Basic client/server thing going on with unencrypted OpenSSL

[hcoop/domtool2.git] / src / main.sml

diff --git a/src/main.sml b/src/main.sml
index 705b20a..bcadb63 100644 (file)
--- a/src/main.sml
+++ b/src/main.sml
@@ -26,6 +26,12 @@ structure SM = StringMap
 
 val dmy = ErrorMsg.dummyLoc
 
+fun init () = (F_OpenSSL_SML_add_all_algorithms.f' ();
+              F_OpenSSL_SML_load_error_strings.f' ();
+              F_OpenSSL_SML_load_BIO_strings.f' ())
+
+val () = init ()
+
 val defaultT : record ref = ref SM.empty
 val defaultV : (unit -> exp) SM.map ref = ref SM.empty
 
@@ -133,4 +139,111 @@ fun eval fname =
            Eval.exec (SM.map (fn f => f ()) (!defaultV)) body'
       | NONE => ()
 
+val dispatcher : C.rw ZString.zstring' =
+    ZString.dupML' (Config.dispatcher ^ ":" ^ Int.toString Config.dispatcherPort)
+
+val listenOn : C.rw ZString.zstring' =
+    ZString.dupML' ("localhost:" ^ Int.toString Config.dispatcherPort)
+
+fun ssl_err s =
+    let
+       val err = F_OpenSSL_SML_get_error.f ()
+    in
+       print s;
+       print "\nReason: ";
+       print (ZString.toML (F_OpenSSL_SML_lib_error_string.f err));
+       print ":";
+       print (ZString.toML (F_OpenSSL_SML_func_error_string.f err));
+       print ":";
+       print (ZString.toML (F_OpenSSL_SML_reason_error_string.f err));
+       print "\n"
+    end
+
+exception OpenSSL of string
+
+val readBuf : (C.uchar, C.rw) C.obj C.ptr' = C.alloc' C.S.uchar (Word.fromInt Config.bufSize)
+val bufSize = Int32.fromInt Config.bufSize
+
+fun readOne bio =
+    let
+       val r = F_OpenSSL_SML_read.f' (bio, C.Ptr.inject' readBuf, bufSize)
+    in
+       if r = 0 then
+           NONE
+       else if r < 0 then
+           raise OpenSSL "BIO_read failed"
+       else
+           SOME (CharVector.tabulate (Int32.toInt r,
+                                   fn i => chr (Word32.toInt (C.Get.uchar'
+                                                                  (C.Ptr.sub' C.S.uchar (readBuf, i))))))
+    end
+
+fun writeAll (bio, s) =
+    let
+       val buf = ZString.dupML' s
+
+       fun loop (buf, len) =
+           let
+               val r = F_OpenSSL_SML_write.f' (bio, C.Ptr.inject' buf, len)
+           in
+               if r = len then
+                   ()
+               else if r <= 0 then
+                   (C.free' buf;
+                    raise OpenSSL "BIO_write failed")
+               else
+                   loop (C.Ptr.|+! C.S.uchar (buf, Int32.toInt r), Int32.- (len, r))
+           end
+    in
+       loop (buf, Int32.fromInt (size s));
+       C.free' buf
+    end
+
+fun request fname =
+    let
+       val bio = F_OpenSSL_SML_new_connect.f' dispatcher
+    in
+       if C.Ptr.isNull' bio then
+           (ssl_err ("Error initializating connection to dispatcher at " ^ Config.dispatcher);
+            F_OpenSSL_SML_free_all.f' bio)
+       else if F_OpenSSL_SML_do_connect.f' bio <= 0 then
+           (ssl_err ("Error connecting to dispatcher at " ^ Config.dispatcher);
+            F_OpenSSL_SML_free_all.f' bio)
+       else let
+               val inf = TextIO.openIn fname
+
+               fun loop () =
+                   case TextIO.inputLine inf of
+                       NONE => ()
+                     | SOME line => (writeAll (bio, line);
+                                     loop ())
+           in
+               loop ();
+               TextIO.closeIn inf;
+               F_OpenSSL_SML_free_all.f' bio
+           end
+    end
+
+fun serviceOne () =
+    let
+       val bio = F_OpenSSL_SML_new_accept.f' listenOn
+    in
+       if C.Ptr.isNull' bio then
+           (ssl_err "Error initializating listener";
+            F_OpenSSL_SML_free_all.f' bio)
+       else if F_OpenSSL_SML_do_accept.f' bio <= 0 then
+           (ssl_err "Error accepting connection";
+            F_OpenSSL_SML_free_all.f' bio)
+       else let
+               fun loop () =
+                   case readOne bio of
+                       NONE => ()
+                     | SOME line => (print line;
+                                     loop ())
+           in
+               loop ();
+               F_OpenSSL_SML_free_all.f' bio
+           end
+    end
+
 end