From 348bd85500f5cb5dc4b239e98d9459dbe71f96bc Mon Sep 17 00:00:00 2001
From: John Denker <jsd@av8n.com>
Date: Sat, 24 Nov 2012 09:28:10 -0800
Subject: make rare DNS errors non-fatal

---
 tools/greylist.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

(limited to 'tools/greylist.c')

diff --git a/tools/greylist.c b/tools/greylist.c
index 9af70eb..aaa9510 100644
--- a/tools/greylist.c
+++ b/tools/greylist.c
@@ -413,7 +413,7 @@ int whatsit::check_dns(){
   int sts = check_dns_sub(addr, host, checked);
   if (sts == 0) return sts;
   if (sts != ex_badDNS) return sts;     // possible ex_syserr
-#if 1
+#ifndef badDNSfatal
   sts = 0;      // demote badDNS to just a warning
 #endif
   cerr << progid;
@@ -431,6 +431,11 @@ int whatsit::check_dns(){
 
 int whatsit::check_dns_sub(string &addr, string &host, vector<string> &checked){
 
+#ifdef badDNSfatal
+  int ex_dns_fail = ex_syserr;
+#else
+  int ex_dns_fail = ex_badDNS;
+#endif
   struct addrinfo *result;
   struct addrinfo *ipresult;
   struct addrinfo *res;
@@ -450,11 +455,12 @@ int whatsit::check_dns_sub(string &addr, string &host, vector<string> &checked){
       << " odd error " << error
       << "  in getaddrinfo for " << ipvar
       << " : " << gai_strerror(error) << endl;
-    return ex_syserr;
+
+    return ex_dns_fail;
   }
   if (!ipresult) {
     cerr << "should never happen (addr with no addrs?)" << endl;
-    return ex_syserr;
+    return ex_dns_fail;
   }
   VUx ipAddr = parse_sockaddr(ipresult->ai_addr);
   addr = ipAddr.str();
@@ -471,7 +477,7 @@ int whatsit::check_dns_sub(string &addr, string &host, vector<string> &checked){
       << " compare " << EAI_NONAME
       << "  in getaddrinfo for " << ipvar
       << " :: " << gai_strerror(error) << endl;
-    return ex_syserr;
+    return ex_dns_fail;
   }
 
 // loop over all returned results and check for a match.
-- 
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