diff options
Diffstat (limited to 'net/batman-adv/send.c')
-rw-r--r-- | net/batman-adv/send.c | 305 |
1 files changed, 25 insertions, 280 deletions
diff --git a/net/batman-adv/send.c b/net/batman-adv/send.c index 57ae809..8a684eb 100644 --- a/net/batman-adv/send.c +++ b/net/batman-adv/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, @@ -99,141 +78,17 @@ 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_packet *batman_packet; - struct sk_buff *skb; - - if (hard_iface->if_status != IF_ACTIVE) - return; - - packet_num = 0; - buff_pos = 0; - batman_packet = (struct batman_packet *)forw_packet->skb->data; - - /* adjust all flags and log packets */ - while (aggregated_packet(buff_pos, - forw_packet->packet_len, - batman_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_packet->flags |= DIRECTLINK; - else - batman_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_packet->orig, ntohl(batman_packet->seqno), - batman_packet->tq, batman_packet->ttl, - (batman_packet->flags & DIRECTLINK ? - "on" : "off"), - batman_packet->ttvn, hard_iface->net_dev->name, - hard_iface->net_dev->dev_addr); - - buff_pos += sizeof(*batman_packet) + - tt_len(batman_packet->tt_num_changes); - packet_num++; - batman_packet = (struct batman_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_packet *batman_packet = - (struct batman_packet *)(forw_packet->skb->data); - int directlink = (batman_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_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_packet->orig, ntohl(batman_packet->seqno), - batman_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) + int new_len) { unsigned char *new_buff; - struct batman_packet *batman_packet; new_buff = kmalloc(new_len, GFP_ATOMIC); /* keep old buffer if kmalloc should fail */ if (new_buff) { memcpy(new_buff, hard_iface->packet_buff, - sizeof(*batman_packet)); + BATMAN_OGM_LEN); kfree(hard_iface->packet_buff); hard_iface->packet_buff = new_buff; @@ -242,60 +97,48 @@ 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_packet *batman_packet; - new_len = BAT_PACKET_LEN + + new_len = BATMAN_OGM_LEN + tt_len((uint8_t)atomic_read(&bat_priv->tt_local_changes)); /* if we have too many changes for one packet don't send any * and wait for the tt table request which will be fragmented */ if (new_len > hard_iface->soft_iface->mtu) - new_len = BAT_PACKET_LEN; + new_len = BATMAN_OGM_LEN; realloc_packet_buffer(hard_iface, new_len); - batman_packet = (struct batman_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_packet->tt_num_changes = tt_changes_fill_buffer(bat_priv, - hard_iface->packet_buff + BAT_PACKET_LEN, - hard_iface->packet_len - BAT_PACKET_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, - struct hard_iface *hard_iface) +static int reset_packet_buffer(struct bat_priv *bat_priv, + struct hard_iface *hard_iface) { - struct batman_packet *batman_packet; - - realloc_packet_buffer(hard_iface, BAT_PACKET_LEN); - - batman_packet = (struct batman_packet *)hard_iface->packet_buff; - batman_packet->tt_num_changes = 0; + realloc_packet_buffer(hard_iface, BATMAN_OGM_LEN); + 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_packet *batman_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 @@ -306,124 +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_packet = (struct batman_packet *)hard_iface->packet_buff; - - /* change sequence number to network order */ - batman_packet->seqno = - htonl((uint32_t)atomic_read(&hard_iface->seqno)); - - batman_packet->ttvn = atomic_read(&bat_priv->ttvn); - batman_packet->tt_crc = htons((uint16_t)atomic_read(&bat_priv->tt_crc)); - - if (vis_server == VIS_TYPE_SERVER_SYNC) - batman_packet->flags |= VIS_SERVER; - else - batman_packet->flags &= ~VIS_SERVER; - - if ((hard_iface == primary_if) && - (atomic_read(&bat_priv->gw_mode) == GW_MODE_SERVER)) - batman_packet->gw_flags = - (uint8_t)atomic_read(&bat_priv->gw_bandwidth); - else - batman_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_packet *batman_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_packet->ttl <= 1) { - bat_dbg(DBG_BATMAN, bat_priv, "ttl exceeded\n"); - return; - } - - router = orig_node_get_router(orig_node); - - in_tq = batman_packet->tq; - in_ttl = batman_packet->ttl; - tt_num_changes = batman_packet->tt_num_changes; - - batman_packet->ttl--; - memcpy(batman_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_packet->tq = router->tq_avg; - - if (router->last_ttl) - batman_packet->ttl = router->last_ttl - 1; - } - - tq_avg = router->tq_avg; - } - - if (router) - neigh_node_free_ref(router); - - /* apply hop penalty */ - batman_packet->tq = hop_penalty(batman_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_packet->tq, in_ttl - 1, - batman_packet->ttl); - - batman_packet->seqno = htonl(batman_packet->seqno); - batman_packet->tt_crc = htons(batman_packet->tt_crc); - - /* switch of primaries first hop flag when forwarding */ - batman_packet->flags &= ~PRIMARIES_FIRST_HOP; - if (directlink) - batman_packet->flags |= DIRECTLINK; - else - batman_packet->flags &= ~DIRECTLINK; - send_time = forward_send_time(); - add_bat_packet_to_list(bat_priv, - (unsigned char *)batman_packet, - sizeof(*batman_packet) + 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) @@ -557,7 +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); @@ -573,7 +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 @@ -581,7 +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 */ |