From 5648c27c150c66df417269f1daa398e1dc2f6a86 Mon Sep 17 00:00:00 2001
From: Aki Tuomi <cmouse@cmouse.fi>
Date: Fri, 30 Nov 2018 13:55:32 +0200
Subject: [PATCH] pdns_notify: Implement 60 second timeout

---
 pdns/notify.cc | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/pdns/notify.cc b/pdns/notify.cc
index 270aaad36..d44577145 100644
--- a/pdns/notify.cc
+++ b/pdns/notify.cc
@@ -121,11 +121,32 @@ try
     }
 
     char buffer[1500];
+    fd_set rfds;
+    FD_ZERO(&rfds);
+    FD_SET(sock, &rfds);
+    int len;
+    struct timeval tv;
+    bool timeout = true;
+
+    for(int tries=0; tries<60; tries++) {
+      tv.tv_sec = 1;
+      tv.tv_usec = 0;
+      if ((len = select(sock+1, &rfds, NULL, &rfds, &tv)) > 0) {
+        len = recv(sock, buffer, sizeof(buffer), 0);
+        timeout = false;
+        break;
+      }
+    }
 
-    int len=recv(sock, buffer, sizeof(buffer),0);
     if(len < 0) {
       cerr<<"Unable to receive notification response from PowerDNS: "+stringerror()<<endl;
       continue;
+    } else if (timeout) {
+      cerr<<"Unable to receive notification response from PowerDNS: Timed out"<<endl;
+      continue;
+    } else if (len == 0) {
+      cerr<<"Unable to receive notification response from PowerDNS: EOF"<<endl;
+      continue;
     }
 
     string packet(buffer, len);
-- 
2.40.0