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Send triggered updates

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This commit is contained in:
Matthias Schiffer 2012-10-08 03:24:05 +02:00
parent 26f5dc2ab0
commit ec21d1874e
3 changed files with 18 additions and 5 deletions
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11
ffd/announce.c
View file

@ -115,6 +115,15 @@ void ffd_announce_update(ffd_announce_t *announce) {
announce->selected = select_nexthop(announce);
announce->metric = get_metric(announce);
/* triggered updates */
int diff = announce->metric.metric - announce->last_metric;
if (((announce->last_metric == 0xffff) != (announce->metric.metric == 0xffff))
|| diff <= -1024 || diff >= 384) {
fprintf(stderr, "info: announce metric has changed significantly, sending updates\n");
ffd_send_update(NULL, NULL, announce, false);
}
}
void ffd_announce_update_nexthop(ffd_announce_t *announce, ffd_nexthop_t *nexthop, ffd_metric_seqno_t ms, uint16_t interval) {
@ -131,7 +140,7 @@ void ffd_announce_update_nexthop(ffd_announce_t *announce, ffd_nexthop_t *nextho
ffd_announce_t* ffd_announce_new(void) {
ffd_announce_t *a = calloc(1, sizeof(ffd_announce_t));
a->metric.metric = a->feasibility_distance.metric = 0xffff;
a->metric.metric = a->feasibility_distance.metric = a->last_metric = 0xffff;
a->next = announce_list;
announce_list = a;

1
ffd/ffd.h
View file

@ -81,6 +81,7 @@ typedef struct _ffd_announce_t {
uint16_t key;
ffd_metric_seqno_t metric;
uint16_t last_metric;
ffd_metric_seqno_t feasibility_distance;
ffd_nexthop_t *selected;

11
ffd/send.c
View file

@ -176,7 +176,7 @@ static bool add_node_id(ffd_packet_t *packet, size_t max_len, ffd_node_id_t node
return true;
}
static bool add_update(ffd_packet_t *packet, size_t max_len, ffd_node_id_t *node_id, ffd_announce_t *announce, bool with_data) {
static bool add_update(ffd_packet_t *packet, size_t max_len, ffd_node_id_t *node_id, ffd_announce_t *announce, bool with_data, bool targetted) {
if (announce->len && !announce->data) {
/* incomplete announce, handle like non-existant announce */
return true;
@ -217,6 +217,9 @@ static bool add_update(ffd_packet_t *packet, size_t max_len, ffd_node_id_t *node
if (ffd_is_metric_better(announce->metric, announce->feasibility_distance))
announce->feasibility_distance = announce->metric;
if (!targetted)
announce->last_metric = announce->metric.metric;
return true;
}
@ -227,20 +230,20 @@ void ffd_send_update(ffd_iface_t *iface, ffd_neigh_t *neigh, ffd_announce_t *ann
packet->len = 0;
if (announce) {
add_update(packet, FFD_PACKET_MAX, NULL, announce, with_data);
add_update(packet, FFD_PACKET_MAX, NULL, announce, with_data, iface || neigh);
}
else {
ffd_node_id_t node_id = FFD_NODE_ID_UNSPEC;
ffd_announce_t *a;
for (a = announce_list; a; a = a->next) {
if (!add_update(packet, FFD_PACKET_MAX, &node_id, a, with_data)) {
if (!add_update(packet, FFD_PACKET_MAX, &node_id, a, with_data, iface || neigh)) {
send_any(iface, neigh, packet);
node_id = FFD_NODE_ID_UNSPEC;
packet->len = 0;
if (!add_update(packet, FFD_PACKET_MAX, &node_id, a, with_data)) {
if (!add_update(packet, FFD_PACKET_MAX, &node_id, a, with_data, iface || neigh)) {
fprintf(stderr, "error: add_update failed\n");
return;
}