lightningd/peer_control: embed id, don't use pointer.

We always know it now we have struct connection, so we don't need a pointer.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

lightningd/dev_newhtlc.c

@@ -125,7 +125,7 @@ static void json_dev_newhtlc(struct command *cmd,
 	/* This is the last hop so set an empty channel_id */
 	memset(&hopsdata[0].channel_id, 0, sizeof(hopsdata[0].channel_id));
 
-	path[0] = *peer->id;
+	path[0] = peer->id;
 	randombytes_buf(&sessionkey, sizeof(sessionkey));
 	packet = create_onionpacket(cmd, path, hopsdata, sessionkey, rhash.u.u8,
 				    sizeof(rhash), &shared_secrets);

lightningd/gossip_control.c

@@ -36,7 +36,7 @@ static void peer_bad_message(struct subd *gossip, const u8 *msg)
 		fatal("Gossip gave bad peerid %"PRIu64, unique_id);
 
 	log_debug(gossip->log, "Peer %s gave bad msg %s",
-		  type_to_string(msg, struct pubkey, peer->id),
+		  type_to_string(msg, struct pubkey, &peer->id),
 		  tal_hex(msg, msg));
 	peer_fail(peer, "Bad message %s during gossip phase",
 		  gossip_wire_type_name(fromwire_peektype(msg)));
@@ -58,7 +58,7 @@ static void peer_failed(struct subd *gossip, const u8 *msg)
 		fatal("Gossip gave bad peerid %"PRIu64, unique_id);
 
 	log_unusual(gossip->log, "Peer %s failed: %.*s",
-		    type_to_string(msg, struct pubkey, peer->id),
+		    type_to_string(msg, struct pubkey, &peer->id),
 		    (int)tal_len(err), (const char *)err);
 	peer_fail(peer, "Error during gossip phase");
 }

lightningd/hsm_control.c

@@ -55,9 +55,7 @@ static int hsm_msg(struct subd *hsm, const u8 *msg, const int *fds)
 		/* "Shouldn't happen" */
 		errx(1, "HSM says bad cmd from %"PRIu64" (%s): %s",
 		     id,
-		     peer ? (peer->id ? type_to_string(msg, struct pubkey,
-						       peer->id)
-			     : "pubkey not yet known")
+		     peer ? type_to_string(msg, struct pubkey, &peer->id)
 		     : "unknown peer",
 		     tal_hex(msg, badmsg));
 

lightningd/peer_control.c

@@ -58,7 +58,7 @@ static struct peer *peer_by_pubkey(struct lightningd *ld, const struct pubkey *i
 {
 	struct peer *peer;
 	list_for_each(&ld->peers, peer, list) {
-		if (pubkey_cmp(id, peer->id) == 0)
+		if (pubkey_cmp(id, &peer->id) == 0)
 			return peer;
 	}
 	return NULL;
@@ -89,7 +89,7 @@ static void try_reconnect(struct peer *peer)
 		return;
 	}
 
-	c = new_connection(peer, peer->ld, NULL, peer->id);
+	c = new_connection(peer, peer->ld, NULL, &peer->id);
 
 	/* FIXME: Combine known address with gossip addresses and possibly
 	 * DNS seed addresses. */
@@ -288,7 +288,7 @@ void add_peer(struct lightningd *ld, u64 unique_id,
 	peer->unique_id = unique_id;
 	peer->owner = NULL;
 	peer->scid = NULL;
-	peer->id = tal_dup(peer, struct pubkey, id);
+	peer->id = *id;
 	peer->fd = fd;
 	peer->gossip_client_fd = -1;
 	peer->cs = tal_dup(peer, struct crypto_state, cs);
@@ -348,7 +348,7 @@ struct peer *peer_by_id(struct lightningd *ld, const struct pubkey *id)
 	struct peer *p;
 
 	list_for_each(&ld->peers, p, list)
-		if (pubkey_eq(p->id, id))
+		if (pubkey_eq(&p->id, id))
 			return p;
 	return NULL;
 }
@@ -579,8 +579,7 @@ static void json_getpeers(struct command *cmd,
 		json_add_string(response, "state", peer_state_name(p->state));
 		json_add_string(response, "netaddr",
 				netaddr_name(response, &p->netaddr));
-		if (p->id)
-			json_add_pubkey(response, "peerid", p->id);
+		json_add_pubkey(response, "peerid", &p->id);
 		if (p->owner)
 			json_add_string(response, "owner", p->owner->name);
 		if (p->scid)
@@ -1549,7 +1548,7 @@ static bool peer_start_channeld_hsmfd(struct subd *hsm, const u8 *resp,
 				      peer->push_msat,
 				      peer->seed,
 				      &peer->ld->dstate.id,
-				      peer->id,
+				      &peer->id,
 				      time_to_msec(cfg->commit_time),
 				      cfg->deadline_blocks,
 				      peer->funding_signed);
@@ -1816,7 +1815,7 @@ void peer_fundee_open(struct peer *peer, const u8 *from_peer)
 		       &min_effective_htlc_capacity_msat);
 
 	peer->seed = tal(peer, struct privkey);
-	derive_peer_seed(ld, peer->seed, peer->id);
+	derive_peer_seed(ld, peer->seed, &peer->id);
 	msg = towire_opening_init(peer, &peer->our_config,
 				  max_to_self_delay,
 				  min_effective_htlc_capacity_msat,
@@ -1891,7 +1890,7 @@ static bool gossip_peer_released(struct subd *gossip,
 		       &min_effective_htlc_capacity_msat);
 
 	fc->peer->seed = tal(fc->peer, struct privkey);
-	derive_peer_seed(ld, fc->peer->seed, fc->peer->id);
+	derive_peer_seed(ld, fc->peer->seed, &fc->peer->id);
 	msg = towire_opening_init(fc, &fc->peer->our_config,
 				  max_to_self_delay,
 				  min_effective_htlc_capacity_msat,

lightningd/peer_control.h

@@ -17,9 +17,12 @@ struct crypto_state;
 struct peer {
 	struct lightningd *ld;
 
-	/* Unique ID (works before we know their pubkey) */
+	/* Unique ID of connection (works even if we have multiple to same id) */
 	u64 unique_id;
 
+	/* ID of peer */
+	struct pubkey id;
+
  	/* What's happening. */
  	enum peer_state state;
 
@@ -36,9 +39,6 @@ struct peer {
 	struct log_book *log_book;
 	struct log *log;
 
-	/* ID of peer (NULL before initial handshake). */
-	struct pubkey *id;
-
 	/* Our fd to the peer (-1 when we don't have it). */
 	int fd;