mirror of
https://github.com/ElementsProject/lightning.git
synced 2024-11-20 02:27:51 +01:00
7419fde9a0
The spec 4af8e1841151f0c6e8151979d6c89d11839b2f65 uses a 32-byte 'channel-id' field, not to be confused with the 8-byte short ID used by gossip. Rename appropriately, and update to the new handshake protocol. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
226 lines
6.9 KiB
C
226 lines
6.9 KiB
C
#include "daemon/broadcast.h"
|
|
#include "daemon/chaintopology.h"
|
|
#include "daemon/log.h"
|
|
#include "daemon/p2p_announce.h"
|
|
#include "daemon/packets.h"
|
|
#include "daemon/peer.h"
|
|
#include "daemon/peer_internal.h"
|
|
#include "daemon/routing.h"
|
|
#include "daemon/secrets.h"
|
|
#include "daemon/timeout.h"
|
|
#include "utils.h"
|
|
|
|
#include <ccan/tal/str/str.h>
|
|
#include <ccan/tal/tal.h>
|
|
#include <secp256k1.h>
|
|
|
|
static void broadcast_channel_update(struct lightningd_state *dstate, struct peer *peer)
|
|
{
|
|
struct txlocator *loc;
|
|
u8 *serialized;
|
|
secp256k1_ecdsa_signature signature;
|
|
struct short_channel_id short_channel_id;
|
|
u32 timestamp = time_now().ts.tv_sec;
|
|
const tal_t *tmpctx = tal_tmpctx(dstate);
|
|
|
|
loc = locate_tx(tmpctx, dstate->topology, &peer->anchor.txid);
|
|
short_channel_id.blocknum = loc->blkheight;
|
|
short_channel_id.txnum = loc->index;
|
|
short_channel_id.outnum = peer->anchor.index;
|
|
|
|
/* Avoid triggering memcheck */
|
|
memset(&signature, 0, sizeof(signature));
|
|
|
|
serialized = towire_channel_update(tmpctx, &signature, &short_channel_id,
|
|
timestamp,
|
|
pubkey_cmp(&dstate->id, peer->id) > 0,
|
|
dstate->config.min_htlc_expiry,
|
|
//FIXME(cdecker) Make the minimum HTLC configurable
|
|
1,
|
|
dstate->config.fee_base,
|
|
dstate->config.fee_per_satoshi);
|
|
privkey_sign(dstate, serialized + 66, tal_count(serialized) - 66,
|
|
&signature);
|
|
serialized = towire_channel_update(tmpctx, &signature, &short_channel_id,
|
|
timestamp,
|
|
pubkey_cmp(&dstate->id, peer->id) > 0,
|
|
dstate->config.min_htlc_expiry,
|
|
1,
|
|
dstate->config.fee_base,
|
|
dstate->config.fee_per_satoshi);
|
|
u8 *tag = tal_arr(tmpctx, u8, 0);
|
|
towire_short_channel_id(&tag, &short_channel_id);
|
|
queue_broadcast(dstate->rstate->broadcasts, WIRE_CHANNEL_UPDATE, tag, serialized);
|
|
tal_free(tmpctx);
|
|
}
|
|
|
|
static void broadcast_node_announcement(struct lightningd_state *dstate)
|
|
{
|
|
u8 *serialized;
|
|
secp256k1_ecdsa_signature signature;
|
|
static const u8 rgb_color[3];
|
|
static const u8 alias[32];
|
|
u32 timestamp = time_now().ts.tv_sec;
|
|
const tal_t *tmpctx = tal_tmpctx(dstate);
|
|
u8 *address;
|
|
|
|
/* Are we listening for incoming connections at all? */
|
|
if (!dstate->external_ip || !dstate->portnum) {
|
|
tal_free(tmpctx);
|
|
return;
|
|
}
|
|
|
|
/* Avoid triggering memcheck */
|
|
memset(&signature, 0, sizeof(signature));
|
|
|
|
address = write_ip(tmpctx, dstate->external_ip, dstate->portnum);
|
|
serialized = towire_node_announcement(tmpctx, &signature,
|
|
timestamp,
|
|
&dstate->id, rgb_color, alias,
|
|
NULL,
|
|
address);
|
|
privkey_sign(dstate, serialized + 66, tal_count(serialized) - 66,
|
|
&signature);
|
|
serialized = towire_node_announcement(tmpctx, &signature,
|
|
timestamp,
|
|
&dstate->id, rgb_color, alias,
|
|
NULL,
|
|
address);
|
|
u8 *tag = tal_arr(tmpctx, u8, 0);
|
|
towire_pubkey(&tag, &dstate->id);
|
|
queue_broadcast(dstate->rstate->broadcasts, WIRE_NODE_ANNOUNCEMENT, tag,
|
|
serialized);
|
|
tal_free(tmpctx);
|
|
}
|
|
|
|
static void broadcast_channel_announcement(struct lightningd_state *dstate, struct peer *peer)
|
|
{
|
|
struct txlocator *loc;
|
|
struct short_channel_id short_channel_id;
|
|
secp256k1_ecdsa_signature node_signature[2];
|
|
secp256k1_ecdsa_signature bitcoin_signature[2];
|
|
const struct pubkey *node_id[2];
|
|
const struct pubkey *bitcoin_key[2];
|
|
secp256k1_ecdsa_signature *my_node_signature;
|
|
secp256k1_ecdsa_signature *my_bitcoin_signature;
|
|
u8 *serialized;
|
|
const tal_t *tmpctx = tal_tmpctx(dstate);
|
|
|
|
loc = locate_tx(tmpctx, dstate->topology, &peer->anchor.txid);
|
|
|
|
short_channel_id.blocknum = loc->blkheight;
|
|
short_channel_id.txnum = loc->index;
|
|
short_channel_id.outnum = peer->anchor.index;
|
|
|
|
/* Set all sigs to zero */
|
|
memset(node_signature, 0, sizeof(node_signature));
|
|
memset(bitcoin_signature, 0, sizeof(bitcoin_signature));
|
|
|
|
//FIXME(cdecker) Copy remote stored signatures into place
|
|
if (pubkey_cmp(&dstate->id, peer->id) > 0) {
|
|
node_id[0] = peer->id;
|
|
node_id[1] = &dstate->id;
|
|
bitcoin_key[0] = peer->id;
|
|
bitcoin_key[1] = &dstate->id;
|
|
my_node_signature = &node_signature[1];
|
|
my_bitcoin_signature = &bitcoin_signature[1];
|
|
} else {
|
|
node_id[1] = peer->id;
|
|
node_id[0] = &dstate->id;
|
|
bitcoin_key[1] = peer->id;
|
|
bitcoin_key[0] = &dstate->id;
|
|
my_node_signature = &node_signature[0];
|
|
my_bitcoin_signature = &bitcoin_signature[0];
|
|
}
|
|
|
|
/* Sign the node_id with the bitcoin_key, proves delegation */
|
|
serialized = tal_arr(tmpctx, u8, 0);
|
|
towire_pubkey(&serialized, &dstate->id);
|
|
privkey_sign(dstate, serialized, tal_count(serialized), my_bitcoin_signature);
|
|
|
|
/* BOLT #7:
|
|
*
|
|
* The creating node MUST compute the double-SHA256 hash `h` of the
|
|
* message, starting at offset 256, up to the end of the message.
|
|
*/
|
|
serialized = towire_channel_announcement(tmpctx, &node_signature[0],
|
|
&node_signature[1],
|
|
&bitcoin_signature[0],
|
|
&bitcoin_signature[1],
|
|
&short_channel_id,
|
|
node_id[0],
|
|
node_id[1],
|
|
bitcoin_key[0],
|
|
bitcoin_key[1],
|
|
NULL);
|
|
privkey_sign(dstate, serialized + 256, tal_count(serialized) - 256, my_node_signature);
|
|
|
|
serialized = towire_channel_announcement(tmpctx, &node_signature[0],
|
|
&node_signature[1],
|
|
&bitcoin_signature[0],
|
|
&bitcoin_signature[1],
|
|
&short_channel_id,
|
|
node_id[0],
|
|
node_id[1],
|
|
bitcoin_key[0],
|
|
bitcoin_key[1],
|
|
NULL);
|
|
u8 *tag = tal_arr(tmpctx, u8, 0);
|
|
towire_short_channel_id(&tag, &short_channel_id);
|
|
queue_broadcast(dstate->rstate->broadcasts, WIRE_CHANNEL_ANNOUNCEMENT,
|
|
tag, serialized);
|
|
tal_free(tmpctx);
|
|
}
|
|
|
|
static void announce(struct lightningd_state *dstate)
|
|
{
|
|
struct peer *p;
|
|
int nchan = 0;
|
|
|
|
new_reltimer(&dstate->timers, dstate, time_from_sec(5*60*60), announce, dstate);
|
|
|
|
list_for_each(&dstate->peers, p, list) {
|
|
if (state_is_normal(p->state)) {
|
|
broadcast_channel_announcement(dstate, p);
|
|
broadcast_channel_update(dstate, p);
|
|
nchan += 1;
|
|
}
|
|
}
|
|
|
|
/* No point in broadcasting our node if we don't have a channel */
|
|
if (nchan > 0)
|
|
broadcast_node_announcement(dstate);
|
|
}
|
|
|
|
void announce_channel(struct lightningd_state *dstate, struct peer *peer)
|
|
{
|
|
broadcast_channel_announcement(dstate, peer);
|
|
broadcast_channel_update(dstate, peer);
|
|
broadcast_node_announcement(dstate);
|
|
|
|
}
|
|
|
|
static void process_broadcast_queue(struct lightningd_state *dstate)
|
|
{
|
|
struct peer *p;
|
|
struct queued_message *msg;
|
|
new_reltimer(&dstate->timers, dstate, time_from_sec(30), process_broadcast_queue, dstate);
|
|
list_for_each(&dstate->peers, p, list) {
|
|
if (!state_is_normal(p->state))
|
|
continue;
|
|
msg = next_broadcast_message(dstate->rstate->broadcasts,
|
|
&p->broadcast_index);
|
|
while (msg != NULL) {
|
|
queue_pkt_nested(p, msg->type, msg->payload);
|
|
msg = next_broadcast_message(dstate->rstate->broadcasts,
|
|
&p->broadcast_index);
|
|
}
|
|
}
|
|
}
|
|
|
|
void setup_p2p_announce(struct lightningd_state *dstate)
|
|
{
|
|
new_reltimer(&dstate->timers, dstate, time_from_sec(5*60*60), announce, dstate);
|
|
new_reltimer(&dstate->timers, dstate, time_from_sec(30), process_broadcast_queue, dstate);
|
|
}
|