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| author | Alexander Aring <alex.aring@gmail.com> | 2015-09-28 09:00:26 +0200 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2015-09-30 13:16:44 +0200 |
| commit | d58a2fa903c18f97aac30cd3c4c8a378a2c647c4 (patch) | |
| tree | 2360d7c37869ea813208cd451a61b139fc02c323 /net/mac802154 | |
| parent | a26c5fd7622d4951425131d54a8c99f076fe2068 (diff) | |
| download | lwn-d58a2fa903c18f97aac30cd3c4c8a378a2c647c4.tar.gz lwn-d58a2fa903c18f97aac30cd3c4c8a378a2c647c4.zip | |
mac802154: add comments for llsec issues
While doing a little test with the llsec implementation I saw these
issues. We should move decryption and encruption somewhere else,
otherwise while capturing with wireshark the mac header shows secuirty
fields but the payload is plaintext.
A complete other issue is what doing with HardMAC drivers where the
payload is always plaintext. I think we need a special handling then in
userspace. We currently doesn't support any HardMAC transceivers, so we
should fix the first issue for SoftMAC transceivers.
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net/mac802154')
| -rw-r--r-- | net/mac802154/rx.c | 4 | ||||
| -rw-r--r-- | net/mac802154/tx.c | 4 |
2 files changed, 8 insertions, 0 deletions
diff --git a/net/mac802154/rx.c b/net/mac802154/rx.c index d1c33c1d6b9b..42e96729dae6 100644 --- a/net/mac802154/rx.c +++ b/net/mac802154/rx.c @@ -87,6 +87,10 @@ ieee802154_subif_frame(struct ieee802154_sub_if_data *sdata, skb->dev = sdata->dev; + /* TODO this should be moved after netif_receive_skb call, otherwise + * wireshark will show a mac header with security fields and the + * payload is already decrypted. + */ rc = mac802154_llsec_decrypt(&sdata->sec, skb); if (rc) { pr_debug("decryption failed: %i\n", rc); diff --git a/net/mac802154/tx.c b/net/mac802154/tx.c index 5ee596e00a6d..b205bbec7bdf 100644 --- a/net/mac802154/tx.c +++ b/net/mac802154/tx.c @@ -129,6 +129,10 @@ ieee802154_subif_start_xmit(struct sk_buff *skb, struct net_device *dev) struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev); int rc; + /* TODO we should move it to wpan_dev_hard_header and dev_hard_header + * functions. The reason is wireshark will show a mac header which is + * with security fields but the payload is not encrypted. + */ rc = mac802154_llsec_encrypt(&sdata->sec, skb); if (rc) { netdev_warn(dev, "encryption failed: %i\n", rc); |