+++ /dev/null
-/*
- * This module allows Citadel to use SpamAssassin to filter incoming messages
- * arriving via SMTP. For more information on SpamAssassin, visit
- * http://www.spamassassin.org (the SpamAssassin project is not in any way
- * affiliated with the Citadel project).
- *
- * Copyright (c) 1998-2015 by the citadel.org team
- *
- * This program is open source software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 3.
- *
- * 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.
- */
-
-#define SPAMASSASSIN_PORT "783"
-
-#include "sysdep.h"
-#include <stdlib.h>
-#include <unistd.h>
-#include <stdio.h>
-#include <fcntl.h>
-#include <signal.h>
-#include <pwd.h>
-#include <errno.h>
-#include <sys/types.h>
-#include <time.h>
-#include <sys/wait.h>
-#include <string.h>
-#include <limits.h>
-#include <sys/socket.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 "domain.h"
-#include "clientsocket.h"
-
-
-#include "ctdl_module.h"
-
-
-
-/*
- * Connect to the SpamAssassin server and scan a message.
- */
-int spam_assassin(struct CtdlMessage *msg, struct recptypes *recp) {
- int sock = (-1);
- char sahosts[SIZ];
- int num_sahosts;
- char buf[SIZ];
- int is_spam = 0;
- int sa;
- StrBuf *msgtext;
- CitContext *CCC=CC;
-
- /* For users who have authenticated to this server we never want to
- * apply spam filtering, because presumably they're trustworthy.
- */
- if (CC->logged_in) return(0);
-
- /* See if we have any SpamAssassin hosts configured */
- num_sahosts = get_hosts(sahosts, "spamassassin");
- if (num_sahosts < 1) return(0);
-
- /* Try them one by one until we get a working one */
- for (sa=0; sa<num_sahosts; ++sa) {
- extract_token(buf, sahosts, sa, '|', sizeof buf);
- syslog(LOG_INFO, "Connecting to SpamAssassin at <%s>\n", buf);
- sock = sock_connect(buf, SPAMASSASSIN_PORT);
- if (sock >= 0) syslog(LOG_DEBUG, "Connected!\n");
- }
-
- if (sock < 0) {
- /* If the service isn't running, just pass the mail
- * through. Potentially throwing away mails isn't good.
- */
- return(0);
- }
-
- CCC->SBuf.Buf = NewStrBuf();
- CCC->sMigrateBuf = NewStrBuf();
- CCC->SBuf.ReadWritePointer = NULL;
-
- /* Command */
- syslog(LOG_DEBUG, "Transmitting command\n");
- sprintf(buf, "CHECK SPAMC/1.2\r\n\r\n");
- sock_write(&sock, buf, strlen(buf));
-
- /* Message */
- CCC->redirect_buffer = NewStrBufPlain(NULL, SIZ);
- CtdlOutputPreLoadedMsg(msg, MT_RFC822, HEADERS_ALL, 0, 1, 0);
- msgtext = CC->redirect_buffer;
- CC->redirect_buffer = NULL;
-
- sock_write(&sock, SKEY(msgtext));
- FreeStrBuf(&msgtext);
-
- /* Close one end of the socket connection; this tells SpamAssassin
- * that we're done.
- */
- if (sock != -1)
- sock_shutdown(sock, SHUT_WR);
-
- /* Response */
- syslog(LOG_DEBUG, "Awaiting response\n");
- if (sock_getln(&sock, buf, sizeof buf) < 0) {
- goto bail;
- }
- syslog(LOG_DEBUG, "<%s\n", buf);
- if (strncasecmp(buf, "SPAMD", 5)) {
- goto bail;
- }
- if (sock_getln(&sock, buf, sizeof buf) < 0) {
- goto bail;
- }
- syslog(LOG_DEBUG, "<%s\n", buf);
- syslog(LOG_DEBUG, "c_spam_flag_only setting %d\n", CtdlGetConfigInt("c_spam_flag_only"));
- if (CtdlGetConfigInt("c_spam_flag_only")) {
- int headerlen;
- char *cur;
- char sastatus[10];
- char sascore[10];
- char saoutof[10];
- int numscore;
-
- syslog(LOG_DEBUG, "flag spam code used");
-
- extract_token(sastatus, buf, 1, ' ', sizeof sastatus);
- extract_token(sascore, buf, 3, ' ', sizeof sascore);
- extract_token(saoutof, buf, 5, ' ', sizeof saoutof);
-
- memcpy(buf, HKEY("X-Spam-Level: "));
- cur = buf + 14;
- for (numscore = atoi(sascore); numscore>0; numscore--)
- *(cur++) = '*';
- *cur = '\0';
-
- headerlen = cur - buf;
- headerlen += snprintf(cur, (sizeof(buf) - headerlen),
- "\r\nX-Spam-Status: %s, score=%s required=%s\r\n",
- sastatus, sascore, saoutof);
-
- CM_PrependToField(msg, eMesageText, buf, headerlen);
-
- } else {
- syslog(LOG_DEBUG, "reject spam code used");
- if (!strncasecmp(buf, "Spam: True", 10)) {
- is_spam = 1;
- }
-
- if (is_spam) {
- CM_SetField(msg, eErrorMsg, HKEY("message rejected by spam filter"));
- }
- }
-
-bail: close(sock);
- FreeStrBuf(&CCC->SBuf.Buf);
- FreeStrBuf(&CCC->sMigrateBuf);
- return(is_spam);
-}
-
-
-
-CTDL_MODULE_INIT(spam)
-{
- if (!threading)
- {
- CtdlRegisterMessageHook(spam_assassin, EVT_SMTPSCAN);
- }
-
- /* return our module name for the log */
- return "spam";
-}
projects / citadel.git / blobdiff