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#ifndef LIGHTNING_LIGHTNINGD_PEER_CONTROL_H
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#define LIGHTNING_LIGHTNINGD_PEER_CONTROL_H
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#include "config.h"
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#include <ccan/compiler/compiler.h>
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#include <ccan/crypto/shachain/shachain.h>
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#include <ccan/list/list.h>
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#include <common/channel_config.h>
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#include <common/htlc.h>
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#include <common/json.h>
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#include <common/wireaddr.h>
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#include <lightningd/channel.h>
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#include <lightningd/channel_state.h>
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#include <stdbool.h>
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#include <wallet/wallet.h>
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#include <wire/peer_wire.h>
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struct crypto_state;
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struct peer {
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/* Inside ld->peers. */
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struct list_node list;
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/* Master context */
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struct lightningd *ld;
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/* Database ID of the peer */
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u64 dbid;
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/* ID of peer */
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struct pubkey id;
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/* Our channels */
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struct list_head channels;
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/* Our (only) uncommitted channel, still opening. */
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struct uncommitted_channel *uncommitted_channel;
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/* History */
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struct log_book *log_book;
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/* Where we connected to, or it connected from. */
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struct wireaddr_internal addr;
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/* We keep a copy of their feature bits */
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const u8 *localfeatures, *globalfeatures;
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/* If we open a channel our direction will be this */
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u8 direction;
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#if DEVELOPER
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/* Swallow incoming HTLCs (for testing) */
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bool ignore_htlcs;
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#endif
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};
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struct peer *find_peer_by_dbid(struct lightningd *ld, u64 dbid);
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struct peer *new_peer(struct lightningd *ld, u64 dbid,
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const struct pubkey *id,
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const struct wireaddr_internal *addr);
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/* Last one out deletes peer. Also removes from db. */
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void maybe_delete_peer(struct peer *peer);
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struct peer *peer_by_id(struct lightningd *ld, const struct pubkey *id);
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struct peer *peer_from_json(struct lightningd *ld,
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const char *buffer,
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const jsmntok_t *peeridtok);
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gossipd: rewrite to do the handshake internally.
Now the flow is much simpler from a lightningd POV:
1. If we want to connect to a peer, just send gossipd `gossipctl_reach_peer`.
2. Every new peer, gossipd hands up to lightningd, with global/local features
and the peer fd and a gossip fd using `gossip_peer_connected`
3. If lightningd doesn't want it, it just hands the peerfd and global/local
features back to gossipd using `gossipctl_handle_peer`
4. If a peer sends a non-gossip msg (eg `open_channel`) the gossipd sends
it up using `gossip_peer_nongossip`.
5. If lightningd wants to fund a channel, it simply calls `release_channel`.
Notes:
* There's no more "unique_id": we use the peer id.
* For the moment, we don't ask gossipd when we're told to list peers, so
connected peers without a channel don't appear in the JSON getpeers API.
* We add a `gossipctl_peer_addrhint` for the moment, so you can connect to
a specific ip/port, but using other sources is a TODO.
* We now (correctly) only give up on reaching a peer after we exchange init
messages, which changes the test_disconnect case.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
7 years ago
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void peer_connected(struct lightningd *ld, const u8 *msg,
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int peer_fd, int gossip_fd);
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/* Could be configurable. */
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#define OUR_CHANNEL_FLAGS CHANNEL_FLAGS_ANNOUNCE_CHANNEL
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void channel_errmsg(struct channel *channel,
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int peer_fd, int gossip_fd,
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const struct crypto_state *cs,
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const struct channel_id *channel_id,
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const char *desc,
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const u8 *err_for_them);
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u8 *p2wpkh_for_keyidx(const tal_t *ctx, struct lightningd *ld, u64 keyidx);
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/* We've loaded peers from database, set them going. */
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void activate_peers(struct lightningd *ld);
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void drop_to_chain(struct lightningd *ld, struct channel *channel, bool cooperative);
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void channel_watch_funding(struct lightningd *ld, struct channel *channel);
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/* Pull peers, channels and HTLCs from db, and wire them up. */
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void load_channels_from_wallet(struct lightningd *ld);
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#if DEVELOPER
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void peer_dev_memleak(struct command *cmd);
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#endif /* DEVELOPER */
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#endif /* LIGHTNING_LIGHTNINGD_PEER_CONTROL_H */
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