diff options
| author | Alexander Aring <alex.aring@gmail.com> | 2015-09-28 12:36:26 +0200 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2015-09-30 13:21:32 +0200 |
| commit | b40988c438c2405a177ae54ff4baa08c720c296f (patch) | |
| tree | 255faa1cdb6a7398d61df143b563b42916998c69 /net/mac802154/tx.c | |
| parent | mac802154: add comments for llsec issues (diff) | |
| download | linux-b40988c438c2405a177ae54ff4baa08c720c296f.tar.xz linux-b40988c438c2405a177ae54ff4baa08c720c296f.zip | |
ieee802154: change mtu size behaviour
This patch changes the mtu size of 802.15.4 interfaces. The current
setting is the meaning of the maximum transport unit with mac header,
which is 127 bytes according 802.15.4. The linux meaning of the mtu size
field is the maximum payload of a mac frame. Like in ethernet, which is
1500 bytes.
We have dynamic length of mac frames in 802.15.4, this is why we assume
the minimum header length which is hard_header_len. This contains fc and
sequence fields. These can evaluated by driver layer without additional
checks. We currently don't support to set the FCS from userspace, so we
need to subtract this from mtu size as well.
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net/mac802154/tx.c')
| -rw-r--r-- | net/mac802154/tx.c | 11 |
1 files changed, 0 insertions, 11 deletions
diff --git a/net/mac802154/tx.c b/net/mac802154/tx.c index b205bbec7bdf..3827f359b336 100644 --- a/net/mac802154/tx.c +++ b/net/mac802154/tx.c @@ -71,17 +71,6 @@ ieee802154_tx(struct ieee802154_local *local, struct sk_buff *skb) struct net_device *dev = skb->dev; int ret; - /* This check is for AF_PACKET RAW socket only, which doesn't - * know about the FCS which is set here or by hardware. otherwise - * it should not occur in any case! - * - * TODO: This should be handled in AF_PACKET and return -EMSGSIZE. - */ - if (skb->len > IEEE802154_MTU - IEEE802154_FCS_LEN) { - netdev_warn(dev, "Frame len above MTU limit. Dropped.\n"); - goto err_tx; - } - if (!(local->hw.flags & IEEE802154_HW_TX_OMIT_CKSUM)) { u16 crc = crc_ccitt(0, skb->data, skb->len); |