libwebsockets build fixes

1. Add --enable-libwebsockets option
2. Add OPENSSL_NO_EC (used in libwebsockets)
3. Add SSL_MODE_RELEASE_BUFFERS and debug message for when wolfSSL_CTX_set_mode doesn't recognize a mode.

configure.ac

@@ -182,6 +182,7 @@ then
     enable_stunnel=yes
     enable_nginx=yes
     enable_asio=yes
+    enable_libwebsockets=yes
     enable_pwdbased=yes
     enable_aeskeywrap=yes
     enable_x963kdf=yes
@@ -433,6 +434,7 @@ AC_ARG_ENABLE([mcast],
 # lighty (--enable-lighty) HAVE_LIGHTY
 # stunnel (--enable-stunnel) HAVE_STUNNEL
 # asio (--enable-asio) WOLFSSL_ASIO
+# libwebsockets (--enable-libwebsockets) WOLFSSL_LIBWEBSOCKETS
 # HAVE_POCO_LIB
 # WOLFSSL_MYSQL_COMPATIBLE
 # web server (--enable-webserver) HAVE_WEBSERVER
@@ -472,6 +474,18 @@ AC_ARG_ENABLE([fortress],
     [ ENABLED_FORTRESS=no ]
     )
 
+# libwebsockets Support
+AC_ARG_ENABLE([libwebsockets],
+    [AS_HELP_STRING([--enable-libwebsockets],[Enable libwebsockets (default: disabled)])],
+    [ ENABLED_LIBWEBSOCKETS=$enableval ],
+    [ ENABLED_LIBWEBSOCKETS=no ]
+    )
+if test "$ENABLED_LIBWEBSOCKETS" = "yes"
+then
+    AM_CFLAGS="$AM_CFLAGS -DWOLFSSL_LIBWEBSOCKETS -DOPENSSL_NO_EC"
+fi
+
+
 if test "$ENABLED_OPENSSH" = "yes"
 then
     ENABLED_FORTRESS="yes"
@@ -519,6 +533,10 @@ AC_ARG_ENABLE([opensslall],
 [ ENABLED_OPENSSLALL=$enableval ],
 [ ENABLED_OPENSSLALL=no ]
 )
+if test "$ENABLED_LIBWEBSOCKETS" = "yes"
+then
+    ENABLED_OPENSSLALL="yes"
+fi
 
 if test "$ENABLED_OPENSSLALL" = "yes"
 then
@@ -531,7 +549,7 @@ AC_ARG_ENABLE([opensslextra],
     [ ENABLED_OPENSSLEXTRA=$enableval ],
     [ ENABLED_OPENSSLEXTRA=no ]
     )
-if test "$ENABLED_OPENSSH" = "yes" || test "$ENABLED_NGINX" = "yes" || test "$ENABLED_SIGNAL" = "yes" || test "$ENABLED_WPAS" = "yes" || test "$ENABLED_FORTRESS" = "yes" || test "$ENABLED_BUMP" = "yes" || test "$ENABLED_SNIFFER" = "yes" || test "$ENABLED_OPENSSLALL" = "yes"
+if test "$ENABLED_OPENSSH" = "yes" || test "$ENABLED_NGINX" = "yes" || test "$ENABLED_SIGNAL" = "yes" || test "$ENABLED_WPAS" = "yes" || test "$ENABLED_FORTRESS" = "yes" || test "$ENABLED_BUMP" = "yes" || test "$ENABLED_SNIFFER" = "yes" || test "$ENABLED_OPENSSLALL" = "yes" || test "$ENABLED_LIBWEBSOCKETS" = "yes"
 then
     ENABLED_OPENSSLEXTRA="yes"
 fi
@@ -5134,6 +5152,7 @@ echo "   * STUNNEL:                    $ENABLED_STUNNEL"
 echo "   * Apache httpd:               $ENABLED_APACHE_HTTPD"
 echo "   * NGINX:                      $ENABLED_NGINX"
 echo "   * ASIO:                       $ENABLED_ASIO"
+echo "   * LIBWEBSOCKETS:              $ENABLED_LIBWEBSOCKETS"
 echo "   * SIGNAL:                     $ENABLED_SIGNAL"
 echo "   * ERROR_STRINGS:              $ENABLED_ERROR_STRINGS"
 echo "   * DTLS:                       $ENABLED_DTLS"

src/ssl.c

@@ -17267,6 +17267,11 @@ int wolfSSL_EVP_MD_type(const WOLFSSL_EVP_MD *md)
         WOLFSSL_ENTER("SSL_CTX_set_mode");
         if (mode == SSL_MODE_ENABLE_PARTIAL_WRITE)
             ctx->partialWrite = 1;
+        #ifdef DEBUG_WOLFSSL
+        else {
+            WOLFSSL_MSG("mode is not supported.");
+        }
+        #endif
 
         return mode;
     }

wolfssl/ssl.h

@@ -1601,10 +1601,11 @@ enum {
     SSL_CB_ACCEPT_EXIT = (SSL_ST_ACCEPT | SSL_CB_EXIT),
     SSL_CB_CONNECT_LOOP = (SSL_ST_CONNECT | SSL_CB_LOOP),
     SSL_CB_CONNECT_EXIT = (SSL_ST_CONNECT | SSL_CB_EXIT),
-	SSL_CB_MODE_READ = 1,
+    SSL_CB_MODE_READ = 1,
-	SSL_CB_MODE_WRITE = 2,
+    SSL_CB_MODE_WRITE = 2,
 
     SSL_MODE_ENABLE_PARTIAL_WRITE = 2,
+    SSL_MODE_RELEASE_BUFFERS = -1, /* For libwebsockets build. No current use. */
 
     BIO_FLAGS_BASE64_NO_NL = 1,
     BIO_CLOSE   = 1,