Signed-off-by: YAMAMOTO Takashi <[email protected]>
---
ryu/ofproto/oxm_fields.py | 3 +++
1 file changed, 3 insertions(+)
diff --git a/ryu/ofproto/oxm_fields.py b/ryu/ofproto/oxm_fields.py
index 6c1565a..4aa390e 100644
--- a/ryu/ofproto/oxm_fields.py
+++ b/ryu/ofproto/oxm_fields.py
@@ -225,6 +225,7 @@ def parse(mod, buf, offset):
oxm_len = mod.oxm_tlv_header_extract_length(header)
oxm_class = oxm_type >> 7
if oxm_class == OFPXMC_EXPERIMENTER:
+ # Experimenter OXMs have 64-bit header. (vs 32-bit for other OXMs)
exp_hdr_pack_str = '!I' # experimenter_id
(exp_id, ) = struct.unpack_from(exp_hdr_pack_str, buf,
offset + hdr_len)
@@ -242,6 +243,8 @@ def parse(mod, buf, offset):
else:
num = oxm_type
exp_hdr_len = 0
+ # Note: OXM payload length (oxm_len) includes Experimenter ID (exp_hdr_len)
+ # for experimenter OXMs.
value_offset = offset + hdr_len + exp_hdr_len
value_len = oxm_len - exp_hdr_len
value_pack_str = '!%ds' % value_len
--
1.9.4
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