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lib/packet/udp: use checksum_ip()

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As side effect, IPv6 is also supported.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
This commit is contained in:
Isaku Yamahata 2013-03-29 12:51:01 +09:00 committed by FUJITA Tomonori
parent 3f72ee659d
commit 4053cda285
1 changed files with 2 additions and 5 deletions
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7
ryu/lib/packet/udp.py
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@ -17,7 +17,6 @@ import struct
from . import packet_base
from . import packet_utils
import ipv4
class udp(packet_base.PacketBase):
@ -45,10 +44,8 @@ class udp(packet_base.PacketBase):
h = struct.pack(udp._PACK_STR, self.src_port, self.dst_port,
self.total_length, self.csum)
if self.csum == 0:
ph = struct.pack('!IIBBH', prev.src, prev.dst, 0, 17,
self.total_length)
f = ph + h + payload
self.csum = packet_utils.checksum(f)
self.csum = packet_utils.checksum_ip(
prev, self.total_length, h + payload)
h = struct.pack(udp._PACK_STR, self.src_port, self.dst_port,
self.total_length, self.csum)
return h