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Broke out the marshaling of incoming requests

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This commit is contained in:
John Jones 2017-07-17 14:38:13 -05:00
parent 069379acf4
commit d038b5d6f7
1 changed files with 80 additions and 59 deletions
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139
core/null.c
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@ -35,13 +35,79 @@ static int null_shutting_down = 0;
* @param test the protocol string to compare it with (i.e. "/secio" or "/nodeio"
* @returns true(1) if there was a match, false(0) otherwise
*/
int protocol_compare(unsigned char* incoming, size_t incoming_size, const char* test) {
int protocol_compare(const unsigned char* incoming, size_t incoming_size, const char* test) {
int test_size = strlen(test);
if (incoming_size >= test_size && strncmp((char*)incoming, test, test_size) == 0)
return 1;
return 0;
}
/***
* Handle the incoming request from a Multistream
* @param incoming the incoming request
* @param incoming_size the size of the request in bytes
* @param session the session context
* @param connection_param the connection parameters
* @returns True(1) on success, False(0) on error
*/
int ipfs_null_marshal(const unsigned char* incoming, size_t incoming_size, struct SessionContext* session, struct null_connection_params *connection_param) {
if (protocol_compare(incoming, incoming_size, "/secio")) {
libp2p_logger_debug("null", "Attempting secure io connection...\n");
if (!libp2p_secio_handshake(session, &connection_param->local_node->identity->private_key, 1)) {
// rejecting connection
libp2p_logger_debug("null", "Secure IO connection failed\n");
return 0;
}
libp2p_logger_debug("null", "Secure IO connection successful.\n");
} else if (protocol_compare(incoming, incoming_size, "/nodeio")) {
libp2p_logger_debug("null", "Attempting a nodeio connection.\n");
if (!libp2p_nodeio_handshake(session)) {
return 0;
}
// loop through file requests
int _continue = 1;
while(_continue) {
unsigned char* hash;
size_t hash_length = 0;
_continue = session->default_stream->read(session, &hash, &hash_length, DEFAULT_NETWORK_TIMEOUT);
if (hash_length < 20) {
_continue = 0;
continue;
}
else {
// try to get the Node
struct HashtableNode* node = NULL;
if (!ipfs_merkledag_get(hash, hash_length, &node, connection_param->local_node->repo)) {
_continue = 0;
continue;
}
size_t results_size = ipfs_hashtable_node_protobuf_encode_size(node);
unsigned char results[results_size];
if (!ipfs_hashtable_node_protobuf_encode(node, results, results_size, &results_size)) {
_continue = 0;
continue;
}
// send it to the requestor
session->default_stream->write(session, results, results_size);
}
}
} else if (protocol_compare(incoming, incoming_size, "/ipfs/kad/")) {
libp2p_logger_log("null", LOGLEVEL_DEBUG, "Attempting kademlia connection...\n");
if (!libp2p_routing_dht_handshake(session)) {
libp2p_logger_log("null", LOGLEVEL_DEBUG, "kademlia connection handshake failed\n");
return 0;
}
// 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 {
libp2p_logger_error("null", "There was a problem with this connection. It is nothing I can handle. Disconnecting.\n");
return 0;
}
return 1;
}
/**
* We've received a connection. Find out what they want
*/
@ -62,80 +128,35 @@ void ipfs_null_connection (void *ptr)
libp2p_logger_log("null", LOGLEVEL_INFO, "Connection %d, count %d\n", connection_param->file_descriptor, *(connection_param->count));
if (libp2p_net_multistream_negotiate(&session)) {
// Someone has connected and successfully negotiated multistream. Now talk to them...
for(;;) {
// check if they're looking for an upgrade (i.e. secio)
// Wait for them to ask something...
unsigned char* results = NULL;
size_t bytes_read = 0;
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", "stream transaction read returned false\n");
break;
}
if (null_shutting_down) {
// this service is shutting down. Ignore the request and exit the loop
break;
}
if (bytes_read == 0) { // timeout
if (bytes_read == 0) {
// They did not ask for anything. There was a timeout. Wait again.
continue;
}
// We actually got something. Process the request...
libp2p_logger_debug("null", "Read %lu bytes from a stream tranaction\n", bytes_read);
if (protocol_compare(results, bytes_read, "/secio")) {
libp2p_logger_debug("null", "Attempting secure io connection...\n");
if (!libp2p_secio_handshake(&session, &connection_param->local_node->identity->private_key, 1)) {
// rejecting connection
libp2p_logger_debug("null", "Secure IO connection failed\n");
free(results);
break;
}
libp2p_logger_debug("null", "Secure IO connection successful.\n");
} else if (protocol_compare(results, bytes_read, "/nodeio")) {
libp2p_logger_debug("null", "Attempting a nodeio connection.\n");
if (!libp2p_nodeio_handshake(&session)) {
free(results);
break;
}
// loop through file requests
int _continue = 1;
while(_continue) {
unsigned char* hash;
size_t hash_length = 0;
_continue = session.default_stream->read(&session, &hash, &hash_length, DEFAULT_NETWORK_TIMEOUT);
if (hash_length < 20) {
_continue = 0;
continue;
}
else {
// try to get the Node
struct HashtableNode* node = NULL;
if (!ipfs_merkledag_get(hash, hash_length, &node, connection_param->local_node->repo)) {
_continue = 0;
continue;
}
size_t results_size = ipfs_hashtable_node_protobuf_encode_size(node);
unsigned char results[results_size];
if (!ipfs_hashtable_node_protobuf_encode(node, results, results_size, &results_size)) {
_continue = 0;
continue;
}
// send it to the requestor
session.default_stream->write(&session, results, results_size);
}
}
} else if (protocol_compare(results, bytes_read, "/ipfs/kad/")) {
libp2p_logger_log("null", LOGLEVEL_DEBUG, "Attempting kademlia connection...\n");
if (!libp2p_routing_dht_handshake(&session)) {
libp2p_logger_log("null", LOGLEVEL_DEBUG, "kademlia connection handshake failed\n");
free(results);
break;
}
// 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 {
libp2p_logger_error("null", "There was a problem with this connection. It is nothing I can handle. Disconnecting.\n");
int retVal = ipfs_null_marshal(results, bytes_read, &session, connection_param);
free(results);
if (!retVal) {
libp2p_logger_debug("null", "ipfs_null_marshal returned false\n");
break;
}
free(results);
}
} else {
libp2p_logger_log("null", LOGLEVEL_DEBUG, "Multistream negotiation failed\n");