CAN-Error Counter

Hallo zusammen.

Ich stehe vor folgendem Problem: Ich möchte mir die Errors beim 
Versenden einer Nachricht zählen lassen. Bis jetzt sieht der C++ Code so 
aus:
(Ich verwende die Standard-Linux CAN-Lib:
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <linux/can.h>
#include <linux/can/raw.h>)



#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include "DebugUtilities.h"

#define OCA_CAN_FLT_MASK 0x1FFFFFE0
#define OCA_CAN_FLT_ID   0x00000500

CSocketCan::CSocketCan() : m_sock(0) {}
CSocketCan::~CSocketCan() {  Close(); }

bool CSocketCan::Init(const char* ifname)
{
  // make sure it's closed before initializing another socket
  Close();

  if ((m_sock = socket(PF_CAN, SOCK_RAW, CAN_RAW)) < 0) {
    LOG_DEBUG( "Error opening socket" );
    return false;
  }

  //  Turn off all reception
  setsockopt( m_sock, SOL_CAN_RAW, CAN_RAW_FILTER, NULL, 0 );

    //int recv_own_msgs( 0 );
    //setsockopt(m_sock, SOL_CAN_RAW, CAN_RAW_RECV_OWN_MSGS, 
&recv_own_msgs, sizeof(recv_own_msgs));

    // detemine address
  struct ifreq ifr;
  strcpy(ifr.ifr_name, ifname);
  ioctl(m_sock, SIOCGIFINDEX, &ifr);


  struct sockaddr_can addr;
  memset(&addr,0,sizeof(addr)); // Initialize the sockaddr_can 
structure.
  addr.can_family = AF_CAN;
  addr.can_ifindex = ifr.ifr_ifindex;

    // bind socket to desired address
  if (bind(m_sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
    LOG_DEBUG( "Error binding to socket address" );
    return false;
    }


  LOG_DEBUG("socket: %i", m_sock);
  return true;
}

Dieser Socket müsste ja iwie die Errors speichern, wie greif ich da 
genau drauf zu.

Thx shinpei...