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b68fb24758
This means that openingd and closingd now forward our gossip. But the real reason we want to do this is that it gives an easy way for gossipd to kill any active daemon, by closing its fd: previously closingd and openingd didn't read the fd, so tended not to notice. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
67 lines
2.2 KiB
C
67 lines
2.2 KiB
C
#ifndef LIGHTNING_COMMON_READ_PEER_MSG_H
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#define LIGHTNING_COMMON_READ_PEER_MSG_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 <ccan/typesafe_cb/typesafe_cb.h>
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struct crypto_state;
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struct channel_id;
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/**
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* read_peer_msg - read & decode in a peer message, handling common ones.
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* @ctx: context to allocate return packet from.
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* @cs: the cryptostate (updated)
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* @chanid: the channel id (for identifying errors)
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* @send_reply: the way to send a reply packet (eg. sync_crypto_write_arg)
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* @io_error: what to do if there's an IO error (eg. status_fail_io)
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* (MUST NOT RETURN!)
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*
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* This returns NULL if it handled the message, so it's normally called in
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* a loop.
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*/
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#define read_peer_msg(ctx, cs, chanid, send_reply, io_error, arg) \
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read_peer_msg_((ctx), PEER_FD, GOSSIP_FD, (cs), \
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(chanid), \
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typesafe_cb_preargs(bool, void *, (send_reply), (arg), \
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struct crypto_state *, int, \
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const u8 *), \
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typesafe_cb(void, void *, (io_error), (arg)), \
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arg)
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/* Helper: sync_crypto_write, with extra args it ignores */
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bool sync_crypto_write_arg(struct crypto_state *cs, int fd, const u8 *TAKES,
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void *unused);
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/* Helper: calls peer_failed_connection_lost. */
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void status_fail_io(void *unused);
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/* Handler for a gossip msg; used by channeld since it queues them. */
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#define handle_gossip_msg(msg, cs, send_reply, io_error, arg) \
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handle_gossip_msg_((msg), PEER_FD, (cs), \
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typesafe_cb_preargs(bool, void *, \
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(send_reply), (arg), \
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struct crypto_state *, int, \
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const u8 *), \
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typesafe_cb(void, void *, (io_error), (arg)), \
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arg)
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void handle_gossip_msg_(const u8 *msg TAKES,
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int peer_fd,
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struct crypto_state *cs,
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bool (*send_msg)(struct crypto_state *cs, int fd,
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const u8 *TAKES, void *arg),
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void (*io_error)(void *arg),
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void *arg);
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u8 *read_peer_msg_(const tal_t *ctx,
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int peer_fd, int gossip_fd,
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struct crypto_state *cs,
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const struct channel_id *channel,
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bool (*send_reply)(struct crypto_state *cs, int fd,
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const u8 *TAKES, void *arg),
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void (*io_error)(void *arg),
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void *arg);
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#endif /* LIGHTNING_COMMON_READ_PEER_MSG_H */
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