batman-adv: Remove old fragmentation code
authorMartin Hundebøll <martin@hundeboll.net>
Thu, 23 May 2013 14:53:01 +0000 (16:53 +0200)
committerAntonio Quartulli <antonio@meshcoding.com>
Sat, 12 Oct 2013 09:58:33 +0000 (11:58 +0200)
Remove the existing fragmentation code before adding the new version
and delete unicast.{h,c}.

batadv_unicast_send_skb() is moved to send.c and renamed to
batadv_send_skb_unicast().

fragmentation entry in sysfs (bat_priv->fragmentation) is kept for use in
the new fragmentation code.

BATADV_UNICAST_FRAG packet type is renamed to BATADV_FRAG for use in the
new fragmentation code.

Signed-off-by: Martin Hundebøll <martin@hundeboll.net>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
14 files changed:
net/batman-adv/Makefile
net/batman-adv/distributed-arp-table.c
net/batman-adv/hard-interface.c
net/batman-adv/main.c
net/batman-adv/originator.c
net/batman-adv/packet.h
net/batman-adv/routing.c
net/batman-adv/routing.h
net/batman-adv/send.c
net/batman-adv/send.h
net/batman-adv/soft-interface.c
net/batman-adv/types.h
net/batman-adv/unicast.c [deleted file]
net/batman-adv/unicast.h [deleted file]

index 8ddbfe6..f9b465b 100644 (file)
@@ -37,4 +37,3 @@ batman-adv-y += send.o
 batman-adv-y += soft-interface.o
 batman-adv-y += sysfs.o
 batman-adv-y += translation-table.o
-batman-adv-y += unicast.o
index f07ec32..99da412 100644 (file)
@@ -29,7 +29,6 @@
 #include "send.h"
 #include "types.h"
 #include "translation-table.h"
-#include "unicast.h"
 
 static void batadv_dat_purge(struct work_struct *work);
 
@@ -592,9 +591,9 @@ static bool batadv_dat_send_data(struct batadv_priv *bat_priv,
                        goto free_orig;
 
                tmp_skb = pskb_copy(skb, GFP_ATOMIC);
-               if (!batadv_unicast_4addr_prepare_skb(bat_priv, tmp_skb,
-                                                     cand[i].orig_node,
-                                                     packet_subtype)) {
+               if (!batadv_send_skb_prepare_unicast_4addr(bat_priv, tmp_skb,
+                                                          cand[i].orig_node,
+                                                          packet_subtype)) {
                        kfree_skb(tmp_skb);
                        goto free_neigh;
                }
@@ -990,10 +989,10 @@ bool batadv_dat_snoop_incoming_arp_request(struct batadv_priv *bat_priv,
         * that a node not using the 4addr packet format doesn't support it.
         */
        if (hdr_size == sizeof(struct batadv_unicast_4addr_packet))
-               err = batadv_unicast_4addr_send_skb(bat_priv, skb_new,
+               err = batadv_send_skb_unicast_4addr(bat_priv, skb_new,
                                                    BATADV_P_DAT_CACHE_REPLY);
        else
-               err = batadv_unicast_send_skb(bat_priv, skb_new);
+               err = batadv_send_skb_unicast(bat_priv, skb_new);
 
        if (!err) {
                batadv_inc_counter(bat_priv, BATADV_CNT_DAT_CACHED_REPLY_TX);
index eeb6671..0c8602e 100644 (file)
@@ -444,7 +444,6 @@ int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface,
        hard_iface->batman_adv_ptype.dev = hard_iface->net_dev;
        dev_add_pack(&hard_iface->batman_adv_ptype);
 
-       atomic_set(&hard_iface->frag_seqno, 1);
        batadv_info(hard_iface->soft_iface, "Adding interface: %s\n",
                    hard_iface->net_dev->name);
 
index 8b195e6..8822fad 100644 (file)
@@ -36,7 +36,6 @@
 #include "gateway_client.h"
 #include "bridge_loop_avoidance.h"
 #include "distributed-arp-table.h"
-#include "unicast.h"
 #include "gateway_common.h"
 #include "hash.h"
 #include "bat_algo.h"
@@ -399,7 +398,6 @@ static void batadv_recv_handler_init(void)
        /* 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);
-       BUILD_BUG_ON(offsetof(struct batadv_unicast_frag_packet, dest) != 4);
        BUILD_BUG_ON(offsetof(struct batadv_unicast_tvlv_packet, dst) != 4);
        BUILD_BUG_ON(offsetof(struct batadv_icmp_packet, dst) != 4);
        BUILD_BUG_ON(offsetof(struct batadv_icmp_packet_rr, dst) != 4);
@@ -412,8 +410,6 @@ static void batadv_recv_handler_init(void)
        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;
        /* unicast tvlv packet */
        batadv_rx_handler[BATADV_UNICAST_TVLV] = batadv_recv_unicast_tvlv;
        /* batman icmp packet */
index 5d53d2f..898b0ce 100644 (file)
@@ -25,7 +25,6 @@
 #include "routing.h"
 #include "gateway_client.h"
 #include "hard-interface.h"
-#include "unicast.h"
 #include "soft-interface.h"
 #include "bridge_loop_avoidance.h"
 #include "network-coding.h"
@@ -146,7 +145,6 @@ static void batadv_orig_node_free_rcu(struct rcu_head *rcu)
        /* Free nc_nodes */
        batadv_nc_purge_orig(orig_node->bat_priv, orig_node, NULL);
 
-       batadv_frag_list_free(&orig_node->frag_list);
        batadv_tt_global_del_orig(orig_node->bat_priv, orig_node,
                                  "originator timed out");
 
@@ -269,9 +267,6 @@ struct batadv_orig_node *batadv_get_orig_node(struct batadv_priv *bat_priv,
        size = bat_priv->num_ifaces * sizeof(uint8_t);
        orig_node->bcast_own_sum = kzalloc(size, GFP_ATOMIC);
 
-       INIT_LIST_HEAD(&orig_node->frag_list);
-       orig_node->last_frag_packet = 0;
-
        if (!orig_node->bcast_own_sum)
                goto free_bcast_own;
 
@@ -393,10 +388,6 @@ static void _batadv_purge_orig(struct batadv_priv *bat_priv)
                                batadv_orig_node_free_ref(orig_node);
                                continue;
                        }
-
-                       if (batadv_has_timed_out(orig_node->last_frag_packet,
-                                                BATADV_FRAG_TIMEOUT))
-                               batadv_frag_list_free(&orig_node->frag_list);
                }
                spin_unlock_bh(list_lock);
        }
index 4361bae..5e3b102 100644 (file)
@@ -91,12 +91,6 @@ enum batadv_icmp_packettype {
        BATADV_PARAMETER_PROBLEM       = 12,
 };
 
-/* fragmentation defines */
-enum batadv_unicast_frag_flags {
-       BATADV_UNI_FRAG_HEAD      = BIT(0),
-       BATADV_UNI_FRAG_LARGETAIL = BIT(1),
-};
-
 /* tt data subtypes */
 #define BATADV_TT_DATA_TYPE_MASK 0x0F
 
@@ -255,16 +249,6 @@ struct batadv_unicast_4addr_packet {
         */
 };
 
-struct batadv_unicast_frag_packet {
-       struct batadv_header header;
-       uint8_t  ttvn; /* destination translation table version number */
-       uint8_t  dest[ETH_ALEN];
-       uint8_t  flags;
-       uint8_t  align;
-       uint8_t  orig[ETH_ALEN];
-       __be16   seqno;
-} __packed;
-
 struct batadv_bcast_packet {
        struct batadv_header header;
        uint8_t  reserved;
index 0dc1c0e..fd2cdbc 100644 (file)
@@ -25,7 +25,6 @@
 #include "icmp_socket.h"
 #include "translation-table.h"
 #include "originator.h"
-#include "unicast.h"
 #include "bridge_loop_avoidance.h"
 #include "distributed-arp-table.h"
 #include "network-coding.h"
@@ -653,11 +652,9 @@ static int batadv_route_unicast_packet(struct sk_buff *skb,
 {
        struct batadv_priv *bat_priv = netdev_priv(recv_if->soft_iface);
        struct batadv_orig_node *orig_node = NULL;
-       struct batadv_neigh_node *neigh_node = NULL;
        struct batadv_unicast_packet *unicast_packet;
        struct ethhdr *ethhdr = eth_hdr(skb);
        int res, hdr_len, ret = NET_RX_DROP;
-       struct sk_buff *new_skb;
 
        unicast_packet = (struct batadv_unicast_packet *)skb->data;
 
@@ -674,46 +671,12 @@ static int batadv_route_unicast_packet(struct sk_buff *skb,
        if (!orig_node)
                goto out;
 
-       /* find_router() increases neigh_nodes refcount if found. */
-       neigh_node = batadv_find_router(bat_priv, orig_node, recv_if);
-
-       if (!neigh_node)
-               goto out;
-
        /* create a copy of the skb, if needed, to modify it. */
        if (skb_cow(skb, ETH_HLEN) < 0)
                goto out;
 
-       unicast_packet = (struct batadv_unicast_packet *)skb->data;
-
-       if (unicast_packet->header.packet_type == BATADV_UNICAST &&
-           atomic_read(&bat_priv->fragmentation) &&
-           skb->len > neigh_node->if_incoming->net_dev->mtu) {
-               ret = batadv_frag_send_skb(skb, bat_priv,
-                                          neigh_node->if_incoming,
-                                          neigh_node->addr);
-               goto out;
-       }
-
-       if (unicast_packet->header.packet_type == BATADV_UNICAST_FRAG &&
-           batadv_frag_can_reassemble(skb,
-                                      neigh_node->if_incoming->net_dev->mtu)) {
-               ret = batadv_frag_reassemble_skb(skb, bat_priv, &new_skb);
-
-               if (ret == NET_RX_DROP)
-                       goto out;
-
-               /* packet was buffered for late merge */
-               if (!new_skb) {
-                       ret = NET_RX_SUCCESS;
-                       goto out;
-               }
-
-               skb = new_skb;
-               unicast_packet = (struct batadv_unicast_packet *)skb->data;
-       }
-
        /* decrement ttl */
+       unicast_packet = (struct batadv_unicast_packet *)skb->data;
        unicast_packet->header.ttl--;
 
        switch (unicast_packet->header.packet_type) {
@@ -748,8 +711,6 @@ static int batadv_route_unicast_packet(struct sk_buff *skb,
        }
 
 out:
-       if (neigh_node)
-               batadv_neigh_node_free_ref(neigh_node);
        if (orig_node)
                batadv_orig_node_free_ref(orig_node);
        return ret;
@@ -1003,51 +964,6 @@ rx_success:
        return batadv_route_unicast_packet(skb, recv_if);
 }
 
-int batadv_recv_ucast_frag_packet(struct sk_buff *skb,
-                                 struct batadv_hard_iface *recv_if)
-{
-       struct batadv_priv *bat_priv = netdev_priv(recv_if->soft_iface);
-       struct batadv_unicast_frag_packet *unicast_packet;
-       int hdr_size = sizeof(*unicast_packet);
-       struct sk_buff *new_skb = NULL;
-       int ret;
-
-       if (batadv_check_unicast_packet(bat_priv, skb, hdr_size) < 0)
-               return NET_RX_DROP;
-
-       if (!batadv_check_unicast_ttvn(bat_priv, skb, hdr_size))
-               return NET_RX_DROP;
-
-       unicast_packet = (struct batadv_unicast_frag_packet *)skb->data;
-
-       /* packet for me */
-       if (batadv_is_my_mac(bat_priv, unicast_packet->dest)) {
-               ret = batadv_frag_reassemble_skb(skb, bat_priv, &new_skb);
-
-               if (ret == NET_RX_DROP)
-                       return NET_RX_DROP;
-
-               /* packet was buffered for late merge */
-               if (!new_skb)
-                       return NET_RX_SUCCESS;
-
-               if (batadv_dat_snoop_incoming_arp_request(bat_priv, new_skb,
-                                                         hdr_size))
-                       goto rx_success;
-               if (batadv_dat_snoop_incoming_arp_reply(bat_priv, new_skb,
-                                                       hdr_size))
-                       goto rx_success;
-
-               batadv_interface_rx(recv_if->soft_iface, new_skb, recv_if,
-                                   sizeof(struct batadv_unicast_packet), NULL);
-
-rx_success:
-               return NET_RX_SUCCESS;
-       }
-
-       return batadv_route_unicast_packet(skb, recv_if);
-}
-
 /**
  * batadv_recv_unicast_tvlv - receive and process unicast tvlv packets
  * @skb: unicast tvlv packet to process
index ea15fa6..efab583 100644 (file)
@@ -30,8 +30,6 @@ int batadv_recv_icmp_packet(struct sk_buff *skb,
                            struct batadv_hard_iface *recv_if);
 int batadv_recv_unicast_packet(struct sk_buff *skb,
                               struct batadv_hard_iface *recv_if);
-int batadv_recv_ucast_frag_packet(struct sk_buff *skb,
-                                 struct batadv_hard_iface *recv_if);
 int batadv_recv_bcast_packet(struct sk_buff *skb,
                             struct batadv_hard_iface *recv_if);
 int batadv_recv_tt_query(struct sk_buff *skb,
index 81d69fb..b8356ec 100644 (file)
@@ -25,6 +25,7 @@
 #include "soft-interface.h"
 #include "hard-interface.h"
 #include "gateway_common.h"
+#include "gateway_client.h"
 #include "originator.h"
 #include "network-coding.h"
 
@@ -127,6 +128,179 @@ int batadv_send_skb_to_orig(struct sk_buff *skb,
        return ret;
 }
 
+/**
+ * batadv_send_skb_push_fill_unicast - extend the buffer and initialize the
+ *  common fields for unicast packets
+ * @skb: the skb carrying the unicast header to initialize
+ * @hdr_size: amount of bytes to push at the beginning of the skb
+ * @orig_node: the destination node
+ *
+ * Returns false if the buffer extension was not possible or true otherwise.
+ */
+static bool
+batadv_send_skb_push_fill_unicast(struct sk_buff *skb, int hdr_size,
+                                 struct batadv_orig_node *orig_node)
+{
+       struct batadv_unicast_packet *unicast_packet;
+       uint8_t ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn);
+
+       if (batadv_skb_head_push(skb, hdr_size) < 0)
+               return false;
+
+       unicast_packet = (struct batadv_unicast_packet *)skb->data;
+       unicast_packet->header.version = BATADV_COMPAT_VERSION;
+       /* batman packet type: unicast */
+       unicast_packet->header.packet_type = BATADV_UNICAST;
+       /* set unicast ttl */
+       unicast_packet->header.ttl = BATADV_TTL;
+       /* copy the destination for faster routing */
+       memcpy(unicast_packet->dest, orig_node->orig, ETH_ALEN);
+       /* set the destination tt version number */
+       unicast_packet->ttvn = ttvn;
+
+       return true;
+}
+
+/**
+ * batadv_send_skb_prepare_unicast - encapsulate an skb with a unicast header
+ * @skb: the skb containing the payload to encapsulate
+ * @orig_node: the destination node
+ *
+ * Returns false if the payload could not be encapsulated or true otherwise.
+ */
+static bool batadv_send_skb_prepare_unicast(struct sk_buff *skb,
+                                           struct batadv_orig_node *orig_node)
+{
+       size_t uni_size = sizeof(struct batadv_unicast_packet);
+
+       return batadv_send_skb_push_fill_unicast(skb, uni_size, orig_node);
+}
+
+/**
+ * batadv_send_skb_prepare_unicast_4addr - encapsulate an skb with a
+ *  unicast 4addr header
+ * @bat_priv: the bat priv with all the soft interface information
+ * @skb: the skb containing the payload to encapsulate
+ * @orig_node: the destination node
+ * @packet_subtype: the unicast 4addr packet subtype to use
+ *
+ * Returns false if the payload could not be encapsulated or true otherwise.
+ */
+bool batadv_send_skb_prepare_unicast_4addr(struct batadv_priv *bat_priv,
+                                          struct sk_buff *skb,
+                                          struct batadv_orig_node *orig,
+                                          int packet_subtype)
+{
+       struct batadv_hard_iface *primary_if;
+       struct batadv_unicast_4addr_packet *uc_4addr_packet;
+       bool ret = false;
+
+       primary_if = batadv_primary_if_get_selected(bat_priv);
+       if (!primary_if)
+               goto out;
+
+       /* Pull the header space and fill the unicast_packet substructure.
+        * We can do that because the first member of the uc_4addr_packet
+        * is of type struct unicast_packet
+        */
+       if (!batadv_send_skb_push_fill_unicast(skb, sizeof(*uc_4addr_packet),
+                                              orig))
+               goto out;
+
+       uc_4addr_packet = (struct batadv_unicast_4addr_packet *)skb->data;
+       uc_4addr_packet->u.header.packet_type = BATADV_UNICAST_4ADDR;
+       memcpy(uc_4addr_packet->src, primary_if->net_dev->dev_addr, ETH_ALEN);
+       uc_4addr_packet->subtype = packet_subtype;
+       uc_4addr_packet->reserved = 0;
+
+       ret = true;
+out:
+       if (primary_if)
+               batadv_hardif_free_ref(primary_if);
+       return ret;
+}
+
+/**
+ * batadv_send_generic_unicast_skb - send an skb as unicast
+ * @bat_priv: the bat priv with all the soft interface information
+ * @skb: payload to send
+ * @packet_type: the batman unicast packet type to use
+ * @packet_subtype: the unicast 4addr packet subtype (only relevant for unicast
+ *  4addr packets)
+ *
+ * Returns 1 in case of error or 0 otherwise.
+ */
+int batadv_send_skb_generic_unicast(struct batadv_priv *bat_priv,
+                                   struct sk_buff *skb, int packet_type,
+                                   int packet_subtype)
+{
+       struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
+       struct batadv_unicast_packet *unicast_packet;
+       struct batadv_orig_node *orig_node;
+       struct batadv_neigh_node *neigh_node;
+       int ret = NET_RX_DROP;
+
+       /* get routing information */
+       if (is_multicast_ether_addr(ethhdr->h_dest)) {
+               orig_node = batadv_gw_get_selected_orig(bat_priv);
+               if (orig_node)
+                       goto find_router;
+       }
+
+       /* check for tt host - increases orig_node refcount.
+        * returns NULL in case of AP isolation
+        */
+       orig_node = batadv_transtable_search(bat_priv, ethhdr->h_source,
+                                            ethhdr->h_dest);
+
+find_router:
+       /* find_router():
+        *  - if orig_node is NULL it returns NULL
+        *  - increases neigh_nodes refcount if found.
+        */
+       neigh_node = batadv_find_router(bat_priv, orig_node, NULL);
+
+       if (!neigh_node)
+               goto out;
+
+       switch (packet_type) {
+       case BATADV_UNICAST:
+               batadv_send_skb_prepare_unicast(skb, orig_node);
+               break;
+       case BATADV_UNICAST_4ADDR:
+               batadv_send_skb_prepare_unicast_4addr(bat_priv, skb, orig_node,
+                                                     packet_subtype);
+               break;
+       default:
+               /* this function supports UNICAST and UNICAST_4ADDR only. It
+                * should never be invoked with any other packet type
+                */
+               goto out;
+       }
+
+       unicast_packet = (struct batadv_unicast_packet *)skb->data;
+
+       /* inform the destination node that we are still missing a correct route
+        * for this client. The destination will receive this packet and will
+        * try to reroute it because the ttvn contained in the header is less
+        * than the current one
+        */
+       if (batadv_tt_global_client_is_roaming(bat_priv, ethhdr->h_dest))
+               unicast_packet->ttvn = unicast_packet->ttvn - 1;
+
+       if (batadv_send_skb_to_orig(skb, orig_node, NULL) != NET_XMIT_DROP)
+               ret = 0;
+
+out:
+       if (neigh_node)
+               batadv_neigh_node_free_ref(neigh_node);
+       if (orig_node)
+               batadv_orig_node_free_ref(orig_node);
+       if (ret == NET_RX_DROP)
+               kfree_skb(skb);
+       return ret;
+}
+
 void batadv_schedule_bat_ogm(struct batadv_hard_iface *hard_iface)
 {
        struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
index e7b1788..ad63184 100644 (file)
@@ -34,5 +34,45 @@ void batadv_send_outstanding_bat_ogm_packet(struct work_struct *work);
 void
 batadv_purge_outstanding_packets(struct batadv_priv *bat_priv,
                                 const struct batadv_hard_iface *hard_iface);
+bool batadv_send_skb_prepare_unicast_4addr(struct batadv_priv *bat_priv,
+                                          struct sk_buff *skb,
+                                          struct batadv_orig_node *orig_node,
+                                          int packet_subtype);
+int batadv_send_skb_generic_unicast(struct batadv_priv *bat_priv,
+                                   struct sk_buff *skb, int packet_type,
+                                   int packet_subtype);
+
+
+/**
+ * batadv_send_unicast_skb - send the skb encapsulated in a unicast packet
+ * @bat_priv: the bat priv with all the soft interface information
+ * @skb: the payload to send
+ *
+ * Returns 1 in case of error or 0 otherwise.
+ */
+static inline int batadv_send_skb_unicast(struct batadv_priv *bat_priv,
+                                         struct sk_buff *skb)
+{
+       return batadv_send_skb_generic_unicast(bat_priv, skb, BATADV_UNICAST,
+                                              0);
+}
+
+/**
+ * batadv_send_4addr_unicast_skb - send the skb encapsulated in a unicast 4addr
+ *  packet
+ * @bat_priv: the bat priv with all the soft interface information
+ * @skb: the payload to send
+ * @packet_subtype: the unicast 4addr packet subtype to use
+ *
+ * Returns 1 in case of error or 0 otherwise.
+ */
+static inline int batadv_send_skb_unicast_4addr(struct batadv_priv *bat_priv,
+                                               struct sk_buff *skb,
+                                               int packet_subtype)
+{
+       return batadv_send_skb_generic_unicast(bat_priv, skb,
+                                              BATADV_UNICAST_4ADDR,
+                                              packet_subtype);
+}
 
 #endif /* _NET_BATMAN_ADV_SEND_H_ */
index 25e6004..504d0bb 100644 (file)
@@ -34,8 +34,6 @@
 #include <linux/ethtool.h>
 #include <linux/etherdevice.h>
 #include <linux/if_vlan.h>
-#include <linux/if_ether.h>
-#include "unicast.h"
 #include "bridge_loop_avoidance.h"
 #include "network-coding.h"
 
@@ -286,7 +284,7 @@ static int batadv_interface_tx(struct sk_buff *skb,
 
                batadv_dat_snoop_outgoing_arp_reply(bat_priv, skb);
 
-               ret = batadv_unicast_send_skb(bat_priv, skb);
+               ret = batadv_send_skb_unicast(bat_priv, skb);
                if (ret != 0)
                        goto dropped_freed;
        }
index 8fbd89d..795a079 100644 (file)
@@ -60,7 +60,6 @@ struct batadv_hard_iface_bat_iv {
  * @if_num: identificator of the interface
  * @if_status: status of the interface for batman-adv
  * @net_dev: pointer to the net_device
- * @frag_seqno: last fragment sequence number sent by this interface
  * @num_bcasts: number of payload re-broadcasts on this interface (ARQ)
  * @hardif_obj: kobject of the per interface sysfs "mesh" directory
  * @refcount: number of contexts the object is used
@@ -76,7 +75,6 @@ struct batadv_hard_iface {
        int16_t if_num;
        char if_status;
        struct net_device *net_dev;
-       atomic_t frag_seqno;
        uint8_t num_bcasts;
        struct kobject *hardif_obj;
        atomic_t refcount;
@@ -116,9 +114,6 @@ struct batadv_hard_iface {
  *  last_bcast_seqno)
  * @last_bcast_seqno: last broadcast sequence number received by this host
  * @neigh_list: list of potential next hop neighbor towards this orig node
- * @frag_list: fragmentation buffer list for fragment re-assembly
- * @last_frag_packet: time when last fragmented packet from this node was
- *  received
  * @neigh_list_lock: lock protecting neigh_list, router and bonding_list
  * @hash_entry: hlist node for batadv_priv::orig_hash
  * @bat_priv: pointer to soft_iface this orig node belongs to
@@ -159,8 +154,6 @@ struct batadv_orig_node {
        DECLARE_BITMAP(bcast_bits, BATADV_TQ_LOCAL_WINDOW_SIZE);
        uint32_t last_bcast_seqno;
        struct hlist_head neigh_list;
-       struct list_head frag_list;
-       unsigned long last_frag_packet;
        /* neigh_list_lock protects: neigh_list, router & bonding_list */
        spinlock_t neigh_list_lock;
        struct hlist_node hash_entry;
@@ -874,18 +867,6 @@ struct batadv_forw_packet {
 };
 
 /**
- * struct batadv_frag_packet_list_entry - storage for fragment packet
- * @list: list node for orig_node::frag_list
- * @seqno: sequence number of the fragment
- * @skb: fragment's skb buffer
- */
-struct batadv_frag_packet_list_entry {
-       struct list_head list;
-       uint16_t seqno;
-       struct sk_buff *skb;
-};
-
-/**
  * struct batadv_algo_ops - mesh algorithm callbacks
  * @list: list node for the batadv_algo_list
  * @name: name of the algorithm
diff --git a/net/batman-adv/unicast.c b/net/batman-adv/unicast.c
deleted file mode 100644 (file)
index 48b31d3..0000000
+++ /dev/null
@@ -1,491 +0,0 @@
-/* Copyright (C) 2010-2013 B.A.T.M.A.N. contributors:
- *
- * Andreas Langer
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA
- */
-
-#include "main.h"
-#include "unicast.h"
-#include "send.h"
-#include "soft-interface.h"
-#include "gateway_client.h"
-#include "originator.h"
-#include "hash.h"
-#include "translation-table.h"
-#include "routing.h"
-#include "hard-interface.h"
-
-
-static struct sk_buff *
-batadv_frag_merge_packet(struct list_head *head,
-                        struct batadv_frag_packet_list_entry *tfp,
-                        struct sk_buff *skb)
-{
-       struct batadv_unicast_frag_packet *up;
-       struct sk_buff *tmp_skb;
-       struct batadv_unicast_packet *unicast_packet;
-       int hdr_len = sizeof(*unicast_packet);
-       int uni_diff = sizeof(*up) - hdr_len;
-       uint8_t *packet_pos;
-
-       up = (struct batadv_unicast_frag_packet *)skb->data;
-       /* set skb to the first part and tmp_skb to the second part */
-       if (up->flags & BATADV_UNI_FRAG_HEAD) {
-               tmp_skb = tfp->skb;
-       } else {
-               tmp_skb = skb;
-               skb = tfp->skb;
-       }
-
-       if (skb_linearize(skb) < 0 || skb_linearize(tmp_skb) < 0)
-               goto err;
-
-       skb_pull(tmp_skb, sizeof(*up));
-       if (pskb_expand_head(skb, 0, tmp_skb->len, GFP_ATOMIC) < 0)
-               goto err;
-
-       /* move free entry to end */
-       tfp->skb = NULL;
-       tfp->seqno = 0;
-       list_move_tail(&tfp->list, head);
-
-       memcpy(skb_put(skb, tmp_skb->len), tmp_skb->data, tmp_skb->len);
-       kfree_skb(tmp_skb);
-
-       memmove(skb->data + uni_diff, skb->data, hdr_len);
-       packet_pos = skb_pull(skb, uni_diff);
-       unicast_packet = (struct batadv_unicast_packet *)packet_pos;
-       unicast_packet->header.packet_type = BATADV_UNICAST;
-
-       return skb;
-
-err:
-       /* free buffered skb, skb will be freed later */
-       kfree_skb(tfp->skb);
-       return NULL;
-}
-
-static void batadv_frag_create_entry(struct list_head *head,
-                                    struct sk_buff *skb)
-{
-       struct batadv_frag_packet_list_entry *tfp;
-       struct batadv_unicast_frag_packet *up;
-
-       up = (struct batadv_unicast_frag_packet *)skb->data;
-
-       /* free and oldest packets stand at the end */
-       tfp = list_entry((head)->prev, typeof(*tfp), list);
-       kfree_skb(tfp->skb);
-
-       tfp->seqno = ntohs(up->seqno);
-       tfp->skb = skb;
-       list_move(&tfp->list, head);
-       return;
-}
-
-static int batadv_frag_create_buffer(struct list_head *head)
-{
-       int i;
-       struct batadv_frag_packet_list_entry *tfp;
-
-       for (i = 0; i < BATADV_FRAG_BUFFER_SIZE; i++) {
-               tfp = kmalloc(sizeof(*tfp), GFP_ATOMIC);
-               if (!tfp) {
-                       batadv_frag_list_free(head);
-                       return -ENOMEM;
-               }
-               tfp->skb = NULL;
-               tfp->seqno = 0;
-               INIT_LIST_HEAD(&tfp->list);
-               list_add(&tfp->list, head);
-       }
-
-       return 0;
-}
-
-static struct batadv_frag_packet_list_entry *
-batadv_frag_search_packet(struct list_head *head,
-                         const struct batadv_unicast_frag_packet *up)
-{
-       struct batadv_frag_packet_list_entry *tfp;
-       struct batadv_unicast_frag_packet *tmp_up = NULL;
-       bool is_head_tmp, is_head;
-       uint16_t search_seqno;
-
-       if (up->flags & BATADV_UNI_FRAG_HEAD)
-               search_seqno = ntohs(up->seqno)+1;
-       else
-               search_seqno = ntohs(up->seqno)-1;
-
-       is_head = up->flags & BATADV_UNI_FRAG_HEAD;
-
-       list_for_each_entry(tfp, head, list) {
-               if (!tfp->skb)
-                       continue;
-
-               if (tfp->seqno == ntohs(up->seqno))
-                       goto mov_tail;
-
-               tmp_up = (struct batadv_unicast_frag_packet *)tfp->skb->data;
-
-               if (tfp->seqno == search_seqno) {
-                       is_head_tmp = tmp_up->flags & BATADV_UNI_FRAG_HEAD;
-                       if (is_head_tmp != is_head)
-                               return tfp;
-                       else
-                               goto mov_tail;
-               }
-       }
-       return NULL;
-
-mov_tail:
-       list_move_tail(&tfp->list, head);
-       return NULL;
-}
-
-void batadv_frag_list_free(struct list_head *head)
-{
-       struct batadv_frag_packet_list_entry *pf, *tmp_pf;
-
-       if (!list_empty(head)) {
-               list_for_each_entry_safe(pf, tmp_pf, head, list) {
-                       kfree_skb(pf->skb);
-                       list_del(&pf->list);
-                       kfree(pf);
-               }
-       }
-       return;
-}
-
-/* frag_reassemble_skb():
- * returns NET_RX_DROP if the operation failed - skb is left intact
- * returns NET_RX_SUCCESS if the fragment was buffered (skb_new will be NULL)
- * or the skb could be reassembled (skb_new will point to the new packet and
- * skb was freed)
- */
-int batadv_frag_reassemble_skb(struct sk_buff *skb,
-                              struct batadv_priv *bat_priv,
-                              struct sk_buff **new_skb)
-{
-       struct batadv_orig_node *orig_node;
-       struct batadv_frag_packet_list_entry *tmp_frag_entry;
-       int ret = NET_RX_DROP;
-       struct batadv_unicast_frag_packet *unicast_packet;
-
-       unicast_packet = (struct batadv_unicast_frag_packet *)skb->data;
-       *new_skb = NULL;
-
-       orig_node = batadv_orig_hash_find(bat_priv, unicast_packet->orig);
-       if (!orig_node)
-               goto out;
-
-       orig_node->last_frag_packet = jiffies;
-
-       if (list_empty(&orig_node->frag_list) &&
-           batadv_frag_create_buffer(&orig_node->frag_list)) {
-               pr_debug("couldn't create frag buffer\n");
-               goto out;
-       }
-
-       tmp_frag_entry = batadv_frag_search_packet(&orig_node->frag_list,
-                                                  unicast_packet);
-
-       if (!tmp_frag_entry) {
-               batadv_frag_create_entry(&orig_node->frag_list, skb);
-               ret = NET_RX_SUCCESS;
-               goto out;
-       }
-
-       *new_skb = batadv_frag_merge_packet(&orig_node->frag_list,
-                                           tmp_frag_entry, skb);
-       /* if not, merge failed */
-       if (*new_skb)
-               ret = NET_RX_SUCCESS;
-
-out:
-       if (orig_node)
-               batadv_orig_node_free_ref(orig_node);
-       return ret;
-}
-
-int batadv_frag_send_skb(struct sk_buff *skb, struct batadv_priv *bat_priv,
-                        struct batadv_hard_iface *hard_iface,
-                        const uint8_t dstaddr[])
-{
-       struct batadv_unicast_packet tmp_uc, *unicast_packet;
-       struct batadv_hard_iface *primary_if;
-       struct sk_buff *frag_skb;
-       struct batadv_unicast_frag_packet *frag1, *frag2;
-       int uc_hdr_len = sizeof(*unicast_packet);
-       int ucf_hdr_len = sizeof(*frag1);
-       int data_len = skb->len - uc_hdr_len;
-       int large_tail = 0, ret = NET_RX_DROP;
-       uint16_t seqno;
-
-       primary_if = batadv_primary_if_get_selected(bat_priv);
-       if (!primary_if)
-               goto dropped;
-
-       frag_skb = dev_alloc_skb(data_len - (data_len / 2) + ucf_hdr_len);
-       if (!frag_skb)
-               goto dropped;
-
-       skb->priority = TC_PRIO_CONTROL;
-       skb_reserve(frag_skb, ucf_hdr_len);
-
-       unicast_packet = (struct batadv_unicast_packet *)skb->data;
-       memcpy(&tmp_uc, unicast_packet, uc_hdr_len);
-       skb_split(skb, frag_skb, data_len / 2 + uc_hdr_len);
-
-       if (batadv_skb_head_push(skb, ucf_hdr_len - uc_hdr_len) < 0 ||
-           batadv_skb_head_push(frag_skb, ucf_hdr_len) < 0)
-               goto drop_frag;
-
-       frag1 = (struct batadv_unicast_frag_packet *)skb->data;
-       frag2 = (struct batadv_unicast_frag_packet *)frag_skb->data;
-
-       memcpy(frag1, &tmp_uc, sizeof(tmp_uc));
-
-       frag1->header.ttl--;
-       frag1->header.version = BATADV_COMPAT_VERSION;
-       frag1->header.packet_type = BATADV_UNICAST_FRAG;
-
-       memcpy(frag1->orig, primary_if->net_dev->dev_addr, ETH_ALEN);
-       memcpy(frag2, frag1, sizeof(*frag2));
-
-       if (data_len & 1)
-               large_tail = BATADV_UNI_FRAG_LARGETAIL;
-
-       frag1->flags = BATADV_UNI_FRAG_HEAD | large_tail;
-       frag2->flags = large_tail;
-
-       seqno = atomic_add_return(2, &hard_iface->frag_seqno);
-       frag1->seqno = htons(seqno - 1);
-       frag2->seqno = htons(seqno);
-
-       batadv_send_skb_packet(skb, hard_iface, dstaddr);
-       batadv_send_skb_packet(frag_skb, hard_iface, dstaddr);
-       ret = NET_RX_SUCCESS;
-       goto out;
-
-drop_frag:
-       kfree_skb(frag_skb);
-dropped:
-       kfree_skb(skb);
-out:
-       if (primary_if)
-               batadv_hardif_free_ref(primary_if);
-       return ret;
-}
-
-/**
- * batadv_unicast_push_and_fill_skb - extends the buffer and initializes the
- * common fields for unicast packets
- * @skb: packet
- * @hdr_size: amount of bytes to push at the beginning of the skb
- * @orig_node: the destination node
- *
- * Returns false if the buffer extension was not possible or true otherwise
- */
-static bool batadv_unicast_push_and_fill_skb(struct sk_buff *skb, int hdr_size,
-                                            struct batadv_orig_node *orig_node)
-{
-       struct batadv_unicast_packet *unicast_packet;
-       uint8_t ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn);
-
-       if (batadv_skb_head_push(skb, hdr_size) < 0)
-               return false;
-
-       unicast_packet = (struct batadv_unicast_packet *)skb->data;
-       unicast_packet->header.version = BATADV_COMPAT_VERSION;
-       /* batman packet type: unicast */
-       unicast_packet->header.packet_type = BATADV_UNICAST;
-       /* set unicast ttl */
-       unicast_packet->header.ttl = BATADV_TTL;
-       /* copy the destination for faster routing */
-       memcpy(unicast_packet->dest, orig_node->orig, ETH_ALEN);
-       /* set the destination tt version number */
-       unicast_packet->ttvn = ttvn;
-
-       return true;
-}
-
-/**
- * batadv_unicast_prepare_skb - encapsulate an skb with a unicast header
- * @skb: the skb containing the payload to encapsulate
- * @orig_node: the destination node
- *
- * Returns false if the payload could not be encapsulated or true otherwise.
- *
- * This call might reallocate skb data.
- */
-static bool batadv_unicast_prepare_skb(struct sk_buff *skb,
-                                      struct batadv_orig_node *orig_node)
-{
-       size_t uni_size = sizeof(struct batadv_unicast_packet);
-       return batadv_unicast_push_and_fill_skb(skb, uni_size, orig_node);
-}
-
-/**
- * batadv_unicast_4addr_prepare_skb - encapsulate an skb with a unicast4addr
- * header
- * @bat_priv: the bat priv with all the soft interface information
- * @skb: the skb containing the payload to encapsulate
- * @orig_node: the destination node
- * @packet_subtype: the batman 4addr packet subtype to use
- *
- * Returns false if the payload could not be encapsulated or true otherwise.
- *
- * This call might reallocate skb data.
- */
-bool batadv_unicast_4addr_prepare_skb(struct batadv_priv *bat_priv,
-                                     struct sk_buff *skb,
-                                     struct batadv_orig_node *orig,
-                                     int packet_subtype)
-{
-       struct batadv_hard_iface *primary_if;
-       struct batadv_unicast_4addr_packet *unicast_4addr_packet;
-       bool ret = false;
-
-       primary_if = batadv_primary_if_get_selected(bat_priv);
-       if (!primary_if)
-               goto out;
-
-       /* pull the header space and fill the unicast_packet substructure.
-        * We can do that because the first member of the unicast_4addr_packet
-        * is of type struct unicast_packet
-        */
-       if (!batadv_unicast_push_and_fill_skb(skb,
-                                             sizeof(*unicast_4addr_packet),
-                                             orig))
-               goto out;
-
-       unicast_4addr_packet = (struct batadv_unicast_4addr_packet *)skb->data;
-       unicast_4addr_packet->u.header.packet_type = BATADV_UNICAST_4ADDR;
-       memcpy(unicast_4addr_packet->src, primary_if->net_dev->dev_addr,
-              ETH_ALEN);
-       unicast_4addr_packet->subtype = packet_subtype;
-       unicast_4addr_packet->reserved = 0;
-
-       ret = true;
-out:
-       if (primary_if)
-               batadv_hardif_free_ref(primary_if);
-       return ret;
-}
-
-/**
- * batadv_unicast_generic_send_skb - send an skb as unicast
- * @bat_priv: the bat priv with all the soft interface information
- * @skb: payload to send
- * @packet_type: the batman unicast packet type to use
- * @packet_subtype: the batman packet subtype. It is ignored if packet_type is
- *                 not BATADV_UNICAT_4ADDR
- *
- * Returns 1 in case of error or 0 otherwise
- */
-int batadv_unicast_generic_send_skb(struct batadv_priv *bat_priv,
-                                   struct sk_buff *skb, int packet_type,
-                                   int packet_subtype)
-{
-       struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
-       struct batadv_unicast_packet *unicast_packet;
-       struct batadv_orig_node *orig_node;
-       struct batadv_neigh_node *neigh_node;
-       int data_len = skb->len;
-       int ret = NET_RX_DROP;
-       unsigned int dev_mtu, header_len;
-
-       /* get routing information */
-       if (is_multicast_ether_addr(ethhdr->h_dest)) {
-               orig_node = batadv_gw_get_selected_orig(bat_priv);
-               if (orig_node)
-                       goto find_router;
-       }
-
-       /* check for tt host - increases orig_node refcount.
-        * returns NULL in case of AP isolation
-        */
-       orig_node = batadv_transtable_search(bat_priv, ethhdr->h_source,
-                                            ethhdr->h_dest);
-
-find_router:
-       /* find_router():
-        *  - if orig_node is NULL it returns NULL
-        *  - increases neigh_nodes refcount if found.
-        */
-       neigh_node = batadv_find_router(bat_priv, orig_node, NULL);
-
-       if (!neigh_node)
-               goto out;
-
-       switch (packet_type) {
-       case BATADV_UNICAST:
-               if (!batadv_unicast_prepare_skb(skb, orig_node))
-                       goto out;
-
-               header_len = sizeof(struct batadv_unicast_packet);
-               break;
-       case BATADV_UNICAST_4ADDR:
-               if (!batadv_unicast_4addr_prepare_skb(bat_priv, skb, orig_node,
-                                                     packet_subtype))
-                       goto out;
-
-               header_len = sizeof(struct batadv_unicast_4addr_packet);
-               break;
-       default:
-               /* this function supports UNICAST and UNICAST_4ADDR only. It
-                * should never be invoked with any other packet type
-                */
-               goto out;
-       }
-
-       ethhdr = (struct ethhdr *)(skb->data + header_len);
-       unicast_packet = (struct batadv_unicast_packet *)skb->data;
-
-       /* inform the destination node that we are still missing a correct route
-        * for this client. The destination will receive this packet and will
-        * try to reroute it because the ttvn contained in the header is less
-        * than the current one
-        */
-       if (batadv_tt_global_client_is_roaming(bat_priv, ethhdr->h_dest))
-               unicast_packet->ttvn = unicast_packet->ttvn - 1;
-
-       dev_mtu = neigh_node->if_incoming->net_dev->mtu;
-       /* fragmentation mechanism only works for UNICAST (now) */
-       if (packet_type == BATADV_UNICAST &&
-           atomic_read(&bat_priv->fragmentation) &&
-           data_len + sizeof(*unicast_packet) > dev_mtu) {
-               /* send frag skb decreases ttl */
-               unicast_packet->header.ttl++;
-               ret = batadv_frag_send_skb(skb, bat_priv,
-                                          neigh_node->if_incoming,
-                                          neigh_node->addr);
-               goto out;
-       }
-
-       if (batadv_send_skb_to_orig(skb, orig_node, NULL) != NET_XMIT_DROP)
-               ret = 0;
-
-out:
-       if (neigh_node)
-               batadv_neigh_node_free_ref(neigh_node);
-       if (orig_node)
-               batadv_orig_node_free_ref(orig_node);
-       if (ret == NET_RX_DROP)
-               kfree_skb(skb);
-       return ret;
-}
diff --git a/net/batman-adv/unicast.h b/net/batman-adv/unicast.h
deleted file mode 100644 (file)
index 429cf8a..0000000
+++ /dev/null
@@ -1,92 +0,0 @@
-/* Copyright (C) 2010-2013 B.A.T.M.A.N. contributors:
- *
- * Andreas Langer
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA
- */
-
-#ifndef _NET_BATMAN_ADV_UNICAST_H_
-#define _NET_BATMAN_ADV_UNICAST_H_
-
-#include "packet.h"
-
-#define BATADV_FRAG_TIMEOUT 10000 /* purge frag list entries after time in ms */
-#define BATADV_FRAG_BUFFER_SIZE 6 /* number of list elements in buffer */
-
-int batadv_frag_reassemble_skb(struct sk_buff *skb,
-                              struct batadv_priv *bat_priv,
-                              struct sk_buff **new_skb);
-void batadv_frag_list_free(struct list_head *head);
-int batadv_frag_send_skb(struct sk_buff *skb, struct batadv_priv *bat_priv,
-                        struct batadv_hard_iface *hard_iface,
-                        const uint8_t dstaddr[]);
-bool batadv_unicast_4addr_prepare_skb(struct batadv_priv *bat_priv,
-                                     struct sk_buff *skb,
-                                     struct batadv_orig_node *orig_node,
-                                     int packet_subtype);
-int batadv_unicast_generic_send_skb(struct batadv_priv *bat_priv,
-                                   struct sk_buff *skb, int packet_type,
-                                   int packet_subtype);
-
-
-/**
- * batadv_unicast_send_skb - send the skb encapsulated in a unicast packet
- * @bat_priv: the bat priv with all the soft interface information
- * @skb: the payload to send
- */
-static inline int batadv_unicast_send_skb(struct batadv_priv *bat_priv,
-                                         struct sk_buff *skb)
-{
-       return batadv_unicast_generic_send_skb(bat_priv, skb, BATADV_UNICAST,
-                                              0);
-}
-
-/**
- * batadv_unicast_send_skb - send the skb encapsulated in a unicast4addr packet
- * @bat_priv: the bat priv with all the soft interface information
- * @skb: the payload to send
- * @packet_subtype: the batman 4addr packet subtype to use
- */
-static inline int batadv_unicast_4addr_send_skb(struct batadv_priv *bat_priv,
-                                               struct sk_buff *skb,
-                                               int packet_subtype)
-{
-       return batadv_unicast_generic_send_skb(bat_priv, skb,
-                                              BATADV_UNICAST_4ADDR,
-                                              packet_subtype);
-}
-
-static inline int batadv_frag_can_reassemble(const struct sk_buff *skb, int mtu)
-{
-       const struct batadv_unicast_frag_packet *unicast_packet;
-       int uneven_correction = 0;
-       unsigned int merged_size;
-
-       unicast_packet = (struct batadv_unicast_frag_packet *)skb->data;
-
-       if (unicast_packet->flags & BATADV_UNI_FRAG_LARGETAIL) {
-               if (unicast_packet->flags & BATADV_UNI_FRAG_HEAD)
-                       uneven_correction = 1;
-               else
-                       uneven_correction = -1;
-       }
-
-       merged_size = (skb->len - sizeof(*unicast_packet)) * 2;
-       merged_size += sizeof(struct batadv_unicast_packet) + uneven_correction;
-
-       return merged_size <= mtu;
-}
-
-#endif /* _NET_BATMAN_ADV_UNICAST_H_ */