From effe1d81c837e1b887c307ed607459791bd7c8b5 Mon Sep 17 00:00:00 2001
From: John Denker <jsd@av8n.com>
Date: Sat, 21 Jul 2012 10:45:40 -0700
Subject: doesn't work, don't know why

---
 tools/greylist.c | 81 ++++++++++++++++++++++++++++++++++++++++++--------------
 1 file changed, 61 insertions(+), 20 deletions(-)

diff --git a/tools/greylist.c b/tools/greylist.c
index b64636e..f9a4ebc 100644
--- a/tools/greylist.c
+++ b/tools/greylist.c
@@ -371,6 +371,45 @@ int whatsit::doit(const int penalty){
   return 0;
 }
 
+typedef vector<unsigned char> VU;
+
+class VUx : public VU {
+public:
+  sa_family_t fam;  
+};
+
+VUx parse_sockaddr(const sockaddr* ai_addr) {
+    void* numericAddress;
+    VUx rslt;
+    int addrsize;
+    rslt.fam = ((sockaddr *)ai_addr)->sa_family;
+    switch (rslt.fam) {
+    case AF_INET:
+      numericAddress = &(((sockaddr_in *)ai_addr)->sin_addr.s_addr);
+      addrsize = sizeof(in_addr);
+      break;
+    case AF_INET6:
+      numericAddress = &(((sockaddr_in6 *)ai_addr)->sin6_addr.s6_addr);
+      addrsize = sizeof(in6_addr);
+      break;
+    default:
+      cerr << "?Unknown address family " << rslt.fam << endl;
+      return rslt;
+    }
+    unsigned char* foo = (unsigned char*) numericAddress;
+    (VU)rslt = VU(foo, foo+addrsize);
+    cerr << "asdf " << rslt.size() << " ... " << VU(foo, foo+addrsize).size() << endl;
+    return rslt;
+}
+
+int diff(const VU aaa, const VU bbb){
+  if(aaa.size() != bbb.size()) return 1;
+  for (unsigned int ii=0; ii < aaa.size(); ii++){
+    if (aaa[ii] != bbb[ii]) return 1;
+  }
+  return 0;
+}
+
 int whatsit::check_dns(){
   char* hostvar = getenv("TCPREMOTEHOST");
   if (!hostvar) {
@@ -392,39 +431,41 @@ int whatsit::check_dns(){
   // restrict to TCP only; otherwise we get N records per address
   hints.ai_protocol = IPPROTO_TCP;
 #endif
-  error = getaddrinfo(hostvar, NULL, &hints, &result);
+
+  error = getaddrinfo(ipvar, NULL, &hints, &ipresult);
   if (error) {
-    cerr << "error in getaddrinfo for " << hostvar
+    cerr << "error in getaddrinfo for " << ipvar
       << " : " << gai_strerror(error) << endl;
     return ex_syserr;
   }
+  if (!ipresult) {
+    cerr << "should never happen (addr with no addrs?)" << endl;
+    return ex_syserr;
+  }
 
-  error = getaddrinfo(ipvar, NULL, &hints, &ipresult);
+  VU ipAddr = parse_sockaddr(ipresult->ai_addr);
+  error = getaddrinfo(hostvar, NULL, &hints, &result);
   if (error) {
-    cerr << "error in getaddrinfo for " << ipvar
+    cerr << "error in getaddrinfo for " << hostvar
       << " : " << gai_strerror(error) << endl;
     return ex_syserr;
   }
 
 // loop over all returned results and check for a match.
+  vector<string> checked_hosts;
   for (res = result; res != NULL; res = res->ai_next){
-    void *numericAddress;
-
-    sa_family_t fam = ((sockaddr *)res->ai_addr)->sa_family;
-    int addrsize;
-    switch (fam) {
-    case AF_INET:
-      numericAddress = &(((sockaddr_in *)res->ai_addr)->sin_addr.s_addr);
-      addrsize = sizeof(in_addr);
-      break;
-    case AF_INET6:
-      numericAddress = &(((sockaddr_in6 *)res->ai_addr)->sin6_addr.s6_addr);
-      addrsize = sizeof(in6_addr);
-      break;
-    default:
-      cerr << "?Unknown address family " << fam << endl;
-      return(ex_syserr);
+    VU hostAddr = parse_sockaddr(res->ai_addr);
+#if 0
+    char msgbuf[INET6_ADDRSTRLEN];
+    const char* rslt = inet_ntop(fam, numericAddress,
+          msgbuf, sizeof(msgbuf));
+#endif
+    if (!diff(hostAddr, ipAddr)) {
+      cerr << "match! " << ipAddr.size() << endl;
+      goto done;
     }
   }
+  cerr << "no match" << endl;
+done:
   return 0;
 }
-- 
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