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" |
Martin Hundebøll | d56b170 | 2013-01-25 11:12:39 +0100 | [diff] [blame] | 30 | #include "network-coding.h" |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 31 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 32 | static struct batadv_neigh_node * |
| 33 | batadv_iv_ogm_neigh_new(struct batadv_hard_iface *hard_iface, |
| 34 | const uint8_t *neigh_addr, |
| 35 | struct batadv_orig_node *orig_node, |
| 36 | struct batadv_orig_node *orig_neigh, __be32 seqno) |
Marek Lindner | 7ae8b28 | 2012-03-01 15:35:21 +0800 | [diff] [blame] | 37 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 38 | struct batadv_neigh_node *neigh_node; |
Marek Lindner | 7ae8b28 | 2012-03-01 15:35:21 +0800 | [diff] [blame] | 39 | |
Al Viro | e0f5211 | 2012-04-22 07:46:29 +0100 | [diff] [blame] | 40 | neigh_node = batadv_neigh_node_new(hard_iface, neigh_addr, |
| 41 | ntohl(seqno)); |
Marek Lindner | 7ae8b28 | 2012-03-01 15:35:21 +0800 | [diff] [blame] | 42 | if (!neigh_node) |
| 43 | goto out; |
| 44 | |
| 45 | INIT_LIST_HEAD(&neigh_node->bonding_list); |
Marek Lindner | 7ae8b28 | 2012-03-01 15:35:21 +0800 | [diff] [blame] | 46 | |
| 47 | neigh_node->orig_node = orig_neigh; |
| 48 | neigh_node->if_incoming = hard_iface; |
| 49 | |
| 50 | spin_lock_bh(&orig_node->neigh_list_lock); |
| 51 | hlist_add_head_rcu(&neigh_node->list, &orig_node->neigh_list); |
| 52 | spin_unlock_bh(&orig_node->neigh_list_lock); |
| 53 | |
| 54 | out: |
| 55 | return neigh_node; |
| 56 | } |
| 57 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 58 | 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] | 59 | { |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 60 | struct batadv_ogm_packet *batadv_ogm_packet; |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 61 | unsigned char *ogm_buff; |
Marek Lindner | d7d32ec | 2012-02-07 17:20:46 +0800 | [diff] [blame] | 62 | uint32_t random_seqno; |
Sven Eckelmann | 5346c35 | 2012-05-05 13:27:28 +0200 | [diff] [blame] | 63 | int res = -ENOMEM; |
Marek Lindner | d7d32ec | 2012-02-07 17:20:46 +0800 | [diff] [blame] | 64 | |
| 65 | /* randomize initial seqno to avoid collision */ |
| 66 | get_random_bytes(&random_seqno, sizeof(random_seqno)); |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 67 | atomic_set(&hard_iface->bat_iv.ogm_seqno, random_seqno); |
Marek Lindner | d0b9fd8 | 2011-07-30 12:33:33 +0200 | [diff] [blame] | 68 | |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 69 | hard_iface->bat_iv.ogm_buff_len = BATADV_OGM_HLEN; |
| 70 | ogm_buff = kmalloc(hard_iface->bat_iv.ogm_buff_len, GFP_ATOMIC); |
| 71 | if (!ogm_buff) |
Marek Lindner | 77af757 | 2012-02-07 17:20:48 +0800 | [diff] [blame] | 72 | goto out; |
| 73 | |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 74 | hard_iface->bat_iv.ogm_buff = ogm_buff; |
| 75 | |
| 76 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 77 | batadv_ogm_packet->header.packet_type = BATADV_IV_OGM; |
| 78 | batadv_ogm_packet->header.version = BATADV_COMPAT_VERSION; |
| 79 | batadv_ogm_packet->header.ttl = 2; |
| 80 | batadv_ogm_packet->flags = BATADV_NO_FLAGS; |
| 81 | batadv_ogm_packet->tq = BATADV_TQ_MAX_VALUE; |
| 82 | batadv_ogm_packet->tt_num_changes = 0; |
| 83 | batadv_ogm_packet->ttvn = 0; |
Marek Lindner | 77af757 | 2012-02-07 17:20:48 +0800 | [diff] [blame] | 84 | |
| 85 | res = 0; |
| 86 | |
| 87 | out: |
| 88 | return res; |
Marek Lindner | d0b9fd8 | 2011-07-30 12:33:33 +0200 | [diff] [blame] | 89 | } |
| 90 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 91 | 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] | 92 | { |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 93 | kfree(hard_iface->bat_iv.ogm_buff); |
| 94 | hard_iface->bat_iv.ogm_buff = NULL; |
Marek Lindner | 00a5007 | 2012-02-07 17:20:47 +0800 | [diff] [blame] | 95 | } |
| 96 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 97 | 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] | 98 | { |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 99 | struct batadv_ogm_packet *batadv_ogm_packet; |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 100 | unsigned char *ogm_buff = hard_iface->bat_iv.ogm_buff; |
Marek Lindner | d0b9fd8 | 2011-07-30 12:33:33 +0200 | [diff] [blame] | 101 | |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 102 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 103 | memcpy(batadv_ogm_packet->orig, |
Marek Lindner | d0b9fd8 | 2011-07-30 12:33:33 +0200 | [diff] [blame] | 104 | hard_iface->net_dev->dev_addr, ETH_ALEN); |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 105 | memcpy(batadv_ogm_packet->prev_sender, |
Marek Lindner | d0b9fd8 | 2011-07-30 12:33:33 +0200 | [diff] [blame] | 106 | hard_iface->net_dev->dev_addr, ETH_ALEN); |
| 107 | } |
| 108 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 109 | static void |
| 110 | batadv_iv_ogm_primary_iface_set(struct batadv_hard_iface *hard_iface) |
Marek Lindner | c322939 | 2012-03-11 06:17:50 +0800 | [diff] [blame] | 111 | { |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 112 | struct batadv_ogm_packet *batadv_ogm_packet; |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 113 | unsigned char *ogm_buff = hard_iface->bat_iv.ogm_buff; |
Marek Lindner | c322939 | 2012-03-11 06:17:50 +0800 | [diff] [blame] | 114 | |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 115 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 116 | batadv_ogm_packet->flags = BATADV_PRIMARIES_FIRST_HOP; |
| 117 | batadv_ogm_packet->header.ttl = BATADV_TTL; |
Marek Lindner | c322939 | 2012-03-11 06:17:50 +0800 | [diff] [blame] | 118 | } |
| 119 | |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 120 | /* when do we schedule our own ogm to be sent */ |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 121 | static unsigned long |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 122 | batadv_iv_ogm_emit_send_time(const struct batadv_priv *bat_priv) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 123 | { |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 124 | unsigned int msecs; |
| 125 | |
| 126 | msecs = atomic_read(&bat_priv->orig_interval) - BATADV_JITTER; |
Akinobu Mita | e76e432 | 2012-12-24 11:14:07 +0900 | [diff] [blame] | 127 | msecs += prandom_u32() % (2 * BATADV_JITTER); |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 128 | |
| 129 | return jiffies + msecs_to_jiffies(msecs); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 130 | } |
| 131 | |
| 132 | /* when do we schedule a ogm packet to be sent */ |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 133 | static unsigned long batadv_iv_ogm_fwd_send_time(void) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 134 | { |
Akinobu Mita | e76e432 | 2012-12-24 11:14:07 +0900 | [diff] [blame] | 135 | return jiffies + msecs_to_jiffies(prandom_u32() % (BATADV_JITTER / 2)); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 136 | } |
| 137 | |
| 138 | /* apply hop penalty for a normal link */ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 139 | static uint8_t batadv_hop_penalty(uint8_t tq, |
| 140 | const struct batadv_priv *bat_priv) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 141 | { |
| 142 | int hop_penalty = atomic_read(&bat_priv->hop_penalty); |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 143 | int new_tq; |
| 144 | |
| 145 | new_tq = tq * (BATADV_TQ_MAX_VALUE - hop_penalty); |
| 146 | new_tq /= BATADV_TQ_MAX_VALUE; |
| 147 | |
| 148 | return new_tq; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 149 | } |
| 150 | |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 151 | /* is there another aggregated packet here? */ |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 152 | static int batadv_iv_ogm_aggr_packet(int buff_pos, int packet_len, |
| 153 | int tt_num_changes) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 154 | { |
Sven Eckelmann | 08c36d3 | 2012-05-12 02:09:39 +0200 | [diff] [blame] | 155 | int next_buff_pos = 0; |
| 156 | |
Sven Eckelmann | 7e071c7 | 2012-06-03 22:19:13 +0200 | [diff] [blame] | 157 | next_buff_pos += buff_pos + BATADV_OGM_HLEN; |
Sven Eckelmann | 08c36d3 | 2012-05-12 02:09:39 +0200 | [diff] [blame] | 158 | next_buff_pos += batadv_tt_len(tt_num_changes); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 159 | |
| 160 | return (next_buff_pos <= packet_len) && |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 161 | (next_buff_pos <= BATADV_MAX_AGGREGATION_BYTES); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 162 | } |
| 163 | |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 164 | /* send a batman ogm to a given interface */ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 165 | static void batadv_iv_ogm_send_to_if(struct batadv_forw_packet *forw_packet, |
| 166 | struct batadv_hard_iface *hard_iface) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 167 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 168 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 169 | char *fwd_str; |
| 170 | uint8_t packet_num; |
| 171 | int16_t buff_pos; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 172 | struct batadv_ogm_packet *batadv_ogm_packet; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 173 | struct sk_buff *skb; |
Sven Eckelmann | c67893d | 2012-07-08 18:33:51 +0200 | [diff] [blame] | 174 | uint8_t *packet_pos; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 175 | |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 176 | if (hard_iface->if_status != BATADV_IF_ACTIVE) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 177 | return; |
| 178 | |
| 179 | packet_num = 0; |
| 180 | buff_pos = 0; |
Sven Eckelmann | c67893d | 2012-07-08 18:33:51 +0200 | [diff] [blame] | 181 | packet_pos = forw_packet->skb->data; |
| 182 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 183 | |
| 184 | /* adjust all flags and log packets */ |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 185 | while (batadv_iv_ogm_aggr_packet(buff_pos, forw_packet->packet_len, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 186 | batadv_ogm_packet->tt_num_changes)) { |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 187 | /* we might have aggregated direct link packets with an |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 188 | * ordinary base packet |
| 189 | */ |
Sven Eckelmann | 8de47de | 2012-07-08 16:32:09 +0200 | [diff] [blame] | 190 | if (forw_packet->direct_link_flags & BIT(packet_num) && |
| 191 | forw_packet->if_incoming == hard_iface) |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 192 | batadv_ogm_packet->flags |= BATADV_DIRECTLINK; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 193 | else |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 194 | batadv_ogm_packet->flags &= ~BATADV_DIRECTLINK; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 195 | |
Sven Eckelmann | c67893d | 2012-07-08 18:33:51 +0200 | [diff] [blame] | 196 | if (packet_num > 0 || !forw_packet->own) |
| 197 | fwd_str = "Forwarding"; |
| 198 | else |
| 199 | fwd_str = "Sending own"; |
| 200 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 201 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 202 | "%s %spacket (originator %pM, seqno %u, TQ %d, TTL %d, IDF %s, ttvn %d) on interface %s [%pM]\n", |
| 203 | fwd_str, (packet_num > 0 ? "aggregated " : ""), |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 204 | batadv_ogm_packet->orig, |
| 205 | ntohl(batadv_ogm_packet->seqno), |
| 206 | batadv_ogm_packet->tq, batadv_ogm_packet->header.ttl, |
| 207 | (batadv_ogm_packet->flags & BATADV_DIRECTLINK ? |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 208 | "on" : "off"), |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 209 | batadv_ogm_packet->ttvn, hard_iface->net_dev->name, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 210 | hard_iface->net_dev->dev_addr); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 211 | |
Sven Eckelmann | 7e071c7 | 2012-06-03 22:19:13 +0200 | [diff] [blame] | 212 | buff_pos += BATADV_OGM_HLEN; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 213 | buff_pos += batadv_tt_len(batadv_ogm_packet->tt_num_changes); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 214 | packet_num++; |
Sven Eckelmann | c67893d | 2012-07-08 18:33:51 +0200 | [diff] [blame] | 215 | packet_pos = forw_packet->skb->data + buff_pos; |
| 216 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 217 | } |
| 218 | |
| 219 | /* create clone because function is called more than once */ |
| 220 | skb = skb_clone(forw_packet->skb, GFP_ATOMIC); |
Martin Hundebøll | f821486 | 2012-04-20 17:02:45 +0200 | [diff] [blame] | 221 | if (skb) { |
Sven Eckelmann | d69909d | 2012-06-03 22:19:20 +0200 | [diff] [blame] | 222 | batadv_inc_counter(bat_priv, BATADV_CNT_MGMT_TX); |
| 223 | batadv_add_counter(bat_priv, BATADV_CNT_MGMT_TX_BYTES, |
Martin Hundebøll | f821486 | 2012-04-20 17:02:45 +0200 | [diff] [blame] | 224 | skb->len + ETH_HLEN); |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 225 | batadv_send_skb_packet(skb, hard_iface, batadv_broadcast_addr); |
Martin Hundebøll | f821486 | 2012-04-20 17:02:45 +0200 | [diff] [blame] | 226 | } |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 227 | } |
| 228 | |
| 229 | /* send a batman ogm packet */ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 230 | static void batadv_iv_ogm_emit(struct batadv_forw_packet *forw_packet) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 231 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 232 | struct batadv_hard_iface *hard_iface; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 233 | struct net_device *soft_iface; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 234 | struct batadv_priv *bat_priv; |
| 235 | struct batadv_hard_iface *primary_if = NULL; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 236 | struct batadv_ogm_packet *batadv_ogm_packet; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 237 | unsigned char directlink; |
Sven Eckelmann | c67893d | 2012-07-08 18:33:51 +0200 | [diff] [blame] | 238 | uint8_t *packet_pos; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 239 | |
Sven Eckelmann | c67893d | 2012-07-08 18:33:51 +0200 | [diff] [blame] | 240 | packet_pos = forw_packet->skb->data; |
| 241 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 242 | directlink = (batadv_ogm_packet->flags & BATADV_DIRECTLINK ? 1 : 0); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 243 | |
| 244 | if (!forw_packet->if_incoming) { |
Sven Eckelmann | 86ceb36 | 2012-03-07 09:07:45 +0100 | [diff] [blame] | 245 | pr_err("Error - can't forward packet: incoming iface not specified\n"); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 246 | goto out; |
| 247 | } |
| 248 | |
| 249 | soft_iface = forw_packet->if_incoming->soft_iface; |
| 250 | bat_priv = netdev_priv(soft_iface); |
| 251 | |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 252 | if (forw_packet->if_incoming->if_status != BATADV_IF_ACTIVE) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 253 | goto out; |
| 254 | |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 255 | primary_if = batadv_primary_if_get_selected(bat_priv); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 256 | if (!primary_if) |
| 257 | goto out; |
| 258 | |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 259 | /* multihomed peer assumed |
| 260 | * non-primary OGMs are only broadcasted on their interface |
| 261 | */ |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 262 | if ((directlink && (batadv_ogm_packet->header.ttl == 1)) || |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 263 | (forw_packet->own && (forw_packet->if_incoming != primary_if))) { |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 264 | /* FIXME: what about aggregated packets ? */ |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 265 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 266 | "%s packet (originator %pM, seqno %u, TTL %d) on interface %s [%pM]\n", |
| 267 | (forw_packet->own ? "Sending own" : "Forwarding"), |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 268 | batadv_ogm_packet->orig, |
| 269 | ntohl(batadv_ogm_packet->seqno), |
| 270 | batadv_ogm_packet->header.ttl, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 271 | forw_packet->if_incoming->net_dev->name, |
| 272 | forw_packet->if_incoming->net_dev->dev_addr); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 273 | |
| 274 | /* skb is only used once and than forw_packet is free'd */ |
Sven Eckelmann | 9455e34 | 2012-05-12 02:09:37 +0200 | [diff] [blame] | 275 | batadv_send_skb_packet(forw_packet->skb, |
| 276 | forw_packet->if_incoming, |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 277 | batadv_broadcast_addr); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 278 | forw_packet->skb = NULL; |
| 279 | |
| 280 | goto out; |
| 281 | } |
| 282 | |
| 283 | /* broadcast on every interface */ |
| 284 | rcu_read_lock(); |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 285 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 286 | if (hard_iface->soft_iface != soft_iface) |
| 287 | continue; |
| 288 | |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 289 | batadv_iv_ogm_send_to_if(forw_packet, hard_iface); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 290 | } |
| 291 | rcu_read_unlock(); |
| 292 | |
| 293 | out: |
| 294 | if (primary_if) |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 295 | batadv_hardif_free_ref(primary_if); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 296 | } |
| 297 | |
| 298 | /* return true if new_packet can be aggregated with forw_packet */ |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 299 | static bool |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 300 | 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] | 301 | struct batadv_priv *bat_priv, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 302 | int packet_len, unsigned long send_time, |
| 303 | bool directlink, |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 304 | const struct batadv_hard_iface *if_incoming, |
| 305 | const struct batadv_forw_packet *forw_packet) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 306 | { |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 307 | struct batadv_ogm_packet *batadv_ogm_packet; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 308 | int aggregated_bytes = forw_packet->packet_len + packet_len; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 309 | struct batadv_hard_iface *primary_if = NULL; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 310 | bool res = false; |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 311 | unsigned long aggregation_end_time; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 312 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 313 | batadv_ogm_packet = (struct batadv_ogm_packet *)forw_packet->skb->data; |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 314 | aggregation_end_time = send_time; |
| 315 | aggregation_end_time += msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 316 | |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 317 | /* we can aggregate the current packet to this aggregated packet |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 318 | * if: |
| 319 | * |
| 320 | * - the send time is within our MAX_AGGREGATION_MS time |
| 321 | * - the resulting packet wont be bigger than |
| 322 | * MAX_AGGREGATION_BYTES |
| 323 | */ |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 324 | if (time_before(send_time, forw_packet->send_time) && |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 325 | time_after_eq(aggregation_end_time, forw_packet->send_time) && |
| 326 | (aggregated_bytes <= BATADV_MAX_AGGREGATION_BYTES)) { |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 327 | /* check aggregation compatibility |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 328 | * -> direct link packets are broadcasted on |
| 329 | * their interface only |
| 330 | * -> aggregate packet if the current packet is |
| 331 | * a "global" packet as well as the base |
| 332 | * packet |
| 333 | */ |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 334 | primary_if = batadv_primary_if_get_selected(bat_priv); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 335 | if (!primary_if) |
| 336 | goto out; |
| 337 | |
| 338 | /* packets without direct link flag and high TTL |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 339 | * are flooded through the net |
| 340 | */ |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 341 | if ((!directlink) && |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 342 | (!(batadv_ogm_packet->flags & BATADV_DIRECTLINK)) && |
| 343 | (batadv_ogm_packet->header.ttl != 1) && |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 344 | |
| 345 | /* own packets originating non-primary |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 346 | * interfaces leave only that interface |
| 347 | */ |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 348 | ((!forw_packet->own) || |
| 349 | (forw_packet->if_incoming == primary_if))) { |
| 350 | res = true; |
| 351 | goto out; |
| 352 | } |
| 353 | |
| 354 | /* if the incoming packet is sent via this one |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 355 | * interface only - we still can aggregate |
| 356 | */ |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 357 | if ((directlink) && |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 358 | (new_bat_ogm_packet->header.ttl == 1) && |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 359 | (forw_packet->if_incoming == if_incoming) && |
| 360 | |
| 361 | /* packets from direct neighbors or |
| 362 | * own secondary interface packets |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 363 | * (= secondary interface packets in general) |
| 364 | */ |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 365 | (batadv_ogm_packet->flags & BATADV_DIRECTLINK || |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 366 | (forw_packet->own && |
| 367 | forw_packet->if_incoming != primary_if))) { |
| 368 | res = true; |
| 369 | goto out; |
| 370 | } |
| 371 | } |
| 372 | |
| 373 | out: |
| 374 | if (primary_if) |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 375 | batadv_hardif_free_ref(primary_if); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 376 | return res; |
| 377 | } |
| 378 | |
| 379 | /* create a new aggregated packet and add this packet to it */ |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 380 | static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff, |
| 381 | int packet_len, unsigned long send_time, |
| 382 | bool direct_link, |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 383 | struct batadv_hard_iface *if_incoming, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 384 | int own_packet) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 385 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 386 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
| 387 | struct batadv_forw_packet *forw_packet_aggr; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 388 | unsigned char *skb_buff; |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 389 | unsigned int skb_size; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 390 | |
| 391 | if (!atomic_inc_not_zero(&if_incoming->refcount)) |
| 392 | return; |
| 393 | |
| 394 | /* own packet should always be scheduled */ |
| 395 | if (!own_packet) { |
Sven Eckelmann | 3e34819 | 2012-05-16 20:23:22 +0200 | [diff] [blame] | 396 | if (!batadv_atomic_dec_not_zero(&bat_priv->batman_queue_left)) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 397 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 398 | "batman packet queue full\n"); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 399 | goto out; |
| 400 | } |
| 401 | } |
| 402 | |
| 403 | forw_packet_aggr = kmalloc(sizeof(*forw_packet_aggr), GFP_ATOMIC); |
| 404 | if (!forw_packet_aggr) { |
| 405 | if (!own_packet) |
| 406 | atomic_inc(&bat_priv->batman_queue_left); |
| 407 | goto out; |
| 408 | } |
| 409 | |
| 410 | if ((atomic_read(&bat_priv->aggregated_ogms)) && |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 411 | (packet_len < BATADV_MAX_AGGREGATION_BYTES)) |
Sven Eckelmann | 5b24657 | 2012-11-04 17:11:45 +0100 | [diff] [blame] | 412 | skb_size = BATADV_MAX_AGGREGATION_BYTES; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 413 | else |
Sven Eckelmann | 5b24657 | 2012-11-04 17:11:45 +0100 | [diff] [blame] | 414 | skb_size = packet_len; |
| 415 | |
| 416 | skb_size += ETH_HLEN + NET_IP_ALIGN; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 417 | |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 418 | forw_packet_aggr->skb = dev_alloc_skb(skb_size); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 419 | if (!forw_packet_aggr->skb) { |
| 420 | if (!own_packet) |
| 421 | atomic_inc(&bat_priv->batman_queue_left); |
| 422 | kfree(forw_packet_aggr); |
| 423 | goto out; |
| 424 | } |
Sven Eckelmann | 5b24657 | 2012-11-04 17:11:45 +0100 | [diff] [blame] | 425 | skb_reserve(forw_packet_aggr->skb, ETH_HLEN + NET_IP_ALIGN); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 426 | |
| 427 | INIT_HLIST_NODE(&forw_packet_aggr->list); |
| 428 | |
| 429 | skb_buff = skb_put(forw_packet_aggr->skb, packet_len); |
| 430 | forw_packet_aggr->packet_len = packet_len; |
| 431 | memcpy(skb_buff, packet_buff, packet_len); |
| 432 | |
| 433 | forw_packet_aggr->own = own_packet; |
| 434 | forw_packet_aggr->if_incoming = if_incoming; |
| 435 | forw_packet_aggr->num_packets = 0; |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 436 | forw_packet_aggr->direct_link_flags = BATADV_NO_FLAGS; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 437 | forw_packet_aggr->send_time = send_time; |
| 438 | |
| 439 | /* save packet direct link flag status */ |
| 440 | if (direct_link) |
| 441 | forw_packet_aggr->direct_link_flags |= 1; |
| 442 | |
| 443 | /* add new packet to packet list */ |
| 444 | spin_lock_bh(&bat_priv->forw_bat_list_lock); |
| 445 | hlist_add_head(&forw_packet_aggr->list, &bat_priv->forw_bat_list); |
| 446 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); |
| 447 | |
| 448 | /* start timer for this packet */ |
| 449 | INIT_DELAYED_WORK(&forw_packet_aggr->delayed_work, |
Sven Eckelmann | 9455e34 | 2012-05-12 02:09:37 +0200 | [diff] [blame] | 450 | batadv_send_outstanding_bat_ogm_packet); |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 451 | queue_delayed_work(batadv_event_workqueue, |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 452 | &forw_packet_aggr->delayed_work, |
| 453 | send_time - jiffies); |
| 454 | |
| 455 | return; |
| 456 | out: |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 457 | batadv_hardif_free_ref(if_incoming); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 458 | } |
| 459 | |
| 460 | /* aggregate a new packet into the existing ogm packet */ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 461 | 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] | 462 | const unsigned char *packet_buff, |
| 463 | int packet_len, bool direct_link) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 464 | { |
| 465 | unsigned char *skb_buff; |
Sven Eckelmann | 8de47de | 2012-07-08 16:32:09 +0200 | [diff] [blame] | 466 | unsigned long new_direct_link_flag; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 467 | |
| 468 | skb_buff = skb_put(forw_packet_aggr->skb, packet_len); |
| 469 | memcpy(skb_buff, packet_buff, packet_len); |
| 470 | forw_packet_aggr->packet_len += packet_len; |
| 471 | forw_packet_aggr->num_packets++; |
| 472 | |
| 473 | /* save packet direct link flag status */ |
Sven Eckelmann | 8de47de | 2012-07-08 16:32:09 +0200 | [diff] [blame] | 474 | if (direct_link) { |
| 475 | new_direct_link_flag = BIT(forw_packet_aggr->num_packets); |
| 476 | forw_packet_aggr->direct_link_flags |= new_direct_link_flag; |
| 477 | } |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 478 | } |
| 479 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 480 | static void batadv_iv_ogm_queue_add(struct batadv_priv *bat_priv, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 481 | unsigned char *packet_buff, |
| 482 | int packet_len, |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 483 | struct batadv_hard_iface *if_incoming, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 484 | int own_packet, unsigned long send_time) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 485 | { |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 486 | /* _aggr -> pointer to the packet we want to aggregate with |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 487 | * _pos -> pointer to the position in the queue |
| 488 | */ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 489 | struct batadv_forw_packet *forw_packet_aggr = NULL; |
| 490 | struct batadv_forw_packet *forw_packet_pos = NULL; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 491 | struct batadv_ogm_packet *batadv_ogm_packet; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 492 | bool direct_link; |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 493 | unsigned long max_aggregation_jiffies; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 494 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 495 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_buff; |
| 496 | direct_link = batadv_ogm_packet->flags & BATADV_DIRECTLINK ? 1 : 0; |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 497 | max_aggregation_jiffies = msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 498 | |
| 499 | /* find position for the packet in the forward queue */ |
| 500 | spin_lock_bh(&bat_priv->forw_bat_list_lock); |
| 501 | /* own packets are not to be aggregated */ |
| 502 | if ((atomic_read(&bat_priv->aggregated_ogms)) && (!own_packet)) { |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 503 | hlist_for_each_entry(forw_packet_pos, |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 504 | &bat_priv->forw_bat_list, list) { |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 505 | if (batadv_iv_ogm_can_aggregate(batadv_ogm_packet, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 506 | bat_priv, packet_len, |
| 507 | send_time, direct_link, |
| 508 | if_incoming, |
| 509 | forw_packet_pos)) { |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 510 | forw_packet_aggr = forw_packet_pos; |
| 511 | break; |
| 512 | } |
| 513 | } |
| 514 | } |
| 515 | |
| 516 | /* nothing to aggregate with - either aggregation disabled or no |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 517 | * suitable aggregation packet found |
| 518 | */ |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 519 | if (!forw_packet_aggr) { |
| 520 | /* the following section can run without the lock */ |
| 521 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); |
| 522 | |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 523 | /* if we could not aggregate this packet with one of the others |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 524 | * we hold it back for a while, so that it might be aggregated |
| 525 | * later on |
| 526 | */ |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 527 | if (!own_packet && atomic_read(&bat_priv->aggregated_ogms)) |
| 528 | send_time += max_aggregation_jiffies; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 529 | |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 530 | batadv_iv_ogm_aggregate_new(packet_buff, packet_len, |
| 531 | send_time, direct_link, |
| 532 | if_incoming, own_packet); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 533 | } else { |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 534 | batadv_iv_ogm_aggregate(forw_packet_aggr, packet_buff, |
| 535 | packet_len, direct_link); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 536 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); |
| 537 | } |
| 538 | } |
| 539 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 540 | static void batadv_iv_ogm_forward(struct batadv_orig_node *orig_node, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 541 | const struct ethhdr *ethhdr, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 542 | struct batadv_ogm_packet *batadv_ogm_packet, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 543 | bool is_single_hop_neigh, |
| 544 | bool is_from_best_next_hop, |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 545 | struct batadv_hard_iface *if_incoming) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 546 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 547 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 548 | uint8_t tt_num_changes; |
| 549 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 550 | if (batadv_ogm_packet->header.ttl <= 1) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 551 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, "ttl exceeded\n"); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 552 | return; |
| 553 | } |
| 554 | |
Marek Lindner | 13b2541 | 2012-03-11 06:17:53 +0800 | [diff] [blame] | 555 | if (!is_from_best_next_hop) { |
| 556 | /* Mark the forwarded packet when it is not coming from our |
| 557 | * best next hop. We still need to forward the packet for our |
| 558 | * neighbor link quality detection to work in case the packet |
| 559 | * originated from a single hop neighbor. Otherwise we can |
| 560 | * simply drop the ogm. |
| 561 | */ |
| 562 | if (is_single_hop_neigh) |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 563 | batadv_ogm_packet->flags |= BATADV_NOT_BEST_NEXT_HOP; |
Marek Lindner | 13b2541 | 2012-03-11 06:17:53 +0800 | [diff] [blame] | 564 | else |
| 565 | return; |
| 566 | } |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 567 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 568 | tt_num_changes = batadv_ogm_packet->tt_num_changes; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 569 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 570 | batadv_ogm_packet->header.ttl--; |
| 571 | memcpy(batadv_ogm_packet->prev_sender, ethhdr->h_source, ETH_ALEN); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 572 | |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 573 | /* apply hop penalty */ |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 574 | batadv_ogm_packet->tq = batadv_hop_penalty(batadv_ogm_packet->tq, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 575 | bat_priv); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 576 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 577 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 578 | "Forwarding packet: tq: %i, ttl: %i\n", |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 579 | batadv_ogm_packet->tq, batadv_ogm_packet->header.ttl); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 580 | |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 581 | /* switch of primaries first hop flag when forwarding */ |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 582 | batadv_ogm_packet->flags &= ~BATADV_PRIMARIES_FIRST_HOP; |
Marek Lindner | 75cd33f | 2012-03-01 15:35:16 +0800 | [diff] [blame] | 583 | if (is_single_hop_neigh) |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 584 | batadv_ogm_packet->flags |= BATADV_DIRECTLINK; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 585 | else |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 586 | batadv_ogm_packet->flags &= ~BATADV_DIRECTLINK; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 587 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 588 | batadv_iv_ogm_queue_add(bat_priv, (unsigned char *)batadv_ogm_packet, |
Sven Eckelmann | 7e071c7 | 2012-06-03 22:19:13 +0200 | [diff] [blame] | 589 | BATADV_OGM_HLEN + batadv_tt_len(tt_num_changes), |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 590 | if_incoming, 0, batadv_iv_ogm_fwd_send_time()); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 591 | } |
| 592 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 593 | static void batadv_iv_ogm_schedule(struct batadv_hard_iface *hard_iface) |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 594 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 595 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 596 | unsigned char **ogm_buff = &hard_iface->bat_iv.ogm_buff; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 597 | struct batadv_ogm_packet *batadv_ogm_packet; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 598 | struct batadv_hard_iface *primary_if; |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 599 | int *ogm_buff_len = &hard_iface->bat_iv.ogm_buff_len; |
Marek Lindner | be9aa4c | 2012-05-07 04:22:05 +0800 | [diff] [blame] | 600 | int vis_server, tt_num_changes = 0; |
Sven Eckelmann | bbb1f90 | 2012-07-08 17:13:15 +0200 | [diff] [blame] | 601 | uint32_t seqno; |
| 602 | uint8_t bandwidth; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 603 | |
| 604 | vis_server = atomic_read(&bat_priv->vis_mode); |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 605 | primary_if = batadv_primary_if_get_selected(bat_priv); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 606 | |
Marek Lindner | be9aa4c | 2012-05-07 04:22:05 +0800 | [diff] [blame] | 607 | if (hard_iface == primary_if) |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 608 | tt_num_changes = batadv_tt_append_diff(bat_priv, ogm_buff, |
| 609 | ogm_buff_len, |
Sven Eckelmann | 7e071c7 | 2012-06-03 22:19:13 +0200 | [diff] [blame] | 610 | BATADV_OGM_HLEN); |
Marek Lindner | be9aa4c | 2012-05-07 04:22:05 +0800 | [diff] [blame] | 611 | |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 612 | batadv_ogm_packet = (struct batadv_ogm_packet *)(*ogm_buff); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 613 | |
| 614 | /* change sequence number to network order */ |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 615 | seqno = (uint32_t)atomic_read(&hard_iface->bat_iv.ogm_seqno); |
Sven Eckelmann | bbb1f90 | 2012-07-08 17:13:15 +0200 | [diff] [blame] | 616 | batadv_ogm_packet->seqno = htonl(seqno); |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 617 | atomic_inc(&hard_iface->bat_iv.ogm_seqno); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 618 | |
Sven Eckelmann | 807736f | 2012-07-15 22:26:51 +0200 | [diff] [blame] | 619 | batadv_ogm_packet->ttvn = atomic_read(&bat_priv->tt.vn); |
| 620 | batadv_ogm_packet->tt_crc = htons(bat_priv->tt.local_crc); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 621 | if (tt_num_changes >= 0) |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 622 | batadv_ogm_packet->tt_num_changes = tt_num_changes; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 623 | |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 624 | if (vis_server == BATADV_VIS_TYPE_SERVER_SYNC) |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 625 | batadv_ogm_packet->flags |= BATADV_VIS_SERVER; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 626 | else |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 627 | batadv_ogm_packet->flags &= ~BATADV_VIS_SERVER; |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 628 | |
Sven Eckelmann | bbb1f90 | 2012-07-08 17:13:15 +0200 | [diff] [blame] | 629 | if (hard_iface == primary_if && |
| 630 | atomic_read(&bat_priv->gw_mode) == BATADV_GW_MODE_SERVER) { |
| 631 | bandwidth = (uint8_t)atomic_read(&bat_priv->gw_bandwidth); |
| 632 | batadv_ogm_packet->gw_flags = bandwidth; |
| 633 | } else { |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 634 | batadv_ogm_packet->gw_flags = BATADV_NO_FLAGS; |
Sven Eckelmann | bbb1f90 | 2012-07-08 17:13:15 +0200 | [diff] [blame] | 635 | } |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 636 | |
Sven Eckelmann | 30d3c51 | 2012-05-12 02:09:36 +0200 | [diff] [blame] | 637 | batadv_slide_own_bcast_window(hard_iface); |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 638 | batadv_iv_ogm_queue_add(bat_priv, hard_iface->bat_iv.ogm_buff, |
| 639 | hard_iface->bat_iv.ogm_buff_len, hard_iface, 1, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 640 | batadv_iv_ogm_emit_send_time(bat_priv)); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 641 | |
| 642 | if (primary_if) |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 643 | batadv_hardif_free_ref(primary_if); |
Marek Lindner | b9dacc5 | 2011-08-03 09:09:30 +0200 | [diff] [blame] | 644 | } |
| 645 | |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 646 | static void |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 647 | batadv_iv_ogm_orig_update(struct batadv_priv *bat_priv, |
| 648 | struct batadv_orig_node *orig_node, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 649 | const struct ethhdr *ethhdr, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 650 | const struct batadv_ogm_packet *batadv_ogm_packet, |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 651 | struct batadv_hard_iface *if_incoming, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 652 | const unsigned char *tt_buff, |
| 653 | int is_duplicate) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 654 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 655 | struct batadv_neigh_node *neigh_node = NULL, *tmp_neigh_node = NULL; |
| 656 | struct batadv_neigh_node *router = NULL; |
| 657 | struct batadv_orig_node *orig_node_tmp; |
Linus LĂĽssing | 7caf69f | 2012-09-18 03:01:08 +0200 | [diff] [blame] | 658 | int if_num; |
Sven Eckelmann | bbb1f90 | 2012-07-08 17:13:15 +0200 | [diff] [blame] | 659 | uint8_t sum_orig, sum_neigh; |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 660 | uint8_t *neigh_addr; |
Sven Eckelmann | bbb1f90 | 2012-07-08 17:13:15 +0200 | [diff] [blame] | 661 | uint8_t tq_avg; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 662 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 663 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 664 | "update_originator(): Searching and updating originator entry of received packet\n"); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 665 | |
| 666 | rcu_read_lock(); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 667 | hlist_for_each_entry_rcu(tmp_neigh_node, |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 668 | &orig_node->neigh_list, list) { |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 669 | neigh_addr = tmp_neigh_node->addr; |
| 670 | if (batadv_compare_eth(neigh_addr, ethhdr->h_source) && |
| 671 | tmp_neigh_node->if_incoming == if_incoming && |
| 672 | atomic_inc_not_zero(&tmp_neigh_node->refcount)) { |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 673 | if (neigh_node) |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 674 | batadv_neigh_node_free_ref(neigh_node); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 675 | neigh_node = tmp_neigh_node; |
| 676 | continue; |
| 677 | } |
| 678 | |
| 679 | if (is_duplicate) |
| 680 | continue; |
| 681 | |
Marek Lindner | e3b0d0d | 2012-03-17 15:28:32 +0800 | [diff] [blame] | 682 | spin_lock_bh(&tmp_neigh_node->lq_update_lock); |
Sven Eckelmann | 925a667 | 2012-05-12 02:09:35 +0200 | [diff] [blame] | 683 | batadv_ring_buffer_set(tmp_neigh_node->tq_recv, |
| 684 | &tmp_neigh_node->tq_index, 0); |
Sven Eckelmann | bbb1f90 | 2012-07-08 17:13:15 +0200 | [diff] [blame] | 685 | tq_avg = batadv_ring_buffer_avg(tmp_neigh_node->tq_recv); |
| 686 | tmp_neigh_node->tq_avg = tq_avg; |
Marek Lindner | e3b0d0d | 2012-03-17 15:28:32 +0800 | [diff] [blame] | 687 | spin_unlock_bh(&tmp_neigh_node->lq_update_lock); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 688 | } |
| 689 | |
| 690 | if (!neigh_node) { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 691 | struct batadv_orig_node *orig_tmp; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 692 | |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 693 | orig_tmp = batadv_get_orig_node(bat_priv, ethhdr->h_source); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 694 | if (!orig_tmp) |
| 695 | goto unlock; |
| 696 | |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 697 | neigh_node = batadv_iv_ogm_neigh_new(if_incoming, |
| 698 | ethhdr->h_source, |
| 699 | orig_node, orig_tmp, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 700 | batadv_ogm_packet->seqno); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 701 | |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 702 | batadv_orig_node_free_ref(orig_tmp); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 703 | if (!neigh_node) |
| 704 | goto unlock; |
| 705 | } else |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 706 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 707 | "Updating existing last-hop neighbor of originator\n"); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 708 | |
| 709 | rcu_read_unlock(); |
| 710 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 711 | orig_node->flags = batadv_ogm_packet->flags; |
Marek Lindner | d7b2a97 | 2012-03-01 15:35:19 +0800 | [diff] [blame] | 712 | neigh_node->last_seen = jiffies; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 713 | |
Marek Lindner | e3b0d0d | 2012-03-17 15:28:32 +0800 | [diff] [blame] | 714 | spin_lock_bh(&neigh_node->lq_update_lock); |
Sven Eckelmann | 925a667 | 2012-05-12 02:09:35 +0200 | [diff] [blame] | 715 | batadv_ring_buffer_set(neigh_node->tq_recv, |
| 716 | &neigh_node->tq_index, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 717 | batadv_ogm_packet->tq); |
Sven Eckelmann | 925a667 | 2012-05-12 02:09:35 +0200 | [diff] [blame] | 718 | neigh_node->tq_avg = batadv_ring_buffer_avg(neigh_node->tq_recv); |
Marek Lindner | e3b0d0d | 2012-03-17 15:28:32 +0800 | [diff] [blame] | 719 | spin_unlock_bh(&neigh_node->lq_update_lock); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 720 | |
| 721 | if (!is_duplicate) { |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 722 | orig_node->last_ttl = batadv_ogm_packet->header.ttl; |
| 723 | neigh_node->last_ttl = batadv_ogm_packet->header.ttl; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 724 | } |
| 725 | |
Sven Eckelmann | 30d3c51 | 2012-05-12 02:09:36 +0200 | [diff] [blame] | 726 | batadv_bonding_candidate_add(orig_node, neigh_node); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 727 | |
| 728 | /* if this neighbor already is our next hop there is nothing |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 729 | * to change |
| 730 | */ |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 731 | router = batadv_orig_node_get_router(orig_node); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 732 | if (router == neigh_node) |
| 733 | goto update_tt; |
| 734 | |
| 735 | /* if this neighbor does not offer a better TQ we won't consider it */ |
| 736 | if (router && (router->tq_avg > neigh_node->tq_avg)) |
| 737 | goto update_tt; |
| 738 | |
| 739 | /* 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] | 740 | * won't consider it either |
| 741 | */ |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 742 | if (router && (neigh_node->tq_avg == router->tq_avg)) { |
| 743 | orig_node_tmp = router->orig_node; |
| 744 | spin_lock_bh(&orig_node_tmp->ogm_cnt_lock); |
Linus LĂĽssing | 7caf69f | 2012-09-18 03:01:08 +0200 | [diff] [blame] | 745 | if_num = router->if_incoming->if_num; |
| 746 | sum_orig = orig_node_tmp->bcast_own_sum[if_num]; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 747 | spin_unlock_bh(&orig_node_tmp->ogm_cnt_lock); |
| 748 | |
| 749 | orig_node_tmp = neigh_node->orig_node; |
| 750 | spin_lock_bh(&orig_node_tmp->ogm_cnt_lock); |
Linus LĂĽssing | 7caf69f | 2012-09-18 03:01:08 +0200 | [diff] [blame] | 751 | if_num = neigh_node->if_incoming->if_num; |
| 752 | sum_neigh = orig_node_tmp->bcast_own_sum[if_num]; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 753 | spin_unlock_bh(&orig_node_tmp->ogm_cnt_lock); |
| 754 | |
Sven Eckelmann | bbb1f90 | 2012-07-08 17:13:15 +0200 | [diff] [blame] | 755 | if (sum_orig >= sum_neigh) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 756 | goto update_tt; |
| 757 | } |
| 758 | |
Sven Eckelmann | 30d3c51 | 2012-05-12 02:09:36 +0200 | [diff] [blame] | 759 | batadv_update_route(bat_priv, orig_node, neigh_node); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 760 | |
| 761 | update_tt: |
| 762 | /* 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] | 763 | * sent through a primary interface |
| 764 | */ |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 765 | if (((batadv_ogm_packet->orig != ethhdr->h_source) && |
| 766 | (batadv_ogm_packet->header.ttl > 2)) || |
| 767 | (batadv_ogm_packet->flags & BATADV_PRIMARIES_FIRST_HOP)) |
Sven Eckelmann | 08c36d3 | 2012-05-12 02:09:39 +0200 | [diff] [blame] | 768 | batadv_tt_update_orig(bat_priv, orig_node, tt_buff, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 769 | batadv_ogm_packet->tt_num_changes, |
| 770 | batadv_ogm_packet->ttvn, |
| 771 | ntohs(batadv_ogm_packet->tt_crc)); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 772 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 773 | if (orig_node->gw_flags != batadv_ogm_packet->gw_flags) |
Sven Eckelmann | 7cf06bc | 2012-05-12 02:09:29 +0200 | [diff] [blame] | 774 | batadv_gw_node_update(bat_priv, orig_node, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 775 | batadv_ogm_packet->gw_flags); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 776 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 777 | orig_node->gw_flags = batadv_ogm_packet->gw_flags; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 778 | |
| 779 | /* restart gateway selection if fast or late switching was enabled */ |
| 780 | if ((orig_node->gw_flags) && |
Sven Eckelmann | cd646ab | 2012-06-03 22:19:18 +0200 | [diff] [blame] | 781 | (atomic_read(&bat_priv->gw_mode) == BATADV_GW_MODE_CLIENT) && |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 782 | (atomic_read(&bat_priv->gw_sel_class) > 2)) |
Sven Eckelmann | 7cf06bc | 2012-05-12 02:09:29 +0200 | [diff] [blame] | 783 | batadv_gw_check_election(bat_priv, orig_node); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 784 | |
| 785 | goto out; |
| 786 | |
| 787 | unlock: |
| 788 | rcu_read_unlock(); |
| 789 | out: |
| 790 | if (neigh_node) |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 791 | batadv_neigh_node_free_ref(neigh_node); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 792 | if (router) |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 793 | batadv_neigh_node_free_ref(router); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 794 | } |
| 795 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 796 | static int batadv_iv_ogm_calc_tq(struct batadv_orig_node *orig_node, |
| 797 | struct batadv_orig_node *orig_neigh_node, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 798 | struct batadv_ogm_packet *batadv_ogm_packet, |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 799 | struct batadv_hard_iface *if_incoming) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 800 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 801 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
| 802 | struct batadv_neigh_node *neigh_node = NULL, *tmp_neigh_node; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 803 | uint8_t total_count; |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 804 | uint8_t orig_eq_count, neigh_rq_count, neigh_rq_inv, tq_own; |
| 805 | unsigned int neigh_rq_inv_cube, neigh_rq_max_cube; |
| 806 | int tq_asym_penalty, inv_asym_penalty, ret = 0; |
| 807 | unsigned int combined_tq; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 808 | |
| 809 | /* find corresponding one hop neighbor */ |
| 810 | rcu_read_lock(); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 811 | hlist_for_each_entry_rcu(tmp_neigh_node, |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 812 | &orig_neigh_node->neigh_list, list) { |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 813 | if (!batadv_compare_eth(tmp_neigh_node->addr, |
| 814 | orig_neigh_node->orig)) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 815 | continue; |
| 816 | |
| 817 | if (tmp_neigh_node->if_incoming != if_incoming) |
| 818 | continue; |
| 819 | |
| 820 | if (!atomic_inc_not_zero(&tmp_neigh_node->refcount)) |
| 821 | continue; |
| 822 | |
| 823 | neigh_node = tmp_neigh_node; |
| 824 | break; |
| 825 | } |
| 826 | rcu_read_unlock(); |
| 827 | |
| 828 | if (!neigh_node) |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 829 | neigh_node = batadv_iv_ogm_neigh_new(if_incoming, |
| 830 | orig_neigh_node->orig, |
| 831 | orig_neigh_node, |
| 832 | orig_neigh_node, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 833 | batadv_ogm_packet->seqno); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 834 | |
| 835 | if (!neigh_node) |
| 836 | goto out; |
| 837 | |
Marek Lindner | d7b2a97 | 2012-03-01 15:35:19 +0800 | [diff] [blame] | 838 | /* if orig_node is direct neighbor update neigh_node last_seen */ |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 839 | if (orig_node == orig_neigh_node) |
Marek Lindner | d7b2a97 | 2012-03-01 15:35:19 +0800 | [diff] [blame] | 840 | neigh_node->last_seen = jiffies; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 841 | |
Marek Lindner | d7b2a97 | 2012-03-01 15:35:19 +0800 | [diff] [blame] | 842 | orig_node->last_seen = jiffies; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 843 | |
| 844 | /* find packet count of corresponding one hop neighbor */ |
| 845 | spin_lock_bh(&orig_node->ogm_cnt_lock); |
| 846 | orig_eq_count = orig_neigh_node->bcast_own_sum[if_incoming->if_num]; |
| 847 | neigh_rq_count = neigh_node->real_packet_count; |
| 848 | spin_unlock_bh(&orig_node->ogm_cnt_lock); |
| 849 | |
| 850 | /* pay attention to not get a value bigger than 100 % */ |
Sven Eckelmann | c67893d | 2012-07-08 18:33:51 +0200 | [diff] [blame] | 851 | if (orig_eq_count > neigh_rq_count) |
| 852 | total_count = neigh_rq_count; |
| 853 | else |
| 854 | total_count = orig_eq_count; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 855 | |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 856 | /* if we have too few packets (too less data) we set tq_own to zero |
| 857 | * if we receive too few packets it is not considered bidirectional |
| 858 | */ |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 859 | if (total_count < BATADV_TQ_LOCAL_BIDRECT_SEND_MINIMUM || |
| 860 | neigh_rq_count < BATADV_TQ_LOCAL_BIDRECT_RECV_MINIMUM) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 861 | tq_own = 0; |
| 862 | else |
| 863 | /* neigh_node->real_packet_count is never zero as we |
| 864 | * only purge old information when getting new |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 865 | * information |
| 866 | */ |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 867 | tq_own = (BATADV_TQ_MAX_VALUE * total_count) / neigh_rq_count; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 868 | |
Sven Eckelmann | 21a1236 | 2012-03-07 09:07:46 +0100 | [diff] [blame] | 869 | /* 1 - ((1-x) ** 3), normalized to TQ_MAX_VALUE this does |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 870 | * affect the nearly-symmetric links only a little, but |
| 871 | * punishes asymmetric links more. This will give a value |
| 872 | * between 0 and TQ_MAX_VALUE |
| 873 | */ |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 874 | neigh_rq_inv = BATADV_TQ_LOCAL_WINDOW_SIZE - neigh_rq_count; |
| 875 | neigh_rq_inv_cube = neigh_rq_inv * neigh_rq_inv * neigh_rq_inv; |
| 876 | neigh_rq_max_cube = BATADV_TQ_LOCAL_WINDOW_SIZE * |
| 877 | BATADV_TQ_LOCAL_WINDOW_SIZE * |
| 878 | BATADV_TQ_LOCAL_WINDOW_SIZE; |
| 879 | inv_asym_penalty = BATADV_TQ_MAX_VALUE * neigh_rq_inv_cube; |
| 880 | inv_asym_penalty /= neigh_rq_max_cube; |
| 881 | tq_asym_penalty = BATADV_TQ_MAX_VALUE - inv_asym_penalty; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 882 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 883 | combined_tq = batadv_ogm_packet->tq * tq_own * tq_asym_penalty; |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 884 | combined_tq /= BATADV_TQ_MAX_VALUE * BATADV_TQ_MAX_VALUE; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 885 | batadv_ogm_packet->tq = combined_tq; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 886 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 887 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 888 | "bidirectional: orig = %-15pM neigh = %-15pM => own_bcast = %2i, real recv = %2i, local tq: %3i, asym_penalty: %3i, total tq: %3i\n", |
| 889 | orig_node->orig, orig_neigh_node->orig, total_count, |
| 890 | neigh_rq_count, tq_own, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 891 | tq_asym_penalty, batadv_ogm_packet->tq); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 892 | |
| 893 | /* if link has the minimum required transmission quality |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 894 | * consider it bidirectional |
| 895 | */ |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 896 | if (batadv_ogm_packet->tq >= BATADV_TQ_TOTAL_BIDRECT_LIMIT) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 897 | ret = 1; |
| 898 | |
| 899 | out: |
| 900 | if (neigh_node) |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 901 | batadv_neigh_node_free_ref(neigh_node); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 902 | return ret; |
| 903 | } |
| 904 | |
| 905 | /* processes a batman packet for all interfaces, adjusts the sequence number and |
| 906 | * finds out whether it is a duplicate. |
| 907 | * returns: |
| 908 | * 1 the packet is a duplicate |
| 909 | * 0 the packet has not yet been received |
| 910 | * -1 the packet is old and has been received while the seqno window |
| 911 | * was protected. Caller should drop it. |
| 912 | */ |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 913 | static int |
| 914 | batadv_iv_ogm_update_seqnos(const struct ethhdr *ethhdr, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 915 | const struct batadv_ogm_packet *batadv_ogm_packet, |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 916 | const struct batadv_hard_iface *if_incoming) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 917 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 918 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
| 919 | struct batadv_orig_node *orig_node; |
| 920 | struct batadv_neigh_node *tmp_neigh_node; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 921 | int is_duplicate = 0; |
| 922 | int32_t seq_diff; |
| 923 | int need_update = 0; |
| 924 | int set_mark, ret = -1; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 925 | uint32_t seqno = ntohl(batadv_ogm_packet->seqno); |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 926 | uint8_t *neigh_addr; |
Sven Eckelmann | bbb1f90 | 2012-07-08 17:13:15 +0200 | [diff] [blame] | 927 | uint8_t packet_count; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 928 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 929 | orig_node = batadv_get_orig_node(bat_priv, batadv_ogm_packet->orig); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 930 | if (!orig_node) |
| 931 | return 0; |
| 932 | |
| 933 | spin_lock_bh(&orig_node->ogm_cnt_lock); |
Al Viro | e0f5211 | 2012-04-22 07:46:29 +0100 | [diff] [blame] | 934 | seq_diff = seqno - orig_node->last_real_seqno; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 935 | |
| 936 | /* signalize caller that the packet is to be dropped. */ |
Antonio Quartulli | 1e5cc26 | 2012-02-26 15:39:42 +0100 | [diff] [blame] | 937 | if (!hlist_empty(&orig_node->neigh_list) && |
Sven Eckelmann | 30d3c51 | 2012-05-12 02:09:36 +0200 | [diff] [blame] | 938 | batadv_window_protected(bat_priv, seq_diff, |
| 939 | &orig_node->batman_seqno_reset)) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 940 | goto out; |
| 941 | |
| 942 | rcu_read_lock(); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 943 | hlist_for_each_entry_rcu(tmp_neigh_node, |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 944 | &orig_node->neigh_list, list) { |
Sven Eckelmann | 9b4a115 | 2012-05-12 13:48:53 +0200 | [diff] [blame] | 945 | is_duplicate |= batadv_test_bit(tmp_neigh_node->real_bits, |
| 946 | orig_node->last_real_seqno, |
| 947 | seqno); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 948 | |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 949 | neigh_addr = tmp_neigh_node->addr; |
| 950 | if (batadv_compare_eth(neigh_addr, ethhdr->h_source) && |
| 951 | tmp_neigh_node->if_incoming == if_incoming) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 952 | set_mark = 1; |
| 953 | else |
| 954 | set_mark = 0; |
| 955 | |
| 956 | /* if the window moved, set the update flag. */ |
Sven Eckelmann | 0f5f9322 | 2012-05-12 02:09:25 +0200 | [diff] [blame] | 957 | need_update |= batadv_bit_get_packet(bat_priv, |
| 958 | tmp_neigh_node->real_bits, |
| 959 | seq_diff, set_mark); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 960 | |
Sven Eckelmann | bbb1f90 | 2012-07-08 17:13:15 +0200 | [diff] [blame] | 961 | packet_count = bitmap_weight(tmp_neigh_node->real_bits, |
| 962 | BATADV_TQ_LOCAL_WINDOW_SIZE); |
| 963 | tmp_neigh_node->real_packet_count = packet_count; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 964 | } |
| 965 | rcu_read_unlock(); |
| 966 | |
| 967 | if (need_update) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 968 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 969 | "updating last_seqno: old %u, new %u\n", |
| 970 | orig_node->last_real_seqno, seqno); |
Al Viro | e0f5211 | 2012-04-22 07:46:29 +0100 | [diff] [blame] | 971 | orig_node->last_real_seqno = seqno; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 972 | } |
| 973 | |
| 974 | ret = is_duplicate; |
| 975 | |
| 976 | out: |
| 977 | spin_unlock_bh(&orig_node->ogm_cnt_lock); |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 978 | batadv_orig_node_free_ref(orig_node); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 979 | return ret; |
| 980 | } |
| 981 | |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 982 | static void batadv_iv_ogm_process(const struct ethhdr *ethhdr, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 983 | struct batadv_ogm_packet *batadv_ogm_packet, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 984 | const unsigned char *tt_buff, |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 985 | struct batadv_hard_iface *if_incoming) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 986 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 987 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
| 988 | struct batadv_hard_iface *hard_iface; |
| 989 | struct batadv_orig_node *orig_neigh_node, *orig_node; |
| 990 | struct batadv_neigh_node *router = NULL, *router_router = NULL; |
| 991 | struct batadv_neigh_node *orig_neigh_router = NULL; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 992 | int has_directlink_flag; |
| 993 | 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] | 994 | int is_broadcast = 0, is_bidirect; |
Marek Lindner | 75cd33f | 2012-03-01 15:35:16 +0800 | [diff] [blame] | 995 | bool is_single_hop_neigh = false; |
Marek Lindner | 13b2541 | 2012-03-11 06:17:53 +0800 | [diff] [blame] | 996 | bool is_from_best_next_hop = false; |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 997 | int is_duplicate, sameseq, simlar_ttl; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 998 | uint32_t if_incoming_seqno; |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 999 | uint8_t *prev_sender; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1000 | |
| 1001 | /* Silently drop when the batman packet is actually not a |
| 1002 | * correct packet. |
| 1003 | * |
| 1004 | * This might happen if a packet is padded (e.g. Ethernet has a |
| 1005 | * minimum frame length of 64 byte) and the aggregation interprets |
| 1006 | * it as an additional length. |
| 1007 | * |
| 1008 | * 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] | 1009 | * batadv_ogm_packet to detect whether the packet is the last |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1010 | * packet in an aggregation. Here we expect that the padding |
| 1011 | * is always zero (or not 0x01) |
| 1012 | */ |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1013 | if (batadv_ogm_packet->header.packet_type != BATADV_IV_OGM) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1014 | return; |
| 1015 | |
| 1016 | /* could be changed by schedule_own_packet() */ |
Marek Lindner | 1451151 | 2012-08-02 17:20:26 +0200 | [diff] [blame] | 1017 | if_incoming_seqno = atomic_read(&if_incoming->bat_iv.ogm_seqno); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1018 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1019 | if (batadv_ogm_packet->flags & BATADV_DIRECTLINK) |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 1020 | has_directlink_flag = 1; |
| 1021 | else |
| 1022 | has_directlink_flag = 0; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1023 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1024 | if (batadv_compare_eth(ethhdr->h_source, batadv_ogm_packet->orig)) |
Marek Lindner | 75cd33f | 2012-03-01 15:35:16 +0800 | [diff] [blame] | 1025 | is_single_hop_neigh = true; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1026 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1027 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Antonio Quartulli | c0275e2 | 2012-12-11 20:29:22 +0100 | [diff] [blame] | 1028 | "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] | 1029 | ethhdr->h_source, if_incoming->net_dev->name, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1030 | if_incoming->net_dev->dev_addr, batadv_ogm_packet->orig, |
| 1031 | batadv_ogm_packet->prev_sender, |
| 1032 | ntohl(batadv_ogm_packet->seqno), batadv_ogm_packet->ttvn, |
| 1033 | ntohs(batadv_ogm_packet->tt_crc), |
| 1034 | batadv_ogm_packet->tt_num_changes, batadv_ogm_packet->tq, |
| 1035 | batadv_ogm_packet->header.ttl, |
| 1036 | batadv_ogm_packet->header.version, has_directlink_flag); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1037 | |
| 1038 | rcu_read_lock(); |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 1039 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 1040 | if (hard_iface->if_status != BATADV_IF_ACTIVE) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1041 | continue; |
| 1042 | |
| 1043 | if (hard_iface->soft_iface != if_incoming->soft_iface) |
| 1044 | continue; |
| 1045 | |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1046 | if (batadv_compare_eth(ethhdr->h_source, |
| 1047 | hard_iface->net_dev->dev_addr)) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1048 | is_my_addr = 1; |
| 1049 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1050 | if (batadv_compare_eth(batadv_ogm_packet->orig, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1051 | hard_iface->net_dev->dev_addr)) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1052 | is_my_orig = 1; |
| 1053 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1054 | if (batadv_compare_eth(batadv_ogm_packet->prev_sender, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1055 | hard_iface->net_dev->dev_addr)) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1056 | is_my_oldorig = 1; |
| 1057 | |
| 1058 | if (is_broadcast_ether_addr(ethhdr->h_source)) |
| 1059 | is_broadcast = 1; |
| 1060 | } |
| 1061 | rcu_read_unlock(); |
| 1062 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1063 | if (batadv_ogm_packet->header.version != BATADV_COMPAT_VERSION) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1064 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1065 | "Drop packet: incompatible batman version (%i)\n", |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1066 | batadv_ogm_packet->header.version); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1067 | return; |
| 1068 | } |
| 1069 | |
| 1070 | if (is_my_addr) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1071 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1072 | "Drop packet: received my own broadcast (sender: %pM)\n", |
| 1073 | ethhdr->h_source); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1074 | return; |
| 1075 | } |
| 1076 | |
| 1077 | if (is_broadcast) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1078 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1079 | "Drop packet: ignoring all packets with broadcast source addr (sender: %pM)\n", |
| 1080 | ethhdr->h_source); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1081 | return; |
| 1082 | } |
| 1083 | |
| 1084 | if (is_my_orig) { |
| 1085 | unsigned long *word; |
| 1086 | int offset; |
Sven Eckelmann | 9b4a115 | 2012-05-12 13:48:53 +0200 | [diff] [blame] | 1087 | int32_t bit_pos; |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 1088 | int16_t if_num; |
| 1089 | uint8_t *weight; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1090 | |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 1091 | orig_neigh_node = batadv_get_orig_node(bat_priv, |
| 1092 | ethhdr->h_source); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1093 | if (!orig_neigh_node) |
| 1094 | return; |
| 1095 | |
| 1096 | /* neighbor has to indicate direct link and it has to |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 1097 | * come via the corresponding interface |
| 1098 | * save packet seqno for bidirectional check |
| 1099 | */ |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1100 | if (has_directlink_flag && |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1101 | batadv_compare_eth(if_incoming->net_dev->dev_addr, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1102 | batadv_ogm_packet->orig)) { |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 1103 | if_num = if_incoming->if_num; |
| 1104 | offset = if_num * BATADV_NUM_WORDS; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1105 | |
| 1106 | spin_lock_bh(&orig_neigh_node->ogm_cnt_lock); |
| 1107 | word = &(orig_neigh_node->bcast_own[offset]); |
Sven Eckelmann | 9b4a115 | 2012-05-12 13:48:53 +0200 | [diff] [blame] | 1108 | bit_pos = if_incoming_seqno - 2; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1109 | bit_pos -= ntohl(batadv_ogm_packet->seqno); |
Sven Eckelmann | 9b4a115 | 2012-05-12 13:48:53 +0200 | [diff] [blame] | 1110 | batadv_set_bit(word, bit_pos); |
Sven Eckelmann | 42d0b04 | 2012-06-03 22:19:17 +0200 | [diff] [blame] | 1111 | weight = &orig_neigh_node->bcast_own_sum[if_num]; |
| 1112 | *weight = bitmap_weight(word, |
| 1113 | BATADV_TQ_LOCAL_WINDOW_SIZE); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1114 | spin_unlock_bh(&orig_neigh_node->ogm_cnt_lock); |
| 1115 | } |
| 1116 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1117 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1118 | "Drop packet: originator packet from myself (via neighbor)\n"); |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 1119 | batadv_orig_node_free_ref(orig_neigh_node); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1120 | return; |
| 1121 | } |
| 1122 | |
| 1123 | if (is_my_oldorig) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1124 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1125 | "Drop packet: ignoring all rebroadcast echos (sender: %pM)\n", |
| 1126 | ethhdr->h_source); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1127 | return; |
| 1128 | } |
| 1129 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1130 | if (batadv_ogm_packet->flags & BATADV_NOT_BEST_NEXT_HOP) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1131 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1132 | "Drop packet: ignoring all packets not forwarded from the best next hop (sender: %pM)\n", |
| 1133 | ethhdr->h_source); |
Marek Lindner | 13b2541 | 2012-03-11 06:17:53 +0800 | [diff] [blame] | 1134 | return; |
| 1135 | } |
| 1136 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1137 | orig_node = batadv_get_orig_node(bat_priv, batadv_ogm_packet->orig); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1138 | if (!orig_node) |
| 1139 | return; |
| 1140 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1141 | is_duplicate = batadv_iv_ogm_update_seqnos(ethhdr, batadv_ogm_packet, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 1142 | if_incoming); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1143 | |
| 1144 | if (is_duplicate == -1) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1145 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1146 | "Drop packet: packet within seqno protection time (sender: %pM)\n", |
| 1147 | ethhdr->h_source); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1148 | goto out; |
| 1149 | } |
| 1150 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1151 | if (batadv_ogm_packet->tq == 0) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1152 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1153 | "Drop packet: originator packet with tq equal 0\n"); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1154 | goto out; |
| 1155 | } |
| 1156 | |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 1157 | router = batadv_orig_node_get_router(orig_node); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1158 | if (router) |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 1159 | router_router = batadv_orig_node_get_router(router->orig_node); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1160 | |
Marek Lindner | 13b2541 | 2012-03-11 06:17:53 +0800 | [diff] [blame] | 1161 | if ((router && router->tq_avg != 0) && |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1162 | (batadv_compare_eth(router->addr, ethhdr->h_source))) |
Marek Lindner | 13b2541 | 2012-03-11 06:17:53 +0800 | [diff] [blame] | 1163 | is_from_best_next_hop = true; |
| 1164 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1165 | prev_sender = batadv_ogm_packet->prev_sender; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1166 | /* avoid temporary routing loops */ |
| 1167 | if (router && router_router && |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1168 | (batadv_compare_eth(router->addr, prev_sender)) && |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1169 | !(batadv_compare_eth(batadv_ogm_packet->orig, prev_sender)) && |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1170 | (batadv_compare_eth(router->addr, router_router->addr))) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1171 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1172 | "Drop packet: ignoring all rebroadcast packets that may make me loop (sender: %pM)\n", |
| 1173 | ethhdr->h_source); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1174 | goto out; |
| 1175 | } |
| 1176 | |
| 1177 | /* if sender is a direct neighbor the sender mac equals |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 1178 | * originator mac |
| 1179 | */ |
Sven Eckelmann | c67893d | 2012-07-08 18:33:51 +0200 | [diff] [blame] | 1180 | if (is_single_hop_neigh) |
| 1181 | orig_neigh_node = orig_node; |
| 1182 | else |
| 1183 | orig_neigh_node = batadv_get_orig_node(bat_priv, |
| 1184 | ethhdr->h_source); |
| 1185 | |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1186 | if (!orig_neigh_node) |
| 1187 | goto out; |
| 1188 | |
Martin Hundebøll | d56b170 | 2013-01-25 11:12:39 +0100 | [diff] [blame] | 1189 | /* Update nc_nodes of the originator */ |
| 1190 | batadv_nc_update_nc_node(bat_priv, orig_node, orig_neigh_node, |
| 1191 | batadv_ogm_packet, is_single_hop_neigh); |
| 1192 | |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 1193 | orig_neigh_router = batadv_orig_node_get_router(orig_neigh_node); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1194 | |
| 1195 | /* drop packet if sender is not a direct neighbor and if we |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 1196 | * don't route towards it |
| 1197 | */ |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1198 | if (!is_single_hop_neigh && (!orig_neigh_router)) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1199 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1200 | "Drop packet: OGM via unknown neighbor!\n"); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1201 | goto out_neigh; |
| 1202 | } |
| 1203 | |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 1204 | is_bidirect = batadv_iv_ogm_calc_tq(orig_node, orig_neigh_node, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1205 | batadv_ogm_packet, if_incoming); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1206 | |
Sven Eckelmann | 30d3c51 | 2012-05-12 02:09:36 +0200 | [diff] [blame] | 1207 | batadv_bonding_save_primary(orig_node, orig_neigh_node, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1208 | batadv_ogm_packet); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1209 | |
| 1210 | /* update ranking if it is not a duplicate or has the same |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 1211 | * seqno and similar ttl as the non-duplicate |
| 1212 | */ |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1213 | sameseq = orig_node->last_real_seqno == ntohl(batadv_ogm_packet->seqno); |
| 1214 | simlar_ttl = orig_node->last_ttl - 3 <= batadv_ogm_packet->header.ttl; |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 1215 | if (is_bidirect && (!is_duplicate || (sameseq && simlar_ttl))) |
| 1216 | batadv_iv_ogm_orig_update(bat_priv, orig_node, ethhdr, |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1217 | batadv_ogm_packet, if_incoming, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 1218 | tt_buff, is_duplicate); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1219 | |
| 1220 | /* is single hop (direct) neighbor */ |
| 1221 | if (is_single_hop_neigh) { |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1222 | /* mark direct link on incoming interface */ |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1223 | batadv_iv_ogm_forward(orig_node, ethhdr, batadv_ogm_packet, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 1224 | is_single_hop_neigh, |
| 1225 | is_from_best_next_hop, if_incoming); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1226 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1227 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1228 | "Forwarding packet: rebroadcast neighbor packet with direct link flag\n"); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1229 | goto out_neigh; |
| 1230 | } |
| 1231 | |
| 1232 | /* multihop originator */ |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 1233 | if (!is_bidirect) { |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1234 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1235 | "Drop packet: not received via bidirectional link\n"); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1236 | goto out_neigh; |
| 1237 | } |
| 1238 | |
| 1239 | if (is_duplicate) { |
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 | "Drop packet: duplicate packet received\n"); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1242 | goto out_neigh; |
| 1243 | } |
| 1244 | |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 1245 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 1eda58b | 2012-05-12 13:48:58 +0200 | [diff] [blame] | 1246 | "Forwarding packet: rebroadcast originator packet\n"); |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1247 | batadv_iv_ogm_forward(orig_node, ethhdr, batadv_ogm_packet, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 1248 | is_single_hop_neigh, is_from_best_next_hop, |
| 1249 | if_incoming); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1250 | |
| 1251 | out_neigh: |
| 1252 | if ((orig_neigh_node) && (!is_single_hop_neigh)) |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 1253 | batadv_orig_node_free_ref(orig_neigh_node); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1254 | out: |
| 1255 | if (router) |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 1256 | batadv_neigh_node_free_ref(router); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1257 | if (router_router) |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 1258 | batadv_neigh_node_free_ref(router_router); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1259 | if (orig_neigh_router) |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 1260 | batadv_neigh_node_free_ref(orig_neigh_router); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1261 | |
Sven Eckelmann | 7d211ef | 2012-05-12 02:09:34 +0200 | [diff] [blame] | 1262 | batadv_orig_node_free_ref(orig_node); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1263 | } |
| 1264 | |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 1265 | static int batadv_iv_ogm_receive(struct sk_buff *skb, |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1266 | struct batadv_hard_iface *if_incoming) |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1267 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1268 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1269 | struct batadv_ogm_packet *batadv_ogm_packet; |
Marek Lindner | 8780dad | 2011-12-05 04:01:51 +0800 | [diff] [blame] | 1270 | struct ethhdr *ethhdr; |
| 1271 | int buff_pos = 0, packet_len; |
| 1272 | unsigned char *tt_buff, *packet_buff; |
Marek Lindner | c3e2931 | 2012-03-04 16:56:25 +0800 | [diff] [blame] | 1273 | bool ret; |
Sven Eckelmann | c67893d | 2012-07-08 18:33:51 +0200 | [diff] [blame] | 1274 | uint8_t *packet_pos; |
Marek Lindner | c3e2931 | 2012-03-04 16:56:25 +0800 | [diff] [blame] | 1275 | |
Sven Eckelmann | 7e071c7 | 2012-06-03 22:19:13 +0200 | [diff] [blame] | 1276 | ret = batadv_check_management_packet(skb, if_incoming, BATADV_OGM_HLEN); |
Marek Lindner | c3e2931 | 2012-03-04 16:56:25 +0800 | [diff] [blame] | 1277 | if (!ret) |
| 1278 | return NET_RX_DROP; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1279 | |
Marek Lindner | edbf12b | 2012-03-11 06:17:49 +0800 | [diff] [blame] | 1280 | /* did we receive a B.A.T.M.A.N. IV OGM packet on an interface |
| 1281 | * that does not have B.A.T.M.A.N. IV enabled ? |
| 1282 | */ |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 1283 | 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] | 1284 | return NET_RX_DROP; |
| 1285 | |
Sven Eckelmann | d69909d | 2012-06-03 22:19:20 +0200 | [diff] [blame] | 1286 | batadv_inc_counter(bat_priv, BATADV_CNT_MGMT_RX); |
| 1287 | batadv_add_counter(bat_priv, BATADV_CNT_MGMT_RX_BYTES, |
Martin Hundebøll | f821486 | 2012-04-20 17:02:45 +0200 | [diff] [blame] | 1288 | skb->len + ETH_HLEN); |
| 1289 | |
Marek Lindner | 8780dad | 2011-12-05 04:01:51 +0800 | [diff] [blame] | 1290 | packet_len = skb_headlen(skb); |
| 1291 | ethhdr = (struct ethhdr *)skb_mac_header(skb); |
| 1292 | packet_buff = skb->data; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1293 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_buff; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1294 | |
| 1295 | /* unpack the aggregated packets and process them one by one */ |
Marek Lindner | b47506d | 2013-03-04 10:39:49 +0800 | [diff] [blame] | 1296 | while (batadv_iv_ogm_aggr_packet(buff_pos, packet_len, |
| 1297 | batadv_ogm_packet->tt_num_changes)) { |
Sven Eckelmann | 7e071c7 | 2012-06-03 22:19:13 +0200 | [diff] [blame] | 1298 | tt_buff = packet_buff + buff_pos + BATADV_OGM_HLEN; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1299 | |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1300 | batadv_iv_ogm_process(ethhdr, batadv_ogm_packet, tt_buff, |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 1301 | if_incoming); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1302 | |
Sven Eckelmann | 7e071c7 | 2012-06-03 22:19:13 +0200 | [diff] [blame] | 1303 | buff_pos += BATADV_OGM_HLEN; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 1304 | buff_pos += batadv_tt_len(batadv_ogm_packet->tt_num_changes); |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1305 | |
Sven Eckelmann | c67893d | 2012-07-08 18:33:51 +0200 | [diff] [blame] | 1306 | packet_pos = packet_buff + buff_pos; |
| 1307 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; |
Marek Lindner | b47506d | 2013-03-04 10:39:49 +0800 | [diff] [blame] | 1308 | } |
Marek Lindner | c3e2931 | 2012-03-04 16:56:25 +0800 | [diff] [blame] | 1309 | |
| 1310 | kfree_skb(skb); |
| 1311 | return NET_RX_SUCCESS; |
Marek Lindner | fc95727 | 2011-07-30 12:04:12 +0200 | [diff] [blame] | 1312 | } |
Marek Lindner | 1c28047 | 2011-11-28 17:40:17 +0800 | [diff] [blame] | 1313 | |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 1314 | static struct batadv_algo_ops batadv_batman_iv __read_mostly = { |
Marek Lindner | 519d349 | 2012-04-18 17:15:57 +0800 | [diff] [blame] | 1315 | .name = "BATMAN_IV", |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 1316 | .bat_iface_enable = batadv_iv_ogm_iface_enable, |
| 1317 | .bat_iface_disable = batadv_iv_ogm_iface_disable, |
| 1318 | .bat_iface_update_mac = batadv_iv_ogm_iface_update_mac, |
| 1319 | .bat_primary_iface_set = batadv_iv_ogm_primary_iface_set, |
| 1320 | .bat_ogm_schedule = batadv_iv_ogm_schedule, |
| 1321 | .bat_ogm_emit = batadv_iv_ogm_emit, |
Marek Lindner | 1c28047 | 2011-11-28 17:40:17 +0800 | [diff] [blame] | 1322 | }; |
| 1323 | |
Sven Eckelmann | 81c524f | 2012-05-12 02:09:22 +0200 | [diff] [blame] | 1324 | int __init batadv_iv_init(void) |
Marek Lindner | 1c28047 | 2011-11-28 17:40:17 +0800 | [diff] [blame] | 1325 | { |
Marek Lindner | c3e2931 | 2012-03-04 16:56:25 +0800 | [diff] [blame] | 1326 | int ret; |
| 1327 | |
| 1328 | /* batman originator packet */ |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 1329 | ret = batadv_recv_handler_register(BATADV_IV_OGM, |
| 1330 | batadv_iv_ogm_receive); |
Marek Lindner | c3e2931 | 2012-03-04 16:56:25 +0800 | [diff] [blame] | 1331 | if (ret < 0) |
| 1332 | goto out; |
| 1333 | |
Sven Eckelmann | fe8bc39 | 2012-05-12 18:33:51 +0200 | [diff] [blame] | 1334 | ret = batadv_algo_register(&batadv_batman_iv); |
Marek Lindner | c3e2931 | 2012-03-04 16:56:25 +0800 | [diff] [blame] | 1335 | if (ret < 0) |
| 1336 | goto handler_unregister; |
| 1337 | |
| 1338 | goto out; |
| 1339 | |
| 1340 | handler_unregister: |
Sven Eckelmann | acd34af | 2012-06-03 22:19:21 +0200 | [diff] [blame] | 1341 | batadv_recv_handler_unregister(BATADV_IV_OGM); |
Marek Lindner | c3e2931 | 2012-03-04 16:56:25 +0800 | [diff] [blame] | 1342 | out: |
| 1343 | return ret; |
Marek Lindner | 1c28047 | 2011-11-28 17:40:17 +0800 | [diff] [blame] | 1344 | } |