In preparation of the upcoming improved routing algorithm the code based has to be re-organized to allow choosing the routing algorithm at compile time.

Signed-off-by: Marek Lindner lindner_marek@yahoo.de --- Makefile.kbuild | 1 + aggregation.c | 31 --- aggregation.h | 3 - bat_iv_ogm.c | 639 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ bat_ogm.h | 30 +++ hard-interface.c | 2 +- originator.c | 3 +- routing.c | 606 ++------------------------------------------------- routing.h | 17 +- 9 files changed, 698 insertions(+), 634 deletions(-) create mode 100644 bat_iv_ogm.c create mode 100644 bat_ogm.h

diff --git a/Makefile.kbuild b/Makefile.kbuild index 4dda02b..3865d4d 100644 --- a/Makefile.kbuild +++ b/Makefile.kbuild @@ -34,6 +34,7 @@ endif obj-m += 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/aggregation.c b/aggregation.c index f20423f..4716c93 100644 --- a/aggregation.c +++ b/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/aggregation.h b/aggregation.h index 7fc23b0..7a92e4c 100644 --- a/aggregation.h +++ b/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/bat_iv_ogm.c b/bat_iv_ogm.c new file mode 100644 index 0000000..6fa2d46 --- /dev/null +++ b/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/bat_ogm.h b/bat_ogm.h new file mode 100644 index 0000000..bdd3d1e --- /dev/null +++ b/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/hard-interface.c b/hard-interface.c index cf9f4af..cfee017 100644 --- a/hard-interface.c +++ b/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/originator.c b/originator.c index d448018..cd7d256 100644 --- a/originator.c +++ b/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/routing.c b/routing.c index 6efd1d0..f961cc5 100644 --- a/routing.c +++ b/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/routing.h b/routing.h index 893db7f..7aaee0f 100644 --- a/routing.h +++ b/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_ */

Signed-off-by: Marek Lindner lindner_marek@yahoo.de --- bat_iv_ogm.c | 37 +++++++++++++++++++++++++++++++++++++ bat_ogm.h | 3 +++ hard-interface.c | 38 ++++++-------------------------------- 3 files changed, 46 insertions(+), 32 deletions(-)

diff --git a/bat_iv_ogm.c b/bat_iv_ogm.c index 6fa2d46..468bd5e 100644 --- a/bat_iv_ogm.c +++ b/bat_iv_ogm.c @@ -30,6 +30,43 @@ #include "hard-interface.h" #include "send.h"

+void bat_ogm_init(struct hard_iface *hard_iface) +{ + struct batman_ogm_packet *batman_ogm_packet; + + hard_iface->packet_len = BATMAN_OGM_LEN; + hard_iface->packet_buff = kmalloc(hard_iface->packet_len, GFP_ATOMIC); + + batman_ogm_packet = (struct batman_ogm_packet *)hard_iface->packet_buff; + batman_ogm_packet->packet_type = BAT_OGM; + batman_ogm_packet->version = COMPAT_VERSION; + batman_ogm_packet->flags = NO_FLAGS; + batman_ogm_packet->ttl = 2; + batman_ogm_packet->tq = TQ_MAX_VALUE; + batman_ogm_packet->tt_num_changes = 0; + batman_ogm_packet->ttvn = 0; +} + +void bat_ogm_init_primary(struct hard_iface *hard_iface) +{ + struct batman_ogm_packet *batman_ogm_packet; + + batman_ogm_packet = (struct batman_ogm_packet *)hard_iface->packet_buff; + batman_ogm_packet->flags = PRIMARIES_FIRST_HOP; + batman_ogm_packet->ttl = TTL; +} + +void bat_ogm_update_mac(struct hard_iface *hard_iface) +{ + struct batman_ogm_packet *batman_ogm_packet; + + batman_ogm_packet = (struct batman_ogm_packet *)hard_iface->packet_buff; + memcpy(batman_ogm_packet->orig, + hard_iface->net_dev->dev_addr, ETH_ALEN); + memcpy(batman_ogm_packet->prev_sender, + hard_iface->net_dev->dev_addr, ETH_ALEN); +} + /* is there another aggregated packet here? */ static int bat_ogm_aggr_packet(int buff_pos, int packet_len, int tt_num_changes) diff --git a/bat_ogm.h b/bat_ogm.h index bdd3d1e..7809b92 100644 --- a/bat_ogm.h +++ b/bat_ogm.h @@ -24,6 +24,9 @@

#include "main.h"

+void bat_ogm_init(struct hard_iface *hard_iface); +void bat_ogm_init_primary(struct hard_iface *hard_iface); +void bat_ogm_update_mac(struct hard_iface *hard_iface); void bat_ogm_receive(const struct ethhdr *ethhdr, unsigned char *packet_buff, int packet_len, struct hard_iface *if_incoming);

diff --git a/hard-interface.c b/hard-interface.c index cfee017..2a15582 100644 --- a/hard-interface.c +++ b/hard-interface.c @@ -28,6 +28,7 @@ #include "bat_sysfs.h" #include "originator.h" #include "hash.h" +#include "bat_ogm.h"

#include <linux/if_arp.h>

@@ -131,7 +132,6 @@ static void primary_if_select(struct bat_priv *bat_priv, struct hard_iface *new_hard_iface) { struct hard_iface *curr_hard_iface; - struct batman_ogm_packet *batman_ogm_packet;

ASSERT_RTNL();

@@ -147,11 +147,7 @@ static void primary_if_select(struct bat_priv *bat_priv, if (!new_hard_iface) return;

- batman_ogm_packet = (struct batman_ogm_packet *) - (new_hard_iface->packet_buff); - batman_ogm_packet->flags = PRIMARIES_FIRST_HOP; - batman_ogm_packet->ttl = TTL; - + bat_ogm_init_primary(new_hard_iface); primary_if_update_addr(bat_priv); }

@@ -163,17 +159,6 @@ static bool hardif_is_iface_up(const struct hard_iface *hard_iface) return false; }

-static void update_mac_addresses(struct hard_iface *hard_iface) -{ - struct batman_ogm_packet *batman_ogm_packet; - - batman_ogm_packet = (struct batman_ogm_packet *)hard_iface->packet_buff; - memcpy(batman_ogm_packet->orig, - hard_iface->net_dev->dev_addr, ETH_ALEN); - memcpy(batman_ogm_packet->prev_sender, - hard_iface->net_dev->dev_addr, ETH_ALEN); -} - static void check_known_mac_addr(const struct net_device *net_dev) { const struct hard_iface *hard_iface; @@ -248,7 +233,7 @@ static void hardif_activate_interface(struct hard_iface *hard_iface)

bat_priv = netdev_priv(hard_iface->soft_iface);

- update_mac_addresses(hard_iface); + bat_ogm_update_mac(hard_iface); hard_iface->if_status = IF_TO_BE_ACTIVATED;

/** @@ -287,7 +272,6 @@ int hardif_enable_interface(struct hard_iface *hard_iface, const char *iface_name) { struct bat_priv *bat_priv; - struct batman_ogm_packet *batman_ogm_packet; struct net_device *soft_iface; int ret;

@@ -322,8 +306,8 @@ int hardif_enable_interface(struct hard_iface *hard_iface,

hard_iface->soft_iface = soft_iface; bat_priv = netdev_priv(hard_iface->soft_iface); - hard_iface->packet_len = BATMAN_OGM_LEN; - hard_iface->packet_buff = kmalloc(hard_iface->packet_len, GFP_ATOMIC); + + bat_ogm_init(hard_iface);

if (!hard_iface->packet_buff) { bat_err(hard_iface->soft_iface, "Can't add interface packet " @@ -332,16 +316,6 @@ int hardif_enable_interface(struct hard_iface *hard_iface, goto err; }

- batman_ogm_packet = (struct batman_ogm_packet *) - (hard_iface->packet_buff); - batman_ogm_packet->packet_type = BAT_OGM; - batman_ogm_packet->version = COMPAT_VERSION; - batman_ogm_packet->flags = NO_FLAGS; - batman_ogm_packet->ttl = 2; - batman_ogm_packet->tq = TQ_MAX_VALUE; - batman_ogm_packet->tt_num_changes = 0; - batman_ogm_packet->ttvn = 0; - hard_iface->if_num = bat_priv->num_ifaces; bat_priv->num_ifaces++; hard_iface->if_status = IF_INACTIVE; @@ -556,7 +530,7 @@ static int hard_if_event(struct notifier_block *this, goto hardif_put;

check_known_mac_addr(hard_iface->net_dev); - update_mac_addresses(hard_iface); + bat_ogm_update_mac(hard_iface);

bat_priv = netdev_priv(hard_iface->soft_iface); primary_if = primary_if_get_selected(bat_priv);

In the process the batman iv OGM aggregation code could be merged into the batman iv code base which makes the separate aggregation files superfluous.

Signed-off-by: Marek Lindner lindner_marek@yahoo.de --- Makefile.kbuild | 1 - aggregation.c | 266 ----------------------------- aggregation.h | 42 ----- bat_iv_ogm.c | 502 +++++++++++++++++++++++++++++++++++++++++++++++++++++- bat_ogm.h | 2 + hard-interface.c | 2 +- send.c | 297 ++------------------------------ send.h | 9 +- 8 files changed, 522 insertions(+), 599 deletions(-) delete mode 100644 aggregation.c delete mode 100644 aggregation.h

diff --git a/Makefile.kbuild b/Makefile.kbuild index 3865d4d..6377c17 100644 --- a/Makefile.kbuild +++ b/Makefile.kbuild @@ -32,7 +32,6 @@ EXTRA_CFLAGS += -DSOURCE_VERSION="$(REVISION)" endif

obj-m += 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 diff --git a/aggregation.c b/aggregation.c deleted file mode 100644 index 4716c93..0000000 --- a/aggregation.c +++ /dev/null @@ -1,266 +0,0 @@ -/* - * 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 "translation-table.h" -#include "aggregation.h" -#include "send.h" -#include "routing.h" -#include "hard-interface.h" - -/* return true if new_packet can be aggregated with forw_packet */ -static bool can_aggregate_with(const struct batman_ogm_packet - *new_batman_ogm_packet, - struct bat_priv *bat_priv, - int packet_len, - unsigned long send_time, - bool directlink, - const struct hard_iface *if_incoming, - const struct forw_packet *forw_packet) -{ - struct batman_ogm_packet *batman_ogm_packet = - (struct batman_ogm_packet *)forw_packet->skb->data; - int aggregated_bytes = forw_packet->packet_len + packet_len; - struct hard_iface *primary_if = NULL; - bool res = false; - - /** - * we can aggregate the current packet to this aggregated packet - * if: - * - * - the send time is within our MAX_AGGREGATION_MS time - * - the resulting packet wont be bigger than - * MAX_AGGREGATION_BYTES - */ - - if (time_before(send_time, forw_packet->send_time) && - time_after_eq(send_time + msecs_to_jiffies(MAX_AGGREGATION_MS), - forw_packet->send_time) && - (aggregated_bytes <= MAX_AGGREGATION_BYTES)) { - - /** - * check aggregation compatibility - * -> direct link packets are broadcasted on - * their interface only - * -> aggregate packet if the current packet is - * a "global" packet as well as the base - * packet - */ - - primary_if = primary_if_get_selected(bat_priv); - if (!primary_if) - goto out; - - /* packets without direct link flag and high TTL - * are flooded through the net */ - if ((!directlink) && - (!(batman_ogm_packet->flags & DIRECTLINK)) && - (batman_ogm_packet->ttl != 1) && - - /* own packets originating non-primary - * interfaces leave only that interface */ - ((!forw_packet->own) || - (forw_packet->if_incoming == primary_if))) { - res = true; - goto out; - } - - /* if the incoming packet is sent via this one - * interface only - we still can aggregate */ - if ((directlink) && - (new_batman_ogm_packet->ttl == 1) && - (forw_packet->if_incoming == if_incoming) && - - /* packets from direct neighbors or - * own secondary interface packets - * (= secondary interface packets in general) */ - (batman_ogm_packet->flags & DIRECTLINK || - (forw_packet->own && - forw_packet->if_incoming != primary_if))) { - res = true; - goto out; - } - } - -out: - if (primary_if) - hardif_free_ref(primary_if); - return res; -} - -/* create a new aggregated packet and add this packet to it */ -static void new_aggregated_packet(const unsigned char *packet_buff, - int packet_len, unsigned long send_time, - bool direct_link, - struct hard_iface *if_incoming, - int own_packet) -{ - struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface); - struct forw_packet *forw_packet_aggr; - unsigned char *skb_buff; - - if (!atomic_inc_not_zero(&if_incoming->refcount)) - return; - - /* own packet should always be scheduled */ - if (!own_packet) { - if (!atomic_dec_not_zero(&bat_priv->batman_queue_left)) { - bat_dbg(DBG_BATMAN, bat_priv, - "batman packet queue full\n"); - goto out; - } - } - - forw_packet_aggr = kmalloc(sizeof(*forw_packet_aggr), GFP_ATOMIC); - if (!forw_packet_aggr) { - if (!own_packet) - atomic_inc(&bat_priv->batman_queue_left); - goto out; - } - - if ((atomic_read(&bat_priv->aggregated_ogms)) && - (packet_len < MAX_AGGREGATION_BYTES)) - forw_packet_aggr->skb = dev_alloc_skb(MAX_AGGREGATION_BYTES + - sizeof(struct ethhdr)); - else - forw_packet_aggr->skb = dev_alloc_skb(packet_len + - sizeof(struct ethhdr)); - - if (!forw_packet_aggr->skb) { - if (!own_packet) - atomic_inc(&bat_priv->batman_queue_left); - kfree(forw_packet_aggr); - goto out; - } - skb_reserve(forw_packet_aggr->skb, sizeof(struct ethhdr)); - - INIT_HLIST_NODE(&forw_packet_aggr->list); - - skb_buff = skb_put(forw_packet_aggr->skb, packet_len); - forw_packet_aggr->packet_len = packet_len; - memcpy(skb_buff, packet_buff, packet_len); - - forw_packet_aggr->own = own_packet; - forw_packet_aggr->if_incoming = if_incoming; - forw_packet_aggr->num_packets = 0; - forw_packet_aggr->direct_link_flags = NO_FLAGS; - forw_packet_aggr->send_time = send_time; - - /* save packet direct link flag status */ - if (direct_link) - forw_packet_aggr->direct_link_flags |= 1; - - /* add new packet to packet list */ - spin_lock_bh(&bat_priv->forw_bat_list_lock); - hlist_add_head(&forw_packet_aggr->list, &bat_priv->forw_bat_list); - spin_unlock_bh(&bat_priv->forw_bat_list_lock); - - /* start timer for this packet */ - INIT_DELAYED_WORK(&forw_packet_aggr->delayed_work, - send_outstanding_bat_packet); - queue_delayed_work(bat_event_workqueue, - &forw_packet_aggr->delayed_work, - send_time - jiffies); - - return; -out: - hardif_free_ref(if_incoming); -} - -/* aggregate a new packet into the existing aggregation */ -static void aggregate(struct forw_packet *forw_packet_aggr, - const unsigned char *packet_buff, int packet_len, - bool direct_link) -{ - unsigned char *skb_buff; - - skb_buff = skb_put(forw_packet_aggr->skb, packet_len); - memcpy(skb_buff, packet_buff, packet_len); - forw_packet_aggr->packet_len += packet_len; - forw_packet_aggr->num_packets++; - - /* save packet direct link flag status */ - if (direct_link) - forw_packet_aggr->direct_link_flags |= - (1 << forw_packet_aggr->num_packets); -} - -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) -{ - /** - * _aggr -> pointer to the packet we want to aggregate with - * _pos -> pointer to the position in the queue - */ - struct forw_packet *forw_packet_aggr = NULL, *forw_packet_pos = NULL; - struct hlist_node *tmp_node; - struct batman_ogm_packet *batman_ogm_packet; - bool direct_link; - - batman_ogm_packet = (struct batman_ogm_packet *)packet_buff; - direct_link = batman_ogm_packet->flags & DIRECTLINK ? 1 : 0; - - /* find position for the packet in the forward queue */ - spin_lock_bh(&bat_priv->forw_bat_list_lock); - /* own packets are not to be aggregated */ - if ((atomic_read(&bat_priv->aggregated_ogms)) && (!own_packet)) { - hlist_for_each_entry(forw_packet_pos, tmp_node, - &bat_priv->forw_bat_list, list) { - if (can_aggregate_with(batman_ogm_packet, - bat_priv, - packet_len, - send_time, - direct_link, - if_incoming, - forw_packet_pos)) { - forw_packet_aggr = forw_packet_pos; - break; - } - } - } - - /* nothing to aggregate with - either aggregation disabled or no - * suitable aggregation packet found */ - if (!forw_packet_aggr) { - /* the following section can run without the lock */ - spin_unlock_bh(&bat_priv->forw_bat_list_lock); - - /** - * if we could not aggregate this packet with one of the others - * we hold it back for a while, so that it might be aggregated - * later on - */ - if ((!own_packet) && - (atomic_read(&bat_priv->aggregated_ogms))) - send_time += msecs_to_jiffies(MAX_AGGREGATION_MS); - - new_aggregated_packet(packet_buff, packet_len, - send_time, direct_link, - if_incoming, own_packet); - } else { - aggregate(forw_packet_aggr, - packet_buff, packet_len, - direct_link); - spin_unlock_bh(&bat_priv->forw_bat_list_lock); - } -} diff --git a/aggregation.h b/aggregation.h deleted file mode 100644 index 7a92e4c..0000000 --- a/aggregation.h +++ /dev/null @@ -1,42 +0,0 @@ -/* - * 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_AGGREGATION_H_ -#define _NET_BATMAN_ADV_AGGREGATION_H_ - -#include "main.h" - -/* is there another aggregated packet here? */ -static inline int aggregated_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); -} - -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); - -#endif /* _NET_BATMAN_ADV_AGGREGATION_H_ */ diff --git a/bat_iv_ogm.c b/bat_iv_ogm.c index 468bd5e..3512e25 100644 --- a/bat_iv_ogm.c +++ b/bat_iv_ogm.c @@ -67,6 +67,27 @@ void bat_ogm_update_mac(struct hard_iface *hard_iface) hard_iface->net_dev->dev_addr, ETH_ALEN); }

+/* when do we schedule our own ogm to be sent */ +static unsigned long bat_ogm_emit_send_time(const struct bat_priv *bat_priv) +{ + return jiffies + msecs_to_jiffies( + atomic_read(&bat_priv->orig_interval) - + JITTER + (random32() % 2*JITTER)); +} + +/* when do we schedule a ogm packet to be sent */ +static unsigned long bat_ogm_fwd_send_time(void) +{ + return jiffies + msecs_to_jiffies(random32() % (JITTER/2)); +} + +/* apply hop penalty for a normal link */ +static uint8_t hop_penalty(uint8_t tq, const struct bat_priv *bat_priv) +{ + int hop_penalty = atomic_read(&bat_priv->hop_penalty); + return (tq * (TQ_MAX_VALUE - hop_penalty)) / (TQ_MAX_VALUE); +} + /* is there another aggregated packet here? */ static int bat_ogm_aggr_packet(int buff_pos, int packet_len, int tt_num_changes) @@ -77,6 +98,480 @@ static int bat_ogm_aggr_packet(int buff_pos, int packet_len, (next_buff_pos <= MAX_AGGREGATION_BYTES); }

+/* send a batman ogm to a given interface */ +static void bat_ogm_send_to_if(struct forw_packet *forw_packet, + struct hard_iface *hard_iface) +{ + struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface); + char *fwd_str; + uint8_t packet_num; + int16_t buff_pos; + struct batman_ogm_packet *batman_ogm_packet; + struct sk_buff *skb; + + if (hard_iface->if_status != IF_ACTIVE) + return; + + packet_num = 0; + buff_pos = 0; + batman_ogm_packet = (struct batman_ogm_packet *)forw_packet->skb->data; + + /* adjust all flags and log packets */ + while (bat_ogm_aggr_packet(buff_pos, forw_packet->packet_len, + batman_ogm_packet->tt_num_changes)) { + + /* we might have aggregated direct link packets with an + * ordinary base packet */ + if ((forw_packet->direct_link_flags & (1 << packet_num)) && + (forw_packet->if_incoming == hard_iface)) + batman_ogm_packet->flags |= DIRECTLINK; + else + batman_ogm_packet->flags &= ~DIRECTLINK; + + fwd_str = (packet_num > 0 ? "Forwarding" : (forw_packet->own ? + "Sending own" : + "Forwarding")); + bat_dbg(DBG_BATMAN, bat_priv, + "%s %spacket (originator %pM, seqno %d, TQ %d, TTL %d," + " IDF %s, ttvn %d) on interface %s [%pM]\n", + fwd_str, (packet_num > 0 ? "aggregated " : ""), + batman_ogm_packet->orig, + ntohl(batman_ogm_packet->seqno), + batman_ogm_packet->tq, batman_ogm_packet->ttl, + (batman_ogm_packet->flags & DIRECTLINK ? + "on" : "off"), + batman_ogm_packet->ttvn, hard_iface->net_dev->name, + hard_iface->net_dev->dev_addr); + + buff_pos += BATMAN_OGM_LEN + + tt_len(batman_ogm_packet->tt_num_changes); + packet_num++; + batman_ogm_packet = (struct batman_ogm_packet *) + (forw_packet->skb->data + buff_pos); + } + + /* create clone because function is called more than once */ + skb = skb_clone(forw_packet->skb, GFP_ATOMIC); + if (skb) + send_skb_packet(skb, hard_iface, broadcast_addr); +} + +/* send a batman ogm packet */ +void bat_ogm_emit(struct forw_packet *forw_packet) +{ + struct hard_iface *hard_iface; + struct net_device *soft_iface; + struct bat_priv *bat_priv; + struct hard_iface *primary_if = NULL; + struct batman_ogm_packet *batman_ogm_packet; + unsigned char directlink; + + batman_ogm_packet = (struct batman_ogm_packet *) + (forw_packet->skb->data); + directlink = (batman_ogm_packet->flags & DIRECTLINK ? 1 : 0); + + if (!forw_packet->if_incoming) { + pr_err("Error - can't forward packet: incoming iface not " + "specified\n"); + goto out; + } + + soft_iface = forw_packet->if_incoming->soft_iface; + bat_priv = netdev_priv(soft_iface); + + if (forw_packet->if_incoming->if_status != IF_ACTIVE) + goto out; + + primary_if = primary_if_get_selected(bat_priv); + if (!primary_if) + goto out; + + /* multihomed peer assumed */ + /* non-primary OGMs are only broadcasted on their interface */ + if ((directlink && (batman_ogm_packet->ttl == 1)) || + (forw_packet->own && (forw_packet->if_incoming != primary_if))) { + + /* FIXME: what about aggregated packets ? */ + bat_dbg(DBG_BATMAN, bat_priv, + "%s packet (originator %pM, seqno %d, TTL %d) " + "on interface %s [%pM]\n", + (forw_packet->own ? "Sending own" : "Forwarding"), + batman_ogm_packet->orig, + ntohl(batman_ogm_packet->seqno), + batman_ogm_packet->ttl, + forw_packet->if_incoming->net_dev->name, + forw_packet->if_incoming->net_dev->dev_addr); + + /* skb is only used once and than forw_packet is free'd */ + send_skb_packet(forw_packet->skb, forw_packet->if_incoming, + broadcast_addr); + forw_packet->skb = NULL; + + goto out; + } + + /* broadcast on every interface */ + rcu_read_lock(); + list_for_each_entry_rcu(hard_iface, &hardif_list, list) { + if (hard_iface->soft_iface != soft_iface) + continue; + + bat_ogm_send_to_if(forw_packet, hard_iface); + } + rcu_read_unlock(); + +out: + if (primary_if) + hardif_free_ref(primary_if); +} + +/* return true if new_packet can be aggregated with forw_packet */ +static bool bat_ogm_can_aggregate(const struct batman_ogm_packet + *new_batman_ogm_packet, + struct bat_priv *bat_priv, + int packet_len, unsigned long send_time, + bool directlink, + const struct hard_iface *if_incoming, + const struct forw_packet *forw_packet) +{ + struct batman_ogm_packet *batman_ogm_packet; + int aggregated_bytes = forw_packet->packet_len + packet_len; + struct hard_iface *primary_if = NULL; + bool res = false; + + batman_ogm_packet = (struct batman_ogm_packet *)forw_packet->skb->data; + + /** + * we can aggregate the current packet to this aggregated packet + * if: + * + * - the send time is within our MAX_AGGREGATION_MS time + * - the resulting packet wont be bigger than + * MAX_AGGREGATION_BYTES + */ + + if (time_before(send_time, forw_packet->send_time) && + time_after_eq(send_time + msecs_to_jiffies(MAX_AGGREGATION_MS), + forw_packet->send_time) && + (aggregated_bytes <= MAX_AGGREGATION_BYTES)) { + + /** + * check aggregation compatibility + * -> direct link packets are broadcasted on + * their interface only + * -> aggregate packet if the current packet is + * a "global" packet as well as the base + * packet + */ + + primary_if = primary_if_get_selected(bat_priv); + if (!primary_if) + goto out; + + /* packets without direct link flag and high TTL + * are flooded through the net */ + if ((!directlink) && + (!(batman_ogm_packet->flags & DIRECTLINK)) && + (batman_ogm_packet->ttl != 1) && + + /* own packets originating non-primary + * interfaces leave only that interface */ + ((!forw_packet->own) || + (forw_packet->if_incoming == primary_if))) { + res = true; + goto out; + } + + /* if the incoming packet is sent via this one + * interface only - we still can aggregate */ + if ((directlink) && + (new_batman_ogm_packet->ttl == 1) && + (forw_packet->if_incoming == if_incoming) && + + /* packets from direct neighbors or + * own secondary interface packets + * (= secondary interface packets in general) */ + (batman_ogm_packet->flags & DIRECTLINK || + (forw_packet->own && + forw_packet->if_incoming != primary_if))) { + res = true; + goto out; + } + } + +out: + if (primary_if) + hardif_free_ref(primary_if); + return res; +} + +/* create a new aggregated packet and add this packet to it */ +static void bat_ogm_aggregate_new(const unsigned char *packet_buff, + int packet_len, unsigned long send_time, + bool direct_link, + struct hard_iface *if_incoming, + int own_packet) +{ + struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface); + struct forw_packet *forw_packet_aggr; + unsigned char *skb_buff; + + if (!atomic_inc_not_zero(&if_incoming->refcount)) + return; + + /* own packet should always be scheduled */ + if (!own_packet) { + if (!atomic_dec_not_zero(&bat_priv->batman_queue_left)) { + bat_dbg(DBG_BATMAN, bat_priv, + "batman packet queue full\n"); + goto out; + } + } + + forw_packet_aggr = kmalloc(sizeof(*forw_packet_aggr), GFP_ATOMIC); + if (!forw_packet_aggr) { + if (!own_packet) + atomic_inc(&bat_priv->batman_queue_left); + goto out; + } + + if ((atomic_read(&bat_priv->aggregated_ogms)) && + (packet_len < MAX_AGGREGATION_BYTES)) + forw_packet_aggr->skb = dev_alloc_skb(MAX_AGGREGATION_BYTES + + sizeof(struct ethhdr)); + else + forw_packet_aggr->skb = dev_alloc_skb(packet_len + + sizeof(struct ethhdr)); + + if (!forw_packet_aggr->skb) { + if (!own_packet) + atomic_inc(&bat_priv->batman_queue_left); + kfree(forw_packet_aggr); + goto out; + } + skb_reserve(forw_packet_aggr->skb, sizeof(struct ethhdr)); + + INIT_HLIST_NODE(&forw_packet_aggr->list); + + skb_buff = skb_put(forw_packet_aggr->skb, packet_len); + forw_packet_aggr->packet_len = packet_len; + memcpy(skb_buff, packet_buff, packet_len); + + forw_packet_aggr->own = own_packet; + forw_packet_aggr->if_incoming = if_incoming; + forw_packet_aggr->num_packets = 0; + forw_packet_aggr->direct_link_flags = NO_FLAGS; + forw_packet_aggr->send_time = send_time; + + /* save packet direct link flag status */ + if (direct_link) + forw_packet_aggr->direct_link_flags |= 1; + + /* add new packet to packet list */ + spin_lock_bh(&bat_priv->forw_bat_list_lock); + hlist_add_head(&forw_packet_aggr->list, &bat_priv->forw_bat_list); + spin_unlock_bh(&bat_priv->forw_bat_list_lock); + + /* start timer for this packet */ + INIT_DELAYED_WORK(&forw_packet_aggr->delayed_work, + send_outstanding_bat_ogm_packet); + queue_delayed_work(bat_event_workqueue, + &forw_packet_aggr->delayed_work, + send_time - jiffies); + + return; +out: + hardif_free_ref(if_incoming); +} + +/* aggregate a new packet into the existing ogm packet */ +static void bat_ogm_aggregate(struct forw_packet *forw_packet_aggr, + const unsigned char *packet_buff, + int packet_len, bool direct_link) +{ + unsigned char *skb_buff; + + skb_buff = skb_put(forw_packet_aggr->skb, packet_len); + memcpy(skb_buff, packet_buff, packet_len); + forw_packet_aggr->packet_len += packet_len; + forw_packet_aggr->num_packets++; + + /* save packet direct link flag status */ + if (direct_link) + forw_packet_aggr->direct_link_flags |= + (1 << forw_packet_aggr->num_packets); +} + +static void bat_ogm_queue_add(struct bat_priv *bat_priv, + unsigned char *packet_buff, + int packet_len, struct hard_iface *if_incoming, + int own_packet, unsigned long send_time) +{ + /** + * _aggr -> pointer to the packet we want to aggregate with + * _pos -> pointer to the position in the queue + */ + struct forw_packet *forw_packet_aggr = NULL, *forw_packet_pos = NULL; + struct hlist_node *tmp_node; + struct batman_ogm_packet *batman_ogm_packet; + bool direct_link; + + batman_ogm_packet = (struct batman_ogm_packet *)packet_buff; + direct_link = batman_ogm_packet->flags & DIRECTLINK ? 1 : 0; + + /* find position for the packet in the forward queue */ + spin_lock_bh(&bat_priv->forw_bat_list_lock); + /* own packets are not to be aggregated */ + if ((atomic_read(&bat_priv->aggregated_ogms)) && (!own_packet)) { + hlist_for_each_entry(forw_packet_pos, tmp_node, + &bat_priv->forw_bat_list, list) { + if (bat_ogm_can_aggregate(batman_ogm_packet, + bat_priv, packet_len, + send_time, direct_link, + if_incoming, + forw_packet_pos)) { + forw_packet_aggr = forw_packet_pos; + break; + } + } + } + + /* nothing to aggregate with - either aggregation disabled or no + * suitable aggregation packet found */ + if (!forw_packet_aggr) { + /* the following section can run without the lock */ + spin_unlock_bh(&bat_priv->forw_bat_list_lock); + + /** + * if we could not aggregate this packet with one of the others + * we hold it back for a while, so that it might be aggregated + * later on + */ + if ((!own_packet) && + (atomic_read(&bat_priv->aggregated_ogms))) + send_time += msecs_to_jiffies(MAX_AGGREGATION_MS); + + bat_ogm_aggregate_new(packet_buff, packet_len, + send_time, direct_link, + if_incoming, own_packet); + } else { + bat_ogm_aggregate(forw_packet_aggr, packet_buff, packet_len, + direct_link); + spin_unlock_bh(&bat_priv->forw_bat_list_lock); + } +} + +static void bat_ogm_forward(struct orig_node *orig_node, + const struct ethhdr *ethhdr, + struct batman_ogm_packet *batman_ogm_packet, + int directlink, struct hard_iface *if_incoming) +{ + struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface); + struct neigh_node *router; + uint8_t in_tq, in_ttl, tq_avg = 0; + uint8_t tt_num_changes; + + if (batman_ogm_packet->ttl <= 1) { + bat_dbg(DBG_BATMAN, bat_priv, "ttl exceeded\n"); + return; + } + + router = orig_node_get_router(orig_node); + + in_tq = batman_ogm_packet->tq; + in_ttl = batman_ogm_packet->ttl; + tt_num_changes = batman_ogm_packet->tt_num_changes; + + batman_ogm_packet->ttl--; + memcpy(batman_ogm_packet->prev_sender, ethhdr->h_source, ETH_ALEN); + + /* rebroadcast tq of our best ranking neighbor to ensure the rebroadcast + * of our best tq value */ + if (router && router->tq_avg != 0) { + + /* rebroadcast ogm of best ranking neighbor as is */ + if (!compare_eth(router->addr, ethhdr->h_source)) { + batman_ogm_packet->tq = router->tq_avg; + + if (router->last_ttl) + batman_ogm_packet->ttl = router->last_ttl - 1; + } + + tq_avg = router->tq_avg; + } + + if (router) + neigh_node_free_ref(router); + + /* apply hop penalty */ + batman_ogm_packet->tq = hop_penalty(batman_ogm_packet->tq, bat_priv); + + bat_dbg(DBG_BATMAN, bat_priv, + "Forwarding packet: tq_orig: %i, tq_avg: %i, " + "tq_forw: %i, ttl_orig: %i, ttl_forw: %i\n", + in_tq, tq_avg, batman_ogm_packet->tq, in_ttl - 1, + batman_ogm_packet->ttl); + + batman_ogm_packet->seqno = htonl(batman_ogm_packet->seqno); + batman_ogm_packet->tt_crc = htons(batman_ogm_packet->tt_crc); + + /* switch of primaries first hop flag when forwarding */ + batman_ogm_packet->flags &= ~PRIMARIES_FIRST_HOP; + if (directlink) + batman_ogm_packet->flags |= DIRECTLINK; + else + batman_ogm_packet->flags &= ~DIRECTLINK; + + bat_ogm_queue_add(bat_priv, (unsigned char *)batman_ogm_packet, + BATMAN_OGM_LEN + tt_len(tt_num_changes), + if_incoming, 0, bat_ogm_fwd_send_time()); +} + +void bat_ogm_schedule(struct hard_iface *hard_iface, int tt_num_changes) +{ + struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface); + struct batman_ogm_packet *batman_ogm_packet; + struct hard_iface *primary_if; + int vis_server; + + vis_server = atomic_read(&bat_priv->vis_mode); + primary_if = primary_if_get_selected(bat_priv); + + batman_ogm_packet = (struct batman_ogm_packet *)hard_iface->packet_buff; + + /* change sequence number to network order */ + batman_ogm_packet->seqno = + htonl((uint32_t)atomic_read(&hard_iface->seqno)); + + batman_ogm_packet->ttvn = atomic_read(&bat_priv->ttvn); + batman_ogm_packet->tt_crc = htons((uint16_t) + atomic_read(&bat_priv->tt_crc)); + if (tt_num_changes >= 0) + batman_ogm_packet->tt_num_changes = tt_num_changes; + + if (vis_server == VIS_TYPE_SERVER_SYNC) + batman_ogm_packet->flags |= VIS_SERVER; + else + batman_ogm_packet->flags &= ~VIS_SERVER; + + if ((hard_iface == primary_if) && + (atomic_read(&bat_priv->gw_mode) == GW_MODE_SERVER)) + batman_ogm_packet->gw_flags = + (uint8_t)atomic_read(&bat_priv->gw_bandwidth); + else + batman_ogm_packet->gw_flags = NO_FLAGS; + + atomic_inc(&hard_iface->seqno); + + slide_own_bcast_window(hard_iface); + bat_ogm_queue_add(bat_priv, hard_iface->packet_buff, + hard_iface->packet_len, hard_iface, 1, + bat_ogm_emit_send_time(bat_priv)); + + if (primary_if) + hardif_free_ref(primary_if); +} + static void bat_ogm_orig_update(struct bat_priv *bat_priv, struct orig_node *orig_node, const struct ethhdr *ethhdr, @@ -605,8 +1100,8 @@ static void bat_ogm_process(const struct ethhdr *ethhdr, if (is_single_hop_neigh) {

/* mark direct link on incoming interface */ - schedule_forward_packet(orig_node, ethhdr, batman_ogm_packet, - 1, if_incoming); + bat_ogm_forward(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"); @@ -628,8 +1123,7 @@ static void bat_ogm_process(const struct ethhdr *ethhdr,

bat_dbg(DBG_BATMAN, bat_priv, "Forwarding packet: rebroadcast originator packet\n"); - schedule_forward_packet(orig_node, ethhdr, batman_ogm_packet, - 0, if_incoming); + bat_ogm_forward(orig_node, ethhdr, batman_ogm_packet, 0, if_incoming);

out_neigh: if ((orig_neigh_node) && (!is_single_hop_neigh)) diff --git a/bat_ogm.h b/bat_ogm.h index 7809b92..69329c1 100644 --- a/bat_ogm.h +++ b/bat_ogm.h @@ -27,6 +27,8 @@ void bat_ogm_init(struct hard_iface *hard_iface); void bat_ogm_init_primary(struct hard_iface *hard_iface); void bat_ogm_update_mac(struct hard_iface *hard_iface); +void bat_ogm_schedule(struct hard_iface *hard_iface, int tt_num_changes); +void bat_ogm_emit(struct forw_packet *forw_packet); void bat_ogm_receive(const struct ethhdr *ethhdr, unsigned char *packet_buff, int packet_len, struct hard_iface *if_incoming);

diff --git a/hard-interface.c b/hard-interface.c index 2a15582..0cc0f04 100644 --- a/hard-interface.c +++ b/hard-interface.c @@ -360,7 +360,7 @@ int hardif_enable_interface(struct hard_iface *hard_iface, hard_iface->net_dev->name);

/* begin scheduling originator messages on that interface */ - schedule_own_packet(hard_iface); + schedule_bat_ogm(hard_iface);

out: return 0; diff --git a/send.c b/send.c index 40a5fcd..8a684eb 100644 --- a/send.c +++ b/send.c @@ -26,33 +26,12 @@ #include "soft-interface.h" #include "hard-interface.h" #include "vis.h" -#include "aggregation.h" #include "gateway_common.h" #include "originator.h" +#include "bat_ogm.h"

static void send_outstanding_bcast_packet(struct work_struct *work);

-/* apply hop penalty for a normal link */ -static uint8_t hop_penalty(uint8_t tq, const struct bat_priv *bat_priv) -{ - int hop_penalty = atomic_read(&bat_priv->hop_penalty); - return (tq * (TQ_MAX_VALUE - hop_penalty)) / (TQ_MAX_VALUE); -} - -/* when do we schedule our own packet to be sent */ -static unsigned long own_send_time(const struct bat_priv *bat_priv) -{ - return jiffies + msecs_to_jiffies( - atomic_read(&bat_priv->orig_interval) - - JITTER + (random32() % 2*JITTER)); -} - -/* when do we schedule a forwarded packet to be sent */ -static unsigned long forward_send_time(void) -{ - return jiffies + msecs_to_jiffies(random32() % (JITTER/2)); -} - /* send out an already prepared packet to the given address via the * specified batman interface */ int send_skb_packet(struct sk_buff *skb, struct hard_iface *hard_iface, @@ -99,133 +78,6 @@ send_skb_err: return NET_XMIT_DROP; }

-/* Send a packet to a given interface */ -static void send_packet_to_if(struct forw_packet *forw_packet, - struct hard_iface *hard_iface) -{ - struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface); - char *fwd_str; - uint8_t packet_num; - int16_t buff_pos; - struct batman_ogm_packet *batman_ogm_packet; - struct sk_buff *skb; - - if (hard_iface->if_status != IF_ACTIVE) - return; - - packet_num = 0; - buff_pos = 0; - batman_ogm_packet = (struct batman_ogm_packet *)forw_packet->skb->data; - - /* adjust all flags and log packets */ - while (aggregated_packet(buff_pos, - forw_packet->packet_len, - batman_ogm_packet->tt_num_changes)) { - - /* we might have aggregated direct link packets with an - * ordinary base packet */ - if ((forw_packet->direct_link_flags & (1 << packet_num)) && - (forw_packet->if_incoming == hard_iface)) - batman_ogm_packet->flags |= DIRECTLINK; - else - batman_ogm_packet->flags &= ~DIRECTLINK; - - fwd_str = (packet_num > 0 ? "Forwarding" : (forw_packet->own ? - "Sending own" : - "Forwarding")); - bat_dbg(DBG_BATMAN, bat_priv, - "%s %spacket (originator %pM, seqno %d, TQ %d, TTL %d," - " IDF %s, ttvn %d) on interface %s [%pM]\n", - fwd_str, (packet_num > 0 ? "aggregated " : ""), - batman_ogm_packet->orig, - ntohl(batman_ogm_packet->seqno), - batman_ogm_packet->tq, batman_ogm_packet->ttl, - (batman_ogm_packet->flags & DIRECTLINK ? - "on" : "off"), - batman_ogm_packet->ttvn, hard_iface->net_dev->name, - hard_iface->net_dev->dev_addr); - - buff_pos += BATMAN_OGM_LEN + - tt_len(batman_ogm_packet->tt_num_changes); - packet_num++; - batman_ogm_packet = (struct batman_ogm_packet *) - (forw_packet->skb->data + buff_pos); - } - - /* create clone because function is called more than once */ - skb = skb_clone(forw_packet->skb, GFP_ATOMIC); - if (skb) - send_skb_packet(skb, hard_iface, broadcast_addr); -} - -/* send a batman packet */ -static void send_packet(struct forw_packet *forw_packet) -{ - struct hard_iface *hard_iface; - struct net_device *soft_iface; - struct bat_priv *bat_priv; - struct hard_iface *primary_if = NULL; - struct batman_ogm_packet *batman_ogm_packet = - (struct batman_ogm_packet *)(forw_packet->skb->data); - unsigned char directlink; - - directlink = (batman_ogm_packet->flags & DIRECTLINK ? 1 : 0); - - if (!forw_packet->if_incoming) { - pr_err("Error - can't forward packet: incoming iface not " - "specified\n"); - goto out; - } - - soft_iface = forw_packet->if_incoming->soft_iface; - bat_priv = netdev_priv(soft_iface); - - if (forw_packet->if_incoming->if_status != IF_ACTIVE) - goto out; - - primary_if = primary_if_get_selected(bat_priv); - if (!primary_if) - goto out; - - /* multihomed peer assumed */ - /* non-primary OGMs are only broadcasted on their interface */ - if ((directlink && (batman_ogm_packet->ttl == 1)) || - (forw_packet->own && (forw_packet->if_incoming != primary_if))) { - - /* FIXME: what about aggregated packets ? */ - bat_dbg(DBG_BATMAN, bat_priv, - "%s packet (originator %pM, seqno %d, TTL %d) " - "on interface %s [%pM]\n", - (forw_packet->own ? "Sending own" : "Forwarding"), - batman_ogm_packet->orig, - ntohl(batman_ogm_packet->seqno), - batman_ogm_packet->ttl, - forw_packet->if_incoming->net_dev->name, - forw_packet->if_incoming->net_dev->dev_addr); - - /* skb is only used once and than forw_packet is free'd */ - send_skb_packet(forw_packet->skb, forw_packet->if_incoming, - broadcast_addr); - forw_packet->skb = NULL; - - goto out; - } - - /* broadcast on every interface */ - rcu_read_lock(); - list_for_each_entry_rcu(hard_iface, &hardif_list, list) { - if (hard_iface->soft_iface != soft_iface) - continue; - - send_packet_to_if(forw_packet, hard_iface); - } - rcu_read_unlock(); - -out: - if (primary_if) - hardif_free_ref(primary_if); -} - static void realloc_packet_buffer(struct hard_iface *hard_iface, int new_len) { @@ -245,11 +97,10 @@ static void realloc_packet_buffer(struct hard_iface *hard_iface, }

/* when calling this function (hard_iface == primary_if) has to be true */ -static void prepare_packet_buffer(struct bat_priv *bat_priv, +static int prepare_packet_buffer(struct bat_priv *bat_priv, struct hard_iface *hard_iface) { int new_len; - struct batman_ogm_packet *batman_ogm_packet;

new_len = BATMAN_OGM_LEN + tt_len((uint8_t)atomic_read(&bat_priv->tt_local_changes)); @@ -260,45 +111,34 @@ static void prepare_packet_buffer(struct bat_priv *bat_priv, new_len = BATMAN_OGM_LEN;

realloc_packet_buffer(hard_iface, new_len); - batman_ogm_packet = (struct batman_ogm_packet *)hard_iface->packet_buff;

atomic_set(&bat_priv->tt_crc, tt_local_crc(bat_priv));

/* reset the sending counter */ atomic_set(&bat_priv->tt_ogm_append_cnt, TT_OGM_APPEND_MAX);

- batman_ogm_packet->tt_num_changes = tt_changes_fill_buffer(bat_priv, - hard_iface->packet_buff + BATMAN_OGM_LEN, - hard_iface->packet_len - BATMAN_OGM_LEN); - + return tt_changes_fill_buffer(bat_priv, + hard_iface->packet_buff + BATMAN_OGM_LEN, + hard_iface->packet_len - BATMAN_OGM_LEN); }

-static void reset_packet_buffer(struct bat_priv *bat_priv, +static int reset_packet_buffer(struct bat_priv *bat_priv, struct hard_iface *hard_iface) { - struct batman_ogm_packet *batman_ogm_packet; - realloc_packet_buffer(hard_iface, BATMAN_OGM_LEN); - - batman_ogm_packet = (struct batman_ogm_packet *)hard_iface->packet_buff; - batman_ogm_packet->tt_num_changes = 0; + return 0; }

-void schedule_own_packet(struct hard_iface *hard_iface) +void schedule_bat_ogm(struct hard_iface *hard_iface) { struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface); struct hard_iface *primary_if; - unsigned long send_time; - struct batman_ogm_packet *batman_ogm_packet; - int vis_server; + int tt_num_changes = -1;

if ((hard_iface->if_status == IF_NOT_IN_USE) || (hard_iface->if_status == IF_TO_BE_REMOVED)) return;

- vis_server = atomic_read(&bat_priv->vis_mode); - primary_if = primary_if_get_selected(bat_priv); - /** * the interface gets activated here to avoid race conditions between * the moment of activating the interface in @@ -309,125 +149,26 @@ void schedule_own_packet(struct hard_iface *hard_iface) if (hard_iface->if_status == IF_TO_BE_ACTIVATED) hard_iface->if_status = IF_ACTIVE;

+ primary_if = primary_if_get_selected(bat_priv); + if (hard_iface == primary_if) { /* if at least one change happened */ if (atomic_read(&bat_priv->tt_local_changes) > 0) { tt_commit_changes(bat_priv); - prepare_packet_buffer(bat_priv, hard_iface); + tt_num_changes = prepare_packet_buffer(bat_priv, + hard_iface); }

/* if the changes have been sent often enough */ if (!atomic_dec_not_zero(&bat_priv->tt_ogm_append_cnt)) - reset_packet_buffer(bat_priv, hard_iface); + tt_num_changes = reset_packet_buffer(bat_priv, + hard_iface); }

- /** - * NOTE: packet_buff might just have been re-allocated in - * prepare_packet_buffer() or in reset_packet_buffer() - */ - batman_ogm_packet = (struct batman_ogm_packet *)hard_iface->packet_buff; - - /* change sequence number to network order */ - batman_ogm_packet->seqno = - htonl((uint32_t)atomic_read(&hard_iface->seqno)); - - batman_ogm_packet->ttvn = atomic_read(&bat_priv->ttvn); - batman_ogm_packet->tt_crc = htons((uint16_t) - atomic_read(&bat_priv->tt_crc)); - - if (vis_server == VIS_TYPE_SERVER_SYNC) - batman_ogm_packet->flags |= VIS_SERVER; - else - batman_ogm_packet->flags &= ~VIS_SERVER; - - if ((hard_iface == primary_if) && - (atomic_read(&bat_priv->gw_mode) == GW_MODE_SERVER)) - batman_ogm_packet->gw_flags = - (uint8_t)atomic_read(&bat_priv->gw_bandwidth); - else - batman_ogm_packet->gw_flags = NO_FLAGS; - - atomic_inc(&hard_iface->seqno); - - slide_own_bcast_window(hard_iface); - send_time = own_send_time(bat_priv); - add_bat_packet_to_list(bat_priv, - hard_iface->packet_buff, - hard_iface->packet_len, - hard_iface, 1, send_time); - if (primary_if) hardif_free_ref(primary_if); -}

-void schedule_forward_packet(struct orig_node *orig_node, - const struct ethhdr *ethhdr, - struct batman_ogm_packet *batman_ogm_packet, - int directlink, - struct hard_iface *if_incoming) -{ - struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface); - struct neigh_node *router; - uint8_t in_tq, in_ttl, tq_avg = 0; - unsigned long send_time; - uint8_t tt_num_changes; - - if (batman_ogm_packet->ttl <= 1) { - bat_dbg(DBG_BATMAN, bat_priv, "ttl exceeded\n"); - return; - } - - router = orig_node_get_router(orig_node); - - in_tq = batman_ogm_packet->tq; - in_ttl = batman_ogm_packet->ttl; - tt_num_changes = batman_ogm_packet->tt_num_changes; - - batman_ogm_packet->ttl--; - memcpy(batman_ogm_packet->prev_sender, ethhdr->h_source, ETH_ALEN); - - /* rebroadcast tq of our best ranking neighbor to ensure the rebroadcast - * of our best tq value */ - if (router && router->tq_avg != 0) { - - /* rebroadcast ogm of best ranking neighbor as is */ - if (!compare_eth(router->addr, ethhdr->h_source)) { - batman_ogm_packet->tq = router->tq_avg; - - if (router->last_ttl) - batman_ogm_packet->ttl = router->last_ttl - 1; - } - - tq_avg = router->tq_avg; - } - - if (router) - neigh_node_free_ref(router); - - /* apply hop penalty */ - batman_ogm_packet->tq = hop_penalty(batman_ogm_packet->tq, bat_priv); - - bat_dbg(DBG_BATMAN, bat_priv, - "Forwarding packet: tq_orig: %i, tq_avg: %i, " - "tq_forw: %i, ttl_orig: %i, ttl_forw: %i\n", - in_tq, tq_avg, batman_ogm_packet->tq, in_ttl - 1, - batman_ogm_packet->ttl); - - batman_ogm_packet->seqno = htonl(batman_ogm_packet->seqno); - batman_ogm_packet->tt_crc = htons(batman_ogm_packet->tt_crc); - - /* switch of primaries first hop flag when forwarding */ - batman_ogm_packet->flags &= ~PRIMARIES_FIRST_HOP; - if (directlink) - batman_ogm_packet->flags |= DIRECTLINK; - else - batman_ogm_packet->flags &= ~DIRECTLINK; - - send_time = forward_send_time(); - add_bat_packet_to_list(bat_priv, - (unsigned char *)batman_ogm_packet, - BATMAN_OGM_LEN + tt_len(tt_num_changes), - if_incoming, 0, send_time); + bat_ogm_schedule(hard_iface, tt_num_changes); }

static void forw_packet_free(struct forw_packet *forw_packet) @@ -561,7 +302,7 @@ out: atomic_inc(&bat_priv->bcast_queue_left); }

-void send_outstanding_bat_packet(struct work_struct *work) +void send_outstanding_bat_ogm_packet(struct work_struct *work) { struct delayed_work *delayed_work = container_of(work, struct delayed_work, work); @@ -577,7 +318,7 @@ void send_outstanding_bat_packet(struct work_struct *work) if (atomic_read(&bat_priv->mesh_state) == MESH_DEACTIVATING) goto out;

- send_packet(forw_packet); + bat_ogm_emit(forw_packet);

/** * we have to have at least one packet in the queue @@ -585,7 +326,7 @@ void send_outstanding_bat_packet(struct work_struct *work) * shutting down */ if (forw_packet->own) - schedule_own_packet(forw_packet->if_incoming); + schedule_bat_ogm(forw_packet->if_incoming);

out: /* don't count own packet */ diff --git a/send.h b/send.h index 8a22d84..c8ca3ef 100644 --- a/send.h +++ b/send.h @@ -24,15 +24,10 @@

int send_skb_packet(struct sk_buff *skb, struct hard_iface *hard_iface, const uint8_t *dst_addr); -void schedule_own_packet(struct hard_iface *hard_iface); -void schedule_forward_packet(struct orig_node *orig_node, - const struct ethhdr *ethhdr, - struct batman_ogm_packet *batman_ogm_packet, - int directlink, - struct hard_iface *if_outgoing); +void schedule_bat_ogm(struct hard_iface *hard_iface); int add_bcast_packet_to_list(struct bat_priv *bat_priv, const struct sk_buff *skb, unsigned long delay); -void send_outstanding_bat_packet(struct work_struct *work); +void send_outstanding_bat_ogm_packet(struct work_struct *work); void purge_outstanding_packets(struct bat_priv *bat_priv, const struct hard_iface *hard_iface);