RFC2402 says:
All IPv6 extension headers, as per RFC 1883, encode the "Hdr Ext Len"
field by first
subtracting 1 (64-bit word) from the header length (measured in 64-bit
words).
AH is an IPv6 extension header. However, since its length is measured
in 32-bit words,
the "Payload Length" is calculated by subtracting 2 (32 bit words).
This patch fixes as follows:
return (int(size) - 1) * 8 ->
return (int(size) + 2) * 4
^ ^ ^
Signed-off-by: TAKAHASHI Minoru <[email protected]>
---
ryu/lib/packet/ipv6.py | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/ryu/lib/packet/ipv6.py b/ryu/lib/packet/ipv6.py
index 960f1ac..6b29a7c 100644
--- a/ryu/lib/packet/ipv6.py
+++ b/ryu/lib/packet/ipv6.py
@@ -420,7 +420,7 @@ class auth(header):
@classmethod
def _get_size(cls, size):
- return (int(size) - 1) * 8
+ return (int(size) + 2) * 4
@classmethod
def parser(cls, buf):
--
1.7.10.4
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