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Code: Select all

#include <sys/types.h>
#include <winsock.h>
#include <stdio.h>

int main()
{
    WSADATA wsaData;
    SOCKADDR_IN sin;
    SOCKADDR sina;
    int sina_size;
    int iResult;
    hostent* localHost;
    char* localIP;
    char *message, *rec;
    int rec_size;
    
    
    system("pause");
    
    iResult = WSAStartup(MAKEWORD(2,2), &wsaData);
    if (iResult != 0) {
       printf("WSAStartup failed: %d\n", iResult);
       return 1;
    }
    //get a free socket
    int socknumb = socket(AF_INET, SOCK_STREAM, 0);
    printf("%i\n", socknumb);
    
    localHost = gethostbyname("");
    localIP = inet_ntoa (*(struct in_addr *)*localHost->h_addr_list);

    sin.sin_family = AF_INET;
    sin.sin_addr.s_addr = inet_addr(localIP);
    sin.sin_port = htons(1024);
    //bind the socket
    int bindresult = bind(socknumb, (LPSOCKADDR)&sin, sizeof(sin));
    printf("%i\n", bindresult);
    
    sockaddr_in server; 
    server.sin_family = AF_INET;
    server.sin_addr.s_addr = inet_addr( "216.239.51.125" );
    server.sin_port = htons( 80 );
    //connect to the server
    int connectresult = connect(socknumb, (LPSOCKADDR)&server, sizeof(server));
    printf("%d\n", connectresult);

    while( 1 == 1 )
    {    
    //start message crafting here
    message = (char*) malloc (12);
    message[0] = char( 8 );
    message[1] = char( 0 );
    message[2] = char( 48 );
    message[3] = char( 0x5c );
    message[4] = char( 1 );
    message[5] = char( 0 );
    message[6] = char( 4 );
    message[7] = char( 0 );
     //end message craft  and send the packet
    int sendresult = send(socknumb, message, 32, MSG_DONTROUTE);
    printf("%d\n", sendresult);
    
    shutdown(socknumb, SD_SEND);
    //recv code
    int recresult = 1;
    rec = (char*) malloc (rec_size);
    recresult = recv(socknumb, rec, rec_size, 0); 
    int err = WSAGetLastError();
    printf("%d %d\n", recresult, err);
    int x = 0;
    while(x < rec_size)
    {
         printf("%i ", int(rec[x]));
         x++;
    }
    printf("\n");
    
    system("pause");
    }
}

Code: Select all

int int_char2(unsigned int tohex, char *ctwo)
{
    int remainder;
    int x = 4;
    int hex[x];
    x--;
    ctwo = (char*) malloc (2);
    while(x >= 0)
    {
         remainder = tohex % int(pow(float(16) , float(x)));
         if(remainder < tohex)
         {
              tohex = tohex - remainder;
              tohex = tohex / int(pow(float(16) , float(x)));
              if(tohex < 10)
              {
                   hex[x] = tohex;    
              }
              else
              {
                   hex[x] = tohex;
              }
         }
         else
         {
             hex[x] = 0;
         }
         tohex = remainder;
         x--;
    }
    
    ctwo[0] = (hex[3] * 16) + hex[2];
    ctwo[1] = (hex[1] * 16) + hex[0];
    return 0;
}

int int_char4(unsigned long tohex, char *cfour)
{
    int remainder;
    int x = 8;
    int hex[x];
    x--;
    cfour = (char*) malloc (4);
    while(x >= 0)
    {
         remainder = tohex % int(pow(float(16) , float(x)));
         if(remainder < tohex)
         {
              tohex = tohex - remainder;
              tohex = tohex / int(pow(float(16) , float(x)));
              if(tohex < 10)
              {
                   hex[x] = tohex;    
              }
              else
              {
                   hex[x] = tohex;
              }
         }
         else
         {
             hex[x] = 0;
         }
         tohex = remainder;
         x--;
    }
    
    cfour[0] = (hex[7] * 16) + hex[6];
    cfour[1] = (hex[5] * 16) + hex[4];
    cfour[3] = (hex[3] * 16) + hex[2];
    cfour[4] = (hex[1] * 16) + hex[0];
    return 0;
}

int TCP_to96(char* packet, unsigned int Source_Port, unsigned int Destination_Port, unsigned long Sequence_Number, unsigned long ACK_Number)
{
     char dummyt[2], dummyf[4];
     
     packet = (char*) malloc (12);
     int packet_size = sizeof(packet);
     
     int_char2(Source_Port, dummyt);
     packet[0] = dummyt[0];
     packet[1] = dummyt[1];
     
     int_char2(Destination_Port, dummyt);
     packet[2] = dummyt[0];
     packet[3] = dummyt[1];
     
     int_char4(Sequence_Number, dummyf);
     packet[4] = dummyf[0];
     packet[5] = dummyf[1];
     packet[6] = dummyf[2];
     packet[7] = dummyf[3];
     
     int_char4(ACK_Number, dummyf);
     packet[8] = dummyf[0];
     packet[9] = dummyf[1];
     packet[10] = dummyf[2];
     packet[11] = dummyf[3];
     
     return packet_size;
}

Code: Select all

#include <stdlib.h>
#include <stdio.h>

#include <pcap.h>


int main(int argc, char **argv)
{
	pcap_t *fp;
	char errbuf[PCAP_ERRBUF_SIZE];
	u_char packet[100];
	int i;
	
	/* Check the validity of the command line */
	if (argc != 2)
	{
		printf("usage: %s interface", argv[0]);
		return 1;
	}
    
	/* Open the adapter */
	if ((fp = pcap_open_live(argv[1],		// name of the device
							 65536,			// portion of the packet to capture. It doesn't matter in this case 
							 1,				// promiscuous mode (nonzero means promiscuous)
							 1000,			// read timeout
							 errbuf			// error buffer
							 )) == NULL)
	{
		fprintf(stderr,"\nUnable to open the adapter. %s is not supported by WinPcap\n", argv[1]);
		return 2;
	}

	/* Supposing to be on ethernet, set mac destination to 1:1:1:1:1:1 */
	packet[0]=1;
	packet[1]=1;
	packet[2]=1;
	packet[3]=1;
	packet[4]=1;
	packet[5]=1;
	
	/* set mac source to 2:2:2:2:2:2 */
	packet[6]=2;
	packet[7]=2;
	packet[8]=2;
	packet[9]=2;
	packet[10]=2;
	packet[11]=2;

       //build the rest of the headers here. 
	
	/* Fill the rest of the packet */
	for(i=12;i<100;i++)
	{
		packet[i]=i%256;
	}

	/* Send down the packet */
	if (pcap_sendpacket(fp,	// Adapter
		packet,				// buffer with the packet
		100					// size
		) != 0)
	{
		fprintf(stderr,"\nError sending the packet: \n", pcap_geterr(fp));
		return 3;
	}

	pcap_close(fp);	
	return 0;
}