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gossipd: routine to get route_info for known incoming channels.

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For routeboost, we want to select from all our enabled channels with
sufficient incoming capacity.  Gossipd knows which are enabled (ie. we
have received a `channel_update` from the peer), but doesn't know the
current incoming capacity.

So we get gossipd to give us all the candidates, and lightningd
selects from those.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2018-09-27 14:59:17 +09:30
committed by Christian Decker
parent f64eee717d
commit 2f667c5227
3 changed files with 54 additions and 0 deletions
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10
gossipd/gossip_wire.csv
View File

@@ -165,3 +165,13 @@ gossip_outpoint_spent,,short_channel_id,struct short_channel_id
# master -> gossipd: stop gossip timers.
gossip_dev_suppress,3032
#include <common/bolt11.h>
# master -> gossipd: get route_info for our incoming channels
gossip_get_incoming_channels,3025
# gossipd -> master: here they are.
gossip_get_incoming_channels_reply,3125
gossip_get_incoming_channels_reply,,num,u16
gossip_get_incoming_channels_reply,,route_info,num*struct route_info
1 #include <common/cryptomsg.h>
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42
gossipd/gossipd.c
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@@ -1492,6 +1492,43 @@ out:
return daemon_conn_read_next(conn, &daemon->master);
}
static struct io_plan *get_incoming_channels(struct io_conn *conn,
struct daemon *daemon,
const u8 *msg)
{
struct node *node;
struct route_info *r = tal_arr(tmpctx, struct route_info, 0);
if (!fromwire_gossip_get_incoming_channels(msg))
master_badmsg(WIRE_GOSSIP_GET_INCOMING_CHANNELS, msg);
node = get_node(daemon->rstate, &daemon->rstate->local_id);
if (node) {
for (size_t i = 0; i < tal_count(node->chans); i++) {
const struct chan *c = node->chans[i];
const struct half_chan *hc;
struct route_info *ri;
hc = &c->half[half_chan_to(node, c)];
if (!is_halfchan_enabled(hc))
continue;
ri = tal_arr_expand(&r);
ri->pubkey = other_node(node, c)->id;
ri->short_channel_id = c->scid;
ri->fee_base_msat = hc->base_fee;
ri->fee_proportional_millionths = hc->proportional_fee;
ri->cltv_expiry_delta = hc->delay;
}
}
msg = towire_gossip_get_incoming_channels_reply(NULL, r);
daemon_conn_send(&daemon->master, take(msg));
return daemon_conn_read_next(conn, &daemon->master);
}
#if DEVELOPER
static struct io_plan *query_scids_req(struct io_conn *conn,
struct daemon *daemon,
@@ -1948,6 +1985,10 @@ static struct io_plan *recv_req(struct io_conn *conn, struct daemon_conn *master
case WIRE_GOSSIP_PING:
return ping_req(conn, daemon, daemon->master.msg_in);
case WIRE_GOSSIP_GET_INCOMING_CHANNELS:
return get_incoming_channels(conn, daemon,
daemon->master.msg_in);
#if DEVELOPER
case WIRE_GOSSIP_QUERY_SCIDS:
return query_scids_req(conn, daemon, daemon->master.msg_in);
@@ -1981,6 +2022,7 @@ static struct io_plan *recv_req(struct io_conn *conn, struct daemon_conn *master
case WIRE_GOSSIP_SCIDS_REPLY:
case WIRE_GOSSIP_QUERY_CHANNEL_RANGE_REPLY:
case WIRE_GOSSIP_RESOLVE_CHANNEL_REPLY:
case WIRE_GOSSIP_GET_INCOMING_CHANNELS_REPLY:
case WIRE_GOSSIP_GET_UPDATE:
case WIRE_GOSSIP_GET_UPDATE_REPLY:
case WIRE_GOSSIP_SEND_GOSSIP:

2
lightningd/gossip_control.c
View File

@@ -116,6 +116,7 @@ static unsigned gossip_msg(struct subd *gossip, const u8 *msg, const int *fds)
case WIRE_GOSSIP_QUERY_SCIDS:
case WIRE_GOSSIP_QUERY_CHANNEL_RANGE:
case WIRE_GOSSIP_SEND_TIMESTAMP_FILTER:
case WIRE_GOSSIP_GET_INCOMING_CHANNELS:
case WIRE_GOSSIP_DEV_SET_MAX_SCIDS_ENCODE_SIZE:
case WIRE_GOSSIP_DEV_SUPPRESS:
/* This is a reply, so never gets through to here. */
@@ -126,6 +127,7 @@ static unsigned gossip_msg(struct subd *gossip, const u8 *msg, const int *fds)
case WIRE_GOSSIP_SCIDS_REPLY:
case WIRE_GOSSIP_QUERY_CHANNEL_RANGE_REPLY:
case WIRE_GOSSIP_RESOLVE_CHANNEL_REPLY:
case WIRE_GOSSIP_GET_INCOMING_CHANNELS_REPLY:
/* These are inter-daemon messages, not received by us */
case WIRE_GOSSIP_LOCAL_ADD_CHANNEL:
case WIRE_GOSSIP_LOCAL_CHANNEL_UPDATE: