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read_peer_single_block.cpp
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read_peer_single_block.cpp
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//clear; rm -frv read_peer_single_block.o; g++-7 -g -fPIC -Wall -c read_peer_single_block.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>
#include <errno.h>
#include <gnutls/gnutls.h>
using namespace std;
extern string blocks_from_db;
//extern string bc_command_from_main;
//extern string read_loacal_db_records;
extern string erreichbare_peers_fuer_read_peer_single_block;
extern unsigned long long block_nummer_fuer_read_peer_single_block;
extern vector<string> config_file_parameter;
extern string lokal_ip_adresse;
void read_peer_single_block()
{
//cout<<"read_peer_single_block"<<endl;
//cout<<"\e[1m"<<"read_peer_single_block.cpp"<<"\e[0m"<<endl;
//cout<<"blocks_from_db#"<<blocks_from_db<<"#"<< endl;
//string bc_server = "127.0.0.1";
string bc_server = erreichbare_peers_fuer_read_peer_single_block;
//cout<<"remote bc_server#"<<bc_server<<"#"<<endl;
//string bc_port = "8888";
string bc_port = config_file_parameter[1];
//cout<<"bc_port#"<<bc_port<<endl;
//Eigene IP überspringen
//cout<<"lokal_ip_adresse#"<<lokal_ip_adresse<<"#"<<endl;
//if (lokal_ip_adresse == bc_server);
//if (lokal_ip_adresse.compare(0,99,bc_server) == 0);
int result = strcmp(lokal_ip_adresse.c_str(), bc_server.c_str());
//cout<<"strcmp result#"<<result<<endl;
if (result == 0)
{
//cout<<"Eigene IP"<<endl;
return;
}
//cout<<"Lese single Block via BC Protokoll"<<endl;
//TLS Initialisierung################################
//libressl_TLS Initilisieren
int tls_init_status = 666;
tls_init_status = tls_init();
//cout<<"tls_init_status read_peer_single_block.cpp#"<<tls_init_status<<endl;
//###
struct tls *tls = NULL;
tls = tls_client();
//cout<<"tls_client read_peer_single_block.cpp#"<<tls<<endl;
//###
struct tls_config *config = NULL;
config = tls_config_new();
//cout<<"tls_config_new read_peer_single_block.cpp#"<<config<<endl;
//###
tls_config_insecure_noverifycert(config);
tls_config_insecure_noverifyname(config);
tls_configure(tls, config);
//##################################################
struct hostent *host;//Hostname struktuieren
host = gethostbyname(bc_server.c_str()); //eventuell die IP in DNS Namen umwandeln
struct sockaddr_in addr;
addr.sin_addr = *(struct in_addr*)host->h_addr;
int s4;
s4 = socket(PF_INET, SOCK_STREAM, 0); //Socket aufbauen. wenn -1 dann ist fehlgeschlagen
int bc_port_int = atoi(bc_port.c_str());
addr.sin_port = htons(bc_port_int);//Connection Portnummer des Servers festlegen
addr.sin_family = AF_INET;
struct timeval timeout;
timeout.tv_sec = 10;
timeout.tv_usec = 0;
setsockopt (s4, SOL_SOCKET, SO_SNDTIMEO, &timeout, sizeof (timeout));
setsockopt (s4, SOL_SOCKET, SO_RCVTIMEO, &timeout, sizeof (timeout));
int connect_status = 666;
connect_status = connect(s4,(struct sockaddr*)&addr, sizeof(addr));
//cout<<"connect_status in read_peer_single_block.cpp z. 113# "<<connect_status<<endl;
if (connect_status == -1)
{
//cout<<"Socket error auf der Gegenseite read_peer_single_block.cpp# "<<connect_status<<endl;
//cout<<"bc_server#"<<bc_server<<endl;
//exit(-1);
//continue;
//return (1);
//terminate();
//goto jmp;
//return 0;
//goto exit;
//break;
//exit(0);
//exit;
//return;
}
else
{
int tls_connect_socket_status = 666;
tls_connect_socket_status = tls_connect_socket(tls, s4, "localhost");
//cout<<"tls_connect_socket_status in read_peer_single_block.cpp #"<<tls_connect_socket_status<<endl;
if (tls_connect_socket_status < 0)
{
cout<<" tls_error(tls)"<<tls_error(tls)<<endl;
}
//Redis Command Anzahl der Werte in der Liste
//string bc_command = "LLEN blockchain_list\r\n";
string bc_command;
//bc_command = bc_command_from_main;
//cout<<"block_nummer_fuer_read_peer_single_block#"<<block_nummer_fuer_read_peer_single_block<<endl;
string block_nummer_fuer_read_peer_single_block_string;
stringstream strstream;
strstream << block_nummer_fuer_read_peer_single_block;
strstream >> block_nummer_fuer_read_peer_single_block_string;
bc_command = "get single block " + block_nummer_fuer_read_peer_single_block_string + "\r\n";
//bc_command = "get single block\r\n";
//cout<<"bc_command in #"<<bc_command<<endl;
//cout<<"bc_command_in read all chains#"<<bc_command<<endl;
char* request = (char*)bc_command.c_str();
//cout<<"request#"<<request<<endl;
//send(s4, request, strlen(request),0);//Daten senden
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_single_block.cpp #"<<tls_write_status<<endl;
char response[999999];//Empfangspuffer festlegen
//char response[1024];//Empfangspuffer festlegen
//int bytes;
ssize_t bytes = 0;
string antwort_ausgabe;
vector<string> vektor;
//int i=0;
bool ende3 = true;
bzero (response, sizeof(response));
bytes = 0;
//string last_block_id ;
while(ende3)
{
//bytes = recv(s4, response, sizeof(response), 0);
bytes = tls_read(tls, response, sizeof(response));
//i = i + 1;
//cout<<"i#"<<i<<endl;
//cout<<"response"<<response<<endl;
//cout<<"packet groesse bytes#"<<bytes<<endl;
//blocks_from_db = response
blocks_from_db.append(response);
//if (blocks_from_db != "")
//{
//cout<<"response NICHT leer"<<endl;
//blocks_from_db = blocks_from_db.erase(blocks_from_db.find_last_not_of("\n"));
//cout<<"blocks_from_db in_read_SINGLE BLOCK#"<<blocks_from_db<<endl;
//}
//cout<<"blocks_from_db in_read_SINGLE BLOCK#"<<blocks_from_db<<endl;
bzero (response, sizeof(response));
if (bytes == 0)
{
close(s4);
ende3 = false;
//cout<<"Last Block in redis#"<<response<<endl;
}
/*
if (bytes < 1024)
{
close(s4);
ende3 = false;
//cout<<"Last Block in redis#"<<response<<endl;
}
*/
if (bytes == -1)
{
close(s4);
ende3 = false;
//cout<<"Last Block in redis#"<<response<<endl;
}
if (bytes == 999999)
{
//close(s4);
//cout<<"bytes == 1024"<<endl;
ende3 = true;
}
if (bytes < 999999)
{
//close(s4);
//cout<<"bytes < 1024"<<endl;
//
ende3 = false;
}
//bzero (response, sizeof(response));
}
//cout<<"Schliesse S4 in read_peer_single_block"<<endl;
close(s4);
//cout<<"Response REMOTE Block#"<<blocks_from_db<<"#"<<endl;
tls_close(tls);
tls_free(tls);
tls_config_free(config);
}
//jmp: cout<<"ENDE JUMP"<<endl;
//exit:
// return 0;
//cout<<"ENDE"<<endl;
}