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channeld: send our own pings whenever we indicate we want to send a commitment.

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This doesn't do much (though we might get an error before we send the
commitment_signed), but it's infrastructure for the next patch.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2018-08-09 12:23:17 +09:30 • committed by Christian Decker
parent 223cd97c94
commit 93e445daf5
2 changed files with 24 additions and 3 deletions
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1
channeld/Makefile
View file

@ -57,6 +57,7 @@ CHANNELD_COMMON_OBJS := \
common/peer_billboard.o \
common/peer_failed.o \
common/permute_tx.o \
common/ping.o \
common/pseudorand.o \
common/read_peer_msg.o \
common/sphinx.o \

26
channeld/channel.c
View file

@ -112,8 +112,8 @@ struct peer {
u64 commit_timer_attempts;
u32 commit_msec;
/* Don't accept a pong we didn't ping for. */
size_t num_pings_outstanding;
/* Are we expecting a pong? */
bool expecting_pong;
/* The feerate we want. */
u32 desired_feerate;
@ -928,6 +928,17 @@ static struct commit_sigs *calc_commitsigs(const tal_t *ctx,
return commit_sigs;
}
static void maybe_send_ping(struct peer *peer)
{
/* Already have a ping in flight? */
if (peer->expecting_pong)
return;
sync_crypto_write_no_delay(&peer->cs, PEER_FD,
take(make_ping(NULL, 1, 0)));
peer->expecting_pong = true;
}
static void send_commit(struct peer *peer)
{
u8 *msg;
@ -1045,6 +1056,9 @@ static void send_commit(struct peer *peer)
static void start_commit_timer(struct peer *peer)
{
/* We should send a ping now if we need a liveness check. */
maybe_send_ping(peer);
/* Already armed? */
if (peer->commit_timer)
return;
@ -1573,6 +1587,12 @@ static void peer_in(struct peer *peer, const u8 *msg)
{
enum wire_type type = fromwire_peektype(msg);
/* Catch our own ping replies. */
if (type == WIRE_PONG && peer->expecting_pong) {
peer->expecting_pong = false;
return;
}
if (handle_peer_gossip_or_error(PEER_FD, GOSSIP_FD,
&peer->cs,
&peer->channel_id, msg))
@ -2424,7 +2444,7 @@ int main(int argc, char *argv[])
subdaemon_setup(argc, argv);
peer = tal(NULL, struct peer);
peer->num_pings_outstanding = 0;
peer->expecting_pong = false;
timers_init(&peer->timers, time_mono());
peer->commit_timer = NULL;
peer->have_sigs[LOCAL] = peer->have_sigs[REMOTE] = false;