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/*++
/* NAME
/* bounce 3
/* SUMMARY
/* bounce service client
/* SYNOPSIS
/* #include <bounce.h>
/*
/* int bounce_append(flags, id, recipient, relay, entry, format, ...)
/* int flags;
/* const char *id;
/* const char *recipient;
/* const char *relay;
/* time_t entry;
/* const char *format;
/*
/* int vbounce_append(flags, id, recipient, relay, entry, format, ap)
/* int flags;
/* const char *id;
/* const char *recipient;
/* const char *relay;
/* time_t entry;
/* const char *format;
/* va_list ap;
/*
/* int bounce_flush(flags, queue, id, sender)
/* int flags;
/* const char *queue;
/* const char *id;
/* const char *sender;
/* DESCRIPTION
/* This module implements the client interface to the message
/* bounce service, which maintains a per-message log of status
/* records with recipients that were bounced, and the reason why.
/*
/* bounce_append() appends a reason for non-delivery to the
/* bounce log for the named recipient.
/*
/* vbounce_append() implements an alternative interface.
/*
/* bounce_flush() actually bounces the specified message to
/* the specified sender, including the bounce log that was
/* built with bounce_append().
/*
/* Arguments:
/* .IP flags
/* The bitwise OR of zero or mor of the following (specify
/* BOUNCE_FLAG_NONE to request no special processing):
/* .RS
/* .IP BOUNCE_FLAG_CLEAN
/* Delete the bounce log in case of an error (as in: pretend
/* that we never even tried to bounce this message).
/* .IP BOUNCE_FLAG_COPY
/* Request that a postmaster copy is sent (bounce_flush() only).
/* .RE
/* .IP queue
/* The message queue name of the original message file.
/* .IP id
/* The message queue id if the original message file. The bounce log
/* file has the same name as the original message file.
/* .IP sender
/* The sender envelope address.
/* .IP relay
/* Name of the host that the message could not be delivered to.
/* This information is used for syslogging only.
/* .IP entry
/* Message arrival time.
/* .IP recipient
/* Recipient address that the message could not be delivered to.
/* This information is used for syslogging only.
/* .IP format
/* The reason for non-delivery.
/* .IP ap
/* Variable-length argument list.
/* DIAGNOSTICS
/* In case of success, these functions log the action, and return a
/* zero value. Otherwise, the functions return a non-zero result,
/* and when BOUNCE_FLAG_CLEAN is disabled, log that message
/* delivery is deferred.
/* BUGS
/* Should be replaced by routines with an attribute-value based
/* interface instead of an interface that uses a rigid argument list.
/* 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 <stdlib.h> /* 44BSD stdarg.h uses abort() */
#include <time.h>
#include <stdarg.h>
/* Utility library. */
#include <msg.h>
#include <vstring.h>
/* Global library. */
#include "mail_params.h"
#include "mail_proto.h"
#include "defer.h"
#include "bounce.h"
/* bounce_append - append reason to per-message bounce log */
int bounce_append(int flags, const char *id, const char *recipient,
const char *relay, time_t entry, const char *fmt,...)
{
va_list ap;
int status;
va_start(ap, fmt);
status = vbounce_append(flags, id, recipient, relay, entry, fmt, ap);
va_end(ap);
return (status);
}
/* vbounce_append - append bounce reason to per-message log */
int vbounce_append(int flags, const char *id, const char *recipient,
const char *relay, time_t entry, const char *fmt, va_list ap)
{
VSTRING *why;
int status;
int delay;
/*
* When we're pretending that we can't bounce, don't create a defer log
* file when we wouldn't keep the bounce log file. That's a lot of
* negatives in one sentence.
*/
if (var_soft_bounce && (flags & BOUNCE_FLAG_CLEAN))
return (-1);
why = vstring_alloc(100);
delay = time((time_t *) 0) - entry;
vstring_vsprintf(why, fmt, ap);
if (mail_command_write(MAIL_CLASS_PRIVATE, var_soft_bounce ?
MAIL_SERVICE_DEFER : MAIL_SERVICE_BOUNCE,
"%d %d %s %s %s", BOUNCE_CMD_APPEND,
flags, id, recipient, vstring_str(why)) == 0) {
msg_info("%s: to=<%s>, relay=%s, delay=%d, status=%s (%s)",
id, recipient, relay, delay, var_soft_bounce ? "deferred" :
"bounced", vstring_str(why));
status = (var_soft_bounce ? -1 : 0);
} else if ((flags & BOUNCE_FLAG_CLEAN) == 0) {
status = defer_append(flags, id, recipient, "bounce", delay,
"bounce failed");
} else {
status = -1;
}
vstring_free(why);
return (status);
}
/* bounce_flush - flush the bounce log and deliver to the sender */
int bounce_flush(int flags, const char *queue, const char *id,
const char *sender)
{
/*
* When we're pretending that we can't bounce, don't send a bounce
* message.
*/
if (var_soft_bounce)
return (-1);
if (mail_command_write(MAIL_CLASS_PRIVATE, MAIL_SERVICE_BOUNCE,
"%d %d %s %s %s", BOUNCE_CMD_FLUSH,
flags, queue, id, sender) == 0) {
return (0);
} else if ((flags & BOUNCE_FLAG_CLEAN) == 0) {
msg_info("%s: status=deferred (bounce failed)", id);
return (-1);
} else {
return (-1);
}
}
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