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debugging yamux and go

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This commit is contained in:
John Jones 2017-11-27 09:06:33 -05:00
parent 13f51260b2
commit 7c62bdfbb7
8 changed files with 81 additions and 39 deletions
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2
conn/dialer.c
View file

@ -132,7 +132,7 @@ int libp2p_conn_dialer_join_swarm(const struct Dialer* dialer, struct Libp2pPeer
peer->sessionContext->default_stream = new_stream;
// we have our swarm connection. Now we ask for some "channels"
// id over yamux
libp2p_yamux_stream_add(new_stream->stream_context, libp2p_identify_stream_new(new_stream));
//libp2p_yamux_stream_add(new_stream->stream_context, libp2p_identify_stream_new(new_stream));
// kademlia over yamux
//libp2p_yamux_stream_add(new_stream->stream_context, libp2p_kademlia_stream_new(new_stream));
// circuit relay over yamux

5
identify/identify.c
View file

@ -18,6 +18,8 @@
* @returns true(1) if it can handle this message, false(0) if not
*/
int libp2p_identify_can_handle(const struct StreamMessage* msg) {
if (msg == NULL || msg->data_size == 0 || msg->data == 0)
return 0;
const char *protocol = "/ipfs/id/1.0.0\n";
int protocol_size = strlen(protocol);
// is there a varint in front?
@ -374,7 +376,8 @@ struct Stream* libp2p_identify_stream_new(struct Stream* parent_stream) {
out->stream_context = ctx;
out->close = libp2p_identify_close;
out->negotiate = libp2p_identify_stream_new;
if (!libp2p_identify_send_protocol(parent_stream) || !libp2p_identify_receive_protocol(parent_stream)) {
// do we expect a reply?
if (!libp2p_identify_send_protocol(parent_stream) /* || !libp2p_identify_receive_protocol(parent_stream) */) {
libp2p_stream_free(out);
free(ctx);
return NULL;

17
net/multistream.c
View file

@ -25,6 +25,8 @@ int multistream_default_timeout = 5;
*/
int libp2p_net_multistream_can_handle(const struct StreamMessage* msg) {
if (msg == NULL || msg->data == NULL || msg->data_size == 0)
return 0;
char *protocol = "/multistream/1.0.0\n";
int protocol_size = strlen(protocol);
unsigned char* incoming = msg->data;
@ -394,6 +396,20 @@ struct Stream* libp2p_net_multistream_handshake(struct Stream* stream) {
return NULL;
}
/***
* The protocol above is asking for an upgrade
* @param multistream this stream (a multistream)
* @param new_stream the protocol above
* @returns true(1) on success, false(0) otherwise
*/
int libp2p_net_multistream_handle_upgrade(struct Stream* multistream, struct Stream* new_stream) {
// take multistream out of the picture
if (new_stream->parent_stream == multistream) {
new_stream->parent_stream = multistream->parent_stream;
}
return 1;
}
/**
* Create a new MultiStream structure
* @param parent_stream the stream
@ -411,6 +427,7 @@ struct Stream* libp2p_net_multistream_stream_new(struct Stream* parent_stream, i
out->peek = libp2p_net_multistream_peek;
out->read_raw = libp2p_net_multistream_read_raw;
out->negotiate = libp2p_net_multistream_handshake;
out->handle_upgrade = libp2p_net_multistream_handle_upgrade;
out->address = parent_stream->address;
// build MultistreamContext
struct MultistreamContext* ctx = (struct MultistreamContext*) malloc(sizeof(struct MultistreamContext));

24
peer/peer.c
View file

@ -104,30 +104,6 @@ int libp2p_peer_connect(const struct Dialer* dialer, struct Libp2pPeer* peer, st
peer->connection_type = CONNECTION_TYPE_NOT_CONNECTED;
libp2p_logger_debug("peer", "Attemping to connect to %s.\n", libp2p_peer_id_to_string(peer));
return libp2p_conn_dialer_join_swarm(dialer, peer, timeout);
/*
time_t now, prev = time(NULL);
// find an appropriate address
struct Libp2pLinkedList* current_address = peer->addr_head;
while (current_address != NULL && peer->connection_type != CONNECTION_TYPE_CONNECTED) {
struct MultiAddress *ma = (struct MultiAddress*)current_address->item;
// use the dialer to attempt to dial this MultiAddress and join the swarm
struct Stream* yamux_stream = libp2p_conn_dialer_get_stream(dialer, ma, "yamux");
if (yamux_stream != NULL) {
// we're okay, get out
peer->connection_type = CONNECTION_TYPE_CONNECTED;
break;
}
now = time(NULL);
if (now >= (prev + timeout))
break;
current_address = current_address->next;
} // trying to connect
int retVal = (peer->connection_type == CONNECTION_TYPE_CONNECTED);
if (!retVal) {
libp2p_logger_debug("peer", "Attempted connect to %s but failed.\n", libp2p_peer_id_to_string(peer));
}
return retVal;
*/
}
/**

2
routing/dht_protocol.c
View file

@ -16,6 +16,8 @@
*/
int libp2p_routing_dht_can_handle(const struct StreamMessage* msg) {
if (msg == NULL || msg->data_size == 0 || msg->data == NULL)
return 0;
if (msg->data_size < 8)
return 0;
char* result = strnstr((char*)msg->data, "/ipfs/kad", msg->data_size);

2
secio/secio.c
View file

@ -36,6 +36,8 @@ const char* SupportedCiphers = "AES-256,AES-128,Blowfish";
const char* SupportedHashes = "SHA256,SHA512";
int libp2p_secio_can_handle(const struct StreamMessage* msg) {
if (msg == NULL || msg->data_size == 0 || msg->data == NULL)
return 0;
const char* protocol = "/secio/1.0.0";
// sanity checks
if (msg->data_size < 12)

54
yamux/session.c
View file

@ -116,7 +116,7 @@ ssize_t yamux_session_close(struct yamux_session* session, enum yamux_error err)
}
/***
* Ping
* Respond to a Ping
* @param session the session to ping
* @param value the value to send
* @param pong true(1) if we should send the ack, false(0) if we should send the syn (who's side are we on?)
@ -141,7 +141,7 @@ ssize_t yamux_session_ping(struct yamux_session* session, uint32_t value, int po
struct StreamMessage outgoing;
outgoing.data = (uint8_t*)&f;
outgoing.data_size = sizeof(struct yamux_frame);
if (!session->parent_stream->write(session->parent_stream->stream_context, &outgoing))
if (!session->parent_stream->parent_stream->write(session->parent_stream->parent_stream->stream_context, &outgoing))
return 0;
return outgoing.data_size;
}
@ -180,13 +180,18 @@ int yamux_decode(void* context, const uint8_t* incoming, size_t incoming_size, s
decode_frame(&f);
// check yamux version
if (f.version != YAMUX_VERSION)
if (f.version != YAMUX_VERSION) {
libp2p_logger_error("yamux", "Incorrect Yamux version. Expected %d but received %d.\n", YAMUX_VERSION, f.version);
return 0;
}
if (!f.streamid) // we're not dealing with a stream, we're dealing with something at the yamux protocol level
if (!f.streamid) {// we're not dealing with a stream, we're dealing with something at the yamux protocol level
libp2p_logger_debug("yamux", "Received frame with no stream id. We must need to do something at the protocol level.\n");
switch (f.type)
{
case yamux_frame_ping: // ping
case yamux_frame_ping: {
// ping
libp2p_logger_debug("yamux", "Received a ping.\n");
if (f.flags & yamux_frame_syn)
{
yamux_session_ping(yamux_session, f.length, 1);
@ -214,15 +219,22 @@ int yamux_decode(void* context, const uint8_t* incoming, size_t incoming_size, s
else
return -EPROTO;
break;
case yamux_frame_go_away: // go away (hanging up)
}
case yamux_frame_go_away: {
// go away (hanging up)
libp2p_logger_debug("yamux", "Received a \"go away\".\n");
yamux_session->closed = 1;
if (yamux_session->go_away_fn)
yamux_session->go_away_fn(yamux_session, (enum yamux_error)f.length);
break;
default:
}
default: {
libp2p_logger_debug("yamux", "We thought we needed to do something at the yamux protocol level, but the flags didn't match up.\n");
return -EPROTO;
}
else { // we're handling a stream, not something at the yamux protocol level
}
} else {
// we're handling a stream, not something at the yamux protocol level
for (size_t i = 0; i < yamux_session->cap_streams; ++i)
{
struct yamux_session_stream* ss = &yamux_session->streams[i];
@ -233,8 +245,10 @@ int yamux_decode(void* context, const uint8_t* incoming, size_t incoming_size, s
if (s->id == f.streamid) // we have a match between the stored stream and the current stream
{
libp2p_logger_debug("yamux", "We found our stream id.\n");
if (f.flags & yamux_frame_rst)
{
libp2p_logger_debug("yamux", "They are asking that this stream be reset.\n");
// close the stream
s->state = yamux_stream_closed;
@ -243,6 +257,7 @@ int yamux_decode(void* context, const uint8_t* incoming, size_t incoming_size, s
}
else if (f.flags & yamux_frame_fin)
{
libp2p_logger_debug("yamux", "They are asking that this stream be closed.\n");
// local stream didn't initiate FIN
if (s->state != yamux_stream_closing)
yamux_stream_close(context);
@ -254,16 +269,22 @@ int yamux_decode(void* context, const uint8_t* incoming, size_t incoming_size, s
}
else if (f.flags & yamux_frame_ack)
{
libp2p_logger_debug("yamux", "They sent an ack.\n");
// acknowldegement
if (s->state != yamux_stream_syn_sent)
if (s->state != yamux_stream_syn_sent) {
libp2p_logger_debug("yamux", "We received an ack, but it seems we never sent anything!\n");
return -EPROTO;
}
s->state = yamux_stream_est;
}
else if (f.flags)
else if (f.flags) {
libp2p_logger_debug("yamux", "They sent no flags. I don't know what to do. Erroring out.\n");
return -EPROTO;
}
int sz = sizeof(struct yamux_frame);
libp2p_logger_debug("yamux", "Processing frame of %d bytes.\n");
ssize_t re = yamux_stream_process(s, &f, &incoming[sz], incoming_size - sz);
return (re < 0) ? re : (re + incoming_size);
}
@ -273,16 +294,21 @@ int yamux_decode(void* context, const uint8_t* incoming, size_t incoming_size, s
// It must not exist yet, so let's try to make it
if (f.flags & yamux_frame_syn)
{
libp2p_logger_debug("yamux", "Looks like we have a new stream coming in. Stream %d.\n", f.streamid);
struct StreamMessage* msg = libp2p_stream_message_new();
if (incoming_size > sizeof(struct yamux_frame)) {
msg->data_size = incoming_size - sizeof(struct yamux_frame);
libp2p_logger_debug("yamux", "Stream %d has data after the frame, with a length of %d.\n", f.streamid, msg->data_size);
msg->data = malloc(msg->data_size);
memcpy(msg->data, &incoming[sizeof(struct yamux_frame)], msg->data_size);
} else {
libp2p_logger_debug("yamux", "Stream %d has no extra data after the frame.\n", f.streamid);
}
// 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) ) {
if ( (f.streamid % 2 == 0 && !yamuxContext->am_server) || (f.streamid % 2 == 1 && yamuxContext->am_server) ) {
libp2p_logger_debug("yamux", "This is a new channel. Creating it...\n");
struct Stream* yamuxChannelStream = yamux_channel_new(yamuxContext, f.streamid, msg);
if (yamuxChannelStream == NULL) {
libp2p_logger_error("yamux", "session->yamux_decode: Unable to create new yamux channel for stream id %d.\n", f.streamid);
@ -296,12 +322,16 @@ int yamux_decode(void* context, const uint8_t* incoming, size_t incoming_size, s
}
channelContext->state = yamux_stream_syn_recv;
} else {
libp2p_logger_debug("yamux", "I thought this was supposed to be a new channel, but the numbering is off. The stream number is %d, and I am a %s", f.streamid, (yamuxContext->am_server ? "server" : "client)"));
}
*return_message = msg;
}
else
else {
libp2p_logger_error("yamux", "We had a (probably) new frame, but the flags didn't seem right.");
return -EPROTO;
}
}
return 0;
}

14
yamux/yamux.c
View file

@ -52,6 +52,8 @@ struct YamuxContext* libp2p_yamux_get_context(void* stream_context) {
* @returns true(1) if it can handle this message, false(0) if not
*/
int yamux_can_handle(const struct StreamMessage* msg) {
if (msg == NULL || msg->data_size == 0 || msg->data == NULL)
return 0;
char *protocol = "/yamux/1.0.0\n";
int protocol_size = strlen(protocol);
// is there a varint in front?
@ -254,6 +256,7 @@ int libp2p_yamux_read(void* stream_context, struct StreamMessage** message, int
struct Stream* parent_stream = libp2p_yamux_get_parent_stream(stream_context);
if (channel != NULL && channel->channel != 0) {
libp2p_logger_debug("yamux", "Data received on yamux stream %d.\n", channel->channel);
// we have an established channel. Use it.
if (!parent_stream->read(parent_stream->stream_context, message, yamux_default_timeout)) {
libp2p_logger_error("yamux", "Read: Attepted to read from channel %d, but the read failed.\n", channel->channel);
@ -270,6 +273,7 @@ int libp2p_yamux_read(void* stream_context, struct StreamMessage** message, int
}
libp2p_logger_error("yamux", "yamux_decode returned error.\n");
} else if (ctx != NULL) {
libp2p_logger_debug("yamux", "read: It looks like we're trying to negotiate a new protocol.\n");
// We are still negotiating. They are probably attempting to negotiate a new protocol
struct StreamMessage* incoming = NULL;
if (parent_stream->read(parent_stream->stream_context, &incoming, yamux_default_timeout)) {
@ -277,6 +281,12 @@ int libp2p_yamux_read(void* stream_context, struct StreamMessage** message, int
// parse the frame
if (yamux_decode(ctx, incoming->data, incoming->data_size, message) == 0) {
libp2p_stream_message_free(incoming);
// The message may not have anything in it. If so, return 0, as if nothing was done. Everything has been handled
if (*message != NULL && (*message)->data_size == 0) {
libp2p_stream_message_free(*message);
*message = NULL;
return 0;
}
return 1;
}
libp2p_logger_error("yamux", "yamux_decode returned error.\n");
@ -494,7 +504,7 @@ int libp2p_yamux_negotiate(struct YamuxContext* ctx, int am_server) {
// send the protocol id
outgoing.data = (uint8_t*)protocolID;
outgoing.data_size = strlen(protocolID);
libp2p_logger_debug("yamux", "Attempting to write the yamux protocol id.\n");
libp2p_logger_debug("yamux", "Attempting to write the yamux protocol id as %s.\n", (am_server ? "server" : "client"));
if (!ctx->stream->parent_stream->write(ctx->stream->parent_stream->stream_context, &outgoing)) {
libp2p_logger_error("yamux", "We attempted to write the yamux protocol id, but the write call failed.\n");
goto exit;
@ -594,6 +604,8 @@ struct Stream* libp2p_yamux_stream_new(struct Stream* parent_stream, int am_serv
libp2p_yamux_stream_free(out);
return NULL;
}
// tell protocol below that we want to upgrade
parent_stream->handle_upgrade(parent_stream, out);
}
return out;
}