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#ifndef LIGHTNING_COMMON_READ_PEER_MSG_H
#define LIGHTNING_COMMON_READ_PEER_MSG_H
#include "config.h"
#include <ccan/short_types/short_types.h>
#include <ccan/tal/tal.h>
struct crypto_state;
struct channel_id;
struct per_peer_state;
/**
* peer_or_gossip_sync_read - read a peer message, or maybe a gossip msg.
* @ctx: context to allocate return packet from.
* @pps: the per-peer peer state and fds
* @from_gossipd: true if the msg was from gossipd, otherwise false.
*
* Will call peer_failed_connection_lost() or
* status_failed(STATUS_FAIL_GOSSIP_IO) or return a message.
*
* Usually, you should call handle_gossip_msg if *@from_gossipd is
* true, otherwise if is_peer_error() handle the error, otherwise if
* is_msg_for_gossipd() then send to gossipd, otherwise if is
* is_wrong_channel() send that as a reply. Otherwise it should be
* a valid message.
*/
u8 *peer_or_gossip_sync_read(const tal_t *ctx,
struct per_peer_state *pps,
bool *from_gossipd);
/**
* is_peer_error - if it's an error, describe if it applies to this channel.
* @ctx: context to allocate return from.
* @msg: the peer message.
* @channel_id: the channel id of the current channel.
* @desc: set to non-NULL if this describes a channel we care about.
* @all_channels: set to true if this applies to all channels.
*
* If @desc is NULL, ignore this message. Otherwise, that's usually passed
* to peer_failed_received_errmsg().
*/
bool is_peer_error(const tal_t *ctx, const u8 *msg,
const struct channel_id *channel_id,
char **desc, bool *all_channels);
/**
* is_wrong_channel - if it's a message about a different channel, return true
* @msg: the peer message.
* @channel_id: the channel id of the current channel.
* @actual: set to the actual channel id if this returns false.
*
* Note that this only handles some message types, returning false for others.
*/
bool is_wrong_channel(const u8 *msg, const struct channel_id *expected,
struct channel_id *actual);
/**
* handle_peer_gossip_or_error - simple handler for all the above cases.
* @pps: per-peer state.
* @channel_id: the channel id of the current channel.
* @msg: the peer message (only taken if returns true).
*
* This returns true if it handled the packet: a gossip packet (forwarded
* to gossipd), an error packet (causes peer_failed_received_errmsg or
* ignored), or a message about the wrong channel (sends sync error reply).
*/
bool handle_peer_gossip_or_error(struct per_peer_state *pps,
const struct channel_id *channel_id,
const u8 *msg TAKES);
/**
* handle_timestamp_filter - deal with timestamp filter requests.
* @pps: per-peer state.
* @msg: the peer message (only taken if returns true).
*/
bool handle_timestamp_filter(struct per_peer_state *pps, const u8 *msg TAKES);
/* We got this message from gossipd: forward/quit as it asks. */
void handle_gossip_msg(struct per_peer_state *pps, const u8 *msg TAKES);
#endif /* LIGHTNING_COMMON_READ_PEER_MSG_H */