Sven Eckelmann | 0046b04 | 2016-01-01 00:01:03 +0100 | [diff] [blame] | 1 | /* Copyright (C) 2007-2016 B.A.T.M.A.N. contributors: |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 2 | * |
| 3 | * Marek Lindner, Simon Wunderlich |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of version 2 of the GNU General Public |
| 7 | * License as published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, but |
| 10 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | * General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
Antonio Quartulli | ebf38fb | 2013-11-03 20:40:48 +0100 | [diff] [blame] | 15 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 16 | */ |
| 17 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 18 | #include "send.h" |
Sven Eckelmann | 1e2c2a4 | 2015-04-17 19:40:28 +0200 | [diff] [blame] | 19 | #include "main.h" |
| 20 | |
| 21 | #include <linux/atomic.h> |
| 22 | #include <linux/byteorder/generic.h> |
| 23 | #include <linux/etherdevice.h> |
| 24 | #include <linux/fs.h> |
| 25 | #include <linux/if_ether.h> |
| 26 | #include <linux/if.h> |
| 27 | #include <linux/jiffies.h> |
| 28 | #include <linux/kernel.h> |
| 29 | #include <linux/list.h> |
| 30 | #include <linux/netdevice.h> |
| 31 | #include <linux/printk.h> |
| 32 | #include <linux/rculist.h> |
| 33 | #include <linux/rcupdate.h> |
| 34 | #include <linux/skbuff.h> |
| 35 | #include <linux/slab.h> |
| 36 | #include <linux/spinlock.h> |
| 37 | #include <linux/stddef.h> |
| 38 | #include <linux/workqueue.h> |
| 39 | |
| 40 | #include "distributed-arp-table.h" |
Martin Hundebøll | ee75ed8 | 2013-05-23 16:53:03 +0200 | [diff] [blame] | 41 | #include "fragmentation.h" |
Sven Eckelmann | 1e2c2a4 | 2015-04-17 19:40:28 +0200 | [diff] [blame] | 42 | #include "gateway_client.h" |
| 43 | #include "hard-interface.h" |
| 44 | #include "network-coding.h" |
| 45 | #include "originator.h" |
| 46 | #include "routing.h" |
| 47 | #include "soft-interface.h" |
| 48 | #include "translation-table.h" |
Antonio Quartulli | af5d4f7 | 2012-11-26 00:38:50 +0100 | [diff] [blame] | 49 | |
Sven Eckelmann | bb079c8 | 2012-05-16 20:23:14 +0200 | [diff] [blame] | 50 | static void batadv_send_outstanding_bcast_packet(struct work_struct *work); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 51 | |
Antonio Quartulli | 95d3927 | 2016-01-16 16:40:15 +0800 | [diff] [blame] | 52 | /** |
| 53 | * batadv_send_skb_packet - send an already prepared packet |
| 54 | * @skb: the packet to send |
| 55 | * @hard_iface: the interface to use to send the broadcast packet |
| 56 | * @dst_addr: the payload destination |
| 57 | * |
| 58 | * Send out an already prepared packet to the given neighbor or broadcast it |
| 59 | * using the specified interface. Either hard_iface or neigh_node must be not |
| 60 | * NULL. |
| 61 | * If neigh_node is NULL, then the packet is broadcasted using hard_iface, |
| 62 | * otherwise it is sent as unicast to the given neighbor. |
| 63 | * |
| 64 | * Return: NET_TX_DROP in case of error or the result of dev_queue_xmit(skb) |
| 65 | * otherwise |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 66 | */ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 67 | int batadv_send_skb_packet(struct sk_buff *skb, |
| 68 | struct batadv_hard_iface *hard_iface, |
Sven Eckelmann | 6b5e971 | 2015-05-26 18:34:26 +0200 | [diff] [blame] | 69 | const u8 *dst_addr) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 70 | { |
Antonio Quartulli | 95d3927 | 2016-01-16 16:40:15 +0800 | [diff] [blame] | 71 | struct batadv_priv *bat_priv; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 72 | struct ethhdr *ethhdr; |
| 73 | |
Antonio Quartulli | 95d3927 | 2016-01-16 16:40:15 +0800 | [diff] [blame] | 74 | bat_priv = netdev_priv(hard_iface->soft_iface); |
| 75 | |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 76 | if (hard_iface->if_status != BATADV_IF_ACTIVE) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 77 | goto send_skb_err; |
| 78 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 79 | if (unlikely(!hard_iface->net_dev)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 80 | goto send_skb_err; |
| 81 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 82 | if (!(hard_iface->net_dev->flags & IFF_UP)) { |
Sven Eckelmann | 6796958 | 2012-03-26 16:22:45 +0200 | [diff] [blame] | 83 | pr_warn("Interface %s is not up - can't send packet via that interface!\n", |
| 84 | hard_iface->net_dev->name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 85 | goto send_skb_err; |
| 86 | } |
| 87 | |
| 88 | /* push to the ethernet header. */ |
Sven Eckelmann | 04b482a | 2012-05-12 02:09:38 +0200 | [diff] [blame] | 89 | if (batadv_skb_head_push(skb, ETH_HLEN) < 0) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 90 | goto send_skb_err; |
| 91 | |
| 92 | skb_reset_mac_header(skb); |
| 93 | |
Antonio Quartulli | 7ed4be9 | 2013-04-08 15:08:18 +0200 | [diff] [blame] | 94 | ethhdr = eth_hdr(skb); |
Antonio Quartulli | 8fdd015 | 2014-01-22 00:42:11 +0100 | [diff] [blame] | 95 | ether_addr_copy(ethhdr->h_source, hard_iface->net_dev->dev_addr); |
| 96 | ether_addr_copy(ethhdr->h_dest, dst_addr); |
Antonio Quartulli | 293e933 | 2013-05-19 12:55:16 +0200 | [diff] [blame] | 97 | ethhdr->h_proto = htons(ETH_P_BATMAN); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 98 | |
| 99 | skb_set_network_header(skb, ETH_HLEN); |
Antonio Quartulli | 293e933 | 2013-05-19 12:55:16 +0200 | [diff] [blame] | 100 | skb->protocol = htons(ETH_P_BATMAN); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 101 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 102 | skb->dev = hard_iface->net_dev; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 103 | |
Martin Hundebøll | 612d2b4 | 2013-01-25 11:12:42 +0100 | [diff] [blame] | 104 | /* Save a clone of the skb to use when decoding coded packets */ |
| 105 | batadv_nc_skb_store_for_decoding(bat_priv, skb); |
| 106 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 107 | /* dev_queue_xmit() returns a negative result on error. However on |
| 108 | * congestion and traffic shaping, it drops and returns NET_XMIT_DROP |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 109 | * (which is > 0). This will not be treated as an error. |
| 110 | */ |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 111 | return dev_queue_xmit(skb); |
| 112 | send_skb_err: |
| 113 | kfree_skb(skb); |
| 114 | return NET_XMIT_DROP; |
| 115 | } |
| 116 | |
Antonio Quartulli | 95d3927 | 2016-01-16 16:40:15 +0800 | [diff] [blame] | 117 | int batadv_send_broadcast_skb(struct sk_buff *skb, |
| 118 | struct batadv_hard_iface *hard_iface) |
| 119 | { |
| 120 | return batadv_send_skb_packet(skb, hard_iface, batadv_broadcast_addr); |
| 121 | } |
| 122 | |
| 123 | int batadv_send_unicast_skb(struct sk_buff *skb, |
| 124 | struct batadv_neigh_node *neigh) |
| 125 | { |
| 126 | #ifdef CONFIG_BATMAN_ADV_BATMAN_V |
| 127 | struct batadv_hardif_neigh_node *hardif_neigh; |
| 128 | #endif |
| 129 | int ret; |
| 130 | |
| 131 | ret = batadv_send_skb_packet(skb, neigh->if_incoming, neigh->addr); |
| 132 | |
| 133 | #ifdef CONFIG_BATMAN_ADV_BATMAN_V |
| 134 | hardif_neigh = batadv_hardif_neigh_get(neigh->if_incoming, neigh->addr); |
| 135 | |
| 136 | if ((hardif_neigh) && (ret != NET_XMIT_DROP)) |
| 137 | hardif_neigh->bat_v.last_unicast_tx = jiffies; |
| 138 | |
| 139 | if (hardif_neigh) |
| 140 | batadv_hardif_neigh_put(hardif_neigh); |
| 141 | #endif |
| 142 | |
| 143 | return ret; |
| 144 | } |
| 145 | |
Martin Hundebøll | bb351ba | 2012-10-16 16:13:48 +0200 | [diff] [blame] | 146 | /** |
| 147 | * batadv_send_skb_to_orig - Lookup next-hop and transmit skb. |
| 148 | * @skb: Packet to be transmitted. |
| 149 | * @orig_node: Final destination of the packet. |
| 150 | * @recv_if: Interface used when receiving the packet (can be NULL). |
| 151 | * |
| 152 | * Looks up the best next-hop towards the passed originator and passes the |
| 153 | * skb on for preparation of MAC header. If the packet originated from this |
| 154 | * host, NULL can be passed as recv_if and no interface alternating is |
| 155 | * attempted. |
| 156 | * |
Sven Eckelmann | 62fe710 | 2015-09-15 19:00:48 +0200 | [diff] [blame] | 157 | * Return: NET_XMIT_SUCCESS on success, NET_XMIT_DROP on failure, or |
Martin Hundebøll | e91ecfc | 2013-04-20 13:54:39 +0200 | [diff] [blame] | 158 | * NET_XMIT_POLICED if the skb is buffered for later transmit. |
Martin Hundebøll | bb351ba | 2012-10-16 16:13:48 +0200 | [diff] [blame] | 159 | */ |
Martin Hundebøll | e91ecfc | 2013-04-20 13:54:39 +0200 | [diff] [blame] | 160 | int batadv_send_skb_to_orig(struct sk_buff *skb, |
| 161 | struct batadv_orig_node *orig_node, |
| 162 | struct batadv_hard_iface *recv_if) |
Martin Hundebøll | bb351ba | 2012-10-16 16:13:48 +0200 | [diff] [blame] | 163 | { |
| 164 | struct batadv_priv *bat_priv = orig_node->bat_priv; |
| 165 | struct batadv_neigh_node *neigh_node; |
Martin Hundebøll | e91ecfc | 2013-04-20 13:54:39 +0200 | [diff] [blame] | 166 | int ret = NET_XMIT_DROP; |
Martin Hundebøll | bb351ba | 2012-10-16 16:13:48 +0200 | [diff] [blame] | 167 | |
| 168 | /* batadv_find_router() increases neigh_nodes refcount if found. */ |
| 169 | neigh_node = batadv_find_router(bat_priv, orig_node, recv_if); |
| 170 | if (!neigh_node) |
Martin Hundebøll | ee75ed8 | 2013-05-23 16:53:03 +0200 | [diff] [blame] | 171 | goto out; |
| 172 | |
| 173 | /* Check if the skb is too large to send in one piece and fragment |
| 174 | * it if needed. |
| 175 | */ |
| 176 | if (atomic_read(&bat_priv->fragmentation) && |
| 177 | skb->len > neigh_node->if_incoming->net_dev->mtu) { |
| 178 | /* Fragment and send packet. */ |
| 179 | if (batadv_frag_send_packet(skb, orig_node, neigh_node)) |
| 180 | ret = NET_XMIT_SUCCESS; |
| 181 | |
| 182 | goto out; |
| 183 | } |
Martin Hundebøll | bb351ba | 2012-10-16 16:13:48 +0200 | [diff] [blame] | 184 | |
Martin Hundebøll | e91ecfc | 2013-04-20 13:54:39 +0200 | [diff] [blame] | 185 | /* try to network code the packet, if it is received on an interface |
| 186 | * (i.e. being forwarded). If the packet originates from this node or if |
| 187 | * network coding fails, then send the packet as usual. |
| 188 | */ |
| 189 | if (recv_if && batadv_nc_skb_forward(skb, neigh_node)) { |
| 190 | ret = NET_XMIT_POLICED; |
| 191 | } else { |
Antonio Quartulli | 95d3927 | 2016-01-16 16:40:15 +0800 | [diff] [blame] | 192 | batadv_send_unicast_skb(skb, neigh_node); |
Martin Hundebøll | e91ecfc | 2013-04-20 13:54:39 +0200 | [diff] [blame] | 193 | ret = NET_XMIT_SUCCESS; |
| 194 | } |
Martin Hundebøll | bb351ba | 2012-10-16 16:13:48 +0200 | [diff] [blame] | 195 | |
Martin Hundebøll | ee75ed8 | 2013-05-23 16:53:03 +0200 | [diff] [blame] | 196 | out: |
| 197 | if (neigh_node) |
Sven Eckelmann | 25bb250 | 2016-01-17 11:01:11 +0100 | [diff] [blame] | 198 | batadv_neigh_node_put(neigh_node); |
Martin Hundebøll | bb351ba | 2012-10-16 16:13:48 +0200 | [diff] [blame] | 199 | |
Martin Hundebøll | e91ecfc | 2013-04-20 13:54:39 +0200 | [diff] [blame] | 200 | return ret; |
Martin Hundebøll | bb351ba | 2012-10-16 16:13:48 +0200 | [diff] [blame] | 201 | } |
| 202 | |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 203 | /** |
| 204 | * batadv_send_skb_push_fill_unicast - extend the buffer and initialize the |
| 205 | * common fields for unicast packets |
| 206 | * @skb: the skb carrying the unicast header to initialize |
| 207 | * @hdr_size: amount of bytes to push at the beginning of the skb |
| 208 | * @orig_node: the destination node |
| 209 | * |
Sven Eckelmann | 62fe710 | 2015-09-15 19:00:48 +0200 | [diff] [blame] | 210 | * Return: false if the buffer extension was not possible or true otherwise. |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 211 | */ |
| 212 | static bool |
| 213 | batadv_send_skb_push_fill_unicast(struct sk_buff *skb, int hdr_size, |
| 214 | struct batadv_orig_node *orig_node) |
| 215 | { |
| 216 | struct batadv_unicast_packet *unicast_packet; |
Sven Eckelmann | 6b5e971 | 2015-05-26 18:34:26 +0200 | [diff] [blame] | 217 | u8 ttvn = (u8)atomic_read(&orig_node->last_ttvn); |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 218 | |
| 219 | if (batadv_skb_head_push(skb, hdr_size) < 0) |
| 220 | return false; |
| 221 | |
| 222 | unicast_packet = (struct batadv_unicast_packet *)skb->data; |
Simon Wunderlich | a40d9b0 | 2013-12-02 20:38:31 +0100 | [diff] [blame] | 223 | unicast_packet->version = BATADV_COMPAT_VERSION; |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 224 | /* batman packet type: unicast */ |
Simon Wunderlich | a40d9b0 | 2013-12-02 20:38:31 +0100 | [diff] [blame] | 225 | unicast_packet->packet_type = BATADV_UNICAST; |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 226 | /* set unicast ttl */ |
Simon Wunderlich | a40d9b0 | 2013-12-02 20:38:31 +0100 | [diff] [blame] | 227 | unicast_packet->ttl = BATADV_TTL; |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 228 | /* copy the destination for faster routing */ |
Antonio Quartulli | 8fdd015 | 2014-01-22 00:42:11 +0100 | [diff] [blame] | 229 | ether_addr_copy(unicast_packet->dest, orig_node->orig); |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 230 | /* set the destination tt version number */ |
| 231 | unicast_packet->ttvn = ttvn; |
| 232 | |
| 233 | return true; |
| 234 | } |
| 235 | |
| 236 | /** |
| 237 | * batadv_send_skb_prepare_unicast - encapsulate an skb with a unicast header |
| 238 | * @skb: the skb containing the payload to encapsulate |
| 239 | * @orig_node: the destination node |
| 240 | * |
Sven Eckelmann | 62fe710 | 2015-09-15 19:00:48 +0200 | [diff] [blame] | 241 | * Return: false if the payload could not be encapsulated or true otherwise. |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 242 | */ |
| 243 | static bool batadv_send_skb_prepare_unicast(struct sk_buff *skb, |
| 244 | struct batadv_orig_node *orig_node) |
| 245 | { |
| 246 | size_t uni_size = sizeof(struct batadv_unicast_packet); |
| 247 | |
| 248 | return batadv_send_skb_push_fill_unicast(skb, uni_size, orig_node); |
| 249 | } |
| 250 | |
| 251 | /** |
| 252 | * batadv_send_skb_prepare_unicast_4addr - encapsulate an skb with a |
| 253 | * unicast 4addr header |
| 254 | * @bat_priv: the bat priv with all the soft interface information |
| 255 | * @skb: the skb containing the payload to encapsulate |
Sven Eckelmann | e51f039 | 2015-09-06 21:38:51 +0200 | [diff] [blame] | 256 | * @orig: the destination node |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 257 | * @packet_subtype: the unicast 4addr packet subtype to use |
| 258 | * |
Sven Eckelmann | 62fe710 | 2015-09-15 19:00:48 +0200 | [diff] [blame] | 259 | * Return: false if the payload could not be encapsulated or true otherwise. |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 260 | */ |
| 261 | bool batadv_send_skb_prepare_unicast_4addr(struct batadv_priv *bat_priv, |
| 262 | struct sk_buff *skb, |
| 263 | struct batadv_orig_node *orig, |
| 264 | int packet_subtype) |
| 265 | { |
| 266 | struct batadv_hard_iface *primary_if; |
| 267 | struct batadv_unicast_4addr_packet *uc_4addr_packet; |
| 268 | bool ret = false; |
| 269 | |
| 270 | primary_if = batadv_primary_if_get_selected(bat_priv); |
| 271 | if (!primary_if) |
| 272 | goto out; |
| 273 | |
| 274 | /* Pull the header space and fill the unicast_packet substructure. |
| 275 | * We can do that because the first member of the uc_4addr_packet |
| 276 | * is of type struct unicast_packet |
| 277 | */ |
| 278 | if (!batadv_send_skb_push_fill_unicast(skb, sizeof(*uc_4addr_packet), |
| 279 | orig)) |
| 280 | goto out; |
| 281 | |
| 282 | uc_4addr_packet = (struct batadv_unicast_4addr_packet *)skb->data; |
Simon Wunderlich | a40d9b0 | 2013-12-02 20:38:31 +0100 | [diff] [blame] | 283 | uc_4addr_packet->u.packet_type = BATADV_UNICAST_4ADDR; |
Antonio Quartulli | 8fdd015 | 2014-01-22 00:42:11 +0100 | [diff] [blame] | 284 | ether_addr_copy(uc_4addr_packet->src, primary_if->net_dev->dev_addr); |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 285 | uc_4addr_packet->subtype = packet_subtype; |
| 286 | uc_4addr_packet->reserved = 0; |
| 287 | |
| 288 | ret = true; |
| 289 | out: |
| 290 | if (primary_if) |
Sven Eckelmann | 82047ad | 2016-01-17 11:01:10 +0100 | [diff] [blame] | 291 | batadv_hardif_put(primary_if); |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 292 | return ret; |
| 293 | } |
| 294 | |
| 295 | /** |
Linus LĂĽssing | e300d31 | 2013-07-03 10:40:00 +0200 | [diff] [blame] | 296 | * batadv_send_skb_unicast - encapsulate and send an skb via unicast |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 297 | * @bat_priv: the bat priv with all the soft interface information |
| 298 | * @skb: payload to send |
| 299 | * @packet_type: the batman unicast packet type to use |
| 300 | * @packet_subtype: the unicast 4addr packet subtype (only relevant for unicast |
| 301 | * 4addr packets) |
Linus LĂĽssing | e300d31 | 2013-07-03 10:40:00 +0200 | [diff] [blame] | 302 | * @orig_node: the originator to send the packet to |
Antonio Quartulli | c018ad3 | 2013-06-04 12:11:39 +0200 | [diff] [blame] | 303 | * @vid: the vid to be used to search the translation table |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 304 | * |
Linus LĂĽssing | e300d31 | 2013-07-03 10:40:00 +0200 | [diff] [blame] | 305 | * Wrap the given skb into a batman-adv unicast or unicast-4addr header |
| 306 | * depending on whether BATADV_UNICAST or BATADV_UNICAST_4ADDR was supplied |
| 307 | * as packet_type. Then send this frame to the given orig_node and release a |
| 308 | * reference to this orig_node. |
| 309 | * |
Sven Eckelmann | 62fe710 | 2015-09-15 19:00:48 +0200 | [diff] [blame] | 310 | * Return: NET_XMIT_DROP in case of error or NET_XMIT_SUCCESS otherwise. |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 311 | */ |
Linus LĂĽssing | 1d8ab8d | 2014-02-15 17:47:52 +0100 | [diff] [blame] | 312 | int batadv_send_skb_unicast(struct batadv_priv *bat_priv, |
| 313 | struct sk_buff *skb, int packet_type, |
| 314 | int packet_subtype, |
| 315 | struct batadv_orig_node *orig_node, |
| 316 | unsigned short vid) |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 317 | { |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 318 | struct batadv_unicast_packet *unicast_packet; |
Antonio Quartulli | 8ea64e2 | 2015-05-11 20:34:52 +0200 | [diff] [blame] | 319 | struct ethhdr *ethhdr; |
Linus LĂĽssing | 927c2ed | 2014-01-19 22:22:45 +0100 | [diff] [blame] | 320 | int ret = NET_XMIT_DROP; |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 321 | |
Simon Wunderlich | 56a5ca8 | 2013-05-28 11:49:47 +0200 | [diff] [blame] | 322 | if (!orig_node) |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 323 | goto out; |
| 324 | |
| 325 | switch (packet_type) { |
| 326 | case BATADV_UNICAST: |
Antonio Quartulli | 33faa04 | 2013-10-19 14:06:05 +0200 | [diff] [blame] | 327 | if (!batadv_send_skb_prepare_unicast(skb, orig_node)) |
| 328 | goto out; |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 329 | break; |
| 330 | case BATADV_UNICAST_4ADDR: |
Antonio Quartulli | 33faa04 | 2013-10-19 14:06:05 +0200 | [diff] [blame] | 331 | if (!batadv_send_skb_prepare_unicast_4addr(bat_priv, skb, |
| 332 | orig_node, |
| 333 | packet_subtype)) |
| 334 | goto out; |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 335 | break; |
| 336 | default: |
| 337 | /* this function supports UNICAST and UNICAST_4ADDR only. It |
| 338 | * should never be invoked with any other packet type |
| 339 | */ |
| 340 | goto out; |
| 341 | } |
| 342 | |
Linus LĂĽssing | 927c2ed | 2014-01-19 22:22:45 +0100 | [diff] [blame] | 343 | /* skb->data might have been reallocated by |
| 344 | * batadv_send_skb_prepare_unicast{,_4addr}() |
| 345 | */ |
| 346 | ethhdr = eth_hdr(skb); |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 347 | unicast_packet = (struct batadv_unicast_packet *)skb->data; |
| 348 | |
| 349 | /* inform the destination node that we are still missing a correct route |
| 350 | * for this client. The destination will receive this packet and will |
| 351 | * try to reroute it because the ttvn contained in the header is less |
| 352 | * than the current one |
| 353 | */ |
Antonio Quartulli | c018ad3 | 2013-06-04 12:11:39 +0200 | [diff] [blame] | 354 | if (batadv_tt_global_client_is_roaming(bat_priv, ethhdr->h_dest, vid)) |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 355 | unicast_packet->ttvn = unicast_packet->ttvn - 1; |
| 356 | |
| 357 | if (batadv_send_skb_to_orig(skb, orig_node, NULL) != NET_XMIT_DROP) |
Linus LĂĽssing | e300d31 | 2013-07-03 10:40:00 +0200 | [diff] [blame] | 358 | ret = NET_XMIT_SUCCESS; |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 359 | |
| 360 | out: |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 361 | if (orig_node) |
Sven Eckelmann | 5d96731 | 2016-01-17 11:01:09 +0100 | [diff] [blame] | 362 | batadv_orig_node_put(orig_node); |
Linus LĂĽssing | e300d31 | 2013-07-03 10:40:00 +0200 | [diff] [blame] | 363 | if (ret == NET_XMIT_DROP) |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 364 | kfree_skb(skb); |
| 365 | return ret; |
| 366 | } |
| 367 | |
Linus LĂĽssing | e300d31 | 2013-07-03 10:40:00 +0200 | [diff] [blame] | 368 | /** |
| 369 | * batadv_send_skb_via_tt_generic - send an skb via TT lookup |
| 370 | * @bat_priv: the bat priv with all the soft interface information |
| 371 | * @skb: payload to send |
| 372 | * @packet_type: the batman unicast packet type to use |
| 373 | * @packet_subtype: the unicast 4addr packet subtype (only relevant for unicast |
| 374 | * 4addr packets) |
Antonio Quartulli | c5d3a65 | 2014-02-15 11:58:01 +0100 | [diff] [blame] | 375 | * @dst_hint: can be used to override the destination contained in the skb |
Linus LĂĽssing | e300d31 | 2013-07-03 10:40:00 +0200 | [diff] [blame] | 376 | * @vid: the vid to be used to search the translation table |
| 377 | * |
| 378 | * Look up the recipient node for the destination address in the ethernet |
| 379 | * header via the translation table. Wrap the given skb into a batman-adv |
| 380 | * unicast or unicast-4addr header depending on whether BATADV_UNICAST or |
| 381 | * BATADV_UNICAST_4ADDR was supplied as packet_type. Then send this frame |
| 382 | * to the according destination node. |
| 383 | * |
Sven Eckelmann | 62fe710 | 2015-09-15 19:00:48 +0200 | [diff] [blame] | 384 | * Return: NET_XMIT_DROP in case of error or NET_XMIT_SUCCESS otherwise. |
Linus LĂĽssing | e300d31 | 2013-07-03 10:40:00 +0200 | [diff] [blame] | 385 | */ |
| 386 | int batadv_send_skb_via_tt_generic(struct batadv_priv *bat_priv, |
| 387 | struct sk_buff *skb, int packet_type, |
Sven Eckelmann | 6b5e971 | 2015-05-26 18:34:26 +0200 | [diff] [blame] | 388 | int packet_subtype, u8 *dst_hint, |
Antonio Quartulli | 6c413b1 | 2013-11-05 19:31:08 +0100 | [diff] [blame] | 389 | unsigned short vid) |
Linus LĂĽssing | e300d31 | 2013-07-03 10:40:00 +0200 | [diff] [blame] | 390 | { |
| 391 | struct ethhdr *ethhdr = (struct ethhdr *)skb->data; |
| 392 | struct batadv_orig_node *orig_node; |
Sven Eckelmann | 6b5e971 | 2015-05-26 18:34:26 +0200 | [diff] [blame] | 393 | u8 *src, *dst; |
Linus LĂĽssing | e300d31 | 2013-07-03 10:40:00 +0200 | [diff] [blame] | 394 | |
Antonio Quartulli | 6c413b1 | 2013-11-05 19:31:08 +0100 | [diff] [blame] | 395 | src = ethhdr->h_source; |
| 396 | dst = ethhdr->h_dest; |
| 397 | |
| 398 | /* if we got an hint! let's send the packet to this client (if any) */ |
| 399 | if (dst_hint) { |
| 400 | src = NULL; |
| 401 | dst = dst_hint; |
| 402 | } |
| 403 | orig_node = batadv_transtable_search(bat_priv, src, dst, vid); |
| 404 | |
Linus LĂĽssing | e300d31 | 2013-07-03 10:40:00 +0200 | [diff] [blame] | 405 | return batadv_send_skb_unicast(bat_priv, skb, packet_type, |
| 406 | packet_subtype, orig_node, vid); |
| 407 | } |
| 408 | |
| 409 | /** |
| 410 | * batadv_send_skb_via_gw - send an skb via gateway lookup |
| 411 | * @bat_priv: the bat priv with all the soft interface information |
| 412 | * @skb: payload to send |
| 413 | * @vid: the vid to be used to search the translation table |
| 414 | * |
| 415 | * Look up the currently selected gateway. Wrap the given skb into a batman-adv |
| 416 | * unicast header and send this frame to this gateway node. |
| 417 | * |
Sven Eckelmann | 62fe710 | 2015-09-15 19:00:48 +0200 | [diff] [blame] | 418 | * Return: NET_XMIT_DROP in case of error or NET_XMIT_SUCCESS otherwise. |
Linus LĂĽssing | e300d31 | 2013-07-03 10:40:00 +0200 | [diff] [blame] | 419 | */ |
| 420 | int batadv_send_skb_via_gw(struct batadv_priv *bat_priv, struct sk_buff *skb, |
| 421 | unsigned short vid) |
| 422 | { |
| 423 | struct batadv_orig_node *orig_node; |
| 424 | |
| 425 | orig_node = batadv_gw_get_selected_orig(bat_priv); |
| 426 | return batadv_send_skb_unicast(bat_priv, skb, BATADV_UNICAST, 0, |
| 427 | orig_node, vid); |
| 428 | } |
| 429 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 430 | void batadv_schedule_bat_ogm(struct batadv_hard_iface *hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 431 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 432 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 433 | |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 434 | if ((hard_iface->if_status == BATADV_IF_NOT_IN_USE) || |
| 435 | (hard_iface->if_status == BATADV_IF_TO_BE_REMOVED)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 436 | return; |
| 437 | |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 438 | /* the interface gets activated here to avoid race conditions between |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 439 | * the moment of activating the interface in |
| 440 | * hardif_activate_interface() where the originator mac is set and |
| 441 | * outdated packets (especially uninitialized mac addresses) in the |
| 442 | * packet queue |
| 443 | */ |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 444 | if (hard_iface->if_status == BATADV_IF_TO_BE_ACTIVATED) |
| 445 | hard_iface->if_status = BATADV_IF_ACTIVE; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 446 | |
Marek Lindner | be9aa4c | 2012-05-07 04:22:05 +0800 | [diff] [blame] | 447 | bat_priv->bat_algo_ops->bat_ogm_schedule(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 448 | } |
| 449 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 450 | static void batadv_forw_packet_free(struct batadv_forw_packet *forw_packet) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 451 | { |
Markus Elfring | c799443 | 2015-11-15 08:04:43 +0100 | [diff] [blame] | 452 | kfree_skb(forw_packet->skb); |
Sven Eckelmann | 6d5808d | 2011-05-11 20:59:06 +0200 | [diff] [blame] | 453 | if (forw_packet->if_incoming) |
Sven Eckelmann | 82047ad | 2016-01-17 11:01:10 +0100 | [diff] [blame] | 454 | batadv_hardif_put(forw_packet->if_incoming); |
Simon Wunderlich | ef0a937 | 2013-11-13 19:14:49 +0100 | [diff] [blame] | 455 | if (forw_packet->if_outgoing) |
Sven Eckelmann | 82047ad | 2016-01-17 11:01:10 +0100 | [diff] [blame] | 456 | batadv_hardif_put(forw_packet->if_outgoing); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 457 | kfree(forw_packet); |
| 458 | } |
| 459 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 460 | static void |
| 461 | _batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv, |
| 462 | struct batadv_forw_packet *forw_packet, |
| 463 | unsigned long send_time) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 464 | { |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 465 | /* add new packet to packet list */ |
| 466 | spin_lock_bh(&bat_priv->forw_bcast_list_lock); |
| 467 | hlist_add_head(&forw_packet->list, &bat_priv->forw_bcast_list); |
| 468 | spin_unlock_bh(&bat_priv->forw_bcast_list_lock); |
| 469 | |
| 470 | /* start timer for this packet */ |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 471 | queue_delayed_work(batadv_event_workqueue, &forw_packet->delayed_work, |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 472 | send_time); |
| 473 | } |
| 474 | |
Sven Eckelmann | 62fe710 | 2015-09-15 19:00:48 +0200 | [diff] [blame] | 475 | /** |
Sven Eckelmann | 7afcbbe | 2015-10-31 12:29:29 +0100 | [diff] [blame] | 476 | * batadv_add_bcast_packet_to_list - queue broadcast packet for multiple sends |
| 477 | * @bat_priv: the bat priv with all the soft interface information |
| 478 | * @skb: broadcast packet to add |
| 479 | * @delay: number of jiffies to wait before sending |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 480 | * |
Sven Eckelmann | 62fe710 | 2015-09-15 19:00:48 +0200 | [diff] [blame] | 481 | * add a broadcast packet to the queue and setup timers. broadcast packets |
| 482 | * are sent multiple times to increase probability for being received. |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 483 | * |
| 484 | * The skb is not consumed, so the caller should make sure that the |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 485 | * skb is freed. |
Sven Eckelmann | 62fe710 | 2015-09-15 19:00:48 +0200 | [diff] [blame] | 486 | * |
| 487 | * Return: NETDEV_TX_OK on success and NETDEV_TX_BUSY on errors. |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 488 | */ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 489 | int batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv, |
Sven Eckelmann | 9455e34 | 2012-05-12 02:09:37 +0200 | [diff] [blame] | 490 | const struct sk_buff *skb, |
| 491 | unsigned long delay) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 492 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 493 | struct batadv_hard_iface *primary_if = NULL; |
| 494 | struct batadv_forw_packet *forw_packet; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 495 | struct batadv_bcast_packet *bcast_packet; |
Sven Eckelmann | 747e422 | 2011-05-14 23:14:50 +0200 | [diff] [blame] | 496 | struct sk_buff *newskb; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 497 | |
Sven Eckelmann | 3e34819 | 2012-05-16 20:23:22 +0200 | [diff] [blame] | 498 | if (!batadv_atomic_dec_not_zero(&bat_priv->bcast_queue_left)) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 499 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
| 500 | "bcast packet queue full\n"); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 501 | goto out; |
| 502 | } |
| 503 | |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 504 | primary_if = batadv_primary_if_get_selected(bat_priv); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 505 | if (!primary_if) |
Marek Lindner | ca06c6e | 2011-05-14 20:01:22 +0200 | [diff] [blame] | 506 | goto out_and_inc; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 507 | |
Sven Eckelmann | 704509b | 2011-05-14 23:14:54 +0200 | [diff] [blame] | 508 | forw_packet = kmalloc(sizeof(*forw_packet), GFP_ATOMIC); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 509 | |
| 510 | if (!forw_packet) |
| 511 | goto out_and_inc; |
| 512 | |
Sven Eckelmann | 747e422 | 2011-05-14 23:14:50 +0200 | [diff] [blame] | 513 | newskb = skb_copy(skb, GFP_ATOMIC); |
| 514 | if (!newskb) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 515 | goto packet_free; |
| 516 | |
| 517 | /* as we have a copy now, it is safe to decrease the TTL */ |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 518 | bcast_packet = (struct batadv_bcast_packet *)newskb->data; |
Simon Wunderlich | a40d9b0 | 2013-12-02 20:38:31 +0100 | [diff] [blame] | 519 | bcast_packet->ttl--; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 520 | |
Sven Eckelmann | 747e422 | 2011-05-14 23:14:50 +0200 | [diff] [blame] | 521 | skb_reset_mac_header(newskb); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 522 | |
Sven Eckelmann | 747e422 | 2011-05-14 23:14:50 +0200 | [diff] [blame] | 523 | forw_packet->skb = newskb; |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 524 | forw_packet->if_incoming = primary_if; |
Simon Wunderlich | ef0a937 | 2013-11-13 19:14:49 +0100 | [diff] [blame] | 525 | forw_packet->if_outgoing = NULL; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 526 | |
| 527 | /* how often did we send the bcast packet ? */ |
| 528 | forw_packet->num_packets = 0; |
| 529 | |
Antonio Quartulli | 7241444 | 2012-12-25 13:14:37 +0100 | [diff] [blame] | 530 | INIT_DELAYED_WORK(&forw_packet->delayed_work, |
| 531 | batadv_send_outstanding_bcast_packet); |
| 532 | |
Sven Eckelmann | bb079c8 | 2012-05-16 20:23:14 +0200 | [diff] [blame] | 533 | _batadv_add_bcast_packet_to_list(bat_priv, forw_packet, delay); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 534 | return NETDEV_TX_OK; |
| 535 | |
| 536 | packet_free: |
| 537 | kfree(forw_packet); |
| 538 | out_and_inc: |
| 539 | atomic_inc(&bat_priv->bcast_queue_left); |
| 540 | out: |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 541 | if (primary_if) |
Sven Eckelmann | 82047ad | 2016-01-17 11:01:10 +0100 | [diff] [blame] | 542 | batadv_hardif_put(primary_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 543 | return NETDEV_TX_BUSY; |
| 544 | } |
| 545 | |
Sven Eckelmann | bb079c8 | 2012-05-16 20:23:14 +0200 | [diff] [blame] | 546 | static void batadv_send_outstanding_bcast_packet(struct work_struct *work) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 547 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 548 | struct batadv_hard_iface *hard_iface; |
Sven Eckelmann | bbb1f90 | 2012-07-08 17:13:15 +0200 | [diff] [blame] | 549 | struct delayed_work *delayed_work; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 550 | struct batadv_forw_packet *forw_packet; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 551 | struct sk_buff *skb1; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 552 | struct net_device *soft_iface; |
| 553 | struct batadv_priv *bat_priv; |
| 554 | |
Sven Eckelmann | bbb1f90 | 2012-07-08 17:13:15 +0200 | [diff] [blame] | 555 | delayed_work = container_of(work, struct delayed_work, work); |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 556 | forw_packet = container_of(delayed_work, struct batadv_forw_packet, |
| 557 | delayed_work); |
| 558 | soft_iface = forw_packet->if_incoming->soft_iface; |
| 559 | bat_priv = netdev_priv(soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 560 | |
| 561 | spin_lock_bh(&bat_priv->forw_bcast_list_lock); |
| 562 | hlist_del(&forw_packet->list); |
| 563 | spin_unlock_bh(&bat_priv->forw_bcast_list_lock); |
| 564 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 565 | if (atomic_read(&bat_priv->mesh_state) == BATADV_MESH_DEACTIVATING) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 566 | goto out; |
| 567 | |
Antonio Quartulli | c384ea3 | 2011-06-26 03:37:18 +0200 | [diff] [blame] | 568 | if (batadv_dat_drop_broadcast_packet(bat_priv, forw_packet)) |
| 569 | goto out; |
| 570 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 571 | /* rebroadcast packet */ |
| 572 | rcu_read_lock(); |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 573 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 574 | if (hard_iface->soft_iface != soft_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 575 | continue; |
| 576 | |
Matthias Schiffer | caf65bf | 2013-03-09 23:14:23 +0100 | [diff] [blame] | 577 | if (forw_packet->num_packets >= hard_iface->num_bcasts) |
| 578 | continue; |
| 579 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 580 | /* send a copy of the saved skb */ |
| 581 | skb1 = skb_clone(forw_packet->skb, GFP_ATOMIC); |
| 582 | if (skb1) |
Antonio Quartulli | 95d3927 | 2016-01-16 16:40:15 +0800 | [diff] [blame] | 583 | batadv_send_broadcast_skb(skb1, hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 584 | } |
| 585 | rcu_read_unlock(); |
| 586 | |
| 587 | forw_packet->num_packets++; |
| 588 | |
| 589 | /* if we still have some more bcasts to send */ |
Matthias Schiffer | caf65bf | 2013-03-09 23:14:23 +0100 | [diff] [blame] | 590 | if (forw_packet->num_packets < BATADV_NUM_BCASTS_MAX) { |
Sven Eckelmann | bb079c8 | 2012-05-16 20:23:14 +0200 | [diff] [blame] | 591 | _batadv_add_bcast_packet_to_list(bat_priv, forw_packet, |
| 592 | msecs_to_jiffies(5)); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 593 | return; |
| 594 | } |
| 595 | |
| 596 | out: |
Sven Eckelmann | bb079c8 | 2012-05-16 20:23:14 +0200 | [diff] [blame] | 597 | batadv_forw_packet_free(forw_packet); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 598 | atomic_inc(&bat_priv->bcast_queue_left); |
| 599 | } |
| 600 | |
Sven Eckelmann | 9455e34 | 2012-05-12 02:09:37 +0200 | [diff] [blame] | 601 | void batadv_send_outstanding_bat_ogm_packet(struct work_struct *work) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 602 | { |
Sven Eckelmann | bbb1f90 | 2012-07-08 17:13:15 +0200 | [diff] [blame] | 603 | struct delayed_work *delayed_work; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 604 | struct batadv_forw_packet *forw_packet; |
| 605 | struct batadv_priv *bat_priv; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 606 | |
Sven Eckelmann | bbb1f90 | 2012-07-08 17:13:15 +0200 | [diff] [blame] | 607 | delayed_work = container_of(work, struct delayed_work, work); |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 608 | forw_packet = container_of(delayed_work, struct batadv_forw_packet, |
| 609 | delayed_work); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 610 | bat_priv = netdev_priv(forw_packet->if_incoming->soft_iface); |
| 611 | spin_lock_bh(&bat_priv->forw_bat_list_lock); |
| 612 | hlist_del(&forw_packet->list); |
| 613 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); |
| 614 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 615 | if (atomic_read(&bat_priv->mesh_state) == BATADV_MESH_DEACTIVATING) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 616 | goto out; |
| 617 | |
Marek Lindner | 01c4224 | 2011-11-28 21:31:55 +0800 | [diff] [blame] | 618 | bat_priv->bat_algo_ops->bat_ogm_emit(forw_packet); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 619 | |
Simon Wunderlich | ef0a937 | 2013-11-13 19:14:49 +0100 | [diff] [blame] | 620 | /* we have to have at least one packet in the queue to determine the |
| 621 | * queues wake up time unless we are shutting down. |
| 622 | * |
| 623 | * only re-schedule if this is the "original" copy, e.g. the OGM of the |
| 624 | * primary interface should only be rescheduled once per period, but |
| 625 | * this function will be called for the forw_packet instances of the |
| 626 | * other secondary interfaces as well. |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 627 | */ |
Simon Wunderlich | ef0a937 | 2013-11-13 19:14:49 +0100 | [diff] [blame] | 628 | if (forw_packet->own && |
| 629 | forw_packet->if_incoming == forw_packet->if_outgoing) |
Sven Eckelmann | 9455e34 | 2012-05-12 02:09:37 +0200 | [diff] [blame] | 630 | batadv_schedule_bat_ogm(forw_packet->if_incoming); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 631 | |
| 632 | out: |
| 633 | /* don't count own packet */ |
| 634 | if (!forw_packet->own) |
| 635 | atomic_inc(&bat_priv->batman_queue_left); |
| 636 | |
Sven Eckelmann | bb079c8 | 2012-05-16 20:23:14 +0200 | [diff] [blame] | 637 | batadv_forw_packet_free(forw_packet); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 638 | } |
| 639 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 640 | void |
| 641 | batadv_purge_outstanding_packets(struct batadv_priv *bat_priv, |
| 642 | const struct batadv_hard_iface *hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 643 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 644 | struct batadv_forw_packet *forw_packet; |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 645 | struct hlist_node *safe_tmp_node; |
Sven Eckelmann | 6d5808d | 2011-05-11 20:59:06 +0200 | [diff] [blame] | 646 | bool pending; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 647 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 648 | if (hard_iface) |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 649 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 650 | "purge_outstanding_packets(): %s\n", |
| 651 | hard_iface->net_dev->name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 652 | else |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 653 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 654 | "purge_outstanding_packets()\n"); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 655 | |
| 656 | /* free bcast list */ |
| 657 | spin_lock_bh(&bat_priv->forw_bcast_list_lock); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 658 | hlist_for_each_entry_safe(forw_packet, safe_tmp_node, |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 659 | &bat_priv->forw_bcast_list, list) { |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 660 | /* if purge_outstanding_packets() was called with an argument |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 661 | * we delete only packets belonging to the given interface |
| 662 | */ |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 663 | if ((hard_iface) && |
Simon Wunderlich | 3f1e08d | 2015-06-24 14:50:20 +0200 | [diff] [blame] | 664 | (forw_packet->if_incoming != hard_iface) && |
| 665 | (forw_packet->if_outgoing != hard_iface)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 666 | continue; |
| 667 | |
| 668 | spin_unlock_bh(&bat_priv->forw_bcast_list_lock); |
| 669 | |
Sven Eckelmann | bb079c8 | 2012-05-16 20:23:14 +0200 | [diff] [blame] | 670 | /* batadv_send_outstanding_bcast_packet() will lock the list to |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 671 | * delete the item from the list |
| 672 | */ |
Sven Eckelmann | 6d5808d | 2011-05-11 20:59:06 +0200 | [diff] [blame] | 673 | pending = cancel_delayed_work_sync(&forw_packet->delayed_work); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 674 | spin_lock_bh(&bat_priv->forw_bcast_list_lock); |
Sven Eckelmann | 6d5808d | 2011-05-11 20:59:06 +0200 | [diff] [blame] | 675 | |
| 676 | if (pending) { |
| 677 | hlist_del(&forw_packet->list); |
Sven Eckelmann | bb079c8 | 2012-05-16 20:23:14 +0200 | [diff] [blame] | 678 | batadv_forw_packet_free(forw_packet); |
Sven Eckelmann | 6d5808d | 2011-05-11 20:59:06 +0200 | [diff] [blame] | 679 | } |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 680 | } |
| 681 | spin_unlock_bh(&bat_priv->forw_bcast_list_lock); |
| 682 | |
| 683 | /* free batman packet list */ |
| 684 | spin_lock_bh(&bat_priv->forw_bat_list_lock); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 685 | hlist_for_each_entry_safe(forw_packet, safe_tmp_node, |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 686 | &bat_priv->forw_bat_list, list) { |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 687 | /* if purge_outstanding_packets() was called with an argument |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 688 | * we delete only packets belonging to the given interface |
| 689 | */ |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 690 | if ((hard_iface) && |
Simon Wunderlich | ef0a937 | 2013-11-13 19:14:49 +0100 | [diff] [blame] | 691 | (forw_packet->if_incoming != hard_iface) && |
| 692 | (forw_packet->if_outgoing != hard_iface)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 693 | continue; |
| 694 | |
| 695 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); |
| 696 | |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 697 | /* send_outstanding_bat_packet() will lock the list to |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 698 | * delete the item from the list |
| 699 | */ |
Sven Eckelmann | 6d5808d | 2011-05-11 20:59:06 +0200 | [diff] [blame] | 700 | pending = cancel_delayed_work_sync(&forw_packet->delayed_work); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 701 | spin_lock_bh(&bat_priv->forw_bat_list_lock); |
Sven Eckelmann | 6d5808d | 2011-05-11 20:59:06 +0200 | [diff] [blame] | 702 | |
| 703 | if (pending) { |
| 704 | hlist_del(&forw_packet->list); |
Sven Eckelmann | bb079c8 | 2012-05-16 20:23:14 +0200 | [diff] [blame] | 705 | batadv_forw_packet_free(forw_packet); |
Sven Eckelmann | 6d5808d | 2011-05-11 20:59:06 +0200 | [diff] [blame] | 706 | } |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 707 | } |
| 708 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); |
| 709 | } |