diff options
Diffstat (limited to 'net/batman-adv/main.c')
| -rw-r--r-- | net/batman-adv/main.c | 89 |
1 files changed, 79 insertions, 10 deletions
diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c index b4aa470bc4a6..f65a222b7b83 100644 --- a/net/batman-adv/main.c +++ b/net/batman-adv/main.c @@ -17,6 +17,8 @@ * 02110-1301, USA */ +#include <linux/crc32c.h> +#include <linux/highmem.h> #include "main.h" #include "sysfs.h" #include "debugfs.h" @@ -29,6 +31,7 @@ #include "hard-interface.h" #include "gateway_client.h" #include "bridge_loop_avoidance.h" +#include "distributed-arp-table.h" #include "vis.h" #include "hash.h" #include "bat_algo.h" @@ -128,6 +131,10 @@ int batadv_mesh_init(struct net_device *soft_iface) if (ret < 0) goto err; + ret = batadv_dat_init(bat_priv); + if (ret < 0) + goto err; + atomic_set(&bat_priv->gw.reselect, 0); atomic_set(&bat_priv->mesh_state, BATADV_MESH_ACTIVE); @@ -155,21 +162,13 @@ void batadv_mesh_free(struct net_device *soft_iface) batadv_bla_free(bat_priv); + batadv_dat_free(bat_priv); + free_percpu(bat_priv->bat_counters); atomic_set(&bat_priv->mesh_state, BATADV_MESH_INACTIVE); } -void batadv_inc_module_count(void) -{ - try_module_get(THIS_MODULE); -} - -void batadv_dec_module_count(void) -{ - module_put(THIS_MODULE); -} - int batadv_is_my_mac(const uint8_t *addr) { const struct batadv_hard_iface *hard_iface; @@ -188,6 +187,42 @@ int batadv_is_my_mac(const uint8_t *addr) return 0; } +/** + * batadv_seq_print_text_primary_if_get - called from debugfs table printing + * function that requires the primary interface + * @seq: debugfs table seq_file struct + * + * Returns primary interface if found or NULL otherwise. + */ +struct batadv_hard_iface * +batadv_seq_print_text_primary_if_get(struct seq_file *seq) +{ + struct net_device *net_dev = (struct net_device *)seq->private; + struct batadv_priv *bat_priv = netdev_priv(net_dev); + struct batadv_hard_iface *primary_if; + + primary_if = batadv_primary_if_get_selected(bat_priv); + + if (!primary_if) { + seq_printf(seq, + "BATMAN mesh %s disabled - please specify interfaces to enable it\n", + net_dev->name); + goto out; + } + + if (primary_if->if_status == BATADV_IF_ACTIVE) + goto out; + + seq_printf(seq, + "BATMAN mesh %s disabled - primary interface not active\n", + net_dev->name); + batadv_hardif_free_ref(primary_if); + primary_if = NULL; + +out: + return primary_if; +} + static int batadv_recv_unhandled_packet(struct sk_buff *skb, struct batadv_hard_iface *recv_if) { @@ -274,6 +309,8 @@ static void batadv_recv_handler_init(void) /* batman icmp packet */ batadv_rx_handler[BATADV_ICMP] = batadv_recv_icmp_packet; + /* unicast with 4 addresses packet */ + batadv_rx_handler[BATADV_UNICAST_4ADDR] = batadv_recv_unicast_packet; /* unicast packet */ batadv_rx_handler[BATADV_UNICAST] = batadv_recv_unicast_packet; /* fragmented unicast packet */ @@ -385,6 +422,38 @@ int batadv_algo_seq_print_text(struct seq_file *seq, void *offset) return 0; } +/** + * batadv_skb_crc32 - calculate CRC32 of the whole packet and skip bytes in + * the header + * @skb: skb pointing to fragmented socket buffers + * @payload_ptr: Pointer to position inside the head buffer of the skb + * marking the start of the data to be CRC'ed + * + * payload_ptr must always point to an address in the skb head buffer and not to + * a fragment. + */ +__be32 batadv_skb_crc32(struct sk_buff *skb, u8 *payload_ptr) +{ + u32 crc = 0; + unsigned int from; + unsigned int to = skb->len; + struct skb_seq_state st; + const u8 *data; + unsigned int len; + unsigned int consumed = 0; + + from = (unsigned int)(payload_ptr - skb->data); + + skb_prepare_seq_read(skb, from, to, &st); + while ((len = skb_seq_read(consumed, &data, &st)) != 0) { + crc = crc32c(crc, data, len); + consumed += len; + } + skb_abort_seq_read(&st); + + return htonl(crc); +} + static int batadv_param_set_ra(const char *val, const struct kernel_param *kp) { struct batadv_algo_ops *bat_algo_ops; |