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More bitswap implementation

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This commit is contained in:
John Jones 2017-07-31 06:43:15 -05:00
parent b3bb857f3a
commit 059a3286c9
14 changed files with 194 additions and 24 deletions
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2
cid/cid.c
View file

@ -22,7 +22,7 @@ size_t ipfs_cid_protobuf_encode_size(struct Cid* cid) {
return 0;
}
int ipfs_cid_protobuf_encode(struct Cid* cid, unsigned char* buffer, size_t buffer_length, size_t* bytes_written) {
int ipfs_cid_protobuf_encode(const struct Cid* cid, unsigned char* buffer, size_t buffer_length, size_t* bytes_written) {
size_t bytes_used;
*bytes_written = 0;
int retVal = 0;

4
core/null.c
View file

@ -149,8 +149,8 @@ void ipfs_null_connection (void *ptr)
break;
}
if (!session->default_stream->read(session, &results, &bytes_read, DEFAULT_NETWORK_TIMEOUT) ) {
// the read was unsuccessful. We should close the connection.
libp2p_logger_debug("null", "%s stream transaction read returned false.\n", connection_param->local_node->identity->peer_id);
// the read was unsuccessful wait a sec
sleep(1);
continue;
}
if (null_shutting_down) {

54
exchange/bitswap/message.c
View file

@ -638,5 +638,59 @@ int ipfs_bitswap_message_protobuf_decode(unsigned char* buffer, size_t buffer_le
return 1;
}
/****
* Add a vector of Cids to the bitswap message
* @param message the message
* @param cids a Libp2pVector of cids
* @returns true(1) on success, otherwise false(0)
*/
int ipfs_bitswap_message_add_wantlist_items(struct BitswapMessage* message, struct Libp2pVector* cids) {
if (message->wantlist == NULL) {
message->wantlist = ipfs_bitswap_wantlist_new();
if (message->wantlist == NULL)
return 0;
}
if (message->wantlist->entries == NULL) {
message->wantlist->entries = libp2p_utils_vector_new(1);
if (message->wantlist->entries == NULL)
return 0;
}
for(int i = 0; i < cids->total; i++) {
const struct Cid* cid = (const struct Cid*)libp2p_utils_vector_get(cids, i);
struct WantlistEntry* entry = ipfs_bitswap_wantlist_entry_new();
if (!ipfs_cid_protobuf_encode(cid, entry->block, entry->block_size, &entry->block_size)) {
// TODO: we should do more than return a half-baked list
return 0;
}
entry->cancel = 0;
entry->priority = 1;
libp2p_utils_vector_add(message->wantlist->entries, entry);
}
return 1;
}
/***
* Add the blocks to the BitswapMessage
* @param message the message
* @param blocks the requested blocks
* @returns true(1) on success, false(0) otherwise
*/
int ipfs_bitswap_message_add_blocks(struct BitswapMessage* message, struct Libp2pVector* blocks) {
// bitswap 1.0 uses blocks, bitswap 1.1 uses payload
if (message == NULL)
return 0;
if (message->payload == NULL) {
message->payload = libp2p_utils_vector_new(blocks->total);
if (message->payload == NULL)
return 0;
}
for(int i = 0; i < blocks->total; i++) {
const struct Block* current = (const struct Block*) libp2p_utils_vector_get(blocks, i);
libp2p_utils_vector_add(message->payload, current);
}
return 1;
}

11
exchange/bitswap/network.c
View file

@ -23,3 +23,14 @@ ipfs_bitswap_network_receive_message(struct BitswapContext* context) {
/**
* We want to pop something off the queue
*/
/****
* send a message to a particular peer
* @param context the BitswapContext
* @param peer the peer that is the recipient
* @param message the message to send
*/
int ipfs_bitswap_network_send_message(const struct BitswapContext* context, const struct Libp2pPeer* peer, const struct BitswapMessage* message) {
return 0;
}

59
exchange/bitswap/peer_request_queue.c
View file

@ -7,6 +7,8 @@
#include "libp2p/conn/session.h"
#include "ipfs/cid/cid.h"
#include "ipfs/exchange/bitswap/peer_request_queue.h"
#include "ipfs/exchange/bitswap/message.h"
#include "ipfs/exchange/bitswap/network.h"
/**
* Allocate resources for a new PeerRequest
@ -17,7 +19,7 @@ struct PeerRequest* ipfs_bitswap_peer_request_new() {
if (request != NULL) {
request->cids = NULL;
request->blocks = NULL;
request->context = NULL;
request->peer = NULL;
}
return request;
}
@ -118,7 +120,7 @@ struct PeerRequestEntry* ipfs_bitswap_peer_request_queue_find_entry(struct PeerR
if (request != NULL) {
struct PeerRequestEntry* current = queue->first;
while (current != NULL) {
if (libp2p_session_context_compare(current->current->context, request->context) == 0)
if (libp2p_peer_compare(current->current->peer, request->peer) == 0)
return current;
current = current->next;
}
@ -193,7 +195,58 @@ int ipfs_bitswap_peer_request_queue_fill(struct PeerRequestQueue* queue, struct
* @returns true(1) on succes, otherwise false(0)
*/
int ipfs_bitswap_peer_request_process_entry(const struct BitswapContext* context, struct PeerRequest* request) {
//TODO: Implement this method
// determine if we're connected
int connected = request->peer == NULL || request->peer->connection_type == CONNECTION_TYPE_CONNECTED;
int need_to_connect = request->cids != NULL;
// determine if we need to connect
if (need_to_connect) {
if (!connected) {
// connect
connected = libp2p_peer_connect(&context->ipfsNode->identity->private_key, request->peer, 0);
}
if (connected) {
// build a message
struct BitswapMessage* msg = ipfs_bitswap_message_new();
// add requests
ipfs_bitswap_message_add_wantlist_items(msg, request->cids);
// add blocks
ipfs_bitswap_message_add_blocks(msg, request->blocks);
// send message
if (ipfs_bitswap_network_send_message(context, request->peer, msg))
return 1;
}
}
return 0;
}
/***
* Find a PeerRequest related to a peer. If one is not found, it is created.
*
* @param peer_request_queue the queue to look through
* @param peer the peer to look for
* @returns a PeerRequestEntry or NULL on error
*/
struct PeerRequest* ipfs_peer_request_queue_find_peer(struct PeerRequestQueue* queue, struct Libp2pPeer* peer) {
struct PeerRequestEntry* entry = queue->first;
while (entry != NULL) {
if (libp2p_peer_compare(entry->current->peer, peer) == 0) {
return entry->current;
}
}
entry = ipfs_bitswap_peer_request_entry_new();
entry->current->peer = peer;
entry->prior = queue->last;
queue->last = entry;
return entry->current;
}

27
exchange/bitswap/wantlist_queue.c
View file

@ -231,15 +231,30 @@ int ipfs_bitswap_wantlist_get_block_locally(struct BitswapContext* context, stru
*
* This will ask the network for who has the file, using the router.
* It will then ask the specific nodes for the file. This method
* does not queue anything. It actually does the work.
* does not queue anything. It actually does the work. The remotes
* will queue the file, but we'll return before they respond.
*
* @param context the BitswapContext
* @param cid the id of the file
* @param block where to put the results
* @returns true(1) if found, false(0) otherwise
* @returns true(1) if we found some providers to ask, false(0) otherwise
*/
int ipfs_bitswap_wantlist_get_block_remote(struct BitswapContext* context, struct Cid* cid, struct Block** block) {
//TODO: Implement this workhorse of a method
int ipfs_bitswap_wantlist_get_block_remote(struct BitswapContext* context, struct Cid* cid) {
// find out who may have the file
struct Libp2pVector* providers = NULL;
if (context->ipfsNode->routing->FindProviders(context->ipfsNode->routing, cid->hash, cid->hash_length, &providers)) {
for(int i = 0; i < providers->total; i++) {
struct Libp2pPeer* current = (struct Libp2pPeer*) libp2p_utils_vector_get(providers, i);
// add this to their queue
struct PeerRequest* queueEntry = ipfs_peer_request_queue_find_peer(context->peerRequestQueue, current);
libp2p_utils_vector_add(queueEntry->cids, cid);
// process this queue
// NOTE: We need to ask the remotes via bitswap, and wait for a response before returning
// there will need to be some fancy stuff to know when we get it back so that this method
// can return with the block
ipfs_bitswap_peer_request_process_entry(context, queueEntry);
}
return 1;
}
return 0;
}
@ -257,7 +272,7 @@ int ipfs_bitswap_wantlist_process_entry(struct BitswapContext* context, struct W
return 0;
}
if (local_request && !have_local) {
if (!ipfs_bitswap_wantlist_get_block_remote(context, entry->cid, &entry->block)) {
if (!ipfs_bitswap_wantlist_get_block_remote(context, entry->cid)) {
// if we were unsuccessful in retrieving it, put it back in the queue?
// I don't think so. But I'm keeping this counter here until we have
// a final decision. Maybe lower the priority?

2
include/ipfs/cid/cid.h
View file

@ -45,7 +45,7 @@ struct CidSet {
* @param max_buffer_length the length of the buffer
* @param bytes_written the number of bytes written
*/
int ipfs_cid_protobuf_encode(struct Cid* incoming, unsigned char* buffer, size_t max_buffer_length, size_t* bytes_written);
int ipfs_cid_protobuf_encode(const struct Cid* incoming, unsigned char* buffer, size_t max_buffer_length, size_t* bytes_written);
/***
* decode an array of bytes into a Cid structure

15
include/ipfs/exchange/bitswap/message.h
View file

@ -1,3 +1,4 @@
#pragma once
/***
* A protobuf-able Bitswap Message
*/
@ -200,4 +201,18 @@ int ipfs_bitswap_message_protobuf_encode(struct BitswapMessage* message, unsigne
*/
int ipfs_bitswap_message_protobuf_decode(unsigned char* buffer, size_t buffer_length, struct BitswapMessage** output);
/****
* Add a vector of Cids to the bitswap message
* @param message the message
* @param cids a Libp2pVector of cids
* @returns true(1) on success, otherwise false(0)
*/
int ipfs_bitswap_message_add_wantlist_items(struct BitswapMessage* message, struct Libp2pVector* cids);
/***
* Add the blocks to the BitswapMessage
* @param message the message
* @param blocks the requested blocks
* @returns true(1) on success, false(0) otherwise
*/
int ipfs_bitswap_message_add_blocks(struct BitswapMessage* message, struct Libp2pVector* blocks);

10
include/ipfs/exchange/bitswap/network.h
View file

@ -4,6 +4,8 @@
*/
#include "libp2p/conn/session.h"
#include "libp2p/peer/peer.h"
#include "ipfs/exchange/bitswap/bitswap.h"
#include "ipfs/exchange/bitswap/message.h"
struct BitswapRouting {
@ -61,3 +63,11 @@ struct BitswapNetwork {
*/
struct BitswapMessageSender* (*NewMessageSender)(struct SessionContext* context, unsigned char* peerId);
};
/****
* send a message to a particular peer
* @param context the BitswapContext
* @param peer the peer that is the recipient
* @param message the message to send
*/
int ipfs_bitswap_network_send_message(const struct BitswapContext* context, const struct Libp2pPeer* peer, const struct BitswapMessage* message);

14
include/ipfs/exchange/bitswap/peer_request_queue.h
View file

@ -1,15 +1,17 @@
#pragma once
/***
* A queue for requests to/from remote peers
* NOTE: This must handle multiple threads
*/
#include <pthread.h>
#include "libp2p/peer/peer.h"
#include "ipfs/exchange/bitswap/bitswap.h"
#include "ipfs/blocks/block.h"
struct PeerRequest {
pthread_mutex_t request_mutex;
struct SessionContext* context;
struct Libp2pPeer* peer;
struct Libp2pVector* cids;
struct Libp2pVector* blocks;
};
@ -112,3 +114,13 @@ int ipfs_bitswap_peer_request_entry_free(struct PeerRequestEntry* entry);
* @returns true(1) on succes, otherwise false(0)
*/
int ipfs_bitswap_peer_request_process_entry(const struct BitswapContext* context, struct PeerRequest* request);
/***
* Find a PeerRequest related to a peer. If one is not found, it is created.
*
* @param peer_request_queue the queue to look through
* @param peer the peer to look for
* @returns a PeerRequestEntry or NULL on error
*/
struct PeerRequest* ipfs_peer_request_queue_find_peer(struct PeerRequestQueue* queue, struct Libp2pPeer* peer);

2
include/ipfs/routing/routing.h
View file

@ -37,7 +37,7 @@ struct IpfsRouting {
* @param routing the context
* @param key the information that is being looked for
* @param key_size the size of param 2
* @param peers a vector of peers found that can provide the value for the key
* @param peers a vector of Libp2pPeers found that can provide the value for the key
* @returns true(1) on success, otherwise false(0)
*/
int (*FindProviders) (struct IpfsRouting* routing, const unsigned char* key, size_t key_size, struct Libp2pVector** peers);

10
routing/online.c
View file

@ -36,8 +36,8 @@ struct Libp2pMessage* ipfs_routing_online_send_receive_message(struct SessionCon
}
// send the message, and expect the same back
sessionContext->default_stream->write(sessionContext->default_stream, protobuf, protobuf_size);
sessionContext->default_stream->read(sessionContext->default_stream, &results, &results_size, 5);
sessionContext->default_stream->write(sessionContext, protobuf, protobuf_size);
sessionContext->default_stream->read(sessionContext, &results, &results_size, 5);
// see if we can unprotobuf
if (!libp2p_message_protobuf_decode(results, results_size, &return_message))
@ -291,7 +291,7 @@ int ipfs_routing_online_ping(struct IpfsRouting* routing, struct Libp2pPeer* pee
size_t protobuf_size;
if (peer->connection_type != CONNECTION_TYPE_CONNECTED) {
if (!libp2p_peer_connect(peer, 5))
if (!libp2p_peer_connect(&routing->local_node->identity->private_key, peer, 5))
return 0;
}
if (peer->connection_type == CONNECTION_TYPE_CONNECTED) {
@ -411,7 +411,7 @@ int ipfs_routing_online_get_value (ipfs_routing* routing, const unsigned char *k
if (!libp2p_peer_is_connected(current_peer)) {
// attempt to connect. If unsuccessful, continue in the loop.
libp2p_logger_debug("online", "Attempting to connect to peer to retrieve file\n");
if (libp2p_peer_connect(current_peer, 5)) {
if (libp2p_peer_connect(&routing->local_node->identity->private_key, current_peer, 5)) {
libp2p_logger_debug("online", "Peer connected\n");
if (ipfs_routing_online_get_peer_value(routing, current_peer, key, key_size, buffer, buffer_size)) {
libp2p_logger_debug("online", "Retrieved a value\n");
@ -484,7 +484,7 @@ int ipfs_routing_online_bootstrap(struct IpfsRouting* routing) {
return -1; // this should never happen
}
if (peer->sessionContext == NULL) { // should always be true unless we added it twice (TODO: we should prevent that earlier)
libp2p_peer_connect(peer, 5);
libp2p_peer_connect(&routing->local_node->identity->private_key, peer, 5);
}
}
}

6
test/exchange/test_bitswap.h
View file

@ -164,9 +164,6 @@ int test_bitswap_retrieve_file_third_party() {
int retVal = 0;
/*
libp2p_logger_add_class("online");
libp2p_logger_add_class("multistream");
libp2p_logger_add_class("null");
libp2p_logger_add_class("dht_protocol");
libp2p_logger_add_class("providerstore");
libp2p_logger_add_class("peerstore");
@ -174,6 +171,9 @@ int test_bitswap_retrieve_file_third_party() {
libp2p_logger_add_class("peer");
*/
libp2p_logger_add_class("test_bitswap");
libp2p_logger_add_class("null");
libp2p_logger_add_class("online");
libp2p_logger_add_class("multistream");
// clean out repository
char* ipfs_path = "/tmp/test1";

2
test/routing/test_routing.h
View file

@ -233,7 +233,7 @@ int test_routing_find_providers() {
struct Libp2pPeer *remote_peer = NULL;
for(int i = 0; i < result->total; i++) {
remote_peer = (struct Libp2pPeer*)libp2p_utils_vector_get(result, i);
if (remote_peer->connection_type == CONNECTION_TYPE_CONNECTED || libp2p_peer_connect(remote_peer, 5)) {
if (remote_peer->connection_type == CONNECTION_TYPE_CONNECTED || libp2p_peer_connect(&local_node.identity->private_key, remote_peer, 5)) {
break;
}
remote_peer = NULL;