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channeld: rename commit_index to next_index.

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This is what it actually is, and makes it clearer when we refer to the
spec.  It's the commitment we're currently updating, which is the next
commitment.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2017-06-27 12:25:06 +09:30 committed by Christian Decker
parent d411b07ba2
commit 42c9cb58c7
5 changed files with 48 additions and 50 deletions
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70
lightningd/channel/channel.c
View File

@ -58,7 +58,7 @@ struct peer {
struct peer_crypto_state pcs;
struct channel_config conf[NUM_SIDES];
bool funding_locked[NUM_SIDES];
u64 commit_index[NUM_SIDES];
u64 next_index[NUM_SIDES];
/* Remote's current per-commit point. */
struct pubkey remote_per_commit;
@ -458,7 +458,7 @@ static void handle_sending_commitsig_reply(struct peer *peer, const u8 *msg)
status_trace("Sending commit_sig with %zu htlc sigs",
tal_count(peer->next_commit_sigs->htlc_sigs));
peer->commit_index[REMOTE]++;
peer->next_index[REMOTE]++;
msg = towire_commitment_signed(peer, &peer->channel_id,
&peer->next_commit_sigs->commit_sig,
@ -606,11 +606,11 @@ static void send_commit(struct peer *peer)
}
peer->next_commit_sigs = calc_commitsigs(peer, peer,
peer->commit_index[REMOTE]);
peer->next_index[REMOTE]);
status_trace("Telling master we're about to commit...");
/* Tell master to save this next commit to database, then wait. */
msg = sending_commitsig_msg(tmpctx, peer->commit_index[REMOTE],
msg = sending_commitsig_msg(tmpctx, peer->next_index[REMOTE],
changed_htlcs,
&peer->next_commit_sigs->commit_sig,
peer->next_commit_sigs->htlc_sigs);
@ -671,10 +671,10 @@ static u8 *make_revocation_msg(const struct peer *peer, u64 revoke_index)
static struct io_plan *send_revocation(struct io_conn *conn, struct peer *peer)
{
/* Revoke previous commit. */
u8 *msg = make_revocation_msg(peer, peer->commit_index[LOCAL]-1);
u8 *msg = make_revocation_msg(peer, peer->next_index[LOCAL]-1);
/* From now on we apply changes to the next commitment */
peer->commit_index[LOCAL]++;
peer->next_index[LOCAL]++;
/* If this queues more changes on the other end, send commit. */
if (channel_sending_revoke_and_ack(peer->channel)) {
@ -828,13 +828,13 @@ static struct io_plan *handle_peer_commit_sig(struct io_conn *conn,
"Bad commit_sig %s", tal_hex(msg, msg));
if (!per_commit_point(&peer->shaseed, &point,
peer->commit_index[LOCAL]))
peer->next_index[LOCAL]))
status_failed(WIRE_CHANNEL_CRYPTO_FAILED,
"Deriving per_commit_point for %"PRIu64,
peer->commit_index[LOCAL]);
peer->next_index[LOCAL]);
txs = channel_txs(tmpctx, &htlc_map, &wscripts, peer->channel,
&point, peer->commit_index[LOCAL], LOCAL);
&point, peer->next_index[LOCAL], LOCAL);
if (!derive_simple_key(&peer->channel->basepoints[REMOTE].payment,
&point, &remotekey))
@ -859,7 +859,7 @@ static struct io_plan *handle_peer_commit_sig(struct io_conn *conn,
&peer->channel_id,
WIRE_CHANNEL_PEER_BAD_MESSAGE,
"Bad commit_sig signature %"PRIu64" %s for tx %s wscript %s key %s",
peer->commit_index[LOCAL],
peer->next_index[LOCAL],
type_to_string(msg, secp256k1_ecdsa_signature,
&commit_sig),
type_to_string(msg, struct bitcoin_tx, txs[0]),
@ -907,7 +907,7 @@ static struct io_plan *handle_peer_commit_sig(struct io_conn *conn,
tal_count(htlc_sigs));
/* Tell master daemon, then wait for ack. */
msg = got_commitsig_msg(tmpctx, peer->commit_index[LOCAL], &commit_sig,
msg = got_commitsig_msg(tmpctx, peer->next_index[LOCAL], &commit_sig,
htlc_sigs, changed_htlcs);
master_sync_reply(peer, take(msg),
@ -994,7 +994,7 @@ static struct io_plan *handle_peer_revoke_and_ack(struct io_conn *conn,
WIRE_CHANNEL_PEER_BAD_MESSAGE,
"Wrong privkey %s for %"PRIu64" %s",
type_to_string(msg, struct privkey, &privkey),
peer->commit_index[LOCAL]-2,
peer->next_index[LOCAL]-2,
type_to_string(msg, struct pubkey,
&peer->old_remote_per_commit));
}
@ -1007,7 +1007,7 @@ static struct io_plan *handle_peer_revoke_and_ack(struct io_conn *conn,
status_trace("No commits outstanding after recv revoke_and_ack");
/* Tell master about things this locks in, wait for response */
msg = got_revoke_msg(msg, peer->commit_index[REMOTE] - 2,
msg = got_revoke_msg(msg, peer->next_index[REMOTE] - 2,
&old_commit_secret, &next_per_commit,
changed_htlcs);
master_sync_reply(peer, take(msg),
@ -1344,8 +1344,8 @@ static void peer_conn_broken(struct io_conn *conn, struct peer *peer)
static void resend_revoke(struct peer *peer)
{
/* Current commit is peer->commit_index[LOCAL]-1, revoke prior */
u8 *msg = make_revocation_msg(peer, peer->commit_index[LOCAL]-2);
/* Current commit is peer->next_index[LOCAL]-1, revoke prior */
u8 *msg = make_revocation_msg(peer, peer->next_index[LOCAL]-2);
msg_enqueue(&peer->peer_out, take(msg));
}
@ -1421,7 +1421,7 @@ static void resend_commitment(struct peer *peer, const struct changed_htlc *last
}
/* Re-send the commitment_signed itself. */
commit_sigs = calc_commitsigs(peer, peer, peer->commit_index[REMOTE]-1);
commit_sigs = calc_commitsigs(peer, peer, peer->next_index[REMOTE]-1);
msg = towire_commitment_signed(peer, &peer->channel_id,
&commit_sigs->commit_sig,
commit_sigs->htlc_sigs);
@ -1452,10 +1452,8 @@ static void peer_reconnect(struct peer *peer)
* commitment number of the next `revoke_and_ack` message it expects
* to receive.
*/
/* Note: our commit_index is the current one we're working on, ie.
* the next one we expect a sig for. */
msg = towire_channel_reestablish(peer, &peer->channel_id,
peer->commit_index[LOCAL],
peer->next_index[LOCAL],
peer->revocations_received);
if (!sync_crypto_write(&peer->pcs.cs, PEER_FD, take(msg)))
status_failed(WIRE_CHANNEL_PEER_WRITE_FAILED,
@ -1504,7 +1502,7 @@ again:
msg_enqueue(&peer->peer_out, take(msg));
}
/* Note: commit_index is the index of the current commit we're working
/* Note: next_index is the index of the current commit we're working
* on, but BOLT #2 refers to the *last* commit index, so we -1 where
* required. */
@ -1518,21 +1516,21 @@ again:
* node has sent (or equal to zero if none have been sent), it SHOULD
* fail the channel.
*/
if (next_remote_revocation_number == peer->commit_index[LOCAL] - 2) {
if (next_remote_revocation_number == peer->next_index[LOCAL] - 2) {
/* Don't try to retransmit revocation index -1! */
if (peer->commit_index[LOCAL] < 2) {
if (peer->next_index[LOCAL] < 2) {
status_failed(WIRE_CHANNEL_PEER_READ_FAILED,
"bad reestablish revocation_number: %"
PRIu64,
next_remote_revocation_number);
}
retransmit_revoke_and_ack = true;
} else if (next_remote_revocation_number != peer->commit_index[LOCAL] - 1) {
} else if (next_remote_revocation_number != peer->next_index[LOCAL] - 1) {
status_failed(WIRE_CHANNEL_PEER_READ_FAILED,
"bad reestablish revocation_number: %"PRIu64
" vs %"PRIu64,
next_remote_revocation_number,
peer->commit_index[LOCAL]);
peer->next_index[LOCAL]);
} else
retransmit_revoke_and_ack = false;
@ -1548,7 +1546,7 @@ again:
* sent, it MUST reuse the same commitment number for its next
* `commitment_signed`
*/
if (next_local_commitment_number == peer->commit_index[REMOTE] - 1) {
if (next_local_commitment_number == peer->next_index[REMOTE] - 1) {
/* We completed opening, we don't re-transmit that one! */
if (next_local_commitment_number == 0)
status_failed(WIRE_CHANNEL_PEER_READ_FAILED,
@ -1564,7 +1562,7 @@ again:
* than the commitment number of the last `commitment_signed` message
* the receiving node has sent, it SHOULD fail the channel.
*/
} else if (next_local_commitment_number != peer->commit_index[REMOTE])
} else if (next_local_commitment_number != peer->next_index[REMOTE])
peer_failed(PEER_FD,
&peer->pcs.cs,
&peer->channel_id,
@ -1572,7 +1570,7 @@ again:
"bad reestablish commitment_number: %"PRIu64
" vs %"PRIu64,
next_local_commitment_number,
peer->commit_index[REMOTE]);
peer->next_index[REMOTE]);
/* This covers the case where we sent revoke after commit. */
if (retransmit_revoke_and_ack && peer->last_was_revoke)
@ -1642,8 +1640,8 @@ static void init_channel(struct peer *peer)
&peer->cltv_delta,
&peer->last_was_revoke,
&peer->last_sent_commit,
&peer->commit_index[LOCAL],
&peer->commit_index[REMOTE],
&peer->next_index[LOCAL],
&peer->next_index[REMOTE],
&peer->revocations_received,
&peer->htlc_id,
&htlcs,
@ -1662,21 +1660,21 @@ static void init_channel(struct peer *peer)
tal_hex(msg, msg));
status_trace("init %s: remote_per_commit = %s, old_remote_per_commit = %s"
" commit_idx_local = %"PRIu64
" commit_idx_remote = %"PRIu64
" next_idx_local = %"PRIu64
" next_idx_remote = %"PRIu64
" revocations_received = %"PRIu64,
am_funder ? "LOCAL" : "REMOTE",
type_to_string(trc, struct pubkey,
&peer->remote_per_commit),
type_to_string(trc, struct pubkey,
&peer->old_remote_per_commit),
peer->commit_index[LOCAL], peer->commit_index[REMOTE],
peer->next_index[LOCAL], peer->next_index[REMOTE],
peer->revocations_received);
/* First commit is used for opening: if we've sent 0, we're on
* index 1. */
assert(peer->commit_index[LOCAL] > 0);
assert(peer->commit_index[REMOTE] > 0);
assert(peer->next_index[LOCAL] > 0);
assert(peer->next_index[REMOTE] > 0);
/* channel_id is set from funding txout */
derive_channel_id(&peer->channel_id, &funding_txid, funding_txout);
@ -1727,10 +1725,10 @@ static void handle_funding_locked(struct peer *peer, const u8 *msg)
status_failed(WIRE_CHANNEL_BAD_COMMAND, "%s", tal_hex(msg, msg));
per_commit_point(&peer->shaseed,
&next_per_commit_point, peer->commit_index[LOCAL]);
&next_per_commit_point, peer->next_index[LOCAL]);
status_trace("funding_locked: sending commit index %"PRIu64": %s",
peer->commit_index[LOCAL],
peer->next_index[LOCAL],
type_to_string(trc, struct pubkey, &next_per_commit_point));
msg = towire_funding_locked(peer,
&peer->channel_id, &next_per_commit_point);

4
lightningd/channel/channel_wire.csv
View File

@ -47,8 +47,8 @@ channel_init,,cltv_delta,u16
channel_init,,last_was_revoke,bool
channel_init,,num_last_sent_commit,u16
channel_init,,last_sent_commit,num_last_sent_commit*struct changed_htlc
channel_init,,commit_index_local,u64
channel_init,,commit_index_remote,u64
channel_init,,next_index_local,u64
channel_init,,next_index_remote,u64
channel_init,,revocations_received,u64
channel_init,,next_htlc_id,u64
channel_init,,num_htlcs,u16

1 # Shouldn't happen
47 channel_init,,revocations_received,u64
48 channel_init,,next_htlc_id,u64
49 channel_init,,num_htlcs,u16
50 channel_init,,htlcs,num_htlcs*struct added_htlc
51 channel_init,,htlc_states,num_htlcs*enum htlc_state
52 channel_init,,num_fulfilled,u16
53 channel_init,,fulfilled,num_fulfilled*struct fulfilled_htlc
54 channel_init,,fulfilled_sides,num_fulfilled*enum side

10
lightningd/peer_control.c
View File

@ -377,8 +377,8 @@ void add_peer(struct lightningd *ld, u64 unique_id,
peer->last_sent_commit = NULL;
peer->remote_shutdown_scriptpubkey = NULL;
peer->local_shutdown_idx = -1;
peer->commit_index[LOCAL]
= peer->commit_index[REMOTE]
peer->next_index[LOCAL]
= peer->next_index[REMOTE]
= peer->num_revocations_received = 0;
peer->next_htlc_id = 0;
shachain_init(&peer->their_shachain);
@ -1192,8 +1192,8 @@ static bool peer_start_channeld(struct peer *peer,
cfg->deadline_blocks,
peer->last_was_revoke,
peer->last_sent_commit,
peer->commit_index[LOCAL],
peer->commit_index[REMOTE],
peer->next_index[LOCAL],
peer->next_index[REMOTE],
peer->num_revocations_received,
peer->next_htlc_id,
htlcs, htlc_states,
@ -1215,7 +1215,7 @@ static bool peer_start_channeld(struct peer *peer,
static bool peer_commit_initial(struct peer *peer)
{
peer->commit_index[LOCAL] = peer->commit_index[REMOTE] = 1;
peer->next_index[LOCAL] = peer->next_index[REMOTE] = 1;
/* FIXME: Db channel_info, etc. */
return true;

2
lightningd/peer_control.h
View File

@ -63,7 +63,7 @@ struct peer {
u32 minimum_depth;
/* Tracking commitment transaction numbers. */
u64 commit_index[NUM_SIDES];
u64 next_index[NUM_SIDES];
u64 num_revocations_received;
u64 next_htlc_id;

12
lightningd/peer_htlcs.c
View File

@ -834,15 +834,15 @@ static bool changed_htlc(struct peer *peer,
static bool peer_save_commitsig_received(struct peer *peer, u64 commitnum)
{
if (commitnum != peer->commit_index[LOCAL]) {
if (commitnum != peer->next_index[LOCAL]) {
peer_internal_error(peer,
"channel_got_commitsig: expected commitnum %"PRIu64
" got %"PRIu64,
peer->commit_index[LOCAL], commitnum);
peer->next_index[LOCAL], commitnum);
return false;
}
peer->commit_index[LOCAL]++;
peer->next_index[LOCAL]++;
/* FIXME: Save to database, with sig and HTLCs. */
return true;
@ -850,15 +850,15 @@ static bool peer_save_commitsig_received(struct peer *peer, u64 commitnum)
static bool peer_save_commitsig_sent(struct peer *peer, u64 commitnum)
{
if (commitnum != peer->commit_index[REMOTE]) {
if (commitnum != peer->next_index[REMOTE]) {
peer_internal_error(peer,
"channel_sent_commitsig: expected commitnum %"PRIu64
" got %"PRIu64,
peer->commit_index[REMOTE], commitnum);
peer->next_index[REMOTE], commitnum);
return false;
}
peer->commit_index[REMOTE]++;
peer->next_index[REMOTE]++;
/* FIXME: Save to database, with sig and HTLCs. */
return true;