1 files changed, 94 insertions, 0 deletions
diff --git a/src/local/indirect.c b/src/local/indirect.c
new file mode 100644
index 0000000..a9699a5
--- /dev/null
+++ b/src/local/indirect.c
@@ -0,0 +1,94 @@
+/*++
+/* NAME
+/*	indirect 3
+/* SUMMARY
+/*	indirect delivery
+/* SYNOPSIS
+/*	#include "local.h"
+/*
+/*	void	deliver_indirect(state)
+/*	LOCAL_STATE state;
+/*	char	*recipient;
+/* DESCRIPTION
+/*	deliver_indirect() delivers a message via the message
+/*	forwarding service, with duplicate filtering up to a
+/*	configurable number of recipients.
+/*
+/*	Arguments:
+/* .IP state
+/*	The attributes that specify the message, sender and more.
+/*	A table with the results from expanding aliases or lists.
+/* CONFIGURATION VARIABLES
+/*	duplicate_filter_limit, duplicate filter size limit
+/* DIAGNOSTICS
+/*	The result is non-zero when the operation should be tried again.
+/* 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 <unistd.h>
+
+/* Utility library. */
+
+#include <msg.h>
+#include <htable.h>
+
+/* Global library. */
+
+#include <mail_params.h>
+#include <bounce.h>
+#include <defer.h>
+#include <been_here.h>
+#include <sent.h>
+
+/* Application-specific. */
+
+#include "local.h"
+
+/* deliver_indirect - deliver mail via forwarding service */
+
+int     deliver_indirect(LOCAL_STATE state)
+{
+
+    /*
+     * Suppress duplicate expansion results. Add some sugar to the name to
+     * avoid collisions with other duplicate filters. Allow the user to
+     * specify an upper bound on the size of the duplicate filter, so that we
+     * can handle huge mailing lists with millions of recipients.
+     */
+    if (msg_verbose)
+	msg_info("deliver_indirect: %s", state.msg_attr.rcpt.address);
+    if (been_here(state.dup_filter, "indirect %s",
+		  state.msg_attr.rcpt.address))
+	return (0);
+
+    /*
+     * Don't forward a trace-only request.
+     */
+    if (DEL_REQ_TRACE_ONLY(state.request->flags)) {
+	dsb_simple(state.msg_attr.why, "2.0.0", "forwards to %s",
+		   state.msg_attr.rcpt.address);
+	return (sent(BOUNCE_FLAGS(state.request), SENT_ATTR(state.msg_attr)));
+    }
+
+    /*
+     * Send the address to the forwarding service. Inherit the delivered
+     * attribute from the alias or from the .forward file owner.
+     */
+    if (forward_append(state.msg_attr)) {
+	dsb_simple(state.msg_attr.why, "4.3.0", "unable to forward message");
+	return (defer_append(BOUNCE_FLAGS(state.request),
+			     BOUNCE_ATTR(state.msg_attr)));
+    }
+    return (0);
+}