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);