miltermodule.c

/* Copyright (C) 2001  James Niemira (niemira@colltech.com, urmane@urmane.org)
 * Portions Copyright (C) 2001,2002,2003,2004,2005,2006,2007
 *   Stuart Gathman (stuart@gathman.org)
 *
 * 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 2 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * milterContext object and thread interface contributed by
 * 	Stuart D. Gathman <stuart@bmsi.com>
 */

/* This is a Python extension to use Sendmail's libmilter functionality.  
   It is built using distutils.  To install it:

# python setup.py install 

   For additional options:

$ python setup.py help
  
   You may need to add additional libraries to setup.py.  For instance,
   Solaris2.6 requires 

     libraries=["milter","smutil","resolv"]

 */

#ifndef MAX_ML_REPLY
#define MAX_ML_REPLY 32
#endif
#if MAX_ML_REPLY != 1 && MAX_ML_REPLY != 32 && MAX_ML_REPLY != 11
#error MAX_ML_REPLY must be 1 or 11 or 32
#endif
#define _FFR_MULTILINE (MAX_ML_REPLY > 1)

//#include <pthread.h>	// shouldn't be needed - use Python API
#include <Python.h>		// Python C API
#include <libmilter/mfapi.h>	// libmilter API
#include <netinet/in.h>		// socket API


/* See if we have IPv4 and/or IPv6 support in this OS and in
 * libmilter.  We need to make several macro tests because some OS's
 * may define some if IPv6 is only partially supported, and we may
 * have a sendmail without IPv4 (compiled for IPv6-only).
 */
#ifdef SMFIA_INET
#ifdef AF_INET
#define HAVE_IPV4_SUPPORT /* use this for #ifdef's later on */
#endif
#endif

#ifdef SMFIA_INET6
#ifdef AF_INET6
#ifdef IN6ADDR_ANY_INIT
#ifdef INET6_ADDRSTRLEN
#define HAVE_IPV6_SUPPORT /* use this for #ifdef's later on */
/* Now see if it supports the RFC-2553 socket's API spec.  Early
 * IPv6 "prototype" implementations existed before the RFC was