Signed-off-by: HIYAMA Manabu <[email protected]>
---
ryu/lib/packet/ipv4.py | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/ryu/lib/packet/ipv4.py b/ryu/lib/packet/ipv4.py
index d3cc4b3..99140d4 100644
--- a/ryu/lib/packet/ipv4.py
+++ b/ryu/lib/packet/ipv4.py
@@ -73,7 +73,7 @@ class ipv4(packet_base.PacketBase):
self.ttl, self.proto, 0, self.src, self.dst)
if self.option:
- assert struct.calcsize('I') >= len(self.option)
+ assert (self.length - ipv4._MIN_LEN) >= len(self.option)
hdr[ipv4._MIN_LEN:ipv4._MIN_LEN + len(self.option)] = self.option
self.csum = socket.htons(packet_utils.checksum(hdr))
--
1.7.9.5
------------------------------------------------------------------------------
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