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More yamux changes

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This commit is contained in:
John Jones 2017-11-19 19:29:40 -05:00
parent db67210257
commit 2d74c53b62
18 changed files with 1277 additions and 78 deletions
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22
conn/dialer.c
View file

@ -30,31 +30,18 @@ struct Dialer* libp2p_conn_dialer_new(struct Libp2pPeer* peer, struct Peerstore*
struct Dialer* dialer = (struct Dialer*)malloc(sizeof(struct Dialer));
if (dialer != NULL) {
dialer->peerstore = peerstore;
dialer->private_key = rsa_private_key;
dialer->transport_dialers = NULL;
dialer->fallback_dialer = libp2p_conn_tcp_transport_dialer_new(dialer->peer_id, rsa_private_key);
if (peer != NULL) {
dialer->peer_id = malloc(peer->id_size + 1);
memset(dialer->peer_id, 0, peer->id_size + 1);
if (dialer->peer_id != NULL) {
strncpy(dialer->peer_id, peer->id, peer->id_size);
// convert private key to rsa private key
/*
struct RsaPrivateKey* rsa_private_key = libp2p_crypto_rsa_rsa_private_key_new();
if (!libp2p_crypto_encoding_x509_der_to_private_key(private_key->data, private_key->data_size, rsa_private_key)) {
libp2p_crypto_rsa_rsa_private_key_free(rsa_private_key);
libp2p_conn_dialer_free(dialer);
return NULL;
}
if (!libp2p_crypto_rsa_private_key_fill_public_key(rsa_private_key)) {
libp2p_crypto_rsa_rsa_private_key_free(rsa_private_key);
libp2p_conn_dialer_free(dialer);
return NULL;
}
*/
dialer->private_key = rsa_private_key;
//TODO: build transport dialers
dialer->transport_dialers = NULL;
dialer->fallback_dialer = libp2p_conn_tcp_transport_dialer_new(dialer->peer_id, rsa_private_key);
return dialer;
}
}
libp2p_conn_dialer_free(dialer);
return NULL;
}
@ -66,6 +53,7 @@ struct Dialer* libp2p_conn_dialer_new(struct Libp2pPeer* peer, struct Peerstore*
*/
void libp2p_conn_dialer_free(struct Dialer* in) {
if (in != NULL) {
if (in->peer_id != NULL)
free(in->peer_id);
libp2p_crypto_rsa_rsa_private_key_free(in->private_key);
if (in->transport_dialers != NULL) {

6
conn/transport_dialer.c
View file

@ -6,12 +6,14 @@
struct TransportDialer* libp2p_conn_transport_dialer_new(char* peer_id, struct RsaPrivateKey* private_key) {
struct TransportDialer* out = (struct TransportDialer*)malloc(sizeof(struct TransportDialer));
if (out != NULL) {
out->peer_id = NULL;
out->private_key = NULL;
if (peer_id != NULL) {
out->peer_id = malloc(strlen(peer_id) + 1);
strcpy(out->peer_id, peer_id);
}
if (private_key != NULL) {
out->private_key = private_key;
} else {
out->private_key = NULL;
}
}
return out;

15
include/libp2p/net/connectionstream.h
View file

@ -3,6 +3,19 @@
#include "libp2p/net/stream.h"
#include "libp2p/conn/session.h"
/***
* This is a Stream wrapper around a basic tcp/ip connection
*/
/***
* Create a new stream based on a network connection, and attempt to connect
* @param fd the handle to the network connection
* @param ip the IP address of the connection
* @param port the port of the connection
* @returns a Stream
*/
struct Stream* libp2p_net_connection_new(int fd, char* ip, int port, struct SessionContext* session_context);
/***
* Create a new stream based on a network connection
* @param fd the handle to the network connection
@ -10,7 +23,7 @@
* @param port the port of the connection
* @returns a Stream
*/
struct Stream* libp2p_net_connection_new(int fd, char* ip, int port, struct SessionContext* session_context);
struct Stream* libp2p_net_connection_established(int fd, char* ip, int port, struct SessionContext* session_context);
/**
* Attempt to upgrade the parent_stream to use the new stream by default

19
include/libp2p/net/server.h Normal file
View file

@ -0,0 +1,19 @@
/**
* Header for libp2p/net/server
*/
/***
* Start a server given the information
* NOTE: This spins off a thread.
* @param ip the ip address to attach to
* @param port the port to use
* @param protocol_handlers the protocol handlers
* @returns true(1) on success, false(0) otherwise
*/
int libp2p_net_server_start(const char* ip, int port, struct Libp2pVector* protocol_handlers);
/***
* Shut down the server started by libp2p_net_start_server
* @returns true(1) on success, false(0) otherwise
*/
int libp2p_net_server_stop();

187
include/libp2p/utils/thread_pool.h Normal file
View file

@ -0,0 +1,187 @@
/**********************************
* @author Johan Hanssen Seferidis
* License: MIT
*
**********************************/
#ifndef _THPOOL_
#define _THPOOL_
#ifdef __cplusplus
extern "C" {
#endif
/* =================================== API ======================================= */
typedef struct thpool_* threadpool;
/**
* @brief Initialize threadpool
*
* Initializes a threadpool. This function will not return untill all
* threads have initialized successfully.
*
* @example
*
* ..
* threadpool thpool; //First we declare a threadpool
* thpool = thpool_init(4); //then we initialize it to 4 threads
* ..
*
* @param num_threads number of threads to be created in the threadpool
* @return threadpool created threadpool on success,
* NULL on error
*/
threadpool thpool_init(int num_threads);
/**
* @brief Add work to the job queue
*
* Takes an action and its argument and adds it to the threadpool's job queue.
* If you want to add to work a function with more than one arguments then
* a way to implement this is by passing a pointer to a structure.
*
* NOTICE: You have to cast both the function and argument to not get warnings.
*
* @example
*
* void print_num(int num){
* printf("%d\n", num);
* }
*
* int main() {
* ..
* int a = 10;
* thpool_add_work(thpool, (void*)print_num, (void*)a);
* ..
* }
*
* @param threadpool threadpool to which the work will be added
* @param function_p pointer to function to add as work
* @param arg_p pointer to an argument
* @return 0 on successs, -1 otherwise.
*/
int thpool_add_work(threadpool, void (*function_p)(void*), void* arg_p);
/**
* @brief Wait for all queued jobs to finish
*
* Will wait for all jobs - both queued and currently running to finish.
* Once the queue is empty and all work has completed, the calling thread
* (probably the main program) will continue.
*
* Smart polling is used in wait. The polling is initially 0 - meaning that
* there is virtually no polling at all. If after 1 seconds the threads
* haven't finished, the polling interval starts growing exponentially
* untill it reaches max_secs seconds. Then it jumps down to a maximum polling
* interval assuming that heavy processing is being used in the threadpool.
*
* @example
*
* ..
* threadpool thpool = thpool_init(4);
* ..
* // Add a bunch of work
* ..
* thpool_wait(thpool);
* puts("All added work has finished");
* ..
*
* @param threadpool the threadpool to wait for
* @return nothing
*/
void thpool_wait(threadpool);
/**
* @brief Pauses all threads immediately
*
* The threads will be paused no matter if they are idle or working.
* The threads return to their previous states once thpool_resume
* is called.
*
* While the thread is being paused, new work can be added.
*
* @example
*
* threadpool thpool = thpool_init(4);
* thpool_pause(thpool);
* ..
* // Add a bunch of work
* ..
* thpool_resume(thpool); // Let the threads start their magic
*
* @param threadpool the threadpool where the threads should be paused
* @return nothing
*/
void thpool_pause(threadpool);
/**
* @brief Unpauses all threads if they are paused
*
* @example
* ..
* thpool_pause(thpool);
* sleep(10); // Delay execution 10 seconds
* thpool_resume(thpool);
* ..
*
* @param threadpool the threadpool where the threads should be unpaused
* @return nothing
*/
void thpool_resume(threadpool);
/**
* @brief Destroy the threadpool
*
* This will wait for the currently active threads to finish and then 'kill'
* the whole threadpool to free up memory.
*
* @example
* int main() {
* threadpool thpool1 = thpool_init(2);
* threadpool thpool2 = thpool_init(2);
* ..
* thpool_destroy(thpool1);
* ..
* return 0;
* }
*
* @param threadpool the threadpool to destroy
* @return nothing
*/
void thpool_destroy(threadpool);
/**
* @brief Show currently working threads
*
* Working threads are the threads that are performing work (not idle).
*
* @example
* int main() {
* threadpool thpool1 = thpool_init(2);
* threadpool thpool2 = thpool_init(2);
* ..
* printf("Working threads: %d\n", thpool_num_threads_working(thpool1));
* ..
* return 0;
* }
*
* @param threadpool the threadpool of interest
* @return integer number of threads working
*/
int thpool_num_threads_working(threadpool);
#ifdef __cplusplus
}
#endif
#endif

2
include/libp2p/yamux/yamux.h
View file

@ -24,6 +24,8 @@ struct YamuxContext {
int am_server;
int state; // the state of the connection
struct Libp2pVector* protocol_handlers;
struct StreamMessage* buffered_message;
long buffered_message_pos;
};
struct YamuxChannelContext {

2
net/Makefile
View file

@ -7,7 +7,7 @@ endif
LFLAGS =
DEPS =
OBJS = sctp.o socket.o tcp.o udp.o multistream.o protocol.o connectionstream.o stream.o
OBJS = sctp.o socket.o tcp.o udp.o multistream.o protocol.o connectionstream.o stream.o server.o
%.o: %.c $(DEPS)
$(CC) -c -o $@ $< $(CFLAGS)

75
net/connectionstream.c
View file

@ -66,7 +66,54 @@ int libp2p_net_connection_peek(void* stream_context) {
* @returns true(1) on success, false(0) otherwise
*/
int libp2p_net_connection_read(void* stream_context, struct StreamMessage** msg, int timeout_secs) {
struct ConnectionContext* ctx = (struct ConnectionContext*) stream_context;
// read from the socket
uint8_t buffer[4096];
uint8_t* result_buffer = NULL;
int current_size = 0;
while (1) {
int retVal = socket_read(ctx->socket_descriptor, (char*)&buffer[0], 4096, 0, timeout_secs);
if (retVal < 1) { // get out of the loop
if (retVal < 0) // error
return -1;
break;
}
// add what we got to the message
if (result_buffer == NULL) {
result_buffer = malloc(retVal);
if (result_buffer == NULL)
return 0;
current_size = retVal;
memcpy(result_buffer, buffer, retVal);
} else {
void* alloc = realloc(result_buffer, current_size + retVal);
if (alloc == NULL) {
free(result_buffer);
return 0;
}
memcpy(&result_buffer[current_size], buffer, retVal);
current_size += retVal;
}
// Everything ok, loop again (possibly)
if (retVal != 4096)
break;
}
// now build the message
if (current_size > 0) {
*msg = libp2p_stream_message_new();
struct StreamMessage* result = *msg;
if (result == NULL) {
free(result_buffer);
return 0;
}
result->data = result_buffer;
result->data_size = current_size;
result->error_number = 0;
libp2p_logger_debug("connectionstream", "libp2p_connectionstream_read: Received %d bytes", result->data_size);
}
return current_size;
}
/**
@ -107,6 +154,14 @@ int libp2p_net_connection_write(void* stream_context, struct StreamMessage* msg)
return socket_write(ctx->socket_descriptor, (char*)msg->data, msg->data_size, 0);
}
int libp2p_net_handle_upgrade(struct Stream* old_stream, struct Stream* new_stream) {
struct ConnectionContext* ctx = (struct ConnectionContext*) old_stream->stream_context;
if (ctx->session_context != NULL) {
ctx->session_context->default_stream = new_stream;
}
return 1;
}
/***
* Create a new stream based on a network connection
* @param fd the handle to the network connection
@ -114,7 +169,7 @@ int libp2p_net_connection_write(void* stream_context, struct StreamMessage* msg)
* @param port the port of the connection
* @returns a Stream
*/
struct Stream* libp2p_net_connection_new(int fd, char* ip, int port, struct SessionContext* session_context) {
struct Stream* libp2p_net_connection_established(int fd, char* ip, int port, struct SessionContext* session_context) {
struct Stream* out = (struct Stream*) malloc(sizeof(struct Stream));
if (out != NULL) {
out->stream_type = STREAM_TYPE_RAW;
@ -123,6 +178,7 @@ struct Stream* libp2p_net_connection_new(int fd, char* ip, int port, struct Sess
out->read = libp2p_net_connection_read;
out->read_raw = libp2p_net_connection_read_raw;
out->write = libp2p_net_connection_write;
out->handle_upgrade = libp2p_net_handle_upgrade;
// Multiaddresss
char str[strlen(ip) + 25];
memset(str, 0, strlen(ip) + 16);
@ -138,13 +194,28 @@ struct Stream* libp2p_net_connection_new(int fd, char* ip, int port, struct Sess
out->stream_context = ctx;
ctx->socket_descriptor = fd;
ctx->session_context = session_context;
}
}
return out;
}
/***
* Create a new stream based on a network connection, and attempt to connect
* @param fd the handle to the network connection
* @param ip the IP address of the connection
* @param port the port of the connection
* @returns a Stream
*/
struct Stream* libp2p_net_connection_new(int fd, char* ip, int port, struct SessionContext* session_context) {
struct Stream* out = libp2p_net_connection_established(fd, ip, port, session_context);
if (out != NULL) {
struct ConnectionContext* ctx = (struct ConnectionContext*) out->stream_context;
if (!socket_connect4_with_timeout(ctx->socket_descriptor, hostname_to_ip(ip), port, 10) == 0) {
// unable to connect
libp2p_stream_free(out);
out = NULL;
}
}
}
return out;
}

14
net/protocol.c
View file

@ -15,12 +15,14 @@
* @returns true(1) if there was a match, false(0) otherwise
*/
const struct Libp2pProtocolHandler* protocol_compare(struct StreamMessage* msg, struct Libp2pVector* protocol_handlers) {
if (protocol_handlers != NULL) {
for(int i = 0; i < protocol_handlers->total; i++) {
const struct Libp2pProtocolHandler* handler = (const struct Libp2pProtocolHandler*) libp2p_utils_vector_get(protocol_handlers, i);
if (handler->CanHandle(msg)) {
return handler;
}
}
}
return NULL;
}
@ -50,16 +52,8 @@ int libp2p_protocol_marshal(struct StreamMessage* msg, struct Stream* stream, st
const struct Libp2pProtocolHandler* handler = protocol_compare(msg, handlers);
if (handler == NULL) {
// turn msg->data to a null terminated string for the error message
char str[msg->data_size + 1];
memcpy(str, msg->data, msg->data_size);
str[msg->data_size] = 0;
for(int i = 0; i < msg->data_size; i++) {
if (str[i] == '\n') {
str[i] = 0;
break;
}
}
// set the msg->error code
msg->error_number = 100;
return -1;
}

187
net/server.c Normal file
View file

@ -0,0 +1,187 @@
/**
* A simple tcp server that uses thread pools and protocol handlers
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <unistd.h>
#include <pthread.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "libp2p/conn/session.h"
#include "libp2p/net/connectionstream.h"
#include "libp2p/net/multistream.h"
#include "libp2p/net/p2pnet.h"
#include "libp2p/net/protocol.h"
#include "libp2p/nodeio/nodeio.h"
#include "libp2p/os/utils.h"
#include "libp2p/record/message.h"
#include "libp2p/routing/dht_protocol.h"
#include "libp2p/secio/secio.h"
#include "libp2p/utils/logger.h"
#include "libp2p/utils/thread_pool.h"
struct server_connection_params {
uint32_t ip_address_binary;
const char* ip_address_text;
uint16_t port;
struct Libp2pVector* protocol_handlers;
};
struct client_connection_params {
int file_descriptor;
int count;
uint16_t port;
char* ip;
struct Libp2pVector* protocol_handlers;
};
// this is the thread id NOTE: there should only be 1 server per instance, as this is a global
pthread_t server_pthread;
#define BUF_SIZE 4096
// this should be set to 5 for normal operation, perhaps higher for debugging purposes
#define DEFAULT_NETWORK_TIMEOUT 5
static int server_shutting_down = 0;
/**
* We've received a new connection. Find out what they want.
*
* @param ptr a pointer to a null_connection_params struct
*/
void libp2p_net_connection (void *ptr) {
struct client_connection_params *connection_param = (struct client_connection_params*) ptr;
int retVal = 0;
libp2p_logger_info("null", "Connection %d, count %d\n", connection_param->file_descriptor, connection_param->count);
//TODO: build a stream from the given information
struct Stream* clientStream = libp2p_net_connection_established(connection_param->file_descriptor, connection_param->ip, connection_param->port, NULL);
// try to read from the network
struct StreamMessage *results = NULL;
// handle the call
for(;;) {
// Read from the network
if (!clientStream->read(clientStream->stream_context, &results, DEFAULT_NETWORK_TIMEOUT)) {
// problem reading
break;
}
if (results != NULL) {
retVal = libp2p_protocol_marshal(results, clientStream, connection_param->protocol_handlers);
libp2p_stream_message_free(results);
results = NULL;
}
if (retVal < 0 || server_shutting_down) {
// exit the loop on error
break;
}
} // end of loop
connection_param->count--; // update counter.
if (connection_param->ip != NULL)
free(connection_param->ip);
free (connection_param);
return;
}
/***
* Called by the daemon to listen for connections
* @param ptr a pointer to an IpfsNodeListenParams struct
* @returns nothing useful.
*/
void* libp2p_server_listen (void *ptr)
{
server_shutting_down = 0;
int socketfd, s, count = 0;
threadpool thpool = thpool_init(25);
struct server_connection_params *connection_param = (struct server_connection_params*)ptr;
if ((socketfd = socket_listen(socket_tcp4(), &(connection_param->ip_address_binary), &(connection_param->port))) <= 0) {
libp2p_logger_error("null", "Failed to init null router. Address: %d, Port: %d\n", connection_param->ip_address_text, connection_param->port);
return (void*) 2;
}
struct client_connection_params* clientConnection = NULL;
// the main loop, listening for new connections
for (;;) {
int numDescriptors = socket_read_select4(socketfd, 2);
if (server_shutting_down) {
break;
}
if (numDescriptors > 0) {
s = socket_accept4(socketfd, &(connection_param->ip_address_binary), &(connection_param->port));
if (count >= 50) { // limit reached.
close (s);
continue;
}
count++;
clientConnection = malloc (sizeof (struct client_connection_params));
if (clientConnection) {
clientConnection->file_descriptor = s;
clientConnection->count = count;
clientConnection->port = connection_param->port;
clientConnection->ip = malloc(INET_ADDRSTRLEN);
clientConnection->protocol_handlers = connection_param->protocol_handlers;
if (clientConnection->ip == NULL) {
// we are out of memory
free(clientConnection);
continue;
}
if (inet_ntop(AF_INET, &(connection_param->ip_address_binary), clientConnection->ip, INET_ADDRSTRLEN) == NULL) {
free(clientConnection->ip);
clientConnection->ip = NULL;
clientConnection->port = 0;
}
// Create pthread for clientConnection.
thpool_add_work(thpool, libp2p_net_connection, clientConnection);
}
} else {
// timeout...
}
}
thpool_destroy(thpool);
free(connection_param);
close(socketfd);
return (void*) 2;
}
/***
* Start a server given the information
* NOTE: This spins off a thread.
* @param ip the ip address to attach to
* @param port the port to use
* @param protocol_handlers the protocol handlers
* @returns true(1) on success, false(0) otherwise
*/
int libp2p_net_server_start(const char* ip, int port, struct Libp2pVector* protocol_handlers) {
struct server_connection_params* params = (struct server_connection_params*) malloc(sizeof(struct server_connection_params));
params->ip_address_text = ip;
inet_pton(AF_INET, ip, &params->ip_address_binary);
params->port = port;
params->protocol_handlers = protocol_handlers;
// start on a separate thread
pthread_create(&server_pthread, NULL, libp2p_server_listen, params);
return 1;
}
/***
* Shut down the server started by libp2p_net_start_server
* @returns true(1) on success, false(0) otherwise
*/
int libp2p_net_server_stop() {
server_shutting_down = 1;
pthread_join(server_pthread, NULL);
return 1;
}

9
secio/secio.c
View file

@ -1308,6 +1308,14 @@ int libp2p_secio_peek(void* stream_context) {
return ctx->stream->parent_stream->peek(ctx->stream->parent_stream->stream_context);
}
/***
* Read a certain amount of bytes from the network
* @param stream_context the secio context
* @param buffer where to put the bytes read
* @param buffer_size the size of the incoming buffer
* @param timeout_secs the network timeout
* @returns the number of bytes read.
*/
int libp2p_secio_read_raw(void* stream_context, uint8_t* buffer, int buffer_size, int timeout_secs) {
if (stream_context == NULL) {
return -1;
@ -1320,6 +1328,7 @@ int libp2p_secio_read_raw(void* stream_context, uint8_t* buffer, int buffer_size
}
ctx->buffered_message_pos = 0;
}
// max_to_read is the lesser of bytes read or buffer_size
int max_to_read = (buffer_size > ctx->buffered_message->data_size ? ctx->buffered_message->data_size : buffer_size);
memcpy(buffer, &ctx->buffered_message->data[ctx->buffered_message_pos], max_to_read);
ctx->buffered_message_pos += max_to_read;

10
test/test_net.h Normal file
View file

@ -0,0 +1,10 @@
#include <stdio.h>
#include "libp2p/net/server.h"
int test_net_server_startup_shutdown() {
libp2p_net_server_start("127.0.0.1", 1234, NULL);
sleep(5);
libp2p_net_server_stop();
return 1;
}

95
test/test_yamux.h
View file

@ -5,6 +5,7 @@
#include "libp2p/utils/logger.h"
#include "libp2p/net/stream.h"
#include "libp2p/net/multistream.h"
#include "libp2p/net/server.h"
/***
* Helpers
@ -50,6 +51,24 @@ int mock_identify_read_protocol(void* context, struct StreamMessage** msg, int n
return 1;
}
/***
* Sends back the identify protocol (in a yamux wrapper) to fake negotiation
*/
int mock_multistream_read_protocol(void* context, struct StreamMessage** msg, int network_timeout) {
struct StreamMessage message;
const char* id = "/multistream/1.0.0\n";
message.data_size = strlen(id);
message.data = (uint8_t*)id;
*msg = libp2p_yamux_prepare_to_send(&message);
// adjust the frame
struct yamux_frame* frame = (struct yamux_frame*)(*msg)->data;
frame->streamid = 1;
frame->flags = yamux_frame_syn;
encode_frame(frame);
return 1;
}
int mock_counter = 0;
/***
@ -137,6 +156,43 @@ int test_yamux_identify() {
return retVal;
}
/***
* Attempt to add a protocol to the Yamux protocol
*/
/*
int test_yamux_multistream() {
int retVal = 0;
// setup
// mock
struct Stream* mock_stream = mock_stream_new();
mock_stream->read = mock_yamux_read_protocol;
// protocol handlers
struct Libp2pVector* protocol_handlers = libp2p_utils_vector_new(1);
struct Libp2pProtocolHandler* handler = libp2p_identify_build_protocol_handler(protocol_handlers);
libp2p_utils_vector_add(protocol_handlers, handler);
// yamux
struct Stream* yamux_stream = libp2p_yamux_stream_new(mock_stream, 0, protocol_handlers);
if (yamux_stream == NULL)
goto exit;
// Now add in another protocol
mock_stream->read = mock_multistream_read_protocol;
if (!libp2p_yamux_stream_add(yamux_stream->stream_context, libp2p_multistream_stream_new(yamux_stream))) {
goto exit;
}
// tear down
retVal = 1;
exit:
if (yamux_stream != NULL)
yamux_stream->close(yamux_stream);
libp2p_protocol_handlers_shutdown(protocol_handlers);
if (mock_message != NULL) {
libp2p_stream_message_free(mock_message);
mock_message = NULL;
}
return retVal;
}
*/
int test_yamux_incoming_protocol_request() {
int retVal = 0;
@ -270,3 +326,42 @@ int test_yamux_identity_frame() {
return retVal;
}
int test_yamux_client_server_connect() {
int retVal = 0;
struct Libp2pVector* protocol_handlers = NULL;
struct StreamMessage* resultMessage = NULL;
//libp2p_logger_add_class("connectionstream");
// setup
// build the protocol handler that can handle yamux
protocol_handlers = libp2p_utils_vector_new(1);
struct Libp2pProtocolHandler* handler = libp2p_yamux_build_protocol_handler(protocol_handlers);
libp2p_utils_vector_add(protocol_handlers, handler);
// set up server
libp2p_net_server_start("127.0.0.1", 1234, protocol_handlers);
sleep(1);
// set up client (easiest to use transport dialers)
struct Dialer* dialer = libp2p_conn_dialer_new(NULL, NULL, NULL);
struct MultiAddress* server_ma = multiaddress_new_from_string("/ip4/127.0.0.1/tcp/1234");
struct Stream* stream = libp2p_conn_dialer_get_connection(dialer, server_ma);
if (stream == NULL) {
fprintf(stderr, "Unable to get stream.\n");
goto exit;
}
// have client attempt to connect to server and negotiate yamux
struct Stream* yamux_stream = libp2p_yamux_stream_new(stream, 0, protocol_handlers);
if (yamux_stream == NULL) {
fprintf(stderr, "Was supposed to get yamux protocol id, but instead received nothing.\n");
goto exit;
}
retVal = 1;
exit:
libp2p_net_server_stop();
if (protocol_handlers != NULL) {
}
return retVal;
}

3
test/testit.c
View file

@ -14,6 +14,7 @@
#include "test_record.h"
#include "test_peer.h"
#include "test_yamux.h"
#include "test_net.h"
#include "libp2p/utils/logger.h"
struct test {
@ -117,6 +118,8 @@ int build_test_collection() {
add_test("test_yamux_stream_new", test_yamux_stream_new, 1);
add_test("test_yamux_identify", test_yamux_identify, 1);
add_test("test_yamux_incoming_protocol_request", test_yamux_incoming_protocol_request, 1);
add_test("test_net_server_startup_shutdown", test_net_server_startup_shutdown, 1);
add_test("test_yamux_client_server_connect", test_yamux_client_server_connect, 1);
return 1;
};

2
utils/Makefile
View file

@ -7,7 +7,7 @@ endif
LFLAGS =
DEPS =
OBJS = string_list.o vector.o linked_list.o logger.o urlencode.o
OBJS = string_list.o vector.o linked_list.o logger.o urlencode.o thread_pool.o
%.o: %.c $(DEPS)
$(CC) -c -o $@ $< $(CFLAGS)

555
utils/thread_pool.c Normal file
View file

@ -0,0 +1,555 @@
/* ********************************
* Author: Johan Hanssen Seferidis
* License: MIT
* Description: Library providing a threading pool where you can add
* work. For usage, check the thpool.h file or README.md
*
*//** @file thpool.h *//*
*
********************************/
#define _POSIX_C_SOURCE 200809L
#include <unistd.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
#include <errno.h>
#include <time.h>
#if defined(__linux__)
#include <sys/prctl.h>
#endif
#include "libp2p/utils/thread_pool.h"
#ifdef THPOOL_DEBUG
#define THPOOL_DEBUG 1
#else
#define THPOOL_DEBUG 0
#endif
#if !defined(DISABLE_PRINT) || defined(THPOOL_DEBUG)
#define err(str) fprintf(stderr, str)
#else
#define err(str)
#endif
static volatile int threads_keepalive;
static volatile int threads_on_hold;
/* ========================== STRUCTURES ============================ */
/* Binary semaphore */
typedef struct bsem {
pthread_mutex_t mutex;
pthread_cond_t cond;
int v;
} bsem;
/* Job */
typedef struct job{
struct job* prev; /* pointer to previous job */
void (*function)(void* arg); /* function pointer */
void* arg; /* function's argument */
} job;
/* Job queue */
typedef struct jobqueue{
pthread_mutex_t rwmutex; /* used for queue r/w access */
job *front; /* pointer to front of queue */
job *rear; /* pointer to rear of queue */
bsem *has_jobs; /* flag as binary semaphore */
int len; /* number of jobs in queue */
} jobqueue;
/* Thread */
typedef struct thread{
int id; /* friendly id */
pthread_t pthread; /* pointer to actual thread */
struct thpool_* thpool_p; /* access to thpool */
} thread;
/* Threadpool */
typedef struct thpool_{
thread** threads; /* pointer to threads */
volatile int num_threads_alive; /* threads currently alive */
volatile int num_threads_working; /* threads currently working */
pthread_mutex_t thcount_lock; /* used for thread count etc */
pthread_cond_t threads_all_idle; /* signal to thpool_wait */
jobqueue jobqueue; /* job queue */
} thpool_;
/* ========================== PROTOTYPES ============================ */
static int thread_init(thpool_* thpool_p, struct thread** thread_p, int id);
static void* thread_do(struct thread* thread_p);
static void thread_hold(int sig_id);
static void thread_destroy(struct thread* thread_p);
static int jobqueue_init(jobqueue* jobqueue_p);
static void jobqueue_clear(jobqueue* jobqueue_p);
static void jobqueue_push(jobqueue* jobqueue_p, struct job* newjob_p);
static struct job* jobqueue_pull(jobqueue* jobqueue_p);
static void jobqueue_destroy(jobqueue* jobqueue_p);
static void bsem_init(struct bsem *bsem_p, int value);
static void bsem_reset(struct bsem *bsem_p);
static void bsem_post(struct bsem *bsem_p);
static void bsem_post_all(struct bsem *bsem_p);
static void bsem_wait(struct bsem *bsem_p);
/* ========================== THREADPOOL ============================ */
/* Initialise thread pool */
struct thpool_* thpool_init(int num_threads){
threads_on_hold = 0;
threads_keepalive = 1;
if (num_threads < 0){
num_threads = 0;
}
/* Make new thread pool */
thpool_* thpool_p;
thpool_p = (struct thpool_*)malloc(sizeof(struct thpool_));
if (thpool_p == NULL){
err("thpool_init(): Could not allocate memory for thread pool\n");
return NULL;
}
thpool_p->num_threads_alive = 0;
thpool_p->num_threads_working = 0;
/* Initialise the job queue */
if (jobqueue_init(&thpool_p->jobqueue) == -1){
err("thpool_init(): Could not allocate memory for job queue\n");
free(thpool_p);
return NULL;
}
/* Make threads in pool */
thpool_p->threads = (struct thread**)malloc(num_threads * sizeof(struct thread *));
if (thpool_p->threads == NULL){
err("thpool_init(): Could not allocate memory for threads\n");
jobqueue_destroy(&thpool_p->jobqueue);
free(thpool_p);
return NULL;
}
pthread_mutex_init(&(thpool_p->thcount_lock), NULL);
pthread_cond_init(&thpool_p->threads_all_idle, NULL);
/* Thread init */
int n;
for (n=0; n<num_threads; n++){
thread_init(thpool_p, &thpool_p->threads[n], n);
#if THPOOL_DEBUG
printf("THPOOL_DEBUG: Created thread %d in pool \n", n);
#endif
}
/* Wait for threads to initialize */
while (thpool_p->num_threads_alive != num_threads) {}
return thpool_p;
}
/* Add work to the thread pool */
int thpool_add_work(thpool_* thpool_p, void (*function_p)(void*), void* arg_p){
job* newjob;
newjob=(struct job*)malloc(sizeof(struct job));
if (newjob==NULL){
err("thpool_add_work(): Could not allocate memory for new job\n");
return -1;
}
/* add function and argument */
newjob->function=function_p;
newjob->arg=arg_p;
/* add job to queue */
jobqueue_push(&thpool_p->jobqueue, newjob);
return 0;
}
/* Wait until all jobs have finished */
void thpool_wait(thpool_* thpool_p){
pthread_mutex_lock(&thpool_p->thcount_lock);
while (thpool_p->jobqueue.len || thpool_p->num_threads_working) {
pthread_cond_wait(&thpool_p->threads_all_idle, &thpool_p->thcount_lock);
}
pthread_mutex_unlock(&thpool_p->thcount_lock);
}
/* Destroy the threadpool */
void thpool_destroy(thpool_* thpool_p){
/* No need to destory if it's NULL */
if (thpool_p == NULL) return ;
volatile int threads_total = thpool_p->num_threads_alive;
/* End each thread 's infinite loop */
threads_keepalive = 0;
/* Give one second to kill idle threads */
double TIMEOUT = 1.0;
time_t start, end;
double tpassed = 0.0;
time (&start);
while (tpassed < TIMEOUT && thpool_p->num_threads_alive){
bsem_post_all(thpool_p->jobqueue.has_jobs);
time (&end);
tpassed = difftime(end,start);
}
/* Poll remaining threads */
while (thpool_p->num_threads_alive){
bsem_post_all(thpool_p->jobqueue.has_jobs);
sleep(1);
}
/* Job queue cleanup */
jobqueue_destroy(&thpool_p->jobqueue);
/* Deallocs */
int n;
for (n=0; n < threads_total; n++){
thread_destroy(thpool_p->threads[n]);
}
free(thpool_p->threads);
free(thpool_p);
}
/* Pause all threads in threadpool */
void thpool_pause(thpool_* thpool_p) {
int n;
for (n=0; n < thpool_p->num_threads_alive; n++){
pthread_kill(thpool_p->threads[n]->pthread, SIGUSR1);
}
}
/* Resume all threads in threadpool */
void thpool_resume(thpool_* thpool_p) {
// resuming a single threadpool hasn't been
// implemented yet, meanwhile this supresses
// the warnings
(void)thpool_p;
threads_on_hold = 0;
}
int thpool_num_threads_working(thpool_* thpool_p){
return thpool_p->num_threads_working;
}
/* ============================ THREAD ============================== */
/* Initialize a thread in the thread pool
*
* @param thread address to the pointer of the thread to be created
* @param id id to be given to the thread
* @return 0 on success, -1 otherwise.
*/
static int thread_init (thpool_* thpool_p, struct thread** thread_p, int id){
*thread_p = (struct thread*)malloc(sizeof(struct thread));
if (thread_p == NULL){
err("thread_init(): Could not allocate memory for thread\n");
return -1;
}
(*thread_p)->thpool_p = thpool_p;
(*thread_p)->id = id;
pthread_create(&(*thread_p)->pthread, NULL, (void *)thread_do, (*thread_p));
pthread_detach((*thread_p)->pthread);
return 0;
}
/* Sets the calling thread on hold */
static void thread_hold(int sig_id) {
(void)sig_id;
threads_on_hold = 1;
while (threads_on_hold){
sleep(1);
}
}
#if defined(__APPLE__) && defined(__MACH__)
int pthread_setname_np(const char* name);
#endif
/* What each thread is doing
*
* In principle this is an endless loop. The only time this loop gets interuppted is once
* thpool_destroy() is invoked or the program exits.
*
* @param thread thread that will run this function
* @return nothing
*/
static void* thread_do(struct thread* thread_p){
/* Set thread name for profiling and debuging */
char thread_name[128] = {0};
sprintf(thread_name, "thread-pool-%d", thread_p->id);
#if defined(__linux__)
/* Use prctl instead to prevent using _GNU_SOURCE flag and implicit declaration */
prctl(PR_SET_NAME, thread_name);
#elif defined(__APPLE__) && defined(__MACH__)
pthread_setname_np(thread_name);
#else
err("thread_do(): pthread_setname_np is not supported on this system");
#endif
/* Assure all threads have been created before starting serving */
thpool_* thpool_p = thread_p->thpool_p;
/* Register signal handler */
struct sigaction act;
sigemptyset(&act.sa_mask);
act.sa_flags = 0;
act.sa_handler = thread_hold;
if (sigaction(SIGUSR1, &act, NULL) == -1) {
err("thread_do(): cannot handle SIGUSR1");
}
/* Mark thread as alive (initialized) */
pthread_mutex_lock(&thpool_p->thcount_lock);
thpool_p->num_threads_alive += 1;
pthread_mutex_unlock(&thpool_p->thcount_lock);
while(threads_keepalive){
bsem_wait(thpool_p->jobqueue.has_jobs);
if (threads_keepalive){
pthread_mutex_lock(&thpool_p->thcount_lock);
thpool_p->num_threads_working++;
pthread_mutex_unlock(&thpool_p->thcount_lock);
/* Read job from queue and execute it */
void (*func_buff)(void*);
void* arg_buff;
job* job_p = jobqueue_pull(&thpool_p->jobqueue);
if (job_p) {
func_buff = job_p->function;
arg_buff = job_p->arg;
func_buff(arg_buff);
free(job_p);
}
pthread_mutex_lock(&thpool_p->thcount_lock);
thpool_p->num_threads_working--;
if (!thpool_p->num_threads_working) {
pthread_cond_signal(&thpool_p->threads_all_idle);
}
pthread_mutex_unlock(&thpool_p->thcount_lock);
}
}
pthread_mutex_lock(&thpool_p->thcount_lock);
thpool_p->num_threads_alive --;
pthread_mutex_unlock(&thpool_p->thcount_lock);
return NULL;
}
/* Frees a thread */
static void thread_destroy (thread* thread_p){
free(thread_p);
}
/* ============================ JOB QUEUE =========================== */
/* Initialize queue */
static int jobqueue_init(jobqueue* jobqueue_p){
jobqueue_p->len = 0;
jobqueue_p->front = NULL;
jobqueue_p->rear = NULL;
jobqueue_p->has_jobs = (struct bsem*)malloc(sizeof(struct bsem));
if (jobqueue_p->has_jobs == NULL){
return -1;
}
pthread_mutex_init(&(jobqueue_p->rwmutex), NULL);
bsem_init(jobqueue_p->has_jobs, 0);
return 0;
}
/* Clear the queue */
static void jobqueue_clear(jobqueue* jobqueue_p){
while(jobqueue_p->len){
free(jobqueue_pull(jobqueue_p));
}
jobqueue_p->front = NULL;
jobqueue_p->rear = NULL;
bsem_reset(jobqueue_p->has_jobs);
jobqueue_p->len = 0;
}
/* Add (allocated) job to queue
*/
static void jobqueue_push(jobqueue* jobqueue_p, struct job* newjob){
pthread_mutex_lock(&jobqueue_p->rwmutex);
newjob->prev = NULL;
switch(jobqueue_p->len){
case 0: /* if no jobs in queue */
jobqueue_p->front = newjob;
jobqueue_p->rear = newjob;
break;
default: /* if jobs in queue */
jobqueue_p->rear->prev = newjob;
jobqueue_p->rear = newjob;
}
jobqueue_p->len++;
bsem_post(jobqueue_p->has_jobs);
pthread_mutex_unlock(&jobqueue_p->rwmutex);
}
/* Get first job from queue(removes it from queue)
<<<<<<< HEAD
*
* Notice: Caller MUST hold a mutex
=======
>>>>>>> da2c0fe45e43ce0937f272c8cd2704bdc0afb490
*/
static struct job* jobqueue_pull(jobqueue* jobqueue_p){
pthread_mutex_lock(&jobqueue_p->rwmutex);
job* job_p = jobqueue_p->front;
switch(jobqueue_p->len){
case 0: /* if no jobs in queue */
break;
case 1: /* if one job in queue */
jobqueue_p->front = NULL;
jobqueue_p->rear = NULL;
jobqueue_p->len = 0;
break;
default: /* if >1 jobs in queue */
jobqueue_p->front = job_p->prev;
jobqueue_p->len--;
/* more than one job in queue -> post it */
bsem_post(jobqueue_p->has_jobs);
}
pthread_mutex_unlock(&jobqueue_p->rwmutex);
return job_p;
}
/* Free all queue resources back to the system */
static void jobqueue_destroy(jobqueue* jobqueue_p){
jobqueue_clear(jobqueue_p);
free(jobqueue_p->has_jobs);
}
/* ======================== SYNCHRONISATION ========================= */
/* Init semaphore to 1 or 0 */
static void bsem_init(bsem *bsem_p, int value) {
if (value < 0 || value > 1) {
err("bsem_init(): Binary semaphore can take only values 1 or 0");
exit(1);
}
pthread_mutex_init(&(bsem_p->mutex), NULL);
pthread_cond_init(&(bsem_p->cond), NULL);
bsem_p->v = value;
}
/* Reset semaphore to 0 */
static void bsem_reset(bsem *bsem_p) {
bsem_init(bsem_p, 0);
}
/* Post to at least one thread */
static void bsem_post(bsem *bsem_p) {
pthread_mutex_lock(&bsem_p->mutex);
bsem_p->v = 1;
pthread_cond_signal(&bsem_p->cond);
pthread_mutex_unlock(&bsem_p->mutex);
}
/* Post to all threads */
static void bsem_post_all(bsem *bsem_p) {
pthread_mutex_lock(&bsem_p->mutex);
bsem_p->v = 1;
pthread_cond_broadcast(&bsem_p->cond);
pthread_mutex_unlock(&bsem_p->mutex);
}
/* Wait on semaphore until semaphore has value 0 */
static void bsem_wait(bsem* bsem_p) {
pthread_mutex_lock(&bsem_p->mutex);
while (bsem_p->v != 1) {
pthread_cond_wait(&bsem_p->cond, &bsem_p->mutex);
}
bsem_p->v = 0;
pthread_mutex_unlock(&bsem_p->mutex);
}

5
yamux/session.c
View file

@ -280,13 +280,18 @@ int yamux_decode(void* context, const uint8_t* incoming, size_t incoming_size, s
memcpy(msg->data, &incoming[sizeof(struct yamux_frame)], msg->data_size);
}
// if we didn't initiate it, add this new channel (odd stream id is from client, even is from server)
if ( (f.streamid % 2 == 0 && yamuxContext->am_server) || (f.streamid % 2 == 1 && yamuxContext->am_server) ) {
struct Stream* yamuxChannelStream = yamux_channel_new(yamuxContext, f.streamid, msg);
if (yamuxChannelStream == NULL)
return -EPROTO;
struct YamuxChannelContext* channelContext = (struct YamuxChannelContext*)yamuxChannelStream->stream_context;
if (yamux_session->new_stream_fn)
yamux_session->new_stream_fn(yamuxContext, yamuxContext->stream, msg);
channelContext->state = yamux_stream_syn_recv;
}
*return_message = msg;
}
else

71
yamux/yamux.c
View file

@ -272,6 +272,24 @@ int libp2p_yamux_write(void* stream_context, struct StreamMessage* message) {
return retVal;
}
/***
* Given a context, get the YamuxContext
* @param stream_context a YamuxChannelContext or a YamuxContext
* @returns the YamuxContext, or NULL on error
*/
struct YamuxContext* libp2p_yamux_get_context(void* stream_context) {
char proto = ((uint8_t*)stream_context)[0];
struct YamuxChannelContext* channel = NULL;
struct YamuxContext* ctx = NULL;
if (proto == YAMUX_CHANNEL_CONTEXT) {
channel = (struct YamuxChannelContext*)stream_context;
ctx = channel->yamux_context;
} else if (proto == YAMUX_CONTEXT) {
ctx = (struct YamuxContext*)stream_context;
}
return ctx;
}
/***
* Check to see if there is anything waiting on the network.
* @param stream_context the YamuxContext
@ -281,7 +299,7 @@ int libp2p_yamux_peek(void* stream_context) {
if (stream_context == NULL)
return -1;
struct YamuxContext* ctx = (struct YamuxContext*)stream_context;
struct YamuxContext* ctx = libp2p_yamux_get_context(stream_context);
struct Stream* parent_stream = ctx->stream->parent_stream;
if (parent_stream == NULL)
return -1;
@ -289,9 +307,41 @@ int libp2p_yamux_peek(void* stream_context) {
return parent_stream->peek(parent_stream->stream_context);
}
/***
* Read from the network, and place it in the buffer
* NOTE: This may put something in the internal read buffer (i.e. buffer_size is too small)
* @param stream_context the yamux context
* @param buffer the buffer
* @param buffer_size the size of the incoming buffer (max number of bytes to read)
* @param timeout_secs timeout
* @returns number of bytes read.
*/
int libp2p_yamux_read_raw(void* stream_context, uint8_t* buffer, int buffer_size, int timeout_secs) {
//TODO: Implement
if (stream_context == NULL) {
return -1;
}
struct YamuxContext* ctx = libp2p_yamux_get_context(stream_context);
if (ctx->buffered_message_pos == -1) {
// we need to get info from the network
if (!ctx->stream->read(ctx->stream->stream_context, &ctx->buffered_message, timeout_secs)) {
return -1;
}
ctx->buffered_message_pos = 0;
}
// max_to_read is the lesser of bytes read or buffer_size
int max_to_read = (buffer_size > ctx->buffered_message->data_size ? ctx->buffered_message->data_size : buffer_size);
memcpy(buffer, &ctx->buffered_message->data[ctx->buffered_message_pos], max_to_read);
ctx->buffered_message_pos += max_to_read;
if (ctx->buffered_message_pos == ctx->buffered_message->data_size) {
// we read everything
libp2p_stream_message_free(ctx->buffered_message);
ctx->buffered_message = NULL;
ctx->buffered_message_pos = -1;
} else {
// we didn't read everything.
ctx->buffered_message_pos = max_to_read;
}
return max_to_read;
}
/**
@ -308,11 +358,14 @@ struct YamuxContext* libp2p_yamux_context_new(struct Stream* stream) {
ctx->session = yamux_session_new(NULL, stream, yamux_session_server, NULL);
ctx->am_server = 0;
ctx->state = 0;
ctx->buffered_message = NULL;
ctx->buffered_message_pos = -1;
ctx->protocol_handlers = NULL;
}
return ctx;
}
int libp2p_yamux_negotiate(struct YamuxContext* ctx) {
int libp2p_yamux_negotiate(struct YamuxContext* ctx, int am_server) {
const char* protocolID = "/yamux/1.0.0\n";
struct StreamMessage outgoing;
struct StreamMessage* results = NULL;
@ -320,7 +373,8 @@ int libp2p_yamux_negotiate(struct YamuxContext* ctx) {
int haveTheirs = 0;
int peek_result = 0;
// see if they're trying to send something first
// see if they're trying to send something first (only if we're the client)
if (!am_server) {
peek_result = libp2p_yamux_peek(ctx);
if (peek_result > 0) {
libp2p_logger_debug("yamux", "There is %d bytes waiting for us. Perhaps it is the yamux header we're expecting.\n", peek_result);
@ -338,6 +392,7 @@ int libp2p_yamux_negotiate(struct YamuxContext* ctx) {
results = NULL;
haveTheirs = 1;
}
}
// send the protocol id
outgoing.data = (uint8_t*)protocolID;
@ -348,7 +403,7 @@ int libp2p_yamux_negotiate(struct YamuxContext* ctx) {
}
// wait for them to send the protocol id back
if (!haveTheirs) {
if (!am_server && !haveTheirs) {
// expect the same back
ctx->stream->parent_stream->read(ctx->stream->parent_stream->stream_context, &results, yamux_default_timeout);
if (results == NULL || results->data_size == 0) {
@ -430,7 +485,7 @@ struct Stream* libp2p_yamux_stream_new(struct Stream* parent_stream, int am_serv
ctx->am_server = am_server;
ctx->protocol_handlers = protocol_handlers;
// attempt to negotiate yamux protocol
if (!libp2p_yamux_negotiate(ctx)) {
if (!libp2p_yamux_negotiate(ctx, am_server)) {
libp2p_yamux_stream_free(out);
return NULL;
}
@ -463,6 +518,10 @@ int libp2p_yamux_channel_close(void* context) {
void libp2p_yamux_context_free(struct YamuxContext* ctx) {
if (ctx == NULL)
return;
if (ctx->buffered_message != NULL) {
libp2p_stream_message_free(ctx->buffered_message);
ctx->buffered_message = NULL;
}
// free all the channels
if (ctx->channels) {
for(int i = 0; i < ctx->channels->total; i++) {