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139 lines
3.4 KiB
C
139 lines
3.4 KiB
C
#ifndef LLARP_NODEDB_H
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#define LLARP_NODEDB_H
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#include <llarp/common.h>
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#include <llarp/crypto.h>
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#include <llarp/router_contact.h>
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/**
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* nodedb.h
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*
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* persistent storage API for router contacts
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*/
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struct llarp_nodedb;
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/// create an empty nodedb
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struct llarp_nodedb *
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llarp_nodedb_new(struct llarp_crypto *crypto);
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/// free a nodedb and all loaded rc
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void
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llarp_nodedb_free(struct llarp_nodedb **n);
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/// ensure a nodedb fs skiplist structure is at dir
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/// create if not there.
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bool
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llarp_nodedb_ensure_dir(const char *dir);
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/// load entire nodedb from fs skiplist at dir
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ssize_t
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llarp_nodedb_load_dir(struct llarp_nodedb *n, const char *dir);
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/// store entire nodedb to fs skiplist at dir
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ssize_t
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llarp_nodedb_store_dir(struct llarp_nodedb *n, const char *dir);
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struct llarp_nodedb_iter
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{
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void *user;
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struct llarp_rc *rc;
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size_t index;
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bool (*visit)(struct llarp_nodedb_iter *);
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};
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/// iterate over all loaded rc with an iterator
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int
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llarp_nodedb_iterate_all(struct llarp_nodedb *n, struct llarp_nodedb_iter i);
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/// get a random rc that is loaded
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void
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llarp_nodedb_get_random_rc(struct llarp_nodedb *n, struct llarp_rc *result);
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/// select a random rc at hop number N
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void
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llarp_nodedb_select_random_hop(struct llarp_nodedb *n, struct llarp_rc *prev,
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struct llarp_rc *result, size_t N);
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/// return number of RC loaded
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size_t
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llarp_nodedb_num_loaded(struct llarp_nodedb *n);
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/**
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put an rc into the node db
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overwrites with new contents if already present
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flushes the single entry to disk
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returns true on success and false on error
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*/
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bool
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llarp_nodedb_put_rc(struct llarp_nodedb *n, struct llarp_rc *rc);
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/// return a pointer to an already loaded RC or nullptr if it's not there
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struct llarp_rc *
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llarp_nodedb_get_rc(struct llarp_nodedb *n, const byte_t *pk);
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/// struct for async rc verification
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struct llarp_async_verify_rc;
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typedef void (*llarp_async_verify_rc_hook_func)(struct llarp_async_verify_rc *);
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/// verify rc request
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struct llarp_async_verify_rc
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{
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/// async_verify_context
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void *user;
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/// nodedb storage
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struct llarp_nodedb *nodedb;
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// llarp_logic for llarp_logic_queue_job
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struct llarp_logic *logic; // includes a llarp_threadpool
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// struct llarp_crypto *crypto; // probably don't need this because we have
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// it in the nodedb
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struct llarp_threadpool *cryptoworker;
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struct llarp_threadpool *diskworker;
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/// router contact
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struct llarp_rc rc;
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/// result
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bool valid;
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/// hook
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llarp_async_verify_rc_hook_func hook;
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};
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/**
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struct for async rc verification
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data is loaded in disk io threadpool
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crypto is done on the crypto worker threadpool
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result is called on the logic thread
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*/
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void
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llarp_nodedb_async_verify(struct llarp_async_verify_rc *job);
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struct llarp_async_load_rc;
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typedef void (*llarp_async_load_rc_hook_func)(struct llarp_async_load_rc *);
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struct llarp_async_load_rc
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{
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/// async_verify_context
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void *user;
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/// nodedb storage
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struct llarp_nodedb *nodedb;
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/// llarp_logic for calling hook
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struct llarp_logic *logic;
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/// disk worker threadpool
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struct llarp_threadpool *diskworker;
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/// target pubkey
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byte_t pubkey[PUBKEYSIZE];
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/// router contact result
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struct llarp_rc rc;
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/// set to true if we loaded the rc
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bool loaded;
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/// hook function called in logic thread
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llarp_async_load_rc_hook_func hook;
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};
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/// asynchronously load an rc from disk
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void
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llarp_nodedb_async_load_rc(struct llarp_async_load_rc *job);
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#endif
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