diff options
| author | Linus Lüssing <linus.luessing@c0d3.blue> | 2015-06-30 23:45:26 +0200 |
|---|---|---|
| committer | Antonio Quartulli <antonio@meshcoding.com> | 2015-08-14 22:52:10 +0200 |
| commit | 53cf037bf846417fd92dc92ddf97267f69b110f4 (patch) | |
| tree | 677bf06ed90113864db8726610736564b4c13da2 /net/batman-adv/soft-interface.c | |
| parent | 3f1e08d0ae6746379b9e21264dae52f4f35c7ad2 (diff) | |
| download | lwn-53cf037bf846417fd92dc92ddf97267f69b110f4.tar.gz lwn-53cf037bf846417fd92dc92ddf97267f69b110f4.zip | |
batman-adv: Fix potentially broken skb network header access
The two commits noted below added calls to ip_hdr() and ipv6_hdr(). They
need a correctly set skb network header.
Unfortunately we cannot rely on the device drivers to set it for us.
Therefore setting it in the beginning of the according ndo_start_xmit
handler.
Fixes: 1d8ab8d3c176 ("batman-adv: Modified forwarding behaviour for multicast packets")
Fixes: ab49886e3da7 ("batman-adv: Add IPv4 link-local/IPv6-ll-all-nodes multicast support")
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
Diffstat (limited to 'net/batman-adv/soft-interface.c')
| -rw-r--r-- | net/batman-adv/soft-interface.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c index c002961da75d..926292d5ffa8 100644 --- a/net/batman-adv/soft-interface.c +++ b/net/batman-adv/soft-interface.c @@ -202,6 +202,7 @@ static int batadv_interface_tx(struct sk_buff *skb, int gw_mode; enum batadv_forw_mode forw_mode; struct batadv_orig_node *mcast_single_orig = NULL; + int network_offset = ETH_HLEN; if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE) goto dropped; @@ -214,14 +215,18 @@ static int batadv_interface_tx(struct sk_buff *skb, case ETH_P_8021Q: vhdr = vlan_eth_hdr(skb); - if (vhdr->h_vlan_encapsulated_proto != ethertype) + if (vhdr->h_vlan_encapsulated_proto != ethertype) { + network_offset += VLAN_HLEN; break; + } /* fall through */ case ETH_P_BATMAN: goto dropped; } + skb_set_network_header(skb, network_offset); + if (batadv_bla_tx(bat_priv, skb, vid)) goto dropped; |