Antonio Quartulli | 0b87393 | 2013-01-04 03:05:31 +0100 | [diff] [blame] | 1 | /* Copyright (C) 2007-2013 B.A.T.M.A.N. contributors: |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [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 |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 17 | * 02110-1301, USA |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 18 | */ |
| 19 | |
| 20 | #include "main.h" |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 21 | #include "translation-table.h" |
| 22 | #include "ring_buffer.h" |
| 23 | #include "originator.h" |
| 24 | #include "routing.h" |
| 25 | #include "gateway_common.h" |
| 26 | #include "gateway_client.h" |
| 27 | #include "hard-interface.h" |
| 28 | #include "send.h" |
Marek Lindner | 1c28047 | 2011-11-28 17:40:17 +0800 | [diff] [blame] | 29 | #include "bat_algo.h" |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 30 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 31 | static struct batadv_neigh_node * |
| 32 | batadv_iv_ogm_neigh_new(struct batadv_hard_iface *hard_iface, |
| 33 | const uint8_t *neigh_addr, |
| 34 | struct batadv_orig_node *orig_node, |
| 35 | struct batadv_orig_node *orig_neigh, __be32 seqno) |
Marek Lindner | 7ae8b28 | 2012-03-01 15:35:21 +0800 | [diff] [blame] | 36 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 37 | struct batadv_neigh_node *neigh_node; |
Marek Lindner | 7ae8b28 | 2012-03-01 15:35:21 +0800 | [diff] [blame] | 38 | |
Al Viro | e0f5211 | 2012-04-22 07:46:29 +0100 | [diff] [blame] | 39 | neigh_node = batadv_neigh_node_new(hard_iface, neigh_addr, |
| 40 | ntohl(seqno)); |
Marek Lindner | 7ae8b28 | 2012-03-01 15:35:21 +0800 | [diff] [blame] | 41 | if (!neigh_node) |
| 42 | goto out; |
| 43 | |
| 44 | INIT_LIST_HEAD(&neigh_node->bonding_list); |
Marek Lindner | 7ae8b28 | 2012-03-01 15:35:21 +0800 | [diff] [blame] | 45 | |
| 46 | neigh_node->orig_node = orig_neigh; |
| 47 | neigh_node->if_incoming = hard_iface; |
| 48 | |
| 49 | spin_lock_bh(&orig_node->neigh_list_lock); |
| 50 | hlist_add_head_rcu(&neigh_node->list, &orig_node->neigh_list); |
| 51 | spin_unlock_bh(&orig_node->neigh_list_lock); |
| 52 | |
| 53 | out: |
| 54 | return neigh_node; |
| 55 | } |
| 56 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 57 | static int batadv_iv_ogm_iface_enable(struct batadv_hard_iface *hard_iface) |
Marek Lindner | d0b9fd8 | 2011-07-30 12:33:33 +0200 | [diff] [blame] | 58 | { |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 59 | struct batadv_ogm_packet *batadv_ogm_packet; |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 60 | unsigned char *ogm_buff; |
Marek Lindner | d7d32ec | 2012-02-07 17:20:46 +0800 | [diff] [blame] | 61 | uint32_t random_seqno; |
Sven Eckelmann | 5346c35 | 2012-05-05 13:27:28 +0200 | [diff] [blame] | 62 | int res = -ENOMEM; |
Marek Lindner | d7d32ec | 2012-02-07 17:20:46 +0800 | [diff] [blame] | 63 | |
| 64 | /* randomize initial seqno to avoid collision */ |
| 65 | get_random_bytes(&random_seqno, sizeof(random_seqno)); |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 66 | atomic_set(&hard_iface->bat_iv.ogm_seqno, random_seqno); |
Marek Lindner | d0b9fd8 | 2011-07-30 12:33:33 +0200 | [diff] [blame] | 67 | |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 68 | hard_iface->bat_iv.ogm_buff_len = BATADV_OGM_HLEN; |
| 69 | ogm_buff = kmalloc(hard_iface->bat_iv.ogm_buff_len, GFP_ATOMIC); |
| 70 | if (!ogm_buff) |
Marek Lindner | 77af757 | 2012-02-07 17:20:48 +0800 | [diff] [blame] | 71 | goto out; |
| 72 | |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 73 | hard_iface->bat_iv.ogm_buff = ogm_buff; |
| 74 | |
| 75 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 76 | batadv_ogm_packet->header.packet_type = BATADV_IV_OGM; |
| 77 | batadv_ogm_packet->header.version = BATADV_COMPAT_VERSION; |
| 78 | batadv_ogm_packet->header.ttl = 2; |
| 79 | batadv_ogm_packet->flags = BATADV_NO_FLAGS; |
| 80 | batadv_ogm_packet->tq = BATADV_TQ_MAX_VALUE; |
| 81 | batadv_ogm_packet->tt_num_changes = 0; |
| 82 | batadv_ogm_packet->ttvn = 0; |
Marek Lindner | 77af757 | 2012-02-07 17:20:48 +0800 | [diff] [blame] | 83 | |
| 84 | res = 0; |
| 85 | |
| 86 | out: |
| 87 | return res; |
Marek Lindner | d0b9fd8 | 2011-07-30 12:33:33 +0200 | [diff] [blame] | 88 | } |
| 89 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 90 | static void batadv_iv_ogm_iface_disable(struct batadv_hard_iface *hard_iface) |
Marek Lindner | 00a5007 | 2012-02-07 17:20:47 +0800 | [diff] [blame] | 91 | { |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 92 | kfree(hard_iface->bat_iv.ogm_buff); |
| 93 | hard_iface->bat_iv.ogm_buff = NULL; |
Marek Lindner | 00a5007 | 2012-02-07 17:20:47 +0800 | [diff] [blame] | 94 | } |
| 95 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 96 | static void batadv_iv_ogm_iface_update_mac(struct batadv_hard_iface *hard_iface) |
Marek Lindner | d0b9fd8 | 2011-07-30 12:33:33 +0200 | [diff] [blame] | 97 | { |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 98 | struct batadv_ogm_packet *batadv_ogm_packet; |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 99 | unsigned char *ogm_buff = hard_iface->bat_iv.ogm_buff; |
Marek Lindner | d0b9fd8 | 2011-07-30 12:33:33 +0200 | [diff] [blame] | 100 | |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 101 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 102 | memcpy(batadv_ogm_packet->orig, |
Marek Lindner | d0b9fd8 | 2011-07-30 12:33:33 +0200 | [diff] [blame] | 103 | hard_iface->net_dev->dev_addr, ETH_ALEN); |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 104 | memcpy(batadv_ogm_packet->prev_sender, |
Marek Lindner | d0b9fd8 | 2011-07-30 12:33:33 +0200 | [diff] [blame] | 105 | hard_iface->net_dev->dev_addr, ETH_ALEN); |
| 106 | } |
| 107 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 108 | static void |
| 109 | batadv_iv_ogm_primary_iface_set(struct batadv_hard_iface *hard_iface) |
Marek Lindner | c322939 | 2012-03-11 06:17:50 +0800 | [diff] [blame] | 110 | { |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 111 | struct batadv_ogm_packet *batadv_ogm_packet; |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 112 | unsigned char *ogm_buff = hard_iface->bat_iv.ogm_buff; |
Marek Lindner | c322939 | 2012-03-11 06:17:50 +0800 | [diff] [blame] | 113 | |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 114 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 115 | batadv_ogm_packet->flags = BATADV_PRIMARIES_FIRST_HOP; |
| 116 | batadv_ogm_packet->header.ttl = BATADV_TTL; |
Marek Lindner | c322939 | 2012-03-11 06:17:50 +0800 | [diff] [blame] | 117 | } |
| 118 | |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 119 | /* when do we schedule our own ogm to be sent */ |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 120 | static unsigned long |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 121 | batadv_iv_ogm_emit_send_time(const struct batadv_priv *bat_priv) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 122 | { |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 123 | unsigned int msecs; |
| 124 | |
| 125 | msecs = atomic_read(&bat_priv->orig_interval) - BATADV_JITTER; |
Akinobu Mita | e76e432 | 2012-12-24 11:14:07 +0900 | [diff] [blame] | 126 | msecs += prandom_u32() % (2 * BATADV_JITTER); |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 127 | |
| 128 | return jiffies + msecs_to_jiffies(msecs); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 129 | } |
| 130 | |
| 131 | /* when do we schedule a ogm packet to be sent */ |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 132 | static unsigned long batadv_iv_ogm_fwd_send_time(void) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 133 | { |
Akinobu Mita | e76e432 | 2012-12-24 11:14:07 +0900 | [diff] [blame] | 134 | return jiffies + msecs_to_jiffies(prandom_u32() % (BATADV_JITTER / 2)); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 135 | } |
| 136 | |
| 137 | /* apply hop penalty for a normal link */ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 138 | static uint8_t batadv_hop_penalty(uint8_t tq, |
| 139 | const struct batadv_priv *bat_priv) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 140 | { |
| 141 | int hop_penalty = atomic_read(&bat_priv->hop_penalty); |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 142 | int new_tq; |
| 143 | |
| 144 | new_tq = tq * (BATADV_TQ_MAX_VALUE - hop_penalty); |
| 145 | new_tq /= BATADV_TQ_MAX_VALUE; |
| 146 | |
| 147 | return new_tq; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 148 | } |
| 149 | |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 150 | /* is there another aggregated packet here? */ |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 151 | static int batadv_iv_ogm_aggr_packet(int buff_pos, int packet_len, |
| 152 | int tt_num_changes) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 153 | { |
Sven Eckelmann | 08c36d3 | 2012-05-12 02:09:39 +0200 | [diff] [blame] | 154 | int next_buff_pos = 0; |
| 155 | |
Sven Eckelmann | 7e071c7 | 2012-06-03 22:19:13 +0200 | [diff] [blame] | 156 | next_buff_pos += buff_pos + BATADV_OGM_HLEN; |
Sven Eckelmann | 08c36d3 | 2012-05-12 02:09:39 +0200 | [diff] [blame] | 157 | next_buff_pos += batadv_tt_len(tt_num_changes); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 158 | |
| 159 | return (next_buff_pos <= packet_len) && |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 160 | (next_buff_pos <= BATADV_MAX_AGGREGATION_BYTES); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 161 | } |
| 162 | |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 163 | /* send a batman ogm to a given interface */ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 164 | static void batadv_iv_ogm_send_to_if(struct batadv_forw_packet *forw_packet, |
| 165 | struct batadv_hard_iface *hard_iface) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 166 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 167 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 168 | char *fwd_str; |
| 169 | uint8_t packet_num; |
| 170 | int16_t buff_pos; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 171 | struct batadv_ogm_packet *batadv_ogm_packet; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 172 | struct sk_buff *skb; |
Sven Eckelmann | c67893d | 2012-07-08 18:33:51 +0200 | [diff] [blame] | 173 | uint8_t *packet_pos; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 174 | |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 175 | if (hard_iface->if_status != BATADV_IF_ACTIVE) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 176 | return; |
| 177 | |
| 178 | packet_num = 0; |
| 179 | buff_pos = 0; |
Sven Eckelmann | c67893d | 2012-07-08 18:33:51 +0200 | [diff] [blame] | 180 | packet_pos = forw_packet->skb->data; |
| 181 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 182 | |
| 183 | /* adjust all flags and log packets */ |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 184 | while (batadv_iv_ogm_aggr_packet(buff_pos, forw_packet->packet_len, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 185 | batadv_ogm_packet->tt_num_changes)) { |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 186 | /* we might have aggregated direct link packets with an |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 187 | * ordinary base packet |
| 188 | */ |
Sven Eckelmann | 8de47de | 2012-07-08 16:32:09 +0200 | [diff] [blame] | 189 | if (forw_packet->direct_link_flags & BIT(packet_num) && |
| 190 | forw_packet->if_incoming == hard_iface) |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 191 | batadv_ogm_packet->flags |= BATADV_DIRECTLINK; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 192 | else |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 193 | batadv_ogm_packet->flags &= ~BATADV_DIRECTLINK; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 194 | |
Sven Eckelmann | c67893d | 2012-07-08 18:33:51 +0200 | [diff] [blame] | 195 | if (packet_num > 0 || !forw_packet->own) |
| 196 | fwd_str = "Forwarding"; |
| 197 | else |
| 198 | fwd_str = "Sending own"; |
| 199 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 200 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 201 | "%s %spacket (originator %pM, seqno %u, TQ %d, TTL %d, IDF %s, ttvn %d) on interface %s [%pM]\n", |
| 202 | fwd_str, (packet_num > 0 ? "aggregated " : ""), |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 203 | batadv_ogm_packet->orig, |
| 204 | ntohl(batadv_ogm_packet->seqno), |
| 205 | batadv_ogm_packet->tq, batadv_ogm_packet->header.ttl, |
| 206 | (batadv_ogm_packet->flags & BATADV_DIRECTLINK ? |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 207 | "on" : "off"), |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 208 | batadv_ogm_packet->ttvn, hard_iface->net_dev->name, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 209 | hard_iface->net_dev->dev_addr); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 210 | |
Sven Eckelmann | 7e071c7 | 2012-06-03 22:19:13 +0200 | [diff] [blame] | 211 | buff_pos += BATADV_OGM_HLEN; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 212 | buff_pos += batadv_tt_len(batadv_ogm_packet->tt_num_changes); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 213 | packet_num++; |
Sven Eckelmann | c67893d | 2012-07-08 18:33:51 +0200 | [diff] [blame] | 214 | packet_pos = forw_packet->skb->data + buff_pos; |
| 215 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 216 | } |
| 217 | |
| 218 | /* create clone because function is called more than once */ |
| 219 | skb = skb_clone(forw_packet->skb, GFP_ATOMIC); |
Martin Hundebøll | f821486 | 2012-04-20 17:02:45 +0200 | [diff] [blame] | 220 | if (skb) { |
Sven Eckelmann | d69909d | 2012-06-03 22:19:20 +0200 | [diff] [blame] | 221 | batadv_inc_counter(bat_priv, BATADV_CNT_MGMT_TX); |
| 222 | batadv_add_counter(bat_priv, BATADV_CNT_MGMT_TX_BYTES, |
Martin Hundebøll | f821486 | 2012-04-20 17:02:45 +0200 | [diff] [blame] | 223 | skb->len + ETH_HLEN); |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 224 | batadv_send_skb_packet(skb, hard_iface, batadv_broadcast_addr); |
Martin Hundebøll | f821486 | 2012-04-20 17:02:45 +0200 | [diff] [blame] | 225 | } |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 226 | } |
| 227 | |
| 228 | /* send a batman ogm packet */ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 229 | static void batadv_iv_ogm_emit(struct batadv_forw_packet *forw_packet) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 230 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 231 | struct batadv_hard_iface *hard_iface; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 232 | struct net_device *soft_iface; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 233 | struct batadv_priv *bat_priv; |
| 234 | struct batadv_hard_iface *primary_if = NULL; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 235 | struct batadv_ogm_packet *batadv_ogm_packet; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 236 | unsigned char directlink; |
Sven Eckelmann | c67893d | 2012-07-08 18:33:51 +0200 | [diff] [blame] | 237 | uint8_t *packet_pos; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 238 | |
Sven Eckelmann | c67893d | 2012-07-08 18:33:51 +0200 | [diff] [blame] | 239 | packet_pos = forw_packet->skb->data; |
| 240 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 241 | directlink = (batadv_ogm_packet->flags & BATADV_DIRECTLINK ? 1 : 0); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 242 | |
| 243 | if (!forw_packet->if_incoming) { |
Sven Eckelmann | 86ceb36 | 2012-03-07 09:07:45 +0100 | [diff] [blame] | 244 | pr_err("Error - can't forward packet: incoming iface not specified\n"); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 245 | goto out; |
| 246 | } |
| 247 | |
| 248 | soft_iface = forw_packet->if_incoming->soft_iface; |
| 249 | bat_priv = netdev_priv(soft_iface); |
| 250 | |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 251 | if (forw_packet->if_incoming->if_status != BATADV_IF_ACTIVE) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 252 | goto out; |
| 253 | |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 254 | primary_if = batadv_primary_if_get_selected(bat_priv); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 255 | if (!primary_if) |
| 256 | goto out; |
| 257 | |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 258 | /* multihomed peer assumed |
| 259 | * non-primary OGMs are only broadcasted on their interface |
| 260 | */ |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 261 | if ((directlink && (batadv_ogm_packet->header.ttl == 1)) || |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 262 | (forw_packet->own && (forw_packet->if_incoming != primary_if))) { |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 263 | /* FIXME: what about aggregated packets ? */ |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 264 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 265 | "%s packet (originator %pM, seqno %u, TTL %d) on interface %s [%pM]\n", |
| 266 | (forw_packet->own ? "Sending own" : "Forwarding"), |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 267 | batadv_ogm_packet->orig, |
| 268 | ntohl(batadv_ogm_packet->seqno), |
| 269 | batadv_ogm_packet->header.ttl, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 270 | forw_packet->if_incoming->net_dev->name, |
| 271 | forw_packet->if_incoming->net_dev->dev_addr); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 272 | |
| 273 | /* skb is only used once and than forw_packet is free'd */ |
Sven Eckelmann | 9455e34 | 2012-05-12 02:09:37 +0200 | [diff] [blame] | 274 | batadv_send_skb_packet(forw_packet->skb, |
| 275 | forw_packet->if_incoming, |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 276 | batadv_broadcast_addr); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 277 | forw_packet->skb = NULL; |
| 278 | |
| 279 | goto out; |
| 280 | } |
| 281 | |
| 282 | /* broadcast on every interface */ |
| 283 | rcu_read_lock(); |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 284 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 285 | if (hard_iface->soft_iface != soft_iface) |
| 286 | continue; |
| 287 | |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 288 | batadv_iv_ogm_send_to_if(forw_packet, hard_iface); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 289 | } |
| 290 | rcu_read_unlock(); |
| 291 | |
| 292 | out: |
| 293 | if (primary_if) |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 294 | batadv_hardif_free_ref(primary_if); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 295 | } |
| 296 | |
| 297 | /* return true if new_packet can be aggregated with forw_packet */ |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 298 | static bool |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 299 | batadv_iv_ogm_can_aggregate(const struct batadv_ogm_packet *new_bat_ogm_packet, |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 300 | struct batadv_priv *bat_priv, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 301 | int packet_len, unsigned long send_time, |
| 302 | bool directlink, |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 303 | const struct batadv_hard_iface *if_incoming, |
| 304 | const struct batadv_forw_packet *forw_packet) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 305 | { |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 306 | struct batadv_ogm_packet *batadv_ogm_packet; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 307 | int aggregated_bytes = forw_packet->packet_len + packet_len; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 308 | struct batadv_hard_iface *primary_if = NULL; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 309 | bool res = false; |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 310 | unsigned long aggregation_end_time; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 311 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 312 | batadv_ogm_packet = (struct batadv_ogm_packet *)forw_packet->skb->data; |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 313 | aggregation_end_time = send_time; |
| 314 | aggregation_end_time += msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 315 | |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 316 | /* we can aggregate the current packet to this aggregated packet |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 317 | * if: |
| 318 | * |
| 319 | * - the send time is within our MAX_AGGREGATION_MS time |
| 320 | * - the resulting packet wont be bigger than |
| 321 | * MAX_AGGREGATION_BYTES |
| 322 | */ |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 323 | if (time_before(send_time, forw_packet->send_time) && |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 324 | time_after_eq(aggregation_end_time, forw_packet->send_time) && |
| 325 | (aggregated_bytes <= BATADV_MAX_AGGREGATION_BYTES)) { |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 326 | /* check aggregation compatibility |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 327 | * -> direct link packets are broadcasted on |
| 328 | * their interface only |
| 329 | * -> aggregate packet if the current packet is |
| 330 | * a "global" packet as well as the base |
| 331 | * packet |
| 332 | */ |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 333 | primary_if = batadv_primary_if_get_selected(bat_priv); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 334 | if (!primary_if) |
| 335 | goto out; |
| 336 | |
| 337 | /* packets without direct link flag and high TTL |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 338 | * are flooded through the net |
| 339 | */ |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 340 | if ((!directlink) && |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 341 | (!(batadv_ogm_packet->flags & BATADV_DIRECTLINK)) && |
| 342 | (batadv_ogm_packet->header.ttl != 1) && |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 343 | |
| 344 | /* own packets originating non-primary |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 345 | * interfaces leave only that interface |
| 346 | */ |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 347 | ((!forw_packet->own) || |
| 348 | (forw_packet->if_incoming == primary_if))) { |
| 349 | res = true; |
| 350 | goto out; |
| 351 | } |
| 352 | |
| 353 | /* if the incoming packet is sent via this one |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 354 | * interface only - we still can aggregate |
| 355 | */ |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 356 | if ((directlink) && |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 357 | (new_bat_ogm_packet->header.ttl == 1) && |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 358 | (forw_packet->if_incoming == if_incoming) && |
| 359 | |
| 360 | /* packets from direct neighbors or |
| 361 | * own secondary interface packets |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 362 | * (= secondary interface packets in general) |
| 363 | */ |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 364 | (batadv_ogm_packet->flags & BATADV_DIRECTLINK || |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 365 | (forw_packet->own && |
| 366 | forw_packet->if_incoming != primary_if))) { |
| 367 | res = true; |
| 368 | goto out; |
| 369 | } |
| 370 | } |
| 371 | |
| 372 | out: |
| 373 | if (primary_if) |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 374 | batadv_hardif_free_ref(primary_if); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 375 | return res; |
| 376 | } |
| 377 | |
| 378 | /* create a new aggregated packet and add this packet to it */ |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 379 | static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff, |
| 380 | int packet_len, unsigned long send_time, |
| 381 | bool direct_link, |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 382 | struct batadv_hard_iface *if_incoming, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 383 | int own_packet) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 384 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 385 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
| 386 | struct batadv_forw_packet *forw_packet_aggr; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 387 | unsigned char *skb_buff; |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 388 | unsigned int skb_size; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 389 | |
| 390 | if (!atomic_inc_not_zero(&if_incoming->refcount)) |
| 391 | return; |
| 392 | |
| 393 | /* own packet should always be scheduled */ |
| 394 | if (!own_packet) { |
Sven Eckelmann | 3e34819 | 2012-05-16 20:23:22 +0200 | [diff] [blame] | 395 | if (!batadv_atomic_dec_not_zero(&bat_priv->batman_queue_left)) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 396 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 397 | "batman packet queue full\n"); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 398 | goto out; |
| 399 | } |
| 400 | } |
| 401 | |
| 402 | forw_packet_aggr = kmalloc(sizeof(*forw_packet_aggr), GFP_ATOMIC); |
| 403 | if (!forw_packet_aggr) { |
| 404 | if (!own_packet) |
| 405 | atomic_inc(&bat_priv->batman_queue_left); |
| 406 | goto out; |
| 407 | } |
| 408 | |
| 409 | if ((atomic_read(&bat_priv->aggregated_ogms)) && |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 410 | (packet_len < BATADV_MAX_AGGREGATION_BYTES)) |
Sven Eckelmann | 5b24657 | 2012-11-04 17:11:45 +0100 | [diff] [blame] | 411 | skb_size = BATADV_MAX_AGGREGATION_BYTES; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 412 | else |
Sven Eckelmann | 5b24657 | 2012-11-04 17:11:45 +0100 | [diff] [blame] | 413 | skb_size = packet_len; |
| 414 | |
| 415 | skb_size += ETH_HLEN + NET_IP_ALIGN; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 416 | |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 417 | forw_packet_aggr->skb = dev_alloc_skb(skb_size); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 418 | if (!forw_packet_aggr->skb) { |
| 419 | if (!own_packet) |
| 420 | atomic_inc(&bat_priv->batman_queue_left); |
| 421 | kfree(forw_packet_aggr); |
| 422 | goto out; |
| 423 | } |
Sven Eckelmann | 5b24657 | 2012-11-04 17:11:45 +0100 | [diff] [blame] | 424 | skb_reserve(forw_packet_aggr->skb, ETH_HLEN + NET_IP_ALIGN); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 425 | |
| 426 | INIT_HLIST_NODE(&forw_packet_aggr->list); |
| 427 | |
| 428 | skb_buff = skb_put(forw_packet_aggr->skb, packet_len); |
| 429 | forw_packet_aggr->packet_len = packet_len; |
| 430 | memcpy(skb_buff, packet_buff, packet_len); |
| 431 | |
| 432 | forw_packet_aggr->own = own_packet; |
| 433 | forw_packet_aggr->if_incoming = if_incoming; |
| 434 | forw_packet_aggr->num_packets = 0; |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 435 | forw_packet_aggr->direct_link_flags = BATADV_NO_FLAGS; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 436 | forw_packet_aggr->send_time = send_time; |
| 437 | |
| 438 | /* save packet direct link flag status */ |
| 439 | if (direct_link) |
| 440 | forw_packet_aggr->direct_link_flags |= 1; |
| 441 | |
| 442 | /* add new packet to packet list */ |
| 443 | spin_lock_bh(&bat_priv->forw_bat_list_lock); |
| 444 | hlist_add_head(&forw_packet_aggr->list, &bat_priv->forw_bat_list); |
| 445 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); |
| 446 | |
| 447 | /* start timer for this packet */ |
| 448 | INIT_DELAYED_WORK(&forw_packet_aggr->delayed_work, |
Sven Eckelmann | 9455e34 | 2012-05-12 02:09:37 +0200 | [diff] [blame] | 449 | batadv_send_outstanding_bat_ogm_packet); |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 450 | queue_delayed_work(batadv_event_workqueue, |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 451 | &forw_packet_aggr->delayed_work, |
| 452 | send_time - jiffies); |
| 453 | |
| 454 | return; |
| 455 | out: |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 456 | batadv_hardif_free_ref(if_incoming); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 457 | } |
| 458 | |
| 459 | /* aggregate a new packet into the existing ogm packet */ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 460 | static void batadv_iv_ogm_aggregate(struct batadv_forw_packet *forw_packet_aggr, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 461 | const unsigned char *packet_buff, |
| 462 | int packet_len, bool direct_link) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 463 | { |
| 464 | unsigned char *skb_buff; |
Sven Eckelmann | 8de47de | 2012-07-08 16:32:09 +0200 | [diff] [blame] | 465 | unsigned long new_direct_link_flag; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 466 | |
| 467 | skb_buff = skb_put(forw_packet_aggr->skb, packet_len); |
| 468 | memcpy(skb_buff, packet_buff, packet_len); |
| 469 | forw_packet_aggr->packet_len += packet_len; |
| 470 | forw_packet_aggr->num_packets++; |
| 471 | |
| 472 | /* save packet direct link flag status */ |
Sven Eckelmann | 8de47de | 2012-07-08 16:32:09 +0200 | [diff] [blame] | 473 | if (direct_link) { |
| 474 | new_direct_link_flag = BIT(forw_packet_aggr->num_packets); |
| 475 | forw_packet_aggr->direct_link_flags |= new_direct_link_flag; |
| 476 | } |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 477 | } |
| 478 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 479 | static void batadv_iv_ogm_queue_add(struct batadv_priv *bat_priv, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 480 | unsigned char *packet_buff, |
| 481 | int packet_len, |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 482 | struct batadv_hard_iface *if_incoming, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 483 | int own_packet, unsigned long send_time) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 484 | { |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 485 | /* _aggr -> pointer to the packet we want to aggregate with |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 486 | * _pos -> pointer to the position in the queue |
| 487 | */ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 488 | struct batadv_forw_packet *forw_packet_aggr = NULL; |
| 489 | struct batadv_forw_packet *forw_packet_pos = NULL; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 490 | struct batadv_ogm_packet *batadv_ogm_packet; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 491 | bool direct_link; |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 492 | unsigned long max_aggregation_jiffies; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 493 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 494 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_buff; |
| 495 | direct_link = batadv_ogm_packet->flags & BATADV_DIRECTLINK ? 1 : 0; |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 496 | max_aggregation_jiffies = msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 497 | |
| 498 | /* find position for the packet in the forward queue */ |
| 499 | spin_lock_bh(&bat_priv->forw_bat_list_lock); |
| 500 | /* own packets are not to be aggregated */ |
| 501 | if ((atomic_read(&bat_priv->aggregated_ogms)) && (!own_packet)) { |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 502 | hlist_for_each_entry(forw_packet_pos, |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 503 | &bat_priv->forw_bat_list, list) { |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 504 | if (batadv_iv_ogm_can_aggregate(batadv_ogm_packet, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 505 | bat_priv, packet_len, |
| 506 | send_time, direct_link, |
| 507 | if_incoming, |
| 508 | forw_packet_pos)) { |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 509 | forw_packet_aggr = forw_packet_pos; |
| 510 | break; |
| 511 | } |
| 512 | } |
| 513 | } |
| 514 | |
| 515 | /* nothing to aggregate with - either aggregation disabled or no |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 516 | * suitable aggregation packet found |
| 517 | */ |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 518 | if (!forw_packet_aggr) { |
| 519 | /* the following section can run without the lock */ |
| 520 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); |
| 521 | |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 522 | /* if we could not aggregate this packet with one of the others |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 523 | * we hold it back for a while, so that it might be aggregated |
| 524 | * later on |
| 525 | */ |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 526 | if (!own_packet && atomic_read(&bat_priv->aggregated_ogms)) |
| 527 | send_time += max_aggregation_jiffies; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 528 | |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 529 | batadv_iv_ogm_aggregate_new(packet_buff, packet_len, |
| 530 | send_time, direct_link, |
| 531 | if_incoming, own_packet); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 532 | } else { |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 533 | batadv_iv_ogm_aggregate(forw_packet_aggr, packet_buff, |
| 534 | packet_len, direct_link); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 535 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); |
| 536 | } |
| 537 | } |
| 538 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 539 | static void batadv_iv_ogm_forward(struct batadv_orig_node *orig_node, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 540 | const struct ethhdr *ethhdr, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 541 | struct batadv_ogm_packet *batadv_ogm_packet, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 542 | bool is_single_hop_neigh, |
| 543 | bool is_from_best_next_hop, |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 544 | struct batadv_hard_iface *if_incoming) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 545 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 546 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 547 | uint8_t tt_num_changes; |
| 548 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 549 | if (batadv_ogm_packet->header.ttl <= 1) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 550 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, "ttl exceeded\n"); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 551 | return; |
| 552 | } |
| 553 | |
Marek Lindner | 13b2541 | 2012-03-11 06:17:53 +0800 | [diff] [blame] | 554 | if (!is_from_best_next_hop) { |
| 555 | /* Mark the forwarded packet when it is not coming from our |
| 556 | * best next hop. We still need to forward the packet for our |
| 557 | * neighbor link quality detection to work in case the packet |
| 558 | * originated from a single hop neighbor. Otherwise we can |
| 559 | * simply drop the ogm. |
| 560 | */ |
| 561 | if (is_single_hop_neigh) |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 562 | batadv_ogm_packet->flags |= BATADV_NOT_BEST_NEXT_HOP; |
Marek Lindner | 13b2541 | 2012-03-11 06:17:53 +0800 | [diff] [blame] | 563 | else |
| 564 | return; |
| 565 | } |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 566 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 567 | tt_num_changes = batadv_ogm_packet->tt_num_changes; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 568 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 569 | batadv_ogm_packet->header.ttl--; |
| 570 | memcpy(batadv_ogm_packet->prev_sender, ethhdr->h_source, ETH_ALEN); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 571 | |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 572 | /* apply hop penalty */ |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 573 | batadv_ogm_packet->tq = batadv_hop_penalty(batadv_ogm_packet->tq, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 574 | bat_priv); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 575 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 576 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 577 | "Forwarding packet: tq: %i, ttl: %i\n", |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 578 | batadv_ogm_packet->tq, batadv_ogm_packet->header.ttl); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 579 | |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 580 | /* switch of primaries first hop flag when forwarding */ |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 581 | batadv_ogm_packet->flags &= ~BATADV_PRIMARIES_FIRST_HOP; |
Marek Lindner | 75cd33f | 2012-03-01 15:35:16 +0800 | [diff] [blame] | 582 | if (is_single_hop_neigh) |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 583 | batadv_ogm_packet->flags |= BATADV_DIRECTLINK; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 584 | else |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 585 | batadv_ogm_packet->flags &= ~BATADV_DIRECTLINK; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 586 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 587 | batadv_iv_ogm_queue_add(bat_priv, (unsigned char *)batadv_ogm_packet, |
Sven Eckelmann | 7e071c7 | 2012-06-03 22:19:13 +0200 | [diff] [blame] | 588 | BATADV_OGM_HLEN + batadv_tt_len(tt_num_changes), |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 589 | if_incoming, 0, batadv_iv_ogm_fwd_send_time()); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 590 | } |
| 591 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 592 | static void batadv_iv_ogm_schedule(struct batadv_hard_iface *hard_iface) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 593 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 594 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 595 | unsigned char **ogm_buff = &hard_iface->bat_iv.ogm_buff; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 596 | struct batadv_ogm_packet *batadv_ogm_packet; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 597 | struct batadv_hard_iface *primary_if; |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 598 | int *ogm_buff_len = &hard_iface->bat_iv.ogm_buff_len; |
Marek Lindner | be9aa4c | 2012-05-07 04:22:05 +0800 | [diff] [blame] | 599 | int vis_server, tt_num_changes = 0; |
Sven Eckelmann | bbb1f90 | 2012-07-08 17:13:15 +0200 | [diff] [blame] | 600 | uint32_t seqno; |
| 601 | uint8_t bandwidth; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 602 | |
| 603 | vis_server = atomic_read(&bat_priv->vis_mode); |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 604 | primary_if = batadv_primary_if_get_selected(bat_priv); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 605 | |
Marek Lindner | be9aa4c | 2012-05-07 04:22:05 +0800 | [diff] [blame] | 606 | if (hard_iface == primary_if) |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 607 | tt_num_changes = batadv_tt_append_diff(bat_priv, ogm_buff, |
| 608 | ogm_buff_len, |
Sven Eckelmann | 7e071c7 | 2012-06-03 22:19:13 +0200 | [diff] [blame] | 609 | BATADV_OGM_HLEN); |
Marek Lindner | be9aa4c | 2012-05-07 04:22:05 +0800 | [diff] [blame] | 610 | |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 611 | batadv_ogm_packet = (struct batadv_ogm_packet *)(*ogm_buff); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 612 | |
| 613 | /* change sequence number to network order */ |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 614 | seqno = (uint32_t)atomic_read(&hard_iface->bat_iv.ogm_seqno); |
Sven Eckelmann | bbb1f90 | 2012-07-08 17:13:15 +0200 | [diff] [blame] | 615 | batadv_ogm_packet->seqno = htonl(seqno); |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 616 | atomic_inc(&hard_iface->bat_iv.ogm_seqno); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 617 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 618 | batadv_ogm_packet->ttvn = atomic_read(&bat_priv->tt.vn); |
| 619 | batadv_ogm_packet->tt_crc = htons(bat_priv->tt.local_crc); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 620 | if (tt_num_changes >= 0) |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 621 | batadv_ogm_packet->tt_num_changes = tt_num_changes; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 622 | |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 623 | if (vis_server == BATADV_VIS_TYPE_SERVER_SYNC) |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 624 | batadv_ogm_packet->flags |= BATADV_VIS_SERVER; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 625 | else |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 626 | batadv_ogm_packet->flags &= ~BATADV_VIS_SERVER; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 627 | |
Sven Eckelmann | bbb1f90 | 2012-07-08 17:13:15 +0200 | [diff] [blame] | 628 | if (hard_iface == primary_if && |
| 629 | atomic_read(&bat_priv->gw_mode) == BATADV_GW_MODE_SERVER) { |
| 630 | bandwidth = (uint8_t)atomic_read(&bat_priv->gw_bandwidth); |
| 631 | batadv_ogm_packet->gw_flags = bandwidth; |
| 632 | } else { |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 633 | batadv_ogm_packet->gw_flags = BATADV_NO_FLAGS; |
Sven Eckelmann | bbb1f90 | 2012-07-08 17:13:15 +0200 | [diff] [blame] | 634 | } |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 635 | |
Sven Eckelmann | 30d3c51 | 2012-05-12 02:09:36 +0200 | [diff] [blame] | 636 | batadv_slide_own_bcast_window(hard_iface); |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 637 | batadv_iv_ogm_queue_add(bat_priv, hard_iface->bat_iv.ogm_buff, |
| 638 | hard_iface->bat_iv.ogm_buff_len, hard_iface, 1, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 639 | batadv_iv_ogm_emit_send_time(bat_priv)); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 640 | |
| 641 | if (primary_if) |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 642 | batadv_hardif_free_ref(primary_if); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 643 | } |
| 644 | |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 645 | static void |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 646 | batadv_iv_ogm_orig_update(struct batadv_priv *bat_priv, |
| 647 | struct batadv_orig_node *orig_node, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 648 | const struct ethhdr *ethhdr, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 649 | const struct batadv_ogm_packet *batadv_ogm_packet, |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 650 | struct batadv_hard_iface *if_incoming, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 651 | const unsigned char *tt_buff, |
| 652 | int is_duplicate) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 653 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 654 | struct batadv_neigh_node *neigh_node = NULL, *tmp_neigh_node = NULL; |
| 655 | struct batadv_neigh_node *router = NULL; |
| 656 | struct batadv_orig_node *orig_node_tmp; |
Linus LĂĽssing | 7caf69f | 2012-09-18 03:01:08 +0200 | [diff] [blame] | 657 | int if_num; |
Sven Eckelmann | bbb1f90 | 2012-07-08 17:13:15 +0200 | [diff] [blame] | 658 | uint8_t sum_orig, sum_neigh; |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 659 | uint8_t *neigh_addr; |
Sven Eckelmann | bbb1f90 | 2012-07-08 17:13:15 +0200 | [diff] [blame] | 660 | uint8_t tq_avg; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 661 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 662 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 663 | "update_originator(): Searching and updating originator entry of received packet\n"); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 664 | |
| 665 | rcu_read_lock(); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 666 | hlist_for_each_entry_rcu(tmp_neigh_node, |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 667 | &orig_node->neigh_list, list) { |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 668 | neigh_addr = tmp_neigh_node->addr; |
| 669 | if (batadv_compare_eth(neigh_addr, ethhdr->h_source) && |
| 670 | tmp_neigh_node->if_incoming == if_incoming && |
| 671 | atomic_inc_not_zero(&tmp_neigh_node->refcount)) { |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 672 | if (neigh_node) |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 673 | batadv_neigh_node_free_ref(neigh_node); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 674 | neigh_node = tmp_neigh_node; |
| 675 | continue; |
| 676 | } |
| 677 | |
| 678 | if (is_duplicate) |
| 679 | continue; |
| 680 | |
Marek Lindner | e3b0d0d | 2012-03-17 15:28:32 +0800 | [diff] [blame] | 681 | spin_lock_bh(&tmp_neigh_node->lq_update_lock); |
Sven Eckelmann | 925a667 | 2012-05-12 02:09:35 +0200 | [diff] [blame] | 682 | batadv_ring_buffer_set(tmp_neigh_node->tq_recv, |
| 683 | &tmp_neigh_node->tq_index, 0); |
Sven Eckelmann | bbb1f90 | 2012-07-08 17:13:15 +0200 | [diff] [blame] | 684 | tq_avg = batadv_ring_buffer_avg(tmp_neigh_node->tq_recv); |
| 685 | tmp_neigh_node->tq_avg = tq_avg; |
Marek Lindner | e3b0d0d | 2012-03-17 15:28:32 +0800 | [diff] [blame] | 686 | spin_unlock_bh(&tmp_neigh_node->lq_update_lock); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 687 | } |
| 688 | |
| 689 | if (!neigh_node) { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 690 | struct batadv_orig_node *orig_tmp; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 691 | |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 692 | orig_tmp = batadv_get_orig_node(bat_priv, ethhdr->h_source); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 693 | if (!orig_tmp) |
| 694 | goto unlock; |
| 695 | |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 696 | neigh_node = batadv_iv_ogm_neigh_new(if_incoming, |
| 697 | ethhdr->h_source, |
| 698 | orig_node, orig_tmp, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 699 | batadv_ogm_packet->seqno); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 700 | |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 701 | batadv_orig_node_free_ref(orig_tmp); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 702 | if (!neigh_node) |
| 703 | goto unlock; |
| 704 | } else |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 705 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 706 | "Updating existing last-hop neighbor of originator\n"); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 707 | |
| 708 | rcu_read_unlock(); |
| 709 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 710 | orig_node->flags = batadv_ogm_packet->flags; |
Marek Lindner | d7b2a97 | 2012-03-01 15:35:19 +0800 | [diff] [blame] | 711 | neigh_node->last_seen = jiffies; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 712 | |
Marek Lindner | e3b0d0d | 2012-03-17 15:28:32 +0800 | [diff] [blame] | 713 | spin_lock_bh(&neigh_node->lq_update_lock); |
Sven Eckelmann | 925a667 | 2012-05-12 02:09:35 +0200 | [diff] [blame] | 714 | batadv_ring_buffer_set(neigh_node->tq_recv, |
| 715 | &neigh_node->tq_index, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 716 | batadv_ogm_packet->tq); |
Sven Eckelmann | 925a667 | 2012-05-12 02:09:35 +0200 | [diff] [blame] | 717 | neigh_node->tq_avg = batadv_ring_buffer_avg(neigh_node->tq_recv); |
Marek Lindner | e3b0d0d | 2012-03-17 15:28:32 +0800 | [diff] [blame] | 718 | spin_unlock_bh(&neigh_node->lq_update_lock); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 719 | |
| 720 | if (!is_duplicate) { |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 721 | orig_node->last_ttl = batadv_ogm_packet->header.ttl; |
| 722 | neigh_node->last_ttl = batadv_ogm_packet->header.ttl; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 723 | } |
| 724 | |
Sven Eckelmann | 30d3c51 | 2012-05-12 02:09:36 +0200 | [diff] [blame] | 725 | batadv_bonding_candidate_add(orig_node, neigh_node); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 726 | |
| 727 | /* if this neighbor already is our next hop there is nothing |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 728 | * to change |
| 729 | */ |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 730 | router = batadv_orig_node_get_router(orig_node); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 731 | if (router == neigh_node) |
| 732 | goto update_tt; |
| 733 | |
| 734 | /* if this neighbor does not offer a better TQ we won't consider it */ |
| 735 | if (router && (router->tq_avg > neigh_node->tq_avg)) |
| 736 | goto update_tt; |
| 737 | |
| 738 | /* if the TQ is the same and the link not more symmetric we |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 739 | * won't consider it either |
| 740 | */ |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 741 | if (router && (neigh_node->tq_avg == router->tq_avg)) { |
| 742 | orig_node_tmp = router->orig_node; |
| 743 | spin_lock_bh(&orig_node_tmp->ogm_cnt_lock); |
Linus LĂĽssing | 7caf69f | 2012-09-18 03:01:08 +0200 | [diff] [blame] | 744 | if_num = router->if_incoming->if_num; |
| 745 | sum_orig = orig_node_tmp->bcast_own_sum[if_num]; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 746 | spin_unlock_bh(&orig_node_tmp->ogm_cnt_lock); |
| 747 | |
| 748 | orig_node_tmp = neigh_node->orig_node; |
| 749 | spin_lock_bh(&orig_node_tmp->ogm_cnt_lock); |
Linus LĂĽssing | 7caf69f | 2012-09-18 03:01:08 +0200 | [diff] [blame] | 750 | if_num = neigh_node->if_incoming->if_num; |
| 751 | sum_neigh = orig_node_tmp->bcast_own_sum[if_num]; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 752 | spin_unlock_bh(&orig_node_tmp->ogm_cnt_lock); |
| 753 | |
Sven Eckelmann | bbb1f90 | 2012-07-08 17:13:15 +0200 | [diff] [blame] | 754 | if (sum_orig >= sum_neigh) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 755 | goto update_tt; |
| 756 | } |
| 757 | |
Sven Eckelmann | 30d3c51 | 2012-05-12 02:09:36 +0200 | [diff] [blame] | 758 | batadv_update_route(bat_priv, orig_node, neigh_node); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 759 | |
| 760 | update_tt: |
| 761 | /* I have to check for transtable changes only if the OGM has been |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 762 | * sent through a primary interface |
| 763 | */ |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 764 | if (((batadv_ogm_packet->orig != ethhdr->h_source) && |
| 765 | (batadv_ogm_packet->header.ttl > 2)) || |
| 766 | (batadv_ogm_packet->flags & BATADV_PRIMARIES_FIRST_HOP)) |
Sven Eckelmann | 08c36d3 | 2012-05-12 02:09:39 +0200 | [diff] [blame] | 767 | batadv_tt_update_orig(bat_priv, orig_node, tt_buff, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 768 | batadv_ogm_packet->tt_num_changes, |
| 769 | batadv_ogm_packet->ttvn, |
| 770 | ntohs(batadv_ogm_packet->tt_crc)); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 771 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 772 | if (orig_node->gw_flags != batadv_ogm_packet->gw_flags) |
Sven Eckelmann | 7cf06bc | 2012-05-12 02:09:29 +0200 | [diff] [blame] | 773 | batadv_gw_node_update(bat_priv, orig_node, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 774 | batadv_ogm_packet->gw_flags); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 775 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 776 | orig_node->gw_flags = batadv_ogm_packet->gw_flags; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 777 | |
| 778 | /* restart gateway selection if fast or late switching was enabled */ |
| 779 | if ((orig_node->gw_flags) && |
Sven Eckelmann | cd646ab | 2012-06-03 22:19:18 +0200 | [diff] [blame] | 780 | (atomic_read(&bat_priv->gw_mode) == BATADV_GW_MODE_CLIENT) && |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 781 | (atomic_read(&bat_priv->gw_sel_class) > 2)) |
Sven Eckelmann | 7cf06bc | 2012-05-12 02:09:29 +0200 | [diff] [blame] | 782 | batadv_gw_check_election(bat_priv, orig_node); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 783 | |
| 784 | goto out; |
| 785 | |
| 786 | unlock: |
| 787 | rcu_read_unlock(); |
| 788 | out: |
| 789 | if (neigh_node) |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 790 | batadv_neigh_node_free_ref(neigh_node); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 791 | if (router) |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 792 | batadv_neigh_node_free_ref(router); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 793 | } |
| 794 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 795 | static int batadv_iv_ogm_calc_tq(struct batadv_orig_node *orig_node, |
| 796 | struct batadv_orig_node *orig_neigh_node, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 797 | struct batadv_ogm_packet *batadv_ogm_packet, |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 798 | struct batadv_hard_iface *if_incoming) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 799 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 800 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
| 801 | struct batadv_neigh_node *neigh_node = NULL, *tmp_neigh_node; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 802 | uint8_t total_count; |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 803 | uint8_t orig_eq_count, neigh_rq_count, neigh_rq_inv, tq_own; |
| 804 | unsigned int neigh_rq_inv_cube, neigh_rq_max_cube; |
| 805 | int tq_asym_penalty, inv_asym_penalty, ret = 0; |
| 806 | unsigned int combined_tq; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 807 | |
| 808 | /* find corresponding one hop neighbor */ |
| 809 | rcu_read_lock(); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 810 | hlist_for_each_entry_rcu(tmp_neigh_node, |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 811 | &orig_neigh_node->neigh_list, list) { |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 812 | if (!batadv_compare_eth(tmp_neigh_node->addr, |
| 813 | orig_neigh_node->orig)) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 814 | continue; |
| 815 | |
| 816 | if (tmp_neigh_node->if_incoming != if_incoming) |
| 817 | continue; |
| 818 | |
| 819 | if (!atomic_inc_not_zero(&tmp_neigh_node->refcount)) |
| 820 | continue; |
| 821 | |
| 822 | neigh_node = tmp_neigh_node; |
| 823 | break; |
| 824 | } |
| 825 | rcu_read_unlock(); |
| 826 | |
| 827 | if (!neigh_node) |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 828 | neigh_node = batadv_iv_ogm_neigh_new(if_incoming, |
| 829 | orig_neigh_node->orig, |
| 830 | orig_neigh_node, |
| 831 | orig_neigh_node, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 832 | batadv_ogm_packet->seqno); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 833 | |
| 834 | if (!neigh_node) |
| 835 | goto out; |
| 836 | |
Marek Lindner | d7b2a97 | 2012-03-01 15:35:19 +0800 | [diff] [blame] | 837 | /* if orig_node is direct neighbor update neigh_node last_seen */ |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 838 | if (orig_node == orig_neigh_node) |
Marek Lindner | d7b2a97 | 2012-03-01 15:35:19 +0800 | [diff] [blame] | 839 | neigh_node->last_seen = jiffies; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 840 | |
Marek Lindner | d7b2a97 | 2012-03-01 15:35:19 +0800 | [diff] [blame] | 841 | orig_node->last_seen = jiffies; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 842 | |
| 843 | /* find packet count of corresponding one hop neighbor */ |
| 844 | spin_lock_bh(&orig_node->ogm_cnt_lock); |
| 845 | orig_eq_count = orig_neigh_node->bcast_own_sum[if_incoming->if_num]; |
| 846 | neigh_rq_count = neigh_node->real_packet_count; |
| 847 | spin_unlock_bh(&orig_node->ogm_cnt_lock); |
| 848 | |
| 849 | /* pay attention to not get a value bigger than 100 % */ |
Sven Eckelmann | c67893d | 2012-07-08 18:33:51 +0200 | [diff] [blame] | 850 | if (orig_eq_count > neigh_rq_count) |
| 851 | total_count = neigh_rq_count; |
| 852 | else |
| 853 | total_count = orig_eq_count; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 854 | |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 855 | /* if we have too few packets (too less data) we set tq_own to zero |
| 856 | * if we receive too few packets it is not considered bidirectional |
| 857 | */ |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 858 | if (total_count < BATADV_TQ_LOCAL_BIDRECT_SEND_MINIMUM || |
| 859 | neigh_rq_count < BATADV_TQ_LOCAL_BIDRECT_RECV_MINIMUM) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 860 | tq_own = 0; |
| 861 | else |
| 862 | /* neigh_node->real_packet_count is never zero as we |
| 863 | * only purge old information when getting new |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 864 | * information |
| 865 | */ |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 866 | tq_own = (BATADV_TQ_MAX_VALUE * total_count) / neigh_rq_count; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 867 | |
Sven Eckelmann | 21a1236 | 2012-03-07 09:07:46 +0100 | [diff] [blame] | 868 | /* 1 - ((1-x) ** 3), normalized to TQ_MAX_VALUE this does |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 869 | * affect the nearly-symmetric links only a little, but |
| 870 | * punishes asymmetric links more. This will give a value |
| 871 | * between 0 and TQ_MAX_VALUE |
| 872 | */ |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 873 | neigh_rq_inv = BATADV_TQ_LOCAL_WINDOW_SIZE - neigh_rq_count; |
| 874 | neigh_rq_inv_cube = neigh_rq_inv * neigh_rq_inv * neigh_rq_inv; |
| 875 | neigh_rq_max_cube = BATADV_TQ_LOCAL_WINDOW_SIZE * |
| 876 | BATADV_TQ_LOCAL_WINDOW_SIZE * |
| 877 | BATADV_TQ_LOCAL_WINDOW_SIZE; |
| 878 | inv_asym_penalty = BATADV_TQ_MAX_VALUE * neigh_rq_inv_cube; |
| 879 | inv_asym_penalty /= neigh_rq_max_cube; |
| 880 | tq_asym_penalty = BATADV_TQ_MAX_VALUE - inv_asym_penalty; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 881 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 882 | combined_tq = batadv_ogm_packet->tq * tq_own * tq_asym_penalty; |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 883 | combined_tq /= BATADV_TQ_MAX_VALUE * BATADV_TQ_MAX_VALUE; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 884 | batadv_ogm_packet->tq = combined_tq; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 885 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 886 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 887 | "bidirectional: orig = %-15pM neigh = %-15pM => own_bcast = %2i, real recv = %2i, local tq: %3i, asym_penalty: %3i, total tq: %3i\n", |
| 888 | orig_node->orig, orig_neigh_node->orig, total_count, |
| 889 | neigh_rq_count, tq_own, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 890 | tq_asym_penalty, batadv_ogm_packet->tq); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 891 | |
| 892 | /* if link has the minimum required transmission quality |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 893 | * consider it bidirectional |
| 894 | */ |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 895 | if (batadv_ogm_packet->tq >= BATADV_TQ_TOTAL_BIDRECT_LIMIT) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 896 | ret = 1; |
| 897 | |
| 898 | out: |
| 899 | if (neigh_node) |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 900 | batadv_neigh_node_free_ref(neigh_node); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 901 | return ret; |
| 902 | } |
| 903 | |
| 904 | /* processes a batman packet for all interfaces, adjusts the sequence number and |
| 905 | * finds out whether it is a duplicate. |
| 906 | * returns: |
| 907 | * 1 the packet is a duplicate |
| 908 | * 0 the packet has not yet been received |
| 909 | * -1 the packet is old and has been received while the seqno window |
| 910 | * was protected. Caller should drop it. |
| 911 | */ |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 912 | static int |
| 913 | batadv_iv_ogm_update_seqnos(const struct ethhdr *ethhdr, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 914 | const struct batadv_ogm_packet *batadv_ogm_packet, |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 915 | const struct batadv_hard_iface *if_incoming) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 916 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 917 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
| 918 | struct batadv_orig_node *orig_node; |
| 919 | struct batadv_neigh_node *tmp_neigh_node; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 920 | int is_duplicate = 0; |
| 921 | int32_t seq_diff; |
| 922 | int need_update = 0; |
| 923 | int set_mark, ret = -1; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 924 | uint32_t seqno = ntohl(batadv_ogm_packet->seqno); |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 925 | uint8_t *neigh_addr; |
Sven Eckelmann | bbb1f90 | 2012-07-08 17:13:15 +0200 | [diff] [blame] | 926 | uint8_t packet_count; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 927 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 928 | orig_node = batadv_get_orig_node(bat_priv, batadv_ogm_packet->orig); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 929 | if (!orig_node) |
| 930 | return 0; |
| 931 | |
| 932 | spin_lock_bh(&orig_node->ogm_cnt_lock); |
Al Viro | e0f5211 | 2012-04-22 07:46:29 +0100 | [diff] [blame] | 933 | seq_diff = seqno - orig_node->last_real_seqno; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 934 | |
| 935 | /* signalize caller that the packet is to be dropped. */ |
Antonio Quartulli | 1e5cc26 | 2012-02-26 15:39:42 +0100 | [diff] [blame] | 936 | if (!hlist_empty(&orig_node->neigh_list) && |
Sven Eckelmann | 30d3c51 | 2012-05-12 02:09:36 +0200 | [diff] [blame] | 937 | batadv_window_protected(bat_priv, seq_diff, |
| 938 | &orig_node->batman_seqno_reset)) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 939 | goto out; |
| 940 | |
| 941 | rcu_read_lock(); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 942 | hlist_for_each_entry_rcu(tmp_neigh_node, |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 943 | &orig_node->neigh_list, list) { |
Sven Eckelmann | 9b4a115 | 2012-05-12 13:48:53 +0200 | [diff] [blame] | 944 | is_duplicate |= batadv_test_bit(tmp_neigh_node->real_bits, |
| 945 | orig_node->last_real_seqno, |
| 946 | seqno); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 947 | |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 948 | neigh_addr = tmp_neigh_node->addr; |
| 949 | if (batadv_compare_eth(neigh_addr, ethhdr->h_source) && |
| 950 | tmp_neigh_node->if_incoming == if_incoming) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 951 | set_mark = 1; |
| 952 | else |
| 953 | set_mark = 0; |
| 954 | |
| 955 | /* if the window moved, set the update flag. */ |
Sven Eckelmann | 0f5f932 | 2012-05-12 02:09:25 +0200 | [diff] [blame] | 956 | need_update |= batadv_bit_get_packet(bat_priv, |
| 957 | tmp_neigh_node->real_bits, |
| 958 | seq_diff, set_mark); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 959 | |
Sven Eckelmann | bbb1f90 | 2012-07-08 17:13:15 +0200 | [diff] [blame] | 960 | packet_count = bitmap_weight(tmp_neigh_node->real_bits, |
| 961 | BATADV_TQ_LOCAL_WINDOW_SIZE); |
| 962 | tmp_neigh_node->real_packet_count = packet_count; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 963 | } |
| 964 | rcu_read_unlock(); |
| 965 | |
| 966 | if (need_update) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 967 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 968 | "updating last_seqno: old %u, new %u\n", |
| 969 | orig_node->last_real_seqno, seqno); |
Al Viro | e0f5211 | 2012-04-22 07:46:29 +0100 | [diff] [blame] | 970 | orig_node->last_real_seqno = seqno; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 971 | } |
| 972 | |
| 973 | ret = is_duplicate; |
| 974 | |
| 975 | out: |
| 976 | spin_unlock_bh(&orig_node->ogm_cnt_lock); |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 977 | batadv_orig_node_free_ref(orig_node); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 978 | return ret; |
| 979 | } |
| 980 | |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 981 | static void batadv_iv_ogm_process(const struct ethhdr *ethhdr, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 982 | struct batadv_ogm_packet *batadv_ogm_packet, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 983 | const unsigned char *tt_buff, |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 984 | struct batadv_hard_iface *if_incoming) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 985 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 986 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
| 987 | struct batadv_hard_iface *hard_iface; |
| 988 | struct batadv_orig_node *orig_neigh_node, *orig_node; |
| 989 | struct batadv_neigh_node *router = NULL, *router_router = NULL; |
| 990 | struct batadv_neigh_node *orig_neigh_router = NULL; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 991 | int has_directlink_flag; |
| 992 | int is_my_addr = 0, is_my_orig = 0, is_my_oldorig = 0; |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 993 | int is_broadcast = 0, is_bidirect; |
Marek Lindner | 75cd33f | 2012-03-01 15:35:16 +0800 | [diff] [blame] | 994 | bool is_single_hop_neigh = false; |
Marek Lindner | 13b2541 | 2012-03-11 06:17:53 +0800 | [diff] [blame] | 995 | bool is_from_best_next_hop = false; |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 996 | int is_duplicate, sameseq, simlar_ttl; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 997 | uint32_t if_incoming_seqno; |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 998 | uint8_t *prev_sender; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 999 | |
| 1000 | /* Silently drop when the batman packet is actually not a |
| 1001 | * correct packet. |
| 1002 | * |
| 1003 | * This might happen if a packet is padded (e.g. Ethernet has a |
| 1004 | * minimum frame length of 64 byte) and the aggregation interprets |
| 1005 | * it as an additional length. |
| 1006 | * |
| 1007 | * TODO: A more sane solution would be to have a bit in the |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1008 | * batadv_ogm_packet to detect whether the packet is the last |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1009 | * packet in an aggregation. Here we expect that the padding |
| 1010 | * is always zero (or not 0x01) |
| 1011 | */ |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1012 | if (batadv_ogm_packet->header.packet_type != BATADV_IV_OGM) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1013 | return; |
| 1014 | |
| 1015 | /* could be changed by schedule_own_packet() */ |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 1016 | if_incoming_seqno = atomic_read(&if_incoming->bat_iv.ogm_seqno); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1017 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1018 | if (batadv_ogm_packet->flags & BATADV_DIRECTLINK) |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 1019 | has_directlink_flag = 1; |
| 1020 | else |
| 1021 | has_directlink_flag = 0; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1022 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1023 | if (batadv_compare_eth(ethhdr->h_source, batadv_ogm_packet->orig)) |
Marek Lindner | 75cd33f | 2012-03-01 15:35:16 +0800 | [diff] [blame] | 1024 | is_single_hop_neigh = true; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1025 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1026 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Antonio Quartulli | c0275e2 | 2012-12-11 20:29:22 +0100 | [diff] [blame] | 1027 | "Received BATMAN packet via NB: %pM, IF: %s [%pM] (from OG: %pM, via prev OG: %pM, seqno %u, ttvn %u, crc %#.4x, changes %u, tq %d, TTL %d, V %d, IDF %d)\n", |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1028 | ethhdr->h_source, if_incoming->net_dev->name, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1029 | if_incoming->net_dev->dev_addr, batadv_ogm_packet->orig, |
| 1030 | batadv_ogm_packet->prev_sender, |
| 1031 | ntohl(batadv_ogm_packet->seqno), batadv_ogm_packet->ttvn, |
| 1032 | ntohs(batadv_ogm_packet->tt_crc), |
| 1033 | batadv_ogm_packet->tt_num_changes, batadv_ogm_packet->tq, |
| 1034 | batadv_ogm_packet->header.ttl, |
| 1035 | batadv_ogm_packet->header.version, has_directlink_flag); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1036 | |
| 1037 | rcu_read_lock(); |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 1038 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 1039 | if (hard_iface->if_status != BATADV_IF_ACTIVE) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1040 | continue; |
| 1041 | |
| 1042 | if (hard_iface->soft_iface != if_incoming->soft_iface) |
| 1043 | continue; |
| 1044 | |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1045 | if (batadv_compare_eth(ethhdr->h_source, |
| 1046 | hard_iface->net_dev->dev_addr)) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1047 | is_my_addr = 1; |
| 1048 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1049 | if (batadv_compare_eth(batadv_ogm_packet->orig, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1050 | hard_iface->net_dev->dev_addr)) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1051 | is_my_orig = 1; |
| 1052 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1053 | if (batadv_compare_eth(batadv_ogm_packet->prev_sender, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1054 | hard_iface->net_dev->dev_addr)) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1055 | is_my_oldorig = 1; |
| 1056 | |
| 1057 | if (is_broadcast_ether_addr(ethhdr->h_source)) |
| 1058 | is_broadcast = 1; |
| 1059 | } |
| 1060 | rcu_read_unlock(); |
| 1061 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1062 | if (batadv_ogm_packet->header.version != BATADV_COMPAT_VERSION) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1063 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1064 | "Drop packet: incompatible batman version (%i)\n", |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1065 | batadv_ogm_packet->header.version); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1066 | return; |
| 1067 | } |
| 1068 | |
| 1069 | if (is_my_addr) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1070 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1071 | "Drop packet: received my own broadcast (sender: %pM)\n", |
| 1072 | ethhdr->h_source); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1073 | return; |
| 1074 | } |
| 1075 | |
| 1076 | if (is_broadcast) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1077 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1078 | "Drop packet: ignoring all packets with broadcast source addr (sender: %pM)\n", |
| 1079 | ethhdr->h_source); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1080 | return; |
| 1081 | } |
| 1082 | |
| 1083 | if (is_my_orig) { |
| 1084 | unsigned long *word; |
| 1085 | int offset; |
Sven Eckelmann | 9b4a115 | 2012-05-12 13:48:53 +0200 | [diff] [blame] | 1086 | int32_t bit_pos; |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 1087 | int16_t if_num; |
| 1088 | uint8_t *weight; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1089 | |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 1090 | orig_neigh_node = batadv_get_orig_node(bat_priv, |
| 1091 | ethhdr->h_source); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1092 | if (!orig_neigh_node) |
| 1093 | return; |
| 1094 | |
| 1095 | /* neighbor has to indicate direct link and it has to |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 1096 | * come via the corresponding interface |
| 1097 | * save packet seqno for bidirectional check |
| 1098 | */ |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1099 | if (has_directlink_flag && |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1100 | batadv_compare_eth(if_incoming->net_dev->dev_addr, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1101 | batadv_ogm_packet->orig)) { |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 1102 | if_num = if_incoming->if_num; |
| 1103 | offset = if_num * BATADV_NUM_WORDS; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1104 | |
| 1105 | spin_lock_bh(&orig_neigh_node->ogm_cnt_lock); |
| 1106 | word = &(orig_neigh_node->bcast_own[offset]); |
Sven Eckelmann | 9b4a115 | 2012-05-12 13:48:53 +0200 | [diff] [blame] | 1107 | bit_pos = if_incoming_seqno - 2; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1108 | bit_pos -= ntohl(batadv_ogm_packet->seqno); |
Sven Eckelmann | 9b4a115 | 2012-05-12 13:48:53 +0200 | [diff] [blame] | 1109 | batadv_set_bit(word, bit_pos); |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 1110 | weight = &orig_neigh_node->bcast_own_sum[if_num]; |
| 1111 | *weight = bitmap_weight(word, |
| 1112 | BATADV_TQ_LOCAL_WINDOW_SIZE); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1113 | spin_unlock_bh(&orig_neigh_node->ogm_cnt_lock); |
| 1114 | } |
| 1115 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1116 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1117 | "Drop packet: originator packet from myself (via neighbor)\n"); |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 1118 | batadv_orig_node_free_ref(orig_neigh_node); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1119 | return; |
| 1120 | } |
| 1121 | |
| 1122 | if (is_my_oldorig) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1123 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1124 | "Drop packet: ignoring all rebroadcast echos (sender: %pM)\n", |
| 1125 | ethhdr->h_source); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1126 | return; |
| 1127 | } |
| 1128 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1129 | if (batadv_ogm_packet->flags & BATADV_NOT_BEST_NEXT_HOP) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1130 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1131 | "Drop packet: ignoring all packets not forwarded from the best next hop (sender: %pM)\n", |
| 1132 | ethhdr->h_source); |
Marek Lindner | 13b2541 | 2012-03-11 06:17:53 +0800 | [diff] [blame] | 1133 | return; |
| 1134 | } |
| 1135 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1136 | orig_node = batadv_get_orig_node(bat_priv, batadv_ogm_packet->orig); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1137 | if (!orig_node) |
| 1138 | return; |
| 1139 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1140 | is_duplicate = batadv_iv_ogm_update_seqnos(ethhdr, batadv_ogm_packet, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 1141 | if_incoming); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1142 | |
| 1143 | if (is_duplicate == -1) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1144 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1145 | "Drop packet: packet within seqno protection time (sender: %pM)\n", |
| 1146 | ethhdr->h_source); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1147 | goto out; |
| 1148 | } |
| 1149 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1150 | if (batadv_ogm_packet->tq == 0) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1151 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1152 | "Drop packet: originator packet with tq equal 0\n"); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1153 | goto out; |
| 1154 | } |
| 1155 | |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 1156 | router = batadv_orig_node_get_router(orig_node); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1157 | if (router) |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 1158 | router_router = batadv_orig_node_get_router(router->orig_node); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1159 | |
Marek Lindner | 13b2541 | 2012-03-11 06:17:53 +0800 | [diff] [blame] | 1160 | if ((router && router->tq_avg != 0) && |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1161 | (batadv_compare_eth(router->addr, ethhdr->h_source))) |
Marek Lindner | 13b2541 | 2012-03-11 06:17:53 +0800 | [diff] [blame] | 1162 | is_from_best_next_hop = true; |
| 1163 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1164 | prev_sender = batadv_ogm_packet->prev_sender; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1165 | /* avoid temporary routing loops */ |
| 1166 | if (router && router_router && |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1167 | (batadv_compare_eth(router->addr, prev_sender)) && |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1168 | !(batadv_compare_eth(batadv_ogm_packet->orig, prev_sender)) && |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1169 | (batadv_compare_eth(router->addr, router_router->addr))) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1170 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1171 | "Drop packet: ignoring all rebroadcast packets that may make me loop (sender: %pM)\n", |
| 1172 | ethhdr->h_source); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1173 | goto out; |
| 1174 | } |
| 1175 | |
| 1176 | /* if sender is a direct neighbor the sender mac equals |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 1177 | * originator mac |
| 1178 | */ |
Sven Eckelmann | c67893d | 2012-07-08 18:33:51 +0200 | [diff] [blame] | 1179 | if (is_single_hop_neigh) |
| 1180 | orig_neigh_node = orig_node; |
| 1181 | else |
| 1182 | orig_neigh_node = batadv_get_orig_node(bat_priv, |
| 1183 | ethhdr->h_source); |
| 1184 | |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1185 | if (!orig_neigh_node) |
| 1186 | goto out; |
| 1187 | |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 1188 | orig_neigh_router = batadv_orig_node_get_router(orig_neigh_node); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1189 | |
| 1190 | /* drop packet if sender is not a direct neighbor and if we |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 1191 | * don't route towards it |
| 1192 | */ |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1193 | if (!is_single_hop_neigh && (!orig_neigh_router)) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1194 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1195 | "Drop packet: OGM via unknown neighbor!\n"); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1196 | goto out_neigh; |
| 1197 | } |
| 1198 | |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 1199 | is_bidirect = batadv_iv_ogm_calc_tq(orig_node, orig_neigh_node, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1200 | batadv_ogm_packet, if_incoming); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1201 | |
Sven Eckelmann | 30d3c51 | 2012-05-12 02:09:36 +0200 | [diff] [blame] | 1202 | batadv_bonding_save_primary(orig_node, orig_neigh_node, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1203 | batadv_ogm_packet); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1204 | |
| 1205 | /* update ranking if it is not a duplicate or has the same |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 1206 | * seqno and similar ttl as the non-duplicate |
| 1207 | */ |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1208 | sameseq = orig_node->last_real_seqno == ntohl(batadv_ogm_packet->seqno); |
| 1209 | simlar_ttl = orig_node->last_ttl - 3 <= batadv_ogm_packet->header.ttl; |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 1210 | if (is_bidirect && (!is_duplicate || (sameseq && simlar_ttl))) |
| 1211 | batadv_iv_ogm_orig_update(bat_priv, orig_node, ethhdr, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1212 | batadv_ogm_packet, if_incoming, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 1213 | tt_buff, is_duplicate); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1214 | |
| 1215 | /* is single hop (direct) neighbor */ |
| 1216 | if (is_single_hop_neigh) { |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1217 | /* mark direct link on incoming interface */ |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1218 | batadv_iv_ogm_forward(orig_node, ethhdr, batadv_ogm_packet, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 1219 | is_single_hop_neigh, |
| 1220 | is_from_best_next_hop, if_incoming); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1221 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1222 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1223 | "Forwarding packet: rebroadcast neighbor packet with direct link flag\n"); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1224 | goto out_neigh; |
| 1225 | } |
| 1226 | |
| 1227 | /* multihop originator */ |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 1228 | if (!is_bidirect) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1229 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1230 | "Drop packet: not received via bidirectional link\n"); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1231 | goto out_neigh; |
| 1232 | } |
| 1233 | |
| 1234 | if (is_duplicate) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1235 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1236 | "Drop packet: duplicate packet received\n"); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1237 | goto out_neigh; |
| 1238 | } |
| 1239 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1240 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1241 | "Forwarding packet: rebroadcast originator packet\n"); |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1242 | batadv_iv_ogm_forward(orig_node, ethhdr, batadv_ogm_packet, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 1243 | is_single_hop_neigh, is_from_best_next_hop, |
| 1244 | if_incoming); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1245 | |
| 1246 | out_neigh: |
| 1247 | if ((orig_neigh_node) && (!is_single_hop_neigh)) |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 1248 | batadv_orig_node_free_ref(orig_neigh_node); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1249 | out: |
| 1250 | if (router) |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 1251 | batadv_neigh_node_free_ref(router); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1252 | if (router_router) |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 1253 | batadv_neigh_node_free_ref(router_router); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1254 | if (orig_neigh_router) |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 1255 | batadv_neigh_node_free_ref(orig_neigh_router); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1256 | |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 1257 | batadv_orig_node_free_ref(orig_node); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1258 | } |
| 1259 | |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 1260 | static int batadv_iv_ogm_receive(struct sk_buff *skb, |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1261 | struct batadv_hard_iface *if_incoming) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1262 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1263 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1264 | struct batadv_ogm_packet *batadv_ogm_packet; |
Marek Lindner | 8780dad | 2011-12-05 04:01:51 +0800 | [diff] [blame] | 1265 | struct ethhdr *ethhdr; |
| 1266 | int buff_pos = 0, packet_len; |
| 1267 | unsigned char *tt_buff, *packet_buff; |
Marek Lindner | c3e2931 | 2012-03-04 16:56:25 +0800 | [diff] [blame] | 1268 | bool ret; |
Sven Eckelmann | c67893d | 2012-07-08 18:33:51 +0200 | [diff] [blame] | 1269 | uint8_t *packet_pos; |
Marek Lindner | c3e2931 | 2012-03-04 16:56:25 +0800 | [diff] [blame] | 1270 | |
Sven Eckelmann | 7e071c7 | 2012-06-03 22:19:13 +0200 | [diff] [blame] | 1271 | ret = batadv_check_management_packet(skb, if_incoming, BATADV_OGM_HLEN); |
Marek Lindner | c3e2931 | 2012-03-04 16:56:25 +0800 | [diff] [blame] | 1272 | if (!ret) |
| 1273 | return NET_RX_DROP; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1274 | |
Marek Lindner | edbf12b | 2012-03-11 06:17:49 +0800 | [diff] [blame] | 1275 | /* did we receive a B.A.T.M.A.N. IV OGM packet on an interface |
| 1276 | * that does not have B.A.T.M.A.N. IV enabled ? |
| 1277 | */ |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 1278 | if (bat_priv->bat_algo_ops->bat_ogm_emit != batadv_iv_ogm_emit) |
Marek Lindner | edbf12b | 2012-03-11 06:17:49 +0800 | [diff] [blame] | 1279 | return NET_RX_DROP; |
| 1280 | |
Sven Eckelmann | d69909d | 2012-06-03 22:19:20 +0200 | [diff] [blame] | 1281 | batadv_inc_counter(bat_priv, BATADV_CNT_MGMT_RX); |
| 1282 | batadv_add_counter(bat_priv, BATADV_CNT_MGMT_RX_BYTES, |
Martin Hundebøll | f821486 | 2012-04-20 17:02:45 +0200 | [diff] [blame] | 1283 | skb->len + ETH_HLEN); |
| 1284 | |
Marek Lindner | 8780dad | 2011-12-05 04:01:51 +0800 | [diff] [blame] | 1285 | packet_len = skb_headlen(skb); |
| 1286 | ethhdr = (struct ethhdr *)skb_mac_header(skb); |
| 1287 | packet_buff = skb->data; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1288 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_buff; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1289 | |
| 1290 | /* unpack the aggregated packets and process them one by one */ |
| 1291 | do { |
Sven Eckelmann | 7e071c7 | 2012-06-03 22:19:13 +0200 | [diff] [blame] | 1292 | tt_buff = packet_buff + buff_pos + BATADV_OGM_HLEN; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1293 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1294 | batadv_iv_ogm_process(ethhdr, batadv_ogm_packet, tt_buff, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 1295 | if_incoming); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1296 | |
Sven Eckelmann | 7e071c7 | 2012-06-03 22:19:13 +0200 | [diff] [blame] | 1297 | buff_pos += BATADV_OGM_HLEN; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1298 | buff_pos += batadv_tt_len(batadv_ogm_packet->tt_num_changes); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1299 | |
Sven Eckelmann | c67893d | 2012-07-08 18:33:51 +0200 | [diff] [blame] | 1300 | packet_pos = packet_buff + buff_pos; |
| 1301 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 1302 | } while (batadv_iv_ogm_aggr_packet(buff_pos, packet_len, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1303 | batadv_ogm_packet->tt_num_changes)); |
Marek Lindner | c3e2931 | 2012-03-04 16:56:25 +0800 | [diff] [blame] | 1304 | |
| 1305 | kfree_skb(skb); |
| 1306 | return NET_RX_SUCCESS; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1307 | } |
Marek Lindner | 1c28047 | 2011-11-28 17:40:17 +0800 | [diff] [blame] | 1308 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1309 | static struct batadv_algo_ops batadv_batman_iv __read_mostly = { |
Marek Lindner | 519d349 | 2012-04-18 17:15:57 +0800 | [diff] [blame] | 1310 | .name = "BATMAN_IV", |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 1311 | .bat_iface_enable = batadv_iv_ogm_iface_enable, |
| 1312 | .bat_iface_disable = batadv_iv_ogm_iface_disable, |
| 1313 | .bat_iface_update_mac = batadv_iv_ogm_iface_update_mac, |
| 1314 | .bat_primary_iface_set = batadv_iv_ogm_primary_iface_set, |
| 1315 | .bat_ogm_schedule = batadv_iv_ogm_schedule, |
| 1316 | .bat_ogm_emit = batadv_iv_ogm_emit, |
Marek Lindner | 1c28047 | 2011-11-28 17:40:17 +0800 | [diff] [blame] | 1317 | }; |
| 1318 | |
Sven Eckelmann | 81c524f | 2012-05-12 02:09:22 +0200 | [diff] [blame] | 1319 | int __init batadv_iv_init(void) |
Marek Lindner | 1c28047 | 2011-11-28 17:40:17 +0800 | [diff] [blame] | 1320 | { |
Marek Lindner | c3e2931 | 2012-03-04 16:56:25 +0800 | [diff] [blame] | 1321 | int ret; |
| 1322 | |
| 1323 | /* batman originator packet */ |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 1324 | ret = batadv_recv_handler_register(BATADV_IV_OGM, |
| 1325 | batadv_iv_ogm_receive); |
Marek Lindner | c3e2931 | 2012-03-04 16:56:25 +0800 | [diff] [blame] | 1326 | if (ret < 0) |
| 1327 | goto out; |
| 1328 | |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 1329 | ret = batadv_algo_register(&batadv_batman_iv); |
Marek Lindner | c3e2931 | 2012-03-04 16:56:25 +0800 | [diff] [blame] | 1330 | if (ret < 0) |
| 1331 | goto handler_unregister; |
| 1332 | |
| 1333 | goto out; |
| 1334 | |
| 1335 | handler_unregister: |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 1336 | batadv_recv_handler_unregister(BATADV_IV_OGM); |
Marek Lindner | c3e2931 | 2012-03-04 16:56:25 +0800 | [diff] [blame] | 1337 | out: |
| 1338 | return ret; |
Marek Lindner | 1c28047 | 2011-11-28 17:40:17 +0800 | [diff] [blame] | 1339 | } |