58 lines
2.1 KiB
C
58 lines
2.1 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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* @channel_id: 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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* @err_pkt: what to do if there's an error packet (eg. status_fail_errorpkt)
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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, channel_id, send_reply, io_error, err_pkt, arg) \
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read_peer_msg_((ctx), PEER_FD, GOSSIP_FD, (cs), (channel_id), \
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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_preargs(void, void *, (io_error), (arg), \
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const char *), \
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typesafe_cb_preargs(void, void *, (err_pkt), (arg), \
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const char *, bool), \
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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 status_failed(STATUS_FAIL_PEER_IO) */
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void status_fail_io(const char *what_i_was_doing, void *unused);
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/* Helper: calls status_failed(STATUS_FAIL_PEER_BAD, <error>) */
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void status_fail_errpkt(const char *desc, bool this_channel_only, void *unused);
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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)(const char *what_i_was_doing, void *arg),
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void (*err_pkt)(const char *desc, bool this_channel_only,
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void *arg),
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void *arg);
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#endif /* LIGHTNING_COMMON_READ_PEER_MSG_H */
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