diff options
| -rw-r--r-- | net/ieee802154/socket.c | 4 | ||||
| -rw-r--r-- | net/mac802154/iface.c | 12 | ||||
| -rw-r--r-- | net/mac802154/tx.c | 11 |
3 files changed, 13 insertions, 14 deletions
diff --git a/net/ieee802154/socket.c b/net/ieee802154/socket.c index be77f21..a548be2 100644 --- a/net/ieee802154/socket.c +++ b/net/ieee802154/socket.c @@ -273,7 +273,7 @@ static int raw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size) goto out; } - mtu = dev->mtu; + mtu = IEEE802154_MTU; pr_debug("name = %s, mtu = %u\n", dev->name, mtu); if (size > mtu) { @@ -637,7 +637,7 @@ static int dgram_sendmsg(struct sock *sk, struct msghdr *msg, size_t size) err = -ENXIO; goto out; } - mtu = dev->mtu; + mtu = IEEE802154_MTU; pr_debug("name = %s, mtu = %u\n", dev->name, mtu); if (size > mtu) { diff --git a/net/mac802154/iface.c b/net/mac802154/iface.c index 3954bcf..7079cd3 100644 --- a/net/mac802154/iface.c +++ b/net/mac802154/iface.c @@ -547,7 +547,17 @@ static void ieee802154_if_setup(struct net_device *dev) */ dev->needed_tailroom = IEEE802154_MAX_AUTH_TAG_LEN + IEEE802154_FCS_LEN; - dev->mtu = IEEE802154_MTU; + /* The mtu size is the payload without mac header in this case. + * We have a dynamic length header with a minimum header length + * which is hard_header_len. In this case we let mtu to the size + * of maximum payload which is IEEE802154_MTU - IEEE802154_FCS_LEN - + * hard_header_len. The FCS which is set by hardware or ndo_start_xmit + * and the minimum mac header which can be evaluated inside driver + * layer. The rest of mac header will be part of payload if greater + * than hard_header_len. + */ + dev->mtu = IEEE802154_MTU - IEEE802154_FCS_LEN - + dev->hard_header_len; dev->tx_queue_len = 300; dev->flags = IFF_NOARP | IFF_BROADCAST; } diff --git a/net/mac802154/tx.c b/net/mac802154/tx.c index b205bbe..3827f35 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); |