+++ /dev/null
-/*
- * This module is an SMTP and ESMTP implementation for the Citadel system.
- * It is compliant with all of the following:
- *
- * RFC 821 - Simple Mail Transfer Protocol
- * RFC 876 - Survey of SMTP Implementations
- * RFC 1047 - Duplicate messages and SMTP
- * RFC 1652 - 8 bit MIME
- * RFC 1869 - Extended Simple Mail Transfer Protocol
- * RFC 1870 - SMTP Service Extension for Message Size Declaration
- * RFC 2033 - Local Mail Transfer Protocol
- * RFC 2197 - SMTP Service Extension for Command Pipelining
- * RFC 2476 - Message Submission
- * RFC 2487 - SMTP Service Extension for Secure SMTP over TLS
- * RFC 2554 - SMTP Service Extension for Authentication
- * RFC 2821 - Simple Mail Transfer Protocol
- * RFC 2822 - Internet Message Format
- * RFC 2920 - SMTP Service Extension for Command Pipelining
- *
- * The VRFY and EXPN commands have been removed from this implementation
- * because nobody uses these commands anymore, except for spammers.
- *
- * Copyright (c) 1998-2009 by the citadel.org team
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#include "sysdep.h"
-#include <stdlib.h>
-#include <unistd.h>
-#include <stdio.h>
-#include <termios.h>
-#include <fcntl.h>
-#include <signal.h>
-#include <pwd.h>
-#include <errno.h>
-#include <sys/types.h>
-#include <syslog.h>
-
-#if TIME_WITH_SYS_TIME
-# include <sys/time.h>
-# include <time.h>
-#else
-# if HAVE_SYS_TIME_H
-# include <sys/time.h>
-# else
-# include <time.h>
-# endif
-#endif
-#include <sys/wait.h>
-#include <ctype.h>
-#include <string.h>
-#include <limits.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <libcitadel.h>
-#include "citadel.h"
-#include "server.h"
-#include "citserver.h"
-#include "support.h"
-#include "config.h"
-#include "control.h"
-#include "user_ops.h"
-#include "database.h"
-#include "msgbase.h"
-#include "internet_addressing.h"
-#include "genstamp.h"
-#include "domain.h"
-#include "clientsocket.h"
-#include "locate_host.h"
-#include "citadel_dirs.h"
-
-#include "ctdl_module.h"
-
-#include "smtp_util.h"
-#include "event_client.h"
-
-#ifdef EXPERIMENTAL_SMTP_EVENT_CLIENT
-
-int run_queue_now = 0; /* Set to 1 to ignore SMTP send retry times */
-int MsgCount = 0;
-/*****************************************************************************/
-/* SMTP CLIENT (OUTBOUND PROCESSING) STUFF */
-/*****************************************************************************/
-
-
-typedef enum _eSMTP_C_States {
- eConnect,
- eEHLO,
- eHELO,
- eSMTPAuth,
- eFROM,
- eRCPT,
- eDATA,
- eDATABody,
- eDATATerminateBody,
- eQUIT,
- eMaxSMTPC
-} eSMTP_C_States;
-
-const long SMTP_C_ReadTimeouts[eMaxSMTPC] = {
- 90, /* Greeting... */
- 30, /* EHLO */
- 30, /* HELO */
- 30, /* Auth */
- 30, /* From */
- 30, /* RCPT */
- 30, /* DATA */
- 90, /* DATABody */
- 900, /* end of body... */
- 30 /* QUIT */
-};
-/*
-const long SMTP_C_SendTimeouts[eMaxSMTPC] = {
-
-}; */
-const char *ReadErrors[eMaxSMTPC] = {
- "Connection broken during SMTP conversation",
- "Connection broken during SMTP EHLO",
- "Connection broken during SMTP HELO",
- "Connection broken during SMTP AUTH",
- "Connection broken during SMTP MAIL FROM",
- "Connection broken during SMTP RCPT",
- "Connection broken during SMTP DATA",
- "Connection broken during SMTP message transmit",
- ""/* quit reply, don't care. */
-};
-
-
-typedef struct _stmp_out_msg {
- long n;
- AsyncIO IO;
-
- eSMTP_C_States State;
-
- int SMTPstatus;
-
- int i_mx;
- int n_mx;
- int num_mxhosts;
- char mx_user[1024];
- char mx_pass[1024];
- char mx_host[1024];
- char mx_port[1024];
- char mxhosts[SIZ];
-
- StrBuf *msgtext;
- char *envelope_from;
- char user[1024];
- char node[1024];
- char name[1024];
- char addr[SIZ];
- char dsn[1024];
- char envelope_from_buf[1024];
- char mailfrom[1024];
-} SmtpOutMsg;
-
-eNextState SMTP_C_DispatchReadDone(void *Data);
-eNextState SMTP_C_DispatchWriteDone(void *Data);
-
-
-typedef eNextState (*SMTPReadHandler)(SmtpOutMsg *Msg);
-typedef eNextState (*SMTPSendHandler)(SmtpOutMsg *Msg);
-
-
-eReadState SMTP_C_ReadServerStatus(AsyncIO *IO)
-{
- eReadState Finished = eBufferNotEmpty;
-
- while (Finished == eBufferNotEmpty) {
- Finished = StrBufChunkSipLine(IO->IOBuf, &IO->RecvBuf);
-
- switch (Finished) {
- case eMustReadMore: /// read new from socket...
- return Finished;
- break;
- case eBufferNotEmpty: /* shouldn't happen... */
- case eReadSuccess: /// done for now...
- if (StrLength(IO->IOBuf) < 4)
- continue;
- if (ChrPtr(IO->IOBuf)[3] == '-')
- Finished = eBufferNotEmpty;
- else
- return Finished;
- break;
- case eReadFail: /// WHUT?
- ///todo: shut down!
- break;
- }
- }
- return Finished;
-}
-
-
-
-
-/**
- * this one has to have the context for loading the message via the redirect buffer...
- */
-SmtpOutMsg *smtp_load_msg(long msgnum, const char *addr, char *envelope_from)
-{
- CitContext *CCC=CC;
- SmtpOutMsg *SendMsg;
-
- SendMsg = (SmtpOutMsg *) malloc(sizeof(SmtpOutMsg));
-
- memset(SendMsg, 0, sizeof(SmtpOutMsg));
- SendMsg->IO.sock = (-1);
-
- SendMsg->n = MsgCount++;
- /* Load the message out of the database */
- CCC->redirect_buffer = NewStrBufPlain(NULL, SIZ);
- CtdlOutputMsg(msgnum, MT_RFC822, HEADERS_ALL, 0, 1, NULL, (ESC_DOT|SUPPRESS_ENV_TO) );
- SendMsg->msgtext = CCC->redirect_buffer;
- CCC->redirect_buffer = NULL;
- if ((StrLength(SendMsg->msgtext) > 0) &&
- ChrPtr(SendMsg->msgtext)[StrLength(SendMsg->msgtext) - 1] != '\n') {
- CtdlLogPrintf(CTDL_WARNING,
- "SMTP client[%ld]: Possible problem: message did not "
- "correctly terminate. (expecting 0x10, got 0x%02x)\n",
- SendMsg->n,
- ChrPtr(SendMsg->msgtext)[StrLength(SendMsg->msgtext) - 1] );
- StrBufAppendBufPlain(SendMsg->msgtext, HKEY("\r\n"), 0);
- }
-
- safestrncpy(SendMsg->addr, addr, SIZ);
- safestrncpy(SendMsg->envelope_from_buf, envelope_from, 1024);
-
- return SendMsg;
-}
-
-
-int smtp_resolve_recipients(SmtpOutMsg *SendMsg)
-{
- const char *ptr;
- char buf[1024];
- int scan_done;
- int lp, rp;
- int i;
-
- /* Parse out the host portion of the recipient address */
- process_rfc822_addr(SendMsg->addr, SendMsg->user, SendMsg->node, SendMsg->name);
-
- CtdlLogPrintf(CTDL_DEBUG, "SMTP client[%ld]: Attempting delivery to <%s> @ <%s> (%s)\n",
- SendMsg->n, SendMsg->user, SendMsg->node, SendMsg->name);
- /* If no envelope_from is supplied, extract one from the message */
- if ( (SendMsg->envelope_from == NULL) ||
- (IsEmptyStr(SendMsg->envelope_from)) ) {
- SendMsg->mailfrom[0] = '\0';
- scan_done = 0;
- ptr = ChrPtr(SendMsg->msgtext);
- do {
- if (ptr = cmemreadline(ptr, buf, sizeof buf), *ptr == 0) {
- scan_done = 1;
- }
- if (!strncasecmp(buf, "From:", 5)) {
- safestrncpy(SendMsg->mailfrom, &buf[5], sizeof SendMsg->mailfrom);
- striplt(SendMsg->mailfrom);
- for (i=0; SendMsg->mailfrom[i]; ++i) {
- if (!isprint(SendMsg->mailfrom[i])) {
- strcpy(&SendMsg->mailfrom[i], &SendMsg->mailfrom[i+1]);
- i=0;
- }
- }
-
- /* Strip out parenthesized names */
- lp = (-1);
- rp = (-1);
- for (i=0; !IsEmptyStr(SendMsg->mailfrom + i); ++i) {
- if (SendMsg->mailfrom[i] == '(') lp = i;
- if (SendMsg->mailfrom[i] == ')') rp = i;
- }
- if ((lp>0)&&(rp>lp)) {
- strcpy(&SendMsg->mailfrom[lp-1], &SendMsg->mailfrom[rp+1]);
- }
-
- /* Prefer brokketized names */
- lp = (-1);
- rp = (-1);
- for (i=0; !IsEmptyStr(SendMsg->mailfrom + i); ++i) {
- if (SendMsg->mailfrom[i] == '<') lp = i;
- if (SendMsg->mailfrom[i] == '>') rp = i;
- }
- if ( (lp>=0) && (rp>lp) ) {
- SendMsg->mailfrom[rp] = 0;
- memmove(SendMsg->mailfrom,
- &SendMsg->mailfrom[lp + 1],
- rp - lp);
- }
-
- scan_done = 1;
- }
- } while (scan_done == 0);
- if (IsEmptyStr(SendMsg->mailfrom)) strcpy(SendMsg->mailfrom, "someone@somewhere.org");
- stripallbut(SendMsg->mailfrom, '<', '>');
- SendMsg->envelope_from = SendMsg->mailfrom;
- }
-
- return 0;
-}
-
-void resolve_mx_hosts(SmtpOutMsg *SendMsg)
-{
- /// well this is blocking and sux, but libevent jsut supports async dns since v2
- /* Figure out what mail exchanger host we have to connect to */
- SendMsg->num_mxhosts = getmx(SendMsg->mxhosts, SendMsg->node);
- CtdlLogPrintf(CTDL_DEBUG, "SMTP client[%ld]: Number of MX hosts for <%s> is %d [%s]\n",
- SendMsg->n, SendMsg->node, SendMsg->num_mxhosts, SendMsg->mxhosts);
- if (SendMsg->num_mxhosts < 1) {
- SendMsg->SMTPstatus = 5;
- snprintf(SendMsg->dsn, SIZ, "No MX hosts found for <%s>", SendMsg->node);
- return; ///////TODO: abort!
- }
-
-}
-/* TODO: abort... */
-#define SMTP_ERROR(WHICH_ERR, ERRSTR) {SendMsg->SMTPstatus = WHICH_ERR; memcpy(SendMsg->dsn, HKEY(ERRSTR) + 1); return eAbort; }
-#define SMTP_VERROR(WHICH_ERR) { SendMsg->SMTPstatus = WHICH_ERR; safestrncpy(SendMsg->dsn, &ChrPtr(SendMsg->IO.IOBuf)[4], sizeof(SendMsg->dsn)); return eAbort; }
-#define SMTP_IS_STATE(WHICH_STATE) (ChrPtr(SendMsg->IO.IOBuf)[0] == WHICH_STATE)
-
-#define SMTP_DBG_SEND() CtdlLogPrintf(CTDL_DEBUG, "SMTP client[%ld]: > %s\n", SendMsg->n, ChrPtr(SendMsg->IO.IOBuf))
-#define SMTP_DBG_READ() CtdlLogPrintf(CTDL_DEBUG, "SMTP client[%ld]: < %s\n", SendMsg->n, ChrPtr(SendMsg->IO.IOBuf))
-
-void connect_one_smtpsrv(SmtpOutMsg *SendMsg)
-{
- char *endpart;
- char buf[SIZ];
-
- extract_token(buf, SendMsg->mxhosts, SendMsg->n_mx, '|', sizeof(buf));
- strcpy(SendMsg->mx_user, "");
- strcpy(SendMsg->mx_pass, "");
- if (num_tokens(buf, '@') > 1) {
- strcpy (SendMsg->mx_user, buf);
- endpart = strrchr(SendMsg->mx_user, '@');
- *endpart = '\0';
- strcpy (SendMsg->mx_host, endpart + 1);
- endpart = strrchr(SendMsg->mx_user, ':');
- if (endpart != NULL) {
- strcpy(SendMsg->mx_pass, endpart+1);
- *endpart = '\0';
- }
- }
- else
- strcpy (SendMsg->mx_host, buf);
- endpart = strrchr(SendMsg->mx_host, ':');
- if (endpart != 0){
- *endpart = '\0';
- strcpy(SendMsg->mx_port, endpart + 1);
- }
- else {
- strcpy(SendMsg->mx_port, "25");
- }
- CtdlLogPrintf(CTDL_DEBUG, "SMTP client[%ld]: connecting to %s : %s ...\n",
- SendMsg->n, SendMsg->mx_host, SendMsg->mx_port);
-
-}
-
-
-int connect_one_smtpsrv_xamine_result(void *Ctx)
-{
- SmtpOutMsg *SendMsg = Ctx;
- SendMsg->IO.SendBuf.fd =
- SendMsg->IO.RecvBuf.fd =
- SendMsg->IO.sock = sock_connect(SendMsg->mx_host, SendMsg->mx_port);
-
- snprintf(SendMsg->dsn, SIZ, "Could not connect: %s", strerror(errno));
- if (SendMsg->IO.sock >= 0)
- {
- CtdlLogPrintf(CTDL_DEBUG, "SMTP client[%ld]: connected!\n", SendMsg->n);
- int fdflags;
- fdflags = fcntl(SendMsg->IO.sock, F_GETFL);
- if (fdflags < 0)
- CtdlLogPrintf(CTDL_DEBUG,
- "SMTP client[%ld]: unable to get socket flags! %s \n",
- SendMsg->n, strerror(errno));
- fdflags = fdflags | O_NONBLOCK;
- if (fcntl(SendMsg->IO.sock, F_SETFL, fdflags) < 0)
- CtdlLogPrintf(CTDL_DEBUG,
- "SMTP client[%ld]: unable to set socket nonblocking flags! %s \n",
- SendMsg->n, strerror(errno));
- }
- if (SendMsg->IO.sock < 0) {
- if (errno > 0) {
- snprintf(SendMsg->dsn, SIZ, "%s", strerror(errno));
- }
- else {
- snprintf(SendMsg->dsn, SIZ, "Unable to connect to %s : %s\n",
- SendMsg->mx_host, SendMsg->mx_port);
- }
- }
- /// hier: naechsten mx ausprobieren.
- if (SendMsg->IO.sock < 0) {
- SendMsg->SMTPstatus = 4; /* dsn is already filled in */
- //// hier: abbrechen & bounce.
- return -1;
- }
- SendMsg->IO.SendBuf.Buf = NewStrBuf();
- SendMsg->IO.RecvBuf.Buf = NewStrBuf();
- SendMsg->IO.IOBuf = NewStrBuf();
- InitEventIO(&SendMsg->IO, SendMsg,
- SMTP_C_DispatchReadDone,
- SMTP_C_DispatchWriteDone,
- SMTP_C_ReadServerStatus,
- 1);
- return 0;
-}
-
-eNextState SMTPC_read_greeting(SmtpOutMsg *SendMsg)
-{
- /* Process the SMTP greeting from the server */
- SMTP_DBG_READ();
-
- if (!SMTP_IS_STATE('2')) {
- if (SMTP_IS_STATE('4'))
- SMTP_VERROR(4)
- else
- SMTP_VERROR(5)
- }
- return eSendReply;
-}
-
-eNextState SMTPC_send_EHLO(SmtpOutMsg *SendMsg)
-{
- /* At this point we know we are talking to a real SMTP server */
-
- /* Do a EHLO command. If it fails, try the HELO command. */
- StrBufPrintf(SendMsg->IO.SendBuf.Buf,
- "EHLO %s\r\n", config.c_fqdn);
-
- SMTP_DBG_SEND();
- return eReadMessage;
-}
-
-eNextState SMTPC_read_EHLO_reply(SmtpOutMsg *SendMsg)
-{
- SMTP_DBG_READ();
-
- if (SMTP_IS_STATE('2')) {
- SendMsg->State ++;
- if (IsEmptyStr(SendMsg->mx_user))
- SendMsg->State ++; /* Skip auth... */
- }
- /* else we fall back to 'helo' */
- return eSendReply;
-}
-
-eNextState STMPC_send_HELO(SmtpOutMsg *SendMsg)
-{
- StrBufPrintf(SendMsg->IO.SendBuf.Buf,
- "HELO %s\r\n", config.c_fqdn);
-
- SMTP_DBG_SEND();
- return eReadMessage;
-}
-
-eNextState SMTPC_read_HELO_reply(SmtpOutMsg *SendMsg)
-{
- SMTP_DBG_READ();
-
- if (!SMTP_IS_STATE('2')) {
- if (SMTP_IS_STATE('4'))
- SMTP_VERROR(4)
- else
- SMTP_VERROR(5)
- }
- if (!IsEmptyStr(SendMsg->mx_user))
- SendMsg->State ++; /* Skip auth... */
- return eSendReply;
-}
-
-eNextState SMTPC_send_auth(SmtpOutMsg *SendMsg)
-{
- char buf[SIZ];
- char encoded[1024];
-
- /* Do an AUTH command if necessary */
- sprintf(buf, "%s%c%s%c%s",
- SendMsg->mx_user, '\0',
- SendMsg->mx_user, '\0',
- SendMsg->mx_pass);
- CtdlEncodeBase64(encoded, buf,
- strlen(SendMsg->mx_user) +
- strlen(SendMsg->mx_user) +
- strlen(SendMsg->mx_pass) + 2, 0);
- StrBufPrintf(SendMsg->IO.SendBuf.Buf,
- "AUTH PLAIN %s\r\n", encoded);
-
- SMTP_DBG_SEND();
- return eReadMessage;
-}
-
-eNextState SMTPC_read_auth_reply(SmtpOutMsg *SendMsg)
-{
- /* Do an AUTH command if necessary */
-
- SMTP_DBG_READ();
-
- if (!SMTP_IS_STATE('2')) {
- if (SMTP_IS_STATE('4'))
- SMTP_VERROR(4)
- else
- SMTP_VERROR(5)
- }
- return eSendReply;
-}
-
-eNextState SMTPC_send_FROM(SmtpOutMsg *SendMsg)
-{
- /* previous command succeeded, now try the MAIL FROM: command */
- StrBufPrintf(SendMsg->IO.SendBuf.Buf,
- "MAIL FROM:<%s>\r\n",
- SendMsg->envelope_from);
-
- SMTP_DBG_SEND();
- return eReadMessage;
-}
-
-eNextState SMTPC_read_FROM_reply(SmtpOutMsg *SendMsg)
-{
- SMTP_DBG_READ();
-
- if (!SMTP_IS_STATE('2')) {
- if (SMTP_IS_STATE('4'))
- SMTP_VERROR(4)
- else
- SMTP_VERROR(5)
- }
- return eSendReply;
-}
-
-
-eNextState SMTPC_send_RCPT(SmtpOutMsg *SendMsg)
-{
- /* MAIL succeeded, now try the RCPT To: command */
- StrBufPrintf(SendMsg->IO.SendBuf.Buf,
- "RCPT TO:<%s@%s>\r\n",
- SendMsg->user,
- SendMsg->node);
-
- SMTP_DBG_SEND();
- return eReadMessage;
-}
-
-eNextState SMTPC_read_RCPT_reply(SmtpOutMsg *SendMsg)
-{
- SMTP_DBG_READ();
-
- if (!SMTP_IS_STATE('2')) {
- if (SMTP_IS_STATE('4'))
- SMTP_VERROR(4)
- else
- SMTP_VERROR(5)
- }
- return eSendReply;
-}
-
-eNextState SMTPC_send_DATAcmd(SmtpOutMsg *SendMsg)
-{
- /* RCPT succeeded, now try the DATA command */
- StrBufPlain(SendMsg->IO.SendBuf.Buf,
- HKEY("DATA\r\n"));
-
- SMTP_DBG_SEND();
- return eReadMessage;
-}
-
-eNextState SMTPC_read_DATAcmd_reply(SmtpOutMsg *SendMsg)
-{
- SMTP_DBG_READ();
-
- if (!SMTP_IS_STATE('3')) {
- if (SMTP_IS_STATE('4'))
- SMTP_VERROR(3)
- else
- SMTP_VERROR(5)
- }
- return eSendReply;
-}
-
-eNextState SMTPC_send_data_body(SmtpOutMsg *SendMsg)
-{
- StrBuf *Buf;
- /* If we reach this point, the server is expecting data.*/
-
- Buf = SendMsg->IO.SendBuf.Buf;
- SendMsg->IO.SendBuf.Buf = SendMsg->msgtext;
- SendMsg->msgtext = Buf;
- //// TODO timeout like that: (SendMsg->msg_size / 128) + 50);
- SendMsg->State ++;
-
- return eSendMore;
-}
-
-eNextState SMTPC_send_terminate_data_body(SmtpOutMsg *SendMsg)
-{
- StrBuf *Buf;
-
- Buf = SendMsg->IO.SendBuf.Buf;
- SendMsg->IO.SendBuf.Buf = SendMsg->msgtext;
- SendMsg->msgtext = Buf;
-
- StrBufPlain(SendMsg->IO.SendBuf.Buf,
- HKEY(".\r\n"));
-
- return eReadMessage;
-
-}
-
-eNextState SMTPC_read_data_body_reply(SmtpOutMsg *SendMsg)
-{
- SMTP_DBG_READ();
-
- if (!SMTP_IS_STATE('2')) {
- if (SMTP_IS_STATE('4'))
- SMTP_VERROR(4)
- else
- SMTP_VERROR(5)
- }
-
- /* We did it! */
- safestrncpy(SendMsg->dsn, &ChrPtr(SendMsg->IO.RecvBuf.Buf)[4], 1023);
- SendMsg->SMTPstatus = 2;
- return eSendReply;
-}
-
-eNextState SMTPC_send_QUIT(SmtpOutMsg *SendMsg)
-{
- StrBufPlain(SendMsg->IO.SendBuf.Buf,
- HKEY("QUIT\r\n"));
-
- SMTP_DBG_SEND();
- return eReadMessage;
-}
-
-eNextState SMTPC_read_QUIT_reply(SmtpOutMsg *SendMsg)
-{
- SMTP_DBG_READ();
-
- CtdlLogPrintf(CTDL_INFO, "SMTP client[%ld]: delivery to <%s> @ <%s> (%s) succeeded\n",
- SendMsg->n, SendMsg->user, SendMsg->node, SendMsg->name);
- return eSendReply;
-}
-
-eNextState SMTPC_read_dummy(SmtpOutMsg *SendMsg)
-{
- return eSendReply;
-}
-
-eNextState SMTPC_send_dummy(SmtpOutMsg *SendMsg)
-{
- return eReadMessage;
-}
-
-/*
- * smtp_do_bounce() is caled by smtp_do_procmsg() to scan a set of delivery
- * instructions for "5" codes (permanent fatal errors) and produce/deliver
- * a "bounce" message (delivery status notification).
- */
-void smtp_do_bounce(char *instr) {
- int i;
- int lines;
- int status;
- char buf[1024];
- char key[1024];
- char addr[1024];
- char dsn[1024];
- char bounceto[1024];
- StrBuf *boundary;
- int num_bounces = 0;
- int bounce_this = 0;
- long bounce_msgid = (-1);
- time_t submitted = 0L;
- struct CtdlMessage *bmsg = NULL;
- int give_up = 0;
- struct recptypes *valid;
- int successful_bounce = 0;
- static int seq = 0;
- StrBuf *BounceMB;
- long omsgid = (-1);
-
- CtdlLogPrintf(CTDL_DEBUG, "smtp_do_bounce() called\n");
- strcpy(bounceto, "");
- boundary = NewStrBufPlain(HKEY("=_Citadel_Multipart_"));
- StrBufAppendPrintf(boundary, "%s_%04x%04x", config.c_fqdn, getpid(), ++seq);
- lines = num_tokens(instr, '\n');
-
- /* See if it's time to give up on delivery of this message */
- for (i=0; i<lines; ++i) {
- extract_token(buf, instr, i, '\n', sizeof buf);
- extract_token(key, buf, 0, '|', sizeof key);
- extract_token(addr, buf, 1, '|', sizeof addr);
- if (!strcasecmp(key, "submitted")) {
- submitted = atol(addr);
- }
- }
-
- if ( (time(NULL) - submitted) > SMTP_GIVE_UP ) {
- give_up = 1;
- }
-
- /* Start building our bounce message */
-
- bmsg = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
- if (bmsg == NULL) return;
- memset(bmsg, 0, sizeof(struct CtdlMessage));
- BounceMB = NewStrBufPlain(NULL, 1024);
-
- bmsg->cm_magic = CTDLMESSAGE_MAGIC;
- bmsg->cm_anon_type = MES_NORMAL;
- bmsg->cm_format_type = FMT_RFC822;
- bmsg->cm_fields['A'] = strdup("Citadel");
- bmsg->cm_fields['O'] = strdup(MAILROOM);
- bmsg->cm_fields['N'] = strdup(config.c_nodename);
- bmsg->cm_fields['U'] = strdup("Delivery Status Notification (Failure)");
- StrBufAppendBufPlain(BounceMB, HKEY("Content-type: multipart/mixed; boundary=\""), 0);
- StrBufAppendBuf(BounceMB, boundary, 0);
- StrBufAppendBufPlain(BounceMB, HKEY("\"\r\n"), 0);
- StrBufAppendBufPlain(BounceMB, HKEY("MIME-Version: 1.0\r\n"), 0);
- StrBufAppendBufPlain(BounceMB, HKEY("X-Mailer: " CITADEL "\r\n"), 0);
- StrBufAppendBufPlain(BounceMB, HKEY("\r\nThis is a multipart message in MIME format.\r\n\r\n"), 0);
- StrBufAppendBufPlain(BounceMB, HKEY("--"), 0);
- StrBufAppendBuf(BounceMB, boundary, 0);
- StrBufAppendBufPlain(BounceMB, HKEY("\r\n"), 0);
- StrBufAppendBufPlain(BounceMB, HKEY("Content-type: text/plain\r\n\r\n"), 0);
-
- if (give_up) StrBufAppendBufPlain(BounceMB, HKEY(
-"A message you sent could not be delivered to some or all of its recipients\n"
-"due to prolonged unavailability of its destination(s).\n"
-"Giving up on the following addresses:\n\n"
- ), 0);
-
- else StrBufAppendBufPlain(BounceMB, HKEY(
-"A message you sent could not be delivered to some or all of its recipients.\n"
-"The following addresses were undeliverable:\n\n"
- ), 0);
-
- /*
- * Now go through the instructions checking for stuff.
- */
- for (i=0; i<lines; ++i) {
- long addrlen;
- long dsnlen;
- extract_token(buf, instr, i, '\n', sizeof buf);
- extract_token(key, buf, 0, '|', sizeof key);
- addrlen = extract_token(addr, buf, 1, '|', sizeof addr);
- status = extract_int(buf, 2);
- dsnlen = extract_token(dsn, buf, 3, '|', sizeof dsn);
- bounce_this = 0;
-
- CtdlLogPrintf(CTDL_DEBUG, "key=<%s> addr=<%s> status=%d dsn=<%s>\n",
- key, addr, status, dsn);
-
- if (!strcasecmp(key, "bounceto")) {
- strcpy(bounceto, addr);
- }
-
- if (!strcasecmp(key, "msgid")) {
- omsgid = atol(addr);
- }
-
- if (!strcasecmp(key, "remote")) {
- if (status == 5) bounce_this = 1;
- if (give_up) bounce_this = 1;
- }
-
- if (bounce_this) {
- ++num_bounces;
-
- StrBufAppendBufPlain(BounceMB, addr, addrlen, 0);
- StrBufAppendBufPlain(BounceMB, HKEY(": "), 0);
- StrBufAppendBufPlain(BounceMB, dsn, dsnlen, 0);
- StrBufAppendBufPlain(BounceMB, HKEY("\r\n"), 0);
-
- remove_token(instr, i, '\n');
- --i;
- --lines;
- }
- }
-
- /* Attach the original message */
- if (omsgid >= 0) {
- StrBufAppendBufPlain(BounceMB, HKEY("--"), 0);
- StrBufAppendBuf(BounceMB, boundary, 0);
- StrBufAppendBufPlain(BounceMB, HKEY("\r\n"), 0);
- StrBufAppendBufPlain(BounceMB, HKEY("Content-type: message/rfc822\r\n"), 0);
- StrBufAppendBufPlain(BounceMB, HKEY("Content-Transfer-Encoding: 7bit\r\n"), 0);
- StrBufAppendBufPlain(BounceMB, HKEY("Content-Disposition: inline\r\n"), 0);
- StrBufAppendBufPlain(BounceMB, HKEY("\r\n"), 0);
-
- CC->redirect_buffer = NewStrBufPlain(NULL, SIZ);
- CtdlOutputMsg(omsgid, MT_RFC822, HEADERS_ALL, 0, 1, NULL, 0);
- StrBufAppendBuf(BounceMB, CC->redirect_buffer, 0);
- FreeStrBuf(&CC->redirect_buffer);
- }
-
- /* Close the multipart MIME scope */
- StrBufAppendBufPlain(BounceMB, HKEY("--"), 0);
- StrBufAppendBuf(BounceMB, boundary, 0);
- StrBufAppendBufPlain(BounceMB, HKEY("--\r\n"), 0);
- if (bmsg->cm_fields['A'] != NULL)
- free(bmsg->cm_fields['A']);
- bmsg->cm_fields['A'] = SmashStrBuf(&BounceMB);
- /* Deliver the bounce if there's anything worth mentioning */
- CtdlLogPrintf(CTDL_DEBUG, "num_bounces = %d\n", num_bounces);
- if (num_bounces > 0) {
-
- /* First try the user who sent the message */
- CtdlLogPrintf(CTDL_DEBUG, "bounce to user? <%s>\n", bounceto);
- if (IsEmptyStr(bounceto)) {
- CtdlLogPrintf(CTDL_ERR, "No bounce address specified\n");
- bounce_msgid = (-1L);
- }
-
- /* Can we deliver the bounce to the original sender? */
- valid = validate_recipients(bounceto, smtp_get_Recipients (), 0);
- if (valid != NULL) {
- if (valid->num_error == 0) {
- CtdlSubmitMsg(bmsg, valid, "", QP_EADDR);
- successful_bounce = 1;
- }
- }
-
- /* If not, post it in the Aide> room */
- if (successful_bounce == 0) {
- CtdlSubmitMsg(bmsg, NULL, config.c_aideroom, QP_EADDR);
- }
-
- /* Free up the memory we used */
- if (valid != NULL) {
- free_recipients(valid);
- }
- }
- FreeStrBuf(&boundary);
- CtdlFreeMessage(bmsg);
- CtdlLogPrintf(CTDL_DEBUG, "Done processing bounces\n");
-}
-
-
-/*
- * smtp_purge_completed_deliveries() is caled by smtp_do_procmsg() to scan a
- * set of delivery instructions for completed deliveries and remove them.
- *
- * It returns the number of incomplete deliveries remaining.
- */
-int smtp_purge_completed_deliveries(char *instr) {
- int i;
- int lines;
- int status;
- char buf[1024];
- char key[1024];
- char addr[1024];
- char dsn[1024];
- int completed;
- int incomplete = 0;
-
- lines = num_tokens(instr, '\n');
- for (i=0; i<lines; ++i) {
- extract_token(buf, instr, i, '\n', sizeof buf);
- extract_token(key, buf, 0, '|', sizeof key);
- extract_token(addr, buf, 1, '|', sizeof addr);
- status = extract_int(buf, 2);
- extract_token(dsn, buf, 3, '|', sizeof dsn);
-
- completed = 0;
-
- if (!strcasecmp(key, "remote")) {
- if (status == 2) completed = 1;
- else ++incomplete;
- }
-
- if (completed) {
- remove_token(instr, i, '\n');
- --i;
- --lines;
- }
- }
-
- return(incomplete);
-}
-
-void smtp_try(const char *key, const char *addr, int *status,
- char *dsn, size_t n, long msgnum, char *envelope_from)
-{
- SmtpOutMsg * SmtpC = smtp_load_msg(msgnum, addr, envelope_from);
- smtp_resolve_recipients(SmtpC);
- resolve_mx_hosts(SmtpC);
- connect_one_smtpsrv(SmtpC);
- QueueEventContext(SmtpC, connect_one_smtpsrv_xamine_result);
-}
-
-/*
- * smtp_do_procmsg()
- *
- * Called by smtp_do_queue() to handle an individual message.
- */
-void smtp_do_procmsg(long msgnum, void *userdata) {
- struct CtdlMessage *msg = NULL;
- char *instr = NULL;
- char *results = NULL;
- int i;
- int lines;
- int status;
- char buf[1024];
- char key[1024];
- char addr[1024];
- char dsn[1024];
- char envelope_from[1024];
- long text_msgid = (-1);
- int incomplete_deliveries_remaining;
- time_t attempted = 0L;
- time_t last_attempted = 0L;
- time_t retry = SMTP_RETRY_INTERVAL;
-
- CtdlLogPrintf(CTDL_DEBUG, "SMTP client: smtp_do_procmsg(%ld)\n", msgnum);
- strcpy(envelope_from, "");
-
- msg = CtdlFetchMessage(msgnum, 1);
- if (msg == NULL) {
- CtdlLogPrintf(CTDL_ERR, "SMTP client: tried %ld but no such message!\n", msgnum);
- return;
- }
-
- instr = strdup(msg->cm_fields['M']);
- CtdlFreeMessage(msg);
-
- /* Strip out the headers amd any other non-instruction line */
- lines = num_tokens(instr, '\n');
- for (i=0; i<lines; ++i) {
- extract_token(buf, instr, i, '\n', sizeof buf);
- if (num_tokens(buf, '|') < 2) {
- remove_token(instr, i, '\n');
- --lines;
- --i;
- }
- }
-
- /* Learn the message ID and find out about recent delivery attempts */
- lines = num_tokens(instr, '\n');
- for (i=0; i<lines; ++i) {
- extract_token(buf, instr, i, '\n', sizeof buf);
- extract_token(key, buf, 0, '|', sizeof key);
- if (!strcasecmp(key, "msgid")) {
- text_msgid = extract_long(buf, 1);
- }
- if (!strcasecmp(key, "envelope_from")) {
- extract_token(envelope_from, buf, 1, '|', sizeof envelope_from);
- }
- if (!strcasecmp(key, "retry")) {
- /* double the retry interval after each attempt */
- retry = extract_long(buf, 1) * 2L;
- if (retry > SMTP_RETRY_MAX) {
- retry = SMTP_RETRY_MAX;
- }
- remove_token(instr, i, '\n');
- }
- if (!strcasecmp(key, "attempted")) {
- attempted = extract_long(buf, 1);
- if (attempted > last_attempted)
- last_attempted = attempted;
- }
- }
-
- /*
- * Postpone delivery if we've already tried recently.
- * /
- if (((time(NULL) - last_attempted) < retry) && (run_queue_now == 0)) {
- CtdlLogPrintf(CTDL_DEBUG, "SMTP client: Retry time not yet reached.\n");
- free(instr);
- return;
- }
-TMP TODO */
-
- /*
- * Bail out if there's no actual message associated with this
- */
- if (text_msgid < 0L) {
- CtdlLogPrintf(CTDL_ERR, "SMTP client: no 'msgid' directive found!\n");
- free(instr);
- return;
- }
-
- /* Plow through the instructions looking for 'remote' directives and
- * a status of 0 (no delivery yet attempted) or 3/4 (transient errors
- * were experienced and it's time to try again)
- */
- lines = num_tokens(instr, '\n');
- for (i=0; i<lines; ++i) {
- extract_token(buf, instr, i, '\n', sizeof buf);
- extract_token(key, buf, 0, '|', sizeof key);
- extract_token(addr, buf, 1, '|', sizeof addr);
- status = extract_int(buf, 2);
- extract_token(dsn, buf, 3, '|', sizeof dsn);
- if ( (!strcasecmp(key, "remote"))
- && ((status==0)||(status==3)||(status==4)) ) {
-
- /* Remove this "remote" instruction from the set,
- * but replace the set's final newline if
- * remove_token() stripped it. It has to be there.
- */
- remove_token(instr, i, '\n');
- if (instr[strlen(instr)-1] != '\n') {
- strcat(instr, "\n");
- }
-
- --i;
- --lines;
- CtdlLogPrintf(CTDL_DEBUG, "SMTP client: Trying <%s>\n", addr);
- smtp_try(key, addr, &status, dsn, sizeof dsn, text_msgid, envelope_from);
- if (status != 2) {
- if (results == NULL) {
- results = malloc(1024);
- memset(results, 0, 1024);
- }
- else {
- results = realloc(results, strlen(results) + 1024);
- }
- snprintf(&results[strlen(results)], 1024,
- "%s|%s|%d|%s\n",
- key, addr, status, dsn);
- }
- }
- }
-
- if (results != NULL) {
- instr = realloc(instr, strlen(instr) + strlen(results) + 2);
- strcat(instr, results);
- free(results);
- }
-
-
- /* Generate 'bounce' messages */
- smtp_do_bounce(instr);
-
- /* Go through the delivery list, deleting completed deliveries */
- incomplete_deliveries_remaining =
- smtp_purge_completed_deliveries(instr);
-
-
- /*
- * No delivery instructions remain, so delete both the instructions
- * message and the message message.
- */
- if (incomplete_deliveries_remaining <= 0) {
- long delmsgs[2];
- delmsgs[0] = msgnum;
- delmsgs[1] = text_msgid;
- CtdlDeleteMessages(SMTP_SPOOLOUT_ROOM, delmsgs, 2, "");
- }
-
- /*
- * Uncompleted delivery instructions remain, so delete the old
- * instructions and replace with the updated ones.
- */
- if (incomplete_deliveries_remaining > 0) {
- CtdlDeleteMessages(SMTP_SPOOLOUT_ROOM, &msgnum, 1, "");
- msg = malloc(sizeof(struct CtdlMessage));
- memset(msg, 0, sizeof(struct CtdlMessage));
- msg->cm_magic = CTDLMESSAGE_MAGIC;
- msg->cm_anon_type = MES_NORMAL;
- msg->cm_format_type = FMT_RFC822;
- msg->cm_fields['M'] = malloc(strlen(instr)+SIZ);
- snprintf(msg->cm_fields['M'],
- strlen(instr)+SIZ,
- "Content-type: %s\n\n%s\n"
- "attempted|%ld\n"
- "retry|%ld\n",
- SPOOLMIME, instr, (long)time(NULL), (long)retry );
- CtdlSubmitMsg(msg, NULL, SMTP_SPOOLOUT_ROOM, QP_EADDR);
- CtdlFreeMessage(msg);
- }
-
- free(instr);
-}
-
-
-/*****************************************************************************/
-/* SMTP UTILITY COMMANDS */
-/*****************************************************************************/
-
-void cmd_smtp(char *argbuf) {
- char cmd[64];
- char node[256];
- char buf[1024];
- int i;
- int num_mxhosts;
-
- if (CtdlAccessCheck(ac_aide)) return;
-
- extract_token(cmd, argbuf, 0, '|', sizeof cmd);
-
- if (!strcasecmp(cmd, "mx")) {
- extract_token(node, argbuf, 1, '|', sizeof node);
- num_mxhosts = getmx(buf, node);
- cprintf("%d %d MX hosts listed for %s\n",
- LISTING_FOLLOWS, num_mxhosts, node);
- for (i=0; i<num_mxhosts; ++i) {
- extract_token(node, buf, i, '|', sizeof node);
- cprintf("%s\n", node);
- }
- cprintf("000\n");
- return;
- }
-
- else if (!strcasecmp(cmd, "runqueue")) {
- run_queue_now = 1;
- cprintf("%d All outbound SMTP will be retried now.\n", CIT_OK);
- return;
- }
-
- else {
- cprintf("%d Invalid command.\n", ERROR + ILLEGAL_VALUE);
- }
-
-}
-
-
-/*
- * smtp_queue_thread()
- *
- * Run through the queue sending out messages.
- */
-void *smtp_queue_thread(void *arg) {
- int num_processed = 0;
- struct CitContext smtp_queue_CC;
-
- CtdlFillSystemContext(&smtp_queue_CC, "SMTP Send");
- citthread_setspecific(MyConKey, (void *)&smtp_queue_CC);
- CtdlLogPrintf(CTDL_DEBUG, "smtp_queue_thread() initializing\n");
-
- while (!CtdlThreadCheckStop()) {
-
- CtdlLogPrintf(CTDL_INFO, "SMTP client: processing outbound queue\n");
-
- if (CtdlGetRoom(&CC->room, SMTP_SPOOLOUT_ROOM) != 0) {
- CtdlLogPrintf(CTDL_ERR, "Cannot find room <%s>\n", SMTP_SPOOLOUT_ROOM);
- }
- else {
- num_processed = CtdlForEachMessage(MSGS_ALL, 0L, NULL, SPOOLMIME, NULL, smtp_do_procmsg, NULL);
- }
- CtdlLogPrintf(CTDL_INFO, "SMTP client: queue run completed; %d messages processed\n", num_processed);
- CtdlThreadSleep(60);
- }
-
- CtdlClearSystemContext();
- return(NULL);
-}
-
-
-/*
- * Initialize the SMTP outbound queue
- */
-void smtp_init_spoolout(void) {
- struct ctdlroom qrbuf;
-
- /*
- * Create the room. This will silently fail if the room already
- * exists, and that's perfectly ok, because we want it to exist.
- */
- CtdlCreateRoom(SMTP_SPOOLOUT_ROOM, 3, "", 0, 1, 0, VIEW_MAILBOX);
-
- /*
- * Make sure it's set to be a "system room" so it doesn't show up
- * in the <K>nown rooms list for Aides.
- */
- if (CtdlGetRoomLock(&qrbuf, SMTP_SPOOLOUT_ROOM) == 0) {
- qrbuf.QRflags2 |= QR2_SYSTEM;
- CtdlPutRoomLock(&qrbuf);
- }
-}
-
-
-SMTPReadHandler ReadHandlers[eMaxSMTPC] = {
- SMTPC_read_greeting,
- SMTPC_read_EHLO_reply,
- SMTPC_read_HELO_reply,
- SMTPC_read_auth_reply,
- SMTPC_read_FROM_reply,
- SMTPC_read_RCPT_reply,
- SMTPC_read_DATAcmd_reply,
- SMTPC_read_dummy,
- SMTPC_read_data_body_reply,
- SMTPC_read_QUIT_reply
-};
-
-SMTPSendHandler SendHandlers[eMaxSMTPC] = {
- SMTPC_send_dummy, /* we don't send a greeting, the server does... */
- SMTPC_send_EHLO,
- STMPC_send_HELO,
- SMTPC_send_auth,
- SMTPC_send_FROM,
- SMTPC_send_RCPT,
- SMTPC_send_DATAcmd,
- SMTPC_send_data_body,
- SMTPC_send_terminate_data_body,
- SMTPC_send_QUIT
-};
-
-eNextState SMTP_C_DispatchReadDone(void *Data)
-{
- SmtpOutMsg *pMsg = Data;
- eNextState rc = ReadHandlers[pMsg->State](pMsg);
- pMsg->State++;
- return rc;
-}
-
-eNextState SMTP_C_DispatchWriteDone(void *Data)
-{
- SmtpOutMsg *pMsg = Data;
- return SendHandlers[pMsg->State](pMsg);
-
-}
-
-
-#endif
-CTDL_MODULE_INIT(smtp_eventclient)
-{
-#ifdef EXPERIMENTAL_SMTP_EVENT_CLIENT
- if (!threading)
- {
- smtp_init_spoolout();
- CtdlThreadCreate("SMTPEvent Send", CTDLTHREAD_BIGSTACK, smtp_queue_thread, NULL);
-
- CtdlRegisterProtoHook(cmd_smtp, "SMTP", "SMTP utility commands");
- }
-#endif
-
- /* return our Subversion id for the Log */
- return "smtpeventclient";
-}
projects / citadel.git / commitdiff