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implementation of bitswap network receive

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This commit is contained in:
John Jones 2017-07-31 08:16:52 -05:00
parent 45c997cd9a
commit d969f48324
7 changed files with 103 additions and 31 deletions
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4
core/null.c
View file

@ -21,6 +21,7 @@
#include "ipfs/merkledag/merkledag.h"
#include "ipfs/merkledag/node.h"
#include "ipfs/util/thread_pool.h"
#include "ipfs/exchange/bitswap/network.h"
#define BUF_SIZE 4096
@ -101,6 +102,9 @@ int ipfs_null_marshal(const unsigned char* incoming, size_t incoming_size, struc
// this handles 1 transaction
libp2p_routing_dht_handle_message(session, connection_param->local_node->peerstore, connection_param->local_node->providerstore);
libp2p_logger_log("null", LOGLEVEL_DEBUG, "kademlia message handled\n");
} else if (protocol_compare(incoming, incoming_size, "/ipfs/bitswap/")) {
libp2p_logger_debug("null", "Attempting bitswap connection...\n");
return ipfs_bitswap_network_handle_message(connection_param->local_node, session, incoming, incoming_size);
}
else {
libp2p_logger_error("null", "There was a problem with this connection. It is nothing I can handle. Disconnecting.\n");

6
exchange/bitswap/message.c
View file

@ -464,7 +464,7 @@ int ipfs_bitswap_message_free(struct BitswapMessage* message) {
* @param message the BitswapMessage
* @returns the maximum size of the protobuf'd BitswapMessage
*/
size_t ipfs_bitswap_message_protobuf_encode_size(struct BitswapMessage* message) {
size_t ipfs_bitswap_message_protobuf_encode_size(const struct BitswapMessage* message) {
size_t total = 0;
if (message != NULL) {
if (message->blocks != NULL) {
@ -495,7 +495,7 @@ size_t ipfs_bitswap_message_protobuf_encode_size(struct BitswapMessage* message)
* @param bytes_written the total number of bytes written to the buffer
* @returns true(1) on success, otherwise false(0)
*/
int ipfs_bitswap_message_protobuf_encode(struct BitswapMessage* message, unsigned char* buffer, size_t buffer_length, size_t* bytes_written) {
int ipfs_bitswap_message_protobuf_encode(const struct BitswapMessage* message, unsigned char* buffer, size_t buffer_length, size_t* bytes_written) {
size_t bytes_used = 0;
*bytes_written = 0;
@ -558,7 +558,7 @@ int ipfs_bitswap_message_protobuf_encode(struct BitswapMessage* message, unsigne
* @param output the newly allocated BitswapMessage
* @returns true(1) on success, otherwise false(0)
*/
int ipfs_bitswap_message_protobuf_decode(unsigned char* buffer, size_t buffer_length, struct BitswapMessage** output) {
int ipfs_bitswap_message_protobuf_decode(const uint8_t* buffer, size_t buffer_length, struct BitswapMessage** output) {
size_t pos = 0;
*output = NULL;

94
exchange/bitswap/network.c
View file

@ -6,23 +6,7 @@
*/
#include "ipfs/exchange/bitswap/network.h"
/***
* The main loop
*/
/**
* We received a BitswapMessage from the network
*/
/*
ipfs_bitswap_network_receive_message(struct BitswapContext* context) {
}
*/
/**
* We want to pop something off the queue
*/
#include "ipfs/exchange/bitswap/peer_request_queue.h"
/****
* send a message to a particular peer
@ -30,7 +14,81 @@ ipfs_bitswap_network_receive_message(struct BitswapContext* context) {
* @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) {
int ipfs_bitswap_network_send_message(const struct BitswapContext* context, struct Libp2pPeer* peer, const struct BitswapMessage* message) {
// get a connection to the peer
if (peer->connection_type != CONNECTION_TYPE_CONNECTED) {
libp2p_peer_connect(&context->ipfsNode->identity->private_key, peer, 10);
if(peer->connection_type != CONNECTION_TYPE_CONNECTED)
return 0;
}
// protobuf the message
size_t buf_size = ipfs_bitswap_message_protobuf_encode_size(message);
uint8_t* buf = (uint8_t*) malloc(buf_size + 20);
if (buf == NULL)
return 0;
if (!ipfs_bitswap_message_protobuf_encode(message, &buf[20], buf_size, &buf_size)) {
free(buf);
return 0;
}
// tack on the protocol header
memcpy(buf, "/ipfs/bitswap/1.1.0\n", 20);
buf_size += 20;
// send it
int bytes_written = peer->sessionContext->default_stream->write(peer->sessionContext->default_stream, buf, buf_size);
if (bytes_written <= 0) {
free(buf);
return 0;
}
free(buf);
return 1;
}
/***
* Handle a raw incoming bitswap message from the network
* @param node us
* @param sessionContext the connection context
* @param bytes the message
* @param bytes_size the size of the message
* @returns true(1) on success, false(0) otherwise.
*/
int ipfs_bitswap_network_handle_message(const struct IpfsNode* node, const struct SessionContext* sessionContext, const uint8_t* bytes, size_t bytes_length) {
struct BitswapContext* bitswapContext = (struct BitswapContext*)node->exchange->exchangeContext;
// strip off the protocol header
int start = -1;
for(int i = 0; i < bytes_length; i++) {
if (bytes[i] == '\n') {
start = i+1;
break;
}
}
if (start == -1)
return 0;
// un-protobuf the message
struct BitswapMessage* message = NULL;
if (!ipfs_bitswap_message_protobuf_decode(&bytes[start], bytes_length - start, &message))
return 0;
// process the message
// payload - what we want
for(int i = 0; i < message->payload->total; i++) {
struct Block* blk = (struct Block*)libp2p_utils_vector_get(message->payload, i);
node->exchange->HasBlock(node->exchange, blk);
}
// wantlist - what they want
if (message->wantlist != NULL && message->wantlist->entries != NULL && message->wantlist->entries->total > 0) {
// get the peer
struct Libp2pPeer* peer = libp2p_peerstore_get_peer(node->peerstore, (unsigned char*)sessionContext->remote_peer_id, strlen(sessionContext->remote_peer_id));
struct PeerRequestEntry* queueEntry = ipfs_bitswap_peer_request_queue_find_entry(bitswapContext->peerRequestQueue, peer);
for(int i = 0; i < message->wantlist->entries->total; i++) {
struct WantlistEntry* entry = (struct WantlistEntry*) libp2p_utils_vector_get(message->wantlist->entries, i);
// turn the "block" back into a cid
struct Cid* cid = NULL;
if (!ipfs_cid_protobuf_decode(entry->block, entry->block_size, &cid)) {
ipfs_cid_free(cid);
return 0;
}
// add the cid to their queue
libp2p_utils_vector_add(queueEntry->current->cids, cid);
}
}
return 1;
}

8
exchange/bitswap/peer_request_queue.c
View file

@ -95,7 +95,7 @@ int ipfs_bitswap_peer_request_queue_add(struct PeerRequestQueue* queue, struct P
*/
int ipfs_bitswap_peer_request_queue_remove(struct PeerRequestQueue* queue, struct PeerRequest* request) {
if (request != NULL) {
struct PeerRequestEntry* entry = ipfs_bitswap_peer_request_queue_find_entry(queue, request);
struct PeerRequestEntry* entry = ipfs_bitswap_peer_request_queue_find_entry(queue, request->peer);
if (entry != NULL) {
pthread_mutex_lock(&queue->queue_mutex);
// remove the entry's link, and hook prior and next together
@ -116,11 +116,11 @@ int ipfs_bitswap_peer_request_queue_remove(struct PeerRequestQueue* queue, struc
* @param request what we're looking for
* @returns the PeerRequestEntry or NULL if not found
*/
struct PeerRequestEntry* ipfs_bitswap_peer_request_queue_find_entry(struct PeerRequestQueue* queue, struct PeerRequest* request) {
if (request != NULL) {
struct PeerRequestEntry* ipfs_bitswap_peer_request_queue_find_entry(struct PeerRequestQueue* queue, struct Libp2pPeer* peer) {
if (peer != NULL) {
struct PeerRequestEntry* current = queue->first;
while (current != NULL) {
if (libp2p_peer_compare(current->current->peer, request->peer) == 0)
if (libp2p_peer_compare(current->current->peer, peer) == 0)
return current;
current = current->next;
}

6
include/ipfs/exchange/bitswap/message.h
View file

@ -180,7 +180,7 @@ int ipfs_bitswap_message_free(struct BitswapMessage* message);
* @param message the BitswapMessage
* @returns the maximum size of the protobuf'd BitswapMessage
*/
size_t ipfs_bitswap_message_protobuf_encode_size(struct BitswapMessage* message);
size_t ipfs_bitswap_message_protobuf_encode_size(const struct BitswapMessage* message);
/***
* Encode a BitswapMessage into a protobuf buffer
@ -190,7 +190,7 @@ size_t ipfs_bitswap_message_protobuf_encode_size(struct BitswapMessage* message)
* @param bytes_written the total number of bytes written to the buffer
* @returns true(1) on success, otherwise false(0)
*/
int ipfs_bitswap_message_protobuf_encode(struct BitswapMessage* message, unsigned char* buffer, size_t buffer_length, size_t* bytes_written);
int ipfs_bitswap_message_protobuf_encode(const struct BitswapMessage* message, unsigned char* buffer, size_t buffer_length, size_t* bytes_written);
/***
* Decode a BitswapMessage from a protobuf
@ -199,7 +199,7 @@ int ipfs_bitswap_message_protobuf_encode(struct BitswapMessage* message, unsigne
* @param output the newly allocated BitswapMessage
* @returns true(1) on success, otherwise false(0)
*/
int ipfs_bitswap_message_protobuf_decode(unsigned char* buffer, size_t buffer_length, struct BitswapMessage** output);
int ipfs_bitswap_message_protobuf_decode(const uint8_t* buffer, size_t buffer_length, struct BitswapMessage** output);
/****
* Add a vector of Cids to the bitswap message

12
include/ipfs/exchange/bitswap/network.h
View file

@ -70,4 +70,14 @@ struct BitswapNetwork {
* @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);
int ipfs_bitswap_network_send_message(const struct BitswapContext* context, struct Libp2pPeer* peer, const struct BitswapMessage* message);
/***
* Handle a raw incoming bitswap message from the network
* @param node us
* @param sessionContext the connection context
* @param bytes the message
* @param bytes_size the size of the message
* @returns true(1) on success, false(0) otherwise.
*/
int ipfs_bitswap_network_handle_message(const struct IpfsNode* node, const struct SessionContext* sessionContext, const uint8_t* bytes, size_t bytes_length);

2
include/ipfs/exchange/bitswap/peer_request_queue.h
View file

@ -83,7 +83,7 @@ struct PeerRequest* ipfs_bitswap_peer_request_queue_pop(struct PeerRequestQueue*
* @param request what we're looking for
* @returns the PeerRequestEntry or NULL if not found
*/
struct PeerRequestEntry* ipfs_bitswap_peer_request_queue_find_entry(struct PeerRequestQueue* queue, struct PeerRequest* request);
struct PeerRequestEntry* ipfs_bitswap_peer_request_queue_find_entry(struct PeerRequestQueue* queue, struct Libp2pPeer* peer);
/***
* Add a block to the appropriate peer's queue