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DEBUG:root:lightningd(16333): 2018-02-08T02:12:21.158Z lightningd(8262): lightning_openingd(0382ce59ebf18be7d84677c2e35f23294b9992ceca95491fcf8a56c6cb2d9de199): Failed hdr decrypt with rn=2 We only hand off the peer if we've not started writing, but that was insufficient: we increment the sn twice on encrypting packet, so there's a window before we've actually started writing where this is now wrong. The simplest fix is only to hand off from master when we've just written, and have the read-packet path simply wake the write-packet path. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
55 lines
1.7 KiB
C
55 lines
1.7 KiB
C
#ifndef LIGHTNING_COMMON_CRYPTOMSG_H
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#define LIGHTNING_COMMON_CRYPTOMSG_H
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#include "config.h"
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#include <ccan/short_types/short_types.h>
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#include <ccan/tal/tal.h>
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#include <common/crypto_state.h>
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struct io_conn;
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struct peer;
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struct peer_crypto_state {
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struct crypto_state cs;
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/* Peer who owns us: peer->crypto_state == this */
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struct peer *peer;
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/* Where we are up to in reading (we do in two parts). */
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bool reading_body;
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/* Output and input buffers. */
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u8 *out, *in;
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struct io_plan *(*next_in)(struct io_conn *, struct peer *, u8 *);
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struct io_plan *(*next_out)(struct io_conn *, struct peer *);
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};
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/* Initializes peer->cs (still need to read in cs->cs) */
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void init_peer_crypto_state(struct peer *peer, struct peer_crypto_state *pcs);
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/* Get decrypted message: ignores unknown odd messages. */
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struct io_plan *peer_read_message(struct io_conn *conn,
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struct peer_crypto_state *cs,
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struct io_plan *(*next)(struct io_conn *,
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struct peer *,
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u8 *msg));
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/* Have we already started reading a message? */
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bool peer_in_started(const struct io_conn *conn,
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const struct peer_crypto_state *cs);
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/* Sends message: frees if taken(msg). */
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struct io_plan *peer_write_message(struct io_conn *conn,
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struct peer_crypto_state *cs,
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const u8 *msg,
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struct io_plan *(*next)(struct io_conn *,
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struct peer *));
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/* Low-level functions for sync comms: doesn't discard unknowns! */
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u8 *cryptomsg_encrypt_msg(const tal_t *ctx,
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struct crypto_state *cs,
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const u8 *msg);
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bool cryptomsg_decrypt_header(struct crypto_state *cs, u8 hdr[18], u16 *lenp);
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u8 *cryptomsg_decrypt_body(const tal_t *ctx,
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struct crypto_state *cs, const u8 *in);
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#endif /* LIGHTNING_COMMON_CRYPTOMSG_H */
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