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-rw-r--r--src/qmgr/qmgr_defer.c163
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diff --git a/src/qmgr/qmgr_defer.c b/src/qmgr/qmgr_defer.c
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+/*++
+/* NAME
+/* qmgr_defer
+/* SUMMARY
+/* deal with mail that must be delivered later
+/* SYNOPSIS
+/* #include "qmgr.h"
+/*
+/* void qmgr_defer_recipient(message, recipient, dsn)
+/* QMGR_MESSAGE *message;
+/* RECIPIENT *recipient;
+/* DSN *dsn;
+/*
+/* void qmgr_defer_todo(queue, dsn)
+/* QMGR_QUEUE *queue;
+/* DSN *dsn;
+/*
+/* void qmgr_defer_transport(transport, dsn)
+/* QMGR_TRANSPORT *transport;
+/* DSN *dsn;
+/* DESCRIPTION
+/* qmgr_defer_recipient() defers delivery of the named message to
+/* the named recipient. It updates the message structure and writes
+/* a log entry.
+/*
+/* qmgr_defer_todo() iterates over all "todo" deliveries queued for
+/* the named site, and calls qmgr_defer_recipient() for each recipient
+/* found. Side effects caused by qmgr_entry_done(), qmgr_queue_done(),
+/* and by qmgr_active_done(): in-core queue entries will disappear,
+/* in-core queues may disappear, in-core and on-disk messages may
+/* disappear, bounces may be sent, new in-core queues, queue entries
+/* and recipients may appear.
+/*
+/* qmgr_defer_transport() calls qmgr_defer_todo() for each queue
+/* that depends on the named transport. See there for side effects.
+/*
+/* Arguments:
+/* .IP recipient
+/* A recipient address; used for logging purposes, and for updating
+/* the message-specific \fIdefer\fR log.
+/* .IP queue
+/* Specifies a queue with delivery requests for a specific next-hop
+/* host (or local user).
+/* .IP transport
+/* Specifies a message delivery transport.
+/* .IP dsn
+/* See dsn(3).
+/* BUGS
+/* The side effects of calling this routine are quite dramatic.
+/* DIAGNOSTICS
+/* Panic: consistency check failure. Fatal: out of memory.
+/* 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
+/*
+/* Preemptive scheduler enhancements:
+/* Patrik Rak
+/* Modra 6
+/* 155 00, Prague, Czech Republic
+/*--*/
+
+/* System library. */
+
+#include <sys_defs.h>
+
+/* Utility library. */
+
+#include <msg.h>
+#include <vstream.h>
+
+/* Global library. */
+
+#include <mail_proto.h>
+#include <defer.h>
+
+/* Application-specific. */
+
+#include "qmgr.h"
+
+/* qmgr_defer_transport - defer todo entries for named transport */
+
+void qmgr_defer_transport(QMGR_TRANSPORT *transport, DSN *dsn)
+{
+ QMGR_QUEUE *queue;
+ QMGR_QUEUE *next;
+
+ if (msg_verbose)
+ msg_info("defer transport %s: %s %s",
+ transport->name, dsn->status, dsn->reason);
+
+ /*
+ * Proceed carefully. Queues may disappear as a side effect.
+ */
+ for (queue = transport->queue_list.next; queue; queue = next) {
+ next = queue->peers.next;
+ qmgr_defer_todo(queue, dsn);
+ }
+}
+
+/* qmgr_defer_todo - defer all todo queue entries for specific site */
+
+void qmgr_defer_todo(QMGR_QUEUE *queue, DSN *dsn)
+{
+ QMGR_ENTRY *entry;
+ QMGR_ENTRY *next;
+ QMGR_MESSAGE *message;
+ RECIPIENT *recipient;
+ int nrcpt;
+ QMGR_QUEUE *retry_queue;
+
+ /*
+ * Sanity checks.
+ */
+ if (msg_verbose)
+ msg_info("defer site %s: %s %s",
+ queue->name, dsn->status, dsn->reason);
+
+ /*
+ * See if we can redirect the deliveries to the retry(8) delivery agent,
+ * so that they can be handled asynchronously. If the retry(8) service is
+ * unavailable, use the synchronous defer(8) server. With a large todo
+ * queue, this blocks the queue manager for a significant time.
+ */
+ retry_queue = qmgr_error_queue(MAIL_SERVICE_RETRY, dsn);
+
+ /*
+ * Proceed carefully. Queue entries may disappear as a side effect.
+ */
+ for (entry = queue->todo.next; entry != 0; entry = next) {
+ next = entry->queue_peers.next;
+ if (retry_queue != 0) {
+ qmgr_entry_move_todo(retry_queue, entry);
+ continue;
+ }
+ message = entry->message;
+ for (nrcpt = 0; nrcpt < entry->rcpt_list.len; nrcpt++) {
+ recipient = entry->rcpt_list.info + nrcpt;
+ qmgr_defer_recipient(message, recipient, dsn);
+ }
+ qmgr_entry_done(entry, QMGR_QUEUE_TODO);
+ }
+}
+
+/* qmgr_defer_recipient - defer delivery of specific recipient */
+
+void qmgr_defer_recipient(QMGR_MESSAGE *message, RECIPIENT *recipient,
+ DSN *dsn)
+{
+ MSG_STATS stats;
+
+ /*
+ * Update the message structure and log the message disposition.
+ */
+ message->flags |= defer_append(message->tflags, message->queue_id,
+ QMGR_MSG_STATS(&stats, message), recipient,
+ "none", dsn);
+}