diff options
Diffstat (limited to 'drivers/staging/batman-adv/hard-interface.c')
| -rw-r--r-- | drivers/staging/batman-adv/hard-interface.c | 154 |
1 files changed, 109 insertions, 45 deletions
diff --git a/drivers/staging/batman-adv/hard-interface.c b/drivers/staging/batman-adv/hard-interface.c index 7c885926b16..cc59c307a42 100644 --- a/drivers/staging/batman-adv/hard-interface.c +++ b/drivers/staging/batman-adv/hard-interface.c @@ -153,9 +153,6 @@ void hardif_deactivate_interface(struct batman_if *batman_if) if (batman_if->if_active != IF_ACTIVE) return; - if (batman_if->raw_sock) - sock_release(batman_if->raw_sock); - /** * batman_if->net_dev has been acquired by dev_get_by_name() in * proc_interfaces_write() and has to be unreferenced. @@ -164,9 +161,6 @@ void hardif_deactivate_interface(struct batman_if *batman_if) if (batman_if->net_dev) dev_put(batman_if->net_dev); - batman_if->raw_sock = NULL; - batman_if->net_dev = NULL; - batman_if->if_active = IF_INACTIVE; active_ifs--; @@ -177,9 +171,6 @@ void hardif_deactivate_interface(struct batman_if *batman_if) /* (re)activate given interface. */ static void hardif_activate_interface(struct batman_if *batman_if) { - struct sockaddr_ll bind_addr; - int retval; - if (batman_if->if_active != IF_INACTIVE) return; @@ -191,35 +182,8 @@ static void hardif_activate_interface(struct batman_if *batman_if) if (!batman_if->net_dev) goto dev_err; - retval = sock_create_kern(PF_PACKET, SOCK_RAW, - __constant_htons(ETH_P_BATMAN), - &batman_if->raw_sock); - - if (retval < 0) { - printk(KERN_ERR "batman-adv:Can't create raw socket: %i\n", - retval); - goto sock_err; - } - - bind_addr.sll_family = AF_PACKET; - bind_addr.sll_ifindex = batman_if->net_dev->ifindex; - bind_addr.sll_protocol = 0; /* is set by the kernel */ - - retval = kernel_bind(batman_if->raw_sock, - (struct sockaddr *)&bind_addr, sizeof(bind_addr)); - - if (retval < 0) { - printk(KERN_ERR "batman-adv:Can't create bind raw socket: %i\n", - retval); - goto bind_err; - } - check_known_mac_addr(batman_if->net_dev->dev_addr); - batman_if->raw_sock->sk->sk_user_data = - batman_if->raw_sock->sk->sk_data_ready; - batman_if->raw_sock->sk->sk_data_ready = batman_data_ready; - addr_to_string(batman_if->addr_str, batman_if->net_dev->dev_addr); memcpy(((struct batman_packet *)(batman_if->packet_buff))->orig, @@ -239,12 +203,7 @@ static void hardif_activate_interface(struct batman_if *batman_if) return; -bind_err: - sock_release(batman_if->raw_sock); -sock_err: - dev_put(batman_if->net_dev); dev_err: - batman_if->raw_sock = NULL; batman_if->net_dev = NULL; } @@ -318,6 +277,7 @@ int hardif_add_interface(char *dev, int if_num) struct batman_if *batman_if; struct batman_packet *batman_packet; struct orig_node *orig_node; + unsigned long flags; HASHIT(hashit); batman_if = kmalloc(sizeof(struct batman_if), GFP_KERNEL); @@ -327,7 +287,6 @@ int hardif_add_interface(char *dev, int if_num) return -1; } - batman_if->raw_sock = NULL; batman_if->net_dev = NULL; if ((if_num == 0) && (num_hna > 0)) @@ -375,17 +334,17 @@ int hardif_add_interface(char *dev, int if_num) /* resize all orig nodes because orig_node->bcast_own(_sum) depend on * if_num */ - spin_lock(&orig_hash_lock); + spin_lock_irqsave(&orig_hash_lock, flags); while (hash_iterate(orig_hash, &hashit)) { orig_node = hashit.bucket->data; if (resize_orig(orig_node, if_num) == -1) { - spin_unlock(&orig_hash_lock); + spin_unlock_irqrestore(&orig_hash_lock, flags); goto out; } } - spin_unlock(&orig_hash_lock); + spin_unlock_irqrestore(&orig_hash_lock, flags); if (!hardif_is_interface_up(batman_if->dev)) printk(KERN_ERR "batman-adv:Not using interface %s (retrying later): interface not active\n", batman_if->dev); @@ -443,6 +402,111 @@ out: return NOTIFY_DONE; } +/* find batman interface by netdev. assumes rcu_read_lock on */ +static struct batman_if *find_batman_if(struct net_device *dev) +{ + struct batman_if *batman_if; + + rcu_read_lock(); + list_for_each_entry_rcu(batman_if, &if_list, list) { + if (batman_if->net_dev == dev) { + rcu_read_unlock(); + return batman_if; + } + } + rcu_read_unlock(); + return NULL; +} + + +/* receive a packet with the batman ethertype coming on a hard + * interface */ +int batman_skb_recv(struct sk_buff *skb, struct net_device *dev, + struct packet_type *ptype, struct net_device *orig_dev) +{ + struct batman_packet *batman_packet; + struct batman_if *batman_if; + struct net_device_stats *stats; + int ret; + + skb = skb_share_check(skb, GFP_ATOMIC); + + if (skb == NULL) + goto err_free; + + /* packet should hold at least type and version */ + if (unlikely(skb_headlen(skb) < 2)) + goto err_free; + + /* expect a valid ethernet header here. */ + if (unlikely(skb->mac_len != sizeof(struct ethhdr) + || !skb_mac_header(skb))) + goto err_free; + + batman_if = find_batman_if(skb->dev); + if (!batman_if) + goto err_free; + + stats = &skb->dev->stats; + stats->rx_packets++; + stats->rx_bytes += skb->len; + + batman_packet = (struct batman_packet *)skb->data; + + if (batman_packet->version != COMPAT_VERSION) { + bat_dbg(DBG_BATMAN, + "Drop packet: incompatible batman version (%i)\n", + batman_packet->version); + goto err_free; + } + + /* all receive handlers return whether they received or reused + * the supplied skb. if not, we have to free the skb. */ + + switch (batman_packet->packet_type) { + /* batman originator packet */ + case BAT_PACKET: + ret = recv_bat_packet(skb, batman_if); + break; + + /* batman icmp packet */ + case BAT_ICMP: + ret = recv_icmp_packet(skb); + break; + + /* unicast packet */ + case BAT_UNICAST: + ret = recv_unicast_packet(skb); + break; + + /* broadcast packet */ + case BAT_BCAST: + ret = recv_bcast_packet(skb); + break; + + /* vis packet */ + case BAT_VIS: + ret = recv_vis_packet(skb); + break; + default: + ret = NET_RX_DROP; + } + if (ret == NET_RX_DROP) + kfree_skb(skb); + + /* return NET_RX_SUCCESS in any case as we + * most probably dropped the packet for + * routing-logical reasons. */ + + return NET_RX_SUCCESS; + +err_free: + kfree_skb(skb); + return NET_RX_DROP; + +} + + struct notifier_block hard_if_notifier = { .notifier_call = hard_if_event, }; |