89 lines
2.9 KiB
C
89 lines
2.9 KiB
C
#pragma once
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#include "libp2p/utils/linked_list.h"
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#include "libp2p/peer/peer.h"
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/**
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* Structures and functions to implement a storage area for peers and
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* their connections and metadata
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*/
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/**
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* An entry in the "database" is a PeerEntry. This contains metadata
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* about the peer
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*/
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struct PeerEntry {
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struct Libp2pPeer* peer;
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// other metadata for the peer goes here
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// TODO: add some type of timer to expire the record
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};
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/**
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* Contains a collection of peers and their metadata
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* NOTE: this is currently a linked list. Perhaps a better algo would
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* improve performance, but will wait.
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*/
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struct Peerstore {
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struct Libp2pLinkedList* head_entry;
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struct Libp2pLinkedList* last_entry;
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};
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struct PeerEntry* libp2p_peer_entry_new();
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void libp2p_peer_entry_free(struct PeerEntry* in);
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/**
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* Creates a new empty peerstore
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* @param local_peer the local peer
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* @returns an empty peerstore or NULL on error
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*/
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struct Peerstore* libp2p_peerstore_new(const struct Libp2pPeer* local_peer);
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/**
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* Deallocate resources used by the peerstore
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* @param in the struct to deallocate
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* @returns true(1) on success, otherwise false(0)
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*/
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int libp2p_peerstore_free(struct Peerstore* in);
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/**
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* Add a Peer to the Peerstore
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* @param peerstore the peerstore to add the entry to
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* @param peer_entry the entry to add
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* @returns true(1) on success, otherwise false
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*/
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int libp2p_peerstore_add_peer_entry(struct Peerstore* peerstore, struct PeerEntry* peer_entry);
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/***
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* Add a peer to the peerstore
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* @param peerstore the peerstore to add the entry to
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* @param peer the peer to add (will be wrapped in PeerEntry struct)
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* @returns true(1) on success, otherwise false
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*/
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int libp2p_peerstore_add_peer(struct Peerstore* peerstore, const struct Libp2pPeer* peer);
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/**
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* Retrieve a peer from the peerstore based on the peer id
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* @param peerstore the peerstore to search
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* @param peer_id the id to search for as a binary array
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* @param peer_id_size the size of the binary array
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* @returns the PeerEntry struct if found, otherwise NULL
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*/
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struct PeerEntry* libp2p_peerstore_get_peer_entry(struct Peerstore* peerstore, const unsigned char* peer_id, size_t peer_id_size);
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/**
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* Retrieve a peer from the peerstore based on the peer id
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* @param peerstore the peerstore to search
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* @param peer_id the id to search for as a binary array
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* @param peer_id_size the size of the binary array
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* @returns the Libp2pPeer struct if found, otherwise NULL
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*/
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struct Libp2pPeer* libp2p_peerstore_get_peer(struct Peerstore* peerstore, const unsigned char* peer_id, size_t peer_id_size);
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/**
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* Look for this peer in the peerstore. If it is found, return a reference to that object.
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* If it is not found, add it, and return a reference to the new copy
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* @param peerstore the peerstore to search
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* @param in the peer to search for
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*/
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struct Libp2pPeer* libp2p_peerstore_get_or_add_peer(struct Peerstore* peerstore, const struct Libp2pPeer* in);
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