From 335bd0d855dc2cd0b2b6c1f666fd7402afb591ca Mon Sep 17 00:00:00 2001 From: Dimitri Sokolyuk Date: Tue, 9 Mar 2010 16:37:48 +0000 Subject: bogom 1.9.2 import --- CHANGELOG | 249 ++++++++++ COPYING | 340 +++++++++++++ Makefile | 30 ++ README | 107 ++++ README.solaris | 37 ++ bogom.8 | 312 ++++++++++++ bogom.conf-example | 120 +++++ conf.c | 365 ++++++++++++++ conf.h | 49 ++ milter.c | 1385 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 10 files changed, 2994 insertions(+) create mode 100644 CHANGELOG create mode 100644 COPYING create mode 100644 Makefile create mode 100644 README create mode 100644 README.solaris create mode 100644 bogom.8 create mode 100644 bogom.conf-example create mode 100644 conf.c create mode 100644 conf.h create mode 100644 milter.c diff --git a/CHANGELOG b/CHANGELOG new file mode 100644 index 0000000..c9f03e5 --- /dev/null +++ b/CHANGELOG @@ -0,0 +1,249 @@ +2008-06-25 Juan J. Martínez + + * milter.c: FIX: hostaddr may be NULL if not supported by current version of milter or if the SMTP connection is made via stdin, noticed using milter with postfix - Thanks to Victor Balada Diaz + +2008-01-18 Juan J. Martínez + + * milter.c: + fix: added an include to avoid a warning while compiling under Linux + +=== release 1.9.1 + +2007-11-24 Juan J. Martínez + + * milter.c: + portability: extra flag in some stdio functions to avoid file descriptor limit issue on Solaris 10, thanks to Sergey Shapovalov + +2007-10-01 Juan J. Martínez + + * conf.c: + fix: error reading configuration when the last token was at EOF, thanks to Mikel Ward for the report + +2007-02-28 Juan J. Martínez + + * milter.c: Fix: space missing in a log entry. + +2007-02-08 Juan J. Martínez + + * bogom.8, conf.c, conf.h, milter.c: copyright year + +2007-02-04 Juan J. Martínez + + * milter.c: Error handling while reading bogofilter spamicity response. + +2006-10-22 Juan J. Martínez + + * bogom.8, bogom.conf-example, milter.c: + smpamicity support for the X-Bogosity header + +2006-10-08 Juan J. Martínez + + * milter.c: Avoid multiple X-Bogosity headers. + +2006-01-05 Juan J. Martínez + + * milter.c: + fix: xxfi_header is called *zero* or more times (check http://www.usebox.net/jjm/bogom/errata/bogom-errata-2006-1.txt) + +2005-11-19 Juan J. Martínez + + * milter.c: fix: include changes to support MAXHOSTNAMELEN constant + +2005-11-13 Juan J. Martínez + + * conf.c: Code cleanning. + +2005-11-06 Juan J. Martínez + + * milter.c: sprintf to snprintf + +2005-09-23 Juan J. Martínez + + * bogom.8, bogom.conf-example, milter.c: + Added quarantine_mdir feature (-q option) + +2005-09-12 Juan J. Martínez + + * milter.c: Better logging for forward_spam and subj_tag. + + * bogom.8, bogom.conf-example, milter.c: + Added forward_spam feature (-f option) + +2005-04-14 Juan J. Martínez + + * milter.c: + fix: wrong size on calloc, thanks to Jason M. for his feedback + + * milter.c: fixes for solaris compatibility + +2005-04-04 Juan J. Martínez + + * bogom.8, bogom.conf-example, milter.c: + new configuration option 'subject_tag' + +2005-03-30 Juan J. Martínez + + * milter.c: ifndef for default username, it makes porting easier + +2005-02-16 Juan J. Martínez + + * conf.c: fix: missing conf file is not an error + +2005-02-15 Juan J. Martínez + + * bogom.conf-example: pidfile added + + * bogom.8, milter.c: option changes: '-p pipe' becomes '-s conn' and + '-p pidfile' has been added (plus pidfile conf token) + +2005-02-09 Juan J. Martínez + + * milter.c: setup time to timezone before openlog + +2005-02-07 Juan J. Martínez + + * milter.c: + fix: the order seteuid followed by setuid returns 0 / -1 under NetBSD + swaping those commands (setuid and later seteuid) rocks and seems to not + matter under OpenBSD - thanks to Heron Gallegos + +2005-02-04 Juan J. Martínez + + * bogom.8: seems openbsd doesn't support !prog1,prog2 on syslog.conf + +2005-02-02 Juan J. Martínez + + * conf.c: fix: type size_t to int + +2005-02-01 Juan J. Martínez + + * milter.c: + fix: memory leak in conf reading routines, thanks to Dariusz Kulinski + +2005-01-31 Juan J. Martínez + + * bogom.8: some fixes + +2005-01-29 Juan J. Martínez + + * milter.c: fix: misstyped word + +2005-01-28 Juan J. Martínez + + * bogom.8: -d option added and syslog.conf tips + little rewrite of some parts + + * milter.c: -d option added and better debug messages + fix: -l option missed on getopt + +2005-01-27 Juan J. Martínez + + * bogom.conf-example, bogom.8, milter.c: added body_limit option + + * conf.c: use isspace instead custom is_blank + +2005-01-26 Juan J. Martínez + + * milter.c: + added mlfi_abort to handle message abort on multi-message connections + + * milter.c: fix: return 1 on error reading conf + +2005-01-25 Juan J. Martínez + + * milter.c: + re_envrcpt added (thanks to Dariusz Kulinski for his feedback) + fix: exit after configuration error + and little code clean + + * bogom.8: re_envrcpt added + + * bogom.conf-example: re_envrcpt example added + +2005-01-23 Juan J. Martínez + + * milter.c: + fix: smfi_getpriv may return NULL on mlfi_close due re_connection and + that should not be logged as error + + * conf.c, conf.h: year on copyright line + +2005-01-22 Juan J. Martínez + + * bogom.conf-example: re_connection added + + * milter.c, bogom.8: + -w option removed, re_connection added, year on copyright line + +2005-01-10 Juan J. Martínez + + * milter.c, conf.h, conf.c: Macro fixes and little code clean. + +2005-01-09 Juan J. Martínez + + * conf.c: Added missing rcsid + +2005-01-08 Juan J. Martínez + + * conf.c: fix: backslash escaped quotes now works (both \" and \') + Quoted string now can use single quotes also + + * milter.c: fix: configuration takes precedence over command line + + * bogom.8: fix: configuration takes precedence over command line + fix: backslash escaped quotes now works (both \" and \') + Quoted string now can use single quotes also + +2005-01-04 Juan J. Martínez + + * milter.c, bogom.8: + -w option deprecated (now configuration file must be used). + +2005-01-03 Juan J. Martínez + + * bogom.conf-example: fix: typo on exclude_string examples. + +2005-01-02 Juan J. Martínez + + * bogom.conf-example, bogom.8, milter.c: + Configurable text for the SMTP reject reply. + + * bogom.8: Added -c conf_file option. + Configuration file description. + + * milter.c: Added -c conf_file option. + Added configuration file support. + + * conf.h, conf.c, bogom.conf-example: New file. + +2004-12-31 Juan J. Martínez + + * milter.c: fix: whitelist list processing + +2004-12-29 Juan J. Martínez + + * bogom.8: fix: D1 macros + + * bogom.8: -w re_whitelist option added + + * milter.c: -w re_whitelist option added + Define a white list using regular expressions vs the sender address. + + * milter.c: Removed unneeded includes + +2004-12-28 Juan J. Martínez + + * bogom.8: Added sendmail setup information. + + * bogom.8: Better description of logging. + +2004-12-27 Juan J. Martínez + + * bogom.8: -x exclude_string added + + * milter.c: -x exclude_string added + If this string is found in the Subject of a message, it will be + automatically accepted. + + * bogom.8, milter.c: New file. + diff --git a/COPYING b/COPYING new file mode 100644 index 0000000..5b6e7c6 --- /dev/null +++ b/COPYING @@ -0,0 +1,340 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc. + 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. By contrast, the GNU General Public +License is intended to guarantee your freedom to share and change free +software--to make sure the software is free for all its users. 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If this is what you want to do, use the GNU Library General +Public License instead of this License. diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..924ae31 --- /dev/null +++ b/Makefile @@ -0,0 +1,30 @@ +OBJS=bogom.o conf.o +BIN=bogom +MAN=bogom.8 + +# default instalation prefix +PREFIX=/usr/local + +# edit to fit your system configuration +CPPFLAGS= +CFLAGS+=-Wall -g +LDFLAGS= +LIBS+=-lmilter -lpthread + +all: $(BIN) + +bogom.o: milter.c conf.h + $(CC) $(CPPFLAGS) $(CFLAGS) -c milter.c -o bogom.o +conf.o: conf.c conf.h + $(CC) $(CPPFLAGS) $(CFLAGS) -c conf.c -o conf.o + +$(BIN): $(OBJS) + $(CC) $(LDFLAGS) -o $(BIN) $(OBJS) $(LIBS) + +install: $(BIN) $(MAN) + cp -f $(BIN) $(PREFIX)/libexec + cp -f $(MAN) $(PREFIX)/man/man8 + +clean: + rm -f $(BIN) $(OBJS) + diff --git a/README b/README new file mode 100644 index 0000000..38ce789 --- /dev/null +++ b/README @@ -0,0 +1,107 @@ +bogom - simple sendmail milter to interface bogofilter +Copyright (C) 2004-2007 Juan J. Martinez + + +Required +-------- + +This milter requires libmiter API for sendmail 8.13.x or later. +Installing bogofilter is a good idea also. + +Bogom has been developed and tested with the following: + + sendmail 8.13.0 and 8.14.1 + bogofilter 0.92.8 (with BerkeleyDB 4.2.52) + + +Build and Install +----------------- + +This milter has been developed in OpenBSD, so you may need to tweak the +Makefile in order to compile it in other systems. + +Check README.* files for specific notes. + +On most Linux and BSD based systems, simply try: + +$ make +$ su +# make install + +Bogom has been packaged for FreeBSD (mail/milter-bogom) and non officially for +some Linux distributions. + +IMPORTANT: since 1.8.1+ the bogom binary is installed into $(PREFIX)/libexec, + so be sure to remove $(PREFIX)/sbin/bogom from any previous + installation. + + +Unprivileged user +----------------- + +When root starts bogom, the program drops its privileges to another user. It's +a good idea you create a new user to run the milter. By default bogofilter user +is expected. + +# mkdir /var/spool/bogofilter + +Configure bogofilter with: + +bogofilter_dir=/var/spool/bogofilter + +... and create your intial words database. + +After that, setup the environment with: + +# chown -R bogofilter:bogofilter /var/spool/bogofilter +# chmod 700 /var/spool/bogofilter +# chmod 600 /var/spool/bogofilter/wordlist.db + + +Custom installation step by step +-------------------------------- + +bogom provides some defaults, but don't have to stick into them. + +Here follows a 'step by step' quickstart to configure bogom and bogofilter. + ++ Install bogofilter ++ Install bogom ++ Create the '_bogom' user and group ++ Create the directories and apply permissions: + +# mkdir -p /var/run/bogom && chown _bogom:_bogom /var/run/bogom +# mkdir -p /var/db/bogofilter && chown _bogom:_bogom /var/db/bogofilter + ++ Copy the example bogofilter.cf file into /etc and edit it: + +bogofilter_dir=/var/db/bogofilter + ++ Setup bogofilter database. About 500 messages of spam/ham will be nice: + +# su _bogom -c "bogofilter -s < spam.mbox" +# su _bogom -c "bogofilter -n < ham.mbox" + +(use su with -m option if _bogom user doesn't have shell account) + ++ Install the example conf file at /etc/bogom.conf and edit it. At least +you should set up: + +user "_bogom" +pidfile "/var/run/bogom/bogom.pid" +connection "unix:/var/run/bogom/milter.sock" + ++ Add to your sendmail mc file: + +INPUT_MAIL_FILTER(`bogom',\ +`S=unix:/var/run/bogom/milter.sock, T=S:30s;R:1m') + +(rebuild and install the cf file) + ++ Add bogom to your rc or init.d scripts ++ Restart sendmail ++ Exec bogom or reboot the system + + +* EOF * + diff --git a/README.solaris b/README.solaris new file mode 100644 index 0000000..eb90553 --- /dev/null +++ b/README.solaris @@ -0,0 +1,37 @@ +Solaris notes +------------- + +The information in README applies, so read it too. + +Tested with: + + bogom 1.8.2 + Solaris 10 + gcc 3.4.3 + Sendmail 8.13.3+Sun + +Build command: + + $ gmake CC=gcc LIBS="-lmilter -lpthread -lsocket -lnsl" + +Caveats: + + Man page is in BSD man pages' format and needs mdoc macros + +About file descriptor limit: + + This is a problem related to 23-bit applications running on + Solaris, that has been fixed on Solaris 10. + + There have been reports of this issue with the milter under + high load and several threads running. The milter was built + with Sun Strudio 12. + + bogom 1.9.1 and later have a fix, but this hasn't been tested + deeply. + + Further information: + http://developers.sun.com/solaris/articles/stdio_256.html + +* EOF * + diff --git a/bogom.8 b/bogom.8 new file mode 100644 index 0000000..5c4b119 --- /dev/null +++ b/bogom.8 @@ -0,0 +1,312 @@ +.\" $Id$ +.\" +.\" bogom, simple sendmail milter to interface bogofilter +.\" Copyright (C) 2004-2007 Juan J. Martinez +.\" +.\" This program is free software; you can redistribute it and/or modify +.\" it under the terms of the GNU General Public License Version 2 as +.\" published by the Free Software Foundation. +.\" +.\" 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., 675 Mass Ave, Cambridge, MA 02139, USA. +.\" +.Dd December 25, 2004 +.Dt BOGOM 8 +.Os +.Sh NAME +.Nm bogom +.Nd simple sendmail milter to interface bogofilter +.Sh SYNOPSIS +.Nm +.Op Fl R | Fl D +.Op Fl t +.Op Fl v +.Op Fl S +.Op Fl u Ar user +.Op Fl s Ar conn +.Op Fl b Ar bogo_path +.Op Fl x Ar exclude_string +.Op Fl c Ar conf_file +.Op Fl l Ar body_limit +.Op Fl p Ar pidfile +.Op Fl f Ar forward_spam +.Op Fl q Ar quarantine_mdir +.Op Fl d +.Sh DESCRIPTION +The +.Nm +plugin can be used with the milter API of +.Xr sendmail 8 +to filter mails using +.Xr bogofilter 1 +bayesian filter. +.Pp +.Nm +is intended to be used with only one words database for the whole system. +.Pp +The options are as follows: +.Bl -tag -width "-x exclude_string" +.It Fl R +Reject mail classified as spam +.It Fl D +Discard mail classified as spam +.It Fl t +Train bogofilter with the mail classified as spam/ham +.It Fl v +Verbose logging +.It Fl S +Use spamicity header. Read configuration file section for further details. +.It Fl u Ar user +User to run the milter. +Default: bogofilter +.It Fl s Ar conn +Path to the pipe to connect sendmail. Default: +.Pa unix:/var/spool/bogofilter/milter.sock +.It Fl b Ar bogo_path +Path to the +.Xr bogofilter 1 +binary. +Default: +.Pa /usr/local/bin/bogofilter +.It Fl x Ar exclude_string +If this string is found in the Subject of a message, it will be +automatically accepted and no filtering operation will be done. +.It Fl c Ar conf_file +Path to the configuration file. +Default: +.Pa /etc/bogom.conf +.It Fl l Ar body_limit +Length limit in bytes to be processed from mail body. The rest of the body +will be discarded and not analyzed by the filter. +Default: +.Pa no limit +.It Fl p Ar pidfile +Path to the file to store the pid of the milter. The pidfile is created +after the milter drops privileges and the user to run the milter +must have write permission to the specified file. Default: +.Pa /var/spool/bogofilter/bogom.pid +.It Fl f Ar forward_spam +Set a recipient to forward any message classified as spam. Read configuration +file section for further details. +.It Fl q Ar quarantine_mdir +Path to a directory to deliver a copy of any message classified as spam. The +messages are stored in +.Xr maildir 5 +format. +.It Fl d +Enable debug messages (implies verbose logging) +.El +.Pp +Default policy is to add the +.Em X-Bogosity +header (Yes, No, Unsure) and deliver the mail. This can be changed with +.Cm -R +or +.Cm -D +when +bogofilter classifies the mail as spam. +.Pp +In bogofilter's configuration the +.Em bogofilter_dir +token should be set to the directory with system database, usually +.Pa /var/spool/bogofilter , +in bogofilter's configuration, or simply the words database of the +unprivileged user running the milter can be used. +.Pp +.Nm +uses a temporal file to store each individual message and forks a new +process to scan it with bogofilter. This temporal file uses +.Pa /tmp +directory by default, it's owned by the user running the milter and has +0600 mode. When a directory is specified in +.Em quarantine_mdir , +the +.Pa tmp +subdirectory in that maildir is used as temporal directory. +.Pp +The option +.Cm -t +registers the mail after classifying it as spam or ham. +This option can be dangerous because the filter may register errors, so +you should read carefully bogofilter's manual regarding this point. +.Sh SENDMAIL SETUP +Milter support in sendmail binary can be verified with: +.Pp +.D1 # sendmail -d0.1 -bv root | grep MILTER +.D1 Compiled with: DNSMAP LOG MAP_REGEX MATCHGECOS MILTER MIME7TO8 MIME8TO7 +.Pp +The milter can be added to sendmail's configuration by adding the following +lines to the mc file: +.Pp +.D1 INPUT_MAIL_FILTER(`bogom', +.D1 `S=unix:/var/spool/bogofilter/milter.sock, T=S:30s;R:1m') +.Pp +It assumes the default place for the communication socket. +.Pp +The cf file must be rebuilt and sendmail restarted. +.Sh CONFIGURATION FILE +Configuration file supports following tokens: +.Bd -literal + # line comment + + policy (pass|reject|discard) + default: policy pass + + reject "" + default: empty + (sendmail default is "Command rejected") + + subject_tag "" + default: empty + + verbose (0|1) + default: verbose 0 + + spamicity_header (0|1) + default: spamicity_header 0 + + bogofilter "" + default: bogofilter "/usr/local/bin/bogofilter" + + training (0|1) + default: training 0 + + body_limit + default: no limit + + user "" + default: user "bogofilter" + + connection ":" + default: connection "unix:/var/spool/bogofilter/milter.sock" + + pidfile "" + default: pidfile "/var/spool/bogofilter/bogom.pid" + + exclude_string "" + default: empty + + forward_spam "" + default: empty + + quarantine_mdir "" + default: empty + + re_connection "" + default: empty + + re_envfrom "" + default: empty + + re_envrcpt "" + default: empty +.Ed +.Pp +Configuration takes precedence over command line. +.Pp +By default +.Em X-Bogosity +header will use 'Yes, tests=bogofilter', 'No, tests=bogofilter' and 'Unsure, +tests=bogofilter'. With +.Em spamicity_header +activated, the classification of 'Ham', 'Spam' or 'Unsure' plus the value +of spamicity will be used to tag the messages. +.Pp +.Em subject_tag +string will be prepend to message subject when it is identified as spam +and policy is pass. +.Pp +.Em body_limit +specifies the amount of bytes (K suffix for Kilobytes and M for Megabytes) +of message body that will be passed to bogofilter to be processed. +This option should help busy servers but is incompatible with +.Em quarantine_mdir +feature. +.Pp +.Em forward_spam +recipient will receive a copy of any message classified as spam when policy +is pass. Notice that the original destination recipients won't be modified +and general RELAY restrictions will apply. +.Pp +If a directory in +.Em quarantine_mdir +is specified, any message classified as spam will be delivered there in +maildir format. Neither reject nor discard policy affect this delivery, but +.Em body_limit +option is ignored. When a message is delivered, necessary subdirectories +are created (tmp and new only). Notice that tmp subdirectory in maildir is +used as temporal directory for +.Nm +process when this option is active. +.Pp +The +.Em re_* +tokens allow to add items to +.Em connection , +.Em envfrom +and +.Em envrcpt +white lists. Any message with client connection (both host and hostname, +if available), sender address or destination address matching the case +insensitive extended regular expression (explained in +.Xr re_format 7 ) +will be accepted and no filtering operation will be done. Those token can +be used more than once and all the regular expressions will be checked. +.Pp +Quoted strings can use single and double quotes, using backslash to escape both +characters. +. +.Sh LOGGING +.Nm +sends messages to +.Xr syslogd 8 +using +facility +daemon and +levels +err, notice, info and debug. +.Pp +By default only info and, when needed, err levels will be used. With +.Cm -v +option, extra information will be addressed with notice level plus the +log facility provided in bofogilter. +.Pp +.Cm -d +option enables debug level with very verbose logging. +.Pp +.Nm +activity can be logged to a separate file with following lines in +.Xr syslog.conf 5 : +.Bd -literal +!bogom +*.* /var/log/bogom +!bogofilter +*.* /var/log/bogom +.Ed +.Sh FILES +/etc/bogom.conf +.Sh SEE ALSO +.Xr sendmail 8 , +.Xr bogofilter 1 , +.Xr bogoutil 1 , +.Xr syslog.conf 5 , +.Xr syslogd 8 , +.Xr re_format 7 , +.Xr maildir 5 +.Pp +http://www.usebox.net/jjm/bogom/ +.Sh CAVEATS +By now SIGHUP is ignored. +.Sh HISTORY +The first version of +.Nm +was written in the end of 2004. +.Sh AUTHORS +Juan J. Martinez +.Aq jjm@usebox.net diff --git a/bogom.conf-example b/bogom.conf-example new file mode 100644 index 0000000..354797d --- /dev/null +++ b/bogom.conf-example @@ -0,0 +1,120 @@ +# +# $Id$ +# +# Example of bogom configuration +# + +# +# policy (pass|reject|discard) +# +# default: policy pass + +# +# reject "" +# +# reject "We don't accept junk mail" +# reject "Spam pattern detected" +# +# default: empty +# (sendmail's default is: "Command rejected") + +# +# subject_tag "" +# +# subject_tag "*SPAM*" +# subject_tag "[spam detected]" +# +# default: empty + +# +# verbose (0|1) +# +# default: verbose 0 + +# +# spamicity_header (0|1) +# +# default: spamicity_header 0 + +# +# bogofilter "" +# +# default: bogofilter "/usr/local/bin/bogofilter" + +# +# training (0|1) +# +# default: training 0 + +# +# body_limit +# +# body_limit 16000 +# body_limit 64k +# body_limit 1m +# +# default: no limit + +# +# user "" +# +# default: user "bogofilter" + +# +# connection ":" +# +# default: connection "unix:/var/spool/bogofilter/milter.sock" + +# +# pidfile "" +# +# default: pidfile "/var/spool/bogofilter/bogom.pid" + +# +# exclude_string "" +# +# exclude_string "[no-bogofilter]" +# exclude_string "*no filter*" +# +# default: empty + +# +# forward_spam "" +# +# forward_spam "spammaster" +# forward_spam "spam@other.domain.com" +# +# default: empty + +# +# quarantine_mdir "" +# +# quarantine_mdir "/var/spool/bogofilter/spam.mdir" +# +# default: empty + +# +# re_connection "" +# +# re_connection "192\.168\.0\." +# re_connection "openbsd\.org$" +# +# default: empty + +# +# re_envfrom "" +# +# re_envfrom "\.usebox\.net>$" +# re_envfrom "@usebox\.net>$" +# +# default: empty + +# +# re_envrcpt "" +# +# re_envrcpt "spamtrap@usebox\.net>$" +# re_envrcpt "ilikespam@" +# +# default: empty + +# EOF diff --git a/conf.c b/conf.c new file mode 100644 index 0000000..ab91625 --- /dev/null +++ b/conf.c @@ -0,0 +1,365 @@ +/* $Id$ */ + +/* +* conf.c, configuration reader and parser +* Copyright (C) 2004-2007 Juan J. Martinez +* +* This program is free software; you can redistribute it and/or modify +* it under the terms of the GNU General Public License Version 2 as +* published by the Free Software Foundation. +* +* 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., 675 Mass Ave, Cambridge, MA 02139, USA. +* +*/ + +#include +#include +#include +#include +#include + +#include "libmilter/mfapi.h" +#include "conf.h" + +#define new_string_list(x) do {\ + x=(struct string_list *) \ + malloc(sizeof(struct string_list));\ + x->n=NULL;\ + } while(0) + +static char * pstrncpy(char *, const char *, size_t); +static int parse_string(char *p); +static int parse_qstring(char *p); +static int parse_bool(char *p); +static char * parse_conf(struct conftoken *conf, char *p); + +static const char rcsid[]="$Id$"; + +/* +* strncpy alike function that parses scaped quotes +*/ +static char * +pstrncpy(char *d, const char *s, size_t l) +{ + size_t i, j; + + for(i=0, j=0; in=conf[i].sl; + conf[i].sl=t; + } + + conf[i].sl->s=(char *)malloc(len+1); + if(!conf[i].sl->s) + { + fprintf(stderr, "malloc\n"); + return p; + } + pstrncpy(conf[i].sl->s, p, len); + p+=len+1; + break; + } + break; + } + + if(conf[i].word) + { + while(isspace(*p)) + p++; + + if(!p[0]) + return NULL; + + fprintf(stderr, "parse error\n"); + return p; + } + + fprintf(stderr, "unknown token\n"); + + p[len]=0; + return p; +} + +/* +* reads and parses the configuration file +*/ +int +read_conf(const char *filename, struct conftoken *conf) +{ + FILE *fd; + char buffer[1024]; + char *ret; + int line, i; + + fd=fopen(filename, "r"); + if(!fd) + return 0; + + line=1; + while(!feof(fd)) + { + i=0; + *buffer=0; + do + { + if(i>1023) + { + fclose(fd); + fprintf(stderr, "conf line %i is too long\n", + line); + return 1; + } + + fscanf(fd, "%c", &buffer[i]); + + } while(buffer[i++]!='\n' && !feof(fd)); + + buffer[i]=0; + + ret=parse_conf(conf, buffer); + if(ret) + { + fclose(fd); + fprintf(stderr, "conf error at line %i, near: %s\n", + line, ret); + return 1; + } + + line++; + } + + fclose(fd); + + return 0; +} + +/* EOF */ diff --git a/conf.h b/conf.h new file mode 100644 index 0000000..36f8998 --- /dev/null +++ b/conf.h @@ -0,0 +1,49 @@ +/* $Id$ */ + +/* +* conf.h, configuration reader and parser include +* Copyright (C) 2004-2007 Juan J. Martinez +* +* This program is free software; you can redistribute it and/or modify +* it under the terms of the GNU General Public License Version 2 as +* published by the Free Software Foundation. +* +* 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., 675 Mass Ave, Cambridge, MA 02139, USA. +* +*/ + +#ifndef __BOGOM_CONF__ +#define __BOGOM_CONF__ + +#define REQ_NONE 0 +#define REQ_BOOL 1 +#define REQ_STRING 2 +#define REQ_QSTRING 3 +#define REQ_LSTQSTRING 4 + +struct string_list +{ + char *s; + struct string_list *n; +}; + +struct conftoken +{ + char *word; + int required; + char *str; + int bool; + struct string_list *sl; +}; + +int read_conf(const char *filename, struct conftoken *); + +#endif + diff --git a/milter.c b/milter.c new file mode 100644 index 0000000..d319164 --- /dev/null +++ b/milter.c @@ -0,0 +1,1385 @@ +/* $Id$ */ + +/* +* bogom, simple sendmail milter to interface bogofilter +* Copyright (C) 2004-2007 Juan J. Martinez +* +* This program is free software; you can redistribute it and/or modify +* it under the terms of the GNU General Public License Version 2 as +* published by the Free Software Foundation. +* +* 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., 675 Mass Ave, Cambridge, MA 02139, USA. +* +*/ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#ifdef __sun__ +#include +#endif + +#include "libmilter/mfapi.h" +#include "conf.h" + +/* defaults */ +#ifndef DEF_USER +#define DEF_USER "bogofilter" +#endif +#ifndef DEF_CONN +#define DEF_CONN "unix:/var/spool/bogofilter/milter.sock" +#endif +#ifndef DEF_CONF +#define DEF_CONF "/etc/bogom.conf" +#endif +#ifndef DEF_PIDFILE +#define DEF_PIDFILE "/var/spool/bogofilter/bogom.pid" +#endif + +struct mlfiPriv +{ + FILE *f; + char *fullpath; + char *filename; + char *subject; + int eom; + size_t bodylen; + int old_headers; +}; + +sfsistat mlfi_connect(SMFICTX *, char *, _SOCK_ADDR *); +sfsistat mlfi_envfrom(SMFICTX *, char **); +sfsistat mlfi_envrcpt(SMFICTX *, char **); +sfsistat mlfi_header(SMFICTX *, char *, char *); +sfsistat mlfi_eoh(SMFICTX *); +sfsistat mlfi_body(SMFICTX *, unsigned char *, size_t); +sfsistat mlfi_eom(SMFICTX *); +sfsistat mlfi_abort(SMFICTX *); +sfsistat mlfi_close(SMFICTX *); +void mlfi_clean(SMFICTX *); +void usage(const char *); +int to_maildir(char *, char *); +char *hostname_tmp(); + +#ifdef __sun__ +int daemon(int, int); +#endif + +struct smfiDesc smfilter= +{ + "bogom", /* filter name */ + SMFI_VERSION, /* version code -- do not change */ + SMFIF_ADDHDRS | SMFIF_CHGHDRS | /* flags -- add and modify headers */ + SMFIF_ADDRCPT, /* -- add rcpt */ + mlfi_connect, /* connection info filter */ + NULL, /* SMTP HELO command filter */ + mlfi_envfrom, /* envelope sender filter */ + mlfi_envrcpt, /* envelope recipient filter */ + mlfi_header, /* header filter */ + mlfi_eoh, /* end of header */ + mlfi_body, /* body block filter */ + mlfi_eom, /* end of message */ + mlfi_abort, /* message aborted */ + mlfi_close /* connection cleanup */ +}; + +struct re_list +{ + regex_t p; + const char *pat; + struct re_list *n; +}; + +#define new_re_list(x) do {\ + x=(struct re_list *) \ + malloc(sizeof(struct re_list));\ + x->n=NULL;\ + } while(0) + +static const char rcsid[]="$Id$"; + +static int mode=SMFIS_CONTINUE; +static int train=0; +static int verbose=0; +static int debug=0; +static int spamicity=0; +static size_t bodylimit=0; +static const char *bogo="/usr/local/bin/bogofilter"; +static const char *exclude=NULL; +static const char *subj_tag=NULL; +static const char *forward_spam=NULL; +static char *quarantine_mdir=NULL; + +static char *reject=NULL; + +static struct re_list *re_c=NULL; /* re connection */ +static struct re_list *re_f=NULL; /* re envfrom */ +static struct re_list *re_r=NULL; /* re envrcpt */ + +#ifdef __sun__ +int +daemon(int nochdir, int noclose) +{ + int fd; + + switch(fork()) + { + case 0: + break; + + case -1: + return -1; + + default: + _exit(0); + } + + if(setsid()==-1) + return -1; + + if(!nochdir && chdir("/")) + return -1; + + if(!noclose) + { + fd=open("/dev/null", O_RDWR, 0); + if(fd==-1) + return -1; + + dup2(fd, fileno(stdin)); + dup2(fd, fileno(stdout)); + dup2(fd, fileno(stderr)); + } + + return 0; +} +#endif + +sfsistat +mlfi_connect(SMFICTX *ctx, char *hostname, _SOCK_ADDR *hostaddr) +{ + struct mlfiPriv *priv; + struct re_list *tre; /* temporal iterator */ + + const void *mysaddr=NULL; + char host[INET6_ADDRSTRLEN]; + + if(hostaddr) + { + switch(hostaddr->sa_family) + { + default: + syslog(LOG_ERR, "mlfi_connet: unsupported sa_family"); + break; + + case AF_INET: + mysaddr=(const void *)&((struct sockaddr_in *)hostaddr) + ->sin_addr.s_addr; + break; + + case AF_INET6: + mysaddr=(const void *)&((struct sockaddr_in6 *)hostaddr) + ->sin6_addr; + break; + } + + if(!inet_ntop(hostaddr->sa_family, mysaddr, host, sizeof(host))) + { + syslog(LOG_ERR, "mlfi_connect: inet_ntop failed"); + strcpy(host, "*"); + } + } + else + strcpy(host, "*"); + + if(debug) + syslog(LOG_DEBUG, "connection from %s [ %s ]", hostname, host); + + for(tre=re_c; tre; tre=tre->n) + { + if(!regexec(&tre->p, hostname, 0, NULL, 0)) + { + if(verbose) + syslog(LOG_INFO, + "accepted due pattern match (connect): %s", + tre->pat); + + return SMFIS_ACCEPT; + } + + if(!regexec(&tre->p, host, 0, NULL, 0)) + { + if(verbose) + syslog(LOG_INFO, + "accepted due pattern match (connect): %s", + tre->pat); + return SMFIS_ACCEPT; + } + } + + priv=(struct mlfiPriv *)malloc(sizeof(struct mlfiPriv)); + if(!priv) + { + syslog(LOG_ERR, "Unable to get memory: %s", + strerror(errno)); + return SMFIS_TEMPFAIL; + } + + priv->fullpath=NULL; + priv->filename=NULL; + priv->subject=NULL; + priv->f=NULL; + priv->eom=1; + priv->old_headers=0; + + if(smfi_setpriv(ctx, priv)!=MI_SUCCESS) + { + syslog(LOG_ERR, "on mlfi_connect: smfi_setpriv"); + return SMFIS_ACCEPT; + } + + return SMFIS_CONTINUE; +} + +sfsistat +mlfi_envfrom(SMFICTX *ctx, char **argv) +{ + struct re_list *tre; /* temporal iterator */ + + if(debug) + syslog(LOG_DEBUG, "envfrom %s", argv[0]); + + for(tre=re_f; tre; tre=tre->n) + if(!regexec(&tre->p, argv[0], 0, NULL, 0)) + { + if(verbose) + syslog(LOG_INFO, + "accepted due pattern match (envfrom): %s", + tre->pat); + return SMFIS_ACCEPT; + } + + return SMFIS_CONTINUE; +} + +sfsistat +mlfi_envrcpt(SMFICTX *ctx, char **argv) +{ + struct mlfiPriv *priv; + struct re_list *tre; /* temporal iterator */ + int fd=-1; + char *tmp=NULL; + + if(debug) + syslog(LOG_DEBUG, "envrcpt %s", argv[0]); + + for(tre=re_r; tre; tre=tre->n) + if(!regexec(&tre->p, argv[0], 0, NULL, 0)) + { + if(verbose) + syslog(LOG_INFO, + "accepted due pattern match (envrcpt): %s", + tre->pat); + return SMFIS_ACCEPT; + } + + priv=(struct mlfiPriv *)smfi_getpriv(ctx); + if(!priv) + { + syslog(LOG_ERR, "on mlfi_header: smfi_getpriv"); + return SMFIS_ACCEPT; + } + + if(priv->eom) + { + /* use tmp/ from quarantine maildir if available */ + if(quarantine_mdir) + { + tmp=hostname_tmp(); + if(!tmp) + { + syslog(LOG_ERR, "Unable to get memory: %s", + strerror(errno)); + return SMFIS_TEMPFAIL; + } + + priv->fullpath=(char *)calloc(strlen(quarantine_mdir) + +strlen(tmp)+6, sizeof(char)); + } + else + priv->fullpath=strdup("/tmp/bogom-msg.XXXXXXXXXX"); + + if(!priv->fullpath) + { + syslog(LOG_ERR, "Unable to get memory: %s", + strerror(errno)); + if(tmp) + free(tmp); + return SMFIS_TEMPFAIL; + } + + if(quarantine_mdir) + { + snprintf(priv->fullpath, strlen(quarantine_mdir)+ + strlen(tmp)+6, "%s/tmp/%s", quarantine_mdir, + tmp); + priv->filename=priv->fullpath+strlen(quarantine_mdir) + +5; + free(tmp); + } + + fd=mkstemp(priv->fullpath); + if(fd==-1) + { + syslog(LOG_ERR, "Unable to create tmp file in %s: %s", + priv->fullpath, strerror(errno)); + + mlfi_clean(ctx); + return SMFIS_TEMPFAIL; + } + +#ifdef __sun__ + priv->f=fdopen(fd, "w+F"); +#else + priv->f=fdopen(fd, "w+"); +#endif + if(!priv->f) + { + syslog(LOG_ERR, "Unable to create tmp file in %s: %s", + priv->fullpath, strerror(errno)); + + if(fd!=-1) + close(fd); + + mlfi_clean(ctx); + return SMFIS_TEMPFAIL; + } + + priv->eom=0; + priv->bodylen=0; + + if(debug) + syslog(LOG_DEBUG, "message begin..."); + } + + return SMFIS_CONTINUE; +} + +sfsistat +mlfi_header(SMFICTX *ctx, char *headerf, char *headerv) +{ + struct mlfiPriv *priv; + + priv=(struct mlfiPriv *)smfi_getpriv(ctx); + if(!priv) + { + syslog(LOG_ERR, "on mlfi_header: smfi_getpriv"); + return SMFIS_ACCEPT; + } + + if(exclude && headerv) + if(!strcasecmp(headerf, "Subject")) + if(strstr(headerv, exclude)) + { + if(verbose) + syslog(LOG_INFO, + "exclude string found: '%s'", + headerv); + mlfi_clean(ctx); + return SMFIS_ACCEPT; + } + + if(debug) + syslog(LOG_DEBUG, "header %s [%s]", headerf, headerv); + + if(headerv && !strcasecmp(headerf, "X-Bogosity")) + priv->old_headers++; + + if(subj_tag && headerv) + if(!strcasecmp(headerf, "Subject")) + { + if(priv->subject) + syslog(LOG_INFO, + "Subject header not unique"); + else + { + priv->subject=strdup(headerv); + if(!priv->subject) + syslog(LOG_ERR, + "Unable to get memory (subject" + " tag): %s", + strerror(errno)); + } + } + + if(fprintf(priv->f, "%s: %s\n", headerf, headerv)==EOF) + { + syslog(LOG_ERR, "failed to write into %s: %s", + priv->fullpath, strerror(errno)); + mlfi_clean(ctx); + return SMFIS_TEMPFAIL; + } + + return SMFIS_CONTINUE; +} + +sfsistat +mlfi_eoh(SMFICTX *ctx) +{ + struct mlfiPriv *priv; + + if(debug) + syslog(LOG_DEBUG, "headers ok"); + + priv=(struct mlfiPriv *)smfi_getpriv(ctx); + if(!priv) + { + syslog(LOG_ERR, "on mlfi_eoh: smfi_getpriv"); + return SMFIS_ACCEPT; + } + + if(fprintf(priv->f, "\n")==EOF) + { + syslog(LOG_ERR, "failed to write into %s: %s", + priv->fullpath, strerror(errno)); + mlfi_clean(ctx); + return SMFIS_TEMPFAIL; + } + + return SMFIS_CONTINUE; +} + +sfsistat +mlfi_body(SMFICTX *ctx, unsigned char *bodyp, size_t bodylen) +{ + struct mlfiPriv *priv; + + priv=(struct mlfiPriv *)smfi_getpriv(ctx); + if(!priv) + { + syslog(LOG_ERR, "on mlfi_body: smfi_getpriv"); + return SMFIS_ACCEPT; + } + + if(bodylimit) + { + if(bodylimit==priv->bodylen) + { + if(debug) + syslog(LOG_DEBUG, "body_limit reached, " + " %d bytes discarded", bodylen); + + bodylen=0; + } + else + if(priv->bodylen+bodylen>bodylimit) + { + if(debug) + syslog(LOG_DEBUG, "body_limit reached, " + " %d bytes discarded", + bodylen-(bodylimit-priv->bodylen)); + + bodylen=bodylimit-priv->bodylen; + } + } + + if(bodylen>0) + { + if(fwrite(bodyp, bodylen, 1, priv->f)!=1) + { + syslog(LOG_ERR, "failed to write into %s: %s", + priv->fullpath, strerror(errno)); + mlfi_clean(ctx); + return SMFIS_TEMPFAIL; + } + else + { + if(debug) + syslog(LOG_DEBUG, "%d body bytes written", + bodylen); + + priv->bodylen+=bodylen; + } + } + + return SMFIS_CONTINUE; +} + +sfsistat +mlfi_eom(SMFICTX *ctx) +{ + struct mlfiPriv *priv; + int status, i; + char *bogocl, header[64]; + float spamicity_val; + char *tmp_subj; + FILE *proc; + + if(debug) + syslog(LOG_DEBUG, "...end of message"); + + priv=(struct mlfiPriv *)smfi_getpriv(ctx); + if(!priv) + { + syslog(LOG_ERR, "on mlfi_eom: smfi_getpriv"); + return SMFIS_ACCEPT; + } + + fclose(priv->f); + priv->f=NULL; + + bogocl=(char *)malloc(strlen(bogo)+strlen(priv->fullpath)+16); + if(!bogocl) + { + syslog(LOG_ERR, "on mlfi_eom: %s", strerror(errno)); + mlfi_clean(ctx); + return SMFIS_CONTINUE; + } + + sprintf(bogocl, "%s -", bogo); + + if(train) + strcat(bogocl, "u"); + + if(verbose) + strcat(bogocl, "l"); + + if(spamicity) + strcat(bogocl, "TT"); + + strcat(bogocl, "B "); + strcat(bogocl, priv->fullpath); + +#ifdef __sun__ + proc=popen(bogocl, "rF"); +#else + proc=popen(bogocl, "r"); +#endif + if(!proc) + { + syslog(LOG_ERR, "failed to exec bogofilter: %s", + strerror(errno)); + free(bogocl); + mlfi_clean(ctx); + return SMFIS_CONTINUE; + } + free(bogocl); + + if(spamicity) + { + /* FIXME: spaces in the path will cause trouble */ + if(fscanf(proc, "%*[^ ] %f\n", &spamicity_val)!=1) + { + syslog(LOG_ERR, "failed to get bogofilter spamicity " + "value"); + spamicity_val=-1; + } + else + if(debug) + syslog(LOG_DEBUG, "spamicity value: %f", + spamicity_val); + } + + status=pclose(proc); + + if(!WIFEXITED(status)) + { + syslog(LOG_ERR, "bogofilter didn't exit normally"); + mlfi_clean(ctx); + return SMFIS_CONTINUE; + } + + switch(WEXITSTATUS(status)) + { + case 3: + case -1: + syslog(LOG_ERR, "bogofilter reply: I/O error"); + mlfi_clean(ctx); + return SMFIS_CONTINUE; + case 0: + if(spamicity && spamicity_val!=-1) + snprintf(header, 64, "Spam, spamicity=%.6f", + spamicity_val); + else + strcpy(header, "Yes, tests=bogofilter"); + smfi_insheader(ctx, 0, "X-Bogosity", header); + + priv->old_headers++; + + if(forward_spam) + { + if(smfi_addrcpt(ctx, (char *)forward_spam) + !=MI_SUCCESS) + syslog(LOG_ERR, "forward_spam failed:" + " '%s'", forward_spam); + else + if(debug) + syslog(LOG_DEBUG, + "forward_spam rcpt added: " + "'%s'", forward_spam); + } + + if(subj_tag && priv->subject) + { + tmp_subj=(char *)calloc(strlen(subj_tag)+ + strlen(priv->subject)+2, sizeof(char)); + + if(!tmp_subj) + syslog(LOG_ERR, "Unable to get memory:" + " %s", strerror(errno)); + else + { + snprintf(tmp_subj, strlen(subj_tag)+ + strlen(priv->subject)+2, + "%s %s", subj_tag, + priv->subject); + + /* truncate if needed and be nice + with RFC */ + if(strlen(tmp_subj)>998) + tmp_subj[998]=0; + + if(smfi_chgheader(ctx, "Subject", 1, + tmp_subj)!=MI_SUCCESS) + syslog(LOG_ERR, "subject_tag" + " failed: '%s'", + tmp_subj); + else + if(debug) + syslog(LOG_DEBUG, + "subject_tag" + " added: '%s'", + tmp_subj); + free(tmp_subj); + } + } + + if(verbose) + { + if(mode==SMFIS_CONTINUE) + syslog(LOG_NOTICE, + "bogofilter reply: spam"); + else + if(mode==SMFIS_REJECT) + syslog(LOG_NOTICE, + "spam rejected"); + else + syslog(LOG_NOTICE, + "spam discarded"); + } + + if(mode==SMFIS_REJECT && reject) + smfi_setreply(ctx, "554", "5.7.1", reject); + + if(quarantine_mdir) + { + if(debug) + syslog(LOG_DEBUG, "copying message " + "to quarantine_mdir"); + + if(chdir(quarantine_mdir)==-1) + syslog(LOG_ERR, "failed to chdir to " + "quarantine_mdir: %s\n", + strerror(errno)); + else + if(to_maildir(priv->fullpath, + priv->filename)==-1) + syslog(LOG_ERR, "failed to" + " copy message to " + "quarantine_mdir"); + } + + mlfi_clean(ctx); + return mode; + case 1: + if(spamicity && spamicity_val!=-1) + snprintf(header, 64, "Ham, spamicity=%.6f", + spamicity_val); + else + strcpy(header, "No, tests=bogofilter"); + smfi_insheader(ctx, 0, "X-Bogosity", header); + + priv->old_headers++; + + if(verbose) + syslog(LOG_NOTICE, "bogofilter reply: ham"); + break; + case 2: + if(spamicity && spamicity_val!=-1) + snprintf(header, 64, "Unsure, spamicity=%.6f", + spamicity_val); + else + strcpy(header, "Unsure, tests=bogofilter"); + smfi_insheader(ctx, 0, "X-Bogosity", header); + + priv->old_headers++; + + if(verbose) + syslog(LOG_NOTICE, "bogofilter reply: unsure"); + break; + default: + syslog(LOG_ERR, "bogofilter reply is unknown"); + break; + } + + if(priv->old_headers>1) + for(i=2, priv->old_headers++;iold_headers+1;i++) + { + smfi_chgheader(ctx, "X-Bogosity", i, NULL); + if(debug) + syslog(LOG_DEBUG, "previous header removed"); + } + + mlfi_clean(ctx); + return SMFIS_CONTINUE; +} + +sfsistat +mlfi_abort(SMFICTX *ctx) +{ + if(debug) + syslog(LOG_DEBUG, "message ABORTED"); + + mlfi_clean(ctx); + + return SMFIS_CONTINUE; +} + +sfsistat +mlfi_close(SMFICTX *ctx) +{ + struct mlfiPriv *priv; + + priv=(struct mlfiPriv *)smfi_getpriv(ctx); + if(!priv) + return SMFIS_CONTINUE; + + if(!priv->eom) + mlfi_clean(ctx); + + smfi_setpriv(ctx, NULL); + free(priv); + + if(debug) + syslog(LOG_DEBUG, "connection closed"); + + return SMFIS_CONTINUE; +} + +void +mlfi_clean(SMFICTX *ctx) +{ + struct mlfiPriv *priv; + + if(debug) + syslog(LOG_DEBUG, "cleaning message..."); + + priv=(struct mlfiPriv *)smfi_getpriv(ctx); + + if(!priv) + return; + + if(priv->f) + { + if(debug) + syslog(LOG_DEBUG, "closing tmp file"); + fclose(priv->f); + priv->f=NULL; + } + + if(priv->fullpath) + { + if(debug) + syslog(LOG_DEBUG, "removing tmp file"); + unlink(priv->fullpath); + free(priv->fullpath); + priv->fullpath=NULL; + } + + if(priv->subject) + { + free(priv->subject); + priv->subject=NULL; + } + + priv->eom=1; + priv->old_headers=0; + + if(debug) + syslog(LOG_DEBUG, "...cleaning done"); + + return; +} + +char * +hostname_tmp() +{ + char *p; + char myhostname[MAXHOSTNAMELEN+128]; + struct timeval tp; + + if(gettimeofday(&tp, NULL)==-1) + tp.tv_sec=time(NULL); + + /* time + hostname to make a unique filename NFS friendly */ + snprintf(myhostname, 117, "bogom_%lu.%lu.", tp.tv_sec, tp.tv_usec); + + if(gethostname(myhostname+strlen(myhostname), MAXHOSTNAMELEN)==-1) + { + syslog(LOG_NOTICE, "failed to get my hostname"); + strcpy(myhostname, "unknown_hostname"); + } + + p=myhostname; + while((p=strstr(p, "/"))) + *p='\057'; + + p=myhostname; + while((p=strstr(p, ":"))) + *p='\072'; + + strcat(myhostname, ".XXXXXXXXXX"); + + return strdup(myhostname); +} + +int +to_maildir(char *origin, char *filename) +{ + char *p; + struct stat st; + + /* caller must chdir to quarantine_mdir */ + + if(stat("new", &st)==-1 && errno==ENOENT) + if(mkdir("new", 0700)==-1) + { + syslog(LOG_ERR, "quarantine_mdir failed to " + "create new/: %s", strerror(errno)); + return -1; + } + + p=(char *)calloc(strlen(filename)+strlen(quarantine_mdir)+6, + sizeof(char)); + if(!p) + { + syslog(LOG_ERR, "quarantine_mdir failed to get memory: %s", + strerror(errno)); + return -1; + } + + snprintf(p, strlen(filename)+strlen(quarantine_mdir)+6, + "%s/new/%s\n", quarantine_mdir, filename); + + if(link(origin, p)==-1) + { + syslog(LOG_ERR, "quarantine_mdir failed to link file: %s", + strerror(errno)); + free(p); + return -1; + } + + free(p); + + return 0; +} + +void +usage(const char *argv0) +{ + fprintf(stderr, "usage: %s\t[-R | -D] [-t] [-v] [-u user] [-s conn]\n" + "\t\t[-b bogo_path ] [-x exclude_string] " + "[-c conf_file]\n\t\t[-l body_limit] [-p pidfile] " + "[-f forward_spam]\n" + "\t\t[-q quarantine_mdir] [-S] [-d]\n", argv0); + + return; +} + +int +main(int argc, char *argv[]) +{ + const char *user=DEF_USER; + const char *conn=DEF_CONN; + const char *pipe=NULL; + const char *conffile=DEF_CONF; + const char *pidfile=DEF_PIDFILE; + + FILE *pidfile_fd; + int result; + + struct re_list *tre; + struct string_list *tsl, *tsl2; + + /* configuration tokens */ + struct conftoken conf[]= + { + { "verbose", REQ_BOOL, NULL, -1, NULL }, + { "training", REQ_BOOL, NULL, -1, NULL }, + { "user", REQ_QSTRING, NULL, 0, NULL }, + { "connection", REQ_QSTRING, NULL, 0, NULL }, + { "exclude_string", REQ_QSTRING, NULL, 0, NULL }, + { "re_envfrom", REQ_LSTQSTRING, NULL, 0, NULL }, + { "bogofilter", REQ_QSTRING, NULL, 0, NULL }, + { "policy", REQ_STRING, NULL, 0, NULL }, + { "reject", REQ_QSTRING, NULL, 0, NULL }, + { "re_connection", REQ_LSTQSTRING, NULL, 0, NULL }, + { "re_envrcpt", REQ_LSTQSTRING, NULL, 0, NULL }, + { "body_limit", REQ_STRING, NULL, 0, NULL }, + { "pidfile", REQ_QSTRING, NULL, 0, NULL }, + { "subject_tag", REQ_QSTRING, NULL, 0, NULL }, + { "forward_spam", REQ_QSTRING, NULL, 0, NULL }, + { "quarantine_mdir", REQ_QSTRING, NULL, 0, NULL }, + { "spamicity_header", REQ_BOOL, NULL, -1, NULL }, + { NULL, 0, NULL, 0, NULL } + }; + + int opt; + const char *opts="hu:p:b:RDtvx:w:c:l:ds:f:q:S"; + + struct passwd *pw=NULL; + struct stat st; + + while((opt=getopt(argc, argv, opts))!=-1) + switch(opt) + { + case 'h': + default: + usage(argv[0]); + exit(1); + break; + + case 'u': + user=optarg; + break; + + case 's': + conn=optarg; + break; + + case 'b': + bogo=optarg; + break; + + case 'R': + mode=SMFIS_REJECT; + break; + + case 'D': + mode=SMFIS_DISCARD; + break; + + case 't': + train=1; + break; + + case 'v': + verbose=1; + break; + + case 'x': + exclude=optarg; + break; + + case 'c': + conffile=optarg; + break; + + case 'l': + bodylimit=(size_t)atol(optarg); + break; + + case 'd': + debug=1; + verbose=1; + break; + + case 'p': + pidfile=optarg; + break; + + case 'f': + forward_spam=optarg; + break; + + case 'q': + quarantine_mdir=optarg; + break; + + case 'S': + spamicity=1; + break; + } + + /* read configuration file */ + if(!read_conf(conffile, conf)) + { + if(conf[0].bool!=-1) + verbose=conf[0].bool; + + if(conf[1].bool!=-1) + train=conf[1].bool; + + if(conf[2].str) + user=conf[2].str; + + if(conf[3].str) + conn=conf[3].str; + + if(conf[4].str) + exclude=conf[4].str; + + if(conf[5].sl) + { + for(tsl=conf[5].sl; tsl; tsl=tsl->n, free(tsl2)) + { + if(!re_f) + { + new_re_list(re_f); + if(!re_f) + { + fprintf(stderr, + "unable to get memory: %s\n", + strerror(errno)); + return 1; + } + } + else + { + new_re_list(tre); + if(!tre) + { + fprintf(stderr, + "unable to get memory: %s\n", + strerror(errno)); + return 1; + } + tre->n=re_f; + re_f=tre; + } + + if(regcomp(&(re_f->p), tsl->s, REG_EXTENDED| + REG_ICASE|REG_NOSUB)) + { + fprintf(stderr,"Bad pattern: %s\n", + tsl->s); + return 1; + } + re_f->pat=tsl->s; + tsl2=tsl; + } + conf[5].sl=NULL; + } + + if(conf[6].str) + bogo=conf[6].str; + + if(conf[7].str) + { + if(!strcmp(conf[7].str, "pass")) + mode=SMFIS_CONTINUE; + else + { + if(!strcmp(conf[7].str, "reject")) + mode=SMFIS_REJECT; + else + { + if(!strcmp(conf[7].str, "discard")) + mode=SMFIS_DISCARD; + else + { + fprintf(stderr, "conf error:" + " unknown policy\n"); + return 1; + } + } + } + } + + if(conf[8].str) + reject=conf[8].str; + + if(conf[9].sl) + { + for(tsl=conf[9].sl; tsl; tsl=tsl->n, free(tsl2)) + { + if(!re_c) + { + new_re_list(re_c); + if(!re_c) + { + fprintf(stderr, + "unable to get memory: %s\n", + strerror(errno)); + return 1; + } + } + else + { + new_re_list(tre); + if(!tre) + { + fprintf(stderr, + "unable to get memory: %s\n", + strerror(errno)); + return 1; + } + tre->n=re_c; + re_c=tre; + } + + if(regcomp(&(re_c->p), tsl->s, REG_EXTENDED| + REG_ICASE|REG_NOSUB)) + { + fprintf(stderr,"Bad pattern: %s\n", + tsl->s); + return 1; + } + re_c->pat=tsl->s; + tsl2=tsl; + } + conf[9].sl=NULL; + } + + if(conf[10].sl) + { + for(tsl=conf[10].sl; tsl; tsl=tsl->n, free(tsl2)) + { + if(!re_r) + { + new_re_list(re_r); + if(!re_r) + { + fprintf(stderr, + "unable to get memory: %s\n", + strerror(errno)); + return 1; + } + } + else + { + new_re_list(tre); + if(!tre) + { + fprintf(stderr, + "unable to get memory: %s\n", + strerror(errno)); + return 1; + } + tre->n=re_r; + re_r=tre; + } + + if(regcomp(&(re_r->p), tsl->s, REG_EXTENDED| + REG_ICASE|REG_NOSUB)) + { + fprintf(stderr,"Bad pattern: %s\n", + tsl->s); + return 1; + } + re_r->pat=tsl->s; + tsl2=tsl; + } + conf[10].sl=NULL; + } + + if(conf[11].str) + { + bodylimit=atoi(conf[11].str); + if(bodylimit<=0) + { + fprintf(stderr, "Warning: body_length value" + "is invalid, ignored\n"); + bodylimit=0; + } + + /* parse units */ + switch(conf[11].str[strlen(conf[11].str)-1]) + { + default: + /* nothing, use bytes */ + break; + case 'k': + case 'K': + bodylimit*=1024; + break; + case 'm': + case 'M': + bodylimit*=1024*1024; + break; + } + } + + if(conf[12].str) + pidfile=conf[12].str; + + if(conf[13].str) + subj_tag=conf[13].str; + + if(conf[14].str) + forward_spam=conf[14].str; + + if(conf[15].str) + quarantine_mdir=conf[15].str; + + if(conf[16].bool!=-1) + spamicity=conf[16].bool; + } + else + return 1; /* error reading configuration */ + + if(access(pidfile, F_OK)!=-1) + { + fprintf(stderr, "pidfile '%s' exists, delete it if" + " the milter is not already running\n", pidfile); + return 1; + } + + if(!strncmp(conn, "unix:", 5)) + pipe=conn+5; + else + if(!strncmp(conn, "local:", 6)) + pipe=conn+6; + + if(pipe) + unlink(pipe); + + /* if we're root, drop privileges */ + if(!getuid()) + { + /* ugly (and portable) setproctitle */ + if(argc>1) + argv[1]=NULL; + + pw=getpwnam(user); + if(!pw) + { + fprintf(stderr, "getpwnam %s failed: %s\n", user, + strerror(errno)); + return 1; + } + if(setegid(pw->pw_gid) || setgid(pw->pw_gid)) + { + fprintf(stderr, "setgid failed: %s\n", strerror(errno)); + return 1; + } + if(setuid(pw->pw_uid) || seteuid(pw->pw_uid)) + { + fprintf(stderr, "setuid failed: %s\n", strerror(errno)); + return 1; + } + } + + if(daemon(0, 0)) + { + fprintf(stderr, "daemon failed: %s\n", strerror(errno)); + unlink(pidfile); + return 1; + } + + /* setup time to timezone */ + tzset(); + + openlog("bogom", LOG_PID | LOG_NDELAY, LOG_DAEMON); + + pidfile_fd=fopen(pidfile, "w"); + if(!pidfile_fd) + { + syslog(LOG_ERR, "unable to open pidfile '%s': %s\n", + pidfile, strerror(errno)); + return 1; + } + + if(fprintf(pidfile_fd, "%li\n", (long)getpid())<=0 || + fclose(pidfile_fd)!=0) + { + syslog(LOG_ERR, "unable to write into pidfile '%s': %s\n", + pidfile, strerror(errno)); + unlink(pidfile); + return 1; + } + + if(smfi_setconn((char *)conn)==MI_FAILURE) + { + syslog(LOG_ERR, "smfi_setconn %s failed\n", conn); + return 1; + } + + if(smfi_register(smfilter)!=MI_SUCCESS) + { + syslog(LOG_ERR, "smfi_register failed\n"); + return 1; + } + + syslog(LOG_INFO, "started %s", rcsid); + + if(quarantine_mdir) + { + if(quarantine_mdir[strlen(quarantine_mdir)]=='/') + quarantine_mdir[strlen(quarantine_mdir)]=0; + + if(quarantine_mdir[0]!='/') + { + syslog(LOG_ERR, "quarantine_mdir path must be" + " absolute"); + return 1; + } + + if(chdir(quarantine_mdir)==-1) + { + syslog(LOG_ERR, "failed to chdir to quarantine_mdir: " + "%s", strerror(errno)); + return 1; + } + + if(stat("tmp/", &st)==-1 && errno==ENOENT) + { + if(mkdir("tmp", 0700)==-1) + { + syslog(LOG_ERR, "quarantine_mdir failed to " + "create tmp/: %s", strerror(errno)); + return 1; + } + } + + } + + if(quarantine_mdir && bodylimit) + { + syslog(LOG_ERR, "body_limit is incompatible with " + "quarantine_mdir and will be ignored"); + + bodylimit=0; + } + + result=smfi_main(); + + unlink(pidfile); + + return result; +} + +/* EOF */ + -- cgit v1.2.3