From 5d538bb78e1820a807a8670cd3075757f2e115f0 Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Sun, 7 Oct 2012 19:16:31 +0200
Subject: Periodically update selected nexthops

---
 ffd/announce.c |  9 ++++++---
 ffd/ffd.c      | 29 +++++++++++++++++++++++++++--
 ffd/ffd.h      |  3 ++-
 3 files changed, 35 insertions(+), 6 deletions(-)

diff --git a/ffd/announce.c b/ffd/announce.c
index 8911feb..99bf1aa 100644
--- a/ffd/announce.c
+++ b/ffd/announce.c
@@ -34,6 +34,9 @@ static ffd_nexthop_t* select_nexthop(const ffd_announce_t *announce) {
 
 	ffd_nexthop_t *nexthop;
 	for (nexthop = announce->nexthop_list; nexthop; nexthop = nexthop->next) {
+		if (!nexthop->neigh) /* local */
+			return nexthop;
+
 		if (!ffd_is_feasible(announce, nexthop->metric_seqno))
 			continue;
 
@@ -59,19 +62,19 @@ ffd_metric_seqno_t get_metric(const ffd_announce_t *announce) {
 	return (ffd_metric_seqno_t){0xffff, 0};
 }
 
-static inline void update_selected(ffd_announce_t *announce) {
+void ffd_announce_update(ffd_announce_t *announce) {
 	announce->selected = select_nexthop(announce);
 	announce->metric = get_metric(announce);
 }
 
-void ffd_announce_update(ffd_announce_t *announce, ffd_nexthop_t *nexthop, ffd_metric_seqno_t ms, uint16_t interval) {
+void ffd_announce_update_nexthop(ffd_announce_t *announce, ffd_nexthop_t *nexthop, ffd_metric_seqno_t ms, uint16_t interval) {
 	nexthop->metric_seqno = ms;
 	nexthop->interval = interval;
 
 	if (ms.metric != 0xffff)
 		nexthop->last_update = now;
 
-	update_selected(announce);
+	ffd_announce_update(announce);
 }
 
 ffd_announce_t* ffd_announce_new(void) {
diff --git a/ffd/ffd.c b/ffd/ffd.c
index 9af9598..ee1e3ea 100644
--- a/ffd/ffd.c
+++ b/ffd/ffd.c
@@ -93,7 +93,7 @@ static bool init_self(void) {
 	self.id[6] = primary_addr.d[4];
 	self.id[7] = primary_addr.d[5];
 
-	ffd_announce_t *announce = announce_list = calloc(1, sizeof(ffd_announce_t));
+	ffd_announce_t *announce = ffd_announce_new();
 
 	announce->node = self;
 	announce->type = 1;
@@ -222,6 +222,7 @@ static void handle_tlv_hello(const ffd_tlv_hello_t *tlv_hello, size_t len, handl
 		if (abs((int16_t)(seqno - seqexp)) > 16) {
 			fprintf(stderr, "info: neighbour was reset.\n");
 			neigh->hello_log = 0;
+			neigh->txcost = 0xffff;
 		}
 		else {
 			int16_t seqdiff = seqno - neigh->last_seqno;
@@ -376,7 +377,7 @@ static void handle_tlv_update(const ffd_tlv_update_t *tlv_update, size_t len, ha
 
 	fprintf(stderr, "debug: the update was accepted.\n");
 
-	ffd_announce_update(announce, nexthop, ms, ntohs(tlv_update->interval));
+	ffd_announce_update_nexthop(announce, nexthop, ms, ntohs(tlv_update->interval));
 }
 
 static void handle_tlv_announce_req(const ffd_tlv_announce_req_t *tlv_req, size_t len, handle_tlv_arg_t *arg) {
@@ -482,6 +483,30 @@ static void maintenance(void) {
 				iface->name, ffd_neigh_get_cost(neigh), ffd_neigh_get_rxcost(neigh), ffd_neigh_get_txcost(neigh));
 		}
 	}
+
+	ffd_announce_t *announce;
+	for (announce = announce_list; announce; announce = announce->next) {
+		ffd_announce_update(announce);
+
+		fprintf(stderr, "debug: maintenance: node %04x%04x, type %04x, announce %04x: ", ntohl(*(uint32_t*)announce->node.id), ntohl(*(uint32_t*)(announce->node.id+4)), announce->type, announce->key);
+
+		if (!announce->selected) {
+			fprintf(stderr, "nexthop: none\n");
+			continue;
+		}
+
+		ffd_neigh_t *neigh = announce->selected->neigh;
+
+		if (!neigh) {
+			fprintf(stderr, "local\n");
+			continue;
+		}
+
+		fprintf(stderr, "nexthop: %02x:%02x:%02x:%02x:%02x:%02x (%u, seqno=%04x)\n",
+			neigh->addr.d[0], neigh->addr.d[1], neigh->addr.d[2],
+			neigh->addr.d[3], neigh->addr.d[4], neigh->addr.d[5],
+			announce->metric.metric, announce->metric.seqno);
+	}
 }
 
 int main() {
diff --git a/ffd/ffd.h b/ffd/ffd.h
index 563b472..fa2c378 100644
--- a/ffd/ffd.h
+++ b/ffd/ffd.h
@@ -179,7 +179,8 @@ static inline bool ffd_is_feasible(const ffd_announce_t *announce, ffd_metric_se
 }
 
 
-void ffd_announce_update(ffd_announce_t *announce, ffd_nexthop_t *nexthop, ffd_metric_seqno_t ms, uint16_t interval);
+void ffd_announce_update(ffd_announce_t *announce);
+void ffd_announce_update_nexthop(ffd_announce_t *announce, ffd_nexthop_t *nexthop, ffd_metric_seqno_t ms, uint16_t interval);
 ffd_announce_t* ffd_announce_new(void);
 
 void ffd_send_ack(ffd_iface_t *iface, ffd_neigh_t *neigh, uint16_t nonce);
-- 
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