add from_heuristics.?? as a stub

src/Makefile

@@ -20,6 +20,7 @@ accountSettings_test: accountSettings_test.o libAccountSettings.a
 
 libAccountSettings.a: account_settings_internal.o implementation.o \
       isp_db.o \
+      from_heuristics.o \
       from_srv.o
 	ar rcs $@ $^
 

src/from_heuristics.cc

@@ -0,0 +1,59 @@
+#include "from_heuristics.hh"
+#include "account_settings_internal.hh"
+#include <ldns/ldns.h>
+#include <stdexcept>
+#include <memory>
+
+
+class protocol_error : public std::runtime_error
+{
+public:
+	protocol_error() : std::runtime_error("Protocol error!")
+	{}
+};
+
+namespace
+{
+	// TODO: implement!
+	class Protocol
+	{
+	public:
+		Protocol() = default;
+	};
+
+
+	AS_Server probe_server(const std::string& domain, std::initializer_list<std::string> names, Protocol p=Protocol() )
+	{
+		AS_Server ass { "", -1, AS_ACCESS(-1), "" };
+		
+		throw protocol_error{};
+	}
+
+} //end of anonymous namespace
+
+
+AccountSettings* get_settings_from_heuristics(AccountSettings* as, const std::string& accountName, const std::string& domain, const std::string& provider)
+{
+	if(as==nullptr)
+	{
+		throw std::runtime_error("get_settings_from_heuristics shall not be called with NULL pointer!");
+	}
+
+//	fprintf(stderr, "== IMAP ==\n");
+	try{
+		as->incoming = probe_server( domain, {"imap", "mail", "imaps", "imapmail", "imap-mail", "mx", "", "mbox",} );
+	}catch( const protocol_error& )
+	{
+		// ignore protocol errors
+	}
+
+//	fprintf(stderr, "== SMTP ==\n");
+	try{
+		as->outgoing = probe_server( domain, {"smtp", "mail", "smtps", "smtpmail", "smtp-mail", "mx", "", "smtpauth",} );
+	}catch( const protocol_error& )
+	{
+		// ignore protocol errors
+	}
+	
+	return as;
+}

src/from_heuristics.hh

@@ -0,0 +1,8 @@
+#ifndef ACCOUNT_SETTINGS_FROM_HEURISTICS_HH
+#define ACCOUNT_SETTINGS_FROM_HEURISTICS_HH
+
+#include "account_settings_internal.hh"
+
+AccountSettings* get_settings_from_heuristics(AccountSettings* as, const std::string& accountName, const std::string& domain, const std::string& provider);
+
+#endif // ACCOUNT_SETTINGS_FROM_HEURISTICS_HH

src/implementation.cc

@@ -4,6 +4,7 @@
 #include <stdexcept>
 
 #include "from_srv.hh"
+#include "from_heuristics.hh"
 
 namespace
 {
@@ -97,6 +98,11 @@ const AccountSettings* get_account_settings(const char* accountName, const char*
 	{
 		get_settings_from_srv(dyn_as, accountName, domain, provider );
 	}
+
+	if( dyn_as->status != AS_OK && (flags & AS_FLAG_USE_HEURISTICS) )
+	{
+		get_settings_from_heuristics(dyn_as, accountName, domain, provider );
+	}
 	
 	return dyn_as;
 }