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read_peer_lists.cpp
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read_peer_lists.cpp
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//clear; rm -frv read_peer_lists.o; clear; g++-7 -g -fPIC -Wall -c read_peer_lists.cpp
//C_C++ Header
#include <dirent.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <stdio.h>
#include <string>
#include <string.h>
#include <cstring>
//algorithm fürs string klein machen
#include <algorithm>
//Zum Casten von Char Hex Array nach string (bei md5sum)
#include <iomanip>
#include <iostream>
#include <vector>
#include <sys/time.h>
#include <sstream>
#include <fstream>
#include <pthread.h>
#include <thread>
#include <time.h>
//Network Header
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <netdb.h>
#include <string.h>
#include <stdlib.h>
#include <vector>
//TLS
#include <tls.h>
using namespace std;
extern vector<string> peer_lists;
extern vector<string> config_file_parameter;
extern string lokal_ip_adresse;
void read_peer_lists()
{
//cout<<"\e[1m"<<"read_peer_lists.cpp"<<"\e[0m"<<endl;
//peer_lists.push_back("PEER 1");
//Liste aus Datei lesen
ifstream fileoperation_conf;
fileoperation_conf.open("/etc/blockchain/peer_lists.cfg", ios::in);
string config_parameter = "";
//string config_parameter_2 = "";
//int gleich_gefunden = 0;
while (!fileoperation_conf.eof())
{
getline(fileoperation_conf, config_parameter);
//cout<<"config_parameter: "<<config_parameter<<endl;
//Filter der einzelnen Parameter######
if (config_parameter == "")
{
//cout<<"leer config_parameter_2"<<config_parameter<<endl;
continue;
}
/*
gleich_gefunden = config_parameter.find_last_of("=");
//cout<<"config_parameter: "<<config_parameter.substr(gleich_gefunden + 1 ,99)<<endl;
config_parameter_2 = config_parameter.substr(gleich_gefunden + 2 ,999); //auskommentiert
//cout<<config_parameter_2<<endl;
config_file_parameter.push_back(config_parameter_2);
*/
peer_lists.push_back(config_parameter);
}
fileoperation_conf.close();
//###########################################################################################
//Peer Liste von den Peers erfragen
//Alle Peers einzelnt anfragen. Peerliste abgleichen
int anzahl_peers_aus_datei = 0;
anzahl_peers_aus_datei = peer_lists.size();
//cout<<"anzahl_peers_aus_datei#"<<anzahl_peers_aus_datei<<endl;
for (int i = 0; i < anzahl_peers_aus_datei; i++)
{
//string bc_peer = "127.0.0.1";
//string bc_peer_port = "6379";
string bc_peer;
//string bc_peer_port = "8888";
string bc_peer_port = config_file_parameter[1];
bc_peer = peer_lists[i];
if (bc_peer == lokal_ip_adresse)
{
//cout<<"Eigene IP"<<endl;
continue;
}
//TLS Initialisierung################################
//gnuTLS Initilisieren
int tls_init_status = 666;
tls_init_status = tls_init();
//cout<<"tls_init_status read_peer_lists.cpp#"<<tls_init_status<<endl;
//###
struct tls *tls = NULL;
tls = tls_client();
//cout<<"tls_client read_peer_lists.cpp#"<<tls<<endl;
//###
struct tls_config *config = NULL;
config = tls_config_new();
//cout<<"tls_config_new read_peer_lists.cpp#"<<config<<endl;
//###
tls_config_insecure_noverifycert(config);
tls_config_insecure_noverifyname(config);
tls_configure(tls, config);
//##################################################
/*
//string bc_peer = "127.0.0.1";
//string bc_peer_port = "6379";
string bc_peer;
//string bc_peer_port = "8888";
string bc_peer_port = config_file_parameter[1];
bc_peer = peer_lists[i];
*/
//bc_peer = "172.17.190.80";
//cout<<"bc_peer#"<<bc_peer<<endl;
//cout<<"Lese vorhandene Block Ketten ein"<<endl;
struct hostent *host;//Hostname struktuieren
host = gethostbyname(bc_peer.c_str()); //eventuell die IP in DNS Namen umwandeln
struct sockaddr_in addr;
addr.sin_addr = *(struct in_addr*)host->h_addr;
int s11;
s11 = socket(PF_INET, SOCK_STREAM, 0); //Socket aufbauen. wenn -1 dann ist fehlgeschlagen
int bc_peer_port_int = atoi(bc_peer_port.c_str());
addr.sin_port = htons(bc_peer_port_int);//Connection Portnummer des Servers festlegen
addr.sin_family = AF_INET;
struct timeval timeout;
timeout.tv_sec = 1;
timeout.tv_usec = 0;
setsockopt (s11, SOL_SOCKET, SO_SNDTIMEO, &timeout, sizeof (timeout));
setsockopt (s11, SOL_SOCKET, SO_RCVTIMEO, &timeout, sizeof (timeout));
int connect_status = 666;
connect_status = connect(s11,(struct sockaddr*)&addr, sizeof(addr)); //http://pubs.opengroup.org/onlinepubs/009695399/functions/connect.html
//cout<<"connect_status read_peer_lists.cpp #"<<connect_status<<endl;
if (connect_status == -1)
{
//cout<<"Socket error auf der Gegenseite# "<<connect_status<<endl;
//cout<<"bc_peer read_peer_lists.cpp"<<bc_peer<<endl;
continue;
}
//Redis Command Anzahl der Werte in der Liste
//string bc_command = "LLEN blockchain_list\r\n";
string bc_command;
bc_command = "get peer list\r\n";
//cout<<"bc_command#"<<bc_command<<"#"<<endl;
int tls_connect_socket_status = 666;
tls_connect_socket_status = tls_connect_socket(tls, s11, "localhost");
//cout<<"tls_connect_socket_status in read_peer_lists.cpp#"<<tls_connect_socket_status<<endl;
//cout<<" tls_error(tls)"<<tls_error(tls)<<endl;
//char* request = (char*)bc_command.c_str();
//cout<<"request#"<<request<<"#"<<endl;
//send(s, request, strlen(request),0);//Daten senden
//send(s11, bc_command.c_str(), bc_command.length(),0);//Daten senden
//cout<<"s11#"<<s11<<endl;
int tls_write_status = 666;
tls_write_status = tls_write(tls, bc_command.c_str(), strlen(bc_command.c_str()));
//cout<<"tls_write_status read_peer_lists.cpp#"<<tls_write_status<<endl;
char response[999999];//Empfangspuffer festlegen
//int bytes;
ssize_t bytes = 0;
string antwort_ausgabe;
vector<string> vektor;
//int i=0;
bool ende = true;
bzero (response, sizeof(response));
while(ende)
{
bytes = tls_read(tls, response, sizeof(response));
//cout<<"bytes read_peer_lists.cpp#"<<bytes<<endl;
//bytes = recv(s, response, sizeof(response), 0);
//i = i + 1;
//cout<<"i#"<<i<<endl;
//cout<<endl<<response;
//cout<<"REMOTE peer_lists von " + bc_peer + "#"<<response<<"#"<<endl;;
//blocks_from_db.append(response);
//cout<<"response#"<<response<<"#"<<endl;
//response_temp = response;
//response_temp.append(response_temp + "@");
int no_peers = strcmp(response, "##NO PEERS##");
if (no_peers == 0)
{
//cout<<"read_peer_lists.cpp NO PEERS continue"<<endl;
close(s11);
ende = false;
continue;
}
else
{
peer_lists.push_back(response);
}
//peer_lists.push_back("#");
//cout<<"response read_peer_lists.cpp#"<<response<<endl;
bzero (response, sizeof(response));
if (bytes == 0)
{
close(s11);
ende = false;
//cout<<"Last Block in redis#"<<response<<endl;
}
if (bytes < 999999)
{
close(s11);
ende = false;
//cout<<"Last Block in redis#"<<response<<endl;
}
if (bytes == -1)
{
close(s11);
ende = false;
//cout<<"Last Block in redis#"<<response<<endl;
}
//bzero (response, sizeof(response));
}
tls_close(tls);
tls_free(tls);
tls_config_free(config);
}
//Array überprüfen und doppelte Einträge löschen
//Sich selbst rausfiletren falls die IP vom Remote Server kommt.
//cout<<"peer_lists.size() in read_peer_lists.cpp#"<<peer_lists.size()<<endl;
//cout<<"peer_lists[0] in read_peer_lists.cpp#"<<peer_lists[0]<<endl;
//###############################################################################
//ENDE
//cout<<"ENDE"<<endl;
}