#ifndef __IP_IN_H_
#define __IP_IN_H_

#include "mtcp.h"
#include "mos_api.h"

int
ProcessInIPv4Packet(mtcp_manager_t mtcp, struct pkt_ctx *pctx);

static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl)
{
	unsigned int sum;

	asm("  movl (%1), %0\n"
	    "  subl $4, %2\n"
	    "  jbe 2f\n"
	    "  addl 4(%1), %0\n"
	    "  adcl 8(%1), %0\n"
	    "  adcl 12(%1), %0\n"
	    "1: adcl 16(%1), %0\n"
	    "  lea 4(%1), %1\n"
	    "  decl %2\n"
	    "  jne      1b\n"
	    "  adcl $0, %0\n"
	    "  movl %0, %2\n"
	    "  shrl $16, %0\n"
	    "  addw %w2, %w0\n"
	    "  adcl $0, %0\n"
	    "  notl %0\n"
	    "2:"
	    /* Since the input registers which are loaded with iph and ih
	       are modified, we must also specify them as outputs, or gcc
	       will assume they contain their original values. */
	    : "=r" (sum), "=r" (iph), "=r" (ihl)
	    : "1" (iph), "2" (ihl)
	       : "memory");
	return (__sum16)sum;
}

#endif /* __IP_IN_H_ */