diff options
| -rw-r--r-- | net/batman-adv/main.c | 20 | ||||
| -rw-r--r-- | net/batman-adv/packet.h | 31 | ||||
| -rw-r--r-- | net/batman-adv/routing.c | 28 | ||||
| -rw-r--r-- | net/batman-adv/routing.h | 2 |
4 files changed, 68 insertions, 13 deletions
diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c index b22368e66895..8b195e63e70e 100644 --- a/net/batman-adv/main.c +++ b/net/batman-adv/main.c @@ -393,6 +393,9 @@ static void batadv_recv_handler_init(void) for (i = 0; i < ARRAY_SIZE(batadv_rx_handler); i++) batadv_rx_handler[i] = batadv_recv_unhandled_packet; + for (i = BATADV_UNICAST_MIN; i <= BATADV_UNICAST_MAX; i++) + batadv_rx_handler[i] = batadv_recv_unhandled_unicast_packet; + /* compile time checks for struct member offsets */ BUILD_BUG_ON(offsetof(struct batadv_unicast_4addr_packet, src) != 10); BUILD_BUG_ON(offsetof(struct batadv_unicast_packet, dest) != 4); @@ -401,18 +404,20 @@ static void batadv_recv_handler_init(void) BUILD_BUG_ON(offsetof(struct batadv_icmp_packet, dst) != 4); BUILD_BUG_ON(offsetof(struct batadv_icmp_packet_rr, dst) != 4); - /* batman icmp packet */ - batadv_rx_handler[BATADV_ICMP] = batadv_recv_icmp_packet; + /* broadcast packet */ + batadv_rx_handler[BATADV_BCAST] = batadv_recv_bcast_packet; + + /* unicast packets ... */ /* 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 */ batadv_rx_handler[BATADV_UNICAST_FRAG] = batadv_recv_ucast_frag_packet; - /* broadcast packet */ - batadv_rx_handler[BATADV_BCAST] = batadv_recv_bcast_packet; /* unicast tvlv packet */ batadv_rx_handler[BATADV_UNICAST_TVLV] = batadv_recv_unicast_tvlv; + /* batman icmp packet */ + batadv_rx_handler[BATADV_ICMP] = batadv_recv_icmp_packet; } int @@ -420,7 +425,12 @@ batadv_recv_handler_register(uint8_t packet_type, int (*recv_handler)(struct sk_buff *, struct batadv_hard_iface *)) { - if (batadv_rx_handler[packet_type] != &batadv_recv_unhandled_packet) + int (*curr)(struct sk_buff *, + struct batadv_hard_iface *); + curr = batadv_rx_handler[packet_type]; + + if ((curr != batadv_recv_unhandled_packet) && + (curr != batadv_recv_unhandled_unicast_packet)) return -EBUSY; batadv_rx_handler[packet_type] = recv_handler; diff --git a/net/batman-adv/packet.h b/net/batman-adv/packet.h index 87fcf2e7883c..f02dbb1892dd 100644 --- a/net/batman-adv/packet.h +++ b/net/batman-adv/packet.h @@ -22,17 +22,32 @@ /** * enum batadv_packettype - types for batman-adv encapsulated packets + * @BATADV_IV_OGM: originator messages for B.A.T.M.A.N. IV + * @BATADV_BCAST: broadcast packets carrying broadcast payload + * @BATADV_CODED: network coded packets + * + * @BATADV_UNICAST: unicast packets carrying unicast payload traffic + * @BATADV_UNICAST_FRAG: unicast packets carrying a fragment of the original + * payload packet + * @BATADV_UNICAST_4ADDR: unicast packet including the originator address of + * the sender + * @BATADV_ICMP: unicast packet like IP ICMP used for ping or traceroute * @BATADV_UNICAST_TVLV: unicast packet carrying TVLV containers */ enum batadv_packettype { - BATADV_IV_OGM = 0x01, - BATADV_ICMP = 0x02, - BATADV_UNICAST = 0x03, - BATADV_BCAST = 0x04, - BATADV_UNICAST_FRAG = 0x06, - BATADV_UNICAST_4ADDR = 0x09, - BATADV_CODED = 0x0a, - BATADV_UNICAST_TVLV = 0x0b, + /* 0x00 - 0x3f: local packets or special rules for handling */ + BATADV_IV_OGM = 0x00, + BATADV_BCAST = 0x01, + BATADV_CODED = 0x02, + /* 0x40 - 0x7f: unicast */ +#define BATADV_UNICAST_MIN 0x40 + BATADV_UNICAST = 0x40, + BATADV_UNICAST_FRAG = 0x41, + BATADV_UNICAST_4ADDR = 0x42, + BATADV_ICMP = 0x43, + BATADV_UNICAST_TVLV = 0x44, +#define BATADV_UNICAST_MAX 0x7f + /* 0x80 - 0xff: reserved */ }; /** diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c index 2a9318bd9026..457dfef9c5fc 100644 --- a/net/batman-adv/routing.c +++ b/net/batman-adv/routing.c @@ -911,6 +911,34 @@ static int batadv_check_unicast_ttvn(struct batadv_priv *bat_priv, return 1; } +/** + * batadv_recv_unhandled_unicast_packet - receive and process packets which + * are in the unicast number space but not yet known to the implementation + * @skb: unicast tvlv packet to process + * @recv_if: pointer to interface this packet was received on + * + * Returns NET_RX_SUCCESS if the packet has been consumed or NET_RX_DROP + * otherwise. + */ +int batadv_recv_unhandled_unicast_packet(struct sk_buff *skb, + struct batadv_hard_iface *recv_if) +{ + struct batadv_unicast_packet *unicast_packet; + struct batadv_priv *bat_priv = netdev_priv(recv_if->soft_iface); + int check, hdr_size = sizeof(*unicast_packet); + + check = batadv_check_unicast_packet(bat_priv, skb, hdr_size); + if (check < 0) + return NET_RX_DROP; + + /* we don't know about this type, drop it. */ + unicast_packet = (struct batadv_unicast_packet *)skb->data; + if (batadv_is_my_mac(bat_priv, unicast_packet->dest)) + return NET_RX_DROP; + + return batadv_route_unicast_packet(skb, recv_if); +} + int batadv_recv_unicast_packet(struct sk_buff *skb, struct batadv_hard_iface *recv_if) { diff --git a/net/batman-adv/routing.h b/net/batman-adv/routing.h index b3f53d492b3c..ea15fa6302ad 100644 --- a/net/batman-adv/routing.h +++ b/net/batman-adv/routing.h @@ -40,6 +40,8 @@ int batadv_recv_roam_adv(struct sk_buff *skb, struct batadv_hard_iface *recv_if); int batadv_recv_unicast_tvlv(struct sk_buff *skb, struct batadv_hard_iface *recv_if); +int batadv_recv_unhandled_unicast_packet(struct sk_buff *skb, + struct batadv_hard_iface *recv_if); struct batadv_neigh_node * batadv_find_router(struct batadv_priv *bat_priv, struct batadv_orig_node *orig_node, |