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batman-adv: Add wrapper to look up neighbor and send skb
By adding batadv_send_skb_to_orig() in send.c, we can remove duplicate code that looks up the next hop and then calls batadv_send_skb_packet(). Furthermore, this prepares the upcoming new implementation of fragmentation, which requires the next hop to route packets. Please note that this doesn't entirely remove the next-hop lookup in routing.c and unicast.c, since it is used by the current fragmentation code. Also note that the next-hop info is removed from debug messages in translation-table.c, since it is looked up elsewhere. Signed-off-by: Martin Hundebøll <martin@hundeboll.net> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
This commit is contained in:
Martin Hundebøll
Antonio Quartulli
parent
637fbd1294
commit
bb351ba0bb
@ -285,7 +285,6 @@ static int batadv_recv_my_icmp_packet(struct batadv_priv *bat_priv,
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{
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struct batadv_hard_iface *primary_if = NULL;
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struct batadv_orig_node *orig_node = NULL;
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struct batadv_neigh_node *router = NULL;
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struct batadv_icmp_packet_rr *icmp_packet;
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int ret = NET_RX_DROP;
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@ -307,10 +306,6 @@ static int batadv_recv_my_icmp_packet(struct batadv_priv *bat_priv,
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if (!orig_node)
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goto out;
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router = batadv_orig_node_get_router(orig_node);
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if (!router)
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goto out;
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/* create a copy of the skb, if needed, to modify it. */
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if (skb_cow(skb, ETH_HLEN) < 0)
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goto out;
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@ -322,14 +317,12 @@ static int batadv_recv_my_icmp_packet(struct batadv_priv *bat_priv,
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icmp_packet->msg_type = BATADV_ECHO_REPLY;
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icmp_packet->header.ttl = BATADV_TTL;
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batadv_send_skb_packet(skb, router->if_incoming, router->addr);
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ret = NET_RX_SUCCESS;
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if (batadv_send_skb_to_orig(skb, orig_node, NULL))
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ret = NET_RX_SUCCESS;
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out:
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if (primary_if)
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batadv_hardif_free_ref(primary_if);
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if (router)
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batadv_neigh_node_free_ref(router);
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if (orig_node)
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batadv_orig_node_free_ref(orig_node);
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return ret;
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@ -340,7 +333,6 @@ static int batadv_recv_icmp_ttl_exceeded(struct batadv_priv *bat_priv,
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{
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struct batadv_hard_iface *primary_if = NULL;
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struct batadv_orig_node *orig_node = NULL;
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struct batadv_neigh_node *router = NULL;
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struct batadv_icmp_packet *icmp_packet;
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int ret = NET_RX_DROP;
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@ -362,10 +354,6 @@ static int batadv_recv_icmp_ttl_exceeded(struct batadv_priv *bat_priv,
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if (!orig_node)
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goto out;
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router = batadv_orig_node_get_router(orig_node);
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if (!router)
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goto out;
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/* create a copy of the skb, if needed, to modify it. */
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if (skb_cow(skb, ETH_HLEN) < 0)
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goto out;
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@ -377,14 +365,12 @@ static int batadv_recv_icmp_ttl_exceeded(struct batadv_priv *bat_priv,
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icmp_packet->msg_type = BATADV_TTL_EXCEEDED;
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icmp_packet->header.ttl = BATADV_TTL;
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batadv_send_skb_packet(skb, router->if_incoming, router->addr);
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ret = NET_RX_SUCCESS;
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if (batadv_send_skb_to_orig(skb, orig_node, NULL))
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ret = NET_RX_SUCCESS;
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out:
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if (primary_if)
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batadv_hardif_free_ref(primary_if);
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if (router)
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batadv_neigh_node_free_ref(router);
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if (orig_node)
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batadv_orig_node_free_ref(orig_node);
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return ret;
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@ -398,7 +384,6 @@ int batadv_recv_icmp_packet(struct sk_buff *skb,
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struct batadv_icmp_packet_rr *icmp_packet;
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struct ethhdr *ethhdr;
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struct batadv_orig_node *orig_node = NULL;
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struct batadv_neigh_node *router = NULL;
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int hdr_size = sizeof(struct batadv_icmp_packet);
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int ret = NET_RX_DROP;
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@ -447,10 +432,6 @@ int batadv_recv_icmp_packet(struct sk_buff *skb,
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if (!orig_node)
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goto out;
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router = batadv_orig_node_get_router(orig_node);
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if (!router)
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goto out;
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/* create a copy of the skb, if needed, to modify it. */
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if (skb_cow(skb, ETH_HLEN) < 0)
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goto out;
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@ -461,12 +442,10 @@ int batadv_recv_icmp_packet(struct sk_buff *skb,
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icmp_packet->header.ttl--;
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/* route it */
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batadv_send_skb_packet(skb, router->if_incoming, router->addr);
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ret = NET_RX_SUCCESS;
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if (batadv_send_skb_to_orig(skb, orig_node, recv_if))
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ret = NET_RX_SUCCESS;
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out:
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if (router)
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batadv_neigh_node_free_ref(router);
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if (orig_node)
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batadv_orig_node_free_ref(orig_node);
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return ret;
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@ -882,8 +861,8 @@ static int batadv_route_unicast_packet(struct sk_buff *skb,
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skb->len + ETH_HLEN);
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/* route it */
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batadv_send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr);
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ret = NET_RX_SUCCESS;
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if (batadv_send_skb_to_orig(skb, orig_node, recv_if))
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ret = NET_RX_SUCCESS;
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out:
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if (neigh_node)
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@ -78,6 +78,39 @@ send_skb_err:
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return NET_XMIT_DROP;
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}
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/**
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* batadv_send_skb_to_orig - Lookup next-hop and transmit skb.
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* @skb: Packet to be transmitted.
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* @orig_node: Final destination of the packet.
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* @recv_if: Interface used when receiving the packet (can be NULL).
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*
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* Looks up the best next-hop towards the passed originator and passes the
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* skb on for preparation of MAC header. If the packet originated from this
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* host, NULL can be passed as recv_if and no interface alternating is
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* attempted.
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*
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* Returns TRUE on success; FALSE otherwise.
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*/
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bool batadv_send_skb_to_orig(struct sk_buff *skb,
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struct batadv_orig_node *orig_node,
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struct batadv_hard_iface *recv_if)
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{
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struct batadv_priv *bat_priv = orig_node->bat_priv;
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struct batadv_neigh_node *neigh_node;
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/* batadv_find_router() increases neigh_nodes refcount if found. */
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neigh_node = batadv_find_router(bat_priv, orig_node, recv_if);
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if (!neigh_node)
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return false;
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/* route it */
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batadv_send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr);
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batadv_neigh_node_free_ref(neigh_node);
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return true;
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}
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void batadv_schedule_bat_ogm(struct batadv_hard_iface *hard_iface)
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{
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struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
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@ -23,6 +23,9 @@
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int batadv_send_skb_packet(struct sk_buff *skb,
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struct batadv_hard_iface *hard_iface,
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const uint8_t *dst_addr);
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bool batadv_send_skb_to_orig(struct sk_buff *skb,
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struct batadv_orig_node *orig_node,
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struct batadv_hard_iface *recv_if);
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void batadv_schedule_bat_ogm(struct batadv_hard_iface *hard_iface);
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int batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv,
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const struct sk_buff *skb,
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@ -1642,7 +1642,6 @@ static int batadv_send_tt_request(struct batadv_priv *bat_priv,
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{
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struct sk_buff *skb = NULL;
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struct batadv_tt_query_packet *tt_request;
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struct batadv_neigh_node *neigh_node = NULL;
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struct batadv_hard_iface *primary_if;
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struct batadv_tt_req_node *tt_req_node = NULL;
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int ret = 1;
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@ -1680,23 +1679,15 @@ static int batadv_send_tt_request(struct batadv_priv *bat_priv,
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if (full_table)
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tt_request->flags |= BATADV_TT_FULL_TABLE;
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neigh_node = batadv_orig_node_get_router(dst_orig_node);
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if (!neigh_node)
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goto out;
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batadv_dbg(BATADV_DBG_TT, bat_priv,
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"Sending TT_REQUEST to %pM via %pM [%c]\n",
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dst_orig_node->orig, neigh_node->addr,
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(full_table ? 'F' : '.'));
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batadv_dbg(BATADV_DBG_TT, bat_priv, "Sending TT_REQUEST to %pM [%c]\n",
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dst_orig_node->orig, (full_table ? 'F' : '.'));
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batadv_inc_counter(bat_priv, BATADV_CNT_TT_REQUEST_TX);
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batadv_send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr);
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ret = 0;
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if (batadv_send_skb_to_orig(skb, dst_orig_node, NULL))
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ret = 0;
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out:
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if (neigh_node)
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batadv_neigh_node_free_ref(neigh_node);
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if (primary_if)
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batadv_hardif_free_ref(primary_if);
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if (ret)
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@ -1716,7 +1707,6 @@ batadv_send_other_tt_response(struct batadv_priv *bat_priv,
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{
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struct batadv_orig_node *req_dst_orig_node;
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struct batadv_orig_node *res_dst_orig_node = NULL;
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struct batadv_neigh_node *neigh_node = NULL;
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struct batadv_hard_iface *primary_if = NULL;
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uint8_t orig_ttvn, req_ttvn, ttvn;
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int ret = false;
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@ -1742,10 +1732,6 @@ batadv_send_other_tt_response(struct batadv_priv *bat_priv,
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if (!res_dst_orig_node)
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goto out;
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neigh_node = batadv_orig_node_get_router(res_dst_orig_node);
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if (!neigh_node)
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goto out;
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primary_if = batadv_primary_if_get_selected(bat_priv);
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if (!primary_if)
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goto out;
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@ -1817,14 +1803,13 @@ batadv_send_other_tt_response(struct batadv_priv *bat_priv,
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tt_response->flags |= BATADV_TT_FULL_TABLE;
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batadv_dbg(BATADV_DBG_TT, bat_priv,
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"Sending TT_RESPONSE %pM via %pM for %pM (ttvn: %u)\n",
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res_dst_orig_node->orig, neigh_node->addr,
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req_dst_orig_node->orig, req_ttvn);
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"Sending TT_RESPONSE %pM for %pM (ttvn: %u)\n",
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res_dst_orig_node->orig, req_dst_orig_node->orig, req_ttvn);
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batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX);
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batadv_send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr);
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ret = true;
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if (batadv_send_skb_to_orig(skb, res_dst_orig_node, NULL))
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ret = true;
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goto out;
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unlock:
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@ -1835,8 +1820,6 @@ out:
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batadv_orig_node_free_ref(res_dst_orig_node);
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if (req_dst_orig_node)
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batadv_orig_node_free_ref(req_dst_orig_node);
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if (neigh_node)
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batadv_neigh_node_free_ref(neigh_node);
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if (primary_if)
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batadv_hardif_free_ref(primary_if);
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if (!ret)
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@ -1850,7 +1833,6 @@ batadv_send_my_tt_response(struct batadv_priv *bat_priv,
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struct batadv_tt_query_packet *tt_request)
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{
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struct batadv_orig_node *orig_node;
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struct batadv_neigh_node *neigh_node = NULL;
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struct batadv_hard_iface *primary_if = NULL;
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uint8_t my_ttvn, req_ttvn, ttvn;
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int ret = false;
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@ -1875,10 +1857,6 @@ batadv_send_my_tt_response(struct batadv_priv *bat_priv,
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if (!orig_node)
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goto out;
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neigh_node = batadv_orig_node_get_router(orig_node);
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if (!neigh_node)
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goto out;
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primary_if = batadv_primary_if_get_selected(bat_priv);
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if (!primary_if)
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goto out;
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@ -1942,14 +1920,14 @@ batadv_send_my_tt_response(struct batadv_priv *bat_priv,
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tt_response->flags |= BATADV_TT_FULL_TABLE;
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batadv_dbg(BATADV_DBG_TT, bat_priv,
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"Sending TT_RESPONSE to %pM via %pM [%c]\n",
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orig_node->orig, neigh_node->addr,
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"Sending TT_RESPONSE to %pM [%c]\n",
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orig_node->orig,
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(tt_response->flags & BATADV_TT_FULL_TABLE ? 'F' : '.'));
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batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_TX);
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batadv_send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr);
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ret = true;
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if (batadv_send_skb_to_orig(skb, orig_node, NULL))
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ret = true;
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goto out;
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unlock:
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@ -1957,8 +1935,6 @@ unlock:
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out:
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if (orig_node)
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batadv_orig_node_free_ref(orig_node);
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if (neigh_node)
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batadv_neigh_node_free_ref(neigh_node);
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if (primary_if)
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batadv_hardif_free_ref(primary_if);
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if (!ret)
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@ -2223,7 +2199,6 @@ unlock:
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static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client,
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struct batadv_orig_node *orig_node)
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{
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struct batadv_neigh_node *neigh_node = NULL;
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struct sk_buff *skb = NULL;
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struct batadv_roam_adv_packet *roam_adv_packet;
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int ret = 1;
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@ -2256,23 +2231,17 @@ static void batadv_send_roam_adv(struct batadv_priv *bat_priv, uint8_t *client,
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memcpy(roam_adv_packet->dst, orig_node->orig, ETH_ALEN);
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memcpy(roam_adv_packet->client, client, ETH_ALEN);
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neigh_node = batadv_orig_node_get_router(orig_node);
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if (!neigh_node)
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goto out;
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batadv_dbg(BATADV_DBG_TT, bat_priv,
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"Sending ROAMING_ADV to %pM (client %pM) via %pM\n",
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orig_node->orig, client, neigh_node->addr);
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"Sending ROAMING_ADV to %pM (client %pM)\n",
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orig_node->orig, client);
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batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_TX);
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batadv_send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr);
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ret = 0;
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if (batadv_send_skb_to_orig(skb, orig_node, NULL))
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ret = 0;
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out:
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if (neigh_node)
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batadv_neigh_node_free_ref(neigh_node);
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if (ret)
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if (ret && skb)
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kfree_skb(skb);
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return;
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}
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@ -402,7 +402,7 @@ int batadv_unicast_generic_send_skb(struct batadv_priv *bat_priv,
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struct batadv_orig_node *orig_node;
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struct batadv_neigh_node *neigh_node;
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int data_len = skb->len;
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int ret = 1;
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int ret = NET_RX_DROP;
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unsigned int dev_mtu;
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/* get routing information */
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@ -466,15 +466,15 @@ find_router:
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goto out;
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}
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batadv_send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr);
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ret = 0;
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if (batadv_send_skb_to_orig(skb, orig_node, NULL))
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ret = 0;
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out:
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if (neigh_node)
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batadv_neigh_node_free_ref(neigh_node);
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if (orig_node)
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batadv_orig_node_free_ref(orig_node);
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if (ret == 1)
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if (ret == NET_RX_DROP)
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kfree_skb(skb);
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return ret;
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}
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@ -698,15 +698,12 @@ static void batadv_purge_vis_packets(struct batadv_priv *bat_priv)
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static void batadv_broadcast_vis_packet(struct batadv_priv *bat_priv,
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struct batadv_vis_info *info)
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{
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struct batadv_neigh_node *router;
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struct batadv_hashtable *hash = bat_priv->orig_hash;
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struct hlist_node *node;
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struct hlist_head *head;
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struct batadv_orig_node *orig_node;
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struct batadv_vis_packet *packet;
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struct sk_buff *skb;
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struct batadv_hard_iface *hard_iface;
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uint8_t dstaddr[ETH_ALEN];
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uint32_t i;
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@ -722,30 +719,20 @@ static void batadv_broadcast_vis_packet(struct batadv_priv *bat_priv,
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if (!(orig_node->flags & BATADV_VIS_SERVER))
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continue;
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router = batadv_orig_node_get_router(orig_node);
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if (!router)
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continue;
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/* don't send it if we already received the packet from
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* this node.
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*/
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if (batadv_recv_list_is_in(bat_priv, &info->recv_list,
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orig_node->orig)) {
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batadv_neigh_node_free_ref(router);
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orig_node->orig))
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continue;
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}
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|
||||
memcpy(packet->target_orig, orig_node->orig, ETH_ALEN);
|
||||
hard_iface = router->if_incoming;
|
||||
memcpy(dstaddr, router->addr, ETH_ALEN);
|
||||
|
||||
batadv_neigh_node_free_ref(router);
|
||||
|
||||
skb = skb_clone(info->skb_packet, GFP_ATOMIC);
|
||||
if (skb)
|
||||
batadv_send_skb_packet(skb, hard_iface,
|
||||
dstaddr);
|
||||
if (!skb)
|
||||
continue;
|
||||
|
||||
if (!batadv_send_skb_to_orig(skb, orig_node, NULL))
|
||||
kfree_skb(skb);
|
||||
}
|
||||
rcu_read_unlock();
|
||||
}
|
||||
@ -755,7 +742,6 @@ static void batadv_unicast_vis_packet(struct batadv_priv *bat_priv,
|
||||
struct batadv_vis_info *info)
|
||||
{
|
||||
struct batadv_orig_node *orig_node;
|
||||
struct batadv_neigh_node *router = NULL;
|
||||
struct sk_buff *skb;
|
||||
struct batadv_vis_packet *packet;
|
||||
|
||||
@ -765,17 +751,14 @@ static void batadv_unicast_vis_packet(struct batadv_priv *bat_priv,
|
||||
if (!orig_node)
|
||||
goto out;
|
||||
|
||||
router = batadv_orig_node_get_router(orig_node);
|
||||
if (!router)
|
||||
skb = skb_clone(info->skb_packet, GFP_ATOMIC);
|
||||
if (!skb)
|
||||
goto out;
|
||||
|
||||
skb = skb_clone(info->skb_packet, GFP_ATOMIC);
|
||||
if (skb)
|
||||
batadv_send_skb_packet(skb, router->if_incoming, router->addr);
|
||||
if (!batadv_send_skb_to_orig(skb, orig_node, NULL))
|
||||
kfree_skb(skb);
|
||||
|
||||
out:
|
||||
if (router)
|
||||
batadv_neigh_node_free_ref(router);
|
||||
if (orig_node)
|
||||
batadv_orig_node_free_ref(orig_node);
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user