRSTR), 0); \
 203                 return eAbort; } \
 204         while (0)
 205
 206 #define SMTP_VERROR(WHICH_ERR) do {\
 207                 SendMsg->MyQEntry->Status = WHICH_ERR; \
 208                 StrBufPlain(SendMsg->MyQEntry->StatusMessage, \
 209                             ChrPtr(SendMsg->IO.IOBuf) + 4, \
 210                             StrLength(SendMsg->IO.IOBuf) - 4); \
 211                 return eAbort; } \
 212         while (0)
 213
 214 #define SMTP_IS_STATE(WHICH_STATE) (ChrPtr(SendMsg->IO.IOBuf)[0] == WHICH_STATE)
 215
 216 #define SMTP_DBG_SEND() CtdlLogPrintf(CTDL_DEBUG, "SMTP client[%ld]: > %s\n", SendMsg->n, ChrPtr(SendMsg->IO.IOBuf))
 217 #define SMTP_DBG_READ() CtdlLogPrintf(CTDL_DEBUG, "SMTP client[%ld]: < %s\n", SendMsg->n, ChrPtr(SendMsg->IO.IOBuf))
 218
 219
 220 void FinalizeMessageSend(SmtpOutMsg *Msg)
 221 {
 222         CtdlLogPrintf(CTDL_DEBUG, "SMTP: %s\n", __FUNCTION__);
 223
 224         if (DecreaseQReference(Msg->MyQItem))
 225         {
 226                 int nRemain;
 227                 StrBuf *MsgData;
 228
 229                 nRemain = CountActiveQueueEntries(Msg->MyQItem);
 230
 231                 MsgData = SerializeQueueItem(Msg->MyQItem);
 232                 /*
 233                  * Uncompleted delivery instructions remain, so delete the old
 234                  * instructions and replace with the updated ones.
 235                  */
 236                 CtdlDeleteMessages(SMTP_SPOOLOUT_ROOM, &Msg->MyQItem->QueMsgID, 1, "");
 237                 smtpq_do_bounce(Msg->MyQItem,
 238                                Msg->msgtext);
 239                 if (nRemain > 0) {
 240                         struct CtdlMessage *msg;
 241                         msg = malloc(sizeof(struct CtdlMessage));
 242                         memset(msg, 0, sizeof(struct CtdlMessage));
 243                         msg->cm_magic = CTDLMESSAGE_MAGIC;
 244                         msg->cm_anon_type = MES_NORMAL;
 245                         msg->cm_format_type = FMT_RFC822;
 246                         msg->cm_fields['M'] = SmashStrBuf(&MsgData);
 247                         CtdlSubmitMsg(msg, NULL, SMTP_SPOOLOUT_ROOM, QP_EADDR);
 248                         CtdlFreeMessage(msg);
 249                 }
 250                 else {
 251                         CtdlDeleteMessages(SMTP_SPOOLOUT_ROOM, &Msg->MyQItem->MessageID, 1, "");
 252                         FreeStrBuf(&MsgData);
 253                 }
 254
 255                 RemoveQItem(Msg->MyQItem);
 256         }
 257         DeleteSmtpOutMsg(Msg);
 258 }
 259
 260
 261
 262
 263 void get_one_mx_host_ip_done(void *Ctx,
 264                              int status,
 265                              int timeouts,
 266                              struct hostent *hostent)
 267 {
 268         AsyncIO *IO = Ctx;
 269         SmtpOutMsg *SendMsg = IO->Data;
 270         CtdlLogPrintf(CTDL_DEBUG, "SMTP: %s\n", __FUNCTION__);
 271         if ((status == ARES_SUCCESS) && (hostent != NULL) ) {
 272                 unsigned long psaddr;
 273                 // TODO: IPV6
 274                 memcpy(&psaddr, hostent->h_addr_list[0], sizeof(psaddr));
 275                 psaddr = ntohl(psaddr);
 276
 277                 CtdlLogPrintf(CTDL_DEBUG,
 278                               "SMTP client[%ld]: connecting to %s [%ld.%ld.%ld.%ld:%d] ...\n",
 279                               SendMsg->n,
 280                               SendMsg->mx_host,
 281                               (psaddr >> 24) & 0xFF,
 282                               (psaddr >> 16) & 0xFF,
 283                               (psaddr >>  8) & 0xFF,
 284                               (psaddr >>  0) & 0xFF,
 285                               SendMsg->IO.dport);
 286
 287                 SendMsg->MyQEntry->Status = 5;
 288                 StrBufPrintf(SendMsg->MyQEntry->StatusMessage,
 289                              "Timeout while connecting %s [%ld.%ld.%ld.%ld:%d] ",
 290                              SendMsg->mx_host,
 291                              (psaddr >> 24) & 0xFF,
 292                              (psaddr >> 16) & 0xFF,
 293                              (psaddr >>  8) & 0xFF,
 294                              (psaddr >>  0) & 0xFF,
 295                              SendMsg->IO.dport);
 296
 297                 SendMsg->IO.HEnt = hostent;
 298                 InitEventIO(IO, SendMsg,
 299                             SMTP_C_DispatchReadDone,
 300                             SMTP_C_DispatchWriteDone,
 301                             SMTP_C_Terminate,
 302                             SMTP_C_Timeout,
 303                             SMTP_C_ConnFail,
 304                             SMTP_C_ReadServerStatus,
 305                             SMTP_C_ConnTimeout,
 306                             SMTP_C_ReadTimeouts[0],
 307                             1);
 308
 309         }
 310 }
 311
 312 const unsigned short DefaultMXPort = 25;
 313 void get_one_mx_host_ip(SmtpOutMsg *SendMsg)
 314 {
 315         //char *endpart;
 316         //char buf[SIZ];
 317
 318         CtdlLogPrintf(CTDL_DEBUG, "SMTP: %s\n", __FUNCTION__);
 319         SendMsg->IO.dport = DefaultMXPort;
 320
 321
 322 /* TODO: Relay!
 323         *SendMsg->mx_user =  '\0';
 324         *SendMsg->mx_pass = '\0';
 325         if (num_tokens(buf, '@') > 1) {
 326                 strcpy (SendMsg->mx_user, buf);
 327                 endpart = strrchr(SendMsg->mx_user, '@');
 328                 *endpart = '\0';
 329                 strcpy (SendMsg->mx_host, endpart + 1);
 330                 endpart = strrchr(SendMsg->mx_user, ':');
 331                 if (endpart != NULL) {
 332                         strcpy(SendMsg->mx_pass, endpart+1);
 333                         *endpart = '\0';
 334                 }
 335
 336         endpart = strrchr(SendMsg->mx_host, ':');
 337         if (endpart != 0){
 338                 *endpart = '\0';
 339                 strcpy(SendMsg->mx_port, endpart + 1);
 340         }
 341         }
 342         else
 343 */
 344         SendMsg->mx_host = SendMsg->CurrMX->host;
 345         SendMsg->CurrMX = SendMsg->CurrMX->next;
 346
 347         CtdlLogPrintf(CTDL_DEBUG,
 348                       "SMTP client[%ld]: looking up %s : %d ...\n",
 349                       SendMsg->n,
 350                       SendMsg->mx_host,
 351                       SendMsg->IO.dport);
 352
 353         ares_gethostbyname(SendMsg->IO.DNSChannel,
 354                            SendMsg->mx_host,
 355                            AF_INET6, /* it falls back to ipv4 in doubt... */
 356                            get_one_mx_host_ip_done,
 357                            &SendMsg->IO);
 358 }
 359
 360
 361 eNextState smtp_resolve_mx_done(AsyncIO *IO)
 362 {
 363         SmtpOutMsg * SendMsg = IO->Data;
 364
 365         CtdlLogPrintf(CTDL_DEBUG, "SMTP: %s\n", __FUNCTION__);
 366
 367         SendMsg->IO.SendBuf.Buf = NewStrBufPlain(NULL, 1024);
 368         SendMsg->IO.RecvBuf.Buf = NewStrBufPlain(NULL, 1024);
 369         SendMsg->IO.IOBuf = NewStrBuf();
 370         SendMsg->IO.ErrMsg = SendMsg->MyQEntry->StatusMessage;
 371
 372         SendMsg->CurrMX = SendMsg->AllMX = IO->VParsedDNSReply;
 373         //// TODO: should we remove the current ares context???
 374         get_one_mx_host_ip(SendMsg);
 375         return 0;
 376 }
 377
 378
 379 int resolve_mx_records(void *Ctx)
 380 {
 381         SmtpOutMsg * SendMsg = Ctx;
 382
 383         CtdlLogPrintf(CTDL_DEBUG, "SMTP: %s\n", __FUNCTION__);
 384
 385         if (!QueueQuery(ns_t_mx,
 386                         SendMsg->node,
 387                         &SendMsg->IO,
 388                         smtp_resolve_mx_done))
 389         {
 390                 SendMsg->MyQEntry->Status = 5;
 391                 StrBufPrintf(SendMsg->MyQEntry->StatusMessage,
 392                              "No MX hosts found for <%s>", SendMsg->node);
 393                 return 0; ///////TODO: abort!
 394         }
 395         return 0;
 396 }
 397
 398
 399 int smtp_resolve_recipients(SmtpOutMsg *SendMsg)
 400 {
 401         const char *ptr;
 402         char buf[1024];
 403         int scan_done;
 404         int lp, rp;
 405         int i;
 406
 407         CtdlLogPrintf(CTDL_DEBUG, "SMTP: %s\n", __FUNCTION__);
 408
 409         if ((SendMsg==NULL) ||
 410             (SendMsg->MyQEntry == NULL) ||
 411             (StrLength(SendMsg->MyQEntry->Recipient) == 0)) {
 412                 return 0;
 413         }
 414
 415         /* Parse out the host portion of the recipient address */
 416         process_rfc822_addr(ChrPtr(SendMsg->MyQEntry->Recipient),
 417                             SendMsg->user,
 418                             SendMsg->node,
 419                             SendMsg->name);
 420
 421         CtdlLogPrintf(CTDL_DEBUG, "SMTP client[%ld]: Attempting delivery to <%s> @ <%s> (%s)\n",
 422                       SendMsg->n, SendMsg->user, SendMsg->node, SendMsg->name);
 423         /* If no envelope_from is supplied, extract one from the message */
 424         if ( (SendMsg->envelope_from == NULL) ||
 425              (IsEmptyStr(SendMsg->envelope_from)) ) {
 426                 SendMsg->mailfrom[0] = '\0';
 427                 scan_done = 0;
 428                 ptr = ChrPtr(SendMsg->msgtext);
 429                 do {
 430                         if (ptr = cmemreadline(ptr, buf, sizeof buf), *ptr == 0) {
 431                                 scan_done = 1;
 432                         }
 433                         if (!strncasecmp(buf, "From:", 5)) {
 434                                 safestrncpy(SendMsg->mailfrom, &buf[5], sizeof SendMsg->mailfrom);
 435                                 striplt(SendMsg->mailfrom);
 436                                 for (i=0; SendMsg->mailfrom[i]; ++i) {
 437                                         if (!isprint(SendMsg->mailfrom[i])) {
 438                                                 strcpy(&SendMsg->mailfrom[i], &SendMsg->mailfrom[i+1]);
 439                                                 i=0;
 440                                         }
 441                                 }
 442
 443                                 /* Strip out parenthesized names */
 444                                 lp = (-1);
 445                                 rp = (-1);
 446                                 for (i=0; !IsEmptyStr(SendMsg->mailfrom + i); ++i) {
 447                                         if (SendMsg->mailfrom[i] == '(') lp = i;
 448                                         if (SendMsg->mailfrom[i] == ')') rp = i;
 449                                 }
 450                                 if ((lp>0)&&(rp>lp)) {
 451                                         strcpy(&SendMsg->mailfrom[lp-1], &SendMsg->mailfrom[rp+1]);
 452                                 }
 453
 454                                 /* Prefer brokketized names */
 455                                 lp = (-1);
 456                                 rp = (-1);
 457                                 for (i=0; !IsEmptyStr(SendMsg->mailfrom + i); ++i) {
 458                                         if (SendMsg->mailfrom[i] == '<') lp = i;
 459                                         if (SendMsg->mailfrom[i] == '>') rp = i;
 460                                 }
 461                                 if ( (lp>=0) && (rp>lp) ) {
 462                                         SendMsg->mailfrom[rp] = 0;
 463                                         memmove(SendMsg->mailfrom,
 464                                                 &SendMsg->mailfrom[lp + 1],
 465                                                 rp - lp);
 466                                 }
 467
 468                                 scan_done = 1;
 469                         }
 470                 } while (scan_done == 0);
 471                 if (IsEmptyStr(SendMsg->mailfrom)) strcpy(SendMsg->mailfrom, "someone@somewhere.org");
 472                 stripallbut(SendMsg->mailfrom, '<', '>');
 473                 SendMsg->envelope_from = SendMsg->mailfrom;
 474         }
 475
 476         return 1;
 477 }
 478
 479
 480
 481 void smtp_try(OneQueItem *MyQItem,
 482               MailQEntry *MyQEntry,
 483               StrBuf *MsgText,
 484               int KeepMsgText,  /* KeepMsgText allows us to use MsgText as ours. */
 485               int MsgCount)
 486 {
 487         SmtpOutMsg * SendMsg;
 488
 489         CtdlLogPrintf(CTDL_DEBUG, "SMTP: %s\n", __FUNCTION__);
 490
 491         SendMsg = (SmtpOutMsg *) malloc(sizeof(SmtpOutMsg));
 492         memset(SendMsg, 0, sizeof(SmtpOutMsg));
 493         SendMsg->IO.sock = (-1);
 494         SendMsg->n = MsgCount++;
 495         SendMsg->MyQEntry = MyQEntry;
 496         SendMsg->MyQItem = MyQItem;
 497         SendMsg->IO.Data = SendMsg;
 498         if (KeepMsgText)
 499                 SendMsg->msgtext = MsgText;
 500         else
 501                 SendMsg->msgtext = NewStrBufDup(MsgText);
 502
 503         if (smtp_resolve_recipients(SendMsg)) {
 504                 QueueEventContext(SendMsg,
 505                                   &SendMsg->IO,
 506                                   resolve_mx_records);
 507         }
 508         else {
 509                 if ((SendMsg==NULL) ||
 510                     (SendMsg->MyQEntry == NULL)) {
 511                         SendMsg->MyQEntry->Status = 5;
 512                         StrBufPlain(SendMsg->MyQEntry->StatusMessage,
 513                                     HKEY("Invalid Recipient!"));
 514                 }
 515                 FinalizeMessageSend(SendMsg);
 516         }
 517 }
 518
 519
 520
 521
 522
 523 /*****************************************************************************/
 524 /*                     SMTP CLIENT STATE CALLBACKS                           */
 525 /*****************************************************************************/
 526 eNextState SMTPC_read_greeting(SmtpOutMsg *SendMsg)
 527 {
 528         /* Process the SMTP greeting from the server */
 529         SMTP_DBG_READ();
 530
 531         if (!SMTP_IS_STATE('2')) {
 532                 if (SMTP_IS_STATE('4'))
 533                         SMTP_VERROR(4);
 534                 else
 535                         SMTP_VERROR(5);
 536         }
 537         return eSendReply;
 538 }
 539
 540 eNextState SMTPC_send_EHLO(SmtpOutMsg *SendMsg)
 541 {
 542         /* At this point we know we are talking to a real SMTP server */
 543
 544         /* Do a EHLO command.  If it fails, try the HELO command. */
 545         StrBufPrintf(SendMsg->IO.SendBuf.Buf,
 546                      "EHLO %s\r\n", config.c_fqdn);
 547
 548         SMTP_DBG_SEND();
 549         return eReadMessage;
 550 }
 551
 552 eNextState SMTPC_read_EHLO_reply(SmtpOutMsg *SendMsg)
 553 {
 554         SMTP_DBG_READ();
 555
 556         if (SMTP_IS_STATE('2')) {
 557                 SendMsg->State ++;
 558                 if (IsEmptyStr(SendMsg->mx_user))
 559                         SendMsg->State ++; /* Skip auth... */
 560         }
 561         /* else we fall back to 'helo' */
 562         return eSendReply;
 563 }
 564
 565 eNextState STMPC_send_HELO(SmtpOutMsg *SendMsg)
 566 {
 567         StrBufPrintf(SendMsg->IO.SendBuf.Buf,
 568                      "HELO %s\r\n", config.c_fqdn);
 569
 570         SMTP_DBG_SEND();
 571         return eReadMessage;
 572 }
 573
 574 eNextState SMTPC_read_HELO_reply(SmtpOutMsg *SendMsg)
 575 {
 576         SMTP_DBG_READ();
 577
 578         if (!SMTP_IS_STATE('2')) {
 579                 if (SMTP_IS_STATE('4'))
 580                         SMTP_VERROR(4);
 581                 else
 582                         SMTP_VERROR(5);
 583         }
 584         if (!IsEmptyStr(SendMsg->mx_user))
 585                 SendMsg->State ++; /* Skip auth... */
 586         return eSendReply;
 587 }
 588
 589 eNextState SMTPC_send_auth(SmtpOutMsg *SendMsg)
 590 {
 591         char buf[SIZ];
 592         char encoded[1024];
 593
 594         /* Do an AUTH command if necessary */
 595         sprintf(buf, "%s%c%s%c%s",
 596                 SendMsg->mx_user, '\0',
 597                 SendMsg->mx_user, '\0',
 598                 SendMsg->mx_pass);
 599         CtdlEncodeBase64(encoded, buf,
 600                          strlen(SendMsg->mx_user) +
 601                          strlen(SendMsg->mx_user) +
 602                          strlen(SendMsg->mx_pass) + 2, 0);
 603         StrBufPrintf(SendMsg->IO.SendBuf.Buf,
 604                      "AUTH PLAIN %s\r\n", encoded);
 605
 606         SMTP_DBG_SEND();
 607         return eReadMessage;
 608 }
 609
 610 eNextState SMTPC_read_auth_reply(SmtpOutMsg *SendMsg)
 611 {
 612         /* Do an AUTH command if necessary */
 613
 614         SMTP_DBG_READ();
 615
 616         if (!SMTP_IS_STATE('2')) {
 617                 if (SMTP_IS_STATE('4'))
 618                         SMTP_VERROR(4);
 619                 else
 620                         SMTP_VERROR(5);
 621         }
 622         return eSendReply;
 623 }
 624
 625 eNextState SMTPC_send_FROM(SmtpOutMsg *SendMsg)
 626 {
 627         /* previous command succeeded, now try the MAIL FROM: command */
 628         StrBufPrintf(SendMsg->IO.SendBuf.Buf,
 629                      "MAIL FROM:<%s>\r\n",
 630                      SendMsg->envelope_from);
 631
 632         SMTP_DBG_SEND();
 633         return eReadMessage;
 634 }
 635
 636 eNextState SMTPC_read_FROM_reply(SmtpOutMsg *SendMsg)
 637 {
 638         SMTP_DBG_READ();
 639
 640         if (!SMTP_IS_STATE('2')) {
 641                 if (SMTP_IS_STATE('4'))
 642                         SMTP_VERROR(4);
 643                 else
 644                         SMTP_VERROR(5);
 645         }
 646         return eSendReply;
 647 }
 648
 649
 650 eNextState SMTPC_send_RCPT(SmtpOutMsg *SendMsg)
 651 {
 652         /* MAIL succeeded, now try the RCPT To: command */
 653         StrBufPrintf(SendMsg->IO.SendBuf.Buf,
 654                      "RCPT TO:<%s@%s>\r\n",
 655                      SendMsg->user,
 656                      SendMsg->node);
 657
 658         SMTP_DBG_SEND();
 659         return eReadMessage;
 660 }
 661
 662 eNextState SMTPC_read_RCPT_reply(SmtpOutMsg *SendMsg)
 663 {
 664         SMTP_DBG_READ();
 665
 666         if (!SMTP_IS_STATE('2')) {
 667                 if (SMTP_IS_STATE('4'))
 668                         SMTP_VERROR(4);
 669                 else
 670                         SMTP_VERROR(5);
 671         }
 672         return eSendReply;
 673 }
 674
 675 eNextState SMTPC_send_DATAcmd(SmtpOutMsg *SendMsg)
 676 {
 677         /* RCPT succeeded, now try the DATA command */
 678         StrBufPlain(SendMsg->IO.SendBuf.Buf,
 679                     HKEY("DATA\r\n"));
 680
 681         SMTP_DBG_SEND();
 682         return eReadMessage;
 683 }
 684
 685 eNextState SMTPC_read_DATAcmd_reply(SmtpOutMsg *SendMsg)
 686 {
 687         SMTP_DBG_READ();
 688
 689         if (!SMTP_IS_STATE('3')) {
 690                 if (SMTP_IS_STATE('4'))
 691                         SMTP_VERROR(3);
 692                 else
 693                         SMTP_VERROR(5);
 694         }
 695         return eSendReply;
 696 }
 697
 698 eNextState SMTPC_send_data_body(SmtpOutMsg *SendMsg)
 699 {
 700         StrBuf *Buf;
 701         /* If we reach this point, the server is expecting data.*/
 702
 703         Buf = SendMsg->IO.SendBuf.Buf;
 704         SendMsg->IO.SendBuf.Buf = SendMsg->msgtext;
 705         SendMsg->msgtext = Buf;
 706         SendMsg->State ++;
 707
 708         return eSendMore;
 709 }
 710
 711 eNextState SMTPC_send_terminate_data_body(SmtpOutMsg *SendMsg)
 712 {
 713         StrBuf *Buf;
 714
 715         Buf = SendMsg->IO.SendBuf.Buf;
 716         SendMsg->IO.SendBuf.Buf = SendMsg->msgtext;
 717         SendMsg->msgtext = Buf;
 718
 719         StrBufPlain(SendMsg->IO.SendBuf.Buf,
 720                     HKEY(".\r\n"));
 721
 722         return eReadMessage;
 723
 724 }
 725
 726 eNextState SMTPC_read_data_body_reply(SmtpOutMsg *SendMsg)
 727 {
 728         SMTP_DBG_READ();
 729
 730         if (!SMTP_IS_STATE('2')) {
 731                 if (SMTP_IS_STATE('4'))
 732                         SMTP_VERROR(4);
 733                 else
 734                         SMTP_VERROR(5);
 735         }
 736
 737         /* We did it! */
 738         StrBufPlain(SendMsg->MyQEntry->StatusMessage,
 739                     &ChrPtr(SendMsg->IO.RecvBuf.Buf)[4],
 740                     StrLength(SendMsg->IO.RecvBuf.Buf) - 4);
 741         SendMsg->MyQEntry->Status = 2;
 742         return eSendReply;
 743 }
 744
 745 eNextState SMTPC_send_QUIT(SmtpOutMsg *SendMsg)
 746 {
 747         StrBufPlain(SendMsg->IO.SendBuf.Buf,
 748                     HKEY("QUIT\r\n"));
 749
 750         SMTP_DBG_SEND();
 751         return eReadMessage;
 752 }
 753
 754 eNextState SMTPC_read_QUIT_reply(SmtpOutMsg *SendMsg)
 755 {
 756         SMTP_DBG_READ();
 757
 758         CtdlLogPrintf(CTDL_INFO, "SMTP client[%ld]: delivery to <%s> @ <%s> (%s) succeeded\n",
 759                       SendMsg->n, SendMsg->user, SendMsg->node, SendMsg->name);
 760         return eTerminateConnection;
 761 }
 762
 763 eNextState SMTPC_read_dummy(SmtpOutMsg *SendMsg)
 764 {
 765         return eSendReply;
 766 }
 767
 768 eNextState SMTPC_send_dummy(SmtpOutMsg *SendMsg)
 769 {
 770         return eReadMessage;
 771 }
 772
 773
 774 /*****************************************************************************/
 775 /*                     SMTP CLIENT DISPATCHER                                */
 776 /*****************************************************************************/
 777 SMTPReadHandler ReadHandlers[eMaxSMTPC] = {
 778         SMTPC_read_greeting,
 779         SMTPC_read_EHLO_reply,
 780         SMTPC_read_HELO_reply,
 781         SMTPC_read_auth_reply,
 782         SMTPC_read_FROM_reply,
 783         SMTPC_read_RCPT_reply,
 784         SMTPC_read_DATAcmd_reply,
 785         SMTPC_read_dummy,
 786         SMTPC_read_data_body_reply,
 787         SMTPC_read_QUIT_reply
 788 };
 789 SMTPSendHandler SendHandlers[eMaxSMTPC] = {
 790         SMTPC_send_dummy, /* we don't send a greeting, the server does... */
 791         SMTPC_send_EHLO,
 792         STMPC_send_HELO,
 793         SMTPC_send_auth,
 794         SMTPC_send_FROM,
 795         SMTPC_send_RCPT,
 796         SMTPC_send_DATAcmd,
 797         SMTPC_send_data_body,
 798         SMTPC_send_terminate_data_body,
 799         SMTPC_send_QUIT
 800 };
 801
 802 void SMTPSetTimeout(eNextState NextTCPState, SmtpOutMsg *pMsg)
 803 {
 804         CtdlLogPrintf(CTDL_DEBUG, "SMTP: %s\n", __FUNCTION__);
 805         double Timeout;
 806         switch (NextTCPState) {
 807         case eSendReply:
 808         case eSendMore:
 809                 Timeout = SMTP_C_SendTimeouts[pMsg->State];
 810                 if (pMsg->State == eDATABody) {
 811                         /* if we're sending a huge message, we need more time. */
 812                         Timeout += StrLength(pMsg->msgtext) / 1024;
 813                 }
 814                 break;
 815         case eReadMessage:
 816                 Timeout = SMTP_C_ReadTimeouts[pMsg->State];
 817                 if (pMsg->State == eDATATerminateBody) {
 818                         /*
 819                          * some mailservers take a nap before accepting the message
 820                          * content inspection and such.
 821                          */
 822                         Timeout += StrLength(pMsg->msgtext) / 1024;
 823                 }
 824                 break;
 825         case eTerminateConnection:
 826         case eAbort:
 827                 return;
 828         }
 829         SetNextTimeout(&pMsg->IO, Timeout);
 830 }
 831 eNextState SMTP_C_DispatchReadDone(AsyncIO *IO)
 832 {
 833         CtdlLogPrintf(CTDL_DEBUG, "SMTP: %s\n", __FUNCTION__);
 834         SmtpOutMsg *pMsg = IO->Data;
 835         eNextState rc;
 836
 837         rc = ReadHandlers[pMsg->State](pMsg);
 838         pMsg->State++;
 839         SMTPSetTimeout(rc, pMsg);
 840         return rc;
 841 }
 842 eNextState SMTP_C_DispatchWriteDone(AsyncIO *IO)
 843 {
 844         CtdlLogPrintf(CTDL_DEBUG, "SMTP: %s\n", __FUNCTION__);
 845         SmtpOutMsg *pMsg = IO->Data;
 846         eNextState rc;
 847
 848         rc = SendHandlers[pMsg->State](pMsg);
 849         SMTPSetTimeout(rc, pMsg);
 850         return rc;
 851 }
 852
 853
 854 /*****************************************************************************/
 855 /*                     SMTP CLIENT ERROR CATCHERS                            */
 856 /*****************************************************************************/
 857 eNextState SMTP_C_Terminate(AsyncIO *IO)
 858 {
 859         CtdlLogPrintf(CTDL_DEBUG, "SMTP: %s\n", __FUNCTION__);
 860         SmtpOutMsg *pMsg = IO->Data;
 861         FinalizeMessageSend(pMsg);
 862         return 0;
 863 }
 864 eNextState SMTP_C_Timeout(AsyncIO *IO)
 865 {
 866         CtdlLogPrintf(CTDL_DEBUG, "SMTP: %s\n", __FUNCTION__);
 867         SmtpOutMsg *pMsg = IO->Data;
 868         StrBufPlain(IO->ErrMsg, CKEY(ReadErrors[pMsg->State]));
 869         FinalizeMessageSend(pMsg);
 870         return 0;
 871 }
 872 eNextState SMTP_C_ConnFail(AsyncIO *IO)
 873 {
 874         CtdlLogPrintf(CTDL_DEBUG, "SMTP: %s\n", __FUNCTION__);
 875         SmtpOutMsg *pMsg = IO->Data;
 876         FinalizeMessageSend(pMsg);
 877         return 0;
 878 }
 879
 880
 881 /**
 882  * @brief lineread Handler; understands when to read more SMTP lines, and when this is a one-lined reply.
 883  */
 884 eReadState SMTP_C_ReadServerStatus(AsyncIO *IO)
 885 {
 886         eReadState Finished = eBufferNotEmpty;
 887
 888         while (Finished == eBufferNotEmpty) {
 889                 Finished = StrBufChunkSipLine(IO->IOBuf, &IO->RecvBuf);
 890
 891                 switch (Finished) {
 892                 case eMustReadMore: /// read new from socket...
 893                         return Finished;
 894                         break;
 895                 case eBufferNotEmpty: /* shouldn't happen... */
 896                 case eReadSuccess: /// done for now...
 897                         if (StrLength(IO->IOBuf) < 4)
 898                                 continue;
 899                         if (ChrPtr(IO->IOBuf)[3] == '-')
 900                                 Finished = eBufferNotEmpty;
 901                         else
 902                                 return Finished;
 903                         break;
 904                 case eReadFail: /// WHUT?
 905                         ///todo: shut down!
 906                         break;
 907                 }
 908         }
 909         return Finished;
 910 }
 911
 912
 913 #endif
 914 CTDL_MODULE_INIT(smtp_eventclient)
 915 {
 916         return "smtpeventclient";
 917 }