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f76ff90485
Several daemons (onchaind, hsm) want to use the status messages, but don't communicate with peers. The coming changes made them drag in more code they didn't need, so instead we have a different non-overlapping type. We combine the status_received_errmsg and status_sent_errmsg into a single status_peer_error, with the presence or not of the 'error_for_them' field indicating direction. We also rename status_fatal_connection_lost() to peer_failed_connection_lost() to fit in. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
70 lines
2.4 KiB
C
70 lines
2.4 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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* @gossip_index: the gossip_index
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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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* @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, gossip_index, chanid, send_reply, \
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io_error, err_pkt, arg) \
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read_peer_msg_((ctx), PEER_FD, GOSSIP_FD, (cs), (gossip_index), \
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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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typesafe_cb_preargs(void, void *, (err_pkt), (arg), \
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int, int, \
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struct crypto_state *, \
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u64, const char *, \
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const struct channel_id *), \
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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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/* Helper: calls peer_failed_received_errmsg() */
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void status_fail_errpkt(int peer_fd, int gossip_fd,
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struct crypto_state *cs, u64 gossip_index,
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const char *desc,
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const struct channel_id *channel_id,
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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, u64 gossip_index,
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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 (*err_pkt)(int peer_fd, int gossip_fd,
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struct crypto_state *cs, u64 gossip_index,
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const char *desc,
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const struct channel_id *channel_id,
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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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