Adding upstream version 3.7.10.upstream/3.7.10

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

1 files changed, 247 insertions, 0 deletions

diff --git a/src/global/deliver_pass.c b/src/global/deliver_pass.c
new file mode 100644
index 0000000..231b070
--- /dev/null
+++ b/src/global/deliver_pass.c
@@ -0,0 +1,247 @@
+/*++
+/* NAME
+/*	deliver_pass 3
+/* SUMMARY
+/*	deliver request pass_through
+/* SYNOPSIS
+/*	#include <deliver_request.h>
+/*
+/*	int	deliver_pass(class, service, request, recipient)
+/*	const char *class;
+/*	const char *service;
+/*	DELIVER_REQUEST *request;
+/*	RECIPIENT *recipient;
+/*
+/*	int	deliver_pass_all(class, service, request)
+/*	const char *class;
+/*	const char *service;
+/*	DELIVER_REQUEST *request;
+/* DESCRIPTION
+/*	This module implements the client side of the `queue manager
+/*	to delivery agent' protocol, passing one recipient on from
+/*	one delivery agent to another.
+/*
+/*	deliver_pass() delegates delivery of the named recipient.
+/*
+/*	deliver_pass_all() delegates an entire delivery request.
+/*
+/*	Arguments:
+/* .IP class
+/*	Destination delivery agent service class
+/* .IP service
+/*	String of the form \fItransport\fR:\fInexthop\fR. Either transport
+/*	or nexthop are optional. For details see the transport map manual page.
+/* .IP request
+/*	Delivery request with queue file information.
+/* .IP recipient
+/*	Recipient information. See recipient_list(3).
+/* DIAGNOSTICS
+/* LICENSE
+/* .ad
+/* .fi
+/*	The Secure Mailer license must be distributed with this software.
+/* BUGS
+/*	One recipient at a time; this is OK for mailbox deliveries.
+/*
+/*	Hop status information cannot be passed back.
+/* AUTHOR(S)
+/*	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>
+
+/* Utility library. */
+
+#include <msg.h>
+#include <vstring.h>
+#include <vstream.h>
+#include <split_at.h>
+#include <mymalloc.h>
+
+/* Global library. */
+
+#include <mail_params.h>
+#include <deliver_pass.h>
+#include <dsb_scan.h>
+#include <defer.h>
+#include <rcpt_print.h>
+#include <info_log_addr_form.h>
+
+#define DELIVER_PASS_DEFER	1
+#define DELIVER_PASS_UNKNOWN	2
+
+/* deliver_pass_initial_reply - retrieve initial delivery process response */
+
+static int deliver_pass_initial_reply(VSTREAM *stream)
+{
+    if (attr_scan(stream, ATTR_FLAG_STRICT,
+		  RECV_ATTR_STREQ(MAIL_ATTR_PROTO, MAIL_ATTR_PROTO_DELIVER),
+		  ATTR_TYPE_END) != 0) {
+	msg_warn("%s: malformed response", VSTREAM_PATH(stream));
+	return (-1);
+    }
+    return (0);
+}
+
+/* deliver_pass_send_request - send delivery request to delivery process */
+
+static int deliver_pass_send_request(VSTREAM *stream, DELIVER_REQUEST *request,
+				             const char *nexthop,
+				             RECIPIENT *rcpt)
+{
+    int     stat;
+
+    attr_print(stream, ATTR_FLAG_NONE,
+	       SEND_ATTR_INT(MAIL_ATTR_FLAGS, request->flags),
+	       SEND_ATTR_STR(MAIL_ATTR_QUEUE, request->queue_name),
+	       SEND_ATTR_STR(MAIL_ATTR_QUEUEID, request->queue_id),
+	       SEND_ATTR_LONG(MAIL_ATTR_OFFSET, request->data_offset),
+	       SEND_ATTR_LONG(MAIL_ATTR_SIZE, request->data_size),
+	       SEND_ATTR_STR(MAIL_ATTR_NEXTHOP, nexthop),
+	       SEND_ATTR_STR(MAIL_ATTR_ENCODING, request->encoding),
+	       SEND_ATTR_INT(MAIL_ATTR_SMTPUTF8, request->smtputf8),
+	       SEND_ATTR_STR(MAIL_ATTR_SENDER, request->sender),
+	       SEND_ATTR_STR(MAIL_ATTR_DSN_ENVID, request->dsn_envid),
+	       SEND_ATTR_INT(MAIL_ATTR_DSN_RET, request->dsn_ret),
+	SEND_ATTR_FUNC(msg_stats_print, (const void *) &request->msg_stats),
+    /* XXX Should be encapsulated with ATTR_TYPE_FUNC. */
+	     SEND_ATTR_STR(MAIL_ATTR_LOG_CLIENT_NAME, request->client_name),
+	     SEND_ATTR_STR(MAIL_ATTR_LOG_CLIENT_ADDR, request->client_addr),
+	     SEND_ATTR_STR(MAIL_ATTR_LOG_CLIENT_PORT, request->client_port),
+	     SEND_ATTR_STR(MAIL_ATTR_LOG_PROTO_NAME, request->client_proto),
+	       SEND_ATTR_STR(MAIL_ATTR_LOG_HELO_NAME, request->client_helo),
+    /* XXX Should be encapsulated with ATTR_TYPE_FUNC. */
+	       SEND_ATTR_STR(MAIL_ATTR_SASL_METHOD, request->sasl_method),
+	     SEND_ATTR_STR(MAIL_ATTR_SASL_USERNAME, request->sasl_username),
+	       SEND_ATTR_STR(MAIL_ATTR_SASL_SENDER, request->sasl_sender),
+    /* XXX Ditto if we want to pass TLS certificate info. */
+	       SEND_ATTR_STR(MAIL_ATTR_LOG_IDENT, request->log_ident),
+	     SEND_ATTR_STR(MAIL_ATTR_RWR_CONTEXT, request->rewrite_context),
+	       SEND_ATTR_INT(MAIL_ATTR_RCPT_COUNT, 1),
+	       ATTR_TYPE_END);
+    attr_print(stream, ATTR_FLAG_NONE,
+	       SEND_ATTR_FUNC(rcpt_print, (const void *) rcpt),
+	       ATTR_TYPE_END);
+
+    if (vstream_fflush(stream)) {
+	msg_warn("%s: bad write: %m", VSTREAM_PATH(stream));
+	stat = -1;
+    } else {
+	stat = 0;
+    }
+    return (stat);
+}
+
+/* deliver_pass_final_reply - retrieve final delivery status response */
+
+static int deliver_pass_final_reply(VSTREAM *stream, DSN_BUF *dsb)
+{
+    int     stat;
+
+    if (attr_scan(stream, ATTR_FLAG_STRICT,
+		  RECV_ATTR_FUNC(dsb_scan, (void *) dsb),
+		  RECV_ATTR_INT(MAIL_ATTR_STATUS, &stat),
+		  ATTR_TYPE_END) != 2) {
+	msg_warn("%s: malformed response", VSTREAM_PATH(stream));
+	return (DELIVER_PASS_UNKNOWN);
+    } else {
+	return (stat ? DELIVER_PASS_DEFER : 0);
+    }
+}
+
+/* deliver_pass - deliver one per-site queue entry */
+
+int     deliver_pass(const char *class, const char *service,
+		             DELIVER_REQUEST *request,
+		             RECIPIENT *rcpt)
+{
+    VSTREAM *stream;
+    DSN_BUF *dsb;
+    DSN     dsn;
+    int     status;
+    char   *saved_service;
+    char   *transport;
+    char   *nexthop;
+
+    /*
+     * Parse service into transport:nexthop form, and allow for omission of
+     * optional fields
+     */
+    transport = saved_service = mystrdup(service);
+    if ((nexthop = split_at(saved_service, ':')) == 0 || *nexthop == 0)
+	nexthop = request->nexthop;
+    if (*transport == 0)
+	msg_fatal("missing transport name in \"%s\"", service);
+
+    /*
+     * Initialize.
+     */
+    msg_info("%s: passing <%s> to transport=%s",
+	     request->queue_id, info_log_addr_form_recipient(rcpt->address),
+	     transport);
+    stream = mail_connect_wait(class, transport);
+    dsb = dsb_create();
+
+    /*
+     * Get the delivery process initial response. Send the queue file info
+     * and recipient info to the delivery process. Retrieve the delivery
+     * agent status report. The numerical status code indicates if delivery
+     * should be tried again. The reason text is sent only when a destination
+     * should be avoided for a while, so that the queue manager can log why
+     * it does not even try to schedule delivery to the affected recipients.
+     * XXX Can't pass back hop status info because the problem is with a
+     * different transport.
+     */
+    if (deliver_pass_initial_reply(stream) != 0
+	|| deliver_pass_send_request(stream, request, nexthop, rcpt) != 0) {
+	(void) DSN_SIMPLE(&dsn, "4.3.0", "mail transport unavailable");
+	status = defer_append(DEL_REQ_TRACE_FLAGS(request->flags),
+			      request->queue_id, &request->msg_stats,
+			      rcpt, "none", &dsn);
+    } else if ((status = deliver_pass_final_reply(stream, dsb))
+	       == DELIVER_PASS_UNKNOWN) {
+	(void) DSN_SIMPLE(&dsn, "4.3.0", "unknown mail transport error");
+	status = defer_append(DEL_REQ_TRACE_FLAGS(request->flags),
+			      request->queue_id, &request->msg_stats,
+			      rcpt, "none", &dsn);
+    }
+
+    /*
+     * Clean up.
+     */
+    vstream_fclose(stream);
+    dsb_free(dsb);
+    myfree(saved_service);
+
+    return (status);
+}
+
+/* deliver_pass_all - pass entire delivery request */
+
+int     deliver_pass_all(const char *class, const char *service,
+			         DELIVER_REQUEST *request)
+{
+    RECIPIENT_LIST *list;
+    RECIPIENT *rcpt;
+    int     status = 0;
+
+    /*
+     * XXX We should find out if the target transport can handle
+     * multi-recipient requests. Unfortunately such code is hard to test,
+     * rarely used, and therefore will be buggy.
+     */
+    list = &request->rcpt_list;
+    for (rcpt = list->info; rcpt < list->info + list->len; rcpt++)
+	status |= deliver_pass(class, service, request, rcpt);
+    return (status);
+}