X-Git-Url: https://git.exim.org/users/jgh/exim.git/blobdiff_plain/ba5120a469a78ca316916e7be98c5fcb0ddd0d33..7a66b3afa11a70021297c176acf56831692be89a:/src/src/macros.h

diff --git a/src/src/macros.h b/src/src/macros.h
index cc96c8516..c99b152d5 100644
--- a/src/src/macros.h
+++ b/src/src/macros.h
@@ -152,12 +152,19 @@ enough to hold all the headers from a normal kind of message. */
 into big_buffer_size and in some circumstances increased. It should be at least
 as long as the maximum path length. */
 
-#if defined PATH_MAX && PATH_MAX > 16384
+#ifdef AUTH_HEIMDAL_GSSAPI
+		/* RFC 4121 section 5.2, SHOULD support 64K input buffers */
+# define __BIG_BUFFER_SIZE 65536
+#else
+# define __BIG_BUFFER_SIZE 16384
+#endif
+
+#if defined PATH_MAX && PATH_MAX > __BIG_BUFFER_SIZE
 # define BIG_BUFFER_SIZE PATH_MAX
-#elif defined MAXPATHLEN && MAXPATHLEN > 16384
+#elif defined MAXPATHLEN && MAXPATHLEN > __BIG_BUFFER_SIZE
 # define BIG_BUFFER_SIZE MAXPATHLEN
 #else
-# define BIG_BUFFER_SIZE 16384
+# define BIG_BUFFER_SIZE __BIG_BUFFER_SIZE
 #endif
 
 /* header size of pipe content