diff options
Diffstat (limited to 'net/batman-adv/soft-interface.c')
| -rw-r--r-- | net/batman-adv/soft-interface.c | 61 |
1 files changed, 43 insertions, 18 deletions
diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c index 8a136b6a1..287a3879e 100644 --- a/net/batman-adv/soft-interface.c +++ b/net/batman-adv/soft-interface.c @@ -186,7 +186,6 @@ static int batadv_interface_tx(struct sk_buff *skb, struct batadv_priv *bat_priv = netdev_priv(soft_iface); struct batadv_hard_iface *primary_if = NULL; struct batadv_bcast_packet *bcast_packet; - __be16 ethertype = htons(ETH_P_BATMAN); static const u8 stp_addr[ETH_ALEN] = {0x01, 0x80, 0xC2, 0x00, 0x00, 0x00}; static const u8 ectp_addr[ETH_ALEN] = {0xCF, 0x00, 0x00, 0x00, @@ -208,7 +207,7 @@ static int batadv_interface_tx(struct sk_buff *skb, if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE) goto dropped; - soft_iface->trans_start = jiffies; + netif_trans_update(soft_iface); vid = batadv_get_vid(skb, 0); ethhdr = eth_hdr(skb); @@ -216,7 +215,8 @@ 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) { + /* drop batman-in-batman packets to prevent loops */ + if (vhdr->h_vlan_encapsulated_proto != htons(ETH_P_BATMAN)) { network_offset += VLAN_HLEN; break; } @@ -381,13 +381,29 @@ end: return NETDEV_TX_OK; } +/** + * batadv_interface_rx - receive ethernet frame on local batman-adv interface + * @soft_iface: local interface which will receive the ethernet frame + * @skb: ethernet frame for @soft_iface + * @hdr_size: size of already parsed batman-adv header + * @orig_node: originator from which the batman-adv packet was sent + * + * Sends a ethernet frame to the receive path of the local @soft_iface. + * skb->data has still point to the batman-adv header with the size @hdr_size. + * The caller has to have parsed this header already and made sure that at least + * @hdr_size bytes are still available for pull in @skb. + * + * The packet may still get dropped. This can happen when the encapsulated + * ethernet frame is invalid or contains again an batman-adv packet. Also + * unicast packets will be dropped directly when it was sent between two + * isolated clients. + */ void batadv_interface_rx(struct net_device *soft_iface, - struct sk_buff *skb, struct batadv_hard_iface *recv_if, - int hdr_size, struct batadv_orig_node *orig_node) + struct sk_buff *skb, int hdr_size, + struct batadv_orig_node *orig_node) { struct batadv_bcast_packet *batadv_bcast_packet; struct batadv_priv *bat_priv = netdev_priv(soft_iface); - __be16 ethertype = htons(ETH_P_BATMAN); struct vlan_ethhdr *vhdr; struct ethhdr *ethhdr; unsigned short vid; @@ -396,10 +412,6 @@ void batadv_interface_rx(struct net_device *soft_iface, batadv_bcast_packet = (struct batadv_bcast_packet *)skb->data; is_bcast = (batadv_bcast_packet->packet_type == BATADV_BCAST); - /* check if enough space is available for pulling, and pull */ - if (!pskb_may_pull(skb, hdr_size)) - goto dropped; - skb_pull_rcsum(skb, hdr_size); skb_reset_mac_header(skb); @@ -421,7 +433,8 @@ void batadv_interface_rx(struct net_device *soft_iface, vhdr = (struct vlan_ethhdr *)skb->data; - if (vhdr->h_vlan_encapsulated_proto != ethertype) + /* drop batman-in-batman packets to prevent loops */ + if (vhdr->h_vlan_encapsulated_proto != htons(ETH_P_BATMAN)) break; /* fall through */ @@ -543,7 +556,7 @@ struct batadv_softif_vlan *batadv_softif_vlan_get(struct batadv_priv *bat_priv, } /** - * batadv_create_vlan - allocate the needed resources for a new vlan + * batadv_softif_create_vlan - allocate the needed resources for a new vlan * @bat_priv: the bat priv with all the soft interface information * @vid: the VLAN identifier * @@ -872,13 +885,14 @@ static int batadv_softif_slave_add(struct net_device *dev, struct net_device *slave_dev) { struct batadv_hard_iface *hard_iface; + struct net *net = dev_net(dev); int ret = -EINVAL; hard_iface = batadv_hardif_get_by_netdev(slave_dev); if (!hard_iface || hard_iface->soft_iface) goto out; - ret = batadv_hardif_enable_interface(hard_iface, dev->name); + ret = batadv_hardif_enable_interface(hard_iface, net, dev->name); out: if (hard_iface) @@ -959,7 +973,7 @@ static void batadv_softif_init_early(struct net_device *dev) dev->netdev_ops = &batadv_netdev_ops; dev->destructor = batadv_softif_free; - dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER; + dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_NETNS_LOCAL; dev->priv_flags |= IFF_NO_QUEUE; /* can't call min_mtu, because the needed variables @@ -975,7 +989,7 @@ static void batadv_softif_init_early(struct net_device *dev) memset(priv, 0, sizeof(*priv)); } -struct net_device *batadv_softif_create(const char *name) +struct net_device *batadv_softif_create(struct net *net, const char *name) { struct net_device *soft_iface; int ret; @@ -985,6 +999,8 @@ struct net_device *batadv_softif_create(const char *name) if (!soft_iface) return NULL; + dev_net_set(soft_iface, net); + soft_iface->rtnl_link_ops = &batadv_link_ops; ret = register_netdevice(soft_iface); @@ -1017,7 +1033,9 @@ void batadv_softif_destroy_sysfs(struct net_device *soft_iface) static void batadv_softif_destroy_netlink(struct net_device *soft_iface, struct list_head *head) { + struct batadv_priv *bat_priv = netdev_priv(soft_iface); struct batadv_hard_iface *hard_iface; + struct batadv_softif_vlan *vlan; list_for_each_entry(hard_iface, &batadv_hardif_list, list) { if (hard_iface->soft_iface == soft_iface) @@ -1025,16 +1043,23 @@ static void batadv_softif_destroy_netlink(struct net_device *soft_iface, BATADV_IF_CLEANUP_KEEP); } + /* destroy the "untagged" VLAN */ + vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS); + if (vlan) { + batadv_softif_destroy_vlan(bat_priv, vlan); + batadv_softif_vlan_put(vlan); + } + batadv_sysfs_del_meshif(soft_iface); unregister_netdevice_queue(soft_iface, head); } -int batadv_softif_is_valid(const struct net_device *net_dev) +bool batadv_softif_is_valid(const struct net_device *net_dev) { if (net_dev->netdev_ops->ndo_start_xmit == batadv_interface_tx) - return 1; + return true; - return 0; + return false; } struct rtnl_link_ops batadv_link_ops __read_mostly = { |