mirror of
https://github.com/ElementsProject/lightning.git
synced 2024-11-19 09:54:16 +01:00
138 lines
3.5 KiB
C
138 lines
3.5 KiB
C
#include <channeld/channeld_wiregen.h>
|
|
#include <common/json_command.h>
|
|
#include <common/jsonrpc_errors.h>
|
|
#include <common/param.h>
|
|
#include <common/sphinx.h>
|
|
#include <common/utils.h>
|
|
#include <gossipd/gossipd_wiregen.h>
|
|
#include <lightningd/htlc_end.h>
|
|
#include <lightningd/json.h>
|
|
#include <lightningd/jsonrpc.h>
|
|
#include <lightningd/lightningd.h>
|
|
#include <lightningd/log.h>
|
|
#include <lightningd/peer_control.h>
|
|
#include <lightningd/ping.h>
|
|
#include <lightningd/subd.h>
|
|
|
|
struct ping_command {
|
|
struct list_node list;
|
|
struct node_id id;
|
|
struct command *cmd;
|
|
};
|
|
|
|
static struct ping_command *find_ping_cmd(struct lightningd *ld,
|
|
const struct node_id *id)
|
|
{
|
|
struct ping_command *i;
|
|
|
|
list_for_each(&ld->ping_commands, i, list) {
|
|
if (node_id_eq(id, &i->id))
|
|
return i;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static void destroy_ping_command(struct ping_command *pc)
|
|
{
|
|
list_del(&pc->list);
|
|
}
|
|
|
|
static struct ping_command *new_ping_command(const tal_t *ctx,
|
|
struct lightningd *ld,
|
|
const struct node_id *peer_id,
|
|
struct command *cmd)
|
|
{
|
|
struct ping_command *pc = tal(ctx, struct ping_command);
|
|
|
|
pc->id = *peer_id;
|
|
pc->cmd = cmd;
|
|
list_add_tail(&ld->ping_commands, &pc->list);
|
|
tal_add_destructor(pc, destroy_ping_command);
|
|
|
|
return pc;
|
|
}
|
|
|
|
void ping_reply(struct subd *subd, const u8 *msg)
|
|
{
|
|
u16 totlen;
|
|
bool ok, sent = true;
|
|
struct node_id id;
|
|
struct ping_command *pc;
|
|
|
|
log_debug(subd->ld->log, "Got ping reply!");
|
|
ok = fromwire_gossipd_ping_reply(msg, &id, &sent, &totlen);
|
|
|
|
pc = find_ping_cmd(subd->ld, &id);
|
|
assert(pc);
|
|
|
|
if (!ok)
|
|
was_pending(command_fail(pc->cmd, LIGHTNINGD,
|
|
"Bad reply message"));
|
|
else if (!sent)
|
|
was_pending(command_fail(pc->cmd, LIGHTNINGD, "Unknown peer"));
|
|
else {
|
|
struct json_stream *response = json_stream_success(pc->cmd);
|
|
|
|
json_add_num(response, "totlen", totlen);
|
|
was_pending(command_success(pc->cmd, response));
|
|
}
|
|
}
|
|
|
|
static struct command_result *json_ping(struct command *cmd,
|
|
const char *buffer,
|
|
const jsmntok_t *obj UNNEEDED,
|
|
const jsmntok_t *params)
|
|
{
|
|
u8 *msg;
|
|
unsigned int *len, *pongbytes;
|
|
struct node_id *id;
|
|
|
|
if (!param(cmd, buffer, params,
|
|
p_req("id", param_node_id, &id),
|
|
p_opt_def("len", param_number, &len, 128),
|
|
p_opt_def("pongbytes", param_number, &pongbytes, 128),
|
|
NULL))
|
|
return command_param_failed();
|
|
|
|
/* BOLT #1:
|
|
*
|
|
* 1. `type`: a 2-byte big-endian field indicating the type of message
|
|
* 2. `payload`: ...
|
|
* The size of the message is required by the transport layer to fit
|
|
* into a 2-byte unsigned int; therefore, the maximum possible size is
|
|
* 65535 bytes.
|
|
*...
|
|
* 1. type: 18 (`ping`)
|
|
* 2. data:
|
|
* * [`u16`:`num_pong_bytes`]
|
|
* * [`u16`:`byteslen`]
|
|
* * [`byteslen*byte`:`ignored`]
|
|
*/
|
|
if (*len > 65535 - 2 - 2 - 2) {
|
|
return command_fail(cmd, JSONRPC2_INVALID_PARAMS,
|
|
"%u would result in oversize ping", *len);
|
|
}
|
|
|
|
/* Note that > 65531 is valid: it means "no pong reply" */
|
|
if (*pongbytes > 65535) {
|
|
return command_fail(cmd, JSONRPC2_INVALID_PARAMS,
|
|
"pongbytes %u > 65535", *pongbytes);
|
|
}
|
|
|
|
/* parent is cmd, so when we complete cmd, we free this. */
|
|
new_ping_command(cmd, cmd->ld, id, cmd);
|
|
|
|
/* gossipd handles all pinging, even if it's in another daemon. */
|
|
msg = towire_gossipd_ping(NULL, id, *pongbytes, *len);
|
|
subd_send_msg(cmd->ld->gossip, take(msg));
|
|
return command_still_pending(cmd);
|
|
}
|
|
|
|
static const struct json_command ping_command = {
|
|
"ping",
|
|
"network",
|
|
json_ping,
|
|
"Send peer {id} a ping of length {len} (default 128) asking for {pongbytes} (default 128)"
|
|
};
|
|
AUTODATA(json_command, &ping_command);
|