From 059897bf907022e416db9af21f5bb1c8fbd824d1 Mon Sep 17 00:00:00 2001
From: Xnoe <xnoe@xnoe.moe>
Date: Tue, 10 Jan 2023 22:59:03 +0000
Subject: [PATCH] Changed error level to NOTICE and return NULL when an error
 is encountered

---
 rdns--1.0.sql | 4 ++--
 rdns.c        | 6 ++++--
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/rdns--1.0.sql b/rdns--1.0.sql
index 6a01ea6..9662825 100644
--- a/rdns--1.0.sql
+++ b/rdns--1.0.sql
@@ -1,9 +1,9 @@
 CREATE FUNCTION rdns_lookup(text)
 RETURNS text
-AS '$libdir/rdns'
+IMMUTABLE AS '$libdir/rdns'
 LANGUAGE C STRICT;
 
 CREATE FUNCTION circular_rdns_lookup(text)
 RETURNS text
-AS '$libdir/rdns'
+IMMUTABLE AS '$libdir/rdns'
 LANGUAGE C STRICT;
diff --git a/rdns.c b/rdns.c
index 5ffacfe..f762f7e 100644
--- a/rdns.c
+++ b/rdns.c
@@ -61,14 +61,16 @@ Datum circular_rdns_lookup(PG_FUNCTION_ARGS) {
   if (r == EAI_NONAME)
     PG_RETURN_NULL();
   if (r) {
-    ereport(ERROR, (errcode(ERRCODE_SYSTEM_ERROR), errmsg("getnameinfo failed! %s", gai_strerror(r))));
+    ereport(NOTICE, (errcode(ERRCODE_SYSTEM_ERROR), errmsg("getnameinfo failed for IP `%s`, %s", ip, gai_strerror(r))));
+    PG_RETURN_NULL();
   }
 
   hint.ai_family = AF_INET;
 
   r = getaddrinfo(host, 0, &hint, &results);
   if (r) {
-    ereport(ERROR, (errcode(ERRCODE_SYSTEM_ERROR), errmsg("getaddrinfo failed! %s", gai_strerror(r))));
+    ereport(NOTICE, (errcode(ERRCODE_SYSTEM_ERROR), errmsg("getaddrinfo failed for host `%s`, %s", host, gai_strerror(r))));
+    PG_RETURN_NULL();
   }
 
   c = results;