diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/batman-adv/Makefile | 1 | ||||
| -rw-r--r-- | net/batman-adv/aggregation.c | 31 | ||||
| -rw-r--r-- | net/batman-adv/aggregation.h | 3 | ||||
| -rw-r--r-- | net/batman-adv/bat_iv_ogm.c | 639 | ||||
| -rw-r--r-- | net/batman-adv/bat_ogm.h | 30 | ||||
| -rw-r--r-- | net/batman-adv/hard-interface.c | 2 | ||||
| -rw-r--r-- | net/batman-adv/originator.c | 3 | ||||
| -rw-r--r-- | net/batman-adv/routing.c | 606 | ||||
| -rw-r--r-- | net/batman-adv/routing.h | 17 |
9 files changed, 698 insertions, 634 deletions
diff --git a/net/batman-adv/Makefile b/net/batman-adv/Makefile index 2de93d00631b..32935986af3b 100644 --- a/net/batman-adv/Makefile +++ b/net/batman-adv/Makefile @@ -21,6 +21,7 @@ obj-$(CONFIG_BATMAN_ADV) += batman-adv.o batman-adv-y += aggregation.o batman-adv-y += bat_debugfs.o +batman-adv-y += bat_iv_ogm.o batman-adv-y += bat_sysfs.o batman-adv-y += bitarray.o batman-adv-y += gateway_client.o diff --git a/net/batman-adv/aggregation.c b/net/batman-adv/aggregation.c index f20423f4a4d7..4716c9386f21 100644 --- a/net/batman-adv/aggregation.c +++ b/net/batman-adv/aggregation.c @@ -264,34 +264,3 @@ void add_bat_packet_to_list(struct bat_priv *bat_priv, spin_unlock_bh(&bat_priv->forw_bat_list_lock); } } - -/* unpack the aggregated packets and process them one by one */ -void receive_aggr_bat_packet(const struct ethhdr *ethhdr, - unsigned char *packet_buff, int packet_len, - struct hard_iface *if_incoming) -{ - struct batman_ogm_packet *batman_ogm_packet; - int buff_pos = 0; - unsigned char *tt_buff; - - batman_ogm_packet = (struct batman_ogm_packet *)packet_buff; - - do { - /* network to host order for our 32bit seqno and the - orig_interval */ - batman_ogm_packet->seqno = ntohl(batman_ogm_packet->seqno); - batman_ogm_packet->tt_crc = ntohs(batman_ogm_packet->tt_crc); - - tt_buff = packet_buff + buff_pos + BATMAN_OGM_LEN; - - receive_bat_packet(ethhdr, batman_ogm_packet, - tt_buff, if_incoming); - - buff_pos += BATMAN_OGM_LEN + - tt_len(batman_ogm_packet->tt_num_changes); - - batman_ogm_packet = (struct batman_ogm_packet *) - (packet_buff + buff_pos); - } while (aggregated_packet(buff_pos, packet_len, - batman_ogm_packet->tt_num_changes)); -} diff --git a/net/batman-adv/aggregation.h b/net/batman-adv/aggregation.h index 7fc23b028b2a..7a92e4c69ed0 100644 --- a/net/batman-adv/aggregation.h +++ b/net/batman-adv/aggregation.h @@ -38,8 +38,5 @@ void add_bat_packet_to_list(struct bat_priv *bat_priv, unsigned char *packet_buff, int packet_len, struct hard_iface *if_incoming, int own_packet, unsigned long send_time); -void receive_aggr_bat_packet(const struct ethhdr *ethhdr, - unsigned char *packet_buff, int packet_len, - struct hard_iface *if_incoming); #endif /* _NET_BATMAN_ADV_AGGREGATION_H_ */ diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c new file mode 100644 index 000000000000..6fa2d465b6cd --- /dev/null +++ b/net/batman-adv/bat_iv_ogm.c @@ -0,0 +1,639 @@ +/* + * Copyright (C) 2007-2011 B.A.T.M.A.N. contributors: + * + * Marek Lindner, Simon Wunderlich + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2 of the GNU General Public + * License as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA + * + */ + +#include "main.h" +#include "bat_ogm.h" +#include "translation-table.h" +#include "ring_buffer.h" +#include "originator.h" +#include "routing.h" +#include "gateway_common.h" +#include "gateway_client.h" +#include "hard-interface.h" +#include "send.h" + +/* is there another aggregated packet here? */ +static int bat_ogm_aggr_packet(int buff_pos, int packet_len, + int tt_num_changes) +{ + int next_buff_pos = buff_pos + BATMAN_OGM_LEN + tt_len(tt_num_changes); + + return (next_buff_pos <= packet_len) && + (next_buff_pos <= MAX_AGGREGATION_BYTES); +} + +static void bat_ogm_orig_update(struct bat_priv *bat_priv, + struct orig_node *orig_node, + const struct ethhdr *ethhdr, + const struct batman_ogm_packet + *batman_ogm_packet, + struct hard_iface *if_incoming, + const unsigned char *tt_buff, int is_duplicate) +{ + struct neigh_node *neigh_node = NULL, *tmp_neigh_node = NULL; + struct neigh_node *router = NULL; + struct orig_node *orig_node_tmp; + struct hlist_node *node; + uint8_t bcast_own_sum_orig, bcast_own_sum_neigh; + + bat_dbg(DBG_BATMAN, bat_priv, "update_originator(): " + "Searching and updating originator entry of received packet\n"); + + rcu_read_lock(); + hlist_for_each_entry_rcu(tmp_neigh_node, node, + &orig_node->neigh_list, list) { + if (compare_eth(tmp_neigh_node->addr, ethhdr->h_source) && + (tmp_neigh_node->if_incoming == if_incoming) && + atomic_inc_not_zero(&tmp_neigh_node->refcount)) { + if (neigh_node) + neigh_node_free_ref(neigh_node); + neigh_node = tmp_neigh_node; + continue; + } + + if (is_duplicate) + continue; + + spin_lock_bh(&tmp_neigh_node->tq_lock); + ring_buffer_set(tmp_neigh_node->tq_recv, + &tmp_neigh_node->tq_index, 0); + tmp_neigh_node->tq_avg = + ring_buffer_avg(tmp_neigh_node->tq_recv); + spin_unlock_bh(&tmp_neigh_node->tq_lock); + } + + if (!neigh_node) { + struct orig_node *orig_tmp; + + orig_tmp = get_orig_node(bat_priv, ethhdr->h_source); + if (!orig_tmp) + goto unlock; + + neigh_node = create_neighbor(orig_node, orig_tmp, + ethhdr->h_source, if_incoming); + + orig_node_free_ref(orig_tmp); + if (!neigh_node) + goto unlock; + } else + bat_dbg(DBG_BATMAN, bat_priv, + "Updating existing last-hop neighbor of originator\n"); + + rcu_read_unlock(); + + orig_node->flags = batman_ogm_packet->flags; + neigh_node->last_valid = jiffies; + + spin_lock_bh(&neigh_node->tq_lock); + ring_buffer_set(neigh_node->tq_recv, + &neigh_node->tq_index, + batman_ogm_packet->tq); + neigh_node->tq_avg = ring_buffer_avg(neigh_node->tq_recv); + spin_unlock_bh(&neigh_node->tq_lock); + + if (!is_duplicate) { + orig_node->last_ttl = batman_ogm_packet->ttl; + neigh_node->last_ttl = batman_ogm_packet->ttl; + } + + bonding_candidate_add(orig_node, neigh_node); + + /* if this neighbor already is our next hop there is nothing + * to change */ + router = orig_node_get_router(orig_node); + if (router == neigh_node) + goto update_tt; + + /* if this neighbor does not offer a better TQ we won't consider it */ + if (router && (router->tq_avg > neigh_node->tq_avg)) + goto update_tt; + + /* if the TQ is the same and the link not more symmetric we + * won't consider it either */ + if (router && (neigh_node->tq_avg == router->tq_avg)) { + orig_node_tmp = router->orig_node; + spin_lock_bh(&orig_node_tmp->ogm_cnt_lock); + bcast_own_sum_orig = + orig_node_tmp->bcast_own_sum[if_incoming->if_num]; + spin_unlock_bh(&orig_node_tmp->ogm_cnt_lock); + + orig_node_tmp = neigh_node->orig_node; + spin_lock_bh(&orig_node_tmp->ogm_cnt_lock); + bcast_own_sum_neigh = + orig_node_tmp->bcast_own_sum[if_incoming->if_num]; + spin_unlock_bh(&orig_node_tmp->ogm_cnt_lock); + + if (bcast_own_sum_orig >= bcast_own_sum_neigh) + goto update_tt; + } + + update_route(bat_priv, orig_node, neigh_node); + +update_tt: + /* I have to check for transtable changes only if the OGM has been + * sent through a primary interface */ + if (((batman_ogm_packet->orig != ethhdr->h_source) && + (batman_ogm_packet->ttl > 2)) || + (batman_ogm_packet->flags & PRIMARIES_FIRST_HOP)) + tt_update_orig(bat_priv, orig_node, tt_buff, + batman_ogm_packet->tt_num_changes, + batman_ogm_packet->ttvn, + batman_ogm_packet->tt_crc); + + if (orig_node->gw_flags != batman_ogm_packet->gw_flags) + gw_node_update(bat_priv, orig_node, + batman_ogm_packet->gw_flags); + + orig_node->gw_flags = batman_ogm_packet->gw_flags; + + /* restart gateway selection if fast or late switching was enabled */ + if ((orig_node->gw_flags) && + (atomic_read(&bat_priv->gw_mode) == GW_MODE_CLIENT) && + (atomic_read(&bat_priv->gw_sel_class) > 2)) + gw_check_election(bat_priv, orig_node); + + goto out; + +unlock: + rcu_read_unlock(); +out: + if (neigh_node) + neigh_node_free_ref(neigh_node); + if (router) + neigh_node_free_ref(router); +} + +static int bat_ogm_calc_tq(struct orig_node *orig_node, + struct orig_node *orig_neigh_node, + struct batman_ogm_packet *batman_ogm_packet, + struct hard_iface *if_incoming) +{ + struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface); + struct neigh_node *neigh_node = NULL, *tmp_neigh_node; + struct hlist_node *node; + uint8_t total_count; + uint8_t orig_eq_count, neigh_rq_count, tq_own; + int tq_asym_penalty, ret = 0; + + /* find corresponding one hop neighbor */ + rcu_read_lock(); + hlist_for_each_entry_rcu(tmp_neigh_node, node, + &orig_neigh_node->neigh_list, list) { + + if (!compare_eth(tmp_neigh_node->addr, orig_neigh_node->orig)) + continue; + + if (tmp_neigh_node->if_incoming != if_incoming) + continue; + + if (!atomic_inc_not_zero(&tmp_neigh_node->refcount)) + continue; + + neigh_node = tmp_neigh_node; + break; + } + rcu_read_unlock(); + + if (!neigh_node) + neigh_node = create_neighbor(orig_neigh_node, + orig_neigh_node, + orig_neigh_node->orig, + if_incoming); + + if (!neigh_node) + goto out; + + /* if orig_node is direct neighbor update neigh_node last_valid */ + if (orig_node == orig_neigh_node) + neigh_node->last_valid = jiffies; + + orig_node->last_valid = jiffies; + + /* find packet count of corresponding one hop neighbor */ + spin_lock_bh(&orig_node->ogm_cnt_lock); + orig_eq_count = orig_neigh_node->bcast_own_sum[if_incoming->if_num]; + neigh_rq_count = neigh_node->real_packet_count; + spin_unlock_bh(&orig_node->ogm_cnt_lock); + + /* pay attention to not get a value bigger than 100 % */ + total_count = (orig_eq_count > neigh_rq_count ? + neigh_rq_count : orig_eq_count); + + /* if we have too few packets (too less data) we set tq_own to zero */ + /* if we receive too few packets it is not considered bidirectional */ + if ((total_count < TQ_LOCAL_BIDRECT_SEND_MINIMUM) || + (neigh_rq_count < TQ_LOCAL_BIDRECT_RECV_MINIMUM)) + tq_own = 0; + else + /* neigh_node->real_packet_count is never zero as we + * only purge old information when getting new + * information */ + tq_own = (TQ_MAX_VALUE * total_count) / neigh_rq_count; + + /* + * 1 - ((1-x) ** 3), normalized to TQ_MAX_VALUE this does + * affect the nearly-symmetric links only a little, but + * punishes asymmetric links more. This will give a value + * between 0 and TQ_MAX_VALUE + */ + tq_asym_penalty = TQ_MAX_VALUE - (TQ_MAX_VALUE * + (TQ_LOCAL_WINDOW_SIZE - neigh_rq_count) * + (TQ_LOCAL_WINDOW_SIZE - neigh_rq_count) * + (TQ_LOCAL_WINDOW_SIZE - neigh_rq_count)) / + (TQ_LOCAL_WINDOW_SIZE * + TQ_LOCAL_WINDOW_SIZE * + TQ_LOCAL_WINDOW_SIZE); + + batman_ogm_packet->tq = ((batman_ogm_packet->tq * tq_own + * tq_asym_penalty) / + (TQ_MAX_VALUE * TQ_MAX_VALUE)); + + bat_dbg(DBG_BATMAN, bat_priv, + "bidirectional: " + "orig = %-15pM neigh = %-15pM => own_bcast = %2i, " + "real recv = %2i, local tq: %3i, asym_penalty: %3i, " + "total tq: %3i\n", + orig_node->orig, orig_neigh_node->orig, total_count, + neigh_rq_count, tq_own, tq_asym_penalty, batman_ogm_packet->tq); + + /* if link has the minimum required transmission quality + * consider it bidirectional */ + if (batman_ogm_packet->tq >= TQ_TOTAL_BIDRECT_LIMIT) + ret = 1; + +out: + if (neigh_node) + neigh_node_free_ref(neigh_node); + return ret; +} + +/* processes a batman packet for all interfaces, adjusts the sequence number and + * finds out whether it is a duplicate. + * returns: + * 1 the packet is a duplicate + * 0 the packet has not yet been received + * -1 the packet is old and has been received while the seqno window + * was protected. Caller should drop it. + */ +static int bat_ogm_update_seqnos(const struct ethhdr *ethhdr, + const struct batman_ogm_packet + *batman_ogm_packet, + const struct hard_iface *if_incoming) +{ + struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface); + struct orig_node *orig_node; + struct neigh_node *tmp_neigh_node; + struct hlist_node *node; + int is_duplicate = 0; + int32_t seq_diff; + int need_update = 0; + int set_mark, ret = -1; + + orig_node = get_orig_node(bat_priv, batman_ogm_packet->orig); + if (!orig_node) + return 0; + + spin_lock_bh(&orig_node->ogm_cnt_lock); + seq_diff = batman_ogm_packet->seqno - orig_node->last_real_seqno; + + /* signalize caller that the packet is to be dropped. */ + if (window_protected(bat_priv, seq_diff, + &orig_node->batman_seqno_reset)) + goto out; + + rcu_read_lock(); + hlist_for_each_entry_rcu(tmp_neigh_node, node, + &orig_node->neigh_list, list) { + + is_duplicate |= get_bit_status(tmp_neigh_node->real_bits, + orig_node->last_real_seqno, + batman_ogm_packet->seqno); + + if (compare_eth(tmp_neigh_node->addr, ethhdr->h_source) && + (tmp_neigh_node->if_incoming == if_incoming)) + set_mark = 1; + else + set_mark = 0; + + /* if the window moved, set the update flag. */ + need_update |= bit_get_packet(bat_priv, + tmp_neigh_node->real_bits, + seq_diff, set_mark); + + tmp_neigh_node->real_packet_count = + bit_packet_count(tmp_neigh_node->real_bits); + } + rcu_read_unlock(); + + if (need_update) { + bat_dbg(DBG_BATMAN, bat_priv, + "updating last_seqno: old %d, new %d\n", + orig_node->last_real_seqno, batman_ogm_packet->seqno); + orig_node->last_real_seqno = batman_ogm_packet->seqno; + } + + ret = is_duplicate; + +out: + spin_unlock_bh(&orig_node->ogm_cnt_lock); + orig_node_free_ref(orig_node); + return ret; +} + +static void bat_ogm_process(const struct ethhdr *ethhdr, + struct batman_ogm_packet *batman_ogm_packet, + const unsigned char *tt_buff, + struct hard_iface *if_incoming) +{ + struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface); + struct hard_iface *hard_iface; + struct orig_node *orig_neigh_node, *orig_node; + struct neigh_node *router = NULL, *router_router = NULL; + struct neigh_node *orig_neigh_router = NULL; + int has_directlink_flag; + int is_my_addr = 0, is_my_orig = 0, is_my_oldorig = 0; + int is_broadcast = 0, is_bidirectional, is_single_hop_neigh; + int is_duplicate; + uint32_t if_incoming_seqno; + + /* Silently drop when the batman packet is actually not a + * correct packet. + * + * This might happen if a packet is padded (e.g. Ethernet has a + * minimum frame length of 64 byte) and the aggregation interprets + * it as an additional length. + * + * TODO: A more sane solution would be to have a bit in the + * batman_ogm_packet to detect whether the packet is the last + * packet in an aggregation. Here we expect that the padding + * is always zero (or not 0x01) + */ + if (batman_ogm_packet->packet_type != BAT_OGM) + return; + + /* could be changed by schedule_own_packet() */ + if_incoming_seqno = atomic_read(&if_incoming->seqno); + + has_directlink_flag = (batman_ogm_packet->flags & DIRECTLINK ? 1 : 0); + + is_single_hop_neigh = (compare_eth(ethhdr->h_source, + batman_ogm_packet->orig) ? 1 : 0); + + bat_dbg(DBG_BATMAN, bat_priv, + "Received BATMAN packet via NB: %pM, IF: %s [%pM] " + "(from OG: %pM, via prev OG: %pM, seqno %d, ttvn %u, " + "crc %u, changes %u, td %d, TTL %d, V %d, IDF %d)\n", + ethhdr->h_source, if_incoming->net_dev->name, + if_incoming->net_dev->dev_addr, batman_ogm_packet->orig, + batman_ogm_packet->prev_sender, batman_ogm_packet->seqno, + batman_ogm_packet->ttvn, batman_ogm_packet->tt_crc, + batman_ogm_packet->tt_num_changes, batman_ogm_packet->tq, + batman_ogm_packet->ttl, batman_ogm_packet->version, + has_directlink_flag); + + rcu_read_lock(); + list_for_each_entry_rcu(hard_iface, &hardif_list, list) { + if (hard_iface->if_status != IF_ACTIVE) + continue; + + if (hard_iface->soft_iface != if_incoming->soft_iface) + continue; + + if (compare_eth(ethhdr->h_source, + hard_iface->net_dev->dev_addr)) + is_my_addr = 1; + + if (compare_eth(batman_ogm_packet->orig, + hard_iface->net_dev->dev_addr)) + is_my_orig = 1; + + if (compare_eth(batman_ogm_packet->prev_sender, + hard_iface->net_dev->dev_addr)) + is_my_oldorig = 1; + + if (is_broadcast_ether_addr(ethhdr->h_source)) + is_broadcast = 1; + } + rcu_read_unlock(); + + if (batman_ogm_packet->version != COMPAT_VERSION) { + bat_dbg(DBG_BATMAN, bat_priv, + "Drop packet: incompatible batman version (%i)\n", + batman_ogm_packet->version); + return; + } + + if (is_my_addr) { + bat_dbg(DBG_BATMAN, bat_priv, + "Drop packet: received my own broadcast (sender: %pM" + ")\n", + ethhdr->h_source); + return; + } + + if (is_broadcast) { + bat_dbg(DBG_BATMAN, bat_priv, "Drop packet: " + "ignoring all packets with broadcast source addr (sender: %pM" + ")\n", ethhdr->h_source); + return; + } + + if (is_my_orig) { + unsigned long *word; + int offset; + + orig_neigh_node = get_orig_node(bat_priv, ethhdr->h_source); + if (!orig_neigh_node) + return; + + /* neighbor has to indicate direct link and it has to + * come via the corresponding interface */ + /* save packet seqno for bidirectional check */ + if (has_directlink_flag && + compare_eth(if_incoming->net_dev->dev_addr, + batman_ogm_packet->orig)) { + offset = if_incoming->if_num * NUM_WORDS; + + spin_lock_bh(&orig_neigh_node->ogm_cnt_lock); + word = &(orig_neigh_node->bcast_own[offset]); + bit_mark(word, + if_incoming_seqno - + batman_ogm_packet->seqno - 2); + orig_neigh_node->bcast_own_sum[if_incoming->if_num] = + bit_packet_count(word); + spin_unlock_bh(&orig_neigh_node->ogm_cnt_lock); + } + + bat_dbg(DBG_BATMAN, bat_priv, "Drop packet: " + "originator packet from myself (via neighbor)\n"); + orig_node_free_ref(orig_neigh_node); + return; + } + + if (is_my_oldorig) { + bat_dbg(DBG_BATMAN, bat_priv, + "Drop packet: ignoring all rebroadcast echos (sender: " + "%pM)\n", ethhdr->h_source); + return; + } + + orig_node = get_orig_node(bat_priv, batman_ogm_packet->orig); + if (!orig_node) + return; + + is_duplicate = bat_ogm_update_seqnos(ethhdr, batman_ogm_packet, + if_incoming); + + if (is_duplicate == -1) { + bat_dbg(DBG_BATMAN, bat_priv, + "Drop packet: packet within seqno protection time " + "(sender: %pM)\n", ethhdr->h_source); + goto out; + } + + if (batman_ogm_packet->tq == 0) { + bat_dbg(DBG_BATMAN, bat_priv, + "Drop packet: originator packet with tq equal 0\n"); + goto out; + } + + router = orig_node_get_router(orig_node); + if (router) + router_router = orig_node_get_router(router->orig_node); + + /* avoid temporary routing loops */ + if (router && router_router && + (compare_eth(router->addr, batman_ogm_packet->prev_sender)) && + !(compare_eth(batman_ogm_packet->orig, + batman_ogm_packet->prev_sender)) && + (compare_eth(router->addr, router_router->addr))) { + bat_dbg(DBG_BATMAN, bat_priv, + "Drop packet: ignoring all rebroadcast packets that " + "may make me loop (sender: %pM)\n", ethhdr->h_source); + goto out; + } + + /* if sender is a direct neighbor the sender mac equals + * originator mac */ + orig_neigh_node = (is_single_hop_neigh ? + orig_node : + get_orig_node(bat_priv, ethhdr->h_source)); + if (!orig_neigh_node) + goto out; + + orig_neigh_router = orig_node_get_router(orig_neigh_node); + + /* drop packet if sender is not a direct neighbor and if we + * don't route towards it */ + if (!is_single_hop_neigh && (!orig_neigh_router)) { + bat_dbg(DBG_BATMAN, bat_priv, + "Drop packet: OGM via unknown neighbor!\n"); + goto out_neigh; + } + + is_bidirectional = bat_ogm_calc_tq(orig_node, orig_neigh_node, + batman_ogm_packet, if_incoming); + + bonding_save_primary(orig_node, orig_neigh_node, batman_ogm_packet); + + /* update ranking if it is not a duplicate or has the same + * seqno and similar ttl as the non-duplicate */ + if (is_bidirectional && + (!is_duplicate || + ((orig_node->last_real_seqno == batman_ogm_packet->seqno) && + (orig_node->last_ttl - 3 <= batman_ogm_packet->ttl)))) + bat_ogm_orig_update(bat_priv, orig_node, ethhdr, + batman_ogm_packet, if_incoming, + tt_buff, is_duplicate); + + /* is single hop (direct) neighbor */ + if (is_single_hop_neigh) { + + /* mark direct link on incoming interface */ + schedule_forward_packet(orig_node, ethhdr, batman_ogm_packet, + 1, if_incoming); + + bat_dbg(DBG_BATMAN, bat_priv, "Forwarding packet: " + "rebroadcast neighbor packet with direct link flag\n"); + goto out_neigh; + } + + /* multihop originator */ + if (!is_bidirectional) { + bat_dbg(DBG_BATMAN, bat_priv, + "Drop packet: not received via bidirectional link\n"); + goto out_neigh; + } + + if (is_duplicate) { + bat_dbg(DBG_BATMAN, bat_priv, + "Drop packet: duplicate packet received\n"); + goto out_neigh; + } + + bat_dbg(DBG_BATMAN, bat_priv, + "Forwarding packet: rebroadcast originator packet\n"); + schedule_forward_packet(orig_node, ethhdr, batman_ogm_packet, + 0, if_incoming); + +out_neigh: + if ((orig_neigh_node) && (!is_single_hop_neigh)) + orig_node_free_ref(orig_neigh_node); +out: + if (router) + neigh_node_free_ref(router); + if (router_router) + neigh_node_free_ref(router_router); + if (orig_neigh_router) + neigh_node_free_ref(orig_neigh_router); + + orig_node_free_ref(orig_node); +} + +void bat_ogm_receive(const struct ethhdr *ethhdr, unsigned char *packet_buff, + int packet_len, struct hard_iface *if_incoming) +{ + struct batman_ogm_packet *batman_ogm_packet; + int buff_pos = 0; + unsigned char *tt_buff; + + batman_ogm_packet = (struct batman_ogm_packet *)packet_buff; + + /* unpack the aggregated packets and process them one by one */ + do { + /* network to host order for our 32bit seqno and the + orig_interval */ + batman_ogm_packet->seqno = ntohl(batman_ogm_packet->seqno); + batman_ogm_packet->tt_crc = ntohs(batman_ogm_packet->tt_crc); + + tt_buff = packet_buff + buff_pos + BATMAN_OGM_LEN; + + bat_ogm_process(ethhdr, batman_ogm_packet, + tt_buff, if_incoming); + + buff_pos += BATMAN_OGM_LEN + + tt_len(batman_ogm_packet->tt_num_changes); + + batman_ogm_packet = (struct batman_ogm_packet *) + (packet_buff + buff_pos); + } while (bat_ogm_aggr_packet(buff_pos, packet_len, + batman_ogm_packet->tt_num_changes)); +} diff --git a/net/batman-adv/bat_ogm.h b/net/batman-adv/bat_ogm.h new file mode 100644 index 000000000000..bdd3d1eb4c20 --- /dev/null +++ b/net/batman-adv/bat_ogm.h @@ -0,0 +1,30 @@ +/* + * Copyright (C) 2007-2011 B.A.T.M.A.N. contributors: + * + * Marek Lindner, Simon Wunderlich + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2 of the GNU General Public + * License as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA + * + */ + +#ifndef _NET_BATMAN_ADV_OGM_H_ +#define _NET_BATMAN_ADV_OGM_H_ + +#include "main.h" + +void bat_ogm_receive(const struct ethhdr *ethhdr, unsigned char *packet_buff, + int packet_len, struct hard_iface *if_incoming); + +#endif /* _NET_BATMAN_ADV_OGM_H_ */ diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c index cf9f4afafdfa..cfee0178ec62 100644 --- a/net/batman-adv/hard-interface.c +++ b/net/batman-adv/hard-interface.c @@ -632,7 +632,7 @@ static int batman_skb_recv(struct sk_buff *skb, struct net_device *dev, switch (batman_ogm_packet->packet_type) { /* batman originator packet */ case BAT_OGM: - ret = recv_bat_packet(skb, hard_iface); + ret = recv_bat_ogm_packet(skb, hard_iface); break; /* batman icmp packet */ diff --git a/net/batman-adv/originator.c b/net/batman-adv/originator.c index d448018e514f..cd7d2566ff5f 100644 --- a/net/batman-adv/originator.c +++ b/net/batman-adv/originator.c @@ -336,8 +336,7 @@ static bool purge_orig_node(struct bat_priv *bat_priv, } else { if (purge_orig_neighbors(bat_priv, orig_node, &best_neigh_node)) { - update_routes(bat_priv, orig_node, - best_neigh_node); + update_route(bat_priv, orig_node, best_neigh_node); } } diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c index 6efd1d0da54a..f961cc5eade5 100644 --- a/net/batman-adv/routing.c +++ b/net/batman-adv/routing.c @@ -22,18 +22,14 @@ #include "main.h" #include "routing.h" #include "send.h" -#include "hash.h" #include "soft-interface.h" #include "hard-interface.h" #include "icmp_socket.h" #include "translation-table.h" #include "originator.h" -#include "ring_buffer.h" #include "vis.h" -#include "aggregation.h" -#include "gateway_common.h" -#include "gateway_client.h" #include "unicast.h" +#include "bat_ogm.h" void slide_own_bcast_window(struct hard_iface *hard_iface) { @@ -64,9 +60,9 @@ void slide_own_bcast_window(struct hard_iface *hard_iface) } } -static void update_route(struct bat_priv *bat_priv, - struct orig_node *orig_node, - struct neigh_node *neigh_node) +static void _update_route(struct bat_priv *bat_priv, + struct orig_node *orig_node, + struct neigh_node *neigh_node) { struct neigh_node *curr_router; @@ -110,8 +106,8 @@ static void update_route(struct bat_priv *bat_priv, neigh_node_free_ref(curr_router); } -void update_routes(struct bat_priv *bat_priv, struct orig_node *orig_node, - struct neigh_node *neigh_node) +void update_route(struct bat_priv *bat_priv, struct orig_node *orig_node, + struct neigh_node *neigh_node) { struct neigh_node *router = NULL; @@ -121,117 +117,13 @@ void update_routes(struct bat_priv *bat_priv, struct orig_node *orig_node, router = orig_node_get_router(orig_node); if (router != neigh_node) - update_route(bat_priv, orig_node, neigh_node); + _update_route(bat_priv, orig_node, neigh_node); out: if (router) neigh_node_free_ref(router); } -static int is_bidirectional_neigh(struct orig_node *orig_node, - struct orig_node *orig_neigh_node, - struct batman_ogm_packet *batman_ogm_packet, - struct hard_iface *if_incoming) -{ - struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface); - struct neigh_node *neigh_node = NULL, *tmp_neigh_node; - struct hlist_node *node; - uint8_t total_count; - uint8_t orig_eq_count, neigh_rq_count, tq_own; - int tq_asym_penalty, ret = 0; - - /* find corresponding one hop neighbor */ - rcu_read_lock(); - hlist_for_each_entry_rcu(tmp_neigh_node, node, - &orig_neigh_node->neigh_list, list) { - - if (!compare_eth(tmp_neigh_node->addr, orig_neigh_node->orig)) - continue; - - if (tmp_neigh_node->if_incoming != if_incoming) - continue; - - if (!atomic_inc_not_zero(&tmp_neigh_node->refcount)) - continue; - - neigh_node = tmp_neigh_node; - break; - } - rcu_read_unlock(); - - if (!neigh_node) - neigh_node = create_neighbor(orig_neigh_node, - orig_neigh_node, - orig_neigh_node->orig, - if_incoming); - - if (!neigh_node) - goto out; - - /* if orig_node is direct neighbor update neigh_node last_valid */ - if (orig_node == orig_neigh_node) - neigh_node->last_valid = jiffies; - - orig_node->last_valid = jiffies; - - /* find packet count of corresponding one hop neighbor */ - spin_lock_bh(&orig_node->ogm_cnt_lock); - orig_eq_count = orig_neigh_node->bcast_own_sum[if_incoming->if_num]; - neigh_rq_count = neigh_node->real_packet_count; - spin_unlock_bh(&orig_node->ogm_cnt_lock); - - /* pay attention to not get a value bigger than 100 % */ - total_count = (orig_eq_count > neigh_rq_count ? - neigh_rq_count : orig_eq_count); - - /* if we have too few packets (too less data) we set tq_own to zero */ - /* if we receive too few packets it is not considered bidirectional */ - if ((total_count < TQ_LOCAL_BIDRECT_SEND_MINIMUM) || - (neigh_rq_count < TQ_LOCAL_BIDRECT_RECV_MINIMUM)) - tq_own = 0; - else - /* neigh_node->real_packet_count is never zero as we - * only purge old information when getting new - * information */ - tq_own = (TQ_MAX_VALUE * total_count) / neigh_rq_count; - - /* - * 1 - ((1-x) ** 3), normalized to TQ_MAX_VALUE this does - * affect the nearly-symmetric links only a little, but - * punishes asymmetric links more. This will give a value - * between 0 and TQ_MAX_VALUE - */ - tq_asym_penalty = TQ_MAX_VALUE - (TQ_MAX_VALUE * - (TQ_LOCAL_WINDOW_SIZE - neigh_rq_count) * - (TQ_LOCAL_WINDOW_SIZE - neigh_rq_count) * - (TQ_LOCAL_WINDOW_SIZE - neigh_rq_count)) / - (TQ_LOCAL_WINDOW_SIZE * - TQ_LOCAL_WINDOW_SIZE * - TQ_LOCAL_WINDOW_SIZE); - - batman_ogm_packet->tq = ((batman_ogm_packet->tq * tq_own - * tq_asym_penalty) / - (TQ_MAX_VALUE * TQ_MAX_VALUE)); - - bat_dbg(DBG_BATMAN, bat_priv, - "bidirectional: " - "orig = %-15pM neigh = %-15pM => own_bcast = %2i, " - "real recv = %2i, local tq: %3i, asym_penalty: %3i, " - "total tq: %3i\n", - orig_node->orig, orig_neigh_node->orig, total_count, - neigh_rq_count, tq_own, tq_asym_penalty, batman_ogm_packet->tq); - - /* if link has the minimum required transmission quality - * consider it bidirectional */ - if (batman_ogm_packet->tq >= TQ_TOTAL_BIDRECT_LIMIT) - ret = 1; - -out: - if (neigh_node) - neigh_node_free_ref(neigh_node); - return ret; -} - /* caller must hold the neigh_list_lock */ void bonding_candidate_del(struct orig_node *orig_node, struct neigh_node *neigh_node) @@ -249,8 +141,8 @@ out: return; } -static void bonding_candidate_add(struct orig_node *orig_node, - struct neigh_node *neigh_node) +void bonding_candidate_add(struct orig_node *orig_node, + struct neigh_node *neigh_node) { struct hlist_node *node; struct neigh_node *tmp_neigh_node, *router = NULL; @@ -320,10 +212,9 @@ out: } /* copy primary address for bonding */ -static void bonding_save_primary(const struct orig_node *orig_node, - struct orig_node *orig_neigh_node, - const struct batman_ogm_packet - *batman_ogm_packet) +void bonding_save_primary(const struct orig_node *orig_node, + struct orig_node *orig_neigh_node, + const struct batman_ogm_packet *batman_ogm_packet) { if (!(batman_ogm_packet->flags & PRIMARIES_FIRST_HOP)) return; @@ -331,153 +222,13 @@ static void bonding_save_primary(const struct orig_node *orig_node, memcpy(orig_neigh_node->primary_addr, orig_node->orig, ETH_ALEN); } -static void update_orig(struct bat_priv *bat_priv, struct orig_node *orig_node, - const struct ethhdr *ethhdr, - const struct batman_ogm_packet *batman_ogm_packet, - struct hard_iface *if_incoming, - const unsigned char *tt_buff, int is_duplicate) -{ - struct neigh_node *neigh_node = NULL, *tmp_neigh_node = NULL; - struct neigh_node *router = NULL; - struct orig_node *orig_node_tmp; - struct hlist_node *node; - uint8_t bcast_own_sum_orig, bcast_own_sum_neigh; - - bat_dbg(DBG_BATMAN, bat_priv, "update_originator(): " - "Searching and updating originator entry of received packet\n"); - - rcu_read_lock(); - hlist_for_each_entry_rcu(tmp_neigh_node, node, - &orig_node->neigh_list, list) { - if (compare_eth(tmp_neigh_node->addr, ethhdr->h_source) && - (tmp_neigh_node->if_incoming == if_incoming) && - atomic_inc_not_zero(&tmp_neigh_node->refcount)) { - if (neigh_node) - neigh_node_free_ref(neigh_node); - neigh_node = tmp_neigh_node; - continue; - } - - if (is_duplicate) - continue; - - spin_lock_bh(&tmp_neigh_node->tq_lock); - ring_buffer_set(tmp_neigh_node->tq_recv, - &tmp_neigh_node->tq_index, 0); - tmp_neigh_node->tq_avg = - ring_buffer_avg(tmp_neigh_node->tq_recv); - spin_unlock_bh(&tmp_neigh_node->tq_lock); - } - - if (!neigh_node) { - struct orig_node *orig_tmp; - - orig_tmp = get_orig_node(bat_priv, ethhdr->h_source); - if (!orig_tmp) - goto unlock; - - neigh_node = create_neighbor(orig_node, orig_tmp, - ethhdr->h_source, if_incoming); - - orig_node_free_ref(orig_tmp); - if (!neigh_node) - goto unlock; - } else - bat_dbg(DBG_BATMAN, bat_priv, - "Updating existing last-hop neighbor of originator\n"); - - rcu_read_unlock(); - - orig_node->flags = batman_ogm_packet->flags; - neigh_node->last_valid = jiffies; - - spin_lock_bh(&neigh_node->tq_lock); - ring_buffer_set(neigh_node->tq_recv, - &neigh_node->tq_index, - batman_ogm_packet->tq); - neigh_node->tq_avg = ring_buffer_avg(neigh_node->tq_recv); - spin_unlock_bh(&neigh_node->tq_lock); - - if (!is_duplicate) { - orig_node->last_ttl = batman_ogm_packet->ttl; - neigh_node->last_ttl = batman_ogm_packet->ttl; - } - - bonding_candidate_add(orig_node, neigh_node); - - /* if this neighbor already is our next hop there is nothing - * to change */ - router = orig_node_get_router(orig_node); - if (router == neigh_node) - goto update_tt; - - /* if this neighbor does not offer a better TQ we won't consider it */ - if (router && (router->tq_avg > neigh_node->tq_avg)) - goto update_tt; - - /* if the TQ is the same and the link not more symmetric we - * won't consider it either */ - if (router && (neigh_node->tq_avg == router->tq_avg)) { - orig_node_tmp = router->orig_node; - spin_lock_bh(&orig_node_tmp->ogm_cnt_lock); - bcast_own_sum_orig = - orig_node_tmp->bcast_own_sum[if_incoming->if_num]; - spin_unlock_bh(&orig_node_tmp->ogm_cnt_lock); - - orig_node_tmp = neigh_node->orig_node; - spin_lock_bh(&orig_node_tmp->ogm_cnt_lock); - bcast_own_sum_neigh = - orig_node_tmp->bcast_own_sum[if_incoming->if_num]; - spin_unlock_bh(&orig_node_tmp->ogm_cnt_lock); - - if (bcast_own_sum_orig >= bcast_own_sum_neigh) - goto update_tt; - } - - update_routes(bat_priv, orig_node, neigh_node); - -update_tt: - /* I have to check for transtable changes only if the OGM has been - * sent through a primary interface */ - if (((batman_ogm_packet->orig != ethhdr->h_source) && - (batman_ogm_packet->ttl > 2)) || - (batman_ogm_packet->flags & PRIMARIES_FIRST_HOP)) - tt_update_orig(bat_priv, orig_node, tt_buff, - batman_ogm_packet->tt_num_changes, - batman_ogm_packet->ttvn, - batman_ogm_packet->tt_crc); - - if (orig_node->gw_flags != batman_ogm_packet->gw_flags) - gw_node_update(bat_priv, orig_node, - batman_ogm_packet->gw_flags); - - orig_node->gw_flags = batman_ogm_packet->gw_flags; - - /* restart gateway selection if fast or late switching was enabled */ - if ((orig_node->gw_flags) && - (atomic_read(&bat_priv->gw_mode) == GW_MODE_CLIENT) && - (atomic_read(&bat_priv->gw_sel_class) > 2)) - gw_check_election(bat_priv, orig_node); - - goto out; - -unlock: - rcu_read_unlock(); -out: - if (neigh_node) - neigh_node_free_ref(neigh_node); - if (router) - neigh_node_free_ref(router); -} - /* checks whether the host restarted and is in the protection time. * returns: * 0 if the packet is to be accepted * 1 if the packet is to be ignored. */ -static int window_protected(struct bat_priv *bat_priv, - int32_t seq_num_diff, - unsigned long *last_reset) +int window_protected(struct bat_priv *bat_priv, int32_t seq_num_diff, + unsigned long *last_reset) { if ((seq_num_diff <= -TQ_LOCAL_WINDOW_SIZE) || (seq_num_diff >= EXPECTED_SEQNO_RANGE)) { @@ -495,329 +246,7 @@ static int window_protected(struct bat_priv *bat_priv, return 0; } -/* processes a batman packet for all interfaces, adjusts the sequence number and - * finds out whether it is a duplicate. - * returns: - * 1 the packet is a duplicate - * 0 the packet has not yet been received - * -1 the packet is old and has been received while the seqno window - * was protected. Caller should drop it. - */ -static int count_real_packets(const struct ethhdr *ethhdr, - const struct batman_ogm_packet *batman_ogm_packet, - const struct hard_iface *if_incoming) -{ - struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface); - struct orig_node *orig_node; - struct neigh_node *tmp_neigh_node; - struct hlist_node *node; - int is_duplicate = 0; - int32_t seq_diff; - int need_update = 0; - int set_mark, ret = -1; - - orig_node = get_orig_node(bat_priv, batman_ogm_packet->orig); - if (!orig_node) - return 0; - - spin_lock_bh(&orig_node->ogm_cnt_lock); - seq_diff = batman_ogm_packet->seqno - orig_node->last_real_seqno; - - /* signalize caller that the packet is to be dropped. */ - if (window_protected(bat_priv, seq_diff, - &orig_node->batman_seqno_reset)) - goto out; - - rcu_read_lock(); - hlist_for_each_entry_rcu(tmp_neigh_node, node, - &orig_node->neigh_list, list) { - - is_duplicate |= get_bit_status(tmp_neigh_node->real_bits, - orig_node->last_real_seqno, - batman_ogm_packet->seqno); - - if (compare_eth(tmp_neigh_node->addr, ethhdr->h_source) && - (tmp_neigh_node->if_incoming == if_incoming)) - set_mark = 1; - else - set_mark = 0; - - /* if the window moved, set the update flag. */ - need_update |= bit_get_packet(bat_priv, - tmp_neigh_node->real_bits, - seq_diff, set_mark); - - tmp_neigh_node->real_packet_count = - bit_packet_count(tmp_neigh_node->real_bits); - } - rcu_read_unlock(); - - if (need_update) { - bat_dbg(DBG_BATMAN, bat_priv, - "updating last_seqno: old %d, new %d\n", - orig_node->last_real_seqno, batman_ogm_packet->seqno); - orig_node->last_real_seqno = batman_ogm_packet->seqno; - } - - ret = is_duplicate; - -out: - spin_unlock_bh(&orig_node->ogm_cnt_lock); - orig_node_free_ref(orig_node); - return ret; -} - -void receive_bat_packet(const struct ethhdr *ethhdr, - struct batman_ogm_packet *batman_ogm_packet, - const unsigned char *tt_buff, - struct hard_iface *if_incoming) -{ - struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface); - struct hard_iface *hard_iface; - struct orig_node *orig_neigh_node, *orig_node; - struct neigh_node *router = NULL, *router_router = NULL; - struct neigh_node *orig_neigh_router = NULL; - int has_directlink_flag; - int is_my_addr = 0, is_my_orig = 0, is_my_oldorig = 0; - int is_broadcast = 0, is_bidirectional, is_single_hop_neigh; - int is_duplicate; - uint32_t if_incoming_seqno; - - /* Silently drop when the batman packet is actually not a - * correct packet. - * - * This might happen if a packet is padded (e.g. Ethernet has a - * minimum frame length of 64 byte) and the aggregation interprets - * it as an additional length. - * - * TODO: A more sane solution would be to have a bit in the - * batman_ogm_packet to detect whether the packet is the last - * packet in an aggregation. Here we expect that the padding - * is always zero (or not 0x01) - */ - if (batman_ogm_packet->packet_type != BAT_OGM) - return; - - /* could be changed by schedule_own_packet() */ - if_incoming_seqno = atomic_read(&if_incoming->seqno); - - has_directlink_flag = (batman_ogm_packet->flags & DIRECTLINK ? 1 : 0); - - is_single_hop_neigh = (compare_eth(ethhdr->h_source, - batman_ogm_packet->orig) ? 1 : 0); - - bat_dbg(DBG_BATMAN, bat_priv, - "Received BATMAN packet via NB: %pM, IF: %s [%pM] " - "(from OG: %pM, via prev OG: %pM, seqno %d, ttvn %u, " - "crc %u, changes %u, td %d, TTL %d, V %d, IDF %d)\n", - ethhdr->h_source, if_incoming->net_dev->name, - if_incoming->net_dev->dev_addr, batman_ogm_packet->orig, - batman_ogm_packet->prev_sender, batman_ogm_packet->seqno, - batman_ogm_packet->ttvn, batman_ogm_packet->tt_crc, - batman_ogm_packet->tt_num_changes, batman_ogm_packet->tq, - batman_ogm_packet->ttl, batman_ogm_packet->version, - has_directlink_flag); - - rcu_read_lock(); - list_for_each_entry_rcu(hard_iface, &hardif_list, list) { - if (hard_iface->if_status != IF_ACTIVE) - continue; - - if (hard_iface->soft_iface != if_incoming->soft_iface) - continue; - - if (compare_eth(ethhdr->h_source, - hard_iface->net_dev->dev_addr)) - is_my_addr = 1; - - if (compare_eth(batman_ogm_packet->orig, - hard_iface->net_dev->dev_addr)) - is_my_orig = 1; - - if (compare_eth(batman_ogm_packet->prev_sender, - hard_iface->net_dev->dev_addr)) - is_my_oldorig = 1; - - if (is_broadcast_ether_addr(ethhdr->h_source)) - is_broadcast = 1; - } - rcu_read_unlock(); - - if (batman_ogm_packet->version != COMPAT_VERSION) { - bat_dbg(DBG_BATMAN, bat_priv, - "Drop packet: incompatible batman version (%i)\n", - batman_ogm_packet->version); - return; - } - - if (is_my_addr) { - bat_dbg(DBG_BATMAN, bat_priv, - "Drop packet: received my own broadcast (sender: %pM" - ")\n", - ethhdr->h_source); - return; - } - - if (is_broadcast) { - bat_dbg(DBG_BATMAN, bat_priv, "Drop packet: " - "ignoring all packets with broadcast source addr (sender: %pM" - ")\n", ethhdr->h_source); - return; - } - - if (is_my_orig) { - unsigned long *word; - int offset; - - orig_neigh_node = get_orig_node(bat_priv, ethhdr->h_source); - if (!orig_neigh_node) - return; - - /* neighbor has to indicate direct link and it has to - * come via the corresponding interface */ - /* save packet seqno for bidirectional check */ - if (has_directlink_flag && - compare_eth(if_incoming->net_dev->dev_addr, - batman_ogm_packet->orig)) { - offset = if_incoming->if_num * NUM_WORDS; - - spin_lock_bh(&orig_neigh_node->ogm_cnt_lock); - word = &(orig_neigh_node->bcast_own[offset]); - bit_mark(word, - if_incoming_seqno - - batman_ogm_packet->seqno - 2); - orig_neigh_node->bcast_own_sum[if_incoming->if_num] = - bit_packet_count(word); - spin_unlock_bh(&orig_neigh_node->ogm_cnt_lock); - } - - bat_dbg(DBG_BATMAN, bat_priv, "Drop packet: " - "originator packet from myself (via neighbor)\n"); - orig_node_free_ref(orig_neigh_node); - return; - } - - if (is_my_oldorig) { - bat_dbg(DBG_BATMAN, bat_priv, - "Drop packet: ignoring all rebroadcast echos (sender: " - "%pM)\n", ethhdr->h_source); - return; - } - - orig_node = get_orig_node(bat_priv, batman_ogm_packet->orig); - if (!orig_node) - return; - - is_duplicate = count_real_packets(ethhdr, batman_ogm_packet, - if_incoming); - - if (is_duplicate == -1) { - bat_dbg(DBG_BATMAN, bat_priv, - "Drop packet: packet within seqno protection time " - "(sender: %pM)\n", ethhdr->h_source); - goto out; - } - - if (batman_ogm_packet->tq == 0) { - bat_dbg(DBG_BATMAN, bat_priv, - "Drop packet: originator packet with tq equal 0\n"); - goto out; - } - - router = orig_node_get_router(orig_node); - if (router) - router_router = orig_node_get_router(router->orig_node); - - /* avoid temporary routing loops */ - if (router && router_router && - (compare_eth(router->addr, batman_ogm_packet->prev_sender)) && - !(compare_eth(batman_ogm_packet->orig, - batman_ogm_packet->prev_sender)) && - (compare_eth(router->addr, router_router->addr))) { - bat_dbg(DBG_BATMAN, bat_priv, - "Drop packet: ignoring all rebroadcast packets that " - "may make me loop (sender: %pM)\n", ethhdr->h_source); - goto out; - } - - /* if sender is a direct neighbor the sender mac equals - * originator mac */ - orig_neigh_node = (is_single_hop_neigh ? - orig_node : - get_orig_node(bat_priv, ethhdr->h_source)); - if (!orig_neigh_node) - goto out; - - orig_neigh_router = orig_node_get_router(orig_neigh_node); - - /* drop packet if sender is not a direct neighbor and if we - * don't route towards it */ - if (!is_single_hop_neigh && (!orig_neigh_router)) { - bat_dbg(DBG_BATMAN, bat_priv, - "Drop packet: OGM via unknown neighbor!\n"); - goto out_neigh; - } - - is_bidirectional = is_bidirectional_neigh(orig_node, orig_neigh_node, - batman_ogm_packet, - if_incoming); - - bonding_save_primary(orig_node, orig_neigh_node, batman_ogm_packet); - - /* update ranking if it is not a duplicate or has the same - * seqno and similar ttl as the non-duplicate */ - if (is_bidirectional && - (!is_duplicate || - ((orig_node->last_real_seqno == batman_ogm_packet->seqno) && - (orig_node->last_ttl - 3 <= batman_ogm_packet->ttl)))) - update_orig(bat_priv, orig_node, ethhdr, batman_ogm_packet, - if_incoming, tt_buff, is_duplicate); - - /* is single hop (direct) neighbor */ - if (is_single_hop_neigh) { - - /* mark direct link on incoming interface */ - schedule_forward_packet(orig_node, ethhdr, batman_ogm_packet, - 1, if_incoming); - - bat_dbg(DBG_BATMAN, bat_priv, "Forwarding packet: " - "rebroadcast neighbor packet with direct link flag\n"); - goto out_neigh; - } - - /* multihop originator */ - if (!is_bidirectional) { - bat_dbg(DBG_BATMAN, bat_priv, - "Drop packet: not received via bidirectional link\n"); - goto out_neigh; - } - - if (is_duplicate) { - bat_dbg(DBG_BATMAN, bat_priv, - "Drop packet: duplicate packet received\n"); - goto out_neigh; - } - - bat_dbg(DBG_BATMAN, bat_priv, - "Forwarding packet: rebroadcast originator packet\n"); - schedule_forward_packet(orig_node, ethhdr, batman_ogm_packet, - 0, if_incoming); - -out_neigh: - if ((orig_neigh_node) && (!is_single_hop_neigh)) - orig_node_free_ref(orig_neigh_node); -out: - if (router) - neigh_node_free_ref(router); - if (router_router) - neigh_node_free_ref(router_router); - if (orig_neigh_router) - neigh_node_free_ref(orig_neigh_router); - - orig_node_free_ref(orig_node); -} - -int recv_bat_packet(struct sk_buff *skb, struct hard_iface *hard_iface) +int recv_bat_ogm_packet(struct sk_buff *skb, struct hard_iface *hard_iface) { struct ethhdr *ethhdr; @@ -845,10 +274,7 @@ int recv_bat_packet(struct sk_buff *skb, struct hard_iface *hard_iface) ethhdr = (struct ethhdr *)skb_mac_header(skb); - receive_aggr_bat_packet(ethhdr, - skb->data, - skb_headlen(skb), - hard_iface); + bat_ogm_receive(ethhdr, skb->data, skb_headlen(skb), hard_iface); kfree_skb(skb); return NET_RX_SUCCESS; diff --git a/net/batman-adv/routing.h b/net/batman-adv/routing.h index 893db7f6007b..7aaee0fb0fdc 100644 --- a/net/batman-adv/routing.h +++ b/net/batman-adv/routing.h @@ -23,19 +23,15 @@ #define _NET_BATMAN_ADV_ROUTING_H_ void slide_own_bcast_window(struct hard_iface *hard_iface); -void receive_bat_packet(const struct ethhdr *ethhdr, - struct batman_ogm_packet *batman_ogm_packet, - const unsigned char *tt_buff, - struct hard_iface *if_incoming); -void update_routes(struct bat_priv *bat_priv, struct orig_node *orig_node, - struct neigh_node *neigh_node); +void update_route(struct bat_priv *bat_priv, struct orig_node *orig_node, + struct neigh_node *neigh_node); int route_unicast_packet(struct sk_buff *skb, struct hard_iface *recv_if); int recv_icmp_packet(struct sk_buff *skb, struct hard_iface *recv_if); int recv_unicast_packet(struct sk_buff *skb, struct hard_iface *recv_if); int recv_ucast_frag_packet(struct sk_buff *skb, struct hard_iface *recv_if); int recv_bcast_packet(struct sk_buff *skb, struct hard_iface *recv_if); int recv_vis_packet(struct sk_buff *skb, struct hard_iface *recv_if); -int recv_bat_packet(struct sk_buff *skb, struct hard_iface *recv_if); +int recv_bat_ogm_packet(struct sk_buff *skb, struct hard_iface *recv_if); int recv_tt_query(struct sk_buff *skb, struct hard_iface *recv_if); int recv_roam_adv(struct sk_buff *skb, struct hard_iface *recv_if); struct neigh_node *find_router(struct bat_priv *bat_priv, @@ -43,5 +39,12 @@ struct neigh_node *find_router(struct bat_priv *bat_priv, const struct hard_iface *recv_if); void bonding_candidate_del(struct orig_node *orig_node, struct neigh_node *neigh_node); +void bonding_candidate_add(struct orig_node *orig_node, + struct neigh_node *neigh_node); +void bonding_save_primary(const struct orig_node *orig_node, + struct orig_node *orig_neigh_node, + const struct batman_ogm_packet *batman_ogm_packet); +int window_protected(struct bat_priv *bat_priv, int32_t seq_num_diff, + unsigned long *last_reset); #endif /* _NET_BATMAN_ADV_ROUTING_H_ */ |