Adding upstream version 3.4.23.upstream/3.4.23upstream

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

1 files changed, 221 insertions, 0 deletions

diff --git a/src/smtp/smtp_rcpt.c b/src/smtp/smtp_rcpt.c
new file mode 100644
index 0000000..673f0b4
--- /dev/null
+++ b/src/smtp/smtp_rcpt.c
@@ -0,0 +1,221 @@
+/*++
+/* NAME
+/*	smtp_rcpt 3
+/* SUMMARY
+/*	application-specific recipient list operations
+/* SYNOPSIS
+/*	#include <smtp.h>
+/*
+/*	SMTP_RCPT_INIT(state)
+/*	SMTP_STATE *state;
+/*
+/*	SMTP_RCPT_DROP(state, rcpt)
+/*	SMTP_STATE *state;
+/*	RECIPIENT *rcpt;
+/*
+/*	SMTP_RCPT_KEEP(state, rcpt)
+/*	SMTP_STATE *state;
+/*	RECIPIENT *rcpt;
+/*
+/*	SMTP_RCPT_ISMARKED(rcpt)
+/*	RECIPIENT *rcpt;
+/*
+/*	void	smtp_rcpt_cleanup(SMTP_STATE *state)
+/*	SMTP_STATE *state;
+/*
+/*	int	SMTP_RCPT_LEFT(state)
+/*	SMTP_STATE *state;
+/*
+/*	int	SMTP_RCPT_MARK_COUNT(state)
+/*	SMTP_STATE *state;
+/*
+/*	void	smtp_rcpt_done(state, resp, rcpt)
+/*	SMTP_STATE *state;
+/*	SMTP_RESP *resp;
+/*	RECIPIENT *rcpt;
+/* DESCRIPTION
+/*	This module implements application-specific mark and sweep
+/*	operations on recipient lists. Operation is as follows:
+/* .IP \(bu
+/*	In the course of a delivery attempt each recipient is
+/*	marked either as DROP (remove from recipient list) or KEEP
+/*	(deliver to alternate mail server).
+/* .IP \(bu
+/*	After a delivery attempt any recipients marked DROP are deleted
+/*	from the request, and the left-over recipients are unmarked.
+/* .PP
+/*	The mark/sweep algorithm is implemented in a redundant manner,
+/*	and ensures that all recipients are explicitly accounted for.
+/*
+/*	Operations with upper case names are implemented by macros
+/*	whose arguments may be evaluated more than once.
+/*
+/*	SMTP_RCPT_INIT() initializes application-specific recipient
+/*	information and must be called before the first delivery attempt.
+/*
+/*	SMTP_RCPT_DROP() marks the specified recipient as DROP (remove
+/*	from recipient list). It is an error to mark an already marked
+/*	recipient.
+/*
+/*	SMTP_RCPT_KEEP() marks the specified recipient as KEEP (deliver
+/*	to alternate mail server). It is an error to mark an already
+/*	marked recipient.
+/*
+/*	SMTP_RCPT_ISMARKED() returns non-zero when the specified
+/*	recipient is marked.
+/*
+/*	SMTP_RCPT_LEFT() returns the number of left_over recipients
+/*	(the total number of marked and non-marked recipients).
+/*
+/*	SMTP_RCPT_MARK_COUNT() returns the number of left_over
+/*	recipients that are marked.
+/*
+/*	smtp_rcpt_cleanup() cleans up the in-memory recipient list.
+/*	It removes the recipients marked DROP from the left-over
+/*	recipients, unmarks the left-over recipients, and enforces
+/*	the requirement that all recipients are marked upon entry.
+/*
+/*	smtp_rcpt_done() logs that a recipient is completed and upon
+/*	success it marks the recipient as done in the queue file.
+/*	Finally, it marks the in-memory recipient as DROP.
+/*
+/*	Note: smtp_rcpt_done() may change the order of the recipient
+/*	list.
+/* DIAGNOSTICS
+/*	Panic: interface violation.
+/*
+/*	When a recipient can't be logged as completed, the recipient is
+/*	logged as deferred instead.
+/* BUGS
+/*	The single recipient list abstraction dates from the time
+/*	that the SMTP client would give up after one SMTP session,
+/*	so that each recipient was either bounced, delivered or
+/*	deferred. Implicitly, all recipients were marked as DROP.
+/*
+/*	This abstraction is less convenient when an SMTP client
+/*	must be able to deliver left-over recipients to a backup
+/*	host. It might be more natural to have an input list with
+/*	recipients to deliver, and an output list with left-over
+/*	recipients.
+/* 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 <stdlib.h>			/* smtp_rcpt_cleanup  */
+#include <string.h>
+
+/* Utility  library. */
+
+#include <msg.h>
+#include <stringops.h>
+#include <mymalloc.h>
+
+/* Global library. */
+
+#include <mail_params.h>
+#include <deliver_request.h>		/* smtp_rcpt_done */
+#include <deliver_completed.h>		/* smtp_rcpt_done */
+#include <sent.h>			/* smtp_rcpt_done */
+#include <dsn_mask.h>			/* smtp_rcpt_done */
+
+/* Application-specific. */
+
+#include <smtp.h>
+
+/* smtp_rcpt_done - mark recipient as done or else */
+
+void    smtp_rcpt_done(SMTP_STATE *state, SMTP_RESP *resp, RECIPIENT *rcpt)
+{
+    DELIVER_REQUEST *request = state->request;
+    SMTP_SESSION *session = state->session;
+    SMTP_ITERATOR *iter = state->iterator;
+    DSN_BUF *why = state->why;
+    const char *dsn_action = "relayed";
+    int     status;
+
+    /*
+     * Assume this was intermediate delivery when the server announced DSN
+     * support, and don't send a DSN "SUCCESS" notification.
+     */
+    if (session->features & SMTP_FEATURE_DSN)
+	rcpt->dsn_notify &= ~DSN_NOTIFY_SUCCESS;
+
+    /*
+     * Assume this was final delivery when the LMTP server announced no DSN
+     * support. In backwards compatibility mode, send a "relayed" instead of
+     * a "delivered" DSN "SUCCESS" notification. Do not attempt to "simplify"
+     * the expression. The redundancy is for clarity. It is trivially
+     * eliminated by the compiler. There is no need to sacrifice clarity for
+     * the sake of "performance".
+     */
+    if ((session->features & SMTP_FEATURE_DSN) == 0
+	&& !smtp_mode
+	&& var_lmtp_assume_final != 0)
+	dsn_action = "delivered";
+
+    /*
+     * Report success and delete the recipient from the delivery request.
+     * Defer if the success can't be reported.
+     * 
+     * Note: the DSN action is ignored in case of address probes.
+     */
+    dsb_update(why, resp->dsn, dsn_action, DSB_MTYPE_DNS, STR(iter->host),
+	       DSB_DTYPE_SMTP, resp->str, "%s", resp->str);
+
+    status = sent(DEL_REQ_TRACE_FLAGS(request->flags),
+		  request->queue_id, &request->msg_stats, rcpt,
+		  session->namaddrport, DSN_FROM_DSN_BUF(why));
+    if (status == 0)
+	if (request->flags & DEL_REQ_FLAG_SUCCESS)
+	    deliver_completed(state->src, rcpt->offset);
+    SMTP_RCPT_DROP(state, rcpt);
+    state->status |= status;
+}
+
+/* smtp_rcpt_cleanup_callback - qsort callback */
+
+static int smtp_rcpt_cleanup_callback(const void *a, const void *b)
+{
+    return (((RECIPIENT *) a)->u.status - ((RECIPIENT *) b)->u.status);
+}
+
+/* smtp_rcpt_cleanup - purge completed recipients from request */
+
+void    smtp_rcpt_cleanup(SMTP_STATE *state)
+{
+    RECIPIENT_LIST *rcpt_list = &state->request->rcpt_list;
+    RECIPIENT *rcpt;
+
+    /*
+     * Sanity checks.
+     */
+    if (state->rcpt_drop + state->rcpt_keep != state->rcpt_left)
+	msg_panic("smtp_rcpt_cleanup: recipient count mismatch: %d+%d!=%d",
+		  state->rcpt_drop, state->rcpt_keep, state->rcpt_left);
+
+    /*
+     * Recipients marked KEEP sort before recipients marked DROP. Skip the
+     * sorting in the common case that all recipients are marked the same.
+     */
+    if (state->rcpt_drop > 0 && state->rcpt_keep > 0)
+	qsort((void *) rcpt_list->info, state->rcpt_left,
+	      sizeof(rcpt_list->info[0]), smtp_rcpt_cleanup_callback);
+
+    /*
+     * Truncate the recipient list and unmark the left-over recipients.
+     */
+    state->rcpt_left = state->rcpt_keep;
+    for (rcpt = rcpt_list->info; rcpt < rcpt_list->info + state->rcpt_left; rcpt++)
+	rcpt->u.status = 0;
+    state->rcpt_drop = state->rcpt_keep = 0;
+}