Adding upstream version 3.4.23.upstream/3.4.23upstream

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

1 files changed, 265 insertions, 0 deletions

diff --git a/src/cleanup/cleanup_out_recipient.c b/src/cleanup/cleanup_out_recipient.c
new file mode 100644
index 0000000..40735e2
--- /dev/null
+++ b/src/cleanup/cleanup_out_recipient.c
@@ -0,0 +1,265 @@
+/*++
+/* NAME
+/*	cleanup_out_recipient 3
+/* SUMMARY
+/*	envelope recipient output filter
+/* SYNOPSIS
+/*	#include "cleanup.h"
+/*
+/*	void	cleanup_out_recipient(state, dsn_orig_recipient,
+/*					dsn_notify, orig_recipient,
+/*					recipient)
+/*	CLEANUP_STATE *state;
+/*	const char *dsn_orig_recipient;
+/*	const char *dsn_notify;
+/*	const char *orig_recipient;
+/*	const char *recipient;
+/* DESCRIPTION
+/*	This module implements an envelope recipient output filter.
+/*
+/*	cleanup_out_recipient() performs virtual table expansion
+/*	and recipient duplicate filtering, and appends the
+/*	resulting recipients to the output stream. It also
+/*	generates DSN SUCCESS notifications.
+/*
+/*	Arguments:
+/* .IP state
+/*	Cleanup server state.
+/* .IP dsn_orig_recipient
+/*	DSN original recipient information.
+/* .IP dsn_notify
+/*	DSN notify flags.
+/* .IP orig_recipient
+/*	Envelope recipient as received by Postfix.
+/* .IP recipient
+/*	Envelope recipient as rewritten by Postfix.
+/* CONFIGURATION
+/* .ad
+/* .fi
+/* .IP enable_original_recipient
+/*	Enable orig_recipient support.
+/* .IP local_duplicate_filter_limit
+/*	Upper bound to the size of the recipient duplicate filter.
+/*	Zero means no limit; this may cause the mail system to
+/*	become stuck.
+/* .IP virtual_alias_maps
+/*	list of virtual address lookup tables.
+/* 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
+/*
+/*	Wietse Venema
+/*	Google, Inc.
+/*	111 8th Avenue
+/*	New York, NY 10011, USA
+/*--*/
+
+/* System library. */
+
+#include <sys_defs.h>
+#include <string.h>
+
+/* Utility library. */
+
+#include <argv.h>
+#include <msg.h>
+
+/* Global library. */
+
+#include <been_here.h>
+#include <mail_params.h>
+#include <rec_type.h>
+#include <ext_prop.h>
+#include <cleanup_user.h>
+#include <dsn_mask.h>
+#include <recipient_list.h>
+#include <dsn.h>
+#include <trace.h>
+#include <verify.h>
+#include <mail_queue.h>			/* cleanup_trace_path */
+#include <mail_proto.h>
+#include <msg_stats.h>
+
+/* Application-specific. */
+
+#include "cleanup.h"
+
+/* cleanup_trace_append - update trace logfile */
+
+static void cleanup_trace_append(CLEANUP_STATE *state, RECIPIENT *rcpt,
+				         DSN *dsn)
+{
+    MSG_STATS stats;
+
+    if (cleanup_trace_path == 0) {
+	cleanup_trace_path = vstring_alloc(10);
+	mail_queue_path(cleanup_trace_path, MAIL_QUEUE_TRACE,
+			state->queue_id);
+    }
+    if (trace_append(BOUNCE_FLAG_CLEAN, state->queue_id,
+		     CLEANUP_MSG_STATS(&stats, state),
+		     rcpt, "none", dsn) != 0) {
+	msg_warn("%s: trace logfile update error", state->queue_id);
+	state->errs |= CLEANUP_STAT_WRITE;
+    }
+}
+
+/* cleanup_verify_append - update verify daemon */
+
+static void cleanup_verify_append(CLEANUP_STATE *state, RECIPIENT *rcpt,
+				          DSN *dsn, int verify_status)
+{
+    MSG_STATS stats;
+
+    if (verify_append(state->queue_id, CLEANUP_MSG_STATS(&stats, state),
+		      rcpt, "none", dsn, verify_status) != 0) {
+	msg_warn("%s: verify service update error", state->queue_id);
+	state->errs |= CLEANUP_STAT_WRITE;
+    }
+}
+
+/* cleanup_out_recipient - envelope recipient output filter */
+
+void    cleanup_out_recipient(CLEANUP_STATE *state,
+			              const char *dsn_orcpt,
+			              int dsn_notify,
+			              const char *orcpt,
+			              const char *recip)
+{
+    ARGV   *argv;
+    char  **cpp;
+
+    /*
+     * XXX Not elegant, but eliminates complexity in the record reading loop.
+     */
+    if (dsn_orcpt == 0)
+	dsn_orcpt = "";
+
+    /*
+     * Distinguish between different original recipient addresses that map
+     * onto the same mailbox. The recipient will use our original recipient
+     * message header to figure things out.
+     * 
+     * Postfix 2.2 compatibility: when ignoring differences in Postfix original
+     * recipient information, also ignore differences in DSN attributes. We
+     * do, however, keep the DSN attributes of the recipient that survives
+     * duplicate elimination.
+     */
+#define STREQ(x, y) (strcmp((x), (y)) == 0)
+
+    if ((state->flags & CLEANUP_FLAG_MAP_OK) == 0
+	|| cleanup_virt_alias_maps == 0) {
+	if ((var_enable_orcpt ?
+	     been_here(state->dups, "%s\n%d\n%s\n%s",
+		       dsn_orcpt, dsn_notify, orcpt, recip) :
+	     been_here_fixed(state->dups, recip)) == 0) {
+	    if (dsn_notify)
+		cleanup_out_format(state, REC_TYPE_ATTR, "%s=%d",
+				   MAIL_ATTR_DSN_NOTIFY, dsn_notify);
+	    if (*dsn_orcpt)
+		cleanup_out_format(state, REC_TYPE_ATTR, "%s=%s",
+				   MAIL_ATTR_DSN_ORCPT, dsn_orcpt);
+	    cleanup_out_string(state, REC_TYPE_ORCP, orcpt);
+	    cleanup_out_string(state, REC_TYPE_RCPT, recip);
+	    state->rcpt_count++;
+	}
+    }
+
+    /*
+     * XXX DSN. RFC 3461 gives us three options for multi-recipient aliases
+     * (we're treating single recipient aliases as a special case of
+     * multi-recipient aliases, one argument being that it is none of the
+     * sender's business).
+     * 
+     * (a) Don't propagate ENVID, NOTIFY, RET, or ORCPT. If NOTIFY specified
+     * SUCCESS, send a "relayed" DSN.
+     * 
+     * (b) Propagate ENVID, (NOTIFY minus SUCCESS), RET, and ORCPT. If NOTIFY
+     * specified SUCCESS, send an "expanded" DSN.
+     * 
+     * (c) Propagate ENVID, NOTIFY, RET, and ORCPT to one recipient only. Send
+     * no DSN.
+     * 
+     * In all three cases we are modifying at least one NOTIFY value. Either we
+     * have to record explicit dsn_notify records, or we must not allow the
+     * use of a per-message non-default NOTIFY value that applies to all
+     * recipient records.
+     * 
+     * Alternatives (a) and (c) require that we store explicit per-recipient RET
+     * and ENVID records, at least for the recipients that are excluded from
+     * RET and ENVID propagation. This means storing explicit ENVID records
+     * to indicate that the information does not exist. All this makes
+     * alternative (b) more and more attractive. It is no surprise that we
+     * use (b) here and in the local delivery agent.
+     * 
+     * In order to generate a SUCCESS notification from the cleanup server we
+     * have to write the trace logfile record now. We're NOT going to flush
+     * the trace file from the cleanup server; if we need to write bounce
+     * logfile records, and the bounce service fails, we must be able to
+     * cancel the entire cleanup request including any success or failure
+     * notifications. The queue manager will flush the trace (and bounce)
+     * logfile, possibly after it has generated its own success or failure
+     * notification records.
+     * 
+     * Postfix 2.2 compatibility: when ignoring differences in Postfix original
+     * recipient information, also ignore differences in DSN attributes. We
+     * do, however, keep the DSN attributes of the recipient that survives
+     * duplicate elimination.
+     * 
+     * In the case of a verify(8) request for a one-to-many alias, declare the
+     * alias address as "deliverable". Do not verify the individual addresses
+     * in the expansion because that results in multiple verify(8) updates
+     * for one verify(8) request.
+     * 
+     * Multiple verify(8) updates for one verify(8) request would overwrite
+     * each other's status, and if the last status update is "undeliverable",
+     * then the whole alias is flagged as undeliverable.
+     */
+    else {
+	RECIPIENT rcpt;
+	DSN     dsn;
+
+	argv = cleanup_map1n_internal(state, recip, cleanup_virt_alias_maps,
+				  cleanup_ext_prop_mask & EXT_PROP_VIRTUAL);
+	if (argv->argc > 1 && (state->tflags & DEL_REQ_FLAG_MTA_VRFY)) {
+	    (void) DSN_SIMPLE(&dsn, "2.0.0", "aliased to multiple recipients");
+	    dsn.action = "deliverable";
+	    RECIPIENT_ASSIGN(&rcpt, 0, dsn_orcpt, dsn_notify, orcpt, recip);
+	    cleanup_verify_append(state, &rcpt, &dsn, DEL_RCPT_STAT_OK);
+	    argv_free(argv);
+	    return;
+	}
+	if ((dsn_notify & DSN_NOTIFY_SUCCESS)
+	    && (argv->argc > 1 || strcmp(recip, argv->argv[0]) != 0)) {
+	    (void) DSN_SIMPLE(&dsn, "2.0.0", "alias expanded");
+	    dsn.action = "expanded";
+	    RECIPIENT_ASSIGN(&rcpt, 0, dsn_orcpt, dsn_notify, orcpt, recip);
+	    cleanup_trace_append(state, &rcpt, &dsn);
+	    dsn_notify = (dsn_notify == DSN_NOTIFY_SUCCESS ? DSN_NOTIFY_NEVER :
+			  dsn_notify & ~DSN_NOTIFY_SUCCESS);
+	}
+	for (cpp = argv->argv; *cpp; cpp++) {
+	    if ((var_enable_orcpt ?
+		 been_here(state->dups, "%s\n%d\n%s\n%s",
+			   dsn_orcpt, dsn_notify, orcpt, *cpp) :
+		 been_here_fixed(state->dups, *cpp)) == 0) {
+		if (dsn_notify)
+		    cleanup_out_format(state, REC_TYPE_ATTR, "%s=%d",
+				       MAIL_ATTR_DSN_NOTIFY, dsn_notify);
+		if (*dsn_orcpt)
+		    cleanup_out_format(state, REC_TYPE_ATTR, "%s=%s",
+				       MAIL_ATTR_DSN_ORCPT, dsn_orcpt);
+		cleanup_out_string(state, REC_TYPE_ORCP, orcpt);
+		cleanup_out_string(state, REC_TYPE_RCPT, *cpp);
+		state->rcpt_count++;
+	    }
+	}
+	argv_free(argv);
+    }
+}