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List: openser-devel
Subject: [sr-dev] git:3.1: stun: fix padd macros
From: Andrei Pelinescu-Onciul <andrei () iptel ! org>
Date: 2011-04-29 23:03:12
Message-ID: 20110429230313.1400EEF804D () rimmer
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Module: sip-router
Branch: 3.1
Commit: 66af75fcdda45ed383f8493ea9b3d8b9b8c2cf47
URL: http://git.sip-router.org/cgi-bin/gitweb.cgi/sip-router/?a=commit;h=66af75fcdda45ed383f8493ea9b3d8b9b8c2cf47
Author: Andrei Pelinescu-Onciul <andrei@iptel.org>
Committer: Andrei Pelinescu-Onciul <andrei@iptel.org>
Date: Sat Apr 30 00:08:11 2011 +0200
stun: fix padd macros
The PADDED_TO_* macros did not work when the length was a multiple
of the pad value.
(FS#129)
Reported-by: Francesco Castellano
(cherry picked from commit 263ee122bc55f81db878ddea9ad4aa2bfd8afbae)
---
ser_stun.h | 9 +++++++--
1 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/ser_stun.h b/ser_stun.h
index 1e6051b..c0356bc 100644
--- a/ser_stun.h
+++ b/ser_stun.h
@@ -126,8 +126,13 @@ typedef unsigned long ULONG_T;
#define XOR 1
#define TRANSACTION_ID 12
-#define PADDED_TO_FOUR(len) (len == 0) ? 0 : len + (PAD4 - len%PAD4)
-#define PADDED_TO_SIXTYFOUR(len) (len == 0) ? 0 : len + (PAD64 - len%PAD64)
+/** padd len to a multiple of sz.
+ * sz must be a power of the form 2^k (e.g. 2, 4, 8, 16 ...)
+ */
+#define PADD_TO(len, sz) (((len) + (sz)-1) & (~((sz) - 1)))
+
+#define PADDED_TO_FOUR(len) PADD_TO(len, 4)
+#define PADDED_TO_SIXTYFOUR(len) PADD_TO(len, 64)
struct transaction_id {
UINT_T magic_cookie;
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