Subversion Repositories minsoc

#include <stdio.h>

#include <string.h>

//packet socket

#include <sys/socket.h>

#include <netpacket/packet.h>

#include <net/ethernet.h>

//protocol

#include <linux/if_ether.h>

//netdevice stuff

#include <sys/ioctl.h>

#include <net/if.h>

//file open stuff

#include <sys/types.h>

#include <sys/stat.h>

#include <fcntl.h>

//arp stuff

//#include <linux/if_arp.h>

#define MAC_ADDR_LEN 6

typedef unsigned char MacAddress[MAC_ADDR_LEN];

int main()

{

    int socket_id, new_sock, iRet = -1;

    int addrlen, bytesread, nfound =0;

    int i = 0;

    MacAddress localMac = {0x00, 0x00, 0xC0, 0x41, 0x36, 0xD3};

    MacAddress extMac = {0x55, 0x47, 0x34, 0x22, 0x88, 0x92};

//    MacAddress extMac = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00};

    char buf[256];

    struct sockaddr_ll my_addr;

    struct ifreq ethreq;

    int if_index;

    if ( ( socket_id = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_ALL) ) ) < 0  )

    {

        perror("socket");

        exit(1);

    }

    else

    {

        printf("Socket has been created: socket_number %d\n", socket_id);

    }

    //GET ethreq for if "eth1"

    strncpy(ethreq.ifr_name,"eth1",IFNAMSIZ);

    ioctl(socket_id, SIOCGIFFLAGS, &ethreq);

    //SET promisc mode for if ethreq

//    ethreq.ifr_flags |= IFF_PROMISC;

//    ioctl(socket_id, SIOCSIFFLAGS, &ethreq);

    //request index

    ioctl(socket_id, SIOCGIFINDEX, &ethreq);

    if_index = ethreq.ifr_ifindex;

    printf("This is the index of the interface: %d\n", if_index );

    memset(&my_addr, '0', sizeof(my_addr) );

    my_addr.sll_family = AF_PACKET;

    my_addr.sll_protocol = htons(ETH_P_ALL);  //defaults to socket protocol

    my_addr.sll_ifindex = if_index;

//    my_addr.sll_hatype = htons(ARPHRD_ETHER);

//    my_addr.sll_pkttype = PACKET_OTHERHOST;

    my_addr.sll_halen = 6;

    memcpy( &(my_addr.sll_addr), localMac, MAC_ADDR_LEN );

     //request hw_addres

    ioctl(socket_id, SIOCGIFHWADDR, &ethreq);

    printf("This is the address of my card: %d\n", my_addr.sll_addr[5] );

    if ( bind( socket_id, (struct sockaddr *) &my_addr, sizeof(my_addr) ) )

    {

        perror("bind");

        exit(1);

    }

    struct sockaddr_ll addr_to;

    int addr_toLen;

    addr_toLen = sizeof(addr_to);

    memset(&addr_to, '0', sizeof(addr_to) );

    addr_to.sll_family = AF_PACKET;

    addr_to.sll_ifindex = if_index;

    addr_to.sll_halen = 6;

    memcpy( &(addr_to.sll_addr), extMac, MAC_ADDR_LEN );

    for (i=0; i<256 ; i++ )

            buf[i] = 0;

    //first 2 bytes are gathered with length and are ignored

    buf[0] = 0xAA;

    buf[1] = 0xAA;

    //now it gets to fpga: send opcode 0xBA8

    buf[2] = 0xBA;

    buf[3] = 0x87;

    //opcode sent

    buf[4] = 0xAA;

    buf[5] = 0xAA;

    buf[6] = 0xAA;

    buf[7] = 0xAA;

    buf[8] = 0xAA;

    buf[9] = 0xAA;

    buf[10] = 0xAA;

    buf[11] = 0xAA;

//    for (;;)

//    {

        iRet = sendto(socket_id, buf, 46, 0, (struct sockaddr *) &addr_to, addr_toLen);

        if ( iRet == -1 )

        {

            perror("sendto");

            exit(1);

        }

        else

        {

//            printf("%s\n", buf);

              printf("Data sent!\nExiting...\n");

        }

//    }

    return 0;

}