common/dijkstra: hand channel direction to path_score callback.

Signed-off-by: Rusty Russell <[email protected]>

Author: rustyrussell

common/dijkstra.c

@@ -139,6 +139,7 @@ dijkstra_(const tal_t *ctx,
 	  u64 (*path_score)(u32 distance,
 			    struct amount_msat cost,
 			    struct amount_msat risk,
+			    int dir,
 			    const struct gossmap_chan *c),
 	  void *arg)
 {
@@ -246,7 +247,7 @@ dijkstra_(const tal_t *ctx,
 			risk = risk_price(cost, riskfactor,
 					  cur_d->total_delay
 					  + c->half[!which_half].delay);
-			score = path_score(cur_d->distance + 1, cost, risk, c);
+			score = path_score(cur_d->distance + 1, cost, risk, !which_half, c);
 			if (score >= d->score)
 				continue;
 

common/dijkstra.h

@@ -22,6 +22,7 @@ dijkstra_(const tal_t *ctx,
 	  u64 (*path_score)(u32 distance,
 			    struct amount_msat cost,
 			    struct amount_msat risk,
+			    int dir,
 			    const struct gossmap_chan *c),
 	  void *arg);
 

common/route.c

@@ -44,6 +44,7 @@ static u32 costs_to_score(struct amount_msat cost,
 u64 route_score_shorter(u32 distance,
 			struct amount_msat cost,
 			struct amount_msat risk,
+			int dir UNUSED,
 			const struct gossmap_chan *c UNUSED)
 {
 	return costs_to_score(cost, risk) + ((u64)distance << 32);
@@ -53,6 +54,7 @@ u64 route_score_shorter(u32 distance,
 u64 route_score_cheaper(u32 distance,
 			struct amount_msat cost,
 			struct amount_msat risk,
+			int dir UNUSED,
 			const struct gossmap_chan *c UNUSED)
 {
 	return ((u64)costs_to_score(cost, risk) << 32) + distance;

common/route.h

@@ -57,12 +57,14 @@ bool route_can_carry_even_disabled(const struct gossmap *map,
 u64 route_score_shorter(u32 distance,
 			struct amount_msat cost,
 			struct amount_msat risk,
+			int dir UNUSED,
 			const struct gossmap_chan *c UNUSED);
 
 /* Cheapest path, with shorter path tiebreak */
 u64 route_score_cheaper(u32 distance,
 			struct amount_msat cost,
 			struct amount_msat risk,
+			int dir UNUSED,
 			const struct gossmap_chan *c UNUSED);
 
 /* Extract route tal_arr from completed dijkstra: NULL if none. */

plugins/topology.c

@@ -48,6 +48,7 @@ struct exclude_entry {
 static u64 route_score_fuzz(u32 distance,
 			    struct amount_msat cost,
 			    struct amount_msat risk,
+			    int dir UNUSED,
 			    const struct gossmap_chan *c)
 {
 	u64 costs = cost.millisatoshis + risk.millisatoshis; /* Raw: score */