c-ipfs/core/null.c

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#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
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#include <unistd.h>
#include <pthread.h>
#include "libp2p/net/p2pnet.h"
#include "libp2p/record/message.h"
#include "libp2p/net/multistream.h"
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#include "ipfs/core/daemon.h"
#include "ipfs/routing/routing.h"
#include "ipfs/core/ipfs_node.h"
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#define BUF_SIZE 4096
/**
* We've received a connection. Find out what they want
*/
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void *ipfs_null_connection (void *ptr)
{
struct null_connection_params *connection_param = NULL;
struct s_ipfs_routing* routing = NULL;
struct Stream* stream = NULL;
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connection_param = (struct null_connection_params*) ptr;
// TODO: multistream + secio + message.
// TODO: when should we exit the for loop and disconnect?
stream = libp2p_net_multistream_stream_new(connection_param->socket);
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fprintf(stderr, "Connection %d, count %d\n", connection_param->socket, *(connection_param->count));
if (libp2p_net_multistream_negotiate(stream)) {
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routing = ipfs_routing_new_online(connection_param->local_node, &connection_param->local_node->identity->private_key, stream);
for(;;) {
struct Libp2pMessage* msg = libp2p_net_multistream_get_message(stream);
if (msg != NULL) {
switch(msg->message_type) {
case (MESSAGE_TYPE_PING):
routing->Ping(routing, msg);
break;
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case (MESSAGE_TYPE_GET_VALUE): {
unsigned char* val;
size_t val_size = 0;
routing->GetValue(routing, msg->key, msg->key_size, (void**)&val, &val_size);
if (val == NULL) {
stream->write(stream, 0, 1);
} else {
stream->write(stream, val, val_size);
}
break;
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}
default:
break;
}
} else {
break;
}
}
}
/*
len = socket_read(connection_param->socket, b, sizeof(b)-1, 0);
if (len > 0) {
while (b[len-1] == '\r' || b[len-1] == '\n') len--;
b[len] = '\0';
fprintf(stderr, "Recv: '%s'\n", b);
if (strcmp (b, "ping") == 0) {
socket_write(connection_param->socket, "pong", 4, 0);
}
} else if(len < 0) {
break;
}
*/
if (stream != NULL) {
stream->close(stream);
}
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(*(connection_param->count))--; // update counter.
free (connection_param);
return (void*) 1;
}
void *ipfs_null_listen (void *ptr)
{
int socketfd, s, count = 0;
pthread_t pth_connection;
struct IpfsNodeListenParams *listen_param;
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struct null_connection_params *connection_param;
listen_param = (struct IpfsNodeListenParams*) ptr;
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if ((socketfd = socket_listen(socket_tcp4(), &(listen_param->ipv4), &(listen_param->port))) <= 0) {
perror("fail to init null router.");
exit (1);
}
fprintf(stderr, "Null listening on %d\n", listen_param->port);
for (;;) {
s = socket_accept4(socketfd, &(listen_param->ipv4), &(listen_param->port));
if (count >= CONNECTIONS) { // limit reached.
close (s);
continue;
}
count++;
connection_param = malloc (sizeof (struct null_connection_params));
if (connection_param) {
connection_param->socket = s;
connection_param->count = &count;
connection_param->local_node = listen_param->local_node;
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// Create pthread for ipfs_null_connection.
if (pthread_create(&pth_connection, NULL, ipfs_null_connection, connection_param)) {
fprintf(stderr, "Error creating thread for connection %d\n", count);
close (s);
} else {
pthread_detach (pth_connection);
}
}
}
return (void*) 2;
}