Repository : ssh://git@open-mesh.org/alfred

On branch : master

commit 551d36947b5cb6fe07fd2e5443291454db61a904 Author: Sven Eckelmann sven.eckelmann@openmesh.com Date: Wed May 24 12:32:09 2017 +0200

alfred: Check the TQ of master servers before pushing data

The TQ value of the server might have changed dramatically since we received the last announcement of a master server. This can especially happen when node (which was previously the best server) moves a lot and its announcements are lost for a while.

Instead of querying the TQ values of each node when receiving an announcement, just query the TQ value before new data should be pushed to a master server.

Signed-off-by: Sven Eckelmann sven.eckelmann@openmesh.com Signed-off-by: Simon Wunderlich simon.wunderlich@openmesh.com

551d36947b5cb6fe07fd2e5443291454db61a904 alfred.h | 1 - recv.c | 21 +-------------------- server.c | 36 +++++++++++++++++++++++++++++++++++- 3 files changed, 36 insertions(+), 22 deletions(-)

diff --git a/alfred.h b/alfred.h index beda1a7..53d8b7a 100644 --- a/alfred.h +++ b/alfred.h @@ -153,7 +153,6 @@ extern alfred_addr alfred_mcast;

/* server.c */ int alfred_server(struct globals *globals); -int set_best_server(struct globals *globals); void changed_data_type(struct globals *globals, uint8_t arg);

/* client.c */ diff --git a/recv.c b/recv.c index 8aa512d..12bb3f1 100644 --- a/recv.c +++ b/recv.c @@ -268,7 +268,6 @@ process_alfred_announce_master(struct globals *globals, struct alfred_announce_master_v0 *announce) { struct server *server; - struct ether_addr *macaddr; struct ether_addr mac; int ret; int len; @@ -296,6 +295,7 @@ process_alfred_announce_master(struct globals *globals,

memcpy(&server->hwaddr, &mac, ETH_ALEN); memcpy(&server->address, source, sizeof(*source)); + server->tq = 0;

if (hash_add(interface->server_hash, server)) { free(server); @@ -305,25 +305,6 @@ process_alfred_announce_master(struct globals *globals,

clock_gettime(CLOCK_MONOTONIC, &server->last_seen);

- /* TQ is not used for master sync mode */ - if (globals->opmode == OPMODE_MASTER) { - server->tq = 0; - return 0; - } - - if (strcmp(globals->mesh_iface, "none") != 0) { - macaddr = translate_mac(globals->mesh_iface, - (struct ether_addr *)&server->hwaddr); - if (macaddr) - server->tq = get_tq(globals->mesh_iface, macaddr); - else - server->tq = 0; - } else { - server->tq = 255; - } - - set_best_server(globals); - return 0; }

diff --git a/server.c b/server.c index 2c4042a..09acb80 100644 --- a/server.c +++ b/server.c @@ -113,7 +113,7 @@ static int create_hashes(struct globals *globals) return 0; }

-int set_best_server(struct globals *globals) +static int set_best_server(struct globals *globals) { struct hash_it_t *hashit = NULL; struct server *best_server = NULL; @@ -218,6 +218,39 @@ static int purge_data(struct globals *globals) return 0; }

+static void update_server_info(struct globals *globals) +{ + struct hash_it_t *hashit = NULL; + struct interface *interface; + struct ether_addr *macaddr; + + /* TQ is not used for master sync mode */ + if (globals->opmode == OPMODE_MASTER) + return; + + list_for_each_entry(interface, &globals->interfaces, list) { + while (NULL != (hashit = hash_iterate(interface->server_hash, + hashit))) { + struct server *server = hashit->bucket->data; + + if (strcmp(globals->mesh_iface, "none") == 0) { + server->tq = 255; + continue; + } + + macaddr = translate_mac(globals->mesh_iface, + &server->hwaddr); + if (macaddr) + server->tq = get_tq(globals->mesh_iface, + macaddr); + else + server->tq = 0; + } + } + + set_best_server(globals); +} + static void check_if_socket(struct interface *interface, struct globals *globals) { int sock; @@ -422,6 +455,7 @@ int alfred_server(struct globals *globals) sync_data(globals); } else { /* send local data to server */ + update_server_info(globals); push_local_data(globals); } purge_data(globals);