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routing: free entire channel, not just node_connection on PERM error.

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And do it by reparenting onto the tmpctx, restoring some simpliciy.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2018-03-02 19:29:17 +10:30 committed by Christian Decker
parent 00194b6130
commit d0f68ffb15
1 changed files with 12 additions and 12 deletions
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20
gossipd/routing.c
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@ -1155,8 +1155,11 @@ struct route_hop *get_route(tal_t *ctx, struct routing_state *rstate,
/**
* routing_failure_channel_out - Handle routing failure on a specific channel
*
* If we want to delete the channel, we reparent it to disposal_context.
*/
static void routing_failure_channel_out(struct node *node,
static void routing_failure_channel_out(const tal_t *disposal_context,
struct node *node,
enum onion_type failcode,
struct routing_channel *chan,
time_t now)
@ -1176,7 +1179,8 @@ static void routing_failure_channel_out(struct node *node,
/* Prevent it for 20 seconds. */
nc->unroutable_until = now + 20;
else
tal_free(nc);
/* Set it up to be pruned. */
tal_steal(disposal_context, chan);
}
void routing_failure(struct routing_state *rstate,
@ -1216,13 +1220,8 @@ void routing_failure(struct routing_state *rstate,
*
*/
if (failcode & NODE) {
/* If permanent, we forget entire node and all its channels.
* If we did this in a loop, we might use-after-free. */
if (failcode & PERM) {
tal_free(node);
} else {
for (i = 0; i < tal_count(node->channels); ++i)
routing_failure_channel_out(node, failcode,
for (i = 0; i < tal_count(node->channels); ++i) {
routing_failure_channel_out(tmpctx, node, failcode,
node->channels[i],
now);
}
@ -1244,7 +1243,8 @@ void routing_failure(struct routing_state *rstate,
type_to_string(tmpctx, struct pubkey,
erring_node_pubkey));
else
routing_failure_channel_out(node, failcode, chan, now);
routing_failure_channel_out(tmpctx,
node, failcode, chan, now);
}
/* Update the channel if UPDATE failcode. Do