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 "ipfs/core/daemon.h"
#define BUF_SIZE 4096
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void *ipfs_null_connection (void *ptr)
{
struct null_connection_params *connection_param;
char b[BUF_SIZE];
int len;
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connection_param = (struct null_connection_params*) ptr;
// TODO: multistream + secio + message.
fprintf(stderr, "Connection %d, count %d\n", connection_param->socket, *(connection_param->count));
for(;;) {
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;
}
}
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close (connection_param->socket); // close socket.
(*(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;
// 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;
}