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#include "gossip_control.h"
#include "lightningd.h"
#include "peer_control.h"
#include "subd.h"
#include <ccan/err/err.h>
#include <ccan/fdpass/fdpass.h>
#include <ccan/take/take.h>
#include <ccan/tal/str/str.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_client_wire.h>
#include <inttypes.h>
#include <lightningd/gossip_msg.h>
#include <lightningd/hsm_control.h>
#include <lightningd/jsonrpc.h>
#include <lightningd/log.h>
#include <wire/gen_peer_wire.h>
#include <wire/wire_sync.h>
static void peer_nongossip(struct subd *gossip, const u8 *msg,
int peer_fd, int gossip_fd)
{
struct pubkey id;
struct crypto_state cs;
struct wireaddr addr;
u8 *gfeatures, *lfeatures, *in_pkt;
if (!fromwire_gossip_peer_nongossip(msg, msg, NULL,
&id, &addr, &cs,
&gfeatures,
&lfeatures,
&in_pkt))
fatal("Gossip gave bad GOSSIP_PEER_NONGOSSIP message %s",
tal_hex(msg, msg));
/* We already checked the features when it first connected. */
if (unsupported_features(gfeatures, lfeatures)) {
log_unusual(gossip->log,
"Gossip gave unsupported features %s/%s",
tal_hex(msg, gfeatures),
tal_hex(msg, lfeatures));
close(peer_fd);
close(gossip_fd);
return;
}
peer_sent_nongossip(gossip->ld, &id, &addr, &cs, gfeatures, lfeatures,
peer_fd, gossip_fd, in_pkt);
}
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_GETPEERS_REQUEST:
case WIRE_GOSSIP_PING:
case WIRE_GOSSIP_RESOLVE_CHANNEL_REQUEST:
case WIRE_GOSSIP_FORWARDED_MSG:
case WIRE_GOSSIPCTL_REACH_PEER:
case WIRE_GOSSIPCTL_HANDLE_PEER:
case WIRE_GOSSIPCTL_RELEASE_PEER:
case WIRE_GOSSIPCTL_PEER_ADDRHINT:
case WIRE_GOSSIP_GET_UPDATE:
/* This is a reply, so never gets through to here. */
case WIRE_GOSSIP_GET_UPDATE_REPLY:
case WIRE_GOSSIP_GETNODES_REPLY:
case WIRE_GOSSIP_GETROUTE_REPLY:
case WIRE_GOSSIP_GETCHANNELS_REPLY:
case WIRE_GOSSIP_GETPEERS_REPLY:
case WIRE_GOSSIP_PING_REPLY:
case WIRE_GOSSIP_RESOLVE_CHANNEL_REPLY:
case WIRE_GOSSIPCTL_RELEASE_PEER_REPLY:
case WIRE_GOSSIPCTL_RELEASE_PEER_REPLYFAIL:
break;
case WIRE_GOSSIP_PEER_CONNECTED:
if (tal_count(fds) != 2)
return 2;
peer_connected(gossip->ld, msg, fds[0], fds[1]);
break;
case WIRE_GOSSIP_PEER_NONGOSSIP:
if (tal_count(fds) != 2)
return 2;
peer_nongossip(gossip, msg, fds[0], fds[1]);
break;
}
return 0;
}
/* Create the `gossipd` subdaemon and send the initialization
* message */
void gossip_init(struct lightningd *ld)
{
tal_t *tmpctx = tal_tmpctx(ld);
u8 *msg;
int hsmfd;
u64 capabilities = HSM_CAP_ECDH | HSM_CAP_SIGN_GOSSIP;
msg = towire_hsm_client_hsmfd(tmpctx, &ld->id, capabilities);
if (!wire_sync_write(ld->hsm_fd, msg))
fatal("Could not write to HSM: %s", strerror(errno));
msg = hsm_sync_read(tmpctx, ld);
if (!fromwire_hsm_client_hsmfd_reply(msg, NULL))
fatal("Malformed hsmfd response: %s", tal_hex(msg, msg));
hsmfd = fdpass_recv(ld->hsm_fd);
if (hsmfd < 0)
fatal("Could not read fd from HSM: %s", strerror(errno));
ld->gossip = new_global_subd(ld, "lightning_gossipd",
gossip_wire_type_name, gossip_msg,
take(&hsmfd), NULL);
if (!ld->gossip)
err(1, "Could not subdaemon gossip");
msg = towire_gossipctl_init(tmpctx, ld->broadcast_interval,
&get_chainparams(ld)->genesis_blockhash,
&ld->id, ld->portnum,
get_supported_global_features(tmpctx),
get_supported_local_features(tmpctx));
subd_send_msg(ld->gossip, msg);
tal_free(tmpctx);
}
static void json_getnodes_reply(struct subd *gossip, const u8 *reply,
const int *fds,
struct command *cmd)
{
struct gossip_getnodes_entry *nodes;
struct json_result *response = new_json_result(cmd);
size_t i, j;
if (!fromwire_gossip_getnodes_reply(reply, reply, NULL, &nodes)) {
command_fail(cmd, "Malformed gossip_getnodes response");
return;
}
json_object_start(response, NULL);
json_array_start(response, "nodes");
for (i = 0; i < tal_count(nodes); i++) {
json_object_start(response, NULL);
json_add_pubkey(response, "nodeid", &nodes[i].nodeid);
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);
json_object_end(response);
command_success(cmd, response);
}
static void json_getnodes(struct command *cmd, const char *buffer,
const jsmntok_t *params)
{
u8 *req = towire_gossip_getnodes_request(cmd);
subd_req(cmd, cmd->ld->gossip, req, -1, 0, json_getnodes_reply, cmd);
}
static const struct json_command getnodes_command = {
"getnodes", json_getnodes, "Retrieve all nodes in our local network view",
"Returns a list of all nodes that we know about"};
AUTODATA(json_command, &getnodes_command);
static void json_getroute_reply(struct subd *gossip, const u8 *reply, const int *fds,
struct command *cmd)
{
struct json_result *response;
struct route_hop *hops;
size_t i;
fromwire_gossip_getroute_reply(reply, reply, NULL, &hops);
if (tal_count(hops) == 0) {
command_fail(cmd, "Could not find a route");
return;
}
response = new_json_result(cmd);
json_object_start(response, NULL);
json_array_start(response, "route");
for (i = 0; i < tal_count(hops); i++) {
json_object_start(response, NULL);
json_add_pubkey(response, "id", &hops[i].nodeid);
json_add_short_channel_id(response, "channel",
&hops[i].channel_id);
json_add_u64(response, "msatoshi", hops[i].amount);
json_add_num(response, "delay", hops[i].delay);
json_object_end(response);
}
json_array_end(response);
json_object_end(response);
command_success(cmd, response);
}
static void json_getroute(struct command *cmd, const char *buffer, const jsmntok_t *params)
{
struct pubkey id;
jsmntok_t *idtok, *msatoshitok, *riskfactortok, *cltvtok;
u64 msatoshi;
unsigned cltv = 9;
double riskfactor;
struct lightningd *ld = cmd->ld;
if (!json_get_params(buffer, params,
"id", &idtok,
"msatoshi", &msatoshitok,
"riskfactor", &riskfactortok,
"?cltv", &cltvtok,
NULL)) {
command_fail(cmd, "Need id, msatoshi and riskfactor");
return;
}
if (!json_tok_pubkey(buffer, idtok, &id)) {
command_fail(cmd, "Invalid id");
return;
}
if (cltvtok && !json_tok_number(buffer, cltvtok, &cltv)) {
command_fail(cmd, "Invalid cltv");
return;
}
if (!json_tok_u64(buffer, msatoshitok, &msatoshi)) {
command_fail(cmd, "'%.*s' is not a valid number",
(int)(msatoshitok->end - msatoshitok->start),
buffer + msatoshitok->start);
return;
}
if (!json_tok_double(buffer, riskfactortok, &riskfactor)) {
command_fail(cmd, "'%.*s' is not a valid double",
(int)(riskfactortok->end - riskfactortok->start),
buffer + riskfactortok->start);
return;
}
u8 *req = towire_gossip_getroute_request(cmd, &ld->id, &id, msatoshi, riskfactor*1000, cltv);
subd_req(ld->gossip, ld->gossip, req, -1, 0, json_getroute_reply, cmd);
}
static const struct json_command getroute_command = {
"getroute", json_getroute,
"Return route to {id} for {msatoshi}, using {riskfactor} and optional {cltv} (default 9)",
"Returns a {route} array of {id} {msatoshi} {delay}: msatoshi and delay (in blocks) is cumulative."
};
AUTODATA(json_command, &getroute_command);
/* Called upon receiving a getchannels_reply from `gossipd` */
static void json_getchannels_reply(struct subd *gossip, const u8 *reply,
const int *fds, struct command *cmd)
{
size_t i;
struct gossip_getchannels_entry *entries;
struct json_result *response = new_json_result(cmd);
struct short_channel_id *scid;
if (!fromwire_gossip_getchannels_reply(reply, reply, NULL, &entries)) {
command_fail(cmd, "Invalid reply from gossipd");
return;
}
json_object_start(response, NULL);
json_array_start(response, "channels");
for (i = 0; i < tal_count(entries); i++) {
scid = &entries[i].short_channel_id;
json_object_start(response, NULL);
json_add_pubkey(response, "source", &entries[i].source);
json_add_pubkey(response, "destination",
&entries[i].destination);
json_add_string(response, "short_id",
tal_fmt(reply, "%d:%d:%d/%d", scid->blocknum,
scid->txnum, scid->outnum,
entries[i].flags & 0x1));
json_add_num(response, "flags", entries[i].flags);
json_add_bool(response, "active", entries[i].active);
if (entries[i].last_update_timestamp >= 0) {
json_add_num(response, "last_update",
entries[i].last_update_timestamp);
json_add_num(response, "base_fee_millisatoshi",
entries[i].base_fee_msat);
json_add_num(response, "fee_per_millionth",
entries[i].fee_per_millionth);
json_add_num(response, "delay", entries[i].delay);
}
json_object_end(response);
}
json_array_end(response);
json_object_end(response);
command_success(cmd, response);
}
static void json_getchannels(struct command *cmd, const char *buffer,
const jsmntok_t *params)
{
u8 *req = towire_gossip_getchannels_request(cmd);
subd_req(cmd->ld->gossip, cmd->ld->gossip,
req, -1, 0, json_getchannels_reply, cmd);
}
static const struct json_command getchannels_command = {
"getchannels", json_getchannels, "List all known channels.",
"Returns a 'channels' array with all known channels including their fees."};
AUTODATA(json_command, &getchannels_command);