commit 2d42e68aa032ed2f11471aee444935918d35c8bb
author Denis Ovsienko <infrastation@yandex.ru> Tue Sep 27 15:35:39 2011 +0400
committer Denis Ovsienko <infrastation@yandex.ru> Fri Sep 30 10:32:02 2011 +0400
tree a58e0b96bdb43fb6ed66a94afc0d44b737ca4c89
parent 214bcaa13e092d9fff8f233e62ba28ca7eefbc43

bgpd: ignore 4 bits of attribute flags byte

bgpd/bgp_attr.c

diff --git a/bgpd/bgp_attr.c b/bgpd/bgp_attr.c
index aa4ce8f..45a17fa 100644
--- a/bgpd/bgp_attr.c
+++ b/bgpd/bgp_attr.c
@@ -1788,7 +1788,10 @@
 
       /* Fetch attribute flag and type. */
       startp = BGP_INPUT_PNT (peer);
-      flag = stream_getc (BGP_INPUT (peer));
+      /* "The lower-order four bits of the Attribute Flags octet are
+         unused.  They MUST be zero when sent and MUST be ignored when
+         received." */
+      flag = 0xF0 & stream_getc (BGP_INPUT (peer));
       type = stream_getc (BGP_INPUT (peer));
 
       /* Check whether Extended-Length applies and is in bounds */