void FUN_004041e4(int *param_1)

{

  int *piVar1;

  int *piVar2;

  int *piVar3;

  piVar3 = dhcp6_if;

  if (dhcp6_if != (int *)0x0) {

    do {

      if ((param_1 == (int *)0x0) || (param_1 == piVar3)) {

        release_all_ia(piVar3);

        piVar2 = (int *)piVar3[2];

        while (piVar1 = piVar2, piVar1 != (int *)0x0) {

          piVar2 = (int *)*piVar1;

          if (piVar1[0xf] != 6) {

            dhcp6_remove_event(piVar1);

          }

        }

      }

      piVar3 = (int *)*piVar3;

    } while (piVar3 != (int *)0x0);

  }

  return;

}