57 lines
1.4 KiB
C
57 lines
1.4 KiB
C
#include "config.h"
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#include <common/ping.h>
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#include <common/status.h>
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#include <common/version.h>
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#include <wire/peer_wire.h>
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bool check_ping_make_pong(const tal_t *ctx, const u8 *ping, u8 **pong)
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{
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u16 num_pong_bytes;
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u8 *ignored;
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if (!fromwire_ping(ctx, ping, &num_pong_bytes, &ignored))
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return false;
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tal_free(ignored);
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/* BOLT #1:
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*
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* A node receiving a `ping` message:
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* - if `num_pong_bytes` is less than 65532:
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* - MUST respond by sending a `pong` message, with `byteslen` equal
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* to `num_pong_bytes`.
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* - otherwise (`num_pong_bytes` is **not** less than 65532):
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* - MUST ignore the `ping`.
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*/
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if (num_pong_bytes < 65532) {
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/* BOLT #1:
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*
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* A node sending a `pong` message:
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* - SHOULD set `ignored` to 0s.
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* - MUST NOT set `ignored` to sensitive data such as secrets
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* or portions of initialized memory.
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*/
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ignored = tal_arrz(ctx, u8, num_pong_bytes);
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*pong = towire_pong(ctx, ignored);
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tal_free(ignored);
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} else
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*pong = NULL;
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return true;
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}
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u8 *make_ping(const tal_t *ctx, u16 num_pong_bytes, u16 padlen)
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{
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/* BOLT #1:
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*
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* A node sending a `ping` message:
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* - SHOULD set `ignored` to 0s.
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* - MUST NOT set `ignored` to sensitive data such as secrets or
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* portions of initialized memory.
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*/
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u8 *ping, *ignored = tal_arrz(ctx, u8, padlen);
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ping = towire_ping(ctx, num_pong_bytes, ignored);
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tal_free(ignored);
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return ping;
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}
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