dyncheck.h

一个学习SNMP项目：tmoerlan.

/* $Id: dyncheck.h,v 1.2 2003/09/17 11:26:10 tmoerlan Exp $ */

#ifndef _SNAP_DYNCHECK_H_
#define _SNAP_DYNCHECK_H_

#ifdef __KERNEL__
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/icmp.h>
#define __STRING(x) #x
#endif /* __KERNEL__ */

#ifndef NDYNCHECK
#ifndef __KERNEL__
#define DYNCHECK_RET(expr,retv)                                             \
  { if (!(expr)) {                                                          \
      fprintf(stderr,"%s:%d: dynamic check '%s' failed, dropping packet\n", \
              __FILE__,__LINE__,__STRING(expr));                            \
      fflush(stderr);                                                       \
      return (retv);                                                        \
    }                                                                       \
  }
#else
#define DYNCHECK_RET(expr,retv)                                             \
  { if (!(expr)) {                                                          \
      printk(KERN_WARNING "%s:%d: dynamic check '%s' failed, dropping packet\n", \
              __FILE__,__LINE__,__STRING(expr));                            \
      return (retv);                                                        \
    }                                                                       \
  }
#endif /* !__KERNEL__ */
#ifdef __KERNEL__
#define DYNCHECK(expr) DYNCHECK_RET(expr,-ICMP_PARAMETERPROB)
#else
#define DYNCHECK(expr) DYNCHECK_RET(expr,-1)
#endif /* __KERNEL__ */
#else
#define DYNCHECK(expr) /**/
#define DYNCHECK_RET(expr,retv) /**/
#endif /* !NDYNCHECK */

#define DYNCHECK_IN_HEAP(ho)						\
  DYNCHECK((((void *)(ho) >= p->heap_min) &&				\
	    ((void *)(ho) < p->heap_max) &&				\
	    (((void *)(ho) + 						\
	      ((ho)->len + sizeof(heap_obj))) <= p->heap_max)) ||	\
	   (((void *)(ho) >= (void *)p->stack_max) &&			\
	    ((void *)(ho) < p->h_alloc_heap_max) &&			\
	    (((void *)(ho) + 						\
	      ((ho)->len + sizeof(heap_obj))) <= p->h_alloc_heap_max)))

#define DYNCHECK_ADDR_IN_HEAP(ho)				\
  DYNCHECK((((void *)(ho) >= p->heap_min) &&			\
	    ((void *)(ho) < p->heap_max) &&			\
	    (((void *)(ho) + sizeof(uint32) + 		\
	      sizeof(heap_obj)) <= p->heap_max)) ||		\
	   (((void *)(ho) >= (void *)p->stack_max) &&		\
	    ((void *)(ho) < p->h_alloc_heap_max) &&		\
	    (((void *)(ho) + sizeof(uint32) + 		\
	      sizeof(heap_obj)) <= p->h_alloc_heap_max)))


#endif /* !_SNAP_DYNCHECK_H_ */