You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 
 
 

693 lines
20 KiB

#include "bitcoind.h"
#include "chaintopology.h"
#include "gossip_control.h"
#include "lightningd.h"
#include "peer_control.h"
#include "subd.h"
#include <ccan/array_size/array_size.h>
#include <ccan/crypto/siphash24/siphash24.h>
#include <ccan/err/err.h>
#include <ccan/fdpass/fdpass.h>
#include <ccan/json_escape/json_escape.h>
#include <ccan/take/take.h>
#include <ccan/tal/str/str.h>
#include <common/amount.h>
#include <common/features.h>
#include <common/json_command.h>
#include <common/json_helpers.h>
#include <common/jsonrpc_errors.h>
#include <common/param.h>
#include <common/type_to_string.h>
#include <common/utils.h>
#include <errno.h>
#include <gossipd/gen_gossip_wire.h>
#include <hsmd/capabilities.h>
#include <hsmd/gen_hsm_wire.h>
#include <inttypes.h>
#include <lightningd/connect_control.h>
#include <lightningd/gossip_msg.h>
#include <lightningd/hsm_control.h>
#include <lightningd/json.h>
#include <lightningd/jsonrpc.h>
#include <lightningd/log.h>
#include <lightningd/options.h>
#include <lightningd/ping.h>
#include <sodium/randombytes.h>
#include <string.h>
#include <wire/gen_peer_wire.h>
#include <wire/wire_sync.h>
static void got_txout(struct bitcoind *bitcoind,
const struct bitcoin_tx_output *output,
struct short_channel_id *scid)
{
const u8 *script;
struct amount_sat sat;
/* output will be NULL if it wasn't found */
if (output) {
script = output->script;
sat = output->amount;
} else {
script = NULL;
sat = AMOUNT_SAT(0);
}
subd_send_msg(
bitcoind->ld->gossip,
towire_gossip_get_txout_reply(scid, scid, sat, script));
tal_free(scid);
}
static void got_filteredblock(struct bitcoind *bitcoind,
const struct filteredblock *fb,
struct short_channel_id *scid)
{
struct filteredblock_outpoint *fbo = NULL, *o;
struct bitcoin_tx_output txo;
/* If we failed to the filtered block we report the failure to
* got_txout. */
if (fb == NULL)
return got_txout(bitcoind, NULL, scid);
/* Only fill in blocks that we are not going to scan later. */
if (bitcoind->ld->topology->max_blockheight > fb->height)
wallet_filteredblock_add(bitcoind->ld->wallet, fb);
u32 outnum = short_channel_id_outnum(scid);
u32 txindex = short_channel_id_txnum(scid);
for (size_t i=0; i<tal_count(fb->outpoints); i++) {
o = fb->outpoints[i];
if (o->txindex == txindex && o->outnum == outnum) {
fbo = o;
break;
}
}
if (fbo) {
txo.amount = fbo->amount;
txo.script = (u8 *)fbo->scriptPubKey;
got_txout(bitcoind, &txo, scid);
} else
got_txout(bitcoind, NULL, scid);
}
static void get_txout(struct subd *gossip, const u8 *msg)
{
struct short_channel_id *scid = tal(gossip, struct short_channel_id);
struct outpoint *op;
u32 blockheight;
struct chain_topology *topo = gossip->ld->topology;
if (!fromwire_gossip_get_txout(msg, scid))
fatal("Gossip gave bad GOSSIP_GET_TXOUT message %s",
tal_hex(msg, msg));
/* FIXME: Block less than 6 deep? */
blockheight = short_channel_id_blocknum(scid);
op = wallet_outpoint_for_scid(gossip->ld->wallet, scid, scid);
if (op) {
subd_send_msg(gossip,
towire_gossip_get_txout_reply(
scid, scid, op->sat, op->scriptpubkey));
tal_free(scid);
} else if (wallet_have_block(gossip->ld->wallet, blockheight)) {
/* We should have known about this outpoint since its header
* is in the DB. The fact that we don't means that this is
* either a spent outpoint or an invalid one. Return a
* failure. */
subd_send_msg(gossip, take(towire_gossip_get_txout_reply(
NULL, scid, AMOUNT_SAT(0), NULL)));
tal_free(scid);
} else {
bitcoind_getfilteredblock(topo->bitcoind, short_channel_id_blocknum(scid), got_filteredblock, scid);
}
}
static unsigned gossip_msg(struct subd *gossip, const u8 *msg, const int *fds)
{
enum gossip_wire_type t = fromwire_peektype(msg);
switch (t) {
/* These are messages we send, not them. */
case WIRE_GOSSIPCTL_INIT:
case WIRE_GOSSIP_GETNODES_REQUEST:
case WIRE_GOSSIP_GETROUTE_REQUEST:
case WIRE_GOSSIP_GETCHANNELS_REQUEST:
case WIRE_GOSSIP_PING:
case WIRE_GOSSIP_GET_STRIPPED_CUPDATE:
case WIRE_GOSSIP_GET_TXOUT_REPLY:
case WIRE_GOSSIP_OUTPOINT_SPENT:
case WIRE_GOSSIP_PAYMENT_FAILURE:
case WIRE_GOSSIP_GET_INCOMING_CHANNELS:
case WIRE_GOSSIP_DEV_SET_MAX_SCIDS_ENCODE_SIZE:
case WIRE_GOSSIP_DEV_SUPPRESS:
case WIRE_GOSSIP_LOCAL_CHANNEL_CLOSE:
case WIRE_GOSSIP_DEV_MEMLEAK:
case WIRE_GOSSIP_DEV_COMPACT_STORE:
case WIRE_GOSSIP_DEV_SET_TIME:
case WIRE_GOSSIP_NEW_BLOCKHEIGHT:
/* This is a reply, so never gets through to here. */
case WIRE_GOSSIP_GETNODES_REPLY:
case WIRE_GOSSIP_GETROUTE_REPLY:
case WIRE_GOSSIP_GETCHANNELS_REPLY:
case WIRE_GOSSIP_GET_INCOMING_CHANNELS_REPLY:
case WIRE_GOSSIP_DEV_MEMLEAK_REPLY:
case WIRE_GOSSIP_DEV_COMPACT_STORE_REPLY:
case WIRE_GOSSIP_GET_STRIPPED_CUPDATE_REPLY:
break;
case WIRE_GOSSIP_PING_REPLY:
ping_reply(gossip, msg);
break;
case WIRE_GOSSIP_GET_TXOUT:
get_txout(gossip, msg);
break;
}
return 0;
}
void gossip_notify_new_block(struct lightningd *ld, u32 blockheight)
{
/* Only notify gossipd once we're synced. */
if (!topology_synced(ld->topology))
return;
subd_send_msg(ld->gossip,
take(towire_gossip_new_blockheight(NULL, blockheight)));
}
static void gossip_topology_synced(struct chain_topology *topo, void *unused)
{
/* Now we start telling gossipd about blocks. */
gossip_notify_new_block(topo->ld, get_block_height(topo));
}
/* Create the `gossipd` subdaemon and send the initialization
* message */
void gossip_init(struct lightningd *ld, int connectd_fd)
{
u8 *msg;
int hsmfd;
hsmfd = hsm_get_global_fd(ld, HSM_CAP_SIGN_GOSSIP);
ld->gossip = new_global_subd(ld, "lightning_gossipd",
gossip_wire_type_name, gossip_msg,
take(&hsmfd), take(&connectd_fd), NULL);
if (!ld->gossip)
err(1, "Could not subdaemon gossip");
/* We haven't started topology yet, so tell us when we're synced. */
topology_add_sync_waiter(ld->gossip, ld->topology,
gossip_topology_synced, NULL);
msg = towire_gossipctl_init(
tmpctx,
chainparams,
ld->our_features,
&ld->id,
ld->rgb,
ld->alias,
ld->announcable,
IFDEV(ld->dev_gossip_time ? &ld->dev_gossip_time: NULL, NULL),
IFDEV(ld->dev_fast_gossip, false),
IFDEV(ld->dev_fast_gossip_prune, false));
subd_send_msg(ld->gossip, msg);
}
void gossipd_notify_spend(struct lightningd *ld,
const struct short_channel_id *scid)
{
u8 *msg = towire_gossip_outpoint_spent(tmpctx, scid);
subd_send_msg(ld->gossip, msg);
}
static void json_getnodes_reply(struct subd *gossip UNUSED, const u8 *reply,
const int *fds UNUSED,
struct command *cmd)
{
struct gossip_getnodes_entry **nodes;
struct json_stream *response;
size_t i, j;
if (!fromwire_gossip_getnodes_reply(reply, reply, &nodes)) {
was_pending(command_fail(cmd, LIGHTNINGD,
"Malformed gossip_getnodes response"));
return;
}
response = json_stream_success(cmd);
json_array_start(response, "nodes");
for (i = 0; i < tal_count(nodes); i++) {
struct json_escape *esc;
json_object_start(response, NULL);
json_add_node_id(response, "nodeid", &nodes[i]->nodeid);
if (nodes[i]->last_timestamp < 0) {
json_object_end(response);
continue;
}
esc = json_escape(NULL,
take(tal_strndup(NULL,
(const char *)nodes[i]->alias,
ARRAY_SIZE(nodes[i]->alias))));
json_add_escaped_string(response, "alias", take(esc));
json_add_hex(response, "color",
nodes[i]->color, ARRAY_SIZE(nodes[i]->color));
json_add_u64(response, "last_timestamp",
nodes[i]->last_timestamp);
json_add_hex_talarr(response, "features", nodes[i]->features);
json_array_start(response, "addresses");
for (j=0; j<tal_count(nodes[i]->addresses); j++) {
json_add_address(response, NULL, &nodes[i]->addresses[j]);
}
json_array_end(response);
json_object_end(response);
}
json_array_end(response);
was_pending(command_success(cmd, response));
}
static struct command_result *json_listnodes(struct command *cmd,
const char *buffer,
const jsmntok_t *obj UNNEEDED,
const jsmntok_t *params)
{
u8 *req;
struct node_id *id;
if (!param(cmd, buffer, params,
p_opt("id", param_node_id, &id),
NULL))
return command_param_failed();
req = towire_gossip_getnodes_request(cmd, id);
subd_req(cmd, cmd->ld->gossip, req, -1, 0, json_getnodes_reply, cmd);
return command_still_pending(cmd);
}
static const struct json_command listnodes_command = {
"listnodes",
"network",
json_listnodes,
"Show node {id} (or all, if no {id}), in our local network view"
};
AUTODATA(json_command, &listnodes_command);
static void json_add_route_hop_style(struct json_stream *response,
const char *fieldname,
enum route_hop_style style)
{
switch (style) {
case ROUTE_HOP_LEGACY:
json_add_string(response, fieldname, "legacy");
return;
case ROUTE_HOP_TLV:
json_add_string(response, fieldname, "tlv");
return;
}
fatal("Unknown route_hop_style %u", style);
}
/* Output a route hop */
static void json_add_route_hop(struct json_stream *r, char const *n,
const struct route_hop *h)
{
/* Imitate what getroute/sendpay use */
json_object_start(r, n);
json_add_node_id(r, "id", &h->nodeid);
json_add_short_channel_id(r, "channel",
&h->channel_id);
json_add_num(r, "direction", h->direction);
json_add_amount_msat_compat(r, h->amount, "msatoshi", "amount_msat");
json_add_num(r, "delay", h->delay);
json_add_route_hop_style(r, "style", h->style);
json_object_end(r);
}
/* Output a route */
static void json_add_route(struct json_stream *r, char const *n,
struct route_hop **hops, size_t hops_len)
{
size_t i;
json_array_start(r, n);
for (i = 0; i < hops_len; ++i) {
json_add_route_hop(r, NULL, hops[i]);
}
json_array_end(r);
}
static void json_getroute_reply(struct subd *gossip UNUSED, const u8 *reply, const int *fds UNUSED,
struct command *cmd)
{
struct json_stream *response;
struct route_hop **hops;
fromwire_gossip_getroute_reply(reply, reply, &hops);
if (tal_count(hops) == 0) {
was_pending(command_fail(cmd, PAY_ROUTE_NOT_FOUND,
"Could not find a route"));
return;
}
response = json_stream_success(cmd);
json_add_route(response, "route", hops, tal_count(hops));
was_pending(command_success(cmd, response));
}
static struct command_result *json_getroute(struct command *cmd,
const char *buffer,
const jsmntok_t *obj UNNEEDED,
const jsmntok_t *params)
{
struct lightningd *ld = cmd->ld;
struct node_id *destination;
struct node_id *source;
const jsmntok_t *excludetok;
struct amount_msat *msat;
u32 *cltv;
/* risk factor 12.345% -> riskfactor_millionths = 12345000 */
u64 *riskfactor_millionths;
const struct exclude_entry **excluded;
u32 *max_hops;
/* Higher fuzz means that some high-fee paths can be discounted
* for an even larger value, increasing the scope for route
* randomization (the higher-fee paths become more likely to
* be selected) at the cost of increasing the probability of
* selecting the higher-fee paths. */
u64 *fuzz_millionths; /* fuzz 12.345% -> fuzz_millionths = 12345000 */
if (!param(
cmd, buffer, params, p_req("id", param_node_id, &destination),
p_req("msatoshi", param_msat, &msat),
p_req("riskfactor", param_millionths, &riskfactor_millionths),
p_opt_def("cltv", param_number, &cltv, 9),
p_opt("fromid", param_node_id, &source),
p_opt_def("fuzzpercent", param_millionths, &fuzz_millionths,
5000000),
p_opt("exclude", param_array, &excludetok),
p_opt_def("maxhops", param_number, &max_hops, ROUTING_MAX_HOPS),
NULL))
return command_param_failed();
/* Convert from percentage */
*fuzz_millionths /= 100;
if (excludetok) {
const jsmntok_t *t;
size_t i;
excluded = tal_arr(cmd, const struct exclude_entry *, 0);
json_for_each_arr(i, t, excludetok) {
struct exclude_entry *entry = tal(excluded, struct exclude_entry);
struct short_channel_id_dir *chan_id = tal(tmpctx, struct short_channel_id_dir);
if (!short_channel_id_dir_from_str(buffer + t->start,
t->end - t->start,
chan_id)) {
struct node_id *node_id = tal(tmpctx, struct node_id);
if (!json_to_node_id(buffer, t, node_id))
return command_fail(cmd, JSONRPC2_INVALID_PARAMS,
"%.*s is not a valid"
" short_channel_id/node_id",
t->end - t->start,
buffer + t->start);
entry->type = EXCLUDE_NODE;
entry->u.node_id = *node_id;
} else {
entry->type = EXCLUDE_CHANNEL;
entry->u.chan_id = *chan_id;
}
tal_arr_expand(&excluded, entry);
}
} else {
excluded = NULL;
}
u8 *req = towire_gossip_getroute_request(
cmd, source, destination, *msat, *riskfactor_millionths, *cltv,
*fuzz_millionths, excluded, *max_hops);
subd_req(ld->gossip, ld->gossip, req, -1, 0, json_getroute_reply, cmd);
return command_still_pending(cmd);
}
static const struct json_command getroute_command = {
"getroute",
"channels",
json_getroute,
"Show route to {id} for {msatoshi}, using {riskfactor} and optional {cltv} (default 9). "
"If specified search from {fromid} otherwise use this node as source. "
"Randomize the route with up to {fuzzpercent} (default 5.0). "
"{exclude} an array of short-channel-id/direction (e.g. [ '564334x877x1/0', '564195x1292x0/1' ]) "
"or node-id from consideration. "
"Set the {maxhops} the route can take (default 20)."
};
AUTODATA(json_command, &getroute_command);
static void json_add_halfchan(struct json_stream *response,
const struct gossip_getchannels_entry *e,
int idx)
{
const struct gossip_halfchannel_entry *he = e->e[idx];
if (!he)
return;
json_object_start(response, NULL);
json_add_node_id(response, "source", &e->node[idx]);
json_add_node_id(response, "destination", &e->node[!idx]);
json_add_short_channel_id(response, "short_channel_id",
&e->short_channel_id);
json_add_bool(response, "public", e->public);
json_add_amount_sat_compat(response, e->sat,
"satoshis", "amount_msat");
json_add_num(response, "message_flags", he->message_flags);
json_add_num(response, "channel_flags", he->channel_flags);
json_add_bool(response, "active",
!(he->channel_flags & ROUTING_FLAGS_DISABLED)
&& !e->local_disabled);
json_add_num(response, "last_update", he->last_update_timestamp);
json_add_num(response, "base_fee_millisatoshi", he->base_fee_msat);
json_add_num(response, "fee_per_millionth", he->fee_per_millionth);
json_add_num(response, "delay", he->delay);
json_add_amount_msat_only(response, "htlc_minimum_msat", he->min);
json_add_amount_msat_only(response, "htlc_maximum_msat", he->max);
json_add_hex_talarr(response, "features", e->features);
json_object_end(response);
}
struct listchannels_info {
struct command *cmd;
struct json_stream *response;
struct short_channel_id *id;
struct node_id *source;
};
/* Called upon receiving a getchannels_reply from `gossipd` */
static void json_listchannels_reply(struct subd *gossip UNUSED, const u8 *reply,
const int *fds UNUSED,
struct listchannels_info *linfo)
{
size_t i;
struct gossip_getchannels_entry **entries;
bool complete;
if (!fromwire_gossip_getchannels_reply(reply, reply,
&complete, &entries)) {
/* Shouldn't happen: just end json stream. */
log_broken(linfo->cmd->ld->log, "Invalid reply from gossipd");
was_pending(command_raw_complete(linfo->cmd, linfo->response));
return;
}
for (i = 0; i < tal_count(entries); i++) {
json_add_halfchan(linfo->response, entries[i], 0);
json_add_halfchan(linfo->response, entries[i], 1);
}
/* More coming? Ask from this point on.. */
if (!complete) {
u8 *req;
assert(tal_count(entries) != 0);
req = towire_gossip_getchannels_request(linfo->cmd,
linfo->id,
linfo->source,
&entries[i-1]
->short_channel_id);
subd_req(linfo->cmd->ld->gossip, linfo->cmd->ld->gossip,
req, -1, 0, json_listchannels_reply, linfo);
} else {
json_array_end(linfo->response);
was_pending(command_success(linfo->cmd, linfo->response));
}
}
static struct command_result *json_listchannels(struct command *cmd,
const char *buffer,
const jsmntok_t *obj UNNEEDED,
const jsmntok_t *params)
{
u8 *req;
struct listchannels_info *linfo = tal(cmd, struct listchannels_info);
linfo->cmd = cmd;
if (!param(cmd, buffer, params,
p_opt("short_channel_id", param_short_channel_id, &linfo->id),
p_opt("source", param_node_id, &linfo->source),
NULL))
return command_param_failed();
if (linfo->id && linfo->source)
return command_fail(cmd, JSONRPC2_INVALID_PARAMS,
"Cannot specify both source and short_channel_id");
/* Start JSON response, then we stream. */
linfo->response = json_stream_success(cmd);
json_array_start(linfo->response, "channels");
req = towire_gossip_getchannels_request(cmd, linfo->id, linfo->source,
NULL);
subd_req(cmd->ld->gossip, cmd->ld->gossip,
req, -1, 0, json_listchannels_reply, linfo);
return command_still_pending(cmd);
}
static const struct json_command listchannels_command = {
"listchannels",
"channels",
json_listchannels,
"Show channel {short_channel_id} or {source} (or all known channels, if not specified)"
};
AUTODATA(json_command, &listchannels_command);
#if DEVELOPER
static struct command_result *
json_dev_set_max_scids_encode_size(struct command *cmd,
const char *buffer,
const jsmntok_t *obj UNNEEDED,
const jsmntok_t *params)
{
u8 *msg;
u32 *max;
if (!param(cmd, buffer, params,
p_req("max", param_number, &max),
NULL))
return command_param_failed();
msg = towire_gossip_dev_set_max_scids_encode_size(NULL, *max);
subd_send_msg(cmd->ld->gossip, take(msg));
return command_success(cmd, json_stream_success(cmd));
}
static const struct json_command dev_set_max_scids_encode_size = {
"dev-set-max-scids-encode-size",
"developer",
json_dev_set_max_scids_encode_size,
"Set {max} bytes of short_channel_ids per reply_channel_range"
};
AUTODATA(json_command, &dev_set_max_scids_encode_size);
static struct command_result *json_dev_suppress_gossip(struct command *cmd,
const char *buffer,
const jsmntok_t *obj UNNEEDED,
const jsmntok_t *params)
{
if (!param(cmd, buffer, params, NULL))
return command_param_failed();
subd_send_msg(cmd->ld->gossip, take(towire_gossip_dev_suppress(NULL)));
return command_success(cmd, json_stream_success(cmd));
}
static const struct json_command dev_suppress_gossip = {
"dev-suppress-gossip",
"developer",
json_dev_suppress_gossip,
"Stop this node from sending any more gossip."
};
AUTODATA(json_command, &dev_suppress_gossip);
static void dev_compact_gossip_store_reply(struct subd *gossip UNUSED,
const u8 *reply,
const int *fds UNUSED,
struct command *cmd)
{
bool success;
if (!fromwire_gossip_dev_compact_store_reply(reply, &success)) {
was_pending(command_fail(cmd, LIGHTNINGD,
"Gossip gave bad dev_gossip_compact_store_reply"));
return;
}
if (!success)
was_pending(command_fail(cmd, LIGHTNINGD,
"gossip_compact_store failed"));
else
was_pending(command_success(cmd, json_stream_success(cmd)));
}
static struct command_result *json_dev_compact_gossip_store(struct command *cmd,
const char *buffer,
const jsmntok_t *obj UNNEEDED,
const jsmntok_t *params)
{
u8 *msg;
if (!param(cmd, buffer, params, NULL))
return command_param_failed();
msg = towire_gossip_dev_compact_store(NULL);
subd_req(cmd->ld->gossip, cmd->ld->gossip,
take(msg), -1, 0, dev_compact_gossip_store_reply, cmd);
return command_still_pending(cmd);
}
static const struct json_command dev_compact_gossip_store = {
"dev-compact-gossip-store",
"developer",
json_dev_compact_gossip_store,
"Ask gossipd to rewrite the gossip store."
};
AUTODATA(json_command, &dev_compact_gossip_store);
static struct command_result *json_dev_gossip_set_time(struct command *cmd,
const char *buffer,
const jsmntok_t *obj UNNEEDED,
const jsmntok_t *params)
{
u8 *msg;
u32 *time;
if (!param(cmd, buffer, params,
p_req("time", param_number, &time),
NULL))
return command_param_failed();
msg = towire_gossip_dev_set_time(NULL, *time);
subd_send_msg(cmd->ld->gossip, take(msg));
return command_success(cmd, json_stream_success(cmd));
}
static const struct json_command dev_gossip_set_time = {
"dev-gossip-set-time",
"developer",
json_dev_gossip_set_time,
"Ask gossipd to update the current time."
};
AUTODATA(json_command, &dev_gossip_set_time);
#endif /* DEVELOPER */