SCANNER IP ET PORTS [DEV-C++]

//ScanH by Jhep
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <winsock.h> // c:\dev-c++\lib\libwsock32.a

int CompareIP(SOCKADDR_IN, SOCKADDR_IN);
void Use();
void End();
void Error();

SOCKET ws;

int main(int argc, char *argv[])
{

if (argc < 5){Use(); return 0;}

if (!strcmp(argv[1], "-a")){

SOCKADDR_IN from, to, ip;
long Port;
from.sin_family = to.sin_family = ip.sin_family = AF_INET;
from.sin_addr.S_un.S_addr = inet_addr(argv[2]);
to.sin_addr.S_un.S_addr = inet_addr(argv[3]);
Port = atoi(argv[4]);

if (from.sin_addr.S_un.S_addr ==  to.sin_addr.S_un.S_addr == INADDR_NONE ||
 CompareIP(from, to) == 1 || Port < 0 || Port > 65535) {Use(); return 0;}


WSADATA Info;
if (WSAStartup(MAKEWORD(2,2),&Info)) {Error(); return 0;};
if ((ws = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == INVALID_SOCKET) {Error(); return 0;}

printf(" ScanH\n\nScan les IP de %s à %s sur le port %s.\n\n", argv[2], argv[3], argv[4]);

ip = from;
ip.sin_port = htons(Port);
do{
printf("IP : %d.%d.%d.%d", ip.sin_addr.S_un.S_un_b.s_b1, ip.sin_addr.S_un.S_un_b.s_b2, ip.sin_addr.S_un.S_un_b.s_b3,
 ip.sin_addr.S_un.S_un_b.s_b4);

if (!connect(ws, (sockaddr *) &ip, sizeof(ip))){
printf(" OK");
closesocket(ws);
if ((ws = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == INVALID_SOCKET) {Error(); return 0;}
}
printf("\n");

ip.sin_addr.S_un.S_un_b.s_b4++;
if (ip.sin_addr.S_un.S_un_b.s_b4 > 255){ip.sin_addr.S_un.S_un_b.s_b4 = 0; ip.sin_addr.S_un.S_un_b.s_b3++;}
if (ip.sin_addr.S_un.S_un_b.s_b3 > 255){ip.sin_addr.S_un.S_un_b.s_b3 = 0; ip.sin_addr.S_un.S_un_b.s_b2++;}
if (ip.sin_addr.S_un.S_un_b.s_b2 > 255){ip.sin_addr.S_un.S_un_b.s_b2 = 0; ip.sin_addr.S_un.S_un_b.s_b1++;}
if (ip.sin_addr.S_un.S_un_b.s_b1 > 255) break;
} while (CompareIP(ip, to) == 2 || CompareIP(ip, to) == 3);
End();
return 0;
}

if (!strcmp(argv[1], "-p")){

SOCKADDR_IN ip;
long Port1, Port2, Port;
ip.sin_family = AF_INET;
ip.sin_addr.S_un.S_addr = inet_addr(argv[2]);
Port1 = atoi(argv[3]);
Port2 = atoi(argv[4]);
if (ip.sin_addr.S_un.S_addr == INADDR_NONE || Port1 < 0 || Port1 > 65535 || Port2 < 0 || Port2 > 65535 || Port1 > Port2)
 Use();

WSADATA Info;
WSAStartup(MAKEWORD(2, 2), &Info);
if ((ws = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == INVALID_SOCKET) {Error(); return 0;}

printf(" ScanH\n\nScan l'IP %s sur les ports %s à %s.\n\n", argv[2], argv[3], argv[4]);

Port = Port1;
do{
printf("Port : %d", Port);
ip.sin_port = htons(Port);
if (!connect(ws, (sockaddr *) &ip, sizeof(ip))){
printf(" OK", Port);
closesocket(ws);
if ((ws = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == INVALID_SOCKET) {Error(); return 0;}
}
printf("\n");
Port++;
}while(Port <= Port2);
End();
}
else{
Use();
}

return 0;
}

int CompareIP(SOCKADDR_IN IP1, SOCKADDR_IN IP2)
{
double Nb1, Nb2;
Nb1 = IP1.sin_addr.S_un.S_un_b.s_b4 + IP1.sin_addr.S_un.S_un_b.s_b3 * 0x100 + IP1.sin_addr.S_un.S_un_b.s_b2 * 0x10000 + IP1.sin_addr.S_un.S_un_b.s_b1 * 0x1000000;
Nb2 = IP2.sin_addr.S_un.S_un_b.s_b4 + IP2.sin_addr.S_un.S_un_b.s_b3 * 0x100 + IP2.sin_addr.S_un.S_un_b.s_b2 * 0x10000 + IP2.sin_addr.S_un.S_un_b.s_b1 * 0x1000000;
if (Nb1 > Nb2) return 1;
if (Nb1 < Nb2) return 2;
if (Nb1 == Nb2) return 3;
}

void Use()
{
printf(" ScanH\n\nUtilisation :\nScanH.exe -a IPdeDepart IPdeFin Port\nou\nScanH.exe -p IP PortdeDepart PortdeFin\n");
system("pause");
}

void End()
{
closesocket(ws);
WSACleanup();
system("pause");
}

void Error()
{
printf("\nErreur !\n");
system("pause");
}