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Diffstat (limited to 'src/qmgr/qmgr_defer.c')
| -rw-r--r-- | src/qmgr/qmgr_defer.c | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/src/qmgr/qmgr_defer.c b/src/qmgr/qmgr_defer.c new file mode 100644 index 0000000..79615cc --- /dev/null +++ b/src/qmgr/qmgr_defer.c @@ -0,0 +1,163 @@ +/*++ +/* 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); +} |