Adding upstream version 3.4.23.upstream/3.4.23upstream

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

1 files changed, 253 insertions, 0 deletions

diff --git a/src/discard/discard.c b/src/discard/discard.c
new file mode 100644
index 0000000..331f96f
--- /dev/null
+++ b/src/discard/discard.c
@@ -0,0 +1,253 @@
+/*++
+/* NAME
+/*	discard 8
+/* SUMMARY
+/*	Postfix discard mail delivery agent
+/* SYNOPSIS
+/*	\fBdiscard\fR [generic Postfix daemon options]
+/* DESCRIPTION
+/*	The Postfix \fBdiscard\fR(8) delivery agent processes
+/*	delivery requests from
+/*	the queue manager. Each request specifies a queue file, a sender
+/*	address, a next-hop destination that is treated as the reason for
+/*	discarding the mail, and recipient information.
+/*	The reason may be prefixed with an RFC 3463-compatible detail code.
+/*	This program expects to be run from the \fBmaster\fR(8) process
+/*	manager.
+/*
+/*	The \fBdiscard\fR(8) delivery agent pretends to deliver all recipients
+/*	in the delivery request, logs the "next-hop" destination
+/*	as the reason for discarding the mail, updates the
+/*	queue file, and either marks recipients as finished or informs the
+/*	queue manager that delivery should be tried again at a later time.
+/*
+/*	Delivery status reports are sent to the \fBtrace\fR(8)
+/*	daemon as appropriate.
+/* SECURITY
+/* .ad
+/* .fi
+/*	The \fBdiscard\fR(8) mailer is not security-sensitive. It does not talk
+/*	to the network, and can be run chrooted at fixed low privilege.
+/* STANDARDS
+/*	RFC 3463 (Enhanced Status Codes)
+/* DIAGNOSTICS
+/*	Problems and transactions are logged to \fBsyslogd\fR(8)
+/*	or \fBpostlogd\fR(8).
+/*
+/*	Depending on the setting of the \fBnotify_classes\fR parameter,
+/*	the postmaster is notified of bounces and of other trouble.
+/* CONFIGURATION PARAMETERS
+/* .ad
+/* .fi
+/*	Changes to \fBmain.cf\fR are picked up automatically as \fBdiscard\fR(8)
+/*	processes run for only a limited amount of time. Use the command
+/*	"\fBpostfix reload\fR" to speed up a change.
+/*
+/*	The text below provides only a parameter summary. See
+/*	\fBpostconf\fR(5) for more details including examples.
+/* .IP "\fBconfig_directory (see 'postconf -d' output)\fR"
+/*	The default location of the Postfix main.cf and master.cf
+/*	configuration files.
+/* .IP "\fBdaemon_timeout (18000s)\fR"
+/*	How much time a Postfix daemon process may take to handle a
+/*	request before it is terminated by a built-in watchdog timer.
+/* .IP "\fBdelay_logging_resolution_limit (2)\fR"
+/*	The maximal number of digits after the decimal point when logging
+/*	sub-second delay values.
+/* .IP "\fBdouble_bounce_sender (double-bounce)\fR"
+/*	The sender address of postmaster notifications that are generated
+/*	by the mail system.
+/* .IP "\fBipc_timeout (3600s)\fR"
+/*	The time limit for sending or receiving information over an internal
+/*	communication channel.
+/* .IP "\fBmax_idle (100s)\fR"
+/*	The maximum amount of time that an idle Postfix daemon process waits
+/*	for an incoming connection before terminating voluntarily.
+/* .IP "\fBmax_use (100)\fR"
+/*	The maximal number of incoming connections that a Postfix daemon
+/*	process will service before terminating voluntarily.
+/* .IP "\fBprocess_id (read-only)\fR"
+/*	The process ID of a Postfix command or daemon process.
+/* .IP "\fBprocess_name (read-only)\fR"
+/*	The process name of a Postfix command or daemon process.
+/* .IP "\fBqueue_directory (see 'postconf -d' output)\fR"
+/*	The location of the Postfix top-level queue directory.
+/* .IP "\fBsyslog_facility (mail)\fR"
+/*	The syslog facility of Postfix logging.
+/* .IP "\fBsyslog_name (see 'postconf -d' output)\fR"
+/*	A prefix that is prepended to the process name in syslog
+/*	records, so that, for example, "smtpd" becomes "prefix/smtpd".
+/* .PP
+/*	Available in Postfix 3.3 and later:
+/* .IP "\fBservice_name (read-only)\fR"
+/*	The master.cf service name of a Postfix daemon process.
+/* SEE ALSO
+/*	qmgr(8), queue manager
+/*	bounce(8), delivery status reports
+/*	error(8), Postfix error delivery agent
+/*	postconf(5), configuration parameters
+/*	master(5), generic daemon options
+/*	master(8), process manager
+/*	postlogd(8), Postfix logging
+/*	syslogd(8), system logging
+/* LICENSE
+/* .ad
+/* .fi
+/*	The Secure Mailer license must be distributed with this software.
+/* HISTORY
+/*	This service was introduced with Postfix version 2.2.
+/* AUTHOR(S)
+/*	Victor Duchovni
+/*	Morgan Stanley
+/*
+/*	Based on code by:
+/*	Wietse Venema
+/*	IBM T.J. Watson Research
+/*	P.O. Box 704
+/*	Yorktown Heights, NY 10598, USA
+/*
+/*	Wietse Venema
+/*	Google, Inc.
+/*	111 8th Avenue
+/*	New York, NY 10011, USA
+/*--*/
+
+/* System library. */
+
+#include <sys_defs.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+/* Utility library. */
+
+#include <msg.h>
+#include <vstream.h>
+
+/* Global library. */
+
+#include <deliver_request.h>
+#include <mail_queue.h>
+#include <bounce.h>
+#include <deliver_completed.h>
+#include <flush_clnt.h>
+#include <sent.h>
+#include <dsn_util.h>
+#include <mail_version.h>
+
+/* Single server skeleton. */
+
+#include <mail_server.h>
+
+/* deliver_message - deliver message with extreme prejudice */
+
+static int deliver_message(DELIVER_REQUEST *request)
+{
+    const char *myname = "deliver_message";
+    VSTREAM *src;
+    int     result = 0;
+    int     status;
+    RECIPIENT *rcpt;
+    int     nrcpt;
+    DSN_SPLIT dp;
+    DSN     dsn;
+
+    if (msg_verbose)
+	msg_info("deliver_message: from %s", request->sender);
+
+    /*
+     * Sanity checks.
+     */
+    if (request->nexthop[0] == 0)
+	msg_fatal("empty nexthop hostname");
+    if (request->rcpt_list.len <= 0)
+	msg_fatal("recipient count: %d", request->rcpt_list.len);
+
+    /*
+     * Open the queue file. Opening the file can fail for a variety of
+     * reasons, such as the system running out of resources. Instead of
+     * throwing away mail, we're raising a fatal error which forces the mail
+     * system to back off, and retry later.
+     */
+    src = mail_queue_open(request->queue_name, request->queue_id,
+			  O_RDWR, 0);
+    if (src == 0)
+	msg_fatal("%s: open %s %s: %m", myname,
+		  request->queue_name, request->queue_id);
+    if (msg_verbose)
+	msg_info("%s: file %s", myname, VSTREAM_PATH(src));
+
+    /*
+     * Discard all recipients.
+     */
+#define BOUNCE_FLAGS(request) DEL_REQ_TRACE_FLAGS(request->flags)
+
+    dsn_split(&dp, "2.0.0", request->nexthop);
+    (void) DSN_SIMPLE(&dsn, DSN_STATUS(dp.dsn), dp.text);
+    for (nrcpt = 0; nrcpt < request->rcpt_list.len; nrcpt++) {
+	rcpt = request->rcpt_list.info + nrcpt;
+	status = sent(BOUNCE_FLAGS(request), request->queue_id,
+		      &request->msg_stats, rcpt, "none", &dsn);
+	if (status == 0 && (request->flags & DEL_REQ_FLAG_SUCCESS))
+	    deliver_completed(src, rcpt->offset);
+	result |= status;
+    }
+
+    /*
+     * Clean up.
+     */
+    if (vstream_fclose(src))
+	msg_warn("close %s %s: %m", request->queue_name, request->queue_id);
+
+    return (result);
+}
+
+/* discard_service - perform service for client */
+
+static void discard_service(VSTREAM *client_stream, char *unused_service, char **argv)
+{
+    DELIVER_REQUEST *request;
+    int     status;
+
+    /*
+     * Sanity check. This service takes no command-line arguments.
+     */
+    if (argv[0])
+	msg_fatal("unexpected command-line argument: %s", argv[0]);
+
+    /*
+     * This routine runs whenever a client connects to the UNIX-domain socket
+     * dedicated to the discard mailer. What we see below is a little
+     * protocol to (1) tell the queue manager that we are ready, (2) read a
+     * request from the queue manager, and (3) report the completion status
+     * of that request. All connection-management stuff is handled by the
+     * common code in single_server.c.
+     */
+    if ((request = deliver_request_read(client_stream)) != 0) {
+	status = deliver_message(request);
+	deliver_request_done(client_stream, request, status);
+    }
+}
+
+/* pre_init - pre-jail initialization */
+
+static void pre_init(char *unused_name, char **unused_argv)
+{
+    flush_init();
+}
+
+MAIL_VERSION_STAMP_DECLARE;
+
+/* main - pass control to the single-threaded skeleton */
+
+int     main(int argc, char **argv)
+{
+
+    /*
+     * Fingerprint executables and core dumps.
+     */
+    MAIL_VERSION_STAMP_ALLOCATE;
+
+    single_server_main(argc, argv, discard_service,
+		       CA_MAIL_SERVER_PRE_INIT(pre_init),
+		       0);
+}