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.
 
 
 
 
 
 

90 lines
2.1 KiB

#include <common/ping.h>
#include <common/status.h>
#include <common/version.h>
#include <wire/gen_peer_wire.h>
bool check_ping_make_pong(const tal_t *ctx, const u8 *ping, u8 **pong)
{
u16 num_pong_bytes;
u8 *ignored;
if (!fromwire_ping(ctx, ping, &num_pong_bytes, &ignored))
return false;
tal_free(ignored);
/* FIXME: */
/* BOLT #1:
*
* A node receiving a `ping` message:
* - SHOULD fail the channels if it has received significantly in
* excess of one `ping` per 30 seconds.
*/
/* BOLT #1:
*
* A node receiving a `ping` message:
*...
* - if `num_pong_bytes` is less than 65532:
* - MUST respond by sending a `pong` message, with `byteslen` equal
* to `num_pong_bytes`.
* - otherwise (`num_pong_bytes` is **not** less than 65532):
* - MUST ignore the `ping`.
*/
if (num_pong_bytes < 65532) {
/* BOLT #1:
*
* A node sending a `pong` message:
* - SHOULD set `ignored` to 0s.
* - MUST NOT set `ignored` to sensitive data such as secrets
* or portions of initialized memory.
*/
ignored = tal_arrz(ctx, u8, num_pong_bytes);
#if DEVELOPER
/* Embed version */
strncpy((char *)ignored, version(), num_pong_bytes);
#endif
*pong = towire_pong(ctx, ignored);
tal_free(ignored);
} else
*pong = NULL;
return true;
}
u8 *make_ping(const tal_t *ctx, u16 num_pong_bytes, u16 padlen)
{
/* BOLT #1:
*
* A node sending a `ping` message:
* - SHOULD set `ignored` to 0s.
* - MUST NOT set `ignored` to sensitive data such as secrets or
* portions of initialized memory.
*/
u8 *ping, *ignored = tal_arrz(ctx, u8, padlen);
ping = towire_ping(ctx, num_pong_bytes, ignored);
tal_free(ignored);
return ping;
}
const char *got_pong(const u8 *pong, size_t *num_pings_outstanding)
{
u8 *ignored;
int i;
if (!fromwire_pong(pong, pong, &ignored))
return "Bad pong";
if (*num_pings_outstanding == 0)
return "Unexpected pong";
for (i = 0; i < tal_count(ignored); i++) {
if (ignored[i] < ' ' || ignored[i] == 127)
break;
}
status_debug("Got pong %zu bytes (%.*s...)",
tal_count(ignored), i, (char *)ignored);
(*num_pings_outstanding)--;
return NULL;
}