Adding upstream version 3.4.23.upstream/3.4.23upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 220 insertions, 0 deletions

diff --git a/src/bounce/bounce_trace_service.c b/src/bounce/bounce_trace_service.c
new file mode 100644
index 0000000..8a62305
--- /dev/null
+++ b/src/bounce/bounce_trace_service.c
@@ -0,0 +1,220 @@
+/*++
+/* NAME
+/*	bounce_trace_service 3
+/* SUMMARY
+/*	send status report to sender, server side
+/* SYNOPSIS
+/*	#include "bounce_service.h"
+/*
+/*	int     bounce_trace_service(flags, service, queue_name, queue_id,
+/*					encoding, smtputf8, sender, envid,
+/*					ret, templates)
+/*	int	flags;
+/*	char	*service;
+/*	char	*queue_name;
+/*	char	*queue_id;
+/*	char	*encoding;
+/*	int	smtputf8;
+/*	char	*sender;
+/*	char	*envid;
+/*	int	ret;
+/*	BOUNCE_TEMPLATES *templates;
+/* DESCRIPTION
+/*	This module implements the server side of the trace_flush()
+/*	(send delivery notice) request. The logfile
+/*	is removed after the notice is posted.
+/*
+/*	A status report includes a prelude with human-readable text,
+/*	a DSN-style report, and the email message that was subject of
+/*	the status report.
+/*
+/*	When a status report is sent, the sender address is the empty
+/*	address.
+/* DIAGNOSTICS
+/*	Fatal error: error opening existing file.
+/* BUGS
+/* SEE ALSO
+/*	bounce(3) basic bounce service client interface
+/* 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 <fcntl.h>
+#include <errno.h>
+#include <string.h>
+#include <ctype.h>
+
+/* Utility library. */
+
+#include <msg.h>
+#include <vstream.h>
+#include <stringops.h>
+
+/* Global library. */
+
+#include <mail_params.h>
+#include <mail_queue.h>
+#include <post_mail.h>
+#include <mail_addr.h>
+#include <mail_error.h>
+#include <dsn_mask.h>
+#include <rec_type.h>
+#include <deliver_request.h>		/* USR_VRFY and RECORD flags */
+
+/* Application-specific. */
+
+#include "bounce_service.h"
+
+#define STR vstring_str
+
+/* bounce_trace_service - send a delivery status notice */
+
+int     bounce_trace_service(int flags, char *service, char *queue_name,
+			             char *queue_id, char *encoding,
+			             int smtputf8,
+			             char *recipient, char *dsn_envid,
+			             int unused_dsn_ret,
+			             BOUNCE_TEMPLATES *ts)
+{
+    BOUNCE_INFO *bounce_info;
+    int     bounce_status = 1;
+    VSTREAM *bounce;
+    int     notify_mask = name_mask(VAR_NOTIFY_CLASSES, mail_error_masks,
+				    var_notify_classes);
+    VSTRING *new_id;
+    int     count;
+    const char *sender;
+
+    /*
+     * For consistency with fail/delay notifications, send notification for a
+     * non-bounce message as a single-bounce message, send notification for a
+     * single-bounce message as a double-bounce message, and drop requests to
+     * send notification for a double-bounce message.
+     */
+#define NULL_SENDER		MAIL_ADDR_EMPTY	/* special address */
+
+    if (strcasecmp_utf8(recipient, mail_addr_double_bounce()) == 0) {
+	msg_info("%s: not sending trace/success notification for "
+		 "double-bounce message", queue_id);
+	return (0);
+    } else if (*recipient == 0) {
+	if ((notify_mask & MAIL_ERROR_2BOUNCE) != 0) {
+	    recipient = var_2bounce_rcpt;
+	    sender = mail_addr_double_bounce();
+	} else {
+	    msg_info("%s: not sending trace/success notification "
+		     "for single-bounce message", queue_id);
+	    if (mail_queue_remove(service, queue_id) && errno != ENOENT)
+		msg_fatal("remove %s %s: %m", service, queue_id);
+	    return (0);
+	}
+    } else {
+	/* Always send notification for non-bounce message. */
+	sender = NULL_SENDER;
+    }
+
+    /*
+     * Initialize. Open queue file, bounce log, etc.
+     * 
+     * XXX DSN The trace service produces information from the trace logfile
+     * which is used for three types of reports:
+     * 
+     * a) "what-if" reports that show what would happen without actually
+     * delivering mail (sendmail -bv).
+     * 
+     * b) A report of actual deliveries (sendmail -v).
+     * 
+     * c) DSN NOTIFY=SUCCESS reports of successful delivery ("delivered",
+     * "expanded" or "relayed").
+     */
+#define NON_DSN_FLAGS (DEL_REQ_FLAG_USR_VRFY | DEL_REQ_FLAG_RECORD)
+
+    bounce_info = bounce_mail_init(service, queue_name, queue_id,
+				   encoding, smtputf8, dsn_envid,
+				   flags & NON_DSN_FLAGS ?
+				   ts->verify : ts->success);
+
+    /*
+     * XXX With multi-recipient mail some queue file recipients may have
+     * NOTIFY=SUCCESS and others not. Depending on what subset of recipients
+     * are delivered, a trace file may or may not be created. Even when the
+     * last partial delivery attempt had no NOTIFY=SUCCESS recipients, a
+     * trace file may still exist from a previous partial delivery attempt.
+     * So as long as any recipient in the original queue file had
+     * NOTIFY=SUCCESS we have to always look for the trace file and be
+     * prepared for the file not to exist.
+     * 
+     * See also comments in qmgr/qmgr_active.c.
+     */
+    if (bounce_info->log_handle == 0) {
+	if (msg_verbose)
+	    msg_info("%s: no trace file -- not sending a notification",
+		     queue_id);
+	bounce_mail_free(bounce_info);
+	return (0);
+    }
+#define NULL_TRACE_FLAGS	0
+
+    /*
+     * Send a single bounce with a template message header, some boilerplate
+     * text that pretends that we are a polite mail system, the text with
+     * per-recipient status, and a copy of the original message.
+     * 
+     * XXX DSN We use the same trace file for "what-if", "verbose delivery" and
+     * "success" delivery reports. This saves file system overhead because
+     * there are fewer potential left-over files to remove up when we create
+     * a new queue file.
+     */
+    new_id = vstring_alloc(10);
+    if ((bounce = post_mail_fopen_nowait(sender, recipient,
+					 MAIL_SRC_MASK_BOUNCE,
+					 NULL_TRACE_FLAGS,
+					 smtputf8,
+					 new_id)) != 0) {
+	count = -1;
+	if (bounce_header(bounce, bounce_info, recipient,
+			  NO_POSTMASTER_COPY) == 0
+	    && bounce_boilerplate(bounce, bounce_info) == 0
+	    && (count = bounce_diagnostic_log(bounce, bounce_info,
+					      DSN_NOTIFY_OVERRIDE)) > 0
+	    && bounce_header_dsn(bounce, bounce_info) == 0
+	    && bounce_diagnostic_dsn(bounce, bounce_info,
+				     DSN_NOTIFY_OVERRIDE) > 0) {
+	    bounce_original(bounce, bounce_info, DSN_RET_HDRS);
+	    bounce_status = post_mail_fclose(bounce);
+	    if (bounce_status == 0)
+		msg_info("%s: sender delivery status notification: %s",
+			 queue_id, STR(new_id));
+	} else {
+	    (void) vstream_fclose(bounce);
+	    if (count == 0)
+		bounce_status = 0;
+	}
+    }
+
+    /*
+     * Examine the completion status. Delete the trace log file only when the
+     * status notice was posted successfully.
+     */
+    if (bounce_status == 0 && mail_queue_remove(service, queue_id)
+	&& errno != ENOENT)
+	msg_fatal("remove %s %s: %m", service, queue_id);
+
+    /*
+     * Cleanup.
+     */
+    bounce_mail_free(bounce_info);
+    vstring_free(new_id);
+
+    return (bounce_status);
+}