* Have the HTTP 0.9 / 1.1 processing code reject requests for

  HTTP >= 2.0 with a HTTP Version Not Support status code.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1878708 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 14 insertions, 2 deletions

diff --git a/server/protocol.c b/server/protocol.c
index 76baabbe29..6eb1786459 100644
--- a/server/protocol.c
+++ b/server/protocol.c
@@ -748,7 +748,7 @@ AP_DECLARE(int) ap_parse_request_line(request_rec *r)
     enum {
         rrl_none, rrl_badmethod, rrl_badwhitespace, rrl_excesswhitespace,
         rrl_missinguri, rrl_baduri, rrl_badprotocol, rrl_trailingtext,
-        rrl_badmethod09, rrl_reject09
+        rrl_badmethod09, rrl_reject09, rrl_versionnotsupported
     } deferred_error = rrl_none;
     apr_size_t len = 0;
     char *uri, *ll;
@@ -897,6 +897,11 @@ rrl_done:
         r->proto_num = HTTP_VERSION(0, 9);
     }
 
+    if (strict && deferred_error == rrl_none
+        && r->proto_num >= HTTP_VERSION(2, 0)) {
+        deferred_error = rrl_versionnotsupported;
+    }
+
     /* Determine the method_number and parse the uri prior to invoking error
      * handling, such that these fields are available for substitution
      */
@@ -918,6 +923,7 @@ rrl_done:
      * we can safely resume any deferred error reporting
      */
     if (deferred_error != rrl_none) {
+        r->status = HTTP_BAD_REQUEST;
         if (deferred_error == rrl_badmethod)
             ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(03445)
                           "HTTP Request Line; Invalid method token: '%.*s'",
@@ -954,7 +960,13 @@ rrl_done:
                           "HTTP Request Line; Unrecognized protocol '%.*s' "
                           "(perhaps whitespace was injected?)",
                           field_name_len(r->protocol), r->protocol);
-        r->status = HTTP_BAD_REQUEST;
+        else if (deferred_error == rrl_versionnotsupported) {
+            ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO()
+                          "HTTP Request Line; Protocol '%.*s' >= HTTP/2.0 not"
+                          " supported", field_name_len(r->protocol),
+                          r->protocol);
+            r->status = HTTP_VERSION_NOT_SUPPORTED;
+        }
         goto rrl_failed;
     }