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Code complete for client side of journal protocol

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This commit is contained in:
jmjatlanta 2017-08-24 13:30:44 -05:00
parent 0bc975dfcf
commit 60c6085469
6 changed files with 113 additions and 31 deletions
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3
include/ipfs/journal/journal.h
View file

@ -44,7 +44,8 @@ struct Libp2pProtocolHandler* ipfs_journal_build_protocol_handler(const struct I
/***
* Send a journal message to a remote peer
* @param local_node the local node
* @param peer the peer to send it to
* @returns true(1) on success, false(0) otherwise.
*/
int ipfs_journal_sync(struct Libp2pPeer* peer);
int ipfs_journal_sync(struct IpfsNode* local_node, struct Libp2pPeer* peer);

2
include/ipfs/repo/fsrepo/journalstore.h
View file

@ -29,7 +29,7 @@ int repo_journalstore_cursor_get(struct Datastore* datastore, void* cursor, enum
/**
* Close the cursor
*/
int repo_cournalstore_cursor_close(struct Datastore* datastore, void* cursor);
int repo_journalstore_cursor_close(struct Datastore* datastore, void* cursor);
int journal_record_free(struct JournalRecord* rec);

2
journal/Makefile
View file

@ -1,5 +1,5 @@
CC = gcc
CFLAGS = -O0 -I../include -I../../c-libp2p/include -I../../c-multiaddr/include -I../../c-multihash/include -I../../c-protobuf -Wall -std=c99
CFLAGS = -O0 -I../include -I../../c-libp2p/include -I../../c-multiaddr/include -I../../c-multihash/include -I../../c-protobuf -I../../lmdb/libraries/liblmdb -Wall -std=c99
ifdef DEBUG
CFLAGS += -g3

115
journal/journal.c
View file

@ -1,8 +1,11 @@
/**
* The journal protocol attempts to keep a journal in sync with other (approved) nodes
*/
#include "libp2p/os/utils.h"
#include "ipfs/journal/journal.h"
#include "ipfs/journal/journal_message.h"
#include "ipfs/journal/journal_entry.h"
#include "ipfs/repo/fsrepo/journalstore.h"
/***
* See if we can handle this message
@ -58,32 +61,114 @@ struct Libp2pProtocolHandler* ipfs_journal_build_protocol_handler(const struct I
return handler;
}
/***
* Retrieve the last n records from the journalstore
* @param database the reference to the opened db
* @param n the number of records to retrieve
* @returns a vector of struct JournalRecord
*/
struct Libp2pVector* ipfs_journal_get_last(struct Datastore* database, int n) {
struct Libp2pVector* vector = libp2p_utils_vector_new(1);
if (vector != NULL) {
void* cursor;
if (!repo_journalstore_cursor_open(database, &cursor))
return NULL;
struct JournalRecord* rec = NULL;
if (!repo_journalstore_cursor_get(database, cursor, CURSOR_LAST, &rec)) {
libp2p_utils_vector_free(vector);
repo_journalstore_cursor_close(database, cursor);
return NULL;
}
// we've got one, now start the loop
int i = 0;
do {
libp2p_utils_vector_add(vector, rec);
if (!repo_journalstore_cursor_get(database, cursor, CURSOR_PREVIOUS, &rec)) {
break;
}
i++;
} while(i < n);
repo_journalstore_cursor_close(database, cursor);
}
return vector;
}
int ipfs_journal_free_records(struct Libp2pVector* records) {
if (records != NULL) {
for (int i = 0; i < records->total; i++) {
struct JournalRecord* rec = (struct JournalRecord*)libp2p_utils_vector_get(records, i);
journal_record_free(rec);
}
libp2p_utils_vector_free(records);
}
return 1;
}
int ipfs_journal_send_message(struct IpfsNode* node, struct Libp2pPeer* peer, struct JournalMessage* message) {
if (peer->connection_type != CONNECTION_TYPE_CONNECTED)
libp2p_peer_connect(&node->identity->private_key, peer, node->peerstore, 10);
if (peer->connection_type != CONNECTION_TYPE_CONNECTED)
return 0;
// protobuf the message
size_t msg_size = ipfs_journal_message_encode_size(message);
uint8_t msg[msg_size];
if (!ipfs_journal_message_encode(message, &msg[0], msg_size, &msg_size))
return 0;
// send the header
char* header = "/ipfs/journalio/1.0.0/n";
if (!peer->sessionContext->default_stream->write(peer->sessionContext->default_stream, (unsigned char*)header, strlen(header)))
return 0;
// send the message
return peer->sessionContext->default_stream->write(peer->sessionContext->default_stream, msg, msg_size);
}
/***
* Send a journal message to a remote peer
* @param peer the peer to send it to
* @returns true(1) on success, false(0) otherwise.
*/
int ipfs_journal_sync(struct Libp2pPeer* peer) {
int ipfs_journal_sync(struct IpfsNode* local_node, struct Libp2pPeer* peer) {
// make sure we're connected securely
if (peer->is_local)
return 0;
if (peer->sessionContext->secure_stream == NULL)
return 0;
/*
// grab the last 10 files
struct Libp2pVector* vector = libp2p_utils_vector_new(1);
if (vector == NULL) {
// grab the last 10? files
struct Libp2pVector* journal_records = ipfs_journal_get_last(local_node->repo->config->datastore, 10);
if (journal_records == NULL || journal_records->total == 0) {
// nothing to do
return 1;
}
// build the message
struct JournalMessage* message = ipfs_journal_message_new();
for(int i = 0; i < journal_records->total; i++) {
struct JournalRecord* rec = (struct JournalRecord*) libp2p_utils_vector_get(journal_records, i);
if (rec->timestamp > message->end_epoch)
message->end_epoch = rec->timestamp;
if (message->start_epoch == 0 || rec->timestamp < message->start_epoch)
message->start_epoch = rec->timestamp;
struct JournalEntry* entry = ipfs_journal_entry_new();
entry->timestamp = rec->timestamp;
entry->pin = 1;
entry->hash_size = rec->hash_size;
entry->hash = (uint8_t*) malloc(entry->hash_size);
if (entry->hash == NULL) {
// out of memory
ipfs_journal_message_free(message);
ipfs_journal_free_records(journal_records);
return 0;
}
ipfs_journal_get_last(10, &vector);
struct JournalMessage* message = NULL;
// build the message
if (!ipfs_journal_build_message(message))
return 0;
// protobuf the message
// send the protocol header
memcpy(entry->hash, rec->hash, entry->hash_size);
libp2p_utils_vector_add(message->journal_entries, entry);
}
// send the message
*/
return 0;
message->current_epoch = os_utils_gmtime();
int retVal = ipfs_journal_send_message(local_node, peer, message);
// clean up
ipfs_journal_message_free(message);
ipfs_journal_free_records(journal_records);
return retVal;
}

14
repo/fsrepo/lmdb_datastore.c
View file

@ -12,6 +12,7 @@
#include "lmdb.h"
#include "libp2p/utils/logger.h"
#include "libp2p/os/utils.h"
#include "ipfs/repo/fsrepo/lmdb_datastore.h"
#include "ipfs/repo/fsrepo/journalstore.h"
#include "varint.h"
@ -122,17 +123,6 @@ int repo_fsrepo_lmdb_get(const char* key, size_t key_size, unsigned char* data,
return 1;
}
/**
* Get the current time UTC
* @returns number of seconds since epoch in UTC
*/
unsigned long long lmdb_datastore_gmt_time() {
time_t local = time(NULL);
struct tm *gmt = gmtime(&local);
return (unsigned long long)mktime(gmt);
}
/**
* Write data to the datastore with the specified key
* @param key the key
@ -162,7 +152,7 @@ int repo_fsrepo_lmdb_put(unsigned const char* key, size_t key_size, unsigned cha
return 0;
// add the timestamp
unsigned long long timestamp = lmdb_datastore_gmt_time();
unsigned long long timestamp = os_utils_gmtime();
uint8_t *record;
size_t record_size;
repo_fsrepo_lmdb_build_record(timestamp, data, data_size, &record, &record_size);

8
repo/fsrepo/lmdb_journalstore.c
View file

@ -100,10 +100,16 @@ int repo_journalstore_cursor_get(struct Datastore* datastore, void* crsr, enum D
MDB_val mdb_key;
MDB_val mdb_value;
MDB_cursor_op co = MDB_FIRST;
if (op == CURSOR_FIRST)
co = MDB_FIRST;
else if (op == CURSOR_NEXT)
co = MDB_NEXT;
else if (op == CURSOR_LAST)
co = MDB_LAST;
else if (op == CURSOR_PREVIOUS)
co = MDB_PREV;
if (mdb_cursor_get(tc->cursor, &mdb_key, &mdb_value, co) != 0) {
return 0;
}
@ -126,7 +132,7 @@ int repo_journalstore_cursor_get(struct Datastore* datastore, void* crsr, enum D
/**
* Close the cursor
*/
int repo_cournalstore_cursor_close(struct Datastore* datastore, void* crsr) {
int repo_journalstore_cursor_close(struct Datastore* datastore, void* crsr) {
if (crsr != NULL) {
struct lmdb_trans_cursor* cursor = (struct lmdb_trans_cursor*)crsr;
if (cursor->cursor != NULL) {