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From: Stoiko Ivanov <s.ivanov@proxmox.com>
To: pmg-devel@lists.proxmox.com
Subject: [pmg-devel] [PATCH pmg-api 4/4] pmg-smtp-filter: die if processing took longer than the timeout
Date: Mon, 11 Sep 2023 16:23:16 +0200	[thread overview]
Message-ID: <20230911142317.19746-5-s.ivanov@proxmox.com> (raw)
In-Reply-To: <20230911142317.19746-1-s.ivanov@proxmox.com>

In case a mail took longer to get processed than the configured
timeout - 1 second - `die` before running any action.

The `die` results in a temporary failure to be reported to the sending
server by PMG::SMTP.pm ("451 4.4.0 detected undelivered mail").

The reason for the 1s extra slack is to have some time to actually
run the action - and also justified that in both cases (postfix
detecting the timeout, and pmg-smtp-filter `die`ing the sender gets
a temporary failure reported back).

Tested with a small filter_timeout setting (30), and a larger sleep in
analyze_virus added in analyze virus.

Signed-off-by: Stoiko Ivanov <s.ivanov@proxmox.com>
---
 src/bin/pmg-smtp-filter | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/bin/pmg-smtp-filter b/src/bin/pmg-smtp-filter
index 011dd16..1c2c816 100755
--- a/src/bin/pmg-smtp-filter
+++ b/src/bin/pmg-smtp-filter
@@ -316,6 +316,12 @@ sub apply_rules {
 
     my $mod_group = PMG::ModGroup->new($entity, $msginfo->{targets});
 
+    my $processing_time = int(tv_interval($msginfo->{starttime}));
+    my $filter_timeout = $self->{pmg_cfg}->get('mail', 'filter_timeout');
+    if ( ($processing_time - 1) >= $filter_timeout) {
+	die "processing took $processing_time s, longer than the timeout ($filter_timeout)\n";
+    }
+
     foreach my $rule (@$rules) {
 	my $targets = $rule_targets{$rule->{id}};
 	next if !$targets;
@@ -637,6 +643,7 @@ sub handle_smtp {
 	$msginfo->{fqdn} = $msginfo->{hostname};
 	$msginfo->{fqdn} .= ".$msginfo->{domain}" if $msginfo->{domain};
 	$msginfo->{lcid} = $lcid;
+	$msginfo->{starttime} = $starttime;
 
 	# $msginfo->{targets} is case sensitive,
 	# but pmail is always lower case!
-- 
2.39.2





  parent reply	other threads:[~2023-09-11 14:23 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-09-11 14:23 [pmg-devel] [PATCH pmg-api/docs] make filter timeout configurable Stoiko Ivanov
2023-09-11 14:23 ` [pmg-devel] [PATCH pmg-api 1/4] templates: postfix: set same timeouts for before and after-queue Stoiko Ivanov
2023-09-11 14:23 ` [pmg-devel] [PATCH pmg-api 2/4] pmg-smtp-filter: refactor use of gettimeofday Stoiko Ivanov
2023-09-11 14:23 ` [pmg-devel] [PATCH pmg-api 3/4] config: postfix: make smtp-filter-timeout configurable Stoiko Ivanov
2024-01-12  9:15   ` Thomas Lamprecht
2023-09-11 14:23 ` Stoiko Ivanov [this message]
2024-01-12  9:19   ` [pmg-devel] [PATCH pmg-api 4/4] pmg-smtp-filter: die if processing took longer than the timeout Thomas Lamprecht
2023-09-11 14:23 ` [pmg-devel] [PATCH pmg-docs 1/1] doc-generator: add new option filter_timeout Stoiko Ivanov
2024-01-12  8:35 ` [pmg-devel] [PATCH pmg-api/docs] make filter timeout configurable Dominik Csapak
2024-01-12 19:59   ` Stoiko Ivanov

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