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packet lib: sctp: reduce computation

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Signed-off-by: Yuichi Ito <ito.yuichi0@gmail.com>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
This commit is contained in:
Yuichi Ito 2013-10-23 19:38:55 +09:00 committed by FUJITA Tomonori
parent a4693e6f2c
commit 6fe04218ce
1 changed files with 24 additions and 22 deletions
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46
ryu/lib/packet/sctp.py
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@ -1139,8 +1139,9 @@ class cause(stringify.StringifyMixin):
def __len__(self):
length = self.length
if length % 4:
length += 4 - length % 4
mod = length % 4
if mod:
length += 4 - mod
return length
@ -1166,9 +1167,9 @@ class cause_with_value(cause):
self._PACK_STR, self.cause_code(), self.length))
if self.value:
buf.extend(self.value)
if len(buf) % 4:
padsize = 4 - len(buf) % 4
buf.extend(bytearray(padsize))
mod = len(buf) % 4
if mod:
buf.extend(bytearray(4 - mod))
return str(buf)
@ -1269,9 +1270,9 @@ class cause_missing_param(cause):
self._PACK_STR, self.cause_code(), self.length, self.num))
for one in self.types:
buf.extend(struct.pack('!H', one))
if len(buf) % 4:
padsize = 4 - len(buf) % 4
buf.extend(bytearray(padsize))
mod = len(buf) % 4
if mod:
buf.extend(bytearray(4 - mod))
return str(buf)
@ -1398,9 +1399,9 @@ class cause_unresolvable_addr(cause_with_value):
self._PACK_STR, self.cause_code(), self.length))
if self.value:
buf.extend(self.value.serialize())
if len(buf) % 4:
padsize = 4 - len(buf) % 4
buf.extend(bytearray(padsize))
mod = len(buf) % 4
if mod:
buf.extend(bytearray(4 - mod))
return str(buf)
@ -1633,9 +1634,9 @@ class cause_restart_with_new_addr(cause_with_value):
self._PACK_STR, self.cause_code(), self.length))
for one in self.value:
buf.extend(one.serialize())
if len(buf) % 4:
padsize = 4 - len(buf) % 4
buf.extend(bytearray(padsize))
mod = len(buf) % 4
if mod:
buf.extend(bytearray(4 - mod))
return str(buf)
@ -1729,15 +1730,16 @@ class param(stringify.StringifyMixin):
self._PACK_STR, self.param_type(), self.length))
if self.value:
buf.extend(self.value)
if len(buf) % 4:
padsize = 4 - len(buf) % 4
buf.extend(bytearray(padsize))
mod = len(buf) % 4
if mod:
buf.extend(bytearray(4 - mod))
return str(buf)
def __len__(self):
length = self.length
if length % 4:
length += 4 - length % 4
mod = length % 4
if mod:
length += 4 - mod
return length
@ -1976,9 +1978,9 @@ class param_supported_addr(param):
self._PACK_STR, self.param_type(), self.length))
for one in self.value:
buf.extend(struct.pack(param_supported_addr._VALUE_STR, one))
if len(buf) % 4:
padsize = 4 - len(buf) % 4
buf.extend(bytearray(padsize))
mod = len(buf) % 4
if mod:
buf.extend(bytearray(4 - mod))
return str(buf)