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87 lines
3.2 KiB
C
87 lines
3.2 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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struct crypto_state;
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struct channel_id;
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/**
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* peer_or_gossip_sync_read - read a peer message, or maybe a gossip msg.
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* @ctx: context to allocate return packet from.
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* @peer_fd, @gossip_fd: peer and gossip fd.
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* @cs: the cryptostate (updated)
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* @from_gossipd: true if the msg was from gossipd, otherwise false.
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*
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* Will call peer_failed_connection_lost() or
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* status_failed(STATUS_FAIL_GOSSIP_IO) or return a message.
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*
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* Usually, you should call handle_gossip_msg if *@from_gossipd is
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* true, otherwise if is_peer_error() handle the error, otherwise if
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* is_msg_for_gossipd() then send to gossipd, otherwise if is
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* is_wrong_channel() send that as a reply. Otherwise it should be
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* a valid message.
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*/
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u8 *peer_or_gossip_sync_read(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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bool *from_gossipd);
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/**
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* is_peer_error - if it's an error, describe if it applies to this channel.
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* @ctx: context to allocate return from.
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* @msg: the peer message.
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* @channel_id: the channel id of the current channel.
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* @desc: set to non-NULL if this describes a channel we care about.
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* @all_channels: set to true if this applies to all channels.
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*
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* If @desc is NULL, ignore this message. Otherwise, that's usually passed
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* to peer_failed_received_errmsg().
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*/
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bool is_peer_error(const tal_t *ctx, const u8 *msg,
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const struct channel_id *channel_id,
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char **desc, bool *all_channels);
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/**
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* is_wrong_channel - if it's a message about a different channel, return true
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* @msg: the peer message.
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* @channel_id: the channel id of the current channel.
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* @actual: set to the actual channel id if this returns false.
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*
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* Note that this only handles some message types, returning false for others.
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*/
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bool is_wrong_channel(const u8 *msg, const struct channel_id *expected,
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struct channel_id *actual);
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/**
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* handle_peer_gossip_or_error - simple handler for all the above cases.
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* @peer_fd, @gossip_fd, @gossip_store_fd: peer, gossip and gossip_store fds.
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* @cs: the cryptostate (updated)
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* @channel_id: the channel id of the current channel.
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* @msg: the peer message (only taken if returns true).
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*
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* This returns true if it handled the packet: a gossip packet (forwarded
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* to gossipd), an error packet (causes peer_failed_received_errmsg or
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* ignored), or a message about the wrong channel (sends sync error reply).
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*/
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bool handle_peer_gossip_or_error(int peer_fd, int gossip_fd, int gossip_store_fd,
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struct crypto_state *cs,
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const struct channel_id *channel_id,
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const u8 *msg TAKES);
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/* We got this message from gossipd: forward/quit as it asks. */
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void handle_gossip_msg(int peer_fd,
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int gossip_store_fd,
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struct crypto_state *cs,
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const u8 *msg TAKES);
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/**
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* new_gossip_store - handle replacement gossip_store_fd.
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* @gossip_store_fd: our fixed fd we expect to use to read gossip_store.
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* @new_gossip_store_fd: fd received from gossipd.
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*/
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void new_gossip_store(int gossip_store_fd, int new_gossip_store_fd);
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#endif /* LIGHTNING_COMMON_READ_PEER_MSG_H */
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