EXPERMENTAL_FEATURES: Import onion message types.

This tracks lightning/bolts#759

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

Author: rustyrussell

channeld/channeld.c

@@ -1692,6 +1692,10 @@ static void peer_in(struct peer *peer, const u8 *msg)
 	case WIRE_SHUTDOWN:
 		handle_peer_shutdown(peer, msg);
 		return;
+#if EXPERIMENTAL_FEATURES
+	case WIRE_ONION_MESSAGE:
+		break;
+#endif
 
 	case WIRE_INIT:
 	case WIRE_OPEN_CHANNEL:

gossipd/gossipd.c

@@ -488,6 +488,9 @@ static struct io_plan *peer_msg_in(struct io_conn *conn,
 	case WIRE_CHANNEL_REESTABLISH:
 	case WIRE_ANNOUNCEMENT_SIGNATURES:
 	case WIRE_GOSSIP_TIMESTAMP_FILTER:
+#if EXPERIMENTAL_FEATURES
+	case WIRE_ONION_MESSAGE:
+#endif
 		status_broken("peer %s: relayed unexpected msg of type %s",
 			      type_to_string(tmpctx, struct node_id, &peer->id),
 			      wire_type_name(fromwire_peektype(msg)));

tools/check-spelling.sh

@@ -6,7 +6,7 @@ if git --no-pager grep -nHiE 'l[ightn]{6}g|l[ightn]{8}g|ilghtning|lgihtning|lihg
     exit 1
 fi
 
-if git --no-pager grep -nHiE 'ctlv' -- . ':!tools/check-spelling.sh'; then
+if git --no-pager grep -nHiE 'ctlv' | grep -v 'enctlv' -- . ':!tools/check-spelling.sh'; then
     echo "It's check lock time verify, not check time lock verify!" >&2
     exit 1
 fi

wire/extracted_onion_experimental_1b1c9a71038bd72453cabefd3ace17ce8b8dd96e

@@ -0,0 +1,28 @@
+--- wire/extracted_onion_wire_csv	2020-03-25 10:24:12.861645774 +1030
++++ -	2020-03-26 13:47:13.498294435 +1030
+@@ -8,6 +8,25 @@
+ tlvtype,tlv_payload,payment_data,8
+ tlvdata,tlv_payload,payment_data,payment_secret,byte,32
+ tlvdata,tlv_payload,payment_data,total_msat,tu64,
++tlvtype,onionmsg_payload,next_node_id,4
++tlvdata,onionmsg_payload,next_node_id,node_id,point,
++tlvtype,onionmsg_payload,next_short_channel_id,6
++tlvdata,onionmsg_payload,next_short_channel_id,short_channel_id,short_channel_id,
++tlvtype,onionmsg_payload,reply_path,8
++tlvdata,onionmsg_payload,reply_path,blinding,point,
++tlvdata,onionmsg_payload,reply_path,path,onionmsg_path,...
++tlvtype,onionmsg_payload,enctlv,10
++tlvdata,onionmsg_payload,enctlv,enctlv,byte,...
++tlvtype,onionmsg_payload,blinding,12
++tlvdata,onionmsg_payload,blinding,blinding,point,
++tlvtype,encmsg_tlvs,next_node_id,4
++tlvdata,encmsg_tlvs,next_node_id,node_id,point,
++tlvtype,encmsg_tlvs,next_short_channel_id,6
++tlvdata,encmsg_tlvs,next_short_channel_id,short_channel_id,short_channel_id,
++subtype,onionmsg_path
++subtypedata,onionmsg_path,node_id,point,
++subtypedata,onionmsg_path,enclen,u16,
++subtypedata,onionmsg_path,enctlv,byte,enclen
+ msgtype,invalid_realm,PERM|1
+ msgtype,temporary_node_failure,NODE|2
+ msgtype,permanent_node_failure,PERM|NODE|2

wire/extracted_peer_experimental_1b1c9a71038bd72453cabefd3ace17ce8b8dd96e

@@ -0,0 +1,11 @@
+--- wire/extracted_peer_wire_csv	2020-03-11 10:30:35.744376417 +1030
++++ -	2020-03-26 13:47:13.409755567 +1030
+@@ -211,3 +211,8 @@
+ msgdata,gossip_timestamp_filter,chain_hash,chain_hash,
+ msgdata,gossip_timestamp_filter,first_timestamp,u32,
+ msgdata,gossip_timestamp_filter,timestamp_range,u32,
++msgtype,onion_message,385,option_onion_messages
++msgdata,onion_message,onionmsg,byte,1366
++msgdata,onion_message,onion_message_tlvs,onion_message_tlvs,
++tlvtype,onion_message_tlvs,blinding,2
++tlvdata,onion_message_tlvs,blinding,blinding,point,

wire/peer_wire.c

@@ -31,6 +31,9 @@ static bool unknown_type(enum wire_type t)
 	case WIRE_QUERY_CHANNEL_RANGE:
 	case WIRE_REPLY_CHANNEL_RANGE:
 	case WIRE_GOSSIP_TIMESTAMP_FILTER:
+#if EXPERIMENTAL_FEATURES
+	case WIRE_ONION_MESSAGE:
+#endif
 		return false;
 	}
 	return true;
@@ -68,6 +71,9 @@ bool is_msg_for_gossipd(const u8 *cursor)
 	case WIRE_CHANNEL_REESTABLISH:
 	case WIRE_ANNOUNCEMENT_SIGNATURES:
 	case WIRE_GOSSIP_TIMESTAMP_FILTER:
+#if EXPERIMENTAL_FEATURES
+	case WIRE_ONION_MESSAGE:
+#endif
 		break;
 	}
 	return false;

wire/wire.h

@@ -153,4 +153,18 @@ struct witscript *fromwire_witscript(const tal_t *ctx,
 void fromwire_chainparams(const u8 **cursor, size_t *max,
 			  const struct chainparams **chainparams);
 
+#if !EXPERIMENTAL_FEATURES
+/* Stubs, as this subtype is only defined when EXPERIMENTAL_FEATURES */
+struct onionmsg_path;
+
+static inline void towire_onionmsg_path(u8 **p, const struct onionmsg_path *onionmsg_path)
+{
+}
+
+static inline struct onionmsg_path *
+fromwire_onionmsg_path(const tal_t *ctx, const u8 **cursor, size_t *plen)
+{
+	return NULL;
+}
+#endif /* EXPERIMENTAL_FEATURES */
 #endif /* LIGHTNING_WIRE_WIRE_H */