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batman-adv: Merge batadv_v_ogm_orig_update into batadv_v_ogm_route_update 

Since batadv_v_ogm_orig_update() was only called from one place and the
calling function became very short, merge these two functions together.

This should also reflect the protocol description of B.A.T.M.A.N. V
better.

Signed-off-by: Simon Wunderlich <simon@open-mesh.com>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <a@unstable.cc>
This commit is contained in:
Simon Wunderlich 2016-02-01 15:21:38 +01:00 committed by Antonio Quartulli
parent efcc9d3069
commit 86de37c1fb
1 changed files with 46 additions and 71 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

117
net/batman-adv/bat_v_ogm.c
View File

@ -233,73 +233,6 @@ void batadv_v_ogm_primary_iface_set(struct batadv_hard_iface *primary_iface)
ether_addr_copy(ogm_packet->orig, primary_iface->net_dev->dev_addr);
}
/**
* batadv_v_ogm_orig_update - update the originator status based on the received
* OGM
* @bat_priv: the bat priv with all the soft interface information
* @orig_node: the originator to update
* @neigh_node: the neighbour the OGM has been received from (to update)
* @ogm2: the received OGM
* @if_outgoing: the interface where this OGM is going to be forwarded through
*/
static void
batadv_v_ogm_orig_update(struct batadv_priv *bat_priv,
struct batadv_orig_node *orig_node,
struct batadv_neigh_node *neigh_node,
const struct batadv_ogm2_packet *ogm2,
struct batadv_hard_iface *if_outgoing)
{
struct batadv_neigh_ifinfo *router_ifinfo = NULL, *neigh_ifinfo = NULL;
struct batadv_neigh_node *router = NULL;
s32 neigh_seq_diff;
u32 neigh_last_seqno;
u32 router_last_seqno;
u32 router_throughput, neigh_throughput;
batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
"Searching and updating originator entry of received packet\n");
/* if this neighbor already is our next hop there is nothing
* to change
*/
router = batadv_orig_router_get(orig_node, if_outgoing);
if (router == neigh_node)
goto out;
/* don't consider neighbours with worse throughput.
* also switch route if this seqno is BATADV_V_MAX_ORIGDIFF newer than
* the last received seqno from our best next hop.
*/
if (router) {
router_ifinfo = batadv_neigh_ifinfo_get(router, if_outgoing);
neigh_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing);
/* if these are not allocated, something is wrong. */
if (!router_ifinfo || !neigh_ifinfo)
goto out;
neigh_last_seqno = neigh_ifinfo->bat_v.last_seqno;
router_last_seqno = router_ifinfo->bat_v.last_seqno;
neigh_seq_diff = neigh_last_seqno - router_last_seqno;
router_throughput = router_ifinfo->bat_v.throughput;
neigh_throughput = neigh_ifinfo->bat_v.throughput;
if ((neigh_seq_diff < BATADV_OGM_MAX_ORIGDIFF) &&
(router_throughput >= neigh_throughput))
goto out;
}
batadv_update_route(bat_priv, orig_node, if_outgoing, neigh_node);
out:
if (router_ifinfo)
batadv_neigh_ifinfo_put(router_ifinfo);
if (neigh_ifinfo)
batadv_neigh_ifinfo_put(neigh_ifinfo);
if (router)
batadv_neigh_node_put(router);
}
/**
* batadv_v_forward_penalty - apply a penalty to the throughput metric forwarded
* with B.A.T.M.A.N. V OGMs
@ -546,6 +479,11 @@ static bool batadv_v_ogm_route_update(struct batadv_priv *bat_priv,
struct batadv_neigh_node *router = NULL;
struct batadv_orig_node *orig_neigh_node = NULL;
struct batadv_neigh_node *orig_neigh_router = NULL;
struct batadv_neigh_ifinfo *router_ifinfo = NULL, *neigh_ifinfo = NULL;
u32 router_throughput, neigh_throughput;
u32 router_last_seqno;
u32 neigh_last_seqno;
s32 neigh_seq_diff;
bool forward = false;
orig_neigh_node = batadv_v_ogm_orig_get(bat_priv, ethhdr->h_source);
@ -565,11 +503,44 @@ static bool batadv_v_ogm_route_update(struct batadv_priv *bat_priv,
goto out;
}
/* Update routes, and check if the OGM is from the best next hop */
batadv_v_ogm_orig_update(bat_priv, orig_node, neigh_node, ogm2,
if_outgoing);
/* Mark the OGM to be considered for forwarding, and update routes
* if needed.
*/
forward = true;
batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
"Searching and updating originator entry of received packet\n");
/* if this neighbor already is our next hop there is nothing
* to change
*/
if (router == neigh_node)
goto out;
/* don't consider neighbours with worse throughput.
* also switch route if this seqno is BATADV_V_MAX_ORIGDIFF newer than
* the last received seqno from our best next hop.
*/
if (router) {
router_ifinfo = batadv_neigh_ifinfo_get(router, if_outgoing);
neigh_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing);
/* if these are not allocated, something is wrong. */
if (!router_ifinfo || !neigh_ifinfo)
goto out;
neigh_last_seqno = neigh_ifinfo->bat_v.last_seqno;
router_last_seqno = router_ifinfo->bat_v.last_seqno;
neigh_seq_diff = neigh_last_seqno - router_last_seqno;
router_throughput = router_ifinfo->bat_v.throughput;
neigh_throughput = neigh_ifinfo->bat_v.throughput;
if ((neigh_seq_diff < BATADV_OGM_MAX_ORIGDIFF) &&
(router_throughput >= neigh_throughput))
goto out;
}
batadv_update_route(bat_priv, orig_node, if_outgoing, neigh_node);
out:
if (router)
batadv_neigh_node_put(router);
@ -577,6 +548,10 @@ out:
batadv_neigh_node_put(orig_neigh_router);
if (orig_neigh_node)
batadv_orig_node_put(orig_neigh_node);
if (router_ifinfo)
batadv_neigh_ifinfo_put(router_ifinfo);
if (neigh_ifinfo)
batadv_neigh_ifinfo_put(neigh_ifinfo);
return forward;
}