From: bert hubert <bert.hubert@netherlabs.nl>
Date: Thu, 22 Oct 2015 14:14:54 +0000 (+0200)
Subject: interim
X-Git-Tag: dnsdist-1.0.0-alpha1~252^2~6^2~19^2
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=afae4a71733c2b5333f2b54acace6ffeef64dd4b;p=pdns

interim
---

diff --git a/pdns/ixplore.cc b/pdns/ixplore.cc
index f4f6cafc7..c4fea2c76 100644
--- a/pdns/ixplore.cc
+++ b/pdns/ixplore.cc
@@ -17,6 +17,103 @@
 StatBag S;
 
 
+uint32_t getSerial(const ComboAddress& master, const DNSName& zone, shared_ptr<SOARecordContent>& sr)
+{
+  vector<uint8_t> packet;
+  DNSPacketWriter pw(packet, zone, QType::SOA);
+  
+  Socket s(master.sin4.sin_family, SOCK_DGRAM);
+  s.connect(master);
+  string msg((const char*)&packet[0], packet.size());
+  s.writen(msg);
+
+  string reply;
+  s.read(reply);
+  MOADNSParser mdp(reply);
+  for(const auto& r: mdp.d_answers) {
+    if(r.first.d_type == QType::SOA) {
+      sr = std::dynamic_pointer_cast<SOARecordContent>(r.first.d_content);
+      cout<<"Current serial number: "<<sr->d_st.serial<<endl;
+      return sr->d_st.serial;
+    }
+  }
+  return 0;
+}
+
+vector<vector<pair<vector<DNSRecord>, vector<DNSRecord> > > >  getIXFRDeltas(const ComboAddress& master, const DNSName& zone, shared_ptr<SOARecordContent> sr)
+{
+  vector<vector<pair<vector<DNSRecord>, vector<DNSRecord> > > > ret;
+  vector<uint8_t> packet;
+  DNSPacketWriter pw(packet, zone, QType::IXFR);
+  pw.getHeader()->qr=0;
+  pw.getHeader()->rd=0;
+  pw.startRecord(zone, QType::SOA, 3600, QClass::IN, DNSPacketWriter::AUTHORITY);
+  sr->toPacket(pw);
+  pw.commit();
+  
+  
+  uint16_t len=htons(packet.size());
+  string msg((const char*)&len, 2);
+  msg.append((const char*)&packet[0], packet.size());
+
+  Socket s(master.sin4.sin_family, SOCK_STREAM);
+  s.connect(master);
+  s.writen(msg);
+
+  // CURRENT MASTER SOA
+  // REPEAT:
+  //   SOA WHERE THIS DELTA STARTS
+  //   RECORDS TO REMOVE
+  //   SOA WHERE THIS DELTA GOES
+  //   RECORDS TO ADD
+  // CURRENT MASTER SOA 
+  shared_ptr<SOARecordContent> masterSOA;
+  vector<DNSRecord> records;
+  for(;;) {
+    if(s.read((char*)&len, 2)!=2)
+      break;
+    len=ntohs(len);
+    cout<<"Got chunk of "<<len<<" bytes"<<endl;
+    if(!len)
+      break;
+    char reply[len]; 
+    readn2(s.getHandle(), reply, len);
+    MOADNSParser mdp(string(reply, len));
+    cout<<"Got a response, rcode: "<<mdp.d_header.rcode<<", got "<<mdp.d_answers.size()<<" answers"<<endl;
+    for(const auto& r: mdp.d_answers) {
+      records.push_back(r.first);
+      if(r.first.d_type == QType::SOA) {
+	auto sr = std::dynamic_pointer_cast<SOARecordContent>(r.first.d_content);
+	if(!masterSOA) {
+	  masterSOA=sr;
+	}
+	else if(sr->d_st.serial == masterSOA->d_st.serial)
+	  goto done;
+
+      }
+    }
+  }
+ done:;
+  for(int pos = 1;pos < records.size();) {
+    auto sr = std::dynamic_pointer_cast<SOARecordContent>(records[pos].d_content);
+    if(sr->d_st.serial == masterSOA->d_st.serial)
+      break;
+    
+    cout<<"Got delta going from "<<sr->d_st.serial<<endl;
+    for(pos++; pos < records.size() && records[pos].d_type != QType::SOA; ++pos)
+      cout<<"Should remove "<<records[pos].d_name<<" "<<DNSRecordContent::NumberToType(records[pos].d_type)<<" "<<records[pos].d_content->getZoneRepresentation()<<endl;
+    sr = std::dynamic_pointer_cast<SOARecordContent>(records[pos].d_content);
+    cout<<"This delta goes to "<<sr->d_st.serial<<endl;
+    for(pos++; pos < records.size() && records[pos].d_type != QType::SOA; ++pos) 
+      cout<<"Should ADD "<<records[pos].d_name<<" "<<DNSRecordContent::NumberToType(records[pos].d_type)<<" "<<records[pos].d_content->getZoneRepresentation()<<endl;
+    cout<<"End of this delta"<<endl<<endl;
+  }
+  
+  return ret;
+  
+}
+
+
 int main(int argc, char** argv)
 try
 {
@@ -26,9 +123,8 @@ try
   }
 
   reportAllTypes();
-  dns_random_init("0123456789abcdef");
 
-  /* goal in life:
+    /* goal in life:
      in directory/zone-name we leave files with their name the serial number
      at startup, retrieve current SOA SERIAL for domain from master server
      
@@ -38,24 +134,15 @@ try
      Next up, loop this every REFRESH seconds */
 
   DNSName zone(argv[3]);
-  vector<uint8_t> packet;
-  DNSPacketWriter pw(packet, zone, QType::SOA);
+  
   ComboAddress master(argv[1], atoi(argv[2]));
 
-  Socket s(master.sin4.sin_family, SOCK_DGRAM);
-  s.connect(master);
-  string msg((const char*)&packet[0], packet.size());
-  s.writen(msg);
+  shared_ptr<SOARecordContent> sr;
+  uint32_t serial = getSerial(master, zone, sr);
+  sr->d_st.serial=1445514388;
 
-  string reply;
-  s.read(reply);
-  MOADNSParser mdp(reply);
-  for(const auto& r: mdp.d_answers) {
-    if(r.first.d_type == QType::SOA) {
-      auto sr = std::dynamic_pointer_cast<SOARecordContent>(r.first.d_content);
-      cout<<"Current serial number: "<<sr->d_st.serial<<endl;
-    }
-  }
+  auto deltas = getIXFRDeltas(master, zone, sr);
+  
   
 
 }