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 long SMTP_C_ConnTimeout = 60; /* wail 1 minute for connections... */
 112 const long 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         0, /* end of body... */
 122         30  /* QUIT */
 123 };
 124 const long 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                         /* Generate 'bounce' messages */
 248                         smtp_do_bounce(msg->cm_fields['M'],
 249                                        Msg->msgtext);
 250
 251                         CtdlSubmitMsg(msg, NULL, SMTP_SPOOLOUT_ROOM, QP_EADDR);
 252                         CtdlFreeMessage(msg);
 253                 }
 254                 else
 255                         CtdlDeleteMessages(SMTP_SPOOLOUT_ROOM, &Msg->MyQItem->MessageID, 1, "");
 256
 257                 RemoveQItem(Msg->MyQItem);
 258         }
 259         DeleteSmtpOutMsg(Msg);
 260 }
 261
 262
 263
 264
 265 void get_one_mx_host_ip_done(void *Ctx,
 266                              int status,
 267                              int timeouts,
 268                              struct hostent *hostent)
 269 {
 270         AsyncIO *IO = Ctx;
 271         SmtpOutMsg *SendMsg = IO->Data;
 272         CtdlLogPrintf(CTDL_DEBUG, "SMTP: %s\n", __FUNCTION__);
 273         if ((status == ARES_SUCCESS) && (hostent != NULL) ) {
 274                 unsigned long psaddr;
 275                 // TODO: IPV6
 276                 memcpy(&psaddr, hostent->h_addr_list[0], sizeof(psaddr));
 277                 psaddr = ntohl(psaddr);
 278
 279                 CtdlLogPrintf(CTDL_DEBUG,
 280                               "SMTP client[%ld]: connecting to %s [%ld.%ld.%ld.%ld:%d] ...\n",
 281                               SendMsg->n,
 282                               SendMsg->mx_host,
 283                               (psaddr >> 24) & 0xFF,
 284                               (psaddr >> 16) & 0xFF,
 285                               (psaddr >>  8) & 0xFF,
 286                               (psaddr >>  0) & 0xFF,
 287                               SendMsg->IO.dport);
 288
 289                 SendMsg->MyQEntry->Status = 5;
 290                 StrBufPrintf(SendMsg->MyQEntry->StatusMessage,
 291                              "Timeout while connecting %s [%ld.%ld.%ld.%ld:%d] ",
 292                              SendMsg->mx_host,
 293                              (psaddr >> 24) & 0xFF,
 294                              (psaddr >> 16) & 0xFF,
 295                              (psaddr >>  8) & 0xFF,
 296                              (psaddr >>  0) & 0xFF,
 297                              SendMsg->IO.dport);
 298
 299                 SendMsg->IO.HEnt = hostent;
 300                 InitEventIO(IO, SendMsg,
 301                             SMTP_C_DispatchReadDone,
 302                             SMTP_C_DispatchWriteDone,
 303                             SMTP_C_Terminate,
 304                             SMTP_C_Timeout,
 305                             SMTP_C_ConnFail,
 306                             SMTP_C_ReadServerStatus,
 307                             SMTP_C_ConnTimeout,
 308                             SMTP_C_ReadTimeouts[0],
 309                             1);
 310
 311         }
 312 }
 313
 314 const unsigned short DefaultMXPort = 25;
 315 void get_one_mx_host_ip(SmtpOutMsg *SendMsg)
 316 {
 317         //char *endpart;
 318         //char buf[SIZ];
 319
 320         CtdlLogPrintf(CTDL_DEBUG, "SMTP: %s\n", __FUNCTION__);
 321         SendMsg->IO.dport = DefaultMXPort;
 322
 323
 324 /* TODO: Relay!
 325         *SendMsg->mx_user =  '\0';
 326         *SendMsg->mx_pass = '\0';
 327         if (num_tokens(buf, '@') > 1) {
 328                 strcpy (SendMsg->mx_user, buf);
 329                 endpart = strrchr(SendMsg->mx_user, '@');
 330                 *endpart = '\0';
 331                 strcpy (SendMsg->mx_host, endpart + 1);
 332                 endpart = strrchr(SendMsg->mx_user, ':');
 333                 if (endpart != NULL) {
 334                         strcpy(SendMsg->mx_pass, endpart+1);
 335                         *endpart = '\0';
 336                 }
 337
 338         endpart = strrchr(SendMsg->mx_host, ':');
 339         if (endpart != 0){
 340                 *endpart = '\0';
 341                 strcpy(SendMsg->mx_port, endpart + 1);
 342         }
 343         }
 344         else
 345 */
 346         SendMsg->mx_host = SendMsg->CurrMX->host;
 347         SendMsg->CurrMX = SendMsg->CurrMX->next;
 348
 349         CtdlLogPrintf(CTDL_DEBUG,
 350                       "SMTP client[%ld]: looking up %s : %d ...\n",
 351                       SendMsg->n,
 352                       SendMsg->mx_host,
 353                       SendMsg->IO.dport);
 354
 355         ares_gethostbyname(SendMsg->IO.DNSChannel,
 356                            SendMsg->mx_host,
 357                            AF_INET6, /* it falls back to ipv4 in doubt... */
 358                            get_one_mx_host_ip_done,
 359                            &SendMsg->IO);
 360 }
 361
 362
 363 eNextState smtp_resolve_mx_done(AsyncIO *IO)
 364 {
 365         SmtpOutMsg * SendMsg = IO->Data;
 366
 367         CtdlLogPrintf(CTDL_DEBUG, "SMTP: %s\n", __FUNCTION__);
 368
 369         SendMsg->IO.SendBuf.Buf = NewStrBufPlain(NULL, 1024);
 370         SendMsg->IO.RecvBuf.Buf = NewStrBufPlain(NULL, 1024);
 371         SendMsg->IO.IOBuf = NewStrBuf();
 372         SendMsg->IO.ErrMsg = SendMsg->MyQEntry->StatusMessage;
 373
 374         SendMsg->CurrMX = SendMsg->AllMX = IO->VParsedDNSReply;
 375         //// TODO: should we remove the current ares context???
 376         get_one_mx_host_ip(SendMsg);
 377         return 0;
 378 }
 379
 380
 381 int resolve_mx_records(void *Ctx)
 382 {
 383         SmtpOutMsg * SendMsg = Ctx;
 384
 385         CtdlLogPrintf(CTDL_DEBUG, "SMTP: %s\n", __FUNCTION__);
 386
 387         if (!QueueQuery(ns_t_mx,
 388                         SendMsg->node,
 389                         &SendMsg->IO,
 390                         smtp_resolve_mx_done))
 391         {
 392                 SendMsg->MyQEntry->Status = 5;
 393                 StrBufPrintf(SendMsg->MyQEntry->StatusMessage,
 394                              "No MX hosts found for <%s>", SendMsg->node);
 395                 return 0; ///////TODO: abort!
 396         }
 397         return 0;
 398 }
 399
 400
 401 int smtp_resolve_recipients(SmtpOutMsg *SendMsg)
 402 {
 403         const char *ptr;
 404         char buf[1024];
 405         int scan_done;
 406         int lp, rp;
 407         int i;
 408
 409         CtdlLogPrintf(CTDL_DEBUG, "SMTP: %s\n", __FUNCTION__);
 410
 411         if ((SendMsg==NULL) ||
 412             (SendMsg->MyQEntry == NULL) ||
 413             (StrLength(SendMsg->MyQEntry->Recipient) == 0)) {
 414                 return 0;
 415         }
 416
 417         /* Parse out the host portion of the recipient address */
 418         process_rfc822_addr(ChrPtr(SendMsg->MyQEntry->Recipient),
 419                             SendMsg->user,
 420                             SendMsg->node,
 421                             SendMsg->name);
 422
 423         CtdlLogPrintf(CTDL_DEBUG, "SMTP client[%ld]: Attempting delivery to <%s> @ <%s> (%s)\n",
 424                       SendMsg->n, SendMsg->user, SendMsg->node, SendMsg->name);
 425         /* If no envelope_from is supplied, extract one from the message */
 426         if ( (SendMsg->envelope_from == NULL) ||
 427              (IsEmptyStr(SendMsg->envelope_from)) ) {
 428                 SendMsg->mailfrom[0] = '\0';
 429                 scan_done = 0;
 430                 ptr = ChrPtr(SendMsg->msgtext);
 431                 do {
 432                         if (ptr = cmemreadline(ptr, buf, sizeof buf), *ptr == 0) {
 433                                 scan_done = 1;
 434                         }
 435                         if (!strncasecmp(buf, "From:", 5)) {
 436                                 safestrncpy(SendMsg->mailfrom, &buf[5], sizeof SendMsg->mailfrom);
 437                                 striplt(SendMsg->mailfrom);
 438                                 for (i=0; SendMsg->mailfrom[i]; ++i) {
 439                                         if (!isprint(SendMsg->mailfrom[i])) {
 440                                                 strcpy(&SendMsg->mailfrom[i], &SendMsg->mailfrom[i+1]);
 441                                                 i=0;
 442                                         }
 443                                 }
 444
 445                                 /* Strip out parenthesized names */
 446                                 lp = (-1);
 447                                 rp = (-1);
 448                                 for (i=0; !IsEmptyStr(SendMsg->mailfrom + i); ++i) {
 449                                         if (SendMsg->mailfrom[i] == '(') lp = i;
 450                                         if (SendMsg->mailfrom[i] == ')') rp = i;
 451                                 }
 452                                 if ((lp>0)&&(rp>lp)) {
 453                                         strcpy(&SendMsg->mailfrom[lp-1], &SendMsg->mailfrom[rp+1]);
 454                                 }
 455
 456                                 /* Prefer brokketized names */
 457                                 lp = (-1);
 458                                 rp = (-1);
 459                                 for (i=0; !IsEmptyStr(SendMsg->mailfrom + i); ++i) {
 460                                         if (SendMsg->mailfrom[i] == '<') lp = i;
 461                                         if (SendMsg->mailfrom[i] == '>') rp = i;
 462                                 }
 463                                 if ( (lp>=0) && (rp>lp) ) {
 464                                         SendMsg->mailfrom[rp] = 0;
 465                                         memmove(SendMsg->mailfrom,
 466                                                 &SendMsg->mailfrom[lp + 1],
 467                                                 rp - lp);
 468                                 }
 469
 470                                 scan_done = 1;
 471                         }
 472                 } while (scan_done == 0);
 473                 if (IsEmptyStr(SendMsg->mailfrom)) strcpy(SendMsg->mailfrom, "someone@somewhere.org");
 474                 stripallbut(SendMsg->mailfrom, '<', '>');
 475                 SendMsg->envelope_from = SendMsg->mailfrom;
 476         }
 477
 478         return 1;
 479 }
 480
 481
 482
 483 void smtp_try(OneQueItem *MyQItem,
 484               MailQEntry *MyQEntry,
 485               StrBuf *MsgText,
 486               int KeepMsgText,  /* KeepMsgText allows us to use MsgText as ours. */
 487               int MsgCount)
 488 {
 489         SmtpOutMsg * SendMsg;
 490
 491         CtdlLogPrintf(CTDL_DEBUG, "SMTP: %s\n", __FUNCTION__);
 492
 493         SendMsg = (SmtpOutMsg *) malloc(sizeof(SmtpOutMsg));
 494         memset(SendMsg, 0, sizeof(SmtpOutMsg));
 495         SendMsg->IO.sock = (-1);
 496         SendMsg->n = MsgCount++;
 497         SendMsg->MyQEntry = MyQEntry;
 498         SendMsg->MyQItem = MyQItem;
 499         SendMsg->IO.Data = SendMsg;
 500         if (KeepMsgText)
 501                 SendMsg->msgtext = MsgText;
 502         else
 503                 SendMsg->msgtext = NewStrBufDup(MsgText);
 504
 505         if (smtp_resolve_recipients(SendMsg)) {
 506                 QueueEventContext(SendMsg,
 507                                   &SendMsg->IO,
 508                                   resolve_mx_records);
 509         }
 510         else {
 511                 if ((SendMsg==NULL) ||
 512                     (SendMsg->MyQEntry == NULL)) {
 513                         SendMsg->MyQEntry->Status = 5;
 514                         StrBufPlain(SendMsg->MyQEntry->StatusMessage,
 515                                     HKEY("Invalid Recipient!"));
 516                 }
 517                 FinalizeMessageSend(SendMsg);
 518         }
 519 }
 520
 521
 522
 523
 524
 525 /*****************************************************************************/
 526 /*                     SMTP CLIENT STATE CALLBACKS                           */
 527 /*****************************************************************************/
 528 eNextState SMTPC_read_greeting(SmtpOutMsg *SendMsg)
 529 {
 530         /* Process the SMTP greeting from the server */
 531         SMTP_DBG_READ();
 532
 533         if (!SMTP_IS_STATE('2')) {
 534                 if (SMTP_IS_STATE('4'))
 535                         SMTP_VERROR(4);
 536                 else
 537                         SMTP_VERROR(5);
 538         }
 539         return eSendReply;
 540 }
 541
 542 eNextState SMTPC_send_EHLO(SmtpOutMsg *SendMsg)
 543 {
 544         /* At this point we know we are talking to a real SMTP server */
 545
 546         /* Do a EHLO command.  If it fails, try the HELO command. */
 547         StrBufPrintf(SendMsg->IO.SendBuf.Buf,
 548                      "EHLO %s\r\n", config.c_fqdn);
 549
 550         SMTP_DBG_SEND();
 551         return eReadMessage;
 552 }
 553
 554 eNextState SMTPC_read_EHLO_reply(SmtpOutMsg *SendMsg)
 555 {
 556         SMTP_DBG_READ();
 557
 558         if (SMTP_IS_STATE('2')) {
 559                 SendMsg->State ++;
 560                 if (IsEmptyStr(SendMsg->mx_user))
 561                         SendMsg->State ++; /* Skip auth... */
 562         }
 563         /* else we fall back to 'helo' */
 564         return eSendReply;
 565 }
 566
 567 eNextState STMPC_send_HELO(SmtpOutMsg *SendMsg)
 568 {
 569         StrBufPrintf(SendMsg->IO.SendBuf.Buf,
 570                      "HELO %s\r\n", config.c_fqdn);
 571
 572         SMTP_DBG_SEND();
 573         return eReadMessage;
 574 }
 575
 576 eNextState SMTPC_read_HELO_reply(SmtpOutMsg *SendMsg)
 577 {
 578         SMTP_DBG_READ();
 579
 580         if (!SMTP_IS_STATE('2')) {
 581                 if (SMTP_IS_STATE('4'))
 582                         SMTP_VERROR(4);
 583                 else
 584                         SMTP_VERROR(5);
 585         }
 586         if (!IsEmptyStr(SendMsg->mx_user))
 587                 SendMsg->State ++; /* Skip auth... */
 588         return eSendReply;
 589 }
 590
 591 eNextState SMTPC_send_auth(SmtpOutMsg *SendMsg)
 592 {
 593         char buf[SIZ];
 594         char encoded[1024];
 595
 596         /* Do an AUTH command if necessary */
 597         sprintf(buf, "%s%c%s%c%s",
 598                 SendMsg->mx_user, '\0',
 599                 SendMsg->mx_user, '\0',
 600                 SendMsg->mx_pass);
 601         CtdlEncodeBase64(encoded, buf,
 602                          strlen(SendMsg->mx_user) +
 603                          strlen(SendMsg->mx_user) +
 604                          strlen(SendMsg->mx_pass) + 2, 0);
 605         StrBufPrintf(SendMsg->IO.SendBuf.Buf,
 606                      "AUTH PLAIN %s\r\n", encoded);
 607
 608         SMTP_DBG_SEND();
 609         return eReadMessage;
 610 }
 611
 612 eNextState SMTPC_read_auth_reply(SmtpOutMsg *SendMsg)
 613 {
 614         /* Do an AUTH command if necessary */
 615
 616         SMTP_DBG_READ();
 617
 618         if (!SMTP_IS_STATE('2')) {
 619                 if (SMTP_IS_STATE('4'))
 620                         SMTP_VERROR(4);
 621                 else
 622                         SMTP_VERROR(5);
 623         }
 624         return eSendReply;
 625 }
 626
 627 eNextState SMTPC_send_FROM(SmtpOutMsg *SendMsg)
 628 {
 629         /* previous command succeeded, now try the MAIL FROM: command */
 630         StrBufPrintf(SendMsg->IO.SendBuf.Buf,
 631                      "MAIL FROM:<%s>\r\n",
 632                      SendMsg->envelope_from);
 633
 634         SMTP_DBG_SEND();
 635         return eReadMessage;
 636 }
 637
 638 eNextState SMTPC_read_FROM_reply(SmtpOutMsg *SendMsg)
 639 {
 640         SMTP_DBG_READ();
 641
 642         if (!SMTP_IS_STATE('2')) {
 643                 if (SMTP_IS_STATE('4'))
 644                         SMTP_VERROR(4);
 645                 else
 646                         SMTP_VERROR(5);
 647         }
 648         return eSendReply;
 649 }
 650
 651
 652 eNextState SMTPC_send_RCPT(SmtpOutMsg *SendMsg)
 653 {
 654         /* MAIL succeeded, now try the RCPT To: command */
 655         StrBufPrintf(SendMsg->IO.SendBuf.Buf,
 656                      "RCPT TO:<%s@%s>\r\n",
 657                      SendMsg->user,
 658                      SendMsg->node);
 659
 660         SMTP_DBG_SEND();
 661         return eReadMessage;
 662 }
 663
 664 eNextState SMTPC_read_RCPT_reply(SmtpOutMsg *SendMsg)
 665 {
 666         SMTP_DBG_READ();
 667
 668         if (!SMTP_IS_STATE('2')) {
 669                 if (SMTP_IS_STATE('4'))
 670                         SMTP_VERROR(4);
 671                 else
 672                         SMTP_VERROR(5);
 673         }
 674         return eSendReply;
 675 }
 676
 677 eNextState SMTPC_send_DATAcmd(SmtpOutMsg *SendMsg)
 678 {
 679         /* RCPT succeeded, now try the DATA command */
 680         StrBufPlain(SendMsg->IO.SendBuf.Buf,
 681                     HKEY("DATA\r\n"));
 682
 683         SMTP_DBG_SEND();
 684         return eReadMessage;
 685 }
 686
 687 eNextState SMTPC_read_DATAcmd_reply(SmtpOutMsg *SendMsg)
 688 {
 689         SMTP_DBG_READ();
 690
 691         if (!SMTP_IS_STATE('3')) {
 692                 if (SMTP_IS_STATE('4'))
 693                         SMTP_VERROR(3);
 694                 else
 695                         SMTP_VERROR(5);
 696         }
 697         return eSendReply;
 698 }
 699
 700 eNextState SMTPC_send_data_body(SmtpOutMsg *SendMsg)
 701 {
 702         StrBuf *Buf;
 703         /* If we reach this point, the server is expecting data.*/
 704
 705         Buf = SendMsg->IO.SendBuf.Buf;
 706         SendMsg->IO.SendBuf.Buf = SendMsg->msgtext;
 707         SendMsg->msgtext = Buf;
 708         //// TODO timeout like that: (SendMsg->msg_size / 128) + 50);
 709         SendMsg->State ++;
 710
 711         return eSendMore;
 712 }
 713
 714 eNextState SMTPC_send_terminate_data_body(SmtpOutMsg *SendMsg)
 715 {
 716         StrBuf *Buf;
 717
 718         Buf = SendMsg->IO.SendBuf.Buf;
 719         SendMsg->IO.SendBuf.Buf = SendMsg->msgtext;
 720         SendMsg->msgtext = Buf;
 721
 722         StrBufPlain(SendMsg->IO.SendBuf.Buf,
 723                     HKEY(".\r\n"));
 724
 725         return eReadMessage;
 726
 727 }
 728
 729 eNextState SMTPC_read_data_body_reply(SmtpOutMsg *SendMsg)
 730 {
 731         SMTP_DBG_READ();
 732
 733         if (!SMTP_IS_STATE('2')) {
 734                 if (SMTP_IS_STATE('4'))
 735                         SMTP_VERROR(4);
 736                 else
 737                         SMTP_VERROR(5);
 738         }
 739
 740         /* We did it! */
 741         StrBufPlain(SendMsg->MyQEntry->StatusMessage,
 742                     &ChrPtr(SendMsg->IO.RecvBuf.Buf)[4],
 743                     StrLength(SendMsg->IO.RecvBuf.Buf) - 4);
 744         SendMsg->MyQEntry->Status = 2;
 745         return eSendReply;
 746 }
 747
 748 eNextState SMTPC_send_QUIT(SmtpOutMsg *SendMsg)
 749 {
 750         StrBufPlain(SendMsg->IO.SendBuf.Buf,
 751                     HKEY("QUIT\r\n"));
 752
 753         SMTP_DBG_SEND();
 754         return eReadMessage;
 755 }
 756
 757 eNextState SMTPC_read_QUIT_reply(SmtpOutMsg *SendMsg)
 758 {
 759         SMTP_DBG_READ();
 760
 761         CtdlLogPrintf(CTDL_INFO, "SMTP client[%ld]: delivery to <%s> @ <%s> (%s) succeeded\n",
 762                       SendMsg->n, SendMsg->user, SendMsg->node, SendMsg->name);
 763         return eTerminateConnection;
 764 }
 765
 766 eNextState SMTPC_read_dummy(SmtpOutMsg *SendMsg)
 767 {
 768         return eSendReply;
 769 }
 770
 771 eNextState SMTPC_send_dummy(SmtpOutMsg *SendMsg)
 772 {
 773         return eReadMessage;
 774 }
 775
 776
 777 /*****************************************************************************/
 778 /*                     SMTP CLIENT DISPATCHER                                */
 779 /*****************************************************************************/
 780 SMTPReadHandler ReadHandlers[eMaxSMTPC] = {
 781         SMTPC_read_greeting,
 782         SMTPC_read_EHLO_reply,
 783         SMTPC_read_HELO_reply,
 784         SMTPC_read_auth_reply,
 785         SMTPC_read_FROM_reply,
 786         SMTPC_read_RCPT_reply,
 787         SMTPC_read_DATAcmd_reply,
 788         SMTPC_read_dummy,
 789         SMTPC_read_data_body_reply,
 790         SMTPC_read_QUIT_reply
 791 };
 792 SMTPSendHandler SendHandlers[eMaxSMTPC] = {
 793         SMTPC_send_dummy, /* we don't send a greeting, the server does... */
 794         SMTPC_send_EHLO,
 795         STMPC_send_HELO,
 796         SMTPC_send_auth,
 797         SMTPC_send_FROM,
 798         SMTPC_send_RCPT,
 799         SMTPC_send_DATAcmd,
 800         SMTPC_send_data_body,
 801         SMTPC_send_terminate_data_body,
 802         SMTPC_send_QUIT
 803 };
 804
 805 void SMTPSetTimeout(eNextState NextTCPState, SmtpOutMsg *pMsg)
 806 {
 807         CtdlLogPrintf(CTDL_DEBUG, "SMTP: %s\n", __FUNCTION__);
 808         long Timeout;
 809         switch (NextTCPState) {
 810         case eSendReply:
 811         case eSendMore:
 812                 Timeout = SMTP_C_SendTimeouts[pMsg->State];
 813                 break;
 814         case eReadMessage:
 815                 Timeout = SMTP_C_ReadTimeouts[pMsg->State];
 816                 break;
 817         case eTerminateConnection:
 818         case eAbort:
 819                 return;
 820         }
 821         SetNextTimeout(&pMsg->IO, Timeout);
 822 }
 823 eNextState SMTP_C_DispatchReadDone(AsyncIO *IO)
 824 {
 825         CtdlLogPrintf(CTDL_DEBUG, "SMTP: %s\n", __FUNCTION__);
 826         SmtpOutMsg *pMsg = IO->Data;
 827         eNextState rc;
 828
 829         rc = ReadHandlers[pMsg->State](pMsg);
 830         pMsg->State++;
 831         SMTPSetTimeout(rc, pMsg);
 832         return rc;
 833 }
 834 eNextState SMTP_C_DispatchWriteDone(AsyncIO *IO)
 835 {
 836         CtdlLogPrintf(CTDL_DEBUG, "SMTP: %s\n", __FUNCTION__);
 837         SmtpOutMsg *pMsg = IO->Data;
 838         eNextState rc;
 839
 840         rc = SendHandlers[pMsg->State](pMsg);
 841         SMTPSetTimeout(rc, pMsg);
 842         return rc;
 843 }
 844
 845
 846 /*****************************************************************************/
 847 /*                     SMTP CLIENT ERROR CATCHERS                            */
 848 /*****************************************************************************/
 849 eNextState SMTP_C_Terminate(AsyncIO *IO)
 850 {
 851         CtdlLogPrintf(CTDL_DEBUG, "SMTP: %s\n", __FUNCTION__);
 852         SmtpOutMsg *pMsg = IO->Data;
 853         FinalizeMessageSend(pMsg);
 854         return 0;
 855 }
 856 eNextState SMTP_C_Timeout(AsyncIO *IO)
 857 {
 858         CtdlLogPrintf(CTDL_DEBUG, "SMTP: %s\n", __FUNCTION__);
 859         SmtpOutMsg *pMsg = IO->Data;
 860         StrBufPlain(IO->ErrMsg, CKEY(ReadErrors[pMsg->State]));
 861         FinalizeMessageSend(pMsg);
 862         return 0;
 863 }
 864 eNextState SMTP_C_ConnFail(AsyncIO *IO)
 865 {
 866         CtdlLogPrintf(CTDL_DEBUG, "SMTP: %s\n", __FUNCTION__);
 867         SmtpOutMsg *pMsg = IO->Data;
 868         FinalizeMessageSend(pMsg);
 869         return 0;
 870 }
 871
 872
 873 /**
 874  * @brief lineread Handler; understands when to read more SMTP lines, and when this is a one-lined reply.
 875  */
 876 eReadState SMTP_C_ReadServerStatus(AsyncIO *IO)
 877 {
 878         eReadState Finished = eBufferNotEmpty;
 879
 880         while (Finished == eBufferNotEmpty) {
 881                 Finished = StrBufChunkSipLine(IO->IOBuf, &IO->RecvBuf);
 882
 883                 switch (Finished) {
 884                 case eMustReadMore: /// read new from socket...
 885                         return Finished;
 886                         break;
 887                 case eBufferNotEmpty: /* shouldn't happen... */
 888                 case eReadSuccess: /// done for now...
 889                         if (StrLength(IO->IOBuf) < 4)
 890                                 continue;
 891                         if (ChrPtr(IO->IOBuf)[3] == '-')
 892                                 Finished = eBufferNotEmpty;
 893                         else
 894                                 return Finished;
 895                         break;
 896                 case eReadFail: /// WHUT?
 897                         ///todo: shut down!
 898                         break;
 899                 }
 900         }
 901         return Finished;
 902 }
 903
 904
 905 #endif
 906 CTDL_MODULE_INIT(smtp_eventclient)
 907 {
 908         return "smtpeventclient";
 909 }