File ext_log.c of Package qmail-spp-plugins

/*
 * Extended Log for qmail.  -   sromero at gmail dot com - 06-06-2007
 *
 * Extends qmail-smtpd logs including From and To fields, for easier
 * tracking of emails and spammers:
 *
 * XXXX tcpserver: ok 18742 127.0.0.1:127.0.0.1:25 localhost:127.0.0.1::34402
 * XXXX ext_log: IP <127.0.0.1> From <sromero@src.com> To <sromero@dest.com>
 * XXXX tcpserver: end 18742 status 0
 *
 *
 * Usage: 
 * Compile the plugin with "gcc -o ext_log ext_log.c"
 * Copy it to /var/qmail/plugins
 * Add this line to your /var/qmail/control/smtpplugins file:
 *
 * [rcpt]
 * plugins/ext_log
 * 
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 * (Based in "spf.c" for qmail-spp, thanks for the source and ideas)
 */

#include <stdlib.h>
#include <stdio.h>

//---------------------------------------------------------------------------
int main( void )
{
	char *me, *remote, *helo, *sender, *recipient, *spf_env, *header;

// Get environment variables provided by qmail-spp
	remote  = getenv("TCPREMOTEIP"); 
	me      = getenv("TCPLOCALHOST");
	if (!me) me = getenv("TCPLOCALIP");
	if (!remote || !me) 
   {
		fprintf(stderr, "ext_log: ERROR: can't get tcpserver variables.\n");
		if(!remote) fprintf(stderr, "ext_log: can't read TCPREMOTEIP.\n");
		else fprintf(stderr, "ext_log: can't read TCPLOCALHOST nor TCPLOCALIP.\n");
		return 0;
	}

sender = getenv("SMTPMAILFROM");
	if (!sender) 
   {
		fprintf(stderr, "ext_log: ERROR: can't get envelope sender address.\n");
		fprintf(stderr, "ext_log: can't read SMTPMAILFROM.\n");
		return 0;
	}
	if (!*sender) return 0;

recipient = getenv("SMTPRCPTTO");
	if (!recipient) 
   {
		fprintf(stderr, "ext_log: ERROR: can't get destination address.\n");
		fprintf(stderr, "ext_log: can't read SMTPRCPTTO.\n");
		return 0;
	}

// print data to stderr (qmail-smtpd log)  
   fprintf(stderr, "ext_log: IP <%s> From <%s> To <%s>\n", remote, sender, recipient );
	return 0;
}