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authorRobert Shearman <robertshearman@gmail.com>2021-03-30 11:14:41 +0100
committerNeale Ranns <neale@graphiant.com>2021-03-31 18:26:31 +0000
commit5ef22f7d2f583d2bc47b51c21d3236a3bec5b240 (patch)
tree47a13e96a82c3fa5c49cb8ead2bac0ea0450d5ae /src/plugins/mdata/mdata_doc.md
parentb2da6d6602876ce7338a4585f14330895e6bf672 (diff)
dpdk: fix packet offset for GCM crypto ops
The crypto op data offset passed into DPDK is relative to the mbuf buffer address plus the mbuf data offset, therefore the mbuf data offset needs to be set rather than left at whatever previous value it was at, which is likely to be incorrect and result in the wrong portion of the packet being encrypted/decrypted for GCM. The fe->crypto_start_offset field is relative to the start of the vlib buffer (as opposed to the current data pointer), so set the mbuf data_off field to VLIB_BUFFER_PRE_DATA_SIZE when performing a GCM crypto op enqueue to match the crypto_start_offset semantics. This then matches the behaviour in the non-GCM case. Type: fix Change-Id: I0ac2a44139387158765a3e04cfcaa5ee6f11d395 Signed-off-by: Robert Shearman <robertshearman@gmail.com>
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