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/*++
/* NAME
/* verp_sender 3
/* SUMMARY
/* quote local part of mailbox
/* SYNOPSIS
/* #include <verp_sender.h>
/*
/* VSTRING *verp_sender(dst, delims, sender, recipient)
/* VSTRING *dst;
/* const char *delims;
/* const char *sender;
/* const RECIPIENT *recipient;
/*
/* const char *verp_delims_verify(delims)
/* const char *delims;
/* DESCRIPTION
/* verp_sender() encodes the recipient address in the sender
/* address, using the specified delimiters. For example,
/* with delims +=, sender \fIprefix@origin\fR, and
/* recipient \fIuser@domain\fR the result is
/* \fIprefix+user=domain@origin\fR.
/*
/* verp_delims_verify() determines if the specified VERP delimiters
/* have reasonable values. What is reasonable is configured with
/* the verp_delimiter_filter configuration parameter. The result
/* is null in case of success, a description of the problem in
/* case of error.
/*
/* Arguments:
/* .IP dst
/* The result. The buffer is null terminated.
/* .IP delims
/* VERP formatting characters.
/* .IP sender
/* Sender envelope address.
/* .IP recipient
/* Recipient envelope address.
/* LICENSE
/* .ad
/* .fi
/* The Secure Mailer license must be distributed with this software.
/* AUTHOR(S)
/* Wietse Venema
/* IBM T.J. Watson Research
/* P.O. Box 704
/* Yorktown Heights, NY 10598, USA
/*--*/
/* System library. */
#include <sys_defs.h>
#include <string.h>
/* Utility library. */
#include <vstring.h>
/* Global library. */
#include <mail_params.h>
#include <recipient_list.h>
#include <verp_sender.h>
/* verp_sender - encode recipient into envelope sender address */
VSTRING *verp_sender(VSTRING *buf, const char *delimiters,
const char *sender, const RECIPIENT *rcpt_info)
{
ssize_t send_local_len;
ssize_t rcpt_local_len;
const char *recipient;
const char *cp;
/*
* Change prefix@origin into prefix+user=domain@origin.
*
* Fix 20090115: Use the Postfix original recipient, because that is what
* the VERP consumer expects.
*/
send_local_len = ((cp = strrchr(sender, '@')) != 0 ?
cp - sender : strlen(sender));
recipient = (rcpt_info->orig_addr[0] ?
rcpt_info->orig_addr : rcpt_info->address);
rcpt_local_len = ((cp = strrchr(recipient, '@')) != 0 ?
cp - recipient : strlen(recipient));
vstring_strncpy(buf, sender, send_local_len);
VSTRING_ADDCH(buf, delimiters[0] & 0xff);
vstring_strncat(buf, recipient, rcpt_local_len);
if (recipient[rcpt_local_len] && recipient[rcpt_local_len + 1]) {
VSTRING_ADDCH(buf, delimiters[1] & 0xff);
vstring_strcat(buf, recipient + rcpt_local_len + 1);
}
if (sender[send_local_len] && sender[send_local_len + 1]) {
VSTRING_ADDCH(buf, '@');
vstring_strcat(buf, sender + send_local_len + 1);
}
VSTRING_TERMINATE(buf);
return (buf);
}
/* verp_delims_verify - sanitize VERP delimiters */
const char *verp_delims_verify(const char *delims)
{
if (strlen(delims) != 2)
return ("bad VERP delimiter character count");
if (strchr(var_verp_filter, delims[0]) == 0)
return ("bad first VERP delimiter character");
if (strchr(var_verp_filter, delims[1]) == 0)
return ("bad second VERP delimiter character");
return (0);
}
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